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 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/list.h> | |
23 | #include <linux/err.h> | |
24 | #include <linux/mutex.h> | |
25 | #include <linux/vmalloc.h> | |
26 | ||
27 | #include <media/v4l2-common.h> | |
28 | #include <media/v4l2-dev.h> | |
29 | #include <media/soc_camera.h> | |
30 | ||
31 | static LIST_HEAD(hosts); | |
32 | static LIST_HEAD(devices); | |
33 | static DEFINE_MUTEX(list_lock); | |
34 | static DEFINE_MUTEX(video_lock); | |
35 | ||
36 | const static struct soc_camera_data_format* | |
37 | format_by_fourcc(struct soc_camera_device *icd, unsigned int fourcc) | |
38 | { | |
39 | unsigned int i; | |
40 | ||
26f1b942 GL |
41 | for (i = 0; i < icd->num_formats; i++) |
42 | if (icd->formats[i].fourcc == fourcc) | |
43 | return icd->formats + i; | |
e55222ef GL |
44 | return NULL; |
45 | } | |
46 | ||
47 | static int soc_camera_try_fmt_cap(struct file *file, void *priv, | |
48 | struct v4l2_format *f) | |
49 | { | |
50 | struct soc_camera_file *icf = file->private_data; | |
51 | struct soc_camera_device *icd = icf->icd; | |
52 | struct soc_camera_host *ici = | |
53 | to_soc_camera_host(icd->dev.parent); | |
54 | enum v4l2_field field; | |
55 | const struct soc_camera_data_format *fmt; | |
56 | int ret; | |
57 | ||
58 | WARN_ON(priv != file->private_data); | |
59 | ||
60 | fmt = format_by_fourcc(icd, f->fmt.pix.pixelformat); | |
61 | if (!fmt) { | |
62 | dev_dbg(&icd->dev, "invalid format 0x%08x\n", | |
63 | f->fmt.pix.pixelformat); | |
64 | return -EINVAL; | |
65 | } | |
66 | ||
67 | dev_dbg(&icd->dev, "fmt: 0x%08x\n", fmt->fourcc); | |
68 | ||
69 | field = f->fmt.pix.field; | |
70 | ||
71 | if (field == V4L2_FIELD_ANY) { | |
72 | field = V4L2_FIELD_NONE; | |
73 | } else if (V4L2_FIELD_NONE != field) { | |
74 | dev_err(&icd->dev, "Field type invalid.\n"); | |
75 | return -EINVAL; | |
76 | } | |
77 | ||
ad5f2e85 | 78 | /* test physical bus parameters */ |
b8d9904c | 79 | ret = ici->ops->try_bus_param(icd, f->fmt.pix.pixelformat); |
ad5f2e85 GL |
80 | if (ret) |
81 | return ret; | |
e55222ef | 82 | |
ad5f2e85 | 83 | /* limit format to hardware capabilities */ |
b8d9904c | 84 | ret = ici->ops->try_fmt_cap(icd, f); |
e55222ef GL |
85 | |
86 | /* calculate missing fields */ | |
87 | f->fmt.pix.field = field; | |
88 | f->fmt.pix.bytesperline = | |
89 | (f->fmt.pix.width * fmt->depth) >> 3; | |
90 | f->fmt.pix.sizeimage = | |
91 | f->fmt.pix.height * f->fmt.pix.bytesperline; | |
92 | ||
93 | return ret; | |
94 | } | |
95 | ||
96 | static int soc_camera_enum_input(struct file *file, void *priv, | |
97 | struct v4l2_input *inp) | |
98 | { | |
99 | if (inp->index != 0) | |
100 | return -EINVAL; | |
101 | ||
102 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
103 | inp->std = V4L2_STD_UNKNOWN; | |
104 | strcpy(inp->name, "Camera"); | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i) | |
110 | { | |
111 | *i = 0; | |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
116 | static int soc_camera_s_input(struct file *file, void *priv, unsigned int i) | |
117 | { | |
118 | if (i > 0) | |
119 | return -EINVAL; | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a) | |
125 | { | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static int soc_camera_reqbufs(struct file *file, void *priv, | |
130 | struct v4l2_requestbuffers *p) | |
131 | { | |
132 | int ret; | |
133 | struct soc_camera_file *icf = file->private_data; | |
134 | struct soc_camera_device *icd = icf->icd; | |
135 | struct soc_camera_host *ici = | |
136 | to_soc_camera_host(icd->dev.parent); | |
137 | ||
138 | WARN_ON(priv != file->private_data); | |
139 | ||
7e28adb2 | 140 | dev_dbg(&icd->dev, "%s: %d\n", __func__, p->memory); |
e55222ef GL |
141 | |
142 | ret = videobuf_reqbufs(&icf->vb_vidq, p); | |
143 | if (ret < 0) | |
144 | return ret; | |
145 | ||
b8d9904c | 146 | return ici->ops->reqbufs(icf, p); |
e55222ef GL |
147 | } |
148 | ||
149 | static int soc_camera_querybuf(struct file *file, void *priv, | |
150 | struct v4l2_buffer *p) | |
151 | { | |
152 | struct soc_camera_file *icf = file->private_data; | |
153 | ||
154 | WARN_ON(priv != file->private_data); | |
