Commit | Line | Data |
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e55222ef GL |
1 | /* |
2 | * camera image capture (abstract) bus driver | |
3 | * | |
4 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
5 | * | |
6 | * This driver provides an interface between platform-specific camera | |
7 | * busses and camera devices. It should be used if the camera is | |
8 | * connected not over a "proper" bus like PCI or USB, but over a | |
9 | * special bus, like, for example, the Quick Capture interface on PXA270 | |
10 | * SoCs. Later it should also be used for i.MX31 SoCs from Freescale. | |
11 | * It can handle multiple cameras and / or multiple busses, which can | |
12 | * be used, e.g., in stereo-vision applications. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | */ | |
18 | ||
e55222ef | 19 | #include <linux/device.h> |
e55222ef | 20 | #include <linux/err.h> |
0fd327bd GL |
21 | #include <linux/i2c.h> |
22 | #include <linux/init.h> | |
23 | #include <linux/list.h> | |
e55222ef | 24 | #include <linux/mutex.h> |
40e2e092 | 25 | #include <linux/module.h> |
0fd327bd | 26 | #include <linux/platform_device.h> |
96e442c1 | 27 | #include <linux/regulator/consumer.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
4f9fb5ed | 29 | #include <linux/pm_runtime.h> |
e55222ef GL |
30 | #include <linux/vmalloc.h> |
31 | ||
0fd327bd | 32 | #include <media/soc_camera.h> |
e55222ef | 33 | #include <media/v4l2-common.h> |
0fd327bd | 34 | #include <media/v4l2-ioctl.h> |
40e2e092 | 35 | #include <media/v4l2-dev.h> |
092d3921 | 36 | #include <media/videobuf-core.h> |
592c2aba | 37 | #include <media/videobuf2-core.h> |
760697be | 38 | #include <media/soc_mediabus.h> |
e55222ef | 39 | |
df2ed070 GL |
40 | /* Default to VGA resolution */ |
41 | #define DEFAULT_WIDTH 640 | |
42 | #define DEFAULT_HEIGHT 480 | |
43 | ||
e55222ef GL |
44 | static LIST_HEAD(hosts); |
45 | static LIST_HEAD(devices); | |
40e2e092 | 46 | static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ |
e55222ef | 47 | |
96e442c1 AP |
48 | static int soc_camera_power_set(struct soc_camera_device *icd, |
49 | struct soc_camera_link *icl, | |
50 | int power_on) | |
51 | { | |
52 | int ret; | |
53 | ||
54 | if (power_on) { | |
55 | ret = regulator_bulk_enable(icl->num_regulators, | |
56 | icl->regulators); | |
57 | if (ret < 0) { | |
58 | dev_err(&icd->dev, "Cannot enable regulators\n"); | |
59 | return ret; | |
60 | } | |
61 | ||
62 | if (icl->power) | |
63 | ret = icl->power(icd->pdev, power_on); | |
64 | if (ret < 0) { | |
65 | dev_err(&icd->dev, | |
66 | "Platform failed to power-on the camera.\n"); | |
67 | ||
68 | regulator_bulk_disable(icl->num_regulators, | |
69 | icl->regulators); | |
70 | return ret; | |
71 | } | |
72 | } else { | |
73 | ret = 0; | |
74 | if (icl->power) | |
75 | ret = icl->power(icd->pdev, 0); | |
76 | if (ret < 0) { | |
77 | dev_err(&icd->dev, | |
78 | "Platform failed to power-off the camera.\n"); | |
79 | return ret; | |
80 | } | |
81 | ||
82 | ret = regulator_bulk_disable(icl->num_regulators, | |
83 | icl->regulators); | |
84 | if (ret < 0) { | |
85 | dev_err(&icd->dev, "Cannot disable regulators\n"); | |
86 | return ret; | |
87 | } | |
88 | } | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
c2786ad2 GL |
93 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
94 | struct soc_camera_device *icd, unsigned int fourcc) | |
95 | { | |
96 | unsigned int i; | |
97 | ||
98 | for (i = 0; i < icd->num_user_formats; i++) | |
99 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
100 | return icd->user_formats + i; | |
101 | return NULL; | |
102 | } | |
103 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
104 | ||
bd73b36f GL |
105 | /** |
106 | * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
107 | * @icl: camera platform parameters | |
108 | * @flags: flags to be inverted according to platform configuration | |
109 | * @return: resulting flags | |
110 | */ | |
111 | unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, | |
112 | unsigned long flags) | |
113 | { | |
114 | unsigned long f; | |
115 | ||
116 | /* If only one of the two polarities is supported, switch to the opposite */ | |
117 | if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { | |
118 | f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); | |
119 | if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) | |
120 | flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; | |
121 | } | |
122 | ||
123 | if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { | |
124 | f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); | |
125 | if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) | |
126 | flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; | |
127 | } | |
128 | ||
129 | if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { | |
130 | f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); | |
131 | if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) | |
132 | flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; | |
133 | } | |
134 | ||
135 | return flags; | |
136 | } | |
137 | EXPORT_SYMBOL(soc_camera_apply_sensor_flags); | |
138 | ||
dca6b6d1 SA |
139 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
140 | ((x) >> 24) & 0xff | |
141 | ||
142 | static int soc_camera_try_fmt(struct soc_camera_device *icd, | |
143 | struct v4l2_format *f) | |
144 | { | |
145 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
146 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
147 | int ret; | |
148 | ||
149 | dev_dbg(&icd->dev, "TRY_FMT(%c%c%c%c, %ux%u)\n", | |
150 | pixfmtstr(pix->pixelformat), pix->width, pix->height); | |
151 | ||
152 | pix->bytesperline = 0; | |
153 | pix->sizeimage = 0; | |
154 | ||
155 | ret = ici->ops->try_fmt(icd, f); | |
156 | if (ret < 0) | |
157 | return ret; | |
158 | ||
159 | if (!pix->sizeimage) { | |
160 | if (!pix->bytesperline) { | |
161 | const struct soc_camera_format_xlate *xlate; | |
162 | ||
163 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | |
164 | if (!xlate) | |
165 | return -EINVAL; | |
166 | ||
167 | ret = soc_mbus_bytes_per_line(pix->width, | |
168 | xlate->host_fmt); | |
169 | if (ret > 0) | |
170 | pix->bytesperline = ret; | |
171 | } | |
172 | if (pix->bytesperline) | |
173 | pix->sizeimage = pix->bytesperline * pix->height; | |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
72937890 | 179 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 180 | struct v4l2_format *f) |
e55222ef | 181 | { |
57bee29d | 182 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
183 | |
184 | WARN_ON(priv != file->private_data); | |
185 | ||
d366d4a0 GL |
186 | /* Only single-plane capture is supported so far */ |
187 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
188 | return -EINVAL; | |
189 | ||
ad5f2e85 | 190 | /* limit format to hardware capabilities */ |
dca6b6d1 | 191 | return soc_camera_try_fmt(icd, f); |
e55222ef GL |
192 | } |
193 | ||
194 | static int soc_camera_enum_input(struct file *file, void *priv, | |
195 | struct v4l2_input *inp) | |
196 | { | |
57bee29d | 197 | struct soc_camera_device *icd = file->private_data; |
34d359db KM |
198 | int ret = 0; |
199 | ||
e55222ef GL |
200 | if (inp->index != 0) |
201 | return -EINVAL; | |
202 | ||
34d359db KM |
203 | if (icd->ops->enum_input) |
204 | ret = icd->ops->enum_input(icd, inp); | |
205 | else { | |
206 | /* default is camera */ | |
