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[media] v4l2: add const to argument of write-only s_register ioctl
[deliverable/linux.git] / drivers / media / platform / blackfin / bfin_capture.c
CommitLineData
63b1a90d
SJ		 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 */
45b82596 55 int dlen; /* data length for ppi in bits */
63b1a90d
SJ		 56};
57
58struct bcap_buffer {
59 struct vb2_buffer vb;
60 struct list_head list;
61};
62
63struct bcap_device {
64 /* capture device instance */
65 struct v4l2_device v4l2_dev;
66 /* v4l2 control handler */
67 struct v4l2_ctrl_handler ctrl_handler;
68 /* device node data */
69 struct video_device *video_dev;
70 /* sub device instance */
71 struct v4l2_subdev *sd;
72 /* capture config */
73 struct bfin_capture_config *cfg;
74 /* ppi interface */
75 struct ppi_if *ppi;
76 /* current input */
77 unsigned int cur_input;
78 /* current selected standard */
79 v4l2_std_id std;
45b82596
SJ		 80 /* current selected dv_timings */
81 struct v4l2_dv_timings dv_timings;
63b1a90d
SJ		 82 /* used to store pixel format */
83 struct v4l2_pix_format fmt;
84 /* bits per pixel*/
85 int bpp;
45b82596
SJ		 86 /* data length for ppi in bits */
87 int dlen;
63b1a90d
SJ		 88 /* used to store sensor supported format */
89 struct bcap_format *sensor_formats;
90 /* number of sensor formats array */
91 int num_sensor_formats;
92 /* pointing to current video buffer */
93 struct bcap_buffer *cur_frm;
63b1a90d
SJ		 94 /* buffer queue used in videobuf2 */
95 struct vb2_queue buffer_queue;
96 /* allocator-specific contexts for each plane */
97 struct vb2_alloc_ctx *alloc_ctx;
98 /* queue of filled frames */
99 struct list_head dma_queue;
100 /* used in videobuf2 callback */
101 spinlock_t lock;
102 /* used to access capture device */
103 struct mutex mutex;
104 /* used to wait ppi to complete one transfer */
105 struct completion comp;
106 /* prepare to stop */
107 bool stop;
108};
109
110struct bcap_fh {
111 struct v4l2_fh fh;
112 /* indicates whether this file handle is doing IO */
113 bool io_allowed;
114};
115
116static const struct bcap_format bcap_formats[] = {
117 {
118 .desc = "YCbCr 4:2:2 Interleaved UYVY",
119 .pixelformat = V4L2_PIX_FMT_UYVY,
120 .mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
121 .bpp = 16,
45b82596 122 .dlen = 8,
63b1a90d
SJ		 123 },
124 {
125 .desc = "YCbCr 4:2:2 Interleaved YUYV",
126 .pixelformat = V4L2_PIX_FMT_YUYV,
127 .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
128 .bpp = 16,
45b82596
SJ		 129 .dlen = 8,
130 },
131 {
132 .desc = "YCbCr 4:2:2 Interleaved UYVY",
133 .pixelformat = V4L2_PIX_FMT_UYVY,
134 .mbus_code = V4L2_MBUS_FMT_UYVY8_1X16,
135 .bpp = 16,
136 .dlen = 16,
63b1a90d
SJ		 137 },
138 {
139 .desc = "RGB 565",
140 .pixelformat = V4L2_PIX_FMT_RGB565,
141 .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE,
142 .bpp = 16,
45b82596 143 .dlen = 8,
63b1a90d
SJ		 144 },
145 {
146 .desc = "RGB 444",
147 .pixelformat = V4L2_PIX_FMT_RGB444,
148 .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
149 .bpp = 16,
45b82596 150 .dlen = 8,
63b1a90d
SJ		 151 },
152
153};
154#define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
155
156static irqreturn_t bcap_isr(int irq, void *dev_id);
157
158static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
159{
160 return container_of(vb, struct bcap_buffer, vb);
161}
162
163static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
164{
165 enum v4l2_mbus_pixelcode code;
166 struct bcap_format *sf;
167 unsigned int num_formats = 0;
168 int i, j;
169
170 while (!v4l2_subdev_call(bcap_dev->sd, video,
171 enum_mbus_fmt, num_formats, &code))
172 num_formats++;
173 if (!num_formats)
174 return -ENXIO;
175
176 sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
177 if (!sf)
178 return -ENOMEM;
179
180 for (i = 0; i < num_formats; i++) {
181 v4l2_subdev_call(bcap_dev->sd, video,
