2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
5 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
6 Markus Rechberger <mrechberger@gmail.com>
7 Mauro Carvalho Chehab <mchehab@infradead.org>
8 Sascha Sommer <saschasommer@freenet.de>
10 Some parts based on SN9C10x PC Camera Controllers GPL driver made
11 by Luca Risolia <luca.risolia@studio.unibo.it>
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <linux/init.h>
29 #include <linux/list.h>
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/bitmap.h>
33 #include <linux/usb.h>
34 #include <linux/i2c.h>
35 #include <linux/version.h>
37 #include <linux/mutex.h>
40 #include <media/v4l2-common.h>
41 #include <media/msp3400.h>
42 #include <media/tuner.h>
44 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
45 "Markus Rechberger <mrechberger@gmail.com>, " \
46 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
47 "Sascha Sommer <saschasommer@freenet.de>"
49 #define DRIVER_NAME "em28xx"
50 #define DRIVER_DESC "Empia em28xx based USB video device driver"
51 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
53 #define em28xx_videodbg(fmt, arg...) do {\
55 printk(KERN_INFO "%s %s :"fmt, \
56 dev->name, __func__ , ##arg); } while (0)
58 static unsigned int isoc_debug
;
59 module_param(isoc_debug
, int, 0644);
60 MODULE_PARM_DESC(isoc_debug
, "enable debug messages [isoc transfers]");
62 #define em28xx_isocdbg(fmt, arg...) \
65 printk(KERN_INFO "%s %s :"fmt, \
66 dev->name, __func__ , ##arg); \
70 MODULE_AUTHOR(DRIVER_AUTHOR
);
71 MODULE_DESCRIPTION(DRIVER_DESC
);
72 MODULE_LICENSE("GPL");
74 static LIST_HEAD(em28xx_devlist
);
76 static unsigned int card
[] = {[0 ... (EM28XX_MAXBOARDS
- 1)] = UNSET
};
77 static unsigned int video_nr
[] = {[0 ... (EM28XX_MAXBOARDS
- 1)] = UNSET
};
78 static unsigned int vbi_nr
[] = {[0 ... (EM28XX_MAXBOARDS
- 1)] = UNSET
};
79 static unsigned int radio_nr
[] = {[0 ... (EM28XX_MAXBOARDS
- 1)] = UNSET
};
81 module_param_array(card
, int, NULL
, 0444);
82 module_param_array(video_nr
, int, NULL
, 0444);
83 module_param_array(vbi_nr
, int, NULL
, 0444);
84 module_param_array(radio_nr
, int, NULL
, 0444);
85 MODULE_PARM_DESC(card
, "card type");
86 MODULE_PARM_DESC(video_nr
, "video device numbers");
87 MODULE_PARM_DESC(vbi_nr
, "vbi device numbers");
88 MODULE_PARM_DESC(radio_nr
, "radio device numbers");
90 static unsigned int video_debug
;
91 module_param(video_debug
, int, 0644);
92 MODULE_PARM_DESC(video_debug
, "enable debug messages [video]");
94 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
95 static unsigned long em28xx_devused
;
97 /* supported controls */
98 /* Common to all boards */
99 static struct v4l2_queryctrl em28xx_qctrl
[] = {
101 .id
= V4L2_CID_AUDIO_VOLUME
,
102 .type
= V4L2_CTRL_TYPE_INTEGER
,
107 .default_value
= 0x1f,
110 .id
= V4L2_CID_AUDIO_MUTE
,
111 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
121 static struct usb_driver em28xx_usb_driver
;
123 /* ------------------------------------------------------------------
124 DMA and thread functions
125 ------------------------------------------------------------------*/
128 * Announces that a buffer were filled and request the next
130 static inline void buffer_filled(struct em28xx
*dev
,
131 struct em28xx_dmaqueue
*dma_q
,
132 struct em28xx_buffer
*buf
)
134 /* Advice that buffer was filled */
135 em28xx_isocdbg("[%p/%d] wakeup\n", buf
, buf
->vb
.i
);
136 buf
->vb
.state
= VIDEOBUF_DONE
;
137 buf
->vb
.field_count
++;
138 do_gettimeofday(&buf
->vb
.ts
);
140 dev
->isoc_ctl
.buf
= NULL
;
142 list_del(&buf
->vb
.queue
);
143 wake_up(&buf
->vb
.done
);
147 * Identify the buffer header type and properly handles
149 static void em28xx_copy_video(struct em28xx
*dev
,
150 struct em28xx_dmaqueue
*dma_q
,
151 struct em28xx_buffer
*buf
,
153 unsigned char *outp
, unsigned long len
)
155 void *fieldstart
, *startwrite
, *startread
;
156 int linesdone
, currlinedone
, offset
, lencopy
, remain
;
157 int bytesperline
= dev
->width
<< 1;
159 if (dma_q
->pos
+ len
> buf
->vb
.size
)
160 len
= buf
->vb
.size
- dma_q
->pos
;
162 if (p
[0] != 0x88 && p
[0] != 0x22) {
163 em28xx_isocdbg("frame is not complete\n");
171 /* Interlaces frame */
175 fieldstart
= outp
+ bytesperline
;
177 linesdone
= dma_q
->pos
/ bytesperline
;
178 currlinedone
= dma_q
->pos
% bytesperline
;
179 offset
= linesdone
* bytesperline
* 2 + currlinedone
;
180 startwrite
= fieldstart
+ offset
;
181 lencopy
= bytesperline
- currlinedone
;
182 lencopy
= lencopy
> remain
? remain
: lencopy
;
184 if ((char *)startwrite
+ lencopy
> (char *)outp
+ buf
->vb
.size
) {
185 em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
186 ((char *)startwrite
+ lencopy
) -
187 ((char *)outp
+ buf
->vb
.size
));
188 lencopy
= remain
= (char *)outp
+ buf
->vb
.size
- (char *)startwrite
;
192 memcpy(startwrite
, startread
, lencopy
);
197 startwrite
+= lencopy
+ bytesperline
;
198 startread
+= lencopy
;
199 if (bytesperline
> remain
)
202 lencopy
= bytesperline
;
204 if ((char *)startwrite
+ lencopy
> (char *)outp
+ buf
->vb
.size
) {
205 em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
206 ((char *)startwrite
+ lencopy
) -
207 ((char *)outp
+ buf
->vb
.size
));
208 lencopy
= remain
= (char *)outp
+ buf
->vb
.size
-
214 memcpy(startwrite
, startread
, lencopy
);
222 static inline void print_err_status(struct em28xx
*dev
,
223 int packet
, int status
)
225 char *errmsg
= "Unknown";
229 errmsg
= "unlinked synchronuously";
232 errmsg
= "unlinked asynchronuously";
235 errmsg
= "Buffer error (overrun)";
238 errmsg
= "Stalled (device not responding)";
241 errmsg
= "Babble (bad cable?)";
244 errmsg
= "Bit-stuff error (bad cable?)";
247 errmsg
= "CRC/Timeout (could be anything)";
250 errmsg
= "Device does not respond";
254 em28xx_isocdbg("URB status %d [%s].\n", status
, errmsg
);
256 em28xx_isocdbg("URB packet %d, status %d [%s].\n",
257 packet
, status
, errmsg
);
262 * video-buf generic routine to get the next available buffer
264 static inline void get_next_buf(struct em28xx_dmaqueue
*dma_q
,
265 struct em28xx_buffer
**buf
)
267 struct em28xx
*dev
= container_of(dma_q
, struct em28xx
, vidq
);
270 if (list_empty(&dma_q
->active
)) {
271 em28xx_isocdbg("No active queue to serve\n");
272 dev
->isoc_ctl
.buf
= NULL
;
277 /* Get the next buffer */
278 *buf
= list_entry(dma_q
->active
.next
, struct em28xx_buffer
, vb
.queue