207 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
208 | inp->std = V4L2_STD_UNKNOWN; | |
209 | strcpy(inp->name, "Camera"); | |
210 | } | |
e55222ef | 211 | |
34d359db | 212 | return ret; |
e55222ef GL |
213 | } |
214 | ||
215 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
216 | { | |
217 | *i = 0; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
223 | { | |
224 | if (i > 0) | |
225 | return -EINVAL; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | |
231 | { | |
57bee29d | 232 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 233 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 234 | |
c9c1f1c0 | 235 | return v4l2_subdev_call(sd, core, s_std, *a); |
e55222ef GL |
236 | } |
237 | ||
ed5b65dc QX |
238 | static int soc_camera_enum_fsizes(struct file *file, void *fh, |
239 | struct v4l2_frmsizeenum *fsize) | |
240 | { | |
241 | struct soc_camera_device *icd = file->private_data; | |
242 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
243 | ||
244 | return ici->ops->enum_fsizes(icd, fsize); | |
245 | } | |
246 | ||
e55222ef GL |
247 | static int soc_camera_reqbufs(struct file *file, void *priv, |
248 | struct v4l2_requestbuffers *p) | |
249 | { | |
250 | int ret; | |
57bee29d | 251 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 252 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
253 | |
254 | WARN_ON(priv != file->private_data); | |
255 | ||
57bee29d GL |
256 | if (icd->streamer && icd->streamer != file) |
257 | return -EBUSY; | |
258 | ||
592c2aba GL |
259 | if (ici->ops->init_videobuf) { |
260 | ret = videobuf_reqbufs(&icd->vb_vidq, p); | |
261 | if (ret < 0) | |
262 | return ret; | |
263 | ||
264 | ret = ici->ops->reqbufs(icd, p); | |
265 | } else { | |
266 | ret = vb2_reqbufs(&icd->vb2_vidq, p); | |
267 | } | |
e55222ef | 268 | |
57bee29d GL |
269 | if (!ret && !icd->streamer) |
270 | icd->streamer = file; | |
271 | ||
272 | return ret; | |
e55222ef GL |
273 | } |
274 | ||
275 | static int soc_camera_querybuf(struct file *file, void *priv, | |
276 | struct v4l2_buffer *p) | |
277 | { | |
57bee29d | 278 | struct soc_camera_device *icd = file->private_data; |
592c2aba | 279 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
280 | |
281 | WARN_ON(priv != file->private_data); | |
282 | ||
592c2aba GL |
283 | if (ici->ops->init_videobuf) |
284 | return videobuf_querybuf(&icd->vb_vidq, p); | |
285 | else | |
286 | return vb2_querybuf(&icd->vb2_vidq, p); | |
e55222ef GL |
287 | } |
288 | ||
289 | static int soc_camera_qbuf(struct file *file, void *priv, | |
290 | struct v4l2_buffer *p) | |
291 | { | |
57bee29d | 292 | struct soc_camera_device *icd = file->private_data; |
592c2aba | 293 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
294 | |
295 | WARN_ON(priv != file->private_data); | |
296 | ||
57bee29d GL |
297 | if (icd->streamer != file) |
298 | return -EBUSY; | |
299 | ||
592c2aba GL |
300 | if (ici->ops->init_videobuf) |
301 | return videobuf_qbuf(&icd->vb_vidq, p); | |
302 | else | |
303 | return vb2_qbuf(&icd->vb2_vidq, p); | |
e55222ef GL |
304 | } |
305 | ||
306 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
307 | struct v4l2_buffer *p) | |
308 | { | |
57bee29d | 309 | struct soc_camera_device *icd = file->private_data; |
592c2aba | 310 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
311 | |
312 | WARN_ON(priv != file->private_data); | |
313 | ||
57bee29d GL |
314 | if (icd->streamer != file) |
315 | return -EBUSY; | |
316 | ||
592c2aba GL |
317 | if (ici->ops->init_videobuf) |
318 | return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
319 | else | |
320 | return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK); | |
e55222ef GL |
321 | } |
322 | ||
40e2e092 | 323 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
324 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
325 | { | |
760697be | 326 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
c2786ad2 | 327 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
3805f201 HV |
328 | unsigned int i, fmts = 0, raw_fmts = 0; |
329 | int ret; | |
760697be GL |
330 | enum v4l2_mbus_pixelcode code; |
331 | ||
332 | while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) | |
333 | raw_fmts++; | |
c2786ad2 GL |
334 | |
335 | if (!ici->ops->get_formats) | |
336 | /* | |
337 | * Fallback mode - the host will have to serve all | |
338 | * sensor-provided formats one-to-one to the user | |
339 | */ | |
760697be | 340 | fmts = raw_fmts; |
c2786ad2 GL |
341 | else |
342 | /* | |
343 | * First pass - only count formats this host-sensor | |
344 | * configuration can provide | |
345 | */ | |
760697be | 346 | for (i = 0; i < raw_fmts; i++) { |
fa48984e GL |
347 | ret = ici->ops->get_formats(icd, i, NULL); |
348 | if (ret < 0) | |
349 | return ret; | |
350 | fmts += ret; | |
351 | } | |
c2786ad2 GL |
352 | |
353 | if (!fmts) | |
354 | return -ENXIO; | |
355 | ||
356 | icd->user_formats = | |
357 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
358 | if (!icd->user_formats) | |
359 | return -ENOMEM; | |
360 | ||
361 | icd->num_user_formats = fmts; | |
c2786ad2 GL |
362 | |
363 | dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts); | |
364 | ||
365 | /* Second pass - actually fill data formats */ | |
14df2cce | 366 | fmts = 0; |
760697be | 367 | for (i = 0; i < raw_fmts; i++) |
c2786ad2 | 368 | if (!ici->ops->get_formats) { |
760697be GL |
369 | v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); |
370 | icd->user_formats[i].host_fmt = | |
371 | soc_mbus_get_fmtdesc(code); | |
372 | icd->user_formats[i].code = code; | |
c2786ad2 | 373 | } else { |
fa48984e GL |
374 | ret = ici->ops->get_formats(icd, i, |
375 | &icd->user_formats[fmts]); | |
376 | if (ret < 0) | |
377 | goto egfmt; | |
378 | fmts += ret; | |
c2786ad2 GL |
379 | } |
380 | ||
760697be | 381 | icd->current_fmt = &icd->user_formats[0]; |
c2786ad2 GL |
382 | |
383 | return 0; | |
fa48984e GL |
384 | |
385 | egfmt: | |
386 | icd->num_user_formats = 0; | |
387 | vfree(icd->user_formats); | |
388 | return ret; | |
c2786ad2 GL |
389 | } |
390 | ||
40e2e092 | 391 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
392 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
393 | { | |
fa48984e GL |
394 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
395 | ||
396 | if (ici->ops->put_formats) | |
397 | ici->ops->put_formats(icd); | |
40e2e092 | 398 | icd->current_fmt = NULL; |
fa48984e | 399 | icd->num_user_formats = 0; |
c2786ad2 | 400 | vfree(icd->user_formats); |
40e2e092 | 401 | icd->user_formats = NULL; |
c2786ad2 GL |
402 | } |
403 | ||
760697be | 404 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
57bee29d | 405 | static int soc_camera_set_fmt(struct soc_camera_device *icd, |
df2ed070 GL |
406 | struct v4l2_format *f) |
407 | { | |
df2ed070 GL |
408 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
409 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
410 | int ret; | |
411 | ||
6a6c8786 GL |
412 | dev_dbg(&icd->dev, "S_FMT(%c%c%c%c, %ux%u)\n", |
413 | pixfmtstr(pix->pixelformat), pix->width, pix->height); | |
414 | ||
df2ed070 | 415 | /* We always call try_fmt() before set_fmt() or set_crop() */ |
dca6b6d1 | 416 | ret = soc_camera_try_fmt(icd, f); |
df2ed070 GL |
417 | if (ret < 0) |
418 | return ret; | |
419 | ||
420 | ret = ici->ops->set_fmt(icd, f); | |
421 | if (ret < 0) { | |
422 | return ret; | |
423 | } else if (!icd->current_fmt || | |
