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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 | ||
e55222ef | 19 | #include <linux/device.h> |
e55222ef | 20 | #include <linux/err.h> |
0fd327bd GL |
21 | #include <linux/i2c.h> |
22 | #include <linux/init.h> | |
23 | #include <linux/list.h> | |
e55222ef | 24 | #include <linux/mutex.h> |
40e2e092 | 25 | #include <linux/module.h> |
0fd327bd | 26 | #include <linux/platform_device.h> |
e55222ef GL |
27 | #include <linux/vmalloc.h> |
28 | ||
0fd327bd | 29 | #include <media/soc_camera.h> |
e55222ef | 30 | #include <media/v4l2-common.h> |
0fd327bd | 31 | #include <media/v4l2-ioctl.h> |
40e2e092 | 32 | #include <media/v4l2-dev.h> |
092d3921 | 33 | #include <media/videobuf-core.h> |
e55222ef | 34 | |
df2ed070 GL |
35 | /* Default to VGA resolution */ |
36 | #define DEFAULT_WIDTH 640 | |
37 | #define DEFAULT_HEIGHT 480 | |
38 | ||
e55222ef GL |
39 | static LIST_HEAD(hosts); |
40 | static LIST_HEAD(devices); | |
40e2e092 | 41 | static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ |
e55222ef | 42 | |
25c4d74e | 43 | const struct soc_camera_data_format *soc_camera_format_by_fourcc( |
abe4c471 | 44 | struct soc_camera_device *icd, unsigned int fourcc) |
e55222ef GL |
45 | { |
46 | unsigned int i; | |
47 | ||
26f1b942 GL |
48 | for (i = 0; i < icd->num_formats; i++) |
49 | if (icd->formats[i].fourcc == fourcc) | |
50 | return icd->formats + i; | |
e55222ef GL |
51 | return NULL; |
52 | } | |
25c4d74e | 53 | EXPORT_SYMBOL(soc_camera_format_by_fourcc); |
e55222ef | 54 | |
c2786ad2 GL |
55 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
56 | struct soc_camera_device *icd, unsigned int fourcc) | |
57 | { | |
58 | unsigned int i; | |
59 | ||
60 | for (i = 0; i < icd->num_user_formats; i++) | |
61 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
62 | return icd->user_formats + i; | |
63 | return NULL; | |
64 | } | |
65 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
66 | ||
bd73b36f GL |
67 | /** |
68 | * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
69 | * @icl: camera platform parameters | |
70 | * @flags: flags to be inverted according to platform configuration | |
71 | * @return: resulting flags | |
72 | */ | |
73 | unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, | |
74 | unsigned long flags) | |
75 | { | |
76 | unsigned long f; | |
77 | ||
78 | /* If only one of the two polarities is supported, switch to the opposite */ | |
79 | if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { | |
80 | f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); | |
81 | if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) | |
82 | flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; | |
83 | } | |
84 | ||
85 | if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { | |
86 | f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); | |
87 | if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) | |
88 | flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; | |
89 | } | |
90 | ||
91 | if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { | |
92 | f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); | |
93 | if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) | |
94 | flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; | |
95 | } | |
96 | ||
97 | return flags; | |
98 | } | |
99 | EXPORT_SYMBOL(soc_camera_apply_sensor_flags); | |
100 | ||
72937890 | 101 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 102 | struct v4l2_format *f) |
e55222ef GL |
103 | { |
104 | struct soc_camera_file *icf = file->private_data; | |
105 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 106 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
107 | |
108 | WARN_ON(priv != file->private_data); | |
109 | ||
ad5f2e85 | 110 | /* limit format to hardware capabilities */ |
06daa1af | 111 | return ici->ops->try_fmt(icd, f); |
e55222ef GL |
112 | } |
113 | ||
114 | static int soc_camera_enum_input(struct file *file, void *priv, | |
115 | struct v4l2_input *inp) | |
116 | { | |
34d359db KM |
117 | struct soc_camera_file *icf = file->private_data; |
118 | struct soc_camera_device *icd = icf->icd; | |
119 | int ret = 0; | |
120 | ||
e55222ef GL |
121 | if (inp->index != 0) |
122 | return -EINVAL; | |
123 | ||
34d359db KM |
124 | if (icd->ops->enum_input) |
125 | ret = icd->ops->enum_input(icd, inp); | |
126 | else { | |
127 | /* default is camera */ | |
128 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
129 | inp->std = V4L2_STD_UNKNOWN; | |
130 | strcpy(inp->name, "Camera"); | |
131 | } | |
e55222ef | 132 | |
34d359db | 133 | return ret; |
e55222ef GL |
134 | } |
135 | ||
136 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
137 | { | |
138 | *i = 0; | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
144 | { | |
145 | if (i > 0) | |
146 | return -EINVAL; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | |
152 | { | |
513791ab KM |
153 | struct soc_camera_file *icf = file->private_data; |
154 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 155 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 156 | |
c9c1f1c0 | 157 | return v4l2_subdev_call(sd, core, s_std, *a); |
e55222ef GL |
158 | } |
159 | ||
160 | static int soc_camera_reqbufs(struct file *file, void *priv, | |
161 | struct v4l2_requestbuffers *p) | |
162 | { | |
163 | int ret; | |
164 | struct soc_camera_file *icf = file->private_data; | |
165 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 166 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
167 | |
168 | WARN_ON(priv != file->private_data); | |
169 | ||
e55222ef GL |
170 | ret = videobuf_reqbufs(&icf->vb_vidq, p); |
171 | if (ret < 0) | |
172 | return ret; | |
173 | ||
b8d9904c | 174 | return ici->ops->reqbufs(icf, p); |
e55222ef GL |
175 | } |
176 | ||
177 | static int soc_camera_querybuf(struct file *file, void *priv, | |
178 | struct v4l2_buffer *p) | |
179 | { | |
180 | struct soc_camera_file *icf = file->private_data; | |
181 | ||
182 | WARN_ON(priv != file->private_data); | |
183 | ||
184 | return videobuf_querybuf(&icf->vb_vidq, p); | |
185 | } | |
186 | ||
187 | static int soc_camera_qbuf(struct file *file, void *priv, | |
