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