Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 847 insertions, 0 deletions

diff --git a/drivers/usb/atm/speedtch.c b/drivers/usb/atm/speedtch.c
new file mode 100644
index 00000000000..233f9229bad
--- /dev/null
+++ b/drivers/usb/atm/speedtch.c
@@ -0,0 +1,847 @@
+/******************************************************************************
+ *  speedtch.c  -  Alcatel SpeedTouch USB xDSL modem driver
+ *
+ *  Copyright (C) 2001, Alcatel
+ *  Copyright (C) 2003, Duncan Sands
+ *  Copyright (C) 2004, David Woodhouse
+ *
+ *  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 <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/list.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/crc32.h>
+#include <linux/init.h>
+#include <linux/firmware.h>
+
+#include "usb_atm.h"
+
+#if defined(CONFIG_FW_LOADER) || defined(CONFIG_FW_LOADER_MODULE)
+#	define USE_FW_LOADER
+#endif
+
+#define DRIVER_AUTHOR	"Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
+#define DRIVER_VERSION	"1.8"
+#define DRIVER_DESC	"Alcatel SpeedTouch USB driver version " DRIVER_VERSION
+
+static const char speedtch_driver_name[] = "speedtch";
+
+#define SPEEDTOUCH_VENDORID		0x06b9
+#define SPEEDTOUCH_PRODUCTID		0x4061
+
+/* Timeout in jiffies */
+#define CTRL_TIMEOUT 2000
+#define DATA_TIMEOUT 2000
+
+#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 TOTAL    15
+
+#define SIZE_7 1
+#define SIZE_b 8
+#define SIZE_d 4
+#define SIZE_e 1
+#define SIZE_f 1
+
+static int dl_512_first = 0;
+static int sw_buffering = 0;
+
+module_param(dl_512_first, bool, 0444);
+MODULE_PARM_DESC(dl_512_first, "Read 512 bytes before sending firmware");
+
+module_param(sw_buffering, uint, 0444);
+MODULE_PARM_DESC(sw_buffering, "Enable software buffering");
+
+#define UDSL_IOCTL_LINE_UP		1
+#define UDSL_IOCTL_LINE_DOWN		2
+
+#define SPEEDTCH_ENDPOINT_INT		0x81
+#define SPEEDTCH_ENDPOINT_DATA		0x07
+#define SPEEDTCH_ENDPOINT_FIRMWARE	0x05
+
+#define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) )
+
+static struct usb_device_id speedtch_usb_ids[] = {
+	{USB_DEVICE(SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID)},
+	{}
+};
+
+MODULE_DEVICE_TABLE(usb, speedtch_usb_ids);
+
+struct speedtch_instance_data {
+	struct udsl_instance_data u;
+
+	/* Status */
+	struct urb *int_urb;
+	unsigned char int_data[16];
+	struct work_struct poll_work;
+	struct timer_list poll_timer;
+};
+/* USB */
+
+static int speedtch_usb_probe(struct usb_interface *intf,
+			      const struct usb_device_id *id);
+static void speedtch_usb_disconnect(struct usb_interface *intf);
+static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code,
+			      void *user_data);
+static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs);
+static void speedtch_poll_status(struct speedtch_instance_data *instance);
+
+static struct usb_driver speedtch_usb_driver = {
+	.owner		= THIS_MODULE,
+	.name		= speedtch_driver_name,
+	.probe		= speedtch_usb_probe,
+	.disconnect	= speedtch_usb_disconnect,
+	.ioctl		= speedtch_usb_ioctl,
+	.id_table	= speedtch_usb_ids,
+};
+
+/***************
+**  firmware  **
+***************/
+
+static void speedtch_got_firmware(struct speedtch_instance_data *instance,
+				  int got_it)
+{
+	int err;
+	struct usb_interface *intf;
+
+	down(&instance->u.serialize);	/* vs self, speedtch_firmware_start */
+	if (instance->u.status == UDSL_LOADED_FIRMWARE)
+		goto out;
+	if (!got_it) {
+		instance->u.status = UDSL_NO_FIRMWARE;
+		goto out;
+	}
+	if ((err = usb_set_interface(instance->u.usb_dev, 1, 1)) < 0) {
+		dbg("speedtch_got_firmware: usb_set_interface returned %d!", err);
+		instance->u.status = UDSL_NO_FIRMWARE;
+		goto out;
+	}
