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>
42 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
43 "Markus Rechberger <mrechberger@gmail.com>, " \
44 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
45 "Sascha Sommer <saschasommer@freenet.de>"
47 #define DRIVER_NAME "em28xx"
48 #define DRIVER_DESC "Empia em28xx based USB video device driver"
49 #define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 0)
51 #define em28xx_videodbg(fmt, arg...) do {\
53 printk(KERN_INFO "%s %s :"fmt, \
54 dev->name, __FUNCTION__ , ##arg); } while (0)
56 MODULE_AUTHOR(DRIVER_AUTHOR
);
57 MODULE_DESCRIPTION(DRIVER_DESC
);
58 MODULE_LICENSE("GPL");
60 static LIST_HEAD(em28xx_devlist
);
62 static unsigned int card
[] = {[0 ... (EM28XX_MAXBOARDS
- 1)] = UNSET
};
63 static unsigned int video_nr
[] = {[0 ... (EM28XX_MAXBOARDS
- 1)] = UNSET
};
64 static unsigned int vbi_nr
[] = {[0 ... (EM28XX_MAXBOARDS
- 1)] = UNSET
};
65 module_param_array(card
, int, NULL
, 0444);
66 module_param_array(video_nr
, int, NULL
, 0444);
67 module_param_array(vbi_nr
, int, NULL
, 0444);
68 MODULE_PARM_DESC(card
,"card type");
69 MODULE_PARM_DESC(video_nr
,"video device numbers");
70 MODULE_PARM_DESC(vbi_nr
,"vbi device numbers");
72 static unsigned int video_debug
= 0;
73 module_param(video_debug
,int,0644);
74 MODULE_PARM_DESC(video_debug
,"enable debug messages [video]");
76 /* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
77 static unsigned long em28xx_devused
;
79 /* supported controls */
80 /* Common to all boards */
81 static struct v4l2_queryctrl em28xx_qctrl
[] = {
83 .id
= V4L2_CID_AUDIO_VOLUME
,
84 .type
= V4L2_CTRL_TYPE_INTEGER
,
89 .default_value
= 0x1f,
92 .id
= V4L2_CID_AUDIO_MUTE
,
93 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
103 static struct usb_driver em28xx_usb_driver
;
106 /********************* v4l2 interface ******************************************/
110 * inits registers with sane defaults
112 static int em28xx_config(struct em28xx
*dev
)
115 /* Sets I2C speed to 100 KHz */
117 em28xx_write_regs_req(dev
, 0x00, 0x06, "\x40", 1);
119 /* enable vbi capturing */
121 /* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
122 /* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
123 em28xx_write_regs_req(dev
,0x00,0x11,"\x51",1);
125 dev
->mute
= 1; /* maybe not the right place... */
128 em28xx_outfmt_set_yuv422(dev
);
129 em28xx_colorlevels_set_default(dev
);
130 em28xx_compression_disable(dev
);
136 * em28xx_config_i2c()
137 * configure i2c attached devices
139 static void em28xx_config_i2c(struct em28xx
*dev
)
141 struct v4l2_routing route
;
143 route
.input
= INPUT(dev
->ctl_input
)->vmux
;
145 em28xx_i2c_call_clients(dev
, VIDIOC_INT_RESET
, NULL
);
146 em28xx_i2c_call_clients(dev
, VIDIOC_INT_S_VIDEO_ROUTING
, &route
);
147 em28xx_i2c_call_clients(dev
, VIDIOC_STREAMON
, NULL
);
151 * em28xx_empty_framequeues()
152 * prepare queues for incoming and outgoing frames
154 static void em28xx_empty_framequeues(struct em28xx
*dev
)
158 INIT_LIST_HEAD(&dev
->inqueue
);
159 INIT_LIST_HEAD(&dev
->outqueue
);
161 for (i
= 0; i
< EM28XX_NUM_FRAMES
; i
++) {
162 dev
->frame
[i
].state
= F_UNUSED
;
163 dev
->frame
[i
].buf
.bytesused
= 0;
167 static void video_mux(struct em28xx
*dev
, int index
)
169 struct v4l2_routing route
;
171 route
.input
= INPUT(index
)->vmux
;
173 dev
->ctl_input
= index
;
174 dev
->ctl_ainput
= INPUT(index
)->amux
;
176 em28xx_i2c_call_clients(dev
, VIDIOC_INT_S_VIDEO_ROUTING
, &route
);
178 if (dev
->has_msp34xx
) {
180 em28xx_i2c_call_clients(dev
, VIDIOC_INT_I2S_CLOCK_FREQ
, &dev
->i2s_speed
);
181 route
.input
= dev
->ctl_ainput
;
182 route
.output
= MSP_OUTPUT(MSP_SC_IN_DSP_SCART1
);
183 /* Note: this is msp3400 specific */
184 em28xx_i2c_call_clients(dev
, VIDIOC_INT_S_AUDIO_ROUTING
, &route
);
187 em28xx_set_audio_source(dev
);
190 /* Usage lock check functions */
191 static int res_get(struct em28xx_fh
*fh
)
193 struct em28xx
*dev
= fh
->dev
;
196 /* This instance already has stream_on */
200 mutex_lock(&dev
->lock
);
209 mutex_unlock(&dev
->lock
);
213 static int res_check(struct em28xx_fh
*fh
)
215 return (fh
->stream_on
);
218 static void res_free(struct em28xx_fh
*fh
)
220 struct em28xx
*dev
= fh
->dev
;
222 mutex_lock(&dev
->lock
);
225 mutex_unlock(&dev
->lock
);
231 static void em28xx_vm_open(struct vm_area_struct
*vma
)
233 struct em28xx_frame_t
*f
= vma
->vm_private_data
;
240 static void em28xx_vm_close(struct vm_area_struct
*vma
)
242 /* NOTE: buffers are not freed here */
243 struct em28xx_frame_t
*f
= vma
->vm_private_data
;
245 if (f
->vma_use_count
)
249 static struct vm_operations_struct em28xx_vm_ops
= {
250 .open
= em28xx_vm_open
,
251 .close
= em28xx_vm_close
,
257 * return the current saturation, brightness or contrast, mute state
259 static int em28xx_get_ctrl(struct em28xx
*dev
, struct v4l2_control
*ctrl
)
262 case V4L2_CID_AUDIO_MUTE
:
263 ctrl
->value
= dev
->mute
;
265 case V4L2_CID_AUDIO_VOLUME
:
266 ctrl
->value
= dev
->volume
;
275 * mute or set new saturation, brightness or contrast
277 static int em28xx_set_ctrl(struct em28xx
*dev
, const struct v4l2_control
*ctrl
)
280 case V4L2_CID_AUDIO_MUTE
:
281 if (ctrl
->value
!= dev
->mute
) {
282 dev
->mute
= ctrl
->value
;
283 return em28xx_audio_analog_set(dev
);
286 case V4L2_CID_AUDIO_VOLUME
:
287 dev
->volume
= ctrl
->value
;
288 return em28xx_audio_analog_set(dev
);
295 * em28xx_stream_interrupt()
298 static int em28xx_stream_interrupt(struct em28xx
*dev
)
302 /* stop reading from the device */
304 dev
->stream
= STREAM_INTERRUPT
;
305 rc
= wait_event_timeout(dev
->wait_stream
,
306 (dev
->stream
== STREAM_OFF
) ||
307 (dev
->state
& DEV_DISCONNECTED
),
311 dev
->state
|= DEV_MISCONFIGURED
;
312 em28xx_videodbg("device is misconfigured; close and "
313 "open /dev/video%d again\n",
314 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
);
322 static int check_dev(struct em28xx
*dev
)
324 if (dev
->state
& DEV_DISCONNECTED
) {
325 em28xx_errdev("v4l2 ioctl: device not present\n");
329 if (dev
->state
& DEV_MISCONFIGURED
) {
330 em28xx_errdev("v4l2 ioctl: device is misconfigured; "
331 "close and open it again\n");
337 static void get_scale(struct em28xx
*dev
,
338 unsigned int width
, unsigned int height
,
339 unsigned int *hscale
, unsigned int *vscale
)
341 unsigned int maxw
= norm_maxw(dev
);
342 unsigned int maxh
= norm_maxh(dev
);
344 *hscale
= (((unsigned long)maxw
) << 12) / width
- 4096L;
345 if (*hscale
>= 0x4000)
348 *vscale
= (((unsigned long)maxh
) << 12) / height
- 4096L;
349 if (*vscale
>= 0x4000)
353 /* ------------------------------------------------------------------
354 IOCTL vidioc handling
355 ------------------------------------------------------------------*/
357 static int vidioc_g_fmt_cap(struct file
*file
, void *priv
,
358 struct v4l2_format
*f
)
360 struct em28xx_fh
*fh
= priv
;
361 struct em28xx
*dev
= fh
->dev
;
363 mutex_lock(&dev
->lock
);
365 f
->fmt
.pix
.width
= dev
->width
;
366 f
->fmt
.pix
.height
= dev
->height
;
367 f
->fmt
.pix
.pixelformat
= V4L2_PIX_FMT_YUYV
;
368 f
->fmt
.pix
.bytesperline
= dev
->bytesperline
;
369 f
->fmt
.pix
.sizeimage
= dev
->frame_size
;
370 f
->fmt
.pix
.colorspace
= V4L2_COLORSPACE_SMPTE170M
;
372 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
373 f
->fmt
.pix
.field
= dev
->interlaced
?
