Commit | Line | Data |
---|---|---|
e55222ef GL |
1 | /* |
2 | * camera image capture (abstract) bus driver | |
3 | * | |
4 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
5 | * | |
6 | * This driver provides an interface between platform-specific camera | |
7 | * busses and camera devices. It should be used if the camera is | |
8 | * connected not over a "proper" bus like PCI or USB, but over a | |
9 | * special bus, like, for example, the Quick Capture interface on PXA270 | |
10 | * SoCs. Later it should also be used for i.MX31 SoCs from Freescale. | |
11 | * It can handle multiple cameras and / or multiple busses, which can | |
12 | * be used, e.g., in stereo-vision applications. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | */ | |
18 | ||
e55222ef | 19 | #include <linux/device.h> |
e55222ef | 20 | #include <linux/err.h> |
0fd327bd GL |
21 | #include <linux/i2c.h> |
22 | #include <linux/init.h> | |
23 | #include <linux/list.h> | |
40e2e092 | 24 | #include <linux/module.h> |
e09da11d | 25 | #include <linux/mutex.h> |
859969b3 | 26 | #include <linux/of_graph.h> |
0fd327bd | 27 | #include <linux/platform_device.h> |
e09da11d | 28 | #include <linux/pm_runtime.h> |
96e442c1 | 29 | #include <linux/regulator/consumer.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
e55222ef GL |
31 | #include <linux/vmalloc.h> |
32 | ||
0fd327bd | 33 | #include <media/soc_camera.h> |
d647f0b7 | 34 | #include <media/drv-intf/soc_mediabus.h> |
e09da11d | 35 | #include <media/v4l2-async.h> |
9aea470b | 36 | #include <media/v4l2-clk.h> |
e55222ef | 37 | #include <media/v4l2-common.h> |
0fd327bd | 38 | #include <media/v4l2-ioctl.h> |
40e2e092 | 39 | #include <media/v4l2-dev.h> |
859969b3 | 40 | #include <media/v4l2-fwnode.h> |
c139990e | 41 | #include <media/videobuf2-v4l2.h> |
e55222ef | 42 | |
df2ed070 GL |
43 | /* Default to VGA resolution */ |
44 | #define DEFAULT_WIDTH 640 | |
45 | #define DEFAULT_HEIGHT 480 | |
46 | ||
e09da11d GL |
47 | #define MAP_MAX_NUM 32 |
48 | static DECLARE_BITMAP(device_map, MAP_MAX_NUM); | |
e55222ef GL |
49 | static LIST_HEAD(hosts); |
50 | static LIST_HEAD(devices); | |
e09da11d GL |
51 | /* |
52 | * Protects lists and bitmaps of hosts and devices. | |
53 | * Lock nesting: Ok to take ->host_lock under list_lock. | |
54 | */ | |
55 | static DEFINE_MUTEX(list_lock); | |
56 | ||
57 | struct soc_camera_async_client { | |
58 | struct v4l2_async_subdev *sensor; | |
59 | struct v4l2_async_notifier notifier; | |
60 | struct platform_device *pdev; | |
61 | struct list_head list; /* needed for clean up */ | |
62 | }; | |
63 | ||
64 | static int soc_camera_video_start(struct soc_camera_device *icd); | |
65 | static int video_dev_create(struct soc_camera_device *icd); | |
e55222ef | 66 | |
9aea470b GL |
67 | int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd, |
68 | struct v4l2_clk *clk) | |
96e442c1 | 69 | { |
40f07533 GL |
70 | int ret; |
71 | bool clock_toggle; | |
72 | ||
73 | if (clk && (!ssdd->unbalanced_power || | |
74 | !test_and_set_bit(0, &ssdd->clock_state))) { | |
75 | ret = v4l2_clk_enable(clk); | |
76 | if (ret < 0) { | |
77 | dev_err(dev, "Cannot enable clock: %d\n", ret); | |
78 | return ret; | |
79 | } | |
80 | clock_toggle = true; | |
81 | } else { | |
82 | clock_toggle = false; | |
9aea470b | 83 | } |
40f07533 | 84 | |
d3f884a7 GL |
85 | ret = regulator_bulk_enable(ssdd->sd_pdata.num_regulators, |
86 | ssdd->sd_pdata.regulators); | |
3dcc731a | 87 | if (ret < 0) { |
4ec10bac | 88 | dev_err(dev, "Cannot enable regulators\n"); |
e09da11d | 89 | goto eregenable; |
3dcc731a | 90 | } |
96e442c1 | 91 | |
25a34811 GL |
92 | if (ssdd->power) { |
93 | ret = ssdd->power(dev, 1); | |
96e442c1 | 94 | if (ret < 0) { |
4ec10bac | 95 | dev_err(dev, |
96e442c1 | 96 | "Platform failed to power-on the camera.\n"); |
9aea470b | 97 | goto epwron; |
96e442c1 | 98 | } |
3dcc731a GL |
99 | } |
100 | ||
9aea470b GL |
101 | return 0; |
102 | ||
103 | epwron: | |
d3f884a7 GL |
104 | regulator_bulk_disable(ssdd->sd_pdata.num_regulators, |
105 | ssdd->sd_pdata.regulators); | |
9aea470b | 106 | eregenable: |
40f07533 | 107 | if (clock_toggle) |
9aea470b GL |
108 | v4l2_clk_disable(clk); |
109 | ||
3dcc731a GL |
110 | return ret; |
111 | } | |
4ec10bac | 112 | EXPORT_SYMBOL(soc_camera_power_on); |
3dcc731a | 113 | |
9aea470b GL |
114 | int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd, |
115 | struct v4l2_clk *clk) | |
3dcc731a | 116 | { |
24592adc LP |
117 | int ret = 0; |
118 | int err; | |
7b9d8c3c | 119 | |
25a34811 GL |
120 | if (ssdd->power) { |
121 | err = ssdd->power(dev, 0); | |
24592adc | 122 | if (err < 0) { |
4ec10bac | 123 | dev_err(dev, |
96e442c1 | 124 | "Platform failed to power-off the camera.\n"); |
4ec10bac | 125 | ret = err; |
96e442c1 | 126 | } |
96e442c1 AP |
127 | } |
128 | ||
d3f884a7 GL |
129 | err = regulator_bulk_disable(ssdd->sd_pdata.num_regulators, |
130 | ssdd->sd_pdata.regulators); | |
24592adc | 131 | if (err < 0) { |
4ec10bac | 132 | dev_err(dev, "Cannot disable regulators\n"); |
24592adc LP |
133 | ret = ret ? : err; |
134 | } | |
3dcc731a | 135 | |
40f07533 | 136 | if (clk && (!ssdd->unbalanced_power || test_and_clear_bit(0, &ssdd->clock_state))) |
9aea470b GL |
137 | v4l2_clk_disable(clk); |
138 | ||
3dcc731a | 139 | return ret; |
96e442c1 | 140 | } |
4ec10bac LP |
141 | EXPORT_SYMBOL(soc_camera_power_off); |
142 | ||
e09da11d GL |
143 | int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd) |
144 | { | |
23272427 | 145 | /* Should not have any effect in synchronous case */ |
d3f884a7 GL |
146 | return devm_regulator_bulk_get(dev, ssdd->sd_pdata.num_regulators, |
147 | ssdd->sd_pdata.regulators); | |
e09da11d GL |
148 | } |
149 | EXPORT_SYMBOL(soc_camera_power_init); | |
150 | ||
4ec10bac LP |
151 | static int __soc_camera_power_on(struct soc_camera_device *icd) |
152 | { | |
153 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
154 | int ret; | |
155 | ||
156 | ret = v4l2_subdev_call(sd, core, s_power, 1); | |
157 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) | |
158 | return ret; | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static int __soc_camera_power_off(struct soc_camera_device *icd) | |
164 | { | |
165 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
166 | int ret; | |
167 | ||
168 | ret = v4l2_subdev_call(sd, core, s_power, 0); | |
169 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) | |
170 | return ret; | |
171 | ||
172 | return 0; | |
173 | } | |
96e442c1 | 174 | |
3781760a LP |
175 | static int soc_camera_clock_start(struct soc_camera_host *ici) |
176 | { | |
177 | int ret; | |
178 | ||
179 | if (!ici->ops->clock_start) | |
180 | return 0; | |
181 | ||
182 | mutex_lock(&ici->clk_lock); | |
183 | ret = ici->ops->clock_start(ici); | |
184 | mutex_unlock(&ici->clk_lock); | |
185 | ||
186 | return ret; | |
187 | } | |
188 | ||
189 | static void soc_camera_clock_stop(struct soc_camera_host *ici) | |
190 | { | |
191 | if (!ici->ops->clock_stop) | |
192 | return; | |
193 | ||
194 | mutex_lock(&ici->clk_lock); | |
195 | ici->ops->clock_stop(ici); | |
196 | mutex_unlock(&ici->clk_lock); | |
197 | } | |
198 | ||
c2786ad2 GL |
199 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
200 | struct soc_camera_device *icd, unsigned int fourcc) | |
201 | { | |
202 | unsigned int i; | |
203 | ||
204 | for (i = 0; i < icd->num_user_formats; i++) | |
205 | if (icd->user_formats[i].host_fmt->fourcc == fourcc) | |
206 | return icd->user_formats + i; | |
207 | return NULL; | |
208 | } | |
209 | EXPORT_SYMBOL(soc_camera_xlate_by_fourcc); | |
210 | ||
32c69fcc GL |
211 | /** |
212 | * soc_camera_apply_board_flags() - apply platform SOCAM_SENSOR_INVERT_* flags | |
25a34811 | 213 | * @ssdd: camera platform parameters |
32c69fcc GL |
214 | * @cfg: media bus configuration |
215 | * @return: resulting flags | |
216 | */ | |
25a34811 | 217 | unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd, |
32c69fcc GL |
218 | const struct v4l2_mbus_config *cfg) |
219 | { | |
220 | unsigned long f, flags = cfg->flags; | |
221 | ||
222 | /* If only one of the two polarities is supported, switch to the opposite */ | |
25a34811 | 223 | if (ssdd->flags & SOCAM_SENSOR_INVERT_HSYNC) { |
32c69fcc GL |
224 | f = flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW); |
225 | if (f == V4L2_MBUS_HSYNC_ACTIVE_HIGH || f == V4L2_MBUS_HSYNC_ACTIVE_LOW) | |
226 | flags ^= V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW; | |
227 | } | |
228 | ||
25a34811 | 229 | if (ssdd->flags & SOCAM_SENSOR_INVERT_VSYNC) { |
32c69fcc GL |
230 | f = flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW); |
231 | if (f == V4L2_MBUS_VSYNC_ACTIVE_HIGH || f == V4L2_MBUS_VSYNC_ACTIVE_LOW) | |
232 | flags ^= V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW; | |
233 | } | |
234 | ||
25a34811 | 235 | if (ssdd->flags & SOCAM_SENSOR_INVERT_PCLK) { |
32c69fcc GL |
236 | f = flags & (V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING); |
237 | if (f == V4L2_MBUS_PCLK_SAMPLE_RISING || f == V4L2_MBUS_PCLK_SAMPLE_FALLING) | |
238 | flags ^= V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING; | |
239 | } | |
240 | ||
241 | return flags; | |
242 | } | |
243 | EXPORT_SYMBOL(soc_camera_apply_board_flags); | |
244 | ||
dca6b6d1 SA |
245 | #define pixfmtstr(x) (x) & 0xff, ((x) >> 8) & 0xff, ((x) >> 16) & 0xff, \ |
246 | ((x) >> 24) & 0xff | |
247 | ||
248 | static int soc_camera_try_fmt(struct soc_camera_device *icd, | |
249 | struct v4l2_format *f) | |
250 | { | |
7dfff953 | 251 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
bed8d803 | 252 | const struct soc_camera_format_xlate *xlate; |
dca6b6d1 SA |
253 | struct v4l2_pix_format *pix = &f->fmt.pix; |
254 | int ret; | |
255 | ||
7dfff953 | 256 | dev_dbg(icd->pdev, "TRY_FMT(%c%c%c%c, %ux%u)\n", |
dca6b6d1 SA |
257 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
258 | ||
a70a6c43 AW |
259 | if (pix->pixelformat != V4L2_PIX_FMT_JPEG && |
260 | !(ici->capabilities & SOCAM_HOST_CAP_STRIDE)) { | |
914f05c8 LP |
261 | pix->bytesperline = 0; |
262 | pix->sizeimage = 0; | |
263 | } | |
dca6b6d1 SA |
264 | |
265 | ret = ici->ops->try_fmt(icd, f); | |
