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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*****************************************************************************
2 *
3 * Filename: irda-usb.c
Samuel Ortiz137dc022006-04-05 22:39:14 -07004 * Version: 0.10
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * 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>
Samuel Ortiz137dc022006-04-05 22:39:14 -070012 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 *
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>
Samuel Ortiz137dc022006-04-05 22:39:14 -070067#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
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 },
Samuel Ortiz137dc022006-04-05 22:39:14 -070085 /* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -070086 { 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 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS |
Samuel Ortiz137dc022006-04-05 22:39:14 -070090 USB_DEVICE_ID_MATCH_INT_SUBCLASS,
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 .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
Samuel Ortiz137dc022006-04-05 22:39:14 -0700110static void irda_usb_init_qos(struct irda_usb_cb *self) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111static 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 int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *dev);
115static int irda_usb_open(struct irda_usb_cb *self);
116static void irda_usb_close(struct irda_usb_cb *self);
David Howells7d12e782006-10-05 14:55:46 +0100117static void speed_bulk_callback(struct urb *urb);
118static void write_bulk_callback(struct urb *urb);
119static void irda_usb_receive(struct urb *urb);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800120static void irda_usb_rx_defer_expired(unsigned long data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121static 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
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{
Samuel Ortiz137dc022006-04-05 22:39:14 -0700152 /* Here we check if we have an STIR421x chip,
153 * and if either speed or xbofs (or both) needs
154 * to be changed.
155 */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700156 if (self->capability & IUC_STIR421X &&
Samuel Ortiz137dc022006-04-05 22:39:14 -0700157 ((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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 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) */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700179 IRDA_DEBUG(2, "%s(), not changing speed yet\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 *header = 0;
181 return;
182 }
183
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700184 IRDA_DEBUG(2, "%s(), changing speed to %d\n", __func__, self->new_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 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;
Samuel Ortiz137dc022006-04-05 22:39:14 -0700219 case 16000000:
220 *header = SPEED_16000000;
221 self->new_xbofs = 0;
222 break;
223 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 } else
225 /* No change */
226 *header = 0;
227
228 /* Set the negotiated additional XBOFS */
229 if (self->new_xbofs != -1) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700230 IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __func__, self->new_xbofs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 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
Samuel Ortiz137dc022006-04-05 22:39:14 -0700267/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293/*------------------------------------------------------------------*/
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
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700304 IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 self->new_speed, self->new_xbofs);
306
307 /* Grab the speed URB */
308 urb = self->speed_urb;
309 if (urb->status != 0) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700310 IRDA_WARNING("%s(), URB still in use!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 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
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700320 if (self->capability & IUC_STIR421X) {
Samuel Ortiz137dc022006-04-05 22:39:14 -0700321 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 /* 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);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700331 urb->transfer_buffer_length = self->header_length;
Alan Sternb375a042005-07-29 16:11:07 -0400332 urb->transfer_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
334 /* Irq disabled -> GFP_ATOMIC */
335 if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700336 IRDA_WARNING("%s(), failed Speed URB\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 }
338}
339
340/*------------------------------------------------------------------*/
341/*
342 * Speed URB callback
343 * Now, we can only get called for the speed URB.
344 */
David Howells7d12e782006-10-05 14:55:46 +0100345static void speed_bulk_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346{
347 struct irda_usb_cb *self = urb->context;
348
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700349 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
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 */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700359 IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __func__, urb->status, urb->transfer_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
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 commited 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 int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *netdev)
385{
Wang Chen4cf16532008-11-12 23:38:14 -0800386 struct irda_usb_cb *self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 struct urb *urb = self->tx_urb;
388 unsigned long flags;
389 s32 speed;
390 s16 xbofs;
391 int res, mtt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700393 IRDA_DEBUG(4, "%s() on %s\n", __func__, netdev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
395 netif_stop_queue(netdev);
396
397 /* Protect us from USB callbacks, net watchdog and else. */
398 spin_lock_irqsave(&self->lock, flags);
399
400 /* Check if the device is still there.
401 * We need to check self->present under the spinlock because
402 * of irda_usb_disconnect() is synchronous - Jean II */
403 if (!self->present) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700404 IRDA_DEBUG(0, "%s(), Device is gone...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 goto drop;
406 }
407
408 /* Check if we need to change the number of xbofs */
409 xbofs = irda_get_next_xbofs(skb);
410 if ((xbofs != self->xbofs) && (xbofs != -1)) {
411 self->new_xbofs = xbofs;
412 }
413
414 /* Check if we need to change the speed */
415 speed = irda_get_next_speed(skb);
416 if ((speed != self->speed) && (speed != -1)) {
417 /* Set the desired speed */
418 self->new_speed = speed;
419
420 /* Check for empty frame */
421 if (!skb->len) {
422 /* IrLAP send us an empty frame to make us change the
423 * speed. Changing speed with the USB adapter is in
424 * fact sending an empty frame to the adapter, so we
425 * could just let the present function do its job.
426 * However, we would wait for min turn time,
427 * do an extra memcpy and increment packet counters...
428 * Jean II */
429 irda_usb_change_speed_xbofs(self);
430 netdev->trans_start = jiffies;
431 /* Will netif_wake_queue() in callback */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 goto drop;
433 }
434 }
435
436 if (urb->status != 0) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700437 IRDA_WARNING("%s(), URB still in use!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 goto drop;
439 }
440
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -0300441 skb_copy_from_linear_data(skb, self->tx_buff + self->header_length, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
443 /* Change setting for next frame */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700444 if (self->capability & IUC_STIR421X) {
Samuel Ortiz137dc022006-04-05 22:39:14 -0700445 __u8 turnaround_time;
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800446 __u8* frame = self->tx_buff;
Samuel Ortiz137dc022006-04-05 22:39:14 -0700447 turnaround_time = get_turnaround_time( skb );
Samuel Ortiz137dc022006-04-05 22:39:14 -0700448 irda_usb_build_header(self, frame, 0);
449 frame[2] = turnaround_time;
450 if ((skb->len != 0) &&
451 ((skb->len % 128) == 0) &&
452 ((skb->len % 512) != 0)) {
453 /* add extra byte for special SigmaTel feature */
454 frame[1] = 1;
455 skb_put(skb, 1);
456 } else {
457 frame[1] = 0;
458 }
459 } else {
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800460 irda_usb_build_header(self, self->tx_buff, 0);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700461 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
463 /* FIXME: Make macro out of this one */
464 ((struct irda_skb_cb *)skb->cb)->context = self;
465
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800466 usb_fill_bulk_urb(urb, self->usbdev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800468 self->tx_buff, skb->len + self->header_length,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 write_bulk_callback, skb);
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 /* This flag (URB_ZERO_PACKET) indicates that what we send is not
472 * a continuous stream of data but separate packets.
473 * In this case, the USB layer will insert an empty USB frame (TD)
474 * after each of our packets that is exact multiple of the frame size.
475 * This is how the dongle will detect the end of packet - Jean II */
Alan Sternb375a042005-07-29 16:11:07 -0400476 urb->transfer_flags = URB_ZERO_PACKET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478 /* Generate min turn time. FIXME: can we do better than this? */
479 /* Trying to a turnaround time at this level is trying to measure
480 * processor clock cycle with a wrist-watch, approximate at best...
481 *
482 * What we know is the last time we received a frame over USB.
483 * Due to latency over USB that depend on the USB load, we don't
484 * know when this frame was received over IrDA (a few ms before ?)
485 * Then, same story for our outgoing frame...
