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V4L/DVB (8482): videodev: move all ioctl callbacks to a new v4l2_ioctl_ops struct
[GitHub/mt8127/android_kernel_alcatel_ttab.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/v4l2-ioctl.h>
42 #include <media/msp3400.h>
43 #include <media/tuner.h>
44
45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
46 "Markus Rechberger <mrechberger@gmail.com>, " \
47 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
48 "Sascha Sommer <saschasommer@freenet.de>"
49
50 #define DRIVER_NAME "em28xx"
51 #define DRIVER_DESC "Empia em28xx based USB video device driver"
52 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
53
54 #define em28xx_videodbg(fmt, arg...) do {\
55 if (video_debug) \
56 printk(KERN_INFO "%s %s :"fmt, \
57 dev->name, __func__ , ##arg); } while (0)
58
59 static unsigned int isoc_debug;
60 module_param(isoc_debug, int, 0644);
61 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
62
63 #define em28xx_isocdbg(fmt, arg...) \
64 do {\
65 if (isoc_debug) { \
66 printk(KERN_INFO "%s %s :"fmt, \
67 dev->name, __func__ , ##arg); \
68 } \
69 } while (0)
70
71 MODULE_AUTHOR(DRIVER_AUTHOR);
72 MODULE_DESCRIPTION(DRIVER_DESC);
73 MODULE_LICENSE("GPL");
74
75 static LIST_HEAD(em28xx_devlist);
76
77 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
78 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
79 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
80 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
81
82 module_param_array(card, int, NULL, 0444);
83 module_param_array(video_nr, int, NULL, 0444);
84 module_param_array(vbi_nr, int, NULL, 0444);
85 module_param_array(radio_nr, int, NULL, 0444);
86 MODULE_PARM_DESC(card, "card type");
87 MODULE_PARM_DESC(video_nr, "video device numbers");
88 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
89 MODULE_PARM_DESC(radio_nr, "radio device numbers");
90
91 static unsigned int video_debug;
92 module_param(video_debug, int, 0644);
93 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
94
95 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
96 static unsigned long em28xx_devused;
97
98 /* supported controls */
99 /* Common to all boards */
100 static struct v4l2_queryctrl em28xx_qctrl[] = {
101 {
102 .id = V4L2_CID_AUDIO_VOLUME,
103 .type = V4L2_CTRL_TYPE_INTEGER,
104 .name = "Volume",
105 .minimum = 0x0,
106 .maximum = 0x1f,
107 .step = 0x1,
108 .default_value = 0x1f,
109 .flags = 0,
110 }, {
111 .id = V4L2_CID_AUDIO_MUTE,
112 .type = V4L2_CTRL_TYPE_BOOLEAN,
113 .name = "Mute",
114 .minimum = 0,
115 .maximum = 1,
116 .step = 1,
117 .default_value = 1,
118 .flags = 0,
119 }
120 };
121
122 static struct usb_driver em28xx_usb_driver;
123
124 /* ------------------------------------------------------------------
125 DMA and thread functions
126 ------------------------------------------------------------------*/
127
128 /*
129 * Announces that a buffer were filled and request the next
130 */
131 static inline void buffer_filled(struct em28xx *dev,
132 struct em28xx_dmaqueue *dma_q,
133 struct em28xx_buffer *buf)
134 {
135 /* Advice that buffer was filled */
136 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
137 buf->vb.state = VIDEOBUF_DONE;
138 buf->vb.field_count++;
139 do_gettimeofday(&buf->vb.ts);
140
141 dev->isoc_ctl.buf = NULL;
142
143 list_del(&buf->vb.queue);
144 wake_up(&buf->vb.done);
145 }
146
147 /*
148 * Identify the buffer header type and properly handles
149 */
150 static void em28xx_copy_video(struct em28xx *dev,
151 struct em28xx_dmaqueue *dma_q,
152 struct em28xx_buffer *buf,
153 unsigned char *p,
154 unsigned char *outp, unsigned long len)
155 {
156 void *fieldstart, *startwrite, *startread;
157 int linesdone, currlinedone, offset, lencopy, remain;
158 int bytesperline = dev->width << 1;
159
160 if (dma_q->pos + len > buf->vb.size)
161 len = buf->vb.size - dma_q->pos;
162
163 if (p[0] != 0x88 && p[0] != 0x22) {
164 em28xx_isocdbg("frame is not complete\n");
165 len += 4;
166 } else
167 p += 4;
168
169 startread = p;
170 remain = len;
171
172 /* Interlaces frame */
173 if (buf->top_field)
174 fieldstart = outp;
175 else
176 fieldstart = outp + bytesperline;
177
178 linesdone = dma_q->pos / bytesperline;
179 currlinedone = dma_q->pos % bytesperline;
180 offset = linesdone * bytesperline * 2 + currlinedone;
181 startwrite = fieldstart + offset;
182 lencopy = bytesperline - currlinedone;
183 lencopy = lencopy > remain ? remain : lencopy;
184
185 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
186 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
187 ((char *)startwrite + lencopy) -
188 ((char *)outp + buf->vb.size));
189 lencopy = remain = (char *)outp + buf->vb.size - (char *)startwrite;
190 }
191 if (lencopy <= 0)
192 return;
193 memcpy(startwrite, startread, lencopy);
194
195 remain -= lencopy;
196
197 while (remain > 0) {
198 startwrite += lencopy + bytesperline;
199 startread += lencopy;
200 if (bytesperline > remain)
201 lencopy = remain;
202 else
203 lencopy = bytesperline;
204
205 if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
206 em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
207 ((char *)startwrite + lencopy) -
208 ((char *)outp + buf->vb.size));
209 lencopy = remain = (char *)outp + buf->vb.size -
210 (char *)startwrite;
211 }
212 if (lencopy <= 0)
213 break;
214
215 memcpy(startwrite, startread, lencopy);
216
217 remain -= lencopy;
218 }
219
220 dma_q->pos += len;
221 }
222
223 static inline void print_err_status(struct em28xx *dev,
224 int packet, int status)
225 {
226 char *errmsg = "Unknown";
227
228 switch (status) {
229 case -ENOENT:
230 errmsg = "unlinked synchronuously";
231 break;
232 case -ECONNRESET:
233 errmsg = "unlinked asynchronuously";
234 break;
235 case -ENOSR:
236 errmsg = "Buffer error (overrun)";
237 break;
238 case -EPIPE:
239 errmsg = "Stalled (device not responding)";
240 break;
241 case -EOVERFLOW:
242 errmsg = "Babble (bad cable?)";
243 break;
244 case -EPROTO:
245 errmsg = "Bit-stuff error (bad cable?)";
246 break;
247 case -EILSEQ:
248 errmsg = "CRC/Timeout (could be anything)";
249 break;
250 case -ETIME:
251 errmsg = "Device does not respond";
252 break;
253 }
254 if (packet < 0) {
255 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
256 } else {
257 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
258 packet, status, errmsg);
259 }
260 }
261
262 /*
263 * video-buf generic routine to get the next available buffer
264 */
265 static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
266 struct em28xx_buffer **buf)
267 {
268 struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
269 char *outp;
270
271 if (list_empty(&dma_q->active)) {
272 em28xx_isocdbg("No active queue to serve\n");
273 dev->isoc_ctl.buf = NULL;
274 *buf = NULL;
275 return;
276 }
277
278 /* Get the next buffer */
279 *buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
280
281 /* Cleans up buffer - Usefull for testing for frame/URB loss */
282 outp = videobuf_to_vmalloc(&(*buf)->vb);
283 memset(outp, 0, (*buf)->vb.size);
284
285 dev->isoc_ctl.buf = *buf;
286
287 return;
288 }
289
290 /*
291 * Controls the isoc copy of each urb packet
292 */
293 static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
294 {
295 struct em28xx_buffer *buf;
296 struct em28xx_dmaqueue *dma_q = urb->context;
297 unsigned char *outp = NULL;
298 int i, len = 0, rc = 1;
299 unsigned char *p;
300
301 if (!dev)
302 return 0;
303
304 if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
305 return 0;
306