182 enum_mbus_fmt, i, &code);
183 for (j = 0; j < BCAP_MAX_FMTS; j++)
184 if (code == bcap_formats[j].mbus_code)
185 break;
186 if (j == BCAP_MAX_FMTS) {
187 /* we don't allow this sensor working with our bridge */
188 kfree(sf);
189 return -EINVAL;
190 }
191 sf[i] = bcap_formats[j];
192 }
193 bcap_dev->sensor_formats = sf;
194 bcap_dev->num_sensor_formats = num_formats;
195 return 0;
196}
197
198static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
199{
200 bcap_dev->num_sensor_formats = 0;
201 kfree(bcap_dev->sensor_formats);
202 bcap_dev->sensor_formats = NULL;
203}
204
205static int bcap_open(struct file *file)
206{
207 struct bcap_device *bcap_dev = video_drvdata(file);
208 struct video_device *vfd = bcap_dev->video_dev;
209 struct bcap_fh *bcap_fh;
210
211 if (!bcap_dev->sd) {
212 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
213 return -ENODEV;
214 }
215
216 bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
217 if (!bcap_fh) {
218 v4l2_err(&bcap_dev->v4l2_dev,
219 "unable to allocate memory for file handle object\n");
220 return -ENOMEM;
221 }
222
223 v4l2_fh_init(&bcap_fh->fh, vfd);
224
225 /* store pointer to v4l2_fh in private_data member of file */
226 file->private_data = &bcap_fh->fh;
227 v4l2_fh_add(&bcap_fh->fh);
228 bcap_fh->io_allowed = false;
229 return 0;
230}
231
232static int bcap_release(struct file *file)
233{
234 struct bcap_device *bcap_dev = video_drvdata(file);
235 struct v4l2_fh *fh = file->private_data;
236 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
237
238 /* if this instance is doing IO */
239 if (bcap_fh->io_allowed)
240 vb2_queue_release(&bcap_dev->buffer_queue);
241
242 file->private_data = NULL;
243 v4l2_fh_del(&bcap_fh->fh);
244 v4l2_fh_exit(&bcap_fh->fh);
245 kfree(bcap_fh);
246 return 0;
247}
248
249static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
250{
251 struct bcap_device *bcap_dev = video_drvdata(file);
28c3682a 252 int ret;
63b1a90d 253
28c3682a
HV		 254 if (mutex_lock_interruptible(&bcap_dev->mutex))
255 return -ERESTARTSYS;
256 ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
257 mutex_unlock(&bcap_dev->mutex);
258 return ret;
63b1a90d
SJ		 259}
260
261#ifndef CONFIG_MMU
262static unsigned long bcap_get_unmapped_area(struct file *file,
263 unsigned long addr,
264 unsigned long len,
265 unsigned long pgoff,
266 unsigned long flags)
267{
268 struct bcap_device *bcap_dev = video_drvdata(file);
269
270 return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
271 addr,
272 len,
273 pgoff,
274 flags);
275}
276#endif
277
278static unsigned int bcap_poll(struct file *file, poll_table *wait)
279{
280 struct bcap_device *bcap_dev = video_drvdata(file);
28c3682a 281 unsigned int res;
63b1a90d 282
28c3682a
HV		 283 mutex_lock(&bcap_dev->mutex);
284 res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
285 mutex_unlock(&bcap_dev->mutex);
286 return res;
63b1a90d
SJ		 287}
288
289static int bcap_queue_setup(struct vb2_queue *vq,
290 const struct v4l2_format *fmt,
291 unsigned int *nbuffers, unsigned int *nplanes,
292 unsigned int sizes[], void *alloc_ctxs[])
293{
294 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
295
296 if (*nbuffers < BCAP_MIN_NUM_BUF)
297 *nbuffers = BCAP_MIN_NUM_BUF;
298
299 *nplanes = 1;
300 sizes[0] = bcap_dev->fmt.sizeimage;
301 alloc_ctxs[0] = bcap_dev->alloc_ctx;
302
303 return 0;
304}
305
306static int bcap_buffer_init(struct vb2_buffer *vb)
307{
308 struct bcap_buffer *buf = to_bcap_vb(vb);
309
310 INIT_LIST_HEAD(&buf->list);
311 return 0;
312}
313
314static int bcap_buffer_prepare(struct vb2_buffer *vb)
315{
316 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
317 struct bcap_buffer *buf = to_bcap_vb(vb);
318 unsigned long size;
319
320 size = bcap_dev->fmt.sizeimage;
321 if (vb2_plane_size(vb, 0) < size) {
322 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