486 *
487 * In theory, the USB dongle is supposed to handle the turnaround
488 * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's
489 * why this code is enabled only for dongles that doesn't meet
490 * the spec.
491 * Jean II */
492 if (self->capability & IUC_NO_TURN) {
493 mtt = irda_get_mtt(skb);
494 if (mtt) {
495 int diff;
496 do_gettimeofday(&self->now);
497 diff = self->now.tv_usec - self->stamp.tv_usec;
498#ifdef IU_USB_MIN_RTT
499 /* Factor in USB delays -> Get rid of udelay() that
500 * would be lost in the noise - Jean II */
501 diff += IU_USB_MIN_RTT;
502#endif /* IU_USB_MIN_RTT */
503 /* If the usec counter did wraparound, the diff will
504 * go negative (tv_usec is a long), so we need to
505 * correct it by one second. Jean II */
506 if (diff < 0)
507 diff += 1000000;
508
509 /* Check if the mtt is larger than the time we have
510 * already used by all the protocol processing
511 */
512 if (mtt > diff) {
513 mtt -= diff;
514 if (mtt > 1000)
515 mdelay(mtt/1000);
516 else
517 udelay(mtt);
518 }
519 }
520 }
521
522 /* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
523 if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700524 IRDA_WARNING("%s(), failed Tx URB\n", __func__);
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800525 netdev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 /* Let USB recover : We will catch that in the watchdog */
527 /*netif_start_queue(netdev);*/
528 } else {
529 /* Increment packet stats */
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800530 netdev->stats.tx_packets++;
531 netdev->stats.tx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
533 netdev->trans_start = jiffies;
534 }
535 spin_unlock_irqrestore(&self->lock, flags);
536
537 return 0;
538
539drop:
540 /* Drop silently the skb and exit */
541 dev_kfree_skb(skb);
542 spin_unlock_irqrestore(&self->lock, flags);
Patrick McHardy4bd73ae2009-06-12 03:17:19 +0000543 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544}
545
546/*------------------------------------------------------------------*/
547/*
548 * Note : this function will be called only for tx_urb...
549 */
David Howells7d12e782006-10-05 14:55:46 +0100550static void write_bulk_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551{
552 unsigned long flags;
553 struct sk_buff *skb = urb->context;
554 struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
555
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700556 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 /* We should always have a context */
559 IRDA_ASSERT(self != NULL, return;);
560 /* We should always be called for the speed URB */
561 IRDA_ASSERT(urb == self->tx_urb, return;);
562
563 /* Free up the skb */
564 dev_kfree_skb_any(skb);
565 urb->context = NULL;
566
567 /* Check for timeout and other USB nasties */
568 if (urb->status != 0) {
569 /* I get a lot of -ECONNABORTED = -103 here - Jean II */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700570 IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __func__, urb->status, urb->transfer_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
572 /* Don't do anything here, that might confuse the USB layer,
573 * and we could go in recursion and blow the kernel stack...
574 * Instead, we will wait for irda_usb_net_timeout(), the
575 * network layer watchdog, to fix the situation.
576 * Jean II */
577 /* A reset of the dongle might be welcomed here - Jean II */
578 return;
579 }
580
581 /* urb is now available */
582 //urb->status = 0; -> tested above
583
584 /* Make sure we read self->present properly */
585 spin_lock_irqsave(&self->lock, flags);
586
587 /* If the network is closed, stop everything */
588 if ((!self->netopen) || (!self->present)) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700589 IRDA_DEBUG(0, "%s(), Network is gone...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 spin_unlock_irqrestore(&self->lock, flags);
591 return;
592 }
593
594 /* If changes to speed or xbofs is pending... */
595 if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
596 if ((self->new_speed != self->speed) ||
597 (self->new_xbofs != self->xbofs)) {
598 /* We haven't changed speed yet (because of
599 * IUC_SPEED_BUG), so do it now - Jean II */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700600 IRDA_DEBUG(1, "%s(), Changing speed now...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 irda_usb_change_speed_xbofs(self);
602 } else {
603 /* New speed and xbof is now commited in hardware */
604 self->new_speed = -1;
605 self->new_xbofs = -1;
606 /* Done, waiting for next packet */
607 netif_wake_queue(self->netdev);
608 }
609 } else {
610 /* Otherwise, allow the stack to send more packets */
611 netif_wake_queue(self->netdev);
612 }
613 spin_unlock_irqrestore(&self->lock, flags);
614}
615
616/*------------------------------------------------------------------*/
617/*
618 * Watchdog timer from the network layer.
619 * After a predetermined timeout, if we don't give confirmation that
620 * the packet has been sent (i.e. no call to netif_wake_queue()),
621 * the network layer will call this function.
622 * Note that URB that we submit have also a timeout. When the URB timeout
623 * expire, the normal URB callback is called (write_bulk_callback()).
624 */
625static void irda_usb_net_timeout(struct net_device *netdev)
626{
627 unsigned long flags;
Wang Chen4cf16532008-11-12 23:38:14 -0800628 struct irda_usb_cb *self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 struct urb *urb;
630 int done = 0; /* If we have made any progress */
631
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700632 IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 IRDA_ASSERT(self != NULL, return;);
634
635 /* Protect us from USB callbacks, net Tx and else. */
636 spin_lock_irqsave(&self->lock, flags);
637
638 /* self->present *MUST* be read under spinlock */
639 if (!self->present) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700640 IRDA_WARNING("%s(), device not present!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 netif_stop_queue(netdev);
642 spin_unlock_irqrestore(&self->lock, flags);
643 return;
644 }
645
646 /* Check speed URB */
647 urb = self->speed_urb;
648 if (urb->status != 0) {
649 IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
650
651 switch (urb->status) {
652 case -EINPROGRESS:
653 usb_unlink_urb(urb);
654 /* Note : above will *NOT* call netif_wake_queue()
655 * in completion handler, we will come back here.
656 * Jean II */
657 done = 1;
658 break;
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700659 case -ECONNRESET:
660 case -ENOENT: /* urb unlinked by us */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 default: /* ??? - Play safe */
662 urb->status = 0;
663 netif_wake_queue(self->netdev);
664 done = 1;
665 break;
666 }
667 }
668
669 /* Check Tx URB */
670 urb = self->tx_urb;
671 if (urb->status != 0) {
672 struct sk_buff *skb = urb->context;
673
674 IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
675
676 /* Increase error count */
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800677 netdev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
679#ifdef IU_BUG_KICK_TIMEOUT
680 /* Can't be a bad idea to reset the speed ;-) - Jean II */
681 if(self->new_speed == -1)
682 self->new_speed = self->speed;
683 if(self->new_xbofs == -1)
684 self->new_xbofs = self->xbofs;
685 irda_usb_change_speed_xbofs(self);
686#endif /* IU_BUG_KICK_TIMEOUT */
687
688 switch (urb->status) {
689 case -EINPROGRESS:
690 usb_unlink_urb(urb);
691 /* Note : above will *NOT* call netif_wake_queue()
692 * in completion handler, because urb->status will
693 * be -ENOENT. We will fix that at the next watchdog,
694 * leaving more time to USB to recover...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 * Jean II */
696 done = 1;
697 break;
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700698 case -ECONNRESET:
699 case -ENOENT: /* urb unlinked by us */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 default: /* ??? - Play safe */
701 if(skb != NULL) {
702 dev_kfree_skb_any(skb);
703 urb->context = NULL;
704 }
705 urb->status = 0;
706 netif_wake_queue(self->netdev);
707 done = 1;
708 break;
709 }
710 }
711 spin_unlock_irqrestore(&self->lock, flags);
712
713 /* Maybe we need a reset */
714 /* Note : Some drivers seem to use a usb_set_interface() when they
715 * need to reset the hardware. Hum...