307 if (urb->status < 0) {
308 print_err_status(dev, -1, urb->status);
309 if (urb->status == -ENOENT)
310 return 0;
311 }
312
313 buf = dev->isoc_ctl.buf;
314 if (buf != NULL)
315 outp = videobuf_to_vmalloc(&buf->vb);
316
317 for (i = 0; i < urb->number_of_packets; i++) {
318 int status = urb->iso_frame_desc[i].status;
319
320 if (status < 0) {
321 print_err_status(dev, i, status);
322 if (urb->iso_frame_desc[i].status != -EPROTO)
323 continue;
324 }
325
326 len = urb->iso_frame_desc[i].actual_length - 4;
327
328 if (urb->iso_frame_desc[i].actual_length <= 0) {
329 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
330 continue;
331 }
332 if (urb->iso_frame_desc[i].actual_length >
333 dev->max_pkt_size) {
334 em28xx_isocdbg("packet bigger than packet size");
335 continue;
336 }
337
338 p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
339
340 /* FIXME: incomplete buffer checks where removed to make
341 logic simpler. Impacts of those changes should be evaluated
342 */
343 if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
344 em28xx_isocdbg("VBI HEADER!!!\n");
345 /* FIXME: Should add vbi copy */
346 continue;
347 }
348 if (p[0] == 0x22 && p[1] == 0x5a) {
349 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
350 len, (p[2] & 1)? "odd" : "even");
351
352 if (!(p[2] & 1)) {
353 if (buf != NULL)
354 buffer_filled(dev, dma_q, buf);
355 get_next_buf(dma_q, &buf);
356 if (buf == NULL)
357 outp = NULL;
358 else
359 outp = videobuf_to_vmalloc(&buf->vb);
360 }
361
362 if (buf != NULL) {
363 if (p[2] & 1)
364 buf->top_field = 0;
365 else
366 buf->top_field = 1;
367 }
368
369 dma_q->pos = 0;
370 }
371 if (buf != NULL)
372 em28xx_copy_video(dev, dma_q, buf, p, outp, len);
373 }
374 return rc;
375 }
376
377 /* ------------------------------------------------------------------
378 Videobuf operations
379 ------------------------------------------------------------------*/
380
381 static int
382 buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
383 {
384 struct em28xx_fh *fh = vq->priv_data;
385 struct em28xx *dev = fh->dev;
386 struct v4l2_frequency f;
387
388 *size = 16 * fh->dev->width * fh->dev->height >> 3;
389 if (0 == *count)
390 *count = EM28XX_DEF_BUF;
391
392 if (*count < EM28XX_MIN_BUF)
393 *count = EM28XX_MIN_BUF;
394
395 /* Ask tuner to go to analog mode */
396 memset(&f, 0, sizeof(f));
397 f.frequency = dev->ctl_freq;
398
399 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
400
401 return 0;
402 }
403
404 /* This is called *without* dev->slock held; please keep it that way */
405 static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
406 {
407 struct em28xx_fh *fh = vq->priv_data;
408 struct em28xx *dev = fh->dev;
409 unsigned long flags = 0;
410 if (in_interrupt())
411 BUG();
412
413 /* We used to wait for the buffer to finish here, but this didn't work
414 because, as we were keeping the state as VIDEOBUF_QUEUED,
415 videobuf_queue_cancel marked it as finished for us.
416 (Also, it could wedge forever if the hardware was misconfigured.)
417
418 This should be safe; by the time we get here, the buffer isn't
419 queued anymore. If we ever start marking the buffers as
420 VIDEOBUF_ACTIVE, it won't be, though.
421 */
422 spin_lock_irqsave(&dev->slock, flags);
423 if (dev->isoc_ctl.buf == buf)
424 dev->isoc_ctl.buf = NULL;
425 spin_unlock_irqrestore(&dev->slock, flags);
426
427 videobuf_vmalloc_free(&buf->vb);
428 buf->vb.state = VIDEOBUF_NEEDS_INIT;
429 }
430
431 static int
432 buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
433 enum v4l2_field field)
434 {
435 struct em28xx_fh *fh = vq->priv_data;
436 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
437 struct em28xx *dev = fh->dev;
438 int rc = 0, urb_init = 0;
439
440 /* FIXME: It assumes depth = 16 */
441 /* The only currently supported format is 16 bits/pixel */
442 buf->vb.size = 16 * dev->width * dev->height >> 3;
443
444 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
445 return -EINVAL;
446
447 buf->vb.width = dev->width;
448 buf->vb.height = dev->height;
449 buf->vb.field = field;
450
451 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
452 rc = videobuf_iolock(vq, &buf->vb, NULL);
453 if (rc < 0)
454 goto fail;
455 }
456
457 if (!dev->isoc_ctl.num_bufs)
458 urb_init = 1;
459
460 if (urb_init) {
461 rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
462 EM28XX_NUM_BUFS, dev->max_pkt_size,
463 em28xx_isoc_copy);
464 if (rc < 0)
465 goto fail;
466 }
467
468 buf->vb.state = VIDEOBUF_PREPARED;
469 return 0;
470
471 fail:
472 free_buffer(vq, buf);
473 return rc;
474 }
475
476 static void
477 buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
478 {
479 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
480 struct em28xx_fh *fh = vq->priv_data;
481 struct em28xx *dev = fh->dev;
482 struct em28xx_dmaqueue *vidq = &dev->vidq;
483
484 buf->vb.state = VIDEOBUF_QUEUED;
485 list_add_tail(&buf->vb.queue, &vidq->active);
486
487 }
488
489 static void buffer_release(struct videobuf_queue *vq,
490 struct videobuf_buffer *vb)
491 {
492 struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
493 struct em28xx_fh *fh = vq->priv_data;
494 struct em28xx *dev = (struct em28xx *)fh->dev;
495
496 em28xx_isocdbg("em28xx: called buffer_release\n");
497
498 free_buffer(vq, buf);
499 }
500
501 static struct videobuf_queue_ops em28xx_video_qops = {
502 .buf_setup = buffer_setup,
503 .buf_prepare = buffer_prepare,
504 .buf_queue = buffer_queue,
505 .buf_release = buffer_release,
506 };
507
508 /********************* v4l2 interface **************************************/
509
510 /*
511 * em28xx_config()
512 * inits registers with sane defaults
513 */
514 static int em28xx_config(struct em28xx *dev)
515 {
516
517 /* Sets I2C speed to 100 KHz */
518 if (!dev->is_em2800)
519 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
520
521 /* enable vbi capturing */
522
523 /* em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
524 /* em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
525 em28xx_write_regs_req(dev, 0x00, 0x11, "\x51", 1);
526
527 dev->mute = 1; /* maybe not the right place... */
528 dev->volume = 0x1f;
529
530 em28xx_outfmt_set_yuv422(dev);
531 em28xx_colorlevels_set_default(dev);
532 em28xx_compression_disable(dev);
533
534 return 0;
535 }
536
537 /*
538 * em28xx_config_i2c()
539 * configure i2c attached devices
540 */
541 static void em28xx_config_i2c(struct em28xx *dev)
542 {
543 struct v4l2_routing route;
544
545 route.input = INPUT(dev->ctl_input)->vmux;
546 route.output = 0;
547 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
548 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
549 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
550 }
551
552 static void video_mux(struct em28xx *dev, int index)
553 {
554 struct v4l2_routing route;
555
556 route.input = INPUT(index)->vmux;
557 route.output = 0;
558 dev->ctl_input = index;
559 dev->ctl_ainput = INPUT(index)->amux;
560
561 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
562
563 if (dev->has_msp34xx) {
564 if (dev->i2s_speed) {
565 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ,
566 &dev->i2s_speed);
567 }
568 route.input = dev->ctl_ainput;
569 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
570 /* Note: this is msp3400 specific */
571 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING,
572 &route);
573 }
574
575 em28xx_audio_analog_set(dev);
576 }
577
578 /* Usage lock check functions */
579 static int res_get(struct em28xx_fh *fh)
580 {
581 struct em28xx *dev = fh->dev;
