2 em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
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>
9 Some parts based on SN9C10x PC Camera Controllers GPL driver made
10 by Luca Risolia <luca.risolia@studio.unibo.it>
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.
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.
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.
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>
36 #include <linux/mutex.h>
39 #include <media/v4l2-common.h>
40 #include <media/msp3400.h>
41 #include <media/tuner.h>
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>"
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)
52 #define em28xx_videodbg(fmt, arg...) do {\
54 printk(KERN_INFO "%s %s :"fmt, \
55 dev->name, __FUNCTION__ , ##arg); } while (0)
57 MODULE_AUTHOR(DRIVER_AUTHOR
);
58 MODULE_DESCRIPTION(DRIVER_DESC
);
59 MODULE_LICENSE("GPL");
61 static LIST_HEAD(em28xx_devlist
);
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
};
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");
77 static unsigned int video_debug
= 0;
78 module_param(video_debug
,int,0644);
79 MODULE_PARM_DESC(video_debug
,"enable debug messages [video]");
81 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
82 static unsigned long em28xx_devused
;
84 /* supported controls */
85 /* Common to all boards */
86 static struct v4l2_queryctrl em28xx_qctrl
[] = {
88 .id
= V4L2_CID_AUDIO_VOLUME
,
89 .type
= V4L2_CTRL_TYPE_INTEGER
,
94 .default_value
= 0x1f,
97 .id
= V4L2_CID_AUDIO_MUTE
,
98 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
108 static struct usb_driver em28xx_usb_driver
;
111 /********************* v4l2 interface ******************************************/
115 * inits registers with sane defaults
117 static int em28xx_config(struct em28xx
*dev
)
120 /* Sets I2C speed to 100 KHz */
122 em28xx_write_regs_req(dev
, 0x00, 0x06, "\x40", 1);
124 /* enable vbi capturing */
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);
130 dev
->mute
= 1; /* maybe not the right place... */
133 em28xx_outfmt_set_yuv422(dev
);
134 em28xx_colorlevels_set_default(dev
);
135 em28xx_compression_disable(dev
);
141 * em28xx_config_i2c()
142 * configure i2c attached devices
144 static void em28xx_config_i2c(struct em28xx
*dev
)
146 struct v4l2_routing route
;
148 route
.input
= INPUT(dev
->ctl_input
)->vmux
;
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
);
156 * em28xx_empty_framequeues()
157 * prepare queues for incoming and outgoing frames
159 static void em28xx_empty_framequeues(struct em28xx
*dev
)
163 INIT_LIST_HEAD(&dev
->inqueue
);
164 INIT_LIST_HEAD(&dev
->outqueue
);
166 for (i
= 0; i
< EM28XX_NUM_FRAMES
; i
++) {
167 dev
->frame
[i
].state
= F_UNUSED
;
168 dev
->frame
[i
].buf
.bytesused
= 0;
172 static void video_mux(struct em28xx
*dev
, int index
)
174 struct v4l2_routing route
;
176 route
.input
= INPUT(index
)->vmux
;
178 dev
->ctl_input
= index
;
179 dev
->ctl_ainput
= INPUT(index
)->amux
;
181 em28xx_i2c_call_clients(dev
, VIDIOC_INT_S_VIDEO_ROUTING
, &route
);
183 if (dev
->has_msp34xx
) {
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
);
192 em28xx_set_audio_source(dev
);
195 /* Usage lock check functions */
196 static int res_get(struct em28xx_fh
*fh
)
198 struct em28xx
*dev
= fh
->dev
;
201 /* This instance already has stream_on */
205 mutex_lock(&dev
->lock
);
214 mutex_unlock(&dev
->lock
);
218 static int res_check(struct em28xx_fh
*fh
)
220 return (fh
->stream_on
);
223 static void res_free(struct em28xx_fh
*fh
)
225 struct em28xx
*dev
= fh
->dev
;
227 mutex_lock(&dev
->lock
);
230 mutex_unlock(&dev
->lock
);
236 static void em28xx_vm_open(struct vm_area_struct
*vma
)
238 struct em28xx_frame_t
*f
= vma
->vm_private_data
;
245 static void em28xx_vm_close(struct vm_area_struct
*vma
)
247 /* NOTE: buffers are not freed here */
248 struct em28xx_frame_t
*f
= vma
->vm_private_data
;
250 if (f
->vma_use_count
)
254 static struct vm_operations_struct em28xx_vm_ops
= {
255 .open
= em28xx_vm_open
,
256 .close
= em28xx_vm_close
,
262 * return the current saturation, brightness or contrast, mute state
264 static int em28xx_get_ctrl(struct em28xx
*dev
, struct v4l2_control
*ctrl
)
267 case V4L2_CID_AUDIO_MUTE
:
268 ctrl
->value
= dev
->mute
;
270 case V4L2_CID_AUDIO_VOLUME
:
271 ctrl
->value
= dev
->volume
;
280 * mute or set new saturation, brightness or contrast
282 static int em28xx_set_ctrl(struct em28xx
*dev
, const struct v4l2_control
*ctrl
)
285 case V4L2_CID_AUDIO_MUTE
:
286 if (ctrl
->value
!= dev
->mute
) {
287 dev
->mute
= ctrl
->value
;
288 return em28xx_audio_analog_set(dev
);
291 case V4L2_CID_AUDIO_VOLUME
:
292 dev
->volume
= ctrl
->value
;
293 return em28xx_audio_analog_set(dev
);
300 * em28xx_stream_interrupt()
303 static int em28xx_stream_interrupt(struct em28xx
*dev
)
307 /* stop reading from the device */
309 dev
->stream
= STREAM_INTERRUPT
;
310 rc
= wait_event_timeout(dev
->wait_stream
,
311 (dev
->stream
== STREAM_OFF
) ||
312 (dev
->state
& DEV_DISCONNECTED
),
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
);
327 static int check_dev(struct em28xx
*dev
)
329 if (dev
->state
& DEV_DISCONNECTED
) {
330 em28xx_errdev("v4l2 ioctl: device not present\n");
334 if (dev
->state
& DEV_MISCONFIGURED
) {
335 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
336 "close and open it again\n");
342 static void get_scale(struct em28xx
*dev
,
343 unsigned int width
, unsigned int height
,
344 unsigned int *hscale
, unsigned int *vscale
)
346 unsigned int maxw
= norm_maxw(dev
);
347 unsigned int maxh
= norm_maxh(dev
);
349 *hscale
= (((unsigned long)maxw
) << 12) / width
- 4096L;
350 if (*hscale
>= 0x4000)
353 *vscale
= (((unsigned long)maxh
) << 12) / height
- 4096L;
354 if (*vscale
>= 0x4000)
358 /* ------------------------------------------------------------------
359 IOCTL vidioc handling
360 ------------------------------------------------------------------*/
362 static int vidioc_g_fmt_cap(struct file
*file
, void *priv
,
363 struct v4l2_format
*f
)
365 struct em28xx_fh
*fh
= priv
;
366 struct em28xx
*dev
= fh
->dev
;
368 mutex_lock(&dev
->lock
);
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
;
377 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
378 f
->fmt
.pix
.field
= dev
->interlaced
?
