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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> | |
40e2e092 | 24 | #include <linux/module.h> |
e09da11d | 25 | #include <linux/mutex.h> |
0fd327bd | 26 | #include <linux/platform_device.h> |
e09da11d | 27 | #include <linux/pm_runtime.h> |
96e442c1 | 28 | #include <linux/regulator/consumer.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
e55222ef GL |
30 | #include <linux/vmalloc.h> |
31 | ||
0fd327bd | 32 | #include <media/soc_camera.h> |
e09da11d GL |
33 | #include <media/soc_mediabus.h> |
34 | #include <media/v4l2-async.h> | |
9aea470b | 35 | #include <media/v4l2-clk.h> |
e55222ef | 36 | #include <media/v4l2-common.h> |
0fd327bd | 37 | #include <media/v4l2-ioctl.h> |
40e2e092 | 38 | #include <media/v4l2-dev.h> |
1ddc6a6c | 39 | #include <media/v4l2-of.h> |
092d3921 | 40 | #include <media/videobuf-core.h> |
592c2aba | 41 | #include <media/videobuf2-core.h> |
e55222ef | 42 | |
df2ed070 GL |
43 | /* Default to VGA resolution */ |
44 | #define DEFAULT_WIDTH 640 | |
45 | #define DEFAULT_HEIGHT 480 | |
46 | ||
aee5c2f1 GL |
47 | #define is_streaming(ici, icd) \ |
48 | (((ici)->ops->init_videobuf) ? \ | |
49 | (icd)->vb_vidq.streaming : \ | |
50 | vb2_is_streaming(&(icd)->vb2_vidq)) | |
51 | ||
e09da11d GL |
52 | #define MAP_MAX_NUM 32 |
53 | static DECLARE_BITMAP(device_map, MAP_MAX_NUM); | |
e55222ef GL |
54 | static LIST_HEAD(hosts); |
55 | static LIST_HEAD(devices); | |
e09da11d GL |
56 | /* |
57 | * Protects lists and bitmaps of hosts and devices. | |
58 | * Lock nesting: Ok to take ->host_lock under list_lock. | |
59 | */ | |
60 | static DEFINE_MUTEX(list_lock); | |
61 | ||
62 | struct soc_camera_async_client { | |
63 | struct v4l2_async_subdev *sensor; | |
64 | struct v4l2_async_notifier notifier; | |
65 | struct platform_device *pdev; | |
66 | struct list_head list; /* needed for clean up */ | |
67 | }; | |
68 | ||
69 | static int soc_camera_video_start(struct soc_camera_device *icd); | |
70 | static int video_dev_create(struct soc_camera_device *icd); | |
e55222ef | 71 | |
9aea470b GL |
72 | int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd, |
73 | struct v4l2_clk *clk) | |
96e442c1 | 74 | { |
40f07533 GL |
75 | int ret; |
76 | bool clock_toggle; | |
77 | ||
78 | if (clk && (!ssdd->unbalanced_power || | |
79 | !test_and_set_bit(0, &ssdd->clock_state))) { | |
80 | ret = v4l2_clk_enable(clk); | |
81 | if (ret < 0) { | |
82 | dev_err(dev, "Cannot enable clock: %d\n", ret); | |
83 | return ret; | |
84 | } | |
85 | clock_toggle = true; | |
86 | } else { | |
87 | clock_toggle = false; | |
9aea470b | 88 | } |
40f07533 | 89 | |
d3f884a7 GL |
90 | ret = regulator_bulk_enable(ssdd->sd_pdata.num_regulators, |
91 | ssdd->sd_pdata.regulators); | |
3dcc731a | 92 | if (ret < 0) { |
4ec10bac | 93 | dev_err(dev, "Cannot enable regulators\n"); |
e09da11d | 94 | goto eregenable; |
3dcc731a | 95 | } |
96e442c1 | 96 | |
25a34811 GL |
97 | if (ssdd->power) { |
98 | ret = ssdd->power(dev, 1); | |
96e442c1 | 99 | if (ret < 0) { |
4ec10bac | 100 | dev_err(dev, |
96e442c1 | 101 | "Platform failed to power-on the camera.\n"); |
9aea470b | 102 | goto epwron; |
96e442c1 | 103 | } |
3dcc731a GL |
104 | } |
105 | ||
9aea470b GL |
106 | return 0; |
107 | ||
108 | epwron: | |
d3f884a7 GL |
109 | regulator_bulk_disable(ssdd->sd_pdata.num_regulators, |
110 | ssdd->sd_pdata.regulators); | |
9aea470b | 111 | eregenable: |
40f07533 | 112 | if (clock_toggle) |
9aea470b GL |
113 | v4l2_clk_disable(clk); |
114 | ||
3dcc731a GL |
115 | return ret; |
116 | } | |
4ec10bac | 117 | EXPORT_SYMBOL(soc_camera_power_on); |
3dcc731a | 118 | |
9aea470b GL |
119 | int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd, |
120 | struct v4l2_clk *clk) | |
3dcc731a | 121 | { |
24592adc LP |
122 | int ret = 0; |
123 | int err; | |
7b9d8c3c | 124 | |
25a34811 GL |
125 | if (ssdd->power) { |
126 | err = ssdd->power(dev, 0); | |
24592adc | 127 | if (err < 0) { |
4ec10bac | 128 | dev_err(dev, |
96e442c1 | 129 | "Platform failed to power-off the camera.\n"); |
4ec10bac | 130 | ret = err; |
96e442c1 | 131 | } |
96e442c1 AP |
132 | } |
133 | ||
d3f884a7 GL |
134 | err = regulator_bulk_disable(ssdd->sd_pdata.num_regulators, |
135 | ssdd->sd_pdata.regulators); | |
24592adc | 136 | if (err < 0) { |
4ec10bac | 137 | dev_err(dev, "Cannot disable regulators\n"); |
24592adc LP |
138 | ret = ret ? : err; |
139 | } | |
3dcc731a | 140 | |
40f07533 | 141 | if (clk && (!ssdd->unbalanced_power || test_and_clear_bit(0, &ssdd->clock_state))) |
9aea470b GL |
142 | v4l2_clk_disable(clk); |
143 | ||
3dcc731a | 144 | return ret; |
96e442c1 | 145 | } |
4ec10bac LP |
146 | EXPORT_SYMBOL(soc_camera_power_off); |
147 | ||
e09da11d GL |
148 | int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd) |
149 | { | |
23272427 | 150 | /* Should not have any effect in synchronous case */ |
d3f884a7 GL |
151 | return devm_regulator_bulk_get(dev, ssdd->sd_pdata.num_regulators, |
152 | ssdd->sd_pdata.regulators); | |
e09da11d GL |
153 | } |
154 | EXPORT_SYMBOL(soc_camera_power_init); | |
155 | ||
4ec10bac LP |
156 | static int __soc_camera_power_on(struct soc_camera_device *icd) |
157 | { | |
158 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
159 | int ret; | |
160 | ||
161 | ret = v4l2_subdev_call(sd, core, s_power, 1); | |
162 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) | |
163 | return ret; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static int __soc_camera_power_off(struct soc_camera_device *icd) | |
169 | { | |
170 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
171 | int ret; | |
172 | ||
173 | ret = v4l2_subdev_call(sd, core, s_power, 0); | |
174 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) | |
175 | return ret; | |
176 | ||
177 | return 0; | |
178 | } | |
96e442c1 | 179 | |
c2786ad2 GL |
180 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
181 | struct soc_camera_device *icd, unsigned int fourcc) | |
182 | { | |
183 | unsigned int i; | |
184 | ||
185 | for (i = 0; i < icd->num_user_formats; i++) | |
186 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
187 | return icd->user_formats + i; | |
188 | return NULL; | |
189 | } | |
190 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
191 | ||
32c69fcc GL |
192 | /** |
193 | * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
25a34811 | 194 | * @ssdd: camera platform parameters |
32c69fcc GL |
195 | * @cfg: media bus configuration |
196 | * @return: resulting flags | |
197 | */ | |
25a34811 | 198 | unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd, |
32c69fcc GL |
199 | const struct v4l2_mbus_config *cfg) |
200 | { | |
201 | unsigned long f, flags = cfg->flags; | |
202 | ||
203 | /* If only one of the two polarities is supported, switch to the opposite */ | |
25a34811 | 204 | if (ssdd->flags & SOCAM_SENSOR_INVERT_HSYNC) { |
32c69fcc GL |
205 | f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW); |
206 | if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW) | |
207 | flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW; | |
208 | } | |
209 | ||
25a34811 | 210 | if (ssdd->flags & SOCAM_SENSOR_INVERT_VSYNC) { |
32c69fcc GL |
211 | f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW); |
212 | if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW) | |
213 | flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW; | |
214 | } | |
215 | ||
25a34811 | 216 | if (ssdd->flags & SOCAM_SENSOR_INVERT_PCLK) { |
32c69fcc GL |
217 | f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING); |
218 | if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING) | |
219 | flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING; | |
220 | } | |
221 | ||
222 | return flags; | |
223 | } | |
224 | EXPORT_SYMBOL(soc_camera_apply_board_flags); | |
225 | ||
dca6b6d1 SA |
226 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
227 | ((x) >> 24) & 0xff | |
228 | ||
229 | static int soc_camera_try_fmt(struct soc_camera_device *icd, | |
230 | struct v4l2_format *f) | |
231 | { | |
7dfff953 | 232 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
bed8d803 | 233 | const struct soc_camera_format_xlate *xlate; |
dca6b6d1 SA |
234 | struct v4l2_pix_format *pix = &f->fmt.pix; |
235 | int ret; | |
236 | ||
7dfff953 | 237 | dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n", |
dca6b6d1 SA |
238 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
239 | ||
a70a6c43 AW |
240 | if (pix->pixelformat != V4L2_PIX_FMT_JPEG && |
241 | !(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) { | |
914f05c8 LP |
242 | pix->bytesperline = 0; |
243 | pix->sizeimage = 0; | |
244 | } | |
dca6b6d1 SA |
245 | |
246 | ret = ici->ops->try_fmt(icd, f); | |
247 | if (ret < 0) | |
248 | return ret; | |
249 | ||
bed8d803 LP |
250 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
251 | if (!xlate) | |
252 | return -EINVAL; | |
dca6b6d1 | 253 | |
bed8d803 LP |
254 | ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt); |
255 | if (ret < 0) | |
256 | return ret; | |
dca6b6d1 | 257 | |
bed8d803 LP |
258 | pix->bytesperline = max_t(u32, pix->bytesperline, ret); |
259 | ||
260 | ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline, | |
261 | pix->height); | |
262 | if (ret < 0) | |
263 | return ret; | |
264 | ||
265 | pix->sizeimage = max_t(u32, pix->sizeimage, ret); | |
dca6b6d1 SA |
266 | |
267 | return 0; | |
268 | } | |
269 | ||
72937890 | 270 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 271 | struct v4l2_format *f) |
e55222ef | 272 | { |
57bee29d | 273 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
274 | |
275 | WARN_ON(priv != file->private_data); | |
276 | ||
d366d4a0 GL |
277 | /* Only single-plane capture is supported so far */ |
278 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
279 | return -EINVAL; | |
280 | ||
ad5f2e85 | 281 | /* limit format to hardware capabilities */ |
dca6b6d1 | 282 | return soc_camera_try_fmt(icd, f); |
e55222ef GL |
283 | } |
284 | ||
285 | static int soc_camera_enum_input(struct file *file, void *priv, | |
286 | struct v4l2_input *inp) | |
287 | { | |
288 | if (inp->index != 0) | |
289 | return -EINVAL; | |
290 | ||
8318a64b GL |
291 | /* default is camera */ |
292 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
8318a64b | 293 | strcpy(inp->name, "Camera"); |
e55222ef | 294 | |
