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9eae42e5 RR |
1 | /* |
2 | * timblogiw.c timberdale FPGA LogiWin Video In driver | |
3 | * Copyright (c) 2009-2010 Intel Corporation | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* Supports: | |
20 | * Timberdale FPGA LogiWin Video In | |
21 | */ | |
22 | ||
23 | #include <linux/version.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/dmaengine.h> | |
27 | #include <linux/scatterlist.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/list.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <media/v4l2-ioctl.h> | |
32 | #include <media/v4l2-device.h> | |
33 | #include <media/videobuf-dma-contig.h> | |
34 | #include <media/timb_video.h> | |
35 | ||
36 | #define DRIVER_NAME "timb-video" | |
37 | ||
38 | #define TIMBLOGIWIN_NAME "Timberdale Video-In" | |
39 | #define TIMBLOGIW_VERSION_CODE 0x04 | |
40 | ||
41 | #define TIMBLOGIW_LINES_PER_DESC 44 | |
42 | #define TIMBLOGIW_MAX_VIDEO_MEM 16 | |
43 | ||
44 | #define TIMBLOGIW_HAS_DECODER(lw) (lw->pdata.encoder.module_name) | |
45 | ||
46 | ||
47 | struct timblogiw { | |
48 | struct video_device video_dev; | |
49 | struct v4l2_device v4l2_dev; /* mutual exclusion */ | |
50 | struct mutex lock; | |
51 | struct device *dev; | |
52 | struct timb_video_platform_data pdata; | |
53 | struct v4l2_subdev *sd_enc; /* encoder */ | |
54 | bool opened; | |
55 | }; | |
56 | ||
57 | struct timblogiw_tvnorm { | |
58 | v4l2_std_id std; | |
59 | u16 width; | |
60 | u16 height; | |
61 | u8 fps; | |
62 | }; | |
63 | ||
64 | struct timblogiw_fh { | |
65 | struct videobuf_queue vb_vidq; | |
66 | struct timblogiw_tvnorm const *cur_norm; | |
67 | struct list_head capture; | |
68 | struct dma_chan *chan; | |
69 | spinlock_t queue_lock; /* mutual exclusion */ | |
70 | unsigned int frame_count; | |
71 | }; | |
72 | ||
73 | struct timblogiw_buffer { | |
74 | /* common v4l buffer stuff -- must be first */ | |
75 | struct videobuf_buffer vb; | |
76 | struct scatterlist sg[16]; | |
77 | dma_cookie_t cookie; | |
78 | struct timblogiw_fh *fh; | |
79 | }; | |
80 | ||
81 | const struct timblogiw_tvnorm timblogiw_tvnorms[] = { | |
82 | { | |
83 | .std = V4L2_STD_PAL, | |
84 | .width = 720, | |
85 | .height = 576, | |
86 | .fps = 25 | |
87 | }, | |
88 | { | |
89 | .std = V4L2_STD_NTSC, | |
90 | .width = 720, | |
91 | .height = 480, | |
92 | .fps = 30 | |
93 | } | |
94 | }; | |
95 | ||
96 | static int timblogiw_bytes_per_line(const struct timblogiw_tvnorm *norm) | |
97 | { | |
98 | return norm->width * 2; | |
99 | } | |
100 | ||
101 | ||
102 | static int timblogiw_frame_size(const struct timblogiw_tvnorm *norm) | |
103 | { | |
104 | return norm->height * timblogiw_bytes_per_line(norm); | |
105 | } | |
106 | ||
107 | static const struct timblogiw_tvnorm *timblogiw_get_norm(const v4l2_std_id std) | |
108 | { | |
109 | int i; | |
110 | for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++) | |
111 | if (timblogiw_tvnorms[i].std & std) | |
112 | return timblogiw_tvnorms + i; | |
113 | ||
114 | /* default to first element */ | |
115 | return timblogiw_tvnorms; | |
116 | } | |
117 | ||
118 | static void timblogiw_dma_cb(void *data) | |
119 | { | |
120 | struct timblogiw_buffer *buf = data; | |
121 | struct timblogiw_fh *fh = buf->fh; | |
122 | struct videobuf_buffer *vb = &buf->vb; | |
123 | ||
124 | spin_lock(&fh->queue_lock); | |
125 | ||
126 | /* mark the transfer done */ | |
127 | buf->cookie = -1; | |
128 | ||
129 | fh->frame_count++; | |
130 | ||
131 | if (vb->state != VIDEOBUF_ERROR) { | |
132 | list_del(&vb->queue); | |