379 V4L2_FIELD_INTERLACED
: V4L2_FIELD_TOP
;
381 mutex_unlock(&dev
->lock
);
385 static int vidioc_try_fmt_cap(struct file
*file
, void *priv
,
386 struct v4l2_format
*f
)
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
;
396 /* width must even because of the YUYV format
397 height must be even because of interlacing */
410 mutex_lock(&dev
->lock
);
412 if (dev
->is_em2800
) {
413 /* the em2800 can only scale down to 50% */
414 if (height
% (maxh
/ 2))
416 if (width
% (maxw
/ 2))
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
)
428 get_scale(dev
, width
, height
, &hscale
, &vscale
);
430 width
= (((unsigned long)maxw
) << 12) / (hscale
+ 4096L);
431 height
= (((unsigned long)maxh
) << 12) / (vscale
+ 4096L);
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
;
441 mutex_unlock(&dev
->lock
);
445 static int vidioc_s_fmt_cap(struct file
*file
, void *priv
,
446 struct v4l2_format
*f
)
448 struct em28xx_fh
*fh
= priv
;
449 struct em28xx
*dev
= fh
->dev
;
456 vidioc_try_fmt_cap(file
, priv
, f
);
458 mutex_lock(&dev
->lock
);
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");
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
);
476 em28xx_release_buffers(dev
);
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
);
487 /* FIXME: This is really weird! Why capture is starting with
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
);
498 mutex_unlock(&dev
->lock
);
502 static int vidioc_s_std(struct file
*file
, void *priv
, v4l2_std_id
*norm
)
504 struct em28xx_fh
*fh
= priv
;
505 struct em28xx
*dev
= fh
->dev
;
506 struct v4l2_format f
;
513 mutex_lock(&dev
->lock
);
515 mutex_unlock(&dev
->lock
);
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
);
522 mutex_lock(&dev
->lock
);
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
);
532 em28xx_resolution_set(dev
);
533 em28xx_i2c_call_clients(dev
, VIDIOC_S_STD
, &dev
->norm
);
535 mutex_unlock(&dev
->lock
);
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",
551 static int vidioc_enum_input(struct file
*file
, void *priv
,
552 struct v4l2_input
*i
)
554 struct em28xx_fh
*fh
= priv
;
555 struct em28xx
*dev
= fh
->dev
;
559 if (n
>= MAX_EM28XX_INPUT
)
561 if (0 == INPUT(n
)->type
)
565 i
->type
= V4L2_INPUT_TYPE_CAMERA
;
567 strcpy(i
->name
, iname
[INPUT(n
)->type
]);
569 if ((EM28XX_VMUX_TELEVISION
== INPUT(n
)->type
) ||
570 (EM28XX_VMUX_CABLE
== INPUT(n
)->type
))
571 i
->type
= V4L2_INPUT_TYPE_TUNER
;
573 i
->std
= dev
->vdev
->tvnorms
;
578 static int vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
580 struct em28xx_fh
*fh
= priv
;
581 struct em28xx
*dev
= fh
->dev
;
588 static int vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
590 struct em28xx_fh
*fh
= priv
;
591 struct em28xx
*dev
= fh
->dev
;
598 if (i
>= MAX_EM28XX_INPUT
)
600 if (0 == INPUT(i
)->type
)
603 mutex_lock(&dev
->lock
);
607 mutex_unlock(&dev
->lock
);
611 static int vidioc_g_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
613 struct em28xx_fh
*fh
= priv
;
614 struct em28xx
*dev
= fh
->dev
;
615 unsigned int index
= a
->index
;
620 index
= dev
->ctl_ainput
;
623 strcpy(a
->name
, "Television");
625 strcpy(a
->name
, "Line In");
627 a
->capability
= V4L2_AUDCAP_STEREO
;
633 static int vidioc_s_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
635 struct em28xx_fh
*fh
= priv
;
636 struct em28xx
*dev
= fh
->dev
;
638 if (a
->index
!= dev
->ctl_ainput
)
644 static int vidioc_queryctrl(struct file
*file
, void *priv
,
645 struct v4l2_queryctrl
*qc
)
647 struct em28xx_fh
*fh
= priv
;
648 struct em28xx
*dev
= fh
->dev
;
657 memset(qc
, 0, sizeof(*qc
));
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
));
669 mutex_lock(&dev
->lock
);
670 em28xx_i2c_call_clients(dev
, VIDIOC_QUERYCTRL
, qc
);
671 mutex_unlock(&dev
->lock
);
679 static int vidioc_g_ctrl(struct file
*file
, void *priv
,
680 struct v4l2_control
*ctrl
)
682 struct em28xx_fh
*fh
= priv
;
683 struct em28xx
*dev
= fh
->dev
;
689 mutex_lock(&dev
->lock
);
691 if (!dev
->has_msp34xx
)
692 rc
= em28xx_get_ctrl(dev
, ctrl
);
697 em28xx_i2c_call_clients(dev
, VIDIOC_G_CTRL
, ctrl
);
701 mutex_unlock(&dev
->lock
);
705 static int vidioc_s_ctrl(struct file
*file
, void *priv
,
706 struct v4l2_control
*ctrl
)
708 struct em28xx_fh
*fh
= priv
;
709 struct em28xx
*dev
= fh
->dev
;
717 mutex_lock(&dev
->lock
);
719 if (dev
->has_msp34xx
)
720 em28xx_i2c_call_clients(dev
, VIDIOC_S_CTRL
, ctrl
);
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
) {
731 rc
= em28xx_set_ctrl(dev
, ctrl
);
737 /* Control not found - try to send it to the attached devices */
739 em28xx_i2c_call_clients(dev
, VIDIOC_S_CTRL
, ctrl
);
743 mutex_unlock(&dev
->lock
);
747 static int vidioc_g_tuner(struct file
*file
, void *priv
,
748 struct v4l2_tuner
*t
)
750 struct em28xx_fh
*fh
= priv
;
751 struct em28xx
*dev
= fh
->dev
;
761 strcpy(t
->name
, "Tuner");
763 mutex_lock(&dev
->lock
);
765 em28xx_i2c_call_clients(dev
, VIDIOC_G_TUNER
, t
);
767 mutex_unlock(&dev
->lock
);
771 static int vidioc_s_tuner(struct file
*file
, void *priv
,
772 struct v4l2_tuner
*t
)
774 struct em28xx_fh
*fh
= priv
;
775 struct em28xx
*dev
= fh
->dev
;
785 mutex_lock(&dev
->lock
);
787 em28xx_i2c_call_clients(dev
, VIDIOC_S_TUNER
, t
);
789 mutex_unlock(&dev
->lock
);
793 static int vidioc_g_frequency(struct file
*file
, void *priv
,
794 struct v4l2_frequency
*f
)
796 struct em28xx_fh
*fh
= priv
;
797 struct em28xx
*dev
= fh
->dev
;
799 f
->type
= fh
->radio
? V4L2_TUNER_RADIO
: V4L2_TUNER_ANALOG_TV
;
800 f
