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Linux 2.6.17.7
[linux/fpc-iii.git] / drivers / net / irda / irda-usb.c
blobcd87593e4e8ae6cfe464a5926c91d1db9469b5e0
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_STIR_4210 | IUC_SPEED_BUG },
87 { USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR_4210 | IUC_SPEED_BUG },
88 { USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR_4210 | 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 int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *dev);
115 static int irda_usb_open(struct irda_usb_cb *self);
116 static void irda_usb_close(struct irda_usb_cb *self);
117 static void speed_bulk_callback(struct urb *urb, struct pt_regs *regs);
118 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs);
119 static void irda_usb_receive(struct urb *urb, struct pt_regs *regs);
120 static void irda_usb_rx_defer_expired(unsigned long data);
121 static int irda_usb_net_open(struct net_device *dev);
122 static int irda_usb_net_close(struct net_device *dev);
123 static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
124 static void irda_usb_net_timeout(struct net_device *dev);
125 static struct net_device_stats *irda_usb_net_get_stats(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_STIR_4210 &&
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", __FUNCTION__);
181 *header = 0;
182 return;
183 }
184
185 IRDA_DEBUG(2, "%s(), changing speed to %d\n", __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__,
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", __FUNCTION__);
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_STIR_4210 ) {
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", __FUNCTION__);
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, struct pt_regs *regs)
347 {
348 struct irda_usb_cb *self = urb->context;
349
350 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
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", __FUNCTION__, 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 int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
386 {
387 struct irda_usb_cb *self = netdev->priv;
388 struct urb *urb = self->tx_urb;
389 unsigned long flags;
390 s32 speed;
391 s16 xbofs;
392 int res, mtt;
393 int err = 1; /* Failed */
394
395 IRDA_DEBUG(4, "%s() on %s\n", __FUNCTION__, 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", __FUNCTION__);
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 err = 0; /* No error */
435 goto drop;
436 }
437 }
438
439 if (urb->status != 0) {
440 IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__);
441 goto drop;
442 }
443
444 /* Make sure there is room for IrDA-USB header. The actual
445 * allocation will be done lower in skb_push().
446 * Also, we don't use directly skb_cow(), because it require
447 * headroom >= 16, which force unnecessary copies - Jean II */
448 if (skb_headroom(skb) < self->header_length) {
449 IRDA_DEBUG(0, "%s(), Insuficient skb headroom.\n", __FUNCTION__);
450 if (skb_cow(skb, self->header_length)) {
451 IRDA_WARNING("%s(), failed skb_cow() !!!\n", __FUNCTION__);
452 goto drop;
453 }
454 }
455
456 /* Change setting for next frame */
457
458 if ( self->capability & IUC_STIR_4210 ) {
459 __u8 turnaround_time;
460 __u8* frame;
461 turnaround_time = get_turnaround_time( skb );
462 frame= skb_push(skb, self->header_length);
463 irda_usb_build_header(self, frame, 0);
464 frame[2] = turnaround_time;
465 if ((skb->len != 0) &&
466 ((skb->len % 128) == 0) &&
467 ((skb->len % 512) != 0)) {
468 /* add extra byte for special SigmaTel feature */
469 frame[1] = 1;
470 skb_put(skb, 1);
471 } else {
472 frame[1] = 0;
473 }
474 } else {
475 irda_usb_build_header(self, skb_push(skb, self->header_length), 0);
476 }
477
478 /* FIXME: Make macro out of this one */
479 ((struct irda_skb_cb *)skb->cb)->context = self;
480
481 usb_fill_bulk_urb(urb, self->usbdev,
482 usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
483 skb->data, IRDA_SKB_MAX_MTU,
484 write_bulk_callback, skb);
485 urb->transfer_buffer_length = skb->len;
486 /* This flag (URB_ZERO_PACKET) indicates that what we send is not
487 * a continuous stream of data but separate packets.
488 * In this case, the USB layer will insert an empty USB frame (TD)
489 * after each of our packets that is exact multiple of the frame size.
490 * This is how the dongle will detect the end of packet - Jean II */
491 urb->transfer_flags = URB_ZERO_PACKET;
492
493 /* Generate min turn time. FIXME: can we do better than this? */
494 /* Trying to a turnaround time at this level is trying to measure
495 * processor clock cycle with a wrist-watch, approximate at best...
496 *
497 * What we know is the last time we received a frame over USB.
498 * Due to latency over USB that depend on the USB load, we don't
499 * know when this frame was received over IrDA (a few ms before ?)
500 * Then, same story for our outgoing frame...
501 *
502 * In theory, the USB dongle is supposed to handle the turnaround
503 * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's
504 * why this code is enabled only for dongles that doesn't meet
505 * the spec.
506 * Jean II */
507 if (self->capability & IUC_NO_TURN) {
508 mtt = irda_get_mtt(skb);
509 if (mtt) {
510 int diff;
511 do_gettimeofday(&self->now);
512 diff = self->now.tv_usec - self->stamp.tv_usec;
513 #ifdef IU_USB_MIN_RTT
514 /* Factor in USB delays -> Get rid of udelay() that
515 * would be lost in the noise - Jean II */
516 diff += IU_USB_MIN_RTT;
517 #endif /* IU_USB_MIN_RTT */
518 /* If the usec counter did wraparound, the diff will
519 * go negative (tv_usec is a long), so we need to
520 * correct it by one second. Jean II */
521 if (diff < 0)
522 diff += 1000000;
523
524 /* Check if the mtt is larger than the time we have
525 * already used by all the protocol processing
526 */
527 if (mtt > diff) {
528 mtt -= diff;
529 if (mtt > 1000)
530 mdelay(mtt/1000);
531 else
532 udelay(mtt);
533 }
534 }
535 }
536
537 /* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
538 if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
539 IRDA_WARNING("%s(), failed Tx URB\n", __FUNCTION__);
540 self->stats.tx_errors++;
541 /* Let USB recover : We will catch that in the watchdog */
542 /*netif_start_queue(netdev);*/
543 } else {
544 /* Increment packet stats */
545 self->stats.tx_packets++;
546 self->stats.tx_bytes += skb->len;
547
548 netdev->trans_start = jiffies;
549 }
550 spin_unlock_irqrestore(&self->lock, flags);
551
552 return 0;
553
554 drop:
555 /* Drop silently the skb and exit */
556 dev_kfree_skb(skb);
557 spin_unlock_irqrestore(&self->lock, flags);
558 return err; /* Usually 1 */
559 }
560
561 /*------------------------------------------------------------------*/
562 /*
563 * Note : this function will be called only for tx_urb...
564 */
565 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
566 {
567 unsigned long flags;
568 struct sk_buff *skb = urb->context;
569 struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
570
571 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
572
573 /* We should always have a context */
574 IRDA_ASSERT(self != NULL, return;);
575 /* We should always be called for the speed URB */
576 IRDA_ASSERT(urb == self->tx_urb, return;);
577
578 /* Free up the skb */
579 dev_kfree_skb_any(skb);
580 urb->context = NULL;
581
582 /* Check for timeout and other USB nasties */
583 if (urb->status != 0) {
584 /* I get a lot of -ECONNABORTED = -103 here - Jean II */
585 IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __FUNCTION__, urb->status, urb->transfer_flags);
586
587 /* Don't do anything here, that might confuse the USB layer,
588 * and we could go in recursion and blow the kernel stack...