+
+	/* Set up interrupt endpoint */
+	intf = usb_ifnum_to_if(instance->u.usb_dev, 0);
+	if (intf && !usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) {
+
+		instance->int_urb = usb_alloc_urb(0, GFP_KERNEL);
+		if (instance->int_urb) {
+
+			usb_fill_int_urb(instance->int_urb, instance->u.usb_dev,
+					 usb_rcvintpipe(instance->u.usb_dev, SPEEDTCH_ENDPOINT_INT),
+					 instance->int_data,
+					 sizeof(instance->int_data),
+					 speedtch_handle_int, instance, 50);
+			err = usb_submit_urb(instance->int_urb, GFP_KERNEL);
+			if (err) {
+				/* Doesn't matter; we'll poll anyway */
+				dbg("speedtch_got_firmware: Submission of interrupt URB failed %d", err);
+				usb_free_urb(instance->int_urb);
+				instance->int_urb = NULL;
+				usb_driver_release_interface(&speedtch_usb_driver, intf);
+			}
+		}
+	}
+	/* Start status polling */
+	mod_timer(&instance->poll_timer, jiffies + (1 * HZ));
+
+	instance->u.status = UDSL_LOADED_FIRMWARE;
+	tasklet_schedule(&instance->u.receive_tasklet);
+ out:
+	up(&instance->u.serialize);
+	wake_up_interruptible(&instance->u.firmware_waiters);
+}
+
+static int speedtch_set_swbuff(struct speedtch_instance_data *instance,
+			       int state)
+{
+	struct usb_device *dev = instance->u.usb_dev;
+	int ret;
+
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      0x32, 0x40, state ? 0x01 : 0x00,
+			      0x00, NULL, 0, 100);
+	if (ret < 0) {
+		printk("Warning: %sabling SW buffering: usb_control_msg returned %d\n",
+		     state ? "En" : "Dis", ret);
+		return ret;
+	}
+
+	dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis");
+	return 0;
+}
+
+static void speedtch_test_sequence(struct speedtch_instance_data *instance)
+{
+	struct usb_device *dev = instance->u.usb_dev;
+	unsigned char buf[10];
+	int ret;
+
+	/* URB 147 */
+	buf[0] = 0x1c;
+	buf[1] = 0x50;
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      0x01, 0x40, 0x0b, 0x00, buf, 2, 100);
+	if (ret < 0)
+		printk(KERN_WARNING "%s failed on URB147: %d\n", __func__, ret);
+
+	/* URB 148 */
+	buf[0] = 0x32;
+	buf[1] = 0x00;
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      0x01, 0x40, 0x02, 0x00, buf, 2, 100);
+	if (ret < 0)
+		printk(KERN_WARNING "%s failed on URB148: %d\n", __func__, ret);
+
+	/* URB 149 */
+	buf[0] = 0x01;
+	buf[1] = 0x00;
+	buf[2] = 0x01;
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      0x01, 0x40, 0x03, 0x00, buf, 3, 100);
+	if (ret < 0)
+		printk(KERN_WARNING "%s failed on URB149: %d\n", __func__, ret);
+
+	/* URB 150 */
+	buf[0] = 0x01;
+	buf[1] = 0x00;
+	buf[2] = 0x01;
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			      0x01, 0x40, 0x04, 0x00, buf, 3, 100);
+	if (ret < 0)
+		printk(KERN_WARNING "%s failed on URB150: %d\n", __func__, ret);
+}
+
+static int speedtch_start_synchro(struct speedtch_instance_data *instance)
+{
+	struct usb_device *dev = instance->u.usb_dev;
+	unsigned char buf[2];
+	int ret;
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      0x12, 0xc0, 0x04, 0x00,
+			      buf, sizeof(buf), CTRL_TIMEOUT);
+	if (ret < 0) {
+		printk(KERN_WARNING "SpeedTouch: Failed to start ADSL synchronisation: %d\n", ret);
+		return ret;
+	}
+
+	dbg("speedtch_start_synchro: modem prodded. %d Bytes returned: %02x %02x", ret, buf[0], buf[1]);
+	return 0;
+}
+
+static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs)
+{
+	struct speedtch_instance_data *instance = urb->context;
+	unsigned int count = urb->actual_length;
+	int ret;
+
+	/* The magic interrupt for "up state" */
+	const static unsigned char up_int[6]   = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 };
+	/* The magic interrupt for "down state" */
