cvmx-usb module provided Cavium "OS abstraction layer" for USB
functionality. To make this driver a proper Linux driver, we need to
refactor this layer out. By making all the code internal to the HCD
driver makes this task easier.
Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
---
drivers/staging/octeon-usb/Makefile | 4 +-
drivers/staging/octeon-usb/cvmx-usb.c | 3186 ----------------------------
drivers/staging/octeon-usb/cvmx-usb.h | 521 -----
drivers/staging/octeon-usb/octeon-hcd.c | 3417 ++++++++++++++++++++++++++++++-
4 files changed, 3417 insertions(+), 3711 deletions(-)
delete mode 100644 drivers/staging/octeon-usb/cvmx-usb.c
delete mode 100644 drivers/staging/octeon-usb/cvmx-usb.h
diff --git a/drivers/staging/octeon-usb/Makefile b/drivers/staging/octeon-usb/Makefile
index 89df1ad..5588be3 100644
--- a/drivers/staging/octeon-usb/Makefile
+++ b/drivers/staging/octeon-usb/Makefile
@@ -1,3 +1 @@
-obj-${CONFIG_OCTEON_USB} := octeon-usb.o
-octeon-usb-y := octeon-hcd.o
-octeon-usb-y += cvmx-usb.o
+obj-${CONFIG_OCTEON_USB} := octeon-hcd.o
diff --git a/drivers/staging/octeon-usb/cvmx-usb.c b/drivers/staging/octeon-usb/cvmx-usb.c
deleted file mode 100644
index 910a657..0000000
--- a/drivers/staging/octeon-usb/cvmx-usb.c
+++ /dev/null
@@ -1,3186 +0,0 @@
-/***********************license start***************
- * Copyright (c) 2003-2010 Cavium Networks (support@xxxxxxxxxx). All rights
- * reserved.
- *
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
-
- * * Neither the name of Cavium Networks nor the names of
- * its contributors may be used to endorse or promote products
- * derived from this software without specific prior written
- * permission.
-
- * This Software, including technical data, may be subject to U.S. export
- * control laws, including the U.S. Export Administration Act and its associated
- * regulations, and may be subject to export or import regulations in other
- * countries.
-
- * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
- * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
- * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
- * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION
- * OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
- * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
- * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
- * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
- * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
- * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
- ***********************license end**************************************/
-
-
-/**
- * @file
- *
- * "cvmx-usb.c" defines a set of low level USB functions to help
- * developers create Octeon USB drivers for various operating
- * systems. These functions provide a generic API to the Octeon
- * USB blocks, hiding the internal hardware specific
- * operations.
- */
-#include <linux/delay.h>
-#include <asm/octeon/cvmx.h>
-#include <asm/octeon/octeon.h>
-#include <asm/octeon/cvmx-sysinfo.h>
-#include "cvmx-usbnx-defs.h"
-#include "cvmx-usbcx-defs.h"
-#include "cvmx-usb.h"
-#include <asm/octeon/cvmx-helper.h>
-#include <asm/octeon/cvmx-helper-board.h>
-
-/* Normal prefetch that use the pref instruction. */
-#define CVMX_PREFETCH(address, offset) asm volatile ("pref %[type], %[off](%[rbase])" : : [rbase] "d" (address), [off] "I" (offset), [type] "n" (0))
-
-/* Maximum number of times to retry failed transactions */
-#define MAX_RETRIES 3
-
-/* Maximum number of pipes that can be open at once */
-#define MAX_PIPES 32
-
-/* Maximum number of outstanding transactions across all pipes */
-#define MAX_TRANSACTIONS 256
-
-/* Maximum number of hardware channels supported by the USB block */
-#define MAX_CHANNELS 8
-
-/* The highest valid USB device address */
-#define MAX_USB_ADDRESS 127
-
-/* The highest valid USB endpoint number */
-#define MAX_USB_ENDPOINT 15
-
-/* The highest valid port number on a hub */
-#define MAX_USB_HUB_PORT 15
-
-/*
- * The low level hardware can transfer a maximum of this number of bytes in each
- * transfer. The field is 19 bits wide
- */
-#define MAX_TRANSFER_BYTES ((1<<19)-1)
-
-/*
- * The low level hardware can transfer a maximum of this number of packets in
- * each transfer. The field is 10 bits wide
- */
-#define MAX_TRANSFER_PACKETS ((1<<10)-1)
-
-enum cvmx_usb_transaction_flags {
- __CVMX_USB_TRANSACTION_FLAGS_IN_USE = 1<<16,
-};
-
-enum {
- USB_CLOCK_TYPE_REF_12,
- USB_CLOCK_TYPE_REF_24,
- USB_CLOCK_TYPE_REF_48,
- USB_CLOCK_TYPE_CRYSTAL_12,
-};
-
-/**
- * Logical transactions may take numerous low level
- * transactions, especially when splits are concerned. This
- * enum represents all of the possible stages a transaction can
- * be in. Note that split completes are always even. This is so
- * the NAK handler can backup to the previous low level
- * transaction with a simple clearing of bit 0.
- */
-enum cvmx_usb_stage {
- CVMX_USB_STAGE_NON_CONTROL,
- CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE,
- CVMX_USB_STAGE_SETUP,
- CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE,
- CVMX_USB_STAGE_DATA,
- CVMX_USB_STAGE_DATA_SPLIT_COMPLETE,
- CVMX_USB_STAGE_STATUS,
- CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE,
-};
-
-/**
- * struct cvmx_usb_transaction - describes each pending USB transaction
- * regardless of type. These are linked together
- * to form a list of pending requests for a pipe.
- *
- * @prev: Transaction before this one in the pipe.
- * @next: Transaction after this one in the pipe.
- * @type: Type of transaction, duplicated of the pipe.
- * @flags: State flags for this transaction.
- * @buffer: User's physical buffer address to read/write.
- * @buffer_length: Size of the user's buffer in bytes.
- * @control_header: For control transactions, physical address of the 8
- * byte standard header.
- * @iso_start_frame: For ISO transactions, the starting frame number.
- * @iso_number_packets: For ISO transactions, the number of packets in the
- * request.
- * @iso_packets: For ISO transactions, the sub packets in the request.
- * @actual_bytes: Actual bytes transfer for this transaction.
- * @stage: For control transactions, the current stage.
- * @callback: User's callback function when complete.
- * @callback_data: User's data.
- */
-struct cvmx_usb_transaction {
- struct cvmx_usb_transaction *prev;
- struct cvmx_usb_transaction *next;
- enum cvmx_usb_transfer type;
- enum cvmx_usb_transaction_flags flags;
- uint64_t buffer;
- int buffer_length;
- uint64_t control_header;
- int iso_start_frame;
- int iso_number_packets;
- struct cvmx_usb_iso_packet *iso_packets;
- int xfersize;
- int pktcnt;
- int retries;
- int actual_bytes;
- enum cvmx_usb_stage stage;
- cvmx_usb_callback_func_t callback;
- void *callback_data;
-};
-
-/**
- * struct cvmx_usb_pipe - a pipe represents a virtual connection between Octeon
- * and some USB device. It contains a list of pending
- * request to the device.
- *
- * @prev: Pipe before this one in the list
- * @next: Pipe after this one in the list
- * @head: The first pending transaction
- * @tail: The last pending transaction
- * @interval: For periodic pipes, the interval between packets in
- * frames
- * @next_tx_frame: The next frame this pipe is allowed to transmit on
- * @flags: State flags for this pipe
- * @device_speed: Speed of device connected to this pipe
- * @transfer_type: Type of transaction supported by this pipe
- * @transfer_dir: IN or OUT. Ignored for Control
- * @multi_count: Max packet in a row for the device
- * @max_packet: The device's maximum packet size in bytes
- * @device_addr: USB device address at other end of pipe
- * @endpoint_num: USB endpoint number at other end of pipe
- * @hub_device_addr: Hub address this device is connected to
- * @hub_port: Hub port this device is connected to
- * @pid_toggle: This toggles between 0/1 on every packet send to track
- * the data pid needed
- * @channel: Hardware DMA channel for this pipe
- * @split_sc_frame: The low order bits of the frame number the split
- * complete should be sent on
- */
-struct cvmx_usb_pipe {
- struct cvmx_usb_pipe *prev;
- struct cvmx_usb_pipe *next;
- struct cvmx_usb_transaction *head;
- struct cvmx_usb_transaction *tail;
- uint64_t interval;
- uint64_t next_tx_frame;
- enum cvmx_usb_pipe_flags flags;
- enum cvmx_usb_speed device_speed;
- enum cvmx_usb_transfer transfer_type;
- enum cvmx_usb_direction transfer_dir;
- int multi_count;
- uint16_t max_packet;
- uint8_t device_addr;
- uint8_t endpoint_num;
- uint8_t hub_device_addr;
- uint8_t hub_port;
- uint8_t pid_toggle;
- uint8_t channel;
- int8_t split_sc_frame;
-};
-
-/**
- * struct cvmx_usb_pipe_list
- *
- * @head: Head of the list, or NULL if empty.
- * @tail: Tail if the list, or NULL if empty.
- */
-struct cvmx_usb_pipe_list {
- struct cvmx_usb_pipe *head;
- struct cvmx_usb_pipe *tail;
-};
-
-struct cvmx_usb_tx_fifo {
- struct {
- int channel;
- int size;
- uint64_t address;
- } entry[MAX_CHANNELS+1];
- int head;
- int tail;
-};
-
-/**
- * struct cvmx_usb_internal_state - the state of the USB block
- *
- * init_flags: Flags passed to initialize.
- * index: Which USB block this is for.
- * idle_hardware_channels: Bit set for every idle hardware channel.
- * usbcx_hprt: Stored port status so we don't need to read a CSR to
- * determine splits.
- * pipe_for_channel: Map channels to pipes.
- * free_transaction_head: List of free transactions head.
- * free_transaction_tail: List of free transactions tail.
- * pipe: Storage for pipes.
- * transaction: Storage for transactions.
- * callback: User global callbacks.
- * callback_data: User data for each callback.
- * indent: Used by debug output to indent functions.
- * port_status: Last port status used for change notification.
- * free_pipes: List of all pipes that are currently closed.
- * idle_pipes: List of open pipes that have no transactions.
- * active_pipes: Active pipes indexed by transfer type.
- * frame_number: Increments every SOF interrupt for time keeping.
- * active_split: Points to the current active split, or NULL.
- */
-struct cvmx_usb_internal_state {
- int init_flags;
- int index;
- int idle_hardware_channels;
- union cvmx_usbcx_hprt usbcx_hprt;
- struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS];
- struct cvmx_usb_transaction *free_transaction_head;
- struct cvmx_usb_transaction *free_transaction_tail;
- struct cvmx_usb_pipe pipe[MAX_PIPES];
- struct cvmx_usb_transaction transaction[MAX_TRANSACTIONS];
- cvmx_usb_callback_func_t callback[__CVMX_USB_CALLBACK_END];
- void *callback_data[__CVMX_USB_CALLBACK_END];
- int indent;
- struct cvmx_usb_port_status port_status;
- struct cvmx_usb_pipe_list free_pipes;
- struct cvmx_usb_pipe_list idle_pipes;
- struct cvmx_usb_pipe_list active_pipes[4];
- uint64_t frame_number;
- struct cvmx_usb_transaction *active_split;
- struct cvmx_usb_tx_fifo periodic;
- struct cvmx_usb_tx_fifo nonperiodic;
-};
-
-/* This macro spins on a field waiting for it to reach a value */
-#define CVMX_WAIT_FOR_FIELD32(address, type, field, op, value, timeout_usec)\
- ({int result; \
- do { \
- uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \
- octeon_get_clock_rate() / 1000000; \
- type c; \
- while (1) { \
- c.u32 = __cvmx_usb_read_csr32(usb, address); \
- if (c.s.field op (value)) { \
- result = 0; \
- break; \
- } else if (cvmx_get_cycle() > done) { \
- result = -1; \
- break; \
- } else \
- cvmx_wait(100); \
- } \
- } while (0); \
- result; })
-
-/*
- * This macro logically sets a single field in a CSR. It does the sequence
- * read, modify, and write
- */
-#define USB_SET_FIELD32(address, type, field, value) \
- do { \
- type c; \
- c.u32 = __cvmx_usb_read_csr32(usb, address); \
- c.s.field = value; \
- __cvmx_usb_write_csr32(usb, address, c.u32); \
- } while (0)
-
-/* Returns the IO address to push/pop stuff data from the FIFOs */
-#define USB_FIFO_ADDRESS(channel, usb_index) (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000)
-
-static int octeon_usb_get_clock_type(void)
-{
- switch (cvmx_sysinfo_get()->board_type) {
- case CVMX_BOARD_TYPE_BBGW_REF:
- case CVMX_BOARD_TYPE_LANAI2_A:
- case CVMX_BOARD_TYPE_LANAI2_U:
- case CVMX_BOARD_TYPE_LANAI2_G:
- case CVMX_BOARD_TYPE_UBNT_E100:
- return USB_CLOCK_TYPE_CRYSTAL_12;
- }
- return USB_CLOCK_TYPE_REF_48;
-}
-
-/**
- * Read a USB 32bit CSR. It performs the necessary address swizzle
- * for 32bit CSRs and logs the value in a readable format if
- * debugging is on.
- *
- * @usb: USB block this access is for
- * @address: 64bit address to read
- *
- * Returns: Result of the read
- */
-static inline uint32_t __cvmx_usb_read_csr32(struct cvmx_usb_internal_state *usb,
- uint64_t address)
-{
- uint32_t result = cvmx_read64_uint32(address ^ 4);
- return result;
-}
-
-
-/**
- * Write a USB 32bit CSR. It performs the necessary address
- * swizzle for 32bit CSRs and logs the value in a readable format
- * if debugging is on.
- *
- * @usb: USB block this access is for
- * @address: 64bit address to write
- * @value: Value to write
- */
-static inline void __cvmx_usb_write_csr32(struct cvmx_usb_internal_state *usb,
- uint64_t address, uint32_t value)
-{
- cvmx_write64_uint32(address ^ 4, value);
- cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
-}
-
-
-/**
- * Read a USB 64bit CSR. It logs the value in a readable format if
- * debugging is on.
- *
- * @usb: USB block this access is for
- * @address: 64bit address to read
- *
- * Returns: Result of the read
- */
-static inline uint64_t __cvmx_usb_read_csr64(struct cvmx_usb_internal_state *usb,
- uint64_t address)
-{
- uint64_t result = cvmx_read64_uint64(address);
- return result;
-}
-
-
-/**
- * Write a USB 64bit CSR. It logs the value in a readable format
- * if debugging is on.
- *
- * @usb: USB block this access is for
- * @address: 64bit address to write
- * @value: Value to write
- */
-static inline void __cvmx_usb_write_csr64(struct cvmx_usb_internal_state *usb,
- uint64_t address, uint64_t value)
-{
- cvmx_write64_uint64(address, value);
-}
-
-/**
- * Return non zero if this pipe connects to a non HIGH speed
- * device through a high speed hub.
- *
- * @usb: USB block this access is for
- * @pipe: Pipe to check
- *
- * Returns: Non zero if we need to do split transactions
- */
-static inline int __cvmx_usb_pipe_needs_split(struct cvmx_usb_internal_state *usb, struct cvmx_usb_pipe *pipe)
-{
- return ((pipe->device_speed != CVMX_USB_SPEED_HIGH) && (usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH));
-}
-
-
-/**
- * Trivial utility function to return the correct PID for a pipe
- *
- * @pipe: pipe to check
- *
- * Returns: PID for pipe
- */
-static inline int __cvmx_usb_get_data_pid(struct cvmx_usb_pipe *pipe)
-{
- if (pipe->pid_toggle)
- return 2; /* Data1 */
- else
- return 0; /* Data0 */
-}
-
-
-/**
- * Return the number of USB ports supported by this Octeon
- * chip. If the chip doesn't support USB, or is not supported
- * by this API, a zero will be returned. Most Octeon chips
- * support one usb port, but some support two ports.
- * cvmx_usb_initialize() must be called on independent
- * struct cvmx_usb_state.
- *
- * Returns: Number of port, zero if usb isn't supported
- */
-int cvmx_usb_get_num_ports(void)
-{
- int arch_ports = 0;
-
- if (OCTEON_IS_MODEL(OCTEON_CN56XX))
- arch_ports = 1;
- else if (OCTEON_IS_MODEL(OCTEON_CN52XX))
- arch_ports = 2;
- else if (OCTEON_IS_MODEL(OCTEON_CN50XX))
- arch_ports = 1;
- else if (OCTEON_IS_MODEL(OCTEON_CN31XX))
- arch_ports = 1;
- else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
- arch_ports = 1;
- else
- arch_ports = 0;
-
- return arch_ports;
-}
-
-
-/**
- * Allocate a usb transaction for use
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: Transaction or NULL
- */
-static inline struct cvmx_usb_transaction *__cvmx_usb_alloc_transaction(struct cvmx_usb_internal_state *usb)
-{
- struct cvmx_usb_transaction *t;
- t = usb->free_transaction_head;
- if (t) {
- usb->free_transaction_head = t->next;
- if (!usb->free_transaction_head)
- usb->free_transaction_tail = NULL;
- }
- if (t) {
- memset(t, 0, sizeof(*t));
- t->flags = __CVMX_USB_TRANSACTION_FLAGS_IN_USE;
- }
- return t;
-}
-
-
-/**
- * Free a usb transaction
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @transaction:
- * Transaction to free
- */
-static inline void __cvmx_usb_free_transaction(struct cvmx_usb_internal_state *usb,
- struct cvmx_usb_transaction *transaction)
-{
- transaction->flags = 0;
- transaction->prev = NULL;
- transaction->next = NULL;
- if (usb->free_transaction_tail)
- usb->free_transaction_tail->next = transaction;
- else
- usb->free_transaction_head = transaction;
- usb->free_transaction_tail = transaction;
-}
-
-
-/**
- * Add a pipe to the tail of a list
- * @list: List to add pipe to
- * @pipe: Pipe to add
- */
-static inline void __cvmx_usb_append_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe)
-{
- pipe->next = NULL;
- pipe->prev = list->tail;
- if (list->tail)
- list->tail->next = pipe;
- else
- list->head = pipe;
- list->tail = pipe;
-}
-
-
-/**
- * Remove a pipe from a list
- * @list: List to remove pipe from
- * @pipe: Pipe to remove
- */
-static inline void __cvmx_usb_remove_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe)
-{
- if (list->head == pipe) {
- list->head = pipe->next;
- pipe->next = NULL;
- if (list->head)
- list->head->prev = NULL;
- else
- list->tail = NULL;
- } else if (list->tail == pipe) {
- list->tail = pipe->prev;
- list->tail->next = NULL;
- pipe->prev = NULL;
- } else {
- pipe->prev->next = pipe->next;
- pipe->next->prev = pipe->prev;
- pipe->prev = NULL;
- pipe->next = NULL;
- }
-}
-
-
-/**
- * Initialize a USB port for use. This must be called before any
- * other access to the Octeon USB port is made. The port starts
- * off in the disabled state.
- *
- * @state: Pointer to an empty struct cvmx_usb_state
- * that will be populated by the initialize call.
- * This structure is then passed to all other USB
- * functions.
- * @usb_port_number:
- * Which Octeon USB port to initialize.
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_initialize(struct cvmx_usb_state *state, int usb_port_number)
-{
- union cvmx_usbnx_clk_ctl usbn_clk_ctl;
- union cvmx_usbnx_usbp_ctl_status usbn_usbp_ctl_status;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
- enum cvmx_usb_initialize_flags flags = 0;
-
- /* Make sure that state is large enough to store the internal state */
- if (sizeof(*state) < sizeof(*usb))
- return -EINVAL;
- /* At first allow 0-1 for the usb port number */
- if ((usb_port_number < 0) || (usb_port_number > 1))
- return -EINVAL;
- /* For all chips except 52XX there is only one port */
- if (!OCTEON_IS_MODEL(OCTEON_CN52XX) && (usb_port_number > 0))
- return -EINVAL;
- /* Try to determine clock type automatically */
- if (octeon_usb_get_clock_type() == USB_CLOCK_TYPE_CRYSTAL_12) {
- /* Only 12 MHZ crystals are supported */
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI;
- } else {
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND;
-
- switch (octeon_usb_get_clock_type()) {
- case USB_CLOCK_TYPE_REF_12:
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ;
- break;
- case USB_CLOCK_TYPE_REF_24:
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ;
- break;
- case USB_CLOCK_TYPE_REF_48:
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ;
- break;
- default:
- return -EINVAL;
- break;
- }
- }
-
- memset(usb, 0, sizeof(*usb));
- usb->init_flags = flags;
-
- /* Initialize the USB state structure */
- {
- int i;
- usb->index = usb_port_number;
-
- /* Initialize the transaction double linked list */
- usb->free_transaction_head = NULL;
- usb->free_transaction_tail = NULL;
- for (i = 0; i < MAX_TRANSACTIONS; i++)
- __cvmx_usb_free_transaction(usb, usb->transaction + i);
- for (i = 0; i < MAX_PIPES; i++)
- __cvmx_usb_append_pipe(&usb->free_pipes, usb->pipe + i);
- }
-
- /*
- * Power On Reset and PHY Initialization
- *
- * 1. Wait for DCOK to assert (nothing to do)
- *
- * 2a. Write USBN0/1_CLK_CTL[POR] = 1 and
- * USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0
- */
- usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
- usbn_clk_ctl.s.por = 1;
- usbn_clk_ctl.s.hrst = 0;
- usbn_clk_ctl.s.prst = 0;
- usbn_clk_ctl.s.hclk_rst = 0;
- usbn_clk_ctl.s.enable = 0;
- /*
- * 2b. Select the USB reference clock/crystal parameters by writing
- * appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON]
- */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) {
- /*
- * The USB port uses 12/24/48MHz 2.5V board clock
- * source at USB_XO. USB_XI should be tied to GND.
- * Most Octeon evaluation boards require this setting
- */
- if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
- /* From CN31XX,CN30XX manual */
- usbn_clk_ctl.cn31xx.p_rclk = 1;
- usbn_clk_ctl.cn31xx.p_xenbn = 0;
- } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
- /* From CN56XX,CN50XX manual */
- usbn_clk_ctl.cn56xx.p_rtype = 2;
- else
- /* From CN52XX manual */
- usbn_clk_ctl.cn52xx.p_rtype = 1;
-
- switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) {
- case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ:
- usbn_clk_ctl.s.p_c_sel = 0;
- break;
- case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ:
- usbn_clk_ctl.s.p_c_sel = 1;
- break;
- case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ:
- usbn_clk_ctl.s.p_c_sel = 2;
- break;
- }
- } else {
- /*
- * The USB port uses a 12MHz crystal as clock source
- * at USB_XO and USB_XI
- */
- if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
- /* From CN31XX,CN30XX manual */
- usbn_clk_ctl.cn31xx.p_rclk = 1;
- usbn_clk_ctl.cn31xx.p_xenbn = 1;
- } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
- /* From CN56XX,CN50XX manual */
- usbn_clk_ctl.cn56xx.p_rtype = 0;
- else
- /* From CN52XX manual */
- usbn_clk_ctl.cn52xx.p_rtype = 0;
-
- usbn_clk_ctl.s.p_c_sel = 0;
- }
- /*
- * 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and
- * setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down
- * such that USB is as close as possible to 125Mhz
- */
- {
- int divisor = (octeon_get_clock_rate()+125000000-1)/125000000;
- /* Lower than 4 doesn't seem to work properly */
- if (divisor < 4)
- divisor = 4;
- usbn_clk_ctl.s.divide = divisor;
- usbn_clk_ctl.s.divide2 = 0;
- }
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */
- usbn_clk_ctl.s.hclk_rst = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */
- cvmx_wait(64);
- /*
- * 3. Program the power-on reset field in the USBN clock-control
- * register:
- * USBN_CLK_CTL[POR] = 0
- */
- usbn_clk_ctl.s.por = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 4. Wait 1 ms for PHY clock to start */
- mdelay(1);
- /*
- * 5. Program the Reset input from automatic test equipment field in the
- * USBP control and status register:
- * USBN_USBP_CTL_STATUS[ATE_RESET] = 1
- */
- usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index));
- usbn_usbp_ctl_status.s.ate_reset = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
- usbn_usbp_ctl_status.u64);
- /* 6. Wait 10 cycles */
- cvmx_wait(10);
- /*
- * 7. Clear ATE_RESET field in the USBN clock-control register:
- * USBN_USBP_CTL_STATUS[ATE_RESET] = 0
- */
- usbn_usbp_ctl_status.s.ate_reset = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
- usbn_usbp_ctl_status.u64);
- /*
- * 8. Program the PHY reset field in the USBN clock-control register:
- * USBN_CLK_CTL[PRST] = 1
- */
- usbn_clk_ctl.s.prst = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /*
- * 9. Program the USBP control and status register to select host or
- * device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for
- * device
- */
- usbn_usbp_ctl_status.s.hst_mode = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
- usbn_usbp_ctl_status.u64);
- /* 10. Wait 1 us */
- udelay(1);
- /*
- * 11. Program the hreset_n field in the USBN clock-control register:
- * USBN_CLK_CTL[HRST] = 1
- */
- usbn_clk_ctl.s.hrst = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 12. Proceed to USB core initialization */
- usbn_clk_ctl.s.enable = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- udelay(1);
-
- /*
- * USB Core Initialization
- *
- * 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to
- * determine USB core configuration parameters.
- *
- * Nothing needed
- *
- * 2. Program the following fields in the global AHB configuration
- * register (USBC_GAHBCFG)
- * DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode
- * Burst length, USBC_GAHBCFG[HBSTLEN] = 0
- * Nonperiodic TxFIFO empty level (slave mode only),
- * USBC_GAHBCFG[NPTXFEMPLVL]
- * Periodic TxFIFO empty level (slave mode only),
- * USBC_GAHBCFG[PTXFEMPLVL]
- * Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1
- */
- {
- union cvmx_usbcx_gahbcfg usbcx_gahbcfg;
- /* Due to an errata, CN31XX doesn't support DMA */
- if (OCTEON_IS_MODEL(OCTEON_CN31XX))
- usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA;
- usbcx_gahbcfg.u32 = 0;
- usbcx_gahbcfg.s.dmaen = !(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA);
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- /* Only use one channel with non DMA */
- usb->idle_hardware_channels = 0x1;
- else if (OCTEON_IS_MODEL(OCTEON_CN5XXX))
- /* CN5XXX have an errata with channel 3 */
- usb->idle_hardware_channels = 0xf7;
- else
- usb->idle_hardware_channels = 0xff;
- usbcx_gahbcfg.s.hbstlen = 0;
- usbcx_gahbcfg.s.nptxfemplvl = 1;
- usbcx_gahbcfg.s.ptxfemplvl = 1;
- usbcx_gahbcfg.s.glblintrmsk = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index),
- usbcx_gahbcfg.u32);
- }
- /*
- * 3. Program the following fields in USBC_GUSBCFG register.
- * HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0
- * ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0
- * USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5
- * PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0
- */
- {
- union cvmx_usbcx_gusbcfg usbcx_gusbcfg;
- usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index));
- usbcx_gusbcfg.s.toutcal = 0;
- usbcx_gusbcfg.s.ddrsel = 0;
- usbcx_gusbcfg.s.usbtrdtim = 0x5;
- usbcx_gusbcfg.s.phylpwrclksel = 0;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index),
- usbcx_gusbcfg.u32);
- }
- /*
- * 4. The software must unmask the following bits in the USBC_GINTMSK
- * register.
- * OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1
- * Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1
- */
- {
- union cvmx_usbcx_gintmsk usbcx_gintmsk;
- int channel;
-
- usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index));
- usbcx_gintmsk.s.otgintmsk = 1;
- usbcx_gintmsk.s.modemismsk = 1;
- usbcx_gintmsk.s.hchintmsk = 1;
- usbcx_gintmsk.s.sofmsk = 0;
- /* We need RX FIFO interrupts if we don't have DMA */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- usbcx_gintmsk.s.rxflvlmsk = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index),
- usbcx_gintmsk.u32);
-
- /*
- * Disable all channel interrupts. We'll enable them per channel
- * later.
- */
- for (channel = 0; channel < 8; channel++)
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
- }
-
- {
- /*
- * Host Port Initialization
- *
- * 1. Program the host-port interrupt-mask field to unmask,
- * USBC_GINTMSK[PRTINT] = 1
- */
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk,
- prtintmsk, 1);
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk,
- disconnintmsk, 1);
- /*
- * 2. Program the USBC_HCFG register to select full-speed host
- * or high-speed host.
- */
- {
- union cvmx_usbcx_hcfg usbcx_hcfg;
- usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index));
- usbcx_hcfg.s.fslssupp = 0;
- usbcx_hcfg.s.fslspclksel = 0;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32);
- }
- /*
- * 3. Program the port power bit to drive VBUS on the USB,
- * USBC_HPRT[PRTPWR] = 1
- */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtpwr, 1);
-
- /*
- * Steps 4-15 from the manual are done later in the port enable
- */
- }
-
- return 0;
-}
-
-
-/**
- * Shutdown a USB port after a call to cvmx_usb_initialize().
- * The port should be disabled with all pipes closed when this
- * function is called.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_shutdown(struct cvmx_usb_state *state)
-{
- union cvmx_usbnx_clk_ctl usbn_clk_ctl;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- /* Make sure all pipes are closed */
- if (usb->idle_pipes.head ||
- usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS].head ||
- usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT].head ||
- usb->active_pipes[CVMX_USB_TRANSFER_CONTROL].head ||
- usb->active_pipes[CVMX_USB_TRANSFER_BULK].head)
- return -EBUSY;
-
- /* Disable the clocks and put them in power on reset */
- usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
- usbn_clk_ctl.s.enable = 1;
- usbn_clk_ctl.s.por = 1;
- usbn_clk_ctl.s.hclk_rst = 1;
- usbn_clk_ctl.s.prst = 0;
- usbn_clk_ctl.s.hrst = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- return 0;
-}
-
-
-/**
- * Enable a USB port. After this call succeeds, the USB port is
- * online and servicing requests.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_enable(struct cvmx_usb_state *state)
-{
- union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
-
- /*
- * If the port is already enabled the just return. We don't need to do
- * anything
- */
- if (usb->usbcx_hprt.s.prtena)
- return 0;
-
- /* If there is nothing plugged into the port then fail immediately */
- if (!usb->usbcx_hprt.s.prtconnsts) {
- return -ETIMEDOUT;
- }
-
- /* Program the port reset bit to start the reset process */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 1);
-
- /*
- * Wait at least 50ms (high speed), or 10ms (full speed) for the reset
- * process to complete.
- */
- mdelay(50);
-
- /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 0);
-
- /* Wait for the USBC_HPRT[PRTENA]. */
- if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt,
- prtena, ==, 1, 100000))
- return -ETIMEDOUT;
-
- /*
- * Read the port speed field to get the enumerated speed,
- * USBC_HPRT[PRTSPD].
- */
- usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
- usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index));
-
- /*
- * 13. Program the USBC_GRXFSIZ register to select the size of the
- * receive FIFO (25%).
- */
- USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), union cvmx_usbcx_grxfsiz,
- rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4);
- /*
- * 14. Program the USBC_GNPTXFSIZ register to select the size and the
- * start address of the non- periodic transmit FIFO for nonperiodic
- * transactions (50%).
- */
- {
- union cvmx_usbcx_gnptxfsiz siz;
- siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index));
- siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2;
- siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), siz.u32);
- }
- /*
- * 15. Program the USBC_HPTXFSIZ register to select the size and start
- * address of the periodic transmit FIFO for periodic transactions
- * (25%).
- */
- {
- union cvmx_usbcx_hptxfsiz siz;
- siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index));
- siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4;
- siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), siz.u32);
- }
- /* Flush all FIFOs */
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfnum, 0x10);
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfflsh, 1);
- CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl,
- txfflsh, ==, 0, 100);
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, rxfflsh, 1);
- CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl,
- rxfflsh, ==, 0, 100);
-
- return 0;
-}
-
-
-/**
- * Disable a USB port. After this call the USB port will not
- * generate data transfers and will not generate events.
- * Transactions in process will fail and call their
- * associated callbacks.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_disable(struct cvmx_usb_state *state)
-{
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- /* Disable the port */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtena, 1);
- return 0;
-}
-
-
-/**
- * Get the current state of the USB port. Use this call to
- * determine if the usb port has anything connected, is enabled,
- * or has some sort of error condition. The return value of this
- * call has "changed" bits to signal of the value of some fields
- * have changed between calls. These "changed" fields are based
- * on the last call to cvmx_usb_set_status(). In order to clear
- * them, you must update the status through cvmx_usb_set_status().
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: Port status information
- */
-struct cvmx_usb_port_status cvmx_usb_get_status(struct cvmx_usb_state *state)
-{
- union cvmx_usbcx_hprt usbc_hprt;
- struct cvmx_usb_port_status result;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- memset(&result, 0, sizeof(result));
-
- usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
- result.port_enabled = usbc_hprt.s.prtena;
- result.port_over_current = usbc_hprt.s.prtovrcurract;
- result.port_powered = usbc_hprt.s.prtpwr;
- result.port_speed = usbc_hprt.s.prtspd;
- result.connected = usbc_hprt.s.prtconnsts;
- result.connect_change = (result.connected != usb->port_status.connected);
-
- return result;
-}
-
-
-/**
- * Set the current state of the USB port. The status is used as
- * a reference for the "changed" bits returned by
- * cvmx_usb_get_status(). Other than serving as a reference, the
- * status passed to this function is not used. No fields can be
- * changed through this call.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @port_status:
- * Port status to set, most like returned by cvmx_usb_get_status()
- */
-void cvmx_usb_set_status(struct cvmx_usb_state *state, struct cvmx_usb_port_status port_status)
-{
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
- usb->port_status = port_status;
- return;
-}
-
-
-/**
- * Convert a USB transaction into a handle
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @transaction:
- * Transaction to get handle for
- *
- * Returns: Handle
- */
-static inline int __cvmx_usb_get_submit_handle(struct cvmx_usb_internal_state *usb,
- struct cvmx_usb_transaction *transaction)
-{
- return ((unsigned long)transaction - (unsigned long)usb->transaction) /
- sizeof(*transaction);
-}
-
-
-/**
- * Convert a USB pipe into a handle
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe: Pipe to get handle for
- *
- * Returns: Handle
- */
-static inline int __cvmx_usb_get_pipe_handle(struct cvmx_usb_internal_state *usb,
- struct cvmx_usb_pipe *pipe)
-{
- return ((unsigned long)pipe - (unsigned long)usb->pipe) / sizeof(*pipe);
-}
-
-
-/**
- * Open a virtual pipe between the host and a USB device. A pipe
- * must be opened before data can be transferred between a device
- * and Octeon.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @device_addr:
- * USB device address to open the pipe to
- * (0-127).
- * @endpoint_num:
- * USB endpoint number to open the pipe to
- * (0-15).
- * @device_speed:
- * The speed of the device the pipe is going
- * to. This must match the device's speed,
- * which may be different than the port speed.
- * @max_packet: The maximum packet length the device can
- * transmit/receive (low speed=0-8, full
- * speed=0-1023, high speed=0-1024). This value
- * comes from the standard endpoint descriptor
- * field wMaxPacketSize bits <10:0>.
- * @transfer_type:
- * The type of transfer this pipe is for.
- * @transfer_dir:
- * The direction the pipe is in. This is not
- * used for control pipes.
- * @interval: For ISOCHRONOUS and INTERRUPT transfers,
- * this is how often the transfer is scheduled
- * for. All other transfers should specify
- * zero. The units are in frames (8000/sec at
- * high speed, 1000/sec for full speed).
- * @multi_count:
- * For high speed devices, this is the maximum
- * allowed number of packet per microframe.
- * Specify zero for non high speed devices. This
- * value comes from the standard endpoint descriptor
- * field wMaxPacketSize bits <12:11>.
- * @hub_device_addr:
- * Hub device address this device is connected
- * to. Devices connected directly to Octeon
- * use zero. This is only used when the device
- * is full/low speed behind a high speed hub.
- * The address will be of the high speed hub,
- * not and full speed hubs after it.
- * @hub_port: Which port on the hub the device is
- * connected. Use zero for devices connected
- * directly to Octeon. Like hub_device_addr,
- * this is only used for full/low speed
- * devices behind a high speed hub.
- *
- * Returns: A non negative value is a pipe handle. Negative
- * values are error codes.
- */
-int cvmx_usb_open_pipe(struct cvmx_usb_state *state,
- int device_addr, int endpoint_num,
- enum cvmx_usb_speed device_speed, int max_packet,
- enum cvmx_usb_transfer transfer_type,
- enum cvmx_usb_direction transfer_dir, int interval,
- int multi_count, int hub_device_addr, int hub_port)
-{
- struct cvmx_usb_pipe *pipe;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS)))
- return -EINVAL;
- if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT)))
- return -EINVAL;
- if (unlikely(device_speed > CVMX_USB_SPEED_LOW))
- return -EINVAL;
- if (unlikely((max_packet <= 0) || (max_packet > 1024)))
- return -EINVAL;
- if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT))
- return -EINVAL;
- if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) &&
- (transfer_dir != CVMX_USB_DIRECTION_IN)))
- return -EINVAL;
- if (unlikely(interval < 0))
- return -EINVAL;
- if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval))
- return -EINVAL;
- if (unlikely(multi_count < 0))
- return -EINVAL;
- if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) &&
- (multi_count != 0)))
- return -EINVAL;
- if (unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS)))
- return -EINVAL;
- if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT)))
- return -EINVAL;
-
- /* Find a free pipe */
- pipe = usb->free_pipes.head;
- if (!pipe)
- return -ENOMEM;
- __cvmx_usb_remove_pipe(&usb->free_pipes, pipe);
- pipe->flags = __CVMX_USB_PIPE_FLAGS_OPEN;
- if ((device_speed == CVMX_USB_SPEED_HIGH) &&
- (transfer_dir == CVMX_USB_DIRECTION_OUT) &&
- (transfer_type == CVMX_USB_TRANSFER_BULK))
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
- pipe->device_addr = device_addr;
- pipe->endpoint_num = endpoint_num;
- pipe->device_speed = device_speed;
- pipe->max_packet = max_packet;
- pipe->transfer_type = transfer_type;
- pipe->transfer_dir = transfer_dir;
- /*
- * All pipes use interval to rate limit NAK processing. Force an
- * interval if one wasn't supplied
- */
- if (!interval)
- interval = 1;
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- pipe->interval = interval*8;
- /* Force start splits to be schedule on uFrame 0 */
- pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval;
- } else {
- pipe->interval = interval;
- pipe->next_tx_frame = usb->frame_number + pipe->interval;
- }
- pipe->multi_count = multi_count;
- pipe->hub_device_addr = hub_device_addr;
- pipe->hub_port = hub_port;
- pipe->pid_toggle = 0;
- pipe->split_sc_frame = -1;
- __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
-
- /*
- * We don't need to tell the hardware about this pipe yet since
- * it doesn't have any submitted requests
- */
-
- return __cvmx_usb_get_pipe_handle(usb, pipe);
-}
-
-
-/**
- * Poll the RX FIFOs and remove data as needed. This function is only used
- * in non DMA mode. It is very important that this function be called quickly
- * enough to prevent FIFO overflow.
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- */
-static void __cvmx_usb_poll_rx_fifo(struct cvmx_usb_internal_state *usb)
-{
- union cvmx_usbcx_grxstsph rx_status;
- int channel;
- int bytes;
- uint64_t address;
- uint32_t *ptr;
-
- rx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GRXSTSPH(usb->index));
- /* Only read data if IN data is there */
- if (rx_status.s.pktsts != 2)
- return;
- /* Check if no data is available */
- if (!rx_status.s.bcnt)
- return;
-
- channel = rx_status.s.chnum;
- bytes = rx_status.s.bcnt;
- if (!bytes)
- return;
-
- /* Get where the DMA engine would have written this data */
- address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8);
- ptr = cvmx_phys_to_ptr(address);
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes);
-
- /* Loop writing the FIFO data for this packet into memory */
- while (bytes > 0) {
- *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index));
- bytes -= 4;
- }
- CVMX_SYNCW;
-
- return;
-}
-
-
-/**
- * Fill the TX hardware fifo with data out of the software
- * fifos
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @fifo: Software fifo to use
- * @available: Amount of space in the hardware fifo
- *
- * Returns: Non zero if the hardware fifo was too small and needs
- * to be serviced again.
- */
-static int __cvmx_usb_fill_tx_hw(struct cvmx_usb_internal_state *usb, struct cvmx_usb_tx_fifo *fifo, int available)
-{
- /*
- * We're done either when there isn't anymore space or the software FIFO
- * is empty
- */
- while (available && (fifo->head != fifo->tail)) {
- int i = fifo->tail;
- const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address);
- uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, usb->index) ^ 4;
- int words = available;
-
- /* Limit the amount of data to waht the SW fifo has */
- if (fifo->entry[i].size <= available) {
- words = fifo->entry[i].size;
- fifo->tail++;
- if (fifo->tail > MAX_CHANNELS)
- fifo->tail = 0;
- }
-
- /* Update the next locations and counts */
- available -= words;
- fifo->entry[i].address += words * 4;
- fifo->entry[i].size -= words;
-
- /*
- * Write the HW fifo data. The read every three writes is due
- * to an errata on CN3XXX chips
- */
- while (words > 3) {
- cvmx_write64_uint32(csr_address, *ptr++);
- cvmx_write64_uint32(csr_address, *ptr++);
- cvmx_write64_uint32(csr_address, *ptr++);
- cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
- words -= 3;
- }
- cvmx_write64_uint32(csr_address, *ptr++);
- if (--words) {
- cvmx_write64_uint32(csr_address, *ptr++);
- if (--words)
- cvmx_write64_uint32(csr_address, *ptr++);
- }
- cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
- }
- return fifo->head != fifo->tail;
-}
-
-
-/**
- * Check the hardware FIFOs and fill them as needed
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- */
-static void __cvmx_usb_poll_tx_fifo(struct cvmx_usb_internal_state *usb)
-{
- if (usb->periodic.head != usb->periodic.tail) {
- union cvmx_usbcx_hptxsts tx_status;
- tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXSTS(usb->index));
- if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, tx_status.s.ptxfspcavail))
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 1);
- else
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 0);
- }
-
- if (usb->nonperiodic.head != usb->nonperiodic.tail) {
- union cvmx_usbcx_gnptxsts tx_status;
- tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXSTS(usb->index));
- if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, tx_status.s.nptxfspcavail))
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 1);
- else
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 0);
- }
-
- return;
-}
-
-
-/**
- * Fill the TX FIFO with an outgoing packet
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @channel: Channel number to get packet from
- */
-static void __cvmx_usb_fill_tx_fifo(struct cvmx_usb_internal_state *usb, int channel)
-{
- union cvmx_usbcx_hccharx hcchar;
- union cvmx_usbcx_hcspltx usbc_hcsplt;
- union cvmx_usbcx_hctsizx usbc_hctsiz;
- struct cvmx_usb_tx_fifo *fifo;
-
- /* We only need to fill data on outbound channels */
- hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
- if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT)
- return;
-
- /* OUT Splits only have data on the start and not the complete */
- usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index));
- if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt)
- return;
-
- /*
- * Find out how many bytes we need to fill and convert it into 32bit
- * words.
- */
- usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
- if (!usbc_hctsiz.s.xfersize)
- return;
-
- if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) ||
- (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS))
- fifo = &usb->periodic;
- else
- fifo = &usb->nonperiodic;
-
- fifo->entry[fifo->head].channel = channel;
- fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8);
- fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2;
- fifo->head++;
- if (fifo->head > MAX_CHANNELS)
- fifo->head = 0;
-
- __cvmx_usb_poll_tx_fifo(usb);
-
- return;
-}
-
-/**
- * Perform channel specific setup for Control transactions. All
- * the generic stuff will already have been done in
- * __cvmx_usb_start_channel()
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @channel: Channel to setup
- * @pipe: Pipe for control transaction
- */
-static void __cvmx_usb_start_channel_control(struct cvmx_usb_internal_state *usb,
- int channel,
- struct cvmx_usb_pipe *pipe)
-{
- struct cvmx_usb_transaction *transaction = pipe->head;
- union cvmx_usb_control_header *header =
- cvmx_phys_to_ptr(transaction->control_header);
- int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
- int packets_to_transfer;
- union cvmx_usbcx_hctsizx usbc_hctsiz;
-
- usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
-
- switch (transaction->stage) {
- case CVMX_USB_STAGE_NON_CONTROL:
- case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
- cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__);
- break;
- case CVMX_USB_STAGE_SETUP:
- usbc_hctsiz.s.pid = 3; /* Setup */
- bytes_to_transfer = sizeof(*header);
- /* All Control operations start with a setup going OUT */
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT);
- /*
- * Setup send the control header instead of the buffer data. The
- * buffer data will be used in the next stage
- */
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header);
- break;
- case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
- usbc_hctsiz.s.pid = 3; /* Setup */
- bytes_to_transfer = 0;
- /* All Control operations start with a setup going OUT */
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT);
- USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1);
- break;
- case CVMX_USB_STAGE_DATA:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- if (header->s.request_type & 0x80)
- bytes_to_transfer = 0;
- else if (bytes_to_transfer > pipe->max_packet)
- bytes_to_transfer = pipe->max_packet;
- }
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
- union cvmx_usbcx_hccharx, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_IN :
- CVMX_USB_DIRECTION_OUT));
- break;
- case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- if (!(header->s.request_type & 0x80))
- bytes_to_transfer = 0;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
- union cvmx_usbcx_hccharx, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_IN :
- CVMX_USB_DIRECTION_OUT));
- USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1);
- break;
- case CVMX_USB_STAGE_STATUS:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- bytes_to_transfer = 0;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_OUT :
- CVMX_USB_DIRECTION_IN));
- break;
- case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- bytes_to_transfer = 0;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_OUT :
- CVMX_USB_DIRECTION_IN));
- USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1);
- break;
- }
-
- /*
- * Make sure the transfer never exceeds the byte limit of the hardware.
- * Further bytes will be sent as continued transactions
- */
- if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
- /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */
- bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
- bytes_to_transfer *= pipe->max_packet;
- }
-
- /*
- * Calculate the number of packets to transfer. If the length is zero
- * we still need to transfer one packet
- */
- packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
- if (packets_to_transfer == 0)
- packets_to_transfer = 1;
- else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
- /*
- * Limit to one packet when not using DMA. Channels must be
- * restarted between every packet for IN transactions, so there
- * is no reason to do multiple packets in a row
- */
- packets_to_transfer = 1;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
- /*
- * Limit the number of packet and data transferred to what the
- * hardware can handle
- */
- packets_to_transfer = MAX_TRANSFER_PACKETS;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- }
-
- usbc_hctsiz.s.xfersize = bytes_to_transfer;
- usbc_hctsiz.s.pktcnt = packets_to_transfer;
-
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
- return;
-}
-
-
-/**
- * Start a channel to perform the pipe's head transaction
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @channel: Channel to setup
- * @pipe: Pipe to start
- */
-static void __cvmx_usb_start_channel(struct cvmx_usb_internal_state *usb,
- int channel,
- struct cvmx_usb_pipe *pipe)
-{
- struct cvmx_usb_transaction *transaction = pipe->head;
-
- /* Make sure all writes to the DMA region get flushed */
- CVMX_SYNCW;
-
- /* Attach the channel to the pipe */
- usb->pipe_for_channel[channel] = pipe;
- pipe->channel = channel;
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED;
-
- /* Mark this channel as in use */
- usb->idle_hardware_channels &= ~(1<<channel);
-
- /* Enable the channel interrupt bits */
- {
- union cvmx_usbcx_hcintx usbc_hcint;
- union cvmx_usbcx_hcintmskx usbc_hcintmsk;
- union cvmx_usbcx_haintmsk usbc_haintmsk;
-
- /* Clear all channel status bits */
- usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index), usbc_hcint.u32);
-
- usbc_hcintmsk.u32 = 0;
- usbc_hcintmsk.s.chhltdmsk = 1;
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
- /*
- * Channels need these extra interrupts when we aren't
- * in DMA mode.
- */
- usbc_hcintmsk.s.datatglerrmsk = 1;
- usbc_hcintmsk.s.frmovrunmsk = 1;
- usbc_hcintmsk.s.bblerrmsk = 1;
- usbc_hcintmsk.s.xacterrmsk = 1;
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /*
- * Splits don't generate xfercompl, so we need
- * ACK and NYET.
- */
- usbc_hcintmsk.s.nyetmsk = 1;
- usbc_hcintmsk.s.ackmsk = 1;
- }
- usbc_hcintmsk.s.nakmsk = 1;
- usbc_hcintmsk.s.stallmsk = 1;
- usbc_hcintmsk.s.xfercomplmsk = 1;
- }
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32);
-
- /* Enable the channel interrupt to propagate */
- usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index));
- usbc_haintmsk.s.haintmsk |= 1<<channel;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32);
- }
-
- /* Setup the locations the DMA engines use */
- {
- uint64_t dma_address = transaction->buffer + transaction->actual_bytes;
- if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
- dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address);
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address);
- }
-
- /* Setup both the size of the transfer and the SPLIT characteristics */
- {
- union cvmx_usbcx_hcspltx usbc_hcsplt = {.u32 = 0};
- union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = 0};
- int packets_to_transfer;
- int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
-
- /*
- * ISOCHRONOUS transactions store each individual transfer size
- * in the packet structure, not the global buffer_length
- */
- if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
- bytes_to_transfer = transaction->iso_packets[0].length - transaction->actual_bytes;
-
- /*
- * We need to do split transactions when we are talking to non
- * high speed devices that are behind a high speed hub
- */
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /*
- * On the start split phase (stage is even) record the
- * frame number we will need to send the split complete.
