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sfc: Disable setting feature flags that are not implemented
[linux-2.6/x86.git] / drivers / media / video / soc_camera.c
blobdb1ca0e90d7611e80905339d7730c2dc00668b86
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/slab.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/vmalloc.h>
30
31 #include <media/soc_camera.h>
32 #include <media/v4l2-common.h>
33 #include <media/v4l2-ioctl.h>
34 #include <media/v4l2-dev.h>
35 #include <media/videobuf-core.h>
36 #include <media/soc_mediabus.h>
37
38 /* Default to VGA resolution */
39 #define DEFAULT_WIDTH 640
40 #define DEFAULT_HEIGHT 480
41
42 static LIST_HEAD(hosts);
43 static LIST_HEAD(devices);
44 static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */
45
46 const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
47 struct soc_camera_device *icd, unsigned int fourcc)
48 {
49 unsigned int i;
50
51 for (i = 0; i < icd->num_user_formats; i++)
52 if (icd->user_formats[i].host_fmt->fourcc == fourcc)
53 return icd->user_formats + i;
54 return NULL;
55 }
56 EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
57
58 /**
59 * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags
60 * @icl: camera platform parameters
61 * @flags: flags to be inverted according to platform configuration
62 * @return: resulting flags
63 */
64 unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl,
65 unsigned long flags)
66 {
67 unsigned long f;
68
69 /* If only one of the two polarities is supported, switch to the opposite */
70 if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) {
71 f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
72 if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW)
73 flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW;
74 }
75
76 if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) {
77 f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
78 if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW)
79 flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW;
80 }
81
82 if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) {
83 f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
84 if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING)
85 flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING;
86 }
87
88 return flags;
89 }
90 EXPORT_SYMBOL(soc_camera_apply_sensor_flags);
91
92 static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
93 struct v4l2_format *f)
94 {
95 struct soc_camera_file *icf = file->private_data;
96 struct soc_camera_device *icd = icf->icd;
97 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
98
99 WARN_ON(priv != file->private_data);
100
101 /* limit format to hardware capabilities */
102 return ici->ops->try_fmt(icd, f);
103 }
104
105 static int soc_camera_enum_input(struct file *file, void *priv,
106 struct v4l2_input *inp)
107 {
108 struct soc_camera_file *icf = file->private_data;
109 struct soc_camera_device *icd = icf->icd;
110 int ret = 0;
111
112 if (inp->index != 0)
113 return -EINVAL;
114
115 if (icd->ops->enum_input)
116 ret = icd->ops->enum_input(icd, inp);
117 else {
118 /* default is camera */
119 inp->type = V4L2_INPUT_TYPE_CAMERA;
120 inp->std = V4L2_STD_UNKNOWN;
121 strcpy(inp->name, "Camera");
122 }
123
124 return ret;
125 }
126
127 static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
128 {
129 *i = 0;
130
131 return 0;
132 }
133
134 static int soc_camera_s_input(struct file *file, void *priv, unsigned int i)
135 {
136 if (i > 0)
137 return -EINVAL;
138
139 return 0;
140 }
141
142 static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a)
143 {
144 struct soc_camera_file *icf = file->private_data;
145 struct soc_camera_device *icd = icf->icd;
146 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
147
148 return v4l2_subdev_call(sd, core, s_std, *a);
149 }
150
151 static int soc_camera_reqbufs(struct file *file, void *priv,
152 struct v4l2_requestbuffers *p)
153 {
154 int ret;
155 struct soc_camera_file *icf = file->private_data;
156 struct soc_camera_device *icd = icf->icd;
157 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
158
159 WARN_ON(priv != file->private_data);
160
161 ret = videobuf_reqbufs(&icf->vb_vidq, p);
162 if (ret < 0)
163 return ret;
164
165 return ici->ops->reqbufs(icf, p);
166 }
167
168 static int soc_camera_querybuf(struct file *file, void *priv,
169 struct v4l2_buffer *p)
170 {
171 struct soc_camera_file *icf = file->private_data;
172
173 WARN_ON(priv != file->private_data);
174
175 return videobuf_querybuf(&icf->vb_vidq, p);
176 }
177
178 static int soc_camera_qbuf(struct file *file, void *priv,
179 struct v4l2_buffer *p)
180 {
181 struct soc_camera_file *icf = file->private_data;
182
183 WARN_ON(priv != file->private_data);
184
185 return videobuf_qbuf(&icf->vb_vidq, p);
186 }
187
188 static int soc_camera_dqbuf(struct file *file, void *priv,
189 struct v4l2_buffer *p)
190 {
191 struct soc_camera_file *icf = file->private_data;
192
193 WARN_ON(priv != file->private_data);
194
195 return videobuf_dqbuf(&icf->vb_vidq, p, file->f_flags & O_NONBLOCK);
196 }
197
198 /* Always entered with .video_lock held */
199 static int soc_camera_init_user_formats(struct soc_camera_device *icd)
200 {
201 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
202 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
203 int i, fmts = 0, raw_fmts = 0, ret;
