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[media] include/media: move platform_data to linux/platform_data/media
[linux-2.6-block.git] / drivers / media / platform / timblogiw.c
CommitLineData
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>
eb4b0ec7 34#include <linux/platform_data/media/timb_video.h>
9eae42e5
RR		 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
47struct 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
57struct timblogiw_tvnorm {
58 v4l2_std_id std;
59 u16 width;
60 u16 height;
61 u8 fps;
62};
63
64struct 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
73struct 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 81static 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
96static int timblogiw_bytes_per_line(const struct timblogiw_tvnorm *norm)
97{
98 return norm->width * 2;
99}
100
101
102static int timblogiw_frame_size(const struct timblogiw_tvnorm *norm)
103{
104 return norm->height * timblogiw_bytes_per_line(norm);
105}
106
107static 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
118static 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
149static 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
156static 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
182static 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
207static 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
231out:
232 mutex_unlock(&lw->lock);
233 return err;
234}
235
236static 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
252static 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
271static 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
284static 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
295static 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
306static 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
316static 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
327static 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 338static 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
360static 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
383static 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
395static 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 406static 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
422static 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
436static 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
452static 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
474static 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
490static 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
537err:
538 videobuf_dma_contig_free(vq, vb);
539 vb->state = VIDEOBUF_NEEDS_INIT;
540 return err;
541}
542
543static 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
584static 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
599static 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
608static 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;
685out:
686 mutex_unlock(&lw->lock);
687
688 return err;
689}
690
691static 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
712static 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
724static 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
735static 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 747static 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 769static 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 779static 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 788static 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
838err_request:
9eae42e5 839 v4l2_device_unregister(&lw->v4l2_dev);
9eae42e5
RR		 840err:
841 dev_err(&pdev->dev, "Failed to register: %d\n", err);
842
843 return err;
844}
845
4c62e976 846static 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
857static struct platform_driver timblogiw_platform_driver = {
858 .driver = {
859 .name = DRIVER_NAME,
9eae42e5
RR		 860 },
861 .probe = timblogiw_probe,
4c62e976 862 .remove = timblogiw_remove,
9eae42e5
RR		 863};
864
1d6629b1 865module_platform_driver(timblogiw_platform_driver);
9eae42e5
RR		 866
867MODULE_DESCRIPTION(TIMBLOGIWIN_NAME);
868MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>");
869MODULE_LICENSE("GPL v2");
870MODULE_ALIAS("platform:"DRIVER_NAME);
Linux 6.x block layer and io_uring tree(s)