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Commit | Line | Data |
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e55222ef GL |
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/module.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/list.h> | |
23 | #include <linux/err.h> | |
24 | #include <linux/mutex.h> | |
25 | #include <linux/vmalloc.h> | |
26 | ||
27 | #include <media/v4l2-common.h> | |
35ea11ff | 28 | #include <media/v4l2-ioctl.h> |
e55222ef | 29 | #include <media/v4l2-dev.h> |
092d3921 | 30 | #include <media/videobuf-core.h> |
e55222ef GL |
31 | #include <media/soc_camera.h> |
32 | ||
df2ed070 GL |
33 | /* Default to VGA resolution */ |
34 | #define DEFAULT_WIDTH 640 | |
35 | #define DEFAULT_HEIGHT 480 | |
36 | ||
e55222ef GL |
37 | static LIST_HEAD(hosts); |
38 | static LIST_HEAD(devices); | |
39 | static DEFINE_MUTEX(list_lock); | |
e55222ef | 40 | |
25c4d74e | 41 | const struct soc_camera_data_format *soc_camera_format_by_fourcc( |
abe4c471 | 42 | struct soc_camera_device *icd, unsigned int fourcc) |
e55222ef GL |
43 | { |
44 | unsigned int i; | |
45 | ||
26f1b942 GL |
46 | for (i = 0; i < icd->num_formats; i++) |
47 | if (icd->formats[i].fourcc == fourcc) | |
48 | return icd->formats + i; | |
e55222ef GL |
49 | return NULL; |
50 | } | |
25c4d74e | 51 | EXPORT_SYMBOL(soc_camera_format_by_fourcc); |
e55222ef | 52 | |
c2786ad2 GL |
53 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
54 | struct soc_camera_device *icd, unsigned int fourcc) | |
55 | { | |
56 | unsigned int i; | |
57 | ||
58 | for (i = 0; i < icd->num_user_formats; i++) | |
59 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
60 | return icd->user_formats + i; | |
61 | return NULL; | |
62 | } | |
63 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
64 | ||
bd73b36f GL |
65 | /** |
66 | * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
67 | * @icl: camera platform parameters | |
68 | * @flags: flags to be inverted according to platform configuration | |
69 | * @return: resulting flags | |
70 | */ | |
71 | unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, | |
72 | unsigned long flags) | |
73 | { | |
74 | unsigned long f; | |
75 | ||
76 | /* If only one of the two polarities is supported, switch to the opposite */ | |
77 | if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { | |
78 | f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); | |
79 | if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) | |
80 | flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; | |
81 | } | |
82 | ||
83 | if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { | |
84 | f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); | |
85 | if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) | |
86 | flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; | |
87 | } | |
88 | ||
89 | if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { | |
90 | f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); | |
91 | if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) | |
92 | flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; | |
93 | } | |
94 | ||
95 | return flags; | |
96 | } | |
97 | EXPORT_SYMBOL(soc_camera_apply_sensor_flags); | |
98 | ||
72937890 | 99 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 100 | struct v4l2_format *f) |
e55222ef GL |
101 | { |
102 | struct soc_camera_file *icf = file->private_data; | |
103 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 104 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
105 | |
106 | WARN_ON(priv != file->private_data); | |
107 | ||
ad5f2e85 | 108 | /* limit format to hardware capabilities */ |
06daa1af | 109 | return ici->ops->try_fmt(icd, f); |
e55222ef GL |
110 | } |
111 | ||
112 | static int soc_camera_enum_input(struct file *file, void *priv, | |
113 | struct v4l2_input *inp) | |
114 | { | |
34d359db KM |
115 | struct soc_camera_file *icf = file->private_data; |
116 | struct soc_camera_device *icd = icf->icd; | |
117 | int ret = 0; | |
118 | ||
e55222ef GL |
119 | if (inp->index != 0) |
120 | return -EINVAL; | |
121 | ||
34d359db KM |
122 | if (icd->ops->enum_input) |
123 | ret = icd->ops->enum_input(icd, inp); | |
124 | else { | |
125 | /* default is camera */ | |
126 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
127 | inp->std = V4L2_STD_UNKNOWN; | |
128 | strcpy(inp->name, "Camera"); | |
129 | } | |
e55222ef | 130 | |
34d359db | 131 | return ret; |
e55222ef GL |
132 | } |
133 | ||
134 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
135 | { | |
136 | *i = 0; | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
142 | { | |
143 | if (i > 0) | |
144 | return -EINVAL; | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | |
150 | { | |
513791ab KM |
151 | struct soc_camera_file *icf = file->private_data; |
152 | struct soc_camera_device *icd = icf->icd; | |
153 | int ret = 0; | |
154 | ||
155 | if (icd->ops->set_std) | |
156 | ret = icd->ops->set_std(icd, a); | |
157 | ||
158 | return ret; | |
e55222ef GL |
159 | } |
160 | ||
161 | static int soc_camera_reqbufs(struct file *file, void *priv, | |
