]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /***************************************************************************** |
2 | * | |
3 | * Filename: irda-usb.c | |
4 | * Version: 0.9b | |
5 | * Description: IrDA-USB Driver | |
6 | * Status: Experimental | |
7 | * Author: Dag Brattli <dag@brattli.net> | |
8 | * | |
9 | * Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at> | |
10 | * Copyright (C) 2001, Dag Brattli <dag@brattli.net> | |
11 | * Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | * | |
27 | *****************************************************************************/ | |
28 | ||
29 | /* | |
30 | * IMPORTANT NOTE | |
31 | * -------------- | |
32 | * | |
33 | * As of kernel 2.5.20, this is the state of compliance and testing of | |
34 | * this driver (irda-usb) with regards to the USB low level drivers... | |
35 | * | |
36 | * This driver has been tested SUCCESSFULLY with the following drivers : | |
37 | * o usb-uhci-hcd (For Intel/Via USB controllers) | |
38 | * o uhci-hcd (Alternate/JE driver for Intel/Via USB controllers) | |
39 | * o ohci-hcd (For other USB controllers) | |
40 | * | |
41 | * This driver has NOT been tested with the following drivers : | |
42 | * o ehci-hcd (USB 2.0 controllers) | |
43 | * | |
44 | * Note that all HCD drivers do URB_ZERO_PACKET and timeout properly, | |
45 | * so we don't have to worry about that anymore. | |
46 | * One common problem is the failure to set the address on the dongle, | |
47 | * but this happens before the driver gets loaded... | |
48 | * | |
49 | * Jean II | |
50 | */ | |
51 | ||
52 | /*------------------------------------------------------------------*/ | |
53 | ||
54 | #include <linux/module.h> | |
55 | #include <linux/moduleparam.h> | |
56 | #include <linux/kernel.h> | |
57 | #include <linux/types.h> | |
58 | #include <linux/init.h> | |
59 | #include <linux/skbuff.h> | |
60 | #include <linux/netdevice.h> | |
61 | #include <linux/slab.h> | |
62 | #include <linux/rtnetlink.h> | |
63 | #include <linux/usb.h> | |
64 | ||
65 | #include "irda-usb.h" | |
66 | ||
67 | /*------------------------------------------------------------------*/ | |
68 | ||
69 | static int qos_mtt_bits = 0; | |
70 | ||
71 | /* These are the currently known IrDA USB dongles. Add new dongles here */ | |
72 | static struct usb_device_id dongles[] = { | |
73 | /* ACTiSYS Corp., ACT-IR2000U FIR-USB Adapter */ | |
74 | { USB_DEVICE(0x9c4, 0x011), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, | |
75 | /* Look like ACTiSYS, Report : IBM Corp., IBM UltraPort IrDA */ | |
76 | { USB_DEVICE(0x4428, 0x012), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, | |
77 | /* KC Technology Inc., KC-180 USB IrDA Device */ | |
78 | { USB_DEVICE(0x50f, 0x180), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, | |
79 | /* Extended Systems, Inc., XTNDAccess IrDA USB (ESI-9685) */ | |
80 | { USB_DEVICE(0x8e9, 0x100), .driver_info = IUC_SPEED_BUG | IUC_NO_WINDOW }, | |
81 | { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS | | |
82 | USB_DEVICE_ID_MATCH_INT_SUBCLASS, | |
83 | .bInterfaceClass = USB_CLASS_APP_SPEC, | |
84 | .bInterfaceSubClass = USB_CLASS_IRDA, | |
85 | .driver_info = IUC_DEFAULT, }, | |
86 | { }, /* The end */ | |
87 | }; | |
88 | ||
89 | /* | |
90 | * Important note : | |
91 | * Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed | |
92 | * using the "USB-IrDA specification" (yes, there exist such a thing), and | |
93 | * therefore not supported by this driver (don't add them above). | |
94 | * There is a Linux driver, stir4200, that support those USB devices. | |
95 | * Jean II | |
96 | */ | |
97 | ||
98 | MODULE_DEVICE_TABLE(usb, dongles); | |
99 | ||
100 | /*------------------------------------------------------------------*/ | |
101 | ||
102 | static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf); | |
103 | static void irda_usb_disconnect(struct usb_interface *intf); | |
104 | static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self); | |
105 | static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *dev); | |
106 | static int irda_usb_open(struct irda_usb_cb *self); | |
107 | static void irda_usb_close(struct irda_usb_cb *self); | |
108 | static void speed_bulk_callback(struct urb *urb, struct pt_regs *regs); | |
109 | static void write_bulk_callback(struct urb *urb, struct pt_regs *regs); | |
110 | static void irda_usb_receive(struct urb *urb, struct pt_regs *regs); | |
111 | static int irda_usb_net_open(struct net_device *dev); | |
112 | static int irda_usb_net_close(struct net_device *dev); | |
113 | static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
114 | static void irda_usb_net_timeout(struct net_device *dev); | |
115 | static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev); | |
116 | ||
117 | /************************ TRANSMIT ROUTINES ************************/ | |
118 | /* | |
119 | * Receive packets from the IrDA stack and send them on the USB pipe. | |
120 | * Handle speed change, timeout and lot's of ugliness... | |
121 | */ | |
122 | ||
123 | /*------------------------------------------------------------------*/ | |
124 | /* | |
125 | * Function irda_usb_build_header(self, skb, header) | |
126 | * | |
127 | * Builds USB-IrDA outbound header | |
128 | * | |
129 | * When we send an IrDA frame over an USB pipe, we add to it a 1 byte | |
130 | * header. This function create this header with the proper values. | |
131 | * | |
132 | * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2 | |
133 | * that the setting of the link speed and xbof number in this outbound header | |
134 | * should be applied *AFTER* the frame has been sent. | |
135 | * Unfortunately, some devices are not compliant with that... It seems that | |
136 | * reading the spec is far too difficult... | |
137 | * Jean II | |
138 | */ | |
139 | static void irda_usb_build_header(struct irda_usb_cb *self, | |
140 | __u8 *header, | |
141 | int force) | |
142 | { | |
143 | /* Set the negotiated link speed */ | |
144 | if (self->new_speed != -1) { | |
145 | /* Hum... Ugly hack :-( | |
146 | * Some device are not compliant with the spec and change | |
147 | * parameters *before* sending the frame. - Jean II | |
148 | */ | |
149 | if ((self->capability & IUC_SPEED_BUG) && | |
150 | (!force) && (self->speed != -1)) { | |
151 | /* No speed and xbofs change here | |
152 | * (we'll do it later in the write callback) */ | |
153 | IRDA_DEBUG(2, "%s(), not changing speed yet\n", __FUNCTION__); | |
154 | *header = 0; | |
155 | return; | |
156 | } | |
157 | ||
158 | IRDA_DEBUG(2, "%s(), changing speed to %d\n", __FUNCTION__, self->new_speed); | |
159 | self->speed = self->new_speed; | |
160 | /* We will do ` self->new_speed = -1; ' in the completion | |
161 | * handler just in case the current URB fail - Jean II */ | |
162 | ||
163 | switch (self->speed) { | |
164 | case 2400: | |
165 | *header = SPEED_2400; | |
166 | break; | |
167 | default: | |
168 | case 9600: | |
169 | *header = SPEED_9600; | |
170 | break; | |
171 | case 19200: | |
172 | *header = SPEED_19200; | |
173 | break; | |
174 | case 38400: | |
175 | *header = SPEED_38400; | |
176 | break; | |
177 | case 57600: | |
178 | *header = SPEED_57600; | |
179 | break; | |
180 | case 115200: | |
181 | *header = SPEED_115200; | |
182 | break; | |
183 | case 576000: | |
184 | *header = SPEED_576000; | |
185 | break; | |
186 | case 1152000: | |
187 | *header = SPEED_1152000; | |
188 | break; | |
189 | case 4000000: | |
190 | *header = SPEED_4000000; | |
191 | self->new_xbofs = 0; | |
192 | break; | |
193 | } | |
194 | } else | |
195 | /* No change */ | |
196 | *header = 0; | |
197 | ||
198 | /* Set the negotiated additional XBOFS */ | |
199 | if (self->new_xbofs != -1) { | |
200 | IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __FUNCTION__, self->new_xbofs); | |
