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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> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
4f9fb5ed | 28 | #include <linux/pm_runtime.h> |
e55222ef GL |
29 | #include <linux/vmalloc.h> |
30 | ||
0fd327bd | 31 | #include <media/soc_camera.h> |
e55222ef | 32 | #include <media/v4l2-common.h> |
0fd327bd | 33 | #include <media/v4l2-ioctl.h> |
40e2e092 | 34 | #include <media/v4l2-dev.h> |
092d3921 | 35 | #include <media/videobuf-core.h> |
760697be | 36 | #include <media/soc_mediabus.h> |
e55222ef | 37 | |
df2ed070 GL |
38 | /* Default to VGA resolution */ |
39 | #define DEFAULT_WIDTH 640 | |
40 | #define DEFAULT_HEIGHT 480 | |
41 | ||
e55222ef GL |
42 | static LIST_HEAD(hosts); |
43 | static LIST_HEAD(devices); | |
40e2e092 | 44 | static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ |
e55222ef | 45 | |
c2786ad2 GL |
46 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
47 | struct soc_camera_device *icd, unsigned int fourcc) | |
48 | { | |
49 | unsigned int i; | |
50 | ||
51 | for (i = 0; i < icd->num_user_formats; i++) | |
52 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
53 | return icd->user_formats + i; | |
54 | return NULL; | |
55 | } | |
56 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
57 | ||
bd73b36f GL |
58 | /** |
59 | * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
60 | * @icl: camera platform parameters | |
61 | * @flags: flags to be inverted according to platform configuration | |
62 | * @return: resulting flags | |
63 | */ | |
64 | unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, | |
65 | unsigned long flags) | |
66 | { | |
67 | unsigned long f; | |
68 | ||
69 | /* If only one of the two polarities is supported, switch to the opposite */ | |
70 | if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { | |
71 | f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); | |
72 | if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) | |
73 | flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; | |
74 | } | |
75 | ||
76 | if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { | |
77 | f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); | |
78 | if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) | |
79 | flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; | |
80 | } | |
81 | ||
82 | if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { | |
83 | f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); | |
84 | if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) | |
85 | flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; | |
86 | } | |
87 | ||
88 | return flags; | |
89 | } | |
90 | EXPORT_SYMBOL(soc_camera_apply_sensor_flags); | |
91 | ||
72937890 | 92 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 93 | struct v4l2_format *f) |
e55222ef GL |
94 | { |
95 | struct soc_camera_file *icf = file->private_data; | |
96 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 97 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
98 | |
99 | WARN_ON(priv != file->private_data); | |
100 | ||
ad5f2e85 | 101 | /* limit format to hardware capabilities */ |
06daa1af | 102 | return ici->ops->try_fmt(icd, f); |
e55222ef GL |
103 | } |
104 | ||
105 | static int soc_camera_enum_input(struct file *file, void *priv, | |
106 | struct v4l2_input *inp) | |
107 | { | |
34d359db KM |
108 | struct soc_camera_file *icf = file->private_data; |
109 | struct soc_camera_device *icd = icf->icd; | |
110 | int ret = 0; | |
111 | ||
e55222ef GL |
112 | if (inp->index != 0) |
113 | return -EINVAL; | |
114 | ||
34d359db KM |
115 | if (icd->ops->enum_input) |
116 | ret = icd->ops->enum_input(icd, inp); | |
117 | else { | |
118 | /* default is camera */ | |
119 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
120 | inp->std = V4L2_STD_UNKNOWN; | |
121 | strcpy(inp->name, "Camera"); | |
122 | } | |
e55222ef | 123 | |
34d359db | 124 | return ret; |
e55222ef GL |
125 | } |
126 | ||
127 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
128 | { | |
129 | *i = 0; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
135 | { | |
136 | if (i > 0) | |
137 | return -EINVAL; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | |
143 | { | |
513791ab KM |
144 | struct soc_camera_file *icf = file->private_data; |
145 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 146 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 147 | |
c9c1f1c0 | 148 | return v4l2_subdev_call(sd, core, s_std, *a); |
e55222ef GL |
149 | } |
150 | ||
151 | static int soc_camera_reqbufs(struct file *file, void *priv, | |
152 | struct v4l2_requestbuffers *p) | |
153 | { | |
154 | int ret; | |
155 | struct soc_camera_file *icf = file->private_data; | |
156 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 157 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
158 | |
159 | WARN_ON(priv != file->private_data); | |
160 | ||
e55222ef GL |
161 | ret = videobuf_reqbufs(&icf->vb_vidq, p); |
162 | if (ret < 0) | |
163 | return ret; | |
164 | ||
b8d9904c | 165 | return ici->ops->reqbufs(icf, p); |
e55222ef GL |
166 | } |
167 | ||
168 | static int soc_camera_querybuf(struct file *file, void *priv, | |
169 | struct v4l2_buffer *p) | |
170 | { | |
171 | struct soc_camera_file *icf = file->private_data; | |
172 | ||
173 | WARN_ON(priv != file->private_data); | |
174 | ||
175 | return videobuf_querybuf(&icf->vb_vidq, p); | |
176 | } | |
177 | ||
178 | static int soc_camera_qbuf(struct file *file, void *priv, | |
179 | struct v4l2_buffer *p) | |
180 | { | |
181 | struct soc_camera_file *icf = file->private_data; | |
182 | ||
183 | WARN_ON(priv != file->private_data); | |
184 | ||
185 | return videobuf_qbuf(&icf->vb_vidq, p); | |
186 | } | |
187 | ||
188 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
189 | struct v4l2_buffer *p) | |
190 | { | |
191 | struct soc_camera_file *icf = file->private_data; | |
192 | ||
193 | WARN_ON(priv != file->private_data); | |
194 | ||
195 | return videobuf_dqbuf(&icf->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
196 | } | |
197 | ||
40e2e092 | 198 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
199 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
200 | { | |
760697be | 201 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
c2786ad2 | 202 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
3805f201 HV |
203 | unsigned int i, fmts = 0, raw_fmts = 0; |