589 * Instead, we will wait for irda_usb_net_timeout(), the
590 * network layer watchdog, to fix the situation.
591 * Jean II */
592 /* A reset of the dongle might be welcomed here - Jean II */
593 return;
594 }
595
596 /* urb is now available */
597 //urb->status = 0; -> tested above
598
599 /* Make sure we read self->present properly */
600 spin_lock_irqsave(&self->lock, flags);
601
602 /* If the network is closed, stop everything */
603 if ((!self->netopen) || (!self->present)) {
604 IRDA_DEBUG(0, "%s(), Network is gone...\n", __FUNCTION__);
605 spin_unlock_irqrestore(&self->lock, flags);
606 return;
607 }
608
609 /* If changes to speed or xbofs is pending... */
610 if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
611 if ((self->new_speed != self->speed) ||
612 (self->new_xbofs != self->xbofs)) {
613 /* We haven't changed speed yet (because of
614 * IUC_SPEED_BUG), so do it now - Jean II */
615 IRDA_DEBUG(1, "%s(), Changing speed now...\n", __FUNCTION__);
616 irda_usb_change_speed_xbofs(self);
617 } else {
618 /* New speed and xbof is now commited in hardware */
619 self->new_speed = -1;
620 self->new_xbofs = -1;
621 /* Done, waiting for next packet */
622 netif_wake_queue(self->netdev);
623 }
624 } else {
625 /* Otherwise, allow the stack to send more packets */
626 netif_wake_queue(self->netdev);
627 }
628 spin_unlock_irqrestore(&self->lock, flags);
629 }
630
631 /*------------------------------------------------------------------*/
632 /*
633 * Watchdog timer from the network layer.
634 * After a predetermined timeout, if we don't give confirmation that
635 * the packet has been sent (i.e. no call to netif_wake_queue()),
636 * the network layer will call this function.
637 * Note that URB that we submit have also a timeout. When the URB timeout
638 * expire, the normal URB callback is called (write_bulk_callback()).
639 */
640 static void irda_usb_net_timeout(struct net_device *netdev)
641 {
642 unsigned long flags;
643 struct irda_usb_cb *self = netdev->priv;
644 struct urb *urb;
645 int done = 0; /* If we have made any progress */
646
647 IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __FUNCTION__);
648 IRDA_ASSERT(self != NULL, return;);
649
650 /* Protect us from USB callbacks, net Tx and else. */
651 spin_lock_irqsave(&self->lock, flags);
652
653 /* self->present *MUST* be read under spinlock */
654 if (!self->present) {
655 IRDA_WARNING("%s(), device not present!\n", __FUNCTION__);
656 netif_stop_queue(netdev);
657 spin_unlock_irqrestore(&self->lock, flags);
658 return;
659 }
660
661 /* Check speed URB */
662 urb = self->speed_urb;
663 if (urb->status != 0) {
664 IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
665
666 switch (urb->status) {
667 case -EINPROGRESS:
668 usb_unlink_urb(urb);
669 /* Note : above will *NOT* call netif_wake_queue()
670 * in completion handler, we will come back here.
671 * Jean II */
672 done = 1;
673 break;
674 case -ECONNABORTED: /* -103 */
675 case -ECONNRESET: /* -104 */
676 case -ETIMEDOUT: /* -110 */
677 case -ENOENT: /* -2 (urb unlinked by us) */
678 default: /* ??? - Play safe */
679 urb->status = 0;
680 netif_wake_queue(self->netdev);
681 done = 1;
682 break;
683 }
684 }
685
686 /* Check Tx URB */
687 urb = self->tx_urb;
688 if (urb->status != 0) {
689 struct sk_buff *skb = urb->context;
690
691 IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
692
693 /* Increase error count */
694 self->stats.tx_errors++;
695
696 #ifdef IU_BUG_KICK_TIMEOUT
697 /* Can't be a bad idea to reset the speed ;-) - Jean II */
698 if(self->new_speed == -1)
699 self->new_speed = self->speed;
700 if(self->new_xbofs == -1)
701 self->new_xbofs = self->xbofs;
702 irda_usb_change_speed_xbofs(self);
703 #endif /* IU_BUG_KICK_TIMEOUT */
704
705 switch (urb->status) {
706 case -EINPROGRESS:
707 usb_unlink_urb(urb);
708 /* Note : above will *NOT* call netif_wake_queue()
709 * in completion handler, because urb->status will
710 * be -ENOENT. We will fix that at the next watchdog,
711 * leaving more time to USB to recover...
712 * Jean II */
713 done = 1;
714 break;
715 case -ECONNABORTED: /* -103 */
716 case -ECONNRESET: /* -104 */
717 case -ETIMEDOUT: /* -110 */
718 case -ENOENT: /* -2 (urb unlinked by us) */
719 default: /* ??? - Play safe */
720 if(skb != NULL) {
721 dev_kfree_skb_any(skb);
722 urb->context = NULL;
723 }
724 urb->status = 0;
725 netif_wake_queue(self->netdev);
726 done = 1;
727 break;
728 }
729 }
730 spin_unlock_irqrestore(&self->lock, flags);
731
732 /* Maybe we need a reset */
733 /* Note : Some drivers seem to use a usb_set_interface() when they
734 * need to reset the hardware. Hum...
735 */
736
737 /* if(done == 0) */
738 }
739
740 /************************* RECEIVE ROUTINES *************************/
741 /*
742 * Receive packets from the USB layer stack and pass them to the IrDA stack.
743 * Try to work around USB failures...
744 */
745
746 /*
747 * Note :
748 * Some of you may have noticed that most dongle have an interrupt in pipe
749 * that we don't use. Here is the little secret...
750 * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
751 * in every USB frame. This is unnecessary overhead.
752 * The interrupt in pipe will generate an event every time a packet is
753 * received. Reading an interrupt pipe adds minimal overhead, but has some
754 * latency (~1ms).
755 * If we are connected (speed != 9600), we want to minimise latency, so
756 * we just always hang the Rx URB and ignore the interrupt.
757 * If we are not connected (speed == 9600), there is usually no Rx traffic,
758 * and we want to minimise the USB overhead. In this case we should wait
759 * on the interrupt pipe and hang the Rx URB only when an interrupt is
760 * received.
761 * Jean II
762 *
763 * Note : don't read the above as what we are currently doing, but as
764 * something we could do with KC dongle. Also don't forget that the
765 * interrupt pipe is not part of the original standard, so this would
766 * need to be optional...
767 * Jean II
768 */
769
770 /*------------------------------------------------------------------*/
771 /*
772 * Submit a Rx URB to the USB layer to handle reception of a frame
773 * Mostly called by the completion callback of the previous URB.
774 *
775 * Jean II
776 */
777 static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
778 {
779 struct irda_skb_cb *cb;
780 int ret;
781
782 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
783
784 /* This should never happen */
785 IRDA_ASSERT(skb != NULL, return;);
786 IRDA_ASSERT(urb != NULL, return;);
787
788 /* Save ourselves in the skb */
789 cb = (struct irda_skb_cb *) skb->cb;
790 cb->context = self;
791
792 /* Reinitialize URB */
793 usb_fill_bulk_urb(urb, self->usbdev,
794 usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep),
795 skb->data, IRDA_SKB_MAX_MTU,
796 irda_usb_receive, skb);
797 urb->status = 0;
798
799 /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
800 ret = usb_submit_urb(urb, GFP_ATOMIC);
801 if (ret) {
802 /* If this ever happen, we are in deep s***.
