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1da177e4 LT |
1 | /***************************************************************************** |
2 | * | |
3 | * Filename: irda-usb.c | |
137dc023 | 4 | * Version: 0.10 |
1da177e4 LT |
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> | |
137dc023 SO |
12 | * Copyright (C) 2004, SigmaTel, Inc. <irquality@sigmatel.com> |
13 | * Copyright (C) 2005, Milan Beno <beno@pobox.sk> | |
14 | * Copyright (C) 2006, Nick Fedchik <nick@fedchik.org.ua> | |
1da177e4 LT |
15 | * |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
29 | * | |
30 | *****************************************************************************/ | |
31 | ||
32 | /* | |
33 | * IMPORTANT NOTE | |
34 | * -------------- | |
35 | * | |
36 | * As of kernel 2.5.20, this is the state of compliance and testing of | |
37 | * this driver (irda-usb) with regards to the USB low level drivers... | |
38 | * | |
39 | * This driver has been tested SUCCESSFULLY with the following drivers : | |
40 | * o usb-uhci-hcd (For Intel/Via USB controllers) | |
41 | * o uhci-hcd (Alternate/JE driver for Intel/Via USB controllers) | |
42 | * o ohci-hcd (For other USB controllers) | |
43 | * | |
44 | * This driver has NOT been tested with the following drivers : | |
45 | * o ehci-hcd (USB 2.0 controllers) | |
46 | * | |
47 | * Note that all HCD drivers do URB_ZERO_PACKET and timeout properly, | |
48 | * so we don't have to worry about that anymore. | |
49 | * One common problem is the failure to set the address on the dongle, | |
50 | * but this happens before the driver gets loaded... | |
51 | * | |
52 | * Jean II | |
53 | */ | |
54 | ||
55 | /*------------------------------------------------------------------*/ | |
56 | ||
57 | #include <linux/module.h> | |
58 | #include <linux/moduleparam.h> | |
59 | #include <linux/kernel.h> | |
60 | #include <linux/types.h> | |
61 | #include <linux/init.h> | |
62 | #include <linux/skbuff.h> | |
63 | #include <linux/netdevice.h> | |
64 | #include <linux/slab.h> | |
65 | #include <linux/rtnetlink.h> | |
66 | #include <linux/usb.h> | |
137dc023 | 67 | #include <linux/firmware.h> |
1da177e4 LT |
68 | |
69 | #include "irda-usb.h" | |
70 | ||
71 | /*------------------------------------------------------------------*/ | |
72 | ||
73 | static int qos_mtt_bits = 0; | |
74 | ||
75 | /* These are the currently known IrDA USB dongles. Add new dongles here */ | |
76 | static 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 }, | |
137dc023 | 85 | /* SigmaTel STIR4210/4220/4116 USB IrDA (VFIR) Bridge */ |
8ef80aef NF |
86 | { USB_DEVICE(0x66f, 0x4210), .driver_info = IUC_STIR421X | IUC_SPEED_BUG }, |
87 | { USB_DEVICE(0x66f, 0x4220), .driver_info = IUC_STIR421X | IUC_SPEED_BUG }, | |
88 | { USB_DEVICE(0x66f, 0x4116), .driver_info = IUC_STIR421X | IUC_SPEED_BUG }, | |
1da177e4 | 89 | { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS | |
137dc023 | 90 | USB_DEVICE_ID_MATCH_INT_SUBCLASS, |
1da177e4 LT |
91 | .bInterfaceClass = USB_CLASS_APP_SPEC, |
92 | .bInterfaceSubClass = USB_CLASS_IRDA, | |
93 | .driver_info = IUC_DEFAULT, }, | |
94 | { }, /* The end */ | |
95 | }; | |
96 | ||
97 | /* | |
98 | * Important note : | |
99 | * Devices based on the SigmaTel chipset (0x66f, 0x4200) are not designed | |
100 | * using the "USB-IrDA specification" (yes, there exist such a thing), and | |
101 | * therefore not supported by this driver (don't add them above). | |
102 | * There is a Linux driver, stir4200, that support those USB devices. | |
103 | * Jean II | |
104 | */ | |
105 | ||
106 | MODULE_DEVICE_TABLE(usb, dongles); | |
107 | ||
108 | /*------------------------------------------------------------------*/ | |
109 | ||
137dc023 | 110 | static void irda_usb_init_qos(struct irda_usb_cb *self) ; |
1da177e4 LT |
111 | static struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf); |
112 | static void irda_usb_disconnect(struct usb_interface *intf); | |
113 | static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self); | |
114 | static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *dev); | |
115 | static int irda_usb_open(struct irda_usb_cb *self); | |
116 | static void irda_usb_close(struct irda_usb_cb *self); | |
117 | static void speed_bulk_callback(struct urb *urb, struct pt_regs *regs); | |
118 | static void write_bulk_callback(struct urb *urb, struct pt_regs *regs); | |
119 | static void irda_usb_receive(struct urb *urb, struct pt_regs *regs); | |
669d32a2 | 120 | static void irda_usb_rx_defer_expired(unsigned long data); |
1da177e4 LT |
121 | static int irda_usb_net_open(struct net_device *dev); |
122 | static int irda_usb_net_close(struct net_device *dev); | |
123 | static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
124 | static void irda_usb_net_timeout(struct net_device *dev); | |
125 | static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev); | |
126 | ||
127 | /************************ TRANSMIT ROUTINES ************************/ | |
128 | /* | |
129 | * Receive packets from the IrDA stack and send them on the USB pipe. | |
130 | * Handle speed change, timeout and lot's of ugliness... | |
131 | */ | |
132 | ||
133 | /*------------------------------------------------------------------*/ | |
134 | /* | |
135 | * Function irda_usb_build_header(self, skb, header) | |
136 | * | |
137 | * Builds USB-IrDA outbound header | |
138 | * | |
139 | * When we send an IrDA frame over an USB pipe, we add to it a 1 byte | |
140 | * header. This function create this header with the proper values. | |
141 | * | |
142 | * Important note : the USB-IrDA spec 1.0 say very clearly in chapter 5.4.2.2 | |
143 | * that the setting of the link speed and xbof number in this outbound header | |
144 | * should be applied *AFTER* the frame has been sent. | |
145 | * Unfortunately, some devices are not compliant with that... It seems that | |
146 | * reading the spec is far too difficult... | |
147 | * Jean II | |
148 | */ | |
149 | static void irda_usb_build_header(struct irda_usb_cb *self, | |
150 | __u8 *header, | |
151 | int force) | |
152 | { | |
137dc023 SO |
153 | /* Here we check if we have an STIR421x chip, |
154 | * and if either speed or xbofs (or both) needs | |
155 | * to be changed. | |
156 | */ | |
8ef80aef | 157 | if (self->capability & IUC_STIR421X && |
137dc023 SO |
158 | ((self->new_speed != -1) || (self->new_xbofs != -1))) { |
159 | ||
160 | /* With STIR421x, speed and xBOFs must be set at the same | |
161 | * time, even if only one of them changes. | |
162 | */ | |
163 | if (self->new_speed == -1) | |
164 | self->new_speed = self->speed ; | |
165 | ||
166 | if (self->new_xbofs == -1) | |
167 | self->new_xbofs = self->xbofs ; | |
168 | } | |
169 | ||
170 | /* Set the link speed */ | |
1da177e4 LT |
171 | if (self->new_speed != -1) { |
172 | /* Hum... Ugly hack :-( | |
173 | * Some device are not compliant with the spec and change | |
174 | * parameters *before* sending the frame. - Jean II | |
175 | */ | |
176 | if ((self->capability & IUC_SPEED_BUG) && | |
177 | (!force) && (self->speed != -1)) { | |
178 | /* No speed and xbofs change here | |
179 | * (we'll do it later in the write callback) */ | |
180 | IRDA_DEBUG(2, "%s(), not changing speed yet\n", __FUNCTION__); | |
181 | *header = 0; | |
182 | return; | |
183 | } | |
184 | ||
185 | IRDA_DEBUG(2, "%s(), changing speed to %d\n", __FUNCTION__, self->new_speed); | |
186 | self->speed = self->new_speed; | |
187 | /* We will do ` self->new_speed = -1; ' in the completion | |
188 | * handler just in case the current URB fail - Jean II */ | |
189 | ||
190 | switch (self->speed) { | |
191 | case 2400: | |
192 | *header = SPEED_2400; | |
193 | break; | |
194 | default: | |
195 | case 9600: | |
196 | *header = SPEED_9600; | |
197 | break; | |
198 | case 19200: | |
199 | *header = SPEED_19200; | |
200 | break; | |
201 | case 38400: | |
202 | *header = SPEED_38400; | |
203 | break; | |
204 | case 57600: | |
205 | *header = SPEED_57600; | |
206 | break; | |
207 | case 115200: | |
208 | *header = SPEED_115200; | |
209 | break; | |
210 | case 576000: | |
211 | *header = SPEED_576000; | |
212 | break; | |
213 | case 1152000: | |
214 | *header = SPEED_1152000; | |
215 | break; | |
216 | case 4000000: | |
217 | *header = SPEED_4000000; | |
218 | self->new_xbofs = 0; | |
219 | break; | |
137dc023 SO |
220 | case 16000000: |
221 | *header = SPEED_16000000; | |
222 | self->new_xbofs = 0; | |
223 | break; | |
224 | } | |
1da177e4 LT |
225 | } else |
226 | /* No change */ | |
227 | *header = 0; | |
228 | ||
229 | /* Set the negotiated additional XBOFS */ | |
230 | if (self->new_xbofs != -1) { | |
231 | IRDA_DEBUG(2, "%s(), changing xbofs to %d\n", __FUNCTION__, self->new_xbofs); | |
232 | self->xbofs = self->new_xbofs; | |
233 | /* We will do ` self->new_xbofs = -1; ' in the completion | |
234 | * handler just in case the current URB fail - Jean II */ | |
235 | ||
236 | switch (self->xbofs) { | |
237 | case 48: | |
238 | *header |= 0x10; | |
239 | break; | |
240 | case 28: | |
241 | case 24: /* USB spec 1.0 says 24 */ | |
242 | *header |= 0x20; | |
243 | break; | |
244 | default: | |
245 | case 12: | |
246 | *header |= 0x30; | |
247 | break; | |
248 | case 5: /* Bug in IrLAP spec? (should be 6) */ | |
249 | case 6: | |
250 | *header |= 0x40; | |
251 | break; | |
252 | case 3: | |
253 | *header |= 0x50; | |
254 | break; | |
255 | case 2: | |
256 | *header |= 0x60; | |
257 | break; | |
