Commit | Line | Data |
---|---|---|
e55222ef GL |
1 | /* |
2 | * camera image capture (abstract) bus driver | |
3 | * | |
4 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
5 | * | |
6 | * This driver provides an interface between platform-specific camera | |
7 | * busses and camera devices. It should be used if the camera is | |
8 | * connected not over a "proper" bus like PCI or USB, but over a | |
9 | * special bus, like, for example, the Quick Capture interface on PXA270 | |
10 | * SoCs. Later it should also be used for i.MX31 SoCs from Freescale. | |
11 | * It can handle multiple cameras and / or multiple busses, which can | |
12 | * be used, e.g., in stereo-vision applications. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | */ | |
18 | ||
e55222ef | 19 | #include <linux/device.h> |
e55222ef | 20 | #include <linux/err.h> |
0fd327bd GL |
21 | #include <linux/i2c.h> |
22 | #include <linux/init.h> | |
23 | #include <linux/list.h> | |
e55222ef | 24 | #include <linux/mutex.h> |
40e2e092 | 25 | #include <linux/module.h> |
0fd327bd | 26 | #include <linux/platform_device.h> |
e55222ef GL |
27 | #include <linux/vmalloc.h> |
28 | ||
0fd327bd | 29 | #include <media/soc_camera.h> |
e55222ef | 30 | #include <media/v4l2-common.h> |
0fd327bd | 31 | #include <media/v4l2-ioctl.h> |
40e2e092 | 32 | #include <media/v4l2-dev.h> |
092d3921 | 33 | #include <media/videobuf-core.h> |
760697be | 34 | #include <media/soc_mediabus.h> |
e55222ef | 35 | |
df2ed070 GL |
36 | /* Default to VGA resolution */ |
37 | #define DEFAULT_WIDTH 640 | |
38 | #define DEFAULT_HEIGHT 480 | |
39 | ||
e55222ef GL |
40 | static LIST_HEAD(hosts); |
41 | static LIST_HEAD(devices); | |
40e2e092 | 42 | static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ |
e55222ef | 43 | |
c2786ad2 GL |
44 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
45 | struct soc_camera_device *icd, unsigned int fourcc) | |
46 | { | |
47 | unsigned int i; | |
48 | ||
49 | for (i = 0; i < icd->num_user_formats; i++) | |
50 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
51 | return icd->user_formats + i; | |
52 | return NULL; | |
53 | } | |
54 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
55 | ||
bd73b36f GL |
56 | /** |
57 | * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
58 | * @icl: camera platform parameters | |
59 | * @flags: flags to be inverted according to platform configuration | |
60 | * @return: resulting flags | |
61 | */ | |
62 | unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, | |
63 | unsigned long flags) | |
64 | { | |
65 | unsigned long f; | |
66 | ||
67 | /* If only one of the two polarities is supported, switch to the opposite */ | |
68 | if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { | |
69 | f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); | |
70 | if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) | |
71 | flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; | |
72 | } | |
73 | ||
74 | if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { | |
75 | f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); | |
76 | if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) | |
77 | flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; | |
78 | } | |
79 | ||
80 | if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { | |
81 | f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); | |
82 | if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) | |
83 | flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; | |
84 | } | |
85 | ||
86 | return flags; | |
87 | } | |
88 | EXPORT_SYMBOL(soc_camera_apply_sensor_flags); | |
89 | ||
72937890 | 90 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 91 | struct v4l2_format *f) |
e55222ef GL |
92 | { |
93 | struct soc_camera_file *icf = file->private_data; | |
94 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 95 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
96 | |
97 | WARN_ON(priv != file->private_data); | |
98 | ||
ad5f2e85 | 99 | /* limit format to hardware capabilities */ |
06daa1af | 100 | return ici->ops->try_fmt(icd, f); |
e55222ef GL |
101 | } |
102 | ||
103 | static int soc_camera_enum_input(struct file *file, void *priv, | |
104 | struct v4l2_input *inp) | |
105 | { | |
34d359db KM |
106 | struct soc_camera_file *icf = file->private_data; |
107 | struct soc_camera_device *icd = icf->icd; | |
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 | { | |
513791ab KM |
142 | struct soc_camera_file *icf = file->private_data; |
143 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 144 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 145 | |
c9c1f1c0 | 146 | return v4l2_subdev_call(sd, core, s_std, *a); |
e55222ef GL |
147 | } |
148 | ||
149 | static int soc_camera_reqbufs(struct file *file, void *priv, | |
150 | struct v4l2_requestbuffers *p) | |
151 | { | |
152 | int ret; | |
153 | struct soc_camera_file *icf = file->private_data; | |
154 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 155 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
156 | |
157 | WARN_ON(priv != file->private_data); | |
158 | ||
e55222ef GL |
159 | ret = videobuf_reqbufs(&icf->vb_vidq, p); |
160 | if (ret < 0) | |
161 | return ret; | |
162 | ||
b8d9904c | 163 | return ici->ops->reqbufs(icf, p); |
e55222ef GL |
164 | } |
165 | ||
166 | static int soc_camera_querybuf(struct file *file, void *priv, | |
167 | struct v4l2_buffer *p) | |
168 | { | |
169 | struct soc_camera_file *icf = file->private_data; | |
170 | ||
171 | WARN_ON(priv != file->private_data); | |
172 | ||
173 | return videobuf_querybuf(&icf->vb_vidq, p); | |
174 | } | |
175 | ||
176 | static int soc_camera_qbuf(struct file *file, void *priv, | |
177 | struct v4l2_buffer *p) | |
178 | { | |
179 | struct soc_camera_file *icf = file->private_data; | |
180 | ||
181 | WARN_ON(priv != file->private_data); | |
182 | ||
183 | return videobuf_qbuf(&icf->vb_vidq, p); | |
184 | } | |
185 | ||
186 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
187 | struct v4l2_buffer *p) | |
188 | { | |
189 | struct soc_camera_file *icf = file->private_data; | |
190 | ||
191 | WARN_ON(priv != file->private_data); | |
192 | ||
193 | return videobuf_dqbuf(&icf->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
194 | } | |
195 | ||
