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5e3274e557564194d07d6fbc6600aeaf21b138bf
[deliverable/linux.git] / drivers / media / video / soc_camera.c
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
49 static LIST_HEAD(hosts);
50 static LIST_HEAD(devices);
51 static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */
52
53 static 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->pdev, 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
79 esdpwr:
80 if (icl->power)
81 icl->power(icd->pdev, 0);
82 elinkpwr:
83 regulator_bulk_disable(icl->num_regulators,
84 icl->regulators);
85 return ret;
86 }
87
88 static 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->pdev, 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
114 const 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 }
124 EXPORT_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 */
132 unsigned 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 }
158 EXPORT_SYMBOL(soc_camera_apply_board_flags);
159
160 #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
161 ((x) >> 24) & 0xff
162
163 static 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 pix->bytesperline = 0;
175 pix->sizeimage = 0;
176
177 ret = ici->ops->try_fmt(icd, f);
178 if (ret < 0)
179 return ret;
180
181 xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
182 if (!xlate)
183 return -EINVAL;
184
185 ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt);
186 if (ret < 0)
187 return ret;
188
189 pix->bytesperline = max_t(u32, pix->bytesperline, ret);
190
191 ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline,
192 pix->height);
193 if (ret < 0)
194 return ret;
195
196 pix->sizeimage = max_t(u32, pix->sizeimage, ret);
197
198 return 0;
199 }
200
201 static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
202 struct v4l2_format *f)
203 {
204 struct soc_camera_device *icd = file->private_data;
205
206 WARN_ON(priv != file->private_data);
207
208 /* Only single-plane capture is supported so far */
209 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
210 return -EINVAL;
211
212 /* limit format to hardware capabilities */
213 return soc_camera_try_fmt(icd, f);
214 }
215
216 static int soc_camera_enum_input(struct file *file, void *priv,
217 struct v4l2_input *inp)
218 {
219 if (inp->index != 0)
220 return -EINVAL;
221
222 /* default is camera */
223 inp->type = V4L2_INPUT_TYPE_CAMERA;
224 inp->std = V4L2_STD_UNKNOWN;
225 strcpy(inp->name, "Camera");
226
227 return 0;
228 }
229
230 static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
231 {
232 *i = 0;
233
234 return 0;
235 }
236
237 static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
238 {
239 if (i > 0)
240 return -EINVAL;
241
242 return 0;
243 }
244
245 static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a)
246 {
247 struct soc_camera_device *icd = file->private_data;
248 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
249
250 return v4l2_subdev_call(sd, core, s_std, *a);
251 }
252
253 static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a)
254 {
255 struct soc_camera_device *icd = file->private_data;
256 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
257
258 return v4l2_subdev_call(sd, core, g_std, a);
259 }
260
261 static int soc_camera_enum_framesizes(struct file *file, void *fh,
262 struct v4l2_frmsizeenum *fsize)
263 {
264 struct soc_camera_device *icd = file->private_data;
265 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
266
267 return ici->ops->enum_framesizes(icd, fsize);
268 }
269
270 static int soc_camera_reqbufs(struct file *file, void *priv,
271 struct v4l2_requestbuffers *p)
272 {
273 int ret;
274 struct soc_camera_device *icd = file->private_data;
275 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
276
277 WARN_ON(priv != file->private_data);
278
279 if (icd->streamer && icd->streamer != file)
280 return -EBUSY;
281
282 if (ici->ops->init_videobuf) {
283 ret = videobuf_reqbufs(&icd->vb_vidq, p);
284 if (ret < 0)
285 return ret;
286
287 ret = ici->ops->reqbufs(icd, p);
288 } else {
289 ret = vb2_reqbufs(&icd->vb2_vidq, p);
290 }
291
292 if (!ret && !icd->streamer)
293 icd->streamer = file;
294
295 return ret;
296 }
297
298 static int soc_camera_querybuf(struct file *file, void *priv,
299 struct v4l2_buffer *p)
300 {
301 struct soc_camera_device *icd = file->private_data;
302 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
303
304 WARN_ON(priv != file->private_data);
305
306 if (ici->ops->init_videobuf)
307 return videobuf_querybuf(&icd->vb_vidq, p);
308 else
309 return vb2_querybuf(&icd->vb2_vidq, p);
310 }
311
312 static int soc_camera_qbuf(struct file *file, void *priv,
313 struct v4l2_buffer *p)
314 {
315 struct soc_camera_device *icd = file->private_data;
316 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
317
318 WARN_ON(priv != file->private_data);
319
320 if (icd->streamer != file)
321 return -EBUSY;
322
323 if (ici->ops->init_videobuf)
324 return videobuf_qbuf(&icd->vb_vidq, p);
325 else
326 return vb2_qbuf(&icd->vb2_vidq, p);
327 }
328
329 static int soc_camera_dqbuf(struct file *file, void *priv,
330 struct v4l2_buffer *p)
331 {
332 struct soc_camera_device *icd = file->private_data;
333 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
334
335 WARN_ON(priv != file->private_data);
336
337 if (icd->streamer != file)
338 return -EBUSY;
339
340 if (ici->ops->init_videobuf)
341 return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK);
342 else
343 return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK);
344 }
345
346 static int soc_camera_create_bufs(struct file *file, void *priv,
347 struct v4l2_create_buffers *create)
348 {
349 struct soc_camera_device *icd = file->private_data;
350 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
351
352 /* videobuf2 only */
353 if (ici->ops->init_videobuf)
