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Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
[wrt350n-kernel.git] / drivers / media / video / dabusb.c
bloba5731f90be0f842d39aa1a941c50d0ab31d3f6e9
1 /*****************************************************************************/
2
3 /*
4 * dabusb.c -- dab usb driver.
5 *
6 * Copyright (C) 1999 Deti Fliegl (deti@fliegl.de)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 *
23 *
24 * $Id: dabusb.c,v 1.54 2000/07/24 21:39:39 deti Exp $
25 *
26 */
27
28 /*****************************************************************************/
29
30 #include <linux/module.h>
31 #include <linux/socket.h>
32 #include <linux/list.h>
33 #include <linux/vmalloc.h>
34 #include <linux/slab.h>
35 #include <linux/init.h>
36 #include <asm/uaccess.h>
37 #include <asm/atomic.h>
38 #include <linux/delay.h>
39 #include <linux/usb.h>
40 #include <linux/mutex.h>
41
42 #include "dabusb.h"
43 #include "dabfirmware.h"
44
45 /*
46 * Version Information
47 */
48 #define DRIVER_VERSION "v1.54"
49 #define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de"
50 #define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999"
51
52 /* --------------------------------------------------------------------- */
53
54 #ifdef CONFIG_USB_DYNAMIC_MINORS
55 #define NRDABUSB 256
56 #else
57 #define NRDABUSB 4
58 #endif
59
60 /*-------------------------------------------------------------------*/
61
62 static dabusb_t dabusb[NRDABUSB];
63 static int buffers = 256;
64 static struct usb_driver dabusb_driver;
65
66 /*-------------------------------------------------------------------*/
67
68 static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src)
69 {
70 unsigned long flags;
71 struct list_head *tmp;
72 int ret = 0;
73
74 spin_lock_irqsave (&s->lock, flags);
75
76 if (list_empty (src)) {
77 // no elements in source buffer
78 ret = -1;
79 goto err;
80 }
81 tmp = src->next;
82 list_move_tail (tmp, dst);
83
84 err: spin_unlock_irqrestore (&s->lock, flags);
85 return ret;
86 }
87 /*-------------------------------------------------------------------*/
88 #ifdef DEBUG
89 static void dump_urb (struct urb *urb)
90 {
91 dbg("urb :%p", urb);
92 dbg("dev :%p", urb->dev);
93 dbg("pipe :%08X", urb->pipe);
94 dbg("status :%d", urb->status);
95 dbg("transfer_flags :%08X", urb->transfer_flags);
96 dbg("transfer_buffer :%p", urb->transfer_buffer);
97 dbg("transfer_buffer_length:%d", urb->transfer_buffer_length);
98 dbg("actual_length :%d", urb->actual_length);
99 dbg("setup_packet :%p", urb->setup_packet);
100 dbg("start_frame :%d", urb->start_frame);
101 dbg("number_of_packets :%d", urb->number_of_packets);
102 dbg("interval :%d", urb->interval);
103 dbg("error_count :%d", urb->error_count);
104 dbg("context :%p", urb->context);
105 dbg("complete :%p", urb->complete);
106 }
107 #endif
108 /*-------------------------------------------------------------------*/
109 static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q)
110 {
111 unsigned long flags;
112 pbuff_t b;
113
114 dbg("dabusb_cancel_queue");
115
116 spin_lock_irqsave (&s->lock, flags);
117
118 list_for_each_entry(b, q, buff_list) {
119 #ifdef DEBUG
120 dump_urb(b->purb);
121 #endif
122 usb_unlink_urb (b->purb);
123 }
124 spin_unlock_irqrestore (&s->lock, flags);
125 return 0;
126 }
127 /*-------------------------------------------------------------------*/
128 static int dabusb_free_queue (struct list_head *q)
129 {
130 struct list_head *tmp;
131 struct list_head *p;
132 pbuff_t b;
133
134 dbg("dabusb_free_queue");
135 for (p = q->next; p != q;) {
136 b = list_entry (p, buff_t, buff_list);
