2 * camera image capture (abstract) bus driver
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
6 * This driver provides an interface between platform-specific camera
7 * busses and camera devices. It should be used if the camera is
8 * connected not over a "proper" bus like PCI or USB, but over a
9 * special bus, like, for example, the Quick Capture interface on PXA270
10 * SoCs. Later it should also be used for i.MX31 SoCs from Freescale.
11 * It can handle multiple cameras and / or multiple busses, which can
12 * be used, e.g., in stereo-vision applications.
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
19 #include <linux/device.h>
20 #include <linux/err.h>
21 #include <linux/i2c.h>
22 #include <linux/init.h>
23 #include <linux/list.h>
24 #include <linux/mutex.h>
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/regulator/consumer.h>
28 #include <linux/slab.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/vmalloc.h>
32 #include <media/soc_camera.h>
33 #include <media/v4l2-common.h>
34 #include <media/v4l2-ioctl.h>
35 #include <media/v4l2-dev.h>
36 #include <media/videobuf-core.h>
37 #include <media/videobuf2-core.h>
38 #include <media/soc_mediabus.h>
40 /* Default to VGA resolution */
41 #define DEFAULT_WIDTH 640
42 #define DEFAULT_HEIGHT 480
44 #define is_streaming(ici, icd) \
45 (((ici)->ops->init_videobuf) ? \
46 (icd)->vb_vidq.streaming : \
47 vb2_is_streaming(&(icd)->vb2_vidq))
49 static LIST_HEAD(hosts
);
50 static LIST_HEAD(devices
);
51 static DEFINE_MUTEX(list_lock
); /* Protects the list of hosts */
53 static int soc_camera_power_on(struct soc_camera_device
*icd
,
54 struct soc_camera_link
*icl
)
56 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
57 int ret
= regulator_bulk_enable(icl
->num_regulators
,
60 dev_err(icd
->pdev
, "Cannot enable regulators\n");
65 ret
= icl
->power(icd
->control
, 1);
68 "Platform failed to power-on the camera.\n");
73 ret
= v4l2_subdev_call(sd
, core
, s_power
, 1);
74 if (ret
< 0 && ret
!= -ENOIOCTLCMD
&& ret
!= -ENODEV
)
81 icl
->power(icd
->control
, 0);
83 regulator_bulk_disable(icl
->num_regulators
,
88 static int soc_camera_power_off(struct soc_camera_device
*icd
,
89 struct soc_camera_link
*icl
)
91 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
92 int ret
= v4l2_subdev_call(sd
, core
, s_power
, 0);
94 if (ret
< 0 && ret
!= -ENOIOCTLCMD
&& ret
!= -ENODEV
)
98 ret
= icl
->power(icd
->control
, 0);
101 "Platform failed to power-off the camera.\n");
106 ret
= regulator_bulk_disable(icl
->num_regulators
,
109 dev_err(icd
->pdev
, "Cannot disable regulators\n");
114 const struct soc_camera_format_xlate
*soc_camera_xlate_by_fourcc(
115 struct soc_camera_device
*icd
, unsigned int fourcc
)
119 for (i
= 0; i
< icd
->num_user_formats
; i
++)
120 if (icd
->user_formats
[i
].host_fmt
->fourcc
== fourcc
)
121 return icd
->user_formats
+ i
;
124 EXPORT_SYMBOL(soc_camera_xlate_by_fourcc
);
127 * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags
128 * @icl: camera platform parameters
129 * @cfg: media bus configuration
130 * @return: resulting flags
132 unsigned long soc_camera_apply_board_flags(struct soc_camera_link
*icl
,
133 const struct v4l2_mbus_config
*cfg
)
135 unsigned long f
, flags
= cfg
->flags
;
137 /* If only one of the two polarities is supported, switch to the opposite */
138 if (icl
->flags
& SOCAM_SENSOR_INVERT_HSYNC
) {
139 f
= flags
& (V4L2_MBUS_HSYNC_ACTIVE_HIGH
| V4L2_MBUS_HSYNC_ACTIVE_LOW
);
140 if (f
== V4L2_MBUS_HSYNC_ACTIVE_HIGH
|| f
== V4L2_MBUS_HSYNC_ACTIVE_LOW
)
141 flags
^= V4L2_MBUS_HSYNC_ACTIVE_HIGH
| V4L2_MBUS_HSYNC_ACTIVE_LOW
;
144 if (icl
->flags
& SOCAM_SENSOR_INVERT_VSYNC
) {
145 f
= flags
& (V4L2_MBUS_VSYNC_ACTIVE_HIGH
| V4L2_MBUS_VSYNC_ACTIVE_LOW
);
146 if (f
== V4L2_MBUS_VSYNC_ACTIVE_HIGH
|| f
== V4L2_MBUS_VSYNC_ACTIVE_LOW
)
147 flags
^= V4L2_MBUS_VSYNC_ACTIVE_HIGH
| V4L2_MBUS_VSYNC_ACTIVE_LOW
;
150 if (icl
->flags
& SOCAM_SENSOR_INVERT_PCLK
) {
151 f
= flags
& (V4L2_MBUS_PCLK_SAMPLE_RISING
| V4L2_MBUS_PCLK_SAMPLE_FALLING
);
152 if (f
== V4L2_MBUS_PCLK_SAMPLE_RISING
|| f
== V4L2_MBUS_PCLK_SAMPLE_FALLING
)
153 flags
^= V4L2_MBUS_PCLK_SAMPLE_RISING
| V4L2_MBUS_PCLK_SAMPLE_FALLING
;
158 EXPORT_SYMBOL(soc_camera_apply_board_flags
);
160 #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
163 static int soc_camera_try_fmt(struct soc_camera_device
*icd
,
164 struct v4l2_format
*f
)
166 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
167 const struct soc_camera_format_xlate
*xlate
;
168 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
171 dev_dbg(icd
->pdev
, "TRY_FMT(%c%c%c%c, %ux%u)\n",