162 | struct v4l2_requestbuffers *p) | |
163 | { | |
164 | int ret; | |
165 | struct soc_camera_file *icf = file->private_data; | |
166 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 167 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
168 | |
169 | WARN_ON(priv != file->private_data); | |
170 | ||
7e28adb2 | 171 | dev_dbg(&icd->dev, "%s: %d\n", __func__, p->memory); |
e55222ef GL |
172 | |
173 | ret = videobuf_reqbufs(&icf->vb_vidq, p); | |
174 | if (ret < 0) | |
175 | return ret; | |
176 | ||
b8d9904c | 177 | return ici->ops->reqbufs(icf, p); |
e55222ef GL |
178 | } |
179 | ||
180 | static int soc_camera_querybuf(struct file *file, void *priv, | |
181 | struct v4l2_buffer *p) | |
182 | { | |
183 | struct soc_camera_file *icf = file->private_data; | |
184 | ||
185 | WARN_ON(priv != file->private_data); | |
186 | ||
187 | return videobuf_querybuf(&icf->vb_vidq, p); | |
188 | } | |
189 | ||
190 | static int soc_camera_qbuf(struct file *file, void *priv, | |
191 | struct v4l2_buffer *p) | |
192 | { | |
193 | struct soc_camera_file *icf = file->private_data; | |
194 | ||
195 | WARN_ON(priv != file->private_data); | |
196 | ||
197 | return videobuf_qbuf(&icf->vb_vidq, p); | |
198 | } | |
199 | ||
200 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
201 | struct v4l2_buffer *p) | |
202 | { | |
203 | struct soc_camera_file *icf = file->private_data; | |
204 | ||
205 | WARN_ON(priv != file->private_data); | |
206 | ||
207 | return videobuf_dqbuf(&icf->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
208 | } | |
209 | ||
c2786ad2 GL |
210 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
211 | { | |
212 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
213 | int i, fmts = 0; | |
214 | ||
215 | if (!ici->ops->get_formats) | |
216 | /* | |
217 | * Fallback mode - the host will have to serve all | |
218 | * sensor-provided formats one-to-one to the user | |
219 | */ | |
220 | fmts = icd->num_formats; | |
221 | else | |
222 | /* | |
223 | * First pass - only count formats this host-sensor | |
224 | * configuration can provide | |
225 | */ | |
226 | for (i = 0; i < icd->num_formats; i++) | |
227 | fmts += ici->ops->get_formats(icd, i, NULL); | |
228 | ||
229 | if (!fmts) | |
230 | return -ENXIO; | |
231 | ||
232 | icd->user_formats = | |
233 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
234 | if (!icd->user_formats) | |
235 | return -ENOMEM; | |
236 | ||
237 | icd->num_user_formats = fmts; | |
238 | fmts = 0; | |
239 | ||
240 | dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts); | |
241 | ||
242 | /* Second pass - actually fill data formats */ | |
243 | for (i = 0; i < icd->num_formats; i++) | |
244 | if (!ici->ops->get_formats) { | |
245 | icd->user_formats[i].host_fmt = icd->formats + i; | |
246 | icd->user_formats[i].cam_fmt = icd->formats + i; | |
247 | icd->user_formats[i].buswidth = icd->formats[i].depth; | |
248 | } else { | |
249 | fmts += ici->ops->get_formats(icd, i, | |
250 | &icd->user_formats[fmts]); | |
251 | } | |
252 | ||
253 | icd->current_fmt = icd->user_formats[0].host_fmt; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) | |
259 | { | |
260 | vfree(icd->user_formats); | |
261 | } | |
262 | ||
df2ed070 GL |
263 | /* Called with .vb_lock held */ |
264 | static int soc_camera_set_fmt(struct soc_camera_file *icf, | |
265 | struct v4l2_format *f) | |
266 | { | |
267 | struct soc_camera_device *icd = icf->icd; | |
268 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
269 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
270 | int ret; | |
271 | ||
272 | /* We always call try_fmt() before set_fmt() or set_crop() */ | |
273 | ret = ici->ops->try_fmt(icd, f); | |
274 | if (ret < 0) | |
275 | return ret; | |
276 | ||
277 | ret = ici->ops->set_fmt(icd, f); | |
278 | if (ret < 0) { | |
279 | return ret; | |
280 | } else if (!icd->current_fmt || | |
281 | icd->current_fmt->fourcc != pix->pixelformat) { | |
282 | dev_err(&ici->dev, | |
283 | "Host driver hasn't set up current format correctly!\n"); | |
284 | return -EINVAL; | |
285 | } | |
286 | ||
287 | icd->width = pix->width; | |
288 | icd->height = pix->height; | |
025c18a1 GL |
289 | icf->vb_vidq.field = |
290 | icd->field = pix->field; | |
291 | ||
df2ed070 GL |
292 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
293 | dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n", | |
294 | f->type); | |
295 | ||
296 | dev_dbg(&icd->dev, "set width: %d height: %d\n", | |
297 | icd->width, icd->height); | |
298 | ||
299 | /* set physical bus parameters */ | |
300 | return ici->ops->set_bus_param(icd, pix->pixelformat); | |
301 | } | |
302 | ||
bec43661 | 303 | static int soc_camera_open(struct file *file) |
e55222ef | 304 | { |
9dc4e48f GL |
305 | struct video_device *vdev; |
306 | struct soc_camera_device *icd; | |
307 | struct soc_camera_host *ici; | |
e55222ef GL |
308 | struct soc_camera_file *icf; |
309 | int ret; | |
310 | ||
311 | icf = vmalloc(sizeof(*icf)); | |
312 | if (!icf) | |
313 | return -ENOMEM; | |
314 | ||
1c3bb743 GL |
315 | /* |
