blob: 215adf6377d09d018063d316c6b60b6e6b7ec498 [file] [log] [blame]
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);
Stephen Hemminger6518bbb2009-08-31 19:50:50 +0000114static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
115 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116static int irda_usb_open(struct irda_usb_cb *self);
117static void irda_usb_close(struct irda_usb_cb *self);
David Howells7d12e782006-10-05 14:55:46 +0100118static void speed_bulk_callback(struct urb *urb);
119static void write_bulk_callback(struct urb *urb);
120static void irda_usb_receive(struct urb *urb);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800121static void irda_usb_rx_defer_expired(unsigned long data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122static int irda_usb_net_open(struct net_device *dev);
123static int irda_usb_net_close(struct net_device *dev);
124static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
125static void irda_usb_net_timeout(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127/************************ TRANSMIT ROUTINES ************************/
128/*
129 * Receive packets from the IrDA stack and send them on the USB pipe.
130 * Handle speed change, timeout and lot's of ugliness...
131 */
132
133/*------------------------------------------------------------------*/
134/*
135 * Function irda_usb_build_header(self, skb, header)
136 *
137 * Builds USB-IrDA outbound header
138 *
139 * When we send an IrDA frame over an USB pipe, we add to it a 1 byte
140 * header. This function create this header with the proper values.
141 *
142 * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2
143 * that the setting of the link speed and xbof number in this outbound header
144 * should be applied *AFTER* the frame has been sent.
145 * Unfortunately, some devices are not compliant with that... It seems that
146 * reading the spec is far too difficult...
147 * Jean II
148 */
149static void irda_usb_build_header(struct irda_usb_cb *self,
150 __u8 *header,
151 int force)
152{
Samuel Ortiz137dc022006-04-05 22:39:14 -0700153 /* Here we check if we have an STIR421x chip,
154 * and if either speed or xbofs (or both) needs
155 * to be changed.
156 */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700157 if (self->capability & IUC_STIR421X &&
Samuel Ortiz137dc022006-04-05 22:39:14 -0700158 ((self->new_speed != -1) || (self->new_xbofs != -1))) {
159
160 /* With STIR421x, speed and xBOFs must be set at the same
161 * time, even if only one of them changes.
162 */
163 if (self->new_speed == -1)
164 self->new_speed = self->speed ;
165
166 if (self->new_xbofs == -1)
167 self->new_xbofs = self->xbofs ;
168 }
169
170 /* Set the link speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 if (self->new_speed != -1) {
172 /* Hum... Ugly hack :-(
173 * Some device are not compliant with the spec and change
174 * parameters *before* sending the frame. - Jean II
175 */
176 if ((self->capability & IUC_SPEED_BUG) &&
177 (!force) && (self->speed != -1)) {
178 /* No speed and xbofs change here
179 * (we'll do it later in the write callback) */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700180 IRDA_DEBUG(2, "%s(), not changing speed yet\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 *header = 0;
182 return;
183 }
184
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700185 IRDA_DEBUG(2, "%s(), changing speed to %d\n", __func__, self->new_speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 self->speed = self->new_speed;
187 /* We will do ` self->new_speed = -1; ' in the completion
188 * handler just in case the current URB fail - Jean II */
189
190 switch (self->speed) {
191 case 2400:
192 *header = SPEED_2400;
193 break;
194 default:
195 case 9600:
196 *header = SPEED_9600;
197 break;
198 case 19200:
199 *header = SPEED_19200;
200 break;
201 case 38400:
202 *header = SPEED_38400;
203 break;
204 case 57600:
205 *header = SPEED_57600;
206 break;
207 case 115200:
208 *header = SPEED_115200;
209 break;
210 case 576000:
211 *header = SPEED_576000;
212 break;
213 case 1152000:
214 *header = SPEED_1152000;
215 break;
216 case 4000000:
217 *header = SPEED_4000000;
218 self->new_xbofs = 0;
219 break;
Samuel Ortiz137dc022006-04-05 22:39:14 -0700220 case 16000000:
221 *header = SPEED_16000000;
222 self->new_xbofs = 0;
223 break;
224 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 } else
226 /* No change */
227 *header = 0;
228
229 /* Set the negotiated additional XBOFS */
230 if (self->new_xbofs != -1) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700231 IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __func__, self->new_xbofs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 self->xbofs = self->new_xbofs;
233 /* We will do ` self->new_xbofs = -1; ' in the completion
234 * handler just in case the current URB fail - Jean II */
235
236 switch (self->xbofs) {
237 case 48:
238 *header |= 0x10;
239 break;
240 case 28:
241 case 24: /* USB spec 1.0 says 24 */
242 *header |= 0x20;
243 break;
244 default:
245 case 12:
246 *header |= 0x30;
247 break;
248 case 5: /* Bug in IrLAP spec? (should be 6) */
249 case 6:
250 *header |= 0x40;
251 break;
252 case 3:
253 *header |= 0x50;
254 break;
255 case 2:
256 *header |= 0x60;
257 break;
258 case 1:
259 *header |= 0x70;
260 break;
261 case 0:
262 *header |= 0x80;
263 break;
264 }
265 }
266}
267
Samuel Ortiz137dc022006-04-05 22:39:14 -0700268/*
269* calculate turnaround time for SigmaTel header
270*/
271static __u8 get_turnaround_time(struct sk_buff *skb)
272{
273 int turnaround_time = irda_get_mtt(skb);
274
275 if ( turnaround_time == 0 )
276 return 0;
277 else if ( turnaround_time <= 10 )
278 return 1;
279 else if ( turnaround_time <= 50 )
280 return 2;
281 else if ( turnaround_time <= 100 )
282 return 3;
283 else if ( turnaround_time <= 500 )
284 return 4;
285 else if ( turnaround_time <= 1000 )
286 return 5;
287 else if ( turnaround_time <= 5000 )
288 return 6;
289 else
290 return 7;
291}
292
293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294/*------------------------------------------------------------------*/
295/*
296 * Send a command to change the speed of the dongle
297 * Need to be called with spinlock on.
298 */
299static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self)
300{
301 __u8 *frame;
302 struct urb *urb;
303 int ret;
304
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700305 IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 self->new_speed, self->new_xbofs);
307
308 /* Grab the speed URB */
309 urb = self->speed_urb;
310 if (urb->status != 0) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700311 IRDA_WARNING("%s(), URB still in use!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 return;
313 }
314
315 /* Allocate the fake frame */
316 frame = self->speed_buff;
317
318 /* Set the new speed and xbofs in this fake frame */
319 irda_usb_build_header(self, frame, 1);
320
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700321 if (self->capability & IUC_STIR421X) {
Samuel Ortiz137dc022006-04-05 22:39:14 -0700322 if (frame[0] == 0) return ; // do nothing if no change
323 frame[1] = 0; // other parameters don't change here
324 frame[2] = 0;
325 }
326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 /* Submit the 0 length IrDA frame to trigger new speed settings */
328 usb_fill_bulk_urb(urb, self->usbdev,
329 usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
330 frame, IRDA_USB_SPEED_MTU,
331 speed_bulk_callback, self);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700332 urb->transfer_buffer_length = self->header_length;
Alan Sternb375a042005-07-29 16:11:07 -0400333 urb->transfer_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335 /* Irq disabled -> GFP_ATOMIC */
336 if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700337 IRDA_WARNING("%s(), failed Speed URB\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 }
339}
340
341/*------------------------------------------------------------------*/
342/*
343 * Speed URB callback
344 * Now, we can only get called for the speed URB.
345 */
David Howells7d12e782006-10-05 14:55:46 +0100346static void speed_bulk_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347{
348 struct irda_usb_cb *self = urb->context;
349
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700350 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352 /* We should always have a context */
353 IRDA_ASSERT(self != NULL, return;);
354 /* We should always be called for the speed URB */
355 IRDA_ASSERT(urb == self->speed_urb, return;);
356
357 /* Check for timeout and other USB nasties */
358 if (urb->status != 0) {
359 /* I get a lot of -ECONNABORTED = -103 here - Jean II */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700360 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 -0700361
362 /* Don't do anything here, that might confuse the USB layer.
363 * Instead, we will wait for irda_usb_net_timeout(), the
364 * network layer watchdog, to fix the situation.