172 pixfmtstr(pix
->pixelformat
), pix
->width
, pix
->height
);
174 if (!(ici
->capabilities
& SOCAM_HOST_CAP_STRIDE
)) {
175 pix
->bytesperline
= 0;
179 ret
= ici
->ops
->try_fmt(icd
, f
);
183 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
187 ret
= soc_mbus_bytes_per_line(pix
->width
, xlate
->host_fmt
);
191 pix
->bytesperline
= max_t(u32
, pix
->bytesperline
, ret
);
193 ret
= soc_mbus_image_size(xlate
->host_fmt
, pix
->bytesperline
,
198 pix
->sizeimage
= max_t(u32
, pix
->sizeimage
, ret
);
203 static int soc_camera_try_fmt_vid_cap(struct file
*file
, void *priv
,
204 struct v4l2_format
*f
)
206 struct soc_camera_device
*icd
= file
->private_data
;
208 WARN_ON(priv
!= file
->private_data
);
210 /* Only single-plane capture is supported so far */
211 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
214 /* limit format to hardware capabilities */
215 return soc_camera_try_fmt(icd
, f
);
218 static int soc_camera_enum_input(struct file
*file
, void *priv
,
219 struct v4l2_input
*inp
)
224 /* default is camera */
225 inp
->type
= V4L2_INPUT_TYPE_CAMERA
;
226 inp
->std
= V4L2_STD_UNKNOWN
;
227 strcpy(inp
->name
, "Camera");
232 static int soc_camera_g_input(struct file
*file
, void *priv
, unsigned int *i
)
239 static int soc_camera_s_input(struct file
*file
, void *priv
, unsigned int i
)
247 static int soc_camera_s_std(struct file
*file
, void *priv
, v4l2_std_id
*a
)
249 struct soc_camera_device
*icd
= file
->private_data
;
250 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
252 return v4l2_subdev_call(sd
, core
, s_std
, *a
);
255 static int soc_camera_g_std(struct file
*file
, void *priv
, v4l2_std_id
*a
)
257 struct soc_camera_device
*icd
= file
->private_data
;
258 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
260 return v4l2_subdev_call(sd
, core
, g_std
, a
);
263 static int soc_camera_enum_framesizes(struct file
*file
, void *fh
,
264 struct v4l2_frmsizeenum
*fsize
)
266 struct soc_camera_device
*icd
= file
->private_data
;
267 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
269 return ici
->ops
->enum_framesizes(icd
, fsize
);
272 static int soc_camera_reqbufs(struct file
*file
, void *priv
,
273 struct v4l2_requestbuffers
*p
)
276 struct soc_camera_device
*icd
= file
->private_data
;
277 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
279 WARN_ON(priv
!= file
->private_data
);
281 if (icd
->streamer
&& icd
->streamer
!= file
)
284 if (ici
->ops
->init_videobuf
) {
285 ret
= videobuf_reqbufs(&icd
->vb_vidq
, p
);
289 ret
= ici
->ops
->reqbufs(icd
, p
);
291 ret
= vb2_reqbufs(&icd
->vb2_vidq
, p
);
294 if (!ret
&& !icd
->streamer
)
295 icd
->streamer
= file
;
300 static int soc_camera_querybuf(struct file
*file
, void *priv
,
301 struct v4l2_buffer
*p
)
303 struct soc_camera_device
*icd
= file
->private_data
;
304 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
306 WARN_ON(priv
!= file
->private_data
);
308 if (ici
->ops
->init_videobuf
)
309 return videobuf_querybuf(&icd
->vb_vidq
, p
);
311 return vb2_querybuf(&icd
->vb2_vidq
, p
);
314 static int soc_camera_qbuf(struct file
*file
, void *priv
,
315 struct v4l2_buffer
*p
)
317 struct soc_camera_device
*icd
= file
->private_data
;
318 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
320 WARN_ON(priv
!= file
->private_data
);
322 if (icd
->streamer
!= file
)
325 if (ici
->ops
->init_videobuf
)
326 return videobuf_qbuf(&icd
->vb_vidq
, p
);
328 return vb2_qbuf(&icd
->vb2_vidq
, p
);
331 static int soc_camera_dqbuf(struct file
*file
, void *priv
,
332 struct v4l2_buffer
*p
)
334 struct soc_camera_device
*icd
= file
->private_data
;
335 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
337 WARN_ON(priv
!= file
->private_data
);
339 if (icd
->streamer
!= file
)
342 if (ici
->ops
->init_videobuf
)
343 return videobuf_dqbuf(&icd
->vb_vidq
, p
, file
->f_flags
& O_NONBLOCK
);
345 return vb2_dqbuf(&icd
->vb2_vidq
, p
, file
->f_flags
& O_NONBLOCK
);
348 static int soc_camera_create_bufs(struct file
*file
, void *priv
,
349 struct v4l2_create_buffers
*create
)
351 struct soc_camera_device
*icd
= file
->private_data
;
352 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
355 if (ici
->ops
->init_videobuf
)
358 return vb2_create_bufs(&icd
->vb2_vidq
, create
);
361 static int soc_camera_prepare_buf(struct file
*file
, void *priv
,
362 struct v4l2_buffer
*b
)
364 struct soc_camera_device
*icd
= file
->private_data
;
365 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
368 if (ici
->ops
->init_videobuf
)
371 return vb2_prepare_buf(&icd
->vb2_vidq
, b
);
374 /* Always entered with .video_lock held */
