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8996175cc95075bca9c42c89501a2adc51bd12fc
[deliverable/linux.git] / drivers / media / video / em28xx / em28xx-video.c
1 /*
2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
3 video capture devices
4
5 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
6 Markus Rechberger <mrechberger@gmail.com>
7 Mauro Carvalho Chehab <mchehab@infradead.org>
8 Sascha Sommer <saschasommer@freenet.de>
9
10 Some parts based on SN9C10x PC Camera Controllers GPL driver made
11 by Luca Risolia <luca.risolia@studio.unibo.it>
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28 #include <linux/init.h>
29 #include <linux/list.h>
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/bitmap.h>
33 #include <linux/usb.h>
34 #include <linux/i2c.h>
35 #include <linux/version.h>
36 #include <linux/mm.h>
37 #include <linux/mutex.h>
38
39 #include "em28xx.h"
40 #include <media/v4l2-common.h>
41 #include <media/msp3400.h>
42 #include <media/tuner.h>
43
44 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
45 "Markus Rechberger <mrechberger@gmail.com>, " \
46 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
47 "Sascha Sommer <saschasommer@freenet.de>"
48
49 #define DRIVER_NAME "em28xx"
50 #define DRIVER_DESC "Empia em28xx based USB video device driver"
51 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
52
53 #define em28xx_videodbg(fmt, arg...) do {\
54 if (video_debug) \
55 printk(KERN_INFO "%s %s :"fmt, \
56 dev->name, __func__ , ##arg); } while (0)
57
58 static unsigned int isoc_debug;
59 module_param(isoc_debug, int, 0644);
60 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
61
62 #define em28xx_isocdbg(fmt, arg...) \
63 do {\
64 if (isoc_debug) { \
65 printk(KERN_INFO "%s %s :"fmt, \
66 dev->name, __func__ , ##arg); \
67 } \
68 } while (0)
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 dev->isoc_ctl.buf = NULL;
141
142 list_del(&buf->vb.queue);
143 wake_up(&buf->vb.done);
144 }
145
146 /*
147 * Identify the buffer header type and properly handles
148 */
149 static void em28xx_copy_video(struct em28xx *dev,
150 struct em28xx_dmaqueue *dma_q,
151 struct em28xx_buffer *buf,
152 unsigned char *p,
153 unsigned char *outp, unsigned long len)
154 {
155 void *fieldstart, *startwrite, *startread;
156 int linesdone, currlinedone, offset, lencopy, remain;
157 int bytesperline = dev->width << 1;
158
159 if (dma_q->pos + len > buf->vb.size)
160 len = buf->vb.size - dma_q->pos;
161
162 if (p[0] != 0x88 && p[0] != 0x22) {
163 em28xx_isocdbg("frame is not complete\n");
164 len += 4;
165 } else
166 p += 4;
167
168 startread = p;
169 remain = len;
170
171 /* Interlaces frame */
172 if (buf->top_field)
173 fieldstart = outp;
174 else
175 fieldstart = outp + bytesperline;
176
177 linesdone = dma_q->pos / bytesperline;
178 currlinedone = dma_q->pos % bytesperline;
179 offset = linesdone * bytesperline * 2 + currlinedone;
180 startwrite = fieldstart + offset;
181 lencopy = bytesperline - currlinedone;
182 lencopy = lencopy > remain ? remain : lencopy;
183
184 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
185 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
186 ((char *)startwrite + lencopy) -
187 ((char *)outp + buf->vb.size));
188 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
189 }
190 if (lencopy <= 0)
191 return;
192 memcpy(startwrite, startread, lencopy);
193
194 remain -= lencopy;
195
196 while (remain > 0) {
197 startwrite += lencopy + bytesperline;
198 startread += lencopy;
199 if (bytesperline > remain)
200 lencopy = remain;
201 else
202 lencopy = bytesperline;
203
204 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
205 em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
206 ((char *)startwrite + lencopy) -
207 ((char *)outp + buf->vb.size));
208 lencopy = remain = (char *)outp + buf->vb.size -
209 (char *)startwrite;
210 }
211 if (lencopy <= 0)
212 break;
213
214 memcpy(startwrite, startread, lencopy);
215
216 remain -= lencopy;
217 }
218
219 dma_q->pos += len;
220 }
221
222 static inline void print_err_status(struct em28xx *dev,
223 int packet, int status)
224 {
225 char *errmsg = "Unknown";
226
227 switch (status) {
228 case -ENOENT:
229 errmsg = "unlinked synchronuously";
230 break;
231 case -ECONNRESET:
232 errmsg = "unlinked asynchronuously";
233 break;
234 case -ENOSR:
235 errmsg = "Buffer error (overrun)";
236 break;
237 case -EPIPE:
238 errmsg = "Stalled (device not responding)";
239 break;
240 case -EOVERFLOW:
241 errmsg = "Babble (bad cable?)";
242 break;
243 case -EPROTO:
244 errmsg = "Bit-stuff error (bad cable?)";
245 break;
246 case -EILSEQ:
247 errmsg = "CRC/Timeout (could be anything)";
248 break;
249 case -ETIME:
250 errmsg = "Device does not respond";
251 break;
252 }
253 if (packet < 0) {
254 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
255 } else {
256 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
257 packet, status, errmsg);
258 }
259 }
260
261 /*
262 * video-buf generic routine to get the next available buffer
263 */
264 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
265 struct em28xx_buffer **buf)
266 {
267 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
268 char *outp;
269
270 if (list_empty(&dma_q->active)) {
271 em28xx_isocdbg("No active queue to serve\n");
272 dev->isoc_ctl.buf = NULL;
273 *buf = NULL;
274 return;
275 }
276
277 /* Get the next buffer */
278 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
279
280 /* Cleans up buffer - Usefull for testing for frame/URB loss */
281 outp = videobuf_to_vmalloc(&(*buf)->vb);
282 memset(outp, 0, (*buf)->vb.size);
283
284 dev->isoc_ctl.buf = *buf;
285
286 return;
287 }
288
289 /*
290 * Controls the isoc copy of each urb packet
291 */
292 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
293 {
294 struct em28xx_buffer *buf;
295 struct em28xx_dmaqueue *dma_q = urb->context;
296 unsigned char *outp = NULL;
297 int i, len = 0, rc = 1;
298 unsigned char *p;
299
300 if (!dev)
301 return 0;
302
303 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
304 return 0;
305
306 if (urb->status < 0) {
307 print_err_status(dev, -1, urb->status);
308 if (urb->status == -ENOENT)
309 return 0;
310 }
311
312 buf = dev->isoc_ctl.buf;
313 if (buf != NULL)
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] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
343 em28xx_isocdbg("VBI HEADER!!!\n");
344 /* FIXME: Should add vbi copy */
345 continue;
346 }
347 if (p[0] == 0x22 && p[1] == 0x5a) {
348 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
349 len, (p[2] & 1)? "odd" : "even");
350
351 if (!(p[2] & 1)) {
352 if (buf != NULL)
353 buffer_filled(dev, dma_q, buf);
354 get_next_buf(dma_q, &buf);
355 if (buf == NULL)
356 outp = NULL;
357 else
358 outp = videobuf_to_vmalloc(&buf->vb);
359 }
360
361 if (buf != NULL) {
362 if (p[2] & 1)
363 buf->top_field = 0;
364 else
365 buf->top_field = 1;
366 }
367
368 dma_q->pos = 0;
369 }
370 if (buf != NULL)
371 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
372 }
373 return rc;
374 }
375
376 /* ------------------------------------------------------------------
377 Videobuf operations
378 ------------------------------------------------------------------*/
379
380 static int
381 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
382 {
383 struct em28xx_fh *fh = vq->priv_data;
384 struct em28xx *dev = fh->dev;
385 struct v4l2_frequency f;
386
387 *size = 16 * fh->dev->width * fh->dev->height >> 3;
388 if (0 == *count)
389 *count = EM28XX_DEF_BUF;
390
391 if (*count < EM28XX_MIN_BUF)
392 *count = EM28XX_MIN_BUF;
393
394 /* Ask tuner to go to analog mode */
395 memset(&f, 0, sizeof(f));
396 f.frequency = dev->ctl_freq;
397
398 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
399
400 return 0;
401 }
402
403 /* This is called *without* dev->slock held; please keep it that way */
404 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
405 {
406 struct em28xx_fh *fh = vq->priv_data;
407 struct em28xx *dev = fh->dev;
408 unsigned long flags = 0;
409 if (in_interrupt())
410 BUG();
411
412 /* We used to wait for the buffer to finish here, but this didn't work
413 because, as we were keeping the state as VIDEOBUF_QUEUED,
414 videobuf_queue_cancel marked it as finished for us.
