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