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 | ||
aee5c2f1 GL |
44 | #define is_streaming(ici, icd) \ |
45 | (((ici)->ops->init_videobuf) ? \ | |
46 | (icd)->vb_vidq.streaming : \ | |
47 | vb2_is_streaming(&(icd)->vb2_vidq)) | |
48 | ||
e55222ef GL |
49 | static LIST_HEAD(hosts); |
50 | static LIST_HEAD(devices); | |
40e2e092 | 51 | static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ |
e55222ef | 52 | |
3dcc731a GL |
53 | static int soc_camera_power_on(struct soc_camera_device *icd, |
54 | struct soc_camera_link *icl) | |
96e442c1 | 55 | { |
7b9d8c3c GL |
56 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
57 | int ret = regulator_bulk_enable(icl->num_regulators, | |
58 | icl->regulators); | |
3dcc731a GL |
59 | if (ret < 0) { |
60 | dev_err(icd->pdev, "Cannot enable regulators\n"); | |
61 | return ret; | |
62 | } | |
96e442c1 | 63 | |
3dcc731a GL |
64 | if (icl->power) { |
65 | ret = icl->power(icd->pdev, 1); | |
96e442c1 | 66 | if (ret < 0) { |
7dfff953 | 67 | dev_err(icd->pdev, |
96e442c1 | 68 | "Platform failed to power-on the camera.\n"); |
7b9d8c3c | 69 | goto elinkpwr; |
96e442c1 | 70 | } |
3dcc731a GL |
71 | } |
72 | ||
7b9d8c3c GL |
73 | ret = v4l2_subdev_call(sd, core, s_power, 1); |
74 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) | |
75 | goto esdpwr; | |
76 | ||
77 | return 0; | |
78 | ||
79 | esdpwr: | |
80 | if (icl->power) | |
81 | icl->power(icd->pdev, 0); | |
82 | elinkpwr: | |
83 | regulator_bulk_disable(icl->num_regulators, | |
84 | icl->regulators); | |
3dcc731a GL |
85 | return ret; |
86 | } | |
87 | ||
88 | static int soc_camera_power_off(struct soc_camera_device *icd, | |
89 | struct soc_camera_link *icl) | |
90 | { | |
7b9d8c3c GL |
91 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
92 | int ret = v4l2_subdev_call(sd, core, s_power, 0); | |
93 | ||
94 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) | |
95 | return ret; | |
3dcc731a GL |
96 | |
97 | if (icl->power) { | |
98 | ret = icl->power(icd->pdev, 0); | |
96e442c1 | 99 | if (ret < 0) { |
7dfff953 | 100 | dev_err(icd->pdev, |
96e442c1 AP |
101 | "Platform failed to power-off the camera.\n"); |
102 | return ret; | |
103 | } | |
96e442c1 AP |
104 | } |
105 | ||
3dcc731a GL |
106 | ret = regulator_bulk_disable(icl->num_regulators, |
107 | icl->regulators); | |
108 | if (ret < 0) | |
109 | dev_err(icd->pdev, "Cannot disable regulators\n"); | |
110 | ||
111 | return ret; | |
96e442c1 AP |
112 | } |
113 | ||
c2786ad2 GL |
114 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
115 | struct soc_camera_device *icd, unsigned int fourcc) | |
116 | { | |
117 | unsigned int i; | |
118 | ||
119 | for (i = 0; i < icd->num_user_formats; i++) | |
120 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
121 | return icd->user_formats + i; | |
122 | return NULL; | |
123 | } | |
124 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
125 | ||
32c69fcc GL |
126 | /** |
127 | * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
128 | * @icl: camera platform parameters | |
129 | * @cfg: media bus configuration | |
130 | * @return: resulting flags | |
131 | */ | |
132 | unsigned long soc_camera_apply_board_flags(struct soc_camera_link *icl, | |
133 | const struct v4l2_mbus_config *cfg) | |
134 | { | |
135 | unsigned long f, flags = cfg->flags; | |
136 | ||
137 | /* If only one of the two polarities is supported, switch to the opposite */ | |
138 | if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) { | |
139 | f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW); | |
140 | if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW) | |
141 | flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW; | |
142 | } | |
143 | ||
144 | if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) { | |
145 | f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW); | |
146 | if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW) | |
147 | flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW; | |
148 | } | |
149 | ||
150 | if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) { | |
151 | f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING); | |
152 | if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING) | |
153 | flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING; | |
154 | } | |
155 | ||
156 | return flags; | |
157 | } | |
158 | EXPORT_SYMBOL(soc_camera_apply_board_flags); | |
159 | ||
dca6b6d1 SA |
160 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
161 | ((x) >> 24) & 0xff | |
162 | ||
163 | static int soc_camera_try_fmt(struct soc_camera_device *icd, | |
164 | struct v4l2_format *f) | |
165 | { | |
7dfff953 | 166 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
dca6b6d1 SA |
167 | struct v4l2_pix_format *pix = &f->fmt.pix; |
168 | int ret; | |
169 | ||
7dfff953 | 170 | dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n", |
dca6b6d1 SA |
171 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
172 | ||
173 | pix->bytesperline = 0; | |
174 | pix->sizeimage = 0; | |
175 | ||
176 | ret = ici->ops->try_fmt(icd, f); | |
177 | if (ret < 0) | |
178 | return ret; | |
179 | ||
180 | if (!pix->sizeimage) { | |
181 | if (!pix->bytesperline) { | |
182 | const struct soc_camera_format_xlate *xlate; | |
183 | ||
184 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | |
185 | if (!xlate) | |
186 | return -EINVAL; | |
187 | ||
188 | ret = soc_mbus_bytes_per_line(pix->width, | |
189 | xlate->host_fmt); | |
190 | if (ret > 0) | |
191 | pix->bytesperline = ret; | |
192 | } | |
193 | if (pix->bytesperline) | |
194 | pix->sizeimage = pix->bytesperline * pix->height; | |
195 | } | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
72937890 | 200 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 201 | struct v4l2_format *f) |
e55222ef | 202 | { |
57bee29d | 203 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
204 | |
205 | WARN_ON(priv != file->private_data); | |
206 | ||
d366d4a0 GL |
207 | /* Only single-plane capture is supported so far */ |
208 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
209 | return -EINVAL; | |
210 | ||
ad5f2e85 | 211 | /* limit format to hardware capabilities */ |
dca6b6d1 | 212 | return soc_camera_try_fmt(icd, f); |
e55222ef GL |
213 | } |
214 | ||
215 | static int soc_camera_enum_input(struct file *file, void *priv, | |
216 | struct v4l2_input *inp) | |
217 | { | |
218 | if (inp->index != 0) | |
219 | return -EINVAL; | |
220 | ||
8318a64b GL |
221 | /* default is camera */ |
222 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
223 | inp->std = V4L2_STD_UNKNOWN; | |
224 | strcpy(inp->name, "Camera"); | |
e55222ef | 225 | |
8318a64b | 226 | return 0; |
e55222ef GL |
227 | } |
228 | ||
229 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
230 | { | |
231 | *i = 0; | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
237 | { | |
238 | if (i > 0) | |