354 return -EINVAL;
355 else
356 return vb2_create_bufs(&icd->vb2_vidq, create);
357 }
358
359 static int soc_camera_prepare_buf(struct file *file, void *priv,
360 struct v4l2_buffer *b)
361 {
362 struct soc_camera_device *icd = file->private_data;
363 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
364
365 /* videobuf2 only */
366 if (ici->ops->init_videobuf)
367 return -EINVAL;
368 else
369 return vb2_prepare_buf(&icd->vb2_vidq, b);
370 }
371
372 /* Always entered with .video_lock held */
373 static int soc_camera_init_user_formats(struct soc_camera_device *icd)
374 {
375 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
376 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
377 unsigned int i, fmts = 0, raw_fmts = 0;
378 int ret;
379 enum v4l2_mbus_pixelcode code;
380
381 while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code))
382 raw_fmts++;
383
384 if (!ici->ops->get_formats)
385 /*
386 * Fallback mode - the host will have to serve all
387 * sensor-provided formats one-to-one to the user
388 */
389 fmts = raw_fmts;
390 else
391 /*
392 * First pass - only count formats this host-sensor
393 * configuration can provide
394 */
395 for (i = 0; i < raw_fmts; i++) {
396 ret = ici->ops->get_formats(icd, i, NULL);
397 if (ret < 0)
398 return ret;
399 fmts += ret;
400 }
401
402 if (!fmts)
403 return -ENXIO;
404
405 icd->user_formats =
406 vmalloc(fmts * sizeof(struct soc_camera_format_xlate));
407 if (!icd->user_formats)
408 return -ENOMEM;
409
410 dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts);
411
412 /* Second pass - actually fill data formats */
413 fmts = 0;
414 for (i = 0; i < raw_fmts; i++)
415 if (!ici->ops->get_formats) {
416 v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code);
417 icd->user_formats[fmts].host_fmt =
418 soc_mbus_get_fmtdesc(code);
419 if (icd->user_formats[fmts].host_fmt)
420 icd->user_formats[fmts++].code = code;
421 } else {
422 ret = ici->ops->get_formats(icd, i,
423 &icd->user_formats[fmts]);
424 if (ret < 0)
425 goto egfmt;
426 fmts += ret;
427 }
428
429 icd->num_user_formats = fmts;
430 icd->current_fmt = &icd->user_formats[0];
431
432 return 0;
433
434 egfmt:
435 vfree(icd->user_formats);
436 return ret;
437 }
438
439 /* Always entered with .video_lock held */
440 static void soc_camera_free_user_formats(struct soc_camera_device *icd)
441 {
442 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
443
444 if (ici->ops->put_formats)
445 ici->ops->put_formats(icd);
446 icd->current_fmt = NULL;
447 icd->num_user_formats = 0;
448 vfree(icd->user_formats);
449 icd->user_formats = NULL;
450 }
451
452 /* Called with .vb_lock held, or from the first open(2), see comment there */
453 static int soc_camera_set_fmt(struct soc_camera_device *icd,
454 struct v4l2_format *f)
455 {
456 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
457 struct v4l2_pix_format *pix = &f->fmt.pix;
458 int ret;
459
460 dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n",
461 pixfmtstr(pix->pixelformat), pix->width, pix->height);
462
463 /* We always call try_fmt() before set_fmt() or set_crop() */
464 ret = soc_camera_try_fmt(icd, f);
465 if (ret < 0)
466 return ret;
467
468 ret = ici->ops->set_fmt(icd, f);
469 if (ret < 0) {
470 return ret;
471 } else if (!icd->current_fmt ||
472 icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
473 dev_err(icd->pdev,
474 "Host driver hasn't set up current format correctly!\n");
475 return -EINVAL;
476 }
477
478 icd->user_width = pix->width;
479 icd->user_height = pix->height;
480 icd->bytesperline = pix->bytesperline;
481 icd->sizeimage = pix->sizeimage;
482 icd->colorspace = pix->colorspace;
483 icd->field = pix->field;
484 if (ici->ops->init_videobuf)
485 icd->vb_vidq.field = pix->field;
486
487 dev_dbg(icd->pdev, "set width: %d height: %d\n",
488 icd->user_width, icd->user_height);
489
490 /* set physical bus parameters */
491 return ici->ops->set_bus_param(icd);
492 }
493
494 static int soc_camera_open(struct file *file)
495 {
496 struct video_device *vdev = video_devdata(file);
497 struct soc_camera_device *icd = dev_get_drvdata(vdev->parent);
498 struct soc_camera_link *icl = to_soc_camera_link(icd);
499 struct soc_camera_host *ici;
500 int ret;
501
502 if (!to_soc_camera_control(icd))
503 /* No device driver attached */
504 return -ENODEV;
505
506 ici = to_soc_camera_host(icd->parent);
507
508 if (!try_module_get(ici->ops->owner)) {
509 dev_err(icd->pdev, "Couldn't lock capture bus driver.\n");
510 return -EINVAL;
511 }
512
513 icd->use_count++;
514
515 /* Now we really have to activate the camera */
516 if (icd->use_count == 1) {
517 /* Restore parameters before the last close() per V4L2 API */
518 struct v4l2_format f = {
519 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
520 .fmt.pix = {
521 .width = icd->user_width,
522 .height = icd->user_height,
523 .field = icd->field,
524 .colorspace = icd->colorspace,
525 .pixelformat =
526 icd->current_fmt->host_fmt->fourcc,
527 },
528 };
529
530 /* The camera could have been already on, try to reset */
531 if (icl->reset)
532 icl->reset(icd->pdev);
533
534 /* Don't mess with the host during probe */
535 mutex_lock(&ici->host_lock);
536 ret = ici->ops->add(icd);
537 mutex_unlock(&ici->host_lock);
538 if (ret < 0) {
539 dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret);
540 goto eiciadd;
541 }
542
543 ret = soc_camera_power_on(icd, icl);
544 if (ret < 0)
545 goto epower;
546
547 pm_runtime_enable(&icd->vdev->dev);
548 ret = pm_runtime_resume(&icd->vdev->dev);
549 if (ret < 0 && ret != -ENOSYS)
550 goto eresume;
551
552 /*
553 * Try to configure with default parameters. Notice: this is the
554 * very first open, so, we cannot race against other calls,
555 * apart from someone else calling open() simultaneously, but
556 * .video_lock is protecting us against it.