204 | int ret; | |
760697be GL |
205 | enum v4l2_mbus_pixelcode code; |
206 | ||
207 | while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) | |
208 | raw_fmts++; | |
c2786ad2 GL |
209 | |
210 | if (!ici->ops->get_formats) | |
211 | /* | |
212 | * Fallback mode - the host will have to serve all | |
213 | * sensor-provided formats one-to-one to the user | |
214 | */ | |
760697be | 215 | fmts = raw_fmts; |
c2786ad2 GL |
216 | else |
217 | /* | |
218 | * First pass - only count formats this host-sensor | |
219 | * configuration can provide | |
220 | */ | |
760697be | 221 | for (i = 0; i < raw_fmts; i++) { |
fa48984e GL |
222 | ret = ici->ops->get_formats(icd, i, NULL); |
223 | if (ret < 0) | |
224 | return ret; | |
225 | fmts += ret; | |
226 | } | |
c2786ad2 GL |
227 | |
228 | if (!fmts) | |
229 | return -ENXIO; | |
230 | ||
231 | icd->user_formats = | |
232 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
233 | if (!icd->user_formats) | |
234 | return -ENOMEM; | |
235 | ||
236 | icd->num_user_formats = fmts; | |
c2786ad2 GL |
237 | |
238 | dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts); | |
239 | ||
240 | /* Second pass - actually fill data formats */ | |
14df2cce | 241 | fmts = 0; |
760697be | 242 | for (i = 0; i < raw_fmts; i++) |
c2786ad2 | 243 | if (!ici->ops->get_formats) { |
760697be GL |
244 | v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); |
245 | icd->user_formats[i].host_fmt = | |
246 | soc_mbus_get_fmtdesc(code); | |
247 | icd->user_formats[i].code = code; | |
c2786ad2 | 248 | } else { |
fa48984e GL |
249 | ret = ici->ops->get_formats(icd, i, |
250 | &icd->user_formats[fmts]); | |
251 | if (ret < 0) | |
252 | goto egfmt; | |
253 | fmts += ret; | |
c2786ad2 GL |
254 | } |
255 | ||
760697be | 256 | icd->current_fmt = &icd->user_formats[0]; |
c2786ad2 GL |
257 | |
258 | return 0; | |
fa48984e GL |
259 | |
260 | egfmt: | |
261 | icd->num_user_formats = 0; | |
262 | vfree(icd->user_formats); | |
263 | return ret; | |
c2786ad2 GL |
264 | } |
265 | ||
40e2e092 | 266 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
267 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
268 | { | |
fa48984e GL |
269 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
270 | ||
271 | if (ici->ops->put_formats) | |
272 | ici->ops->put_formats(icd); | |
40e2e092 | 273 | icd->current_fmt = NULL; |
fa48984e | 274 | icd->num_user_formats = 0; |
c2786ad2 | 275 | vfree(icd->user_formats); |
40e2e092 | 276 | icd->user_formats = NULL; |
c2786ad2 GL |
277 | } |
278 | ||
6a6c8786 GL |
279 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
280 | ((x) >> 24) & 0xff | |
281 | ||
760697be | 282 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
df2ed070 GL |
283 | static int soc_camera_set_fmt(struct soc_camera_file *icf, |
284 | struct v4l2_format *f) | |
285 | { | |
286 | struct soc_camera_device *icd = icf->icd; | |
287 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
288 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
289 | int ret; | |
290 | ||
6a6c8786 GL |
291 | dev_dbg(&icd->dev, "S_FMT(%c%c%c%c, %ux%u)\n", |
292 | pixfmtstr(pix->pixelformat), pix->width, pix->height); | |
293 | ||
df2ed070 GL |
294 | /* We always call try_fmt() before set_fmt() or set_crop() */ |
295 | ret = ici->ops->try_fmt(icd, f); | |
296 | if (ret < 0) | |
297 | return ret; | |
298 | ||
299 | ret = ici->ops->set_fmt(icd, f); | |
300 | if (ret < 0) { | |
301 | return ret; | |
302 | } else if (!icd->current_fmt || | |
760697be | 303 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
2aa58db4 | 304 | dev_err(&icd->dev, |
df2ed070 GL |
305 | "Host driver hasn't set up current format correctly!\n"); |
306 | return -EINVAL; | |
307 | } | |
308 | ||
6a6c8786 GL |
309 | icd->user_width = pix->width; |
310 | icd->user_height = pix->height; | |
760697be | 311 | icd->colorspace = pix->colorspace; |
6a6c8786 GL |
312 | icf->vb_vidq.field = |
313 | icd->field = pix->field; | |
025c18a1 | 314 | |
df2ed070 GL |
315 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
316 | dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n", | |
317 | f->type); | |
318 | ||
319 | dev_dbg(&icd->dev, "set width: %d height: %d\n", | |
6a6c8786 | 320 | icd->user_width, icd->user_height); |
df2ed070 GL |
321 | |
322 | /* set physical bus parameters */ | |
323 | return ici->ops->set_bus_param(icd, pix->pixelformat); | |
324 | } | |
325 | ||
bec43661 | 326 | static int soc_camera_open(struct file *file) |
e55222ef | 327 | { |
979ea1dd | 328 | struct video_device *vdev = video_devdata(file); |
96c75399 GL |
329 | struct soc_camera_device *icd = container_of(vdev->parent, |
330 | struct soc_camera_device, | |
331 | dev); | |
979ea1dd | 332 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
9dc4e48f | 333 | struct soc_camera_host *ici; |
e55222ef GL |
334 | struct soc_camera_file *icf; |
335 | int ret; | |
336 | ||
40e2e092 GL |
337 | if (!icd->ops) |
338 | /* No device driver attached */ | |
339 | return -ENODEV; | |
340 | ||
9dc4e48f | 341 | ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 342 | |
40e2e092 GL |
343 | icf = vmalloc(sizeof(*icf)); |
344 | if (!icf) | |
345 | return -ENOMEM; | |
346 | ||
b8d9904c | 347 | if (!try_module_get(ici->ops->owner)) { |
e55222ef GL |
348 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); |
349 | ret = -EINVAL; | |
350 | goto emgi; | |
351 | } | |
352 | ||
96c75399 GL |
353 | /* |
354 | * Protect against icd->ops->remove() until we module_get() both | |
355 | * drivers. | |
356 | */ | |
1c3bb743 GL |
357 | mutex_lock(&icd->video_lock); |
358 | ||
9dc4e48f | 359 | icf->icd = icd; |
1a0063a9 GL |
360 | icd->use_count++; |
361 | ||
9dc4e48f GL |
362 | /* Now we really have to activate the camera */ |
363 | if (icd->use_count == 1) { | |
025c18a1 | 364 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
365 | struct v4l2_format f = { |
366 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
367 | .fmt.pix = { | |
6a6c8786 GL |
368 | .width = icd->user_width, |
369 | .height = icd->user_height, | |
025c18a1 | 370 | .field = icd->field, |
760697be GL |
371 | .colorspace = icd->colorspace, |
372 | .pixelformat = | |
373 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
374 | }, |
375 | }; | |
376 | ||
979ea1dd GL |
377 | if (icl->power) { |
378 | ret = icl->power(icd->pdev, 1); | |
379 | if (ret < 0) | |
380 | goto epower; | |
381 | } | |
382 | ||
383 | /* The camera could have been already on, try to reset */ | |
