[IRDA]: Support for Sigmatel STIR421x chip (137dc023) · Commits · 戴 / test

drivers/net/irda/irda-usb.c

+343 −20

Original line number	Diff line number	Diff line
		/*****************************************************************************
		*
		* Filename: irda-usb.c
		* Version: 0.9b
		* Version: 0.10
		* Description: IrDA-USB Driver
		* Status: Experimental
		* Author: Dag Brattli <dag@brattli.net>
		@@ -9,6 +9,9 @@
		* Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
		* Copyright (C) 2001, Dag Brattli <dag@brattli.net>
		* Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
		* Copyright (C) 2004, SigmaTel, Inc. <irquality@sigmatel.com>
		* Copyright (C) 2005, Milan Beno <beno@pobox.sk>
		* Copyright (C) 2006, Nick Fedchik <nick@fedchik.org.ua>
		*
		* 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
		@@ -61,6 +64,7 @@
		#include <linux/slab.h>
		#include <linux/rtnetlink.h>
		#include <linux/usb.h>
		#include <linux/firmware.h>

		#include "irda-usb.h"

		@@ -78,6 +82,10 @@ static struct usb_device_id dongles[] = {
		{ USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG \| IUC_NO_WINDOW },
		/* Extended Systems, Inc., XTNDAccess IrDA USB (ESI-9685) */
		{ USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG \| IUC_NO_WINDOW },
		/* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */
		{ USB_DEVICE(0x66f, 0x4210), .driver_info = IUC_STIR_4210 \| IUC_SPEED_BUG },
		{ USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR_4210 \| IUC_SPEED_BUG },
		{ USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR_4210 \| IUC_SPEED_BUG },
		{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \|
		USB_DEVICE_ID_MATCH_INT_SUBCLASS,
		.bInterfaceClass = USB_CLASS_APP_SPEC,
		@@ -99,6 +107,7 @@ MODULE_DEVICE_TABLE(usb, dongles);

		/------------------------------------------------------------------/

		static void irda_usb_init_qos(struct irda_usb_cb *self) ;
		static struct irda_class_desc irda_usb_find_class_desc(struct usb_interface intf);
		static void irda_usb_disconnect(struct usb_interface *intf);
		static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self);
		@@ -141,7 +150,24 @@ static void irda_usb_build_header(struct irda_usb_cb *self,
		__u8 *header,
		int force)
		{
		/* Set the negotiated link speed */
		/* Here we check if we have an STIR421x chip,
		* and if either speed or xbofs (or both) needs
		* to be changed.
		*/
		if (self->capability & IUC_STIR_4210 &&
		((self->new_speed != -1) \|\| (self->new_xbofs != -1))) {

		/* With STIR421x, speed and xBOFs must be set at the same
		* time, even if only one of them changes.
		*/
		if (self->new_speed == -1)
		self->new_speed = self->speed ;

		if (self->new_xbofs == -1)
		self->new_xbofs = self->xbofs ;
		}

		/* Set the link speed */
		if (self->new_speed != -1) {
		/* Hum... Ugly hack :-(
		* Some device are not compliant with the spec and change
		@@ -191,6 +217,10 @@ static void irda_usb_build_header(struct irda_usb_cb *self,
		*header = SPEED_4000000;
		self->new_xbofs = 0;
		break;
		case 16000000:
		*header = SPEED_16000000;
		self->new_xbofs = 0;
		break;
		}
		} else
		/* No change */
		@@ -235,6 +265,32 @@ static void irda_usb_build_header(struct irda_usb_cb *self,
		}
		}

		/*
		* calculate turnaround time for SigmaTel header
		*/
		static __u8 get_turnaround_time(struct sk_buff *skb)
		{
		int turnaround_time = irda_get_mtt(skb);

		if ( turnaround_time == 0 )
		return 0;
		else if ( turnaround_time <= 10 )
		return 1;
		else if ( turnaround_time <= 50 )
		return 2;
		else if ( turnaround_time <= 100 )
		return 3;
		else if ( turnaround_time <= 500 )
		return 4;
		else if ( turnaround_time <= 1000 )
		return 5;
		else if ( turnaround_time <= 5000 )
		return 6;
		else
		return 7;
		}