8318a64b | 295 | return 0; |
e55222ef GL |
296 | } |
297 | ||
298 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
299 | { | |
300 | *i = 0; | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
305 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
306 | { | |
307 | if (i > 0) | |
308 | return -EINVAL; | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
314527ac | 313 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id a) |
e55222ef | 314 | { |
57bee29d | 315 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 316 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 317 | |
8774bed9 | 318 | return v4l2_subdev_call(sd, video, s_std, a); |
e55222ef GL |
319 | } |
320 | ||
2f0babb7 GL |
321 | static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a) |
322 | { | |
323 | struct soc_camera_device *icd = file->private_data; | |
324 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
325 | ||
8774bed9 | 326 | return v4l2_subdev_call(sd, video, g_std, a); |
2f0babb7 GL |
327 | } |
328 | ||
ad3537b5 | 329 | static int soc_camera_enum_framesizes(struct file *file, void *fh, |
ed5b65dc QX |
330 | struct v4l2_frmsizeenum *fsize) |
331 | { | |
332 | struct soc_camera_device *icd = file->private_data; | |
7dfff953 | 333 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
ed5b65dc | 334 | |
ad3537b5 | 335 | return ici->ops->enum_framesizes(icd, fsize); |
ed5b65dc QX |
336 | } |
337 | ||
e55222ef GL |
338 | static int soc_camera_reqbufs(struct file *file, void *priv, |
339 | struct v4l2_requestbuffers *p) | |
340 | { | |
341 | int ret; | |
57bee29d | 342 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 343 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
344 | |
345 | WARN_ON(priv != file->private_data); | |
346 | ||
57bee29d GL |
347 | if (icd->streamer && icd->streamer != file) |
348 | return -EBUSY; | |
349 | ||
592c2aba GL |
350 | if (ici->ops->init_videobuf) { |
351 | ret = videobuf_reqbufs(&icd->vb_vidq, p); | |
352 | if (ret < 0) | |
353 | return ret; | |
354 | ||
355 | ret = ici->ops->reqbufs(icd, p); | |
356 | } else { | |
357 | ret = vb2_reqbufs(&icd->vb2_vidq, p); | |
358 | } | |
e55222ef | 359 | |
57bee29d GL |
360 | if (!ret && !icd->streamer) |
361 | icd->streamer = file; | |
362 | ||
363 | return ret; | |
e55222ef GL |
364 | } |
365 | ||
366 | static int soc_camera_querybuf(struct file *file, void *priv, | |
367 | struct v4l2_buffer *p) | |
368 | { | |
57bee29d | 369 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 370 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
371 | |
372 | WARN_ON(priv != file->private_data); | |
373 | ||
592c2aba GL |
374 | if (ici->ops->init_videobuf) |
375 | return videobuf_querybuf(&icd->vb_vidq, p); | |
376 | else | |
377 | return vb2_querybuf(&icd->vb2_vidq, p); | |
e55222ef GL |
378 | } |
379 | ||
380 | static int soc_camera_qbuf(struct file *file, void *priv, | |
381 | struct v4l2_buffer *p) | |
382 | { | |
57bee29d | 383 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 384 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
385 | |
386 | WARN_ON(priv != file->private_data); | |
387 | ||
57bee29d GL |
388 | if (icd->streamer != file) |
389 | return -EBUSY; | |
390 | ||
592c2aba GL |
391 | if (ici->ops->init_videobuf) |
392 | return videobuf_qbuf(&icd->vb_vidq, p); | |
393 | else | |
394 | return vb2_qbuf(&icd->vb2_vidq, p); | |
e55222ef GL |
395 | } |
396 | ||
397 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
398 | struct v4l2_buffer *p) | |
399 | { | |
57bee29d | 400 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 401 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
402 | |
403 | WARN_ON(priv != file->private_data); | |
404 | ||
57bee29d GL |
405 | if (icd->streamer != file) |
406 | return -EBUSY; | |
407 | ||
592c2aba GL |
408 | if (ici->ops->init_videobuf) |
409 | return videobuf_dqbuf(&icd->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
410 | else | |
411 | return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK); | |
e55222ef GL |
412 | } |
413 | ||
7ae77ee9 GL |
414 | static int soc_camera_create_bufs(struct file *file, void *priv, |
415 | struct v4l2_create_buffers *create) | |
416 | { | |
417 | struct soc_camera_device *icd = file->private_data; | |
418 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
419 | ||
420 | /* videobuf2 only */ | |
421 | if (ici->ops->init_videobuf) | |
422 | return -EINVAL; | |
423 | else | |
424 | return vb2_create_bufs(&icd->vb2_vidq, create); | |
425 | } | |
426 | ||
427 | static int soc_camera_prepare_buf(struct file *file, void *priv, | |
428 | struct v4l2_buffer *b) | |
429 | { | |
430 | struct soc_camera_device *icd = file->private_data; | |
431 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
432 | ||
433 | /* videobuf2 only */ | |
434 | if (ici->ops->init_videobuf) | |
435 | return -EINVAL; | |
436 | else | |
437 | return vb2_prepare_buf(&icd->vb2_vidq, b); | |
438 | } | |
439 | ||
c710f591 KK |
440 | static int soc_camera_expbuf(struct file *file, void *priv, |
441 | struct v4l2_exportbuffer *p) | |
442 | { | |
443 | struct soc_camera_device *icd = file->private_data; | |
444 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
445 | ||
446 | if (icd->streamer != file) | |
447 | return -EBUSY; | |
448 | ||
449 | /* videobuf2 only */ | |
450 | if (ici->ops->init_videobuf) | |
451 | return -EINVAL; | |
452 | else | |
453 | return vb2_expbuf(&icd->vb2_vidq, p); | |
454 | } | |
455 | ||
dd669e90 | 456 | /* Always entered with .host_lock held */ |
c2786ad2 GL |
457 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
458 | { | |
760697be | 459 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
7dfff953 | 460 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
3805f201 HV |
461 | unsigned int i, fmts = 0, raw_fmts = 0; |
462 | int ret; | |
27ffaeb0 | 463 | u32 code; |
760697be GL |
464 | |
465 | while (!v4l2_subdev_call(sd, video, enum_mbus_fmt, raw_fmts, &code)) | |
466 | raw_fmts++; | |
c2786ad2 GL |
467 | |
468 | if (!ici->ops->get_formats) | |
469 | /* | |
470 | * Fallback mode - the host will have to serve all | |
471 | * sensor-provided formats one-to-one to the user | |
472 | */ | |
760697be | 473 | fmts = raw_fmts; |
c2786ad2 GL |
474 | else |
475 | /* | |
476 | * First pass - only count formats this host-sensor | |
477 | * configuration can provide | |
478 | */ | |
760697be | 479 | for (i = 0; i < raw_fmts; i++) { |
fa48984e GL |
480 | ret = ici->ops->get_formats(icd, i, NULL); |
481 | if (ret < 0) | |
482 | return ret; | |
483 | fmts += ret; | |
484 | } | |
c2786ad2 GL |
485 | |
486 | if (!fmts) | |
487 | return -ENXIO; | |
488 | ||
489 | icd->user_formats = | |
490 | vmalloc(fmts * sizeof(struct soc_camera_format_xlate)); | |
491 | if (!icd->user_formats) | |
492 | return -ENOMEM; | |
493 | ||
7dfff953 | 494 | dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts); |
c2786ad2 GL |
495 | |
496 | /* Second pass - actually fill data formats */ | |
14df2cce | 497 | fmts = 0; |
760697be | 498 | for (i = 0; i < raw_fmts; i++) |
c2786ad2 | 499 | if (!ici->ops->get_formats) { |
760697be | 500 | v4l2_subdev_call(sd, video, enum_mbus_fmt, i, &code); |
d2dcad49 | 501 | icd->user_formats[fmts].host_fmt = |
760697be | 502 | soc_mbus_get_fmtdesc(code); |
d2dcad49 GL |
503 | if (icd->user_formats[fmts].host_fmt) |
504 | icd->user_formats[fmts++].code = code; | |
c2786ad2 | 505 | } else { |
fa48984e GL |
506 | ret = ici->ops->get_formats(icd, i, |
507 | &icd->user_formats[fmts]); | |
508 | if (ret < 0) | |
509 | goto egfmt; | |
510 | fmts += ret; | |
c2786ad2 GL |
511 | } |
512 | ||
d2dcad49 | 513 | icd->num_user_formats = fmts; |
760697be | 514 | icd->current_fmt = &icd->user_formats[0]; |
c2786ad2 GL |
515 | |
516 | return 0; | |
fa48984e GL |
517 | |
518 | egfmt: | |
fa48984e GL |
519 | vfree(icd->user_formats); |
520 | return ret; | |
c2786ad2 GL |
521 | } |
522 | ||
dd669e90 | 523 | /* Always entered with .host_lock held */ |
c2786ad2 GL |
524 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
525 | { | |
7dfff953 | 526 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
fa48984e GL |
527 | |
528 | if (ici->ops->put_formats) | |
529 | ici->ops->put_formats(icd); | |
40e2e092 | 530 | icd->current_fmt = NULL; |
fa48984e | 531 | icd->num_user_formats = 0; |
c2786ad2 | 532 | vfree(icd->user_formats); |
40e2e092 | 533 | icd->user_formats = NULL; |
c2786ad2 GL |
534 | } |
535 | ||
760697be | 536 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
57bee29d | 537 | static int soc_camera_set_fmt(struct soc_camera_device *icd, |
df2ed070 GL |
538 | struct v4l2_format *f) |
539 | { | |
7dfff953 | 540 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
df2ed070 GL |
541 | struct v4l2_pix_format *pix = &f->fmt.pix; |
542 | int ret; | |
543 | ||
7dfff953 | 544 | dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n", |
6a6c8786 GL |
545 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
546 | ||
df2ed070 | 547 | /* We always call try_fmt() before set_fmt() or set_crop() */ |
dca6b6d1 | 548 | ret = soc_camera_try_fmt(icd, f); |
df2ed070 GL |
549 | if (ret < 0) |
550 | return ret; | |
551 | ||
552 | ret = ici->ops->set_fmt(icd, f); | |
553 | if (ret < 0) { | |
554 | return ret; | |
555 | } else if (!icd->current_fmt || | |
760697be | 556 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
7dfff953 | 557 | dev_err(icd->pdev, |
df2ed070 GL |
558 | "Host driver hasn't set up current format correctly!\n"); |
559 | return -EINVAL; | |
560 | } | |
561 | ||
6a6c8786 GL |
562 | icd->user_width = pix->width; |
563 | icd->user_height = pix->height; | |
0e4c180d SA |
564 | icd->bytesperline = pix->bytesperline; |
565 | icd->sizeimage = pix->sizeimage; | |
760697be | 566 | icd->colorspace = pix->colorspace; |
592c2aba GL |
567 | icd->field = pix->field; |
568 | if (ici->ops->init_videobuf) | |
569 | icd->vb_vidq.field = pix->field; | |
025c18a1 | 570 | |
7dfff953 | 571 | dev_dbg(icd->pdev, "set width: %d height: %d\n", |
6a6c8786 | 572 | icd->user_width, icd->user_height); |
df2ed070 GL |
573 | |
574 | /* set physical bus parameters */ | |
8843d119 | 575 | return ici->ops->set_bus_param(icd); |
df2ed070 GL |
576 | } |
577 | ||
f7f6ce2d GL |
578 | static int soc_camera_add_device(struct soc_camera_device *icd) |
579 | { | |
580 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
