1/*****************************************************************************
   2 *
   3 * Filename:      irda-usb.c
   4 * Version:       0.10
   5 * Description:   IrDA-USB Driver
   6 * Status:        Experimental 
   7 * Author:        Dag Brattli <dag@brattli.net>
   8 *
   9 *	Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
  10 *      Copyright (C) 2001, Dag Brattli <dag@brattli.net>
  11 *      Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
  12 *      Copyright (C) 2004, SigmaTel, Inc. <irquality@sigmatel.com>
  13 *      Copyright (C) 2005, Milan Beno <beno@pobox.sk>
  14 *      Copyright (C) 2006, Nick Fedchik <nick@fedchik.org.ua>
  15 *          
  16 *	This program is free software; you can redistribute it and/or modify
  17 *	it under the terms of the GNU General Public License as published by
  18 *	the Free Software Foundation; either version 2 of the License, or
  19 *	(at your option) any later version.
  20 *
  21 *	This program is distributed in the hope that it will be useful,
  22 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 *	GNU General Public License for more details.
  25 *
  26 *	You should have received a copy of the GNU General Public License
  27 *	along with this program; if not, write to the Free Software
  28 *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29 *
  30 *****************************************************************************/
  31
  32/*
  33 *			    IMPORTANT NOTE
  34 *			    --------------
  35 *
  36 * As of kernel 2.5.20, this is the state of compliance and testing of
  37 * this driver (irda-usb) with regards to the USB low level drivers...
  38 *
  39 * This driver has been tested SUCCESSFULLY with the following drivers :
  40 *	o usb-uhci-hcd	(For Intel/Via USB controllers)
  41 *	o uhci-hcd	(Alternate/JE driver for Intel/Via USB controllers)
  42 *	o ohci-hcd	(For other USB controllers)
  43 *
  44 * This driver has NOT been tested with the following drivers :
  45 *	o ehci-hcd	(USB 2.0 controllers)
  46 *
  47 * Note that all HCD drivers do URB_ZERO_PACKET and timeout properly,
  48 * so we don't have to worry about that anymore.
  49 * One common problem is the failure to set the address on the dongle,
  50 * but this happens before the driver gets loaded...
  51 *
  52 * Jean II
  53 */
  54
  55/*------------------------------------------------------------------*/
  56
  57#include <linux/module.h>
  58#include <linux/moduleparam.h>
  59#include <linux/kernel.h>
  60#include <linux/types.h>
  61#include <linux/init.h>
  62#include <linux/skbuff.h>
  63#include <linux/netdevice.h>
  64#include <linux/slab.h>
  65#include <linux/rtnetlink.h>
  66#include <linux/usb.h>
  67#include <linux/firmware.h>
  68
  69#include "irda-usb.h"
  70
  71/*------------------------------------------------------------------*/
  72
  73static int qos_mtt_bits = 0;
  74
  75/* These are the currently known IrDA USB dongles. Add new dongles here */
  76static struct usb_device_id dongles[] = {
  77	/* ACTiSYS Corp.,  ACT-IR2000U FIR-USB Adapter */
  78	{ USB_DEVICE(0x9c4, 0x011), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  79	/* Look like ACTiSYS, Report : IBM Corp., IBM UltraPort IrDA */
  80	{ USB_DEVICE(0x4428, 0x012), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  81	/* KC Technology Inc.,  KC-180 USB IrDA Device */
  82	{ USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  83	/* Extended Systems, Inc.,  XTNDAccess IrDA USB (ESI-9685) */
  84	{ USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW },
  85	/* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */
  86	{ USB_DEVICE(0x66f, 0x4210), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  87	{ USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  88	{ USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR421X | IUC_SPEED_BUG },
  89	{ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
  90	  USB_DEVICE_ID_MATCH_INT_SUBCLASS,
  91	  .bInterfaceClass = USB_CLASS_APP_SPEC,
  92	  .bInterfaceSubClass = USB_CLASS_IRDA,
  93	  .driver_info = IUC_DEFAULT, },
  94	{ }, /* The end */
  95};
  96
  97/*
  98 * Important note :
  99 * Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed
 100 * using the "USB-IrDA specification" (yes, there exist such a thing), and
 101 * therefore not supported by this driver (don't add them above).
 102 * There is a Linux driver, stir4200, that support those USB devices.
 103 * Jean II
 104 */
 105
 106MODULE_DEVICE_TABLE(usb, dongles);
 107
 108/*------------------------------------------------------------------*/
 109
 110static void irda_usb_init_qos(struct irda_usb_cb *self) ;
 111static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf);
 112static void irda_usb_disconnect(struct usb_interface *intf);
 113static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self);
 114static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
 115					    struct net_device *dev);
 116static int irda_usb_open(struct irda_usb_cb *self);
 117static void irda_usb_close(struct irda_usb_cb *self);
 118static void speed_bulk_callback(struct urb *urb);
 119static void write_bulk_callback(struct urb *urb);
 120static void irda_usb_receive(struct urb *urb);
 121static void irda_usb_rx_defer_expired(unsigned long data);
 122static int irda_usb_net_open(struct net_device *dev);
 123static int irda_usb_net_close(struct net_device *dev);
 124static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 125static void irda_usb_net_timeout(struct net_device *dev);
 126
 127/************************ TRANSMIT ROUTINES ************************/
 128/*
 129 * Receive packets from the IrDA stack and send them on the USB pipe.
 130 * Handle speed change, timeout and lot's of ugliness...
 131 */
 132
 133/*------------------------------------------------------------------*/
 134/*
 135 * Function irda_usb_build_header(self, skb, header)
 136 *
 137 *   Builds USB-IrDA outbound header
 138 *
 139 * When we send an IrDA frame over an USB pipe, we add to it a 1 byte
 140 * header. This function create this header with the proper values.
 141 *
 142 * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2
 143 * that the setting of the link speed and xbof number in this outbound header
 144 * should be applied *AFTER* the frame has been sent.
 145 * Unfortunately, some devices are not compliant with that... It seems that
 146 * reading the spec is far too difficult...
 147 * Jean II
 148 */
 149static void irda_usb_build_header(struct irda_usb_cb *self,
 150				  __u8 *header,
 151				  int	force)
 152{
 153	/* Here we check if we have an STIR421x chip,
 154	 * and if either speed or xbofs (or both) needs
 155	 * to be changed.
 156	 */
 157	if (self->capability & IUC_STIR421X &&
 158	    ((self->new_speed != -1) || (self->new_xbofs != -1))) {
 159
 160		/* With STIR421x, speed and xBOFs must be set at the same
 161		 * time, even if only one of them changes.
 162		 */
 163		if (self->new_speed == -1)
 164			self->new_speed = self->speed ;
 165
 166		if (self->new_xbofs == -1)
 167			self->new_xbofs = self->xbofs ;
 168	}
 169
 170	/* Set the link speed */
 171	if (self->new_speed != -1) {
 172		/* Hum... Ugly hack :-(
 173		 * Some device are not compliant with the spec and change
 174		 * parameters *before* sending the frame. - Jean II
 175		 */
 176		if ((self->capability & IUC_SPEED_BUG) &&
 177		    (!force) && (self->speed != -1)) {
 178			/* No speed and xbofs change here
 179			 * (we'll do it later in the write callback) */
 180			IRDA_DEBUG(2, "%s(), not changing speed yet\n", __func__);
 181			*header = 0;
 182			return;
 183		}
 184
 185		IRDA_DEBUG(2, "%s(), changing speed to %d\n", __func__, self->new_speed);
 186		self->speed = self->new_speed;
 187		/* We will do ` self->new_speed = -1; ' in the completion
 188		 * handler just in case the current URB fail - Jean II */
 189
 190		switch (self->speed) {
 191		case 2400:
 192		        *header = SPEED_2400;
 193			break;
 194		default:
 195		case 9600:
 196			*header = SPEED_9600;
 197			break;
 198		case 19200:
 199			*header = SPEED_19200;
 200			break;
 201		case 38400:
 202			*header = SPEED_38400;
 203			break;
 204		case 57600:
 205		        *header = SPEED_57600;
 206			break;
 207		case 115200:
 208		        *header = SPEED_115200;
 209			break;
 210		case 576000:
 211		        *header = SPEED_576000;
 212			break;
 213		case 1152000:
 214		        *header = SPEED_1152000;
 215			break;
 216		case 4000000:
 217		        *header = SPEED_4000000;
 218			self->new_xbofs = 0;
 219			break;
 220		case 16000000:
 221			*header = SPEED_16000000;
 222  			self->new_xbofs = 0;
 223  			break;
 224  		}
 225	} else
 226		/* No change */
 227		*header = 0;
 228	
 229	/* Set the negotiated additional XBOFS */
 230	if (self->new_xbofs != -1) {
 231		IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __func__, self->new_xbofs);
 232		self->xbofs = self->new_xbofs;
 233		/* We will do ` self->new_xbofs = -1; ' in the completion
 234		 * handler just in case the current URB fail - Jean II */
 235
 236		switch (self->xbofs) {
 237		case 48:
 238			*header |= 0x10;
 239			break;
 240		case 28:
 241		case 24:	/* USB spec 1.0 says 24 */
 242			*header |= 0x20;
 243			break;
 244		default:
 245		case 12:
 246			*header |= 0x30;
 247			break;
 248		case 5: /* Bug in IrLAP spec? (should be 6) */
 249		case 6:
 250			*header |= 0x40;
 251			break;
 252		case 3:
 253			*header |= 0x50;
 254			break;
 255		case 2:
 256			*header |= 0x60;
 257			break;
 258		case 1:
 259			*header |= 0x70;
 260			break;
 261		case 0:
 262			*header |= 0x80;
 263			break;
 264		}
 265	}
 266}
 267
 268/*
 269*   calculate turnaround time for SigmaTel header
 270*/
 271static __u8 get_turnaround_time(struct sk_buff *skb)
 272{
 273	int turnaround_time = irda_get_mtt(skb);
 274
 275	if ( turnaround_time == 0 )
 276		return 0;
 277	else if ( turnaround_time <= 10 )
 278		return 1;
 279	else if ( turnaround_time <= 50 )
 280		return 2;
 281	else if ( turnaround_time <= 100 )
 282		return 3;
 283	else if ( turnaround_time <= 500 )
 284		return 4;
 285	else if ( turnaround_time <= 1000 )
 286		return 5;
 287	else if ( turnaround_time <= 5000 )
 288		return 6;
 289	else
 290		return 7;
 291}
 292
 293
 294/*------------------------------------------------------------------*/
 295/*
 296 * Send a command to change the speed of the dongle
 297 * Need to be called with spinlock on.