);
280 /* Cleans up buffer - Usefull for testing for frame/URB loss */
281 outp
= videobuf_to_vmalloc(&(*buf
)->vb
);
282 memset(outp
, 0, (*buf
)->vb
.size
);
284 dev
->isoc_ctl
.buf
= *buf
;
290 * Controls the isoc copy of each urb packet
292 static inline int em28xx_isoc_copy(struct em28xx
*dev
, struct urb
*urb
)
294 struct em28xx_buffer
*buf
;
295 struct em28xx_dmaqueue
*dma_q
= urb
->context
;
296 unsigned char *outp
= NULL
;
297 int i
, len
= 0, rc
= 1;
303 if ((dev
->state
& DEV_DISCONNECTED
) || (dev
->state
& DEV_MISCONFIGURED
))
306 if (urb
->status
< 0) {
307 print_err_status(dev
, -1, urb
->status
);
308 if (urb
->status
== -ENOENT
)
312 buf
= dev
->isoc_ctl
.buf
;
314 outp
= videobuf_to_vmalloc(&buf
->vb
);
316 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
317 int status
= urb
->iso_frame_desc
[i
].status
;
320 print_err_status(dev
, i
, status
);
321 if (urb
->iso_frame_desc
[i
].status
!= -EPROTO
)
325 len
= urb
->iso_frame_desc
[i
].actual_length
- 4;
327 if (urb
->iso_frame_desc
[i
].actual_length
<= 0) {
328 /* em28xx_isocdbg("packet %d is empty",i); - spammy */
331 if (urb
->iso_frame_desc
[i
].actual_length
>
333 em28xx_isocdbg("packet bigger than packet size");
337 p
= urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
;
339 /* FIXME: incomplete buffer checks where removed to make
340 logic simpler. Impacts of those changes should be evaluated
342 if (p
[0] == 0x33 && p
[1] == 0x95 && p
[2] == 0x00) {
343 em28xx_isocdbg("VBI HEADER!!!\n");
344 /* FIXME: Should add vbi copy */
347 if (p
[0] == 0x22 && p
[1] == 0x5a) {
348 em28xx_isocdbg("Video frame %d, length=%i, %s\n", p
[2],
349 len
, (p
[2] & 1)? "odd" : "even");
353 buffer_filled(dev
, dma_q
, buf
);
354 get_next_buf(dma_q
, &buf
);
358 outp
= videobuf_to_vmalloc(&buf
->vb
);
371 em28xx_copy_video(dev
, dma_q
, buf
, p
, outp
, len
);
376 /* ------------------------------------------------------------------
378 ------------------------------------------------------------------*/
381 buffer_setup(struct videobuf_queue
*vq
, unsigned int *count
, unsigned int *size
)
383 struct em28xx_fh
*fh
= vq
->priv_data
;
384 struct em28xx
*dev
= fh
->dev
;
385 struct v4l2_frequency f
;
387 *size
= 16 * fh
->dev
->width
* fh
->dev
->height
>> 3;
389 *count
= EM28XX_DEF_BUF
;
391 if (*count
< EM28XX_MIN_BUF
)
392 *count
= EM28XX_MIN_BUF
;
394 dev
->mode
= EM28XX_ANALOG_MODE
;
396 /* Ask tuner to go to analog mode */
397 memset(&f
, 0, sizeof(f
));
398 f
.frequency
= dev
->ctl_freq
;
400 em28xx_i2c_call_clients(dev
, VIDIOC_S_FREQUENCY
, &f
);
405 /* This is called *without* dev->slock held; please keep it that way */
406 static void free_buffer(struct videobuf_queue
*vq
, struct em28xx_buffer
*buf
)
408 struct em28xx_fh
*fh
= vq
->priv_data
;
409 struct em28xx
*dev
= fh
->dev
;
410 unsigned long flags
= 0;
414 /* We used to wait for the buffer to finish here, but this didn't work
415 because, as we were keeping the state as VIDEOBUF_QUEUED,
416 videobuf_queue_cancel marked it as finished for us.
417 (Also, it could wedge forever if the hardware was misconfigured.)
419 This should be safe; by the time we get here, the buffer isn't
420 queued anymore. If we ever start marking the buffers as
421 VIDEOBUF_ACTIVE, it won't be, though.
423 spin_lock_irqsave(&dev
->slock
, flags
);
424 if (dev
->isoc_ctl
.buf
== buf
)
425 dev
->isoc_ctl
.buf
= NULL
;
426 spin_unlock_irqrestore(&dev
->slock
, flags
);
428 videobuf_vmalloc_free(&buf
->vb
);
429 buf
->vb
.state
= VIDEOBUF_NEEDS_INIT
;
433 buffer_prepare(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
,
434 enum v4l2_field field
)
436 struct em28xx_fh
*fh
= vq
->priv_data
;
437 struct em28xx_buffer
*buf
= container_of(vb
, struct em28xx_buffer
, vb
);
438 struct em28xx
*dev
= fh
->dev
;
439 int rc
= 0, urb_init
= 0;
441 /* FIXME: It assumes depth = 16 */
442 /* The only currently supported format is 16 bits/pixel */
443 buf
->vb
.size
= 16 * dev
->width
* dev
->height
>> 3;
445 if (0 != buf
->vb
.baddr
&& buf
->vb
.bsize
< buf
->vb
.size
)
448 buf
->vb
.width
= dev
->width
;
449 buf
->vb
.height
= dev
->height
;
450 buf
->vb
.field
= field
;
452 if (VIDEOBUF_NEEDS_INIT
== buf
->vb
.state
) {
453 rc
= videobuf_iolock(vq
, &buf
->vb
, NULL
);
458 if (!dev
->isoc_ctl
.num_bufs
)
462 rc
= em28xx_init_isoc(dev
, EM28XX_NUM_PACKETS
,
463 EM28XX_NUM_BUFS
, dev
->max_pkt_size
,
464 em28xx_isoc_copy
, EM28XX_ANALOG_CAPTURE
);
469 buf
->vb
.state
= VIDEOBUF_PREPARED
;
473 free_buffer(vq
, buf
);
478 buffer_queue(struct videobuf_queue
*vq
, struct videobuf_buffer
*vb
)
480 struct em28xx_buffer
*buf
= container_of(vb
, struct em28xx_buffer
, vb
);
481 struct em28xx_fh
*fh
= vq
->priv_data
;
482 struct em28xx
*dev
= fh
->dev
;
483 struct em28xx_dmaqueue
*vidq
= &dev
->vidq
;
485 buf
->vb
.state
= VIDEOBUF_QUEUED
;
486 list_add_tail(&buf
->vb
.queue
, &vidq
->active
);
490 static void buffer_release(struct videobuf_queue
*vq
,
491 struct videobuf_buffer
*vb
)
493 struct em28xx_buffer
*buf
= container_of(vb
, struct em28xx_buffer
, vb
);
494 struct em28xx_fh
*fh
= vq
->priv_data
;
495 struct em28xx
*dev
= (struct em28xx
*)fh
->dev
;
497 em28xx_isocdbg("em28xx: called buffer_release\n");
499 free_buffer(vq
, buf
);
502 static struct videobuf_queue_ops em28xx_video_qops
= {
503 .buf_setup
= buffer_setup
,
504 .buf_prepare
= buffer_prepare
,
505 .buf_queue
= buffer_queue
,
506 .buf_release
= buffer_release
,
509 /********************* v4l2 interface **************************************/
513 * inits registers with sane defaults
515 static int em28xx_config(struct em28xx
*dev
)
518 /* Sets I2C speed to 100 KHz */
520 em28xx_write_regs_req(dev
, 0x00, 0x06, "\x40", 1);
522 /* enable vbi capturing */
524 /* em28xx_write_regs_req(dev, 0x00, 0x0e, "\xC0", 1); audio register */
525 /* em28xx_write_regs_req(dev, 0x00, 0x0f, "\x80", 1); clk register */
526 em28xx_write_regs_req(dev
, 0x00, 0x11, "\x51", 1);
528 dev
->mute
= 1; /* maybe not the right place... */
531 em28xx_outfmt_set_yuv422(dev
);
532 em28xx_colorlevels_set_default(dev
);
533 em28xx_compression_disable(dev
);
539 * em28xx_config_i2c()
540 * configure i2c attached devices
542 static void em28xx_config_i2c(struct em28xx
*dev
)
544 struct v4l2_routing route
;
546 route
.input
= INPUT(dev
->ctl_input
)->vmux
;
548 em28xx_i2c_call_clients(dev
, VIDIOC_INT_RESET
, NULL
);