415 (Also, it could wedge forever if the hardware was misconfigured.)
416
417 This should be safe; by the time we get here, the buffer isn't
418 queued anymore. If we ever start marking the buffers as
419 VIDEOBUF_ACTIVE, it won't be, though.
420 */
421 spin_lock_irqsave(&dev->slock, flags);
422 if (dev->isoc_ctl.buf == buf)
423 dev->isoc_ctl.buf = NULL;
424 spin_unlock_irqrestore(&dev->slock, flags);
425
426 videobuf_vmalloc_free(&buf->vb);
427 buf->vb.state = VIDEOBUF_NEEDS_INIT;
428 }
429
430 static int
431 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
432 enum v4l2_field field)
433 {
434 struct em28xx_fh *fh = vq->priv_data;
435 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
436 struct em28xx *dev = fh->dev;
437 int rc = 0, urb_init = 0;
438
439 /* FIXME: It assumes depth = 16 */
440 /* The only currently supported format is 16 bits/pixel */
441 buf->vb.size = 16 * dev->width * dev->height >> 3;
442
443 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
444 return -EINVAL;
445
446 buf->vb.width = dev->width;
447 buf->vb.height = dev->height;
448 buf->vb.field = field;
449
450 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
451 rc = videobuf_iolock(vq, &buf->vb, NULL);
452 if (rc < 0)
453 goto fail;
454 }
455
456 if (!dev->isoc_ctl.num_bufs)
457 urb_init = 1;
458
459 if (urb_init) {
460 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
461 EM28XX_NUM_BUFS, dev->max_pkt_size,
462 em28xx_isoc_copy);
463 if (rc < 0)
464 goto fail;
465 }
466
467 buf->vb.state = VIDEOBUF_PREPARED;
468 return 0;
469
470 fail:
471 free_buffer(vq, buf);
472 return rc;
473 }
474
475 static void
476 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
477 {
478 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
479 struct em28xx_fh *fh = vq->priv_data;
480 struct em28xx *dev = fh->dev;
481 struct em28xx_dmaqueue *vidq = &dev->vidq;
482
483 buf->vb.state = VIDEOBUF_QUEUED;
484 list_add_tail(&buf->vb.queue, &vidq->active);
485
486 }
487
488 static void buffer_release(struct videobuf_queue *vq,
489 struct videobuf_buffer *vb)
490 {
491 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
492 struct em28xx_fh *fh = vq->priv_data;
493 struct em28xx *dev = (struct em28xx *)fh->dev;
494
495 em28xx_isocdbg("em28xx: called buffer_release\n");
496
497 free_buffer(vq, buf);
498 }
499
500 static struct videobuf_queue_ops em28xx_video_qops = {
501 .buf_setup = buffer_setup,
502 .buf_prepare = buffer_prepare,
503 .buf_queue = buffer_queue,
504 .buf_release = buffer_release,
505 };
506
507 /********************* v4l2 interface **************************************/
508
509 /*
510 * em28xx_config()
511 * inits registers with sane defaults
512 */
513 static int em28xx_config(struct em28xx *dev)
514 {
515
516 /* Sets I2C speed to 100 KHz */
517 if (!dev->is_em2800)
518 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
519
520 /* enable vbi capturing */
521
522 /* em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
523 /* em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
524 em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1);
525
526 dev->mute = 1; /* maybe not the right place... */
527 dev->volume = 0x1f;
528
529 em28xx_outfmt_set_yuv422(dev);
530 em28xx_colorlevels_set_default(dev);
531 em28xx_compression_disable(dev);
532
533 return 0;
534 }
535
536 /*
537 * em28xx_config_i2c()
538 * configure i2c attached devices
539 */
540 static void em28xx_config_i2c(struct em28xx *dev)
541 {
542 struct v4l2_routing route;
543
544 route.input = INPUT(dev->ctl_input)->vmux;
545 route.output = 0;
546 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
547 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
548 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
549 }
550
551 static void video_mux(struct em28xx *dev, int index)
552 {
553 struct v4l2_routing route;
554
555 route.input = INPUT(index)->vmux;
556 route.output = 0;
557 dev->ctl_input = index;
558 dev->ctl_ainput = INPUT(index)->amux;
559
560 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
561
562 if (dev->has_msp34xx) {
563 if (dev->i2s_speed) {
564 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
565 &dev->i2s_speed);
566 }
567 route.input = dev->ctl_ainput;
568 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
569 /* Note: this is msp3400 specific */
570 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
571 &route);
572 }
573
574 em28xx_audio_analog_set(dev);
575 }
576
577 /* Usage lock check functions */
578 static int res_get(struct em28xx_fh *fh)
579 {
580 struct em28xx *dev = fh->dev;
581 int rc = 0;
582
583 /* This instance already has stream_on */
584 if (fh->stream_on)
585 return rc;
586
587 if (dev->stream_on)
588 return -EINVAL;
589
590 mutex_lock(&dev->lock);
591 dev->stream_on = 1;
592 fh->stream_on = 1;
593 mutex_unlock(&dev->lock);
594 return rc;
595 }
596
597 static int res_check(struct em28xx_fh *fh)
598 {
599 return (fh->stream_on);
600 }
601
602 static void res_free(struct em28xx_fh *fh)
603 {
604 struct em28xx *dev = fh->dev;
605
606 mutex_lock(&dev->lock);
607 fh->stream_on = 0;
608 dev->stream_on = 0;
609 mutex_unlock(&dev->lock);
610 }
611
612 /*
613 * em28xx_get_ctrl()
614 * return the current saturation, brightness or contrast, mute state
615 */
616 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
617 {
618 switch (ctrl->id) {
619 case V4L2_CID_AUDIO_MUTE:
620 ctrl->value = dev->mute;
621 return 0;
622 case V4L2_CID_AUDIO_VOLUME:
623 ctrl->value = dev->volume;
624 return 0;
625 default:
626 return -EINVAL;
627 }
628 }
629
630 /*
631 * em28xx_set_ctrl()
632 * mute or set new saturation, brightness or contrast
633 */
634 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
635 {
636 switch (ctrl->id) {
637 case V4L2_CID_AUDIO_MUTE:
638 if (ctrl->value != dev->mute) {
639 dev->mute = ctrl->value;
640 return em28xx_audio_analog_set(dev);
641 }
642 return 0;
643 case V4L2_CID_AUDIO_VOLUME:
644 dev->volume = ctrl->value;
645 return em28xx_audio_analog_set(dev);
646 default:
647 return -EINVAL;
648 }
649 }
650
651 static int check_dev(struct em28xx *dev)
652 {
653 if (dev->state & DEV_DISCONNECTED) {
654 em28xx_errdev("v4l2 ioctl: device not present\n");
655 return -ENODEV;
656 }
657
658 if (dev->state & DEV_MISCONFIGURED) {
659 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
660 "close and open it again\n");
661 return -EIO;
662 }
663 return 0;
664 }
665
666 static void get_scale(struct em28xx *dev,
667 unsigned int width, unsigned int height,
668 unsigned int *hscale, unsigned int *vscale)
669 {
670 unsigned int maxw = norm_maxw(dev);
671 unsigned int maxh = norm_maxh(dev);
672
673 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
674 if (*hscale >= 0x4000)
675 *hscale = 0x3fff;
676
677 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
678 if (*vscale >= 0x4000)
679 *vscale = 0x3fff;
680 }
681
682 /* ------------------------------------------------------------------
683 IOCTL vidioc handling
684 ------------------------------------------------------------------*/
685
686 static int vidioc_g_fmt_cap(struct file *file, void *priv,
687 struct v4l2_format *f)
688 {
689 struct em28xx_fh *fh = priv;
690 struct em28xx *dev = fh->dev;
691
692 mutex_lock(&dev->lock);
693
694 f->fmt.pix.width = dev->width;
695 f->fmt.pix.height = dev->height;
696 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
697 f->fmt.pix.bytesperline = dev->width * 2;
698 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
699 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
700
701 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
702 f->fmt.pix.field = dev->interlaced ?