716 */
717
718 /* if(done == 0) */
719}
720
721/************************* RECEIVE ROUTINES *************************/
722/*
723 * Receive packets from the USB layer stack and pass them to the IrDA stack.
724 * Try to work around USB failures...
725 */
726
727/*
728 * Note :
729 * Some of you may have noticed that most dongle have an interrupt in pipe
730 * that we don't use. Here is the little secret...
731 * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
732 * in every USB frame. This is unnecessary overhead.
733 * The interrupt in pipe will generate an event every time a packet is
734 * received. Reading an interrupt pipe adds minimal overhead, but has some
735 * latency (~1ms).
736 * If we are connected (speed != 9600), we want to minimise latency, so
737 * we just always hang the Rx URB and ignore the interrupt.
738 * If we are not connected (speed == 9600), there is usually no Rx traffic,
739 * and we want to minimise the USB overhead. In this case we should wait
740 * on the interrupt pipe and hang the Rx URB only when an interrupt is
741 * received.
742 * Jean II
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800743 *
744 * Note : don't read the above as what we are currently doing, but as
745 * something we could do with KC dongle. Also don't forget that the
746 * interrupt pipe is not part of the original standard, so this would
747 * need to be optional...
748 * Jean II
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 */
750
751/*------------------------------------------------------------------*/
752/*
753 * Submit a Rx URB to the USB layer to handle reception of a frame
754 * Mostly called by the completion callback of the previous URB.
755 *
756 * Jean II
757 */
758static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
759{
760 struct irda_skb_cb *cb;
761 int ret;
762
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700763 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764
765 /* This should never happen */
766 IRDA_ASSERT(skb != NULL, return;);
767 IRDA_ASSERT(urb != NULL, return;);
768
769 /* Save ourselves in the skb */
770 cb = (struct irda_skb_cb *) skb->cb;
771 cb->context = self;
772
773 /* Reinitialize URB */
774 usb_fill_bulk_urb(urb, self->usbdev,
775 usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep),
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800776 skb->data, IRDA_SKB_MAX_MTU,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 irda_usb_receive, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 urb->status = 0;
779
780 /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
781 ret = usb_submit_urb(urb, GFP_ATOMIC);
782 if (ret) {
783 /* If this ever happen, we are in deep s***.
784 * Basically, the Rx path will stop... */
785 IRDA_WARNING("%s(), Failed to submit Rx URB %d\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700786 __func__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 }
788}
789
790/*------------------------------------------------------------------*/
791/*
792 * Function irda_usb_receive(urb)
793 *
794 * Called by the USB subsystem when a frame has been received
795 *
796 */
David Howells7d12e782006-10-05 14:55:46 +0100797static void irda_usb_receive(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798{
799 struct sk_buff *skb = (struct sk_buff *) urb->context;
800 struct irda_usb_cb *self;
801 struct irda_skb_cb *cb;
802 struct sk_buff *newskb;
803 struct sk_buff *dataskb;
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800804 struct urb *next_urb;
Eugene Teoda818172006-03-15 14:57:19 -0800805 unsigned int len, docopy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700807 IRDA_DEBUG(2, "%s(), len=%d\n", __func__, urb->actual_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
809 /* Find ourselves */
810 cb = (struct irda_skb_cb *) skb->cb;
811 IRDA_ASSERT(cb != NULL, return;);
812 self = (struct irda_usb_cb *) cb->context;
813 IRDA_ASSERT(self != NULL, return;);
814
815 /* If the network is closed or the device gone, stop everything */
816 if ((!self->netopen) || (!self->present)) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700817 IRDA_DEBUG(0, "%s(), Network is gone!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 /* Don't re-submit the URB : will stall the Rx path */
819 return;
820 }
821
822 /* Check the status */
823 if (urb->status != 0) {
824 switch (urb->status) {
825 case -EILSEQ:
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800826 self->netdev->stats.rx_crc_errors++;
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800827 /* Also precursor to a hot-unplug on UHCI. */
828 /* Fallthrough... */
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700829 case -ECONNRESET:
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800830 /* Random error, if I remember correctly */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 /* uhci_cleanup_unlink() is going to kill the Rx
832 * URB just after we return. No problem, at this
833 * point the URB will be idle ;-) - Jean II */
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700834 case -ESHUTDOWN:
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800835 /* That's usually a hot-unplug. Submit will fail... */
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700836 case -ETIME:
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800837 /* Usually precursor to a hot-unplug on OHCI. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 default:
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800839 self->netdev->stats.rx_errors++;
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700840 IRDA_DEBUG(0, "%s(), RX status %d, transfer_flags 0x%04X \n", __func__, urb->status, urb->transfer_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 break;
842 }
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800843 /* If we received an error, we don't want to resubmit the
844 * Rx URB straight away but to give the USB layer a little
845 * bit of breathing room.
846 * We are in the USB thread context, therefore there is a
847 * danger of recursion (new URB we submit fails, we come
848 * back here).
849 * With recent USB stack (2.6.15+), I'm seeing that on
850 * hot unplug of the dongle...
851 * Lowest effective timer is 10ms...
852 * Jean II */
853 self->rx_defer_timer.function = &irda_usb_rx_defer_expired;
854 self->rx_defer_timer.data = (unsigned long) urb;
855 mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000));
856 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 }
858
859 /* Check for empty frames */
Samuel Ortiz137dc022006-04-05 22:39:14 -0700860 if (urb->actual_length <= self->header_length) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700861 IRDA_WARNING("%s(), empty frame!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 goto done;
863 }
864
865 /*
866 * Remember the time we received this frame, so we can
867 * reduce the min turn time a bit since we will know
868 * how much time we have used for protocol processing
869 */
870 do_gettimeofday(&self->stamp);
871
872 /* Check if we need to copy the data to a new skb or not.
873 * For most frames, we use ZeroCopy and pass the already
874 * allocated skb up the stack.
875 * If the frame is small, it is more efficient to copy it
876 * to save memory (copy will be fast anyway - that's
877 * called Rx-copy-break). Jean II */
878 docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
879
880 /* Allocate a new skb */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700881 if (self->capability & IUC_STIR421X)
882 newskb = dev_alloc_skb(docopy ? urb->actual_length :
883 IRDA_SKB_MAX_MTU +
884 USB_IRDA_STIR421X_HEADER);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700885 else
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700886 newskb = dev_alloc_skb(docopy ? urb->actual_length :
887 IRDA_SKB_MAX_MTU);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700888
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 if (!newskb) {
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800890 self->netdev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 /* We could deliver the current skb, but this would stall
892 * the Rx path. Better drop the packet... Jean II */
893 goto done;
894 }
895
896 /* Make sure IP header get aligned (IrDA header is 5 bytes) */
897 /* But IrDA-USB header is 1 byte. Jean II */
898 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
899
900 if(docopy) {
901 /* Copy packet, so we can recycle the original */
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -0300902 skb_copy_from_linear_data(skb, newskb->data, urb->actual_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 /* Deliver this new skb */
904 dataskb = newskb;
905 /* And hook the old skb to the URB
906 * Note : we don't need to "clean up" the old skb,
907 * as we never touched it. Jean II */
908 } else {
909 /* We are using ZeroCopy. Deliver old skb */
910 dataskb = skb;
911 /* And hook the new skb to the URB */
912 skb = newskb;
913 }
914
915 /* Set proper length on skb & remove USB-IrDA header */
916 skb_put(dataskb, urb->actual_length);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700917 skb_pull(dataskb, self->header_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
919 /* Ask the networking layer to queue the packet for the IrDA stack */
920 dataskb->dev = self->netdev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -0700921 skb_reset_mac_header(dataskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 dataskb->protocol = htons(ETH_P_IRDA);
Eugene Teoda818172006-03-15 14:57:19 -0800923 len = dataskb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 netif_rx(dataskb);
925
926 /* Keep stats up to date */
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800927 self->netdev->stats.rx_bytes += len;
928 self->netdev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
930done:
931 /* Note : at this point, the URB we've just received (urb)
932 * is still referenced by the USB layer. For example, if we
933 * have received a -ECONNRESET, uhci_cleanup_unlink() will
934 * continue to process it (in fact, cleaning it up).
