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[media] soc_camera: Don't call .s_power() during probe
[deliverable/linux.git] / drivers / media / platform / soc_camera.c
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CommitLineData
1/*
2 * camera image capture (abstract) bus driver
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
5 *
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.
13 *
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.
17 */
18
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>
31
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>
39
40/* Default to VGA resolution */
41#define DEFAULT_WIDTH 640
42#define DEFAULT_HEIGHT 480
43
44#define is_streaming(ici, icd) \
45 (((ici)->ops->init_videobuf) ? \
46 (icd)->vb_vidq.streaming : \
47 vb2_is_streaming(&(icd)->vb2_vidq))
48
49static LIST_HEAD(hosts);
50static LIST_HEAD(devices);
51static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */
52
53static int soc_camera_power_on(struct soc_camera_device *icd,
54 struct soc_camera_link *icl)
55{
56 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
57 int ret = regulator_bulk_enable(icl->num_regulators,
58 icl->regulators);
59 if (ret < 0) {
60 dev_err(icd->pdev, "Cannot enable regulators\n");
61 return ret;
62 }
63
64 if (icl->power) {
65 ret = icl->power(icd->control, 1);
66 if (ret < 0) {
67 dev_err(icd->pdev,
68 "Platform failed to power-on the camera.\n");
69 goto elinkpwr;
70 }
71 }
72
73 ret = v4l2_subdev_call(sd, core, s_power, 1);
74 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
75 goto esdpwr;
76
77 return 0;
78
79esdpwr:
80 if (icl->power)
81 icl->power(icd->control, 0);
82elinkpwr:
83 regulator_bulk_disable(icl->num_regulators,
84 icl->regulators);
85 return ret;
86}
87
88static int soc_camera_power_off(struct soc_camera_device *icd,
89 struct soc_camera_link *icl)
90{
91 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
92 int ret = v4l2_subdev_call(sd, core, s_power, 0);
93
94 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
95 return ret;
96
97 if (icl->power) {
98 ret = icl->power(icd->control, 0);
99 if (ret < 0) {
100 dev_err(icd->pdev,
101 "Platform failed to power-off the camera.\n");
102 return ret;
103 }
104 }
105
106 ret = regulator_bulk_disable(icl->num_regulators,
107 icl->regulators);
108 if (ret < 0)
109 dev_err(icd->pdev, "Cannot disable regulators\n");
110
111 return ret;
112}
113
114const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
115 struct soc_camera_device *icd, unsigned int fourcc)
116{
117 unsigned int i;
118
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;
122 return NULL;
123}
124EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
125
126/**
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
131 */
132unsigned long soc_camera_apply_board_flags(struct soc_camera_link *icl,
133 const struct v4l2_mbus_config *cfg)
134{
135 unsigned long f, flags = cfg->flags;
136
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;
142 }
143
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;
148 }
149
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;
154 }
155
156 return flags;
157}
158EXPORT_SYMBOL(soc_camera_apply_board_flags);
159
160#define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
161 ((x) >> 24) & 0xff
162
163static int soc_camera_try_fmt(struct soc_camera_device *icd,
164 struct v4l2_format *f)
165{
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;
169 int ret;
170
171 dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n",
172 pixfmtstr(pix->pixelformat), pix->width, pix->height);
173
174 if (!(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) {
175 pix->bytesperline = 0;
176 pix->sizeimage = 0;
177 }
178
179 ret = ici->ops->try_fmt(icd, f);
180 if (ret < 0)
181 return ret;
182
183 xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
184 if (!xlate)
185 return -EINVAL;
186
187 ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt);
188 if (ret < 0)
189 return ret;
190
191 pix->bytesperline = max_t(u32, pix->bytesperline, ret);
192
193 ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline,
194 pix->height);
195 if (ret < 0)
196 return ret;
197
198 pix->sizeimage = max_t(u32, pix->sizeimage, ret);
199
200 return 0;
201}
202
203static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
204 struct v4l2_format *f)
205{
206 struct soc_camera_device *icd = file->private_data;
207
208 WARN_ON(priv != file->private_data);
209
210 /* Only single-plane capture is supported so far */
211 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
212 return -EINVAL;
213
214 /* limit format to hardware capabilities */
215 return soc_camera_try_fmt(icd, f);
216}
217
218static int soc_camera_enum_input(struct file *file, void *priv,
219 struct v4l2_input *inp)
220{
221 if (inp->index != 0)
222 return -EINVAL;
223
224 /* default is camera */
225 inp->type = V4L2_INPUT_TYPE_CAMERA;
226 inp->std = V4L2_STD_UNKNOWN;
227 strcpy(inp->name, "Camera");
228
229 return 0;
230}
231
232static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
233{
234 *i = 0;
235
236 return 0;
237}
238
239static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
240{
241 if (i > 0)
242 return -EINVAL;
243
244 return 0;
245}
246
247static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a)
248{
249 struct soc_camera_device *icd = file->private_data;
250 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
251
252 return v4l2_subdev_call(sd, core, s_std, *a);
253}
