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path: root/drivers/media/video/dabusb.c
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-rw-r--r--drivers/media/video/dabusb.c874
1 files changed, 874 insertions, 0 deletions
diff --git a/drivers/media/video/dabusb.c b/drivers/media/video/dabusb.c
new file mode 100644
index 000000000000..1774ab7a40d2
--- /dev/null
+++ b/drivers/media/video/dabusb.c
@@ -0,0 +1,874 @@
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/smp_lock.h>
41#include <linux/mutex.h>
42
43#include "dabusb.h"
44#include "dabfirmware.h"
45
46/*
47 * Version Information
48 */
49#define DRIVER_VERSION "v1.54"
50#define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de"
51#define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999"
52
53/* --------------------------------------------------------------------- */
54
55#ifdef CONFIG_USB_DYNAMIC_MINORS
56#define NRDABUSB 256
57#else
58#define NRDABUSB 4
59#endif
60
61/*-------------------------------------------------------------------*/
62
63static dabusb_t dabusb[NRDABUSB];
64static int buffers = 256;
65static struct usb_driver dabusb_driver;
66
67/*-------------------------------------------------------------------*/
68
69static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src)
70{
71 unsigned long flags;
72 struct list_head *tmp;
73 int ret = 0;
74
75 spin_lock_irqsave (&s->lock, flags);
76
77 if (list_empty (src)) {
78 // no elements in source buffer
79 ret = -1;
80 goto err;
81 }
82 tmp = src->next;
83 list_move_tail (tmp, dst);
84
85 err: spin_unlock_irqrestore (&s->lock, flags);
86 return ret;
87}
88/*-------------------------------------------------------------------*/
89#ifdef DEBUG
90static void dump_urb (struct urb *urb)
91{
92 dbg("urb :%p", urb);
93 dbg("dev :%p", urb->dev);
94 dbg("pipe :%08X", urb->pipe);
95 dbg("status :%d", urb->status);
96 dbg("transfer_flags :%08X", urb->transfer_flags);
97 dbg("transfer_buffer :%p", urb->transfer_buffer);
98 dbg("transfer_buffer_length:%d", urb->transfer_buffer_length);
99 dbg("actual_length :%d", urb->actual_length);
100 dbg("setup_packet :%p", urb->setup_packet);
101 dbg("start_frame :%d", urb->start_frame);
102 dbg("number_of_packets :%d", urb->number_of_packets);
103 dbg("interval :%d", urb->interval);
104 dbg("error_count :%d", urb->error_count);
105 dbg("context :%p", urb->context);
106 dbg("complete :%p", urb->complete);
107}
108#endif
109/*-------------------------------------------------------------------*/
110static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q)
111{
112 unsigned long flags;
113 pbuff_t b;
114
115 dbg("dabusb_cancel_queue");
116
117 spin_lock_irqsave (&s->lock, flags);
118
119 list_for_each_entry(b, q, buff_list) {
120#ifdef DEBUG
121 dump_urb(b->purb);
122#endif
123 usb_unlink_urb (b->purb);
124 }
125 spin_unlock_irqrestore (&s->lock, flags);
126 return 0;
127}
128/*-------------------------------------------------------------------*/
129static int dabusb_free_queue (struct list_head *q)
130{
131 struct list_head *tmp;
132 struct list_head *p;
133 pbuff_t b;
134
135 dbg("dabusb_free_queue");
136 for (p = q->next; p != q;) {
137 b = list_entry (p, buff_t, buff_list);
138
139#ifdef DEBUG
140 dump_urb(b->purb);
141#endif
142 kfree(b->purb->transfer_buffer);
143 usb_free_urb(b->purb);
144 tmp = p->next;
145 list_del (p);
146 kfree (b);
147 p = tmp;
148 }
149
150 return 0;
151}
152/*-------------------------------------------------------------------*/
153static int dabusb_free_buffers (pdabusb_t s)
154{