557 */
558 ret = soc_camera_set_fmt(icd, &f);
559 if (ret < 0)
560 goto esfmt;
561
562 if (ici->ops->init_videobuf) {
563 ici->ops->init_videobuf(&icd->vb_vidq, icd);
564 } else {
565 ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd);
566 if (ret < 0)
567 goto einitvb;
568 }
569 v4l2_ctrl_handler_setup(&icd->ctrl_handler);
570 }
571
572 file->private_data = icd;
573 dev_dbg(icd->pdev, "camera device open\n");
574
575 return 0;
576
577 /*
578 * First four errors are entered with the .video_lock held
579 * and use_count == 1
580 */
581 einitvb:
582 esfmt:
583 pm_runtime_disable(&icd->vdev->dev);
584 eresume:
585 soc_camera_power_off(icd, icl);
586 epower:
587 ici->ops->remove(icd);
588 eiciadd:
589 icd->use_count--;
590 module_put(ici->ops->owner);
591
592 return ret;
593 }
594
595 static int soc_camera_close(struct file *file)
596 {
597 struct soc_camera_device *icd = file->private_data;
598 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
599
600 icd->use_count--;
601 if (!icd->use_count) {
602 struct soc_camera_link *icl = to_soc_camera_link(icd);
603
604 pm_runtime_suspend(&icd->vdev->dev);
605 pm_runtime_disable(&icd->vdev->dev);
606
607 if (ici->ops->init_videobuf2)
608 vb2_queue_release(&icd->vb2_vidq);
609 ici->ops->remove(icd);
610
611 soc_camera_power_off(icd, icl);
612 }
613
614 if (icd->streamer == file)
615 icd->streamer = NULL;
616
617 module_put(ici->ops->owner);
618
619 dev_dbg(icd->pdev, "camera device close\n");
620
621 return 0;
622 }
623
624 static ssize_t soc_camera_read(struct file *file, char __user *buf,
625 size_t count, loff_t *ppos)
626 {
627 struct soc_camera_device *icd = file->private_data;
628 int err = -EINVAL;
629
630 dev_err(icd->pdev, "camera device read not implemented\n");
631
632 return err;
633 }
634
635 static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)
636 {
637 struct soc_camera_device *icd = file->private_data;
638 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
639 int err;
640
641 dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
642
643 if (icd->streamer != file)
644 return -EBUSY;
645
646 if (ici->ops->init_videobuf)
647 err = videobuf_mmap_mapper(&icd->vb_vidq, vma);
648 else
649 err = vb2_mmap(&icd->vb2_vidq, vma);
650
651 dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n",
652 (unsigned long)vma->vm_start,
653 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start,
654 err);
655
656 return err;
657 }
658
659 static unsigned int soc_camera_poll(struct file *file, poll_table *pt)
660 {
661 struct soc_camera_device *icd = file->private_data;
662 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
663
664 if (icd->streamer != file)
665 return -EBUSY;
666
667 if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) {
668 dev_err(icd->pdev, "Trying to poll with no queued buffers!\n");
669 return POLLERR;
670 }
671
672 return ici->ops->poll(file, pt);
673 }
674
675 void soc_camera_lock(struct vb2_queue *vq)
676 {
677 struct soc_camera_device *icd = vb2_get_drv_priv(vq);
678 mutex_lock(&icd->video_lock);
679 }
680 EXPORT_SYMBOL(soc_camera_lock);
681
682 void soc_camera_unlock(struct vb2_queue *vq)
683 {
684 struct soc_camera_device *icd = vb2_get_drv_priv(vq);
685 mutex_unlock(&icd->video_lock);
686 }
687 EXPORT_SYMBOL(soc_camera_unlock);
688
689 static struct v4l2_file_operations soc_camera_fops = {
690 .owner = THIS_MODULE,
691 .open = soc_camera_open,
692 .release = soc_camera_close,
693 .unlocked_ioctl = video_ioctl2,
694 .read = soc_camera_read,
695 .mmap = soc_camera_mmap,
696 .poll = soc_camera_poll,
697 };
698
699 static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
700 struct v4l2_format *f)
701 {
702 struct soc_camera_device *icd = file->private_data;
703 int ret;
704
705 WARN_ON(priv != file->private_data);
706
707 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
708 dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type);
709 return -EINVAL;
710 }
711
712 if (icd->streamer && icd->streamer != file)
713 return -EBUSY;
714
715 if (is_streaming(to_soc_camera_host(icd->parent), icd)) {
716 dev_err(icd->pdev, "S_FMT denied: queue initialised\n");