188 | struct v4l2_buffer *p) | |
189 | { | |
190 | struct soc_camera_file *icf = file->private_data; | |
191 | ||
192 | WARN_ON(priv != file->private_data); | |
193 | ||
194 | return videobuf_qbuf(&icf->vb_vidq, p); | |
195 | } | |
196 | ||
197 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
198 | struct v4l2_buffer *p) | |
199 | { | |
200 | struct soc_camera_file *icf = file->private_data; | |
201 | ||
202 | WARN_ON(priv != file->private_data); | |
203 | ||
204 | return videobuf_dqbuf(&icf->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
205 | } | |
206 | ||
40e2e092 | 207 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
208 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
209 | { | |
210 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
fa48984e | 211 | int i, fmts = 0, ret; |
c2786ad2 GL |
212 | |
213 | if (!ici->ops->get_formats) | |
214 | /* | |
215 | * Fallback mode - the host will have to serve all | |
216 | * sensor-provided formats one-to-one to the user | |
217 | */ | |
218 | fmts = icd->num_formats; | |
219 | else | |
220 | /* | |
221 | * First pass - only count formats this host-sensor | |
222 | * configuration can provide | |
223 | */ | |
fa48984e GL |
224 | for (i = 0; i < icd->num_formats; i++) { |
225 | ret = ici->ops->get_formats(icd, i, NULL); | |
226 | if (ret < 0) | |
227 | return ret; | |
228 | fmts += ret; | |
229 | } | |
c2786ad2 GL |
230 | |
231 | if (!fmts) | |
232 | return -ENXIO; | |
233 | ||
234 | icd->user_formats = | |
235 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
236 | if (!icd->user_formats) | |
237 | return -ENOMEM; | |
238 | ||
239 | icd->num_user_formats = fmts; | |
c2786ad2 GL |
240 | |
241 | dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts); | |
242 | ||
243 | /* Second pass - actually fill data formats */ | |
14df2cce | 244 | fmts = 0; |
c2786ad2 GL |
245 | for (i = 0; i < icd->num_formats; i++) |
246 | if (!ici->ops->get_formats) { | |
247 | icd->user_formats[i].host_fmt = icd->formats + i; | |
248 | icd->user_formats[i].cam_fmt = icd->formats + i; | |
249 | icd->user_formats[i].buswidth = icd->formats[i].depth; | |
250 | } else { | |
fa48984e GL |
251 | ret = ici->ops->get_formats(icd, i, |
252 | &icd->user_formats[fmts]); | |
253 | if (ret < 0) | |
254 | goto egfmt; | |
255 | fmts += ret; | |
c2786ad2 GL |
256 | } |
257 | ||
258 | icd->current_fmt = icd->user_formats[0].host_fmt; | |
259 | ||
260 | return 0; | |
fa48984e GL |
261 | |
262 | egfmt: | |
263 | icd->num_user_formats = 0; | |
264 | vfree(icd->user_formats); | |
265 | return ret; | |
c2786ad2 GL |
266 | } |
267 | ||
40e2e092 | 268 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
269 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
270 | { | |
fa48984e GL |
271 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
272 | ||
273 | if (ici->ops->put_formats) | |
274 | ici->ops->put_formats(icd); | |
40e2e092 | 275 | icd->current_fmt = NULL; |
fa48984e | 276 | icd->num_user_formats = 0; |
c2786ad2 | 277 | vfree(icd->user_formats); |
40e2e092 | 278 | icd->user_formats = NULL; |
c2786ad2 GL |
279 | } |
280 | ||
df2ed070 GL |
281 | /* Called with .vb_lock held */ |
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 | /* We always call try_fmt() before set_fmt() or set_crop() */ | |
291 | ret = ici->ops->try_fmt(icd, f); | |
292 | if (ret < 0) | |
293 | return ret; | |
294 | ||
295 | ret = ici->ops->set_fmt(icd, f); | |
296 | if (ret < 0) { | |
297 | return ret; | |
298 | } else if (!icd->current_fmt || | |
299 | icd->current_fmt->fourcc != pix->pixelformat) { | |
979ea1dd | 300 | dev_err(ici->v4l2_dev.dev, |
df2ed070 GL |
301 | "Host driver hasn't set up current format correctly!\n"); |
302 | return -EINVAL; | |
303 | } | |
304 | ||
a0705b07 GL |
305 | icd->rect_current.width = pix->width; |
306 | icd->rect_current.height = pix->height; | |
307 | icf->vb_vidq.field = | |
308 | icd->field = pix->field; | |
025c18a1 | 309 | |
df2ed070 GL |
310 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
311 | dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n", | |
312 | f->type); | |
313 | ||
314 | dev_dbg(&icd->dev, "set width: %d height: %d\n", | |
a0705b07 | 315 | icd->rect_current.width, icd->rect_current.height); |
df2ed070 GL |
316 | |
317 | /* set physical bus parameters */ | |
318 | return ici->ops->set_bus_param(icd, pix->pixelformat); | |
319 | } | |
320 | ||
bec43661 | 321 | static int soc_camera_open(struct file *file) |
e55222ef | 322 | { |
979ea1dd GL |
323 | struct video_device *vdev = video_devdata(file); |
324 | struct soc_camera_device *icd = container_of(vdev->parent, struct soc_camera_device, dev); | |
325 | struct soc_camera_link *icl = to_soc_camera_link(icd); | |
9dc4e48f | 326 | struct soc_camera_host *ici; |
e55222ef GL |
327 | struct soc_camera_file *icf; |
328 | int ret; | |
329 | ||
40e2e092 GL |
330 | if (!icd->ops) |
331 | /* No device driver attached */ | |
332 | return -ENODEV; | |
333 | ||
9dc4e48f | 334 | ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 335 | |
40e2e092 GL |
336 | icf = vmalloc(sizeof(*icf)); |
337 | if (!icf) | |
338 | return -ENOMEM; | |
339 | ||
b8d9904c | 340 | if (!try_module_get(ici->ops->owner)) { |
e55222ef GL |
341 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); |
342 | ret = -EINVAL; | |
343 | goto emgi; | |
344 | } | |
345 | ||
40e2e092 | 346 | /* Protect against icd->ops->remove() until we module_get() both drivers. */ |
1c3bb743 GL |
347 | mutex_lock(&icd->video_lock); |
348 | ||
9dc4e48f | 349 | icf->icd = icd; |
1a0063a9 GL |
350 | icd->use_count++; |
351 | ||
9dc4e48f GL |
352 | /* Now we really have to activate the camera */ |
353 | if (icd->use_count == 1) { | |
025c18a1 | 354 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
355 | struct v4l2_format f = { |
356 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
357 | .fmt.pix = { | |
a0705b07 GL |
358 | .width = icd->rect_current.width, |
359 | .height = icd->rect_current.height, | |
025c18a1 | 360 | .field = icd->field, |
fa48984e GL |
361 | .pixelformat = icd->current_fmt->fourcc, |
362 | .colorspace = icd->current_fmt->colorspace, | |
df2ed070 GL |
