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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 | ||
9eae42e5 RR |
23 | #include <linux/platform_device.h> |
24 | #include <linux/slab.h> | |
25 | #include <linux/dmaengine.h> | |
26 | #include <linux/scatterlist.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/list.h> | |
29 | #include <linux/i2c.h> | |
7a707b89 | 30 | #include <linux/module.h> |
9eae42e5 RR |
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 | { | |
61ea3aa5 | 151 | return chan->chan_id == (uintptr_t)filter_param; |
9eae42e5 RR |
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); | |
dcd745b7 | 244 | strncpy(cap->driver, DRIVER_NAME, sizeof(cap->driver) - 1); |
9eae42e5 RR |
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 | ||
9eae42e5 RR |
372 | inp->index = 0; |
373 | ||
374 | strncpy(inp->name, "Timb input 1", sizeof(inp->name) - 1); | |
375 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
376 | ||
377 | inp->std = 0; | |
378 | for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++) | |
379 | inp->std |= timblogiw_tvnorms[i].std; | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int timblogiw_g_input(struct file *file, void *priv, | |
385 | unsigned int *input) | |
386 | { | |
387 | struct video_device *vdev = video_devdata(file); | |
388 | ||
389 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
390 | ||
391 | *input = 0; | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static int timblogiw_s_input(struct file *file, void *priv, unsigned int input) | |
397 | { | |
398 | struct video_device *vdev = video_devdata(file); | |
399 | ||
400 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
401 | ||
402 | if (input != 0) | |
403 | return -EINVAL; | |
404 | return 0; | |
405 | } | |
406 | ||
407 | static int timblogiw_streamon(struct file *file, void *priv, unsigned int type) | |
408 | { | |
409 | struct video_device *vdev = video_devdata(file); | |
410 | struct timblogiw_fh *fh = priv; | |
411 | ||
412 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
413 | ||
414 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
415 | dev_dbg(&vdev->dev, "%s - No capture device\n", __func__); | |
416 | return -EINVAL; | |
417 | } | |
418 | ||
419 | fh->frame_count = 0; | |
420 | return videobuf_streamon(&fh->vb_vidq); | |
421 | } | |
422 | ||
423 | static int timblogiw_streamoff(struct file *file, void *priv, | |
424 | unsigned int type) | |
425 | { | |
426 | struct video_device *vdev = video_devdata(file); | |
427 | struct timblogiw_fh *fh = priv; | |
428 | ||
429 | dev_dbg(&vdev->dev, "%s entry\n", __func__); | |
430 | ||
431 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
432 | return -EINVAL; | |
433 | ||
434 | return videobuf_streamoff(&fh->vb_vidq); | |
435 | } | |
436 | ||
437 | static int timblogiw_querystd(struct file *file, void *priv, v4l2_std_id *std) | |
438 | { | |
439 | struct video_device *vdev = video_devdata(file); | |
440 | struct timblogiw *lw = video_get_drvdata(vdev); | |
441 | struct timblogiw_fh *fh = priv; | |
442 | ||
443 | dev_dbg(&vdev->dev, "%s entry\n", __func__); | |
444 | ||
445 | if (TIMBLOGIW_HAS_DECODER(lw)) | |
446 | return v4l2_subdev_call(lw->sd_enc, video, querystd, std); | |
447 | else { | |
448 | *std = fh->cur_norm->std; | |
449 | return 0; | |
450 | } | |
451 | } | |
452 | ||
453 | static int timblogiw_enum_framesizes(struct file *file, void *priv, | |
454 | struct v4l2_frmsizeenum *fsize) | |
455 | { | |
456 | struct video_device *vdev = video_devdata(file); | |