- * We only store the lower two bits since the time ahead
- * can only be two frames
- */
- if ((transaction->stage&1) == 0) {
- if (transaction->type == CVMX_USB_TRANSFER_BULK)
- pipe->split_sc_frame = (usb->frame_number + 1) & 0x7f;
- else
- pipe->split_sc_frame = (usb->frame_number + 2) & 0x7f;
- } else
- pipe->split_sc_frame = -1;
-
- usbc_hcsplt.s.spltena = 1;
- usbc_hcsplt.s.hubaddr = pipe->hub_device_addr;
- usbc_hcsplt.s.prtaddr = pipe->hub_port;
- usbc_hcsplt.s.compsplt = (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE);
-
- /*
- * SPLIT transactions can only ever transmit one data
- * packet so limit the transfer size to the max packet
- * size
- */
- if (bytes_to_transfer > pipe->max_packet)
- bytes_to_transfer = pipe->max_packet;
-
- /*
- * ISOCHRONOUS OUT splits are unique in that they limit
- * data transfers to 188 byte chunks representing the
- * begin/middle/end of the data or all
- */
- if (!usbc_hcsplt.s.compsplt &&
- (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
- (pipe->transfer_type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
- /*
- * Clear the split complete frame number as
- * there isn't going to be a split complete
- */
- pipe->split_sc_frame = -1;
- /*
- * See if we've started this transfer and sent
- * data
- */
- if (transaction->actual_bytes == 0) {
- /*
- * Nothing sent yet, this is either a
- * begin or the entire payload
- */
- if (bytes_to_transfer <= 188)
- /* Entire payload in one go */
- usbc_hcsplt.s.xactpos = 3;
- else
- /* First part of payload */
- usbc_hcsplt.s.xactpos = 2;
- } else {
- /*
- * Continuing the previous data, we must
- * either be in the middle or at the end
- */
- if (bytes_to_transfer <= 188)
- /* End of payload */
- usbc_hcsplt.s.xactpos = 1;
- else
- /* Middle of payload */
- usbc_hcsplt.s.xactpos = 0;
- }
- /*
- * Again, the transfer size is limited to 188
- * bytes
- */
- if (bytes_to_transfer > 188)
- bytes_to_transfer = 188;
- }
- }
-
- /*
- * Make sure the transfer never exceeds the byte limit of the
- * hardware. Further bytes will be sent as continued
- * transactions
- */
- if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
- /*
- * Round MAX_TRANSFER_BYTES to a multiple of out packet
- * size
- */
- bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
- bytes_to_transfer *= pipe->max_packet;
- }
-
- /*
- * Calculate the number of packets to transfer. If the length is
- * zero we still need to transfer one packet
- */
- packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
- if (packets_to_transfer == 0)
- packets_to_transfer = 1;
- else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
- /*
- * Limit to one packet when not using DMA. Channels must
- * be restarted between every packet for IN
- * transactions, so there is no reason to do multiple
- * packets in a row
- */
- packets_to_transfer = 1;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
- /*
- * Limit the number of packet and data transferred to
- * what the hardware can handle
- */
- packets_to_transfer = MAX_TRANSFER_PACKETS;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- }
-
- usbc_hctsiz.s.xfersize = bytes_to_transfer;
- usbc_hctsiz.s.pktcnt = packets_to_transfer;
-
- /* Update the DATA0/DATA1 toggle */
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- /*
- * High speed pipes may need a hardware ping before they start
- */
- if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING)
- usbc_hctsiz.s.dopng = 1;
-
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index), usbc_hcsplt.u32);
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
- }
-
- /* Setup the Host Channel Characteristics Register */
- {
- union cvmx_usbcx_hccharx usbc_hcchar = {.u32 = 0};
-
- /*
- * Set the startframe odd/even properly. This is only used for
- * periodic
- */
- usbc_hcchar.s.oddfrm = usb->frame_number&1;
-
- /*
- * Set the number of back to back packets allowed by this
- * endpoint. Split transactions interpret "ec" as the number of
- * immediate retries of failure. These retries happen too
- * quickly, so we disable these entirely for splits
- */
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- usbc_hcchar.s.ec = 1;
- else if (pipe->multi_count < 1)
- usbc_hcchar.s.ec = 1;
- else if (pipe->multi_count > 3)
- usbc_hcchar.s.ec = 3;
- else
- usbc_hcchar.s.ec = pipe->multi_count;
-
- /* Set the rest of the endpoint specific settings */
- usbc_hcchar.s.devaddr = pipe->device_addr;
- usbc_hcchar.s.eptype = transaction->type;
- usbc_hcchar.s.lspddev = (pipe->device_speed == CVMX_USB_SPEED_LOW);
- usbc_hcchar.s.epdir = pipe->transfer_dir;
- usbc_hcchar.s.epnum = pipe->endpoint_num;
- usbc_hcchar.s.mps = pipe->max_packet;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
- }
-
- /* Do transaction type specific fixups as needed */
- switch (transaction->type) {
- case CVMX_USB_TRANSFER_CONTROL:
- __cvmx_usb_start_channel_control(usb, channel, pipe);
- break;
- case CVMX_USB_TRANSFER_BULK:
- case CVMX_USB_TRANSFER_INTERRUPT:
- break;
- case CVMX_USB_TRANSFER_ISOCHRONOUS:
- if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /*
- * ISO transactions require different PIDs depending on
- * direction and how many packets are needed
- */
- if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
- if (pipe->multi_count < 2) /* Need DATA0 */
- USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 0);
- else /* Need MDATA */
- USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 3);
- }
- }
- break;
- }
- {
- union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index))};
- transaction->xfersize = usbc_hctsiz.s.xfersize;
- transaction->pktcnt = usbc_hctsiz.s.pktcnt;
- }
- /* Remeber when we start a split transaction */
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- usb->active_split = transaction;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, chena, 1);
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- __cvmx_usb_fill_tx_fifo(usb, channel);
- return;
-}
-
-
-/**
- * Find a pipe that is ready to be scheduled to hardware.
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @list: Pipe list to search
- * @current_frame:
- * Frame counter to use as a time reference.
- *
- * Returns: Pipe or NULL if none are ready
- */
-static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_internal_state *usb, struct cvmx_usb_pipe_list *list, uint64_t current_frame)
-{
- struct cvmx_usb_pipe *pipe = list->head;
- while (pipe) {
- if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head &&
- (pipe->next_tx_frame <= current_frame) &&
- ((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) &&
- (!usb->active_split || (usb->active_split == pipe->head))) {
- CVMX_PREFETCH(pipe, 128);
- CVMX_PREFETCH(pipe->head, 0);
- return pipe;
- }
- pipe = pipe->next;
- }
- return NULL;
-}
-
-
-/**
- * Called whenever a pipe might need to be scheduled to the
- * hardware.
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @is_sof: True if this schedule was called on a SOF interrupt.
- */
-static void __cvmx_usb_schedule(struct cvmx_usb_internal_state *usb, int is_sof)
-{
- int channel;
- struct cvmx_usb_pipe *pipe;
- int need_sof;
- enum cvmx_usb_transfer ttype;
-
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
- /*
- * Without DMA we need to be careful to not schedule something
- * at the end of a frame and cause an overrun.
- */
- union cvmx_usbcx_hfnum hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))};
- union cvmx_usbcx_hfir hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))};
- if (hfnum.s.frrem < hfir.s.frint/4)
- goto done;
- }
-
- while (usb->idle_hardware_channels) {
- /* Find an idle channel */
- channel = __fls(usb->idle_hardware_channels);
- if (unlikely(channel > 7))
- break;
-
- /* Find a pipe needing service */
- pipe = NULL;
- if (is_sof) {
- /*
- * Only process periodic pipes on SOF interrupts. This
- * way we are sure that the periodic data is sent in the
- * beginning of the frame
- */
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_ISOCHRONOUS, usb->frame_number);
- if (likely(!pipe))
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_INTERRUPT, usb->frame_number);
- }
- if (likely(!pipe)) {
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_CONTROL, usb->frame_number);
- if (likely(!pipe))
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_BULK, usb->frame_number);
- }
- if (!pipe)
- break;
-
- __cvmx_usb_start_channel(usb, channel, pipe);
- }
-
-done:
- /*
- * Only enable SOF interrupts when we have transactions pending in the
- * future that might need to be scheduled
- */
- need_sof = 0;
- for (ttype = CVMX_USB_TRANSFER_CONTROL; ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) {
- pipe = usb->active_pipes[ttype].head;
- while (pipe) {
- if (pipe->next_tx_frame > usb->frame_number) {
- need_sof = 1;
- break;
- }
- pipe = pipe->next;
- }
- }
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, sofmsk, need_sof);
- return;
-}
-
-
-/**
- * Call a user's callback for a specific reason.
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe: Pipe the callback is for or NULL
- * @transaction:
- * Transaction the callback is for or NULL
- * @reason: Reason this callback is being called
- * @complete_code:
- * Completion code for the transaction, if any
- */
-static void __cvmx_usb_perform_callback(struct cvmx_usb_internal_state *usb,
- struct cvmx_usb_pipe *pipe,
- struct cvmx_usb_transaction *transaction,
- enum cvmx_usb_callback reason,
- enum cvmx_usb_complete complete_code)
-{
- cvmx_usb_callback_func_t callback = usb->callback[reason];
- void *user_data = usb->callback_data[reason];
- int submit_handle = -1;
- int pipe_handle = -1;
- int bytes_transferred = 0;
-
- if (pipe)
- pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);
-
- if (transaction) {
- submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
- bytes_transferred = transaction->actual_bytes;
- /* Transactions are allowed to override the default callback */
- if ((reason == CVMX_USB_CALLBACK_TRANSFER_COMPLETE) && transaction->callback) {
- callback = transaction->callback;
- user_data = transaction->callback_data;
- }
- }
-
- if (!callback)
- return;
-
- callback((struct cvmx_usb_state *)usb, reason, complete_code, pipe_handle, submit_handle,
- bytes_transferred, user_data);
-}
-
-
-/**
- * Signal the completion of a transaction and free it. The
- * transaction will be removed from the pipe transaction list.
- *
- * @usb: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe: Pipe the transaction is on
- * @transaction:
- * Transaction that completed
- * @complete_code:
- * Completion code
- */
-static void __cvmx_usb_perform_complete(struct cvmx_usb_internal_state *usb,
- struct cvmx_usb_pipe *pipe,
- struct cvmx_usb_transaction *transaction,
- enum cvmx_usb_complete complete_code)
-{
- /* If this was a split then clear our split in progress marker */
- if (usb->active_split == transaction)
- usb->active_split = NULL;
-
- /*
- * Isochronous transactions need extra processing as they might not be
- * done after a single data transfer
- */
- if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
- /* Update the number of bytes transferred in this ISO packet */
- transaction->iso_packets[0].length = transaction->actual_bytes;
- transaction->iso_packets[0].status = complete_code;
-
- /*
- * If there are more ISOs pending and we succeeded, schedule the
- * next one
- */
- if ((transaction->iso_number_packets > 1) && (complete_code == CVMX_USB_COMPLETE_SUCCESS)) {
- /* No bytes transferred for this packet as of yet */
- transaction->actual_bytes = 0;
- /* One less ISO waiting to transfer */
- transaction->iso_number_packets--;
- /* Increment to the next location in our packet array */
- transaction->iso_packets++;
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
- goto done;
- }
- }
-
- /* Remove the transaction from the pipe list */
- if (transaction->next)
- transaction->next->prev = transaction->prev;
- else
- pipe->tail = transaction->prev;
- if (transaction->prev)
- transaction->prev->next = transaction->next;
- else
- pipe->head = transaction->next;
- if (!pipe->head) {
- __cvmx_usb_remove_pipe(usb->active_pipes + pipe->transfer_type, pipe);
- __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
-
- }
- __cvmx_usb_perform_callback(usb, pipe, transaction,
- CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
- complete_code);
- __cvmx_usb_free_transaction(usb, transaction);
-done:
- return;
-}
-
-
-/**
- * Submit a usb transaction to a pipe. Called for all types
- * of transactions.
- *
- * @usb:
- * @pipe_handle:
- * Which pipe to submit to. Will be validated in this function.
- * @type: Transaction type
- * @buffer: User buffer for the transaction
- * @buffer_length:
- * User buffer's length in bytes
- * @control_header:
- * For control transactions, the 8 byte standard header
- * @iso_start_frame:
- * For ISO transactions, the start frame
- * @iso_number_packets:
- * For ISO, the number of packet in the transaction.
- * @iso_packets:
- * A description of each ISO packet
- * @callback: User callback to call when the transaction completes
- * @user_data: User's data for the callback
- *
- * Returns: Submit handle or negative on failure. Matches the result
- * in the external API.
- */
-static int __cvmx_usb_submit_transaction(struct cvmx_usb_internal_state *usb,
- int pipe_handle,
- enum cvmx_usb_transfer type,
- uint64_t buffer,
- int buffer_length,
- uint64_t control_header,
- int iso_start_frame,
- int iso_number_packets,
- struct cvmx_usb_iso_packet *iso_packets,
- cvmx_usb_callback_func_t callback,
- void *user_data)
-{
- int submit_handle;
- struct cvmx_usb_transaction *transaction;
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
- if (unlikely(pipe->transfer_type != type))
- return -EINVAL;
-
- transaction = __cvmx_usb_alloc_transaction(usb);
- if (unlikely(!transaction))
- return -ENOMEM;
-
- transaction->type = type;
- transaction->buffer = buffer;
- transaction->buffer_length = buffer_length;
- transaction->control_header = control_header;
- /* FIXME: This is not used, implement it. */
- transaction->iso_start_frame = iso_start_frame;
- transaction->iso_number_packets = iso_number_packets;
- transaction->iso_packets = iso_packets;
- transaction->callback = callback;
- transaction->callback_data = user_data;
- if (transaction->type == CVMX_USB_TRANSFER_CONTROL)
- transaction->stage = CVMX_USB_STAGE_SETUP;
- else
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
-
- transaction->next = NULL;
- if (pipe->tail) {
- transaction->prev = pipe->tail;
- transaction->prev->next = transaction;
- } else {
- if (pipe->next_tx_frame < usb->frame_number)
- pipe->next_tx_frame = usb->frame_number + pipe->interval -
- (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
- transaction->prev = NULL;
- pipe->head = transaction;
- __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
- __cvmx_usb_append_pipe(usb->active_pipes + pipe->transfer_type, pipe);
- }
- pipe->tail = transaction;
-
- submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
-
- /* We may need to schedule the pipe if this was the head of the pipe */
- if (!transaction->prev)
- __cvmx_usb_schedule(usb, 0);
-
- return submit_handle;
-}
-
-
-/**
- * Call to submit a USB Bulk transfer to a pipe.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
- * @buffer: Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
- * @buffer_length:
- * Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
- * @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
- *
- * Returns: A submitted transaction handle or negative on
- * failure. Negative values are error codes.
- */
-int cvmx_usb_submit_bulk(struct cvmx_usb_state *state, int pipe_handle,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
-{
- int submit_handle;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(!buffer))
- return -EINVAL;
- if (unlikely(buffer_length < 0))
- return -EINVAL;
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_BULK,
- buffer,
- buffer_length,
- 0, /* control_header */
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- callback,
- user_data);
- return submit_handle;
-}
-
-
-/**
- * Call to submit a USB Interrupt transfer to a pipe.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
- * @buffer: Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
- * @buffer_length:
- * Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
- * @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
- *
- * Returns: A submitted transaction handle or negative on
- * failure. Negative values are error codes.
- */
-int cvmx_usb_submit_interrupt(struct cvmx_usb_state *state, int pipe_handle,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
-{
- int submit_handle;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(!buffer))
- return -EINVAL;
- if (unlikely(buffer_length < 0))
- return -EINVAL;
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_INTERRUPT,
- buffer,
- buffer_length,
- 0, /* control_header */
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- callback,
- user_data);
- return submit_handle;
-}
-
-
-/**
- * Call to submit a USB Control transfer to a pipe.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
- * @control_header:
- * USB 8 byte control header physical address.
- * Note that this is NOT A POINTER, but the
- * full 64bit physical address of the buffer.
- * @buffer: Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
- * @buffer_length:
- * Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
- * @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
- *
- * Returns: A submitted transaction handle or negative on
- * failure. Negative values are error codes.
- */
-int cvmx_usb_submit_control(struct cvmx_usb_state *state, int pipe_handle,
- uint64_t control_header,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
-{
- int submit_handle;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
- union cvmx_usb_control_header *header =
- cvmx_phys_to_ptr(control_header);
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(!control_header))
- return -EINVAL;
- /* Some drivers send a buffer with a zero length. God only knows why */
- if (unlikely(buffer && (buffer_length < 0)))
- return -EINVAL;
- if (unlikely(!buffer && (buffer_length != 0)))
- return -EINVAL;
- if ((header->s.request_type & 0x80) == 0)
- buffer_length = le16_to_cpu(header->s.length);
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_CONTROL,
- buffer,
- buffer_length,
- control_header,
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- callback,
- user_data);
- return submit_handle;
-}
-
-
-/**
- * Call to submit a USB Isochronous transfer to a pipe.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe_handle:
- * Handle to the pipe for the transfer.
- * @start_frame:
- * Number of frames into the future to schedule
- * this transaction.
- * @number_packets:
- * Number of sequential packets to transfer.
- * "packets" is a pointer to an array of this
- * many packet structures.
- * @packets: Description of each transfer packet as
- * defined by struct cvmx_usb_iso_packet. The array
- * pointed to here must stay valid until the
- * complete callback is called.
- * @buffer: Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
- * @buffer_length:
- * Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
- * @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
- *
- * Returns: A submitted transaction handle or negative on
- * failure. Negative values are error codes.
- */
-int cvmx_usb_submit_isochronous(struct cvmx_usb_state *state, int pipe_handle,
- int start_frame,
- int number_packets,
- struct cvmx_usb_iso_packet packets[],
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
-{
- int submit_handle;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(start_frame < 0))
- return -EINVAL;
- if (unlikely(number_packets < 1))
- return -EINVAL;
- if (unlikely(!packets))
- return -EINVAL;
- if (unlikely(!buffer))
- return -EINVAL;
- if (unlikely(buffer_length < 0))
- return -EINVAL;
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_ISOCHRONOUS,
- buffer,
- buffer_length,
- 0, /* control_header */
- start_frame,
- number_packets,
- packets,
- callback,
- user_data);
- return submit_handle;
-}
-
-
-/**
- * Cancel one outstanding request in a pipe. Canceling a request
- * can fail if the transaction has already completed before cancel
- * is called. Even after a successful cancel call, it may take
- * a frame or two for the cvmx_usb_poll() function to call the
- * associated callback.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe_handle:
- * Pipe handle to cancel requests in.
- * @submit_handle:
- * Handle to transaction to cancel, returned by the submit
- * function.
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_cancel(struct cvmx_usb_state *state, int pipe_handle, int submit_handle)
-{
- struct cvmx_usb_transaction *transaction;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
- if (unlikely((submit_handle < 0) || (submit_handle >= MAX_TRANSACTIONS)))
- return -EINVAL;
-
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
-
- transaction = usb->transaction + submit_handle;
-
- /* Fail if this transaction already completed */
- if (unlikely((transaction->flags & __CVMX_USB_TRANSACTION_FLAGS_IN_USE) == 0))
- return -EINVAL;
-
- /*
- * If the transaction is the HEAD of the queue and scheduled. We need to
- * treat it special
- */
- if ((pipe->head == transaction) &&
- (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) {
- union cvmx_usbcx_hccharx usbc_hcchar;
-
- usb->pipe_for_channel[pipe->channel] = NULL;
- pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
-
- CVMX_SYNCW;
-
- usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index));
- /*
- * If the channel isn't enabled then the transaction already
- * completed.
- */
- if (usbc_hcchar.s.chena) {
- usbc_hcchar.s.chdis = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index), usbc_hcchar.u32);
- }
- }
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_CANCEL);
- return 0;
-}
-
-
-/**
- * Cancel all outstanding requests in a pipe. Logically all this
- * does is call cvmx_usb_cancel() in a loop.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe_handle:
- * Pipe handle to cancel requests in.
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_cancel_all(struct cvmx_usb_state *state, int pipe_handle)
-{
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
-
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
-
- /* Simply loop through and attempt to cancel each transaction */
- while (pipe->head) {
- int result = cvmx_usb_cancel(state, pipe_handle,
- __cvmx_usb_get_submit_handle(usb, pipe->head));
- if (unlikely(result != 0))
- return result;
- }
- return 0;
-}
-
-
-/**
- * Close a pipe created with cvmx_usb_open_pipe().
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @pipe_handle:
- * Pipe handle to close.
- *
- * Returns: 0 or a negative error code. EBUSY is returned if the pipe has
- * outstanding transfers.
- */
-int cvmx_usb_close_pipe(struct cvmx_usb_state *state, int pipe_handle)
-{
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
- struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
-
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
-
- /* Fail if the pipe has pending transactions */
- if (unlikely(pipe->head))
- return -EBUSY;
-
- pipe->flags = 0;
- __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
- __cvmx_usb_append_pipe(&usb->free_pipes, pipe);
-
- return 0;
-}
-
-
-/**
- * Register a function to be called when various USB events occur.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- * @reason: Which event to register for.
- * @callback: Function to call when the event occurs.
- * @user_data: User data parameter to the function.
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_register_callback(struct cvmx_usb_state *state,
- enum cvmx_usb_callback reason,
- cvmx_usb_callback_func_t callback,
- void *user_data)
-{
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- if (unlikely(reason >= __CVMX_USB_CALLBACK_END))
- return -EINVAL;
- if (unlikely(!callback))
- return -EINVAL;
-
- usb->callback[reason] = callback;
- usb->callback_data[reason] = user_data;
-
- return 0;
-}
-
-
-/**
- * Get the current USB protocol level frame number. The frame
- * number is always in the range of 0-0x7ff.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: USB frame number
- */
-int cvmx_usb_get_frame_number(struct cvmx_usb_state *state)
-{
- int frame_number;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
- union cvmx_usbcx_hfnum usbc_hfnum;
-
- usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
- frame_number = usbc_hfnum.s.frnum;
-
- return frame_number;
-}
-
-
-/**
- * Poll a channel for status
- *
- * @usb: USB device
- * @channel: Channel to poll
- *
- * Returns: Zero on success
- */
-static int __cvmx_usb_poll_channel(struct cvmx_usb_internal_state *usb, int channel)
-{
- union cvmx_usbcx_hcintx usbc_hcint;
- union cvmx_usbcx_hctsizx usbc_hctsiz;
- union cvmx_usbcx_hccharx usbc_hcchar;
- struct cvmx_usb_pipe *pipe;
- struct cvmx_usb_transaction *transaction;
- int bytes_this_transfer;
- int bytes_in_last_packet;
- int packets_processed;
- int buffer_space_left;
-
- /* Read the interrupt status bits for the channel */
- usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
-
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
- usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
-
- if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) {
- /*
- * There seems to be a bug in CN31XX which can cause
- * interrupt IN transfers to get stuck until we do a
- * write of HCCHARX without changing things
- */
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
- return 0;
- }
-
- /*
- * In non DMA mode the channels don't halt themselves. We need
- * to manually disable channels that are left running
- */
- if (!usbc_hcint.s.chhltd) {
- if (usbc_hcchar.s.chena) {
- union cvmx_usbcx_hcintmskx hcintmsk;
- /* Disable all interrupts except CHHLTD */
- hcintmsk.u32 = 0;
- hcintmsk.s.chhltdmsk = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), hcintmsk.u32);
- usbc_hcchar.s.chdis = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
- return 0;
- } else if (usbc_hcint.s.xfercompl) {
- /*
- * Successful IN/OUT with transfer complete.
- * Channel halt isn't needed.
- */
- } else {
- cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", usb->index, channel);
- return 0;
- }
- }
- } else {
- /*
- * There is are no interrupts that we need to process when the
- * channel is still running
- */
- if (!usbc_hcint.s.chhltd)
- return 0;
- }
-
- /* Disable the channel interrupts now that it is done */
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
- usb->idle_hardware_channels |= (1<<channel);
-
- /* Make sure this channel is tied to a valid pipe */
- pipe = usb->pipe_for_channel[channel];
- CVMX_PREFETCH(pipe, 0);
- CVMX_PREFETCH(pipe, 128);
- if (!pipe)
- return 0;
- transaction = pipe->head;
- CVMX_PREFETCH(transaction, 0);
-
- /*
- * Disconnect this pipe from the HW channel. Later the schedule
- * function will figure out which pipe needs to go
- */
- usb->pipe_for_channel[channel] = NULL;
- pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
-
- /*
- * Read the channel config info so we can figure out how much data
- * transfered
- */
- usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
- usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
-
- /*
- * Calculating the number of bytes successfully transferred is dependent
- * on the transfer direction
- */
- packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt;
- if (usbc_hcchar.s.epdir) {
- /*
- * IN transactions are easy. For every byte received the
- * hardware decrements xfersize. All we need to do is subtract
- * the current value of xfersize from its starting value and we
- * know how many bytes were written to the buffer
- */
- bytes_this_transfer = transaction->xfersize - usbc_hctsiz.s.xfersize;
- } else {
- /*
- * OUT transaction don't decrement xfersize. Instead pktcnt is
- * decremented on every successful packet send. The hardware
- * does this when it receives an ACK, or NYET. If it doesn't
- * receive one of these responses pktcnt doesn't change
- */
- bytes_this_transfer = packets_processed * usbc_hcchar.s.mps;
- /*
- * The last packet may not be a full transfer if we didn't have
- * enough data
- */
- if (bytes_this_transfer > transaction->xfersize)
- bytes_this_transfer = transaction->xfersize;
- }
- /* Figure out how many bytes were in the last packet of the transfer */
- if (packets_processed)
- bytes_in_last_packet = bytes_this_transfer - (packets_processed-1) * usbc_hcchar.s.mps;
- else
- bytes_in_last_packet = bytes_this_transfer;
-
- /*
- * As a special case, setup transactions output the setup header, not
- * the user's data. For this reason we don't count setup data as bytes
- * transferred
- */
- if ((transaction->stage == CVMX_USB_STAGE_SETUP) ||
- (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE))
- bytes_this_transfer = 0;
-
- /*
- * Add the bytes transferred to the running total. It is important that
- * bytes_this_transfer doesn't count any data that needs to be
- * retransmitted
- */
- transaction->actual_bytes += bytes_this_transfer;
- if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
- buffer_space_left = transaction->iso_packets[0].length - transaction->actual_bytes;
- else
- buffer_space_left = transaction->buffer_length - transaction->actual_bytes;
-
- /*
- * We need to remember the PID toggle state for the next transaction.
- * The hardware already updated it for the next transaction
- */
- pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0);
-
- /*
- * For high speed bulk out, assume the next transaction will need to do
- * a ping before proceeding. If this isn't true the ACK processing below
- * will clear this flag
- */
- if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
- (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
- (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT))
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
-
- if (usbc_hcint.s.stall) {
- /*
- * STALL as a response means this transaction cannot be
- * completed because the device can't process transactions. Tell
- * the user. Any data that was transferred will be counted on
- * the actual bytes transferred
- */
- pipe->pid_toggle = 0;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_STALL);
- } else if (usbc_hcint.s.xacterr) {
- /*
- * We know at least one packet worked if we get a ACK or NAK.
- * Reset the retry counter
- */
- if (usbc_hcint.s.nak || usbc_hcint.s.ack)
- transaction->retries = 0;
- transaction->retries++;
- if (transaction->retries > MAX_RETRIES) {
- /*
- * XactErr as a response means the device signaled
- * something wrong with the transfer. For example, PID
- * toggle errors cause these
- */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_XACTERR);
- } else {
- /*
- * If this was a split then clear our split in progress
- * marker
- */
- if (usb->active_split == transaction)
- usb->active_split = NULL;
- /*
- * Rewind to the beginning of the transaction by anding
- * off the split complete bit
- */
- transaction->stage &= ~1;
- pipe->split_sc_frame = -1;
- pipe->next_tx_frame += pipe->interval;
- if (pipe->next_tx_frame < usb->frame_number)
- pipe->next_tx_frame = usb->frame_number + pipe->interval -
- (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
- }
- } else if (usbc_hcint.s.bblerr) {
- /* Babble Error (BblErr) */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_BABBLEERR);
- } else if (usbc_hcint.s.datatglerr) {
- /* We'll retry the exact same transaction again */
- transaction->retries++;
- } else if (usbc_hcint.s.nyet) {
- /*
- * NYET as a response is only allowed in three cases: as a
- * response to a ping, as a response to a split transaction, and
- * as a response to a bulk out. The ping case is handled by
- * hardware, so we only have splits and bulk out
- */
- if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
- transaction->retries = 0;
- /*
- * If there is more data to go then we need to try
- * again. Otherwise this transaction is complete
- */
- if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet))
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- } else {
- /*
- * Split transactions retry the split complete 4 times
- * then rewind to the start split and do the entire
- * transactions again
- */
- transaction->retries++;
- if ((transaction->retries & 0x3) == 0) {
- /*
- * Rewind to the beginning of the transaction by
- * anding off the split complete bit
- */
- transaction->stage &= ~1;
- pipe->split_sc_frame = -1;
- }
- }
- } else if (usbc_hcint.s.ack) {
- transaction->retries = 0;
- /*
- * The ACK bit can only be checked after the other error bits.