->frequency
= dev
->ctl_freq
;
805 static int vidioc_s_frequency(struct file
*file
, void *priv
,
806 struct v4l2_frequency
*f
)
808 struct em28xx_fh
*fh
= priv
;
809 struct em28xx
*dev
= fh
->dev
;
819 if (unlikely(0 == fh
->radio
&& f
->type
!= V4L2_TUNER_ANALOG_TV
))
821 if (unlikely(1 == fh
->radio
&& f
->type
!= V4L2_TUNER_RADIO
))
824 mutex_lock(&dev
->lock
);
826 dev
->ctl_freq
= f
->frequency
;
827 em28xx_i2c_call_clients(dev
, VIDIOC_S_FREQUENCY
, f
);
829 mutex_unlock(&dev
->lock
);
833 static int vidioc_cropcap(struct file
*file
, void *priv
,
834 struct v4l2_cropcap
*cc
)
836 struct em28xx_fh
*fh
= priv
;
837 struct em28xx
*dev
= fh
->dev
;
839 if (cc
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
844 cc
->bounds
.width
= dev
->width
;
845 cc
->bounds
.height
= dev
->height
;
846 cc
->defrect
= cc
->bounds
;
847 cc
->pixelaspect
.numerator
= 54; /* 4:3 FIXME: remove magic numbers */
848 cc
->pixelaspect
.denominator
= 59;
853 static int vidioc_streamon(struct file
*file
, void *priv
,
854 enum v4l2_buf_type type
)
856 struct em28xx_fh
*fh
= priv
;
857 struct em28xx
*dev
= fh
->dev
;
864 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
)
867 if (list_empty(&dev
->inqueue
))
870 mutex_lock(&dev
->lock
);
872 if (unlikely(res_get(fh
) < 0)) {
873 mutex_unlock(&dev
->lock
);
877 dev
->stream
= STREAM_ON
; /* FIXME: Start video capture here? */
879 mutex_unlock(&dev
->lock
);
883 static int vidioc_streamoff(struct file
*file
, void *priv
,
884 enum v4l2_buf_type type
)
886 struct em28xx_fh
*fh
= priv
;
887 struct em28xx
*dev
= fh
->dev
;
894 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
)
897 mutex_lock(&dev
->lock
);
899 if (dev
->stream
== STREAM_ON
) {
900 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
901 rc
= em28xx_stream_interrupt(dev
);
903 mutex_unlock(&dev
->lock
);
908 em28xx_empty_framequeues(dev
);
910 mutex_unlock(&dev
->lock
);
914 static int vidioc_querycap(struct file
*file
, void *priv
,
915 struct v4l2_capability
*cap
)
917 struct em28xx_fh
*fh
= priv
;
918 struct em28xx
*dev
= fh
->dev
;
920 strlcpy(cap
->driver
, "em28xx", sizeof(cap
->driver
));
921 strlcpy(cap
->card
, em28xx_boards
[dev
->model
].name
, sizeof(cap
->card
));
922 strlcpy(cap
->bus_info
, dev
->udev
->dev
.bus_id
, sizeof(cap
->bus_info
));
924 cap
->version
= EM28XX_VERSION_CODE
;
927 V4L2_CAP_SLICED_VBI_CAPTURE
|
928 V4L2_CAP_VIDEO_CAPTURE
|
930 V4L2_CAP_READWRITE
| V4L2_CAP_STREAMING
;
932 if (dev
->tuner_type
!= TUNER_ABSENT
)
933 cap
->capabilities
|= V4L2_CAP_TUNER
;
938 static int vidioc_enum_fmt_cap(struct file
*file
, void *priv
,
939 struct v4l2_fmtdesc
*fmtd
)
941 if (fmtd
->index
!= 0)
944 fmtd
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
945 strcpy(fmtd
->description
, "Packed YUY2");
946 fmtd
->pixelformat
= V4L2_PIX_FMT_YUYV
;
947 memset(fmtd
->reserved
, 0, sizeof(fmtd
->reserved
));
952 /* Sliced VBI ioctls */
953 static int vidioc_g_fmt_vbi_capture(struct file
*file
, void *priv
,
954 struct v4l2_format
*f
)
956 struct em28xx_fh
*fh
= priv
;
957 struct em28xx
*dev
= fh
->dev
;
964 mutex_lock(&dev
->lock
);
966 f
->fmt
.sliced
.service_set
= 0;
968 em28xx_i2c_call_clients(dev
, VIDIOC_G_FMT
, f
);
970 if (f
->fmt
.sliced
.service_set
== 0)
973 mutex_unlock(&dev
->lock
);
977 static int vidioc_try_set_vbi_capture(struct file
*file
, void *priv
,
978 struct v4l2_format
*f
)
980 struct em28xx_fh
*fh
= priv
;
981 struct em28xx
*dev
= fh
->dev
;
988 mutex_lock(&dev
->lock
);
989 em28xx_i2c_call_clients(dev
, VIDIOC_G_FMT
, f
);
990 mutex_unlock(&dev
->lock
);
992 if (f
->fmt
.sliced
.service_set
== 0)
999 static int vidioc_reqbufs(struct file
*file
, void *priv
,
1000 struct v4l2_requestbuffers
*rb
)
1002 struct em28xx_fh
*fh
= priv
;
1003 struct em28xx
*dev
= fh
->dev
;
1007 rc
= check_dev(dev
);
1011 if (rb
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
||
1012 rb
->memory
!= V4L2_MEMORY_MMAP
)
1015 if (dev
->io
== IO_READ
) {
1016 em28xx_videodbg("method is set to read;"
1017 " close and open the device again to"
1018 " choose the mmap I/O method\n");
1022 for (i
= 0; i
< dev
->num_frames
; i
++)
1023 if (dev
->frame
[i
].vma_use_count
) {
1024 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1025 "previous buffers are still mapped\n");
1029 mutex_lock(&dev
->lock
);
1031 if (dev
->stream
== STREAM_ON
) {
1032 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1033 rc
= em28xx_stream_interrupt(dev
);
1035 mutex_unlock(&dev
->lock
);
1040 em28xx_empty_framequeues(dev
);
1042 em28xx_release_buffers(dev
);
1044 rb
->count
= em28xx_request_buffers(dev
, rb
->count
);
1046 dev
->frame_current
= NULL
;
1047 dev
->io
= rb
->count
? IO_MMAP
: IO_NONE
;
1049 mutex_unlock(&dev
->lock
);
1053 static int vidioc_querybuf(struct file
*file
, void *priv
,
1054 struct v4l2_buffer
*b
)
1056 struct em28xx_fh
*fh
= priv
;
1057 struct em28xx
*dev
= fh
->dev
;
1060 rc
= check_dev(dev
);
1064 if (b
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
||
1065 b
->index
>= dev
->num_frames
|| dev
->io
!= IO_MMAP
)
1068 mutex_lock(&dev
->lock
);
1070 memcpy(b
, &dev
->frame
[b
->index
].buf
, sizeof(*b
));
1072 if (dev
->frame
[b
->index
].vma_use_count
)
1073 b
->flags
|= V4L2_BUF_FLAG_MAPPED
;
1075 if (dev
->frame
[b
->index
].state
== F_DONE
)
1076 b
->flags
|= V4L2_BUF_FLAG_DONE
;
1077 else if (dev
->frame
[b
->index
].state
!= F_UNUSED
)
1078 b
->flags
|= V4L2_BUF_FLAG_QUEUED
;
1080 mutex_unlock(&dev
->lock
);
1084 static int vidioc_qbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*b