581 | int ret; | |
582 | ||
583 | if (ici->icd) | |
584 | return -EBUSY; | |
585 | ||
9aea470b | 586 | if (!icd->clk) { |
e09da11d | 587 | mutex_lock(&ici->clk_lock); |
9aea470b | 588 | ret = ici->ops->clock_start(ici); |
e09da11d | 589 | mutex_unlock(&ici->clk_lock); |
9aea470b GL |
590 | if (ret < 0) |
591 | return ret; | |
592 | } | |
a78fcc11 GL |
593 | |
594 | if (ici->ops->add) { | |
595 | ret = ici->ops->add(icd); | |
eb569cf9 | 596 | if (ret < 0) |
a78fcc11 | 597 | goto eadd; |
eb569cf9 GL |
598 | } |
599 | ||
eb569cf9 GL |
600 | ici->icd = icd; |
601 | ||
602 | return 0; | |
f7f6ce2d | 603 | |
eb569cf9 | 604 | eadd: |
e09da11d GL |
605 | if (!icd->clk) { |
606 | mutex_lock(&ici->clk_lock); | |
9aea470b | 607 | ici->ops->clock_stop(ici); |
e09da11d GL |
608 | mutex_unlock(&ici->clk_lock); |
609 | } | |
f7f6ce2d GL |
610 | return ret; |
611 | } | |
612 | ||
613 | static void soc_camera_remove_device(struct soc_camera_device *icd) | |
614 | { | |
615 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
616 | ||
617 | if (WARN_ON(icd != ici->icd)) | |
618 | return; | |
619 | ||
a78fcc11 GL |
620 | if (ici->ops->remove) |
621 | ici->ops->remove(icd); | |
e09da11d GL |
622 | if (!icd->clk) { |
623 | mutex_lock(&ici->clk_lock); | |
9aea470b | 624 | ici->ops->clock_stop(ici); |
e09da11d GL |
625 | mutex_unlock(&ici->clk_lock); |
626 | } | |
f7f6ce2d GL |
627 | ici->icd = NULL; |
628 | } | |
629 | ||
bec43661 | 630 | static int soc_camera_open(struct file *file) |
e55222ef | 631 | { |
979ea1dd | 632 | struct video_device *vdev = video_devdata(file); |
2400a1f8 | 633 | struct soc_camera_device *icd; |
9dc4e48f | 634 | struct soc_camera_host *ici; |
e55222ef GL |
635 | int ret; |
636 | ||
7d051b35 GL |
637 | /* |
638 | * Don't mess with the host during probe: wait until the loop in | |
2400a1f8 GL |
639 | * scan_add_host() completes. Also protect against a race with |
640 | * soc_camera_host_unregister(). | |
7d051b35 GL |
641 | */ |
642 | if (mutex_lock_interruptible(&list_lock)) | |
643 | return -ERESTARTSYS; | |
2400a1f8 GL |
644 | |
645 | if (!vdev || !video_is_registered(vdev)) { | |
646 | mutex_unlock(&list_lock); | |
647 | return -ENODEV; | |
648 | } | |
649 | ||
14381c26 | 650 | icd = video_get_drvdata(vdev); |
7dfff953 | 651 | ici = to_soc_camera_host(icd->parent); |
2400a1f8 GL |
652 | |
653 | ret = try_module_get(ici->ops->owner) ? 0 : -ENODEV; | |
7d051b35 | 654 | mutex_unlock(&list_lock); |
e55222ef | 655 | |
2400a1f8 | 656 | if (ret < 0) { |
7dfff953 | 657 | dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); |
2400a1f8 GL |
658 | return ret; |
659 | } | |
660 | ||
661 | if (!to_soc_camera_control(icd)) { | |
662 | /* No device driver attached */ | |
663 | ret = -ENODEV; | |
664 | goto econtrol; | |
e55222ef GL |
665 | } |
666 | ||
2400a1f8 GL |
667 | if (mutex_lock_interruptible(&ici->host_lock)) { |
668 | ret = -ERESTARTSYS; | |
669 | goto elockhost; | |
670 | } | |
1a0063a9 GL |
671 | icd->use_count++; |
672 | ||
9dc4e48f GL |
673 | /* Now we really have to activate the camera */ |
674 | if (icd->use_count == 1) { | |
2400a1f8 | 675 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
025c18a1 | 676 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
677 | struct v4l2_format f = { |
678 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
679 | .fmt.pix = { | |
6a6c8786 GL |
680 | .width = icd->user_width, |
681 | .height = icd->user_height, | |
025c18a1 | 682 | .field = icd->field, |
760697be GL |
683 | .colorspace = icd->colorspace, |
684 | .pixelformat = | |
685 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
686 | }, |
687 | }; | |
688 | ||
979ea1dd | 689 | /* The camera could have been already on, try to reset */ |
25a34811 GL |
690 | if (sdesc->subdev_desc.reset) |
691 | sdesc->subdev_desc.reset(icd->pdev); | |
979ea1dd | 692 | |
f7f6ce2d | 693 | ret = soc_camera_add_device(icd); |
9dc4e48f | 694 | if (ret < 0) { |
7dfff953 | 695 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); |
9dc4e48f GL |
696 | goto eiciadd; |
697 | } | |
df2ed070 | 698 | |
4ec10bac | 699 | ret = __soc_camera_power_on(icd); |
7705b6d8 GL |
700 | if (ret < 0) |
701 | goto epower; | |
702 | ||
4f9fb5ed MCC |
703 | pm_runtime_enable(&icd->vdev->dev); |
704 | ret = pm_runtime_resume(&icd->vdev->dev); | |
705 | if (ret < 0 && ret != -ENOSYS) | |
706 | goto eresume; | |
707 | ||
760697be GL |
708 | /* |
709 | * Try to configure with default parameters. Notice: this is the | |
710 | * very first open, so, we cannot race against other calls, | |
711 | * apart from someone else calling open() simultaneously, but | |
dd669e90 | 712 | * .host_lock is protecting us against it. |
760697be | 713 | */ |
57bee29d | 714 | ret = soc_camera_set_fmt(icd, &f); |
df2ed070 GL |
715 | if (ret < 0) |
716 | goto esfmt; | |
24d8c029 | 717 | |
592c2aba GL |
718 | if (ici->ops->init_videobuf) { |
719 | ici->ops->init_videobuf(&icd->vb_vidq, icd); | |
720 | } else { | |
721 | ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); | |
722 | if (ret < 0) | |
723 | goto einitvb; | |
724 | } | |
ee02da64 | 725 | v4l2_ctrl_handler_setup(&icd->ctrl_handler); |
9dc4e48f | 726 | } |
dd669e90 | 727 | mutex_unlock(&ici->host_lock); |
9dc4e48f | 728 | |
57bee29d | 729 | file->private_data = icd; |
7dfff953 | 730 | dev_dbg(icd->pdev, "camera device open\n"); |
e55222ef | 731 | |
e55222ef GL |
732 | return 0; |
733 | ||
df2ed070 | 734 | /* |
e09da11d GL |
735 | * All errors are entered with the .host_lock held, first four also |
736 | * with use_count == 1 | |
df2ed070 | 737 | */ |
592c2aba | 738 | einitvb: |
df2ed070 | 739 | esfmt: |
4f9fb5ed MCC |
740 | pm_runtime_disable(&icd->vdev->dev); |
741 | eresume: | |
4ec10bac | 742 | __soc_camera_power_off(icd); |
979ea1dd | 743 | epower: |
f7f6ce2d | 744 | soc_camera_remove_device(icd); |
7705b6d8 | 745 | eiciadd: |
c2786ad2 | 746 | icd->use_count--; |
dd669e90 | 747 | mutex_unlock(&ici->host_lock); |
2400a1f8 GL |
748 | elockhost: |
749 | econtrol: | |
750 | module_put(ici->ops->owner); | |
57bee29d | 751 | |
e55222ef GL |
752 | return ret; |
753 | } | |
754 | ||
bec43661 | 755 | static int soc_camera_close(struct file *file) |
e55222ef | 756 | { |
57bee29d | 757 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 758 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef | 759 | |
dd669e90 | 760 | mutex_lock(&ici->host_lock); |
9dc4e48f | 761 | icd->use_count--; |
40e2e092 | 762 | if (!icd->use_count) { |
4f9fb5ed MCC |
763 | pm_runtime_suspend(&icd->vdev->dev); |
764 | pm_runtime_disable(&icd->vdev->dev); | |
765 | ||
592c2aba GL |
766 | if (ici->ops->init_videobuf2) |
767 | vb2_queue_release(&icd->vb2_vidq); | |
4ec10bac | 768 | __soc_camera_power_off(icd); |
af44ad5e | 769 | |
f7f6ce2d | 770 | soc_camera_remove_device(icd); |
40e2e092 | 771 | } |
025c18a1 | 772 | |
57bee29d GL |
773 | if (icd->streamer == file) |
774 | icd->streamer = NULL; | |
dd669e90 | 775 | mutex_unlock(&ici->host_lock); |
57bee29d | 776 | |
b8d9904c | 777 | module_put(ici->ops->owner); |
9dc4e48f | 778 | |
7dfff953 | 779 | dev_dbg(icd->pdev, "camera device close\n"); |
e55222ef GL |
780 | |
781 | return 0; | |
782 | } | |
783 | ||
aba360d8 | 784 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 785 | size_t count, loff_t *ppos) |
e55222ef | 786 | { |
57bee29d | 787 | struct soc_camera_device *icd = file->private_data; |
1438be56 AG |
788 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
789 | ||
790 | dev_dbg(icd->pdev, "read called, buf %p\n", buf); | |
791 | ||
792 | if (ici->ops->init_videobuf2 && icd->vb2_vidq.io_modes & VB2_READ) | |
793 | return vb2_read(&icd->vb2_vidq, buf, count, ppos, | |
794 | file->f_flags & O_NONBLOCK); | |
e55222ef | 795 | |
7dfff953 | 796 | dev_err(icd->pdev, "camera device read not implemented\n"); |
e55222ef | 797 | |
1438be56 | 798 | return -EINVAL; |
e55222ef GL |
799 | } |
800 | ||
801 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
802 | { | |
57bee29d | 803 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 804 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
805 | int err; |
806 | ||
7dfff953 | 807 | dev_dbg(icd->pdev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); |
e55222ef | 808 | |
57bee29d GL |
809 | if (icd->streamer != file) |
810 | return -EBUSY; | |
811 | ||
dd669e90 | 812 | if (mutex_lock_interruptible(&ici->host_lock)) |
8422b087 | 813 | return -ERESTARTSYS; |
592c2aba GL |
814 | if (ici->ops->init_videobuf) |
815 | err = videobuf_mmap_mapper(&icd->vb_vidq, vma); | |
816 | else | |
817 | err = vb2_mmap(&icd->vb2_vidq, vma); | |
dd669e90 | 818 | mutex_unlock(&ici->host_lock); |
e55222ef | 819 | |
7dfff953 | 820 | dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", |
e55222ef GL |
821 | (unsigned long)vma->vm_start, |
822 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
823 | err); | |
824 | ||
825 | return err; | |
826 | } | |
827 | ||
828 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
829 | { | |
57bee29d | 830 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 831 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
8422b087 | 832 | unsigned res = POLLERR; |
e55222ef | 833 | |
57bee29d | 834 | if (icd->streamer != file) |
e55222ef | 835 | return POLLERR; |
e55222ef | 836 | |
dd669e90 | 837 | mutex_lock(&ici->host_lock); |
8422b087 HV |
838 | if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) |
839 | dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); | |
840 | else | |
841 | res = ici->ops->poll(file, pt); | |
dd669e90 | 842 | mutex_unlock(&ici->host_lock); |
8422b087 | 843 | return res; |
e55222ef GL |
844 | } |
845 | ||
bec43661 | 846 | static struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
847 | .owner = THIS_MODULE, |
848 | .open = soc_camera_open, | |
849 | .release = soc_camera_close, | |
b6a633c1 | 850 | .unlocked_ioctl = video_ioctl2, |
e55222ef GL |
851 | .read = soc_camera_read, |
852 | .mmap = soc_camera_mmap, | |
853 | .poll = soc_camera_poll, | |
e55222ef GL |
854 | }; |
855 | ||
72937890 | 856 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 857 | struct v4l2_format *f) |
e55222ef | 858 | { |
57bee29d | 859 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 860 | int ret; |
e55222ef GL |
861 | |
862 | WARN_ON(priv != file->private_data); | |
863 | ||