365 * Jean II */
366 /* A reset of the dongle might be welcomed here - Jean II */
367 return;
368 }
369
370 /* urb is now available */
371 //urb->status = 0; -> tested above
372
373 /* New speed and xbof is now commited in hardware */
374 self->new_speed = -1;
375 self->new_xbofs = -1;
376
377 /* Allow the stack to send more packets */
378 netif_wake_queue(self->netdev);
379}
380
381/*------------------------------------------------------------------*/
382/*
383 * Send an IrDA frame to the USB dongle (for transmission)
384 */
Stephen Hemminger6518bbb2009-08-31 19:50:50 +0000385static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb,
386 struct net_device *netdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387{
Wang Chen4cf16532008-11-12 23:38:14 -0800388 struct irda_usb_cb *self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 struct urb *urb = self->tx_urb;
390 unsigned long flags;
391 s32 speed;
392 s16 xbofs;
393 int res, mtt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700395 IRDA_DEBUG(4, "%s() on %s\n", __func__, netdev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 netif_stop_queue(netdev);
398
399 /* Protect us from USB callbacks, net watchdog and else. */
400 spin_lock_irqsave(&self->lock, flags);
401
402 /* Check if the device is still there.
403 * We need to check self->present under the spinlock because
404 * of irda_usb_disconnect() is synchronous - Jean II */
405 if (!self->present) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700406 IRDA_DEBUG(0, "%s(), Device is gone...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 goto drop;
408 }
409
410 /* Check if we need to change the number of xbofs */
411 xbofs = irda_get_next_xbofs(skb);
412 if ((xbofs != self->xbofs) && (xbofs != -1)) {
413 self->new_xbofs = xbofs;
414 }
415
416 /* Check if we need to change the speed */
417 speed = irda_get_next_speed(skb);
418 if ((speed != self->speed) && (speed != -1)) {
419 /* Set the desired speed */
420 self->new_speed = speed;
421
422 /* Check for empty frame */
423 if (!skb->len) {
424 /* IrLAP send us an empty frame to make us change the
425 * speed. Changing speed with the USB adapter is in
426 * fact sending an empty frame to the adapter, so we
427 * could just let the present function do its job.
428 * However, we would wait for min turn time,
429 * do an extra memcpy and increment packet counters...
430 * Jean II */
431 irda_usb_change_speed_xbofs(self);
432 netdev->trans_start = jiffies;
433 /* Will netif_wake_queue() in callback */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 goto drop;
435 }
436 }
437
438 if (urb->status != 0) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700439 IRDA_WARNING("%s(), URB still in use!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 goto drop;
441 }
442
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -0300443 skb_copy_from_linear_data(skb, self->tx_buff + self->header_length, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445 /* Change setting for next frame */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700446 if (self->capability & IUC_STIR421X) {
Samuel Ortiz137dc022006-04-05 22:39:14 -0700447 __u8 turnaround_time;
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800448 __u8* frame = self->tx_buff;
Samuel Ortiz137dc022006-04-05 22:39:14 -0700449 turnaround_time = get_turnaround_time( skb );
Samuel Ortiz137dc022006-04-05 22:39:14 -0700450 irda_usb_build_header(self, frame, 0);
451 frame[2] = turnaround_time;
452 if ((skb->len != 0) &&
453 ((skb->len % 128) == 0) &&
454 ((skb->len % 512) != 0)) {
455 /* add extra byte for special SigmaTel feature */
456 frame[1] = 1;
457 skb_put(skb, 1);
458 } else {
459 frame[1] = 0;
460 }
461 } else {
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800462 irda_usb_build_header(self, self->tx_buff, 0);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700463 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
465 /* FIXME: Make macro out of this one */
466 ((struct irda_skb_cb *)skb->cb)->context = self;
467
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800468 usb_fill_bulk_urb(urb, self->usbdev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 usb_sndbulkpipe(self->usbdev, self->bulk_out_ep),
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800470 self->tx_buff, skb->len + self->header_length,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 write_bulk_callback, skb);
Samuel Ortiz3958fb32007-01-15 19:37:25 -0800472
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 /* This flag (URB_ZERO_PACKET) indicates that what we send is not
474 * a continuous stream of data but separate packets.
475 * In this case, the USB layer will insert an empty USB frame (TD)
476 * after each of our packets that is exact multiple of the frame size.
477 * This is how the dongle will detect the end of packet - Jean II */
Alan Sternb375a042005-07-29 16:11:07 -0400478 urb->transfer_flags = URB_ZERO_PACKET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
480 /* Generate min turn time. FIXME: can we do better than this? */
481 /* Trying to a turnaround time at this level is trying to measure
482 * processor clock cycle with a wrist-watch, approximate at best...
483 *
484 * What we know is the last time we received a frame over USB.
485 * Due to latency over USB that depend on the USB load, we don't
486 * know when this frame was received over IrDA (a few ms before ?)
487 * Then, same story for our outgoing frame...
488 *
489 * In theory, the USB dongle is supposed to handle the turnaround
490 * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's
491 * why this code is enabled only for dongles that doesn't meet
492 * the spec.
493 * Jean II */
494 if (self->capability & IUC_NO_TURN) {
495 mtt = irda_get_mtt(skb);
496 if (mtt) {
497 int diff;
498 do_gettimeofday(&self->now);
499 diff = self->now.tv_usec - self->stamp.tv_usec;
500#ifdef IU_USB_MIN_RTT
501 /* Factor in USB delays -> Get rid of udelay() that
502 * would be lost in the noise - Jean II */
503 diff += IU_USB_MIN_RTT;
504#endif /* IU_USB_MIN_RTT */
505 /* If the usec counter did wraparound, the diff will
506 * go negative (tv_usec is a long), so we need to
507 * correct it by one second. Jean II */
508 if (diff < 0)
509 diff += 1000000;
510
511 /* Check if the mtt is larger than the time we have
512 * already used by all the protocol processing
513 */
514 if (mtt > diff) {
515 mtt -= diff;
516 if (mtt > 1000)
517 mdelay(mtt/1000);
518 else
519 udelay(mtt);
520 }
521 }
522 }
523
524 /* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */
525 if ((res = usb_submit_urb(urb, GFP_ATOMIC))) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700526 IRDA_WARNING("%s(), failed Tx URB\n", __func__);
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800527 netdev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 /* Let USB recover : We will catch that in the watchdog */
529 /*netif_start_queue(netdev);*/
530 } else {
531 /* Increment packet stats */
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800532 netdev->stats.tx_packets++;
533 netdev->stats.tx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535 netdev->trans_start = jiffies;
536 }
537 spin_unlock_irqrestore(&self->lock, flags);
538
Patrick McHardy6ed10652009-06-23 06:03:08 +0000539 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541drop:
542 /* Drop silently the skb and exit */
543 dev_kfree_skb(skb);
544 spin_unlock_irqrestore(&self->lock, flags);
Patrick McHardy4bd73ae2009-06-12 03:17:19 +0000545 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546}
547
548/*------------------------------------------------------------------*/
549/*
550 * Note : this function will be called only for tx_urb...
551 */
David Howells7d12e782006-10-05 14:55:46 +0100552static void write_bulk_callback(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553{
554 unsigned long flags;
555 struct sk_buff *skb = urb->context;
556 struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context;
557
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700558 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560 /* We should always have a context */
561 IRDA_ASSERT(self != NULL, return;);
562 /* We should always be called for the speed URB */
563 IRDA_ASSERT(urb == self->tx_urb, return;);
564
565 /* Free up the skb */
566 dev_kfree_skb_any(skb);
567 urb->context = NULL;
568
569 /* Check for timeout and other USB nasties */
570 if (urb->status != 0) {
571 /* I get a lot of -ECONNABORTED = -103 here - Jean II */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700572 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 -0700573
574 /* Don't do anything here, that might confuse the USB layer,
575 * and we could go in recursion and blow the kernel stack...
576 * Instead, we will wait for irda_usb_net_timeout(), the
577 * network layer watchdog, to fix the situation.