582 int rc = 0;
583
584 /* This instance already has stream_on */
585 if (fh->stream_on)
586 return rc;
587
588 if (dev->stream_on)
589 return -EINVAL;
590
591 mutex_lock(&dev->lock);
592 dev->stream_on = 1;
593 fh->stream_on = 1;
594 mutex_unlock(&dev->lock);
595 return rc;
596 }
597
598 static int res_check(struct em28xx_fh *fh)
599 {
600 return (fh->stream_on);
601 }
602
603 static void res_free(struct em28xx_fh *fh)
604 {
605 struct em28xx *dev = fh->dev;
606
607 mutex_lock(&dev->lock);
608 fh->stream_on = 0;
609 dev->stream_on = 0;
610 mutex_unlock(&dev->lock);
611 }
612
613 /*
614 * em28xx_get_ctrl()
615 * return the current saturation, brightness or contrast, mute state
616 */
617 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
618 {
619 switch (ctrl->id) {
620 case V4L2_CID_AUDIO_MUTE:
621 ctrl->value = dev->mute;
622 return 0;
623 case V4L2_CID_AUDIO_VOLUME:
624 ctrl->value = dev->volume;
625 return 0;
626 default:
627 return -EINVAL;
628 }
629 }
630
631 /*
632 * em28xx_set_ctrl()
633 * mute or set new saturation, brightness or contrast
634 */
635 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
636 {
637 switch (ctrl->id) {
638 case V4L2_CID_AUDIO_MUTE:
639 if (ctrl->value != dev->mute) {
640 dev->mute = ctrl->value;
641 return em28xx_audio_analog_set(dev);
642 }
643 return 0;
644 case V4L2_CID_AUDIO_VOLUME:
645 dev->volume = ctrl->value;
646 return em28xx_audio_analog_set(dev);
647 default:
648 return -EINVAL;
649 }
650 }
651
652 static int check_dev(struct em28xx *dev)
653 {
654 if (dev->state & DEV_DISCONNECTED) {
655 em28xx_errdev("v4l2 ioctl: device not present\n");
656 return -ENODEV;
657 }
658
659 if (dev->state & DEV_MISCONFIGURED) {
660 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
661 "close and open it again\n");
662 return -EIO;
663 }
664 return 0;
665 }
666
667 static void get_scale(struct em28xx *dev,
668 unsigned int width, unsigned int height,
669 unsigned int *hscale, unsigned int *vscale)
670 {
671 unsigned int maxw = norm_maxw(dev);
672 unsigned int maxh = norm_maxh(dev);
673
674 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
675 if (*hscale >= 0x4000)
676 *hscale = 0x3fff;
677
678 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
679 if (*vscale >= 0x4000)
680 *vscale = 0x3fff;
681 }
682
683 /* ------------------------------------------------------------------
684 IOCTL vidioc handling
685 ------------------------------------------------------------------*/
686
687 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
688 struct v4l2_format *f)
689 {
690 struct em28xx_fh *fh = priv;
691 struct em28xx *dev = fh->dev;
692
693 mutex_lock(&dev->lock);
694
695 f->fmt.pix.width = dev->width;
696 f->fmt.pix.height = dev->height;
697 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
698 f->fmt.pix.bytesperline = dev->width * 2;
699 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
700 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
701
702 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
703 f->fmt.pix.field = dev->interlaced ?
704 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
705
706 mutex_unlock(&dev->lock);
707 return 0;
708 }
709
710 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
711 struct v4l2_format *f)
712 {
713 struct em28xx_fh *fh = priv;
714 struct em28xx *dev = fh->dev;
715 int width = f->fmt.pix.width;
716 int height = f->fmt.pix.height;
717 unsigned int maxw = norm_maxw(dev);
718 unsigned int maxh = norm_maxh(dev);
719 unsigned int hscale, vscale;
720
721 /* width must even because of the YUYV format
722 height must be even because of interlacing */
723 height &= 0xfffe;
724 width &= 0xfffe;
725
726 if (height < 32)
727 height = 32;
728 if (height > maxh)
729 height = maxh;
730 if (width < 48)
731 width = 48;
732 if (width > maxw)
733 width = maxw;
734
735 mutex_lock(&dev->lock);
736
737 if (dev->is_em2800) {
738 /* the em2800 can only scale down to 50% */
739 if (height % (maxh / 2))
740 height = maxh;
741 if (width % (maxw / 2))
742 width = maxw;
743 /* according to empiatech support */
744 /* the MaxPacketSize is to small to support */
745 /* framesizes larger than 640x480 @ 30 fps */
746 /* or 640x576 @ 25 fps. As this would cut */
747 /* of a part of the image we prefer */
748 /* 360x576 or 360x480 for now */
749 if (width == maxw && height == maxh)
750 width /= 2;
751 }
752
753 get_scale(dev, width, height, &hscale, &vscale);
754
755 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
756 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
757
758 f->fmt.pix.width = width;
759 f->fmt.pix.height = height;
760 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
761 f->fmt.pix.bytesperline = width * 2;
762 f->fmt.pix.sizeimage = width * 2 * height;
763 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
764 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
765
766 mutex_unlock(&dev->lock);
767 return 0;
768 }
769
770 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
771 struct v4l2_format *f)
772 {
773 struct em28xx_fh *fh = priv;
774 struct em28xx *dev = fh->dev;
775 int rc;
776
777 rc = check_dev(dev);
778 if (rc < 0)
779 return rc;
780
781 vidioc_try_fmt_vid_cap(file, priv, f);
782
783 mutex_lock(&dev->lock);
784
785 if (videobuf_queue_is_busy(&fh->vb_vidq)) {
786 em28xx_errdev("%s queue busy\n", __func__);
787 rc = -EBUSY;
788 goto out;
789 }
790
791 if (dev->stream_on && !fh->stream_on) {
792 em28xx_errdev("%s device in use by another fh\n", __func__);
793 rc = -EBUSY;
794 goto out;
795 }
796
797 /* set new image size */
798 dev->width = f->fmt.pix.width;
799 dev->height = f->fmt.pix.height;
800 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
801
802 em28xx_set_alternate(dev);
803 em28xx_resolution_set(dev);
804
805 rc = 0;
806
807 out:
808 mutex_unlock(&dev->lock);
809 return rc;
810 }
811
812 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * norm)
813 {
814 struct em28xx_fh *fh = priv;
815 struct em28xx *dev = fh->dev;
816 struct v4l2_format f;
817 int rc;
818
819 rc = check_dev(dev);
820 if (rc < 0)
821 return rc;
822
823 mutex_lock(&dev->lock);
824 dev->norm = *norm;
825 mutex_unlock(&dev->lock);
826
827 /* Adjusts width/height, if needed */
828 f.fmt.pix.width = dev->width;
829 f.fmt.pix.height = dev->height;
830 vidioc_try_fmt_vid_cap(file, priv, &f);
831
832 mutex_lock(&dev->lock);
833
834 /* set new image size */
835 dev->width = f.fmt.pix.width;
836 dev->height = f.fmt.pix.height;
837 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
838
839 em28xx_resolution_set(dev);
840 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
841
842 mutex_unlock(&dev->lock);
843 return 0;
844 }
845
846 static const char *iname[] = {
847 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
848 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
849 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
850 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
851 [EM28XX_VMUX_SVIDEO] = "S-Video",
852 [EM28XX_VMUX_TELEVISION] = "Television",
853 [EM28XX_VMUX_CABLE] = "Cable TV",
854 [EM28XX_VMUX_DVB] = "DVB",
855 [EM28XX_VMUX_DEBUG] = "for debug only",
856 };
857
858 static int vidioc_enum_input(struct file *file, void *priv,
859 struct v4l2_input *i)
860 {
861 struct em28xx_fh *fh = priv;
862 struct em28xx *dev = fh->dev;
863 unsigned int n;
864
865 n = i->index;
866 if (n >= MAX_EM28XX_INPUT)
867 return -EINVAL;
868 if (0 == INPUT(n)->type)
869 return -EINVAL;
870
871 i->index = n;
872 i->type = V4L2_INPUT_TYPE_CAMERA;
873
