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V4L/DVB (7556): em28xx: fix locking on vidioc_s_fmt_cap
[linux-2.6/verdex.git] / drivers / media / video / em28xx / em28xx-video.c
blobd3485f500c5e1785616c2302f4bf700c0b5dadbd
1 /*
2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
3
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
8
9 Some parts based on SN9C10x PC Camera Controllers GPL driver made
10 by Luca Risolia <luca.risolia@studio.unibo.it>
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/bitmap.h>
32 #include <linux/usb.h>
33 #include <linux/i2c.h>
34 #include <linux/version.h>
35 #include <linux/mm.h>
36 #include <linux/mutex.h>
37
38 #include "em28xx.h"
39 #include <media/v4l2-common.h>
40 #include <media/msp3400.h>
41 #include <media/tuner.h>
42
43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
44 "Markus Rechberger <mrechberger@gmail.com>, " \
45 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
46 "Sascha Sommer <saschasommer@freenet.de>"
47
48 #define DRIVER_NAME "em28xx"
49 #define DRIVER_DESC "Empia em28xx based USB video device driver"
50 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
51
52 #define em28xx_videodbg(fmt, arg...) do {\
53 if (video_debug) \
54 printk(KERN_INFO "%s %s :"fmt, \
55 dev->name, __func__ , ##arg); } while (0)
56
57 static unsigned int isoc_debug;
58 module_param(isoc_debug, int, 0644);
59 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
60
61 #define em28xx_isocdbg(fmt, arg...) do {\
62 if (isoc_debug) \
63 printk(KERN_INFO "%s %s :"fmt, \
64 dev->name, __func__ , ##arg); } while (0)
65
66 /* Limits minimum and default number of buffers */
67 #define EM28XX_MIN_BUF 4
68 #define EM28XX_DEF_BUF 8
69
70 MODULE_AUTHOR(DRIVER_AUTHOR);
71 MODULE_DESCRIPTION(DRIVER_DESC);
72 MODULE_LICENSE("GPL");
73
74 static LIST_HEAD(em28xx_devlist);
75
76 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
77 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
78 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
79 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
80
81 module_param_array(card, int, NULL, 0444);
82 module_param_array(video_nr, int, NULL, 0444);
83 module_param_array(vbi_nr, int, NULL, 0444);
84 module_param_array(radio_nr, int, NULL, 0444);
85 MODULE_PARM_DESC(card, "card type");
86 MODULE_PARM_DESC(video_nr, "video device numbers");
87 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
88 MODULE_PARM_DESC(radio_nr, "radio device numbers");
89
90 static unsigned int video_debug;
91 module_param(video_debug,int,0644);
92 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
93
94 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
95 static unsigned long em28xx_devused;
96
97 /* supported controls */
98 /* Common to all boards */
99 static struct v4l2_queryctrl em28xx_qctrl[] = {
100 {
101 .id = V4L2_CID_AUDIO_VOLUME,
102 .type = V4L2_CTRL_TYPE_INTEGER,
103 .name = "Volume",
104 .minimum = 0x0,
105 .maximum = 0x1f,
106 .step = 0x1,
107 .default_value = 0x1f,
108 .flags = 0,
109 },{
110 .id = V4L2_CID_AUDIO_MUTE,
111 .type = V4L2_CTRL_TYPE_BOOLEAN,
112 .name = "Mute",
113 .minimum = 0,
114 .maximum = 1,
115 .step = 1,
116 .default_value = 1,
117 .flags = 0,
118 }
119 };
120
121 static struct usb_driver em28xx_usb_driver;
122
123 /* ------------------------------------------------------------------
124 DMA and thread functions
125 ------------------------------------------------------------------*/
126
127 /*
128 * Announces that a buffer were filled and request the next
129 */
130 static inline void buffer_filled(struct em28xx *dev,
131 struct em28xx_dmaqueue *dma_q,
132 struct em28xx_buffer *buf)
133 {
134 /* Advice that buffer was filled */
135 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
136 buf->vb.state = VIDEOBUF_DONE;
137 buf->vb.field_count++;
138 do_gettimeofday(&buf->vb.ts);
139
140 list_del(&buf->vb.queue);
141 wake_up(&buf->vb.done);
142 }
143
144 /*
145 * Identify the buffer header type and properly handles
146 */
147 static void em28xx_copy_video(struct em28xx *dev,
148 struct em28xx_dmaqueue *dma_q,
149 struct em28xx_buffer *buf,
150 unsigned char *p,
151 unsigned char *outp, unsigned long len)
152 {
153 void *fieldstart, *startwrite, *startread;
154 int linesdone, currlinedone, offset, lencopy, remain;
155
156 if (dev->frame_size != buf->vb.size) {
157 em28xx_errdev("size %i and buf.length %lu are different!\n",
158 dev->frame_size, buf->vb.size);
159 return;
160 }
161
162 if (dma_q->pos + len > buf->vb.size)
163 len = buf->vb.size - dma_q->pos;
164
165 if (p[0] != 0x88 && p[0] != 0x22) {
166 em28xx_isocdbg("frame is not complete\n");
167 len += 4;
168 } else
169 p += 4;
170
171 startread = p;
172 remain = len;
173
174 /* Interlaces frame */
175 if (buf->top_field)
176 fieldstart = outp;
177 else
178 fieldstart = outp + dev->bytesperline;
179
180 linesdone = dma_q->pos / dev->bytesperline;
181 currlinedone = dma_q->pos % dev->bytesperline;
182 offset = linesdone * dev->bytesperline * 2 + currlinedone;
183 startwrite = fieldstart + offset;
184 lencopy = dev->bytesperline - currlinedone;
185 lencopy = lencopy > remain ? remain : lencopy;
186
187 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
188 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
189 ((char *)startwrite + lencopy) -
190 ((char *)outp + buf->vb.size));
191 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
192 }
193 if (lencopy <= 0)
194 return;
195 memcpy(startwrite, startread, lencopy);
196
197 remain -= lencopy;
198
199 while (remain > 0) {
200 startwrite += lencopy + dev->bytesperline;
201 startread += lencopy;
202 if (dev->bytesperline > remain)
203 lencopy = remain;
204 else
205 lencopy = dev->bytesperline;
206
207 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
208 em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
209 ((char *)startwrite + lencopy) -
210 ((char *)outp + buf->vb.size));
211 lencopy = remain = (char *)outp + buf->vb.size -
212 (char *)startwrite;
213 }
214 if (lencopy <= 0)
215 break;
216
217 memcpy(startwrite, startread, lencopy);
218
219 remain -= lencopy;
220 }
221
222 dma_q->pos += len;
223 }
224
225 static inline void print_err_status(struct em28xx *dev,
226 int packet, int status)
227 {
228 char *errmsg = "Unknown";
229
230 switch (status) {
231 case -ENOENT:
232 errmsg = "unlinked synchronuously";
233 break;
234 case -ECONNRESET:
235 errmsg = "unlinked asynchronuously";
236 break;
237 case -ENOSR:
238 errmsg = "Buffer error (overrun)";
239 break;
240 case -EPIPE:
241 errmsg = "Stalled (device not responding)";
242 break;
243 case -EOVERFLOW:
244 errmsg = "Babble (bad cable?)";
245 break;
246 case -EPROTO:
247 errmsg = "Bit-stuff error (bad cable?)";
248 break;
249 case -EILSEQ:
250 errmsg = "CRC/Timeout (could be anything)";
251 break;
252 case -ETIME:
253 errmsg = "Device does not respond";
254 break;
255 }
256 if (packet < 0) {
257 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
258 } else {
259 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
260 packet, status, errmsg);
261 }
262 }
263
264 /*
265 * video-buf generic routine to get the next available buffer
266 */
267 static inline int get_next_buf(struct em28xx_dmaqueue *dma_q,
268 struct em28xx_buffer **buf)
269 {
270 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
271
272 if (list_empty(&dma_q->active)) {
273 em28xx_isocdbg("No active queue to serve\n");
274 return 0;
275 }
276
277 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
278
279 return 1;
280 }
