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