155 | ||
156 | return videobuf_querybuf(&icf->vb_vidq, p); | |
157 | } | |
158 | ||
159 | static int soc_camera_qbuf(struct file *file, void *priv, | |
160 | struct v4l2_buffer *p) | |
161 | { | |
162 | struct soc_camera_file *icf = file->private_data; | |
163 | ||
164 | WARN_ON(priv != file->private_data); | |
165 | ||
166 | return videobuf_qbuf(&icf->vb_vidq, p); | |
167 | } | |
168 | ||
169 | static int soc_camera_dqbuf(struct file *file, void *priv, | |
170 | struct v4l2_buffer *p) | |
171 | { | |
172 | struct soc_camera_file *icf = file->private_data; | |
173 | ||
174 | WARN_ON(priv != file->private_data); | |
175 | ||
176 | return videobuf_dqbuf(&icf->vb_vidq, p, file->f_flags & O_NONBLOCK); | |
177 | } | |
178 | ||
179 | static int soc_camera_open(struct inode *inode, struct file *file) | |
180 | { | |
9dc4e48f GL |
181 | struct video_device *vdev; |
182 | struct soc_camera_device *icd; | |
183 | struct soc_camera_host *ici; | |
e55222ef | 184 | struct soc_camera_file *icf; |
1a0063a9 | 185 | spinlock_t *lock; |
e55222ef GL |
186 | int ret; |
187 | ||
188 | icf = vmalloc(sizeof(*icf)); | |
189 | if (!icf) | |
190 | return -ENOMEM; | |
191 | ||
9dc4e48f GL |
192 | /* Protect against icd->remove() until we module_get() both drivers. */ |
193 | mutex_lock(&video_lock); | |
194 | ||
195 | vdev = video_devdata(file); | |
196 | icd = container_of(vdev->dev, struct soc_camera_device, dev); | |
197 | ici = to_soc_camera_host(icd->dev.parent); | |
e55222ef GL |
198 | |
199 | if (!try_module_get(icd->ops->owner)) { | |
200 | dev_err(&icd->dev, "Couldn't lock sensor driver.\n"); | |
201 | ret = -EINVAL; | |
202 | goto emgd; | |
203 | } | |
204 | ||
b8d9904c | 205 | if (!try_module_get(ici->ops->owner)) { |
e55222ef GL |
206 | dev_err(&icd->dev, "Couldn't lock capture bus driver.\n"); |
207 | ret = -EINVAL; | |
208 | goto emgi; | |
209 | } | |
210 | ||
9dc4e48f GL |
211 | icf->icd = icd; |
212 | ||
1a0063a9 GL |
213 | icf->lock = ici->ops->spinlock_alloc(icf); |
214 | if (!icf->lock) { | |
215 | ret = -ENOMEM; | |
216 | goto esla; | |
217 | } | |
218 | ||
219 | icd->use_count++; | |
220 | ||
9dc4e48f GL |
221 | /* Now we really have to activate the camera */ |
222 | if (icd->use_count == 1) { | |
b8d9904c | 223 | ret = ici->ops->add(icd); |
9dc4e48f GL |
224 | if (ret < 0) { |
225 | dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret); | |
226 | icd->use_count--; | |
227 | goto eiciadd; | |
228 | } | |
229 | } | |
230 | ||
231 | mutex_unlock(&video_lock); | |
232 | ||
e55222ef GL |
233 | file->private_data = icf; |
234 | dev_dbg(&icd->dev, "camera device open\n"); | |
235 | ||
236 | /* We must pass NULL as dev pointer, then all pci_* dma operations | |
1a0063a9 GL |
237 | * transform to normal dma_* ones. */ |
238 | videobuf_queue_sg_init(&icf->vb_vidq, ici->vbq_ops, NULL, icf->lock, | |
e55222ef GL |
239 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, |
240 | ici->msize, icd); | |
241 | ||
242 | return 0; | |
243 | ||
9dc4e48f GL |
244 | /* All errors are entered with the video_lock held */ |
245 | eiciadd: | |
1a0063a9 GL |
246 | lock = icf->lock; |
247 | icf->lock = NULL; | |
248 | if (ici->ops->spinlock_free) | |
249 | ici->ops->spinlock_free(lock); | |
250 | esla: | |
b8d9904c | 251 | module_put(ici->ops->owner); |
e55222ef GL |
252 | emgi: |
253 | module_put(icd->ops->owner); | |
254 | emgd: | |
9dc4e48f | 255 | mutex_unlock(&video_lock); |
e55222ef GL |
256 | vfree(icf); |
257 | return ret; | |
258 | } | |
259 | ||
260 | static int soc_camera_close(struct inode *inode, struct file *file) | |
261 | { | |
262 | struct soc_camera_file *icf = file->private_data; | |
263 | struct soc_camera_device *icd = icf->icd; | |
264 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
265 | struct video_device *vdev = icd->vdev; | |
1a0063a9 | 266 | spinlock_t *lock = icf->lock; |
e55222ef | 267 | |
9dc4e48f GL |
268 | mutex_lock(&video_lock); |
269 | icd->use_count--; | |
270 | if (!icd->use_count) | |
b8d9904c | 271 | ici->ops->remove(icd); |
1a0063a9 GL |
272 | icf->lock = NULL; |
273 | if (ici->ops->spinlock_free) | |
274 | ici->ops->spinlock_free(lock); | |
e55222ef | 275 | module_put(icd->ops->owner); |