703 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
704
705 mutex_unlock(&dev->lock);
706 return 0;
707 }
708
709 static int vidioc_try_fmt_cap(struct file *file, void *priv,
710 struct v4l2_format *f)
711 {
712 struct em28xx_fh *fh = priv;
713 struct em28xx *dev = fh->dev;
714 int width = f->fmt.pix.width;
715 int height = f->fmt.pix.height;
716 unsigned int maxw = norm_maxw(dev);
717 unsigned int maxh = norm_maxh(dev);
718 unsigned int hscale, vscale;
719
720 /* width must even because of the YUYV format
721 height must be even because of interlacing */
722 height &= 0xfffe;
723 width &= 0xfffe;
724
725 if (height < 32)
726 height = 32;
727 if (height > maxh)
728 height = maxh;
729 if (width < 48)
730 width = 48;
731 if (width > maxw)
732 width = maxw;
733
734 mutex_lock(&dev->lock);
735
736 if (dev->is_em2800) {
737 /* the em2800 can only scale down to 50% */
738 if (height % (maxh / 2))
739 height = maxh;
740 if (width % (maxw / 2))
741 width = maxw;
742 /* according to empiatech support */
743 /* the MaxPacketSize is to small to support */
744 /* framesizes larger than 640x480 @ 30 fps */
745 /* or 640x576 @ 25 fps. As this would cut */
746 /* of a part of the image we prefer */
747 /* 360x576 or 360x480 for now */
748 if (width == maxw && height == maxh)
749 width /= 2;
750 }
751
752 get_scale(dev, width, height, &hscale, &vscale);
753
754 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
755 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
756
757 f->fmt.pix.width = width;
758 f->fmt.pix.height = height;
759 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
760 f->fmt.pix.bytesperline = width * 2;
761 f->fmt.pix.sizeimage = width * 2 * height;
762 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
763 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
764
765 mutex_unlock(&dev->lock);
766 return 0;
767 }
768
769 static int vidioc_s_fmt_cap(struct file *file, void *priv,
770 struct v4l2_format *f)
771 {
772 struct em28xx_fh *fh = priv;
773 struct em28xx *dev = fh->dev;
774 int rc;
775
776 rc = check_dev(dev);
777 if (rc < 0)
778 return rc;
779
780 vidioc_try_fmt_cap(file, priv, f);
781
782 mutex_lock(&dev->lock);
783
784 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
785 em28xx_errdev("%s queue busy\n", __func__);
786 rc = -EBUSY;
787 goto out;
788 }
789
790 if (dev->stream_on && !fh->stream_on) {
791 em28xx_errdev("%s device in use by another fh\n", __func__);
792 rc = -EBUSY;
793 goto out;
794 }
795
796 /* set new image size */
797 dev->width = f->fmt.pix.width;
798 dev->height = f->fmt.pix.height;
799 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
800
801 em28xx_set_alternate(dev);
802 em28xx_resolution_set(dev);
803
804 rc = 0;
805
806 out:
807 mutex_unlock(&dev->lock);
808 return rc;
809 }
810
811 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
812 {
813 struct em28xx_fh *fh = priv;
814 struct em28xx *dev = fh->dev;
815 struct v4l2_format f;
816 int rc;
817
818 rc = check_dev(dev);
819 if (rc < 0)
820 return rc;
821
822 mutex_lock(&dev->lock);
823 dev->norm = *norm;
824 mutex_unlock(&dev->lock);
825
826 /* Adjusts width/height, if needed */
827 f.fmt.pix.width = dev->width;
828 f.fmt.pix.height = dev->height;
829 vidioc_try_fmt_cap(file, priv, &f);
830
831 mutex_lock(&dev->lock);
832
833 /* set new image size */
834 dev->width = f.fmt.pix.width;
835 dev->height = f.fmt.pix.height;
836 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
837
838 em28xx_resolution_set(dev);
839 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
840
841 mutex_unlock(&dev->lock);
842 return 0;
843 }
844
845 static const char *iname[] = {
846 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
847 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
848 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
849 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
850 [EM28XX_VMUX_SVIDEO] = "S-Video",
851 [EM28XX_VMUX_TELEVISION] = "Television",
852 [EM28XX_VMUX_CABLE] = "Cable TV",
853 [EM28XX_VMUX_DVB] = "DVB",
854 [EM28XX_VMUX_DEBUG] = "for debug only",
855 };
856
857 static int vidioc_enum_input(struct file *file, void *priv,
858 struct v4l2_input *i)
859 {
860 struct em28xx_fh *fh = priv;
861 struct em28xx *dev = fh->dev;
862 unsigned int n;
863
864 n = i->index;
865 if (n >= MAX_EM28XX_INPUT)
866 return -EINVAL;
867 if (0 == INPUT(n)->type)
868 return -EINVAL;
869
870 i->index = n;
871 i->type = V4L2_INPUT_TYPE_CAMERA;
872
873 strcpy(i->name, iname[INPUT(n)->type]);
874
875 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
876 (EM28XX_VMUX_CABLE == INPUT(n)->type))
877 i->type = V4L2_INPUT_TYPE_TUNER;
878
879 i->std = dev->vdev->tvnorms;
880
881 return 0;
882 }
883
884 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
885 {
886 struct em28xx_fh *fh = priv;
887 struct em28xx *dev = fh->dev;
888
889 *i = dev->ctl_input;
890
891 return 0;
892 }
893
894 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
895 {
896 struct em28xx_fh *fh = priv;
897 struct em28xx *dev = fh->dev;
898 int rc;
899
900 rc = check_dev(dev);
901 if (rc < 0)
902 return rc;
903
904 if (i >= MAX_EM28XX_INPUT)
905 return -EINVAL;
906 if (0 == INPUT(i)->type)
907 return -EINVAL;
908
909 mutex_lock(&dev->lock);
910
911 video_mux(dev, i);
912
913 mutex_unlock(&dev->lock);
914 return 0;
915 }
916
917 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
918 {
919 struct em28xx_fh *fh = priv;
920 struct em28xx *dev = fh->dev;
921 unsigned int index = a->index;
922
923 if (a->index > 1)
924 return -EINVAL;
925
926 index = dev->ctl_ainput;
927
928 if (index == 0)
929 strcpy(a->name, "Television");
930 else
931 strcpy(a->name, "Line In");
932
933 a->capability = V4L2_AUDCAP_STEREO;
934 a->index = index;
935
936 return 0;
937 }
938
939 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
940 {
941 struct em28xx_fh *fh = priv;
942 struct em28xx *dev = fh->dev;
943
944 if (a->index != dev->ctl_ainput)
945 return -EINVAL;
946
947 return 0;
948 }
949
950 static int vidioc_queryctrl(struct file *file, void *priv,
951 struct v4l2_queryctrl *qc)
952 {
953 struct em28xx_fh *fh = priv;
954 struct em28xx *dev = fh->dev;
955 int id = qc->id;
956 int i;
957 int rc;
958
959 rc = check_dev(dev);
960 if (rc < 0)
961 return rc;
962
963 memset(qc, 0, sizeof(*qc));
964
965 qc->id = id;
966
967 if (!dev->has_msp34xx) {
968 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
969 if (qc->id && qc->id == em28xx_qctrl[i].id) {
970 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
971 return 0;
972 }
973 }
974 }
975 mutex_lock(&dev->lock);
976 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
977 mutex_unlock(&dev->lock);
978
979 if (qc->type)
980 return 0;
981 else
982 return -EINVAL;
983 }
984
985 static int vidioc_g_ctrl(struct file *file, void *priv,
986 struct v4l2_control *ctrl)
987 {
988 struct em28xx_fh *fh = priv;
989 struct em28xx *dev = fh->dev;
990 int rc;
991
992 rc = check_dev(dev);
993 if (rc < 0)
994 return rc;
995 mutex_lock(&dev->lock);