375 static int soc_camera_init_user_formats(struct soc_camera_device
*icd
)
377 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
378 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
379 unsigned int i
, fmts
= 0, raw_fmts
= 0;
381 enum v4l2_mbus_pixelcode code
;
383 while (!v4l2_subdev_call(sd
, video
, enum_mbus_fmt
, raw_fmts
, &code
))
386 if (!ici
->ops
->get_formats
)
388 * Fallback mode - the host will have to serve all
389 * sensor-provided formats one-to-one to the user
394 * First pass - only count formats this host-sensor
395 * configuration can provide
397 for (i
= 0; i
< raw_fmts
; i
++) {
398 ret
= ici
->ops
->get_formats(icd
, i
, NULL
);
408 vmalloc(fmts
* sizeof(struct soc_camera_format_xlate
));
409 if (!icd
->user_formats
)
412 dev_dbg(icd
->pdev
, "Found %d supported formats.\n", fmts
);
414 /* Second pass - actually fill data formats */
416 for (i
= 0; i
< raw_fmts
; i
++)
417 if (!ici
->ops
->get_formats
) {
418 v4l2_subdev_call(sd
, video
, enum_mbus_fmt
, i
, &code
);
419 icd
->user_formats
[fmts
].host_fmt
=
420 soc_mbus_get_fmtdesc(code
);
421 if (icd
->user_formats
[fmts
].host_fmt
)
422 icd
->user_formats
[fmts
++].code
= code
;
424 ret
= ici
->ops
->get_formats(icd
, i
,
425 &icd
->user_formats
[fmts
]);
431 icd
->num_user_formats
= fmts
;
432 icd
->current_fmt
= &icd
->user_formats
[0];
437 vfree(icd
->user_formats
);
441 /* Always entered with .video_lock held */
442 static void soc_camera_free_user_formats(struct soc_camera_device
*icd
)
444 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
446 if (ici
->ops
->put_formats
)
447 ici
->ops
->put_formats(icd
);
448 icd
->current_fmt
= NULL
;
449 icd
->num_user_formats
= 0;
450 vfree(icd
->user_formats
);
451 icd
->user_formats
= NULL
;
454 /* Called with .vb_lock held, or from the first open(2), see comment there */
455 static int soc_camera_set_fmt(struct soc_camera_device
*icd
,
456 struct v4l2_format
*f
)
458 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
459 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
462 dev_dbg(icd
->pdev
, "S_FMT(%c%c%c%c, %ux%u)\n",
463 pixfmtstr(pix
->pixelformat
), pix
->width
, pix
->height
);
465 /* We always call try_fmt() before set_fmt() or set_crop() */
466 ret
= soc_camera_try_fmt(icd
, f
);
470 ret
= ici
->ops
->set_fmt(icd
, f
);
473 } else if (!icd
->current_fmt
||
474 icd
->current_fmt
->host_fmt
->fourcc
!= pix
->pixelformat
) {
476 "Host driver hasn't set up current format correctly!\n");
480 icd
->user_width
= pix
->width
;
481 icd
->user_height
= pix
->height
;
482 icd
->bytesperline
= pix
->bytesperline
;
483 icd
->sizeimage
= pix
->sizeimage
;
484 icd
->colorspace
= pix
->colorspace
;
485 icd
->field
= pix
->field
;
486 if (ici
->ops
->init_videobuf
)
487 icd
->vb_vidq
.field
= pix
->field
;
489 dev_dbg(icd
->pdev
, "set width: %d height: %d\n",
490 icd
->user_width
, icd
->user_height
);
492 /* set physical bus parameters */
493 return ici
->ops
->set_bus_param(icd
);
496 static int soc_camera_open(struct file
*file
)
498 struct video_device
*vdev
= video_devdata(file
);
499 struct soc_camera_device
*icd
= dev_get_drvdata(vdev
->parent
);
500 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
501 struct soc_camera_host
*ici
;
504 if (!to_soc_camera_control(icd
))
505 /* No device driver attached */
508 ici
= to_soc_camera_host(icd
->parent
);
510 if (!try_module_get(ici
->ops
->owner
)) {
511 dev_err(icd
->pdev
, "Couldn't lock capture bus driver.\n");
517 /* Now we really have to activate the camera */
518 if (icd
->use_count
== 1) {
519 /* Restore parameters before the last close() per V4L2 API */
520 struct v4l2_format f
= {
521 .type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
,
523 .width
= icd
->user_width
,
524 .height
= icd
->user_height
,
526 .colorspace
= icd
->colorspace
,
528 icd
->current_fmt
->host_fmt
->fourcc
,
532 /* The camera could have been already on, try to reset */
534 icl
->reset(icd
->pdev
);
536 /* Don't mess with the host during probe */
537 mutex_lock(&ici
->host_lock
);
538 ret
= ici
->ops
->add(icd
);
539 mutex_unlock(&ici
->host_lock
);
541 dev_err(icd
->pdev
, "Couldn't activate the camera: %d\n", ret
);
545 ret
= soc_camera_power_on(icd
, icl
);
549 pm_runtime_enable(&icd
->vdev
->dev
);
550 ret
= pm_runtime_resume(&icd
->vdev
->dev
);
551 if (ret
< 0 && ret
!= -ENOSYS
)
555 * Try to configure with default parameters. Notice: this is the
556 * very first open, so, we cannot race against other calls,
557 * apart from someone else calling open() simultaneously, but
558 * .video_lock is protecting us against it.
