Hi all,
I have a question wrt the ISP116X driver. I have connected the ISP1161 device to a Micrel KS8695 ARM9 CPU. Initially it would read the lowest register of each 32 bit register twice. After debugging I found that the Chip select line didn't go high after the first read. So the 1161 never updated its internal registers. I then forced it to read from a dummy chip select during its delay and this made the registers work. Now I have another issue, where the chip never seems to enable its internal port registers. Even though I have a device plugged in. Do you have any idea why the port registers would do that? I added some debug code to the initial C file. The log printout is as follows:
My Kernel setup: Buildroot linux, using kernel 2.6.29.1
Dec 31 17:00:04 scurve syslog.info syslogd started: BusyBox v1.13.3
Dec 31 17:00:04 scurve daemon.info init: starting pid 913, tty '/dev/tty3': '/usr/bin/tail -f /var/log/messages'
Dec 31 17:00:04 scurve user.notice kernel: klogd started: BusyBox v1.13.3 (2009- 06-29 09:43:52 SAST)
Dec 31 17:00:04 scurve user.notice kernel: Linux version 2.6.29.1 (henk@Euler) ( gcc version 4.3.3 (GCC) ) #139 Sun Dec 6 08:12:03 SAST 2009
Dec 31 17:00:04 scurve user.warn kernel: CPU: ARM922T [41029220] revision 0 (ARM v4T), cr=00007177 Dec 31 17:00:04 scurve user.warn kernel: CPU: VIVT data cache, VIVT instruction cache
Dec 31 17:00:04 scurve user.warn kernel: Machine: KS8695 Centaur Development Board Dec 31 17:00:04 scurve user.warn kernel: Memory policy: ECC disabled,Data cache writeback
Dec 31 17:00:04 scurve user.debug kernel: On node 0 totalpages: 4096
Dec 31 17:00:04 scurve user.debug kernel: free_area_init_node: node 0, pgdat c04 920fc, node_mem_map c04c4000
Dec 31 17:00:04 scurve user.debug kernel: Normal zone: 32 pages used for memmap Dec 31 17:00:04 scurve user.debug kernel: Normal zone: 0 pages reserved
Dec 31 17:00:04 scurve user.debug kernel: Normal zone: 4064 pages,LIFO batch:0 Dec 31 17:00:04 scurve user.warn kernel: KS8695 ID=8695 SubID=00 Revision=01
Dec 31 17:00:04 scurve user.warn kernel: Clocks: System 125 MHz, CPU 166 MHz
Dec 31 17:00:04 scurve user.warn kernel: Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4064 Dec 31 17:00:04 scurve user.notice kernel: Kernel command line: console=ttyAM0,1 15200
Dec 31 17:00:04 scurve user.warn kernel: PID hash table entries: 64 (order: 6, 256 bytes)
Dec 31 17:00:04 scurve user.warn kernel: Console: colour dummy device 80x30
Dec 31 17:00:04 scurve user.info kernel: console [ttyAM0] enabled
Dec 31 17:00:04 scurve user.info kernel: Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)
Dec 31 17:00:04 scurve user.info kernel: Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)
Dec 31 17:00:04 scurve user.info kernel: Memory: 16MB = 16MB total
Dec 31 17:00:04 scurve user.notice kernel: Memory: 11360KB available (2264K code, 290K data, 2284K init)
Dec 31 17:00:04 scurve user.info kernel: SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Dec 31 17:00:04 scurve user.info kernel: Calibrating delay loop... 62.25 BogoMIPS (lpj=311296)
Dec 31 17:00:04 scurve user.warn kernel: Mount-cache hash table entries: 512
Dec 31 17:00:04 scurve user.info kernel: CPU: Testing write buffer coherency: ok
Dec 31 17:00:04 scurve user.info kernel: net_namespace: 520 bytes
Dec 31 17:00:04 scurve user.info kernel: NET: Registered protocol family 16
Dec 31 17:00:04 scurve user.info kernel: Micrel KS8695 Development Board initializing
Dec 31 17:00:04 scurve user.warn kernel: bio: create slab <bio-0> at 0
Dec 31 17:00:04 scurve user.notice kernel: SCSI subsystem initialized
Dec 31 17:00:04 scurve user.info kernel: usbcore: registered new interface driver usbfs
Dec 31 17:00:04 scurve user.info kernel: usbcore: registered new interface driver hub
Dec 31 17:00:04 scurve user.info kernel: usbcore: registered new device driver usb
Dec 31 17:00:04 scurve user.info kernel: NET: Registered protocol family 2
Dec 31 17:00:04 scurve user.info kernel: IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
Dec 31 17:00:04 scurve user.info kernel: TCP established hash table entries: 512 (order: 0, 4096 bytes)
Dec 31 17:00:04 scurve user.info kernel: TCP bind hash table entries: 512 (order : -1, 2048 bytes)
Dec 31 17:00:04 scurve user.info kernel: TCP: Hash tables configured (established 512 bind 512)
Dec 31 17:00:04 scurve user.info kernel: TCP reno registered
Dec 31 17:00:04 scurve user.info kernel: NET: Registered protocol family 1
Dec 31 17:00:04 scurve user.warn kernel: NetWinder Floating Point Emulator V0.97 (double precision)
Dec 31 17:00:04 scurve user.info kernel: io scheduler noop registered
Dec 31 17:00:04 scurve user.info kernel: io scheduler anticipatory registered
Dec 31 17:00:04 scurve user.info kernel: io scheduler deadline registered
Dec 31 17:00:04 scurve user.info kernel: io scheduler cfq registered (default)
Dec 31 17:00:04 scurve user.info kernel: Serial: Micrel KS8695 UART driver
Dec 31 17:00:04 scurve user.info kernel: ttyAM0 at MMIO 0xf00fe000 (irq = 8) is a KS8695 Dec 31 17:00:04 scurve user.info kernel: brd: module loaded
Dec 31 17:00:04 scurve user.info kernel: nbd: registered device at major 43
Dec 31 17:00:04 scurve user.info kernel: ks8695_ether Ethernet driver, V1.01
Dec 31 17:00:04 scurve user.info kernel: ks8695_ether ks8695_ether.0: ks8695 ethernet (WAN) MAC: 00:10:a1:86:95:11
Dec 31 17:00:04 scurve user.info kernel: ks8695_ether ks8695_ether.1: ks8695 ethernet (LAN) MAC: 00:10:a1:86:95:01
Dec 31 17:00:04 scurve user.warn kernel: Driver 'sd' needs updating - please use bus_type methods
Dec 31 17:00:04 scurve user.info kernel: SCSI Media Changer driver v0.25
Dec 31 17:00:04 scurve user.warn kernel: Driver 'ch' needs updating - please use bus_type methods
Dec 31 17:00:04 scurve user.info kernel: isp116x-hcd isp116x-hcd.0: irq 3, io base 0x01100008
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1348
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00000000
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1431
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00000000
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1436
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCREVISION [00]: 00000010
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCCONTROL [01]: 00000480
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCCMDSTAT [02]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCINTSTAT [03]: 00000004
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCINTENB [04]: 80000058
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCFMINTVL [0d]: 27782edf
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCFMREM [0e]: 00001ebf
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCFMNUM [0f]: 00000008
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCLSTHRESH [11]: 00000628
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHDESCA [12]: 19000902
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHDESCB [13]: 00060000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHSTATUS [14]: 00008000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCHWCFG [20]: 1c0b
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCDMACFG [21]: 0000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCXFERCTR [22]: 0000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCuPINT [24]: 0001
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCuPINTENB [25]: 0012
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCCHIPID [27]: 6123
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCSCRATCH [28]: 0000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCITLBUFLEN [2a]: 0000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCATLBUFLEN [2b]: 1000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCBUFSTAT [2c]: 0000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRDITL0LEN [2d]: 0000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRDITL1LEN [2e]: 0000
Dec 31 17:00:05 scurve user.debug kernel: usb usb1: default language 0x0409
Dec 31 17:00:05 scurve user.info kernel: usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
Dec 31 17:00:05 scurve user.info kernel: usb usb1: New USB devicestrings: Mfr=3 , Product=2, SerialNumber=1
Dec 31 17:00:05 scurve user.info kernel: usb usb1: Product: ISP116x Host Controller
Dec 31 17:00:05 scurve user.info kernel: usb usb1: Manufacturer: Linux 2.6.29.1 isp116x-hcd
Dec 31 17:00:05 scurve user.info kernel: usb usb1: SerialNumber: isp116x-hcd.0
Dec 31 17:00:05 scurve user.debug kernel: usb usb1: uevent
Dec 31 17:00:05 scurve user.debug kernel: 116x: GetHubDescriptor
Dec 31 17:00:05 scurve user.info kernel: hub 1-0:1.0: 2 ports detected
Dec 31 17:00:05 scurve user.debug kernel: hub 1-0:1.0: standalone hub
Dec 31 17:00:05 scurve user.debug kernel: hub 1-0:1.0: individual port power switching
Dec 31 17:00:05 scurve user.debug kernel: hub 1-0:1.0: individual port over-current protection
Dec 31 17:00:05 scurve user.debug kernel: hub 1-0:1.0: power on to power good time: 50ms
Dec 31 17:00:05 scurve user.debug kernel: 116x: GetHubStatus
Dec 31 17:00:05 scurve user.debug kernel: hub 1-0:1.0: local power source is good
Dec 31 17:00:05 scurve user.debug kernel: hub 1-0:1.0: enabling power on all ports
Dec 31 17:00:05 scurve user.debug kernel: 116x: SetPortFeature: <7>116x: USB_PORT_FEAT_POWER
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1141
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00000000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00000000
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1146
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00010101
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00000100
Dec 31 17:00:05 scurve user.debug kernel: drivers/usb/core/inode.c: creating file '001'
Dec 31 17:00:05 scurve user.info kernel: Initializing USB Mass Storage driver...