133 | do_gettimeofday(&vb->ts); | |
134 | vb->field_count = fh->frame_count * 2; | |
135 | vb->state = VIDEOBUF_DONE; | |
136 | ||
137 | wake_up(&vb->done); | |
138 | } | |
139 | ||
140 | if (!list_empty(&fh->capture)) { | |
141 | vb = list_entry(fh->capture.next, struct videobuf_buffer, | |
142 | queue); | |
143 | vb->state = VIDEOBUF_ACTIVE; | |
144 | } | |
145 | ||
146 | spin_unlock(&fh->queue_lock); | |
147 | } | |
148 | ||
149 | static bool timblogiw_dma_filter_fn(struct dma_chan *chan, void *filter_param) | |
150 | { | |
151 | return chan->chan_id == (int)filter_param; | |
152 | } | |
153 | ||
154 | /* IOCTL functions */ | |
155 | ||
156 | static int timblogiw_g_fmt(struct file *file, void *priv, | |
157 | struct v4l2_format *format) | |
158 | { | |
159 | struct video_device *vdev = video_devdata(file); | |
160 | struct timblogiw *lw = video_get_drvdata(vdev); | |
161 | struct timblogiw_fh *fh = priv; | |
162 | ||
163 | dev_dbg(&vdev->dev, "%s entry\n", __func__); | |
164 | ||
165 | if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
166 | return -EINVAL; | |
167 | ||
168 | mutex_lock(&lw->lock); | |
169 | ||
170 | format->fmt.pix.width = fh->cur_norm->width; | |
171 | format->fmt.pix.height = fh->cur_norm->height; | |
172 | format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY; | |
173 | format->fmt.pix.bytesperline = timblogiw_bytes_per_line(fh->cur_norm); | |
174 | format->fmt.pix.sizeimage = timblogiw_frame_size(fh->cur_norm); | |
175 | format->fmt.pix.field = V4L2_FIELD_NONE; | |
176 | ||
177 | mutex_unlock(&lw->lock); | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static int timblogiw_try_fmt(struct file *file, void *priv, | |
183 | struct v4l2_format *format) | |
184 | { | |
185 | struct video_device *vdev = video_devdata(file); | |
186 | struct v4l2_pix_format *pix = &format->fmt.pix; | |
187 | ||
188 | dev_dbg(&vdev->dev, | |
189 | "%s - width=%d, height=%d, pixelformat=%d, field=%d\n" | |
190 | "bytes per line %d, size image: %d, colorspace: %d\n", | |
191 | __func__, | |
192 | pix->width, pix->height, pix->pixelformat, pix->field, | |
193 | pix->bytesperline, pix->sizeimage, pix->colorspace); | |
194 | ||
195 | if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
196 | return -EINVAL; | |
197 | ||
198 | if (pix->field != V4L2_FIELD_NONE) | |
199 | return -EINVAL; | |
200 | ||
201 | if (pix->pixelformat != V4L2_PIX_FMT_UYVY) | |
202 | return -EINVAL; | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | static int timblogiw_s_fmt(struct file *file, void *priv, | |
208 | struct v4l2_format *format) | |
209 | { | |
210 | struct video_device *vdev = video_devdata(file); | |
211 | struct timblogiw *lw = video_get_drvdata(vdev); | |
212 | struct timblogiw_fh *fh = priv; | |
213 | struct v4l2_pix_format *pix = &format->fmt.pix; | |
214 | int err; | |
215 | ||
216 | mutex_lock(&lw->lock); | |
217 | ||
218 | err = timblogiw_try_fmt(file, priv, format); | |
219 | if (err) | |
220 | goto out; | |
221 | ||
222 | if (videobuf_queue_is_busy(&fh->vb_vidq)) { | |
223 | dev_err(&vdev->dev, "%s queue busy\n", __func__); | |
224 | err = -EBUSY; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | pix->width = fh->cur_norm->width; | |
229 | pix->height = fh->cur_norm->height; | |
230 | ||
231 | out: | |
232 | mutex_unlock(&lw->lock); | |
233 | return err; | |
234 | } | |
235 | ||
236 | static int timblogiw_querycap(struct file *file, void *priv, | |
237 | struct v4l2_capability *cap) | |
238 | { | |
239 | struct video_device *vdev = video_devdata(file); | |