		/------------------------------------------------------------------/
		/*
		* Send a command to change the speed of the dongle
		@@ -262,12 +318,18 @@ static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
		/* Set the new speed and xbofs in this fake frame */
		irda_usb_build_header(self, frame, 1);

		if ( self->capability & IUC_STIR_4210 ) {
		if (frame[0] == 0) return ; // do nothing if no change
		frame[1] = 0; // other parameters don't change here
		frame[2] = 0;
		}

		/* Submit the 0 length IrDA frame to trigger new speed settings */
		usb_fill_bulk_urb(urb, self->usbdev,
		usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
		frame, IRDA_USB_SPEED_MTU,
		speed_bulk_callback, self);
		urb->transfer_buffer_length = USB_IRDA_HEADER;
		urb->transfer_buffer_length = self->header_length;
		urb->transfer_flags = 0;

		/* Irq disabled -> GFP_ATOMIC */
		@@ -383,16 +445,35 @@ static int irda_usb_hard_xmit(struct sk_buff skb, struct net_device netdev)
		* allocation will be done lower in skb_push().
		* Also, we don't use directly skb_cow(), because it require
		* headroom >= 16, which force unnecessary copies - Jean II */
		if (skb_headroom(skb) < USB_IRDA_HEADER) {
		if (skb_headroom(skb) < self->header_length) {
		IRDA_DEBUG(0, "%s(), Insuficient skb headroom.\n", __FUNCTION__);
		if (skb_cow(skb, USB_IRDA_HEADER)) {
		if (skb_cow(skb, self->header_length)) {
		IRDA_WARNING("%s(), failed skb_cow() !!!\n", __FUNCTION__);
		goto drop;
		}
		}

		/* Change setting for next frame */
		irda_usb_build_header(self, skb_push(skb, USB_IRDA_HEADER), 0);

		if ( self->capability & IUC_STIR_4210 ) {
		__u8 turnaround_time;
		__u8* frame;
		turnaround_time = get_turnaround_time( skb );
		frame= skb_push(skb, self->header_length);
		irda_usb_build_header(self, frame, 0);
		frame[2] = turnaround_time;
		if ((skb->len != 0) &&
		((skb->len % 128) == 0) &&
		((skb->len % 512) != 0)) {
		/* add extra byte for special SigmaTel feature */
		frame[1] = 1;
		skb_put(skb, 1);
		} else {
		frame[1] = 0;
		}
		} else {
		irda_usb_build_header(self, skb_push(skb, self->header_length), 0);
		}

		/* FIXME: Make macro out of this one */
		((struct irda_skb_cb *)skb->cb)->context = self;
		@@ -795,7 +876,7 @@ static void irda_usb_receive(struct urb urb, struct pt_regs regs)
		}

		/* Check for empty frames */
		if (urb->actual_length <= USB_IRDA_HEADER) {
		if (urb->actual_length <= self->header_length) {
		IRDA_WARNING("%s(), empty frame!\n", __FUNCTION__);
		goto done;
		}
		@@ -816,7 +897,11 @@ static void irda_usb_receive(struct urb urb, struct pt_regs regs)
		docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);

		/* Allocate a new skb */
		if ( self->capability & IUC_STIR_4210 )
		newskb = dev_alloc_skb(docopy ? urb->actual_length : IRDA_SKB_MAX_MTU + USB_IRDA_SIGMATEL_HEADER);
		else
		newskb = dev_alloc_skb(docopy ? urb->actual_length : IRDA_SKB_MAX_MTU);

		if (!newskb) {
		self->stats.rx_dropped++;
		/* We could deliver the current skb, but this would stall
		@@ -845,7 +930,7 @@ static void irda_usb_receive(struct urb urb, struct pt_regs regs)

		/* Set proper length on skb & remove USB-IrDA header */
		skb_put(dataskb, urb->actual_length);
		skb_pull(dataskb, USB_IRDA_HEADER);
		skb_pull(dataskb, self->header_length);