281
282 /*
283 * Controls the isoc copy of each urb packet
284 */
285 static inline int em28xx_isoc_copy(struct urb *urb)
286 {
287 struct em28xx_buffer *buf;
288 struct em28xx_dmaqueue *dma_q = urb->context;
289 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
290 unsigned char *outp;
291 int i, len = 0, rc = 1;
292 unsigned char *p;
293
294 if (!dev)
295 return 0;
296
297 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
298 return 0;
299
300 if (urb->status < 0) {
301 print_err_status(dev, -1, urb->status);
302 if (urb->status == -ENOENT)
303 return 0;
304 }
305
306 buf = dev->isoc_ctl.buf;
307
308 if (!buf) {
309 rc = get_next_buf(dma_q, &buf);
310 if (rc <= 0)
311 return rc;
312 }
313
314 outp = videobuf_to_vmalloc(&buf->vb);
315
316 for (i = 0; i < urb->number_of_packets; i++) {
317 int status = urb->iso_frame_desc[i].status;
318
319 if (status < 0) {
320 print_err_status(dev, i, status);
321 if (urb->iso_frame_desc[i].status != -EPROTO)
322 continue;
323 }
324
325 len = urb->iso_frame_desc[i].actual_length - 4;
326
327 if (urb->iso_frame_desc[i].actual_length <= 0) {
328 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
329 continue;
330 }
331 if (urb->iso_frame_desc[i].actual_length >
332 dev->max_pkt_size) {
333 em28xx_isocdbg("packet bigger than packet size");
334 continue;
335 }
336
337 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
338
339 /* FIXME: incomplete buffer checks where removed to make
340 logic simpler. Impacts of those changes should be evaluated
341 */
342 if (p[0] == 0x22 && p[1] == 0x5a) {
343 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
344 len, (p[2] & 1)? "odd" : "even");
345
346 if (p[2] & 1)
347 buf->top_field = 0;
348 else {
349 if (buf->receiving) {
350 buffer_filled(dev, dma_q, buf);
351 rc = get_next_buf(dma_q, &buf);
352 if (rc <= 0)
353 return rc;
354
355 outp = videobuf_to_vmalloc(&buf->vb);
356 }
357
358 buf->top_field = 1;
359 }
360 buf->receiving = 1;
361 dma_q->pos = 0;
362 } else if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
363 em28xx_isocdbg("VBI HEADER!!!\n");
364 }
365
366 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
367
368 /* FIXME: Should add vbi copy */
369 }
370 return rc;
371 }
372
373 /* ------------------------------------------------------------------
374 URB control
375 ------------------------------------------------------------------*/
376
377 /*
378 * IRQ callback, called by URB callback
379 */
380 static void em28xx_irq_callback(struct urb *urb)
381 {
382 struct em28xx_dmaqueue *dma_q = urb->context;
383 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
384 int rc, i;
385 unsigned long flags;
386
387 spin_lock_irqsave(&dev->slock, flags);
388
389 /* Copy data from URB */
390 rc = em28xx_isoc_copy(urb);
391
392 /* Reset urb buffers */
393 for (i = 0; i < urb->number_of_packets; i++) {
394 urb->iso_frame_desc[i].status = 0;
395 urb->iso_frame_desc[i].actual_length = 0;
396 }
397 urb->status = 0;
398
399 urb->status = usb_submit_urb(urb, GFP_ATOMIC);
400 if (urb->status) {
401 em28xx_err("urb resubmit failed (error=%i)\n",
402 urb->status);
403 }
404
405 spin_unlock_irqrestore(&dev->slock, flags);
406 }
407
408 /*
409 * Stop and Deallocate URBs
410 */
411 static void em28xx_uninit_isoc(struct em28xx *dev)
412 {
413 struct urb *urb;
414 int i;
415
416 em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
417
418 dev->isoc_ctl.nfields = -1;
419 dev->isoc_ctl.buf = NULL;
420 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
421 urb = dev->isoc_ctl.urb[i];
422 if (urb) {
423 usb_kill_urb(urb);
424 usb_unlink_urb(urb);
425 if (dev->isoc_ctl.transfer_buffer[i]) {
426 usb_buffer_free(dev->udev,
427 urb->transfer_buffer_length,
428 dev->isoc_ctl.transfer_buffer[i],
429 urb->transfer_dma);
430 }
431 usb_free_urb(urb);
432 dev->isoc_ctl.urb[i] = NULL;
433 }
434 dev->isoc_ctl.transfer_buffer[i] = NULL;
435 }
436
437 kfree(dev->isoc_ctl.urb);
438 kfree(dev->isoc_ctl.transfer_buffer);
439 dev->isoc_ctl.urb = NULL;
440 dev->isoc_ctl.transfer_buffer = NULL;
441
442 dev->isoc_ctl.num_bufs = 0;
443
444 em28xx_capture_start(dev, 0);
445 }
446
447 /*
448 * Allocate URBs and start IRQ
449 */
450 static int em28xx_prepare_isoc(struct em28xx *dev, int max_packets,
451 int num_bufs)
452 {
453 struct em28xx_dmaqueue *dma_q = &dev->vidq;
454 int i;
455 int sb_size, pipe;
456 struct urb *urb;
457 int j, k;
458
459 em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
460
461 /* De-allocates all pending stuff */
462 em28xx_uninit_isoc(dev);
463
464 dev->isoc_ctl.num_bufs = num_bufs;
465
466 dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
467 if (!dev->isoc_ctl.urb) {
468 em28xx_errdev("cannot alloc memory for usb buffers\n");
469 return -ENOMEM;
470 }
471
472 dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
473 GFP_KERNEL);
474 if (!dev->isoc_ctl.urb) {
475 em28xx_errdev("cannot allocate memory for usbtransfer\n");
476 kfree(dev->isoc_ctl.urb);
477 return -ENOMEM;
478 }
479
480 dev->isoc_ctl.max_pkt_size = dev->max_pkt_size;
481
482 sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
483
484 /* allocate urbs and transfer buffers */
485 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
486 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
487 if (!urb) {
488 em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
489 em28xx_uninit_isoc(dev);
490 return -ENOMEM;
491 }
492 dev->isoc_ctl.urb[i] = urb;
493
494 dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev,
495 sb_size, GFP_KERNEL, &urb->transfer_dma);
496 if (!dev->isoc_ctl.transfer_buffer[i]) {
497 em28xx_err("unable to allocate %i bytes for transfer"
498 " buffer %i%s\n",
499 sb_size, i,
500 in_interrupt()?" while in int":"");
501 em28xx_uninit_isoc(dev);
502 return -ENOMEM;
503 }
504 memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
505
506 /* FIXME: this is a hack - should be
507 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
508 should also be using 'desc.bInterval'
509 */
510 pipe = usb_rcvisocpipe(dev->udev, 0x82);
511 usb_fill_int_urb(urb, dev->udev, pipe,
512 dev->isoc_ctl.transfer_buffer[i], sb_size,
513 em28xx_irq_callback, dma_q, 1);
514
515 urb->number_of_packets = max_packets;
516 urb->transfer_flags = URB_ISO_ASAP;
517
518 k = 0;
519 for (j = 0; j < max_packets; j++) {
520 urb->iso_frame_desc[j].offset = k;
521 urb->iso_frame_desc[j].length =
522 dev->isoc_ctl.max_pkt_size;
523 k += dev->isoc_ctl.max_pkt_size;
524 }
525 }
526
527 return 0;
528 }
529
530 static int em28xx_start_thread(struct em28xx_dmaqueue *dma_q)
531 {
532 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
533 int i, rc = 0;
534
535 em28xx_videodbg("Called em28xx_start_thread\n");
536
537 init_waitqueue_head(&dma_q->wq);
538
539 em28xx_capture_start(dev, 1);
540
541 /* submit urbs and enables IRQ */
542 for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
543 rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
544 if (rc) {
545 em28xx_err("submit of urb %i failed (error=%i)\n", i,
546 rc);
547 em28xx_uninit_isoc(dev);
548 return rc;
549 }
550 }
551
552 if (rc < 0)
553 return rc;
554
555 return 0;
556 }
557
558 /* ------------------------------------------------------------------
559 Videobuf operations
560 ------------------------------------------------------------------*/
561
562 static int
563 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
564 {
565 struct em28xx_fh *fh = vq->priv_data;
566
567 *size = 16 * fh->dev->width * fh->dev->height >> 3;
568 if (0 == *count)