- * This is because a multi packet transfer may succeed in a
- * number of packets and then get a different response on the
- * last packet. In this case both ACK and the last response bit
- * will be set. If none of the other response bits is set, then
- * the last packet must have been an ACK
- *
- * Since we got an ACK, we know we don't need to do a ping on
- * this pipe
- */
- pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING;
-
- switch (transaction->type) {
- case CVMX_USB_TRANSFER_CONTROL:
- switch (transaction->stage) {
- case CVMX_USB_STAGE_NON_CONTROL:
- case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
- /* This should be impossible */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
- break;
- case CVMX_USB_STAGE_SETUP:
- pipe->pid_toggle = 1;
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- transaction->stage = CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE;
- else {
- union cvmx_usb_control_header *header =
- cvmx_phys_to_ptr(transaction->control_header);
- if (header->s.length)
- transaction->stage = CVMX_USB_STAGE_DATA;
- else
- transaction->stage = CVMX_USB_STAGE_STATUS;
- }
- break;
- case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
- {
- union cvmx_usb_control_header *header =
- cvmx_phys_to_ptr(transaction->control_header);
- if (header->s.length)
- transaction->stage = CVMX_USB_STAGE_DATA;
- else
- transaction->stage = CVMX_USB_STAGE_STATUS;
- }
- break;
- case CVMX_USB_STAGE_DATA:
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- transaction->stage = CVMX_USB_STAGE_DATA_SPLIT_COMPLETE;
- /*
- * For setup OUT data that are splits,
- * the hardware doesn't appear to count
- * transferred data. Here we manually
- * update the data transferred
- */
- if (!usbc_hcchar.s.epdir) {
- if (buffer_space_left < pipe->max_packet)
- transaction->actual_bytes += buffer_space_left;
- else
- transaction->actual_bytes += pipe->max_packet;
- }
- } else if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
- pipe->pid_toggle = 1;
- transaction->stage = CVMX_USB_STAGE_STATUS;
- }
- break;
- case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
- if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
- pipe->pid_toggle = 1;
- transaction->stage = CVMX_USB_STAGE_STATUS;
- } else {
- transaction->stage = CVMX_USB_STAGE_DATA;
- }
- break;
- case CVMX_USB_STAGE_STATUS:
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- transaction->stage = CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE;
- else
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- break;
- case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- break;
- }
- break;
- case CVMX_USB_TRANSFER_BULK:
- case CVMX_USB_TRANSFER_INTERRUPT:
- /*
- * The only time a bulk transfer isn't complete when it
- * finishes with an ACK is during a split transaction.
- * For splits we need to continue the transfer if more
- * data is needed
- */
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL)
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
- else {
- if (buffer_space_left && (bytes_in_last_packet == pipe->max_packet))
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
- else {
- if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- }
- } else {
- if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
- (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
- (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
- (usbc_hcint.s.nak))
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
- if (!buffer_space_left || (bytes_in_last_packet < pipe->max_packet)) {
- if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- }
- break;
- case CVMX_USB_TRANSFER_ISOCHRONOUS:
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /*
- * ISOCHRONOUS OUT splits don't require a
- * complete split stage. Instead they use a
- * sequence of begin OUT splits to transfer the
- * data 188 bytes at a time. Once the transfer
- * is complete, the pipe sleeps until the next
- * schedule interval
- */
- if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
- /*
- * If no space left or this wasn't a max
- * size packet then this transfer is
- * complete. Otherwise start it again to
- * send the next 188 bytes
- */
- if (!buffer_space_left || (bytes_this_transfer < 188)) {
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- } else {
- if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) {
- /*
- * We are in the incoming data
- * phase. Keep getting data
- * until we run out of space or
- * get a small packet
- */
- if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- } else
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
- }
- } else {
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- break;
- }
- } else if (usbc_hcint.s.nak) {
- /*
- * If this was a split then clear our split in progress marker.
- */
- if (usb->active_split == transaction)
- usb->active_split = NULL;
- /*
- * NAK as a response means the device couldn't accept the
- * transaction, but it should be retried in the future. Rewind
- * to the beginning of the transaction by anding off the split
- * complete bit. Retry in the next interval
- */
- transaction->retries = 0;
- transaction->stage &= ~1;
- pipe->next_tx_frame += pipe->interval;
- if (pipe->next_tx_frame < usb->frame_number)
- pipe->next_tx_frame = usb->frame_number + pipe->interval -
- (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
- } else {
- struct cvmx_usb_port_status port;
- port = cvmx_usb_get_status((struct cvmx_usb_state *)usb);
- if (port.port_enabled) {
- /* We'll retry the exact same transaction again */
- transaction->retries++;
- } else {
- /*
- * We get channel halted interrupts with no result bits
- * sets when the cable is unplugged
- */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
- }
- }
- return 0;
-}
-
-
-/**
- * Poll the USB block for status and call all needed callback
- * handlers. This function is meant to be called in the interrupt
- * handler for the USB controller. It can also be called
- * periodically in a loop for non-interrupt based operation.
- *
- * @state: USB device state populated by
- * cvmx_usb_initialize().
- *
- * Returns: 0 or a negative error code.
- */
-int cvmx_usb_poll(struct cvmx_usb_state *state)
-{
- union cvmx_usbcx_hfnum usbc_hfnum;
- union cvmx_usbcx_gintsts usbc_gintsts;
- struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
-
- CVMX_PREFETCH(usb, 0);
- CVMX_PREFETCH(usb, 1*128);
- CVMX_PREFETCH(usb, 2*128);
- CVMX_PREFETCH(usb, 3*128);
- CVMX_PREFETCH(usb, 4*128);
-
- /* Update the frame counter */
- usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
- if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum)
- usb->frame_number += 0x4000;
- usb->frame_number &= ~0x3fffull;
- usb->frame_number |= usbc_hfnum.s.frnum;
-
- /* Read the pending interrupts */
- usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index));
-
- /* Clear the interrupts now that we know about them */
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32);
-
- if (usbc_gintsts.s.rxflvl) {
- /*
- * RxFIFO Non-Empty (RxFLvl)
- * Indicates that there is at least one packet pending to be
- * read from the RxFIFO.
- *
- * In DMA mode this is handled by hardware
- */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- __cvmx_usb_poll_rx_fifo(usb);
- }
- if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) {
- /* Fill the Tx FIFOs when not in DMA mode */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- __cvmx_usb_poll_tx_fifo(usb);
- }
- if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) {
- union cvmx_usbcx_hprt usbc_hprt;
- /*
- * Disconnect Detected Interrupt (DisconnInt)
- * Asserted when a device disconnect is detected.
- *
- * Host Port Interrupt (PrtInt)
- * The core sets this bit to indicate a change in port status of
- * one of the O2P USB core ports in Host mode. The application
- * must read the Host Port Control and Status (HPRT) register to
- * determine the exact event that caused this interrupt. The
- * application must clear the appropriate status bit in the Host
- * Port Control and Status register to clear this bit.
- *
- * Call the user's port callback
- */
- __cvmx_usb_perform_callback(usb, NULL, NULL,
- CVMX_USB_CALLBACK_PORT_CHANGED,
- CVMX_USB_COMPLETE_SUCCESS);
- /* Clear the port change bits */
- usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
- usbc_hprt.s.prtena = 0;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), usbc_hprt.u32);
- }
- if (usbc_gintsts.s.hchint) {
- /*
- * Host Channels Interrupt (HChInt)
- * The core sets this bit to indicate that an interrupt is
- * pending on one of the channels of the core (in Host mode).
- * The application must read the Host All Channels Interrupt
- * (HAINT) register to determine the exact number of the channel
- * on which the interrupt occurred, and then read the
- * corresponding Host Channel-n Interrupt (HCINTn) register to
- * determine the exact cause of the interrupt. The application
- * must clear the appropriate status bit in the HCINTn register
- * to clear this bit.
- */
- union cvmx_usbcx_haint usbc_haint;
- usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index));
- while (usbc_haint.u32) {
- int channel;
-
- channel = __fls(usbc_haint.u32);
- __cvmx_usb_poll_channel(usb, channel);
- usbc_haint.u32 ^= 1<<channel;
- }
- }
-
- __cvmx_usb_schedule(usb, usbc_gintsts.s.sof);
-
- return 0;
-}
diff --git a/drivers/staging/octeon-usb/cvmx-usb.h b/drivers/staging/octeon-usb/cvmx-usb.h
deleted file mode 100644
index 7b7a542..0000000
--- a/drivers/staging/octeon-usb/cvmx-usb.h
+++ /dev/null
@@ -1,521 +0,0 @@
-/***********************license start***************
- * Copyright (c) 2003-2010 Cavium Networks (support@xxxxxxxxxx). All rights
- * reserved.
- *
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
-
- * * Neither the name of Cavium Networks nor the names of
- * its contributors may be used to endorse or promote products
- * derived from this software without specific prior written
- * permission.
-
- * This Software, including technical data, may be subject to U.S. export
- * control laws, including the U.S. Export Administration Act and its associated
- * regulations, and may be subject to export or import regulations in other
- * countries.
-
- * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
- * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
- * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
- * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION
- * OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
- * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
- * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
- * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
- * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
- * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
- ***********************license end**************************************/
-
-
-/**
- * "cvmx-usb.h" defines a set of low level USB functions to help
- * developers create Octeon USB drivers for various operating
- * systems. These functions provide a generic API to the Octeon
- * USB blocks, hiding the internal hardware specific
- * operations.
- *
- * At a high level the device driver needs to:
- *
- * - Call cvmx_usb_get_num_ports() to get the number of
- * supported ports.
- * - Call cvmx_usb_initialize() for each Octeon USB port.
- * - Enable the port using cvmx_usb_enable().
- * - Either periodically, or in an interrupt handler, call
- * cvmx_usb_poll() to service USB events.
- * - Manage pipes using cvmx_usb_open_pipe() and
- * cvmx_usb_close_pipe().
- * - Manage transfers using cvmx_usb_submit_*() and
- * cvmx_usb_cancel*().
- * - Shutdown USB on unload using cvmx_usb_shutdown().
- *
- * To monitor USB status changes, the device driver must use
- * cvmx_usb_register_callback() to register for events that it
- * is interested in. Below are a few hints on successfully
- * implementing a driver on top of this API.
- *
- * == Initialization ==
- *
- * When a driver is first loaded, it is normally not necessary
- * to bring up the USB port completely. Most operating systems
- * expect to initialize and enable the port in two independent
- * steps. Normally an operating system will probe hardware,
- * initialize anything found, and then enable the hardware.
- *
- * In the probe phase you should:
- * - Use cvmx_usb_get_num_ports() to determine the number of
- * USB port to be supported.
- * - Allocate space for a struct cvmx_usb_state for each
- * port.
- * - Tell the operating system about each port
- *
- * In the initialization phase you should:
- * - Use cvmx_usb_initialize() on each port.
- * - Do not call cvmx_usb_enable(). This leaves the USB port in
- * the disabled state until the operating system is ready.
- *
- * Finally, in the enable phase you should:
- * - Call cvmx_usb_enable() on the appropriate port.
- * - Note that some operating system use a RESET instead of an
- * enable call. To implement RESET, you should call
- * cvmx_usb_disable() followed by cvmx_usb_enable().
- *
- * == Locking ==
- *
- * All of the functions in the cvmx-usb API assume exclusive
- * access to the USB hardware and internal data structures. This
- * means that the driver must provide locking as necessary.
- *
- * In the single CPU state it is normally enough to disable
- * interrupts before every call to cvmx_usb*() and enable them
- * again after the call is complete. Keep in mind that it is
- * very common for the callback handlers to make additional
- * calls into cvmx-usb, so the disable/enable must be protected
- * against recursion. As an example, the Linux kernel
- * local_irq_save() and local_irq_restore() are perfect for this
- * in the non SMP case.
- *
- * In the SMP case, locking is more complicated. For SMP you not
- * only need to disable interrupts on the local core, but also
- * take a lock to make sure that another core cannot call
- * cvmx-usb.
- *
- * == Port callback ==
- *
- * The port callback prototype needs to look as follows:
- *
- * void port_callback(struct cvmx_usb_state *usb,
- * enum cvmx_usb_callback reason,
- * enum cvmx_usb_complete status,
- * int pipe_handle,
- * int submit_handle,
- * int bytes_transferred,
- * void *user_data);
- * - "usb" is the struct cvmx_usb_state for the port.
- * - "reason" will always be CVMX_USB_CALLBACK_PORT_CHANGED.
- * - "status" will always be CVMX_USB_COMPLETE_SUCCESS.
- * - "pipe_handle" will always be -1.
- * - "submit_handle" will always be -1.
- * - "bytes_transferred" will always be 0.
- * - "user_data" is the void pointer originally passed along
- * with the callback. Use this for any state information you
- * need.
- *
- * The port callback will be called whenever the user plugs /
- * unplugs a device from the port. It will not be called when a
- * device is plugged / unplugged from a hub connected to the
- * root port. Normally all the callback needs to do is tell the
- * operating system to poll the root hub for status. Under
- * Linux, this is performed by calling usb_hcd_poll_rh_status().
- * In the Linux driver we use "user_data". to pass around the
- * Linux "hcd" structure. Once the port callback completes,
- * Linux automatically calls octeon_usb_hub_status_data() which
- * uses cvmx_usb_get_status() to determine the root port status.
- *
- * == Complete callback ==
- *
- * The completion callback prototype needs to look as follows:
- *
- * void complete_callback(struct cvmx_usb_state *usb,
- * enum cvmx_usb_callback reason,
- * enum cvmx_usb_complete status,
- * int pipe_handle,
- * int submit_handle,
- * int bytes_transferred,
- * void *user_data);
- * - "usb" is the struct cvmx_usb_state for the port.
- * - "reason" will always be CVMX_USB_CALLBACK_TRANSFER_COMPLETE.
- * - "status" will be one of the cvmx_usb_complete enumerations.
- * - "pipe_handle" is the handle to the pipe the transaction
- * was originally submitted on.
- * - "submit_handle" is the handle returned by the original
- * cvmx_usb_submit_* call.
- * - "bytes_transferred" is the number of bytes successfully
- * transferred in the transaction. This will be zero on most
- * error conditions.
- * - "user_data" is the void pointer originally passed along
- * with the callback. Use this for any state information you
- * need. For example, the Linux "urb" is stored in here in the
- * Linux driver.
- *
- * In general your callback handler should use "status" and
- * "bytes_transferred" to tell the operating system the how the
- * transaction completed. Normally the pipe is not changed in
- * this callback.
- *
- * == Canceling transactions ==
- *
- * When a transaction is cancelled using cvmx_usb_cancel*(), the
- * actual length of time until the complete callback is called
- * can vary greatly. It may be called before cvmx_usb_cancel*()
- * returns, or it may be called a number of usb frames in the
- * future once the hardware frees the transaction. In either of
- * these cases, the complete handler will receive
- * CVMX_USB_COMPLETE_CANCEL.
- *
- * == Handling pipes ==
- *
- * USB "pipes" is a software construct created by this API to
- * enable the ordering of usb transactions to a device endpoint.
- * Octeon's underlying hardware doesn't have any concept
- * equivalent to "pipes". The hardware instead has eight
- * channels that can be used simultaneously to have up to eight
- * transaction in process at the same time. In order to maintain
- * ordering in a pipe, the transactions for a pipe will only be
- * active in one hardware channel at a time. From an API user's
- * perspective, this doesn't matter but it can be helpful to
- * keep this in mind when you are probing hardware while
- * debugging.
- *
- * Also keep in mind that usb transactions contain state
- * information about the previous transaction to the same
- * endpoint. Each transaction has a PID toggle that changes 0/1
- * between each sub packet. This is maintained in the pipe data
- * structures. For this reason, you generally cannot create and
- * destroy a pipe for every transaction. A sequence of
- * transaction to the same endpoint must use the same pipe.
- *
- * == Root Hub ==
- *
- * Some operating systems view the usb root port as a normal usb
- * hub. These systems attempt to control the root hub with
- * messages similar to the usb 2.0 spec for hub control and
- * status. For these systems it may be necessary to write
- * function to decode standard usb control messages into
- * equivalent cvmx-usb API calls.
- *
- * == Interrupts ==
- *
- * If you plan on using usb interrupts, cvmx_usb_poll() must be
- * called on every usb interrupt. It will read the usb state,
- * call any needed callbacks, and schedule transactions as
- * needed. Your device driver needs only to hookup an interrupt
- * handler and call cvmx_usb_poll(). Octeon's usb port 0 causes
- * CIU bit CIU_INT*_SUM0[USB] to be set (bit 56). For port 1,
- * CIU bit CIU_INT_SUM1[USB1] is set (bit 17). How these bits
- * are turned into interrupt numbers is operating system
- * specific. For Linux, there are the convenient defines
- * OCTEON_IRQ_USB0 and OCTEON_IRQ_USB1 for the IRQ numbers.
- *
- * If you aren't using interrupts, simple call cvmx_usb_poll()
- * in your main processing loop.
- */
-
-#ifndef __CVMX_USB_H__
-#define __CVMX_USB_H__
-
-/**
- * enum cvmx_usb_speed - the possible USB device speeds
- *
- * @CVMX_USB_SPEED_HIGH: Device is operation at 480Mbps
- * @CVMX_USB_SPEED_FULL: Device is operation at 12Mbps
- * @CVMX_USB_SPEED_LOW: Device is operation at 1.5Mbps
- */
-enum cvmx_usb_speed {
- CVMX_USB_SPEED_HIGH = 0,
- CVMX_USB_SPEED_FULL = 1,
- CVMX_USB_SPEED_LOW = 2,
-};
-
-/**
- * enum cvmx_usb_transfer - the possible USB transfer types
- *
- * @CVMX_USB_TRANSFER_CONTROL: USB transfer type control for hub and status
- * transfers
- * @CVMX_USB_TRANSFER_ISOCHRONOUS: USB transfer type isochronous for low
- * priority periodic transfers
- * @CVMX_USB_TRANSFER_BULK: USB transfer type bulk for large low priority
- * transfers
- * @CVMX_USB_TRANSFER_INTERRUPT: USB transfer type interrupt for high priority
- * periodic transfers
- */
-enum cvmx_usb_transfer {
- CVMX_USB_TRANSFER_CONTROL = 0,
- CVMX_USB_TRANSFER_ISOCHRONOUS = 1,
- CVMX_USB_TRANSFER_BULK = 2,
- CVMX_USB_TRANSFER_INTERRUPT = 3,
-};
-
-/**
- * enum cvmx_usb_direction - the transfer directions
- *
- * @CVMX_USB_DIRECTION_OUT: Data is transferring from Octeon to the device/host
- * @CVMX_USB_DIRECTION_IN: Data is transferring from the device/host to Octeon
- */
-enum cvmx_usb_direction {
- CVMX_USB_DIRECTION_OUT,
- CVMX_USB_DIRECTION_IN,
-};
-
-/**
- * enum cvmx_usb_complete - possible callback function status codes
- *
- * @CVMX_USB_COMPLETE_SUCCESS: The transaction / operation finished without
- * any errors
- * @CVMX_USB_COMPLETE_SHORT: FIXME: This is currently not implemented
- * @CVMX_USB_COMPLETE_CANCEL: The transaction was canceled while in flight
- * by a user call to cvmx_usb_cancel
- * @CVMX_USB_COMPLETE_ERROR: The transaction aborted with an unexpected
- * error status
- * @CVMX_USB_COMPLETE_STALL: The transaction received a USB STALL response
- * from the device
- * @CVMX_USB_COMPLETE_XACTERR: The transaction failed with an error from the
- * device even after a number of retries
- * @CVMX_USB_COMPLETE_DATATGLERR: The transaction failed with a data toggle
- * error even after a number of retries
- * @CVMX_USB_COMPLETE_BABBLEERR: The transaction failed with a babble error
- * @CVMX_USB_COMPLETE_FRAMEERR: The transaction failed with a frame error
- * even after a number of retries
- */
-enum cvmx_usb_complete {
- CVMX_USB_COMPLETE_SUCCESS,
- CVMX_USB_COMPLETE_SHORT,
- CVMX_USB_COMPLETE_CANCEL,
- CVMX_USB_COMPLETE_ERROR,
- CVMX_USB_COMPLETE_STALL,
- CVMX_USB_COMPLETE_XACTERR,
- CVMX_USB_COMPLETE_DATATGLERR,
- CVMX_USB_COMPLETE_BABBLEERR,
- CVMX_USB_COMPLETE_FRAMEERR,
-};
-
-/**
- * struct cvmx_usb_port_status - the USB port status information
- *
- * @port_enabled: 1 = Usb port is enabled, 0 = disabled
- * @port_over_current: 1 = Over current detected, 0 = Over current not
- * detected. Octeon doesn't support over current detection.
- * @port_powered: 1 = Port power is being supplied to the device, 0 =
- * power is off. Octeon doesn't support turning port power
- * off.
- * @port_speed: Current port speed.
- * @connected: 1 = A device is connected to the port, 0 = No device is
- * connected.
- * @connect_change: 1 = Device connected state changed since the last set
- * status call.
- */
-struct cvmx_usb_port_status {
- uint32_t reserved : 25;
- uint32_t port_enabled : 1;
- uint32_t port_over_current : 1;
- uint32_t port_powered : 1;
- enum cvmx_usb_speed port_speed : 2;
- uint32_t connected : 1;
- uint32_t connect_change : 1;
-};
-
-/**
- * union cvmx_usb_control_header - the structure of a Control packet header
- *
- * @s.request_type: Bit 7 tells the direction: 1=IN, 0=OUT
- * @s.request The standard usb request to make
- * @s.value Value parameter for the request in little endian format
- * @s.index Index for the request in little endian format
- * @s.length Length of the data associated with this request in
- * little endian format
- */
-union cvmx_usb_control_header {
- uint64_t u64;
- struct {
- uint64_t request_type : 8;
- uint64_t request : 8;
- uint64_t value : 16;
- uint64_t index : 16;
- uint64_t length : 16;
- } s;
-};
-
-/**
- * struct cvmx_usb_iso_packet - descriptor for Isochronous packets
- *
- * @offset: This is the offset in bytes into the main buffer where this data
- * is stored.
- * @length: This is the length in bytes of the data.
- * @status: This is the status of this individual packet transfer.
- */
-struct cvmx_usb_iso_packet {
- int offset;
- int length;
- enum cvmx_usb_complete status;
-};
-
-/**
- * enum cvmx_usb_callback - possible callback reasons for the USB API
- *
- * @CVMX_USB_CALLBACK_TRANSFER_COMPLETE: A callback of this type is called when
- * a submitted transfer completes. The
- * completion callback will be called even
- * if the transfer fails or is canceled.
- * The status parameter will contain
- * details of why he callback was called.
- * @CVMX_USB_CALLBACK_PORT_CHANGED: The status of the port changed. For
- * example, someone may have plugged a
- * device in. The status parameter
- * contains CVMX_USB_COMPLETE_SUCCESS. Use
- * cvmx_usb_get_status() to get the new
- * port status.
- * @__CVMX_USB_CALLBACK_END: Do not use. Used internally for array
- * bounds.
- */
-enum cvmx_usb_callback {
- CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
- CVMX_USB_CALLBACK_PORT_CHANGED,
- __CVMX_USB_CALLBACK_END
-};
-
-/**
- * USB state internal data. The contents of this structure
- * may change in future SDKs. No data in it should be referenced
- * by user's of this API.
- */
-struct cvmx_usb_state {
- char data[65536];
-};
-
-/**
- * USB callback functions are always of the following type.
- * The parameters are as follows:
- * - state = USB device state populated by
- * cvmx_usb_initialize().
- * - reason = The enum cvmx_usb_callback used to register
- * the callback.
- * - status = The enum cvmx_usb_complete representing the
- * status code of a transaction.
- * - pipe_handle = The Pipe that caused this callback, or
- * -1 if this callback wasn't associated with a pipe.
- * - submit_handle = Transfer submit handle causing this
- * callback, or -1 if this callback wasn't associated
- * with a transfer.
- * - Actual number of bytes transfer.
- * - user_data = The user pointer supplied to the
- * function cvmx_usb_submit() or
- * cvmx_usb_register_callback() */
-typedef void (*cvmx_usb_callback_func_t)(struct cvmx_usb_state *state,
- enum cvmx_usb_callback reason,
- enum cvmx_usb_complete status,
- int pipe_handle, int submit_handle,
- int bytes_transferred, void *user_data);
-
-/**
- * enum cvmx_usb_initialize_flags - flags used by the initialization function
- *
- * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI: The USB port uses a 12MHz crystal
- * as clock source at USB_XO and
- * USB_XI.
- * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND: The USB port uses 12/24/48MHz 2.5V
- * board clock source at USB_XO.
- * USB_XI should be tied to GND.
- * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK: Mask for clock speed field
- * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: Speed of reference clock or
- * crystal
- * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: Speed of reference clock
- * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: Speed of reference clock
- * @CVMX_USB_INITIALIZE_FLAGS_NO_DMA: Disable DMA and used polled IO for
- * data transfer use for the USB
- */
-enum cvmx_usb_initialize_flags {
- CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI = 1 << 0,
- CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND = 1 << 1,
- CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK = 3 << 3,
- CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ = 1 << 3,
- CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ = 2 << 3,
- CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ = 3 << 3,
- /* Bits 3-4 used to encode the clock frequency */
- CVMX_USB_INITIALIZE_FLAGS_NO_DMA = 1 << 5,
-};
-
-/**
- * enum cvmx_usb_pipe_flags - internal flags for a pipe.
- *
- * @__CVMX_USB_PIPE_FLAGS_OPEN: Used internally to determine if a pipe is
- * open. Do not use.
