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V4L/DVB (7163): em28xx: makes audio settings more stable
[deliverable/linux.git] / drivers / media / video / em28xx / em28xx-video.c
1 /*
2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
3
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
8
9 Some parts based on SN9C10x PC Camera Controllers GPL driver made
10 by Luca Risolia <luca.risolia@studio.unibo.it>
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26
27 #include <linux/init.h>
28 #include <linux/list.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/bitmap.h>
32 #include <linux/usb.h>
33 #include <linux/i2c.h>
34 #include <linux/version.h>
35 #include <linux/mm.h>
36 #include <linux/mutex.h>
37
38 #include "em28xx.h"
39 #include <media/v4l2-common.h>
40 #include <media/msp3400.h>
41 #include <media/tuner.h>
42
43 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
44 "Markus Rechberger <mrechberger@gmail.com>, " \
45 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
46 "Sascha Sommer <saschasommer@freenet.de>"
47
48 #define DRIVER_NAME "em28xx"
49 #define DRIVER_DESC "Empia em28xx based USB video device driver"
50 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
51
52 #define em28xx_videodbg(fmt, arg...) do {\
53 if (video_debug) \
54 printk(KERN_INFO "%s %s :"fmt, \
55 dev->name, __FUNCTION__ , ##arg); } while (0)
56
57 MODULE_AUTHOR(DRIVER_AUTHOR);
58 MODULE_DESCRIPTION(DRIVER_DESC);
59 MODULE_LICENSE("GPL");
60
61 static LIST_HEAD(em28xx_devlist);
62
63 static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
64 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
65 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
66 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
67
68 module_param_array(card, int, NULL, 0444);
69 module_param_array(video_nr, int, NULL, 0444);
70 module_param_array(vbi_nr, int, NULL, 0444);
71 module_param_array(radio_nr, int, NULL, 0444);
72 MODULE_PARM_DESC(card, "card type");
73 MODULE_PARM_DESC(video_nr, "video device numbers");
74 MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
75 MODULE_PARM_DESC(radio_nr, "radio device numbers");
76
77 static unsigned int video_debug = 0;
78 module_param(video_debug,int,0644);
79 MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
80
81 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
82 static unsigned long em28xx_devused;
83
84 /* supported controls */
85 /* Common to all boards */
86 static struct v4l2_queryctrl em28xx_qctrl[] = {
87 {
88 .id = V4L2_CID_AUDIO_VOLUME,
89 .type = V4L2_CTRL_TYPE_INTEGER,
90 .name = "Volume",
91 .minimum = 0x0,
92 .maximum = 0x1f,
93 .step = 0x1,
94 .default_value = 0x1f,
95 .flags = 0,
96 },{
97 .id = V4L2_CID_AUDIO_MUTE,
98 .type = V4L2_CTRL_TYPE_BOOLEAN,
99 .name = "Mute",
100 .minimum = 0,
101 .maximum = 1,
102 .step = 1,
103 .default_value = 1,
104 .flags = 0,
105 }
106 };
107
108 static struct usb_driver em28xx_usb_driver;
109
110
111 /********************* v4l2 interface ******************************************/
112
113 /*
114 * em28xx_config()
115 * inits registers with sane defaults
116 */
117 static int em28xx_config(struct em28xx *dev)
118 {
119
120 /* Sets I2C speed to 100 KHz */
121 if (!dev->is_em2800)
122 em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
123
124 /* enable vbi capturing */
125
126 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
127 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
128 em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
129
130 dev->mute = 1; /* maybe not the right place... */
131 dev->volume = 0x1f;
132
133 em28xx_outfmt_set_yuv422(dev);
134 em28xx_colorlevels_set_default(dev);
135 em28xx_compression_disable(dev);
136
137 return 0;
138 }
139
140 /*
141 * em28xx_config_i2c()
142 * configure i2c attached devices
143 */
144 static void em28xx_config_i2c(struct em28xx *dev)
145 {
146 struct v4l2_routing route;
147
148 route.input = INPUT(dev->ctl_input)->vmux;
149 route.output = 0;
150 em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
151 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
152 em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
153 }
154
155 /*
156 * em28xx_empty_framequeues()
157 * prepare queues for incoming and outgoing frames
158 */
159 static void em28xx_empty_framequeues(struct em28xx *dev)
160 {
161 u32 i;
162
163 INIT_LIST_HEAD(&dev->inqueue);
164 INIT_LIST_HEAD(&dev->outqueue);
165
166 for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
167 dev->frame[i].state = F_UNUSED;
168 dev->frame[i].buf.bytesused = 0;
169 }
170 }
171
172 static void video_mux(struct em28xx *dev, int index)
173 {
174 struct v4l2_routing route;
175
176 route.input = INPUT(index)->vmux;
177 route.output = 0;
178 dev->ctl_input = index;
179 dev->ctl_ainput = INPUT(index)->amux;
180
181 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
182
183 if (dev->has_msp34xx) {
184 if (dev->i2s_speed)
185 em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
186 route.input = dev->ctl_ainput;
187 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
188 /* Note: this is msp3400 specific */
189 em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
190 }
191
192 em28xx_audio_analog_set(dev);
193 }
194
195 /* Usage lock check functions */
196 static int res_get(struct em28xx_fh *fh)
197 {
198 struct em28xx *dev = fh->dev;
199 int rc = 0;
200
201 /* This instance already has stream_on */
202 if (fh->stream_on)
203 return rc;
204
205 mutex_lock(&dev->lock);
206
207 if (dev->stream_on)
208 rc = -EINVAL;
209 else {
210 dev->stream_on = 1;
211 fh->stream_on = 1;
212 }
213
214 mutex_unlock(&dev->lock);
215 return rc;
216 }
217
218 static int res_check(struct em28xx_fh *fh)
219 {
220 return (fh->stream_on);
221 }
222
223 static void res_free(struct em28xx_fh *fh)
224 {
225 struct em28xx *dev = fh->dev;
226
227 mutex_lock(&dev->lock);
228 fh->stream_on = 0;
229 dev->stream_on = 0;
230 mutex_unlock(&dev->lock);
231 }
232
233 /*
234 * em28xx_vm_open()
235 */
236 static void em28xx_vm_open(struct vm_area_struct *vma)
237 {
238 struct em28xx_frame_t *f = vma->vm_private_data;
239 f->vma_use_count++;
240 }
241
242 /*
243 * em28xx_vm_close()
244 */
245 static void em28xx_vm_close(struct vm_area_struct *vma)
246 {
247 /* NOTE: buffers are not freed here */
248 struct em28xx_frame_t *f = vma->vm_private_data;
249
250 if (f->vma_use_count)
251 f->vma_use_count--;
252 }
253
254 static struct vm_operations_struct em28xx_vm_ops = {
255 .open = em28xx_vm_open,
256 .close = em28xx_vm_close,
257 };
258
259
260 /*
261 * em28xx_get_ctrl()
262 * return the current saturation, brightness or contrast, mute state
263 */
264 static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
265 {
266 switch (ctrl->id) {
267 case V4L2_CID_AUDIO_MUTE:
268 ctrl->value = dev->mute;
269 return 0;
270 case V4L2_CID_AUDIO_VOLUME:
271 ctrl->value = dev->volume;
272 return 0;
273 default:
274 return -EINVAL;
275 }
276 }
277
278 /*
279 * em28xx_set_ctrl()
280 * mute or set new saturation, brightness or contrast
281 */
282 static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
283 {
284 switch (ctrl->id) {
285 case V4L2_CID_AUDIO_MUTE:
286 if (ctrl->value != dev->mute) {
287 dev->mute = ctrl->value;
288 return em28xx_audio_analog_set(dev);
289 }
290 return 0;
291 case V4L2_CID_AUDIO_VOLUME:
292 dev->volume = ctrl->value;
293 return em28xx_audio_analog_set(dev);
294 default:
295 return -EINVAL;
296 }
297 }
298
299 /*
300 * em28xx_stream_interrupt()
301 * stops streaming
302 */
303 static int em28xx_stream_interrupt(struct em28xx *dev)
304 {
305 int rc = 0;
306
307 /* stop reading from the device */
308
309 dev->stream = STREAM_INTERRUPT;
310 rc = wait_event_timeout(dev->wait_stream,
311 (dev->stream == STREAM_OFF) ||
312 (dev->state & DEV_DISCONNECTED),
313 EM28XX_URB_TIMEOUT);
314
315 if (rc) {
316 dev->state |= DEV_MISCONFIGURED;
317 em28xx_videodbg("device is misconfigured; close and "
318 "open /dev/video%d again\n",
319 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
320 return rc;
321 }
322
323 return 0;
324 }
325
326
327 static int check_dev(struct em28xx *dev)
328 {
329 if (dev->state & DEV_DISCONNECTED) {
330 em28xx_errdev("v4l2 ioctl: device not present\n");
331 return -ENODEV;
332 }
333
334 if (dev->state & DEV_MISCONFIGURED) {
335 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
336 "close and open it again\n");
337 return -EIO;
338 }
339 return 0;
340 }
341
342 static void get_scale(struct em28xx *dev,
343 unsigned int width, unsigned int height,
344 unsigned int *hscale, unsigned int *vscale)
345 {
346 unsigned int maxw = norm_maxw(dev);
347 unsigned int maxh = norm_maxh(dev);
348
349 *hscale = (((unsigned long)maxw) << 12) / width - 4096L;
350 if (*hscale >= 0x4000)
351 *hscale = 0x3fff;
352
353 *vscale = (((unsigned long)maxh) << 12) / height - 4096L;
354 if (*vscale >= 0x4000)
355 *vscale = 0x3fff;
356 }
357
358 /* ------------------------------------------------------------------
359 IOCTL vidioc handling
360 ------------------------------------------------------------------*/
361
362 static int vidioc_g_fmt_cap(struct file *file, void *priv,
363 struct v4l2_format *f)
364 {
365 struct em28xx_fh *fh = priv;
366 struct em28xx *dev = fh->dev;
367
368 mutex_lock(&dev->lock);
369
370 f->fmt.pix.width = dev->width;
371 f->fmt.pix.height = dev->height;
372 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
373 f->fmt.pix.bytesperline = dev->bytesperline;
374 f->fmt.pix.sizeimage = dev->frame_size;
375 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
376
377 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
378 f->fmt.pix.field = dev->interlaced ?