254
255static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a)
256{
257 struct soc_camera_device *icd = file->private_data;
258 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
259
260 return v4l2_subdev_call(sd, core, g_std, a);
261}
262
263static int soc_camera_enum_framesizes(struct file *file, void *fh,
264 struct v4l2_frmsizeenum *fsize)
265{
266 struct soc_camera_device *icd = file->private_data;
267 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
268
269 return ici->ops->enum_framesizes(icd, fsize);
270}
271
272static int soc_camera_reqbufs(struct file *file, void *priv,
273 struct v4l2_requestbuffers *p)
274{
275 int ret;
276 struct soc_camera_device *icd = file->private_data;
277 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
278
279 WARN_ON(priv != file->private_data);
280
281 if (icd->streamer && icd->streamer != file)
282 return -EBUSY;
283
284 if (ici->ops->init_videobuf) {
285 ret = videobuf_reqbufs(&icd->vb_vidq, p);
286 if (ret < 0)
287 return ret;
288
289 ret = ici->ops->reqbufs(icd, p);
290 } else {
291 ret = vb2_reqbufs(&icd->vb2_vidq, p);
292 }
293
294 if (!ret && !icd->streamer)
295 icd->streamer = file;
296
297 return ret;
298}
299
300static int soc_camera_querybuf(struct file *file, void *priv,
301 struct v4l2_buffer *p)
302{
303 struct soc_camera_device *icd = file->private_data;
304 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
305
306 WARN_ON(priv != file->private_data);
307
308 if (ici->ops->init_videobuf)
309 return videobuf_querybuf(&icd->vb_vidq, p);
310 else
311 return vb2_querybuf(&icd->vb2_vidq, p);
312}
313
314static int soc_camera_qbuf(struct file *file, void *priv,
315 struct v4l2_buffer *p)
316{
317 struct soc_camera_device *icd = file->private_data;
318 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
319
320 WARN_ON(priv != file->private_data);
321
322 if (icd->streamer != file)
323 return -EBUSY;
324
325 if (ici->ops->init_videobuf)
326 return videobuf_qbuf(&icd->vb_vidq, p);
327 else
328 return vb2_qbuf(&icd->vb2_vidq, p);
329}
330
331static int soc_camera_dqbuf(struct file *file, void *priv,
332 struct v4l2_buffer *p)
333{
334 struct soc_camera_device *icd = file->private_data;
335 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
336
337 WARN_ON(priv != file->private_data);
338
339 if (icd->streamer != file)
340 return -EBUSY;
341
342 if (ici->ops->init_videobuf)
343 return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK);
344 else
345 return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK);
346}
347
348static int soc_camera_create_bufs(struct file *file, void *priv,
349 struct v4l2_create_buffers *create)
350{
351 struct soc_camera_device *icd = file->private_data;
352 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
353
354 /* videobuf2 only */
355 if (ici->ops->init_videobuf)
356 return -EINVAL;
357 else
358 return vb2_create_bufs(&icd->vb2_vidq, create);
359}
360
361static int soc_camera_prepare_buf(struct file *file, void *priv,
362 struct v4l2_buffer *b)
363{
364 struct soc_camera_device *icd = file->private_data;
365 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
366
367 /* videobuf2 only */
368 if (ici->ops->init_videobuf)
369 return -EINVAL;
370 else
371 return vb2_prepare_buf(&icd->vb2_vidq, b);
372}
373
374/* Always entered with .video_lock held */
375static int soc_camera_init_user_formats(struct soc_camera_device *icd)
376{
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;
380 int ret;
381 enum v4l2_mbus_pixelcode code;
382
383 while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code))
384 raw_fmts++;
385
386 if (!ici->ops->get_formats)
387 /*
388 * Fallback mode - the host will have to serve all
389 * sensor-provided formats one-to-one to the user
390 */
391 fmts = raw_fmts;
392 else
393 /*
394 * First pass - only count formats this host-sensor
395 * configuration can provide
396 */
397 for (i = 0; i < raw_fmts; i++) {
398 ret = ici->ops->get_formats(icd, i, NULL);
399 if (ret < 0)
400 return ret;
401 fmts += ret;
402 }
403
404 if (!fmts)
405 return -ENXIO;
406
407 icd->user_formats =
408 vmalloc(fmts * sizeof(struct soc_camera_format_xlate));
409 if (!icd->user_formats)
410 return -ENOMEM;
411
412 dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts);
413
414 /* Second pass - actually fill data formats */
415 fmts = 0;
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;
423 } else {
424 ret = ici->ops->get_formats(icd, i,
425 &icd->user_formats[fmts]);
426 if (ret < 0)
427 goto egfmt;
428 fmts += ret;
429 }
430
431 icd->num_user_formats = fmts;
432 icd->current_fmt = &icd->user_formats[0];
433
434 return 0;
435
436egfmt:
437 vfree(icd->user_formats);
438 return ret;
439}
440
441/* Always entered with .video_lock held */
442static void soc_camera_free_user_formats(struct soc_camera_device *icd)
443{
444 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
445
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;
452}
453
454/* Called with .vb_lock held, or from the first open(2), see comment there */
455static int soc_camera_set_fmt(struct soc_camera_device *icd,
456 struct v4l2_format *f)
457{
458 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
459 struct v4l2_pix_format *pix = &f->fmt.pix;
460 int ret;
461
462 dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n",
463 pixfmtstr(pix->pixelformat), pix->width, pix->height);
464
465 /* We always call try_fmt() before set_fmt() or set_crop() */
466 ret = soc_camera_try_fmt(icd, f);