374 V4L2_FIELD_INTERLACED
: V4L2_FIELD_TOP
;
376 mutex_unlock(&dev
->lock
);
380 static int vidioc_try_fmt_cap(struct file
*file
, void *priv
,
381 struct v4l2_format
*f
)
383 struct em28xx_fh
*fh
= priv
;
384 struct em28xx
*dev
= fh
->dev
;
385 int width
= f
->fmt
.pix
.width
;
386 int height
= f
->fmt
.pix
.height
;
387 unsigned int maxw
= norm_maxw(dev
);
388 unsigned int maxh
= norm_maxh(dev
);
389 unsigned int hscale
, vscale
;
391 /* width must even because of the YUYV format
392 height must be even because of interlacing */
405 mutex_lock(&dev
->lock
);
407 if (dev
->is_em2800
) {
408 /* the em2800 can only scale down to 50% */
409 if (height
% (maxh
/ 2))
411 if (width
% (maxw
/ 2))
413 /* according to empiatech support */
414 /* the MaxPacketSize is to small to support */
415 /* framesizes larger than 640x480 @ 30 fps */
416 /* or 640x576 @ 25 fps. As this would cut */
417 /* of a part of the image we prefer */
418 /* 360x576 or 360x480 for now */
419 if (width
== maxw
&& height
== maxh
)
423 get_scale(dev
, width
, height
, &hscale
, &vscale
);
425 width
= (((unsigned long)maxw
) << 12) / (hscale
+ 4096L);
426 height
= (((unsigned long)maxh
) << 12) / (vscale
+ 4096L);
428 f
->fmt
.pix
.width
= width
;
429 f
->fmt
.pix
.height
= height
;
430 f
->fmt
.pix
.pixelformat
= V4L2_PIX_FMT_YUYV
;
431 f
->fmt
.pix
.bytesperline
= width
* 2;
432 f
->fmt
.pix
.sizeimage
= width
* 2 * height
;
433 f
->fmt
.pix
.colorspace
= V4L2_COLORSPACE_SMPTE170M
;
434 f
->fmt
.pix
.field
= V4L2_FIELD_INTERLACED
;
436 mutex_unlock(&dev
->lock
);
440 static int vidioc_s_fmt_cap(struct file
*file
, void *priv
,
441 struct v4l2_format
*f
)
443 struct em28xx_fh
*fh
= priv
;
444 struct em28xx
*dev
= fh
->dev
;
451 vidioc_try_fmt_cap(file
, priv
, f
);
453 mutex_lock(&dev
->lock
);
455 for (i
= 0; i
< dev
->num_frames
; i
++)
456 if (dev
->frame
[i
].vma_use_count
) {
457 em28xx_videodbg("VIDIOC_S_FMT failed. "
458 "Unmap the buffers first.\n");
463 /* stop io in case it is already in progress */
464 if (dev
->stream
== STREAM_ON
) {
465 em28xx_videodbg("VIDIOC_SET_FMT: interrupting stream\n");
466 rc
= em28xx_stream_interrupt(dev
);
471 em28xx_release_buffers(dev
);
474 /* set new image size */
475 dev
->width
= f
->fmt
.pix
.width
;
476 dev
->height
= f
->fmt
.pix
.height
;
477 dev
->frame_size
= dev
->width
* dev
->height
* 2;
478 dev
->field_size
= dev
->frame_size
>> 1;
479 dev
->bytesperline
= dev
->width
* 2;
480 get_scale(dev
, dev
->width
, dev
->height
, &dev
->hscale
, &dev
->vscale
);
482 /* FIXME: This is really weird! Why capture is starting with
485 em28xx_uninit_isoc(dev
);
486 em28xx_set_alternate(dev
);
487 em28xx_capture_start(dev
, 1);
488 em28xx_resolution_set(dev
);
489 em28xx_init_isoc(dev
);
493 mutex_unlock(&dev
->lock
);
497 static int vidioc_s_std(struct file
*file
, void *priv
, v4l2_std_id
*norm
)
499 struct em28xx_fh
*fh
= priv
;
500 struct em28xx
*dev
= fh
->dev
;
501 struct v4l2_format f
;
508 mutex_lock(&dev
->lock
);
510 mutex_unlock(&dev
->lock
);
512 /* Adjusts width/height, if needed */
513 f
.fmt
.pix
.width
= dev
->width
;
514 f
.fmt
.pix
.height
= dev
->height
;
515 vidioc_try_fmt_cap(file
, priv
, &f
);
517 mutex_lock(&dev
->lock
);
519 /* set new image size */
520 dev
->width
= f
.fmt
.pix
.width
;
521 dev
->height
= f
.fmt
.pix
.height
;
522 dev
->frame_size
= dev
->width
* dev
->height
* 2;
523 dev
->field_size
= dev
->frame_size
>> 1;
524 dev
->bytesperline
= dev
->width
* 2;
525 get_scale(dev
, dev
->width
, dev
->height
, &dev
->hscale
, &dev
->vscale
);
527 em28xx_resolution_set(dev
);
528 em28xx_i2c_call_clients(dev
, VIDIOC_S_STD
, &dev
->norm
);
530 mutex_unlock(&dev
->lock
);
534 static const char *iname
[] = {
535 [EM28XX_VMUX_COMPOSITE1
] = "Composite1",
536 [EM28XX_VMUX_COMPOSITE2
] = "Composite2",
537 [EM28XX_VMUX_COMPOSITE3
] = "Composite3",
538 [EM28XX_VMUX_COMPOSITE4
] = "Composite4",
539 [EM28XX_VMUX_SVIDEO
] = "S-Video",
540 [EM28XX_VMUX_TELEVISION
] = "Television",
541 [EM28XX_VMUX_CABLE
] = "Cable TV",
542 [EM28XX_VMUX_DVB
] = "DVB",
543 [EM28XX_VMUX_DEBUG
] = "for debug only",
546 static int vidioc_enum_input(struct file
*file
, void *priv
,
547 struct v4l2_input
*i
)
549 struct em28xx_fh
*fh
= priv
;
550 struct em28xx
*dev
= fh
->dev
;
554 if (n
>= MAX_EM28XX_INPUT
)
556 if (0 == INPUT(n
)->type
)
560 i
->type
= V4L2_INPUT_TYPE_CAMERA
;
562 strcpy(i
->name
, iname
[INPUT(n
)->type
]);
564 if ((EM28XX_VMUX_TELEVISION
== INPUT(n
)->type
) ||
565 (EM28XX_VMUX_CABLE
== INPUT(n
)->type
))
566 i
->type
= V4L2_INPUT_TYPE_TUNER
;
568 i
->std
= dev
->vdev
->tvnorms
;
573 static int vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
575 struct em28xx_fh
*fh
= priv
;
576 struct em28xx
*dev
= fh
->dev
;
583 static int vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
585 struct em28xx_fh
*fh
= priv
;
586 struct em28xx
*dev
= fh
->dev
;
593 if (i
>= MAX_EM28XX_INPUT
)
595 if (0 == INPUT(i
)->type
)
598 mutex_lock(&dev
->lock
);
602 mutex_unlock(&dev
->lock
);
606 static int vidioc_g_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
608 struct em28xx_fh
*fh
= priv
;
609 struct em28xx
*dev
= fh
->dev
;
610 unsigned int index
= a
->index
;
615 index
= dev
->ctl_ainput
;
618 strcpy(a
->name
, "Television");
620 strcpy(a
->name
, "Line In");
622 a
->capability
= V4L2_AUDCAP_STEREO
;