717 return -EBUSY;
718 }
719
720 ret = soc_camera_set_fmt(icd, f);
721
722 if (!ret && !icd->streamer)
723 icd->streamer = file;
724
725 return ret;
726 }
727
728 static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv,
729 struct v4l2_fmtdesc *f)
730 {
731 struct soc_camera_device *icd = file->private_data;
732 const struct soc_mbus_pixelfmt *format;
733
734 WARN_ON(priv != file->private_data);
735
736 if (f->index >= icd->num_user_formats)
737 return -EINVAL;
738
739 format = icd->user_formats[f->index].host_fmt;
740
741 if (format->name)
742 strlcpy(f->description, format->name, sizeof(f->description));
743 f->pixelformat = format->fourcc;
744 return 0;
745 }
746
747 static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
748 struct v4l2_format *f)
749 {
750 struct soc_camera_device *icd = file->private_data;
751 struct v4l2_pix_format *pix = &f->fmt.pix;
752
753 WARN_ON(priv != file->private_data);
754
755 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
756 return -EINVAL;
757
758 pix->width = icd->user_width;
759 pix->height = icd->user_height;
760 pix->bytesperline = icd->bytesperline;
761 pix->sizeimage = icd->sizeimage;
762 pix->field = icd->field;
763 pix->pixelformat = icd->current_fmt->host_fmt->fourcc;
764 pix->colorspace = icd->colorspace;
765 dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n",
766 icd->current_fmt->host_fmt->fourcc);
767 return 0;
768 }
769
770 static int soc_camera_querycap(struct file *file, void *priv,
771 struct v4l2_capability *cap)
772 {
773 struct soc_camera_device *icd = file->private_data;
774 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
775
776 WARN_ON(priv != file->private_data);
777
778 strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver));
779 return ici->ops->querycap(ici, cap);
780 }
781
782 static int soc_camera_streamon(struct file *file, void *priv,
783 enum v4l2_buf_type i)
784 {
785 struct soc_camera_device *icd = file->private_data;
786 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
787 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
788 int ret;
789
790 WARN_ON(priv != file->private_data);
791
792 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
793 return -EINVAL;
794
795 if (icd->streamer != file)
796 return -EBUSY;
797
798 /* This calls buf_queue from host driver's videobuf_queue_ops */
799 if (ici->ops->init_videobuf)
800 ret = videobuf_streamon(&icd->vb_vidq);
801 else
802 ret = vb2_streamon(&icd->vb2_vidq, i);
803
804 if (!ret)
805 v4l2_subdev_call(sd, video, s_stream, 1);
806
807 return ret;
808 }
809
810 static int soc_camera_streamoff(struct file *file, void *priv,
811 enum v4l2_buf_type i)
812 {
813 struct soc_camera_device *icd = file->private_data;
814 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
815 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
816
817 WARN_ON(priv != file->private_data);
818
819 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
820 return -EINVAL;
821
822 if (icd->streamer != file)
823 return -EBUSY;
824
825 /*
826 * This calls buf_release from host driver's videobuf_queue_ops for all
827 * remaining buffers. When the last buffer is freed, stop capture
828 */
829 if (ici->ops->init_videobuf)
830 videobuf_streamoff(&icd->vb_vidq);
831 else
832 vb2_streamoff(&icd->vb2_vidq, i);
833
834 v4l2_subdev_call(sd, video, s_stream, 0);
835
836 return 0;
837 }
838
839 static int soc_camera_cropcap(struct file *file, void *fh,
840 struct v4l2_cropcap *a)
841 {
842 struct soc_camera_device *icd = file->private_data;
843 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
844
845 return ici->ops->cropcap(icd, a);
846 }
847
848 static int soc_camera_g_crop(struct file *file, void *fh,
849 struct v4l2_crop *a)
850 {
851 struct soc_camera_device *icd = file->private_data;
852 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
853 int ret;
854
855 ret = ici->ops->get_crop(icd, a);
856
857 return ret;
858 }
859
860 /*
861 * According to the V4L2 API, drivers shall not update the struct v4l2_crop
862 * argument with the actual geometry, instead, the user shall use G_CROP to
863 * retrieve it.