		/* Ask the networking layer to queue the packet for the IrDA stack */
		dataskb->dev = self->netdev;
		@@ -937,6 +1022,191 @@ static int irda_usb_is_receiving(struct irda_usb_cb *self)
		return 0; /* For now */
		}


		#define STIR421X_PATCH_PRODUCT_VERSION_STR "Product Version: "
		#define STIR421X_PATCH_COMPONENT_VERSION_STR "Component Version: "
		#define STIR421X_PATCH_DATA_TAG_STR "STMP"
		#define STIR421X_PATCH_FILE_VERSION_MAX_OFFSET 512 /* version info is before here */
		#define STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET 512 /* patch image starts before here */
		#define STIR421X_PATCH_FILE_END_OF_HEADER_TAG 0x1A /* marks end of patch file header (PC DOS text file EOF character) */

		/*
		* Known firmware patches for STIR421x dongles
		*/
		static char * stir421x_patches[] = {
		"42101001.sb",
		"42101002.sb",
		};

		static int stir421x_get_patch_version(unsigned char * patch, const unsigned long patch_len)
		{
		unsigned int version_offset;
		unsigned long version_major, version_minor, version_build;
		unsigned char * version_start;
		int version_found = 0;

		for (version_offset = 0;
		version_offset < STIR421X_PATCH_FILE_END_OF_HEADER_TAG;
		version_offset++) {
		if (!memcmp(patch + version_offset,
		STIR421X_PATCH_PRODUCT_VERSION_STR,
		sizeof(STIR421X_PATCH_PRODUCT_VERSION_STR) - 1)) {
		version_found = 1;
		version_start = patch +
		version_offset +
		sizeof(STIR421X_PATCH_PRODUCT_VERSION_STR) - 1;
		break;
		}
		}

		/* We couldn't find a product version on this patch */
		if (!version_found)
		return -EINVAL;

		/* Let's check if the product version is dotted */
		if (version_start[3] != '.' \|\|
		version_start[7] != '.')
		return -EINVAL;

		version_major = simple_strtoul(version_start, NULL, 10);
		version_minor = simple_strtoul(version_start + 4, NULL, 10);
		version_build = simple_strtoul(version_start + 8, NULL, 10);

		IRDA_DEBUG(2, "%s(), Major: %ld Minor: %ld Build: %ld\n",
		__FUNCTION__,
		version_major, version_minor, version_build);

		return (((version_major) << 12) +
		((version_minor) << 8) +
		((version_build / 10) << 4) +
		(version_build % 10));

		}


		static int stir421x_upload_patch (struct irda_usb_cb *self,
		unsigned char * patch,
		const unsigned int patch_len)
		{
		int retval = 0;
		int actual_len;
		unsigned int i = 0, download_amount = 0;
		unsigned char * patch_chunk;

		IRDA_DEBUG (2, "%s(), Uploading STIR421x Patch\n", __FUNCTION__);

		patch_chunk = kzalloc(STIR421X_MAX_PATCH_DOWNLOAD_SIZE, GFP_KERNEL);
		if (patch_chunk == NULL)
		return -ENOMEM;

		/* break up patch into 1023-byte sections */
		for (i = 0; retval >= 0 && i < patch_len; i += download_amount) {
		download_amount = patch_len - i;
		if (download_amount > STIR421X_MAX_PATCH_DOWNLOAD_SIZE)
		download_amount = STIR421X_MAX_PATCH_DOWNLOAD_SIZE;