549 em28xx_i2c_call_clients(dev
, VIDIOC_INT_S_VIDEO_ROUTING
, &route
);
550 em28xx_i2c_call_clients(dev
, VIDIOC_STREAMON
, NULL
);
553 static void video_mux(struct em28xx
*dev
, int index
)
555 struct v4l2_routing route
;
557 route
.input
= INPUT(index
)->vmux
;
559 dev
->ctl_input
= index
;
560 dev
->ctl_ainput
= INPUT(index
)->amux
;
562 em28xx_i2c_call_clients(dev
, VIDIOC_INT_S_VIDEO_ROUTING
, &route
);
564 if (dev
->has_msp34xx
) {
565 if (dev
->i2s_speed
) {
566 em28xx_i2c_call_clients(dev
, VIDIOC_INT_I2S_CLOCK_FREQ
,
569 route
.input
= dev
->ctl_ainput
;
570 route
.output
= MSP_OUTPUT(MSP_SC_IN_DSP_SCART1
);
571 /* Note: this is msp3400 specific */
572 em28xx_i2c_call_clients(dev
, VIDIOC_INT_S_AUDIO_ROUTING
,
576 em28xx_audio_analog_set(dev
);
579 /* Usage lock check functions */
580 static int res_get(struct em28xx_fh
*fh
)
582 struct em28xx
*dev
= fh
->dev
;
585 /* This instance already has stream_on */
592 mutex_lock(&dev
->lock
);
595 mutex_unlock(&dev
->lock
);
599 static int res_check(struct em28xx_fh
*fh
)
601 return (fh
->stream_on
);
604 static void res_free(struct em28xx_fh
*fh
)
606 struct em28xx
*dev
= fh
->dev
;
608 mutex_lock(&dev
->lock
);
611 mutex_unlock(&dev
->lock
);
616 * return the current saturation, brightness or contrast, mute state
618 static int em28xx_get_ctrl(struct em28xx
*dev
, struct v4l2_control
*ctrl
)
621 case V4L2_CID_AUDIO_MUTE
:
622 ctrl
->value
= dev
->mute
;
624 case V4L2_CID_AUDIO_VOLUME
:
625 ctrl
->value
= dev
->volume
;
634 * mute or set new saturation, brightness or contrast
636 static int em28xx_set_ctrl(struct em28xx
*dev
, const struct v4l2_control
*ctrl
)
639 case V4L2_CID_AUDIO_MUTE
:
640 if (ctrl
->value
!= dev
->mute
) {
641 dev
->mute
= ctrl
->value
;
642 return em28xx_audio_analog_set(dev
);
645 case V4L2_CID_AUDIO_VOLUME
:
646 dev
->volume
= ctrl
->value
;
647 return em28xx_audio_analog_set(dev
);
653 static int check_dev(struct em28xx
*dev
)
655 if (dev
->state
& DEV_DISCONNECTED
) {
656 em28xx_errdev("v4l2 ioctl: device not present\n");
660 if (dev
->state
& DEV_MISCONFIGURED
) {
661 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
662 "close and open it again\n");
668 static void get_scale(struct em28xx
*dev
,
669 unsigned int width
, unsigned int height
,
670 unsigned int *hscale
, unsigned int *vscale
)
672 unsigned int maxw
= norm_maxw(dev
);
673 unsigned int maxh
= norm_maxh(dev
);
675 *hscale
= (((unsigned long)maxw
) << 12) / width
- 4096L;
676 if (*hscale
>= 0x4000)
679 *vscale
= (((unsigned long)maxh
) << 12) / height
- 4096L;
680 if (*vscale
>= 0x4000)
684 /* ------------------------------------------------------------------
685 IOCTL vidioc handling
686 ------------------------------------------------------------------*/
688 static int vidioc_g_fmt_cap(struct file
*file
, void *priv
,
689 struct v4l2_format
*f
)
691 struct em28xx_fh
*fh
= priv
;
692 struct em28xx
*dev
= fh
->dev
;
694 mutex_lock(&dev
->lock
);
696 f
->fmt
.pix
.width
= dev
->width
;
697 f
->fmt
.pix
.height
= dev
->height
;
698 f
->fmt
.pix
.pixelformat
= V4L2_PIX_FMT_YUYV
;
699 f
->fmt
.pix
.bytesperline
= dev
->width
* 2;
700 f
->fmt
.pix
.sizeimage
= f
->fmt
.pix
.bytesperline
* dev
->height
;
701 f
->fmt
.pix
.colorspace
= V4L2_COLORSPACE_SMPTE170M
;
703 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
704 f
->fmt
.pix
.field
= dev
->interlaced
?
705 V4L2_FIELD_INTERLACED
: V4L2_FIELD_TOP
;
707 mutex_unlock(&dev
->lock
);
711 static int vidioc_try_fmt_cap(struct file
*file
, void *priv
,
712 struct v4l2_format
*f
)
714 struct em28xx_fh
*fh
= priv
;
715 struct em28xx
*dev
= fh
->dev
;
716 int width
= f
->fmt
.pix
.width
;
717 int height
= f
->fmt
.pix
.height
;
718 unsigned int maxw
= norm_maxw(dev
);
719 unsigned int maxh
= norm_maxh(dev
);
720 unsigned int hscale
, vscale
;
722 /* width must even because of the YUYV format
723 height must be even because of interlacing */
736 mutex_lock(&dev
->lock
);
738 if (dev
->is_em2800
) {
739 /* the em2800 can only scale down to 50% */
740 if (height
% (maxh
/ 2))
742 if (width
% (maxw
/ 2))
744 /* according to empiatech support */
745 /* the MaxPacketSize is to small to support */
746 /* framesizes larger than 640x480 @ 30 fps */
747 /* or 640x576 @ 25 fps. As this would cut */
748 /* of a part of the image we prefer */
749 /* 360x576 or 360x480 for now */
750 if (width
== maxw
&& height
== maxh
)
754 get_scale(dev
, width
, height
, &hscale
, &vscale
);
756 width
= (((unsigned long)maxw
) << 12) / (hscale
+ 4096L);
757 height
= (((unsigned long)maxh
) << 12) / (vscale
+ 4096L);
759 f
->fmt
.pix
.width
= width
;
760 f
->fmt
.pix
.height
= height
;
761 f
->fmt
.pix
.pixelformat
= V4L2_PIX_FMT_YUYV
;
762 f
->fmt
.pix
.bytesperline
= width
* 2;
763 f
->fmt
.pix
.sizeimage
= width
* 2 * height
;
764 f
->fmt
.pix
.colorspace
= V4L2_COLORSPACE_SMPTE170M
;
765 f
->fmt
.pix
.field
= V4L2_FIELD_INTERLACED
;
767 mutex_unlock(&dev
->lock
);
771 static int vidioc_s_fmt_cap(struct file
*file
, void *priv
,
772 struct v4l2_format
*f
)
774 struct em28xx_fh
*fh
= priv
;
775 struct em28xx
*dev
= fh
->dev
;
782 vidioc_try_fmt_cap(file
, priv
, f
);
784 mutex_lock(&dev
->lock
);
786 if (videobuf_queue_is_busy(&fh
->vb_vidq
)) {
787 em28xx_errdev("%s queue busy\n", __func__
);
792 if (dev
->stream_on
&& !fh
->stream_on
) {
793 em28xx_errdev("%s device in use by another fh\n", __func__
);
798 /* set new image size */
799 dev
->width
= f
->fmt
.pix
.width
;
800 dev
->height
= f
->fmt
.pix
.height
;
801 get_scale(dev
, dev
->width
, dev
->height
, &dev
->hscale
, &dev
->vscale
);
803 em28xx_set_alternate(dev
);
804 em28xx_resolution_set(dev
);
809 mutex_unlock(&dev
->lock
);
813 static int vidioc_s_std(struct file
*file
, void *priv
, v4l2_std_id
* norm
)
815 struct em28xx_fh
*fh
= priv
;
816 struct em28xx
*dev
= fh
->dev
;
817 struct v4l2_format f
;
824 mutex_lock(&dev
->lock
);
826 mutex_unlock(&dev
->lock
);
828 /* Adjusts width/height, if needed */
829 f
.fmt
.pix
.width
= dev
->width
;
830 f
.fmt
.pix
.height
= dev
->height
;
831 vidioc_try_fmt_cap(file
, priv
, &f
);
833 mutex_lock(&dev
->lock
);
835 /* set new image size */
836 dev
->width
= f
.fmt
.pix
.width
;
837 dev
->height
= f
.fmt
.pix
.height
;
838 get_scale(dev
, dev
->width
, dev
->height
, &dev
->hscale
, &dev
->vscale
);
840 em28xx_resolution_set(dev
);
841 em28xx_i2c_call_clients(dev
, VIDIOC_S_STD