996
997 if (!dev->has_msp34xx)
998 rc = em28xx_get_ctrl(dev, ctrl);
999 else
1000 rc = -EINVAL;
1001
1002 if (rc == -EINVAL) {
1003 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1004 rc = 0;
1005 }
1006
1007 mutex_unlock(&dev->lock);
1008 return rc;
1009 }
1010
1011 static int vidioc_s_ctrl(struct file *file, void *priv,
1012 struct v4l2_control *ctrl)
1013 {
1014 struct em28xx_fh *fh = priv;
1015 struct em28xx *dev = fh->dev;
1016 u8 i;
1017 int rc;
1018
1019 rc = check_dev(dev);
1020 if (rc < 0)
1021 return rc;
1022
1023 mutex_lock(&dev->lock);
1024
1025 if (dev->has_msp34xx)
1026 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1027 else {
1028 rc = 1;
1029 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1030 if (ctrl->id == em28xx_qctrl[i].id) {
1031 if (ctrl->value < em28xx_qctrl[i].minimum ||
1032 ctrl->value > em28xx_qctrl[i].maximum) {
1033 rc = -ERANGE;
1034 break;
1035 }
1036
1037 rc = em28xx_set_ctrl(dev, ctrl);
1038 break;
1039 }
1040 }
1041 }
1042
1043 /* Control not found - try to send it to the attached devices */
1044 if (rc == 1) {
1045 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1046 rc = 0;
1047 }
1048
1049 mutex_unlock(&dev->lock);
1050 return rc;
1051 }
1052
1053 static int vidioc_g_tuner(struct file *file, void *priv,
1054 struct v4l2_tuner *t)
1055 {
1056 struct em28xx_fh *fh = priv;
1057 struct em28xx *dev = fh->dev;
1058 int rc;
1059
1060 rc = check_dev(dev);
1061 if (rc < 0)
1062 return rc;
1063
1064 if (0 != t->index)
1065 return -EINVAL;
1066
1067 strcpy(t->name, "Tuner");
1068
1069 mutex_lock(&dev->lock);
1070
1071 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1072
1073 mutex_unlock(&dev->lock);
1074 return 0;
1075 }
1076
1077 static int vidioc_s_tuner(struct file *file, void *priv,
1078 struct v4l2_tuner *t)
1079 {
1080 struct em28xx_fh *fh = priv;
1081 struct em28xx *dev = fh->dev;
1082 int rc;
1083
1084 rc = check_dev(dev);
1085 if (rc < 0)
1086 return rc;
1087
1088 if (0 != t->index)
1089 return -EINVAL;
1090
1091 mutex_lock(&dev->lock);
1092
1093 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1094
1095 mutex_unlock(&dev->lock);
1096 return 0;
1097 }
1098
1099 static int vidioc_g_frequency(struct file *file, void *priv,
1100 struct v4l2_frequency *f)
1101 {
1102 struct em28xx_fh *fh = priv;
1103 struct em28xx *dev = fh->dev;
1104
1105 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1106 f->frequency = dev->ctl_freq;
1107
1108 return 0;
1109 }
1110
1111 static int vidioc_s_frequency(struct file *file, void *priv,
1112 struct v4l2_frequency *f)
1113 {
1114 struct em28xx_fh *fh = priv;
1115 struct em28xx *dev = fh->dev;
1116 int rc;
1117
1118 rc = check_dev(dev);
1119 if (rc < 0)
1120 return rc;
1121
1122 if (0 != f->tuner)
1123 return -EINVAL;
1124
1125 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1126 return -EINVAL;
1127 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1128 return -EINVAL;
1129
1130 mutex_lock(&dev->lock);
1131
1132 dev->ctl_freq = f->frequency;
1133 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1134
1135 mutex_unlock(&dev->lock);
1136 return 0;
1137 }
1138
1139 #ifdef CONFIG_VIDEO_ADV_DEBUG
1140 static int em28xx_reg_len(int reg)
1141 {
1142 switch (reg) {
1143 case EM28XX_R40_AC97LSB:
1144 case EM28XX_R30_HSCALELOW:
1145 case EM28XX_R32_VSCALELOW:
1146 return 2;
1147 default:
1148 return 1;
1149 }
1150 }
1151
1152 static int vidioc_g_register(struct file *file, void *priv,
1153 struct v4l2_register *reg)
1154 {
1155 struct em28xx_fh *fh = priv;
1156 struct em28xx *dev = fh->dev;
1157 int ret;
1158
1159 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1160 return -EINVAL;
1161
1162 if (em28xx_reg_len(reg->reg) == 1) {
1163 ret = em28xx_read_reg(dev, reg->reg);
1164 if (ret < 0)
1165 return ret;
1166
1167 reg->val = ret;
1168 } else {
1169 u64 val = 0;
1170 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1171 reg->reg, (char *)&val, 2);
1172 if (ret < 0)
1173 return ret;
1174
1175 reg->val = cpu_to_le64((__u64)val);
1176 }
1177
1178 return 0;
1179 }
1180
1181 static int vidioc_s_register(struct file *file, void *priv,
1182 struct v4l2_register *reg)
1183 {
1184 struct em28xx_fh *fh = priv;
1185 struct em28xx *dev = fh->dev;
1186 u64 buf;
1187
1188 buf = le64_to_cpu((__u64)reg->val);
1189
1190 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1191 em28xx_reg_len(reg->reg));
1192 }
1193 #endif
1194
1195
1196 static int vidioc_cropcap(struct file *file, void *priv,
1197 struct v4l2_cropcap *cc)
1198 {
1199 struct em28xx_fh *fh = priv;
1200 struct em28xx *dev = fh->dev;
1201
1202 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1203 return -EINVAL;
1204
1205 cc->bounds.left = 0;
1206 cc->bounds.top = 0;
1207 cc->bounds.width = dev->width;
1208 cc->bounds.height = dev->height;
1209 cc->defrect = cc->bounds;
1210 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1211 cc->pixelaspect.denominator = 59;
1212
1213 return 0;
1214 }
1215
1216 static int vidioc_streamon(struct file *file, void *priv,
1217 enum v4l2_buf_type type)
1218 {
1219 struct em28xx_fh *fh = priv;
1220 struct em28xx *dev = fh->dev;
1221 int rc;
1222
1223 rc = check_dev(dev);
1224 if (rc < 0)
1225 return rc;
1226
1227
1228 if (unlikely(res_get(fh) < 0))
1229 return -EBUSY;
1230
1231 return (videobuf_streamon(&fh->vb_vidq));
1232 }
1233
1234 static int vidioc_streamoff(struct file *file, void *priv,
1235 enum v4l2_buf_type type)
1236 {
1237 struct em28xx_fh *fh = priv;
1238 struct em28xx *dev = fh->dev;
1239 int rc;
1240
1241 rc = check_dev(dev);
1242 if (rc < 0)
1243 return rc;
1244
1245 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1246 return -EINVAL;
1247 if (type != fh->type)
1248 return -EINVAL;
1249
1250 videobuf_streamoff(&fh->vb_vidq);
1251 res_free(fh);
1252
1253 return 0;
1254 }
1255
1256 static int vidioc_querycap(struct file *file, void *priv,
1257 struct v4l2_capability *cap)
1258 {
1259 struct em28xx_fh *fh = priv;
1260 struct em28xx *dev = fh->dev;
1261
1262 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1263 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1264 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1265
1266 cap->version = EM28XX_VERSION_CODE;
1267
1268 cap->capabilities =
1269 V4L2_CAP_SLICED_VBI_CAPTURE |
1270 V4L2_CAP_VIDEO_CAPTURE |
1271 V4L2_CAP_AUDIO |
1272 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1273
1274 if (dev->tuner_type != TUNER_ABSENT)
1275 cap->capabilities |= V4L2_CAP_TUNER;
1276
1277 return 0;
1278 }
1279
1280 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
1281 struct v4l2_fmtdesc *fmtd)
1282 {
1283 if (fmtd->index != 0)
1284 return -EINVAL;
1285
1286 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1287 strcpy(fmtd->description, "Packed YUY2");
1288 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1289 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1290
1291 return 0;
1292 }
1293
1294 /* Sliced VBI ioctls */