379 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
380
381 mutex_unlock(&dev->lock);
382 return 0;
383 }
384
385 static int vidioc_try_fmt_cap(struct file *file, void *priv,
386 struct v4l2_format *f)
387 {
388 struct em28xx_fh *fh = priv;
389 struct em28xx *dev = fh->dev;
390 int width = f->fmt.pix.width;
391 int height = f->fmt.pix.height;
392 unsigned int maxw = norm_maxw(dev);
393 unsigned int maxh = norm_maxh(dev);
394 unsigned int hscale, vscale;
395
396 /* width must even because of the YUYV format
397 height must be even because of interlacing */
398 height &= 0xfffe;
399 width &= 0xfffe;
400
401 if (height < 32)
402 height = 32;
403 if (height > maxh)
404 height = maxh;
405 if (width < 48)
406 width = 48;
407 if (width > maxw)
408 width = maxw;
409
410 mutex_lock(&dev->lock);
411
412 if (dev->is_em2800) {
413 /* the em2800 can only scale down to 50% */
414 if (height % (maxh / 2))
415 height = maxh;
416 if (width % (maxw / 2))
417 width = maxw;
418 /* according to empiatech support */
419 /* the MaxPacketSize is to small to support */
420 /* framesizes larger than 640x480 @ 30 fps */
421 /* or 640x576 @ 25 fps. As this would cut */
422 /* of a part of the image we prefer */
423 /* 360x576 or 360x480 for now */
424 if (width == maxw && height == maxh)
425 width /= 2;
426 }
427
428 get_scale(dev, width, height, &hscale, &vscale);
429
430 width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
431 height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
432
433 f->fmt.pix.width = width;
434 f->fmt.pix.height = height;
435 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
436 f->fmt.pix.bytesperline = width * 2;
437 f->fmt.pix.sizeimage = width * 2 * height;
438 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
439 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
440
441 mutex_unlock(&dev->lock);
442 return 0;
443 }
444
445 static int vidioc_s_fmt_cap(struct file *file, void *priv,
446 struct v4l2_format *f)
447 {
448 struct em28xx_fh *fh = priv;
449 struct em28xx *dev = fh->dev;
450 int rc, i;
451
452 rc = check_dev(dev);
453 if (rc < 0)
454 return rc;
455
456 vidioc_try_fmt_cap(file, priv, f);
457
458 mutex_lock(&dev->lock);
459
460 for (i = 0; i < dev->num_frames; i++)
461 if (dev->frame[i].vma_use_count) {
462 em28xx_videodbg("VIDIOC_S_FMT failed. "
463 "Unmap the buffers first.\n");
464 rc = -EINVAL;
465 goto err;
466 }
467
468 /* stop io in case it is already in progress */
469 if (dev->stream == STREAM_ON) {
470 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
471 rc = em28xx_stream_interrupt(dev);
472 if (rc < 0)
473 goto err;
474 }
475
476 em28xx_release_buffers(dev);
477 dev->io = IO_NONE;
478
479 /* set new image size */
480 dev->width = f->fmt.pix.width;
481 dev->height = f->fmt.pix.height;
482 dev->frame_size = dev->width * dev->height * 2;
483 dev->field_size = dev->frame_size >> 1;
484 dev->bytesperline = dev->width * 2;
485 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
486
487 /* FIXME: This is really weird! Why capture is starting with
488 this ioctl ???
489 */
490 em28xx_uninit_isoc(dev);
491 em28xx_set_alternate(dev);
492 em28xx_capture_start(dev, 1);
493 em28xx_resolution_set(dev);
494 em28xx_init_isoc(dev);
495 rc = 0;
496
497 err:
498 mutex_unlock(&dev->lock);
499 return rc;
500 }
501
502 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
503 {
504 struct em28xx_fh *fh = priv;
505 struct em28xx *dev = fh->dev;
506 struct v4l2_format f;
507 int rc;
508
509 rc = check_dev(dev);
510 if (rc < 0)
511 return rc;
512
513 mutex_lock(&dev->lock);
514 dev->norm = *norm;
515 mutex_unlock(&dev->lock);
516
517 /* Adjusts width/height, if needed */
518 f.fmt.pix.width = dev->width;
519 f.fmt.pix.height = dev->height;
520 vidioc_try_fmt_cap(file, priv, &f);
521
522 mutex_lock(&dev->lock);
523
524 /* set new image size */
525 dev->width = f.fmt.pix.width;
526 dev->height = f.fmt.pix.height;
527 dev->frame_size = dev->width * dev->height * 2;
528 dev->field_size = dev->frame_size >> 1;
529 dev->bytesperline = dev->width * 2;
530 get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
531
532 em28xx_resolution_set(dev);
533 em28xx_i2c_call_clients(dev, VIDIOC_S_STD, &dev->norm);
534
535 mutex_unlock(&dev->lock);
536 return 0;
537 }
538
539 static const char *iname[] = {
540 [EM28XX_VMUX_COMPOSITE1] = "Composite1",
541 [EM28XX_VMUX_COMPOSITE2] = "Composite2",
542 [EM28XX_VMUX_COMPOSITE3] = "Composite3",
543 [EM28XX_VMUX_COMPOSITE4] = "Composite4",
544 [EM28XX_VMUX_SVIDEO] = "S-Video",
545 [EM28XX_VMUX_TELEVISION] = "Television",
546 [EM28XX_VMUX_CABLE] = "Cable TV",
547 [EM28XX_VMUX_DVB] = "DVB",
548 [EM28XX_VMUX_DEBUG] = "for debug only",
549 };
550
551 static int vidioc_enum_input(struct file *file, void *priv,
552 struct v4l2_input *i)
553 {
554 struct em28xx_fh *fh = priv;
555 struct em28xx *dev = fh->dev;
556 unsigned int n;
557
558 n = i->index;
559 if (n >= MAX_EM28XX_INPUT)
560 return -EINVAL;
561 if (0 == INPUT(n)->type)
562 return -EINVAL;
563
564 i->index = n;
565 i->type = V4L2_INPUT_TYPE_CAMERA;
566
567 strcpy(i->name, iname[INPUT(n)->type]);
568
569 if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
570 (EM28XX_VMUX_CABLE == INPUT(n)->type))
571 i->type = V4L2_INPUT_TYPE_TUNER;
572
573 i->std = dev->vdev->tvnorms;
574
575 return 0;
576 }
577
578 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
579 {
580 struct em28xx_fh *fh = priv;
581 struct em28xx *dev = fh->dev;
582
583 *i = dev->ctl_input;
584
585 return 0;
586 }
587
588 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
589 {
590 struct em28xx_fh *fh = priv;
591 struct em28xx *dev = fh->dev;
592 int rc;
593
594 rc = check_dev(dev);
595 if (rc < 0)
596 return rc;
597
598 if (i >= MAX_EM28XX_INPUT)
599 return -EINVAL;
600 if (0 == INPUT(i)->type)
601 return -EINVAL;
602
603 mutex_lock(&dev->lock);
604
605 video_mux(dev, i);
606
607 mutex_unlock(&dev->lock);
608 return 0;
609 }
610
611 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
612 {
613 struct em28xx_fh *fh = priv;
614 struct em28xx *dev = fh->dev;
615 unsigned int index = a->index;
616
617 if (a->index > 1)
618 return -EINVAL;
619
620 index = dev->ctl_ainput;
621
622 if (index == 0) {
623 strcpy(a->name, "Television");
624 } else {
625 strcpy(a->name, "Line In");
626 }
627 a->capability = V4L2_AUDCAP_STEREO;
628 a->index = index;
629
630 return 0;
631 }
632
633 static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
634 {
635 struct em28xx_fh *fh = priv;
636 struct em28xx *dev = fh->dev;
637
638 if (a->index != dev->ctl_ainput)
639 return -EINVAL;
640
641 return 0;
642 }
643
644 static int vidioc_queryctrl(struct file *file, void *priv,
645 struct v4l2_queryctrl *qc)
646 {
647 struct em28xx_fh *fh = priv;
648 struct em28xx *dev = fh->dev;
649 int id = qc->id;
650 int i;
651 int rc;
652
653 rc = check_dev(dev);
654 if (rc < 0)
655 return rc;
656
657 memset(qc, 0, sizeof(*qc));
658
659 qc->id = id;
660
661 if (!dev->has_msp34xx) {
662 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
663 if (qc->id && qc->id == em28xx_qctrl[i].id) {
664 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
665 return 0;