+	const static unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated; clean up */
+		dbg("%s - urb shutting down with status: %d", __func__, urb->status);
+		return;
+	default:
+		dbg("%s - nonzero urb status received: %d", __func__, urb->status);
+		goto exit;
+	}
+
+	if (count < 6) {
+		dbg("%s - int packet too short", __func__);
+		goto exit;
+	}
+
+	if (!memcmp(up_int, instance->int_data, 6)) {
+		del_timer(&instance->poll_timer);
+		printk(KERN_NOTICE "DSL line goes up\n");
+	} else if (!memcmp(down_int, instance->int_data, 6)) {
+		printk(KERN_NOTICE "DSL line goes down\n");
+	} else {
+		int i;
+
+		printk(KERN_DEBUG "Unknown interrupt packet of %d bytes:", count);
+		for (i = 0; i < count; i++)
+			printk(" %02x", instance->int_data[i]);
+		printk("\n");
+	}
+	schedule_work(&instance->poll_work);
+
+ exit:
+	rmb();
+	if (!instance->int_urb)
+		return;
+
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+	if (ret)
+		err("%s - usb_submit_urb failed with result %d", __func__, ret);
+}
+
+static int speedtch_get_status(struct speedtch_instance_data *instance,
+			       unsigned char *buf)
+{
+	struct usb_device *dev = instance->u.usb_dev;
+	int ret;
+
+	memset(buf, 0, TOTAL);
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7,
+			      CTRL_TIMEOUT);
+	if (ret < 0) {
+		dbg("MSG 7 failed");
+		return ret;
+	}
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b,
+			      CTRL_TIMEOUT);
+	if (ret < 0) {
+		dbg("MSG B failed");
+		return ret;
+	}
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d,
+			      CTRL_TIMEOUT);
+	if (ret < 0) {
+		dbg("MSG D failed");
+		return ret;
+	}
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e,
+			      CTRL_TIMEOUT);
+	if (ret < 0) {
+		dbg("MSG E failed");
+		return ret;
+	}
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f,
+			      CTRL_TIMEOUT);
+	if (ret < 0) {
+		dbg("MSG F failed");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void speedtch_poll_status(struct speedtch_instance_data *instance)
+{
+	unsigned char buf[TOTAL];
+	int ret;
+
+	ret = speedtch_get_status(instance, buf);
+	if (ret) {
+		printk(KERN_WARNING
+		       "SpeedTouch: Error %d fetching device status\n", ret);
+		return;
+	}
+
+	dbg("Line state %02x", buf[OFFSET_7]);
+
+	switch (buf[OFFSET_7]) {
+	case 0:
+		if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) {
+			instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
+			printk(KERN_NOTICE "ADSL line is down\n");
+		}
+		break;
+
+	case 0x08:
+		if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) {
+			instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
+			printk(KERN_NOTICE "ADSL line is blocked?\n");
+		}
+		break;
+
+	case 0x10:
+		if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) {
+			instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
+			printk(KERN_NOTICE "ADSL line is synchronising\n");
+		}
+		break;
+
+	case 0x20:
+		if (instance->u.atm_dev->signal != ATM_PHY_SIG_FOUND) {
+			int down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8)
+				| (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24);
+			int 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;
+			}
+			instance->u.atm_dev->link_rate = down_speed * 1000 / 424;
+			instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND;
+
+			printk(KERN_NOTICE
+			       "ADSL line is up (%d Kib/s down | %d Kib/s up)\n",
+			       down_speed, up_speed);
+		}
+		break;
+
+	default:
+		if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) {
+			instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
+			printk(KERN_NOTICE "Unknown line state %02x\n", buf[OFFSET_7]);
+		}
+		break;
