linux/drivers/usb/atm/speedtch.c

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/******************************************************************************
* speedtch.c - Alcatel SpeedTouch USB xDSL modem driver
*
* Copyright (C) 2001, Alcatel
* Copyright (C) 2003, Duncan Sands
* Copyright (C) 2004, David Woodhouse
*
* Based on "modem_run.c", copyright (C) 2001, Benoit Papillault
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <asm/page.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/firmware.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/usb/ch9.h>
#include <linux/workqueue.h>
#include "usbatm.h"
#define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
#define DRIVER_VERSION "1.10"
#define DRIVER_DESC "Alcatel SpeedTouch USB driver version " DRIVER_VERSION
static const char speedtch_driver_name[] = "speedtch";
#define CTRL_TIMEOUT 2000 /* milliseconds */
#define DATA_TIMEOUT 2000 /* milliseconds */
#define OFFSET_7 0 /* size 1 */
#define OFFSET_b 1 /* size 8 */
#define OFFSET_d 9 /* size 4 */
#define OFFSET_e 13 /* size 1 */
#define OFFSET_f 14 /* size 1 */
#define SIZE_7 1
#define SIZE_b 8
#define SIZE_d 4
#define SIZE_e 1
#define SIZE_f 1
#define MIN_POLL_DELAY 5000 /* milliseconds */
#define MAX_POLL_DELAY 60000 /* milliseconds */
#define RESUBMIT_DELAY 1000 /* milliseconds */
#define DEFAULT_BULK_ALTSETTING 1
#define DEFAULT_ISOC_ALTSETTING 3
#define DEFAULT_DL_512_FIRST 0
#define DEFAULT_ENABLE_ISOC 0
#define DEFAULT_SW_BUFFERING 0
static unsigned int altsetting = 0; /* zero means: use the default */
static bool dl_512_first = DEFAULT_DL_512_FIRST;
static bool enable_isoc = DEFAULT_ENABLE_ISOC;
static bool sw_buffering = DEFAULT_SW_BUFFERING;
#define DEFAULT_B_MAX_DSL 8128
#define DEFAULT_MODEM_MODE 11
#define MODEM_OPTION_LENGTH 16
static const unsigned char DEFAULT_MODEM_OPTION[MODEM_OPTION_LENGTH] = {
0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static unsigned int BMaxDSL = DEFAULT_B_MAX_DSL;
static unsigned char ModemMode = DEFAULT_MODEM_MODE;
static unsigned char ModemOption[MODEM_OPTION_LENGTH];
static unsigned int num_ModemOption;
module_param(altsetting, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(altsetting,
"Alternative setting for data interface (bulk_default: "
__MODULE_STRING(DEFAULT_BULK_ALTSETTING) "; isoc_default: "
__MODULE_STRING(DEFAULT_ISOC_ALTSETTING) ")");
module_param(dl_512_first, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dl_512_first,
"Read 512 bytes before sending firmware (default: "
__MODULE_STRING(DEFAULT_DL_512_FIRST) ")");
module_param(enable_isoc, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(enable_isoc,
"Use isochronous transfers if available (default: "
__MODULE_STRING(DEFAULT_ENABLE_ISOC) ")");
module_param(sw_buffering, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(sw_buffering,
"Enable software buffering (default: "
__MODULE_STRING(DEFAULT_SW_BUFFERING) ")");
module_param(BMaxDSL, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(BMaxDSL,
"default: " __MODULE_STRING(DEFAULT_B_MAX_DSL));
module_param(ModemMode, byte, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ModemMode,
"default: " __MODULE_STRING(DEFAULT_MODEM_MODE));
module_param_array(ModemOption, byte, &num_ModemOption, S_IRUGO);
MODULE_PARM_DESC(ModemOption, "default: 0x10,0x00,0x00,0x00,0x20");
#define INTERFACE_DATA 1
#define ENDPOINT_INT 0x81
#define ENDPOINT_BULK_DATA 0x07
#define ENDPOINT_ISOC_DATA 0x07
#define ENDPOINT_FIRMWARE 0x05
struct speedtch_params {
unsigned int altsetting;
unsigned int BMaxDSL;
unsigned char ModemMode;
unsigned char ModemOption[MODEM_OPTION_LENGTH];
};
struct speedtch_instance_data {
struct usbatm_data *usbatm;