569 *count = EM28XX_DEF_BUF;
570
571 if (*count < EM28XX_MIN_BUF)
572 *count = EM28XX_MIN_BUF;
573
574 return 0;
575 }
576
577 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
578 {
579 if (in_interrupt())
580 BUG();
581
582 videobuf_waiton(&buf->vb, 0, 0);
583 videobuf_vmalloc_free(&buf->vb);
584 buf->vb.state = VIDEOBUF_NEEDS_INIT;
585 }
586
587 static int
588 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
589 enum v4l2_field field)
590 {
591 struct em28xx_fh *fh = vq->priv_data;
592 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
593 struct em28xx *dev = fh->dev;
594 struct em28xx_dmaqueue *vidq = &dev->vidq;
595 int rc = 0, urb_init = 0;
596
597 /* BUG_ON(NULL == fh->fmt); */
598
599 /* FIXME: It assumes depth = 16 */
600 /* The only currently supported format is 16 bits/pixel */
601 buf->vb.size = 16 * dev->width * dev->height >> 3;
602
603 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
604 return -EINVAL;
605
606 buf->fmt = fh->fmt;
607 buf->vb.width = dev->width;
608 buf->vb.height = dev->height;
609 buf->vb.field = field;
610
611 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
612 rc = videobuf_iolock(vq, &buf->vb, NULL);
613 if (rc < 0)
614 goto fail;
615 }
616
617 if (!dev->isoc_ctl.num_bufs)
618 urb_init = 1;
619
620 if (urb_init) {
621 rc = em28xx_prepare_isoc(dev, EM28XX_NUM_PACKETS,
622 EM28XX_NUM_BUFS);
623 if (rc < 0)
624 goto fail;
625
626 rc = em28xx_start_thread(vidq);
627 if (rc < 0)
628 goto fail;
629 }
630
631 buf->vb.state = VIDEOBUF_PREPARED;
632 return 0;
633
634 fail:
635 free_buffer(vq, buf);
636 return rc;
637 }
638
639 static void
640 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
641 {
642 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
643 struct em28xx_fh *fh = vq->priv_data;
644 struct em28xx *dev = fh->dev;
645 struct em28xx_dmaqueue *vidq = &dev->vidq;
646
647 buf->vb.state = VIDEOBUF_QUEUED;
648 list_add_tail(&buf->vb.queue, &vidq->active);
649
650 }
651
652 static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
653 {
654 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
655 struct em28xx_fh *fh = vq->priv_data;
656 struct em28xx *dev = (struct em28xx *)fh->dev;
657
658 em28xx_isocdbg("em28xx: called buffer_release\n");
659
660 free_buffer(vq, buf);
661 }
662
663 static struct videobuf_queue_ops em28xx_video_qops = {
664 .buf_setup = buffer_setup,
665 .buf_prepare = buffer_prepare,
666 .buf_queue = buffer_queue,
667 .buf_release = buffer_release,
668 };
669
670 /********************* v4l2 interface ******************************************/
671
672 /*
673 * em28xx_config()
674 * inits registers with sane defaults
675 */
676 static int em28xx_config(struct em28xx *dev)
677 {
678
679 /* Sets I2C speed to 100 KHz */
680 if (!dev->is_em2800)
681 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
682
683 /* enable vbi capturing */
684
685 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
686 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
687 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
688
689 dev->mute = 1; /* maybe not the right place... */
690 dev->volume = 0x1f;
691
692 em28xx_outfmt_set_yuv422(dev);
693 em28xx_colorlevels_set_default(dev);
694 em28xx_compression_disable(dev);
695
696 return 0;
697 }
698
699 /*
700 * em28xx_config_i2c()
701 * configure i2c attached devices
702 */
703 static void em28xx_config_i2c(struct em28xx *dev)
704 {
705 struct v4l2_routing route;
706
707 route.input = INPUT(dev->ctl_input)->vmux;
708 route.output = 0;
709 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
710 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
711 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
712 }
713
714 static void video_mux(struct em28xx *dev, int index)
715 {
716 struct v4l2_routing route;
717
718 route.input = INPUT(index)->vmux;
719 route.output = 0;
720 dev->ctl_input = index;
721 dev->ctl_ainput = INPUT(index)->amux;
722
723 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
724
725 if (dev->has_msp34xx) {
726 if (dev->i2s_speed)
727 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
728 route.input = dev->ctl_ainput;
729 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
730 /* Note: this is msp3400 specific */
731 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
732 }
733
734 em28xx_audio_analog_set(dev);
735 }
736
737 /* Usage lock check functions */
738 static int res_get(struct em28xx_fh *fh)
739 {
740 struct em28xx *dev = fh->dev;
741 int rc = 0;
742
743 /* This instance already has stream_on */
744 if (fh->stream_on)
745 return rc;
746
747 if (dev->stream_on)
748 return -EINVAL;
749
750 mutex_lock(&dev->lock);
751 dev->stream_on = 1;
752 fh->stream_on = 1;
753 mutex_unlock(&dev->lock);
754 return rc;
755 }
756
757 static int res_check(struct em28xx_fh *fh)
758 {
759 return (fh->stream_on);
760 }
761
762 static void res_free(struct em28xx_fh *fh)
763 {
764 struct em28xx *dev = fh->dev;
765
766 mutex_lock(&dev->lock);
767 fh->stream_on = 0;
768 dev->stream_on = 0;
769 mutex_unlock(&dev->lock);
770 }
771
772 /*
773 * em28xx_get_ctrl()
774 * return the current saturation, brightness or contrast, mute state
775 */
776 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
777 {
778 switch (ctrl->id) {
779 case V4L2_CID_AUDIO_MUTE:
780 ctrl->value = dev->mute;
781 return 0;
782 case V4L2_CID_AUDIO_VOLUME:
783 ctrl->value = dev->volume;
784 return 0;
785 default:
786 return -EINVAL;
787 }
788 }
789
790 /*
791 * em28xx_set_ctrl()
792 * mute or set new saturation, brightness or contrast
793 */
794 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
795 {
796 switch (ctrl->id) {
797 case V4L2_CID_AUDIO_MUTE:
798 if (ctrl->value != dev->mute) {
799 dev->mute = ctrl->value;
800 return em28xx_audio_analog_set(dev);
801 }
802 return 0;
803 case V4L2_CID_AUDIO_VOLUME:
804 dev->volume = ctrl->value;
805 return em28xx_audio_analog_set(dev);
806 default:
807 return -EINVAL;
808 }
809 }
810
811 static int check_dev(struct em28xx *dev)
812 {
813 if (dev->state & DEV_DISCONNECTED) {
814 em28xx_errdev("v4l2 ioctl: device not present\n");
815 return -ENODEV;
816 }
817
818 if (dev->state & DEV_MISCONFIGURED) {
819 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
820 "close and open it again\n");
821 return -EIO;
822 }
823 return 0;
824 }
825
826 static void get_scale(struct em28xx *dev,
827 unsigned int width, unsigned int height,
828 unsigned int *hscale, unsigned int *vscale)
829 {
830 unsigned int maxw = norm_maxw(dev);
831 unsigned int maxh = norm_maxh(dev);
832
833 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
834 if (*hscale >= 0x4000)
835 *hscale = 0x3fff;
836
837 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
838 if (*vscale >= 0x4000)
839 *vscale = 0x3fff;
840 }
841
842 /* ------------------------------------------------------------------
843 IOCTL vidioc handling
844 ------------------------------------------------------------------*/
845
846 static int vidioc_g_fmt_cap(struct file *file, void *priv,
847 struct v4l2_format *f)
848 {
849 struct em28xx_fh *fh = priv;
850 struct em28xx *dev = fh->dev;
851
852 mutex_lock(&dev->lock);
853
854 f->fmt.pix.width = dev->width;
855 f->fmt.pix.height = dev->height;
856 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
857 f->fmt.pix.bytesperline = dev->bytesperline;
858 f->fmt.pix.sizeimage = dev->frame_size;
859 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
860
861 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
862 f->fmt.pix.field = dev->interlaced ?