363 | }, |
364 | }; | |
365 | ||
979ea1dd GL |
366 | if (icl->power) { |
367 | ret = icl->power(icd->pdev, 1); | |
368 | if (ret < 0) | |
369 | goto epower; | |
370 | } | |
371 | ||
372 | /* The camera could have been already on, try to reset */ | |
373 | if (icl->reset) | |
374 | icl->reset(icd->pdev); | |
375 | ||
b8d9904c | 376 | ret = ici->ops->add(icd); |
9dc4e48f GL |
377 | if (ret < 0) { |
378 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
9dc4e48f GL |
379 | goto eiciadd; |
380 | } | |
df2ed070 | 381 | |
979ea1dd GL |
382 | if (icd->ops->init) { |
383 | ret = icd->ops->init(icd); | |
384 | if (ret < 0) | |
385 | goto einit; | |
386 | } | |
387 | ||
df2ed070 GL |
388 | /* Try to configure with default parameters */ |
389 | ret = soc_camera_set_fmt(icf, &f); | |
390 | if (ret < 0) | |
391 | goto esfmt; | |
9dc4e48f GL |
392 | } |
393 | ||
e55222ef GL |
394 | file->private_data = icf; |
395 | dev_dbg(&icd->dev, "camera device open\n"); | |
396 | ||
a034d1b7 | 397 | ici->ops->init_videobuf(&icf->vb_vidq, icd); |
e55222ef | 398 | |
979ea1dd GL |
399 | mutex_unlock(&icd->video_lock); |
400 | ||
e55222ef GL |
401 | return 0; |
402 | ||
df2ed070 | 403 | /* |
979ea1dd | 404 | * First five errors are entered with the .video_lock held |
df2ed070 GL |
405 | * and use_count == 1 |
406 | */ | |
407 | esfmt: | |
979ea1dd GL |
408 | if (icd->ops->release) |
409 | icd->ops->release(icd); | |
410 | einit: | |
df2ed070 | 411 | ici->ops->remove(icd); |
9dc4e48f | 412 | eiciadd: |
979ea1dd GL |
413 | if (icl->power) |
414 | icl->power(icd->pdev, 0); | |
415 | epower: | |
c2786ad2 | 416 | icd->use_count--; |
1c3bb743 | 417 | mutex_unlock(&icd->video_lock); |
b8d9904c | 418 | module_put(ici->ops->owner); |
e55222ef | 419 | emgi: |
e55222ef GL |
420 | vfree(icf); |
421 | return ret; | |
422 | } | |
423 | ||
bec43661 | 424 | static int soc_camera_close(struct file *file) |
e55222ef GL |
425 | { |
426 | struct soc_camera_file *icf = file->private_data; | |
427 | struct soc_camera_device *icd = icf->icd; | |
428 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
429 | struct video_device *vdev = icd->vdev; | |
430 | ||
1c3bb743 | 431 | mutex_lock(&icd->video_lock); |
9dc4e48f | 432 | icd->use_count--; |
40e2e092 | 433 | if (!icd->use_count) { |
979ea1dd GL |
434 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
435 | ||
436 | if (icd->ops->release) | |
437 | icd->ops->release(icd); | |
b8d9904c | 438 | ici->ops->remove(icd); |
979ea1dd GL |
439 | if (icl->power) |
440 | icl->power(icd->pdev, 0); | |
40e2e092 | 441 | } |
025c18a1 | 442 | |
1c3bb743 GL |
443 | mutex_unlock(&icd->video_lock); |
444 | ||
b8d9904c | 445 | module_put(ici->ops->owner); |
9dc4e48f | 446 | |
1a0063a9 | 447 | vfree(icf); |
e55222ef | 448 | |
5e85e732 | 449 | dev_dbg(vdev->parent, "camera device close\n"); |
e55222ef GL |
450 | |
451 | return 0; | |
452 | } | |
453 | ||
aba360d8 | 454 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 455 | size_t count, loff_t *ppos) |
e55222ef GL |
456 | { |
457 | struct soc_camera_file *icf = file->private_data; | |
458 | struct soc_camera_device *icd = icf->icd; | |
459 | struct video_device *vdev = icd->vdev; | |
460 | int err = -EINVAL; | |
461 | ||
5e85e732 | 462 | dev_err(vdev->parent, "camera device read not implemented\n"); |
e55222ef GL |
463 | |
464 | return err; | |
465 | } | |
466 | ||
467 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
468 | { | |
469 | struct soc_camera_file *icf = file->private_data; | |
470 | struct soc_camera_device *icd = icf->icd; | |
471 | int err; | |
472 | ||
473 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
474 | ||
475 | err = videobuf_mmap_mapper(&icf->vb_vidq, vma); | |
476 | ||
477 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
478 | (unsigned long)vma->vm_start, | |
479 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
480 | err); | |
481 | ||
482 | return err; | |
483 | } | |
484 | ||
485 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
486 | { | |
487 | struct soc_camera_file *icf = file->private_data; | |
488 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 489 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
490 | |
491 | if (list_empty(&icf->vb_vidq.stream)) { | |
492 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); | |
493 | return POLLERR; | |
494 | } | |
495 | ||
b8d9904c | 496 | return ici->ops->poll(file, pt); |
e55222ef GL |
497 | } |
498 | ||
bec43661 | 499 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
500 | .owner = THIS_MODULE, |
501 | .open = soc_camera_open, | |
502 | .release = soc_camera_close, | |
503 | .ioctl = video_ioctl2, | |
504 | .read = soc_camera_read, | |
505 | .mmap = soc_camera_mmap, | |
506 | .poll = soc_camera_poll, | |
e55222ef GL |
507 | }; |
508 | ||
72937890 | 509 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 510 | struct v4l2_format *f) |
e55222ef GL |
511 | { |
512 | struct soc_camera_file *icf = file->private_data; | |
513 | struct soc_camera_device *icd = icf->icd; | |
e55222ef | 514 | int ret; |
e55222ef GL |
515 | |
516 | WARN_ON(priv != file->private_data); | |
517 | ||
1c3bb743 GL |
518 | mutex_lock(&icf->vb_vidq.vb_lock); |
519 | ||
b897a91a GL |
520 | if (icf->vb_vidq.bufs[0]) { |
521 | dev_err(&icd->dev, "S_FMT denied: queue initialised\n"); | |
1c3bb743 GL |
522 | ret = -EBUSY; |
523 | goto unlock; | |
524 | } | |
525 | ||
df2ed070 | 526 | ret = soc_camera_set_fmt(icf, f); |
1c3bb743 GL |
527 | |
528 | unlock: | |
529 | mutex_unlock(&icf->vb_vidq.vb_lock); | |
530 | ||
531 | return ret; | |
e55222ef GL |
532 | } |
533 | ||
72937890 | 534 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 535 | struct v4l2_fmtdesc *f) |
e55222ef GL |
536 | { |
537 | struct soc_camera_file *icf = file->private_data; | |
538 | struct soc_camera_device *icd = icf->icd; | |
539 | const struct soc_camera_data_format *format; | |
540 | ||
541 | WARN_ON(priv != file->private_data); | |
542 | ||
c2786ad2 | 543 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
544 | return -EINVAL; |
545 | ||
c2786ad2 | 546 | format = icd->user_formats[f->index].host_fmt; |
e55222ef GL |
547 | |