316 | * It is safe to dereference these pointers now as long as a user has | |
317 | * the video device open - we are protected by the held cdev reference. | |
318 | */ | |
9dc4e48f GL |
319 | |
320 | vdev = video_devdata(file); | |
5e85e732 | 321 | icd = container_of(vdev->parent, struct soc_camera_device, dev); |
9dc4e48f | 322 | ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
323 | |
324 | if (!try_module_get(icd->ops->owner)) { | |
325 | dev_err(&icd->dev, "Couldn't lock sensor driver.\n"); | |
326 | ret = -EINVAL; | |
327 | goto emgd; | |
328 | } | |
329 | ||
b8d9904c | 330 | if (!try_module_get(ici->ops->owner)) { |
e55222ef GL |
331 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); |
332 | ret = -EINVAL; | |
333 | goto emgi; | |
334 | } | |
335 | ||
1c3bb743 GL |
336 | /* Protect against icd->remove() until we module_get() both drivers. */ |
337 | mutex_lock(&icd->video_lock); | |
338 | ||
9dc4e48f | 339 | icf->icd = icd; |
1a0063a9 GL |
340 | icd->use_count++; |
341 | ||
9dc4e48f GL |
342 | /* Now we really have to activate the camera */ |
343 | if (icd->use_count == 1) { | |
025c18a1 | 344 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
345 | struct v4l2_format f = { |
346 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
347 | .fmt.pix = { | |
025c18a1 GL |
348 | .width = icd->width, |
349 | .height = icd->height, | |
350 | .field = icd->field, | |
351 | .pixelformat = icd->current_fmt->fourcc, | |
352 | .colorspace = icd->current_fmt->colorspace, | |
df2ed070 GL |
353 | }, |
354 | }; | |
355 | ||
b8d9904c | 356 | ret = ici->ops->add(icd); |
9dc4e48f GL |
357 | if (ret < 0) { |
358 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
9dc4e48f GL |
359 | goto eiciadd; |
360 | } | |
df2ed070 | 361 | |
df2ed070 GL |
362 | /* Try to configure with default parameters */ |
363 | ret = soc_camera_set_fmt(icf, &f); | |
364 | if (ret < 0) | |
365 | goto esfmt; | |
9dc4e48f GL |
366 | } |
367 | ||
1c3bb743 | 368 | mutex_unlock(&icd->video_lock); |
9dc4e48f | 369 | |
e55222ef GL |
370 | file->private_data = icf; |
371 | dev_dbg(&icd->dev, "camera device open\n"); | |
372 | ||
a034d1b7 | 373 | ici->ops->init_videobuf(&icf->vb_vidq, icd); |
e55222ef GL |
374 | |
375 | return 0; | |
376 | ||
df2ed070 GL |
377 | /* |
378 | * First three errors are entered with the .video_lock held | |
379 | * and use_count == 1 | |
380 | */ | |
381 | esfmt: | |
382 | ici->ops->remove(icd); | |
9dc4e48f | 383 | eiciadd: |
c2786ad2 | 384 | icd->use_count--; |
1c3bb743 | 385 | mutex_unlock(&icd->video_lock); |
b8d9904c | 386 | module_put(ici->ops->owner); |
e55222ef GL |
387 | emgi: |
388 | module_put(icd->ops->owner); | |
389 | emgd: | |
390 | vfree(icf); | |
391 | return ret; | |
392 | } | |
393 | ||
bec43661 | 394 | static int soc_camera_close(struct file *file) |
e55222ef GL |
395 | { |
396 | struct soc_camera_file *icf = file->private_data; | |
397 | struct soc_camera_device *icd = icf->icd; | |
398 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
399 | struct video_device *vdev = icd->vdev; | |
400 | ||
1c3bb743 | 401 | mutex_lock(&icd->video_lock); |
9dc4e48f | 402 | icd->use_count--; |
025c18a1 | 403 | if (!icd->use_count) |
b8d9904c | 404 | ici->ops->remove(icd); |
025c18a1 | 405 | |
1c3bb743 GL |
406 | mutex_unlock(&icd->video_lock); |
407 | ||
e55222ef | 408 | module_put(icd->ops->owner); |
b8d9904c | 409 | module_put(ici->ops->owner); |
9dc4e48f | 410 | |
1a0063a9 | 411 | vfree(icf); |
e55222ef | 412 | |
5e85e732 | 413 | dev_dbg(vdev->parent, "camera device close\n"); |
e55222ef GL |
414 | |
415 | return 0; | |
416 | } | |
417 | ||
aba360d8 | 418 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 419 | size_t count, loff_t *ppos) |
e55222ef GL |
420 | { |
421 | struct soc_camera_file *icf = file->private_data; | |
422 | struct soc_camera_device *icd = icf->icd; | |
423 | struct video_device *vdev = icd->vdev; | |
424 | int err = -EINVAL; | |
425 | ||
5e85e732 | 426 | dev_err(vdev->parent, "camera device read not implemented\n"); |
e55222ef GL |
427 | |
428 | return err; | |
429 | } | |
430 | ||
431 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
432 | { | |
433 | struct soc_camera_file *icf = file->private_data; | |
434 | struct soc_camera_device *icd = icf->icd; | |
435 | int err; | |
436 | ||
437 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
438 | ||
439 | err = videobuf_mmap_mapper(&icf->vb_vidq, vma); | |
440 | ||
441 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
442 | (unsigned long)vma->vm_start, | |
443 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
444 | err); | |
445 | ||
446 | return err; | |
447 | } | |
448 | ||
449 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
450 | { | |
451 | struct soc_camera_file *icf = file->private_data; | |
452 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 453 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
454 | |
455 | if (list_empty(&icf->vb_vidq.stream)) { | |
456 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); | |
457 | return POLLERR; | |
458 | } | |
459 | ||
b8d9904c | 460 | return ici->ops->poll(file, pt); |
