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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 | 94 | { |
57bee29d | 95 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 96 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
97 | |
98 | WARN_ON(priv != file->private_data); | |
99 | ||
ad5f2e85 | 100 | /* limit format to hardware capabilities */ |
06daa1af | 101 | return ici->ops->try_fmt(icd, f); |
e55222ef GL |
102 | } |
103 | ||
104 | static int soc_camera_enum_input(struct file *file, void *priv, | |
105 | struct v4l2_input *inp) | |
106 | { | |
57bee29d | 107 | struct soc_camera_device *icd = file->private_data; |
34d359db KM |
108 | int ret = 0; |
109 | ||
e55222ef GL |
110 | if (inp->index != 0) |
111 | return -EINVAL; | |
112 | ||
34d359db KM |
113 | if (icd->ops->enum_input) |
114 | ret = icd->ops->enum_input(icd, inp); | |
115 | else { | |
116 | /* default is camera */ | |
117 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
118 | inp->std = V4L2_STD_UNKNOWN; | |
119 | strcpy(inp->name, "Camera"); | |
120 | } | |
e55222ef | 121 | |
34d359db | 122 | return ret; |
e55222ef GL |
123 | } |
124 | ||
125 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
126 | { | |
127 | *i = 0; | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
133 | { | |
134 | if (i > 0) | |
135 | return -EINVAL; | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | |
141 | { | |
57bee29d | 142 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 143 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 144 | |
c9c1f1c0 | 145 | return v4l2_subdev_call(sd, core, s_std, *a); |
e55222ef GL |
146 | } |
147 | ||
148 | static int soc_camera_reqbufs(struct file *file, void *priv, | |
149 | struct v4l2_requestbuffers *p) | |
150 | { | |
151 | int ret; | |
57bee29d | 152 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 153 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
154 | |
155 | WARN_ON(priv != file->private_data); | |
156 | ||
57bee29d GL |
157 | if (icd->streamer && icd->streamer != file) |
158 | return -EBUSY; | |
159 | ||
160 | ret = videobuf_reqbufs(&icd->vb_vidq, p); | |
e55222ef GL |
161 | if (ret < 0) |
162 | return ret; | |
163 | ||
57bee29d GL |
164 | ret = ici->ops->reqbufs(icd, p); |
165 | if (!ret && !icd->streamer) | |
166 | icd->streamer = file; | |
167 | ||
168 | return ret; | |
e55222ef GL |
169 | } |
170 | ||
171 | static int soc_camera_querybuf(struct file *file, void *priv, | |
172 | struct v4l2_buffer *p) | |
173 | { | |
57bee29d | 174 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
175 | |
176 | WARN_ON(priv != file->private_data); | |
177 | ||
57bee29d | 178 | return videobuf_querybuf(&icd->vb_vidq, p); |
e55222ef GL |
179 | } |
180 | ||
181 | static int soc_camera_qbuf(struct file *file, void *priv, | |
182 | struct v4l2_buffer *p) | |
183 | { | |
57bee29d | 184 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
185 | |
186 | WARN_ON(priv != file->private_data); | |
187 | ||
57bee29d GL |
188 | if (icd->streamer != file) |
189 | return -EBUSY; | |
190 | ||
191 | return videobuf_qbuf(&icd->vb_vidq, p); | |
e55222ef GL |
192 | } |
193 | ||
194 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
195 | struct v4l2_buffer *p) | |
196 | { | |
57bee29d | 197 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
198 | |
199 | WARN_ON(priv != file->private_data); | |
200 | ||
57bee29d GL |
201 | if (icd->streamer != file) |
202 | return -EBUSY; | |
203 | ||
204 | return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
e55222ef GL |
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 | { | |
760697be | 210 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
c2786ad2 | 211 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
3805f201 HV |
212 | unsigned int i, fmts = 0, raw_fmts = 0; |
213 | int ret; | |
760697be GL |
214 | enum v4l2_mbus_pixelcode code; |
215 | ||
216 | while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) | |
217 | raw_fmts++; | |
c2786ad2 GL |
218 | |
219 | if (!ici->ops->get_formats) | |
220 | /* | |
221 | * Fallback mode - the host will have to serve all | |
222 | * sensor-provided formats one-to-one to the user | |
223 | */ | |
760697be | 224 | fmts = raw_fmts; |
c2786ad2 GL |
225 | else |
226 | /* | |
227 | * First pass - only count formats this host-sensor | |
228 | * configuration can provide | |
229 | */ | |
760697be | 230 | for (i = 0; i < raw_fmts; i++) { |
fa48984e GL |
231 | ret = ici->ops->get_formats(icd, i, NULL); |
232 | if (ret < 0) | |
233 | return ret; | |
234 | fmts += ret; | |
235 | } | |
c2786ad2 GL |
236 | |
237 | if (!fmts) | |
238 | return -ENXIO; | |
239 | ||
240 | icd->user_formats = | |
241 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
242 | if (!icd->user_formats) | |
243 | return -ENOMEM; | |
244 | ||
245 | icd->num_user_formats = fmts; | |
c2786ad2 GL |
246 | |
247 | dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts); | |
248 | ||
249 | /* Second pass - actually fill data formats */ | |
14df2cce | 250 | fmts = 0; |
760697be | 251 | for (i = 0; i < raw_fmts; i++) |
c2786ad2 | 252 | if (!ici->ops->get_formats) { |
760697be GL |
253 | v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); |
254 | icd->user_formats[i].host_fmt = | |
255 | soc_mbus_get_fmtdesc(code); | |
256 | icd->user_formats[i].code = code; | |
c2786ad2 | 257 | } else { |
fa48984e GL |
258 | ret = ici->ops->get_formats(icd, i, |
259 | &icd->user_formats[fmts]); | |
260 | if (ret < 0) | |
261 | goto egfmt; | |
262 | fmts += ret; | |
c2786ad2 GL |
263 | } |
264 | ||
760697be | 265 | icd->current_fmt = &icd->user_formats[0]; |
c2786ad2 GL |
266 | |
267 | return 0; | |
fa48984e GL |
268 | |
269 | egfmt: | |
270 | icd->num_user_formats = 0; | |
271 | vfree(icd->user_formats); | |
272 | return ret; | |
c2786ad2 GL |
273 | } |
274 | ||
40e2e092 | 275 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
276 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
277 | { | |
fa48984e GL |
278 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
279 | ||
280 | if (ici->ops->put_formats) | |
281 | ici->ops->put_formats(icd); | |
40e2e092 | 282 | icd->current_fmt = NULL; |