)
1086 struct em28xx_fh
*fh
= priv
;
1087 struct em28xx
*dev
= fh
->dev
;
1088 unsigned long lock_flags
;
1091 rc
= check_dev(dev
);
1095 if (b
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
||
1096 b
->index
>= dev
->num_frames
)
1099 if (dev
->frame
[b
->index
].state
!= F_UNUSED
)
1102 dev
->frame
[b
->index
].state
= F_QUEUED
;
1104 /* add frame to fifo */
1105 spin_lock_irqsave(&dev
->queue_lock
, lock_flags
);
1106 list_add_tail(&dev
->frame
[b
->index
].frame
, &dev
->inqueue
);
1107 spin_unlock_irqrestore(&dev
->queue_lock
, lock_flags
);
1112 static int vidioc_dqbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*b
)
1114 struct em28xx_fh
*fh
= priv
;
1115 struct em28xx
*dev
= fh
->dev
;
1117 struct em28xx_frame_t
*f
;
1118 unsigned long lock_flags
;
1120 rc
= check_dev(dev
);
1124 if (b
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
)
1127 if (list_empty(&dev
->outqueue
)) {
1128 if (dev
->stream
== STREAM_OFF
)
1131 if (file
->f_flags
& O_NONBLOCK
)
1134 rc
= wait_event_interruptible(dev
->wait_frame
,
1135 (!list_empty(&dev
->outqueue
)) ||
1136 (dev
->state
& DEV_DISCONNECTED
));
1140 if (dev
->state
& DEV_DISCONNECTED
)
1144 spin_lock_irqsave(&dev
->queue_lock
, lock_flags
);
1145 f
= list_entry(dev
->outqueue
.next
, struct em28xx_frame_t
, frame
);
1146 list_del(dev
->outqueue
.next
);
1147 spin_unlock_irqrestore(&dev
->queue_lock
, lock_flags
);
1149 f
->state
= F_UNUSED
;
1150 memcpy(b
, &f
->buf
, sizeof(*b
));
1152 if (f
->vma_use_count
)
1153 b
->flags
|= V4L2_BUF_FLAG_MAPPED
;
1158 /* ----------------------------------------------------------- */
1159 /* RADIO ESPECIFIC IOCTLS */
1160 /* ----------------------------------------------------------- */
1162 static int radio_querycap(struct file
*file
, void *priv
,
1163 struct v4l2_capability
*cap
)
1165 struct em28xx
*dev
= ((struct em28xx_fh
*)priv
)->dev
;
1167 strlcpy(cap
->driver
, "em28xx", sizeof(cap
->driver
));
1168 strlcpy(cap
->card
, em28xx_boards
[dev
->model
].name
, sizeof(cap
->card
));
1169 strlcpy(cap
->bus_info
, dev
->udev
->dev
.bus_id
, sizeof(cap
->bus_info
));
1171 cap
->version
= EM28XX_VERSION_CODE
;
1172 cap
->capabilities
= V4L2_CAP_TUNER
;
1176 static int radio_g_tuner(struct file
*file
, void *priv
,
1177 struct v4l2_tuner
*t
)
1179 struct em28xx
*dev
= ((struct em28xx_fh
*)priv
)->dev
;
1181 if (unlikely(t
->index
> 0))
1184 strcpy(t
->name
, "Radio");
1185 t
->type
= V4L2_TUNER_RADIO
;
1187 em28xx_i2c_call_clients(dev
, VIDIOC_G_TUNER
, t
);
1191 static int radio_enum_input(struct file
*file
, void *priv
,
1192 struct v4l2_input
*i
)
1196 strcpy(i
->name
, "Radio");
1197 i
->type
= V4L2_INPUT_TYPE_TUNER
;
1202 static int radio_g_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
1204 if (unlikely(a
->index
))
1207 strcpy(a
->name
, "Radio");
1211 static int radio_s_tuner(struct file
*file
, void *priv
,
1212 struct v4l2_tuner
*t
)
1214 struct em28xx
*dev
= ((struct em28xx_fh
*)priv
)->dev
;
1219 em28xx_i2c_call_clients(dev
, VIDIOC_S_TUNER
, t
);
1224 static int radio_s_audio(struct file
*file
, void *fh
,
1225 struct v4l2_audio
*a
)
1230 static int radio_s_input(struct file
*file
, void *fh
, unsigned int i
)
1235 static int radio_queryctrl(struct file
*file
, void *priv
,
1236 struct v4l2_queryctrl
*qc
)
1240 if (qc
->id
< V4L2_CID_BASE
||
1241 qc
->id
>= V4L2_CID_LASTP1
)
1244 for (i
= 0; i
< ARRAY_SIZE(em28xx_qctrl
); i
++) {
1245 if (qc
->id
&& qc
->id
== em28xx_qctrl
[i
].id
) {
1246 memcpy(qc
, &(em28xx_qctrl
[i
]), sizeof(*qc
));
1255 * em28xx_v4l2_open()
1256 * inits the device and starts isoc transfer
1258 static int em28xx_v4l2_open(struct inode
*inode
, struct file
*filp
)
1260 int minor
= iminor(inode
);
1261 int errCode
= 0, radio
= 0;
1262 struct em28xx
*h
,*dev
= NULL
;
1263 struct em28xx_fh
*fh
;
1265 list_for_each_entry(h
, &em28xx_devlist
, devlist
) {
1266 if (h
->vdev
->minor
== minor
) {
1268 dev
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1270 if (h
->vbi_dev
->minor
== minor
) {
1272 dev
->type
= V4L2_BUF_TYPE_VBI_CAPTURE
;
1275 h
->radio_dev
->minor
== minor
) {
1283 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1284 minor
,v4l2_type_names
[dev
->type
],dev
->users
);
1286 fh
= kzalloc(sizeof(struct em28xx_fh
), GFP_KERNEL
);
1289 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1292 mutex_lock(&dev
->lock
);
1295 filp
->private_data
= fh
;
1297 if (dev
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
&& dev
->users
== 0) {
1298 em28xx_set_alternate(dev
);
1300 dev
->width
= norm_maxw(dev
);
1301 dev
->height
= norm_maxh(dev
);
1302 dev
->frame_size
= dev
->width
* dev
->height
* 2;
1303 dev
->field_size
= dev
->frame_size
>> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1304 dev
->bytesperline
= dev
->width
* 2;
1308 em28xx_capture_start(dev
, 1);
1309 em28xx_resolution_set(dev
);
1312 /* start the transfer */
1313 errCode
= em28xx_init_isoc(dev
);
1317 em28xx_empty_framequeues(dev
);
1320 em28xx_videodbg("video_open: setting radio device\n");
1321 em28xx_i2c_call_clients(dev
, AUDC_SET_RADIO
, NULL
);
1327 mutex_unlock(&dev
->lock
);
1332 * em28xx_realease_resources()
1333 * unregisters the v4l2,i2c and usb devices
1334 * called when the device gets disconected or at module unload
1336 static void em28xx_release_resources(struct em28xx
*dev
)
1339 /*FIXME: I2C IR should be disconnected */
1341 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1342 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