e55222ef GL |
461 | } |
462 | ||
bec43661 | 463 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
464 | .owner = THIS_MODULE, |
465 | .open = soc_camera_open, | |
466 | .release = soc_camera_close, | |
467 | .ioctl = video_ioctl2, | |
468 | .read = soc_camera_read, | |
469 | .mmap = soc_camera_mmap, | |
470 | .poll = soc_camera_poll, | |
e55222ef GL |
471 | }; |
472 | ||
72937890 | 473 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 474 | struct v4l2_format *f) |
e55222ef GL |
475 | { |
476 | struct soc_camera_file *icf = file->private_data; | |
477 | struct soc_camera_device *icd = icf->icd; | |
e55222ef | 478 | int ret; |
e55222ef GL |
479 | |
480 | WARN_ON(priv != file->private_data); | |
481 | ||
1c3bb743 GL |
482 | mutex_lock(&icf->vb_vidq.vb_lock); |
483 | ||
484 | if (videobuf_queue_is_busy(&icf->vb_vidq)) { | |
485 | dev_err(&icd->dev, "S_FMT denied: queue busy\n"); | |
486 | ret = -EBUSY; | |
487 | goto unlock; | |
488 | } | |
489 | ||
df2ed070 | 490 | ret = soc_camera_set_fmt(icf, f); |
1c3bb743 GL |
491 | |
492 | unlock: | |
493 | mutex_unlock(&icf->vb_vidq.vb_lock); | |
494 | ||
495 | return ret; | |
e55222ef GL |
496 | } |
497 | ||
72937890 | 498 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 499 | struct v4l2_fmtdesc *f) |
e55222ef GL |
500 | { |
501 | struct soc_camera_file *icf = file->private_data; | |
502 | struct soc_camera_device *icd = icf->icd; | |
503 | const struct soc_camera_data_format *format; | |
504 | ||
505 | WARN_ON(priv != file->private_data); | |
506 | ||
c2786ad2 | 507 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
508 | return -EINVAL; |
509 | ||
c2786ad2 | 510 | format = icd->user_formats[f->index].host_fmt; |
e55222ef GL |
511 | |
512 | strlcpy(f->description, format->name, sizeof(f->description)); | |
513 | f->pixelformat = format->fourcc; | |
514 | return 0; | |
515 | } | |
516 | ||
72937890 | 517 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 518 | struct v4l2_format *f) |
e55222ef GL |
519 | { |
520 | struct soc_camera_file *icf = file->private_data; | |
521 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 522 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
523 | |
524 | WARN_ON(priv != file->private_data); | |
525 | ||
64f5905e GL |
526 | pix->width = icd->width; |
527 | pix->height = icd->height; | |
528 | pix->field = icf->vb_vidq.field; | |
529 | pix->pixelformat = icd->current_fmt->fourcc; | |
530 | pix->bytesperline = pix->width * | |
25c4d74e | 531 | DIV_ROUND_UP(icd->current_fmt->depth, 8); |
64f5905e | 532 | pix->sizeimage = pix->height * pix->bytesperline; |
e55222ef GL |
533 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", |
534 | icd->current_fmt->fourcc); | |
535 | return 0; | |
536 | } | |
537 | ||
538 | static int soc_camera_querycap(struct file *file, void *priv, | |
539 | struct v4l2_capability *cap) | |
540 | { | |
541 | struct soc_camera_file *icf = file->private_data; | |
542 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 543 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
544 | |
545 | WARN_ON(priv != file->private_data); | |
546 | ||
547 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 548 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
549 | } |
550 | ||
551 | static int soc_camera_streamon(struct file *file, void *priv, | |
552 | enum v4l2_buf_type i) | |
553 | { | |
554 | struct soc_camera_file *icf = file->private_data; | |
555 | struct soc_camera_device *icd = icf->icd; | |
1c3bb743 | 556 | int ret; |
e55222ef GL |
557 | |
558 | WARN_ON(priv != file->private_data); | |
559 | ||
7e28adb2 | 560 | dev_dbg(&icd->dev, "%s\n", __func__); |
e55222ef GL |
561 | |
562 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
563 | return -EINVAL; | |
564 | ||
1c3bb743 GL |
565 | mutex_lock(&icd->video_lock); |
566 | ||
e55222ef GL |
567 | icd->ops->start_capture(icd); |
568 | ||
569 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | |
1c3bb743 GL |
570 | ret = videobuf_streamon(&icf->vb_vidq); |
571 | ||
572 | mutex_unlock(&icd->video_lock); | |
573 | ||
574 | return ret; | |
e55222ef GL |
575 | } |
576 | ||
577 | static int soc_camera_streamoff(struct file *file, void *priv, | |
578 | enum v4l2_buf_type i) | |
579 | { | |
580 | struct soc_camera_file *icf = file->private_data; | |
581 | struct soc_camera_device *icd = icf->icd; | |
582 | ||
583 | WARN_ON(priv != file->private_data); | |
584 | ||
7e28adb2 | 585 | dev_dbg(&icd->dev, "%s\n", __func__); |
e55222ef GL |
586 | |
587 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
588 | return -EINVAL; | |
589 | ||
1c3bb743 GL |
590 | mutex_lock(&icd->video_lock); |
591 | ||
e55222ef GL |
592 | /* This calls buf_release from host driver's videobuf_queue_ops for all |
593 | * remaining buffers. When the last buffer is freed, stop capture */ | |
594 | videobuf_streamoff(&icf->vb_vidq); | |
595 | ||
596 | icd->ops->stop_capture(icd); | |
597 | ||
1c3bb743 GL |
598 | mutex_unlock(&icd->video_lock); |
599 | ||
e55222ef GL |
600 | return 0; |
601 | } | |
602 | ||
603 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