 298 */
 299static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
 300{
 301	__u8 *frame;
 302	struct urb *urb;
 303	int ret;
 304
 305	IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __func__,
 306		   self->new_speed, self->new_xbofs);
 307
 308	/* Grab the speed URB */
 309	urb = self->speed_urb;
 310	if (urb->status != 0) {
 311		IRDA_WARNING("%s(), URB still in use!\n", __func__);
 312		return;
 313	}
 314
 315	/* Allocate the fake frame */
 316	frame = self->speed_buff;
 317
 318	/* Set the new speed and xbofs in this fake frame */
 319	irda_usb_build_header(self, frame, 1);
 320
 321	if (self->capability & IUC_STIR421X) {
 322		if (frame[0] == 0) return ; // do nothing if no change
 323		frame[1] = 0; // other parameters don't change here
 324		frame[2] = 0;
 325	}
 326
 327	/* Submit the 0 length IrDA frame to trigger new speed settings */
 328        usb_fill_bulk_urb(urb, self->usbdev,
 329		      usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
 330                      frame, IRDA_USB_SPEED_MTU,
 331                      speed_bulk_callback, self);
 332	urb->transfer_buffer_length = self->header_length;
 333	urb->transfer_flags = 0;
 334
 335	/* Irq disabled -> GFP_ATOMIC */
 336	if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
 337		IRDA_WARNING("%s(), failed Speed URB\n", __func__);
 338	}
 339}
 340
 341/*------------------------------------------------------------------*/
 342/*
 343 * Speed URB callback
 344 * Now, we can only get called for the speed URB.
 345 */
 346static void speed_bulk_callback(struct urb *urb)
 347{
 348	struct irda_usb_cb *self = urb->context;
 349	
 350	IRDA_DEBUG(2, "%s()\n", __func__);
 351
 352	/* We should always have a context */
 353	IRDA_ASSERT(self != NULL, return;);
 354	/* We should always be called for the speed URB */
 355	IRDA_ASSERT(urb == self->speed_urb, return;);
 356
 357	/* Check for timeout and other USB nasties */
 358	if (urb->status != 0) {
 359		/* I get a lot of -ECONNABORTED = -103 here - Jean II */
 360		IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __func__, urb->status, urb->transfer_flags);
 361
 362		/* Don't do anything here, that might confuse the USB layer.
 363		 * Instead, we will wait for irda_usb_net_timeout(), the
 364		 * network layer watchdog, to fix the situation.
 365		 * Jean II */
 366		/* A reset of the dongle might be welcomed here - Jean II */
 367		return;
 368	}
 369
 370	/* urb is now available */
 371	//urb->status = 0; -> tested above
 372
 373	/* New speed and xbof is now committed in hardware */
 374	self->new_speed = -1;
 375	self->new_xbofs = -1;
 376
 377	/* Allow the stack to send more packets */
 378	netif_wake_queue(self->netdev);
 379}
 380
 381/*------------------------------------------------------------------*/
 382/*
 383 * Send an IrDA frame to the USB dongle (for transmission)
 384 */
 385static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
 386					    struct net_device *netdev)
 387{
 388	struct irda_usb_cb *self = netdev_priv(netdev);
 389	struct urb *urb = self->tx_urb;
 390	unsigned long flags;
 391	s32 speed;
 392	s16 xbofs;
 393	int res, mtt;
 394
 395	IRDA_DEBUG(4, "%s() on %s\n", __func__, netdev->name);
 396
 397	netif_stop_queue(netdev);
 398
 399	/* Protect us from USB callbacks, net watchdog and else. */
 400	spin_lock_irqsave(&self->lock, flags);
 401
 402	/* Check if the device is still there.
 403	 * We need to check self->present under the spinlock because
 404	 * of irda_usb_disconnect() is synchronous - Jean II */
 405	if (!self->present) {
 406		IRDA_DEBUG(0, "%s(), Device is gone...\n", __func__);
 407		goto drop;
 408	}
 409
 410	/* Check if we need to change the number of xbofs */
 411        xbofs = irda_get_next_xbofs(skb);
 412        if ((xbofs != self->xbofs) && (xbofs != -1)) {
 413		self->new_xbofs = xbofs;
 414	}
 415
 416        /* Check if we need to change the speed */
 417	speed = irda_get_next_speed(skb);
 418	if ((speed != self->speed) && (speed != -1)) {
 419		/* Set the desired speed */
 420		self->new_speed = speed;
 421
 422		/* Check for empty frame */
 423		if (!skb->len) {
 424			/* IrLAP send us an empty frame to make us change the
 425			 * speed. Changing speed with the USB adapter is in
 426			 * fact sending an empty frame to the adapter, so we
 427			 * could just let the present function do its job.
 428			 * However, we would wait for min turn time,
 429			 * do an extra memcpy and increment packet counters...
 430			 * Jean II */
 431			irda_usb_change_speed_xbofs(self);
 432			netdev->trans_start = jiffies;
 433			/* Will netif_wake_queue() in callback */
 434			goto drop;
 435		}
 436	}
 437
 438	if (urb->status != 0) {
 439		IRDA_WARNING("%s(), URB still in use!\n", __func__);
 440		goto drop;
 441	}
 442
 443	skb_copy_from_linear_data(skb, self->tx_buff + self->header_length, skb->len);
 444
 445	/* Change setting for next frame */
 446	if (self->capability & IUC_STIR421X) {
 447		__u8 turnaround_time;
 448		__u8* frame = self->tx_buff;
 449		turnaround_time = get_turnaround_time( skb );
 450		irda_usb_build_header(self, frame, 0);
 451		frame[2] = turnaround_time;
 452		if ((skb->len != 0) &&
 453		    ((skb->len % 128) == 0) &&
 454		    ((skb->len % 512) != 0)) {
 455			/* add extra byte for special SigmaTel feature */
 456			frame[1] = 1;
 457			skb_put(skb, 1);
 458		} else {
 459			frame[1] = 0;
 460		}
 461	} else {
 462		irda_usb_build_header(self, self->tx_buff, 0);
 463	}
 464
 465	/* FIXME: Make macro out of this one */
 466	((struct irda_skb_cb *)skb->cb)->context = self;
 467
 468	usb_fill_bulk_urb(urb, self->usbdev,
 469		      usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
 470                      self->tx_buff, skb->len + self->header_length,
 471                      write_bulk_callback, skb);
 472
 473	/* This flag (URB_ZERO_PACKET) indicates that what we send is not
 474	 * a continuous stream of data but separate packets.
 475	 * In this case, the USB layer will insert an empty USB frame (TD)
 476	 * after each of our packets that is exact multiple of the frame size.
 477	 * This is how the dongle will detect the end of packet - Jean II */
 478	urb->transfer_flags = URB_ZERO_PACKET;
 479
 480	/* Generate min turn time. FIXME: can we do better than this? */
 481	/* Trying to a turnaround time at this level is trying to measure
 482	 * processor clock cycle with a wrist-watch, approximate at best...
 483	 *
 484	 * What we know is the last time we received a frame over USB.
 485	 * Due to latency over USB that depend on the USB load, we don't
 486	 * know when this frame was received over IrDA (a few ms before ?)
 487	 * Then, same story for our outgoing frame...
 488	 *
 489	 * In theory, the USB dongle is supposed to handle the turnaround
 490	 * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's
 491	 * why this code is enabled only for dongles that doesn't meet
 492	 * the spec.