323 vb2_plane_size(vb, 0), size);
324 return -EINVAL;
325 }
326 vb2_set_plane_payload(&buf->vb, 0, size);
327
328 return 0;
329}
330
331static void bcap_buffer_queue(struct vb2_buffer *vb)
332{
333 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
334 struct bcap_buffer *buf = to_bcap_vb(vb);
335 unsigned long flags;
336
337 spin_lock_irqsave(&bcap_dev->lock, flags);
338 list_add_tail(&buf->list, &bcap_dev->dma_queue);
339 spin_unlock_irqrestore(&bcap_dev->lock, flags);
340}
341
342static void bcap_buffer_cleanup(struct vb2_buffer *vb)
343{
344 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
345 struct bcap_buffer *buf = to_bcap_vb(vb);
346 unsigned long flags;
347
348 spin_lock_irqsave(&bcap_dev->lock, flags);
349 list_del_init(&buf->list);
350 spin_unlock_irqrestore(&bcap_dev->lock, flags);
351}
352
353static void bcap_lock(struct vb2_queue *vq)
354{
355 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
356 mutex_lock(&bcap_dev->mutex);
357}
358
359static void bcap_unlock(struct vb2_queue *vq)
360{
361 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
362 mutex_unlock(&bcap_dev->mutex);
363}
364
365static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
366{
367 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
368 struct ppi_if *ppi = bcap_dev->ppi;
369 struct ppi_params params;
370 int ret;
371
372 /* enable streamon on the sub device */
373 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
374 if (ret && (ret != -ENOIOCTLCMD)) {
375 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
376 return ret;
377 }
378
379 /* set ppi params */
380 params.width = bcap_dev->fmt.width;
381 params.height = bcap_dev->fmt.height;
382 params.bpp = bcap_dev->bpp;
45b82596 383 params.dlen = bcap_dev->dlen;
63b1a90d
SJ		 384 params.ppi_control = bcap_dev->cfg->ppi_control;
385 params.int_mask = bcap_dev->cfg->int_mask;
45b82596 386 if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
a8451ed2 387 & V4L2_IN_CAP_DV_TIMINGS) {
45b82596
SJ		 388 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
389
390 params.hdelay = bt->hsync + bt->hbackporch;
391 params.vdelay = bt->vsync + bt->vbackporch;
392 params.line = bt->hfrontporch + bt->hsync
393 + bt->hbackporch + bt->width;
394 params.frame = bt->vfrontporch + bt->vsync
395 + bt->vbackporch + bt->height;
396 if (bt->interlaced)
397 params.frame += bt->il_vfrontporch + bt->il_vsync
398 + bt->il_vbackporch;
399 } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
400 & V4L2_IN_CAP_STD) {
401 params.hdelay = 0;
402 params.vdelay = 0;
403 if (bcap_dev->std & V4L2_STD_525_60) {
404 params.line = 858;
405 params.frame = 525;
406 } else {
407 params.line = 864;
408 params.frame = 625;
409 }
410 } else {
411 params.hdelay = 0;
412 params.vdelay = 0;
413 params.line = params.width + bcap_dev->cfg->blank_pixels;
414 params.frame = params.height;
415 }
63b1a90d
SJ		 416 ret = ppi->ops->set_params(ppi, &params);
417 if (ret < 0) {
418 v4l2_err(&bcap_dev->v4l2_dev,
419 "Error in setting ppi params\n");
420 return ret;
421 }
422
423 /* attach ppi DMA irq handler */
424 ret = ppi->ops->attach_irq(ppi, bcap_isr);
425 if (ret < 0) {
426 v4l2_err(&bcap_dev->v4l2_dev,
427 "Error in attaching interrupt handler\n");
428 return ret;
429 }
430
431 INIT_COMPLETION(bcap_dev->comp);
432 bcap_dev->stop = false;
433 return 0;
434}
435
436static int bcap_stop_streaming(struct vb2_queue *vq)
437{
438 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
439 struct ppi_if *ppi = bcap_dev->ppi;
440 int ret;
441
442 if (!vb2_is_streaming(vq))
443 return 0;
444
445 bcap_dev->stop = true;
446 wait_for_completion(&bcap_dev->comp);
447 ppi->ops->stop(ppi);
448 ppi->ops->detach_irq(ppi);
449 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
450 if (ret && (ret != -ENOIOCTLCMD))
451 v4l2_err(&bcap_dev->v4l2_dev,
452 "stream off failed in subdev\n");