201 | self->xbofs = self->new_xbofs; | |
202 | /* We will do ` self->new_xbofs = -1; ' in the completion | |
203 | * handler just in case the current URB fail - Jean II */ | |
204 | ||
205 | switch (self->xbofs) { | |
206 | case 48: | |
207 | *header |= 0x10; | |
208 | break; | |
209 | case 28: | |
210 | case 24: /* USB spec 1.0 says 24 */ | |
211 | *header |= 0x20; | |
212 | break; | |
213 | default: | |
214 | case 12: | |
215 | *header |= 0x30; | |
216 | break; | |
217 | case 5: /* Bug in IrLAP spec? (should be 6) */ | |
218 | case 6: | |
219 | *header |= 0x40; | |
220 | break; | |
221 | case 3: | |
222 | *header |= 0x50; | |
223 | break; | |
224 | case 2: | |
225 | *header |= 0x60; | |
226 | break; | |
227 | case 1: | |
228 | *header |= 0x70; | |
229 | break; | |
230 | case 0: | |
231 | *header |= 0x80; | |
232 | break; | |
233 | } | |
234 | } | |
235 | } | |
236 | ||
237 | /*------------------------------------------------------------------*/ | |
238 | /* | |
239 | * Send a command to change the speed of the dongle | |
240 | * Need to be called with spinlock on. | |
241 | */ | |
242 | static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self) | |
243 | { | |
244 | __u8 *frame; | |
245 | struct urb *urb; | |
246 | int ret; | |
247 | ||
248 | IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __FUNCTION__, | |
249 | self->new_speed, self->new_xbofs); | |
250 | ||
251 | /* Grab the speed URB */ | |
252 | urb = self->speed_urb; | |
253 | if (urb->status != 0) { | |
254 | IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__); | |
255 | return; | |
256 | } | |
257 | ||
258 | /* Allocate the fake frame */ | |
259 | frame = self->speed_buff; | |
260 | ||
261 | /* Set the new speed and xbofs in this fake frame */ | |
262 | irda_usb_build_header(self, frame, 1); | |
263 | ||
264 | /* Submit the 0 length IrDA frame to trigger new speed settings */ | |
265 | usb_fill_bulk_urb(urb, self->usbdev, | |
266 | usb_sndbulkpipe(self->usbdev, self->bulk_out_ep), | |
267 | frame, IRDA_USB_SPEED_MTU, | |
268 | speed_bulk_callback, self); | |
269 | urb->transfer_buffer_length = USB_IRDA_HEADER; | |
270 | urb->transfer_flags = URB_ASYNC_UNLINK; | |
271 | ||
272 | /* Irq disabled -> GFP_ATOMIC */ | |
273 | if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) { | |
274 | IRDA_WARNING("%s(), failed Speed URB\n", __FUNCTION__); | |
275 | } | |
276 | } | |
277 | ||
278 | /*------------------------------------------------------------------*/ | |
279 | /* | |
280 | * Speed URB callback | |
281 | * Now, we can only get called for the speed URB. | |
282 | */ | |
283 | static void speed_bulk_callback(struct urb *urb, struct pt_regs *regs) | |
284 | { | |
285 | struct irda_usb_cb *self = urb->context; | |
286 | ||
287 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
288 | ||
289 | /* We should always have a context */ | |
290 | IRDA_ASSERT(self != NULL, return;); | |
291 | /* We should always be called for the speed URB */ | |
292 | IRDA_ASSERT(urb == self->speed_urb, return;); | |
293 | ||
294 | /* Check for timeout and other USB nasties */ | |
295 | if (urb->status != 0) { | |
296 | /* I get a lot of -ECONNABORTED = -103 here - Jean II */ | |
297 | IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __FUNCTION__, urb->status, urb->transfer_flags); | |
298 | ||
299 | /* Don't do anything here, that might confuse the USB layer. | |
300 | * Instead, we will wait for irda_usb_net_timeout(), the | |
301 | * network layer watchdog, to fix the situation. | |
302 | * Jean II */ | |
303 | /* A reset of the dongle might be welcomed here - Jean II */ | |
304 | return; | |
305 | } | |
306 | ||
307 | /* urb is now available */ | |
308 | //urb->status = 0; -> tested above | |
309 | ||
310 | /* New speed and xbof is now commited in hardware */ | |
311 | self->new_speed = -1; | |
312 | self->new_xbofs = -1; | |
313 | ||
314 | /* Allow the stack to send more packets */ | |
315 | netif_wake_queue(self->netdev); | |
316 | } | |
317 | ||
318 | /*------------------------------------------------------------------*/ | |
319 | /* | |
320 | * Send an IrDA frame to the USB dongle (for transmission) | |
321 | */ | |
322 | static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *netdev) | |
323 | { | |
324 | struct irda_usb_cb *self = netdev->priv; | |
325 | struct urb *urb = self->tx_urb; | |
326 | unsigned long flags; | |
327 | s32 speed; | |
328 | s16 xbofs; | |
329 | int res, mtt; | |
330 | int err = 1; /* Failed */ | |
331 | ||
332 | IRDA_DEBUG(4, "%s() on %s\n", __FUNCTION__, netdev->name); | |
333 | ||
334 | netif_stop_queue(netdev); | |
335 | ||
336 | /* Protect us from USB callbacks, net watchdog and else. */ | |
337 | spin_lock_irqsave(&self->lock, flags); | |
338 | ||
339 | /* Check if the device is still there. | |
340 | * We need to check self->present under the spinlock because | |
341 | * of irda_usb_disconnect() is synchronous - Jean II */ | |
342 | if (!self->present) { | |
343 | IRDA_DEBUG(0, "%s(), Device is gone...\n", __FUNCTION__); | |
344 | goto drop; | |
345 | } | |
346 | ||
347 | /* Check if we need to change the number of xbofs */ | |
348 | xbofs = irda_get_next_xbofs(skb); | |
349 | if ((xbofs != self->xbofs) && (xbofs != -1)) { | |
350 | self->new_xbofs = xbofs; | |
351 | } | |
352 | ||
353 | /* Check if we need to change the speed */ | |
354 | speed = irda_get_next_speed(skb); | |
355 | if ((speed != self->speed) && (speed != -1)) { | |
356 | /* Set the desired speed */ | |
357 | self->new_speed = speed; | |
358 | ||
359 | /* Check for empty frame */ | |
360 | if (!skb->len) { | |
361 | /* IrLAP send us an empty frame to make us change the | |
362 | * speed. Changing speed with the USB adapter is in | |
363 | * fact sending an empty frame to the adapter, so we | |
364 | * could just let the present function do its job. | |
365 | * However, we would wait for min turn time, | |
366 | * do an extra memcpy and increment packet counters... | |
367 | * Jean II */ | |
368 | irda_usb_change_speed_xbofs(self); | |
369 | netdev->trans_start = jiffies; | |
370 | /* Will netif_wake_queue() in callback */ | |
371 | err = 0; /* No error */ | |
372 | goto drop; | |
373 | } | |
374 | } | |
375 | ||
376 | if (urb->status != 0) { | |
377 | IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__); | |
378 | goto drop; | |
379 | } | |
380 | ||
381 | /* Make sure there is room for IrDA-USB header. The actual | |
382 | * allocation will be done lower in skb_push(). | |
383 | * Also, we don't use directly skb_cow(), because it require | |
384 | * headroom >= 16, which force unnecessary copies - Jean II */ | |
385 | if (skb_headroom(skb) < USB_IRDA_HEADER) { | |
386 | IRDA_DEBUG(0, "%s(), Insuficient skb headroom.\n", __FUNCTION__); | |
387 | if (skb_cow(skb, USB_IRDA_HEADER)) { | |
388 | IRDA_WARNING("%s(), failed skb_cow() !!!\n", __FUNCTION__); | |
389 | goto drop; | |
390 | } | |
391 | } | |
392 | ||
393 | /* Change setting for next frame */ | |
394 | irda_usb_build_header(self, skb_push(skb, USB_IRDA_HEADER), 0); | |
395 | ||
396 | /* FIXME: Make macro out of this one */ | |
397 | ((struct irda_skb_cb *)skb->cb)->context = self; | |
398 | ||
399 | usb_fill_bulk_urb(urb, self->usbdev, | |
400 | usb_sndbulkpipe(self->usbdev, self->bulk_out_ep), | |
401 | skb->data, IRDA_SKB_MAX_MTU, | |
402 | write_bulk_callback, skb); | |
403 | urb->transfer_buffer_length = skb->len; | |
404 | /* Note : unlink *must* be Asynchronous because of the code in | |
405 | * irda_usb_net_timeout() -> call in irq - Jean II */ | |
406 | urb->transfer_flags = URB_ASYNC_UNLINK; | |
407 | /* This flag (URB_ZERO_PACKET) indicates that what we send is not | |
408 | * a continuous stream of data but separate packets. | |
409 | * In this case, the USB layer will insert an empty USB frame (TD) | |
410 | * after each of our packets that is exact multiple of the frame size. | |