 493	 * Jean II */
 494	if (self->capability & IUC_NO_TURN) {
 495		mtt = irda_get_mtt(skb);
 496		if (mtt) {
 497			int diff;
 498			do_gettimeofday(&self->now);
 499			diff = self->now.tv_usec - self->stamp.tv_usec;
 500#ifdef IU_USB_MIN_RTT
 501			/* Factor in USB delays -> Get rid of udelay() that
 502			 * would be lost in the noise - Jean II */
 503			diff += IU_USB_MIN_RTT;
 504#endif /* IU_USB_MIN_RTT */
 505			/* If the usec counter did wraparound, the diff will
 506			 * go negative (tv_usec is a long), so we need to
 507			 * correct it by one second. Jean II */
 508			if (diff < 0)
 509				diff += 1000000;
 510
 511		        /* Check if the mtt is larger than the time we have
 512			 * already used by all the protocol processing
 513			 */
 514			if (mtt > diff) {
 515				mtt -= diff;
 516				if (mtt > 1000)
 517					mdelay(mtt/1000);
 518				else
 519					udelay(mtt);
 520			}
 521		}
 522	}
 523	
 524	/* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
 525	if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
 526		IRDA_WARNING("%s(), failed Tx URB\n", __func__);
 527		netdev->stats.tx_errors++;
 528		/* Let USB recover : We will catch that in the watchdog */
 529		/*netif_start_queue(netdev);*/
 530	} else {
 531		/* Increment packet stats */
 532		netdev->stats.tx_packets++;
 533                netdev->stats.tx_bytes += skb->len;
 534		
 535		netdev->trans_start = jiffies;
 536	}
 537	spin_unlock_irqrestore(&self->lock, flags);
 538	
 539	return NETDEV_TX_OK;
 540
 541drop:
 542	/* Drop silently the skb and exit */
 543	dev_kfree_skb(skb);
 544	spin_unlock_irqrestore(&self->lock, flags);
 545	return NETDEV_TX_OK;
 546}
 547
 548/*------------------------------------------------------------------*/
 549/*
 550 * Note : this function will be called only for tx_urb...
 551 */
 552static void write_bulk_callback(struct urb *urb)
 553{
 554	unsigned long flags;
 555	struct sk_buff *skb = urb->context;
 556	struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
 557	
 558	IRDA_DEBUG(2, "%s()\n", __func__);
 559
 560	/* We should always have a context */
 561	IRDA_ASSERT(self != NULL, return;);
 562	/* We should always be called for the speed URB */
 563	IRDA_ASSERT(urb == self->tx_urb, return;);
 564
 565	/* Free up the skb */
 566	dev_kfree_skb_any(skb);
 567	urb->context = NULL;
 568
 569	/* Check for timeout and other USB nasties */
 570	if (urb->status != 0) {
 571		/* I get a lot of -ECONNABORTED = -103 here - Jean II */
 572		IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __func__, urb->status, urb->transfer_flags);
 573
 574		/* Don't do anything here, that might confuse the USB layer,
 575		 * and we could go in recursion and blow the kernel stack...
 576		 * Instead, we will wait for irda_usb_net_timeout(), the
 577		 * network layer watchdog, to fix the situation.
 578		 * Jean II */
 579		/* A reset of the dongle might be welcomed here - Jean II */
 580		return;
 581	}
 582
 583	/* urb is now available */
 584	//urb->status = 0; -> tested above
 585
 586	/* Make sure we read self->present properly */
 587	spin_lock_irqsave(&self->lock, flags);
 588
 589	/* If the network is closed, stop everything */
 590	if ((!self->netopen) || (!self->present)) {
 591		IRDA_DEBUG(0, "%s(), Network is gone...\n", __func__);
 592		spin_unlock_irqrestore(&self->lock, flags);
 593		return;
 594	}
 595
 596	/* If changes to speed or xbofs is pending... */
 597	if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
 598		if ((self->new_speed != self->speed) ||
 599		    (self->new_xbofs != self->xbofs)) {
 600			/* We haven't changed speed yet (because of
 601			 * IUC_SPEED_BUG), so do it now - Jean II */
 602			IRDA_DEBUG(1, "%s(), Changing speed now...\n", __func__);
 603			irda_usb_change_speed_xbofs(self);
 604		} else {
 605			/* New speed and xbof is now committed in hardware */
 606			self->new_speed = -1;
 607			self->new_xbofs = -1;
 608			/* Done, waiting for next packet */
 609			netif_wake_queue(self->netdev);
 610		}
 611	} else {
 612		/* Otherwise, allow the stack to send more packets */
 613		netif_wake_queue(self->netdev);
 614	}
 615	spin_unlock_irqrestore(&self->lock, flags);
 616}
 617
 618/*------------------------------------------------------------------*/
 619/*
 620 * Watchdog timer from the network layer.
 621 * After a predetermined timeout, if we don't give confirmation that
 622 * the packet has been sent (i.e. no call to netif_wake_queue()),
 623 * the network layer will call this function.
 624 * Note that URB that we submit have also a timeout. When the URB timeout
 625 * expire, the normal URB callback is called (write_bulk_callback()).
 626 */
 627static void irda_usb_net_timeout(struct net_device *netdev)
 628{
 629	unsigned long flags;
 630	struct irda_usb_cb *self = netdev_priv(netdev);
 631	struct urb *urb;
 632	int	done = 0;	/* If we have made any progress */
 633
 634	IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __func__);
 635	IRDA_ASSERT(self != NULL, return;);
 636
 637	/* Protect us from USB callbacks, net Tx and else. */
 638	spin_lock_irqsave(&self->lock, flags);
 639
 640	/* self->present *MUST* be read under spinlock */
 641	if (!self->present) {
 642		IRDA_WARNING("%s(), device not present!\n", __func__);
 643		netif_stop_queue(netdev);
 644		spin_unlock_irqrestore(&self->lock, flags);
 645		return;
 646	}
 647
 648	/* Check speed URB */
 649	urb = self->speed_urb;
 650	if (urb->status != 0) {
 651		IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
 652
 653		switch (urb->status) {
 654		case -EINPROGRESS:
 655			usb_unlink_urb(urb);
 656			/* Note : above will  *NOT* call netif_wake_queue()
 657			 * in completion handler, we will come back here.
 658			 * Jean II */
 659			done = 1;
 660			break;
 661		case -ECONNRESET:
 662		case -ENOENT:			/* urb unlinked by us */
 663		default:			/* ??? - Play safe */
 664			urb->status = 0;
 665			netif_wake_queue(self->netdev);
 666			done = 1;
 667			break;
 668		}
 669	}
 670
 671	/* Check Tx URB */
 672	urb = self->tx_urb;
 673	if (urb->status != 0) {
 674		struct sk_buff *skb = urb->context;
 675
 676		IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
 677
 678		/* Increase error count */
 679		netdev->stats.tx_errors++;
 680
 681#ifdef IU_BUG_KICK_TIMEOUT
 682		/* Can't be a bad idea to reset the speed ;-) - Jean II */
 683		if(self->new_speed == -1)
 684			self->new_speed = self->speed;
 685		if(self->new_xbofs == -1)
 686			self->new_xbofs = self->xbofs;
 687		irda_usb_change_speed_xbofs(self);
 688#endif /* IU_BUG_KICK_TIMEOUT */
 689
 690		switch (urb->status) {
 691		case -EINPROGRESS:
 692			usb_unlink_urb(urb);
 693			/* Note : above will  *NOT* call netif_wake_queue()
 694			 * in completion handler, because urb->status will
 695			 * be -ENOENT. We will fix that at the next watchdog,
 696			 * leaving more time to USB to recover...
 697			 * Jean II */
 698			done = 1;
 699			break;
 700		case -ECONNRESET:
 701		case -ENOENT:			/* urb unlinked by us */
 702		default:			/* ??? - Play safe */
 703			if(skb != NULL) {
 704				dev_kfree_skb_any(skb);
 705				urb->context = NULL;
 706			}
 707			urb->status = 0;
 708			netif_wake_queue(self->netdev);
 709			done = 1;
 710			break;
 711		}
 712	}
 713	spin_unlock_irqrestore(&self->lock, flags);
 714
 715	/* Maybe we need a reset */
 716	/* Note : Some drivers seem to use a usb_set_interface() when they
 717	 * need to reset the hardware. Hum...
 718	 */
 719
 720	/* if(done == 0) */
 721}
 722
 723/************************* RECEIVE ROUTINES *************************/
 724/*
 725 * Receive packets from the USB layer stack and pass them to the IrDA stack.
 726 * Try to work around USB failures...
 727 */
 728
 729/*
 730 * Note :
 731 * Some of you may have noticed that most dongle have an interrupt in pipe
 732 * that we don't use. Here is the little secret...
 733 * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
 734 * in every USB frame. This is unnecessary overhead.
 735 * The interrupt in pipe will generate an event every time a packet is
 736 * received. Reading an interrupt pipe adds minimal overhead, but has some
 737 * latency (~1ms).