604 | struct v4l2_queryctrl *qc) | |
605 | { | |
606 | struct soc_camera_file *icf = file->private_data; | |
607 | struct soc_camera_device *icd = icf->icd; | |
608 | int i; | |
609 | ||
610 | WARN_ON(priv != file->private_data); | |
611 | ||
612 | if (!qc->id) | |
613 | return -EINVAL; | |
614 | ||
615 | for (i = 0; i < icd->ops->num_controls; i++) | |
616 | if (qc->id == icd->ops->controls[i].id) { | |
617 | memcpy(qc, &(icd->ops->controls[i]), | |
618 | sizeof(*qc)); | |
619 | return 0; | |
620 | } | |
621 | ||
622 | return -EINVAL; | |
623 | } | |
624 | ||
625 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
626 | struct v4l2_control *ctrl) | |
627 | { | |
628 | struct soc_camera_file *icf = file->private_data; | |
629 | struct soc_camera_device *icd = icf->icd; | |
630 | ||
631 | WARN_ON(priv != file->private_data); | |
632 | ||
633 | switch (ctrl->id) { | |
634 | case V4L2_CID_GAIN: | |
635 | if (icd->gain == (unsigned short)~0) | |
636 | return -EINVAL; | |
637 | ctrl->value = icd->gain; | |
638 | return 0; | |
639 | case V4L2_CID_EXPOSURE: | |
640 | if (icd->exposure == (unsigned short)~0) | |
641 | return -EINVAL; | |
642 | ctrl->value = icd->exposure; | |
643 | return 0; | |
644 | } | |
645 | ||
646 | if (icd->ops->get_control) | |
647 | return icd->ops->get_control(icd, ctrl); | |
648 | return -EINVAL; | |
649 | } | |
650 | ||
651 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
652 | struct v4l2_control *ctrl) | |
653 | { | |
654 | struct soc_camera_file *icf = file->private_data; | |
655 | struct soc_camera_device *icd = icf->icd; | |
656 | ||
657 | WARN_ON(priv != file->private_data); | |
658 | ||
659 | if (icd->ops->set_control) | |
660 | return icd->ops->set_control(icd, ctrl); | |
661 | return -EINVAL; | |
662 | } | |
663 | ||
664 | static int soc_camera_cropcap(struct file *file, void *fh, | |
665 | struct v4l2_cropcap *a) | |
666 | { | |
667 | struct soc_camera_file *icf = file->private_data; | |
668 | struct soc_camera_device *icd = icf->icd; | |
669 | ||
670 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
671 | a->bounds.left = icd->x_min; | |
672 | a->bounds.top = icd->y_min; | |
673 | a->bounds.width = icd->width_max; | |
674 | a->bounds.height = icd->height_max; | |
675 | a->defrect.left = icd->x_min; | |
676 | a->defrect.top = icd->y_min; | |
df2ed070 GL |
677 | a->defrect.width = DEFAULT_WIDTH; |
678 | a->defrect.height = DEFAULT_HEIGHT; | |
e55222ef GL |
679 | a->pixelaspect.numerator = 1; |
680 | a->pixelaspect.denominator = 1; | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | static int soc_camera_g_crop(struct file *file, void *fh, | |
686 | struct v4l2_crop *a) | |
687 | { | |
688 | struct soc_camera_file *icf = file->private_data; | |
689 | struct soc_camera_device *icd = icf->icd; | |
690 | ||
691 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
692 | a->c.left = icd->x_current; | |
693 | a->c.top = icd->y_current; | |
694 | a->c.width = icd->width; | |
695 | a->c.height = icd->height; | |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static int soc_camera_s_crop(struct file *file, void *fh, | |
701 | struct v4l2_crop *a) | |
702 | { | |
703 | struct soc_camera_file *icf = file->private_data; | |
704 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 705 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
706 | int ret; |
707 | ||
708 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
709 | return -EINVAL; | |
710 | ||
1c3bb743 GL |
711 | /* Cropping is allowed during a running capture, guard consistency */ |
712 | mutex_lock(&icf->vb_vidq.vb_lock); | |
713 | ||
09e231b3 | 714 | ret = ici->ops->set_crop(icd, &a->c); |
e55222ef GL |
715 | if (!ret) { |
716 | icd->width = a->c.width; | |
717 | icd->height = a->c.height; | |
718 | icd->x_current = a->c.left; | |
719 | icd->y_current = a->c.top; | |
720 | } | |
721 | ||
1c3bb743 GL |
722 | mutex_unlock(&icf->vb_vidq.vb_lock); |
723 | ||
e55222ef GL |
724 | return ret; |
725 | } | |
726 | ||
727 | static int soc_camera_g_chip_ident(struct file *file, void *fh, | |
aecde8b5 | 728 | struct v4l2_dbg_chip_ident *id) |
e55222ef GL |
729 | { |
730 | struct soc_camera_file *icf = file->private_data; | |
731 | struct soc_camera_device *icd = icf->icd; | |
732 | ||
733 | if (!icd->ops->get_chip_id) | |
734 | return -EINVAL; | |
735 | ||
736 | return icd->ops->get_chip_id(icd, id); | |
737 | } | |
738 | ||
739 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
740 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 741 | struct v4l2_dbg_register *reg) |
e55222ef GL |
742 | { |
743 | struct soc_camera_file *icf = file->private_data; | |
744 | struct soc_camera_device *icd = icf->icd; | |
745 | ||
746 | if (!icd->ops->get_register) | |
747 | return -EINVAL; | |
748 | ||
749 | return icd->ops->get_register(icd, reg); | |
750 | } | |
751 | ||
752 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 753 | struct v4l2_dbg_register *reg) |
e55222ef GL |
754 | { |
755 | struct soc_camera_file *icf = file->private_data; | |
756 | struct soc_camera_device *icd = icf->icd; | |