fa48984e | 283 | icd->num_user_formats = 0; |
c2786ad2 | 284 | vfree(icd->user_formats); |
40e2e092 | 285 | icd->user_formats = NULL; |
c2786ad2 GL |
286 | } |
287 | ||
6a6c8786 GL |
288 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
289 | ((x) >> 24) & 0xff | |
290 | ||
760697be | 291 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
57bee29d | 292 | static int soc_camera_set_fmt(struct soc_camera_device *icd, |
df2ed070 GL |
293 | struct v4l2_format *f) |
294 | { | |
df2ed070 GL |
295 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
296 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
297 | int ret; | |
298 | ||
6a6c8786 GL |
299 | dev_dbg(&icd->dev, "S_FMT(%c%c%c%c, %ux%u)\n", |
300 | pixfmtstr(pix->pixelformat), pix->width, pix->height); | |
301 | ||
df2ed070 GL |
302 | /* We always call try_fmt() before set_fmt() or set_crop() */ |
303 | ret = ici->ops->try_fmt(icd, f); | |
304 | if (ret < 0) | |
305 | return ret; | |
306 | ||
307 | ret = ici->ops->set_fmt(icd, f); | |
308 | if (ret < 0) { | |
309 | return ret; | |
310 | } else if (!icd->current_fmt || | |
760697be | 311 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
2aa58db4 | 312 | dev_err(&icd->dev, |
df2ed070 GL |
313 | "Host driver hasn't set up current format correctly!\n"); |
314 | return -EINVAL; | |
315 | } | |
316 | ||
6a6c8786 GL |
317 | icd->user_width = pix->width; |
318 | icd->user_height = pix->height; | |
760697be | 319 | icd->colorspace = pix->colorspace; |
57bee29d | 320 | icd->vb_vidq.field = |
6a6c8786 | 321 | icd->field = pix->field; |
025c18a1 | 322 | |
df2ed070 GL |
323 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
324 | dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n", | |
325 | f->type); | |
326 | ||
327 | dev_dbg(&icd->dev, "set width: %d height: %d\n", | |
6a6c8786 | 328 | icd->user_width, icd->user_height); |
df2ed070 GL |
329 | |
330 | /* set physical bus parameters */ | |
331 | return ici->ops->set_bus_param(icd, pix->pixelformat); | |
332 | } | |
333 | ||
bec43661 | 334 | static int soc_camera_open(struct file *file) |
e55222ef | 335 | { |
979ea1dd | 336 | struct video_device *vdev = video_devdata(file); |
96c75399 GL |
337 | struct soc_camera_device *icd = container_of(vdev->parent, |
338 | struct soc_camera_device, | |
339 | dev); | |
979ea1dd | 340 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
9dc4e48f | 341 | struct soc_camera_host *ici; |
e55222ef GL |
342 | int ret; |
343 | ||
40e2e092 GL |
344 | if (!icd->ops) |
345 | /* No device driver attached */ | |
346 | return -ENODEV; | |
347 | ||
9dc4e48f | 348 | ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 349 | |
b8d9904c | 350 | if (!try_module_get(ici->ops->owner)) { |
e55222ef | 351 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); |
57bee29d | 352 | return -EINVAL; |
e55222ef GL |
353 | } |
354 | ||
96c75399 GL |
355 | /* |
356 | * Protect against icd->ops->remove() until we module_get() both | |
357 | * drivers. | |
358 | */ | |
1c3bb743 GL |
359 | mutex_lock(&icd->video_lock); |
360 | ||
1a0063a9 GL |
361 | icd->use_count++; |
362 | ||
9dc4e48f GL |
363 | /* Now we really have to activate the camera */ |
364 | if (icd->use_count == 1) { | |
025c18a1 | 365 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
366 | struct v4l2_format f = { |
367 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
368 | .fmt.pix = { | |
6a6c8786 GL |
369 | .width = icd->user_width, |
370 | .height = icd->user_height, | |
025c18a1 | 371 | .field = icd->field, |
760697be GL |
372 | .colorspace = icd->colorspace, |
373 | .pixelformat = | |
374 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
375 | }, |
376 | }; | |
377 | ||
979ea1dd GL |
378 | if (icl->power) { |
379 | ret = icl->power(icd->pdev, 1); | |
380 | if (ret < 0) | |
381 | goto epower; | |
382 | } | |
383 | ||
384 | /* The camera could have been already on, try to reset */ | |
385 | if (icl->reset) | |
386 | icl->reset(icd->pdev); | |
387 | ||
b8d9904c | 388 | ret = ici->ops->add(icd); |
9dc4e48f GL |
389 | if (ret < 0) { |
390 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
9dc4e48f GL |
391 | goto eiciadd; |
392 | } | |
df2ed070 | 393 | |
4f9fb5ed MCC |
394 | pm_runtime_enable(&icd->vdev->dev); |
395 | ret = pm_runtime_resume(&icd->vdev->dev); | |
396 | if (ret < 0 && ret != -ENOSYS) | |
397 | goto eresume; | |
398 | ||
760697be GL |
399 | /* |
400 | * Try to configure with default parameters. Notice: this is the | |
401 | * very first open, so, we cannot race against other calls, | |
402 | * apart from someone else calling open() simultaneously, but | |
403 | * .video_lock is protecting us against it. | |
404 | */ | |
57bee29d | 405 | ret = soc_camera_set_fmt(icd, &f); |
df2ed070 GL |
406 | if (ret < 0) |
407 | goto esfmt; | |
9dc4e48f GL |
408 | } |
409 | ||
57bee29d | 410 | file->private_data = icd; |
e55222ef GL |
411 | dev_dbg(&icd->dev, "camera device open\n"); |
412 | ||
57bee29d | 413 | ici->ops->init_videobuf(&icd->vb_vidq, icd); |
e55222ef | 414 | |
979ea1dd GL |
415 | mutex_unlock(&icd->video_lock); |
416 | ||
e55222ef GL |
417 | return 0; |
418 | ||
df2ed070 | 419 | /* |
4f9fb5ed | 420 | * First four errors are entered with the .video_lock held |
df2ed070 GL |
421 | * and use_count == 1 |
422 | */ | |
423 | esfmt: | |
4f9fb5ed MCC |
424 | pm_runtime_disable(&icd->vdev->dev); |
425 | eresume: | |
df2ed070 | 426 | ici->ops->remove(icd); |
9dc4e48f | 427 | eiciadd: |
979ea1dd GL |
428 | if (icl->power) |
429 | icl->power(icd->pdev, 0); | |
430 | epower: | |
c2786ad2 | 431 | icd->use_count--; |
1c3bb743 | 432 | mutex_unlock(&icd->video_lock); |
b8d9904c | 433 | module_put(ici->ops->owner); |
57bee29d | 434 | |
e55222ef GL |
435 | return ret; |
436 | } | |
437 | ||
bec43661 | 438 | static int soc_camera_close(struct file *file) |
e55222ef | 439 | { |
57bee29d | 440 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 441 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 442 | |
1c3bb743 | 443 | mutex_lock(&icd->video_lock); |
9dc4e48f | 444 | icd->use_count--; |
40e2e092 | 445 | if (!icd->use_count) { |
979ea1dd GL |
446 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
