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[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_set_audio_source(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
841 return 2;
842 default:
843 return 1;
844 }
845 }
846
847 static int vidioc_g_register(struct file *file, void *priv,
848 struct v4l2_register *reg)
849 {
850 struct em28xx_fh *fh = priv;
851 struct em28xx *dev = fh->dev;
852 int ret;
853
854 if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
855 return -EINVAL;
856
857 if (em28xx_reg_len(reg->reg) == 1) {
858 ret = em28xx_read_reg(dev, reg->reg);
859 if (ret < 0)
860 return ret;
861
862 reg->val = ret;
863 } else {
864 u64 val = 0;
865 ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
866 reg->reg, (char *)&val, 2);
867 if (ret < 0)
868 return ret;
869
870 reg->val = cpu_to_le64((__u64)val);
871 }
872
873 return 0;
874 }
875
876 static int vidioc_s_register(struct file *file, void *priv,
877 struct v4l2_register *reg)
878 {
879 struct em28xx_fh *fh = priv;
880 struct em28xx *dev = fh->dev;
881 u64 buf;
882
883 buf = le64_to_cpu((__u64)reg->val);
884
885 return em28xx_write_regs(dev, reg->reg, (char *)&buf,
886 em28xx_reg_len(reg->reg));
887 }
888 #endif
889
890
891 static int vidioc_cropcap(struct file *file, void *priv,
892 struct v4l2_cropcap *cc)
893 {
894 struct em28xx_fh *fh = priv;
895 struct em28xx *dev = fh->dev;
896
897 if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
898 return -EINVAL;
899
900 cc->bounds.left = 0;
901 cc->bounds.top = 0;
902 cc->bounds.width = dev->width;
903 cc->bounds.height = dev->height;
904 cc->defrect = cc->bounds;
905 cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
906 cc->pixelaspect.denominator = 59;
907
908 return 0;
909 }
910
911 static int vidioc_streamon(struct file *file, void *priv,
912 enum v4l2_buf_type type)
913 {
914 struct em28xx_fh *fh = priv;
915 struct em28xx *dev = fh->dev;
916 int rc;
917
918 rc = check_dev(dev);
919 if (rc < 0)
920 return rc;
921
922 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
923 return -EINVAL;
924
925 if (list_empty(&dev->inqueue))
926 return -EINVAL;
927
928 mutex_lock(&dev->lock);
929
930 if (unlikely(res_get(fh) < 0)) {
931 mutex_unlock(&dev->lock);
932 return -EBUSY;
933 }
934
935 dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
936
937 mutex_unlock(&dev->lock);
938 return 0;
939 }
940
941 static int vidioc_streamoff(struct file *file, void *priv,
942 enum v4l2_buf_type type)
943 {
944 struct em28xx_fh *fh = priv;
945 struct em28xx *dev = fh->dev;
946 int rc;
947
948 rc = check_dev(dev);
949 if (rc < 0)
950 return rc;
951
952 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
953 return -EINVAL;
954
955 mutex_lock(&dev->lock);
956
957 if (dev->stream == STREAM_ON) {
958 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
959 rc = em28xx_stream_interrupt(dev);
960 if (rc < 0) {
961 mutex_unlock(&dev->lock);
962 return rc;
963 }
964 }
965
966 em28xx_empty_framequeues(dev);
967
968 mutex_unlock(&dev->lock);
969 return 0;
970 }
971
972 static int vidioc_querycap(struct file *file, void *priv,
973 struct v4l2_capability *cap)
974 {
975 struct em28xx_fh *fh = priv;
976 struct em28xx *dev = fh->dev;
977
978 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
979 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
980 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
981
982 cap->version = EM28XX_VERSION_CODE;
983
984 cap->capabilities =
985 V4L2_CAP_SLICED_VBI_CAPTURE |
986 V4L2_CAP_VIDEO_CAPTURE |
987 V4L2_CAP_AUDIO |
988 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
989
990 if (dev->tuner_type != TUNER_ABSENT)
991 cap->capabilities |= V4L2_CAP_TUNER;
992
993 return 0;
994 }
995
996 static int vidioc_enum_fmt_cap(struct file *file, void *priv,
997 struct v4l2_fmtdesc *fmtd)
998 {
999 if (fmtd->index != 0)
1000 return -EINVAL;
1001
1002 fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1003 strcpy(fmtd->description, "Packed YUY2");
1004 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
1005 memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
1006
1007 return 0;
1008 }
1009
1010 /* Sliced VBI ioctls */
1011 static int vidioc_g_fmt_vbi_capture(struct file *file, void *priv,
1012 struct v4l2_format *f)
1013 {
1014 struct em28xx_fh *fh = priv;
1015 struct em28xx *dev = fh->dev;
1016 int rc;
1017
1018 rc = check_dev(dev);
1019 if (rc < 0)
1020 return rc;
1021
1022 mutex_lock(&dev->lock);
1023
1024 f->fmt.sliced.service_set = 0;
1025
1026 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1027
1028 if (f->fmt.sliced.service_set == 0)
1029 rc = -EINVAL;
1030
1031 mutex_unlock(&dev->lock);
1032 return rc;
1033 }
1034
1035 static int vidioc_try_set_vbi_capture(struct file *file, void *priv,
1036 struct v4l2_format *f)
1037 {
1038 struct em28xx_fh *fh = priv;
1039 struct em28xx *dev = fh->dev;
1040 int rc;
1041
1042 rc = check_dev(dev);
1043 if (rc < 0)
1044 return rc;
1045
1046 mutex_lock(&dev->lock);