155 unsigned long flags;
156 dbg("dabusb_free_buffers");
157
158 spin_lock_irqsave(&s->lock, flags);
159
160 dabusb_free_queue (&s->free_buff_list);
161 dabusb_free_queue (&s->rec_buff_list);
162
163 spin_unlock_irqrestore(&s->lock, flags);
164
165 s->got_mem = 0;
166 return 0;
167}
168/*-------------------------------------------------------------------*/
169static void dabusb_iso_complete (struct urb *purb, struct pt_regs *regs)
170{
171 pbuff_t b = purb->context;
172 pdabusb_t s = b->s;
173 int i;
174 int len;
175 int dst = 0;
176 void *buf = purb->transfer_buffer;
177
178 dbg("dabusb_iso_complete");
179
180 // process if URB was not killed
181 if (purb->status != -ENOENT) {
182 unsigned int pipe = usb_rcvisocpipe (purb->dev, _DABUSB_ISOPIPE);
183 int pipesize = usb_maxpacket (purb->dev, pipe, usb_pipeout (pipe));
184 for (i = 0; i < purb->number_of_packets; i++)
185 if (!purb->iso_frame_desc[i].status) {
186 len = purb->iso_frame_desc[i].actual_length;
187 if (len <= pipesize) {
188 memcpy (buf + dst, buf + purb->iso_frame_desc[i].offset, len);
189 dst += len;
190 }
191 else
192 err("dabusb_iso_complete: invalid len %d", len);
193 }
194 else
195 warn("dabusb_iso_complete: corrupted packet status: %d", purb->iso_frame_desc[i].status);
196 if (dst != purb->actual_length)
197 err("dst!=purb->actual_length:%d!=%d", dst, purb->actual_length);
198 }
199
200 if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) {
201 s->overruns++;
202 err("overrun (%d)", s->overruns);
203 }
204 wake_up (&s->wait);
205}
206/*-------------------------------------------------------------------*/
207static int dabusb_alloc_buffers (pdabusb_t s)
208{
209 int buffers = 0;
210 pbuff_t b;
211 unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE);
212 int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe));
213 int packets = _ISOPIPESIZE / pipesize;
214 int transfer_buffer_length = packets * pipesize;
215 int i;
216
217 dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d",
218 pipesize, packets, transfer_buffer_length);
219
220 while (buffers < (s->total_buffer_size << 10)) {
221 b = (pbuff_t) kzalloc (sizeof (buff_t), GFP_KERNEL);
222 if (!b) {
223 err("kzalloc(sizeof(buff_t))==NULL");
224 goto err;
225 }
226 b->s = s;
227 b->purb = usb_alloc_urb(packets, GFP_KERNEL);
228 if (!b->purb) {
229 err("usb_alloc_urb == NULL");
230 kfree (b);
231 goto err;
232 }
233
234 b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL);
235 if (!b->purb->transfer_buffer) {
236 kfree (b->purb);
237 kfree (b);
238 err("kmalloc(%d)==NULL", transfer_buffer_length);
239 goto err;
240 }
241
242 b->purb->transfer_buffer_length = transfer_buffer_length;
243 b->purb->number_of_packets = packets;
244 b->purb->complete = dabusb_iso_complete;
245 b->purb->context = b;
246 b->purb->dev = s->usbdev;
247 b->purb->pipe = pipe;
248 b->purb->transfer_flags = URB_ISO_ASAP;
249
250 for (i = 0; i < packets; i++) {
251 b->purb->iso_frame_desc[i].offset = i * pipesize;
252 b->purb->iso_frame_desc[i].length = pipesize;
253 }
254
255 buffers += transfer_buffer_length;
256 list_add_tail (&b->buff_list, &s->free_buff_list);
257 }
258 s->got_mem = buffers;
259
260 return 0;
261
262 err:
263 dabusb_free_buffers (s);
264 return -ENOMEM;
265}
266/*-------------------------------------------------------------------*/
267static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb)
268{
269 int ret;
270 unsigned int pipe;
271 int actual_length;
272
273 dbg("dabusb_bulk");
274
275 if (!pb->pipe)
276 pipe = usb_rcvbulkpipe (s->usbdev, 2);
277 else