,
1343 dev
->vbi_dev
->minor
-MINOR_VFL_TYPE_VBI_MIN
);
1344 list_del(&dev
->devlist
);
1345 if (dev
->radio_dev
) {
1346 if (-1 != dev
->radio_dev
->minor
)
1347 video_unregister_device(dev
->radio_dev
);
1349 video_device_release(dev
->radio_dev
);
1350 dev
->radio_dev
= NULL
;
1353 if (-1 != dev
->vbi_dev
->minor
)
1354 video_unregister_device(dev
->vbi_dev
);
1356 video_device_release(dev
->vbi_dev
);
1357 dev
->vbi_dev
= NULL
;
1360 if (-1 != dev
->vdev
->minor
)
1361 video_unregister_device(dev
->vdev
);
1363 video_device_release(dev
->vdev
);
1366 em28xx_i2c_unregister(dev
);
1367 usb_put_dev(dev
->udev
);
1369 /* Mark device as unused */
1370 em28xx_devused
&=~(1<<dev
->devno
);
1374 * em28xx_v4l2_close()
1375 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1377 static int em28xx_v4l2_close(struct inode
*inode
, struct file
*filp
)
1379 struct em28xx_fh
*fh
= filp
->private_data
;
1380 struct em28xx
*dev
= fh
->dev
;
1383 em28xx_videodbg("users=%d\n", dev
->users
);
1389 mutex_lock(&dev
->lock
);
1391 if (dev
->users
== 1) {
1392 em28xx_uninit_isoc(dev
);
1393 em28xx_release_buffers(dev
);
1396 /* the device is already disconnect,
1397 free the remaining resources */
1398 if (dev
->state
& DEV_DISCONNECTED
) {
1399 em28xx_release_resources(dev
);
1400 mutex_unlock(&dev
->lock
);
1405 /* set alternate 0 */
1407 em28xx_videodbg("setting alternate 0\n");
1408 errCode
= usb_set_interface(dev
->udev
, 0, 0);
1410 em28xx_errdev("cannot change alternate number to "
1411 "0 (error=%i)\n", errCode
);
1416 wake_up_interruptible_nr(&dev
->open
, 1);
1417 mutex_unlock(&dev
->lock
);
1422 * em28xx_v4l2_read()
1423 * will allocate buffers when called for the first time
1426 em28xx_v4l2_read(struct file
*filp
, char __user
* buf
, size_t count
,
1429 struct em28xx_frame_t
*f
, *i
;
1430 unsigned long lock_flags
;
1432 struct em28xx_fh
*fh
= filp
->private_data
;
1433 struct em28xx
*dev
= fh
->dev
;
1435 /* FIXME: read() is not prepared to allow changing the video
1436 resolution while streaming. Seems a bug at em28xx_set_fmt
1439 if (unlikely(res_get(fh
) < 0))
1442 mutex_lock(&dev
->lock
);
1444 if (dev
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1445 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1447 if (dev
->type
== V4L2_BUF_TYPE_VBI_CAPTURE
) {
1448 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1449 em28xx_videodbg("not supported yet! ...\n");
1450 if (copy_to_user(buf
, "", 1)) {
1451 mutex_unlock(&dev
->lock
);
1454 mutex_unlock(&dev
->lock
);
1457 if (dev
->type
== V4L2_BUF_TYPE_SLICED_VBI_CAPTURE
) {
1458 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1459 em28xx_videodbg("not supported yet! ...\n");
1460 if (copy_to_user(buf
, "", 1)) {
1461 mutex_unlock(&dev
->lock
);
1464 mutex_unlock(&dev
->lock
);
1468 if (dev
->state
& DEV_DISCONNECTED
) {
1469 em28xx_videodbg("device not present\n");
1470 mutex_unlock(&dev
->lock
);
1474 if (dev
->state
& DEV_MISCONFIGURED
) {
1475 em28xx_videodbg("device misconfigured; close and open it again\n");
1476 mutex_unlock(&dev
->lock
);
1480 if (dev
->io
== IO_MMAP
) {
1481 em28xx_videodbg ("IO method is set to mmap; close and open"
1482 " the device again to choose the read method\n");
1483 mutex_unlock(&dev
->lock
);
1487 if (dev
->io
== IO_NONE
) {
1488 if (!em28xx_request_buffers(dev
, EM28XX_NUM_READ_FRAMES
)) {
1489 em28xx_errdev("read failed, not enough memory\n");
1490 mutex_unlock(&dev
->lock
);
1494 dev
->stream
= STREAM_ON
;
1495 em28xx_queue_unusedframes(dev
);
1499 mutex_unlock(&dev
->lock
);
1503 if (list_empty(&dev
->outqueue
)) {
1504 if (filp
->f_flags
& O_NONBLOCK
) {
1505 mutex_unlock(&dev
->lock
);
1508 ret
= wait_event_interruptible
1510 (!list_empty(&dev
->outqueue
)) ||
1511 (dev
->state
& DEV_DISCONNECTED
));
1513 mutex_unlock(&dev
->lock
);
1516 if (dev
->state
& DEV_DISCONNECTED
) {
1517 mutex_unlock(&dev
->lock
);
1520 dev
->video_bytesread
= 0;
1523 f
= list_entry(dev
->outqueue
.prev
, struct em28xx_frame_t
, frame
);
1525 em28xx_queue_unusedframes(dev
);
1527 if (count
> f
->buf
.length
)
1528 count
= f
->buf
.length
;
1530 if ((dev
->video_bytesread
+ count
) > dev
->frame_size
)
1531 count
= dev
->frame_size
- dev
->video_bytesread
;
1533 if (copy_to_user(buf
, f
->bufmem
+dev
->video_bytesread
, count
)) {
1534 em28xx_err("Error while copying to user\n");
1537 dev
->video_bytesread
+= count
;
1539 if (dev
->video_bytesread
== dev
->frame_size
) {
1540 spin_lock_irqsave(&dev
->queue_lock
, lock_flags
);
1541 list_for_each_entry(i
, &dev
->outqueue
, frame
)
1542 i
->state
= F_UNUSED
;
1543 INIT_LIST_HEAD(&dev
->outqueue
);
1544 spin_unlock_irqrestore(&dev
->queue_lock
, lock_flags
);
1546 em28xx_queue_unusedframes(dev
);
1547 dev
->video_bytesread
= 0;
1552 mutex_unlock(&dev
->lock
);
1558 * em28xx_v4l2_poll()
1559 * will allocate buffers when called for the first time
1561 static unsigned int em28xx_v4l2_poll(struct file
*filp
, poll_table
* wait
)
1563 unsigned int mask
= 0;
1564 struct em28xx_fh
*fh
= filp
->private_data
;
1565 struct em28xx
*dev
= fh
->dev
;
1567 if (unlikely(res_get(fh
) < 0))
1570 mutex_lock(&dev
->lock
);
1572 if (dev
->state
& DEV_DISCONNECTED
) {
1573 em28xx_videodbg("device not present\n");
1574 } else if (dev
->state
& DEV_MISCONFIGURED
) {
1575 em28xx_videodbg("device is misconfigured; close and open it again\n");
1577 if (dev
->io
== IO_NONE
) {
1578 if (!em28xx_request_buffers
1579 (dev
, EM28XX_NUM_READ_FRAMES
)) {
1581 ("poll() failed, not enough memory\n");