1047 em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
1048 mutex_unlock(&dev->lock);
1049
1050 if (f->fmt.sliced.service_set == 0)
1051 return -EINVAL;
1052
1053 return 0;
1054 }
1055
1056
1057 static int vidioc_reqbufs(struct file *file, void *priv,
1058 struct v4l2_requestbuffers *rb)
1059 {
1060 struct em28xx_fh *fh = priv;
1061 struct em28xx *dev = fh->dev;
1062 u32 i;
1063 int rc;
1064
1065 rc = check_dev(dev);
1066 if (rc < 0)
1067 return rc;
1068
1069 if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1070 rb->memory != V4L2_MEMORY_MMAP)
1071 return -EINVAL;
1072
1073 if (dev->io == IO_READ) {
1074 em28xx_videodbg("method is set to read;"
1075 " close and open the device again to"
1076 " choose the mmap I/O method\n");
1077 return -EINVAL;
1078 }
1079
1080 for (i = 0; i < dev->num_frames; i++)
1081 if (dev->frame[i].vma_use_count) {
1082 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1083 "previous buffers are still mapped\n");
1084 return -EINVAL;
1085 }
1086
1087 mutex_lock(&dev->lock);
1088
1089 if (dev->stream == STREAM_ON) {
1090 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1091 rc = em28xx_stream_interrupt(dev);
1092 if (rc < 0) {
1093 mutex_unlock(&dev->lock);
1094 return rc;
1095 }
1096 }
1097
1098 em28xx_empty_framequeues(dev);
1099
1100 em28xx_release_buffers(dev);
1101 if (rb->count)
1102 rb->count = em28xx_request_buffers(dev, rb->count);
1103
1104 dev->frame_current = NULL;
1105 dev->io = rb->count ? IO_MMAP : IO_NONE;
1106
1107 mutex_unlock(&dev->lock);
1108 return 0;
1109 }
1110
1111 static int vidioc_querybuf(struct file *file, void *priv,
1112 struct v4l2_buffer *b)
1113 {
1114 struct em28xx_fh *fh = priv;
1115 struct em28xx *dev = fh->dev;
1116 int rc;
1117
1118 rc = check_dev(dev);
1119 if (rc < 0)
1120 return rc;
1121
1122 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1123 b->index >= dev->num_frames || dev->io != IO_MMAP)
1124 return -EINVAL;
1125
1126 mutex_lock(&dev->lock);
1127
1128 memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
1129
1130 if (dev->frame[b->index].vma_use_count)
1131 b->flags |= V4L2_BUF_FLAG_MAPPED;
1132
1133 if (dev->frame[b->index].state == F_DONE)
1134 b->flags |= V4L2_BUF_FLAG_DONE;
1135 else if (dev->frame[b->index].state != F_UNUSED)
1136 b->flags |= V4L2_BUF_FLAG_QUEUED;
1137
1138 mutex_unlock(&dev->lock);
1139 return 0;
1140 }
1141
1142 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1143 {
1144 struct em28xx_fh *fh = priv;
1145 struct em28xx *dev = fh->dev;
1146 unsigned long lock_flags;
1147 int rc;
1148
1149 rc = check_dev(dev);
1150 if (rc < 0)
1151 return rc;
1152
1153 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP ||
1154 b->index >= dev->num_frames)
1155 return -EINVAL;
1156
1157 if (dev->frame[b->index].state != F_UNUSED)
1158 return -EAGAIN;
1159
1160 dev->frame[b->index].state = F_QUEUED;
1161
1162 /* add frame to fifo */
1163 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1164 list_add_tail(&dev->frame[b->index].frame, &dev->inqueue);
1165 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1166
1167 return 0;
1168 }
1169
1170 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
1171 {
1172 struct em28xx_fh *fh = priv;
1173 struct em28xx *dev = fh->dev;
1174 int rc;
1175 struct em28xx_frame_t *f;
1176 unsigned long lock_flags;
1177
1178 rc = check_dev(dev);
1179 if (rc < 0)
1180 return rc;
1181
1182 if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || dev->io != IO_MMAP)
1183 return -EINVAL;
1184
1185 if (list_empty(&dev->outqueue)) {
1186 if (dev->stream == STREAM_OFF)
1187 return -EINVAL;
1188
1189 if (file->f_flags & O_NONBLOCK)
1190 return -EAGAIN;
1191
1192 rc = wait_event_interruptible(dev->wait_frame,
1193 (!list_empty(&dev->outqueue)) ||
1194 (dev->state & DEV_DISCONNECTED));
1195 if (rc)
1196 return rc;
1197
1198 if (dev->state & DEV_DISCONNECTED)
1199 return -ENODEV;
1200 }
1201
1202 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1203 f = list_entry(dev->outqueue.next, struct em28xx_frame_t, frame);
1204 list_del(dev->outqueue.next);
1205 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1206
1207 f->state = F_UNUSED;
1208 memcpy(b, &f->buf, sizeof(*b));
1209
1210 if (f->vma_use_count)
1211 b->flags |= V4L2_BUF_FLAG_MAPPED;
1212
1213 return 0;
1214 }
1215
1216 /* ----------------------------------------------------------- */
1217 /* RADIO ESPECIFIC IOCTLS */
1218 /* ----------------------------------------------------------- */
1219
1220 static int radio_querycap(struct file *file, void *priv,
1221 struct v4l2_capability *cap)
1222 {
1223 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1224
1225 strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
1226 strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
1227 strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
1228
1229 cap->version = EM28XX_VERSION_CODE;
1230 cap->capabilities = V4L2_CAP_TUNER;
1231 return 0;
1232 }
1233