266 | if (ret < 0) | |
267 | return ret; | |
268 | ||
bed8d803 LP |
269 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
270 | if (!xlate) | |
271 | return -EINVAL; | |
dca6b6d1 | 272 | |
bed8d803 LP |
273 | ret = soc_mbus_bytes_per_line(pix->width, xlate->host_fmt); |
274 | if (ret < 0) | |
275 | return ret; | |
dca6b6d1 | 276 | |
bed8d803 LP |
277 | pix->bytesperline = max_t(u32, pix->bytesperline, ret); |
278 | ||
279 | ret = soc_mbus_image_size(xlate->host_fmt, pix->bytesperline, | |
280 | pix->height); | |
281 | if (ret < 0) | |
282 | return ret; | |
283 | ||
284 | pix->sizeimage = max_t(u32, pix->sizeimage, ret); | |
dca6b6d1 SA |
285 | |
286 | return 0; | |
287 | } | |
288 | ||
72937890 | 289 | static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 290 | struct v4l2_format *f) |
e55222ef | 291 | { |
57bee29d | 292 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
293 | |
294 | WARN_ON(priv != file->private_data); | |
295 | ||
d366d4a0 GL |
296 | /* Only single-plane capture is supported so far */ |
297 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
298 | return -EINVAL; | |
299 | ||
ad5f2e85 | 300 | /* limit format to hardware capabilities */ |
dca6b6d1 | 301 | return soc_camera_try_fmt(icd, f); |
e55222ef GL |
302 | } |
303 | ||
304 | static int soc_camera_enum_input(struct file *file, void *priv, | |
305 | struct v4l2_input *inp) | |
306 | { | |
d53c0f72 HV |
307 | struct soc_camera_device *icd = file->private_data; |
308 | ||
e55222ef GL |
309 | if (inp->index != 0) |
310 | return -EINVAL; | |
311 | ||
8318a64b GL |
312 | /* default is camera */ |
313 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
d53c0f72 | 314 | inp->std = icd->vdev->tvnorms; |
8318a64b | 315 | strcpy(inp->name, "Camera"); |
e55222ef | 316 | |
8318a64b | 317 | return 0; |
e55222ef GL |
318 | } |
319 | ||
320 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
321 | { | |
322 | *i = 0; | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
328 | { | |
329 | if (i > 0) | |
330 | return -EINVAL; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
314527ac | 335 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id a) |
e55222ef | 336 | { |
57bee29d | 337 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 338 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
513791ab | 339 | |
8774bed9 | 340 | return v4l2_subdev_call(sd, video, s_std, a); |
e55222ef GL |
341 | } |
342 | ||
2f0babb7 GL |
343 | static int soc_camera_g_std(struct file *file, void *priv, v4l2_std_id *a) |
344 | { | |
345 | struct soc_camera_device *icd = file->private_data; | |
346 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
347 | ||
8774bed9 | 348 | return v4l2_subdev_call(sd, video, g_std, a); |
2f0babb7 GL |
349 | } |
350 | ||
ad3537b5 | 351 | static int soc_camera_enum_framesizes(struct file *file, void *fh, |
ed5b65dc QX |
352 | struct v4l2_frmsizeenum *fsize) |
353 | { | |
354 | struct soc_camera_device *icd = file->private_data; | |
7dfff953 | 355 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
ed5b65dc | 356 | |
ad3537b5 | 357 | return ici->ops->enum_framesizes(icd, fsize); |
ed5b65dc QX |
358 | } |
359 | ||
e55222ef GL |
360 | static int soc_camera_reqbufs(struct file *file, void *priv, |
361 | struct v4l2_requestbuffers *p) | |
362 | { | |
363 | int ret; | |
57bee29d | 364 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
365 | |
366 | WARN_ON(priv != file->private_data); | |
367 | ||
57bee29d GL |
368 | if (icd->streamer && icd->streamer != file) |
369 | return -EBUSY; | |
370 | ||
73a01599 | 371 | ret = vb2_reqbufs(&icd->vb2_vidq, p); |
9f317de4 HV |
372 | if (!ret) |
373 | icd->streamer = p->count ? file : NULL; | |
57bee29d | 374 | return ret; |
e55222ef GL |
375 | } |
376 | ||
377 | static int soc_camera_querybuf(struct file *file, void *priv, | |
378 | struct v4l2_buffer *p) | |
379 | { | |
57bee29d | 380 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
381 | |
382 | WARN_ON(priv != file->private_data); | |
383 | ||
73a01599 | 384 | return vb2_querybuf(&icd->vb2_vidq, p); |
e55222ef GL |
385 | } |
386 | ||
387 | static int soc_camera_qbuf(struct file *file, void *priv, | |
388 | struct v4l2_buffer *p) | |
389 | { | |
57bee29d | 390 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
391 | |
392 | WARN_ON(priv != file->private_data); | |
393 | ||
57bee29d GL |
394 | if (icd->streamer != file) |
395 | return -EBUSY; | |
396 | ||
73a01599 | 397 | return vb2_qbuf(&icd->vb2_vidq, p); |
e55222ef GL |
398 | } |
399 | ||
400 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
401 | struct v4l2_buffer *p) | |
402 | { | |
57bee29d | 403 | struct soc_camera_device *icd = file->private_data; |
e55222ef GL |
404 | |
405 | WARN_ON(priv != file->private_data); | |
406 | ||
57bee29d GL |
407 | if (icd->streamer != file) |
408 | return -EBUSY; | |
409 | ||
73a01599 | 410 | return vb2_dqbuf(&icd->vb2_vidq, p, file->f_flags & O_NONBLOCK); |
e55222ef GL |
411 | } |
412 | ||
7ae77ee9 GL |
413 | static int soc_camera_create_bufs(struct file *file, void *priv, |
414 | struct v4l2_create_buffers *create) | |
415 | { | |
416 | struct soc_camera_device *icd = file->private_data; | |
9f317de4 | 417 | int ret; |
7ae77ee9 | 418 | |
9f317de4 HV |
419 | if (icd->streamer && icd->streamer != file) |
420 | return -EBUSY; | |
421 | ||
422 | ret = vb2_create_bufs(&icd->vb2_vidq, create); | |
423 | if (!ret) | |
424 | icd->streamer = file; | |
425 | return ret; | |
7ae77ee9 GL |
426 | } |
427 | ||
428 | static int soc_camera_prepare_buf(struct file *file, void *priv, | |
429 | struct v4l2_buffer *b) | |
430 | { | |
431 | struct soc_camera_device *icd = file->private_data; | |
7ae77ee9 | 432 | |
73a01599 | 433 | return vb2_prepare_buf(&icd->vb2_vidq, b); |
7ae77ee9 GL |
434 | } |
435 | ||
c710f591 KK |
436 | static int soc_camera_expbuf(struct file *file, void *priv, |
437 | struct v4l2_exportbuffer *p) | |
438 | { | |
439 | struct soc_camera_device *icd = file->private_data; | |
eb01b1bc HV |
440 | |
441 | if (icd->streamer && icd->streamer != file) | |
442 | return -EBUSY; | |
443 | return vb2_expbuf(&icd->vb2_vidq, p); | |
c710f591 KK |
444 | } |
445 | ||
dd669e90 | 446 | /* Always entered with .host_lock held */ |
c2786ad2 GL |
447 | static int soc_camera_init_user_formats(struct soc_camera_device *icd) |
448 | { | |
760697be | 449 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
7dfff953 | 450 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
3805f201 HV |
451 | unsigned int i, fmts = 0, raw_fmts = 0; |
452 | int ret; | |
ebcff5fc HV |
453 | struct v4l2_subdev_mbus_code_enum code = { |
454 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, | |
455 | }; | |
760697be | 456 | |
ebcff5fc | 457 | while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) { |
760697be | 458 | raw_fmts++; |
ebcff5fc HV |
459 | code.index++; |
460 | } | |
c2786ad2 GL |
461 | |
462 | if (!ici->ops->get_formats) | |
463 | /* | |
464 | * Fallback mode - the host will have to serve all | |
465 | * sensor-provided formats one-to-one to the user | |
466 | */ | |
760697be | 467 | fmts = raw_fmts; |
c2786ad2 GL |
468 | else |
469 | /* | |
470 | * First pass - only count formats this host-sensor | |
471 | * configuration can provide | |
472 | */ | |
760697be | 473 | for (i = 0; i < raw_fmts; i++) { |
fa48984e GL |
474 | ret = ici->ops->get_formats(icd, i, NULL); |
475 | if (ret < 0) | |
476 | return ret; | |
477 | fmts += ret; | |
478 | } | |
c2786ad2 GL |
479 | |
480 | if (!fmts) | |
481 | return -ENXIO; | |
482 | ||
483 | icd->user_formats = | |
42bc47b3 KC |
484 | vmalloc(array_size(fmts, |
485 | sizeof(struct soc_camera_format_xlate))); | |
c2786ad2 GL |
486 | if (!icd->user_formats) |
487 | return -ENOMEM; | |
488 | ||
7dfff953 | 489 | dev_dbg(icd->pdev, "Found %d supported formats.\n", fmts); |
c2786ad2 GL |
490 | |
491 | /* Second pass - actually fill data formats */ | |
14df2cce | 492 | fmts = 0; |
760697be | 493 | for (i = 0; i < raw_fmts; i++) |
c2786ad2 | 494 | if (!ici->ops->get_formats) { |
ebcff5fc HV |
495 | code.index = i; |
496 | v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code); | |
d2dcad49 | 497 | icd->user_formats[fmts].host_fmt = |
ebcff5fc | 498 | soc_mbus_get_fmtdesc(code.code); |
d2dcad49 | 499 | if (icd->user_formats[fmts].host_fmt) |
ebcff5fc | 500 | icd->user_formats[fmts++].code = code.code; |
c2786ad2 | 501 | } else { |
fa48984e GL |
502 | ret = ici->ops->get_formats(icd, i, |
503 | &icd->user_formats[fmts]); | |
504 | if (ret < 0) | |
505 | goto egfmt; | |
506 | fmts += ret; | |
c2786ad2 GL |
507 | } |
508 | ||
d2dcad49 | 509 | icd->num_user_formats = fmts; |
760697be | 510 | icd->current_fmt = &icd->user_formats[0]; |
c2786ad2 GL |
511 | |
512 | return 0; | |
fa48984e GL |
513 | |
514 | egfmt: | |
fa48984e GL |
515 | vfree(icd->user_formats); |
516 | return ret; | |
c2786ad2 GL |
517 | } |
518 | ||
dd669e90 | 519 | /* Always entered with .host_lock held */ |
c2786ad2 GL |
520 | static void soc_camera_free_user_formats(struct soc_camera_device *icd) |
521 | { | |
7dfff953 | 522 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
fa48984e GL |
523 | |
524 | if (ici->ops->put_formats) | |
525 | ici->ops->put_formats(icd); | |
40e2e092 | 526 | icd->current_fmt = NULL; |
fa48984e | 527 | icd->num_user_formats = 0; |
c2786ad2 | 528 | vfree(icd->user_formats); |
40e2e092 | 529 | icd->user_formats = NULL; |
c2786ad2 GL |
530 | } |
531 | ||
760697be | 532 | /* Called with .vb_lock held, or from the first open(2), see comment there */ |
57bee29d | 533 | static int soc_camera_set_fmt(struct soc_camera_device *icd, |
df2ed070 GL |
534 | struct v4l2_format *f) |
535 | { | |
7dfff953 | 536 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
df2ed070 GL |
537 | struct v4l2_pix_format *pix = &f->fmt.pix; |
538 | int ret; | |
539 | ||
7dfff953 | 540 | dev_dbg(icd->pdev, "S_FMT(%c%c%c%c, %ux%u)\n", |
6a6c8786 GL |
541 | pixfmtstr(pix->pixelformat), pix->width, pix->height); |
542 | ||
10d5509c | 543 | /* We always call try_fmt() before set_fmt() or set_selection() */ |
dca6b6d1 | 544 | ret = soc_camera_try_fmt(icd, f); |
df2ed070 GL |
545 | if (ret < 0) |
546 | return ret; | |
