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> |
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 | ||
1a0063a9 GL |
355 | icd->use_count++; |
356 | ||
9dc4e48f GL |
357 | /* Now we really have to activate the camera */ |
358 | if (icd->use_count == 1) { | |
025c18a1 | 359 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
360 | struct v4l2_format f = { |
361 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
362 | .fmt.pix = { | |
6a6c8786 GL |
363 | .width = icd->user_width, |
364 | .height = icd->user_height, | |
025c18a1 | 365 | .field = icd->field, |
760697be GL |
366 | .colorspace = icd->colorspace, |
367 | .pixelformat = | |
368 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
369 | }, |
370 | }; | |
371 | ||
979ea1dd GL |
372 | if (icl->power) { |
373 | ret = icl->power(icd->pdev, 1); | |
374 | if (ret < 0) | |
375 | goto epower; | |
376 | } | |
377 | ||
378 | /* The camera could have been already on, try to reset */ | |
379 | if (icl->reset) | |
380 | icl->reset(icd->pdev); | |
381 | ||
b8d9904c | 382 | ret = ici->ops->add(icd); |
9dc4e48f GL |
383 | if (ret < 0) { |
384 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
9dc4e48f GL |
385 | goto eiciadd; |
386 | } | |
df2ed070 | 387 | |
4f9fb5ed MCC |
388 | pm_runtime_enable(&icd->vdev->dev); |
389 | ret = pm_runtime_resume(&icd->vdev->dev); | |
390 | if (ret < 0 && ret != -ENOSYS) | |
391 | goto eresume; | |
392 | ||
760697be GL |
393 | /* |
394 | * Try to configure with default parameters. Notice: this is the | |
395 | * very first open, so, we cannot race against other calls, | |
396 | * apart from someone else calling open() simultaneously, but | |
397 | * .video_lock is protecting us against it. | |
398 | */ | |
57bee29d | 399 | ret = soc_camera_set_fmt(icd, &f); |
df2ed070 GL |
400 | if (ret < 0) |
401 | goto esfmt; | |
24d8c029 GL |
402 | |
403 | ici->ops->init_videobuf(&icd->vb_vidq, icd); | |
9dc4e48f GL |
404 | } |
405 | ||
57bee29d | 406 | file->private_data = icd; |
e55222ef GL |
407 | dev_dbg(&icd->dev, "camera device open\n"); |
408 | ||
e55222ef GL |
409 | return 0; |
410 | ||
df2ed070 | 411 | /* |
4f9fb5ed | 412 | * First four errors are entered with the .video_lock held |
df2ed070 GL |
413 | * and use_count == 1 |
414 | */ | |
415 | esfmt: | |
4f9fb5ed MCC |
416 | pm_runtime_disable(&icd->vdev->dev); |
417 | eresume: | |
df2ed070 | 418 | ici->ops->remove(icd); |
9dc4e48f | 419 | eiciadd: |
979ea1dd GL |
420 | if (icl->power) |
421 | icl->power(icd->pdev, 0); | |
422 | epower: | |
c2786ad2 | 423 | icd->use_count--; |
b8d9904c | 424 | module_put(ici->ops->owner); |
57bee29d | 425 | |
e55222ef GL |
426 | return ret; |
427 | } | |
428 | ||
bec43661 | 429 | static int soc_camera_close(struct file *file) |
e55222ef | 430 | { |
57bee29d | 431 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 432 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 433 | |
9dc4e48f | 434 | icd->use_count--; |
40e2e092 | 435 | if (!icd->use_count) { |
979ea1dd GL |
436 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
437 | ||
4f9fb5ed MCC |
438 | pm_runtime_suspend(&icd->vdev->dev); |
439 | pm_runtime_disable(&icd->vdev->dev); | |
440 | ||
b8d9904c | 441 | ici->ops->remove(icd); |
4f9fb5ed | 442 | |
979ea1dd GL |
443 | if (icl->power) |
444 | icl->power(icd->pdev, 0); | |
40e2e092 | 445 | } |
025c18a1 | 446 | |
57bee29d GL |
447 | if (icd->streamer == file) |
448 | icd->streamer = NULL; | |
449 | ||
b8d9904c | 450 | module_put(ici->ops->owner); |
9dc4e48f | 451 | |
2aa58db4 | 452 | dev_dbg(&icd->dev, "camera device close\n"); |
e55222ef GL |
453 | |
454 | return 0; | |
455 | } | |
456 | ||
aba360d8 | 457 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 458 | size_t count, loff_t *ppos) |
e55222ef | 459 | { |
57bee29d | 460 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
461 | int err = -EINVAL; |
462 | ||
2aa58db4 | 463 | dev_err(&icd->dev, "camera device read not implemented\n"); |
e55222ef GL |
464 | |
465 | return err; | |
466 | } | |
467 | ||
468 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
469 | { | |
57bee29d | 470 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
471 | int err; |
472 | ||
473 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
474 | ||
57bee29d GL |
475 | if (icd->streamer != file) |
476 | return -EBUSY; | |
477 | ||
478 | err = videobuf_mmap_mapper(&icd->vb_vidq, vma); | |
e55222ef GL |
479 | |
480 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
481 | (unsigned long)vma->vm_start, | |
482 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
483 | err); | |
484 | ||
485 | return err; | |
486 | } | |
487 | ||
488 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
489 | { | |
57bee29d | 490 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 491 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 492 | |
57bee29d GL |
493 | if (icd->streamer != file) |
494 | return -EBUSY; | |