- * @__CVMX_USB_PIPE_FLAGS_SCHEDULED: Used internally to determine if a pipe is
- * actively using hardware. Do not use.
- * @__CVMX_USB_PIPE_FLAGS_NEED_PING: Used internally to determine if a high
- * speed pipe is in the ping state. Do not
- * use.
- */
-enum cvmx_usb_pipe_flags {
- __CVMX_USB_PIPE_FLAGS_OPEN = 1 << 16,
- __CVMX_USB_PIPE_FLAGS_SCHEDULED = 1 << 17,
- __CVMX_USB_PIPE_FLAGS_NEED_PING = 1 << 18,
-};
-
-extern int cvmx_usb_get_num_ports(void);
-extern int cvmx_usb_initialize(struct cvmx_usb_state *state,
- int usb_port_number);
-extern int cvmx_usb_shutdown(struct cvmx_usb_state *state);
-extern int cvmx_usb_enable(struct cvmx_usb_state *state);
-extern int cvmx_usb_disable(struct cvmx_usb_state *state);
-extern struct cvmx_usb_port_status cvmx_usb_get_status(struct cvmx_usb_state *state);
-extern void cvmx_usb_set_status(struct cvmx_usb_state *state, struct cvmx_usb_port_status port_status);
-extern int cvmx_usb_open_pipe(struct cvmx_usb_state *state,
- int device_addr, int endpoint_num,
- enum cvmx_usb_speed device_speed, int max_packet,
- enum cvmx_usb_transfer transfer_type,
- enum cvmx_usb_direction transfer_dir, int interval,
- int multi_count, int hub_device_addr,
- int hub_port);
-extern int cvmx_usb_submit_bulk(struct cvmx_usb_state *state, int pipe_handle,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data);
-extern int cvmx_usb_submit_interrupt(struct cvmx_usb_state *state, int pipe_handle,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data);
-extern int cvmx_usb_submit_control(struct cvmx_usb_state *state, int pipe_handle,
- uint64_t control_header,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data);
-
-extern int cvmx_usb_submit_isochronous(struct cvmx_usb_state *state, int pipe_handle,
- int start_frame,
- int number_packets,
- struct cvmx_usb_iso_packet packets[],
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data);
-extern int cvmx_usb_cancel(struct cvmx_usb_state *state, int pipe_handle,
- int submit_handle);
-extern int cvmx_usb_cancel_all(struct cvmx_usb_state *state, int pipe_handle);
-extern int cvmx_usb_close_pipe(struct cvmx_usb_state *state, int pipe_handle);
-extern int cvmx_usb_register_callback(struct cvmx_usb_state *state,
- enum cvmx_usb_callback reason,
- cvmx_usb_callback_func_t callback,
- void *user_data);
-extern int cvmx_usb_get_frame_number(struct cvmx_usb_state *state);
-extern int cvmx_usb_poll(struct cvmx_usb_state *state);
-
-#endif /* __CVMX_USB_H__ */
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c b/drivers/staging/octeon-usb/octeon-hcd.c
index 764a8df..478a903 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -4,6 +4,44 @@
* for more details.
*
* Copyright (C) 2008 Cavium Networks
+ *
+ * Some parts of the code were originally released under BSD license:
+ *
+ * Copyright (c) 2003-2010 Cavium Networks (support@xxxxxxxxxx). All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * * Neither the name of Cavium Networks nor the names of
+ * its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written
+ * permission.
+ *
+ * This Software, including technical data, may be subject to U.S. export
+ * control laws, including the U.S. Export Administration Act and its associated
+ * regulations, and may be subject to export or import regulations in other
+ * countries.
+ *
+ * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
+ * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
+ * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
+ * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION
+ * OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
+ * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
+ * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
+ * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
+ * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
+ * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
*/
#include <linux/kernel.h>
#include <linux/module.h>
@@ -17,13 +55,482 @@
#include <linux/delay.h>
#include <asm/octeon/cvmx.h>
-#include "cvmx-usb.h"
#include <asm/octeon/cvmx-iob-defs.h>
#include <linux/usb/hcd.h>
#include <linux/err.h>
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-helper.h>
+#include <asm/octeon/cvmx-sysinfo.h>
+#include <asm/octeon/cvmx-helper-board.h>
+
+#include "cvmx-usbcx-defs.h"
+#include "cvmx-usbnx-defs.h"
+
+/**
+ * enum cvmx_usb_speed - the possible USB device speeds
+ *
+ * @CVMX_USB_SPEED_HIGH: Device is operation at 480Mbps
+ * @CVMX_USB_SPEED_FULL: Device is operation at 12Mbps
+ * @CVMX_USB_SPEED_LOW: Device is operation at 1.5Mbps
+ */
+enum cvmx_usb_speed {
+ CVMX_USB_SPEED_HIGH = 0,
+ CVMX_USB_SPEED_FULL = 1,
+ CVMX_USB_SPEED_LOW = 2,
+};
+
+/**
+ * enum cvmx_usb_transfer - the possible USB transfer types
+ *
+ * @CVMX_USB_TRANSFER_CONTROL: USB transfer type control for hub and status
+ * transfers
+ * @CVMX_USB_TRANSFER_ISOCHRONOUS: USB transfer type isochronous for low
+ * priority periodic transfers
+ * @CVMX_USB_TRANSFER_BULK: USB transfer type bulk for large low priority
+ * transfers
+ * @CVMX_USB_TRANSFER_INTERRUPT: USB transfer type interrupt for high priority
+ * periodic transfers
+ */
+enum cvmx_usb_transfer {
+ CVMX_USB_TRANSFER_CONTROL = 0,
+ CVMX_USB_TRANSFER_ISOCHRONOUS = 1,
+ CVMX_USB_TRANSFER_BULK = 2,
+ CVMX_USB_TRANSFER_INTERRUPT = 3,
+};
+
+/**
+ * enum cvmx_usb_direction - the transfer directions
+ *
+ * @CVMX_USB_DIRECTION_OUT: Data is transferring from Octeon to the device/host
+ * @CVMX_USB_DIRECTION_IN: Data is transferring from the device/host to Octeon
+ */
+enum cvmx_usb_direction {
+ CVMX_USB_DIRECTION_OUT,
+ CVMX_USB_DIRECTION_IN,
+};
+
+/**
+ * enum cvmx_usb_complete - possible callback function status codes
+ *
+ * @CVMX_USB_COMPLETE_SUCCESS: The transaction / operation finished without
+ * any errors
+ * @CVMX_USB_COMPLETE_SHORT: FIXME: This is currently not implemented
+ * @CVMX_USB_COMPLETE_CANCEL: The transaction was canceled while in flight
+ * by a user call to cvmx_usb_cancel
+ * @CVMX_USB_COMPLETE_ERROR: The transaction aborted with an unexpected
+ * error status
+ * @CVMX_USB_COMPLETE_STALL: The transaction received a USB STALL response
+ * from the device
+ * @CVMX_USB_COMPLETE_XACTERR: The transaction failed with an error from the
+ * device even after a number of retries
+ * @CVMX_USB_COMPLETE_DATATGLERR: The transaction failed with a data toggle
+ * error even after a number of retries
+ * @CVMX_USB_COMPLETE_BABBLEERR: The transaction failed with a babble error
+ * @CVMX_USB_COMPLETE_FRAMEERR: The transaction failed with a frame error
+ * even after a number of retries
+ */
+enum cvmx_usb_complete {
+ CVMX_USB_COMPLETE_SUCCESS,
+ CVMX_USB_COMPLETE_SHORT,
+ CVMX_USB_COMPLETE_CANCEL,
+ CVMX_USB_COMPLETE_ERROR,
+ CVMX_USB_COMPLETE_STALL,
+ CVMX_USB_COMPLETE_XACTERR,
+ CVMX_USB_COMPLETE_DATATGLERR,
+ CVMX_USB_COMPLETE_BABBLEERR,
+ CVMX_USB_COMPLETE_FRAMEERR,
+};
+
+/**
+ * struct cvmx_usb_port_status - the USB port status information
+ *
+ * @port_enabled: 1 = Usb port is enabled, 0 = disabled
+ * @port_over_current: 1 = Over current detected, 0 = Over current not
+ * detected. Octeon doesn't support over current detection.
+ * @port_powered: 1 = Port power is being supplied to the device, 0 =
+ * power is off. Octeon doesn't support turning port power
+ * off.
+ * @port_speed: Current port speed.
+ * @connected: 1 = A device is connected to the port, 0 = No device is
+ * connected.
+ * @connect_change: 1 = Device connected state changed since the last set
+ * status call.
+ */
+struct cvmx_usb_port_status {
+ uint32_t reserved : 25;
+ uint32_t port_enabled : 1;
+ uint32_t port_over_current : 1;
+ uint32_t port_powered : 1;
+ enum cvmx_usb_speed port_speed : 2;
+ uint32_t connected : 1;
+ uint32_t connect_change : 1;
+};
+
+/**
+ * union cvmx_usb_control_header - the structure of a Control packet header
+ *
+ * @s.request_type: Bit 7 tells the direction: 1=IN, 0=OUT
+ * @s.request The standard usb request to make
+ * @s.value Value parameter for the request in little endian format
+ * @s.index Index for the request in little endian format
+ * @s.length Length of the data associated with this request in
+ * little endian format
+ */
+union cvmx_usb_control_header {
+ uint64_t u64;
+ struct {
+ uint64_t request_type : 8;
+ uint64_t request : 8;
+ uint64_t value : 16;
+ uint64_t index : 16;
+ uint64_t length : 16;
+ } s;
+};
+
+/**
+ * struct cvmx_usb_iso_packet - descriptor for Isochronous packets
+ *
+ * @offset: This is the offset in bytes into the main buffer where this data
+ * is stored.
+ * @length: This is the length in bytes of the data.
+ * @status: This is the status of this individual packet transfer.
+ */
+struct cvmx_usb_iso_packet {
+ int offset;
+ int length;
+ enum cvmx_usb_complete status;
+};
+
+/**
+ * enum cvmx_usb_callback - possible callback reasons for the USB API
+ *
+ * @CVMX_USB_CALLBACK_TRANSFER_COMPLETE: A callback of this type is called when
+ * a submitted transfer completes. The
+ * completion callback will be called even
+ * if the transfer fails or is canceled.
+ * The status parameter will contain
+ * details of why he callback was called.
+ * @CVMX_USB_CALLBACK_PORT_CHANGED: The status of the port changed. For
+ * example, someone may have plugged a
+ * device in. The status parameter
+ * contains CVMX_USB_COMPLETE_SUCCESS. Use
+ * cvmx_usb_get_status() to get the new
+ * port status.
+ * @__CVMX_USB_CALLBACK_END: Do not use. Used internally for array
+ * bounds.
+ */
+enum cvmx_usb_callback {
+ CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
+ CVMX_USB_CALLBACK_PORT_CHANGED,
+ __CVMX_USB_CALLBACK_END
+};
+
+/**
+ * USB state internal data. The contents of this structure
+ * may change in future SDKs. No data in it should be referenced
+ * by user's of this API.
+ */
+struct cvmx_usb_state {
+ char data[65536];
+};
+
+/**
+ * USB callback functions are always of the following type.
+ * The parameters are as follows:
+ * - state = USB device state populated by
+ * cvmx_usb_initialize().
+ * - reason = The enum cvmx_usb_callback used to register
+ * the callback.
+ * - status = The enum cvmx_usb_complete representing the
+ * status code of a transaction.
+ * - pipe_handle = The Pipe that caused this callback, or
+ * -1 if this callback wasn't associated with a pipe.
+ * - submit_handle = Transfer submit handle causing this
+ * callback, or -1 if this callback wasn't associated
+ * with a transfer.
+ * - Actual number of bytes transfer.
+ * - user_data = The user pointer supplied to the
+ * function cvmx_usb_submit() or
+ * cvmx_usb_register_callback() */
+typedef void (*cvmx_usb_callback_func_t)(struct cvmx_usb_state *state,
+ enum cvmx_usb_callback reason,
+ enum cvmx_usb_complete status,
+ int pipe_handle, int submit_handle,
+ int bytes_transferred, void *user_data);
+
+/**
+ * enum cvmx_usb_initialize_flags - flags used by the initialization function
+ *
+ * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI: The USB port uses a 12MHz crystal
+ * as clock source at USB_XO and
+ * USB_XI.
+ * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND: The USB port uses 12/24/48MHz 2.5V
+ * board clock source at USB_XO.
+ * USB_XI should be tied to GND.
+ * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK: Mask for clock speed field
+ * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ: Speed of reference clock or
+ * crystal
+ * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ: Speed of reference clock
+ * @CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ: Speed of reference clock
+ * @CVMX_USB_INITIALIZE_FLAGS_NO_DMA: Disable DMA and used polled IO for
+ * data transfer use for the USB
+ */
+enum cvmx_usb_initialize_flags {
+ CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI = 1 << 0,
+ CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND = 1 << 1,
+ CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK = 3 << 3,
+ CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ = 1 << 3,
+ CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ = 2 << 3,
+ CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ = 3 << 3,
+ /* Bits 3-4 used to encode the clock frequency */
+ CVMX_USB_INITIALIZE_FLAGS_NO_DMA = 1 << 5,
+};
+
+/**
+ * enum cvmx_usb_pipe_flags - internal flags for a pipe.
+ *
+ * @__CVMX_USB_PIPE_FLAGS_OPEN: Used internally to determine if a pipe is
+ * open. Do not use.
+ * @__CVMX_USB_PIPE_FLAGS_SCHEDULED: Used internally to determine if a pipe is
+ * actively using hardware. Do not use.
+ * @__CVMX_USB_PIPE_FLAGS_NEED_PING: Used internally to determine if a high
+ * speed pipe is in the ping state. Do not
+ * use.
+ */
+enum cvmx_usb_pipe_flags {
+ __CVMX_USB_PIPE_FLAGS_OPEN = 1 << 16,
+ __CVMX_USB_PIPE_FLAGS_SCHEDULED = 1 << 17,
+ __CVMX_USB_PIPE_FLAGS_NEED_PING = 1 << 18,
+};
+
+/* Normal prefetch that use the pref instruction. */
+#define CVMX_PREFETCH(address, offset) asm volatile ("pref %[type], %[off](%[rbase])" : : [rbase] "d" (address), [off] "I" (offset), [type] "n" (0))
+
+/* Maximum number of times to retry failed transactions */
+#define MAX_RETRIES 3
+
+/* Maximum number of pipes that can be open at once */
+#define MAX_PIPES 32
+
+/* Maximum number of outstanding transactions across all pipes */
+#define MAX_TRANSACTIONS 256
+
+/* Maximum number of hardware channels supported by the USB block */
+#define MAX_CHANNELS 8
+
+/* The highest valid USB device address */
+#define MAX_USB_ADDRESS 127
+
+/* The highest valid USB endpoint number */
+#define MAX_USB_ENDPOINT 15
+
+/* The highest valid port number on a hub */
+#define MAX_USB_HUB_PORT 15
+
+/*
+ * The low level hardware can transfer a maximum of this number of bytes in each
+ * transfer. The field is 19 bits wide
+ */
+#define MAX_TRANSFER_BYTES ((1<<19)-1)
+
+/*
+ * The low level hardware can transfer a maximum of this number of packets in
+ * each transfer. The field is 10 bits wide
+ */
+#define MAX_TRANSFER_PACKETS ((1<<10)-1)
+
+enum cvmx_usb_transaction_flags {
+ __CVMX_USB_TRANSACTION_FLAGS_IN_USE = 1<<16,
+};
+
+enum {
+ USB_CLOCK_TYPE_REF_12,
+ USB_CLOCK_TYPE_REF_24,
+ USB_CLOCK_TYPE_REF_48,
+ USB_CLOCK_TYPE_CRYSTAL_12,
+};
+
+/**
+ * Logical transactions may take numerous low level
+ * transactions, especially when splits are concerned. This
+ * enum represents all of the possible stages a transaction can
+ * be in. Note that split completes are always even. This is so
+ * the NAK handler can backup to the previous low level
+ * transaction with a simple clearing of bit 0.
+ */
+enum cvmx_usb_stage {
+ CVMX_USB_STAGE_NON_CONTROL,
+ CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE,
+ CVMX_USB_STAGE_SETUP,
+ CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE,
+ CVMX_USB_STAGE_DATA,
+ CVMX_USB_STAGE_DATA_SPLIT_COMPLETE,
+ CVMX_USB_STAGE_STATUS,
+ CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE,
+};
+
+/**
+ * struct cvmx_usb_transaction - describes each pending USB transaction
+ * regardless of type. These are linked together
+ * to form a list of pending requests for a pipe.
+ *
+ * @prev: Transaction before this one in the pipe.
+ * @next: Transaction after this one in the pipe.
+ * @type: Type of transaction, duplicated of the pipe.
+ * @flags: State flags for this transaction.
+ * @buffer: User's physical buffer address to read/write.
+ * @buffer_length: Size of the user's buffer in bytes.
+ * @control_header: For control transactions, physical address of the 8
+ * byte standard header.
+ * @iso_start_frame: For ISO transactions, the starting frame number.
+ * @iso_number_packets: For ISO transactions, the number of packets in the
+ * request.
+ * @iso_packets: For ISO transactions, the sub packets in the request.
+ * @actual_bytes: Actual bytes transfer for this transaction.
+ * @stage: For control transactions, the current stage.
+ * @callback: User's callback function when complete.
+ * @callback_data: User's data.
+ */
+struct cvmx_usb_transaction {
+ struct cvmx_usb_transaction *prev;
+ struct cvmx_usb_transaction *next;
+ enum cvmx_usb_transfer type;
+ enum cvmx_usb_transaction_flags flags;
+ uint64_t buffer;
+ int buffer_length;
+ uint64_t control_header;
+ int iso_start_frame;
+ int iso_number_packets;
+ struct cvmx_usb_iso_packet *iso_packets;
+ int xfersize;
+ int pktcnt;
+ int retries;
+ int actual_bytes;
+ enum cvmx_usb_stage stage;
+ cvmx_usb_callback_func_t callback;
+ void *callback_data;
+};
+
+/**
+ * struct cvmx_usb_pipe - a pipe represents a virtual connection between Octeon
+ * and some USB device. It contains a list of pending
+ * request to the device.
+ *
+ * @prev: Pipe before this one in the list
+ * @next: Pipe after this one in the list
+ * @head: The first pending transaction
+ * @tail: The last pending transaction
+ * @interval: For periodic pipes, the interval between packets in
+ * frames
+ * @next_tx_frame: The next frame this pipe is allowed to transmit on
+ * @flags: State flags for this pipe
+ * @device_speed: Speed of device connected to this pipe
+ * @transfer_type: Type of transaction supported by this pipe
+ * @transfer_dir: IN or OUT. Ignored for Control
+ * @multi_count: Max packet in a row for the device
+ * @max_packet: The device's maximum packet size in bytes
+ * @device_addr: USB device address at other end of pipe
+ * @endpoint_num: USB endpoint number at other end of pipe
+ * @hub_device_addr: Hub address this device is connected to
+ * @hub_port: Hub port this device is connected to
+ * @pid_toggle: This toggles between 0/1 on every packet send to track
+ * the data pid needed
+ * @channel: Hardware DMA channel for this pipe
+ * @split_sc_frame: The low order bits of the frame number the split
+ * complete should be sent on
+ */
+struct cvmx_usb_pipe {
+ struct cvmx_usb_pipe *prev;
+ struct cvmx_usb_pipe *next;
+ struct cvmx_usb_transaction *head;
+ struct cvmx_usb_transaction *tail;
+ uint64_t interval;
+ uint64_t next_tx_frame;
+ enum cvmx_usb_pipe_flags flags;
+ enum cvmx_usb_speed device_speed;
+ enum cvmx_usb_transfer transfer_type;
+ enum cvmx_usb_direction transfer_dir;
+ int multi_count;
+ uint16_t max_packet;
+ uint8_t device_addr;
+ uint8_t endpoint_num;
+ uint8_t hub_device_addr;
+ uint8_t hub_port;
+ uint8_t pid_toggle;
+ uint8_t channel;
+ int8_t split_sc_frame;
+};
+
+/**
+ * struct cvmx_usb_pipe_list
+ *
+ * @head: Head of the list, or NULL if empty.
+ * @tail: Tail if the list, or NULL if empty.
+ */
+struct cvmx_usb_pipe_list {
+ struct cvmx_usb_pipe *head;
+ struct cvmx_usb_pipe *tail;
+};
+
+struct cvmx_usb_tx_fifo {
+ struct {
+ int channel;
+ int size;
+ uint64_t address;
+ } entry[MAX_CHANNELS+1];
+ int head;
+ int tail;
+};
+
+/**
+ * struct cvmx_usb_internal_state - the state of the USB block
+ *
+ * init_flags: Flags passed to initialize.
+ * index: Which USB block this is for.
+ * idle_hardware_channels: Bit set for every idle hardware channel.
+ * usbcx_hprt: Stored port status so we don't need to read a CSR to
+ * determine splits.
+ * pipe_for_channel: Map channels to pipes.
+ * free_transaction_head: List of free transactions head.
+ * free_transaction_tail: List of free transactions tail.
+ * pipe: Storage for pipes.
+ * transaction: Storage for transactions.
+ * callback: User global callbacks.
+ * callback_data: User data for each callback.
+ * indent: Used by debug output to indent functions.
+ * port_status: Last port status used for change notification.
+ * free_pipes: List of all pipes that are currently closed.
+ * idle_pipes: List of open pipes that have no transactions.
+ * active_pipes: Active pipes indexed by transfer type.
+ * frame_number: Increments every SOF interrupt for time keeping.
+ * active_split: Points to the current active split, or NULL.
+ */
+struct cvmx_usb_internal_state {
+ int init_flags;
+ int index;
+ int idle_hardware_channels;
+ union cvmx_usbcx_hprt usbcx_hprt;
+ struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS];
+ struct cvmx_usb_transaction *free_transaction_head;
+ struct cvmx_usb_transaction *free_transaction_tail;
+ struct cvmx_usb_pipe pipe[MAX_PIPES];
+ struct cvmx_usb_transaction transaction[MAX_TRANSACTIONS];
+ cvmx_usb_callback_func_t callback[__CVMX_USB_CALLBACK_END];
+ void *callback_data[__CVMX_USB_CALLBACK_END];
+ int indent;
+ struct cvmx_usb_port_status port_status;
+ struct cvmx_usb_pipe_list free_pipes;
+ struct cvmx_usb_pipe_list idle_pipes;
+ struct cvmx_usb_pipe_list active_pipes[4];
+ uint64_t frame_number;
+ struct cvmx_usb_transaction *active_split;
+ struct cvmx_usb_tx_fifo periodic;
+ struct cvmx_usb_tx_fifo nonperiodic;
+};
+
struct octeon_hcd {
spinlock_t lock;
struct cvmx_usb_state usb;
@@ -31,6 +538,2914 @@ struct octeon_hcd {
struct list_head dequeue_list;
};
+/* This macro spins on a field waiting for it to reach a value */
+#define CVMX_WAIT_FOR_FIELD32(address, type, field, op, value, timeout_usec)\
+ ({int result; \
+ do { \
+ uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \
+ octeon_get_clock_rate() / 1000000; \
+ type c; \
+ while (1) { \
+ c.u32 = __cvmx_usb_read_csr32(usb, address); \
+ if (c.s.field op (value)) { \
+ result = 0; \
+ break; \
+ } else if (cvmx_get_cycle() > done) { \
+ result = -1; \
+ break; \
+ } else \
+ cvmx_wait(100); \
+ } \
+ } while (0); \
+ result; })
+
+/*
+ * This macro logically sets a single field in a CSR. It does the sequence
+ * read, modify, and write
+ */
+#define USB_SET_FIELD32(address, type, field, value) \
+ do { \
+ type c; \
+ c.u32 = __cvmx_usb_read_csr32(usb, address); \
+ c.s.field = value; \
+ __cvmx_usb_write_csr32(usb, address, c.u32); \
+ } while (0)
+
+/* Returns the IO address to push/pop stuff data from the FIFOs */
+#define USB_FIFO_ADDRESS(channel, usb_index) (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000)
+
+static int octeon_usb_get_clock_type(void)
+{
+ switch (cvmx_sysinfo_get()->board_type) {
+ case CVMX_BOARD_TYPE_BBGW_REF:
+ case CVMX_BOARD_TYPE_LANAI2_A:
+ case CVMX_BOARD_TYPE_LANAI2_U:
+ case CVMX_BOARD_TYPE_LANAI2_G:
+ case CVMX_BOARD_TYPE_UBNT_E100:
+ return USB_CLOCK_TYPE_CRYSTAL_12;
+ }
+ return USB_CLOCK_TYPE_REF_48;
+}
+
+/**
+ * Read a USB 32bit CSR. It performs the necessary address swizzle
+ * for 32bit CSRs and logs the value in a readable format if
+ * debugging is on.
+ *
+ * @usb: USB block this access is for
+ * @address: 64bit address to read
+ *
+ * Returns: Result of the read
+ */
+static inline uint32_t __cvmx_usb_read_csr32(struct cvmx_usb_internal_state *usb,
+ uint64_t address)
+{
+ uint32_t result = cvmx_read64_uint32(address ^ 4);
+ return result;
+}
+
+
+/**
+ * Write a USB 32bit CSR. It performs the necessary address
+ * swizzle for 32bit CSRs and logs the value in a readable format
+ * if debugging is on.
+ *
+ * @usb: USB block this access is for
+ * @address: 64bit address to write
+ * @value: Value to write
+ */
+static inline void __cvmx_usb_write_csr32(struct cvmx_usb_internal_state *usb,
+ uint64_t address, uint32_t value)
+{
+ cvmx_write64_uint32(address ^ 4, value);
+ cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
+}
+
+
+/**
+ * Read a USB 64bit CSR. It logs the value in a readable format if
+ * debugging is on.
+ *
+ * @usb: USB block this access is for
+ * @address: 64bit address to read
+ *
+ * Returns: Result of the read
+ */
+static inline uint64_t __cvmx_usb_read_csr64(struct cvmx_usb_internal_state *usb,
+ uint64_t address)
+{
+ uint64_t result = cvmx_read64_uint64(address);
+ return result;
+}
+
+
+/**
+ * Write a USB 64bit CSR. It logs the value in a readable format
+ * if debugging is on.