578 * Jean II */
579 /* A reset of the dongle might be welcomed here - Jean II */
580 return;
581 }
582
583 /* urb is now available */
584 //urb->status = 0; -> tested above
585
586 /* Make sure we read self->present properly */
587 spin_lock_irqsave(&self->lock, flags);
588
589 /* If the network is closed, stop everything */
590 if ((!self->netopen) || (!self->present)) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700591 IRDA_DEBUG(0, "%s(), Network is gone...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 spin_unlock_irqrestore(&self->lock, flags);
593 return;
594 }
595
596 /* If changes to speed or xbofs is pending... */
597 if ((self->new_speed != -1) || (self->new_xbofs != -1)) {
598 if ((self->new_speed != self->speed) ||
599 (self->new_xbofs != self->xbofs)) {
600 /* We haven't changed speed yet (because of
601 * IUC_SPEED_BUG), so do it now - Jean II */
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700602 IRDA_DEBUG(1, "%s(), Changing speed now...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 irda_usb_change_speed_xbofs(self);
604 } else {
605 /* New speed and xbof is now commited in hardware */
606 self->new_speed = -1;
607 self->new_xbofs = -1;
608 /* Done, waiting for next packet */
609 netif_wake_queue(self->netdev);
610 }
611 } else {
612 /* Otherwise, allow the stack to send more packets */
613 netif_wake_queue(self->netdev);
614 }
615 spin_unlock_irqrestore(&self->lock, flags);
616}
617
618/*------------------------------------------------------------------*/
619/*
620 * Watchdog timer from the network layer.
621 * After a predetermined timeout, if we don't give confirmation that
622 * the packet has been sent (i.e. no call to netif_wake_queue()),
623 * the network layer will call this function.
624 * Note that URB that we submit have also a timeout. When the URB timeout
625 * expire, the normal URB callback is called (write_bulk_callback()).
626 */
627static void irda_usb_net_timeout(struct net_device *netdev)
628{
629 unsigned long flags;
Wang Chen4cf16532008-11-12 23:38:14 -0800630 struct irda_usb_cb *self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 struct urb *urb;
632 int done = 0; /* If we have made any progress */
633
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700634 IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 IRDA_ASSERT(self != NULL, return;);
636
637 /* Protect us from USB callbacks, net Tx and else. */
638 spin_lock_irqsave(&self->lock, flags);
639
640 /* self->present *MUST* be read under spinlock */
641 if (!self->present) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700642 IRDA_WARNING("%s(), device not present!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 netif_stop_queue(netdev);
644 spin_unlock_irqrestore(&self->lock, flags);
645 return;
646 }
647
648 /* Check speed URB */
649 urb = self->speed_urb;
650 if (urb->status != 0) {
651 IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
652
653 switch (urb->status) {
654 case -EINPROGRESS:
655 usb_unlink_urb(urb);
656 /* Note : above will *NOT* call netif_wake_queue()
657 * in completion handler, we will come back here.
658 * Jean II */
659 done = 1;
660 break;
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700661 case -ECONNRESET:
662 case -ENOENT: /* urb unlinked by us */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 default: /* ??? - Play safe */
664 urb->status = 0;
665 netif_wake_queue(self->netdev);
666 done = 1;
667 break;
668 }
669 }
670
671 /* Check Tx URB */
672 urb = self->tx_urb;
673 if (urb->status != 0) {
674 struct sk_buff *skb = urb->context;
675
676 IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags);
677
678 /* Increase error count */
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800679 netdev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
681#ifdef IU_BUG_KICK_TIMEOUT
682 /* Can't be a bad idea to reset the speed ;-) - Jean II */
683 if(self->new_speed == -1)
684 self->new_speed = self->speed;
685 if(self->new_xbofs == -1)
686 self->new_xbofs = self->xbofs;
687 irda_usb_change_speed_xbofs(self);
688#endif /* IU_BUG_KICK_TIMEOUT */
689
690 switch (urb->status) {
691 case -EINPROGRESS:
692 usb_unlink_urb(urb);
693 /* Note : above will *NOT* call netif_wake_queue()
694 * in completion handler, because urb->status will
695 * be -ENOENT. We will fix that at the next watchdog,
696 * leaving more time to USB to recover...
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 * Jean II */
698 done = 1;
699 break;
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700700 case -ECONNRESET:
701 case -ENOENT: /* urb unlinked by us */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 default: /* ??? - Play safe */
703 if(skb != NULL) {
704 dev_kfree_skb_any(skb);
705 urb->context = NULL;
706 }
707 urb->status = 0;
708 netif_wake_queue(self->netdev);
709 done = 1;
710 break;
711 }
712 }
713 spin_unlock_irqrestore(&self->lock, flags);
714
715 /* Maybe we need a reset */
716 /* Note : Some drivers seem to use a usb_set_interface() when they
717 * need to reset the hardware. Hum...
718 */
719
720 /* if(done == 0) */
721}
722
723/************************* RECEIVE ROUTINES *************************/
724/*
725 * Receive packets from the USB layer stack and pass them to the IrDA stack.
726 * Try to work around USB failures...
727 */
728
729/*
730 * Note :
731 * Some of you may have noticed that most dongle have an interrupt in pipe
732 * that we don't use. Here is the little secret...
733 * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic
734 * in every USB frame. This is unnecessary overhead.
735 * The interrupt in pipe will generate an event every time a packet is
736 * received. Reading an interrupt pipe adds minimal overhead, but has some
737 * latency (~1ms).
738 * If we are connected (speed != 9600), we want to minimise latency, so
739 * we just always hang the Rx URB and ignore the interrupt.
740 * If we are not connected (speed == 9600), there is usually no Rx traffic,
741 * and we want to minimise the USB overhead. In this case we should wait
742 * on the interrupt pipe and hang the Rx URB only when an interrupt is
743 * received.
744 * Jean II
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800745 *
746 * Note : don't read the above as what we are currently doing, but as
747 * something we could do with KC dongle. Also don't forget that the
748 * interrupt pipe is not part of the original standard, so this would
749 * need to be optional...
750 * Jean II
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 */
752
753/*------------------------------------------------------------------*/
754/*
755 * Submit a Rx URB to the USB layer to handle reception of a frame
756 * Mostly called by the completion callback of the previous URB.
757 *
758 * Jean II
759 */
760static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb)
761{
762 struct irda_skb_cb *cb;
763 int ret;
764
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700765 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
767 /* This should never happen */
768 IRDA_ASSERT(skb != NULL, return;);
769 IRDA_ASSERT(urb != NULL, return;);
770
771 /* Save ourselves in the skb */
772 cb = (struct irda_skb_cb *) skb->cb;
773 cb->context = self;
774
775 /* Reinitialize URB */
776 usb_fill_bulk_urb(urb, self->usbdev,
777 usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep),
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800778 skb->data, IRDA_SKB_MAX_MTU,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 irda_usb_receive, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 urb->status = 0;
781
782 /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */
783 ret = usb_submit_urb(urb, GFP_ATOMIC);
784 if (ret) {
785 /* If this ever happen, we are in deep s***.
786 * Basically, the Rx path will stop... */
787 IRDA_WARNING("%s(), Failed to submit Rx URB %d\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700788 __func__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 }
790}
791
792/*------------------------------------------------------------------*/
793/*
794 * Function irda_usb_receive(urb)
795 *
796 * Called by the USB subsystem when a frame has been received
797 *
798 */
David Howells7d12e782006-10-05 14:55:46 +0100799static void irda_usb_receive(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800{
801 struct sk_buff *skb = (struct sk_buff *) urb->context;
802 struct irda_usb_cb *self;
803 struct irda_skb_cb *cb;
804 struct sk_buff *newskb;
805 struct sk_buff *dataskb;
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800806 struct urb *next_urb;
Eugene Teoda818172006-03-15 14:57:19 -0800807 unsigned int len, docopy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700809 IRDA_DEBUG(2, "%s(), len=%d\n", __func__, urb->actual_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
811 /* Find ourselves */
812 cb = (struct irda_skb_cb *) skb->cb;
813 IRDA_ASSERT(cb != NULL, return;);
814 self = (struct irda_usb_cb *) cb->context;
815 IRDA_ASSERT(self != NULL, return;);
816
817 /* If the network is closed or the device gone, stop everything */
818 if ((!self->netopen) || (!self->present)) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700819 IRDA_DEBUG(0, "%s(), Network is gone!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 /* Don't re-submit the URB : will stall the Rx path */
821 return;
822 }
823
824 /* Check the status */
825 if (urb->status != 0) {
826 switch (urb->status) {
827 case -EILSEQ:
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800828 self->netdev->stats.rx_crc_errors++;
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800829 /* Also precursor to a hot-unplug on UHCI. */
830 /* Fallthrough... */
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700831 case -ECONNRESET:
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800832 /* Random error, if I remember correctly */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 /* uhci_cleanup_unlink() is going to kill the Rx
834 * URB just after we return. No problem, at this
835 * point the URB will be idle ;-) - Jean II */
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700836 case -ESHUTDOWN:
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800837 /* That's usually a hot-unplug. Submit will fail... */
Pete Zaitcev38e2bfc2006-09-18 22:49:02 -0700838 case -ETIME:
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800839 /* Usually precursor to a hot-unplug on OHCI. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 default:
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800841 self->netdev->stats.rx_errors++;
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700842 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 -0700843 break;
844 }
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800845 /* If we received an error, we don't want to resubmit the
846 * Rx URB straight away but to give the USB layer a little
847 * bit of breathing room.