204 enum v4l2_mbus_pixelcode code;
205
206 while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code))
207 raw_fmts++;
208
209 if (!ici->ops->get_formats)
210 /*
211 * Fallback mode - the host will have to serve all
212 * sensor-provided formats one-to-one to the user
213 */
214 fmts = raw_fmts;
215 else
216 /*
217 * First pass - only count formats this host-sensor
218 * configuration can provide
219 */
220 for (i = 0; i < raw_fmts; i++) {
221 ret = ici->ops->get_formats(icd, i, NULL);
222 if (ret < 0)
223 return ret;
224 fmts += ret;
225 }
226
227 if (!fmts)
228 return -ENXIO;
229
230 icd->user_formats =
231 vmalloc(fmts * sizeof(struct soc_camera_format_xlate));
232 if (!icd->user_formats)
233 return -ENOMEM;
234
235 icd->num_user_formats = fmts;
236
237 dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts);
238
239 /* Second pass - actually fill data formats */
240 fmts = 0;
241 for (i = 0; i < raw_fmts; i++)
242 if (!ici->ops->get_formats) {
243 v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code);
244 icd->user_formats[i].host_fmt =
245 soc_mbus_get_fmtdesc(code);
246 icd->user_formats[i].code = code;
247 } else {
248 ret = ici->ops->get_formats(icd, i,
249 &icd->user_formats[fmts]);
250 if (ret < 0)
251 goto egfmt;
252 fmts += ret;
253 }
254
255 icd->current_fmt = &icd->user_formats[0];
256
257 return 0;
258
259 egfmt:
260 icd->num_user_formats = 0;
261 vfree(icd->user_formats);
262 return ret;
263 }
264
265 /* Always entered with .video_lock held */
266 static void soc_camera_free_user_formats(struct soc_camera_device *icd)
267 {
268 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
269
270 if (ici->ops->put_formats)
271 ici->ops->put_formats(icd);
272 icd->current_fmt = NULL;
273 icd->num_user_formats = 0;
274 vfree(icd->user_formats);
275 icd->user_formats = NULL;
276 }
277
278 #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \
279 ((x) >> 24) & 0xff
280
281 /* Called with .vb_lock held, or from the first open(2), see comment there */
282 static int soc_camera_set_fmt(struct soc_camera_file *icf,
283 struct v4l2_format *f)
284 {
285 struct soc_camera_device *icd = icf->icd;
286 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
287 struct v4l2_pix_format *pix = &f->fmt.pix;
288 int ret;
289
290 dev_dbg(&icd->dev, "S_FMT(%c%c%c%c, %ux%u)\n",
291 pixfmtstr(pix->pixelformat), pix->width, pix->height);
292
293 /* We always call try_fmt() before set_fmt() or set_crop() */
294 ret = ici->ops->try_fmt(icd, f);
295 if (ret < 0)
296 return ret;
297
298 ret = ici->ops->set_fmt(icd, f);
299 if (ret < 0) {
300 return ret;
301 } else if (!icd->current_fmt ||
302 icd->current_fmt->host_fmt->fourcc != pix->pixelformat) {
303 dev_err(&icd->dev,
304 "Host driver hasn't set up current format correctly!\n");
305 return -EINVAL;
306 }
307
308 icd->user_width = pix->width;
309 icd->user_height = pix->height;
310 icd->colorspace = pix->colorspace;
311 icf->vb_vidq.field =
312 icd->field = pix->field;
313
314 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
315 dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n",
316 f->type);
317
318 dev_dbg(&icd->dev, "set width: %d height: %d\n",
319 icd->user_width, icd->user_height);
320
321 /* set physical bus parameters */
322 return ici->ops->set_bus_param(icd, pix->pixelformat);
323 }
324
325 static int soc_camera_open(struct file *file)
326 {
327 struct video_device *vdev = video_devdata(file);
328 struct soc_camera_device *icd = container_of(vdev->parent,
329 struct soc_camera_device,
330 dev);
331 struct soc_camera_link *icl = to_soc_camera_link(icd);
332 struct soc_camera_host *ici;
333 struct soc_camera_file *icf;
334 int ret;
335
336 if (!icd->ops)
337 /* No device driver attached */
338 return -ENODEV;
339
340 ici = to_soc_camera_host(icd->dev.parent);
341
342 icf = vmalloc(sizeof(*icf));
343 if (!icf)
344 return -ENOMEM;
345
346 if (!try_module_get(ici->ops->owner)) {
347 dev_err(&icd->dev, "Couldn't lock capture bus driver.\n");
348 ret = -EINVAL;
349 goto emgi;
350 }
351
352 /*
353 * Protect against icd->ops->remove() until we module_get() both
354 * drivers.
355 */
356 mutex_lock(&icd->video_lock);
357
358 icf->icd = icd;
359 icd->use_count++;
360
361 /* Now we really have to activate the camera */
362 if (icd->use_count == 1) {
363 /* Restore parameters before the last close() per V4L2 API */
364 struct v4l2_format f = {
365 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
366 .fmt.pix = {
367 .width = icd->user_width,
368 .height = icd->user_height,
369 .field = icd->field,
370 .colorspace = icd->colorspace,
371 .pixelformat =
372 icd->current_fmt->host_fmt->fourcc,
373 },
374 };
375
376 if (icl->power) {
377 ret = icl->power(icd->pdev, 1);
378 if (ret < 0)
379 goto epower;
380 }
381
382 /* The camera could have been already on, try to reset */
383 if (icl->reset)
384 icl->reset(icd->pdev);
385
386 ret = ici->ops->add(icd);
387 if (ret < 0) {
388 dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret);
389 goto eiciadd;
390 }
391
392 pm_runtime_enable(&icd->vdev->dev);
393 ret = pm_runtime_resume(&icd->vdev->dev);
394 if (ret < 0 && ret != -ENOSYS)
395 goto eresume;
396
397 /*
398 * Try to configure with default parameters. Notice: this is the
399 * very first open, so, we cannot race against other calls,
400 * apart from someone else calling open() simultaneously, but
401 * .video_lock is protecting us against it.