, &dev
->norm
);
843 mutex_unlock(&dev
->lock
);
847 static const char *iname
[] = {
848 [EM28XX_VMUX_COMPOSITE1
] = "Composite1",
849 [EM28XX_VMUX_COMPOSITE2
] = "Composite2",
850 [EM28XX_VMUX_COMPOSITE3
] = "Composite3",
851 [EM28XX_VMUX_COMPOSITE4
] = "Composite4",
852 [EM28XX_VMUX_SVIDEO
] = "S-Video",
853 [EM28XX_VMUX_TELEVISION
] = "Television",
854 [EM28XX_VMUX_CABLE
] = "Cable TV",
855 [EM28XX_VMUX_DVB
] = "DVB",
856 [EM28XX_VMUX_DEBUG
] = "for debug only",
859 static int vidioc_enum_input(struct file
*file
, void *priv
,
860 struct v4l2_input
*i
)
862 struct em28xx_fh
*fh
= priv
;
863 struct em28xx
*dev
= fh
->dev
;
867 if (n
>= MAX_EM28XX_INPUT
)
869 if (0 == INPUT(n
)->type
)
873 i
->type
= V4L2_INPUT_TYPE_CAMERA
;
875 strcpy(i
->name
, iname
[INPUT(n
)->type
]);
877 if ((EM28XX_VMUX_TELEVISION
== INPUT(n
)->type
) ||
878 (EM28XX_VMUX_CABLE
== INPUT(n
)->type
))
879 i
->type
= V4L2_INPUT_TYPE_TUNER
;
881 i
->std
= dev
->vdev
->tvnorms
;
886 static int vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
888 struct em28xx_fh
*fh
= priv
;
889 struct em28xx
*dev
= fh
->dev
;
896 static int vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
898 struct em28xx_fh
*fh
= priv
;
899 struct em28xx
*dev
= fh
->dev
;
906 if (i
>= MAX_EM28XX_INPUT
)
908 if (0 == INPUT(i
)->type
)
911 mutex_lock(&dev
->lock
);
915 mutex_unlock(&dev
->lock
);
919 static int vidioc_g_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
921 struct em28xx_fh
*fh
= priv
;
922 struct em28xx
*dev
= fh
->dev
;
923 unsigned int index
= a
->index
;
928 index
= dev
->ctl_ainput
;
931 strcpy(a
->name
, "Television");
933 strcpy(a
->name
, "Line In");
935 a
->capability
= V4L2_AUDCAP_STEREO
;
941 static int vidioc_s_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
943 struct em28xx_fh
*fh
= priv
;
944 struct em28xx
*dev
= fh
->dev
;
946 if (a
->index
!= dev
->ctl_ainput
)
952 static int vidioc_queryctrl(struct file
*file
, void *priv
,
953 struct v4l2_queryctrl
*qc
)
955 struct em28xx_fh
*fh
= priv
;
956 struct em28xx
*dev
= fh
->dev
;
965 memset(qc
, 0, sizeof(*qc
));
969 if (!dev
->has_msp34xx
) {
970 for (i
= 0; i
< ARRAY_SIZE(em28xx_qctrl
); i
++) {
971 if (qc
->id
&& qc
->id
== em28xx_qctrl
[i
].id
) {
972 memcpy(qc
, &(em28xx_qctrl
[i
]), sizeof(*qc
));
977 mutex_lock(&dev
->lock
);
978 em28xx_i2c_call_clients(dev
, VIDIOC_QUERYCTRL
, qc
);
979 mutex_unlock(&dev
->lock
);
987 static int vidioc_g_ctrl(struct file
*file
, void *priv
,
988 struct v4l2_control
*ctrl
)
990 struct em28xx_fh
*fh
= priv
;
991 struct em28xx
*dev
= fh
->dev
;
997 mutex_lock(&dev
->lock
);
999 if (!dev
->has_msp34xx
)
1000 rc
= em28xx_get_ctrl(dev
, ctrl
);
1004 if (rc
== -EINVAL
) {
1005 em28xx_i2c_call_clients(dev
, VIDIOC_G_CTRL
, ctrl
);
1009 mutex_unlock(&dev
->lock
);
1013 static int vidioc_s_ctrl(struct file
*file
, void *priv
,
1014 struct v4l2_control
*ctrl
)
1016 struct em28xx_fh
*fh
= priv
;
1017 struct em28xx
*dev
= fh
->dev
;
1021 rc
= check_dev(dev
);
1025 mutex_lock(&dev
->lock
);
1027 if (dev
->has_msp34xx
)
1028 em28xx_i2c_call_clients(dev
, VIDIOC_S_CTRL
, ctrl
);
1031 for (i
= 0; i
< ARRAY_SIZE(em28xx_qctrl
); i
++) {
1032 if (ctrl
->id
== em28xx_qctrl
[i
].id
) {
1033 if (ctrl
->value
< em28xx_qctrl
[i
].minimum
||
1034 ctrl
->value
> em28xx_qctrl
[i
].maximum
) {
1039 rc
= em28xx_set_ctrl(dev
, ctrl
);
1045 /* Control not found - try to send it to the attached devices */
1047 em28xx_i2c_call_clients(dev
, VIDIOC_S_CTRL
, ctrl
);
1051 mutex_unlock(&dev
->lock
);
1055 static int vidioc_g_tuner(struct file
*file
, void *priv
,
1056 struct v4l2_tuner
*t
)
1058 struct em28xx_fh
*fh
= priv
;
1059 struct em28xx
*dev
= fh
->dev
;
1062 rc
= check_dev(dev
);
1069 strcpy(t
->name
, "Tuner");
1071 mutex_lock(&dev
->lock
);
1073 em28xx_i2c_call_clients(dev
, VIDIOC_G_TUNER
, t
);
1075 mutex_unlock(&dev
->lock
);
1079 static int vidioc_s_tuner(struct file
*file
, void *priv
,
1080 struct v4l2_tuner
*t
)
1082 struct em28xx_fh
*fh
= priv
;
1083 struct em28xx
*dev
= fh
->dev
;
1086 rc
= check_dev(dev
);
1093 mutex_lock(&dev
->lock
);
1095 em28xx_i2c_call_clients(dev
, VIDIOC_S_TUNER
, t
);
1097 mutex_unlock(&dev
->lock
);
1101 static int vidioc_g_frequency(struct file
*file
, void *priv
,
1102 struct v4l2_frequency
*f
)
1104 struct em28xx_fh
*fh
= priv
;
1105 struct em28xx
*dev
= fh
->dev
;
1107 f
->type
= fh
->radio
? V4L2_TUNER_RADIO
: V4L2_TUNER_ANALOG_TV
;
1108 f
->frequency
= dev
->ctl_freq
;
1113 static int vidioc_s_frequency(struct file
*file
, void *priv
,
1114 struct v4l2_frequency
*f
)
1116 struct em28xx_fh
*fh
= priv
;
1117 struct em28xx
*dev
= fh
->dev
;
1120 rc
= check_dev(dev
);
1127 if (unlikely(0 == fh
->radio
&& f
->type
!= V4L2_TUNER_ANALOG_TV
))
1129 if (unlikely(1 == fh
->radio
&& f
->type
!= V4L2_TUNER_RADIO
))
1132 mutex_lock(&dev
->lock
);
1134 dev
->ctl_freq
= f
->frequency
;
1135 em28xx_i2c_call_clients(dev
, VIDIOC_S_FREQUENCY
, f
);
1137 mutex_unlock(&dev
->lock
);
1141 #ifdef CONFIG_VIDEO_ADV_DEBUG
1142 static int em28xx_reg_len(int reg
)
1154 static int vidioc_g_register(struct file
*file
, void *priv
,
1155 struct v4l2_register
*reg
)
1157 struct em28xx_fh
*fh
= priv
;
1158 struct em28xx
*dev
= fh
->dev
;
1161 if (!v4l2_chip_match_host(reg
->match_type
, reg
->match_chip
))
1164 if (em28xx_reg_len(reg
->reg
) == 1) {
1165 ret
= em28xx_read_reg(dev
, reg
->reg
);
1172 ret
= em28xx_read_reg_req_len(dev
, USB_REQ_GET_STATUS
,
1173 reg
->reg
, (char *)&val
, 2);
1177 reg
->val
= cpu_to_le64((__u64
)val
);
1183 static int vidioc_s_register(struct file
*file
, void *priv
,
1184 struct v4l2_register
*reg
)
1186 struct em28xx_fh
*fh
= priv
;
1187 struct em28xx
*dev
= fh
->dev
;
1190 buf
= le64_to_cpu((__u64
)reg
->val
);
1192 return em28xx_write_regs(dev
, reg
->reg
, (char *)&buf
,
1193 em28xx_reg_len(reg
->reg
));
1198 static int vidioc_cropcap(struct file
*file
, void *priv
,
1199 struct v4l2_cropcap
*cc
)
1201 struct em28xx_fh
*fh
= priv
;
1202 struct em28xx
*dev
= fh
->dev
;
1204 if (cc
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1207 cc
->bounds
.left
= 0;
1209 cc
->bounds
.width
= dev
->width
;
1210 cc
->bounds
.height
= dev
->height
;
1211 cc
->defrect
= cc
->bounds
;
1212 cc
->pixelaspect
.numerator
= 54; /* 4:3 FIXME: remove magic numbers */
1213 cc
->pixelaspect
.denominator
= 59;
1218 static int vidioc_streamon(struct file
*file