666 }
667 }
668 }
669 mutex_lock(&dev->lock);
670 em28xx_i2c_call_clients(dev, VIDIOC_QUERYCTRL, qc);
671 mutex_unlock(&dev->lock);
672
673 if (qc->type)
674 return 0;
675 else
676 return -EINVAL;
677 }
678
679 static int vidioc_g_ctrl(struct file *file, void *priv,
680 struct v4l2_control *ctrl)
681 {
682 struct em28xx_fh *fh = priv;
683 struct em28xx *dev = fh->dev;
684 int rc;
685
686 rc = check_dev(dev);
687 if (rc < 0)
688 return rc;
689 mutex_lock(&dev->lock);
690
691 if (!dev->has_msp34xx)
692 rc = em28xx_get_ctrl(dev, ctrl);
693 else
694 rc = -EINVAL;
695
696 if (rc == -EINVAL) {
697 em28xx_i2c_call_clients(dev, VIDIOC_G_CTRL, ctrl);
698 rc = 0;
699 }
700
701 mutex_unlock(&dev->lock);
702 return rc;
703 }
704
705 static int vidioc_s_ctrl(struct file *file, void *priv,
706 struct v4l2_control *ctrl)
707 {
708 struct em28xx_fh *fh = priv;
709 struct em28xx *dev = fh->dev;
710 u8 i;
711 int rc;
712
713 rc = check_dev(dev);
714 if (rc < 0)
715 return rc;
716
717 mutex_lock(&dev->lock);
718
719 if (dev->has_msp34xx)
720 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
721 else {
722 rc = 1;
723 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
724 if (ctrl->id == em28xx_qctrl[i].id) {
725 if (ctrl->value < em28xx_qctrl[i].minimum ||
726 ctrl->value > em28xx_qctrl[i].maximum) {
727 rc = -ERANGE;
728 break;
729 }
730
731 rc = em28xx_set_ctrl(dev, ctrl);
732 break;
733 }
734 }
735 }
736
737 /* Control not found - try to send it to the attached devices */
738 if (rc == 1) {
739 em28xx_i2c_call_clients(dev, VIDIOC_S_CTRL, ctrl);
740 rc = 0;
741 }
742
743 mutex_unlock(&dev->lock);
744 return rc;
745 }
746
747 static int vidioc_g_tuner(struct file *file, void *priv,
748 struct v4l2_tuner *t)
749 {
750 struct em28xx_fh *fh = priv;
751 struct em28xx *dev = fh->dev;
752 int rc;
753
754 rc = check_dev(dev);
755 if (rc < 0)
756 return rc;
757
758 if (0 != t->index)
759 return -EINVAL;
760
761 strcpy(t->name, "Tuner");
762
763 mutex_lock(&dev->lock);
764
765 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
766
767 mutex_unlock(&dev->lock);
768 return 0;
769 }
770
771 static int vidioc_s_tuner(struct file *file, void *priv,
772 struct v4l2_tuner *t)
773 {
774 struct em28xx_fh *fh = priv;
775 struct em28xx *dev = fh->dev;
776 int rc;
777
778 rc = check_dev(dev);
779 if (rc < 0)
780 return rc;
781
782 if (0 != t->index)
783 return -EINVAL;
784
785 mutex_lock(&dev->lock);
786
787 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
788
789 mutex_unlock(&dev->lock);
790 return 0;
791 }
792
793 static int vidioc_g_frequency(struct file *file, void *priv,
794 struct v4l2_frequency *f)
795 {
796 struct em28xx_fh *fh = priv;
797 struct em28xx *dev = fh->dev;
798
799 f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
800 f->frequency = dev->ctl_freq;
801
802 return 0;
803 }
804
805 static int vidioc_s_frequency(struct file *file, void *priv,
806 struct v4l2_frequency *f)
807 {
808 struct em28xx_fh *fh = priv;
809 struct em28xx *dev = fh->dev;
810 int rc;
811
812 rc = check_dev(dev);
813 if (rc < 0)
814 return rc;
815
816 if (0 != f->tuner)
817 return -EINVAL;
818
819 if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
820 return -EINVAL;
821 if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
822 return -EINVAL;
823
824 mutex_lock(&dev->lock);
825
826 dev->ctl_freq = f->frequency;
827 em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
828
829 mutex_unlock(&dev->lock);
830 return 0;
831 }
832
833 #ifdef CONFIG_VIDEO_ADV_DEBUG
834 static int em28xx_reg_len(int reg)
835 {
836 switch (reg) {
837 case AC97LSB_REG:
838 case HSCALELOW_REG:
839 case VSCALELOW_REG:
840 return 2;
841 default:
842 return 1;
843 }
844 }
845
846 static int vidioc_g_register(struct file *file, void *priv,
847 struct v4l2_register *reg)
848 {
849 struct em28xx_fh *fh = priv;
850 struct em28xx *dev = fh->dev;
851 int ret;
852
853 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
854 return -EINVAL;
855
856 if (em28xx_reg_len(reg->reg) == 1) {
857 ret = em28xx_read_reg(dev, reg->reg);
858 if (ret < 0)
859 return ret;
860
861 reg->val = ret;
862 } else {
863 u64 val = 0;
864 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
865 reg->reg, (char *)&val, 2);
866 if (ret < 0)
867 return ret;
868
869 reg->val = cpu_to_le64((__u64)val);
870 }
871
872 return 0;
873 }
874
875 static int vidioc_s_register(struct file *file, void *priv,
876 struct v4l2_register *reg)
877 {
878 struct em28xx_fh *fh = priv;
879 struct em28xx *dev = fh->dev;
880 u64 buf;
881
882 buf = le64_to_cpu((__u64)reg->val);
883
884 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
885 em28xx_reg_len(reg->reg));
886 }
887 #endif
888
889
890 static int vidioc_cropcap(struct file *file, void *priv,
891 struct v4l2_cropcap *cc)
892 {
893 struct em28xx_fh *fh = priv;
894 struct em28xx *dev = fh->dev;
895
896 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
897 return -EINVAL;
898
899 cc->bounds.left = 0;
900 cc->bounds.top = 0;
901 cc->bounds.width = dev->width;
902 cc->bounds.height = dev->height;
903 cc->defrect = cc->bounds;
904 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
905 cc->pixelaspect.denominator = 59;
906
907 return 0;
908 }
909
910 static int vidioc_streamon(struct file *file, void *priv,
911 enum v4l2_buf_type type)
912 {
913 struct em28xx_fh *fh = priv;
914 struct em28xx *dev = fh->dev;
915 int rc;
916
917 rc = check_dev(dev);
918 if (rc < 0)
919 return rc;
920
921 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
922 return -EINVAL;
923
924 if (list_empty(&dev->inqueue))
925 return -EINVAL;
926
927 mutex_lock(&dev->lock);
928
929 if (unlikely(res_get(fh) < 0)) {
930 mutex_unlock(&dev->lock);
931 return -EBUSY;
932 }
933
934 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
935
936 mutex_unlock(&dev->lock);
937 return 0;
938 }
939
940 static int vidioc_streamoff(struct file *file, void *priv,
941 enum v4l2_buf_type type)
942 {
943 struct em28xx_fh *fh = priv;
944 struct em28xx *dev = fh->dev;
945 int rc;
946
947 rc = check_dev(dev);
948 if (rc < 0)
949 return rc;
950
951 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
952 return -EINVAL;
953
954 mutex_lock(&dev->lock);
955
956 if (dev->stream == STREAM_ON) {
957 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
958 rc = em28xx_stream_interrupt(dev);
959 if (rc < 0) {
960 mutex_unlock(&dev->lock);
961 return rc;
962 }
963 }
964
965 em28xx_empty_framequeues(dev);
966
967 mutex_unlock(&dev->lock);
968 return 0;
969 }
970
971 static int vidioc_querycap(struct file *file, void *priv,
972 struct v4l2_capability *cap)
973 {
974 struct em28xx_fh *fh = priv;
975 struct em28xx *dev = fh->dev;
976
977 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
978 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
979 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
980
981 cap->version = EM28XX_VERSION_CODE;
982
983 cap->capabilities =
984 V4L2_CAP_SLICED_VBI_CAPTURE |
985 V4L2_CAP_VIDEO_CAPTURE |
986 V4L2_CAP_AUDIO |
987 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
988
989 if (dev->tuner_type != TUNER_ABSENT)
990 cap->capabilities |= V4L2_CAP_TUNER;