495 | ||
496 | if (list_empty(&icd->vb_vidq.stream)) { | |
e55222ef GL |
497 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); |
498 | return POLLERR; | |
499 | } | |
500 | ||
b8d9904c | 501 | return ici->ops->poll(file, pt); |
e55222ef GL |
502 | } |
503 | ||
bec43661 | 504 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
505 | .owner = THIS_MODULE, |
506 | .open = soc_camera_open, | |
507 | .release = soc_camera_close, | |
b6a633c1 | 508 | .unlocked_ioctl = video_ioctl2, |
e55222ef GL |
509 | .read = soc_camera_read, |
510 | .mmap = soc_camera_mmap, | |
511 | .poll = soc_camera_poll, | |
e55222ef GL |
512 | }; |
513 | ||
72937890 | 514 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 515 | struct v4l2_format *f) |
e55222ef | 516 | { |
57bee29d | 517 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 518 | int ret; |
e55222ef GL |
519 | |
520 | WARN_ON(priv != file->private_data); | |
521 | ||
57bee29d GL |
522 | if (icd->streamer && icd->streamer != file) |
523 | return -EBUSY; | |
1c3bb743 | 524 | |
57bee29d | 525 | if (icd->vb_vidq.bufs[0]) { |
b897a91a | 526 | dev_err(&icd->dev, "S_FMT denied: queue initialised\n"); |
b6a633c1 | 527 | return -EBUSY; |
1c3bb743 GL |
528 | } |
529 | ||
57bee29d GL |
530 | ret = soc_camera_set_fmt(icd, f); |
531 | ||
532 | if (!ret && !icd->streamer) | |
533 | icd->streamer = file; | |
1c3bb743 | 534 | |
1c3bb743 | 535 | return ret; |
e55222ef GL |
536 | } |
537 | ||
72937890 | 538 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 539 | struct v4l2_fmtdesc *f) |
e55222ef | 540 | { |
57bee29d | 541 | struct soc_camera_device *icd = file->private_data; |
760697be | 542 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
543 | |
544 | WARN_ON(priv != file->private_data); | |
545 | ||
c2786ad2 | 546 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
547 | return -EINVAL; |
548 | ||
c2786ad2 | 549 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 550 | |
760697be GL |
551 | if (format->name) |
552 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
553 | f->pixelformat = format->fourcc; |
554 | return 0; | |
555 | } | |
556 | ||
72937890 | 557 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 558 | struct v4l2_format *f) |
e55222ef | 559 | { |
57bee29d | 560 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 561 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
562 | |
563 | WARN_ON(priv != file->private_data); | |
564 | ||
6a6c8786 GL |
565 | pix->width = icd->user_width; |
566 | pix->height = icd->user_height; | |
57bee29d | 567 | pix->field = icd->vb_vidq.field; |
760697be GL |
568 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
569 | pix->bytesperline = soc_mbus_bytes_per_line(pix->width, | |
570 | icd->current_fmt->host_fmt); | |
571 | pix->colorspace = icd->colorspace; | |
572 | if (pix->bytesperline < 0) | |
573 | return pix->bytesperline; | |
64f5905e | 574 | pix->sizeimage = pix->height * pix->bytesperline; |
e55222ef | 575 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 576 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
577 | return 0; |
578 | } | |
579 | ||
580 | static int soc_camera_querycap(struct file *file, void *priv, | |
581 | struct v4l2_capability *cap) | |
582 | { | |
57bee29d | 583 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 584 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
585 | |
586 | WARN_ON(priv != file->private_data); | |
587 | ||
588 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 589 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
590 | } |
591 | ||
592 | static int soc_camera_streamon(struct file *file, void *priv, | |
593 | enum v4l2_buf_type i) | |
594 | { | |
57bee29d | 595 | struct soc_camera_device *icd = file->private_data; |
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 | ||
57bee29d GL |
604 | if (icd->streamer != file) |
605 | return -EBUSY; | |
606 | ||
c9c1f1c0 | 607 | v4l2_subdev_call(sd, video, s_stream, 1); |
e55222ef GL |
608 | |
609 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | |
57bee29d | 610 | ret = videobuf_streamon(&icd->vb_vidq); |
1c3bb743 | 611 | |
1c3bb743 | 612 | return ret; |
e55222ef GL |
613 | } |
614 | ||
615 | static int soc_camera_streamoff(struct file *file, void *priv, | |
616 | enum v4l2_buf_type i) | |
617 | { | |
57bee29d | 618 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 619 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef GL |
620 | |
621 | WARN_ON(priv != file->private_data); | |
622 | ||
e55222ef GL |
623 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
624 | return -EINVAL; | |
625 | ||
57bee29d GL |
626 | if (icd->streamer != file) |
627 | return -EBUSY; | |
628 | ||
5d28d525 GL |
629 | /* |
630 | * This calls buf_release from host driver's videobuf_queue_ops for all | |
631 | * remaining buffers. When the last buffer is freed, stop capture | |
632 | */ | |