402 */
403 ret = soc_camera_set_fmt(icf, &f);
404 if (ret < 0)
405 goto esfmt;
406 }
407
408 file->private_data = icf;
409 dev_dbg(&icd->dev, "camera device open\n");
410
411 ici->ops->init_videobuf(&icf->vb_vidq, icd);
412
413 mutex_unlock(&icd->video_lock);
414
415 return 0;
416
417 /*
418 * First four errors are entered with the .video_lock held
419 * and use_count == 1
420 */
421 esfmt:
422 pm_runtime_disable(&icd->vdev->dev);
423 eresume:
424 ici->ops->remove(icd);
425 eiciadd:
426 if (icl->power)
427 icl->power(icd->pdev, 0);
428 epower:
429 icd->use_count--;
430 mutex_unlock(&icd->video_lock);
431 module_put(ici->ops->owner);
432 emgi:
433 vfree(icf);
434 return ret;
435 }
436
437 static int soc_camera_close(struct file *file)
438 {
439 struct soc_camera_file *icf = file->private_data;
440 struct soc_camera_device *icd = icf->icd;
441 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
442
443 mutex_lock(&icd->video_lock);
444 icd->use_count--;
445 if (!icd->use_count) {
446 struct soc_camera_link *icl = to_soc_camera_link(icd);
447
448 pm_runtime_suspend(&icd->vdev->dev);
449 pm_runtime_disable(&icd->vdev->dev);
450
451 ici->ops->remove(icd);
452
453 if (icl->power)
454 icl->power(icd->pdev, 0);
455 }
456
457 mutex_unlock(&icd->video_lock);
458
459 module_put(ici->ops->owner);
460
461 vfree(icf);
462
463 dev_dbg(&icd->dev, "camera device close\n");
464
465 return 0;
466 }
467
468 static ssize_t soc_camera_read(struct file *file, char __user *buf,
469 size_t count, loff_t *ppos)
470 {
471 struct soc_camera_file *icf = file->private_data;
472 struct soc_camera_device *icd = icf->icd;
473 int err = -EINVAL;
474
475 dev_err(&icd->dev, "camera device read not implemented\n");
476
477 return err;
478 }
479
480 static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma)
481 {
482 struct soc_camera_file *icf = file->private_data;
483 struct soc_camera_device *icd = icf->icd;
484 int err;
485
486 dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
487
488 err = videobuf_mmap_mapper(&icf->vb_vidq, vma);
489
490 dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n",
491 (unsigned long)vma->vm_start,
492 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start,
493 err);
494
495 return err;
496 }
497
498 static unsigned int soc_camera_poll(struct file *file, poll_table *pt)
499 {
500 struct soc_camera_file *icf = file->private_data;
501 struct soc_camera_device *icd = icf->icd;
502 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
503
504 if (list_empty(&icf->vb_vidq.stream)) {
505 dev_err(&icd->dev, "Trying to poll with no queued buffers!\n");
506 return POLLERR;
507 }
508
509 return ici->ops->poll(file, pt);
510 }
511
512 static struct v4l2_file_operations soc_camera_fops = {
513 .owner = THIS_MODULE,
514 .open = soc_camera_open,
515 .release = soc_camera_close,
516 .ioctl = video_ioctl2,
517 .read = soc_camera_read,
518 .mmap = soc_camera_mmap,
519 .poll = soc_camera_poll,
520 };
521
522 static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
523 struct v4l2_format *f)
524 {
525 struct soc_camera_file *icf = file->private_data;
526 struct soc_camera_device *icd = icf->icd;
527 int ret;
528
529 WARN_ON(priv != file->private_data);
530
531 mutex_lock(&icf->vb_vidq.vb_lock);
532
533 if (icf->vb_vidq.bufs[0]) {
534 dev_err(&icd->dev, "S_FMT denied: queue initialised\n");
535 ret = -EBUSY;
536 goto unlock;
537 }
538
539 ret = soc_camera_set_fmt(icf, f);
540
541 unlock:
542 mutex_unlock(&icf->vb_vidq.vb_lock);
543
544 return ret;
545 }
546
547 static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv,
548 struct v4l2_fmtdesc *f)
549 {
550 struct soc_camera_file *icf = file->private_data;
551 struct soc_camera_device *icd = icf->icd;
552 const struct soc_mbus_pixelfmt *format;
553
554 WARN_ON(priv != file->private_data);
555
556 if (f->index >= icd->num_user_formats)
557 return -EINVAL;
558
559 format = icd->user_formats[f->index].host_fmt;
560
561 if (format->name)
562 strlcpy(f->description, format->name, sizeof(f->description));
563 f->pixelformat = format->fourcc;
564 return 0;
565 }
566
567 static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
568 struct v4l2_format *f)
569 {
570 struct soc_camera_file *icf = file->private_data;
571 struct soc_camera_device *icd = icf->icd;
572 struct v4l2_pix_format *pix = &f->fmt.pix;
573
574 WARN_ON(priv != file->private_data);
575
576 pix->width = icd->user_width;
577 pix->height = icd->user_height;
578 pix->field = icf->vb_vidq.field;
579 pix->pixelformat = icd->current_fmt->host_fmt->fourcc;
580 pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
581 icd->current_fmt->host_fmt);
582 pix->colorspace = icd->colorspace;
583 if (pix->bytesperline < 0)
584 return pix->bytesperline;
585 pix->sizeimage = pix->height * pix->bytesperline;