1584 dev
->stream
= STREAM_ON
;
1588 if (dev
->io
== IO_READ
) {
1589 em28xx_queue_unusedframes(dev
);
1590 poll_wait(filp
, &dev
->wait_frame
, wait
);
1592 if (!list_empty(&dev
->outqueue
))
1593 mask
|= POLLIN
| POLLRDNORM
;
1595 mutex_unlock(&dev
->lock
);
1601 mutex_unlock(&dev
->lock
);
1606 * em28xx_v4l2_mmap()
1608 static int em28xx_v4l2_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
1610 struct em28xx_fh
*fh
= filp
->private_data
;
1611 struct em28xx
*dev
= fh
->dev
;
1612 unsigned long size
= vma
->vm_end
- vma
->vm_start
;
1613 unsigned long start
= vma
->vm_start
;
1617 if (unlikely(res_get(fh
) < 0))
1620 mutex_lock(&dev
->lock
);
1622 if (dev
->state
& DEV_DISCONNECTED
) {
1623 em28xx_videodbg("mmap: device not present\n");
1624 mutex_unlock(&dev
->lock
);
1628 if (dev
->state
& DEV_MISCONFIGURED
) {
1629 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1631 mutex_unlock(&dev
->lock
);
1635 if (dev
->io
!= IO_MMAP
|| !(vma
->vm_flags
& VM_WRITE
)) {
1636 mutex_unlock(&dev
->lock
);
1640 if (size
> PAGE_ALIGN(dev
->frame
[0].buf
.length
))
1641 size
= PAGE_ALIGN(dev
->frame
[0].buf
.length
);
1643 for (i
= 0; i
< dev
->num_frames
; i
++) {
1644 if ((dev
->frame
[i
].buf
.m
.offset
>> PAGE_SHIFT
) == vma
->vm_pgoff
)
1647 if (i
== dev
->num_frames
) {
1648 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1649 mutex_unlock(&dev
->lock
);
1653 /* VM_IO is eventually going to replace PageReserved altogether */
1654 vma
->vm_flags
|= VM_IO
;
1655 vma
->vm_flags
|= VM_RESERVED
; /* avoid to swap out this VMA */
1657 pos
= dev
->frame
[i
].bufmem
;
1658 while (size
> 0) { /* size is page-aligned */
1659 if (vm_insert_page(vma
, start
, vmalloc_to_page(pos
))) {
1660 em28xx_videodbg("mmap: vm_insert_page failed\n");
1661 mutex_unlock(&dev
->lock
);
1669 vma
->vm_ops
= &em28xx_vm_ops
;
1670 vma
->vm_private_data
= &dev
->frame
[i
];
1672 em28xx_vm_open(vma
);
1673 mutex_unlock(&dev
->lock
);
1677 static const struct file_operations em28xx_v4l_fops
= {
1678 .owner
= THIS_MODULE
,
1679 .open
= em28xx_v4l2_open
,
1680 .release
= em28xx_v4l2_close
,
1681 .read
= em28xx_v4l2_read
,
1682 .poll
= em28xx_v4l2_poll
,
1683 .mmap
= em28xx_v4l2_mmap
,
1684 .ioctl
= video_ioctl2
,
1685 .llseek
= no_llseek
,
1686 .compat_ioctl
= v4l_compat_ioctl32
,
1689 static const struct file_operations radio_fops
= {
1690 .owner
= THIS_MODULE
,
1691 .open
= em28xx_v4l2_open
,
1692 .release
= em28xx_v4l2_close
,
1693 .ioctl
= video_ioctl2
,
1694 .compat_ioctl
= v4l_compat_ioctl32
,
1695 .llseek
= no_llseek
,
1698 static const struct video_device em28xx_video_template
= {
1699 .fops
= &em28xx_v4l_fops
,
1700 .release
= video_device_release
,
1703 .vidioc_querycap
= vidioc_querycap
,
1704 .vidioc_enum_fmt_cap
= vidioc_enum_fmt_cap
,
1705 .vidioc_g_fmt_cap
= vidioc_g_fmt_cap
,
1706 .vidioc_try_fmt_cap
= vidioc_try_fmt_cap
,
1707 .vidioc_s_fmt_cap
= vidioc_s_fmt_cap
,
1708 .vidioc_g_audio
= vidioc_g_audio
,
1709 .vidioc_s_audio
= vidioc_s_audio
,
1710 .vidioc_cropcap
= vidioc_cropcap
,
1712 .vidioc_g_fmt_vbi_capture
= vidioc_g_fmt_vbi_capture
,
1713 .vidioc_try_fmt_vbi_capture
= vidioc_try_set_vbi_capture
,
1714 .vidioc_s_fmt_vbi_capture
= vidioc_try_set_vbi_capture
,
1716 .vidioc_reqbufs
= vidioc_reqbufs
,
1717 .vidioc_querybuf
= vidioc_querybuf
,
1718 .vidioc_qbuf
= vidioc_qbuf
,
1719 .vidioc_dqbuf
= vidioc_dqbuf
,
1720 .vidioc_s_std
= vidioc_s_std
,
1721 .vidioc_enum_input
= vidioc_enum_input
,
1722 .vidioc_g_input
= vidioc_g_input
,
1723 .vidioc_s_input
= vidioc_s_input
,
1724 .vidioc_queryctrl
= vidioc_queryctrl
,
1725 .vidioc_g_ctrl
= vidioc_g_ctrl
,
1726 .vidioc_s_ctrl
= vidioc_s_ctrl
,
1727 .vidioc_streamon
= vidioc_streamon
,
1728 .vidioc_streamoff
= vidioc_streamoff
,
1729 .vidioc_g_tuner
= vidioc_g_tuner
,
1730 .vidioc_s_tuner
= vidioc_s_tuner
,
1731 .vidioc_g_frequency
= vidioc_g_frequency
,
1732 .vidioc_s_frequency
= vidioc_s_frequency
,
1734 .tvnorms
= V4L2_STD_ALL
,
1735 .current_norm
= V4L2_STD_PAL
,
1738 static struct video_device em28xx_radio_template
= {
1739 .name
= "em28xx-radio",
1740 .type
= VID_TYPE_TUNER
,
1741 .fops
= &radio_fops
,
1743 .vidioc_querycap
= radio_querycap
,
1744 .vidioc_g_tuner
= radio_g_tuner
,
1745 .vidioc_enum_input
= radio_enum_input
,
1746 .vidioc_g_audio
= radio_g_audio
,
1747 .vidioc_s_tuner
= radio_s_tuner
,
1748 .vidioc_s_audio
= radio_s_audio
,
1749 .vidioc_s_input
= radio_s_input
,
1750 .vidioc_queryctrl
= radio_queryctrl
,
1751 .vidioc_g_ctrl
= vidioc_g_ctrl
,
1752 .vidioc_s_ctrl
= vidioc_s_ctrl
,
1753 .vidioc_g_frequency
= vidioc_g_frequency
,
1754 .vidioc_s_frequency
= vidioc_s_frequency
,
1757 /******************************** usb interface *****************************************/
1760 static LIST_HEAD(em28xx_extension_devlist
);
1761 static DEFINE_MUTEX(em28xx_extension_devlist_lock
);
1763 int em28xx_register_extension(struct em28xx_ops
*ops
)
1765 struct em28xx
*h
, *dev
= NULL
;
1767 list_for_each_entry(h
, &em28xx_devlist
, devlist
)
1770 mutex_lock(&em28xx_extension_devlist_lock
);
1771 list_add_tail(&ops
->next
, &em28xx_extension_devlist
);
1775 printk(KERN_INFO
"Em28xx: Initialized (%s) extension\n", ops
->name
);
1776 mutex_unlock(&em28xx_extension_devlist_lock
);
1780 EXPORT_SYMBOL(em28xx_register_extension
);
1782 void em28xx_unregister_extension(struct em28xx_ops
*ops
)
1784 struct em28xx
*h
, *dev
= NULL
;
1786 list_for_each_entry(h
, &em28xx_devlist
, devlist
)
1792 mutex_lock(&em28xx_extension_devlist_lock
);