		/* download the patch section */
		memcpy(patch_chunk, patch + i, download_amount);

		retval = usb_bulk_msg (self->usbdev,
		usb_sndbulkpipe (self->usbdev,
		self->bulk_out_ep),
		patch_chunk, download_amount,
		&actual_len, msecs_to_jiffies (500));
		IRDA_DEBUG (2, "%s(), Sent %u bytes\n", __FUNCTION__,
		actual_len);
		if (retval == 0)
		mdelay(10);
		}

		kfree(patch_chunk);

		if (i != patch_len) {
		IRDA_ERROR ("%s(), Pushed %d bytes (!= patch_len (%d))\n",
		__FUNCTION__, i, patch_len);
		retval = -EIO;
		}

		if (retval < 0)
		/* todo - mark device as not ready */
		IRDA_ERROR ("%s(), STIR421x patch upload failed (%d)\n",
		__FUNCTION__, retval);

		return retval;
		}


		static int stir421x_patch_device(struct irda_usb_cb *self)
		{
		unsigned int i, patch_found = 0, data_found = 0, data_offset;
		int patch_version, ret = 0;
		const struct firmware *fw_entry;

		for (i = 0; i < ARRAY_SIZE(stir421x_patches); i++) {
		if(request_firmware(&fw_entry, stir421x_patches[i], &self->usbdev->dev) != 0) {
		IRDA_ERROR( "%s(), Patch %s is not available\n", __FUNCTION__, stir421x_patches[i]);
		continue;
		}

		/* We found a patch from userspace */
		patch_version = stir421x_get_patch_version (fw_entry->data, fw_entry->size);

		if (patch_version < 0) {
		/* Couldn't fetch a version, let's move on to the next file */
		IRDA_ERROR("%s(), version parsing failed\n", __FUNCTION__);
		ret = patch_version;
		release_firmware(fw_entry);
		continue;
		}

		if (patch_version != self->usbdev->descriptor.bcdDevice) {
		/* Patch version and device don't match */
		IRDA_ERROR ("%s(), wrong patch version (%d <-> %d)\n",
		__FUNCTION__,
		patch_version, self->usbdev->descriptor.bcdDevice);
		ret = -EINVAL;
		release_firmware(fw_entry);
		continue;
		}

		/* If we're here, we've found a correct patch */
		patch_found = 1;
		break;

		}

		/* We couldn't find a valid firmware, let's leave */
		if (!patch_found)
		return ret;

		/* The actual image starts after the "STMP" keyword */
		for (data_offset = 0; data_offset < STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET; data_offset++) {
		if (!memcmp(fw_entry->data + data_offset,
		STIR421X_PATCH_DATA_TAG_STR,
		sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET))) {
		IRDA_DEBUG(2, "%s(), found patch data for STIR421x at offset %d\n",
		__FUNCTION__, data_offset);
		data_found = 1;
		break;
		}
		}

		/* We couldn't find "STMP" from the header */
		if (!data_found)
		return -EINVAL;

		/* Let's upload the patch to the target */
		ret = stir421x_upload_patch(self,
		&fw_entry->data[data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)],
		fw_entry->size - (data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)));

		release_firmware(fw_entry);

		return ret;

		}


		/******************** IRDA DEVICE CALLBACKS ********************/
		/*
		* Main calls from the IrDA/Network subsystem.
		@@ -972,6 +1242,11 @@ static int irda_usb_net_open(struct net_device *netdev)
		return -1;
		}

		if(self->needspatch) {
		IRDA_WARNING("%s(), device needs patch\n", __FUNCTION__) ;
		return -EIO ;
		}

		/* Initialise default speed and xbofs value
		* (IrLAP will change that soon) */
		self->speed = -1;
		@@ -1050,7 +1325,7 @@ static int irda_usb_net_close(struct net_device *netdev)
		del_timer(&self->rx_defer_timer);

		/* Deallocate all the Rx path buffers (URBs and skb) */
		for (i = 0; i < IU_MAX_RX_URBS; i++) {
		for (i = 0; i < self->max_rx_urb; i++) {
		struct urb *urb = self->rx_urb[i];
		struct sk_buff skb = (struct sk_buff ) urb->context;
		/* Cancel the receive command */
		@@ -1426,8 +1701,22 @@ static int irda_usb_probe(struct usb_interface *intf,
		spin_lock_init(&self->lock);
		init_timer(&self->rx_defer_timer);

		self->capability = id->driver_info;
		self->needspatch = ((self->capability & IUC_STIR_4210) != 0) ;