258 | case 1: | |
259 | *header |= 0x70; | |
260 | break; | |
261 | case 0: | |
262 | *header |= 0x80; | |
263 | break; | |
264 | } | |
265 | } | |
266 | } | |
267 | ||
137dc023 SO |
268 | /* |
269 | * calculate turnaround time for SigmaTel header | |
270 | */ | |
271 | static __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 | ||
1da177e4 LT |
294 | /*------------------------------------------------------------------*/ |
295 | /* | |
296 | * Send a command to change the speed of the dongle | |
297 | * Need to be called with spinlock on. | |
298 | */ | |
299 | static void irda_usb_change_speed_xbofs(struct irda_usb_cb *self) | |
300 | { | |
301 | __u8 *frame; | |
302 | struct urb *urb; | |
303 | int ret; | |
304 | ||
305 | IRDA_DEBUG(2, "%s(), speed=%d, xbofs=%d\n", __FUNCTION__, | |
306 | self->new_speed, self->new_xbofs); | |
307 | ||
308 | /* Grab the speed URB */ | |
309 | urb = self->speed_urb; | |
310 | if (urb->status != 0) { | |
311 | IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__); | |
312 | return; | |
313 | } | |
314 | ||
315 | /* Allocate the fake frame */ | |
316 | frame = self->speed_buff; | |
317 | ||
318 | /* Set the new speed and xbofs in this fake frame */ | |
319 | irda_usb_build_header(self, frame, 1); | |
320 | ||
8ef80aef | 321 | if (self->capability & IUC_STIR421X) { |
137dc023 SO |
322 | if (frame[0] == 0) return ; // do nothing if no change |
323 | frame[1] = 0; // other parameters don't change here | |
324 | frame[2] = 0; | |
325 | } | |
326 | ||
1da177e4 LT |
327 | /* Submit the 0 length IrDA frame to trigger new speed settings */ |
328 | usb_fill_bulk_urb(urb, self->usbdev, | |
329 | usb_sndbulkpipe(self->usbdev, self->bulk_out_ep), | |
330 | frame, IRDA_USB_SPEED_MTU, | |
331 | speed_bulk_callback, self); | |
137dc023 | 332 | urb->transfer_buffer_length = self->header_length; |
b375a049 | 333 | urb->transfer_flags = 0; |
1da177e4 LT |
334 | |
335 | /* Irq disabled -> GFP_ATOMIC */ | |
336 | if ((ret = usb_submit_urb(urb, GFP_ATOMIC))) { | |
337 | IRDA_WARNING("%s(), failed Speed URB\n", __FUNCTION__); | |
338 | } | |
339 | } | |
340 | ||
341 | /*------------------------------------------------------------------*/ | |
342 | /* | |
343 | * Speed URB callback | |
344 | * Now, we can only get called for the speed URB. | |
345 | */ | |
346 | static void speed_bulk_callback(struct urb *urb, struct pt_regs *regs) | |
347 | { | |
348 | struct irda_usb_cb *self = urb->context; | |
349 | ||
350 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
351 | ||
352 | /* We should always have a context */ | |
353 | IRDA_ASSERT(self != NULL, return;); | |
354 | /* We should always be called for the speed URB */ | |
355 | IRDA_ASSERT(urb == self->speed_urb, return;); | |
356 | ||
357 | /* Check for timeout and other USB nasties */ | |
358 | if (urb->status != 0) { | |
359 | /* I get a lot of -ECONNABORTED = -103 here - Jean II */ | |
360 | IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __FUNCTION__, urb->status, urb->transfer_flags); | |
361 | ||
362 | /* Don't do anything here, that might confuse the USB layer. | |
363 | * Instead, we will wait for irda_usb_net_timeout(), the | |
364 | * network layer watchdog, to fix the situation. | |
365 | * Jean II */ | |
366 | /* A reset of the dongle might be welcomed here - Jean II */ | |
367 | return; | |
368 | } | |
369 | ||
370 | /* urb is now available */ | |
371 | //urb->status = 0; -> tested above | |
372 | ||
373 | /* New speed and xbof is now 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 | */ | |
385 | static int irda_usb_hard_xmit(struct sk_buff *skb, struct net_device *netdev) | |
386 | { | |
387 | struct irda_usb_cb *self = netdev->priv; | |
388 | struct urb *urb = self->tx_urb; | |
389 | unsigned long flags; | |
390 | s32 speed; | |
391 | s16 xbofs; | |
392 | int res, mtt; | |
393 | int err = 1; /* Failed */ | |
394 | ||
395 | IRDA_DEBUG(4, "%s() on %s\n", __FUNCTION__, netdev->name); | |
396 | ||
397 | netif_stop_queue(netdev); | |
398 | ||
399 | /* Protect us from USB callbacks, net watchdog and else. */ | |
400 | spin_lock_irqsave(&self->lock, flags); | |
401 | ||
402 | /* Check if the device is still there. | |
403 | * We need to check self->present under the spinlock because | |
404 | * of irda_usb_disconnect() is synchronous - Jean II */ | |
405 | if (!self->present) { | |
406 | IRDA_DEBUG(0, "%s(), Device is gone...\n", __FUNCTION__); | |
407 | goto drop; | |
408 | } | |
409 | ||
410 | /* Check if we need to change the number of xbofs */ | |
411 | xbofs = irda_get_next_xbofs(skb); | |
412 | if ((xbofs != self->xbofs) && (xbofs != -1)) { | |
413 | self->new_xbofs = xbofs; | |
414 | } | |
415 | ||
416 | /* Check if we need to change the speed */ | |
417 | speed = irda_get_next_speed(skb); | |
418 | if ((speed != self->speed) && (speed != -1)) { | |
419 | /* Set the desired speed */ | |
420 | self->new_speed = speed; | |
421 | ||
422 | /* Check for empty frame */ | |
423 | if (!skb->len) { | |
424 | /* IrLAP send us an empty frame to make us change the | |
425 | * speed. Changing speed with the USB adapter is in | |
426 | * fact sending an empty frame to the adapter, so we | |
427 | * could just let the present function do its job. | |
428 | * However, we would wait for min turn time, | |
429 | * do an extra memcpy and increment packet counters... | |
430 | * Jean II */ | |
431 | irda_usb_change_speed_xbofs(self); | |
432 | netdev->trans_start = jiffies; | |
433 | /* Will netif_wake_queue() in callback */ | |
434 | err = 0; /* No error */ | |
435 | goto drop; | |
436 | } | |
437 | } | |
438 | ||
439 | if (urb->status != 0) { | |
440 | IRDA_WARNING("%s(), URB still in use!\n", __FUNCTION__); | |
441 | goto drop; | |
442 | } | |
443 | ||
444 | /* Make sure there is room for IrDA-USB header. The actual | |
445 | * allocation will be done lower in skb_push(). | |
446 | * Also, we don't use directly skb_cow(), because it require | |
447 | * headroom >= 16, which force unnecessary copies - Jean II */ | |
137dc023 | 448 | if (skb_headroom(skb) < self->header_length) { |
1da177e4 | 449 | IRDA_DEBUG(0, "%s(), Insuficient skb headroom.\n", __FUNCTION__); |
137dc023 | 450 | if (skb_cow(skb, self->header_length)) { |
1da177e4 LT |
451 | IRDA_WARNING("%s(), failed skb_cow() !!!\n", __FUNCTION__); |
452 | goto drop; | |
453 | } | |
454 | } | |
455 | ||
456 | /* Change setting for next frame */ | |
137dc023 | 457 | |
8ef80aef | 458 | if (self->capability & IUC_STIR421X) { |
137dc023 SO |
459 | __u8 turnaround_time; |
460 | __u8* frame; | |
461 | turnaround_time = get_turnaround_time( skb ); | |
462 | frame= skb_push(skb, self->header_length); | |
463 | irda_usb_build_header(self, frame, 0); | |
464 | frame[2] = turnaround_time; | |
465 | if ((skb->len != 0) && | |
466 | ((skb->len % 128) == 0) && | |
467 | ((skb->len % 512) != 0)) { | |
468 | /* add extra byte for special SigmaTel feature */ | |
469 | frame[1] = 1; | |
470 | skb_put(skb, 1); | |
471 | } else { | |
472 | frame[1] = 0; | |
473 | } | |
474 | } else { | |
475 | irda_usb_build_header(self, skb_push(skb, self->header_length), 0); | |
476 | } | |
1da177e4 LT |
477 | |
478 | /* FIXME: Make macro out of this one */ | |
479 | ((struct irda_skb_cb *)skb->cb)->context = self; | |
480 | ||
481 | usb_fill_bulk_urb(urb, self->usbdev, | |
482 | usb_sndbulkpipe(self->usbdev, self->bulk_out_ep), | |
483 | skb->data, IRDA_SKB_MAX_MTU, | |
484 | write_bulk_callback, skb); | |
485 | urb->transfer_buffer_length = skb->len; | |
1da177e4 LT |
486 | /* This flag (URB_ZERO_PACKET) indicates that what we send is not |
487 | * a continuous stream of data but separate packets. | |
488 | * In this case, the USB layer will insert an empty USB frame (TD) | |
489 | * after each of our packets that is exact multiple of the frame size. | |
490 | * This is how the dongle will detect the end of packet - Jean II */ | |
b375a049 | 491 | urb->transfer_flags = URB_ZERO_PACKET; |
1da177e4 LT |
492 | |
493 | /* Generate min turn time. FIXME: can we do better than this? */ | |
494 | /* Trying to a turnaround time at this level is trying to measure | |
495 | * processor clock cycle with a wrist-watch, approximate at best... | |
496 | * | |
497 | * What we know is the last time we received a frame over USB. | |
498 | * Due to latency over USB that depend on the USB load, we don't | |
499 | * know when this frame was received over IrDA (a few ms before ?) | |
500 | * Then, same story for our outgoing frame... | |
501 | * | |
502 | * In theory, the USB dongle is supposed to handle the turnaround | |
503 | * by itself (spec 1.0, chater 4, page 6). Who knows ??? That's | |
504 | * why this code is enabled only for dongles that doesn't meet | |
505 | * the spec. | |
506 | * Jean II */ | |
507 | if (self->capability & IUC_NO_TURN) { | |
508 | mtt = irda_get_mtt(skb); | |
509 | if (mtt) { | |
510 | int diff; | |
511 | do_gettimeofday(&self->now); | |
512 | diff = self->now.tv_usec - self->stamp.tv_usec; | |
513 | #ifdef IU_USB_MIN_RTT | |
514 | /* Factor in USB delays -> Get rid of udelay() that | |
515 | * would be lost in the noise - Jean II */ | |
516 | diff += IU_USB_MIN_RTT; | |
517 | #endif /* IU_USB_MIN_RTT */ | |
518 | /* If the usec counter did wraparound, the diff will | |
519 | * go negative (tv_usec is a long), so we need to | |
520 | * correct it by one second. Jean II */ | |
521 | if (diff < 0) | |
522 | diff += 1000000; | |
523 | ||