b8d9904c | 276 | module_put(ici->ops->owner); |
9dc4e48f GL |
277 | mutex_unlock(&video_lock); |
278 | ||
1a0063a9 | 279 | vfree(icf); |
e55222ef GL |
280 | |
281 | dev_dbg(vdev->dev, "camera device close\n"); | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
aba360d8 | 286 | static ssize_t soc_camera_read(struct file *file, char __user *buf, |
e55222ef GL |
287 | size_t count, loff_t *ppos) |
288 | { | |
289 | struct soc_camera_file *icf = file->private_data; | |
290 | struct soc_camera_device *icd = icf->icd; | |
291 | struct video_device *vdev = icd->vdev; | |
292 | int err = -EINVAL; | |
293 | ||
294 | dev_err(vdev->dev, "camera device read not implemented\n"); | |
295 | ||
296 | return err; | |
297 | } | |
298 | ||
299 | static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) | |
300 | { | |
301 | struct soc_camera_file *icf = file->private_data; | |
302 | struct soc_camera_device *icd = icf->icd; | |
303 | int err; | |
304 | ||
305 | dev_dbg(&icd->dev, "mmap called, vma=0x%08lx\n", (unsigned long)vma); | |
306 | ||
307 | err = videobuf_mmap_mapper(&icf->vb_vidq, vma); | |
308 | ||
309 | dev_dbg(&icd->dev, "vma start=0x%08lx, size=%ld, ret=%d\n", | |
310 | (unsigned long)vma->vm_start, | |
311 | (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, | |
312 | err); | |
313 | ||
314 | return err; | |
315 | } | |
316 | ||
317 | static unsigned int soc_camera_poll(struct file *file, poll_table *pt) | |
318 | { | |
319 | struct soc_camera_file *icf = file->private_data; | |
320 | struct soc_camera_device *icd = icf->icd; | |
321 | struct soc_camera_host *ici = | |
322 | to_soc_camera_host(icd->dev.parent); | |
323 | ||
324 | if (list_empty(&icf->vb_vidq.stream)) { | |
325 | dev_err(&icd->dev, "Trying to poll with no queued buffers!\n"); | |
326 | return POLLERR; | |
327 | } | |
328 | ||
b8d9904c | 329 | return ici->ops->poll(file, pt); |
e55222ef GL |
330 | } |
331 | ||
332 | ||
333 | static struct file_operations soc_camera_fops = { | |
334 | .owner = THIS_MODULE, | |
335 | .open = soc_camera_open, | |
336 | .release = soc_camera_close, | |
337 | .ioctl = video_ioctl2, | |
338 | .read = soc_camera_read, | |
339 | .mmap = soc_camera_mmap, | |
340 | .poll = soc_camera_poll, | |
341 | .llseek = no_llseek, | |
342 | }; | |
343 | ||
344 | ||
345 | static int soc_camera_s_fmt_cap(struct file *file, void *priv, | |
346 | struct v4l2_format *f) | |
347 | { | |
348 | struct soc_camera_file *icf = file->private_data; | |
349 | struct soc_camera_device *icd = icf->icd; | |
350 | struct soc_camera_host *ici = | |
351 | to_soc_camera_host(icd->dev.parent); | |
352 | int ret; | |
353 | struct v4l2_rect rect; | |
354 | const static struct soc_camera_data_format *data_fmt; | |
355 | ||
356 | WARN_ON(priv != file->private_data); | |
357 | ||
358 | data_fmt = format_by_fourcc(icd, f->fmt.pix.pixelformat); | |
359 | if (!data_fmt) | |
360 | return -EINVAL; | |
361 | ||
ad5f2e85 GL |
362 | /* buswidth may be further adjusted by the ici */ |
363 | icd->buswidth = data_fmt->depth; | |
e55222ef GL |
364 | |
365 | ret = soc_camera_try_fmt_cap(file, icf, f); | |
366 | if (ret < 0) | |
367 | return ret; | |
368 | ||
369 | rect.left = icd->x_current; | |
370 | rect.top = icd->y_current; | |
371 | rect.width = f->fmt.pix.width; | |
372 | rect.height = f->fmt.pix.height; | |
b8d9904c | 373 | ret = ici->ops->set_fmt_cap(icd, f->fmt.pix.pixelformat, &rect); |
ad5f2e85 GL |
374 | if (ret < 0) |
375 | return ret; | |
e55222ef | 376 | |
ad5f2e85 GL |
377 | icd->current_fmt = data_fmt; |
378 | icd->width = rect.width; | |
379 | icd->height = rect.height; | |
380 | icf->vb_vidq.field = f->fmt.pix.field; | |
381 | if (V4L2_BUF_TYPE_VIDEO_CAPTURE != f->type) | |
382 | dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n", | |
383 | f->type); | |
e55222ef | 384 | |
ad5f2e85 GL |
385 | dev_dbg(&icd->dev, "set width: %d height: %d\n", |
386 | icd->width, icd->height); | |
387 | ||
388 | /* set physical bus parameters */ | |
b8d9904c | 389 | return ici->ops->set_bus_param(icd, f->fmt.pix.pixelformat); |
e55222ef GL |
390 | } |
391 | ||
392 | static int soc_camera_enum_fmt_cap(struct file *file, void *priv, | |