struct speedtch_params params; /* set in probe, constant afterwards */
struct timer_list status_check_timer;
struct work_struct status_check_work;
unsigned char last_status;
int poll_delay; /* milliseconds */
struct timer_list resubmit_timer;
struct urb *int_urb;
unsigned char int_data[16];
unsigned char scratch_buffer[16];
};
/***************
** firmware **
***************/
static void speedtch_set_swbuff(struct speedtch_instance_data *instance, int state)
{
struct usbatm_data *usbatm = instance->usbatm;
struct usb_device *usb_dev = usbatm->usb_dev;
int ret;
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x32, 0x40, state ? 0x01 : 0x00, 0x00, NULL, 0, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm,
"%sabling SW buffering: usb_control_msg returned %d\n",
state ? "En" : "Dis", ret);
else
usb_dbg(usbatm, "speedtch_set_swbuff: %sbled SW buffering\n", state ? "En" : "Dis");
}
static void speedtch_test_sequence(struct speedtch_instance_data *instance)
{
struct usbatm_data *usbatm = instance->usbatm;
struct usb_device *usb_dev = usbatm->usb_dev;
unsigned char *buf = instance->scratch_buffer;
int ret;
/* URB 147 */
buf[0] = 0x1c;
buf[1] = 0x50;
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x01, 0x40, 0x0b, 0x00, buf, 2, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm, "%s failed on URB147: %d\n", __func__, ret);
/* URB 148 */
buf[0] = 0x32;
buf[1] = 0x00;
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x01, 0x40, 0x02, 0x00, buf, 2, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm, "%s failed on URB148: %d\n", __func__, ret);
/* URB 149 */
buf[0] = 0x01;
buf[1] = 0x00;
buf[2] = 0x01;
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x01, 0x40, 0x03, 0x00, buf, 3, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm, "%s failed on URB149: %d\n", __func__, ret);
/* URB 150 */
buf[0] = 0x01;
buf[1] = 0x00;
buf[2] = 0x01;
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x01, 0x40, 0x04, 0x00, buf, 3, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm, "%s failed on URB150: %d\n", __func__, ret);
/* Extra initialisation in recent drivers - gives higher speeds */
/* URBext1 */
buf[0] = instance->params.ModemMode;
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x01, 0x40, 0x11, 0x00, buf, 1, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm, "%s failed on URBext1: %d\n", __func__, ret);
/* URBext2 */
/* This seems to be the one which actually triggers the higher sync
rate -- it does require the new firmware too, although it works OK
with older firmware */
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x01, 0x40, 0x14, 0x00,
instance->params.ModemOption,
MODEM_OPTION_LENGTH, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm, "%s failed on URBext2: %d\n", __func__, ret);
/* URBext3 */
buf[0] = instance->params.BMaxDSL & 0xff;
buf[1] = instance->params.BMaxDSL >> 8;
ret = usb_control_msg(usb_dev, usb_sndctrlpipe(usb_dev, 0),
0x01, 0x40, 0x12, 0x00, buf, 2, CTRL_TIMEOUT);
if (ret < 0)
usb_warn(usbatm, "%s failed on URBext3: %d\n", __func__, ret);
}
static int speedtch_upload_firmware(struct speedtch_instance_data *instance,
const struct firmware *fw1,
const struct firmware *fw2)
{
unsigned char *buffer;
struct usbatm_data *usbatm = instance->usbatm;
struct usb_device *usb_dev = usbatm->usb_dev;
int actual_length;
int ret = 0;
int offset;
usb_dbg(usbatm, "%s entered\n", __func__);
if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
ret = -ENOMEM;
usb_dbg(usbatm, "%s: no memory for buffer!\n", __func__);
goto out;
}
if (!usb_ifnum_to_if(usb_dev, 2)) {
ret = -ENODEV;
usb_dbg(usbatm, "%s: interface not found!\n", __func__);
goto out_free;
}
/* URB 7 */
if (dl_512_first) { /* some modems need a read before writing the firmware */
ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
buffer, 0x200, &actual_length, 2000);
if (ret < 0 && ret != -ETIMEDOUT)
usb_warn(usbatm, "%s: read BLOCK0 from modem failed (%d)!\n", __func__, ret);
else
usb_dbg(usbatm, "%s: BLOCK0 downloaded (%d bytes)\n", __func__, ret);
}
/* URB 8 : both leds are static green */
for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) {
int thislen = min_t(int, PAGE_SIZE, fw1->size - offset);
memcpy(buffer, fw1->data + offset, thislen);
ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
buffer, thislen, &actual_length, DATA_TIMEOUT);
if (ret < 0) {
usb_err(usbatm, "%s: write BLOCK1 to modem failed (%d)!\n", __func__, ret);
goto out_free;
}
usb_dbg(usbatm, "%s: BLOCK1 uploaded (%zu bytes)\n", __func__, fw1->size);
}
/* USB led blinking green, ADSL led off */
/* URB 11 */
ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
buffer, 0x200, &actual_length, DATA_TIMEOUT);
if (ret < 0) {
usb_err(usbatm, "%s: read BLOCK2 from modem failed (%d)!\n", __func__, ret);
goto out_free;
}
usb_dbg(usbatm, "%s: BLOCK2 downloaded (%d bytes)\n", __func__, actual_length);
/* URBs 12 to 139 - USB led blinking green, ADSL led off */
for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) {
int thislen = min_t(int, PAGE_SIZE, fw2->size - offset);
memcpy(buffer, fw2->data + offset, thislen);
ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
buffer, thislen, &actual_length, DATA_TIMEOUT);
if (ret < 0) {
usb_err(usbatm, "%s: write BLOCK3 to modem failed (%d)!\n", __func__, ret);
goto out_free;
}
}
usb_dbg(usbatm, "%s: BLOCK3 uploaded (%zu bytes)\n", __func__, fw2->size);
/* USB led static green, ADSL led static red */
/* URB 142 */
ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, ENDPOINT_FIRMWARE),
buffer, 0x200, &actual_length, DATA_TIMEOUT);
if (ret < 0) {
usb_err(usbatm, "%s: read BLOCK4 from modem failed (%d)!\n", __func__, ret);
goto out_free;
}
/* success */
usb_dbg(usbatm, "%s: BLOCK4 downloaded (%d bytes)\n", __func__, actual_length);
/* Delay to allow firmware to start up. We can do this here
because we're in our own kernel thread anyway. */
msleep_interruptible(1000);
if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
usb_err(usbatm, "%s: setting interface to %d failed (%d)!\n", __func__, instance->params.altsetting, ret);
goto out_free;
}
/* Enable software buffering, if requested */
if (sw_buffering)
speedtch_set_swbuff(instance, 1);
/* Magic spell; don't ask us what this does */
speedtch_test_sequence(instance);
ret = 0;
out_free:
free_page((unsigned long)buffer);
out:
return ret;
}
static int speedtch_find_firmware(struct usbatm_data *usbatm, struct usb_interface *intf,
int phase, const struct firmware **fw_p)
{
struct device *dev = &intf->dev;
const u16 bcdDevice = le16_to_cpu(interface_to_usbdev(intf)->descriptor.bcdDevice);
const u8 major_revision = bcdDevice >> 8;
const u8 minor_revision = bcdDevice & 0xff;
char buf[24];
sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision);
usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
if (request_firmware(fw_p, buf, dev)) {
sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision);
usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
if (request_firmware(fw_p, buf, dev)) {
sprintf(buf, "speedtch-%d.bin", phase);
usb_dbg(usbatm, "%s: looking for %s\n", __func__, buf);
if (request_firmware(fw_p, buf, dev)) {
usb_err(usbatm, "%s: no stage %d firmware found!\n", __func__, phase);
return -ENOENT;
}
}
}
usb_info(usbatm, "found stage %d firmware %s\n", phase, buf);
return 0;
}
static int speedtch_heavy_init(struct usbatm_data *usbatm, struct usb_interface *intf)
{
const struct firmware *fw1, *fw2;