864 */
865 static int soc_camera_s_crop(struct file *file, void *fh,
866 struct v4l2_crop *a)
867 {
868 struct soc_camera_device *icd = file->private_data;
869 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
870 struct v4l2_rect *rect = &a->c;
871 struct v4l2_crop current_crop;
872 int ret;
873
874 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
875 return -EINVAL;
876
877 dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n",
878 rect->width, rect->height, rect->left, rect->top);
879
880 /* If get_crop fails, we'll let host and / or client drivers decide */
881 ret = ici->ops->get_crop(icd, &current_crop);
882
883 /* Prohibit window size change with initialised buffers */
884 if (ret < 0) {
885 dev_err(icd->pdev,
886 "S_CROP denied: getting current crop failed\n");
887 } else if ((a->c.width == current_crop.c.width &&
888 a->c.height == current_crop.c.height) ||
889 !is_streaming(ici, icd)) {
890 /* same size or not streaming - use .set_crop() */
891 ret = ici->ops->set_crop(icd, a);
892 } else if (ici->ops->set_livecrop) {
893 ret = ici->ops->set_livecrop(icd, a);
894 } else {
895 dev_err(icd->pdev,
896 "S_CROP denied: queue initialised and sizes differ\n");
897 ret = -EBUSY;
898 }
899
900 return ret;
901 }
902
903 static int soc_camera_g_parm(struct file *file, void *fh,
904 struct v4l2_streamparm *a)
905 {
906 struct soc_camera_device *icd = file->private_data;
907 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
908
909 if (ici->ops->get_parm)
910 return ici->ops->get_parm(icd, a);
911
912 return -ENOIOCTLCMD;
913 }
914
915 static int soc_camera_s_parm(struct file *file, void *fh,
916 struct v4l2_streamparm *a)
917 {
918 struct soc_camera_device *icd = file->private_data;
919 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
920
921 if (ici->ops->set_parm)
922 return ici->ops->set_parm(icd, a);
923
924 return -ENOIOCTLCMD;
925 }
926
927 static int soc_camera_g_chip_ident(struct file *file, void *fh,
928 struct v4l2_dbg_chip_ident *id)
929 {
930 struct soc_camera_device *icd = file->private_data;
931 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
932
933 return v4l2_subdev_call(sd, core, g_chip_ident, id);
934 }
935
936 #ifdef CONFIG_VIDEO_ADV_DEBUG
937 static int soc_camera_g_register(struct file *file, void *fh,
938 struct v4l2_dbg_register *reg)
939 {
940 struct soc_camera_device *icd = file->private_data;
941 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
942
943 return v4l2_subdev_call(sd, core, g_register, reg);
944 }
945
946 static int soc_camera_s_register(struct file *file, void *fh,
947 struct v4l2_dbg_register *reg)
948 {
949 struct soc_camera_device *icd = file->private_data;
950 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
951
952 return v4l2_subdev_call(sd, core, s_register, reg);
953 }
954 #endif
955
956 static int soc_camera_probe(struct soc_camera_device *icd);
957
958 /* So far this function cannot fail */
959 static void scan_add_host(struct soc_camera_host *ici)
960 {
961 struct soc_camera_device *icd;
962
963 mutex_lock(&ici->host_lock);
964
965 list_for_each_entry(icd, &devices, list) {
966 if (icd->iface == ici->nr) {
967 int ret;
968
969 icd->parent = ici->v4l2_dev.dev;
970 ret = soc_camera_probe(icd);
971 }
972 }
973
974 mutex_unlock(&ici->host_lock);
975 }
976
977 #ifdef CONFIG_I2C_BOARDINFO
978 static int soc_camera_init_i2c(struct soc_camera_device *icd,
979 struct soc_camera_link *icl)
980 {
981 struct i2c_client *client;
982 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
983 struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id);
984 struct v4l2_subdev *subdev;
985
986 if (!adap) {
987 dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n",
988 icl->i2c_adapter_id);
989 goto ei2cga;
990 }
991
992 icl->board_info->platform_data = icl;
993
994 subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap,
995 icl->board_info, NULL);
996 if (!subdev)
997 goto ei2cnd;
998
999 client = v4l2_get_subdevdata(subdev);
1000
1001 /* Use to_i2c_client(dev) to recover the i2c client */
1002 icd->control = &client->dev;
1003
1004 return 0;
1005 ei2cnd:
1006 i2c_put_adapter(adap);
1007 ei2cga:
1008 return -ENODEV;
1009 }
1010
1011 static void soc_camera_free_i2c(struct soc_camera_device *icd)
1012 {
1013 struct i2c_client *client =
1014 to_i2c_client(to_soc_camera_control(icd));
1015 struct i2c_adapter *adap = client->adapter;
1016
1017 icd->control = NULL;
1018 v4l2_device_unregister_subdev(i2c_get_clientdata(client));
1019 i2c_unregister_device(client);
1020 i2c_put_adapter(adap);
1021 }
1022 #else
1023 #define soc_camera_init_i2c(icd, icl) (-ENODEV)
1024 #define soc_camera_free_i2c(icd) do {} while (0)
1025 #endif
1026
1027 static int soc_camera_video_start(struct soc_camera_device *icd);
1028 static int video_dev_create(struct soc_camera_device *icd);
1029 /* Called during host-driver probe */
1030 static int soc_camera_probe(struct soc_camera_device *icd)
1031 {
1032 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1033 struct soc_camera_link *icl = to_soc_camera_link(icd);
1034 struct device *control = NULL;
1035 struct v4l2_subdev *sd;
1036 struct v4l2_mbus_framefmt mf;
1037 int ret;
1038
1039 dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev));
1040
1041 /*
1042 * Currently the subdev with the largest number of controls (13) is
1043 * ov6550. So let's pick 16 as a hint for the control handler. Note
1044 * that this is a hint only: too large and you waste some memory, too
1045 * small and there is a (very) small performance hit when looking up
1046 * controls in the internal hash.
1047 */
1048 ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16);
1049 if (ret < 0)
1050 return ret;
1051
1052 ret = regulator_bulk_get(icd->pdev, icl->num_regulators,
1053 icl->regulators);
1054 if (ret < 0)
1055 goto ereg;
1056
1057 /* The camera could have been already on, try to reset */
1058 if (icl->reset)
1059 icl->reset(icd->pdev);
1060
1061 ret = ici->ops->add(icd);
1062 if (ret < 0)
1063 goto eadd;
1064
1065 /*
1066 * This will not yet call v4l2_subdev_core_ops::s_power(1), because the
1067 * subdevice has not been initialised yet. We'll have to call it once
1068 * again after initialisation, even though it shouldn't be needed, we
1069 * don't do any IO here.