393 | struct v4l2_fmtdesc *f) | |
394 | { | |
395 | struct soc_camera_file *icf = file->private_data; | |
396 | struct soc_camera_device *icd = icf->icd; | |
397 | const struct soc_camera_data_format *format; | |
398 | ||
399 | WARN_ON(priv != file->private_data); | |
400 | ||
26f1b942 | 401 | if (f->index >= icd->num_formats) |
e55222ef GL |
402 | return -EINVAL; |
403 | ||
26f1b942 | 404 | format = &icd->formats[f->index]; |
e55222ef GL |
405 | |
406 | strlcpy(f->description, format->name, sizeof(f->description)); | |
407 | f->pixelformat = format->fourcc; | |
408 | return 0; | |
409 | } | |
410 | ||
411 | static int soc_camera_g_fmt_cap(struct file *file, void *priv, | |
412 | struct v4l2_format *f) | |
413 | { | |
414 | struct soc_camera_file *icf = file->private_data; | |
415 | struct soc_camera_device *icd = icf->icd; | |
416 | ||
417 | WARN_ON(priv != file->private_data); | |
418 | ||
419 | f->fmt.pix.width = icd->width; | |
420 | f->fmt.pix.height = icd->height; | |
421 | f->fmt.pix.field = icf->vb_vidq.field; | |
422 | f->fmt.pix.pixelformat = icd->current_fmt->fourcc; | |
423 | f->fmt.pix.bytesperline = | |
424 | (f->fmt.pix.width * icd->current_fmt->depth) >> 3; | |
425 | f->fmt.pix.sizeimage = | |
426 | f->fmt.pix.height * f->fmt.pix.bytesperline; | |
427 | dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n", | |
428 | icd->current_fmt->fourcc); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | static int soc_camera_querycap(struct file *file, void *priv, | |
433 | struct v4l2_capability *cap) | |
434 | { | |
435 | struct soc_camera_file *icf = file->private_data; | |
436 | struct soc_camera_device *icd = icf->icd; | |
437 | struct soc_camera_host *ici = | |
438 | to_soc_camera_host(icd->dev.parent); | |
439 | ||
440 | WARN_ON(priv != file->private_data); | |
441 | ||
442 | strlcpy(cap->driver, ici->drv_name, sizeof(cap->driver)); | |
b8d9904c | 443 | return ici->ops->querycap(ici, cap); |
e55222ef GL |
444 | } |
445 | ||
446 | static int soc_camera_streamon(struct file *file, void *priv, | |
447 | enum v4l2_buf_type i) | |
448 | { | |
449 | struct soc_camera_file *icf = file->private_data; | |
450 | struct soc_camera_device *icd = icf->icd; | |
451 | ||
452 | WARN_ON(priv != file->private_data); | |
453 | ||
7e28adb2 | 454 | dev_dbg(&icd->dev, "%s\n", __func__); |
e55222ef GL |
455 | |
456 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
457 | return -EINVAL; | |
458 | ||
459 | icd->ops->start_capture(icd); | |
460 | ||
461 | /* This calls buf_queue from host driver's videobuf_queue_ops */ | |
462 | return videobuf_streamon(&icf->vb_vidq); | |
463 | } | |
464 | ||
465 | static int soc_camera_streamoff(struct file *file, void *priv, | |
466 | enum v4l2_buf_type i) | |
467 | { | |
468 | struct soc_camera_file *icf = file->private_data; | |
469 | struct soc_camera_device *icd = icf->icd; | |
470 | ||
471 | WARN_ON(priv != file->private_data); | |
472 | ||
7e28adb2 | 473 | dev_dbg(&icd->dev, "%s\n", __func__); |
e55222ef GL |
474 | |
475 | if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
476 | return -EINVAL; | |
477 | ||
478 | /* This calls buf_release from host driver's videobuf_queue_ops for all | |
479 | * remaining buffers. When the last buffer is freed, stop capture */ | |
480 | videobuf_streamoff(&icf->vb_vidq); | |
481 | ||
482 | icd->ops->stop_capture(icd); | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static int soc_camera_queryctrl(struct file *file, void *priv, | |
488 | struct v4l2_queryctrl *qc) | |
489 | { | |
490 | struct soc_camera_file *icf = file->private_data; | |
491 | struct soc_camera_device *icd = icf->icd; | |
492 | int i; | |
493 | ||
494 | WARN_ON(priv != file->private_data); | |
495 | ||
496 | if (!qc->id) | |
497 | return -EINVAL; | |
498 | ||
499 | for (i = 0; i < icd->ops->num_controls; i++) | |
500 | if (qc->id == icd->ops->controls[i].id) { | |
501 | memcpy(qc, &(icd->ops->controls[i]), | |
502 | sizeof(*qc)); | |
503 | return 0; | |
504 | } | |
505 | ||
506 | return -EINVAL; | |
507 | } | |
508 | ||
509 | static int soc_camera_g_ctrl(struct file *file, void *priv, | |
510 | struct v4l2_control *ctrl) | |
511 | { | |