 738 * If we are connected (speed != 9600), we want to minimise latency, so
 739 * we just always hang the Rx URB and ignore the interrupt.
 740 * If we are not connected (speed == 9600), there is usually no Rx traffic,
 741 * and we want to minimise the USB overhead. In this case we should wait
 742 * on the interrupt pipe and hang the Rx URB only when an interrupt is
 743 * received.
 744 * Jean II
 745 *
 746 * Note : don't read the above as what we are currently doing, but as
 747 * something we could do with KC dongle. Also don't forget that the
 748 * interrupt pipe is not part of the original standard, so this would
 749 * need to be optional...
 750 * Jean II
 751 */
 752
 753/*------------------------------------------------------------------*/
 754/*
 755 * Submit a Rx URB to the USB layer to handle reception of a frame
 756 * Mostly called by the completion callback of the previous URB.
 757 *
 758 * Jean II
 759 */
 760static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
 761{
 762	struct irda_skb_cb *cb;
 763	int ret;
 764
 765	IRDA_DEBUG(2, "%s()\n", __func__);
 766
 767	/* This should never happen */
 768	IRDA_ASSERT(skb != NULL, return;);
 769	IRDA_ASSERT(urb != NULL, return;);
 770
 771	/* Save ourselves in the skb */
 772	cb = (struct irda_skb_cb *) skb->cb;
 773	cb->context = self;
 774
 775	/* Reinitialize URB */
 776	usb_fill_bulk_urb(urb, self->usbdev, 
 777		      usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep), 
 778		      skb->data, IRDA_SKB_MAX_MTU,
 779                      irda_usb_receive, skb);
 780	urb->status = 0;
 781
 782	/* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
 783	ret = usb_submit_urb(urb, GFP_ATOMIC);
 784	if (ret) {
 785		/* If this ever happen, we are in deep s***.
 786		 * Basically, the Rx path will stop... */
 787		IRDA_WARNING("%s(), Failed to submit Rx URB %d\n",
 788			     __func__, ret);
 789	}
 790}
 791
 792/*------------------------------------------------------------------*/
 793/*
 794 * Function irda_usb_receive(urb)
 795 *
 796 *     Called by the USB subsystem when a frame has been received
 797 *
 798 */
 799static void irda_usb_receive(struct urb *urb)
 800{
 801	struct sk_buff *skb = (struct sk_buff *) urb->context;
 802	struct irda_usb_cb *self; 
 803	struct irda_skb_cb *cb;
 804	struct sk_buff *newskb;
 805	struct sk_buff *dataskb;
 806	struct urb *next_urb;
 807	unsigned int len, docopy;
 808
 809	IRDA_DEBUG(2, "%s(), len=%d\n", __func__, urb->actual_length);
 810	
 811	/* Find ourselves */
 812	cb = (struct irda_skb_cb *) skb->cb;
 813	IRDA_ASSERT(cb != NULL, return;);
 814	self = (struct irda_usb_cb *) cb->context;
 815	IRDA_ASSERT(self != NULL, return;);
 816
 817	/* If the network is closed or the device gone, stop everything */
 818	if ((!self->netopen) || (!self->present)) {
 819		IRDA_DEBUG(0, "%s(), Network is gone!\n", __func__);
 820		/* Don't re-submit the URB : will stall the Rx path */
 821		return;
 822	}
 823	
 824	/* Check the status */
 825	if (urb->status != 0) {
 826		switch (urb->status) {
 827		case -EILSEQ:
 828			self->netdev->stats.rx_crc_errors++;
 829			/* Also precursor to a hot-unplug on UHCI. */
 830			/* Fallthrough... */
 831		case -ECONNRESET:
 832			/* Random error, if I remember correctly */
 833			/* uhci_cleanup_unlink() is going to kill the Rx
 834			 * URB just after we return. No problem, at this
 835			 * point the URB will be idle ;-) - Jean II */
 836		case -ESHUTDOWN:
 837			/* That's usually a hot-unplug. Submit will fail... */
 838		case -ETIME:
 839			/* Usually precursor to a hot-unplug on OHCI. */
 840		default:
 841			self->netdev->stats.rx_errors++;
 842			IRDA_DEBUG(0, "%s(), RX status %d, transfer_flags 0x%04X\n", __func__, urb->status, urb->transfer_flags);
 843			break;
 844		}
 845		/* If we received an error, we don't want to resubmit the
 846		 * Rx URB straight away but to give the USB layer a little
 847		 * bit of breathing room.
 848		 * We are in the USB thread context, therefore there is a
 849		 * danger of recursion (new URB we submit fails, we come
 850		 * back here).
 851		 * With recent USB stack (2.6.15+), I'm seeing that on
 852		 * hot unplug of the dongle...
 853		 * Lowest effective timer is 10ms...
 854		 * Jean II */
 855		self->rx_defer_timer.function = irda_usb_rx_defer_expired;
 856		self->rx_defer_timer.data = (unsigned long) urb;
 857		mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000));
 858		return;
 859	}
 860	
 861	/* Check for empty frames */
 862	if (urb->actual_length <= self->header_length) {
 863		IRDA_WARNING("%s(), empty frame!\n", __func__);
 864		goto done;
 865	}
 866
 867	/*  
 868	 * Remember the time we received this frame, so we can
 869	 * reduce the min turn time a bit since we will know
 870	 * how much time we have used for protocol processing
 871	 */
 872        do_gettimeofday(&self->stamp);
 873
 874	/* Check if we need to copy the data to a new skb or not.
 875	 * For most frames, we use ZeroCopy and pass the already
 876	 * allocated skb up the stack.
 877	 * If the frame is small, it is more efficient to copy it
 878	 * to save memory (copy will be fast anyway - that's
 879	 * called Rx-copy-break). Jean II */
 880	docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
 881
 882	/* Allocate a new skb */
 883	if (self->capability & IUC_STIR421X)
 884		newskb = dev_alloc_skb(docopy ? urb->actual_length :
 885				       IRDA_SKB_MAX_MTU +
 886				       USB_IRDA_STIR421X_HEADER);
 887	else
 888		newskb = dev_alloc_skb(docopy ? urb->actual_length :
 889				       IRDA_SKB_MAX_MTU);
 890
 891	if (!newskb)  {
 892		self->netdev->stats.rx_dropped++;
 893		/* We could deliver the current skb, but this would stall
 894		 * the Rx path. Better drop the packet... Jean II */
 895		goto done;  
 896	}
 897
 898	/* Make sure IP header get aligned (IrDA header is 5 bytes) */
 899	/* But IrDA-USB header is 1 byte. Jean II */
 900	//skb_reserve(newskb, USB_IRDA_HEADER - 1);
 901
 902	if(docopy) {
 903		/* Copy packet, so we can recycle the original */
 904		skb_copy_from_linear_data(skb, newskb->data, urb->actual_length);
 905		/* Deliver this new skb */
 906		dataskb = newskb;
 907		/* And hook the old skb to the URB
 908		 * Note : we don't need to "clean up" the old skb,
 909		 * as we never touched it. Jean II */
 910	} else {
 911		/* We are using ZeroCopy. Deliver old skb */
 912		dataskb = skb;
 913		/* And hook the new skb to the URB */
 914		skb = newskb;
 915	}
 916
 917	/* Set proper length on skb & remove USB-IrDA header */
 918	skb_put(dataskb, urb->actual_length);
 919	skb_pull(dataskb, self->header_length);
 920
 921	/* Ask the networking layer to queue the packet for the IrDA stack */
 922	dataskb->dev = self->netdev;
 923	skb_reset_mac_header(dataskb);
 924	dataskb->protocol = htons(ETH_P_IRDA);
 925	len = dataskb->len;
 926	netif_rx(dataskb);
 927
 928	/* Keep stats up to date */
 929	self->netdev->stats.rx_bytes += len;
 930	self->netdev->stats.rx_packets++;
 931
 932done:
 933	/* Note : at this point, the URB we've just received (urb)
 934	 * is still referenced by the USB layer. For example, if we
 935	 * have received a -ECONNRESET, uhci_cleanup_unlink() will
 936	 * continue to process it (in fact, cleaning it up).
 937	 * If we were to submit this URB, disaster would ensue.
 938	 * Therefore, we submit our idle URB, and put this URB in our
 939	 * idle slot....
 940	 * Jean II */
 941	/* Note : with this scheme, we could submit the idle URB before
 942	 * processing the Rx URB. I don't think it would buy us anything as
 943	 * we are running in the USB thread context. Jean II */
 944	next_urb = self->idle_rx_urb;
 945
 946	/* Recycle Rx URB : Now, the idle URB is the present one */
 947	urb->context = NULL;
 948	self->idle_rx_urb = urb;
 949
 950	/* Submit the idle URB to replace the URB we've just received.
 951	 * Do it last to avoid race conditions... Jean II */
 952	irda_usb_submit(self, skb, next_urb);
 953}
 954
 955/*------------------------------------------------------------------*/
 956/*
 957 * In case of errors, we want the USB layer to have time to recover.