467 if (ret < 0)
468 return ret;
469
470 ret = ici->ops->set_fmt(icd, f);
471 if (ret < 0) {
472 return ret;
473 } else if (!icd->current_fmt ||
474 icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
475 dev_err(icd->pdev,
476 "Host driver hasn't set up current format correctly!\n");
477 return -EINVAL;
478 }
479
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;
488
489 dev_dbg(icd->pdev, "set width: %d height: %d\n",
490 icd->user_width, icd->user_height);
491
492 /* set physical bus parameters */
493 return ici->ops->set_bus_param(icd);
494}
495
496static int soc_camera_open(struct file *file)
497{
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;
502 int ret;
503
504 if (!to_soc_camera_control(icd))
505 /* No device driver attached */
506 return -ENODEV;
507
508 ici = to_soc_camera_host(icd->parent);
509
510 if (mutex_lock_interruptible(&icd->video_lock))
511 return -ERESTARTSYS;
512 if (!try_module_get(ici->ops->owner)) {
513 dev_err(icd->pdev, "Couldn't lock capture bus driver.\n");
514 ret = -EINVAL;
515 goto emodule;
516 }
517
518 icd->use_count++;
519
520 /* Now we really have to activate the camera */
521 if (icd->use_count == 1) {
522 /* Restore parameters before the last close() per V4L2 API */
523 struct v4l2_format f = {
524 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
525 .fmt.pix = {
526 .width = icd->user_width,
527 .height = icd->user_height,
528 .field = icd->field,
529 .colorspace = icd->colorspace,
530 .pixelformat =
531 icd->current_fmt->host_fmt->fourcc,
532 },
533 };
534
535 /* The camera could have been already on, try to reset */
536 if (icl->reset)
537 icl->reset(icd->pdev);
538
539 /* Don't mess with the host during probe */
540 mutex_lock(&ici->host_lock);
541 ret = ici->ops->add(icd);
542 mutex_unlock(&ici->host_lock);
543 if (ret < 0) {
544 dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret);
545 goto eiciadd;
546 }
547
548 ret = soc_camera_power_on(icd, icl);
549 if (ret < 0)
550 goto epower;
551
552 pm_runtime_enable(&icd->vdev->dev);
553 ret = pm_runtime_resume(&icd->vdev->dev);
554 if (ret < 0 && ret != -ENOSYS)
555 goto eresume;
556
557 /*
558 * Try to configure with default parameters. Notice: this is the
559 * very first open, so, we cannot race against other calls,
560 * apart from someone else calling open() simultaneously, but
561 * .video_lock is protecting us against it.
562 */
563 ret = soc_camera_set_fmt(icd, &f);
564 if (ret < 0)
565 goto esfmt;
566
567 if (ici->ops->init_videobuf) {
568 ici->ops->init_videobuf(&icd->vb_vidq, icd);
569 } else {
570 ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd);
571 if (ret < 0)
572 goto einitvb;
573 }
574 v4l2_ctrl_handler_setup(&icd->ctrl_handler);
575 }
576 mutex_unlock(&icd->video_lock);
577
578 file->private_data = icd;
579 dev_dbg(icd->pdev, "camera device open\n");
580
581 return 0;
582
583 /*
584 * First four errors are entered with the .video_lock held
585 * and use_count == 1
586 */
587einitvb:
588esfmt:
589 pm_runtime_disable(&icd->vdev->dev);
590eresume:
591 soc_camera_power_off(icd, icl);
592epower:
593 ici->ops->remove(icd);
594eiciadd:
595 icd->use_count--;
596 module_put(ici->ops->owner);
597emodule:
598 mutex_unlock(&icd->video_lock);
599
600 return ret;
601}
602
603static int soc_camera_close(struct file *file)
604{
605 struct soc_camera_device *icd = file->private_data;
606 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
607
608 mutex_lock(&icd->video_lock);
609 icd->use_count--;
610 if (!icd->use_count) {
611 struct soc_camera_link *icl = to_soc_camera_link(icd);
612
613 pm_runtime_suspend(&icd->vdev->dev);
614 pm_runtime_disable(&icd->vdev->dev);
615
616 if (ici->ops->init_videobuf2)
617 vb2_queue_release(&icd->vb2_vidq);
618 ici->ops->remove(icd);
619
620 soc_camera_power_off(icd, icl);
621 }
622
623 if (icd->streamer == file)
624 icd->streamer = NULL;
625 mutex_unlock(&icd->video_lock);
626
627 module_put(ici->ops->owner);
628
629 dev_dbg(icd->pdev, "camera device close\n");
630
631 return 0;
632}
633
634static ssize_t soc_camera_read(struct file *file, char __user *buf,
635 size_t count, loff_t *ppos)
636{
637 struct soc_camera_device *icd = file->private_data;
638 int err = -EINVAL;
639
640 dev_err(icd->pdev, "camera device read not implemented\n");
641
642 return err;
643}
644
645static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)
646{
647 struct soc_camera_device *icd = file->private_data;
648 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
649 int err;
650
651 dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
652
653 if (icd->streamer != file)
654 return -EBUSY;
655
656 if (mutex_lock_interruptible(&icd->video_lock))
657 return -ERESTARTSYS;
658 if (ici->ops->init_videobuf)
659 err = videobuf_mmap_mapper(&icd->vb_vidq, vma);
660 else
661 err = vb2_mmap(&icd->vb2_vidq, vma);
662 mutex_unlock(&icd->video_lock);
663
664 dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n",
665 (unsigned long)vma->vm_start,
666 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start,
667 err);
668
669 return err;
670}
671
672static unsigned int soc_camera_poll(struct file *file, poll_table *pt)
673{
674 struct soc_camera_device *icd = file->private_data;
675 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
676 unsigned res = POLLERR;
677
678 if (icd->streamer != file)
679 return POLLERR;
680
681 mutex_lock(&icd->video_lock);
682 if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream))
