The Aspeed AST2x00 can contain a ColdFire v1 coprocessor which is currently unused on OpenPower systems. This adds an alternative to the fsi-master-gpio driver that uses that coprocessor instead of bit banging from the ARM core itself. The end result is about 4 times faster. The firmware for the coprocessor and its source code can be found at https://github.com/ozbenh/cf-fsi and is system specific. Currently tested on Romulus and Palmetto systems. Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> --- drivers/fsi/Kconfig | 9 + drivers/fsi/Makefile | 1 + drivers/fsi/cf-fsi-fw.h | 131 ++ drivers/fsi/fsi-master-ast-cf.c | 1376 ++++++++++++++++++++++ include/trace/events/fsi_master_ast_cf.h | 150 +++ 5 files changed, 1667 insertions(+) create mode 100644 drivers/fsi/cf-fsi-fw.h create mode 100644 drivers/fsi/fsi-master-ast-cf.c create mode 100644 include/trace/events/fsi_master_ast_cf.h diff --git a/drivers/fsi/Kconfig b/drivers/fsi/Kconfig index 322cec393cf2..e0220d1e1357 100644 --- a/drivers/fsi/Kconfig +++ b/drivers/fsi/Kconfig @@ -27,6 +27,15 @@ config FSI_MASTER_HUB allow chaining of FSI links to an arbitrary depth. This allows for a high target device fanout. +config FSI_MASTER_AST_CF + tristate "FSI master based on Aspeed ColdFire coprocessor" + depends on GPIOLIB + depends on GPIO_ASPEED + ---help--- + This option enables a FSI master using the AST2400 and AST2500 GPIO + lines driven by the internal ColdFire coprocessor. This requires + the corresponding machine specific ColdFire firmware to be available. + config FSI_SCOM tristate "SCOM FSI client device driver" ---help--- diff --git a/drivers/fsi/Makefile b/drivers/fsi/Makefile index 75fdc6d8cfc4..62687ec86d2e 100644 --- a/drivers/fsi/Makefile +++ b/drivers/fsi/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_FSI) += fsi-core.o obj-$(CONFIG_FSI_MASTER_HUB) += fsi-master-hub.o obj-$(CONFIG_FSI_MASTER_GPIO) += fsi-master-gpio.o +obj-$(CONFIG_FSI_MASTER_AST_CF) += fsi-master-ast-cf.o obj-$(CONFIG_FSI_SCOM) += fsi-scom.o obj-$(CONFIG_FSI_SBEFIFO) += fsi-sbefifo.o obj-$(CONFIG_FSI_OCC) += fsi-occ.o diff --git a/drivers/fsi/cf-fsi-fw.h b/drivers/fsi/cf-fsi-fw.h new file mode 100644 index 000000000000..5f6cffd30861 --- /dev/null +++ b/drivers/fsi/cf-fsi-fw.h @@ -0,0 +1,131 @@ +#ifndef __CF_FSI_FW_H +#define __CF_FSI_FW_H + +/* + * uCode file layout + * + * 0000...03ff : m68k exception vectors + * 0400...04ff : Header info & boot config block + * 0500....... : Code & stack + */ + +/* + * Header info & boot config area + * + * The Header info is built into the ucode and provide version and + * platform information. + * + * the Boot config needs to be adjusted by the ARM prior to starting + * the ucode if the Command/Status area isn't at 0x320000 in CF space + * (ie. beginning of SRAM). + */ + +#define HDR_OFFSET 0x400 + +/* Info: Signature & version */ +#define HDR_SYS_SIG 0x00 /* 2 bytes system signature */ +#define SYS_SIG_ROMULUS 0x526d /* 'Rm' */ +#define SYS_SIG_WITHERSPOON 0x5773 /* 'Ws' */ +#define HDR_FW_VERS 0x02 /* 2 bytes Major.Minor */ +#define HDR_API_VERS 0x04 /* 2 bytes Major.Minor */ +#define API_VERSION_MAJ 1 /* Current version */ +#define API_VERSION_MIN 1 +#define HDR_FW_OPTIONS 0x08 /* 4 bytes option flags */ +#define FW_OPTION_TRACE_EN 0x00000001 /* FW tracing enabled */ + +/* Boot Config: Address of Command/Status area */ +#define HDR_CMD_STAT_AREA 0x80 /* 4 bytes CF address */ + +/* + * Command/Status area layout: Main part + */ + +/* Command/Status register: + * + * +---------------------------+ + * | STAT | RLEN | CLEN | CMD | + * | 8 | 8 | 8 | 8 | + * +---------------------------+ + * | | | | + * status | | | + * Response len | | + * (in bits) | | + * | | + * Command len | + * (in bits) | + * | + * Command code + * + * Due to the big endian layout, that means that a byte read will + * return the status byte + */ +#define CMD_STAT_REG 0x00 +#define CMD_REG_CMD_MASK 0x000000ff +#define CMD_REG_CMD_SHIFT 0 +#define CMD_NONE 0x00 +#define CMD_COMMAND 0x01 +#define CMD_BREAK 0x02 +#define CMD_IDLE_CLOCKS 0x03 /* clen = #clocks */ +#define CMD_INVALID 0xff +#define CMD_REG_CLEN_MASK 0x0000ff00 +#define CMD_REG_CLEN_SHIFT 8 +#define CMD_REG_RLEN_MASK 0x00ff0000 +#define CMD_REG_RLEN_SHIFT 16 +#define CMD_REG_STAT_MASK 0xff000000 +#define CMD_REG_STAT_SHIFT 24 +#define STAT_WORKING 0x00 +#define STAT_COMPLETE 0x01 +#define STAT_ERR_INVAL_CMD 0x80 +#define STAT_ERR_INVAL_IRQ 0x81 +#define STAT_ERR_MTOE 0x82 + +/* Response tag & CRC */ +#define STAT_RTAG 0x04 + +/* Response CRC */ +#define STAT_RCRC 0x05 + +/* Echo and Send delay */ +#define ECHO_DLY_REG 0x08 +#define SEND_DLY_REG 0x09 + +/* Command data area + * + * Last byte of message must be left aligned + */ +#define CMD_DATA 0x10 /* 64 bit of data */ + +/* Response data area, right aligned, unused top bits are 1 */ +#define RSP_DATA 0x20 /* 32 bit of data */ + +/* Misc */ +#define INT_CNT 0x30 /* 32-bit interrupt count */ +#define BAD_INT_VEC 0x34 +#define CF_STARTED 0x38 /* byte, set to -1 when copro started */ + +/* + * SRAM layout: GPIO arbitration part + */ +#define ARB_REG 0x40 +#define ARB_ARM_REQ 0x01 +#define ARB_ARM_ACK 0x02 + +/* + * SRAM layout: Trace buffer (debug builds only) + */ +#define TRACEBUF 0x100 +#define TR_CLKOBIT0 0xc0 +#define TR_CLKOBIT1 0xc1 +#define TR_CLKOSTART 0x82 +#define TR_OLEN 0x83 /* + len */ +#define TR_CLKZ 0x84 /* + count */ +#define TR_CLKWSTART 0x85 +#define TR_CLKTAG 0x86 /* + tag */ +#define TR_CLKDATA 0x87 /* + len */ +#define TR_CLKCRC 0x88 /* + raw crc */ +#define TR_CLKIBIT0 0x90 +#define TR_CLKIBIT1 0x91 +#define TR_END 0xff + +#endif /* __CF_FSI_FW_H */ + diff --git a/drivers/fsi/fsi-master-ast-cf.c b/drivers/fsi/fsi-master-ast-cf.c new file mode 100644 index 000000000000..6b17f27c27f6 --- /dev/null +++ b/drivers/fsi/fsi-master-ast-cf.c @@ -0,0 +1,1376 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * A FSI master controller, using a simple GPIO bit-banging interface + */ + +#include <linux/crc4.