760697be | 424 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
2aa58db4 | 425 | dev_err(&icd->dev, |
df2ed070 GL |
426 | "Host driver hasn't set up current format correctly!\n"); |
427 | return -EINVAL; | |
428 | } | |
429 | ||
6a6c8786 GL |
430 | icd->user_width = pix->width; |
431 | icd->user_height = pix->height; | |
0e4c180d SA |
432 | icd->bytesperline = pix->bytesperline; |
433 | icd->sizeimage = pix->sizeimage; | |
760697be | 434 | icd->colorspace = pix->colorspace; |
592c2aba GL |
435 | icd->field = pix->field; |
436 | if (ici->ops->init_videobuf) | |
437 | icd->vb_vidq.field = pix->field; | |
025c18a1 | 438 | |
df2ed070 | 439 | dev_dbg(&icd->dev, "set width: %d height: %d\n", |
6a6c8786 | 440 | icd->user_width, icd->user_height); |
df2ed070 GL |
441 | |
442 | /* set physical bus parameters */ | |
443 | return ici->ops->set_bus_param(icd, pix->pixelformat); | |
444 | } | |
445 | ||
bec43661 | 446 | static int soc_camera_open(struct file *file) |
e55222ef | 447 | { |
979ea1dd | 448 | struct video_device *vdev = video_devdata(file); |
96c75399 GL |
449 | struct soc_camera_device *icd = container_of(vdev->parent, |
450 | struct soc_camera_device, | |
451 | dev); | |
979ea1dd | 452 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
9dc4e48f | 453 | struct soc_camera_host *ici; |
e55222ef GL |
454 | int ret; |
455 | ||
40e2e092 GL |
456 | if (!icd->ops) |
457 | /* No device driver attached */ | |
458 | return -ENODEV; | |
459 | ||
9dc4e48f | 460 | ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 461 | |
b8d9904c | 462 | if (!try_module_get(ici->ops->owner)) { |
e55222ef | 463 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); |
57bee29d | 464 | return -EINVAL; |
e55222ef GL |
465 | } |
466 | ||
1a0063a9 GL |
467 | icd->use_count++; |
468 | ||
9dc4e48f GL |
469 | /* Now we really have to activate the camera */ |
470 | if (icd->use_count == 1) { | |
025c18a1 | 471 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
472 | struct v4l2_format f = { |
473 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
474 | .fmt.pix = { | |
6a6c8786 GL |
475 | .width = icd->user_width, |
476 | .height = icd->user_height, | |
025c18a1 | 477 | .field = icd->field, |
760697be GL |
478 | .colorspace = icd->colorspace, |
479 | .pixelformat = | |
480 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
481 | }, |
482 | }; | |
483 | ||
96e442c1 AP |
484 | ret = soc_camera_power_set(icd, icl, 1); |
485 | if (ret < 0) | |
486 | goto epower; | |
979ea1dd GL |
487 | |
488 | /* The camera could have been already on, try to reset */ | |
489 | if (icl->reset) | |
490 | icl->reset(icd->pdev); | |
491 | ||
b8d9904c | 492 | ret = ici->ops->add(icd); |
9dc4e48f GL |
493 | if (ret < 0) { |
494 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
9dc4e48f GL |
495 | goto eiciadd; |
496 | } | |
df2ed070 | 497 | |
4f9fb5ed MCC |
498 | pm_runtime_enable(&icd->vdev->dev); |
499 | ret = pm_runtime_resume(&icd->vdev->dev); | |
500 | if (ret < 0 && ret != -ENOSYS) | |
501 | goto eresume; | |
502 | ||
760697be GL |
503 | /* |
504 | * Try to configure with default parameters. Notice: this is the | |
505 | * very first open, so, we cannot race against other calls, | |
506 | * apart from someone else calling open() simultaneously, but | |
507 | * .video_lock is protecting us against it. | |
508 | */ | |
57bee29d | 509 | ret = soc_camera_set_fmt(icd, &f); |
df2ed070 GL |
510 | if (ret < 0) |
511 | goto esfmt; | |
24d8c029 | 512 | |
592c2aba GL |
513 | if (ici->ops->init_videobuf) { |
514 | ici->ops->init_videobuf(&icd->vb_vidq, icd); | |
515 | } else { | |
516 | ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); | |
517 | if (ret < 0) | |
518 | goto einitvb; | |
519 | } | |
9dc4e48f GL |
520 | } |
521 | ||
57bee29d | 522 | file->private_data = icd; |
e55222ef GL |
523 | dev_dbg(&icd->dev, "camera device open\n"); |
524 | ||
e55222ef GL |
525 | return 0; |
526 | ||
df2ed070 | 527 | /* |
4f9fb5ed | 528 | * First four errors are entered with the .video_lock held |
df2ed070 GL |
529 | * and use_count == 1 |
530 | */ | |
592c2aba | 531 | einitvb: |
df2ed070 | 532 | esfmt: |
4f9fb5ed MCC |
533 | pm_runtime_disable(&icd->vdev->dev); |
534 | eresume: | |
df2ed070 | 535 | ici->ops->remove(icd); |
9dc4e48f | 536 | eiciadd: |
96e442c1 | 537 | soc_camera_power_set(icd, icl, 0); |
979ea1dd | 538 | epower: |
c2786ad2 | 539 | icd->use_count--; |
b8d9904c | 540 | module_put(ici->ops->owner); |
57bee29d | 541 | |
e55222ef GL |
542 | return ret; |
543 | } | |
544 | ||
bec43661 | 545 | static int soc_camera_close(struct file *file) |
e55222ef | 546 | { |
57bee29d | 547 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 548 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 549 | |
9dc4e48f | 550 | icd->use_count--; |
40e2e092 | 551 | if (!icd->use_count) { |
979ea1dd GL |
552 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
553 | ||
4f9fb5ed MCC |
554 | pm_runtime_suspend(&icd->vdev->dev); |
555 | pm_runtime_disable(&icd->vdev->dev); | |
556 | ||
b8d9904c | 557 | ici->ops->remove(icd); |
592c2aba GL |
558 | if (ici->ops->init_videobuf2) |
559 | vb2_queue_release(&icd->vb2_vidq); | |
4f9fb5ed | 560 | |
96e442c1 | 561 | soc_camera_power_set(icd, icl, 0); |
40e2e092 | 562 | } |
025c18a1 | 563 | |
57bee29d GL |
564 | if (icd->streamer == file) |
565 | icd->streamer = NULL; | |
566 | ||
b8d9904c | 567 | module_put(ici->ops->owner); |
9dc4e48f | 568 | |
2aa58db4 | 569 | dev_dbg(&icd->dev, "camera device close\n"); |
e55222ef GL |
570 | |
571 | return 0; | |
572 | } | |
573 | ||
aba360d8 | 574 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 575 | size_t count, loff_t *ppos) |
e55222ef | 576 | { |
57bee29d | 577 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
578 | int err = -EINVAL; |
579 | ||
2aa58db4 | 580 | dev_err(&icd->dev, "camera device read not implemented\n"); |
e55222ef GL |
581 | |
582 | return err; | |
583 | } | |
584 | ||
585 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
586 | { | |
57bee29d | 587 | struct soc_camera_device *icd = file->private_data; |
592c2aba | 588 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
589 | int err; |
590 | ||
591 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
592 | ||
57bee29d GL |
593 | if (icd->streamer != file) |
594 | return -EBUSY; | |
595 | ||
592c2aba GL |
596 | if (ici->ops->init_videobuf) |
597 | err = videobuf_mmap_mapper(&icd->vb_vidq, vma); | |
598 | else | |
599 | err = vb2_mmap(&icd->vb2_vidq, vma); | |
e55222ef GL |
600 | |
601 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
602 | (unsigned long)vma->vm_start, | |
603 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
604 | err); | |
605 | ||
606 | return err; | |
607 | } | |
608 | ||
609 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
610 | { | |
57bee29d | 611 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 612 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 613 | |
57bee29d GL |
614 | if (icd->streamer != file) |
615 | return -EBUSY; | |
616 | ||
592c2aba | 617 | if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) { |
e55222ef GL |
618 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); |
619 | return POLLERR; | |
620 | } | |
621 | ||
b8d9904c | 622 | return ici->ops->poll(file, pt); |
e55222ef GL |
623 | } |
624 | ||
592c2aba GL |
625 | void soc_camera_lock(struct vb2_queue *vq) |
