diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
---|---|---|
committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/media/video/soc_camera.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/media/video/soc_camera.c')
-rw-r--r-- | drivers/media/video/soc_camera.c | 1523 |
1 files changed, 1523 insertions, 0 deletions
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c new file mode 100644 index 00000000000..5bdfe7e16bc --- /dev/null +++ b/drivers/media/video/soc_camera.c | |||
@@ -0,0 +1,1523 @@ | |||
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 | |||
19 | #include <linux/device.h> | ||
20 | #include <linux/err.h> | ||
21 | #include <linux/i2c.h> | ||
22 | #include <linux/init.h> | ||
23 | #include <linux/list.h> | ||
24 | #include <linux/mutex.h> | ||
25 | #include <linux/module.h> | ||
26 | #include <linux/platform_device.h> | ||
27 | #include <linux/regulator/consumer.h> | ||
28 | #include <linux/slab.h> | ||
29 | #include <linux/pm_runtime.h> | ||
30 | #include <linux/vmalloc.h> | ||
31 | |||
32 | #include <media/soc_camera.h> | ||
33 | #include <media/v4l2-common.h> | ||
34 | #include <media/v4l2-ioctl.h> | ||
35 | #include <media/v4l2-dev.h> | ||
36 | #include <media/videobuf-core.h> | ||
37 | #include <media/videobuf2-core.h> | ||
38 | #include <media/soc_mediabus.h> | ||
39 | |||
40 | /* Default to VGA resolution */ | ||
41 | #define DEFAULT_WIDTH 640 | ||
42 | #define DEFAULT_HEIGHT 480 | ||
43 | |||
44 | #define is_streaming(ici, icd) \ | ||
45 | (((ici)->ops->init_videobuf) ? \ | ||
46 | (icd)->vb_vidq.streaming : \ | ||
47 | vb2_is_streaming(&(icd)->vb2_vidq)) | ||
48 | |||
49 | static LIST_HEAD(hosts); | ||
50 | static LIST_HEAD(devices); | ||
51 | static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ | ||
52 | |||
53 | static int soc_camera_power_set(struct soc_camera_device *icd, | ||
54 | struct soc_camera_link *icl, | ||
55 | int power_on) | ||
56 | { | ||
57 | int ret; | ||
58 | |||
59 | if (power_on) { | ||
60 | ret = regulator_bulk_enable(icl->num_regulators, | ||
61 | icl->regulators); | ||
62 | if (ret < 0) { | ||
63 | dev_err(icd->pdev, "Cannot enable regulators\n"); | ||
64 | return ret; | ||
65 | } | ||
66 | |||
67 | if (icl->power) | ||
68 | ret = icl->power(icd->pdev, power_on); | ||
69 | if (ret < 0) { | ||
70 | dev_err(icd->pdev, | ||
71 | "Platform failed to power-on the camera.\n"); | ||
72 | |||
73 | regulator_bulk_disable(icl->num_regulators, | ||
74 | icl->regulators); | ||
75 | return ret; | ||
76 | } | ||
77 | } else { | ||
78 | ret = 0; | ||
79 | if (icl->power) | ||
80 | ret = icl->power(icd->pdev, 0); | ||
81 | if (ret < 0) { | ||
82 | dev_err(icd->pdev, | ||
83 | "Platform failed to power-off the camera.\n"); | ||
84 | return ret; | ||
85 | } | ||
86 | |||
87 | ret = regulator_bulk_disable(icl->num_regulators, | ||
88 | icl->regulators); | ||
89 | if (ret < 0) { | ||
90 | dev_err(icd->pdev, "Cannot disable regulators\n"); | ||
91 | return ret; | ||
92 | } | ||
93 | } | ||
94 | |||
95 | return 0; | ||
96 | } | ||
97 | |||
98 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( | ||
99 | struct soc_camera_device *icd, unsigned int fourcc) | ||
100 | { | ||
101 | unsigned int i; | ||
102 | |||
103 | for (i = 0; i < icd->num_user_formats; i++) | ||
104 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | ||
105 | return icd->user_formats + i; | ||
106 | return NULL; | ||
107 | } | ||
108 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | ||
109 | |||
110 | /** | ||
111 | * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | ||
112 | * @icl: camera platform parameters | ||
113 | * @flags: flags to be inverted according to platform configuration | ||
114 | * @return: resulting flags | ||
115 | */ | ||
116 | unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, | ||
117 | unsigned long flags) | ||
118 | { | ||
119 | unsigned long f; | ||
120 | |||
121 | /* If only one of the two polarities is supported, switch to the opposite */ | ||
122 | if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { | ||
123 | f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); | ||
124 | if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW) | ||
125 | flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW; | ||
126 | } | ||
127 | |||
128 | if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { | ||
129 | f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); | ||
130 | if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW) | ||
131 | flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW; | ||
132 | } | ||
133 | |||
134 | if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { | ||
135 | f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); | ||
136 | if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING) | ||
137 | flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING; | ||
138 | } | ||
139 | |||
140 | return flags; | ||
141 | } | ||
142 | EXPORT_SYMBOL(soc_camera_apply_sensor_flags); | ||
143 | |||
144 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ | ||
145 | ((x) >> 24) & 0xff | ||
146 | |||
147 | static int soc_camera_try_fmt(struct soc_camera_device *icd, | ||
148 | struct v4l2_format *f) | ||
149 | { | ||
150 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
151 | struct v4l2_pix_format *pix = &f->fmt.pix; | ||
152 | int ret; | ||
153 | |||
154 | dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n", | ||
155 | pixfmtstr(pix->pixelformat), pix->width, pix->height); | ||
156 | |||
157 | pix->bytesperline = 0; | ||
158 | pix->sizeimage = 0; | ||
159 | |||
160 | ret = ici->ops->try_fmt(icd, f); | ||
161 | if (ret < 0) | ||
162 | return ret; | ||
163 | |||
164 | if (!pix->sizeimage) { | ||
165 | if (!pix->bytesperline) { | ||
166 | const struct soc_camera_format_xlate *xlate; | ||
167 | |||
168 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | ||
169 | if (!xlate) | ||
170 | return -EINVAL; | ||
171 | |||
172 | ret = soc_mbus_bytes_per_line(pix->width, | ||
173 | xlate->host_fmt); | ||
174 | if (ret > 0) | ||
175 | pix->bytesperline = ret; | ||
176 | } | ||
177 | if (pix->bytesperline) | ||
178 | pix->sizeimage = pix->bytesperline * pix->height; | ||
179 | } | ||
180 | |||
181 | return 0; | ||
182 | } | ||
183 | |||
184 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, | ||
185 | struct v4l2_format *f) | ||
186 | { | ||
187 | struct soc_camera_device *icd = file->private_data; | ||