453
454 /* release all active buffers */
455 while (!list_empty(&bcap_dev->dma_queue)) {
d78a4882 456 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
63b1a90d 457 struct bcap_buffer, list);
d78a4882
SJ		 458 list_del(&bcap_dev->cur_frm->list);
459 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
63b1a90d
SJ		 460 }
461 return 0;
462}
463
464static struct vb2_ops bcap_video_qops = {
465 .queue_setup = bcap_queue_setup,
466 .buf_init = bcap_buffer_init,
467 .buf_prepare = bcap_buffer_prepare,
468 .buf_cleanup = bcap_buffer_cleanup,
469 .buf_queue = bcap_buffer_queue,
470 .wait_prepare = bcap_unlock,
471 .wait_finish = bcap_lock,
472 .start_streaming = bcap_start_streaming,
473 .stop_streaming = bcap_stop_streaming,
474};
475
476static int bcap_reqbufs(struct file *file, void *priv,
477 struct v4l2_requestbuffers *req_buf)
478{
479 struct bcap_device *bcap_dev = video_drvdata(file);
480 struct vb2_queue *vq = &bcap_dev->buffer_queue;
481 struct v4l2_fh *fh = file->private_data;
482 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
483
484 if (vb2_is_busy(vq))
485 return -EBUSY;
486
487 bcap_fh->io_allowed = true;
488
489 return vb2_reqbufs(vq, req_buf);
490}
491
492static int bcap_querybuf(struct file *file, void *priv,
493 struct v4l2_buffer *buf)
494{
495 struct bcap_device *bcap_dev = video_drvdata(file);
496
497 return vb2_querybuf(&bcap_dev->buffer_queue, buf);
498}
499
500static int bcap_qbuf(struct file *file, void *priv,
501 struct v4l2_buffer *buf)
502{
503 struct bcap_device *bcap_dev = video_drvdata(file);
504 struct v4l2_fh *fh = file->private_data;
505 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
506
507 if (!bcap_fh->io_allowed)
508 return -EBUSY;
509
510 return vb2_qbuf(&bcap_dev->buffer_queue, buf);
511}
512
513static int bcap_dqbuf(struct file *file, void *priv,
514 struct v4l2_buffer *buf)
515{
516 struct bcap_device *bcap_dev = video_drvdata(file);
517 struct v4l2_fh *fh = file->private_data;
518 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
519
520 if (!bcap_fh->io_allowed)
521 return -EBUSY;
522
523 return vb2_dqbuf(&bcap_dev->buffer_queue,
524 buf, file->f_flags & O_NONBLOCK);
525}
526
527static irqreturn_t bcap_isr(int irq, void *dev_id)
528{
529 struct ppi_if *ppi = dev_id;
530 struct bcap_device *bcap_dev = ppi->priv;
63b1a90d
SJ		 531 struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
532 dma_addr_t addr;
533
534 spin_lock(&bcap_dev->lock);
535
d78a4882 536 if (!list_empty(&bcap_dev->dma_queue)) {
8e6057b5 537 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
d78a4882
SJ		 538 if (ppi->err) {
539 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
540 ppi->err = false;
541 } else {
542 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
543 }
544 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
545 struct bcap_buffer, list);
546 list_del(&bcap_dev->cur_frm->list);
547 } else {
548 /* clear error flag, we will get a new frame */
549 if (ppi->err)
550 ppi->err = false;
63b1a90d
SJ		 551 }
552
553 ppi->ops->stop(ppi);
554
555 if (bcap_dev->stop) {
556 complete(&bcap_dev->comp);
557 } else {
d78a4882
SJ		 558 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
559 ppi->ops->update_addr(ppi, (unsigned long)addr);
63b1a90d
SJ		 560 ppi->ops->start(ppi);
561 }
562
563 spin_unlock(&bcap_dev->lock);
564
565 return IRQ_HANDLED;
566}
567
568static int bcap_streamon(struct file *file, void *priv,
569 enum v4l2_buf_type buf_type)
570{
571 struct bcap_device *bcap_dev = video_drvdata(file);
572 struct bcap_fh *fh = file->private_data;
573 struct ppi_if *ppi = bcap_dev->ppi;
574 dma_addr_t addr;
575 int ret;
576
577 if (!fh->io_allowed)
578 return -EBUSY;
579
580 /* call streamon to start streaming in videobuf */
581 ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
582 if (ret)
583 return ret;
584