447 | ||
4f9fb5ed MCC |
448 | pm_runtime_suspend(&icd->vdev->dev); |
449 | pm_runtime_disable(&icd->vdev->dev); | |
450 | ||
b8d9904c | 451 | ici->ops->remove(icd); |
4f9fb5ed | 452 | |
979ea1dd GL |
453 | if (icl->power) |
454 | icl->power(icd->pdev, 0); | |
40e2e092 | 455 | } |
025c18a1 | 456 | |
57bee29d GL |
457 | if (icd->streamer == file) |
458 | icd->streamer = NULL; | |
459 | ||
1c3bb743 GL |
460 | mutex_unlock(&icd->video_lock); |
461 | ||
b8d9904c | 462 | module_put(ici->ops->owner); |
9dc4e48f | 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 | 471 | { |
57bee29d | 472 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
473 | int err = -EINVAL; |
474 | ||
2aa58db4 | 475 | dev_err(&icd->dev, "camera device read not implemented\n"); |
e55222ef GL |
476 | |
477 | return err; | |
478 | } | |
479 | ||
480 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
481 | { | |
57bee29d | 482 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
483 | int err; |
484 | ||
485 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
486 | ||
57bee29d GL |
487 | if (icd->streamer != file) |
488 | return -EBUSY; | |
489 | ||
490 | err = videobuf_mmap_mapper(&icd->vb_vidq, vma); | |
e55222ef GL |
491 | |
492 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
493 | (unsigned long)vma->vm_start, | |
494 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
495 | err); | |
496 | ||
497 | return err; | |
498 | } | |
499 | ||
500 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
501 | { | |
57bee29d | 502 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 503 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 504 | |
57bee29d GL |
505 | if (icd->streamer != file) |
506 | return -EBUSY; | |
507 | ||
508 | if (list_empty(&icd->vb_vidq.stream)) { | |
e55222ef GL |
509 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); |
510 | return POLLERR; | |
511 | } | |
512 | ||
b8d9904c | 513 | return ici->ops->poll(file, pt); |
e55222ef GL |
514 | } |
515 | ||
bec43661 | 516 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
517 | .owner = THIS_MODULE, |
518 | .open = soc_camera_open, | |
519 | .release = soc_camera_close, | |
520 | .ioctl = video_ioctl2, | |
521 | .read = soc_camera_read, | |
522 | .mmap = soc_camera_mmap, | |
523 | .poll = soc_camera_poll, | |
e55222ef GL |
524 | }; |
525 | ||
72937890 | 526 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 527 | struct v4l2_format *f) |
e55222ef | 528 | { |
57bee29d | 529 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 530 | int ret; |
e55222ef GL |
531 | |
532 | WARN_ON(priv != file->private_data); | |
533 | ||
57bee29d GL |
534 | if (icd->streamer && icd->streamer != file) |
535 | return -EBUSY; | |
1c3bb743 | 536 | |
57bee29d GL |
537 | mutex_lock(&icd->vb_vidq.vb_lock); |
538 | ||
539 | if (icd->vb_vidq.bufs[0]) { | |
b897a91a | 540 | dev_err(&icd->dev, "S_FMT denied: queue initialised\n"); |
1c3bb743 GL |
541 | ret = -EBUSY; |
542 | goto unlock; | |
543 | } | |
544 | ||
57bee29d GL |
545 | ret = soc_camera_set_fmt(icd, f); |
546 | ||
547 | if (!ret && !icd->streamer) | |
548 | icd->streamer = file; | |
1c3bb743 GL |
549 | |
550 | unlock: | |
57bee29d | 551 | mutex_unlock(&icd->vb_vidq.vb_lock); |
1c3bb743 GL |
552 | |
553 | return ret; | |
e55222ef GL |
554 | } |
555 | ||
72937890 | 556 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 557 | struct v4l2_fmtdesc *f) |
e55222ef | 558 | { |
57bee29d | 559 | struct soc_camera_device *icd = file->private_data; |
760697be | 560 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
561 | |
562 | WARN_ON(priv != file->private_data); | |
563 | ||
c2786ad2 | 564 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
565 | return -EINVAL; |
566 | ||
c2786ad2 | 567 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 568 | |
760697be GL |
569 | if (format->name) |
570 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
571 | f->pixelformat = format->fourcc; |
572 | return 0; | |
573 | } | |
574 | ||
72937890 | 575 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 576 | struct v4l2_format *f) |
e55222ef | 577 | { |
57bee29d | 578 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 579 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
580 | |
581 | WARN_ON(priv != file->private_data); | |
582 | ||
6a6c8786 GL |
583 | pix->width = icd->user_width; |
584 | pix->height = icd->user_height; | |
57bee29d | 585 | pix->field = icd->vb_vidq.field; |
760697be GL |
586 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
587 | pix->bytesperline = soc_mbus_bytes_per_line(pix->width, | |
588 | icd->current_fmt->host_fmt); | |
589 | pix->colorspace = icd->colorspace; | |
590 | if (pix->bytesperline < 0) | |
591 | return pix->bytesperline; | |
64f5905e | 592 | pix->sizeimage = pix->height * pix->bytesperline; |
e55222ef | 593 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 594 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
595 | return 0; |
596 | } | |
597 | ||
598 | static int soc_camera_querycap(struct file *file, void *priv, | |
599 | struct v4l2_capability *cap) | |
600 | { | |
57bee29d | 601 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 602 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
603 | |
604 | WARN_ON(priv != file->private_data); | |
605 | ||
606 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 607 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
608 | } |
609 | ||
610 | static int soc_camera_streamon(struct file *file, void *priv, | |
611 | enum v4l2_buf_type i) | |
612 | { | |
57bee29d | 613 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 614 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 615 | int ret; |
e55222ef GL |
616 | |
617 | WARN_ON(priv != file->private_data); | |
618 | ||
e55222ef GL |
619 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
620 | return -EINVAL; | |
621 | ||
57bee29d GL |
622 | if (icd->streamer != file) |
623 | return -EBUSY; | |
624 | ||
1c3bb743 GL |
625 | mutex_lock(&icd->video_lock); |
626 | ||
c9c1f1c0 | 627 | v4l2_subdev_call(sd, video, s_stream, 1); |
e55222ef GL |
628 | |
629 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | |
57bee29d | 630 | ret = videobuf_streamon(&icd->vb_vidq); |
1c3bb743 GL |
631 | |
632 | mutex_unlock(&icd->video_lock); | |
633 | ||
634 | return ret; | |
e55222ef GL |
635 | } |
636 | ||
637 | static int soc_camera_streamoff(struct file *file, void *priv, | |
638 | enum v4l2_buf_type i) | |
639 | { | |
57bee29d | 640 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 641 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef GL |
642 | |
643 | WARN_ON(priv != file->private_data); | |
644 | ||
e55222ef GL |
645 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
646 | return -EINVAL; | |
647 | ||
57bee29d GL |
648 | if (icd->streamer != file) |
649 | return -EBUSY; | |
650 | ||
1c3bb743 GL |
651 | mutex_lock(&icd->video_lock); |
652 | ||
5d28d525 GL |
653 | /* |
654 | * This calls buf_release from host driver's videobuf_queue_ops for all | |
655 | * remaining buffers. When the last buffer is freed, stop capture | |
656 | */ | |
57bee29d | 657 | videobuf_streamoff(&icd->vb_vidq); |
e55222ef | 658 | |
c9c1f1c0 | 659 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef | 660 | |
1c3bb743 GL |
661 | mutex_unlock(&icd->video_lock); |
662 | ||
e55222ef GL |
663 | return 0; |
664 | } | |
665 | ||
666 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
667 | struct v4l2_queryctrl *qc) | |
668 | { | |
57bee29d | 669 | struct soc_camera_device *icd = file->private_data; |
2840d249 | 670 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
671 | int i; |
672 | ||
673 | WARN_ON(priv != file->private_data); | |
674 | ||
675 | if (!qc->id) | |
676 | return -EINVAL; | |
677 | ||
2840d249 GL |
678 | /* First check host controls */ |
679 | for (i = 0; i < ici->ops->num_controls; i++) | |
680 | if (qc->id == ici->ops->controls[i].id) { | |
681 | memcpy(qc, &(ici->ops->controls[i]), | |
682 | sizeof(*qc)); | |
683 | return 0; | |
684 | } | |
685 | ||
686 | /* Then device controls */ | |
e55222ef GL |
687 | for (i = 0; i < icd->ops->num_controls; i++) |
688 | if (qc->id == icd->ops->controls[i].id) { | |
689 | memcpy(qc, &(icd->ops->controls[i]), | |
690 | sizeof(*qc)); | |
691 | return 0; | |
692 | } | |
693 | ||
694 | return -EINVAL; | |
695 | } | |
696 | ||
697 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
698 | struct v4l2_control *ctrl) | |
699 | { | |
57bee29d | 700 | struct soc_camera_device *icd = file->private_data; |
979ea1dd | 701 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 702 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 703 | int ret; |
e55222ef GL |
704 | |
705 | WARN_ON(priv != file->private_data); | |
706 | ||
2840d249 GL |
707 | if (ici->ops->get_ctrl) { |
708 | ret = ici->ops->get_ctrl(icd, ctrl); | |
709 | if (ret != -ENOIOCTLCMD) | |
710 | return ret; | |
711 | } | |
712 | ||
c9c1f1c0 | 713 | return v4l2_subdev_call(sd, core, g_ctrl, ctrl); |
e55222ef GL |
714 | } |
715 | ||
716 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
717 | struct v4l2_control *ctrl) | |
718 | { | |
57bee29d | 719 | struct soc_camera_device *icd = file->private_data; |
979ea1dd | 720 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 721 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 722 | int ret; |
e55222ef GL |
723 | |
724 | WARN_ON(priv != file->private_data); | |
725 | ||
2840d249 GL |
726 | if (ici->ops->set_ctrl) { |
727 | ret = ici->ops->set_ctrl(icd, ctrl); | |
728 | if (ret != -ENOIOCTLCMD) | |
729 | return ret; | |
730 | } | |
731 | ||
c9c1f1c0 | 732 | return v4l2_subdev_call(sd, core, s_ctrl, ctrl); |
e55222ef GL |
733 | } |
734 | ||
735 | static int soc_camera_cropcap(struct file *file, void *fh, | |
736 | struct v4l2_cropcap *a) | |
737 | { | |
57bee29d | 738 | struct soc_camera_device *icd = file->private_data; |
6a6c8786 | 739 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 740 | |
6a6c8786 | 741 | return ici->ops->cropcap(icd, a); |
e55222ef GL |
742 | } |
743 | ||
744 | static int soc_camera_g_crop(struct file *file, void *fh, | |
745 | struct v4l2_crop *a) | |
746 | { | |
57bee29d | 747 | struct soc_camera_device *icd = file->private_data; |
6a6c8786 GL |
748 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
749 | int ret; | |
e55222ef | 750 | |
57bee29d | 751 | mutex_lock(&icd->vb_vidq.vb_lock); |
6a6c8786 | 752 | ret = ici->ops->get_crop(icd, a); |
57bee29d | 753 | mutex_unlock(&icd->vb_vidq.vb_lock); |
e55222ef | 754 | |
6a6c8786 | 755 | return ret; |
e55222ef GL |
756 | } |
757 | ||
68a54f0e GL |
758 | /* |
759 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
760 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
ab56d5eb | 761 | * retrieve it. |
68a54f0e | 762 | */ |
e55222ef GL |
763 | static int soc_camera_s_crop(struct file *file, void *fh, |
764 | struct v4l2_crop *a) | |
765 | { | |
57bee29d | 766 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 767 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
6a6c8786 GL |
768 | struct v4l2_rect *rect = &a->c; |
769 | struct v4l2_crop current_crop; | |
e55222ef GL |
770 | int ret; |
771 | ||
772 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
773 | return -EINVAL; | |
774 | ||
6a6c8786 GL |
775 | dev_dbg(&icd->dev, "S_CROP(%ux%u@%u:%u)\n", |
776 | rect->width, rect->height, rect->left, rect->top); | |
777 | ||
1c3bb743 | 778 | /* Cropping is allowed during a running capture, guard consistency */ |
57bee29d | 779 | mutex_lock(&icd->vb_vidq.vb_lock); |
1c3bb743 | 780 | |
6a6c8786 GL |
781 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
782 | ret = ici->ops->get_crop(icd, ¤t_crop); | |
783 | ||
b897a91a | 784 | /* Prohibit window size change with initialised buffers */ |
103754a0 GL |
785 | if (ret < 0) { |
786 | dev_err(&icd->dev, | |
787 | "S_CROP denied: getting current crop failed\n"); | |
57bee29d | 788 | } else if (icd->vb_vidq.bufs[0] && |
103754a0 GL |
789 | (a->c.width != current_crop.c.width || |
790 | a->c.height != current_crop.c.height)) { | |
b897a91a GL |
791 | dev_err(&icd->dev, |
792 | "S_CROP denied: queue initialised and sizes differ\n"); | |
793 | ret = -EBUSY; | |
6a6c8786 GL |
794 | } else { |
795 | ret = ici->ops->set_crop(icd, a); | |
b897a91a GL |