188 | |||
189 | WARN_ON(priv != file->private_data); | ||
190 | |||
191 | /* Only single-plane capture is supported so far */ | ||
192 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
193 | return -EINVAL; | ||
194 | |||
195 | /* limit format to hardware capabilities */ | ||
196 | return soc_camera_try_fmt(icd, f); | ||
197 | } | ||
198 | |||
199 | static int soc_camera_enum_input(struct file *file, void *priv, | ||
200 | struct v4l2_input *inp) | ||
201 | { | ||
202 | if (inp->index != 0) | ||
203 | return -EINVAL; | ||
204 | |||
205 | /* default is camera */ | ||
206 | inp->type = V4L2_INPUT_TYPE_CAMERA; | ||
207 | inp->std = V4L2_STD_UNKNOWN; | ||
208 | strcpy(inp->name, "Camera"); | ||
209 | |||
210 | return 0; | ||
211 | } | ||
212 | |||
213 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | ||
214 | { | ||
215 | *i = 0; | ||
216 | |||
217 | return 0; | ||
218 | } | ||
219 | |||
220 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | ||
221 | { | ||
222 | if (i > 0) | ||
223 | return -EINVAL; | ||
224 | |||
225 | return 0; | ||
226 | } | ||
227 | |||
228 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | ||
229 | { | ||
230 | struct soc_camera_device *icd = file->private_data; | ||
231 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
232 | |||
233 | return v4l2_subdev_call(sd, core, s_std, *a); | ||
234 | } | ||
235 | |||
236 | static int soc_camera_enum_fsizes(struct file *file, void *fh, | ||
237 | struct v4l2_frmsizeenum *fsize) | ||
238 | { | ||
239 | struct soc_camera_device *icd = file->private_data; | ||
240 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
241 | |||
242 | return ici->ops->enum_fsizes(icd, fsize); | ||
243 | } | ||
244 | |||
245 | static int soc_camera_reqbufs(struct file *file, void *priv, | ||
246 | struct v4l2_requestbuffers *p) | ||
247 | { | ||
248 | int ret; | ||
249 | struct soc_camera_device *icd = file->private_data; | ||
250 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
251 | |||
252 | WARN_ON(priv != file->private_data); | ||
253 | |||
254 | if (icd->streamer && icd->streamer != file) | ||
255 | return -EBUSY; | ||
256 | |||
257 | if (ici->ops->init_videobuf) { | ||
258 | ret = videobuf_reqbufs(&icd->vb_vidq, p); | ||
259 | if (ret < 0) | ||
260 | return ret; | ||
261 | |||
262 | ret = ici->ops->reqbufs(icd, p); | ||
263 | } else { | ||
264 | ret = vb2_reqbufs(&icd->vb2_vidq, p); | ||
265 | } | ||
266 | |||
267 | if (!ret && !icd->streamer) | ||
268 | icd->streamer = file; | ||
269 | |||
270 | return ret; | ||
271 | } | ||
272 | |||
273 | static int soc_camera_querybuf(struct file *file, void *priv, | ||
274 | struct v4l2_buffer *p) | ||
275 | { | ||
276 | struct soc_camera_device *icd = file->private_data; | ||
277 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
278 | |||
279 | WARN_ON(priv != file->private_data); | ||
280 | |||
281 | if (ici->ops->init_videobuf) | ||
282 | return videobuf_querybuf(&icd->vb_vidq, p); | ||
283 | else | ||
284 | return vb2_querybuf(&icd->vb2_vidq, p); | ||
285 | } | ||
286 | |||
287 | static int soc_camera_qbuf(struct file *file, void *priv, | ||
288 | struct v4l2_buffer *p) | ||
289 | { | ||
290 | struct soc_camera_device *icd = file->private_data; | ||
291 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
292 | |||
293 | WARN_ON(priv != file->private_data); | ||
294 | |||
295 | if (icd->streamer != file) | ||
296 | return -EBUSY; | ||
297 | |||
298 | if (ici->ops->init_videobuf) | ||
299 | return videobuf_qbuf(&icd->vb_vidq, p); | ||
300 | else | ||
301 | return vb2_qbuf(&icd->vb2_vidq, p); | ||
302 | } | ||
303 | |||
304 | static int soc_camera_dqbuf(struct file *file, void *priv, | ||
305 | struct v4l2_buffer *p) | ||
306 | { | ||
307 | struct soc_camera_device *icd = file->private_data; | ||
308 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
309 | |||
310 | WARN_ON(priv != file->private_data); | ||
311 | |||
312 | if (icd->streamer != file) | ||
313 | return -EBUSY; | ||
314 | |||
315 | if (ici->ops->init_videobuf) | ||
316 | return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); | ||
317 | else | ||
318 | return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK); | ||
319 | } | ||
320 | |||
321 | /* Always entered with .video_lock held */ | ||
322 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) | ||
323 | { | ||
324 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
325 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
326 | unsigned int i, fmts = 0, raw_fmts = 0; | ||
327 | int ret; | ||
328 | enum v4l2_mbus_pixelcode code; | ||
329 | |||
330 | while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) | ||
331 | raw_fmts++; | ||
332 | |||
333 | if (!ici->ops->get_formats) | ||
334 | /* | ||
335 | * Fallback mode - the host will have to serve all | ||
336 | * sensor-provided formats one-to-one to the user | ||
337 | */ | ||
338 | fmts = raw_fmts; | ||
339 | else | ||
340 | /* | ||
341 | * First pass - only count formats this host-sensor | ||
342 | * configuration can provide | ||
343 | */ | ||
344 | for (i = 0; i < raw_fmts; i++) { | ||
345 | ret = ici->ops->get_formats(icd, i, NULL); | ||
346 | if (ret < 0) | ||
347 | return ret; | ||
348 | fmts += ret; | ||
349 | } | ||
350 | |||
351 | if (!fmts) | ||
352 | return -ENXIO; | ||
353 | |||
354 | icd->user_formats = | ||
355 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | ||
356 | if (!icd->user_formats) | ||
357 | return -ENOMEM; | ||
358 | |||
359 | dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts); | ||
360 | |||
361 | /* Second pass - actually fill data formats */ | ||
362 | fmts = 0; | ||
363 | for (i = 0; i < raw_fmts; i++) | ||
364 | if (!ici->ops->get_formats) { | ||
365 | v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); | ||
366 | icd->user_formats[fmts].host_fmt = | ||
367 | soc_mbus_get_fmtdesc(code); | ||
368 | if (icd->user_formats[fmts].host_fmt) | ||
369 | icd->user_formats[fmts++].code = code; | ||
370 | } else { | ||
371 | ret = ici->ops->get_formats(icd, i, | ||
372 | &icd->user_formats[fmts]); | ||
373 | if (ret < 0) | ||
374 | goto egfmt; | ||
375 | fmts += ret; | ||
376 | } | ||
377 | |||
378 | icd->num_user_formats = fmts; | ||
379 | icd->current_fmt = &icd->user_formats[0]; | ||
380 | |||
381 | return 0; | ||
382 | |||
383 | egfmt: | ||
384 | vfree(icd->user_formats); | ||
385 | return ret; | ||
386 | } | ||
387 | |||
388 | /* Always entered with .video_lock held */ | ||