240 | ||
241 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
242 | memset(cap, 0, sizeof(*cap)); | |
243 | strncpy(cap->card, TIMBLOGIWIN_NAME, sizeof(cap->card)-1); | |
244 | strncpy(cap->driver, DRIVER_NAME, sizeof(cap->card)-1); | |
245 | strlcpy(cap->bus_info, vdev->name, sizeof(cap->bus_info)); | |
246 | cap->version = TIMBLOGIW_VERSION_CODE; | |
247 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | | |
248 | V4L2_CAP_READWRITE; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static int timblogiw_enum_fmt(struct file *file, void *priv, | |
254 | struct v4l2_fmtdesc *fmt) | |
255 | { | |
256 | struct video_device *vdev = video_devdata(file); | |
257 | ||
258 | dev_dbg(&vdev->dev, "%s, index: %d\n", __func__, fmt->index); | |
259 | ||
260 | if (fmt->index != 0) | |
261 | return -EINVAL; | |
262 | memset(fmt, 0, sizeof(*fmt)); | |
263 | fmt->index = 0; | |
264 | fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
265 | strncpy(fmt->description, "4:2:2, packed, YUYV", | |
266 | sizeof(fmt->description)-1); | |
267 | fmt->pixelformat = V4L2_PIX_FMT_UYVY; | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | static int timblogiw_g_parm(struct file *file, void *priv, | |
273 | struct v4l2_streamparm *sp) | |
274 | { | |
275 | struct timblogiw_fh *fh = priv; | |
276 | struct v4l2_captureparm *cp = &sp->parm.capture; | |
277 | ||
278 | cp->capability = V4L2_CAP_TIMEPERFRAME; | |
279 | cp->timeperframe.numerator = 1; | |
280 | cp->timeperframe.denominator = fh->cur_norm->fps; | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static int timblogiw_reqbufs(struct file *file, void *priv, | |
286 | struct v4l2_requestbuffers *rb) | |
287 | { | |
288 | struct video_device *vdev = video_devdata(file); | |
289 | struct timblogiw_fh *fh = priv; | |
290 | ||
291 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
292 | ||
293 | return videobuf_reqbufs(&fh->vb_vidq, rb); | |
294 | } | |
295 | ||
296 | static int timblogiw_querybuf(struct file *file, void *priv, | |
297 | struct v4l2_buffer *b) | |
298 | { | |
299 | struct video_device *vdev = video_devdata(file); | |
300 | struct timblogiw_fh *fh = priv; | |
301 | ||
302 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
303 | ||
304 | return videobuf_querybuf(&fh->vb_vidq, b); | |
305 | } | |
306 | ||
307 | static int timblogiw_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) | |
308 | { | |
309 | struct video_device *vdev = video_devdata(file); | |
310 | struct timblogiw_fh *fh = priv; | |
311 | ||
312 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
313 | ||
314 | return videobuf_qbuf(&fh->vb_vidq, b); | |
315 | } | |
316 | ||
317 | static int timblogiw_dqbuf(struct file *file, void *priv, | |
318 | struct v4l2_buffer *b) | |
319 | { | |
320 | struct video_device *vdev = video_devdata(file); | |
321 | struct timblogiw_fh *fh = priv; | |
322 | ||
323 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
324 | ||
325 | return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK); | |
326 | } | |
327 | ||
328 | static int timblogiw_g_std(struct file *file, void *priv, v4l2_std_id *std) | |
329 | { | |
330 | struct video_device *vdev = video_devdata(file); | |
331 | struct timblogiw_fh *fh = priv; | |
332 | ||
333 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
334 | ||
335 | *std = fh->cur_norm->std; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | static int timblogiw_s_std(struct file *file, void *priv, v4l2_std_id *std) | |
340 | { | |
341 | struct video_device *vdev = video_devdata(file); | |