411 | * This is how the dongle will detect the end of packet - Jean II */ | |
412 | urb->transfer_flags |= URB_ZERO_PACKET; | |
413 | ||
414 | /* Generate min turn time. FIXME: can we do better than this? */ | |
415 | /* Trying to a turnaround time at this level is trying to measure | |
416 | * processor clock cycle with a wrist-watch, approximate at best... | |
417 | * | |
418 | * What we know is the last time we received a frame over USB. | |
419 | * Due to latency over USB that depend on the USB load, we don't | |
420 | * know when this frame was received over IrDA (a few ms before ?) | |
421 | * Then, same story for our outgoing frame... | |
422 | * | |
423 | * In theory, the USB dongle is supposed to handle the turnaround | |
424 | * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's | |
425 | * why this code is enabled only for dongles that doesn't meet | |
426 | * the spec. | |
427 | * Jean II */ | |
428 | if (self->capability & IUC_NO_TURN) { | |
429 | mtt = irda_get_mtt(skb); | |
430 | if (mtt) { | |
431 | int diff; | |
432 | do_gettimeofday(&self->now); | |
433 | diff = self->now.tv_usec - self->stamp.tv_usec; | |
434 | #ifdef IU_USB_MIN_RTT | |
435 | /* Factor in USB delays -> Get rid of udelay() that | |
436 | * would be lost in the noise - Jean II */ | |
437 | diff += IU_USB_MIN_RTT; | |
438 | #endif /* IU_USB_MIN_RTT */ | |
439 | /* If the usec counter did wraparound, the diff will | |
440 | * go negative (tv_usec is a long), so we need to | |
441 | * correct it by one second. Jean II */ | |
442 | if (diff < 0) | |
443 | diff += 1000000; | |
444 | ||
445 | /* Check if the mtt is larger than the time we have | |
446 | * already used by all the protocol processing | |
447 | */ | |
448 | if (mtt > diff) { | |
449 | mtt -= diff; | |
450 | if (mtt > 1000) | |
451 | mdelay(mtt/1000); | |
452 | else | |
453 | udelay(mtt); | |
454 | } | |
455 | } | |
456 | } | |
457 | ||
458 | /* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */ | |
459 | if ((res = usb_submit_urb(urb, GFP_ATOMIC))) { | |
460 | IRDA_WARNING("%s(), failed Tx URB\n", __FUNCTION__); | |
461 | self->stats.tx_errors++; | |
462 | /* Let USB recover : We will catch that in the watchdog */ | |
463 | /*netif_start_queue(netdev);*/ | |
464 | } else { | |
465 | /* Increment packet stats */ | |
466 | self->stats.tx_packets++; | |
467 | self->stats.tx_bytes += skb->len; | |
468 | ||
469 | netdev->trans_start = jiffies; | |
470 | } | |
471 | spin_unlock_irqrestore(&self->lock, flags); | |
472 | ||
473 | return 0; | |
474 | ||
475 | drop: | |
476 | /* Drop silently the skb and exit */ | |
477 | dev_kfree_skb(skb); | |
478 | spin_unlock_irqrestore(&self->lock, flags); | |
479 | return err; /* Usually 1 */ | |
480 | } | |
481 | ||
482 | /*------------------------------------------------------------------*/ | |
483 | /* | |
484 | * Note : this function will be called only for tx_urb... | |
485 | */ | |
486 | static void write_bulk_callback(struct urb *urb, struct pt_regs *regs) | |
487 | { | |
488 | unsigned long flags; | |
489 | struct sk_buff *skb = urb->context; | |
490 | struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context; | |
491 | ||
492 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
493 | ||
494 | /* We should always have a context */ | |
495 | IRDA_ASSERT(self != NULL, return;); | |
496 | /* We should always be called for the speed URB */ | |
497 | IRDA_ASSERT(urb == self->tx_urb, return;); | |
498 | ||
499 | /* Free up the skb */ | |
500 | dev_kfree_skb_any(skb); | |
501 | urb->context = NULL; | |
502 | ||
503 | /* Check for timeout and other USB nasties */ | |
504 | if (urb->status != 0) { | |
505 | /* I get a lot of -ECONNABORTED = -103 here - Jean II */ | |
506 | IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __FUNCTION__, urb->status, urb->transfer_flags); | |
507 | ||
508 | /* Don't do anything here, that might confuse the USB layer, | |
509 | * and we could go in recursion and blow the kernel stack... | |
510 | * Instead, we will wait for irda_usb_net_timeout(), the | |
511 | * network layer watchdog, to fix the situation. | |
512 | * Jean II */ | |
513 | /* A reset of the dongle might be welcomed here - Jean II */ | |
514 | return; | |
515 | } | |
516 | ||
517 | /* urb is now available */ | |
518 | //urb->status = 0; -> tested above | |
519 | ||
520 | /* Make sure we read self->present properly */ | |
521 | spin_lock_irqsave(&self->lock, flags); | |
522 | ||
523 | /* If the network is closed, stop everything */ | |
524 | if ((!self->netopen) || (!self->present)) { | |
525 | IRDA_DEBUG(0, "%s(), Network is gone...\n", __FUNCTION__); | |
526 | spin_unlock_irqrestore(&self->lock, flags); | |
527 | return; | |
528 | } | |
529 | ||
530 | /* If changes to speed or xbofs is pending... */ | |
531 | if ((self->new_speed != -1) || (self->new_xbofs != -1)) { | |
532 | if ((self->new_speed != self->speed) || | |
533 | (self->new_xbofs != self->xbofs)) { | |
534 | /* We haven't changed speed yet (because of | |
535 | * IUC_SPEED_BUG), so do it now - Jean II */ | |
536 | IRDA_DEBUG(1, "%s(), Changing speed now...\n", __FUNCTION__); | |
537 | irda_usb_change_speed_xbofs(self); | |
538 | } else { | |
539 | /* New speed and xbof is now commited in hardware */ | |
540 | self->new_speed = -1; | |
541 | self->new_xbofs = -1; | |
542 | /* Done, waiting for next packet */ | |
543 | netif_wake_queue(self->netdev); | |
544 | } | |
545 | } else { | |
546 | /* Otherwise, allow the stack to send more packets */ | |
547 | netif_wake_queue(self->netdev); | |
548 | } | |
549 | spin_unlock_irqrestore(&self->lock, flags); | |
550 | } | |
551 | ||
552 | /*------------------------------------------------------------------*/ | |
553 | /* | |
554 | * Watchdog timer from the network layer. | |
555 | * After a predetermined timeout, if we don't give confirmation that | |
556 | * the packet has been sent (i.e. no call to netif_wake_queue()), | |
557 | * the network layer will call this function. | |
558 | * Note that URB that we submit have also a timeout. When the URB timeout | |
559 | * expire, the normal URB callback is called (write_bulk_callback()). | |
560 | */ | |
561 | static void irda_usb_net_timeout(struct net_device *netdev) | |
562 | { | |
563 | unsigned long flags; | |
564 | struct irda_usb_cb *self = netdev->priv; | |
565 | struct urb *urb; | |
566 | int done = 0; /* If we have made any progress */ | |
567 | ||
568 | IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __FUNCTION__); | |
569 | IRDA_ASSERT(self != NULL, return;); | |
570 | ||
571 | /* Protect us from USB callbacks, net Tx and else. */ | |
572 | spin_lock_irqsave(&self->lock, flags); | |
573 | ||
574 | /* self->present *MUST* be read under spinlock */ | |
575 | if (!self->present) { | |
576 | IRDA_WARNING("%s(), device not present!\n", __FUNCTION__); | |
577 | netif_stop_queue(netdev); | |
578 | spin_unlock_irqrestore(&self->lock, flags); | |
579 | return; | |
580 | } | |
581 | ||
582 | /* Check speed URB */ | |
583 | urb = self->speed_urb; | |
584 | if (urb->status != 0) { | |
585 | IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags); | |
586 | ||
587 | switch (urb->status) { | |
588 | case -EINPROGRESS: | |
589 | usb_unlink_urb(urb); | |
590 | /* Note : above will *NOT* call netif_wake_queue() | |
591 | * in completion handler, we will come back here. | |
592 | * Jean II */ | |
593 | done = 1; | |
594 | break; | |
595 | case -ECONNABORTED: /* -103 */ | |
596 | case -ECONNRESET: /* -104 */ | |
597 | case -ETIMEDOUT: /* -110 */ | |
598 | case -ENOENT: /* -2 (urb unlinked by us) */ | |
599 | default: /* ??? - Play safe */ | |
600 | urb->status = 0; | |
601 | netif_wake_queue(self->netdev); | |
602 | done = 1; | |
603 | break; | |
604 | } | |
605 | } | |
606 | ||
607 | /* Check Tx URB */ | |
608 | urb = self->tx_urb; | |