547 | ||
548 | ret = ici->ops->set_fmt(icd, f); | |
549 | if (ret < 0) { | |
550 | return ret; | |
551 | } else if (!icd->current_fmt || | |
760697be | 552 | icd->current_fmt->host_fmt->fourcc != pix->pixelformat) { |
7dfff953 | 553 | dev_err(icd->pdev, |
df2ed070 GL |
554 | "Host driver hasn't set up current format correctly!\n"); |
555 | return -EINVAL; | |
556 | } | |
557 | ||
6a6c8786 GL |
558 | icd->user_width = pix->width; |
559 | icd->user_height = pix->height; | |
0e4c180d SA |
560 | icd->bytesperline = pix->bytesperline; |
561 | icd->sizeimage = pix->sizeimage; | |
760697be | 562 | icd->colorspace = pix->colorspace; |
592c2aba | 563 | icd->field = pix->field; |
025c18a1 | 564 | |
7dfff953 | 565 | dev_dbg(icd->pdev, "set width: %d height: %d\n", |
6a6c8786 | 566 | icd->user_width, icd->user_height); |
df2ed070 GL |
567 | |
568 | /* set physical bus parameters */ | |
8843d119 | 569 | return ici->ops->set_bus_param(icd); |
df2ed070 GL |
570 | } |
571 | ||
f7f6ce2d GL |
572 | static int soc_camera_add_device(struct soc_camera_device *icd) |
573 | { | |
574 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
575 | int ret; | |
576 | ||
577 | if (ici->icd) | |
578 | return -EBUSY; | |
579 | ||
9aea470b | 580 | if (!icd->clk) { |
3781760a | 581 | ret = soc_camera_clock_start(ici); |
9aea470b GL |
582 | if (ret < 0) |
583 | return ret; | |
584 | } | |
a78fcc11 GL |
585 | |
586 | if (ici->ops->add) { | |
587 | ret = ici->ops->add(icd); | |
eb569cf9 | 588 | if (ret < 0) |
a78fcc11 | 589 | goto eadd; |
eb569cf9 GL |
590 | } |
591 | ||
eb569cf9 GL |
592 | ici->icd = icd; |
593 | ||
594 | return 0; | |
f7f6ce2d | 595 | |
eb569cf9 | 596 | eadd: |
3781760a LP |
597 | if (!icd->clk) |
598 | soc_camera_clock_stop(ici); | |
f7f6ce2d GL |
599 | return ret; |
600 | } | |
601 | ||
602 | static void soc_camera_remove_device(struct soc_camera_device *icd) | |
603 | { | |
604 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
605 | ||
606 | if (WARN_ON(icd != ici->icd)) | |
607 | return; | |
608 | ||
a78fcc11 GL |
609 | if (ici->ops->remove) |
610 | ici->ops->remove(icd); | |
3781760a LP |
611 | if (!icd->clk) |
612 | soc_camera_clock_stop(ici); | |
f7f6ce2d GL |
613 | ici->icd = NULL; |
614 | } | |
615 | ||
bec43661 | 616 | static int soc_camera_open(struct file *file) |
e55222ef | 617 | { |
979ea1dd | 618 | struct video_device *vdev = video_devdata(file); |
2400a1f8 | 619 | struct soc_camera_device *icd; |
9dc4e48f | 620 | struct soc_camera_host *ici; |
e55222ef GL |
621 | int ret; |
622 | ||
7d051b35 GL |
623 | /* |
624 | * Don't mess with the host during probe: wait until the loop in | |
2400a1f8 GL |
625 | * scan_add_host() completes. Also protect against a race with |
626 | * soc_camera_host_unregister(). | |
7d051b35 GL |
627 | */ |
628 | if (mutex_lock_interruptible(&list_lock)) | |
629 | return -ERESTARTSYS; | |
2400a1f8 GL |
630 | |
631 | if (!vdev || !video_is_registered(vdev)) { | |
632 | mutex_unlock(&list_lock); | |
633 | return -ENODEV; | |
634 | } | |
635 | ||
14381c26 | 636 | icd = video_get_drvdata(vdev); |
7dfff953 | 637 | ici = to_soc_camera_host(icd->parent); |
2400a1f8 GL |
638 | |
639 | ret = try_module_get(ici->ops->owner) ? 0 : -ENODEV; | |
7d051b35 | 640 | mutex_unlock(&list_lock); |
e55222ef | 641 | |
2400a1f8 | 642 | if (ret < 0) { |
7dfff953 | 643 | dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); |
2400a1f8 GL |
644 | return ret; |
645 | } | |
646 | ||
647 | if (!to_soc_camera_control(icd)) { | |
648 | /* No device driver attached */ | |
649 | ret = -ENODEV; | |
650 | goto econtrol; | |
e55222ef GL |
651 | } |
652 | ||
2400a1f8 GL |
653 | if (mutex_lock_interruptible(&ici->host_lock)) { |
654 | ret = -ERESTARTSYS; | |
655 | goto elockhost; | |
656 | } | |
1a0063a9 GL |
657 | icd->use_count++; |
658 | ||
9dc4e48f GL |
659 | /* Now we really have to activate the camera */ |
660 | if (icd->use_count == 1) { | |
2400a1f8 | 661 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
025c18a1 | 662 | /* Restore parameters before the last close() per V4L2 API */ |
df2ed070 GL |
663 | struct v4l2_format f = { |
664 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
665 | .fmt.pix = { | |
6a6c8786 GL |
666 | .width = icd->user_width, |
667 | .height = icd->user_height, | |
025c18a1 | 668 | .field = icd->field, |
760697be GL |
669 | .colorspace = icd->colorspace, |
670 | .pixelformat = | |
671 | icd->current_fmt->host_fmt->fourcc, | |
df2ed070 GL |
672 | }, |
673 | }; | |
674 | ||
979ea1dd | 675 | /* The camera could have been already on, try to reset */ |
25a34811 | 676 | if (sdesc->subdev_desc.reset) |
0b9508aa JW |
677 | if (icd->control) |
678 | sdesc->subdev_desc.reset(icd->control); | |
979ea1dd | 679 | |
f7f6ce2d | 680 | ret = soc_camera_add_device(icd); |
9dc4e48f | 681 | if (ret < 0) { |
7dfff953 | 682 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); |
9dc4e48f GL |
683 | goto eiciadd; |
684 | } | |
df2ed070 | 685 | |
4ec10bac | 686 | ret = __soc_camera_power_on(icd); |
7705b6d8 GL |
687 | if (ret < 0) |
688 | goto epower; | |
689 | ||
4f9fb5ed MCC |
690 | pm_runtime_enable(&icd->vdev->dev); |
691 | ret = pm_runtime_resume(&icd->vdev->dev); | |
692 | if (ret < 0 && ret != -ENOSYS) | |
693 | goto eresume; | |
694 | ||
760697be GL |
695 | /* |
696 | * Try to configure with default parameters. Notice: this is the | |
697 | * very first open, so, we cannot race against other calls, | |
698 | * apart from someone else calling open() simultaneously, but | |
dd669e90 | 699 | * .host_lock is protecting us against it. |
760697be | 700 | */ |
57bee29d | 701 | ret = soc_camera_set_fmt(icd, &f); |
df2ed070 GL |
702 | if (ret < 0) |
703 | goto esfmt; | |
24d8c029 | 704 | |
73a01599 LP |
705 | ret = ici->ops->init_videobuf2(&icd->vb2_vidq, icd); |
706 | if (ret < 0) | |
707 | goto einitvb; | |
ee02da64 | 708 | v4l2_ctrl_handler_setup(&icd->ctrl_handler); |
9dc4e48f | 709 | } |
dd669e90 | 710 | mutex_unlock(&ici->host_lock); |
9dc4e48f | 711 | |
57bee29d | 712 | file->private_data = icd; |
7dfff953 | 713 | dev_dbg(icd->pdev, "camera device open\n"); |
e55222ef | 714 | |
e55222ef GL |
715 | return 0; |
716 | ||
df2ed070 | 717 | /* |
e09da11d GL |
718 | * All errors are entered with the .host_lock held, first four also |
719 | * with use_count == 1 | |
df2ed070 | 720 | */ |
592c2aba | 721 | einitvb: |
df2ed070 | 722 | esfmt: |
4f9fb5ed MCC |
723 | pm_runtime_disable(&icd->vdev->dev); |
724 | eresume: | |
4ec10bac | 725 | __soc_camera_power_off(icd); |
979ea1dd | 726 | epower: |
f7f6ce2d | 727 | soc_camera_remove_device(icd); |
7705b6d8 | 728 | eiciadd: |
c2786ad2 | 729 | icd->use_count--; |
dd669e90 | 730 | mutex_unlock(&ici->host_lock); |
2400a1f8 GL |
731 | elockhost: |
732 | econtrol: | |
733 | module_put(ici->ops->owner); | |
57bee29d | 734 | |
e55222ef GL |
735 | return ret; |
736 | } | |
737 | ||
bec43661 | 738 | static int soc_camera_close(struct file *file) |
e55222ef | 739 | { |
57bee29d | 740 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 741 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef | 742 | |
dd669e90 | 743 | mutex_lock(&ici->host_lock); |
16225ea7 HV |
744 | if (icd->streamer == file) { |
745 | if (ici->ops->init_videobuf2) | |
746 | vb2_queue_release(&icd->vb2_vidq); | |
747 | icd->streamer = NULL; | |
748 | } | |
9dc4e48f | 749 | icd->use_count--; |
40e2e092 | 750 | if (!icd->use_count) { |
4f9fb5ed MCC |
751 | pm_runtime_suspend(&icd->vdev->dev); |
752 | pm_runtime_disable(&icd->vdev->dev); | |
753 | ||
4ec10bac | 754 | __soc_camera_power_off(icd); |
af44ad5e | 755 | |
f7f6ce2d | 756 | soc_camera_remove_device(icd); |
40e2e092 | 757 | } |
025c18a1 | 758 | |
dd669e90 | 759 | mutex_unlock(&ici->host_lock); |
57bee29d | 760 | |
b8d9904c | 761 | module_put(ici->ops->owner); |
9dc4e48f | 762 | |
7dfff953 | 763 | dev_dbg(icd->pdev, "camera device close\n"); |
e55222ef GL |
764 | |
765 | return 0; | |
766 | } | |
767 | ||
aba360d8 | 768 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
abe4c471 | 769 | size_t count, loff_t *ppos) |
e55222ef | 770 | { |
57bee29d | 771 | struct soc_camera_device *icd = file->private_data; |
1438be56 AG |
772 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
773 | ||
774 | dev_dbg(icd->pdev, "read called, buf %p\n", buf); | |
775 | ||
776 | if (ici->ops->init_videobuf2 && icd->vb2_vidq.io_modes & VB2_READ) | |
777 | return vb2_read(&icd->vb2_vidq, buf, count, ppos, | |
778 | file->f_flags & O_NONBLOCK); | |
e55222ef | 779 | |
7dfff953 | 780 | dev_err(icd->pdev, "camera device read not implemented\n"); |
e55222ef | 781 | |
1438be56 | 782 | return -EINVAL; |
e55222ef GL |
783 | } |
784 | ||
785 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
786 | { | |
57bee29d | 787 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 788 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
789 | int err; |
790 | ||
42eb523f | 791 | dev_dbg(icd->pdev, "mmap called, vma=%p\n", vma); |
e55222ef | 792 | |
57bee29d GL |
793 | if (icd->streamer != file) |
794 | return -EBUSY; | |
795 | ||
dd669e90 | 796 | if (mutex_lock_interruptible(&ici->host_lock)) |
8422b087 | 797 | return -ERESTARTSYS; |
73a01599 | 798 | err = vb2_mmap(&icd->vb2_vidq, vma); |
dd669e90 | 799 | mutex_unlock(&ici->host_lock); |
e55222ef | 800 | |
7dfff953 | 801 | dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", |
e55222ef GL |
802 | (unsigned long)vma->vm_start, |
803 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
804 | err); | |
805 | ||
806 | return err; | |
807 | } | |
808 | ||
c23e0cb8 | 809 | static __poll_t soc_camera_poll(struct file *file, poll_table *pt) |
e55222ef | 810 | { |
57bee29d | 811 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 812 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
a9a08845 | 813 | __poll_t res = EPOLLERR; |
e55222ef | 814 | |
57bee29d | 815 | if (icd->streamer != file) |
a9a08845 | 816 | return EPOLLERR; |
e55222ef | 817 | |
dd669e90 | 818 | mutex_lock(&ici->host_lock); |
73a01599 | 819 | res = ici->ops->poll(file, pt); |
dd669e90 | 820 | mutex_unlock(&ici->host_lock); |
8422b087 | 821 | return res; |
e55222ef GL |
822 | } |
823 | ||