803 * Basically, the Rx path will stop... */
804 IRDA_WARNING("%s(), Failed to submit Rx URB %d\n",
805 __FUNCTION__, ret);
806 }
807 }
808
809 /*------------------------------------------------------------------*/
810 /*
811 * Function irda_usb_receive(urb)
812 *
813 * Called by the USB subsystem when a frame has been received
814 *
815 */
816 static void irda_usb_receive(struct urb *urb, struct pt_regs *regs)
817 {
818 struct sk_buff *skb = (struct sk_buff *) urb->context;
819 struct irda_usb_cb *self;
820 struct irda_skb_cb *cb;
821 struct sk_buff *newskb;
822 struct sk_buff *dataskb;
823 struct urb *next_urb;
824 unsigned int len, docopy;
825
826 IRDA_DEBUG(2, "%s(), len=%d\n", __FUNCTION__, urb->actual_length);
827
828 /* Find ourselves */
829 cb = (struct irda_skb_cb *) skb->cb;
830 IRDA_ASSERT(cb != NULL, return;);
831 self = (struct irda_usb_cb *) cb->context;
832 IRDA_ASSERT(self != NULL, return;);
833
834 /* If the network is closed or the device gone, stop everything */
835 if ((!self->netopen) || (!self->present)) {
836 IRDA_DEBUG(0, "%s(), Network is gone!\n", __FUNCTION__);
837 /* Don't re-submit the URB : will stall the Rx path */
838 return;
839 }
840
841 /* Check the status */
842 if (urb->status != 0) {
843 switch (urb->status) {
844 case -EILSEQ:
845 self->stats.rx_crc_errors++;
846 /* Also precursor to a hot-unplug on UHCI. */
847 /* Fallthrough... */
848 case -ECONNRESET: /* -104 */
849 /* Random error, if I remember correctly */
850 /* uhci_cleanup_unlink() is going to kill the Rx
851 * URB just after we return. No problem, at this
852 * point the URB will be idle ;-) - Jean II */
853 case -ESHUTDOWN: /* -108 */
854 /* That's usually a hot-unplug. Submit will fail... */
855 case -ETIMEDOUT: /* -110 */
856 /* Usually precursor to a hot-unplug on OHCI. */
857 default:
858 self->stats.rx_errors++;
859 IRDA_DEBUG(0, "%s(), RX status %d, transfer_flags 0x%04X \n", __FUNCTION__, urb->status, urb->transfer_flags);
860 break;
861 }
862 /* If we received an error, we don't want to resubmit the
863 * Rx URB straight away but to give the USB layer a little
864 * bit of breathing room.
865 * We are in the USB thread context, therefore there is a
866 * danger of recursion (new URB we submit fails, we come
867 * back here).
868 * With recent USB stack (2.6.15+), I'm seeing that on
869 * hot unplug of the dongle...
870 * Lowest effective timer is 10ms...
871 * Jean II */
872 self->rx_defer_timer.function = &irda_usb_rx_defer_expired;
873 self->rx_defer_timer.data = (unsigned long) urb;
874 mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000));
875 return;
876 }
877
878 /* Check for empty frames */
879 if (urb->actual_length <= self->header_length) {
880 IRDA_WARNING("%s(), empty frame!\n", __FUNCTION__);
881 goto done;
882 }
883
884 /*
885 * Remember the time we received this frame, so we can
886 * reduce the min turn time a bit since we will know
887 * how much time we have used for protocol processing
888 */
889 do_gettimeofday(&self->stamp);
890
891 /* Check if we need to copy the data to a new skb or not.
892 * For most frames, we use ZeroCopy and pass the already
893 * allocated skb up the stack.
894 * If the frame is small, it is more efficient to copy it
895 * to save memory (copy will be fast anyway - that's
896 * called Rx-copy-break). Jean II */
897 docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
898
899 /* Allocate a new skb */
900 if ( self->capability & IUC_STIR_4210 )
901 newskb = dev_alloc_skb(docopy ? urb->actual_length : IRDA_SKB_MAX_MTU + USB_IRDA_SIGMATEL_HEADER);
902 else
903 newskb = dev_alloc_skb(docopy ? urb->actual_length : IRDA_SKB_MAX_MTU);
904
905 if (!newskb) {
906 self->stats.rx_dropped++;
907 /* We could deliver the current skb, but this would stall
908 * the Rx path. Better drop the packet... Jean II */
909 goto done;
910 }
911
912 /* Make sure IP header get aligned (IrDA header is 5 bytes) */
913 /* But IrDA-USB header is 1 byte. Jean II */
914 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
915
916 if(docopy) {
917 /* Copy packet, so we can recycle the original */
918 memcpy(newskb->data, skb->data, urb->actual_length);
919 /* Deliver this new skb */
920 dataskb = newskb;
921 /* And hook the old skb to the URB
922 * Note : we don't need to "clean up" the old skb,
923 * as we never touched it. Jean II */
924 } else {
925 /* We are using ZeroCopy. Deliver old skb */
926 dataskb = skb;
927 /* And hook the new skb to the URB */
928 skb = newskb;
929 }
930
931 /* Set proper length on skb & remove USB-IrDA header */
932 skb_put(dataskb, urb->actual_length);
933 skb_pull(dataskb, self->header_length);
934
935 /* Ask the networking layer to queue the packet for the IrDA stack */
936 dataskb->dev = self->netdev;
937 dataskb->mac.raw = dataskb->data;
938 dataskb->protocol = htons(ETH_P_IRDA);
939 len = dataskb->len;
940 netif_rx(dataskb);
941
942 /* Keep stats up to date */
943 self->stats.rx_bytes += len;
944 self->stats.rx_packets++;
945 self->netdev->last_rx = jiffies;
946
947 done:
948 /* Note : at this point, the URB we've just received (urb)
949 * is still referenced by the USB layer. For example, if we
950 * have received a -ECONNRESET, uhci_cleanup_unlink() will
951 * continue to process it (in fact, cleaning it up).
952 * If we were to submit this URB, disaster would ensue.
953 * Therefore, we submit our idle URB, and put this URB in our
954 * idle slot....
955 * Jean II */
956 /* Note : with this scheme, we could submit the idle URB before
957 * processing the Rx URB. I don't think it would buy us anything as
958 * we are running in the USB thread context. Jean II */
959 next_urb = self->idle_rx_urb;
960
961 /* Recycle Rx URB : Now, the idle URB is the present one */
962 urb->context = NULL;
963 self->idle_rx_urb = urb;
964
965 /* Submit the idle URB to replace the URB we've just received.
966 * Do it last to avoid race conditions... Jean II */
967 irda_usb_submit(self, skb, next_urb);
968 }
969
970 /*------------------------------------------------------------------*/
971 /*
972 * In case of errors, we want the USB layer to have time to recover.
973 * Now, it is time to resubmit ouur Rx URB...