935 * If we were to submit this URB, disaster would ensue.
936 * Therefore, we submit our idle URB, and put this URB in our
937 * idle slot....
938 * Jean II */
939 /* Note : with this scheme, we could submit the idle URB before
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800940 * processing the Rx URB. I don't think it would buy us anything as
941 * we are running in the USB thread context. Jean II */
942 next_urb = self->idle_rx_urb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 /* Recycle Rx URB : Now, the idle URB is the present one */
945 urb->context = NULL;
946 self->idle_rx_urb = urb;
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800947
948 /* Submit the idle URB to replace the URB we've just received.
949 * Do it last to avoid race conditions... Jean II */
950 irda_usb_submit(self, skb, next_urb);
951}
952
953/*------------------------------------------------------------------*/
954/*
955 * In case of errors, we want the USB layer to have time to recover.
956 * Now, it is time to resubmit ouur Rx URB...
957 */
958static void irda_usb_rx_defer_expired(unsigned long data)
959{
960 struct urb *urb = (struct urb *) data;
961 struct sk_buff *skb = (struct sk_buff *) urb->context;
962 struct irda_usb_cb *self;
963 struct irda_skb_cb *cb;
964 struct urb *next_urb;
965
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700966 IRDA_DEBUG(2, "%s()\n", __func__);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800967
968 /* Find ourselves */
969 cb = (struct irda_skb_cb *) skb->cb;
970 IRDA_ASSERT(cb != NULL, return;);
971 self = (struct irda_usb_cb *) cb->context;
972 IRDA_ASSERT(self != NULL, return;);
973
974 /* Same stuff as when Rx is done, see above... */
975 next_urb = self->idle_rx_urb;
976 urb->context = NULL;
977 self->idle_rx_urb = urb;
978 irda_usb_submit(self, skb, next_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979}
980
981/*------------------------------------------------------------------*/
982/*
983 * Callbak from IrDA layer. IrDA wants to know if we have
984 * started receiving anything.
985 */
986static int irda_usb_is_receiving(struct irda_usb_cb *self)
987{
988 /* Note : because of the way UHCI works, it's almost impossible
989 * to get this info. The Controller DMA directly to memory and
990 * signal only when the whole frame is finished. To know if the
991 * first TD of the URB has been filled or not seems hard work...
992 *
993 * The other solution would be to use the "receiving" command
994 * on the default decriptor with a usb_control_msg(), but that
995 * would add USB traffic and would return result only in the
996 * next USB frame (~1ms).
997 *
998 * I've been told that current dongles send status info on their
999 * interrupt endpoint, and that's what the Windows driver uses
1000 * to know this info. Unfortunately, this is not yet in the spec...
1001 *
1002 * Jean II
1003 */
1004
1005 return 0; /* For now */
1006}
1007
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001008#define STIR421X_PATCH_PRODUCT_VER "Product Version: "
1009#define STIR421X_PATCH_STMP_TAG "STMP"
1010#define STIR421X_PATCH_CODE_OFFSET 512 /* patch image starts before here */
1011/* marks end of patch file header (PC DOS text file EOF character) */
1012#define STIR421X_PATCH_END_OF_HDR_TAG 0x1A
1013#define STIR421X_PATCH_BLOCK_SIZE 1023
Samuel Ortiz137dc022006-04-05 22:39:14 -07001014
1015/*
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001016 * Function stir421x_fwupload (struct irda_usb_cb *self,
1017 * unsigned char *patch,
1018 * const unsigned int patch_len)
1019 *
1020 * Upload firmware code to SigmaTel 421X IRDA-USB dongle
Samuel Ortiz137dc022006-04-05 22:39:14 -07001021 */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001022static int stir421x_fw_upload(struct irda_usb_cb *self,
David Woodhouseafd636e2008-05-24 00:10:26 +01001023 const unsigned char *patch,
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001024 const unsigned int patch_len)
Samuel Ortiz137dc022006-04-05 22:39:14 -07001025{
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001026 int ret = -ENOMEM;
1027 int actual_len = 0;
1028 unsigned int i;
1029 unsigned int block_size = 0;
1030 unsigned char *patch_block;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001031
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001032 patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL);
1033 if (patch_block == NULL)
1034 return -ENOMEM;
1035
1036 /* break up patch into 1023-byte sections */
1037 for (i = 0; i < patch_len; i += block_size) {
1038 block_size = patch_len - i;
1039
1040 if (block_size > STIR421X_PATCH_BLOCK_SIZE)
1041 block_size = STIR421X_PATCH_BLOCK_SIZE;
1042
1043 /* upload the patch section */
1044 memcpy(patch_block, patch + i, block_size);
1045
1046 ret = usb_bulk_msg(self->usbdev,
1047 usb_sndbulkpipe(self->usbdev,
1048 self->bulk_out_ep),
1049 patch_block, block_size,
1050 &actual_len, msecs_to_jiffies(500));
1051 IRDA_DEBUG(3,"%s(): Bulk send %u bytes, ret=%d\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001052 __func__, actual_len, ret);
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001053
1054 if (ret < 0)
1055 break;
Nigel Williams2e360d812007-03-16 20:28:36 -07001056
1057 mdelay(10);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001058 }
1059
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001060 kfree(patch_block);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001061
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001062 return ret;
1063 }
Samuel Ortiz137dc022006-04-05 22:39:14 -07001064
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001065/*
1066 * Function stir421x_patch_device(struct irda_usb_cb *self)
1067 *
1068 * Get a firmware code from userspase using hotplug request_firmware() call
1069 */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001070static int stir421x_patch_device(struct irda_usb_cb *self)
1071{
David Woodhouseafd636e2008-05-24 00:10:26 +01001072 unsigned int i;
1073 int ret;
Jos-Vicente Gilabert2950e952009-01-14 20:55:00 -08001074 char stir421x_fw_name[12];
David Woodhouseafd636e2008-05-24 00:10:26 +01001075 const struct firmware *fw;
1076 const unsigned char *fw_version_ptr; /* pointer to version string */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001077 unsigned long fw_version = 0;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001078
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001079 /*
1080 * Known firmware patch file names for STIR421x dongles
1081 * are "42101001.sb" or "42101002.sb"
1082 */
1083 sprintf(stir421x_fw_name, "4210%4X.sb",
1084 self->usbdev->descriptor.bcdDevice);
1085 ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
1086 if (ret < 0)
1087 return ret;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001088
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001089 /* We get a patch from userspace */
Andrew Mortoned6a2092006-06-25 05:49:19 -07001090 IRDA_MESSAGE("%s(): Received firmware %s (%zu bytes)\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001091 __func__, stir421x_fw_name, fw->size);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001092
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001093 ret = -EINVAL;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001094
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001095 /* Get the bcd product version */
1096 if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
1097 sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
1098 fw_version_ptr = fw->data +
1099 sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001100
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001101 /* Let's check if the product version is dotted */
1102 if (fw_version_ptr[3] == '.' &&
1103 fw_version_ptr[7] == '.') {
1104 unsigned long major, minor, build;
1105 major = simple_strtoul(fw_version_ptr, NULL, 10);
1106 minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
1107 build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001108
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001109 fw_version = (major << 12)
1110 + (minor << 8)
1111 + ((build / 10) << 4)
1112 + (build % 10);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001113
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001114 IRDA_DEBUG(3, "%s(): Firmware Product version %ld\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001115 __func__, fw_version);
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001116 }
1117 }
Samuel Ortiz137dc022006-04-05 22:39:14 -07001118
Al Virof6c2fb52008-05-21 06:32:11 +01001119 if (self->usbdev->descriptor.bcdDevice == cpu_to_le16(fw_version)) {
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001120 /*
1121 * If we're here, we've found a correct patch
1122 * The actual image starts after the "STMP" keyword
1123 * so forward to the firmware header tag
1124 */
1125 for (i = 0; (fw->data[i] != STIR421X_PATCH_END_OF_HDR_TAG)
1126 && (i < fw->size); i++) ;
1127 /* here we check for the out of buffer case */
1128 if ((STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i])
1129 && (i < STIR421X_PATCH_CODE_OFFSET)) {
1130 if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
1131 sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
Samuel Ortiz137dc022006-04-05 22:39:14 -07001132
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001133 /* We can upload the patch to the target */
1134 i += sizeof(STIR421X_PATCH_STMP_TAG);
1135 ret = stir421x_fw_upload(self, &fw->data[i],
1136 fw->size - i);
1137 }
1138 }
1139 }
Samuel Ortiz137dc022006-04-05 22:39:14 -07001140
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001141 release_firmware(fw);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001142
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001143 return ret;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001144}
1145
1146
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147/********************** IRDA DEVICE CALLBACKS **********************/
1148/*
1149 * Main calls from the IrDA/Network subsystem.