384 | if (icl->reset) | |
385 | icl->reset(icd->pdev); | |
386 | ||
b8d9904c | 387 | ret = ici->ops->add(icd); |
9dc4e48f GL |
388 | if (ret < 0) { |
389 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
9dc4e48f GL |
390 | goto eiciadd; |
391 | } | |
df2ed070 | 392 | |
4f9fb5ed MCC |
393 | pm_runtime_enable(&icd->vdev->dev); |
394 | ret = pm_runtime_resume(&icd->vdev->dev); | |
395 | if (ret < 0 && ret != -ENOSYS) | |
396 | goto eresume; | |
397 | ||
760697be GL |
398 | /* |
399 | * Try to configure with default parameters. Notice: this is the | |
400 | * very first open, so, we cannot race against other calls, | |
401 | * apart from someone else calling open() simultaneously, but | |
402 | * .video_lock is protecting us against it. | |
403 | */ | |
df2ed070 GL |
404 | ret = soc_camera_set_fmt(icf, &f); |
405 | if (ret < 0) | |
406 | goto esfmt; | |
9dc4e48f GL |
407 | } |
408 | ||
e55222ef GL |
409 | file->private_data = icf; |
410 | dev_dbg(&icd->dev, "camera device open\n"); | |
411 | ||
a034d1b7 | 412 | ici->ops->init_videobuf(&icf->vb_vidq, icd); |
e55222ef | 413 | |
979ea1dd GL |
414 | mutex_unlock(&icd->video_lock); |
415 | ||
e55222ef GL |
416 | return 0; |
417 | ||
df2ed070 | 418 | /* |
4f9fb5ed | 419 | * First four errors are entered with the .video_lock held |
df2ed070 GL |
420 | * and use_count == 1 |
421 | */ | |
422 | esfmt: | |
4f9fb5ed MCC |
423 | pm_runtime_disable(&icd->vdev->dev); |
424 | eresume: | |
df2ed070 | 425 | ici->ops->remove(icd); |
9dc4e48f | 426 | eiciadd: |
979ea1dd GL |
427 | if (icl->power) |
428 | icl->power(icd->pdev, 0); | |
429 | epower: | |
c2786ad2 | 430 | icd->use_count--; |
1c3bb743 | 431 | mutex_unlock(&icd->video_lock); |
b8d9904c | 432 | module_put(ici->ops->owner); |
e55222ef | 433 | emgi: |
e55222ef GL |
434 | vfree(icf); |
435 | return ret; | |
436 | } | |
437 | ||
bec43661 | 438 | static int soc_camera_close(struct file *file) |
e55222ef GL |
439 | { |
440 | struct soc_camera_file *icf = file->private_data; | |
441 | struct soc_camera_device *icd = icf->icd; | |
442 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
e55222ef | 443 | |
1c3bb743 | 444 | mutex_lock(&icd->video_lock); |
9dc4e48f | 445 | icd->use_count--; |
40e2e092 | 446 | if (!icd->use_count) { |
979ea1dd GL |
447 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
448 | ||
4f9fb5ed MCC |
449 | pm_runtime_suspend(&icd->vdev->dev); |
450 | pm_runtime_disable(&icd->vdev->dev); | |
451 | ||
b8d9904c | 452 | ici->ops->remove(icd); |
4f9fb5ed | 453 | |
979ea1dd GL |
454 | if (icl->power) |
455 | icl->power(icd->pdev, 0); | |
40e2e092 | 456 | } |
025c18a1 | 457 | |
1c3bb743 GL |
458 | mutex_unlock(&icd->video_lock); |
459 | ||
b8d9904c | 460 | module_put(ici->ops->owner); |
9dc4e48f | 461 | |
1a0063a9 | 462 | vfree(icf); |
e55222ef | 463 | |
2aa58db4 | 464 | dev_dbg(&icd->dev, "camera device close\n"); |
e55222ef GL |
465 | |
466 | return 0; | |
467 | } | |
468 | ||
aba360d8 | 469 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 470 | size_t count, loff_t *ppos) |
e55222ef GL |
471 | { |
472 | struct soc_camera_file *icf = file->private_data; | |
473 | struct soc_camera_device *icd = icf->icd; | |
e55222ef GL |
474 | int err = -EINVAL; |
475 | ||
2aa58db4 | 476 | dev_err(&icd->dev, "camera device read not implemented\n"); |
e55222ef GL |
477 | |
478 | return err; | |
479 | } | |
480 | ||
481 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
482 | { | |
483 | struct soc_camera_file *icf = file->private_data; | |
484 | struct soc_camera_device *icd = icf->icd; | |
485 | int err; | |
486 | ||
487 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
488 | ||
489 | err = videobuf_mmap_mapper(&icf->vb_vidq, vma); | |
490 | ||
491 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
492 | (unsigned long)vma->vm_start, | |
493 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
494 | err); | |
495 | ||
496 | return err; | |
497 | } | |
498 | ||
499 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
500 | { | |
501 | struct soc_camera_file *icf = file->private_data; | |
502 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 503 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
504 | |
505 | if (list_empty(&icf->vb_vidq.stream)) { | |
506 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); | |
507 | return POLLERR; | |
508 | } | |
509 | ||
b8d9904c | 510 | return ici->ops->poll(file, pt); |
e55222ef GL |
511 | } |
512 | ||
bec43661 | 513 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
514 | .owner = THIS_MODULE, |
515 | .open = soc_camera_open, | |
516 | .release = soc_camera_close, | |
517 | .ioctl = video_ioctl2, | |
518 | .read = soc_camera_read, | |
519 | .mmap = soc_camera_mmap, | |
520 | .poll = soc_camera_poll, | |
e55222ef GL |
521 | }; |
522 | ||
72937890 | 523 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 524 | struct v4l2_format *f) |
e55222ef GL |
525 | { |
526 | struct soc_camera_file *icf = file->private_data; | |
527 | struct soc_camera_device *icd = icf->icd; | |
e55222ef | 528 | int ret; |
e55222ef GL |
529 | |
530 | WARN_ON(priv != file->private_data); | |
531 | ||
1c3bb743 GL |
532 | mutex_lock(&icf->vb_vidq.vb_lock); |
533 | ||
b897a91a GL |
534 | if (icf->vb_vidq.bufs[0]) { |
535 | dev_err(&icd->dev, "S_FMT denied: queue initialised\n"); | |
1c3bb743 GL |
536 | ret = -EBUSY; |
537 | goto unlock; | |
538 | } | |
539 | ||
df2ed070 | 540 | ret = soc_camera_set_fmt(icf, f); |
1c3bb743 GL |
541 | |
542 | unlock: | |
543 | mutex_unlock(&icf->vb_vidq.vb_lock); | |
544 | ||
545 | return ret; | |
e55222ef GL |
546 | } |
547 | ||
72937890 | 548 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 549 | struct v4l2_fmtdesc *f) |
e55222ef GL |
550 | { |
551 | struct soc_camera_file *icf = file->private_data; | |
552 | struct soc_camera_device *icd = icf->icd; | |
760697be | 553 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
554 | |
555 | WARN_ON(priv != file->private_data); | |
556 | ||
c2786ad2 | 557 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
558 | return -EINVAL; |
559 | ||
c2786ad2 | 560 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 561 | |
760697be GL |
562 | if (format->name) |
563 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
564 | f->pixelformat = format->fourcc; |
565 | return 0; | |
566 | } | |
567 | ||
72937890 | 568 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 569 | struct v4l2_format *f) |