struct speedtch_instance_data *instance = usbatm->driver_data;
int ret;
if ((ret = speedtch_find_firmware(usbatm, intf, 1, &fw1)) < 0)
return ret;
if ((ret = speedtch_find_firmware(usbatm, intf, 2, &fw2)) < 0) {
release_firmware(fw1);
return ret;
}
if ((ret = speedtch_upload_firmware(instance, fw1, fw2)) < 0)
usb_err(usbatm, "%s: firmware upload failed (%d)!\n", __func__, ret);
release_firmware(fw2);
release_firmware(fw1);
return ret;
}
/**********
** ATM **
**********/
static int speedtch_read_status(struct speedtch_instance_data *instance)
{
struct usbatm_data *usbatm = instance->usbatm;
struct usb_device *usb_dev = usbatm->usb_dev;
unsigned char *buf = instance->scratch_buffer;
int ret;
memset(buf, 0, 16);
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
CTRL_TIMEOUT);
if (ret < 0) {
atm_dbg(usbatm, "%s: MSG 7 failed\n", __func__);
return ret;
}
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
CTRL_TIMEOUT);
if (ret < 0) {
atm_dbg(usbatm, "%s: MSG B failed\n", __func__);
return ret;
}
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
CTRL_TIMEOUT);
if (ret < 0) {
atm_dbg(usbatm, "%s: MSG D failed\n", __func__);
return ret;
}
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
CTRL_TIMEOUT);
if (ret < 0) {
atm_dbg(usbatm, "%s: MSG E failed\n", __func__);
return ret;
}
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
CTRL_TIMEOUT);
if (ret < 0) {
atm_dbg(usbatm, "%s: MSG F failed\n", __func__);
return ret;
}
return 0;
}
static int speedtch_start_synchro(struct speedtch_instance_data *instance)
{
struct usbatm_data *usbatm = instance->usbatm;
struct usb_device *usb_dev = usbatm->usb_dev;
unsigned char *buf = instance->scratch_buffer;
int ret;
atm_dbg(usbatm, "%s entered\n", __func__);
memset(buf, 0, 2);
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x12, 0xc0, 0x04, 0x00,
buf, 2, CTRL_TIMEOUT);
if (ret < 0)
atm_warn(usbatm, "failed to start ADSL synchronisation: %d\n", ret);
else
atm_dbg(usbatm, "%s: modem prodded. %d bytes returned: %02x %02x\n",
__func__, ret, buf[0], buf[1]);
return ret;
}
static void speedtch_check_status(struct work_struct *work)
{
struct speedtch_instance_data *instance =
container_of(work, struct speedtch_instance_data,
status_check_work);
struct usbatm_data *usbatm = instance->usbatm;
struct atm_dev *atm_dev = usbatm->atm_dev;
unsigned char *buf = instance->scratch_buffer;
int down_speed, up_speed, ret;
unsigned char status;
#ifdef VERBOSE_DEBUG
atm_dbg(usbatm, "%s entered\n", __func__);
#endif
ret = speedtch_read_status(instance);
if (ret < 0) {
atm_warn(usbatm, "error %d fetching device status\n", ret);
instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY);
return;
}
instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY);
status = buf[OFFSET_7];
if ((status != instance->last_status) || !status) {
atm_dbg(usbatm, "%s: line state 0x%02x\n", __func__, status);
switch (status) {
case 0:
atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
if (instance->last_status)
atm_info(usbatm, "ADSL line is down\n");
/* It may never resync again unless we ask it to... */
ret = speedtch_start_synchro(instance);
break;
case 0x08:
atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
atm_info(usbatm, "ADSL line is blocked?\n");
break;
case 0x10:
atm_dev_signal_change(atm_dev, ATM_PHY_SIG_LOST);
atm_info(usbatm, "ADSL line is synchronising\n");
break;
case 0x20:
down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
| (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8)
| (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24);
if (!(down_speed & 0x0000ffff) && !(up_speed & 0x0000ffff)) {
down_speed >>= 16;
up_speed >>= 16;
}
atm_dev->link_rate = down_speed * 1000 / 424;
