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1/*
2 * Analog Devices video capture driver
3 *
4 * Copyright (c) 2011 Analog Devices Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20#include <linux/completion.h>
21#include <linux/delay.h>
22#include <linux/errno.h>
23#include <linux/fs.h>
24#include <linux/i2c.h>
25#include <linux/init.h>
26#include <linux/interrupt.h>
27#include <linux/io.h>
28#include <linux/mm.h>
29#include <linux/module.h>
30#include <linux/platform_device.h>
31#include <linux/slab.h>
32#include <linux/time.h>
33#include <linux/types.h>
34
35#include <media/v4l2-chip-ident.h>
36#include <media/v4l2-common.h>
37#include <media/v4l2-ctrls.h>
38#include <media/v4l2-device.h>
39#include <media/v4l2-ioctl.h>
40#include <media/videobuf2-dma-contig.h>
41
42#include <asm/dma.h>
43
44#include <media/blackfin/bfin_capture.h>
45#include <media/blackfin/ppi.h>
46
47#define CAPTURE_DRV_NAME "bfin_capture"
48#define BCAP_MIN_NUM_BUF 2
49
50struct bcap_format {
51 char *desc;
52 u32 pixelformat;
53 enum v4l2_mbus_pixelcode mbus_code;
54 int bpp; /* bits per pixel */
55};
56
57struct bcap_buffer {
58 struct vb2_buffer vb;
59 struct list_head list;
60};
61
62struct bcap_device {
63 /* capture device instance */
64 struct v4l2_device v4l2_dev;
65 /* v4l2 control handler */
66 struct v4l2_ctrl_handler ctrl_handler;
67 /* device node data */
68 struct video_device *video_dev;
69 /* sub device instance */
70 struct v4l2_subdev *sd;
71 /* capture config */
72 struct bfin_capture_config *cfg;
73 /* ppi interface */
74 struct ppi_if *ppi;
75 /* current input */
76 unsigned int cur_input;
77 /* current selected standard */
78 v4l2_std_id std;
79 /* used to store pixel format */
80 struct v4l2_pix_format fmt;
81 /* bits per pixel*/
82 int bpp;
83 /* used to store sensor supported format */
84 struct bcap_format *sensor_formats;
85 /* number of sensor formats array */
86 int num_sensor_formats;
87 /* pointing to current video buffer */
88 struct bcap_buffer *cur_frm;
89 /* pointing to next video buffer */
90 struct bcap_buffer *next_frm;
91 /* buffer queue used in videobuf2 */
92 struct vb2_queue buffer_queue;
93 /* allocator-specific contexts for each plane */
94 struct vb2_alloc_ctx *alloc_ctx;
95 /* queue of filled frames */
96 struct list_head dma_queue;
97 /* used in videobuf2 callback */
98 spinlock_t lock;
99 /* used to access capture device */
100 struct mutex mutex;
101 /* used to wait ppi to complete one transfer */
102 struct completion comp;
103 /* prepare to stop */
104 bool stop;
105};
106
107struct bcap_fh {
108 struct v4l2_fh fh;
109 /* indicates whether this file handle is doing IO */
110 bool io_allowed;
111};
112
113static const struct bcap_format bcap_formats[] = {
114 {
115 .desc = "YCbCr 4:2:2 Interleaved UYVY",
116 .pixelformat = V4L2_PIX_FMT_UYVY,
117 .mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
118 .bpp = 16,
119 },
120 {
121 .desc = "YCbCr 4:2:2 Interleaved YUYV",
122 .pixelformat = V4L2_PIX_FMT_YUYV,
123 .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
124 .bpp = 16,
125 },
126 {
127 .desc = "RGB 565",
128 .pixelformat = V4L2_PIX_FMT_RGB565,
129 .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE,
130 .bpp = 16,
131 },
132 {
133 .desc = "RGB 444",
134 .pixelformat = V4L2_PIX_FMT_RGB444,
135 .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
136 .bpp = 16,
137 },
138
139};
140#define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
141
142static irqreturn_t bcap_isr(int irq, void *dev_id);
143
144static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
145{
146 return container_of(vb, struct bcap_buffer, vb);
147}
148
149static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
150{
151 enum v4l2_mbus_pixelcode code;
152 struct bcap_format *sf;