560 ret
= soc_camera_set_fmt(icd
, &f
);
564 if (ici
->ops
->init_videobuf
) {
565 ici
->ops
->init_videobuf(&icd
->vb_vidq
, icd
);
567 ret
= ici
->ops
->init_videobuf2(&icd
->vb2_vidq
, icd
);
571 v4l2_ctrl_handler_setup(&icd
->ctrl_handler
);
574 file
->private_data
= icd
;
575 dev_dbg(icd
->pdev
, "camera device open\n");
580 * First four errors are entered with the .video_lock held
585 pm_runtime_disable(&icd
->vdev
->dev
);
587 soc_camera_power_off(icd
, icl
);
589 ici
->ops
->remove(icd
);
592 module_put(ici
->ops
->owner
);
597 static int soc_camera_close(struct file
*file
)
599 struct soc_camera_device
*icd
= file
->private_data
;
600 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
603 if (!icd
->use_count
) {
604 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
606 pm_runtime_suspend(&icd
->vdev
->dev
);
607 pm_runtime_disable(&icd
->vdev
->dev
);
609 if (ici
->ops
->init_videobuf2
)
610 vb2_queue_release(&icd
->vb2_vidq
);
611 ici
->ops
->remove(icd
);
613 soc_camera_power_off(icd
, icl
);
616 if (icd
->streamer
== file
)
617 icd
->streamer
= NULL
;
619 module_put(ici
->ops
->owner
);
621 dev_dbg(icd
->pdev
, "camera device close\n");
626 static ssize_t
soc_camera_read(struct file
*file
, char __user
*buf
,
627 size_t count
, loff_t
*ppos
)
629 struct soc_camera_device
*icd
= file
->private_data
;
632 dev_err(icd
->pdev
, "camera device read not implemented\n");
637 static int soc_camera_mmap(struct file
*file
, struct vm_area_struct
*vma
)
639 struct soc_camera_device
*icd
= file
->private_data
;
640 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
643 dev_dbg(icd
->pdev
, "mmap called, vma=0x%08lx\n", (unsigned long)vma
);
645 if (icd
->streamer
!= file
)
648 if (ici
->ops
->init_videobuf
)
649 err
= videobuf_mmap_mapper(&icd
->vb_vidq
, vma
);
651 err
= vb2_mmap(&icd
->vb2_vidq
, vma
);
653 dev_dbg(icd
->pdev
, "vma start=0x%08lx, size=%ld, ret=%d\n",
654 (unsigned long)vma
->vm_start
,
655 (unsigned long)vma
->vm_end
- (unsigned long)vma
->vm_start
,
661 static unsigned int soc_camera_poll(struct file
*file
, poll_table
*pt
)
663 struct soc_camera_device
*icd
= file
->private_data
;
664 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
666 if (icd
->streamer
!= file
)
669 if (ici
->ops
->init_videobuf
&& list_empty(&icd
->vb_vidq
.stream
)) {
670 dev_err(icd
->pdev
, "Trying to poll with no queued buffers!\n");
674 return ici
->ops
->poll(file
, pt
);
677 void soc_camera_lock(struct vb2_queue
*vq
)
679 struct soc_camera_device
*icd
= vb2_get_drv_priv(vq
);
680 mutex_lock(&icd
->video_lock
);
682 EXPORT_SYMBOL(soc_camera_lock
);
684 void soc_camera_unlock(struct vb2_queue
*vq
)
686 struct soc_camera_device
*icd
= vb2_get_drv_priv(vq
);
687 mutex_unlock(&icd
->video_lock
);
689 EXPORT_SYMBOL(soc_camera_unlock
);
691 static struct v4l2_file_operations soc_camera_fops
= {
692 .owner
= THIS_MODULE
,
693 .open
= soc_camera_open
,
694 .release
= soc_camera_close
,
695 .unlocked_ioctl
= video_ioctl2
,
696 .read
= soc_camera_read
,
697 .mmap
= soc_camera_mmap
,
698 .poll
= soc_camera_poll
,
701 static int soc_camera_s_fmt_vid_cap(struct file
*file
, void *priv
,
702 struct v4l2_format
*f
)
704 struct soc_camera_device
*icd
= file
->private_data
;
707 WARN_ON(priv
!= file
->private_data
);
709 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
) {
710 dev_warn(icd
->pdev
, "Wrong buf-type %d\n", f
->type
);
714 if (icd
->streamer
&& icd
->streamer
!= file
)
717 if (is_streaming(to_soc_camera_host(icd
->parent
), icd
)) {
718 dev_err(icd
->pdev
, "S_FMT denied: queue initialised\n");
722 ret
= soc_camera_set_fmt(icd
, f
);
724 if (!ret
&& !icd
->streamer
)
725 icd
->streamer
= file
;
730 static int soc_camera_enum_fmt_vid_cap(struct file
*file
, void *priv
,
731 struct v4l2_fmtdesc
*f
)
733 struct soc_camera_device
*icd
= file
->private_data
;
734 const struct soc_mbus_pixelfmt
*format
;
736 WARN_ON(priv
!= file
->private_data
);
738 if (f
->index
>= icd
->num_user_formats
)
741 format
= icd
->user_formats
[f
->index
].host_fmt
;
744 strlcpy(f
->description
, format
->name
, sizeof(f
->description
));
745 f
->pixelformat
= format
->fourcc
;
749 static int soc_camera_g_fmt_vid_cap(struct file
*file
, void *priv
,
750 struct v4l2_format
*f
)
752 struct soc_camera_device
*icd
= file
->private_data
;
753 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
755 WARN_ON(priv
!= file
->private_data
);
757 if (f
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
760 pix
->width
= icd
->user_width
;
761 pix
->height
= icd
->user_height
;
762 pix
->bytesperline
= icd
->bytesperline
;
763 pix
->sizeimage
= icd
->sizeimage
;
764 pix
->field
= icd
->field
;
765 pix