974 */
975 static void irda_usb_rx_defer_expired(unsigned long data)
976 {
977 struct urb *urb = (struct urb *) data;
978 struct sk_buff *skb = (struct sk_buff *) urb->context;
979 struct irda_usb_cb *self;
980 struct irda_skb_cb *cb;
981 struct urb *next_urb;
982
983 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
984
985 /* Find ourselves */
986 cb = (struct irda_skb_cb *) skb->cb;
987 IRDA_ASSERT(cb != NULL, return;);
988 self = (struct irda_usb_cb *) cb->context;
989 IRDA_ASSERT(self != NULL, return;);
990
991 /* Same stuff as when Rx is done, see above... */
992 next_urb = self->idle_rx_urb;
993 urb->context = NULL;
994 self->idle_rx_urb = urb;
995 irda_usb_submit(self, skb, next_urb);
996 }
997
998 /*------------------------------------------------------------------*/
999 /*
1000 * Callbak from IrDA layer. IrDA wants to know if we have
1001 * started receiving anything.
1002 */
1003 static int irda_usb_is_receiving(struct irda_usb_cb *self)
1004 {
1005 /* Note : because of the way UHCI works, it's almost impossible
1006 * to get this info. The Controller DMA directly to memory and
1007 * signal only when the whole frame is finished. To know if the
1008 * first TD of the URB has been filled or not seems hard work...
1009 *
1010 * The other solution would be to use the "receiving" command
1011 * on the default decriptor with a usb_control_msg(), but that
1012 * would add USB traffic and would return result only in the
1013 * next USB frame (~1ms).
1014 *
1015 * I've been told that current dongles send status info on their
1016 * interrupt endpoint, and that's what the Windows driver uses
1017 * to know this info. Unfortunately, this is not yet in the spec...
1018 *
1019 * Jean II
1020 */
1021
1022 return 0; /* For now */
1023 }
1024
1025
1026 #define STIR421X_PATCH_PRODUCT_VERSION_STR "Product Version: "
1027 #define STIR421X_PATCH_COMPONENT_VERSION_STR "Component Version: "
1028 #define STIR421X_PATCH_DATA_TAG_STR "STMP"
1029 #define STIR421X_PATCH_FILE_VERSION_MAX_OFFSET 512 /* version info is before here */
1030 #define STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET 512 /* patch image starts before here */
1031 #define STIR421X_PATCH_FILE_END_OF_HEADER_TAG 0x1A /* marks end of patch file header (PC DOS text file EOF character) */
1032
1033 /*
1034 * Known firmware patches for STIR421x dongles
1035 */
1036 static char * stir421x_patches[] = {
1037 "42101001.sb",
1038 "42101002.sb",
1039 };
1040
1041 static int stir421x_get_patch_version(unsigned char * patch, const unsigned long patch_len)
1042 {
1043 unsigned int version_offset;
1044 unsigned long version_major, version_minor, version_build;
1045 unsigned char * version_start;
1046 int version_found = 0;
1047
1048 for (version_offset = 0;
1049 version_offset < STIR421X_PATCH_FILE_END_OF_HEADER_TAG;
1050 version_offset++) {
1051 if (!memcmp(patch + version_offset,
1052 STIR421X_PATCH_PRODUCT_VERSION_STR,
1053 sizeof(STIR421X_PATCH_PRODUCT_VERSION_STR) - 1)) {
1054 version_found = 1;
1055 version_start = patch +
1056 version_offset +
1057 sizeof(STIR421X_PATCH_PRODUCT_VERSION_STR) - 1;
1058 break;
1059 }
1060 }
1061
1062 /* We couldn't find a product version on this patch */
1063 if (!version_found)
1064 return -EINVAL;
1065
1066 /* Let's check if the product version is dotted */
1067 if (version_start[3] != '.' ||
1068 version_start[7] != '.')
1069 return -EINVAL;
1070
1071 version_major = simple_strtoul(version_start, NULL, 10);
1072 version_minor = simple_strtoul(version_start + 4, NULL, 10);
1073 version_build = simple_strtoul(version_start + 8, NULL, 10);
1074
1075 IRDA_DEBUG(2, "%s(), Major: %ld Minor: %ld Build: %ld\n",
1076 __FUNCTION__,
1077 version_major, version_minor, version_build);
1078
1079 return (((version_major) << 12) +
1080 ((version_minor) << 8) +
1081 ((version_build / 10) << 4) +
1082 (version_build % 10));
1083
1084 }
1085
1086
1087 static int stir421x_upload_patch (struct irda_usb_cb *self,
1088 unsigned char * patch,
1089 const unsigned int patch_len)
1090 {
1091 int retval = 0;
1092 int actual_len;
1093 unsigned int i = 0, download_amount = 0;
1094 unsigned char * patch_chunk;
1095
1096 IRDA_DEBUG (2, "%s(), Uploading STIR421x Patch\n", __FUNCTION__);
1097
1098 patch_chunk = kzalloc(STIR421X_MAX_PATCH_DOWNLOAD_SIZE, GFP_KERNEL);
1099 if (patch_chunk == NULL)
1100 return -ENOMEM;
1101
1102 /* break up patch into 1023-byte sections */
1103 for (i = 0; retval >= 0 && i < patch_len; i += download_amount) {
1104 download_amount = patch_len - i;
1105 if (download_amount > STIR421X_MAX_PATCH_DOWNLOAD_SIZE)
1106 download_amount = STIR421X_MAX_PATCH_DOWNLOAD_SIZE;
1107
1108 /* download the patch section */
1109 memcpy(patch_chunk, patch + i, download_amount);
1110
1111 retval = usb_bulk_msg (self->usbdev,
1112 usb_sndbulkpipe (self->usbdev,
1113 self->bulk_out_ep),
1114 patch_chunk, download_amount,
1115 &actual_len, msecs_to_jiffies (500));
1116 IRDA_DEBUG (2, "%s(), Sent %u bytes\n", __FUNCTION__,
1117 actual_len);
1118 if (retval == 0)
1119 mdelay(10);
1120 }
1121
1122 kfree(patch_chunk);
1123
1124 if (i != patch_len) {
1125 IRDA_ERROR ("%s(), Pushed %d bytes (!= patch_len (%d))\n",
1126 __FUNCTION__, i, patch_len);
1127 retval = -EIO;
1128 }
1129
1130 if (retval < 0)
1131 /* todo - mark device as not ready */
1132 IRDA_ERROR ("%s(), STIR421x patch upload failed (%d)\n",
1133 __FUNCTION__, retval);
1134
1135 return retval;
1136 }
1137
1138
1139 static int stir421x_patch_device(struct irda_usb_cb *self)
1140 {
1141 unsigned int i, patch_found = 0, data_found = 0, data_offset;
1142 int patch_version, ret = 0;
1143 const struct firmware *fw_entry;
1144
1145 for (i = 0; i < ARRAY_SIZE(stir421x_patches); i++) {
1146 if(request_firmware(&fw_entry, stir421x_patches[i], &self->usbdev->dev) != 0) {
1147 IRDA_ERROR( "%s(), Patch %s is not available\n", __FUNCTION__, stir421x_patches[i]);
1148 continue;
1149 }
1150
1151 /* We found a patch from userspace */
1152 patch_version = stir421x_get_patch_version (fw_entry->data, fw_entry->size);
1153
1154 if (patch_version < 0) {
1155 /* Couldn't fetch a version, let's move on to the next file */
1156 IRDA_ERROR("%s(), version parsing failed\n", __FUNCTION__);
1157 ret = patch_version;
1158 release_firmware(fw_entry);
1159 continue;
1160 }
1161
1162 if (patch_version != self->usbdev->descriptor.bcdDevice) {
1163 /* Patch version and device don't match */
1164 IRDA_ERROR ("%s(), wrong patch version (%d <-> %d)\n",
1165 __FUNCTION__,
1166 patch_version, self->usbdev->descriptor.bcdDevice);
1167 ret = -EINVAL;
1168 release_firmware(fw_entry);
1169 continue;
1170 }
1171
1172 /* If we're here, we've found a correct patch */
1173 patch_found = 1;
1174 break;
1175
1176 }
1177
1178 /* We couldn't find a valid firmware, let's leave */
1179 if (!patch_found)
1180 return ret;
1181
1182 /* The actual image starts after the "STMP" keyword */
1183 for (data_offset = 0; data_offset < STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET; data_offset++) {
1184 if (!memcmp(fw_entry->data + data_offset,
1185 STIR421X_PATCH_DATA_TAG_STR,
1186 sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET))) {
1187 IRDA_DEBUG(2, "%s(), found patch data for STIR421x at offset %d\n",
1188 __FUNCTION__, data_offset);
1189 data_found = 1;
1190 break;
1191 }
1192 }
1193
1194 /* We couldn't find "STMP" from the header */
1195 if (!data_found)
1196 return -EINVAL;
1197
1198 /* Let's upload the patch to the target */
1199 ret = stir421x_upload_patch(self,
1200 &fw_entry->data[data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)],
1201 fw_entry->size - (data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)));
1202
1203 release_firmware(fw_entry);
1204
1205 return ret;
1206
1207 }
1208
1209
1210 /********************** IRDA DEVICE CALLBACKS **********************/
1211 /*
1212 * Main calls from the IrDA/Network subsystem.