389 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) | ||
390 | { | ||
391 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
392 | |||
393 | if (ici->ops->put_formats) | ||
394 | ici->ops->put_formats(icd); | ||
395 | icd->current_fmt = NULL; | ||
396 | icd->num_user_formats = 0; | ||
397 | vfree(icd->user_formats); | ||
398 | icd->user_formats = NULL; | ||
399 | } | ||
400 | |||
401 | /* Called with .vb_lock held, or from the first open(2), see comment there */ | ||
402 | static int soc_camera_set_fmt(struct soc_camera_device *icd, | ||
403 | struct v4l2_format *f) | ||
404 | { | ||
405 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
406 | struct v4l2_pix_format *pix = &f->fmt.pix; | ||
407 | int ret; | ||
408 | |||
409 | dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n", | ||
410 | pixfmtstr(pix->pixelformat), pix->width, pix->height); | ||
411 | |||
412 | /* We always call try_fmt() before set_fmt() or set_crop() */ | ||
413 | ret = soc_camera_try_fmt(icd, f); | ||
414 | if (ret < 0) | ||
415 | return ret; | ||
416 | |||
417 | ret = ici->ops->set_fmt(icd, f); | ||
418 | if (ret < 0) { | ||
419 | return ret; | ||
420 | } else if (!icd->current_fmt || | ||
421 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { | ||
422 | dev_err(icd->pdev, | ||
423 | "Host driver hasn't set up current format correctly!\n"); | ||
424 | return -EINVAL; | ||
425 | } | ||
426 | |||
427 | icd->user_width = pix->width; | ||
428 | icd->user_height = pix->height; | ||
429 | icd->bytesperline = pix->bytesperline; | ||
430 | icd->sizeimage = pix->sizeimage; | ||
431 | icd->colorspace = pix->colorspace; | ||
432 | icd->field = pix->field; | ||
433 | if (ici->ops->init_videobuf) | ||
434 | icd->vb_vidq.field = pix->field; | ||
435 | |||
436 | dev_dbg(icd->pdev, "set width: %d height: %d\n", | ||
437 | icd->user_width, icd->user_height); | ||
438 | |||
439 | /* set physical bus parameters */ | ||
440 | return ici->ops->set_bus_param(icd, pix->pixelformat); | ||
441 | } | ||
442 | |||
443 | static int soc_camera_open(struct file *file) | ||
444 | { | ||
445 | struct video_device *vdev = video_devdata(file); | ||
446 | struct soc_camera_device *icd = dev_get_drvdata(vdev->parent); | ||
447 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
448 | struct soc_camera_host *ici; | ||
449 | int ret; | ||
450 | |||
451 | if (!icd->ops) | ||
452 | /* No device driver attached */ | ||
453 | return -ENODEV; | ||
454 | |||
455 | ici = to_soc_camera_host(icd->parent); | ||
456 | |||
457 | if (!try_module_get(ici->ops->owner)) { | ||
458 | dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); | ||
459 | return -EINVAL; | ||
460 | } | ||
461 | |||
462 | icd->use_count++; | ||
463 | |||
464 | /* Now we really have to activate the camera */ | ||
465 | if (icd->use_count == 1) { | ||
466 | /* Restore parameters before the last close() per V4L2 API */ | ||
467 | struct v4l2_format f = { | ||
468 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | ||
469 | .fmt.pix = { | ||
470 | .width = icd->user_width, | ||
471 | .height = icd->user_height, | ||
472 | .field = icd->field, | ||
473 | .colorspace = icd->colorspace, | ||
474 | .pixelformat = | ||
475 | icd->current_fmt->host_fmt->fourcc, | ||
476 | }, | ||
477 | }; | ||
478 | |||
479 | ret = soc_camera_power_set(icd, icl, 1); | ||
480 | if (ret < 0) | ||
481 | goto epower; | ||
482 | |||
483 | /* The camera could have been already on, try to reset */ | ||
484 | if (icl->reset) | ||
485 | icl->reset(icd->pdev); | ||
486 | |||
487 | ret = ici->ops->add(icd); | ||
488 | if (ret < 0) { | ||
489 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); | ||
490 | goto eiciadd; | ||
491 | } | ||
492 | |||
493 | pm_runtime_enable(&icd->vdev->dev); | ||
494 | ret = pm_runtime_resume(&icd->vdev->dev); | ||
495 | if (ret < 0 && ret != -ENOSYS) | ||
496 | goto eresume; | ||
497 | |||
498 | /* | ||
499 | * Try to configure with default parameters. Notice: this is the | ||
500 | * very first open, so, we cannot race against other calls, | ||
501 | * apart from someone else calling open() simultaneously, but | ||
502 | * .video_lock is protecting us against it. | ||
503 | */ | ||
504 | ret = soc_camera_set_fmt(icd, &f); | ||
505 | if (ret < 0) | ||
506 | goto esfmt; | ||
507 | |||
508 | if (ici->ops->init_videobuf) { | ||
509 | ici->ops->init_videobuf(&icd->vb_vidq, icd); | ||
510 | } else { | ||
511 | ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); | ||
512 | if (ret < 0) | ||
513 | goto einitvb; | ||
514 | } | ||
515 | } | ||
516 | |||
517 | file->private_data = icd; | ||
518 | dev_dbg(icd->pdev, "camera device open\n"); | ||
519 | |||
520 | return 0; | ||
521 | |||
522 | /* | ||
523 | * First four errors are entered with the .video_lock held | ||
524 | * and use_count == 1 | ||
525 | */ | ||
526 | einitvb: | ||
527 | esfmt: | ||
528 | pm_runtime_disable(&icd->vdev->dev); | ||
529 | eresume: | ||
530 | ici->ops->remove(icd); | ||
531 | eiciadd: | ||
532 | soc_camera_power_set(icd, icl, 0); | ||
533 | epower: | ||
534 | icd->use_count--; | ||
535 | module_put(ici->ops->owner); | ||
536 | |||
537 | return ret; | ||
538 | } | ||
539 | |||
540 | static int soc_camera_close(struct file *file) | ||
541 | { | ||
542 | struct soc_camera_device *icd = file->private_data; | ||
543 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
544 | |||
545 | icd->use_count--; | ||
546 | if (!icd->use_count) { | ||
547 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
548 | |||
549 | pm_runtime_suspend(&icd->vdev->dev); | ||
550 | pm_runtime_disable(&icd->vdev->dev); | ||
551 | |||
552 | ici->ops->remove(icd); | ||
553 | if (ici->ops->init_videobuf2) | ||
554 | vb2_queue_release(&icd->vb2_vidq); | ||
555 | |||
556 | soc_camera_power_set(icd, icl, 0); | ||
557 | } | ||
558 | |||
559 | if (icd->streamer == file) | ||
560 | icd->streamer = NULL; | ||
561 | |||
562 | module_put(ici->ops->owner); | ||
563 | |||
564 | dev_dbg(icd->pdev, "camera device close\n"); | ||
565 | |||
566 | return 0; | ||
567 | } | ||
568 | |||
569 | static ssize_t soc_camera_read(struct file *file, char __user *buf, | ||
570 | size_t count, loff_t *ppos) | ||
571 | { | ||
572 | struct soc_camera_device *icd = file->private_data; | ||
573 | int err = -EINVAL; | ||
574 | |||
575 | dev_err(icd->pdev, "camera device read not implemented\n"); | ||
576 | |||
577 | return err; | ||
578 | } | ||
579 | |||