40e2e092 | 196 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
197 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
198 | { | |
760697be | 199 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
c2786ad2 | 200 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
760697be GL |
201 | int i, fmts = 0, raw_fmts = 0, ret; |
202 | enum v4l2_mbus_pixelcode code; | |
203 | ||
204 | while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) | |
205 | raw_fmts++; | |
c2786ad2 GL |
206 | |
207 | if (!ici->ops->get_formats) | |
208 | /* | |
209 | * Fallback mode - the host will have to serve all | |
210 | * sensor-provided formats one-to-one to the user | |
211 | */ | |
760697be | 212 | fmts = raw_fmts; |
c2786ad2 GL |
213 | else |
214 | /* | |
215 | * First pass - only count formats this host-sensor | |
216 | * configuration can provide | |
217 | */ | |
760697be | 218 | for (i = 0; i < raw_fmts; i++) { |
fa48984e GL |
219 | ret = ici->ops->get_formats(icd, i, NULL); |
220 | if (ret < 0) | |
221 | return ret; | |
222 | fmts += ret; | |
223 | } | |
c2786ad2 GL |
224 | |
225 | if (!fmts) | |
226 | return -ENXIO; | |
227 | ||
228 | icd->user_formats = | |
229 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
230 | if (!icd->user_formats) | |
231 | return -ENOMEM; | |
232 | ||
233 | icd->num_user_formats = fmts; | |
c2786ad2 GL |
234 | |
235 | dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts); | |
236 | ||
237 | /* Second pass - actually fill data formats */ | |
14df2cce | 238 | fmts = 0; |
760697be | 239 | for (i = 0; i < raw_fmts; i++) |
c2786ad2 | 240 | if (!ici->ops->get_formats) { |
760697be GL |
241 | v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); |
242 | icd->user_formats[i].host_fmt = | |
243 | soc_mbus_get_fmtdesc(code); | |
244 | icd->user_formats[i].code = code; | |
c2786ad2 | 245 | } else { |
fa48984e GL |
246 | ret = ici->ops->get_formats(icd, i, |
247 | &icd->user_formats[fmts]); | |
248 | if (ret < 0) | |
249 | goto egfmt; | |
250 | fmts += ret; | |
c2786ad2 GL |
251 | } |
252 | ||
760697be | 253 | icd->current_fmt = &icd->user_formats[0]; |
c2786ad2 GL |
254 | |
255 | return 0; | |
fa48984e GL |
256 | |
257 | egfmt: | |
258 | icd->num_user_formats = 0; | |
259 | vfree(icd->user_formats); | |
260 | return ret; | |
c2786ad2 GL |
261 | } |
262 | ||
40e2e092 | 263 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
264 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
265 | { | |
fa48984e GL |
266 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
267 | ||
268 | if (ici->ops->put_formats) | |
269 | ici->ops->put_formats(icd); | |
40e2e092 | 270 | icd->current_fmt = NULL; |
fa48984e | 271 | icd->num_user_formats = 0; |
c2786ad2 | 272 | vfree(icd->user_formats); |
40e2e092 | 273 | icd->user_formats = NULL; |
c2786ad2 GL |
274 | } |
275 | ||
6a6c8786 GL |
276 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
277 | ((x) >> 24) & 0xff | |
278 | ||
760697be | 279 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
df2ed070 GL |
280 | static int soc_camera_set_fmt(struct soc_camera_file *icf, |
281 | struct v4l2_format *f) | |
282 | { | |
283 | struct soc_camera_device *icd = icf->icd; | |
284 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
285 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
286 | int ret; | |
287 | ||
6a6c8786 GL |
288 | dev_dbg(&icd->dev, "S_FMT(%c%c%c%c, %ux%u)\n", |
289 | pixfmtstr(pix->pixelformat), pix->width, pix->height); | |
290 | ||
df2ed070 GL |
291 | /* We always call try_fmt() before set_fmt() or set_crop() */ |
292 | ret = ici->ops->try_fmt(icd, f); | |
293 | if (ret < 0) | |
294 | return ret; | |
295 | ||
296 | ret = ici->ops->set_fmt(icd, f); | |
297 | if (ret < 0) { | |
298 | return ret; | |
299 | } else if (!icd->current_fmt || | |
760697be | 300 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
2aa58db4 | 301 | dev_err(&icd->dev, |
df2ed070 GL |
302 | "Host driver hasn't set up current format correctly!\n"); |
303 | return -EINVAL; | |
304 | } | |
305 | ||
6a6c8786 GL |
306 | icd->user_width = pix->width; |
307 | icd->user_height = pix->height; | |
760697be | 308 | icd->colorspace = pix->colorspace; |
6a6c8786 GL |
309 | icf->vb_vidq.field = |
310 | icd->field = pix->field; | |
025c18a1 | 311 | |
df2ed070 GL |
312 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
313 | dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n", | |
314 | f->type); | |
315 | ||
316 | dev_dbg(&icd->dev, "set width: %d height: %d\n", | |
6a6c8786 | 317 | icd->user_width, icd->user_height); |
df2ed070 GL |
318 | |
319 | /* set physical bus parameters */ | |
320 | return ici->ops->set_bus_param(icd, pix->pixelformat); | |
321 | } | |
322 | ||
bec43661 | 323 | static int soc_camera_open(struct file *file) |
e55222ef | 324 | { |
979ea1dd | 325 | struct video_device *vdev = video_devdata(file); |
96c75399 GL |
326 | struct soc_camera_device *icd = container_of(vdev->parent, |
327 | struct soc_camera_device, | |
328 | dev); | |
979ea1dd | 329 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
9dc4e48f | 330 | struct soc_camera_host *ici; |
e55222ef GL |
331 | struct soc_camera_file *icf; |
332 | int ret; | |
333 | ||
40e2e092 GL |
334 | if (!icd->ops) |
335 | /* No device driver attached */ | |
336 | return -ENODEV; | |
337 | ||
9dc4e48f | 338 | ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 339 | |
40e2e092 GL |
340 | icf = vmalloc(sizeof(*icf)); |
341 | if (!icf) | |
342 | return -ENOMEM; | |
343 | ||
b8d9904c | 344 | if (!try_module_get(ici->ops->owner)) { |
e55222ef GL |
345 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); |
346 | ret = -EINVAL; | |
347 | goto emgi; | |
348 | } | |
349 | ||
96c75399 GL |
350 | /* |
351 | * Protect against icd->ops->remove() until we module_get() both | |
352 | * drivers. | |
353 | */ | |
1c3bb743 GL |
354 | mutex_lock(&icd->video_lock); |
355 | ||
9dc4e48f | 356 | icf->icd = icd; |
1a0063a9 GL |
357 | icd->use_count++; |
358 | ||
9dc4e48f GL |
359 | /* Now we really have to activate the camera */ |
360 | if (icd->use_count == 1) { | |
025c18a1 | 361 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
362 | struct v4l2_format f = { |
363 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
364 | .fmt.pix = { | |
6a6c8786 GL |