457 | struct timblogiw_fh *fh = priv; | |
458 | ||
459 | dev_dbg(&vdev->dev, "%s - index: %d, format: %d\n", __func__, | |
460 | fsize->index, fsize->pixel_format); | |
461 | ||
462 | if ((fsize->index != 0) || | |
463 | (fsize->pixel_format != V4L2_PIX_FMT_UYVY)) | |
464 | return -EINVAL; | |
465 | ||
466 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
467 | fsize->discrete.width = fh->cur_norm->width; | |
468 | fsize->discrete.height = fh->cur_norm->height; | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | /* Video buffer functions */ | |
474 | ||
475 | static int buffer_setup(struct videobuf_queue *vq, unsigned int *count, | |
476 | unsigned int *size) | |
477 | { | |
478 | struct timblogiw_fh *fh = vq->priv_data; | |
479 | ||
480 | *size = timblogiw_frame_size(fh->cur_norm); | |
481 | ||
482 | if (!*count) | |
483 | *count = 32; | |
484 | ||
485 | while (*size * *count > TIMBLOGIW_MAX_VIDEO_MEM * 1024 * 1024) | |
486 | (*count)--; | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, | |
492 | enum v4l2_field field) | |
493 | { | |
494 | struct timblogiw_fh *fh = vq->priv_data; | |
495 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
496 | vb); | |
497 | unsigned int data_size = timblogiw_frame_size(fh->cur_norm); | |
498 | int err = 0; | |
499 | ||
500 | if (vb->baddr && vb->bsize < data_size) | |
501 | /* User provided buffer, but it is too small */ | |
502 | return -ENOMEM; | |
503 | ||
504 | vb->size = data_size; | |
505 | vb->width = fh->cur_norm->width; | |
506 | vb->height = fh->cur_norm->height; | |
507 | vb->field = field; | |
508 | ||
509 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
510 | int i; | |
511 | unsigned int size; | |
512 | unsigned int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * | |
513 | timblogiw_bytes_per_line(fh->cur_norm); | |
514 | dma_addr_t addr; | |
515 | ||
516 | sg_init_table(buf->sg, ARRAY_SIZE(buf->sg)); | |
517 | ||
518 | err = videobuf_iolock(vq, vb, NULL); | |
519 | if (err) | |
520 | goto err; | |
521 | ||
522 | addr = videobuf_to_dma_contig(vb); | |
523 | for (i = 0, size = 0; size < data_size; i++) { | |
524 | sg_dma_address(buf->sg + i) = addr + size; | |
525 | size += bytes_per_desc; | |
526 | sg_dma_len(buf->sg + i) = (size > data_size) ? | |
527 | (bytes_per_desc - (size - data_size)) : | |
528 | bytes_per_desc; | |
529 | } | |
530 | ||
531 | vb->state = VIDEOBUF_PREPARED; | |
532 | buf->cookie = -1; | |
533 | buf->fh = fh; | |
534 | } | |
535 | ||
536 | return 0; | |
537 | ||
538 | err: | |
539 | videobuf_dma_contig_free(vq, vb); | |
540 | vb->state = VIDEOBUF_NEEDS_INIT; | |
541 | return err; | |
542 | } | |
543 | ||
544 | static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
545 | { | |
546 | struct timblogiw_fh *fh = vq->priv_data; | |
547 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
548 | vb); | |
549 | struct dma_async_tx_descriptor *desc; | |
550 | int sg_elems; | |
551 | int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * | |
552 | timblogiw_bytes_per_line(fh->cur_norm); | |
553 | ||
554 | sg_elems = timblogiw_frame_size(fh->cur_norm) / bytes_per_desc; | |
555 | sg_elems += | |
556 | (timblogiw_frame_size(fh->cur_norm) % bytes_per_desc) ? 1 : 0; | |
557 | ||
558 | if (list_empty(&fh->capture)) | |
559 | vb->state = VIDEOBUF_ACTIVE; | |
560 | else | |
561 | vb->state = VIDEOBUF_QUEUED; | |
562 | ||
563 | list_add_tail(&vb->queue, &fh->capture); | |
564 | ||
565 | spin_unlock_irq(&fh->queue_lock); | |
566 | ||
567 | desc = fh->chan->device->device_prep_slave_sg(fh->chan, | |