+ *
+ * @usb: USB block this access is for
+ * @address: 64bit address to write
+ * @value: Value to write
+ */
+static inline void __cvmx_usb_write_csr64(struct cvmx_usb_internal_state *usb,
+ uint64_t address, uint64_t value)
+{
+ cvmx_write64_uint64(address, value);
+}
+
+/**
+ * Return non zero if this pipe connects to a non HIGH speed
+ * device through a high speed hub.
+ *
+ * @usb: USB block this access is for
+ * @pipe: Pipe to check
+ *
+ * Returns: Non zero if we need to do split transactions
+ */
+static inline int __cvmx_usb_pipe_needs_split(struct cvmx_usb_internal_state *usb, struct cvmx_usb_pipe *pipe)
+{
+ return ((pipe->device_speed != CVMX_USB_SPEED_HIGH) && (usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH));
+}
+
+
+/**
+ * Trivial utility function to return the correct PID for a pipe
+ *
+ * @pipe: pipe to check
+ *
+ * Returns: PID for pipe
+ */
+static inline int __cvmx_usb_get_data_pid(struct cvmx_usb_pipe *pipe)
+{
+ if (pipe->pid_toggle)
+ return 2; /* Data1 */
+ else
+ return 0; /* Data0 */
+}
+
+
+/**
+ * Return the number of USB ports supported by this Octeon
+ * chip. If the chip doesn't support USB, or is not supported
+ * by this API, a zero will be returned. Most Octeon chips
+ * support one usb port, but some support two ports.
+ * cvmx_usb_initialize() must be called on independent
+ * struct cvmx_usb_state.
+ *
+ * Returns: Number of port, zero if usb isn't supported
+ */
+static int cvmx_usb_get_num_ports(void)
+{
+ int arch_ports = 0;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX))
+ arch_ports = 1;
+ else if (OCTEON_IS_MODEL(OCTEON_CN52XX))
+ arch_ports = 2;
+ else if (OCTEON_IS_MODEL(OCTEON_CN50XX))
+ arch_ports = 1;
+ else if (OCTEON_IS_MODEL(OCTEON_CN31XX))
+ arch_ports = 1;
+ else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
+ arch_ports = 1;
+ else
+ arch_ports = 0;
+
+ return arch_ports;
+}
+
+
+/**
+ * Allocate a usb transaction for use
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ *
+ * Returns: Transaction or NULL
+ */
+static inline struct cvmx_usb_transaction *__cvmx_usb_alloc_transaction(struct cvmx_usb_internal_state *usb)
+{
+ struct cvmx_usb_transaction *t;
+ t = usb->free_transaction_head;
+ if (t) {
+ usb->free_transaction_head = t->next;
+ if (!usb->free_transaction_head)
+ usb->free_transaction_tail = NULL;
+ }
+ if (t) {
+ memset(t, 0, sizeof(*t));
+ t->flags = __CVMX_USB_TRANSACTION_FLAGS_IN_USE;
+ }
+ return t;
+}
+
+
+/**
+ * Free a usb transaction
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @transaction:
+ * Transaction to free
+ */
+static inline void __cvmx_usb_free_transaction(struct cvmx_usb_internal_state *usb,
+ struct cvmx_usb_transaction *transaction)
+{
+ transaction->flags = 0;
+ transaction->prev = NULL;
+ transaction->next = NULL;
+ if (usb->free_transaction_tail)
+ usb->free_transaction_tail->next = transaction;
+ else
+ usb->free_transaction_head = transaction;
+ usb->free_transaction_tail = transaction;
+}
+
+
+/**
+ * Add a pipe to the tail of a list
+ * @list: List to add pipe to
+ * @pipe: Pipe to add
+ */
+static inline void __cvmx_usb_append_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe)
+{
+ pipe->next = NULL;
+ pipe->prev = list->tail;
+ if (list->tail)
+ list->tail->next = pipe;
+ else
+ list->head = pipe;
+ list->tail = pipe;
+}
+
+
+/**
+ * Remove a pipe from a list
+ * @list: List to remove pipe from
+ * @pipe: Pipe to remove
+ */
+static inline void __cvmx_usb_remove_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe)
+{
+ if (list->head == pipe) {
+ list->head = pipe->next;
+ pipe->next = NULL;
+ if (list->head)
+ list->head->prev = NULL;
+ else
+ list->tail = NULL;
+ } else if (list->tail == pipe) {
+ list->tail = pipe->prev;
+ list->tail->next = NULL;
+ pipe->prev = NULL;
+ } else {
+ pipe->prev->next = pipe->next;
+ pipe->next->prev = pipe->prev;
+ pipe->prev = NULL;
+ pipe->next = NULL;
+ }
+}
+
+
+/**
+ * Initialize a USB port for use. This must be called before any
+ * other access to the Octeon USB port is made. The port starts
+ * off in the disabled state.
+ *
+ * @state: Pointer to an empty struct cvmx_usb_state
+ * that will be populated by the initialize call.
+ * This structure is then passed to all other USB
+ * functions.
+ * @usb_port_number:
+ * Which Octeon USB port to initialize.
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_initialize(struct cvmx_usb_state *state,
+ int usb_port_number)
+{
+ union cvmx_usbnx_clk_ctl usbn_clk_ctl;
+ union cvmx_usbnx_usbp_ctl_status usbn_usbp_ctl_status;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+ enum cvmx_usb_initialize_flags flags = 0;
+
+ /* Make sure that state is large enough to store the internal state */
+ if (sizeof(*state) < sizeof(*usb))
+ return -EINVAL;
+ /* At first allow 0-1 for the usb port number */
+ if ((usb_port_number < 0) || (usb_port_number > 1))
+ return -EINVAL;
+ /* For all chips except 52XX there is only one port */
+ if (!OCTEON_IS_MODEL(OCTEON_CN52XX) && (usb_port_number > 0))
+ return -EINVAL;
+ /* Try to determine clock type automatically */
+ if (octeon_usb_get_clock_type() == USB_CLOCK_TYPE_CRYSTAL_12) {
+ /* Only 12 MHZ crystals are supported */
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI;
+ } else {
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND;
+
+ switch (octeon_usb_get_clock_type()) {
+ case USB_CLOCK_TYPE_REF_12:
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ;
+ break;
+ case USB_CLOCK_TYPE_REF_24:
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ;
+ break;
+ case USB_CLOCK_TYPE_REF_48:
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ }
+
+ memset(usb, 0, sizeof(*usb));
+ usb->init_flags = flags;
+
+ /* Initialize the USB state structure */
+ {
+ int i;
+ usb->index = usb_port_number;
+
+ /* Initialize the transaction double linked list */
+ usb->free_transaction_head = NULL;
+ usb->free_transaction_tail = NULL;
+ for (i = 0; i < MAX_TRANSACTIONS; i++)
+ __cvmx_usb_free_transaction(usb, usb->transaction + i);
+ for (i = 0; i < MAX_PIPES; i++)
+ __cvmx_usb_append_pipe(&usb->free_pipes, usb->pipe + i);
+ }
+
+ /*
+ * Power On Reset and PHY Initialization
+ *
+ * 1. Wait for DCOK to assert (nothing to do)
+ *
+ * 2a. Write USBN0/1_CLK_CTL[POR] = 1 and
+ * USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0
+ */
+ usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
+ usbn_clk_ctl.s.por = 1;
+ usbn_clk_ctl.s.hrst = 0;
+ usbn_clk_ctl.s.prst = 0;
+ usbn_clk_ctl.s.hclk_rst = 0;
+ usbn_clk_ctl.s.enable = 0;
+ /*
+ * 2b. Select the USB reference clock/crystal parameters by writing
+ * appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON]
+ */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) {
+ /*
+ * The USB port uses 12/24/48MHz 2.5V board clock
+ * source at USB_XO. USB_XI should be tied to GND.
+ * Most Octeon evaluation boards require this setting
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
+ /* From CN31XX,CN30XX manual */
+ usbn_clk_ctl.cn31xx.p_rclk = 1;
+ usbn_clk_ctl.cn31xx.p_xenbn = 0;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
+ /* From CN56XX,CN50XX manual */
+ usbn_clk_ctl.cn56xx.p_rtype = 2;
+ else
+ /* From CN52XX manual */
+ usbn_clk_ctl.cn52xx.p_rtype = 1;
+
+ switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) {
+ case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ:
+ usbn_clk_ctl.s.p_c_sel = 0;
+ break;
+ case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ:
+ usbn_clk_ctl.s.p_c_sel = 1;
+ break;
+ case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ:
+ usbn_clk_ctl.s.p_c_sel = 2;
+ break;
+ }
+ } else {
+ /*
+ * The USB port uses a 12MHz crystal as clock source
+ * at USB_XO and USB_XI
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
+ /* From CN31XX,CN30XX manual */
+ usbn_clk_ctl.cn31xx.p_rclk = 1;
+ usbn_clk_ctl.cn31xx.p_xenbn = 1;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
+ /* From CN56XX,CN50XX manual */
+ usbn_clk_ctl.cn56xx.p_rtype = 0;
+ else
+ /* From CN52XX manual */
+ usbn_clk_ctl.cn52xx.p_rtype = 0;
+
+ usbn_clk_ctl.s.p_c_sel = 0;
+ }
+ /*
+ * 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and
+ * setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down
+ * such that USB is as close as possible to 125Mhz
+ */
+ {
+ int divisor = (octeon_get_clock_rate()+125000000-1)/125000000;
+ /* Lower than 4 doesn't seem to work properly */
+ if (divisor < 4)
+ divisor = 4;
+ usbn_clk_ctl.s.divide = divisor;
+ usbn_clk_ctl.s.divide2 = 0;
+ }
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */
+ usbn_clk_ctl.s.hclk_rst = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */
+ cvmx_wait(64);
+ /*
+ * 3. Program the power-on reset field in the USBN clock-control
+ * register:
+ * USBN_CLK_CTL[POR] = 0
+ */
+ usbn_clk_ctl.s.por = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 4. Wait 1 ms for PHY clock to start */
+ mdelay(1);
+ /*
+ * 5. Program the Reset input from automatic test equipment field in the
+ * USBP control and status register:
+ * USBN_USBP_CTL_STATUS[ATE_RESET] = 1
+ */
+ usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index));
+ usbn_usbp_ctl_status.s.ate_reset = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
+ usbn_usbp_ctl_status.u64);
+ /* 6. Wait 10 cycles */
+ cvmx_wait(10);
+ /*
+ * 7. Clear ATE_RESET field in the USBN clock-control register:
+ * USBN_USBP_CTL_STATUS[ATE_RESET] = 0
+ */
+ usbn_usbp_ctl_status.s.ate_reset = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
+ usbn_usbp_ctl_status.u64);
+ /*
+ * 8. Program the PHY reset field in the USBN clock-control register:
+ * USBN_CLK_CTL[PRST] = 1
+ */
+ usbn_clk_ctl.s.prst = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /*
+ * 9. Program the USBP control and status register to select host or
+ * device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for
+ * device
+ */
+ usbn_usbp_ctl_status.s.hst_mode = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
+ usbn_usbp_ctl_status.u64);
+ /* 10. Wait 1 us */
+ udelay(1);
+ /*
+ * 11. Program the hreset_n field in the USBN clock-control register:
+ * USBN_CLK_CTL[HRST] = 1
+ */
+ usbn_clk_ctl.s.hrst = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 12. Proceed to USB core initialization */
+ usbn_clk_ctl.s.enable = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ udelay(1);
+
+ /*
+ * USB Core Initialization
+ *
+ * 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to
+ * determine USB core configuration parameters.
+ *
+ * Nothing needed
+ *
+ * 2. Program the following fields in the global AHB configuration
+ * register (USBC_GAHBCFG)
+ * DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode
+ * Burst length, USBC_GAHBCFG[HBSTLEN] = 0
+ * Nonperiodic TxFIFO empty level (slave mode only),
+ * USBC_GAHBCFG[NPTXFEMPLVL]
+ * Periodic TxFIFO empty level (slave mode only),
+ * USBC_GAHBCFG[PTXFEMPLVL]
+ * Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1
+ */
+ {
+ union cvmx_usbcx_gahbcfg usbcx_gahbcfg;
+ /* Due to an errata, CN31XX doesn't support DMA */
+ if (OCTEON_IS_MODEL(OCTEON_CN31XX))
+ usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA;
+ usbcx_gahbcfg.u32 = 0;
+ usbcx_gahbcfg.s.dmaen = !(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA);
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ /* Only use one channel with non DMA */
+ usb->idle_hardware_channels = 0x1;
+ else if (OCTEON_IS_MODEL(OCTEON_CN5XXX))
+ /* CN5XXX have an errata with channel 3 */
+ usb->idle_hardware_channels = 0xf7;
+ else
+ usb->idle_hardware_channels = 0xff;
+ usbcx_gahbcfg.s.hbstlen = 0;
+ usbcx_gahbcfg.s.nptxfemplvl = 1;
+ usbcx_gahbcfg.s.ptxfemplvl = 1;
+ usbcx_gahbcfg.s.glblintrmsk = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index),
+ usbcx_gahbcfg.u32);
+ }
+ /*
+ * 3. Program the following fields in USBC_GUSBCFG register.
+ * HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0
+ * ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0
+ * USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5
+ * PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0
+ */
+ {
+ union cvmx_usbcx_gusbcfg usbcx_gusbcfg;
+ usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index));
+ usbcx_gusbcfg.s.toutcal = 0;
+ usbcx_gusbcfg.s.ddrsel = 0;
+ usbcx_gusbcfg.s.usbtrdtim = 0x5;
+ usbcx_gusbcfg.s.phylpwrclksel = 0;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index),
+ usbcx_gusbcfg.u32);
+ }
+ /*
+ * 4. The software must unmask the following bits in the USBC_GINTMSK
+ * register.
+ * OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1
+ * Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1
+ */
+ {
+ union cvmx_usbcx_gintmsk usbcx_gintmsk;
+ int channel;
+
+ usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index));
+ usbcx_gintmsk.s.otgintmsk = 1;
+ usbcx_gintmsk.s.modemismsk = 1;
+ usbcx_gintmsk.s.hchintmsk = 1;
+ usbcx_gintmsk.s.sofmsk = 0;
+ /* We need RX FIFO interrupts if we don't have DMA */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ usbcx_gintmsk.s.rxflvlmsk = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index),
+ usbcx_gintmsk.u32);
+
+ /*
+ * Disable all channel interrupts. We'll enable them per channel
+ * later.
+ */
+ for (channel = 0; channel < 8; channel++)
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
+ }
+
+ {
+ /*
+ * Host Port Initialization
+ *
+ * 1. Program the host-port interrupt-mask field to unmask,
+ * USBC_GINTMSK[PRTINT] = 1
+ */
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk,
+ prtintmsk, 1);
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk,
+ disconnintmsk, 1);
+ /*
+ * 2. Program the USBC_HCFG register to select full-speed host
+ * or high-speed host.
+ */
+ {
+ union cvmx_usbcx_hcfg usbcx_hcfg;
+ usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index));
+ usbcx_hcfg.s.fslssupp = 0;
+ usbcx_hcfg.s.fslspclksel = 0;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32);
+ }
+ /*
+ * 3. Program the port power bit to drive VBUS on the USB,
+ * USBC_HPRT[PRTPWR] = 1
+ */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtpwr, 1);
+
+ /*
+ * Steps 4-15 from the manual are done later in the port enable
+ */
+ }
+
+ return 0;
+}
+
+
+/**
+ * Shutdown a USB port after a call to cvmx_usb_initialize().
+ * The port should be disabled with all pipes closed when this
+ * function is called.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_shutdown(struct cvmx_usb_state *state)
+{
+ union cvmx_usbnx_clk_ctl usbn_clk_ctl;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ /* Make sure all pipes are closed */
+ if (usb->idle_pipes.head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS].head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT].head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_CONTROL].head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_BULK].head)
+ return -EBUSY;
+
+ /* Disable the clocks and put them in power on reset */
+ usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
+ usbn_clk_ctl.s.enable = 1;
+ usbn_clk_ctl.s.por = 1;
+ usbn_clk_ctl.s.hclk_rst = 1;
+ usbn_clk_ctl.s.prst = 0;
+ usbn_clk_ctl.s.hrst = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ return 0;
+}
+
+
+/**
+ * Enable a USB port. After this call succeeds, the USB port is
+ * online and servicing requests.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_enable(struct cvmx_usb_state *state)
+{
+ union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+
+ /*
+ * If the port is already enabled the just return. We don't need to do
+ * anything
+ */
+ if (usb->usbcx_hprt.s.prtena)
+ return 0;
+
+ /* If there is nothing plugged into the port then fail immediately */
+ if (!usb->usbcx_hprt.s.prtconnsts) {
+ return -ETIMEDOUT;
+ }
+
+ /* Program the port reset bit to start the reset process */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 1);
+
+ /*
+ * Wait at least 50ms (high speed), or 10ms (full speed) for the reset
+ * process to complete.
+ */
+ mdelay(50);
+
+ /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtrst, 0);
+
+ /* Wait for the USBC_HPRT[PRTENA]. */
+ if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt,
+ prtena, ==, 1, 100000))
+ return -ETIMEDOUT;
+
+ /*
+ * Read the port speed field to get the enumerated speed,
+ * USBC_HPRT[PRTSPD].
+ */
+ usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+ usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index));
+
+ /*
+ * 13. Program the USBC_GRXFSIZ register to select the size of the
+ * receive FIFO (25%).
+ */
+ USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), union cvmx_usbcx_grxfsiz,
+ rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4);
+ /*
+ * 14. Program the USBC_GNPTXFSIZ register to select the size and the
+ * start address of the non- periodic transmit FIFO for nonperiodic
+ * transactions (50%).
+ */
+ {
+ union cvmx_usbcx_gnptxfsiz siz;
+ siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index));
+ siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2;
+ siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), siz.u32);
+ }
+ /*
+ * 15. Program the USBC_HPTXFSIZ register to select the size and start
+ * address of the periodic transmit FIFO for periodic transactions
+ * (25%).
+ */
+ {
+ union cvmx_usbcx_hptxfsiz siz;
+ siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index));
+ siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4;
+ siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), siz.u32);
+ }
+ /* Flush all FIFOs */
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfnum, 0x10);
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, txfflsh, 1);
+ CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl,
+ txfflsh, ==, 0, 100);
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl, rxfflsh, 1);
+ CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), union cvmx_usbcx_grstctl,
+ rxfflsh, ==, 0, 100);
+
+ return 0;
+}
+
+
+/**
+ * Disable a USB port. After this call the USB port will not
+ * generate data transfers and will not generate events.
+ * Transactions in process will fail and call their
+ * associated callbacks.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_disable(struct cvmx_usb_state *state)
+{
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ /* Disable the port */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), union cvmx_usbcx_hprt, prtena, 1);
+ return 0;
+}
+
+
+/**
+ * Get the current state of the USB port. Use this call to
+ * determine if the usb port has anything connected, is enabled,
+ * or has some sort of error condition. The return value of this
+ * call has "changed" bits to signal of the value of some fields
+ * have changed between calls. These "changed" fields are based
+ * on the last call to cvmx_usb_set_status(). In order to clear
+ * them, you must update the status through cvmx_usb_set_status().
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ *
+ * Returns: Port status information
+ */
+static struct cvmx_usb_port_status cvmx_usb_get_status(struct cvmx_usb_state *state)
+{
+ union cvmx_usbcx_hprt usbc_hprt;
+ struct cvmx_usb_port_status result;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ memset(&result, 0, sizeof(result));
+
+ usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+ result.port_enabled = usbc_hprt.s.prtena;
+ result.port_over_current = usbc_hprt.s.prtovrcurract;
+ result.port_powered = usbc_hprt.s.prtpwr;
+ result.port_speed = usbc_hprt.s.prtspd;
+ result.connected = usbc_hprt.s.prtconnsts;
+ result.connect_change = (result.connected != usb->port_status.connected);
+
+ return result;
+}
+
+
+/**
+ * Set the current state of the USB port. The status is used as
+ * a reference for the "changed" bits returned by
+ * cvmx_usb_get_status(). Other than serving as a reference, the
+ * status passed to this function is not used. No fields can be
+ * changed through this call.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @port_status:
+ * Port status to set, most like returned by cvmx_usb_get_status()
+ */
+static void cvmx_usb_set_status(struct cvmx_usb_state *state,
+ struct cvmx_usb_port_status port_status)
+{
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+ usb->port_status = port_status;
+ return;
+}
+
+
+/**
+ * Convert a USB transaction into a handle
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @transaction:
+ * Transaction to get handle for
+ *
+ * Returns: Handle
+ */
+static inline int __cvmx_usb_get_submit_handle(struct cvmx_usb_internal_state *usb,
+ struct cvmx_usb_transaction *transaction)
+{
+ return ((unsigned long)transaction - (unsigned long)usb->transaction) /
+ sizeof(*transaction);
+}
+
+
+/**
+ * Convert a USB pipe into a handle
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe: Pipe to get handle for
+ *
+ * Returns: Handle
+ */
+static inline int __cvmx_usb_get_pipe_handle(struct cvmx_usb_internal_state *usb,
+ struct cvmx_usb_pipe *pipe)
+{
+ return ((unsigned long)pipe - (unsigned long)usb->pipe) / sizeof(*pipe);
+}
+
+
+/**
+ * Open a virtual pipe between the host and a USB device. A pipe
+ * must be opened before data can be transferred between a device
+ * and Octeon.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @device_addr:
+ * USB device address to open the pipe to
+ * (0-127).
+ * @endpoint_num:
+ * USB endpoint number to open the pipe to
+ * (0-15).
+ * @device_speed:
+ * The speed of the device the pipe is going
+ * to. This must match the device's speed,
+ * which may be different than the port speed.
+ * @max_packet: The maximum packet length the device can
+ * transmit/receive (low speed=0-8, full
+ * speed=0-1023, high speed=0-1024). This value
+ * comes from the standard endpoint descriptor
+ * field wMaxPacketSize bits <10:0>.
+ * @transfer_type:
+ * The type of transfer this pipe is for.
+ * @transfer_dir:
+ * The direction the pipe is in. This is not
+ * used for control pipes.
+ * @interval: For ISOCHRONOUS and INTERRUPT transfers,
+ * this is how often the transfer is scheduled
+ * for. All other transfers should specify
+ * zero. The units are in frames (8000/sec at
+ * high speed, 1000/sec for full speed).
+ * @multi_count:
+ * For high speed devices, this is the maximum
+ * allowed number of packet per microframe.
+ * Specify zero for non high speed devices. This
+ * value comes from the standard endpoint descriptor
+ * field wMaxPacketSize bits <12:11>.
+ * @hub_device_addr:
+ * Hub device address this device is connected
+ * to. Devices connected directly to Octeon
+ * use zero. This is only used when the device
+ * is full/low speed behind a high speed hub.
+ * The address will be of the high speed hub,
+ * not and full speed hubs after it.
+ * @hub_port: Which port on the hub the device is
+ * connected. Use zero for devices connected
+ * directly to Octeon. Like hub_device_addr,
+ * this is only used for full/low speed
+ * devices behind a high speed hub.
+ *
+ * Returns: A non negative value is a pipe handle. Negative
+ * values are error codes.
+ */
+static int cvmx_usb_open_pipe(struct cvmx_usb_state *state,
+ int device_addr, int endpoint_num,
+ enum cvmx_usb_speed device_speed, int max_packet,
+ enum cvmx_usb_transfer transfer_type,
+ enum cvmx_usb_direction transfer_dir,
+ int interval, int multi_count,
+ int hub_device_addr, int hub_port)
+{
+ struct cvmx_usb_pipe *pipe;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS)))
+ return -EINVAL;
+ if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT)))
+ return -EINVAL;
+ if (unlikely(device_speed > CVMX_USB_SPEED_LOW))
+ return -EINVAL;
+ if (unlikely((max_packet <= 0) || (max_packet > 1024)))
+ return -EINVAL;
+ if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT))
+ return -EINVAL;
+ if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) &&
+ (transfer_dir != CVMX_USB_DIRECTION_IN)))
+ return -EINVAL;
+ if (unlikely(interval < 0))
+ return -EINVAL;
+ if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval))
+ return -EINVAL;
+ if (unlikely(multi_count < 0))
+ return -EINVAL;
+ if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) &&
+ (multi_count != 0)))
+ return -EINVAL;
+ if (unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS)))
+ return -EINVAL;
+ if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT)))
+ return -EINVAL;
+
+ /* Find a free pipe */
+ pipe = usb->free_pipes.head;
+ if (!pipe)
+ return -ENOMEM;
+ __cvmx_usb_remove_pipe(&usb->free_pipes, pipe);
+ pipe->flags = __CVMX_USB_PIPE_FLAGS_OPEN;
+ if ((device_speed == CVMX_USB_SPEED_HIGH) &&
+ (transfer_dir == CVMX_USB_DIRECTION_OUT) &&
+ (transfer_type == CVMX_USB_TRANSFER_BULK))
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
+ pipe->device_addr = device_addr;
+ pipe->endpoint_num = endpoint_num;
+ pipe->device_speed = device_speed;
+ pipe->max_packet = max_packet;
+ pipe->transfer_type = transfer_type;
+ pipe->transfer_dir = transfer_dir;
+ /*
+ * All pipes use interval to rate limit NAK processing. Force an
+ * interval if one wasn't supplied
+ */
+ if (!interval)
+ interval = 1;
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ pipe->interval = interval*8;
+ /* Force start splits to be schedule on uFrame 0 */
+ pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval;
+ } else {
+ pipe->interval = interval;
+ pipe->next_tx_frame = usb->frame_number + pipe->interval;
+ }
+ pipe->multi_count = multi_count;
+ pipe->hub_device_addr = hub_device_addr;
+ pipe->hub_port = hub_port;
+ pipe->pid_toggle = 0;
+ pipe->split_sc_frame = -1;
+ __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
+
+ /*
+ * We don't need to tell the hardware about this pipe yet since
+ * it doesn't have any submitted requests
+ */
+
+ return __cvmx_usb_get_pipe_handle(usb, pipe);
+}
+
+
+/**
+ * Poll the RX FIFOs and remove data as needed. This function is only used
+ * in non DMA mode. It is very important that this function be called quickly
+ * enough to prevent FIFO overflow.