863 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
864
865 mutex_unlock(&dev->lock);
866 return 0;
867 }
868
869 static int vidioc_try_fmt_cap(struct file *file, void *priv,
870 struct v4l2_format *f)
871 {
872 struct em28xx_fh *fh = priv;
873 struct em28xx *dev = fh->dev;
874 int width = f->fmt.pix.width;
875 int height = f->fmt.pix.height;
876 unsigned int maxw = norm_maxw(dev);
877 unsigned int maxh = norm_maxh(dev);
878 unsigned int hscale, vscale;
879
880 /* width must even because of the YUYV format
881 height must be even because of interlacing */
882 height &= 0xfffe;
883 width &= 0xfffe;
884
885 if (height < 32)
886 height = 32;
887 if (height > maxh)
888 height = maxh;
889 if (width < 48)
890 width = 48;
891 if (width > maxw)
892 width = maxw;
893
894 mutex_lock(&dev->lock);
895
896 if (dev->is_em2800) {
897 /* the em2800 can only scale down to 50% */
898 if (height % (maxh / 2))
899 height = maxh;
900 if (width % (maxw / 2))
901 width = maxw;
902 /* according to empiatech support */
903 /* the MaxPacketSize is to small to support */
904 /* framesizes larger than 640x480 @ 30 fps */
905 /* or 640x576 @ 25 fps. As this would cut */
906 /* of a part of the image we prefer */
907 /* 360x576 or 360x480 for now */
908 if (width == maxw && height == maxh)
909 width /= 2;
910 }
911
912 get_scale(dev, width, height, &hscale, &vscale);
913
914 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
915 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
916
917 f->fmt.pix.width = width;
918 f->fmt.pix.height = height;
919 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
920 f->fmt.pix.bytesperline = width * 2;
921 f->fmt.pix.sizeimage = width * 2 * height;
922 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
923 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
924
925 mutex_unlock(&dev->lock);
926 return 0;
927 }
928
929 static int vidioc_s_fmt_cap(struct file *file, void *priv,
930 struct v4l2_format *f)
931 {
932 struct em28xx_fh *fh = priv;
933 struct em28xx *dev = fh->dev;
934 int rc;
935
936 rc = check_dev(dev);
937 if (rc < 0)
938 return rc;
939
940 vidioc_try_fmt_cap(file, priv, f);
941
942 mutex_lock(&dev->lock);
943
944 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
945 em28xx_errdev("%s queue busy\n", __func__);
946 rc = -EBUSY;
947 goto out;
948 }
949
950 if (dev->stream_on && !fh->stream_on) {
951 em28xx_errdev("%s device in use by another fh\n", __func__);
952 rc = -EBUSY;
953 goto out;
954 }
955
956 /* set new image size */
957 dev->width = f->fmt.pix.width;
958 dev->height = f->fmt.pix.height;
959 dev->frame_size = dev->width * dev->height * 2;
960 dev->field_size = dev->frame_size >> 1;
961 dev->bytesperline = dev->width * 2;
962 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
963
964 em28xx_set_alternate(dev);
965 em28xx_resolution_set(dev);
966
967 rc = 0;
968
969 out:
970 mutex_unlock(&dev->lock);
971 return rc;
972 }
973
974 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
975 {
976 struct em28xx_fh *fh = priv;
977 struct em28xx *dev = fh->dev;
978 struct v4l2_format f;
979 int rc;
980
981 rc = check_dev(dev);
982 if (rc < 0)
983 return rc;
984
985 mutex_lock(&dev->lock);
986 dev->norm = *norm;
987 mutex_unlock(&dev->lock);
988
989 /* Adjusts width/height, if needed */
990 f.fmt.pix.width = dev->width;
991 f.fmt.pix.height = dev->height;
992 vidioc_try_fmt_cap(file, priv, &f);
993
994 mutex_lock(&dev->lock);
995
996 /* set new image size */
997 dev->width = f.fmt.pix.width;
998 dev->height = f.fmt.pix.height;
999 dev->frame_size = dev->width * dev->height * 2;
1000 dev->field_size = dev->frame_size >> 1;
1001 dev->bytesperline = dev->width * 2;
1002 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
1003
1004 em28xx_resolution_set(dev);
1005 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
1006
1007 mutex_unlock(&dev->lock);
1008 return 0;
1009 }
1010
1011 static const char *iname[] = {
1012 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
1013 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
1014 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
1015 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
1016 [EM28XX_VMUX_SVIDEO] = "S-Video",
1017 [EM28XX_VMUX_TELEVISION] = "Television",
1018 [EM28XX_VMUX_CABLE] = "Cable TV",
1019 [EM28XX_VMUX_DVB] = "DVB",
1020 [EM28XX_VMUX_DEBUG] = "for debug only",
1021 };
1022
1023 static int vidioc_enum_input(struct file *file, void *priv,
1024 struct v4l2_input *i)
1025 {
1026 struct em28xx_fh *fh = priv;
1027 struct em28xx *dev = fh->dev;
1028 unsigned int n;
1029
1030 n = i->index;
1031 if (n >= MAX_EM28XX_INPUT)
1032 return -EINVAL;
1033 if (0 == INPUT(n)->type)
1034 return -EINVAL;
1035
1036 i->index = n;
1037 i->type = V4L2_INPUT_TYPE_CAMERA;
1038
1039 strcpy(i->name, iname[INPUT(n)->type]);
1040
1041 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
1042 (EM28XX_VMUX_CABLE == INPUT(n)->type))
1043 i->type = V4L2_INPUT_TYPE_TUNER;
1044
1045 i->std = dev->vdev->tvnorms;
1046
1047 return 0;
1048 }
1049
1050 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1051 {
1052 struct em28xx_fh *fh = priv;
1053 struct em28xx *dev = fh->dev;
1054
1055 *i = dev->ctl_input;
1056
1057 return 0;
1058 }
1059
1060 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1061 {
1062 struct em28xx_fh *fh = priv;
1063 struct em28xx *dev = fh->dev;
1064 int rc;
1065
1066 rc = check_dev(dev);
1067 if (rc < 0)
1068 return rc;
1069
1070 if (i >= MAX_EM28XX_INPUT)
1071 return -EINVAL;
1072 if (0 == INPUT(i)->type)
1073 return -EINVAL;
1074
1075 mutex_lock(&dev->lock);
1076
1077 video_mux(dev, i);
1078
1079 mutex_unlock(&dev->lock);
1080 return 0;
1081 }
1082
1083 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1084 {
1085 struct em28xx_fh *fh = priv;
1086 struct em28xx *dev = fh->dev;
1087 unsigned int index = a->index;
1088
1089 if (a->index > 1)
1090 return -EINVAL;
1091
1092 index = dev->ctl_ainput;
1093
1094 if (index == 0) {
1095 strcpy(a->name, "Television");
1096 } else {
1097 strcpy(a->name, "Line In");
1098 }
1099 a->capability = V4L2_AUDCAP_STEREO;
1100 a->index = index;
1101
1102 return 0;
1103 }
1104
1105 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
1106 {
1107 struct em28xx_fh *fh = priv;
1108 struct em28xx *dev = fh->dev;
1109
1110 if (a->index != dev->ctl_ainput)
1111 return -EINVAL;
1112
1113 return 0;
1114 }
1115
1116 static int vidioc_queryctrl(struct file *file, void *priv,
1117 struct v4l2_queryctrl *qc)
1118 {
1119 struct em28xx_fh *fh = priv;
1120 struct em28xx *dev = fh->dev;
1121 int id = qc->id;
1122 int i;
1123 int rc;
1124
1125 rc = check_dev(dev);
1126 if (rc < 0)
1127 return rc;
1128
1129 memset(qc, 0, sizeof(*qc));
1130
1131 qc->id = id;
1132
1133 if (!dev->has_msp34xx) {
1134 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1135 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1136 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1137 return 0;
1138 }
1139 }
1140 }
1141 mutex_lock(&dev->lock);
1142 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
1143 mutex_unlock(&dev->lock);
1144
1145 if (qc->type)
1146 return 0;
1147 else
1148 return -EINVAL;
1149 }
1150
1151 static int vidioc_g_ctrl(struct file *file, void *priv,
1152 struct v4l2_control *ctrl)
1153 {
1154 struct em28xx_fh *fh = priv;
1155 struct em28xx *dev = fh->dev;
1156 int rc;
1157
1158 rc = check_dev(dev);
1159 if (rc < 0)
1160 return rc;
1161 mutex_lock(&dev->lock);
1162
1163 if (!dev->has_msp34xx)
1164 rc = em28xx_get_ctrl(dev, ctrl);
1165 else
1166 rc = -EINVAL;
1167
1168 if (rc == -EINVAL) {
1169 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1170 rc = 0;
1171 }
1172
1173 mutex_unlock(&dev->lock);
1174 return rc;
1175 }
1176
1177 static int vidioc_s_ctrl(struct file *file, void *priv,
1178 struct v4l2_control *ctrl)
1179 {
1180 struct em28xx_fh *fh = priv;
1181 struct em28xx *dev = fh->dev;
1182 u8 i;
1183 int rc;
1184
1185 rc = check_dev(dev);
1186 if (rc < 0)
1187 return rc;
1188
1189 mutex_lock(&dev->lock);
1190
1191 if (dev->has_msp34xx)
1192 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1193 else {
1194 rc = 1;
1195 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1196 if (ctrl->id == em28xx_qctrl[i].id) {
1197 if (ctrl->value < em28xx_qctrl[i].minimum ||
1198 ctrl->value > em28xx_qctrl[i].maximum) {
1199 rc = -ERANGE;
1200 break;
1201 }
1202
1203 rc = em28xx_set_ctrl(dev, ctrl);
1204 break;
1205 }
1206 }
1207 }
1208