848 * We are in the USB thread context, therefore there is a
849 * danger of recursion (new URB we submit fails, we come
850 * back here).
851 * With recent USB stack (2.6.15+), I'm seeing that on
852 * hot unplug of the dongle...
853 * Lowest effective timer is 10ms...
854 * Jean II */
855 self->rx_defer_timer.function = &irda_usb_rx_defer_expired;
856 self->rx_defer_timer.data = (unsigned long) urb;
857 mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000));
858 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 }
860
861 /* Check for empty frames */
Samuel Ortiz137dc022006-04-05 22:39:14 -0700862 if (urb->actual_length <= self->header_length) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700863 IRDA_WARNING("%s(), empty frame!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 goto done;
865 }
866
867 /*
868 * Remember the time we received this frame, so we can
869 * reduce the min turn time a bit since we will know
870 * how much time we have used for protocol processing
871 */
872 do_gettimeofday(&self->stamp);
873
874 /* Check if we need to copy the data to a new skb or not.
875 * For most frames, we use ZeroCopy and pass the already
876 * allocated skb up the stack.
877 * If the frame is small, it is more efficient to copy it
878 * to save memory (copy will be fast anyway - that's
879 * called Rx-copy-break). Jean II */
880 docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD);
881
882 /* Allocate a new skb */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700883 if (self->capability & IUC_STIR421X)
884 newskb = dev_alloc_skb(docopy ? urb->actual_length :
885 IRDA_SKB_MAX_MTU +
886 USB_IRDA_STIR421X_HEADER);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700887 else
Nick Fedchik8ef80ae2006-06-11 20:56:02 -0700888 newskb = dev_alloc_skb(docopy ? urb->actual_length :
889 IRDA_SKB_MAX_MTU);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700890
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 if (!newskb) {
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800892 self->netdev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 /* We could deliver the current skb, but this would stall
894 * the Rx path. Better drop the packet... Jean II */
895 goto done;
896 }
897
898 /* Make sure IP header get aligned (IrDA header is 5 bytes) */
899 /* But IrDA-USB header is 1 byte. Jean II */
900 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
901
902 if(docopy) {
903 /* Copy packet, so we can recycle the original */
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -0300904 skb_copy_from_linear_data(skb, newskb->data, urb->actual_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 /* Deliver this new skb */
906 dataskb = newskb;
907 /* And hook the old skb to the URB
908 * Note : we don't need to "clean up" the old skb,
909 * as we never touched it. Jean II */
910 } else {
911 /* We are using ZeroCopy. Deliver old skb */
912 dataskb = skb;
913 /* And hook the new skb to the URB */
914 skb = newskb;
915 }
916
917 /* Set proper length on skb & remove USB-IrDA header */
918 skb_put(dataskb, urb->actual_length);
Samuel Ortiz137dc022006-04-05 22:39:14 -0700919 skb_pull(dataskb, self->header_length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
921 /* Ask the networking layer to queue the packet for the IrDA stack */
922 dataskb->dev = self->netdev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -0700923 skb_reset_mac_header(dataskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 dataskb->protocol = htons(ETH_P_IRDA);
Eugene Teoda818172006-03-15 14:57:19 -0800925 len = dataskb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 netif_rx(dataskb);
927
928 /* Keep stats up to date */
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800929 self->netdev->stats.rx_bytes += len;
930 self->netdev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
932done:
933 /* Note : at this point, the URB we've just received (urb)
934 * is still referenced by the USB layer. For example, if we
935 * have received a -ECONNRESET, uhci_cleanup_unlink() will
936 * continue to process it (in fact, cleaning it up).
937 * If we were to submit this URB, disaster would ensue.
938 * Therefore, we submit our idle URB, and put this URB in our
939 * idle slot....
940 * Jean II */
941 /* Note : with this scheme, we could submit the idle URB before
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800942 * processing the Rx URB. I don't think it would buy us anything as
943 * we are running in the USB thread context. Jean II */
944 next_urb = self->idle_rx_urb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 /* Recycle Rx URB : Now, the idle URB is the present one */
947 urb->context = NULL;
948 self->idle_rx_urb = urb;
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800949
950 /* Submit the idle URB to replace the URB we've just received.
951 * Do it last to avoid race conditions... Jean II */
952 irda_usb_submit(self, skb, next_urb);
953}
954
955/*------------------------------------------------------------------*/
956/*
957 * In case of errors, we want the USB layer to have time to recover.
958 * Now, it is time to resubmit ouur Rx URB...
959 */
960static void irda_usb_rx_defer_expired(unsigned long data)
961{
962 struct urb *urb = (struct urb *) data;
963 struct sk_buff *skb = (struct sk_buff *) urb->context;
964 struct irda_usb_cb *self;
965 struct irda_skb_cb *cb;
966 struct urb *next_urb;
967
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700968 IRDA_DEBUG(2, "%s()\n", __func__);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -0800969
970 /* Find ourselves */
971 cb = (struct irda_skb_cb *) skb->cb;
972 IRDA_ASSERT(cb != NULL, return;);
973 self = (struct irda_usb_cb *) cb->context;
974 IRDA_ASSERT(self != NULL, return;);
975
976 /* Same stuff as when Rx is done, see above... */
977 next_urb = self->idle_rx_urb;
978 urb->context = NULL;
979 self->idle_rx_urb = urb;
980 irda_usb_submit(self, skb, next_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981}
982
983/*------------------------------------------------------------------*/
984/*
985 * Callbak from IrDA layer. IrDA wants to know if we have
986 * started receiving anything.
987 */
988static int irda_usb_is_receiving(struct irda_usb_cb *self)
989{
990 /* Note : because of the way UHCI works, it's almost impossible
991 * to get this info. The Controller DMA directly to memory and
992 * signal only when the whole frame is finished. To know if the
993 * first TD of the URB has been filled or not seems hard work...
994 *
995 * The other solution would be to use the "receiving" command
996 * on the default decriptor with a usb_control_msg(), but that
997 * would add USB traffic and would return result only in the
998 * next USB frame (~1ms).
999 *
1000 * I've been told that current dongles send status info on their
1001 * interrupt endpoint, and that's what the Windows driver uses
1002 * to know this info. Unfortunately, this is not yet in the spec...
