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