524 | /* Check if the mtt is larger than the time we have | |
525 | * already used by all the protocol processing | |
526 | */ | |
527 | if (mtt > diff) { | |
528 | mtt -= diff; | |
529 | if (mtt > 1000) | |
530 | mdelay(mtt/1000); | |
531 | else | |
532 | udelay(mtt); | |
533 | } | |
534 | } | |
535 | } | |
536 | ||
537 | /* Ask USB to send the packet - Irq disabled -> GFP_ATOMIC */ | |
538 | if ((res = usb_submit_urb(urb, GFP_ATOMIC))) { | |
539 | IRDA_WARNING("%s(), failed Tx URB\n", __FUNCTION__); | |
540 | self->stats.tx_errors++; | |
541 | /* Let USB recover : We will catch that in the watchdog */ | |
542 | /*netif_start_queue(netdev);*/ | |
543 | } else { | |
544 | /* Increment packet stats */ | |
545 | self->stats.tx_packets++; | |
546 | self->stats.tx_bytes += skb->len; | |
547 | ||
548 | netdev->trans_start = jiffies; | |
549 | } | |
550 | spin_unlock_irqrestore(&self->lock, flags); | |
551 | ||
552 | return 0; | |
553 | ||
554 | drop: | |
555 | /* Drop silently the skb and exit */ | |
556 | dev_kfree_skb(skb); | |
557 | spin_unlock_irqrestore(&self->lock, flags); | |
558 | return err; /* Usually 1 */ | |
559 | } | |
560 | ||
561 | /*------------------------------------------------------------------*/ | |
562 | /* | |
563 | * Note : this function will be called only for tx_urb... | |
564 | */ | |
565 | static void write_bulk_callback(struct urb *urb, struct pt_regs *regs) | |
566 | { | |
567 | unsigned long flags; | |
568 | struct sk_buff *skb = urb->context; | |
569 | struct irda_usb_cb *self = ((struct irda_skb_cb *) skb->cb)->context; | |
570 | ||
571 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
572 | ||
573 | /* We should always have a context */ | |
574 | IRDA_ASSERT(self != NULL, return;); | |
575 | /* We should always be called for the speed URB */ | |
576 | IRDA_ASSERT(urb == self->tx_urb, return;); | |
577 | ||
578 | /* Free up the skb */ | |
579 | dev_kfree_skb_any(skb); | |
580 | urb->context = NULL; | |
581 | ||
582 | /* Check for timeout and other USB nasties */ | |
583 | if (urb->status != 0) { | |
584 | /* I get a lot of -ECONNABORTED = -103 here - Jean II */ | |
585 | IRDA_DEBUG(0, "%s(), URB complete status %d, transfer_flags 0x%04X\n", __FUNCTION__, urb->status, urb->transfer_flags); | |
586 | ||
587 | /* Don't do anything here, that might confuse the USB layer, | |
588 | * and we could go in recursion and blow the kernel stack... | |
589 | * Instead, we will wait for irda_usb_net_timeout(), the | |
590 | * network layer watchdog, to fix the situation. | |
591 | * Jean II */ | |
592 | /* A reset of the dongle might be welcomed here - Jean II */ | |
593 | return; | |
594 | } | |
595 | ||
596 | /* urb is now available */ | |
597 | //urb->status = 0; -> tested above | |
598 | ||
599 | /* Make sure we read self->present properly */ | |
600 | spin_lock_irqsave(&self->lock, flags); | |
601 | ||
602 | /* If the network is closed, stop everything */ | |
603 | if ((!self->netopen) || (!self->present)) { | |
604 | IRDA_DEBUG(0, "%s(), Network is gone...\n", __FUNCTION__); | |
605 | spin_unlock_irqrestore(&self->lock, flags); | |
606 | return; | |
607 | } | |
608 | ||
609 | /* If changes to speed or xbofs is pending... */ | |
610 | if ((self->new_speed != -1) || (self->new_xbofs != -1)) { | |
611 | if ((self->new_speed != self->speed) || | |
612 | (self->new_xbofs != self->xbofs)) { | |
613 | /* We haven't changed speed yet (because of | |
614 | * IUC_SPEED_BUG), so do it now - Jean II */ | |
615 | IRDA_DEBUG(1, "%s(), Changing speed now...\n", __FUNCTION__); | |
616 | irda_usb_change_speed_xbofs(self); | |
617 | } else { | |
618 | /* New speed and xbof is now commited in hardware */ | |
619 | self->new_speed = -1; | |
620 | self->new_xbofs = -1; | |
621 | /* Done, waiting for next packet */ | |
622 | netif_wake_queue(self->netdev); | |
623 | } | |
624 | } else { | |
625 | /* Otherwise, allow the stack to send more packets */ | |
626 | netif_wake_queue(self->netdev); | |
627 | } | |
628 | spin_unlock_irqrestore(&self->lock, flags); | |
629 | } | |
630 | ||
631 | /*------------------------------------------------------------------*/ | |
632 | /* | |
633 | * Watchdog timer from the network layer. | |
634 | * After a predetermined timeout, if we don't give confirmation that | |
635 | * the packet has been sent (i.e. no call to netif_wake_queue()), | |
636 | * the network layer will call this function. | |
637 | * Note that URB that we submit have also a timeout. When the URB timeout | |
638 | * expire, the normal URB callback is called (write_bulk_callback()). | |
639 | */ | |
640 | static void irda_usb_net_timeout(struct net_device *netdev) | |
641 | { | |
642 | unsigned long flags; | |
643 | struct irda_usb_cb *self = netdev->priv; | |
644 | struct urb *urb; | |
645 | int done = 0; /* If we have made any progress */ | |
646 | ||
647 | IRDA_DEBUG(0, "%s(), Network layer thinks we timed out!\n", __FUNCTION__); | |
648 | IRDA_ASSERT(self != NULL, return;); | |
649 | ||
650 | /* Protect us from USB callbacks, net Tx and else. */ | |
651 | spin_lock_irqsave(&self->lock, flags); | |
652 | ||
653 | /* self->present *MUST* be read under spinlock */ | |
654 | if (!self->present) { | |
655 | IRDA_WARNING("%s(), device not present!\n", __FUNCTION__); | |
656 | netif_stop_queue(netdev); | |
657 | spin_unlock_irqrestore(&self->lock, flags); | |
658 | return; | |
659 | } | |
660 | ||
661 | /* Check speed URB */ | |
662 | urb = self->speed_urb; | |
663 | if (urb->status != 0) { | |
664 | IRDA_DEBUG(0, "%s: Speed change timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags); | |
665 | ||
666 | switch (urb->status) { | |
667 | case -EINPROGRESS: | |
668 | usb_unlink_urb(urb); | |
669 | /* Note : above will *NOT* call netif_wake_queue() | |
670 | * in completion handler, we will come back here. | |
671 | * Jean II */ | |
672 | done = 1; | |
673 | break; | |
674 | case -ECONNABORTED: /* -103 */ | |
675 | case -ECONNRESET: /* -104 */ | |
676 | case -ETIMEDOUT: /* -110 */ | |
677 | case -ENOENT: /* -2 (urb unlinked by us) */ | |
678 | default: /* ??? - Play safe */ | |
679 | urb->status = 0; | |
680 | netif_wake_queue(self->netdev); | |
681 | done = 1; | |
682 | break; | |
683 | } | |
684 | } | |
685 | ||
686 | /* Check Tx URB */ | |
687 | urb = self->tx_urb; | |
688 | if (urb->status != 0) { | |
689 | struct sk_buff *skb = urb->context; | |
690 | ||
691 | IRDA_DEBUG(0, "%s: Tx timed out, urb->status=%d, urb->transfer_flags=0x%04X\n", netdev->name, urb->status, urb->transfer_flags); | |
692 | ||
693 | /* Increase error count */ | |
694 | self->stats.tx_errors++; | |
695 | ||
696 | #ifdef IU_BUG_KICK_TIMEOUT | |
697 | /* Can't be a bad idea to reset the speed ;-) - Jean II */ | |
698 | if(self->new_speed == -1) | |
699 | self->new_speed = self->speed; | |
700 | if(self->new_xbofs == -1) | |
701 | self->new_xbofs = self->xbofs; | |
702 | irda_usb_change_speed_xbofs(self); | |
703 | #endif /* IU_BUG_KICK_TIMEOUT */ | |
704 | ||
705 | switch (urb->status) { | |
706 | case -EINPROGRESS: | |
707 | usb_unlink_urb(urb); | |
708 | /* Note : above will *NOT* call netif_wake_queue() | |
709 | * in completion handler, because urb->status will | |
710 | * be -ENOENT. We will fix that at the next watchdog, | |
711 | * leaving more time to USB to recover... | |
1da177e4 LT |
712 | * Jean II */ |
713 | done = 1; | |
714 | break; | |
715 | case -ECONNABORTED: /* -103 */ | |
716 | case -ECONNRESET: /* -104 */ | |
717 | case -ETIMEDOUT: /* -110 */ | |
718 | case -ENOENT: /* -2 (urb unlinked by us) */ | |
719 | default: /* ??? - Play safe */ | |
720 | if(skb != NULL) { | |
721 | dev_kfree_skb_any(skb); | |
722 | urb->context = NULL; | |
723 | } | |
724 | urb->status = 0; | |
725 | netif_wake_queue(self->netdev); | |
726 | done = 1; | |
727 | break; | |
728 | } | |
729 | } | |
730 | spin_unlock_irqrestore(&self->lock, flags); | |
731 | ||
732 | /* Maybe we need a reset */ | |
733 | /* Note : Some drivers seem to use a usb_set_interface() when they | |
734 | * need to reset the hardware. Hum... | |
735 | */ | |
736 | ||
737 | /* if(done == 0) */ | |
738 | } | |
739 | ||
740 | /************************* RECEIVE ROUTINES *************************/ | |
741 | /* | |
742 | * Receive packets from the USB layer stack and pass them to the IrDA stack. | |
743 | * Try to work around USB failures... | |
744 | */ | |
745 | ||
746 | /* | |
747 | * Note : | |
748 | * Some of you may have noticed that most dongle have an interrupt in pipe | |
749 | * that we don't use. Here is the little secret... | |
750 | * When we hang a Rx URB on the bulk in pipe, it generates some USB traffic | |
751 | * in every USB frame. This is unnecessary overhead. | |
752 | * The interrupt in pipe will generate an event every time a packet is | |
753 | * received. Reading an interrupt pipe adds minimal overhead, but has some | |
754 | * latency (~1ms). | |
755 | * If we are connected (speed != 9600), we want to minimise latency, so | |
756 | * we just always hang the Rx URB and ignore the interrupt. | |
757 | * If we are not connected (speed == 9600), there is usually no Rx traffic, | |
758 | * and we want to minimise the USB overhead. In this case we should wait | |
759 | * on the interrupt pipe and hang the Rx URB only when an interrupt is | |
760 | * received. | |
761 | * Jean II | |
669d32a2 JT |
762 | * |
763 | * Note : don't read the above as what we are currently doing, but as | |