609 | if (urb->status != 0) { | |
610 | struct sk_buff *skb = urb->context; | |
611 | ||
612 | IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags); | |
613 | ||
614 | /* Increase error count */ | |
615 | self->stats.tx_errors++; | |
616 | ||
617 | #ifdef IU_BUG_KICK_TIMEOUT | |
618 | /* Can't be a bad idea to reset the speed ;-) - Jean II */ | |
619 | if(self->new_speed == -1) | |
620 | self->new_speed = self->speed; | |
621 | if(self->new_xbofs == -1) | |
622 | self->new_xbofs = self->xbofs; | |
623 | irda_usb_change_speed_xbofs(self); | |
624 | #endif /* IU_BUG_KICK_TIMEOUT */ | |
625 | ||
626 | switch (urb->status) { | |
627 | case -EINPROGRESS: | |
628 | usb_unlink_urb(urb); | |
629 | /* Note : above will *NOT* call netif_wake_queue() | |
630 | * in completion handler, because urb->status will | |
631 | * be -ENOENT. We will fix that at the next watchdog, | |
632 | * leaving more time to USB to recover... | |
633 | * Also, we are in interrupt, so we need to have | |
634 | * URB_ASYNC_UNLINK to work properly... | |
635 | * Jean II */ | |
636 | done = 1; | |
637 | break; | |
638 | case -ECONNABORTED: /* -103 */ | |
639 | case -ECONNRESET: /* -104 */ | |
640 | case -ETIMEDOUT: /* -110 */ | |
641 | case -ENOENT: /* -2 (urb unlinked by us) */ | |
642 | default: /* ??? - Play safe */ | |
643 | if(skb != NULL) { | |
644 | dev_kfree_skb_any(skb); | |
645 | urb->context = NULL; | |
646 | } | |
647 | urb->status = 0; | |
648 | netif_wake_queue(self->netdev); | |
649 | done = 1; | |
650 | break; | |
651 | } | |
652 | } | |
653 | spin_unlock_irqrestore(&self->lock, flags); | |
654 | ||
655 | /* Maybe we need a reset */ | |
656 | /* Note : Some drivers seem to use a usb_set_interface() when they | |
657 | * need to reset the hardware. Hum... | |
658 | */ | |
659 | ||
660 | /* if(done == 0) */ | |
661 | } | |
662 | ||
663 | /************************* RECEIVE ROUTINES *************************/ | |
664 | /* | |
665 | * Receive packets from the USB layer stack and pass them to the IrDA stack. | |
666 | * Try to work around USB failures... | |
667 | */ | |
668 | ||
669 | /* | |
670 | * Note : | |
671 | * Some of you may have noticed that most dongle have an interrupt in pipe | |
672 | * that we don't use. Here is the little secret... | |
673 | * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic | |
674 | * in every USB frame. This is unnecessary overhead. | |
675 | * The interrupt in pipe will generate an event every time a packet is | |
676 | * received. Reading an interrupt pipe adds minimal overhead, but has some | |
677 | * latency (~1ms). | |
678 | * If we are connected (speed != 9600), we want to minimise latency, so | |
679 | * we just always hang the Rx URB and ignore the interrupt. | |
680 | * If we are not connected (speed == 9600), there is usually no Rx traffic, | |
681 | * and we want to minimise the USB overhead. In this case we should wait | |
682 | * on the interrupt pipe and hang the Rx URB only when an interrupt is | |
683 | * received. | |
684 | * Jean II | |
685 | */ | |
686 | ||
687 | /*------------------------------------------------------------------*/ | |
688 | /* | |
689 | * Submit a Rx URB to the USB layer to handle reception of a frame | |
690 | * Mostly called by the completion callback of the previous URB. | |
691 | * | |
692 | * Jean II | |
693 | */ | |
694 | static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb) | |
695 | { | |
696 | struct irda_skb_cb *cb; | |
697 | int ret; | |
698 | ||
699 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
700 | ||
701 | /* This should never happen */ | |
702 | IRDA_ASSERT(skb != NULL, return;); | |
703 | IRDA_ASSERT(urb != NULL, return;); | |
704 | ||
705 | /* Save ourselves in the skb */ | |
706 | cb = (struct irda_skb_cb *) skb->cb; | |
707 | cb->context = self; | |
708 | ||
709 | /* Reinitialize URB */ | |
710 | usb_fill_bulk_urb(urb, self->usbdev, | |
711 | usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep), | |
712 | skb->data, skb->truesize, | |
713 | irda_usb_receive, skb); | |
714 | /* Note : unlink *must* be synchronous because of the code in | |
715 | * irda_usb_net_close() -> free the skb - Jean II */ | |
716 | urb->status = 0; | |
717 | ||
718 | /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */ | |
719 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
720 | if (ret) { | |
721 | /* If this ever happen, we are in deep s***. | |
722 | * Basically, the Rx path will stop... */ | |
723 | IRDA_WARNING("%s(), Failed to submit Rx URB %d\n", | |
724 | __FUNCTION__, ret); | |
725 | } | |
726 | } | |
727 | ||
728 | /*------------------------------------------------------------------*/ | |
729 | /* | |
730 | * Function irda_usb_receive(urb) | |
731 | * | |
732 | * Called by the USB subsystem when a frame has been received | |
733 | * | |
734 | */ | |
735 | static void irda_usb_receive(struct urb *urb, struct pt_regs *regs) | |
736 | { | |
737 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
738 | struct irda_usb_cb *self; | |
739 | struct irda_skb_cb *cb; | |
740 | struct sk_buff *newskb; | |
741 | struct sk_buff *dataskb; | |
742 | int docopy; | |
743 | ||
744 | IRDA_DEBUG(2, "%s(), len=%d\n", __FUNCTION__, urb->actual_length); | |
745 | ||
746 | /* Find ourselves */ | |
747 | cb = (struct irda_skb_cb *) skb->cb; | |
748 | IRDA_ASSERT(cb != NULL, return;); | |
749 | self = (struct irda_usb_cb *) cb->context; | |
750 | IRDA_ASSERT(self != NULL, return;); | |
751 | ||
752 | /* If the network is closed or the device gone, stop everything */ | |
753 | if ((!self->netopen) || (!self->present)) { | |
754 | IRDA_DEBUG(0, "%s(), Network is gone!\n", __FUNCTION__); | |
755 | /* Don't re-submit the URB : will stall the Rx path */ | |
756 | return; | |
757 | } | |
758 | ||
759 | /* Check the status */ | |
760 | if (urb->status != 0) { | |
761 | switch (urb->status) { | |
762 | case -EILSEQ: | |
763 | self->stats.rx_errors++; | |
764 | self->stats.rx_crc_errors++; | |
765 | break; | |
766 | case -ECONNRESET: /* -104 */ | |
767 | IRDA_DEBUG(0, "%s(), Connection Reset (-104), transfer_flags 0x%04X \n", __FUNCTION__, urb->transfer_flags); | |
768 | /* uhci_cleanup_unlink() is going to kill the Rx | |
769 | * URB just after we return. No problem, at this | |
770 | * point the URB will be idle ;-) - Jean II */ | |
771 | break; | |
772 | default: | |
773 | IRDA_DEBUG(0, "%s(), RX status %d,transfer_flags 0x%04X \n", __FUNCTION__, urb->status, urb->transfer_flags); | |
774 | break; | |
775 | } | |
776 | goto done; | |
777 | } | |
778 | ||
779 | /* Check for empty frames */ | |
780 | if (urb->actual_length <= USB_IRDA_HEADER) { | |
781 | IRDA_WARNING("%s(), empty frame!\n", __FUNCTION__); | |
782 | goto done; | |
783 | } | |
784 | ||
785 | /* | |
786 | * Remember the time we received this frame, so we can | |
787 | * reduce the min turn time a bit since we will know | |
788 | * how much time we have used for protocol processing | |
789 | */ | |
790 | do_gettimeofday(&self->stamp); | |
791 | ||
792 | /* Check if we need to copy the data to a new skb or not. | |
793 | * For most frames, we use ZeroCopy and pass the already | |
794 | * allocated skb up the stack. | |
795 | * If the frame is small, it is more efficient to copy it | |
796 | * to save memory (copy will be fast anyway - that's | |
797 | * called Rx-copy-break). Jean II */ | |
798 | docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD); | |
799 | ||
800 | /* Allocate a new skb */ | |
801 | newskb = dev_alloc_skb(docopy ? urb->actual_length : IRDA_SKB_MAX_MTU); | |
802 | if (!newskb) { | |
803 | self->stats.rx_dropped++; | |
804 | /* We could deliver the current skb, but this would stall | |
805 | * the Rx path. Better drop the packet... Jean II */ | |
806 | goto done; | |
807 | } | |
808 | ||
809 | /* Make sure IP header get aligned (IrDA header is 5 bytes) */ | |