e55222ef GL |
570 | { |
571 | struct soc_camera_file *icf = file->private_data; | |
572 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 573 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
574 | |
575 | WARN_ON(priv != file->private_data); | |
576 | ||
6a6c8786 GL |
577 | pix->width = icd->user_width; |
578 | pix->height = icd->user_height; | |
64f5905e | 579 | pix->field = icf->vb_vidq.field; |
760697be GL |
580 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
581 | pix->bytesperline = soc_mbus_bytes_per_line(pix->width, | |
582 | icd->current_fmt->host_fmt); | |
583 | pix->colorspace = icd->colorspace; | |
584 | if (pix->bytesperline < 0) | |
585 | return pix->bytesperline; | |
64f5905e | 586 | pix->sizeimage = pix->height * pix->bytesperline; |
e55222ef | 587 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 588 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
589 | return 0; |
590 | } | |
591 | ||
592 | static int soc_camera_querycap(struct file *file, void *priv, | |
593 | struct v4l2_capability *cap) | |
594 | { | |
595 | struct soc_camera_file *icf = file->private_data; | |
596 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 597 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
598 | |
599 | WARN_ON(priv != file->private_data); | |
600 | ||
601 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 602 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
603 | } |
604 | ||
605 | static int soc_camera_streamon(struct file *file, void *priv, | |
606 | enum v4l2_buf_type i) | |
607 | { | |
608 | struct soc_camera_file *icf = file->private_data; | |
609 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 610 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 611 | int ret; |
e55222ef GL |
612 | |
613 | WARN_ON(priv != file->private_data); | |
614 | ||
e55222ef GL |
615 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
616 | return -EINVAL; | |
617 | ||
1c3bb743 GL |
618 | mutex_lock(&icd->video_lock); |
619 | ||
c9c1f1c0 | 620 | v4l2_subdev_call(sd, video, s_stream, 1); |
e55222ef GL |
621 | |
622 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | |
1c3bb743 GL |
623 | ret = videobuf_streamon(&icf->vb_vidq); |
624 | ||
625 | mutex_unlock(&icd->video_lock); | |
626 | ||
627 | return ret; | |
e55222ef GL |
628 | } |
629 | ||
630 | static int soc_camera_streamoff(struct file *file, void *priv, | |
631 | enum v4l2_buf_type i) | |
632 | { | |
633 | struct soc_camera_file *icf = file->private_data; | |
634 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 635 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef GL |
636 | |
637 | WARN_ON(priv != file->private_data); | |
638 | ||
e55222ef GL |
639 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
640 | return -EINVAL; | |
641 | ||
1c3bb743 GL |
642 | mutex_lock(&icd->video_lock); |
643 | ||
5d28d525 GL |
644 | /* |
645 | * This calls buf_release from host driver's videobuf_queue_ops for all | |
646 | * remaining buffers. When the last buffer is freed, stop capture | |
647 | */ | |
e55222ef GL |
648 | videobuf_streamoff(&icf->vb_vidq); |
649 | ||
c9c1f1c0 | 650 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef | 651 | |
1c3bb743 GL |
652 | mutex_unlock(&icd->video_lock); |
653 | ||
e55222ef GL |
654 | return 0; |
655 | } | |
656 | ||
657 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
658 | struct v4l2_queryctrl *qc) | |
659 | { | |
660 | struct soc_camera_file *icf = file->private_data; | |
661 | struct soc_camera_device *icd = icf->icd; | |
2840d249 | 662 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
663 | int i; |
664 | ||
665 | WARN_ON(priv != file->private_data); | |
666 | ||
667 | if (!qc->id) | |
668 | return -EINVAL; | |
669 | ||
2840d249 GL |
670 | /* First check host controls */ |
671 | for (i = 0; i < ici->ops->num_controls; i++) | |
672 | if (qc->id == ici->ops->controls[i].id) { | |
673 | memcpy(qc, &(ici->ops->controls[i]), | |
674 | sizeof(*qc)); | |
675 | return 0; | |
676 | } | |
677 | ||
678 | /* Then device controls */ | |
e55222ef GL |
679 | for (i = 0; i < icd->ops->num_controls; i++) |
680 | if (qc->id == icd->ops->controls[i].id) { | |
681 | memcpy(qc, &(icd->ops->controls[i]), | |
682 | sizeof(*qc)); | |
683 | return 0; | |
684 | } | |
685 | ||
686 | return -EINVAL; | |
687 | } | |
688 | ||
689 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
690 | struct v4l2_control *ctrl) | |
691 | { | |
692 | struct soc_camera_file *icf = file->private_data; | |
693 | struct soc_camera_device *icd = icf->icd; | |
979ea1dd | 694 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 695 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 696 | int ret; |
e55222ef GL |
697 | |
698 | WARN_ON(priv != file->private_data); | |
699 | ||
2840d249 GL |
700 | if (ici->ops->get_ctrl) { |
701 | ret = ici->ops->get_ctrl(icd, ctrl); | |
702 | if (ret != -ENOIOCTLCMD) | |
703 | return ret; | |
704 | } | |
705 | ||
c9c1f1c0 | 706 | return v4l2_subdev_call(sd, core, g_ctrl, ctrl); |
e55222ef GL |
707 | } |
708 | ||
709 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
710 | struct v4l2_control *ctrl) | |
711 | { | |
712 | struct soc_camera_file *icf = file->private_data; | |
713 | struct soc_camera_device *icd = icf->icd; | |
979ea1dd | 714 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 715 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 716 | int ret; |
e55222ef GL |
717 | |
718 | WARN_ON(priv != file->private_data); | |
719 | ||
2840d249 GL |
720 | if (ici->ops->set_ctrl) { |
721 | ret = ici->ops->set_ctrl(icd, ctrl); | |
722 | if (ret != -ENOIOCTLCMD) | |
723 | return ret; | |
724 | } | |
725 | ||
c9c1f1c0 | 726 | return v4l2_subdev_call(sd, core, s_ctrl, ctrl); |
e55222ef GL |
727 | } |
728 | ||
729 | static int soc_camera_cropcap(struct file *file, void *fh, | |
730 | struct v4l2_cropcap *a) | |
731 | { | |
732 | struct soc_camera_file *icf = file->private_data; | |
733 | struct soc_camera_device *icd = icf->icd; | |
6a6c8786 | 734 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 735 | |
6a6c8786 | 736 | return ici->ops->cropcap(icd, a); |
e55222ef GL |
737 | } |
738 | ||
739 | static int soc_camera_g_crop(struct file *file, void *fh, | |
740 | struct v4l2_crop *a) | |
741 | { | |
742 | struct soc_camera_file *icf = file->private_data; | |
743 | struct soc_camera_device *icd = icf->icd; | |
6a6c8786 GL |