6bcc0516 | 824 | static const struct v4l2_file_operations soc_camera_fops = { |
e55222ef GL |
825 | .owner = THIS_MODULE, |
826 | .open = soc_camera_open, | |
827 | .release = soc_camera_close, | |
b6a633c1 | 828 | .unlocked_ioctl = video_ioctl2, |
e55222ef GL |
829 | .read = soc_camera_read, |
830 | .mmap = soc_camera_mmap, | |
831 | .poll = soc_camera_poll, | |
e55222ef GL |
832 | }; |
833 | ||
72937890 | 834 | static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 835 | struct v4l2_format *f) |
e55222ef | 836 | { |
57bee29d | 837 | struct soc_camera_device *icd = file->private_data; |
e55222ef | 838 | int ret; |
e55222ef GL |
839 | |
840 | WARN_ON(priv != file->private_data); | |
841 | ||
d366d4a0 | 842 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
7dfff953 | 843 | dev_warn(icd->pdev, "Wrong buf-type %d\n", f->type); |
d366d4a0 GL |
844 | return -EINVAL; |
845 | } | |
846 | ||
57bee29d GL |
847 | if (icd->streamer && icd->streamer != file) |
848 | return -EBUSY; | |
1c3bb743 | 849 | |
73a01599 | 850 | if (vb2_is_streaming(&icd->vb2_vidq)) { |
7dfff953 | 851 | dev_err(icd->pdev, "S_FMT denied: queue initialised\n"); |
b6a633c1 | 852 | return -EBUSY; |
1c3bb743 GL |
853 | } |
854 | ||
57bee29d GL |
855 | ret = soc_camera_set_fmt(icd, f); |
856 | ||
857 | if (!ret && !icd->streamer) | |
858 | icd->streamer = file; | |
1c3bb743 | 859 | |
1c3bb743 | 860 | return ret; |
e55222ef GL |
861 | } |
862 | ||
72937890 | 863 | static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 864 | struct v4l2_fmtdesc *f) |
e55222ef | 865 | { |
57bee29d | 866 | struct soc_camera_device *icd = file->private_data; |
760697be | 867 | const struct soc_mbus_pixelfmt *format; |
e55222ef GL |
868 | |
869 | WARN_ON(priv != file->private_data); | |
870 | ||
c2786ad2 | 871 | if (f->index >= icd->num_user_formats) |
e55222ef GL |
872 | return -EINVAL; |
873 | ||
c2786ad2 | 874 | format = icd->user_formats[f->index].host_fmt; |
e55222ef | 875 | |
760697be GL |
876 | if (format->name) |
877 | strlcpy(f->description, format->name, sizeof(f->description)); | |
e55222ef GL |
878 | f->pixelformat = format->fourcc; |
879 | return 0; | |
880 | } | |
881 | ||
72937890 | 882 | static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv, |
abe4c471 | 883 | struct v4l2_format *f) |
e55222ef | 884 | { |
57bee29d | 885 | struct soc_camera_device *icd = file->private_data; |
64f5905e | 886 | struct v4l2_pix_format *pix = &f->fmt.pix; |
e55222ef GL |
887 | |
888 | WARN_ON(priv != file->private_data); | |
889 | ||
d366d4a0 GL |
890 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
891 | return -EINVAL; | |
892 | ||
6a6c8786 GL |
893 | pix->width = icd->user_width; |
894 | pix->height = icd->user_height; | |
0e4c180d SA |
895 | pix->bytesperline = icd->bytesperline; |
896 | pix->sizeimage = icd->sizeimage; | |
592c2aba | 897 | pix->field = icd->field; |
760697be | 898 | pix->pixelformat = icd->current_fmt->host_fmt->fourcc; |
760697be | 899 | pix->colorspace = icd->colorspace; |
7dfff953 | 900 | dev_dbg(icd->pdev, "current_fmt->fourcc: 0x%08x\n", |
760697be | 901 | icd->current_fmt->host_fmt->fourcc); |
e55222ef GL |
902 | return 0; |
903 | } | |
904 | ||
905 | static int soc_camera_querycap(struct file *file, void *priv, | |
906 | struct v4l2_capability *cap) | |
907 | { | |
57bee29d | 908 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 909 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
e55222ef GL |
910 | |
911 | WARN_ON(priv != file->private_data); | |
912 | ||
913 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 914 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
915 | } |
916 | ||
917 | static int soc_camera_streamon(struct file *file, void *priv, | |
918 | enum v4l2_buf_type i) | |
919 | { | |
57bee29d | 920 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 921 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
1c3bb743 | 922 | int ret; |
e55222ef GL |
923 | |
924 | WARN_ON(priv != file->private_data); | |
925 | ||
e55222ef GL |
926 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
927 | return -EINVAL; | |
928 | ||
57bee29d GL |
929 | if (icd->streamer != file) |
930 | return -EBUSY; | |
931 | ||
73a01599 LP |
932 | /* This calls buf_queue from host driver's videobuf2_queue_ops */ |
933 | ret = vb2_streamon(&icd->vb2_vidq, i); | |
7fdbd85b AG |
934 | if (!ret) |
935 | v4l2_subdev_call(sd, video, s_stream, 1); | |
1c3bb743 | 936 | |
1c3bb743 | 937 | return ret; |
e55222ef GL |
938 | } |
939 | ||
940 | static int soc_camera_streamoff(struct file *file, void *priv, | |
941 | enum v4l2_buf_type i) | |
942 | { | |
57bee29d | 943 | struct soc_camera_device *icd = file->private_data; |
c9c1f1c0 | 944 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
2d703835 | 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 | ||
5d28d525 | 955 | /* |
73a01599 | 956 | * This calls buf_release from host driver's videobuf2_queue_ops for all |
5d28d525 GL |
957 | * remaining buffers. When the last buffer is freed, stop capture |
958 | */ | |
73a01599 | 959 | ret = vb2_streamoff(&icd->vb2_vidq, i); |
e55222ef | 960 | |
c9c1f1c0 | 961 | v4l2_subdev_call(sd, video, s_stream, 0); |
e55222ef | 962 | |
2d703835 | 963 | return ret; |
e55222ef GL |
964 | } |
965 | ||
3bfb4100 GL |
966 | static int soc_camera_g_selection(struct file *file, void *fh, |
967 | struct v4l2_selection *s) | |
968 | { | |
969 | struct soc_camera_device *icd = file->private_data; | |
970 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
971 | ||
972 | /* With a wrong type no need to try to fall back to cropping */ | |
973 | if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
974 | return -EINVAL; | |
975 | ||
3bfb4100 GL |
976 | return ici->ops->get_selection(icd, s); |
977 | } | |
978 | ||
979 | static int soc_camera_s_selection(struct file *file, void *fh, | |
980 | struct v4l2_selection *s) | |
981 | { | |
982 | struct soc_camera_device *icd = file->private_data; | |
983 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
984 | int ret; | |
985 | ||
986 | /* In all these cases cropping emulation will not help */ | |
987 | if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || | |
eb3c311c SN |
988 | (s->target != V4L2_SEL_TGT_COMPOSE && |
989 | s->target != V4L2_SEL_TGT_CROP)) | |
3bfb4100 GL |
990 | return -EINVAL; |
991 | ||
eb3c311c | 992 | if (s->target == V4L2_SEL_TGT_COMPOSE) { |
3bfb4100 | 993 | /* No output size change during a running capture! */ |
73a01599 | 994 | if (vb2_is_streaming(&icd->vb2_vidq) && |
3bfb4100 GL |
995 | (icd->user_width != s->r.width || |
996 | icd->user_height != s->r.height)) | |
997 | return -EBUSY; | |
998 | ||
999 | /* | |
1000 | * Only one user is allowed to change the output format, touch | |
1001 | * buffers, start / stop streaming, poll for data | |
1002 | */ | |
1003 | if (icd->streamer && icd->streamer != file) | |
1004 | return -EBUSY; | |
1005 | } | |
1006 | ||
73a01599 LP |
1007 | if (s->target == V4L2_SEL_TGT_CROP && |
1008 | vb2_is_streaming(&icd->vb2_vidq) && | |
10d5509c HV |
1009 | ici->ops->set_liveselection) |
1010 | ret = ici->ops->set_liveselection(icd, s); | |
1011 | else | |
1012 | ret = ici->ops->set_selection(icd, s); | |
3bfb4100 | 1013 | if (!ret && |
eb3c311c | 1014 | s->target == V4L2_SEL_TGT_COMPOSE) { |
3bfb4100 GL |
1015 | icd->user_width = s->r.width; |
1016 | icd->user_height = s->r.height; | |
1017 | if (!icd->streamer) | |
1018 | icd->streamer = file; | |
1019 | } | |
1020 | ||
1021 | return ret; | |
1022 | } | |
1023 | ||
c9f6ef69 GL |
1024 | static int soc_camera_g_parm(struct file *file, void *fh, |
1025 | struct v4l2_streamparm *a) | |
1026 | { | |
57bee29d | 1027 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 1028 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9f6ef69 GL |
1029 | |
1030 | if (ici->ops->get_parm) | |
1031 | return ici->ops->get_parm(icd, a); | |
1032 | ||
1033 | return -ENOIOCTLCMD; | |
1034 | } | |
1035 | ||
1036 | static int soc_camera_s_parm(struct file *file, void *fh, | |
1037 | struct v4l2_streamparm *a) | |
1038 | { | |
57bee29d | 1039 | struct soc_camera_device *icd = file->private_data; |
7dfff953 | 1040 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
c9f6ef69 GL |
1041 | |
1042 | if (ici->ops->set_parm) | |
1043 | return ici->ops->set_parm(icd, a); | |
1044 | ||
1045 | return -ENOIOCTLCMD; | |
1046 | } | |
1047 | ||
e09da11d GL |
1048 | static int soc_camera_probe(struct soc_camera_host *ici, |
1049 | struct soc_camera_device *icd); | |
7dfff953 | 1050 | |
e55222ef GL |
1051 | /* So far this function cannot fail */ |
1052 | static void scan_add_host(struct soc_camera_host *ici) | |
1053 | { | |
1054 | struct soc_camera_device *icd; | |
1055 | ||
7d051b35 | 1056 | mutex_lock(&list_lock); |
e55222ef | 1057 | |
e09da11d | 1058 | list_for_each_entry(icd, &devices, list) |
e55222ef | 1059 | if (icd->iface == ici->nr) { |
e09da11d GL |
1060 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
1061 | struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; | |
1062 | ||
1063 | /* The camera could have been already on, try to reset */ | |
1064 | if (ssdd->reset) | |
0b9508aa JW |
1065 | if (icd->control) |
1066 | ssdd->reset(icd->control); | |
e09da11d | 1067 | |
7dfff953 | 1068 | icd->parent = ici->v4l2_dev.dev; |
e09da11d GL |
1069 | |
1070 | /* Ignore errors */ | |
1071 | soc_camera_probe(ici, icd); | |
e55222ef | 1072 | } |
e55222ef | 1073 | |
7d051b35 | 1074 | mutex_unlock(&list_lock); |
e55222ef GL |
1075 | } |
1076 | ||
9aea470b GL |
1077 | /* |
1078 | * It is invalid to call v4l2_clk_enable() after a successful probing | |
1079 | * asynchronously outside of V4L2 operations, i.e. with .host_lock not held. | |
1080 | */ | |
1081 | static int soc_camera_clk_enable(struct v4l2_clk *clk) | |
1082 | { | |
1083 | struct soc_camera_device *icd = clk->priv; | |
1084 | struct soc_camera_host *ici; | |
1085 | ||
1086 | if (!icd || !icd->parent) | |
1087 | return -ENODEV; | |
1088 | ||
1089 | ici = to_soc_camera_host(icd->parent); | |
1090 | ||
1091 | if (!try_module_get(ici->ops->owner)) | |
1092 | return -ENODEV; | |
1093 | ||
1094 | /* | |
1095 | * If a different client is currently being probed, the host will tell | |