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/fsi.h> +#include <linux/gpio/consumer.h> +#include <linux/io.h> +#include <linux/irqflags.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/regmap.h> +#include <linux/firmware.h> +#include <linux/gpio/aspeed.h> +#include <linux/mfd/syscon.h> +#include <linux/of_address.h> +#include <linux/genalloc.h> + +#include "fsi-master.h" +#include "cf-fsi-fw.h" + +/* Common SCU based coprocessor control registers */ +#define SCU_COPRO_CTRL 0x100 +#define SCU_COPRO_RESET 0x00000002 +#define SCU_COPRO_CLK_EN 0x00000001 + +/* AST2500 specific ones */ +#define SCU_2500_COPRO_SEG0 0x104 +#define SCU_2500_COPRO_SEG1 0x108 +#define SCU_2500_COPRO_SEG2 0x10c +#define SCU_2500_COPRO_SEG3 0x110 +#define SCU_2500_COPRO_SEG4 0x114 +#define SCU_2500_COPRO_SEG5 0x118 +#define SCU_2500_COPRO_SEG6 0x11c +#define SCU_2500_COPRO_SEG7 0x120 +#define SCU_2500_COPRO_SEG8 0x124 +#define SCU_2500_COPRO_SEG_SWAP 0x00000001 +#define SCU_2500_COPRO_CACHE_CTL 0x128 +#define SCU_2500_COPRO_CACHE_EN 0x00000001 +#define SCU_2500_COPRO_SEG0_CACHE_EN 0x00000002 +#define SCU_2500_COPRO_SEG1_CACHE_EN 0x00000004 +#define SCU_2500_COPRO_SEG2_CACHE_EN 0x00000008 +#define SCU_2500_COPRO_SEG3_CACHE_EN 0x00000010 +#define SCU_2500_COPRO_SEG4_CACHE_EN 0x00000020 +#define SCU_2500_COPRO_SEG5_CACHE_EN 0x00000040 +#define SCU_2500_COPRO_SEG6_CACHE_EN 0x00000080 +#define SCU_2500_COPRO_SEG7_CACHE_EN 0x00000100 +#define SCU_2500_COPRO_SEG8_CACHE_EN 0x00000200 + +#define SCU_2400_COPRO_SEG0 0x104 +#define SCU_2400_COPRO_SEG2 0x108 +#define SCU_2400_COPRO_SEG4 0x10c +#define SCU_2400_COPRO_SEG6 0x110 +#define SCU_2400_COPRO_SEG8 0x114 +#define SCU_2400_COPRO_SEG_SWAP 0x80000000 +#define SCU_2400_COPRO_CACHE_CTL 0x118 +#define SCU_2400_COPRO_CACHE_EN 0x00000001 +#define SCU_2400_COPRO_SEG0_CACHE_EN 0x00000002 +#define SCU_2400_COPRO_SEG2_CACHE_EN 0x00000004 +#define SCU_2400_COPRO_SEG4_CACHE_EN 0x00000008 +#define SCU_2400_COPRO_SEG6_CACHE_EN 0x00000010 +#define SCU_2400_COPRO_SEG8_CACHE_EN 0x00000020 + +/* CVIC registers */ +#define CVIC_EN_REG 0x10 +#define CVIC_TRIG_REG 0x18 + +/* + * System register base address (needed for configuring the + * coldfire maps) + */ +#define SYSREG_BASE 0x1e600000 + +/* Amount of SRAM required */ +#define SRAM_SIZE 0x1000 + +#define LAST_ADDR_INVALID 0x1 + +struct fsi_master_acf { + struct fsi_master master; + struct device *dev; + struct regmap *scu; + struct mutex lock; /* mutex for command ordering */ + struct gpio_desc *gpio_clk; + struct gpio_desc *gpio_data; + struct gpio_desc *gpio_trans; /* Voltage translator */ + struct gpio_desc *gpio_enable; /* FSI enable */ + struct gpio_desc *gpio_mux; /* Mux control */ + uint32_t cf_mem_addr; + size_t cf_mem_size; + void __iomem *cf_mem; + void __iomem *cvic; + struct gen_pool *sram_pool; + void __iomem *sram; + bool is_ast2500; + bool external_mode; + bool trace_enabled; + uint32_t last_addr; + uint8_t t_send_delay; + uint8_t t_echo_delay; + uint32_t cvic_sw_irq; +}; +#define to_fsi_master_acf(m) container_of(m, struct fsi_master_acf, master) + +struct fsi_msg { + uint64_t msg; + uint8_t bits; +}; + +#define CREATE_TRACE_POINTS +#include <trace/events/fsi_master_ast_cf.h> + +static void msg_push_bits(struct fsi_msg *msg, uint64_t data, int bits) +{ + msg->msg <<= bits; + msg->msg |= data & ((1ull << bits) - 1); + msg->bits += bits; +} + +static void msg_push_crc(struct fsi_msg *msg) +{ + uint8_t crc; + int top; + + top = msg->bits & 0x3; + + /* start bit, and any non-aligned top bits */ + crc = crc4(0, 1 << top | msg->msg >> (msg->bits - top), top + 1); + + /* aligned bits */ + crc = crc4(crc, msg->msg, msg->bits - top); + + msg_push_bits(msg, crc, 4); +} + +static void msg_finish_cmd(struct fsi_msg *cmd) +{ + /* Left align message */ + cmd->msg <<= (64 - cmd->bits); +} + +static bool check_same_address(struct fsi_master_acf *master, int id, + uint32_t addr) +{ + /* this will also handle LAST_ADDR_INVALID */ + return master->last_addr == (((id & 0x3) << 21) | (addr & ~0x3)); +} + +static bool check_relative_address(struct fsi_master_acf *master, int id, + uint32_t addr, uint32_t *rel_addrp) +{ + uint32_t last_addr = master->last_addr; + int32_t rel_addr; + + if (last_addr == LAST_ADDR_INVALID) + return false; + + /* We may be in 23-bit addressing mode, which uses the id as the + * top two address bits. So, if we're referencing a different ID, + * use absolute addresses. + */ + if (((last_addr >> 21) & 0x3) != id) + return false; + + /* remove the top two bits from any 23-bit addressing */ + last_addr &= (1 << 21) - 1; + + /* We know that the addresses are limited to 21 bits, so this won't + * overflow the signed rel_addr */ + rel_addr = addr - last_addr; + if (rel_addr > 255 || rel_addr < -256) + return false; + + *rel_addrp = (uint32_t)rel_addr; + + return true; +} + +static void last_address_update(struct fsi_master_acf *master, + int id, bool valid, uint32_t addr) +{ + if (!valid) + master->last_addr = LAST_ADDR_INVALID; + else + master->last_addr = ((id & 0x3) << 21) | (addr & ~0x3); +} + +/* + * Encode an Absolute/Relative/Same Address command + */ +static void build_ar_command(struct fsi_master_acf *master, + struct fsi_msg *cmd, uint8_t id, + uint32_t addr, size_t size, + const void *data) +{ + int i, addr_bits, opcode_bits; + bool write = !!data; + uint8_t ds, opcode; + uint32_t rel_addr; + + cmd->bits = 0; + cmd->msg = 0; + + /* we have 21 bits of address max */ + addr &= ((1 << 21) - 1); + + /* cmd opcodes are variable length - SAME_AR is only two bits */ + opcode_bits = 3; + + if (check_same_address(master, id, addr)) { + /* we still address the byte offset within the word */ + addr_bits = 2; + opcode_bits = 2; + opcode = FSI_CMD_SAME_AR; + trace_fsi_master_acf_cmd_same_addr(master); + + } else if (check_relative_address(master, id, addr, &rel_addr)) { + /* 8 bits plus sign */ + addr_bits = 9; + addr = rel_addr; + opcode = FSI_CMD_REL_AR; + trace_fsi_master_acf_cmd_rel_addr(master, rel_addr); + + } else { + addr_bits = 21; + opcode = FSI_CMD_ABS_AR; + trace_fsi_master_acf_cmd_abs_addr(master, addr); + } + + /* + * The read/write size is encoded in the lower bits of the address + * (as it must be naturally-aligned), and the following ds bit. + * + * size addr:1 addr:0 ds + * 1 x x 0 + * 2 x 0 1 + * 4 0 1 1 + * + */ + ds = size > 1 ? 