57bee29d | 633 | videobuf_streamoff(&icd->vb_vidq); |
e55222ef | 634 | |
c9c1f1c0 | 635 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef GL |
636 | |
637 | return 0; | |
638 | } | |
639 | ||
640 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
641 | struct v4l2_queryctrl *qc) | |
642 | { | |
57bee29d | 643 | struct soc_camera_device *icd = file->private_data; |
2840d249 | 644 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
645 | int i; |
646 | ||
647 | WARN_ON(priv != file->private_data); | |
648 | ||
649 | if (!qc->id) | |
650 | return -EINVAL; | |
651 | ||
2840d249 GL |
652 | /* First check host controls */ |
653 | for (i = 0; i < ici->ops->num_controls; i++) | |
654 | if (qc->id == ici->ops->controls[i].id) { | |
655 | memcpy(qc, &(ici->ops->controls[i]), | |
656 | sizeof(*qc)); | |
657 | return 0; | |
658 | } | |
659 | ||
660 | /* Then device controls */ | |
e55222ef GL |
661 | for (i = 0; i < icd->ops->num_controls; i++) |
662 | if (qc->id == icd->ops->controls[i].id) { | |
663 | memcpy(qc, &(icd->ops->controls[i]), | |
664 | sizeof(*qc)); | |
665 | return 0; | |
666 | } | |
667 | ||
668 | return -EINVAL; | |
669 | } | |
670 | ||
671 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
672 | struct v4l2_control *ctrl) | |
673 | { | |
57bee29d | 674 | struct soc_camera_device *icd = file->private_data; |
979ea1dd | 675 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 676 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 677 | int ret; |
e55222ef GL |
678 | |
679 | WARN_ON(priv != file->private_data); | |
680 | ||
2840d249 GL |
681 | if (ici->ops->get_ctrl) { |
682 | ret = ici->ops->get_ctrl(icd, ctrl); | |
683 | if (ret != -ENOIOCTLCMD) | |
684 | return ret; | |
685 | } | |
686 | ||
c9c1f1c0 | 687 | return v4l2_subdev_call(sd, core, g_ctrl, ctrl); |
e55222ef GL |
688 | } |
689 | ||
690 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
691 | struct v4l2_control *ctrl) | |
692 | { | |
57bee29d | 693 | struct soc_camera_device *icd = file->private_data; |
979ea1dd | 694 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 695 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 696 | int ret; |
e55222ef GL |
697 | |
698 | WARN_ON(priv != file->private_data); | |
699 | ||
2840d249 GL |
700 | if (ici->ops->set_ctrl) { |
701 | ret = ici->ops->set_ctrl(icd, ctrl); | |
702 | if (ret != -ENOIOCTLCMD) | |
703 | return ret; | |
704 | } | |
705 | ||
c9c1f1c0 | 706 | return v4l2_subdev_call(sd, core, s_ctrl, ctrl); |
e55222ef GL |
707 | } |
708 | ||
709 | static int soc_camera_cropcap(struct file *file, void *fh, | |
710 | struct v4l2_cropcap *a) | |
711 | { | |
57bee29d | 712 | struct soc_camera_device *icd = file->private_data; |
6a6c8786 | 713 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 714 | |
6a6c8786 | 715 | return ici->ops->cropcap(icd, a); |
e55222ef GL |
716 | } |
717 | ||
718 | static int soc_camera_g_crop(struct file *file, void *fh, | |
719 | struct v4l2_crop *a) | |
720 | { | |
57bee29d | 721 | struct soc_camera_device *icd = file->private_data; |
6a6c8786 GL |
722 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
723 | int ret; | |
e55222ef | 724 | |
6a6c8786 | 725 | ret = ici->ops->get_crop(icd, a); |
e55222ef | 726 | |
6a6c8786 | 727 | return ret; |
e55222ef GL |
728 | } |
729 | ||
68a54f0e GL |
730 | /* |
731 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
732 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
ab56d5eb | 733 | * retrieve it. |
68a54f0e | 734 | */ |
e55222ef GL |
735 | static int soc_camera_s_crop(struct file *file, void *fh, |
736 | struct v4l2_crop *a) | |
737 | { | |
57bee29d | 738 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 739 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
6a6c8786 GL |
740 | struct v4l2_rect *rect = &a->c; |
741 | struct v4l2_crop current_crop; | |
e55222ef GL |
742 | int ret; |
743 | ||
744 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
745 | return -EINVAL; | |
746 | ||
6a6c8786 GL |
747 | dev_dbg(&icd->dev, "S_CROP(%ux%u@%u:%u)\n", |
748 | rect->width, rect->height, rect->left, rect->top); | |
749 | ||
6a6c8786 GL |
750 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
751 | ret = ici->ops->get_crop(icd, ¤t_crop); | |
752 | ||
b897a91a | 753 | /* Prohibit window size change with initialised buffers */ |
103754a0 GL |
754 | if (ret < 0) { |
755 | dev_err(&icd->dev, | |
756 | "S_CROP denied: getting current crop failed\n"); | |
57bee29d | 757 | } else if (icd->vb_vidq.bufs[0] && |
103754a0 GL |
758 | (a->c.width != current_crop.c.width || |
759 | a->c.height != current_crop.c.height)) { | |
b897a91a GL |
760 | dev_err(&icd->dev, |
761 | "S_CROP denied: queue initialised and sizes differ\n"); | |
762 | ret = -EBUSY; | |
6a6c8786 GL |
763 | } else { |
764 | ret = ici->ops->set_crop(icd, a); | |
b897a91a GL |
765 | } |
766 | ||
e55222ef GL |
767 | return ret; |
768 | } | |
769 | ||
c9f6ef69 GL |