1096 | * you to go | |
1097 | */ | |
3781760a | 1098 | return soc_camera_clock_start(ici); |
9aea470b GL |
1099 | } |
1100 | ||
1101 | static void soc_camera_clk_disable(struct v4l2_clk *clk) | |
1102 | { | |
1103 | struct soc_camera_device *icd = clk->priv; | |
1104 | struct soc_camera_host *ici; | |
1105 | ||
1106 | if (!icd || !icd->parent) | |
1107 | return; | |
1108 | ||
1109 | ici = to_soc_camera_host(icd->parent); | |
1110 | ||
3781760a | 1111 | soc_camera_clock_stop(ici); |
9aea470b GL |
1112 | |
1113 | module_put(ici->ops->owner); | |
1114 | } | |
1115 | ||
1116 | /* | |
1117 | * Eventually, it would be more logical to make the respective host the clock | |
1118 | * owner, but then we would have to copy this struct for each ici. Besides, it | |
1119 | * would introduce the circular dependency problem, unless we port all client | |
1120 | * drivers to release the clock, when not in use. | |
1121 | */ | |
1122 | static const struct v4l2_clk_ops soc_camera_clk_ops = { | |
1123 | .owner = THIS_MODULE, | |
1124 | .enable = soc_camera_clk_enable, | |
1125 | .disable = soc_camera_clk_disable, | |
1126 | }; | |
1127 | ||
e09da11d GL |
1128 | static int soc_camera_dyn_pdev(struct soc_camera_desc *sdesc, |
1129 | struct soc_camera_async_client *sasc) | |
1130 | { | |
1131 | struct platform_device *pdev; | |
1132 | int ret, i; | |
1133 | ||
1134 | mutex_lock(&list_lock); | |
1135 | i = find_first_zero_bit(device_map, MAP_MAX_NUM); | |
1136 | if (i < MAP_MAX_NUM) | |
1137 | set_bit(i, device_map); | |
1138 | mutex_unlock(&list_lock); | |
1139 | if (i >= MAP_MAX_NUM) | |
1140 | return -ENOMEM; | |
1141 | ||
1142 | pdev = platform_device_alloc("soc-camera-pdrv", i); | |
1143 | if (!pdev) | |
1144 | return -ENOMEM; | |
1145 | ||
1146 | ret = platform_device_add_data(pdev, sdesc, sizeof(*sdesc)); | |
1147 | if (ret < 0) { | |
1148 | platform_device_put(pdev); | |
1149 | return ret; | |
1150 | } | |
1151 | ||
1152 | sasc->pdev = pdev; | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | static struct soc_camera_device *soc_camera_add_pdev(struct soc_camera_async_client *sasc) | |
1158 | { | |
1159 | struct platform_device *pdev = sasc->pdev; | |
1160 | int ret; | |
1161 | ||
1162 | ret = platform_device_add(pdev); | |
1163 | if (ret < 0 || !pdev->dev.driver) | |
1164 | return NULL; | |
1165 | ||
1166 | return platform_get_drvdata(pdev); | |
1167 | } | |
1168 | ||
1169 | /* Locking: called with .host_lock held */ | |
1170 | static int soc_camera_probe_finish(struct soc_camera_device *icd) | |
1171 | { | |
1172 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
da298c6d HV |
1173 | struct v4l2_subdev_format fmt = { |
1174 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, | |
1175 | }; | |
1176 | struct v4l2_mbus_framefmt *mf = &fmt.format; | |
e09da11d GL |
1177 | int ret; |
1178 | ||
1179 | sd->grp_id = soc_camera_grp_id(icd); | |
1180 | v4l2_set_subdev_hostdata(sd, icd); | |
1181 | ||
f6cc51a9 HV |
1182 | v4l2_subdev_call(sd, video, g_tvnorms, &icd->vdev->tvnorms); |
1183 | ||
e09da11d GL |
1184 | ret = v4l2_ctrl_add_handler(&icd->ctrl_handler, sd->ctrl_handler, NULL); |
1185 | if (ret < 0) | |
1186 | return ret; | |
1187 | ||
1188 | ret = soc_camera_add_device(icd); | |
1189 | if (ret < 0) { | |
1190 | dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret); | |
1191 | return ret; | |
1192 | } | |
1193 | ||
1194 | /* At this point client .probe() should have run already */ | |
1195 | ret = soc_camera_init_user_formats(icd); | |
1196 | if (ret < 0) | |
1197 | goto eusrfmt; | |
1198 | ||
1199 | icd->field = V4L2_FIELD_ANY; | |
1200 | ||
1201 | ret = soc_camera_video_start(icd); | |
1202 | if (ret < 0) | |
1203 | goto evidstart; | |
1204 | ||
1205 | /* Try to improve our guess of a reasonable window format */ | |
da298c6d HV |
1206 | if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) { |
1207 | icd->user_width = mf->width; | |
1208 | icd->user_height = mf->height; | |
1209 | icd->colorspace = mf->colorspace; | |
1210 | icd->field = mf->field; | |
e09da11d GL |
1211 | } |
1212 | soc_camera_remove_device(icd); | |
1213 | ||
1214 | return 0; | |
1215 | ||
1216 | evidstart: | |
1217 | soc_camera_free_user_formats(icd); | |
1218 | eusrfmt: | |
1219 | soc_camera_remove_device(icd); | |
1220 | ||
1221 | return ret; | |
1222 | } | |
1223 | ||
40e2e092 | 1224 | #ifdef CONFIG_I2C_BOARDINFO |
e09da11d | 1225 | static int soc_camera_i2c_init(struct soc_camera_device *icd, |
25a34811 | 1226 | struct soc_camera_desc *sdesc) |
e55222ef | 1227 | { |
23272427 | 1228 | struct soc_camera_subdev_desc *ssdd; |
40e2e092 | 1229 | struct i2c_client *client; |
e09da11d | 1230 | struct soc_camera_host *ici; |
25a34811 | 1231 | struct soc_camera_host_desc *shd = &sdesc->host_desc; |
e09da11d | 1232 | struct i2c_adapter *adap; |
979ea1dd | 1233 | struct v4l2_subdev *subdev; |
3d83078a | 1234 | char clk_name[V4L2_CLK_NAME_SIZE]; |
9aea470b | 1235 | int ret; |
e55222ef | 1236 | |
e09da11d GL |
1237 | /* First find out how we link the main client */ |
1238 | if (icd->sasc) { | |
1239 | /* Async non-OF probing handled by the subdevice list */ | |
1240 | return -EPROBE_DEFER; | |
1241 | } | |
1242 | ||
1243 | ici = to_soc_camera_host(icd->parent); | |
1244 | adap = i2c_get_adapter(shd->i2c_adapter_id); | |
40e2e092 | 1245 | if (!adap) { |
7dfff953 | 1246 | dev_err(icd->pdev, "Cannot get I2C adapter #%d. No driver?\n", |
25a34811 | 1247 | shd->i2c_adapter_id); |
9aea470b | 1248 | return -ENODEV; |
40e2e092 | 1249 | } |
e55222ef | 1250 | |
93623c87 | 1251 | ssdd = kmemdup(&sdesc->subdev_desc, sizeof(*ssdd), GFP_KERNEL); |
23272427 GL |
1252 | if (!ssdd) { |
1253 | ret = -ENOMEM; | |
1254 | goto ealloc; | |
1255 | } | |
23272427 GL |
1256 | /* |
1257 | * In synchronous case we request regulators ourselves in | |
1258 | * soc_camera_pdrv_probe(), make sure the subdevice driver doesn't try | |
1259 | * to allocate them again. | |
1260 | */ | |
d3f884a7 GL |
1261 | ssdd->sd_pdata.num_regulators = 0; |
1262 | ssdd->sd_pdata.regulators = NULL; | |
23272427 | 1263 | shd->board_info->platform_data = ssdd; |
e55222ef | 1264 | |
af4d8347 JW |
1265 | v4l2_clk_name_i2c(clk_name, sizeof(clk_name), |
1266 | shd->i2c_adapter_id, shd->board_info->addr); | |
9aea470b | 1267 | |
a37462b9 | 1268 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); |
9aea470b GL |
1269 | if (IS_ERR(icd->clk)) { |
1270 | ret = PTR_ERR(icd->clk); | |
1271 | goto eclkreg; | |
1272 | } | |
1273 | ||
979ea1dd | 1274 | subdev = v4l2_i2c_new_subdev_board(&ici->v4l2_dev, adap, |
25a34811 | 1275 | shd->board_info, NULL); |
9aea470b GL |
1276 | if (!subdev) { |
1277 | ret = -ENODEV; | |
40e2e092 | 1278 | goto ei2cnd; |
9aea470b | 1279 | } |
e55222ef | 1280 | |
c4ce6d14 | 1281 | client = v4l2_get_subdevdata(subdev); |
979ea1dd | 1282 | |
40e2e092 | 1283 | /* Use to_i2c_client(dev) to recover the i2c client */ |
7dfff953 | 1284 | icd->control = &client->dev; |
e55222ef | 1285 | |
40e2e092 GL |
1286 | return 0; |
1287 | ei2cnd: | |
9aea470b | 1288 | v4l2_clk_unregister(icd->clk); |
e09da11d | 1289 | icd->clk = NULL; |
23272427 GL |
1290 | eclkreg: |
1291 | kfree(ssdd); | |
1292 | ealloc: | |
40e2e092 | 1293 | i2c_put_adapter(adap); |
9aea470b | 1294 | return ret; |
e55222ef GL |
1295 | } |
1296 | ||
e09da11d | 1297 | static void soc_camera_i2c_free(struct soc_camera_device *icd) |
40e2e092 GL |
1298 | { |
1299 | struct i2c_client *client = | |
1300 | to_i2c_client(to_soc_camera_control(icd)); | |
e09da11d | 1301 | struct i2c_adapter *adap; |
23272427 | 1302 | struct soc_camera_subdev_desc *ssdd; |
7dfff953 GL |
1303 | |
1304 | icd->control = NULL; | |
e09da11d GL |
1305 | if (icd->sasc) |
1306 | return; | |
1307 | ||
1308 | adap = client->adapter; | |
23272427 | 1309 | ssdd = client->dev.platform_data; |
979ea1dd | 1310 | v4l2_device_unregister_subdev(i2c_get_clientdata(client)); |
40e2e092 | 1311 | i2c_unregister_device(client); |
c8dd7078 | 1312 | i2c_put_adapter(adap); |
23272427 | 1313 | kfree(ssdd); |
9aea470b GL |
1314 | v4l2_clk_unregister(icd->clk); |
1315 | icd->clk = NULL; | |
40e2e092 | 1316 | } |
e09da11d GL |
1317 | |
1318 | /* | |
1319 | * V4L2 asynchronous notifier callbacks. They are all called under a v4l2-async | |
1320 | * internal global mutex, therefore cannot race against other asynchronous | |
1321 | * events. Until notifier->complete() (soc_camera_async_complete()) is called, | |
1322 | * the video device node is not registered and no V4L fops can occur. Unloading | |
1323 | * of the host driver also calls a v4l2-async function, so also there we're | |
1324 | * protected. | |
1325 | */ | |
1326 | static int soc_camera_async_bound(struct v4l2_async_notifier *notifier, | |
1327 | struct v4l2_subdev *sd, | |
1328 | struct v4l2_async_subdev *asd) | |
1329 | { | |
1330 | struct soc_camera_async_client *sasc = container_of(notifier, | |
1331 | struct soc_camera_async_client, notifier); | |
1332 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); | |
1333 | ||
1334 | if (asd == sasc->sensor && !WARN_ON(icd->control)) { | |
1335 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
1336 | ||
1337 | /* | |
1338 | * Only now we get subdevice-specific information like | |
1339 | * regulators, flags, callbacks, etc. | |
1340 | */ | |
1341 | if (client) { | |
1342 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); | |
1343 | struct soc_camera_subdev_desc *ssdd = | |
1344 | soc_camera_i2c_to_desc(client); | |
1345 | if (ssdd) { | |
1346 | memcpy(&sdesc->subdev_desc, ssdd, | |
1347 | sizeof(sdesc->subdev_desc)); | |
1348 | if (ssdd->reset) | |
0b9508aa | 1349 | ssdd->reset(&client->dev); |
e09da11d GL |
1350 | } |
1351 | ||
1352 | icd->control = &client->dev; | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static void soc_camera_async_unbind(struct v4l2_async_notifier *notifier, | |
1360 | struct v4l2_subdev *sd, | |
1361 | struct v4l2_async_subdev *asd) | |
1362 | { | |
1363 | struct soc_camera_async_client *sasc = container_of(notifier, | |
1364 | struct soc_camera_async_client, notifier); | |
1365 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); | |
1366 | ||
e920ebc2 WS |