153 unsigned int num_formats = 0;
154 int i, j;
155
156 while (!v4l2_subdev_call(bcap_dev->sd, video,
157 enum_mbus_fmt, num_formats, &code))
158 num_formats++;
159 if (!num_formats)
160 return -ENXIO;
161
162 sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
163 if (!sf)
164 return -ENOMEM;
165
166 for (i = 0; i < num_formats; i++) {
167 v4l2_subdev_call(bcap_dev->sd, video,
168 enum_mbus_fmt, i, &code);
169 for (j = 0; j < BCAP_MAX_FMTS; j++)
170 if (code == bcap_formats[j].mbus_code)
171 break;
172 if (j == BCAP_MAX_FMTS) {
173 /* we don't allow this sensor working with our bridge */
174 kfree(sf);
175 return -EINVAL;
176 }
177 sf[i] = bcap_formats[j];
178 }
179 bcap_dev->sensor_formats = sf;
180 bcap_dev->num_sensor_formats = num_formats;
181 return 0;
182}
183
184static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
185{
186 bcap_dev->num_sensor_formats = 0;
187 kfree(bcap_dev->sensor_formats);
188 bcap_dev->sensor_formats = NULL;
189}
190
191static int bcap_open(struct file *file)
192{
193 struct bcap_device *bcap_dev = video_drvdata(file);
194 struct video_device *vfd = bcap_dev->video_dev;
195 struct bcap_fh *bcap_fh;
196
197 if (!bcap_dev->sd) {
198 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
199 return -ENODEV;
200 }
201
202 bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
203 if (!bcap_fh) {
204 v4l2_err(&bcap_dev->v4l2_dev,
205 "unable to allocate memory for file handle object\n");
206 return -ENOMEM;
207 }
208
209 v4l2_fh_init(&bcap_fh->fh, vfd);
210
211 /* store pointer to v4l2_fh in private_data member of file */
212 file->private_data = &bcap_fh->fh;
213 v4l2_fh_add(&bcap_fh->fh);
214 bcap_fh->io_allowed = false;
215 return 0;
216}
217
218static int bcap_release(struct file *file)
219{
220 struct bcap_device *bcap_dev = video_drvdata(file);
221 struct v4l2_fh *fh = file->private_data;
222 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
223
224 /* if this instance is doing IO */
225 if (bcap_fh->io_allowed)
226 vb2_queue_release(&bcap_dev->buffer_queue);
227
228 file->private_data = NULL;
229 v4l2_fh_del(&bcap_fh->fh);
230 v4l2_fh_exit(&bcap_fh->fh);
231 kfree(bcap_fh);
232 return 0;
233}
234
235static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
236{
237 struct bcap_device *bcap_dev = video_drvdata(file);
238
239 return vb2_mmap(&bcap_dev->buffer_queue, vma);
240}
241
242#ifndef CONFIG_MMU
243static unsigned long bcap_get_unmapped_area(struct file *file,
244 unsigned long addr,
245 unsigned long len,
246 unsigned long pgoff,
247 unsigned long flags)
248{
249 struct bcap_device *bcap_dev = video_drvdata(file);
250
251 return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
252 addr,
253 len,
254 pgoff,
255 flags);
256}
257#endif
258
259static unsigned int bcap_poll(struct file *file, poll_table *wait)
260{
261 struct bcap_device *bcap_dev = video_drvdata(file);
262
263 return vb2_poll(&bcap_dev->buffer_queue, file, wait);
264}
265
266static int bcap_queue_setup(struct vb2_queue *vq,
267 const struct v4l2_format *fmt,
268 unsigned int *nbuffers, unsigned int *nplanes,
269 unsigned int sizes[], void *alloc_ctxs[])
270{
271 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
272
273 if (*nbuffers < BCAP_MIN_NUM_BUF)
274 *nbuffers = BCAP_MIN_NUM_BUF;
275
276 *nplanes = 1;
277 sizes[0] = bcap_dev->fmt.sizeimage;
278 alloc_ctxs[0] = bcap_dev->alloc_ctx;
279
280 return 0;
281}
282
283static int bcap_buffer_init(struct vb2_buffer *vb)
284{
285 struct bcap_buffer *buf = to_bcap_vb(vb);
286
287 INIT_LIST_HEAD(&buf->list);
288 return 0;
289}
290
291static int bcap_buffer_prepare(struct vb2_buffer *vb)
292{
293 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
294 struct bcap_buffer *buf = to_bcap_vb(vb);
295 unsigned long size;
296