d366d4a0 | 864 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
7dfff953 | 865 | dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type); |
d366d4a0 GL |
866 | return -EINVAL; |
867 | } | |
868 | ||
57bee29d GL |
869 | if (icd->streamer && icd->streamer != file) |
870 | return -EBUSY; | |
1c3bb743 | 871 | |
7dfff953 GL |
872 | if (is_streaming(to_soc_camera_host(icd->parent), icd)) { |
873 | dev_err(icd->pdev, "S_FMT denied: queue initialised\n"); | |
b6a633c1 | 874 | return -EBUSY; |
1c3bb743 GL |
875 | } |
876 | ||
57bee29d GL |
877 | ret = soc_camera_set_fmt(icd, f); |
878 | ||
879 | if (!ret && !icd->streamer) | |
880 | icd->streamer = file; | |
1c3bb743 | 881 | |
1c3bb743 | 882 | return ret; |
e55222ef GL |
883 | } |
884 | ||
72937890 | 885 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 886 | struct v4l2_fmtdesc *f) |
e55222ef | 887 | { |
57bee29d | 888 | struct soc_camera_device *icd = file->private_data; |
760697be | 889 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
890 | |
891 | WARN_ON(priv != file->private_data); | |
892 | ||
c2786ad2 | 893 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
894 | return -EINVAL; |
895 | ||
c2786ad2 | 896 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 897 | |
760697be GL |
898 | if (format->name) |
899 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
900 | f->pixelformat = format->fourcc; |
901 | return 0; | |
902 | } | |
903 | ||
72937890 | 904 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 905 | struct v4l2_format *f) |
e55222ef | 906 | { |
57bee29d | 907 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 908 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
909 | |
910 | WARN_ON(priv != file->private_data); | |
911 | ||
d366d4a0 GL |
912 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
913 | return -EINVAL; | |
914 | ||
6a6c8786 GL |
915 | pix->width = icd->user_width; |
916 | pix->height = icd->user_height; | |
0e4c180d SA |
917 | pix->bytesperline = icd->bytesperline; |
918 | pix->sizeimage = icd->sizeimage; | |
592c2aba | 919 | pix->field = icd->field; |
760697be | 920 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
760697be | 921 | pix->colorspace = icd->colorspace; |
7dfff953 | 922 | dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 923 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
924 | return 0; |
925 | } | |
926 | ||
927 | static int soc_camera_querycap(struct file *file, void *priv, | |
928 | struct v4l2_capability *cap) | |
929 | { | |
57bee29d | 930 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 931 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
932 | |
933 | WARN_ON(priv != file->private_data); | |
934 | ||
935 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 936 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
937 | } |
938 | ||
939 | static int soc_camera_streamon(struct file *file, void *priv, | |
940 | enum v4l2_buf_type i) | |
941 | { | |
57bee29d | 942 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 943 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9c1f1c0 | 944 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 945 | int ret; |
e55222ef GL |
946 | |
947 | WARN_ON(priv != file->private_data); | |
948 | ||
e55222ef GL |
949 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
950 | return -EINVAL; | |
951 | ||
57bee29d GL |
952 | if (icd->streamer != file) |
953 | return -EBUSY; | |
954 | ||
e55222ef | 955 | /* This calls buf_queue from host driver's videobuf_queue_ops */ |
592c2aba GL |
956 | if (ici->ops->init_videobuf) |
957 | ret = videobuf_streamon(&icd->vb_vidq); | |
958 | else | |
959 | ret = vb2_streamon(&icd->vb2_vidq, i); | |
960 | ||
7fdbd85b AG |
961 | if (!ret) |
962 | v4l2_subdev_call(sd, video, s_stream, 1); | |
1c3bb743 | 963 | |
1c3bb743 | 964 | return ret; |
e55222ef GL |
965 | } |
966 | ||
967 | static int soc_camera_streamoff(struct file *file, void *priv, | |
968 | enum v4l2_buf_type i) | |
969 | { | |
57bee29d | 970 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 971 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
7dfff953 | 972 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
973 | |
974 | WARN_ON(priv != file->private_data); | |
975 | ||
e55222ef GL |
976 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
977 | return -EINVAL; | |
978 | ||
57bee29d GL |
979 | if (icd->streamer != file) |
980 | return -EBUSY; | |
981 | ||
5d28d525 GL |
982 | /* |
983 | * This calls buf_release from host driver's videobuf_queue_ops for all | |
984 | * remaining buffers. When the last buffer is freed, stop capture | |
985 | */ | |
592c2aba GL |
986 | if (ici->ops->init_videobuf) |
987 | videobuf_streamoff(&icd->vb_vidq); | |
988 | else | |
989 | vb2_streamoff(&icd->vb2_vidq, i); | |
e55222ef | 990 | |
c9c1f1c0 | 991 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef GL |
992 | |
993 | return 0; | |
994 | } | |
995 | ||
e55222ef GL |
996 | static int soc_camera_cropcap(struct file *file, void *fh, |
997 | struct v4l2_cropcap *a) | |
998 | { | |
57bee29d | 999 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 1000 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef | 1001 | |
6a6c8786 | 1002 | return ici->ops->cropcap(icd, a); |
e55222ef GL |
1003 | } |
1004 | ||
1005 | static int soc_camera_g_crop(struct file *file, void *fh, | |
1006 | struct v4l2_crop *a) | |
1007 | { | |
57bee29d | 1008 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 1009 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
6a6c8786 | 1010 | int ret; |
e55222ef | 1011 | |
6a6c8786 | 1012 | ret = ici->ops->get_crop(icd, a); |
e55222ef | 1013 | |
6a6c8786 | 1014 | return ret; |
e55222ef GL |
1015 | } |
1016 | ||
68a54f0e GL |
1017 | /* |
1018 | * According to the V4L2 API, drivers shall not update the struct v4l2_crop | |
1019 | * argument with the actual geometry, instead, the user shall use G_CROP to | |
ab56d5eb | 1020 | * retrieve it. |
68a54f0e | 1021 | */ |
e55222ef | 1022 | static int soc_camera_s_crop(struct file *file, void *fh, |
4f996594 | 1023 | const struct v4l2_crop *a) |
e55222ef | 1024 | { |
57bee29d | 1025 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 1026 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
4f996594 | 1027 | const struct v4l2_rect *rect = &a->c; |
6a6c8786 | 1028 | struct v4l2_crop current_crop; |
e55222ef GL |
1029 | int ret; |
1030 | ||
1031 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1032 | return -EINVAL; | |
1033 | ||
7dfff953 | 1034 | dev_dbg(icd->pdev, "S_CROP(%ux%u@%u:%u)\n", |
6a6c8786 GL |
1035 | rect->width, rect->height, rect->left, rect->top); |
1036 | ||
605a4103 AG |
1037 | current_crop.type = a->type; |
1038 | ||
6a6c8786 GL |
1039 | /* If get_crop fails, we'll let host and / or client drivers decide */ |
1040 | ret = ici->ops->get_crop(icd, ¤t_crop); | |
1041 | ||
b897a91a | 1042 | /* Prohibit window size change with initialised buffers */ |
103754a0 | 1043 | if (ret < 0) { |
7dfff953 | 1044 | dev_err(icd->pdev, |
103754a0 | 1045 | "S_CROP denied: getting current crop failed\n"); |
aee5c2f1 GL |
1046 | } else if ((a->c.width == current_crop.c.width && |
1047 | a->c.height == current_crop.c.height) || | |
1048 | !is_streaming(ici, icd)) { | |
1049 | /* same size or not streaming - use .set_crop() */ | |
1050 | ret = ici->ops->set_crop(icd, a); | |
1051 | } else if (ici->ops->set_livecrop) { | |
1052 | ret = ici->ops->set_livecrop(icd, a); | |
1053 | } else { | |
7dfff953 | 1054 | dev_err(icd->pdev, |
b897a91a GL |
1055 | "S_CROP denied: queue initialised and sizes differ\n"); |
1056 | ret = -EBUSY; | |
b897a91a GL |
1057 | } |
1058 | ||
e55222ef GL |
1059 | return ret; |
1060 | } | |
1061 | ||
3bfb4100 GL |
1062 | static int soc_camera_g_selection(struct file *file, void *fh, |
1063 | struct v4l2_selection *s) | |
1064 | { | |
1065 | struct soc_camera_device *icd = file->private_data; | |
1066 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
1067 | ||
1068 | /* With a wrong type no need to try to fall back to cropping */ | |
1069 | if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1070 | return -EINVAL; | |
1071 | ||
1072 | if (!ici->ops->get_selection) | |
1073 | return -ENOTTY; | |
1074 | ||
1075 | return ici->ops->get_selection(icd, s); | |
1076 | } | |
1077 | ||
1078 | static int soc_camera_s_selection(struct file *file, void *fh, | |
1079 | struct v4l2_selection *s) | |
1080 | { | |
1081 | struct soc_camera_device *icd = file->private_data; | |
1082 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
1083 | int ret; | |
1084 | ||
1085 | /* In all these cases cropping emulation will not help */ | |
1086 | if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || | |
eb3c311c SN |
1087 | (s->target != V4L2_SEL_TGT_COMPOSE && |
1088 | s->target != V4L2_SEL_TGT_CROP)) | |
3bfb4100 GL |
1089 | return -EINVAL; |
1090 | ||
eb3c311c | 1091 | if (s->target == V4L2_SEL_TGT_COMPOSE) { |
3bfb4100 GL |
1092 | /* No output size change during a running capture! */ |
1093 | if (is_streaming(ici, icd) && | |
1094 | (icd->user_width != s->r.width || | |
1095 | icd->user_height != s->r.height)) | |
1096 | return -EBUSY; | |
1097 | ||
1098 | /* | |
1099 | * Only one user is allowed to change the output format, touch | |
1100 | * buffers, start / stop streaming, poll for data | |
1101 | */ | |
1102 | if (icd->streamer && icd->streamer != file) | |
1103 | return -EBUSY; | |
1104 | } | |
1105 | ||
1106 | if (!ici->ops->set_selection) | |
1107 | return -ENOTTY; | |
1108 | ||
1109 | ret = ici->ops->set_selection(icd, s); | |
1110 | if (!ret && | |
eb3c311c | 1111 | s->target == V4L2_SEL_TGT_COMPOSE) { |
3bfb4100 GL |
1112 | icd->user_width = s->r.width; |
1113 | icd->user_height = s->r.height; | |
1114 | if (!icd->streamer) | |
1115 | icd->streamer = file; | |
1116 | } | |
1117 | ||
1118 | return ret; | |
1119 | } | |
1120 | ||
c9f6ef69 GL |
1121 | static int soc_camera_g_parm(struct file *file, void *fh, |
1122 | struct v4l2_streamparm *a) | |
1123 | { | |
57bee29d | 1124 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 1125 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9f6ef69 GL |
1126 | |
1127 | if (ici->ops->get_parm) | |
1128 | return ici->ops->get_parm(icd, a); | |
1129 | ||
1130 | return -ENOIOCTLCMD; | |
1131 | } | |
1132 | ||
1133 | static int soc_camera_s_parm(struct file *file, void *fh, | |