585 /* if dma queue is empty, return error */
586 if (list_empty(&bcap_dev->dma_queue)) {
587 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
588 ret = -EINVAL;
589 goto err;
590 }
591
592 /* get the next frame from the dma queue */
d78a4882 593 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
63b1a90d 594 struct bcap_buffer, list);
63b1a90d
SJ		 595 /* remove buffer from the dma queue */
596 list_del(&bcap_dev->cur_frm->list);
597 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
598 /* update DMA address */
599 ppi->ops->update_addr(ppi, (unsigned long)addr);
600 /* enable ppi */
601 ppi->ops->start(ppi);
602
603 return 0;
604err:
605 vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
606 return ret;
607}
608
609static int bcap_streamoff(struct file *file, void *priv,
610 enum v4l2_buf_type buf_type)
611{
612 struct bcap_device *bcap_dev = video_drvdata(file);
613 struct bcap_fh *fh = file->private_data;
614
615 if (!fh->io_allowed)
616 return -EBUSY;
617
618 return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
619}
620
621static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
622{
623 struct bcap_device *bcap_dev = video_drvdata(file);
624
625 return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
626}
627
628static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
629{
630 struct bcap_device *bcap_dev = video_drvdata(file);
631
632 *std = bcap_dev->std;
633 return 0;
634}
635
314527ac 636static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
63b1a90d
SJ		 637{
638 struct bcap_device *bcap_dev = video_drvdata(file);
639 int ret;
640
641 if (vb2_is_busy(&bcap_dev->buffer_queue))
642 return -EBUSY;
643
314527ac 644 ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, std);
63b1a90d
SJ		 645 if (ret < 0)
646 return ret;
647
314527ac 648 bcap_dev->std = std;
63b1a90d
SJ		 649 return 0;
650}
651
45b82596
SJ		 652static int bcap_g_dv_timings(struct file *file, void *priv,
653 struct v4l2_dv_timings *timings)
654{
655 struct bcap_device *bcap_dev = video_drvdata(file);
656 int ret;
657
658 ret = v4l2_subdev_call(bcap_dev->sd, video,
659 g_dv_timings, timings);
660 if (ret < 0)
661 return ret;
662
663 bcap_dev->dv_timings = *timings;
664 return 0;
665}
666
667static int bcap_s_dv_timings(struct file *file, void *priv,
668 struct v4l2_dv_timings *timings)
669{
670 struct bcap_device *bcap_dev = video_drvdata(file);
671 int ret;
672 if (vb2_is_busy(&bcap_dev->buffer_queue))
673 return -EBUSY;
674
675 ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
676 if (ret < 0)
677 return ret;
678
679 bcap_dev->dv_timings = *timings;
680 return 0;
681}
682
63b1a90d
SJ		 683static int bcap_enum_input(struct file *file, void *priv,
684 struct v4l2_input *input)
685{
686 struct bcap_device *bcap_dev = video_drvdata(file);
687 struct bfin_capture_config *config = bcap_dev->cfg;
688 int ret;
689 u32 status;
690
691 if (input->index >= config->num_inputs)
692 return -EINVAL;
693
694 *input = config->inputs[input->index];
695 /* get input status */
696 ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
697 if (!ret)
698 input->status = status;
699 return 0;
700}
701
702static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
703{
704 struct bcap_device *bcap_dev = video_drvdata(file);
705
706 *index = bcap_dev->cur_input;
707 return 0;
708}
709
710static int bcap_s_input(struct file *file, void *priv, unsigned int index)
711{
712 struct bcap_device *bcap_dev = video_drvdata(file);
713 struct bfin_capture_config *config = bcap_dev->cfg;
714 struct bcap_route *route;
715 int ret;
716
717 if (vb2_is_busy(&bcap_dev->buffer_queue))
718 return -EBUSY;
719
720 if (index >= config->num_inputs)
721 return -EINVAL;
722
723 route = &config->routes[index];
724 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
725 route->input, route->output, 0);