991
992 return 0;
993 }
994
995 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
996 struct v4l2_fmtdesc *fmtd)
997 {
998 if (fmtd->index != 0)
999 return -EINVAL;
1000
1001 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1002 strcpy(fmtd->description, "Packed YUY2");
1003 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1004 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1005
1006 return 0;
1007 }
1008
1009 /* Sliced VBI ioctls */
1010 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1011 struct v4l2_format *f)
1012 {
1013 struct em28xx_fh *fh = priv;
1014 struct em28xx *dev = fh->dev;
1015 int rc;
1016
1017 rc = check_dev(dev);
1018 if (rc < 0)
1019 return rc;
1020
1021 mutex_lock(&dev->lock);
1022
1023 f->fmt.sliced.service_set = 0;
1024
1025 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1026
1027 if (f->fmt.sliced.service_set == 0)
1028 rc = -EINVAL;
1029
1030 mutex_unlock(&dev->lock);
1031 return rc;
1032 }
1033
1034 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1035 struct v4l2_format *f)
1036 {
1037 struct em28xx_fh *fh = priv;
1038 struct em28xx *dev = fh->dev;
1039 int rc;
1040
1041 rc = check_dev(dev);
1042 if (rc < 0)
1043 return rc;
1044
1045 mutex_lock(&dev->lock);
1046 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1047 mutex_unlock(&dev->lock);
1048
1049 if (f->fmt.sliced.service_set == 0)
1050 return -EINVAL;
1051
1052 return 0;
1053 }
1054
1055
1056 static int vidioc_reqbufs(struct file *file, void *priv,
1057 struct v4l2_requestbuffers *rb)
1058 {
1059 struct em28xx_fh *fh = priv;
1060 struct em28xx *dev = fh->dev;
1061 u32 i;
1062 int rc;
1063
1064 rc = check_dev(dev);
1065 if (rc < 0)
1066 return rc;
1067
1068 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1069 rb->memory != V4L2_MEMORY_MMAP)
1070 return -EINVAL;
1071
1072 if (dev->io == IO_READ) {
1073 em28xx_videodbg("method is set to read;"
1074 " close and open the device again to"
1075 " choose the mmap I/O method\n");
1076 return -EINVAL;
1077 }
1078
1079 for (i = 0; i < dev->num_frames; i++)
1080 if (dev->frame[i].vma_use_count) {
1081 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1082 "previous buffers are still mapped\n");
1083 return -EINVAL;
1084 }
1085
1086 mutex_lock(&dev->lock);
1087
1088 if (dev->stream == STREAM_ON) {
1089 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1090 rc = em28xx_stream_interrupt(dev);
1091 if (rc < 0) {
1092 mutex_unlock(&dev->lock);
1093 return rc;
1094 }
1095 }
1096
1097 em28xx_empty_framequeues(dev);
1098
1099 em28xx_release_buffers(dev);
1100 if (rb->count)
1101 rb->count = em28xx_request_buffers(dev, rb->count);
1102
1103 dev->frame_current = NULL;
1104 dev->io = rb->count ? IO_MMAP : IO_NONE;
1105
1106 mutex_unlock(&dev->lock);
1107 return 0;
1108 }
1109
1110 static int vidioc_querybuf(struct file *file, void *priv,
1111 struct v4l2_buffer *b)
1112 {
1113 struct em28xx_fh *fh = priv;
1114 struct em28xx *dev = fh->dev;
1115 int rc;
1116
1117 rc = check_dev(dev);
1118 if (rc < 0)
1119 return rc;
1120
1121 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1122 b->index >= dev->num_frames || dev->io != IO_MMAP)
1123 return -EINVAL;
1124
1125 mutex_lock(&dev->lock);
1126
1127 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1128
1129 if (dev->frame[b->index].vma_use_count)
1130 b->flags |= V4L2_BUF_FLAG_MAPPED;
1131
1132 if (dev->frame[b->index].state == F_DONE)
1133 b->flags |= V4L2_BUF_FLAG_DONE;
1134 else if (dev->frame[b->index].state != F_UNUSED)
1135 b->flags |= V4L2_BUF_FLAG_QUEUED;
1136
1137 mutex_unlock(&dev->lock);
1138 return 0;
1139 }
1140
1141 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1142 {
1143 struct em28xx_fh *fh = priv;
1144 struct em28xx *dev = fh->dev;
1145 unsigned long lock_flags;
1146 int rc;
1147
1148 rc = check_dev(dev);
1149 if (rc < 0)
1150 return rc;
1151
1152 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP ||
1153 b->index >= dev->num_frames)
1154 return -EINVAL;
1155
1156 if (dev->frame[b->index].state != F_UNUSED)
1157 return -EAGAIN;
1158
1159 dev->frame[b->index].state = F_QUEUED;
1160
1161 /* add frame to fifo */
1162 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1163 list_add_tail(&dev->frame[b->index].frame, &dev->inqueue);
1164 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1165
1166 return 0;
1167 }
1168
1169 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1170 {
1171 struct em28xx_fh *fh = priv;
1172 struct em28xx *dev = fh->dev;
1173 int rc;
1174 struct em28xx_frame_t *f;
1175 unsigned long lock_flags;
1176
1177 rc = check_dev(dev);
1178 if (rc < 0)
1179 return rc;
1180
1181 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
1182 return -EINVAL;
1183
1184 if (list_empty(&dev->outqueue)) {
1185 if (dev->stream == STREAM_OFF)
1186 return -EINVAL;
1187
1188 if (file->f_flags & O_NONBLOCK)
1189 return -EAGAIN;
1190
1191 rc = wait_event_interruptible(dev->wait_frame,
1192 (!list_empty(&dev->outqueue)) ||
1193 (dev->state & DEV_DISCONNECTED));
1194 if (rc)
1195 return rc;
1196
1197 if (dev->state & DEV_DISCONNECTED)
1198 return -ENODEV;
1199 }
1200
1201 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1202 f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame);
1203 list_del(dev->outqueue.next);
1204 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1205
1206 f->state = F_UNUSED;
1207 memcpy(b, &f->buf, sizeof(*b));
1208
1209 if (f->vma_use_count)
1210 b->flags |= V4L2_BUF_FLAG_MAPPED;
1211
1212 return 0;
1213 }
1214
1215 /* ----------------------------------------------------------- */
1216 /* RADIO ESPECIFIC IOCTLS */
1217 /* ----------------------------------------------------------- */
1218
1219 static int radio_querycap(struct file *file, void *priv,
1220 struct v4l2_capability *cap)
1221 {
1222 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1223
1224 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1225 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1226 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1227
1228 cap->version = EM28XX_VERSION_CODE;
1229 cap->capabilities = V4L2_CAP_TUNER;
1230 return 0;
1231 }
1232
1233 static int radio_g_tuner(struct file *file, void *priv,
1234 struct v4l2_tuner *t)
1235 {
1236 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1237
1238 if (unlikely(t->index > 0))
1239 return -EINVAL;
1240
1241 strcpy(t->name, "Radio");
1242 t->type = V4L2_TUNER_RADIO;
1243
1244 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1245 return 0;
1246 }
1247
1248 static int radio_enum_input(struct file *file, void *priv,
1249 struct v4l2_input *i)
1250 {
1251 if (i->index != 0)
1252 return -EINVAL;
1253 strcpy(i->name, "Radio");
1254 i->type = V4L2_INPUT_TYPE_TUNER;
1255
1256 return 0;
1257 }
1258
1259 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1260 {
1261 if (unlikely(a->index))
1262 return -EINVAL;
1263
1264 strcpy(a->name, "Radio");
1265 return 0;
1266 }
1267
1268 static int radio_s_tuner(struct file *file, void *priv,
1269 struct v4l2_tuner *t)
1270 {
1271 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1272
1273 if (0 != t->index)
1274 return -EINVAL;
1275