278 pipe = usb_sndbulkpipe (s->usbdev, 2);
279
280 ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100);
281 if(ret<0) {
282 err("dabusb: usb_bulk_msg failed(%d)",ret);
283
284 if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
285 err("set_interface failed");
286 return -EINVAL;
287 }
288
289 }
290
291 if( ret == -EPIPE ) {
292 warn("CLEAR_FEATURE request to remove STALL condition.");
293 if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe)))
294 err("request failed");
295 }
296
297 pb->size = actual_length;
298 return ret;
299}
300/* --------------------------------------------------------------------- */
301static int dabusb_writemem (pdabusb_t s, int pos, unsigned char *data, int len)
302{
303 int ret;
304 unsigned char *transfer_buffer = kmalloc (len, GFP_KERNEL);
305
306 if (!transfer_buffer) {
307 err("dabusb_writemem: kmalloc(%d) failed.", len);
308 return -ENOMEM;
309 }
310
311 memcpy (transfer_buffer, data, len);
312
313 ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300);
314
315 kfree (transfer_buffer);
316 return ret;
317}
318/* --------------------------------------------------------------------- */
319static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit)
320{
321 dbg("dabusb_8051_reset: %d",reset_bit);
322 return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1);
323}
324/* --------------------------------------------------------------------- */
325static int dabusb_loadmem (pdabusb_t s, const char *fname)
326{
327 int ret;
328 PINTEL_HEX_RECORD ptr = firmware;
329
330 dbg("Enter dabusb_loadmem (internal)");
331
332 ret = dabusb_8051_reset (s, 1);
333 while (ptr->Type == 0) {
334
335 dbg("dabusb_writemem: %04X %p %d)", ptr->Address, ptr->Data, ptr->Length);
336
337 ret = dabusb_writemem (s, ptr->Address, ptr->Data, ptr->Length);
338 if (ret < 0) {
339 err("dabusb_writemem failed (%d %04X %p %d)", ret, ptr->Address, ptr->Data, ptr->Length);
340 break;
341 }
342 ptr++;
343 }
344 ret = dabusb_8051_reset (s, 0);
345
346 dbg("dabusb_loadmem: exit");
347
348 return ret;
349}
350/* --------------------------------------------------------------------- */
351static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b)
352{
353 b->size = 4;
354 b->data[0] = 0x2a;
355 b->data[1] = 0;
356 b->data[2] = 0;
357 b->data[3] = 0;
358
359 dbg("dabusb_fpga_clear");
360
361 return dabusb_bulk (s, b);
362}
363/* --------------------------------------------------------------------- */
364static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b)
365{
366 b->size = 4;
367 b->data[0] = 0x2c;
368 b->data[1] = 0;
369 b->data[2] = 0;
370 b->data[3] = 0;
371
372 dbg("dabusb_fpga_init");
373
374 return dabusb_bulk (s, b);
375}
376/* --------------------------------------------------------------------- */
377static int dabusb_fpga_download (pdabusb_t s, const char *fname)
378{
379 pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
380 unsigned int blen, n;
381 int ret;
382 unsigned char *buf = bitstream;
383
384 dbg("Enter dabusb_fpga_download (internal)");
385
386 if (!b) {
387 err("kmalloc(sizeof(bulk_transfer_t))==NULL");
388 return -ENOMEM;
389 }
390
391 b->pipe = 1;
392 ret = dabusb_fpga_clear (s, b);
393 mdelay (10);
394 blen = buf[73] + (buf[72] << 8);
395
396 dbg("Bitstream len: %i", blen);
397
398 b->data[0] = 0x2b;
399 b->data[1] = 0;
400 b->data[2] = 0;
401 b->data[3] = 60;
402
403 for (n = 0; n <= blen + 60; n += 60) {
404 // some cclks for startup
405 b->size = 64;
406 memcpy (b->data + 4, buf + 74 + n, 60);
407 ret = dabusb_bulk (s, b);
408 if (ret < 0) {