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ */
+static void __cvmx_usb_poll_rx_fifo(struct cvmx_usb_internal_state *usb)
+{
+ union cvmx_usbcx_grxstsph rx_status;
+ int channel;
+ int bytes;
+ uint64_t address;
+ uint32_t *ptr;
+
+ rx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GRXSTSPH(usb->index));
+ /* Only read data if IN data is there */
+ if (rx_status.s.pktsts != 2)
+ return;
+ /* Check if no data is available */
+ if (!rx_status.s.bcnt)
+ return;
+
+ channel = rx_status.s.chnum;
+ bytes = rx_status.s.bcnt;
+ if (!bytes)
+ return;
+
+ /* Get where the DMA engine would have written this data */
+ address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8);
+ ptr = cvmx_phys_to_ptr(address);
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes);
+
+ /* Loop writing the FIFO data for this packet into memory */
+ while (bytes > 0) {
+ *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index));
+ bytes -= 4;
+ }
+ CVMX_SYNCW;
+
+ return;
+}
+
+
+/**
+ * Fill the TX hardware fifo with data out of the software
+ * fifos
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @fifo: Software fifo to use
+ * @available: Amount of space in the hardware fifo
+ *
+ * Returns: Non zero if the hardware fifo was too small and needs
+ * to be serviced again.
+ */
+static int __cvmx_usb_fill_tx_hw(struct cvmx_usb_internal_state *usb, struct cvmx_usb_tx_fifo *fifo, int available)
+{
+ /*
+ * We're done either when there isn't anymore space or the software FIFO
+ * is empty
+ */
+ while (available && (fifo->head != fifo->tail)) {
+ int i = fifo->tail;
+ const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address);
+ uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, usb->index) ^ 4;
+ int words = available;
+
+ /* Limit the amount of data to waht the SW fifo has */
+ if (fifo->entry[i].size <= available) {
+ words = fifo->entry[i].size;
+ fifo->tail++;
+ if (fifo->tail > MAX_CHANNELS)
+ fifo->tail = 0;
+ }
+
+ /* Update the next locations and counts */
+ available -= words;
+ fifo->entry[i].address += words * 4;
+ fifo->entry[i].size -= words;
+
+ /*
+ * Write the HW fifo data. The read every three writes is due
+ * to an errata on CN3XXX chips
+ */
+ while (words > 3) {
+ cvmx_write64_uint32(csr_address, *ptr++);
+ cvmx_write64_uint32(csr_address, *ptr++);
+ cvmx_write64_uint32(csr_address, *ptr++);
+ cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
+ words -= 3;
+ }
+ cvmx_write64_uint32(csr_address, *ptr++);
+ if (--words) {
+ cvmx_write64_uint32(csr_address, *ptr++);
+ if (--words)
+ cvmx_write64_uint32(csr_address, *ptr++);
+ }
+ cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
+ }
+ return fifo->head != fifo->tail;
+}
+
+
+/**
+ * Check the hardware FIFOs and fill them as needed
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ */
+static void __cvmx_usb_poll_tx_fifo(struct cvmx_usb_internal_state *usb)
+{
+ if (usb->periodic.head != usb->periodic.tail) {
+ union cvmx_usbcx_hptxsts tx_status;
+ tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXSTS(usb->index));
+ if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, tx_status.s.ptxfspcavail))
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 1);
+ else
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, ptxfempmsk, 0);
+ }
+
+ if (usb->nonperiodic.head != usb->nonperiodic.tail) {
+ union cvmx_usbcx_gnptxsts tx_status;
+ tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXSTS(usb->index));
+ if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, tx_status.s.nptxfspcavail))
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 1);
+ else
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, nptxfempmsk, 0);
+ }
+
+ return;
+}
+
+
+/**
+ * Fill the TX FIFO with an outgoing packet
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @channel: Channel number to get packet from
+ */
+static void __cvmx_usb_fill_tx_fifo(struct cvmx_usb_internal_state *usb, int channel)
+{
+ union cvmx_usbcx_hccharx hcchar;
+ union cvmx_usbcx_hcspltx usbc_hcsplt;
+ union cvmx_usbcx_hctsizx usbc_hctsiz;
+ struct cvmx_usb_tx_fifo *fifo;
+
+ /* We only need to fill data on outbound channels */
+ hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
+ if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT)
+ return;
+
+ /* OUT Splits only have data on the start and not the complete */
+ usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index));
+ if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt)
+ return;
+
+ /*
+ * Find out how many bytes we need to fill and convert it into 32bit
+ * words.
+ */
+ usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
+ if (!usbc_hctsiz.s.xfersize)
+ return;
+
+ if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) ||
+ (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS))
+ fifo = &usb->periodic;
+ else
+ fifo = &usb->nonperiodic;
+
+ fifo->entry[fifo->head].channel = channel;
+ fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8);
+ fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2;
+ fifo->head++;
+ if (fifo->head > MAX_CHANNELS)
+ fifo->head = 0;
+
+ __cvmx_usb_poll_tx_fifo(usb);
+
+ return;
+}
+
+/**
+ * Perform channel specific setup for Control transactions. All
+ * the generic stuff will already have been done in
+ * __cvmx_usb_start_channel()
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @channel: Channel to setup
+ * @pipe: Pipe for control transaction
+ */
+static void __cvmx_usb_start_channel_control(struct cvmx_usb_internal_state *usb,
+ int channel,
+ struct cvmx_usb_pipe *pipe)
+{
+ struct cvmx_usb_transaction *transaction = pipe->head;
+ union cvmx_usb_control_header *header =
+ cvmx_phys_to_ptr(transaction->control_header);
+ int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
+ int packets_to_transfer;
+ union cvmx_usbcx_hctsizx usbc_hctsiz;
+
+ usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
+
+ switch (transaction->stage) {
+ case CVMX_USB_STAGE_NON_CONTROL:
+ case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
+ cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__);
+ break;
+ case CVMX_USB_STAGE_SETUP:
+ usbc_hctsiz.s.pid = 3; /* Setup */
+ bytes_to_transfer = sizeof(*header);
+ /* All Control operations start with a setup going OUT */
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT);
+ /*
+ * Setup send the control header instead of the buffer data. The
+ * buffer data will be used in the next stage
+ */
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header);
+ break;
+ case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
+ usbc_hctsiz.s.pid = 3; /* Setup */
+ bytes_to_transfer = 0;
+ /* All Control operations start with a setup going OUT */
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir, CVMX_USB_DIRECTION_OUT);
+ USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1);
+ break;
+ case CVMX_USB_STAGE_DATA:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ if (header->s.request_type & 0x80)
+ bytes_to_transfer = 0;
+ else if (bytes_to_transfer > pipe->max_packet)
+ bytes_to_transfer = pipe->max_packet;
+ }
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
+ union cvmx_usbcx_hccharx, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_IN :
+ CVMX_USB_DIRECTION_OUT));
+ break;
+ case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ if (!(header->s.request_type & 0x80))
+ bytes_to_transfer = 0;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
+ union cvmx_usbcx_hccharx, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_IN :
+ CVMX_USB_DIRECTION_OUT));
+ USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1);
+ break;
+ case CVMX_USB_STAGE_STATUS:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ bytes_to_transfer = 0;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_OUT :
+ CVMX_USB_DIRECTION_IN));
+ break;
+ case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ bytes_to_transfer = 0;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_OUT :
+ CVMX_USB_DIRECTION_IN));
+ USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), union cvmx_usbcx_hcspltx, compsplt, 1);
+ break;
+ }
+
+ /*
+ * Make sure the transfer never exceeds the byte limit of the hardware.
+ * Further bytes will be sent as continued transactions
+ */
+ if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
+ /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */
+ bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
+ bytes_to_transfer *= pipe->max_packet;
+ }
+
+ /*
+ * Calculate the number of packets to transfer. If the length is zero
+ * we still need to transfer one packet
+ */
+ packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
+ if (packets_to_transfer == 0)
+ packets_to_transfer = 1;
+ else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
+ /*
+ * Limit to one packet when not using DMA. Channels must be
+ * restarted between every packet for IN transactions, so there
+ * is no reason to do multiple packets in a row
+ */
+ packets_to_transfer = 1;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
+ /*
+ * Limit the number of packet and data transferred to what the
+ * hardware can handle
+ */
+ packets_to_transfer = MAX_TRANSFER_PACKETS;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ }
+
+ usbc_hctsiz.s.xfersize = bytes_to_transfer;
+ usbc_hctsiz.s.pktcnt = packets_to_transfer;
+
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
+ return;
+}
+
+
+/**
+ * Start a channel to perform the pipe's head transaction
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @channel: Channel to setup
+ * @pipe: Pipe to start
+ */
+static void __cvmx_usb_start_channel(struct cvmx_usb_internal_state *usb,
+ int channel,
+ struct cvmx_usb_pipe *pipe)
+{
+ struct cvmx_usb_transaction *transaction = pipe->head;
+
+ /* Make sure all writes to the DMA region get flushed */
+ CVMX_SYNCW;
+
+ /* Attach the channel to the pipe */
+ usb->pipe_for_channel[channel] = pipe;
+ pipe->channel = channel;
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED;
+
+ /* Mark this channel as in use */
+ usb->idle_hardware_channels &= ~(1<<channel);
+
+ /* Enable the channel interrupt bits */
+ {
+ union cvmx_usbcx_hcintx usbc_hcint;
+ union cvmx_usbcx_hcintmskx usbc_hcintmsk;
+ union cvmx_usbcx_haintmsk usbc_haintmsk;
+
+ /* Clear all channel status bits */
+ usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index), usbc_hcint.u32);
+
+ usbc_hcintmsk.u32 = 0;
+ usbc_hcintmsk.s.chhltdmsk = 1;
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
+ /*
+ * Channels need these extra interrupts when we aren't
+ * in DMA mode.
+ */
+ usbc_hcintmsk.s.datatglerrmsk = 1;
+ usbc_hcintmsk.s.frmovrunmsk = 1;
+ usbc_hcintmsk.s.bblerrmsk = 1;
+ usbc_hcintmsk.s.xacterrmsk = 1;
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /*
+ * Splits don't generate xfercompl, so we need
+ * ACK and NYET.
+ */
+ usbc_hcintmsk.s.nyetmsk = 1;
+ usbc_hcintmsk.s.ackmsk = 1;
+ }
+ usbc_hcintmsk.s.nakmsk = 1;
+ usbc_hcintmsk.s.stallmsk = 1;
+ usbc_hcintmsk.s.xfercomplmsk = 1;
+ }
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32);
+
+ /* Enable the channel interrupt to propagate */
+ usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index));
+ usbc_haintmsk.s.haintmsk |= 1<<channel;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32);
+ }
+
+ /* Setup the locations the DMA engines use */
+ {
+ uint64_t dma_address = transaction->buffer + transaction->actual_bytes;
+ if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
+ dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address);
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address);
+ }
+
+ /* Setup both the size of the transfer and the SPLIT characteristics */
+ {
+ union cvmx_usbcx_hcspltx usbc_hcsplt = {.u32 = 0};
+ union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = 0};
+ int packets_to_transfer;
+ int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
+
+ /*
+ * ISOCHRONOUS transactions store each individual transfer size
+ * in the packet structure, not the global buffer_length
+ */
+ if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
+ bytes_to_transfer = transaction->iso_packets[0].length - transaction->actual_bytes;
+
+ /*
+ * We need to do split transactions when we are talking to non
+ * high speed devices that are behind a high speed hub
+ */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /*
+ * On the start split phase (stage is even) record the
+ * frame number we will need to send the split complete.
+ * We only store the lower two bits since the time ahead
+ * can only be two frames
+ */
+ if ((transaction->stage&1) == 0) {
+ if (transaction->type == CVMX_USB_TRANSFER_BULK)
+ pipe->split_sc_frame = (usb->frame_number + 1) & 0x7f;
+ else
+ pipe->split_sc_frame = (usb->frame_number + 2) & 0x7f;
+ } else
+ pipe->split_sc_frame = -1;
+
+ usbc_hcsplt.s.spltena = 1;
+ usbc_hcsplt.s.hubaddr = pipe->hub_device_addr;
+ usbc_hcsplt.s.prtaddr = pipe->hub_port;
+ usbc_hcsplt.s.compsplt = (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE);
+
+ /*
+ * SPLIT transactions can only ever transmit one data
+ * packet so limit the transfer size to the max packet
+ * size
+ */
+ if (bytes_to_transfer > pipe->max_packet)
+ bytes_to_transfer = pipe->max_packet;
+
+ /*
+ * ISOCHRONOUS OUT splits are unique in that they limit
+ * data transfers to 188 byte chunks representing the
+ * begin/middle/end of the data or all
+ */
+ if (!usbc_hcsplt.s.compsplt &&
+ (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
+ (pipe->transfer_type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
+ /*
+ * Clear the split complete frame number as
+ * there isn't going to be a split complete
+ */
+ pipe->split_sc_frame = -1;
+ /*
+ * See if we've started this transfer and sent
+ * data
+ */
+ if (transaction->actual_bytes == 0) {
+ /*
+ * Nothing sent yet, this is either a
+ * begin or the entire payload
+ */
+ if (bytes_to_transfer <= 188)
+ /* Entire payload in one go */
+ usbc_hcsplt.s.xactpos = 3;
+ else
+ /* First part of payload */
+ usbc_hcsplt.s.xactpos = 2;
+ } else {
+ /*
+ * Continuing the previous data, we must
+ * either be in the middle or at the end
+ */
+ if (bytes_to_transfer <= 188)
+ /* End of payload */
+ usbc_hcsplt.s.xactpos = 1;
+ else
+ /* Middle of payload */
+ usbc_hcsplt.s.xactpos = 0;
+ }
+ /*
+ * Again, the transfer size is limited to 188
+ * bytes
+ */
+ if (bytes_to_transfer > 188)
+ bytes_to_transfer = 188;
+ }
+ }
+
+ /*
+ * Make sure the transfer never exceeds the byte limit of the
+ * hardware. Further bytes will be sent as continued
+ * transactions
+ */
+ if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
+ /*
+ * Round MAX_TRANSFER_BYTES to a multiple of out packet
+ * size
+ */
+ bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
+ bytes_to_transfer *= pipe->max_packet;
+ }
+
+ /*
+ * Calculate the number of packets to transfer. If the length is
+ * zero we still need to transfer one packet
+ */
+ packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
+ if (packets_to_transfer == 0)
+ packets_to_transfer = 1;
+ else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
+ /*
+ * Limit to one packet when not using DMA. Channels must
+ * be restarted between every packet for IN
+ * transactions, so there is no reason to do multiple
+ * packets in a row
+ */
+ packets_to_transfer = 1;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
+ /*
+ * Limit the number of packet and data transferred to
+ * what the hardware can handle
+ */
+ packets_to_transfer = MAX_TRANSFER_PACKETS;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ }
+
+ usbc_hctsiz.s.xfersize = bytes_to_transfer;
+ usbc_hctsiz.s.pktcnt = packets_to_transfer;
+
+ /* Update the DATA0/DATA1 toggle */
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ /*
+ * High speed pipes may need a hardware ping before they start
+ */
+ if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING)
+ usbc_hctsiz.s.dopng = 1;
+
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index), usbc_hcsplt.u32);
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
+ }
+
+ /* Setup the Host Channel Characteristics Register */
+ {
+ union cvmx_usbcx_hccharx usbc_hcchar = {.u32 = 0};
+
+ /*
+ * Set the startframe odd/even properly. This is only used for
+ * periodic
+ */
+ usbc_hcchar.s.oddfrm = usb->frame_number&1;
+
+ /*
+ * Set the number of back to back packets allowed by this
+ * endpoint. Split transactions interpret "ec" as the number of
+ * immediate retries of failure. These retries happen too
+ * quickly, so we disable these entirely for splits
+ */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ usbc_hcchar.s.ec = 1;
+ else if (pipe->multi_count < 1)
+ usbc_hcchar.s.ec = 1;
+ else if (pipe->multi_count > 3)
+ usbc_hcchar.s.ec = 3;
+ else
+ usbc_hcchar.s.ec = pipe->multi_count;
+
+ /* Set the rest of the endpoint specific settings */
+ usbc_hcchar.s.devaddr = pipe->device_addr;
+ usbc_hcchar.s.eptype = transaction->type;
+ usbc_hcchar.s.lspddev = (pipe->device_speed == CVMX_USB_SPEED_LOW);
+ usbc_hcchar.s.epdir = pipe->transfer_dir;
+ usbc_hcchar.s.epnum = pipe->endpoint_num;
+ usbc_hcchar.s.mps = pipe->max_packet;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
+ }
+
+ /* Do transaction type specific fixups as needed */
+ switch (transaction->type) {
+ case CVMX_USB_TRANSFER_CONTROL:
+ __cvmx_usb_start_channel_control(usb, channel, pipe);
+ break;
+ case CVMX_USB_TRANSFER_BULK:
+ case CVMX_USB_TRANSFER_INTERRUPT:
+ break;
+ case CVMX_USB_TRANSFER_ISOCHRONOUS:
+ if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /*
+ * ISO transactions require different PIDs depending on
+ * direction and how many packets are needed
+ */
+ if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
+ if (pipe->multi_count < 2) /* Need DATA0 */
+ USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 0);
+ else /* Need MDATA */
+ USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), union cvmx_usbcx_hctsizx, pid, 3);
+ }
+ }
+ break;
+ }
+ {
+ union cvmx_usbcx_hctsizx usbc_hctsiz = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index))};
+ transaction->xfersize = usbc_hctsiz.s.xfersize;
+ transaction->pktcnt = usbc_hctsiz.s.pktcnt;
+ }
+ /* Remeber when we start a split transaction */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ usb->active_split = transaction;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), union cvmx_usbcx_hccharx, chena, 1);
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ __cvmx_usb_fill_tx_fifo(usb, channel);
+ return;
+}
+
+
+/**
+ * Find a pipe that is ready to be scheduled to hardware.
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @list: Pipe list to search
+ * @current_frame:
+ * Frame counter to use as a time reference.
+ *
+ * Returns: Pipe or NULL if none are ready
+ */
+static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_internal_state *usb, struct cvmx_usb_pipe_list *list, uint64_t current_frame)
+{
+ struct cvmx_usb_pipe *pipe = list->head;
+ while (pipe) {
+ if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head &&
+ (pipe->next_tx_frame <= current_frame) &&
+ ((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) &&
+ (!usb->active_split || (usb->active_split == pipe->head))) {
+ CVMX_PREFETCH(pipe, 128);
+ CVMX_PREFETCH(pipe->head, 0);
+ return pipe;
+ }
+ pipe = pipe->next;
+ }
+ return NULL;
+}
+
+
+/**
+ * Called whenever a pipe might need to be scheduled to the
+ * hardware.
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @is_sof: True if this schedule was called on a SOF interrupt.
+ */
+static void __cvmx_usb_schedule(struct cvmx_usb_internal_state *usb, int is_sof)
+{
+ int channel;
+ struct cvmx_usb_pipe *pipe;
+ int need_sof;
+ enum cvmx_usb_transfer ttype;
+
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
+ /*
+ * Without DMA we need to be careful to not schedule something
+ * at the end of a frame and cause an overrun.
+ */
+ union cvmx_usbcx_hfnum hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))};
+ union cvmx_usbcx_hfir hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))};
+ if (hfnum.s.frrem < hfir.s.frint/4)
+ goto done;
+ }
+
+ while (usb->idle_hardware_channels) {
+ /* Find an idle channel */
+ channel = __fls(usb->idle_hardware_channels);
+ if (unlikely(channel > 7))
+ break;
+
+ /* Find a pipe needing service */
+ pipe = NULL;
+ if (is_sof) {
+ /*
+ * Only process periodic pipes on SOF interrupts. This
+ * way we are sure that the periodic data is sent in the
+ * beginning of the frame
+ */
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_ISOCHRONOUS, usb->frame_number);
+ if (likely(!pipe))
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_INTERRUPT, usb->frame_number);
+ }
+ if (likely(!pipe)) {
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_CONTROL, usb->frame_number);
+ if (likely(!pipe))
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_BULK, usb->frame_number);
+ }
+ if (!pipe)
+ break;
+
+ __cvmx_usb_start_channel(usb, channel, pipe);
+ }
+
+done:
+ /*
+ * Only enable SOF interrupts when we have transactions pending in the
+ * future that might need to be scheduled
+ */
+ need_sof = 0;
+ for (ttype = CVMX_USB_TRANSFER_CONTROL; ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) {
+ pipe = usb->active_pipes[ttype].head;
+ while (pipe) {
+ if (pipe->next_tx_frame > usb->frame_number) {
+ need_sof = 1;
+ break;
+ }
+ pipe = pipe->next;
+ }
+ }
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, sofmsk, need_sof);
+ return;
+}
+
+
+/**
+ * Call a user's callback for a specific reason.
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe: Pipe the callback is for or NULL
+ * @transaction:
+ * Transaction the callback is for or NULL
+ * @reason: Reason this callback is being called
+ * @complete_code:
+ * Completion code for the transaction, if any
+ */
+static void __cvmx_usb_perform_callback(struct cvmx_usb_internal_state *usb,
+ struct cvmx_usb_pipe *pipe,
+ struct cvmx_usb_transaction *transaction,
+ enum cvmx_usb_callback reason,
+ enum cvmx_usb_complete complete_code)
+{
+ cvmx_usb_callback_func_t callback = usb->callback[reason];
+ void *user_data = usb->callback_data[reason];
+ int submit_handle = -1;
+ int pipe_handle = -1;
+ int bytes_transferred = 0;
+
+ if (pipe)
+ pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);
+
+ if (transaction) {
+ submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
+ bytes_transferred = transaction->actual_bytes;
+ /* Transactions are allowed to override the default callback */
+ if ((reason == CVMX_USB_CALLBACK_TRANSFER_COMPLETE) && transaction->callback) {
+ callback = transaction->callback;
+ user_data = transaction->callback_data;
+ }
+ }
+
+ if (!callback)
+ return;
+
+ callback((struct cvmx_usb_state *)usb, reason, complete_code, pipe_handle, submit_handle,
+ bytes_transferred, user_data);
+}
+
+
+/**
+ * Signal the completion of a transaction and free it. The
+ * transaction will be removed from the pipe transaction list.
+ *
+ * @usb: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe: Pipe the transaction is on
+ * @transaction:
+ * Transaction that completed
+ * @complete_code:
+ * Completion code
+ */
+static void __cvmx_usb_perform_complete(struct cvmx_usb_internal_state *usb,
+ struct cvmx_usb_pipe *pipe,
+ struct cvmx_usb_transaction *transaction,
+ enum cvmx_usb_complete complete_code)
+{
+ /* If this was a split then clear our split in progress marker */
+ if (usb->active_split == transaction)
+ usb->active_split = NULL;
+
+ /*
+ * Isochronous transactions need extra processing as they might not be
+ * done after a single data transfer
+ */
+ if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
+ /* Update the number of bytes transferred in this ISO packet */
+ transaction->iso_packets[0].length = transaction->actual_bytes;
+ transaction->iso_packets[0].status = complete_code;
+
+ /*
+ * If there are more ISOs pending and we succeeded, schedule the
+ * next one
+ */
+ if ((transaction->iso_number_packets > 1) && (complete_code == CVMX_USB_COMPLETE_SUCCESS)) {
+ /* No bytes transferred for this packet as of yet */
+ transaction->actual_bytes = 0;
+ /* One less ISO waiting to transfer */
+ transaction->iso_number_packets--;
+ /* Increment to the next location in our packet array */
+ transaction->iso_packets++;
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
+ goto done;
+ }
+ }
+
+ /* Remove the transaction from the pipe list */
+ if (transaction->next)
+ transaction->next->prev = transaction->prev;
+ else
+ pipe->tail = transaction->prev;
+ if (transaction->prev)
+ transaction->prev->next = transaction->next;
+ else
+ pipe->head = transaction->next;
+ if (!pipe->head) {
+ __cvmx_usb_remove_pipe(usb->active_pipes + pipe->transfer_type, pipe);
+ __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
+
+ }
+ __cvmx_usb_perform_callback(usb, pipe, transaction,
+ CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
+ complete_code);
+ __cvmx_usb_free_transaction(usb, transaction);
+done:
+ return;
+}
+
+
+/**
+ * Submit a usb transaction to a pipe. Called for all types
+ * of transactions.
+ *
+ * @usb:
+ * @pipe_handle:
+ * Which pipe to submit to. Will be validated in this function.
+ * @type: Transaction type
+ * @buffer: User buffer for the transaction
+ * @buffer_length:
+ * User buffer's length in bytes
+ * @control_header:
+ * For control transactions, the 8 byte standard header
+ * @iso_start_frame:
+ * For ISO transactions, the start frame
+ * @iso_number_packets:
+ * For ISO, the number of packet in the transaction.
+ * @iso_packets:
+ * A description of each ISO packet
+ * @callback: User callback to call when the transaction completes
+ * @user_data: User's data for the callback
+ *
+ * Returns: Submit handle or negative on failure. Matches the result
+ * in the external API.
+ */
+static int __cvmx_usb_submit_transaction(struct cvmx_usb_internal_state *usb,
+ int pipe_handle,
+ enum cvmx_usb_transfer type,
+ uint64_t buffer,
+ int buffer_length,
+ uint64_t control_header,
+ int iso_start_frame,
+ int iso_number_packets,
+ struct cvmx_usb_iso_packet *iso_packets,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
+{
+ int submit_handle;
+ struct cvmx_usb_transaction *transaction;
+ struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
+
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
+ if (unlikely(pipe->transfer_type != type))
+ return -EINVAL;
+
+ transaction = __cvmx_usb_alloc_transaction(usb);
+ if (unlikely(!transaction))
+ return -ENOMEM;
+
+ transaction->type = type;
+ transaction->buffer = buffer;
+ transaction->buffer_length = buffer_length;
+ transaction->control_header = control_header;
+ /* FIXME: This is not used, implement it. */
+ transaction->iso_start_frame = iso_start_frame;
+ transaction->iso_number_packets = iso_number_packets;
+ transaction->iso_packets = iso_packets;
+ transaction->callback = callback;
+ transaction->callback_data = user_data;
+ if (transaction->type == CVMX_USB_TRANSFER_CONTROL)
+ transaction->stage = CVMX_USB_STAGE_SETUP;
+ else
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
+
+ transaction->next = NULL;
+ if (pipe->tail) {
+ transaction->prev = pipe->tail;
+ transaction->prev->next = transaction;
+ } else {
+ if (pipe->next_tx_frame < usb->frame_number)
+ pipe->next_tx_frame = usb->frame_number + pipe->interval -
+ (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
+ transaction->prev = NULL;
+ pipe->head = transaction;
+ __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
+ __cvmx_usb_append_pipe(usb->active_pipes + pipe->transfer_type, pipe);
+ }
+ pipe->tail = transaction;
+
+ submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
+
+ /* We may need to schedule the pipe if this was the head of the pipe */
+ if (!transaction->prev)
+ __cvmx_usb_schedule(usb, 0);
+
+ return submit_handle;
+}
+
+
+/**
+ * Call to submit a USB Bulk transfer to a pipe.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe_handle:
+ * Handle to the pipe for the transfer.
