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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / platform / timblogiw.c
blobccdadd623a3aae3ffabd49be553709d5a9511ec6
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 static 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 v4l2_get_timestamp(&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 == (uintptr_t)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 strncpy(cap->card, TIMBLOGIWIN_NAME, sizeof(cap->card)-1);
243 strncpy(cap->driver, DRIVER_NAME, sizeof(cap->driver) - 1);
244 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", vdev->name);
245 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
246 V4L2_CAP_READWRITE;
247 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
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
338 static int timblogiw_s_std(struct file *file, void *priv, v4l2_std_id std)
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))
350 err = v4l2_subdev_call(lw->sd_enc, core, s_std, std);
351
352 if (!err)
353 fh->cur_norm = timblogiw_get_norm(std);
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
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
406 static int timblogiw_streamon(struct file *file, void *priv, enum v4l2_buf_type type)
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,
423 enum v4l2_buf_type type)
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
566 desc = dmaengine_prep_slave_sg(fh->chan,
567 buf->sg, sg_elems, DMA_DEV_TO_MEM,
568 DMA_PREP_INTERRUPT);
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,
670 (void *)(uintptr_t)lw->pdata.dma_channel);
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
747 static struct v4l2_ioctl_ops timblogiw_ioctl_ops = {
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
769 static struct v4l2_file_operations timblogiw_fops = {
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
779 static struct video_device timblogiw_template = {
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
788 static int timblogiw_probe(struct platform_device *pdev)
789 {
790 int err;
791 struct timblogiw *lw = NULL;
792 struct timb_video_platform_data *pdata = pdev->dev.platform_data;
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
803 lw = kzalloc(sizeof(*lw), GFP_KERNEL);
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)
823 goto err_register;
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
836 return 0;
837
838 err_request:
839 v4l2_device_unregister(&lw->v4l2_dev);
840 err_register:
841 kfree(lw);
842 err:
843 dev_err(&pdev->dev, "Failed to register: %d\n", err);
844
845 return err;
846 }
847
848 static int timblogiw_remove(struct platform_device *pdev)
849 {
850 struct timblogiw *lw = platform_get_drvdata(pdev);
851
852 video_unregister_device(&lw->video_dev);
853
854 v4l2_device_unregister(&lw->v4l2_dev);
855
856 kfree(lw);
857
858 return 0;
859 }
860
861 static struct platform_driver timblogiw_platform_driver = {
862 .driver = {
863 .name = DRIVER_NAME,
864 .owner = THIS_MODULE,
865 },
866 .probe = timblogiw_probe,
867 .remove = timblogiw_remove,
868 };
869
870 module_platform_driver(timblogiw_platform_driver);
871
872 MODULE_DESCRIPTION(TIMBLOGIWIN_NAME);
873 MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>");
874 MODULE_LICENSE("GPL v2");
875 MODULE_ALIAS("platform:"DRIVER_NAME);
Linux with added FPC-III support