548 | strlcpy(f->description, format->name, sizeof(f->description)); | |
549 | f->pixelformat = format->fourcc; | |
550 | return 0; | |
551 | } | |
552 | ||
72937890 | 553 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 554 | struct v4l2_format *f) |
e55222ef GL |
555 | { |
556 | struct soc_camera_file *icf = file->private_data; | |
557 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 558 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
559 | |
560 | WARN_ON(priv != file->private_data); | |
561 | ||
a0705b07 GL |
562 | pix->width = icd->rect_current.width; |
563 | pix->height = icd->rect_current.height; | |
64f5905e GL |
564 | pix->field = icf->vb_vidq.field; |
565 | pix->pixelformat = icd->current_fmt->fourcc; | |
566 | pix->bytesperline = pix->width * | |
25c4d74e | 567 | DIV_ROUND_UP(icd->current_fmt->depth, 8); |
64f5905e | 568 | pix->sizeimage = pix->height * pix->bytesperline; |
e55222ef GL |
569 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", |
570 | icd->current_fmt->fourcc); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | static int soc_camera_querycap(struct file *file, void *priv, | |
575 | struct v4l2_capability *cap) | |
576 | { | |
577 | struct soc_camera_file *icf = file->private_data; | |
578 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 579 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
580 | |
581 | WARN_ON(priv != file->private_data); | |
582 | ||
583 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 584 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
585 | } |
586 | ||
587 | static int soc_camera_streamon(struct file *file, void *priv, | |
588 | enum v4l2_buf_type i) | |
589 | { | |
590 | struct soc_camera_file *icf = file->private_data; | |
591 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 592 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 593 | int ret; |
e55222ef GL |
594 | |
595 | WARN_ON(priv != file->private_data); | |
596 | ||
e55222ef GL |
597 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
598 | return -EINVAL; | |
599 | ||
1c3bb743 GL |
600 | mutex_lock(&icd->video_lock); |
601 | ||
c9c1f1c0 | 602 | v4l2_subdev_call(sd, video, s_stream, 1); |
e55222ef GL |
603 | |
604 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | |
1c3bb743 GL |
605 | ret = videobuf_streamon(&icf->vb_vidq); |
606 | ||
607 | mutex_unlock(&icd->video_lock); | |
608 | ||
609 | return ret; | |
e55222ef GL |
610 | } |
611 | ||
612 | static int soc_camera_streamoff(struct file *file, void *priv, | |
613 | enum v4l2_buf_type i) | |
614 | { | |
615 | struct soc_camera_file *icf = file->private_data; | |
616 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 617 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef GL |
618 | |
619 | WARN_ON(priv != file->private_data); | |
620 | ||
e55222ef GL |
621 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
622 | return -EINVAL; | |
623 | ||
1c3bb743 GL |
624 | mutex_lock(&icd->video_lock); |
625 | ||
e55222ef GL |
626 | /* This calls buf_release from host driver's videobuf_queue_ops for all |
627 | * remaining buffers. When the last buffer is freed, stop capture */ | |
628 | videobuf_streamoff(&icf->vb_vidq); | |
629 | ||
c9c1f1c0 | 630 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef | 631 | |
1c3bb743 GL |
632 | mutex_unlock(&icd->video_lock); |
633 | ||
e55222ef GL |
634 | return 0; |
635 | } | |
636 | ||
637 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
638 | struct v4l2_queryctrl *qc) | |
639 | { | |
640 | struct soc_camera_file *icf = file->private_data; | |
641 | struct soc_camera_device *icd = icf->icd; | |
2840d249 | 642 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
643 | int i; |
644 | ||
645 | WARN_ON(priv != file->private_data); | |
646 | ||
647 | if (!qc->id) | |
648 | return -EINVAL; | |
649 | ||
2840d249 GL |
650 | /* First check host controls */ |
651 | for (i = 0; i < ici->ops->num_controls; i++) | |
652 | if (qc->id == ici->ops->controls[i].id) { | |
653 | memcpy(qc, &(ici->ops->controls[i]), | |
654 | sizeof(*qc)); | |
655 | return 0; | |
656 | } | |
657 | ||
658 | /* Then device controls */ | |
e55222ef GL |
659 | for (i = 0; i < icd->ops->num_controls; i++) |
660 | if (qc->id == icd->ops->controls[i].id) { | |
661 | memcpy(qc, &(icd->ops->controls[i]), | |
662 | sizeof(*qc)); | |
663 | return 0; | |
664 | } | |
665 | ||
666 | return -EINVAL; | |
667 | } | |
668 | ||
669 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
670 | struct v4l2_control *ctrl) | |
671 | { | |
672 | struct soc_camera_file *icf = file->private_data; | |
673 | struct soc_camera_device *icd = icf->icd; | |
979ea1dd | 674 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 675 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 676 | int ret; |
e55222ef GL |
677 | |
678 | WARN_ON(priv != file->private_data); | |
679 | ||
680 | switch (ctrl->id) { | |
681 | case V4L2_CID_GAIN: | |
682 | if (icd->gain == (unsigned short)~0) | |
683 | return -EINVAL; | |
684 | ctrl->value = icd->gain; | |
685 | return 0; | |
686 | case V4L2_CID_EXPOSURE: | |
687 | if (icd->exposure == (unsigned short)~0) | |
688 | return -EINVAL; | |
689 | ctrl->value = icd->exposure; | |
690 | return 0; | |
691 | } | |
692 | ||
2840d249 GL |
693 | if (ici->ops->get_ctrl) { |
694 | ret = ici->ops->get_ctrl(icd, ctrl); | |
695 | if (ret != -ENOIOCTLCMD) | |
696 | return ret; | |
697 | } | |
698 | ||
c9c1f1c0 | 699 | return v4l2_subdev_call(sd, core, g_ctrl, ctrl); |
e55222ef GL |
700 | } |
701 | ||
702 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
703 | struct v4l2_control *ctrl) | |
704 | { | |
705 | struct soc_camera_file *icf = file->private_data; | |
706 | struct soc_camera_device *icd = icf->icd; | |
979ea1dd | 707 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 708 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 709 | int ret; |
e55222ef GL |
710 | |
711 | WARN_ON(priv != file->private_data); | |
712 | ||
2840d249 GL |
713 | if (ici->ops->set_ctrl) { |
714 | ret = ici->ops->set_ctrl(icd, ctrl); | |
715 | if (ret != -ENOIOCTLCMD) | |
716 | return ret; | |
717 | } | |
718 | ||
c9c1f1c0 | 719 | return v4l2_subdev_call(sd, core, s_ctrl, ctrl); |
e55222ef GL |