->pixelformat
= icd
->current_fmt
->host_fmt
->fourcc
;
766 pix
->colorspace
= icd
->colorspace
;
767 dev_dbg(icd
->pdev
, "current_fmt->fourcc: 0x%08x\n",
768 icd
->current_fmt
->host_fmt
->fourcc
);
772 static int soc_camera_querycap(struct file
*file
, void *priv
,
773 struct v4l2_capability
*cap
)
775 struct soc_camera_device
*icd
= file
->private_data
;
776 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
778 WARN_ON(priv
!= file
->private_data
);
780 strlcpy(cap
->driver
, ici
->drv_name
, sizeof(cap
->driver
));
781 return ici
->ops
->querycap(ici
, cap
);
784 static int soc_camera_streamon(struct file
*file
, void *priv
,
785 enum v4l2_buf_type i
)
787 struct soc_camera_device
*icd
= file
->private_data
;
788 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
789 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
792 WARN_ON(priv
!= file
->private_data
);
794 if (i
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
797 if (icd
->streamer
!= file
)
800 /* This calls buf_queue from host driver's videobuf_queue_ops */
801 if (ici
->ops
->init_videobuf
)
802 ret
= videobuf_streamon(&icd
->vb_vidq
);
804 ret
= vb2_streamon(&icd
->vb2_vidq
, i
);
807 v4l2_subdev_call(sd
, video
, s_stream
, 1);
812 static int soc_camera_streamoff(struct file
*file
, void *priv
,
813 enum v4l2_buf_type i
)
815 struct soc_camera_device
*icd
= file
->private_data
;
816 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
817 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
819 WARN_ON(priv
!= file
->private_data
);
821 if (i
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
824 if (icd
->streamer
!= file
)
828 * This calls buf_release from host driver's videobuf_queue_ops for all
829 * remaining buffers. When the last buffer is freed, stop capture
831 if (ici
->ops
->init_videobuf
)
832 videobuf_streamoff(&icd
->vb_vidq
);
834 vb2_streamoff(&icd
->vb2_vidq
, i
);
836 v4l2_subdev_call(sd
, video
, s_stream
, 0);
841 static int soc_camera_cropcap(struct file
*file
, void *fh
,
842 struct v4l2_cropcap
*a
)
844 struct soc_camera_device
*icd
= file
->private_data
;
845 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
847 return ici
->ops
->cropcap(icd
, a
);
850 static int soc_camera_g_crop(struct file
*file
, void *fh
,
853 struct soc_camera_device
*icd
= file
->private_data
;
854 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
857 ret
= ici
->ops
->get_crop(icd
, a
);
863 * According to the V4L2 API, drivers shall not update the struct v4l2_crop
864 * argument with the actual geometry, instead, the user shall use G_CROP to
867 static int soc_camera_s_crop(struct file
*file
, void *fh
,
870 struct soc_camera_device
*icd
= file
->private_data
;
871 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
872 struct v4l2_rect
*rect
= &a
->c
;
873 struct v4l2_crop current_crop
;
876 if (a
->type
!= V4L2_BUF_TYPE_VIDEO_CAPTURE
)
879 dev_dbg(icd
->pdev
, "S_CROP(%ux%u@%u:%u)\n",
880 rect
->width
, rect
->height
, rect
->left
, rect
->top
);
882 /* If get_crop fails, we'll let host and / or client drivers decide */
883 ret
= ici
->ops
->get_crop(icd
, ¤t_crop
);
885 /* Prohibit window size change with initialised buffers */
888 "S_CROP denied: getting current crop failed\n");
889 } else if ((a
->c
.width
== current_crop
.c
.width
&&
890 a
->c
.height
== current_crop
.c
.height
) ||
891 !is_streaming(ici
, icd
)) {
892 /* same size or not streaming - use .set_crop() */
893 ret
= ici
->ops
->set_crop(icd
, a
);
894 } else if (ici
->ops
->set_livecrop
) {
895 ret
= ici
->ops
->set_livecrop(icd
, a
);
898 "S_CROP denied: queue initialised and sizes differ\n");
905 static int soc_camera_g_parm(struct file
*file
, void *fh
,
906 struct v4l2_streamparm
*a
)
908 struct soc_camera_device
*icd
= file
->private_data
;
909 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
911 if (ici
->ops
->get_parm
)
912 return ici
->ops
->get_parm(icd
, a
);
917 static int soc_camera_s_parm(struct file
*file
, void *fh
,
918 struct v4l2_streamparm
*a
)
920 struct soc_camera_device
*icd
= file
->private_data
;
921 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
923 if (ici
->ops
->set_parm
)
924 return ici
->ops
->set_parm(icd
, a
);
929 static int soc_camera_g_chip_ident(struct file
*file
, void *fh
,
930 struct v4l2_dbg_chip_ident
*id
)
932 struct soc_camera_device
*icd
= file
->private_data
;
933 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
935 return v4l2_subdev_call(sd
, core
, g_chip_ident
, id
);
938 #ifdef CONFIG_VIDEO_ADV_DEBUG
939 static int soc_camera_g_register(struct file
*file
, void *fh
,
940 struct v4l2_dbg_register
*reg
)
942 struct soc_camera_device
*icd
= file
->private_data
;