1295 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1296 struct v4l2_format *f)
1297 {
1298 struct em28xx_fh *fh = priv;
1299 struct em28xx *dev = fh->dev;
1300 int rc;
1301
1302 rc = check_dev(dev);
1303 if (rc < 0)
1304 return rc;
1305
1306 mutex_lock(&dev->lock);
1307
1308 f->fmt.sliced.service_set = 0;
1309
1310 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1311
1312 if (f->fmt.sliced.service_set == 0)
1313 rc = -EINVAL;
1314
1315 mutex_unlock(&dev->lock);
1316 return rc;
1317 }
1318
1319 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1320 struct v4l2_format *f)
1321 {
1322 struct em28xx_fh *fh = priv;
1323 struct em28xx *dev = fh->dev;
1324 int rc;
1325
1326 rc = check_dev(dev);
1327 if (rc < 0)
1328 return rc;
1329
1330 mutex_lock(&dev->lock);
1331 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1332 mutex_unlock(&dev->lock);
1333
1334 if (f->fmt.sliced.service_set == 0)
1335 return -EINVAL;
1336
1337 return 0;
1338 }
1339
1340
1341 static int vidioc_reqbufs(struct file *file, void *priv,
1342 struct v4l2_requestbuffers *rb)
1343 {
1344 struct em28xx_fh *fh = priv;
1345 struct em28xx *dev = fh->dev;
1346 int rc;
1347
1348 rc = check_dev(dev);
1349 if (rc < 0)
1350 return rc;
1351
1352 return (videobuf_reqbufs(&fh->vb_vidq, rb));
1353 }
1354
1355 static int vidioc_querybuf(struct file *file, void *priv,
1356 struct v4l2_buffer *b)
1357 {
1358 struct em28xx_fh *fh = priv;
1359 struct em28xx *dev = fh->dev;
1360 int rc;
1361
1362 rc = check_dev(dev);
1363 if (rc < 0)
1364 return rc;
1365
1366 return (videobuf_querybuf(&fh->vb_vidq, b));
1367 }
1368
1369 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1370 {
1371 struct em28xx_fh *fh = priv;
1372 struct em28xx *dev = fh->dev;
1373 int rc;
1374
1375 rc = check_dev(dev);
1376 if (rc < 0)
1377 return rc;
1378
1379 return (videobuf_qbuf(&fh->vb_vidq, b));
1380 }
1381
1382 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1383 {
1384 struct em28xx_fh *fh = priv;
1385 struct em28xx *dev = fh->dev;
1386 int rc;
1387
1388 rc = check_dev(dev);
1389 if (rc < 0)
1390 return rc;
1391
1392 return (videobuf_dqbuf(&fh->vb_vidq, b,
1393 file->f_flags & O_NONBLOCK));
1394 }
1395
1396 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1397 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1398 {
1399 struct em28xx_fh *fh = priv;
1400
1401 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1402 }
1403 #endif
1404
1405
1406 /* ----------------------------------------------------------- */
1407 /* RADIO ESPECIFIC IOCTLS */
1408 /* ----------------------------------------------------------- */
1409
1410 static int radio_querycap(struct file *file, void *priv,
1411 struct v4l2_capability *cap)
1412 {
1413 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1414
1415 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1416 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1417 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1418
1419 cap->version = EM28XX_VERSION_CODE;
1420 cap->capabilities = V4L2_CAP_TUNER;
1421 return 0;
1422 }
1423
1424 static int radio_g_tuner(struct file *file, void *priv,
1425 struct v4l2_tuner *t)
1426 {
1427 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1428
1429 if (unlikely(t->index > 0))
1430 return -EINVAL;
1431
1432 strcpy(t->name, "Radio");
1433 t->type = V4L2_TUNER_RADIO;
1434
1435 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1436 return 0;
1437 }
1438
1439 static int radio_enum_input(struct file *file, void *priv,
1440 struct v4l2_input *i)
1441 {
1442 if (i->index != 0)
1443 return -EINVAL;
1444 strcpy(i->name, "Radio");
1445 i->type = V4L2_INPUT_TYPE_TUNER;
1446
1447 return 0;
1448 }
1449
1450 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1451 {
1452 if (unlikely(a->index))
1453 return -EINVAL;
1454
1455 strcpy(a->name, "Radio");
1456 return 0;
1457 }
1458
1459 static int radio_s_tuner(struct file *file, void *priv,
1460 struct v4l2_tuner *t)
1461 {
1462 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1463
1464 if (0 != t->index)
1465 return -EINVAL;
1466
1467 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1468
1469 return 0;
1470 }
1471
1472 static int radio_s_audio(struct file *file, void *fh,
1473 struct v4l2_audio *a)
1474 {
1475 return 0;
1476 }
1477
1478 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1479 {
1480 return 0;
1481 }
1482
1483 static int radio_queryctrl(struct file *file, void *priv,
1484 struct v4l2_queryctrl *qc)
1485 {
1486 int i;
1487
1488 if (qc->id < V4L2_CID_BASE ||
1489 qc->id >= V4L2_CID_LASTP1)
1490 return -EINVAL;
1491
1492 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1493 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1494 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1495 return 0;
1496 }
1497 }
1498
1499 return -EINVAL;
1500 }
1501
1502 /*
1503 * em28xx_v4l2_open()
1504 * inits the device and starts isoc transfer
1505 */
1506 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1507 {
1508 int minor = iminor(inode);
1509 int errCode = 0, radio = 0;
1510 struct em28xx *h, *dev = NULL;
1511 struct em28xx_fh *fh;
1512 enum v4l2_buf_type fh_type = 0;
1513
1514 list_for_each_entry(h, &em28xx_devlist, devlist) {
1515 if (h->vdev->minor == minor) {
1516 dev = h;
1517 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1518 }
1519 if (h->vbi_dev->minor == minor) {
1520 dev = h;
1521 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1522 }
1523 if (h->radio_dev &&
1524 h->radio_dev->minor == minor) {
1525 radio = 1;
1526 dev = h;
1527 }
1528 }
1529 if (NULL == dev)
1530 return -ENODEV;
1531
1532 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1533 minor, v4l2_type_names[fh_type], dev->users);
1534
1535
1536 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1537 if (!fh) {
1538 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1539 return -ENOMEM;
1540 }
1541 mutex_lock(&dev->lock);
1542 fh->dev = dev;
1543 fh->radio = radio;
1544 fh->type = fh_type;
1545 filp->private_data = fh;
1546
1547 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1548 dev->width = norm_maxw(dev);
1549 dev->height = norm_maxh(dev);
1550 dev->hscale = 0;
1551 dev->vscale = 0;
1552
1553 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1554 em28xx_set_alternate(dev);
1555 em28xx_resolution_set(dev);
1556
1557 /* Needed, since GPIO might have disabled power of
1558 some i2c device
1559 */
1560 em28xx_config_i2c(dev);
1561
1562 }
1563 if (fh->radio) {
1564 em28xx_videodbg("video_open: setting radio device\n");
1565 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1566 }
1567
1568 dev->users++;
1569
1570 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1571 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1572 sizeof(struct em28xx_buffer), fh);
1573
1574 mutex_unlock(&dev->lock);
1575
1576 return errCode;
1577 }
1578
1579 /*
1580 * em28xx_realease_resources()
1581 * unregisters the v4l2,i2c and usb devices
1582 * called when the device gets disconected or at module unload
1583 */