810 | /* But IrDA-USB header is 1 byte. Jean II */ | |
811 | //skb_reserve(newskb, USB_IRDA_HEADER - 1); | |
812 | ||
813 | if(docopy) { | |
814 | /* Copy packet, so we can recycle the original */ | |
815 | memcpy(newskb->data, skb->data, urb->actual_length); | |
816 | /* Deliver this new skb */ | |
817 | dataskb = newskb; | |
818 | /* And hook the old skb to the URB | |
819 | * Note : we don't need to "clean up" the old skb, | |
820 | * as we never touched it. Jean II */ | |
821 | } else { | |
822 | /* We are using ZeroCopy. Deliver old skb */ | |
823 | dataskb = skb; | |
824 | /* And hook the new skb to the URB */ | |
825 | skb = newskb; | |
826 | } | |
827 | ||
828 | /* Set proper length on skb & remove USB-IrDA header */ | |
829 | skb_put(dataskb, urb->actual_length); | |
830 | skb_pull(dataskb, USB_IRDA_HEADER); | |
831 | ||
832 | /* Ask the networking layer to queue the packet for the IrDA stack */ | |
833 | dataskb->dev = self->netdev; | |
834 | dataskb->mac.raw = dataskb->data; | |
835 | dataskb->protocol = htons(ETH_P_IRDA); | |
836 | netif_rx(dataskb); | |
837 | ||
838 | /* Keep stats up to date */ | |
839 | self->stats.rx_bytes += dataskb->len; | |
840 | self->stats.rx_packets++; | |
841 | self->netdev->last_rx = jiffies; | |
842 | ||
843 | done: | |
844 | /* Note : at this point, the URB we've just received (urb) | |
845 | * is still referenced by the USB layer. For example, if we | |
846 | * have received a -ECONNRESET, uhci_cleanup_unlink() will | |
847 | * continue to process it (in fact, cleaning it up). | |
848 | * If we were to submit this URB, disaster would ensue. | |
849 | * Therefore, we submit our idle URB, and put this URB in our | |
850 | * idle slot.... | |
851 | * Jean II */ | |
852 | /* Note : with this scheme, we could submit the idle URB before | |
853 | * processing the Rx URB. Another time... Jean II */ | |
854 | ||
855 | /* Submit the idle URB to replace the URB we've just received */ | |
856 | irda_usb_submit(self, skb, self->idle_rx_urb); | |
857 | /* Recycle Rx URB : Now, the idle URB is the present one */ | |
858 | urb->context = NULL; | |
859 | self->idle_rx_urb = urb; | |
860 | } | |
861 | ||
862 | /*------------------------------------------------------------------*/ | |
863 | /* | |
864 | * Callbak from IrDA layer. IrDA wants to know if we have | |
865 | * started receiving anything. | |
866 | */ | |
867 | static int irda_usb_is_receiving(struct irda_usb_cb *self) | |
868 | { | |
869 | /* Note : because of the way UHCI works, it's almost impossible | |
870 | * to get this info. The Controller DMA directly to memory and | |
871 | * signal only when the whole frame is finished. To know if the | |
872 | * first TD of the URB has been filled or not seems hard work... | |
873 | * | |
874 | * The other solution would be to use the "receiving" command | |
875 | * on the default decriptor with a usb_control_msg(), but that | |
876 | * would add USB traffic and would return result only in the | |
877 | * next USB frame (~1ms). | |
878 | * | |
879 | * I've been told that current dongles send status info on their | |
880 | * interrupt endpoint, and that's what the Windows driver uses | |
881 | * to know this info. Unfortunately, this is not yet in the spec... | |
882 | * | |
883 | * Jean II | |
884 | */ | |
885 | ||
886 | return 0; /* For now */ | |
887 | } | |
888 | ||
889 | /********************** IRDA DEVICE CALLBACKS **********************/ | |
890 | /* | |
891 | * Main calls from the IrDA/Network subsystem. | |
892 | * Mostly registering a new irda-usb device and removing it.... | |
893 | * We only deal with the IrDA side of the business, the USB side will | |
894 | * be dealt with below... | |
895 | */ | |
896 | ||
897 | ||
898 | /*------------------------------------------------------------------*/ | |
899 | /* | |
900 | * Function irda_usb_net_open (dev) | |
901 | * | |
902 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" | |
903 | * | |
904 | * Note : don't mess with self->netopen - Jean II | |
905 | */ | |
906 | static int irda_usb_net_open(struct net_device *netdev) | |
907 | { | |
908 | struct irda_usb_cb *self; | |
909 | char hwname[16]; | |
910 | int i; | |
911 | ||
912 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
913 | ||
914 | IRDA_ASSERT(netdev != NULL, return -1;); | |
915 | self = (struct irda_usb_cb *) netdev->priv; | |
916 | IRDA_ASSERT(self != NULL, return -1;); | |
917 | ||
918 | /* Can only open the device if it's there */ | |
919 | if(!self->present) { | |
920 | IRDA_WARNING("%s(), device not present!\n", __FUNCTION__); | |
921 | return -1; | |
922 | } | |
923 | ||
924 | /* Initialise default speed and xbofs value | |
925 | * (IrLAP will change that soon) */ | |
926 | self->speed = -1; | |
927 | self->xbofs = -1; | |
928 | self->new_speed = -1; | |
929 | self->new_xbofs = -1; | |
930 | ||
931 | /* To do *before* submitting Rx urbs and starting net Tx queue | |
932 | * Jean II */ | |
933 | self->netopen = 1; | |
934 | ||
935 | /* | |
936 | * Now that everything should be initialized properly, | |
937 | * Open new IrLAP layer instance to take care of us... | |
938 | * Note : will send immediately a speed change... | |
939 | */ | |
940 | sprintf(hwname, "usb#%d", self->usbdev->devnum); | |
941 | self->irlap = irlap_open(netdev, &self->qos, hwname); | |
942 | IRDA_ASSERT(self->irlap != NULL, return -1;); | |
943 | ||
944 | /* Allow IrLAP to send data to us */ | |
945 | netif_start_queue(netdev); | |
946 | ||
947 | /* We submit all the Rx URB except for one that we keep idle. | |
948 | * Need to be initialised before submitting other USBs, because | |
949 | * in some cases as soon as we submit the URBs the USB layer | |
950 | * will trigger a dummy receive - Jean II */ | |
951 | self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS]; | |
952 | self->idle_rx_urb->context = NULL; | |
953 | ||
954 | /* Now that we can pass data to IrLAP, allow the USB layer | |
955 | * to send us some data... */ | |
956 | for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) { | |
957 | struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | |
958 | if (!skb) { | |
959 | /* If this ever happen, we are in deep s***. | |
960 | * Basically, we can't start the Rx path... */ | |
961 | IRDA_WARNING("%s(), Failed to allocate Rx skb\n", | |
962 | __FUNCTION__); | |
963 | return -1; | |
964 | } | |
965 | //skb_reserve(newskb, USB_IRDA_HEADER - 1); | |
966 | irda_usb_submit(self, skb, self->rx_urb[i]); | |
967 | } | |
968 | ||
969 | /* Ready to play !!! */ | |
970 | return 0; | |
971 | } | |
972 | ||
973 | /*------------------------------------------------------------------*/ | |
974 | /* | |
975 | * Function irda_usb_net_close (self) | |
976 | * | |
977 | * Network device is taken down. Usually this is done by | |
978 | * "ifconfig irda0 down" | |
979 | */ | |
980 | static int irda_usb_net_close(struct net_device *netdev) | |
981 | { | |
982 | struct irda_usb_cb *self; | |
983 | int i; | |
984 | ||
985 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
986 | ||
987 | IRDA_ASSERT(netdev != NULL, return -1;); | |
988 | self = (struct irda_usb_cb *) netdev->priv; | |
989 | IRDA_ASSERT(self != NULL, return -1;); | |
990 | ||
991 | /* Clear this flag *before* unlinking the urbs and *before* | |
992 | * stopping the network Tx queue - Jean II */ | |
993 | self->netopen = 0; | |
994 | ||
995 | /* Stop network Tx queue */ | |
996 | netif_stop_queue(netdev); | |
997 | ||
998 | /* Deallocate all the Rx path buffers (URBs and skb) */ | |
999 | for (i = 0; i < IU_MAX_RX_URBS; i++) { | |
1000 | struct urb *urb = self->rx_urb[i]; | |
1001 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1002 | /* Cancel the receive command */ | |
1003 | usb_kill_urb(urb); | |
1004 | /* The skb is ours, free it */ | |
1005 | if(skb) { | |