239 | return -EINVAL; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | |
245 | { | |
57bee29d | 246 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 247 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 248 | |
c9c1f1c0 | 249 | return v4l2_subdev_call(sd, core, s_std, *a); |
e55222ef GL |
250 | } |
251 | ||
2f0babb7 GL |
252 | static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a) |
253 | { | |
254 | struct soc_camera_device *icd = file->private_data; | |
255 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
256 | ||
257 | return v4l2_subdev_call(sd, core, g_std, a); | |
258 | } | |
259 | ||
ed5b65dc QX |
260 | static int soc_camera_enum_fsizes(struct file *file, void *fh, |
261 | struct v4l2_frmsizeenum *fsize) | |
262 | { | |
263 | struct soc_camera_device *icd = file->private_data; | |
7dfff953 | 264 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
ed5b65dc QX |
265 | |
266 | return ici->ops->enum_fsizes(icd, fsize); | |
267 | } | |
268 | ||
e55222ef GL |
269 | static int soc_camera_reqbufs(struct file *file, void *priv, |
270 | struct v4l2_requestbuffers *p) | |
271 | { | |
272 | int ret; | |
57bee29d | 273 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 274 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
275 | |
276 | WARN_ON(priv != file->private_data); | |
277 | ||
57bee29d GL |
278 | if (icd->streamer && icd->streamer != file) |
279 | return -EBUSY; | |
280 | ||
592c2aba GL |
281 | if (ici->ops->init_videobuf) { |
282 | ret = videobuf_reqbufs(&icd->vb_vidq, p); | |
283 | if (ret < 0) | |
284 | return ret; | |
285 | ||
286 | ret = ici->ops->reqbufs(icd, p); | |
287 | } else { | |
288 | ret = vb2_reqbufs(&icd->vb2_vidq, p); | |
289 | } | |
e55222ef | 290 | |
57bee29d GL |
291 | if (!ret && !icd->streamer) |
292 | icd->streamer = file; | |
293 | ||
294 | return ret; | |
e55222ef GL |
295 | } |
296 | ||
297 | static int soc_camera_querybuf(struct file *file, void *priv, | |
298 | struct v4l2_buffer *p) | |
299 | { | |
57bee29d | 300 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 301 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
302 | |
303 | WARN_ON(priv != file->private_data); | |
304 | ||
592c2aba GL |
305 | if (ici->ops->init_videobuf) |
306 | return videobuf_querybuf(&icd->vb_vidq, p); | |
307 | else | |
308 | return vb2_querybuf(&icd->vb2_vidq, p); | |
e55222ef GL |
309 | } |
310 | ||
311 | static int soc_camera_qbuf(struct file *file, void *priv, | |
312 | struct v4l2_buffer *p) | |
313 | { | |
57bee29d | 314 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 315 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
316 | |
317 | WARN_ON(priv != file->private_data); | |
318 | ||
57bee29d GL |
319 | if (icd->streamer != file) |
320 | return -EBUSY; | |
321 | ||
592c2aba GL |
322 | if (ici->ops->init_videobuf) |
323 | return videobuf_qbuf(&icd->vb_vidq, p); | |
324 | else | |
325 | return vb2_qbuf(&icd->vb2_vidq, p); | |
e55222ef GL |
326 | } |
327 | ||
328 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
329 | struct v4l2_buffer *p) | |
330 | { | |
57bee29d | 331 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 332 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
333 | |
334 | WARN_ON(priv != file->private_data); | |
335 | ||
57bee29d GL |
336 | if (icd->streamer != file) |
337 | return -EBUSY; | |
338 | ||
592c2aba GL |
339 | if (ici->ops->init_videobuf) |
340 | return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
341 | else | |
342 | return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK); | |
e55222ef GL |
343 | } |
344 | ||
7ae77ee9 GL |
345 | static int soc_camera_create_bufs(struct file *file, void *priv, |
346 | struct v4l2_create_buffers *create) | |
347 | { | |
348 | struct soc_camera_device *icd = file->private_data; | |
349 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
350 | ||
351 | /* videobuf2 only */ | |
352 | if (ici->ops->init_videobuf) | |
353 | return -EINVAL; | |
354 | else | |
355 | return vb2_create_bufs(&icd->vb2_vidq, create); | |
356 | } | |
357 | ||
358 | static int soc_camera_prepare_buf(struct file *file, void *priv, | |
359 | struct v4l2_buffer *b) | |
360 | { | |
361 | struct soc_camera_device *icd = file->private_data; | |
362 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
363 | ||
364 | /* videobuf2 only */ | |
365 | if (ici->ops->init_videobuf) | |
366 | return -EINVAL; | |
367 | else | |
368 | return vb2_prepare_buf(&icd->vb2_vidq, b); | |
369 | } | |
370 | ||
40e2e092 | 371 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
372 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
373 | { | |
760697be | 374 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
7dfff953 | 375 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
3805f201 HV |
376 | unsigned int i, fmts = 0, raw_fmts = 0; |
377 | int ret; | |
760697be GL |
378 | enum v4l2_mbus_pixelcode code; |
379 | ||
380 | while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) | |
381 | raw_fmts++; | |
c2786ad2 GL |
382 | |
383 | if (!ici->ops->get_formats) | |
384 | /* | |
385 | * Fallback mode - the host will have to serve all | |
386 | * sensor-provided formats one-to-one to the user | |
387 | */ | |
760697be | 388 | fmts = raw_fmts; |
c2786ad2 GL |
389 | else |
390 | /* | |
391 | * First pass - only count formats this host-sensor | |
392 | * configuration can provide | |
393 | */ | |
760697be | 394 | for (i = 0; i < raw_fmts; i++) { |
fa48984e GL |
395 | ret = ici->ops->get_formats(icd, i, NULL); |
396 | if (ret < 0) | |
397 | return ret; | |
398 | fmts += ret; | |
399 | } | |
c2786ad2 GL |
400 | |
401 | if (!fmts) | |
402 | return -ENXIO; | |
403 | ||
404 | icd->user_formats = | |
405 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
406 | if (!icd->user_formats) | |
407 | return -ENOMEM; | |
408 | ||
7dfff953 | 409 | dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts); |
c2786ad2 GL |
410 | |
411 | /* Second pass - actually fill data formats */ | |
14df2cce | 412 | fmts = 0; |
760697be | 413 | for (i = 0; i < raw_fmts; i++) |
c2786ad2 | 414 | if (!ici->ops->get_formats) { |
760697be | 415 | v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); |
d2dcad49 | 416 | icd->user_formats[fmts].host_fmt = |
760697be | 417 | soc_mbus_get_fmtdesc(code); |
d2dcad49 GL |
418 | if (icd->user_formats[fmts].host_fmt) |
419 | icd->user_formats[fmts++].code = code; | |
c2786ad2 | 420 | } else { |
fa48984e GL |
421 | ret = ici->ops->get_formats(icd, i, |
422 | &icd->user_formats[fmts]); | |
423 | if (ret < 0) | |
424 | goto egfmt; | |
425 | fmts += ret; | |
c2786ad2 GL |
426 | } |
427 | ||
d2dcad49 | 428 | icd->num_user_formats = fmts; |
760697be | 429 | icd->current_fmt = &icd->user_formats[0]; |
c2786ad2 GL |
430 | |
431 | return 0; | |
fa48984e GL |
432 | |
433 | egfmt: | |
fa48984e GL |
434 | vfree(icd->user_formats); |