744 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
745 | int ret; | |
e55222ef | 746 | |
6a6c8786 GL |
747 | mutex_lock(&icf->vb_vidq.vb_lock); |
748 | ret = ici->ops->get_crop(icd, a); | |
749 | mutex_unlock(&icf->vb_vidq.vb_lock); | |
e55222ef | 750 | |
6a6c8786 | 751 | return ret; |
e55222ef GL |
752 | } |
753 | ||
68a54f0e GL |
754 | /* |
755 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
756 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
ab56d5eb | 757 | * retrieve it. |
68a54f0e | 758 | */ |
e55222ef GL |
759 | static int soc_camera_s_crop(struct file *file, void *fh, |
760 | struct v4l2_crop *a) | |
761 | { | |
762 | struct soc_camera_file *icf = file->private_data; | |
763 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 764 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
6a6c8786 GL |
765 | struct v4l2_rect *rect = &a->c; |
766 | struct v4l2_crop current_crop; | |
e55222ef GL |
767 | int ret; |
768 | ||
769 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
770 | return -EINVAL; | |
771 | ||
6a6c8786 GL |
772 | dev_dbg(&icd->dev, "S_CROP(%ux%u@%u:%u)\n", |
773 | rect->width, rect->height, rect->left, rect->top); | |
774 | ||
1c3bb743 GL |
775 | /* Cropping is allowed during a running capture, guard consistency */ |
776 | mutex_lock(&icf->vb_vidq.vb_lock); | |
777 | ||
6a6c8786 GL |
778 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
779 | ret = ici->ops->get_crop(icd, ¤t_crop); | |
780 | ||
b897a91a | 781 | /* Prohibit window size change with initialised buffers */ |
6a6c8786 GL |
782 | if (icf->vb_vidq.bufs[0] && !ret && |
783 | (a->c.width != current_crop.c.width || | |
784 | a->c.height != current_crop.c.height)) { | |
b897a91a GL |
785 | dev_err(&icd->dev, |
786 | "S_CROP denied: queue initialised and sizes differ\n"); | |
787 | ret = -EBUSY; | |
6a6c8786 GL |
788 | } else { |
789 | ret = ici->ops->set_crop(icd, a); | |
b897a91a GL |
790 | } |
791 | ||
1c3bb743 GL |
792 | mutex_unlock(&icf->vb_vidq.vb_lock); |
793 | ||
e55222ef GL |
794 | return ret; |
795 | } | |
796 | ||
c9f6ef69 GL |
797 | static int soc_camera_g_parm(struct file *file, void *fh, |
798 | struct v4l2_streamparm *a) | |
799 | { | |
800 | struct soc_camera_file *icf = file->private_data; | |
801 | struct soc_camera_device *icd = icf->icd; | |
802 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
803 | ||
804 | if (ici->ops->get_parm) | |
805 | return ici->ops->get_parm(icd, a); | |
806 | ||
807 | return -ENOIOCTLCMD; | |
808 | } | |
809 | ||
810 | static int soc_camera_s_parm(struct file *file, void *fh, | |
811 | struct v4l2_streamparm *a) | |
812 | { | |
813 | struct soc_camera_file *icf = file->private_data; | |
814 | struct soc_camera_device *icd = icf->icd; | |
815 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
816 | ||
817 | if (ici->ops->set_parm) | |
818 | return ici->ops->set_parm(icd, a); | |
819 | ||
820 | return -ENOIOCTLCMD; | |
821 | } | |
822 | ||
e55222ef | 823 | static int soc_camera_g_chip_ident(struct file *file, void *fh, |
aecde8b5 | 824 | struct v4l2_dbg_chip_ident *id) |
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_chip_ident, id); |
e55222ef GL |
831 | } |
832 | ||
833 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
834 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 835 | struct v4l2_dbg_register *reg) |
e55222ef GL |
836 | { |
837 | struct soc_camera_file *icf = file->private_data; | |
838 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 839 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 840 | |
c9c1f1c0 | 841 | return v4l2_subdev_call(sd, core, g_register, reg); |
e55222ef GL |
842 | } |
843 | ||
844 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 845 | struct v4l2_dbg_register *reg) |
e55222ef GL |
846 | { |
847 | struct soc_camera_file *icf = file->private_data; | |
848 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 849 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 850 | |
c9c1f1c0 | 851 | return v4l2_subdev_call(sd, core, s_register, reg); |
e55222ef GL |
852 | } |
853 | #endif | |
854 | ||
e55222ef GL |
855 | /* So far this function cannot fail */ |
856 | static void scan_add_host(struct soc_camera_host *ici) | |
857 | { | |
858 | struct soc_camera_device *icd; | |
859 | ||
860 | mutex_lock(&list_lock); | |
861 | ||
862 | list_for_each_entry(icd, &devices, list) { | |
863 | if (icd->iface == ici->nr) { | |
40e2e092 | 864 | int ret; |
979ea1dd | 865 | icd->dev.parent = ici->v4l2_dev.dev; |
40e2e092 GL |
866 | dev_set_name(&icd->dev, "%u-%u", icd->iface, |
867 | icd->devnum); | |
868 | ret = device_register(&icd->dev); | |
869 | if (ret < 0) { | |
870 | icd->dev.parent = NULL; | |
871 | dev_err(&icd->dev, | |
872 | "Cannot register device: %d\n", ret); | |
873 | } | |
e55222ef GL |
874 | } |
875 | } | |
876 | ||
877 | mutex_unlock(&list_lock); | |
878 | } | |
879 | ||
40e2e092 GL |
880 | #ifdef CONFIG_I2C_BOARDINFO |
881 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | |
882 | struct soc_camera_link *icl) | |
e55222ef | 883 | { |
40e2e092 | 884 | struct i2c_client *client; |
979ea1dd | 885 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
40e2e092 | 886 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); |
979ea1dd | 887 | struct v4l2_subdev *subdev; |
e55222ef | 888 | |
40e2e092 | 889 | if (!adap) { |
40e2e092 GL |
890 | dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n", |
891 | icl->i2c_adapter_id); | |
892 | goto ei2cga; | |
893 | } | |
e55222ef | 894 | |
40e2e092 | 895 | icl->board_info->platform_data = icd; |
e55222ef | 896 | |
979ea1dd GL |
897 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
898 | icl->module_name, icl->board_info, NULL); | |
d74f841c | 899 | if (!subdev) |
40e2e092 | 900 | goto ei2cnd; |
e55222ef | 901 | |
979ea1dd GL |
902 | client = subdev->priv; |
903 | ||
40e2e092 GL |
904 | /* Use to_i2c_client(dev) to recover the i2c client */ |
905 | dev_set_drvdata(&icd->dev, &client->dev); | |
e55222ef | 906 | |
40e2e092 GL |
907 | return 0; |
908 | ei2cnd: | |
909 | i2c_put_adapter(adap); | |
910 | ei2cga: | |
d74f841c | 911 | return -ENODEV; |
e55222ef GL |
912 | } |
913 | ||
40e2e092 GL |
914 | static void soc_camera_free_i2c(struct soc_camera_device *icd) |
915 | { | |
916 | struct i2c_client *client = | |
917 | to_i2c_client(to_soc_camera_control(icd)); | |
918 | dev_set_drvdata(&icd->dev, NULL); | |
979ea1dd | 919 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 GL |