943 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
945 return v4l2_subdev_call(sd
, core
, g_register
, reg
);
948 static int soc_camera_s_register(struct file
*file
, void *fh
,
949 struct v4l2_dbg_register
*reg
)
951 struct soc_camera_device
*icd
= file
->private_data
;
952 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
954 return v4l2_subdev_call(sd
, core
, s_register
, reg
);
958 static int soc_camera_probe(struct soc_camera_device
*icd
);
960 /* So far this function cannot fail */
961 static void scan_add_host(struct soc_camera_host
*ici
)
963 struct soc_camera_device
*icd
;
965 mutex_lock(&ici
->host_lock
);
967 list_for_each_entry(icd
, &devices
, list
) {
968 if (icd
->iface
== ici
->nr
) {
971 icd
->parent
= ici
->v4l2_dev
.dev
;
972 ret
= soc_camera_probe(icd
);
976 mutex_unlock(&ici
->host_lock
);
979 #ifdef CONFIG_I2C_BOARDINFO
980 static int soc_camera_init_i2c(struct soc_camera_device
*icd
,
981 struct soc_camera_link
*icl
)
983 struct i2c_client
*client
;
984 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
985 struct i2c_adapter
*adap
= i2c_get_adapter(icl
->i2c_adapter_id
);
986 struct v4l2_subdev
*subdev
;
989 dev_err(icd
->pdev
, "Cannot get I2C adapter #%d. No driver?\n",
990 icl
->i2c_adapter_id
);
994 icl
->board_info
->platform_data
= icl
;
996 subdev
= v4l2_i2c_new_subdev_board(&ici
->v4l2_dev
, adap
,
997 icl
->board_info
, NULL
);
1001 client
= v4l2_get_subdevdata(subdev
);
1003 /* Use to_i2c_client(dev) to recover the i2c client */
1004 icd
->control
= &client
->dev
;
1008 i2c_put_adapter(adap
);
1013 static void soc_camera_free_i2c(struct soc_camera_device
*icd
)
1015 struct i2c_client
*client
=
1016 to_i2c_client(to_soc_camera_control(icd
));
1017 struct i2c_adapter
*adap
= client
->adapter
;
1019 icd
->control
= NULL
;
1020 v4l2_device_unregister_subdev(i2c_get_clientdata(client
));
1021 i2c_unregister_device(client
);
1022 i2c_put_adapter(adap
);
1025 #define soc_camera_init_i2c(icd, icl) (-ENODEV)
1026 #define soc_camera_free_i2c(icd) do {} while (0)
1029 static int soc_camera_video_start(struct soc_camera_device
*icd
);
1030 static int video_dev_create(struct soc_camera_device
*icd
);
1031 /* Called during host-driver probe */
1032 static int soc_camera_probe(struct soc_camera_device
*icd
)
1034 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
1035 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
1036 struct device
*control
= NULL
;
1037 struct v4l2_subdev
*sd
;
1038 struct v4l2_mbus_framefmt mf
;
1041 dev_info(icd
->pdev
, "Probing %s\n", dev_name(icd
->pdev
));
1044 * Currently the subdev with the largest number of controls (13) is
1045 * ov6550. So let's pick 16 as a hint for the control handler. Note
1046 * that this is a hint only: too large and you waste some memory, too
1047 * small and there is a (very) small performance hit when looking up
1048 * controls in the internal hash.
1050 ret
= v4l2_ctrl_handler_init(&icd
->ctrl_handler
, 16);
1054 ret
= regulator_bulk_get(icd
->pdev
, icl
->num_regulators
,
1059 /* The camera could have been already on, try to reset */
1061 icl
->reset(icd
->pdev
);
1063 ret
= ici
->ops
->add(icd
);
1068 * This will not yet call v4l2_subdev_core_ops::s_power(1), because the
1069 * subdevice has not been initialised yet. We'll have to call it once
1070 * again after initialisation, even though it shouldn't be needed, we
1071 * don't do any IO here.
1073 ret
= soc_camera_power_on(icd
, icl
);
1077 /* Must have icd->vdev before registering the device */
1078 ret
= video_dev_create(icd
);
1082 /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */
1083 if (icl
->board_info
) {
1084 ret
= soc_camera_init_i2c(icd
, icl
);
1087 } else if (!icl
->add_device
|| !icl
->del_device
) {
1091 if (icl
->module_name
)
1092 ret
= request_module(icl
->module_name
);
1094 ret
= icl
->add_device(icd
);
1099 * FIXME: this is racy, have to use driver-binding notification,
1100 * when it is available
1102 control
= to_soc_camera_control(icd
);
1103 if (!control
|| !control
->driver
|| !dev_get_drvdata(control
) ||
1104 !try_module_get(control
->driver
->owner
)) {
1105 icl
->del_device(icd
);
1111 sd
= soc_camera_to_subdev(icd
);
1112 sd
->grp_id
= soc_camera_grp_id(icd
);
1113 v4l2_set_subdev_hostdata(sd
, icd
);
1115 if (v4l2_ctrl_add_handler(&icd
->ctrl_handler
, sd
->ctrl_handler
))
1118 /* At this point client .probe() should have run already */
1119 ret
= soc_camera_init_user_formats(icd
);
1123 icd
->field
= V4L2_FIELD_ANY
;
1126 * ..._video_start() will create a device node, video_register_device()
1127 * itself is protected against concurrent open() calls, but we also have
1128 * to protect our data.