1793 printk(KERN_INFO
"Em28xx: Removed (%s) extension\n", ops
->name
);
1794 list_del(&ops
->next
);
1795 mutex_unlock(&em28xx_extension_devlist_lock
);
1797 EXPORT_SYMBOL(em28xx_unregister_extension
);
1799 struct video_device
*em28xx_vdev_init(struct em28xx
*dev
,
1800 const struct video_device
*template,
1802 const char *type_name
)
1804 struct video_device
*vfd
;
1806 vfd
= video_device_alloc();
1811 vfd
->dev
= &dev
->udev
->dev
;
1812 vfd
->release
= video_device_release
;
1815 snprintf(vfd
->name
, sizeof(vfd
->name
), "%s %s",
1816 dev
->name
, type_name
);
1824 * allocates and inits the device structs, registers i2c bus and v4l device
1826 static int em28xx_init_dev(struct em28xx
**devhandle
, struct usb_device
*udev
,
1829 struct em28xx_ops
*ops
= NULL
;
1830 struct em28xx
*dev
= *devhandle
;
1831 int retval
= -ENOMEM
;
1833 unsigned int maxh
, maxw
;
1836 mutex_init(&dev
->lock
);
1837 spin_lock_init(&dev
->queue_lock
);
1838 init_waitqueue_head(&dev
->open
);
1839 init_waitqueue_head(&dev
->wait_frame
);
1840 init_waitqueue_head(&dev
->wait_stream
);
1842 dev
->em28xx_write_regs
= em28xx_write_regs
;
1843 dev
->em28xx_read_reg
= em28xx_read_reg
;
1844 dev
->em28xx_read_reg_req_len
= em28xx_read_reg_req_len
;
1845 dev
->em28xx_write_regs_req
= em28xx_write_regs_req
;
1846 dev
->em28xx_read_reg_req
= em28xx_read_reg_req
;
1847 dev
->is_em2800
= em28xx_boards
[dev
->model
].is_em2800
;
1849 errCode
= em28xx_read_reg(dev
, CHIPID_REG
);
1851 em28xx_info("em28xx chip ID = %d\n", errCode
);
1853 em28xx_pre_card_setup(dev
);
1855 errCode
= em28xx_config(dev
);
1857 em28xx_errdev("error configuring device\n");
1858 em28xx_devused
&= ~(1<<dev
->devno
);
1863 /* register i2c bus */
1864 em28xx_i2c_register(dev
);
1866 /* Do board specific init and eeprom reading */
1867 em28xx_card_setup(dev
);
1869 /* Configure audio */
1870 em28xx_audio_analog_set(dev
);
1872 /* configure the device */
1873 em28xx_config_i2c(dev
);
1875 /* set default norm */
1876 dev
->norm
= em28xx_video_template
.current_norm
;
1878 maxw
= norm_maxw(dev
);
1879 maxh
= norm_maxh(dev
);
1881 /* set default image size */
1884 dev
->interlaced
= EM28XX_INTERLACED_DEFAULT
;
1885 dev
->field_size
= dev
->width
* dev
->height
;
1887 dev
->interlaced
? dev
->field_size
<< 1 : dev
->field_size
;
1888 dev
->bytesperline
= dev
->width
* 2;
1893 errCode
= em28xx_config(dev
);
1895 list_add_tail(&dev
->devlist
, &em28xx_devlist
);
1897 /* allocate and fill video video_device struct */
1898 dev
->vdev
= em28xx_vdev_init(dev
, &em28xx_video_template
,
1899 VID_TYPE_CAPTURE
, "video");
1900 if (NULL
== dev
->vdev
) {
1901 em28xx_errdev("cannot allocate video_device.\n");
1904 if (dev
->tuner_type
!= TUNER_ABSENT
)
1905 dev
->vdev
->type
|= VID_TYPE_TUNER
;
1907 /* register v4l2 video video_device */
1908 retval
= video_register_device(dev
->vdev
, VFL_TYPE_GRABBER
,
1909 video_nr
[dev
->devno
]);
1911 em28xx_errdev("unable to register video device (error=%i).\n",
1916 /* Allocate and fill vbi video_device struct */
1917 dev
->vbi_dev
= em28xx_vdev_init(dev
, &em28xx_video_template
,
1918 VFL_TYPE_VBI
, "vbi");
1919 /* register v4l2 vbi video_device */
1920 if (video_register_device(dev
->vbi_dev
, VFL_TYPE_VBI
,
1921 vbi_nr
[dev
->devno
]) < 0) {
1922 em28xx_errdev("unable to register vbi device\n");
1927 if (em28xx_boards
[dev
->model
].radio
.type
== EM28XX_RADIO
) {
1928 dev
->radio_dev
= em28xx_vdev_init(dev
, &em28xx_radio_template
,
1929 VFL_TYPE_RADIO
, "radio");
1930 if (NULL
== dev
->radio_dev
) {
1931 em28xx_errdev("cannot allocate video_device.\n");
1934 retval
= video_register_device(dev
->radio_dev
, VFL_TYPE_RADIO
,
1935 radio_nr
[dev
->devno
]);
1937 em28xx_errdev("can't register radio device\n");
1940 em28xx_info("Registered radio device as /dev/radio%d\n",
1941 dev
->radio_dev
->minor
& 0x1f);
1945 if (dev
->has_msp34xx
) {
1946 /* Send a reset to other chips via gpio */
1947 em28xx_write_regs_req(dev
, 0x00, 0x08, "\xf7", 1);
1949 em28xx_write_regs_req(dev
, 0x00, 0x08, "\xff", 1);
1955 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1956 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
,
1957 dev
->vbi_dev
->minor
-MINOR_VFL_TYPE_VBI_MIN
);
1959 mutex_lock(&em28xx_extension_devlist_lock
);
1960 if (!list_empty(&em28xx_extension_devlist
)) {
1961 list_for_each_entry(ops
, &em28xx_extension_devlist
, next
) {
1966 mutex_unlock(&em28xx_extension_devlist_lock
);
1971 em28xx_release_resources(dev
);
1972 mutex_unlock(&dev
->lock
);
1977 #if defined(CONFIG_MODULES) && defined(MODULE)
1978 static void request_module_async(struct work_struct
*work
)
1980 struct em28xx
*dev
= container_of(work
,
1981 struct em28xx
, request_module_wk
);
1983 if (dev
->has_audio_class
)
1984 request_module("snd-usb-audio");
1986 request_module("em28xx-alsa");
1989 static void request_modules(struct em28xx
*dev
)
1991 INIT_WORK(&dev
->request_module_wk
, request_module_async
);
1992 schedule_work(&dev
->request_module_wk
);
1995 #define request_modules(dev)
1996 #endif /* CONFIG_MODULES */
1999 * em28xx_usb_probe()
2000 * checks for supported devices
2002 static int em28xx_usb_probe(struct usb_interface
*interface
,
2003 const struct usb_device_id
*id
)
2005 const struct usb_endpoint_descriptor
*endpoint
;
2006 struct usb_device
*udev
;
2007 struct usb_interface
*uif
;
2008 struct em28xx
*dev
= NULL
;
2009 int retval
= -ENODEV
;
2012 udev
= usb_get_dev(interface_to_usbdev(interface
));
2013 ifnum
= interface
->altsetting
[0].desc
.bInterfaceNumber