1150 * Mostly registering a new irda-usb device and removing it....
1151 * We only deal with the IrDA side of the business, the USB side will
1152 * be dealt with below...
1153 */
1154
1155
1156/*------------------------------------------------------------------*/
1157/*
1158 * Function irda_usb_net_open (dev)
1159 *
1160 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
1161 *
1162 * Note : don't mess with self->netopen - Jean II
1163 */
1164static int irda_usb_net_open(struct net_device *netdev)
1165{
1166 struct irda_usb_cb *self;
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001167 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 char hwname[16];
1169 int i;
1170
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001171 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173 IRDA_ASSERT(netdev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001174 self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 IRDA_ASSERT(self != NULL, return -1;);
1176
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001177 spin_lock_irqsave(&self->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 /* Can only open the device if it's there */
1179 if(!self->present) {
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001180 spin_unlock_irqrestore(&self->lock, flags);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001181 IRDA_WARNING("%s(), device not present!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 return -1;
1183 }
1184
Samuel Ortiz137dc022006-04-05 22:39:14 -07001185 if(self->needspatch) {
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001186 spin_unlock_irqrestore(&self->lock, flags);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001187 IRDA_WARNING("%s(), device needs patch\n", __func__) ;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001188 return -EIO ;
1189 }
1190
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 /* Initialise default speed and xbofs value
1192 * (IrLAP will change that soon) */
1193 self->speed = -1;
1194 self->xbofs = -1;
1195 self->new_speed = -1;
1196 self->new_xbofs = -1;
1197
1198 /* To do *before* submitting Rx urbs and starting net Tx queue
1199 * Jean II */
1200 self->netopen = 1;
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001201 spin_unlock_irqrestore(&self->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202
1203 /*
1204 * Now that everything should be initialized properly,
1205 * Open new IrLAP layer instance to take care of us...
1206 * Note : will send immediately a speed change...
1207 */
1208 sprintf(hwname, "usb#%d", self->usbdev->devnum);
1209 self->irlap = irlap_open(netdev, &self->qos, hwname);
1210 IRDA_ASSERT(self->irlap != NULL, return -1;);
1211
1212 /* Allow IrLAP to send data to us */
1213 netif_start_queue(netdev);
1214
1215 /* We submit all the Rx URB except for one that we keep idle.
1216 * Need to be initialised before submitting other USBs, because
1217 * in some cases as soon as we submit the URBs the USB layer
1218 * will trigger a dummy receive - Jean II */
1219 self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
1220 self->idle_rx_urb->context = NULL;
1221
1222 /* Now that we can pass data to IrLAP, allow the USB layer
1223 * to send us some data... */
1224 for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
1225 struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
1226 if (!skb) {
1227 /* If this ever happen, we are in deep s***.
1228 * Basically, we can't start the Rx path... */
1229 IRDA_WARNING("%s(), Failed to allocate Rx skb\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001230 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 return -1;
1232 }
1233 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
1234 irda_usb_submit(self, skb, self->rx_urb[i]);
1235 }
1236
1237 /* Ready to play !!! */
1238 return 0;
1239}
1240
1241/*------------------------------------------------------------------*/
1242/*
1243 * Function irda_usb_net_close (self)
1244 *
1245 * Network device is taken down. Usually this is done by
1246 * "ifconfig irda0 down"
1247 */
1248static int irda_usb_net_close(struct net_device *netdev)
1249{
1250 struct irda_usb_cb *self;
1251 int i;
1252
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001253 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
1255 IRDA_ASSERT(netdev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001256 self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 IRDA_ASSERT(self != NULL, return -1;);
1258
1259 /* Clear this flag *before* unlinking the urbs and *before*
1260 * stopping the network Tx queue - Jean II */
1261 self->netopen = 0;
1262
1263 /* Stop network Tx queue */
1264 netif_stop_queue(netdev);
1265
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001266 /* Kill defered Rx URB */
1267 del_timer(&self->rx_defer_timer);
1268
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 /* Deallocate all the Rx path buffers (URBs and skb) */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001270 for (i = 0; i < self->max_rx_urb; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 struct urb *urb = self->rx_urb[i];
1272 struct sk_buff *skb = (struct sk_buff *) urb->context;
1273 /* Cancel the receive command */
1274 usb_kill_urb(urb);
1275 /* The skb is ours, free it */
1276 if(skb) {
1277 dev_kfree_skb(skb);
1278 urb->context = NULL;
1279 }
1280 }
1281 /* Cancel Tx and speed URB - need to be synchronous to avoid races */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 usb_kill_urb(self->tx_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 usb_kill_urb(self->speed_urb);
1284
1285 /* Stop and remove instance of IrLAP */
1286 if (self->irlap)
1287 irlap_close(self->irlap);
1288 self->irlap = NULL;
1289
1290 return 0;
1291}
1292
1293/*------------------------------------------------------------------*/
1294/*
1295 * IOCTLs : Extra out-of-band network commands...