512 | struct soc_camera_file *icf = file->private_data; | |
513 | struct soc_camera_device *icd = icf->icd; | |
514 | ||
515 | WARN_ON(priv != file->private_data); | |
516 | ||
517 | switch (ctrl->id) { | |
518 | case V4L2_CID_GAIN: | |
519 | if (icd->gain == (unsigned short)~0) | |
520 | return -EINVAL; | |
521 | ctrl->value = icd->gain; | |
522 | return 0; | |
523 | case V4L2_CID_EXPOSURE: | |
524 | if (icd->exposure == (unsigned short)~0) | |
525 | return -EINVAL; | |
526 | ctrl->value = icd->exposure; | |
527 | return 0; | |
528 | } | |
529 | ||
530 | if (icd->ops->get_control) | |
531 | return icd->ops->get_control(icd, ctrl); | |
532 | return -EINVAL; | |
533 | } | |
534 | ||
535 | static int soc_camera_s_ctrl(struct file *file, void *priv, | |
536 | struct v4l2_control *ctrl) | |
537 | { | |
538 | struct soc_camera_file *icf = file->private_data; | |
539 | struct soc_camera_device *icd = icf->icd; | |
540 | ||
541 | WARN_ON(priv != file->private_data); | |
542 | ||
543 | if (icd->ops->set_control) | |
544 | return icd->ops->set_control(icd, ctrl); | |
545 | return -EINVAL; | |
546 | } | |
547 | ||
548 | static int soc_camera_cropcap(struct file *file, void *fh, | |
549 | struct v4l2_cropcap *a) | |
550 | { | |
551 | struct soc_camera_file *icf = file->private_data; | |
552 | struct soc_camera_device *icd = icf->icd; | |
553 | ||
554 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
555 | a->bounds.left = icd->x_min; | |
556 | a->bounds.top = icd->y_min; | |
557 | a->bounds.width = icd->width_max; | |
558 | a->bounds.height = icd->height_max; | |
559 | a->defrect.left = icd->x_min; | |
560 | a->defrect.top = icd->y_min; | |
561 | a->defrect.width = 640; | |
562 | a->defrect.height = 480; | |
563 | a->pixelaspect.numerator = 1; | |
564 | a->pixelaspect.denominator = 1; | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static int soc_camera_g_crop(struct file *file, void *fh, | |
570 | struct v4l2_crop *a) | |
571 | { | |
572 | struct soc_camera_file *icf = file->private_data; | |
573 | struct soc_camera_device *icd = icf->icd; | |
574 | ||
575 | a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
576 | a->c.left = icd->x_current; | |
577 | a->c.top = icd->y_current; | |
578 | a->c.width = icd->width; | |
579 | a->c.height = icd->height; | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | static int soc_camera_s_crop(struct file *file, void *fh, | |
585 | struct v4l2_crop *a) | |
586 | { | |
587 | struct soc_camera_file *icf = file->private_data; | |
588 | struct soc_camera_device *icd = icf->icd; | |
589 | struct soc_camera_host *ici = | |
590 | to_soc_camera_host(icd->dev.parent); | |
591 | int ret; | |
592 | ||
593 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
594 | return -EINVAL; | |
595 | ||
b8d9904c | 596 | ret = ici->ops->set_fmt_cap(icd, 0, &a->c); |
e55222ef GL |
597 | if (!ret) { |
598 | icd->width = a->c.width; | |
599 | icd->height = a->c.height; | |
600 | icd->x_current = a->c.left; | |
601 | icd->y_current = a->c.top; | |
602 | } | |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
607 | static int soc_camera_g_chip_ident(struct file *file, void *fh, | |
608 | struct v4l2_chip_ident *id) | |
609 | { | |
610 | struct soc_camera_file *icf = file->private_data; | |
611 | struct soc_camera_device *icd = icf->icd; | |
612 | ||
613 | if (!icd->ops->get_chip_id) | |
614 | return -EINVAL; | |
615 | ||
616 | return icd->ops->get_chip_id(icd, id); | |
617 | } | |
618 | ||
619 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
620 | static int soc_camera_g_register(struct file *file, void *fh, | |
621 | struct v4l2_register *reg) | |
622 | { | |
623 | struct soc_camera_file *icf = file->private_data; | |
624 | struct soc_camera_device *icd = icf->icd; | |
625 | ||
626 | if (!icd->ops->get_register) | |
627 | return -EINVAL; | |
628 | ||
629 | return icd->ops->get_register(icd, reg); | |
630 | } | |
631 | ||
632 | static int soc_camera_s_register(struct file *file, void *fh, | |
633 | struct v4l2_register *reg) | |
634 | { | |
635 | struct soc_camera_file *icf = file->private_data; | |
636 | struct soc_camera_device *icd = icf->icd; | |
637 | ||
638 | if (!icd->ops->set_register) | |