 958 * Now, it is time to resubmit ouur Rx URB...
 959 */
 960static void irda_usb_rx_defer_expired(unsigned long data)
 961{
 962	struct urb *urb = (struct urb *) data;
 963	struct sk_buff *skb = (struct sk_buff *) urb->context;
 964	struct irda_usb_cb *self; 
 965	struct irda_skb_cb *cb;
 966	struct urb *next_urb;
 967
 968	IRDA_DEBUG(2, "%s()\n", __func__);
 969
 970	/* Find ourselves */
 971	cb = (struct irda_skb_cb *) skb->cb;
 972	IRDA_ASSERT(cb != NULL, return;);
 973	self = (struct irda_usb_cb *) cb->context;
 974	IRDA_ASSERT(self != NULL, return;);
 975
 976	/* Same stuff as when Rx is done, see above... */
 977	next_urb = self->idle_rx_urb;
 978	urb->context = NULL;
 979	self->idle_rx_urb = urb;
 980	irda_usb_submit(self, skb, next_urb);
 981}
 982
 983/*------------------------------------------------------------------*/
 984/*
 985 * Callbak from IrDA layer. IrDA wants to know if we have
 986 * started receiving anything.
 987 */
 988static int irda_usb_is_receiving(struct irda_usb_cb *self)
 989{
 990	/* Note : because of the way UHCI works, it's almost impossible
 991	 * to get this info. The Controller DMA directly to memory and
 992	 * signal only when the whole frame is finished. To know if the
 993	 * first TD of the URB has been filled or not seems hard work...
 994	 *
 995	 * The other solution would be to use the "receiving" command
 996	 * on the default decriptor with a usb_control_msg(), but that
 997	 * would add USB traffic and would return result only in the
 998	 * next USB frame (~1ms).
 999	 *
1000	 * I've been told that current dongles send status info on their
1001	 * interrupt endpoint, and that's what the Windows driver uses
1002	 * to know this info. Unfortunately, this is not yet in the spec...
1003	 *
1004	 * Jean II
1005	 */
1006
1007	return 0; /* For now */
1008}
1009
1010#define STIR421X_PATCH_PRODUCT_VER     "Product Version: "
1011#define STIR421X_PATCH_STMP_TAG        "STMP"
1012#define STIR421X_PATCH_CODE_OFFSET     512 /* patch image starts before here */
1013/* marks end of patch file header (PC DOS text file EOF character) */
1014#define STIR421X_PATCH_END_OF_HDR_TAG  0x1A
1015#define STIR421X_PATCH_BLOCK_SIZE      1023
1016
1017/*
1018 * Function stir421x_fwupload (struct irda_usb_cb *self,
1019 *                             unsigned char *patch,
1020 *                             const unsigned int patch_len)
1021 *
1022 *   Upload firmware code to SigmaTel 421X IRDA-USB dongle
1023 */
1024static int stir421x_fw_upload(struct irda_usb_cb *self,
1025			     const unsigned char *patch,
1026			     const unsigned int patch_len)
1027{
1028        int ret = -ENOMEM;
1029        int actual_len = 0;
1030        unsigned int i;
1031        unsigned int block_size = 0;
1032        unsigned char *patch_block;
1033
1034        patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL);
1035	if (patch_block == NULL)
1036		return -ENOMEM;
1037
1038	/* break up patch into 1023-byte sections */
1039	for (i = 0; i < patch_len; i += block_size) {
1040		block_size = patch_len - i;
1041
1042		if (block_size > STIR421X_PATCH_BLOCK_SIZE)
1043			block_size = STIR421X_PATCH_BLOCK_SIZE;
1044
1045		/* upload the patch section */
1046		memcpy(patch_block, patch + i, block_size);
1047
1048		ret = usb_bulk_msg(self->usbdev,
1049				   usb_sndbulkpipe(self->usbdev,
1050						   self->bulk_out_ep),
1051				   patch_block, block_size,
1052				   &actual_len, msecs_to_jiffies(500));
1053		IRDA_DEBUG(3,"%s(): Bulk send %u bytes, ret=%d\n",
1054			   __func__, actual_len, ret);
1055
1056		if (ret < 0)
1057			break;
1058
1059		mdelay(10);
1060	}
1061
1062	kfree(patch_block);
1063
1064        return ret;
1065 }
1066
1067/*
1068 * Function stir421x_patch_device(struct irda_usb_cb *self)
1069 *
1070 * Get a firmware code from userspase using hotplug request_firmware() call
1071  */
1072static int stir421x_patch_device(struct irda_usb_cb *self)
1073{
1074	unsigned int i;
1075	int ret;
1076	char stir421x_fw_name[12];
1077	const struct firmware *fw;
1078	const unsigned char *fw_version_ptr; /* pointer to version string */
1079	unsigned long fw_version = 0;
1080
1081        /*
1082         * Known firmware patch file names for STIR421x dongles
1083         * are "42101001.sb" or "42101002.sb"
1084         */
1085        sprintf(stir421x_fw_name, "4210%4X.sb",
1086                self->usbdev->descriptor.bcdDevice);
1087        ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
1088        if (ret < 0)
1089                return ret;
1090
1091        /* We get a patch from userspace */
1092        IRDA_MESSAGE("%s(): Received firmware %s (%zu bytes)\n",
1093                     __func__, stir421x_fw_name, fw->size);
1094
1095        ret = -EINVAL;
1096
1097	/* Get the bcd product version */
1098        if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
1099                    sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
1100                fw_version_ptr = fw->data +
1101			sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
1102
1103                /* Let's check if the product version is dotted */
1104                if (fw_version_ptr[3] == '.' &&
1105		    fw_version_ptr[7] == '.') {
1106			unsigned long major, minor, build;
1107			major = simple_strtoul(fw_version_ptr, NULL, 10);
1108			minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
1109			build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
1110
1111			fw_version = (major << 12)
1112				+ (minor << 8)
1113				+ ((build / 10) << 4)
1114				+ (build % 10);
1115
1116			IRDA_DEBUG(3, "%s(): Firmware Product version %ld\n",
1117                                   __func__, fw_version);
1118                }
1119        }
1120
1121        if (self->usbdev->descriptor.bcdDevice == cpu_to_le16(fw_version)) {
1122                /*
1123		 * If we're here, we've found a correct patch
1124                 * The actual image starts after the "STMP" keyword
1125                 * so forward to the firmware header tag
1126                 */
1127                for (i = 0; i < fw->size && fw->data[i] !=
1128			     STIR421X_PATCH_END_OF_HDR_TAG; i++) ;
1129                /* here we check for the out of buffer case */
1130                if (i < STIR421X_PATCH_CODE_OFFSET && i < fw->size &&
1131				STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) {
1132                        if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
1133                                    sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
1134
1135				/* We can upload the patch to the target */
1136				i += sizeof(STIR421X_PATCH_STMP_TAG);
1137                                ret = stir421x_fw_upload(self, &fw->data[i],
1138							 fw->size - i);
1139                        }
1140                }
1141        }
1142
1143        release_firmware(fw);
1144
1145        return ret;
1146}
1147
1148
1149/********************** IRDA DEVICE CALLBACKS **********************/
1150/*
1151 * Main calls from the IrDA/Network subsystem.
1152 * Mostly registering a new irda-usb device and removing it....
1153 * We only deal with the IrDA side of the business, the USB side will
1154 * be dealt with below...
1155 */
1156
1157
1158/*------------------------------------------------------------------*/
1159/*
1160 * Function irda_usb_net_open (dev)
1161 *
1162 *    Network device is taken up. Usually this is done by "ifconfig irda0 up" 
1163 *   
1164 * Note : don't mess with self->netopen - Jean II
1165 */
1166static int irda_usb_net_open(struct net_device *netdev)
1167{
1168	struct irda_usb_cb *self;
1169	unsigned long flags;
1170	char	hwname[16];
1171	int i;
1172	
1173	IRDA_DEBUG(1, "%s()\n", __func__);
1174
1175	IRDA_ASSERT(netdev != NULL, return -1;);
1176	self = netdev_priv(netdev);
1177	IRDA_ASSERT(self != NULL, return -1;);
1178
1179	spin_lock_irqsave(&self->lock, flags);
1180	/* Can only open the device if it's there */
1181	if(!self->present) {
1182		spin_unlock_irqrestore(&self->lock, flags);
1183		IRDA_WARNING("%s(), device not present!\n", __func__);
1184		return -1;
1185	}
1186
1187	if(self->needspatch) {
1188		spin_unlock_irqrestore(&self->lock, flags);
1189		IRDA_WARNING("%s(), device needs patch\n", __func__) ;
1190		return -EIO ;
1191	}
1192
1193	/* Initialise default speed and xbofs value
1194	 * (IrLAP will change that soon) */
1195	self->speed = -1;
1196	self->xbofs = -1;
1197	self->new_speed = -1;
1198	self->new_xbofs = -1;
1199
1200	/* To do *before* submitting Rx urbs and starting net Tx queue
1201	 * Jean II */
1202	self->netopen = 1;
1203	spin_unlock_irqrestore(&self->lock, flags);
1204
1205	/* 
1206	 * Now that everything should be initialized properly,
1207	 * Open new IrLAP layer instance to take care of us...