365 | .width = icd->user_width, |
366 | .height = icd->user_height, | |
025c18a1 | 367 | .field = icd->field, |
760697be GL |
368 | .colorspace = icd->colorspace, |
369 | .pixelformat = | |
370 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
371 | }, |
372 | }; | |
373 | ||
979ea1dd GL |
374 | if (icl->power) { |
375 | ret = icl->power(icd->pdev, 1); | |
376 | if (ret < 0) | |
377 | goto epower; | |
378 | } | |
379 | ||
380 | /* The camera could have been already on, try to reset */ | |
381 | if (icl->reset) | |
382 | icl->reset(icd->pdev); | |
383 | ||
b8d9904c | 384 | ret = ici->ops->add(icd); |
9dc4e48f GL |
385 | if (ret < 0) { |
386 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
9dc4e48f GL |
387 | goto eiciadd; |
388 | } | |
df2ed070 | 389 | |
760697be GL |
390 | /* |
391 | * Try to configure with default parameters. Notice: this is the | |
392 | * very first open, so, we cannot race against other calls, | |
393 | * apart from someone else calling open() simultaneously, but | |
394 | * .video_lock is protecting us against it. | |
395 | */ | |
df2ed070 GL |
396 | ret = soc_camera_set_fmt(icf, &f); |
397 | if (ret < 0) | |
398 | goto esfmt; | |
9dc4e48f GL |
399 | } |
400 | ||
e55222ef GL |
401 | file->private_data = icf; |
402 | dev_dbg(&icd->dev, "camera device open\n"); | |
403 | ||
a034d1b7 | 404 | ici->ops->init_videobuf(&icf->vb_vidq, icd); |
e55222ef | 405 | |
979ea1dd GL |
406 | mutex_unlock(&icd->video_lock); |
407 | ||
e55222ef GL |
408 | return 0; |
409 | ||
df2ed070 | 410 | /* |
979ea1dd | 411 | * First five errors are entered with the .video_lock held |
df2ed070 GL |
412 | * and use_count == 1 |
413 | */ | |
414 | esfmt: | |
415 | ici->ops->remove(icd); | |
9dc4e48f | 416 | eiciadd: |
979ea1dd GL |
417 | if (icl->power) |
418 | icl->power(icd->pdev, 0); | |
419 | epower: | |
c2786ad2 | 420 | icd->use_count--; |
1c3bb743 | 421 | mutex_unlock(&icd->video_lock); |
b8d9904c | 422 | module_put(ici->ops->owner); |
e55222ef | 423 | emgi: |
e55222ef GL |
424 | vfree(icf); |
425 | return ret; | |
426 | } | |
427 | ||
bec43661 | 428 | static int soc_camera_close(struct file *file) |
e55222ef GL |
429 | { |
430 | struct soc_camera_file *icf = file->private_data; | |
431 | struct soc_camera_device *icd = icf->icd; | |
432 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
e55222ef | 433 | |
1c3bb743 | 434 | mutex_lock(&icd->video_lock); |
9dc4e48f | 435 | icd->use_count--; |
40e2e092 | 436 | if (!icd->use_count) { |
979ea1dd GL |
437 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
438 | ||
b8d9904c | 439 | ici->ops->remove(icd); |
979ea1dd GL |
440 | if (icl->power) |
441 | icl->power(icd->pdev, 0); | |
40e2e092 | 442 | } |
025c18a1 | 443 | |
1c3bb743 GL |
444 | mutex_unlock(&icd->video_lock); |
445 | ||
b8d9904c | 446 | module_put(ici->ops->owner); |
9dc4e48f | 447 | |
1a0063a9 | 448 | vfree(icf); |
e55222ef | 449 | |
2aa58db4 | 450 | dev_dbg(&icd->dev, "camera device close\n"); |
e55222ef GL |
451 | |
452 | return 0; | |
453 | } | |
454 | ||
aba360d8 | 455 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 456 | size_t count, loff_t *ppos) |
e55222ef GL |
457 | { |
458 | struct soc_camera_file *icf = file->private_data; | |
459 | struct soc_camera_device *icd = icf->icd; | |
e55222ef GL |
460 | int err = -EINVAL; |
461 | ||
2aa58db4 | 462 | dev_err(&icd->dev, "camera device read not implemented\n"); |
e55222ef GL |
463 | |
464 | return err; | |
465 | } | |
466 | ||
467 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
468 | { | |
469 | struct soc_camera_file *icf = file->private_data; | |
470 | struct soc_camera_device *icd = icf->icd; | |
471 | int err; | |
472 | ||
473 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
474 | ||
475 | err = videobuf_mmap_mapper(&icf->vb_vidq, vma); | |
476 | ||
477 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
478 | (unsigned long)vma->vm_start, | |
479 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
480 | err); | |
481 | ||
482 | return err; | |
483 | } | |
484 | ||
485 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
486 | { | |
487 | struct soc_camera_file *icf = file->private_data; | |
488 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 489 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
490 | |
491 | if (list_empty(&icf->vb_vidq.stream)) { | |
492 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); | |
493 | return POLLERR; | |
494 | } | |
495 | ||
b8d9904c | 496 | return ici->ops->poll(file, pt); |
e55222ef GL |
497 | } |
498 | ||
bec43661 | 499 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
500 | .owner = THIS_MODULE, |
501 | .open = soc_camera_open, | |
502 | .release = soc_camera_close, | |
503 | .ioctl = video_ioctl2, | |
504 | .read = soc_camera_read, | |
505 | .mmap = soc_camera_mmap, | |
506 | .poll = soc_camera_poll, | |
e55222ef GL |
507 | }; |
508 | ||
72937890 | 509 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 510 | struct v4l2_format *f) |
e55222ef GL |
511 | { |
512 | struct soc_camera_file *icf = file->private_data; | |
513 | struct soc_camera_device *icd = icf->icd; | |
e55222ef | 514 | int ret; |
e55222ef GL |
515 | |
516 | WARN_ON(priv != file->private_data); | |
517 | ||
1c3bb743 GL |
518 | mutex_lock(&icf->vb_vidq.vb_lock); |
519 | ||
b897a91a GL |
520 | if (icf->vb_vidq.bufs[0]) { |
521 | dev_err(&icd->dev, "S_FMT denied: queue initialised\n"); | |
1c3bb743 GL |
522 | ret = -EBUSY; |
523 | goto unlock; | |
524 | } | |
525 | ||
df2ed070 | 526 | ret = soc_camera_set_fmt(icf, f); |
1c3bb743 GL |
527 | |
528 | unlock: | |
529 | mutex_unlock(&icf->vb_vidq.vb_lock); | |
530 | ||
531 | return ret; | |
e55222ef GL |
532 | } |
533 | ||
72937890 | 534 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 535 | struct v4l2_fmtdesc *f) |
e55222ef GL |
536 | { |
537 | struct soc_camera_file *icf = file->private_data; | |
538 | struct soc_camera_device *icd = icf->icd; | |
760697be | 539 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
540 | |
541 | WARN_ON(priv != file->private_data); | |
542 | ||
c2786ad2 | 543 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
544 | return -EINVAL; |
545 | ||
c2786ad2 | 546 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 547 | |
760697be GL |
548 | if (format->name) |