1584 static void em28xx_release_resources(struct em28xx *dev)
1585 {
1586
1587 /*FIXME: I2C IR should be disconnected */
1588
1589 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1590 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1591 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1592 list_del(&dev->devlist);
1593 if (dev->radio_dev) {
1594 if (-1 != dev->radio_dev->minor)
1595 video_unregister_device(dev->radio_dev);
1596 else
1597 video_device_release(dev->radio_dev);
1598 dev->radio_dev = NULL;
1599 }
1600 if (dev->vbi_dev) {
1601 if (-1 != dev->vbi_dev->minor)
1602 video_unregister_device(dev->vbi_dev);
1603 else
1604 video_device_release(dev->vbi_dev);
1605 dev->vbi_dev = NULL;
1606 }
1607 if (dev->vdev) {
1608 if (-1 != dev->vdev->minor)
1609 video_unregister_device(dev->vdev);
1610 else
1611 video_device_release(dev->vdev);
1612 dev->vdev = NULL;
1613 }
1614 em28xx_i2c_unregister(dev);
1615 usb_put_dev(dev->udev);
1616
1617 /* Mark device as unused */
1618 em28xx_devused &= ~(1<<dev->devno);
1619 }
1620
1621 /*
1622 * em28xx_v4l2_close()
1623 * stops streaming and deallocates all resources allocated by the v4l2
1624 * calls and ioctls
1625 */
1626 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1627 {
1628 struct em28xx_fh *fh = filp->private_data;
1629 struct em28xx *dev = fh->dev;
1630 int errCode;
1631
1632 em28xx_videodbg("users=%d\n", dev->users);
1633
1634
1635 if (res_check(fh))
1636 res_free(fh);
1637
1638 mutex_lock(&dev->lock);
1639
1640 if (dev->users == 1) {
1641 videobuf_stop(&fh->vb_vidq);
1642 videobuf_mmap_free(&fh->vb_vidq);
1643
1644 /* the device is already disconnect,
1645 free the remaining resources */
1646 if (dev->state & DEV_DISCONNECTED) {
1647 em28xx_release_resources(dev);
1648 mutex_unlock(&dev->lock);
1649 kfree(dev);
1650 return 0;
1651 }
1652
1653 /* do this before setting alternate! */
1654 em28xx_uninit_isoc(dev);
1655 em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
1656
1657 /* set alternate 0 */
1658 dev->alt = 0;
1659 em28xx_videodbg("setting alternate 0\n");
1660 errCode = usb_set_interface(dev->udev, 0, 0);
1661 if (errCode < 0) {
1662 em28xx_errdev("cannot change alternate number to "
1663 "0 (error=%i)\n", errCode);
1664 }
1665 }
1666 kfree(fh);
1667 dev->users--;
1668 wake_up_interruptible_nr(&dev->open, 1);
1669 mutex_unlock(&dev->lock);
1670 return 0;
1671 }
1672
1673 /*
1674 * em28xx_v4l2_read()
1675 * will allocate buffers when called for the first time
1676 */
1677 static ssize_t
1678 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1679 loff_t *pos)
1680 {
1681 struct em28xx_fh *fh = filp->private_data;
1682 struct em28xx *dev = fh->dev;
1683 int rc;
1684
1685 rc = check_dev(dev);
1686 if (rc < 0)
1687 return rc;
1688
1689 /* FIXME: read() is not prepared to allow changing the video
1690 resolution while streaming. Seems a bug at em28xx_set_fmt
1691 */
1692
1693 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1694 if (unlikely(res_get(fh)))
1695 return -EBUSY;
1696
1697 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1698 filp->f_flags & O_NONBLOCK);
1699 }
1700 return 0;
1701 }
1702
1703 /*
1704 * em28xx_v4l2_poll()
1705 * will allocate buffers when called for the first time
1706 */
1707 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1708 {
1709 struct em28xx_fh *fh = filp->private_data;
1710 struct em28xx *dev = fh->dev;
1711 int rc;
1712
1713 rc = check_dev(dev);
1714 if (rc < 0)
1715 return rc;
1716
1717 if (unlikely(res_get(fh) < 0))
1718 return POLLERR;
1719
1720 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1721 return POLLERR;
1722
1723 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1724 }
1725
1726 /*
1727 * em28xx_v4l2_mmap()
1728 */
1729 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1730 {
1731 struct em28xx_fh *fh = filp->private_data;
1732 struct em28xx *dev = fh->dev;
1733 int rc;
1734
1735 if (unlikely(res_get(fh) < 0))
1736 return -EBUSY;
1737
1738 rc = check_dev(dev);
1739 if (rc < 0)
1740 return rc;
1741
1742 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1743
1744 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1745 (unsigned long)vma->vm_start,
1746 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1747 rc);
1748
1749 return rc;
1750 }
1751
1752 static const struct file_operations em28xx_v4l_fops = {
1753 .owner = THIS_MODULE,
1754 .open = em28xx_v4l2_open,
1755 .release = em28xx_v4l2_close,
1756 .read = em28xx_v4l2_read,
1757 .poll = em28xx_v4l2_poll,
1758 .mmap = em28xx_v4l2_mmap,
1759 .ioctl = video_ioctl2,
1760 .llseek = no_llseek,
1761 .compat_ioctl = v4l_compat_ioctl32,
1762 };
1763
1764 static const struct file_operations radio_fops = {
1765 .owner = THIS_MODULE,
1766 .open = em28xx_v4l2_open,
1767 .release = em28xx_v4l2_close,
1768 .ioctl = video_ioctl2,
1769 .compat_ioctl = v4l_compat_ioctl32,
1770 .llseek = no_llseek,
1771 };
1772
1773 static const struct video_device em28xx_video_template = {
1774 .fops = &em28xx_v4l_fops,
1775 .release = video_device_release,
1776
1777 .minor = -1,
1778 .vidioc_querycap = vidioc_querycap,
1779 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1780 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1781 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1782 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1783 .vidioc_g_audio = vidioc_g_audio,
1784 .vidioc_s_audio = vidioc_s_audio,
1785 .vidioc_cropcap = vidioc_cropcap,
1786
1787 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1788 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1789 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1790
1791 .vidioc_reqbufs = vidioc_reqbufs,
1792 .vidioc_querybuf = vidioc_querybuf,
1793 .vidioc_qbuf = vidioc_qbuf,
1794 .vidioc_dqbuf = vidioc_dqbuf,
1795 .vidioc_s_std = vidioc_s_std,
1796 .vidioc_enum_input = vidioc_enum_input,
1797 .vidioc_g_input = vidioc_g_input,
1798 .vidioc_s_input = vidioc_s_input,
1799 .vidioc_queryctrl = vidioc_queryctrl,
1800 .vidioc_g_ctrl = vidioc_g_ctrl,
1801 .vidioc_s_ctrl = vidioc_s_ctrl,
1802 .vidioc_streamon = vidioc_streamon,
1803 .vidioc_streamoff = vidioc_streamoff,
1804 .vidioc_g_tuner = vidioc_g_tuner,
1805 .vidioc_s_tuner = vidioc_s_tuner,
1806 .vidioc_g_frequency = vidioc_g_frequency,
1807 .vidioc_s_frequency = vidioc_s_frequency,
1808 #ifdef CONFIG_VIDEO_ADV_DEBUG
1809 .vidioc_g_register = vidioc_g_register,
1810 .vidioc_s_register = vidioc_s_register,
1811 #endif
1812 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1813 .vidiocgmbuf = vidiocgmbuf,
1814 #endif
1815
1816 .tvnorms = V4L2_STD_ALL,
1817 .current_norm = V4L2_STD_PAL,
1818 };
1819
1820 static struct video_device em28xx_radio_template = {
1821 .name = "em28xx-radio",
1822 .type = VID_TYPE_TUNER,
1823 .fops = &radio_fops,
1824 .minor = -1,
1825 .vidioc_querycap = radio_querycap,
1826 .vidioc_g_tuner = radio_g_tuner,
1827 .vidioc_enum_input = radio_enum_input,
1828 .vidioc_g_audio = radio_g_audio,
1829 .vidioc_s_tuner = radio_s_tuner,