409 err("dabusb_bulk failed.");
410 break;
411 }
412 mdelay (1);
413 }
414
415 ret = dabusb_fpga_init (s, b);
416 kfree (b);
417
418 dbg("exit dabusb_fpga_download");
419
420 return ret;
421}
422
423static int dabusb_stop (pdabusb_t s)
424{
425 dbg("dabusb_stop");
426
427 s->state = _stopped;
428 dabusb_cancel_queue (s, &s->rec_buff_list);
429
430 dbg("pending_io: %d", s->pending_io.counter);
431
432 s->pending_io.counter = 0;
433 return 0;
434}
435
436static int dabusb_startrek (pdabusb_t s)
437{
438 if (!s->got_mem && s->state != _started) {
439
440 dbg("dabusb_startrek");
441
442 if (dabusb_alloc_buffers (s) < 0)
443 return -ENOMEM;
444 dabusb_stop (s);
445 s->state = _started;
446 s->readptr = 0;
447 }
448
449 if (!list_empty (&s->free_buff_list)) {
450 pbuff_t end;
451 int ret;
452
453 while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) {
454
455 dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list);
456
457 end = list_entry (s->rec_buff_list.prev, buff_t, buff_list);
458
459 ret = usb_submit_urb (end->purb, GFP_KERNEL);
460 if (ret) {
461 err("usb_submit_urb returned:%d", ret);
462 if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
463 err("startrek: dabusb_add_buf_tail failed");
464 break;
465 }
466 else
467 atomic_inc (&s->pending_io);
468 }
469 dbg("pending_io: %d",s->pending_io.counter);
470 }
471
472 return 0;
473}
474
475static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos)
476{
477 pdabusb_t s = (pdabusb_t) file->private_data;
478 unsigned long flags;
479 unsigned ret = 0;
480 int rem;
481 int cnt;
482 pbuff_t b;
483 struct urb *purb = NULL;
484
485 dbg("dabusb_read");
486
487 if (*ppos)
488 return -ESPIPE;
489
490 if (s->remove_pending)
491 return -EIO;
492
493
494 if (!s->usbdev)
495 return -EIO;
496
497 while (count > 0) {
498 dabusb_startrek (s);
499
500 spin_lock_irqsave (&s->lock, flags);
501
502 if (list_empty (&s->rec_buff_list)) {
503
504 spin_unlock_irqrestore(&s->lock, flags);
505
506 err("error: rec_buf_list is empty");
507 goto err;
508 }
509
510 b = list_entry (s->rec_buff_list.next, buff_t, buff_list);
511 purb = b->purb;
512
513 spin_unlock_irqrestore(&s->lock, flags);
514
515 if (purb->status == -EINPROGRESS) {
516 if (file->f_flags & O_NONBLOCK) // return nonblocking
517 {
518 if (!ret)
519 ret = -EAGAIN;
520 goto err;
521 }
522
523 interruptible_sleep_on (&s->wait);
524
525 if (signal_pending (current)) {
526 if (!ret)
527 ret = -ERESTARTSYS;
528 goto err;
529 }
530
531 spin_lock_irqsave (&s->lock, flags);
532
533 if (list_empty (&s->rec_buff_list)) {
534 spin_unlock_irqrestore(&s->lock, flags);
535 err("error: still no buffer available.");
536 goto err;
537 }
538 spin_unlock_irqrestore(&s->lock, flags);
539 s->readptr = 0;
540 }
541 if (s->remove_pending) {
542 ret = -EIO;
543 goto err;
544 }
545
546 rem = purb->actual_length - s->readptr; // set remaining bytes to copy
547
548 if (count >= rem)
549 cnt = rem;
550 else
551 cnt = count;
552
553 dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt);
554
555 if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) {
556 err("read: copy_to_user failed");
557 if (!ret)
558 ret = -EFAULT;
559 goto err;
560 }
561
562 s->readptr += cnt;
563 count -= cnt;
564 buf += cnt;
565 ret += cnt;
566
567 if (s->readptr == purb->actual_length) {
568 // finished, take next buffer
569 if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
570 err("read: dabusb_add_buf_tail failed");
571 s->readptr = 0;
572 }
573 }
574 err: //mutex_unlock(&s->mutex);
575 return ret;
576}
577