1130 mutex_lock(&icd
->video_lock
);
1132 ret
= soc_camera_video_start(icd
);
1136 ret
= v4l2_subdev_call(sd
, core
, s_power
, 1);
1137 if (ret
< 0 && ret
!= -ENOIOCTLCMD
)
1140 /* Try to improve our guess of a reasonable window format */
1141 if (!v4l2_subdev_call(sd
, video
, g_mbus_fmt
, &mf
)) {
1142 icd
->user_width
= mf
.width
;
1143 icd
->user_height
= mf
.height
;
1144 icd
->colorspace
= mf
.colorspace
;
1145 icd
->field
= mf
.field
;
1148 ici
->ops
->remove(icd
);
1150 soc_camera_power_off(icd
, icl
);
1152 mutex_unlock(&icd
->video_lock
);
1157 video_unregister_device(icd
->vdev
);
1159 mutex_unlock(&icd
->video_lock
);
1160 soc_camera_free_user_formats(icd
);
1163 if (icl
->board_info
) {
1164 soc_camera_free_i2c(icd
);
1166 icl
->del_device(icd
);
1167 module_put(control
->driver
->owner
);
1171 video_device_release(icd
->vdev
);
1174 soc_camera_power_off(icd
, icl
);
1176 ici
->ops
->remove(icd
);
1178 regulator_bulk_free(icl
->num_regulators
, icl
->regulators
);
1180 v4l2_ctrl_handler_free(&icd
->ctrl_handler
);
1185 * This is called on device_unregister, which only means we have to disconnect
1186 * from the host, but not remove ourselves from the device list
1188 static int soc_camera_remove(struct soc_camera_device
*icd
)
1190 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
1191 struct video_device
*vdev
= icd
->vdev
;
1193 BUG_ON(!icd
->parent
);
1195 v4l2_ctrl_handler_free(&icd
->ctrl_handler
);
1197 video_unregister_device(vdev
);
1201 if (icl
->board_info
) {
1202 soc_camera_free_i2c(icd
);
1204 struct device_driver
*drv
= to_soc_camera_control(icd
)->driver
;
1206 icl
->del_device(icd
);
1207 module_put(drv
->owner
);
1210 soc_camera_free_user_formats(icd
);
1212 regulator_bulk_free(icl
->num_regulators
, icl
->regulators
);
1217 static int default_cropcap(struct soc_camera_device
*icd
,
1218 struct v4l2_cropcap
*a
)
1220 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1221 return v4l2_subdev_call(sd
, video
, cropcap
, a
);
1224 static int default_g_crop(struct soc_camera_device
*icd
, struct v4l2_crop
*a
)
1226 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1227 return v4l2_subdev_call(sd
, video
, g_crop
, a
);
1230 static int default_s_crop(struct soc_camera_device
*icd
, struct v4l2_crop
*a
)
1232 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1233 return v4l2_subdev_call(sd
, video
, s_crop
, a
);
1236 static int default_g_parm(struct soc_camera_device
*icd
,
1237 struct v4l2_streamparm
*parm
)
1239 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1240 return v4l2_subdev_call(sd
, video
, g_parm
, parm
);
1243 static int default_s_parm(struct soc_camera_device
*icd
,
1244 struct v4l2_streamparm
*parm
)
1246 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1247 return v4l2_subdev_call(sd
, video
, s_parm
, parm
);
1250 static int default_enum_framesizes(struct soc_camera_device
*icd
,
1251 struct v4l2_frmsizeenum
*fsize
)
1254 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
1255 const struct soc_camera_format_xlate
*xlate
;
1256 __u32 pixfmt
= fsize
->pixel_format
;
1257 struct v4l2_frmsizeenum fsize_mbus
= *fsize
;
1259 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
1262 /* map xlate-code to pixel_format, sensor only handle xlate-code*/
1263 fsize_mbus
.pixel_format
= xlate
->code
;
1265 ret
= v4l2_subdev_call(sd
, video
, enum_framesizes
, &fsize_mbus
);
1269 *fsize
= fsize_mbus
;
1270 fsize
->pixel_format
= pixfmt
;
1275 int soc_camera_host_register(struct soc_camera_host
*ici
)
1277 struct soc_camera_host
*ix
;
1280 if (!ici
|| !ici
->ops
||
1281 !ici
->ops
->try_fmt
||
1282 !ici
->ops
->set_fmt
||
1283 !ici
->ops
->set_bus_param
||
1284 !ici
->ops
->querycap
||
1285 ((!ici
->ops
->init_videobuf
||
1286 !ici
->ops
->reqbufs
) &&
1287 !ici
->ops
->init_videobuf2
) ||
1289 !ici
->ops
->remove
||
1294 if (!ici
->ops
->set_crop
)
1295 ici
->ops
->set_crop
= default_s_crop
;
1296 if (!ici
->ops
->get_crop
)
1297 ici
->ops
->get_crop
= default_g_crop
;
1298 if (!ici
->ops
->cropcap
)
1299 ici
->ops
->cropcap
= default_cropcap
;
1300 if (!ici
->ops
->set_parm
)
1301 ici
->ops
->set_parm
= default_s_parm
;
1302 if (!ici
->ops
->get_parm
)
1303 ici
->ops
->get_parm
= default_g_parm
;
1304 if (!ici
->ops
->enum_framesizes
)
1305 ici
->ops
->enum_framesizes
= default_enum_framesizes
;
1307 mutex_lock(&list_lock
);
1308 list_for_each_entry(ix
, &hosts
, list
) {
1309 if (ix
->nr
== ici
->nr
) {
1315 ret
= v4l2_device_register(ici
->v4l2_dev
.dev
, &ici
->v4l2_dev
);
1319 list_add_tail(&ici
->list
, &hosts
);
1320 mutex_unlock(&list_lock
);
1322 mutex_init(&ici
->host_lock
);
1328 mutex_unlock(&list_lock
);
1331 EXPORT_SYMBOL(soc_camera_host_register
);
1333 /* Unregister all clients! */
1334 void soc_camera_host_unregister(struct soc_camera_host
*ici
)
1336 struct soc_camera_device
*icd
;
1338 mutex_lock(&list_lock
);
1340 list_del(&ici
->list
);
1341 list_for_each_entry(icd
, &devices
, list
)
1342 if (icd
->iface
== ici
->nr
&& to_soc_camera_control(icd
))
1343 soc_camera_remove(icd
);
1345 mutex_unlock(&list_lock
);
1347 v4l2_device_unregister(&ici
->v4l2_dev
);
1349 EXPORT_SYMBOL(soc_camera_host_unregister
);
1351 /* Image capture device */
1352 static int soc_camera_device_register(struct soc_camera_device
*icd
)
1354 struct soc_camera_device
*ix
;
1357 for (i
= 0; i
< 256 && num
< 0; i
++) {
1359 /* Check if this index is available on this interface */
1360 list_for_each_entry(ix
, &devices
, list
) {
1361 if (ix
->iface
== icd
->iface
&& ix
->devnum
== i
) {
1370 * ok, we have 256 cameras on this host...
1371 * man, stay reasonable...