1234 static int radio_g_tuner(struct file *file, void *priv,
1235 struct v4l2_tuner *t)
1236 {
1237 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1238
1239 if (unlikely(t->index > 0))
1240 return -EINVAL;
1241
1242 strcpy(t->name, "Radio");
1243 t->type = V4L2_TUNER_RADIO;
1244
1245 em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
1246 return 0;
1247 }
1248
1249 static int radio_enum_input(struct file *file, void *priv,
1250 struct v4l2_input *i)
1251 {
1252 if (i->index != 0)
1253 return -EINVAL;
1254 strcpy(i->name, "Radio");
1255 i->type = V4L2_INPUT_TYPE_TUNER;
1256
1257 return 0;
1258 }
1259
1260 static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
1261 {
1262 if (unlikely(a->index))
1263 return -EINVAL;
1264
1265 strcpy(a->name, "Radio");
1266 return 0;
1267 }
1268
1269 static int radio_s_tuner(struct file *file, void *priv,
1270 struct v4l2_tuner *t)
1271 {
1272 struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
1273
1274 if (0 != t->index)
1275 return -EINVAL;
1276
1277 em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
1278
1279 return 0;
1280 }
1281
1282 static int radio_s_audio(struct file *file, void *fh,
1283 struct v4l2_audio *a)
1284 {
1285 return 0;
1286 }
1287
1288 static int radio_s_input(struct file *file, void *fh, unsigned int i)
1289 {
1290 return 0;
1291 }
1292
1293 static int radio_queryctrl(struct file *file, void *priv,
1294 struct v4l2_queryctrl *qc)
1295 {
1296 int i;
1297
1298 if (qc->id < V4L2_CID_BASE ||
1299 qc->id >= V4L2_CID_LASTP1)
1300 return -EINVAL;
1301
1302 for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
1303 if (qc->id && qc->id == em28xx_qctrl[i].id) {
1304 memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
1305 return 0;
1306 }
1307 }
1308
1309 return -EINVAL;
1310 }
1311
1312 /*
1313 * em28xx_v4l2_open()
1314 * inits the device and starts isoc transfer
1315 */
1316 static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
1317 {
1318 int minor = iminor(inode);
1319 int errCode = 0, radio = 0;
1320 struct em28xx *h,*dev = NULL;
1321 struct em28xx_fh *fh;
1322
1323 list_for_each_entry(h, &em28xx_devlist, devlist) {
1324 if (h->vdev->minor == minor) {
1325 dev = h;
1326 dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1327 }
1328 if (h->vbi_dev->minor == minor) {
1329 dev = h;
1330 dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
1331 }
1332 if (h->radio_dev &&
1333 h->radio_dev->minor == minor) {
1334 radio = 1;
1335 dev = h;
1336 }
1337 }
1338 if (NULL == dev)
1339 return -ENODEV;
1340
1341 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1342 minor,v4l2_type_names[dev->type],dev->users);
1343
1344 fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
1345
1346 if (!fh) {
1347 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1348 return -ENOMEM;
1349 }
1350 mutex_lock(&dev->lock);
1351 fh->dev = dev;
1352 fh->radio = radio;
1353 filp->private_data = fh;
1354
1355 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
1356 em28xx_set_alternate(dev);
1357
1358 dev->width = norm_maxw(dev);
1359 dev->height = norm_maxh(dev);
1360 dev->frame_size = dev->width * dev->height * 2;
1361 dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1362 dev->bytesperline = dev->width * 2;
1363 dev->hscale = 0;
1364 dev->vscale = 0;
1365
1366 em28xx_capture_start(dev, 1);
1367 em28xx_resolution_set(dev);
1368
1369
1370 /* start the transfer */
1371 errCode = em28xx_init_isoc(dev);
1372 if (errCode)
1373 goto err;
1374
1375 em28xx_empty_framequeues(dev);
1376 }
1377 if (fh->radio) {
1378 em28xx_videodbg("video_open: setting radio device\n");
1379 em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
1380 }
1381
1382 dev->users++;
1383
1384 err:
1385 mutex_unlock(&dev->lock);
1386 return errCode;
1387 }
1388
1389 /*
1390 * em28xx_realease_resources()
1391 * unregisters the v4l2,i2c and usb devices
1392 * called when the device gets disconected or at module unload
1393 */
1394 static void em28xx_release_resources(struct em28xx *dev)
1395 {
1396
1397 /*FIXME: I2C IR should be disconnected */
1398
1399 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1400 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
1401 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
1402 list_del(&dev->devlist);
1403 if (dev->radio_dev) {
1404 if (-1 != dev->radio_dev->minor)
1405 video_unregister_device(dev->radio_dev);
1406 else
1407 video_device_release(dev->radio_dev);
1408 dev->radio_dev = NULL;
1409 }
1410 if (dev->vbi_dev) {
1411 if (-1 != dev->vbi_dev->minor)
1412 video_unregister_device(dev->vbi_dev);
1413 else
1414 video_device_release(dev->vbi_dev);
1415 dev->vbi_dev = NULL;
1416 }
1417 if (dev->vdev) {
1418 if (-1 != dev->vdev->minor)
1419 video_unregister_device(dev->vdev);
1420 else
1421 video_device_release(dev->vdev);
1422 dev->vdev = NULL;
1423 }
1424 em28xx_i2c_unregister(dev);
1425 usb_put_dev(dev->udev);
1426
1427 /* Mark device as unused */
1428 em28xx_devused&=~(1<<dev->devno);