683 dev_err(icd->pdev, "Trying to poll with no queued buffers!\n");
684 else
685 res = ici->ops->poll(file, pt);
686 mutex_unlock(&icd->video_lock);
687 return res;
688}
689
690void soc_camera_lock(struct vb2_queue *vq)
691{
692 struct soc_camera_device *icd = vb2_get_drv_priv(vq);
693 mutex_lock(&icd->video_lock);
694}
695EXPORT_SYMBOL(soc_camera_lock);
696
697void soc_camera_unlock(struct vb2_queue *vq)
698{
699 struct soc_camera_device *icd = vb2_get_drv_priv(vq);
700 mutex_unlock(&icd->video_lock);
701}
702EXPORT_SYMBOL(soc_camera_unlock);
703
704static struct v4l2_file_operations soc_camera_fops = {
705 .owner = THIS_MODULE,
706 .open = soc_camera_open,
707 .release = soc_camera_close,
708 .unlocked_ioctl = video_ioctl2,
709 .read = soc_camera_read,
710 .mmap = soc_camera_mmap,
711 .poll = soc_camera_poll,
712};
713
714static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
715 struct v4l2_format *f)
716{
717 struct soc_camera_device *icd = file->private_data;
718 int ret;
719
720 WARN_ON(priv != file->private_data);
721
722 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
723 dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type);
724 return -EINVAL;
725 }
726
727 if (icd->streamer && icd->streamer != file)
728 return -EBUSY;
729
730 if (is_streaming(to_soc_camera_host(icd->parent), icd)) {
731 dev_err(icd->pdev, "S_FMT denied: queue initialised\n");
732 return -EBUSY;
733 }
734
735 ret = soc_camera_set_fmt(icd, f);
736
737 if (!ret && !icd->streamer)
738 icd->streamer = file;
739
740 return ret;
741}
742
743static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv,
744 struct v4l2_fmtdesc *f)
745{
746 struct soc_camera_device *icd = file->private_data;
747 const struct soc_mbus_pixelfmt *format;
748
749 WARN_ON(priv != file->private_data);
750
751 if (f->index >= icd->num_user_formats)
752 return -EINVAL;
753
754 format = icd->user_formats[f->index].host_fmt;
755
756 if (format->name)
757 strlcpy(f->description, format->name, sizeof(f->description));
758 f->pixelformat = format->fourcc;
759 return 0;
760}
761
762static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
763 struct v4l2_format *f)
764{
765 struct soc_camera_device *icd = file->private_data;
766 struct v4l2_pix_format *pix = &f->fmt.pix;
767
768 WARN_ON(priv != file->private_data);
769
770 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
771 return -EINVAL;
772
773 pix->width = icd->user_width;
774 pix->height = icd->user_height;
775 pix->bytesperline = icd->bytesperline;
776 pix->sizeimage = icd->sizeimage;
777 pix->field = icd->field;
778 pix->pixelformat = icd->current_fmt->host_fmt->fourcc;
779 pix->colorspace = icd->colorspace;
780 dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n",
781 icd->current_fmt->host_fmt->fourcc);
782 return 0;
783}
784
785static int soc_camera_querycap(struct file *file, void *priv,
786 struct v4l2_capability *cap)
787{
788 struct soc_camera_device *icd = file->private_data;
789 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
790
791 WARN_ON(priv != file->private_data);
792
793 strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver));
794 return ici->ops->querycap(ici, cap);
795}
796
797static int soc_camera_streamon(struct file *file, void *priv,
798 enum v4l2_buf_type i)
799{
800 struct soc_camera_device *icd = file->private_data;
801 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
802 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
803 int ret;
804
805 WARN_ON(priv != file->private_data);
806
807 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
808 return -EINVAL;
809
810 if (icd->streamer != file)
811 return -EBUSY;
812
813 /* This calls buf_queue from host driver's videobuf_queue_ops */
814 if (ici->ops->init_videobuf)
815 ret = videobuf_streamon(&icd->vb_vidq);
816 else
817 ret = vb2_streamon(&icd->vb2_vidq, i);
818
819 if (!ret)
820 v4l2_subdev_call(sd, video, s_stream, 1);
821
822 return ret;
823}
824
825static int soc_camera_streamoff(struct file *file, void *priv,
826 enum v4l2_buf_type i)
827{
828 struct soc_camera_device *icd = file->private_data;
829 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
830 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
831
832 WARN_ON(priv != file->private_data);
833
834 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
835 return -EINVAL;
836
837 if (icd->streamer != file)
838 return -EBUSY;
839
840 /*
841 * This calls buf_release from host driver's videobuf_queue_ops for all
842 * remaining buffers. When the last buffer is freed, stop capture
843 */
844 if (ici->ops->init_videobuf)
845 videobuf_streamoff(&icd->vb_vidq);
846 else
847 vb2_streamoff(&icd->vb2_vidq, i);
848
849 v4l2_subdev_call(sd, video, s_stream, 0);
850
851 return 0;
852}
853
854static int soc_camera_cropcap(struct file *file, void *fh,
855 struct v4l2_cropcap *a)
856{
857 struct soc_camera_device *icd = file->private_data;
858 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
859
860 return ici->ops->cropcap(icd, a);
861}
862
863static int soc_camera_g_crop(struct file *file, void *fh,
864 struct v4l2_crop *a)
865{
866 struct soc_camera_device *icd = file->private_data;
867 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
868 int ret;
869
870 ret = ici->ops->get_crop(icd, a);
871
872 return ret;
873}
874
875/*
876 * According to the V4L2 API, drivers shall not update the struct v4l2_crop
877 * argument with the actual geometry, instead, the user shall use G_CROP to
878 * retrieve it.