297 size = bcap_dev->fmt.sizeimage;
298 if (vb2_plane_size(vb, 0) < size) {
299 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
300 vb2_plane_size(vb, 0), size);
301 return -EINVAL;
302 }
303 vb2_set_plane_payload(&buf->vb, 0, size);
304
305 return 0;
306}
307
308static void bcap_buffer_queue(struct vb2_buffer *vb)
309{
310 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
311 struct bcap_buffer *buf = to_bcap_vb(vb);
312 unsigned long flags;
313
314 spin_lock_irqsave(&bcap_dev->lock, flags);
315 list_add_tail(&buf->list, &bcap_dev->dma_queue);
316 spin_unlock_irqrestore(&bcap_dev->lock, flags);
317}
318
319static void bcap_buffer_cleanup(struct vb2_buffer *vb)
320{
321 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
322 struct bcap_buffer *buf = to_bcap_vb(vb);
323 unsigned long flags;
324
325 spin_lock_irqsave(&bcap_dev->lock, flags);
326 list_del_init(&buf->list);
327 spin_unlock_irqrestore(&bcap_dev->lock, flags);
328}
329
330static void bcap_lock(struct vb2_queue *vq)
331{
332 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
333 mutex_lock(&bcap_dev->mutex);
334}
335
336static void bcap_unlock(struct vb2_queue *vq)
337{
338 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
339 mutex_unlock(&bcap_dev->mutex);
340}
341
342static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
343{
344 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
345 struct ppi_if *ppi = bcap_dev->ppi;
346 struct ppi_params params;
347 int ret;
348
349 /* enable streamon on the sub device */
350 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
351 if (ret && (ret != -ENOIOCTLCMD)) {
352 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
353 return ret;
354 }
355
356 /* set ppi params */
357 params.width = bcap_dev->fmt.width;
358 params.height = bcap_dev->fmt.height;
359 params.bpp = bcap_dev->bpp;
360 params.ppi_control = bcap_dev->cfg->ppi_control;
361 params.int_mask = bcap_dev->cfg->int_mask;
362 params.blank_clocks = bcap_dev->cfg->blank_clocks;
363 ret = ppi->ops->set_params(ppi, ¶ms);
364 if (ret < 0) {
365 v4l2_err(&bcap_dev->v4l2_dev,
366 "Error in setting ppi params\n");
367 return ret;
368 }
369
370 /* attach ppi DMA irq handler */
371 ret = ppi->ops->attach_irq(ppi, bcap_isr);
372 if (ret < 0) {
373 v4l2_err(&bcap_dev->v4l2_dev,
374 "Error in attaching interrupt handler\n");
375 return ret;
376 }
377
378 INIT_COMPLETION(bcap_dev->comp);
379 bcap_dev->stop = false;
380 return 0;
381}
382
383static int bcap_stop_streaming(struct vb2_queue *vq)
384{
385 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
386 struct ppi_if *ppi = bcap_dev->ppi;
387 int ret;
388
389 if (!vb2_is_streaming(vq))
390 return 0;
391
392 bcap_dev->stop = true;
393 wait_for_completion(&bcap_dev->comp);
394 ppi->ops->stop(ppi);
395 ppi->ops->detach_irq(ppi);
396 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
397 if (ret && (ret != -ENOIOCTLCMD))
398 v4l2_err(&bcap_dev->v4l2_dev,
399 "stream off failed in subdev\n");
400
401 /* release all active buffers */
402 while (!list_empty(&bcap_dev->dma_queue)) {
403 bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
404 struct bcap_buffer, list);
405 list_del(&bcap_dev->next_frm->list);
406 vb2_buffer_done(&bcap_dev->next_frm->vb, VB2_BUF_STATE_ERROR);
407 }
408 return 0;
409}
410
411static struct vb2_ops bcap_video_qops = {
412 .queue_setup = bcap_queue_setup,
413 .buf_init = bcap_buffer_init,
414 .buf_prepare = bcap_buffer_prepare,
415 .buf_cleanup = bcap_buffer_cleanup,
416 .buf_queue = bcap_buffer_queue,
417 .wait_prepare = bcap_unlock,
418 .wait_finish = bcap_lock,
419 .start_streaming = bcap_start_streaming,
420 .stop_streaming = bcap_stop_streaming,
421};
422
423static int bcap_reqbufs(struct file *file, void *priv,
424 struct v4l2_requestbuffers *req_buf)