586 dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n",
587 icd->current_fmt->host_fmt->fourcc);
588 return 0;
589 }
590
591 static int soc_camera_querycap(struct file *file, void *priv,
592 struct v4l2_capability *cap)
593 {
594 struct soc_camera_file *icf = file->private_data;
595 struct soc_camera_device *icd = icf->icd;
596 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
597
598 WARN_ON(priv != file->private_data);
599
600 strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver));
601 return ici->ops->querycap(ici, cap);
602 }
603
604 static int soc_camera_streamon(struct file *file, void *priv,
605 enum v4l2_buf_type i)
606 {
607 struct soc_camera_file *icf = file->private_data;
608 struct soc_camera_device *icd = icf->icd;
609 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
610 int ret;
611
612 WARN_ON(priv != file->private_data);
613
614 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
615 return -EINVAL;
616
617 mutex_lock(&icd->video_lock);
618
619 v4l2_subdev_call(sd, video, s_stream, 1);
620
621 /* This calls buf_queue from host driver's videobuf_queue_ops */
622 ret = videobuf_streamon(&icf->vb_vidq);
623
624 mutex_unlock(&icd->video_lock);
625
626 return ret;
627 }
628
629 static int soc_camera_streamoff(struct file *file, void *priv,
630 enum v4l2_buf_type i)
631 {
632 struct soc_camera_file *icf = file->private_data;
633 struct soc_camera_device *icd = icf->icd;
634 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
635
636 WARN_ON(priv != file->private_data);
637
638 if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
639 return -EINVAL;
640
641 mutex_lock(&icd->video_lock);
642
643 /*
644 * This calls buf_release from host driver's videobuf_queue_ops for all
645 * remaining buffers. When the last buffer is freed, stop capture
646 */
647 videobuf_streamoff(&icf->vb_vidq);
648
649 v4l2_subdev_call(sd, video, s_stream, 0);
650
651 mutex_unlock(&icd->video_lock);
652
653 return 0;
654 }
655
656 static int soc_camera_queryctrl(struct file *file, void *priv,
657 struct v4l2_queryctrl *qc)
658 {
659 struct soc_camera_file *icf = file->private_data;
660 struct soc_camera_device *icd = icf->icd;
661 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
662 int i;
663
664 WARN_ON(priv != file->private_data);
665
666 if (!qc->id)
667 return -EINVAL;
668
669 /* First check host controls */
670 for (i = 0; i < ici->ops->num_controls; i++)
671 if (qc->id == ici->ops->controls[i].id) {
672 memcpy(qc, &(ici->ops->controls[i]),
673 sizeof(*qc));
674 return 0;
675 }
676
677 /* Then device controls */
678 for (i = 0; i < icd->ops->num_controls; i++)
679 if (qc->id == icd->ops->controls[i].id) {
680 memcpy(qc, &(icd->ops->controls[i]),
681 sizeof(*qc));
682 return 0;
683 }
684
685 return -EINVAL;
686 }
687
688 static int soc_camera_g_ctrl(struct file *file, void *priv,
689 struct v4l2_control *ctrl)
690 {
691 struct soc_camera_file *icf = file->private_data;
692 struct soc_camera_device *icd = icf->icd;
693 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
694 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
695 int ret;
696
697 WARN_ON(priv != file->private_data);
698
699 if (ici->ops->get_ctrl) {
700 ret = ici->ops->get_ctrl(icd, ctrl);
701 if (ret != -ENOIOCTLCMD)
702 return ret;
703 }
704
705 return v4l2_subdev_call(sd, core, g_ctrl, ctrl);
706 }
707
708 static int soc_camera_s_ctrl(struct file *file, void *priv,
709 struct v4l2_control *ctrl)
710 {
711 struct soc_camera_file *icf = file->private_data;
712 struct soc_camera_device *icd = icf->icd;
713 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
714 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
715 int ret;
716
717 WARN_ON(priv != file->private_data);
718
719 if (ici->ops->set_ctrl) {
720 ret = ici->ops->set_ctrl(icd, ctrl);
721 if (ret != -ENOIOCTLCMD)
722 return ret;
723 }
724
725 return v4l2_subdev_call(sd, core, s_ctrl, ctrl);
726 }
727
728 static int soc_camera_cropcap(struct file *file, void *fh,
729 struct v4l2_cropcap *a)
730 {
731 struct soc_camera_file *icf = file->private_data;
732 struct soc_camera_device *icd = icf->icd;
733 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
734
735 return ici->ops->cropcap(icd, a);
736 }
737
738 static int soc_camera_g_crop(struct file *file, void *fh,
739 struct v4l2_crop *a)
740 {
741 struct soc_camera_file *icf = file->private_data;
742 struct soc_camera_device *icd = icf->icd;
743 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
744 int ret;
745
746 mutex_lock(&icf->vb_vidq.vb_lock);
747 ret = ici->ops->get_crop(icd, a);
748 mutex_unlock(&icf->vb_vidq.vb_lock);
749
750 return ret;
751 }
752
753 /*
754 * According to the V4L2 API, drivers shall not update the struct v4l2_crop
755 * argument with the actual geometry, instead, the user shall use G_CROP to
756 * retrieve it.