Dec 31 17:00:05 scurve user.info kernel: usbcore: registered new interface driver usb-storage
Dec 31 17:00:05 scurve user.info kernel: USB Mass Storage support registered.
Dec 31 17:00:05 scurve user.info kernel: mice: PS/2 mouse device common for all mice
Dec 31 17:00:05 scurve user.info kernel: usbcore: registered new interface driver usbhid
Dec 31 17:00:05 scurve user.info kernel: usbhid: v2.6:USB HID core driver
Dec 31 17:00:05 scurve user.info kernel: TCP cubic registered
Dec 31 17:00:05 scurve user.info kernel: NET: Registered protocol family 17
Dec 31 17:00:05 scurve user.info kernel: RPC: Registered udp transport module.
Dec 31 17:00:05 scurve user.info kernel: RPC: Registered tcp transport module.
Dec 31 17:00:05 scurve user.info kernel: Freeing init memory: 2284K
Dec 31 17:00:05 scurve user.debug kernel: 116x: GetPortStatus
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1061
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00090000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00080000
Dec 31 17:00:05 scurve user.debug kernel: 116x: GetPortStatus: port[1] 00090000
Dec 31 17:00:05 scurve user.debug kernel: 116x: ClearPortFeature: <7>116x: USB_PORT_FEAT_C_CONNECTION
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1112
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00090000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00080000
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1117
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00080000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00080000
Dec 31 17:00:05 scurve user.debug kernel: 116x: GetPortStatus
Dec 31 17:00:05 scurve user.warn kernel: HJB drivers/usb/host/isp116x-hcd.c:1061
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT1 [15]: 00080000
Dec 31 17:00:05 scurve user.debug kernel: 116x: HCRHPORT2 [16]: 00080000
Dec 31 17:00:05 scurve user.debug kernel: 116x: GetPortStatus: port[2]00080000
Dec 31 17:00:05 scurve user.debug kernel: hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000
Dec 31 17:00:08 scurve auth.info login[906]: root login on 'ttyAM0'
The source file with debug code for reference purposes:
/*
* ISP116x HCD (Host Controller Driver) for USB.
*
* Derived from the SL811 HCD, rewritten for ISP116x.
* Copyright (C) 2005 Olav Kongas <ok@xxxxxxxxxxxxxx>
*
* Portions:
* Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
* Copyright (C) 2004 David Brownell
*
* Periodic scheduling is based on Roman's OHCI code
* Copyright (C) 1999 Roman Weissgaerber
*
*/
/*
* The driver basically works. A number of people have used it with a range
* of devices.
*
* The driver passes all usbtests 1-14.
*
* Suspending/resuming of root hub via sysfs works. Remote wakeup works too.
* And suspending/resuming of platform device works too. Suspend/resume
* via HCD operations vector is not implemented.
*
* Iso transfer support is not implemented. Adding this would include
* implementing recovery from the failure to service the processed ITL
* fifo ram in time, which will involve chip reset.
*
* TODO:
+ More testing of suspend/resume.
*/
/*
ISP116x chips require certain delays between accesses to its
registers. The following timing options exist.
1. Configure your memory controller (the best)
2. Implement platform-specific delay function possibly
combined with configuring the memory controller; see
include/linux/usb-isp116x.h for more info. Some broken
memory controllers line LH7A400 SMC need this. Also,
uncomment for that to work the following
USE_PLATFORM_DELAY macro.
3. Use ndelay (easiest, poorest). For that, uncomment
the following USE_NDELAY macro.
*/
#define USE_PLATFORM_DELAY
//#define USE_NDELAY
//#define DEBUG
//#define VERBOSE
/* Transfer descriptors. See dump_ptd() for printout format */
//#define PTD_TRACE
/* enqueuing/finishing log of urbs */
//#define URB_TRACE
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/usb.h>
#include <linux/usb/isp116x.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include "../core/hcd.h"
#include "isp116x.h"
#define DRIVER_VERSION "03 Nov 2005"
#define DRIVER_DESC "ISP116x USB Host Controller Driver"
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static const char hcd_name[] = "isp116x-hcd";
/*-----------------------------------------------------------------*/
/*
Write len bytes to fifo, pad till 32-bit boundary
*/
static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len)
{
u8 *dp = (u8 *) buf;
u16 *dp2 = (u16 *) buf;
u16 w;
int quot = len % 4;
/* buffer is already in 'usb data order', which is LE. */
/* When reading buffer as u16, we have to take care byte order */
/* doesn't get mixed up */
if ((unsigned long)dp2 & 1) {
/* not aligned */
for (; len > 1; len -= 2) {
w = *dp++;
w |= *dp++ << 8;
isp116x_raw_write_data16(isp116x, w);
}
if (len)
isp116x_write_data16(isp116x, (u16) * dp);
} else {
/* aligned */
for (; len > 1; len -= 2) {
/* Keep byte order ! */
isp116x_raw_write_data16(isp116x, cpu_to_le16(*dp2++));
}
if (len)
isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2));
}
if (quot == 1 || quot == 2)
isp116x_raw_write_data16(isp116x, 0);
}
/*
Read len bytes from fifo and then read till 32-bit boundary.
*/
static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len)
{
u8 *dp = (u8 *) buf;
u16 *dp2 = (u16 *) buf;
u16 w;
int quot = len % 4;
/* buffer is already in 'usb data order', which is LE. */
/* When reading buffer as u16, we have to take care byte order */
/* doesn't get mixed up */
if ((unsigned long)dp2 & 1) {
/* not aligned */
for (; len > 1; len -= 2) {
w = isp116x_raw_read_data16(isp116x);
*dp++ = w & 0xff;
*dp++ = (w >> 8) & 0xff;
}
if (len)
*dp = 0xff & isp116x_read_data16(isp116x);
} else {
/* aligned */
for (; len > 1; len -= 2) {
/* Keep byte order! */
*dp2++ = le16_to_cpu(isp116x_raw_read_data16(isp116x));
}
if (len)
*(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x);
}
if (quot == 1 || quot == 2)
isp116x_raw_read_data16(isp116x);
}
/*
Write ptd's and data for scheduled transfers into
the fifo ram. Fifo must be empty and ready.