874 strcpy(i->name, iname[INPUT(n)->type]);
875
876 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
877 (EM28XX_VMUX_CABLE == INPUT(n)->type))
878 i->type = V4L2_INPUT_TYPE_TUNER;
879
880 i->std = dev->vdev->tvnorms;
881
882 return 0;
883 }
884
885 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
886 {
887 struct em28xx_fh *fh = priv;
888 struct em28xx *dev = fh->dev;
889
890 *i = dev->ctl_input;
891
892 return 0;
893 }
894
895 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
896 {
897 struct em28xx_fh *fh = priv;
898 struct em28xx *dev = fh->dev;
899 int rc;
900
901 rc = check_dev(dev);
902 if (rc < 0)
903 return rc;
904
905 if (i >= MAX_EM28XX_INPUT)
906 return -EINVAL;
907 if (0 == INPUT(i)->type)
908 return -EINVAL;
909
910 mutex_lock(&dev->lock);
911
912 video_mux(dev, i);
913
914 mutex_unlock(&dev->lock);
915 return 0;
916 }
917
918 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
919 {
920 struct em28xx_fh *fh = priv;
921 struct em28xx *dev = fh->dev;
922 unsigned int index = a->index;
923
924 if (a->index > 1)
925 return -EINVAL;
926
927 index = dev->ctl_ainput;
928
929 if (index == 0)
930 strcpy(a->name, "Television");
931 else
932 strcpy(a->name, "Line In");
933
934 a->capability = V4L2_AUDCAP_STEREO;
935 a->index = index;
936
937 return 0;
938 }
939
940 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
941 {
942 struct em28xx_fh *fh = priv;
943 struct em28xx *dev = fh->dev;
944
945 if (a->index != dev->ctl_ainput)
946 return -EINVAL;
947
948 return 0;
949 }
950
951 static int vidioc_queryctrl(struct file *file, void *priv,
952 struct v4l2_queryctrl *qc)
953 {
954 struct em28xx_fh *fh = priv;
955 struct em28xx *dev = fh->dev;
956 int id = qc->id;
957 int i;
958 int rc;
959
960 rc = check_dev(dev);
961 if (rc < 0)
962 return rc;
963
964 memset(qc, 0, sizeof(*qc));
965
966 qc->id = id;
967
968 if (!dev->has_msp34xx) {
969 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
970 if (qc->id && qc->id == em28xx_qctrl[i].id) {
971 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
972 return 0;
973 }
974 }
975 }
976 mutex_lock(&dev->lock);
977 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
978 mutex_unlock(&dev->lock);
979
980 if (qc->type)
981 return 0;
982 else
983 return -EINVAL;
984 }
985
986 static int vidioc_g_ctrl(struct file *file, void *priv,
987 struct v4l2_control *ctrl)
988 {
989 struct em28xx_fh *fh = priv;
990 struct em28xx *dev = fh->dev;
991 int rc;
992
993 rc = check_dev(dev);
994 if (rc < 0)
995 return rc;
996 mutex_lock(&dev->lock);
997
998 if (!dev->has_msp34xx)
999 rc = em28xx_get_ctrl(dev, ctrl);
1000 else
1001 rc = -EINVAL;
1002
1003 if (rc == -EINVAL) {
1004 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
1005 rc = 0;
1006 }
1007
1008 mutex_unlock(&dev->lock);
1009 return rc;
1010 }
1011
1012 static int vidioc_s_ctrl(struct file *file, void *priv,
1013 struct v4l2_control *ctrl)
1014 {
1015 struct em28xx_fh *fh = priv;
1016 struct em28xx *dev = fh->dev;
1017 u8 i;
1018 int rc;
1019
1020 rc = check_dev(dev);
1021 if (rc < 0)
1022 return rc;
1023
1024 mutex_lock(&dev->lock);
1025
1026 if (dev->has_msp34xx)
1027 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1028 else {
1029 rc = 1;
1030 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1031 if (ctrl->id == em28xx_qctrl[i].id) {
1032 if (ctrl->value < em28xx_qctrl[i].minimum ||
1033 ctrl->value > em28xx_qctrl[i].maximum) {
1034 rc = -ERANGE;
1035 break;
1036 }
1037
1038 rc = em28xx_set_ctrl(dev, ctrl);
1039 break;
1040 }
1041 }
1042 }
1043
1044 /* Control not found - try to send it to the attached devices */
1045 if (rc == 1) {
1046 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
1047 rc = 0;
1048 }
1049
1050 mutex_unlock(&dev->lock);
1051 return rc;
1052 }
1053
1054 static int vidioc_g_tuner(struct file *file, void *priv,
1055 struct v4l2_tuner *t)
1056 {
1057 struct em28xx_fh *fh = priv;
1058 struct em28xx *dev = fh->dev;
1059 int rc;
1060
1061 rc = check_dev(dev);
1062 if (rc < 0)
1063 return rc;
1064
1065 if (0 != t->index)
1066 return -EINVAL;
1067
1068 strcpy(t->name, "Tuner");
1069
1070 mutex_lock(&dev->lock);
1071
1072 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1073
1074 mutex_unlock(&dev->lock);
1075 return 0;
1076 }
1077
1078 static int vidioc_s_tuner(struct file *file, void *priv,
1079 struct v4l2_tuner *t)
1080 {
1081 struct em28xx_fh *fh = priv;
1082 struct em28xx *dev = fh->dev;
1083 int rc;
1084
1085 rc = check_dev(dev);
1086 if (rc < 0)
1087 return rc;
1088
1089 if (0 != t->index)
1090 return -EINVAL;
1091
1092 mutex_lock(&dev->lock);
1093
1094 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1095
1096 mutex_unlock(&dev->lock);
1097 return 0;
1098 }
1099
1100 static int vidioc_g_frequency(struct file *file, void *priv,
1101 struct v4l2_frequency *f)
1102 {
1103 struct em28xx_fh *fh = priv;
1104 struct em28xx *dev = fh->dev;
1105
1106 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1107 f->frequency = dev->ctl_freq;
1108
1109 return 0;
1110 }
1111
1112 static int vidioc_s_frequency(struct file *file, void *priv,
1113 struct v4l2_frequency *f)
1114 {
1115 struct em28xx_fh *fh = priv;
1116 struct em28xx *dev = fh->dev;
1117 int rc;
1118
1119 rc = check_dev(dev);
1120 if (rc < 0)
1121 return rc;
1122
1123 if (0 != f->tuner)
1124 return -EINVAL;
1125
1126 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
1127 return -EINVAL;
1128 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
1129 return -EINVAL;
1130
1131 mutex_lock(&dev->lock);
1132
1133 dev->ctl_freq = f->frequency;
1134 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
1135
1136 mutex_unlock(&dev->lock);
1137 return 0;
1138 }
1139
1140 #ifdef CONFIG_VIDEO_ADV_DEBUG
1141 static int em28xx_reg_len(int reg)
1142 {
1143 switch (reg) {
1144 case EM28XX_R40_AC97LSB:
1145 case EM28XX_R30_HSCALELOW:
1146 case EM28XX_R32_VSCALELOW:
1147 return 2;
1148 default:
1149 return 1;
1150 }
1151 }
1152
1153 static int vidioc_g_register(struct file *file, void *priv,
1154 struct v4l2_register *reg)
1155 {
1156 struct em28xx_fh *fh = priv;
1157 struct em28xx *dev = fh->dev;
1158 int ret;
1159
1160 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
1161 return -EINVAL;
1162
1163 if (em28xx_reg_len(reg->reg) == 1) {
1164 ret = em28xx_read_reg(dev, reg->reg);
1165 if (ret < 0)
1166 return ret;
1167
1168 reg->val = ret;
1169 } else {
1170 __le64 val = 0;
1171 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
1172 reg->reg, (char *)&val, 2);
1173 if (ret < 0)
1174 return ret;
1175
1176 reg->val = le64_to_cpu(val);
1177 }
1178
1179 return 0;
1180 }
1181
1182 static int vidioc_s_register(struct file *file, void *priv,
1183 struct v4l2_register *reg)
1184 {
1185 struct em28xx_fh *fh = priv;
1186 struct em28xx *dev = fh->dev;
1187 __le64 buf;
1188
1189 buf = cpu_to_le64(reg->val);
1190
1191 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
1192 em28xx_reg_len(reg->reg));
1193 }
1194 #endif
1195
1196
1197 static int vidioc_cropcap(struct file *file, void *priv,
1198 struct v4l2_cropcap *cc)
1199 {
1200 struct em28xx_fh *fh = priv;
1201 struct em28xx *dev = fh->dev;
1202
1203 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1204 return -EINVAL;
1205
1206 cc->bounds.left = 0;
1207 cc->bounds.top = 0;
1208 cc->bounds.width = dev->width;
1209 cc->bounds.height = dev->height;
1210 cc->defrect = cc->bounds;
1211 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
1212 cc->pixelaspect.denominator = 59;
1213
1214 return 0;
1215 }
1216
1217 static int vidioc_streamon(struct file *file, void *priv,