1213 * Mostly registering a new irda-usb device and removing it....
1214 * We only deal with the IrDA side of the business, the USB side will
1215 * be dealt with below...
1216 */
1217
1218
1219 /*------------------------------------------------------------------*/
1220 /*
1221 * Function irda_usb_net_open (dev)
1222 *
1223 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
1224 *
1225 * Note : don't mess with self->netopen - Jean II
1226 */
1227 static int irda_usb_net_open(struct net_device *netdev)
1228 {
1229 struct irda_usb_cb *self;
1230 char hwname[16];
1231 int i;
1232
1233 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
1234
1235 IRDA_ASSERT(netdev != NULL, return -1;);
1236 self = (struct irda_usb_cb *) netdev->priv;
1237 IRDA_ASSERT(self != NULL, return -1;);
1238
1239 /* Can only open the device if it's there */
1240 if(!self->present) {
1241 IRDA_WARNING("%s(), device not present!\n", __FUNCTION__);
1242 return -1;
1243 }
1244
1245 if(self->needspatch) {
1246 IRDA_WARNING("%s(), device needs patch\n", __FUNCTION__) ;
1247 return -EIO ;
1248 }
1249
1250 /* Initialise default speed and xbofs value
1251 * (IrLAP will change that soon) */
1252 self->speed = -1;
1253 self->xbofs = -1;
1254 self->new_speed = -1;
1255 self->new_xbofs = -1;
1256
1257 /* To do *before* submitting Rx urbs and starting net Tx queue
1258 * Jean II */
1259 self->netopen = 1;
1260
1261 /*
1262 * Now that everything should be initialized properly,
1263 * Open new IrLAP layer instance to take care of us...
1264 * Note : will send immediately a speed change...
1265 */
1266 sprintf(hwname, "usb#%d", self->usbdev->devnum);
1267 self->irlap = irlap_open(netdev, &self->qos, hwname);
1268 IRDA_ASSERT(self->irlap != NULL, return -1;);
1269
1270 /* Allow IrLAP to send data to us */
1271 netif_start_queue(netdev);
1272
1273 /* We submit all the Rx URB except for one that we keep idle.
1274 * Need to be initialised before submitting other USBs, because
1275 * in some cases as soon as we submit the URBs the USB layer
1276 * will trigger a dummy receive - Jean II */
1277 self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
1278 self->idle_rx_urb->context = NULL;
1279
1280 /* Now that we can pass data to IrLAP, allow the USB layer
1281 * to send us some data... */
1282 for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
1283 struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
1284 if (!skb) {
1285 /* If this ever happen, we are in deep s***.
1286 * Basically, we can't start the Rx path... */
1287 IRDA_WARNING("%s(), Failed to allocate Rx skb\n",
1288 __FUNCTION__);
1289 return -1;
1290 }
1291 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
1292 irda_usb_submit(self, skb, self->rx_urb[i]);
1293 }
1294
1295 /* Ready to play !!! */
1296 return 0;
1297 }
1298
1299 /*------------------------------------------------------------------*/
1300 /*
1301 * Function irda_usb_net_close (self)
1302 *
1303 * Network device is taken down. Usually this is done by
1304 * "ifconfig irda0 down"
1305 */
1306 static int irda_usb_net_close(struct net_device *netdev)
1307 {
1308 struct irda_usb_cb *self;
1309 int i;
1310
1311 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
1312
1313 IRDA_ASSERT(netdev != NULL, return -1;);
1314 self = (struct irda_usb_cb *) netdev->priv;
1315 IRDA_ASSERT(self != NULL, return -1;);
1316
1317 /* Clear this flag *before* unlinking the urbs and *before*
1318 * stopping the network Tx queue - Jean II */
1319 self->netopen = 0;
1320
1321 /* Stop network Tx queue */
1322 netif_stop_queue(netdev);
1323
1324 /* Kill defered Rx URB */
1325 del_timer(&self->rx_defer_timer);
1326
1327 /* Deallocate all the Rx path buffers (URBs and skb) */
1328 for (i = 0; i < self->max_rx_urb; i++) {
1329 struct urb *urb = self->rx_urb[i];
1330 struct sk_buff *skb = (struct sk_buff *) urb->context;
1331 /* Cancel the receive command */
1332 usb_kill_urb(urb);
1333 /* The skb is ours, free it */
1334 if(skb) {
1335 dev_kfree_skb(skb);
1336 urb->context = NULL;
1337 }
1338 }
1339 /* Cancel Tx and speed URB - need to be synchronous to avoid races */
1340 usb_kill_urb(self->tx_urb);
1341 usb_kill_urb(self->speed_urb);
1342
1343 /* Stop and remove instance of IrLAP */
1344 if (self->irlap)
1345 irlap_close(self->irlap);
1346 self->irlap = NULL;
1347
1348 return 0;
1349 }
1350
1351 /*------------------------------------------------------------------*/
1352 /*
1353 * IOCTLs : Extra out-of-band network commands...