*/
static void pack_fifo(struct isp116x *isp116x)
{
struct isp116x_ep *ep;
struct ptd *ptd;
int buflen = isp116x->atl_last_dir == PTD_DIR_IN
? isp116x->atl_bufshrt : isp116x->atl_buflen;
isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET);
for (ep = isp116x->atl_active; ep; ep = ep->active) {
ptd = &ep->ptd;
dump_ptd(ptd);
dump_ptd_out_data(ptd, ep->data);
isp116x_write_data16(isp116x, ptd->count);
isp116x_write_data16(isp116x, ptd->mps);
isp116x_write_data16(isp116x, ptd->len);
isp116x_write_data16(isp116x, ptd->faddr);
buflen -= sizeof(struct ptd);
/* Skip writing data for last IN PTD */
if (ep->active || (isp116x->atl_last_dir != PTD_DIR_IN)) {
write_ptddata_to_fifo(isp116x, ep->data, ep->length);
buflen -= ALIGN(ep->length, 4);
}
}
BUG_ON(buflen);
}
/*
Read the processed ptd's and data from fifo ram back to
URBs' buffers. Fifo must be full and done
*/
static void unpack_fifo(struct isp116x *isp116x)
{
struct isp116x_ep *ep;
struct ptd *ptd;
int buflen = isp116x->atl_last_dir == PTD_DIR_IN
? isp116x->atl_buflen : isp116x->atl_bufshrt;
isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
isp116x_write_addr(isp116x, HCATLPORT);
for (ep = isp116x->atl_active; ep; ep = ep->active) {
ptd = &ep->ptd;
ptd->count = isp116x_read_data16(isp116x);
ptd->mps = isp116x_read_data16(isp116x);
ptd->len = isp116x_read_data16(isp116x);
ptd->faddr = isp116x_read_data16(isp116x);
buflen -= sizeof(struct ptd);
/* Skip reading data for last Setup or Out PTD */
if (ep->active || (isp116x->atl_last_dir == PTD_DIR_IN)) {
read_ptddata_from_fifo(isp116x, ep->data, ep->length);
buflen -= ALIGN(ep->length, 4);
}
dump_ptd(ptd);
dump_ptd_in_data(ptd, ep->data);
}
BUG_ON(buflen);
}
/*---------------------------------------------------------------*/
/*
Set up PTD's.
*/
static void preproc_atl_queue(struct isp116x *isp116x)
{
struct isp116x_ep *ep;
struct urb *urb;
struct ptd *ptd;
u16 len;
for (ep = isp116x->atl_active; ep; ep = ep->active) {
u16 toggle = 0, dir = PTD_DIR_SETUP;
BUG_ON(list_empty(&ep->hep->urb_list));
urb = container_of(ep->hep->urb_list.next,
struct urb, urb_list);
ptd = &ep->ptd;
len = ep->length;
ep->data = (unsigned char *)urb->transfer_buffer
+ urb->actual_length;
switch (ep->nextpid) {
case USB_PID_IN:
toggle = usb_gettoggle(urb->dev, ep->epnum, 0);
dir = PTD_DIR_IN;
break;
case USB_PID_OUT:
toggle = usb_gettoggle(urb->dev, ep->epnum, 1);
dir = PTD_DIR_OUT;
break;
case USB_PID_SETUP:
len = sizeof(struct usb_ctrlrequest);
ep->data = urb->setup_packet;
break;
case USB_PID_ACK:
toggle = 1;
len = 0;
dir = (urb->transfer_buffer_length
&& usb_pipein(urb->pipe))
? PTD_DIR_OUT : PTD_DIR_IN;
break;
default:
ERR("%s %d: ep->nextpid %d\n", __func__, __LINE__,
ep->nextpid);
BUG();
}
ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK | PTD_TOGGLE(toggle);
ptd->mps = PTD_MPS(ep->maxpacket)
| PTD_SPD(urb->dev->speed == USB_SPEED_LOW)
| PTD_EP(ep->epnum);
ptd->len = PTD_LEN(len) | PTD_DIR(dir);
ptd->faddr = PTD_FA(usb_pipedevice(urb->pipe));
if (!ep->active) {
ptd->mps |= PTD_LAST_MSK;
isp116x->atl_last_dir = dir;
}
isp116x->atl_bufshrt = sizeof(struct ptd) + isp116x->atl_buflen;
isp116x->atl_buflen = isp116x->atl_bufshrt + ALIGN(len, 4);
}
}
/*
Take done or failed requests out of schedule. Give back
processed urbs.
*/
static void finish_request(struct isp116x *isp116x, struct isp116x_ep *ep,
struct urb *urb, int status)
__releases(isp116x->lock) __acquires(isp116x->lock)
{
unsigned i;
ep->error_count = 0;
if (usb_pipecontrol(urb->pipe))
ep->nextpid = USB_PID_SETUP;
urb_dbg(urb, "Finish");
usb_hcd_unlink_urb_from_ep(isp116x_to_hcd(isp116x), urb);
spin_unlock(&isp116x->lock);
usb_hcd_giveback_urb(isp116x_to_hcd(isp116x), urb, status);
spin_lock(&isp116x->lock);
/* take idle endpoints out of the schedule */
if (!list_empty(&ep->hep->urb_list))
return;
/* async deschedule */
if (!list_empty(&ep->schedule)) {
list_del_init(&ep->schedule);
return;
}
/* periodic deschedule */
DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
struct isp116x_ep *temp;
struct isp116x_ep **prev = &isp116x->periodic[i];
while (*prev && ((temp = *prev) != ep))
prev = &temp->next;
if (*prev)
*prev = ep->next;
isp116x->load[i] -= ep->load;
}
ep->branch = PERIODIC_SIZE;
isp116x_to_hcd(isp116x)->self.bandwidth_allocated -=
ep->load / ep->period;
/* switch irq type? */
if (!--isp116x->periodic_count) {
isp116x->irqenb &= ~HCuPINT_SOF;
isp116x->irqenb |= HCuPINT_ATL;
}
}
/*
Analyze transfer results, handle partial transfers and errors
*/
static void postproc_atl_queue(struct isp116x *isp116x)
{
struct isp116x_ep *ep;
struct urb *urb;
struct usb_device *udev;
struct ptd *ptd;
int short_not_ok;
int status;
u8 cc;
for (ep = isp116x->atl_active; ep; ep = ep->active) {
BUG_ON(list_empty(&ep->hep->urb_list));
urb =
container_of(ep->hep->urb_list.next, struct urb, urb_list);
udev = urb->dev;
ptd = &ep->ptd;
cc = PTD_GET_CC(ptd);
short_not_ok = 1;
status = -EINPROGRESS;
/* Data underrun is special. For allowed underrun
we clear the error and continue as normal. For
forbidden underrun we finish the DATA stage
immediately while for control transfer,
we do a STATUS stage. */
if (cc == TD_DATAUNDERRUN) {
if (!(urb->transfer_flags & URB_SHORT_NOT_OK) ||
usb_pipecontrol(urb->pipe)) {
DBG("Allowed or control data underrun\n");
cc = TD_CC_NOERROR;
short_not_ok = 0;
} else {
ep->error_count = 1;
usb_settoggle(udev, ep->epnum,
ep->nextpid == USB_PID_OUT,
PTD_GET_TOGGLE(ptd));
urb->actual_length += PTD_GET_COUNT(ptd);
status = cc_to_error[TD_DATAUNDERRUN];
goto done;
}
}
if (cc != TD_CC_NOERROR && cc != TD_NOTACCESSED
&& (++ep->error_count >= 3 || cc == TD_CC_STALL
|| cc == TD_DATAOVERRUN)) {
status = cc_to_error[cc];
if (ep->nextpid == USB_PID_ACK)
ep->nextpid = 0;
goto done;
}
/* According to usb spec, zero-length Int transfer signals
finishing of the urb. Hey, does this apply only
for IN endpoints? */