720 | } |
721 | ||
722 | static int soc_camera_cropcap(struct file *file, void *fh, | |
723 | struct v4l2_cropcap *a) | |
724 | { | |
725 | struct soc_camera_file *icf = file->private_data; | |
726 | struct soc_camera_device *icd = icf->icd; | |
727 | ||
728 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
a0705b07 GL |
729 | a->bounds = icd->rect_max; |
730 | a->defrect.left = icd->rect_max.left; | |
731 | a->defrect.top = icd->rect_max.top; | |
df2ed070 GL |
732 | a->defrect.width = DEFAULT_WIDTH; |
733 | a->defrect.height = DEFAULT_HEIGHT; | |
e55222ef GL |
734 | a->pixelaspect.numerator = 1; |
735 | a->pixelaspect.denominator = 1; | |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
740 | static int soc_camera_g_crop(struct file *file, void *fh, | |
741 | struct v4l2_crop *a) | |
742 | { | |
743 | struct soc_camera_file *icf = file->private_data; | |
744 | struct soc_camera_device *icd = icf->icd; | |
745 | ||
a0705b07 GL |
746 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
747 | a->c = icd->rect_current; | |
e55222ef GL |
748 | |
749 | return 0; | |
750 | } | |
751 | ||
68a54f0e GL |
752 | /* |
753 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
754 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
755 | * retrieve it. However, we expect camera host and client drivers to update | |
756 | * the argument, which we then use internally, but do not return to the user. | |
757 | */ | |
e55222ef GL |
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; | |
64f5905e | 763 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
68a54f0e | 764 | struct v4l2_rect rect = a->c; |
e55222ef GL |
765 | int ret; |
766 | ||
767 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
768 | return -EINVAL; | |
769 | ||
1c3bb743 GL |
770 | /* Cropping is allowed during a running capture, guard consistency */ |
771 | mutex_lock(&icf->vb_vidq.vb_lock); | |
772 | ||
b897a91a GL |
773 | /* Prohibit window size change with initialised buffers */ |
774 | if (icf->vb_vidq.bufs[0] && (rect.width != icd->rect_current.width || | |
775 | rect.height != icd->rect_current.height)) { | |
776 | dev_err(&icd->dev, | |
777 | "S_CROP denied: queue initialised and sizes differ\n"); | |
778 | ret = -EBUSY; | |
779 | goto unlock; | |
780 | } | |
781 | ||
68a54f0e GL |
782 | if (rect.width > icd->rect_max.width) |
783 | rect.width = icd->rect_max.width; | |
a0705b07 | 784 | |
68a54f0e GL |
785 | if (rect.width < icd->width_min) |
786 | rect.width = icd->width_min; | |
a0705b07 | 787 | |
68a54f0e GL |
788 | if (rect.height > icd->rect_max.height) |
789 | rect.height = icd->rect_max.height; | |
a0705b07 | 790 | |
68a54f0e GL |
791 | if (rect.height < icd->height_min) |
792 | rect.height = icd->height_min; | |
a0705b07 | 793 | |
68a54f0e GL |
794 | if (rect.width + rect.left > icd->rect_max.width + icd->rect_max.left) |
795 | rect.left = icd->rect_max.width + icd->rect_max.left - | |
796 | rect.width; | |
a0705b07 | 797 | |
68a54f0e GL |
798 | if (rect.height + rect.top > icd->rect_max.height + icd->rect_max.top) |
799 | rect.top = icd->rect_max.height + icd->rect_max.top - | |
800 | rect.height; | |
a0705b07 | 801 | |
08590b96 | 802 | ret = ici->ops->set_crop(icd, a); |
a0705b07 | 803 | if (!ret) |
68a54f0e | 804 | icd->rect_current = rect; |
e55222ef | 805 | |
b897a91a | 806 | unlock: |
1c3bb743 GL |
807 | mutex_unlock(&icf->vb_vidq.vb_lock); |
808 | ||
e55222ef GL |
809 | return ret; |
810 | } | |
811 | ||
812 | static int soc_camera_g_chip_ident(struct file *file, void *fh, | |
aecde8b5 | 813 | struct v4l2_dbg_chip_ident *id) |
e55222ef GL |
814 | { |
815 | struct soc_camera_file *icf = file->private_data; | |
816 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 817 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 818 | |
c9c1f1c0 | 819 | return v4l2_subdev_call(sd, core, g_chip_ident, id); |
e55222ef GL |
820 | } |
821 | ||
822 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
823 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 824 | struct v4l2_dbg_register *reg) |
e55222ef GL |
825 | { |
826 | struct soc_camera_file *icf = file->private_data; | |
827 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 828 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 829 | |
c9c1f1c0 | 830 | return v4l2_subdev_call(sd, core, g_register, reg); |
e55222ef GL |
831 | } |
832 | ||
833 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 834 | struct v4l2_dbg_register *reg) |
e55222ef GL |
835 | { |
836 | struct soc_camera_file *icf = file->private_data; | |
837 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 838 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 839 | |
c9c1f1c0 | 840 | return v4l2_subdev_call(sd, core, s_register, reg); |
e55222ef GL |
841 | } |
842 | #endif | |
843 | ||
e55222ef GL |
844 | /* So far this function cannot fail */ |
845 | static void scan_add_host(struct soc_camera_host *ici) | |
846 | { | |
847 | struct soc_camera_device *icd; | |
848 | ||
849 | mutex_lock(&list_lock); | |
850 | ||
851 | list_for_each_entry(icd, &devices, list) { | |
852 | if (icd->iface == ici->nr) { | |
40e2e092 | 853 | int ret; |
979ea1dd | 854 | icd->dev.parent = ici->v4l2_dev.dev; |
40e2e092 GL |
855 | dev_set_name(&icd->dev, "%u-%u", icd->iface, |
856 | icd->devnum); | |
857 | ret = device_register(&icd->dev); | |
858 | if (ret < 0) { | |
859 | icd->dev.parent = NULL; | |
860 | dev_err(&icd->dev, | |
861 | "Cannot register device: %d\n", ret); | |
862 | } | |
e55222ef GL |
863 | } |
864 | } | |
865 | ||
866 | mutex_unlock(&list_lock); | |
867 | } | |
868 | ||
40e2e092 GL |
869 | #ifdef CONFIG_I2C_BOARDINFO |
870 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | |
871 | struct soc_camera_link *icl) | |
e55222ef | 872 | { |
40e2e092 | 873 | struct i2c_client *client; |
979ea1dd | 874 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
40e2e092 | 875 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); |
979ea1dd | 876 | struct v4l2_subdev *subdev; |
40e2e092 | 877 | int ret; |
e55222ef | 878 | |
40e2e092 GL |
879 | if (!adap) { |
880 | ret = -ENODEV; | |
881 | dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n", | |