580 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | ||
581 | { | ||
582 | struct soc_camera_device *icd = file->private_data; | ||
583 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
584 | int err; | ||
585 | |||
586 | dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | ||
587 | |||
588 | if (icd->streamer != file) | ||
589 | return -EBUSY; | ||
590 | |||
591 | if (ici->ops->init_videobuf) | ||
592 | err = videobuf_mmap_mapper(&icd->vb_vidq, vma); | ||
593 | else | ||
594 | err = vb2_mmap(&icd->vb2_vidq, vma); | ||
595 | |||
596 | dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", | ||
597 | (unsigned long)vma->vm_start, | ||
598 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | ||
599 | err); | ||
600 | |||
601 | return err; | ||
602 | } | ||
603 | |||
604 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | ||
605 | { | ||
606 | struct soc_camera_device *icd = file->private_data; | ||
607 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
608 | |||
609 | if (icd->streamer != file) | ||
610 | return -EBUSY; | ||
611 | |||
612 | if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) { | ||
613 | dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); | ||
614 | return POLLERR; | ||
615 | } | ||
616 | |||
617 | return ici->ops->poll(file, pt); | ||
618 | } | ||
619 | |||
620 | void soc_camera_lock(struct vb2_queue *vq) | ||
621 | { | ||
622 | struct soc_camera_device *icd = vb2_get_drv_priv(vq); | ||
623 | mutex_lock(&icd->video_lock); | ||
624 | } | ||
625 | EXPORT_SYMBOL(soc_camera_lock); | ||
626 | |||
627 | void soc_camera_unlock(struct vb2_queue *vq) | ||
628 | { | ||
629 | struct soc_camera_device *icd = vb2_get_drv_priv(vq); | ||
630 | mutex_unlock(&icd->video_lock); | ||
631 | } | ||
632 | EXPORT_SYMBOL(soc_camera_unlock); | ||
633 | |||
634 | static struct v4l2_file_operations soc_camera_fops = { | ||
635 | .owner = THIS_MODULE, | ||
636 | .open = soc_camera_open, | ||
637 | .release = soc_camera_close, | ||
638 | .unlocked_ioctl = video_ioctl2, | ||
639 | .read = soc_camera_read, | ||
640 | .mmap = soc_camera_mmap, | ||
641 | .poll = soc_camera_poll, | ||
642 | }; | ||
643 | |||
644 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, | ||
645 | struct v4l2_format *f) | ||
646 | { | ||
647 | struct soc_camera_device *icd = file->private_data; | ||
648 | int ret; | ||
649 | |||
650 | WARN_ON(priv != file->private_data); | ||
651 | |||
652 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | ||
653 | dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type); | ||
654 | return -EINVAL; | ||
655 | } | ||
656 | |||
657 | if (icd->streamer && icd->streamer != file) | ||
658 | return -EBUSY; | ||
659 | |||
660 | if (is_streaming(to_soc_camera_host(icd->parent), icd)) { | ||
661 | dev_err(icd->pdev, "S_FMT denied: queue initialised\n"); | ||
662 | return -EBUSY; | ||
663 | } | ||
664 | |||
665 | ret = soc_camera_set_fmt(icd, f); | ||
666 | |||
667 | if (!ret && !icd->streamer) | ||
668 | icd->streamer = file; | ||
669 | |||
670 | return ret; | ||
671 | } | ||
672 | |||
673 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, | ||
674 | struct v4l2_fmtdesc *f) | ||
675 | { | ||
676 | struct soc_camera_device *icd = file->private_data; | ||
677 | const struct soc_mbus_pixelfmt *format; | ||
678 | |||
679 | WARN_ON(priv != file->private_data); | ||
680 | |||
681 | if (f->index >= icd->num_user_formats) | ||
682 | return -EINVAL; | ||
683 | |||
684 | format = icd->user_formats[f->index].host_fmt; | ||
685 | |||
686 | if (format->name) | ||
687 | strlcpy(f->description, format->name, sizeof(f->description)); | ||
688 | f->pixelformat = format->fourcc; | ||
689 | return 0; | ||
690 | } | ||
691 | |||
692 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, | ||
693 | struct v4l2_format *f) | ||
694 | { | ||
695 | struct soc_camera_device *icd = file->private_data; | ||
696 | struct v4l2_pix_format *pix = &f->fmt.pix; | ||
697 | |||
698 | WARN_ON(priv != file->private_data); | ||
699 | |||
700 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
701 | return -EINVAL; | ||
702 | |||
703 | pix->width = icd->user_width; | ||
704 | pix->height = icd->user_height; | ||
705 | pix->bytesperline = icd->bytesperline; | ||
706 | pix->sizeimage = icd->sizeimage; | ||
707 | pix->field = icd->field; | ||
708 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; | ||
709 | pix->colorspace = icd->colorspace; | ||
710 | dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n", | ||
711 | icd->current_fmt->host_fmt->fourcc); | ||
712 | return 0; | ||
713 | } | ||
714 | |||
715 | static int soc_camera_querycap(struct file *file, void *priv, | ||
716 | struct v4l2_capability *cap) | ||
717 | { | ||
718 | struct soc_camera_device *icd = file->private_data; | ||
719 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
720 | |||
721 | WARN_ON(priv != file->private_data); | ||
722 | |||
723 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | ||
724 | return ici->ops->querycap(ici, cap); | ||
725 | } | ||
726 | |||
727 | static int soc_camera_streamon(struct file *file, void *priv, | ||
728 | enum v4l2_buf_type i) | ||
729 | { | ||
730 | struct soc_camera_device *icd = file->private_data; | ||
731 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
732 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
733 | int ret; | ||
734 | |||
735 | WARN_ON(priv != file->private_data); | ||
736 | |||
737 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
738 | return -EINVAL; | ||
739 | |||
740 | if (icd->streamer != file) | ||
741 | return -EBUSY; | ||
742 | |||
743 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | ||
744 | if (ici->ops->init_videobuf) | ||
745 | ret = videobuf_streamon(&icd->vb_vidq); | ||
746 | else | ||
747 | ret = vb2_streamon(&icd->vb2_vidq, i); | ||
748 | |||
749 | if (!ret) | ||
750 | v4l2_subdev_call(sd, video, s_stream, 1); | ||
751 | |||
752 | return ret; | ||
753 | } | ||
754 | |||
755 | static int soc_camera_streamoff(struct file *file, void *priv, | ||
756 | enum v4l2_buf_type i) | ||
757 | { | ||
758 | struct soc_camera_device *icd = file->private_data; | ||
759 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
760 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
761 | |||
762 | WARN_ON(priv != file->private_data); | ||
763 | |||
764 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
765 | return -EINVAL; | ||
766 | |||