770 | static int soc_camera_g_parm(struct file *file, void *fh, |
771 | struct v4l2_streamparm *a) | |
772 | { | |
57bee29d | 773 | struct soc_camera_device *icd = file->private_data; |
c9f6ef69 GL |
774 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
775 | ||
776 | if (ici->ops->get_parm) | |
777 | return ici->ops->get_parm(icd, a); | |
778 | ||
779 | return -ENOIOCTLCMD; | |
780 | } | |
781 | ||
782 | static int soc_camera_s_parm(struct file *file, void *fh, | |
783 | struct v4l2_streamparm *a) | |
784 | { | |
57bee29d | 785 | struct soc_camera_device *icd = file->private_data; |
c9f6ef69 GL |
786 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
787 | ||
788 | if (ici->ops->set_parm) | |
789 | return ici->ops->set_parm(icd, a); | |
790 | ||
791 | return -ENOIOCTLCMD; | |
792 | } | |
793 | ||
e55222ef | 794 | static int soc_camera_g_chip_ident(struct file *file, void *fh, |
aecde8b5 | 795 | struct v4l2_dbg_chip_ident *id) |
e55222ef | 796 | { |
57bee29d | 797 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 798 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 799 | |
c9c1f1c0 | 800 | return v4l2_subdev_call(sd, core, g_chip_ident, id); |
e55222ef GL |
801 | } |
802 | ||
803 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
804 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 805 | struct v4l2_dbg_register *reg) |
e55222ef | 806 | { |
57bee29d | 807 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 808 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 809 | |
c9c1f1c0 | 810 | return v4l2_subdev_call(sd, core, g_register, reg); |
e55222ef GL |
811 | } |
812 | ||
813 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 814 | struct v4l2_dbg_register *reg) |
e55222ef | 815 | { |
57bee29d | 816 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 817 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 818 | |
c9c1f1c0 | 819 | return v4l2_subdev_call(sd, core, s_register, reg); |
e55222ef GL |
820 | } |
821 | #endif | |
822 | ||
e55222ef GL |
823 | /* So far this function cannot fail */ |
824 | static void scan_add_host(struct soc_camera_host *ici) | |
825 | { | |
826 | struct soc_camera_device *icd; | |
827 | ||
828 | mutex_lock(&list_lock); | |
829 | ||
830 | list_for_each_entry(icd, &devices, list) { | |
831 | if (icd->iface == ici->nr) { | |
40e2e092 | 832 | int ret; |
979ea1dd | 833 | icd->dev.parent = ici->v4l2_dev.dev; |
40e2e092 GL |
834 | dev_set_name(&icd->dev, "%u-%u", icd->iface, |
835 | icd->devnum); | |
836 | ret = device_register(&icd->dev); | |
837 | if (ret < 0) { | |
838 | icd->dev.parent = NULL; | |
839 | dev_err(&icd->dev, | |
840 | "Cannot register device: %d\n", ret); | |
841 | } | |
e55222ef GL |
842 | } |
843 | } | |
844 | ||
845 | mutex_unlock(&list_lock); | |
846 | } | |
847 | ||
40e2e092 GL |
848 | #ifdef CONFIG_I2C_BOARDINFO |
849 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | |
850 | struct soc_camera_link *icl) | |
e55222ef | 851 | { |
40e2e092 | 852 | struct i2c_client *client; |
979ea1dd | 853 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
40e2e092 | 854 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); |
979ea1dd | 855 | struct v4l2_subdev *subdev; |
e55222ef | 856 | |
40e2e092 | 857 | if (!adap) { |
40e2e092 GL |
858 | dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n", |
859 | icl->i2c_adapter_id); | |
860 | goto ei2cga; | |
861 | } | |
e55222ef | 862 | |
40e2e092 | 863 | icl->board_info->platform_data = icd; |
e55222ef | 864 | |
979ea1dd | 865 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
9a1f8b34 | 866 | icl->board_info, NULL); |
d74f841c | 867 | if (!subdev) |
40e2e092 | 868 | goto ei2cnd; |
e55222ef | 869 | |
c4ce6d14 | 870 | client = v4l2_get_subdevdata(subdev); |
979ea1dd | 871 | |
40e2e092 GL |
872 | /* Use to_i2c_client(dev) to recover the i2c client */ |
873 | dev_set_drvdata(&icd->dev, &client->dev); | |
e55222ef | 874 | |
40e2e092 GL |
875 | return 0; |
876 | ei2cnd: | |
877 | i2c_put_adapter(adap); | |
878 | ei2cga: | |
d74f841c | 879 | return -ENODEV; |
e55222ef GL |
880 | } |
881 | ||
40e2e092 GL |
882 | static void soc_camera_free_i2c(struct soc_camera_device *icd) |
883 | { | |
884 | struct i2c_client *client = | |
885 | to_i2c_client(to_soc_camera_control(icd)); | |
886 | dev_set_drvdata(&icd->dev, NULL); | |
979ea1dd | 887 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 GL |
888 | i2c_unregister_device(client); |
889 | i2c_put_adapter(client->adapter); | |
890 | } | |
891 | #else | |
892 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | |
893 | #define soc_camera_free_i2c(icd) do {} while (0) | |
894 | #endif | |
895 | ||
979ea1dd | 896 | static int soc_camera_video_start(struct soc_camera_device *icd); |
40e2e092 GL |
897 | static int video_dev_create(struct soc_camera_device *icd); |
898 | /* Called during host-driver probe */ | |
e55222ef GL |
899 | static int soc_camera_probe(struct device *dev) |