1134 | struct v4l2_streamparm *a) | |
1135 | { | |
57bee29d | 1136 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 1137 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9f6ef69 GL |
1138 | |
1139 | if (ici->ops->set_parm) | |
1140 | return ici->ops->set_parm(icd, a); | |
1141 | ||
1142 | return -ENOIOCTLCMD; | |
1143 | } | |
1144 | ||
e09da11d GL |
1145 | static int soc_camera_probe(struct soc_camera_host *ici, |
1146 | struct soc_camera_device *icd); | |
7dfff953 | 1147 | |
e55222ef GL |
1148 | /* So far this function cannot fail */ |
1149 | static void scan_add_host(struct soc_camera_host *ici) | |
1150 | { | |
1151 | struct soc_camera_device *icd; | |
1152 | ||
7d051b35 | 1153 | mutex_lock(&list_lock); |
e55222ef | 1154 | |
e09da11d | 1155 | list_for_each_entry(icd, &devices, list) |
e55222ef | 1156 | if (icd->iface == ici->nr) { |
e09da11d GL |
1157 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
1158 | struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; | |
1159 | ||
1160 | /* The camera could have been already on, try to reset */ | |
1161 | if (ssdd->reset) | |
1162 | ssdd->reset(icd->pdev); | |
1163 | ||
7dfff953 | 1164 | icd->parent = ici->v4l2_dev.dev; |
e09da11d GL |
1165 | |
1166 | /* Ignore errors */ | |
1167 | soc_camera_probe(ici, icd); | |
e55222ef | 1168 | } |
e55222ef | 1169 | |
7d051b35 | 1170 | mutex_unlock(&list_lock); |
e55222ef GL |
1171 | } |
1172 | ||
9aea470b GL |
1173 | /* |
1174 | * It is invalid to call v4l2_clk_enable() after a successful probing | |
1175 | * asynchronously outside of V4L2 operations, i.e. with .host_lock not held. | |
1176 | */ | |
1177 | static int soc_camera_clk_enable(struct v4l2_clk *clk) | |
1178 | { | |
1179 | struct soc_camera_device *icd = clk->priv; | |
1180 | struct soc_camera_host *ici; | |
e09da11d | 1181 | int ret; |
9aea470b GL |
1182 | |
1183 | if (!icd || !icd->parent) | |
1184 | return -ENODEV; | |
1185 | ||
1186 | ici = to_soc_camera_host(icd->parent); | |
1187 | ||
1188 | if (!try_module_get(ici->ops->owner)) | |
1189 | return -ENODEV; | |
1190 | ||
1191 | /* | |
1192 | * If a different client is currently being probed, the host will tell | |
1193 | * you to go | |
1194 | */ | |
e09da11d GL |
1195 | mutex_lock(&ici->clk_lock); |
1196 | ret = ici->ops->clock_start(ici); | |
1197 | mutex_unlock(&ici->clk_lock); | |
1198 | return ret; | |
9aea470b GL |
1199 | } |
1200 | ||
1201 | static void soc_camera_clk_disable(struct v4l2_clk *clk) | |
1202 | { | |
1203 | struct soc_camera_device *icd = clk->priv; | |
1204 | struct soc_camera_host *ici; | |
1205 | ||
1206 | if (!icd || !icd->parent) | |
1207 | return; | |
1208 | ||
1209 | ici = to_soc_camera_host(icd->parent); | |
1210 | ||
e09da11d | 1211 | mutex_lock(&ici->clk_lock); |
9aea470b | 1212 | ici->ops->clock_stop(ici); |
e09da11d | 1213 | mutex_unlock(&ici->clk_lock); |
9aea470b GL |
1214 | |
1215 | module_put(ici->ops->owner); | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | * Eventually, it would be more logical to make the respective host the clock | |
1220 | * owner, but then we would have to copy this struct for each ici. Besides, it | |
1221 | * would introduce the circular dependency problem, unless we port all client | |
1222 | * drivers to release the clock, when not in use. | |
1223 | */ | |
1224 | static const struct v4l2_clk_ops soc_camera_clk_ops = { | |
1225 | .owner = THIS_MODULE, | |
1226 | .enable = soc_camera_clk_enable, | |
1227 | .disable = soc_camera_clk_disable, | |
1228 | }; | |
1229 | ||
e09da11d GL |
1230 | static int soc_camera_dyn_pdev(struct soc_camera_desc *sdesc, |
1231 | struct soc_camera_async_client *sasc) | |
1232 | { | |
1233 | struct platform_device *pdev; | |
1234 | int ret, i; | |
1235 | ||
1236 | mutex_lock(&list_lock); | |
1237 | i = find_first_zero_bit(device_map, MAP_MAX_NUM); | |
1238 | if (i < MAP_MAX_NUM) | |
1239 | set_bit(i, device_map); | |
1240 | mutex_unlock(&list_lock); | |
1241 | if (i >= MAP_MAX_NUM) | |
1242 | return -ENOMEM; | |
1243 | ||
1244 | pdev = platform_device_alloc("soc-camera-pdrv", i); | |
1245 | if (!pdev) | |
1246 | return -ENOMEM; | |
1247 | ||
1248 | ret = platform_device_add_data(pdev, sdesc, sizeof(*sdesc)); | |
1249 | if (ret < 0) { | |
1250 | platform_device_put(pdev); | |
1251 | return ret; | |
1252 | } | |
1253 | ||
1254 | sasc->pdev = pdev; | |
1255 | ||
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static struct soc_camera_device *soc_camera_add_pdev(struct soc_camera_async_client *sasc) | |
1260 | { | |
1261 | struct platform_device *pdev = sasc->pdev; | |
1262 | int ret; | |
1263 | ||
1264 | ret = platform_device_add(pdev); | |
1265 | if (ret < 0 || !pdev->dev.driver) | |
1266 | return NULL; | |
1267 | ||
1268 | return platform_get_drvdata(pdev); | |
1269 | } | |
1270 | ||
1271 | /* Locking: called with .host_lock held */ | |
1272 | static int soc_camera_probe_finish(struct soc_camera_device *icd) | |
1273 | { | |
1274 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1275 | struct v4l2_mbus_framefmt mf; | |
1276 | int ret; | |
1277 | ||
1278 | sd->grp_id = soc_camera_grp_id(icd); | |
1279 | v4l2_set_subdev_hostdata(sd, icd); | |
1280 | ||
f6cc51a9 HV |
1281 | v4l2_subdev_call(sd, video, g_tvnorms, &icd->vdev->tvnorms); |
1282 | ||
e09da11d GL |
1283 | ret = v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler, NULL); |
1284 | if (ret < 0) | |
1285 | return ret; | |
1286 | ||
1287 | ret = soc_camera_add_device(icd); | |
1288 | if (ret < 0) { | |
1289 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); | |
1290 | return ret; | |
1291 | } | |
1292 | ||
1293 | /* At this point client .probe() should have run already */ | |
1294 | ret = soc_camera_init_user_formats(icd); | |
1295 | if (ret < 0) | |
1296 | goto eusrfmt; | |
1297 | ||
1298 | icd->field = V4L2_FIELD_ANY; | |
1299 | ||
1300 | ret = soc_camera_video_start(icd); | |
1301 | if (ret < 0) | |
1302 | goto evidstart; | |
1303 | ||
1304 | /* Try to improve our guess of a reasonable window format */ | |
1305 | if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) { | |
1306 | icd->user_width = mf.width; | |
1307 | icd->user_height = mf.height; | |
1308 | icd->colorspace = mf.colorspace; | |
1309 | icd->field = mf.field; | |
1310 | } | |
1311 | soc_camera_remove_device(icd); | |
1312 | ||
1313 | return 0; | |
1314 | ||
1315 | evidstart: | |
1316 | soc_camera_free_user_formats(icd); | |
1317 | eusrfmt: | |
1318 | soc_camera_remove_device(icd); | |
1319 | ||
1320 | return ret; | |
1321 | } | |
1322 | ||
40e2e092 | 1323 | #ifdef CONFIG_I2C_BOARDINFO |
e09da11d | 1324 | static int soc_camera_i2c_init(struct soc_camera_device *icd, |
25a34811 | 1325 | struct soc_camera_desc *sdesc) |
e55222ef | 1326 | { |
23272427 | 1327 | struct soc_camera_subdev_desc *ssdd; |
40e2e092 | 1328 | struct i2c_client *client; |
e09da11d | 1329 | struct soc_camera_host *ici; |
25a34811 | 1330 | struct soc_camera_host_desc *shd = &sdesc->host_desc; |
e09da11d | 1331 | struct i2c_adapter *adap; |
979ea1dd | 1332 | struct v4l2_subdev *subdev; |
9aea470b GL |
1333 | char clk_name[V4L2_SUBDEV_NAME_SIZE]; |
1334 | int ret; | |
e55222ef | 1335 | |
e09da11d GL |
1336 | /* First find out how we link the main client */ |
1337 | if (icd->sasc) { | |
1338 | /* Async non-OF probing handled by the subdevice list */ | |
1339 | return -EPROBE_DEFER; | |
1340 | } | |
1341 | ||
1342 | ici = to_soc_camera_host(icd->parent); | |
1343 | adap = i2c_get_adapter(shd->i2c_adapter_id); | |
40e2e092 | 1344 | if (!adap) { |
7dfff953 | 1345 | dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n", |
25a34811 | 1346 | shd->i2c_adapter_id); |
9aea470b | 1347 | return -ENODEV; |
40e2e092 | 1348 | } |
e55222ef | 1349 | |
93623c87 | 1350 | ssdd = kmemdup(&sdesc->subdev_desc, sizeof(*ssdd), GFP_KERNEL); |
23272427 GL |
1351 | if (!ssdd) { |
1352 | ret = -ENOMEM; | |
1353 | goto ealloc; | |
1354 | } | |
23272427 GL |
1355 | /* |
1356 | * In synchronous case we request regulators ourselves in | |
1357 | * soc_camera_pdrv_probe(), make sure the subdevice driver doesn't try | |
1358 | * to allocate them again. | |
1359 | */ | |
d3f884a7 GL |
1360 | ssdd->sd_pdata.num_regulators = 0; |
1361 | ssdd->sd_pdata.regulators = NULL; | |
23272427 | 1362 | shd->board_info->platform_data = ssdd; |
e55222ef | 1363 | |
9aea470b GL |
1364 | snprintf(clk_name, sizeof(clk_name), "%d-%04x", |
1365 | shd->i2c_adapter_id, shd->board_info->addr); | |
1366 | ||
1367 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd); | |
1368 | if (IS_ERR(icd->clk)) { | |
1369 | ret = PTR_ERR(icd->clk); | |
1370 | goto eclkreg; | |
1371 | } | |
1372 | ||
979ea1dd | 1373 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
25a34811 | 1374 | shd->board_info, NULL); |
9aea470b GL |
1375 | if (!subdev) { |
1376 | ret = -ENODEV; | |
40e2e092 | 1377 | goto ei2cnd; |
9aea470b | 1378 | } |
e55222ef | 1379 | |
c4ce6d14 | 1380 | client = v4l2_get_subdevdata(subdev); |
979ea1dd | 1381 | |
40e2e092 | 1382 | /* Use to_i2c_client(dev) to recover the i2c client */ |
7dfff953 | 1383 | icd->control = &client->dev; |
e55222ef | 1384 | |
40e2e092 GL |
1385 | return 0; |
1386 | ei2cnd: | |
9aea470b | 1387 | v4l2_clk_unregister(icd->clk); |
e09da11d | 1388 | icd->clk = NULL; |
23272427 GL |
1389 | eclkreg: |
1390 | kfree(ssdd); | |
1391 | ealloc: | |
40e2e092 | 1392 | i2c_put_adapter(adap); |
9aea470b | 1393 | return ret; |
e55222ef GL |
1394 | } |
1395 | ||
e09da11d | 1396 | static void soc_camera_i2c_free(struct soc_camera_device *icd) |
40e2e092 GL |
1397 | { |
1398 | struct i2c_client *client = | |
1399 | to_i2c_client(to_soc_camera_control(icd)); | |
e09da11d | 1400 | struct i2c_adapter *adap; |
23272427 | 1401 | struct soc_camera_subdev_desc *ssdd; |
7dfff953 GL |
1402 | |
1403 | icd->control = NULL; | |
e09da11d GL |
1404 | if (icd->sasc) |
1405 | return; | |
1406 | ||
1407 | adap = client->adapter; | |
23272427 | 1408 | ssdd = client->dev.platform_data; |
979ea1dd | 1409 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 | 1410 | i2c_unregister_device(client); |
c8dd7078 | 1411 | i2c_put_adapter(adap); |
23272427 | 1412 | kfree(ssdd); |
9aea470b GL |
1413 | v4l2_clk_unregister(icd->clk); |
1414 | icd->clk = NULL; | |
40e2e092 | 1415 | } |
e09da11d GL |
1416 | |
1417 | /* | |
1418 | * V4L2 asynchronous notifier callbacks. They are all called under a v4l2-async | |