549 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
550 | f->pixelformat = format->fourcc; |
551 | return 0; | |
552 | } | |
553 | ||
72937890 | 554 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 555 | struct v4l2_format *f) |
e55222ef GL |
556 | { |
557 | struct soc_camera_file *icf = file->private_data; | |
558 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 559 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
560 | |
561 | WARN_ON(priv != file->private_data); | |
562 | ||
6a6c8786 GL |
563 | pix->width = icd->user_width; |
564 | pix->height = icd->user_height; | |
64f5905e | 565 | pix->field = icf->vb_vidq.field; |
760697be GL |
566 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
567 | pix->bytesperline = soc_mbus_bytes_per_line(pix->width, | |
568 | icd->current_fmt->host_fmt); | |
569 | pix->colorspace = icd->colorspace; | |
570 | if (pix->bytesperline < 0) | |
571 | return pix->bytesperline; | |
64f5905e | 572 | pix->sizeimage = pix->height * pix->bytesperline; |
e55222ef | 573 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 574 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
575 | return 0; |
576 | } | |
577 | ||
578 | static int soc_camera_querycap(struct file *file, void *priv, | |
579 | struct v4l2_capability *cap) | |
580 | { | |
581 | struct soc_camera_file *icf = file->private_data; | |
582 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 583 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
584 | |
585 | WARN_ON(priv != file->private_data); | |
586 | ||
587 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 588 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
589 | } |
590 | ||
591 | static int soc_camera_streamon(struct file *file, void *priv, | |
592 | enum v4l2_buf_type i) | |
593 | { | |
594 | struct soc_camera_file *icf = file->private_data; | |
595 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 596 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 597 | int ret; |
e55222ef GL |
598 | |
599 | WARN_ON(priv != file->private_data); | |
600 | ||
e55222ef GL |
601 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
602 | return -EINVAL; | |
603 | ||
1c3bb743 GL |
604 | mutex_lock(&icd->video_lock); |
605 | ||
c9c1f1c0 | 606 | v4l2_subdev_call(sd, video, s_stream, 1); |
e55222ef GL |
607 | |
608 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | |
1c3bb743 GL |
609 | ret = videobuf_streamon(&icf->vb_vidq); |
610 | ||
611 | mutex_unlock(&icd->video_lock); | |
612 | ||
613 | return ret; | |
e55222ef GL |
614 | } |
615 | ||
616 | static int soc_camera_streamoff(struct file *file, void *priv, | |
617 | enum v4l2_buf_type i) | |
618 | { | |
619 | struct soc_camera_file *icf = file->private_data; | |
620 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 621 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef GL |
622 | |
623 | WARN_ON(priv != file->private_data); | |
624 | ||
e55222ef GL |
625 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
626 | return -EINVAL; | |
627 | ||
1c3bb743 GL |
628 | mutex_lock(&icd->video_lock); |
629 | ||
5d28d525 GL |
630 | /* |
631 | * This calls buf_release from host driver's videobuf_queue_ops for all | |
632 | * remaining buffers. When the last buffer is freed, stop capture | |
633 | */ | |
e55222ef GL |
634 | videobuf_streamoff(&icf->vb_vidq); |
635 | ||
c9c1f1c0 | 636 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef | 637 | |
1c3bb743 GL |
638 | mutex_unlock(&icd->video_lock); |
639 | ||
e55222ef GL |
640 | return 0; |
641 | } | |
642 | ||
643 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
644 | struct v4l2_queryctrl *qc) | |
645 | { | |
646 | struct soc_camera_file *icf = file->private_data; | |
647 | struct soc_camera_device *icd = icf->icd; | |
2840d249 | 648 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
649 | int i; |
650 | ||
651 | WARN_ON(priv != file->private_data); | |
652 | ||
653 | if (!qc->id) | |
654 | return -EINVAL; | |
655 | ||
2840d249 GL |
656 | /* First check host controls */ |
657 | for (i = 0; i < ici->ops->num_controls; i++) | |
658 | if (qc->id == ici->ops->controls[i].id) { | |
659 | memcpy(qc, &(ici->ops->controls[i]), | |
660 | sizeof(*qc)); | |
661 | return 0; | |
662 | } | |
663 | ||
664 | /* Then device controls */ | |
e55222ef GL |
665 | for (i = 0; i < icd->ops->num_controls; i++) |
666 | if (qc->id == icd->ops->controls[i].id) { | |
667 | memcpy(qc, &(icd->ops->controls[i]), | |
668 | sizeof(*qc)); | |
669 | return 0; | |
670 | } | |
671 | ||
672 | return -EINVAL; | |
673 | } | |
674 | ||
675 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
676 | struct v4l2_control *ctrl) | |
677 | { | |
678 | struct soc_camera_file *icf = file->private_data; | |
679 | struct soc_camera_device *icd = icf->icd; | |
979ea1dd | 680 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 681 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 682 | int ret; |
e55222ef GL |
683 | |
684 | WARN_ON(priv != file->private_data); | |
685 | ||
2840d249 GL |
686 | if (ici->ops->get_ctrl) { |
687 | ret = ici->ops->get_ctrl(icd, ctrl); | |
688 | if (ret != -ENOIOCTLCMD) | |
689 | return ret; | |
690 | } | |
691 | ||
c9c1f1c0 | 692 | return v4l2_subdev_call(sd, core, g_ctrl, ctrl); |
e55222ef GL |
693 | } |
694 | ||
695 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
696 | struct v4l2_control *ctrl) | |
697 | { | |
698 | struct soc_camera_file *icf = file->private_data; | |
699 | struct soc_camera_device *icd = icf->icd; | |
979ea1dd | 700 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 701 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 702 | int ret; |
e55222ef GL |
703 | |
704 | WARN_ON(priv != file->private_data); | |
705 | ||
2840d249 GL |
706 | if (ici->ops->set_ctrl) { |
707 | ret = ici->ops->set_ctrl(icd, ctrl); | |
708 | if (ret != -ENOIOCTLCMD) | |
709 | return ret; | |
710 | } | |
711 | ||
c9c1f1c0 | 712 | return v4l2_subdev_call(sd, core, s_ctrl, ctrl); |
e55222ef GL |
713 | } |
714 | ||
715 | static int soc_camera_cropcap(struct file *file, void *fh, | |
716 | struct v4l2_cropcap *a) | |
717 | { | |
718 | struct soc_camera_file *icf = file->private_data; | |
719 | struct soc_camera_device *icd = icf->icd; | |
6a6c8786 | 720 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 721 | |