757 */
758 static int soc_camera_s_crop(struct file *file, void *fh,
759 struct v4l2_crop *a)
760 {
761 struct soc_camera_file *icf = file->private_data;
762 struct soc_camera_device *icd = icf->icd;
763 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
764 struct v4l2_rect *rect = &a->c;
765 struct v4l2_crop current_crop;
766 int ret;
767
768 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
769 return -EINVAL;
770
771 dev_dbg(&icd->dev, "S_CROP(%ux%u@%u:%u)\n",
772 rect->width, rect->height, rect->left, rect->top);
773
774 /* Cropping is allowed during a running capture, guard consistency */
775 mutex_lock(&icf->vb_vidq.vb_lock);
776
777 /* If get_crop fails, we'll let host and / or client drivers decide */
778 ret = ici->ops->get_crop(icd, &current_crop);
779
780 /* Prohibit window size change with initialised buffers */
781 if (icf->vb_vidq.bufs[0] && !ret &&
782 (a->c.width != current_crop.c.width ||
783 a->c.height != current_crop.c.height)) {
784 dev_err(&icd->dev,
785 "S_CROP denied: queue initialised and sizes differ\n");
786 ret = -EBUSY;
787 } else {
788 ret = ici->ops->set_crop(icd, a);
789 }
790
791 mutex_unlock(&icf->vb_vidq.vb_lock);
792
793 return ret;
794 }
795
796 static int soc_camera_g_parm(struct file *file, void *fh,
797 struct v4l2_streamparm *a)
798 {
799 struct soc_camera_file *icf = file->private_data;
800 struct soc_camera_device *icd = icf->icd;
801 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
802
803 if (ici->ops->get_parm)
804 return ici->ops->get_parm(icd, a);
805
806 return -ENOIOCTLCMD;
807 }
808
809 static int soc_camera_s_parm(struct file *file, void *fh,
810 struct v4l2_streamparm *a)
811 {
812 struct soc_camera_file *icf = file->private_data;
813 struct soc_camera_device *icd = icf->icd;
814 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
815
816 if (ici->ops->set_parm)
817 return ici->ops->set_parm(icd, a);
818
819 return -ENOIOCTLCMD;
820 }
821
822 static int soc_camera_g_chip_ident(struct file *file, void *fh,
823 struct v4l2_dbg_chip_ident *id)
824 {
825 struct soc_camera_file *icf = file->private_data;
826 struct soc_camera_device *icd = icf->icd;
827 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
828
829 return v4l2_subdev_call(sd, core, g_chip_ident, id);
830 }
831
832 #ifdef CONFIG_VIDEO_ADV_DEBUG
833 static int soc_camera_g_register(struct file *file, void *fh,
834 struct v4l2_dbg_register *reg)
835 {
836 struct soc_camera_file *icf = file->private_data;
837 struct soc_camera_device *icd = icf->icd;
838 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
839
840 return v4l2_subdev_call(sd, core, g_register, reg);
841 }
842
843 static int soc_camera_s_register(struct file *file, void *fh,
844 struct v4l2_dbg_register *reg)
845 {
846 struct soc_camera_file *icf = file->private_data;
847 struct soc_camera_device *icd = icf->icd;
848 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
849
850 return v4l2_subdev_call(sd, core, s_register, reg);
851 }
852 #endif
853
854 /* So far this function cannot fail */
855 static void scan_add_host(struct soc_camera_host *ici)
856 {
857 struct soc_camera_device *icd;
858
859 mutex_lock(&list_lock);
860
861 list_for_each_entry(icd, &devices, list) {
862 if (icd->iface == ici->nr) {
863 int ret;
864 icd->dev.parent = ici->v4l2_dev.dev;
865 dev_set_name(&icd->dev, "%u-%u", icd->iface,
866 icd->devnum);
867 ret = device_register(&icd->dev);
868 if (ret < 0) {
869 icd->dev.parent = NULL;
870 dev_err(&icd->dev,
871 "Cannot register device: %d\n", ret);
872 }
873 }
874 }
875
876 mutex_unlock(&list_lock);
877 }
878
879 #ifdef CONFIG_I2C_BOARDINFO
880 static int soc_camera_init_i2c(struct soc_camera_device *icd,
881 struct soc_camera_link *icl)
882 {
883 struct i2c_client *client;
884 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
885 struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id);
886 struct v4l2_subdev *subdev;
887
888 if (!adap) {
889 dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n",
890 icl->i2c_adapter_id);
891 goto ei2cga;
892 }
893
894 icl->board_info->platform_data = icd;
895
896 subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap,
897 icl->module_name, icl->board_info, NULL);
898 if (!subdev)
899 goto ei2cnd;
900
901 client = subdev->priv;
902
903 /* Use to_i2c_client(dev) to recover the i2c client */
904 dev_set_drvdata(&icd->dev, &client->dev);
905
906 return 0;
907 ei2cnd:
908 i2c_put_adapter(adap);
909 ei2cga:
910 return -ENODEV;
911 }
912
913 static void soc_camera_free_i2c(struct soc_camera_device *icd)