1218 enum v4l2_buf_type type)
1219 {
1220 struct em28xx_fh *fh = priv;
1221 struct em28xx *dev = fh->dev;
1222 int rc;
1223
1224 rc = check_dev(dev);
1225 if (rc < 0)
1226 return rc;
1227
1228
1229 if (unlikely(res_get(fh) < 0))
1230 return -EBUSY;
1231
1232 return (videobuf_streamon(&fh->vb_vidq));
1233 }
1234
1235 static int vidioc_streamoff(struct file *file, void *priv,
1236 enum v4l2_buf_type type)
1237 {
1238 struct em28xx_fh *fh = priv;
1239 struct em28xx *dev = fh->dev;
1240 int rc;
1241
1242 rc = check_dev(dev);
1243 if (rc < 0)
1244 return rc;
1245
1246 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1247 return -EINVAL;
1248 if (type != fh->type)
1249 return -EINVAL;
1250
1251 videobuf_streamoff(&fh->vb_vidq);
1252 res_free(fh);
1253
1254 return 0;
1255 }
1256
1257 static int vidioc_querycap(struct file *file, void *priv,
1258 struct v4l2_capability *cap)
1259 {
1260 struct em28xx_fh *fh = priv;
1261 struct em28xx *dev = fh->dev;
1262
1263 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1264 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1265 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1266
1267 cap->version = EM28XX_VERSION_CODE;
1268
1269 cap->capabilities =
1270 V4L2_CAP_SLICED_VBI_CAPTURE |
1271 V4L2_CAP_VIDEO_CAPTURE |
1272 V4L2_CAP_AUDIO |
1273 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
1274
1275 if (dev->tuner_type != TUNER_ABSENT)
1276 cap->capabilities |= V4L2_CAP_TUNER;
1277
1278 return 0;
1279 }
1280
1281 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1282 struct v4l2_fmtdesc *fmtd)
1283 {
1284 if (fmtd->index != 0)
1285 return -EINVAL;
1286
1287 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1288 strcpy(fmtd->description, "Packed YUY2");
1289 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1290 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1291
1292 return 0;
1293 }
1294
1295 /* Sliced VBI ioctls */
1296 static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
1297 struct v4l2_format *f)
1298 {
1299 struct em28xx_fh *fh = priv;
1300 struct em28xx *dev = fh->dev;
1301 int rc;
1302
1303 rc = check_dev(dev);
1304 if (rc < 0)
1305 return rc;
1306
1307 mutex_lock(&dev->lock);
1308
1309 f->fmt.sliced.service_set = 0;
1310
1311 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1312
1313 if (f->fmt.sliced.service_set == 0)
1314 rc = -EINVAL;
1315
1316 mutex_unlock(&dev->lock);
1317 return rc;
1318 }
1319
1320 static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
1321 struct v4l2_format *f)
1322 {
1323 struct em28xx_fh *fh = priv;
1324 struct em28xx *dev = fh->dev;
1325 int rc;
1326
1327 rc = check_dev(dev);
1328 if (rc < 0)
1329 return rc;
1330
1331 mutex_lock(&dev->lock);
1332 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1333 mutex_unlock(&dev->lock);
1334
1335 if (f->fmt.sliced.service_set == 0)
1336 return -EINVAL;
1337
1338 return 0;
1339 }
1340
1341
1342 static int vidioc_reqbufs(struct file *file, void *priv,
1343 struct v4l2_requestbuffers *rb)
1344 {
1345 struct em28xx_fh *fh = priv;
1346 struct em28xx *dev = fh->dev;
1347 int rc;
1348
1349 rc = check_dev(dev);
1350 if (rc < 0)
1351 return rc;
1352
1353 return (videobuf_reqbufs(&fh->vb_vidq, rb));
1354 }
1355
1356 static int vidioc_querybuf(struct file *file, void *priv,
1357 struct v4l2_buffer *b)
1358 {
1359 struct em28xx_fh *fh = priv;
1360 struct em28xx *dev = fh->dev;
1361 int rc;
1362
1363 rc = check_dev(dev);
1364 if (rc < 0)
1365 return rc;
1366
1367 return (videobuf_querybuf(&fh->vb_vidq, b));
1368 }
1369
1370 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1371 {
1372 struct em28xx_fh *fh = priv;
1373 struct em28xx *dev = fh->dev;
1374 int rc;
1375
1376 rc = check_dev(dev);
1377 if (rc < 0)
1378 return rc;
1379
1380 return (videobuf_qbuf(&fh->vb_vidq, b));
1381 }
1382
1383 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
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 return (videobuf_dqbuf(&fh->vb_vidq, b,
1394 file->f_flags & O_NONBLOCK));
1395 }
1396
1397 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1398 static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
1399 {
1400 struct em28xx_fh *fh = priv;
1401
1402 return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
1403 }
1404 #endif
1405
1406
1407 /* ----------------------------------------------------------- */
1408 /* RADIO ESPECIFIC IOCTLS */
1409 /* ----------------------------------------------------------- */
1410
1411 static int radio_querycap(struct file *file, void *priv,
1412 struct v4l2_capability *cap)
1413 {
1414 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1415
1416 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1417 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1418 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1419
1420 cap->version = EM28XX_VERSION_CODE;
1421 cap->capabilities = V4L2_CAP_TUNER;
1422 return 0;
1423 }
1424
1425 static int radio_g_tuner(struct file *file, void *priv,
1426 struct v4l2_tuner *t)
1427 {
1428 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1429
1430 if (unlikely(t->index > 0))
1431 return -EINVAL;
1432
1433 strcpy(t->name, "Radio");
1434 t->type = V4L2_TUNER_RADIO;
1435
1436 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1437 return 0;
1438 }
1439
1440 static int radio_enum_input(struct file *file, void *priv,
1441 struct v4l2_input *i)
1442 {
1443 if (i->index != 0)
1444 return -EINVAL;
1445 strcpy(i->name, "Radio");
1446 i->type = V4L2_INPUT_TYPE_TUNER;
1447
1448 return 0;
1449 }
1450
1451 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1452 {
1453 if (unlikely(a->index))
1454 return -EINVAL;
1455
1456 strcpy(a->name, "Radio");
1457 return 0;
1458 }
1459
1460 static int radio_s_tuner(struct file *file, void *priv,
1461 struct v4l2_tuner *t)
1462 {
1463 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1464
1465 if (0 != t->index)
1466 return -EINVAL;
1467
1468 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1469
1470 return 0;
1471 }
1472
1473 static int radio_s_audio(struct file *file, void *fh,
1474 struct v4l2_audio *a)
1475 {
1476 return 0;
1477 }
1478
1479 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1480 {
1481 return 0;
1482 }
1483
1484 static int radio_queryctrl(struct file *file, void *priv,
1485 struct v4l2_queryctrl *qc)
1486 {
1487 int i;
1488
1489 if (qc->id < V4L2_CID_BASE ||
1490 qc->id >= V4L2_CID_LASTP1)
1491 return -EINVAL;
1492
1493 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1494 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1495 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1496 return 0;
1497 }
1498 }
1499
1500 return -EINVAL;
1501 }
1502
1503 /*
1504 * em28xx_v4l2_open()
1505 * inits the device and starts isoc transfer
1506 */
1507 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1508 {
1509 int minor = iminor(inode);
1510 int errCode = 0, radio = 0;
1511 struct em28xx *h, *dev = NULL;
1512 struct em28xx_fh *fh;
1513 enum v4l2_buf_type fh_type = 0;
1514
1515 list_for_each_entry(h, &em28xx_devlist, devlist) {
1516 if (h->vdev->minor == minor) {
1517 dev = h;
1518 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1519 }
1520 if (h->vbi_dev->minor == minor) {
1521 dev = h;
1522 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
1523 }
1524 if (h->radio_dev &&
1525 h->radio_dev->minor == minor) {
1526 radio = 1;
1527 dev = h;
1528 }
1529 }
1530 if (NULL == dev)
1531 return -ENODEV;
1532
1533 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1534 minor, v4l2_type_names[fh_type], dev->users);