+	}
+}
+
+static void speedtch_timer_poll(unsigned long data)
+{
+	struct speedtch_instance_data *instance = (void *)data;
+
+	schedule_work(&instance->poll_work);
+	mod_timer(&instance->poll_timer, jiffies + (5 * HZ));
+}
+
+#ifdef USE_FW_LOADER
+static void speedtch_upload_firmware(struct speedtch_instance_data *instance,
+				     const struct firmware *fw1,
+				     const struct firmware *fw2)
+{
+	unsigned char *buffer;
+	struct usb_device *usb_dev = instance->u.usb_dev;
+	struct usb_interface *intf;
+	int actual_length, ret;
+	int offset;
+
+	dbg("speedtch_upload_firmware");
+
+	if (!(intf = usb_ifnum_to_if(usb_dev, 2))) {
+		dbg("speedtch_upload_firmware: interface not found!");
+		goto fail;
+	}
+
+	if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) {
+		dbg("speedtch_upload_firmware: no memory for buffer!");
+		goto fail;
+	}
+
+	/* A user-space firmware loader may already have claimed interface #2 */
+	if ((ret =
+	     usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) < 0) {
+		dbg("speedtch_upload_firmware: interface in use (%d)!", ret);
+		goto fail_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, SPEEDTCH_ENDPOINT_FIRMWARE),
+				   buffer, 0x200, &actual_length, 2000);
+
+		if (ret < 0 && ret != -ETIMEDOUT)
+			dbg("speedtch_upload_firmware: read BLOCK0 from modem failed (%d)!", ret);
+		else
+			dbg("speedtch_upload_firmware: BLOCK0 downloaded (%d bytes)", 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, SPEEDTCH_ENDPOINT_FIRMWARE),
+				   buffer, thislen, &actual_length, DATA_TIMEOUT);
+
+		if (ret < 0) {
+			dbg("speedtch_upload_firmware: write BLOCK1 to modem failed (%d)!", ret);
+			goto fail_release;
+		}
+		dbg("speedtch_upload_firmware: BLOCK1 uploaded (%zu bytes)", fw1->size);
+	}
+
+	/* USB led blinking green, ADSL led off */
+
+	/* URB 11 */
+	ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
+			   buffer, 0x200, &actual_length, DATA_TIMEOUT);
+
+	if (ret < 0) {
+		dbg("speedtch_upload_firmware: read BLOCK2 from modem failed (%d)!", ret);
+		goto fail_release;
+	}
+	dbg("speedtch_upload_firmware: BLOCK2 downloaded (%d bytes)", 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, SPEEDTCH_ENDPOINT_FIRMWARE),
+				   buffer, thislen, &actual_length, DATA_TIMEOUT);
+
+		if (ret < 0) {
+			dbg("speedtch_upload_firmware: write BLOCK3 to modem failed (%d)!", ret);
+			goto fail_release;
+		}
+	}
+	dbg("speedtch_upload_firmware: BLOCK3 uploaded (%zu bytes)", fw2->size);
+
+	/* USB led static green, ADSL led static red */
+
+	/* URB 142 */
+	ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE),
+			   buffer, 0x200, &actual_length, DATA_TIMEOUT);
+
+	if (ret < 0) {
+		dbg("speedtch_upload_firmware: read BLOCK4 from modem failed (%d)!", ret);
+		goto fail_release;
+	}
+
+	/* success */
+	dbg("speedtch_upload_firmware: BLOCK4 downloaded (%d bytes)", actual_length);
+
+	/* Delay to allow firmware to start up. We can do this here
+	   because we're in our own kernel thread anyway. */
+	msleep(1000);
+
+	/* 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);
+
+	/* Start modem synchronisation */
+	if (speedtch_start_synchro(instance))
+		dbg("speedtch_start_synchro: failed");
+
+	speedtch_got_firmware(instance, 1);
+
+	free_page((unsigned long)buffer);
+	return;
+
+ fail_release:
+	/* Only release interface #2 if uploading failed; we don't release it
+	   we succeeded.  This prevents the userspace tools from trying to load
+	   the firmware themselves */
+	usb_driver_release_interface(&speedtch_usb_driver, intf);
+ fail_free:
+	free_page((unsigned long)buffer);
+ fail:
+	speedtch_got_firmware(instance, 0);
+}
+