if (usb_pipeint(urb->pipe) && !PTD_GET_LEN(ptd)) {
status = 0;
goto done;
}
/* Relax after previously failed, but later succeeded
or correctly NAK'ed retransmission attempt */
if (ep->error_count
&& (cc == TD_CC_NOERROR || cc == TD_NOTACCESSED))
ep->error_count = 0;
/* Take into account idiosyncracies of the isp116x chip
regarding toggle bit for failed transfers */
if (ep->nextpid == USB_PID_OUT)
usb_settoggle(udev, ep->epnum, 1, PTD_GET_TOGGLE(ptd)
^ (ep->error_count > 0));
else if (ep->nextpid == USB_PID_IN)
usb_settoggle(udev, ep->epnum, 0, PTD_GET_TOGGLE(ptd)
^ (ep->error_count > 0));
switch (ep->nextpid) {
case USB_PID_IN:
case USB_PID_OUT:
urb->actual_length += PTD_GET_COUNT(ptd);
if (PTD_GET_ACTIVE(ptd)
|| (cc != TD_CC_NOERROR && cc < 0x0E))
break;
if (urb->transfer_buffer_length != urb->actual_length) {
if (short_not_ok)
break;
} else {
if (urb->transfer_flags & URB_ZERO_PACKET
&& ep->nextpid == USB_PID_OUT
&& !(PTD_GET_COUNT(ptd) % ep->maxpacket)) {
DBG("Zero packet requested\n");
break;
}
}
/* All data for this URB is transferred, let's finish */
if (usb_pipecontrol(urb->pipe))
ep->nextpid = USB_PID_ACK;
else
status = 0;
break;
case USB_PID_SETUP:
if (PTD_GET_ACTIVE(ptd)
|| (cc != TD_CC_NOERROR && cc < 0x0E))
break;
if (urb->transfer_buffer_length == urb->actual_length)
ep->nextpid = USB_PID_ACK;
else if (usb_pipeout(urb->pipe)) {
usb_settoggle(udev, 0, 1, 1);
ep->nextpid = USB_PID_OUT;
} else {
usb_settoggle(udev, 0, 0, 1);
ep->nextpid = USB_PID_IN;
}
break;
case USB_PID_ACK:
if (PTD_GET_ACTIVE(ptd)
|| (cc != TD_CC_NOERROR && cc < 0x0E))
break;
status = 0;
ep->nextpid = 0;
break;
default:
BUG();
}
done:
if (status != -EINPROGRESS || urb->unlinked)
finish_request(isp116x, ep, urb, status);
}
}
/*
Scan transfer lists, schedule transfers, send data off
to chip.
*/
static void start_atl_transfers(struct isp116x *isp116x)
{
struct isp116x_ep *last_ep = NULL, *ep;
struct urb *urb;
u16 load = 0;
int len, index, speed, byte_time;
if (atomic_read(&isp116x->atl_finishing))
return;
if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state))
return;
/* FIFO not empty? */
if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL)
return;
isp116x->atl_active = NULL;
isp116x->atl_buflen = isp116x->atl_bufshrt = 0;
/* Schedule int transfers */
if (isp116x->periodic_count) {
isp116x->fmindex = index =
(isp116x->fmindex + 1) & (PERIODIC_SIZE - 1);
if ((load = isp116x->load[index])) {
/* Bring all int transfers for this frame
into the active queue */
isp116x->atl_active = last_ep =
isp116x->periodic[index];
while (last_ep->next)
last_ep = (last_ep->active = last_ep->next);
last_ep->active = NULL;
}
}
/* Schedule control/bulk transfers */
list_for_each_entry(ep, &isp116x->async, schedule) {
urb = container_of(ep->hep->urb_list.next,
struct urb, urb_list);
speed = urb->dev->speed;
byte_time = speed == USB_SPEED_LOW
? BYTE_TIME_LOWSPEED : BYTE_TIME_FULLSPEED;
if (ep->nextpid == USB_PID_SETUP) {
len = sizeof(struct usb_ctrlrequest);
} else if (ep->nextpid == USB_PID_ACK) {
len = 0;
} else {
/* Find current free length ... */
len = (MAX_LOAD_LIMIT - load) / byte_time;
/* ... then limit it to configured max size ... */
len = min(len, speed == USB_SPEED_LOW ?
MAX_TRANSFER_SIZE_LOWSPEED :
MAX_TRANSFER_SIZE_FULLSPEED);
/* ... and finally cut to the multiple of MaxPacketSize,
or to the real length if there's enough room. */
if (len <
(urb->transfer_buffer_length -
urb->actual_length)) {
len -= len % ep->maxpacket;
if (!len)
continue;
} else
len = urb->transfer_buffer_length -
urb->actual_length;
BUG_ON(len < 0);
}
load += len * byte_time;
if (load > MAX_LOAD_LIMIT)
break;
ep->active = NULL;
ep->length = len;
if (last_ep)
last_ep->active = ep;
else
isp116x->atl_active = ep;
last_ep = ep;
}
/* Avoid starving of endpoints */
if ((&isp116x->async)->next != (&isp116x->async)->prev)
list_move(&isp116x->async, (&isp116x->async)->next);
if (isp116x->atl_active) {
preproc_atl_queue(isp116x);
pack_fifo(isp116x);
}
}
/*
Finish the processed transfers
*/
static void finish_atl_transfers(struct isp116x *isp116x)
{
if (!isp116x->atl_active)
return;
/* Fifo not ready? */
if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE))
return;
atomic_inc(&isp116x->atl_finishing);
unpack_fifo(isp116x);
postproc_atl_queue(isp116x);
atomic_dec(&isp116x->atl_finishing);
}
static irqreturn_t isp116x_irq(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
u16 irqstat;
irqreturn_t ret = IRQ_NONE;
spin_lock(&isp116x->lock);
isp116x_write_reg16(isp116x, HCuPINTENB, 0);
irqstat = isp116x_read_reg16(isp116x, HCuPINT);
isp116x_write_reg16(isp116x, HCuPINT, irqstat);
if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
ret = IRQ_HANDLED;
finish_atl_transfers(isp116x);
}
if (irqstat & HCuPINT_OPR) {
u32 intstat = isp116x_read_reg32(isp116x, HCINTSTAT);
isp116x_write_reg32(isp116x, HCINTSTAT, intstat);
if (intstat & HCINT_UE) {
ERR("Unrecoverable error, HC is dead!\n");
/* IRQ's are off, we do no DMA,
perfectly ready to die ... */
hcd->state = HC_STATE_HALT;
ret = IRQ_HANDLED;
goto done;
}
if (intstat & HCINT_RHSC)
/* When root hub or any of its ports is going
to come out of suspend, it may take more
than 10ms for status bits to stabilize. */
mod_timer(&hcd->rh_timer, jiffies
+ msecs_to_jiffies(20) + 1);
if (intstat & HCINT_RD) {
DBG("---- remote wakeup\n");
usb_hcd_resume_root_hub(hcd);
}
irqstat &= ~HCuPINT_OPR;
ret = IRQ_HANDLED;
}
if (irqstat & (HCuPINT_ATL | HCuPINT_SOF)) {
start_atl_transfers(isp116x);
}
isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
done:
spin_unlock(&isp116x->lock);
return ret;
}
/*-----------------------------------------------------------------*/
/* usb 1.1 says max 90% of a frame is available for periodic transfers.
* this driver doesn't promise that much since it's got to handle an
* IRQ per packet; irq handling latencies also use up that time.