atm_dev_signal_change(atm_dev, ATM_PHY_SIG_FOUND);
atm_info(usbatm,
"ADSL line is up (%d kb/s down | %d kb/s up)\n",
down_speed, up_speed);
break;
default:
atm_dev_signal_change(atm_dev, ATM_PHY_SIG_UNKNOWN);
atm_info(usbatm, "unknown line state %02x\n", status);
break;
}
instance->last_status = status;
}
}
static void speedtch_status_poll(unsigned long data)
{
struct speedtch_instance_data *instance = (void *)data;
schedule_work(&instance->status_check_work);
/* The following check is racy, but the race is harmless */
if (instance->poll_delay < MAX_POLL_DELAY)
mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(instance->poll_delay));
else
atm_warn(instance->usbatm, "Too many failures - disabling line status polling\n");
}
static void speedtch_resubmit_int(unsigned long data)
{
struct speedtch_instance_data *instance = (void *)data;
struct urb *int_urb = instance->int_urb;
int ret;
atm_dbg(instance->usbatm, "%s entered\n", __func__);
if (int_urb) {
ret = usb_submit_urb(int_urb, GFP_ATOMIC);
if (!ret)
schedule_work(&instance->status_check_work);
else {
atm_dbg(instance->usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
}
}
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
static void speedtch_handle_int(struct urb *int_urb)
{
struct speedtch_instance_data *instance = int_urb->context;
struct usbatm_data *usbatm = instance->usbatm;
unsigned int count = int_urb->actual_length;
int status = int_urb->status;
int ret;
/* The magic interrupt for "up state" */
static const unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 };
/* The magic interrupt for "down state" */
static const unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 };
atm_dbg(usbatm, "%s entered\n", __func__);
if (status < 0) {
atm_dbg(usbatm, "%s: nonzero urb status %d!\n", __func__, status);
goto fail;
}
if ((count == 6) && !memcmp(up_int, instance->int_data, 6)) {
del_timer(&instance->status_check_timer);
atm_info(usbatm, "DSL line goes up\n");
} else if ((count == 6) && !memcmp(down_int, instance->int_data, 6)) {
atm_info(usbatm, "DSL line goes down\n");
} else {
int i;
atm_dbg(usbatm, "%s: unknown interrupt packet of length %d:", __func__, count);
for (i = 0; i < count; i++)
printk(" %02x", instance->int_data[i]);
printk("\n");
goto fail;
}
if ((int_urb = instance->int_urb)) {
ret = usb_submit_urb(int_urb, GFP_ATOMIC);
schedule_work(&instance->status_check_work);
if (ret < 0) {
atm_dbg(usbatm, "%s: usb_submit_urb failed with result %d\n", __func__, ret);
goto fail;
}
}
return;
fail:
if ((int_urb = instance->int_urb))
mod_timer(&instance->resubmit_timer, jiffies + msecs_to_jiffies(RESUBMIT_DELAY));
}
static int speedtch_atm_start(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
{
struct usb_device *usb_dev = usbatm->usb_dev;
struct speedtch_instance_data *instance = usbatm->driver_data;
int i, ret;
unsigned char mac_str[13];
atm_dbg(usbatm, "%s entered\n", __func__);
/* Set MAC address, it is stored in the serial number */
memset(atm_dev->esi, 0, sizeof(atm_dev->esi));
if (usb_string(usb_dev, usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
for (i = 0; i < 6; i++)
atm_dev->esi[i] = (hex_to_bin(mac_str[i * 2]) << 4) +
hex_to_bin(mac_str[i * 2 + 1]);
}
/* Start modem synchronisation */
ret = speedtch_start_synchro(instance);
/* Set up interrupt endpoint */
if (instance->int_urb) {
ret = usb_submit_urb(instance->int_urb, GFP_KERNEL);
if (ret < 0) {
/* Doesn't matter; we'll poll anyway */
atm_dbg(usbatm, "%s: submission of interrupt URB failed (%d)!\n", __func__, ret);
usb_free_urb(instance->int_urb);
instance->int_urb = NULL;
}
}
/* Start status polling */
mod_timer(&instance->status_check_timer, jiffies + msecs_to_jiffies(1000));
return 0;
}