435 | return ret; | |
c2786ad2 GL |
436 | } |
437 | ||
40e2e092 | 438 | /* Always entered with .video_lock held */ |
c2786ad2 GL |
439 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
440 | { | |
7dfff953 | 441 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
fa48984e GL |
442 | |
443 | if (ici->ops->put_formats) | |
444 | ici->ops->put_formats(icd); | |
40e2e092 | 445 | icd->current_fmt = NULL; |
fa48984e | 446 | icd->num_user_formats = 0; |
c2786ad2 | 447 | vfree(icd->user_formats); |
40e2e092 | 448 | icd->user_formats = NULL; |
c2786ad2 GL |
449 | } |
450 | ||
760697be | 451 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
57bee29d | 452 | static int soc_camera_set_fmt(struct soc_camera_device *icd, |
df2ed070 GL |
453 | struct v4l2_format *f) |
454 | { | |
7dfff953 | 455 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
df2ed070 GL |
456 | struct v4l2_pix_format *pix = &f->fmt.pix; |
457 | int ret; | |
458 | ||
7dfff953 | 459 | dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n", |
6a6c8786 GL |
460 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
461 | ||
df2ed070 | 462 | /* We always call try_fmt() before set_fmt() or set_crop() */ |
dca6b6d1 | 463 | ret = soc_camera_try_fmt(icd, f); |
df2ed070 GL |
464 | if (ret < 0) |
465 | return ret; | |
466 | ||
467 | ret = ici->ops->set_fmt(icd, f); | |
468 | if (ret < 0) { | |
469 | return ret; | |
470 | } else if (!icd->current_fmt || | |
760697be | 471 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
7dfff953 | 472 | dev_err(icd->pdev, |
df2ed070 GL |
473 | "Host driver hasn't set up current format correctly!\n"); |
474 | return -EINVAL; | |
475 | } | |
476 | ||
6a6c8786 GL |
477 | icd->user_width = pix->width; |
478 | icd->user_height = pix->height; | |
0e4c180d SA |
479 | icd->bytesperline = pix->bytesperline; |
480 | icd->sizeimage = pix->sizeimage; | |
760697be | 481 | icd->colorspace = pix->colorspace; |
592c2aba GL |
482 | icd->field = pix->field; |
483 | if (ici->ops->init_videobuf) | |
484 | icd->vb_vidq.field = pix->field; | |
025c18a1 | 485 | |
7dfff953 | 486 | dev_dbg(icd->pdev, "set width: %d height: %d\n", |
6a6c8786 | 487 | icd->user_width, icd->user_height); |
df2ed070 GL |
488 | |
489 | /* set physical bus parameters */ | |
8843d119 | 490 | return ici->ops->set_bus_param(icd); |
df2ed070 GL |
491 | } |
492 | ||
bec43661 | 493 | static int soc_camera_open(struct file *file) |
e55222ef | 494 | { |
979ea1dd | 495 | struct video_device *vdev = video_devdata(file); |
7dfff953 | 496 | struct soc_camera_device *icd = dev_get_drvdata(vdev->parent); |
979ea1dd | 497 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
9dc4e48f | 498 | struct soc_camera_host *ici; |
e55222ef GL |
499 | int ret; |
500 | ||
b0050e41 | 501 | if (!to_soc_camera_control(icd)) |
40e2e092 GL |
502 | /* No device driver attached */ |
503 | return -ENODEV; | |
504 | ||
7dfff953 | 505 | ici = to_soc_camera_host(icd->parent); |
e55222ef | 506 | |
b8d9904c | 507 | if (!try_module_get(ici->ops->owner)) { |
7dfff953 | 508 | dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); |
57bee29d | 509 | return -EINVAL; |
e55222ef GL |
510 | } |
511 | ||
1a0063a9 GL |
512 | icd->use_count++; |
513 | ||
9dc4e48f GL |
514 | /* Now we really have to activate the camera */ |
515 | if (icd->use_count == 1) { | |
025c18a1 | 516 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
517 | struct v4l2_format f = { |
518 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
519 | .fmt.pix = { | |
6a6c8786 GL |
520 | .width = icd->user_width, |
521 | .height = icd->user_height, | |
025c18a1 | 522 | .field = icd->field, |
760697be GL |
523 | .colorspace = icd->colorspace, |
524 | .pixelformat = | |
525 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
526 | }, |
527 | }; | |
528 | ||
3dcc731a | 529 | ret = soc_camera_power_on(icd, icl); |
96e442c1 AP |
530 | if (ret < 0) |
531 | goto epower; | |
979ea1dd GL |
532 | |
533 | /* The camera could have been already on, try to reset */ | |
534 | if (icl->reset) | |
535 | icl->reset(icd->pdev); | |
536 | ||
b8d9904c | 537 | ret = ici->ops->add(icd); |
9dc4e48f | 538 | if (ret < 0) { |
7dfff953 | 539 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); |
9dc4e48f GL |
540 | goto eiciadd; |
541 | } | |
df2ed070 | 542 | |
4f9fb5ed MCC |
543 | pm_runtime_enable(&icd->vdev->dev); |
544 | ret = pm_runtime_resume(&icd->vdev->dev); | |
545 | if (ret < 0 && ret != -ENOSYS) | |
546 | goto eresume; | |
547 | ||
760697be GL |
548 | /* |
549 | * Try to configure with default parameters. Notice: this is the | |
550 | * very first open, so, we cannot race against other calls, | |
551 | * apart from someone else calling open() simultaneously, but | |
552 | * .video_lock is protecting us against it. | |
553 | */ | |
57bee29d | 554 | ret = soc_camera_set_fmt(icd, &f); |
df2ed070 GL |
555 | if (ret < 0) |
556 | goto esfmt; | |
24d8c029 | 557 | |
592c2aba GL |
558 | if (ici->ops->init_videobuf) { |
559 | ici->ops->init_videobuf(&icd->vb_vidq, icd); | |
560 | } else { | |
561 | ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); | |
562 | if (ret < 0) | |
563 | goto einitvb; | |
564 | } | |
ee02da64 | 565 | v4l2_ctrl_handler_setup(&icd->ctrl_handler); |
9dc4e48f GL |
566 | } |
567 | ||
57bee29d | 568 | file->private_data = icd; |
7dfff953 | 569 | dev_dbg(icd->pdev, "camera device open\n"); |
e55222ef | 570 | |
e55222ef GL |
571 | return 0; |
572 | ||
df2ed070 | 573 | /* |
4f9fb5ed | 574 | * First four errors are entered with the .video_lock held |
df2ed070 GL |
575 | * and use_count == 1 |
576 | */ | |
592c2aba | 577 | einitvb: |
df2ed070 | 578 | esfmt: |
4f9fb5ed MCC |
579 | pm_runtime_disable(&icd->vdev->dev); |
580 | eresume: | |
df2ed070 | 581 | ici->ops->remove(icd); |
9dc4e48f | 582 | eiciadd: |
3dcc731a | 583 | soc_camera_power_off(icd, icl); |
979ea1dd | 584 | epower: |
c2786ad2 | 585 | icd->use_count--; |
b8d9904c | 586 | module_put(ici->ops->owner); |
57bee29d | 587 | |
e55222ef GL |
588 | return ret; |
589 | } | |
590 | ||
bec43661 | 591 | static int soc_camera_close(struct file *file) |
e55222ef | 592 | { |
57bee29d | 593 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 594 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef | 595 | |
9dc4e48f | 596 | icd->use_count--; |
40e2e092 | 597 | if (!icd->use_count) { |
979ea1dd GL |
598 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
599 | ||
4f9fb5ed MCC |
600 | pm_runtime_suspend(&icd->vdev->dev); |
601 | pm_runtime_disable(&icd->vdev->dev); | |
602 | ||
592c2aba GL |
603 | if (ici->ops->init_videobuf2) |
604 | vb2_queue_release(&icd->vb2_vidq); | |
48ecf9fe | 605 | ici->ops->remove(icd); |
4f9fb5ed | 606 | |
3dcc731a | 607 | soc_camera_power_off(icd, icl); |
40e2e092 | 608 | } |
025c18a1 | 609 | |
57bee29d GL |
610 | if (icd->streamer == file) |
611 | icd->streamer = NULL; | |