*/
/* out of 1000 us */
#define MAX_PERIODIC_LOAD 600
static int balance(struct isp116x *isp116x, u16 period, u16 load)
{
int i, branch = -ENOSPC;
/* search for the least loaded schedule branch of that period
which has enough bandwidth left unreserved. */
for (i = 0; i < period; i++) {
if (branch < 0 || isp116x->load[branch] > isp116x->load[i]) {
int j;
for (j = i; j < PERIODIC_SIZE; j += period) {
if ((isp116x->load[j] + load)
> MAX_PERIODIC_LOAD)
break;
}
if (j < PERIODIC_SIZE)
continue;
branch = i;
}
}
return branch;
}
/* NB! ALL the code above this point runs with isp116x->lock
held, irqs off
*/
/*-----------------------------------------------------------------*/
static int isp116x_urb_enqueue(struct usb_hcd *hcd,
struct urb *urb,
gfp_t mem_flags)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
struct usb_device *udev = urb->dev;
unsigned int pipe = urb->pipe;
int is_out = !usb_pipein(pipe);
int type = usb_pipetype(pipe);
int epnum = usb_pipeendpoint(pipe);
struct usb_host_endpoint *hep = urb->ep;
struct isp116x_ep *ep = NULL;
unsigned long flags;
int i;
int ret = 0;
urb_dbg(urb, "Enqueue");
if (type == PIPE_ISOCHRONOUS) {
ERR("Isochronous transfers not supported\n");
urb_dbg(urb, "Refused to enqueue");
return -ENXIO;
}
/* avoid all allocations within spinlocks: request or endpoint */
if (!hep->hcpriv) {
ep = kzalloc(sizeof *ep, mem_flags);
if (!ep)
return -ENOMEM;
}
spin_lock_irqsave(&isp116x->lock, flags);
if (!HC_IS_RUNNING(hcd->state)) {
kfree(ep);
ret = -ENODEV;
goto fail_not_linked;
}
ret = usb_hcd_link_urb_to_ep(hcd, urb);
if (ret) {
kfree(ep);
goto fail_not_linked;
}
if (hep->hcpriv)
ep = hep->hcpriv;
else {
INIT_LIST_HEAD(&ep->schedule);
ep->udev = udev;
ep->epnum = epnum;
ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
usb_settoggle(udev, epnum, is_out, 0);
if (type == PIPE_CONTROL) {
ep->nextpid = USB_PID_SETUP;
} else if (is_out) {
ep->nextpid = USB_PID_OUT;
} else {
ep->nextpid = USB_PID_IN;
}
if (urb->interval) {
/*
With INT URBs submitted, the driver works with SOF
interrupt enabled and ATL interrupt disabled. After
the PTDs are written to fifo ram, the chip starts
fifo processing and usb transfers after the next
SOF and continues until the transfers are finished
(succeeded or failed) or the frame ends. Therefore,
the transfers occur only in every second frame,
while fifo reading/writing and data processing
occur in every other second frame. */
if (urb->interval < 2)
urb->interval = 2;
if (urb->interval > 2 * PERIODIC_SIZE)
urb->interval = 2 * PERIODIC_SIZE;
ep->period = urb->interval >> 1;
ep->branch = PERIODIC_SIZE;
ep->load = usb_calc_bus_time(udev->speed,
!is_out,
(type == PIPE_ISOCHRONOUS),
usb_maxpacket(udev, pipe,
is_out)) /
1000;
}
hep->hcpriv = ep;
ep->hep = hep;
}
/* maybe put endpoint into schedule */
switch (type) {
case PIPE_CONTROL:
case PIPE_BULK:
if (list_empty(&ep->schedule))
list_add_tail(&ep->schedule, &isp116x->async);
break;
case PIPE_INTERRUPT:
urb->interval = ep->period;
ep->length = min((int)ep->maxpacket,
urb->transfer_buffer_length);
/* urb submitted for already existing endpoint */
if (ep->branch < PERIODIC_SIZE)
break;
ep->branch = ret = balance(isp116x, ep->period, ep->load);
if (ret < 0)
goto fail;
ret = 0;
urb->start_frame = (isp116x->fmindex & (PERIODIC_SIZE - 1))
+ ep->branch;
/* sort each schedule branch by period (slow before fast)
to share the faster parts of the tree without needing
dummy/placeholder nodes */
DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
struct isp116x_ep **prev = &isp116x->periodic[i];
struct isp116x_ep *here = *prev;
while (here && ep != here) {
if (ep->period > here->period)
break;
prev = &here->next;
here = *prev;
}
if (ep != here) {
ep->next = here;
*prev = ep;
}
isp116x->load[i] += ep->load;
}
hcd->self.bandwidth_allocated += ep->load / ep->period;
/* switch over to SOFint */
if (!isp116x->periodic_count++) {
isp116x->irqenb &= ~HCuPINT_ATL;
isp116x->irqenb |= HCuPINT_SOF;
isp116x_write_reg16(isp116x, HCuPINTENB,
isp116x->irqenb);
}
}
urb->hcpriv = hep;
start_atl_transfers(isp116x);
fail:
if (ret)
usb_hcd_unlink_urb_from_ep(hcd, urb);
fail_not_linked:
spin_unlock_irqrestore(&isp116x->lock, flags);
return ret;
}
/*
Dequeue URBs.
*/
static int isp116x_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
int status)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
struct usb_host_endpoint *hep;
struct isp116x_ep *ep, *ep_act;
unsigned long flags;
int rc;
spin_lock_irqsave(&isp116x->lock, flags);
rc = usb_hcd_check_unlink_urb(hcd, urb, status);
if (rc)
goto done;
hep = urb->hcpriv;
ep = hep->hcpriv;
WARN_ON(hep != ep->hep);
/* In front of queue? */
if (ep->hep->urb_list.next == &urb->urb_list)
/* active? */
for (ep_act = isp116x->atl_active; ep_act;
ep_act = ep_act->active)
if (ep_act == ep) {
VDBG("dequeue, urb %p active; wait for irq\n",
urb);
urb = NULL;
break;
}
if (urb)
finish_request(isp116x, ep, urb, status);
done:
spin_unlock_irqrestore(&isp116x->lock, flags);
return rc;
}
static void isp116x_endpoint_disable(struct usb_hcd *hcd,
struct usb_host_endpoint *hep)
{
int i;
struct isp116x_ep *ep = hep->hcpriv;
if (!ep)
return;
/* assume we'd just wait for the irq */
for (i = 0; i < 100 && !list_empty(&hep->urb_list); i++)
msleep(3);
if (!list_empty(&hep->urb_list))
WARNING("ep %p not empty?\n", ep);
kfree(ep);
hep->hcpriv = NULL;
}
static int isp116x_get_frame(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
u32 fmnum;
unsigned long flags;
spin_lock_irqsave(&isp116x->lock, flags);
fmnum = isp116x_read_reg32(isp116x, HCFMNUM);
spin_unlock_irqrestore(&isp116x->lock, flags);
return (int)fmnum;
}
/*
Adapted from ohci-hub.c. Currently we don't support autosuspend.
*/
static int isp116x_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
int ports, i, changed = 0;
unsigned long flags;
if (!HC_IS_RUNNING(hcd->state))
return -ESHUTDOWN;
/* Report no status change now, if we are scheduled to be
called later */
if (timer_pending(&hcd->rh_timer))
return 0;
ports = isp116x->rhdesca & RH_A_NDP;
spin_lock_irqsave(&isp116x->lock, flags);
isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
if (isp116x->rhstatus & (RH_HS_LPSC | RH_HS_OCIC))
buf[0] = changed = 1;
else
buf[0] = 0;
for (i = 0; i < ports; i++) {
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
u32 status = isp116x_read_reg32(isp116x, i ? HCRHPORT2 : HCRHPORT1);
if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC
| RH_PS_OCIC | RH_PS_PRSC)) {
changed = 1;
buf[0] |= 1 << (i + 1);
}
}
spin_unlock_irqrestore(&isp116x->lock, flags);
return changed;
}
static void isp116x_hub_descriptor(struct isp116x *isp116x,
struct usb_hub_descriptor *desc)
{
u32 reg = isp116x->rhdesca;
desc->bDescriptorType = 0x29;
desc->bDescLength = 9;
desc->bHubContrCurrent = 0;
desc->bNbrPorts = (u8) (reg & 0x3);
/* Power switching, device type, overcurrent. */
desc->wHubCharacteristics = cpu_to_le16((u16) ((reg >> 8) & 0x1f));
desc->bPwrOn2PwrGood = (u8) ((reg >> 24) & 0xff);
/* two bitmaps: ports removable, and legacy PortPwrCtrlMask */
desc->bitmap[0] = 0;
desc->bitmap[1] = ~0;
}
/* Perform reset of a given port.