425{
426 struct bcap_device *bcap_dev = video_drvdata(file);
427 struct vb2_queue *vq = &bcap_dev->buffer_queue;
428 struct v4l2_fh *fh = file->private_data;
429 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
430
431 if (vb2_is_busy(vq))
432 return -EBUSY;
433
434 bcap_fh->io_allowed = true;
435
436 return vb2_reqbufs(vq, req_buf);
437}
438
439static int bcap_querybuf(struct file *file, void *priv,
440 struct v4l2_buffer *buf)
441{
442 struct bcap_device *bcap_dev = video_drvdata(file);
443
444 return vb2_querybuf(&bcap_dev->buffer_queue, buf);
445}
446
447static int bcap_qbuf(struct file *file, void *priv,
448 struct v4l2_buffer *buf)
449{
450 struct bcap_device *bcap_dev = video_drvdata(file);
451 struct v4l2_fh *fh = file->private_data;
452 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
453
454 if (!bcap_fh->io_allowed)
455 return -EBUSY;
456
457 return vb2_qbuf(&bcap_dev->buffer_queue, buf);
458}
459
460static int bcap_dqbuf(struct file *file, void *priv,
461 struct v4l2_buffer *buf)
462{
463 struct bcap_device *bcap_dev = video_drvdata(file);
464 struct v4l2_fh *fh = file->private_data;
465 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
466
467 if (!bcap_fh->io_allowed)
468 return -EBUSY;
469
470 return vb2_dqbuf(&bcap_dev->buffer_queue,
471 buf, file->f_flags & O_NONBLOCK);
472}
473
474static irqreturn_t bcap_isr(int irq, void *dev_id)
475{
476 struct ppi_if *ppi = dev_id;
477 struct bcap_device *bcap_dev = ppi->priv;
478 struct timeval timevalue;
479 struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
480 dma_addr_t addr;
481
482 spin_lock(&bcap_dev->lock);
483
484 if (bcap_dev->cur_frm != bcap_dev->next_frm) {
485 do_gettimeofday(&timevalue);
486 vb->v4l2_buf.timestamp = timevalue;
487 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
488 bcap_dev->cur_frm = bcap_dev->next_frm;
489 }
490
491 ppi->ops->stop(ppi);
492
493 if (bcap_dev->stop) {
494 complete(&bcap_dev->comp);
495 } else {
496 if (!list_empty(&bcap_dev->dma_queue)) {
497 bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
498 struct bcap_buffer, list);
499 list_del(&bcap_dev->next_frm->list);
500 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->next_frm->vb, 0);
501 ppi->ops->update_addr(ppi, (unsigned long)addr);
502 }
503 ppi->ops->start(ppi);
504 }
505
506 spin_unlock(&bcap_dev->lock);
507
508 return IRQ_HANDLED;
509}
510
511static int bcap_streamon(struct file *file, void *priv,
512 enum v4l2_buf_type buf_type)
513{
514 struct bcap_device *bcap_dev = video_drvdata(file);
515 struct bcap_fh *fh = file->private_data;
516 struct ppi_if *ppi = bcap_dev->ppi;
517 dma_addr_t addr;
518 int ret;
519
520 if (!fh->io_allowed)
521 return -EBUSY;
522
523 /* call streamon to start streaming in videobuf */
524 ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
525 if (ret)
526 return ret;
527
528 /* if dma queue is empty, return error */
529 if (list_empty(&bcap_dev->dma_queue)) {
530 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
531 ret = -EINVAL;
532 goto err;
533 }
534
535 /* get the next frame from the dma queue */
536 bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
537 struct bcap_buffer, list);
538 bcap_dev->cur_frm = bcap_dev->next_frm;
539 /* remove buffer from the dma queue */
540 list_del(&bcap_dev->cur_frm->list);
541 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
542 /* update DMA address */
543 ppi->ops->update_addr(ppi, (unsigned long)addr);
544 /* enable ppi */
545 ppi->ops->start(ppi);
546
547 return 0;
548err:
549 vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
550 return ret;
551}
552
553static int bcap_streamoff(struct file *file, void *priv,
554 enum v4l2_buf_type buf_type)
555{
556 struct bcap_device *bcap_dev = video_drvdata(file);