1006 | dev_kfree_skb(skb); | |
1007 | urb->context = NULL; | |
1008 | } | |
1009 | } | |
1010 | /* Cancel Tx and speed URB - need to be synchronous to avoid races */ | |
1011 | self->tx_urb->transfer_flags &= ~URB_ASYNC_UNLINK; | |
1012 | usb_kill_urb(self->tx_urb); | |
1013 | self->speed_urb->transfer_flags &= ~URB_ASYNC_UNLINK; | |
1014 | usb_kill_urb(self->speed_urb); | |
1015 | ||
1016 | /* Stop and remove instance of IrLAP */ | |
1017 | if (self->irlap) | |
1018 | irlap_close(self->irlap); | |
1019 | self->irlap = NULL; | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | /*------------------------------------------------------------------*/ | |
1025 | /* | |
1026 | * IOCTLs : Extra out-of-band network commands... | |
1027 | */ | |
1028 | static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
1029 | { | |
1030 | unsigned long flags; | |
1031 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
1032 | struct irda_usb_cb *self; | |
1033 | int ret = 0; | |
1034 | ||
1035 | IRDA_ASSERT(dev != NULL, return -1;); | |
1036 | self = dev->priv; | |
1037 | IRDA_ASSERT(self != NULL, return -1;); | |
1038 | ||
1039 | IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd); | |
1040 | ||
1041 | switch (cmd) { | |
1042 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
1043 | if (!capable(CAP_NET_ADMIN)) | |
1044 | return -EPERM; | |
1045 | /* Protect us from USB callbacks, net watchdog and else. */ | |
1046 | spin_lock_irqsave(&self->lock, flags); | |
1047 | /* Check if the device is still there */ | |
1048 | if(self->present) { | |
1049 | /* Set the desired speed */ | |
1050 | self->new_speed = irq->ifr_baudrate; | |
1051 | irda_usb_change_speed_xbofs(self); | |
1052 | } | |
1053 | spin_unlock_irqrestore(&self->lock, flags); | |
1054 | break; | |
1055 | case SIOCSMEDIABUSY: /* Set media busy */ | |
1056 | if (!capable(CAP_NET_ADMIN)) | |
1057 | return -EPERM; | |
1058 | /* Check if the IrDA stack is still there */ | |
1059 | if(self->netopen) | |
1060 | irda_device_set_media_busy(self->netdev, TRUE); | |
1061 | break; | |
1062 | case SIOCGRECEIVING: /* Check if we are receiving right now */ | |
1063 | irq->ifr_receiving = irda_usb_is_receiving(self); | |
1064 | break; | |
1065 | default: | |
1066 | ret = -EOPNOTSUPP; | |
1067 | } | |
1068 | ||
1069 | return ret; | |
1070 | } | |
1071 | ||
1072 | /*------------------------------------------------------------------*/ | |
1073 | /* | |
1074 | * Get device stats (for /proc/net/dev and ifconfig) | |
1075 | */ | |
1076 | static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev) | |
1077 | { | |
1078 | struct irda_usb_cb *self = dev->priv; | |
1079 | return &self->stats; | |
1080 | } | |
1081 | ||
1082 | /********************* IRDA CONFIG SUBROUTINES *********************/ | |
1083 | /* | |
1084 | * Various subroutines dealing with IrDA and network stuff we use to | |
1085 | * configure and initialise each irda-usb instance. | |
1086 | * These functions are used below in the main calls of the driver... | |
1087 | */ | |
1088 | ||
1089 | /*------------------------------------------------------------------*/ | |
1090 | /* | |
1091 | * Set proper values in the IrDA QOS structure | |
1092 | */ | |
1093 | static inline void irda_usb_init_qos(struct irda_usb_cb *self) | |
1094 | { | |
1095 | struct irda_class_desc *desc; | |
1096 | ||
1097 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); | |
1098 | ||
1099 | desc = self->irda_desc; | |
1100 | ||
1101 | /* Initialize QoS for this device */ | |
1102 | irda_init_max_qos_capabilies(&self->qos); | |
1103 | ||
1104 | /* See spec section 7.2 for meaning. | |
1105 | * Values are little endian (as most USB stuff), the IrDA stack | |
1106 | * use it in native order (see parameters.c). - Jean II */ | |
1107 | self->qos.baud_rate.bits = le16_to_cpu(desc->wBaudRate); | |
1108 | self->qos.min_turn_time.bits = desc->bmMinTurnaroundTime; | |
1109 | self->qos.additional_bofs.bits = desc->bmAdditionalBOFs; | |
1110 | self->qos.window_size.bits = desc->bmWindowSize; | |
1111 | self->qos.data_size.bits = desc->bmDataSize; | |
1112 | ||
1113 | IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n", | |
1114 | __FUNCTION__, 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); | |
1115 | ||
1116 | /* Don't always trust what the dongle tell us */ | |
1117 | if(self->capability & IUC_SIR_ONLY) | |
1118 | self->qos.baud_rate.bits &= 0x00ff; | |
1119 | if(self->capability & IUC_SMALL_PKT) | |
1120 | self->qos.data_size.bits = 0x07; | |
1121 | if(self->capability & IUC_NO_WINDOW) | |
1122 | self->qos.window_size.bits = 0x01; | |
1123 | if(self->capability & IUC_MAX_WINDOW) | |
1124 | self->qos.window_size.bits = 0x7f; | |
1125 | if(self->capability & IUC_MAX_XBOFS) | |
1126 | self->qos.additional_bofs.bits = 0x01; | |
1127 | ||
1128 | #if 1 | |
1129 | /* Module parameter can override the rx window size */ | |
1130 | if (qos_mtt_bits) | |
1131 | self->qos.min_turn_time.bits = qos_mtt_bits; | |
1132 | #endif | |
1133 | /* | |
1134 | * Note : most of those values apply only for the receive path, | |
1135 | * the transmit path will be set differently - Jean II | |
1136 | */ | |
1137 | irda_qos_bits_to_value(&self->qos); | |
1138 | } | |
1139 | ||
1140 | /*------------------------------------------------------------------*/ | |
1141 | /* | |
1142 | * Initialise the network side of the irda-usb instance | |
1143 | * Called when a new USB instance is registered in irda_usb_probe() | |
1144 | */ | |
1145 | static inline int irda_usb_open(struct irda_usb_cb *self) | |
1146 | { | |
1147 | struct net_device *netdev = self->netdev; | |
1148 | ||
1149 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1150 | ||
1151 | irda_usb_init_qos(self); | |
1152 | ||
1153 | /* Override the network functions we need to use */ | |
1154 | netdev->hard_start_xmit = irda_usb_hard_xmit; | |
1155 | netdev->tx_timeout = irda_usb_net_timeout; | |
1156 | netdev->watchdog_timeo = 250*HZ/1000; /* 250 ms > USB timeout */ | |
1157 | netdev->open = irda_usb_net_open; | |
1158 | netdev->stop = irda_usb_net_close; | |
1159 | netdev->get_stats = irda_usb_net_get_stats; | |
1160 | netdev->do_ioctl = irda_usb_net_ioctl; | |
1161 | ||
1162 | return register_netdev(netdev); | |
1163 | } | |
1164 | ||
1165 | /*------------------------------------------------------------------*/ | |
1166 | /* | |
1167 | * Cleanup the network side of the irda-usb instance | |
1168 | * Called when a USB instance is removed in irda_usb_disconnect() | |
1169 | */ | |
1170 | static inline void irda_usb_close(struct irda_usb_cb *self) | |
1171 | { | |
1172 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1173 | ||
1174 | /* Remove netdevice */ | |
1175 | unregister_netdev(self->netdev); | |
1176 | ||
1177 | /* Remove the speed buffer */ | |
1178 | if (self->speed_buff != NULL) { | |
1179 | kfree(self->speed_buff); | |
1180 | self->speed_buff = NULL; | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | /********************** USB CONFIG SUBROUTINES **********************/ | |
1185 | /* | |
1186 | * Various subroutines dealing with USB stuff we use to configure and | |
1187 | * initialise each irda-usb instance. | |
1188 | * These functions are used below in the main calls of the driver... | |
1189 | */ | |
1190 | ||
1191 | /*------------------------------------------------------------------*/ | |
1192 | /* | |
1193 | * Function irda_usb_parse_endpoints(dev, ifnum) | |
1194 | * | |
1195 | * Parse the various endpoints and find the one we need. | |
1196 | * | |
1197 | * The endpoint are the pipes used to communicate with the USB device. | |
1198 | * The spec defines 2 endpoints of type bulk transfer, one in, and one out. | |
1199 | * These are used to pass frames back and forth with the dongle. | |
1200 | * Most dongle have also an interrupt endpoint, that will be probably | |