1070 */
1071 ret = soc_camera_power_on(icd, icl);
1072 if (ret < 0)
1073 goto epower;
1074
1075 /* Must have icd->vdev before registering the device */
1076 ret = video_dev_create(icd);
1077 if (ret < 0)
1078 goto evdc;
1079
1080 /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */
1081 if (icl->board_info) {
1082 ret = soc_camera_init_i2c(icd, icl);
1083 if (ret < 0)
1084 goto eadddev;
1085 } else if (!icl->add_device || !icl->del_device) {
1086 ret = -EINVAL;
1087 goto eadddev;
1088 } else {
1089 if (icl->module_name)
1090 ret = request_module(icl->module_name);
1091
1092 ret = icl->add_device(icd);
1093 if (ret < 0)
1094 goto eadddev;
1095
1096 /*
1097 * FIXME: this is racy, have to use driver-binding notification,
1098 * when it is available
1099 */
1100 control = to_soc_camera_control(icd);
1101 if (!control || !control->driver || !dev_get_drvdata(control) ||
1102 !try_module_get(control->driver->owner)) {
1103 icl->del_device(icd);
1104 ret = -ENODEV;
1105 goto enodrv;
1106 }
1107 }
1108
1109 sd = soc_camera_to_subdev(icd);
1110 sd->grp_id = soc_camera_grp_id(icd);
1111 v4l2_set_subdev_hostdata(sd, icd);
1112
1113 if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler))
1114 goto ectrl;
1115
1116 /* At this point client .probe() should have run already */
1117 ret = soc_camera_init_user_formats(icd);
1118 if (ret < 0)
1119 goto eiufmt;
1120
1121 icd->field = V4L2_FIELD_ANY;
1122
1123 /*
1124 * ..._video_start() will create a device node, video_register_device()
1125 * itself is protected against concurrent open() calls, but we also have
1126 * to protect our data.
1127 */
1128 mutex_lock(&icd->video_lock);
1129
1130 ret = soc_camera_video_start(icd);
1131 if (ret < 0)
1132 goto evidstart;
1133
1134 ret = v4l2_subdev_call(sd, core, s_power, 1);
1135 if (ret < 0 && ret != -ENOIOCTLCMD)
1136 goto esdpwr;
1137
1138 /* Try to improve our guess of a reasonable window format */
1139 if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) {
1140 icd->user_width = mf.width;
1141 icd->user_height = mf.height;
1142 icd->colorspace = mf.colorspace;
1143 icd->field = mf.field;
1144 }
1145
1146 ici->ops->remove(icd);
1147
1148 soc_camera_power_off(icd, icl);
1149
1150 mutex_unlock(&icd->video_lock);
1151
1152 return 0;
1153
1154 esdpwr:
1155 video_unregister_device(icd->vdev);
1156 evidstart:
1157 mutex_unlock(&icd->video_lock);
1158 soc_camera_free_user_formats(icd);
1159 eiufmt:
1160 ectrl:
1161 if (icl->board_info) {
1162 soc_camera_free_i2c(icd);
1163 } else {
1164 icl->del_device(icd);
1165 module_put(control->driver->owner);
1166 }
1167 enodrv:
1168 eadddev:
1169 video_device_release(icd->vdev);
1170 icd->vdev = NULL;
1171 evdc:
1172 soc_camera_power_off(icd, icl);
1173 epower:
1174 ici->ops->remove(icd);
1175 eadd:
1176 regulator_bulk_free(icl->num_regulators, icl->regulators);
1177 ereg:
1178 v4l2_ctrl_handler_free(&icd->ctrl_handler);
1179 return ret;
1180 }
1181
1182 /*
1183 * This is called on device_unregister, which only means we have to disconnect
1184 * from the host, but not remove ourselves from the device list
1185 */
1186 static int soc_camera_remove(struct soc_camera_device *icd)
1187 {
1188 struct soc_camera_link *icl = to_soc_camera_link(icd);
1189 struct video_device *vdev = icd->vdev;
1190
1191 BUG_ON(!icd->parent);
1192
1193 v4l2_ctrl_handler_free(&icd->ctrl_handler);
1194 if (vdev) {
1195 video_unregister_device(vdev);
1196 icd->vdev = NULL;
1197 }
1198
1199 if (icl->board_info) {
1200 soc_camera_free_i2c(icd);
1201 } else {
1202 struct device_driver *drv = to_soc_camera_control(icd)->driver;
1203 if (drv) {
1204 icl->del_device(icd);
1205 module_put(drv->owner);
1206 }
1207 }
1208 soc_camera_free_user_formats(icd);
1209
1210 regulator_bulk_free(icl->num_regulators, icl->regulators);
1211
1212 return 0;
1213 }
1214
1215 static int default_cropcap(struct soc_camera_device *icd,
1216 struct v4l2_cropcap *a)
1217 {
1218 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1219 return v4l2_subdev_call(sd, video, cropcap, a);
1220 }
1221
1222 static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1223 {