879 */
880static int soc_camera_s_crop(struct file *file, void *fh,
881 struct v4l2_crop *a)
882{
883 struct soc_camera_device *icd = file->private_data;
884 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
885 struct v4l2_rect *rect = &a->c;
886 struct v4l2_crop current_crop;
887 int ret;
888
889 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
890 return -EINVAL;
891
892 dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n",
893 rect->width, rect->height, rect->left, rect->top);
894
895 /* If get_crop fails, we'll let host and / or client drivers decide */
896 ret = ici->ops->get_crop(icd, &current_crop);
897
898 /* Prohibit window size change with initialised buffers */
899 if (ret < 0) {
900 dev_err(icd->pdev,
901 "S_CROP denied: getting current crop failed\n");
902 } else if ((a->c.width == current_crop.c.width &&
903 a->c.height == current_crop.c.height) ||
904 !is_streaming(ici, icd)) {
905 /* same size or not streaming - use .set_crop() */
906 ret = ici->ops->set_crop(icd, a);
907 } else if (ici->ops->set_livecrop) {
908 ret = ici->ops->set_livecrop(icd, a);
909 } else {
910 dev_err(icd->pdev,
911 "S_CROP denied: queue initialised and sizes differ\n");
912 ret = -EBUSY;
913 }
914
915 return ret;
916}
917
918static int soc_camera_g_parm(struct file *file, void *fh,
919 struct v4l2_streamparm *a)
920{
921 struct soc_camera_device *icd = file->private_data;
922 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
923
924 if (ici->ops->get_parm)
925 return ici->ops->get_parm(icd, a);
926
927 return -ENOIOCTLCMD;
928}
929
930static int soc_camera_s_parm(struct file *file, void *fh,
931 struct v4l2_streamparm *a)
932{
933 struct soc_camera_device *icd = file->private_data;
934 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
935
936 if (ici->ops->set_parm)
937 return ici->ops->set_parm(icd, a);
938
939 return -ENOIOCTLCMD;
940}
941
942static int soc_camera_g_chip_ident(struct file *file, void *fh,
943 struct v4l2_dbg_chip_ident *id)
944{
945 struct soc_camera_device *icd = file->private_data;
946 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
947
948 return v4l2_subdev_call(sd, core, g_chip_ident, id);
949}
950
951#ifdef CONFIG_VIDEO_ADV_DEBUG
952static int soc_camera_g_register(struct file *file, void *fh,
953 struct v4l2_dbg_register *reg)
954{
955 struct soc_camera_device *icd = file->private_data;
956 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
957
958 return v4l2_subdev_call(sd, core, g_register, reg);
959}
960
961static int soc_camera_s_register(struct file *file, void *fh,
962 struct v4l2_dbg_register *reg)
963{
964 struct soc_camera_device *icd = file->private_data;
965 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
966
967 return v4l2_subdev_call(sd, core, s_register, reg);
968}
969#endif
970
971static int soc_camera_probe(struct soc_camera_device *icd);
972
973/* So far this function cannot fail */
974static void scan_add_host(struct soc_camera_host *ici)
975{
976 struct soc_camera_device *icd;
977
978 mutex_lock(&ici->host_lock);
979
980 list_for_each_entry(icd, &devices, list) {
981 if (icd->iface == ici->nr) {
982 int ret;
983
984 icd->parent = ici->v4l2_dev.dev;
985 ret = soc_camera_probe(icd);
986 }
987 }
988
989 mutex_unlock(&ici->host_lock);
990}
991
992#ifdef CONFIG_I2C_BOARDINFO
993static int soc_camera_init_i2c(struct soc_camera_device *icd,
994 struct soc_camera_link *icl)
995{
996 struct i2c_client *client;
997 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
998 struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id);
999 struct v4l2_subdev *subdev;
1000
1001 if (!adap) {
1002 dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n",
1003 icl->i2c_adapter_id);
1004 goto ei2cga;
1005 }
1006
1007 icl->board_info->platform_data = icl;
1008
1009 subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap,
1010 icl->board_info, NULL);
1011 if (!subdev)
1012 goto ei2cnd;
1013
1014 client = v4l2_get_subdevdata(subdev);
1015
1016 /* Use to_i2c_client(dev) to recover the i2c client */
1017 icd->control = &client->dev;
1018
1019 return 0;
1020ei2cnd:
1021 i2c_put_adapter(adap);
1022ei2cga:
1023 return -ENODEV;
1024}
1025
1026static void soc_camera_free_i2c(struct soc_camera_device *icd)
1027{
1028 struct i2c_client *client =
1029 to_i2c_client(to_soc_camera_control(icd));
1030 struct i2c_adapter *adap = client->adapter;
1031
1032 icd->control = NULL;
1033 v4l2_device_unregister_subdev(i2c_get_clientdata(client));
1034 i2c_unregister_device(client);
1035 i2c_put_adapter(adap);
1036}
1037#else
1038#define soc_camera_init_i2c(icd, icl) (-ENODEV)
1039#define soc_camera_free_i2c(icd) do {} while (0)
1040#endif
1041
1042static int soc_camera_video_start(struct soc_camera_device *icd);
1043static int video_dev_create(struct soc_camera_device *icd);
1044/* Called during host-driver probe */
1045static int soc_camera_probe(struct soc_camera_device *icd)
1046{
1047 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1048 struct soc_camera_link *icl = to_soc_camera_link(icd);
1049 struct device *control = NULL;
1050 struct v4l2_subdev *sd;
1051 struct v4l2_mbus_framefmt mf;
1052 int ret;
1053
1054 dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev));
1055
1056 /*
1057 * Currently the subdev with the largest number of controls (13) is
1058 * ov6550. So let's pick 16 as a hint for the control handler. Note
1059 * that this is a hint only: too large and you waste some memory, too
1060 * small and there is a (very) small performance hit when looking up
1061 * controls in the internal hash.