1276 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1277
1278 return 0;
1279 }
1280
1281 static int radio_s_audio(struct file *file, void *fh,
1282 struct v4l2_audio *a)
1283 {
1284 return 0;
1285 }
1286
1287 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1288 {
1289 return 0;
1290 }
1291
1292 static int radio_queryctrl(struct file *file, void *priv,
1293 struct v4l2_queryctrl *qc)
1294 {
1295 int i;
1296
1297 if (qc->id < V4L2_CID_BASE ||
1298 qc->id >= V4L2_CID_LASTP1)
1299 return -EINVAL;
1300
1301 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1302 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1303 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1304 return 0;
1305 }
1306 }
1307
1308 return -EINVAL;
1309 }
1310
1311 /*
1312 * em28xx_v4l2_open()
1313 * inits the device and starts isoc transfer
1314 */
1315 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1316 {
1317 int minor = iminor(inode);
1318 int errCode = 0, radio = 0;
1319 struct em28xx *h,*dev = NULL;
1320 struct em28xx_fh *fh;
1321
1322 list_for_each_entry(h, &em28xx_devlist, devlist) {
1323 if (h->vdev->minor == minor) {
1324 dev = h;
1325 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1326 }
1327 if (h->vbi_dev->minor == minor) {
1328 dev = h;
1329 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1330 }
1331 if (h->radio_dev &&
1332 h->radio_dev->minor == minor) {
1333 radio = 1;
1334 dev = h;
1335 }
1336 }
1337 if (NULL == dev)
1338 return -ENODEV;
1339
1340 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1341 minor,v4l2_type_names[dev->type],dev->users);
1342
1343 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1344
1345 if (!fh) {
1346 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1347 return -ENOMEM;
1348 }
1349 mutex_lock(&dev->lock);
1350 fh->dev = dev;
1351 fh->radio = radio;
1352 filp->private_data = fh;
1353
1354 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1355 em28xx_set_alternate(dev);
1356
1357 dev->width = norm_maxw(dev);
1358 dev->height = norm_maxh(dev);
1359 dev->frame_size = dev->width * dev->height * 2;
1360 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1361 dev->bytesperline = dev->width * 2;
1362 dev->hscale = 0;
1363 dev->vscale = 0;
1364
1365 em28xx_capture_start(dev, 1);
1366 em28xx_resolution_set(dev);
1367
1368
1369 /* start the transfer */
1370 errCode = em28xx_init_isoc(dev);
1371 if (errCode)
1372 goto err;
1373
1374 em28xx_empty_framequeues(dev);
1375 }
1376 if (fh->radio) {
1377 em28xx_videodbg("video_open: setting radio device\n");
1378 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1379 }
1380
1381 dev->users++;
1382
1383 err:
1384 mutex_unlock(&dev->lock);
1385 return errCode;
1386 }
1387
1388 /*
1389 * em28xx_realease_resources()
1390 * unregisters the v4l2,i2c and usb devices
1391 * called when the device gets disconected or at module unload
1392 */
1393 static void em28xx_release_resources(struct em28xx *dev)
1394 {
1395
1396 /*FIXME: I2C IR should be disconnected */
1397
1398 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1399 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1400 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1401 list_del(&dev->devlist);
1402 if (dev->radio_dev) {
1403 if (-1 != dev->radio_dev->minor)
1404 video_unregister_device(dev->radio_dev);
1405 else
1406 video_device_release(dev->radio_dev);
1407 dev->radio_dev = NULL;
1408 }
1409 if (dev->vbi_dev) {
1410 if (-1 != dev->vbi_dev->minor)
1411 video_unregister_device(dev->vbi_dev);
1412 else
1413 video_device_release(dev->vbi_dev);
1414 dev->vbi_dev = NULL;
1415 }
1416 if (dev->vdev) {
1417 if (-1 != dev->vdev->minor)
1418 video_unregister_device(dev->vdev);
1419 else
1420 video_device_release(dev->vdev);
1421 dev->vdev = NULL;
1422 }
1423 em28xx_i2c_unregister(dev);
1424 usb_put_dev(dev->udev);
1425
1426 /* Mark device as unused */
1427 em28xx_devused&=~(1<<dev->devno);
1428 }
1429
1430 /*
1431 * em28xx_v4l2_close()
1432 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1433 */
1434 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1435 {
1436 struct em28xx_fh *fh = filp->private_data;
1437 struct em28xx *dev = fh->dev;
1438 int errCode;
1439
1440 em28xx_videodbg("users=%d\n", dev->users);
1441
1442
1443 if (res_check(fh))
1444 res_free(fh);
1445
1446 mutex_lock(&dev->lock);
1447
1448 if (dev->users == 1) {
1449 em28xx_uninit_isoc(dev);
1450 em28xx_release_buffers(dev);
1451 dev->io = IO_NONE;
1452
1453 /* the device is already disconnect,
1454 free the remaining resources */
1455 if (dev->state & DEV_DISCONNECTED) {
1456 em28xx_release_resources(dev);
1457 mutex_unlock(&dev->lock);
1458 kfree(dev);
1459 return 0;
1460 }
1461
1462 /* set alternate 0 */
1463 dev->alt = 0;
1464 em28xx_videodbg("setting alternate 0\n");
1465 errCode = usb_set_interface(dev->udev, 0, 0);
1466 if (errCode < 0) {
1467 em28xx_errdev("cannot change alternate number to "
1468 "0 (error=%i)\n", errCode);
1469 }
1470 }
1471 kfree(fh);
1472 dev->users--;
1473 wake_up_interruptible_nr(&dev->open, 1);
1474 mutex_unlock(&dev->lock);
1475 return 0;
1476 }
1477
1478 /*
1479 * em28xx_v4l2_read()
1480 * will allocate buffers when called for the first time
1481 */
1482 static ssize_t
1483 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1484 loff_t * f_pos)
1485 {
1486 struct em28xx_frame_t *f, *i;
1487 unsigned long lock_flags;
1488 int ret = 0;
1489 struct em28xx_fh *fh = filp->private_data;
1490 struct em28xx *dev = fh->dev;
1491
1492 /* FIXME: read() is not prepared to allow changing the video
1493 resolution while streaming. Seems a bug at em28xx_set_fmt
1494 */
1495
1496 if (unlikely(res_get(fh) < 0))
1497 return -EBUSY;
1498
1499 mutex_lock(&dev->lock);
1500
1501 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1502 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1503
1504 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1505 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1506 em28xx_videodbg("not supported yet! ...\n");
1507 if (copy_to_user(buf, "", 1)) {
1508 mutex_unlock(&dev->lock);
1509 return -EFAULT;
1510 }
1511 mutex_unlock(&dev->lock);
1512 return (1);
1513 }
1514 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
1515 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1516 em28xx_videodbg("not supported yet! ...\n");
1517 if (copy_to_user(buf, "", 1)) {
1518 mutex_unlock(&dev->lock);
1519 return -EFAULT;
1520 }
1521 mutex_unlock(&dev->lock);
1522 return (1);
1523 }
1524
1525 if (dev->state & DEV_DISCONNECTED) {
1526 em28xx_videodbg("device not present\n");
1527 mutex_unlock(&dev->lock);
1528 return -ENODEV;
1529 }
1530
1531 if (dev->state & DEV_MISCONFIGURED) {
1532 em28xx_videodbg("device misconfigured; close and open it again\n");
1533 mutex_unlock(&dev->lock);
1534 return -EIO;
1535 }
1536
1537 if (dev->io == IO_MMAP) {
1538 em28xx_videodbg ("IO method is set to mmap; close and open"
1539 " the device again to choose the read method\n");
1540 mutex_unlock(&dev->lock);
1541 return -EINVAL;
1542 }
1543
1544 if (dev->io == IO_NONE) {
1545 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
1546 em28xx_errdev("read failed, not enough memory\n");