626 | { | |
627 | struct soc_camera_device *icd = vb2_get_drv_priv(vq); | |
628 | mutex_lock(&icd->video_lock); | |
629 | } | |
630 | EXPORT_SYMBOL(soc_camera_lock); | |
631 | ||
632 | void soc_camera_unlock(struct vb2_queue *vq) | |
633 | { | |
634 | struct soc_camera_device *icd = vb2_get_drv_priv(vq); | |
635 | mutex_unlock(&icd->video_lock); | |
636 | } | |
637 | EXPORT_SYMBOL(soc_camera_unlock); | |
638 | ||
bec43661 | 639 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
640 | .owner = THIS_MODULE, |
641 | .open = soc_camera_open, | |
642 | .release = soc_camera_close, | |
b6a633c1 | 643 | .unlocked_ioctl = video_ioctl2, |
e55222ef GL |
644 | .read = soc_camera_read, |
645 | .mmap = soc_camera_mmap, | |
646 | .poll = soc_camera_poll, | |
e55222ef GL |
647 | }; |
648 | ||
72937890 | 649 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 650 | struct v4l2_format *f) |
e55222ef | 651 | { |
57bee29d | 652 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 653 | int ret; |
e55222ef GL |
654 | |
655 | WARN_ON(priv != file->private_data); | |
656 | ||
d366d4a0 GL |
657 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
658 | dev_warn(&icd->dev, "Wrong buf-type %d\n", f->type); | |
659 | return -EINVAL; | |
660 | } | |
661 | ||
57bee29d GL |
662 | if (icd->streamer && icd->streamer != file) |
663 | return -EBUSY; | |
1c3bb743 | 664 | |
57bee29d | 665 | if (icd->vb_vidq.bufs[0]) { |
b897a91a | 666 | dev_err(&icd->dev, "S_FMT denied: queue initialised\n"); |
b6a633c1 | 667 | return -EBUSY; |
1c3bb743 GL |
668 | } |
669 | ||
57bee29d GL |
670 | ret = soc_camera_set_fmt(icd, f); |
671 | ||
672 | if (!ret && !icd->streamer) | |
673 | icd->streamer = file; | |
1c3bb743 | 674 | |
1c3bb743 | 675 | return ret; |
e55222ef GL |
676 | } |
677 | ||
72937890 | 678 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 679 | struct v4l2_fmtdesc *f) |
e55222ef | 680 | { |
57bee29d | 681 | struct soc_camera_device *icd = file->private_data; |
760697be | 682 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
683 | |
684 | WARN_ON(priv != file->private_data); | |
685 | ||
c2786ad2 | 686 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
687 | return -EINVAL; |
688 | ||
c2786ad2 | 689 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 690 | |
760697be GL |
691 | if (format->name) |
692 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
693 | f->pixelformat = format->fourcc; |
694 | return 0; | |
695 | } | |
696 | ||
72937890 | 697 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 698 | struct v4l2_format *f) |
e55222ef | 699 | { |
57bee29d | 700 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 701 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
702 | |
703 | WARN_ON(priv != file->private_data); | |
704 | ||
d366d4a0 GL |
705 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
706 | return -EINVAL; | |
707 | ||
6a6c8786 GL |
708 | pix->width = icd->user_width; |
709 | pix->height = icd->user_height; | |
0e4c180d SA |
710 | pix->bytesperline = icd->bytesperline; |
711 | pix->sizeimage = icd->sizeimage; | |
592c2aba | 712 | pix->field = icd->field; |
760697be | 713 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
760697be | 714 | pix->colorspace = icd->colorspace; |
e55222ef | 715 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 716 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
717 | return 0; |
718 | } | |
719 | ||
720 | static int soc_camera_querycap(struct file *file, void *priv, | |
721 | struct v4l2_capability *cap) | |
722 | { | |
57bee29d | 723 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 724 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
725 | |
726 | WARN_ON(priv != file->private_data); | |
727 | ||
728 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 729 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
730 | } |
731 | ||
732 | static int soc_camera_streamon(struct file *file, void *priv, | |
733 | enum v4l2_buf_type i) | |
734 | { | |
57bee29d | 735 | struct soc_camera_device *icd = file->private_data; |
592c2aba | 736 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 737 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 738 | int ret; |
e55222ef GL |
739 | |
740 | WARN_ON(priv != file->private_data); | |
741 | ||
e55222ef GL |
742 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
743 | return -EINVAL; | |
744 | ||
57bee29d GL |
745 | if (icd->streamer != file) |
746 | return -EBUSY; | |
747 | ||
e55222ef | 748 | /* This calls buf_queue from host driver's videobuf_queue_ops */ |
592c2aba GL |
749 | if (ici->ops->init_videobuf) |
750 | ret = videobuf_streamon(&icd->vb_vidq); | |
751 | else | |
752 | ret = vb2_streamon(&icd->vb2_vidq, i); | |
753 | ||
7fdbd85b AG |
754 | if (!ret) |
755 | v4l2_subdev_call(sd, video, s_stream, 1); | |
1c3bb743 | 756 | |
1c3bb743 | 757 | return ret; |
e55222ef GL |
758 | } |
759 | ||
760 | static int soc_camera_streamoff(struct file *file, void *priv, | |
761 | enum v4l2_buf_type i) | |
762 | { | |
57bee29d | 763 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 764 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
592c2aba | 765 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
766 | |
767 | WARN_ON(priv != file->private_data); | |
768 | ||
e55222ef GL |
769 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
770 | return -EINVAL; | |
771 | ||
57bee29d GL |
772 | if (icd->streamer != file) |
773 | return -EBUSY; | |
774 | ||
5d28d525 GL |
775 | /* |
776 | * This calls buf_release from host driver's videobuf_queue_ops for all | |
777 | * remaining buffers. When the last buffer is freed, stop capture | |
778 | */ | |
592c2aba GL |
779 | if (ici->ops->init_videobuf) |
780 | videobuf_streamoff(&icd->vb_vidq); | |
781 | else | |
782 | vb2_streamoff(&icd->vb2_vidq, i); | |
e55222ef | 783 | |
c9c1f1c0 | 784 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef GL |
785 | |
786 | return 0; | |
787 | } | |
788 | ||
789 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
790 | struct v4l2_queryctrl *qc) | |
791 | { | |
57bee29d | 792 | struct soc_camera_device *icd = file->private_data; |
2840d249 | 793 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef GL |
794 | int i; |
795 | ||
796 | WARN_ON(priv != file->private_data); | |
797 | ||
798 | if (!qc->id) | |
799 | return -EINVAL; | |
800 | ||
2840d249 GL |
801 | /* First check host controls */ |
802 | for (i = 0; i < ici->ops->num_controls; i++) | |
803 | if (qc->id == ici->ops->controls[i].id) { | |
804 | memcpy(qc, &(ici->ops->controls[i]), | |
805 | sizeof(*qc)); | |
806 | return 0; | |
807 | } | |
808 | ||
809 | /* Then device controls */ | |
e55222ef GL |
810 | for (i = 0; i < icd->ops->num_controls; i++) |
811 | if (qc->id == icd->ops->controls[i].id) { | |
812 | memcpy(qc, &(icd->ops->controls[i]), | |
813 | sizeof(*qc)); | |
814 | return 0; | |
815 | } | |
816 | ||
817 | return -EINVAL; | |
818 | } | |
819 | ||
820 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
821 | struct v4l2_control *ctrl) | |
822 | { | |
57bee29d | 823 | struct soc_camera_device *icd = file->private_data; |
979ea1dd | 824 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 825 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 826 | int ret; |
e55222ef GL |
827 | |
828 | WARN_ON(priv != file->private_data); | |
829 | ||
2840d249 GL |
830 | if (ici->ops->get_ctrl) { |