612 | ||
b8d9904c | 613 | module_put(ici->ops->owner); |
9dc4e48f | 614 | |
7dfff953 | 615 | dev_dbg(icd->pdev, "camera device close\n"); |
e55222ef GL |
616 | |
617 | return 0; | |
618 | } | |
619 | ||
aba360d8 | 620 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 621 | size_t count, loff_t *ppos) |
e55222ef | 622 | { |
57bee29d | 623 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
624 | int err = -EINVAL; |
625 | ||
7dfff953 | 626 | dev_err(icd->pdev, "camera device read not implemented\n"); |
e55222ef GL |
627 | |
628 | return err; | |
629 | } | |
630 | ||
631 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
632 | { | |
57bee29d | 633 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 634 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
635 | int err; |
636 | ||
7dfff953 | 637 | dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); |
e55222ef | 638 | |
57bee29d GL |
639 | if (icd->streamer != file) |
640 | return -EBUSY; | |
641 | ||
592c2aba GL |
642 | if (ici->ops->init_videobuf) |
643 | err = videobuf_mmap_mapper(&icd->vb_vidq, vma); | |
644 | else | |
645 | err = vb2_mmap(&icd->vb2_vidq, vma); | |
e55222ef | 646 | |
7dfff953 | 647 | dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", |
e55222ef GL |
648 | (unsigned long)vma->vm_start, |
649 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
650 | err); | |
651 | ||
652 | return err; | |
653 | } | |
654 | ||
655 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
656 | { | |
57bee29d | 657 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 658 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef | 659 | |
57bee29d GL |
660 | if (icd->streamer != file) |
661 | return -EBUSY; | |
662 | ||
592c2aba | 663 | if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) { |
7dfff953 | 664 | dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); |
e55222ef GL |
665 | return POLLERR; |
666 | } | |
667 | ||
b8d9904c | 668 | return ici->ops->poll(file, pt); |
e55222ef GL |
669 | } |
670 | ||
592c2aba GL |
671 | void soc_camera_lock(struct vb2_queue *vq) |
672 | { | |
673 | struct soc_camera_device *icd = vb2_get_drv_priv(vq); | |
674 | mutex_lock(&icd->video_lock); | |
675 | } | |
676 | EXPORT_SYMBOL(soc_camera_lock); | |
677 | ||
678 | void soc_camera_unlock(struct vb2_queue *vq) | |
679 | { | |
680 | struct soc_camera_device *icd = vb2_get_drv_priv(vq); | |
681 | mutex_unlock(&icd->video_lock); | |
682 | } | |
683 | EXPORT_SYMBOL(soc_camera_unlock); | |
684 | ||
bec43661 | 685 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
686 | .owner = THIS_MODULE, |
687 | .open = soc_camera_open, | |
688 | .release = soc_camera_close, | |
b6a633c1 | 689 | .unlocked_ioctl = video_ioctl2, |
e55222ef GL |
690 | .read = soc_camera_read, |
691 | .mmap = soc_camera_mmap, | |
692 | .poll = soc_camera_poll, | |
e55222ef GL |
693 | }; |
694 | ||
72937890 | 695 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 696 | struct v4l2_format *f) |
e55222ef | 697 | { |
57bee29d | 698 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 699 | int ret; |
e55222ef GL |
700 | |
701 | WARN_ON(priv != file->private_data); | |
702 | ||
d366d4a0 | 703 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
7dfff953 | 704 | dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type); |
d366d4a0 GL |
705 | return -EINVAL; |
706 | } | |
707 | ||
57bee29d GL |
708 | if (icd->streamer && icd->streamer != file) |
709 | return -EBUSY; | |
1c3bb743 | 710 | |
7dfff953 GL |
711 | if (is_streaming(to_soc_camera_host(icd->parent), icd)) { |
712 | dev_err(icd->pdev, "S_FMT denied: queue initialised\n"); | |
b6a633c1 | 713 | return -EBUSY; |
1c3bb743 GL |
714 | } |
715 | ||
57bee29d GL |
716 | ret = soc_camera_set_fmt(icd, f); |
717 | ||
718 | if (!ret && !icd->streamer) | |
719 | icd->streamer = file; | |
1c3bb743 | 720 | |
1c3bb743 | 721 | return ret; |
e55222ef GL |
722 | } |
723 | ||
72937890 | 724 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 725 | struct v4l2_fmtdesc *f) |
e55222ef | 726 | { |
57bee29d | 727 | struct soc_camera_device *icd = file->private_data; |
760697be | 728 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
729 | |
730 | WARN_ON(priv != file->private_data); | |
731 | ||
c2786ad2 | 732 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
733 | return -EINVAL; |
734 | ||
c2786ad2 | 735 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 736 | |
760697be GL |
737 | if (format->name) |
738 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
739 | f->pixelformat = format->fourcc; |
740 | return 0; | |
741 | } | |
742 | ||
72937890 | 743 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 744 | struct v4l2_format *f) |
e55222ef | 745 | { |
57bee29d | 746 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 747 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
748 | |
749 | WARN_ON(priv != file->private_data); | |
750 | ||
d366d4a0 GL |
751 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
752 | return -EINVAL; | |
753 | ||
6a6c8786 GL |
754 | pix->width = icd->user_width; |
755 | pix->height = icd->user_height; | |
0e4c180d SA |
756 | pix->bytesperline = icd->bytesperline; |
757 | pix->sizeimage = icd->sizeimage; | |
592c2aba | 758 | pix->field = icd->field; |
760697be | 759 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
760697be | 760 | pix->colorspace = icd->colorspace; |
7dfff953 | 761 | dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 762 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
763 | return 0; |
764 | } | |
765 | ||
766 | static int soc_camera_querycap(struct file *file, void *priv, | |
767 | struct v4l2_capability *cap) | |
768 | { | |
57bee29d | 769 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 770 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
771 | |
772 | WARN_ON(priv != file->private_data); | |
773 | ||
774 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 775 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
776 | } |
777 | ||
778 | static int soc_camera_streamon(struct file *file, void *priv, | |
779 | enum v4l2_buf_type i) | |
780 | { | |
57bee29d | 781 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 782 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9c1f1c0 | 783 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 784 | int ret; |
e55222ef GL |
785 | |
786 | WARN_ON(priv != file->private_data); | |
787 | ||
e55222ef GL |
788 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
789 | return -EINVAL; | |
790 | ||
57bee29d GL |
791 | if (icd->streamer != file) |
792 | return -EBUSY; | |
793 | ||
e55222ef | 794 | /* This calls buf_queue from host driver's videobuf_queue_ops */ |
592c2aba GL |
795 | if (ici->ops->init_videobuf) |
796 | ret = videobuf_streamon(&icd->vb_vidq); | |
797 | else | |
798 | ret = vb2_streamon(&icd->vb2_vidq, i); | |
799 | ||