796 | } |
797 | ||
57bee29d | 798 | mutex_unlock(&icd->vb_vidq.vb_lock); |
1c3bb743 | 799 | |
e55222ef GL |
800 | return ret; |
801 | } | |
802 | ||
c9f6ef69 GL |
803 | static int soc_camera_g_parm(struct file *file, void *fh, |
804 | struct v4l2_streamparm *a) | |
805 | { | |
57bee29d | 806 | struct soc_camera_device *icd = file->private_data; |
c9f6ef69 GL |
807 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
808 | ||
809 | if (ici->ops->get_parm) | |
810 | return ici->ops->get_parm(icd, a); | |
811 | ||
812 | return -ENOIOCTLCMD; | |
813 | } | |
814 | ||
815 | static int soc_camera_s_parm(struct file *file, void *fh, | |
816 | struct v4l2_streamparm *a) | |
817 | { | |
57bee29d | 818 | struct soc_camera_device *icd = file->private_data; |
c9f6ef69 GL |
819 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
820 | ||
821 | if (ici->ops->set_parm) | |
822 | return ici->ops->set_parm(icd, a); | |
823 | ||
824 | return -ENOIOCTLCMD; | |
825 | } | |
826 | ||
e55222ef | 827 | static int soc_camera_g_chip_ident(struct file *file, void *fh, |
aecde8b5 | 828 | struct v4l2_dbg_chip_ident *id) |
e55222ef | 829 | { |
57bee29d | 830 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 831 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 832 | |
c9c1f1c0 | 833 | return v4l2_subdev_call(sd, core, g_chip_ident, id); |
e55222ef GL |
834 | } |
835 | ||
836 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
837 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 838 | struct v4l2_dbg_register *reg) |
e55222ef | 839 | { |
57bee29d | 840 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 841 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 842 | |
c9c1f1c0 | 843 | return v4l2_subdev_call(sd, core, g_register, reg); |
e55222ef GL |
844 | } |
845 | ||
846 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 847 | struct v4l2_dbg_register *reg) |
e55222ef | 848 | { |
57bee29d | 849 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 850 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 851 | |
c9c1f1c0 | 852 | return v4l2_subdev_call(sd, core, s_register, reg); |
e55222ef GL |
853 | } |
854 | #endif | |
855 | ||
e55222ef GL |
856 | /* So far this function cannot fail */ |
857 | static void scan_add_host(struct soc_camera_host *ici) | |
858 | { | |
859 | struct soc_camera_device *icd; | |
860 | ||
861 | mutex_lock(&list_lock); | |
862 | ||
863 | list_for_each_entry(icd, &devices, list) { | |
864 | if (icd->iface == ici->nr) { | |
40e2e092 | 865 | int ret; |
979ea1dd | 866 | icd->dev.parent = ici->v4l2_dev.dev; |
40e2e092 GL |
867 | dev_set_name(&icd->dev, "%u-%u", icd->iface, |
868 | icd->devnum); | |
869 | ret = device_register(&icd->dev); | |
870 | if (ret < 0) { | |
871 | icd->dev.parent = NULL; | |
872 | dev_err(&icd->dev, | |
873 | "Cannot register device: %d\n", ret); | |
874 | } | |
e55222ef GL |
875 | } |
876 | } | |
877 | ||
878 | mutex_unlock(&list_lock); | |
879 | } | |
880 | ||
40e2e092 GL |
881 | #ifdef CONFIG_I2C_BOARDINFO |
882 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | |
883 | struct soc_camera_link *icl) | |
e55222ef | 884 | { |
40e2e092 | 885 | struct i2c_client *client; |
979ea1dd | 886 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
40e2e092 | 887 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); |
979ea1dd | 888 | struct v4l2_subdev *subdev; |
e55222ef | 889 | |
40e2e092 | 890 | if (!adap) { |
40e2e092 GL |
891 | dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n", |
892 | icl->i2c_adapter_id); | |
893 | goto ei2cga; | |
894 | } | |
e55222ef | 895 | |
40e2e092 | 896 | icl->board_info->platform_data = icd; |
e55222ef | 897 | |
979ea1dd | 898 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
9a1f8b34 | 899 | icl->board_info, NULL); |
d74f841c | 900 | if (!subdev) |
40e2e092 | 901 | goto ei2cnd; |
e55222ef | 902 | |
c4ce6d14 | 903 | client = v4l2_get_subdevdata(subdev); |
979ea1dd | 904 | |
40e2e092 GL |
905 | /* Use to_i2c_client(dev) to recover the i2c client */ |
906 | dev_set_drvdata(&icd->dev, &client->dev); | |
e55222ef | 907 | |
40e2e092 GL |
908 | return 0; |
909 | ei2cnd: | |
910 | i2c_put_adapter(adap); | |
911 | ei2cga: | |
d74f841c | 912 | return -ENODEV; |
e55222ef GL |
913 | } |
914 | ||
40e2e092 GL |
915 | static void soc_camera_free_i2c(struct soc_camera_device *icd) |
916 | { | |
917 | struct i2c_client *client = | |
918 | to_i2c_client(to_soc_camera_control(icd)); | |
919 | dev_set_drvdata(&icd->dev, NULL); | |
979ea1dd | 920 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 GL |
921 | i2c_unregister_device(client); |
922 | i2c_put_adapter(client->adapter); | |
923 | } | |
924 | #else | |
925 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | |
926 | #define soc_camera_free_i2c(icd) do {} while (0) | |
927 | #endif | |
928 | ||
979ea1dd | 929 | static int soc_camera_video_start(struct soc_camera_device *icd); |
40e2e092 GL |
930 | static int video_dev_create(struct soc_camera_device *icd); |
931 | /* Called during host-driver probe */ | |
e55222ef GL |
932 | static int soc_camera_probe(struct device *dev) |
933 | { | |
934 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
979ea1dd | 935 | struct soc_camera_host *ici = to_soc_camera_host(dev->parent); |
40e2e092 | 936 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
979ea1dd | 937 | struct device *control = NULL; |
6a6c8786 | 938 | struct v4l2_subdev *sd; |
760697be | 939 | struct v4l2_mbus_framefmt mf; |
e55222ef GL |
940 | int ret; |
941 | ||
40e2e092 | 942 | dev_info(dev, "Probing %s\n", dev_name(dev)); |
1c3bb743 | 943 | |
979ea1dd GL |
944 | if (icl->power) { |
945 | ret = icl->power(icd->pdev, 1); | |
946 | if (ret < 0) { | |
947 | dev_err(dev, | |
948 | "Platform failed to power-on the camera.\n"); | |
949 | goto epower; | |
950 | } | |
951 | } | |
952 | ||
953 | /* The camera could have been already on, try to reset */ | |
954 | if (icl->reset) | |
955 | icl->reset(icd->pdev); | |
956 | ||
957 | ret = ici->ops->add(icd); | |
958 | if (ret < 0) | |
959 | goto eadd; | |
960 | ||
961 | /* Must have icd->vdev before registering the device */ | |
40e2e092 GL |
962 | ret = video_dev_create(icd); |