920 | i2c_unregister_device(client); |
921 | i2c_put_adapter(client->adapter); | |
922 | } | |
923 | #else | |
924 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | |
925 | #define soc_camera_free_i2c(icd) do {} while (0) | |
926 | #endif | |
927 | ||
979ea1dd | 928 | static int soc_camera_video_start(struct soc_camera_device *icd); |
40e2e092 GL |
929 | static int video_dev_create(struct soc_camera_device *icd); |
930 | /* Called during host-driver probe */ | |
e55222ef GL |
931 | static int soc_camera_probe(struct device *dev) |
932 | { | |
933 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
979ea1dd | 934 | struct soc_camera_host *ici = to_soc_camera_host(dev->parent); |
40e2e092 | 935 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
979ea1dd | 936 | struct device *control = NULL; |
6a6c8786 | 937 | struct v4l2_subdev *sd; |
760697be | 938 | struct v4l2_mbus_framefmt mf; |
e55222ef GL |
939 | int ret; |
940 | ||
40e2e092 | 941 | dev_info(dev, "Probing %s\n", dev_name(dev)); |
1c3bb743 | 942 | |
979ea1dd GL |
943 | if (icl->power) { |
944 | ret = icl->power(icd->pdev, 1); | |
945 | if (ret < 0) { | |
946 | dev_err(dev, | |
947 | "Platform failed to power-on the camera.\n"); | |
948 | goto epower; | |
949 | } | |
950 | } | |
951 | ||
952 | /* The camera could have been already on, try to reset */ | |
953 | if (icl->reset) | |
954 | icl->reset(icd->pdev); | |
955 | ||
956 | ret = ici->ops->add(icd); | |
957 | if (ret < 0) | |
958 | goto eadd; | |
959 | ||
960 | /* Must have icd->vdev before registering the device */ | |
40e2e092 GL |
961 | ret = video_dev_create(icd); |
962 | if (ret < 0) | |
963 | goto evdc; | |
1c3bb743 | 964 | |
40e2e092 GL |
965 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
966 | if (icl->board_info) { | |
967 | ret = soc_camera_init_i2c(icd, icl); | |
968 | if (ret < 0) | |
969 | goto eadddev; | |
970 | } else if (!icl->add_device || !icl->del_device) { | |
1c3bb743 | 971 | ret = -EINVAL; |
40e2e092 GL |
972 | goto eadddev; |
973 | } else { | |
979ea1dd GL |
974 | if (icl->module_name) |
975 | ret = request_module(icl->module_name); | |
976 | ||
40e2e092 GL |
977 | ret = icl->add_device(icl, &icd->dev); |
978 | if (ret < 0) | |
979 | goto eadddev; | |
1c3bb743 | 980 | |
96c75399 GL |
981 | /* |
982 | * FIXME: this is racy, have to use driver-binding notification, | |
983 | * when it is available | |
984 | */ | |
979ea1dd | 985 | control = to_soc_camera_control(icd); |
08590b96 | 986 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd GL |
987 | !try_module_get(control->driver->owner)) { |
988 | icl->del_device(icl); | |
989 | goto enodrv; | |
990 | } | |
40e2e092 | 991 | } |
e55222ef | 992 | |
fa48984e GL |
993 | /* At this point client .probe() should have run already */ |
994 | ret = soc_camera_init_user_formats(icd); | |
995 | if (ret < 0) | |
996 | goto eiufmt; | |
997 | ||
fa48984e GL |
998 | icd->field = V4L2_FIELD_ANY; |
999 | ||
979ea1dd GL |
1000 | /* ..._video_start() will create a device node, so we have to protect */ |
1001 | mutex_lock(&icd->video_lock); | |
1002 | ||
1003 | ret = soc_camera_video_start(icd); | |
1004 | if (ret < 0) | |
1005 | goto evidstart; | |
1006 | ||
6a6c8786 GL |
1007 | /* Try to improve our guess of a reasonable window format */ |
1008 | sd = soc_camera_to_subdev(icd); | |
760697be GL |
1009 | if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { |
1010 | icd->user_width = mf.width; | |
1011 | icd->user_height = mf.height; | |
1012 | icd->colorspace = mf.colorspace; | |
1013 | icd->field = mf.field; | |
6a6c8786 GL |
1014 | } |
1015 | ||
40e2e092 | 1016 | /* Do we have to sysfs_remove_link() before device_unregister()? */ |
6a6c8786 | 1017 | if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj, |
40e2e092 GL |
1018 | "control")) |
1019 | dev_warn(&icd->dev, "Failed creating the control symlink\n"); | |
025c18a1 | 1020 | |
979ea1dd GL |
1021 | ici->ops->remove(icd); |
1022 | ||
1023 | if (icl->power) | |
1024 | icl->power(icd->pdev, 0); | |
1025 | ||
1026 | mutex_unlock(&icd->video_lock); | |
025c18a1 | 1027 | |
40e2e092 | 1028 | return 0; |
e55222ef | 1029 | |
979ea1dd GL |
1030 | evidstart: |
1031 | mutex_unlock(&icd->video_lock); | |
fa48984e GL |
1032 | soc_camera_free_user_formats(icd); |
1033 | eiufmt: | |
979ea1dd | 1034 | if (icl->board_info) { |
40e2e092 | 1035 | soc_camera_free_i2c(icd); |
979ea1dd | 1036 | } else { |
40e2e092 | 1037 | icl->del_device(icl); |
979ea1dd GL |
1038 | module_put(control->driver->owner); |
1039 | } | |
1040 | enodrv: | |
40e2e092 GL |
1041 | eadddev: |
1042 | video_device_release(icd->vdev); | |
1043 | evdc: | |
979ea1dd GL |
1044 | ici->ops->remove(icd); |
1045 | eadd: | |
1046 | if (icl->power) | |
1047 | icl->power(icd->pdev, 0); | |
1048 | epower: | |
e55222ef GL |
1049 | return ret; |
1050 | } | |
1051 | ||
5d28d525 GL |
1052 | /* |
1053 | * This is called on device_unregister, which only means we have to disconnect | |
1054 | * from the host, but not remove ourselves from the device list | |
1055 | */ | |
e55222ef GL |
1056 | static int soc_camera_remove(struct device *dev) |
1057 | { | |
1058 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
40e2e092 GL |
1059 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
1060 | struct video_device *vdev = icd->vdev; | |
e55222ef | 1061 | |
40e2e092 | 1062 | BUG_ON(!dev->parent); |
e55222ef | 1063 | |
40e2e092 GL |
1064 | if (vdev) { |
1065 | mutex_lock(&icd->video_lock); | |
1066 | video_unregister_device(vdev); | |
1067 | icd->vdev = NULL; | |
1068 | mutex_unlock(&icd->video_lock); | |
1069 | } | |
1070 | ||
979ea1dd | 1071 | if (icl->board_info) { |
40e2e092 | 1072 | soc_camera_free_i2c(icd); |
979ea1dd GL |
1073 | } else { |
1074 | struct device_driver *drv = to_soc_camera_control(icd) ? | |
1075 | to_soc_camera_control(icd)->driver : NULL; | |
1076 | if (drv) { | |
1077 | icl->del_device(icl); | |
1078 | module_put(drv->owner); | |
1079 | } | |
1080 | } | |
fa48984e | 1081 | soc_camera_free_user_formats(icd); |
025c18a1 | 1082 | |
e55222ef GL |
1083 | return 0; |
1084 | } | |
1085 | ||
2e521061 RJ |
1086 | static int soc_camera_suspend(struct device *dev, pm_message_t state) |
1087 | { | |
1088 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1089 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1090 | int ret = 0; | |
1091 | ||
1092 | if (ici->ops->suspend) | |
1093 | ret = ici->ops->suspend(icd, state); | |