882 | icl->i2c_adapter_id); | |
883 | goto ei2cga; | |
884 | } | |
e55222ef | 885 | |
40e2e092 | 886 | icl->board_info->platform_data = icd; |
e55222ef | 887 | |
979ea1dd GL |
888 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
889 | icl->module_name, icl->board_info, NULL); | |
890 | if (!subdev) { | |
40e2e092 GL |
891 | ret = -ENOMEM; |
892 | goto ei2cnd; | |
e55222ef GL |
893 | } |
894 | ||
979ea1dd GL |
895 | subdev->grp_id = (__u32)icd; |
896 | client = subdev->priv; | |
897 | ||
40e2e092 GL |
898 | /* Use to_i2c_client(dev) to recover the i2c client */ |
899 | dev_set_drvdata(&icd->dev, &client->dev); | |
e55222ef | 900 | |
40e2e092 GL |
901 | return 0; |
902 | ei2cnd: | |
903 | i2c_put_adapter(adap); | |
904 | ei2cga: | |
e55222ef GL |
905 | return ret; |
906 | } | |
907 | ||
40e2e092 GL |
908 | static void soc_camera_free_i2c(struct soc_camera_device *icd) |
909 | { | |
910 | struct i2c_client *client = | |
911 | to_i2c_client(to_soc_camera_control(icd)); | |
912 | dev_set_drvdata(&icd->dev, NULL); | |
979ea1dd | 913 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 GL |
914 | i2c_unregister_device(client); |
915 | i2c_put_adapter(client->adapter); | |
916 | } | |
917 | #else | |
918 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | |
919 | #define soc_camera_free_i2c(icd) do {} while (0) | |
920 | #endif | |
921 | ||
979ea1dd | 922 | static int soc_camera_video_start(struct soc_camera_device *icd); |
40e2e092 GL |
923 | static int video_dev_create(struct soc_camera_device *icd); |
924 | /* Called during host-driver probe */ | |
e55222ef GL |
925 | static int soc_camera_probe(struct device *dev) |
926 | { | |
927 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
979ea1dd | 928 | struct soc_camera_host *ici = to_soc_camera_host(dev->parent); |
40e2e092 | 929 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
979ea1dd | 930 | struct device *control = NULL; |
e55222ef GL |
931 | int ret; |
932 | ||
40e2e092 | 933 | dev_info(dev, "Probing %s\n", dev_name(dev)); |
1c3bb743 | 934 | |
979ea1dd GL |
935 | if (icl->power) { |
936 | ret = icl->power(icd->pdev, 1); | |
937 | if (ret < 0) { | |
938 | dev_err(dev, | |
939 | "Platform failed to power-on the camera.\n"); | |
940 | goto epower; | |
941 | } | |
942 | } | |
943 | ||
944 | /* The camera could have been already on, try to reset */ | |
945 | if (icl->reset) | |
946 | icl->reset(icd->pdev); | |
947 | ||
948 | ret = ici->ops->add(icd); | |
949 | if (ret < 0) | |
950 | goto eadd; | |
951 | ||
952 | /* Must have icd->vdev before registering the device */ | |
40e2e092 GL |
953 | ret = video_dev_create(icd); |
954 | if (ret < 0) | |
955 | goto evdc; | |
1c3bb743 | 956 | |
40e2e092 GL |
957 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
958 | if (icl->board_info) { | |
959 | ret = soc_camera_init_i2c(icd, icl); | |
960 | if (ret < 0) | |
961 | goto eadddev; | |
962 | } else if (!icl->add_device || !icl->del_device) { | |
1c3bb743 | 963 | ret = -EINVAL; |
40e2e092 GL |
964 | goto eadddev; |
965 | } else { | |
979ea1dd GL |
966 | if (icl->module_name) |
967 | ret = request_module(icl->module_name); | |
968 | ||
40e2e092 GL |
969 | ret = icl->add_device(icl, &icd->dev); |
970 | if (ret < 0) | |
971 | goto eadddev; | |
1c3bb743 | 972 | |
979ea1dd GL |
973 | /* FIXME: this is racy, have to use driver-binding notification */ |
974 | control = to_soc_camera_control(icd); | |
08590b96 | 975 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd GL |
976 | !try_module_get(control->driver->owner)) { |
977 | icl->del_device(icl); | |
978 | goto enodrv; | |
979 | } | |
40e2e092 | 980 | } |
e55222ef | 981 | |
fa48984e GL |
982 | /* At this point client .probe() should have run already */ |
983 | ret = soc_camera_init_user_formats(icd); | |
984 | if (ret < 0) | |
985 | goto eiufmt; | |
986 | ||
987 | icd->rect_current = icd->rect_max; | |
988 | icd->field = V4L2_FIELD_ANY; | |
989 | ||
979ea1dd GL |
990 | /* ..._video_start() will create a device node, so we have to protect */ |
991 | mutex_lock(&icd->video_lock); | |
992 | ||
993 | ret = soc_camera_video_start(icd); | |
994 | if (ret < 0) | |
995 | goto evidstart; | |
996 | ||
40e2e092 GL |
997 | /* Do we have to sysfs_remove_link() before device_unregister()? */ |
998 | if (to_soc_camera_control(icd) && | |
999 | sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj, | |
1000 | "control")) | |
1001 | dev_warn(&icd->dev, "Failed creating the control symlink\n"); | |
025c18a1 | 1002 | |
979ea1dd GL |
1003 | ici->ops->remove(icd); |
1004 | ||
1005 | if (icl->power) | |
1006 | icl->power(icd->pdev, 0); | |
1007 | ||
1008 | mutex_unlock(&icd->video_lock); | |
025c18a1 | 1009 | |
40e2e092 | 1010 | return 0; |
e55222ef | 1011 | |
979ea1dd GL |
1012 | evidstart: |
1013 | mutex_unlock(&icd->video_lock); | |
fa48984e GL |
1014 | soc_camera_free_user_formats(icd); |
1015 | eiufmt: | |
979ea1dd | 1016 | if (icl->board_info) { |
40e2e092 | 1017 | soc_camera_free_i2c(icd); |
979ea1dd | 1018 | } else { |
40e2e092 | 1019 | icl->del_device(icl); |
979ea1dd GL |
1020 | module_put(control->driver->owner); |
1021 | } | |
1022 | enodrv: | |
40e2e092 GL |
1023 | eadddev: |
1024 | video_device_release(icd->vdev); | |
1025 | evdc: | |
979ea1dd GL |
1026 | ici->ops->remove(icd); |
1027 | eadd: | |
1028 | if (icl->power) | |
1029 | icl->power(icd->pdev, 0); | |
1030 | epower: | |
e55222ef GL |
1031 | return ret; |
1032 | } | |
1033 | ||
1034 | /* This is called on device_unregister, which only means we have to disconnect | |
1035 | * from the host, but not remove ourselves from the device list */ | |
1036 | static int soc_camera_remove(struct device *dev) | |
1037 | { | |
1038 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
40e2e092 GL |
1039 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
1040 | struct video_device *vdev = icd->vdev; | |
e55222ef | 1041 | |
40e2e092 | 1042 | BUG_ON(!dev->parent); |
e55222ef | 1043 | |
40e2e092 GL |
1044 | if (vdev) { |
1045 | mutex_lock(&icd->video_lock); | |
1046 | video_unregister_device(vdev); | |
1047 | icd->vdev = NULL; | |
1048 | mutex_unlock(&icd->video_lock); | |
1049 | } | |
1050 | ||
