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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 | ||
a9fc36af | 81 | static const struct timblogiw_tvnorm timblogiw_tvnorms[] = { |
9eae42e5 RR |
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); | |
8e6057b5 | 133 | v4l2_get_timestamp(&vb->ts); |
9eae42e5 RR |
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__); | |
9eae42e5 | 242 | strncpy(cap->card, TIMBLOGIWIN_NAME, sizeof(cap->card)-1); |
dcd745b7 | 243 | strncpy(cap->driver, DRIVER_NAME, sizeof(cap->driver) - 1); |
8f9acd23 HV |
244 | snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", vdev->name); |
245 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | | |
9eae42e5 | 246 | V4L2_CAP_READWRITE; |
8f9acd23 | 247 | cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
9eae42e5 RR |
248 | |
249 | return 0; | |
250 | } | |
251 | ||
252 | static int timblogiw_enum_fmt(struct file *file, void *priv, | |
253 | struct v4l2_fmtdesc *fmt) | |
254 | { | |
255 | struct video_device *vdev = video_devdata(file); | |
256 | ||
257 | dev_dbg(&vdev->dev, "%s, index: %d\n", __func__, fmt->index); | |
258 | ||
259 | if (fmt->index != 0) | |
260 | return -EINVAL; | |
261 | memset(fmt, 0, sizeof(*fmt)); | |
262 | fmt->index = 0; | |
263 | fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
264 | strncpy(fmt->description, "4:2:2, packed, YUYV", | |
265 | sizeof(fmt->description)-1); | |
266 | fmt->pixelformat = V4L2_PIX_FMT_UYVY; | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | static int timblogiw_g_parm(struct file *file, void *priv, | |
272 | struct v4l2_streamparm *sp) | |
273 | { | |
274 | struct timblogiw_fh *fh = priv; | |
275 | struct v4l2_captureparm *cp = &sp->parm.capture; | |
276 | ||
277 | cp->capability = V4L2_CAP_TIMEPERFRAME; | |
278 | cp->timeperframe.numerator = 1; | |
279 | cp->timeperframe.denominator = fh->cur_norm->fps; | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static int timblogiw_reqbufs(struct file *file, void *priv, | |
285 | struct v4l2_requestbuffers *rb) | |
286 | { | |
287 | struct video_device *vdev = video_devdata(file); | |
288 | struct timblogiw_fh *fh = priv; | |
289 | ||
290 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
291 | ||
292 | return videobuf_reqbufs(&fh->vb_vidq, rb); | |
293 | } | |
294 | ||
295 | static int timblogiw_querybuf(struct file *file, void *priv, | |
296 | struct v4l2_buffer *b) | |
297 | { | |
298 | struct video_device *vdev = video_devdata(file); | |
299 | struct timblogiw_fh *fh = priv; | |
300 | ||
301 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
302 | ||
303 | return videobuf_querybuf(&fh->vb_vidq, b); | |
304 | } | |
305 | ||
306 | static int timblogiw_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) | |
307 | { | |
308 | struct video_device *vdev = video_devdata(file); | |
309 | struct timblogiw_fh *fh = priv; | |
310 | ||
311 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
312 | ||
313 | return videobuf_qbuf(&fh->vb_vidq, b); | |
314 | } | |
315 | ||
316 | static int timblogiw_dqbuf(struct file *file, void *priv, | |
317 | struct v4l2_buffer *b) | |
318 | { | |
319 | struct video_device *vdev = video_devdata(file); | |
320 | struct timblogiw_fh *fh = priv; | |
321 | ||
322 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
323 | ||
324 | return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK); | |
325 | } | |
326 | ||
327 | static int timblogiw_g_std(struct file *file, void *priv, v4l2_std_id *std) | |
328 | { | |
329 | struct video_device *vdev = video_devdata(file); | |