628 static int vidioc_s_audio(struct file
*file
, void *priv
, struct v4l2_audio
*a
)
630 struct em28xx_fh
*fh
= priv
;
631 struct em28xx
*dev
= fh
->dev
;
633 if (a
->index
!= dev
->ctl_ainput
)
639 static int vidioc_queryctrl(struct file
*file
, void *priv
,
640 struct v4l2_queryctrl
*qc
)
642 struct em28xx_fh
*fh
= priv
;
643 struct em28xx
*dev
= fh
->dev
;
652 memset(qc
, 0, sizeof(*qc
));
656 if (!dev
->has_msp34xx
) {
657 for (i
= 0; i
< ARRAY_SIZE(em28xx_qctrl
); i
++) {
658 if (qc
->id
&& qc
->id
== em28xx_qctrl
[i
].id
) {
659 memcpy(qc
, &(em28xx_qctrl
[i
]), sizeof(*qc
));
664 mutex_lock(&dev
->lock
);
665 em28xx_i2c_call_clients(dev
, VIDIOC_QUERYCTRL
, qc
);
666 mutex_unlock(&dev
->lock
);
674 static int vidioc_g_ctrl(struct file
*file
, void *priv
,
675 struct v4l2_control
*ctrl
)
677 struct em28xx_fh
*fh
= priv
;
678 struct em28xx
*dev
= fh
->dev
;
684 mutex_lock(&dev
->lock
);
686 if (!dev
->has_msp34xx
)
687 rc
= em28xx_get_ctrl(dev
, ctrl
);
692 em28xx_i2c_call_clients(dev
, VIDIOC_G_CTRL
, ctrl
);
696 mutex_unlock(&dev
->lock
);
700 static int vidioc_s_ctrl(struct file
*file
, void *priv
,
701 struct v4l2_control
*ctrl
)
703 struct em28xx_fh
*fh
= priv
;
704 struct em28xx
*dev
= fh
->dev
;
712 mutex_lock(&dev
->lock
);
714 if (dev
->has_msp34xx
)
715 em28xx_i2c_call_clients(dev
, VIDIOC_S_CTRL
, ctrl
);
718 for (i
= 0; i
< ARRAY_SIZE(em28xx_qctrl
); i
++) {
719 if (ctrl
->id
== em28xx_qctrl
[i
].id
) {
720 if (ctrl
->value
< em28xx_qctrl
[i
].minimum
||
721 ctrl
->value
> em28xx_qctrl
[i
].maximum
) {
726 rc
= em28xx_set_ctrl(dev
, ctrl
);
732 /* Control not found - try to send it to the attached devices */
734 em28xx_i2c_call_clients(dev
, VIDIOC_S_CTRL
, ctrl
);
738 mutex_unlock(&dev
->lock
);
742 static int vidioc_g_tuner(struct file
*file
, void *priv
,
743 struct v4l2_tuner
*t
)
745 struct em28xx_fh
*fh
= priv
;
746 struct em28xx
*dev
= fh
->dev
;
756 strcpy(t
->name
, "Tuner");
758 mutex_lock(&dev
->lock
);
760 em28xx_i2c_call_clients(dev
, VIDIOC_G_TUNER
, t
);
762 mutex_unlock(&dev
->lock
);
766 static int vidioc_s_tuner(struct file
*file
, void *priv
,
767 struct v4l2_tuner
*t
)
769 struct em28xx_fh
*fh
= priv
;
770 struct em28xx
*dev
= fh
->dev
;
780 mutex_lock(&dev
->lock
);
782 em28xx_i2c_call_clients(dev
, VIDIOC_S_TUNER
, t
);
784 mutex_unlock(&dev
->lock
);
788 static int vidioc_g_frequency(struct file
*file
, void *priv
,
789 struct v4l2_frequency
*f
)
791 struct em28xx_fh
*fh
= priv
;
792 struct em28xx
*dev
= fh
->dev
;
794 f
->type
= V4L2_TUNER_ANALOG_TV
;
795 f
->frequency
= dev
->ctl_freq
;
800 static int vidioc_s_frequency(struct file
*file
, void *priv
,
801 struct v4l2_frequency
*f
)
803 struct em28xx_fh
*fh
= priv
;
804 struct em28xx
*dev
= fh
->dev
;
814 if (V4L2_TUNER_ANALOG_TV
!= f
->type
)
817 mutex_lock(&dev
->lock
);
819 dev
->ctl_freq
= f
->frequency
;
820 em28xx_i2c_call_clients(dev
, VIDIOC_S_FREQUENCY
, f
);
822 mutex_unlock(&dev
->lock
);
826 static int vidioc_cropcap(struct file
*file
, void *priv
,
827 struct v4l2_cropcap
*cc
)
829 struct em28xx_fh
*fh
= priv
;
830 struct em28xx
*dev
= fh
->dev
;
832 if (cc
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
837 cc
->bounds
.width
= dev
->width
;
838 cc
->bounds
.height
= dev
->height
;
839 cc
->defrect
= cc
->bounds
;
840 cc
->pixelaspect
.numerator
= 54; /* 4:3 FIXME: remove magic numbers */
841 cc
->pixelaspect
.denominator
= 59;
846 static int vidioc_streamon(struct file
*file
, void *priv
,
847 enum v4l2_buf_type type
)
849 struct em28xx_fh
*fh
= priv
;
850 struct em28xx
*dev
= fh
->dev
;
857 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
)
860 if (list_empty(&dev
->inqueue
))
863 mutex_lock(&dev
->lock
);
865 if (unlikely(res_get(fh
) < 0)) {
866 mutex_unlock(&dev
->lock
);
870 dev
->stream
= STREAM_ON
; /* FIXME: Start video capture here? */
872 mutex_unlock(&dev
->lock
);
876 static int vidioc_streamoff(struct file
*file
, void *priv
,
877 enum v4l2_buf_type type
)
879 struct em28xx_fh
*fh
= priv
;
880 struct em28xx
*dev
= fh
->dev
;
887 if (type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
)
890 mutex_lock(&dev
->lock
);
892 if (dev
->stream
== STREAM_ON
) {
893 em28xx_videodbg("VIDIOC_STREAMOFF: interrupting stream\n");
894 rc
= em28xx_stream_interrupt(dev
);
896 mutex_unlock(&dev
->lock
);
901 em28xx_empty_framequeues(dev
);
903 mutex_unlock(&dev
->lock
);
907 static int vidioc_querycap(struct file
*file
, void *priv
,
908 struct v4l2_capability
*cap
)
910 struct em28xx_fh
*fh
= priv
;
911 struct em28xx
*dev
= fh
->dev
;
913 strlcpy(cap
->driver
, "em28xx", sizeof(cap
->driver
));
914 strlcpy(cap
->card
, em28xx_boards
[dev
->model
].name
, sizeof(cap
->card
));
915 strlcpy(cap
->bus_info
, dev
->udev
->dev
.bus_id
, sizeof(cap
->bus_info
));
917 cap
->version
= EM28XX_VERSION_CODE
;
920 V4L2_CAP_SLICED_VBI_CAPTURE
|
921 V4L2_CAP_VIDEO_CAPTURE
|
923 V4L2_CAP_READWRITE
| V4L2_CAP_STREAMING
;
926 cap
->capabilities
|= V4L2_CAP_TUNER
;
931 static int vidioc_enum_fmt_cap(struct file
*file
, void *priv
,
932 struct v4l2_fmtdesc
*fmtd
)
934 if (fmtd
->index
!= 0)
937 fmtd
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
938 strcpy(fmtd
->description
, "Packed YUY2");
939 fmtd
->pixelformat
= V4L2_PIX_FMT_YUYV
;
940 memset(fmtd
->reserved
, 0, sizeof(fmtd
->reserved
));
945 /* Sliced VBI ioctls */