639 | return -EINVAL; | |
640 | ||
641 | return icd->ops->set_register(icd, reg); | |
642 | } | |
643 | #endif | |
644 | ||
645 | static int device_register_link(struct soc_camera_device *icd) | |
646 | { | |
647 | int ret = device_register(&icd->dev); | |
648 | ||
649 | if (ret < 0) { | |
650 | /* Prevent calling device_unregister() */ | |
651 | icd->dev.parent = NULL; | |
652 | dev_err(&icd->dev, "Cannot register device: %d\n", ret); | |
653 | /* Even if probe() was unsuccessful for all registered drivers, | |
654 | * device_register() returns 0, and we add the link, just to | |
655 | * document this camera's control device */ | |
656 | } else if (icd->control) | |
657 | /* Have to sysfs_remove_link() before device_unregister()? */ | |
658 | if (sysfs_create_link(&icd->dev.kobj, &icd->control->kobj, | |
659 | "control")) | |
660 | dev_warn(&icd->dev, | |
661 | "Failed creating the control symlink\n"); | |
662 | return ret; | |
663 | } | |
664 | ||
665 | /* So far this function cannot fail */ | |
666 | static void scan_add_host(struct soc_camera_host *ici) | |
667 | { | |
668 | struct soc_camera_device *icd; | |
669 | ||
670 | mutex_lock(&list_lock); | |
671 | ||
672 | list_for_each_entry(icd, &devices, list) { | |
673 | if (icd->iface == ici->nr) { | |
674 | icd->dev.parent = &ici->dev; | |
675 | device_register_link(icd); | |
676 | } | |
677 | } | |
678 | ||
679 | mutex_unlock(&list_lock); | |
680 | } | |
681 | ||
682 | /* return: 0 if no match found or a match found and | |
683 | * device_register() successful, error code otherwise */ | |
684 | static int scan_add_device(struct soc_camera_device *icd) | |
685 | { | |
686 | struct soc_camera_host *ici; | |
687 | int ret = 0; | |
688 | ||
689 | mutex_lock(&list_lock); | |
690 | ||
691 | list_add_tail(&icd->list, &devices); | |
692 | ||
693 | /* Watch out for class_for_each_device / class_find_device API by | |
694 | * Dave Young <hidave.darkstar@gmail.com> */ | |
695 | list_for_each_entry(ici, &hosts, list) { | |
696 | if (icd->iface == ici->nr) { | |
697 | ret = 1; | |
698 | icd->dev.parent = &ici->dev; | |
699 | break; | |
700 | } | |
701 | } | |
702 | ||
703 | mutex_unlock(&list_lock); | |
704 | ||
705 | if (ret) | |
706 | ret = device_register_link(icd); | |
707 | ||
708 | return ret; | |
709 | } | |
710 | ||
711 | static int soc_camera_probe(struct device *dev) | |
712 | { | |
713 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
714 | struct soc_camera_host *ici = | |
715 | to_soc_camera_host(icd->dev.parent); | |
716 | int ret; | |
717 | ||
26f1b942 | 718 | if (!icd->ops->probe) |
e55222ef GL |
719 | return -ENODEV; |
720 | ||
9dc4e48f GL |
721 | /* We only call ->add() here to activate and probe the camera. |
722 | * We shall ->remove() and deactivate it immediately afterwards. */ | |
b8d9904c | 723 | ret = ici->ops->add(icd); |
e55222ef GL |
724 | if (ret < 0) |
725 | return ret; | |
726 | ||
26f1b942 | 727 | ret = icd->ops->probe(icd); |
9dc4e48f | 728 | if (ret >= 0) { |
e55222ef GL |
729 | const struct v4l2_queryctrl *qctrl; |
730 | ||
731 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_GAIN); | |
732 | icd->gain = qctrl ? qctrl->default_value : (unsigned short)~0; | |
733 | qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); | |
734 | icd->exposure = qctrl ? qctrl->default_value : | |
735 | (unsigned short)~0; | |
736 | } | |
b8d9904c | 737 | ici->ops->remove(icd); |
e55222ef GL |
738 | |
739 | return ret; | |
740 | } | |
741 | ||
742 | /* This is called on device_unregister, which only means we have to disconnect | |
743 | * from the host, but not remove ourselves from the device list */ | |
744 | static int soc_camera_remove(struct device *dev) | |
745 | { | |
746 | struct soc_camera_device *icd = to_soc_camera_dev(dev); | |
e55222ef | 747 | |
26f1b942 GL |
748 | if (icd->ops->remove) |
749 | icd->ops->remove(icd); | |
e55222ef | 750 | |
e55222ef GL |
751 | return 0; |
752 | } | |
753 | ||
754 | static struct bus_type soc_camera_bus_type = { | |
755 | .name = "soc-camera", | |
756 | .probe = soc_camera_probe, | |
757 | .remove = soc_camera_remove, | |
758 | }; | |
759 | ||
760 | static struct device_driver ic_drv = { | |