757 | ||
758 | if (!icd->ops->set_register) | |
759 | return -EINVAL; | |
760 | ||
761 | return icd->ops->set_register(icd, reg); | |
762 | } | |
763 | #endif | |
764 | ||
765 | static int device_register_link(struct soc_camera_device *icd) | |
766 | { | |
eee1663f GL |
767 | int ret = dev_set_name(&icd->dev, "%u-%u", icd->iface, icd->devnum); |
768 | ||
769 | if (!ret) | |
770 | ret = device_register(&icd->dev); | |
e55222ef GL |
771 | |
772 | if (ret < 0) { | |
773 | /* Prevent calling device_unregister() */ | |
774 | icd->dev.parent = NULL; | |
775 | dev_err(&icd->dev, "Cannot register device: %d\n", ret); | |
776 | /* Even if probe() was unsuccessful for all registered drivers, | |
777 | * device_register() returns 0, and we add the link, just to | |
778 | * document this camera's control device */ | |
779 | } else if (icd->control) | |
780 | /* Have to sysfs_remove_link() before device_unregister()? */ | |
781 | if (sysfs_create_link(&icd->dev.kobj, &icd->control->kobj, | |
782 | "control")) | |
783 | dev_warn(&icd->dev, | |
784 | "Failed creating the control symlink\n"); | |
785 | return ret; | |
786 | } | |
787 | ||
788 | /* So far this function cannot fail */ | |
789 | static void scan_add_host(struct soc_camera_host *ici) | |
790 | { | |
791 | struct soc_camera_device *icd; | |
792 | ||
793 | mutex_lock(&list_lock); | |
794 | ||
795 | list_for_each_entry(icd, &devices, list) { | |
796 | if (icd->iface == ici->nr) { | |
797 | icd->dev.parent = &ici->dev; | |
798 | device_register_link(icd); | |
799 | } | |
800 | } | |
801 | ||
802 | mutex_unlock(&list_lock); | |
803 | } | |
804 | ||
805 | /* return: 0 if no match found or a match found and | |
806 | * device_register() successful, error code otherwise */ | |
807 | static int scan_add_device(struct soc_camera_device *icd) | |
808 | { | |
809 | struct soc_camera_host *ici; | |
810 | int ret = 0; | |
811 | ||
812 | mutex_lock(&list_lock); | |
813 | ||
814 | list_add_tail(&icd->list, &devices); | |
815 | ||
816 | /* Watch out for class_for_each_device / class_find_device API by | |
817 | * Dave Young <hidave.darkstar@gmail.com> */ | |
818 | list_for_each_entry(ici, &hosts, list) { | |
819 | if (icd->iface == ici->nr) { | |
820 | ret = 1; | |
821 | icd->dev.parent = &ici->dev; | |
822 | break; | |
823 | } | |
824 | } | |
825 | ||
826 | mutex_unlock(&list_lock); | |
827 | ||
828 | if (ret) | |
829 | ret = device_register_link(icd); | |
830 | ||
831 | return ret; | |
832 | } | |
833 | ||
834 | static int soc_camera_probe(struct device *dev) | |
835 | { | |
836 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
64f5905e | 837 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
838 | int ret; |
839 | ||
1c3bb743 GL |
840 | /* |
841 | * Possible race scenario: | |
842 | * modprobe <camera-host-driver> triggers __func__ | |
843 | * at this moment respective <camera-sensor-driver> gets rmmod'ed | |
844 | * to protect take module references. | |
845 | */ | |
846 | ||
847 | if (!try_module_get(icd->ops->owner)) { | |
848 | dev_err(&icd->dev, "Couldn't lock sensor driver.\n"); | |
849 | ret = -EINVAL; | |
850 | goto emgd; | |
851 | } | |
852 | ||
853 | if (!try_module_get(ici->ops->owner)) { | |
854 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); | |
855 | ret = -EINVAL; | |
856 | goto emgi; | |
857 | } | |
858 | ||
859 | mutex_lock(&icd->video_lock); | |
860 | ||
9dc4e48f GL |
861 | /* We only call ->add() here to activate and probe the camera. |
862 | * We shall ->remove() and deactivate it immediately afterwards. */ | |
b8d9904c | 863 | ret = ici->ops->add(icd); |
e55222ef | 864 | if (ret < 0) |
1c3bb743 | 865 | goto eiadd; |
e55222ef | 866 | |
26f1b942 | 867 | ret = icd->ops->probe(icd); |
9dc4e48f | 868 | if (ret >= 0) { |
e55222ef GL |
869 | const struct v4l2_queryctrl *qctrl; |
870 | ||
871 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_GAIN); | |
872 | icd->gain = qctrl ? qctrl->default_value : (unsigned short)~0; | |
873 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
874 | icd->exposure = qctrl ? qctrl->default_value : | |
875 | (unsigned short)~0; | |
025c18a1 GL |
876 | |
877 | ret = soc_camera_init_user_formats(icd); | |
878 | if (ret < 0) | |
879 | goto eiufmt; | |
880 | ||
881 | icd->height = DEFAULT_HEIGHT; | |
882 | icd->width = DEFAULT_WIDTH; | |
883 | icd->field = V4L2_FIELD_ANY; | |
e55222ef GL |
884 | } |
885 | ||
025c18a1 GL |
886 | eiufmt: |
887 | ici->ops->remove(icd); | |
1c3bb743 GL |
888 | eiadd: |
889 | mutex_unlock(&icd->video_lock); | |
890 | module_put(ici->ops->owner); | |
891 | emgi: | |
892 | module_put(icd->ops->owner); | |
893 | emgd: | |
e55222ef GL |
894 | return ret; |
895 | } | |
896 | ||
897 | /* This is called on device_unregister, which only means we have to disconnect | |
898 | * from the host, but not remove ourselves from the device list */ | |
899 | static int soc_camera_remove(struct device *dev) | |
900 | { | |
901 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
e55222ef | 902 | |
26f1b942 GL |
903 | if (icd->ops->remove) |
904 | icd->ops->remove(icd); | |