946 static int vidioc_g_fmt_vbi_capture(struct file
*file
, void *priv
,
947 struct v4l2_format
*f
)
949 struct em28xx_fh
*fh
= priv
;
950 struct em28xx
*dev
= fh
->dev
;
957 mutex_lock(&dev
->lock
);
959 f
->fmt
.sliced
.service_set
= 0;
961 em28xx_i2c_call_clients(dev
, VIDIOC_G_FMT
, f
);
963 if (f
->fmt
.sliced
.service_set
== 0)
966 mutex_unlock(&dev
->lock
);
970 static int vidioc_try_set_vbi_capture(struct file
*file
, void *priv
,
971 struct v4l2_format
*f
)
973 struct em28xx_fh
*fh
= priv
;
974 struct em28xx
*dev
= fh
->dev
;
981 mutex_lock(&dev
->lock
);
982 em28xx_i2c_call_clients(dev
, VIDIOC_G_FMT
, f
);
983 mutex_unlock(&dev
->lock
);
985 if (f
->fmt
.sliced
.service_set
== 0)
992 static int vidioc_reqbufs(struct file
*file
, void *priv
,
993 struct v4l2_requestbuffers
*rb
)
995 struct em28xx_fh
*fh
= priv
;
996 struct em28xx
*dev
= fh
->dev
;
1000 rc
= check_dev(dev
);
1004 if (rb
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
||
1005 rb
->memory
!= V4L2_MEMORY_MMAP
)
1008 if (dev
->io
== IO_READ
) {
1009 em28xx_videodbg("method is set to read;"
1010 " close and open the device again to"
1011 " choose the mmap I/O method\n");
1015 for (i
= 0; i
< dev
->num_frames
; i
++)
1016 if (dev
->frame
[i
].vma_use_count
) {
1017 em28xx_videodbg("VIDIOC_REQBUFS failed; "
1018 "previous buffers are still mapped\n");
1022 mutex_lock(&dev
->lock
);
1024 if (dev
->stream
== STREAM_ON
) {
1025 em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
1026 rc
= em28xx_stream_interrupt(dev
);
1028 mutex_unlock(&dev
->lock
);
1033 em28xx_empty_framequeues(dev
);
1035 em28xx_release_buffers(dev
);
1037 rb
->count
= em28xx_request_buffers(dev
, rb
->count
);
1039 dev
->frame_current
= NULL
;
1040 dev
->io
= rb
->count
? IO_MMAP
: IO_NONE
;
1042 mutex_unlock(&dev
->lock
);
1046 static int vidioc_querybuf(struct file
*file
, void *priv
,
1047 struct v4l2_buffer
*b
)
1049 struct em28xx_fh
*fh
= priv
;
1050 struct em28xx
*dev
= fh
->dev
;
1053 rc
= check_dev(dev
);
1057 if (b
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
||
1058 b
->index
>= dev
->num_frames
|| dev
->io
!= IO_MMAP
)
1061 mutex_lock(&dev
->lock
);
1063 memcpy(b
, &dev
->frame
[b
->index
].buf
, sizeof(*b
));
1065 if (dev
->frame
[b
->index
].vma_use_count
)
1066 b
->flags
|= V4L2_BUF_FLAG_MAPPED
;
1068 if (dev
->frame
[b
->index
].state
== F_DONE
)
1069 b
->flags
|= V4L2_BUF_FLAG_DONE
;
1070 else if (dev
->frame
[b
->index
].state
!= F_UNUSED
)
1071 b
->flags
|= V4L2_BUF_FLAG_QUEUED
;
1073 mutex_unlock(&dev
->lock
);
1077 static int vidioc_qbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*b
)
1079 struct em28xx_fh
*fh
= priv
;
1080 struct em28xx
*dev
= fh
->dev
;
1081 unsigned long lock_flags
;
1084 rc
= check_dev(dev
);
1088 if (b
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
||
1089 b
->index
>= dev
->num_frames
)
1092 if (dev
->frame
[b
->index
].state
!= F_UNUSED
)
1095 dev
->frame
[b
->index
].state
= F_QUEUED
;
1097 /* add frame to fifo */
1098 spin_lock_irqsave(&dev
->queue_lock
, lock_flags
);
1099 list_add_tail(&dev
->frame
[b
->index
].frame
, &dev
->inqueue
);
1100 spin_unlock_irqrestore(&dev
->queue_lock
, lock_flags
);
1105 static int vidioc_dqbuf(struct file
*file
, void *priv
, struct v4l2_buffer
*b
)
1107 struct em28xx_fh
*fh
= priv
;
1108 struct em28xx
*dev
= fh
->dev
;
1110 struct em28xx_frame_t
*f
;
1111 unsigned long lock_flags
;
1113 rc
= check_dev(dev
);
1117 if (b
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev
->io
!= IO_MMAP
)
1120 if (list_empty(&dev
->outqueue
)) {
1121 if (dev
->stream
== STREAM_OFF
)
1124 if (file
->f_flags
& O_NONBLOCK
)
1127 rc
= wait_event_interruptible(dev
->wait_frame
,
1128 (!list_empty(&dev
->outqueue
)) ||
1129 (dev
->state
& DEV_DISCONNECTED
));
1133 if (dev
->state
& DEV_DISCONNECTED
)
1137 spin_lock_irqsave(&dev
->queue_lock
, lock_flags
);
1138 f
= list_entry(dev
->outqueue
.next
, struct em28xx_frame_t
, frame
);
1139 list_del(dev
->outqueue
.next
);
1140 spin_unlock_irqrestore(&dev
->queue_lock
, lock_flags
);
1142 f
->state
= F_UNUSED
;
1143 memcpy(b
, &f
->buf
, sizeof(*b
));
1145 if (f
->vma_use_count
)
1146 b
->flags
|= V4L2_BUF_FLAG_MAPPED
;
1152 * em28xx_v4l2_open()
1153 * inits the device and starts isoc transfer
1155 static int em28xx_v4l2_open(struct inode
*inode
, struct file
*filp
)
1157 int minor
= iminor(inode
);
1159 struct em28xx
*h
,*dev
= NULL
;
1160 struct em28xx_fh
*fh
;
1162 list_for_each_entry(h
, &em28xx_devlist
, devlist
) {
1163 if (h
->vdev
->minor
== minor
) {
1165 dev
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1167 if (h
->vbi_dev
->minor
== minor
) {
1169 dev
->type
= V4L2_BUF_TYPE_VBI_CAPTURE
;
1175 em28xx_videodbg("open minor=%d type=%s users=%d\n",
1176 minor
,v4l2_type_names
[dev
->type
],dev
->users
);
1178 fh
= kzalloc(sizeof(struct em28xx_fh
), GFP_KERNEL
);
1181 em28xx_errdev("em28xx-video.c: Out of memory?!\n");
1184 mutex_lock(&dev
->lock
);
1186 filp
->private_data
= fh
;
1188 if (dev
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
&& dev
->users
== 0) {
1189 em28xx_set_alternate(dev
);
1191 dev
->width
= norm_maxw(dev
);
1192 dev
->height
= norm_maxh(dev
);
1193 dev
->frame_size
= dev
->width
* dev
->height
* 2;
1194 dev
->field_size
= dev
->frame_size
>> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