1 : 0; + addr &= ~(size - 1); + if (size == 4) + addr |= 1; + + msg_push_bits(cmd, id, 2); + msg_push_bits(cmd, opcode, opcode_bits); + msg_push_bits(cmd, write ? 0 : 1, 1); + msg_push_bits(cmd, addr, addr_bits); + msg_push_bits(cmd, ds, 1); + for (i = 0; write && i < size; i++) + msg_push_bits(cmd, ((uint8_t *)data)[i], 8); + + msg_push_crc(cmd); + msg_finish_cmd(cmd); +} + +static void build_dpoll_command(struct fsi_msg *cmd, uint8_t slave_id) +{ + cmd->bits = 0; + cmd->msg = 0; + + msg_push_bits(cmd, slave_id, 2); + msg_push_bits(cmd, FSI_CMD_DPOLL, 3); + msg_push_crc(cmd); + msg_finish_cmd(cmd); +} + +static void build_epoll_command(struct fsi_msg *cmd, uint8_t slave_id) +{ + cmd->bits = 0; + cmd->msg = 0; + + msg_push_bits(cmd, slave_id, 2); + msg_push_bits(cmd, FSI_CMD_EPOLL, 3); + msg_push_crc(cmd); + msg_finish_cmd(cmd); +} + +static void build_term_command(struct fsi_msg *cmd, uint8_t slave_id) +{ + cmd->bits = 0; + cmd->msg = 0; + + msg_push_bits(cmd, slave_id, 2); + msg_push_bits(cmd, FSI_CMD_TERM, 6); + msg_push_crc(cmd); + msg_finish_cmd(cmd); +} + +static int do_copro_command(struct fsi_master_acf *master, uint32_t op) +{ + uint32_t timeout = 10000000; + uint8_t stat; + + trace_fsi_master_acf_copro_command(master, op); + + /* Send command */ + writel(cpu_to_be32(op), master->sram + CMD_STAT_REG); + + /* Read back to avoid ordering issue */ + (void)readl(master->sram + CMD_STAT_REG); + + /* Ring doorbell if any */ + if (master->cvic) + writel(0x2, master->cvic + CVIC_TRIG_REG); + + /* Wait for status to indicate completion (or error) */ + do { + if (timeout-- == 0) { + dev_warn(master->dev, + "Timeout waiting for coprocessor completion\n"); + return -ETIMEDOUT; + } + stat = readb(master->sram + CMD_STAT_REG); + } while(stat < STAT_COMPLETE || stat == 0xff); + + if (stat == STAT_COMPLETE) + return 0; + switch(stat) { + case STAT_ERR_INVAL_CMD: + return -EINVAL; + case STAT_ERR_INVAL_IRQ: + return -EIO; + case STAT_ERR_MTOE: + return -ESHUTDOWN; + } + return -ENXIO; +} + +static int clock_zeros(struct fsi_master_acf *master, int count) +{ + while (count) { + int rc, lcnt = min(count, 255); + + rc = do_copro_command(master, + CMD_IDLE_CLOCKS | (lcnt << CMD_REG_CLEN_SHIFT)); + if (rc) + return rc; + count -= lcnt; + } + return 0; +} + +static int send_request(struct fsi_master_acf *master, struct fsi_msg *cmd, + bool is_write) +{ + u32 op; + + trace_fsi_master_acf_send_request(master, cmd, is_write); + + /* Store message into SRAM */ + writel(cpu_to_be32(cmd->msg >> 32), master->sram + CMD_DATA); + writel(cpu_to_be32(cmd->msg & 0xffffffff), master->sram + CMD_DATA + 4); + + op = CMD_COMMAND; + op |= cmd->bits << CMD_REG_CLEN_SHIFT; + if (!is_write) + op |= 32 << CMD_REG_RLEN_SHIFT; + + return do_copro_command(master, op); +} + +static int read_copro_response(struct fsi_master_acf *master, uint8_t size, + __be32 *response, u8 *tag) +{ + u8 rtag = readb(master->sram + STAT_RTAG); + u8 rcrc = readb(master->sram + STAT_RCRC); + __be32 rdata = 0; + u32 crc; + u8 ack; + + *tag = ack = rtag & 3; + + /* we have a whole message now; check CRC */ + crc = crc4(0, 1, 1); + crc = crc4(crc, rtag, 4); + if (ack == FSI_RESP_ACK && size) { + rdata = readl(master->sram + RSP_DATA); + crc = crc4(crc, be32_to_cpu(rdata), 32); + if (response) + *response = rdata; + } + crc = crc4(crc, rcrc, 4); + + trace_fsi_master_acf_copro_response(master, rtag, rcrc, rdata, crc == 0); + + if (crc) { + /* + * Check if it's all 1's or all 0's, that probably means + * the host is off + */ + if ((rtag == 0xf && rcrc == 0xf) || (rtag == 0 && rcrc == 0)) + return -ENODEV; + dev_dbg(master->dev, "Bad response CRC !\n"); + return -EAGAIN; + } + return 0; +} + +static int send_term(struct fsi_master_acf *master, uint8_t slave) +{ + struct fsi_msg cmd; + uint8_t tag; + int rc; + + build_term_command(&cmd, slave); + + rc = send_request(master, &cmd, true); + if (rc) { + dev_warn(master->dev, "Error %d sending term\n", rc); + return rc; + } + + rc = read_copro_response(master, 0, NULL, &tag); + if (rc < 0) { + dev_err(master->dev, + "TERM failed; lost communication with slave\n"); + return -EIO; + } else if (tag != FSI_RESP_ACK) { + dev_err(master->dev, "TERM failed; response %d\n", tag); + return -EIO; + } + return 0; +} + +static void dump_trace(struct fsi_master_acf *master) +{ + char trbuf[52]; + char *p; + int i; + + dev_dbg(master->dev, + "CMDSTAT:%08x RTAG=%02x RCRC=%02x RDATA=%02x #INT=%08x\n", + be32_to_cpu(readl(master->sram + CMD_STAT_REG)), + readb(master->sram + STAT_RTAG), + readb(master->sram + STAT_RCRC), + be32_to_cpu(readl(master->sram + RSP_DATA)), + be32_to_cpu(readl(master->sram + INT_CNT))); + + for (i = 0; i < 512; i++) { + uint8_t v; + if ((i % 16) == 0) + p = trbuf; + v = readb(master->sram + TRACEBUF + i); + p += sprintf(p, "%02x ", v); + if (((i % 16) == 15) || v == TR_END) + dev_dbg(master->dev, "%s\n", trbuf); + if (v == TR_END) + break; + } +} + +static int handle_response(struct fsi_master_acf *master, + uint8_t slave, uint8_t