963 | if (ret < 0) | |
964 | goto evdc; | |
1c3bb743 | 965 | |
40e2e092 GL |
966 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
967 | if (icl->board_info) { | |
968 | ret = soc_camera_init_i2c(icd, icl); | |
969 | if (ret < 0) | |
970 | goto eadddev; | |
971 | } else if (!icl->add_device || !icl->del_device) { | |
1c3bb743 | 972 | ret = -EINVAL; |
40e2e092 GL |
973 | goto eadddev; |
974 | } else { | |
979ea1dd GL |
975 | if (icl->module_name) |
976 | ret = request_module(icl->module_name); | |
977 | ||
40e2e092 GL |
978 | ret = icl->add_device(icl, &icd->dev); |
979 | if (ret < 0) | |
980 | goto eadddev; | |
1c3bb743 | 981 | |
96c75399 GL |
982 | /* |
983 | * FIXME: this is racy, have to use driver-binding notification, | |
984 | * when it is available | |
985 | */ | |
979ea1dd | 986 | control = to_soc_camera_control(icd); |
08590b96 | 987 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd GL |
988 | !try_module_get(control->driver->owner)) { |
989 | icl->del_device(icl); | |
990 | goto enodrv; | |
991 | } | |
40e2e092 | 992 | } |
e55222ef | 993 | |
fa48984e GL |
994 | /* At this point client .probe() should have run already */ |
995 | ret = soc_camera_init_user_formats(icd); | |
996 | if (ret < 0) | |
997 | goto eiufmt; | |
998 | ||
fa48984e GL |
999 | icd->field = V4L2_FIELD_ANY; |
1000 | ||
979ea1dd GL |
1001 | /* ..._video_start() will create a device node, so we have to protect */ |
1002 | mutex_lock(&icd->video_lock); | |
1003 | ||
1004 | ret = soc_camera_video_start(icd); | |
1005 | if (ret < 0) | |
1006 | goto evidstart; | |
1007 | ||
6a6c8786 GL |
1008 | /* Try to improve our guess of a reasonable window format */ |
1009 | sd = soc_camera_to_subdev(icd); | |
760697be GL |
1010 | if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { |
1011 | icd->user_width = mf.width; | |
1012 | icd->user_height = mf.height; | |
1013 | icd->colorspace = mf.colorspace; | |
1014 | icd->field = mf.field; | |
6a6c8786 GL |
1015 | } |
1016 | ||
40e2e092 | 1017 | /* Do we have to sysfs_remove_link() before device_unregister()? */ |
6a6c8786 | 1018 | if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj, |
40e2e092 GL |
1019 | "control")) |
1020 | dev_warn(&icd->dev, "Failed creating the control symlink\n"); | |
025c18a1 | 1021 | |
979ea1dd GL |
1022 | ici->ops->remove(icd); |
1023 | ||
1024 | if (icl->power) | |
1025 | icl->power(icd->pdev, 0); | |
1026 | ||
1027 | mutex_unlock(&icd->video_lock); | |
025c18a1 | 1028 | |
40e2e092 | 1029 | return 0; |
e55222ef | 1030 | |
979ea1dd GL |
1031 | evidstart: |
1032 | mutex_unlock(&icd->video_lock); | |
fa48984e GL |
1033 | soc_camera_free_user_formats(icd); |
1034 | eiufmt: | |
979ea1dd | 1035 | if (icl->board_info) { |
40e2e092 | 1036 | soc_camera_free_i2c(icd); |
979ea1dd | 1037 | } else { |
40e2e092 | 1038 | icl->del_device(icl); |
979ea1dd GL |
1039 | module_put(control->driver->owner); |
1040 | } | |
1041 | enodrv: | |
40e2e092 GL |
1042 | eadddev: |
1043 | video_device_release(icd->vdev); | |
1044 | evdc: | |
979ea1dd GL |
1045 | ici->ops->remove(icd); |
1046 | eadd: | |
1047 | if (icl->power) | |
1048 | icl->power(icd->pdev, 0); | |
1049 | epower: | |
e55222ef GL |
1050 | return ret; |
1051 | } | |
1052 | ||
5d28d525 GL |
1053 | /* |
1054 | * This is called on device_unregister, which only means we have to disconnect | |
1055 | * from the host, but not remove ourselves from the device list | |
1056 | */ | |
e55222ef GL |
1057 | static int soc_camera_remove(struct device *dev) |
1058 | { | |
1059 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
40e2e092 GL |
1060 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
1061 | struct video_device *vdev = icd->vdev; | |
e55222ef | 1062 | |
40e2e092 | 1063 | BUG_ON(!dev->parent); |
e55222ef | 1064 | |
40e2e092 GL |
1065 | if (vdev) { |
1066 | mutex_lock(&icd->video_lock); | |
1067 | video_unregister_device(vdev); | |
1068 | icd->vdev = NULL; | |
1069 | mutex_unlock(&icd->video_lock); | |
1070 | } | |
1071 | ||
979ea1dd | 1072 | if (icl->board_info) { |
40e2e092 | 1073 | soc_camera_free_i2c(icd); |
979ea1dd GL |
1074 | } else { |
1075 | struct device_driver *drv = to_soc_camera_control(icd) ? | |
1076 | to_soc_camera_control(icd)->driver : NULL; | |
1077 | if (drv) { | |
1078 | icl->del_device(icl); | |
1079 | module_put(drv->owner); | |
1080 | } | |
1081 | } | |
fa48984e | 1082 | soc_camera_free_user_formats(icd); |
025c18a1 | 1083 | |
e55222ef GL |
1084 | return 0; |
1085 | } | |
1086 | ||
2e521061 RJ |
1087 | static int soc_camera_suspend(struct device *dev, pm_message_t state) |
1088 | { | |
1089 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1090 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1091 | int ret = 0; | |
1092 | ||
1093 | if (ici->ops->suspend) | |
1094 | ret = ici->ops->suspend(icd, state); | |
1095 | ||
1096 | return ret; | |
1097 | } | |
1098 | ||
1099 | static int soc_camera_resume(struct device *dev) | |
1100 | { | |
1101 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1102 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1103 | int ret = 0; | |
1104 | ||
1105 | if (ici->ops->resume) | |
1106 | ret = ici->ops->resume(icd); | |
1107 | ||
1108 | return ret; | |
1109 | } | |
1110 | ||
52d268a3 | 1111 | struct bus_type soc_camera_bus_type = { |
e55222ef GL |
1112 | .name = "soc-camera", |
1113 | .probe = soc_camera_probe, | |
1114 | .remove = soc_camera_remove, | |
2e521061 RJ |
1115 | .suspend = soc_camera_suspend, |
1116 | .resume = soc_camera_resume, | |
e55222ef | 1117 | }; |
52d268a3 | 1118 | EXPORT_SYMBOL_GPL(soc_camera_bus_type); |
e55222ef GL |
1119 | |
1120 | static struct device_driver ic_drv = { | |
1121 | .name = "camera", | |
1122 | .bus = &soc_camera_bus_type, | |
1123 | .owner = THIS_MODULE, | |
1124 | }; | |
1125 | ||
e55222ef GL |
1126 | static void dummy_release(struct device *dev) |
1127 | { | |
1128 | } | |
1129 | ||
6a6c8786 GL |
1130 | static int default_cropcap(struct soc_camera_device *icd, |
1131 | struct v4l2_cropcap *a) | |
1132 | { | |
1133 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1134 | return v4l2_subdev_call(sd, video, cropcap, a); | |
1135 | } | |