It would be great to just start the reset and let the
USB core to clear the reset in due time. However,
root hub ports should be reset for at least 50 ms, while
our chip stays in reset for about 10 ms. I.e., we must
repeatedly reset it ourself here.
*/
static inline void root_port_reset(struct isp116x *isp116x, unsigned port)
{
u32 tmp;
unsigned long flags, t;
/* Root hub reset should be 50 ms, but some devices
want it even longer. */
t = jiffies + msecs_to_jiffies(100);
while (time_before(jiffies, t)) {
spin_lock_irqsave(&isp116x->lock, flags);
/* spin until any current reset finishes */
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
for (;;) {
tmp = isp116x_read_reg32(isp116x, port ?
HCRHPORT2 : HCRHPORT1);
if (!(tmp & RH_PS_PRS))
break;
udelay(500);
}
/* Don't reset a disconnected port */
if (!(tmp & RH_PS_CCS)) {
spin_unlock_irqrestore(&isp116x->lock, flags);
break;
}
/* Reset lasts 10ms (claims datasheet) */
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
isp116x_write_reg32(isp116x, port ? HCRHPORT2 :
HCRHPORT1, (RH_PS_PRS));
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
spin_unlock_irqrestore(&isp116x->lock, flags);
msleep(10);
}
}
/* Adapted from ohci-hub.c */
static int isp116x_hub_control(struct usb_hcd *hcd,
u16 typeReq,
u16 wValue, u16 wIndex, char *buf, u16 wLength)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
int ret = 0;
unsigned long flags;
int ports = isp116x->rhdesca & RH_A_NDP;
u32 tmp = 0;
switch (typeReq) {
case ClearHubFeature:
DBG("ClearHubFeature: ");
switch (wValue) {
case C_HUB_OVER_CURRENT:
DBG("C_HUB_OVER_CURRENT\n");
spin_lock_irqsave(&isp116x->lock, flags);
isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC);
spin_unlock_irqrestore(&isp116x->lock, flags);
case C_HUB_LOCAL_POWER:
DBG("C_HUB_LOCAL_POWER\n");
break;
default:
goto error;
}
break;
case SetHubFeature:
DBG("SetHubFeature: ");
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
DBG("C_HUB_OVER_CURRENT or C_HUB_LOCAL_POWER\n");
break;
default:
goto error;
}
break;
case GetHubDescriptor:
DBG("GetHubDescriptor\n");
isp116x_hub_descriptor(isp116x,
(struct usb_hub_descriptor *)buf);
break;
case GetHubStatus:
DBG("GetHubStatus\n");
*(__le32 *) buf = 0;
break;
case GetPortStatus:
DBG("GetPortStatus\n");
if (!wIndex || wIndex > ports)
goto error;
spin_lock_irqsave(&isp116x->lock, flags);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
tmp = isp116x_read_reg32(isp116x, (--wIndex) ? HCRHPORT2 : HCRHPORT1);
spin_unlock_irqrestore(&isp116x->lock, flags);
*(__le32 *) buf = cpu_to_le32(tmp);
DBG("GetPortStatus: port[%d] %08x\n", wIndex + 1, tmp);
break;
case ClearPortFeature:
DBG("ClearPortFeature: ");
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
DBG("USB_PORT_FEAT_ENABLE\n");
tmp = RH_PS_CCS;
break;
case USB_PORT_FEAT_C_ENABLE:
DBG("USB_PORT_FEAT_C_ENABLE\n");
tmp = RH_PS_PESC;
break;
case USB_PORT_FEAT_SUSPEND:
DBG("USB_PORT_FEAT_SUSPEND\n");
tmp = RH_PS_POCI;
break;
case USB_PORT_FEAT_C_SUSPEND:
DBG("USB_PORT_FEAT_C_SUSPEND\n");
tmp = RH_PS_PSSC;
break;
case USB_PORT_FEAT_POWER:
DBG("USB_PORT_FEAT_POWER\n");
tmp = RH_PS_LSDA;
break;
case USB_PORT_FEAT_C_CONNECTION:
DBG("USB_PORT_FEAT_C_CONNECTION\n");
tmp = RH_PS_CSC;
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
DBG("USB_PORT_FEAT_C_OVER_CURRENT\n");
tmp = RH_PS_OCIC;
break;
case USB_PORT_FEAT_C_RESET:
DBG("USB_PORT_FEAT_C_RESET\n");
tmp = RH_PS_PRSC;
break;
default:
goto error;
}
spin_lock_irqsave(&isp116x->lock, flags);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
isp116x_write_reg32(isp116x, wIndex
? HCRHPORT2 : HCRHPORT1, tmp);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
spin_unlock_irqrestore(&isp116x->lock, flags);
break;
case SetPortFeature:
DBG("SetPortFeature: ");
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
DBG("USB_PORT_FEAT_SUSPEND\n");
spin_lock_irqsave(&isp116x->lock, flags);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
isp116x_write_reg32(isp116x, wIndex
? HCRHPORT2 : HCRHPORT1, RH_PS_PSS);
spin_unlock_irqrestore(&isp116x->lock, flags);
break;
case USB_PORT_FEAT_POWER:
DBG("USB_PORT_FEAT_POWER\n");
spin_lock_irqsave(&isp116x->lock, flags);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
isp116x_write_reg32(isp116x, wIndex
? HCRHPORT2 : HCRHPORT1, RH_PS_PPS);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
spin_unlock_irqrestore(&isp116x->lock, flags);
break;
case USB_PORT_FEAT_RESET:
DBG("USB_PORT_FEAT_RESET\n");
root_port_reset(isp116x, wIndex);
break;
default:
goto error;
}
break;
default:
error:
/* "protocol stall" on error */
DBG("PROTOCOL STALL\n");
ret = -EPIPE;
}
return ret;
}
/*-----------------------------------------------------------------*/
#ifdef CONFIG_DEBUG_FS
static void dump_irq(struct seq_file *s, char *label, u16 mask)
{
seq_printf(s, "%s %04x%s%s%s%s%s%s\n", label, mask,
mask & HCuPINT_CLKRDY ? " clkrdy" : "",
mask & HCuPINT_SUSP ? " susp" : "",
mask & HCuPINT_OPR ? " opr" : "",
mask & HCuPINT_AIIEOT ? " eot" : "",
mask & HCuPINT_ATL ? " atl" : "",
mask & HCuPINT_SOF ? " sof" : "");
}
static void dump_int(struct seq_file *s, char *label, u32 mask)
{
seq_printf(s, "%s %08x%s%s%s%s%s%s%s\n", label, mask,
mask & HCINT_MIE ? " MIE" : "",
mask & HCINT_RHSC ? " rhsc" : "",
mask & HCINT_FNO ? " fno" : "",
mask & HCINT_UE ? " ue" : "",
mask & HCINT_RD ? " rd" : "",
mask & HCINT_SF ? " sof" : "", mask & HCINT_SO ? " so" : "");
}
static int isp116x_show_dbg(struct seq_file *s, void *unused)
{
struct isp116x *isp116x = s->private;
seq_printf(s, "%s\n%s version %s\n",
isp116x_to_hcd(isp116x)->product_desc, hcd_name,
DRIVER_VERSION);
if (HC_IS_SUSPENDED(isp116x_to_hcd(isp116x)->state)) {
seq_printf(s, "HCD is suspended\n");
return 0;
}
if (!HC_IS_RUNNING(isp116x_to_hcd(isp116x)->state)) {
seq_printf(s, "HCD not running\n");
return 0;
}
spin_lock_irq(&isp116x->lock);
dump_irq(s, "hc_irq_enable", isp116x_read_reg16(isp116x, HCuPINTENB));
dump_irq(s, "hc_irq_status", isp116x_read_reg16(isp116x, HCuPINT));
dump_int(s, "hc_int_enable", isp116x_read_reg32(isp116x, HCINTENB));
dump_int(s, "hc_int_status", isp116x_read_reg32(isp116x, HCINTSTAT));
isp116x_show_regs_seq(isp116x, s);
spin_unlock_irq(&isp116x->lock);
seq_printf(s, "\n");
return 0;
}
static int isp116x_open_seq(struct inode *inode, struct file *file)
{
return single_open(file, isp116x_show_dbg, inode->i_private);
}
static const struct file_operations isp116x_debug_fops = {
.open = isp116x_open_seq,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int create_debug_file(struct isp116x *isp116x)
{
isp116x->dentry = debugfs_create_file(hcd_name,
S_IRUGO, NULL, isp116x,
&isp116x_debug_fops);
if (!isp116x->dentry)
return -ENOMEM;
return 0;
}
static void remove_debug_file(struct isp116x *isp116x)
{
debugfs_remove(isp116x->dentry);
}
#else
#define create_debug_file(d) 0
#define remove_debug_file(d) do{}while(0)
#endif /* CONFIG_DEBUG_FS */
/*-----------------------------------------------------------------*/
/*
Software reset - can be called from any contect.