764 | * something we could do with KC dongle. Also don't forget that the | |
765 | * interrupt pipe is not part of the original standard, so this would | |
766 | * need to be optional... | |
767 | * Jean II | |
1da177e4 LT |
768 | */ |
769 | ||
770 | /*------------------------------------------------------------------*/ | |
771 | /* | |
772 | * Submit a Rx URB to the USB layer to handle reception of a frame | |
773 | * Mostly called by the completion callback of the previous URB. | |
774 | * | |
775 | * Jean II | |
776 | */ | |
777 | static void irda_usb_submit(struct irda_usb_cb *self, struct sk_buff *skb, struct urb *urb) | |
778 | { | |
779 | struct irda_skb_cb *cb; | |
780 | int ret; | |
781 | ||
782 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
783 | ||
784 | /* This should never happen */ | |
785 | IRDA_ASSERT(skb != NULL, return;); | |
786 | IRDA_ASSERT(urb != NULL, return;); | |
787 | ||
788 | /* Save ourselves in the skb */ | |
789 | cb = (struct irda_skb_cb *) skb->cb; | |
790 | cb->context = self; | |
791 | ||
792 | /* Reinitialize URB */ | |
793 | usb_fill_bulk_urb(urb, self->usbdev, | |
794 | usb_rcvbulkpipe(self->usbdev, self->bulk_in_ep), | |
669d32a2 | 795 | skb->data, IRDA_SKB_MAX_MTU, |
1da177e4 | 796 | irda_usb_receive, skb); |
1da177e4 LT |
797 | urb->status = 0; |
798 | ||
799 | /* Can be called from irda_usb_receive (irq handler) -> GFP_ATOMIC */ | |
800 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
801 | if (ret) { | |
802 | /* If this ever happen, we are in deep s***. | |
803 | * Basically, the Rx path will stop... */ | |
804 | IRDA_WARNING("%s(), Failed to submit Rx URB %d\n", | |
805 | __FUNCTION__, ret); | |
806 | } | |
807 | } | |
808 | ||
809 | /*------------------------------------------------------------------*/ | |
810 | /* | |
811 | * Function irda_usb_receive(urb) | |
812 | * | |
813 | * Called by the USB subsystem when a frame has been received | |
814 | * | |
815 | */ | |
816 | static void irda_usb_receive(struct urb *urb, struct pt_regs *regs) | |
817 | { | |
818 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
819 | struct irda_usb_cb *self; | |
820 | struct irda_skb_cb *cb; | |
821 | struct sk_buff *newskb; | |
822 | struct sk_buff *dataskb; | |
669d32a2 | 823 | struct urb *next_urb; |
da81817f | 824 | unsigned int len, docopy; |
1da177e4 LT |
825 | |
826 | IRDA_DEBUG(2, "%s(), len=%d\n", __FUNCTION__, urb->actual_length); | |
827 | ||
828 | /* Find ourselves */ | |
829 | cb = (struct irda_skb_cb *) skb->cb; | |
830 | IRDA_ASSERT(cb != NULL, return;); | |
831 | self = (struct irda_usb_cb *) cb->context; | |
832 | IRDA_ASSERT(self != NULL, return;); | |
833 | ||
834 | /* If the network is closed or the device gone, stop everything */ | |
835 | if ((!self->netopen) || (!self->present)) { | |
836 | IRDA_DEBUG(0, "%s(), Network is gone!\n", __FUNCTION__); | |
837 | /* Don't re-submit the URB : will stall the Rx path */ | |
838 | return; | |
839 | } | |
840 | ||
841 | /* Check the status */ | |
842 | if (urb->status != 0) { | |
843 | switch (urb->status) { | |
844 | case -EILSEQ: | |
1da177e4 | 845 | self->stats.rx_crc_errors++; |
669d32a2 JT |
846 | /* Also precursor to a hot-unplug on UHCI. */ |
847 | /* Fallthrough... */ | |
1da177e4 | 848 | case -ECONNRESET: /* -104 */ |
669d32a2 | 849 | /* Random error, if I remember correctly */ |
1da177e4 LT |
850 | /* uhci_cleanup_unlink() is going to kill the Rx |
851 | * URB just after we return. No problem, at this | |
852 | * point the URB will be idle ;-) - Jean II */ | |
669d32a2 JT |
853 | case -ESHUTDOWN: /* -108 */ |
854 | /* That's usually a hot-unplug. Submit will fail... */ | |
855 | case -ETIMEDOUT: /* -110 */ | |
856 | /* Usually precursor to a hot-unplug on OHCI. */ | |
1da177e4 | 857 | default: |
669d32a2 JT |
858 | self->stats.rx_errors++; |
859 | IRDA_DEBUG(0, "%s(), RX status %d, transfer_flags 0x%04X \n", __FUNCTION__, urb->status, urb->transfer_flags); | |
1da177e4 LT |
860 | break; |
861 | } | |
669d32a2 JT |
862 | /* If we received an error, we don't want to resubmit the |
863 | * Rx URB straight away but to give the USB layer a little | |
864 | * bit of breathing room. | |
865 | * We are in the USB thread context, therefore there is a | |
866 | * danger of recursion (new URB we submit fails, we come | |
867 | * back here). | |
868 | * With recent USB stack (2.6.15+), I'm seeing that on | |
869 | * hot unplug of the dongle... | |
870 | * Lowest effective timer is 10ms... | |
871 | * Jean II */ | |
872 | self->rx_defer_timer.function = &irda_usb_rx_defer_expired; | |
873 | self->rx_defer_timer.data = (unsigned long) urb; | |
874 | mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000)); | |
875 | return; | |
1da177e4 LT |
876 | } |
877 | ||
878 | /* Check for empty frames */ | |
137dc023 | 879 | if (urb->actual_length <= self->header_length) { |
1da177e4 LT |
880 | IRDA_WARNING("%s(), empty frame!\n", __FUNCTION__); |
881 | goto done; | |
882 | } | |
883 | ||
884 | /* | |
885 | * Remember the time we received this frame, so we can | |
886 | * reduce the min turn time a bit since we will know | |
887 | * how much time we have used for protocol processing | |
888 | */ | |
889 | do_gettimeofday(&self->stamp); | |
890 | ||
891 | /* Check if we need to copy the data to a new skb or not. | |
892 | * For most frames, we use ZeroCopy and pass the already | |
893 | * allocated skb up the stack. | |
894 | * If the frame is small, it is more efficient to copy it | |
895 | * to save memory (copy will be fast anyway - that's | |
896 | * called Rx-copy-break). Jean II */ | |
897 | docopy = (urb->actual_length < IRDA_RX_COPY_THRESHOLD); | |
898 | ||
899 | /* Allocate a new skb */ | |
8ef80aef NF |
900 | if (self->capability & IUC_STIR421X) |
901 | newskb = dev_alloc_skb(docopy ? urb->actual_length : | |
902 | IRDA_SKB_MAX_MTU + | |
903 | USB_IRDA_STIR421X_HEADER); | |
137dc023 | 904 | else |
8ef80aef NF |
905 | newskb = dev_alloc_skb(docopy ? urb->actual_length : |
906 | IRDA_SKB_MAX_MTU); | |
137dc023 | 907 | |
1da177e4 LT |
908 | if (!newskb) { |
909 | self->stats.rx_dropped++; | |
910 | /* We could deliver the current skb, but this would stall | |
911 | * the Rx path. Better drop the packet... Jean II */ | |
912 | goto done; | |
913 | } | |
914 | ||
915 | /* Make sure IP header get aligned (IrDA header is 5 bytes) */ | |
916 | /* But IrDA-USB header is 1 byte. Jean II */ | |
917 | //skb_reserve(newskb, USB_IRDA_HEADER - 1); | |
918 | ||
919 | if(docopy) { | |
920 | /* Copy packet, so we can recycle the original */ | |
921 | memcpy(newskb->data, skb->data, urb->actual_length); | |
922 | /* Deliver this new skb */ | |
923 | dataskb = newskb; | |
924 | /* And hook the old skb to the URB | |
925 | * Note : we don't need to "clean up" the old skb, | |
926 | * as we never touched it. Jean II */ | |
927 | } else { | |
928 | /* We are using ZeroCopy. Deliver old skb */ | |
929 | dataskb = skb; | |
930 | /* And hook the new skb to the URB */ | |
931 | skb = newskb; | |
932 | } | |
933 | ||
934 | /* Set proper length on skb & remove USB-IrDA header */ | |
935 | skb_put(dataskb, urb->actual_length); | |
137dc023 | 936 | skb_pull(dataskb, self->header_length); |
1da177e4 LT |
937 | |
938 | /* Ask the networking layer to queue the packet for the IrDA stack */ | |
939 | dataskb->dev = self->netdev; | |
940 | dataskb->mac.raw = dataskb->data; | |
941 | dataskb->protocol = htons(ETH_P_IRDA); | |
da81817f | 942 | len = dataskb->len; |
1da177e4 LT |
943 | netif_rx(dataskb); |
944 | ||
945 | /* Keep stats up to date */ | |
da81817f | 946 | self->stats.rx_bytes += len; |
1da177e4 LT |
947 | self->stats.rx_packets++; |
948 | self->netdev->last_rx = jiffies; | |
949 | ||
950 | done: | |
951 | /* Note : at this point, the URB we've just received (urb) | |
952 | * is still referenced by the USB layer. For example, if we | |
953 | * have received a -ECONNRESET, uhci_cleanup_unlink() will | |
954 | * continue to process it (in fact, cleaning it up). | |
955 | * If we were to submit this URB, disaster would ensue. | |
956 | * Therefore, we submit our idle URB, and put this URB in our | |
957 | * idle slot.... | |
958 | * Jean II */ | |
959 | /* Note : with this scheme, we could submit the idle URB before | |
669d32a2 JT |
960 | * processing the Rx URB. I don't think it would buy us anything as |
961 | * we are running in the USB thread context. Jean II */ | |
962 | next_urb = self->idle_rx_urb; | |
1da177e4 | 963 | |
1da177e4 LT |
964 | /* Recycle Rx URB : Now, the idle URB is the present one */ |
965 | urb->context = NULL; | |
966 | self->idle_rx_urb = urb; | |
669d32a2 JT |
967 | |
968 | /* Submit the idle URB to replace the URB we've just received. | |
969 | * Do it last to avoid race conditions... Jean II */ | |
970 | irda_usb_submit(self, skb, next_urb); | |
971 | } | |
972 | ||
973 | /*------------------------------------------------------------------*/ | |
974 | /* | |
975 | * In case of errors, we want the USB layer to have time to recover. | |
976 | * Now, it is time to resubmit ouur Rx URB... | |
977 | */ | |
978 | static void irda_usb_rx_defer_expired(unsigned long data) | |
979 | { | |
980 | struct urb *urb = (struct urb *) data; | |
981 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
982 | struct irda_usb_cb *self; | |
983 | struct irda_skb_cb *cb; | |
984 | struct urb *next_urb; | |
985 | ||
986 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
987 | ||