1062 */
1063 ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16);
1064 if (ret < 0)
1065 return ret;
1066
1067 ret = regulator_bulk_get(icd->pdev, icl->num_regulators,
1068 icl->regulators);
1069 if (ret < 0)
1070 goto ereg;
1071
1072 /* The camera could have been already on, try to reset */
1073 if (icl->reset)
1074 icl->reset(icd->pdev);
1075
1076 ret = ici->ops->add(icd);
1077 if (ret < 0)
1078 goto eadd;
1079
1080 /*
1081 * This will not yet call v4l2_subdev_core_ops::s_power(1), because the
1082 * subdevice has not been initialised yet. We'll have to call it once
1083 * again after initialisation, even though it shouldn't be needed, we
1084 * don't do any IO here.
1085 */
1086 ret = soc_camera_power_on(icd, icl);
1087 if (ret < 0)
1088 goto epower;
1089
1090 /* Must have icd->vdev before registering the device */
1091 ret = video_dev_create(icd);
1092 if (ret < 0)
1093 goto evdc;
1094
1095 /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */
1096 if (icl->board_info) {
1097 ret = soc_camera_init_i2c(icd, icl);
1098 if (ret < 0)
1099 goto eadddev;
1100 } else if (!icl->add_device || !icl->del_device) {
1101 ret = -EINVAL;
1102 goto eadddev;
1103 } else {
1104 if (icl->module_name)
1105 ret = request_module(icl->module_name);
1106
1107 ret = icl->add_device(icd);
1108 if (ret < 0)
1109 goto eadddev;
1110
1111 /*
1112 * FIXME: this is racy, have to use driver-binding notification,
1113 * when it is available
1114 */
1115 control = to_soc_camera_control(icd);
1116 if (!control || !control->driver || !dev_get_drvdata(control) ||
1117 !try_module_get(control->driver->owner)) {
1118 icl->del_device(icd);
1119 ret = -ENODEV;
1120 goto enodrv;
1121 }
1122 }
1123
1124 sd = soc_camera_to_subdev(icd);
1125 sd->grp_id = soc_camera_grp_id(icd);
1126 v4l2_set_subdev_hostdata(sd, icd);
1127
1128 if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler))
1129 goto ectrl;
1130
1131 /* At this point client .probe() should have run already */
1132 ret = soc_camera_init_user_formats(icd);
1133 if (ret < 0)
1134 goto eiufmt;
1135
1136 icd->field = V4L2_FIELD_ANY;
1137
1138 /*
1139 * ..._video_start() will create a device node, video_register_device()
1140 * itself is protected against concurrent open() calls, but we also have
1141 * to protect our data.
1142 */
1143 mutex_lock(&icd->video_lock);
1144
1145 ret = soc_camera_video_start(icd);
1146 if (ret < 0)
1147 goto evidstart;
1148
1149 /* Try to improve our guess of a reasonable window format */
1150 if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) {
1151 icd->user_width = mf.width;
1152 icd->user_height = mf.height;
1153 icd->colorspace = mf.colorspace;
1154 icd->field = mf.field;
1155 }
1156
1157 ici->ops->remove(icd);
1158
1159 soc_camera_power_off(icd, icl);
1160
1161 mutex_unlock(&icd->video_lock);
1162
1163 return 0;
1164
1165evidstart:
1166 mutex_unlock(&icd->video_lock);
1167 soc_camera_free_user_formats(icd);
1168eiufmt:
1169ectrl:
1170 if (icl->board_info) {
1171 soc_camera_free_i2c(icd);
1172 } else {
1173 icl->del_device(icd);
1174 module_put(control->driver->owner);
1175 }
1176enodrv:
1177eadddev:
1178 video_device_release(icd->vdev);
1179 icd->vdev = NULL;
1180evdc:
1181 soc_camera_power_off(icd, icl);
1182epower:
1183 ici->ops->remove(icd);
1184eadd:
1185 regulator_bulk_free(icl->num_regulators, icl->regulators);
1186ereg:
1187 v4l2_ctrl_handler_free(&icd->ctrl_handler);
1188 return ret;
1189}
1190
1191/*
1192 * This is called on device_unregister, which only means we have to disconnect
1193 * from the host, but not remove ourselves from the device list
1194 */
1195static int soc_camera_remove(struct soc_camera_device *icd)
1196{
1197 struct soc_camera_link *icl = to_soc_camera_link(icd);
1198 struct video_device *vdev = icd->vdev;
1199
1200 BUG_ON(!icd->parent);
1201
1202 v4l2_ctrl_handler_free(&icd->ctrl_handler);
1203 if (vdev) {
1204 video_unregister_device(vdev);
1205 icd->vdev = NULL;
1206 }
1207
1208 if (icl->board_info) {
1209 soc_camera_free_i2c(icd);
1210 } else {
1211 struct device_driver *drv = to_soc_camera_control(icd)->driver;
1212 if (drv) {
1213 icl->del_device(icd);
1214 module_put(drv->owner);
1215 }
1216 }
1217 soc_camera_free_user_formats(icd);
1218
1219 regulator_bulk_free(icl->num_regulators, icl->regulators);
1220
1221 return 0;
1222}
1223