1367 | icd->control = NULL; |
1368 | ||
e09da11d GL |
1369 | if (icd->clk) { |
1370 | v4l2_clk_unregister(icd->clk); | |
1371 | icd->clk = NULL; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | static int soc_camera_async_complete(struct v4l2_async_notifier *notifier) | |
1376 | { | |
1377 | struct soc_camera_async_client *sasc = container_of(notifier, | |
1378 | struct soc_camera_async_client, notifier); | |
1379 | struct soc_camera_device *icd = platform_get_drvdata(sasc->pdev); | |
1380 | ||
1381 | if (to_soc_camera_control(icd)) { | |
1382 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); | |
1383 | int ret; | |
1384 | ||
1385 | mutex_lock(&list_lock); | |
1386 | ret = soc_camera_probe(ici, icd); | |
1387 | mutex_unlock(&list_lock); | |
1388 | if (ret < 0) | |
1389 | return ret; | |
1390 | } | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
b6ee3f0d LP |
1395 | static const struct v4l2_async_notifier_operations soc_camera_async_ops = { |
1396 | .bound = soc_camera_async_bound, | |
1397 | .unbind = soc_camera_async_unbind, | |
1398 | .complete = soc_camera_async_complete, | |
1399 | }; | |
1400 | ||
e09da11d | 1401 | static int scan_async_group(struct soc_camera_host *ici, |
f687f326 | 1402 | struct v4l2_async_subdev **asd, unsigned int size) |
e09da11d GL |
1403 | { |
1404 | struct soc_camera_async_subdev *sasd; | |
1405 | struct soc_camera_async_client *sasc; | |
1406 | struct soc_camera_device *icd; | |
1407 | struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; | |
3d83078a | 1408 | char clk_name[V4L2_CLK_NAME_SIZE]; |
85e86c6e HV |
1409 | unsigned int i; |
1410 | int ret; | |
e09da11d GL |
1411 | |
1412 | /* First look for a sensor */ | |
1413 | for (i = 0; i < size; i++) { | |
1414 | sasd = container_of(asd[i], struct soc_camera_async_subdev, asd); | |
1415 | if (sasd->role == SOCAM_SUBDEV_DATA_SOURCE) | |
1416 | break; | |
1417 | } | |
1418 | ||
85e86c6e | 1419 | if (i >= size || asd[i]->match_type != V4L2_ASYNC_MATCH_I2C) { |
e09da11d GL |
1420 | /* All useless */ |
1421 | dev_err(ici->v4l2_dev.dev, "No I2C data source found!\n"); | |
1422 | return -ENODEV; | |
1423 | } | |
1424 | ||
1425 | /* Or shall this be managed by the soc-camera device? */ | |
1426 | sasc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sasc), GFP_KERNEL); | |
1427 | if (!sasc) | |
1428 | return -ENOMEM; | |
1429 | ||
1430 | /* HACK: just need a != NULL */ | |
1431 | sdesc.host_desc.board_info = ERR_PTR(-ENODATA); | |
1432 | ||
1433 | ret = soc_camera_dyn_pdev(&sdesc, sasc); | |
1434 | if (ret < 0) | |
057c2a2e | 1435 | goto eallocpdev; |
e09da11d GL |
1436 | |
1437 | sasc->sensor = &sasd->asd; | |
1438 | ||
1439 | icd = soc_camera_add_pdev(sasc); | |
1440 | if (!icd) { | |
057c2a2e GL |
1441 | ret = -ENOMEM; |
1442 | goto eaddpdev; | |
e09da11d GL |
1443 | } |
1444 | ||
e8419d08 | 1445 | sasc->notifier.subdevs = asd; |
e09da11d | 1446 | sasc->notifier.num_subdevs = size; |
b6ee3f0d | 1447 | sasc->notifier.ops = &soc_camera_async_ops; |
e09da11d GL |
1448 | |
1449 | icd->sasc = sasc; | |
1450 | icd->parent = ici->v4l2_dev.dev; | |
1451 | ||
af4d8347 JW |
1452 | v4l2_clk_name_i2c(clk_name, sizeof(clk_name), |
1453 | sasd->asd.match.i2c.adapter_id, | |
1454 | sasd->asd.match.i2c.address); | |
e09da11d | 1455 | |
a37462b9 | 1456 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); |
e09da11d GL |
1457 | if (IS_ERR(icd->clk)) { |
1458 | ret = PTR_ERR(icd->clk); | |
1459 | goto eclkreg; | |
1460 | } | |
1461 | ||
1462 | ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); | |
1463 | if (!ret) | |
1464 | return 0; | |
1465 | ||
1466 | v4l2_clk_unregister(icd->clk); | |
1467 | eclkreg: | |
1468 | icd->clk = NULL; | |
057c2a2e GL |
1469 | platform_device_del(sasc->pdev); |
1470 | eaddpdev: | |
1471 | platform_device_put(sasc->pdev); | |
1472 | eallocpdev: | |
1473 | devm_kfree(ici->v4l2_dev.dev, sasc); | |
e09da11d GL |
1474 | dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); |
1475 | ||
1476 | return ret; | |
1477 | } | |
1478 | ||
1479 | static void scan_async_host(struct soc_camera_host *ici) | |
1480 | { | |
1481 | struct v4l2_async_subdev **asd; | |
1482 | int j; | |
1483 | ||
1484 | for (j = 0, asd = ici->asd; ici->asd_sizes[j]; j++) { | |
1485 | scan_async_group(ici, asd, ici->asd_sizes[j]); | |
1486 | asd += ici->asd_sizes[j]; | |
1487 | } | |
1488 | } | |
40e2e092 | 1489 | #else |
e09da11d GL |
1490 | #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) |
1491 | #define soc_camera_i2c_free(icd) do {} while (0) | |
1492 | #define scan_async_host(ici) do {} while (0) | |
40e2e092 GL |
1493 | #endif |
1494 | ||
1ddc6a6c BD |
1495 | #ifdef CONFIG_OF |
1496 | ||
1497 | struct soc_of_info { | |
1498 | struct soc_camera_async_subdev sasd; | |
1499 | struct soc_camera_async_client sasc; | |
1500 | struct v4l2_async_subdev *subdev; | |
1501 | }; | |
1502 | ||
1503 | static int soc_of_bind(struct soc_camera_host *ici, | |
1504 | struct device_node *ep, | |
1505 | struct device_node *remote) | |
1506 | { | |
1507 | struct soc_camera_device *icd; | |
1508 | struct soc_camera_desc sdesc = {.host_desc.bus_id = ici->nr,}; | |
1509 | struct soc_camera_async_client *sasc; | |
1510 | struct soc_of_info *info; | |
1511 | struct i2c_client *client; | |
3d83078a | 1512 | char clk_name[V4L2_CLK_NAME_SIZE]; |
1ddc6a6c BD |
1513 | int ret; |
1514 | ||
1515 | /* allocate a new subdev and add match info to it */ | |
1516 | info = devm_kzalloc(ici->v4l2_dev.dev, sizeof(struct soc_of_info), | |
1517 | GFP_KERNEL); | |
1518 | if (!info) | |
1519 | return -ENOMEM; | |
1520 | ||
4e48afec | 1521 | info->sasd.asd.match.fwnode = of_fwnode_handle(remote); |
859969b3 | 1522 | info->sasd.asd.match_type = V4L2_ASYNC_MATCH_FWNODE; |
1ddc6a6c BD |
1523 | info->subdev = &info->sasd.asd; |
1524 | ||
1525 | /* Or shall this be managed by the soc-camera device? */ | |
1526 | sasc = &info->sasc; | |
1527 | ||
1528 | /* HACK: just need a != NULL */ | |
1529 | sdesc.host_desc.board_info = ERR_PTR(-ENODATA); | |
1530 | ||
1531 | ret = soc_camera_dyn_pdev(&sdesc, sasc); | |
1532 | if (ret < 0) | |
1533 | goto eallocpdev; | |
1534 | ||
1535 | sasc->sensor = &info->sasd.asd; | |
1536 | ||
1537 | icd = soc_camera_add_pdev(sasc); | |
1538 | if (!icd) { | |
1539 | ret = -ENOMEM; | |
1540 | goto eaddpdev; | |
1541 | } | |
1542 | ||
1543 | sasc->notifier.subdevs = &info->subdev; | |
1544 | sasc->notifier.num_subdevs = 1; | |
b6ee3f0d | 1545 | sasc->notifier.ops = &soc_camera_async_ops; |
1ddc6a6c BD |
1546 | |
1547 | icd->sasc = sasc; | |
1548 | icd->parent = ici->v4l2_dev.dev; | |
1549 | ||
1550 | client = of_find_i2c_device_by_node(remote); | |
1551 | ||
1552 | if (client) | |
af4d8347 JW |
1553 | v4l2_clk_name_i2c(clk_name, sizeof(clk_name), |
1554 | client->adapter->nr, client->addr); | |
1ddc6a6c | 1555 | else |
68d9c47b | 1556 | v4l2_clk_name_of(clk_name, sizeof(clk_name), remote); |
1ddc6a6c | 1557 | |
a37462b9 | 1558 | icd->clk = v4l2_clk_register(&soc_camera_clk_ops, clk_name, icd); |
1ddc6a6c BD |
1559 | if (IS_ERR(icd->clk)) { |
1560 | ret = PTR_ERR(icd->clk); | |
1561 | goto eclkreg; | |
1562 | } | |
1563 | ||
1564 | ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); | |
1565 | if (!ret) | |
1566 | return 0; | |
2af12f02 LP |
1567 | |
1568 | v4l2_clk_unregister(icd->clk); | |
1ddc6a6c BD |
1569 | eclkreg: |
1570 | icd->clk = NULL; | |
1571 | platform_device_del(sasc->pdev); | |
1572 | eaddpdev: | |
1573 | platform_device_put(sasc->pdev); | |
1574 | eallocpdev: | |
8e48a2d5 | 1575 | devm_kfree(ici->v4l2_dev.dev, info); |
1ddc6a6c BD |
1576 | dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret); |
1577 | ||
1578 | return ret; | |
1579 | } | |
1580 | ||
1581 | static void scan_of_host(struct soc_camera_host *ici) | |
1582 | { | |
1583 | struct device *dev = ici->v4l2_dev.dev; | |
1584 | struct device_node *np = dev->of_node; | |
1585 | struct device_node *epn = NULL, *ren; | |
1586 | unsigned int i; | |
1587 | ||
1588 | for (i = 0; ; i++) { | |
1589 | epn = of_graph_get_next_endpoint(np, epn); | |
1590 | if (!epn) | |
1591 | break; | |
1592 | ||
1593 | ren = of_graph_get_remote_port(epn); | |
1594 | if (!ren) { | |
68d9c47b | 1595 | dev_notice(dev, "no remote for %pOF\n", epn); |
1ddc6a6c BD |
1596 | continue; |
1597 | } | |
1598 | ||
1599 | /* so we now have a remote node to connect */ | |
1600 | if (!i) | |
1601 | soc_of_bind(ici, epn, ren->parent); | |
1602 | ||
1ddc6a6c BD |
1603 | of_node_put(ren); |
1604 | ||
1605 | if (i) { | |
1606 | dev_err(dev, "multiple subdevices aren't supported yet!\n"); | |
1607 | break; | |
1608 | } | |
1609 | } | |
f033c0bc PZ |
1610 | |
1611 | of_node_put(epn); | |
1ddc6a6c BD |
1612 | } |
1613 | ||
1614 | #else | |
1615 | static inline void scan_of_host(struct soc_camera_host *ici) { } | |
1616 | #endif | |
1617 | ||
40e2e092 | 1618 | /* Called during host-driver probe */ |
e09da11d GL |
1619 | static int soc_camera_probe(struct soc_camera_host *ici, |
1620 | struct soc_camera_device *icd) | |
e55222ef | 1621 | { |
25a34811 GL |
1622 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
1623 | struct soc_camera_host_desc *shd = &sdesc->host_desc; | |
979ea1dd | 1624 | struct device *control = NULL; |
e55222ef GL |
1625 | int ret; |
1626 | ||
7dfff953 | 1627 | dev_info(icd->pdev, "Probing %s\n", dev_name(icd->pdev)); |
1c3bb743 | 1628 | |
ee02da64 HV |
1629 | /* |
1630 | * Currently the subdev with the largest number of controls (13) is | |
1631 | * ov6550. So let's pick 16 as a hint for the control handler. Note | |
1632 | * that this is a hint only: too large and you waste some memory, too | |
1633 | * small and there is a (very) small performance hit when looking up | |
1634 | * controls in the internal hash. | |
1635 | */ | |
1636 | ret = v4l2_ctrl_handler_init(&icd->ctrl_handler, 16); | |
1637 | if (ret < 0) | |
1638 | return ret; | |
1639 | ||
979ea1dd | 1640 | /* Must have icd->vdev before registering the device */ |
40e2e092 GL |
1641 | ret = video_dev_create(icd); |
1642 | if (ret < 0) | |
1643 | goto evdc; | |
1c3bb743 | 1644 | |
9aea470b GL |
1645 | /* |
1646 | * ..._video_start() will create a device node, video_register_device() | |