988 | /* Find ourselves */ | |
989 | cb = (struct irda_skb_cb *) skb->cb; | |
990 | IRDA_ASSERT(cb != NULL, return;); | |
991 | self = (struct irda_usb_cb *) cb->context; | |
992 | IRDA_ASSERT(self != NULL, return;); | |
993 | ||
994 | /* Same stuff as when Rx is done, see above... */ | |
995 | next_urb = self->idle_rx_urb; | |
996 | urb->context = NULL; | |
997 | self->idle_rx_urb = urb; | |
998 | irda_usb_submit(self, skb, next_urb); | |
1da177e4 LT |
999 | } |
1000 | ||
1001 | /*------------------------------------------------------------------*/ | |
1002 | /* | |
1003 | * Callbak from IrDA layer. IrDA wants to know if we have | |
1004 | * started receiving anything. | |
1005 | */ | |
1006 | static int irda_usb_is_receiving(struct irda_usb_cb *self) | |
1007 | { | |
1008 | /* Note : because of the way UHCI works, it's almost impossible | |
1009 | * to get this info. The Controller DMA directly to memory and | |
1010 | * signal only when the whole frame is finished. To know if the | |
1011 | * first TD of the URB has been filled or not seems hard work... | |
1012 | * | |
1013 | * The other solution would be to use the "receiving" command | |
1014 | * on the default decriptor with a usb_control_msg(), but that | |
1015 | * would add USB traffic and would return result only in the | |
1016 | * next USB frame (~1ms). | |
1017 | * | |
1018 | * I've been told that current dongles send status info on their | |
1019 | * interrupt endpoint, and that's what the Windows driver uses | |
1020 | * to know this info. Unfortunately, this is not yet in the spec... | |
1021 | * | |
1022 | * Jean II | |
1023 | */ | |
1024 | ||
1025 | return 0; /* For now */ | |
1026 | } | |
1027 | ||
8ef80aef NF |
1028 | #define STIR421X_PATCH_PRODUCT_VER "Product Version: " |
1029 | #define STIR421X_PATCH_STMP_TAG "STMP" | |
1030 | #define STIR421X_PATCH_CODE_OFFSET 512 /* patch image starts before here */ | |
1031 | /* marks end of patch file header (PC DOS text file EOF character) */ | |
1032 | #define STIR421X_PATCH_END_OF_HDR_TAG 0x1A | |
1033 | #define STIR421X_PATCH_BLOCK_SIZE 1023 | |
137dc023 SO |
1034 | |
1035 | /* | |
8ef80aef NF |
1036 | * Function stir421x_fwupload (struct irda_usb_cb *self, |
1037 | * unsigned char *patch, | |
1038 | * const unsigned int patch_len) | |
1039 | * | |
1040 | * Upload firmware code to SigmaTel 421X IRDA-USB dongle | |
137dc023 | 1041 | */ |
8ef80aef NF |
1042 | static int stir421x_fw_upload(struct irda_usb_cb *self, |
1043 | unsigned char *patch, | |
1044 | const unsigned int patch_len) | |
137dc023 | 1045 | { |
8ef80aef NF |
1046 | int ret = -ENOMEM; |
1047 | int actual_len = 0; | |
1048 | unsigned int i; | |
1049 | unsigned int block_size = 0; | |
1050 | unsigned char *patch_block; | |
1051 | ||
1052 | patch_block = kzalloc(STIR421X_PATCH_BLOCK_SIZE, GFP_KERNEL); | |
1053 | if (patch_block == NULL) | |
1054 | return -ENOMEM; | |
1055 | ||
1056 | /* break up patch into 1023-byte sections */ | |
1057 | for (i = 0; i < patch_len; i += block_size) { | |
1058 | block_size = patch_len - i; | |
1059 | ||
1060 | if (block_size > STIR421X_PATCH_BLOCK_SIZE) | |
1061 | block_size = STIR421X_PATCH_BLOCK_SIZE; | |
1062 | ||
1063 | /* upload the patch section */ | |
1064 | memcpy(patch_block, patch + i, block_size); | |
1065 | ||
1066 | ret = usb_bulk_msg(self->usbdev, | |
1067 | usb_sndbulkpipe(self->usbdev, | |
1068 | self->bulk_out_ep), | |
1069 | patch_block, block_size, | |
1070 | &actual_len, msecs_to_jiffies(500)); | |
1071 | IRDA_DEBUG(3,"%s(): Bulk send %u bytes, ret=%d\n", | |
1072 | __FUNCTION__, actual_len, ret); | |
1073 | ||
1074 | if (ret < 0) | |
1075 | break; | |
137dc023 SO |
1076 | } |
1077 | ||
8ef80aef | 1078 | kfree(patch_block); |
137dc023 | 1079 | |
8ef80aef NF |
1080 | return ret; |
1081 | } | |
137dc023 | 1082 | |
8ef80aef NF |
1083 | /* |
1084 | * Function stir421x_patch_device(struct irda_usb_cb *self) | |
1085 | * | |
1086 | * Get a firmware code from userspase using hotplug request_firmware() call | |
1087 | */ | |
137dc023 SO |
1088 | static int stir421x_patch_device(struct irda_usb_cb *self) |
1089 | { | |
8ef80aef NF |
1090 | unsigned int i; |
1091 | int ret; | |
1092 | char stir421x_fw_name[11]; | |
1093 | const struct firmware *fw; | |
1094 | unsigned char *fw_version_ptr; /* pointer to version string */ | |
1095 | unsigned long fw_version = 0; | |
1096 | ||
1097 | /* | |
1098 | * Known firmware patch file names for STIR421x dongles | |
1099 | * are "42101001.sb" or "42101002.sb" | |
1100 | */ | |
1101 | sprintf(stir421x_fw_name, "4210%4X.sb", | |
1102 | self->usbdev->descriptor.bcdDevice); | |
1103 | ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev); | |
1104 | if (ret < 0) | |
1105 | return ret; | |
1106 | ||
1107 | /* We get a patch from userspace */ | |
ed6a2090 | 1108 | IRDA_MESSAGE("%s(): Received firmware %s (%zu bytes)\n", |
8ef80aef NF |
1109 | __FUNCTION__, stir421x_fw_name, fw->size); |
1110 | ||
1111 | ret = -EINVAL; | |
1112 | ||
1113 | /* Get the bcd product version */ | |
1114 | if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER, | |
1115 | sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) { | |
1116 | fw_version_ptr = fw->data + | |
1117 | sizeof(STIR421X_PATCH_PRODUCT_VER) - 1; | |
1118 | ||
1119 | /* Let's check if the product version is dotted */ | |
1120 | if (fw_version_ptr[3] == '.' && | |
1121 | fw_version_ptr[7] == '.') { | |
1122 | unsigned long major, minor, build; | |
1123 | major = simple_strtoul(fw_version_ptr, NULL, 10); | |
1124 | minor = simple_strtoul(fw_version_ptr + 4, NULL, 10); | |
1125 | build = simple_strtoul(fw_version_ptr + 8, NULL, 10); | |
1126 | ||
1127 | fw_version = (major << 12) | |
1128 | + (minor << 8) | |
1129 | + ((build / 10) << 4) | |
1130 | + (build % 10); | |
1131 | ||
1132 | IRDA_DEBUG(3, "%s(): Firmware Product version %ld\n", | |
1133 | __FUNCTION__, fw_version); | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | if (self->usbdev->descriptor.bcdDevice == fw_version) { | |
1138 | /* | |
1139 | * If we're here, we've found a correct patch | |
1140 | * The actual image starts after the "STMP" keyword | |
1141 | * so forward to the firmware header tag | |
1142 | */ | |
1143 | for (i = 0; (fw->data[i] != STIR421X_PATCH_END_OF_HDR_TAG) | |
1144 | && (i < fw->size); i++) ; | |
1145 | /* here we check for the out of buffer case */ | |
1146 | if ((STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i]) | |
1147 | && (i < STIR421X_PATCH_CODE_OFFSET)) { | |
1148 | if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG, | |
1149 | sizeof(STIR421X_PATCH_STMP_TAG) - 1)) { | |
1150 | ||
1151 | /* We can upload the patch to the target */ | |
1152 | i += sizeof(STIR421X_PATCH_STMP_TAG); | |
1153 | ret = stir421x_fw_upload(self, &fw->data[i], | |
1154 | fw->size - i); | |
1155 | } | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | release_firmware(fw); | |
1160 | ||
1161 | return ret; | |
137dc023 SO |
1162 | } |
1163 | ||
1164 | ||
1da177e4 LT |
1165 | /********************** IRDA DEVICE CALLBACKS **********************/ |
1166 | /* | |
1167 | * Main calls from the IrDA/Network subsystem. | |
1168 | * Mostly registering a new irda-usb device and removing it.... | |
1169 | * We only deal with the IrDA side of the business, the USB side will | |
1170 | * be dealt with below... | |
1171 | */ | |
1172 | ||
1173 | ||
1174 | /*------------------------------------------------------------------*/ | |
1175 | /* | |
1176 | * Function irda_usb_net_open (dev) | |
1177 | * | |
1178 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" | |
1179 | * | |
1180 | * Note : don't mess with self->netopen - Jean II | |
1181 | */ | |
1182 | static int irda_usb_net_open(struct net_device *netdev) | |
1183 | { | |
1184 | struct irda_usb_cb *self; | |
1185 | char hwname[16]; | |
1186 | int i; | |
1187 | ||
1188 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1189 | ||
1190 | IRDA_ASSERT(netdev != NULL, return -1;); | |
1191 | self = (struct irda_usb_cb *) netdev->priv; | |
1192 | IRDA_ASSERT(self != NULL, return -1;); | |
1193 | ||
1194 | /* Can only open the device if it's there */ | |
1195 | if(!self->present) { | |
1196 | IRDA_WARNING("%s(), device not present!\n", __FUNCTION__); | |
1197 | return -1; | |
1198 | } | |
1199 | ||
137dc023 SO |
1200 | if(self->needspatch) { |
1201 | IRDA_WARNING("%s(), device needs patch\n", __FUNCTION__) ; | |
1202 | return -EIO ; | |
1203 | } | |
1204 | ||
1da177e4 LT |
1205 | /* Initialise default speed and xbofs value |
1206 | * (IrLAP will change that soon) */ | |
1207 | self->speed = -1; | |
1208 | self->xbofs = -1; | |
1209 | self->new_speed = -1; | |
1210 | self->new_xbofs = -1; | |
1211 | ||
1212 | /* To do *before* submitting Rx urbs and starting net Tx queue | |
1213 | * Jean II */ | |
1214 | self->netopen = 1; | |
1215 | ||
1216 | /* | |
1217 | * Now that everything should be initialized properly, | |
1218 | * Open new IrLAP layer instance to take care of us... | |
1219 | * Note : will send immediately a speed change... | |
1220 | */ | |
1221 | sprintf(hwname, "usb#%d", self->usbdev->devnum); | |
1222 | self->irlap = irlap_open(netdev, &self->qos, hwname); | |
1223 | IRDA_ASSERT(self->irlap != NULL, return -1;); | |
1224 | ||
1225 | /* Allow IrLAP to send data to us */ | |
1226 | netif_start_queue(netdev); | |
1227 | ||
1228 | /* We submit all the Rx URB except for one that we keep idle. | |
1229 | * Need to be initialised before submitting other USBs, because | |