137
138 #ifdef DEBUG
139 dump_urb(b->purb);
140 #endif
141 kfree(b->purb->transfer_buffer);
142 usb_free_urb(b->purb);
143 tmp = p->next;
144 list_del (p);
145 kfree (b);
146 p = tmp;
147 }
148
149 return 0;
150 }
151 /*-------------------------------------------------------------------*/
152 static int dabusb_free_buffers (pdabusb_t s)
153 {
154 unsigned long flags;
155 dbg("dabusb_free_buffers");
156
157 spin_lock_irqsave(&s->lock, flags);
158
159 dabusb_free_queue (&s->free_buff_list);
160 dabusb_free_queue (&s->rec_buff_list);
161
162 spin_unlock_irqrestore(&s->lock, flags);
163
164 s->got_mem = 0;
165 return 0;
166 }
167 /*-------------------------------------------------------------------*/
168 static void dabusb_iso_complete (struct urb *purb)
169 {
170 pbuff_t b = purb->context;
171 pdabusb_t s = b->s;
172 int i;
173 int len;
174 int dst = 0;
175 void *buf = purb->transfer_buffer;
176
177 dbg("dabusb_iso_complete");
178
179 // process if URB was not killed
180 if (purb->status != -ENOENT) {
181 unsigned int pipe = usb_rcvisocpipe (purb->dev, _DABUSB_ISOPIPE);
182 int pipesize = usb_maxpacket (purb->dev, pipe, usb_pipeout (pipe));
183 for (i = 0; i < purb->number_of_packets; i++)
184 if (!purb->iso_frame_desc[i].status) {
185 len = purb->iso_frame_desc[i].actual_length;
186 if (len <= pipesize) {
187 memcpy (buf + dst, buf + purb->iso_frame_desc[i].offset, len);
188 dst += len;
189 }
190 else
191 err("dabusb_iso_complete: invalid len %d", len);
192 }
193 else
194 warn("dabusb_iso_complete: corrupted packet status: %d", purb->iso_frame_desc[i].status);
195 if (dst != purb->actual_length)
196 err("dst!=purb->actual_length:%d!=%d", dst, purb->actual_length);
197 }
198
199 if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) {
200 s->overruns++;
201 err("overrun (%d)", s->overruns);
202 }
203 wake_up (&s->wait);
204 }
205 /*-------------------------------------------------------------------*/
206 static int dabusb_alloc_buffers (pdabusb_t s)
207 {
208 int buffers = 0;
209 pbuff_t b;
210 unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE);
211 int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe));
212 int packets = _ISOPIPESIZE / pipesize;
213 int transfer_buffer_length = packets * pipesize;
214 int i;
215
216 dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d",
217 pipesize, packets, transfer_buffer_length);
218
219 while (buffers < (s->total_buffer_size << 10)) {
220 b = kzalloc(sizeof (buff_t), GFP_KERNEL);
221 if (!b) {
222 err("kzalloc(sizeof(buff_t))==NULL");
223 goto err;
224 }
225 b->s = s;
226 b->purb = usb_alloc_urb(packets, GFP_KERNEL);
227 if (!b->purb) {
228 err("usb_alloc_urb == NULL");
229 kfree (b);
230 goto err;
231 }
232
233 b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL);
234 if (!b->purb->transfer_buffer) {
235 kfree (b->purb);
236 kfree (b);
237 err("kmalloc(%d)==NULL", transfer_buffer_length);
238 goto err;
239 }
240
241 b->purb->transfer_buffer_length = transfer_buffer_length;
242 b->purb->number_of_packets = packets;
243 b->purb->complete = dabusb_iso_complete;
244 b->purb->context = b;
245 b->purb->dev = s->usbdev;
246 b->purb->pipe = pipe;
247 b->purb->transfer_flags = URB_ISO_ASAP;
248
249 for (i = 0; i < packets; i++) {
250 b->purb->iso_frame_desc[i].offset = i * pipesize;
251 b->purb->iso_frame_desc[i].length = pipesize;
252 }
253
254 buffers += transfer_buffer_length;
255 list_add_tail (&b->buff_list, &s->free_buff_list);
256 }
257 s->got_mem = buffers;
258
259 return 0;
260
261 err:
262 dabusb_free_buffers (s);
263 return -ENOMEM;
264 }
265 /*-------------------------------------------------------------------*/