1547 mutex_unlock(&dev->lock);
1548 return -ENOMEM;
1549 }
1550 dev->io = IO_READ;
1551 dev->stream = STREAM_ON;
1552 em28xx_queue_unusedframes(dev);
1553 }
1554
1555 if (!count) {
1556 mutex_unlock(&dev->lock);
1557 return 0;
1558 }
1559
1560 if (list_empty(&dev->outqueue)) {
1561 if (filp->f_flags & O_NONBLOCK) {
1562 mutex_unlock(&dev->lock);
1563 return -EAGAIN;
1564 }
1565 ret = wait_event_interruptible
1566 (dev->wait_frame,
1567 (!list_empty(&dev->outqueue)) ||
1568 (dev->state & DEV_DISCONNECTED));
1569 if (ret) {
1570 mutex_unlock(&dev->lock);
1571 return ret;
1572 }
1573 if (dev->state & DEV_DISCONNECTED) {
1574 mutex_unlock(&dev->lock);
1575 return -ENODEV;
1576 }
1577 dev->video_bytesread = 0;
1578 }
1579
1580 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
1581
1582 em28xx_queue_unusedframes(dev);
1583
1584 if (count > f->buf.length)
1585 count = f->buf.length;
1586
1587 if ((dev->video_bytesread + count) > dev->frame_size)
1588 count = dev->frame_size - dev->video_bytesread;
1589
1590 if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) {
1591 em28xx_err("Error while copying to user\n");
1592 return -EFAULT;
1593 }
1594 dev->video_bytesread += count;
1595
1596 if (dev->video_bytesread == dev->frame_size) {
1597 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1598 list_for_each_entry(i, &dev->outqueue, frame)
1599 i->state = F_UNUSED;
1600 INIT_LIST_HEAD(&dev->outqueue);
1601 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1602
1603 em28xx_queue_unusedframes(dev);
1604 dev->video_bytesread = 0;
1605 }
1606
1607 *f_pos += count;
1608
1609 mutex_unlock(&dev->lock);
1610
1611 return count;
1612 }
1613
1614 /*
1615 * em28xx_v4l2_poll()
1616 * will allocate buffers when called for the first time
1617 */
1618 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1619 {
1620 unsigned int mask = 0;
1621 struct em28xx_fh *fh = filp->private_data;
1622 struct em28xx *dev = fh->dev;
1623
1624 if (unlikely(res_get(fh) < 0))
1625 return POLLERR;
1626
1627 mutex_lock(&dev->lock);
1628
1629 if (dev->state & DEV_DISCONNECTED) {
1630 em28xx_videodbg("device not present\n");
1631 } else if (dev->state & DEV_MISCONFIGURED) {
1632 em28xx_videodbg("device is misconfigured; close and open it again\n");
1633 } else {
1634 if (dev->io == IO_NONE) {
1635 if (!em28xx_request_buffers
1636 (dev, EM28XX_NUM_READ_FRAMES)) {
1637 em28xx_warn
1638 ("poll() failed, not enough memory\n");
1639 } else {
1640 dev->io = IO_READ;
1641 dev->stream = STREAM_ON;
1642 }
1643 }
1644
1645 if (dev->io == IO_READ) {
1646 em28xx_queue_unusedframes(dev);
1647 poll_wait(filp, &dev->wait_frame, wait);
1648
1649 if (!list_empty(&dev->outqueue))
1650 mask |= POLLIN | POLLRDNORM;
1651
1652 mutex_unlock(&dev->lock);
1653
1654 return mask;
1655 }
1656 }
1657
1658 mutex_unlock(&dev->lock);
1659 return POLLERR;
1660 }
1661
1662 /*
1663 * em28xx_v4l2_mmap()
1664 */
1665 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1666 {
1667 struct em28xx_fh *fh = filp->private_data;
1668 struct em28xx *dev = fh->dev;
1669 unsigned long size = vma->vm_end - vma->vm_start;
1670 unsigned long start = vma->vm_start;
1671 void *pos;
1672 u32 i;
1673
1674 if (unlikely(res_get(fh) < 0))
1675 return -EBUSY;
1676
1677 mutex_lock(&dev->lock);
1678
1679 if (dev->state & DEV_DISCONNECTED) {
1680 em28xx_videodbg("mmap: device not present\n");
1681 mutex_unlock(&dev->lock);
1682 return -ENODEV;
1683 }
1684
1685 if (dev->state & DEV_MISCONFIGURED) {
1686 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1687 "open it again\n");
1688 mutex_unlock(&dev->lock);
1689 return -EIO;
1690 }
1691
1692 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) {
1693 mutex_unlock(&dev->lock);
1694 return -EINVAL;
1695 }
1696
1697 if (size > PAGE_ALIGN(dev->frame[0].buf.length))
1698 size = PAGE_ALIGN(dev->frame[0].buf.length);
1699
1700 for (i = 0; i < dev->num_frames; i++) {
1701 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
1702 break;
1703 }
1704 if (i == dev->num_frames) {
1705 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1706 mutex_unlock(&dev->lock);
1707 return -EINVAL;
1708 }
1709
1710 /* VM_IO is eventually going to replace PageReserved altogether */
1711 vma->vm_flags |= VM_IO;
1712 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
1713
1714 pos = dev->frame[i].bufmem;
1715 while (size > 0) { /* size is page-aligned */
1716 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1717 em28xx_videodbg("mmap: vm_insert_page failed\n");
1718 mutex_unlock(&dev->lock);
1719 return -EAGAIN;
1720 }
1721 start += PAGE_SIZE;
1722 pos += PAGE_SIZE;
1723 size -= PAGE_SIZE;
1724 }
1725
1726 vma->vm_ops = &em28xx_vm_ops;
1727 vma->vm_private_data = &dev->frame[i];
1728
1729 em28xx_vm_open(vma);
1730 mutex_unlock(&dev->lock);
1731 return 0;
1732 }
1733
1734 static const struct file_operations em28xx_v4l_fops = {
1735 .owner = THIS_MODULE,
1736 .open = em28xx_v4l2_open,
1737 .release = em28xx_v4l2_close,
1738 .read = em28xx_v4l2_read,
1739 .poll = em28xx_v4l2_poll,
1740 .mmap = em28xx_v4l2_mmap,
1741 .ioctl = video_ioctl2,
1742 .llseek = no_llseek,
1743 .compat_ioctl = v4l_compat_ioctl32,
1744 };
1745
1746 static const struct file_operations radio_fops = {
1747 .owner = THIS_MODULE,
1748 .open = em28xx_v4l2_open,
1749 .release = em28xx_v4l2_close,
1750 .ioctl = video_ioctl2,
1751 .compat_ioctl = v4l_compat_ioctl32,
1752 .llseek = no_llseek,
1753 };
1754
1755 static const struct video_device em28xx_video_template = {
1756 .fops = &em28xx_v4l_fops,
1757 .release = video_device_release,
1758
1759 .minor = -1,
1760 .vidioc_querycap = vidioc_querycap,
1761 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1762 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1763 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1764 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1765 .vidioc_g_audio = vidioc_g_audio,
1766 .vidioc_s_audio = vidioc_s_audio,
1767 .vidioc_cropcap = vidioc_cropcap,
1768
1769 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1770 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1771 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1772
1773 .vidioc_reqbufs = vidioc_reqbufs,
1774 .vidioc_querybuf = vidioc_querybuf,
1775 .vidioc_qbuf = vidioc_qbuf,
1776 .vidioc_dqbuf = vidioc_dqbuf,
1777 .vidioc_s_std = vidioc_s_std,
1778 .vidioc_enum_input = vidioc_enum_input,
1779 .vidioc_g_input = vidioc_g_input,
1780 .vidioc_s_input = vidioc_s_input,
1781 .vidioc_queryctrl = vidioc_queryctrl,
1782 .vidioc_g_ctrl = vidioc_g_ctrl,
1783 .vidioc_s_ctrl = vidioc_s_ctrl,
1784 .vidioc_streamon = vidioc_streamon,
1785 .vidioc_streamoff = vidioc_streamoff,
1786 .vidioc_g_tuner = vidioc_g_tuner,
1787 .vidioc_s_tuner = vidioc_s_tuner,
1788 .vidioc_g_frequency = vidioc_g_frequency,
1789 .vidioc_s_frequency = vidioc_s_frequency,
1790 #ifdef CONFIG_VIDEO_ADV_DEBUG
1791 .vidioc_g_register = vidioc_g_register,
1792 .vidioc_s_register = vidioc_s_register,
1793 #endif
1794
1795 .tvnorms = V4L2_STD_ALL,
1796 .current_norm = V4L2_STD_PAL,
1797 };
1798
1799 static struct video_device em28xx_radio_template = {