size, void *data) +{ + int busy_count = 0, rc; + int crc_err_retries = 0; + struct fsi_msg cmd; + __be32 response; + uint8_t tag; +retry: + rc = read_copro_response(master, size, &response, &tag); + + /* Handle retries on CRC errors */ + if (rc == -EAGAIN) { + /* Too many retries ? */ + if (crc_err_retries++ > FSI_CRC_ERR_RETRIES) { + /* + * Pass it up as a -EIO otherwise upper level will retry + * the whole command which isn't what we want here. + */ + rc = -EIO; + goto bail; + } + trace_fsi_master_acf_crc_rsp_error(master, crc_err_retries); + if (master->trace_enabled) + dump_trace(master); + rc = clock_zeros(master, FSI_MASTER_EPOLL_CLOCKS); + if (rc) { + dev_warn(master->dev, + "Error %d clocking zeros for E_POLL\n", rc); + return rc; + } + build_epoll_command(&cmd, slave); + rc = send_request(master, &cmd, size == 0); + if (rc) { + dev_warn(master->dev, "Error %d sending E_POLL\n", rc); + return -EIO; + } + goto retry; + } + if (rc) + return rc; + + switch (tag) { + case FSI_RESP_ACK: + if (size && data) { + if (size == 4) + *(__be32 *)data = response; + else if (size == 2) + *(__be16 *)data = response; + else + *(u8 *)data = response; + } + break; + case FSI_RESP_BUSY: + /* + * Its necessary to clock slave before issuing + * d-poll, not indicated in the hardware protocol + * spec. < 20 clocks causes slave to hang, 21 ok. + */ + dev_dbg(master->dev, "Busy, retrying...\n"); + if (master->trace_enabled) + dump_trace(master); + rc = clock_zeros(master, FSI_MASTER_DPOLL_CLOCKS); + if (rc) { + dev_warn(master->dev, + "Error %d clocking zeros for D_POLL\n", rc); + break; + } + if (busy_count++ < FSI_MASTER_MAX_BUSY) { + build_dpoll_command(&cmd, slave); + rc = send_request(master, &cmd, size == 0); + if (rc) { + dev_warn(master->dev, "Error %d sending D_POLL\n", rc); + break; + } + goto retry; + } + dev_dbg(master->dev, + "ERR slave is stuck in busy state, issuing TERM\n"); + send_term(master, slave); + rc = -EIO; + break; + + case FSI_RESP_ERRA: + dev_dbg(master->dev, "ERRA received\n"); + if (master->trace_enabled) + dump_trace(master); + rc = -EIO; + break; + case FSI_RESP_ERRC: + dev_dbg(master->dev, "ERRC received\n"); + if (master->trace_enabled) + dump_trace(master); + rc = -EAGAIN; + break; + } + bail: + if (busy_count > 0) { + trace_fsi_master_acf_poll_response_busy(master, busy_count); + } + + return rc; +} + +static int fsi_master_acf_xfer(struct fsi_master_acf *master, uint8_t slave, + struct fsi_msg *cmd, size_t resp_len, void *resp) +{ + int rc = -EAGAIN, retries = 0; + + while ((retries++) < FSI_CRC_ERR_RETRIES) { + rc = send_request(master, cmd, resp_len == 0); + if (rc) { + if (rc != -ESHUTDOWN) + dev_warn(master->dev, "Error %d sending command\n", rc); + break; + } + rc = handle_response(master, slave, resp_len, resp); + if (rc != -EAGAIN) + break; + rc = -EIO; + dev_dbg(master->dev, "ECRC retry %d\n", retries); + + /* Pace it a bit before retry */ + msleep(1); + } + + return rc; +} + +static int fsi_master_acf_read(struct fsi_master *_master, int link, + uint8_t id, uint32_t addr, void *val, + size_t size) +{ + struct fsi_master_acf *master = to_fsi_master_acf(_master); + struct fsi_msg cmd; + int rc; + + if (link != 0) + return -ENODEV; + + mutex_lock(&master->lock); + dev_dbg(master->dev, "read id %d addr %x size %d\n", id, addr, size); + build_ar_command(master, &cmd, id, addr, size, NULL); + rc = fsi_master_acf_xfer(master, id, &cmd, size, val); + last_address_update(master, id, rc == 0, addr); + if (rc) + dev_dbg(master->dev, "read id %d addr 0x%08x err: %d\n", + id, addr, rc); + mutex_unlock(&master->lock); + + return rc; +} + +static int fsi_master_acf_write(struct fsi_master *_master, int link, + uint8_t id, uint32_t addr, const void *val, + size_t size) +{ + struct fsi_master_acf *master = to_fsi_master_acf(_master); + struct fsi_msg cmd; + int rc; + + if (link != 0) + return -ENODEV; + + mutex_lock(&master->lock); + build_ar_command(master, &cmd, id, addr, size, val); + dev_dbg(master->dev, "write id %d addr %x size %d raw_data: %08x\n", + id, addr, size, *(u32 *)val); + rc = fsi_master_acf_xfer(master, id, &cmd, 0, NULL); + last_address_update(master, id, rc == 0, addr); + if (rc) + dev_dbg(master->dev, "write id %d addr 0x%08x err: %d\n", + id, addr, rc); + mutex_unlock(&master->lock); + + return rc; +} + +static int fsi_master_acf_term(struct fsi_master *_master, + int link, uint8_t id) +{ + struct fsi_master_acf *master = to_fsi_master_acf(_master); + struct fsi_msg cmd; + int rc; + + if (link != 0) + return -ENODEV; + + mutex_lock(&master->lock); + build_term_command(&cmd, id); + dev_dbg(master->dev, "term id %d\n", id); + rc = fsi_master_acf_xfer(master, id, &cmd, 0, NULL); + last_address_update(master, id, false, 0); + mutex_unlock(&master->lock); + + return rc; +} + +static int fsi_master_acf_break(struct fsi_master *_master, int link) +{ + struct fsi_master_acf *master = to_fsi_master_acf(_master); + int rc; + + if (link != 0) + return -ENODEV; + + mutex_lock(&master->lock); + if (master->external_mode) { + mutex_unlock(&master->lock); + return -EBUSY; + } + dev_dbg(master->dev, "sending BREAK\n"); + rc = do_copro_command(master, CMD_BREAK); + last_address_update(master, 0, false, 0); + mutex_unlock(&master->lock); + + /* Wait for logic reset to take effect */ + udelay(200); + + return rc; +} + +static void reset_cf(struct fsi_master_acf *master) +{ + regmap_write(master->scu, SCU_COPRO_CTRL, SCU_COPRO_RESET); + usleep_range(20,20); + regmap_write(master->scu, SCU_COPRO_CTRL, 0); + usleep_range(20,20); +} + +static void start_cf(struct fsi_master_acf *master) +{ + regmap_write(master->scu, SCU_COPRO_CTRL, SCU_COPRO_CLK_EN); +} + +static void setup_ast2500_cf_maps(struct fsi_master_acf *master) +{ + /* + * Note about byteswap setting: the bus is wired backwards, + * so setting the byteswap bit actually makes the ColdFire + * work "normally" for a BE processor, ie, put the MSB in + * the lowest address byte. + * + * We thus need to set the bit for our main memory which + * contains our program code. We create two mappings for + * the register, one with each setting. + * + * Segments 2 and 3 has a "swapped" mapping (BE) + * and 6 and 7 have a non-swapped mapping (LE) which allows + * us to avoid byteswapping register accesses since the + * registers are all LE. + */ + + /* Setup segment 0 to our memory region */ + regmap_write(master->scu, SCU_2500_COPRO_SEG0, master->cf_mem_addr | + SCU_2500_COPRO_SEG_SWAP); + + /* Segments 2 and 3 to sysregs with byteswap (for SRAM) */ + regmap_write(master->scu, SCU_2500_COPRO_SEG2, SYSREG_BASE | + SCU_2500_COPRO_SEG_SWAP); + regmap_write(master->scu, SCU_2500_COPRO_SEG3, SYSREG_BASE | 0x100000 | + SCU_2500_COPRO_SEG_SWAP); + + /* And segment 6 and 7 to sysregs no byteswap */ + regmap_write(master->scu, SCU_2500_COPRO_SEG6, SYSREG_BASE); + regmap_write(master->scu, SCU_2500_COPRO_SEG7, SYSREG_BASE | 0x100000); + + /* Memory cachable, regs and SRAM not cachable */ + regmap_write(master->scu, SCU_2500_COPRO_CACHE_CTL, + SCU_2500_COPRO_SEG0_CACHE_EN | SCU_2500_COPRO_CACHE_EN); +} + +static void setup_ast2400_cf_maps(struct fsi_master_acf *master) +{ + /* Setup segment 0 to our memory region */ + regmap_write(master->scu, SCU_2400_COPRO_SEG0, master->cf_mem_addr | + SCU_2400_COPRO_SEG_SWAP); + + /* Segments 2 to sysregs with byteswap (for SRAM) */ + regmap_write(master->scu, SCU_2400_COPRO_SEG2, SYSREG_BASE | + SCU_2400_COPRO_SEG_SWAP); + + /* And segment 6 to sysregs no byteswap */ + regmap_write(master->scu, SCU_2400_COPRO_SEG6, SYSREG_BASE); + + /* Memory cachable, regs and SRAM not cachable */ + regmap_write(master->scu, SCU_2400_COPRO_CACHE_CTL, + SCU_2400_COPRO_SEG0_CACHE_EN | SCU_2400_COPRO_CACHE_EN); +} + +static int setup_gpios_for_copro(struct fsi_master_acf *master) +{ + + int rc; + + /* This aren't under ColdFire control, just set them up appropriately */ + gpiod_direction_output(master->gpio_mux, 1); + gpiod_direction_output(master->gpio_enable, 1); + + /* Those are under ColdFire control, let it configure them */ + rc = aspeed_gpio_copro_grab_gpio(master->gpio_clk); + if (rc) { + dev_err(master->dev, "failed to assign clock gpio to coprocessor\n"); + return rc; + } + rc = aspeed_gpio_copro_grab_gpio(master->gpio_data); + if (rc) { + dev_err(master->dev, "failed to assign data gpio to coprocessor\n"); + aspeed_gpio_copro_release_gpio(master->gpio_clk); + return rc; + } + rc = aspeed_gpio_copro_grab_gpio(master->gpio_trans); + if (rc) { + dev_err(master->dev, "failed to assign trans gpio to coprocessor\n"); + aspeed_gpio_copro_release_gpio(master->gpio_clk); + aspeed_gpio_copro_release_gpio(master->gpio_data); + return rc; + } + return 0; +} + +static void release_copro_gpios(struct fsi_master_acf *master) +{ + aspeed_gpio_copro_release_gpio(master->gpio_clk); + aspeed_gpio_copro_release_gpio(master->gpio_data); + aspeed_gpio_copro_release_gpio(master->gpio_trans); +} + +static int load_copro_firmware(struct fsi_master_acf *master) +{ +#define MAX_FW_NAME 32 + char name[MAX_FW_NAME + 1] = {0}; + const struct firmware *fw; + const char *pl_name; + int rc; + + pl_name = of_get_property(dev_of_node(master->dev), "fw-name", NULL); + if (!pl_name) { + dev_err(master->dev, "Missing 'fw-name' property !\n"); + return -ENODEV; + } + snprintf(name, MAX_FW_NAME, "cf-fsi-%s.bin", pl_name); + rc = request_firmware(&fw, name, master->dev); + if (rc) { + dev_err(master->dev, "Error %d to load firwmare '%s' !\n", rc, name); + return rc; + } + if (fw->size > master->cf_mem_size) { + dev_err(master->dev, "FW size (%zd) bigger than memory reserve (%zd)\n", + fw->size, master->cf_mem_size); + rc = -ENOMEM; + } else { + memcpy_toio(master->cf_mem, fw->data, fw->size); + } + release_firmware(fw); + + return rc; +} + +static int check_firmware_image(struct fsi_master_acf *master) +{ + u32 platform_sig, fw_sig, fw_vers, fw_api, fw_options; + int rc; + + rc = of_property_read_u32(dev_of_node(master->dev), "fw-platform-sig", &platform_sig); + if (rc) { + dev_err(master->dev, "Missing 'fw-platform-sig' property\n"); + return -ENODEV; + } + + fw_sig = be16_to_cpu(readw(master->cf_mem + HDR_OFFSET + HDR_SYS_SIG)); + fw_vers = be16_to_cpu(readw(master->cf_mem + HDR_OFFSET + HDR_FW_VERS)); + fw_api = be16_to_cpu(readw(master->cf_mem + HDR_OFFSET + HDR_API_VERS)); + fw_options = be32_to_cpu(readl(master->cf_mem + HDR_OFFSET + HDR_FW_OPTIONS)); + master->trace_enabled = !!(fw_options & FW_OPTION_TRACE_EN); + + /* Check version and signature */ + dev_info(master->dev, "ColdFire initialized, firmware v%d API v%d.%d (trace %s)\n", + fw_vers, fw_api >> 8, fw_api & 0xff, + master->trace_enabled ? "enabled" : "disabled"); + + if ((fw_api >> 8) != API_VERSION_MAJ) { + dev_err(master->dev, "Unsupported coprocessor API version !\n"); + return -ENODEV; + } + + if (platform_sig != fw_sig) { + dev_err(master->dev, "Platform signature mismatch ! Want %04x got %04x\n", + platform_sig, fw_sig); + return -ENODEV; + } + return 0; +} + +static int copro_enable_sw_irq(struct fsi_master_acf *master) +{ + int timeout; + u32 val; + /* + * Enable coprocessor interrupt input. I've had problems getting the + * value to stick, so try in a loop + */ + for (timeout = 0; timeout < 10; timeout++) { + writel(0x2, master->cvic + CVIC_EN_REG); + val = readl(master->cvic + CVIC_EN_REG); + if (val & 2) + break; + msleep(1); + } + if (!(val & 2)) { + dev_err(master->dev, "Failed to enable coprocessor interrupt !