568 | buf->sg, sg_elems, DMA_FROM_DEVICE, | |
569 | DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP); | |
570 | if (!desc) { | |
571 | spin_lock_irq(&fh->queue_lock); | |
572 | list_del_init(&vb->queue); | |
573 | vb->state = VIDEOBUF_PREPARED; | |
574 | return; | |
575 | } | |
576 | ||
577 | desc->callback_param = buf; | |
578 | desc->callback = timblogiw_dma_cb; | |
579 | ||
580 | buf->cookie = desc->tx_submit(desc); | |
581 | ||
582 | spin_lock_irq(&fh->queue_lock); | |
583 | } | |
584 | ||
585 | static void buffer_release(struct videobuf_queue *vq, | |
586 | struct videobuf_buffer *vb) | |
587 | { | |
588 | struct timblogiw_fh *fh = vq->priv_data; | |
589 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
590 | vb); | |
591 | ||
592 | videobuf_waiton(vq, vb, 0, 0); | |
593 | if (buf->cookie >= 0) | |
594 | dma_sync_wait(fh->chan, buf->cookie); | |
595 | ||
596 | videobuf_dma_contig_free(vq, vb); | |
597 | vb->state = VIDEOBUF_NEEDS_INIT; | |
598 | } | |
599 | ||
600 | static struct videobuf_queue_ops timblogiw_video_qops = { | |
601 | .buf_setup = buffer_setup, | |
602 | .buf_prepare = buffer_prepare, | |
603 | .buf_queue = buffer_queue, | |
604 | .buf_release = buffer_release, | |
605 | }; | |
606 | ||
607 | /* Device Operations functions */ | |
608 | ||
609 | static int timblogiw_open(struct file *file) | |
610 | { | |
611 | struct video_device *vdev = video_devdata(file); | |
612 | struct timblogiw *lw = video_get_drvdata(vdev); | |
613 | struct timblogiw_fh *fh; | |
614 | v4l2_std_id std; | |
615 | dma_cap_mask_t mask; | |
616 | int err = 0; | |
617 | ||
618 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
619 | ||
620 | mutex_lock(&lw->lock); | |
621 | if (lw->opened) { | |
622 | err = -EBUSY; | |
623 | goto out; | |
624 | } | |
625 | ||
626 | if (TIMBLOGIW_HAS_DECODER(lw) && !lw->sd_enc) { | |
627 | struct i2c_adapter *adapt; | |
628 | ||
629 | /* find the video decoder */ | |
630 | adapt = i2c_get_adapter(lw->pdata.i2c_adapter); | |
631 | if (!adapt) { | |
632 | dev_err(&vdev->dev, "No I2C bus #%d\n", | |
633 | lw->pdata.i2c_adapter); | |
634 | err = -ENODEV; | |
635 | goto out; | |
636 | } | |
637 | ||
638 | /* now find the encoder */ | |
639 | lw->sd_enc = v4l2_i2c_new_subdev_board(&lw->v4l2_dev, adapt, | |
640 | lw->pdata.encoder.info, NULL); | |
641 | ||
642 | i2c_put_adapter(adapt); | |
643 | ||
644 | if (!lw->sd_enc) { | |
645 | dev_err(&vdev->dev, "Failed to get encoder: %s\n", | |
646 | lw->pdata.encoder.module_name); | |
647 | err = -ENODEV; | |
648 | goto out; | |
649 | } | |
650 | } | |
651 | ||
652 | fh = kzalloc(sizeof(*fh), GFP_KERNEL); | |
653 | if (!fh) { | |
654 | err = -ENOMEM; | |
655 | goto out; | |
656 | } | |
657 | ||
658 | fh->cur_norm = timblogiw_tvnorms; | |
659 | timblogiw_querystd(file, fh, &std); | |
660 | fh->cur_norm = timblogiw_get_norm(std); | |
661 | ||
662 | INIT_LIST_HEAD(&fh->capture); | |
663 | spin_lock_init(&fh->queue_lock); | |
664 | ||
665 | dma_cap_zero(mask); | |
666 | dma_cap_set(DMA_SLAVE, mask); | |
667 | dma_cap_set(DMA_PRIVATE, mask); | |
668 | ||
669 | /* find the DMA channel */ | |
670 | fh->chan = dma_request_channel(mask, timblogiw_dma_filter_fn, | |
61ea3aa5 | 671 | (void *)(uintptr_t)lw->pdata.dma_channel); |
9eae42e5 RR |
672 | if (!fh->chan) { |
673 | dev_err(&vdev->dev, "Failed to get DMA channel\n"); | |
674 | kfree(fh); | |
675 | err = -ENODEV; | |
676 | goto out; | |
677 | } | |
678 | ||
679 | file->private_data = fh; | |
680 | videobuf_queue_dma_contig_init(&fh->vb_vidq, | |
681 | &timblogiw_video_qops, lw->dev, &fh->queue_lock, | |