1209 /* Control not found - try to send it to the attached devices */
1210 if (rc == 1) {
1211 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1212 rc = 0;
1213 }
1214
1215 mutex_unlock(&dev->lock);
1216 return rc;
1217 }
1218
1219 static int vidioc_g_tuner(struct file *file, void *priv,
1220 struct v4l2_tuner *t)
1221 {
1222 struct em28xx_fh *fh = priv;
1223 struct em28xx *dev = fh->dev;
1224 int rc;
1225
1226 rc = check_dev(dev);
1227 if (rc < 0)
1228 return rc;
1229
1230 if (0 != t->index)
1231 return -EINVAL;
1232
1233 strcpy(t->name, "Tuner");
1234
1235 mutex_lock(&dev->lock);
1236
1237 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1238
1239 mutex_unlock(&dev->lock);
1240 return 0;
1241 }
1242
1243 static int vidioc_s_tuner(struct file *file, void *priv,
1244 struct v4l2_tuner *t)
1245 {
1246 struct em28xx_fh *fh = priv;
1247 struct em28xx *dev = fh->dev;
1248 int rc;
1249
1250 rc = check_dev(dev);
1251 if (rc < 0)
1252 return rc;
1253
1254 if (0 != t->index)
1255 return -EINVAL;
1256
1257 mutex_lock(&dev->lock);
1258
1259 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1260
1261 mutex_unlock(&dev->lock);
1262 return 0;
1263 }
1264
1265 static int vidioc_g_frequency(struct file *file, void *priv,
1266 struct v4l2_frequency *f)
1267 {
1268 struct em28xx_fh *fh = priv;
1269 struct em28xx *dev = fh->dev;
1270
1271 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1272 f->frequency = dev->ctl_freq;
1273
1274 return 0;
1275 }
1276
1277 static int vidioc_s_frequency(struct file *file, void *priv,
1278 struct v4l2_frequency *f)
1279 {
1280 struct em28xx_fh *fh = priv;
1281 struct em28xx *dev = fh->dev;
1282 int rc;
1283
1284 rc = check_dev(dev);
1285 if (rc < 0)
1286 return rc;
1287
1288 if (0 != f->tuner)
1289 return -EINVAL;
1290
1291 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1292 return -EINVAL;
1293 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1294 return -EINVAL;
1295
1296 mutex_lock(&dev->lock);
1297
1298 dev->ctl_freq = f->frequency;
1299 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1300
1301 mutex_unlock(&dev->lock);
1302 return 0;
1303 }
1304
1305 #ifdef CONFIG_VIDEO_ADV_DEBUG
1306 static int em28xx_reg_len(int reg)
1307 {
1308 switch (reg) {
1309 case AC97LSB_REG:
1310 case HSCALELOW_REG:
1311 case VSCALELOW_REG:
1312 return 2;
1313 default:
1314 return 1;
1315 }
1316 }
1317
1318 static int vidioc_g_register(struct file *file, void *priv,
1319 struct v4l2_register *reg)
1320 {
1321 struct em28xx_fh *fh = priv;
1322 struct em28xx *dev = fh->dev;
1323 int ret;
1324
1325 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1326 return -EINVAL;
1327
1328 if (em28xx_reg_len(reg->reg) == 1) {
1329 ret = em28xx_read_reg(dev, reg->reg);
1330 if (ret < 0)
1331 return ret;
1332
1333 reg->val = ret;
1334 } else {
1335 u64 val = 0;
1336 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1337 reg->reg, (char *)&val, 2);
1338 if (ret < 0)
1339 return ret;
1340
1341 reg->val = cpu_to_le64((__u64)val);
1342 }
1343
1344 return 0;
1345 }
1346
1347 static int vidioc_s_register(struct file *file, void *priv,
1348 struct v4l2_register *reg)
1349 {
1350 struct em28xx_fh *fh = priv;
1351 struct em28xx *dev = fh->dev;
1352 u64 buf;
1353
1354 buf = le64_to_cpu((__u64)reg->val);
1355
1356 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1357 em28xx_reg_len(reg->reg));
1358 }
1359 #endif
1360
1361
1362 static int vidioc_cropcap(struct file *file, void *priv,
1363 struct v4l2_cropcap *cc)
1364 {
1365 struct em28xx_fh *fh = priv;
1366 struct em28xx *dev = fh->dev;
1367
1368 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1369 return -EINVAL;
1370
1371 cc->bounds.left = 0;
1372 cc->bounds.top = 0;
1373 cc->bounds.width = dev->width;
1374 cc->bounds.height = dev->height;
1375 cc->defrect = cc->bounds;
1376 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1377 cc->pixelaspect.denominator = 59;
1378
1379 return 0;
1380 }
1381
1382 static int vidioc_streamon(struct file *file, void *priv,
1383 enum v4l2_buf_type type)
1384 {
1385 struct em28xx_fh *fh = priv;
1386 struct em28xx *dev = fh->dev;
1387 int rc;
1388
1389 rc = check_dev(dev);
1390 if (rc < 0)
1391 return rc;
1392
1393
1394 if (unlikely(res_get(fh) < 0))
1395 return -EBUSY;
1396
1397 return (videobuf_streamon(&fh->vb_vidq));
1398 }
1399
1400 static int vidioc_streamoff(struct file *file, void *priv,
1401 enum v4l2_buf_type type)
1402 {
1403 struct em28xx_fh *fh = priv;
1404 struct em28xx *dev = fh->dev;
1405 int rc;
1406
1407 rc = check_dev(dev);
1408 if (rc < 0)
1409 return rc;
1410
1411 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1412 return -EINVAL;
1413 if (type != fh->type)
1414 return -EINVAL;
1415
1416 videobuf_streamoff(&fh->vb_vidq);
1417 res_free(fh);
1418
1419 return 0;
1420 }
1421
1422 static int vidioc_querycap(struct file *file, void *priv,
1423 struct v4l2_capability *cap)
1424 {
1425 struct em28xx_fh *fh = priv;
1426 struct em28xx *dev = fh->dev;
1427
1428 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1429 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1430 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1431
1432 cap->version = EM28XX_VERSION_CODE;
1433
1434 cap->capabilities =
1435 V4L2_CAP_SLICED_VBI_CAPTURE |
1436 V4L2_CAP_VIDEO_CAPTURE |
1437 V4L2_CAP_AUDIO |
1438 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1439
1440 if (dev->tuner_type != TUNER_ABSENT)
1441 cap->capabilities |= V4L2_CAP_TUNER;
1442
1443 return 0;
1444 }
1445
1446 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
1447 struct v4l2_fmtdesc *fmtd)
1448 {
1449 if (fmtd->index != 0)
1450 return -EINVAL;
1451
1452 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1453 strcpy(fmtd->description, "Packed YUY2");
1454 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1455 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1456
1457 return 0;
1458 }
1459
1460 /* Sliced VBI ioctls */
1461 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1462 struct v4l2_format *f)
1463 {
1464 struct em28xx_fh *fh = priv;
1465 struct em28xx *dev = fh->dev;
1466 int rc;
1467
1468 rc = check_dev(dev);
1469 if (rc < 0)
1470 return rc;
1471
1472 mutex_lock(&dev->lock);
1473
1474 f->fmt.sliced.service_set = 0;
1475
1476 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1477
1478 if (f->fmt.sliced.service_set == 0)
1479 rc = -EINVAL;
1480
1481 mutex_unlock(&dev->lock);
1482 return rc;
1483 }
1484
1485 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1486 struct v4l2_format *f)
1487 {
1488 struct em28xx_fh *fh = priv;
1489 struct em28xx *dev = fh->dev;
1490 int rc;
1491
1492 rc = check_dev(dev);
1493 if (rc < 0)
1494 return rc;
1495
1496 mutex_lock(&dev->lock);
1497 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1498 mutex_unlock(&dev->lock);
1499
1500 if (f->fmt.sliced.service_set == 0)
1501 return -EINVAL;
1502
1503 return 0;
1504 }
1505
1506
1507 static int vidioc_reqbufs(struct file *file, void *priv,
1508 struct v4l2_requestbuffers *rb)
1509 {
1510 struct em28xx_fh *fh = priv;
1511 struct em28xx *dev = fh->dev;
1512 int rc;
1513
1514 rc = check_dev(dev);
1515 if (rc < 0)
1516 return rc;
1517
1518 return (videobuf_reqbufs(&fh->vb_vidq, rb));
1519 }
1520
1521 static int vidioc_querybuf(struct file *file, void *priv,
1522 struct v4l2_buffer *b)
1523 {
1524 struct em28xx_fh *fh = priv;
1525 struct em28xx *dev = fh->dev;
1526 int rc;
1527
1528 rc = check_dev(dev);
1529 if (rc < 0)
1530 return rc;
1531
1532 return (videobuf_querybuf(&fh->vb_vidq, b));
1533 }
1534
1535 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1536 {
1537 struct em28xx_fh *fh = priv;
1538 struct em28xx *dev = fh->dev;
1539 int rc;
1540
1541 rc = check_dev(dev);
1542 if (rc < 0)
1543 return rc;
1544
1545 return (videobuf_qbuf(&fh->vb_vidq, b));
1546 }
1547
1548 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1549 {
1550 struct em28xx_fh *fh = priv;
1551 struct em28xx *dev = fh->dev;
1552 int rc;
1553
1554 rc = check_dev(dev);
1555 if (rc < 0)
1556 return rc;
1557
1558 return (videobuf_dqbuf(&fh->vb_vidq, b,
1559 file->f_flags & O_NONBLOCK));
1560 }
1561
1562 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1563 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1564 {
1565 struct em28xx_fh *fh = priv;
1566
1567 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1568 }
1569 #endif
1570
1571
1572 /* ----------------------------------------------------------- */
1573 /* RADIO ESPECIFIC IOCTLS */