578static int dabusb_open (struct inode *inode, struct file *file)
579{
580 int devnum = iminor(inode);
581 pdabusb_t s;
582
583 if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB))
584 return -EIO;
585
586 s = &dabusb[devnum - DABUSB_MINOR];
587
588 dbg("dabusb_open");
589 mutex_lock(&s->mutex);
590
591 while (!s->usbdev || s->opened) {
592 mutex_unlock(&s->mutex);
593
594 if (file->f_flags & O_NONBLOCK) {
595 return -EBUSY;
596 }
597 msleep_interruptible(500);
598
599 if (signal_pending (current)) {
600 return -EAGAIN;
601 }
602 mutex_lock(&s->mutex);
603 }
604 if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
605 mutex_unlock(&s->mutex);
606 err("set_interface failed");
607 return -EINVAL;
608 }
609 s->opened = 1;
610 mutex_unlock(&s->mutex);
611
612 file->f_pos = 0;
613 file->private_data = s;
614
615 return nonseekable_open(inode, file);
616}
617
618static int dabusb_release (struct inode *inode, struct file *file)
619{
620 pdabusb_t s = (pdabusb_t) file->private_data;
621
622 dbg("dabusb_release");
623
624 mutex_lock(&s->mutex);
625 dabusb_stop (s);
626 dabusb_free_buffers (s);
627 mutex_unlock(&s->mutex);
628
629 if (!s->remove_pending) {
630 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0)
631 err("set_interface failed");
632 }
633 else
634 wake_up (&s->remove_ok);
635
636 s->opened = 0;
637 return 0;
638}
639
640static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
641{
642 pdabusb_t s = (pdabusb_t) file->private_data;
643 pbulk_transfer_t pbulk;
644 int ret = 0;
645 int version = DABUSB_VERSION;
646
647 dbg("dabusb_ioctl");
648
649 if (s->remove_pending)
650 return -EIO;
651
652 mutex_lock(&s->mutex);
653
654 if (!s->usbdev) {
655 mutex_unlock(&s->mutex);
656 return -EIO;
657 }
658
659 switch (cmd) {
660
661 case IOCTL_DAB_BULK:
662 pbulk = (pbulk_transfer_t) kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
663
664 if (!pbulk) {
665 ret = -ENOMEM;
666 break;
667 }
668
669 if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) {
670 ret = -EFAULT;
671 kfree (pbulk);
672 break;
673 }
674
675 ret=dabusb_bulk (s, pbulk);
676 if(ret==0)
677 if (copy_to_user((void __user *)arg, pbulk,
678 sizeof(bulk_transfer_t)))
679 ret = -EFAULT;
680 kfree (pbulk);
681 break;
682
683 case IOCTL_DAB_OVERRUNS:
684 ret = put_user (s->overruns, (unsigned int __user *) arg);
685 break;
686
687 case IOCTL_DAB_VERSION:
688 ret = put_user (version, (unsigned int __user *) arg);
689 break;
690
691 default:
692 ret = -ENOIOCTLCMD;
693 break;
694 }
695 mutex_unlock(&s->mutex);
696 return ret;
697}
698
699static struct file_operations dabusb_fops =
700{
701 .owner = THIS_MODULE,
702 .llseek = no_llseek,
703 .read = dabusb_read,
704 .ioctl = dabusb_ioctl,
705 .open = dabusb_open,
706 .release = dabusb_release,
707};
708
709static struct usb_class_driver dabusb_class = {
710 .name = "dabusb%d",
711 .fops = &dabusb_fops,
712 .minor_base = DABUSB_MINOR,
713};
714
715
716/* --------------------------------------------------------------------- */
717static int dabusb_probe (struct usb_interface *intf,
718 const struct usb_device_id *id)
719{
720 struct usb_device *usbdev = interface_to_usbdev(intf);
721 int retval;
722 pdabusb_t s;
723
724 dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d",
725 le16_to_cpu(usbdev->descriptor.idVendor),
726 le16_to_cpu(usbdev->descriptor.idProduct),
727 intf->altsetting->desc.bInterfaceNumber);
728
729 /* We don't handle multiple configurations */
730 if (usbdev->descriptor.bNumConfigurations != 1)
731 return -ENODEV;
732
733 if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF &&