767 | if (icd->streamer != file) | ||
768 | return -EBUSY; | ||
769 | |||
770 | /* | ||
771 | * This calls buf_release from host driver's videobuf_queue_ops for all | ||
772 | * remaining buffers. When the last buffer is freed, stop capture | ||
773 | */ | ||
774 | if (ici->ops->init_videobuf) | ||
775 | videobuf_streamoff(&icd->vb_vidq); | ||
776 | else | ||
777 | vb2_streamoff(&icd->vb2_vidq, i); | ||
778 | |||
779 | v4l2_subdev_call(sd, video, s_stream, 0); | ||
780 | |||
781 | return 0; | ||
782 | } | ||
783 | |||
784 | static int soc_camera_queryctrl(struct file *file, void *priv, | ||
785 | struct v4l2_queryctrl *qc) | ||
786 | { | ||
787 | struct soc_camera_device *icd = file->private_data; | ||
788 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
789 | int i; | ||
790 | |||
791 | WARN_ON(priv != file->private_data); | ||
792 | |||
793 | if (!qc->id) | ||
794 | return -EINVAL; | ||
795 | |||
796 | /* First check host controls */ | ||
797 | for (i = 0; i < ici->ops->num_controls; i++) | ||
798 | if (qc->id == ici->ops->controls[i].id) { | ||
799 | memcpy(qc, &(ici->ops->controls[i]), | ||
800 | sizeof(*qc)); | ||
801 | return 0; | ||
802 | } | ||
803 | |||
804 | /* Then device controls */ | ||
805 | for (i = 0; i < icd->ops->num_controls; i++) | ||
806 | if (qc->id == icd->ops->controls[i].id) { | ||
807 | memcpy(qc, &(icd->ops->controls[i]), | ||
808 | sizeof(*qc)); | ||
809 | return 0; | ||
810 | } | ||
811 | |||
812 | return -EINVAL; | ||
813 | } | ||
814 | |||
815 | static int soc_camera_g_ctrl(struct file *file, void *priv, | ||
816 | struct v4l2_control *ctrl) | ||
817 | { | ||
818 | struct soc_camera_device *icd = file->private_data; | ||
819 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
820 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
821 | int ret; | ||
822 | |||
823 | WARN_ON(priv != file->private_data); | ||
824 | |||
825 | if (ici->ops->get_ctrl) { | ||
826 | ret = ici->ops->get_ctrl(icd, ctrl); | ||
827 | if (ret != -ENOIOCTLCMD) | ||
828 | return ret; | ||
829 | } | ||
830 | |||
831 | return v4l2_subdev_call(sd, core, g_ctrl, ctrl); | ||
832 | } | ||
833 | |||
834 | static int soc_camera_s_ctrl(struct file *file, void *priv, | ||
835 | struct v4l2_control *ctrl) | ||
836 | { | ||
837 | struct soc_camera_device *icd = file->private_data; | ||
838 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
839 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
840 | int ret; | ||
841 | |||
842 | WARN_ON(priv != file->private_data); | ||
843 | |||
844 | if (ici->ops->set_ctrl) { | ||
845 | ret = ici->ops->set_ctrl(icd, ctrl); | ||
846 | if (ret != -ENOIOCTLCMD) | ||
847 | return ret; | ||
848 | } | ||
849 | |||
850 | return v4l2_subdev_call(sd, core, s_ctrl, ctrl); | ||
851 | } | ||
852 | |||
853 | static int soc_camera_cropcap(struct file *file, void *fh, | ||
854 | struct v4l2_cropcap *a) | ||
855 | { | ||
856 | struct soc_camera_device *icd = file->private_data; | ||
857 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
858 | |||
859 | return ici->ops->cropcap(icd, a); | ||
860 | } | ||
861 | |||
862 | static int soc_camera_g_crop(struct file *file, void *fh, | ||
863 | struct v4l2_crop *a) | ||
864 | { | ||
865 | struct soc_camera_device *icd = file->private_data; | ||
866 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
867 | int ret; | ||
868 | |||
869 | ret = ici->ops->get_crop(icd, a); | ||
870 | |||
871 | return ret; | ||
872 | } | ||
873 | |||
874 | /* | ||
875 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | ||
876 | * argument with the actual geometry, instead, the user shall use G_CROP to | ||
877 | * retrieve it. | ||
878 | */ | ||
879 | static int soc_camera_s_crop(struct file *file, void *fh, | ||
880 | struct v4l2_crop *a) | ||
881 | { | ||
882 | struct soc_camera_device *icd = file->private_data; | ||
883 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
884 | struct v4l2_rect *rect = &a->c; | ||
885 | struct v4l2_crop current_crop; | ||
886 | int ret; | ||
887 | |||
888 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | ||
889 | return -EINVAL; | ||
890 | |||
891 | dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n", | ||
892 | rect->width, rect->height, rect->left, rect->top); | ||
893 | |||
894 | /* If get_crop fails, we'll let host and / or client drivers decide */ | ||
895 | ret = ici->ops->get_crop(icd, ¤t_crop); | ||
896 | |||
897 | /* Prohibit window size change with initialised buffers */ | ||
898 | if (ret < 0) { | ||
899 | dev_err(icd->pdev, | ||
900 | "S_CROP denied: getting current crop failed\n"); | ||
901 | } else if ((a->c.width == current_crop.c.width && | ||
902 | a->c.height == current_crop.c.height) || | ||
903 | !is_streaming(ici, icd)) { | ||
904 | /* same size or not streaming - use .set_crop() */ | ||
905 | ret = ici->ops->set_crop(icd, a); | ||
906 | } else if (ici->ops->set_livecrop) { | ||
907 | ret = ici->ops->set_livecrop(icd, a); | ||
908 | } else { | ||
909 | dev_err(icd->pdev, | ||
910 | "S_CROP denied: queue initialised and sizes differ\n"); | ||
911 | ret = -EBUSY; | ||
912 | } | ||
913 | |||
914 | return ret; | ||
915 | } | ||
916 | |||
917 | static int soc_camera_g_parm(struct file *file, void *fh, | ||
918 | struct v4l2_streamparm *a) | ||
919 | { | ||
920 | struct soc_camera_device *icd = file->private_data; | ||
921 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
922 | |||
923 | if (ici->ops->get_parm) | ||
924 | return ici->ops->get_parm(icd, a); | ||
925 | |||
926 | return -ENOIOCTLCMD; | ||
927 | } | ||
928 | |||
929 | static int soc_camera_s_parm(struct file *file, void *fh, | ||
930 | struct v4l2_streamparm *a) | ||
931 | { | ||
932 | struct soc_camera_device *icd = file->private_data; | ||
933 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
934 | |||
935 | if (ici->ops->set_parm) | ||
936 | return ici->ops->set_parm(icd, a); | ||
937 | |||
938 | return -ENOIOCTLCMD; | ||
939 | } | ||
940 | |||
941 | static int soc_camera_g_chip_ident(struct file *file, void *fh, | ||
942 | struct v4l2_dbg_chip_ident *id) | ||
943 | { | ||
944 | struct soc_camera_device *icd = file->private_data; | ||
945 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
946 | |||
947 | return v4l2_subdev_call(sd, core, g_chip_ident, id); | ||
948 | } | ||
949 | |||
950 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
951 | static int soc_camera_g_register(struct file *file, void *fh, | ||