1419 | * internal global mutex, therefore cannot race against other asynchronous | |
1420 | * events. Until notifier->complete() (soc_camera_async_complete()) is called, | |
1421 | * the video device node is not registered and no V4L fops can occur. Unloading | |
1422 | * of the host driver also calls a v4l2-async function, so also there we're | |
1423 | * protected. | |
1424 | */ | |
1425 | static int soc_camera_async_bound(struct v4l2_async_notifier *notifier, | |
1426 | struct v4l2_subdev *sd, | |
1427 | struct v4l2_async_subdev *asd) | |
1428 | { | |
1429 | struct soc_camera_async_client *sasc = container_of(notifier, | |
1430 | struct soc_camera_async_client, notifier); | |
1431 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); | |
1432 | ||
1433 | if (asd == sasc->sensor && !WARN_ON(icd->control)) { | |
1434 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
1435 | ||
1436 | /* | |
1437 | * Only now we get subdevice-specific information like | |
1438 | * regulators, flags, callbacks, etc. | |
1439 | */ | |
1440 | if (client) { | |
1441 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); | |
1442 | struct soc_camera_subdev_desc *ssdd = | |
1443 | soc_camera_i2c_to_desc(client); | |
1444 | if (ssdd) { | |
1445 | memcpy(&sdesc->subdev_desc, ssdd, | |
1446 | sizeof(sdesc->subdev_desc)); | |
1447 | if (ssdd->reset) | |
1448 | ssdd->reset(icd->pdev); | |
1449 | } | |
1450 | ||
1451 | icd->control = &client->dev; | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | static void soc_camera_async_unbind(struct v4l2_async_notifier *notifier, | |
1459 | struct v4l2_subdev *sd, | |
1460 | struct v4l2_async_subdev *asd) | |
1461 | { | |
1462 | struct soc_camera_async_client *sasc = container_of(notifier, | |
1463 | struct soc_camera_async_client, notifier); | |
1464 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); | |
1465 | ||
1466 | if (icd->clk) { | |
1467 | v4l2_clk_unregister(icd->clk); | |
1468 | icd->clk = NULL; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | static int soc_camera_async_complete(struct v4l2_async_notifier *notifier) | |
1473 | { | |
1474 | struct soc_camera_async_client *sasc = container_of(notifier, | |
1475 | struct soc_camera_async_client, notifier); | |
1476 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); | |
1477 | ||
1478 | if (to_soc_camera_control(icd)) { | |
1479 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
1480 | int ret; | |
1481 | ||
1482 | mutex_lock(&list_lock); | |
1483 | ret = soc_camera_probe(ici, icd); | |
1484 | mutex_unlock(&list_lock); | |
1485 | if (ret < 0) | |
1486 | return ret; | |
1487 | } | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static int scan_async_group(struct soc_camera_host *ici, | |
f687f326 | 1493 | struct v4l2_async_subdev **asd, unsigned int size) |
e09da11d GL |
1494 | { |
1495 | struct soc_camera_async_subdev *sasd; | |
1496 | struct soc_camera_async_client *sasc; | |
1497 | struct soc_camera_device *icd; | |
1498 | struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; | |
1499 | char clk_name[V4L2_SUBDEV_NAME_SIZE]; | |
85e86c6e HV |
1500 | unsigned int i; |
1501 | int ret; | |
e09da11d GL |
1502 | |
1503 | /* First look for a sensor */ | |
1504 | for (i = 0; i < size; i++) { | |
1505 | sasd = container_of(asd[i], struct soc_camera_async_subdev, asd); | |
1506 | if (sasd->role == SOCAM_SUBDEV_DATA_SOURCE) | |
1507 | break; | |
1508 | } | |
1509 | ||
85e86c6e | 1510 | if (i >= size || asd[i]->match_type != V4L2_ASYNC_MATCH_I2C) { |
e09da11d GL |
1511 | /* All useless */ |
1512 | dev_err(ici->v4l2_dev.dev, "No I2C data source found!\n"); | |
1513 | return -ENODEV; | |
1514 | } | |
1515 | ||
1516 | /* Or shall this be managed by the soc-camera device? */ | |
1517 | sasc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sasc), GFP_KERNEL); | |
1518 | if (!sasc) | |
1519 | return -ENOMEM; | |
1520 | ||
1521 | /* HACK: just need a != NULL */ | |
1522 | sdesc.host_desc.board_info = ERR_PTR(-ENODATA); | |
1523 | ||
1524 | ret = soc_camera_dyn_pdev(&sdesc, sasc); | |
1525 | if (ret < 0) | |
057c2a2e | 1526 | goto eallocpdev; |
e09da11d GL |
1527 | |
1528 | sasc->sensor = &sasd->asd; | |
1529 | ||
1530 | icd = soc_camera_add_pdev(sasc); | |
1531 | if (!icd) { | |
057c2a2e GL |
1532 | ret = -ENOMEM; |
1533 | goto eaddpdev; | |
e09da11d GL |
1534 | } |
1535 | ||
e8419d08 | 1536 | sasc->notifier.subdevs = asd; |
e09da11d GL |
1537 | sasc->notifier.num_subdevs = size; |
1538 | sasc->notifier.bound = soc_camera_async_bound; | |
1539 | sasc->notifier.unbind = soc_camera_async_unbind; | |
1540 | sasc->notifier.complete = soc_camera_async_complete; | |
1541 | ||
1542 | icd->sasc = sasc; | |
1543 | icd->parent = ici->v4l2_dev.dev; | |
1544 | ||
1545 | snprintf(clk_name, sizeof(clk_name), "%d-%04x", | |
1546 | sasd->asd.match.i2c.adapter_id, sasd->asd.match.i2c.address); | |
1547 | ||
1548 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd); | |
1549 | if (IS_ERR(icd->clk)) { | |
1550 | ret = PTR_ERR(icd->clk); | |
1551 | goto eclkreg; | |
1552 | } | |
1553 | ||
1554 | ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); | |
1555 | if (!ret) | |
1556 | return 0; | |
1557 | ||
1558 | v4l2_clk_unregister(icd->clk); | |
1559 | eclkreg: | |
1560 | icd->clk = NULL; | |
057c2a2e GL |
1561 | platform_device_del(sasc->pdev); |
1562 | eaddpdev: | |
1563 | platform_device_put(sasc->pdev); | |
1564 | eallocpdev: | |
1565 | devm_kfree(ici->v4l2_dev.dev, sasc); | |
e09da11d GL |
1566 | dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); |
1567 | ||
1568 | return ret; | |
1569 | } | |
1570 | ||
1571 | static void scan_async_host(struct soc_camera_host *ici) | |
1572 | { | |
1573 | struct v4l2_async_subdev **asd; | |
1574 | int j; | |
1575 | ||
1576 | for (j = 0, asd = ici->asd; ici->asd_sizes[j]; j++) { | |
1577 | scan_async_group(ici, asd, ici->asd_sizes[j]); | |
1578 | asd += ici->asd_sizes[j]; | |
1579 | } | |
1580 | } | |
40e2e092 | 1581 | #else |
e09da11d GL |
1582 | #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) |
1583 | #define soc_camera_i2c_free(icd) do {} while (0) | |
1584 | #define scan_async_host(ici) do {} while (0) | |
40e2e092 GL |
1585 | #endif |
1586 | ||
1ddc6a6c BD |
1587 | #ifdef CONFIG_OF |
1588 | ||
1589 | struct soc_of_info { | |
1590 | struct soc_camera_async_subdev sasd; | |
1591 | struct soc_camera_async_client sasc; | |
1592 | struct v4l2_async_subdev *subdev; | |
1593 | }; | |
1594 | ||
1595 | static int soc_of_bind(struct soc_camera_host *ici, | |
1596 | struct device_node *ep, | |
1597 | struct device_node *remote) | |
1598 | { | |
1599 | struct soc_camera_device *icd; | |
1600 | struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; | |
1601 | struct soc_camera_async_client *sasc; | |
1602 | struct soc_of_info *info; | |
1603 | struct i2c_client *client; | |
1604 | char clk_name[V4L2_SUBDEV_NAME_SIZE]; | |
1605 | int ret; | |
1606 | ||
1607 | /* allocate a new subdev and add match info to it */ | |
1608 | info = devm_kzalloc(ici->v4l2_dev.dev, sizeof(struct soc_of_info), | |
1609 | GFP_KERNEL); | |
1610 | if (!info) | |
1611 | return -ENOMEM; | |
1612 | ||
1613 | info->sasd.asd.match.of.node = remote; | |
1614 | info->sasd.asd.match_type = V4L2_ASYNC_MATCH_OF; | |
1615 | info->subdev = &info->sasd.asd; | |
1616 | ||
1617 | /* Or shall this be managed by the soc-camera device? */ | |
1618 | sasc = &info->sasc; | |
1619 | ||
1620 | /* HACK: just need a != NULL */ | |
1621 | sdesc.host_desc.board_info = ERR_PTR(-ENODATA); | |
1622 | ||
1623 | ret = soc_camera_dyn_pdev(&sdesc, sasc); | |
1624 | if (ret < 0) | |
1625 | goto eallocpdev; | |
1626 | ||
1627 | sasc->sensor = &info->sasd.asd; | |
1628 | ||
1629 | icd = soc_camera_add_pdev(sasc); | |
1630 | if (!icd) { | |
1631 | ret = -ENOMEM; | |
1632 | goto eaddpdev; | |
1633 | } | |
1634 | ||
1635 | sasc->notifier.subdevs = &info->subdev; | |
1636 | sasc->notifier.num_subdevs = 1; | |
1637 | sasc->notifier.bound = soc_camera_async_bound; | |
1638 | sasc->notifier.unbind = soc_camera_async_unbind; | |
1639 | sasc->notifier.complete = soc_camera_async_complete; | |
1640 | ||
1641 | icd->sasc = sasc; | |
1642 | icd->parent = ici->v4l2_dev.dev; | |
1643 | ||
1644 | client = of_find_i2c_device_by_node(remote); | |
1645 | ||
1646 | if (client) | |
1647 | snprintf(clk_name, sizeof(clk_name), "%d-%04x", | |
1648 | client->adapter->nr, client->addr); | |
1649 | else | |
1650 | snprintf(clk_name, sizeof(clk_name), "of-%s", | |
1651 | of_node_full_name(remote)); | |
1652 | ||
1653 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, "mclk", icd); | |
1654 | if (IS_ERR(icd->clk)) { | |
1655 | ret = PTR_ERR(icd->clk); | |
1656 | goto eclkreg; | |
1657 | } | |
1658 | ||
1659 | ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); | |
1660 | if (!ret) | |
1661 | return 0; | |
1662 | eclkreg: | |
1663 | icd->clk = NULL; | |
1664 | platform_device_del(sasc->pdev); | |
1665 | eaddpdev: | |
1666 | platform_device_put(sasc->pdev); | |
1667 | eallocpdev: | |
1668 | devm_kfree(ici->v4l2_dev.dev, sasc); | |
1669 | dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); | |
1670 | ||
1671 | return ret; | |
1672 | } | |
1673 | ||
1674 | static void scan_of_host(struct soc_camera_host *ici) | |
1675 | { | |
1676 | struct device *dev = ici->v4l2_dev.dev; | |
1677 | struct device_node *np = dev->of_node; | |
1678 | struct device_node *epn = NULL, *ren; | |
1679 | unsigned int i; | |
1680 | ||
1681 | for (i = 0; ; i++) { | |
1682 | epn = of_graph_get_next_endpoint(np, epn); | |
1683 | if (!epn) | |
1684 | break; | |
1685 | ||
1686 | ren = of_graph_get_remote_port(epn); | |
1687 | if (!ren) { | |
1688 | dev_notice(dev, "no remote for %s\n", | |
1689 | of_node_full_name(epn)); | |
1690 | continue; | |
1691 | } | |
1692 | ||
1693 | /* so we now have a remote node to connect */ | |
1694 | if (!i) | |
1695 | soc_of_bind(ici, epn, ren->parent); | |
1696 | ||
1697 | of_node_put(epn); | |
1698 | of_node_put(ren); | |
1699 | ||
1700 | if (i) { | |
1701 | dev_err(dev, "multiple subdevices aren't supported yet!\n"); | |
1702 | break; | |
1703 | } | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | #else | |
1708 | static inline void scan_of_host(struct soc_camera_host *ici) { } | |
1709 | #endif | |
1710 | ||
