e8e33bb9d8765653f84fd10e9ea1fe327889d903
[linux-2.6.git] / drivers / net / irda / irda-usb.c
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
73 static int qos_mtt_bits = 0;
74
75 /* These are the currently known IrDA USB dongles. Add new dongles here */
76 static 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
106 MODULE_DEVICE_TABLE(usb, dongles);
107
108 /*------------------------------------------------------------------*/
109
110 static void irda_usb_init_qos(struct irda_usb_cb *self) ;
111 static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf);
112 static void irda_usb_disconnect(struct usb_interface *intf);
113 static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self);
114 static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
115                                             struct net_device *dev);
116 static int irda_usb_open(struct irda_usb_cb *self);
117 static void irda_usb_close(struct irda_usb_cb *self);
118 static void speed_bulk_callback(struct urb *urb);
119 static void write_bulk_callback(struct urb *urb);
120 static void irda_usb_receive(struct urb *urb);
121 static void irda_usb_rx_defer_expired(unsigned long data);
122 static int irda_usb_net_open(struct net_device *dev);
123 static int irda_usb_net_close(struct net_device *dev);
124 static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
125 static 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  */
149 static 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 */
271 static __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  */
299 static 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  */
346 static 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 commited 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  */
385 static 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
541 drop:
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  */
552 static 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 commited 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  */
627 static 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  */
760 static 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  */
799 static 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
932 done:
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  */
960 static 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  */
988 static 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  */
1024 static 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   */
1072 static 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; (fw->data[i] != STIR421X_PATCH_END_OF_HDR_TAG) &&
1128                              (i < fw->size); i++) ;
1129                 /* here we check for the out of buffer case */
1130                 if ((STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) &&
1131                     (i < STIR421X_PATCH_CODE_OFFSET)) {
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  */
1166 static 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  */
1250 static 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  */
1299 static 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  */
1356 static 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 /*------------------------------------------------------------------*/
1404 static 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  */
1416 static 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  */
1434 static 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  */
1468 static 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  */
1528 static 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  */
1554 static 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  */
1610 static 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
1655         for (i = 0; i < self->max_rx_urb; i++) {
1656                 self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1657                 if (!self->rx_urb[i]) {
1658                         goto err_out_1;
1659                 }
1660         }
1661         self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1662         if (!self->tx_urb) {
1663                 goto err_out_1;
1664         }
1665         self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1666         if (!self->speed_urb) {
1667                 goto err_out_2;
1668         }
1669
1670         /* Is this really necessary? (no, except maybe for broken devices) */
1671         if (usb_reset_configuration (dev) < 0) {
1672                 err("reset_configuration failed");
1673                 ret = -EIO;
1674                 goto err_out_3;
1675         }
1676
1677         /* Is this really necessary? */
1678         /* Note : some driver do hardcode the interface number, some others
1679          * specify an alternate, but very few driver do like this.
1680          * Jean II */
1681         ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1682         IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret);
1683         switch (ret) {
1684                 case 0:
1685                         break;
1686                 case -EPIPE:            /* -EPIPE = -32 */
1687                         /* Martin Diehl says if we get a -EPIPE we should
1688                          * be fine and we don't need to do a usb_clear_halt().