330 | struct timblogiw_fh *fh = priv; | |
331 | ||
332 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
333 | ||
334 | *std = fh->cur_norm->std; | |
335 | return 0; | |
336 | } | |
337 | ||
314527ac | 338 | static int timblogiw_s_std(struct file *file, void *priv, v4l2_std_id std) |
9eae42e5 RR |
339 | { |
340 | struct video_device *vdev = video_devdata(file); | |
341 | struct timblogiw *lw = video_get_drvdata(vdev); | |
342 | struct timblogiw_fh *fh = priv; | |
343 | int err = 0; | |
344 | ||
345 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
346 | ||
347 | mutex_lock(&lw->lock); | |
348 | ||
349 | if (TIMBLOGIW_HAS_DECODER(lw)) | |
8774bed9 | 350 | err = v4l2_subdev_call(lw->sd_enc, video, s_std, std); |
9eae42e5 RR |
351 | |
352 | if (!err) | |
314527ac | 353 | fh->cur_norm = timblogiw_get_norm(std); |
9eae42e5 RR |
354 | |
355 | mutex_unlock(&lw->lock); | |
356 | ||
357 | return err; | |
358 | } | |
359 | ||
360 | static int timblogiw_enuminput(struct file *file, void *priv, | |
361 | struct v4l2_input *inp) | |
362 | { | |
363 | struct video_device *vdev = video_devdata(file); | |
364 | int i; | |
365 | ||
366 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
367 | ||
368 | if (inp->index != 0) | |
369 | return -EINVAL; | |
370 | ||
9eae42e5 RR |
371 | inp->index = 0; |
372 | ||
373 | strncpy(inp->name, "Timb input 1", sizeof(inp->name) - 1); | |
374 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
375 | ||
376 | inp->std = 0; | |
377 | for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++) | |
378 | inp->std |= timblogiw_tvnorms[i].std; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | static int timblogiw_g_input(struct file *file, void *priv, | |
384 | unsigned int *input) | |
385 | { | |
386 | struct video_device *vdev = video_devdata(file); | |
387 | ||
388 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
389 | ||
390 | *input = 0; | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | static int timblogiw_s_input(struct file *file, void *priv, unsigned int input) | |
396 | { | |
397 | struct video_device *vdev = video_devdata(file); | |
398 | ||
399 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
400 | ||
401 | if (input != 0) | |
402 | return -EINVAL; | |
403 | return 0; | |
404 | } | |
405 | ||
19227efb | 406 | static int timblogiw_streamon(struct file *file, void *priv, enum v4l2_buf_type type) |
9eae42e5 RR |
407 | { |
408 | struct video_device *vdev = video_devdata(file); | |
409 | struct timblogiw_fh *fh = priv; | |
410 | ||
411 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
412 | ||
413 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
414 | dev_dbg(&vdev->dev, "%s - No capture device\n", __func__); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | fh->frame_count = 0; | |
419 | return videobuf_streamon(&fh->vb_vidq); | |
420 | } | |
421 | ||
422 | static int timblogiw_streamoff(struct file *file, void *priv, | |
19227efb | 423 | enum v4l2_buf_type type) |
9eae42e5 RR |
424 | { |
425 | struct video_device *vdev = video_devdata(file); | |
426 | struct timblogiw_fh *fh = priv; | |
427 | ||
428 | dev_dbg(&vdev->dev, "%s entry\n", __func__); | |
429 | ||
430 | if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
431 | return -EINVAL; | |
432 | ||
433 | return videobuf_streamoff(&fh->vb_vidq); | |
434 | } | |
435 | ||
436 | static int timblogiw_querystd(struct file *file, void *priv, v4l2_std_id *std) | |
437 | { | |
438 | struct video_device *vdev = video_devdata(file); | |
439 | struct timblogiw *lw = video_get_drvdata(vdev); | |
440 | struct timblogiw_fh *fh = priv; | |