1429 }
1430
1431 /*
1432 * em28xx_v4l2_close()
1433 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1434 */
1435 static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
1436 {
1437 struct em28xx_fh *fh = filp->private_data;
1438 struct em28xx *dev = fh->dev;
1439 int errCode;
1440
1441 em28xx_videodbg("users=%d\n", dev->users);
1442
1443
1444 if (res_check(fh))
1445 res_free(fh);
1446
1447 mutex_lock(&dev->lock);
1448
1449 if (dev->users == 1) {
1450 em28xx_uninit_isoc(dev);
1451 em28xx_release_buffers(dev);
1452 dev->io = IO_NONE;
1453
1454 /* the device is already disconnect,
1455 free the remaining resources */
1456 if (dev->state & DEV_DISCONNECTED) {
1457 em28xx_release_resources(dev);
1458 mutex_unlock(&dev->lock);
1459 kfree(dev);
1460 return 0;
1461 }
1462
1463 /* set alternate 0 */
1464 dev->alt = 0;
1465 em28xx_videodbg("setting alternate 0\n");
1466 errCode = usb_set_interface(dev->udev, 0, 0);
1467 if (errCode < 0) {
1468 em28xx_errdev("cannot change alternate number to "
1469 "0 (error=%i)\n", errCode);
1470 }
1471 }
1472 kfree(fh);
1473 dev->users--;
1474 wake_up_interruptible_nr(&dev->open, 1);
1475 mutex_unlock(&dev->lock);
1476 return 0;
1477 }
1478
1479 /*
1480 * em28xx_v4l2_read()
1481 * will allocate buffers when called for the first time
1482 */
1483 static ssize_t
1484 em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
1485 loff_t * f_pos)
1486 {
1487 struct em28xx_frame_t *f, *i;
1488 unsigned long lock_flags;
1489 int ret = 0;
1490 struct em28xx_fh *fh = filp->private_data;
1491 struct em28xx *dev = fh->dev;
1492
1493 /* FIXME: read() is not prepared to allow changing the video
1494 resolution while streaming. Seems a bug at em28xx_set_fmt
1495 */
1496
1497 if (unlikely(res_get(fh) < 0))
1498 return -EBUSY;
1499
1500 mutex_lock(&dev->lock);
1501
1502 if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1503 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1504
1505 if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
1506 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1507 em28xx_videodbg("not supported yet! ...\n");
1508 if (copy_to_user(buf, "", 1)) {
1509 mutex_unlock(&dev->lock);
1510 return -EFAULT;
1511 }
1512 mutex_unlock(&dev->lock);
1513 return (1);
1514 }
1515 if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
1516 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1517 em28xx_videodbg("not supported yet! ...\n");
1518 if (copy_to_user(buf, "", 1)) {
1519 mutex_unlock(&dev->lock);
1520 return -EFAULT;
1521 }
1522 mutex_unlock(&dev->lock);
1523 return (1);
1524 }
1525
1526 if (dev->state & DEV_DISCONNECTED) {
1527 em28xx_videodbg("device not present\n");
1528 mutex_unlock(&dev->lock);
1529 return -ENODEV;
1530 }
1531
1532 if (dev->state & DEV_MISCONFIGURED) {
1533 em28xx_videodbg("device misconfigured; close and open it again\n");
1534 mutex_unlock(&dev->lock);
1535 return -EIO;
1536 }
1537
1538 if (dev->io == IO_MMAP) {
1539 em28xx_videodbg ("IO method is set to mmap; close and open"
1540 " the device again to choose the read method\n");
1541 mutex_unlock(&dev->lock);
1542 return -EINVAL;
1543 }
1544
1545 if (dev->io == IO_NONE) {
1546 if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
1547 em28xx_errdev("read failed, not enough memory\n");
1548 mutex_unlock(&dev->lock);
1549 return -ENOMEM;
1550 }
1551 dev->io = IO_READ;
1552 dev->stream = STREAM_ON;
1553 em28xx_queue_unusedframes(dev);
1554 }
1555
1556 if (!count) {
1557 mutex_unlock(&dev->lock);
1558 return 0;
1559 }
1560
1561 if (list_empty(&dev->outqueue)) {
1562 if (filp->f_flags & O_NONBLOCK) {
1563 mutex_unlock(&dev->lock);
1564 return -EAGAIN;
1565 }
1566 ret = wait_event_interruptible
1567 (dev->wait_frame,
1568 (!list_empty(&dev->outqueue)) ||
1569 (dev->state & DEV_DISCONNECTED));
1570 if (ret) {
1571 mutex_unlock(&dev->lock);
1572 return ret;
1573 }
1574 if (dev->state & DEV_DISCONNECTED) {
1575 mutex_unlock(&dev->lock);
1576 return -ENODEV;
1577 }
1578 dev->video_bytesread = 0;
1579 }
1580
1581 f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
1582
1583 em28xx_queue_unusedframes(dev);
1584
1585 if (count > f->buf.length)
1586 count = f->buf.length;
1587
1588 if ((dev->video_bytesread + count) > dev->frame_size)
1589 count = dev->frame_size - dev->video_bytesread;
1590
1591 if (copy_to_user(buf, f->bufmem+dev->video_bytesread, count)) {
1592 em28xx_err("Error while copying to user\n");
1593 return -EFAULT;
1594 }
1595 dev->video_bytesread += count;
1596
1597 if (dev->video_bytesread == dev->frame_size) {
1598 spin_lock_irqsave(&dev->queue_lock, lock_flags);
1599 list_for_each_entry(i, &dev->outqueue, frame)
1600 i->state = F_UNUSED;
1601 INIT_LIST_HEAD(&dev->outqueue);
1602 spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
1603
1604 em28xx_queue_unusedframes(dev);
1605 dev->video_bytesread = 0;
1606 }
1607
1608 *f_pos += count;
1609
1610 mutex_unlock(&dev->lock);
1611
1612 return count;
1613 }
1614