\n"); + return -ENODEV; + } + return 0; +} + +static int fsi_master_acf_setup(struct fsi_master_acf *master) +{ + int timeout, rc; + u32 val; + + /* Make sure the ColdFire is stopped */ + reset_cf(master); + + /* + * Clear SRAM. This needs to happen before we setup the GPIOs + * as we might start trying to arbitrate as soon as that happens. + */ + memset_io(master->sram, 0, SRAM_SIZE); + + /* Configure GPIOs */ + rc = setup_gpios_for_copro(master); + if (rc) + return rc; + + /* Load the firmware into the reserved memory */ + rc = load_copro_firmware(master); + if (rc) + return rc; + + /* Read signature and check versions */ + rc = check_firmware_image(master); + if (rc) + return rc; + + /* Setup coldfire memory map */ + if (master->is_ast2500) + setup_ast2500_cf_maps(master); + else + setup_ast2400_cf_maps(master); + + /* Start the ColdFire */ + start_cf(master); + + /* Wait for status register to indicate command completion + * which signals the initialization is complete + */ + for (timeout = 0; timeout < 10; timeout++) { + val = readb(master->sram + CF_STARTED); + if (val) + break; + msleep(1); + }; + if (!val) { + dev_err(master->dev, "Coprocessor startup timeout !\n"); + rc = -ENODEV; + goto err; + } + + /* Configure echo & send delay */ + writeb(master->t_send_delay, master->sram + SEND_DLY_REG); + writeb(master->t_echo_delay, master->sram + ECHO_DLY_REG); + + /* Enable SW interrupt to copro if any */ + if (master->cvic) { + rc = copro_enable_sw_irq(master); + if (rc) + goto err; + } + return 0; + err: + /* An error occurred, don't leave the coprocessor running */ + reset_cf(master); + + /* Release the GPIOs */ + release_copro_gpios(master); + + return rc; +} + + +static void fsi_master_acf_terminate(struct fsi_master_acf *master) +{ + unsigned long flags; + + /* + * A GPIO arbitration requestion could come in while this is + * happening. To avoid problems, we disable interrupts so it + * cannot preempt us on this CPU + */ + + local_irq_save(flags); + + /* Stop the coprocessor */ + reset_cf(master); + + /* We mark the copro not-started */ + writel(0, master->sram + CF_STARTED); + + /* We mark the ARB register as having given up arbitration to + * deal with a potential race with the arbitration request + */ + writeb(ARB_ARM_ACK, master->sram + ARB_REG); + + local_irq_restore(flags); + + /* Return the GPIOs to the ARM */ + release_copro_gpios(master); +} + +static void fsi_master_acf_setup_external(struct fsi_master_acf *master) +{ + /* Setup GPIOs for external FSI master (FSP box) */ + gpiod_direction_output(master->gpio_mux, 0); + gpiod_direction_output(master->gpio_trans, 0); + gpiod_direction_output(master->gpio_enable, 1); + gpiod_direction_input(master->gpio_clk); + gpiod_direction_input(master->gpio_data); +} + +static int fsi_master_acf_link_enable(struct fsi_master *_master, int link) +{ + struct fsi_master_acf *master = to_fsi_master_acf(_master); + int rc = -EBUSY; + + if (link != 0) + return -ENODEV; + + mutex_lock(&master->lock); + if (!master->external_mode) { + gpiod_set_value(master->gpio_enable, 1); + rc = 0; + } + mutex_unlock(&master->lock); + + return rc; +} + +static int fsi_master_acf_link_config(struct fsi_master *_master, int link, + u8 t_send_delay, u8 t_echo_delay) +{ + struct fsi_master_acf *master = to_fsi_master_acf(_master); + + if (link != 0) + return -ENODEV; + + mutex_lock(&master->lock); + master->t_send_delay = t_send_delay; + master->t_echo_delay = t_echo_delay; + dev_dbg(master->dev, "Changing delays: send=%d echo=%d\n", + t_send_delay, t_echo_delay); + writeb(master->t_send_delay, master->sram + SEND_DLY_REG); + writeb(master->t_echo_delay, master->sram + ECHO_DLY_REG); + mutex_unlock(&master->lock); + + return 0; +} + +static ssize_t external_mode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fsi_master_acf *master = dev_get_drvdata(dev); + + return snprintf(buf, PAGE_SIZE - 1, "%u\n", + master->external_mode ? 1 : 0); +} + +static ssize_t external_mode_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct fsi_master_acf *master = dev_get_drvdata(dev); + unsigned long val; + bool external_mode; + int err; + + err = kstrtoul(buf, 0, &val); + if (err) + return err; + + external_mode = !!val; + + mutex_lock(&master->lock); + + if (external_mode == master->external_mode) { + mutex_unlock(&master->lock); + return count; + } + + master->external_mode = external_mode; + if (master->external_mode) { + fsi_master_acf_terminate(master); + fsi_master_acf_setup_external(master); + } else + fsi_master_acf_setup(master); + + mutex_unlock(&master->lock); + + fsi_master_rescan(&master->master); + + return count; +} + +static DEVICE_ATTR(external_mode, 0664, + external_mode_show, external_mode_store); + +static int fsi_master_acf_gpio_request(void *data) +{ + struct fsi_master_acf *master = data; + int timeout; + u8 val; + + /* Note: This doesn't require holding out mutex */ + + /* Write reqest */ + writeb(ARB_ARM_REQ, master->sram + ARB_REG); + + /* Read back to avoid ordering issue */ + (void)readb(master->sram + ARB_REG); + + /* + * There is a race (which does happen at boot time) when we get an + * arbitration request as we are either about to or just starting + * the coprocessor. + * + * To handle it, we first check if we are running. If not yet we + * check whether the copro is started in the SCU. + * + * If it's not started, we can basically just assume we have arbitration + * and return. Otherwise, we wait normally expecting for the arbitration + * to eventually complete. + */ + if (readl(master->sram + CF_STARTED) == 0) { + unsigned int reg = 0; + + regmap_read(master->scu, SCU_COPRO_CTRL, ®); + if (!reg & SCU_COPRO_CLK_EN) + return 0; + } + + /* Ring doorbell if any */ + if (master->cvic) + writel(0x2, master->cvic + CVIC_TRIG_REG); + + for (timeout = 0; timeout < 10000; timeout++) { + val = readb(master->sram + ARB_REG); + if (val != ARB_ARM_REQ) + break; + udelay(1); + } + + /* If it failed, override anyway */ + if (val != ARB_ARM_ACK) + dev_warn(master->dev, "GPIO request arbitration timeout\n"); + + return 0; +} + +static int fsi_master_acf_gpio_release(void *data) +{ + struct fsi_master_acf *master = data; + + /* Write release */ + writeb(0, master->sram + ARB_REG); + + /* Ring doorbell if any */ + if (master->cvic) + writel(0x2, master->cvic + CVIC_TRIG_REG); + + return 0; +} + +static void fsi_master_acf_release(struct device *dev) +{ + struct fsi_master_acf *master = to_fsi_master_acf(dev_to_fsi_master(dev)); + + /* Cleanup, stop coprocessor */ + mutex_lock(&master->lock); + fsi_master_acf_terminate(master); + aspeed_gpio_copro_set_ops(NULL, NULL); + mutex_unlock(&master->lock); + + /* Free resources */ + gen_pool_free(master->sram_pool, (unsigned long)master->sram, SRAM_SIZE); + of_node_put(dev_of_node(master->dev)); + + kfree(dev); +} + +static const struct aspeed_gpio_copro_ops fsi_master_acf_gpio_ops = { + .request_access = fsi_master_acf_gpio_request, + .release_access = fsi_master_acf_gpio_release, +}; + +static int fsi_master_acf_probe(struct platform_device *pdev) +{ + struct device_node *np, *mnode = dev_of_node(&pdev->dev); + struct genpool_data_fixed gpdf; + struct fsi_master_acf *master; + struct gpio_desc *gpio; + struct resource res; + u32 cf_mem_align; + int rc; + + master = devm_kzalloc(&pdev->dev, sizeof(*master), GFP_KERNEL); + if (!master) + return -ENOMEM; + + master->dev = &pdev->dev; + master->master.dev.parent = master->dev; + master->last_addr = LAST_ADDR_INVALID; + + /* AST2400 vs. AST2500 */ + master->is_ast2500 = of_device_is_compatible(mnode, "ibm,fsi-master-ast2500-cf"); + + /* Grab the SCU, we'll need to access it to configure the coprocessor */ + if (master->is_ast2500) + master->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2500-scu"); + else + master->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2400-scu"); + if (IS_ERR(master->scu)) { + dev_err(&pdev->dev, "failed to find SCU regmap\n"); + return PTR_ERR(master->scu); + } + + /* Grab all the GPIOs we need */ + gpio = devm_gpiod_get(&pdev->dev, "clock", 0); + if (IS_ERR(gpio)) { + dev_err(&pdev->dev, "failed to get clock gpio\n"); + return PTR_ERR(gpio); + } + master->gpio_clk = gpio; + + gpio = devm_gpiod_get(&pdev->dev, "data", 0); + if (IS_ERR(gpio)) { + dev_err(&pdev->dev, "failed to get data gpio\n"); + return PTR_ERR(gpio); + } + master->gpio_data = gpio; + + /* Optional GPIOs */ + gpio = devm_gpiod_get_optional(&pdev->dev, "trans", 0); + if (IS_ERR(gpio)) { + dev_err(&pdev->dev, "failed to get trans gpio\n"); + return PTR_ERR(gpio); + } + master->gpio_trans = gpio; + + gpio = devm_gpiod_get_optional(&pdev->dev, "enable", 0); + if (IS_ERR(gpio)) { + dev_err(&pdev->dev, "failed to get enable gpio\n"); + return PTR_ERR(gpio); + } + master->gpio_enable = gpio; + + gpio = devm_gpiod_get_optional(&pdev->dev, "mux", 0); + if (IS_ERR(gpio)) { + dev_err(&pdev->dev, "failed to get mux gpio\n"); + return PTR_ERR(gpio); + } + master->gpio_mux = gpio; + + /* Grab the reserved memory region (use DMA API instead ?) */ + np = of_parse_phandle(mnode, "memory-region", 0); + if (!np) { + dev_err(&pdev->dev, "Didn't find reserved memory\n"); + return -EINVAL; + } + rc = of_address_to_resource(np, 0, &res); + of_node_put(np); + if (rc) { + dev_err(&pdev->dev, "Couldn't address to resource for reserved memory\n"); + return -ENOMEM; + } + master->cf_mem_size = resource_size(&res); + master->cf_mem_addr = (u32)res.start; + cf_mem_align = master->is_ast2500 ? 0x00100000 : 0x00200000; + if (master->cf_mem_addr & (cf_mem_align - 1)) { + dev_err(&pdev->dev, "Reserved memory has insufficient alignment\n"); + return -ENOMEM; + } + master->cf_mem = devm_ioremap_resource(&pdev->dev, &res); + if (IS_ERR(master->cf_mem)) { + rc = PTR_ERR(master->cf_mem); + dev_err(&pdev->dev, "Error %d mapping coldfire memory\n", rc); + return rc; + } + dev_dbg(&pdev->dev, "DRAM allocation @%x\n", master->cf_mem_addr); + + /* AST2500 has a SW interrupt to the coprocessor */ + if (master->is_ast2500) { + /* Grab the CVIC (ColdFire interrupts controller) */ + np = of_parse_phandle(mnode, "cvic", 0); + if (!np) { + dev_err(&pdev->dev, "Didn't find CVIC\n"); + return -EINVAL; + } + master->cvic = devm_of_iomap(&pdev->dev, np, 0, NULL); + if (IS_ERR(master->cvic)) { + rc = PTR_ERR(master->cvic); + dev_err(&pdev->dev, "Error %d mapping CVIC\n", rc); + return rc; + } + rc = of_property_read_u32(np, "copro-sw-interrupts", + &master->cvic_sw_irq); + if (rc) { + dev_err(&pdev->dev, "Can't find coprocessor SW interrupt\n"); + return rc; + } + } + + /* Grab the SRAM */ + master->sram_pool = of_gen_pool_get(dev_of_node(&pdev->dev), "sram", 0); + if (!master->sram_pool) { + rc = -ENODEV; + dev_err(&pdev->dev, "Can't find sram pool\n"); + return rc; + } + + /* Current microcode only deals with fixed location in SRAM */ + gpdf.offset = 0; + master->sram = (void __iomem *)gen_pool_alloc_algo(master->sram_pool, SRAM_SIZE, + gen_pool_fixed_alloc, &gpdf); + if (!master->sram) { + rc = -ENOMEM; + dev_err(&pdev->dev, "Failed to allocate sram from pool\n"); + return rc; + } + dev_dbg(&pdev->dev, "SRAM allocation @%lx\n", + (unsigned long)gen_pool_virt_to_phys(master->sram_pool, + (unsigned long)master->sram)); + + /* + * Hookup with the GPIO driver for arbitration of GPIO banks + * ownership. + */ + aspeed_gpio_copro_set_ops(&fsi_master_acf_gpio_ops, master); + + /* Default FSI command delays */ + master->t_send_delay = FSI_SEND_DELAY_CLOCKS; + master->t_echo_delay = FSI_ECHO_DELAY_CLOCKS; + + master->master.n_links = 1; + master->master.flags = FSI_MASTER_FLAG_SWCLOCK; + master->master.read = fsi_master_acf_read; + master->master.write = fsi_master_acf_write; + master->master.term = fsi_master_acf_term; + master->master.send_break = fsi_master_acf_break; + master->master.link_enable = fsi_master_acf_link_enable; + master->master.link_config = fsi_master_acf_link_config; + master->master.dev.of_node = of_node_get(dev_of_node(master->dev)); + master->master.dev.release = fsi_master_acf_release; + platform_set_drvdata(pdev, master); + mutex_init(&master->lock); + + mutex_lock(&master->lock); + rc = fsi_master_acf_setup(master); + mutex_unlock(&master->lock); + if (rc) + goto release_dev; + + rc = device_create_file(&pdev->dev, &dev_attr_external_mode); + if (rc) + goto stop_copro; + + rc = fsi_master_register(&master->master); + if (!rc) + return 0; + + device_remove_file(master->dev, &dev_attr_external_mode); + + stop_copro: + fsi_master_acf_terminate(master); + release_dev: + aspeed_gpio_copro_set_ops(NULL, NULL); + gen_pool_free(master->sram_pool, (unsigned long)master->sram, SRAM_SIZE); + of_node_put(dev_of_node(master->dev)); + + return rc; +} + + +static int fsi_master_acf_remove(struct platform_device *pdev) +{ + struct fsi_master_acf *master = platform_get_drvdata(pdev); + + device_remove_file(master->dev, &dev_attr_external_mode); + + fsi_master_unregister(&master->master); + + return 0; +} + +static const struct of_device_id fsi_master_acf_match[] = { + { .compatible = "ibm,fsi-master-ast2400-cf" }, + { .compatible = "ibm,fsi-master-ast2500-cf" }, + { }, +}; + +static struct platform_driver fsi_master_acf = { + .driver = { + .name = "fsi-master-acf", + .of_match_table = fsi_master_acf_match, + }, + .probe = fsi_master_acf_probe, + .remove = fsi_master_acf_remove, +}; + +module_platform_driver(fsi_master_acf); +MODULE_LICENSE("GPL"); diff --git a/include/trace/events/fsi_master_ast_cf.h b/include/trace/events/fsi_master_ast_cf.h new file mode 100644 index 000000000000..424da0172cdd --- /dev/null +++ b/include/trace/events/fsi_master_ast_cf.h @@ -0,0 +1,150 @@ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM fsi_master_ast_cf + +#if !defined(_TRACE_FSI_MASTER_ACF_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_FSI_MASTER_ACF_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(fsi_master_acf_copro_command, + TP_PROTO(const struct fsi_master_acf *master, uint32_t op), + TP_ARGS(master, op), + TP_STRUCT__entry( + __field(int, master_idx) + __field(uint32_t, op) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + __entry->op = op; + ), + TP_printk("fsi-acf%d command %08x", + __entry->master_idx, __entry->op + ) +); + +TRACE_EVENT(fsi_master_acf_send_request, + TP_PROTO(const struct fsi_master_acf *master, const struct fsi_msg *cmd, bool is_write), + TP_ARGS(master, cmd, is_write), + TP_STRUCT__entry( + __field(int, master_idx) + __field(uint64_t, msg) + __field(u8, bits) + __field(bool, is_write) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + __entry->msg = cmd->msg; + __entry->bits = cmd->bits; + __entry->is_write = is_write; + ), + TP_printk("fsi-acf%d cmd: %016llx/%d (%c)", + __entry->master_idx, (unsigned long long)__entry->msg, + __entry->bits, __entry->is_write ? 'W' : 'R' + ) +); + +TRACE_EVENT(fsi_master_acf_copro_response, + TP_PROTO(const struct fsi_master_acf *master, u8 rtag, u8 rcrc, __be32 rdata, bool crc_ok), + TP_ARGS(master, rtag, rcrc, rdata, crc_ok), + TP_STRUCT__entry( + __field(int, master_idx) + __field(u8, rtag) + __field(u8, rcrc) + __field(u32, rdata) + __field(bool, crc_ok) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + __entry->rtag = rtag; + __entry->rcrc = rcrc; + __entry->rdata = be32_to_cpu(rdata); + __entry->crc_ok = crc_ok; + ), + TP_printk("fsi-acf%d rsp: tag=%04x crc=%04x data=%08x %c\n", + __entry->master_idx, __entry->rtag, __entry->rcrc, + __entry->rdata, __entry->crc_ok ? ' ' : '!' + ) +); + +TRACE_EVENT(fsi_master_acf_crc_rsp_error, + TP_PROTO(const struct fsi_master_acf *master, int retries), + TP_ARGS(master, retries), + TP_STRUCT__entry( + __field(int, master_idx) + __field(int, retries) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + __entry->retries = retries; + ), + TP_printk("fsi-acf%d CRC error in response retry %d", + __entry->master_idx, __entry->retries + ) +); + +TRACE_EVENT(fsi_master_acf_poll_response_busy, + TP_PROTO(const struct fsi_master_acf *master, int busy_count), + TP_ARGS(master, busy_count), + TP_STRUCT__entry( + __field(int, master_idx) + __field(int, busy_count) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + __entry->busy_count = busy_count; + ), + TP_printk("fsi-acf%d: device reported busy %d times", + __entry->master_idx, __entry->busy_count + ) +); + +TRACE_EVENT(fsi_master_acf_cmd_abs_addr, + TP_PROTO(const struct fsi_master_acf *master, u32 addr), + TP_ARGS(master, addr), + TP_STRUCT__entry( + __field(int, master_idx) + __field(u32, addr) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + __entry->addr = addr; + ), + TP_printk("fsi-acf%d: Sending ABS_ADR %06x", + __entry->master_idx, __entry->addr + ) +); + +TRACE_EVENT(fsi_master_acf_cmd_rel_addr, + TP_PROTO(const struct fsi_master_acf *master, u32 rel_addr), + TP_ARGS(master, rel_addr), + TP_STRUCT__entry( + __field(int, master_idx) + __field(u32, rel_addr) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + __entry->rel_addr = rel_addr; + ), + TP_printk("fsi-acf%d: Sending REL_ADR %03x", + __entry->master_idx, __entry->rel_addr + ) +); + +TRACE_EVENT(fsi_master_acf_cmd_same_addr, + TP_PROTO(const struct fsi_master_acf *master), + TP_ARGS(master), + TP_STRUCT__entry( + __field(int, master_idx) + ), + TP_fast_assign( + __entry->master_idx = master->master.idx; + ), + TP_printk("fsi-acf%d: Sending SAME_ADR", + __entry->master_idx + ) +); + +#endif /* _TRACE_FSI_MASTER_ACF_H */ + +#include <trace/define_trace.h> -- 2.17.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