682 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, | |
683 | sizeof(struct timblogiw_buffer), fh, NULL); | |
684 | ||
685 | lw->opened = true; | |
686 | out: | |
687 | mutex_unlock(&lw->lock); | |
688 | ||
689 | return err; | |
690 | } | |
691 | ||
692 | static int timblogiw_close(struct file *file) | |
693 | { | |
694 | struct video_device *vdev = video_devdata(file); | |
695 | struct timblogiw *lw = video_get_drvdata(vdev); | |
696 | struct timblogiw_fh *fh = file->private_data; | |
697 | ||
698 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
699 | ||
700 | videobuf_stop(&fh->vb_vidq); | |
701 | videobuf_mmap_free(&fh->vb_vidq); | |
702 | ||
703 | dma_release_channel(fh->chan); | |
704 | ||
705 | kfree(fh); | |
706 | ||
707 | mutex_lock(&lw->lock); | |
708 | lw->opened = false; | |
709 | mutex_unlock(&lw->lock); | |
710 | return 0; | |
711 | } | |
712 | ||
713 | static ssize_t timblogiw_read(struct file *file, char __user *data, | |
714 | size_t count, loff_t *ppos) | |
715 | { | |
716 | struct video_device *vdev = video_devdata(file); | |
717 | struct timblogiw_fh *fh = file->private_data; | |
718 | ||
719 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
720 | ||
721 | return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0, | |
722 | file->f_flags & O_NONBLOCK); | |
723 | } | |
724 | ||
725 | static unsigned int timblogiw_poll(struct file *file, | |
726 | struct poll_table_struct *wait) | |
727 | { | |
728 | struct video_device *vdev = video_devdata(file); | |
729 | struct timblogiw_fh *fh = file->private_data; | |
730 | ||
731 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
732 | ||
733 | return videobuf_poll_stream(file, &fh->vb_vidq, wait); | |
734 | } | |
735 | ||
736 | static int timblogiw_mmap(struct file *file, struct vm_area_struct *vma) | |
737 | { | |
738 | struct video_device *vdev = video_devdata(file); | |
739 | struct timblogiw_fh *fh = file->private_data; | |
740 | ||
741 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
742 | ||
743 | return videobuf_mmap_mapper(&fh->vb_vidq, vma); | |
744 | } | |
745 | ||
746 | /* Platform device functions */ | |
747 | ||
49aefd2b | 748 | static __devinitconst struct v4l2_ioctl_ops timblogiw_ioctl_ops = { |
9eae42e5 RR |
749 | .vidioc_querycap = timblogiw_querycap, |
750 | .vidioc_enum_fmt_vid_cap = timblogiw_enum_fmt, | |
751 | .vidioc_g_fmt_vid_cap = timblogiw_g_fmt, | |
752 | .vidioc_try_fmt_vid_cap = timblogiw_try_fmt, | |
753 | .vidioc_s_fmt_vid_cap = timblogiw_s_fmt, | |
754 | .vidioc_g_parm = timblogiw_g_parm, | |
755 | .vidioc_reqbufs = timblogiw_reqbufs, | |
756 | .vidioc_querybuf = timblogiw_querybuf, | |
757 | .vidioc_qbuf = timblogiw_qbuf, | |
758 | .vidioc_dqbuf = timblogiw_dqbuf, | |
759 | .vidioc_g_std = timblogiw_g_std, | |
760 | .vidioc_s_std = timblogiw_s_std, | |
761 | .vidioc_enum_input = timblogiw_enuminput, | |
762 | .vidioc_g_input = timblogiw_g_input, | |
763 | .vidioc_s_input = timblogiw_s_input, | |
764 | .vidioc_streamon = timblogiw_streamon, | |
765 | .vidioc_streamoff = timblogiw_streamoff, | |
766 | .vidioc_querystd = timblogiw_querystd, | |
767 | .vidioc_enum_framesizes = timblogiw_enum_framesizes, | |
768 | }; | |
769 | ||
49aefd2b | 770 | static __devinitconst struct v4l2_file_operations timblogiw_fops = { |
9eae42e5 RR |
771 | .owner = THIS_MODULE, |
772 | .open = timblogiw_open, | |
773 | .release = timblogiw_close, | |
774 | .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ | |
775 | .mmap = timblogiw_mmap, | |
776 | .read = timblogiw_read, | |