342 | struct timblogiw *lw = video_get_drvdata(vdev); | |
343 | struct timblogiw_fh *fh = priv; | |
344 | int err = 0; | |
345 | ||
346 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
347 | ||
348 | mutex_lock(&lw->lock); | |
349 | ||
350 | if (TIMBLOGIW_HAS_DECODER(lw)) | |
351 | err = v4l2_subdev_call(lw->sd_enc, core, s_std, *std); | |
352 | ||
353 | if (!err) | |
354 | fh->cur_norm = timblogiw_get_norm(*std); | |
355 | ||
356 | mutex_unlock(&lw->lock); | |
357 | ||
358 | return err; | |
359 | } | |
360 | ||
361 | static int timblogiw_enuminput(struct file *file, void *priv, | |
362 | struct v4l2_input *inp) | |
363 | { | |
364 | struct video_device *vdev = video_devdata(file); | |
365 | int i; | |
366 | ||
367 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
368 | ||
369 | if (inp->index != 0) | |
370 | return -EINVAL; | |
371 | ||
372 | memset(inp, 0, sizeof(*inp)); | |
373 | inp->index = 0; | |
374 | ||
375 | strncpy(inp->name, "Timb input 1", sizeof(inp->name) - 1); | |
376 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
377 | ||
378 | inp->std = 0; | |
379 | for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++) | |
380 | inp->std |= timblogiw_tvnorms[i].std; | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | static int timblogiw_g_input(struct file *file, void *priv, | |
386 | unsigned int *input) | |
387 | { | |
388 | struct video_device *vdev = video_devdata(file); | |
389 | ||
390 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
391 | ||
392 | *input = 0; | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | static int timblogiw_s_input(struct file *file, void *priv, unsigned int input) | |
398 | { | |
399 | struct video_device *vdev = video_devdata(file); | |
400 | ||
401 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
402 | ||
403 | if (input != 0) | |
404 | return -EINVAL; | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static int timblogiw_streamon(struct file *file, void *priv, unsigned int type) | |
409 | { | |
410 | struct video_device *vdev = video_devdata(file); | |
411 | struct timblogiw_fh *fh = priv; | |
412 | ||
413 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
414 | ||
415 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
416 | dev_dbg(&vdev->dev, "%s - No capture device\n", __func__); | |
417 | return -EINVAL; | |
418 | } | |
419 | ||
420 | fh->frame_count = 0; | |
421 | return videobuf_streamon(&fh->vb_vidq); | |
422 | } | |
423 | ||
424 | static int timblogiw_streamoff(struct file *file, void *priv, | |
425 | unsigned int type) | |
426 | { | |
427 | struct video_device *vdev = video_devdata(file); | |
428 | struct timblogiw_fh *fh = priv; | |
429 | ||
430 | dev_dbg(&vdev->dev, "%s entry\n", __func__); | |
431 | ||
432 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
433 | return -EINVAL; | |
434 | ||
435 | return videobuf_streamoff(&fh->vb_vidq); | |
436 | } | |
437 | ||
438 | static int timblogiw_querystd(struct file *file, void *priv, v4l2_std_id *std) | |
439 | { | |
440 | struct video_device *vdev = video_devdata(file); | |
441 | struct timblogiw *lw = video_get_drvdata(vdev); | |
442 | struct timblogiw_fh *fh = priv; | |
443 | ||
444 | dev_dbg(&vdev->dev, "%s entry\n", __func__); | |
445 | ||
446 | if (TIMBLOGIW_HAS_DECODER(lw)) | |
447 | return v4l2_subdev_call(lw->sd_enc, video, querystd, std); | |
448 | else { | |
449 | *std = fh->cur_norm->std; | |
450 | return 0; | |
451 | } | |
452 | } | |
453 | ||
454 | static int timblogiw_enum_framesizes(struct file *file, void *priv, | |