1830 .vidioc_s_audio = radio_s_audio,
1831 .vidioc_s_input = radio_s_input,
1832 .vidioc_queryctrl = radio_queryctrl,
1833 .vidioc_g_ctrl = vidioc_g_ctrl,
1834 .vidioc_s_ctrl = vidioc_s_ctrl,
1835 .vidioc_g_frequency = vidioc_g_frequency,
1836 .vidioc_s_frequency = vidioc_s_frequency,
1837 #ifdef CONFIG_VIDEO_ADV_DEBUG
1838 .vidioc_g_register = vidioc_g_register,
1839 .vidioc_s_register = vidioc_s_register,
1840 #endif
1841 };
1842
1843 /******************************** usb interface ******************************/
1844
1845
1846 static LIST_HEAD(em28xx_extension_devlist);
1847 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1848
1849 int em28xx_register_extension(struct em28xx_ops *ops)
1850 {
1851 struct em28xx *h, *dev = NULL;
1852
1853 list_for_each_entry(h, &em28xx_devlist, devlist)
1854 dev = h;
1855
1856 mutex_lock(&em28xx_extension_devlist_lock);
1857 list_add_tail(&ops->next, &em28xx_extension_devlist);
1858 if (dev)
1859 ops->init(dev);
1860
1861 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1862 mutex_unlock(&em28xx_extension_devlist_lock);
1863
1864 return 0;
1865 }
1866 EXPORT_SYMBOL(em28xx_register_extension);
1867
1868 void em28xx_unregister_extension(struct em28xx_ops *ops)
1869 {
1870 struct em28xx *h, *dev = NULL;
1871
1872 list_for_each_entry(h, &em28xx_devlist, devlist)
1873 dev = h;
1874
1875 if (dev)
1876 ops->fini(dev);
1877
1878 mutex_lock(&em28xx_extension_devlist_lock);
1879 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1880 list_del(&ops->next);
1881 mutex_unlock(&em28xx_extension_devlist_lock);
1882 }
1883 EXPORT_SYMBOL(em28xx_unregister_extension);
1884
1885 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1886 const struct video_device *template,
1887 const int type,
1888 const char *type_name)
1889 {
1890 struct video_device *vfd;
1891
1892 vfd = video_device_alloc();
1893 if (NULL == vfd)
1894 return NULL;
1895 *vfd = *template;
1896 vfd->minor = -1;
1897 vfd->dev = &dev->udev->dev;
1898 vfd->release = video_device_release;
1899 vfd->type = type;
1900 vfd->debug = video_debug;
1901
1902 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1903 dev->name, type_name);
1904
1905 return vfd;
1906 }
1907
1908
1909 /*
1910 * em28xx_init_dev()
1911 * allocates and inits the device structs, registers i2c bus and v4l device
1912 */
1913 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1914 int minor)
1915 {
1916 struct em28xx_ops *ops = NULL;
1917 struct em28xx *dev = *devhandle;
1918 int retval = -ENOMEM;
1919 int errCode;
1920 unsigned int maxh, maxw;
1921
1922 dev->udev = udev;
1923 mutex_init(&dev->lock);
1924 spin_lock_init(&dev->slock);
1925 init_waitqueue_head(&dev->open);
1926 init_waitqueue_head(&dev->wait_frame);
1927 init_waitqueue_head(&dev->wait_stream);
1928
1929 dev->em28xx_write_regs = em28xx_write_regs;
1930 dev->em28xx_read_reg = em28xx_read_reg;
1931 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1932 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1933 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1934 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1935
1936 em28xx_pre_card_setup(dev);
1937
1938 errCode = em28xx_config(dev);
1939 if (errCode) {
1940 em28xx_errdev("error configuring device\n");
1941 em28xx_devused &= ~(1<<dev->devno);
1942 kfree(dev);
1943 return -ENOMEM;
1944 }
1945
1946 /* register i2c bus */
1947 em28xx_i2c_register(dev);
1948
1949 /* Do board specific init and eeprom reading */
1950 em28xx_card_setup(dev);
1951
1952 /* Configure audio */
1953 em28xx_audio_analog_set(dev);
1954
1955 /* configure the device */
1956 em28xx_config_i2c(dev);
1957
1958 /* set default norm */
1959 dev->norm = em28xx_video_template.current_norm;
1960
1961 maxw = norm_maxw(dev);
1962 maxh = norm_maxh(dev);
1963
1964 /* set default image size */
1965 dev->width = maxw;
1966 dev->height = maxh;
1967 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1968 dev->hscale = 0;
1969 dev->vscale = 0;
1970 dev->ctl_input = 2;
1971
1972 errCode = em28xx_config(dev);
1973
1974 list_add_tail(&dev->devlist, &em28xx_devlist);
1975
1976 /* allocate and fill video video_device struct */
1977 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1978 VID_TYPE_CAPTURE, "video");
1979 if (NULL == dev->vdev) {
1980 em28xx_errdev("cannot allocate video_device.\n");
1981 goto fail_unreg;
1982 }
1983 if (dev->tuner_type != TUNER_ABSENT)
1984 dev->vdev->type |= VID_TYPE_TUNER;
1985
1986 /* register v4l2 video video_device */
1987 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1988 video_nr[dev->devno]);
1989 if (retval) {
1990 em28xx_errdev("unable to register video device (error=%i).\n",
1991 retval);
1992 goto fail_unreg;
1993 }
1994
1995 /* Allocate and fill vbi video_device struct */
1996 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1997 VFL_TYPE_VBI, "vbi");
1998 /* register v4l2 vbi video_device */
1999 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2000 vbi_nr[dev->devno]) < 0) {
2001 em28xx_errdev("unable to register vbi device\n");
2002 retval = -ENODEV;
2003 goto fail_unreg;
2004 }
2005
2006 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2007 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2008 VFL_TYPE_RADIO, "radio");
2009 if (NULL == dev->radio_dev) {
2010 em28xx_errdev("cannot allocate video_device.\n");
2011 goto fail_unreg;
2012 }
2013 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2014 radio_nr[dev->devno]);
2015 if (retval < 0) {
2016 em28xx_errdev("can't register radio device\n");
2017 goto fail_unreg;
2018 }
2019 em28xx_info("Registered radio device as /dev/radio%d\n",
2020 dev->radio_dev->minor & 0x1f);
2021 }
2022
2023 /* init video dma queues */
2024 INIT_LIST_HEAD(&dev->vidq.active);
2025 INIT_LIST_HEAD(&dev->vidq.queued);
2026
2027
2028 if (dev->has_msp34xx) {
2029 /* Send a reset to other chips via gpio */
2030 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2031 msleep(3);
2032 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2033 msleep(3);
2034 }
2035
2036 video_mux(dev, 0);
2037
2038 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2039 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2040 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2041
2042 mutex_lock(&em28xx_extension_devlist_lock);
2043 if (!list_empty(&em28xx_extension_devlist)) {
2044 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2045 if (ops->id)
2046 ops->init(dev);
2047 }
2048 }
2049 mutex_unlock(&em28xx_extension_devlist_lock);
2050
2051 return 0;
2052
2053 fail_unreg:
2054 em28xx_release_resources(dev);
2055 mutex_unlock(&dev->lock);
2056 kfree(dev);
2057 return retval;
2058 }
2059
2060 #if defined(CONFIG_MODULES) && defined(MODULE)
2061 static void request_module_async(struct work_struct *work)
2062 {
2063 struct em28xx *dev = container_of(work,
2064 struct em28xx, request_module_wk);
2065
2066 if (dev->has_audio_class)
2067 request_module("snd-usb-audio");
2068 else
2069 request_module("em28xx-alsa");
2070