979ea1dd | 1051 | if (icl->board_info) { |
40e2e092 | 1052 | soc_camera_free_i2c(icd); |
979ea1dd GL |
1053 | } else { |
1054 | struct device_driver *drv = to_soc_camera_control(icd) ? | |
1055 | to_soc_camera_control(icd)->driver : NULL; | |
1056 | if (drv) { | |
1057 | icl->del_device(icl); | |
1058 | module_put(drv->owner); | |
1059 | } | |
1060 | } | |
fa48984e | 1061 | soc_camera_free_user_formats(icd); |
025c18a1 | 1062 | |
e55222ef GL |
1063 | return 0; |
1064 | } | |
1065 | ||
2e521061 RJ |
1066 | static int soc_camera_suspend(struct device *dev, pm_message_t state) |
1067 | { | |
1068 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1069 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1070 | int ret = 0; | |
1071 | ||
1072 | if (ici->ops->suspend) | |
1073 | ret = ici->ops->suspend(icd, state); | |
1074 | ||
1075 | return ret; | |
1076 | } | |
1077 | ||
1078 | static int soc_camera_resume(struct device *dev) | |
1079 | { | |
1080 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1081 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1082 | int ret = 0; | |
1083 | ||
1084 | if (ici->ops->resume) | |
1085 | ret = ici->ops->resume(icd); | |
1086 | ||
1087 | return ret; | |
1088 | } | |
1089 | ||
e55222ef GL |
1090 | static struct bus_type soc_camera_bus_type = { |
1091 | .name = "soc-camera", | |
1092 | .probe = soc_camera_probe, | |
1093 | .remove = soc_camera_remove, | |
2e521061 RJ |
1094 | .suspend = soc_camera_suspend, |
1095 | .resume = soc_camera_resume, | |
e55222ef GL |
1096 | }; |
1097 | ||
1098 | static struct device_driver ic_drv = { | |
1099 | .name = "camera", | |
1100 | .bus = &soc_camera_bus_type, | |
1101 | .owner = THIS_MODULE, | |
1102 | }; | |
1103 | ||
e55222ef GL |
1104 | static void dummy_release(struct device *dev) |
1105 | { | |
1106 | } | |
1107 | ||
b8d9904c | 1108 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1109 | { |
e55222ef | 1110 | struct soc_camera_host *ix; |
979ea1dd | 1111 | int ret; |
e55222ef | 1112 | |
64f5905e GL |
1113 | if (!ici || !ici->ops || |
1114 | !ici->ops->try_fmt || | |
1115 | !ici->ops->set_fmt || | |
09e231b3 | 1116 | !ici->ops->set_crop || |
64f5905e GL |
1117 | !ici->ops->set_bus_param || |
1118 | !ici->ops->querycap || | |
1119 | !ici->ops->init_videobuf || | |
1120 | !ici->ops->reqbufs || | |
1121 | !ici->ops->add || | |
1122 | !ici->ops->remove || | |
eff505fa | 1123 | !ici->ops->poll || |
979ea1dd | 1124 | !ici->v4l2_dev.dev) |
e55222ef GL |
1125 | return -EINVAL; |
1126 | ||
e55222ef GL |
1127 | mutex_lock(&list_lock); |
1128 | list_for_each_entry(ix, &hosts, list) { | |
1129 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1130 | ret = -EBUSY; |
1131 | goto edevreg; | |
e55222ef GL |
1132 | } |
1133 | } | |
1134 | ||
979ea1dd GL |
1135 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1136 | if (ret < 0) | |
1137 | goto edevreg; | |
eff505fa | 1138 | |
e55222ef GL |
1139 | list_add_tail(&ici->list, &hosts); |
1140 | mutex_unlock(&list_lock); | |
1141 | ||
e55222ef GL |
1142 | scan_add_host(ici); |
1143 | ||
1144 | return 0; | |
979ea1dd GL |
1145 | |
1146 | edevreg: | |
1147 | mutex_unlock(&list_lock); | |
1148 | return ret; | |
e55222ef GL |
1149 | } |
1150 | EXPORT_SYMBOL(soc_camera_host_register); | |
1151 | ||
1152 | /* Unregister all clients! */ | |
1153 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1154 | { | |
1155 | struct soc_camera_device *icd; | |
1156 | ||
1157 | mutex_lock(&list_lock); | |
1158 | ||
1159 | list_del(&ici->list); | |
1160 | ||
1161 | list_for_each_entry(icd, &devices, list) { | |
979ea1dd | 1162 | if (icd->iface == ici->nr) { |
40e2e092 | 1163 | /* The bus->remove will be called */ |
e55222ef GL |
1164 | device_unregister(&icd->dev); |
1165 | /* Not before device_unregister(), .remove | |
b8d9904c | 1166 | * needs parent to call ici->ops->remove() */ |
e55222ef | 1167 | icd->dev.parent = NULL; |
40e2e092 GL |
1168 | |
1169 | /* If the host module is loaded again, device_register() | |
1170 | * would complain "already initialised" */ | |
e55222ef GL |
1171 | memset(&icd->dev.kobj, 0, sizeof(icd->dev.kobj)); |
1172 | } | |
1173 | } | |
1174 | ||
1175 | mutex_unlock(&list_lock); | |
1176 | ||
979ea1dd | 1177 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1178 | } |
1179 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1180 | ||
1181 | /* Image capture device */ | |
40e2e092 | 1182 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1183 | { |
1184 | struct soc_camera_device *ix; | |
1185 | int num = -1, i; | |
1186 | ||
e55222ef GL |
1187 | for (i = 0; i < 256 && num < 0; i++) { |
1188 | num = i; | |
40e2e092 | 1189 | /* Check if this index is available on this interface */ |
e55222ef GL |
1190 | list_for_each_entry(ix, &devices, list) { |
1191 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1192 | num = -1; | |
1193 | break; | |
1194 | } | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | if (num < 0) | |
1199 | /* ok, we have 256 cameras on this host... | |
1200 | * man, stay reasonable... */ | |
1201 | return -ENOMEM; | |
1202 | ||
1203 | icd->devnum = num; | |
1204 | icd->dev.bus = &soc_camera_bus_type; | |
e55222ef | 1205 | |
64f5905e GL |
1206 | icd->dev.release = dummy_release; |
1207 | icd->use_count = 0; | |
1208 | icd->host_priv = NULL; | |
1c3bb743 | 1209 | mutex_init(&icd->video_lock); |
e55222ef | 1210 | |
40e2e092 GL |
1211 | list_add_tail(&icd->list, &devices); |
1212 | ||
1213 | return 0; | |
e55222ef | 1214 | } |
e55222ef | 1215 | |
40e2e092 | 1216 | static void soc_camera_device_unregister(struct soc_camera_device *icd) |
e55222ef | 1217 | { |
e55222ef | 1218 | list_del(&icd->list); |
e55222ef | 1219 | } |
e55222ef | 1220 | |
a399810c HV |
1221 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1222 | .vidioc_querycap = soc_camera_querycap, | |
1223 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | |
1224 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | |
1225 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | |
1226 | .vidioc_enum_input = soc_camera_enum_input, | |
1227 | .vidioc_g_input = soc_camera_g_input, | |
1228 | .vidioc_s_input = soc_camera_s_input, | |