900 | { | |
901 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
979ea1dd | 902 | struct soc_camera_host *ici = to_soc_camera_host(dev->parent); |
40e2e092 | 903 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
979ea1dd | 904 | struct device *control = NULL; |
6a6c8786 | 905 | struct v4l2_subdev *sd; |
760697be | 906 | struct v4l2_mbus_framefmt mf; |
e55222ef GL |
907 | int ret; |
908 | ||
40e2e092 | 909 | dev_info(dev, "Probing %s\n", dev_name(dev)); |
1c3bb743 | 910 | |
979ea1dd GL |
911 | if (icl->power) { |
912 | ret = icl->power(icd->pdev, 1); | |
913 | if (ret < 0) { | |
914 | dev_err(dev, | |
915 | "Platform failed to power-on the camera.\n"); | |
916 | goto epower; | |
917 | } | |
918 | } | |
919 | ||
920 | /* The camera could have been already on, try to reset */ | |
921 | if (icl->reset) | |
922 | icl->reset(icd->pdev); | |
923 | ||
924 | ret = ici->ops->add(icd); | |
925 | if (ret < 0) | |
926 | goto eadd; | |
927 | ||
928 | /* Must have icd->vdev before registering the device */ | |
40e2e092 GL |
929 | ret = video_dev_create(icd); |
930 | if (ret < 0) | |
931 | goto evdc; | |
1c3bb743 | 932 | |
40e2e092 GL |
933 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
934 | if (icl->board_info) { | |
935 | ret = soc_camera_init_i2c(icd, icl); | |
936 | if (ret < 0) | |
937 | goto eadddev; | |
938 | } else if (!icl->add_device || !icl->del_device) { | |
1c3bb743 | 939 | ret = -EINVAL; |
40e2e092 GL |
940 | goto eadddev; |
941 | } else { | |
979ea1dd GL |
942 | if (icl->module_name) |
943 | ret = request_module(icl->module_name); | |
944 | ||
40e2e092 GL |
945 | ret = icl->add_device(icl, &icd->dev); |
946 | if (ret < 0) | |
947 | goto eadddev; | |
1c3bb743 | 948 | |
96c75399 GL |
949 | /* |
950 | * FIXME: this is racy, have to use driver-binding notification, | |
951 | * when it is available | |
952 | */ | |
979ea1dd | 953 | control = to_soc_camera_control(icd); |
08590b96 | 954 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd GL |
955 | !try_module_get(control->driver->owner)) { |
956 | icl->del_device(icl); | |
957 | goto enodrv; | |
958 | } | |
40e2e092 | 959 | } |
e55222ef | 960 | |
fa48984e GL |
961 | /* At this point client .probe() should have run already */ |
962 | ret = soc_camera_init_user_formats(icd); | |
963 | if (ret < 0) | |
964 | goto eiufmt; | |
965 | ||
fa48984e GL |
966 | icd->field = V4L2_FIELD_ANY; |
967 | ||
b6a633c1 GL |
968 | icd->vdev->lock = &icd->video_lock; |
969 | ||
970 | /* | |
971 | * ..._video_start() will create a device node, video_register_device() | |
972 | * itself is protected against concurrent open() calls, but we also have | |
973 | * to protect our data. | |
974 | */ | |
979ea1dd GL |
975 | mutex_lock(&icd->video_lock); |
976 | ||
977 | ret = soc_camera_video_start(icd); | |
978 | if (ret < 0) | |
979 | goto evidstart; | |
980 | ||
6a6c8786 GL |
981 | /* Try to improve our guess of a reasonable window format */ |
982 | sd = soc_camera_to_subdev(icd); | |
760697be GL |
983 | if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { |
984 | icd->user_width = mf.width; | |
985 | icd->user_height = mf.height; | |
986 | icd->colorspace = mf.colorspace; | |
987 | icd->field = mf.field; | |
6a6c8786 GL |
988 | } |
989 | ||
40e2e092 | 990 | /* Do we have to sysfs_remove_link() before device_unregister()? */ |
6a6c8786 | 991 | if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj, |
40e2e092 GL |
992 | "control")) |
993 | dev_warn(&icd->dev, "Failed creating the control symlink\n"); | |
025c18a1 | 994 | |
979ea1dd GL |
995 | ici->ops->remove(icd); |
996 | ||
997 | if (icl->power) | |
998 | icl->power(icd->pdev, 0); | |
999 | ||
1000 | mutex_unlock(&icd->video_lock); | |
025c18a1 | 1001 | |
40e2e092 | 1002 | return 0; |
e55222ef | 1003 | |
979ea1dd GL |
1004 | evidstart: |
1005 | mutex_unlock(&icd->video_lock); | |
fa48984e GL |
1006 | soc_camera_free_user_formats(icd); |
1007 | eiufmt: | |
979ea1dd | 1008 | if (icl->board_info) { |
40e2e092 | 1009 | soc_camera_free_i2c(icd); |
979ea1dd | 1010 | } else { |
40e2e092 | 1011 | icl->del_device(icl); |
979ea1dd GL |
1012 | module_put(control->driver->owner); |
1013 | } | |
1014 | enodrv: | |
40e2e092 GL |
1015 | eadddev: |
1016 | video_device_release(icd->vdev); | |
1017 | evdc: | |
979ea1dd GL |
1018 | ici->ops->remove(icd); |
1019 | eadd: | |
1020 | if (icl->power) | |
1021 | icl->power(icd->pdev, 0); | |
1022 | epower: | |
e55222ef GL |
1023 | return ret; |
1024 | } | |
1025 | ||
5d28d525 GL |
1026 | /* |
1027 | * This is called on device_unregister, which only means we have to disconnect | |
1028 | * from the host, but not remove ourselves from the device list | |
1029 | */ | |
e55222ef GL |
1030 | static int soc_camera_remove(struct device *dev) |
1031 | { | |
1032 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
40e2e092 GL |
1033 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