1615 /*
1616 * em28xx_v4l2_poll()
1617 * will allocate buffers when called for the first time
1618 */
1619 static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
1620 {
1621 unsigned int mask = 0;
1622 struct em28xx_fh *fh = filp->private_data;
1623 struct em28xx *dev = fh->dev;
1624
1625 if (unlikely(res_get(fh) < 0))
1626 return POLLERR;
1627
1628 mutex_lock(&dev->lock);
1629
1630 if (dev->state & DEV_DISCONNECTED) {
1631 em28xx_videodbg("device not present\n");
1632 } else if (dev->state & DEV_MISCONFIGURED) {
1633 em28xx_videodbg("device is misconfigured; close and open it again\n");
1634 } else {
1635 if (dev->io == IO_NONE) {
1636 if (!em28xx_request_buffers
1637 (dev, EM28XX_NUM_READ_FRAMES)) {
1638 em28xx_warn
1639 ("poll() failed, not enough memory\n");
1640 } else {
1641 dev->io = IO_READ;
1642 dev->stream = STREAM_ON;
1643 }
1644 }
1645
1646 if (dev->io == IO_READ) {
1647 em28xx_queue_unusedframes(dev);
1648 poll_wait(filp, &dev->wait_frame, wait);
1649
1650 if (!list_empty(&dev->outqueue))
1651 mask |= POLLIN | POLLRDNORM;
1652
1653 mutex_unlock(&dev->lock);
1654
1655 return mask;
1656 }
1657 }
1658
1659 mutex_unlock(&dev->lock);
1660 return POLLERR;
1661 }
1662
1663 /*
1664 * em28xx_v4l2_mmap()
1665 */
1666 static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
1667 {
1668 struct em28xx_fh *fh = filp->private_data;
1669 struct em28xx *dev = fh->dev;
1670 unsigned long size = vma->vm_end - vma->vm_start;
1671 unsigned long start = vma->vm_start;
1672 void *pos;
1673 u32 i;
1674
1675 if (unlikely(res_get(fh) < 0))
1676 return -EBUSY;
1677
1678 mutex_lock(&dev->lock);
1679
1680 if (dev->state & DEV_DISCONNECTED) {
1681 em28xx_videodbg("mmap: device not present\n");
1682 mutex_unlock(&dev->lock);
1683 return -ENODEV;
1684 }
1685
1686 if (dev->state & DEV_MISCONFIGURED) {
1687 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1688 "open it again\n");
1689 mutex_unlock(&dev->lock);
1690 return -EIO;
1691 }
1692
1693 if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE)) {
1694 mutex_unlock(&dev->lock);
1695 return -EINVAL;
1696 }
1697
1698 if (size > PAGE_ALIGN(dev->frame[0].buf.length))
1699 size = PAGE_ALIGN(dev->frame[0].buf.length);
1700
1701 for (i = 0; i < dev->num_frames; i++) {
1702 if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
1703 break;
1704 }
1705 if (i == dev->num_frames) {
1706 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1707 mutex_unlock(&dev->lock);
1708 return -EINVAL;
1709 }
1710
1711 /* VM_IO is eventually going to replace PageReserved altogether */
1712 vma->vm_flags |= VM_IO;
1713 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
1714
1715 pos = dev->frame[i].bufmem;
1716 while (size > 0) { /* size is page-aligned */
1717 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1718 em28xx_videodbg("mmap: vm_insert_page failed\n");
1719 mutex_unlock(&dev->lock);
1720 return -EAGAIN;
1721 }
1722 start += PAGE_SIZE;
1723 pos += PAGE_SIZE;
1724 size -= PAGE_SIZE;
1725 }
1726
1727 vma->vm_ops = &em28xx_vm_ops;
1728 vma->vm_private_data = &dev->frame[i];
1729
1730 em28xx_vm_open(vma);
1731 mutex_unlock(&dev->lock);
1732 return 0;
1733 }
1734
1735 static const struct file_operations em28xx_v4l_fops = {
1736 .owner = THIS_MODULE,
1737 .open = em28xx_v4l2_open,
1738 .release = em28xx_v4l2_close,
1739 .read = em28xx_v4l2_read,
1740 .poll = em28xx_v4l2_poll,
1741 .mmap = em28xx_v4l2_mmap,
1742 .ioctl = video_ioctl2,
1743 .llseek = no_llseek,
1744 .compat_ioctl = v4l_compat_ioctl32,
1745 };
1746
1747 static const struct file_operations radio_fops = {
1748 .owner = THIS_MODULE,
1749 .open = em28xx_v4l2_open,
1750 .release = em28xx_v4l2_close,
1751 .ioctl = video_ioctl2,
1752 .compat_ioctl = v4l_compat_ioctl32,
1753 .llseek = no_llseek,
1754 };
1755
1756 static const struct video_device em28xx_video_template = {
1757 .fops = &em28xx_v4l_fops,
1758 .release = video_device_release,
1759
1760 .minor = -1,
1761 .vidioc_querycap = vidioc_querycap,
1762 .vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
1763 .vidioc_g_fmt_cap = vidioc_g_fmt_cap,
1764 .vidioc_try_fmt_cap = vidioc_try_fmt_cap,
1765 .vidioc_s_fmt_cap = vidioc_s_fmt_cap,
1766 .vidioc_g_audio = vidioc_g_audio,
1767 .vidioc_s_audio = vidioc_s_audio,
1768 .vidioc_cropcap = vidioc_cropcap,
1769
1770 .vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
1771 .vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1772 .vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
1773
1774 .vidioc_reqbufs = vidioc_reqbufs,
1775 .vidioc_querybuf = vidioc_querybuf,
1776 .vidioc_qbuf = vidioc_qbuf,
1777 .vidioc_dqbuf = vidioc_dqbuf,
1778 .vidioc_s_std = vidioc_s_std,
1779 .vidioc_enum_input = vidioc_enum_input,
1780 .vidioc_g_input = vidioc_g_input,
1781 .vidioc_s_input = vidioc_s_input,
1782 .vidioc_queryctrl = vidioc_queryctrl,
1783 .vidioc_g_ctrl = vidioc_g_ctrl,
1784 .vidioc_s_ctrl = vidioc_s_ctrl,
1785 .vidioc_streamon = vidioc_streamon,