6a6c8786 | 722 | return ici->ops->cropcap(icd, a); |
e55222ef GL |
723 | } |
724 | ||
725 | static int soc_camera_g_crop(struct file *file, void *fh, | |
726 | struct v4l2_crop *a) | |
727 | { | |
728 | struct soc_camera_file *icf = file->private_data; | |
729 | struct soc_camera_device *icd = icf->icd; | |
6a6c8786 GL |
730 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
731 | int ret; | |
e55222ef | 732 | |
6a6c8786 GL |
733 | mutex_lock(&icf->vb_vidq.vb_lock); |
734 | ret = ici->ops->get_crop(icd, a); | |
735 | mutex_unlock(&icf->vb_vidq.vb_lock); | |
e55222ef | 736 | |
6a6c8786 | 737 | return ret; |
e55222ef GL |
738 | } |
739 | ||
68a54f0e GL |
740 | /* |
741 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
742 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
743 | * retrieve it. However, we expect camera host and client drivers to update | |
744 | * the argument, which we then use internally, but do not return to the user. | |
745 | */ | |
e55222ef GL |
746 | static int soc_camera_s_crop(struct file *file, void *fh, |
747 | struct v4l2_crop *a) | |
748 | { | |
749 | struct soc_camera_file *icf = file->private_data; | |
750 | struct soc_camera_device *icd = icf->icd; | |
64f5905e | 751 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
6a6c8786 GL |
752 | struct v4l2_rect *rect = &a->c; |
753 | struct v4l2_crop current_crop; | |
e55222ef GL |
754 | int ret; |
755 | ||
756 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
757 | return -EINVAL; | |
758 | ||
6a6c8786 GL |
759 | dev_dbg(&icd->dev, "S_CROP(%ux%u@%u:%u)\n", |
760 | rect->width, rect->height, rect->left, rect->top); | |
761 | ||
1c3bb743 GL |
762 | /* Cropping is allowed during a running capture, guard consistency */ |
763 | mutex_lock(&icf->vb_vidq.vb_lock); | |
764 | ||
6a6c8786 GL |
765 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
766 | ret = ici->ops->get_crop(icd, ¤t_crop); | |
767 | ||
b897a91a | 768 | /* Prohibit window size change with initialised buffers */ |
6a6c8786 GL |
769 | if (icf->vb_vidq.bufs[0] && !ret && |
770 | (a->c.width != current_crop.c.width || | |
771 | a->c.height != current_crop.c.height)) { | |
b897a91a GL |
772 | dev_err(&icd->dev, |
773 | "S_CROP denied: queue initialised and sizes differ\n"); | |
774 | ret = -EBUSY; | |
6a6c8786 GL |
775 | } else { |
776 | ret = ici->ops->set_crop(icd, a); | |
b897a91a GL |
777 | } |
778 | ||
1c3bb743 GL |
779 | mutex_unlock(&icf->vb_vidq.vb_lock); |
780 | ||
e55222ef GL |
781 | return ret; |
782 | } | |
783 | ||
784 | static int soc_camera_g_chip_ident(struct file *file, void *fh, | |
aecde8b5 | 785 | struct v4l2_dbg_chip_ident *id) |
e55222ef GL |
786 | { |
787 | struct soc_camera_file *icf = file->private_data; | |
788 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 789 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 790 | |
c9c1f1c0 | 791 | return v4l2_subdev_call(sd, core, g_chip_ident, id); |
e55222ef GL |
792 | } |
793 | ||
794 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
795 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 796 | struct v4l2_dbg_register *reg) |
e55222ef GL |
797 | { |
798 | struct soc_camera_file *icf = file->private_data; | |
799 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 800 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 801 | |
c9c1f1c0 | 802 | return v4l2_subdev_call(sd, core, g_register, reg); |
e55222ef GL |
803 | } |
804 | ||
805 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 806 | struct v4l2_dbg_register *reg) |
e55222ef GL |
807 | { |
808 | struct soc_camera_file *icf = file->private_data; | |
809 | struct soc_camera_device *icd = icf->icd; | |
c9c1f1c0 | 810 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 811 | |
c9c1f1c0 | 812 | return v4l2_subdev_call(sd, core, s_register, reg); |
e55222ef GL |
813 | } |
814 | #endif | |
815 | ||
e55222ef GL |
816 | /* So far this function cannot fail */ |
817 | static void scan_add_host(struct soc_camera_host *ici) | |
818 | { | |
819 | struct soc_camera_device *icd; | |
820 | ||
821 | mutex_lock(&list_lock); | |
822 | ||
823 | list_for_each_entry(icd, &devices, list) { | |
824 | if (icd->iface == ici->nr) { | |
40e2e092 | 825 | int ret; |
979ea1dd | 826 | icd->dev.parent = ici->v4l2_dev.dev; |
40e2e092 GL |
827 | dev_set_name(&icd->dev, "%u-%u", icd->iface, |
828 | icd->devnum); | |
829 | ret = device_register(&icd->dev); | |
830 | if (ret < 0) { | |
831 | icd->dev.parent = NULL; | |
832 | dev_err(&icd->dev, | |
833 | "Cannot register device: %d\n", ret); | |
834 | } | |
e55222ef GL |
835 | } |
836 | } | |
837 | ||
838 | mutex_unlock(&list_lock); | |
839 | } | |
840 | ||
40e2e092 GL |
841 | #ifdef CONFIG_I2C_BOARDINFO |
842 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | |
843 | struct soc_camera_link *icl) | |
e55222ef | 844 | { |
40e2e092 | 845 | struct i2c_client *client; |
979ea1dd | 846 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
40e2e092 | 847 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); |
979ea1dd | 848 | struct v4l2_subdev *subdev; |
e55222ef | 849 | |
40e2e092 | 850 | if (!adap) { |
40e2e092 GL |
851 | dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n", |
852 | icl->i2c_adapter_id); | |
853 | goto ei2cga; | |
854 | } | |
e55222ef | 855 | |
40e2e092 | 856 | icl->board_info->platform_data = icd; |
e55222ef | 857 | |
979ea1dd GL |
858 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
859 | icl->module_name, icl->board_info, NULL); | |
d74f841c | 860 | if (!subdev) |
40e2e092 | 861 | goto ei2cnd; |
e55222ef | 862 | |
979ea1dd GL |
863 | client = subdev->priv; |
864 | ||
40e2e092 GL |
865 | /* Use to_i2c_client(dev) to recover the i2c client */ |
866 | dev_set_drvdata(&icd->dev, &client->dev); | |
e55222ef | 867 | |
40e2e092 GL |
868 | return 0; |
869 | ei2cnd: | |
870 | i2c_put_adapter(adap); | |
871 | ei2cga: | |
d74f841c | 872 | return -ENODEV; |
e55222ef GL |
873 | } |
874 | ||
40e2e092 GL |
875 | static void soc_camera_free_i2c(struct soc_camera_device *icd) |
876 | { | |
877 | struct i2c_client *client = | |
878 | to_i2c_client(to_soc_camera_control(icd)); | |
879 | dev_set_drvdata(&icd->dev, NULL); | |
979ea1dd | 880 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 GL |
881 | i2c_unregister_device(client); |