1094 | ||
1095 | return ret; | |
1096 | } | |
1097 | ||
1098 | static int soc_camera_resume(struct device *dev) | |
1099 | { | |
1100 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1101 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1102 | int ret = 0; | |
1103 | ||
1104 | if (ici->ops->resume) | |
1105 | ret = ici->ops->resume(icd); | |
1106 | ||
1107 | return ret; | |
1108 | } | |
1109 | ||
e55222ef GL |
1110 | static struct bus_type soc_camera_bus_type = { |
1111 | .name = "soc-camera", | |
1112 | .probe = soc_camera_probe, | |
1113 | .remove = soc_camera_remove, | |
2e521061 RJ |
1114 | .suspend = soc_camera_suspend, |
1115 | .resume = soc_camera_resume, | |
e55222ef GL |
1116 | }; |
1117 | ||
1118 | static struct device_driver ic_drv = { | |
1119 | .name = "camera", | |
1120 | .bus = &soc_camera_bus_type, | |
1121 | .owner = THIS_MODULE, | |
1122 | }; | |
1123 | ||
e55222ef GL |
1124 | static void dummy_release(struct device *dev) |
1125 | { | |
1126 | } | |
1127 | ||
6a6c8786 GL |
1128 | static int default_cropcap(struct soc_camera_device *icd, |
1129 | struct v4l2_cropcap *a) | |
1130 | { | |
1131 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1132 | return v4l2_subdev_call(sd, video, cropcap, a); | |
1133 | } | |
1134 | ||
1135 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1136 | { | |
1137 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1138 | return v4l2_subdev_call(sd, video, g_crop, a); | |
1139 | } | |
1140 | ||
1141 | static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1142 | { | |
1143 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1144 | return v4l2_subdev_call(sd, video, s_crop, a); | |
1145 | } | |
1146 | ||
64ff9ba5 GL |
1147 | static void soc_camera_device_init(struct device *dev, void *pdata) |
1148 | { | |
1149 | dev->platform_data = pdata; | |
1150 | dev->bus = &soc_camera_bus_type; | |
1151 | dev->release = dummy_release; | |
1152 | } | |
1153 | ||
b8d9904c | 1154 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1155 | { |
e55222ef | 1156 | struct soc_camera_host *ix; |
979ea1dd | 1157 | int ret; |
e55222ef | 1158 | |
64f5905e GL |
1159 | if (!ici || !ici->ops || |
1160 | !ici->ops->try_fmt || | |
1161 | !ici->ops->set_fmt || | |
1162 | !ici->ops->set_bus_param || | |
1163 | !ici->ops->querycap || | |
1164 | !ici->ops->init_videobuf || | |
1165 | !ici->ops->reqbufs || | |
1166 | !ici->ops->add || | |
1167 | !ici->ops->remove || | |
eff505fa | 1168 | !ici->ops->poll || |
979ea1dd | 1169 | !ici->v4l2_dev.dev) |
e55222ef GL |
1170 | return -EINVAL; |
1171 | ||
6a6c8786 GL |
1172 | if (!ici->ops->set_crop) |
1173 | ici->ops->set_crop = default_s_crop; | |
1174 | if (!ici->ops->get_crop) | |
1175 | ici->ops->get_crop = default_g_crop; | |
1176 | if (!ici->ops->cropcap) | |
1177 | ici->ops->cropcap = default_cropcap; | |
1178 | ||
e55222ef GL |
1179 | mutex_lock(&list_lock); |
1180 | list_for_each_entry(ix, &hosts, list) { | |
1181 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1182 | ret = -EBUSY; |
1183 | goto edevreg; | |
e55222ef GL |
1184 | } |
1185 | } | |
1186 | ||
979ea1dd GL |
1187 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1188 | if (ret < 0) | |
1189 | goto edevreg; | |
eff505fa | 1190 | |
e55222ef GL |
1191 | list_add_tail(&ici->list, &hosts); |
1192 | mutex_unlock(&list_lock); | |
1193 | ||
e55222ef GL |
1194 | scan_add_host(ici); |
1195 | ||
1196 | return 0; | |
979ea1dd GL |
1197 | |
1198 | edevreg: | |
1199 | mutex_unlock(&list_lock); | |
1200 | return ret; | |
e55222ef GL |
1201 | } |
1202 | EXPORT_SYMBOL(soc_camera_host_register); | |
1203 | ||
1204 | /* Unregister all clients! */ | |
1205 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1206 | { | |
1207 | struct soc_camera_device *icd; | |
1208 | ||
1209 | mutex_lock(&list_lock); | |
1210 | ||
1211 | list_del(&ici->list); | |
1212 | ||
1213 | list_for_each_entry(icd, &devices, list) { | |
979ea1dd | 1214 | if (icd->iface == ici->nr) { |
64ff9ba5 | 1215 | void *pdata = icd->dev.platform_data; |
40e2e092 | 1216 | /* The bus->remove will be called */ |
e55222ef | 1217 | device_unregister(&icd->dev); |
76823b79 GL |
1218 | /* |
1219 | * Not before device_unregister(), .remove | |
1220 | * needs parent to call ici->ops->remove(). | |
1221 | * If the host module is loaded again, device_register() | |
1222 | * would complain "already initialised," since 2.6.32 | |
1223 | * this is also needed to prevent use-after-free of the | |
1224 | * device private data. | |
1225 | */ | |
1226 | memset(&icd->dev, 0, sizeof(icd->dev)); | |
64ff9ba5 | 1227 | soc_camera_device_init(&icd->dev, pdata); |
e55222ef GL |
1228 | } |
1229 | } | |
1230 | ||
1231 | mutex_unlock(&list_lock); | |
1232 | ||
979ea1dd | 1233 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1234 | } |
1235 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1236 | ||
1237 | /* Image capture device */ | |
40e2e092 | 1238 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1239 | { |
1240 | struct soc_camera_device *ix; | |
1241 | int num = -1, i; | |
1242 | ||
e55222ef GL |
1243 | for (i = 0; i < 256 && num < 0; i++) { |
1244 | num = i; | |
40e2e092 | 1245 | /* Check if this index is available on this interface */ |
e55222ef GL |
1246 | list_for_each_entry(ix, &devices, list) { |
1247 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1248 | num = -1; | |
1249 | break; | |
1250 | } | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | if (num < 0) | |
5d28d525 GL |
1255 | /* |
1256 | * ok, we have 256 cameras on this host... | |
1257 | * man, stay reasonable... | |
1258 | */ | |
e55222ef GL |
1259 | return -ENOMEM; |
1260 | ||
64ff9ba5 | 1261 | icd->devnum = num; |
64f5905e GL |
1262 | icd->use_count = 0; |
1263 | icd->host_priv = NULL; | |
1c3bb743 | 1264 | mutex_init(&icd->video_lock); |
e55222ef | 1265 | |
40e2e092 GL |
1266 | list_add_tail(&icd->list, &devices); |
1267 | ||
1268 | return 0; | |
e55222ef | 1269 | } |
e55222ef | 1270 | |
40e2e092 | 1271 | static void soc_camera_device_unregister(struct soc_camera_device *icd) |
e55222ef | 1272 | { |
e55222ef | 1273 | list_del(&icd->list); |
e55222ef | 1274 | } |
e55222ef | 1275 | |
a399810c HV |
1276 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1277 | .vidioc_querycap = soc_camera_querycap, | |
1278 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | |
1279 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | |
1280 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | |
1281 | .vidioc_enum_input = soc_camera_enum_input, | |
1282 | .vidioc_g_input = soc_camera_g_input, | |
1283 | .vidioc_s_input = soc_camera_s_input, | |
1284 | .vidioc_s_std = soc_camera_s_std, | |
1285 | .vidioc_reqbufs = soc_camera_reqbufs, | |
1286 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | |
1287 | .vidioc_querybuf = soc_camera_querybuf, | |
1288 | .vidioc_qbuf = soc_camera_qbuf, | |
1289 | .vidioc_dqbuf = soc_camera_dqbuf, | |
1290 | .vidioc_streamon = soc_camera_streamon, | |
1291 | .vidioc_streamoff = soc_camera_streamoff, | |
1292 | .vidioc_queryctrl = soc_camera_queryctrl, | |
1293 | .vidioc_g_ctrl = soc_camera_g_ctrl, | |
1294 | .vidioc_s_ctrl = soc_camera_s_ctrl, | |
1295 | .vidioc_cropcap = soc_camera_cropcap, | |
1296 | .vidioc_g_crop = soc_camera_g_crop, | |
1297 | .vidioc_s_crop = soc_camera_s_crop, | |
c9f6ef69 GL |
1298 | .vidioc_g_parm = soc_camera_g_parm, |
1299 | .vidioc_s_parm = soc_camera_s_parm, | |
a399810c HV |
1300 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, |
1301 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1302 | .vidioc_g_register = soc_camera_g_register, | |
1303 | .vidioc_s_register = soc_camera_s_register, | |
1304 | #endif | |
1305 | }; | |
1306 | ||
40e2e092 | 1307 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef GL |
1308 | { |
1309 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
40e2e092 | 1310 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 1311 | |
e55222ef | 1312 | if (!vdev) |
40e2e092 | 1313 | return -ENOMEM; |
e55222ef GL |
1314 | |
1315 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1316 | |
5e85e732 | 1317 | vdev->parent = &icd->dev; |
e55222ef GL |
1318 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1319 | vdev->fops = &soc_camera_fops; | |
a399810c | 1320 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 1321 | vdev->release = video_device_release; |
40e2e092 | 1322 | vdev->tvnorms = V4L2_STD_UNKNOWN; |
e55222ef | 1323 | |
e55222ef GL |
1324 | icd->vdev = vdev; |
1325 | ||
1326 | return 0; | |
40e2e092 | 1327 | } |
e55222ef | 1328 | |
40e2e092 | 1329 | /* |
979ea1dd | 1330 | * Called from soc_camera_probe() above (with .video_lock held???) |
40e2e092 | 1331 | */ |
979ea1dd | 1332 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 1333 | { |
4f9fb5ed | 1334 | struct device_type *type = icd->vdev->dev.type; |
979ea1dd | 1335 | int ret; |
40e2e092 GL |
1336 | |
1337 | if (!icd->dev.parent) | |
1338 | return -ENODEV; | |
1339 | ||
1340 | if (!icd->ops || | |
40e2e092 GL |
1341 | !icd->ops->query_bus_param || |
1342 | !icd->ops->set_bus_param) | |
1343 | return -EINVAL; | |
1344 | ||
46b21094 | 1345 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd GL |
1346 | if (ret < 0) { |
1347 | dev_err(&icd->dev, "video_register_device failed: %d\n", ret); | |
1348 | return ret; | |
1349 | } | |
40e2e092 | 1350 | |
4f9fb5ed MCC |
1351 | /* Restore device type, possibly set by the subdevice driver */ |
1352 | icd->vdev->dev.type = type; | |
1353 | ||
979ea1dd | 1354 | return 0; |
e55222ef | 1355 | } |
e55222ef | 1356 | |
40e2e092 | 1357 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 1358 | { |
40e2e092 GL |
1359 | struct soc_camera_link *icl = pdev->dev.platform_data; |
1360 | struct soc_camera_device *icd; | |
c41debaf | 1361 | int ret; |
0fd327bd | 1362 | |
40e2e092 GL |
1363 | if (!icl) |
1364 | return -EINVAL; | |
0fd327bd | 1365 | |
40e2e092 GL |
1366 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); |
1367 | if (!icd) | |
1368 | return -ENOMEM; | |
0fd327bd | 1369 | |
40e2e092 | 1370 | icd->iface = icl->bus_id; |
979ea1dd | 1371 | icd->pdev = &pdev->dev; |
40e2e092 | 1372 | platform_set_drvdata(pdev, icd); |
0fd327bd | 1373 | |
40e2e092 GL |
1374 | ret = soc_camera_device_register(icd); |
1375 | if (ret < 0) | |
1376 | goto escdevreg; | |
0fd327bd | 1377 | |
64ff9ba5 GL |
1378 | soc_camera_device_init(&icd->dev, icl); |
1379 | ||
6a6c8786 GL |
1380 | icd->user_width = DEFAULT_WIDTH; |
1381 | icd->user_height = DEFAULT_HEIGHT; | |
1382 | ||
40e2e092 | 1383 | return 0; |
0fd327bd | 1384 | |
40e2e092 GL |
1385 | escdevreg: |
1386 | kfree(icd); | |
0fd327bd | 1387 | |
40e2e092 | 1388 | return ret; |
c41debaf | 1389 | } |
0fd327bd | 1390 | |
5d28d525 GL |
1391 | /* |
1392 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 1393 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
1394 | * been unloaded already |
1395 | */ | |
40e2e092 | 1396 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 1397 | { |
40e2e092 | 1398 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
c41debaf | 1399 | |
40e2e092 | 1400 | if (!icd) |
c41debaf GL |
1401 | return -EINVAL; |
1402 | ||
40e2e092 | 1403 | soc_camera_device_unregister(icd); |
c41debaf | 1404 | |
40e2e092 | 1405 | kfree(icd); |
c41debaf | 1406 | |
0fd327bd GL |
1407 | return 0; |
1408 | } | |
1409 | ||
1410 | static struct platform_driver __refdata soc_camera_pdrv = { | |
40e2e092 GL |
1411 | .remove = __devexit_p(soc_camera_pdrv_remove), |
1412 | .driver = { | |
1413 | .name = "soc-camera-pdrv", | |
1414 | .owner = THIS_MODULE, | |
0fd327bd GL |
1415 | }, |
1416 | }; | |
1417 | ||
e55222ef GL |
1418 | static int __init soc_camera_init(void) |
1419 | { | |
1420 | int ret = bus_register(&soc_camera_bus_type); | |
1421 | if (ret) | |
1422 | return ret; | |
1423 | ret = driver_register(&ic_drv); | |
1424 | if (ret) | |
1425 | goto edrvr; | |
e55222ef | 1426 | |
40e2e092 | 1427 | ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
0fd327bd GL |
1428 | if (ret) |
1429 | goto epdr; | |
1430 | ||
e55222ef GL |
1431 | return 0; |
1432 | ||
0fd327bd GL |
1433 | epdr: |
1434 | driver_unregister(&ic_drv); | |
e55222ef GL |
1435 | edrvr: |
1436 | bus_unregister(&soc_camera_bus_type); | |
1437 | return ret; | |
1438 | } | |
1439 | ||
1440 | static void __exit soc_camera_exit(void) | |
1441 | { | |
0fd327bd | 1442 | platform_driver_unregister(&soc_camera_pdrv); |
e55222ef GL |
1443 | driver_unregister(&ic_drv); |
1444 | bus_unregister(&soc_camera_bus_type); | |
1445 | } | |
1446 | ||
1447 | module_init(soc_camera_init); | |
1448 | module_exit(soc_camera_exit); | |
1449 | ||
1450 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1451 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1452 | MODULE_LICENSE("GPL"); | |
0fd327bd | 1453 | MODULE_ALIAS("platform:soc-camera-pdrv"); |