1208	 * Note : will send immediately a speed change...
1209	 */
1210	sprintf(hwname, "usb#%d", self->usbdev->devnum);
1211	self->irlap = irlap_open(netdev, &self->qos, hwname);
1212	IRDA_ASSERT(self->irlap != NULL, return -1;);
1213
1214	/* Allow IrLAP to send data to us */
1215	netif_start_queue(netdev);
1216
1217	/* We submit all the Rx URB except for one that we keep idle.
1218	 * Need to be initialised before submitting other USBs, because
1219	 * in some cases as soon as we submit the URBs the USB layer
1220	 * will trigger a dummy receive - Jean II */
1221	self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
1222	self->idle_rx_urb->context = NULL;
1223
1224	/* Now that we can pass data to IrLAP, allow the USB layer
1225	 * to send us some data... */
1226	for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
1227		struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
1228		if (!skb) {
1229			/* If this ever happen, we are in deep s***.
1230			 * Basically, we can't start the Rx path... */
1231			IRDA_WARNING("%s(), Failed to allocate Rx skb\n",
1232				     __func__);
1233			return -1;
1234		}
1235		//skb_reserve(newskb, USB_IRDA_HEADER - 1);
1236		irda_usb_submit(self, skb, self->rx_urb[i]);
1237	}
1238
1239	/* Ready to play !!! */
1240	return 0;
1241}
1242
1243/*------------------------------------------------------------------*/
1244/*
1245 * Function irda_usb_net_close (self)
1246 *
1247 *    Network device is taken down. Usually this is done by 
1248 *    "ifconfig irda0 down" 
1249 */
1250static int irda_usb_net_close(struct net_device *netdev)
1251{
1252	struct irda_usb_cb *self;
1253	int	i;
1254
1255	IRDA_DEBUG(1, "%s()\n", __func__);
1256
1257	IRDA_ASSERT(netdev != NULL, return -1;);
1258	self = netdev_priv(netdev);
1259	IRDA_ASSERT(self != NULL, return -1;);
1260
1261	/* Clear this flag *before* unlinking the urbs and *before*
1262	 * stopping the network Tx queue - Jean II */
1263	self->netopen = 0;
1264
1265	/* Stop network Tx queue */
1266	netif_stop_queue(netdev);
1267
1268	/* Kill defered Rx URB */
1269	del_timer(&self->rx_defer_timer);
1270
1271	/* Deallocate all the Rx path buffers (URBs and skb) */
1272	for (i = 0; i < self->max_rx_urb; i++) {
1273		struct urb *urb = self->rx_urb[i];
1274		struct sk_buff *skb = (struct sk_buff *) urb->context;
1275		/* Cancel the receive command */
1276		usb_kill_urb(urb);
1277		/* The skb is ours, free it */
1278		if(skb) {
1279			dev_kfree_skb(skb);
1280			urb->context = NULL;
1281		}
1282	}
1283	/* Cancel Tx and speed URB - need to be synchronous to avoid races */
1284	usb_kill_urb(self->tx_urb);
1285	usb_kill_urb(self->speed_urb);
1286
1287	/* Stop and remove instance of IrLAP */
1288	if (self->irlap)
1289		irlap_close(self->irlap);
1290	self->irlap = NULL;
1291
1292	return 0;
1293}
1294
1295/*------------------------------------------------------------------*/
1296/*
1297 * IOCTLs : Extra out-of-band network commands...
1298 */
1299static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1300{
1301	unsigned long flags;
1302	struct if_irda_req *irq = (struct if_irda_req *) rq;
1303	struct irda_usb_cb *self;
1304	int ret = 0;
1305
1306	IRDA_ASSERT(dev != NULL, return -1;);
1307	self = netdev_priv(dev);
1308	IRDA_ASSERT(self != NULL, return -1;);
1309
1310	IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
1311
1312	switch (cmd) {
1313	case SIOCSBANDWIDTH: /* Set bandwidth */
1314		if (!capable(CAP_NET_ADMIN))
1315			return -EPERM;
1316		/* Protect us from USB callbacks, net watchdog and else. */
1317		spin_lock_irqsave(&self->lock, flags);
1318		/* Check if the device is still there */
1319		if(self->present) {
1320			/* Set the desired speed */
1321			self->new_speed = irq->ifr_baudrate;
1322			irda_usb_change_speed_xbofs(self);
1323		}
1324		spin_unlock_irqrestore(&self->lock, flags);
1325		break;
1326	case SIOCSMEDIABUSY: /* Set media busy */
1327		if (!capable(CAP_NET_ADMIN))
1328			return -EPERM;
1329		/* Check if the IrDA stack is still there */
1330		if(self->netopen)
1331			irda_device_set_media_busy(self->netdev, TRUE);
1332		break;
1333	case SIOCGRECEIVING: /* Check if we are receiving right now */
1334		irq->ifr_receiving = irda_usb_is_receiving(self);
1335		break;
1336	default:
1337		ret = -EOPNOTSUPP;
1338	}
1339	
1340	return ret;
1341}
1342
1343/*------------------------------------------------------------------*/
1344
1345/********************* IRDA CONFIG SUBROUTINES *********************/
1346/*
1347 * Various subroutines dealing with IrDA and network stuff we use to
1348 * configure and initialise each irda-usb instance.
1349 * These functions are used below in the main calls of the driver...
1350 */
1351
1352/*------------------------------------------------------------------*/
1353/*
1354 * Set proper values in the IrDA QOS structure
1355 */
1356static inline void irda_usb_init_qos(struct irda_usb_cb *self)
1357{
1358	struct irda_class_desc *desc;
1359
1360	IRDA_DEBUG(3, "%s()\n", __func__);
1361	
1362	desc = self->irda_desc;
1363	
1364	/* Initialize QoS for this device */
1365	irda_init_max_qos_capabilies(&self->qos);
1366
1367	/* See spec section 7.2 for meaning.
1368	 * Values are little endian (as most USB stuff), the IrDA stack
1369	 * use it in native order (see parameters.c). - Jean II */
1370	self->qos.baud_rate.bits       = le16_to_cpu(desc->wBaudRate);
1371	self->qos.min_turn_time.bits   = desc->bmMinTurnaroundTime;
1372	self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
1373	self->qos.window_size.bits     = desc->bmWindowSize;
1374	self->qos.data_size.bits       = desc->bmDataSize;
1375
1376	IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n", 
1377		__func__, self->qos.baud_rate.bits, self->qos.data_size.bits, self->qos.window_size.bits, self->qos.additional_bofs.bits, self->qos.min_turn_time.bits);
1378
1379	/* Don't always trust what the dongle tell us */
1380	if(self->capability & IUC_SIR_ONLY)
1381		self->qos.baud_rate.bits	&= 0x00ff;
1382	if(self->capability & IUC_SMALL_PKT)
1383		self->qos.data_size.bits	 = 0x07;
1384	if(self->capability & IUC_NO_WINDOW)
1385		self->qos.window_size.bits	 = 0x01;
1386	if(self->capability & IUC_MAX_WINDOW)
1387		self->qos.window_size.bits	 = 0x7f;
1388	if(self->capability & IUC_MAX_XBOFS)
1389		self->qos.additional_bofs.bits	 = 0x01;
1390
1391#if 1
1392	/* Module parameter can override the rx window size */
1393	if (qos_mtt_bits)
1394		self->qos.min_turn_time.bits = qos_mtt_bits;
1395#endif	    
1396	/* 
1397	 * Note : most of those values apply only for the receive path,
1398	 * the transmit path will be set differently - Jean II 
1399	 */
1400	irda_qos_bits_to_value(&self->qos);
1401}
1402
1403/*------------------------------------------------------------------*/
1404static const struct net_device_ops irda_usb_netdev_ops = {
1405	.ndo_open       = irda_usb_net_open,
1406	.ndo_stop       = irda_usb_net_close,
1407	.ndo_do_ioctl   = irda_usb_net_ioctl,
1408	.ndo_start_xmit = irda_usb_hard_xmit,
1409	.ndo_tx_timeout	= irda_usb_net_timeout,
1410};
1411
1412/*
1413 * Initialise the network side of the irda-usb instance
1414 * Called when a new USB instance is registered in irda_usb_probe()
1415 */
1416static inline int irda_usb_open(struct irda_usb_cb *self)
1417{
1418	struct net_device *netdev = self->netdev;
1419
1420	IRDA_DEBUG(1, "%s()\n", __func__);
1421
1422	netdev->netdev_ops = &irda_usb_netdev_ops;
1423
1424	irda_usb_init_qos(self);
1425
1426	return register_netdev(netdev);
1427}
1428
1429/*------------------------------------------------------------------*/
1430/*
1431 * Cleanup the network side of the irda-usb instance
1432 * Called when a USB instance is removed in irda_usb_disconnect()
1433 */
1434static inline void irda_usb_close(struct irda_usb_cb *self)
1435{
1436	IRDA_DEBUG(1, "%s()\n", __func__);
1437
1438	/* Remove netdevice */
1439	unregister_netdev(self->netdev);
1440
1441	/* Remove the speed buffer */
1442	kfree(self->speed_buff);
1443	self->speed_buff = NULL;
1444
1445	kfree(self->tx_buff);
1446	self->tx_buff = NULL;
1447}
1448
1449/********************** USB CONFIG SUBROUTINES **********************/
1450/*
1451 * Various subroutines dealing with USB stuff we use to configure and
1452 * initialise each irda-usb instance.