1296 */
1297static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1298{
1299 unsigned long flags;
1300 struct if_irda_req *irq = (struct if_irda_req *) rq;
1301 struct irda_usb_cb *self;
1302 int ret = 0;
1303
1304 IRDA_ASSERT(dev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001305 self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 IRDA_ASSERT(self != NULL, return -1;);
1307
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001308 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
1310 switch (cmd) {
1311 case SIOCSBANDWIDTH: /* Set bandwidth */
1312 if (!capable(CAP_NET_ADMIN))
1313 return -EPERM;
1314 /* Protect us from USB callbacks, net watchdog and else. */
1315 spin_lock_irqsave(&self->lock, flags);
1316 /* Check if the device is still there */
1317 if(self->present) {
1318 /* Set the desired speed */
1319 self->new_speed = irq->ifr_baudrate;
1320 irda_usb_change_speed_xbofs(self);
1321 }
1322 spin_unlock_irqrestore(&self->lock, flags);
1323 break;
1324 case SIOCSMEDIABUSY: /* Set media busy */
1325 if (!capable(CAP_NET_ADMIN))
1326 return -EPERM;
1327 /* Check if the IrDA stack is still there */
1328 if(self->netopen)
1329 irda_device_set_media_busy(self->netdev, TRUE);
1330 break;
1331 case SIOCGRECEIVING: /* Check if we are receiving right now */
1332 irq->ifr_receiving = irda_usb_is_receiving(self);
1333 break;
1334 default:
1335 ret = -EOPNOTSUPP;
1336 }
1337
1338 return ret;
1339}
1340
1341/*------------------------------------------------------------------*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342
1343/********************* IRDA CONFIG SUBROUTINES *********************/
1344/*
1345 * Various subroutines dealing with IrDA and network stuff we use to
1346 * configure and initialise each irda-usb instance.
1347 * These functions are used below in the main calls of the driver...
1348 */
1349
1350/*------------------------------------------------------------------*/
1351/*
1352 * Set proper values in the IrDA QOS structure
1353 */
1354static inline void irda_usb_init_qos(struct irda_usb_cb *self)
1355{
1356 struct irda_class_desc *desc;
1357
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001358 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
1360 desc = self->irda_desc;
1361
1362 /* Initialize QoS for this device */
1363 irda_init_max_qos_capabilies(&self->qos);
1364
1365 /* See spec section 7.2 for meaning.
1366 * Values are little endian (as most USB stuff), the IrDA stack
1367 * use it in native order (see parameters.c). - Jean II */
1368 self->qos.baud_rate.bits = le16_to_cpu(desc->wBaudRate);
1369 self->qos.min_turn_time.bits = desc->bmMinTurnaroundTime;
1370 self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
1371 self->qos.window_size.bits = desc->bmWindowSize;
1372 self->qos.data_size.bits = desc->bmDataSize;
1373
1374 IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001375 __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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376
1377 /* Don't always trust what the dongle tell us */
1378 if(self->capability & IUC_SIR_ONLY)
1379 self->qos.baud_rate.bits &= 0x00ff;
1380 if(self->capability & IUC_SMALL_PKT)
1381 self->qos.data_size.bits = 0x07;
1382 if(self->capability & IUC_NO_WINDOW)
1383 self->qos.window_size.bits = 0x01;
1384 if(self->capability & IUC_MAX_WINDOW)
1385 self->qos.window_size.bits = 0x7f;
1386 if(self->capability & IUC_MAX_XBOFS)
1387 self->qos.additional_bofs.bits = 0x01;
1388
1389#if 1
1390 /* Module parameter can override the rx window size */
1391 if (qos_mtt_bits)
1392 self->qos.min_turn_time.bits = qos_mtt_bits;
1393#endif
1394 /*
1395 * Note : most of those values apply only for the receive path,
1396 * the transmit path will be set differently - Jean II
1397 */
1398 irda_qos_bits_to_value(&self->qos);
1399}
1400
1401/*------------------------------------------------------------------*/
Stephen Hemmingerd36733a2009-03-20 19:35:35 +00001402static const struct net_device_ops irda_usb_netdev_ops = {
1403 .ndo_open = irda_usb_net_open,
1404 .ndo_stop = irda_usb_net_close,
1405 .ndo_do_ioctl = irda_usb_net_ioctl,
1406 .ndo_start_xmit = irda_usb_hard_xmit,
1407 .ndo_tx_timeout = irda_usb_net_timeout,
1408};
1409
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410/*
1411 * Initialise the network side of the irda-usb instance
1412 * Called when a new USB instance is registered in irda_usb_probe()
1413 */
1414static inline int irda_usb_open(struct irda_usb_cb *self)
1415{
1416 struct net_device *netdev = self->netdev;
1417
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001418 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419
Stephen Hemmingerd36733a2009-03-20 19:35:35 +00001420 netdev->netdev_ops = &irda_usb_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Stephen Hemmingerd36733a2009-03-20 19:35:35 +00001422 irda_usb_init_qos(self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423
1424 return register_netdev(netdev);
1425}
1426
1427/*------------------------------------------------------------------*/
1428/*
1429 * Cleanup the network side of the irda-usb instance
1430 * Called when a USB instance is removed in irda_usb_disconnect()
1431 */
1432static inline void irda_usb_close(struct irda_usb_cb *self)
1433{
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001434 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
1436 /* Remove netdevice */
1437 unregister_netdev(self->netdev);
1438
1439 /* Remove the speed buffer */
Jesper Juhlb4558ea2005-10-28 16:53:13 -04001440 kfree(self->speed_buff);
1441 self->speed_buff = NULL;
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001442
1443 kfree(self->tx_buff);
1444 self->tx_buff = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445}
1446
1447/********************** USB CONFIG SUBROUTINES **********************/
1448/*
1449 * Various subroutines dealing with USB stuff we use to configure and
1450 * initialise each irda-usb instance.
1451 * These functions are used below in the main calls of the driver...
1452 */
1453
1454/*------------------------------------------------------------------*/
1455/*
1456 * Function irda_usb_parse_endpoints(dev, ifnum)
1457 *
1458 * Parse the various endpoints and find the one we need.
1459 *
1460 * The endpoint are the pipes used to communicate with the USB device.
1461 * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
1462 * These are used to pass frames back and forth with the dongle.
1463 * Most dongle have also an interrupt endpoint, that will be probably
1464 * documented in the next spec...