1230 | * in some cases as soon as we submit the URBs the USB layer | |
1231 | * will trigger a dummy receive - Jean II */ | |
1232 | self->idle_rx_urb = self->rx_urb[IU_MAX_ACTIVE_RX_URBS]; | |
1233 | self->idle_rx_urb->context = NULL; | |
1234 | ||
1235 | /* Now that we can pass data to IrLAP, allow the USB layer | |
1236 | * to send us some data... */ | |
1237 | for (i = 0; i < IU_MAX_ACTIVE_RX_URBS; i++) { | |
1238 | struct sk_buff *skb = dev_alloc_skb(IRDA_SKB_MAX_MTU); | |
1239 | if (!skb) { | |
1240 | /* If this ever happen, we are in deep s***. | |
1241 | * Basically, we can't start the Rx path... */ | |
1242 | IRDA_WARNING("%s(), Failed to allocate Rx skb\n", | |
1243 | __FUNCTION__); | |
1244 | return -1; | |
1245 | } | |
1246 | //skb_reserve(newskb, USB_IRDA_HEADER - 1); | |
1247 | irda_usb_submit(self, skb, self->rx_urb[i]); | |
1248 | } | |
1249 | ||
1250 | /* Ready to play !!! */ | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | /*------------------------------------------------------------------*/ | |
1255 | /* | |
1256 | * Function irda_usb_net_close (self) | |
1257 | * | |
1258 | * Network device is taken down. Usually this is done by | |
1259 | * "ifconfig irda0 down" | |
1260 | */ | |
1261 | static int irda_usb_net_close(struct net_device *netdev) | |
1262 | { | |
1263 | struct irda_usb_cb *self; | |
1264 | int i; | |
1265 | ||
1266 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1267 | ||
1268 | IRDA_ASSERT(netdev != NULL, return -1;); | |
1269 | self = (struct irda_usb_cb *) netdev->priv; | |
1270 | IRDA_ASSERT(self != NULL, return -1;); | |
1271 | ||
1272 | /* Clear this flag *before* unlinking the urbs and *before* | |
1273 | * stopping the network Tx queue - Jean II */ | |
1274 | self->netopen = 0; | |
1275 | ||
1276 | /* Stop network Tx queue */ | |
1277 | netif_stop_queue(netdev); | |
1278 | ||
669d32a2 JT |
1279 | /* Kill defered Rx URB */ |
1280 | del_timer(&self->rx_defer_timer); | |
1281 | ||
1da177e4 | 1282 | /* Deallocate all the Rx path buffers (URBs and skb) */ |
137dc023 | 1283 | for (i = 0; i < self->max_rx_urb; i++) { |
1da177e4 LT |
1284 | struct urb *urb = self->rx_urb[i]; |
1285 | struct sk_buff *skb = (struct sk_buff *) urb->context; | |
1286 | /* Cancel the receive command */ | |
1287 | usb_kill_urb(urb); | |
1288 | /* The skb is ours, free it */ | |
1289 | if(skb) { | |
1290 | dev_kfree_skb(skb); | |
1291 | urb->context = NULL; | |
1292 | } | |
1293 | } | |
1294 | /* Cancel Tx and speed URB - need to be synchronous to avoid races */ | |
1da177e4 | 1295 | usb_kill_urb(self->tx_urb); |
1da177e4 LT |
1296 | usb_kill_urb(self->speed_urb); |
1297 | ||
1298 | /* Stop and remove instance of IrLAP */ | |
1299 | if (self->irlap) | |
1300 | irlap_close(self->irlap); | |
1301 | self->irlap = NULL; | |
1302 | ||
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | /*------------------------------------------------------------------*/ | |
1307 | /* | |
1308 | * IOCTLs : Extra out-of-band network commands... | |
1309 | */ | |
1310 | static int irda_usb_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
1311 | { | |
1312 | unsigned long flags; | |
1313 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
1314 | struct irda_usb_cb *self; | |
1315 | int ret = 0; | |
1316 | ||
1317 | IRDA_ASSERT(dev != NULL, return -1;); | |
1318 | self = dev->priv; | |
1319 | IRDA_ASSERT(self != NULL, return -1;); | |
1320 | ||
1321 | IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd); | |
1322 | ||
1323 | switch (cmd) { | |
1324 | case SIOCSBANDWIDTH: /* Set bandwidth */ | |
1325 | if (!capable(CAP_NET_ADMIN)) | |
1326 | return -EPERM; | |
1327 | /* Protect us from USB callbacks, net watchdog and else. */ | |
1328 | spin_lock_irqsave(&self->lock, flags); | |
1329 | /* Check if the device is still there */ | |
1330 | if(self->present) { | |
1331 | /* Set the desired speed */ | |
1332 | self->new_speed = irq->ifr_baudrate; | |
1333 | irda_usb_change_speed_xbofs(self); | |
1334 | } | |
1335 | spin_unlock_irqrestore(&self->lock, flags); | |
1336 | break; | |
1337 | case SIOCSMEDIABUSY: /* Set media busy */ | |
1338 | if (!capable(CAP_NET_ADMIN)) | |
1339 | return -EPERM; | |
1340 | /* Check if the IrDA stack is still there */ | |
1341 | if(self->netopen) | |
1342 | irda_device_set_media_busy(self->netdev, TRUE); | |
1343 | break; | |
1344 | case SIOCGRECEIVING: /* Check if we are receiving right now */ | |
1345 | irq->ifr_receiving = irda_usb_is_receiving(self); | |
1346 | break; | |
1347 | default: | |
1348 | ret = -EOPNOTSUPP; | |
1349 | } | |
1350 | ||
1351 | return ret; | |
1352 | } | |
1353 | ||
1354 | /*------------------------------------------------------------------*/ | |
1355 | /* | |
1356 | * Get device stats (for /proc/net/dev and ifconfig) | |
1357 | */ | |
1358 | static struct net_device_stats *irda_usb_net_get_stats(struct net_device *dev) | |
1359 | { | |
1360 | struct irda_usb_cb *self = dev->priv; | |
1361 | return &self->stats; | |
1362 | } | |
1363 | ||
1364 | /********************* IRDA CONFIG SUBROUTINES *********************/ | |
1365 | /* | |
1366 | * Various subroutines dealing with IrDA and network stuff we use to | |
1367 | * configure and initialise each irda-usb instance. | |
1368 | * These functions are used below in the main calls of the driver... | |
1369 | */ | |
1370 | ||
1371 | /*------------------------------------------------------------------*/ | |
1372 | /* | |
1373 | * Set proper values in the IrDA QOS structure | |
1374 | */ | |
1375 | static inline void irda_usb_init_qos(struct irda_usb_cb *self) | |
1376 | { | |
1377 | struct irda_class_desc *desc; | |
1378 | ||
1379 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); | |
1380 | ||
1381 | desc = self->irda_desc; | |
1382 | ||
1383 | /* Initialize QoS for this device */ | |
1384 | irda_init_max_qos_capabilies(&self->qos); | |
1385 | ||
1386 | /* See spec section 7.2 for meaning. | |
1387 | * Values are little endian (as most USB stuff), the IrDA stack | |
1388 | * use it in native order (see parameters.c). - Jean II */ | |
1389 | self->qos.baud_rate.bits = le16_to_cpu(desc->wBaudRate); | |
1390 | self->qos.min_turn_time.bits = desc->bmMinTurnaroundTime; | |
1391 | self->qos.additional_bofs.bits = desc->bmAdditionalBOFs; | |
1392 | self->qos.window_size.bits = desc->bmWindowSize; | |
1393 | self->qos.data_size.bits = desc->bmDataSize; | |
1394 | ||
1395 | IRDA_DEBUG(0, "%s(), dongle says speed=0x%X, size=0x%X, window=0x%X, bofs=0x%X, turn=0x%X\n", | |
1396 | __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); | |
1397 | ||
1398 | /* Don't always trust what the dongle tell us */ | |
1399 | if(self->capability & IUC_SIR_ONLY) | |
1400 | self->qos.baud_rate.bits &= 0x00ff; | |
1401 | if(self->capability & IUC_SMALL_PKT) | |
1402 | self->qos.data_size.bits = 0x07; | |
1403 | if(self->capability & IUC_NO_WINDOW) | |
1404 | self->qos.window_size.bits = 0x01; | |
1405 | if(self->capability & IUC_MAX_WINDOW) | |
1406 | self->qos.window_size.bits = 0x7f; | |
1407 | if(self->capability & IUC_MAX_XBOFS) | |
1408 | self->qos.additional_bofs.bits = 0x01; | |
1409 | ||
1410 | #if 1 | |
1411 | /* Module parameter can override the rx window size */ | |
1412 | if (qos_mtt_bits) | |
1413 | self->qos.min_turn_time.bits = qos_mtt_bits; | |
1414 | #endif | |
1415 | /* | |
1416 | * Note : most of those values apply only for the receive path, | |
1417 | * the transmit path will be set differently - Jean II | |
1418 | */ | |
1419 | irda_qos_bits_to_value(&self->qos); | |
1420 | } | |
1421 | ||
1422 | /*------------------------------------------------------------------*/ | |
1423 | /* | |
1424 | * Initialise the network side of the irda-usb instance | |
1425 | * Called when a new USB instance is registered in irda_usb_probe() | |
1426 | */ | |
1427 | static inline int irda_usb_open(struct irda_usb_cb *self) | |
1428 | { | |
1429 | struct net_device *netdev = self->netdev; | |
1430 | ||
1431 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1432 | ||
1433 | irda_usb_init_qos(self); | |
1434 | ||
1435 | /* Override the network functions we need to use */ | |
1436 | netdev->hard_start_xmit = irda_usb_hard_xmit; | |
1437 | netdev->tx_timeout = irda_usb_net_timeout; | |
1438 | netdev->watchdog_timeo = 250*HZ/1000; /* 250 ms > USB timeout */ | |
1439 | netdev->open = irda_usb_net_open; | |
1440 | netdev->stop = irda_usb_net_close; | |
1441 | netdev->get_stats = irda_usb_net_get_stats; | |
1442 | netdev->do_ioctl = irda_usb_net_ioctl; | |
1443 | ||
1444 | return register_netdev(netdev); | |
1445 | } | |
1446 | ||
1447 | /*------------------------------------------------------------------*/ | |
1448 | /* | |
1449 | * Cleanup the network side of the irda-usb instance | |
1450 | * Called when a USB instance is removed in irda_usb_disconnect() | |
1451 | */ | |
1452 | static inline void irda_usb_close(struct irda_usb_cb *self) | |
1453 | { | |
1454 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1455 | ||
1456 | /* Remove netdevice */ | |
1457 | unregister_netdev(self->netdev); | |
1458 | ||
1459 | /* Remove the speed buffer */ | |
b4558ea9 JJ |
1460 | kfree(self->speed_buff); |
1461 | self->speed_buff = NULL; | |
1da177e4 LT |
1462 | } |
1463 | ||
1464 | /********************** USB CONFIG SUBROUTINES **********************/ | |
1465 | /* | |
1466 | * Various subroutines dealing with USB stuff we use to configure and | |