1453 * These functions are used below in the main calls of the driver...
1454 */
1455
1456/*------------------------------------------------------------------*/
1457/*
1458 * Function irda_usb_parse_endpoints(dev, ifnum)
1459 *
1460 *    Parse the various endpoints and find the one we need.
1461 *
1462 * The endpoint are the pipes used to communicate with the USB device.
1463 * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
1464 * These are used to pass frames back and forth with the dongle.
1465 * Most dongle have also an interrupt endpoint, that will be probably
1466 * documented in the next spec...
1467 */
1468static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
1469{
1470	int i;		/* Endpoint index in table */
1471		
1472	/* Init : no endpoints */
1473	self->bulk_in_ep = 0;
1474	self->bulk_out_ep = 0;
1475	self->bulk_int_ep = 0;
1476
1477	/* Let's look at all those endpoints */
1478	for(i = 0; i < ennum; i++) {
1479		/* All those variables will get optimised by the compiler,
1480		 * so let's aim for clarity... - Jean II */
1481		__u8 ep;	/* Endpoint address */
1482		__u8 dir;	/* Endpoint direction */
1483		__u8 attr;	/* Endpoint attribute */
1484		__u16 psize;	/* Endpoint max packet size in bytes */
1485
1486		/* Get endpoint address, direction and attribute */
1487		ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1488		dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1489		attr = endpoint[i].desc.bmAttributes;
1490		psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
1491
1492		/* Is it a bulk endpoint ??? */
1493		if(attr == USB_ENDPOINT_XFER_BULK) {
1494			/* We need to find an IN and an OUT */
1495			if(dir == USB_DIR_IN) {
1496				/* This is our Rx endpoint */
1497				self->bulk_in_ep = ep;
1498			} else {
1499				/* This is our Tx endpoint */
1500				self->bulk_out_ep = ep;
1501				self->bulk_out_mtu = psize;
1502			}
1503		} else {
1504			if((attr == USB_ENDPOINT_XFER_INT) &&
1505			   (dir == USB_DIR_IN)) {
1506				/* This is our interrupt endpoint */
1507				self->bulk_int_ep = ep;
1508			} else {
1509				IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __func__, ep);
1510			}
1511		}
1512	}
1513
1514	IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
1515		__func__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep);
1516
1517	return (self->bulk_in_ep != 0) && (self->bulk_out_ep != 0);
1518}
1519
1520#ifdef IU_DUMP_CLASS_DESC
1521/*------------------------------------------------------------------*/
1522/*
1523 * Function usb_irda_dump_class_desc(desc)
1524 *
1525 *    Prints out the contents of the IrDA class descriptor
1526 *
1527 */
1528static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
1529{
1530	/* Values are little endian */
1531	printk("bLength=%x\n", desc->bLength);
1532	printk("bDescriptorType=%x\n", desc->bDescriptorType);
1533	printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision)); 
1534	printk("bmDataSize=%x\n", desc->bmDataSize);
1535	printk("bmWindowSize=%x\n", desc->bmWindowSize);
1536	printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
1537	printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
1538	printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
1539	printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
1540	printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
1541}
1542#endif /* IU_DUMP_CLASS_DESC */
1543
1544/*------------------------------------------------------------------*/
1545/*
1546 * Function irda_usb_find_class_desc(intf)
1547 *
1548 *    Returns instance of IrDA class descriptor, or NULL if not found
1549 *
1550 * The class descriptor is some extra info that IrDA USB devices will
1551 * offer to us, describing their IrDA characteristics. We will use that in
1552 * irda_usb_init_qos()
1553 */
1554static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
1555{
1556	struct usb_device *dev = interface_to_usbdev (intf);
1557	struct irda_class_desc *desc;
1558	int ret;
1559
1560	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
1561	if (!desc)
1562		return NULL;
1563
1564	/* USB-IrDA class spec 1.0:
1565	 *	6.1.3: Standard "Get Descriptor" Device Request is not
1566	 *	       appropriate to retrieve class-specific descriptor
1567	 *	6.2.5: Class Specific "Get Class Descriptor" Interface Request
1568	 *	       is mandatory and returns the USB-IrDA class descriptor
1569	 */
1570
1571	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
1572		IU_REQ_GET_CLASS_DESC,
1573		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1574		0, intf->altsetting->desc.bInterfaceNumber, desc,
1575		sizeof(*desc), 500);
1576	
1577	IRDA_DEBUG(1, "%s(), ret=%d\n", __func__, ret);
1578	if (ret < sizeof(*desc)) {
1579		IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n",
1580			     (ret<0) ? "failed" : "too short", ret);
1581	}
1582	else if (desc->bDescriptorType != USB_DT_IRDA) {
1583		IRDA_WARNING("usb-irda: bad class_descriptor type\n");
1584	}
1585	else {
1586#ifdef IU_DUMP_CLASS_DESC
1587		irda_usb_dump_class_desc(desc);
1588#endif	/* IU_DUMP_CLASS_DESC */
1589
1590		return desc;
1591	}
1592	kfree(desc);
1593	return NULL;
1594}
1595
1596/*********************** USB DEVICE CALLBACKS ***********************/
1597/*
1598 * Main calls from the USB subsystem.
1599 * Mostly registering a new irda-usb device and removing it....
1600 */
1601
1602/*------------------------------------------------------------------*/
1603/*
1604 * This routine is called by the USB subsystem for each new device
1605 * in the system. We need to check if the device is ours, and in
1606 * this case start handling it.
1607 * The USB layer protect us from reentrancy (via BKL), so we don't need
1608 * to spinlock in there... Jean II
1609 */
1610static int irda_usb_probe(struct usb_interface *intf,
1611			  const struct usb_device_id *id)
1612{
1613	struct net_device *net;
1614	struct usb_device *dev = interface_to_usbdev(intf);
1615	struct irda_usb_cb *self;
1616	struct usb_host_interface *interface;
1617	struct irda_class_desc *irda_desc;
1618	int ret = -ENOMEM;
1619	int i;		/* Driver instance index / Rx URB index */
1620
1621	/* Note : the probe make sure to call us only for devices that
1622	 * matches the list of dongle (top of the file). So, we
1623	 * don't need to check if the dongle is really ours.
1624	 * Jean II */
1625
1626	IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
1627		     dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1628		     le16_to_cpu(dev->descriptor.idProduct));
1629
1630	net = alloc_irdadev(sizeof(*self));
1631	if (!net) 
1632		goto err_out;
1633
1634	SET_NETDEV_DEV(net, &intf->dev);
1635	self = netdev_priv(net);
1636	self->netdev = net;
1637	spin_lock_init(&self->lock);
1638	init_timer(&self->rx_defer_timer);
1639
1640	self->capability = id->driver_info;
1641	self->needspatch = ((self->capability & IUC_STIR421X) != 0);
1642
1643	/* Create all of the needed urbs */
1644	if (self->capability & IUC_STIR421X) {
1645		self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
1646		self->header_length = USB_IRDA_STIR421X_HEADER;
1647	} else {
1648		self->max_rx_urb = IU_MAX_RX_URBS;
1649		self->header_length = USB_IRDA_HEADER;
1650	}
1651
1652	self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
1653				GFP_KERNEL);
1654	if (!self->rx_urb)
1655		goto err_free_net;
1656
1657	for (i = 0; i < self->max_rx_urb; i++) {
1658		self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1659		if (!self->rx_urb[i]) {
1660			goto err_out_1;
1661		}
1662	}
1663	self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1664	if (!self->tx_urb) {
1665		goto err_out_1;
1666	}
1667	self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1668	if (!self->speed_urb) {
1669		goto err_out_2;
1670	}
1671
1672	/* Is this really necessary? (no, except maybe for broken devices) */
1673	if (usb_reset_configuration (dev) < 0) {
1674		err("reset_configuration failed");
1675		ret = -EIO;
1676		goto err_out_3;
1677	}
1678
1679	/* Is this really necessary? */
1680	/* Note : some driver do hardcode the interface number, some others
1681	 * specify an alternate, but very few driver do like this.
1682	 * Jean II */
1683	ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1684	IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret);
1685	switch (ret) {
1686		case 0:
1687			break;
1688		case -EPIPE:		/* -EPIPE = -32 */
1689			/* Martin Diehl says if we get a -EPIPE we should
1690			 * be fine and we don't need to do a usb_clear_halt().