;
2015 /* Check to see next free device and mark as used */
2016 nr
=find_first_zero_bit(&em28xx_devused
,EM28XX_MAXBOARDS
);
2017 em28xx_devused
|=1<<nr
;
2019 /* Don't register audio interfaces */
2020 if (interface
->altsetting
[0].desc
.bInterfaceClass
== USB_CLASS_AUDIO
) {
2021 em28xx_err(DRIVER_NAME
" audio device (%04x:%04x): interface %i, class %i\n",
2022 udev
->descriptor
.idVendor
,udev
->descriptor
.idProduct
,
2024 interface
->altsetting
[0].desc
.bInterfaceClass
);
2026 em28xx_devused
&=~(1<<nr
);
2030 em28xx_err(DRIVER_NAME
" new video device (%04x:%04x): interface %i, class %i\n",
2031 udev
->descriptor
.idVendor
,udev
->descriptor
.idProduct
,
2033 interface
->altsetting
[0].desc
.bInterfaceClass
);
2035 endpoint
= &interface
->cur_altsetting
->endpoint
[1].desc
;
2037 /* check if the device has the iso in endpoint at the correct place */
2038 if ((endpoint
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
2039 USB_ENDPOINT_XFER_ISOC
) {
2040 em28xx_err(DRIVER_NAME
" probing error: endpoint is non-ISO endpoint!\n");
2041 em28xx_devused
&=~(1<<nr
);
2044 if ((endpoint
->bEndpointAddress
& USB_ENDPOINT_DIR_MASK
) == USB_DIR_OUT
) {
2045 em28xx_err(DRIVER_NAME
" probing error: endpoint is ISO OUT endpoint!\n");
2046 em28xx_devused
&=~(1<<nr
);
2050 if (nr
>= EM28XX_MAXBOARDS
) {
2051 printk (DRIVER_NAME
": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS
);
2052 em28xx_devused
&=~(1<<nr
);
2056 /* allocate memory for our device state and initialize it */
2057 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
2059 em28xx_err(DRIVER_NAME
": out of memory!\n");
2060 em28xx_devused
&=~(1<<nr
);
2064 snprintf(dev
->name
, 29, "em28xx #%d", nr
);
2066 dev
->model
= id
->driver_info
;
2068 /* Checks if audio is provided by some interface */
2069 for (i
= 0; i
< udev
->config
->desc
.bNumInterfaces
; i
++) {
2070 uif
= udev
->config
->interface
[i
];
2071 if (uif
->altsetting
[0].desc
.bInterfaceClass
== USB_CLASS_AUDIO
) {
2072 dev
->has_audio_class
= 1;
2077 printk(KERN_INFO DRIVER_NAME
" %s usb audio class\n",
2078 dev
->has_audio_class
? "Has" : "Doesn't have");
2080 /* compute alternate max packet sizes */
2081 uif
= udev
->actconfig
->interface
[0];
2083 dev
->num_alt
=uif
->num_altsetting
;
2084 em28xx_info("Alternate settings: %i\n",dev
->num_alt
);
2085 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
2086 dev
->alt_max_pkt_size
= kmalloc(32*
2087 dev
->num_alt
,GFP_KERNEL
);
2088 if (dev
->alt_max_pkt_size
== NULL
) {
2089 em28xx_errdev("out of memory!\n");
2090 em28xx_devused
&=~(1<<nr
);
2095 for (i
= 0; i
< dev
->num_alt
; i
++) {
2096 u16 tmp
= le16_to_cpu(uif
->altsetting
[i
].endpoint
[1].desc
.
2098 dev
->alt_max_pkt_size
[i
] =
2099 (tmp
& 0x07ff) * (((tmp
& 0x1800) >> 11) + 1);
2100 em28xx_info("Alternate setting %i, max size= %i\n",i
,
2101 dev
->alt_max_pkt_size
[i
]);
2104 if ((card
[nr
]>=0)&&(card
[nr
]<em28xx_bcount
))
2105 dev
->model
= card
[nr
];
2107 /* allocate device struct */
2108 retval
= em28xx_init_dev(&dev
, udev
, nr
);
2112 em28xx_info("Found %s\n", em28xx_boards
[dev
->model
].name
);
2114 /* save our data pointer in this interface device */
2115 usb_set_intfdata(interface
, dev
);
2117 request_modules(dev
);
2123 * em28xx_usb_disconnect()
2124 * called when the device gets diconencted
2125 * video device will be unregistered on v4l2_close in case it is still open
2127 static void em28xx_usb_disconnect(struct usb_interface
*interface
)
2130 struct em28xx_ops
*ops
= NULL
;
2132 dev
= usb_get_intfdata(interface
);
2133 usb_set_intfdata(interface
, NULL
);
2138 em28xx_info("disconnecting %s\n", dev
->vdev
->name
);
2140 /* wait until all current v4l2 io is finished then deallocate resources */
2141 mutex_lock(&dev
->lock
);
2143 wake_up_interruptible_all(&dev
->open
);
2147 ("device /dev/video%d is open! Deregistration and memory "
2148 "deallocation are deferred on close.\n",
2149 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
);
2151 dev
->state
|= DEV_MISCONFIGURED
;
2152 em28xx_uninit_isoc(dev
);
2153 dev
->state
|= DEV_DISCONNECTED
;
2154 wake_up_interruptible(&dev
->wait_frame
);
2155 wake_up_interruptible(&dev
->wait_stream
);
2157 dev
->state
|= DEV_DISCONNECTED
;
2158 em28xx_release_resources(dev
);
2160 mutex_unlock(&dev
->lock
);
2162 mutex_lock(&em28xx_extension_devlist_lock
);
2163 if (!list_empty(&em28xx_extension_devlist
)) {
2164 list_for_each_entry(ops
, &em28xx_extension_devlist
, next
) {
2168 mutex_unlock(&em28xx_extension_devlist_lock
);
2171 kfree(dev
->alt_max_pkt_size
);
2176 static struct usb_driver em28xx_usb_driver
= {
2178 .probe
= em28xx_usb_probe
,
2179 .disconnect
= em28xx_usb_disconnect
,
2180 .id_table
= em28xx_id_table
,
2183 static int __init
em28xx_module_init(void)
2187 printk(KERN_INFO DRIVER_NAME
" v4l2 driver version %d.%d.%d loaded\n",
2188 (EM28XX_VERSION_CODE
>> 16) & 0xff,
2189 (EM28XX_VERSION_CODE
>> 8) & 0xff, EM28XX_VERSION_CODE
& 0xff);
2191 printk(KERN_INFO DRIVER_NAME
" snapshot date %04d-%02d-%02d\n",
2192 SNAPSHOT
/ 10000, (SNAPSHOT
/ 100) % 100, SNAPSHOT
% 100);
2195 /* register this driver with the USB subsystem */
2196 result
= usb_register(&em28xx_usb_driver
);
2198 em28xx_err(DRIVER_NAME
2199 " usb_register failed. Error number %d.\n", result
);
2204 static void __exit
em28xx_module_exit(void)
2206 /* deregister this driver with the USB subsystem */
2207 usb_deregister(&em28xx_usb_driver
);
2210 module_init(em28xx_module_init
);
2211 module_exit(em28xx_module_exit
);