266 static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb)
267 {
268 int ret;
269 unsigned int pipe;
270 int actual_length;
271
272 dbg("dabusb_bulk");
273
274 if (!pb->pipe)
275 pipe = usb_rcvbulkpipe (s->usbdev, 2);
276 else
277 pipe = usb_sndbulkpipe (s->usbdev, 2);
278
279 ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100);
280 if(ret<0) {
281 err("dabusb: usb_bulk_msg failed(%d)",ret);
282
283 if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
284 err("set_interface failed");
285 return -EINVAL;
286 }
287
288 }
289
290 if( ret == -EPIPE ) {
291 warn("CLEAR_FEATURE request to remove STALL condition.");
292 if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe)))
293 err("request failed");
294 }
295
296 pb->size = actual_length;
297 return ret;
298 }
299 /* --------------------------------------------------------------------- */
300 static int dabusb_writemem (pdabusb_t s, int pos, unsigned char *data, int len)
301 {
302 int ret;
303 unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL);
304
305 if (!transfer_buffer) {
306 err("dabusb_writemem: kmalloc(%d) failed.", len);
307 return -ENOMEM;
308 }
309
310 memcpy (transfer_buffer, data, len);
311
312 ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300);
313
314 kfree (transfer_buffer);
315 return ret;
316 }
317 /* --------------------------------------------------------------------- */
318 static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit)
319 {
320 dbg("dabusb_8051_reset: %d",reset_bit);
321 return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1);
322 }
323 /* --------------------------------------------------------------------- */
324 static int dabusb_loadmem (pdabusb_t s, const char *fname)
325 {
326 int ret;
327 PINTEL_HEX_RECORD ptr = firmware;
328
329 dbg("Enter dabusb_loadmem (internal)");
330
331 ret = dabusb_8051_reset (s, 1);
332 while (ptr->Type == 0) {
333
334 dbg("dabusb_writemem: %04X %p %d)", ptr->Address, ptr->Data, ptr->Length);
335
336 ret = dabusb_writemem (s, ptr->Address, ptr->Data, ptr->Length);
337 if (ret < 0) {
338 err("dabusb_writemem failed (%d %04X %p %d)", ret, ptr->Address, ptr->Data, ptr->Length);
339 break;
340 }
341 ptr++;
342 }
343 ret = dabusb_8051_reset (s, 0);
344
345 dbg("dabusb_loadmem: exit");
346
347 return ret;
348 }
349 /* --------------------------------------------------------------------- */
350 static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b)
351 {
352 b->size = 4;
353 b->data[0] = 0x2a;
354 b->data[1] = 0;
355 b->data[2] = 0;
356 b->data[3] = 0;
357
358 dbg("dabusb_fpga_clear");
359
360 return dabusb_bulk (s, b);
361 }
362 /* --------------------------------------------------------------------- */
363 static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b)
364 {
365 b->size = 4;
366 b->data[0] = 0x2c;
367 b->data[1] = 0;
368 b->data[2] = 0;
369 b->data[3] = 0;
370
371 dbg("dabusb_fpga_init");
372
373 return dabusb_bulk (s, b);
374 }
375 /* --------------------------------------------------------------------- */
376 static int dabusb_fpga_download (pdabusb_t s, const char *fname)
377 {
378 pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
379 unsigned int blen, n;
380 int ret;
381 unsigned char *buf = bitstream;
382
383 dbg("Enter dabusb_fpga_download (internal)");
384
385 if (!b) {
386 err("kmalloc(sizeof(bulk_transfer_t))==NULL");
387 return -ENOMEM;
388 }
389
390 b->pipe = 1;
391 ret = dabusb_fpga_clear (s, b);
392 mdelay (10);
393 blen = buf[73] + (buf[72] << 8);
394
395 dbg("Bitstream len: %i", blen);
396
397 b->data[0] = 0x2b;
398 b->data[1] = 0;