1467 | * initialise each irda-usb instance. | |
1468 | * These functions are used below in the main calls of the driver... | |
1469 | */ | |
1470 | ||
1471 | /*------------------------------------------------------------------*/ | |
1472 | /* | |
1473 | * Function irda_usb_parse_endpoints(dev, ifnum) | |
1474 | * | |
1475 | * Parse the various endpoints and find the one we need. | |
1476 | * | |
1477 | * The endpoint are the pipes used to communicate with the USB device. | |
1478 | * The spec defines 2 endpoints of type bulk transfer, one in, and one out. | |
1479 | * These are used to pass frames back and forth with the dongle. | |
1480 | * Most dongle have also an interrupt endpoint, that will be probably | |
1481 | * documented in the next spec... | |
1482 | */ | |
1483 | static inline int irda_usb_parse_endpoints(struct irda_usb_cb *self, struct usb_host_endpoint *endpoint, int ennum) | |
1484 | { | |
1485 | int i; /* Endpoint index in table */ | |
1486 | ||
1487 | /* Init : no endpoints */ | |
1488 | self->bulk_in_ep = 0; | |
1489 | self->bulk_out_ep = 0; | |
1490 | self->bulk_int_ep = 0; | |
1491 | ||
1492 | /* Let's look at all those endpoints */ | |
1493 | for(i = 0; i < ennum; i++) { | |
1494 | /* All those variables will get optimised by the compiler, | |
1495 | * so let's aim for clarity... - Jean II */ | |
1496 | __u8 ep; /* Endpoint address */ | |
1497 | __u8 dir; /* Endpoint direction */ | |
1498 | __u8 attr; /* Endpoint attribute */ | |
1499 | __u16 psize; /* Endpoint max packet size in bytes */ | |
1500 | ||
1501 | /* Get endpoint address, direction and attribute */ | |
1502 | ep = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; | |
1503 | dir = endpoint[i].desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK; | |
1504 | attr = endpoint[i].desc.bmAttributes; | |
1505 | psize = le16_to_cpu(endpoint[i].desc.wMaxPacketSize); | |
1506 | ||
1507 | /* Is it a bulk endpoint ??? */ | |
1508 | if(attr == USB_ENDPOINT_XFER_BULK) { | |
1509 | /* We need to find an IN and an OUT */ | |
1510 | if(dir == USB_DIR_IN) { | |
1511 | /* This is our Rx endpoint */ | |
1512 | self->bulk_in_ep = ep; | |
1513 | } else { | |
1514 | /* This is our Tx endpoint */ | |
1515 | self->bulk_out_ep = ep; | |
1516 | self->bulk_out_mtu = psize; | |
1517 | } | |
1518 | } else { | |
1519 | if((attr == USB_ENDPOINT_XFER_INT) && | |
1520 | (dir == USB_DIR_IN)) { | |
1521 | /* This is our interrupt endpoint */ | |
1522 | self->bulk_int_ep = ep; | |
1523 | } else { | |
1524 | IRDA_ERROR("%s(), Unrecognised endpoint %02X.\n", __FUNCTION__, ep); | |
1525 | } | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | IRDA_DEBUG(0, "%s(), And our endpoints are : in=%02X, out=%02X (%d), int=%02X\n", | |
1530 | __FUNCTION__, self->bulk_in_ep, self->bulk_out_ep, self->bulk_out_mtu, self->bulk_int_ep); | |
1531 | /* Should be 8, 16, 32 or 64 bytes */ | |
1532 | IRDA_ASSERT(self->bulk_out_mtu == 64, ;); | |
1533 | ||
1534 | return((self->bulk_in_ep != 0) && (self->bulk_out_ep != 0)); | |
1535 | } | |
1536 | ||
1537 | #ifdef IU_DUMP_CLASS_DESC | |
1538 | /*------------------------------------------------------------------*/ | |
1539 | /* | |
1540 | * Function usb_irda_dump_class_desc(desc) | |
1541 | * | |
1542 | * Prints out the contents of the IrDA class descriptor | |
1543 | * | |
1544 | */ | |
1545 | static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc) | |
1546 | { | |
1547 | /* Values are little endian */ | |
1548 | printk("bLength=%x\n", desc->bLength); | |
1549 | printk("bDescriptorType=%x\n", desc->bDescriptorType); | |
1550 | printk("bcdSpecRevision=%x\n", le16_to_cpu(desc->bcdSpecRevision)); | |
1551 | printk("bmDataSize=%x\n", desc->bmDataSize); | |
1552 | printk("bmWindowSize=%x\n", desc->bmWindowSize); | |
1553 | printk("bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime); | |
1554 | printk("wBaudRate=%x\n", le16_to_cpu(desc->wBaudRate)); | |
1555 | printk("bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs); | |
1556 | printk("bIrdaRateSniff=%x\n", desc->bIrdaRateSniff); | |
1557 | printk("bMaxUnicastList=%x\n", desc->bMaxUnicastList); | |
1558 | } | |
1559 | #endif /* IU_DUMP_CLASS_DESC */ | |
1560 | ||
1561 | /*------------------------------------------------------------------*/ | |
1562 | /* | |
1563 | * Function irda_usb_find_class_desc(intf) | |
1564 | * | |
1565 | * Returns instance of IrDA class descriptor, or NULL if not found | |
1566 | * | |
1567 | * The class descriptor is some extra info that IrDA USB devices will | |
1568 | * offer to us, describing their IrDA characteristics. We will use that in | |
1569 | * irda_usb_init_qos() | |
1570 | */ | |
1571 | static inline struct irda_class_desc *irda_usb_find_class_desc(struct usb_interface *intf) | |
1572 | { | |
1573 | struct usb_device *dev = interface_to_usbdev (intf); | |
1574 | struct irda_class_desc *desc; | |
1575 | int ret; | |
1576 | ||
1577 | desc = kmalloc(sizeof (*desc), GFP_KERNEL); | |
1578 | if (desc == NULL) | |
1579 | return NULL; | |
1580 | memset(desc, 0, sizeof(*desc)); | |
1581 | ||
1582 | /* USB-IrDA class spec 1.0: | |
1583 | * 6.1.3: Standard "Get Descriptor" Device Request is not | |
1584 | * appropriate to retrieve class-specific descriptor | |
1585 | * 6.2.5: Class Specific "Get Class Descriptor" Interface Request | |
1586 | * is mandatory and returns the USB-IrDA class descriptor | |
1587 | */ | |
1588 | ||
1589 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0), | |
1590 | IU_REQ_GET_CLASS_DESC, | |
1591 | USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
1592 | 0, intf->altsetting->desc.bInterfaceNumber, desc, | |
1593 | sizeof(*desc), 500); | |
1594 | ||
1595 | IRDA_DEBUG(1, "%s(), ret=%d\n", __FUNCTION__, ret); | |
1596 | if (ret < sizeof(*desc)) { | |
1597 | IRDA_WARNING("usb-irda: class_descriptor read %s (%d)\n", | |
1598 | (ret<0) ? "failed" : "too short", ret); | |
1599 | } | |
1600 | else if (desc->bDescriptorType != USB_DT_IRDA) { | |
1601 | IRDA_WARNING("usb-irda: bad class_descriptor type\n"); | |
1602 | } | |
1603 | else { | |
1604 | #ifdef IU_DUMP_CLASS_DESC | |
1605 | irda_usb_dump_class_desc(desc); | |
1606 | #endif /* IU_DUMP_CLASS_DESC */ | |
1607 | ||
1608 | return desc; | |
1609 | } | |
1610 | kfree(desc); | |
1611 | return NULL; | |
1612 | } | |
1613 | ||
1614 | /*********************** USB DEVICE CALLBACKS ***********************/ | |
1615 | /* | |
1616 | * Main calls from the USB subsystem. | |
1617 | * Mostly registering a new irda-usb device and removing it.... | |
1618 | */ | |
1619 | ||
1620 | /*------------------------------------------------------------------*/ | |
1621 | /* | |
1622 | * This routine is called by the USB subsystem for each new device | |
1623 | * in the system. We need to check if the device is ours, and in | |
1624 | * this case start handling it. | |
1625 | * The USB layer protect us from reentrancy (via BKL), so we don't need | |
1626 | * to spinlock in there... Jean II | |
1627 | */ | |
1628 | static int irda_usb_probe(struct usb_interface *intf, | |
1629 | const struct usb_device_id *id) | |
1630 | { | |
1631 | struct net_device *net; | |
1632 | struct usb_device *dev = interface_to_usbdev(intf); | |
1633 | struct irda_usb_cb *self = NULL; | |
1634 | struct usb_host_interface *interface; | |
1635 | struct irda_class_desc *irda_desc; | |
1636 | int ret = -ENOMEM; | |
1637 | int i; /* Driver instance index / Rx URB index */ | |
1638 | ||
1639 | /* Note : the probe make sure to call us only for devices that | |
1640 | * matches the list of dongle (top of the file). So, we | |
1641 | * don't need to check if the dongle is really ours. | |
1642 | * Jean II */ | |
1643 | ||
1644 | IRDA_MESSAGE("IRDA-USB found at address %d, Vendor: %x, Product: %x\n", | |
1645 | dev->devnum, le16_to_cpu(dev->descriptor.idVendor), | |
1646 | le16_to_cpu(dev->descriptor.idProduct)); | |
1647 | ||
1648 | net = alloc_irdadev(sizeof(*self)); | |
1649 | if (!net) | |
1650 | goto err_out; | |
1651 | ||
1652 | SET_MODULE_OWNER(net); | |
1653 | SET_NETDEV_DEV(net, &intf->dev); | |
1654 | self = net->priv; | |
1655 | self->netdev = net; | |
1656 | spin_lock_init(&self->lock); | |
669d32a2 | 1657 | init_timer(&self->rx_defer_timer); |
1da177e4 | 1658 | |
137dc023 | 1659 | self->capability = id->driver_info; |
8ef80aef | 1660 | self->needspatch = ((self->capability & IUC_STIR421X) != 0); |
137dc023 | 1661 | |
1da177e4 | 1662 | /* Create all of the needed urbs */ |
8ef80aef | 1663 | if (self->capability & IUC_STIR421X) { |
137dc023 | 1664 | self->max_rx_urb = IU_SIGMATEL_MAX_RX_URBS; |
8ef80aef | 1665 | self->header_length = USB_IRDA_STIR421X_HEADER; |
137dc023 SO |
1666 | } else { |
1667 | self->max_rx_urb = IU_MAX_RX_URBS; | |
1668 | self->header_length = USB_IRDA_HEADER; | |
1669 | } | |
1670 | ||
1671 | self->rx_urb = kzalloc(self->max_rx_urb * sizeof(struct urb *), | |
1672 | GFP_KERNEL); | |
1673 | ||
1674 | for (i = 0; i < self->max_rx_urb; i++) { | |
1da177e4 LT |
1675 | self->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); |
1676 | if (!self->rx_urb[i]) { | |
1677 | goto err_out_1; | |
1678 | } | |
1679 | } | |
1680 | self->tx_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1681 | if (!self->tx_urb) { | |
1682 | goto err_out_1; | |
1683 | } | |
1684 | self->speed_urb = usb_alloc_urb(0, GFP_KERNEL); | |
1685 | if (!self->speed_urb) { | |
1686 | goto err_out_2; | |
1687 | } | |
1688 | ||