441 | ||
442 | dev_dbg(&vdev->dev, "%s entry\n", __func__); | |
443 | ||
444 | if (TIMBLOGIW_HAS_DECODER(lw)) | |
445 | return v4l2_subdev_call(lw->sd_enc, video, querystd, std); | |
446 | else { | |
447 | *std = fh->cur_norm->std; | |
448 | return 0; | |
449 | } | |
450 | } | |
451 | ||
452 | static int timblogiw_enum_framesizes(struct file *file, void *priv, | |
453 | struct v4l2_frmsizeenum *fsize) | |
454 | { | |
455 | struct video_device *vdev = video_devdata(file); | |
456 | struct timblogiw_fh *fh = priv; | |
457 | ||
458 | dev_dbg(&vdev->dev, "%s - index: %d, format: %d\n", __func__, | |
459 | fsize->index, fsize->pixel_format); | |
460 | ||
461 | if ((fsize->index != 0) || | |
462 | (fsize->pixel_format != V4L2_PIX_FMT_UYVY)) | |
463 | return -EINVAL; | |
464 | ||
465 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
466 | fsize->discrete.width = fh->cur_norm->width; | |
467 | fsize->discrete.height = fh->cur_norm->height; | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | /* Video buffer functions */ | |
473 | ||
474 | static int buffer_setup(struct videobuf_queue *vq, unsigned int *count, | |
475 | unsigned int *size) | |
476 | { | |
477 | struct timblogiw_fh *fh = vq->priv_data; | |
478 | ||
479 | *size = timblogiw_frame_size(fh->cur_norm); | |
480 | ||
481 | if (!*count) | |
482 | *count = 32; | |
483 | ||
484 | while (*size * *count > TIMBLOGIW_MAX_VIDEO_MEM * 1024 * 1024) | |
485 | (*count)--; | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
490 | static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, | |
491 | enum v4l2_field field) | |
492 | { | |
493 | struct timblogiw_fh *fh = vq->priv_data; | |
494 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
495 | vb); | |
496 | unsigned int data_size = timblogiw_frame_size(fh->cur_norm); | |
497 | int err = 0; | |
498 | ||
499 | if (vb->baddr && vb->bsize < data_size) | |
500 | /* User provided buffer, but it is too small */ | |
501 | return -ENOMEM; | |
502 | ||
503 | vb->size = data_size; | |
504 | vb->width = fh->cur_norm->width; | |
505 | vb->height = fh->cur_norm->height; | |
506 | vb->field = field; | |
507 | ||
508 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
509 | int i; | |
510 | unsigned int size; | |
511 | unsigned int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * | |
512 | timblogiw_bytes_per_line(fh->cur_norm); | |
513 | dma_addr_t addr; | |
514 | ||
515 | sg_init_table(buf->sg, ARRAY_SIZE(buf->sg)); | |
516 | ||
517 | err = videobuf_iolock(vq, vb, NULL); | |
518 | if (err) | |
519 | goto err; | |
520 | ||
521 | addr = videobuf_to_dma_contig(vb); | |
522 | for (i = 0, size = 0; size < data_size; i++) { | |
523 | sg_dma_address(buf->sg + i) = addr + size; | |
524 | size += bytes_per_desc; | |
525 | sg_dma_len(buf->sg + i) = (size > data_size) ? | |
526 | (bytes_per_desc - (size - data_size)) : | |
527 | bytes_per_desc; | |
528 | } | |
529 | ||
530 | vb->state = VIDEOBUF_PREPARED; | |
531 | buf->cookie = -1; | |
532 | buf->fh = fh; | |
533 | } | |
534 | ||
535 | return 0; | |
536 | ||
537 | err: | |
538 | videobuf_dma_contig_free(vq, vb); | |
539 | vb->state = VIDEOBUF_NEEDS_INIT; | |
540 | return err; | |
541 | } | |
542 | ||
543 | static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
544 | { | |
545 | struct timblogiw_fh *fh = vq->priv_data; | |
546 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
547 | vb); | |
548 | struct dma_async_tx_descriptor *desc; | |
549 | int sg_elems; | |
550 | int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC * | |
551 | timblogiw_bytes_per_line(fh->cur_norm); | |