557 struct bcap_fh *fh = file->private_data;
558
559 if (!fh->io_allowed)
560 return -EBUSY;
561
562 return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
563}
564
565static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
566{
567 struct bcap_device *bcap_dev = video_drvdata(file);
568
569 return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
570}
571
572static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
573{
574 struct bcap_device *bcap_dev = video_drvdata(file);
575
576 *std = bcap_dev->std;
577 return 0;
578}
579
580static int bcap_s_std(struct file *file, void *priv, v4l2_std_id *std)
581{
582 struct bcap_device *bcap_dev = video_drvdata(file);
583 int ret;
584
585 if (vb2_is_busy(&bcap_dev->buffer_queue))
586 return -EBUSY;
587
588 ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, *std);
589 if (ret < 0)
590 return ret;
591
592 bcap_dev->std = *std;
593 return 0;
594}
595
596static int bcap_enum_input(struct file *file, void *priv,
597 struct v4l2_input *input)
598{
599 struct bcap_device *bcap_dev = video_drvdata(file);
600 struct bfin_capture_config *config = bcap_dev->cfg;
601 int ret;
602 u32 status;
603
604 if (input->index >= config->num_inputs)
605 return -EINVAL;
606
607 *input = config->inputs[input->index];
608 /* get input status */
609 ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
610 if (!ret)
611 input->status = status;
612 return 0;
613}
614
615static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
616{
617 struct bcap_device *bcap_dev = video_drvdata(file);
618
619 *index = bcap_dev->cur_input;
620 return 0;
621}
622
623static int bcap_s_input(struct file *file, void *priv, unsigned int index)
624{
625 struct bcap_device *bcap_dev = video_drvdata(file);
626 struct bfin_capture_config *config = bcap_dev->cfg;
627 struct bcap_route *route;
628 int ret;
629
630 if (vb2_is_busy(&bcap_dev->buffer_queue))
631 return -EBUSY;
632
633 if (index >= config->num_inputs)
634 return -EINVAL;
635
636 route = &config->routes[index];
637 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
638 route->input, route->output, 0);
639 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
640 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
641 return ret;
642 }
643 bcap_dev->cur_input = index;
644 return 0;
645}
646
647static int bcap_try_format(struct bcap_device *bcap,
648 struct v4l2_pix_format *pixfmt,
649 enum v4l2_mbus_pixelcode *mbus_code,
650 int *bpp)
651{
652 struct bcap_format *sf = bcap->sensor_formats;
653 struct bcap_format *fmt = NULL;
654 struct v4l2_mbus_framefmt mbus_fmt;
655 int ret, i;
656
657 for (i = 0; i < bcap->num_sensor_formats; i++) {
658 fmt = &sf[i];
659 if (pixfmt->pixelformat == fmt->pixelformat)
660 break;
661 }
662 if (i == bcap->num_sensor_formats)
663 fmt = &sf[0];
664
665 if (mbus_code)
666 *mbus_code = fmt->mbus_code;
667 if (bpp)
668 *bpp = fmt->bpp;
669 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
670 ret = v4l2_subdev_call(bcap->sd, video,
671 try_mbus_fmt, &mbus_fmt);
672 if (ret < 0)
673 return ret;
674 v4l2_fill_pix_format(pixfmt, &mbus_fmt);
675 pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
676 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
677 return 0;
678}
679
680static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
681 struct v4l2_fmtdesc *fmt)
682{
683 struct bcap_device *bcap_dev = video_drvdata(file);
684 struct bcap_format *sf = bcap_dev->sensor_formats;
685
686 if (fmt->index >= bcap_dev->num_sensor_formats)
687 return -EINVAL;
688
689 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
690 strlcpy(fmt->description,
691 sf[fmt->index].desc,
692 sizeof(fmt->description));
693 fmt->pixelformat = sf[fmt->index].pixelformat;
694 return 0;
695}
696