777 | .poll = timblogiw_poll, | |
778 | }; | |
779 | ||
49aefd2b | 780 | static __devinitconst struct video_device timblogiw_template = { |
9eae42e5 RR |
781 | .name = TIMBLOGIWIN_NAME, |
782 | .fops = &timblogiw_fops, | |
783 | .ioctl_ops = &timblogiw_ioctl_ops, | |
784 | .release = video_device_release_empty, | |
785 | .minor = -1, | |
786 | .tvnorms = V4L2_STD_PAL | V4L2_STD_NTSC | |
787 | }; | |
788 | ||
789 | static int __devinit timblogiw_probe(struct platform_device *pdev) | |
790 | { | |
791 | int err; | |
792 | struct timblogiw *lw = NULL; | |
3271d382 | 793 | struct timb_video_platform_data *pdata = pdev->dev.platform_data; |
9eae42e5 RR |
794 | |
795 | if (!pdata) { | |
796 | dev_err(&pdev->dev, "No platform data\n"); | |
797 | err = -EINVAL; | |
798 | goto err; | |
799 | } | |
800 | ||
801 | if (!pdata->encoder.module_name) | |
802 | dev_info(&pdev->dev, "Running without decoder\n"); | |
803 | ||
804 | lw = kzalloc(sizeof(*lw), GFP_KERNEL); | |
805 | if (!lw) { | |
806 | err = -ENOMEM; | |
807 | goto err; | |
808 | } | |
809 | ||
810 | if (pdev->dev.parent) | |
811 | lw->dev = pdev->dev.parent; | |
812 | else | |
813 | lw->dev = &pdev->dev; | |
814 | ||
815 | memcpy(&lw->pdata, pdata, sizeof(lw->pdata)); | |
816 | ||
817 | mutex_init(&lw->lock); | |
818 | ||
819 | lw->video_dev = timblogiw_template; | |
820 | ||
821 | strlcpy(lw->v4l2_dev.name, DRIVER_NAME, sizeof(lw->v4l2_dev.name)); | |
822 | err = v4l2_device_register(NULL, &lw->v4l2_dev); | |
823 | if (err) | |
824 | goto err_register; | |
825 | ||
826 | lw->video_dev.v4l2_dev = &lw->v4l2_dev; | |
827 | ||
828 | platform_set_drvdata(pdev, lw); | |
829 | video_set_drvdata(&lw->video_dev, lw); | |
830 | ||
831 | err = video_register_device(&lw->video_dev, VFL_TYPE_GRABBER, 0); | |
832 | if (err) { | |
833 | dev_err(&pdev->dev, "Error reg video: %d\n", err); | |
834 | goto err_request; | |
835 | } | |
836 | ||
837 | ||
838 | return 0; | |
839 | ||
840 | err_request: | |
841 | platform_set_drvdata(pdev, NULL); | |
842 | v4l2_device_unregister(&lw->v4l2_dev); | |
843 | err_register: | |
844 | kfree(lw); | |
845 | err: | |
846 | dev_err(&pdev->dev, "Failed to register: %d\n", err); | |
847 | ||
848 | return err; | |
849 | } | |
850 | ||
851 | static int __devexit timblogiw_remove(struct platform_device *pdev) | |
852 | { | |
853 | struct timblogiw *lw = platform_get_drvdata(pdev); | |
854 | ||
855 | video_unregister_device(&lw->video_dev); | |
856 | ||
857 | v4l2_device_unregister(&lw->v4l2_dev); | |
858 | ||
859 | kfree(lw); | |
860 | ||
861 | platform_set_drvdata(pdev, NULL); | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static struct platform_driver timblogiw_platform_driver = { | |
867 | .driver = { | |
868 | .name = DRIVER_NAME, | |
869 | .owner = THIS_MODULE, | |
870 | }, | |
871 | .probe = timblogiw_probe, | |
872 | .remove = __devexit_p(timblogiw_remove), | |
873 | }; | |
874 | ||
875 | /* Module functions */ | |
876 | ||
877 | static int __init timblogiw_init(void) | |
878 | { | |
879 | return platform_driver_register(&timblogiw_platform_driver); | |
880 | } | |
881 | ||
882 | static void __exit timblogiw_exit(void) | |
883 | { | |
884 | platform_driver_unregister(&timblogiw_platform_driver); | |
885 | } | |
886 | ||
887 | module_init(timblogiw_init); | |
888 | module_exit(timblogiw_exit); | |
889 | ||
890 | MODULE_DESCRIPTION(TIMBLOGIWIN_NAME); | |
891 | MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>"); | |
892 | MODULE_LICENSE("GPL v2"); | |
893 | MODULE_ALIAS("platform:"DRIVER_NAME); |