1647 | * itself is protected against concurrent open() calls, but we also have | |
1648 | * to protect our data also during client probing. | |
1649 | */ | |
9aea470b | 1650 | |
40e2e092 | 1651 | /* Non-i2c cameras, e.g., soc_camera_platform, have no board_info */ |
25a34811 | 1652 | if (shd->board_info) { |
e09da11d GL |
1653 | ret = soc_camera_i2c_init(icd, sdesc); |
1654 | if (ret < 0 && ret != -EPROBE_DEFER) | |
9aea470b | 1655 | goto eadd; |
25a34811 | 1656 | } else if (!shd->add_device || !shd->del_device) { |
1c3bb743 | 1657 | ret = -EINVAL; |
9aea470b | 1658 | goto eadd; |
40e2e092 | 1659 | } else { |
3781760a | 1660 | ret = soc_camera_clock_start(ici); |
9aea470b GL |
1661 | if (ret < 0) |
1662 | goto eadd; | |
1663 | ||
25a34811 GL |
1664 | if (shd->module_name) |
1665 | ret = request_module(shd->module_name); | |
979ea1dd | 1666 | |
25a34811 | 1667 | ret = shd->add_device(icd); |
40e2e092 GL |
1668 | if (ret < 0) |
1669 | goto eadddev; | |
1c3bb743 | 1670 | |
96c75399 GL |
1671 | /* |
1672 | * FIXME: this is racy, have to use driver-binding notification, | |
1673 | * when it is available | |
1674 | */ | |
979ea1dd | 1675 | control = to_soc_camera_control(icd); |
08590b96 | 1676 | if (!control || !control->driver || !dev_get_drvdata(control) || |
979ea1dd | 1677 | !try_module_get(control->driver->owner)) { |
25a34811 | 1678 | shd->del_device(icd); |
7ae77ee9 | 1679 | ret = -ENODEV; |
979ea1dd GL |
1680 | goto enodrv; |
1681 | } | |
40e2e092 | 1682 | } |
e55222ef | 1683 | |
e09da11d GL |
1684 | mutex_lock(&ici->host_lock); |
1685 | ret = soc_camera_probe_finish(icd); | |
dd669e90 | 1686 | mutex_unlock(&ici->host_lock); |
e09da11d GL |
1687 | if (ret < 0) |
1688 | goto efinish; | |
025c18a1 | 1689 | |
40e2e092 | 1690 | return 0; |
e55222ef | 1691 | |
e09da11d | 1692 | efinish: |
25a34811 | 1693 | if (shd->board_info) { |
e09da11d | 1694 | soc_camera_i2c_free(icd); |
979ea1dd | 1695 | } else { |
25a34811 | 1696 | shd->del_device(icd); |
979ea1dd | 1697 | module_put(control->driver->owner); |
979ea1dd | 1698 | enodrv: |
40e2e092 | 1699 | eadddev: |
3781760a | 1700 | soc_camera_clock_stop(ici); |
9aea470b GL |
1701 | } |
1702 | eadd: | |
e09da11d GL |
1703 | if (icd->vdev) { |
1704 | video_device_release(icd->vdev); | |
1705 | icd->vdev = NULL; | |
1706 | } | |
9aea470b | 1707 | evdc: |
ee02da64 | 1708 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
e55222ef GL |
1709 | return ret; |
1710 | } | |
1711 | ||
5d28d525 GL |
1712 | /* |
1713 | * This is called on device_unregister, which only means we have to disconnect | |
e09da11d GL |
1714 | * from the host, but not remove ourselves from the device list. With |
1715 | * asynchronous client probing this can also be called without | |
1716 | * soc_camera_probe_finish() having run. Careful with clean up. | |
5d28d525 | 1717 | */ |
7dfff953 | 1718 | static int soc_camera_remove(struct soc_camera_device *icd) |
e55222ef | 1719 | { |
25a34811 | 1720 | struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); |
40e2e092 | 1721 | struct video_device *vdev = icd->vdev; |
e55222ef | 1722 | |
ee02da64 | 1723 | v4l2_ctrl_handler_free(&icd->ctrl_handler); |
40e2e092 | 1724 | if (vdev) { |
40e2e092 GL |
1725 | video_unregister_device(vdev); |
1726 | icd->vdev = NULL; | |
40e2e092 GL |
1727 | } |
1728 | ||
25a34811 | 1729 | if (sdesc->host_desc.board_info) { |
e09da11d | 1730 | soc_camera_i2c_free(icd); |
979ea1dd | 1731 | } else { |
e09da11d GL |
1732 | struct device *dev = to_soc_camera_control(icd); |
1733 | struct device_driver *drv = dev ? dev->driver : NULL; | |
979ea1dd | 1734 | if (drv) { |
25a34811 | 1735 | sdesc->host_desc.del_device(icd); |
979ea1dd GL |
1736 | module_put(drv->owner); |
1737 | } | |
1738 | } | |
e09da11d GL |
1739 | |
1740 | if (icd->num_user_formats) | |
1741 | soc_camera_free_user_formats(icd); | |
1742 | ||
1743 | if (icd->clk) { | |
1744 | /* For the synchronous case */ | |
1745 | v4l2_clk_unregister(icd->clk); | |
1746 | icd->clk = NULL; | |
1747 | } | |
1748 | ||
1749 | if (icd->sasc) | |
1750 | platform_device_unregister(icd->sasc->pdev); | |
025c18a1 | 1751 | |
e55222ef GL |
1752 | return 0; |
1753 | } | |
1754 | ||
10d5509c HV |
1755 | static int default_g_selection(struct soc_camera_device *icd, |
1756 | struct v4l2_selection *sel) | |
6a6c8786 GL |
1757 | { |
1758 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
10d5509c HV |
1759 | struct v4l2_subdev_selection sdsel = { |
1760 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, | |
1761 | .target = sel->target, | |
1762 | }; | |
1763 | int ret; | |
6a6c8786 | 1764 | |
10d5509c HV |
1765 | ret = v4l2_subdev_call(sd, pad, get_selection, NULL, &sdsel); |
1766 | if (ret) | |
1767 | return ret; | |
1768 | sel->r = sdsel.r; | |
1769 | return 0; | |
6a6c8786 GL |
1770 | } |
1771 | ||
10d5509c HV |
1772 | static int default_s_selection(struct soc_camera_device *icd, |
1773 | struct v4l2_selection *sel) | |
6a6c8786 GL |
1774 | { |
1775 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
10d5509c HV |
1776 | struct v4l2_subdev_selection sdsel = { |
1777 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, | |
1778 | .target = sel->target, | |
1779 | .flags = sel->flags, | |
1780 | .r = sel->r, | |
1781 | }; | |
1782 | int ret; | |
1783 | ||
1784 | ret = v4l2_subdev_call(sd, pad, set_selection, NULL, &sdsel); | |
1785 | if (ret) | |
1786 | return ret; | |
1787 | sel->r = sdsel.r; | |
1788 | return 0; | |
6a6c8786 GL |
1789 | } |
1790 | ||
06e17821 | 1791 | static int default_g_parm(struct soc_camera_device *icd, |
4471109e | 1792 | struct v4l2_streamparm *a) |
06e17821 JK |
1793 | { |
1794 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
4471109e HV |
1795 | |
1796 | return v4l2_g_parm_cap(icd->vdev, sd, a); | |
06e17821 JK |
1797 | } |
1798 | ||
1799 | static int default_s_parm(struct soc_camera_device *icd, | |
4471109e | 1800 | struct v4l2_streamparm *a) |
06e17821 JK |
1801 | { |
1802 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
4471109e HV |
1803 | |
1804 | return v4l2_s_parm_cap(icd->vdev, sd, a); | |
06e17821 JK |
1805 | } |
1806 | ||
ad3537b5 GL |
1807 | static int default_enum_framesizes(struct soc_camera_device *icd, |
1808 | struct v4l2_frmsizeenum *fsize) | |
ed5b65dc QX |
1809 | { |
1810 | int ret; | |
1811 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); | |
1812 | const struct soc_camera_format_xlate *xlate; | |
17bef885 HV |
1813 | struct v4l2_subdev_frame_size_enum fse = { |
1814 | .index = fsize->index, | |
1815 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, | |
1816 | }; | |
ed5b65dc | 1817 | |
17bef885 | 1818 | xlate = soc_camera_xlate_by_fourcc(icd, fsize->pixel_format); |
ed5b65dc QX |
1819 | if (!xlate) |
1820 | return -EINVAL; | |
17bef885 | 1821 | fse.code = xlate->code; |
ed5b65dc | 1822 | |
17bef885 | 1823 | ret = v4l2_subdev_call(sd, pad, enum_frame_size, NULL, &fse); |
ed5b65dc QX |
1824 | if (ret < 0) |
1825 | return ret; | |
1826 | ||
17bef885 HV |
1827 | if (fse.min_width == fse.max_width && |
1828 | fse.min_height == fse.max_height) { | |
1829 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1830 | fsize->discrete.width = fse.min_width; | |
1831 | fsize->discrete.height = fse.min_height; | |
1832 | return 0; | |
1833 | } | |
1834 | fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; | |
1835 | fsize->stepwise.min_width = fse.min_width; | |
1836 | fsize->stepwise.max_width = fse.max_width; | |
1837 | fsize->stepwise.min_height = fse.min_height; | |
1838 | fsize->stepwise.max_height = fse.max_height; | |
1839 | fsize->stepwise.step_width = 1; | |
1840 | fsize->stepwise.step_height = 1; | |
ed5b65dc QX |
1841 | return 0; |
1842 | } | |
1843 | ||
b8d9904c | 1844 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef | 1845 | { |
e55222ef | 1846 | struct soc_camera_host *ix; |
979ea1dd | 1847 | int ret; |
e55222ef | 1848 | |
64f5905e GL |
1849 | if (!ici || !ici->ops || |
1850 | !ici->ops->try_fmt || | |
1851 | !ici->ops->set_fmt || | |
1852 | !ici->ops->set_bus_param || | |
1853 | !ici->ops->querycap || | |
73a01599 | 1854 | !ici->ops->init_videobuf2 || |
eff505fa | 1855 | !ici->ops->poll || |
979ea1dd | 1856 | !ici->v4l2_dev.dev) |
e55222ef GL |
1857 | return -EINVAL; |
1858 | ||
10d5509c HV |
1859 | if (!ici->ops->set_selection) |
1860 | ici->ops->set_selection = default_s_selection; | |
1861 | if (!ici->ops->get_selection) | |
1862 | ici->ops->get_selection = default_g_selection; | |
06e17821 JK |
1863 | if (!ici->ops->set_parm) |
1864 | ici->ops->set_parm = default_s_parm; | |
1865 | if (!ici->ops->get_parm) | |
1866 | ici->ops->get_parm = default_g_parm; | |
ad3537b5 GL |
1867 | if (!ici->ops->enum_framesizes) |
1868 | ici->ops->enum_framesizes = default_enum_framesizes; | |
6a6c8786 | 1869 | |
e55222ef GL |
1870 | mutex_lock(&list_lock); |
1871 | list_for_each_entry(ix, &hosts, list) { | |
1872 | if (ix->nr == ici->nr) { | |
979ea1dd GL |
1873 | ret = -EBUSY; |
1874 | goto edevreg; | |
e55222ef GL |
1875 | } |
1876 | } | |
1877 | ||
979ea1dd GL |
1878 | ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); |
1879 | if (ret < 0) | |
1880 | goto edevreg; | |
eff505fa | 1881 | |
e55222ef GL |
1882 | list_add_tail(&ici->list, &hosts); |
1883 | mutex_unlock(&list_lock); | |
1884 | ||
2f9a0c88 | 1885 | mutex_init(&ici->host_lock); |
e09da11d GL |
1886 | mutex_init(&ici->clk_lock); |
1887 | ||
1ddc6a6c BD |
1888 | if (ici->v4l2_dev.dev->of_node) |
1889 | scan_of_host(ici); | |
1890 | else if (ici->asd_sizes) | |
e09da11d GL |
1891 | /* |
1892 | * No OF, host with a list of subdevices. Don't try to mix | |
1893 | * modes by initialising some groups statically and some | |
1894 | * dynamically! | |
1895 | */ | |
1896 | scan_async_host(ici); | |
1897 | else | |
1898 | /* Legacy: static platform devices from board data */ | |
1899 | scan_add_host(ici); | |
e55222ef GL |
1900 | |
1901 | return 0; | |
979ea1dd GL |
1902 | |
1903 | edevreg: | |
1904 | mutex_unlock(&list_lock); | |
1905 | return ret; | |
e55222ef GL |
1906 | } |
1907 | EXPORT_SYMBOL(soc_camera_host_register); | |
1908 | ||
1909 | /* Unregister all clients! */ | |