1800 .name = "em28xx-radio",
1801 .type = VID_TYPE_TUNER,
1802 .fops = &radio_fops,
1803 .minor = -1,
1804 .vidioc_querycap = radio_querycap,
1805 .vidioc_g_tuner = radio_g_tuner,
1806 .vidioc_enum_input = radio_enum_input,
1807 .vidioc_g_audio = radio_g_audio,
1808 .vidioc_s_tuner = radio_s_tuner,
1809 .vidioc_s_audio = radio_s_audio,
1810 .vidioc_s_input = radio_s_input,
1811 .vidioc_queryctrl = radio_queryctrl,
1812 .vidioc_g_ctrl = vidioc_g_ctrl,
1813 .vidioc_s_ctrl = vidioc_s_ctrl,
1814 .vidioc_g_frequency = vidioc_g_frequency,
1815 .vidioc_s_frequency = vidioc_s_frequency,
1816 #ifdef CONFIG_VIDEO_ADV_DEBUG
1817 .vidioc_g_register = vidioc_g_register,
1818 .vidioc_s_register = vidioc_s_register,
1819 #endif
1820 };
1821
1822 /******************************** usb interface *****************************************/
1823
1824
1825 static LIST_HEAD(em28xx_extension_devlist);
1826 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1827
1828 int em28xx_register_extension(struct em28xx_ops *ops)
1829 {
1830 struct em28xx *h, *dev = NULL;
1831
1832 list_for_each_entry(h, &em28xx_devlist, devlist)
1833 dev = h;
1834
1835 mutex_lock(&em28xx_extension_devlist_lock);
1836 list_add_tail(&ops->next, &em28xx_extension_devlist);
1837 if (dev)
1838 ops->init(dev);
1839
1840 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1841 mutex_unlock(&em28xx_extension_devlist_lock);
1842
1843 return 0;
1844 }
1845 EXPORT_SYMBOL(em28xx_register_extension);
1846
1847 void em28xx_unregister_extension(struct em28xx_ops *ops)
1848 {
1849 struct em28xx *h, *dev = NULL;
1850
1851 list_for_each_entry(h, &em28xx_devlist, devlist)
1852 dev = h;
1853
1854 if (dev)
1855 ops->fini(dev);
1856
1857 mutex_lock(&em28xx_extension_devlist_lock);
1858 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1859 list_del(&ops->next);
1860 mutex_unlock(&em28xx_extension_devlist_lock);
1861 }
1862 EXPORT_SYMBOL(em28xx_unregister_extension);
1863
1864 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1865 const struct video_device *template,
1866 const int type,
1867 const char *type_name)
1868 {
1869 struct video_device *vfd;
1870
1871 vfd = video_device_alloc();
1872 if (NULL == vfd)
1873 return NULL;
1874 *vfd = *template;
1875 vfd->minor = -1;
1876 vfd->dev = &dev->udev->dev;
1877 vfd->release = video_device_release;
1878 vfd->type = type;
1879
1880 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1881 dev->name, type_name);
1882
1883 return vfd;
1884 }
1885
1886
1887 /*
1888 * em28xx_init_dev()
1889 * allocates and inits the device structs, registers i2c bus and v4l device
1890 */
1891 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1892 int minor)
1893 {
1894 struct em28xx_ops *ops = NULL;
1895 struct em28xx *dev = *devhandle;
1896 int retval = -ENOMEM;
1897 int errCode;
1898 unsigned int maxh, maxw;
1899
1900 dev->udev = udev;
1901 mutex_init(&dev->lock);
1902 spin_lock_init(&dev->queue_lock);
1903 init_waitqueue_head(&dev->open);
1904 init_waitqueue_head(&dev->wait_frame);
1905 init_waitqueue_head(&dev->wait_stream);
1906
1907 dev->em28xx_write_regs = em28xx_write_regs;
1908 dev->em28xx_read_reg = em28xx_read_reg;
1909 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1910 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1911 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1912 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1913
1914 errCode = em28xx_read_reg(dev, CHIPID_REG);
1915 if (errCode >= 0)
1916 em28xx_info("em28xx chip ID = %d\n", errCode);
1917
1918 em28xx_pre_card_setup(dev);
1919
1920 errCode = em28xx_config(dev);
1921 if (errCode) {
1922 em28xx_errdev("error configuring device\n");
1923 em28xx_devused &= ~(1<<dev->devno);
1924 kfree(dev);
1925 return -ENOMEM;
1926 }
1927
1928 /* register i2c bus */
1929 em28xx_i2c_register(dev);
1930
1931 /* Do board specific init and eeprom reading */
1932 em28xx_card_setup(dev);
1933
1934 /* Configure audio */
1935 em28xx_audio_analog_set(dev);
1936
1937 /* configure the device */
1938 em28xx_config_i2c(dev);
1939
1940 /* set default norm */
1941 dev->norm = em28xx_video_template.current_norm;
1942
1943 maxw = norm_maxw(dev);
1944 maxh = norm_maxh(dev);
1945
1946 /* set default image size */
1947 dev->width = maxw;
1948 dev->height = maxh;
1949 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1950 dev->field_size = dev->width * dev->height;
1951 dev->frame_size =
1952 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1953 dev->bytesperline = dev->width * 2;
1954 dev->hscale = 0;
1955 dev->vscale = 0;
1956 dev->ctl_input = 2;
1957
1958 errCode = em28xx_config(dev);
1959
1960 list_add_tail(&dev->devlist, &em28xx_devlist);
1961
1962 /* allocate and fill video video_device struct */
1963 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1964 VID_TYPE_CAPTURE, "video");
1965 if (NULL == dev->vdev) {
1966 em28xx_errdev("cannot allocate video_device.\n");
1967 goto fail_unreg;
1968 }
1969 if (dev->tuner_type != TUNER_ABSENT)
1970 dev->vdev->type |= VID_TYPE_TUNER;
1971
1972 /* register v4l2 video video_device */
1973 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1974 video_nr[dev->devno]);
1975 if (retval) {
1976 em28xx_errdev("unable to register video device (error=%i).\n",
1977 retval);
1978 goto fail_unreg;
1979 }
1980
1981 /* Allocate and fill vbi video_device struct */
1982 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1983 VFL_TYPE_VBI, "vbi");
1984 /* register v4l2 vbi video_device */
1985 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1986 vbi_nr[dev->devno]) < 0) {
1987 em28xx_errdev("unable to register vbi device\n");
1988 retval = -ENODEV;
1989 goto fail_unreg;
1990 }
1991
1992 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1993 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
1994 VFL_TYPE_RADIO, "radio");
1995 if (NULL == dev->radio_dev) {
1996 em28xx_errdev("cannot allocate video_device.\n");
1997 goto fail_unreg;
1998 }
1999 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2000 radio_nr[dev->devno]);
2001 if (retval < 0) {
2002 em28xx_errdev("can't register radio device\n");
2003 goto fail_unreg;
2004 }
2005 em28xx_info("Registered radio device as /dev/radio%d\n",
2006 dev->radio_dev->minor & 0x1f);
2007 }
2008
2009
2010 if (dev->has_msp34xx) {
2011 /* Send a reset to other chips via gpio */
2012 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2013 msleep(3);
2014 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2015 msleep(3);
2016 }
2017
2018 video_mux(dev, 0);
2019
2020 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2021 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2022 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2023
2024 mutex_lock(&em28xx_extension_devlist_lock);
2025 if (!list_empty(&em28xx_extension_devlist)) {
2026 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2027 if (ops->id)
2028 ops->init(dev);
2029 }
2030 }
2031 mutex_unlock(&em28xx_extension_devlist_lock);
2032
2033 return 0;
2034
2035 fail_unreg:
2036 em28xx_release_resources(dev);
2037 mutex_unlock(&dev->lock);
2038 kfree(dev);
2039 return retval;
2040 }
2041
2042 #if defined(CONFIG_MODULES) && defined(MODULE)