1224static int default_cropcap(struct soc_camera_device *icd,
1225 struct v4l2_cropcap *a)
1226{
1227 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1228 return v4l2_subdev_call(sd, video, cropcap, a);
1229}
1230
1231static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1232{
1233 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1234 return v4l2_subdev_call(sd, video, g_crop, a);
1235}
1236
1237static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1238{
1239 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1240 return v4l2_subdev_call(sd, video, s_crop, a);
1241}
1242
1243static int default_g_parm(struct soc_camera_device *icd,
1244 struct v4l2_streamparm *parm)
1245{
1246 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1247 return v4l2_subdev_call(sd, video, g_parm, parm);
1248}
1249
1250static int default_s_parm(struct soc_camera_device *icd,
1251 struct v4l2_streamparm *parm)
1252{
1253 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1254 return v4l2_subdev_call(sd, video, s_parm, parm);
1255}
1256
1257static int default_enum_framesizes(struct soc_camera_device *icd,
1258 struct v4l2_frmsizeenum *fsize)
1259{
1260 int ret;
1261 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1262 const struct soc_camera_format_xlate *xlate;
1263 __u32 pixfmt = fsize->pixel_format;
1264 struct v4l2_frmsizeenum fsize_mbus = *fsize;
1265
1266 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1267 if (!xlate)
1268 return -EINVAL;
1269 /* map xlate-code to pixel_format, sensor only handle xlate-code*/
1270 fsize_mbus.pixel_format = xlate->code;
1271
1272 ret = v4l2_subdev_call(sd, video, enum_framesizes, &fsize_mbus);
1273 if (ret < 0)
1274 return ret;
1275
1276 *fsize = fsize_mbus;
1277 fsize->pixel_format = pixfmt;
1278
1279 return 0;
1280}
1281
1282int soc_camera_host_register(struct soc_camera_host *ici)
1283{
1284 struct soc_camera_host *ix;
1285 int ret;
1286
1287 if (!ici || !ici->ops ||
1288 !ici->ops->try_fmt ||
1289 !ici->ops->set_fmt ||
1290 !ici->ops->set_bus_param ||
1291 !ici->ops->querycap ||
1292 ((!ici->ops->init_videobuf ||
1293 !ici->ops->reqbufs) &&
1294 !ici->ops->init_videobuf2) ||
1295 !ici->ops->add ||
1296 !ici->ops->remove ||
1297 !ici->ops->poll ||
1298 !ici->v4l2_dev.dev)
1299 return -EINVAL;
1300
1301 if (!ici->ops->set_crop)
1302 ici->ops->set_crop = default_s_crop;
1303 if (!ici->ops->get_crop)
1304 ici->ops->get_crop = default_g_crop;
1305 if (!ici->ops->cropcap)
1306 ici->ops->cropcap = default_cropcap;
1307 if (!ici->ops->set_parm)
1308 ici->ops->set_parm = default_s_parm;
1309 if (!ici->ops->get_parm)
1310 ici->ops->get_parm = default_g_parm;
1311 if (!ici->ops->enum_framesizes)
1312 ici->ops->enum_framesizes = default_enum_framesizes;
1313
1314 mutex_lock(&list_lock);
1315 list_for_each_entry(ix, &hosts, list) {
1316 if (ix->nr == ici->nr) {
1317 ret = -EBUSY;
1318 goto edevreg;
1319 }
1320 }
1321
1322 ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev);
1323 if (ret < 0)
1324 goto edevreg;
1325
1326 list_add_tail(&ici->list, &hosts);
1327 mutex_unlock(&list_lock);
1328
1329 mutex_init(&ici->host_lock);
1330 scan_add_host(ici);
1331
1332 return 0;
1333
1334edevreg:
1335 mutex_unlock(&list_lock);
1336 return ret;
1337}
1338EXPORT_SYMBOL(soc_camera_host_register);
1339
1340/* Unregister all clients! */
1341void soc_camera_host_unregister(struct soc_camera_host *ici)
1342{
1343 struct soc_camera_device *icd;
1344
1345 mutex_lock(&list_lock);
1346
1347 list_del(&ici->list);
1348 list_for_each_entry(icd, &devices, list)
1349 if (icd->iface == ici->nr && to_soc_camera_control(icd))
1350 soc_camera_remove(icd);
1351
1352 mutex_unlock(&list_lock);
1353
1354 v4l2_device_unregister(&ici->v4l2_dev);
1355}
1356EXPORT_SYMBOL(soc_camera_host_unregister);
1357
1358/* Image capture device */
1359static int soc_camera_device_register(struct soc_camera_device *icd)
1360{
1361 struct soc_camera_device *ix;
1362 int num = -1, i;
1363
1364 for (i = 0; i < 256 && num < 0; i++) {
1365 num = i;
1366 /* Check if this index is available on this interface */
1367 list_for_each_entry(ix, &devices, list) {
1368 if (ix->iface == icd->iface && ix->devnum == i) {
1369 num = -1;
1370 break;
1371 }
1372 }
1373 }
1374
1375 if (num < 0)
1376 /*
1377 * ok, we have 256 cameras on this host...
1378 * man, stay reasonable...