1910 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
1911 | { | |
e09da11d GL |
1912 | struct soc_camera_device *icd, *tmp; |
1913 | struct soc_camera_async_client *sasc; | |
1914 | LIST_HEAD(notifiers); | |
e55222ef GL |
1915 | |
1916 | mutex_lock(&list_lock); | |
e55222ef | 1917 | list_del(&ici->list); |
7dfff953 | 1918 | list_for_each_entry(icd, &devices, list) |
e09da11d GL |
1919 | if (icd->iface == ici->nr && icd->sasc) { |
1920 | /* as long as we hold the device, sasc won't be freed */ | |
1921 | get_device(icd->pdev); | |
1922 | list_add(&icd->sasc->list, ¬ifiers); | |
1923 | } | |
1924 | mutex_unlock(&list_lock); | |
1925 | ||
1926 | list_for_each_entry(sasc, ¬ifiers, list) { | |
1927 | /* Must call unlocked to avoid AB-BA dead-lock */ | |
1928 | v4l2_async_notifier_unregister(&sasc->notifier); | |
1929 | put_device(&sasc->pdev->dev); | |
1930 | } | |
1931 | ||
1932 | mutex_lock(&list_lock); | |
1933 | ||
1934 | list_for_each_entry_safe(icd, tmp, &devices, list) | |
1935 | if (icd->iface == ici->nr) | |
7dfff953 | 1936 | soc_camera_remove(icd); |
e55222ef GL |
1937 | |
1938 | mutex_unlock(&list_lock); | |
1939 | ||
979ea1dd | 1940 | v4l2_device_unregister(&ici->v4l2_dev); |
e55222ef GL |
1941 | } |
1942 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
1943 | ||
1944 | /* Image capture device */ | |
40e2e092 | 1945 | static int soc_camera_device_register(struct soc_camera_device *icd) |
e55222ef GL |
1946 | { |
1947 | struct soc_camera_device *ix; | |
1948 | int num = -1, i; | |
1949 | ||
e09da11d | 1950 | mutex_lock(&list_lock); |
e55222ef GL |
1951 | for (i = 0; i < 256 && num < 0; i++) { |
1952 | num = i; | |
40e2e092 | 1953 | /* Check if this index is available on this interface */ |
e55222ef GL |
1954 | list_for_each_entry(ix, &devices, list) { |
1955 | if (ix->iface == icd->iface && ix->devnum == i) { | |
1956 | num = -1; | |
1957 | break; | |
1958 | } | |
1959 | } | |
1960 | } | |
1961 | ||
e09da11d | 1962 | if (num < 0) { |
5d28d525 GL |
1963 | /* |
1964 | * ok, we have 256 cameras on this host... | |
1965 | * man, stay reasonable... | |
1966 | */ | |
e09da11d | 1967 | mutex_unlock(&list_lock); |
e55222ef | 1968 | return -ENOMEM; |
e09da11d | 1969 | } |
e55222ef | 1970 | |
64ff9ba5 | 1971 | icd->devnum = num; |
64f5905e GL |
1972 | icd->use_count = 0; |
1973 | icd->host_priv = NULL; | |
e55222ef | 1974 | |
e09da11d GL |
1975 | /* |
1976 | * Dynamically allocated devices set the bit earlier, but it doesn't hurt setting | |
1977 | * it again | |
1978 | */ | |
1979 | i = to_platform_device(icd->pdev)->id; | |
1980 | if (i < 0) | |
1981 | /* One static (legacy) soc-camera platform device */ | |
1982 | i = 0; | |
1983 | if (i >= MAP_MAX_NUM) { | |
1984 | mutex_unlock(&list_lock); | |
1985 | return -EBUSY; | |
1986 | } | |
1987 | set_bit(i, device_map); | |
40e2e092 | 1988 | list_add_tail(&icd->list, &devices); |
e09da11d | 1989 | mutex_unlock(&list_lock); |
40e2e092 GL |
1990 | |
1991 | return 0; | |
e55222ef | 1992 | } |
e55222ef | 1993 | |
a399810c HV |
1994 | static const struct v4l2_ioctl_ops soc_camera_ioctl_ops = { |
1995 | .vidioc_querycap = soc_camera_querycap, | |
7ae77ee9 | 1996 | .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap, |
a399810c | 1997 | .vidioc_g_fmt_vid_cap = soc_camera_g_fmt_vid_cap, |
a399810c | 1998 | .vidioc_s_fmt_vid_cap = soc_camera_s_fmt_vid_cap, |
7ae77ee9 | 1999 | .vidioc_enum_fmt_vid_cap = soc_camera_enum_fmt_vid_cap, |
a399810c HV |
2000 | .vidioc_enum_input = soc_camera_enum_input, |
2001 | .vidioc_g_input = soc_camera_g_input, | |
2002 | .vidioc_s_input = soc_camera_s_input, | |
2003 | .vidioc_s_std = soc_camera_s_std, | |
2f0babb7 | 2004 | .vidioc_g_std = soc_camera_g_std, |
ad3537b5 | 2005 | .vidioc_enum_framesizes = soc_camera_enum_framesizes, |
a399810c | 2006 | .vidioc_reqbufs = soc_camera_reqbufs, |
a399810c HV |
2007 | .vidioc_querybuf = soc_camera_querybuf, |
2008 | .vidioc_qbuf = soc_camera_qbuf, | |
2009 | .vidioc_dqbuf = soc_camera_dqbuf, | |
7ae77ee9 GL |
2010 | .vidioc_create_bufs = soc_camera_create_bufs, |
2011 | .vidioc_prepare_buf = soc_camera_prepare_buf, | |
c710f591 | 2012 | .vidioc_expbuf = soc_camera_expbuf, |
a399810c HV |
2013 | .vidioc_streamon = soc_camera_streamon, |
2014 | .vidioc_streamoff = soc_camera_streamoff, | |
3bfb4100 GL |
2015 | .vidioc_g_selection = soc_camera_g_selection, |
2016 | .vidioc_s_selection = soc_camera_s_selection, | |
c9f6ef69 GL |
2017 | .vidioc_g_parm = soc_camera_g_parm, |
2018 | .vidioc_s_parm = soc_camera_s_parm, | |
a399810c HV |
2019 | }; |
2020 | ||
40e2e092 | 2021 | static int video_dev_create(struct soc_camera_device *icd) |
e55222ef | 2022 | { |
7dfff953 | 2023 | struct soc_camera_host *ici = to_soc_camera_host(icd->parent); |
40e2e092 | 2024 | struct video_device *vdev = video_device_alloc(); |
e55222ef | 2025 | |
e55222ef | 2026 | if (!vdev) |
40e2e092 | 2027 | return -ENOMEM; |
e55222ef GL |
2028 | |
2029 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
1c3bb743 | 2030 | |
14381c26 | 2031 | vdev->v4l2_dev = &ici->v4l2_dev; |
e55222ef | 2032 | vdev->fops = &soc_camera_fops; |
a399810c | 2033 | vdev->ioctl_ops = &soc_camera_ioctl_ops; |
e55222ef | 2034 | vdev->release = video_device_release; |
ee02da64 | 2035 | vdev->ctrl_handler = &icd->ctrl_handler; |
dd669e90 | 2036 | vdev->lock = &ici->host_lock; |
e55222ef | 2037 | |
e55222ef GL |
2038 | icd->vdev = vdev; |
2039 | ||
2040 | return 0; | |
40e2e092 | 2041 | } |
e55222ef | 2042 | |
40e2e092 | 2043 | /* |
dd669e90 | 2044 | * Called from soc_camera_probe() above with .host_lock held |
40e2e092 | 2045 | */ |
979ea1dd | 2046 | static int soc_camera_video_start(struct soc_camera_device *icd) |
40e2e092 | 2047 | { |
d364ee4f | 2048 | const struct device_type *type = icd->vdev->dev.type; |
979ea1dd | 2049 | int ret; |
40e2e092 | 2050 | |
7dfff953 | 2051 | if (!icd->parent) |
40e2e092 GL |
2052 | return -ENODEV; |
2053 | ||
14381c26 | 2054 | video_set_drvdata(icd->vdev, icd); |
f6cc51a9 HV |
2055 | if (icd->vdev->tvnorms == 0) { |
2056 | /* disable the STD API if there are no tvnorms defined */ | |
2057 | v4l2_disable_ioctl(icd->vdev, VIDIOC_G_STD); | |
2058 | v4l2_disable_ioctl(icd->vdev, VIDIOC_S_STD); | |
2059 | v4l2_disable_ioctl(icd->vdev, VIDIOC_ENUMSTD); | |
2060 | } | |
46b21094 | 2061 | ret = video_register_device(icd->vdev, VFL_TYPE_GRABBER, -1); |
979ea1dd | 2062 | if (ret < 0) { |
7dfff953 | 2063 | dev_err(icd->pdev, "video_register_device failed: %d\n", ret); |
979ea1dd GL |
2064 | return ret; |
2065 | } | |
40e2e092 | 2066 | |
4f9fb5ed MCC |
2067 | /* Restore device type, possibly set by the subdevice driver */ |
2068 | icd->vdev->dev.type = type; | |
2069 | ||
979ea1dd | 2070 | return 0; |
e55222ef | 2071 | } |
e55222ef | 2072 | |
4c62e976 | 2073 | static int soc_camera_pdrv_probe(struct platform_device *pdev) |
0fd327bd | 2074 | { |
25a34811 GL |
2075 | struct soc_camera_desc *sdesc = pdev->dev.platform_data; |
2076 | struct soc_camera_subdev_desc *ssdd = &sdesc->subdev_desc; | |
40e2e092 | 2077 | struct soc_camera_device *icd; |
8a97d4c1 | 2078 | int ret; |
0fd327bd | 2079 | |
25a34811 | 2080 | if (!sdesc) |
40e2e092 | 2081 | return -EINVAL; |
0fd327bd | 2082 | |
02249369 | 2083 | icd = devm_kzalloc(&pdev->dev, sizeof(*icd), GFP_KERNEL); |
40e2e092 GL |
2084 | if (!icd) |
2085 | return -ENOMEM; | |
0fd327bd | 2086 | |
e09da11d GL |
2087 | /* |
2088 | * In the asynchronous case ssdd->num_regulators == 0 yet, so, the below | |
23272427 GL |
2089 | * regulator allocation is a dummy. They are actually requested by the |
2090 | * subdevice driver, using soc_camera_power_init(). Also note, that in | |
2091 | * that case regulators are attached to the I2C device and not to the | |
2092 | * camera platform device. | |
e09da11d | 2093 | */ |
d3f884a7 GL |
2094 | ret = devm_regulator_bulk_get(&pdev->dev, ssdd->sd_pdata.num_regulators, |
2095 | ssdd->sd_pdata.regulators); | |
8a97d4c1 GL |
2096 | if (ret < 0) |
2097 | return ret; | |
2098 | ||
25a34811 GL |
2099 | icd->iface = sdesc->host_desc.bus_id; |
2100 | icd->sdesc = sdesc; | |
979ea1dd | 2101 | icd->pdev = &pdev->dev; |
40e2e092 | 2102 | platform_set_drvdata(pdev, icd); |
0fd327bd | 2103 | |
6a6c8786 GL |
2104 | icd->user_width = DEFAULT_WIDTH; |
2105 | icd->user_height = DEFAULT_HEIGHT; | |
2106 | ||
02249369 | 2107 | return soc_camera_device_register(icd); |
c41debaf | 2108 | } |
0fd327bd | 2109 | |
5d28d525 GL |
2110 | /* |
2111 | * Only called on rmmod for each platform device, since they are not | |
40e2e092 | 2112 | * hot-pluggable. Now we know, that all our users - hosts and devices have |
5d28d525 GL |
2113 | * been unloaded already |
2114 | */ | |
4c62e976 | 2115 | static int soc_camera_pdrv_remove(struct platform_device *pdev) |
c41debaf | 2116 | { |
40e2e092 | 2117 | struct soc_camera_device *icd = platform_get_drvdata(pdev); |
e09da11d | 2118 | int i; |
c41debaf | 2119 | |
40e2e092 | 2120 | if (!icd) |
c41debaf GL |
2121 | return -EINVAL; |
2122 | ||
e09da11d GL |
2123 | i = pdev->id; |
2124 | if (i < 0) | |
2125 | i = 0; | |
2126 | ||
2127 | /* | |
2128 | * In synchronous mode with static platform devices this is called in a | |
2129 | * loop from drivers/base/dd.c::driver_detach(), no parallel execution, | |
2130 | * no need to lock. In asynchronous case the caller - | |
2131 | * soc_camera_host_unregister() - already holds the lock | |
2132 | */ | |
2133 | if (test_bit(i, device_map)) { | |
2134 | clear_bit(i, device_map); | |
2135 | list_del(&icd->list); | |
2136 | } | |
c41debaf | 2137 | |
0fd327bd GL |
2138 | return 0; |
2139 | } | |
2140 | ||
2141 | static struct platform_driver __refdata soc_camera_pdrv = { | |
1858c99d | 2142 | .probe = soc_camera_pdrv_probe, |
4c62e976 | 2143 | .remove = soc_camera_pdrv_remove, |
40e2e092 GL |
2144 | .driver = { |
2145 | .name = "soc-camera-pdrv", | |
0fd327bd GL |
2146 | }, |
2147 | }; | |
2148 | ||
ec0341b3 | 2149 | module_platform_driver(soc_camera_pdrv); |
e55222ef GL |
2150 | |
2151 | MODULE_DESCRIPTION("Image capture bus driver"); | |
2152 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
2153 | MODULE_LICENSE("GPL"); | |
0fd327bd | 2154 | MODULE_ALIAS("platform:soc-camera-pdrv"); |