1003 *
1004 * Jean II
1005 */
1006
1007 return 0; /* For now */
1008}
1009
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001010#define STIR421X_PATCH_PRODUCT_VER "Product Version: "
1011#define STIR421X_PATCH_STMP_TAG "STMP"
1012#define STIR421X_PATCH_CODE_OFFSET 512 /* patch image starts before here */
1013/* marks end of patch file header (PC DOS text file EOF character) */
1014#define STIR421X_PATCH_END_OF_HDR_TAG 0x1A
1015#define STIR421X_PATCH_BLOCK_SIZE 1023
Samuel Ortiz137dc022006-04-05 22:39:14 -07001016
1017/*
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001018 * Function stir421x_fwupload (struct irda_usb_cb *self,
1019 * unsigned char *patch,
1020 * const unsigned int patch_len)
1021 *
1022 * Upload firmware code to SigmaTel 421X IRDA-USB dongle
Samuel Ortiz137dc022006-04-05 22:39:14 -07001023 */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001024static int stir421x_fw_upload(struct irda_usb_cb *self,
David Woodhouseafd636e2008-05-24 00:10:26 +01001025 const unsigned char *patch,
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001026 const unsigned int patch_len)
Samuel Ortiz137dc022006-04-05 22:39:14 -07001027{
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001028 int ret = -ENOMEM;
1029 int actual_len = 0;
1030 unsigned int i;
1031 unsigned int block_size = 0;
1032 unsigned char *patch_block;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001033
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001034 patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL);
1035 if (patch_block == NULL)
1036 return -ENOMEM;
1037
1038 /* break up patch into 1023-byte sections */
1039 for (i = 0; i < patch_len; i += block_size) {
1040 block_size = patch_len - i;
1041
1042 if (block_size > STIR421X_PATCH_BLOCK_SIZE)
1043 block_size = STIR421X_PATCH_BLOCK_SIZE;
1044
1045 /* upload the patch section */
1046 memcpy(patch_block, patch + i, block_size);
1047
1048 ret = usb_bulk_msg(self->usbdev,
1049 usb_sndbulkpipe(self->usbdev,
1050 self->bulk_out_ep),
1051 patch_block, block_size,
1052 &actual_len, msecs_to_jiffies(500));
1053 IRDA_DEBUG(3,"%s(): Bulk send %u bytes, ret=%d\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001054 __func__, actual_len, ret);
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001055
1056 if (ret < 0)
1057 break;
Nigel Williams2e360d812007-03-16 20:28:36 -07001058
1059 mdelay(10);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001060 }
1061
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001062 kfree(patch_block);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001063
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001064 return ret;
1065 }
Samuel Ortiz137dc022006-04-05 22:39:14 -07001066
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001067/*
1068 * Function stir421x_patch_device(struct irda_usb_cb *self)
1069 *
1070 * Get a firmware code from userspase using hotplug request_firmware() call
1071 */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001072static int stir421x_patch_device(struct irda_usb_cb *self)
1073{
David Woodhouseafd636e2008-05-24 00:10:26 +01001074 unsigned int i;
1075 int ret;
Jos-Vicente Gilabert2950e952009-01-14 20:55:00 -08001076 char stir421x_fw_name[12];
David Woodhouseafd636e2008-05-24 00:10:26 +01001077 const struct firmware *fw;
1078 const unsigned char *fw_version_ptr; /* pointer to version string */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001079 unsigned long fw_version = 0;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001080
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001081 /*
1082 * Known firmware patch file names for STIR421x dongles
1083 * are "42101001.sb" or "42101002.sb"
1084 */
1085 sprintf(stir421x_fw_name, "4210%4X.sb",
1086 self->usbdev->descriptor.bcdDevice);
1087 ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
1088 if (ret < 0)
1089 return ret;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001090
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001091 /* We get a patch from userspace */
Andrew Mortoned6a2092006-06-25 05:49:19 -07001092 IRDA_MESSAGE("%s(): Received firmware %s (%zu bytes)\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001093 __func__, stir421x_fw_name, fw->size);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001094
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001095 ret = -EINVAL;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001096
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001097 /* Get the bcd product version */
1098 if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
1099 sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
1100 fw_version_ptr = fw->data +
1101 sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001102
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001103 /* Let's check if the product version is dotted */
1104 if (fw_version_ptr[3] == '.' &&
1105 fw_version_ptr[7] == '.') {
1106 unsigned long major, minor, build;
1107 major = simple_strtoul(fw_version_ptr, NULL, 10);
1108 minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
1109 build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001110
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001111 fw_version = (major << 12)
1112 + (minor << 8)
1113 + ((build / 10) << 4)
1114 + (build % 10);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001115
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001116 IRDA_DEBUG(3, "%s(): Firmware Product version %ld\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001117 __func__, fw_version);
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001118 }
1119 }
Samuel Ortiz137dc022006-04-05 22:39:14 -07001120
Al Virof6c2fb52008-05-21 06:32:11 +01001121 if (self->usbdev->descriptor.bcdDevice == cpu_to_le16(fw_version)) {
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001122 /*
1123 * If we're here, we've found a correct patch
1124 * The actual image starts after the "STMP" keyword
1125 * so forward to the firmware header tag
1126 */
1127 for (i = 0; (fw->data[i] != STIR421X_PATCH_END_OF_HDR_TAG)
1128 && (i < fw->size); i++) ;
1129 /* here we check for the out of buffer case */
1130 if ((STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i])
1131 && (i < STIR421X_PATCH_CODE_OFFSET)) {
1132 if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
1133 sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
Samuel Ortiz137dc022006-04-05 22:39:14 -07001134
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001135 /* We can upload the patch to the target */
1136 i += sizeof(STIR421X_PATCH_STMP_TAG);
1137 ret = stir421x_fw_upload(self, &fw->data[i],
1138 fw->size - i);
1139 }
1140 }
1141 }
Samuel Ortiz137dc022006-04-05 22:39:14 -07001142
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001143 release_firmware(fw);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001144
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001145 return ret;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001146}
1147
1148
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149/********************** IRDA DEVICE CALLBACKS **********************/
1150/*
1151 * Main calls from the IrDA/Network subsystem.
1152 * Mostly registering a new irda-usb device and removing it....
1153 * We only deal with the IrDA side of the business, the USB side will
1154 * be dealt with below...
1155 */
1156
1157
1158/*------------------------------------------------------------------*/
1159/*
1160 * Function irda_usb_net_open (dev)
1161 *
1162 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
1163 *
1164 * Note : don't mess with self->netopen - Jean II
1165 */
1166static int irda_usb_net_open(struct net_device *netdev)
1167{
1168 struct irda_usb_cb *self;
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001169 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 char hwname[16];
1171 int i;
1172
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001173 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
1175 IRDA_ASSERT(netdev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001176 self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 IRDA_ASSERT(self != NULL, return -1;);
1178
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001179 spin_lock_irqsave(&self->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 /* Can only open the device if it's there */
1181 if(!self->present) {
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001182 spin_unlock_irqrestore(&self->lock, flags);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001183 IRDA_WARNING("%s(), device not present!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 return -1;
1185 }
1186
Samuel Ortiz137dc022006-04-05 22:39:14 -07001187 if(self->needspatch) {
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001188 spin_unlock_irqrestore(&self->lock, flags);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001189 IRDA_WARNING("%s(), device needs patch\n", __func__) ;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001190 return -EIO ;
1191 }
1192
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 /* Initialise default speed and xbofs value
1194 * (IrLAP will change that soon) */
1195 self->speed = -1;
1196 self->xbofs = -1;
1197 self->new_speed = -1;
1198 self->new_xbofs = -1;
1199
1200 /* To do *before* submitting Rx urbs and starting net Tx queue
1201 * Jean II */
1202 self->netopen = 1;
Oliver Neukum497ba7f2007-12-16 14:07:36 -08001203 spin_unlock_irqrestore(&self->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
1205 /*
1206 * Now that everything should be initialized properly,
1207 * Open new IrLAP layer instance to take care of us...
1208 * Note : will send immediately a speed change...
1209 */
1210 sprintf(hwname, "usb#%d", self->usbdev->devnum);
1211 self->irlap = irlap_open(netdev, &self->qos, hwname);
1212 IRDA_ASSERT(self->irlap != NULL, return -1;);
1213
1214 /* Allow IrLAP to send data to us */
1215 netif_start_queue(netdev);
1216
1217 /* We submit all the Rx URB except for one that we keep idle.
1218 * Need to be initialised before submitting other USBs, because
1219 * in some cases as soon as we submit the URBs the USB layer
1220 * will trigger a dummy receive - Jean II */
1221 self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS];
1222 self->idle_rx_urb->context = NULL;
1223
1224 /* Now that we can pass data to IrLAP, allow the USB layer
1225 * to send us some data... */
1226 for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) {
1227 struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
1228 if (!skb) {
1229 /* If this ever happen, we are in deep s***.
1230 * Basically, we can't start the Rx path... */
1231 IRDA_WARNING("%s(), Failed to allocate Rx skb\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001232 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 return -1;
1234 }
1235 //skb_reserve(newskb, USB_IRDA_HEADER - 1);
1236 irda_usb_submit(self, skb, self->rx_urb[i]);
1237 }
1238
1239 /* Ready to play !!! */
1240 return 0;
1241}
1242
1243/*------------------------------------------------------------------*/
1244/*
1245 * Function irda_usb_net_close (self)
1246 *
1247 * Network device is taken down. Usually this is done by
1248 * "ifconfig irda0 down"
1249 */
1250static int irda_usb_net_close(struct net_device *netdev)
1251{
1252 struct irda_usb_cb *self;
1253 int i;
1254
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001255 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
1257 IRDA_ASSERT(netdev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001258 self = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 IRDA_ASSERT(self != NULL, return -1;);
1260
1261 /* Clear this flag *before* unlinking the urbs and *before*
1262 * stopping the network Tx queue - Jean II */
1263 self->netopen = 0;
1264
1265 /* Stop network Tx queue */
1266 netif_stop_queue(netdev);
1267
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001268 /* Kill defered Rx URB */
1269 del_timer(&self->rx_defer_timer);
1270
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 /* Deallocate all the Rx path buffers (URBs and skb) */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001272 for (i = 0; i < self->max_rx_urb; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 struct urb *urb = self->rx_urb[i];
1274 struct sk_buff *skb = (struct sk_buff *) urb->context;
1275 /* Cancel the receive command */
1276 usb_kill_urb(urb);
1277 /* The skb is ours, free it */
1278 if(skb) {
1279 dev_kfree_skb(skb);
1280 urb->context = NULL;
1281 }
1282 }
1283 /* Cancel Tx and speed URB - need to be synchronous to avoid races */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 usb_kill_urb(self->tx_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 usb_kill_urb(self->speed_urb);
1286
1287 /* Stop and remove instance of IrLAP */
1288 if (self->irlap)
1289 irlap_close(self->irlap);
1290 self->irlap = NULL;
1291
1292 return 0;
1293}
1294
1295/*------------------------------------------------------------------*/
1296/*
1297 * IOCTLs : Extra out-of-band network commands...