697static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
698 struct v4l2_format *fmt)
699{
700 struct bcap_device *bcap_dev = video_drvdata(file);
701 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
702
703 return bcap_try_format(bcap_dev, pixfmt, NULL, NULL);
704}
705
706static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
707 struct v4l2_format *fmt)
708{
709 struct bcap_device *bcap_dev = video_drvdata(file);
710
711 fmt->fmt.pix = bcap_dev->fmt;
712 return 0;
713}
714
715static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
716 struct v4l2_format *fmt)
717{
718 struct bcap_device *bcap_dev = video_drvdata(file);
719 struct v4l2_mbus_framefmt mbus_fmt;
720 enum v4l2_mbus_pixelcode mbus_code;
721 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
722 int ret, bpp;
723
724 if (vb2_is_busy(&bcap_dev->buffer_queue))
725 return -EBUSY;
726
727 /* see if format works */
728 ret = bcap_try_format(bcap_dev, pixfmt, &mbus_code, &bpp);
729 if (ret < 0)
730 return ret;
731
732 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, mbus_code);
733 ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
734 if (ret < 0)
735 return ret;
736 bcap_dev->fmt = *pixfmt;
737 bcap_dev->bpp = bpp;
738 return 0;
739}
740
741static int bcap_querycap(struct file *file, void *priv,
742 struct v4l2_capability *cap)
743{
744 struct bcap_device *bcap_dev = video_drvdata(file);
745
746 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
747 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
748 strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
749 strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
750 return 0;
751}
752
753static int bcap_g_parm(struct file *file, void *fh,
754 struct v4l2_streamparm *a)
755{
756 struct bcap_device *bcap_dev = video_drvdata(file);
757
758 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
759 return -EINVAL;
760 return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
761}
762
763static int bcap_s_parm(struct file *file, void *fh,
764 struct v4l2_streamparm *a)
765{
766 struct bcap_device *bcap_dev = video_drvdata(file);
767
768 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
769 return -EINVAL;
770 return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
771}
772
773static int bcap_g_chip_ident(struct file *file, void *priv,
774 struct v4l2_dbg_chip_ident *chip)
775{
776 struct bcap_device *bcap_dev = video_drvdata(file);
777
778 chip->ident = V4L2_IDENT_NONE;
779 chip->revision = 0;
780 if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
781 chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
782 return -EINVAL;
783
784 return v4l2_subdev_call(bcap_dev->sd, core,
785 g_chip_ident, chip);
786}
787
788#ifdef CONFIG_VIDEO_ADV_DEBUG
789static int bcap_dbg_g_register(struct file *file, void *priv,
790 struct v4l2_dbg_register *reg)
791{
792 struct bcap_device *bcap_dev = video_drvdata(file);
793
794 return v4l2_subdev_call(bcap_dev->sd, core,
795 g_register, reg);
796}
797
798static int bcap_dbg_s_register(struct file *file, void *priv,
799 struct v4l2_dbg_register *reg)
800{
801 struct bcap_device *bcap_dev = video_drvdata(file);
802
803 return v4l2_subdev_call(bcap_dev->sd, core,
804 s_register, reg);
805}
806#endif
807
808static int bcap_log_status(struct file *file, void *priv)
809{
810 struct bcap_device *bcap_dev = video_drvdata(file);
811 /* status for sub devices */
812 v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
813 return 0;
814}
815
816static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
817 .vidioc_querycap = bcap_querycap,
818 .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap,
819 .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
820 .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap,