1201 | * documented in the next spec... | |
1202 | */ | |
1203 | static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum) | |
1204 | { | |
1205 | int i; /* Endpoint index in table */ | |
1206 | ||
1207 | /* Init : no endpoints */ | |
1208 | self->bulk_in_ep = 0; | |
1209 | self->bulk_out_ep = 0; | |
1210 | self->bulk_int_ep = 0; | |
1211 | ||
1212 | /* Let's look at all those endpoints */ | |
1213 | for(i = 0; i < ennum; i++) { | |
1214 | /* All those variables will get optimised by the compiler, | |
1215 | * so let's aim for clarity... - Jean II */ | |
1216 | __u8 ep; /* Endpoint address */ | |
1217 | __u8 dir; /* Endpoint direction */ | |
1218 | __u8 attr; /* Endpoint attribute */ | |
1219 | __u16 psize; /* Endpoint max packet size in bytes */ | |
1220 | ||
1221 | /* Get endpoint address, direction and attribute */ | |
1222 | ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; | |
1223 | dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK; | |
1224 | attr = endpoint[i].desc.bmAttributes; | |
1225 | psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize); | |
1226 | ||
1227 | /* Is it a bulk endpoint ??? */ | |
1228 | if(attr == USB_ENDPOINT_XFER_BULK) { | |
1229 | /* We need to find an IN and an OUT */ | |
1230 | if(dir == USB_DIR_IN) { | |
1231 | /* This is our Rx endpoint */ | |
1232 | self->bulk_in_ep = ep; | |
1233 | } else { | |
1234 | /* This is our Tx endpoint */ | |
1235 | self->bulk_out_ep = ep; | |
1236 | self->bulk_out_mtu = psize; | |
1237 | } | |
1238 | } else { | |
1239 | if((attr == USB_ENDPOINT_XFER_INT) && | |
1240 | (dir == USB_DIR_IN)) { | |
1241 | /* This is our interrupt endpoint */ | |
1242 | self->bulk_int_ep = ep; | |
1243 | } else { | |
1244 | IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __FUNCTION__, ep); | |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n", | |
1250 | __FUNCTION__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep); | |
1251 | /* Should be 8, 16, 32 or 64 bytes */ | |
1252 | IRDA_ASSERT(self->bulk_out_mtu == 64, ;); | |
1253 | ||
1254 | return((self->bulk_in_ep != 0) && (self->bulk_out_ep != 0)); | |
1255 | } | |
1256 | ||
1257 | #ifdef IU_DUMP_CLASS_DESC | |
1258 | /*------------------------------------------------------------------*/ | |
1259 | /* | |
1260 | * Function usb_irda_dump_class_desc(desc) | |
1261 | * | |
1262 | * Prints out the contents of the IrDA class descriptor | |
1263 | * | |
1264 | */ | |
1265 | static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc) | |
1266 | { | |
1267 | /* Values are little endian */ | |
1268 | printk("bLength=%x\n", desc->bLength); | |
1269 | printk("bDescriptorType=%x\n", desc->bDescriptorType); | |
1270 | printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision)); | |
1271 | printk("bmDataSize=%x\n", desc->bmDataSize); | |
1272 | printk("bmWindowSize=%x\n", desc->bmWindowSize); | |
1273 | printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime); | |
1274 | printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate)); | |
1275 | printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs); | |
1276 | printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff); | |
1277 | printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList); | |
1278 | } | |
1279 | #endif /* IU_DUMP_CLASS_DESC */ | |
1280 | ||
1281 | /*------------------------------------------------------------------*/ | |
1282 | /* | |
1283 | * Function irda_usb_find_class_desc(intf) | |
1284 | * | |
1285 | * Returns instance of IrDA class descriptor, or NULL if not found | |
1286 | * | |
1287 | * The class descriptor is some extra info that IrDA USB devices will | |
1288 | * offer to us, describing their IrDA characteristics. We will use that in | |
1289 | * irda_usb_init_qos() | |
1290 | */ | |
1291 | static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf) | |
1292 | { | |
1293 | struct usb_device *dev = interface_to_usbdev (intf); | |
1294 | struct irda_class_desc *desc; | |
1295 | int ret; | |
1296 | ||
1297 | desc = kmalloc(sizeof (*desc), GFP_KERNEL); | |
1298 | if (desc == NULL) | |
1299 | return NULL; | |
1300 | memset(desc, 0, sizeof(*desc)); | |
1301 | ||
1302 | /* USB-IrDA class spec 1.0: | |
1303 | * 6.1.3: Standard "Get Descriptor" Device Request is not | |
1304 | * appropriate to retrieve class-specific descriptor | |
1305 | * 6.2.5: Class Specific "Get Class Descriptor" Interface Request | |
1306 | * is mandatory and returns the USB-IrDA class descriptor | |
1307 | */ | |
1308 | ||
1309 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0), | |
1310 | IU_REQ_GET_CLASS_DESC, | |
1311 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
1312 | 0, intf->altsetting->desc.bInterfaceNumber, desc, | |
1313 | sizeof(*desc), 500); | |
1314 | ||
1315 | IRDA_DEBUG(1, "%s(), ret=%d\n", __FUNCTION__, ret); | |
1316 | if (ret < sizeof(*desc)) { | |
1317 | IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n", | |
1318 | (ret<0) ? "failed" : "too short", ret); | |
1319 | } | |
1320 | else if (desc->bDescriptorType != USB_DT_IRDA) { | |
1321 | IRDA_WARNING("usb-irda: bad class_descriptor type\n"); | |
1322 | } | |
1323 | else { | |
1324 | #ifdef IU_DUMP_CLASS_DESC | |
1325 | irda_usb_dump_class_desc(desc); | |
1326 | #endif /* IU_DUMP_CLASS_DESC */ | |
1327 | ||
1328 | return desc; | |
1329 | } | |
1330 | kfree(desc); | |
1331 | return NULL; | |
1332 | } | |
1333 | ||
1334 | /*********************** USB DEVICE CALLBACKS ***********************/ | |
1335 | /* | |
1336 | * Main calls from the USB subsystem. | |
1337 | * Mostly registering a new irda-usb device and removing it.... | |
1338 | */ | |
1339 | ||
1340 | /*------------------------------------------------------------------*/ | |
1341 | /* | |
1342 | * This routine is called by the USB subsystem for each new device | |
1343 | * in the system. We need to check if the device is ours, and in | |
1344 | * this case start handling it. | |
1345 | * The USB layer protect us from reentrancy (via BKL), so we don't need | |
1346 | * to spinlock in there... Jean II | |
1347 | */ | |
1348 | static int irda_usb_probe(struct usb_interface *intf, | |
1349 | const struct usb_device_id *id) | |
1350 | { | |
1351 | struct net_device *net; | |
1352 | struct usb_device *dev = interface_to_usbdev(intf); | |
1353 | struct irda_usb_cb *self = NULL; | |
1354 | struct usb_host_interface *interface; | |
1355 | struct irda_class_desc *irda_desc; | |
1356 | int ret = -ENOMEM; | |
1357 | int i; /* Driver instance index / Rx URB index */ | |
1358 | ||
1359 | /* Note : the probe make sure to call us only for devices that | |
1360 | * matches the list of dongle (top of the file). So, we | |
1361 | * don't need to check if the dongle is really ours. | |
1362 | * Jean II */ | |
1363 | ||
1364 | IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n", | |
1365 | dev->devnum, le16_to_cpu(dev->descriptor.idVendor), | |
1366 | le16_to_cpu(dev->descriptor.idProduct)); | |
1367 | ||
1368 | net = alloc_irdadev(sizeof(*self)); | |
1369 | if (!net) | |
1370 | goto err_out; | |
1371 | ||
1372 | SET_MODULE_OWNER(net); | |
1373 | SET_NETDEV_DEV(net, &intf->dev); | |
1374 | self = net->priv; | |
1375 | self->netdev = net; | |
1376 | spin_lock_init(&self->lock); | |
1377 | ||
1378 | /* Create all of the needed urbs */ | |
1379 | for (i = 0; i < IU_MAX_RX_URBS; i++) { | |
1380 | self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); | |
1381 | if (!self->rx_urb[i]) { | |
1382 | goto err_out_1; | |
1383 | } | |
1384 | } | |
1385 | self->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1386 | if (!self->tx_urb) { | |
1387 | goto err_out_1; | |
1388 | } | |
1389 | self->speed_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1390 | if (!self->speed_urb) { | |
1391 | goto err_out_2; | |
1392 | } | |
1393 | ||
1394 | /* Is this really necessary? (no, except maybe for broken devices) */ | |