*/
static int isp116x_sw_reset(struct isp116x *isp116x)
{
int retries = 15;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&isp116x->lock, flags);
isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC);
isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR);
while (--retries) {
/* It usually resets within 1 ms */
mdelay(1);
if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR))
break;
}
if (!retries) {
ERR("Software reset timeout\n");
ret = -ETIME;
}
spin_unlock_irqrestore(&isp116x->lock, flags);
return ret;
}
static int isp116x_reset(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
unsigned long t;
u16 clkrdy = 0;
int ret, timeout = 15 /* ms */ ;
ret = isp116x_sw_reset(isp116x);
if (ret)
return ret;
t = jiffies + msecs_to_jiffies(timeout);
while (time_before_eq(jiffies, t)) {
msleep(4);
spin_lock_irq(&isp116x->lock);
clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY;
spin_unlock_irq(&isp116x->lock);
if (clkrdy)
break;
}
if (!clkrdy) {
ERR("Clock not ready after %dms\n", timeout);
/* After sw_reset the clock won't report to be ready, if
H_WAKEUP pin is high. */
ERR("Please make sure that the H_WAKEUP pin is pulled low!\n");
ret = -ENODEV;
}
return ret;
}
static void isp116x_stop(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
unsigned long flags;
u32 val;
spin_lock_irqsave(&isp116x->lock, flags);
isp116x_write_reg16(isp116x, HCuPINTENB, 0);
/* Switch off ports' power, some devices don't come up
after next 'insmod' without this */
val = isp116x_read_reg32(isp116x, HCRHDESCA);
val &= ~(RH_A_NPS | RH_A_PSM);
isp116x_write_reg32(isp116x, HCRHDESCA, val);
isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
spin_unlock_irqrestore(&isp116x->lock, flags);
isp116x_sw_reset(isp116x);
}
/*
Configure the chip. The chip must be successfully reset by now.
*/
static int isp116x_start(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
struct isp116x_platform_data *board = isp116x->board;
u32 val;
unsigned long flags;
spin_lock_irqsave(&isp116x->lock, flags);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
/* clear interrupt status and disable all interrupt sources */
isp116x_write_reg16(isp116x, HCuPINT, 0xff);
isp116x_write_reg16(isp116x, HCuPINTENB, 0);
val = isp116x_read_reg16(isp116x, HCCHIPID);
if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
ERR("Invalid chip ID %04x\n", val);
spin_unlock_irqrestore(&isp116x->lock, flags);
return -ENODEV;
}
/* To be removed in future */
hcd->uses_new_polling = 1;
isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE);
isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE);
/* ----- HW conf */
val = HCHWCFG_INT_ENABLE | HCHWCFG_DBWIDTH(1);
if (board->sel15Kres)
val |= HCHWCFG_15KRSEL;
/* Remote wakeup won't work without working clock */
if (board->remote_wakeup_enable)
val |= HCHWCFG_CLKNOTSTOP;
if (board->oc_enable)
val |= HCHWCFG_ANALOG_OC;
if (board->int_act_high)
val |= HCHWCFG_INT_POL;
if (board->int_edge_triggered)
val |= HCHWCFG_INT_TRIGGER;
isp116x_write_reg16(isp116x, HCHWCFG, val);
/* ----- Root hub conf */
val = (25 << 24) & RH_A_POTPGT;
/* AN10003_1.pdf recommends RH_A_NPS (no power switching) to
be always set. Yet, instead, we request individual port
power switching. */
val |= RH_A_PSM;
/* Report overcurrent per port */
val |= RH_A_OCPM;
isp116x_write_reg32(isp116x, HCRHDESCA, val);
//while(1) //HJB
{
isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA);
// isp116x_delay(isp116x, 1000);
}
val = RH_B_PPCM;
isp116x_write_reg32(isp116x, HCRHDESCB, val);
isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB);
val = 0;
if (board->remote_wakeup_enable) {
if (!device_can_wakeup(hcd->self.controller))
device_init_wakeup(hcd->self.controller, 1);
val |= RH_HS_DRWE;
}
isp116x_write_reg32(isp116x, HCRHSTATUS, val);
isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf);
hcd->state = HC_STATE_RUNNING;
/* Set up interrupts */
isp116x->intenb = HCINT_MIE | HCINT_RHSC | HCINT_UE;
if (board->remote_wakeup_enable)
isp116x->intenb |= HCINT_RD;
isp116x->irqenb = HCuPINT_ATL | HCuPINT_OPR; /* | HCuPINT_SUSP; */
isp116x_write_reg32(isp116x, HCINTENB, isp116x->intenb);
isp116x_write_reg16(isp116x, HCuPINTENB, isp116x->irqenb);
/* Go operational */
val = HCCONTROL_USB_OPER;
if (board->remote_wakeup_enable)
val |= HCCONTROL_RWE;
isp116x_write_reg32(isp116x, HCCONTROL, val);
/* Disable ports to avoid race in device enumeration */
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS);
isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
isp116x_show_regs_log(isp116x);
spin_unlock_irqrestore(&isp116x->lock, flags);
return 0;
}
#ifdef CONFIG_PM
static int isp116x_bus_suspend(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
unsigned long flags;
u32 val;
int ret = 0;
spin_lock_irqsave(&isp116x->lock, flags);
val = isp116x_read_reg32(isp116x, HCCONTROL);
switch (val & HCCONTROL_HCFS) {
case HCCONTROL_USB_OPER:
spin_unlock_irqrestore(&isp116x->lock, flags);
val &= (~HCCONTROL_HCFS & ~HCCONTROL_RWE);
val |= HCCONTROL_USB_SUSPEND;
if (hcd->self.root_hub->do_remote_wakeup)
val |= HCCONTROL_RWE;
/* Wait for usb transfers to finish */
msleep(2);
spin_lock_irqsave(&isp116x->lock, flags);
isp116x_write_reg32(isp116x, HCCONTROL, val);
spin_unlock_irqrestore(&isp116x->lock, flags);
/* Wait for devices to suspend */
msleep(5);
break;
case HCCONTROL_USB_RESUME:
isp116x_write_reg32(isp116x, HCCONTROL,
(val & ~HCCONTROL_HCFS) |
HCCONTROL_USB_RESET);
case HCCONTROL_USB_RESET:
ret = -EBUSY;
default: /* HCCONTROL_USB_SUSPEND */
spin_unlock_irqrestore(&isp116x->lock, flags);
break;
}
return ret;
}
static int isp116x_bus_resume(struct usb_hcd *hcd)
{
struct isp116x *isp116x = hcd_to_isp116x(hcd);
u32 val;
msleep(5);
spin_lock_irq(&isp116x->lock);
val = isp116x_read_reg32(isp116x, HCCONTROL);
switch (val & HCCONTROL_HCFS) {
case HCCONTROL_USB_SUSPEND:
val &= ~HCCONTROL_HCFS;
val |= HCCONTROL_USB_RESUME;
isp116x_write_reg32(isp116x, HCCONTROL, val);
case HCCONTROL_USB_RESUME:
break;
case HCCONTROL_USB_OPER:
spin_unlock_irq(&isp116x->lock);
return 0;
default:
/* HCCONTROL_USB_RESET: this may happen, when during