2043 static void request_module_async(struct work_struct *work)
2044 {
2045 struct em28xx *dev = container_of(work,
2046 struct em28xx, request_module_wk);
2047
2048 if (dev->has_audio_class)
2049 request_module("snd-usb-audio");
2050 else
2051 request_module("em28xx-alsa");
2052 }
2053
2054 static void request_modules(struct em28xx *dev)
2055 {
2056 INIT_WORK(&dev->request_module_wk, request_module_async);
2057 schedule_work(&dev->request_module_wk);
2058 }
2059 #else
2060 #define request_modules(dev)
2061 #endif /* CONFIG_MODULES */
2062
2063 /*
2064 * em28xx_usb_probe()
2065 * checks for supported devices
2066 */
2067 static int em28xx_usb_probe(struct usb_interface *interface,
2068 const struct usb_device_id *id)
2069 {
2070 const struct usb_endpoint_descriptor *endpoint;
2071 struct usb_device *udev;
2072 struct usb_interface *uif;
2073 struct em28xx *dev = NULL;
2074 int retval = -ENODEV;
2075 int i, nr, ifnum;
2076
2077 udev = usb_get_dev(interface_to_usbdev(interface));
2078 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2079
2080 /* Check to see next free device and mark as used */
2081 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2082 em28xx_devused|=1<<nr;
2083
2084 /* Don't register audio interfaces */
2085 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2086 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2087 udev->descriptor.idVendor,udev->descriptor.idProduct,
2088 ifnum,
2089 interface->altsetting[0].desc.bInterfaceClass);
2090
2091 em28xx_devused&=~(1<<nr);
2092 return -ENODEV;
2093 }
2094
2095 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2096 udev->descriptor.idVendor,udev->descriptor.idProduct,
2097 ifnum,
2098 interface->altsetting[0].desc.bInterfaceClass);
2099
2100 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2101
2102 /* check if the device has the iso in endpoint at the correct place */
2103 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2104 USB_ENDPOINT_XFER_ISOC) {
2105 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2106 em28xx_devused&=~(1<<nr);
2107 return -ENODEV;
2108 }
2109 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2110 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2111 em28xx_devused&=~(1<<nr);
2112 return -ENODEV;
2113 }
2114
2115 if (nr >= EM28XX_MAXBOARDS) {
2116 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2117 em28xx_devused&=~(1<<nr);
2118 return -ENOMEM;
2119 }
2120
2121 /* allocate memory for our device state and initialize it */
2122 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2123 if (dev == NULL) {
2124 em28xx_err(DRIVER_NAME ": out of memory!\n");
2125 em28xx_devused&=~(1<<nr);
2126 return -ENOMEM;
2127 }
2128
2129 snprintf(dev->name, 29, "em28xx #%d", nr);
2130 dev->devno = nr;
2131 dev->model = id->driver_info;
2132
2133 /* Checks if audio is provided by some interface */
2134 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2135 uif = udev->config->interface[i];
2136 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2137 dev->has_audio_class = 1;
2138 break;
2139 }
2140 }
2141
2142 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2143 dev->has_audio_class ? "Has" : "Doesn't have");
2144
2145 /* compute alternate max packet sizes */
2146 uif = udev->actconfig->interface[0];
2147
2148 dev->num_alt=uif->num_altsetting;
2149 em28xx_info("Alternate settings: %i\n",dev->num_alt);
2150 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2151 dev->alt_max_pkt_size = kmalloc(32*
2152 dev->num_alt,GFP_KERNEL);
2153 if (dev->alt_max_pkt_size == NULL) {
2154 em28xx_errdev("out of memory!\n");
2155 em28xx_devused&=~(1<<nr);
2156 kfree(dev);
2157 return -ENOMEM;
2158 }
2159
2160 for (i = 0; i < dev->num_alt ; i++) {
2161 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2162 wMaxPacketSize);
2163 dev->alt_max_pkt_size[i] =
2164 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2165 em28xx_info("Alternate setting %i, max size= %i\n",i,
2166 dev->alt_max_pkt_size[i]);
2167 }
2168
2169 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2170 dev->model = card[nr];
2171
2172 /* allocate device struct */
2173 retval = em28xx_init_dev(&dev, udev, nr);
2174 if (retval)
2175 return retval;
2176
2177 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2178
2179 /* save our data pointer in this interface device */
2180 usb_set_intfdata(interface, dev);
2181
2182 request_modules(dev);
2183
2184 return 0;
2185 }
2186
2187 /*
2188 * em28xx_usb_disconnect()
2189 * called when the device gets diconencted
2190 * video device will be unregistered on v4l2_close in case it is still open
2191 */
2192 static void em28xx_usb_disconnect(struct usb_interface *interface)
2193 {
2194 struct em28xx *dev;
2195 struct em28xx_ops *ops = NULL;
2196
2197 dev = usb_get_intfdata(interface);
2198 usb_set_intfdata(interface, NULL);
2199
2200 if (!dev)
2201 return;
2202
2203 em28xx_info("disconnecting %s\n", dev->vdev->name);
2204
2205 /* wait until all current v4l2 io is finished then deallocate resources */
2206 mutex_lock(&dev->lock);
2207
2208 wake_up_interruptible_all(&dev->open);
2209
2210 if (dev->users) {
2211 em28xx_warn
2212 ("device /dev/video%d is open! Deregistration and memory "
2213 "deallocation are deferred on close.\n",
2214 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2215
2216 dev->state |= DEV_MISCONFIGURED;
2217 em28xx_uninit_isoc(dev);
2218 dev->state |= DEV_DISCONNECTED;
2219 wake_up_interruptible(&dev->wait_frame);
2220 wake_up_interruptible(&dev->wait_stream);
2221 } else {
2222 dev->state |= DEV_DISCONNECTED;
2223 em28xx_release_resources(dev);
2224 }
2225 mutex_unlock(&dev->lock);
2226
2227 mutex_lock(&em28xx_extension_devlist_lock);
2228 if (!list_empty(&em28xx_extension_devlist)) {
2229 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2230 ops->fini(dev);
2231 }
2232 }
2233 mutex_unlock(&em28xx_extension_devlist_lock);
2234
2235 if (!dev->users) {
2236 kfree(dev->alt_max_pkt_size);
2237 kfree(dev);
2238 }
2239 }
2240
2241 static struct usb_driver em28xx_usb_driver = {
2242 .name = "em28xx",
2243 .probe = em28xx_usb_probe,
2244 .disconnect = em28xx_usb_disconnect,
2245 .id_table = em28xx_id_table,
2246 };
2247
2248 static int __init em28xx_module_init(void)
2249 {
2250 int result;
2251
2252 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2253 (EM28XX_VERSION_CODE >> 16) & 0xff,
2254 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2255 #ifdef SNAPSHOT
2256 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2257 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2258 #endif
2259
2260 /* register this driver with the USB subsystem */
2261 result = usb_register(&em28xx_usb_driver);
2262 if (result)
2263 em28xx_err(DRIVER_NAME
2264 " usb_register failed. Error number %d.\n", result);
2265
2266 return result;
2267 }
2268
2269 static void __exit em28xx_module_exit(void)
2270 {
2271 /* deregister this driver with the USB subsystem */
2272 usb_deregister(&em28xx_usb_driver);
2273 }
2274
2275 module_init(em28xx_module_init);
2276 module_exit(em28xx_module_exit);
Linux kernel - Deliverables
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