455 | struct v4l2_frmsizeenum *fsize) | |
456 | { | |
457 | struct video_device *vdev = video_devdata(file); | |
458 | struct timblogiw_fh *fh = priv; | |
459 | ||
460 | dev_dbg(&vdev->dev, "%s - index: %d, format: %d\n", __func__, | |
461 | fsize->index, fsize->pixel_format); | |
462 | ||
463 | if ((fsize->index != 0) || | |
464 | (fsize->pixel_format != V4L2_PIX_FMT_UYVY)) | |
465 | return -EINVAL; | |
466 | ||
467 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
468 | fsize->discrete.width = fh->cur_norm->width; | |
469 | fsize->discrete.height = fh->cur_norm->height; | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | /* Video buffer functions */ | |
475 | ||
476 | static int buffer_setup(struct videobuf_queue *vq, unsigned int *count, | |
477 | unsigned int *size) | |
478 | { | |
479 | struct timblogiw_fh *fh = vq->priv_data; | |
480 | ||
481 | *size = timblogiw_frame_size(fh->cur_norm); | |
482 | ||
483 | if (!*count) | |
484 | *count = 32; | |
485 | ||
486 | while (*size * *count > TIMBLOGIW_MAX_VIDEO_MEM * 1024 * 1024) | |
487 | (*count)--; | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, | |
493 | enum v4l2_field field) | |
494 | { | |
495 | struct timblogiw_fh *fh = vq->priv_data; | |
496 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
497 | vb); | |
498 | unsigned int data_size = timblogiw_frame_size(fh->cur_norm); | |
499 | int err = 0; | |
500 | ||
501 | if (vb->baddr && vb->bsize < data_size) | |
502 | /* User provided buffer, but it is too small */ | |
503 | return -ENOMEM; | |
504 | ||
505 | vb->size = data_size; | |
506 | vb->width = fh->cur_norm->width; | |
507 | vb->height = fh->cur_norm->height; | |
508 | vb->field = field; | |
509 | ||
510 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
511 | int i; | |
512 | unsigned int size; | |
513 | unsigned int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * | |
514 | timblogiw_bytes_per_line(fh->cur_norm); | |
515 | dma_addr_t addr; | |
516 | ||
517 | sg_init_table(buf->sg, ARRAY_SIZE(buf->sg)); | |
518 | ||
519 | err = videobuf_iolock(vq, vb, NULL); | |
520 | if (err) | |
521 | goto err; | |
522 | ||
523 | addr = videobuf_to_dma_contig(vb); | |
524 | for (i = 0, size = 0; size < data_size; i++) { | |
525 | sg_dma_address(buf->sg + i) = addr + size; | |
526 | size += bytes_per_desc; | |
527 | sg_dma_len(buf->sg + i) = (size > data_size) ? | |
528 | (bytes_per_desc - (size - data_size)) : | |
529 | bytes_per_desc; | |
530 | } | |
531 | ||
532 | vb->state = VIDEOBUF_PREPARED; | |
533 | buf->cookie = -1; | |
534 | buf->fh = fh; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | ||
539 | err: | |
540 | videobuf_dma_contig_free(vq, vb); | |
541 | vb->state = VIDEOBUF_NEEDS_INIT; | |
542 | return err; | |
543 | } | |
544 | ||
545 | static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
546 | { | |
547 | struct timblogiw_fh *fh = vq->priv_data; | |
548 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
549 | vb); | |
550 | struct dma_async_tx_descriptor *desc; | |
551 | int sg_elems; | |
552 | int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * | |
553 | timblogiw_bytes_per_line(fh->cur_norm); | |
554 | ||
555 | sg_elems = timblogiw_frame_size(fh->cur_norm) / bytes_per_desc; | |
556 | sg_elems += | |
557 | (timblogiw_frame_size(fh->cur_norm) % bytes_per_desc) ? 1 : 0; | |
558 | ||
559 | if (list_empty(&fh->capture)) | |
560 | vb->state = VIDEOBUF_ACTIVE; | |
561 | else | |
562 | vb->state = VIDEOBUF_QUEUED; | |
563 | ||
564 | list_add_tail(&vb->queue, &fh->capture); | |
565 | ||