suspension the HC lost power. Reinitialize completely */
spin_unlock_irq(&isp116x->lock);
DBG("Chip has been reset while suspended. Reinit from scratch.\n");
isp116x_reset(hcd);
isp116x_start(hcd);
isp116x_hub_control(hcd, SetPortFeature,
USB_PORT_FEAT_POWER, 1, NULL, 0);
if ((isp116x->rhdesca & RH_A_NDP) == 2)
isp116x_hub_control(hcd, SetPortFeature,
USB_PORT_FEAT_POWER, 2, NULL, 0);
return 0;
}
val = isp116x->rhdesca & RH_A_NDP;
while (val--) {
u32 stat =
isp116x_read_reg32(isp116x, val ? HCRHPORT2 : HCRHPORT1);
/* force global, not selective, resume */
if (!(stat & RH_PS_PSS))
continue;
DBG("%s: Resuming port %d\n", __func__, val);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
isp116x_write_reg32(isp116x, RH_PS_POCI, val
? HCRHPORT2 : HCRHPORT1);
printk("HJB %s:%d\n", __FILE__, __LINE__ );
isp116x_show_reg_log(isp116x, HCRHPORT1, NULL);
isp116x_show_reg_log(isp116x, HCRHPORT2, NULL);
}
spin_unlock_irq(&isp116x->lock);
hcd->state = HC_STATE_RESUMING;
msleep(20);
/* Go operational */
spin_lock_irq(&isp116x->lock);
val = isp116x_read_reg32(isp116x, HCCONTROL);
isp116x_write_reg32(isp116x, HCCONTROL,
(val & ~HCCONTROL_HCFS) | HCCONTROL_USB_OPER);
spin_unlock_irq(&isp116x->lock);
hcd->state = HC_STATE_RUNNING;
return 0;
}
#else
#define isp116x_bus_suspend NULL
#define isp116x_bus_resume NULL
#endif
static struct hc_driver isp116x_hc_driver = {
.description = hcd_name,
.product_desc = "ISP116x Host Controller",
.hcd_priv_size = sizeof(struct isp116x),
.irq = isp116x_irq,
.flags = HCD_USB11,
.reset = isp116x_reset,
.start = isp116x_start,
.stop = isp116x_stop,
.urb_enqueue = isp116x_urb_enqueue,
.urb_dequeue = isp116x_urb_dequeue,
.endpoint_disable = isp116x_endpoint_disable,
.get_frame_number = isp116x_get_frame,
.hub_status_data = isp116x_hub_status_data,
.hub_control = isp116x_hub_control,
.bus_suspend = isp116x_bus_suspend,
.bus_resume = isp116x_bus_resume,
};
/*----------------------------------------------------------------*/
static int isp116x_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct isp116x *isp116x;
struct resource *res;
if (!hcd)
return 0;
isp116x = hcd_to_isp116x(hcd);
remove_debug_file(isp116x);
usb_remove_hcd(hcd);
iounmap(isp116x->data_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
release_mem_region(res->start, 2);
iounmap(isp116x->addr_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, 2);
usb_put_hcd(hcd);
return 0;
}
#define resource_len(r) (((r)->end - (r)->start) + 1)
static int __devinit isp116x_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct isp116x *isp116x;
struct resource *addr, *data, *ires;
void __iomem *addr_reg;
void __iomem *data_reg;
int irq;
int ret = 0;
unsigned long irqflags;
if (pdev->num_resources < 3) {
ret = -ENODEV;
goto err1;
}
data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!addr || !data || !ires) {
ret = -ENODEV;
goto err1;
}
irq = ires->start;
irqflags = ires->flags & IRQF_TRIGGER_MASK;
if (pdev->dev.dma_mask) {
DBG("DMA not supported\n");
ret = -EINVAL;
goto err1;
}
if (!request_mem_region(addr->start, 2, hcd_name)) {
ret = -EBUSY;
goto err1;
}
addr_reg = ioremap(addr->start, resource_len(addr));
if (addr_reg == NULL) {
ret = -ENOMEM;
goto err2;
}
if (!request_mem_region(data->start, 2, hcd_name)) {
ret = -EBUSY;
goto err3;
}
data_reg = ioremap(data->start, resource_len(data));
if (data_reg == NULL) {
ret = -ENOMEM;
goto err4;
}
/* allocate and initialize hcd */
hcd = usb_create_hcd(&isp116x_hc_driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
ret = -ENOMEM;
goto err5;
}
/* this rsrc_start is bogus */
hcd->rsrc_start = addr->start;
isp116x = hcd_to_isp116x(hcd);
isp116x->data_reg = data_reg;
isp116x->addr_reg = addr_reg;
spin_lock_init(&isp116x->lock);
INIT_LIST_HEAD(&isp116x->async);
isp116x->board = pdev->dev.platform_data;
if (!isp116x->board) {
ERR("Platform data structure not initialized\n");
ret = -ENODEV;
goto err6;
}
if (isp116x_check_platform_delay(isp116x)) {
ERR("USE_PLATFORM_DELAY defined, but delay function not "
"implemented.\n");
ERR("See comments in drivers/usb/host/isp116x-hcd.c\n");
ret = -ENODEV;
goto err6;
}
ret = usb_add_hcd(hcd, irq, irqflags | IRQF_DISABLED);
if (ret)
goto err6;
ret = create_debug_file(isp116x);
if (ret) {
ERR("Couldn't create debugfs entry\n");
goto err7;
}
return 0;
err7:
usb_remove_hcd(hcd);
err6:
usb_put_hcd(hcd);
err5:
iounmap(data_reg);
err4:
release_mem_region(data->start, 2);
err3:
iounmap(addr_reg);
err2:
release_mem_region(addr->start, 2);
err1:
ERR("init error, %d\n", ret);
return ret;
}
#ifdef CONFIG_PM
/*
Suspend of platform device
*/
static int isp116x_suspend(struct platform_device *dev, pm_message_t state)
{
printk("HJB %s:%d\n", __FILE__, __LINE__ );
VDBG("%s: state %x\n", __func__, state.event);
return 0;
}
/*
Resume platform device
*/
static int isp116x_resume(struct platform_device *dev)
{
printk("HJB %s:%d\n", __FILE__, __LINE__ );
VDBG("%s\n", __func__);
return 0;
}
#else
#define isp116x_suspend NULL
#define isp116x_resume NULL
#endif
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:isp116x-hcd");
static struct platform_driver isp116x_driver = {
.probe = isp116x_probe,
.remove = isp116x_remove,
.suspend = isp116x_suspend,
.resume = isp116x_resume,
.driver = {
.name = (char *)hcd_name,
.owner = THIS_MODULE,
},
};
/*-----------------------------------------------------------------*/
static int __init isp116x_init(void)
{
if (usb_disabled())
return -ENODEV;
INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
return platform_driver_register(&isp116x_driver);
}
module_init(isp116x_init);
static void __exit isp116x_cleanup(void)
{
platform_driver_unregister(&isp116x_driver);
}
module_exit(isp116x_cleanup);
If you could at least give me an indication of where to begin my search
for a solution I'd be very happy.
Regards
Henk Boshoff.
--
Henk Boshoff (Founder)
S-Curve Technologies cc.
henk@xxxxxxxxxxxxx
http://www.s-curve.co.za
Telephone number
South-Africa: +27823748161
Skype: henkbsct
Linkedin: http://www.linkedin.com/in/henkboshoff
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