1395 | if (usb_reset_configuration (dev) < 0) { | |
1396 | err("reset_configuration failed"); | |
1397 | ret = -EIO; | |
1398 | goto err_out_3; | |
1399 | } | |
1400 | ||
1401 | /* Is this really necessary? */ | |
1402 | /* Note : some driver do hardcode the interface number, some others | |
1403 | * specify an alternate, but very few driver do like this. | |
1404 | * Jean II */ | |
1405 | ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0); | |
1406 | IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret); | |
1407 | switch (ret) { | |
1408 | case 0: | |
1409 | break; | |
1410 | case -EPIPE: /* -EPIPE = -32 */ | |
1411 | /* Martin Diehl says if we get a -EPIPE we should | |
1412 | * be fine and we don't need to do a usb_clear_halt(). | |
1413 | * - Jean II */ | |
1414 | IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __FUNCTION__); | |
1415 | break; | |
1416 | default: | |
1417 | IRDA_DEBUG(0, "%s(), Unknown error %d\n", __FUNCTION__, ret); | |
1418 | ret = -EIO; | |
1419 | goto err_out_3; | |
1420 | } | |
1421 | ||
1422 | /* Find our endpoints */ | |
1423 | interface = intf->cur_altsetting; | |
1424 | if(!irda_usb_parse_endpoints(self, interface->endpoint, | |
1425 | interface->desc.bNumEndpoints)) { | |
1426 | IRDA_ERROR("%s(), Bogus endpoints...\n", __FUNCTION__); | |
1427 | ret = -EIO; | |
1428 | goto err_out_3; | |
1429 | } | |
1430 | ||
1431 | /* Find IrDA class descriptor */ | |
1432 | irda_desc = irda_usb_find_class_desc(intf); | |
1433 | ret = -ENODEV; | |
1434 | if (irda_desc == NULL) | |
1435 | goto err_out_3; | |
1436 | ||
1437 | self->irda_desc = irda_desc; | |
1438 | self->present = 1; | |
1439 | self->netopen = 0; | |
1440 | self->capability = id->driver_info; | |
1441 | self->usbdev = dev; | |
1442 | self->usbintf = intf; | |
1443 | ||
1444 | /* Allocate the buffer for speed changes */ | |
1445 | /* Don't change this buffer size and allocation without doing | |
1446 | * some heavy and complete testing. Don't ask why :-( | |
1447 | * Jean II */ | |
1448 | self->speed_buff = (char *) kmalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL); | |
1449 | if (self->speed_buff == NULL) | |
1450 | goto err_out_3; | |
1451 | ||
1452 | memset(self->speed_buff, 0, IRDA_USB_SPEED_MTU); | |
1453 | ||
1454 | ret = irda_usb_open(self); | |
1455 | if (ret) | |
1456 | goto err_out_4; | |
1457 | ||
1458 | IRDA_MESSAGE("IrDA: Registered device %s\n", net->name); | |
1459 | usb_set_intfdata(intf, self); | |
1460 | return 0; | |
1461 | ||
1462 | err_out_4: | |
1463 | kfree(self->speed_buff); | |
1464 | err_out_3: | |
1465 | /* Free all urbs that we may have created */ | |
1466 | usb_free_urb(self->speed_urb); | |
1467 | err_out_2: | |
1468 | usb_free_urb(self->tx_urb); | |
1469 | err_out_1: | |
1470 | for (i = 0; i < IU_MAX_RX_URBS; i++) { | |
1471 | if (self->rx_urb[i]) | |
1472 | usb_free_urb(self->rx_urb[i]); | |
1473 | } | |
1474 | free_netdev(net); | |
1475 | err_out: | |
1476 | return ret; | |
1477 | } | |
1478 | ||
1479 | /*------------------------------------------------------------------*/ | |
1480 | /* | |
1481 | * The current irda-usb device is removed, the USB layer tell us | |
1482 | * to shut it down... | |
1483 | * One of the constraints is that when we exit this function, | |
1484 | * we cannot use the usb_device no more. Gone. Destroyed. kfree(). | |
1485 | * Most other subsystem allow you to destroy the instance at a time | |
1486 | * when it's convenient to you, to postpone it to a later date, but | |
1487 | * not the USB subsystem. | |
1488 | * So, we must make bloody sure that everything gets deactivated. | |
1489 | * Jean II | |
1490 | */ | |
1491 | static void irda_usb_disconnect(struct usb_interface *intf) | |
1492 | { | |
1493 | unsigned long flags; | |
1494 | struct irda_usb_cb *self = usb_get_intfdata(intf); | |
1495 | int i; | |
1496 | ||
1497 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1498 | ||
1499 | usb_set_intfdata(intf, NULL); | |
1500 | if (!self) | |
1501 | return; | |
1502 | ||
1503 | /* Make sure that the Tx path is not executing. - Jean II */ | |
1504 | spin_lock_irqsave(&self->lock, flags); | |
1505 | ||
1506 | /* Oups ! We are not there any more. | |
1507 | * This will stop/desactivate the Tx path. - Jean II */ | |
1508 | self->present = 0; | |
1509 | ||
1510 | /* We need to have irq enabled to unlink the URBs. That's OK, | |
1511 | * at this point the Tx path is gone - Jean II */ | |
1512 | spin_unlock_irqrestore(&self->lock, flags); | |
1513 | ||
1514 | /* Hum... Check if networking is still active (avoid races) */ | |
1515 | if((self->netopen) || (self->irlap)) { | |
1516 | /* Accept no more transmissions */ | |
1517 | /*netif_device_detach(self->netdev);*/ | |
1518 | netif_stop_queue(self->netdev); | |
1519 | /* Stop all the receive URBs */ | |
1520 | for (i = 0; i < IU_MAX_RX_URBS; i++) | |
1521 | usb_kill_urb(self->rx_urb[i]); | |
1522 | /* Cancel Tx and speed URB. | |
1523 | * Toggle flags to make sure it's synchronous. */ | |
1524 | self->tx_urb->transfer_flags &= ~URB_ASYNC_UNLINK; | |
1525 | usb_kill_urb(self->tx_urb); | |
1526 | self->speed_urb->transfer_flags &= ~URB_ASYNC_UNLINK; | |
1527 | usb_kill_urb(self->speed_urb); | |
1528 | } | |
1529 | ||
1530 | /* Cleanup the device stuff */ | |
1531 | irda_usb_close(self); | |
1532 | /* No longer attached to USB bus */ | |
1533 | self->usbdev = NULL; | |
1534 | self->usbintf = NULL; | |
1535 | ||
1536 | /* Clean up our urbs */ | |
1537 | for (i = 0; i < IU_MAX_RX_URBS; i++) | |
1538 | usb_free_urb(self->rx_urb[i]); | |
1539 | /* Clean up Tx and speed URB */ | |
1540 | usb_free_urb(self->tx_urb); | |
1541 | usb_free_urb(self->speed_urb); | |
1542 | ||
1543 | /* Free self and network device */ | |
1544 | free_netdev(self->netdev); | |
1545 | IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __FUNCTION__); | |
1546 | } | |
1547 | ||
1548 | /*------------------------------------------------------------------*/ | |
1549 | /* | |
1550 | * USB device callbacks | |
1551 | */ | |
1552 | static struct usb_driver irda_driver = { | |
1553 | .owner = THIS_MODULE, | |
1554 | .name = "irda-usb", | |
1555 | .probe = irda_usb_probe, | |
1556 | .disconnect = irda_usb_disconnect, | |
1557 | .id_table = dongles, | |
1558 | }; | |
1559 | ||
1560 | /************************* MODULE CALLBACKS *************************/ | |
1561 | /* | |
1562 | * Deal with module insertion/removal | |
1563 | * Mostly tell USB about our existence | |
1564 | */ | |
1565 | ||
1566 | /*------------------------------------------------------------------*/ | |
1567 | /* | |
1568 | * Module insertion | |
1569 | */ | |
1570 | static int __init usb_irda_init(void) | |
1571 | { | |
1572 | int ret; | |
1573 | ||
1574 | ret = usb_register(&irda_driver); | |
1575 | if (ret < 0) | |
1576 | return ret; | |
1577 | ||
1578 | IRDA_MESSAGE("USB IrDA support registered\n"); | |
1579 | return 0; | |
1580 | } | |
1581 | module_init(usb_irda_init); | |
1582 | ||
1583 | /*------------------------------------------------------------------*/ | |
1584 | /* | |
1585 | * Module removal | |
1586 | */ | |
1587 | static void __exit usb_irda_cleanup(void) | |
1588 | { | |
1589 | /* Deregister the driver and remove all pending instances */ | |
1590 | usb_deregister(&irda_driver); | |
1591 | } | |
1592 | module_exit(usb_irda_cleanup); | |
1593 | ||
1594 | /*------------------------------------------------------------------*/ | |
1595 | /* | |
1596 | * Module parameters | |
1597 | */ | |
1598 | module_param(qos_mtt_bits, int, 0); | |
1599 | MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time"); | |
1600 | MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net> and Jean Tourrilhes <jt@hpl.hp.com>"); | |
1601 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver"); | |
1602 | MODULE_LICENSE("GPL"); |