2071 if (dev->has_dvb)
2072 request_module("em28xx-dvb");
2073 }
2074
2075 static void request_modules(struct em28xx *dev)
2076 {
2077 INIT_WORK(&dev->request_module_wk, request_module_async);
2078 schedule_work(&dev->request_module_wk);
2079 }
2080 #else
2081 #define request_modules(dev)
2082 #endif /* CONFIG_MODULES */
2083
2084 /*
2085 * em28xx_usb_probe()
2086 * checks for supported devices
2087 */
2088 static int em28xx_usb_probe(struct usb_interface *interface,
2089 const struct usb_device_id *id)
2090 {
2091 const struct usb_endpoint_descriptor *endpoint;
2092 struct usb_device *udev;
2093 struct usb_interface *uif;
2094 struct em28xx *dev = NULL;
2095 int retval = -ENODEV;
2096 int i, nr, ifnum;
2097
2098 udev = usb_get_dev(interface_to_usbdev(interface));
2099 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2100
2101 /* Check to see next free device and mark as used */
2102 nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2103 em28xx_devused |= 1<<nr;
2104
2105 /* Don't register audio interfaces */
2106 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2107 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2108 udev->descriptor.idVendor,
2109 udev->descriptor.idProduct,
2110 ifnum,
2111 interface->altsetting[0].desc.bInterfaceClass);
2112
2113 em28xx_devused &= ~(1<<nr);
2114 return -ENODEV;
2115 }
2116
2117 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2118 udev->descriptor.idVendor,
2119 udev->descriptor.idProduct,
2120 ifnum,
2121 interface->altsetting[0].desc.bInterfaceClass);
2122
2123 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2124
2125 /* check if the device has the iso in endpoint at the correct place */
2126 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2127 USB_ENDPOINT_XFER_ISOC) {
2128 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2129 em28xx_devused &= ~(1<<nr);
2130 return -ENODEV;
2131 }
2132 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2133 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2134 em28xx_devused &= ~(1<<nr);
2135 return -ENODEV;
2136 }
2137
2138 if (nr >= EM28XX_MAXBOARDS) {
2139 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2140 EM28XX_MAXBOARDS);
2141 em28xx_devused &= ~(1<<nr);
2142 return -ENOMEM;
2143 }
2144
2145 /* allocate memory for our device state and initialize it */
2146 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2147 if (dev == NULL) {
2148 em28xx_err(DRIVER_NAME ": out of memory!\n");
2149 em28xx_devused &= ~(1<<nr);
2150 return -ENOMEM;
2151 }
2152
2153 snprintf(dev->name, 29, "em28xx #%d", nr);
2154 dev->devno = nr;
2155 dev->model = id->driver_info;
2156 dev->alt = -1;
2157
2158 /* Checks if audio is provided by some interface */
2159 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2160 uif = udev->config->interface[i];
2161 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2162 dev->has_audio_class = 1;
2163 break;
2164 }
2165 }
2166
2167 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2168 dev->has_audio_class ? "Has" : "Doesn't have");
2169
2170 /* compute alternate max packet sizes */
2171 uif = udev->actconfig->interface[0];
2172
2173 dev->num_alt = uif->num_altsetting;
2174 em28xx_info("Alternate settings: %i\n", dev->num_alt);
2175 /* dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2176 dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2177
2178 if (dev->alt_max_pkt_size == NULL) {
2179 em28xx_errdev("out of memory!\n");
2180 em28xx_devused &= ~(1<<nr);
2181 kfree(dev);
2182 return -ENOMEM;
2183 }
2184
2185 for (i = 0; i < dev->num_alt ; i++) {
2186 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2187 wMaxPacketSize);
2188 dev->alt_max_pkt_size[i] =
2189 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2190 em28xx_info("Alternate setting %i, max size= %i\n", i,
2191 dev->alt_max_pkt_size[i]);
2192 }
2193
2194 if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2195 dev->model = card[nr];
2196
2197 /* allocate device struct */
2198 retval = em28xx_init_dev(&dev, udev, nr);
2199 if (retval)
2200 return retval;
2201
2202 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2203
2204 /* save our data pointer in this interface device */
2205 usb_set_intfdata(interface, dev);
2206
2207 request_modules(dev);
2208
2209 return 0;
2210 }
2211
2212 /*
2213 * em28xx_usb_disconnect()
2214 * called when the device gets diconencted
2215 * video device will be unregistered on v4l2_close in case it is still open
2216 */
2217 static void em28xx_usb_disconnect(struct usb_interface *interface)
2218 {
2219 struct em28xx *dev;
2220 struct em28xx_ops *ops = NULL;
2221
2222 dev = usb_get_intfdata(interface);
2223 usb_set_intfdata(interface, NULL);
2224
2225 if (!dev)
2226 return;
2227
2228 em28xx_info("disconnecting %s\n", dev->vdev->name);
2229
2230 /* wait until all current v4l2 io is finished then deallocate
2231 resources */
2232 mutex_lock(&dev->lock);
2233
2234 wake_up_interruptible_all(&dev->open);
2235
2236 if (dev->users) {
2237 em28xx_warn
2238 ("device /dev/video%d is open! Deregistration and memory "
2239 "deallocation are deferred on close.\n",
2240 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2241
2242 dev->state |= DEV_MISCONFIGURED;
2243 em28xx_uninit_isoc(dev);
2244 dev->state |= DEV_DISCONNECTED;
2245 wake_up_interruptible(&dev->wait_frame);
2246 wake_up_interruptible(&dev->wait_stream);
2247 } else {
2248 dev->state |= DEV_DISCONNECTED;
2249 em28xx_release_resources(dev);
2250 }
2251 mutex_unlock(&dev->lock);
2252
2253 mutex_lock(&em28xx_extension_devlist_lock);
2254 if (!list_empty(&em28xx_extension_devlist)) {
2255 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2256 ops->fini(dev);
2257 }
2258 }
2259 mutex_unlock(&em28xx_extension_devlist_lock);
2260
2261 if (!dev->users) {
2262 kfree(dev->alt_max_pkt_size);
2263 kfree(dev);
2264 }
2265 }
2266
2267 static struct usb_driver em28xx_usb_driver = {
2268 .name = "em28xx",
2269 .probe = em28xx_usb_probe,
2270 .disconnect = em28xx_usb_disconnect,
2271 .id_table = em28xx_id_table,
2272 };
2273
2274 static int __init em28xx_module_init(void)
2275 {
2276 int result;
2277
2278 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2279 (EM28XX_VERSION_CODE >> 16) & 0xff,
2280 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2281 #ifdef SNAPSHOT
2282 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2283 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2284 #endif
2285
2286 /* register this driver with the USB subsystem */
2287 result = usb_register(&em28xx_usb_driver);
2288 if (result)
2289 em28xx_err(DRIVER_NAME
2290 " usb_register failed. Error number %d.\n", result);
2291
2292 return result;
2293 }
2294
2295 static void __exit em28xx_module_exit(void)
2296 {
2297 /* deregister this driver with the USB subsystem */
2298 usb_deregister(&em28xx_usb_driver);
2299 }
2300
2301 module_init(em28xx_module_init);
2302 module_exit(em28xx_module_exit);
Linux kernel - Deliverables
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