399 b->data[2] = 0;
400 b->data[3] = 60;
401
402 for (n = 0; n <= blen + 60; n += 60) {
403 // some cclks for startup
404 b->size = 64;
405 memcpy (b->data + 4, buf + 74 + n, 60);
406 ret = dabusb_bulk (s, b);
407 if (ret < 0) {
408 err("dabusb_bulk failed.");
409 break;
410 }
411 mdelay (1);
412 }
413
414 ret = dabusb_fpga_init (s, b);
415 kfree (b);
416
417 dbg("exit dabusb_fpga_download");
418
419 return ret;
420 }
421
422 static int dabusb_stop (pdabusb_t s)
423 {
424 dbg("dabusb_stop");
425
426 s->state = _stopped;
427 dabusb_cancel_queue (s, &s->rec_buff_list);
428
429 dbg("pending_io: %d", s->pending_io.counter);
430
431 s->pending_io.counter = 0;
432 return 0;
433 }
434
435 static int dabusb_startrek (pdabusb_t s)
436 {
437 if (!s->got_mem && s->state != _started) {
438
439 dbg("dabusb_startrek");
440
441 if (dabusb_alloc_buffers (s) < 0)
442 return -ENOMEM;
443 dabusb_stop (s);
444 s->state = _started;
445 s->readptr = 0;
446 }
447
448 if (!list_empty (&s->free_buff_list)) {
449 pbuff_t end;
450 int ret;
451
452 while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) {
453
454 dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list);
455
456 end = list_entry (s->rec_buff_list.prev, buff_t, buff_list);
457
458 ret = usb_submit_urb (end->purb, GFP_KERNEL);
459 if (ret) {
460 err("usb_submit_urb returned:%d", ret);
461 if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
462 err("startrek: dabusb_add_buf_tail failed");
463 break;
464 }
465 else
466 atomic_inc (&s->pending_io);
467 }
468 dbg("pending_io: %d",s->pending_io.counter);
469 }
470
471 return 0;
472 }
473
474 static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos)
475 {
476 pdabusb_t s = (pdabusb_t) file->private_data;
477 unsigned long flags;
478 unsigned ret = 0;
479 int rem;
480 int cnt;
481 pbuff_t b;
482 struct urb *purb = NULL;
483
484 dbg("dabusb_read");
485
486 if (*ppos)
487 return -ESPIPE;
488
489 if (s->remove_pending)
490 return -EIO;
491
492
493 if (!s->usbdev)
494 return -EIO;
495
496 while (count > 0) {
497 dabusb_startrek (s);
498
499 spin_lock_irqsave (&s->lock, flags);
500
501 if (list_empty (&s->rec_buff_list)) {
502
503 spin_unlock_irqrestore(&s->lock, flags);
504
505 err("error: rec_buf_list is empty");
506 goto err;
507 }
508
509 b = list_entry (s->rec_buff_list.next, buff_t, buff_list);
510 purb = b->purb;
511
512 spin_unlock_irqrestore(&s->lock, flags);
513
514 if (purb->status == -EINPROGRESS) {
515 if (file->f_flags & O_NONBLOCK) // return nonblocking
516 {
517 if (!ret)
518 ret = -EAGAIN;
519 goto err;
520 }
521
522 interruptible_sleep_on (&s->wait);
523
524 if (signal_pending (current)) {
525 if (!ret)
526 ret = -ERESTARTSYS;
527 goto err;
528 }
529
530 spin_lock_irqsave (&s->lock, flags);
531
532 if (list_empty (&s->rec_buff_list)) {
533 spin_unlock_irqrestore(&s->lock, flags);
534 err("error: still no buffer available.");
535 goto err;
536 }
537 spin_unlock_irqrestore(&s->lock, flags);
538 s->readptr = 0;
539 }
540 if (s->remove_pending) {
541 ret = -EIO;
542 goto err;
543 }
544
545 rem = purb->actual_length - s->readptr; // set remaining bytes to copy
546
547 if (count >= rem)
548 cnt = rem;
549 else
550 cnt = count;
551
552 dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt);
553
554 if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) {
555 err("read: copy_to_user failed");
556 if (!ret)
557 ret = -EFAULT;
558 goto err;
559 }
560
561 s->readptr += cnt;
562 count -= cnt;
563 buf += cnt;
564 ret += cnt;
565
566 if (s->readptr == purb->actual_length) {
567 // finished, take next buffer
568 if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