914 {
915 struct i2c_client *client =
916 to_i2c_client(to_soc_camera_control(icd));
917 dev_set_drvdata(&icd->dev, NULL);
918 v4l2_device_unregister_subdev(i2c_get_clientdata(client));
919 i2c_unregister_device(client);
920 i2c_put_adapter(client->adapter);
921 }
922 #else
923 #define soc_camera_init_i2c(icd, icl) (-ENODEV)
924 #define soc_camera_free_i2c(icd) do {} while (0)
925 #endif
926
927 static int soc_camera_video_start(struct soc_camera_device *icd);
928 static int video_dev_create(struct soc_camera_device *icd);
929 /* Called during host-driver probe */
930 static int soc_camera_probe(struct device *dev)
931 {
932 struct soc_camera_device *icd = to_soc_camera_dev(dev);
933 struct soc_camera_host *ici = to_soc_camera_host(dev->parent);
934 struct soc_camera_link *icl = to_soc_camera_link(icd);
935 struct device *control = NULL;
936 struct v4l2_subdev *sd;
937 struct v4l2_mbus_framefmt mf;
938 int ret;
939
940 dev_info(dev, "Probing %s\n", dev_name(dev));
941
942 if (icl->power) {
943 ret = icl->power(icd->pdev, 1);
944 if (ret < 0) {
945 dev_err(dev,
946 "Platform failed to power-on the camera.\n");
947 goto epower;
948 }
949 }
950
951 /* The camera could have been already on, try to reset */
952 if (icl->reset)
953 icl->reset(icd->pdev);
954
955 ret = ici->ops->add(icd);
956 if (ret < 0)
957 goto eadd;
958
959 /* Must have icd->vdev before registering the device */
960 ret = video_dev_create(icd);
961 if (ret < 0)
962 goto evdc;
963
964 /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */
965 if (icl->board_info) {
966 ret = soc_camera_init_i2c(icd, icl);
967 if (ret < 0)
968 goto eadddev;
969 } else if (!icl->add_device || !icl->del_device) {
970 ret = -EINVAL;
971 goto eadddev;
972 } else {
973 if (icl->module_name)
974 ret = request_module(icl->module_name);
975
976 ret = icl->add_device(icl, &icd->dev);
977 if (ret < 0)
978 goto eadddev;
979
980 /*
981 * FIXME: this is racy, have to use driver-binding notification,
982 * when it is available
983 */
984 control = to_soc_camera_control(icd);
985 if (!control || !control->driver || !dev_get_drvdata(control) ||
986 !try_module_get(control->driver->owner)) {
987 icl->del_device(icl);
988 goto enodrv;
989 }
990 }
991
992 /* At this point client .probe() should have run already */
993 ret = soc_camera_init_user_formats(icd);
994 if (ret < 0)
995 goto eiufmt;
996
997 icd->field = V4L2_FIELD_ANY;
998
999 /* ..._video_start() will create a device node, so we have to protect */
1000 mutex_lock(&icd->video_lock);
1001
1002 ret = soc_camera_video_start(icd);
1003 if (ret < 0)
1004 goto evidstart;
1005
1006 /* Try to improve our guess of a reasonable window format */
1007 sd = soc_camera_to_subdev(icd);
1008 if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) {
1009 icd->user_width = mf.width;
1010 icd->user_height = mf.height;
1011 icd->colorspace = mf.colorspace;
1012 icd->field = mf.field;
1013 }
1014
1015 /* Do we have to sysfs_remove_link() before device_unregister()? */
1016 if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj,
1017 "control"))
1018 dev_warn(&icd->dev, "Failed creating the control symlink\n");
1019
1020 ici->ops->remove(icd);
1021
1022 if (icl->power)
1023 icl->power(icd->pdev, 0);
1024
1025 mutex_unlock(&icd->video_lock);
1026
1027 return 0;
1028
1029 evidstart:
1030 mutex_unlock(&icd->video_lock);
1031 soc_camera_free_user_formats(icd);
1032 eiufmt:
1033 if (icl->board_info) {
1034 soc_camera_free_i2c(icd);
1035 } else {
1036 icl->del_device(icl);
1037 module_put(control->driver->owner);
1038 }
1039 enodrv:
1040 eadddev:
1041 video_device_release(icd->vdev);
1042 evdc:
1043 ici->ops->remove(icd);
1044 eadd:
1045 if (icl->power)
1046 icl->power(icd->pdev, 0);
1047 epower:
1048 return ret;
1049 }
1050
1051 /*
1052 * This is called on device_unregister, which only means we have to disconnect
1053 * from the host, but not remove ourselves from the device list
1054 */
1055 static int soc_camera_remove(struct device *dev)
1056 {
1057 struct soc_camera_device *icd = to_soc_camera_dev(dev);
1058 struct soc_camera_link *icl = to_soc_camera_link(icd);
1059 struct video_device *vdev = icd->vdev;
1060
1061 BUG_ON(!dev->parent);
1062
1063 if (vdev) {
1064 mutex_lock(&icd->video_lock);
1065 video_unregister_device(vdev);
1066 icd->vdev = NULL;
1067 mutex_unlock(&icd->video_lock);
1068 }
1069
1070 if (icl->board_info) {
1071 soc_camera_free_i2c(icd);
1072 } else {
1073 struct device_driver *drv = to_soc_camera_control(icd) ?