1224 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1225 return v4l2_subdev_call(sd, video, g_crop, a);
1226 }
1227
1228 static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1229 {
1230 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1231 return v4l2_subdev_call(sd, video, s_crop, a);
1232 }
1233
1234 static int default_g_parm(struct soc_camera_device *icd,
1235 struct v4l2_streamparm *parm)
1236 {
1237 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1238 return v4l2_subdev_call(sd, video, g_parm, parm);
1239 }
1240
1241 static int default_s_parm(struct soc_camera_device *icd,
1242 struct v4l2_streamparm *parm)
1243 {
1244 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1245 return v4l2_subdev_call(sd, video, s_parm, parm);
1246 }
1247
1248 static int default_enum_framesizes(struct soc_camera_device *icd,
1249 struct v4l2_frmsizeenum *fsize)
1250 {
1251 int ret;
1252 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1253 const struct soc_camera_format_xlate *xlate;
1254 __u32 pixfmt = fsize->pixel_format;
1255 struct v4l2_frmsizeenum fsize_mbus = *fsize;
1256
1257 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1258 if (!xlate)
1259 return -EINVAL;
1260 /* map xlate-code to pixel_format, sensor only handle xlate-code*/
1261 fsize_mbus.pixel_format = xlate->code;
1262
1263 ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &fsize_mbus);
1264 if (ret < 0)
1265 return ret;
1266
1267 *fsize = fsize_mbus;
1268 fsize->pixel_format = pixfmt;
1269
1270 return 0;
1271 }
1272
1273 int soc_camera_host_register(struct soc_camera_host *ici)
1274 {
1275 struct soc_camera_host *ix;
1276 int ret;
1277
1278 if (!ici || !ici->ops ||
1279 !ici->ops->try_fmt ||
1280 !ici->ops->set_fmt ||
1281 !ici->ops->set_bus_param ||
1282 !ici->ops->querycap ||
1283 ((!ici->ops->init_videobuf ||
1284 !ici->ops->reqbufs) &&
1285 !ici->ops->init_videobuf2) ||
1286 !ici->ops->add ||
1287 !ici->ops->remove ||
1288 !ici->ops->poll ||
1289 !ici->v4l2_dev.dev)
1290 return -EINVAL;
1291
1292 if (!ici->ops->set_crop)
1293 ici->ops->set_crop = default_s_crop;
1294 if (!ici->ops->get_crop)
1295 ici->ops->get_crop = default_g_crop;
1296 if (!ici->ops->cropcap)
1297 ici->ops->cropcap = default_cropcap;
1298 if (!ici->ops->set_parm)
1299 ici->ops->set_parm = default_s_parm;
1300 if (!ici->ops->get_parm)
1301 ici->ops->get_parm = default_g_parm;
1302 if (!ici->ops->enum_framesizes)
1303 ici->ops->enum_framesizes = default_enum_framesizes;
1304
1305 mutex_lock(&list_lock);
1306 list_for_each_entry(ix, &hosts, list) {
1307 if (ix->nr == ici->nr) {
1308 ret = -EBUSY;
1309 goto edevreg;
1310 }
1311 }
1312
1313 ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev);
1314 if (ret < 0)
1315 goto edevreg;
1316
1317 list_add_tail(&ici->list, &hosts);
1318 mutex_unlock(&list_lock);
1319
1320 mutex_init(&ici->host_lock);
1321 scan_add_host(ici);
1322
1323 return 0;
1324
1325 edevreg:
1326 mutex_unlock(&list_lock);
1327 return ret;
1328 }
1329 EXPORT_SYMBOL(soc_camera_host_register);
1330
1331 /* Unregister all clients! */
1332 void soc_camera_host_unregister(struct soc_camera_host *ici)
1333 {
1334 struct soc_camera_device *icd;
1335
1336 mutex_lock(&list_lock);
1337
1338 list_del(&ici->list);
1339 list_for_each_entry(icd, &devices, list)
1340 if (icd->iface == ici->nr && to_soc_camera_control(icd))
1341 soc_camera_remove(icd);
1342
1343 mutex_unlock(&list_lock);
1344
1345 v4l2_device_unregister(&ici->v4l2_dev);
1346 }
1347 EXPORT_SYMBOL(soc_camera_host_unregister);
1348
1349 /* Image capture device */
1350 static int soc_camera_device_register(struct soc_camera_device *icd)
1351 {
1352 struct soc_camera_device *ix;
1353 int num = -1, i;
1354
1355 for (i = 0; i < 256 && num < 0; i++) {
1356 num = i;
1357 /* Check if this index is available on this interface */
1358 list_for_each_entry(ix, &devices, list) {
1359 if (ix->iface == icd->iface && ix->devnum == i) {
1360 num = -1;
1361 break;
1362 }
1363 }
1364 }
1365
1366 if (num < 0)
1367 /*
1368 * ok, we have 256 cameras on this host...
1369 * man, stay reasonable...