40e2e092 | 1711 | /* Called during host-driver probe */ |
e09da11d GL |
1712 | static int soc_camera_probe(struct soc_camera_host *ici, |
1713 | struct soc_camera_device *icd) | |
e55222ef | 1714 | { |
25a34811 GL |
1715 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
1716 | struct soc_camera_host_desc *shd = &sdesc->host_desc; | |
979ea1dd | 1717 | struct device *control = NULL; |
e55222ef GL |
1718 | int ret; |
1719 | ||
7dfff953 | 1720 | dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev)); |
1c3bb743 | 1721 | |
ee02da64 HV |
1722 | /* |
1723 | * Currently the subdev with the largest number of controls (13) is | |
1724 | * ov6550. So let's pick 16 as a hint for the control handler. Note | |
1725 | * that this is a hint only: too large and you waste some memory, too | |
1726 | * small and there is a (very) small performance hit when looking up | |
1727 | * controls in the internal hash. | |
1728 | */ | |
1729 | ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16); | |
1730 | if (ret < 0) | |
1731 | return ret; | |
1732 | ||
979ea1dd | 1733 | /* Must have icd->vdev before registering the device */ |
40e2e092 GL |
1734 | ret = video_dev_create(icd); |
1735 | if (ret < 0) | |
1736 | goto evdc; | |
1c3bb743 | 1737 | |
9aea470b GL |
1738 | /* |
1739 | * ..._video_start() will create a device node, video_register_device() | |
1740 | * itself is protected against concurrent open() calls, but we also have | |
1741 | * to protect our data also during client probing. | |
1742 | */ | |
9aea470b | 1743 | |
40e2e092 | 1744 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
25a34811 | 1745 | if (shd->board_info) { |
e09da11d GL |
1746 | ret = soc_camera_i2c_init(icd, sdesc); |
1747 | if (ret < 0 && ret != -EPROBE_DEFER) | |
9aea470b | 1748 | goto eadd; |
25a34811 | 1749 | } else if (!shd->add_device || !shd->del_device) { |
1c3bb743 | 1750 | ret = -EINVAL; |
9aea470b | 1751 | goto eadd; |
40e2e092 | 1752 | } else { |
e09da11d | 1753 | mutex_lock(&ici->clk_lock); |
9aea470b | 1754 | ret = ici->ops->clock_start(ici); |
e09da11d | 1755 | mutex_unlock(&ici->clk_lock); |
9aea470b GL |
1756 | if (ret < 0) |
1757 | goto eadd; | |
1758 | ||
25a34811 GL |
1759 | if (shd->module_name) |
1760 | ret = request_module(shd->module_name); | |
979ea1dd | 1761 | |
25a34811 | 1762 | ret = shd->add_device(icd); |
40e2e092 GL |
1763 | if (ret < 0) |
1764 | goto eadddev; | |
1c3bb743 | 1765 | |
96c75399 GL |
1766 | /* |
1767 | * FIXME: this is racy, have to use driver-binding notification, | |
1768 | * when it is available | |
1769 | */ | |
979ea1dd | 1770 | control = to_soc_camera_control(icd); |
08590b96 | 1771 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd | 1772 | !try_module_get(control->driver->owner)) { |
25a34811 | 1773 | shd->del_device(icd); |
7ae77ee9 | 1774 | ret = -ENODEV; |
979ea1dd GL |
1775 | goto enodrv; |
1776 | } | |
40e2e092 | 1777 | } |
e55222ef | 1778 | |
e09da11d GL |
1779 | mutex_lock(&ici->host_lock); |
1780 | ret = soc_camera_probe_finish(icd); | |
dd669e90 | 1781 | mutex_unlock(&ici->host_lock); |
e09da11d GL |
1782 | if (ret < 0) |
1783 | goto efinish; | |
025c18a1 | 1784 | |
40e2e092 | 1785 | return 0; |
e55222ef | 1786 | |
e09da11d | 1787 | efinish: |
25a34811 | 1788 | if (shd->board_info) { |
e09da11d | 1789 | soc_camera_i2c_free(icd); |
979ea1dd | 1790 | } else { |
25a34811 | 1791 | shd->del_device(icd); |
979ea1dd | 1792 | module_put(control->driver->owner); |
979ea1dd | 1793 | enodrv: |
40e2e092 | 1794 | eadddev: |
e09da11d | 1795 | mutex_lock(&ici->clk_lock); |
9aea470b | 1796 | ici->ops->clock_stop(ici); |
e09da11d | 1797 | mutex_unlock(&ici->clk_lock); |
9aea470b GL |
1798 | } |
1799 | eadd: | |
e09da11d GL |
1800 | if (icd->vdev) { |
1801 | video_device_release(icd->vdev); | |
1802 | icd->vdev = NULL; | |
1803 | } | |
9aea470b | 1804 | evdc: |
ee02da64 | 1805 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
e55222ef GL |
1806 | return ret; |
1807 | } | |
1808 | ||
5d28d525 GL |
1809 | /* |
1810 | * This is called on device_unregister, which only means we have to disconnect | |
e09da11d GL |
1811 | * from the host, but not remove ourselves from the device list. With |
1812 | * asynchronous client probing this can also be called without | |
1813 | * soc_camera_probe_finish() having run. Careful with clean up. | |
5d28d525 | 1814 | */ |
7dfff953 | 1815 | static int soc_camera_remove(struct soc_camera_device *icd) |
e55222ef | 1816 | { |
25a34811 | 1817 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
40e2e092 | 1818 | struct video_device *vdev = icd->vdev; |
e55222ef | 1819 | |
ee02da64 | 1820 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
40e2e092 | 1821 | if (vdev) { |
40e2e092 GL |
1822 | video_unregister_device(vdev); |
1823 | icd->vdev = NULL; | |
40e2e092 GL |
1824 | } |
1825 | ||
25a34811 | 1826 | if (sdesc->host_desc.board_info) { |
e09da11d | 1827 | soc_camera_i2c_free(icd); |
979ea1dd | 1828 | } else { |
e09da11d GL |
1829 | struct device *dev = to_soc_camera_control(icd); |
1830 | struct device_driver *drv = dev ? dev->driver : NULL; | |
979ea1dd | 1831 | if (drv) { |
25a34811 | 1832 | sdesc->host_desc.del_device(icd); |
979ea1dd GL |
1833 | module_put(drv->owner); |
1834 | } | |
1835 | } | |
e09da11d GL |
1836 | |
1837 | if (icd->num_user_formats) | |
1838 | soc_camera_free_user_formats(icd); | |
1839 | ||
1840 | if (icd->clk) { | |
1841 | /* For the synchronous case */ | |
1842 | v4l2_clk_unregister(icd->clk); | |
1843 | icd->clk = NULL; | |
1844 | } | |
1845 | ||
1846 | if (icd->sasc) | |
1847 | platform_device_unregister(icd->sasc->pdev); | |
025c18a1 | 1848 | |
e55222ef GL |
1849 | return 0; |
1850 | } | |
1851 | ||
6a6c8786 GL |
1852 | static int default_cropcap(struct soc_camera_device *icd, |
1853 | struct v4l2_cropcap *a) | |
1854 | { | |
1855 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1856 | return v4l2_subdev_call(sd, video, cropcap, a); | |
1857 | } | |
1858 | ||
1859 | static int default_g_crop(struct soc_camera_device *icd, struct v4l2_crop *a) | |
1860 | { | |
1861 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1862 | return v4l2_subdev_call(sd, video, g_crop, a); | |
1863 | } | |
1864 | ||
4f996594 | 1865 | static int default_s_crop(struct soc_camera_device *icd, const struct v4l2_crop *a) |
6a6c8786 GL |
1866 | { |
1867 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1868 | return v4l2_subdev_call(sd, video, s_crop, a); | |
1869 | } | |
1870 | ||
06e17821 JK |
1871 | static int default_g_parm(struct soc_camera_device *icd, |
1872 | struct v4l2_streamparm *parm) | |
1873 | { | |
1874 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1875 | return v4l2_subdev_call(sd, video, g_parm, parm); | |
1876 | } | |
1877 | ||
1878 | static int default_s_parm(struct soc_camera_device *icd, | |
1879 | struct v4l2_streamparm *parm) | |
1880 | { | |
1881 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1882 | return v4l2_subdev_call(sd, video, s_parm, parm); | |
1883 | } | |
1884 | ||
ad3537b5 GL |
1885 | static int default_enum_framesizes(struct soc_camera_device *icd, |
1886 | struct v4l2_frmsizeenum *fsize) | |
ed5b65dc QX |
1887 | { |
1888 | int ret; | |
1889 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1890 | const struct soc_camera_format_xlate *xlate; | |
1891 | __u32 pixfmt = fsize->pixel_format; | |
1892 | struct v4l2_frmsizeenum fsize_mbus = *fsize; | |
1893 | ||
1894 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); | |
1895 | if (!xlate) | |
1896 | return -EINVAL; | |
1897 | /* map xlate-code to pixel_format, sensor only handle xlate-code*/ | |
1898 | fsize_mbus.pixel_format = xlate->code; | |
1899 | ||
9633c086 | 1900 | ret = v4l2_subdev_call(sd, video, enum_framesizes, &fsize_mbus); |
ed5b65dc QX |
1901 | if (ret < 0) |
1902 | return ret; | |
1903 | ||
1904 | *fsize = fsize_mbus; | |
1905 | fsize->pixel_format = pixfmt; | |
1906 | ||
1907 | return 0; | |
1908 | } | |
1909 | ||
b8d9904c | 1910 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1911 | { |
e55222ef | 1912 | struct soc_camera_host *ix; |
979ea1dd | 1913 | int ret; |
e55222ef | 1914 | |
64f5905e GL |
1915 | if (!ici || !ici->ops || |
1916 | !ici->ops->try_fmt || | |
1917 | !ici->ops->set_fmt || | |
1918 | !ici->ops->set_bus_param || | |
1919 | !ici->ops->querycap || | |
592c2aba GL |
1920 | ((!ici->ops->init_videobuf || |
1921 | !ici->ops->reqbufs) && | |
1922 | !ici->ops->init_videobuf2) || | |
a78fcc11 GL |
1923 | !ici->ops->clock_start || |
1924 | !ici->ops->clock_stop || | |
eff505fa | 1925 | !ici->ops->poll || |
979ea1dd | 1926 | !ici->v4l2_dev.dev) |
e55222ef GL |
1927 | return -EINVAL; |
1928 | ||
6a6c8786 GL |
1929 | if (!ici->ops->set_crop) |
1930 | ici->ops->set_crop = default_s_crop; | |
1931 | if (!ici->ops->get_crop) | |
1932 | ici->ops->get_crop = default_g_crop; | |
1933 | if (!ici->ops->cropcap) | |
1934 | ici->ops->cropcap = default_cropcap; | |
06e17821 JK |
1935 | if (!ici->ops->set_parm) |
1936 | ici->ops->set_parm = default_s_parm; | |
1937 | if (!ici->ops->get_parm) | |
1938 | ici->ops->get_parm = default_g_parm; | |
ad3537b5 GL |
1939 | if (!ici->ops->enum_framesizes) |
1940 | ici->ops->enum_framesizes = default_enum_framesizes; | |
6a6c8786 | 1941 | |
e55222ef GL |
1942 | mutex_lock(&list_lock); |
1943 | list_for_each_entry(ix, &hosts, list) { | |
1944 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1945 | ret = -EBUSY; |
1946 | goto edevreg; | |
e55222ef GL |
1947 | } |
1948 | } | |
1949 | ||
979ea1dd GL |
1950 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1951 | if (ret < 0) | |
1952 | goto edevreg; | |
eff505fa | 1953 | |
e55222ef GL |
1954 | list_add_tail(&ici->list, &hosts); |
1955 | mutex_unlock(&list_lock); | |
1956 | ||
2f9a0c88 | 1957 | mutex_init(&ici->host_lock); |
e09da11d GL |
1958 | mutex_init(&ici->clk_lock); |
1959 | ||
1ddc6a6c BD |
1960 | if (ici->v4l2_dev.dev->of_node) |
1961 | scan_of_host(ici); | |
1962 | else if (ici->asd_sizes) | |
e09da11d GL |
1963 | /* |
1964 | * No OF, host with a list of subdevices. Don't try to mix | |
1965 | * modes by initialising some groups statically and some | |
1966 | * dynamically! | |
1967 | */ | |
1968 | scan_async_host(ici); | |
1969 | else | |
1970 | /* Legacy: static platform devices from board data */ | |
1971 | scan_add_host(ici); | |
e55222ef GL |
1972 | |
1973 | return 0; | |