7fdbd85b AG |
800 | if (!ret) |
801 | v4l2_subdev_call(sd, video, s_stream, 1); | |
1c3bb743 | 802 | |
1c3bb743 | 803 | return ret; |
e55222ef GL |
804 | } |
805 | ||
806 | static int soc_camera_streamoff(struct file *file, void *priv, | |
807 | enum v4l2_buf_type i) | |
808 | { | |
57bee29d | 809 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 810 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
7dfff953 | 811 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
812 | |
813 | WARN_ON(priv != file->private_data); | |
814 | ||
e55222ef GL |
815 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
816 | return -EINVAL; | |
817 | ||
57bee29d GL |
818 | if (icd->streamer != file) |
819 | return -EBUSY; | |
820 | ||
5d28d525 GL |
821 | /* |
822 | * This calls buf_release from host driver's videobuf_queue_ops for all | |
823 | * remaining buffers. When the last buffer is freed, stop capture | |
824 | */ | |
592c2aba GL |
825 | if (ici->ops->init_videobuf) |
826 | videobuf_streamoff(&icd->vb_vidq); | |
827 | else | |
828 | vb2_streamoff(&icd->vb2_vidq, i); | |
e55222ef | 829 | |
c9c1f1c0 | 830 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef GL |
831 | |
832 | return 0; | |
833 | } | |
834 | ||
e55222ef GL |
835 | static int soc_camera_cropcap(struct file *file, void *fh, |
836 | struct v4l2_cropcap *a) | |
837 | { | |
57bee29d | 838 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 839 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef | 840 | |
6a6c8786 | 841 | return ici->ops->cropcap(icd, a); |
e55222ef GL |
842 | } |
843 | ||
844 | static int soc_camera_g_crop(struct file *file, void *fh, | |
845 | struct v4l2_crop *a) | |
846 | { | |
57bee29d | 847 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 848 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
6a6c8786 | 849 | int ret; |
e55222ef | 850 | |
6a6c8786 | 851 | ret = ici->ops->get_crop(icd, a); |
e55222ef | 852 | |
6a6c8786 | 853 | return ret; |
e55222ef GL |
854 | } |
855 | ||
68a54f0e GL |
856 | /* |
857 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
858 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
ab56d5eb | 859 | * retrieve it. |
68a54f0e | 860 | */ |
e55222ef GL |
861 | static int soc_camera_s_crop(struct file *file, void *fh, |
862 | struct v4l2_crop *a) | |
863 | { | |
57bee29d | 864 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 865 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
6a6c8786 GL |
866 | struct v4l2_rect *rect = &a->c; |
867 | struct v4l2_crop current_crop; | |
e55222ef GL |
868 | int ret; |
869 | ||
870 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
871 | return -EINVAL; | |
872 | ||
7dfff953 | 873 | dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n", |
6a6c8786 GL |
874 | rect->width, rect->height, rect->left, rect->top); |
875 | ||
6a6c8786 GL |
876 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
877 | ret = ici->ops->get_crop(icd, ¤t_crop); | |
878 | ||
b897a91a | 879 | /* Prohibit window size change with initialised buffers */ |
103754a0 | 880 | if (ret < 0) { |
7dfff953 | 881 | dev_err(icd->pdev, |
103754a0 | 882 | "S_CROP denied: getting current crop failed\n"); |
aee5c2f1 GL |
883 | } else if ((a->c.width == current_crop.c.width && |
884 | a->c.height == current_crop.c.height) || | |
885 | !is_streaming(ici, icd)) { | |
886 | /* same size or not streaming - use .set_crop() */ | |
887 | ret = ici->ops->set_crop(icd, a); | |
888 | } else if (ici->ops->set_livecrop) { | |
889 | ret = ici->ops->set_livecrop(icd, a); | |
890 | } else { | |
7dfff953 | 891 | dev_err(icd->pdev, |
b897a91a GL |
892 | "S_CROP denied: queue initialised and sizes differ\n"); |
893 | ret = -EBUSY; | |
b897a91a GL |
894 | } |
895 | ||
e55222ef GL |
896 | return ret; |
897 | } | |
898 | ||
c9f6ef69 GL |
899 | static int soc_camera_g_parm(struct file *file, void *fh, |
900 | struct v4l2_streamparm *a) | |
901 | { | |
57bee29d | 902 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 903 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9f6ef69 GL |
904 | |
905 | if (ici->ops->get_parm) | |
906 | return ici->ops->get_parm(icd, a); | |
907 | ||
908 | return -ENOIOCTLCMD; | |
909 | } | |
910 | ||
911 | static int soc_camera_s_parm(struct file *file, void *fh, | |
912 | struct v4l2_streamparm *a) | |
913 | { | |
57bee29d | 914 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 915 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9f6ef69 GL |
916 | |
917 | if (ici->ops->set_parm) | |
918 | return ici->ops->set_parm(icd, a); | |
919 | ||
920 | return -ENOIOCTLCMD; | |
921 | } | |
922 | ||
e55222ef | 923 | static int soc_camera_g_chip_ident(struct file *file, void *fh, |
aecde8b5 | 924 | struct v4l2_dbg_chip_ident *id) |
e55222ef | 925 | { |
57bee29d | 926 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 927 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 928 | |
c9c1f1c0 | 929 | return v4l2_subdev_call(sd, core, g_chip_ident, id); |
e55222ef GL |
930 | } |
931 | ||
932 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
933 | static int soc_camera_g_register(struct file *file, void *fh, | |
aecde8b5 | 934 | struct v4l2_dbg_register *reg) |
e55222ef | 935 | { |
57bee29d | 936 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 937 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 938 | |
c9c1f1c0 | 939 | return v4l2_subdev_call(sd, core, g_register, reg); |
e55222ef GL |
940 | } |
941 | ||
942 | static int soc_camera_s_register(struct file *file, void *fh, | |
aecde8b5 | 943 | struct v4l2_dbg_register *reg) |
e55222ef | 944 | { |
57bee29d | 945 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 946 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
e55222ef | 947 | |
c9c1f1c0 | 948 | return v4l2_subdev_call(sd, core, s_register, reg); |
e55222ef GL |
949 | } |
950 | #endif | |
951 | ||
7dfff953 GL |
952 | static int soc_camera_probe(struct soc_camera_device *icd); |
953 | ||
e55222ef GL |
954 | /* So far this function cannot fail */ |
955 | static void scan_add_host(struct soc_camera_host *ici) | |
956 | { | |
957 | struct soc_camera_device *icd; | |
958 | ||
959 | mutex_lock(&list_lock); | |
960 | ||
961 | list_for_each_entry(icd, &devices, list) { | |
962 | if (icd->iface == ici->nr) { | |
40e2e092 | 963 | int ret; |
7dfff953 GL |
964 | |
965 | icd->parent = ici->v4l2_dev.dev; | |
966 | ret = soc_camera_probe(icd); | |
e55222ef GL |
967 | } |
968 | } | |
969 | ||
970 | mutex_unlock(&list_lock); | |
971 | } | |
972 | ||
40e2e092 GL |
973 | #ifdef CONFIG_I2C_BOARDINFO |
974 | static int soc_camera_init_i2c(struct soc_camera_device *icd, | |
975 | struct soc_camera_link *icl) | |
e55222ef | 976 | { |
40e2e092 | 977 | struct i2c_client *client; |
7dfff953 | 978 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
40e2e092 | 979 | struct i2c_adapter *adap = i2c_get_adapter(icl->i2c_adapter_id); |