552 | ||
553 | sg_elems = timblogiw_frame_size(fh->cur_norm) / bytes_per_desc; | |
554 | sg_elems += | |
555 | (timblogiw_frame_size(fh->cur_norm) % bytes_per_desc) ? 1 : 0; | |
556 | ||
557 | if (list_empty(&fh->capture)) | |
558 | vb->state = VIDEOBUF_ACTIVE; | |
559 | else | |
560 | vb->state = VIDEOBUF_QUEUED; | |
561 | ||
562 | list_add_tail(&vb->queue, &fh->capture); | |
563 | ||
564 | spin_unlock_irq(&fh->queue_lock); | |
565 | ||
16052827 | 566 | desc = dmaengine_prep_slave_sg(fh->chan, |
1003cab8 | 567 | buf->sg, sg_elems, DMA_DEV_TO_MEM, |
0776ae7b | 568 | DMA_PREP_INTERRUPT); |
9eae42e5 RR |
569 | if (!desc) { |
570 | spin_lock_irq(&fh->queue_lock); | |
571 | list_del_init(&vb->queue); | |
572 | vb->state = VIDEOBUF_PREPARED; | |
573 | return; | |
574 | } | |
575 | ||
576 | desc->callback_param = buf; | |
577 | desc->callback = timblogiw_dma_cb; | |
578 | ||
579 | buf->cookie = desc->tx_submit(desc); | |
580 | ||
581 | spin_lock_irq(&fh->queue_lock); | |
582 | } | |
583 | ||
584 | static void buffer_release(struct videobuf_queue *vq, | |
585 | struct videobuf_buffer *vb) | |
586 | { | |
587 | struct timblogiw_fh *fh = vq->priv_data; | |
588 | struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer, | |
589 | vb); | |
590 | ||
591 | videobuf_waiton(vq, vb, 0, 0); | |
592 | if (buf->cookie >= 0) | |
593 | dma_sync_wait(fh->chan, buf->cookie); | |
594 | ||
595 | videobuf_dma_contig_free(vq, vb); | |
596 | vb->state = VIDEOBUF_NEEDS_INIT; | |
597 | } | |
598 | ||
599 | static struct videobuf_queue_ops timblogiw_video_qops = { | |
600 | .buf_setup = buffer_setup, | |
601 | .buf_prepare = buffer_prepare, | |
602 | .buf_queue = buffer_queue, | |
603 | .buf_release = buffer_release, | |
604 | }; | |
605 | ||
606 | /* Device Operations functions */ | |
607 | ||
608 | static int timblogiw_open(struct file *file) | |
609 | { | |
610 | struct video_device *vdev = video_devdata(file); | |
611 | struct timblogiw *lw = video_get_drvdata(vdev); | |
612 | struct timblogiw_fh *fh; | |
613 | v4l2_std_id std; | |
614 | dma_cap_mask_t mask; | |
615 | int err = 0; | |
616 | ||
617 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
618 | ||
619 | mutex_lock(&lw->lock); | |
620 | if (lw->opened) { | |
621 | err = -EBUSY; | |
622 | goto out; | |
623 | } | |
624 | ||
625 | if (TIMBLOGIW_HAS_DECODER(lw) && !lw->sd_enc) { | |
626 | struct i2c_adapter *adapt; | |
627 | ||
628 | /* find the video decoder */ | |
629 | adapt = i2c_get_adapter(lw->pdata.i2c_adapter); | |
630 | if (!adapt) { | |
631 | dev_err(&vdev->dev, "No I2C bus #%d\n", | |
632 | lw->pdata.i2c_adapter); | |
633 | err = -ENODEV; | |
634 | goto out; | |
635 | } | |
636 | ||
637 | /* now find the encoder */ | |
638 | lw->sd_enc = v4l2_i2c_new_subdev_board(&lw->v4l2_dev, adapt, | |
639 | lw->pdata.encoder.info, NULL); | |
640 | ||
641 | i2c_put_adapter(adapt); | |
642 | ||
643 | if (!lw->sd_enc) { | |
644 | dev_err(&vdev->dev, "Failed to get encoder: %s\n", | |
645 | lw->pdata.encoder.module_name); | |
646 | err = -ENODEV; | |
647 | goto out; | |
648 | } | |
649 | } | |
650 | ||
651 | fh = kzalloc(sizeof(*fh), GFP_KERNEL); | |
652 | if (!fh) { | |
653 | err = -ENOMEM; | |
654 | goto out; | |
655 | } | |
656 | ||
657 | fh->cur_norm = timblogiw_tvnorms; | |
658 | timblogiw_querystd(file, fh, &std); | |
659 | fh->cur_norm = timblogiw_get_norm(std); | |
660 | ||
661 | INIT_LIST_HEAD(&fh->capture); | |
662 | spin_lock_init(&fh->queue_lock); | |
663 | ||
664 | dma_cap_zero(mask); | |
665 | dma_cap_set(DMA_SLAVE, mask); | |
666 | dma_cap_set(DMA_PRIVATE, mask); | |