1370 */
1371 return -ENOMEM;
1372
1373 icd->devnum = num;
1374 icd->use_count = 0;
1375 icd->host_priv = NULL;
1376 mutex_init(&icd->video_lock);
1377
1378 list_add_tail(&icd->list, &devices);
1379
1380 return 0;
1381 }
1382
1383 static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = {
1384 .vidioc_querycap = soc_camera_querycap,
1385 .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap,
1386 .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap,
1387 .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap,
1388 .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap,
1389 .vidioc_enum_input = soc_camera_enum_input,
1390 .vidioc_g_input = soc_camera_g_input,
1391 .vidioc_s_input = soc_camera_s_input,
1392 .vidioc_s_std = soc_camera_s_std,
1393 .vidioc_g_std = soc_camera_g_std,
1394 .vidioc_enum_framesizes = soc_camera_enum_framesizes,
1395 .vidioc_reqbufs = soc_camera_reqbufs,
1396 .vidioc_querybuf = soc_camera_querybuf,
1397 .vidioc_qbuf = soc_camera_qbuf,
1398 .vidioc_dqbuf = soc_camera_dqbuf,
1399 .vidioc_create_bufs = soc_camera_create_bufs,
1400 .vidioc_prepare_buf = soc_camera_prepare_buf,
1401 .vidioc_streamon = soc_camera_streamon,
1402 .vidioc_streamoff = soc_camera_streamoff,
1403 .vidioc_cropcap = soc_camera_cropcap,
1404 .vidioc_g_crop = soc_camera_g_crop,
1405 .vidioc_s_crop = soc_camera_s_crop,
1406 .vidioc_g_parm = soc_camera_g_parm,
1407 .vidioc_s_parm = soc_camera_s_parm,
1408 .vidioc_g_chip_ident = soc_camera_g_chip_ident,
1409 #ifdef CONFIG_VIDEO_ADV_DEBUG
1410 .vidioc_g_register = soc_camera_g_register,
1411 .vidioc_s_register = soc_camera_s_register,
1412 #endif
1413 };
1414
1415 static int video_dev_create(struct soc_camera_device *icd)
1416 {
1417 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1418 struct video_device *vdev = video_device_alloc();
1419
1420 if (!vdev)
1421 return -ENOMEM;
1422
1423 strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name));
1424
1425 vdev->parent = icd->pdev;
1426 vdev->current_norm = V4L2_STD_UNKNOWN;
1427 vdev->fops = &soc_camera_fops;
1428 vdev->ioctl_ops = &soc_camera_ioctl_ops;
1429 vdev->release = video_device_release;
1430 vdev->tvnorms = V4L2_STD_UNKNOWN;
1431 vdev->ctrl_handler = &icd->ctrl_handler;
1432 vdev->lock = &icd->video_lock;
1433 /* Locking in file operations other than ioctl should be done
1434 by the driver, not the V4L2 core.
1435 This driver needs auditing so that this flag can be removed. */
1436 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags);
1437
1438 icd->vdev = vdev;
1439
1440 return 0;
1441 }
1442
1443 /*
1444 * Called from soc_camera_probe() above (with .video_lock held???)
1445 */
1446 static int soc_camera_video_start(struct soc_camera_device *icd)
1447 {
1448 const struct device_type *type = icd->vdev->dev.type;
1449 int ret;
1450
1451 if (!icd->parent)
1452 return -ENODEV;
1453
1454 ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1);
1455 if (ret < 0) {
1456 dev_err(icd->pdev, "video_register_device failed: %d\n", ret);
1457 return ret;
1458 }
1459
1460 /* Restore device type, possibly set by the subdevice driver */
1461 icd->vdev->dev.type = type;
1462
1463 return 0;
1464 }
1465
1466 static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev)
1467 {
1468 struct soc_camera_link *icl = pdev->dev.platform_data;
1469 struct soc_camera_device *icd;
1470 int ret;
1471
1472 if (!icl)
1473 return -EINVAL;
1474
1475 icd = kzalloc(sizeof(*icd), GFP_KERNEL);
1476 if (!icd)
1477 return -ENOMEM;
1478
1479 icd->iface = icl->bus_id;
1480 icd->link = icl;
1481 icd->pdev = &pdev->dev;
1482 platform_set_drvdata(pdev, icd);
1483
1484 ret = soc_camera_device_register(icd);
1485 if (ret < 0)
1486 goto escdevreg;
1487
1488 icd->user_width = DEFAULT_WIDTH;
1489 icd->user_height = DEFAULT_HEIGHT;
1490
1491 return 0;
1492
1493 escdevreg:
1494 kfree(icd);
1495
1496 return ret;
1497 }
1498
1499 /*
1500 * Only called on rmmod for each platform device, since they are not
1501 * hot-pluggable. Now we know, that all our users - hosts and devices have
1502 * been unloaded already
1503 */
1504 static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev)
1505 {
1506 struct soc_camera_device *icd = platform_get_drvdata(pdev);
1507
1508 if (!icd)
1509 return -EINVAL;
1510
1511 list_del(&icd->list);
1512
1513 kfree(icd);
1514
1515 return 0;
1516 }
1517
1518 static struct platform_driver __refdata soc_camera_pdrv = {
1519 .remove = __devexit_p(soc_camera_pdrv_remove),
1520 .driver = {
1521 .name = "soc-camera-pdrv",
1522 .owner = THIS_MODULE,
1523 },
1524 };
1525
1526 static int __init soc_camera_init(void)
1527 {
1528 return platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe);
1529 }
1530
1531 static void __exit soc_camera_exit(void)
1532 {
1533 platform_driver_unregister(&soc_camera_pdrv);
1534 }
1535
1536 module_init(soc_camera_init);
1537 module_exit(soc_camera_exit);
1538
1539 MODULE_DESCRIPTION("Image capture bus driver");
1540 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1541 MODULE_LICENSE("GPL");
1542 MODULE_ALIAS("platform:soc-camera-pdrv");
Linux kernel - Deliverables
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