		/* Create all of the needed urbs */
		for (i = 0; i < IU_MAX_RX_URBS; i++) {
		if (self->capability & IUC_STIR_4210) {
		self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
		self->header_length = USB_IRDA_SIGMATEL_HEADER;
		} else {
		self->max_rx_urb = IU_MAX_RX_URBS;
		self->header_length = USB_IRDA_HEADER;
		}

		self->rx_urb = kzalloc(self->max_rx_urb * sizeof(struct urb *),
		GFP_KERNEL);

		for (i = 0; i < self->max_rx_urb; i++) {
		self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
		if (!self->rx_urb[i]) {
		goto err_out_1;
		@@ -1479,17 +1768,28 @@ static int irda_usb_probe(struct usb_interface *intf,
		goto err_out_3;
		}

		self->usbdev = dev;

		/* Find IrDA class descriptor */
		irda_desc = irda_usb_find_class_desc(intf);
		ret = -ENODEV;
		if (irda_desc == NULL)
		goto err_out_3;

		if (self->needspatch) {
		ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
		0x02, 0x40, 0, 0, 0, 0, msecs_to_jiffies(500));
		if (ret < 0) {
		IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
		goto err_out_3;
		} else {
		mdelay(10);
		}
		}

		self->irda_desc = irda_desc;
		self->present = 1;
		self->netopen = 0;
		self->capability = id->driver_info;
		self->usbdev = dev;
		self->usbintf = intf;

		/* Allocate the buffer for speed changes */
		@@ -1508,6 +1808,28 @@ static int irda_usb_probe(struct usb_interface *intf,

		IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
		usb_set_intfdata(intf, self);

		if (self->needspatch) {
		/* Now we fetch and upload the firmware patch */
		ret = stir421x_patch_device(self);
		self->needspatch = (ret < 0);
		if (ret < 0) {
		printk("patch_device failed\n");
		goto err_out_4;
		}

		/* replace IrDA class descriptor with what patched device is now reporting */
		irda_desc = irda_usb_find_class_desc (self->usbintf);
		if (irda_desc == NULL) {
		ret = -ENODEV;
		goto err_out_4;
		}
		if (self->irda_desc)
		kfree (self->irda_desc);
		self->irda_desc = irda_desc;
		irda_usb_init_qos(self);
		}

		return 0;

		err_out_4:
		@@ -1518,7 +1840,7 @@ err_out_3:
		err_out_2:
		usb_free_urb(self->tx_urb);
		err_out_1:
		for (i = 0; i < IU_MAX_RX_URBS; i++) {
		for (i = 0; i < self->max_rx_urb; i++) {
		if (self->rx_urb[i])
		usb_free_urb(self->rx_urb[i]);
		}
		@@ -1571,7 +1893,7 @@ static void irda_usb_disconnect(struct usb_interface *intf)
		/netif_device_detach(self->netdev);/
		netif_stop_queue(self->netdev);
		/* Stop all the receive URBs. Must be synchronous. */
		for (i = 0; i < IU_MAX_RX_URBS; i++)
		for (i = 0; i < self->max_rx_urb; i++)
		usb_kill_urb(self->rx_urb[i]);
		/* Cancel Tx and speed URB.
		* Make sure it's synchronous to avoid races. */
		@@ -1586,8 +1908,9 @@ static void irda_usb_disconnect(struct usb_interface *intf)
		self->usbintf = NULL;