+ * @buffer: Physical address of the data buffer in
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
+ * @buffer_length:
+ * Length of buffer in bytes.
+ * @callback: Function to call when this transaction
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
+ * @user_data: User supplied data returned when the
+ * callback is called. This is only used if
+ * callback in not NULL.
+ *
+ * Returns: A submitted transaction handle or negative on
+ * failure. Negative values are error codes.
+ */
+static int cvmx_usb_submit_bulk(struct cvmx_usb_state *state, int pipe_handle,
+ uint64_t buffer, int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
+{
+ int submit_handle;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(!buffer))
+ return -EINVAL;
+ if (unlikely(buffer_length < 0))
+ return -EINVAL;
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_BULK,
+ buffer,
+ buffer_length,
+ 0, /* control_header */
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ callback,
+ user_data);
+ return submit_handle;
+}
+
+
+/**
+ * Call to submit a USB Interrupt transfer to a pipe.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe_handle:
+ * Handle to the pipe for the transfer.
+ * @buffer: Physical address of the data buffer in
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
+ * @buffer_length:
+ * Length of buffer in bytes.
+ * @callback: Function to call when this transaction
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
+ * @user_data: User supplied data returned when the
+ * callback is called. This is only used if
+ * callback in not NULL.
+ *
+ * Returns: A submitted transaction handle or negative on
+ * failure. Negative values are error codes.
+ */
+static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *state,
+ int pipe_handle, uint64_t buffer,
+ int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
+{
+ int submit_handle;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(!buffer))
+ return -EINVAL;
+ if (unlikely(buffer_length < 0))
+ return -EINVAL;
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_INTERRUPT,
+ buffer,
+ buffer_length,
+ 0, /* control_header */
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ callback,
+ user_data);
+ return submit_handle;
+}
+
+
+/**
+ * Call to submit a USB Control transfer to a pipe.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe_handle:
+ * Handle to the pipe for the transfer.
+ * @control_header:
+ * USB 8 byte control header physical address.
+ * Note that this is NOT A POINTER, but the
+ * full 64bit physical address of the buffer.
+ * @buffer: Physical address of the data buffer in
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
+ * @buffer_length:
+ * Length of buffer in bytes.
+ * @callback: Function to call when this transaction
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
+ * @user_data: User supplied data returned when the
+ * callback is called. This is only used if
+ * callback in not NULL.
+ *
+ * Returns: A submitted transaction handle or negative on
+ * failure. Negative values are error codes.
+ */
+static int cvmx_usb_submit_control(struct cvmx_usb_state *state,
+ int pipe_handle, uint64_t control_header,
+ uint64_t buffer, int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
+{
+ int submit_handle;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+ union cvmx_usb_control_header *header =
+ cvmx_phys_to_ptr(control_header);
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(!control_header))
+ return -EINVAL;
+ /* Some drivers send a buffer with a zero length. God only knows why */
+ if (unlikely(buffer && (buffer_length < 0)))
+ return -EINVAL;
+ if (unlikely(!buffer && (buffer_length != 0)))
+ return -EINVAL;
+ if ((header->s.request_type & 0x80) == 0)
+ buffer_length = le16_to_cpu(header->s.length);
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_CONTROL,
+ buffer,
+ buffer_length,
+ control_header,
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ callback,
+ user_data);
+ return submit_handle;
+}
+
+
+/**
+ * Call to submit a USB Isochronous transfer to a pipe.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe_handle:
+ * Handle to the pipe for the transfer.
+ * @start_frame:
+ * Number of frames into the future to schedule
+ * this transaction.
+ * @number_packets:
+ * Number of sequential packets to transfer.
+ * "packets" is a pointer to an array of this
+ * many packet structures.
+ * @packets: Description of each transfer packet as
+ * defined by struct cvmx_usb_iso_packet. The array
+ * pointed to here must stay valid until the
+ * complete callback is called.
+ * @buffer: Physical address of the data buffer in
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
+ * @buffer_length:
+ * Length of buffer in bytes.
+ * @callback: Function to call when this transaction
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
+ * @user_data: User supplied data returned when the
+ * callback is called. This is only used if
+ * callback in not NULL.
+ *
+ * Returns: A submitted transaction handle or negative on
+ * failure. Negative values are error codes.
+ */
+static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *state,
+ int pipe_handle, int start_frame,
+ int number_packets, struct
+ cvmx_usb_iso_packet packets[],
+ uint64_t buffer, int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
+{
+ int submit_handle;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(start_frame < 0))
+ return -EINVAL;
+ if (unlikely(number_packets < 1))
+ return -EINVAL;
+ if (unlikely(!packets))
+ return -EINVAL;
+ if (unlikely(!buffer))
+ return -EINVAL;
+ if (unlikely(buffer_length < 0))
+ return -EINVAL;
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_ISOCHRONOUS,
+ buffer,
+ buffer_length,
+ 0, /* control_header */
+ start_frame,
+ number_packets,
+ packets,
+ callback,
+ user_data);
+ return submit_handle;
+}
+
+
+/**
+ * Cancel one outstanding request in a pipe. Canceling a request
+ * can fail if the transaction has already completed before cancel
+ * is called. Even after a successful cancel call, it may take
+ * a frame or two for the cvmx_usb_poll() function to call the
+ * associated callback.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe_handle:
+ * Pipe handle to cancel requests in.
+ * @submit_handle:
+ * Handle to transaction to cancel, returned by the submit
+ * function.
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_cancel(struct cvmx_usb_state *state, int pipe_handle,
+ int submit_handle)
+{
+ struct cvmx_usb_transaction *transaction;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+ struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
+
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
+ if (unlikely((submit_handle < 0) || (submit_handle >= MAX_TRANSACTIONS)))
+ return -EINVAL;
+
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
+
+ transaction = usb->transaction + submit_handle;
+
+ /* Fail if this transaction already completed */
+ if (unlikely((transaction->flags & __CVMX_USB_TRANSACTION_FLAGS_IN_USE) == 0))
+ return -EINVAL;
+
+ /*
+ * If the transaction is the HEAD of the queue and scheduled. We need to
+ * treat it special
+ */
+ if ((pipe->head == transaction) &&
+ (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) {
+ union cvmx_usbcx_hccharx usbc_hcchar;
+
+ usb->pipe_for_channel[pipe->channel] = NULL;
+ pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
+
+ CVMX_SYNCW;
+
+ usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index));
+ /*
+ * If the channel isn't enabled then the transaction already
+ * completed.
+ */
+ if (usbc_hcchar.s.chena) {
+ usbc_hcchar.s.chdis = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index), usbc_hcchar.u32);
+ }
+ }
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_CANCEL);
+ return 0;
+}
+
+
+/**
+ * Cancel all outstanding requests in a pipe. Logically all this
+ * does is call cvmx_usb_cancel() in a loop.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe_handle:
+ * Pipe handle to cancel requests in.
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_cancel_all(struct cvmx_usb_state *state, int pipe_handle)
+{
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+ struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
+
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
+
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
+
+ /* Simply loop through and attempt to cancel each transaction */
+ while (pipe->head) {
+ int result = cvmx_usb_cancel(state, pipe_handle,
+ __cvmx_usb_get_submit_handle(usb, pipe->head));
+ if (unlikely(result != 0))
+ return result;
+ }
+ return 0;
+}
+
+
+/**
+ * Close a pipe created with cvmx_usb_open_pipe().
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @pipe_handle:
+ * Pipe handle to close.
+ *
+ * Returns: 0 or a negative error code. EBUSY is returned if the pipe has
+ * outstanding transfers.
+ */
+static int cvmx_usb_close_pipe(struct cvmx_usb_state *state, int pipe_handle)
+{
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+ struct cvmx_usb_pipe *pipe = usb->pipe + pipe_handle;
+
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
+
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
+
+ /* Fail if the pipe has pending transactions */
+ if (unlikely(pipe->head))
+ return -EBUSY;
+
+ pipe->flags = 0;
+ __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
+ __cvmx_usb_append_pipe(&usb->free_pipes, pipe);
+
+ return 0;
+}
+
+
+/**
+ * Register a function to be called when various USB events occur.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ * @reason: Which event to register for.
+ * @callback: Function to call when the event occurs.
+ * @user_data: User data parameter to the function.
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_register_callback(struct cvmx_usb_state *state,
+ enum cvmx_usb_callback reason,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
+{
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ if (unlikely(reason >= __CVMX_USB_CALLBACK_END))
+ return -EINVAL;
+ if (unlikely(!callback))
+ return -EINVAL;
+
+ usb->callback[reason] = callback;
+ usb->callback_data[reason] = user_data;
+
+ return 0;
+}
+
+
+/**
+ * Get the current USB protocol level frame number. The frame
+ * number is always in the range of 0-0x7ff.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ *
+ * Returns: USB frame number
+ */
+static int cvmx_usb_get_frame_number(struct cvmx_usb_state *state)
+{
+ int frame_number;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+ union cvmx_usbcx_hfnum usbc_hfnum;
+
+ usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
+ frame_number = usbc_hfnum.s.frnum;
+
+ return frame_number;
+}
+
+
+/**
+ * Poll a channel for status
+ *
+ * @usb: USB device
+ * @channel: Channel to poll
+ *
+ * Returns: Zero on success
+ */
+static int __cvmx_usb_poll_channel(struct cvmx_usb_internal_state *usb, int channel)
+{
+ union cvmx_usbcx_hcintx usbc_hcint;
+ union cvmx_usbcx_hctsizx usbc_hctsiz;
+ union cvmx_usbcx_hccharx usbc_hcchar;
+ struct cvmx_usb_pipe *pipe;
+ struct cvmx_usb_transaction *transaction;
+ int bytes_this_transfer;
+ int bytes_in_last_packet;
+ int packets_processed;
+ int buffer_space_left;
+
+ /* Read the interrupt status bits for the channel */
+ usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
+
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
+ usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
+
+ if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) {
+ /*
+ * There seems to be a bug in CN31XX which can cause
+ * interrupt IN transfers to get stuck until we do a
+ * write of HCCHARX without changing things
+ */
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
+ return 0;
+ }
+
+ /*
+ * In non DMA mode the channels don't halt themselves. We need
+ * to manually disable channels that are left running
+ */
+ if (!usbc_hcint.s.chhltd) {
+ if (usbc_hcchar.s.chena) {
+ union cvmx_usbcx_hcintmskx hcintmsk;
+ /* Disable all interrupts except CHHLTD */
+ hcintmsk.u32 = 0;
+ hcintmsk.s.chhltdmsk = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), hcintmsk.u32);
+ usbc_hcchar.s.chdis = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
+ return 0;
+ } else if (usbc_hcint.s.xfercompl) {
+ /*
+ * Successful IN/OUT with transfer complete.
+ * Channel halt isn't needed.
+ */
+ } else {
+ cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", usb->index, channel);
+ return 0;
+ }
+ }
+ } else {
+ /*
+ * There is are no interrupts that we need to process when the
+ * channel is still running
+ */
+ if (!usbc_hcint.s.chhltd)
+ return 0;
+ }
+
+ /* Disable the channel interrupts now that it is done */
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
+ usb->idle_hardware_channels |= (1<<channel);
+
+ /* Make sure this channel is tied to a valid pipe */
+ pipe = usb->pipe_for_channel[channel];
+ CVMX_PREFETCH(pipe, 0);
+ CVMX_PREFETCH(pipe, 128);
+ if (!pipe)
+ return 0;
+ transaction = pipe->head;
+ CVMX_PREFETCH(transaction, 0);
+
+ /*
+ * Disconnect this pipe from the HW channel. Later the schedule
+ * function will figure out which pipe needs to go
+ */
+ usb->pipe_for_channel[channel] = NULL;
+ pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
+
+ /*
+ * Read the channel config info so we can figure out how much data
+ * transfered
+ */
+ usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
+ usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
+
+ /*
+ * Calculating the number of bytes successfully transferred is dependent
+ * on the transfer direction
+ */
+ packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt;
+ if (usbc_hcchar.s.epdir) {
+ /*
+ * IN transactions are easy. For every byte received the
+ * hardware decrements xfersize. All we need to do is subtract
+ * the current value of xfersize from its starting value and we
+ * know how many bytes were written to the buffer
+ */
+ bytes_this_transfer = transaction->xfersize - usbc_hctsiz.s.xfersize;
+ } else {
+ /*
+ * OUT transaction don't decrement xfersize. Instead pktcnt is
+ * decremented on every successful packet send. The hardware
+ * does this when it receives an ACK, or NYET. If it doesn't
+ * receive one of these responses pktcnt doesn't change
+ */
+ bytes_this_transfer = packets_processed * usbc_hcchar.s.mps;
+ /*
+ * The last packet may not be a full transfer if we didn't have
+ * enough data
+ */
+ if (bytes_this_transfer > transaction->xfersize)
+ bytes_this_transfer = transaction->xfersize;
+ }
+ /* Figure out how many bytes were in the last packet of the transfer */
+ if (packets_processed)
+ bytes_in_last_packet = bytes_this_transfer - (packets_processed-1) * usbc_hcchar.s.mps;
+ else
+ bytes_in_last_packet = bytes_this_transfer;
+
+ /*
+ * As a special case, setup transactions output the setup header, not
+ * the user's data. For this reason we don't count setup data as bytes
+ * transferred
+ */
+ if ((transaction->stage == CVMX_USB_STAGE_SETUP) ||
+ (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE))
+ bytes_this_transfer = 0;
+
+ /*
+ * Add the bytes transferred to the running total. It is important that
+ * bytes_this_transfer doesn't count any data that needs to be
+ * retransmitted
+ */
+ transaction->actual_bytes += bytes_this_transfer;
+ if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
+ buffer_space_left = transaction->iso_packets[0].length - transaction->actual_bytes;
+ else
+ buffer_space_left = transaction->buffer_length - transaction->actual_bytes;
+
+ /*
+ * We need to remember the PID toggle state for the next transaction.
+ * The hardware already updated it for the next transaction
+ */
+ pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0);
+
+ /*
+ * For high speed bulk out, assume the next transaction will need to do
+ * a ping before proceeding. If this isn't true the ACK processing below
+ * will clear this flag
+ */
+ if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
+ (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
+ (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT))
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
+
+ if (usbc_hcint.s.stall) {
+ /*
+ * STALL as a response means this transaction cannot be
+ * completed because the device can't process transactions. Tell
+ * the user. Any data that was transferred will be counted on
+ * the actual bytes transferred
+ */
+ pipe->pid_toggle = 0;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_STALL);
+ } else if (usbc_hcint.s.xacterr) {
+ /*
+ * We know at least one packet worked if we get a ACK or NAK.
+ * Reset the retry counter
+ */
+ if (usbc_hcint.s.nak || usbc_hcint.s.ack)
+ transaction->retries = 0;
+ transaction->retries++;
+ if (transaction->retries > MAX_RETRIES) {
+ /*
+ * XactErr as a response means the device signaled
+ * something wrong with the transfer. For example, PID
+ * toggle errors cause these
+ */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_XACTERR);
+ } else {
+ /*
+ * If this was a split then clear our split in progress
+ * marker
+ */
+ if (usb->active_split == transaction)
+ usb->active_split = NULL;
+ /*
+ * Rewind to the beginning of the transaction by anding
+ * off the split complete bit
+ */
+ transaction->stage &= ~1;
+ pipe->split_sc_frame = -1;
+ pipe->next_tx_frame += pipe->interval;
+ if (pipe->next_tx_frame < usb->frame_number)
+ pipe->next_tx_frame = usb->frame_number + pipe->interval -
+ (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
+ }
+ } else if (usbc_hcint.s.bblerr) {
+ /* Babble Error (BblErr) */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_BABBLEERR);
+ } else if (usbc_hcint.s.datatglerr) {
+ /* We'll retry the exact same transaction again */
+ transaction->retries++;
+ } else if (usbc_hcint.s.nyet) {
+ /*
+ * NYET as a response is only allowed in three cases: as a
+ * response to a ping, as a response to a split transaction, and
+ * as a response to a bulk out. The ping case is handled by
+ * hardware, so we only have splits and bulk out
+ */
+ if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ transaction->retries = 0;
+ /*
+ * If there is more data to go then we need to try
+ * again. Otherwise this transaction is complete
+ */
+ if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet))
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ } else {
+ /*
+ * Split transactions retry the split complete 4 times
+ * then rewind to the start split and do the entire
+ * transactions again
+ */
+ transaction->retries++;
+ if ((transaction->retries & 0x3) == 0) {
+ /*
+ * Rewind to the beginning of the transaction by
+ * anding off the split complete bit
+ */
+ transaction->stage &= ~1;
+ pipe->split_sc_frame = -1;
+ }
+ }
+ } else if (usbc_hcint.s.ack) {
+ transaction->retries = 0;
+ /*
+ * The ACK bit can only be checked after the other error bits.
+ * This is because a multi packet transfer may succeed in a
+ * number of packets and then get a different response on the
+ * last packet. In this case both ACK and the last response bit
+ * will be set. If none of the other response bits is set, then
+ * the last packet must have been an ACK
+ *
+ * Since we got an ACK, we know we don't need to do a ping on
+ * this pipe
+ */
+ pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING;
+
+ switch (transaction->type) {
+ case CVMX_USB_TRANSFER_CONTROL:
+ switch (transaction->stage) {
+ case CVMX_USB_STAGE_NON_CONTROL:
+ case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
+ /* This should be impossible */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
+ break;
+ case CVMX_USB_STAGE_SETUP:
+ pipe->pid_toggle = 1;
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ transaction->stage = CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE;
+ else {
+ union cvmx_usb_control_header *header =
+ cvmx_phys_to_ptr(transaction->control_header);
+ if (header->s.length)
+ transaction->stage = CVMX_USB_STAGE_DATA;
+ else
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ }
+ break;
+ case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
+ {
+ union cvmx_usb_control_header *header =
+ cvmx_phys_to_ptr(transaction->control_header);
+ if (header->s.length)
+ transaction->stage = CVMX_USB_STAGE_DATA;
+ else
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ }
+ break;
+ case CVMX_USB_STAGE_DATA:
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ transaction->stage = CVMX_USB_STAGE_DATA_SPLIT_COMPLETE;
+ /*
+ * For setup OUT data that are splits,
+ * the hardware doesn't appear to count
+ * transferred data. Here we manually
+ * update the data transferred
+ */
+ if (!usbc_hcchar.s.epdir) {
+ if (buffer_space_left < pipe->max_packet)
+ transaction->actual_bytes += buffer_space_left;
+ else
+ transaction->actual_bytes += pipe->max_packet;
+ }
+ } else if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
+ pipe->pid_toggle = 1;
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ }
+ break;
+ case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
+ if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
+ pipe->pid_toggle = 1;
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ } else {
+ transaction->stage = CVMX_USB_STAGE_DATA;
+ }
+ break;
+ case CVMX_USB_STAGE_STATUS:
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ transaction->stage = CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE;
+ else
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ break;
+ case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ break;
+ }
+ break;
+ case CVMX_USB_TRANSFER_BULK:
+ case CVMX_USB_TRANSFER_INTERRUPT:
+ /*
+ * The only time a bulk transfer isn't complete when it
+ * finishes with an ACK is during a split transaction.
+ * For splits we need to continue the transfer if more
+ * data is needed
+ */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL)
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
+ else {
+ if (buffer_space_left && (bytes_in_last_packet == pipe->max_packet))
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
+ else {
+ if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ }
+ } else {
+ if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
+ (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
+ (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
+ (usbc_hcint.s.nak))
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
+ if (!buffer_space_left || (bytes_in_last_packet < pipe->max_packet)) {
+ if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ }
+ break;
+ case CVMX_USB_TRANSFER_ISOCHRONOUS:
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /*
+ * ISOCHRONOUS OUT splits don't require a
+ * complete split stage. Instead they use a
+ * sequence of begin OUT splits to transfer the
+ * data 188 bytes at a time. Once the transfer
+ * is complete, the pipe sleeps until the next
+ * schedule interval
+ */
+ if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
+ /*
+ * If no space left or this wasn't a max
+ * size packet then this transfer is
+ * complete. Otherwise start it again to
+ * send the next 188 bytes
+ */
+ if (!buffer_space_left || (bytes_this_transfer < 188)) {
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ } else {
+ if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) {
+ /*
+ * We are in the incoming data
+ * phase. Keep getting data
+ * until we run out of space or
+ * get a small packet
+ */
+ if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ } else
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
+ }
+ } else {
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ break;
+ }
+ } else if (usbc_hcint.s.nak) {
+ /*
+ * If this was a split then clear our split in progress marker.
+ */
+ if (usb->active_split == transaction)
+ usb->active_split = NULL;
+ /*
+ * NAK as a response means the device couldn't accept the
+ * transaction, but it should be retried in the future. Rewind
+ * to the beginning of the transaction by anding off the split
+ * complete bit. Retry in the next interval
+ */
+ transaction->retries = 0;
+ transaction->stage &= ~1;
+ pipe->next_tx_frame += pipe->interval;
+ if (pipe->next_tx_frame < usb->frame_number)
+ pipe->next_tx_frame = usb->frame_number + pipe->interval -
+ (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
+ } else {
+ struct cvmx_usb_port_status port;
+ port = cvmx_usb_get_status((struct cvmx_usb_state *)usb);
+ if (port.port_enabled) {
+ /* We'll retry the exact same transaction again */
+ transaction->retries++;
+ } else {
+ /*
+ * We get channel halted interrupts with no result bits
+ * sets when the cable is unplugged
+ */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * Poll the USB block for status and call all needed callback
+ * handlers. This function is meant to be called in the interrupt
+ * handler for the USB controller. It can also be called
+ * periodically in a loop for non-interrupt based operation.
+ *
+ * @state: USB device state populated by
+ * cvmx_usb_initialize().
+ *
+ * Returns: 0 or a negative error code.
+ */
+static int cvmx_usb_poll(struct cvmx_usb_state *state)
+{
+ union cvmx_usbcx_hfnum usbc_hfnum;
+ union cvmx_usbcx_gintsts usbc_gintsts;
+ struct cvmx_usb_internal_state *usb = (struct cvmx_usb_internal_state *)state;
+
+ CVMX_PREFETCH(usb, 0);
+ CVMX_PREFETCH(usb, 1*128);
+ CVMX_PREFETCH(usb, 2*128);
+ CVMX_PREFETCH(usb, 3*128);
+ CVMX_PREFETCH(usb, 4*128);
+
+ /* Update the frame counter */
+ usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
+ if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum)
+ usb->frame_number += 0x4000;
+ usb->frame_number &= ~0x3fffull;
+ usb->frame_number |= usbc_hfnum.s.frnum;
+
+ /* Read the pending interrupts */
+ usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index));
+
+ /* Clear the interrupts now that we know about them */
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32);
+
+ if (usbc_gintsts.s.rxflvl) {
+ /*
+ * RxFIFO Non-Empty (RxFLvl)
+ * Indicates that there is at least one packet pending to be
+ * read from the RxFIFO.
+ *
+ * In DMA mode this is handled by hardware
+ */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ __cvmx_usb_poll_rx_fifo(usb);
+ }
+ if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) {
+ /* Fill the Tx FIFOs when not in DMA mode */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ __cvmx_usb_poll_tx_fifo(usb);
+ }
+ if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) {
+ union cvmx_usbcx_hprt usbc_hprt;
+ /*
+ * Disconnect Detected Interrupt (DisconnInt)
+ * Asserted when a device disconnect is detected.
+ *
+ * Host Port Interrupt (PrtInt)
+ * The core sets this bit to indicate a change in port status of
+ * one of the O2P USB core ports in Host mode. The application
+ * must read the Host Port Control and Status (HPRT) register to
+ * determine the exact event that caused this interrupt. The
+ * application must clear the appropriate status bit in the Host
+ * Port Control and Status register to clear this bit.
+ *
+ * Call the user's port callback
+ */
+ __cvmx_usb_perform_callback(usb, NULL, NULL,
+ CVMX_USB_CALLBACK_PORT_CHANGED,
+ CVMX_USB_COMPLETE_SUCCESS);
+ /* Clear the port change bits */
+ usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+ usbc_hprt.s.prtena = 0;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), usbc_hprt.u32);
+ }
+ if (usbc_gintsts.s.hchint) {
+ /*
+ * Host Channels Interrupt (HChInt)
+ * The core sets this bit to indicate that an interrupt is
+ * pending on one of the channels of the core (in Host mode).
+ * The application must read the Host All Channels Interrupt
+ * (HAINT) register to determine the exact number of the channel
+ * on which the interrupt occurred, and then read the
+ * corresponding Host Channel-n Interrupt (HCINTn) register to
+ * determine the exact cause of the interrupt. The application
+ * must clear the appropriate status bit in the HCINTn register
+ * to clear this bit.
+ */
+ union cvmx_usbcx_haint usbc_haint;
+ usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index));
+ while (usbc_haint.u32) {
+ int channel;
+
+ channel = __fls(usbc_haint.u32);
+ __cvmx_usb_poll_channel(usb, channel);
+ usbc_haint.u32 ^= 1<<channel;
+ }
+ }
+
+ __cvmx_usb_schedule(usb, usbc_gintsts.s.sof);
+
+ return 0;
+}
+
/* convert between an HCD pointer and the corresponding struct octeon_hcd */
static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd)
{
--
1.8.4.rc3
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