1136 | ||
1137 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1138 | { | |
1139 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1140 | return v4l2_subdev_call(sd, video, g_crop, a); | |
1141 | } | |
1142 | ||
1143 | static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1144 | { | |
1145 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1146 | return v4l2_subdev_call(sd, video, s_crop, a); | |
1147 | } | |
1148 | ||
06e17821 JK |
1149 | static int default_g_parm(struct soc_camera_device *icd, |
1150 | struct v4l2_streamparm *parm) | |
1151 | { | |
1152 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1153 | return v4l2_subdev_call(sd, video, g_parm, parm); | |
1154 | } | |
1155 | ||
1156 | static int default_s_parm(struct soc_camera_device *icd, | |
1157 | struct v4l2_streamparm *parm) | |
1158 | { | |
1159 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1160 | return v4l2_subdev_call(sd, video, s_parm, parm); | |
1161 | } | |
1162 | ||
64ff9ba5 GL |
1163 | static void soc_camera_device_init(struct device *dev, void *pdata) |
1164 | { | |
1165 | dev->platform_data = pdata; | |
1166 | dev->bus = &soc_camera_bus_type; | |
1167 | dev->release = dummy_release; | |
1168 | } | |
1169 | ||
b8d9904c | 1170 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1171 | { |
e55222ef | 1172 | struct soc_camera_host *ix; |
979ea1dd | 1173 | int ret; |
e55222ef | 1174 | |
64f5905e GL |
1175 | if (!ici || !ici->ops || |
1176 | !ici->ops->try_fmt || | |
1177 | !ici->ops->set_fmt || | |
1178 | !ici->ops->set_bus_param || | |
1179 | !ici->ops->querycap || | |
1180 | !ici->ops->init_videobuf || | |
1181 | !ici->ops->reqbufs || | |
1182 | !ici->ops->add || | |
1183 | !ici->ops->remove || | |
eff505fa | 1184 | !ici->ops->poll || |
979ea1dd | 1185 | !ici->v4l2_dev.dev) |
e55222ef GL |
1186 | return -EINVAL; |
1187 | ||
6a6c8786 GL |
1188 | if (!ici->ops->set_crop) |
1189 | ici->ops->set_crop = default_s_crop; | |
1190 | if (!ici->ops->get_crop) | |
1191 | ici->ops->get_crop = default_g_crop; | |
1192 | if (!ici->ops->cropcap) | |
1193 | ici->ops->cropcap = default_cropcap; | |
06e17821 JK |
1194 | if (!ici->ops->set_parm) |
1195 | ici->ops->set_parm = default_s_parm; | |
1196 | if (!ici->ops->get_parm) | |
1197 | ici->ops->get_parm = default_g_parm; | |
6a6c8786 | 1198 | |
e55222ef GL |
1199 | mutex_lock(&list_lock); |
1200 | list_for_each_entry(ix, &hosts, list) { | |
1201 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1202 | ret = -EBUSY; |
1203 | goto edevreg; | |
e55222ef GL |
1204 | } |
1205 | } | |
1206 | ||
979ea1dd GL |
1207 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1208 | if (ret < 0) | |
1209 | goto edevreg; | |
eff505fa | 1210 | |
e55222ef GL |
1211 | list_add_tail(&ici->list, &hosts); |
1212 | mutex_unlock(&list_lock); | |
1213 | ||
e55222ef GL |
1214 | scan_add_host(ici); |
1215 | ||
1216 | return 0; | |
979ea1dd GL |
1217 | |
1218 | edevreg: | |
1219 | mutex_unlock(&list_lock); | |
1220 | return ret; | |
e55222ef GL |
1221 | } |
1222 | EXPORT_SYMBOL(soc_camera_host_register); | |
1223 | ||
1224 | /* Unregister all clients! */ | |
1225 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1226 | { | |
1227 | struct soc_camera_device *icd; | |
1228 | ||
1229 | mutex_lock(&list_lock); | |
1230 | ||
1231 | list_del(&ici->list); | |
1232 | ||
1233 | list_for_each_entry(icd, &devices, list) { | |
979ea1dd | 1234 | if (icd->iface == ici->nr) { |
64ff9ba5 | 1235 | void *pdata = icd->dev.platform_data; |
40e2e092 | 1236 | /* The bus->remove will be called */ |
e55222ef | 1237 | device_unregister(&icd->dev); |
76823b79 GL |
1238 | /* |
1239 | * Not before device_unregister(), .remove | |
1240 | * needs parent to call ici->ops->remove(). | |
1241 | * If the host module is loaded again, device_register() | |
1242 | * would complain "already initialised," since 2.6.32 | |
1243 | * this is also needed to prevent use-after-free of the | |
1244 | * device private data. | |
1245 | */ | |
1246 | memset(&icd->dev, 0, sizeof(icd->dev)); | |
64ff9ba5 | 1247 | soc_camera_device_init(&icd->dev, pdata); |
e55222ef GL |
1248 | } |
1249 | } | |
1250 | ||
1251 | mutex_unlock(&list_lock); | |
1252 | ||
979ea1dd | 1253 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1254 | } |
1255 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1256 | ||
1257 | /* Image capture device */ | |
40e2e092 | 1258 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1259 | { |
1260 | struct soc_camera_device *ix; | |
1261 | int num = -1, i; | |
1262 | ||
e55222ef GL |
1263 | for (i = 0; i < 256 && num < 0; i++) { |
1264 | num = i; | |
40e2e092 | 1265 | /* Check if this index is available on this interface */ |
e55222ef GL |
1266 | list_for_each_entry(ix, &devices, list) { |
1267 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1268 | num = -1; | |
1269 | break; | |
1270 | } | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | if (num < 0) | |
5d28d525 GL |
1275 | /* |
1276 | * ok, we have 256 cameras on this host... | |
1277 | * man, stay reasonable... | |
1278 | */ | |
e55222ef GL |
1279 | return -ENOMEM; |
1280 | ||
64ff9ba5 | 1281 | icd->devnum = num; |
64f5905e GL |
1282 | icd->use_count = 0; |
1283 | icd->host_priv = NULL; | |
1c3bb743 | 1284 | mutex_init(&icd->video_lock); |
e55222ef | 1285 | |
40e2e092 GL |
1286 | list_add_tail(&icd->list, &devices); |
1287 | ||
1288 | return 0; | |
e55222ef | 1289 | } |
e55222ef | 1290 | |
40e2e092 | 1291 | static void soc_camera_device_unregister(struct soc_camera_device *icd) |
e55222ef | 1292 | { |
e55222ef | 1293 | list_del(&icd->list); |
e55222ef | 1294 | } |
e55222ef | 1295 | |
a399810c HV |
1296 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1297 | .vidioc_querycap = soc_camera_querycap, | |
1298 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | |
1299 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | |
1300 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | |
1301 | .vidioc_enum_input = soc_camera_enum_input, | |
1302 | .vidioc_g_input = soc_camera_g_input, | |
1303 | .vidioc_s_input = soc_camera_s_input, | |
1304 | .vidioc_s_std = soc_camera_s_std, | |