		/* Clean up our urbs */
		for (i = 0; i < IU_MAX_RX_URBS; i++)
		for (i = 0; i < self->max_rx_urb; i++)
		usb_free_urb(self->rx_urb[i]);
		kfree(self->rx_urb);
		/* Clean up Tx and speed URB */
		usb_free_urb(self->tx_urb);
		usb_free_urb(self->speed_urb);
		@@ -1648,6 +1971,6 @@ module_exit(usb_irda_cleanup);
		*/
		module_param(qos_mtt_bits, int, 0);
		MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
		MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net> and Jean Tourrilhes <jt@hpl.hp.com>");
		MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>");
		MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
		MODULE_LICENSE("GPL");

drivers/net/irda/irda-usb.h

+29 −14

Original line number	Diff line number	Diff line
		/*****************************************************************************
		*
		* Filename: irda-usb.h
		* Version: 0.9b
		* Version: 0.10
		* Description: IrDA-USB Driver
		* Status: Experimental
		* Author: Dag Brattli <dag@brattli.net>
		@@ -9,6 +9,9 @@
		* Copyright (C) 2001, Roman Weissgaerber <weissg@vienna.at>
		* Copyright (C) 2000, Dag Brattli <dag@brattli.net>
		* Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
		* Copyright (C) 2004, SigmaTel, Inc. <irquality@sigmatel.com>
		* Copyright (C) 2005, Milan Beno <beno@pobox.sk>
		* Copyright (C) 2006, Nick FEdchik <nick@fedchik.org.ua>
		*
		* 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
		@@ -31,6 +34,9 @@
		#include <net/irda/irda.h>
		#include <net/irda/irda_device.h> /* struct irlap_cb */

		#define PATCH_FILE_SIZE_MAX 65536
		#define PATCH_FILE_SIZE_MIN 80

		#define RX_COPY_THRESHOLD 200
		#define IRDA_USB_MAX_MTU 2051
		#define IRDA_USB_SPEED_MTU 64 /* Weird, but work like this */
		@@ -88,6 +94,7 @@
		#define SPEED_576000 0x07
		#define SPEED_1152000 0x08
		#define SPEED_4000000 0x09
		#define SPEED_16000000 0x0a

		/* Basic capabilities */
		#define IUC_DEFAULT 0x00 /* Basic device compliant with 1.0 spec */
		@@ -100,11 +107,14 @@
		#define IUC_SMALL_PKT 0x10 /* Device doesn't behave with big Rx packets */
		#define IUC_MAX_WINDOW 0x20 /* Device underestimate the Rx window */
		#define IUC_MAX_XBOFS 0x40 /* Device need more xbofs than advertised */
		#define IUC_STIR_4210 0x80 /* SigmaTel 4210/4220/4116 VFIR */

		/* USB class definitions */
		#define USB_IRDA_HEADER 0x01
		#define USB_CLASS_IRDA 0x02 /* USB_CLASS_APP_SPEC subclass */
		#define USB_DT_IRDA 0x21
		#define USB_IRDA_SIGMATEL_HEADER 0x03
		#define IU_SIGMATEL_MAX_RX_URBS (IU_MAX_ACTIVE_RX_URBS + USB_IRDA_SIGMATEL_HEADER)

		struct irda_class_desc {
		__u8 bLength;
		@@ -123,6 +133,7 @@ struct irda_class_desc {
		* (6.2.5, USB-IrDA class spec 1.0) */

		#define IU_REQ_GET_CLASS_DESC 0x06
		#define STIR421X_MAX_PATCH_DOWNLOAD_SIZE 1023

		struct irda_usb_cb {
		struct irda_class_desc *irda_desc;
		@@ -136,7 +147,8 @@ struct irda_usb_cb {
		__u16 bulk_out_mtu; /* Max Tx packet size in bytes */
		__u8 bulk_int_ep; /* Interrupt Endpoint assignments */

		struct urb rx_urb[IU_MAX_RX_URBS]; / URBs used to receive data frames */
		__u8 max_rx_urb;
		struct urb *rx_urb; / URBs used to receive data frames */
		struct urb idle_rx_urb; / Pointer to idle URB in Rx path */
		struct urb tx_urb; / URB used to send data frames */
		struct urb speed_urb; / URB used to send speed commands */
		@@ -157,6 +169,9 @@ struct irda_usb_cb {
		__u32 speed; /* Current speed */
		__s32 new_speed; /* speed we need to set */

		__u8 header_length; /* USB-IrDA frame header size */
		int needspatch; /* device needs firmware patch */

		struct timer_list rx_defer_timer; /* Wait for Rx error to clear */
		};

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