882 | i2c_put_adapter(client->adapter); | |
883 | } | |
884 | #else | |
885 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | |
886 | #define soc_camera_free_i2c(icd) do {} while (0) | |
887 | #endif | |
888 | ||
979ea1dd | 889 | static int soc_camera_video_start(struct soc_camera_device *icd); |
40e2e092 GL |
890 | static int video_dev_create(struct soc_camera_device *icd); |
891 | /* Called during host-driver probe */ | |
e55222ef GL |
892 | static int soc_camera_probe(struct device *dev) |
893 | { | |
894 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
979ea1dd | 895 | struct soc_camera_host *ici = to_soc_camera_host(dev->parent); |
40e2e092 | 896 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
979ea1dd | 897 | struct device *control = NULL; |
6a6c8786 | 898 | struct v4l2_subdev *sd; |
760697be | 899 | struct v4l2_mbus_framefmt mf; |
e55222ef GL |
900 | int ret; |
901 | ||
40e2e092 | 902 | dev_info(dev, "Probing %s\n", dev_name(dev)); |
1c3bb743 | 903 | |
979ea1dd GL |
904 | if (icl->power) { |
905 | ret = icl->power(icd->pdev, 1); | |
906 | if (ret < 0) { | |
907 | dev_err(dev, | |
908 | "Platform failed to power-on the camera.\n"); | |
909 | goto epower; | |
910 | } | |
911 | } | |
912 | ||
913 | /* The camera could have been already on, try to reset */ | |
914 | if (icl->reset) | |
915 | icl->reset(icd->pdev); | |
916 | ||
917 | ret = ici->ops->add(icd); | |
918 | if (ret < 0) | |
919 | goto eadd; | |
920 | ||
921 | /* Must have icd->vdev before registering the device */ | |
40e2e092 GL |
922 | ret = video_dev_create(icd); |
923 | if (ret < 0) | |
924 | goto evdc; | |
1c3bb743 | 925 | |
40e2e092 GL |
926 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
927 | if (icl->board_info) { | |
928 | ret = soc_camera_init_i2c(icd, icl); | |
929 | if (ret < 0) | |
930 | goto eadddev; | |
931 | } else if (!icl->add_device || !icl->del_device) { | |
1c3bb743 | 932 | ret = -EINVAL; |
40e2e092 GL |
933 | goto eadddev; |
934 | } else { | |
979ea1dd GL |
935 | if (icl->module_name) |
936 | ret = request_module(icl->module_name); | |
937 | ||
40e2e092 GL |
938 | ret = icl->add_device(icl, &icd->dev); |
939 | if (ret < 0) | |
940 | goto eadddev; | |
1c3bb743 | 941 | |
96c75399 GL |
942 | /* |
943 | * FIXME: this is racy, have to use driver-binding notification, | |
944 | * when it is available | |
945 | */ | |
979ea1dd | 946 | control = to_soc_camera_control(icd); |
08590b96 | 947 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd GL |
948 | !try_module_get(control->driver->owner)) { |
949 | icl->del_device(icl); | |
950 | goto enodrv; | |
951 | } | |
40e2e092 | 952 | } |
e55222ef | 953 | |
fa48984e GL |
954 | /* At this point client .probe() should have run already */ |
955 | ret = soc_camera_init_user_formats(icd); | |
956 | if (ret < 0) | |
957 | goto eiufmt; | |
958 | ||
fa48984e GL |
959 | icd->field = V4L2_FIELD_ANY; |
960 | ||
979ea1dd GL |
961 | /* ..._video_start() will create a device node, so we have to protect */ |
962 | mutex_lock(&icd->video_lock); | |
963 | ||
964 | ret = soc_camera_video_start(icd); | |
965 | if (ret < 0) | |
966 | goto evidstart; | |
967 | ||
6a6c8786 GL |
968 | /* Try to improve our guess of a reasonable window format */ |
969 | sd = soc_camera_to_subdev(icd); | |
760697be GL |
970 | if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { |
971 | icd->user_width = mf.width; | |
972 | icd->user_height = mf.height; | |
973 | icd->colorspace = mf.colorspace; | |
974 | icd->field = mf.field; | |
6a6c8786 GL |
975 | } |
976 | ||
40e2e092 | 977 | /* Do we have to sysfs_remove_link() before device_unregister()? */ |
6a6c8786 | 978 | if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj, |
40e2e092 GL |
979 | "control")) |
980 | dev_warn(&icd->dev, "Failed creating the control symlink\n"); | |
025c18a1 | 981 | |
979ea1dd GL |
982 | ici->ops->remove(icd); |
983 | ||
984 | if (icl->power) | |
985 | icl->power(icd->pdev, 0); | |
986 | ||
987 | mutex_unlock(&icd->video_lock); | |
025c18a1 | 988 | |
40e2e092 | 989 | return 0; |
e55222ef | 990 | |
979ea1dd GL |
991 | evidstart: |
992 | mutex_unlock(&icd->video_lock); | |
fa48984e GL |
993 | soc_camera_free_user_formats(icd); |
994 | eiufmt: | |
979ea1dd | 995 | if (icl->board_info) { |
40e2e092 | 996 | soc_camera_free_i2c(icd); |
979ea1dd | 997 | } else { |
40e2e092 | 998 | icl->del_device(icl); |
979ea1dd GL |
999 | module_put(control->driver->owner); |
1000 | } | |
1001 | enodrv: | |
40e2e092 GL |
1002 | eadddev: |
1003 | video_device_release(icd->vdev); | |
1004 | evdc: | |
979ea1dd GL |
1005 | ici->ops->remove(icd); |
1006 | eadd: | |
1007 | if (icl->power) | |
1008 | icl->power(icd->pdev, 0); | |
1009 | epower: | |
e55222ef GL |
1010 | return ret; |
1011 | } | |
1012 | ||
5d28d525 GL |
1013 | /* |
1014 | * This is called on device_unregister, which only means we have to disconnect | |
1015 | * from the host, but not remove ourselves from the device list | |
1016 | */ | |
e55222ef GL |
1017 | static int soc_camera_remove(struct device *dev) |
1018 | { | |
1019 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
40e2e092 GL |
1020 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
1021 | struct video_device *vdev = icd->vdev; | |
e55222ef | 1022 | |
40e2e092 | 1023 | BUG_ON(!dev->parent); |
e55222ef | 1024 | |
40e2e092 GL |
1025 | if (vdev) { |
1026 | mutex_lock(&icd->video_lock); | |
1027 | video_unregister_device(vdev); | |
1028 | icd->vdev = NULL; | |
1029 | mutex_unlock(&icd->video_lock); | |
1030 | } | |
1031 | ||
979ea1dd | 1032 | if (icl->board_info) { |
40e2e092 | 1033 | soc_camera_free_i2c(icd); |
979ea1dd GL |
1034 | } else { |
1035 | struct device_driver *drv = to_soc_camera_control(icd) ? | |
1036 | to_soc_camera_control(icd)->driver : NULL; | |
1037 | if (drv) { | |
1038 | icl->del_device(icl); | |
1039 | module_put(drv->owner); | |
1040 | } | |
1041 | } | |
fa48984e | 1042 | soc_camera_free_user_formats(icd); |
025c18a1 | 1043 | |
e55222ef GL |
1044 | return 0; |
1045 | } | |
1046 | ||
2e521061 RJ |
1047 | static int soc_camera_suspend(struct device *dev, pm_message_t state) |
1048 | { | |
1049 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1050 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1051 | int ret = 0; | |
1052 | ||
1053 | if (ici->ops->suspend) | |