1786 .vidioc_streamoff = vidioc_streamoff,
1787 .vidioc_g_tuner = vidioc_g_tuner,
1788 .vidioc_s_tuner = vidioc_s_tuner,
1789 .vidioc_g_frequency = vidioc_g_frequency,
1790 .vidioc_s_frequency = vidioc_s_frequency,
1791 #ifdef CONFIG_VIDEO_ADV_DEBUG
1792 .vidioc_g_register = vidioc_g_register,
1793 .vidioc_s_register = vidioc_s_register,
1794 #endif
1795
1796 .tvnorms = V4L2_STD_ALL,
1797 .current_norm = V4L2_STD_PAL,
1798 };
1799
1800 static struct video_device em28xx_radio_template = {
1801 .name = "em28xx-radio",
1802 .type = VID_TYPE_TUNER,
1803 .fops = &radio_fops,
1804 .minor = -1,
1805 .vidioc_querycap = radio_querycap,
1806 .vidioc_g_tuner = radio_g_tuner,
1807 .vidioc_enum_input = radio_enum_input,
1808 .vidioc_g_audio = radio_g_audio,
1809 .vidioc_s_tuner = radio_s_tuner,
1810 .vidioc_s_audio = radio_s_audio,
1811 .vidioc_s_input = radio_s_input,
1812 .vidioc_queryctrl = radio_queryctrl,
1813 .vidioc_g_ctrl = vidioc_g_ctrl,
1814 .vidioc_s_ctrl = vidioc_s_ctrl,
1815 .vidioc_g_frequency = vidioc_g_frequency,
1816 .vidioc_s_frequency = vidioc_s_frequency,
1817 #ifdef CONFIG_VIDEO_ADV_DEBUG
1818 .vidioc_g_register = vidioc_g_register,
1819 .vidioc_s_register = vidioc_s_register,
1820 #endif
1821 };
1822
1823 /******************************** usb interface *****************************************/
1824
1825
1826 static LIST_HEAD(em28xx_extension_devlist);
1827 static DEFINE_MUTEX(em28xx_extension_devlist_lock);
1828
1829 int em28xx_register_extension(struct em28xx_ops *ops)
1830 {
1831 struct em28xx *h, *dev = NULL;
1832
1833 list_for_each_entry(h, &em28xx_devlist, devlist)
1834 dev = h;
1835
1836 mutex_lock(&em28xx_extension_devlist_lock);
1837 list_add_tail(&ops->next, &em28xx_extension_devlist);
1838 if (dev)
1839 ops->init(dev);
1840
1841 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1842 mutex_unlock(&em28xx_extension_devlist_lock);
1843
1844 return 0;
1845 }
1846 EXPORT_SYMBOL(em28xx_register_extension);
1847
1848 void em28xx_unregister_extension(struct em28xx_ops *ops)
1849 {
1850 struct em28xx *h, *dev = NULL;
1851
1852 list_for_each_entry(h, &em28xx_devlist, devlist)
1853 dev = h;
1854
1855 if (dev)
1856 ops->fini(dev);
1857
1858 mutex_lock(&em28xx_extension_devlist_lock);
1859 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1860 list_del(&ops->next);
1861 mutex_unlock(&em28xx_extension_devlist_lock);
1862 }
1863 EXPORT_SYMBOL(em28xx_unregister_extension);
1864
1865 static struct video_device *em28xx_vdev_init(struct em28xx *dev,
1866 const struct video_device *template,
1867 const int type,
1868 const char *type_name)
1869 {
1870 struct video_device *vfd;
1871
1872 vfd = video_device_alloc();
1873 if (NULL == vfd)
1874 return NULL;
1875 *vfd = *template;
1876 vfd->minor = -1;
1877 vfd->dev = &dev->udev->dev;
1878 vfd->release = video_device_release;
1879 vfd->type = type;
1880
1881 snprintf(vfd->name, sizeof(vfd->name), "%s %s",
1882 dev->name, type_name);
1883
1884 return vfd;
1885 }
1886
1887
1888 /*
1889 * em28xx_init_dev()
1890 * allocates and inits the device structs, registers i2c bus and v4l device
1891 */
1892 static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
1893 int minor)
1894 {
1895 struct em28xx_ops *ops = NULL;
1896 struct em28xx *dev = *devhandle;
1897 int retval = -ENOMEM;
1898 int errCode;
1899 unsigned int maxh, maxw;
1900
1901 dev->udev = udev;
1902 mutex_init(&dev->lock);
1903 spin_lock_init(&dev->queue_lock);
1904 init_waitqueue_head(&dev->open);
1905 init_waitqueue_head(&dev->wait_frame);
1906 init_waitqueue_head(&dev->wait_stream);
1907
1908 dev->em28xx_write_regs = em28xx_write_regs;
1909 dev->em28xx_read_reg = em28xx_read_reg;
1910 dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
1911 dev->em28xx_write_regs_req = em28xx_write_regs_req;
1912 dev->em28xx_read_reg_req = em28xx_read_reg_req;
1913 dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
1914
1915 errCode = em28xx_read_reg(dev, CHIPID_REG);
1916 if (errCode >= 0)
1917 em28xx_info("em28xx chip ID = %d\n", errCode);
1918
1919 em28xx_pre_card_setup(dev);
1920
1921 errCode = em28xx_config(dev);
1922 if (errCode) {
1923 em28xx_errdev("error configuring device\n");
1924 em28xx_devused &= ~(1<<dev->devno);
1925 kfree(dev);
1926 return -ENOMEM;
1927 }
1928
1929 /* register i2c bus */
1930 em28xx_i2c_register(dev);
1931
1932 /* Do board specific init and eeprom reading */
1933 em28xx_card_setup(dev);
1934
1935 /* Configure audio */
1936 em28xx_audio_analog_set(dev);
1937
1938 /* configure the device */
1939 em28xx_config_i2c(dev);
1940
1941 /* set default norm */
1942 dev->norm = em28xx_video_template.current_norm;
1943
1944 maxw = norm_maxw(dev);
1945 maxh = norm_maxh(dev);
1946
1947 /* set default image size */
1948 dev->width = maxw;
1949 dev->height = maxh;
1950 dev->interlaced = EM28XX_INTERLACED_DEFAULT;
1951 dev->field_size = dev->width * dev->height;
1952 dev->frame_size =
1953 dev->interlaced ? dev->field_size << 1 : dev->field_size;