1074 to_soc_camera_control(icd)->driver : NULL;
1075 if (drv) {
1076 icl->del_device(icl);
1077 module_put(drv->owner);
1078 }
1079 }
1080 soc_camera_free_user_formats(icd);
1081
1082 return 0;
1083 }
1084
1085 static int soc_camera_suspend(struct device *dev, pm_message_t state)
1086 {
1087 struct soc_camera_device *icd = to_soc_camera_dev(dev);
1088 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1089 int ret = 0;
1090
1091 if (ici->ops->suspend)
1092 ret = ici->ops->suspend(icd, state);
1093
1094 return ret;
1095 }
1096
1097 static int soc_camera_resume(struct device *dev)
1098 {
1099 struct soc_camera_device *icd = to_soc_camera_dev(dev);
1100 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1101 int ret = 0;
1102
1103 if (ici->ops->resume)
1104 ret = ici->ops->resume(icd);
1105
1106 return ret;
1107 }
1108
1109 static struct bus_type soc_camera_bus_type = {
1110 .name = "soc-camera",
1111 .probe = soc_camera_probe,
1112 .remove = soc_camera_remove,
1113 .suspend = soc_camera_suspend,
1114 .resume = soc_camera_resume,
1115 };
1116
1117 static struct device_driver ic_drv = {
1118 .name = "camera",
1119 .bus = &soc_camera_bus_type,
1120 .owner = THIS_MODULE,
1121 };
1122
1123 static void dummy_release(struct device *dev)
1124 {
1125 }
1126
1127 static int default_cropcap(struct soc_camera_device *icd,
1128 struct v4l2_cropcap *a)
1129 {
1130 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1131 return v4l2_subdev_call(sd, video, cropcap, a);
1132 }
1133
1134 static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1135 {
1136 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1137 return v4l2_subdev_call(sd, video, g_crop, a);
1138 }
1139
1140 static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a)
1141 {
1142 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1143 return v4l2_subdev_call(sd, video, s_crop, a);
1144 }
1145
1146 static void soc_camera_device_init(struct device *dev, void *pdata)
1147 {
1148 dev->platform_data = pdata;
1149 dev->bus = &soc_camera_bus_type;
1150 dev->release = dummy_release;
1151 }
1152
1153 int soc_camera_host_register(struct soc_camera_host *ici)
1154 {
1155 struct soc_camera_host *ix;
1156 int ret;
1157
1158 if (!ici || !ici->ops ||
1159 !ici->ops->try_fmt ||
1160 !ici->ops->set_fmt ||
1161 !ici->ops->set_bus_param ||
1162 !ici->ops->querycap ||
1163 !ici->ops->init_videobuf ||
1164 !ici->ops->reqbufs ||
1165 !ici->ops->add ||
1166 !ici->ops->remove ||
1167 !ici->ops->poll ||
1168 !ici->v4l2_dev.dev)
1169 return -EINVAL;
1170
1171 if (!ici->ops->set_crop)
1172 ici->ops->set_crop = default_s_crop;
1173 if (!ici->ops->get_crop)
1174 ici->ops->get_crop = default_g_crop;
1175 if (!ici->ops->cropcap)
1176 ici->ops->cropcap = default_cropcap;
1177
1178 mutex_lock(&list_lock);
1179 list_for_each_entry(ix, &hosts, list) {
1180 if (ix->nr == ici->nr) {
1181 ret = -EBUSY;
1182 goto edevreg;
1183 }
1184 }
1185
1186 ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev);
1187 if (ret < 0)
1188 goto edevreg;
1189
1190 list_add_tail(&ici->list, &hosts);
1191 mutex_unlock(&list_lock);
1192
1193 scan_add_host(ici);
1194
1195 return 0;
1196
1197 edevreg:
1198 mutex_unlock(&list_lock);
1199 return ret;
1200 }
1201 EXPORT_SYMBOL(soc_camera_host_register);
1202
1203 /* Unregister all clients! */
1204 void soc_camera_host_unregister(struct soc_camera_host *ici)
1205 {
1206 struct soc_camera_device *icd;
1207
1208 mutex_lock(&list_lock);
1209
1210 list_del(&ici->list);
1211
1212 list_for_each_entry(icd, &devices, list) {
1213 if (icd->iface == ici->nr) {
1214 void *pdata = icd->dev.platform_data;
1215 /* The bus->remove will be called */
1216 device_unregister(&icd->dev);
1217 /*
1218 * Not before device_unregister(), .remove
1219 * needs parent to call ici->ops->remove().
1220 * If the host module is loaded again, device_register()
1221 * would complain "already initialised," since 2.6.32
1222 * this is also needed to prevent use-after-free of the
1223 * device private data.
1224 */
1225 memset(&icd->dev, 0, sizeof(icd->dev));
1226 soc_camera_device_init(&icd->dev, pdata);
1227 }
1228 }
1229
1230 mutex_unlock(&list_lock);
1231
1232 v4l2_device_unregister(&ici->v4l2_dev);
1233 }
1234 EXPORT_SYMBOL(soc_camera_host_unregister);
1235
1236 /* Image capture device */
1237 static int soc_camera_device_register(struct soc_camera_device *icd)
1238 {
1239 struct soc_camera_device *ix;
1240 int num = -1, i;
1241
1242 for (i = 0; i < 256 && num < 0; i++) {
1243 num = i;
1244 /* Check if this index is available on this interface */
1245 list_for_each_entry(ix, &devices, list) {
1246 if (ix->iface == icd->iface && ix->devnum == i) {
1247 num = -1;
1248 break;
1249 }
1250 }
1251 }
1252
1253 if (num < 0)
1254 /*
1255 * ok, we have 256 cameras on this host...
1256 * man, stay reasonable...