979ea1dd | 980 | struct v4l2_subdev *subdev; |
e55222ef | 981 | |
40e2e092 | 982 | if (!adap) { |
7dfff953 | 983 | dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n", |
40e2e092 GL |
984 | icl->i2c_adapter_id); |
985 | goto ei2cga; | |
986 | } | |
e55222ef | 987 | |
2f0babb7 | 988 | icl->board_info->platform_data = icl; |
e55222ef | 989 | |
979ea1dd | 990 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
9a1f8b34 | 991 | icl->board_info, NULL); |
d74f841c | 992 | if (!subdev) |
40e2e092 | 993 | goto ei2cnd; |
e55222ef | 994 | |
c4ce6d14 | 995 | client = v4l2_get_subdevdata(subdev); |
979ea1dd | 996 | |
40e2e092 | 997 | /* Use to_i2c_client(dev) to recover the i2c client */ |
7dfff953 | 998 | icd->control = &client->dev; |
e55222ef | 999 | |
40e2e092 GL |
1000 | return 0; |
1001 | ei2cnd: | |
1002 | i2c_put_adapter(adap); | |
1003 | ei2cga: | |
d74f841c | 1004 | return -ENODEV; |
e55222ef GL |
1005 | } |
1006 | ||
40e2e092 GL |
1007 | static void soc_camera_free_i2c(struct soc_camera_device *icd) |
1008 | { | |
1009 | struct i2c_client *client = | |
1010 | to_i2c_client(to_soc_camera_control(icd)); | |
c8dd7078 | 1011 | struct i2c_adapter *adap = client->adapter; |
7dfff953 GL |
1012 | |
1013 | icd->control = NULL; | |
979ea1dd | 1014 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 | 1015 | i2c_unregister_device(client); |
c8dd7078 | 1016 | i2c_put_adapter(adap); |
40e2e092 GL |
1017 | } |
1018 | #else | |
1019 | #define soc_camera_init_i2c(icd, icl) (-ENODEV) | |
1020 | #define soc_camera_free_i2c(icd) do {} while (0) | |
1021 | #endif | |
1022 | ||
979ea1dd | 1023 | static int soc_camera_video_start(struct soc_camera_device *icd); |
40e2e092 GL |
1024 | static int video_dev_create(struct soc_camera_device *icd); |
1025 | /* Called during host-driver probe */ | |
7dfff953 | 1026 | static int soc_camera_probe(struct soc_camera_device *icd) |
e55222ef | 1027 | { |
7dfff953 | 1028 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
40e2e092 | 1029 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
979ea1dd | 1030 | struct device *control = NULL; |
6a6c8786 | 1031 | struct v4l2_subdev *sd; |
760697be | 1032 | struct v4l2_mbus_framefmt mf; |
e55222ef GL |
1033 | int ret; |
1034 | ||
7dfff953 | 1035 | dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev)); |
1c3bb743 | 1036 | |
ee02da64 HV |
1037 | /* |
1038 | * Currently the subdev with the largest number of controls (13) is | |
1039 | * ov6550. So let's pick 16 as a hint for the control handler. Note | |
1040 | * that this is a hint only: too large and you waste some memory, too | |
1041 | * small and there is a (very) small performance hit when looking up | |
1042 | * controls in the internal hash. | |
1043 | */ | |
1044 | ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16); | |
1045 | if (ret < 0) | |
1046 | return ret; | |
1047 | ||
96e442c1 AP |
1048 | ret = regulator_bulk_get(icd->pdev, icl->num_regulators, |
1049 | icl->regulators); | |
1050 | if (ret < 0) | |
1051 | goto ereg; | |
1052 | ||
7b9d8c3c GL |
1053 | /* |
1054 | * This will not yet call v4l2_subdev_core_ops::s_power(1), because the | |
1055 | * subdevice has not been initialised yet. We'll have to call it once | |
1056 | * again after initialisation, even though it shouldn't be needed, we | |
1057 | * don't do any IO here. | |
1058 | */ | |
3dcc731a | 1059 | ret = soc_camera_power_on(icd, icl); |
96e442c1 AP |
1060 | if (ret < 0) |
1061 | goto epower; | |
979ea1dd GL |
1062 | |
1063 | /* The camera could have been already on, try to reset */ | |
1064 | if (icl->reset) | |
1065 | icl->reset(icd->pdev); | |
1066 | ||
1067 | ret = ici->ops->add(icd); | |
1068 | if (ret < 0) | |
1069 | goto eadd; | |
1070 | ||
1071 | /* Must have icd->vdev before registering the device */ | |
40e2e092 GL |
1072 | ret = video_dev_create(icd); |
1073 | if (ret < 0) | |
1074 | goto evdc; | |
1c3bb743 | 1075 | |
40e2e092 GL |
1076 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
1077 | if (icl->board_info) { | |
1078 | ret = soc_camera_init_i2c(icd, icl); | |
1079 | if (ret < 0) | |
1080 | goto eadddev; | |
1081 | } else if (!icl->add_device || !icl->del_device) { | |
1c3bb743 | 1082 | ret = -EINVAL; |
40e2e092 GL |
1083 | goto eadddev; |
1084 | } else { | |
979ea1dd GL |
1085 | if (icl->module_name) |
1086 | ret = request_module(icl->module_name); | |
1087 | ||
7dfff953 | 1088 | ret = icl->add_device(icd); |
40e2e092 GL |
1089 | if (ret < 0) |
1090 | goto eadddev; | |
1c3bb743 | 1091 | |
96c75399 GL |
1092 | /* |
1093 | * FIXME: this is racy, have to use driver-binding notification, | |
1094 | * when it is available | |
1095 | */ | |
979ea1dd | 1096 | control = to_soc_camera_control(icd); |
08590b96 | 1097 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd | 1098 | !try_module_get(control->driver->owner)) { |
7dfff953 | 1099 | icl->del_device(icd); |
7ae77ee9 | 1100 | ret = -ENODEV; |
979ea1dd GL |
1101 | goto enodrv; |
1102 | } | |
40e2e092 | 1103 | } |
e55222ef | 1104 | |
24105ebc | 1105 | sd = soc_camera_to_subdev(icd); |
4c0b036d GL |
1106 | sd->grp_id = soc_camera_grp_id(icd); |
1107 | v4l2_set_subdev_hostdata(sd, icd); | |
24105ebc | 1108 | |
ee02da64 HV |
1109 | if (v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler)) |
1110 | goto ectrl; | |
1111 | ||
fa48984e GL |
1112 | /* At this point client .probe() should have run already */ |
1113 | ret = soc_camera_init_user_formats(icd); | |
1114 | if (ret < 0) | |
1115 | goto eiufmt; | |
1116 | ||
fa48984e GL |
1117 | icd->field = V4L2_FIELD_ANY; |
1118 | ||
b6a633c1 GL |
1119 | /* |
1120 | * ..._video_start() will create a device node, video_register_device() | |
1121 | * itself is protected against concurrent open() calls, but we also have | |
1122 | * to protect our data. | |
1123 | */ | |
979ea1dd GL |
1124 | mutex_lock(&icd->video_lock); |
1125 | ||
1126 | ret = soc_camera_video_start(icd); | |
1127 | if (ret < 0) | |
1128 | goto evidstart; | |
1129 | ||
7b9d8c3c GL |
1130 | ret = v4l2_subdev_call(sd, core, s_power, 1); |
1131 | if (ret < 0 && ret != -ENOIOCTLCMD) | |
1132 | goto esdpwr; | |
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 | ||
979ea1dd GL |
1142 | ici->ops->remove(icd); |
1143 | ||
3dcc731a | 1144 | soc_camera_power_off(icd, icl); |
979ea1dd GL |
1145 | |
1146 | mutex_unlock(&icd->video_lock); | |
025c18a1 | 1147 | |
40e2e092 | 1148 | return 0; |
e55222ef | 1149 | |
7b9d8c3c GL |
1150 | esdpwr: |
1151 | video_unregister_device(icd->vdev); | |
979ea1dd GL |
1152 | evidstart: |
1153 | mutex_unlock(&icd->video_lock); | |
fa48984e GL |
1154 | soc_camera_free_user_formats(icd); |
1155 | eiufmt: | |
ee02da64 | 1156 | ectrl: |
979ea1dd | 1157 | if (icl->board_info) { |
40e2e092 | 1158 | soc_camera_free_i2c(icd); |
979ea1dd | 1159 | } else { |
7dfff953 | 1160 | icl->del_device(icd); |
979ea1dd GL |