831 | ret = ici->ops->get_ctrl(icd, ctrl); | |
832 | if (ret != -ENOIOCTLCMD) | |
833 | return ret; | |
834 | } | |
835 | ||
c9c1f1c0 | 836 | return v4l2_subdev_call(sd, core, g_ctrl, ctrl); |
e55222ef GL |
837 | } |
838 | ||
839 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
840 | struct v4l2_control *ctrl) | |
841 | { | |
57bee29d | 842 | struct soc_camera_device *icd = file->private_data; |
979ea1dd | 843 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
c9c1f1c0 | 844 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2840d249 | 845 | int ret; |
e55222ef GL |
846 | |
847 | WARN_ON(priv != file->private_data); | |
848 | ||
2840d249 GL |
849 | if (ici->ops->set_ctrl) { |
850 | ret = ici->ops->set_ctrl(icd, ctrl); | |
851 | if (ret != -ENOIOCTLCMD) | |
852 | return ret; | |
853 | } | |
854 | ||
c9c1f1c0 | 855 | return v4l2_subdev_call(sd, core, s_ctrl, ctrl); |
e55222ef GL |
856 | } |
857 | ||
858 | static int soc_camera_cropcap(struct file *file, void *fh, | |
859 | struct v4l2_cropcap *a) | |
860 | { | |
57bee29d | 861 | struct soc_camera_device *icd = file->private_data; |
6a6c8786 | 862 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
e55222ef | 863 | |
6a6c8786 | 864 | return ici->ops->cropcap(icd, a); |
e55222ef GL |
865 | } |
866 | ||
867 | static int soc_camera_g_crop(struct file *file, void *fh, | |
868 | struct v4l2_crop *a) | |
869 | { | |
57bee29d | 870 | struct soc_camera_device *icd = file->private_data; |
6a6c8786 GL |
871 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
872 | int ret; | |
e55222ef | 873 | |
6a6c8786 | 874 | ret = ici->ops->get_crop(icd, a); |
e55222ef | 875 | |
6a6c8786 | 876 | return ret; |
e55222ef GL |
877 | } |
878 | ||
68a54f0e GL |
879 | /* |
880 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
881 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
ab56d5eb | 882 | * retrieve it. |
68a54f0e | 883 | */ |
e55222ef GL |
884 | static int soc_camera_s_crop(struct file *file, void *fh, |
885 | struct v4l2_crop *a) | |
886 | { | |
57bee29d | 887 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 888 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
6a6c8786 GL |
889 | struct v4l2_rect *rect = &a->c; |
890 | struct v4l2_crop current_crop; | |
e55222ef GL |
891 | int ret; |
892 | ||
893 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
894 | return -EINVAL; | |
895 | ||
6a6c8786 GL |
896 | dev_dbg(&icd->dev, "S_CROP(%ux%u@%u:%u)\n", |
897 | rect->width, rect->height, rect->left, rect->top); | |
898 | ||
6a6c8786 GL |
899 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
900 | ret = ici->ops->get_crop(icd, ¤t_crop); | |
901 | ||
b897a91a | 902 | /* Prohibit window size change with initialised buffers */ |
103754a0 GL |
903 | if (ret < 0) { |
904 | dev_err(&icd->dev, | |
905 | "S_CROP denied: getting current crop failed\n"); | |
57bee29d | 906 | } else if (icd->vb_vidq.bufs[0] && |
103754a0 GL |
907 | (a->c.width != current_crop.c.width || |
908 | a->c.height != current_crop.c.height)) { | |
b897a91a GL |
909 | dev_err(&icd->dev, |
910 | "S_CROP denied: queue initialised and sizes differ\n"); | |
911 | ret = -EBUSY; | |
6a6c8786 GL |
912 | } else { |
913 | ret = ici->ops->set_crop(icd, a); | |
b897a91a GL |
914 | } |
915 | ||
e55222ef GL |
916 | return ret; |
917 | } | |
918 | ||
c9f6ef69 GL |
919 | static int soc_camera_g_parm(struct file *file, void *fh, |
920 | struct v4l2_streamparm *a) | |
921 | { | |
57bee29d | 922 | struct soc_camera_device *icd = file->private_data; |
c9f6ef69 GL |
923 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
924 | ||
925 | if (ici->ops->get_parm) | |
926 | return ici->ops->get_parm(icd, a); | |
927 | ||
928 | return -ENOIOCTLCMD; | |
929 | } | |
930 | ||
931 | static int soc_camera_s_parm(struct file *file, void *fh, | |
932 | struct v4l2_streamparm *a) | |
933 | { | |
57bee29d | 934 | struct soc_camera_device *icd = file->private_data; |
c9f6ef69 GL |
935 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
936 | ||
937 | if (ici->ops->set_parm) | |
938 | return ici->ops->set_parm(icd, a); | |
939 | ||
940 | return -ENOIOCTLCMD; | |
941 | } | |
942 | ||
e55222ef | 943 | static int soc_camera_g_chip_ident(struct file *file, void *fh, |
aecde8b5 | 944 | struct v4l2_dbg_chip_ident *id) |
e55222ef | 945 | { |
57bee29d | 946 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 947 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 948 | |
c9c1f1c0 | 949 | return v4l2_subdev_call(sd, core, g_chip_ident, id); |
e55222ef GL |
950 | } |
951 | ||
952 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
953 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 954 | struct v4l2_dbg_register *reg) |
e55222ef | 955 | { |
57bee29d | 956 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 957 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 958 | |
c9c1f1c0 | 959 | return v4l2_subdev_call(sd, core, g_register, reg); |
e55222ef GL |
960 | } |
961 | ||
962 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 963 | struct v4l2_dbg_register *reg) |
e55222ef | 964 | { |
57bee29d | 965 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 966 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 967 | |
c9c1f1c0 | 968 | return v4l2_subdev_call(sd, core, s_register, reg); |
e55222ef GL |
969 | } |
970 | #endif | |
971 | ||
e55222ef GL |
972 | /* So far this function cannot fail */ |
973 | static void scan_add_host(struct soc_camera_host *ici) | |
974 | { | |
975 | struct soc_camera_device *icd; | |
976 | ||
977 | mutex_lock(&list_lock); | |
978 | ||
979 | list_for_each_entry(icd, &devices, list) { | |
980 | if (icd->iface == ici->nr) { | |
40e2e092 | 981 | int ret; |
979ea1dd | 982 | icd->dev.parent = ici->v4l2_dev.dev; |
40e2e092 GL |
983 | dev_set_name(&icd->dev, "%u-%u", icd->iface, |
984 | icd->devnum); | |
985 | ret = device_register(&icd->dev); | |
986 | if (ret < 0) { | |
987 | icd->dev.parent = NULL; | |
988 | dev_err(&icd->dev, | |
989 | "Cannot register device: %d\n", ret); | |
990 | } | |
e55222ef GL |
991 | } |
992 | } | |
993 | ||
994 | mutex_unlock(&list_lock); | |
995 | } | |
996 | ||
40e2e092 GL |
997 | #ifdef CONFIG_I2C_BOARDINFO |
998 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | |
999 | struct soc_camera_link *icl) | |
e55222ef | 1000 | { |
40e2e092 | 1001 | struct i2c_client *client; |
979ea1dd | 1002 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
40e2e092 | 1003 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); |
979ea1dd | 1004 | struct v4l2_subdev *subdev; |
e55222ef | 1005 | |
40e2e092 | 1006 | if (!adap) { |
40e2e092 GL |
1007 | dev_err(&icd->dev, "Cannot get I2C adapter #%d. No driver?\n", |
1008 | icl->i2c_adapter_id); | |
1009 | goto ei2cga; | |
1010 | } | |
e55222ef | 1011 | |
40e2e092 | 1012 | icl->board_info->platform_data = icd; |
e55222ef | 1013 | |
979ea1dd | 1014 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
9a1f8b34 | 1015 | icl->board_info, NULL); |
d74f841c | 1016 | if (!subdev) |
40e2e092 | 1017 | goto ei2cnd; |
e55222ef | 1018 | |
c4ce6d14 | 1019 | client = v4l2_get_subdevdata(subdev); |
979ea1dd | 1020 | |
40e2e092 GL |
1021 | /* Use to_i2c_client(dev) to recover the i2c client */ |
1022 | dev_set_drvdata(&icd->dev, &client->dev); | |
e55222ef | 1023 | |
40e2e092 GL |
1024 | return 0; |
1025 | ei2cnd: | |
1026 | i2c_put_adapter(adap); | |
1027 | ei2cga: | |
d74f841c | 1028 | return -ENODEV; |