952 | struct v4l2_dbg_register *reg) | ||
953 | { | ||
954 | struct soc_camera_device *icd = file->private_data; | ||
955 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
956 | |||
957 | return v4l2_subdev_call(sd, core, g_register, reg); | ||
958 | } | ||
959 | |||
960 | static int soc_camera_s_register(struct file *file, void *fh, | ||
961 | struct v4l2_dbg_register *reg) | ||
962 | { | ||
963 | struct soc_camera_device *icd = file->private_data; | ||
964 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
965 | |||
966 | return v4l2_subdev_call(sd, core, s_register, reg); | ||
967 | } | ||
968 | #endif | ||
969 | |||
970 | static int soc_camera_probe(struct soc_camera_device *icd); | ||
971 | |||
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) { | ||
981 | int ret; | ||
982 | |||
983 | icd->parent = ici->v4l2_dev.dev; | ||
984 | ret = soc_camera_probe(icd); | ||
985 | } | ||
986 | } | ||
987 | |||
988 | mutex_unlock(&list_lock); | ||
989 | } | ||
990 | |||
991 | #ifdef CONFIG_I2C_BOARDINFO | ||
992 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | ||
993 | struct soc_camera_link *icl) | ||
994 | { | ||
995 | struct i2c_client *client; | ||
996 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
997 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); | ||
998 | struct v4l2_subdev *subdev; | ||
999 | |||
1000 | if (!adap) { | ||
1001 | dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n", | ||
1002 | icl->i2c_adapter_id); | ||
1003 | goto ei2cga; | ||
1004 | } | ||
1005 | |||
1006 | icl->board_info->platform_data = icd; | ||
1007 | |||
1008 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, | ||
1009 | icl->board_info, NULL); | ||
1010 | if (!subdev) | ||
1011 | goto ei2cnd; | ||
1012 | |||
1013 | client = v4l2_get_subdevdata(subdev); | ||
1014 | |||
1015 | /* Use to_i2c_client(dev) to recover the i2c client */ | ||
1016 | icd->control = &client->dev; | ||
1017 | |||
1018 | return 0; | ||
1019 | ei2cnd: | ||
1020 | i2c_put_adapter(adap); | ||
1021 | ei2cga: | ||
1022 | return -ENODEV; | ||
1023 | } | ||
1024 | |||
1025 | static void soc_camera_free_i2c(struct soc_camera_device *icd) | ||
1026 | { | ||
1027 | struct i2c_client *client = | ||
1028 | to_i2c_client(to_soc_camera_control(icd)); | ||
1029 | struct i2c_adapter *adap = client->adapter; | ||
1030 | |||
1031 | icd->control = NULL; | ||
1032 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); | ||
1033 | i2c_unregister_device(client); | ||
1034 | i2c_put_adapter(adap); | ||
1035 | } | ||
1036 | #else | ||
1037 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | ||
1038 | #define soc_camera_free_i2c(icd) do {} while (0) | ||
1039 | #endif | ||
1040 | |||
1041 | static int soc_camera_video_start(struct soc_camera_device *icd); | ||
1042 | static int video_dev_create(struct soc_camera_device *icd); | ||
1043 | /* Called during host-driver probe */ | ||
1044 | static int soc_camera_probe(struct soc_camera_device *icd) | ||
1045 | { | ||
1046 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
1047 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
1048 | struct device *control = NULL; | ||
1049 | struct v4l2_subdev *sd; | ||
1050 | struct v4l2_mbus_framefmt mf; | ||
1051 | int ret; | ||
1052 | |||
1053 | dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev)); | ||
1054 | |||
1055 | ret = regulator_bulk_get(icd->pdev, icl->num_regulators, | ||
1056 | icl->regulators); | ||
1057 | if (ret < 0) | ||
1058 | goto ereg; | ||
1059 | |||
1060 | ret = soc_camera_power_set(icd, icl, 1); | ||
1061 | if (ret < 0) | ||
1062 | goto epower; | ||
1063 | |||
1064 | /* The camera could have been already on, try to reset */ | ||
1065 | if (icl->reset) | ||
1066 | icl->reset(icd->pdev); | ||
1067 | |||
1068 | ret = ici->ops->add(icd); | ||
1069 | if (ret < 0) | ||
1070 | goto eadd; | ||
1071 | |||
1072 | /* Must have icd->vdev before registering the device */ | ||
1073 | ret = video_dev_create(icd); | ||
1074 | if (ret < 0) | ||
1075 | goto evdc; | ||
1076 | |||
1077 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ | ||
1078 | if (icl->board_info) { | ||
1079 | ret = soc_camera_init_i2c(icd, icl); | ||
1080 | if (ret < 0) | ||
1081 | goto eadddev; | ||
1082 | } else if (!icl->add_device || !icl->del_device) { | ||
1083 | ret = -EINVAL; | ||
1084 | goto eadddev; | ||
1085 | } else { | ||
1086 | if (icl->module_name) | ||
1087 | ret = request_module(icl->module_name); | ||
1088 | |||
1089 | ret = icl->add_device(icd); | ||
1090 | if (ret < 0) | ||
1091 | goto eadddev; | ||
1092 | |||
1093 | /* | ||
1094 | * FIXME: this is racy, have to use driver-binding notification, | ||
1095 | * when it is available | ||
1096 | */ | ||
1097 | control = to_soc_camera_control(icd); | ||
1098 | if (!control || !control->driver || !dev_get_drvdata(control) || | ||
1099 | !try_module_get(control->driver->owner)) { | ||
1100 | icl->del_device(icd); | ||
1101 | goto enodrv; | ||
1102 | } | ||
1103 | } | ||
1104 | |||
1105 | sd = soc_camera_to_subdev(icd); | ||
1106 | sd->grp_id = (long)icd; | ||
1107 | |||
1108 | /* At this point client .probe() should have run already */ | ||
1109 | ret = soc_camera_init_user_formats(icd); | ||
1110 | if (ret < 0) | ||
1111 | goto eiufmt; | ||
1112 | |||
1113 | icd->field = V4L2_FIELD_ANY; | ||
1114 | |||
1115 | /* | ||
1116 | * ..._video_start() will create a device node, video_register_device() | ||
1117 | * itself is protected against concurrent open() calls, but we also have | ||
1118 | * to protect our data. | ||
1119 | */ | ||
1120 | mutex_lock(&icd->video_lock); | ||
1121 | |||
1122 | ret = soc_camera_video_start(icd); | ||
1123 | if (ret < 0) | ||
1124 | goto evidstart; | ||
1125 | |||
1126 | /* Try to improve our guess of a reasonable window format */ | ||
1127 | if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { | ||
1128 | icd->user_width = mf.width; | ||
1129 | icd->user_height = mf.height; | ||
1130 | icd->colorspace = mf.colorspace; | ||
1131 | icd->field = mf.field; | ||
1132 | } | ||
1133 | |||
1134 | ici->ops->remove(icd); | ||
1135 | |||
1136 | soc_camera_power_set(icd, icl, 0); | ||
1137 | |||
1138 | mutex_unlock(&icd->video_lock); | ||
1139 | |||
1140 | return 0; | ||
1141 | |||
1142 | evidstart: | ||
1143 | mutex_unlock(&icd->video_lock); | ||
1144 | soc_camera_free_user_formats(icd); | ||
1145 | eiufmt: | ||
1146 | if (icl->board_info) { | ||
1147 | soc_camera_free_i2c(icd); | ||