, void *priv
,
1219 enum v4l2_buf_type type
)
1221 struct em28xx_fh
*fh
= priv
;
1222 struct em28xx
*dev
= fh
->dev
;
1225 rc
= check_dev(dev
);
1230 if (unlikely(res_get(fh
) < 0))
1233 return (videobuf_streamon(&fh
->vb_vidq
));
1236 static int vidioc_streamoff(struct file
*file
, void *priv
,
1237 enum v4l2_buf_type type
)
1239 struct em28xx_fh
*fh
= priv
;
1240 struct em28xx
*dev
= fh
->dev
;
1243 rc
= check_dev(dev
);
1247 if (fh
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1249 if (type
!= fh
->type
)
1252 videobuf_streamoff(&fh
->vb_vidq
);
1258 static int vidioc_querycap(struct file
*file
, void *priv
,
1259 struct v4l2_capability
*cap
)
1261 struct em28xx_fh
*fh
= priv
;
1262 struct em28xx
*dev
= fh
->dev
;
1264 strlcpy(cap
->driver
, "em28xx", sizeof(cap
->driver
));
1265 strlcpy(cap
->card
, em28xx_boards
[dev
->model
].name
, sizeof(cap
->card
));
1266 strlcpy(cap
->bus_info
, dev
->udev
->dev
.bus_id
, sizeof(cap
->bus_info
));
1268 cap
->version
= EM28XX_VERSION_CODE
;
1271 V4L2_CAP_SLICED_VBI_CAPTURE
|
1272 V4L2_CAP_VIDEO_CAPTURE
|
1274 V4L2_CAP_READWRITE
| V4L2_CAP_STREAMING
;
1276 if (dev
->tuner_type
!= TUNER_ABSENT
)
1277 cap
->capabilities
|= V4L2_CAP_TUNER
;
1282 static int vidioc_enum_fmt_cap(struct file
*file
, void *priv
,
1283 struct v4l2_fmtdesc
*fmtd
)
1285 if (fmtd
->index
!= 0)
1288 fmtd
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1289 strcpy(fmtd
->description
, "Packed YUY2");
1290 fmtd
->pixelformat
= V4L2_PIX_FMT_YUYV
;
1291 memset(fmtd
->reserved
, 0, sizeof(fmtd
->reserved
));
1296 /* Sliced VBI ioctls */
1297 static int vidioc_g_fmt_vbi_capture(struct file
*file
, void *priv
,
1298 struct v4l2_format
*f
)
1300 struct em28xx_fh
*fh
= priv
;
1301 struct em28xx
*dev
= fh
->dev
;
1304 rc
= check_dev(dev
);
1308 mutex_lock(&dev
->lock
);
1310 f
->fmt
.sliced
.service_set
= 0;
1312 em28xx_i2c_call_clients(dev
, VIDIOC_G_FMT
, f
);
1314 if (f
->fmt
.sliced
.service_set
== 0)
1317 mutex_unlock(&dev
->lock
);
1321 static int vidioc_try_set_vbi_capture(struct file
*file
, void *priv
,
1322 struct v4l2_format
*f
)
1324 struct em28xx_fh
*fh
= priv
;
1325 struct em28xx
*dev
= fh
->dev
;
1328 rc
= check_dev(dev
);
1332 mutex_lock(&dev
->lock
);
1333 em28xx_i2c_call_clients(dev
, VIDIOC_G_FMT
, f
);
1334 mutex_unlock(&dev
->lock
);
1336 if (f
->fmt
.sliced
.service_set
== 0)
1343 static int vidioc_reqbufs(struct file
*file
, void *priv
,
1344 struct v4l2_requestbuffers
*rb
)
1346 struct em28xx_fh
*fh
= priv
;
1347 struct em28xx
*dev
= fh
->dev
;
1350 rc
= check_dev(dev
);
1354 return (videobuf_reqbufs(&fh
->vb_vidq
, rb
));
1357 static int vidioc_querybuf(struct file
*file
, void *priv
,
1358 struct v4l2_buffer
*b
)
1360 struct em28xx_fh
*fh
= priv
;
1361 struct em28xx
*dev
= fh
->dev
;
1364 rc
= check_dev(dev
);
1368 return (videobuf_querybuf(&fh
->vb_vidq
, b
));
1371 static int vidioc_qbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*b
)
1373 struct em28xx_fh
*fh
= priv
;
1374 struct em28xx
*dev
= fh
->dev
;
1377 rc
= check_dev(dev
);
1381 return (videobuf_qbuf(&fh
->vb_vidq
, b
));
1384 static int vidioc_dqbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*b
)
1386 struct em28xx_fh
*fh
= priv
;
1387 struct em28xx
*dev
= fh
->dev
;
1390 rc
= check_dev(dev
);
1394 return (videobuf_dqbuf(&fh
->vb_vidq
, b
,
1395 file
->f_flags
& O_NONBLOCK
));
1398 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1399 static int vidiocgmbuf(struct file
*file
, void *priv
, struct video_mbuf
*mbuf
)
1401 struct em28xx_fh
*fh
= priv
;
1403 return videobuf_cgmbuf(&fh
->vb_vidq
, mbuf
, 8);
1408 /* ----------------------------------------------------------- */
1409 /* RADIO ESPECIFIC IOCTLS */
1410 /* ----------------------------------------------------------- */
1412 static int radio_querycap(struct file
*file
, void *priv
,
1413 struct v4l2_capability
*cap
)
1415 struct em28xx
*dev
= ((struct em28xx_fh
*)priv
)->dev
;
1417 strlcpy(cap
->driver
, "em28xx", sizeof(cap
->driver
));
1418 strlcpy(cap
->card
, em28xx_boards
[dev
->model
].name
, sizeof(cap
->card
));
1419 strlcpy(cap
->bus_info
, dev
->udev
->dev
.bus_id
, sizeof(cap
->bus_info
));
1421 cap
->version
= EM28XX_VERSION_CODE
;
1422 cap
->capabilities
= V4L2_CAP_TUNER
;
1426 static int radio_g_tuner(struct file
*file
, void *priv
,
1427 struct v4l2_tuner
*t
)
1429 struct em28xx
*dev
= ((struct em28xx_fh
*)priv
)->dev
;
1431 if (unlikely(t
->index
> 0))
1434 strcpy(t
->name
, "Radio");
1435 t
->type
= V4L2_TUNER_RADIO
;
1437 em28xx_i2c_call_clients(dev
, VIDIOC_G_TUNER
, t
);
1441 static int radio_enum_input(struct file
*file
, void *priv
,
1442 struct v4l2_input
*i
)
1446 strcpy(i
->name
, "Radio");
1447 i
->type
= V4L2_INPUT_TYPE_TUNER
;
1452 static int radio_g_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
1454 if (unlikely(a
->index
))
1457 strcpy(a
->name
, "Radio");
1461 static int radio_s_tuner(struct file
*file
, void *priv
,
1462 struct v4l2_tuner
*t
)
1464 struct em28xx
*dev
= ((struct em28xx_fh
*)priv
)->dev
;
1469 em28xx_i2c_call_clients(dev
, VIDIOC_S_TUNER
, t
);
1474 static int radio_s_audio(struct file
*file
, void *fh
,
1475 struct v4l2_audio
*a
)
1480 static int radio_s_input(struct file
*file
, void *fh
, unsigned int i
)
1485 static int radio_queryctrl(struct file
*file
, void *priv
,
1486 struct v4l2_queryctrl
*qc
)
1490 if (qc
->id
< V4L2_CID_BASE
||
1491 qc
->id
>= V4L2_CID_LASTP1
)
1494 for (i
= 0; i
< ARRAY_SIZE(em28xx_qctrl
); i
++) {
1495 if (qc
->id
&& qc
->id
== em28xx_qctrl
[i
].id
) {
1496 memcpy(qc
, &(em28xx_qctrl
[i
]), sizeof(*qc
));
1505 * em28xx_v4l2_open()
1506 * inits the device and starts isoc transfer
1508 static int em28xx_v4l2_open(struct inode
*inode
, struct file
*filp
)
1510 int minor
= iminor(inode
);
1511 int errCode
= 0, radio
= 0;
1512 struct em28xx
*h
, *dev
= NULL
;
1513 struct em28xx_fh
*fh
;
1514 enum v4l2_buf_type fh_type
= 0;
1516 list_for_each_entry(h
, &em28xx_devlist
, devlist
) {
1517 if (h
->vdev
->minor
== minor
) {
1519 fh_type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1521 if (h
->vbi_dev
->minor
== minor
) {
1523 fh_type
= V4L2_BUF_TYPE_VBI_CAPTURE
;
1526 h
->radio_dev
->minor
== minor
) {
1534 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1535 minor
, v4l2_type_names
[fh_type
], dev
->users
);
1537 fh
= kzalloc(sizeof(struct em28xx_fh
), GFP_KERNEL
);