1034 | struct video_device *vdev = icd->vdev; | |
e55222ef | 1035 | |
40e2e092 | 1036 | BUG_ON(!dev->parent); |
e55222ef | 1037 | |
40e2e092 | 1038 | if (vdev) { |
40e2e092 GL |
1039 | video_unregister_device(vdev); |
1040 | icd->vdev = NULL; | |
40e2e092 GL |
1041 | } |
1042 | ||
979ea1dd | 1043 | if (icl->board_info) { |
40e2e092 | 1044 | soc_camera_free_i2c(icd); |
979ea1dd GL |
1045 | } else { |
1046 | struct device_driver *drv = to_soc_camera_control(icd) ? | |
1047 | to_soc_camera_control(icd)->driver : NULL; | |
1048 | if (drv) { | |
1049 | icl->del_device(icl); | |
1050 | module_put(drv->owner); | |
1051 | } | |
1052 | } | |
fa48984e | 1053 | soc_camera_free_user_formats(icd); |
025c18a1 | 1054 | |
e55222ef GL |
1055 | return 0; |
1056 | } | |
1057 | ||
2e521061 RJ |
1058 | static int soc_camera_suspend(struct device *dev, pm_message_t state) |
1059 | { | |
1060 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1061 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1062 | int ret = 0; | |
1063 | ||
1064 | if (ici->ops->suspend) | |
1065 | ret = ici->ops->suspend(icd, state); | |
1066 | ||
1067 | return ret; | |
1068 | } | |
1069 | ||
1070 | static int soc_camera_resume(struct device *dev) | |
1071 | { | |
1072 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1073 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1074 | int ret = 0; | |
1075 | ||
1076 | if (ici->ops->resume) | |
1077 | ret = ici->ops->resume(icd); | |
1078 | ||
1079 | return ret; | |
1080 | } | |
1081 | ||
52d268a3 | 1082 | struct bus_type soc_camera_bus_type = { |
e55222ef GL |
1083 | .name = "soc-camera", |
1084 | .probe = soc_camera_probe, | |
1085 | .remove = soc_camera_remove, | |
2e521061 RJ |
1086 | .suspend = soc_camera_suspend, |
1087 | .resume = soc_camera_resume, | |
e55222ef | 1088 | }; |
52d268a3 | 1089 | EXPORT_SYMBOL_GPL(soc_camera_bus_type); |
e55222ef GL |
1090 | |
1091 | static struct device_driver ic_drv = { | |
1092 | .name = "camera", | |
1093 | .bus = &soc_camera_bus_type, | |
1094 | .owner = THIS_MODULE, | |
1095 | }; | |
1096 | ||
e55222ef GL |
1097 | static void dummy_release(struct device *dev) |
1098 | { | |
1099 | } | |
1100 | ||
6a6c8786 GL |
1101 | static int default_cropcap(struct soc_camera_device *icd, |
1102 | struct v4l2_cropcap *a) | |
1103 | { | |
1104 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1105 | return v4l2_subdev_call(sd, video, cropcap, a); | |
1106 | } | |
1107 | ||
1108 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1109 | { | |
1110 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1111 | return v4l2_subdev_call(sd, video, g_crop, a); | |
1112 | } | |
1113 | ||
1114 | static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1115 | { | |
1116 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1117 | return v4l2_subdev_call(sd, video, s_crop, a); | |
1118 | } | |
1119 | ||
06e17821 JK |
1120 | static int default_g_parm(struct soc_camera_device *icd, |
1121 | struct v4l2_streamparm *parm) | |
1122 | { | |
1123 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1124 | return v4l2_subdev_call(sd, video, g_parm, parm); | |
1125 | } | |
1126 | ||
1127 | static int default_s_parm(struct soc_camera_device *icd, | |
1128 | struct v4l2_streamparm *parm) | |
1129 | { | |
1130 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1131 | return v4l2_subdev_call(sd, video, s_parm, parm); | |
1132 | } | |
1133 | ||
64ff9ba5 GL |
1134 | static void soc_camera_device_init(struct device *dev, void *pdata) |
1135 | { | |
1136 | dev->platform_data = pdata; | |
1137 | dev->bus = &soc_camera_bus_type; | |
1138 | dev->release = dummy_release; | |
1139 | } | |
1140 | ||
b8d9904c | 1141 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1142 | { |
e55222ef | 1143 | struct soc_camera_host *ix; |
979ea1dd | 1144 | int ret; |
e55222ef | 1145 | |
64f5905e GL |
1146 | if (!ici || !ici->ops || |
1147 | !ici->ops->try_fmt || | |
1148 | !ici->ops->set_fmt || | |
1149 | !ici->ops->set_bus_param || | |
1150 | !ici->ops->querycap || | |
1151 | !ici->ops->init_videobuf || | |
1152 | !ici->ops->reqbufs || | |
1153 | !ici->ops->add || | |
1154 | !ici->ops->remove || | |
eff505fa | 1155 | !ici->ops->poll || |
979ea1dd | 1156 | !ici->v4l2_dev.dev) |
e55222ef GL |
1157 | return -EINVAL; |
1158 | ||
6a6c8786 GL |
1159 | if (!ici->ops->set_crop) |
1160 | ici->ops->set_crop = default_s_crop; | |
1161 | if (!ici->ops->get_crop) | |
1162 | ici->ops->get_crop = default_g_crop; | |
1163 | if (!ici->ops->cropcap) | |
1164 | ici->ops->cropcap = default_cropcap; | |
06e17821 JK |
1165 | if (!ici->ops->set_parm) |
1166 | ici->ops->set_parm = default_s_parm; | |
1167 | if (!ici->ops->get_parm) | |
1168 | ici->ops->get_parm = default_g_parm; | |
6a6c8786 | 1169 | |
e55222ef GL |
1170 | mutex_lock(&list_lock); |
1171 | list_for_each_entry(ix, &hosts, list) { | |
1172 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1173 | ret = -EBUSY; |