1574 /* ----------------------------------------------------------- */
1575
1576 static int radio_querycap(struct file *file, void *priv,
1577 struct v4l2_capability *cap)
1578 {
1579 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1580
1581 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1582 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1583 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1584
1585 cap->version = EM28XX_VERSION_CODE;
1586 cap->capabilities = V4L2_CAP_TUNER;
1587 return 0;
1588 }
1589
1590 static int radio_g_tuner(struct file *file, void *priv,
1591 struct v4l2_tuner *t)
1592 {
1593 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1594
1595 if (unlikely(t->index > 0))
1596 return -EINVAL;
1597
1598 strcpy(t->name, "Radio");
1599 t->type = V4L2_TUNER_RADIO;
1600
1601 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1602 return 0;
1603 }
1604
1605 static int radio_enum_input(struct file *file, void *priv,
1606 struct v4l2_input *i)
1607 {
1608 if (i->index != 0)
1609 return -EINVAL;
1610 strcpy(i->name, "Radio");
1611 i->type = V4L2_INPUT_TYPE_TUNER;
1612
1613 return 0;
1614 }
1615
1616 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1617 {
1618 if (unlikely(a->index))
1619 return -EINVAL;
1620
1621 strcpy(a->name, "Radio");
1622 return 0;
1623 }
1624
1625 static int radio_s_tuner(struct file *file, void *priv,
1626 struct v4l2_tuner *t)
1627 {
1628 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1629
1630 if (0 != t->index)
1631 return -EINVAL;
1632
1633 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1634
1635 return 0;
1636 }
1637
1638 static int radio_s_audio(struct file *file, void *fh,
1639 struct v4l2_audio *a)
1640 {
1641 return 0;
1642 }
1643
1644 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1645 {
1646 return 0;
1647 }
1648
1649 static int radio_queryctrl(struct file *file, void *priv,
1650 struct v4l2_queryctrl *qc)
1651 {
1652 int i;
1653
1654 if (qc->id < V4L2_CID_BASE ||
1655 qc->id >= V4L2_CID_LASTP1)
1656 return -EINVAL;
1657
1658 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1659 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1660 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1661 return 0;
1662 }
1663 }
1664
1665 return -EINVAL;
1666 }
1667
1668 /*
1669 * em28xx_v4l2_open()
1670 * inits the device and starts isoc transfer
1671 */
1672 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1673 {
1674 int minor = iminor(inode);
1675 int errCode = 0, radio = 0;
1676 struct em28xx *h,*dev = NULL;
1677 struct em28xx_fh *fh;
1678 enum v4l2_buf_type fh_type = 0;
1679
1680 list_for_each_entry(h, &em28xx_devlist, devlist) {
1681 if (h->vdev->minor == minor) {
1682 dev = h;
1683 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1684 }
1685 if (h->vbi_dev->minor == minor) {
1686 dev = h;
1687 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1688 }
1689 if (h->radio_dev &&
1690 h->radio_dev->minor == minor) {
1691 radio = 1;
1692 dev = h;
1693 }
1694 }
1695 if (NULL == dev)
1696 return -ENODEV;
1697
1698 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1699 minor, v4l2_type_names[fh_type], dev->users);
1700
1701 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1702
1703 if (!fh) {
1704 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1705 return -ENOMEM;
1706 }
1707 mutex_lock(&dev->lock);
1708 fh->dev = dev;
1709 fh->radio = radio;
1710 fh->type = fh_type;
1711 filp->private_data = fh;
1712
1713 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1714 dev->width = norm_maxw(dev);
1715 dev->height = norm_maxh(dev);
1716 dev->frame_size = dev->width * dev->height * 2;
1717 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1718 dev->bytesperline = dev->width * 2;
1719 dev->hscale = 0;
1720 dev->vscale = 0;
1721
1722 em28xx_set_alternate(dev);
1723 em28xx_resolution_set(dev);
1724
1725 }
1726 if (fh->radio) {
1727 em28xx_videodbg("video_open: setting radio device\n");
1728 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1729 }
1730
1731 dev->users++;
1732
1733 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1734 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1735 sizeof(struct em28xx_buffer), fh);
1736
1737 mutex_unlock(&dev->lock);
1738 return errCode;
1739 }
1740
1741 /*
1742 * em28xx_realease_resources()
1743 * unregisters the v4l2,i2c and usb devices
1744 * called when the device gets disconected or at module unload
1745 */
1746 static void em28xx_release_resources(struct em28xx *dev)
1747 {
1748
1749 /*FIXME: I2C IR should be disconnected */
1750
1751 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1752 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1753 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1754 list_del(&dev->devlist);
1755 if (dev->radio_dev) {
1756 if (-1 != dev->radio_dev->minor)
1757 video_unregister_device(dev->radio_dev);
1758 else
1759 video_device_release(dev->radio_dev);
1760 dev->radio_dev = NULL;
1761 }
1762 if (dev->vbi_dev) {
1763 if (-1 != dev->vbi_dev->minor)
1764 video_unregister_device(dev->vbi_dev);
1765 else
1766 video_device_release(dev->vbi_dev);
1767 dev->vbi_dev = NULL;
1768 }
1769 if (dev->vdev) {
1770 if (-1 != dev->vdev->minor)
1771 video_unregister_device(dev->vdev);
1772 else
1773 video_device_release(dev->vdev);
1774 dev->vdev = NULL;
1775 }
1776 em28xx_i2c_unregister(dev);
1777 usb_put_dev(dev->udev);
1778
1779 /* Mark device as unused */
1780 em28xx_devused&=~(1<<dev->devno);
1781 }
1782
1783 /*
1784 * em28xx_v4l2_close()
1785 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1786 */
1787 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1788 {
1789 struct em28xx_fh *fh = filp->private_data;
1790 struct em28xx *dev = fh->dev;
1791 int errCode;
1792
1793 em28xx_videodbg("users=%d\n", dev->users);
1794
1795
1796 if (res_check(fh))
1797 res_free(fh);
1798
1799 mutex_lock(&dev->lock);
1800
1801 if (dev->users == 1) {
1802 videobuf_stop(&fh->vb_vidq);
1803 videobuf_mmap_free(&fh->vb_vidq);
1804
1805 /* the device is already disconnect,
1806 free the remaining resources */
1807 if (dev->state & DEV_DISCONNECTED) {
1808 em28xx_release_resources(dev);
1809 mutex_unlock(&dev->lock);
1810 kfree(dev);
1811 return 0;
1812 }
1813
1814 /* do this before setting alternate! */
1815 em28xx_uninit_isoc(dev);
1816
1817 /* set alternate 0 */
1818 dev->alt = 0;
1819 em28xx_videodbg("setting alternate 0\n");
1820 errCode = usb_set_interface(dev->udev, 0, 0);
1821 if (errCode < 0) {
1822 em28xx_errdev("cannot change alternate number to "
1823 "0 (error=%i)\n", errCode);
1824 }
1825 }
1826 kfree(fh);
1827 dev->users--;
1828 wake_up_interruptible_nr(&dev->open, 1);
1829 mutex_unlock(&dev->lock);
1830 return 0;
1831 }
1832
1833 /*
1834 * em28xx_v4l2_read()
1835 * will allocate buffers when called for the first time
1836 */
1837 static ssize_t
1838 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1839 loff_t *pos)
1840 {
1841 struct em28xx_fh *fh = filp->private_data;
1842 struct em28xx *dev = fh->dev;
1843 int rc;
1844
1845 rc = check_dev(dev);
1846 if (rc < 0)
1847 return rc;
1848
1849 /* FIXME: read() is not prepared to allow changing the video
1850 resolution while streaming. Seems a bug at em28xx_set_fmt
1851 */
1852
1853 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1854 if (unlikely(res_get(fh)))
1855 return -EBUSY;
1856
1857 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1858 filp->f_flags & O_NONBLOCK);
1859 }
1860 return 0;
1861 }
1862
1863 /*
1864 * em28xx_v4l2_poll()
1865 * will allocate buffers when called for the first time
1866 */
1867 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1868 {
1869 struct em28xx_fh *fh = filp->private_data;
1870 struct em28xx *dev = fh->dev;
1871 int rc;
1872
1873 rc = check_dev(dev);
1874 if (rc < 0)
1875 return rc;
1876
1877 if (unlikely(res_get(fh) < 0))
1878 return POLLERR;
1879
1880 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1881 return POLLERR;
1882
1883 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1884 }
1885
1886 /*
1887 * em28xx_v4l2_mmap()
1888 */
1889 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1890 {
1891 struct em28xx_fh *fh = filp->private_data;
1892 struct em28xx *dev = fh->dev;
1893 int rc;
1894
1895 if (unlikely(res_get(fh) < 0))
1896 return -EBUSY;
1897
1898 rc = check_dev(dev);
1899 if (rc < 0)
1900 return rc;
1901
1902 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1903
1904 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1905 (unsigned long)vma->vm_start,