1540 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1543 mutex_lock(&dev
->lock
);
1547 filp
->private_data
= fh
;
1549 if (fh
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
&& dev
->users
== 0) {
1550 dev
->width
= norm_maxw(dev
);
1551 dev
->height
= norm_maxh(dev
);
1555 em28xx_set_alternate(dev
);
1556 em28xx_resolution_set(dev
);
1560 em28xx_videodbg("video_open: setting radio device\n");
1561 em28xx_i2c_call_clients(dev
, AUDC_SET_RADIO
, NULL
);
1566 videobuf_queue_vmalloc_init(&fh
->vb_vidq
, &em28xx_video_qops
,
1567 NULL
, &dev
->slock
, fh
->type
, V4L2_FIELD_INTERLACED
,
1568 sizeof(struct em28xx_buffer
), fh
);
1570 mutex_unlock(&dev
->lock
);
1575 * em28xx_realease_resources()
1576 * unregisters the v4l2,i2c and usb devices
1577 * called when the device gets disconected or at module unload
1579 static void em28xx_release_resources(struct em28xx
*dev
)
1582 /*FIXME: I2C IR should be disconnected */
1584 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1585 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
,
1586 dev
->vbi_dev
->minor
-MINOR_VFL_TYPE_VBI_MIN
);
1587 list_del(&dev
->devlist
);
1588 if (dev
->radio_dev
) {
1589 if (-1 != dev
->radio_dev
->minor
)
1590 video_unregister_device(dev
->radio_dev
);
1592 video_device_release(dev
->radio_dev
);
1593 dev
->radio_dev
= NULL
;
1596 if (-1 != dev
->vbi_dev
->minor
)
1597 video_unregister_device(dev
->vbi_dev
);
1599 video_device_release(dev
->vbi_dev
);
1600 dev
->vbi_dev
= NULL
;
1603 if (-1 != dev
->vdev
->minor
)
1604 video_unregister_device(dev
->vdev
);
1606 video_device_release(dev
->vdev
);
1609 em28xx_i2c_unregister(dev
);
1610 usb_put_dev(dev
->udev
);
1612 /* Mark device as unused */
1613 em28xx_devused
&= ~(1<<dev
->devno
);
1617 * em28xx_v4l2_close()
1618 * stops streaming and deallocates all resources allocated by the v4l2
1621 static int em28xx_v4l2_close(struct inode
*inode
, struct file
*filp
)
1623 struct em28xx_fh
*fh
= filp
->private_data
;
1624 struct em28xx
*dev
= fh
->dev
;
1627 em28xx_videodbg("users=%d\n", dev
->users
);
1633 mutex_lock(&dev
->lock
);
1635 if (dev
->users
== 1) {
1636 videobuf_stop(&fh
->vb_vidq
);
1637 videobuf_mmap_free(&fh
->vb_vidq
);
1639 /* the device is already disconnect,
1640 free the remaining resources */
1641 if (dev
->state
& DEV_DISCONNECTED
) {
1642 em28xx_release_resources(dev
);
1643 mutex_unlock(&dev
->lock
);
1648 /* do this before setting alternate! */
1649 em28xx_uninit_isoc(dev
);
1651 /* set alternate 0 */
1653 em28xx_videodbg("setting alternate 0\n");
1654 errCode
= usb_set_interface(dev
->udev
, 0, 0);
1656 em28xx_errdev("cannot change alternate number to "
1657 "0 (error=%i)\n", errCode
);
1662 wake_up_interruptible_nr(&dev
->open
, 1);
1663 mutex_unlock(&dev
->lock
);
1668 * em28xx_v4l2_read()
1669 * will allocate buffers when called for the first time
1672 em28xx_v4l2_read(struct file
*filp
, char __user
*buf
, size_t count
,
1675 struct em28xx_fh
*fh
= filp
->private_data
;
1676 struct em28xx
*dev
= fh
->dev
;
1679 rc
= check_dev(dev
);
1683 /* FIXME: read() is not prepared to allow changing the video
1684 resolution while streaming. Seems a bug at em28xx_set_fmt
1687 if (fh
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
1688 if (unlikely(res_get(fh
)))
1691 return videobuf_read_stream(&fh
->vb_vidq
, buf
, count
, pos
, 0,
1692 filp
->f_flags
& O_NONBLOCK
);
1698 * em28xx_v4l2_poll()
1699 * will allocate buffers when called for the first time
1701 static unsigned int em28xx_v4l2_poll(struct file
*filp
, poll_table
* wait
)
1703 struct em28xx_fh
*fh
= filp
->private_data
;
1704 struct em28xx
*dev
= fh
->dev
;
1707 rc
= check_dev(dev
);
1711 if (unlikely(res_get(fh
) < 0))
1714 if (V4L2_BUF_TYPE_VIDEO_CAPTURE
!= fh
->type
)
1717 return videobuf_poll_stream(filp
, &fh
->vb_vidq
, wait
);
1721 * em28xx_v4l2_mmap()
1723 static int em28xx_v4l2_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
1725 struct em28xx_fh
*fh
= filp
->private_data
;
1726 struct em28xx
*dev
= fh
->dev
;
1729 if (unlikely(res_get(fh
) < 0))
1732 rc
= check_dev(dev
);
1736 rc
= videobuf_mmap_mapper(&fh
->vb_vidq
, vma
);
1738 em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
1739 (unsigned long)vma
->vm_start
,
1740 (unsigned long)vma
->vm_end
-(unsigned long)vma
->vm_start
,
1746 static const struct file_operations em28xx_v4l_fops
= {
1747 .owner
= THIS_MODULE
,
1748 .open
= em28xx_v4l2_open
,
1749 .release
= em28xx_v4l2_close
,
1750 .read
= em28xx_v4l2_read
,
1751 .poll
= em28xx_v4l2_poll
,
1752 .mmap
= em28xx_v4l2_mmap
,
1753 .ioctl
= video_ioctl2
,
1754 .llseek
= no_llseek
,
1755 .compat_ioctl
= v4l_compat_ioctl32
,
1758 static const struct file_operations radio_fops
= {
1759 .owner
= THIS_MODULE
,
1760 .open
= em28xx_v4l2_open
,
1761 .release
= em28xx_v4l2_close
,
1762 .ioctl
= video_ioctl2
,
1763 .compat_ioctl
= v4l_compat_ioctl32
,
1764 .llseek
= no_llseek
,
1767 static const struct video_device em28xx_video_template
= {
1768 .fops
= &em28xx_v4l_fops
,
1769 .release
= video_device_release
,
1772 .vidioc_querycap
= vidioc_querycap
,
1773 .vidioc_enum_fmt_cap
= vidioc_enum_fmt_cap
,
1774 .vidioc_g_fmt_cap
= vidioc_g_fmt_cap
,
1775 .vidioc_try_fmt_cap
= vidioc_try_fmt_cap
,
1776 .vidioc_s_fmt_cap
= vidioc_s_fmt_cap
,
1777 .vidioc_g_audio
= vidioc_g_audio
,
1778 .vidioc_s_audio
= vidioc_s_audio
,
1779 .vidioc_cropcap
= vidioc_cropcap
,
1781 .vidioc_g_fmt_vbi_capture
= vidioc_g_fmt_vbi_capture
,
1782 .vidioc_try_fmt_vbi_capture
= vidioc_try_set_vbi_capture
,
1783 .vidioc_s_fmt_vbi_capture
= vidioc_try_set_vbi_capture
,
1785 .vidioc_reqbufs
= vidioc_reqbufs
,
1786 .vidioc_querybuf
= vidioc_querybuf
,
1787 .vidioc_qbuf
= vidioc_qbuf
,
1788 .vidioc_dqbuf
= vidioc_dqbuf
,
1789 .vidioc_s_std
= vidioc_s_std
,
1790 .vidioc_enum_input
= vidioc_enum_input
,
1791 .vidioc_g_input
= vidioc_g_input
,
1792 .vidioc_s_input
= vidioc_s_input
,
1793 .vidioc_queryctrl
= vidioc_queryctrl
,
1794 .vidioc_g_ctrl
= vidioc_g_ctrl
,
1795 .vidioc_s_ctrl
= vidioc_s_ctrl
,
1796 .vidioc_streamon
= vidioc_streamon
,
1797 .vidioc_streamoff
= vidioc_streamoff
,
1798 .vidioc_g_tuner
= vidioc_g_tuner
,
1799 .vidioc_s_tuner
= vidioc_s_tuner
,
1800 .vidioc_g_frequency
= vidioc_g_frequency
,
1801 .vidioc_s_frequency
= vidioc_s_frequency
,
1802 #ifdef CONFIG_VIDEO_ADV_DEBUG
1803 .vidioc_g_register
= vidioc_g_register
,
1804 .vidioc_s_register