1174 | goto edevreg; | |
e55222ef GL |
1175 | } |
1176 | } | |
1177 | ||
979ea1dd GL |
1178 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1179 | if (ret < 0) | |
1180 | goto edevreg; | |
eff505fa | 1181 | |
e55222ef GL |
1182 | list_add_tail(&ici->list, &hosts); |
1183 | mutex_unlock(&list_lock); | |
1184 | ||
e55222ef GL |
1185 | scan_add_host(ici); |
1186 | ||
1187 | return 0; | |
979ea1dd GL |
1188 | |
1189 | edevreg: | |
1190 | mutex_unlock(&list_lock); | |
1191 | return ret; | |
e55222ef GL |
1192 | } |
1193 | EXPORT_SYMBOL(soc_camera_host_register); | |
1194 | ||
1195 | /* Unregister all clients! */ | |
1196 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1197 | { | |
1198 | struct soc_camera_device *icd; | |
1199 | ||
1200 | mutex_lock(&list_lock); | |
1201 | ||
1202 | list_del(&ici->list); | |
1203 | ||
1204 | list_for_each_entry(icd, &devices, list) { | |
979ea1dd | 1205 | if (icd->iface == ici->nr) { |
64ff9ba5 | 1206 | void *pdata = icd->dev.platform_data; |
40e2e092 | 1207 | /* The bus->remove will be called */ |
e55222ef | 1208 | device_unregister(&icd->dev); |
76823b79 GL |
1209 | /* |
1210 | * Not before device_unregister(), .remove | |
1211 | * needs parent to call ici->ops->remove(). | |
1212 | * If the host module is loaded again, device_register() | |
1213 | * would complain "already initialised," since 2.6.32 | |
1214 | * this is also needed to prevent use-after-free of the | |
1215 | * device private data. | |
1216 | */ | |
1217 | memset(&icd->dev, 0, sizeof(icd->dev)); | |
64ff9ba5 | 1218 | soc_camera_device_init(&icd->dev, pdata); |
e55222ef GL |
1219 | } |
1220 | } | |
1221 | ||
1222 | mutex_unlock(&list_lock); | |
1223 | ||
979ea1dd | 1224 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1225 | } |
1226 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1227 | ||
1228 | /* Image capture device */ | |
40e2e092 | 1229 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1230 | { |
1231 | struct soc_camera_device *ix; | |
1232 | int num = -1, i; | |
1233 | ||
e55222ef GL |
1234 | for (i = 0; i < 256 && num < 0; i++) { |
1235 | num = i; | |
40e2e092 | 1236 | /* Check if this index is available on this interface */ |
e55222ef GL |
1237 | list_for_each_entry(ix, &devices, list) { |
1238 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1239 | num = -1; | |
1240 | break; | |
1241 | } | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | if (num < 0) | |
5d28d525 GL |
1246 | /* |
1247 | * ok, we have 256 cameras on this host... | |
1248 | * man, stay reasonable... | |
1249 | */ | |
e55222ef GL |
1250 | return -ENOMEM; |
1251 | ||
64ff9ba5 | 1252 | icd->devnum = num; |
64f5905e GL |
1253 | icd->use_count = 0; |
1254 | icd->host_priv = NULL; | |
1c3bb743 | 1255 | mutex_init(&icd->video_lock); |
e55222ef | 1256 | |
40e2e092 GL |
1257 | list_add_tail(&icd->list, &devices); |
1258 | ||
1259 | return 0; | |
e55222ef | 1260 | } |
e55222ef | 1261 | |
40e2e092 | 1262 | static void soc_camera_device_unregister(struct soc_camera_device *icd) |
e55222ef | 1263 | { |
e55222ef | 1264 | list_del(&icd->list); |
e55222ef | 1265 | } |
e55222ef | 1266 | |
a399810c HV |
1267 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1268 | .vidioc_querycap = soc_camera_querycap, | |
1269 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | |
1270 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | |
1271 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | |
1272 | .vidioc_enum_input = soc_camera_enum_input, | |
1273 | .vidioc_g_input = soc_camera_g_input, | |
1274 | .vidioc_s_input = soc_camera_s_input, | |
1275 | .vidioc_s_std = soc_camera_s_std, | |
1276 | .vidioc_reqbufs = soc_camera_reqbufs, | |
1277 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | |
1278 | .vidioc_querybuf = soc_camera_querybuf, | |
1279 | .vidioc_qbuf = soc_camera_qbuf, | |
1280 | .vidioc_dqbuf = soc_camera_dqbuf, | |
1281 | .vidioc_streamon = soc_camera_streamon, | |
1282 | .vidioc_streamoff = soc_camera_streamoff, | |
1283 | .vidioc_queryctrl = soc_camera_queryctrl, | |
1284 | .vidioc_g_ctrl = soc_camera_g_ctrl, | |
1285 | .vidioc_s_ctrl = soc_camera_s_ctrl, | |
1286 | .vidioc_cropcap = soc_camera_cropcap, | |
1287 | .vidioc_g_crop = soc_camera_g_crop, | |
1288 | .vidioc_s_crop = soc_camera_s_crop, | |
c9f6ef69 GL |
1289 | .vidioc_g_parm = soc_camera_g_parm, |
1290 | .vidioc_s_parm = soc_camera_s_parm, | |
a399810c HV |
1291 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, |
1292 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1293 | .vidioc_g_register = soc_camera_g_register, | |
1294 | .vidioc_s_register = soc_camera_s_register, | |
1295 | #endif | |
1296 | }; | |
1297 | ||
40e2e092 | 1298 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef GL |
1299 | { |
1300 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
40e2e092 | 1301 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 1302 | |