1906 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1907 rc);
1908
1909 return rc;
1910 }
1911
1912 static const struct file_operations em28xx_v4l_fops = {
1913 .owner = THIS_MODULE,
1914 .open = em28xx_v4l2_open,
1915 .release = em28xx_v4l2_close,
1916 .read = em28xx_v4l2_read,
1917 .poll = em28xx_v4l2_poll,
1918 .mmap = em28xx_v4l2_mmap,
1919 .ioctl = video_ioctl2,
1920 .llseek = no_llseek,
1921 .compat_ioctl = v4l_compat_ioctl32,
1922 };
1923
1924 static const struct file_operations radio_fops = {
1925 .owner = THIS_MODULE,
1926 .open = em28xx_v4l2_open,
1927 .release = em28xx_v4l2_close,
1928 .ioctl = video_ioctl2,
1929 .compat_ioctl = v4l_compat_ioctl32,
1930 .llseek = no_llseek,
1931 };
1932
1933 static const struct video_device em28xx_video_template = {
1934 .fops = &em28xx_v4l_fops,
1935 .release = video_device_release,
1936
1937 .minor = -1,
1938 .vidioc_querycap = vidioc_querycap,
1939 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1940 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1941 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1942 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1943 .vidioc_g_audio = vidioc_g_audio,
1944 .vidioc_s_audio = vidioc_s_audio,
1945 .vidioc_cropcap = vidioc_cropcap,
1946
1947 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1948 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1949 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1950
1951 .vidioc_reqbufs = vidioc_reqbufs,
1952 .vidioc_querybuf = vidioc_querybuf,
1953 .vidioc_qbuf = vidioc_qbuf,
1954 .vidioc_dqbuf = vidioc_dqbuf,
1955 .vidioc_s_std = vidioc_s_std,
1956 .vidioc_enum_input = vidioc_enum_input,
1957 .vidioc_g_input = vidioc_g_input,
1958 .vidioc_s_input = vidioc_s_input,
1959 .vidioc_queryctrl = vidioc_queryctrl,
1960 .vidioc_g_ctrl = vidioc_g_ctrl,
1961 .vidioc_s_ctrl = vidioc_s_ctrl,
1962 .vidioc_streamon = vidioc_streamon,
1963 .vidioc_streamoff = vidioc_streamoff,
1964 .vidioc_g_tuner = vidioc_g_tuner,
1965 .vidioc_s_tuner = vidioc_s_tuner,
1966 .vidioc_g_frequency = vidioc_g_frequency,
1967 .vidioc_s_frequency = vidioc_s_frequency,
1968 #ifdef CONFIG_VIDEO_ADV_DEBUG
1969 .vidioc_g_register = vidioc_g_register,
1970 .vidioc_s_register = vidioc_s_register,
1971 #endif
1972 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1973 .vidiocgmbuf = vidiocgmbuf,
1974 #endif
1975
1976 .tvnorms = V4L2_STD_ALL,
1977 .current_norm = V4L2_STD_PAL,
1978 };
1979
1980 static struct video_device em28xx_radio_template = {
1981 .name = "em28xx-radio",
1982 .type = VID_TYPE_TUNER,
1983 .fops = &radio_fops,
1984 .minor = -1,
1985 .vidioc_querycap = radio_querycap,
1986 .vidioc_g_tuner = radio_g_tuner,
1987 .vidioc_enum_input = radio_enum_input,
1988 .vidioc_g_audio = radio_g_audio,
1989 .vidioc_s_tuner = radio_s_tuner,
1990 .vidioc_s_audio = radio_s_audio,
1991 .vidioc_s_input = radio_s_input,
1992 .vidioc_queryctrl = radio_queryctrl,
1993 .vidioc_g_ctrl = vidioc_g_ctrl,
1994 .vidioc_s_ctrl = vidioc_s_ctrl,
1995 .vidioc_g_frequency = vidioc_g_frequency,
1996 .vidioc_s_frequency = vidioc_s_frequency,
1997 #ifdef CONFIG_VIDEO_ADV_DEBUG
1998 .vidioc_g_register = vidioc_g_register,
1999 .vidioc_s_register = vidioc_s_register,
2000 #endif
2001 };
2002
2003 /******************************** usb interface *****************************************/
2004
2005
2006 static LIST_HEAD(em28xx_extension_devlist);
2007 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
2008
2009 int em28xx_register_extension(struct em28xx_ops *ops)
2010 {
2011 struct em28xx *h, *dev = NULL;
2012
2013 list_for_each_entry(h, &em28xx_devlist, devlist)
2014 dev = h;
2015
2016 mutex_lock(&em28xx_extension_devlist_lock);
2017 list_add_tail(&ops->next, &em28xx_extension_devlist);
2018 if (dev)
2019 ops->init(dev);
2020
2021 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
2022 mutex_unlock(&em28xx_extension_devlist_lock);
2023
2024 return 0;
2025 }
2026 EXPORT_SYMBOL(em28xx_register_extension);
2027
2028 void em28xx_unregister_extension(struct em28xx_ops *ops)
2029 {
2030 struct em28xx *h, *dev = NULL;
2031
2032 list_for_each_entry(h, &em28xx_devlist, devlist)
2033 dev = h;
2034
2035 if (dev)
2036 ops->fini(dev);
2037
2038 mutex_lock(&em28xx_extension_devlist_lock);
2039 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
2040 list_del(&ops->next);
2041 mutex_unlock(&em28xx_extension_devlist_lock);
2042 }
2043 EXPORT_SYMBOL(em28xx_unregister_extension);
2044
2045 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
2046 const struct video_device *template,
2047 const int type,
2048 const char *type_name)
2049 {
2050 struct video_device *vfd;
2051
2052 vfd = video_device_alloc();
2053 if (NULL == vfd)
2054 return NULL;
2055 *vfd = *template;
2056 vfd->minor = -1;
2057 vfd->dev = &dev->udev->dev;
2058 vfd->release = video_device_release;
2059 vfd->type = type;
2060
2061 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
2062 dev->name, type_name);
2063
2064 return vfd;
2065 }
2066
2067
2068 /*
2069 * em28xx_init_dev()
2070 * allocates and inits the device structs, registers i2c bus and v4l device
2071 */
2072 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
2073 int minor)
2074 {
2075 struct em28xx_ops *ops = NULL;
2076 struct em28xx *dev = *devhandle;
2077 int retval = -ENOMEM;
2078 int errCode;
2079 unsigned int maxh, maxw;
2080
2081 dev->udev = udev;
2082 mutex_init(&dev->lock);
2083 spin_lock_init(&dev->slock);
2084 init_waitqueue_head(&dev->open);
2085 init_waitqueue_head(&dev->wait_frame);
2086 init_waitqueue_head(&dev->wait_stream);
2087
2088 dev->em28xx_write_regs = em28xx_write_regs;
2089 dev->em28xx_read_reg = em28xx_read_reg;
2090 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
2091 dev->em28xx_write_regs_req = em28xx_write_regs_req;
2092 dev->em28xx_read_reg_req = em28xx_read_reg_req;
2093 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
2094
2095 errCode = em28xx_read_reg(dev, CHIPID_REG);
2096 if (errCode >= 0)
2097 em28xx_info("em28xx chip ID = %d\n", errCode);
2098
2099 em28xx_pre_card_setup(dev);
2100
2101 errCode = em28xx_config(dev);
2102 if (errCode) {
2103 em28xx_errdev("error configuring device\n");
2104 em28xx_devused &= ~(1<<dev->devno);
2105 kfree(dev);
2106 return -ENOMEM;
2107 }
2108
2109 /* register i2c bus */
2110 em28xx_i2c_register(dev);
2111
2112 /* Do board specific init and eeprom reading */
2113 em28xx_card_setup(dev);
2114
2115 /* Configure audio */
2116 em28xx_audio_analog_set(dev);
2117
2118 /* configure the device */
2119 em28xx_config_i2c(dev);
2120
2121 /* set default norm */
2122 dev->norm = em28xx_video_template.current_norm;
2123
2124 maxw = norm_maxw(dev);
2125 maxh = norm_maxh(dev);
2126
2127 /* set default image size */
2128 dev->width = maxw;
2129 dev->height = maxh;
2130 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
2131 dev->field_size = dev->width * dev->height;
2132 dev->frame_size =
2133 dev->interlaced ? dev->field_size << 1 : dev->field_size;
2134 dev->bytesperline = dev->width * 2;
2135 dev->hscale = 0;
2136 dev->vscale = 0;
2137 dev->ctl_input = 2;
2138
2139 errCode = em28xx_config(dev);
2140
2141 list_add_tail(&dev->devlist, &em28xx_devlist);
2142
2143 /* allocate and fill video video_device struct */
2144 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
2145 VID_TYPE_CAPTURE, "video");
2146 if (NULL == dev->vdev) {
2147 em28xx_errdev("cannot allocate video_device.\n");
2148 goto fail_unreg;
2149 }
2150 if (dev->tuner_type != TUNER_ABSENT)
2151 dev->vdev->type |= VID_TYPE_TUNER;
2152
2153 /* register v4l2 video video_device */
2154 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
2155 video_nr[dev->devno]);
2156 if (retval) {
2157 em28xx_errdev("unable to register video device (error=%i).\n",
2158 retval);
2159 goto fail_unreg;
2160 }
2161
2162 /* Allocate and fill vbi video_device struct */
2163 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2164 VFL_TYPE_VBI, "vbi");
2165 /* register v4l2 vbi video_device */
2166 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2167 vbi_nr[dev->devno]) < 0) {
2168 em28xx_errdev("unable to register vbi device\n");
2169 retval = -ENODEV;
2170 goto fail_unreg;
2171 }
2172
2173 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2174 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2175 VFL_TYPE_RADIO, "radio");
2176 if (NULL == dev->radio_dev) {
2177 em28xx_errdev("cannot allocate video_device.\n");
2178 goto fail_unreg;
2179 }