761 | .name = "camera", | |
762 | .bus = &soc_camera_bus_type, | |
763 | .owner = THIS_MODULE, | |
764 | }; | |
765 | ||
e55222ef GL |
766 | static void dummy_release(struct device *dev) |
767 | { | |
768 | } | |
769 | ||
1a0063a9 GL |
770 | static spinlock_t *spinlock_alloc(struct soc_camera_file *icf) |
771 | { | |
772 | spinlock_t *lock = kmalloc(sizeof(spinlock_t), GFP_KERNEL); | |
773 | ||
774 | if (lock) | |
775 | spin_lock_init(lock); | |
776 | ||
777 | return lock; | |
778 | } | |
779 | ||
780 | static void spinlock_free(spinlock_t *lock) | |
781 | { | |
782 | kfree(lock); | |
783 | } | |
784 | ||
b8d9904c | 785 | int soc_camera_host_register(struct soc_camera_host *ici) |
e55222ef GL |
786 | { |
787 | int ret; | |
788 | struct soc_camera_host *ix; | |
789 | ||
b8d9904c | 790 | if (!ici->vbq_ops || !ici->ops->add || !ici->ops->remove) |
e55222ef GL |
791 | return -EINVAL; |
792 | ||
793 | /* Number might be equal to the platform device ID */ | |
794 | sprintf(ici->dev.bus_id, "camera_host%d", ici->nr); | |
e55222ef GL |
795 | |
796 | mutex_lock(&list_lock); | |
797 | list_for_each_entry(ix, &hosts, list) { | |
798 | if (ix->nr == ici->nr) { | |
799 | mutex_unlock(&list_lock); | |
800 | return -EBUSY; | |
801 | } | |
802 | } | |
803 | ||
804 | list_add_tail(&ici->list, &hosts); | |
805 | mutex_unlock(&list_lock); | |
806 | ||
e55222ef GL |
807 | ici->dev.release = dummy_release; |
808 | ||
809 | ret = device_register(&ici->dev); | |
810 | ||
811 | if (ret) | |
812 | goto edevr; | |
813 | ||
1a0063a9 GL |
814 | if (!ici->ops->spinlock_alloc) { |
815 | ici->ops->spinlock_alloc = spinlock_alloc; | |
816 | ici->ops->spinlock_free = spinlock_free; | |
817 | } | |
818 | ||
e55222ef GL |
819 | scan_add_host(ici); |
820 | ||
821 | return 0; | |
822 | ||
823 | edevr: | |
824 | mutex_lock(&list_lock); | |
825 | list_del(&ici->list); | |
826 | mutex_unlock(&list_lock); | |
827 | ||
828 | return ret; | |
829 | } | |
830 | EXPORT_SYMBOL(soc_camera_host_register); | |
831 | ||
832 | /* Unregister all clients! */ | |
833 | void soc_camera_host_unregister(struct soc_camera_host *ici) | |
834 | { | |
835 | struct soc_camera_device *icd; | |
836 | ||
837 | mutex_lock(&list_lock); | |
838 | ||
839 | list_del(&ici->list); | |
840 | ||
841 | list_for_each_entry(icd, &devices, list) { | |
842 | if (icd->dev.parent == &ici->dev) { | |
843 | device_unregister(&icd->dev); | |
844 | /* Not before device_unregister(), .remove | |
b8d9904c | 845 | * needs parent to call ici->ops->remove() */ |
e55222ef GL |
846 | icd->dev.parent = NULL; |
847 | memset(&icd->dev.kobj, 0, sizeof(icd->dev.kobj)); | |
848 | } | |
849 | } | |
850 | ||
851 | mutex_unlock(&list_lock); | |
852 | ||
853 | device_unregister(&ici->dev); | |
854 | } | |
855 | EXPORT_SYMBOL(soc_camera_host_unregister); | |
856 | ||
857 | /* Image capture device */ | |
858 | int soc_camera_device_register(struct soc_camera_device *icd) | |
859 | { | |
860 | struct soc_camera_device *ix; | |
861 | int num = -1, i; | |
862 | ||
863 | if (!icd) | |
864 | return -EINVAL; | |
865 | ||
866 | for (i = 0; i < 256 && num < 0; i++) { | |
867 | num = i; | |
868 | list_for_each_entry(ix, &devices, list) { | |
869 | if (ix->iface == icd->iface && ix->devnum == i) { | |
870 | num = -1; | |
871 | break; | |
872 | } | |
873 | } | |
874 | } | |
875 | ||
876 | if (num < 0) | |
877 | /* ok, we have 256 cameras on this host... | |
878 | * man, stay reasonable... */ | |
879 | return -ENOMEM; | |
880 | ||
881 | icd->devnum = num; | |
882 | icd->dev.bus = &soc_camera_bus_type; | |
883 | snprintf(icd->dev.bus_id, sizeof(icd->dev.bus_id), | |
884 | "%u-%u", icd->iface, icd->devnum); | |
885 | ||
886 | icd->dev.release = dummy_release; | |
887 | ||
e55222ef GL |
888 | return scan_add_device(icd); |
889 | } | |
890 | EXPORT_SYMBOL(soc_camera_device_register); | |
891 | ||
892 | void soc_camera_device_unregister(struct soc_camera_device *icd) | |
893 | { | |
894 | mutex_lock(&list_lock); | |
895 | list_del(&icd->list); | |
896 | ||
897 | /* The bus->remove will be eventually called */ | |
898 | if (icd->dev.parent) | |
899 | device_unregister(&icd->dev); | |
900 | mutex_unlock(&list_lock); | |