1195 dev
->bytesperline
= dev
->width
* 2;
1199 em28xx_capture_start(dev
, 1);
1200 em28xx_resolution_set(dev
);
1203 /* start the transfer */
1204 errCode
= em28xx_init_isoc(dev
);
1208 em28xx_empty_framequeues(dev
);
1214 mutex_unlock(&dev
->lock
);
1219 * em28xx_realease_resources()
1220 * unregisters the v4l2,i2c and usb devices
1221 * called when the device gets disconected or at module unload
1223 static void em28xx_release_resources(struct em28xx
*dev
)
1226 /*FIXME: I2C IR should be disconnected */
1228 em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
1229 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
,
1230 dev
->vbi_dev
->minor
-MINOR_VFL_TYPE_VBI_MIN
);
1231 list_del(&dev
->devlist
);
1232 video_unregister_device(dev
->vdev
);
1233 video_unregister_device(dev
->vbi_dev
);
1234 em28xx_i2c_unregister(dev
);
1235 usb_put_dev(dev
->udev
);
1238 /* Mark device as unused */
1239 em28xx_devused
&=~(1<<dev
->devno
);
1243 * em28xx_v4l2_close()
1244 * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
1246 static int em28xx_v4l2_close(struct inode
*inode
, struct file
*filp
)
1248 struct em28xx_fh
*fh
= filp
->private_data
;
1249 struct em28xx
*dev
= fh
->dev
;
1252 em28xx_videodbg("users=%d\n", dev
->users
);
1258 mutex_lock(&dev
->lock
);
1260 if (dev
->users
== 1) {
1261 em28xx_uninit_isoc(dev
);
1262 em28xx_release_buffers(dev
);
1265 /* the device is already disconnect,
1266 free the remaining resources */
1267 if (dev
->state
& DEV_DISCONNECTED
) {
1268 em28xx_release_resources(dev
);
1269 mutex_unlock(&dev
->lock
);
1274 /* set alternate 0 */
1276 em28xx_videodbg("setting alternate 0\n");
1277 errCode
= usb_set_interface(dev
->udev
, 0, 0);
1279 em28xx_errdev("cannot change alternate number to "
1280 "0 (error=%i)\n", errCode
);
1285 wake_up_interruptible_nr(&dev
->open
, 1);
1286 mutex_unlock(&dev
->lock
);
1291 * em28xx_v4l2_read()
1292 * will allocate buffers when called for the first time
1295 em28xx_v4l2_read(struct file
*filp
, char __user
* buf
, size_t count
,
1298 struct em28xx_frame_t
*f
, *i
;
1299 unsigned long lock_flags
;
1301 struct em28xx_fh
*fh
= filp
->private_data
;
1302 struct em28xx
*dev
= fh
->dev
;
1304 /* FIXME: read() is not prepared to allow changing the video
1305 resolution while streaming. Seems a bug at em28xx_set_fmt
1308 if (unlikely(res_get(fh
) < 0))
1311 mutex_lock(&dev
->lock
);
1313 if (dev
->type
== V4L2_BUF_TYPE_VIDEO_CAPTURE
)
1314 em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
1316 if (dev
->type
== V4L2_BUF_TYPE_VBI_CAPTURE
) {
1317 em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
1318 em28xx_videodbg("not supported yet! ...\n");
1319 if (copy_to_user(buf
, "", 1)) {
1320 mutex_unlock(&dev
->lock
);
1323 mutex_unlock(&dev
->lock
);
1326 if (dev
->type
== V4L2_BUF_TYPE_SLICED_VBI_CAPTURE
) {
1327 em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
1328 em28xx_videodbg("not supported yet! ...\n");
1329 if (copy_to_user(buf
, "", 1)) {
1330 mutex_unlock(&dev
->lock
);
1333 mutex_unlock(&dev
->lock
);
1337 if (dev
->state
& DEV_DISCONNECTED
) {
1338 em28xx_videodbg("device not present\n");
1339 mutex_unlock(&dev
->lock
);
1343 if (dev
->state
& DEV_MISCONFIGURED
) {
1344 em28xx_videodbg("device misconfigured; close and open it again\n");
1345 mutex_unlock(&dev
->lock
);
1349 if (dev
->io
== IO_MMAP
) {
1350 em28xx_videodbg ("IO method is set to mmap; close and open"
1351 " the device again to choose the read method\n");
1352 mutex_unlock(&dev
->lock
);
1356 if (dev
->io
== IO_NONE
) {
1357 if (!em28xx_request_buffers(dev
, EM28XX_NUM_READ_FRAMES
)) {
1358 em28xx_errdev("read failed, not enough memory\n");
1359 mutex_unlock(&dev
->lock
);
1363 dev
->stream
= STREAM_ON
;
1364 em28xx_queue_unusedframes(dev
);
1368 mutex_unlock(&dev
->lock
);
1372 if (list_empty(&dev
->outqueue
)) {
1373 if (filp
->f_flags
& O_NONBLOCK
) {
1374 mutex_unlock(&dev
->lock
);
1377 ret
= wait_event_interruptible
1379 (!list_empty(&dev
->outqueue
)) ||
1380 (dev
->state
& DEV_DISCONNECTED
));
1382 mutex_unlock(&dev
->lock
);
1385 if (dev
->state
& DEV_DISCONNECTED
) {
1386 mutex_unlock(&dev
->lock
);
1389 dev
->video_bytesread
= 0;
1392 f
= list_entry(dev
->outqueue
.prev
, struct em28xx_frame_t
, frame
);
1394 em28xx_queue_unusedframes(dev
);
1396 if (count
> f
->buf
.length
)
1397 count
= f
->buf
.length
;
1399 if ((dev
->video_bytesread
+ count
) > dev
->frame_size
)
1400 count
= dev
->frame_size
- dev
->video_bytesread
;
1402 if (copy_to_user(buf
, f
->bufmem
+dev
->video_bytesread
, count
)) {
1403 em28xx_err("Error while copying to user\n");
1406 dev
->video_bytesread
+= count
;
1408 if (dev
->video_bytesread
== dev
->frame_size
) {
1409 spin_lock_irqsave(&dev
->queue_lock
, lock_flags
);
1410 list_for_each_entry(i
, &dev
->outqueue
, frame
)
1411 i
->state
= F_UNUSED
;
1412 INIT_LIST_HEAD(&dev
->outqueue
);
1413 spin_unlock_irqrestore(&dev
->queue_lock
, lock_flags
);
1415 em28xx_queue_unusedframes(dev
);
1416 dev
->video_bytesread
= 0;
1421 mutex_unlock(&dev
->lock
);
1427 * em28xx_v4l2_poll()
1428 * will allocate buffers when called for the first time
1430 static unsigned int em28xx_v4l2_poll(struct file
*filp
, poll_table
* wait
)
1432 unsigned int mask
= 0;
1433 struct em28xx_fh
*fh
= filp
->private_data
;
1434 struct em28xx
*dev
= fh
->dev
;
1436 if (unlikely(res_get(fh