static void speedtch_atm_stop(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
{
struct speedtch_instance_data *instance = usbatm->driver_data;
struct urb *int_urb = instance->int_urb;
atm_dbg(usbatm, "%s entered\n", __func__);
del_timer_sync(&instance->status_check_timer);
/*
* Since resubmit_timer and int_urb can schedule themselves and
* each other, shutting them down correctly takes some care
*/
instance->int_urb = NULL; /* signal shutdown */
mb();
usb_kill_urb(int_urb);
del_timer_sync(&instance->resubmit_timer);
/*
* At this point, speedtch_handle_int and speedtch_resubmit_int
* can run or be running, but instance->int_urb == NULL means that
* they will not reschedule
*/
usb_kill_urb(int_urb);
del_timer_sync(&instance->resubmit_timer);
usb_free_urb(int_urb);
flush_work_sync(&instance->status_check_work);
}
static int speedtch_pre_reset(struct usb_interface *intf)
{
return 0;
}
static int speedtch_post_reset(struct usb_interface *intf)
{
return 0;
}
/**********
** USB **
**********/
static struct usb_device_id speedtch_usb_ids[] = {
{USB_DEVICE(0x06b9, 0x4061)},
{}
};
MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
static int speedtch_usb_probe(struct usb_interface *, const struct usb_device_id *);
static struct usb_driver speedtch_usb_driver = {
.name = speedtch_driver_name,
.probe = speedtch_usb_probe,
.disconnect = usbatm_usb_disconnect,
.pre_reset = speedtch_pre_reset,
.post_reset = speedtch_post_reset,
.id_table = speedtch_usb_ids
};
static void speedtch_release_interfaces(struct usb_device *usb_dev,
int num_interfaces)
{
struct usb_interface *cur_intf;
int i;
for (i = 0; i < num_interfaces; i++)
if ((cur_intf = usb_ifnum_to_if(usb_dev, i))) {
usb_set_intfdata(cur_intf, NULL);
usb_driver_release_interface(&speedtch_usb_driver, cur_intf);
}
}
static int speedtch_bind(struct usbatm_data *usbatm,
struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct usb_interface *cur_intf, *data_intf;
struct speedtch_instance_data *instance;
int ifnum = intf->altsetting->desc.bInterfaceNumber;
int num_interfaces = usb_dev->actconfig->desc.bNumInterfaces;
int i, ret;
int use_isoc;
usb_dbg(usbatm, "%s entered\n", __func__);
/* sanity checks */
if (usb_dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
usb_err(usbatm, "%s: wrong device class %d\n", __func__, usb_dev->descriptor.bDeviceClass);
return -ENODEV;
}
if (!(data_intf = usb_ifnum_to_if(usb_dev, INTERFACE_DATA))) {
usb_err(usbatm, "%s: data interface not found!\n", __func__);
return -ENODEV;
}
/* claim all interfaces */
for (i = 0; i < num_interfaces; i++) {
cur_intf = usb_ifnum_to_if(usb_dev, i);
if ((i != ifnum) && cur_intf) {
ret = usb_driver_claim_interface(&speedtch_usb_driver, cur_intf, usbatm);
if (ret < 0) {
usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, i, ret);
speedtch_release_interfaces(usb_dev, i);
return ret;
}
}
}
instance = kzalloc(sizeof(*instance), GFP_KERNEL);
if (!instance) {
usb_err(usbatm, "%s: no memory for instance data!\n", __func__);
ret = -ENOMEM;
goto fail_release;
}
instance->usbatm = usbatm;
/* module parameters may change at any moment, so take a snapshot */
instance->params.altsetting = altsetting;
instance->params.BMaxDSL = BMaxDSL;
instance->params.ModemMode = ModemMode;
memcpy(instance->params.ModemOption, DEFAULT_MODEM_OPTION, MODEM_OPTION_LENGTH);
memcpy(instance->params.ModemOption, ModemOption, num_ModemOption);
use_isoc = enable_isoc;
if (instance->params.altsetting)
if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, instance->params.altsetting)) < 0) {
usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, instance->params.altsetting, ret);
instance->params.altsetting = 0; /* fall back to default */
}