= vidioc_s_register
,
1806 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1807 .vidiocgmbuf
= vidiocgmbuf
,
1810 .tvnorms
= V4L2_STD_ALL
,
1811 .current_norm
= V4L2_STD_PAL
,
1814 static struct video_device em28xx_radio_template
= {
1815 .name
= "em28xx-radio",
1816 .type
= VID_TYPE_TUNER
,
1817 .fops
= &radio_fops
,
1819 .vidioc_querycap
= radio_querycap
,
1820 .vidioc_g_tuner
= radio_g_tuner
,
1821 .vidioc_enum_input
= radio_enum_input
,
1822 .vidioc_g_audio
= radio_g_audio
,
1823 .vidioc_s_tuner
= radio_s_tuner
,
1824 .vidioc_s_audio
= radio_s_audio
,
1825 .vidioc_s_input
= radio_s_input
,
1826 .vidioc_queryctrl
= radio_queryctrl
,
1827 .vidioc_g_ctrl
= vidioc_g_ctrl
,
1828 .vidioc_s_ctrl
= vidioc_s_ctrl
,
1829 .vidioc_g_frequency
= vidioc_g_frequency
,
1830 .vidioc_s_frequency
= vidioc_s_frequency
,
1831 #ifdef CONFIG_VIDEO_ADV_DEBUG
1832 .vidioc_g_register
= vidioc_g_register
,
1833 .vidioc_s_register
= vidioc_s_register
,
1837 /******************************** usb interface ******************************/
1840 static LIST_HEAD(em28xx_extension_devlist
);
1841 static DEFINE_MUTEX(em28xx_extension_devlist_lock
);
1843 int em28xx_register_extension(struct em28xx_ops
*ops
)
1845 struct em28xx
*h
, *dev
= NULL
;
1847 list_for_each_entry(h
, &em28xx_devlist
, devlist
)
1850 mutex_lock(&em28xx_extension_devlist_lock
);
1851 list_add_tail(&ops
->next
, &em28xx_extension_devlist
);
1855 printk(KERN_INFO
"Em28xx: Initialized (%s) extension\n", ops
->name
);
1856 mutex_unlock(&em28xx_extension_devlist_lock
);
1860 EXPORT_SYMBOL(em28xx_register_extension
);
1862 void em28xx_unregister_extension(struct em28xx_ops
*ops
)
1864 struct em28xx
*h
, *dev
= NULL
;
1866 list_for_each_entry(h
, &em28xx_devlist
, devlist
)
1872 mutex_lock(&em28xx_extension_devlist_lock
);
1873 printk(KERN_INFO
"Em28xx: Removed (%s) extension\n", ops
->name
);
1874 list_del(&ops
->next
);
1875 mutex_unlock(&em28xx_extension_devlist_lock
);
1877 EXPORT_SYMBOL(em28xx_unregister_extension
);
1879 static struct video_device
*em28xx_vdev_init(struct em28xx
*dev
,
1880 const struct video_device
*template,
1882 const char *type_name
)
1884 struct video_device
*vfd
;
1886 vfd
= video_device_alloc();
1891 vfd
->dev
= &dev
->udev
->dev
;
1892 vfd
->release
= video_device_release
;
1894 vfd
->debug
= video_debug
;
1896 snprintf(vfd
->name
, sizeof(vfd
->name
), "%s %s",
1897 dev
->name
, type_name
);
1905 * allocates and inits the device structs, registers i2c bus and v4l device
1907 static int em28xx_init_dev(struct em28xx
**devhandle
, struct usb_device
*udev
,
1910 struct em28xx_ops
*ops
= NULL
;
1911 struct em28xx
*dev
= *devhandle
;
1912 int retval
= -ENOMEM
;
1914 unsigned int maxh
, maxw
;
1917 mutex_init(&dev
->lock
);
1918 spin_lock_init(&dev
->slock
);
1919 init_waitqueue_head(&dev
->open
);
1920 init_waitqueue_head(&dev
->wait_frame
);
1921 init_waitqueue_head(&dev
->wait_stream
);
1923 dev
->em28xx_write_regs
= em28xx_write_regs
;
1924 dev
->em28xx_read_reg
= em28xx_read_reg
;
1925 dev
->em28xx_read_reg_req_len
= em28xx_read_reg_req_len
;
1926 dev
->em28xx_write_regs_req
= em28xx_write_regs_req
;
1927 dev
->em28xx_read_reg_req
= em28xx_read_reg_req
;
1928 dev
->is_em2800
= em28xx_boards
[dev
->model
].is_em2800
;
1930 em28xx_pre_card_setup(dev
);
1932 errCode
= em28xx_config(dev
);
1934 em28xx_errdev("error configuring device\n");
1935 em28xx_devused
&= ~(1<<dev
->devno
);
1940 /* register i2c bus */
1941 em28xx_i2c_register(dev
);
1943 /* Do board specific init and eeprom reading */
1944 em28xx_card_setup(dev
);
1946 /* Configure audio */
1947 em28xx_audio_analog_set(dev
);
1949 /* configure the device */
1950 em28xx_config_i2c(dev
);
1952 /* set default norm */
1953 dev
->norm
= em28xx_video_template
.current_norm
;
1955 maxw
= norm_maxw(dev
);
1956 maxh
= norm_maxh(dev
);
1958 /* set default image size */
1961 dev
->interlaced
= EM28XX_INTERLACED_DEFAULT
;
1966 errCode
= em28xx_config(dev
);
1968 list_add_tail(&dev
->devlist
, &em28xx_devlist
);
1970 /* allocate and fill video video_device struct */
1971 dev
->vdev
= em28xx_vdev_init(dev
, &em28xx_video_template
,
1972 VID_TYPE_CAPTURE
, "video");
1973 if (NULL
== dev
->vdev
) {
1974 em28xx_errdev("cannot allocate video_device.\n");
1977 if (dev
->tuner_type
!= TUNER_ABSENT
)
1978 dev
->vdev
->type
|= VID_TYPE_TUNER
;
1980 /* register v4l2 video video_device */
1981 retval
= video_register_device(dev
->vdev
, VFL_TYPE_GRABBER
,
1982 video_nr
[dev
->devno
]);
1984 em28xx_errdev("unable to register video device (error=%i).\n",
1989 /* Allocate and fill vbi video_device struct */
1990 dev
->vbi_dev
= em28xx_vdev_init(dev
, &em28xx_video_template
,
1991 VFL_TYPE_VBI
, "vbi");
1992 /* register v4l2 vbi video_device */
1993 if (video_register_device(dev
->vbi_dev
, VFL_TYPE_VBI
,
1994 vbi_nr
[dev
->devno
]) < 0) {
1995 em28xx_errdev("unable to register vbi device\n");
2000 if (em28xx_boards
[dev
->model
].radio
.type
== EM28XX_RADIO
) {
2001 dev
->radio_dev
= em28xx_vdev_init(dev
, &em28xx_radio_template
,
2002 VFL_TYPE_RADIO
, "radio");
2003 if (NULL
== dev
->radio_dev
) {
2004 em28xx_errdev("cannot allocate video_device.\n");
2007 retval
= video_register_device(dev
->radio_dev
, VFL_TYPE_RADIO
,
2008 radio_nr
[dev
->devno
]);
2010 em28xx_errdev("can't register radio device\n");
2013 em28xx_info("Registered radio device as /dev/radio%d\n",
2014 dev
->radio_dev
->minor
& 0x1f);
2017 /* init video dma queues */
2018 INIT_LIST_HEAD(&dev
->vidq
.active
);
2019 INIT_LIST_HEAD(&dev
->vidq
.queued
);
2022 if (dev
->has_msp34xx
) {
2023 /* Send a reset to other chips via gpio */
2024 em28xx_write_regs_req(dev
, 0x00, 0x08, "\xf7", 1);
2026 em28xx_write_regs_req(dev
, 0x00, 0x08, "\xff", 1);
2032 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
2033 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
,
2034 dev
->vbi_dev
->minor
-MINOR_VFL_TYPE_VBI_MIN
);
2036 mutex_lock(&em28xx_extension_devlist_lock
);
2037 if (!list_empty(&em28xx_extension_devlist
)) {
2038 list_for_each_entry(ops
, &em28xx_extension_devlist
, next
) {
2043 mutex_unlock(&em28xx_extension_devlist_lock
);
2048 em28xx_release_resources(dev
);
2049 mutex_unlock(&dev
->lock
);
2054 #if defined(CONFIG_MODULES) && defined(MODULE)
2055 static void request_module_async(struct work_struct
*work
)
2057 struct em28xx
*dev
= container_of(work
,
2058 struct em28xx