e55222ef | 1303 | if (!vdev) |
40e2e092 | 1304 | return -ENOMEM; |
e55222ef GL |
1305 | |
1306 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1307 | |
5e85e732 | 1308 | vdev->parent = &icd->dev; |
e55222ef GL |
1309 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1310 | vdev->fops = &soc_camera_fops; | |
a399810c | 1311 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 1312 | vdev->release = video_device_release; |
40e2e092 | 1313 | vdev->tvnorms = V4L2_STD_UNKNOWN; |
e55222ef | 1314 | |
e55222ef GL |
1315 | icd->vdev = vdev; |
1316 | ||
1317 | return 0; | |
40e2e092 | 1318 | } |
e55222ef | 1319 | |
40e2e092 | 1320 | /* |
979ea1dd | 1321 | * Called from soc_camera_probe() above (with .video_lock held???) |
40e2e092 | 1322 | */ |
979ea1dd | 1323 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 1324 | { |
4f9fb5ed | 1325 | struct device_type *type = icd->vdev->dev.type; |
979ea1dd | 1326 | int ret; |
40e2e092 GL |
1327 | |
1328 | if (!icd->dev.parent) | |
1329 | return -ENODEV; | |
1330 | ||
1331 | if (!icd->ops || | |
40e2e092 GL |
1332 | !icd->ops->query_bus_param || |
1333 | !icd->ops->set_bus_param) | |
1334 | return -EINVAL; | |
1335 | ||
46b21094 | 1336 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd GL |
1337 | if (ret < 0) { |
1338 | dev_err(&icd->dev, "video_register_device failed: %d\n", ret); | |
1339 | return ret; | |
1340 | } | |
40e2e092 | 1341 | |
4f9fb5ed MCC |
1342 | /* Restore device type, possibly set by the subdevice driver */ |
1343 | icd->vdev->dev.type = type; | |
1344 | ||
979ea1dd | 1345 | return 0; |
e55222ef | 1346 | } |
e55222ef | 1347 | |
40e2e092 | 1348 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 1349 | { |
40e2e092 GL |
1350 | struct soc_camera_link *icl = pdev->dev.platform_data; |
1351 | struct soc_camera_device *icd; | |
c41debaf | 1352 | int ret; |
0fd327bd | 1353 | |
40e2e092 GL |
1354 | if (!icl) |
1355 | return -EINVAL; | |
0fd327bd | 1356 | |
40e2e092 GL |
1357 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); |
1358 | if (!icd) | |
1359 | return -ENOMEM; | |
0fd327bd | 1360 | |
40e2e092 | 1361 | icd->iface = icl->bus_id; |
979ea1dd | 1362 | icd->pdev = &pdev->dev; |
40e2e092 | 1363 | platform_set_drvdata(pdev, icd); |
0fd327bd | 1364 | |
40e2e092 GL |
1365 | ret = soc_camera_device_register(icd); |
1366 | if (ret < 0) | |
1367 | goto escdevreg; | |
0fd327bd | 1368 | |
64ff9ba5 GL |
1369 | soc_camera_device_init(&icd->dev, icl); |
1370 | ||
6a6c8786 GL |
1371 | icd->user_width = DEFAULT_WIDTH; |
1372 | icd->user_height = DEFAULT_HEIGHT; | |
1373 | ||
40e2e092 | 1374 | return 0; |
0fd327bd | 1375 | |
40e2e092 GL |
1376 | escdevreg: |
1377 | kfree(icd); | |
0fd327bd | 1378 | |
40e2e092 | 1379 | return ret; |
c41debaf | 1380 | } |
0fd327bd | 1381 | |
5d28d525 GL |
1382 | /* |
1383 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 1384 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
1385 | * been unloaded already |
1386 | */ | |
40e2e092 | 1387 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 1388 | { |
40e2e092 | 1389 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
c41debaf | 1390 | |
40e2e092 | 1391 | if (!icd) |
c41debaf GL |
1392 | return -EINVAL; |
1393 | ||
40e2e092 | 1394 | soc_camera_device_unregister(icd); |
c41debaf | 1395 | |
40e2e092 | 1396 | kfree(icd); |
c41debaf | 1397 | |
0fd327bd GL |
1398 | return 0; |
1399 | } | |
1400 | ||
1401 | static struct platform_driver __refdata soc_camera_pdrv = { | |
40e2e092 GL |
1402 | .remove = __devexit_p(soc_camera_pdrv_remove), |
1403 | .driver = { | |
1404 | .name = "soc-camera-pdrv", | |
1405 | .owner = THIS_MODULE, | |
0fd327bd GL |
1406 | }, |
1407 | }; | |
1408 | ||
e55222ef GL |
1409 | static int __init soc_camera_init(void) |
1410 | { | |
1411 | int ret = bus_register(&soc_camera_bus_type); | |
1412 | if (ret) | |
1413 | return ret; | |
1414 | ret = driver_register(&ic_drv); | |
1415 | if (ret) | |
1416 | goto edrvr; | |
e55222ef | 1417 | |
40e2e092 | 1418 | ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
0fd327bd GL |
1419 | if (ret) |
1420 | goto epdr; | |
1421 | ||
e55222ef GL |
1422 | return 0; |
1423 | ||
0fd327bd GL |
1424 | epdr: |
1425 | driver_unregister(&ic_drv); | |
e55222ef GL |
1426 | edrvr: |
1427 | bus_unregister(&soc_camera_bus_type); | |
1428 | return ret; | |
1429 | } | |
1430 | ||
1431 | static void __exit soc_camera_exit(void) | |
1432 | { | |
0fd327bd | 1433 | platform_driver_unregister(&soc_camera_pdrv); |
e55222ef GL |
1434 | driver_unregister(&ic_drv); |
1435 | bus_unregister(&soc_camera_bus_type); | |
1436 | } | |
1437 | ||
1438 | module_init(soc_camera_init); | |
1439 | module_exit(soc_camera_exit); | |
1440 | ||
1441 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1442 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1443 | MODULE_LICENSE("GPL"); | |
0fd327bd | 1444 | MODULE_ALIAS("platform:soc-camera-pdrv"); |