e55222ef GL |
1029 | } |
1030 | ||
40e2e092 GL |
1031 | static void soc_camera_free_i2c(struct soc_camera_device *icd) |
1032 | { | |
1033 | struct i2c_client *client = | |
1034 | to_i2c_client(to_soc_camera_control(icd)); | |
c8dd7078 | 1035 | struct i2c_adapter *adap = client->adapter; |
40e2e092 | 1036 | dev_set_drvdata(&icd->dev, NULL); |
979ea1dd | 1037 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 | 1038 | i2c_unregister_device(client); |
c8dd7078 | 1039 | i2c_put_adapter(adap); |
40e2e092 GL |
1040 | } |
1041 | #else | |
1042 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | |
1043 | #define soc_camera_free_i2c(icd) do {} while (0) | |
1044 | #endif | |
1045 | ||
979ea1dd | 1046 | static int soc_camera_video_start(struct soc_camera_device *icd); |
40e2e092 GL |
1047 | static int video_dev_create(struct soc_camera_device *icd); |
1048 | /* Called during host-driver probe */ | |
e55222ef GL |
1049 | static int soc_camera_probe(struct device *dev) |
1050 | { | |
1051 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
979ea1dd | 1052 | struct soc_camera_host *ici = to_soc_camera_host(dev->parent); |
40e2e092 | 1053 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
979ea1dd | 1054 | struct device *control = NULL; |
6a6c8786 | 1055 | struct v4l2_subdev *sd; |
760697be | 1056 | struct v4l2_mbus_framefmt mf; |
e55222ef GL |
1057 | int ret; |
1058 | ||
40e2e092 | 1059 | dev_info(dev, "Probing %s\n", dev_name(dev)); |
1c3bb743 | 1060 | |
96e442c1 AP |
1061 | ret = regulator_bulk_get(icd->pdev, icl->num_regulators, |
1062 | icl->regulators); | |
1063 | if (ret < 0) | |
1064 | goto ereg; | |
1065 | ||
1066 | ret = soc_camera_power_set(icd, icl, 1); | |
1067 | if (ret < 0) | |
1068 | goto epower; | |
979ea1dd GL |
1069 | |
1070 | /* The camera could have been already on, try to reset */ | |
1071 | if (icl->reset) | |
1072 | icl->reset(icd->pdev); | |
1073 | ||
1074 | ret = ici->ops->add(icd); | |
1075 | if (ret < 0) | |
1076 | goto eadd; | |
1077 | ||
1078 | /* Must have icd->vdev before registering the device */ | |
40e2e092 GL |
1079 | ret = video_dev_create(icd); |
1080 | if (ret < 0) | |
1081 | goto evdc; | |
1c3bb743 | 1082 | |
40e2e092 GL |
1083 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
1084 | if (icl->board_info) { | |
1085 | ret = soc_camera_init_i2c(icd, icl); | |
1086 | if (ret < 0) | |
1087 | goto eadddev; | |
1088 | } else if (!icl->add_device || !icl->del_device) { | |
1c3bb743 | 1089 | ret = -EINVAL; |
40e2e092 GL |
1090 | goto eadddev; |
1091 | } else { | |
979ea1dd GL |
1092 | if (icl->module_name) |
1093 | ret = request_module(icl->module_name); | |
1094 | ||
40e2e092 GL |
1095 | ret = icl->add_device(icl, &icd->dev); |
1096 | if (ret < 0) | |
1097 | goto eadddev; | |
1c3bb743 | 1098 | |
96c75399 GL |
1099 | /* |
1100 | * FIXME: this is racy, have to use driver-binding notification, | |
1101 | * when it is available | |
1102 | */ | |
979ea1dd | 1103 | control = to_soc_camera_control(icd); |
08590b96 | 1104 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd GL |
1105 | !try_module_get(control->driver->owner)) { |
1106 | icl->del_device(icl); | |
1107 | goto enodrv; | |
1108 | } | |
40e2e092 | 1109 | } |
e55222ef | 1110 | |
24105ebc GL |
1111 | sd = soc_camera_to_subdev(icd); |
1112 | sd->grp_id = (long)icd; | |
1113 | ||
fa48984e GL |
1114 | /* At this point client .probe() should have run already */ |
1115 | ret = soc_camera_init_user_formats(icd); | |
1116 | if (ret < 0) | |
1117 | goto eiufmt; | |
1118 | ||
fa48984e GL |
1119 | icd->field = V4L2_FIELD_ANY; |
1120 | ||
b6a633c1 GL |
1121 | icd->vdev->lock = &icd->video_lock; |
1122 | ||
1123 | /* | |
1124 | * ..._video_start() will create a device node, video_register_device() | |
1125 | * itself is protected against concurrent open() calls, but we also have | |
1126 | * to protect our data. | |
1127 | */ | |
979ea1dd GL |
1128 | mutex_lock(&icd->video_lock); |
1129 | ||
1130 | ret = soc_camera_video_start(icd); | |
1131 | if (ret < 0) | |
1132 | goto evidstart; | |
1133 | ||
6a6c8786 | 1134 | /* Try to improve our guess of a reasonable window format */ |
760697be GL |
1135 | if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { |
1136 | icd->user_width = mf.width; | |
1137 | icd->user_height = mf.height; | |
1138 | icd->colorspace = mf.colorspace; | |
1139 | icd->field = mf.field; | |
6a6c8786 GL |
1140 | } |
1141 | ||
40e2e092 | 1142 | /* Do we have to sysfs_remove_link() before device_unregister()? */ |
6a6c8786 | 1143 | if (sysfs_create_link(&icd->dev.kobj, &to_soc_camera_control(icd)->kobj, |
40e2e092 GL |
1144 | "control")) |
1145 | dev_warn(&icd->dev, "Failed creating the control symlink\n"); | |
025c18a1 | 1146 | |
979ea1dd GL |
1147 | ici->ops->remove(icd); |
1148 | ||
96e442c1 | 1149 | soc_camera_power_set(icd, icl, 0); |
979ea1dd GL |
1150 | |
1151 | mutex_unlock(&icd->video_lock); | |
025c18a1 | 1152 | |
40e2e092 | 1153 | return 0; |
e55222ef | 1154 | |
979ea1dd GL |
1155 | evidstart: |
1156 | mutex_unlock(&icd->video_lock); | |
fa48984e GL |
1157 | soc_camera_free_user_formats(icd); |
1158 | eiufmt: | |
979ea1dd | 1159 | if (icl->board_info) { |
40e2e092 | 1160 | soc_camera_free_i2c(icd); |
979ea1dd | 1161 | } else { |
40e2e092 | 1162 | icl->del_device(icl); |
979ea1dd GL |
1163 | module_put(control->driver->owner); |
1164 | } | |
1165 | enodrv: | |
40e2e092 GL |
1166 | eadddev: |
1167 | video_device_release(icd->vdev); | |
1168 | evdc: | |
979ea1dd GL |
1169 | ici->ops->remove(icd); |
1170 | eadd: | |
96e442c1 | 1171 | soc_camera_power_set(icd, icl, 0); |
979ea1dd | 1172 | epower: |
96e442c1 AP |
1173 | regulator_bulk_free(icl->num_regulators, icl->regulators); |
1174 | ereg: | |
e55222ef GL |
1175 | return ret; |
1176 | } | |
1177 | ||
5d28d525 GL |
1178 | /* |
1179 | * This is called on device_unregister, which only means we have to disconnect | |
1180 | * from the host, but not remove ourselves from the device list | |
1181 | */ | |
e55222ef GL |
1182 | static int soc_camera_remove(struct device *dev) |
1183 | { | |
1184 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
40e2e092 GL |
1185 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
1186 | struct video_device *vdev = icd->vdev; | |
e55222ef | 1187 | |
40e2e092 | 1188 | BUG_ON(!dev->parent); |
e55222ef | 1189 | |
40e2e092 | 1190 | if (vdev) { |
40e2e092 GL |
1191 | video_unregister_device(vdev); |
1192 | icd->vdev = NULL; | |
40e2e092 GL |
1193 | } |
1194 | ||
979ea1dd | 1195 | if (icl->board_info) { |
40e2e092 | 1196 | soc_camera_free_i2c(icd); |
979ea1dd GL |
1197 | } else { |
1198 | struct device_driver *drv = to_soc_camera_control(icd) ? | |
1199 | to_soc_camera_control(icd)->driver : NULL; | |
1200 | if (drv) { | |
1201 | icl->del_device(icl); | |
1202 | module_put(drv->owner); | |
1203 | } | |
1204 | } | |
fa48984e | 1205 | soc_camera_free_user_formats(icd); |
025c18a1 | 1206 | |
96e442c1 AP |
1207 | regulator_bulk_free(icl->num_regulators, icl->regulators); |
1208 | ||
e55222ef GL |
1209 | return 0; |
1210 | } | |
1211 | ||
2e521061 RJ |
1212 | static int soc_camera_suspend(struct device *dev, pm_message_t state) |
1213 | { | |
1214 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1215 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1216 | int ret = 0; | |
1217 | ||
1218 | if (ici->ops->suspend) | |
1219 | ret = ici->ops->suspend(icd, state); | |
1220 | ||