, request_module_wk
);
2060 if (dev
->has_audio_class
)
2061 request_module("snd-usb-audio");
2063 request_module("em28xx-alsa");
2066 request_module("em28xx-dvb");
2069 static void request_modules(struct em28xx
*dev
)
2071 INIT_WORK(&dev
->request_module_wk
, request_module_async
);
2072 schedule_work(&dev
->request_module_wk
);
2075 #define request_modules(dev)
2076 #endif /* CONFIG_MODULES */
2079 * em28xx_usb_probe()
2080 * checks for supported devices
2082 static int em28xx_usb_probe(struct usb_interface
*interface
,
2083 const struct usb_device_id
*id
)
2085 const struct usb_endpoint_descriptor
*endpoint
;
2086 struct usb_device
*udev
;
2087 struct usb_interface
*uif
;
2088 struct em28xx
*dev
= NULL
;
2089 int retval
= -ENODEV
;
2092 udev
= usb_get_dev(interface_to_usbdev(interface
));
2093 ifnum
= interface
->altsetting
[0].desc
.bInterfaceNumber
;
2095 /* Check to see next free device and mark as used */
2096 nr
= find_first_zero_bit(&em28xx_devused
, EM28XX_MAXBOARDS
);
2097 em28xx_devused
|= 1<<nr
;
2099 /* Don't register audio interfaces */
2100 if (interface
->altsetting
[0].desc
.bInterfaceClass
== USB_CLASS_AUDIO
) {
2101 em28xx_err(DRIVER_NAME
" audio device (%04x:%04x): interface %i, class %i\n",
2102 udev
->descriptor
.idVendor
,
2103 udev
->descriptor
.idProduct
,
2105 interface
->altsetting
[0].desc
.bInterfaceClass
);
2107 em28xx_devused
&= ~(1<<nr
);
2111 em28xx_err(DRIVER_NAME
" new video device (%04x:%04x): interface %i, class %i\n",
2112 udev
->descriptor
.idVendor
,
2113 udev
->descriptor
.idProduct
,
2115 interface
->altsetting
[0].desc
.bInterfaceClass
);
2117 endpoint
= &interface
->cur_altsetting
->endpoint
[1].desc
;
2119 /* check if the device has the iso in endpoint at the correct place */
2120 if ((endpoint
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
2121 USB_ENDPOINT_XFER_ISOC
) {
2122 em28xx_err(DRIVER_NAME
" probing error: endpoint is non-ISO endpoint!\n");
2123 em28xx_devused
&= ~(1<<nr
);
2126 if ((endpoint
->bEndpointAddress
& USB_ENDPOINT_DIR_MASK
) == USB_DIR_OUT
) {
2127 em28xx_err(DRIVER_NAME
" probing error: endpoint is ISO OUT endpoint!\n");
2128 em28xx_devused
&= ~(1<<nr
);
2132 if (nr
>= EM28XX_MAXBOARDS
) {
2133 printk(DRIVER_NAME
": Supports only %i em28xx boards.\n",
2135 em28xx_devused
&= ~(1<<nr
);
2139 /* allocate memory for our device state and initialize it */
2140 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
2142 em28xx_err(DRIVER_NAME
": out of memory!\n");
2143 em28xx_devused
&= ~(1<<nr
);
2147 snprintf(dev
->name
, 29, "em28xx #%d", nr
);
2149 dev
->model
= id
->driver_info
;
2152 /* Checks if audio is provided by some interface */
2153 for (i
= 0; i
< udev
->config
->desc
.bNumInterfaces
; i
++) {
2154 uif
= udev
->config
->interface
[i
];
2155 if (uif
->altsetting
[0].desc
.bInterfaceClass
== USB_CLASS_AUDIO
) {
2156 dev
->has_audio_class
= 1;
2161 printk(KERN_INFO DRIVER_NAME
" %s usb audio class\n",
2162 dev
->has_audio_class
? "Has" : "Doesn't have");
2164 /* compute alternate max packet sizes */
2165 uif
= udev
->actconfig
->interface
[0];
2167 dev
->num_alt
= uif
->num_altsetting
;
2168 em28xx_info("Alternate settings: %i\n", dev
->num_alt
);
2169 /* dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)* */
2170 dev
->alt_max_pkt_size
= kmalloc(32 * dev
->num_alt
, GFP_KERNEL
);
2172 if (dev
->alt_max_pkt_size
== NULL
) {
2173 em28xx_errdev("out of memory!\n");
2174 em28xx_devused
&= ~(1<<nr
);
2179 for (i
= 0; i
< dev
->num_alt
; i
++) {
2180 u16 tmp
= le16_to_cpu(uif
->altsetting
[i
].endpoint
[1].desc
.
2182 dev
->alt_max_pkt_size
[i
] =
2183 (tmp
& 0x07ff) * (((tmp
& 0x1800) >> 11) + 1);
2184 em28xx_info("Alternate setting %i, max size= %i\n", i
,
2185 dev
->alt_max_pkt_size
[i
]);
2188 if ((card
[nr
] >= 0) && (card
[nr
] < em28xx_bcount
))
2189 dev
->model
= card
[nr
];
2191 /* allocate device struct */
2192 retval
= em28xx_init_dev(&dev
, udev
, nr
);
2196 em28xx_info("Found %s\n", em28xx_boards
[dev
->model
].name
);
2198 /* save our data pointer in this interface device */
2199 usb_set_intfdata(interface
, dev
);
2201 request_modules(dev
);
2207 * em28xx_usb_disconnect()
2208 * called when the device gets diconencted
2209 * video device will be unregistered on v4l2_close in case it is still open
2211 static void em28xx_usb_disconnect(struct usb_interface
*interface
)
2214 struct em28xx_ops
*ops
= NULL
;
2216 dev
= usb_get_intfdata(interface
);
2217 usb_set_intfdata(interface
, NULL
);
2222 em28xx_info("disconnecting %s\n", dev
->vdev
->name
);
2224 /* wait until all current v4l2 io is finished then deallocate
2226 mutex_lock(&dev
->lock
);
2228 wake_up_interruptible_all(&dev
->open
);
2232 ("device /dev/video%d is open! Deregistration and memory "
2233 "deallocation are deferred on close.\n",
2234 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
);
2236 dev
->state
|= DEV_MISCONFIGURED
;
2237 em28xx_uninit_isoc(dev
);
2238 dev
->state
|= DEV_DISCONNECTED
;
2239 wake_up_interruptible(&dev
->wait_frame
);
2240 wake_up_interruptible(&dev
->wait_stream
);
2242 dev
->state
|= DEV_DISCONNECTED
;
2243 em28xx_release_resources(dev
);
2245 mutex_unlock(&dev
->lock
);
2247 mutex_lock(&em28xx_extension_devlist_lock
);
2248 if (!list_empty(&em28xx_extension_devlist
)) {
2249 list_for_each_entry(ops
, &em28xx_extension_devlist
, next
) {
2253 mutex_unlock(&em28xx_extension_devlist_lock
);
2256 kfree(dev
->alt_max_pkt_size
);
2261 static struct usb_driver em28xx_usb_driver
= {
2263 .probe
= em28xx_usb_probe
,
2264 .disconnect
= em28xx_usb_disconnect
,
2265 .id_table
= em28xx_id_table
,
2268 static int __init
em28xx_module_init(void)
2272 printk(KERN_INFO DRIVER_NAME
" v4l2 driver version %d.%d.%d loaded\n",
2273 (EM28XX_VERSION_CODE
>> 16) & 0xff,
2274 (EM28XX_VERSION_CODE
>> 8) & 0xff, EM28XX_VERSION_CODE
& 0xff);
2276 printk(KERN_INFO DRIVER_NAME
" snapshot date %04d-%02d-%02d\n",
2277 SNAPSHOT
/ 10000, (SNAPSHOT
/ 100) % 100, SNAPSHOT
% 100);
2280 /* register this driver with the USB subsystem */
2281 result
= usb_register(&em28xx_usb_driver
);
2283 em28xx_err(DRIVER_NAME
2284 " usb_register failed. Error number %d.\n", result
);
2289 static void __exit
em28xx_module_exit(void)
2291 /* deregister this driver with the USB subsystem */
2292 usb_deregister(&em28xx_usb_driver
);
2295 module_init(em28xx_module_init
);
2296 module_exit(em28xx_module_exit
);