667 | ||
668 | /* find the DMA channel */ | |
669 | fh->chan = dma_request_channel(mask, timblogiw_dma_filter_fn, | |
61ea3aa5 | 670 | (void *)(uintptr_t)lw->pdata.dma_channel); |
9eae42e5 RR |
671 | if (!fh->chan) { |
672 | dev_err(&vdev->dev, "Failed to get DMA channel\n"); | |
673 | kfree(fh); | |
674 | err = -ENODEV; | |
675 | goto out; | |
676 | } | |
677 | ||
678 | file->private_data = fh; | |
679 | videobuf_queue_dma_contig_init(&fh->vb_vidq, | |
680 | &timblogiw_video_qops, lw->dev, &fh->queue_lock, | |
681 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, | |
682 | sizeof(struct timblogiw_buffer), fh, NULL); | |
683 | ||
684 | lw->opened = true; | |
685 | out: | |
686 | mutex_unlock(&lw->lock); | |
687 | ||
688 | return err; | |
689 | } | |
690 | ||
691 | static int timblogiw_close(struct file *file) | |
692 | { | |
693 | struct video_device *vdev = video_devdata(file); | |
694 | struct timblogiw *lw = video_get_drvdata(vdev); | |
695 | struct timblogiw_fh *fh = file->private_data; | |
696 | ||
697 | dev_dbg(&vdev->dev, "%s: Entry\n", __func__); | |
698 | ||
699 | videobuf_stop(&fh->vb_vidq); | |
700 | videobuf_mmap_free(&fh->vb_vidq); | |
701 | ||
702 | dma_release_channel(fh->chan); | |
703 | ||
704 | kfree(fh); | |
705 | ||
706 | mutex_lock(&lw->lock); | |
707 | lw->opened = false; | |
708 | mutex_unlock(&lw->lock); | |
709 | return 0; | |
710 | } | |
711 | ||
712 | static ssize_t timblogiw_read(struct file *file, char __user *data, | |
713 | size_t count, loff_t *ppos) | |
714 | { | |
715 | struct video_device *vdev = video_devdata(file); | |
716 | struct timblogiw_fh *fh = file->private_data; | |
717 | ||
718 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
719 | ||
720 | return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0, | |
721 | file->f_flags & O_NONBLOCK); | |
722 | } | |
723 | ||
724 | static unsigned int timblogiw_poll(struct file *file, | |
725 | struct poll_table_struct *wait) | |
726 | { | |
727 | struct video_device *vdev = video_devdata(file); | |
728 | struct timblogiw_fh *fh = file->private_data; | |
729 | ||
730 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
731 | ||
732 | return videobuf_poll_stream(file, &fh->vb_vidq, wait); | |
733 | } | |
734 | ||
735 | static int timblogiw_mmap(struct file *file, struct vm_area_struct *vma) | |
736 | { | |
737 | struct video_device *vdev = video_devdata(file); | |
738 | struct timblogiw_fh *fh = file->private_data; | |
739 | ||
740 | dev_dbg(&vdev->dev, "%s: entry\n", __func__); | |
741 | ||
742 | return videobuf_mmap_mapper(&fh->vb_vidq, vma); | |
743 | } | |
744 | ||
745 | /* Platform device functions */ | |
746 | ||
4c62e976 | 747 | static struct v4l2_ioctl_ops timblogiw_ioctl_ops = { |
9eae42e5 RR |
748 | .vidioc_querycap = timblogiw_querycap, |
749 | .vidioc_enum_fmt_vid_cap = timblogiw_enum_fmt, | |
750 | .vidioc_g_fmt_vid_cap = timblogiw_g_fmt, | |
751 | .vidioc_try_fmt_vid_cap = timblogiw_try_fmt, | |
752 | .vidioc_s_fmt_vid_cap = timblogiw_s_fmt, | |
753 | .vidioc_g_parm = timblogiw_g_parm, | |
754 | .vidioc_reqbufs = timblogiw_reqbufs, | |
755 | .vidioc_querybuf = timblogiw_querybuf, | |
756 | .vidioc_qbuf = timblogiw_qbuf, | |
757 | .vidioc_dqbuf = timblogiw_dqbuf, | |
758 | .vidioc_g_std = timblogiw_g_std, | |
759 | .vidioc_s_std = timblogiw_s_std, | |
760 | .vidioc_enum_input = timblogiw_enuminput, | |
761 | .vidioc_g_input = timblogiw_g_input, | |
762 | .vidioc_s_input = timblogiw_s_input, | |
763 | .vidioc_streamon = timblogiw_streamon, | |
764 | .vidioc_streamoff = timblogiw_streamoff, | |