1054 | ret = ici->ops->suspend(icd, state); | |
1055 | ||
1056 | return ret; | |
1057 | } | |
1058 | ||
1059 | static int soc_camera_resume(struct device *dev) | |
1060 | { | |
1061 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1062 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1063 | int ret = 0; | |
1064 | ||
1065 | if (ici->ops->resume) | |
1066 | ret = ici->ops->resume(icd); | |
1067 | ||
1068 | return ret; | |
1069 | } | |
1070 | ||
e55222ef GL |
1071 | static struct bus_type soc_camera_bus_type = { |
1072 | .name = "soc-camera", | |
1073 | .probe = soc_camera_probe, | |
1074 | .remove = soc_camera_remove, | |
2e521061 RJ |
1075 | .suspend = soc_camera_suspend, |
1076 | .resume = soc_camera_resume, | |
e55222ef GL |
1077 | }; |
1078 | ||
1079 | static struct device_driver ic_drv = { | |
1080 | .name = "camera", | |
1081 | .bus = &soc_camera_bus_type, | |
1082 | .owner = THIS_MODULE, | |
1083 | }; | |
1084 | ||
e55222ef GL |
1085 | static void dummy_release(struct device *dev) |
1086 | { | |
1087 | } | |
1088 | ||
6a6c8786 GL |
1089 | static int default_cropcap(struct soc_camera_device *icd, |
1090 | struct v4l2_cropcap *a) | |
1091 | { | |
1092 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1093 | return v4l2_subdev_call(sd, video, cropcap, a); | |
1094 | } | |
1095 | ||
1096 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1097 | { | |
1098 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1099 | return v4l2_subdev_call(sd, video, g_crop, a); | |
1100 | } | |
1101 | ||
1102 | static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1103 | { | |
1104 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1105 | return v4l2_subdev_call(sd, video, s_crop, a); | |
1106 | } | |
1107 | ||
64ff9ba5 GL |
1108 | static void soc_camera_device_init(struct device *dev, void *pdata) |
1109 | { | |
1110 | dev->platform_data = pdata; | |
1111 | dev->bus = &soc_camera_bus_type; | |
1112 | dev->release = dummy_release; | |
1113 | } | |
1114 | ||
b8d9904c | 1115 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1116 | { |
e55222ef | 1117 | struct soc_camera_host *ix; |
979ea1dd | 1118 | int ret; |
e55222ef | 1119 | |
64f5905e GL |
1120 | if (!ici || !ici->ops || |
1121 | !ici->ops->try_fmt || | |
1122 | !ici->ops->set_fmt || | |
1123 | !ici->ops->set_bus_param || | |
1124 | !ici->ops->querycap || | |
1125 | !ici->ops->init_videobuf || | |
1126 | !ici->ops->reqbufs || | |
1127 | !ici->ops->add || | |
1128 | !ici->ops->remove || | |
eff505fa | 1129 | !ici->ops->poll || |
979ea1dd | 1130 | !ici->v4l2_dev.dev) |
e55222ef GL |
1131 | return -EINVAL; |
1132 | ||
6a6c8786 GL |
1133 | if (!ici->ops->set_crop) |
1134 | ici->ops->set_crop = default_s_crop; | |
1135 | if (!ici->ops->get_crop) | |
1136 | ici->ops->get_crop = default_g_crop; | |
1137 | if (!ici->ops->cropcap) | |
1138 | ici->ops->cropcap = default_cropcap; | |
1139 | ||
e55222ef GL |
1140 | mutex_lock(&list_lock); |
1141 | list_for_each_entry(ix, &hosts, list) { | |
1142 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1143 | ret = -EBUSY; |
1144 | goto edevreg; | |
e55222ef GL |
1145 | } |
1146 | } | |
1147 | ||
979ea1dd GL |
1148 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1149 | if (ret < 0) | |
1150 | goto edevreg; | |
eff505fa | 1151 | |
e55222ef GL |
1152 | list_add_tail(&ici->list, &hosts); |
1153 | mutex_unlock(&list_lock); | |
1154 | ||
e55222ef GL |
1155 | scan_add_host(ici); |
1156 | ||
1157 | return 0; | |
979ea1dd GL |
1158 | |
1159 | edevreg: | |
1160 | mutex_unlock(&list_lock); | |
1161 | return ret; | |
e55222ef GL |
1162 | } |
1163 | EXPORT_SYMBOL(soc_camera_host_register); | |
1164 | ||
1165 | /* Unregister all clients! */ | |
1166 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1167 | { | |
1168 | struct soc_camera_device *icd; | |
1169 | ||
1170 | mutex_lock(&list_lock); | |
1171 | ||
1172 | list_del(&ici->list); | |
1173 | ||
1174 | list_for_each_entry(icd, &devices, list) { | |
979ea1dd | 1175 | if (icd->iface == ici->nr) { |
64ff9ba5 | 1176 | void *pdata = icd->dev.platform_data; |
40e2e092 | 1177 | /* The bus->remove will be called */ |
e55222ef | 1178 | device_unregister(&icd->dev); |
76823b79 GL |
1179 | /* |
1180 | * Not before device_unregister(), .remove | |
1181 | * needs parent to call ici->ops->remove(). | |
1182 | * If the host module is loaded again, device_register() | |
1183 | * would complain "already initialised," since 2.6.32 | |
1184 | * this is also needed to prevent use-after-free of the | |
1185 | * device private data. | |
1186 | */ | |
1187 | memset(&icd->dev, 0, sizeof(icd->dev)); | |
64ff9ba5 | 1188 | soc_camera_device_init(&icd->dev, pdata); |
e55222ef GL |
1189 | } |
1190 | } | |
1191 | ||
1192 | mutex_unlock(&list_lock); | |
1193 | ||
979ea1dd | 1194 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1195 | } |
1196 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1197 | ||
1198 | /* Image capture device */ | |
40e2e092 | 1199 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1200 | { |
1201 | struct soc_camera_device *ix; | |
1202 | int num = -1, i; | |
1203 | ||
e55222ef GL |
1204 | for (i = 0; i < 256 && num < 0; i++) { |
1205 | num = i; | |
40e2e092 | 1206 | /* Check if this index is available on this interface */ |
e55222ef GL |
1207 | list_for_each_entry(ix, &devices, list) { |
1208 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1209 | num = -1; | |
1210 | break; | |
1211 | } | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | if (num < 0) | |
5d28d525 GL |
1216 | /* |
1217 | * ok, we have 256 cameras on this host... | |
1218 | * man, stay reasonable... | |
1219 | */ | |
e55222ef GL |
1220 | return -ENOMEM; |
1221 | ||
64ff9ba5 | 1222 | icd->devnum = num; |
64f5905e GL |
1223 | icd->use_count = 0; |
1224 | icd->host_priv = NULL; | |
1c3bb743 | 1225 | mutex_init(&icd->video_lock); |
e55222ef | 1226 | |
40e2e092 GL |
1227 | list_add_tail(&icd->list, &devices); |
1228 | ||
1229 | return 0; | |
e55222ef | 1230 | } |
e55222ef | 1231 | |
40e2e092 | 1232 | static void soc_camera_device_unregister(struct soc_camera_device *icd) |
e55222ef | 1233 | { |
e55222ef | 1234 | list_del(&icd->list); |
e55222ef | 1235 | } |
e55222ef | 1236 | |
a399810c HV |