1954 dev->bytesperline = dev->width * 2;
1955 dev->hscale = 0;
1956 dev->vscale = 0;
1957 dev->ctl_input = 2;
1958
1959 errCode = em28xx_config(dev);
1960
1961 list_add_tail(&dev->devlist, &em28xx_devlist);
1962
1963 /* allocate and fill video video_device struct */
1964 dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
1965 VID_TYPE_CAPTURE, "video");
1966 if (NULL == dev->vdev) {
1967 em28xx_errdev("cannot allocate video_device.\n");
1968 goto fail_unreg;
1969 }
1970 if (dev->tuner_type != TUNER_ABSENT)
1971 dev->vdev->type |= VID_TYPE_TUNER;
1972
1973 /* register v4l2 video video_device */
1974 retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
1975 video_nr[dev->devno]);
1976 if (retval) {
1977 em28xx_errdev("unable to register video device (error=%i).\n",
1978 retval);
1979 goto fail_unreg;
1980 }
1981
1982 /* Allocate and fill vbi video_device struct */
1983 dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
1984 VFL_TYPE_VBI, "vbi");
1985 /* register v4l2 vbi video_device */
1986 if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
1987 vbi_nr[dev->devno]) < 0) {
1988 em28xx_errdev("unable to register vbi device\n");
1989 retval = -ENODEV;
1990 goto fail_unreg;
1991 }
1992
1993 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
1994 dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
1995 VFL_TYPE_RADIO, "radio");
1996 if (NULL == dev->radio_dev) {
1997 em28xx_errdev("cannot allocate video_device.\n");
1998 goto fail_unreg;
1999 }
2000 retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
2001 radio_nr[dev->devno]);
2002 if (retval < 0) {
2003 em28xx_errdev("can't register radio device\n");
2004 goto fail_unreg;
2005 }
2006 em28xx_info("Registered radio device as /dev/radio%d\n",
2007 dev->radio_dev->minor & 0x1f);
2008 }
2009
2010
2011 if (dev->has_msp34xx) {
2012 /* Send a reset to other chips via gpio */
2013 em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
2014 msleep(3);
2015 em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
2016 msleep(3);
2017 }
2018
2019 video_mux(dev, 0);
2020
2021 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2022 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
2023 dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
2024
2025 mutex_lock(&em28xx_extension_devlist_lock);
2026 if (!list_empty(&em28xx_extension_devlist)) {
2027 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2028 if (ops->id)
2029 ops->init(dev);
2030 }
2031 }
2032 mutex_unlock(&em28xx_extension_devlist_lock);
2033
2034 return 0;
2035
2036 fail_unreg:
2037 em28xx_release_resources(dev);
2038 mutex_unlock(&dev->lock);
2039 kfree(dev);
2040 return retval;
2041 }
2042
2043 #if defined(CONFIG_MODULES) && defined(MODULE)
2044 static void request_module_async(struct work_struct *work)
2045 {
2046 struct em28xx *dev = container_of(work,
2047 struct em28xx, request_module_wk);
2048
2049 if (dev->has_audio_class)
2050 request_module("snd-usb-audio");
2051 else
2052 request_module("em28xx-alsa");
2053 }
2054
2055 static void request_modules(struct em28xx *dev)
2056 {
2057 INIT_WORK(&dev->request_module_wk, request_module_async);
2058 schedule_work(&dev->request_module_wk);
2059 }
2060 #else
2061 #define request_modules(dev)
2062 #endif /* CONFIG_MODULES */
2063
2064 /*
2065 * em28xx_usb_probe()
2066 * checks for supported devices
2067 */
2068 static int em28xx_usb_probe(struct usb_interface *interface,
2069 const struct usb_device_id *id)
2070 {
2071 const struct usb_endpoint_descriptor *endpoint;
2072 struct usb_device *udev;
2073 struct usb_interface *uif;
2074 struct em28xx *dev = NULL;
2075 int retval = -ENODEV;
2076 int i, nr, ifnum;
2077
2078 udev = usb_get_dev(interface_to_usbdev(interface));
2079 ifnum = interface->altsetting[0].desc.bInterfaceNumber;
2080
2081 /* Check to see next free device and mark as used */
2082 nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
2083 em28xx_devused|=1<<nr;
2084
2085 /* Don't register audio interfaces */
2086 if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2087 em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
2088 udev->descriptor.idVendor,udev->descriptor.idProduct,
2089 ifnum,
2090 interface->altsetting[0].desc.bInterfaceClass);
2091
2092 em28xx_devused&=~(1<<nr);
2093 return -ENODEV;
2094 }
2095
2096 em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
2097 udev->descriptor.idVendor,udev->descriptor.idProduct,
2098 ifnum,
2099 interface->altsetting[0].desc.bInterfaceClass);
2100
2101 endpoint = &interface->cur_altsetting->endpoint[1].desc;
2102
2103 /* check if the device has the iso in endpoint at the correct place */
2104 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2105 USB_ENDPOINT_XFER_ISOC) {
2106 em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
2107 em28xx_devused&=~(1<<nr);
2108 return -ENODEV;
2109 }
2110 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
2111 em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
2112 em28xx_devused&=~(1<<nr);