1354 */
1355 static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1356 {
1357 unsigned long flags;
1358 struct if_irda_req *irq = (struct if_irda_req *) rq;
1359 struct irda_usb_cb *self;
1360 int ret = 0;
1361
1362 IRDA_ASSERT(dev != NULL, return -1;);
1363 self = dev->priv;
1364 IRDA_ASSERT(self != NULL, return -1;);
1365
1366 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
1367
1368 switch (cmd) {
1369 case SIOCSBANDWIDTH: /* Set bandwidth */
1370 if (!capable(CAP_NET_ADMIN))
1371 return -EPERM;
1372 /* Protect us from USB callbacks, net watchdog and else. */
1373 spin_lock_irqsave(&self->lock, flags);
1374 /* Check if the device is still there */
1375 if(self->present) {
1376 /* Set the desired speed */
1377 self->new_speed = irq->ifr_baudrate;
1378 irda_usb_change_speed_xbofs(self);
1379 }
1380 spin_unlock_irqrestore(&self->lock, flags);
1381 break;
1382 case SIOCSMEDIABUSY: /* Set media busy */
1383 if (!capable(CAP_NET_ADMIN))
1384 return -EPERM;
1385 /* Check if the IrDA stack is still there */
1386 if(self->netopen)
1387 irda_device_set_media_busy(self->netdev, TRUE);
1388 break;
1389 case SIOCGRECEIVING: /* Check if we are receiving right now */
1390 irq->ifr_receiving = irda_usb_is_receiving(self);
1391 break;
1392 default:
1393 ret = -EOPNOTSUPP;
1394 }
1395
1396 return ret;
1397 }
1398
1399 /*------------------------------------------------------------------*/
1400 /*
1401 * Get device stats (for /proc/net/dev and ifconfig)
1402 */
1403 static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev)
1404 {
1405 struct irda_usb_cb *self = dev->priv;
1406 return &self->stats;
1407 }
1408
1409 /********************* IRDA CONFIG SUBROUTINES *********************/
1410 /*
1411 * Various subroutines dealing with IrDA and network stuff we use to
1412 * configure and initialise each irda-usb instance.
1413 * These functions are used below in the main calls of the driver...
1414 */
1415
1416 /*------------------------------------------------------------------*/
1417 /*
1418 * Set proper values in the IrDA QOS structure
1419 */
1420 static inline void irda_usb_init_qos(struct irda_usb_cb *self)
1421 {
1422 struct irda_class_desc *desc;
1423
1424 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1425
1426 desc = self->irda_desc;
1427
1428 /* Initialize QoS for this device */
1429 irda_init_max_qos_capabilies(&self->qos);
1430
1431 /* See spec section 7.2 for meaning.
1432 * Values are little endian (as most USB stuff), the IrDA stack
1433 * use it in native order (see parameters.c). - Jean II */
1434 self->qos.baud_rate.bits = le16_to_cpu(desc->wBaudRate);
1435 self->qos.min_turn_time.bits = desc->bmMinTurnaroundTime;
1436 self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
1437 self->qos.window_size.bits = desc->bmWindowSize;
1438 self->qos.data_size.bits = desc->bmDataSize;
1439
1440 IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n",
1441 __FUNCTION__, 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);
1442
1443 /* Don't always trust what the dongle tell us */
1444 if(self->capability & IUC_SIR_ONLY)
1445 self->qos.baud_rate.bits &= 0x00ff;
1446 if(self->capability & IUC_SMALL_PKT)
1447 self->qos.data_size.bits = 0x07;
1448 if(self->capability & IUC_NO_WINDOW)
1449 self->qos.window_size.bits = 0x01;
1450 if(self->capability & IUC_MAX_WINDOW)
1451 self->qos.window_size.bits = 0x7f;
1452 if(self->capability & IUC_MAX_XBOFS)
1453 self->qos.additional_bofs.bits = 0x01;
1454
1455 #if 1
1456 /* Module parameter can override the rx window size */
1457 if (qos_mtt_bits)
1458 self->qos.min_turn_time.bits = qos_mtt_bits;
1459 #endif
1460 /*
1461 * Note : most of those values apply only for the receive path,
1462 * the transmit path will be set differently - Jean II
1463 */
1464 irda_qos_bits_to_value(&self->qos);
1465 }
1466
1467 /*------------------------------------------------------------------*/
1468 /*
1469 * Initialise the network side of the irda-usb instance
1470 * Called when a new USB instance is registered in irda_usb_probe()
1471 */
1472 static inline int irda_usb_open(struct irda_usb_cb *self)
1473 {
1474 struct net_device *netdev = self->netdev;
1475
1476 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
1477
1478 irda_usb_init_qos(self);
1479
1480 /* Override the network functions we need to use */
1481 netdev->hard_start_xmit = irda_usb_hard_xmit;
1482 netdev->tx_timeout = irda_usb_net_timeout;
1483 netdev->watchdog_timeo = 250*HZ/1000; /* 250 ms > USB timeout */
1484 netdev->open = irda_usb_net_open;
1485 netdev->stop = irda_usb_net_close;
1486 netdev->get_stats = irda_usb_net_get_stats;
1487 netdev->do_ioctl = irda_usb_net_ioctl;
1488
1489 return register_netdev(netdev);
1490 }
1491
1492 /*------------------------------------------------------------------*/
1493 /*
1494 * Cleanup the network side of the irda-usb instance
1495 * Called when a USB instance is removed in irda_usb_disconnect()
1496 */
1497 static inline void irda_usb_close(struct irda_usb_cb *self)
1498 {
1499 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
1500
1501 /* Remove netdevice */
1502 unregister_netdev(self->netdev);
1503
1504 /* Remove the speed buffer */
1505 kfree(self->speed_buff);
1506 self->speed_buff = NULL;
1507 }
1508
1509 /********************** USB CONFIG SUBROUTINES **********************/
1510 /*
1511 * Various subroutines dealing with USB stuff we use to configure and
1512 * initialise each irda-usb instance.
1513 * These functions are used below in the main calls of the driver...
1514 */
1515
1516 /*------------------------------------------------------------------*/
1517 /*
1518 * Function irda_usb_parse_endpoints(dev, ifnum)
1519 *
1520 * Parse the various endpoints and find the one we need.
1521 *
1522 * The endpoint are the pipes used to communicate with the USB device.
1523 * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
1524 * These are used to pass frames back and forth with the dongle.
1525 * Most dongle have also an interrupt endpoint, that will be probably
1526 * documented in the next spec...