1161 | module_put(control->driver->owner); |
1162 | } | |
1163 | enodrv: | |
40e2e092 GL |
1164 | eadddev: |
1165 | video_device_release(icd->vdev); | |
7b9d8c3c | 1166 | icd->vdev = NULL; |
40e2e092 | 1167 | evdc: |
979ea1dd GL |
1168 | ici->ops->remove(icd); |
1169 | eadd: | |
3dcc731a | 1170 | soc_camera_power_off(icd, icl); |
979ea1dd | 1171 | epower: |
96e442c1 AP |
1172 | regulator_bulk_free(icl->num_regulators, icl->regulators); |
1173 | ereg: | |
ee02da64 | 1174 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
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 | */ | |
7dfff953 | 1182 | static int soc_camera_remove(struct soc_camera_device *icd) |
e55222ef | 1183 | { |
40e2e092 GL |
1184 | struct soc_camera_link *icl = to_soc_camera_link(icd); |
1185 | struct video_device *vdev = icd->vdev; | |
e55222ef | 1186 | |
7dfff953 | 1187 | BUG_ON(!icd->parent); |
e55222ef | 1188 | |
ee02da64 | 1189 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
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 | 1197 | } else { |
7dfff953 | 1198 | struct device_driver *drv = to_soc_camera_control(icd)->driver; |
979ea1dd | 1199 | if (drv) { |
7dfff953 | 1200 | icl->del_device(icd); |
979ea1dd GL |
1201 | module_put(drv->owner); |
1202 | } | |
1203 | } | |
fa48984e | 1204 | soc_camera_free_user_formats(icd); |
025c18a1 | 1205 | |
96e442c1 AP |
1206 | regulator_bulk_free(icl->num_regulators, icl->regulators); |
1207 | ||
e55222ef GL |
1208 | return 0; |
1209 | } | |
1210 | ||
6a6c8786 GL |
1211 | static int default_cropcap(struct soc_camera_device *icd, |
1212 | struct v4l2_cropcap *a) | |
1213 | { | |
1214 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1215 | return v4l2_subdev_call(sd, video, cropcap, a); | |
1216 | } | |
1217 | ||
1218 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1219 | { | |
1220 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1221 | return v4l2_subdev_call(sd, video, g_crop, a); | |
1222 | } | |
1223 | ||
1224 | static int default_s_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1225 | { | |
1226 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1227 | return v4l2_subdev_call(sd, video, s_crop, a); | |
1228 | } | |
1229 | ||
06e17821 JK |
1230 | static int default_g_parm(struct soc_camera_device *icd, |
1231 | struct v4l2_streamparm *parm) | |
1232 | { | |
1233 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1234 | return v4l2_subdev_call(sd, video, g_parm, parm); | |
1235 | } | |
1236 | ||
1237 | static int default_s_parm(struct soc_camera_device *icd, | |
1238 | struct v4l2_streamparm *parm) | |
1239 | { | |
1240 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1241 | return v4l2_subdev_call(sd, video, s_parm, parm); | |
1242 | } | |
1243 | ||
ed5b65dc QX |
1244 | static int default_enum_fsizes(struct soc_camera_device *icd, |
1245 | struct v4l2_frmsizeenum *fsize) | |
1246 | { | |
1247 | int ret; | |
1248 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1249 | const struct soc_camera_format_xlate *xlate; | |
1250 | __u32 pixfmt = fsize->pixel_format; | |
1251 | struct v4l2_frmsizeenum fsize_mbus = *fsize; | |
1252 | ||
1253 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); | |
1254 | if (!xlate) | |
1255 | return -EINVAL; | |
1256 | /* map xlate-code to pixel_format, sensor only handle xlate-code*/ | |
1257 | fsize_mbus.pixel_format = xlate->code; | |
1258 | ||
1259 | ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &fsize_mbus); | |
1260 | if (ret < 0) | |
1261 | return ret; | |
1262 | ||
1263 | *fsize = fsize_mbus; | |
1264 | fsize->pixel_format = pixfmt; | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
b8d9904c | 1269 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1270 | { |
e55222ef | 1271 | struct soc_camera_host *ix; |
979ea1dd | 1272 | int ret; |
e55222ef | 1273 | |
64f5905e GL |
1274 | if (!ici || !ici->ops || |
1275 | !ici->ops->try_fmt || | |
1276 | !ici->ops->set_fmt || | |
1277 | !ici->ops->set_bus_param || | |
1278 | !ici->ops->querycap || | |
592c2aba GL |
1279 | ((!ici->ops->init_videobuf || |
1280 | !ici->ops->reqbufs) && | |
1281 | !ici->ops->init_videobuf2) || | |
64f5905e GL |
1282 | !ici->ops->add || |
1283 | !ici->ops->remove || | |
eff505fa | 1284 | !ici->ops->poll || |
979ea1dd | 1285 | !ici->v4l2_dev.dev) |
e55222ef GL |
1286 | return -EINVAL; |
1287 | ||
6a6c8786 GL |
1288 | if (!ici->ops->set_crop) |
1289 | ici->ops->set_crop = default_s_crop; | |
1290 | if (!ici->ops->get_crop) | |
1291 | ici->ops->get_crop = default_g_crop; | |
1292 | if (!ici->ops->cropcap) | |
1293 | ici->ops->cropcap = default_cropcap; | |
06e17821 JK |
1294 | if (!ici->ops->set_parm) |
1295 | ici->ops->set_parm = default_s_parm; | |
1296 | if (!ici->ops->get_parm) | |
1297 | ici->ops->get_parm = default_g_parm; | |
ed5b65dc QX |
1298 | if (!ici->ops->enum_fsizes) |
1299 | ici->ops->enum_fsizes = default_enum_fsizes; | |
6a6c8786 | 1300 | |
e55222ef GL |
1301 | mutex_lock(&list_lock); |
1302 | list_for_each_entry(ix, &hosts, list) { | |
1303 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1304 | ret = -EBUSY; |
1305 | goto edevreg; | |
e55222ef GL |
1306 | } |
1307 | } | |
1308 | ||
979ea1dd GL |
1309 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1310 | if (ret < 0) | |
1311 | goto edevreg; | |
eff505fa | 1312 | |
e55222ef GL |
1313 | list_add_tail(&ici->list, &hosts); |
1314 | mutex_unlock(&list_lock); | |
1315 | ||
e55222ef GL |
1316 | scan_add_host(ici); |
1317 | ||
1318 | return 0; | |
979ea1dd GL |
1319 | |
1320 | edevreg: | |
1321 | mutex_unlock(&list_lock); | |
1322 | return ret; | |
e55222ef GL |
1323 | } |
1324 | EXPORT_SYMBOL(soc_camera_host_register); | |
1325 | ||
1326 | /* Unregister all clients! */ | |
1327 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1328 | { | |
1329 | struct soc_camera_device *icd; | |
1330 | ||
1331 | mutex_lock(&list_lock); | |
1332 | ||
1333 | list_del(&ici->list); | |
7dfff953 GL |
1334 | list_for_each_entry(icd, &devices, list) |
1335 | if (icd->iface == ici->nr && to_soc_camera_control(icd)) | |
1336 | soc_camera_remove(icd); | |
e55222ef GL |
1337 | |
1338 | mutex_unlock(&list_lock); | |
1339 | ||
979ea1dd | 1340 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1341 | } |
1342 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1343 | ||
1344 | /* Image capture device */ | |
40e2e092 | 1345 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1346 | { |
1347 | struct soc_camera_device *ix; | |
1348 | int num = -1, i; | |
1349 | ||
e55222ef GL |
1350 | for (i = 0; i < 256 && num < 0; i++) { |
1351 | num = i; | |
40e2e092 | 1352 | /* Check if this index is available on this interface */ |
e55222ef GL |
1353 | list_for_each_entry(ix, &devices, list) { |
1354 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1355 | num = -1; | |
1356 | break; | |