e55222ef | 905 | |
025c18a1 GL |
906 | soc_camera_free_user_formats(icd); |
907 | ||
e55222ef GL |
908 | return 0; |
909 | } | |
910 | ||
2e521061 RJ |
911 | static int soc_camera_suspend(struct device *dev, pm_message_t state) |
912 | { | |
913 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
914 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
915 | int ret = 0; | |
916 | ||
917 | if (ici->ops->suspend) | |
918 | ret = ici->ops->suspend(icd, state); | |
919 | ||
920 | return ret; | |
921 | } | |
922 | ||
923 | static int soc_camera_resume(struct device *dev) | |
924 | { | |
925 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
926 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
927 | int ret = 0; | |
928 | ||
929 | if (ici->ops->resume) | |
930 | ret = ici->ops->resume(icd); | |
931 | ||
932 | return ret; | |
933 | } | |
934 | ||
e55222ef GL |
935 | static struct bus_type soc_camera_bus_type = { |
936 | .name = "soc-camera", | |
937 | .probe = soc_camera_probe, | |
938 | .remove = soc_camera_remove, | |
2e521061 RJ |
939 | .suspend = soc_camera_suspend, |
940 | .resume = soc_camera_resume, | |
e55222ef GL |
941 | }; |
942 | ||
943 | static struct device_driver ic_drv = { | |
944 | .name = "camera", | |
945 | .bus = &soc_camera_bus_type, | |
946 | .owner = THIS_MODULE, | |
947 | }; | |
948 | ||
e55222ef GL |
949 | static void dummy_release(struct device *dev) |
950 | { | |
951 | } | |
952 | ||
b8d9904c | 953 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef GL |
954 | { |
955 | int ret; | |
956 | struct soc_camera_host *ix; | |
957 | ||
64f5905e GL |
958 | if (!ici || !ici->ops || |
959 | !ici->ops->try_fmt || | |
960 | !ici->ops->set_fmt || | |
09e231b3 | 961 | !ici->ops->set_crop || |
64f5905e GL |
962 | !ici->ops->set_bus_param || |
963 | !ici->ops->querycap || | |
964 | !ici->ops->init_videobuf || | |
965 | !ici->ops->reqbufs || | |
966 | !ici->ops->add || | |
967 | !ici->ops->remove || | |
968 | !ici->ops->poll) | |
e55222ef GL |
969 | return -EINVAL; |
970 | ||
971 | /* Number might be equal to the platform device ID */ | |
af128a10 | 972 | dev_set_name(&ici->dev, "camera_host%d", ici->nr); |
e55222ef GL |
973 | |
974 | mutex_lock(&list_lock); | |
975 | list_for_each_entry(ix, &hosts, list) { | |
976 | if (ix->nr == ici->nr) { | |
977 | mutex_unlock(&list_lock); | |
978 | return -EBUSY; | |
979 | } | |
980 | } | |
981 | ||
982 | list_add_tail(&ici->list, &hosts); | |
983 | mutex_unlock(&list_lock); | |
984 | ||
e55222ef GL |
985 | ici->dev.release = dummy_release; |
986 | ||
987 | ret = device_register(&ici->dev); | |
988 | ||
989 | if (ret) | |
990 | goto edevr; | |
991 | ||
992 | scan_add_host(ici); | |
993 | ||
994 | return 0; | |
995 | ||
996 | edevr: | |
997 | mutex_lock(&list_lock); | |
998 | list_del(&ici->list); | |
999 | mutex_unlock(&list_lock); | |
1000 | ||
1001 | return ret; | |
1002 | } | |
1003 | EXPORT_SYMBOL(soc_camera_host_register); | |
1004 | ||
1005 | /* Unregister all clients! */ | |
1006 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1007 | { | |
1008 | struct soc_camera_device *icd; | |
1009 | ||
1010 | mutex_lock(&list_lock); | |
1011 | ||
1012 | list_del(&ici->list); | |
1013 | ||
1014 | list_for_each_entry(icd, &devices, list) { | |
1015 | if (icd->dev.parent == &ici->dev) { | |
1016 | device_unregister(&icd->dev); | |
1017 | /* Not before device_unregister(), .remove | |
b8d9904c | 1018 | * needs parent to call ici->ops->remove() */ |
e55222ef GL |
1019 | icd->dev.parent = NULL; |
1020 | memset(&icd->dev.kobj, 0, sizeof(icd->dev.kobj)); | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | mutex_unlock(&list_lock); | |
1025 | ||
1026 | device_unregister(&ici->dev); | |
1027 | } | |
1028 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1029 | ||
1030 | /* Image capture device */ | |
1031 | int soc_camera_device_register(struct soc_camera_device *icd) | |
1032 | { | |
1033 | struct soc_camera_device *ix; | |
1034 | int num = -1, i; | |
1035 | ||
64f5905e GL |
1036 | if (!icd || !icd->ops || |
1037 | !icd->ops->probe || | |
1038 | !icd->ops->init || | |
1039 | !icd->ops->release || | |
1040 | !icd->ops->start_capture || | |
1041 | !icd->ops->stop_capture || | |
09e231b3 | 1042 | !icd->ops->set_crop || |
64f5905e GL |
1043 | !icd->ops->set_fmt || |
1044 | !icd->ops->try_fmt || | |
1045 | !icd->ops->query_bus_param || | |
1046 | !icd->ops->set_bus_param) | |
e55222ef GL |
1047 | return -EINVAL; |
1048 | ||
1049 | for (i = 0; i < 256 && num < 0; i++) { | |
1050 | num = i; | |
1051 | list_for_each_entry(ix, &devices, list) { | |
1052 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1053 | num = -1; | |
1054 | break; | |
1055 | } | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | if (num < 0) | |
1060 | /* ok, we have 256 cameras on this host... | |
1061 | * man, stay reasonable... */ | |
1062 | return -ENOMEM; | |
1063 | ||
1064 | icd->devnum = num; | |
1065 | icd->dev.bus = &soc_camera_bus_type; | |
e55222ef | 1066 | |
64f5905e GL |
1067 | icd->dev.release = dummy_release; |
1068 | icd->use_count = 0; | |