2113 return -ENODEV;
2114 }
2115
2116 if (nr >= EM28XX_MAXBOARDS) {
2117 printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
2118 em28xx_devused&=~(1<<nr);
2119 return -ENOMEM;
2120 }
2121
2122 /* allocate memory for our device state and initialize it */
2123 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2124 if (dev == NULL) {
2125 em28xx_err(DRIVER_NAME ": out of memory!\n");
2126 em28xx_devused&=~(1<<nr);
2127 return -ENOMEM;
2128 }
2129
2130 snprintf(dev->name, 29, "em28xx #%d", nr);
2131 dev->devno = nr;
2132 dev->model = id->driver_info;
2133
2134 /* Checks if audio is provided by some interface */
2135 for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
2136 uif = udev->config->interface[i];
2137 if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
2138 dev->has_audio_class = 1;
2139 break;
2140 }
2141 }
2142
2143 printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
2144 dev->has_audio_class ? "Has" : "Doesn't have");
2145
2146 /* compute alternate max packet sizes */
2147 uif = udev->actconfig->interface[0];
2148
2149 dev->num_alt=uif->num_altsetting;
2150 em28xx_info("Alternate settings: %i\n",dev->num_alt);
2151 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2152 dev->alt_max_pkt_size = kmalloc(32*
2153 dev->num_alt,GFP_KERNEL);
2154 if (dev->alt_max_pkt_size == NULL) {
2155 em28xx_errdev("out of memory!\n");
2156 em28xx_devused&=~(1<<nr);
2157 kfree(dev);
2158 return -ENOMEM;
2159 }
2160
2161 for (i = 0; i < dev->num_alt ; i++) {
2162 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
2163 wMaxPacketSize);
2164 dev->alt_max_pkt_size[i] =
2165 (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
2166 em28xx_info("Alternate setting %i, max size= %i\n",i,
2167 dev->alt_max_pkt_size[i]);
2168 }
2169
2170 if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
2171 dev->model = card[nr];
2172
2173 /* allocate device struct */
2174 retval = em28xx_init_dev(&dev, udev, nr);
2175 if (retval)
2176 return retval;
2177
2178 em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
2179
2180 /* save our data pointer in this interface device */
2181 usb_set_intfdata(interface, dev);
2182
2183 request_modules(dev);
2184
2185 return 0;
2186 }
2187
2188 /*
2189 * em28xx_usb_disconnect()
2190 * called when the device gets diconencted
2191 * video device will be unregistered on v4l2_close in case it is still open
2192 */
2193 static void em28xx_usb_disconnect(struct usb_interface *interface)
2194 {
2195 struct em28xx *dev;
2196 struct em28xx_ops *ops = NULL;
2197
2198 dev = usb_get_intfdata(interface);
2199 usb_set_intfdata(interface, NULL);
2200
2201 if (!dev)
2202 return;
2203
2204 em28xx_info("disconnecting %s\n", dev->vdev->name);
2205
2206 /* wait until all current v4l2 io is finished then deallocate resources */
2207 mutex_lock(&dev->lock);
2208
2209 wake_up_interruptible_all(&dev->open);
2210
2211 if (dev->users) {
2212 em28xx_warn
2213 ("device /dev/video%d is open! Deregistration and memory "
2214 "deallocation are deferred on close.\n",
2215 dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
2216
2217 dev->state |= DEV_MISCONFIGURED;
2218 em28xx_uninit_isoc(dev);
2219 dev->state |= DEV_DISCONNECTED;
2220 wake_up_interruptible(&dev->wait_frame);
2221 wake_up_interruptible(&dev->wait_stream);
2222 } else {
2223 dev->state |= DEV_DISCONNECTED;
2224 em28xx_release_resources(dev);
2225 }
2226 mutex_unlock(&dev->lock);
2227
2228 mutex_lock(&em28xx_extension_devlist_lock);
2229 if (!list_empty(&em28xx_extension_devlist)) {
2230 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
2231 ops->fini(dev);
2232 }
2233 }
2234 mutex_unlock(&em28xx_extension_devlist_lock);
2235
2236 if (!dev->users) {
2237 kfree(dev->alt_max_pkt_size);
2238 kfree(dev);
2239 }
2240 }
2241
2242 static struct usb_driver em28xx_usb_driver = {
2243 .name = "em28xx",
2244 .probe = em28xx_usb_probe,
2245 .disconnect = em28xx_usb_disconnect,
2246 .id_table = em28xx_id_table,
2247 };
2248
2249 static int __init em28xx_module_init(void)
2250 {
2251 int result;
2252
2253 printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
2254 (EM28XX_VERSION_CODE >> 16) & 0xff,
2255 (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
2256 #ifdef SNAPSHOT
2257 printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
2258 SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
2259 #endif
2260
2261 /* register this driver with the USB subsystem */
2262 result = usb_register(&em28xx_usb_driver);
2263 if (result)
2264 em28xx_err(DRIVER_NAME
2265 " usb_register failed. Error number %d.\n", result);
2266
2267 return result;
2268 }
2269
2270 static void __exit em28xx_module_exit(void)
2271 {
2272 /* deregister this driver with the USB subsystem */
2273 usb_deregister(&em28xx_usb_driver);
2274 }
2275
2276 module_init(em28xx_module_init);
2277 module_exit(em28xx_module_exit);
Linux kernel - Deliverables
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