1465 */
1466static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
1467{
1468 int i; /* Endpoint index in table */
1469
1470 /* Init : no endpoints */
1471 self->bulk_in_ep = 0;
1472 self->bulk_out_ep = 0;
1473 self->bulk_int_ep = 0;
1474
1475 /* Let's look at all those endpoints */
1476 for(i = 0; i < ennum; i++) {
1477 /* All those variables will get optimised by the compiler,
1478 * so let's aim for clarity... - Jean II */
1479 __u8 ep; /* Endpoint address */
1480 __u8 dir; /* Endpoint direction */
1481 __u8 attr; /* Endpoint attribute */
1482 __u16 psize; /* Endpoint max packet size in bytes */
1483
1484 /* Get endpoint address, direction and attribute */
1485 ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1486 dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1487 attr = endpoint[i].desc.bmAttributes;
1488 psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
1489
1490 /* Is it a bulk endpoint ??? */
1491 if(attr == USB_ENDPOINT_XFER_BULK) {
1492 /* We need to find an IN and an OUT */
1493 if(dir == USB_DIR_IN) {
1494 /* This is our Rx endpoint */
1495 self->bulk_in_ep = ep;
1496 } else {
1497 /* This is our Tx endpoint */
1498 self->bulk_out_ep = ep;
1499 self->bulk_out_mtu = psize;
1500 }
1501 } else {
1502 if((attr == USB_ENDPOINT_XFER_INT) &&
1503 (dir == USB_DIR_IN)) {
1504 /* This is our interrupt endpoint */
1505 self->bulk_int_ep = ep;
1506 } else {
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001507 IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __func__, ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 }
1509 }
1510 }
1511
1512 IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001513 __func__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514
1515 return((self->bulk_in_ep != 0) && (self->bulk_out_ep != 0));
1516}
1517
1518#ifdef IU_DUMP_CLASS_DESC
1519/*------------------------------------------------------------------*/
1520/*
1521 * Function usb_irda_dump_class_desc(desc)
1522 *
1523 * Prints out the contents of the IrDA class descriptor
1524 *
1525 */
1526static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
1527{
1528 /* Values are little endian */
1529 printk("bLength=%x\n", desc->bLength);
1530 printk("bDescriptorType=%x\n", desc->bDescriptorType);
1531 printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision));
1532 printk("bmDataSize=%x\n", desc->bmDataSize);
1533 printk("bmWindowSize=%x\n", desc->bmWindowSize);
1534 printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
1535 printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
1536 printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
1537 printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
1538 printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
1539}
1540#endif /* IU_DUMP_CLASS_DESC */
1541
1542/*------------------------------------------------------------------*/
1543/*
1544 * Function irda_usb_find_class_desc(intf)
1545 *
1546 * Returns instance of IrDA class descriptor, or NULL if not found
1547 *
1548 * The class descriptor is some extra info that IrDA USB devices will
1549 * offer to us, describing their IrDA characteristics. We will use that in
1550 * irda_usb_init_qos()
1551 */
1552static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
1553{
1554 struct usb_device *dev = interface_to_usbdev (intf);
1555 struct irda_class_desc *desc;
1556 int ret;
1557
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001558 desc = kzalloc(sizeof(*desc), GFP_KERNEL);
1559 if (!desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561
1562 /* USB-IrDA class spec 1.0:
1563 * 6.1.3: Standard "Get Descriptor" Device Request is not
1564 * appropriate to retrieve class-specific descriptor
1565 * 6.2.5: Class Specific "Get Class Descriptor" Interface Request
1566 * is mandatory and returns the USB-IrDA class descriptor
1567 */
1568
1569 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
1570 IU_REQ_GET_CLASS_DESC,
1571 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1572 0, intf->altsetting->desc.bInterfaceNumber, desc,
1573 sizeof(*desc), 500);
1574
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001575 IRDA_DEBUG(1, "%s(), ret=%d\n", __func__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 if (ret < sizeof(*desc)) {
1577 IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n",
1578 (ret<0) ? "failed" : "too short", ret);
1579 }
1580 else if (desc->bDescriptorType != USB_DT_IRDA) {
1581 IRDA_WARNING("usb-irda: bad class_descriptor type\n");
1582 }
1583 else {
1584#ifdef IU_DUMP_CLASS_DESC
1585 irda_usb_dump_class_desc(desc);
1586#endif /* IU_DUMP_CLASS_DESC */
1587
1588 return desc;
1589 }
1590 kfree(desc);
1591 return NULL;
1592}
1593
1594/*********************** USB DEVICE CALLBACKS ***********************/
1595/*
1596 * Main calls from the USB subsystem.
1597 * Mostly registering a new irda-usb device and removing it....
1598 */
1599
1600/*------------------------------------------------------------------*/
1601/*
1602 * This routine is called by the USB subsystem for each new device
1603 * in the system. We need to check if the device is ours, and in
1604 * this case start handling it.
1605 * The USB layer protect us from reentrancy (via BKL), so we don't need
1606 * to spinlock in there... Jean II
1607 */
1608static int irda_usb_probe(struct usb_interface *intf,
1609 const struct usb_device_id *id)
1610{
1611 struct net_device *net;
1612 struct usb_device *dev = interface_to_usbdev(intf);
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001613 struct irda_usb_cb *self;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 struct usb_host_interface *interface;
1615 struct irda_class_desc *irda_desc;
1616 int ret = -ENOMEM;
1617 int i; /* Driver instance index / Rx URB index */
1618
1619 /* Note : the probe make sure to call us only for devices that
1620 * matches the list of dongle (top of the file). So, we
1621 * don't need to check if the dongle is really ours.
1622 * Jean II */
1623
1624 IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
1625 dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1626 le16_to_cpu(dev->descriptor.idProduct));
1627
1628 net = alloc_irdadev(sizeof(*self));
1629 if (!net)
1630 goto err_out;
1631
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 SET_NETDEV_DEV(net, &intf->dev);
Wang Chen4cf16532008-11-12 23:38:14 -08001633 self = netdev_priv(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 self->netdev = net;
1635 spin_lock_init(&self->lock);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001636 init_timer(&self->rx_defer_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637
Samuel Ortiz137dc022006-04-05 22:39:14 -07001638 self->capability = id->driver_info;
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001639 self->needspatch = ((self->capability & IUC_STIR421X) != 0);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001640
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641 /* Create all of the needed urbs */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001642 if (self->capability & IUC_STIR421X) {
Samuel Ortiz137dc022006-04-05 22:39:14 -07001643 self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001644 self->header_length = USB_IRDA_STIR421X_HEADER;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001645 } else {
1646 self->max_rx_urb = IU_MAX_RX_URBS;
1647 self->header_length = USB_IRDA_HEADER;
1648 }
1649
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001650 self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
Samuel Ortiz137dc022006-04-05 22:39:14 -07001651 GFP_KERNEL);
1652
1653 for (i = 0; i < self->max_rx_urb; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654 self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1655 if (!self->rx_urb[i]) {
1656 goto err_out_1;
1657 }
1658 }
1659 self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1660 if (!self->tx_urb) {
1661 goto err_out_1;
1662 }
1663 self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1664 if (!self->speed_urb) {
1665 goto err_out_2;
1666 }
1667
1668 /* Is this really necessary? (no, except maybe for broken devices) */
1669 if (usb_reset_configuration (dev) < 0) {
1670 err("reset_configuration failed");
1671 ret = -EIO;
1672 goto err_out_3;
1673 }
1674
1675 /* Is this really necessary? */
1676 /* Note : some driver do hardcode the interface number, some others
1677 * specify an alternate, but very few driver do like this.
1678 * Jean II */
1679 ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1680 IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret);
1681 switch (ret) {
1682 case 0:
1683 break;
1684 case -EPIPE: /* -EPIPE = -32 */
1685 /* Martin Diehl says if we get a -EPIPE we should
1686 * be fine and we don't need to do a usb_clear_halt().