1257 */
1258 return -ENOMEM;
1259
1260 icd->devnum = num;
1261 icd->use_count = 0;
1262 icd->host_priv = NULL;
1263 mutex_init(&icd->video_lock);
1264
1265 list_add_tail(&icd->list, &devices);
1266
1267 return 0;
1268 }
1269
1270 static void soc_camera_device_unregister(struct soc_camera_device *icd)
1271 {
1272 list_del(&icd->list);
1273 }
1274
1275 static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = {
1276 .vidioc_querycap = soc_camera_querycap,
1277 .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap,
1278 .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap,
1279 .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap,
1280 .vidioc_enum_input = soc_camera_enum_input,
1281 .vidioc_g_input = soc_camera_g_input,
1282 .vidioc_s_input = soc_camera_s_input,
1283 .vidioc_s_std = soc_camera_s_std,
1284 .vidioc_reqbufs = soc_camera_reqbufs,
1285 .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap,
1286 .vidioc_querybuf = soc_camera_querybuf,
1287 .vidioc_qbuf = soc_camera_qbuf,
1288 .vidioc_dqbuf = soc_camera_dqbuf,
1289 .vidioc_streamon = soc_camera_streamon,
1290 .vidioc_streamoff = soc_camera_streamoff,
1291 .vidioc_queryctrl = soc_camera_queryctrl,
1292 .vidioc_g_ctrl = soc_camera_g_ctrl,
1293 .vidioc_s_ctrl = soc_camera_s_ctrl,
1294 .vidioc_cropcap = soc_camera_cropcap,
1295 .vidioc_g_crop = soc_camera_g_crop,
1296 .vidioc_s_crop = soc_camera_s_crop,
1297 .vidioc_g_parm = soc_camera_g_parm,
1298 .vidioc_s_parm = soc_camera_s_parm,
1299 .vidioc_g_chip_ident = soc_camera_g_chip_ident,
1300 #ifdef CONFIG_VIDEO_ADV_DEBUG
1301 .vidioc_g_register = soc_camera_g_register,
1302 .vidioc_s_register = soc_camera_s_register,
1303 #endif
1304 };
1305
1306 static int video_dev_create(struct soc_camera_device *icd)
1307 {
1308 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1309 struct video_device *vdev = video_device_alloc();
1310
1311 if (!vdev)
1312 return -ENOMEM;
1313
1314 strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name));
1315
1316 vdev->parent = &icd->dev;
1317 vdev->current_norm = V4L2_STD_UNKNOWN;
1318 vdev->fops = &soc_camera_fops;
1319 vdev->ioctl_ops = &soc_camera_ioctl_ops;
1320 vdev->release = video_device_release;
1321 vdev->tvnorms = V4L2_STD_UNKNOWN;
1322
1323 icd->vdev = vdev;
1324
1325 return 0;
1326 }
1327
1328 /*
1329 * Called from soc_camera_probe() above (with .video_lock held???)
1330 */
1331 static int soc_camera_video_start(struct soc_camera_device *icd)
1332 {
1333 struct device_type *type = icd->vdev->dev.type;
1334 int ret;
1335
1336 if (!icd->dev.parent)
1337 return -ENODEV;
1338
1339 if (!icd->ops ||
1340 !icd->ops->query_bus_param ||
1341 !icd->ops->set_bus_param)
1342 return -EINVAL;
1343
1344 ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1);
1345 if (ret < 0) {
1346 dev_err(&icd->dev, "video_register_device failed: %d\n", ret);
1347 return ret;
1348 }
1349
1350 /* Restore device type, possibly set by the subdevice driver */
1351 icd->vdev->dev.type = type;
1352
1353 return 0;
1354 }
1355
1356 static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev)
1357 {
1358 struct soc_camera_link *icl = pdev->dev.platform_data;
1359 struct soc_camera_device *icd;
1360 int ret;
1361
1362 if (!icl)
1363 return -EINVAL;
1364
1365 icd = kzalloc(sizeof(*icd), GFP_KERNEL);
1366 if (!icd)
1367 return -ENOMEM;
1368
1369 icd->iface = icl->bus_id;
1370 icd->pdev = &pdev->dev;
1371 platform_set_drvdata(pdev, icd);
1372
1373 ret = soc_camera_device_register(icd);
1374 if (ret < 0)
1375 goto escdevreg;
1376
1377 soc_camera_device_init(&icd->dev, icl);
1378
1379 icd->user_width = DEFAULT_WIDTH;
1380 icd->user_height = DEFAULT_HEIGHT;
1381
1382 return 0;
1383
1384 escdevreg:
1385 kfree(icd);
1386
1387 return ret;
1388 }
1389
1390 /*
1391 * Only called on rmmod for each platform device, since they are not
1392 * hot-pluggable. Now we know, that all our users - hosts and devices have
1393 * been unloaded already
1394 */
1395 static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev)
1396 {
1397 struct soc_camera_device *icd = platform_get_drvdata(pdev);
1398
1399 if (!icd)
1400 return -EINVAL;
1401
1402 soc_camera_device_unregister(icd);
1403
1404 kfree(icd);
1405
1406 return 0;
1407 }
1408
1409 static struct platform_driver __refdata soc_camera_pdrv = {
1410 .remove = __devexit_p(soc_camera_pdrv_remove),
1411 .driver = {
1412 .name = "soc-camera-pdrv",
1413 .owner = THIS_MODULE,
1414 },
1415 };
1416
1417 static int __init soc_camera_init(void)
1418 {
1419 int ret = bus_register(&soc_camera_bus_type);
1420 if (ret)
1421 return ret;
1422 ret = driver_register(&ic_drv);
1423 if (ret)
1424 goto edrvr;
1425
1426 ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe);
1427 if (ret)
1428 goto epdr;
1429
1430 return 0;
1431
1432 epdr:
1433 driver_unregister(&ic_drv);
1434 edrvr:
1435 bus_unregister(&soc_camera_bus_type);
1436 return ret;
1437 }
1438
1439 static void __exit soc_camera_exit(void)
1440 {
1441 platform_driver_unregister(&soc_camera_pdrv);
1442 driver_unregister(&ic_drv);
1443 bus_unregister(&soc_camera_bus_type);
1444 }
1445
1446 module_init(soc_camera_init);
1447 module_exit(soc_camera_exit);
1448
1449 MODULE_DESCRIPTION("Image capture bus driver");
1450 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1451 MODULE_LICENSE("GPL");
1452 MODULE_ALIAS("platform:soc-camera-pdrv");
x86 "subsystem" repository