1527 */
1528 static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
1529 {
1530 int i; /* Endpoint index in table */
1531
1532 /* Init : no endpoints */
1533 self->bulk_in_ep = 0;
1534 self->bulk_out_ep = 0;
1535 self->bulk_int_ep = 0;
1536
1537 /* Let's look at all those endpoints */
1538 for(i = 0; i < ennum; i++) {
1539 /* All those variables will get optimised by the compiler,
1540 * so let's aim for clarity... - Jean II */
1541 __u8 ep; /* Endpoint address */
1542 __u8 dir; /* Endpoint direction */
1543 __u8 attr; /* Endpoint attribute */
1544 __u16 psize; /* Endpoint max packet size in bytes */
1545
1546 /* Get endpoint address, direction and attribute */
1547 ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1548 dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1549 attr = endpoint[i].desc.bmAttributes;
1550 psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
1551
1552 /* Is it a bulk endpoint ??? */
1553 if(attr == USB_ENDPOINT_XFER_BULK) {
1554 /* We need to find an IN and an OUT */
1555 if(dir == USB_DIR_IN) {
1556 /* This is our Rx endpoint */
1557 self->bulk_in_ep = ep;
1558 } else {
1559 /* This is our Tx endpoint */
1560 self->bulk_out_ep = ep;
1561 self->bulk_out_mtu = psize;
1562 }
1563 } else {
1564 if((attr == USB_ENDPOINT_XFER_INT) &&
1565 (dir == USB_DIR_IN)) {
1566 /* This is our interrupt endpoint */
1567 self->bulk_int_ep = ep;
1568 } else {
1569 IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __FUNCTION__, ep);
1570 }
1571 }
1572 }
1573
1574 IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
1575 __FUNCTION__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep);
1576 /* Should be 8, 16, 32 or 64 bytes */
1577 IRDA_ASSERT(self->bulk_out_mtu == 64, ;);
1578
1579 return((self->bulk_in_ep != 0) && (self->bulk_out_ep != 0));
1580 }
1581
1582 #ifdef IU_DUMP_CLASS_DESC
1583 /*------------------------------------------------------------------*/
1584 /*
1585 * Function usb_irda_dump_class_desc(desc)
1586 *
1587 * Prints out the contents of the IrDA class descriptor
1588 *
1589 */
1590 static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
1591 {
1592 /* Values are little endian */
1593 printk("bLength=%x\n", desc->bLength);
1594 printk("bDescriptorType=%x\n", desc->bDescriptorType);
1595 printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision));
1596 printk("bmDataSize=%x\n", desc->bmDataSize);
1597 printk("bmWindowSize=%x\n", desc->bmWindowSize);
1598 printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
1599 printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
1600 printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
1601 printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
1602 printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
1603 }
1604 #endif /* IU_DUMP_CLASS_DESC */
1605
1606 /*------------------------------------------------------------------*/
1607 /*
1608 * Function irda_usb_find_class_desc(intf)
1609 *
1610 * Returns instance of IrDA class descriptor, or NULL if not found
1611 *
1612 * The class descriptor is some extra info that IrDA USB devices will
1613 * offer to us, describing their IrDA characteristics. We will use that in
1614 * irda_usb_init_qos()
1615 */
1616 static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
1617 {
1618 struct usb_device *dev = interface_to_usbdev (intf);
1619 struct irda_class_desc *desc;
1620 int ret;
1621
1622 desc = kmalloc(sizeof (*desc), GFP_KERNEL);
1623 if (desc == NULL)
1624 return NULL;
1625 memset(desc, 0, sizeof(*desc));
1626
1627 /* USB-IrDA class spec 1.0:
1628 * 6.1.3: Standard "Get Descriptor" Device Request is not
1629 * appropriate to retrieve class-specific descriptor
1630 * 6.2.5: Class Specific "Get Class Descriptor" Interface Request
1631 * is mandatory and returns the USB-IrDA class descriptor
1632 */
1633
1634 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
1635 IU_REQ_GET_CLASS_DESC,
1636 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1637 0, intf->altsetting->desc.bInterfaceNumber, desc,
1638 sizeof(*desc), 500);
1639
1640 IRDA_DEBUG(1, "%s(), ret=%d\n", __FUNCTION__, ret);
1641 if (ret < sizeof(*desc)) {
1642 IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n",
1643 (ret<0) ? "failed" : "too short", ret);
1644 }
1645 else if (desc->bDescriptorType != USB_DT_IRDA) {
1646 IRDA_WARNING("usb-irda: bad class_descriptor type\n");
1647 }
1648 else {
1649 #ifdef IU_DUMP_CLASS_DESC
1650 irda_usb_dump_class_desc(desc);
1651 #endif /* IU_DUMP_CLASS_DESC */
1652
1653 return desc;
1654 }
1655 kfree(desc);
1656 return NULL;
1657 }
1658
1659 /*********************** USB DEVICE CALLBACKS ***********************/
1660 /*
1661 * Main calls from the USB subsystem.
1662 * Mostly registering a new irda-usb device and removing it....
1663 */
1664
1665 /*------------------------------------------------------------------*/
1666 /*
1667 * This routine is called by the USB subsystem for each new device
1668 * in the system. We need to check if the device is ours, and in
1669 * this case start handling it.
1670 * The USB layer protect us from reentrancy (via BKL), so we don't need
1671 * to spinlock in there... Jean II
1672 */
1673 static int irda_usb_probe(struct usb_interface *intf,
1674 const struct usb_device_id *id)
1675 {
1676 struct net_device *net;
1677 struct usb_device *dev = interface_to_usbdev(intf);
1678 struct irda_usb_cb *self = NULL;
1679 struct usb_host_interface *interface;
1680 struct irda_class_desc *irda_desc;
1681 int ret = -ENOMEM;
1682 int i; /* Driver instance index / Rx URB index */
1683
1684 /* Note : the probe make sure to call us only for devices that
1685 * matches the list of dongle (top of the file). So, we
1686 * don't need to check if the dongle is really ours.
1687 * Jean II */
1688
1689 IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
1690 dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1691 le16_to_cpu(dev->descriptor.idProduct));
1692
1693 net = alloc_irdadev(sizeof(*self));
1694 if (!net)
1695 goto err_out;
1696
1697 SET_MODULE_OWNER(net);
1698 SET_NETDEV_DEV(net, &intf->dev);
1699 self = net->priv;
1700 self->netdev = net;
1701 spin_lock_init(&self->lock);
1702 init_timer(&self->rx_defer_timer);
1703
1704 self->capability = id->driver_info;
1705 self->needspatch = ((self->capability & IUC_STIR_4210) != 0) ;
1706
1707 /* Create all of the needed urbs */
1708 if (self->capability & IUC_STIR_4210) {
1709 self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
1710 self->header_length = USB_IRDA_SIGMATEL_HEADER;
1711 } else {
1712 self->max_rx_urb = IU_MAX_RX_URBS;
1713 self->header_length = USB_IRDA_HEADER;
1714 }
1715
1716 self->rx_urb = kzalloc(self->max_rx_urb * sizeof(struct urb *),
1717 GFP_KERNEL);
1718
1719 for (i = 0; i < self->max_rx_urb; i++) {
1720 self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1721 if (!self->rx_urb[i]) {
1722 goto err_out_1;
1723 }
1724 }
1725 self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1726 if (!self->tx_urb) {
1727 goto err_out_1;
1728 }
1729 self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1730 if (!self->speed_urb) {
1731 goto err_out_2;
1732 }
1733
1734 /* Is this really necessary? (no, except maybe for broken devices) */
1735 if (usb_reset_configuration (dev) < 0) {
1736 err("reset_configuration failed");
1737 ret = -EIO;
1738 goto err_out_3;
1739 }
1740
1741 /* Is this really necessary? */
1742 /* Note : some driver do hardcode the interface number, some others
1743 * specify an alternate, but very few driver do like this.
1744 * Jean II */
1745 ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1746 IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret);
1747 switch (ret) {
1748 case 0:
1749 break;
1750 case -EPIPE: /* -EPIPE = -32 */
1751 /* Martin Diehl says if we get a -EPIPE we should
1752 * be fine and we don't need to do a usb_clear_halt().