1221 | return ret; | |
1222 | } | |
1223 | ||
1224 | static int soc_camera_resume(struct device *dev) | |
1225 | { | |
1226 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
1227 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1228 | int ret = 0; | |
1229 | ||
1230 | if (ici->ops->resume) | |
1231 | ret = ici->ops->resume(icd); | |
1232 | ||
1233 | return ret; | |
1234 | } | |
1235 | ||
52d268a3 | 1236 | struct bus_type soc_camera_bus_type = { |
e55222ef GL |
1237 | .name = "soc-camera", |
1238 | .probe = soc_camera_probe, | |
1239 | .remove = soc_camera_remove, | |
2e521061 RJ |
1240 | .suspend = soc_camera_suspend, |
1241 | .resume = soc_camera_resume, | |
e55222ef | 1242 | }; |
52d268a3 | 1243 | EXPORT_SYMBOL_GPL(soc_camera_bus_type); |
e55222ef GL |
1244 | |
1245 | static struct device_driver ic_drv = { | |
1246 | .name = "camera", | |
1247 | .bus = &soc_camera_bus_type, | |
1248 | .owner = THIS_MODULE, | |
1249 | }; | |
1250 | ||
e55222ef GL |
1251 | static void dummy_release(struct device *dev) |
1252 | { | |
1253 | } | |
1254 | ||
6a6c8786 GL |
1255 | static int default_cropcap(struct soc_camera_device *icd, |
1256 | struct v4l2_cropcap *a) | |
1257 | { | |
1258 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1259 | return v4l2_subdev_call(sd, video, cropcap, a); | |
1260 | } | |
1261 | ||
1262 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1263 | { | |
1264 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1265 | return v4l2_subdev_call(sd, video, g_crop, a); | |
1266 | } | |
1267 | ||
1268 | static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1269 | { | |
1270 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1271 | return v4l2_subdev_call(sd, video, s_crop, a); | |
1272 | } | |
1273 | ||
06e17821 JK |
1274 | static int default_g_parm(struct soc_camera_device *icd, |
1275 | struct v4l2_streamparm *parm) | |
1276 | { | |
1277 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1278 | return v4l2_subdev_call(sd, video, g_parm, parm); | |
1279 | } | |
1280 | ||
1281 | static int default_s_parm(struct soc_camera_device *icd, | |
1282 | struct v4l2_streamparm *parm) | |
1283 | { | |
1284 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1285 | return v4l2_subdev_call(sd, video, s_parm, parm); | |
1286 | } | |
1287 | ||
ed5b65dc QX |
1288 | static int default_enum_fsizes(struct soc_camera_device *icd, |
1289 | struct v4l2_frmsizeenum *fsize) | |
1290 | { | |
1291 | int ret; | |
1292 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1293 | const struct soc_camera_format_xlate *xlate; | |
1294 | __u32 pixfmt = fsize->pixel_format; | |
1295 | struct v4l2_frmsizeenum fsize_mbus = *fsize; | |
1296 | ||
1297 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); | |
1298 | if (!xlate) | |
1299 | return -EINVAL; | |
1300 | /* map xlate-code to pixel_format, sensor only handle xlate-code*/ | |
1301 | fsize_mbus.pixel_format = xlate->code; | |
1302 | ||
1303 | ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &fsize_mbus); | |
1304 | if (ret < 0) | |
1305 | return ret; | |
1306 | ||
1307 | *fsize = fsize_mbus; | |
1308 | fsize->pixel_format = pixfmt; | |
1309 | ||
1310 | return 0; | |
1311 | } | |
1312 | ||
64ff9ba5 GL |
1313 | static void soc_camera_device_init(struct device *dev, void *pdata) |
1314 | { | |
1315 | dev->platform_data = pdata; | |
1316 | dev->bus = &soc_camera_bus_type; | |
1317 | dev->release = dummy_release; | |
1318 | } | |
1319 | ||
b8d9904c | 1320 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1321 | { |
e55222ef | 1322 | struct soc_camera_host *ix; |
979ea1dd | 1323 | int ret; |
e55222ef | 1324 | |
64f5905e GL |
1325 | if (!ici || !ici->ops || |
1326 | !ici->ops->try_fmt || | |
1327 | !ici->ops->set_fmt || | |
1328 | !ici->ops->set_bus_param || | |
1329 | !ici->ops->querycap || | |
592c2aba GL |
1330 | ((!ici->ops->init_videobuf || |
1331 | !ici->ops->reqbufs) && | |
1332 | !ici->ops->init_videobuf2) || | |
64f5905e GL |
1333 | !ici->ops->add || |
1334 | !ici->ops->remove || | |
eff505fa | 1335 | !ici->ops->poll || |
979ea1dd | 1336 | !ici->v4l2_dev.dev) |
e55222ef GL |
1337 | return -EINVAL; |
1338 | ||
6a6c8786 GL |
1339 | if (!ici->ops->set_crop) |
1340 | ici->ops->set_crop = default_s_crop; | |
1341 | if (!ici->ops->get_crop) | |
1342 | ici->ops->get_crop = default_g_crop; | |
1343 | if (!ici->ops->cropcap) | |
1344 | ici->ops->cropcap = default_cropcap; | |
06e17821 JK |
1345 | if (!ici->ops->set_parm) |
1346 | ici->ops->set_parm = default_s_parm; | |
1347 | if (!ici->ops->get_parm) | |
1348 | ici->ops->get_parm = default_g_parm; | |
ed5b65dc QX |
1349 | if (!ici->ops->enum_fsizes) |
1350 | ici->ops->enum_fsizes = default_enum_fsizes; | |
6a6c8786 | 1351 | |
e55222ef GL |
1352 | mutex_lock(&list_lock); |
1353 | list_for_each_entry(ix, &hosts, list) { | |
1354 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1355 | ret = -EBUSY; |
1356 | goto edevreg; | |
e55222ef GL |
1357 | } |
1358 | } | |
1359 | ||
979ea1dd GL |
1360 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1361 | if (ret < 0) | |
1362 | goto edevreg; | |
eff505fa | 1363 | |
e55222ef GL |
1364 | list_add_tail(&ici->list, &hosts); |
1365 | mutex_unlock(&list_lock); | |
1366 | ||
e55222ef GL |
1367 | scan_add_host(ici); |
1368 | ||
1369 | return 0; | |
979ea1dd GL |
1370 | |
1371 | edevreg: | |
1372 | mutex_unlock(&list_lock); | |
1373 | return ret; | |
e55222ef GL |
1374 | } |
1375 | EXPORT_SYMBOL(soc_camera_host_register); | |
1376 | ||
1377 | /* Unregister all clients! */ | |
1378 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1379 | { | |
1380 | struct soc_camera_device *icd; | |
1381 | ||
1382 | mutex_lock(&list_lock); | |
1383 | ||
1384 | list_del(&ici->list); | |
1385 | ||
1386 | list_for_each_entry(icd, &devices, list) { | |
979ea1dd | 1387 | if (icd->iface == ici->nr) { |
64ff9ba5 | 1388 | void *pdata = icd->dev.platform_data; |
40e2e092 | 1389 | /* The bus->remove will be called */ |
e55222ef | 1390 | device_unregister(&icd->dev); |
76823b79 GL |
1391 | /* |
1392 | * Not before device_unregister(), .remove | |
1393 | * needs parent to call ici->ops->remove(). | |
1394 | * If the host module is loaded again, device_register() | |
1395 | * would complain "already initialised," since 2.6.32 | |
1396 | * this is also needed to prevent use-after-free of the | |
1397 | * device private data. | |
1398 | */ | |
1399 | memset(&icd->dev, 0, sizeof(icd->dev)); | |
64ff9ba5 | 1400 | soc_camera_device_init(&icd->dev, pdata); |
e55222ef GL |
1401 | } |
1402 | } | |
1403 | ||
1404 | mutex_unlock(&list_lock); | |
1405 | ||
979ea1dd | 1406 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1407 | } |
1408 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1409 | ||
1410 | /* Image capture device */ | |
40e2e092 | 1411 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1412 | { |
1413 | struct soc_camera_device *ix; | |
1414 | int num = -1, i; | |
1415 | ||
e55222ef GL |
1416 | for (i = 0; i < 256 && num < 0; i++) { |
1417 | num = i; | |
40e2e092 | 1418 | /* Check if this index is available on this interface */ |
e55222ef GL |
1419 | list_for_each_entry(ix, &devices, list) { |
1420 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1421 | num = -1; | |
1422 | break; | |
1423 | } | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | if (num < 0) | |
5d28d525 GL |
1428 | /* |
1429 | * ok, we have 256 cameras on this host... | |