569 err("read: dabusb_add_buf_tail failed");
570 s->readptr = 0;
571 }
572 }
573 err: //mutex_unlock(&s->mutex);
574 return ret;
575 }
576
577 static int dabusb_open (struct inode *inode, struct file *file)
578 {
579 int devnum = iminor(inode);
580 pdabusb_t s;
581
582 if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB))
583 return -EIO;
584
585 s = &dabusb[devnum - DABUSB_MINOR];
586
587 dbg("dabusb_open");
588 mutex_lock(&s->mutex);
589
590 while (!s->usbdev || s->opened) {
591 mutex_unlock(&s->mutex);
592
593 if (file->f_flags & O_NONBLOCK) {
594 return -EBUSY;
595 }
596 msleep_interruptible(500);
597
598 if (signal_pending (current)) {
599 return -EAGAIN;
600 }
601 mutex_lock(&s->mutex);
602 }
603 if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
604 mutex_unlock(&s->mutex);
605 err("set_interface failed");
606 return -EINVAL;
607 }
608 s->opened = 1;
609 mutex_unlock(&s->mutex);
610
611 file->f_pos = 0;
612 file->private_data = s;
613
614 return nonseekable_open(inode, file);
615 }
616
617 static int dabusb_release (struct inode *inode, struct file *file)
618 {
619 pdabusb_t s = (pdabusb_t) file->private_data;
620
621 dbg("dabusb_release");
622
623 mutex_lock(&s->mutex);
624 dabusb_stop (s);
625 dabusb_free_buffers (s);
626 mutex_unlock(&s->mutex);
627
628 if (!s->remove_pending) {
629 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0)
630 err("set_interface failed");
631 }
632 else
633 wake_up (&s->remove_ok);
634
635 s->opened = 0;
636 return 0;
637 }
638
639 static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
640 {
641 pdabusb_t s = (pdabusb_t) file->private_data;
642 pbulk_transfer_t pbulk;
643 int ret = 0;
644 int version = DABUSB_VERSION;
645
646 dbg("dabusb_ioctl");
647
648 if (s->remove_pending)
649 return -EIO;
650
651 mutex_lock(&s->mutex);
652
653 if (!s->usbdev) {
654 mutex_unlock(&s->mutex);
655 return -EIO;
656 }
657
658 switch (cmd) {
659
660 case IOCTL_DAB_BULK:
661 pbulk = kmalloc(sizeof (bulk_transfer_t), GFP_KERNEL);
662
663 if (!pbulk) {
664 ret = -ENOMEM;
665 break;
666 }
667
668 if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) {
669 ret = -EFAULT;
670 kfree (pbulk);
671 break;
672 }
673
674 ret=dabusb_bulk (s, pbulk);
675 if(ret==0)
676 if (copy_to_user((void __user *)arg, pbulk,
677 sizeof(bulk_transfer_t)))
678 ret = -EFAULT;
679 kfree (pbulk);
680 break;
681
682 case IOCTL_DAB_OVERRUNS:
683 ret = put_user (s->overruns, (unsigned int __user *) arg);
684 break;
685
686 case IOCTL_DAB_VERSION:
687 ret = put_user (version, (unsigned int __user *) arg);
688 break;
689
690 default:
691 ret = -ENOIOCTLCMD;
692 break;
693 }
694 mutex_unlock(&s->mutex);
695 return ret;
696 }
697
698 static const struct file_operations dabusb_fops =
699 {
700 .owner = THIS_MODULE,
701 .llseek = no_llseek,
702 .read = dabusb_read,
703 .ioctl = dabusb_ioctl,
704 .open = dabusb_open,
705 .release = dabusb_release,
706 };
707
708 static struct usb_class_driver dabusb_class = {
709 .name = "dabusb%d",
710 .fops = &dabusb_fops,
711 .minor_base = DABUSB_MINOR,
712 };
713
714
715 /* --------------------------------------------------------------------- */
716 static int dabusb_probe (struct usb_interface *intf,
717 const struct usb_device_id *id)
718 {
719 struct usb_device *usbdev = interface_to_usbdev(intf);
720 int retval;
721 pdabusb_t s;
722
723 dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d",
724 le16_to_cpu(usbdev->descriptor.idVendor),
725 le16_to_cpu(usbdev->descriptor.idProduct),
726 intf->altsetting->desc.bInterfaceNumber);
727
728 /* We don't handle multiple configurations */