1535
1536
1537 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1538 if (!fh) {
1539 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1540 return -ENOMEM;
1541 }
1542 mutex_lock(&dev->lock);
1543 fh->dev = dev;
1544 fh->radio = radio;
1545 fh->type = fh_type;
1546 filp->private_data = fh;
1547
1548 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1549 dev->width = norm_maxw(dev);
1550 dev->height = norm_maxh(dev);
1551 dev->hscale = 0;
1552 dev->vscale = 0;
1553
1554 em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
1555 em28xx_set_alternate(dev);
1556 em28xx_resolution_set(dev);
1557
1558 /* Needed, since GPIO might have disabled power of
1559 some i2c device
1560 */
1561 em28xx_config_i2c(dev);
1562
1563 }
1564 if (fh->radio) {
1565 em28xx_videodbg("video_open: setting radio device\n");
1566 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1567 }
1568
1569 dev->users++;
1570
1571 videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
1572 NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
1573 sizeof(struct em28xx_buffer), fh);
1574
1575 mutex_unlock(&dev->lock);
1576
1577 return errCode;
1578 }
1579
1580 /*
1581 * em28xx_realease_resources()
1582 * unregisters the v4l2,i2c and usb devices
1583 * called when the device gets disconected or at module unload
1584 */
1585 static void em28xx_release_resources(struct em28xx *dev)
1586 {
1587
1588 /*FIXME: I2C IR should be disconnected */
1589
1590 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1591 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1592 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1593 list_del(&dev->devlist);
1594 if (dev->sbutton_input_dev)
1595 em28xx_deregister_snapshot_button(dev);
1596 if (dev->radio_dev) {
1597 if (-1 != dev->radio_dev->minor)
1598 video_unregister_device(dev->radio_dev);
1599 else
1600 video_device_release(dev->radio_dev);
1601 dev->radio_dev = NULL;
1602 }
1603 if (dev->vbi_dev) {
1604 if (-1 != dev->vbi_dev->minor)
1605 video_unregister_device(dev->vbi_dev);
1606 else
1607 video_device_release(dev->vbi_dev);
1608 dev->vbi_dev = NULL;
1609 }
1610 if (dev->vdev) {
1611 if (-1 != dev->vdev->minor)
1612 video_unregister_device(dev->vdev);
1613 else
1614 video_device_release(dev->vdev);
1615 dev->vdev = NULL;
1616 }
1617 em28xx_i2c_unregister(dev);
1618 usb_put_dev(dev->udev);
1619
1620 /* Mark device as unused */
1621 em28xx_devused &= ~(1<<dev->devno);
1622 }
1623
1624 /*
1625 * em28xx_v4l2_close()
1626 * stops streaming and deallocates all resources allocated by the v4l2
1627 * calls and ioctls
1628 */
1629 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1630 {
1631 struct em28xx_fh *fh = filp->private_data;
1632 struct em28xx *dev = fh->dev;
1633 int errCode;
1634
1635 em28xx_videodbg("users=%d\n", dev->users);
1636
1637
1638 if (res_check(fh))
1639 res_free(fh);
1640
1641 mutex_lock(&dev->lock);
1642
1643 if (dev->users == 1) {
1644 videobuf_stop(&fh->vb_vidq);
1645 videobuf_mmap_free(&fh->vb_vidq);
1646
1647 /* the device is already disconnect,
1648 free the remaining resources */
1649 if (dev->state & DEV_DISCONNECTED) {
1650 em28xx_release_resources(dev);
1651 mutex_unlock(&dev->lock);
1652 kfree(dev);
1653 return 0;
1654 }
1655
1656 /* do this before setting alternate! */
1657 em28xx_uninit_isoc(dev);
1658 em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
1659
1660 /* set alternate 0 */
1661 dev->alt = 0;
1662 em28xx_videodbg("setting alternate 0\n");
1663 errCode = usb_set_interface(dev->udev, 0, 0);
1664 if (errCode < 0) {
1665 em28xx_errdev("cannot change alternate number to "
1666 "0 (error=%i)\n", errCode);
1667 }
1668 }
1669 kfree(fh);
1670 dev->users--;
1671 wake_up_interruptible_nr(&dev->open, 1);
1672 mutex_unlock(&dev->lock);
1673 return 0;
1674 }
1675
1676 /*
1677 * em28xx_v4l2_read()
1678 * will allocate buffers when called for the first time
1679 */
1680 static ssize_t
1681 em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
1682 loff_t *pos)
1683 {
1684 struct em28xx_fh *fh = filp->private_data;
1685 struct em28xx *dev = fh->dev;
1686 int rc;
1687
1688 rc = check_dev(dev);
1689 if (rc < 0)
1690 return rc;
1691
1692 /* FIXME: read() is not prepared to allow changing the video
1693 resolution while streaming. Seems a bug at em28xx_set_fmt
1694 */
1695
1696 if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1697 if (unlikely(res_get(fh)))
1698 return -EBUSY;
1699
1700 return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
1701 filp->f_flags & O_NONBLOCK);
1702 }
1703 return 0;
1704 }
1705
1706 /*
1707 * em28xx_v4l2_poll()
1708 * will allocate buffers when called for the first time
1709 */
1710 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1711 {
1712 struct em28xx_fh *fh = filp->private_data;
1713 struct em28xx *dev = fh->dev;
1714 int rc;
1715
1716 rc = check_dev(dev);
1717 if (rc < 0)
1718 return rc;
1719
1720 if (unlikely(res_get(fh) < 0))
1721 return POLLERR;
1722
1723 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1724 return POLLERR;
1725
1726 return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
1727 }
1728
1729 /*
1730 * em28xx_v4l2_mmap()
1731 */
1732 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1733 {
1734 struct em28xx_fh *fh = filp->private_data;
1735 struct em28xx *dev = fh->dev;
1736 int rc;
1737
1738 if (unlikely(res_get(fh) < 0))
1739 return -EBUSY;
1740
1741 rc = check_dev(dev);
1742 if (rc < 0)
1743 return rc;
1744
1745 rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1746
1747 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1748 (unsigned long)vma->vm_start,
1749 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1750 rc);
1751
1752 return rc;
1753 }
1754
1755 static const struct file_operations em28xx_v4l_fops = {
1756 .owner = THIS_MODULE,
1757 .open = em28xx_v4l2_open,
1758 .release = em28xx_v4l2_close,
1759 .read = em28xx_v4l2_read,
1760 .poll = em28xx_v4l2_poll,
1761 .mmap = em28xx_v4l2_mmap,
1762 .ioctl = video_ioctl2,
1763 .llseek = no_llseek,
1764 .compat_ioctl = v4l_compat_ioctl32,
1765 };
1766
1767 static const struct v4l2_ioctl_ops video_ioctl_ops = {
1768 .vidioc_querycap = vidioc_querycap,
1769 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1770 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1771 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1772 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1773 .vidioc_g_audio = vidioc_g_audio,
1774 .vidioc_s_audio = vidioc_s_audio,
1775 .vidioc_cropcap = vidioc_cropcap,
1776
1777 .vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap,
1778 .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1779 .vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
1780
1781 .vidioc_reqbufs = vidioc_reqbufs,
1782 .vidioc_querybuf = vidioc_querybuf,
1783 .vidioc_qbuf = vidioc_qbuf,
1784 .vidioc_dqbuf = vidioc_dqbuf,
1785 .vidioc_s_std = vidioc_s_std,
1786 .vidioc_enum_input = vidioc_enum_input,
1787 .vidioc_g_input = vidioc_g_input,
1788 .vidioc_s_input = vidioc_s_input,
1789 .vidioc_queryctrl = vidioc_queryctrl,
1790 .vidioc_g_ctrl = vidioc_g_ctrl,
1791 .vidioc_s_ctrl = vidioc_s_ctrl,
1792 .vidioc_streamon = vidioc_streamon,
1793 .vidioc_streamoff = vidioc_streamoff,
1794 .vidioc_g_tuner = vidioc_g_tuner,
1795 .vidioc_s_tuner = vidioc_s_tuner,
1796 .vidioc_g_frequency = vidioc_g_frequency,
1797 .vidioc_s_frequency = vidioc_s_frequency,
1798 #ifdef CONFIG_VIDEO_ADV_DEBUG
1799 .vidioc_g_register = vidioc_g_register,
1800 .vidioc_s_register = vidioc_s_register,