765 | .vidioc_querystd = timblogiw_querystd, | |
766 | .vidioc_enum_framesizes = timblogiw_enum_framesizes, | |
767 | }; | |
768 | ||
4c62e976 | 769 | static struct v4l2_file_operations timblogiw_fops = { |
9eae42e5 RR |
770 | .owner = THIS_MODULE, |
771 | .open = timblogiw_open, | |
772 | .release = timblogiw_close, | |
773 | .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ | |
774 | .mmap = timblogiw_mmap, | |
775 | .read = timblogiw_read, | |
776 | .poll = timblogiw_poll, | |
777 | }; | |
778 | ||
4c62e976 | 779 | static struct video_device timblogiw_template = { |
9eae42e5 RR |
780 | .name = TIMBLOGIWIN_NAME, |
781 | .fops = &timblogiw_fops, | |
782 | .ioctl_ops = &timblogiw_ioctl_ops, | |
783 | .release = video_device_release_empty, | |
784 | .minor = -1, | |
785 | .tvnorms = V4L2_STD_PAL | V4L2_STD_NTSC | |
786 | }; | |
787 | ||
4c62e976 | 788 | static int timblogiw_probe(struct platform_device *pdev) |
9eae42e5 RR |
789 | { |
790 | int err; | |
791 | struct timblogiw *lw = NULL; | |
3271d382 | 792 | struct timb_video_platform_data *pdata = pdev->dev.platform_data; |
9eae42e5 RR |
793 | |
794 | if (!pdata) { | |
795 | dev_err(&pdev->dev, "No platform data\n"); | |
796 | err = -EINVAL; | |
797 | goto err; | |
798 | } | |
799 | ||
800 | if (!pdata->encoder.module_name) | |
801 | dev_info(&pdev->dev, "Running without decoder\n"); | |
802 | ||
30616fff | 803 | lw = devm_kzalloc(&pdev->dev, sizeof(*lw), GFP_KERNEL); |
9eae42e5 RR |
804 | if (!lw) { |
805 | err = -ENOMEM; | |
806 | goto err; | |
807 | } | |
808 | ||
809 | if (pdev->dev.parent) | |
810 | lw->dev = pdev->dev.parent; | |
811 | else | |
812 | lw->dev = &pdev->dev; | |
813 | ||
814 | memcpy(&lw->pdata, pdata, sizeof(lw->pdata)); | |
815 | ||
816 | mutex_init(&lw->lock); | |
817 | ||
818 | lw->video_dev = timblogiw_template; | |
819 | ||
820 | strlcpy(lw->v4l2_dev.name, DRIVER_NAME, sizeof(lw->v4l2_dev.name)); | |
821 | err = v4l2_device_register(NULL, &lw->v4l2_dev); | |
822 | if (err) | |
30616fff | 823 | goto err; |
9eae42e5 RR |
824 | |
825 | lw->video_dev.v4l2_dev = &lw->v4l2_dev; | |
826 | ||
827 | platform_set_drvdata(pdev, lw); | |
828 | video_set_drvdata(&lw->video_dev, lw); | |
829 | ||
830 | err = video_register_device(&lw->video_dev, VFL_TYPE_GRABBER, 0); | |
831 | if (err) { | |
832 | dev_err(&pdev->dev, "Error reg video: %d\n", err); | |
833 | goto err_request; | |
834 | } | |
835 | ||
9eae42e5 RR |
836 | return 0; |
837 | ||
838 | err_request: | |
9eae42e5 | 839 | v4l2_device_unregister(&lw->v4l2_dev); |
9eae42e5 RR |
840 | err: |
841 | dev_err(&pdev->dev, "Failed to register: %d\n", err); | |
842 | ||
843 | return err; | |
844 | } | |
845 | ||
4c62e976 | 846 | static int timblogiw_remove(struct platform_device *pdev) |
9eae42e5 RR |
847 | { |
848 | struct timblogiw *lw = platform_get_drvdata(pdev); | |
849 | ||
850 | video_unregister_device(&lw->video_dev); | |
851 | ||
852 | v4l2_device_unregister(&lw->v4l2_dev); | |
853 | ||
9eae42e5 RR |
854 | return 0; |
855 | } | |
856 | ||
857 | static struct platform_driver timblogiw_platform_driver = { | |
858 | .driver = { | |
859 | .name = DRIVER_NAME, | |
860 | .owner = THIS_MODULE, | |
861 | }, | |
862 | .probe = timblogiw_probe, | |
4c62e976 | 863 | .remove = timblogiw_remove, |
9eae42e5 RR |
864 | }; |
865 | ||
1d6629b1 | 866 | module_platform_driver(timblogiw_platform_driver); |
9eae42e5 RR |
867 | |
868 | MODULE_DESCRIPTION(TIMBLOGIWIN_NAME); | |
869 | MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>"); | |
870 | MODULE_LICENSE("GPL v2"); | |
871 | MODULE_ALIAS("platform:"DRIVER_NAME); |