729 if (usbdev->descriptor.bNumConfigurations != 1)
730 return -ENODEV;
731
732 if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF &&
733 le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999)
734 return -ENODEV;
735
736
737
738 s = &dabusb[intf->minor];
739
740 mutex_lock(&s->mutex);
741 s->remove_pending = 0;
742 s->usbdev = usbdev;
743 s->devnum = intf->minor;
744
745 if (usb_reset_configuration (usbdev) < 0) {
746 err("reset_configuration failed");
747 goto reject;
748 }
749 if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) {
750 dabusb_loadmem (s, NULL);
751 goto reject;
752 }
753 else {
754 dabusb_fpga_download (s, NULL);
755
756 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) {
757 err("set_interface failed");
758 goto reject;
759 }
760 }
761 dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber);
762 usb_set_intfdata (intf, s);
763 mutex_unlock(&s->mutex);
764
765 retval = usb_register_dev(intf, &dabusb_class);
766 if (retval) {
767 usb_set_intfdata (intf, NULL);
768 return -ENOMEM;
769 }
770
771 return 0;
772
773 reject:
774 mutex_unlock(&s->mutex);
775 s->usbdev = NULL;
776 return -ENODEV;
777 }
778
779 static void dabusb_disconnect (struct usb_interface *intf)
780 {
781 wait_queue_t __wait;
782 pdabusb_t s = usb_get_intfdata (intf);
783
784 dbg("dabusb_disconnect");
785
786 init_waitqueue_entry(&__wait, current);
787
788 usb_set_intfdata (intf, NULL);
789 if (s) {
790 usb_deregister_dev (intf, &dabusb_class);
791 s->remove_pending = 1;
792 wake_up (&s->wait);
793 add_wait_queue(&s->remove_ok, &__wait);
794 set_current_state(TASK_UNINTERRUPTIBLE);
795 if (s->state == _started)
796 schedule();
797 current->state = TASK_RUNNING;
798 remove_wait_queue(&s->remove_ok, &__wait);
799
800 s->usbdev = NULL;
801 s->overruns = 0;
802 }
803 }
804
805 static struct usb_device_id dabusb_ids [] = {
806 // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */
807 { USB_DEVICE(0x0547, 0x9999) },
808 { } /* Terminating entry */
809 };
810
811 MODULE_DEVICE_TABLE (usb, dabusb_ids);
812
813 static struct usb_driver dabusb_driver = {
814 .name = "dabusb",
815 .probe = dabusb_probe,
816 .disconnect = dabusb_disconnect,
817 .id_table = dabusb_ids,
818 };
819
820 /* --------------------------------------------------------------------- */
821
822 static int __init dabusb_init (void)
823 {
824 int retval;
825 unsigned u;
826
827 /* initialize struct */
828 for (u = 0; u < NRDABUSB; u++) {
829 pdabusb_t s = &dabusb[u];
830 memset (s, 0, sizeof (dabusb_t));
831 mutex_init (&s->mutex);
832 s->usbdev = NULL;
833 s->total_buffer_size = buffers;
834 init_waitqueue_head (&s->wait);
835 init_waitqueue_head (&s->remove_ok);
836 spin_lock_init (&s->lock);
837 INIT_LIST_HEAD (&s->free_buff_list);
838 INIT_LIST_HEAD (&s->rec_buff_list);
839 }
840
841 /* register misc device */
842 retval = usb_register(&dabusb_driver);
843 if (retval)
844 goto out;
845
846 dbg("dabusb_init: driver registered");
847
848 info(DRIVER_VERSION ":" DRIVER_DESC);
849
850 out:
851 return retval;
852 }
853
854 static void __exit dabusb_cleanup (void)
855 {
856 dbg("dabusb_cleanup");
857
858 usb_deregister (&dabusb_driver);
859 }
860
861 /* --------------------------------------------------------------------- */
862
863 MODULE_AUTHOR( DRIVER_AUTHOR );
864 MODULE_DESCRIPTION( DRIVER_DESC );
865 MODULE_LICENSE("GPL");
866
867 module_param(buffers, int, 0);
868 MODULE_PARM_DESC (buffers, "Number of buffers (default=256)");
869
870 module_init (dabusb_init);
871 module_exit (dabusb_cleanup);
872
873 /* --------------------------------------------------------------------- */
WRT350N Kernel Patches