566 | spin_unlock_irq(&fh->queue_lock); | |
567 | ||
568 | desc = fh->chan->device->device_prep_slave_sg(fh->chan, | |
569 | buf->sg, sg_elems, DMA_FROM_DEVICE, | |
570 | DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP); | |
571 | if (!desc) { | |
572 | spin_lock_irq(&fh->queue_lock); | |
573 | list_del_init(&vb->queue); | |
574 | vb->state = VIDEOBUF_PREPARED; | |
575 | return; | |
576 | } | |
577 | ||
578 | desc->callback_param = buf; | |
579 | desc->callback = timblogiw_dma_cb; | |
580 | ||
581 | buf->cookie = desc->tx_submit(desc); | |
582 | ||
583 | spin_lock_irq(&fh->queue_lock); | |
584 | } | |
585 | ||
586 | static void buffer_release(struct videobuf_queue *vq, | |
587 | struct videobuf_buffer *vb) | |
588 | { | |
589 | struct timblogiw_fh *fh = vq->priv_data; | |
590 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
591 | vb); | |
592 | ||
593 | videobuf_waiton(vq, vb, 0, 0); | |
594 | if (buf->cookie >= 0) | |
595 | dma_sync_wait(fh->chan, buf->cookie); | |
596 | ||
597 | videobuf_dma_contig_free(vq, vb); | |
598 | vb->state = VIDEOBUF_NEEDS_INIT; | |
599 | } | |
600 | ||
601 | static struct videobuf_queue_ops timblogiw_video_qops = { | |
602 | .buf_setup = buffer_setup, | |
603 | .buf_prepare = buffer_prepare, | |
604 | .buf_queue = buffer_queue, | |
605 | .buf_release = buffer_release, | |
606 | }; | |
607 | ||
608 | /* Device Operations functions */ | |
609 | ||
610 | static int timblogiw_open(struct file *file) | |
611 | { | |
612 | struct video_device *vdev = video_devdata(file); | |
613 | struct timblogiw *lw = video_get_drvdata(vdev); | |
614 | struct timblogiw_fh *fh; | |
615 | v4l2_std_id std; | |
616 | dma_cap_mask_t mask; | |
617 | int err = 0; | |
618 | ||
619 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
620 | ||
621 | mutex_lock(&lw->lock); | |
622 | if (lw->opened) { | |
623 | err = -EBUSY; | |
624 | goto out; | |
625 | } | |
626 | ||
627 | if (TIMBLOGIW_HAS_DECODER(lw) && !lw->sd_enc) { | |
628 | struct i2c_adapter *adapt; | |
629 | ||
630 | /* find the video decoder */ | |
631 | adapt = i2c_get_adapter(lw->pdata.i2c_adapter); | |
632 | if (!adapt) { | |
633 | dev_err(&vdev->dev, "No I2C bus #%d\n", | |
634 | lw->pdata.i2c_adapter); | |
635 | err = -ENODEV; | |
636 | goto out; | |
637 | } | |
638 | ||
639 | /* now find the encoder */ | |
640 | lw->sd_enc = v4l2_i2c_new_subdev_board(&lw->v4l2_dev, adapt, | |
641 | lw->pdata.encoder.info, NULL); | |
642 | ||
643 | i2c_put_adapter(adapt); | |
644 | ||
645 | if (!lw->sd_enc) { | |
646 | dev_err(&vdev->dev, "Failed to get encoder: %s\n", | |
647 | lw->pdata.encoder.module_name); | |
648 | err = -ENODEV; | |
649 | goto out; | |
650 | } | |
651 | } | |
652 | ||
653 | fh = kzalloc(sizeof(*fh), GFP_KERNEL); | |
654 | if (!fh) { | |
655 | err = -ENOMEM; | |
656 | goto out; | |
657 | } | |
658 | ||
659 | fh->cur_norm = timblogiw_tvnorms; | |
660 | timblogiw_querystd(file, fh, &std); | |
661 | fh->cur_norm = timblogiw_get_norm(std); | |
662 | ||
663 | INIT_LIST_HEAD(&fh->capture); | |
664 | spin_lock_init(&fh->queue_lock); | |
665 | ||
666 | dma_cap_zero(mask); | |
667 | dma_cap_set(DMA_SLAVE, mask); | |
668 | dma_cap_set(DMA_PRIVATE, mask); | |
669 | ||
670 | /* find the DMA channel */ | |
671 | fh->chan = dma_request_channel(mask, timblogiw_dma_filter_fn, | |
672 | (void *)lw->pdata.dma_channel); | |
673 | if (!fh->chan) { | |
674 | dev_err(&vdev->dev, "Failed to get DMA channel\n"); | |
675 | kfree(fh); | |
676 | err = -ENODEV; | |
677 | goto out; | |
678 | } | |
679 | ||
680 | file->private_data = fh; | |