) < 0))
1439 mutex_lock(&dev
->lock
);
1441 if (dev
->state
& DEV_DISCONNECTED
) {
1442 em28xx_videodbg("device not present\n");
1443 } else if (dev
->state
& DEV_MISCONFIGURED
) {
1444 em28xx_videodbg("device is misconfigured; close and open it again\n");
1446 if (dev
->io
== IO_NONE
) {
1447 if (!em28xx_request_buffers
1448 (dev
, EM28XX_NUM_READ_FRAMES
)) {
1450 ("poll() failed, not enough memory\n");
1453 dev
->stream
= STREAM_ON
;
1457 if (dev
->io
== IO_READ
) {
1458 em28xx_queue_unusedframes(dev
);
1459 poll_wait(filp
, &dev
->wait_frame
, wait
);
1461 if (!list_empty(&dev
->outqueue
))
1462 mask
|= POLLIN
| POLLRDNORM
;
1464 mutex_unlock(&dev
->lock
);
1470 mutex_unlock(&dev
->lock
);
1475 * em28xx_v4l2_mmap()
1477 static int em28xx_v4l2_mmap(struct file
*filp
, struct vm_area_struct
*vma
)
1479 struct em28xx_fh
*fh
= filp
->private_data
;
1480 struct em28xx
*dev
= fh
->dev
;
1481 unsigned long size
= vma
->vm_end
- vma
->vm_start
;
1482 unsigned long start
= vma
->vm_start
;
1486 if (unlikely(res_get(fh
) < 0))
1489 mutex_lock(&dev
->lock
);
1491 if (dev
->state
& DEV_DISCONNECTED
) {
1492 em28xx_videodbg("mmap: device not present\n");
1493 mutex_unlock(&dev
->lock
);
1497 if (dev
->state
& DEV_MISCONFIGURED
) {
1498 em28xx_videodbg ("mmap: Device is misconfigured; close and "
1500 mutex_unlock(&dev
->lock
);
1504 if (dev
->io
!= IO_MMAP
|| !(vma
->vm_flags
& VM_WRITE
)) {
1505 mutex_unlock(&dev
->lock
);
1509 if (size
> PAGE_ALIGN(dev
->frame
[0].buf
.length
))
1510 size
= PAGE_ALIGN(dev
->frame
[0].buf
.length
);
1512 for (i
= 0; i
< dev
->num_frames
; i
++) {
1513 if ((dev
->frame
[i
].buf
.m
.offset
>> PAGE_SHIFT
) == vma
->vm_pgoff
)
1516 if (i
== dev
->num_frames
) {
1517 em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
1518 mutex_unlock(&dev
->lock
);
1522 /* VM_IO is eventually going to replace PageReserved altogether */
1523 vma
->vm_flags
|= VM_IO
;
1524 vma
->vm_flags
|= VM_RESERVED
; /* avoid to swap out this VMA */
1526 pos
= dev
->frame
[i
].bufmem
;
1527 while (size
> 0) { /* size is page-aligned */
1528 if (vm_insert_page(vma
, start
, vmalloc_to_page(pos
))) {
1529 em28xx_videodbg("mmap: vm_insert_page failed\n");
1530 mutex_unlock(&dev
->lock
);
1538 vma
->vm_ops
= &em28xx_vm_ops
;
1539 vma
->vm_private_data
= &dev
->frame
[i
];
1541 em28xx_vm_open(vma
);
1542 mutex_unlock(&dev
->lock
);
1546 static const struct file_operations em28xx_v4l_fops
= {
1547 .owner
= THIS_MODULE
,
1548 .open
= em28xx_v4l2_open
,
1549 .release
= em28xx_v4l2_close
,
1550 .read
= em28xx_v4l2_read
,
1551 .poll
= em28xx_v4l2_poll
,
1552 .mmap
= em28xx_v4l2_mmap
,
1553 .ioctl
= video_ioctl2
,
1554 .llseek
= no_llseek
,
1555 .compat_ioctl
= v4l_compat_ioctl32
,
1558 static const struct video_device em28xx_video_template
= {
1559 .fops
= &em28xx_v4l_fops
,
1560 .release
= video_device_release
,
1563 .vidioc_querycap
= vidioc_querycap
,
1564 .vidioc_enum_fmt_cap
= vidioc_enum_fmt_cap
,
1565 .vidioc_g_fmt_cap
= vidioc_g_fmt_cap
,
1566 .vidioc_try_fmt_cap
= vidioc_try_fmt_cap
,
1567 .vidioc_s_fmt_cap
= vidioc_s_fmt_cap
,
1568 .vidioc_g_audio
= vidioc_g_audio
,
1569 .vidioc_s_audio
= vidioc_s_audio
,
1570 .vidioc_cropcap
= vidioc_cropcap
,
1572 .vidioc_g_fmt_vbi_capture
= vidioc_g_fmt_vbi_capture
,
1573 .vidioc_try_fmt_vbi_capture
= vidioc_try_set_vbi_capture
,
1574 .vidioc_s_fmt_vbi_capture
= vidioc_try_set_vbi_capture
,
1576 .vidioc_reqbufs
= vidioc_reqbufs
,
1577 .vidioc_querybuf
= vidioc_querybuf
,
1578 .vidioc_qbuf
= vidioc_qbuf
,
1579 .vidioc_dqbuf
= vidioc_dqbuf
,
1580 .vidioc_s_std
= vidioc_s_std
,
1581 .vidioc_enum_input
= vidioc_enum_input
,
1582 .vidioc_g_input
= vidioc_g_input
,
1583 .vidioc_s_input
= vidioc_s_input
,
1584 .vidioc_queryctrl
= vidioc_queryctrl
,
1585 .vidioc_g_ctrl
= vidioc_g_ctrl
,
1586 .vidioc_s_ctrl
= vidioc_s_ctrl
,
1587 .vidioc_streamon
= vidioc_streamon
,
1588 .vidioc_streamoff
= vidioc_streamoff
,
1589 .vidioc_g_tuner
= vidioc_g_tuner
,
1590 .vidioc_s_tuner
= vidioc_s_tuner
,
1591 .vidioc_g_frequency
= vidioc_g_frequency
,
1592 .vidioc_s_frequency
= vidioc_s_frequency
,
1594 .tvnorms
= V4L2_STD_ALL
,
1595 .current_norm
= V4L2_STD_PAL
,
1598 /******************************** usb interface *****************************************/
1601 static LIST_HEAD(em28xx_extension_devlist
);
1602 static DEFINE_MUTEX(em28xx_extension_devlist_lock
);
1604 int em28xx_register_extension(struct em28xx_ops
*ops
)
1606 struct em28xx
*h
, *dev
= NULL
;
1608 list_for_each_entry(h
, &em28xx_devlist
, devlist
)
1611 mutex_lock(&em28xx_extension_devlist_lock
);
1612 list_add_tail(&ops
->next
, &em28xx_extension_devlist
);
1616 printk(KERN_INFO
"Em28xx: Initialized (%s) extension\n", ops
->name
);
1617 mutex_unlock(&em28xx_extension_devlist_lock
);
1621 EXPORT_SYMBOL(em28xx_register_extension
);
1623 void em28xx_unregister_extension(struct em28xx_ops
*ops
)
1625 struct em28xx
*h
, *dev
= NULL
;
1627 list_for_each_entry(h
, &em28xx_devlist
, devlist
)
1633 mutex_lock(&em28xx_extension_devlist_lock
);
1634 printk(KERN_INFO
"Em28xx: Removed (%s) extension\n", ops
->name
);
1635 list_del(&ops
->next
);
1636 mutex_unlock(&em28xx_extension_devlist_lock
);
1638 EXPORT_SYMBOL(em28xx_unregister_extension
);
1642 * allocates and inits the device structs, registers i2c bus and v4l device
1644 static int em28xx_init_dev(struct em28xx