1689 | /* Is this really necessary? (no, except maybe for broken devices) */ | |
1690 | if (usb_reset_configuration (dev) < 0) { | |
1691 | err("reset_configuration failed"); | |
1692 | ret = -EIO; | |
1693 | goto err_out_3; | |
1694 | } | |
1695 | ||
1696 | /* Is this really necessary? */ | |
1697 | /* Note : some driver do hardcode the interface number, some others | |
1698 | * specify an alternate, but very few driver do like this. | |
1699 | * Jean II */ | |
1700 | ret = usb_set_interface(dev, intf->altsetting->desc.bInterfaceNumber, 0); | |
1701 | IRDA_DEBUG(1, "usb-irda: set interface %d result %d\n", intf->altsetting->desc.bInterfaceNumber, ret); | |
1702 | switch (ret) { | |
1703 | case 0: | |
1704 | break; | |
1705 | case -EPIPE: /* -EPIPE = -32 */ | |
1706 | /* Martin Diehl says if we get a -EPIPE we should | |
1707 | * be fine and we don't need to do a usb_clear_halt(). | |
1708 | * - Jean II */ | |
1709 | IRDA_DEBUG(0, "%s(), Received -EPIPE, ignoring...\n", __FUNCTION__); | |
1710 | break; | |
1711 | default: | |
1712 | IRDA_DEBUG(0, "%s(), Unknown error %d\n", __FUNCTION__, ret); | |
1713 | ret = -EIO; | |
1714 | goto err_out_3; | |
1715 | } | |
1716 | ||
1717 | /* Find our endpoints */ | |
1718 | interface = intf->cur_altsetting; | |
1719 | if(!irda_usb_parse_endpoints(self, interface->endpoint, | |
1720 | interface->desc.bNumEndpoints)) { | |
1721 | IRDA_ERROR("%s(), Bogus endpoints...\n", __FUNCTION__); | |
1722 | ret = -EIO; | |
1723 | goto err_out_3; | |
1724 | } | |
1725 | ||
137dc023 SO |
1726 | self->usbdev = dev; |
1727 | ||
1da177e4 LT |
1728 | /* Find IrDA class descriptor */ |
1729 | irda_desc = irda_usb_find_class_desc(intf); | |
1730 | ret = -ENODEV; | |
1731 | if (irda_desc == NULL) | |
1732 | goto err_out_3; | |
1733 | ||
137dc023 SO |
1734 | if (self->needspatch) { |
1735 | ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0), | |
0eb1bd21 | 1736 | 0x02, 0x40, 0, 0, NULL, 0, 500); |
137dc023 SO |
1737 | if (ret < 0) { |
1738 | IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret); | |
1739 | goto err_out_3; | |
1740 | } else { | |
1741 | mdelay(10); | |
1742 | } | |
1743 | } | |
1744 | ||
1da177e4 LT |
1745 | self->irda_desc = irda_desc; |
1746 | self->present = 1; | |
1747 | self->netopen = 0; | |
1da177e4 LT |
1748 | self->usbintf = intf; |
1749 | ||
1750 | /* Allocate the buffer for speed changes */ | |
1751 | /* Don't change this buffer size and allocation without doing | |
1752 | * some heavy and complete testing. Don't ask why :-( | |
1753 | * Jean II */ | |
1754 | self->speed_buff = (char *) kmalloc(IRDA_USB_SPEED_MTU, GFP_KERNEL); | |
1755 | if (self->speed_buff == NULL) | |
1756 | goto err_out_3; | |
1757 | ||
1758 | memset(self->speed_buff, 0, IRDA_USB_SPEED_MTU); | |
1759 | ||
1760 | ret = irda_usb_open(self); | |
1761 | if (ret) | |
1762 | goto err_out_4; | |
1763 | ||
1764 | IRDA_MESSAGE("IrDA: Registered device %s\n", net->name); | |
1765 | usb_set_intfdata(intf, self); | |
137dc023 SO |
1766 | |
1767 | if (self->needspatch) { | |
1768 | /* Now we fetch and upload the firmware patch */ | |
1769 | ret = stir421x_patch_device(self); | |
1770 | self->needspatch = (ret < 0); | |
8ef80aef NF |
1771 | if (self->needspatch) { |
1772 | IRDA_ERROR("STIR421X: Couldn't upload patch\n"); | |
269690ac | 1773 | goto err_out_5; |
137dc023 SO |
1774 | } |
1775 | ||
1776 | /* replace IrDA class descriptor with what patched device is now reporting */ | |
1777 | irda_desc = irda_usb_find_class_desc (self->usbintf); | |
1778 | if (irda_desc == NULL) { | |
1779 | ret = -ENODEV; | |
269690ac | 1780 | goto err_out_5; |
137dc023 SO |
1781 | } |
1782 | if (self->irda_desc) | |
1783 | kfree (self->irda_desc); | |
1784 | self->irda_desc = irda_desc; | |
1785 | irda_usb_init_qos(self); | |
1786 | } | |
1787 | ||
1da177e4 LT |
1788 | return 0; |
1789 | ||
269690ac SO |
1790 | err_out_5: |
1791 | unregister_netdev(self->netdev); | |
1da177e4 LT |
1792 | err_out_4: |
1793 | kfree(self->speed_buff); | |
1794 | err_out_3: | |
1795 | /* Free all urbs that we may have created */ | |
1796 | usb_free_urb(self->speed_urb); | |
1797 | err_out_2: | |
1798 | usb_free_urb(self->tx_urb); | |
1799 | err_out_1: | |
137dc023 | 1800 | for (i = 0; i < self->max_rx_urb; i++) { |
1da177e4 LT |
1801 | if (self->rx_urb[i]) |
1802 | usb_free_urb(self->rx_urb[i]); | |
1803 | } | |
1804 | free_netdev(net); | |
1805 | err_out: | |
1806 | return ret; | |
1807 | } | |
1808 | ||
1809 | /*------------------------------------------------------------------*/ | |
1810 | /* | |
1811 | * The current irda-usb device is removed, the USB layer tell us | |
1812 | * to shut it down... | |
1813 | * One of the constraints is that when we exit this function, | |
1814 | * we cannot use the usb_device no more. Gone. Destroyed. kfree(). | |
1815 | * Most other subsystem allow you to destroy the instance at a time | |
1816 | * when it's convenient to you, to postpone it to a later date, but | |
1817 | * not the USB subsystem. | |
1818 | * So, we must make bloody sure that everything gets deactivated. | |
1819 | * Jean II | |
1820 | */ | |
1821 | static void irda_usb_disconnect(struct usb_interface *intf) | |
1822 | { | |
1823 | unsigned long flags; | |
1824 | struct irda_usb_cb *self = usb_get_intfdata(intf); | |
1825 | int i; | |
1826 | ||
1827 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
1828 | ||
1829 | usb_set_intfdata(intf, NULL); | |
1830 | if (!self) | |
1831 | return; | |
1832 | ||
1833 | /* Make sure that the Tx path is not executing. - Jean II */ | |
1834 | spin_lock_irqsave(&self->lock, flags); | |
1835 | ||
1836 | /* Oups ! We are not there any more. | |
1837 | * This will stop/desactivate the Tx path. - Jean II */ | |
1838 | self->present = 0; | |
1839 | ||
669d32a2 JT |
1840 | /* Kill defered Rx URB */ |
1841 | del_timer(&self->rx_defer_timer); | |
1842 | ||
1da177e4 LT |
1843 | /* We need to have irq enabled to unlink the URBs. That's OK, |
1844 | * at this point the Tx path is gone - Jean II */ | |
1845 | spin_unlock_irqrestore(&self->lock, flags); | |
1846 | ||
1847 | /* Hum... Check if networking is still active (avoid races) */ | |
1848 | if((self->netopen) || (self->irlap)) { | |
1849 | /* Accept no more transmissions */ | |
1850 | /*netif_device_detach(self->netdev);*/ | |
1851 | netif_stop_queue(self->netdev); | |
669d32a2 | 1852 | /* Stop all the receive URBs. Must be synchronous. */ |
137dc023 | 1853 | for (i = 0; i < self->max_rx_urb; i++) |
1da177e4 LT |
1854 | usb_kill_urb(self->rx_urb[i]); |
1855 | /* Cancel Tx and speed URB. | |
669d32a2 | 1856 | * Make sure it's synchronous to avoid races. */ |
1da177e4 | 1857 | usb_kill_urb(self->tx_urb); |
1da177e4 LT |
1858 | usb_kill_urb(self->speed_urb); |
1859 | } | |
1860 | ||
1861 | /* Cleanup the device stuff */ | |
1862 | irda_usb_close(self); | |
1863 | /* No longer attached to USB bus */ | |
1864 | self->usbdev = NULL; | |
1865 | self->usbintf = NULL; | |
1866 | ||
1867 | /* Clean up our urbs */ | |
137dc023 | 1868 | for (i = 0; i < self->max_rx_urb; i++) |
1da177e4 | 1869 | usb_free_urb(self->rx_urb[i]); |
137dc023 | 1870 | kfree(self->rx_urb); |
1da177e4 LT |
1871 | /* Clean up Tx and speed URB */ |
1872 | usb_free_urb(self->tx_urb); | |
1873 | usb_free_urb(self->speed_urb); | |
1874 | ||
1875 | /* Free self and network device */ | |
1876 | free_netdev(self->netdev); | |
1877 | IRDA_DEBUG(0, "%s(), USB IrDA Disconnected\n", __FUNCTION__); | |
1878 | } | |
1879 | ||
1880 | /*------------------------------------------------------------------*/ | |
1881 | /* | |
1882 | * USB device callbacks | |
1883 | */ | |
1884 | static struct usb_driver irda_driver = { | |
1da177e4 LT |
1885 | .name = "irda-usb", |
1886 | .probe = irda_usb_probe, | |
1887 | .disconnect = irda_usb_disconnect, | |
1888 | .id_table = dongles, | |
1889 | }; | |
1890 | ||
1891 | /************************* MODULE CALLBACKS *************************/ | |
1892 | /* | |
1893 | * Deal with module insertion/removal | |
1894 | * Mostly tell USB about our existence | |
1895 | */ | |
1896 | ||
1897 | /*------------------------------------------------------------------*/ | |
1898 | /* | |
1899 | * Module insertion | |
1900 | */ | |
1901 | static int __init usb_irda_init(void) | |
1902 | { | |
1903 | int ret; | |
1904 | ||
1905 | ret = usb_register(&irda_driver); | |
1906 | if (ret < 0) | |
1907 | return ret; | |
1908 | ||
1909 | IRDA_MESSAGE("USB IrDA support registered\n"); | |
1910 | return 0; | |
1911 | } | |
1912 | module_init(usb_irda_init); | |
1913 | ||
1914 | /*------------------------------------------------------------------*/ | |
1915 | /* | |
1916 | * Module removal | |
1917 | */ | |
1918 | static void __exit usb_irda_cleanup(void) | |
1919 | { | |
1920 | /* Deregister the driver and remove all pending instances */ | |
1921 | usb_deregister(&irda_driver); | |
1922 | } | |
1923 | module_exit(usb_irda_cleanup); | |
1924 | ||
1925 | /*------------------------------------------------------------------*/ | |
1926 | /* | |
1927 | * Module parameters | |
1928 | */ | |
1929 | module_param(qos_mtt_bits, int, 0); | |
1930 | MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time"); | |
137dc023 SO |
1931 | MODULE_AUTHOR("Roman Weissgaerber <weissg@vienna.at>, Dag Brattli <dag@brattli.net>, Jean Tourrilhes <jt@hpl.hp.com> and Nick Fedchik <nick@fedchik.org.ua>"); |
1932 | MODULE_DESCRIPTION("IrDA-USB Dongle Driver"); | |
1da177e4 | 1933 | MODULE_LICENSE("GPL"); |