681 | videobuf_queue_dma_contig_init(&fh->vb_vidq, | |
682 | &timblogiw_video_qops, lw->dev, &fh->queue_lock, | |
683 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, | |
684 | sizeof(struct timblogiw_buffer), fh, NULL); | |
685 | ||
686 | lw->opened = true; | |
687 | out: | |
688 | mutex_unlock(&lw->lock); | |
689 | ||
690 | return err; | |
691 | } | |
692 | ||
693 | static int timblogiw_close(struct file *file) | |
694 | { | |
695 | struct video_device *vdev = video_devdata(file); | |
696 | struct timblogiw *lw = video_get_drvdata(vdev); | |
697 | struct timblogiw_fh *fh = file->private_data; | |
698 | ||
699 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
700 | ||
701 | videobuf_stop(&fh->vb_vidq); | |
702 | videobuf_mmap_free(&fh->vb_vidq); | |
703 | ||
704 | dma_release_channel(fh->chan); | |
705 | ||
706 | kfree(fh); | |
707 | ||
708 | mutex_lock(&lw->lock); | |
709 | lw->opened = false; | |
710 | mutex_unlock(&lw->lock); | |
711 | return 0; | |
712 | } | |
713 | ||
714 | static ssize_t timblogiw_read(struct file *file, char __user *data, | |
715 | size_t count, loff_t *ppos) | |
716 | { | |
717 | struct video_device *vdev = video_devdata(file); | |
718 | struct timblogiw_fh *fh = file->private_data; | |
719 | ||
720 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
721 | ||
722 | return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0, | |
723 | file->f_flags & O_NONBLOCK); | |
724 | } | |
725 | ||
726 | static unsigned int timblogiw_poll(struct file *file, | |
727 | struct poll_table_struct *wait) | |
728 | { | |
729 | struct video_device *vdev = video_devdata(file); | |
730 | struct timblogiw_fh *fh = file->private_data; | |
731 | ||
732 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
733 | ||
734 | return videobuf_poll_stream(file, &fh->vb_vidq, wait); | |
735 | } | |
736 | ||
737 | static int timblogiw_mmap(struct file *file, struct vm_area_struct *vma) | |
738 | { | |
739 | struct video_device *vdev = video_devdata(file); | |
740 | struct timblogiw_fh *fh = file->private_data; | |
741 | ||
742 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
743 | ||
744 | return videobuf_mmap_mapper(&fh->vb_vidq, vma); | |
745 | } | |
746 | ||
747 | /* Platform device functions */ | |
748 | ||
749 | static const __devinitdata struct v4l2_ioctl_ops timblogiw_ioctl_ops = { | |
750 | .vidioc_querycap = timblogiw_querycap, | |
751 | .vidioc_enum_fmt_vid_cap = timblogiw_enum_fmt, | |
752 | .vidioc_g_fmt_vid_cap = timblogiw_g_fmt, | |
753 | .vidioc_try_fmt_vid_cap = timblogiw_try_fmt, | |
754 | .vidioc_s_fmt_vid_cap = timblogiw_s_fmt, | |
755 | .vidioc_g_parm = timblogiw_g_parm, | |
756 | .vidioc_reqbufs = timblogiw_reqbufs, | |
757 | .vidioc_querybuf = timblogiw_querybuf, | |
758 | .vidioc_qbuf = timblogiw_qbuf, | |
759 | .vidioc_dqbuf = timblogiw_dqbuf, | |
760 | .vidioc_g_std = timblogiw_g_std, | |
761 | .vidioc_s_std = timblogiw_s_std, | |
762 | .vidioc_enum_input = timblogiw_enuminput, | |
763 | .vidioc_g_input = timblogiw_g_input, | |
764 | .vidioc_s_input = timblogiw_s_input, | |
765 | .vidioc_streamon = timblogiw_streamon, | |
766 | .vidioc_streamoff = timblogiw_streamoff, | |
767 | .vidioc_querystd = timblogiw_querystd, | |
768 | .vidioc_enum_framesizes = timblogiw_enum_framesizes, | |
769 | }; | |
770 | ||
771 | static const __devinitdata struct v4l2_file_operations timblogiw_fops = { | |
772 | .owner = THIS_MODULE, | |
773 | .open = timblogiw_open, | |
774 | .release = timblogiw_close, | |
775 | .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ | |
776 | .mmap = timblogiw_mmap, | |
777 | .read = timblogiw_read, | |
778 | .poll = timblogiw_poll, | |
779 | }; | |
780 | ||
781 | static const __devinitdata struct video_device timblogiw_template = { | |
782 | .name = TIMBLOGIWIN_NAME, | |
783 | .fops = &timblogiw_fops, | |
784 | .ioctl_ops = &timblogiw_ioctl_ops, | |
785 | .release = video_device_release_empty, | |
786 | .minor = -1, | |
787 | .tvnorms = V4L2_STD_PAL | V4L2_STD_NTSC | |
788 | }; | |
789 | ||
790 | static int __devinit timblogiw_probe(struct platform_device *pdev) | |
791 | { | |
792 | int err; | |
793 | struct timblogiw *lw = NULL; | |
794 | struct timb_video_platform_data *pdata = pdev->dev.platform_data; | |
795 | ||
796 | if (!pdata) { | |
797 | dev_err(&pdev->dev, "No platform data\n"); | |
798 | err = -EINVAL; | |
799 | goto err; | |
800 | } | |
801 | ||
802 | if (!pdata->encoder.module_name) | |
803 | dev_info(&pdev->dev, "Running without decoder\n"); | |
804 | ||
805 | lw = kzalloc(sizeof(*lw), GFP_KERNEL); | |
806 | if (!lw) { | |
807 | err = -ENOMEM; | |
808 | goto err; | |
809 | } | |
810 | ||
811 | if (pdev->dev.parent) | |
812 | lw->dev = pdev->dev.parent; | |
813 | else | |
814 | lw->dev = &pdev->dev; | |
815 | ||
816 | memcpy(&lw->pdata, pdata, sizeof(lw->pdata)); | |
817 | ||
818 | mutex_init(&lw->lock); | |
819 | ||
820 | lw->video_dev = timblogiw_template; | |
821 | ||
822 | strlcpy(lw->v4l2_dev.name, DRIVER_NAME, sizeof(lw->v4l2_dev.name)); | |
823 | err = v4l2_device_register(NULL, &lw->v4l2_dev); | |
824 | if (err) | |
825 | goto err_register; | |
826 | ||
827 | lw->video_dev.v4l2_dev = &lw->v4l2_dev; | |
828 | ||
829 | platform_set_drvdata(pdev, lw); | |
830 | video_set_drvdata(&lw->video_dev, lw); | |
831 | ||
832 | err = video_register_device(&lw->video_dev, VFL_TYPE_GRABBER, 0); | |
833 | if (err) { | |
834 | dev_err(&pdev->dev, "Error reg video: %d\n", err); | |
835 | goto err_request; | |
836 | } | |
837 | ||
838 | ||
839 | return 0; | |
840 | ||
841 | err_request: | |
842 | platform_set_drvdata(pdev, NULL); | |
843 | v4l2_device_unregister(&lw->v4l2_dev); | |
844 | err_register: | |
845 | kfree(lw); | |
846 | err: | |
847 | dev_err(&pdev->dev, "Failed to register: %d\n", err); | |
848 | ||
849 | return err; | |
850 | } | |
851 | ||
852 | static int __devexit timblogiw_remove(struct platform_device *pdev) | |
853 | { | |
854 | struct timblogiw *lw = platform_get_drvdata(pdev); | |
855 | ||
856 | video_unregister_device(&lw->video_dev); | |
857 | ||
858 | v4l2_device_unregister(&lw->v4l2_dev); | |
859 | ||
860 | kfree(lw); | |
861 | ||
862 | platform_set_drvdata(pdev, NULL); | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | static struct platform_driver timblogiw_platform_driver = { | |
868 | .driver = { | |
869 | .name = DRIVER_NAME, | |
870 | .owner = THIS_MODULE, | |
871 | }, | |
872 | .probe = timblogiw_probe, | |
873 | .remove = __devexit_p(timblogiw_remove), | |
874 | }; | |
875 | ||
876 | /* Module functions */ | |
877 | ||
878 | static int __init timblogiw_init(void) | |
879 | { | |
880 | return platform_driver_register(&timblogiw_platform_driver); | |
881 | } | |
882 | ||
883 | static void __exit timblogiw_exit(void) | |
884 | { | |
885 | platform_driver_unregister(&timblogiw_platform_driver); | |
886 | } | |
887 | ||
888 | module_init(timblogiw_init); | |
889 | module_exit(timblogiw_exit); | |
890 | ||
891 | MODULE_DESCRIPTION(TIMBLOGIWIN_NAME); | |
892 | MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>"); | |
893 | MODULE_LICENSE("GPL v2"); | |
894 | MODULE_ALIAS("platform:"DRIVER_NAME); |