1148 | } else { | ||
1149 | icl->del_device(icd); | ||
1150 | module_put(control->driver->owner); | ||
1151 | } | ||
1152 | enodrv: | ||
1153 | eadddev: | ||
1154 | video_device_release(icd->vdev); | ||
1155 | evdc: | ||
1156 | ici->ops->remove(icd); | ||
1157 | eadd: | ||
1158 | soc_camera_power_set(icd, icl, 0); | ||
1159 | epower: | ||
1160 | regulator_bulk_free(icl->num_regulators, icl->regulators); | ||
1161 | ereg: | ||
1162 | return ret; | ||
1163 | } | ||
1164 | |||
1165 | /* | ||
1166 | * This is called on device_unregister, which only means we have to disconnect | ||
1167 | * from the host, but not remove ourselves from the device list | ||
1168 | */ | ||
1169 | static int soc_camera_remove(struct soc_camera_device *icd) | ||
1170 | { | ||
1171 | struct soc_camera_link *icl = to_soc_camera_link(icd); | ||
1172 | struct video_device *vdev = icd->vdev; | ||
1173 | |||
1174 | BUG_ON(!icd->parent); | ||
1175 | |||
1176 | if (vdev) { | ||
1177 | video_unregister_device(vdev); | ||
1178 | icd->vdev = NULL; | ||
1179 | } | ||
1180 | |||
1181 | if (icl->board_info) { | ||
1182 | soc_camera_free_i2c(icd); | ||
1183 | } else { | ||
1184 | struct device_driver *drv = to_soc_camera_control(icd)->driver; | ||
1185 | if (drv) { | ||
1186 | icl->del_device(icd); | ||
1187 | module_put(drv->owner); | ||
1188 | } | ||
1189 | } | ||
1190 | soc_camera_free_user_formats(icd); | ||
1191 | |||
1192 | regulator_bulk_free(icl->num_regulators, icl->regulators); | ||
1193 | |||
1194 | return 0; | ||
1195 | } | ||
1196 | |||
1197 | static int default_cropcap(struct soc_camera_device *icd, | ||
1198 | struct v4l2_cropcap *a) | ||
1199 | { | ||
1200 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
1201 | return v4l2_subdev_call(sd, video, cropcap, a); | ||
1202 | } | ||
1203 | |||
1204 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | ||
1205 | { | ||
1206 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
1207 | return v4l2_subdev_call(sd, video, g_crop, a); | ||
1208 | } | ||
1209 | |||
1210 | static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | ||
1211 | { | ||
1212 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
1213 | return v4l2_subdev_call(sd, video, s_crop, a); | ||
1214 | } | ||
1215 | |||
1216 | static int default_g_parm(struct soc_camera_device *icd, | ||
1217 | struct v4l2_streamparm *parm) | ||
1218 | { | ||
1219 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
1220 | return v4l2_subdev_call(sd, video, g_parm, parm); | ||
1221 | } | ||
1222 | |||
1223 | static int default_s_parm(struct soc_camera_device *icd, | ||
1224 | struct v4l2_streamparm *parm) | ||
1225 | { | ||
1226 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
1227 | return v4l2_subdev_call(sd, video, s_parm, parm); | ||
1228 | } | ||
1229 | |||
1230 | static int default_enum_fsizes(struct soc_camera_device *icd, | ||
1231 | struct v4l2_frmsizeenum *fsize) | ||
1232 | { | ||
1233 | int ret; | ||
1234 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | ||
1235 | const struct soc_camera_format_xlate *xlate; | ||
1236 | __u32 pixfmt = fsize->pixel_format; | ||
1237 | struct v4l2_frmsizeenum fsize_mbus = *fsize; | ||
1238 | |||
1239 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); | ||
1240 | if (!xlate) | ||
1241 | return -EINVAL; | ||
1242 | /* map xlate-code to pixel_format, sensor only handle xlate-code*/ | ||
1243 | fsize_mbus.pixel_format = xlate->code; | ||
1244 | |||
1245 | ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &fsize_mbus); | ||
1246 | if (ret < 0) | ||
1247 | return ret; | ||
1248 | |||
1249 | *fsize = fsize_mbus; | ||
1250 | fsize->pixel_format = pixfmt; | ||
1251 | |||
1252 | return 0; | ||
1253 | } | ||
1254 | |||
1255 | int soc_camera_host_register(struct soc_camera_host *ici) | ||
1256 | { | ||
1257 | struct soc_camera_host *ix; | ||
1258 | int ret; | ||
1259 | |||
1260 | if (!ici || !ici->ops || | ||
1261 | !ici->ops->try_fmt || | ||
1262 | !ici->ops->set_fmt || | ||
1263 | !ici->ops->set_bus_param || | ||
1264 | !ici->ops->querycap || | ||
1265 | ((!ici->ops->init_videobuf || | ||
1266 | !ici->ops->reqbufs) && | ||
1267 | !ici->ops->init_videobuf2) || | ||
1268 | !ici->ops->add || | ||
1269 | !ici->ops->remove || | ||
1270 | !ici->ops->poll || | ||
1271 | !ici->v4l2_dev.dev) | ||
1272 | return -EINVAL; | ||
1273 | |||
1274 | if (!ici->ops->set_crop) | ||
1275 | ici->ops->set_crop = default_s_crop; | ||
1276 | if (!ici->ops->get_crop) | ||
1277 | ici->ops->get_crop = default_g_crop; | ||
1278 | if (!ici->ops->cropcap) | ||
1279 | ici->ops->cropcap = default_cropcap; | ||
1280 | if (!ici->ops->set_parm) | ||
1281 | ici->ops->set_parm = default_s_parm; | ||
1282 | if (!ici->ops->get_parm) | ||
1283 | ici->ops->get_parm = default_g_parm; | ||
1284 | if (!ici->ops->enum_fsizes) | ||
1285 | ici->ops->enum_fsizes = default_enum_fsizes; | ||
1286 | |||
1287 | mutex_lock(&list_lock); | ||
1288 | list_for_each_entry(ix, &hosts, list) { | ||
1289 | if (ix->nr == ici->nr) { | ||
1290 | ret = -EBUSY; | ||
1291 | goto edevreg; | ||
1292 | } | ||
1293 | } | ||
1294 | |||
1295 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); | ||
1296 | if (ret < 0) | ||
1297 | goto edevreg; | ||
1298 | |||
1299 | list_add_tail(&ici->list, &hosts); | ||
1300 | mutex_unlock(&list_lock); | ||
1301 | |||
1302 | scan_add_host(ici); | ||
1303 | |||
1304 | return 0; | ||
1305 | |||
1306 | edevreg: | ||
1307 | mutex_unlock(&list_lock); | ||
1308 | return ret; | ||
1309 | } | ||
1310 | EXPORT_SYMBOL(soc_camera_host_register); | ||
1311 | |||
1312 | /* Unregister all clients! */ | ||
1313 | void soc_camera_host_unregister(struct soc_camera_host *ici) | ||
1314 | { | ||
1315 | struct soc_camera_device *icd; | ||
1316 | |||
1317 | mutex_lock(&list_lock); | ||
1318 | |||
1319 | list_del(&ici->list); | ||
1320 | list_for_each_entry(icd, &devices, list) | ||
1321 | if (icd->iface == ici->nr && to_soc_camera_control(icd)) | ||
1322 | soc_camera_remove(icd); | ||
1323 | |||
1324 | mutex_unlock(&list_lock); | ||
1325 | |||
1326 | v4l2_device_unregister(&ici->v4l2_dev); | ||
1327 | } | ||
1328 | EXPORT_SYMBOL(soc_camera_host_unregister); | ||
1329 | |||
1330 | /* Image capture device */ | ||
1331 | static int soc_camera_device_register(struct soc_camera_device *icd) | ||
1332 | { | ||
1333 | struct soc_camera_device *ix; | ||
1334 | int num = -1, i; | ||
1335 | |||
1336 | for (i = 0; i < 256 && num < 0; i++) { | ||