1298 */
1299static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1300{
1301 unsigned long flags;
1302 struct if_irda_req *irq = (struct if_irda_req *) rq;
1303 struct irda_usb_cb *self;
1304 int ret = 0;
1305
1306 IRDA_ASSERT(dev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001307 self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 IRDA_ASSERT(self != NULL, return -1;);
1309
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001310 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
1312 switch (cmd) {
1313 case SIOCSBANDWIDTH: /* Set bandwidth */
1314 if (!capable(CAP_NET_ADMIN))
1315 return -EPERM;
1316 /* Protect us from USB callbacks, net watchdog and else. */
1317 spin_lock_irqsave(&self->lock, flags);
1318 /* Check if the device is still there */
1319 if(self->present) {
1320 /* Set the desired speed */
1321 self->new_speed = irq->ifr_baudrate;
1322 irda_usb_change_speed_xbofs(self);
1323 }
1324 spin_unlock_irqrestore(&self->lock, flags);
1325 break;
1326 case SIOCSMEDIABUSY: /* Set media busy */
1327 if (!capable(CAP_NET_ADMIN))
1328 return -EPERM;
1329 /* Check if the IrDA stack is still there */
1330 if(self->netopen)
1331 irda_device_set_media_busy(self->netdev, TRUE);
1332 break;
1333 case SIOCGRECEIVING: /* Check if we are receiving right now */
1334 irq->ifr_receiving = irda_usb_is_receiving(self);
1335 break;
1336 default:
1337 ret = -EOPNOTSUPP;
1338 }
1339
1340 return ret;
1341}
1342
1343/*------------------------------------------------------------------*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344
1345/********************* IRDA CONFIG SUBROUTINES *********************/
1346/*
1347 * Various subroutines dealing with IrDA and network stuff we use to
1348 * configure and initialise each irda-usb instance.
1349 * These functions are used below in the main calls of the driver...
1350 */
1351
1352/*------------------------------------------------------------------*/
1353/*
1354 * Set proper values in the IrDA QOS structure
1355 */
1356static inline void irda_usb_init_qos(struct irda_usb_cb *self)
1357{
1358 struct irda_class_desc *desc;
1359
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001360 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
1362 desc = self->irda_desc;
1363
1364 /* Initialize QoS for this device */
1365 irda_init_max_qos_capabilies(&self->qos);
1366
1367 /* See spec section 7.2 for meaning.
1368 * Values are little endian (as most USB stuff), the IrDA stack
1369 * use it in native order (see parameters.c). - Jean II */
1370 self->qos.baud_rate.bits = le16_to_cpu(desc->wBaudRate);
1371 self->qos.min_turn_time.bits = desc->bmMinTurnaroundTime;
1372 self->qos.additional_bofs.bits = desc->bmAdditionalBOFs;
1373 self->qos.window_size.bits = desc->bmWindowSize;
1374 self->qos.data_size.bits = desc->bmDataSize;
1375
1376 IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001377 __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 -07001378
1379 /* Don't always trust what the dongle tell us */
1380 if(self->capability & IUC_SIR_ONLY)
1381 self->qos.baud_rate.bits &= 0x00ff;
1382 if(self->capability & IUC_SMALL_PKT)
1383 self->qos.data_size.bits = 0x07;
1384 if(self->capability & IUC_NO_WINDOW)
1385 self->qos.window_size.bits = 0x01;
1386 if(self->capability & IUC_MAX_WINDOW)
1387 self->qos.window_size.bits = 0x7f;
1388 if(self->capability & IUC_MAX_XBOFS)
1389 self->qos.additional_bofs.bits = 0x01;
1390
1391#if 1
1392 /* Module parameter can override the rx window size */
1393 if (qos_mtt_bits)
1394 self->qos.min_turn_time.bits = qos_mtt_bits;
1395#endif
1396 /*
1397 * Note : most of those values apply only for the receive path,
1398 * the transmit path will be set differently - Jean II
1399 */
1400 irda_qos_bits_to_value(&self->qos);
1401}
1402
1403/*------------------------------------------------------------------*/
Stephen Hemmingerd36733a2009-03-20 19:35:35 +00001404static const struct net_device_ops irda_usb_netdev_ops = {
1405 .ndo_open = irda_usb_net_open,
1406 .ndo_stop = irda_usb_net_close,
1407 .ndo_do_ioctl = irda_usb_net_ioctl,
1408 .ndo_start_xmit = irda_usb_hard_xmit,
1409 .ndo_tx_timeout = irda_usb_net_timeout,
1410};
1411
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412/*
1413 * Initialise the network side of the irda-usb instance
1414 * Called when a new USB instance is registered in irda_usb_probe()
1415 */
1416static inline int irda_usb_open(struct irda_usb_cb *self)
1417{
1418 struct net_device *netdev = self->netdev;
1419
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001420 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
Stephen Hemmingerd36733a2009-03-20 19:35:35 +00001422 netdev->netdev_ops = &irda_usb_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423
Stephen Hemmingerd36733a2009-03-20 19:35:35 +00001424 irda_usb_init_qos(self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
1426 return register_netdev(netdev);
1427}
1428
1429/*------------------------------------------------------------------*/
1430/*
1431 * Cleanup the network side of the irda-usb instance
1432 * Called when a USB instance is removed in irda_usb_disconnect()
1433 */
1434static inline void irda_usb_close(struct irda_usb_cb *self)
1435{
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001436 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437
1438 /* Remove netdevice */
1439 unregister_netdev(self->netdev);
1440
1441 /* Remove the speed buffer */
Jesper Juhlb4558ea2005-10-28 16:53:13 -04001442 kfree(self->speed_buff);
1443 self->speed_buff = NULL;
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001444
1445 kfree(self->tx_buff);
1446 self->tx_buff = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447}
1448
1449/********************** USB CONFIG SUBROUTINES **********************/
1450/*
1451 * Various subroutines dealing with USB stuff we use to configure and
1452 * initialise each irda-usb instance.
1453 * These functions are used below in the main calls of the driver...
1454 */
1455
1456/*------------------------------------------------------------------*/
1457/*
1458 * Function irda_usb_parse_endpoints(dev, ifnum)
1459 *
1460 * Parse the various endpoints and find the one we need.
1461 *
1462 * The endpoint are the pipes used to communicate with the USB device.
1463 * The spec defines 2 endpoints of type bulk transfer, one in, and one out.
1464 * These are used to pass frames back and forth with the dongle.
1465 * Most dongle have also an interrupt endpoint, that will be probably
1466 * documented in the next spec...