1753 * - Jean II */
1754 IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __FUNCTION__);
1755 break;
1756 default:
1757 IRDA_DEBUG(0, "%s(), Unknown error %d\n", __FUNCTION__, ret);
1758 ret = -EIO;
1759 goto err_out_3;
1760 }
1761
1762 /* Find our endpoints */
1763 interface = intf->cur_altsetting;
1764 if(!irda_usb_parse_endpoints(self, interface->endpoint,
1765 interface->desc.bNumEndpoints)) {
1766 IRDA_ERROR("%s(), Bogus endpoints...\n", __FUNCTION__);
1767 ret = -EIO;
1768 goto err_out_3;
1769 }
1770
1771 self->usbdev = dev;
1772
1773 /* Find IrDA class descriptor */
1774 irda_desc = irda_usb_find_class_desc(intf);
1775 ret = -ENODEV;
1776 if (irda_desc == NULL)
1777 goto err_out_3;
1778
1779 if (self->needspatch) {
1780 ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
1781 0x02, 0x40, 0, 0, NULL, 0, 500);
1782 if (ret < 0) {
1783 IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
1784 goto err_out_3;
1785 } else {
1786 mdelay(10);
1787 }
1788 }
1789
1790 self->irda_desc = irda_desc;
1791 self->present = 1;
1792 self->netopen = 0;
1793 self->usbintf = intf;
1794
1795 /* Allocate the buffer for speed changes */
1796 /* Don't change this buffer size and allocation without doing
1797 * some heavy and complete testing. Don't ask why :-(
1798 * Jean II */
1799 self->speed_buff = (char *) kmalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1800 if (self->speed_buff == NULL)
1801 goto err_out_3;
1802
1803 memset(self->speed_buff, 0, IRDA_USB_SPEED_MTU);
1804
1805 ret = irda_usb_open(self);
1806 if (ret)
1807 goto err_out_4;
1808
1809 IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
1810 usb_set_intfdata(intf, self);
1811
1812 if (self->needspatch) {
1813 /* Now we fetch and upload the firmware patch */
1814 ret = stir421x_patch_device(self);
1815 self->needspatch = (ret < 0);
1816 if (ret < 0) {
1817 printk("patch_device failed\n");
1818 goto err_out_5;
1819 }
1820
1821 /* replace IrDA class descriptor with what patched device is now reporting */
1822 irda_desc = irda_usb_find_class_desc (self->usbintf);
1823 if (irda_desc == NULL) {
1824 ret = -ENODEV;
1825 goto err_out_5;
1826 }
1827 if (self->irda_desc)
1828 kfree (self->irda_desc);
1829 self->irda_desc = irda_desc;
1830 irda_usb_init_qos(self);
1831 }
1832
1833 return 0;
1834
1835 err_out_5:
1836 unregister_netdev(self->netdev);
1837 err_out_4:
1838 kfree(self->speed_buff);
1839 err_out_3:
1840 /* Free all urbs that we may have created */
1841 usb_free_urb(self->speed_urb);
1842 err_out_2:
1843 usb_free_urb(self->tx_urb);
1844 err_out_1:
1845 for (i = 0; i < self->max_rx_urb; i++) {
1846 if (self->rx_urb[i])
1847 usb_free_urb(self->rx_urb[i]);
1848 }
1849 free_netdev(net);
1850 err_out:
1851 return ret;
1852 }
1853
1854 /*------------------------------------------------------------------*/
1855 /*
1856 * The current irda-usb device is removed, the USB layer tell us
1857 * to shut it down...
1858 * One of the constraints is that when we exit this function,
1859 * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1860 * Most other subsystem allow you to destroy the instance at a time
1861 * when it's convenient to you, to postpone it to a later date, but
1862 * not the USB subsystem.
1863 * So, we must make bloody sure that everything gets deactivated.
1864 * Jean II
1865 */
1866 static void irda_usb_disconnect(struct usb_interface *intf)
1867 {
1868 unsigned long flags;
1869 struct irda_usb_cb *self = usb_get_intfdata(intf);
1870 int i;
1871
1872 IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
1873
1874 usb_set_intfdata(intf, NULL);
1875 if (!self)
1876 return;
1877
1878 /* Make sure that the Tx path is not executing. - Jean II */
1879 spin_lock_irqsave(&self->lock, flags);
1880
1881 /* Oups ! We are not there any more.
1882 * This will stop/desactivate the Tx path. - Jean II */
1883 self->present = 0;
1884
1885 /* Kill defered Rx URB */
1886 del_timer(&self->rx_defer_timer);
1887
1888 /* We need to have irq enabled to unlink the URBs. That's OK,
1889 * at this point the Tx path is gone - Jean II */
1890 spin_unlock_irqrestore(&self->lock, flags);
1891
1892 /* Hum... Check if networking is still active (avoid races) */
1893 if((self->netopen) || (self->irlap)) {
1894 /* Accept no more transmissions */
1895 /*netif_device_detach(self->netdev);*/
1896 netif_stop_queue(self->netdev);
1897 /* Stop all the receive URBs. Must be synchronous. */
1898 for (i = 0; i < self->max_rx_urb; i++)
1899 usb_kill_urb(self->rx_urb[i]);
1900 /* Cancel Tx and speed URB.
1901 * Make sure it's synchronous to avoid races. */
1902 usb_kill_urb(self->tx_urb);
1903 usb_kill_urb(self->speed_urb);
1904 }
1905
1906 /* Cleanup the device stuff */
1907 irda_usb_close(self);
1908 /* No longer attached to USB bus */
1909 self->usbdev = NULL;
1910 self->usbintf = NULL;
1911
1912 /* Clean up our urbs */
1913 for (i = 0; i < self->max_rx_urb; i++)
1914 usb_free_urb(self->rx_urb[i]);
1915 kfree(self->rx_urb);
1916 /* Clean up Tx and speed URB */
1917 usb_free_urb(self->tx_urb);
1918 usb_free_urb(self->speed_urb);
1919
1920 /* Free self and network device */
1921 free_netdev(self->netdev);
1922 IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __FUNCTION__);
1923 }
1924
1925 /*------------------------------------------------------------------*/
1926 /*
1927 * USB device callbacks
1928 */
1929 static struct usb_driver irda_driver = {
1930 .name = "irda-usb",
1931 .probe = irda_usb_probe,
1932 .disconnect = irda_usb_disconnect,
1933 .id_table = dongles,
1934 };
1935
1936 /************************* MODULE CALLBACKS *************************/
1937 /*
1938 * Deal with module insertion/removal
1939 * Mostly tell USB about our existence
1940 */
1941
1942 /*------------------------------------------------------------------*/
1943 /*
1944 * Module insertion
1945 */
1946 static int __init usb_irda_init(void)
1947 {
1948 int ret;
1949
1950 ret = usb_register(&irda_driver);
1951 if (ret < 0)
1952 return ret;
1953
1954 IRDA_MESSAGE("USB IrDA support registered\n");
1955 return 0;
1956 }
1957 module_init(usb_irda_init);
1958
1959 /*------------------------------------------------------------------*/
1960 /*
1961 * Module removal
1962 */
1963 static void __exit usb_irda_cleanup(void)
1964 {
1965 /* Deregister the driver and remove all pending instances */
1966 usb_deregister(&irda_driver);
1967 }
1968 module_exit(usb_irda_cleanup);
1969
1970 /*------------------------------------------------------------------*/
1971 /*
1972 * Module parameters
1973 */
1974 module_param(qos_mtt_bits, int, 0);
1975 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
1976 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>");
1977 MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
1978 MODULE_LICENSE("GPL");
Linux with added FPC-III support