**devhandle
, struct usb_device
*udev
,
1647 struct em28xx_ops
*ops
= NULL
;
1648 struct em28xx
*dev
= *devhandle
;
1649 int retval
= -ENOMEM
;
1651 unsigned int maxh
, maxw
;
1654 mutex_init(&dev
->lock
);
1655 spin_lock_init(&dev
->queue_lock
);
1656 init_waitqueue_head(&dev
->open
);
1657 init_waitqueue_head(&dev
->wait_frame
);
1658 init_waitqueue_head(&dev
->wait_stream
);
1660 dev
->em28xx_write_regs
= em28xx_write_regs
;
1661 dev
->em28xx_read_reg
= em28xx_read_reg
;
1662 dev
->em28xx_read_reg_req_len
= em28xx_read_reg_req_len
;
1663 dev
->em28xx_write_regs_req
= em28xx_write_regs_req
;
1664 dev
->em28xx_read_reg_req
= em28xx_read_reg_req
;
1665 dev
->is_em2800
= em28xx_boards
[dev
->model
].is_em2800
;
1667 errCode
= em28xx_read_reg(dev
, CHIPID_REG
);
1669 em28xx_info("em28xx chip ID = %d\n", errCode
);
1671 em28xx_pre_card_setup(dev
);
1673 errCode
= em28xx_config(dev
);
1675 em28xx_errdev("error configuring device\n");
1676 em28xx_devused
&= ~(1<<dev
->devno
);
1681 /* register i2c bus */
1682 em28xx_i2c_register(dev
);
1684 /* Do board specific init and eeprom reading */
1685 em28xx_card_setup(dev
);
1687 /* Configure audio */
1688 em28xx_audio_analog_set(dev
);
1690 /* configure the device */
1691 em28xx_config_i2c(dev
);
1693 /* set default norm */
1694 dev
->norm
= em28xx_video_template
.current_norm
;
1696 maxw
= norm_maxw(dev
);
1697 maxh
= norm_maxh(dev
);
1699 /* set default image size */
1702 dev
->interlaced
= EM28XX_INTERLACED_DEFAULT
;
1703 dev
->field_size
= dev
->width
* dev
->height
;
1705 dev
->interlaced
? dev
->field_size
<< 1 : dev
->field_size
;
1706 dev
->bytesperline
= dev
->width
* 2;
1711 errCode
= em28xx_config(dev
);
1713 /* allocate and fill video video_device struct */
1714 dev
->vdev
= video_device_alloc();
1715 if (NULL
== dev
->vdev
) {
1716 em28xx_errdev("cannot allocate video_device.\n");
1717 em28xx_devused
&=~(1<<dev
->devno
);
1721 memcpy(dev
->vdev
, &em28xx_video_template
,
1722 sizeof(em28xx_video_template
));
1723 dev
->vdev
->type
= VID_TYPE_CAPTURE
;
1725 dev
->vdev
->type
|= VID_TYPE_TUNER
;
1726 dev
->vdev
->dev
= &dev
->udev
->dev
;
1727 snprintf(dev
->vdev
->name
, sizeof(dev
->vbi_dev
->name
),
1728 "%s#%d %s", "em28xx", dev
->devno
, "video");
1730 /* Allocate and fill vbi video_device struct */
1731 dev
->vbi_dev
= video_device_alloc();
1732 if (NULL
== dev
->vbi_dev
) {
1733 em28xx_errdev("cannot allocate video_device.\n");
1735 em28xx_devused
&=~(1<<dev
->devno
);
1739 memcpy(dev
->vbi_dev
, &em28xx_video_template
,
1740 sizeof(em28xx_video_template
));
1741 dev
->vbi_dev
->type
= VFL_TYPE_VBI
;
1742 dev
->vbi_dev
->dev
= &dev
->udev
->dev
;
1743 snprintf(dev
->vbi_dev
->name
, sizeof(dev
->vbi_dev
->name
),
1744 "%s#%d %s", "em28xx", dev
->devno
, "vbi");
1746 list_add_tail(&dev
->devlist
,&em28xx_devlist
);
1748 if (dev
->has_msp34xx
) {
1749 /* Send a reset to other chips via gpio */
1750 em28xx_write_regs_req(dev
, 0x00, 0x08, "\xf7", 1);
1752 em28xx_write_regs_req(dev
, 0x00, 0x08, "\xff", 1);
1758 /* register v4l2 video video_device */
1759 if ((retval
= video_register_device(dev
->vdev
, VFL_TYPE_GRABBER
,
1760 video_nr
[dev
->devno
]))) {
1761 em28xx_errdev("unable to register video device (error=%i).\n",
1763 mutex_unlock(&dev
->lock
);
1764 list_del(&dev
->devlist
);
1765 video_device_release(dev
->vdev
);
1766 em28xx_devused
&=~(1<<dev
->devno
);
1771 /* register v4l2 vbi video_device */
1772 if (video_register_device(dev
->vbi_dev
, VFL_TYPE_VBI
,
1773 vbi_nr
[dev
->devno
]) < 0) {
1774 printk("unable to register vbi device\n");
1775 mutex_unlock(&dev
->lock
);
1776 list_del(&dev
->devlist
);
1777 video_device_release(dev
->vbi_dev
);
1778 video_device_release(dev
->vdev
);
1779 em28xx_devused
&=~(1<<dev
->devno
);
1784 em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
1785 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
,
1786 dev
->vbi_dev
->minor
-MINOR_VFL_TYPE_VBI_MIN
);
1788 mutex_lock(&em28xx_extension_devlist_lock
);
1789 if (!list_empty(&em28xx_extension_devlist
)) {
1790 list_for_each_entry(ops
, &em28xx_extension_devlist
, next
) {
1795 mutex_unlock(&em28xx_extension_devlist_lock
);
1800 #if defined(CONFIG_MODULES) && defined(MODULE)
1801 static void request_module_async(struct work_struct
*work
)
1803 struct em28xx
*dev
= container_of(work
,
1804 struct em28xx
, request_module_wk
);
1806 if (!dev
->has_audio_class
)
1807 request_module("em28xx-alsa");
1810 static void request_modules(struct em28xx
*dev
)
1812 INIT_WORK(&dev
->request_module_wk
, request_module_async
);
1813 schedule_work(&dev
->request_module_wk
);
1816 #define request_modules(dev)
1817 #endif /* CONFIG_MODULES */
1820 * em28xx_usb_probe()
1821 * checks for supported devices
1823 static int em28xx_usb_probe(struct usb_interface
*interface
,
1824 const struct usb_device_id
*id
)
1826 const struct usb_endpoint_descriptor
*endpoint
;
1827 struct usb_device
*udev
;
1828 struct usb_interface
*uif
;
1829 struct em28xx
*dev
= NULL
;
1830 int retval
= -ENODEV
;
1833 udev
= usb_get_dev(interface_to_usbdev(interface
));
1834 ifnum
= interface
->altsetting
[0].desc
.bInterfaceNumber
;
1836 /* Check to see next free device and mark as used */
1837 nr
=find_first_zero_bit(&em28xx_devused
,EM28XX_MAXBOARDS
);
1838 em28xx_devused
|=1<<nr
;