1467 */
1468static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum)
1469{
1470 int i; /* Endpoint index in table */
1471
1472 /* Init : no endpoints */
1473 self->bulk_in_ep = 0;
1474 self->bulk_out_ep = 0;
1475 self->bulk_int_ep = 0;
1476
1477 /* Let's look at all those endpoints */
1478 for(i = 0; i < ennum; i++) {
1479 /* All those variables will get optimised by the compiler,
1480 * so let's aim for clarity... - Jean II */
1481 __u8 ep; /* Endpoint address */
1482 __u8 dir; /* Endpoint direction */
1483 __u8 attr; /* Endpoint attribute */
1484 __u16 psize; /* Endpoint max packet size in bytes */
1485
1486 /* Get endpoint address, direction and attribute */
1487 ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1488 dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK;
1489 attr = endpoint[i].desc.bmAttributes;
1490 psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize);
1491
1492 /* Is it a bulk endpoint ??? */
1493 if(attr == USB_ENDPOINT_XFER_BULK) {
1494 /* We need to find an IN and an OUT */
1495 if(dir == USB_DIR_IN) {
1496 /* This is our Rx endpoint */
1497 self->bulk_in_ep = ep;
1498 } else {
1499 /* This is our Tx endpoint */
1500 self->bulk_out_ep = ep;
1501 self->bulk_out_mtu = psize;
1502 }
1503 } else {
1504 if((attr == USB_ENDPOINT_XFER_INT) &&
1505 (dir == USB_DIR_IN)) {
1506 /* This is our interrupt endpoint */
1507 self->bulk_int_ep = ep;
1508 } else {
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001509 IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __func__, ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 }
1511 }
1512 }
1513
1514 IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001515 __func__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516
1517 return((self->bulk_in_ep != 0) && (self->bulk_out_ep != 0));
1518}
1519
1520#ifdef IU_DUMP_CLASS_DESC
1521/*------------------------------------------------------------------*/
1522/*
1523 * Function usb_irda_dump_class_desc(desc)
1524 *
1525 * Prints out the contents of the IrDA class descriptor
1526 *
1527 */
1528static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
1529{
1530 /* Values are little endian */
1531 printk("bLength=%x\n", desc->bLength);
1532 printk("bDescriptorType=%x\n", desc->bDescriptorType);
1533 printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision));
1534 printk("bmDataSize=%x\n", desc->bmDataSize);
1535 printk("bmWindowSize=%x\n", desc->bmWindowSize);
1536 printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
1537 printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate));
1538 printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
1539 printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
1540 printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList);
1541}
1542#endif /* IU_DUMP_CLASS_DESC */
1543
1544/*------------------------------------------------------------------*/
1545/*
1546 * Function irda_usb_find_class_desc(intf)
1547 *
1548 * Returns instance of IrDA class descriptor, or NULL if not found
1549 *
1550 * The class descriptor is some extra info that IrDA USB devices will
1551 * offer to us, describing their IrDA characteristics. We will use that in
1552 * irda_usb_init_qos()
1553 */
1554static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf)
1555{
1556 struct usb_device *dev = interface_to_usbdev (intf);
1557 struct irda_class_desc *desc;
1558 int ret;
1559
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001560 desc = kzalloc(sizeof(*desc), GFP_KERNEL);
1561 if (!desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
1564 /* USB-IrDA class spec 1.0:
1565 * 6.1.3: Standard "Get Descriptor" Device Request is not
1566 * appropriate to retrieve class-specific descriptor
1567 * 6.2.5: Class Specific "Get Class Descriptor" Interface Request
1568 * is mandatory and returns the USB-IrDA class descriptor
1569 */
1570
1571 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
1572 IU_REQ_GET_CLASS_DESC,
1573 USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
1574 0, intf->altsetting->desc.bInterfaceNumber, desc,
1575 sizeof(*desc), 500);
1576
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001577 IRDA_DEBUG(1, "%s(), ret=%d\n", __func__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 if (ret < sizeof(*desc)) {
1579 IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n",
1580 (ret<0) ? "failed" : "too short", ret);
1581 }
1582 else if (desc->bDescriptorType != USB_DT_IRDA) {
1583 IRDA_WARNING("usb-irda: bad class_descriptor type\n");
1584 }
1585 else {
1586#ifdef IU_DUMP_CLASS_DESC
1587 irda_usb_dump_class_desc(desc);
1588#endif /* IU_DUMP_CLASS_DESC */
1589
1590 return desc;
1591 }
1592 kfree(desc);
1593 return NULL;
1594}
1595
1596/*********************** USB DEVICE CALLBACKS ***********************/
1597/*
1598 * Main calls from the USB subsystem.
1599 * Mostly registering a new irda-usb device and removing it....
1600 */
1601
1602/*------------------------------------------------------------------*/
1603/*
1604 * This routine is called by the USB subsystem for each new device
1605 * in the system. We need to check if the device is ours, and in
1606 * this case start handling it.
1607 * The USB layer protect us from reentrancy (via BKL), so we don't need
1608 * to spinlock in there... Jean II
1609 */
1610static int irda_usb_probe(struct usb_interface *intf,
1611 const struct usb_device_id *id)
1612{
1613 struct net_device *net;
1614 struct usb_device *dev = interface_to_usbdev(intf);
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001615 struct irda_usb_cb *self;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 struct usb_host_interface *interface;
1617 struct irda_class_desc *irda_desc;
1618 int ret = -ENOMEM;
1619 int i; /* Driver instance index / Rx URB index */
1620
1621 /* Note : the probe make sure to call us only for devices that
1622 * matches the list of dongle (top of the file). So, we
1623 * don't need to check if the dongle is really ours.
1624 * Jean II */
1625
1626 IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n",
1627 dev->devnum, le16_to_cpu(dev->descriptor.idVendor),
1628 le16_to_cpu(dev->descriptor.idProduct));
1629
1630 net = alloc_irdadev(sizeof(*self));
1631 if (!net)
1632 goto err_out;
1633
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 SET_NETDEV_DEV(net, &intf->dev);
Wang Chen4cf16532008-11-12 23:38:14 -08001635 self = netdev_priv(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 self->netdev = net;
1637 spin_lock_init(&self->lock);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001638 init_timer(&self->rx_defer_timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639
Samuel Ortiz137dc022006-04-05 22:39:14 -07001640 self->capability = id->driver_info;
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001641 self->needspatch = ((self->capability & IUC_STIR421X) != 0);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001642
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 /* Create all of the needed urbs */
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001644 if (self->capability & IUC_STIR421X) {
Samuel Ortiz137dc022006-04-05 22:39:14 -07001645 self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS;
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001646 self->header_length = USB_IRDA_STIR421X_HEADER;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001647 } else {
1648 self->max_rx_urb = IU_MAX_RX_URBS;
1649 self->header_length = USB_IRDA_HEADER;
1650 }
1651
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001652 self->rx_urb = kcalloc(self->max_rx_urb, sizeof(struct urb *),
Samuel Ortiz137dc022006-04-05 22:39:14 -07001653 GFP_KERNEL);
1654
1655 for (i = 0; i < self->max_rx_urb; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1657 if (!self->rx_urb[i]) {
1658 goto err_out_1;
1659 }
1660 }
1661 self->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1662 if (!self->tx_urb) {
1663 goto err_out_1;
1664 }
1665 self->speed_urb = usb_alloc_urb(0, GFP_KERNEL);
1666 if (!self->speed_urb) {
1667 goto err_out_2;
1668 }
1669
1670 /* Is this really necessary? (no, except maybe for broken devices) */
1671 if (usb_reset_configuration (dev) < 0) {
1672 err("reset_configuration failed");
1673 ret = -EIO;
1674 goto err_out_3;
1675 }
1676
1677 /* Is this really necessary? */
1678 /* Note : some driver do hardcode the interface number, some others
1679 * specify an alternate, but very few driver do like this.
1680 * Jean II */
1681 ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0);
1682 IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret);
1683 switch (ret) {
1684 case 0:
1685 break;
1686 case -EPIPE: /* -EPIPE = -32 */
1687 /* Martin Diehl says if we get a -EPIPE we should
1688 * be fine and we don't need to do a usb_clear_halt().