821 .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap,
822 .vidioc_enum_input = bcap_enum_input,
823 .vidioc_g_input = bcap_g_input,
824 .vidioc_s_input = bcap_s_input,
825 .vidioc_querystd = bcap_querystd,
826 .vidioc_s_std = bcap_s_std,
827 .vidioc_g_std = bcap_g_std,
828 .vidioc_reqbufs = bcap_reqbufs,
829 .vidioc_querybuf = bcap_querybuf,
830 .vidioc_qbuf = bcap_qbuf,
831 .vidioc_dqbuf = bcap_dqbuf,
832 .vidioc_streamon = bcap_streamon,
833 .vidioc_streamoff = bcap_streamoff,
834 .vidioc_g_parm = bcap_g_parm,
835 .vidioc_s_parm = bcap_s_parm,
836 .vidioc_g_chip_ident = bcap_g_chip_ident,
837#ifdef CONFIG_VIDEO_ADV_DEBUG
838 .vidioc_g_register = bcap_dbg_g_register,
839 .vidioc_s_register = bcap_dbg_s_register,
840#endif
841 .vidioc_log_status = bcap_log_status,
842};
843
844static struct v4l2_file_operations bcap_fops = {
845 .owner = THIS_MODULE,
846 .open = bcap_open,
847 .release = bcap_release,
848 .unlocked_ioctl = video_ioctl2,
849 .mmap = bcap_mmap,
850#ifndef CONFIG_MMU
851 .get_unmapped_area = bcap_get_unmapped_area,
852#endif
853 .poll = bcap_poll
854};
855
856static int __devinit bcap_probe(struct platform_device *pdev)
857{
858 struct bcap_device *bcap_dev;
859 struct video_device *vfd;
860 struct i2c_adapter *i2c_adap;
861 struct bfin_capture_config *config;
862 struct vb2_queue *q;
863 int ret;
864
865 config = pdev->dev.platform_data;
866 if (!config) {
867 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
868 return -ENODEV;
869 }
870
871 bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
872 if (!bcap_dev) {
873 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
874 return -ENOMEM;
875 }
876
877 bcap_dev->cfg = config;
878
879 bcap_dev->ppi = ppi_create_instance(config->ppi_info);
880 if (!bcap_dev->ppi) {
881 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
882 ret = -ENODEV;
883 goto err_free_dev;
884 }
885 bcap_dev->ppi->priv = bcap_dev;
886
887 bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
888 if (IS_ERR(bcap_dev->alloc_ctx)) {
889 ret = PTR_ERR(bcap_dev->alloc_ctx);
890 goto err_free_ppi;
891 }
892
893 vfd = video_device_alloc();
894 if (!vfd) {
895 ret = -ENOMEM;
896 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
897 goto err_cleanup_ctx;
898 }
899
900 /* initialize field of video device */
901 vfd->release = video_device_release;
902 vfd->fops = &bcap_fops;
903 vfd->ioctl_ops = &bcap_ioctl_ops;
904 vfd->tvnorms = 0;
905 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
906 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
907 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
908 bcap_dev->video_dev = vfd;
909
910 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
911 if (ret) {
912 v4l2_err(pdev->dev.driver,
913 "Unable to register v4l2 device\n");
914 goto err_release_vdev;
915 }
916 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
917
918 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
919 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
920 if (ret) {
921 v4l2_err(&bcap_dev->v4l2_dev,
922 "Unable to init control handler\n");
923 goto err_unreg_v4l2;
924 }
925
926 spin_lock_init(&bcap_dev->lock);
927 /* initialize queue */
928 q = &bcap_dev->buffer_queue;
929 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
930 q->io_modes = VB2_MMAP;
931 q->drv_priv = bcap_dev;
932 q->buf_struct_size = sizeof(struct bcap_buffer);
933 q->ops = &bcap_video_qops;
934 q->mem_ops = &vb2_dma_contig_memops;
935
936 vb2_queue_init(q);
937
938 mutex_init(&bcap_dev->mutex);
939 init_completion(&bcap_dev->comp);
940
941 /* init video dma queues */
942 INIT_LIST_HEAD(&bcap_dev->dma_queue);
943
944 vfd->lock = &bcap_dev->mutex;
945 /* Locking in file operations other than ioctl should be done
946 by the driver, not the V4L2 core.