1801 #endif
1802 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1803 .vidiocgmbuf = vidiocgmbuf,
1804 #endif
1805 };
1806
1807 static const struct video_device em28xx_video_template = {
1808 .fops = &em28xx_v4l_fops,
1809 .release = video_device_release,
1810 .ioctl_ops = &video_ioctl_ops,
1811
1812 .minor = -1,
1813
1814 .tvnorms = V4L2_STD_ALL,
1815 .current_norm = V4L2_STD_PAL,
1816 };
1817
1818 static const struct file_operations radio_fops = {
1819 .owner = THIS_MODULE,
1820 .open = em28xx_v4l2_open,
1821 .release = em28xx_v4l2_close,
1822 .ioctl = video_ioctl2,
1823 .compat_ioctl = v4l_compat_ioctl32,
1824 .llseek = no_llseek,
1825 };
1826
1827 static const struct v4l2_ioctl_ops radio_ioctl_ops = {
1828 .vidioc_querycap = radio_querycap,
1829 .vidioc_g_tuner = radio_g_tuner,
1830 .vidioc_enum_input = radio_enum_input,
1831 .vidioc_g_audio = radio_g_audio,
1832 .vidioc_s_tuner = radio_s_tuner,
1833 .vidioc_s_audio = radio_s_audio,
1834 .vidioc_s_input = radio_s_input,
1835 .vidioc_queryctrl = radio_queryctrl,
1836 .vidioc_g_ctrl = vidioc_g_ctrl,
1837 .vidioc_s_ctrl = vidioc_s_ctrl,
1838 .vidioc_g_frequency = vidioc_g_frequency,
1839 .vidioc_s_frequency = vidioc_s_frequency,
1840 #ifdef CONFIG_VIDEO_ADV_DEBUG
1841 .vidioc_g_register = vidioc_g_register,
1842 .vidioc_s_register = vidioc_s_register,
1843 #endif
1844 };
1845
1846 static struct video_device em28xx_radio_template = {
1847 .name = "em28xx-radio",
1848 .type = VID_TYPE_TUNER,
1849 .fops = &radio_fops,
1850 .ioctl_ops = &radio_ioctl_ops,
1851 .minor = -1,
1852 };
1853
1854 /******************************** usb interface ******************************/
1855
1856
1857 static LIST_HEAD(em28xx_extension_devlist);
1858 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1859
1860 int em28xx_register_extension(struct em28xx_ops *ops)
1861 {
1862 struct em28xx *dev = NULL;
1863
1864 mutex_lock(&em28xx_extension_devlist_lock);
1865 list_add_tail(&ops->next, &em28xx_extension_devlist);
1866 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1867 if (dev)
1868 ops->init(dev);
1869 }
1870 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1871 mutex_unlock(&em28xx_extension_devlist_lock);
1872 return 0;
1873 }
1874 EXPORT_SYMBOL(em28xx_register_extension);
1875
1876 void em28xx_unregister_extension(struct em28xx_ops *ops)
1877 {
1878 struct em28xx *dev = NULL;
1879
1880 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1881 if (dev)
1882 ops->fini(dev);
1883 }
1884
1885 mutex_lock(&em28xx_extension_devlist_lock);
1886 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1887 list_del(&ops->next);
1888 mutex_unlock(&em28xx_extension_devlist_lock);
1889 }
1890 EXPORT_SYMBOL(em28xx_unregister_extension);
1891
1892 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1893 const struct video_device *template,
1894 const int type,
1895 const char *type_name)
1896 {
1897 struct video_device *vfd;
1898
1899 vfd = video_device_alloc();
1900 if (NULL == vfd)
1901 return NULL;
1902 *vfd = *template;
1903 vfd->minor = -1;
1904 vfd->parent = &dev->udev->dev;
1905 vfd->release = video_device_release;
1906 vfd->type = type;
1907 vfd->debug = video_debug;
1908
1909 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1910 dev->name, type_name);
1911
1912 return vfd;
1913 }
1914
1915
1916 /*
1917 * em28xx_init_dev()
1918 * allocates and inits the device structs, registers i2c bus and v4l device
1919 */
1920 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1921 int minor)
1922 {
1923 struct em28xx_ops *ops = NULL;
1924 struct em28xx *dev = *devhandle;
1925 int retval = -ENOMEM;
1926 int errCode;
1927 unsigned int maxh, maxw;
1928
1929 dev->udev = udev;
1930 mutex_init(&dev->lock);
1931 spin_lock_init(&dev->slock);
1932 init_waitqueue_head(&dev->open);
1933 init_waitqueue_head(&dev->wait_frame);
1934 init_waitqueue_head(&dev->wait_stream);
1935
1936 dev->em28xx_write_regs = em28xx_write_regs;
1937 dev->em28xx_read_reg = em28xx_read_reg;
1938 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1939 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1940 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1941 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1942
1943 em28xx_pre_card_setup(dev);
1944
1945 errCode = em28xx_config(dev);
1946 if (errCode) {
1947 em28xx_errdev("error configuring device\n");
1948 em28xx_devused &= ~(1<<dev->devno);
1949 kfree(dev);
1950 return -ENOMEM;
1951 }
1952
1953 /* register i2c bus */
1954 em28xx_i2c_register(dev);
1955
1956 /* Do board specific init and eeprom reading */
1957 em28xx_card_setup(dev);
1958
1959 /* Configure audio */
1960 em28xx_audio_analog_set(dev);
1961
1962 /* configure the device */
1963 em28xx_config_i2c(dev);
1964
1965 /* set default norm */
1966 dev->norm = em28xx_video_template.current_norm;
1967
1968 maxw = norm_maxw(dev);
1969 maxh = norm_maxh(dev);
1970
1971 /* set default image size */
1972 dev->width = maxw;
1973 dev->height = maxh;
1974 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1975 dev->hscale = 0;
1976 dev->vscale = 0;
1977 dev->ctl_input = 2;
1978
1979 errCode = em28xx_config(dev);
1980
1981 list_add_tail(&dev->devlist, &em28xx_devlist);
1982
1983 /* allocate and fill video video_device struct */
1984 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1985 VID_TYPE_CAPTURE, "video");
1986 if (NULL == dev->vdev) {
1987 em28xx_errdev("cannot allocate video_device.\n");
1988 goto fail_unreg;
1989 }
1990 if (dev->tuner_type != TUNER_ABSENT)
1991 dev->vdev->type |= VID_TYPE_TUNER;
1992
1993 /* register v4l2 video video_device */
1994 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1995 video_nr[dev->devno]);
1996 if (retval) {
1997 em28xx_errdev("unable to register video device (error=%i).\n",
1998 retval);
1999 goto fail_unreg;
2000 }
2001
2002 /* Allocate and fill vbi video_device struct */
2003 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
2004 VFL_TYPE_VBI, "vbi");
2005 /* register v4l2 vbi video_device */
2006 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
2007 vbi_nr[dev->devno]) < 0) {
2008 em28xx_errdev("unable to register vbi device\n");
2009 retval = -ENODEV;
2010 goto fail_unreg;
2011 }
2012
2013 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
2014 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
2015 VFL_TYPE_RADIO, "radio");
2016 if (NULL == dev->radio_dev) {
2017 em28xx_errdev("cannot allocate video_device.\n");
2018 goto fail_unreg;
2019 }
2020 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2021 radio_nr[dev->devno]);
2022 if (retval < 0) {
2023 em28xx_errdev("can't register radio device\n");
2024 goto fail_unreg;
2025 }
2026 em28xx_info("Registered radio device as /dev/radio%d\n",
2027 dev->radio_dev->minor & 0x1f);
2028 }
2029
2030 /* init video dma queues */
2031 INIT_LIST_HEAD(&dev->vidq.active);
2032 INIT_LIST_HEAD(&dev->vidq.queued);
2033
2034
2035 if (dev->has_msp34xx) {
2036 /* Send a reset to other chips via gpio */
2037 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2038 msleep(3);
2039 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2040 msleep(3);
2041 }
2042
2043 video_mux(dev, 0);
2044
2045 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2046 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2047 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2048
2049 mutex_lock(&em28xx_extension_devlist_lock);
2050 if (!list_empty(&em28xx_extension_devlist)) {
2051 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2052 if (ops->id)
2053 ops->init(dev);
2054 }