1430 | * man, stay reasonable... | |
1431 | */ | |
e55222ef GL |
1432 | return -ENOMEM; |
1433 | ||
64ff9ba5 | 1434 | icd->devnum = num; |
64f5905e GL |
1435 | icd->use_count = 0; |
1436 | icd->host_priv = NULL; | |
1c3bb743 | 1437 | mutex_init(&icd->video_lock); |
e55222ef | 1438 | |
40e2e092 GL |
1439 | list_add_tail(&icd->list, &devices); |
1440 | ||
1441 | return 0; | |
e55222ef | 1442 | } |
e55222ef | 1443 | |
40e2e092 | 1444 | static void soc_camera_device_unregister(struct soc_camera_device *icd) |
e55222ef | 1445 | { |
e55222ef | 1446 | list_del(&icd->list); |
e55222ef | 1447 | } |
e55222ef | 1448 | |
a399810c HV |
1449 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1450 | .vidioc_querycap = soc_camera_querycap, | |
1451 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | |
1452 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | |
1453 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | |
1454 | .vidioc_enum_input = soc_camera_enum_input, | |
1455 | .vidioc_g_input = soc_camera_g_input, | |
1456 | .vidioc_s_input = soc_camera_s_input, | |
1457 | .vidioc_s_std = soc_camera_s_std, | |
ed5b65dc | 1458 | .vidioc_enum_framesizes = soc_camera_enum_fsizes, |
a399810c HV |
1459 | .vidioc_reqbufs = soc_camera_reqbufs, |
1460 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | |
1461 | .vidioc_querybuf = soc_camera_querybuf, | |
1462 | .vidioc_qbuf = soc_camera_qbuf, | |
1463 | .vidioc_dqbuf = soc_camera_dqbuf, | |
1464 | .vidioc_streamon = soc_camera_streamon, | |
1465 | .vidioc_streamoff = soc_camera_streamoff, | |
1466 | .vidioc_queryctrl = soc_camera_queryctrl, | |
1467 | .vidioc_g_ctrl = soc_camera_g_ctrl, | |
1468 | .vidioc_s_ctrl = soc_camera_s_ctrl, | |
1469 | .vidioc_cropcap = soc_camera_cropcap, | |
1470 | .vidioc_g_crop = soc_camera_g_crop, | |
1471 | .vidioc_s_crop = soc_camera_s_crop, | |
c9f6ef69 GL |
1472 | .vidioc_g_parm = soc_camera_g_parm, |
1473 | .vidioc_s_parm = soc_camera_s_parm, | |
a399810c HV |
1474 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, |
1475 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1476 | .vidioc_g_register = soc_camera_g_register, | |
1477 | .vidioc_s_register = soc_camera_s_register, | |
1478 | #endif | |
1479 | }; | |
1480 | ||
40e2e092 | 1481 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef GL |
1482 | { |
1483 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
40e2e092 | 1484 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 1485 | |
e55222ef | 1486 | if (!vdev) |
40e2e092 | 1487 | return -ENOMEM; |
e55222ef GL |
1488 | |
1489 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1490 | |
5e85e732 | 1491 | vdev->parent = &icd->dev; |
e55222ef GL |
1492 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1493 | vdev->fops = &soc_camera_fops; | |
a399810c | 1494 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 1495 | vdev->release = video_device_release; |
40e2e092 | 1496 | vdev->tvnorms = V4L2_STD_UNKNOWN; |
e55222ef | 1497 | |
e55222ef GL |
1498 | icd->vdev = vdev; |
1499 | ||
1500 | return 0; | |
40e2e092 | 1501 | } |
e55222ef | 1502 | |
40e2e092 | 1503 | /* |
979ea1dd | 1504 | * Called from soc_camera_probe() above (with .video_lock held???) |
40e2e092 | 1505 | */ |
979ea1dd | 1506 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 1507 | { |
4f9fb5ed | 1508 | struct device_type *type = icd->vdev->dev.type; |
979ea1dd | 1509 | int ret; |
40e2e092 GL |
1510 | |
1511 | if (!icd->dev.parent) | |
1512 | return -ENODEV; | |
1513 | ||
1514 | if (!icd->ops || | |
40e2e092 GL |
1515 | !icd->ops->query_bus_param || |
1516 | !icd->ops->set_bus_param) | |
1517 | return -EINVAL; | |
1518 | ||
46b21094 | 1519 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd GL |
1520 | if (ret < 0) { |
1521 | dev_err(&icd->dev, "video_register_device failed: %d\n", ret); | |
1522 | return ret; | |
1523 | } | |
40e2e092 | 1524 | |
4f9fb5ed MCC |
1525 | /* Restore device type, possibly set by the subdevice driver */ |
1526 | icd->vdev->dev.type = type; | |
1527 | ||
979ea1dd | 1528 | return 0; |
e55222ef | 1529 | } |
e55222ef | 1530 | |
40e2e092 | 1531 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 1532 | { |
40e2e092 GL |
1533 | struct soc_camera_link *icl = pdev->dev.platform_data; |
1534 | struct soc_camera_device *icd; | |
c41debaf | 1535 | int ret; |
0fd327bd | 1536 | |
40e2e092 GL |
1537 | if (!icl) |
1538 | return -EINVAL; | |
0fd327bd | 1539 | |
40e2e092 GL |
1540 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); |
1541 | if (!icd) | |
1542 | return -ENOMEM; | |
0fd327bd | 1543 | |
40e2e092 | 1544 | icd->iface = icl->bus_id; |
979ea1dd | 1545 | icd->pdev = &pdev->dev; |
40e2e092 | 1546 | platform_set_drvdata(pdev, icd); |
0fd327bd | 1547 | |
40e2e092 GL |
1548 | ret = soc_camera_device_register(icd); |
1549 | if (ret < 0) | |
1550 | goto escdevreg; | |
0fd327bd | 1551 | |
64ff9ba5 GL |
1552 | soc_camera_device_init(&icd->dev, icl); |
1553 | ||
6a6c8786 GL |
1554 | icd->user_width = DEFAULT_WIDTH; |
1555 | icd->user_height = DEFAULT_HEIGHT; | |
1556 | ||
40e2e092 | 1557 | return 0; |
0fd327bd | 1558 | |
40e2e092 GL |
1559 | escdevreg: |
1560 | kfree(icd); | |
0fd327bd | 1561 | |
40e2e092 | 1562 | return ret; |
c41debaf | 1563 | } |
0fd327bd | 1564 | |
5d28d525 GL |
1565 | /* |
1566 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 1567 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
1568 | * been unloaded already |
1569 | */ | |
40e2e092 | 1570 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 1571 | { |
40e2e092 | 1572 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
c41debaf | 1573 | |
40e2e092 | 1574 | if (!icd) |
c41debaf GL |
1575 | return -EINVAL; |
1576 | ||
40e2e092 | 1577 | soc_camera_device_unregister(icd); |
c41debaf | 1578 | |
40e2e092 | 1579 | kfree(icd); |
c41debaf | 1580 | |
0fd327bd GL |
1581 | return 0; |
1582 | } | |
1583 | ||
1584 | static struct platform_driver __refdata soc_camera_pdrv = { | |
40e2e092 GL |
1585 | .remove = __devexit_p(soc_camera_pdrv_remove), |
1586 | .driver = { | |
1587 | .name = "soc-camera-pdrv", | |
1588 | .owner = THIS_MODULE, | |
0fd327bd GL |
1589 | }, |
1590 | }; | |
1591 | ||
e55222ef GL |
1592 | static int __init soc_camera_init(void) |
1593 | { | |
1594 | int ret = bus_register(&soc_camera_bus_type); | |
1595 | if (ret) | |
1596 | return ret; | |
1597 | ret = driver_register(&ic_drv); | |
1598 | if (ret) | |
1599 | goto edrvr; | |
e55222ef | 1600 | |
40e2e092 | 1601 | ret = platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
0fd327bd GL |
1602 | if (ret) |
1603 | goto epdr; | |
1604 | ||
e55222ef GL |
1605 | return 0; |
1606 | ||
0fd327bd GL |
1607 | epdr: |
1608 | driver_unregister(&ic_drv); | |
e55222ef GL |
1609 | edrvr: |
1610 | bus_unregister(&soc_camera_bus_type); | |
1611 | return ret; | |
1612 | } | |
1613 | ||
1614 | static void __exit soc_camera_exit(void) | |
1615 | { | |
0fd327bd | 1616 | platform_driver_unregister(&soc_camera_pdrv); |
e55222ef GL |
1617 | driver_unregister(&ic_drv); |
1618 | bus_unregister(&soc_camera_bus_type); | |
1619 | } | |
1620 | ||
1621 | module_init(soc_camera_init); | |
1622 | module_exit(soc_camera_exit); | |
1623 | ||
1624 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1625 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1626 | MODULE_LICENSE("GPL"); | |
0fd327bd | 1627 | MODULE_ALIAS("platform:soc-camera-pdrv"); |