2180 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2181 radio_nr[dev->devno]);
2182 if (retval < 0) {
2183 em28xx_errdev("can't register radio device\n");
2184 goto fail_unreg;
2185 }
2186 em28xx_info("Registered radio device as /dev/radio%d\n",
2187 dev->radio_dev->minor & 0x1f);
2188 }
2189
2190 /* init video dma queues */
2191 INIT_LIST_HEAD(&dev->vidq.active);
2192 INIT_LIST_HEAD(&dev->vidq.queued);
2193
2194
2195 if (dev->has_msp34xx) {
2196 /* Send a reset to other chips via gpio */
2197 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2198 msleep(3);
2199 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2200 msleep(3);
2201 }
2202
2203 video_mux(dev, 0);
2204
2205 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2206 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2207 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2208
2209 mutex_lock(&em28xx_extension_devlist_lock);
2210 if (!list_empty(&em28xx_extension_devlist)) {
2211 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2212 if (ops->id)
2213 ops->init(dev);
2214 }
2215 }
2216 mutex_unlock(&em28xx_extension_devlist_lock);
2217
2218 return 0;
2219
2220 fail_unreg:
2221 em28xx_release_resources(dev);
2222 mutex_unlock(&dev->lock);
2223 kfree(dev);
2224 return retval;
2225 }
2226
2227 #if defined(CONFIG_MODULES) && defined(MODULE)
2228 static void request_module_async(struct work_struct *work)
2229 {
2230 struct em28xx *dev = container_of(work,
2231 struct em28xx, request_module_wk);
2232
2233 if (dev->has_audio_class)
2234 request_module("snd-usb-audio");
2235 else
2236 request_module("em28xx-alsa");
2237 }
2238
2239 static void request_modules(struct em28xx *dev)
2240 {
2241 INIT_WORK(&dev->request_module_wk, request_module_async);
2242 schedule_work(&dev->request_module_wk);
2243 }
2244 #else
2245 #define request_modules(dev)
2246 #endif /* CONFIG_MODULES */
2247
2248 /*
2249 * em28xx_usb_probe()
2250 * checks for supported devices
2251 */
2252 static int em28xx_usb_probe(struct usb_interface *interface,
2253 const struct usb_device_id *id)
2254 {
2255 const struct usb_endpoint_descriptor *endpoint;
2256 struct usb_device *udev;
2257 struct usb_interface *uif;
2258 struct em28xx *dev = NULL;
2259 int retval = -ENODEV;
2260 int i, nr, ifnum;
2261
2262 udev = usb_get_dev(interface_to_usbdev(interface));
2263 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2264
2265 /* Check to see next free device and mark as used */
2266 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2267 em28xx_devused|=1<<nr;
2268
2269 /* Don't register audio interfaces */
2270 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2271 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2272 udev->descriptor.idVendor,udev->descriptor.idProduct,
2273 ifnum,
2274 interface->altsetting[0].desc.bInterfaceClass);
2275
2276 em28xx_devused&=~(1<<nr);
2277 return -ENODEV;
2278 }
2279
2280 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2281 udev->descriptor.idVendor,udev->descriptor.idProduct,
2282 ifnum,
2283 interface->altsetting[0].desc.bInterfaceClass);
2284
2285 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2286
2287 /* check if the device has the iso in endpoint at the correct place */
2288 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2289 USB_ENDPOINT_XFER_ISOC) {
2290 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2291 em28xx_devused&=~(1<<nr);
2292 return -ENODEV;
2293 }
2294 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2295 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2296 em28xx_devused&=~(1<<nr);
2297 return -ENODEV;
2298 }
2299
2300 if (nr >= EM28XX_MAXBOARDS) {
2301 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2302 em28xx_devused&=~(1<<nr);
2303 return -ENOMEM;
2304 }
2305
2306 /* allocate memory for our device state and initialize it */
2307 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2308 if (dev == NULL) {
2309 em28xx_err(DRIVER_NAME ": out of memory!\n");
2310 em28xx_devused&=~(1<<nr);
2311 return -ENOMEM;
2312 }
2313
2314 snprintf(dev->name, 29, "em28xx #%d", nr);
2315 dev->devno = nr;
2316 dev->model = id->driver_info;
2317 dev->alt = -1;
2318
2319 /* Checks if audio is provided by some interface */
2320 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2321 uif = udev->config->interface[i];
2322 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2323 dev->has_audio_class = 1;
2324 break;
2325 }
2326 }
2327
2328 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2329 dev->has_audio_class ? "Has" : "Doesn't have");
2330
2331 /* compute alternate max packet sizes */
2332 uif = udev->actconfig->interface[0];
2333
2334 dev->num_alt=uif->num_altsetting;
2335 em28xx_info("Alternate settings: %i\n",dev->num_alt);
2336 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2337 dev->alt_max_pkt_size = kmalloc(32*
2338 dev->num_alt,GFP_KERNEL);
2339 if (dev->alt_max_pkt_size == NULL) {
2340 em28xx_errdev("out of memory!\n");
2341 em28xx_devused&=~(1<<nr);
2342 kfree(dev);
2343 return -ENOMEM;
2344 }
2345
2346 for (i = 0; i < dev->num_alt ; i++) {
2347 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2348 wMaxPacketSize);
2349 dev->alt_max_pkt_size[i] =
2350 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2351 em28xx_info("Alternate setting %i, max size= %i\n",i,
2352 dev->alt_max_pkt_size[i]);
2353 }
2354
2355 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2356 dev->model = card[nr];
2357
2358 /* allocate device struct */
2359 retval = em28xx_init_dev(&dev, udev, nr);
2360 if (retval)
2361 return retval;
2362
2363 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2364
2365 /* save our data pointer in this interface device */
2366 usb_set_intfdata(interface, dev);
2367
2368 request_modules(dev);
2369
2370 return 0;
2371 }
2372
2373 /*
2374 * em28xx_usb_disconnect()
2375 * called when the device gets diconencted
2376 * video device will be unregistered on v4l2_close in case it is still open
2377 */
2378 static void em28xx_usb_disconnect(struct usb_interface *interface)
2379 {
2380 struct em28xx *dev;
2381 struct em28xx_ops *ops = NULL;
2382
2383 dev = usb_get_intfdata(interface);
2384 usb_set_intfdata(interface, NULL);
2385
2386 if (!dev)
2387 return;
2388
2389 em28xx_info("disconnecting %s\n", dev->vdev->name);
2390
2391 /* wait until all current v4l2 io is finished then deallocate resources */
2392 mutex_lock(&dev->lock);
2393
2394 wake_up_interruptible_all(&dev->open);
2395
2396 if (dev->users) {
2397 em28xx_warn
2398 ("device /dev/video%d is open! Deregistration and memory "
2399 "deallocation are deferred on close.\n",
2400 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2401
2402 dev->state |= DEV_MISCONFIGURED;
2403 em28xx_uninit_isoc(dev);
2404 dev->state |= DEV_DISCONNECTED;
2405 wake_up_interruptible(&dev->wait_frame);
2406 wake_up_interruptible(&dev->wait_stream);
2407 } else {
2408 dev->state |= DEV_DISCONNECTED;
2409 em28xx_release_resources(dev);
2410 }
2411 mutex_unlock(&dev->lock);
2412
2413 mutex_lock(&em28xx_extension_devlist_lock);
2414 if (!list_empty(&em28xx_extension_devlist)) {
2415 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2416 ops->fini(dev);
2417 }
2418 }
2419 mutex_unlock(&em28xx_extension_devlist_lock);
2420
2421 if (!dev->users) {
2422 kfree(dev->alt_max_pkt_size);
2423 kfree(dev);
2424 }
2425 }
2426
2427 static struct usb_driver em28xx_usb_driver = {
2428 .name = "em28xx",
2429 .probe = em28xx_usb_probe,
2430 .disconnect = em28xx_usb_disconnect,
2431 .id_table = em28xx_id_table,
2432 };
2433
2434 static int __init em28xx_module_init(void)
2435 {
2436 int result;
2437
2438 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2439 (EM28XX_VERSION_CODE >> 16) & 0xff,
2440 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2441 #ifdef SNAPSHOT
2442 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2443 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2444 #endif
2445
2446 /* register this driver with the USB subsystem */
2447 result = usb_register(&em28xx_usb_driver);
2448 if (result)
2449 em28xx_err(DRIVER_NAME
2450 " usb_register failed. Error number %d.\n", result);
2451
2452 return result;
2453 }
2454
2455 static void __exit em28xx_module_exit(void)
2456 {
2457 /* deregister this driver with the USB subsystem */
2458 usb_deregister(&em28xx_usb_driver);
2459 }
2460
2461 module_init(em28xx_module_init);
2462 module_exit(em28xx_module_exit);
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