+static int speedtch_find_firmware(struct speedtch_instance_data
+				  *instance, int phase,
+				  const struct firmware **fw_p)
+{
+	char buf[24];
+	const u16 bcdDevice = le16_to_cpu(instance->u.usb_dev->descriptor.bcdDevice);
+	const u8 major_revision = bcdDevice >> 8;
+	const u8 minor_revision = bcdDevice & 0xff;
+
+	sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision);
+	dbg("speedtch_find_firmware: looking for %s", buf);
+
+	if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
+		sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision);
+		dbg("speedtch_find_firmware: looking for %s", buf);
+
+		if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
+			sprintf(buf, "speedtch-%d.bin", phase);
+			dbg("speedtch_find_firmware: looking for %s", buf);
+
+			if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) {
+				dev_warn(&instance->u.usb_dev->dev, "no stage %d firmware found!", phase);
+				return -ENOENT;
+			}
+		}
+	}
+
+	dev_info(&instance->u.usb_dev->dev, "found stage %d firmware %s\n", phase, buf);
+
+	return 0;
+}
+
+static int speedtch_load_firmware(void *arg)
+{
+	const struct firmware *fw1, *fw2;
+	struct speedtch_instance_data *instance = arg;
+
+	BUG_ON(!instance);
+
+	daemonize("firmware/speedtch");
+
+	if (!speedtch_find_firmware(instance, 1, &fw1)) {
+		if (!speedtch_find_firmware(instance, 2, &fw2)) {
+			speedtch_upload_firmware(instance, fw1, fw2);
+			release_firmware(fw2);
+		}
+		release_firmware(fw1);
+	}
+
+	/* In case we failed, set state back to NO_FIRMWARE so that
+	   another later attempt may work. Otherwise, we never actually
+	   manage to recover if, for example, the firmware is on /usr and
+	   we look for it too early. */
+	speedtch_got_firmware(instance, 0);
+
+	module_put(THIS_MODULE);
+	udsl_put_instance(&instance->u);
+	return 0;
+}
+#endif /* USE_FW_LOADER */
+
+static void speedtch_firmware_start(struct speedtch_instance_data *instance)
+{
+#ifdef USE_FW_LOADER
+	int ret;
+#endif
+
+	dbg("speedtch_firmware_start");
+
+	down(&instance->u.serialize);	/* vs self, speedtch_got_firmware */
+
+	if (instance->u.status >= UDSL_LOADING_FIRMWARE) {
+		up(&instance->u.serialize);
+		return;
+	}
+
+	instance->u.status = UDSL_LOADING_FIRMWARE;
+	up(&instance->u.serialize);
+
+#ifdef USE_FW_LOADER
+	udsl_get_instance(&instance->u);
+	try_module_get(THIS_MODULE);
+
+	ret = kernel_thread(speedtch_load_firmware, instance,
+			    CLONE_FS | CLONE_FILES);
+
+	if (ret >= 0)
+		return;		/* OK */
+
+	dbg("speedtch_firmware_start: kernel_thread failed (%d)!", ret);
+
+	module_put(THIS_MODULE);
+	udsl_put_instance(&instance->u);
+	/* Just pretend it never happened... hope modem_run happens */
+#endif				/* USE_FW_LOADER */
+
+	speedtch_got_firmware(instance, 0);
+}
+
+static int speedtch_firmware_wait(struct udsl_instance_data *instance)
+{
+	speedtch_firmware_start((void *)instance);
+
+	if (wait_event_interruptible(instance->firmware_waiters, instance->status != UDSL_LOADING_FIRMWARE) < 0)
+		return -ERESTARTSYS;
+
+	return (instance->status == UDSL_LOADED_FIRMWARE) ? 0 : -EAGAIN;
+}
+
+/**********
+**  USB  **
+**********/
+
+static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code,
+			      void *user_data)
+{
+	struct speedtch_instance_data *instance = usb_get_intfdata(intf);
+
+	dbg("speedtch_usb_ioctl entered");
+
+	if (!instance) {
+		dbg("speedtch_usb_ioctl: NULL instance!");
+		return -ENODEV;
+	}
+
+	switch (code) {
+	case UDSL_IOCTL_LINE_UP:
+		instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND;
+		speedtch_got_firmware(instance, 1);
+		return (instance->u.status == UDSL_LOADED_FIRMWARE) ? 0 : -EIO;
+	case UDSL_IOCTL_LINE_DOWN:
+		instance->u.atm_dev->signal = ATM_PHY_SIG_LOST;
+		return 0;
+	default:
+		return -ENOTTY;
+	}
+}
+
+static int speedtch_usb_probe(struct usb_interface *intf,
+			      const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	int ifnum = intf->altsetting->desc.bInterfaceNumber;
+	struct speedtch_instance_data *instance;
+	unsigned char mac_str[13];
+	int ret, i;
+	char buf7[SIZE_7];
+
+	dbg("speedtch_usb_probe: trying device with vendor=0x%x, product=0x%x, ifnum %d",
+	    le16_to_cpu(dev->descriptor.idVendor),
+	    le16_to_cpu(dev->descriptor.idProduct), ifnum);
+
+	if ((dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) || 
+	    (ifnum != 1))
+		return -ENODEV;
+
+	dbg("speedtch_usb_probe: device accepted");
+
+	/* instance init */
+	instance = kmalloc(sizeof(*instance), GFP_KERNEL);
+	if (!instance) {
+		dbg("speedtch_usb_probe: no memory for instance data!");
+		return -ENOMEM;
+	}
+
+	memset(instance, 0, sizeof(struct speedtch_instance_data));
+
+	if ((ret = usb_set_interface(dev, 0, 0)) < 0)
+		goto fail;
+
+	if ((ret = usb_set_interface(dev, 2, 0)) < 0)
+		goto fail;
+
+	instance->u.data_endpoint = SPEEDTCH_ENDPOINT_DATA;
+	instance->u.firmware_wait = speedtch_firmware_wait;
+	instance->u.driver_name = speedtch_driver_name;
+
+	ret = udsl_instance_setup(dev, &instance->u);
+	if (ret)
+		goto fail;
+
+	init_timer(&instance->poll_timer);
+	instance->poll_timer.function = speedtch_timer_poll;
+	instance->poll_timer.data = (unsigned long)instance;
+
+	INIT_WORK(&instance->poll_work, (void *)speedtch_poll_status, instance);
+
+	/* set MAC address, it is stored in the serial number */
+	memset(instance->u.atm_dev->esi, 0, sizeof(instance->u.atm_dev->esi));
+	if (usb_string(dev, dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) {
+		for (i = 0; i < 6; i++)
+			instance->u.atm_dev->esi[i] =
+				(hex2int(mac_str[i * 2]) * 16) + (hex2int(mac_str[i * 2 + 1]));
+	}
+
+	/* First check whether the modem already seems to be alive */
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			      0x12, 0xc0, 0x07, 0x00, buf7, SIZE_7, 500);
+
+	if (ret == SIZE_7) {
+		dbg("firmware appears to be already loaded");
+		speedtch_got_firmware(instance, 1);
+		speedtch_poll_status(instance);
+	} else {
+		speedtch_firmware_start(instance);
+	}
+
+	usb_set_intfdata(intf, instance);
+
+	return 0;
+
+ fail:
+	kfree(instance);
+
+	return -ENOMEM;
+}
+
+static void speedtch_usb_disconnect(struct usb_interface *intf)
+{
+	struct speedtch_instance_data *instance = usb_get_intfdata(intf);
+
+	dbg("speedtch_usb_disconnect entered");
+
+	if (!instance) {
+		dbg("speedtch_usb_disconnect: NULL instance!");
+		return;
+	}
+
+/*QQ need to handle disconnects on interface #2 while uploading firmware */
+/*QQ and what about interface #1? */
+
+	if (instance->int_urb) {
+		struct urb *int_urb = instance->int_urb;
+		instance->int_urb = NULL;
+		wmb();
+		usb_unlink_urb(int_urb);
+		usb_free_urb(int_urb);
+	}
+
+	instance->int_data[0] = 1;
+	del_timer_sync(&instance->poll_timer);
+	wmb();
+	flush_scheduled_work();
+
+	udsl_instance_disconnect(&instance->u);
+
+	/* clean up */
+	usb_set_intfdata(intf, NULL);
+	udsl_put_instance(&instance->u);
+}
+
+/***********
+**  init  **
+***********/
+
+static int __init speedtch_usb_init(void)
+{
+	dbg("speedtch_usb_init: driver version " DRIVER_VERSION);
+
+	return usb_register(&speedtch_usb_driver);
+}
+
+static void __exit speedtch_usb_cleanup(void)
+{
+	dbg("speedtch_usb_cleanup entered");
+
+	usb_deregister(&speedtch_usb_driver);
+}
+
+module_init(speedtch_usb_init);
+module_exit(speedtch_usb_cleanup);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRIVER_VERSION);