1305 | .vidioc_reqbufs = soc_camera_reqbufs, | |
1306 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | |
1307 | .vidioc_querybuf = soc_camera_querybuf, | |
1308 | .vidioc_qbuf = soc_camera_qbuf, | |
1309 | .vidioc_dqbuf = soc_camera_dqbuf, | |
1310 | .vidioc_streamon = soc_camera_streamon, | |
1311 | .vidioc_streamoff = soc_camera_streamoff, | |
1312 | .vidioc_queryctrl = soc_camera_queryctrl, | |
1313 | .vidioc_g_ctrl = soc_camera_g_ctrl, | |
1314 | .vidioc_s_ctrl = soc_camera_s_ctrl, | |
1315 | .vidioc_cropcap = soc_camera_cropcap, | |
1316 | .vidioc_g_crop = soc_camera_g_crop, | |
1317 | .vidioc_s_crop = soc_camera_s_crop, | |
c9f6ef69 GL |
1318 | .vidioc_g_parm = soc_camera_g_parm, |
1319 | .vidioc_s_parm = soc_camera_s_parm, | |
a399810c HV |
1320 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, |
1321 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1322 | .vidioc_g_register = soc_camera_g_register, | |
1323 | .vidioc_s_register = soc_camera_s_register, | |
1324 | #endif | |
1325 | }; | |
1326 | ||
40e2e092 | 1327 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef GL |
1328 | { |
1329 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
40e2e092 | 1330 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 1331 | |
e55222ef | 1332 | if (!vdev) |
40e2e092 | 1333 | return -ENOMEM; |
e55222ef GL |
1334 | |
1335 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1336 | |
5e85e732 | 1337 | vdev->parent = &icd->dev; |
e55222ef GL |
1338 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1339 | vdev->fops = &soc_camera_fops; | |
a399810c | 1340 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 1341 | vdev->release = video_device_release; |
40e2e092 | 1342 | vdev->tvnorms = V4L2_STD_UNKNOWN; |
e55222ef | 1343 | |
e55222ef GL |
1344 | icd->vdev = vdev; |
1345 | ||
1346 | return 0; | |
40e2e092 | 1347 | } |
e55222ef | 1348 | |
40e2e092 | 1349 | /* |
979ea1dd | 1350 | * Called from soc_camera_probe() above (with .video_lock held???) |
40e2e092 | 1351 | */ |
979ea1dd | 1352 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 1353 | { |
4f9fb5ed | 1354 | struct device_type *type = icd->vdev->dev.type; |
979ea1dd | 1355 | int ret; |
40e2e092 GL |
1356 | |
1357 | if (!icd->dev.parent) | |
1358 | return -ENODEV; | |
1359 | ||
1360 | if (!icd->ops || | |
40e2e092 GL |
1361 | !icd->ops->query_bus_param || |
1362 | !icd->ops->set_bus_param) | |
1363 | return -EINVAL; | |
1364 | ||
46b21094 | 1365 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd GL |
1366 | if (ret < 0) { |
1367 | dev_err(&icd->dev, "video_register_device failed: %d\n", ret); | |
1368 | return ret; | |
1369 | } | |
40e2e092 | 1370 | |
4f9fb5ed MCC |
1371 | /* Restore device type, possibly set by the subdevice driver */ |
1372 | icd->vdev->dev.type = type; | |
1373 | ||
979ea1dd | 1374 | return 0; |
e55222ef | 1375 | } |
e55222ef | 1376 | |
40e2e092 | 1377 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 1378 | { |
40e2e092 GL |
1379 | struct soc_camera_link *icl = pdev->dev.platform_data; |
1380 | struct soc_camera_device *icd; | |
c41debaf | 1381 | int ret; |
0fd327bd | 1382 | |
40e2e092 GL |
1383 | if (!icl) |
1384 | return -EINVAL; | |
0fd327bd | 1385 | |
40e2e092 GL |
1386 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); |
1387 | if (!icd) | |
1388 | return -ENOMEM; | |
0fd327bd | 1389 | |
40e2e092 | 1390 | icd->iface = icl->bus_id; |
979ea1dd | 1391 | icd->pdev = &pdev->dev; |
40e2e092 | 1392 | platform_set_drvdata(pdev, icd); |
0fd327bd | 1393 | |
40e2e092 GL |
1394 | ret = soc_camera_device_register(icd); |
1395 | if (ret < 0) | |
1396 | goto escdevreg; | |
0fd327bd | 1397 | |
64ff9ba5 GL |
1398 | soc_camera_device_init(&icd->dev, icl); |
1399 | ||
6a6c8786 GL |
1400 | icd->user_width = DEFAULT_WIDTH; |
1401 | icd->user_height = DEFAULT_HEIGHT; | |
1402 | ||
40e2e092 | 1403 | return 0; |
0fd327bd | 1404 | |
40e2e092 GL |
1405 | escdevreg: |
1406 | kfree(icd); | |
0fd327bd | 1407 | |
40e2e092 | 1408 | return ret; |
c41debaf | 1409 | } |
0fd327bd | 1410 | |
5d28d525 GL |
1411 | /* |
1412 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 1413 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
1414 | * been unloaded already |
1415 | */ | |
40e2e092 | 1416 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 1417 | { |
40e2e092 | 1418 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
c41debaf | 1419 | |
40e2e092 | 1420 | if (!icd) |
c41debaf GL |
1421 | return -EINVAL; |
1422 | ||
40e2e092 | 1423 | soc_camera_device_unregister(icd); |
c41debaf | 1424 | |
40e2e092 | 1425 | kfree(icd); |
c41debaf | 1426 | |
0fd327bd GL |
1427 | return 0; |
1428 | } | |
1429 | ||
1430 | static struct platform_driver __refdata soc_camera_pdrv = { | |
40e2e092 GL |
1431 | .remove = __devexit_p(soc_camera_pdrv_remove), |
1432 | .driver = { | |
1433 | .name = "soc-camera-pdrv", | |
1434 | .owner = THIS_MODULE, | |
0fd327bd GL |
1435 | }, |
1436 | }; | |
1437 | ||
e55222ef GL |
1438 | static int __init soc_camera_init(void) |
1439 | { | |
1440 | int ret = bus_register(&soc_camera_bus_type); | |
1441 | if (ret) | |
1442 | return ret; | |
1443 | ret = driver_register(&ic_drv); | |
1444 | if (ret) | |
1445 | goto edrvr; | |
e55222ef | 1446 | |
40e2e092 | 1447 | ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
0fd327bd GL |
1448 | if (ret) |
1449 | goto epdr; | |
1450 | ||
e55222ef GL |
1451 | return 0; |
1452 | ||
0fd327bd GL |
1453 | epdr: |
1454 | driver_unregister(&ic_drv); | |
e55222ef GL |
1455 | edrvr: |
1456 | bus_unregister(&soc_camera_bus_type); | |
1457 | return ret; | |
1458 | } | |
1459 | ||
1460 | static void __exit soc_camera_exit(void) | |
1461 | { | |
0fd327bd | 1462 | platform_driver_unregister(&soc_camera_pdrv); |
e55222ef GL |
1463 | driver_unregister(&ic_drv); |
1464 | bus_unregister(&soc_camera_bus_type); | |
1465 | } | |
1466 | ||
1467 | module_init(soc_camera_init); | |
1468 | module_exit(soc_camera_exit); | |
1469 | ||
1470 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1471 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1472 | MODULE_LICENSE("GPL"); | |
0fd327bd | 1473 | MODULE_ALIAS("platform:soc-camera-pdrv"); |