947 This driver needs auditing so that this flag can be removed. */
948 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
949
950 /* register video device */
951 ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
952 if (ret) {
953 v4l2_err(&bcap_dev->v4l2_dev,
954 "Unable to register video device\n");
955 goto err_free_handler;
956 }
957 video_set_drvdata(bcap_dev->video_dev, bcap_dev);
958 v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
959 video_device_node_name(vfd));
960
961 /* load up the subdevice */
962 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
963 if (!i2c_adap) {
964 v4l2_err(&bcap_dev->v4l2_dev,
965 "Unable to find i2c adapter\n");
966 goto err_unreg_vdev;
967
968 }
969 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
970 i2c_adap,
971 &config->board_info,
972 NULL);
973 if (bcap_dev->sd) {
974 int i;
975 /* update tvnorms from the sub devices */
976 for (i = 0; i < config->num_inputs; i++)
977 vfd->tvnorms |= config->inputs[i].std;
978 } else {
979 v4l2_err(&bcap_dev->v4l2_dev,
980 "Unable to register sub device\n");
981 goto err_unreg_vdev;
982 }
983
984 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
985
986 /* now we can probe the default state */
987 if (vfd->tvnorms) {
988 v4l2_std_id std;
989 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
990 if (ret) {
991 v4l2_err(&bcap_dev->v4l2_dev,
992 "Unable to get std\n");
993 goto err_unreg_vdev;
994 }
995 bcap_dev->std = std;
996 }
997 ret = bcap_init_sensor_formats(bcap_dev);
998 if (ret) {
999 v4l2_err(&bcap_dev->v4l2_dev,
1000 "Unable to create sensor formats table\n");
1001 goto err_unreg_vdev;
1002 }
1003 return 0;
1004err_unreg_vdev:
1005 video_unregister_device(bcap_dev->video_dev);
1006 bcap_dev->video_dev = NULL;
1007err_free_handler:
1008 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1009err_unreg_v4l2:
1010 v4l2_device_unregister(&bcap_dev->v4l2_dev);
1011err_release_vdev:
1012 if (bcap_dev->video_dev)
1013 video_device_release(bcap_dev->video_dev);
1014err_cleanup_ctx:
1015 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1016err_free_ppi:
1017 ppi_delete_instance(bcap_dev->ppi);
1018err_free_dev:
1019 kfree(bcap_dev);
1020 return ret;
1021}
1022
1023static int __devexit bcap_remove(struct platform_device *pdev)
1024{
1025 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1026 struct bcap_device *bcap_dev = container_of(v4l2_dev,
1027 struct bcap_device, v4l2_dev);
1028
1029 bcap_free_sensor_formats(bcap_dev);
1030 video_unregister_device(bcap_dev->video_dev);
1031 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1032 v4l2_device_unregister(v4l2_dev);
1033 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1034 ppi_delete_instance(bcap_dev->ppi);
1035 kfree(bcap_dev);
1036 return 0;
1037}
1038
1039static struct platform_driver bcap_driver = {
1040 .driver = {
1041 .name = CAPTURE_DRV_NAME,
1042 .owner = THIS_MODULE,
1043 },
1044 .probe = bcap_probe,
1045 .remove = __devexit_p(bcap_remove),
1046};
1047
1048static __init int bcap_init(void)
1049{
1050 return platform_driver_register(&bcap_driver);
1051}
1052
1053static __exit void bcap_exit(void)
1054{
1055 platform_driver_unregister(&bcap_driver);
1056}
1057
1058module_init(bcap_init);
1059module_exit(bcap_exit);
1060
1061MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1062MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1063MODULE_LICENSE("GPL v2");