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/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>
30 #include <linux/module.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
timblogiw_bytes_per_line(const struct timblogiw_tvnorm * norm)96 static int timblogiw_bytes_per_line(const struct timblogiw_tvnorm *norm)
97 {
98 return norm->width * 2;
99 }
100
101
timblogiw_frame_size(const struct timblogiw_tvnorm * norm)102 static int timblogiw_frame_size(const struct timblogiw_tvnorm *norm)
103 {
104 return norm->height * timblogiw_bytes_per_line(norm);
105 }
106
timblogiw_get_norm(const v4l2_std_id std)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
timblogiw_dma_cb(void * data)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
timblogiw_dma_filter_fn(struct dma_chan * chan,void * filter_param)149 static bool timblogiw_dma_filter_fn(struct dma_chan *chan, void *filter_param)
150 {
151 return chan->chan_id == (uintptr_t)filter_param;
152 }
153
154 /* IOCTL functions */
155
timblogiw_g_fmt(struct file * file,void * priv,struct v4l2_format * format)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
timblogiw_try_fmt(struct file * file,void * priv,struct v4l2_format * format)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
timblogiw_s_fmt(struct file * file,void * priv,struct v4l2_format * format)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
timblogiw_querycap(struct file * file,void * priv,struct v4l2_capability * cap)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->driver) - 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
timblogiw_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * fmt)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
timblogiw_g_parm(struct file * file,void * priv,struct v4l2_streamparm * sp)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
timblogiw_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * rb)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
timblogiw_querybuf(struct file * file,void * priv,struct v4l2_buffer * b)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
timblogiw_qbuf(struct file * file,void * priv,struct v4l2_buffer * b)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
timblogiw_dqbuf(struct file * file,void * priv,struct v4l2_buffer * b)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
timblogiw_g_std(struct file * file,void * priv,v4l2_std_id * std)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
timblogiw_s_std(struct file * file,void * priv,v4l2_std_id * std)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
timblogiw_enuminput(struct file * file,void * priv,struct v4l2_input * inp)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 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
timblogiw_g_input(struct file * file,void * priv,unsigned int * input)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
timblogiw_s_input(struct file * file,void * priv,unsigned int input)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
timblogiw_streamon(struct file * file,void * priv,unsigned int type)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
timblogiw_streamoff(struct file * file,void * priv,unsigned int type)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
timblogiw_querystd(struct file * file,void * priv,v4l2_std_id * std)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
timblogiw_enum_framesizes(struct file * file,void * priv,struct v4l2_frmsizeenum * fsize)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
buffer_setup(struct videobuf_queue * vq,unsigned int * count,unsigned int * size)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
buffer_prepare(struct videobuf_queue * vq,struct videobuf_buffer * vb,enum v4l2_field field)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
buffer_queue(struct videobuf_queue * vq,struct videobuf_buffer * vb)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_DEV_TO_MEM,
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
buffer_release(struct videobuf_queue * vq,struct videobuf_buffer * vb)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
timblogiw_open(struct file * file)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,
671 (void *)(uintptr_t)lw->pdata.dma_channel);
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
timblogiw_close(struct file * file)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
timblogiw_read(struct file * file,char __user * data,size_t count,loff_t * ppos)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
timblogiw_poll(struct file * file,struct poll_table_struct * wait)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
timblogiw_mmap(struct file * file,struct vm_area_struct * vma)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
748 static __devinitconst struct v4l2_ioctl_ops timblogiw_ioctl_ops = {
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
770 static __devinitconst struct v4l2_file_operations timblogiw_fops = {
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
780 static __devinitconst struct video_device timblogiw_template = {
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
timblogiw_probe(struct platform_device * pdev)789 static int __devinit timblogiw_probe(struct platform_device *pdev)
790 {
791 int err;
792 struct timblogiw *lw = NULL;
793 struct timb_video_platform_data *pdata = pdev->dev.platform_data;
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
timblogiw_remove(struct platform_device * pdev)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_platform_driver(timblogiw_platform_driver);
876
877 MODULE_DESCRIPTION(TIMBLOGIWIN_NAME);
878 MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>");
879 MODULE_LICENSE("GPL v2");
880 MODULE_ALIAS("platform:"DRIVER_NAME);
881