1689 * - Jean II */
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001690 IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691 break;
1692 default:
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001693 IRDA_DEBUG(0, "%s(), Unknown error %d\n", __func__, ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 ret = -EIO;
1695 goto err_out_3;
1696 }
1697
1698 /* Find our endpoints */
1699 interface = intf->cur_altsetting;
1700 if(!irda_usb_parse_endpoints(self, interface->endpoint,
1701 interface->desc.bNumEndpoints)) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001702 IRDA_ERROR("%s(), Bogus endpoints...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 ret = -EIO;
1704 goto err_out_3;
1705 }
1706
Samuel Ortiz137dc022006-04-05 22:39:14 -07001707 self->usbdev = dev;
1708
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 /* Find IrDA class descriptor */
1710 irda_desc = irda_usb_find_class_desc(intf);
1711 ret = -ENODEV;
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001712 if (!irda_desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 goto err_out_3;
1714
Samuel Ortiz137dc022006-04-05 22:39:14 -07001715 if (self->needspatch) {
1716 ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
Randy Dunlap0eb1bd22006-05-06 18:34:10 -07001717 0x02, 0x40, 0, 0, NULL, 0, 500);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001718 if (ret < 0) {
1719 IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
1720 goto err_out_3;
1721 } else {
1722 mdelay(10);
1723 }
1724 }
1725
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 self->irda_desc = irda_desc;
1727 self->present = 1;
1728 self->netopen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 self->usbintf = intf;
1730
1731 /* Allocate the buffer for speed changes */
1732 /* Don't change this buffer size and allocation without doing
1733 * some heavy and complete testing. Don't ask why :-(
1734 * Jean II */
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001735 self->speed_buff = kzalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL);
1736 if (!self->speed_buff)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 goto err_out_3;
1738
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001739 self->tx_buff = kzalloc(IRDA_SKB_MAX_MTU + self->header_length,
1740 GFP_KERNEL);
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001741 if (!self->tx_buff)
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001742 goto err_out_4;
1743
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 ret = irda_usb_open(self);
1745 if (ret)
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001746 goto err_out_5;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747
1748 IRDA_MESSAGE("IrDA: Registered device %s\n", net->name);
1749 usb_set_intfdata(intf, self);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001750
1751 if (self->needspatch) {
1752 /* Now we fetch and upload the firmware patch */
1753 ret = stir421x_patch_device(self);
1754 self->needspatch = (ret < 0);
Nick Fedchik8ef80ae2006-06-11 20:56:02 -07001755 if (self->needspatch) {
1756 IRDA_ERROR("STIR421X: Couldn't upload patch\n");
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001757 goto err_out_6;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001758 }
1759
1760 /* replace IrDA class descriptor with what patched device is now reporting */
1761 irda_desc = irda_usb_find_class_desc (self->usbintf);
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001762 if (!irda_desc) {
Samuel Ortiz137dc022006-04-05 22:39:14 -07001763 ret = -ENODEV;
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001764 goto err_out_6;
Samuel Ortiz137dc022006-04-05 22:39:14 -07001765 }
Mariusz Kozlowski48e3eeb2007-08-10 15:25:40 -07001766 kfree(self->irda_desc);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001767 self->irda_desc = irda_desc;
1768 irda_usb_init_qos(self);
1769 }
1770
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 return 0;
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001772err_out_6:
Samuel Ortiz269690a2006-04-14 16:02:07 -07001773 unregister_netdev(self->netdev);
Samuel Ortiz3958fb32007-01-15 19:37:25 -08001774err_out_5:
1775 kfree(self->tx_buff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776err_out_4:
1777 kfree(self->speed_buff);
1778err_out_3:
1779 /* Free all urbs that we may have created */
1780 usb_free_urb(self->speed_urb);
1781err_out_2:
1782 usb_free_urb(self->tx_urb);
1783err_out_1:
Mariusz Kozlowski8fd31e12006-11-08 15:35:38 +01001784 for (i = 0; i < self->max_rx_urb; i++)
1785 usb_free_urb(self->rx_urb[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786 free_netdev(net);
1787err_out:
1788 return ret;
1789}
1790
1791/*------------------------------------------------------------------*/
1792/*
1793 * The current irda-usb device is removed, the USB layer tell us
1794 * to shut it down...
1795 * One of the constraints is that when we exit this function,
1796 * we cannot use the usb_device no more. Gone. Destroyed. kfree().
1797 * Most other subsystem allow you to destroy the instance at a time
1798 * when it's convenient to you, to postpone it to a later date, but
1799 * not the USB subsystem.
1800 * So, we must make bloody sure that everything gets deactivated.
1801 * Jean II
1802 */
1803static void irda_usb_disconnect(struct usb_interface *intf)
1804{
1805 unsigned long flags;
1806 struct irda_usb_cb *self = usb_get_intfdata(intf);
1807 int i;
1808
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001809 IRDA_DEBUG(1, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810
1811 usb_set_intfdata(intf, NULL);
1812 if (!self)
1813 return;
1814
1815 /* Make sure that the Tx path is not executing. - Jean II */
1816 spin_lock_irqsave(&self->lock, flags);
1817
1818 /* Oups ! We are not there any more.
1819 * This will stop/desactivate the Tx path. - Jean II */
1820 self->present = 0;
1821
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001822 /* Kill defered Rx URB */
1823 del_timer(&self->rx_defer_timer);
1824
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 /* We need to have irq enabled to unlink the URBs. That's OK,
1826 * at this point the Tx path is gone - Jean II */
1827 spin_unlock_irqrestore(&self->lock, flags);
1828
1829 /* Hum... Check if networking is still active (avoid races) */
1830 if((self->netopen) || (self->irlap)) {
1831 /* Accept no more transmissions */
1832 /*netif_device_detach(self->netdev);*/
1833 netif_stop_queue(self->netdev);
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001834 /* Stop all the receive URBs. Must be synchronous. */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001835 for (i = 0; i < self->max_rx_urb; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 usb_kill_urb(self->rx_urb[i]);
1837 /* Cancel Tx and speed URB.
Jean Tourrilhes669d32a22006-02-19 22:28:25 -08001838 * Make sure it's synchronous to avoid races. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 usb_kill_urb(self->tx_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 usb_kill_urb(self->speed_urb);
1841 }
1842
1843 /* Cleanup the device stuff */
1844 irda_usb_close(self);
1845 /* No longer attached to USB bus */
1846 self->usbdev = NULL;
1847 self->usbintf = NULL;
1848
1849 /* Clean up our urbs */
Samuel Ortiz137dc022006-04-05 22:39:14 -07001850 for (i = 0; i < self->max_rx_urb; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 usb_free_urb(self->rx_urb[i]);
Samuel Ortiz137dc022006-04-05 22:39:14 -07001852 kfree(self->rx_urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853 /* Clean up Tx and speed URB */
1854 usb_free_urb(self->tx_urb);
1855 usb_free_urb(self->speed_urb);
1856
1857 /* Free self and network device */
1858 free_netdev(self->netdev);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001859 IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860}
1861
Tadashi Abee13f9312009-05-25 20:53:27 +00001862#ifdef CONFIG_PM
1863/* USB suspend, so power off the transmitter/receiver */
1864static int irda_usb_suspend(struct usb_interface *intf, pm_message_t message)
1865{
1866 struct irda_usb_cb *self = usb_get_intfdata(intf);
1867 int i;
1868
1869 netif_device_detach(self->netdev);
1870
1871 if (self->tx_urb != NULL)
1872 usb_kill_urb(self->tx_urb);
1873 if (self->speed_urb != NULL)
1874 usb_kill_urb(self->speed_urb);
1875 for (i = 0; i < self->max_rx_urb; i++) {
1876 if (self->rx_urb[i] != NULL)
1877 usb_kill_urb(self->rx_urb[i]);
1878 }
1879 return 0;
1880}
1881
1882/* Coming out of suspend, so reset hardware */
1883static int irda_usb_resume(struct usb_interface *intf)
1884{
1885 struct irda_usb_cb *self = usb_get_intfdata(intf);
1886 int i;
1887
1888 for (i = 0; i < self->max_rx_urb; i++) {
1889 if (self->rx_urb[i] != NULL)
1890 usb_submit_urb(self->rx_urb[i], GFP_KERNEL);
1891 }
1892
1893 netif_device_attach(self->netdev);
1894 return 0;
1895}
1896#endif
1897
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898/*------------------------------------------------------------------*/
1899/*
1900 * USB device callbacks
1901 */
1902static struct usb_driver irda_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 .name = "irda-usb",
1904 .probe = irda_usb_probe,
1905 .disconnect = irda_usb_disconnect,
1906 .id_table = dongles,
Tadashi Abee13f9312009-05-25 20:53:27 +00001907#ifdef CONFIG_PM
1908 .suspend = irda_usb_suspend,
1909 .resume = irda_usb_resume,
1910#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911};
1912
1913/************************* MODULE CALLBACKS *************************/
1914/*
1915 * Deal with module insertion/removal
1916 * Mostly tell USB about our existence
1917 */
1918
1919/*------------------------------------------------------------------*/
1920/*
1921 * Module insertion
1922 */
1923static int __init usb_irda_init(void)
1924{
1925 int ret;
1926
1927 ret = usb_register(&irda_driver);
1928 if (ret < 0)
1929 return ret;
1930
1931 IRDA_MESSAGE("USB IrDA support registered\n");
1932 return 0;
1933}
1934module_init(usb_irda_init);
1935
1936/*------------------------------------------------------------------*/
1937/*
1938 * Module removal
1939 */
1940static void __exit usb_irda_cleanup(void)
1941{
1942 /* Deregister the driver and remove all pending instances */
1943 usb_deregister(&irda_driver);
1944}
1945module_exit(usb_irda_cleanup);
1946
1947/*------------------------------------------------------------------*/
1948/*
1949 * Module parameters
1950 */
1951module_param(qos_mtt_bits, int, 0);
1952MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
Samuel Ortiz137dc022006-04-05 22:39:14 -07001953MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>");
1954MODULE_DESCRIPTION("IrDA-USB Dongle Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955MODULE_LICENSE("GPL");