1689                          * - Jean II */
1690                         IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __func__);
1691                         break;
1692                 default:
1693                         IRDA_DEBUG(0, "%s(), Unknown error %d\n", __func__, ret);
1694                         ret = -EIO;
1695                         goto err_out_3;
1696         }
1697
1698         /* Find our endpoints */
1699         interface = intf->cur_altsetting;
1700         if(!irda_usb_parse_endpoints(self, interface->endpoint,
1701                                      interface->desc.bNumEndpoints)) {
1702                 IRDA_ERROR("%s(), Bogus endpoints...\n", __func__);
1703                 ret = -EIO;
1704                 goto err_out_3;
1705         }
1706
1707         self->usbdev = dev;
1708
1709         /* Find IrDA class descriptor */
1710         irda_desc = irda_usb_find_class_desc(intf);
1711         ret = -ENODEV;
1712         if (!irda_desc)
1713                 goto err_out_3;
1714
1715         if (self->needspatch) {
1716                 ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
1717                                        0x02, 0x40, 0, 0, NULL, 0, 500);
1718                 if (ret < 0) {
1719                         IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
1720                         goto err_out_3;
1721                 } else {
1722                         mdelay(10);
1723                 }
1724         }
1725
1726         self->irda_desc =  irda_desc;
1727         self->present = 1;
1728         self->netopen = 0;
1729         self->usbintf = intf;
1730
1731         /* Allocate the buffer for speed changes */
1732         /* Don't change this buffer size and allocation without doing
1733          * some heavy and complete testing. Don't ask why :-(
1734          * Jean II */
1735         self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1736         if (!self->speed_buff)
1737                 goto err_out_3;
1738
1739         self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
1740                                 GFP_KERNEL);
1741         if (!self->tx_buff)
1742                 goto err_out_4;
1743
1744         ret = irda_usb_open(self);
1745         if (ret) 
1746                 goto err_out_5;
1747
1748         IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
1749         usb_set_intfdata(intf, self);
1750
1751         if (self->needspatch) {
1752                 /* Now we fetch and upload the firmware patch */
1753                 ret = stir421x_patch_device(self);
1754                 self->needspatch = (ret < 0);
1755                 if (self->needspatch) {
1756                         IRDA_ERROR("STIR421X: Couldn't upload patch\n");
1757                         goto err_out_6;
1758                 }
1759
1760                 /* replace IrDA class descriptor with what patched device is now reporting */
1761                 irda_desc = irda_usb_find_class_desc (self->usbintf);
1762                 if (!irda_desc) {
1763                         ret = -ENODEV;
1764                         goto err_out_6;
1765                 }
1766                 kfree(self->irda_desc);
1767                 self->irda_desc = irda_desc;
1768                 irda_usb_init_qos(self);
1769         }
1770
1771         return 0;
1772 err_out_6:
1773         unregister_netdev(self->netdev);
1774 err_out_5:
1775         kfree(self->tx_buff);
1776 err_out_4:
1777         kfree(self->speed_buff);
1778 err_out_3:
1779         /* Free all urbs that we may have created */
1780         usb_free_urb(self->speed_urb);
1781 err_out_2:
1782         usb_free_urb(self->tx_urb);
1783 err_out_1:
1784         for (i = 0; i < self->max_rx_urb; i++)
1785                 usb_free_urb(self->rx_urb[i]);
1786         free_netdev(net);
1787 err_out:
1788         return ret;
1789 }
1790
1791 /*------------------------------------------------------------------*/
1792 /*
1793  * The current irda-usb device is removed, the USB layer tell us
1794  * to shut it down...
1795  * One of the constraints is that when we exit this function,
1796  * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1797  * Most other subsystem allow you to destroy the instance at a time
1798  * when it's convenient to you, to postpone it to a later date, but
1799  * not the USB subsystem.
1800  * So, we must make bloody sure that everything gets deactivated.
1801  * Jean II
1802  */
1803 static void irda_usb_disconnect(struct usb_interface *intf)
1804 {
1805         unsigned long flags;
1806         struct irda_usb_cb *self = usb_get_intfdata(intf);
1807         int i;
1808
1809         IRDA_DEBUG(1, "%s()\n", __func__);
1810
1811         usb_set_intfdata(intf, NULL);
1812         if (!self)
1813                 return;
1814
1815         /* Make sure that the Tx path is not executing. - Jean II */
1816         spin_lock_irqsave(&self->lock, flags);
1817
1818         /* Oups ! We are not there any more.
1819          * This will stop/desactivate the Tx path. - Jean II */
1820         self->present = 0;
1821
1822         /* Kill defered Rx URB */
1823         del_timer(&self->rx_defer_timer);
1824
1825         /* We need to have irq enabled to unlink the URBs. That's OK,
1826          * at this point the Tx path is gone - Jean II */
1827         spin_unlock_irqrestore(&self->lock, flags);
1828
1829         /* Hum... Check if networking is still active (avoid races) */
1830         if((self->netopen) || (self->irlap)) {
1831                 /* Accept no more transmissions */
1832                 /*netif_device_detach(self->netdev);*/
1833                 netif_stop_queue(self->netdev);
1834                 /* Stop all the receive URBs. Must be synchronous. */
1835                 for (i = 0; i < self->max_rx_urb; i++)
1836                         usb_kill_urb(self->rx_urb[i]);
1837                 /* Cancel Tx and speed URB.