1229 | .vidioc_s_std = soc_camera_s_std, | |
1230 | .vidioc_reqbufs = soc_camera_reqbufs, | |
1231 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | |
1232 | .vidioc_querybuf = soc_camera_querybuf, | |
1233 | .vidioc_qbuf = soc_camera_qbuf, | |
1234 | .vidioc_dqbuf = soc_camera_dqbuf, | |
1235 | .vidioc_streamon = soc_camera_streamon, | |
1236 | .vidioc_streamoff = soc_camera_streamoff, | |
1237 | .vidioc_queryctrl = soc_camera_queryctrl, | |
1238 | .vidioc_g_ctrl = soc_camera_g_ctrl, | |
1239 | .vidioc_s_ctrl = soc_camera_s_ctrl, | |
1240 | .vidioc_cropcap = soc_camera_cropcap, | |
1241 | .vidioc_g_crop = soc_camera_g_crop, | |
1242 | .vidioc_s_crop = soc_camera_s_crop, | |
1243 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, | |
1244 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1245 | .vidioc_g_register = soc_camera_g_register, | |
1246 | .vidioc_s_register = soc_camera_s_register, | |
1247 | #endif | |
1248 | }; | |
1249 | ||
40e2e092 | 1250 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef GL |
1251 | { |
1252 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
40e2e092 | 1253 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 1254 | |
e55222ef | 1255 | if (!vdev) |
40e2e092 | 1256 | return -ENOMEM; |
e55222ef GL |
1257 | |
1258 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1259 | |
5e85e732 | 1260 | vdev->parent = &icd->dev; |
e55222ef GL |
1261 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1262 | vdev->fops = &soc_camera_fops; | |
a399810c | 1263 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef GL |
1264 | vdev->release = video_device_release; |
1265 | vdev->minor = -1; | |
40e2e092 | 1266 | vdev->tvnorms = V4L2_STD_UNKNOWN; |
e55222ef | 1267 | |
e55222ef GL |
1268 | icd->vdev = vdev; |
1269 | ||
1270 | return 0; | |
40e2e092 | 1271 | } |
e55222ef | 1272 | |
40e2e092 | 1273 | /* |
979ea1dd | 1274 | * Called from soc_camera_probe() above (with .video_lock held???) |
40e2e092 | 1275 | */ |
979ea1dd | 1276 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 1277 | { |
40e2e092 | 1278 | const struct v4l2_queryctrl *qctrl; |
979ea1dd | 1279 | int ret; |
40e2e092 GL |
1280 | |
1281 | if (!icd->dev.parent) | |
1282 | return -ENODEV; | |
1283 | ||
1284 | if (!icd->ops || | |
40e2e092 GL |
1285 | !icd->ops->query_bus_param || |
1286 | !icd->ops->set_bus_param) | |
1287 | return -EINVAL; | |
1288 | ||
979ea1dd GL |
1289 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, |
1290 | icd->vdev->minor); | |
1291 | if (ret < 0) { | |
1292 | dev_err(&icd->dev, "video_register_device failed: %d\n", ret); | |
1293 | return ret; | |
1294 | } | |
40e2e092 GL |
1295 | |
1296 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_GAIN); | |
1297 | icd->gain = qctrl ? qctrl->default_value : (unsigned short)~0; | |
1298 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
1299 | icd->exposure = qctrl ? qctrl->default_value : (unsigned short)~0; | |
1300 | ||
979ea1dd | 1301 | return 0; |
e55222ef | 1302 | } |
e55222ef | 1303 | |
40e2e092 | 1304 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 1305 | { |
40e2e092 GL |
1306 | struct soc_camera_link *icl = pdev->dev.platform_data; |
1307 | struct soc_camera_device *icd; | |
c41debaf | 1308 | int ret; |
0fd327bd | 1309 | |
40e2e092 GL |
1310 | if (!icl) |
1311 | return -EINVAL; | |
0fd327bd | 1312 | |
40e2e092 GL |
1313 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); |
1314 | if (!icd) | |
1315 | return -ENOMEM; | |
0fd327bd | 1316 | |
40e2e092 | 1317 | icd->iface = icl->bus_id; |
979ea1dd | 1318 | icd->pdev = &pdev->dev; |
40e2e092 GL |
1319 | platform_set_drvdata(pdev, icd); |
1320 | icd->dev.platform_data = icl; | |
0fd327bd | 1321 | |
40e2e092 GL |
1322 | ret = soc_camera_device_register(icd); |
1323 | if (ret < 0) | |
1324 | goto escdevreg; | |
0fd327bd | 1325 | |
40e2e092 | 1326 | return 0; |
0fd327bd | 1327 | |
40e2e092 GL |
1328 | escdevreg: |
1329 | kfree(icd); | |
0fd327bd | 1330 | |
40e2e092 | 1331 | return ret; |
c41debaf | 1332 | } |
0fd327bd | 1333 | |
40e2e092 GL |
1334 | /* Only called on rmmod for each platform device, since they are not |
1335 | * hot-pluggable. Now we know, that all our users - hosts and devices have | |
1336 | * been unloaded already */ | |
1337 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) | |
c41debaf | 1338 | { |
40e2e092 | 1339 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
c41debaf | 1340 | |
40e2e092 | 1341 | if (!icd) |
c41debaf GL |
1342 | return -EINVAL; |
1343 | ||
40e2e092 | 1344 | soc_camera_device_unregister(icd); |
c41debaf | 1345 | |
40e2e092 | 1346 | kfree(icd); |
c41debaf | 1347 | |
0fd327bd GL |
1348 | return 0; |
1349 | } | |
1350 | ||
1351 | static struct platform_driver __refdata soc_camera_pdrv = { | |
40e2e092 GL |
1352 | .remove = __devexit_p(soc_camera_pdrv_remove), |
1353 | .driver = { | |
1354 | .name = "soc-camera-pdrv", | |
1355 | .owner = THIS_MODULE, | |
0fd327bd GL |
1356 | }, |
1357 | }; | |
1358 | ||
e55222ef GL |
1359 | static int __init soc_camera_init(void) |
1360 | { | |
1361 | int ret = bus_register(&soc_camera_bus_type); | |
1362 | if (ret) | |
1363 | return ret; | |
1364 | ret = driver_register(&ic_drv); | |
1365 | if (ret) | |
1366 | goto edrvr; | |
e55222ef | 1367 | |
40e2e092 | 1368 | ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
0fd327bd GL |
1369 | if (ret) |
1370 | goto epdr; | |
1371 | ||
e55222ef GL |
1372 | return 0; |
1373 | ||
0fd327bd GL |
1374 | epdr: |
1375 | driver_unregister(&ic_drv); | |
e55222ef GL |
1376 | edrvr: |
1377 | bus_unregister(&soc_camera_bus_type); | |
1378 | return ret; | |
1379 | } | |
1380 | ||
1381 | static void __exit soc_camera_exit(void) | |
1382 | { | |
0fd327bd | 1383 | platform_driver_unregister(&soc_camera_pdrv); |
e55222ef GL |
1384 | driver_unregister(&ic_drv); |
1385 | bus_unregister(&soc_camera_bus_type); | |
1386 | } | |
1387 | ||
1388 | module_init(soc_camera_init); | |
1389 | module_exit(soc_camera_exit); | |
1390 | ||
1391 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1392 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1393 | MODULE_LICENSE("GPL"); | |
0fd327bd | 1394 | MODULE_ALIAS("platform:soc-camera-pdrv"); |