1379 */
1380 return -ENOMEM;
1381
1382 icd->devnum = num;
1383 icd->use_count = 0;
1384 icd->host_priv = NULL;
1385 mutex_init(&icd->video_lock);
1386
1387 list_add_tail(&icd->list, &devices);
1388
1389 return 0;
1390}
1391
1392static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = {
1393 .vidioc_querycap = soc_camera_querycap,
1394 .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap,
1395 .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap,
1396 .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap,
1397 .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap,
1398 .vidioc_enum_input = soc_camera_enum_input,
1399 .vidioc_g_input = soc_camera_g_input,
1400 .vidioc_s_input = soc_camera_s_input,
1401 .vidioc_s_std = soc_camera_s_std,
1402 .vidioc_g_std = soc_camera_g_std,
1403 .vidioc_enum_framesizes = soc_camera_enum_framesizes,
1404 .vidioc_reqbufs = soc_camera_reqbufs,
1405 .vidioc_querybuf = soc_camera_querybuf,
1406 .vidioc_qbuf = soc_camera_qbuf,
1407 .vidioc_dqbuf = soc_camera_dqbuf,
1408 .vidioc_create_bufs = soc_camera_create_bufs,
1409 .vidioc_prepare_buf = soc_camera_prepare_buf,
1410 .vidioc_streamon = soc_camera_streamon,
1411 .vidioc_streamoff = soc_camera_streamoff,
1412 .vidioc_cropcap = soc_camera_cropcap,
1413 .vidioc_g_crop = soc_camera_g_crop,
1414 .vidioc_s_crop = soc_camera_s_crop,
1415 .vidioc_g_parm = soc_camera_g_parm,
1416 .vidioc_s_parm = soc_camera_s_parm,
1417 .vidioc_g_chip_ident = soc_camera_g_chip_ident,
1418#ifdef CONFIG_VIDEO_ADV_DEBUG
1419 .vidioc_g_register = soc_camera_g_register,
1420 .vidioc_s_register = soc_camera_s_register,
1421#endif
1422};
1423
1424static int video_dev_create(struct soc_camera_device *icd)
1425{
1426 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1427 struct video_device *vdev = video_device_alloc();
1428
1429 if (!vdev)
1430 return -ENOMEM;
1431
1432 strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name));
1433
1434 vdev->parent = icd->pdev;
1435 vdev->current_norm = V4L2_STD_UNKNOWN;
1436 vdev->fops = &soc_camera_fops;
1437 vdev->ioctl_ops = &soc_camera_ioctl_ops;
1438 vdev->release = video_device_release;
1439 vdev->tvnorms = V4L2_STD_UNKNOWN;
1440 vdev->ctrl_handler = &icd->ctrl_handler;
1441 vdev->lock = &icd->video_lock;
1442
1443 icd->vdev = vdev;
1444
1445 return 0;
1446}
1447
1448/*
1449 * Called from soc_camera_probe() above (with .video_lock held???)
1450 */
1451static int soc_camera_video_start(struct soc_camera_device *icd)
1452{
1453 const struct device_type *type = icd->vdev->dev.type;
1454 int ret;
1455
1456 if (!icd->parent)
1457 return -ENODEV;
1458
1459 ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1);
1460 if (ret < 0) {
1461 dev_err(icd->pdev, "video_register_device failed: %d\n", ret);
1462 return ret;
1463 }
1464
1465 /* Restore device type, possibly set by the subdevice driver */
1466 icd->vdev->dev.type = type;
1467
1468 return 0;
1469}
1470
1471static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev)
1472{
1473 struct soc_camera_link *icl = pdev->dev.platform_data;
1474 struct soc_camera_device *icd;
1475 int ret;
1476
1477 if (!icl)
1478 return -EINVAL;
1479
1480 icd = kzalloc(sizeof(*icd), GFP_KERNEL);
1481 if (!icd)
1482 return -ENOMEM;
1483
1484 icd->iface = icl->bus_id;
1485 icd->link = icl;
1486 icd->pdev = &pdev->dev;
1487 platform_set_drvdata(pdev, icd);
1488
1489 ret = soc_camera_device_register(icd);
1490 if (ret < 0)
1491 goto escdevreg;
1492
1493 icd->user_width = DEFAULT_WIDTH;
1494 icd->user_height = DEFAULT_HEIGHT;
1495
1496 return 0;
1497
1498escdevreg:
1499 kfree(icd);
1500
1501 return ret;
1502}
1503
1504/*
1505 * Only called on rmmod for each platform device, since they are not
1506 * hot-pluggable. Now we know, that all our users - hosts and devices have
1507 * been unloaded already
1508 */
1509static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev)
1510{
1511 struct soc_camera_device *icd = platform_get_drvdata(pdev);
1512
1513 if (!icd)
1514 return -EINVAL;
1515
1516 list_del(&icd->list);
1517
1518 kfree(icd);
1519
1520 return 0;
1521}
1522
1523static struct platform_driver __refdata soc_camera_pdrv = {
1524 .probe = soc_camera_pdrv_probe,
1525 .remove = __devexit_p(soc_camera_pdrv_remove),
1526 .driver = {
1527 .name = "soc-camera-pdrv",
1528 .owner = THIS_MODULE,
1529 },
1530};
1531
1532static int __init soc_camera_init(void)
1533{
1534 return platform_driver_register(&soc_camera_pdrv);
1535}
1536
1537static void __exit soc_camera_exit(void)
1538{
1539 platform_driver_unregister(&soc_camera_pdrv);
1540}
1541
1542module_init(soc_camera_init);
1543module_exit(soc_camera_exit);
1544
1545MODULE_DESCRIPTION("Image capture bus driver");
1546MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1547MODULE_LICENSE("GPL");
1548MODULE_ALIAS("platform:soc-camera-pdrv");
Linux kernel - Deliverables
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