901 | } | |
902 | EXPORT_SYMBOL(soc_camera_device_unregister); | |
903 | ||
904 | int soc_camera_video_start(struct soc_camera_device *icd) | |
905 | { | |
906 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
907 | int err = -ENOMEM; | |
908 | struct video_device *vdev; | |
909 | ||
910 | if (!icd->dev.parent) | |
911 | return -ENODEV; | |
912 | ||
913 | vdev = video_device_alloc(); | |
914 | if (!vdev) | |
915 | goto evidallocd; | |
916 | dev_dbg(&ici->dev, "Allocated video_device %p\n", vdev); | |
917 | ||
918 | strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name)); | |
919 | /* Maybe better &ici->dev */ | |
920 | vdev->dev = &icd->dev; | |
921 | vdev->type = VID_TYPE_CAPTURE; | |
922 | vdev->current_norm = V4L2_STD_UNKNOWN; | |
923 | vdev->fops = &soc_camera_fops; | |
924 | vdev->release = video_device_release; | |
925 | vdev->minor = -1; | |
926 | vdev->tvnorms = V4L2_STD_UNKNOWN, | |
927 | vdev->vidioc_querycap = soc_camera_querycap; | |
928 | vdev->vidioc_g_fmt_cap = soc_camera_g_fmt_cap; | |
929 | vdev->vidioc_enum_fmt_cap = soc_camera_enum_fmt_cap; | |
930 | vdev->vidioc_s_fmt_cap = soc_camera_s_fmt_cap; | |
931 | vdev->vidioc_enum_input = soc_camera_enum_input; | |
932 | vdev->vidioc_g_input = soc_camera_g_input; | |
933 | vdev->vidioc_s_input = soc_camera_s_input; | |
934 | vdev->vidioc_s_std = soc_camera_s_std; | |
935 | vdev->vidioc_reqbufs = soc_camera_reqbufs; | |
936 | vdev->vidioc_try_fmt_cap = soc_camera_try_fmt_cap; | |
937 | vdev->vidioc_querybuf = soc_camera_querybuf; | |
938 | vdev->vidioc_qbuf = soc_camera_qbuf; | |
939 | vdev->vidioc_dqbuf = soc_camera_dqbuf; | |
940 | vdev->vidioc_streamon = soc_camera_streamon; | |
941 | vdev->vidioc_streamoff = soc_camera_streamoff; | |
942 | vdev->vidioc_queryctrl = soc_camera_queryctrl; | |
943 | vdev->vidioc_g_ctrl = soc_camera_g_ctrl; | |
944 | vdev->vidioc_s_ctrl = soc_camera_s_ctrl; | |
945 | vdev->vidioc_cropcap = soc_camera_cropcap; | |
946 | vdev->vidioc_g_crop = soc_camera_g_crop; | |
947 | vdev->vidioc_s_crop = soc_camera_s_crop; | |
948 | vdev->vidioc_g_chip_ident = soc_camera_g_chip_ident; | |
949 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
950 | vdev->vidioc_g_register = soc_camera_g_register; | |
951 | vdev->vidioc_s_register = soc_camera_s_register; | |
952 | #endif | |
953 | ||
26f1b942 | 954 | icd->current_fmt = &icd->formats[0]; |
e55222ef GL |
955 | |
956 | err = video_register_device(vdev, VFL_TYPE_GRABBER, vdev->minor); | |
957 | if (err < 0) { | |
958 | dev_err(vdev->dev, "video_register_device failed\n"); | |
959 | goto evidregd; | |
960 | } | |
961 | icd->vdev = vdev; | |
962 | ||
963 | return 0; | |
964 | ||
965 | evidregd: | |
966 | video_device_release(vdev); | |
967 | evidallocd: | |
968 | return err; | |
969 | } | |
970 | EXPORT_SYMBOL(soc_camera_video_start); | |
971 | ||
972 | void soc_camera_video_stop(struct soc_camera_device *icd) | |
973 | { | |
974 | struct video_device *vdev = icd->vdev; | |
975 | ||
7e28adb2 | 976 | dev_dbg(&icd->dev, "%s\n", __func__); |
e55222ef GL |
977 | |
978 | if (!icd->dev.parent || !vdev) | |
979 | return; | |
980 | ||
981 | mutex_lock(&video_lock); | |
982 | video_unregister_device(vdev); | |
983 | icd->vdev = NULL; | |
984 | mutex_unlock(&video_lock); | |
985 | } | |
986 | EXPORT_SYMBOL(soc_camera_video_stop); | |
987 | ||
988 | static int __init soc_camera_init(void) | |
989 | { | |
990 | int ret = bus_register(&soc_camera_bus_type); | |
991 | if (ret) | |
992 | return ret; | |
993 | ret = driver_register(&ic_drv); | |
994 | if (ret) | |
995 | goto edrvr; | |
e55222ef GL |
996 | |
997 | return 0; | |
998 | ||
e55222ef GL |
999 | edrvr: |
1000 | bus_unregister(&soc_camera_bus_type); | |
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | static void __exit soc_camera_exit(void) | |
1005 | { | |
e55222ef GL |
1006 | driver_unregister(&ic_drv); |
1007 | bus_unregister(&soc_camera_bus_type); | |
1008 | } | |
1009 | ||
1010 | module_init(soc_camera_init); | |
1011 | module_exit(soc_camera_exit); | |
1012 | ||
1013 | MODULE_DESCRIPTION("Image capture bus driver"); | |
1014 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1015 | MODULE_LICENSE("GPL"); |