1840 /* Don't register audio interfaces */
1841 if (interface
->altsetting
[0].desc
.bInterfaceClass
== USB_CLASS_AUDIO
) {
1842 em28xx_err(DRIVER_NAME
" audio device (%04x:%04x): interface %i, class %i\n",
1843 udev
->descriptor
.idVendor
,udev
->descriptor
.idProduct
,
1845 interface
->altsetting
[0].desc
.bInterfaceClass
);
1847 em28xx_devused
&=~(1<<nr
);
1851 em28xx_err(DRIVER_NAME
" new video device (%04x:%04x): interface %i, class %i\n",
1852 udev
->descriptor
.idVendor
,udev
->descriptor
.idProduct
,
1854 interface
->altsetting
[0].desc
.bInterfaceClass
);
1856 endpoint
= &interface
->cur_altsetting
->endpoint
[1].desc
;
1858 /* check if the device has the iso in endpoint at the correct place */
1859 if ((endpoint
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
1860 USB_ENDPOINT_XFER_ISOC
) {
1861 em28xx_err(DRIVER_NAME
" probing error: endpoint is non-ISO endpoint!\n");
1862 em28xx_devused
&=~(1<<nr
);
1865 if ((endpoint
->bEndpointAddress
& USB_ENDPOINT_DIR_MASK
) == USB_DIR_OUT
) {
1866 em28xx_err(DRIVER_NAME
" probing error: endpoint is ISO OUT endpoint!\n");
1867 em28xx_devused
&=~(1<<nr
);
1871 if (nr
>= EM28XX_MAXBOARDS
) {
1872 printk (DRIVER_NAME
": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS
);
1873 em28xx_devused
&=~(1<<nr
);
1877 /* allocate memory for our device state and initialize it */
1878 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
1880 em28xx_err(DRIVER_NAME
": out of memory!\n");
1881 em28xx_devused
&=~(1<<nr
);
1885 snprintf(dev
->name
, 29, "em28xx #%d", nr
);
1887 dev
->model
= id
->driver_info
;
1889 /* Checks if audio is provided by some interface */
1890 for (i
= 0; i
< udev
->config
->desc
.bNumInterfaces
; i
++) {
1891 uif
= udev
->config
->interface
[i
];
1892 if (uif
->altsetting
[0].desc
.bInterfaceClass
== USB_CLASS_AUDIO
) {
1893 dev
->has_audio_class
= 1;
1898 printk(KERN_INFO DRIVER_NAME
" %s usb audio class\n",
1899 dev
->has_audio_class
? "Has" : "Doesn't have");
1901 /* compute alternate max packet sizes */
1902 uif
= udev
->actconfig
->interface
[0];
1904 dev
->num_alt
=uif
->num_altsetting
;
1905 em28xx_info("Alternate settings: %i\n",dev
->num_alt
);
1906 // dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
1907 dev
->alt_max_pkt_size
= kmalloc(32*
1908 dev
->num_alt
,GFP_KERNEL
);
1909 if (dev
->alt_max_pkt_size
== NULL
) {
1910 em28xx_errdev("out of memory!\n");
1911 em28xx_devused
&=~(1<<nr
);
1916 for (i
= 0; i
< dev
->num_alt
; i
++) {
1917 u16 tmp
= le16_to_cpu(uif
->altsetting
[i
].endpoint
[1].desc
.
1919 dev
->alt_max_pkt_size
[i
] =
1920 (tmp
& 0x07ff) * (((tmp
& 0x1800) >> 11) + 1);
1921 em28xx_info("Alternate setting %i, max size= %i\n",i
,
1922 dev
->alt_max_pkt_size
[i
]);
1925 if ((card
[nr
]>=0)&&(card
[nr
]<em28xx_bcount
))
1926 dev
->model
= card
[nr
];
1928 /* allocate device struct */
1929 retval
= em28xx_init_dev(&dev
, udev
, nr
);
1933 em28xx_info("Found %s\n", em28xx_boards
[dev
->model
].name
);
1935 /* save our data pointer in this interface device */
1936 usb_set_intfdata(interface
, dev
);
1938 request_modules(dev
);
1944 * em28xx_usb_disconnect()
1945 * called when the device gets diconencted
1946 * video device will be unregistered on v4l2_close in case it is still open
1948 static void em28xx_usb_disconnect(struct usb_interface
*interface
)
1951 struct em28xx_ops
*ops
= NULL
;
1953 dev
= usb_get_intfdata(interface
);
1954 usb_set_intfdata(interface
, NULL
);
1959 em28xx_info("disconnecting %s\n", dev
->vdev
->name
);
1961 /* wait until all current v4l2 io is finished then deallocate resources */
1962 mutex_lock(&dev
->lock
);
1964 wake_up_interruptible_all(&dev
->open
);
1968 ("device /dev/video%d is open! Deregistration and memory "
1969 "deallocation are deferred on close.\n",
1970 dev
->vdev
->minor
-MINOR_VFL_TYPE_GRABBER_MIN
);
1972 dev
->state
|= DEV_MISCONFIGURED
;
1973 em28xx_uninit_isoc(dev
);
1974 dev
->state
|= DEV_DISCONNECTED
;
1975 wake_up_interruptible(&dev
->wait_frame
);
1976 wake_up_interruptible(&dev
->wait_stream
);
1978 dev
->state
|= DEV_DISCONNECTED
;
1979 em28xx_release_resources(dev
);
1981 mutex_unlock(&dev
->lock
);
1983 mutex_lock(&em28xx_extension_devlist_lock
);
1984 if (!list_empty(&em28xx_extension_devlist
)) {
1985 list_for_each_entry(ops
, &em28xx_extension_devlist
, next
) {
1989 mutex_unlock(&em28xx_extension_devlist_lock
);
1992 kfree(dev
->alt_max_pkt_size
);
1997 static struct usb_driver em28xx_usb_driver
= {
1999 .probe
= em28xx_usb_probe
,
2000 .disconnect
= em28xx_usb_disconnect
,
2001 .id_table
= em28xx_id_table
,
2004 static int __init
em28xx_module_init(void)
2008 printk(KERN_INFO DRIVER_NAME
" v4l2 driver version %d.%d.%d loaded\n",
2009 (EM28XX_VERSION_CODE
>> 16) & 0xff,
2010 (EM28XX_VERSION_CODE
>> 8) & 0xff, EM28XX_VERSION_CODE
& 0xff);
2012 printk(KERN_INFO DRIVER_NAME
" snapshot date %04d-%02d-%02d\n",
2013 SNAPSHOT
/ 10000, (SNAPSHOT
/ 100) % 100, SNAPSHOT
% 100);
2016 /* register this driver with the USB subsystem */
2017 result
= usb_register(&em28xx_usb_driver
);
2019 em28xx_err(DRIVER_NAME
2020 " usb_register failed. Error number %d.\n", result
);
2025 static void __exit
em28xx_module_exit(void)
2027 /* deregister this driver with the USB subsystem */
2028 usb_deregister(&em28xx_usb_driver
);
2031 module_init(em28xx_module_init
);
2032 module_exit(em28xx_module_exit
);