1237 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1238 | .vidioc_querycap = soc_camera_querycap, | |
1239 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | |
1240 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | |
1241 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | |
1242 | .vidioc_enum_input = soc_camera_enum_input, | |
1243 | .vidioc_g_input = soc_camera_g_input, | |
1244 | .vidioc_s_input = soc_camera_s_input, | |
1245 | .vidioc_s_std = soc_camera_s_std, | |
1246 | .vidioc_reqbufs = soc_camera_reqbufs, | |
1247 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | |
1248 | .vidioc_querybuf = soc_camera_querybuf, | |
1249 | .vidioc_qbuf = soc_camera_qbuf, | |
1250 | .vidioc_dqbuf = soc_camera_dqbuf, | |
1251 | .vidioc_streamon = soc_camera_streamon, | |
1252 | .vidioc_streamoff = soc_camera_streamoff, | |
1253 | .vidioc_queryctrl = soc_camera_queryctrl, | |
1254 | .vidioc_g_ctrl = soc_camera_g_ctrl, | |
1255 | .vidioc_s_ctrl = soc_camera_s_ctrl, | |
1256 | .vidioc_cropcap = soc_camera_cropcap, | |
1257 | .vidioc_g_crop = soc_camera_g_crop, | |
1258 | .vidioc_s_crop = soc_camera_s_crop, | |
1259 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, | |
1260 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1261 | .vidioc_g_register = soc_camera_g_register, | |
1262 | .vidioc_s_register = soc_camera_s_register, | |
1263 | #endif | |
1264 | }; | |
1265 | ||
40e2e092 | 1266 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef GL |
1267 | { |
1268 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
40e2e092 | 1269 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 1270 | |
e55222ef | 1271 | if (!vdev) |
40e2e092 | 1272 | return -ENOMEM; |
e55222ef GL |
1273 | |
1274 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1275 | |
5e85e732 | 1276 | vdev->parent = &icd->dev; |
e55222ef GL |
1277 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1278 | vdev->fops = &soc_camera_fops; | |
a399810c | 1279 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 1280 | vdev->release = video_device_release; |
40e2e092 | 1281 | vdev->tvnorms = V4L2_STD_UNKNOWN; |
e55222ef | 1282 | |
e55222ef GL |
1283 | icd->vdev = vdev; |
1284 | ||
1285 | return 0; | |
40e2e092 | 1286 | } |
e55222ef | 1287 | |
40e2e092 | 1288 | /* |
979ea1dd | 1289 | * Called from soc_camera_probe() above (with .video_lock held???) |
40e2e092 | 1290 | */ |
979ea1dd | 1291 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 1292 | { |
979ea1dd | 1293 | int ret; |
40e2e092 GL |
1294 | |
1295 | if (!icd->dev.parent) | |
1296 | return -ENODEV; | |
1297 | ||
1298 | if (!icd->ops || | |
40e2e092 GL |
1299 | !icd->ops->query_bus_param || |
1300 | !icd->ops->set_bus_param) | |
1301 | return -EINVAL; | |
1302 | ||
46b21094 | 1303 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd GL |
1304 | if (ret < 0) { |
1305 | dev_err(&icd->dev, "video_register_device failed: %d\n", ret); | |
1306 | return ret; | |
1307 | } | |
40e2e092 | 1308 | |
979ea1dd | 1309 | return 0; |
e55222ef | 1310 | } |
e55222ef | 1311 | |
40e2e092 | 1312 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 1313 | { |
40e2e092 GL |
1314 | struct soc_camera_link *icl = pdev->dev.platform_data; |
1315 | struct soc_camera_device *icd; | |
c41debaf | 1316 | int ret; |
0fd327bd | 1317 | |
40e2e092 GL |
1318 | if (!icl) |
1319 | return -EINVAL; | |
0fd327bd | 1320 | |
40e2e092 GL |
1321 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); |
1322 | if (!icd) | |
1323 | return -ENOMEM; | |
0fd327bd | 1324 | |
40e2e092 | 1325 | icd->iface = icl->bus_id; |
979ea1dd | 1326 | icd->pdev = &pdev->dev; |
40e2e092 | 1327 | platform_set_drvdata(pdev, icd); |
0fd327bd | 1328 | |
40e2e092 GL |
1329 | ret = soc_camera_device_register(icd); |
1330 | if (ret < 0) | |
1331 | goto escdevreg; | |
0fd327bd | 1332 | |
64ff9ba5 GL |
1333 | soc_camera_device_init(&icd->dev, icl); |
1334 | ||
6a6c8786 GL |
1335 | icd->user_width = DEFAULT_WIDTH; |
1336 | icd->user_height = DEFAULT_HEIGHT; | |
1337 | ||
40e2e092 | 1338 | return 0; |
0fd327bd | 1339 | |
40e2e092 GL |
1340 | escdevreg: |
1341 | kfree(icd); | |
0fd327bd | 1342 | |
40e2e092 | 1343 | return ret; |
c41debaf | 1344 | } |
0fd327bd | 1345 | |
5d28d525 GL |
1346 | /* |
1347 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 1348 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
1349 | * been unloaded already |
1350 | */ | |
40e2e092 | 1351 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 1352 | { |
40e2e092 | 1353 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
c41debaf | 1354 | |
40e2e092 | 1355 | if (!icd) |
c41debaf GL |
1356 | return -EINVAL; |
1357 | ||
40e2e092 | 1358 | soc_camera_device_unregister(icd); |
c41debaf | 1359 | |
40e2e092 | 1360 | kfree(icd); |
c41debaf | 1361 | |
0fd327bd GL |
1362 | return 0; |
1363 | } | |
1364 | ||
1365 | static struct platform_driver __refdata soc_camera_pdrv = { | |
40e2e092 GL |
1366 | .remove = __devexit_p(soc_camera_pdrv_remove), |
1367 | .driver = { | |
1368 | .name = "soc-camera-pdrv", | |
1369 | .owner = THIS_MODULE, | |
0fd327bd GL |
1370 | }, |
1371 | }; | |
1372 | ||
e55222ef GL |
1373 | static int __init soc_camera_init(void) |
1374 | { | |
1375 | int ret = bus_register(&soc_camera_bus_type); | |
1376 | if (ret) | |
1377 | return ret; | |
1378 | ret = driver_register(&ic_drv); | |
1379 | if (ret) | |
1380 | goto edrvr; | |
e55222ef | 1381 | |
40e2e092 | 1382 | ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
0fd327bd GL |
1383 | if (ret) |
1384 | goto epdr; | |
1385 | ||
e55222ef GL |
1386 | return 0; |
1387 | ||
0fd327bd GL |
1388 | epdr: |
1389 | driver_unregister(&ic_drv); | |
e55222ef GL |
1390 | edrvr: |
1391 | bus_unregister(&soc_camera_bus_type); | |
1392 | return ret; | |
1393 | } | |
1394 | ||
1395 | static void __exit soc_camera_exit(void) | |
1396 | { | |
0fd327bd | 1397 | platform_driver_unregister(&soc_camera_pdrv); |
e55222ef GL |
1398 | driver_unregister(&ic_drv); |
1399 | bus_unregister(&soc_camera_bus_type); | |
1400 | } | |
1401 | ||
1402 | module_init(soc_camera_init); | |
1403 | module_exit(soc_camera_exit); | |
1404 | ||
1405 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1406 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1407 | MODULE_LICENSE("GPL"); | |
0fd327bd | 1408 | MODULE_ALIAS("platform:soc-camera-pdrv"); |