1687 * - Jean II */
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001688 IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 break;
1690 default:
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001691 IRDA_DEBUG(0, "%s(), Unknown error %d\n", __func__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 ret = -EIO;
1693 goto err_out_3;
1694 }
1695
1696 /* Find our endpoints */
1697 interface = intf->cur_altsetting;
1698 if(!irda_usb_parse_endpoints(self, interface->endpoint,
1699 interface->desc.bNumEndpoints)) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001700 IRDA_ERROR("%s(), Bogus endpoints...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 ret = -EIO;
1702 goto err_out_3;
1703 }
1704
Samuel Ortiz137dc022006-04-05 22:39:14 -07001705 self->usbdev = dev;
1706
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707 /* Find IrDA class descriptor */
1708 irda_desc = irda_usb_find_class_desc(intf);
1709 ret = -ENODEV;
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001710 if (!irda_desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 goto err_out_3;
1712
Samuel Ortiz137dc022006-04-05 22:39:14 -07001713 if (self->needspatch) {
1714 ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
Randy Dunlap0eb1bd22006-05-06 18:34:10 -07001715 0x02, 0x40, 0, 0, NULL, 0, 500);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001716 if (ret < 0) {
1717 IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
1718 goto err_out_3;
1719 } else {
1720 mdelay(10);
1721 }
1722 }
1723
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724 self->irda_desc = irda_desc;
1725 self->present = 1;
1726 self->netopen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 self->usbintf = intf;
1728
1729 /* Allocate the buffer for speed changes */
1730 /* Don't change this buffer size and allocation without doing
1731 * some heavy and complete testing. Don't ask why :-(
1732 * Jean II */
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001733 self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1734 if (!self->speed_buff)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735 goto err_out_3;
1736
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001737 self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
1738 GFP_KERNEL);
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001739 if (!self->tx_buff)
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001740 goto err_out_4;
1741
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 ret = irda_usb_open(self);
1743 if (ret)
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001744 goto err_out_5;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745
1746 IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
1747 usb_set_intfdata(intf, self);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001748
1749 if (self->needspatch) {
1750 /* Now we fetch and upload the firmware patch */
1751 ret = stir421x_patch_device(self);
1752 self->needspatch = (ret < 0);
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001753 if (self->needspatch) {
1754 IRDA_ERROR("STIR421X: Couldn't upload patch\n");
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001755 goto err_out_6;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001756 }
1757
1758 /* replace IrDA class descriptor with what patched device is now reporting */
1759 irda_desc = irda_usb_find_class_desc (self->usbintf);
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001760 if (!irda_desc) {
Samuel Ortiz137dc022006-04-05 22:39:14 -07001761 ret = -ENODEV;
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001762 goto err_out_6;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001763 }
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001764 kfree(self->irda_desc);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001765 self->irda_desc = irda_desc;
1766 irda_usb_init_qos(self);
1767 }
1768
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 return 0;
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001770err_out_6:
Samuel Ortiz269690a2006-04-14 16:02:07 -07001771 unregister_netdev(self->netdev);
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001772err_out_5:
1773 kfree(self->tx_buff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774err_out_4:
1775 kfree(self->speed_buff);
1776err_out_3:
1777 /* Free all urbs that we may have created */
1778 usb_free_urb(self->speed_urb);
1779err_out_2:
1780 usb_free_urb(self->tx_urb);
1781err_out_1:
Mariusz Kozlowski8fd31e12006-11-08 15:35:38 +01001782 for (i = 0; i < self->max_rx_urb; i++)
1783 usb_free_urb(self->rx_urb[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 free_netdev(net);
1785err_out:
1786 return ret;
1787}
1788
1789/*------------------------------------------------------------------*/
1790/*
1791 * The current irda-usb device is removed, the USB layer tell us
1792 * to shut it down...
1793 * One of the constraints is that when we exit this function,
1794 * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1795 * Most other subsystem allow you to destroy the instance at a time
1796 * when it's convenient to you, to postpone it to a later date, but
1797 * not the USB subsystem.
1798 * So, we must make bloody sure that everything gets deactivated.
1799 * Jean II
1800 */
1801static void irda_usb_disconnect(struct usb_interface *intf)
1802{
1803 unsigned long flags;
1804 struct irda_usb_cb *self = usb_get_intfdata(intf);
1805 int i;
1806
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001807 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
1809 usb_set_intfdata(intf, NULL);
1810 if (!self)
1811 return;
1812
1813 /* Make sure that the Tx path is not executing. - Jean II */
1814 spin_lock_irqsave(&self->lock, flags);
1815
1816 /* Oups ! We are not there any more.
1817 * This will stop/desactivate the Tx path. - Jean II */
1818 self->present = 0;
1819
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001820 /* Kill defered Rx URB */
1821 del_timer(&self->rx_defer_timer);
1822
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823 /* We need to have irq enabled to unlink the URBs. That's OK,
1824 * at this point the Tx path is gone - Jean II */
1825 spin_unlock_irqrestore(&self->lock, flags);
1826
1827 /* Hum... Check if networking is still active (avoid races) */
1828 if((self->netopen) || (self->irlap)) {
1829 /* Accept no more transmissions */
1830 /*netif_device_detach(self->netdev);*/
1831 netif_stop_queue(self->netdev);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001832 /* Stop all the receive URBs. Must be synchronous. */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001833 for (i = 0; i < self->max_rx_urb; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 usb_kill_urb(self->rx_urb[i]);
1835 /* Cancel Tx and speed URB.
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001836 * Make sure it's synchronous to avoid races. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837 usb_kill_urb(self->tx_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838 usb_kill_urb(self->speed_urb);
1839 }
1840
1841 /* Cleanup the device stuff */
1842 irda_usb_close(self);
1843 /* No longer attached to USB bus */
1844 self->usbdev = NULL;
1845 self->usbintf = NULL;
1846
1847 /* Clean up our urbs */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001848 for (i = 0; i < self->max_rx_urb; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 usb_free_urb(self->rx_urb[i]);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001850 kfree(self->rx_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 /* Clean up Tx and speed URB */
1852 usb_free_urb(self->tx_urb);
1853 usb_free_urb(self->speed_urb);
1854
1855 /* Free self and network device */
1856 free_netdev(self->netdev);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001857 IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858}
1859
Tadashi Abee13f9312009-05-25 20:53:27 +00001860#ifdef CONFIG_PM
1861/* USB suspend, so power off the transmitter/receiver */
1862static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
1863{
1864 struct irda_usb_cb *self = usb_get_intfdata(intf);
1865 int i;
1866
1867 netif_device_detach(self->netdev);
1868
1869 if (self->tx_urb != NULL)
1870 usb_kill_urb(self->tx_urb);
1871 if (self->speed_urb != NULL)
1872 usb_kill_urb(self->speed_urb);
1873 for (i = 0; i < self->max_rx_urb; i++) {
1874 if (self->rx_urb[i] != NULL)
1875 usb_kill_urb(self->rx_urb[i]);
1876 }
1877 return 0;
1878}
1879
1880/* Coming out of suspend, so reset hardware */
1881static int irda_usb_resume(struct usb_interface *intf)
1882{
1883 struct irda_usb_cb *self = usb_get_intfdata(intf);
1884 int i;
1885
1886 for (i = 0; i < self->max_rx_urb; i++) {
1887 if (self->rx_urb[i] != NULL)
1888 usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
1889 }
1890
1891 netif_device_attach(self->netdev);
1892 return 0;
1893}
1894#endif
1895
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896/*------------------------------------------------------------------*/
1897/*
1898 * USB device callbacks
1899 */
1900static struct usb_driver irda_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 .name = "irda-usb",
1902 .probe = irda_usb_probe,
1903 .disconnect = irda_usb_disconnect,
1904 .id_table = dongles,
Tadashi Abee13f9312009-05-25 20:53:27 +00001905#ifdef CONFIG_PM
1906 .suspend = irda_usb_suspend,
1907 .resume = irda_usb_resume,
1908#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909};
1910
1911/************************* MODULE CALLBACKS *************************/
1912/*
1913 * Deal with module insertion/removal
1914 * Mostly tell USB about our existence
1915 */
1916
1917/*------------------------------------------------------------------*/
1918/*
1919 * Module insertion
1920 */
1921static int __init usb_irda_init(void)
1922{
1923 int ret;
1924
1925 ret = usb_register(&irda_driver);
1926 if (ret < 0)
1927 return ret;
1928
1929 IRDA_MESSAGE("USB IrDA support registered\n");
1930 return 0;
1931}
1932module_init(usb_irda_init);
1933
1934/*------------------------------------------------------------------*/
1935/*
1936 * Module removal
1937 */
1938static void __exit usb_irda_cleanup(void)
1939{
1940 /* Deregister the driver and remove all pending instances */
1941 usb_deregister(&irda_driver);
1942}
1943module_exit(usb_irda_cleanup);
1944
1945/*------------------------------------------------------------------*/
1946/*
1947 * Module parameters
1948 */
1949module_param(qos_mtt_bits, int, 0);
1950MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
Samuel Ortiz137dc022006-04-05 22:39:14 -07001951MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>");
1952MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953MODULE_LICENSE("GPL");