979ea1dd GL |
1974 | |
1975 | edevreg: | |
1976 | mutex_unlock(&list_lock); | |
1977 | return ret; | |
e55222ef GL |
1978 | } |
1979 | EXPORT_SYMBOL(soc_camera_host_register); | |
1980 | ||
1981 | /* Unregister all clients! */ | |
1982 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1983 | { | |
e09da11d GL |
1984 | struct soc_camera_device *icd, *tmp; |
1985 | struct soc_camera_async_client *sasc; | |
1986 | LIST_HEAD(notifiers); | |
e55222ef GL |
1987 | |
1988 | mutex_lock(&list_lock); | |
e55222ef | 1989 | list_del(&ici->list); |
7dfff953 | 1990 | list_for_each_entry(icd, &devices, list) |
e09da11d GL |
1991 | if (icd->iface == ici->nr && icd->sasc) { |
1992 | /* as long as we hold the device, sasc won't be freed */ | |
1993 | get_device(icd->pdev); | |
1994 | list_add(&icd->sasc->list, ¬ifiers); | |
1995 | } | |
1996 | mutex_unlock(&list_lock); | |
1997 | ||
1998 | list_for_each_entry(sasc, ¬ifiers, list) { | |
1999 | /* Must call unlocked to avoid AB-BA dead-lock */ | |
2000 | v4l2_async_notifier_unregister(&sasc->notifier); | |
2001 | put_device(&sasc->pdev->dev); | |
2002 | } | |
2003 | ||
2004 | mutex_lock(&list_lock); | |
2005 | ||
2006 | list_for_each_entry_safe(icd, tmp, &devices, list) | |
2007 | if (icd->iface == ici->nr) | |
7dfff953 | 2008 | soc_camera_remove(icd); |
e55222ef GL |
2009 | |
2010 | mutex_unlock(&list_lock); | |
2011 | ||
979ea1dd | 2012 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
2013 | } |
2014 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
2015 | ||
2016 | /* Image capture device */ | |
40e2e092 | 2017 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
2018 | { |
2019 | struct soc_camera_device *ix; | |
2020 | int num = -1, i; | |
2021 | ||
e09da11d | 2022 | mutex_lock(&list_lock); |
e55222ef GL |
2023 | for (i = 0; i < 256 && num < 0; i++) { |
2024 | num = i; | |
40e2e092 | 2025 | /* Check if this index is available on this interface */ |
e55222ef GL |
2026 | list_for_each_entry(ix, &devices, list) { |
2027 | if (ix->iface == icd->iface && ix->devnum == i) { | |
2028 | num = -1; | |
2029 | break; | |
2030 | } | |
2031 | } | |
2032 | } | |
2033 | ||
e09da11d | 2034 | if (num < 0) { |
5d28d525 GL |
2035 | /* |
2036 | * ok, we have 256 cameras on this host... | |
2037 | * man, stay reasonable... | |
2038 | */ | |
e09da11d | 2039 | mutex_unlock(&list_lock); |
e55222ef | 2040 | return -ENOMEM; |
e09da11d | 2041 | } |
e55222ef | 2042 | |
64ff9ba5 | 2043 | icd->devnum = num; |
64f5905e GL |
2044 | icd->use_count = 0; |
2045 | icd->host_priv = NULL; | |
e55222ef | 2046 | |
e09da11d GL |
2047 | /* |
2048 | * Dynamically allocated devices set the bit earlier, but it doesn't hurt setting | |
2049 | * it again | |
2050 | */ | |
2051 | i = to_platform_device(icd->pdev)->id; | |
2052 | if (i < 0) | |
2053 | /* One static (legacy) soc-camera platform device */ | |
2054 | i = 0; | |
2055 | if (i >= MAP_MAX_NUM) { | |
2056 | mutex_unlock(&list_lock); | |
2057 | return -EBUSY; | |
2058 | } | |
2059 | set_bit(i, device_map); | |
40e2e092 | 2060 | list_add_tail(&icd->list, &devices); |
e09da11d | 2061 | mutex_unlock(&list_lock); |
40e2e092 GL |
2062 | |
2063 | return 0; | |
e55222ef | 2064 | } |
e55222ef | 2065 | |
a399810c HV |
2066 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
2067 | .vidioc_querycap = soc_camera_querycap, | |
7ae77ee9 | 2068 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, |
a399810c | 2069 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, |
a399810c | 2070 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, |
7ae77ee9 | 2071 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, |
a399810c HV |
2072 | .vidioc_enum_input = soc_camera_enum_input, |
2073 | .vidioc_g_input = soc_camera_g_input, | |
2074 | .vidioc_s_input = soc_camera_s_input, | |
2075 | .vidioc_s_std = soc_camera_s_std, | |
2f0babb7 | 2076 | .vidioc_g_std = soc_camera_g_std, |
ad3537b5 | 2077 | .vidioc_enum_framesizes = soc_camera_enum_framesizes, |
a399810c | 2078 | .vidioc_reqbufs = soc_camera_reqbufs, |
a399810c HV |
2079 | .vidioc_querybuf = soc_camera_querybuf, |
2080 | .vidioc_qbuf = soc_camera_qbuf, | |
2081 | .vidioc_dqbuf = soc_camera_dqbuf, | |
7ae77ee9 GL |
2082 | .vidioc_create_bufs = soc_camera_create_bufs, |
2083 | .vidioc_prepare_buf = soc_camera_prepare_buf, | |
c710f591 | 2084 | .vidioc_expbuf = soc_camera_expbuf, |
a399810c HV |
2085 | .vidioc_streamon = soc_camera_streamon, |
2086 | .vidioc_streamoff = soc_camera_streamoff, | |
a399810c HV |
2087 | .vidioc_cropcap = soc_camera_cropcap, |
2088 | .vidioc_g_crop = soc_camera_g_crop, | |
2089 | .vidioc_s_crop = soc_camera_s_crop, | |
3bfb4100 GL |
2090 | .vidioc_g_selection = soc_camera_g_selection, |
2091 | .vidioc_s_selection = soc_camera_s_selection, | |
c9f6ef69 GL |
2092 | .vidioc_g_parm = soc_camera_g_parm, |
2093 | .vidioc_s_parm = soc_camera_s_parm, | |
a399810c HV |
2094 | }; |
2095 | ||
40e2e092 | 2096 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef | 2097 | { |
7dfff953 | 2098 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
40e2e092 | 2099 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 2100 | |
e55222ef | 2101 | if (!vdev) |
40e2e092 | 2102 | return -ENOMEM; |
e55222ef GL |
2103 | |
2104 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 2105 | |
14381c26 | 2106 | vdev->v4l2_dev = &ici->v4l2_dev; |
e55222ef | 2107 | vdev->fops = &soc_camera_fops; |
a399810c | 2108 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 2109 | vdev->release = video_device_release; |
ee02da64 | 2110 | vdev->ctrl_handler = &icd->ctrl_handler; |
dd669e90 | 2111 | vdev->lock = &ici->host_lock; |
e55222ef | 2112 | |
e55222ef GL |
2113 | icd->vdev = vdev; |
2114 | ||
2115 | return 0; | |
40e2e092 | 2116 | } |
e55222ef | 2117 | |
40e2e092 | 2118 | /* |
dd669e90 | 2119 | * Called from soc_camera_probe() above with .host_lock held |
40e2e092 | 2120 | */ |
979ea1dd | 2121 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 2122 | { |
d364ee4f | 2123 | const struct device_type *type = icd->vdev->dev.type; |
979ea1dd | 2124 | int ret; |
40e2e092 | 2125 | |
7dfff953 | 2126 | if (!icd->parent) |
40e2e092 GL |
2127 | return -ENODEV; |
2128 | ||
14381c26 | 2129 | video_set_drvdata(icd->vdev, icd); |
f6cc51a9 HV |
2130 | if (icd->vdev->tvnorms == 0) { |
2131 | /* disable the STD API if there are no tvnorms defined */ | |
2132 | v4l2_disable_ioctl(icd->vdev, VIDIOC_G_STD); | |
2133 | v4l2_disable_ioctl(icd->vdev, VIDIOC_S_STD); | |
2134 | v4l2_disable_ioctl(icd->vdev, VIDIOC_ENUMSTD); | |
2135 | } | |
46b21094 | 2136 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd | 2137 | if (ret < 0) { |
7dfff953 | 2138 | dev_err(icd->pdev, "video_register_device failed: %d\n", ret); |
979ea1dd GL |
2139 | return ret; |
2140 | } | |
40e2e092 | 2141 | |
4f9fb5ed MCC |
2142 | /* Restore device type, possibly set by the subdevice driver */ |
2143 | icd->vdev->dev.type = type; | |
2144 | ||
979ea1dd | 2145 | return 0; |
e55222ef | 2146 | } |
e55222ef | 2147 | |
4c62e976 | 2148 | static int soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 2149 | { |
25a34811 GL |
2150 | struct soc_camera_desc *sdesc = pdev->dev.platform_data; |
2151 | struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; | |
40e2e092 | 2152 | struct soc_camera_device *icd; |
8a97d4c1 | 2153 | int ret; |
0fd327bd | 2154 | |
25a34811 | 2155 | if (!sdesc) |
40e2e092 | 2156 | return -EINVAL; |
0fd327bd | 2157 | |
02249369 | 2158 | icd = devm_kzalloc(&pdev->dev, sizeof(*icd), GFP_KERNEL); |
40e2e092 GL |
2159 | if (!icd) |
2160 | return -ENOMEM; | |
0fd327bd | 2161 | |
e09da11d GL |
2162 | /* |
2163 | * In the asynchronous case ssdd->num_regulators == 0 yet, so, the below | |
23272427 GL |
2164 | * regulator allocation is a dummy. They are actually requested by the |
2165 | * subdevice driver, using soc_camera_power_init(). Also note, that in | |
2166 | * that case regulators are attached to the I2C device and not to the | |
2167 | * camera platform device. | |
e09da11d | 2168 | */ |
d3f884a7 GL |
2169 | ret = devm_regulator_bulk_get(&pdev->dev, ssdd->sd_pdata.num_regulators, |
2170 | ssdd->sd_pdata.regulators); | |
8a97d4c1 GL |
2171 | if (ret < 0) |
2172 | return ret; | |
2173 | ||
25a34811 GL |
2174 | icd->iface = sdesc->host_desc.bus_id; |
2175 | icd->sdesc = sdesc; | |
979ea1dd | 2176 | icd->pdev = &pdev->dev; |
40e2e092 | 2177 | platform_set_drvdata(pdev, icd); |
0fd327bd | 2178 | |
6a6c8786 GL |
2179 | icd->user_width = DEFAULT_WIDTH; |
2180 | icd->user_height = DEFAULT_HEIGHT; | |
2181 | ||
02249369 | 2182 | return soc_camera_device_register(icd); |
c41debaf | 2183 | } |
0fd327bd | 2184 | |
5d28d525 GL |
2185 | /* |
2186 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 2187 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
2188 | * been unloaded already |
2189 | */ | |
4c62e976 | 2190 | static int soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 2191 | { |
40e2e092 | 2192 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
e09da11d | 2193 | int i; |
c41debaf | 2194 | |
40e2e092 | 2195 | if (!icd) |
c41debaf GL |
2196 | return -EINVAL; |
2197 | ||
e09da11d GL |
2198 | i = pdev->id; |
2199 | if (i < 0) | |
2200 | i = 0; | |
2201 | ||
2202 | /* | |
2203 | * In synchronous mode with static platform devices this is called in a | |
2204 | * loop from drivers/base/dd.c::driver_detach(), no parallel execution, | |
2205 | * no need to lock. In asynchronous case the caller - | |
2206 | * soc_camera_host_unregister() - already holds the lock | |
2207 | */ | |
2208 | if (test_bit(i, device_map)) { | |
2209 | clear_bit(i, device_map); | |
2210 | list_del(&icd->list); | |
2211 | } | |
c41debaf | 2212 | |
0fd327bd GL |
2213 | return 0; |
2214 | } | |
2215 | ||
2216 | static struct platform_driver __refdata soc_camera_pdrv = { | |
1858c99d | 2217 | .probe = soc_camera_pdrv_probe, |
4c62e976 | 2218 | .remove = soc_camera_pdrv_remove, |
40e2e092 GL |
2219 | .driver = { |
2220 | .name = "soc-camera-pdrv", | |
0fd327bd GL |
2221 | }, |
2222 | }; | |
2223 | ||
ec0341b3 | 2224 | module_platform_driver(soc_camera_pdrv); |
e55222ef GL |
2225 | |
2226 | MODULE_DESCRIPTION("Image capture bus driver"); | |
2227 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
2228 | MODULE_LICENSE("GPL"); | |
0fd327bd | 2229 | MODULE_ALIAS("platform:soc-camera-pdrv"); |