1691			 * - Jean II */
1692			IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __func__);
1693			break;
1694		default:
1695			IRDA_DEBUG(0, "%s(), Unknown error %d\n", __func__, ret);
1696			ret = -EIO;
1697			goto err_out_3;
1698	}
1699
1700	/* Find our endpoints */
1701	interface = intf->cur_altsetting;
1702	if(!irda_usb_parse_endpoints(self, interface->endpoint,
1703				     interface->desc.bNumEndpoints)) {
1704		IRDA_ERROR("%s(), Bogus endpoints...\n", __func__);
1705		ret = -EIO;
1706		goto err_out_3;
1707	}
1708
1709	self->usbdev = dev;
1710
1711	/* Find IrDA class descriptor */
1712	irda_desc = irda_usb_find_class_desc(intf);
1713	ret = -ENODEV;
1714	if (!irda_desc)
1715		goto err_out_3;
1716
1717	if (self->needspatch) {
1718		ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
1719				       0x02, 0x40, 0, 0, NULL, 0, 500);
1720		if (ret < 0) {
1721			IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
1722			goto err_out_3;
1723		} else {
1724			mdelay(10);
1725		}
1726	}
1727
1728	self->irda_desc =  irda_desc;
1729	self->present = 1;
1730	self->netopen = 0;
1731	self->usbintf = intf;
1732
1733	/* Allocate the buffer for speed changes */
1734	/* Don't change this buffer size and allocation without doing
1735	 * some heavy and complete testing. Don't ask why :-(
1736	 * Jean II */
1737	self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1738	if (!self->speed_buff)
1739		goto err_out_3;
1740
1741	self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
1742				GFP_KERNEL);
1743	if (!self->tx_buff)
1744		goto err_out_4;
1745
1746	ret = irda_usb_open(self);
1747	if (ret) 
1748		goto err_out_5;
1749
1750	IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
1751	usb_set_intfdata(intf, self);
1752
1753	if (self->needspatch) {
1754		/* Now we fetch and upload the firmware patch */
1755		ret = stir421x_patch_device(self);
1756		self->needspatch = (ret < 0);
1757		if (self->needspatch) {
1758			IRDA_ERROR("STIR421X: Couldn't upload patch\n");
1759			goto err_out_6;
1760		}
1761
1762		/* replace IrDA class descriptor with what patched device is now reporting */
1763		irda_desc = irda_usb_find_class_desc (self->usbintf);
1764		if (!irda_desc) {
1765			ret = -ENODEV;
1766			goto err_out_6;
1767		}
1768		kfree(self->irda_desc);
1769		self->irda_desc = irda_desc;
1770		irda_usb_init_qos(self);
1771	}
1772
1773	return 0;
1774err_out_6:
1775	unregister_netdev(self->netdev);
1776err_out_5:
1777	kfree(self->tx_buff);
1778err_out_4:
1779	kfree(self->speed_buff);
1780err_out_3:
1781	/* Free all urbs that we may have created */
1782	usb_free_urb(self->speed_urb);
1783err_out_2:
1784	usb_free_urb(self->tx_urb);
1785err_out_1:
1786	for (i = 0; i < self->max_rx_urb; i++)
1787		usb_free_urb(self->rx_urb[i]);
1788	kfree(self->rx_urb);
1789err_free_net:
1790	free_netdev(net);
1791err_out:
1792	return ret;
1793}
1794
1795/*------------------------------------------------------------------*/
1796/*
1797 * The current irda-usb device is removed, the USB layer tell us
1798 * to shut it down...
1799 * One of the constraints is that when we exit this function,
1800 * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1801 * Most other subsystem allow you to destroy the instance at a time
1802 * when it's convenient to you, to postpone it to a later date, but
1803 * not the USB subsystem.
1804 * So, we must make bloody sure that everything gets deactivated.
1805 * Jean II
1806 */
1807static void irda_usb_disconnect(struct usb_interface *intf)
1808{
1809	unsigned long flags;
1810	struct irda_usb_cb *self = usb_get_intfdata(intf);
1811	int i;
1812
1813	IRDA_DEBUG(1, "%s()\n", __func__);
1814
1815	usb_set_intfdata(intf, NULL);
1816	if (!self)
1817		return;
1818
1819	/* Make sure that the Tx path is not executing. - Jean II */
1820	spin_lock_irqsave(&self->lock, flags);
1821
1822	/* Oups ! We are not there any more.
1823	 * This will stop/desactivate the Tx path. - Jean II */
1824	self->present = 0;
1825
1826	/* Kill defered Rx URB */
1827	del_timer(&self->rx_defer_timer);
1828
1829	/* We need to have irq enabled to unlink the URBs. That's OK,
1830	 * at this point the Tx path is gone - Jean II */
1831	spin_unlock_irqrestore(&self->lock, flags);
1832
1833	/* Hum... Check if networking is still active (avoid races) */
1834	if((self->netopen) || (self->irlap)) {
1835		/* Accept no more transmissions */
1836		/*netif_device_detach(self->netdev);*/
1837		netif_stop_queue(self->netdev);
1838		/* Stop all the receive URBs. Must be synchronous. */
1839		for (i = 0; i < self->max_rx_urb; i++)
1840			usb_kill_urb(self->rx_urb[i]);
1841		/* Cancel Tx and speed URB.
1842		 * Make sure it's synchronous to avoid races. */
1843		usb_kill_urb(self->tx_urb);
1844		usb_kill_urb(self->speed_urb);
1845	}
1846
1847	/* Cleanup the device stuff */
1848	irda_usb_close(self);
1849	/* No longer attached to USB bus */
1850	self->usbdev = NULL;
1851	self->usbintf = NULL;
1852
1853	/* Clean up our urbs */
1854	for (i = 0; i < self->max_rx_urb; i++)
1855		usb_free_urb(self->rx_urb[i]);
1856	kfree(self->rx_urb);
1857	/* Clean up Tx and speed URB */
1858	usb_free_urb(self->tx_urb);
1859	usb_free_urb(self->speed_urb);
1860
1861	/* Free self and network device */
1862	free_netdev(self->netdev);
1863	IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __func__);
1864}
1865
1866#ifdef CONFIG_PM
1867/* USB suspend, so power off the transmitter/receiver */
1868static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
1869{
1870	struct irda_usb_cb *self = usb_get_intfdata(intf);
1871	int i;
1872
1873	netif_device_detach(self->netdev);
1874
1875	if (self->tx_urb != NULL)
1876		usb_kill_urb(self->tx_urb);
1877	if (self->speed_urb != NULL)
1878		usb_kill_urb(self->speed_urb);
1879	for (i = 0; i < self->max_rx_urb; i++) {
1880		if (self->rx_urb[i] != NULL)
1881			usb_kill_urb(self->rx_urb[i]);
1882	}
1883	return 0;
1884}
1885
1886/* Coming out of suspend, so reset hardware */
1887static int irda_usb_resume(struct usb_interface *intf)
1888{
1889	struct irda_usb_cb *self = usb_get_intfdata(intf);
1890	int i;
1891
1892	for (i = 0; i < self->max_rx_urb; i++) {
1893		if (self->rx_urb[i] != NULL)
1894			usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
1895	}
1896
1897	netif_device_attach(self->netdev);
1898	return 0;
1899}
1900#endif
1901
1902/*------------------------------------------------------------------*/
1903/*
1904 * USB device callbacks
1905 */
1906static struct usb_driver irda_driver = {
1907	.name		= "irda-usb",
1908	.probe		= irda_usb_probe,
1909	.disconnect	= irda_usb_disconnect,
1910	.id_table	= dongles,
1911#ifdef CONFIG_PM
1912	.suspend	= irda_usb_suspend,
1913	.resume		= irda_usb_resume,
1914#endif
1915};
1916
1917/************************* MODULE CALLBACKS *************************/
1918/*
1919 * Deal with module insertion/removal
1920 * Mostly tell USB about our existence
1921 */
1922
1923/*------------------------------------------------------------------*/
1924/*
1925 * Module insertion
1926 */
1927static int __init usb_irda_init(void)
1928{
1929	int	ret;
1930
1931	ret = usb_register(&irda_driver);
1932	if (ret < 0)
1933		return ret;
1934
1935	IRDA_MESSAGE("USB IrDA support registered\n");
1936	return 0;
1937}
1938module_init(usb_irda_init);
1939
1940/*------------------------------------------------------------------*/
1941/*
1942 * Module removal
1943 */
1944static void __exit usb_irda_cleanup(void)
1945{
1946	/* Deregister the driver and remove all pending instances */
1947	usb_deregister(&irda_driver);
1948}
1949module_exit(usb_irda_cleanup);
1950
1951/*------------------------------------------------------------------*/
1952/*
1953 * Module parameters
1954 */
1955module_param(qos_mtt_bits, int, 0);
1956MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
1957MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>");
1958MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
1959MODULE_LICENSE("GPL");