1377 icd
->host_priv
= NULL
;
1378 mutex_init(&icd
->video_lock
);
1380 list_add_tail(&icd
->list
, &devices
);
1385 static const struct v4l2_ioctl_ops soc_camera_ioctl_ops
= {
1386 .vidioc_querycap
= soc_camera_querycap
,
1387 .vidioc_try_fmt_vid_cap
= soc_camera_try_fmt_vid_cap
,
1388 .vidioc_g_fmt_vid_cap
= soc_camera_g_fmt_vid_cap
,
1389 .vidioc_s_fmt_vid_cap
= soc_camera_s_fmt_vid_cap
,
1390 .vidioc_enum_fmt_vid_cap
= soc_camera_enum_fmt_vid_cap
,
1391 .vidioc_enum_input
= soc_camera_enum_input
,
1392 .vidioc_g_input
= soc_camera_g_input
,
1393 .vidioc_s_input
= soc_camera_s_input
,
1394 .vidioc_s_std
= soc_camera_s_std
,
1395 .vidioc_g_std
= soc_camera_g_std
,
1396 .vidioc_enum_framesizes
= soc_camera_enum_framesizes
,
1397 .vidioc_reqbufs
= soc_camera_reqbufs
,
1398 .vidioc_querybuf
= soc_camera_querybuf
,
1399 .vidioc_qbuf
= soc_camera_qbuf
,
1400 .vidioc_dqbuf
= soc_camera_dqbuf
,
1401 .vidioc_create_bufs
= soc_camera_create_bufs
,
1402 .vidioc_prepare_buf
= soc_camera_prepare_buf
,
1403 .vidioc_streamon
= soc_camera_streamon
,
1404 .vidioc_streamoff
= soc_camera_streamoff
,
1405 .vidioc_cropcap
= soc_camera_cropcap
,
1406 .vidioc_g_crop
= soc_camera_g_crop
,
1407 .vidioc_s_crop
= soc_camera_s_crop
,
1408 .vidioc_g_parm
= soc_camera_g_parm
,
1409 .vidioc_s_parm
= soc_camera_s_parm
,
1410 .vidioc_g_chip_ident
= soc_camera_g_chip_ident
,
1411 #ifdef CONFIG_VIDEO_ADV_DEBUG
1412 .vidioc_g_register
= soc_camera_g_register
,
1413 .vidioc_s_register
= soc_camera_s_register
,
1417 static int video_dev_create(struct soc_camera_device
*icd
)
1419 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
1420 struct video_device
*vdev
= video_device_alloc();
1425 strlcpy(vdev
->name
, ici
->drv_name
, sizeof(vdev
->name
));
1427 vdev
->parent
= icd
->pdev
;
1428 vdev
->current_norm
= V4L2_STD_UNKNOWN
;
1429 vdev
->fops
= &soc_camera_fops
;
1430 vdev
->ioctl_ops
= &soc_camera_ioctl_ops
;
1431 vdev
->release
= video_device_release
;
1432 vdev
->tvnorms
= V4L2_STD_UNKNOWN
;
1433 vdev
->ctrl_handler
= &icd
->ctrl_handler
;
1434 vdev
->lock
= &icd
->video_lock
;
1435 /* Locking in file operations other than ioctl should be done
1436 by the driver, not the V4L2 core.
1437 This driver needs auditing so that this flag can be removed. */
1438 set_bit(V4L2_FL_LOCK_ALL_FOPS
, &vdev
->flags
);
1446 * Called from soc_camera_probe() above (with .video_lock held???)
1448 static int soc_camera_video_start(struct soc_camera_device
*icd
)
1450 const struct device_type
*type
= icd
->vdev
->dev
.type
;
1456 ret
= video_register_device(icd
->vdev
, VFL_TYPE_GRABBER
, -1);
1458 dev_err(icd
->pdev
, "video_register_device failed: %d\n", ret
);
1462 /* Restore device type, possibly set by the subdevice driver */
1463 icd
->vdev
->dev
.type
= type
;
1468 static int __devinit
soc_camera_pdrv_probe(struct platform_device
*pdev
)
1470 struct soc_camera_link
*icl
= pdev
->dev
.platform_data
;
1471 struct soc_camera_device
*icd
;
1477 icd
= kzalloc(sizeof(*icd
), GFP_KERNEL
);
1481 icd
->iface
= icl
->bus_id
;
1483 icd
->pdev
= &pdev
->dev
;
1484 platform_set_drvdata(pdev
, icd
);
1486 ret
= soc_camera_device_register(icd
);
1490 icd
->user_width
= DEFAULT_WIDTH
;
1491 icd
->user_height
= DEFAULT_HEIGHT
;
1502 * Only called on rmmod for each platform device, since they are not
1503 * hot-pluggable. Now we know, that all our users - hosts and devices have
1504 * been unloaded already
1506 static int __devexit
soc_camera_pdrv_remove(struct platform_device
*pdev
)
1508 struct soc_camera_device
*icd
= platform_get_drvdata(pdev
);
1513 list_del(&icd
->list
);
1520 static struct platform_driver __refdata soc_camera_pdrv
= {
1521 .probe
= soc_camera_pdrv_probe
,
1522 .remove
= __devexit_p(soc_camera_pdrv_remove
),
1524 .name
= "soc-camera-pdrv",
1525 .owner
= THIS_MODULE
,
1529 static int __init
soc_camera_init(void)
1531 return platform_driver_register(&soc_camera_pdrv
);
1534 static void __exit
soc_camera_exit(void)
1536 platform_driver_unregister(&soc_camera_pdrv
);
1539 module_init(soc_camera_init
);
1540 module_exit(soc_camera_exit
);
1542 MODULE_DESCRIPTION("Image capture bus driver");
1543 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1544 MODULE_LICENSE("GPL");
1545 MODULE_ALIAS("platform:soc-camera-pdrv");