734 le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999)
735 return -ENODEV;
736
737
738
739 s = &dabusb[intf->minor];
740
741 mutex_lock(&s->mutex);
742 s->remove_pending = 0;
743 s->usbdev = usbdev;
744 s->devnum = intf->minor;
745
746 if (usb_reset_configuration (usbdev) < 0) {
747 err("reset_configuration failed");
748 goto reject;
749 }
750 if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) {
751 dabusb_loadmem (s, NULL);
752 goto reject;
753 }
754 else {
755 dabusb_fpga_download (s, NULL);
756
757 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) {
758 err("set_interface failed");
759 goto reject;
760 }
761 }
762 dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber);
763 usb_set_intfdata (intf, s);
764 mutex_unlock(&s->mutex);
765
766 retval = usb_register_dev(intf, &dabusb_class);
767 if (retval) {
768 usb_set_intfdata (intf, NULL);
769 return -ENOMEM;
770 }
771
772 return 0;
773
774 reject:
775 mutex_unlock(&s->mutex);
776 s->usbdev = NULL;
777 return -ENODEV;
778}
779
780static void dabusb_disconnect (struct usb_interface *intf)
781{
782 wait_queue_t __wait;
783 pdabusb_t s = usb_get_intfdata (intf);
784
785 dbg("dabusb_disconnect");
786
787 init_waitqueue_entry(&__wait, current);
788
789 usb_set_intfdata (intf, NULL);
790 if (s) {
791 usb_deregister_dev (intf, &dabusb_class);
792 s->remove_pending = 1;
793 wake_up (&s->wait);
794 add_wait_queue(&s->remove_ok, &__wait);
795 set_current_state(TASK_UNINTERRUPTIBLE);
796 if (s->state == _started)
797 schedule();
798 current->state = TASK_RUNNING;
799 remove_wait_queue(&s->remove_ok, &__wait);
800
801 s->usbdev = NULL;
802 s->overruns = 0;
803 }
804}
805
806static struct usb_device_id dabusb_ids [] = {
807 // { USB_DEVICE(0x0547, 0x2131) }, /* An2131 chip, no boot ROM */
808 { USB_DEVICE(0x0547, 0x9999) },
809 { } /* Terminating entry */
810};
811
812MODULE_DEVICE_TABLE (usb, dabusb_ids);
813
814static struct usb_driver dabusb_driver = {
815 .name = "dabusb",
816 .probe = dabusb_probe,
817 .disconnect = dabusb_disconnect,
818 .id_table = dabusb_ids,
819};
820
821/* --------------------------------------------------------------------- */
822
823static int __init dabusb_init (void)
824{
825 int retval;
826 unsigned u;
827
828 /* initialize struct */
829 for (u = 0; u < NRDABUSB; u++) {
830 pdabusb_t s = &dabusb[u];
831 memset (s, 0, sizeof (dabusb_t));
832 mutex_init (&s->mutex);
833 s->usbdev = NULL;
834 s->total_buffer_size = buffers;
835 init_waitqueue_head (&s->wait);
836 init_waitqueue_head (&s->remove_ok);
837 spin_lock_init (&s->lock);
838 INIT_LIST_HEAD (&s->free_buff_list);
839 INIT_LIST_HEAD (&s->rec_buff_list);
840 }
841
842 /* register misc device */
843 retval = usb_register(&dabusb_driver);
844 if (retval)
845 goto out;
846
847 dbg("dabusb_init: driver registered");
848
849 info(DRIVER_VERSION ":" DRIVER_DESC);
850
851out:
852 return retval;
853}
854
855static void __exit dabusb_cleanup (void)
856{
857 dbg("dabusb_cleanup");
858
859 usb_deregister (&dabusb_driver);
860}
861
862/* --------------------------------------------------------------------- */
863
864MODULE_AUTHOR( DRIVER_AUTHOR );
865MODULE_DESCRIPTION( DRIVER_DESC );
866MODULE_LICENSE("GPL");
867
868module_param(buffers, int, 0);
869MODULE_PARM_DESC (buffers, "Number of buffers (default=256)");
870
871module_init (dabusb_init);
872module_exit (dabusb_cleanup);
873
874/* --------------------------------------------------------------------- */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 09:48:41 -0500