1357 | } | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | if (num < 0) | |
5d28d525 GL |
1362 | /* |
1363 | * ok, we have 256 cameras on this host... | |
1364 | * man, stay reasonable... | |
1365 | */ | |
e55222ef GL |
1366 | return -ENOMEM; |
1367 | ||
64ff9ba5 | 1368 | icd->devnum = num; |
64f5905e GL |
1369 | icd->use_count = 0; |
1370 | icd->host_priv = NULL; | |
1c3bb743 | 1371 | mutex_init(&icd->video_lock); |
e55222ef | 1372 | |
40e2e092 GL |
1373 | list_add_tail(&icd->list, &devices); |
1374 | ||
1375 | return 0; | |
e55222ef | 1376 | } |
e55222ef | 1377 | |
a399810c HV |
1378 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1379 | .vidioc_querycap = soc_camera_querycap, | |
7ae77ee9 | 1380 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, |
a399810c | 1381 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, |
a399810c | 1382 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, |
7ae77ee9 | 1383 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, |
a399810c HV |
1384 | .vidioc_enum_input = soc_camera_enum_input, |
1385 | .vidioc_g_input = soc_camera_g_input, | |
1386 | .vidioc_s_input = soc_camera_s_input, | |
1387 | .vidioc_s_std = soc_camera_s_std, | |
2f0babb7 | 1388 | .vidioc_g_std = soc_camera_g_std, |
ed5b65dc | 1389 | .vidioc_enum_framesizes = soc_camera_enum_fsizes, |
a399810c | 1390 | .vidioc_reqbufs = soc_camera_reqbufs, |
a399810c HV |
1391 | .vidioc_querybuf = soc_camera_querybuf, |
1392 | .vidioc_qbuf = soc_camera_qbuf, | |
1393 | .vidioc_dqbuf = soc_camera_dqbuf, | |
7ae77ee9 GL |
1394 | .vidioc_create_bufs = soc_camera_create_bufs, |
1395 | .vidioc_prepare_buf = soc_camera_prepare_buf, | |
a399810c HV |
1396 | .vidioc_streamon = soc_camera_streamon, |
1397 | .vidioc_streamoff = soc_camera_streamoff, | |
a399810c HV |
1398 | .vidioc_cropcap = soc_camera_cropcap, |
1399 | .vidioc_g_crop = soc_camera_g_crop, | |
1400 | .vidioc_s_crop = soc_camera_s_crop, | |
c9f6ef69 GL |
1401 | .vidioc_g_parm = soc_camera_g_parm, |
1402 | .vidioc_s_parm = soc_camera_s_parm, | |
a399810c HV |
1403 | .vidioc_g_chip_ident = soc_camera_g_chip_ident, |
1404 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
1405 | .vidioc_g_register = soc_camera_g_register, | |
1406 | .vidioc_s_register = soc_camera_s_register, | |
1407 | #endif | |
1408 | }; | |
1409 | ||
40e2e092 | 1410 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef | 1411 | { |
7dfff953 | 1412 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
40e2e092 | 1413 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 1414 | |
e55222ef | 1415 | if (!vdev) |
40e2e092 | 1416 | return -ENOMEM; |
e55222ef GL |
1417 | |
1418 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 1419 | |
7dfff953 | 1420 | vdev->parent = icd->pdev; |
e55222ef GL |
1421 | vdev->current_norm = V4L2_STD_UNKNOWN; |
1422 | vdev->fops = &soc_camera_fops; | |
a399810c | 1423 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 1424 | vdev->release = video_device_release; |
40e2e092 | 1425 | vdev->tvnorms = V4L2_STD_UNKNOWN; |
ee02da64 | 1426 | vdev->ctrl_handler = &icd->ctrl_handler; |
7a05dfed | 1427 | vdev->lock = &icd->video_lock; |
e55222ef | 1428 | |
e55222ef GL |
1429 | icd->vdev = vdev; |
1430 | ||
1431 | return 0; | |
40e2e092 | 1432 | } |
e55222ef | 1433 | |
40e2e092 | 1434 | /* |
979ea1dd | 1435 | * Called from soc_camera_probe() above (with .video_lock held???) |
40e2e092 | 1436 | */ |
979ea1dd | 1437 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 1438 | { |
d364ee4f | 1439 | const struct device_type *type = icd->vdev->dev.type; |
979ea1dd | 1440 | int ret; |
40e2e092 | 1441 | |
7dfff953 | 1442 | if (!icd->parent) |
40e2e092 GL |
1443 | return -ENODEV; |
1444 | ||
46b21094 | 1445 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd | 1446 | if (ret < 0) { |
7dfff953 | 1447 | dev_err(icd->pdev, "video_register_device failed: %d\n", ret); |
979ea1dd GL |
1448 | return ret; |
1449 | } | |
40e2e092 | 1450 | |
4f9fb5ed MCC |
1451 | /* Restore device type, possibly set by the subdevice driver */ |
1452 | icd->vdev->dev.type = type; | |
1453 | ||
979ea1dd | 1454 | return 0; |
e55222ef | 1455 | } |
e55222ef | 1456 | |
40e2e092 | 1457 | static int __devinit soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 1458 | { |
40e2e092 GL |
1459 | struct soc_camera_link *icl = pdev->dev.platform_data; |
1460 | struct soc_camera_device *icd; | |
c41debaf | 1461 | int ret; |
0fd327bd | 1462 | |
40e2e092 GL |
1463 | if (!icl) |
1464 | return -EINVAL; | |
0fd327bd | 1465 | |
40e2e092 GL |
1466 | icd = kzalloc(sizeof(*icd), GFP_KERNEL); |
1467 | if (!icd) | |
1468 | return -ENOMEM; | |
0fd327bd | 1469 | |
40e2e092 | 1470 | icd->iface = icl->bus_id; |
7dfff953 | 1471 | icd->link = icl; |
979ea1dd | 1472 | icd->pdev = &pdev->dev; |
40e2e092 | 1473 | platform_set_drvdata(pdev, icd); |
0fd327bd | 1474 | |
40e2e092 GL |
1475 | ret = soc_camera_device_register(icd); |
1476 | if (ret < 0) | |
1477 | goto escdevreg; | |
0fd327bd | 1478 | |
6a6c8786 GL |
1479 | icd->user_width = DEFAULT_WIDTH; |
1480 | icd->user_height = DEFAULT_HEIGHT; | |
1481 | ||
40e2e092 | 1482 | return 0; |
0fd327bd | 1483 | |
40e2e092 GL |
1484 | escdevreg: |
1485 | kfree(icd); | |
0fd327bd | 1486 | |
40e2e092 | 1487 | return ret; |
c41debaf | 1488 | } |
0fd327bd | 1489 | |
5d28d525 GL |
1490 | /* |
1491 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 1492 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
1493 | * been unloaded already |
1494 | */ | |
40e2e092 | 1495 | static int __devexit soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 1496 | { |
40e2e092 | 1497 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
c41debaf | 1498 | |
40e2e092 | 1499 | if (!icd) |
c41debaf GL |
1500 | return -EINVAL; |
1501 | ||
7dfff953 | 1502 | list_del(&icd->list); |
c41debaf | 1503 | |
40e2e092 | 1504 | kfree(icd); |
c41debaf | 1505 | |
0fd327bd GL |
1506 | return 0; |
1507 | } | |
1508 | ||
1509 | static struct platform_driver __refdata soc_camera_pdrv = { | |
40e2e092 GL |
1510 | .remove = __devexit_p(soc_camera_pdrv_remove), |
1511 | .driver = { | |
1512 | .name = "soc-camera-pdrv", | |
1513 | .owner = THIS_MODULE, | |
0fd327bd GL |
1514 | }, |
1515 | }; | |
1516 | ||
e55222ef GL |
1517 | static int __init soc_camera_init(void) |
1518 | { | |
7dfff953 | 1519 | return platform_driver_probe(&soc_camera_pdrv, soc_camera_pdrv_probe); |
e55222ef GL |
1520 | } |
1521 | ||
1522 | static void __exit soc_camera_exit(void) | |
1523 | { | |
0fd327bd | 1524 | platform_driver_unregister(&soc_camera_pdrv); |
e55222ef GL |
1525 | } |
1526 | ||
1527 | module_init(soc_camera_init); | |
1528 | module_exit(soc_camera_exit); | |
1529 | ||
1530 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1531 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1532 | MODULE_LICENSE("GPL"); | |
0fd327bd | 1533 | MODULE_ALIAS("platform:soc-camera-pdrv"); |