1069 | icd->host_priv = NULL; | |
1c3bb743 | 1070 | mutex_init(&icd->video_lock); |
e55222ef | 1071 | |
e55222ef GL |
1072 | return scan_add_device(icd); |
1073 | } | |
1074 | EXPORT_SYMBOL(soc_camera_device_register); | |
1075 | ||
1076 | void soc_camera_device_unregister(struct soc_camera_device *icd) | |
1077 | { | |
1078 | mutex_lock(&list_lock); | |
1079 | list_del(&icd->list); | |
1080 | ||
1081 | /* The bus->remove will be eventually called */ | |
1082 | if (icd->dev.parent) | |
1083 | device_unregister(&icd->dev); | |
1084 | mutex_unlock(&list_lock); | |
1085 | } | |
1086 | EXPORT_SYMBOL(soc_camera_device_unregister); | |
1087 | ||
a399810c HV |
1088 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1089 | .vidioc_querycap = soc_camera_querycap, | |
1090 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | |
1091 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | |
1092 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | |
1093 | .vidioc_enum_input = soc_camera_enum_input, | |
1094 | .vidioc_g_input = soc_camera_g_input, | |
1095 | .vidioc_s_input = soc_camera_s_input, | |
1096 | .vidioc_s_std = soc_camera_s_std, | |
1097 | .vidioc_reqbufs = soc_camera_reqbufs, | |
1098 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | |
1099 | .vidioc_querybuf = soc_camera_querybuf, | |
1100 | .vidioc_qbuf = soc_camera_qbuf, | |
1101 | .vidioc_dqbuf = soc_camera_dqbuf, | |
1102 | .vidioc_streamon = soc_camera_streamon, | |
1103 | .vidioc_streamoff = soc_camera_streamoff, | |
1104 | .vidioc_queryctrl = soc_camera_queryctrl, | |
1105 | .vidioc_g_ctrl = soc_camera_g_ctrl, | |
1106 | .vidioc_s_ctrl = soc_camera_s_ctrl, | |
1107 | .vidioc_cropcap = soc_camera_cropcap, | |
1108 | .vidioc_g_crop = soc_camera_g_crop, | |
1109 | .vidioc_s_crop = soc_camera_s_crop, | |
1110 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, | |
1111 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1112 | .vidioc_g_register = soc_camera_g_register, | |
1113 | .vidioc_s_register = soc_camera_s_register, | |
1114 | #endif | |
1115 | }; | |
1116 | ||
1c3bb743 GL |
1117 | /* |
1118 | * Usually called from the struct soc_camera_ops .probe() method, i.e., from | |
1119 | * soc_camera_probe() above with .video_lock held | |
1120 | */ | |
e55222ef GL |
1121 | int soc_camera_video_start(struct soc_camera_device *icd) |
1122 | { | |
1123 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1124 | int err = -ENOMEM; | |
1125 | struct video_device *vdev; | |
1126 | ||
1127 | if (!icd->dev.parent) | |
1128 | return -ENODEV; | |
1129 | ||
1130 | vdev = video_device_alloc(); | |
1131 | if (!vdev) | |
1132 | goto evidallocd; | |
1133 | dev_dbg(&ici->dev, "Allocated video_device %p\n", vdev); | |
1134 | ||
1135 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1136 | |
5e85e732 | 1137 | vdev->parent = &icd->dev; |
e55222ef GL |
1138 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1139 | vdev->fops = &soc_camera_fops; | |
a399810c | 1140 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef GL |
1141 | vdev->release = video_device_release; |
1142 | vdev->minor = -1; | |
1143 | vdev->tvnorms = V4L2_STD_UNKNOWN, | |
e55222ef | 1144 | |
e55222ef GL |
1145 | err = video_register_device(vdev, VFL_TYPE_GRABBER, vdev->minor); |
1146 | if (err < 0) { | |
5e85e732 | 1147 | dev_err(vdev->parent, "video_register_device failed\n"); |
e55222ef GL |
1148 | goto evidregd; |
1149 | } | |
1150 | icd->vdev = vdev; | |
1151 | ||
1152 | return 0; | |
1153 | ||
1154 | evidregd: | |
1155 | video_device_release(vdev); | |
1156 | evidallocd: | |
1157 | return err; | |
1158 | } | |
1159 | EXPORT_SYMBOL(soc_camera_video_start); | |
1160 | ||
1161 | void soc_camera_video_stop(struct soc_camera_device *icd) | |
1162 | { | |
1163 | struct video_device *vdev = icd->vdev; | |
1164 | ||
7e28adb2 | 1165 | dev_dbg(&icd->dev, "%s\n", __func__); |
e55222ef GL |
1166 | |
1167 | if (!icd->dev.parent || !vdev) | |
1168 | return; | |
1169 | ||
1c3bb743 | 1170 | mutex_lock(&icd->video_lock); |
e55222ef GL |
1171 | video_unregister_device(vdev); |
1172 | icd->vdev = NULL; | |
1c3bb743 | 1173 | mutex_unlock(&icd->video_lock); |
e55222ef GL |
1174 | } |
1175 | EXPORT_SYMBOL(soc_camera_video_stop); | |
1176 | ||
1177 | static int __init soc_camera_init(void) | |
1178 | { | |
1179 | int ret = bus_register(&soc_camera_bus_type); | |
1180 | if (ret) | |
1181 | return ret; | |
1182 | ret = driver_register(&ic_drv); | |
1183 | if (ret) | |
1184 | goto edrvr; | |
e55222ef GL |
1185 | |
1186 | return 0; | |
1187 | ||
e55222ef GL |
1188 | edrvr: |
1189 | bus_unregister(&soc_camera_bus_type); | |
1190 | return ret; | |
1191 | } | |
1192 | ||
1193 | static void __exit soc_camera_exit(void) | |
1194 | { | |
e55222ef GL |
1195 | driver_unregister(&ic_drv); |
1196 | bus_unregister(&soc_camera_bus_type); | |
1197 | } | |
1198 | ||
1199 | module_init(soc_camera_init); | |
1200 | module_exit(soc_camera_exit); | |
1201 | ||
1202 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1203 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1204 | MODULE_LICENSE("GPL"); |