1337 | num = i; | ||
1338 | /* Check if this index is available on this interface */ | ||
1339 | list_for_each_entry(ix, &devices, list) { | ||
1340 | if (ix->iface == icd->iface && ix->devnum == i) { | ||
1341 | num = -1; | ||
1342 | break; | ||
1343 | } | ||
1344 | } | ||
1345 | } | ||
1346 | |||
1347 | if (num < 0) | ||
1348 | /* | ||
1349 | * ok, we have 256 cameras on this host... | ||
1350 | * man, stay reasonable... | ||
1351 | */ | ||
1352 | return -ENOMEM; | ||
1353 | |||
1354 | icd->devnum = num; | ||
1355 | icd->use_count = 0; | ||
1356 | icd->host_priv = NULL; | ||
1357 | mutex_init(&icd->video_lock); | ||
1358 | |||
1359 | list_add_tail(&icd->list, &devices); | ||
1360 | |||
1361 | return 0; | ||
1362 | } | ||
1363 | |||
1364 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { | ||
1365 | .vidioc_querycap = soc_camera_querycap, | ||
1366 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, | ||
1367 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, | ||
1368 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, | ||
1369 | .vidioc_enum_input = soc_camera_enum_input, | ||
1370 | .vidioc_g_input = soc_camera_g_input, | ||
1371 | .vidioc_s_input = soc_camera_s_input, | ||
1372 | .vidioc_s_std = soc_camera_s_std, | ||
1373 | .vidioc_enum_framesizes = soc_camera_enum_fsizes, | ||
1374 | .vidioc_reqbufs = soc_camera_reqbufs, | ||
1375 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, | ||
1376 | .vidioc_querybuf = soc_camera_querybuf, | ||
1377 | .vidioc_qbuf = soc_camera_qbuf, | ||
1378 | .vidioc_dqbuf = soc_camera_dqbuf, | ||
1379 | .vidioc_streamon = soc_camera_streamon, | ||
1380 | .vidioc_streamoff = soc_camera_streamoff, | ||
1381 | .vidioc_queryctrl = soc_camera_queryctrl, | ||
1382 | .vidioc_g_ctrl = soc_camera_g_ctrl, | ||
1383 | .vidioc_s_ctrl = soc_camera_s_ctrl, | ||
1384 | .vidioc_cropcap = soc_camera_cropcap, | ||
1385 | .vidioc_g_crop = soc_camera_g_crop, | ||
1386 | .vidioc_s_crop = soc_camera_s_crop, | ||
1387 | .vidioc_g_parm = soc_camera_g_parm, | ||
1388 | .vidioc_s_parm = soc_camera_s_parm, | ||
1389 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, | ||
1390 | #ifdef CONFIG_VIDEO_ADV_DEBUG | ||
1391 | .vidioc_g_register = soc_camera_g_register, | ||
1392 | .vidioc_s_register = soc_camera_s_register, | ||
1393 | #endif | ||
1394 | }; | ||
1395 | |||
1396 | static int video_dev_create(struct soc_camera_device *icd) | ||
1397 | { | ||
1398 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | ||
1399 | struct video_device *vdev = video_device_alloc(); | ||
1400 | |||
1401 | if (!vdev) | ||
1402 | return -ENOMEM; | ||
1403 | |||
1404 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | ||
1405 | |||
1406 | vdev->parent = icd->pdev; | ||
1407 | vdev->current_norm = V4L2_STD_UNKNOWN; | ||
1408 | vdev->fops = &soc_camera_fops; | ||
1409 | vdev->ioctl_ops = &soc_camera_ioctl_ops; | ||
1410 | vdev->release = video_device_release; | ||
1411 | vdev->tvnorms = V4L2_STD_UNKNOWN; | ||
1412 | vdev->lock = &icd->video_lock; | ||
1413 | |||
1414 | icd->vdev = vdev; | ||
1415 | |||
1416 | return 0; | ||
1417 | } | ||
1418 | |||
1419 | /* | ||
1420 | * Called from soc_camera_probe() above (with .video_lock held???) | ||
1421 | */ | ||
1422 | static int soc_camera_video_start(struct soc_camera_device *icd) | ||
1423 | { | ||
1424 | const struct device_type *type = icd->vdev->dev.type; | ||
1425 | int ret; | ||
1426 | |||
1427 | if (!icd->parent) | ||
1428 | return -ENODEV; | ||
1429 | |||
1430 | if (!icd->ops || | ||
1431 | !icd->ops->query_bus_param || | ||
1432 | !icd->ops->set_bus_param) | ||
1433 | return -EINVAL; | ||
1434 | |||
1435 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); | ||
1436 | if (ret < 0) { | ||
1437 | dev_err(icd->pdev, "video_register_device failed: %d\n", ret); | ||
1438 | return ret; | ||
1439 | } | ||
1440 | |||
1441 | /* Restore device type, possibly set by the subdevice driver */ | ||
1442 | icd->vdev->dev.type = type; | ||
1443 | |||
1444 | return 0; | ||
1445 | } | ||
1446 | |||
1447 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) | ||
1448 | { | ||
1449 | struct soc_camera_link *icl = pdev->dev.platform_data; | ||
1450 | struct soc_camera_device *icd; | ||
1451 | int ret; | ||
1452 | |||
1453 | if (!icl) | ||
1454 | return -EINVAL; | ||
1455 | |||
1456 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); | ||
1457 | if (!icd) | ||
1458 | return -ENOMEM; | ||
1459 | |||
1460 | icd->iface = icl->bus_id; | ||
1461 | icd->link = icl; | ||
1462 | icd->pdev = &pdev->dev; | ||
1463 | platform_set_drvdata(pdev, icd); | ||
1464 | |||
1465 | ret = soc_camera_device_register(icd); | ||
1466 | if (ret < 0) | ||
1467 | goto escdevreg; | ||
1468 | |||
1469 | icd->user_width = DEFAULT_WIDTH; | ||
1470 | icd->user_height = DEFAULT_HEIGHT; | ||
1471 | |||
1472 | return 0; | ||
1473 | |||
1474 | escdevreg: | ||
1475 | kfree(icd); | ||
1476 | |||
1477 | return ret; | ||
1478 | } | ||
1479 | |||
1480 | /* | ||
1481 | * Only called on rmmod for each platform device, since they are not | ||
1482 | * hot-pluggable. Now we know, that all our users - hosts and devices have | ||
1483 | * been unloaded already | ||
1484 | */ | ||
1485 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) | ||
1486 | { | ||
1487 | struct soc_camera_device *icd = platform_get_drvdata(pdev); | ||
1488 | |||
1489 | if (!icd) | ||
1490 | return -EINVAL; | ||
1491 | |||
1492 | list_del(&icd->list); | ||
1493 | |||
1494 | kfree(icd); | ||
1495 | |||
1496 | return 0; | ||
1497 | } | ||
1498 | |||
1499 | static struct platform_driver __refdata soc_camera_pdrv = { | ||
1500 | .remove = __devexit_p(soc_camera_pdrv_remove), | ||
1501 | .driver = { | ||
1502 | .name = "soc-camera-pdrv", | ||
1503 | .owner = THIS_MODULE, | ||
1504 | }, | ||
1505 | }; | ||
1506 | |||
1507 | static int __init soc_camera_init(void) | ||
1508 | { | ||
1509 | return platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); | ||
1510 | } | ||
1511 | |||
1512 | static void __exit soc_camera_exit(void) | ||
1513 | { | ||
1514 | platform_driver_unregister(&soc_camera_pdrv); | ||
1515 | } | ||
1516 | |||
1517 | module_init(soc_camera_init); | ||
1518 | module_exit(soc_camera_exit); | ||
1519 | |||
1520 | MODULE_DESCRIPTION("Image capture bus driver"); | ||
1521 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | ||
1522 | MODULE_LICENSE("GPL"); | ||
1523 | MODULE_ALIAS("platform:soc-camera-pdrv"); | ||