if (!instance->params.altsetting && use_isoc)
if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_ISOC_ALTSETTING)) < 0) {
usb_dbg(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_ISOC_ALTSETTING, ret);
use_isoc = 0; /* fall back to bulk */
}
if (use_isoc) {
const struct usb_host_interface *desc = data_intf->cur_altsetting;
const __u8 target_address = USB_DIR_IN | usbatm->driver->isoc_in;
use_isoc = 0; /* fall back to bulk if endpoint not found */
for (i = 0; i < desc->desc.bNumEndpoints; i++) {
const struct usb_endpoint_descriptor *endpoint_desc = &desc->endpoint[i].desc;
if ((endpoint_desc->bEndpointAddress == target_address)) {
use_isoc =
usb_endpoint_xfer_isoc(endpoint_desc);
break;
}
}
if (!use_isoc)
usb_info(usbatm, "isochronous transfer not supported - using bulk\n");
}
if (!use_isoc && !instance->params.altsetting)
if ((ret = usb_set_interface(usb_dev, INTERFACE_DATA, DEFAULT_BULK_ALTSETTING)) < 0) {
usb_err(usbatm, "%s: setting interface to %2d failed (%d)!\n", __func__, DEFAULT_BULK_ALTSETTING, ret);
goto fail_free;
}
if (!instance->params.altsetting)
instance->params.altsetting = use_isoc ? DEFAULT_ISOC_ALTSETTING : DEFAULT_BULK_ALTSETTING;
usbatm->flags |= (use_isoc ? UDSL_USE_ISOC : 0);
INIT_WORK(&instance->status_check_work, speedtch_check_status);
init_timer(&instance->status_check_timer);
instance->status_check_timer.function = speedtch_status_poll;
instance->status_check_timer.data = (unsigned long)instance;
instance->last_status = 0xff;
instance->poll_delay = MIN_POLL_DELAY;
init_timer(&instance->resubmit_timer);
instance->resubmit_timer.function = speedtch_resubmit_int;
instance->resubmit_timer.data = (unsigned long)instance;
instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
if (instance->int_urb)
usb_fill_int_urb(instance->int_urb, usb_dev,
usb_rcvintpipe(usb_dev, ENDPOINT_INT),
instance->int_data, sizeof(instance->int_data),
speedtch_handle_int, instance, 50);
else
usb_dbg(usbatm, "%s: no memory for interrupt urb!\n", __func__);
/* check whether the modem already seems to be alive */
ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
0x12, 0xc0, 0x07, 0x00,
instance->scratch_buffer + OFFSET_7, SIZE_7, 500);
usbatm->flags |= (ret == SIZE_7 ? UDSL_SKIP_HEAVY_INIT : 0);
usb_dbg(usbatm, "%s: firmware %s loaded\n", __func__, usbatm->flags & UDSL_SKIP_HEAVY_INIT ? "already" : "not");
if (!(usbatm->flags & UDSL_SKIP_HEAVY_INIT))
if ((ret = usb_reset_device(usb_dev)) < 0) {
usb_err(usbatm, "%s: device reset failed (%d)!\n", __func__, ret);
goto fail_free;
}
usbatm->driver_data = instance;
return 0;
fail_free:
usb_free_urb(instance->int_urb);
kfree(instance);
fail_release:
speedtch_release_interfaces(usb_dev, num_interfaces);
return ret;
}
static void speedtch_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
{
struct usb_device *usb_dev = interface_to_usbdev(intf);
struct speedtch_instance_data *instance = usbatm->driver_data;
usb_dbg(usbatm, "%s entered\n", __func__);
speedtch_release_interfaces(usb_dev, usb_dev->actconfig->desc.bNumInterfaces);
usb_free_urb(instance->int_urb);
kfree(instance);
}
/***********
** init **
***********/
static struct usbatm_driver speedtch_usbatm_driver = {
.driver_name = speedtch_driver_name,
.bind = speedtch_bind,
.heavy_init = speedtch_heavy_init,
.unbind = speedtch_unbind,
.atm_start = speedtch_atm_start,
.atm_stop = speedtch_atm_stop,
.bulk_in = ENDPOINT_BULK_DATA,
.bulk_out = ENDPOINT_BULK_DATA,
.isoc_in = ENDPOINT_ISOC_DATA
};
static int speedtch_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
return usbatm_usb_probe(intf, id, &speedtch_usbatm_driver);
}
module_usb_driver(speedtch_usb_driver);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_VERSION(DRIVER_VERSION);