1838                  * Make sure it's synchronous to avoid races. */
1839                 usb_kill_urb(self->tx_urb);
1840                 usb_kill_urb(self->speed_urb);
1841         }
1842
1843         /* Cleanup the device stuff */
1844         irda_usb_close(self);
1845         /* No longer attached to USB bus */
1846         self->usbdev = NULL;
1847         self->usbintf = NULL;
1848
1849         /* Clean up our urbs */
1850         for (i = 0; i < self->max_rx_urb; i++)
1851                 usb_free_urb(self->rx_urb[i]);
1852         kfree(self->rx_urb);
1853         /* Clean up Tx and speed URB */
1854         usb_free_urb(self->tx_urb);
1855         usb_free_urb(self->speed_urb);
1856
1857         /* Free self and network device */
1858         free_netdev(self->netdev);
1859         IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __func__);
1860 }
1861
1862 #ifdef CONFIG_PM
1863 /* USB suspend, so power off the transmitter/receiver */
1864 static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
1865 {
1866         struct irda_usb_cb *self = usb_get_intfdata(intf);
1867         int i;
1868
1869         netif_device_detach(self->netdev);
1870
1871         if (self->tx_urb != NULL)
1872                 usb_kill_urb(self->tx_urb);
1873         if (self->speed_urb != NULL)
1874                 usb_kill_urb(self->speed_urb);
1875         for (i = 0; i < self->max_rx_urb; i++) {
1876                 if (self->rx_urb[i] != NULL)
1877                         usb_kill_urb(self->rx_urb[i]);
1878         }
1879         return 0;
1880 }
1881
1882 /* Coming out of suspend, so reset hardware */
1883 static int irda_usb_resume(struct usb_interface *intf)
1884 {
1885         struct irda_usb_cb *self = usb_get_intfdata(intf);
1886         int i;
1887
1888         for (i = 0; i < self->max_rx_urb; i++) {
1889                 if (self->rx_urb[i] != NULL)
1890                         usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
1891         }
1892
1893         netif_device_attach(self->netdev);
1894         return 0;
1895 }
1896 #endif
1897
1898 /*------------------------------------------------------------------*/
1899 /*
1900  * USB device callbacks
1901  */
1902 static struct usb_driver irda_driver = {
1903         .name           = "irda-usb",
1904         .probe          = irda_usb_probe,
1905         .disconnect     = irda_usb_disconnect,
1906         .id_table       = dongles,
1907 #ifdef CONFIG_PM
1908         .suspend        = irda_usb_suspend,
1909         .resume         = irda_usb_resume,
1910 #endif
1911 };
1912
1913 /************************* MODULE CALLBACKS *************************/
1914 /*
1915  * Deal with module insertion/removal
1916  * Mostly tell USB about our existence
1917  */
1918
1919 /*------------------------------------------------------------------*/
1920 /*
1921  * Module insertion
1922  */
1923 static int __init usb_irda_init(void)
1924 {
1925         int     ret;
1926
1927         ret = usb_register(&irda_driver);
1928         if (ret < 0)
1929                 return ret;
1930
1931         IRDA_MESSAGE("USB IrDA support registered\n");
1932         return 0;
1933 }
1934 module_init(usb_irda_init);
1935
1936 /*------------------------------------------------------------------*/
1937 /*
1938  * Module removal
1939  */
1940 static void __exit usb_irda_cleanup(void)
1941 {
1942         /* Deregister the driver and remove all pending instances */
1943         usb_deregister(&irda_driver);
1944 }
1945 module_exit(usb_irda_cleanup);
1946
1947 /*------------------------------------------------------------------*/
1948 /*
1949  * Module parameters
1950  */
1951 module_param(qos_mtt_bits, int, 0);
1952 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
1953 MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>");
1954 MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
1955 MODULE_LICENSE("GPL");