2055 }
2056 mutex_unlock(&em28xx_extension_devlist_lock);
2057
2058 return 0;
2059
2060 fail_unreg:
2061 em28xx_release_resources(dev);
2062 mutex_unlock(&dev->lock);
2063 kfree(dev);
2064 return retval;
2065 }
2066
2067 #if defined(CONFIG_MODULES) && defined(MODULE)
2068 static void request_module_async(struct work_struct *work)
2069 {
2070 struct em28xx *dev = container_of(work,
2071 struct em28xx, request_module_wk);
2072
2073 if (dev->has_audio_class)
2074 request_module("snd-usb-audio");
2075 else
2076 request_module("em28xx-alsa");
2077
2078 if (dev->has_dvb)
2079 request_module("em28xx-dvb");
2080 }
2081
2082 static void request_modules(struct em28xx *dev)
2083 {
2084 INIT_WORK(&dev->request_module_wk, request_module_async);
2085 schedule_work(&dev->request_module_wk);
2086 }
2087 #else
2088 #define request_modules(dev)
2089 #endif /* CONFIG_MODULES */
2090
2091 /*
2092 * em28xx_usb_probe()
2093 * checks for supported devices
2094 */
2095 static int em28xx_usb_probe(struct usb_interface *interface,
2096 const struct usb_device_id *id)
2097 {
2098 const struct usb_endpoint_descriptor *endpoint;
2099 struct usb_device *udev;
2100 struct usb_interface *uif;
2101 struct em28xx *dev = NULL;
2102 int retval = -ENODEV;
2103 int i, nr, ifnum;
2104
2105 udev = usb_get_dev(interface_to_usbdev(interface));
2106 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2107
2108 /* Check to see next free device and mark as used */
2109 nr = find_first_zero_bit(&em28xx_devused, EM28XX_MAXBOARDS);
2110 em28xx_devused |= 1<<nr;
2111
2112 /* Don't register audio interfaces */
2113 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2114 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2115 udev->descriptor.idVendor,
2116 udev->descriptor.idProduct,
2117 ifnum,
2118 interface->altsetting[0].desc.bInterfaceClass);
2119
2120 em28xx_devused &= ~(1<<nr);
2121 return -ENODEV;
2122 }
2123
2124 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2125 udev->descriptor.idVendor,
2126 udev->descriptor.idProduct,
2127 ifnum,
2128 interface->altsetting[0].desc.bInterfaceClass);
2129
2130 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2131
2132 /* check if the device has the iso in endpoint at the correct place */
2133 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2134 USB_ENDPOINT_XFER_ISOC) {
2135 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2136 em28xx_devused &= ~(1<<nr);
2137 return -ENODEV;
2138 }
2139 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2140 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2141 em28xx_devused &= ~(1<<nr);
2142 return -ENODEV;
2143 }
2144
2145 if (nr >= EM28XX_MAXBOARDS) {
2146 printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
2147 EM28XX_MAXBOARDS);
2148 em28xx_devused &= ~(1<<nr);
2149 return -ENOMEM;
2150 }
2151
2152 /* allocate memory for our device state and initialize it */
2153 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2154 if (dev == NULL) {
2155 em28xx_err(DRIVER_NAME ": out of memory!\n");
2156 em28xx_devused &= ~(1<<nr);
2157 return -ENOMEM;
2158 }
2159
2160 snprintf(dev->name, 29, "em28xx #%d", nr);
2161 dev->devno = nr;
2162 dev->model = id->driver_info;
2163 dev->alt = -1;
2164
2165 /* Checks if audio is provided by some interface */
2166 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2167 uif = udev->config->interface[i];
2168 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2169 dev->has_audio_class = 1;
2170 break;
2171 }
2172 }
2173
2174 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2175 dev->has_audio_class ? "Has" : "Doesn't have");
2176
2177 /* compute alternate max packet sizes */
2178 uif = udev->actconfig->interface[0];
2179
2180 dev->num_alt = uif->num_altsetting;
2181 em28xx_info("Alternate settings: %i\n", dev->num_alt);
2182 /* dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2183 dev->alt_max_pkt_size = kmalloc(32 * dev->num_alt, GFP_KERNEL);
2184
2185 if (dev->alt_max_pkt_size == NULL) {
2186 em28xx_errdev("out of memory!\n");
2187 em28xx_devused &= ~(1<<nr);
2188 kfree(dev);
2189 return -ENOMEM;
2190 }
2191
2192 for (i = 0; i < dev->num_alt ; i++) {
2193 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2194 wMaxPacketSize);
2195 dev->alt_max_pkt_size[i] =
2196 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2197 em28xx_info("Alternate setting %i, max size= %i\n", i,
2198 dev->alt_max_pkt_size[i]);
2199 }
2200
2201 if ((card[nr] >= 0) && (card[nr] < em28xx_bcount))
2202 dev->model = card[nr];
2203
2204 /* allocate device struct */
2205 retval = em28xx_init_dev(&dev, udev, nr);
2206 if (retval)
2207 return retval;
2208
2209 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2210
2211 /* save our data pointer in this interface device */
2212 usb_set_intfdata(interface, dev);
2213
2214 request_modules(dev);
2215
2216 return 0;
2217 }
2218
2219 /*
2220 * em28xx_usb_disconnect()
2221 * called when the device gets diconencted
2222 * video device will be unregistered on v4l2_close in case it is still open
2223 */
2224 static void em28xx_usb_disconnect(struct usb_interface *interface)
2225 {
2226 struct em28xx *dev;
2227 struct em28xx_ops *ops = NULL;
2228
2229 dev = usb_get_intfdata(interface);
2230 usb_set_intfdata(interface, NULL);
2231
2232 if (!dev)
2233 return;
2234
2235 em28xx_info("disconnecting %s\n", dev->vdev->name);
2236
2237 /* wait until all current v4l2 io is finished then deallocate
2238 resources */
2239 mutex_lock(&dev->lock);
2240
2241 wake_up_interruptible_all(&dev->open);
2242
2243 if (dev->users) {
2244 em28xx_warn
2245 ("device /dev/video%d is open! Deregistration and memory "
2246 "deallocation are deferred on close.\n",
2247 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2248
2249 dev->state |= DEV_MISCONFIGURED;
2250 em28xx_uninit_isoc(dev);
2251 dev->state |= DEV_DISCONNECTED;
2252 wake_up_interruptible(&dev->wait_frame);
2253 wake_up_interruptible(&dev->wait_stream);
2254 } else {
2255 dev->state |= DEV_DISCONNECTED;
2256 em28xx_release_resources(dev);
2257 }
2258 mutex_unlock(&dev->lock);
2259
2260 mutex_lock(&em28xx_extension_devlist_lock);
2261 if (!list_empty(&em28xx_extension_devlist)) {
2262 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2263 ops->fini(dev);
2264 }
2265 }
2266 mutex_unlock(&em28xx_extension_devlist_lock);
2267
2268 if (!dev->users) {
2269 kfree(dev->alt_max_pkt_size);
2270 kfree(dev);
2271 }
2272 }
2273
2274 static struct usb_driver em28xx_usb_driver = {
2275 .name = "em28xx",
2276 .probe = em28xx_usb_probe,
2277 .disconnect = em28xx_usb_disconnect,
2278 .id_table = em28xx_id_table,
2279 };
2280
2281 static int __init em28xx_module_init(void)
2282 {
2283 int result;
2284
2285 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2286 (EM28XX_VERSION_CODE >> 16) & 0xff,
2287 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2288 #ifdef SNAPSHOT
2289 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2290 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2291 #endif
2292
2293 /* register this driver with the USB subsystem */
2294 result = usb_register(&em28xx_usb_driver);
2295 if (result)
2296 em28xx_err(DRIVER_NAME
2297 " usb_register failed. Error number %d.\n", result);
2298
2299 return result;
2300 }
2301
2302 static void __exit em28xx_module_exit(void)
2303 {
2304 /* deregister this driver with the USB subsystem */
2305 usb_deregister(&em28xx_usb_driver);
2306 }
2307
2308 module_init(em28xx_module_init);
2309 module_exit(em28xx_module_exit);
kernel source for telekom puls (alcatel/mediatek)