726 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
727 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
728 return ret;
729 }
730 bcap_dev->cur_input = index;
45b82596
SJ		 731 /* if this route has specific config, update ppi control */
732 if (route->ppi_control)
733 config->ppi_control = route->ppi_control;
63b1a90d
SJ		 734 return 0;
735}
736
737static int bcap_try_format(struct bcap_device *bcap,
738 struct v4l2_pix_format *pixfmt,
45b82596 739 struct bcap_format *bcap_fmt)
63b1a90d
SJ		 740{
741 struct bcap_format *sf = bcap->sensor_formats;
742 struct bcap_format *fmt = NULL;
743 struct v4l2_mbus_framefmt mbus_fmt;
744 int ret, i;
745
746 for (i = 0; i < bcap->num_sensor_formats; i++) {
747 fmt = &sf[i];
748 if (pixfmt->pixelformat == fmt->pixelformat)
749 break;
750 }
751 if (i == bcap->num_sensor_formats)
752 fmt = &sf[0];
753
63b1a90d
SJ		 754 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
755 ret = v4l2_subdev_call(bcap->sd, video,
756 try_mbus_fmt, &mbus_fmt);
757 if (ret < 0)
758 return ret;
759 v4l2_fill_pix_format(pixfmt, &mbus_fmt);
45b82596
SJ		 760 if (bcap_fmt) {
761 for (i = 0; i < bcap->num_sensor_formats; i++) {
762 fmt = &sf[i];
763 if (mbus_fmt.code == fmt->mbus_code)
764 break;
765 }
766 *bcap_fmt = *fmt;
767 }
63b1a90d
SJ		 768 pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
769 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
770 return 0;
771}
772
773static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
774 struct v4l2_fmtdesc *fmt)
775{
776 struct bcap_device *bcap_dev = video_drvdata(file);
777 struct bcap_format *sf = bcap_dev->sensor_formats;
778
779 if (fmt->index >= bcap_dev->num_sensor_formats)
780 return -EINVAL;
781
782 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
783 strlcpy(fmt->description,
784 sf[fmt->index].desc,
785 sizeof(fmt->description));
786 fmt->pixelformat = sf[fmt->index].pixelformat;
787 return 0;
788}
789
790static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
791 struct v4l2_format *fmt)
792{
793 struct bcap_device *bcap_dev = video_drvdata(file);
794 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
795
45b82596 796 return bcap_try_format(bcap_dev, pixfmt, NULL);
63b1a90d
SJ		 797}
798
799static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
800 struct v4l2_format *fmt)
801{
802 struct bcap_device *bcap_dev = video_drvdata(file);
803
804 fmt->fmt.pix = bcap_dev->fmt;
805 return 0;
806}
807
808static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
809 struct v4l2_format *fmt)
810{
811 struct bcap_device *bcap_dev = video_drvdata(file);
812 struct v4l2_mbus_framefmt mbus_fmt;
45b82596 813 struct bcap_format bcap_fmt;
63b1a90d 814 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
45b82596 815 int ret;
63b1a90d
SJ		 816
817 if (vb2_is_busy(&bcap_dev->buffer_queue))
818 return -EBUSY;
819
820 /* see if format works */
45b82596 821 ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
63b1a90d
SJ		 822 if (ret < 0)
823 return ret;
824
45b82596 825 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
63b1a90d
SJ		 826 ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
827 if (ret < 0)
828 return ret;
829 bcap_dev->fmt = *pixfmt;
45b82596
SJ		 830 bcap_dev->bpp = bcap_fmt.bpp;
831 bcap_dev->dlen = bcap_fmt.dlen;
63b1a90d
SJ		 832 return 0;
833}
834
835static int bcap_querycap(struct file *file, void *priv,
836 struct v4l2_capability *cap)
837{
838 struct bcap_device *bcap_dev = video_drvdata(file);
839
840 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
841 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
842 strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
843 strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
844 return 0;
845}
846
847static int bcap_g_parm(struct file *file, void *fh,
848 struct v4l2_streamparm *a)
849{
850 struct bcap_device *bcap_dev = video_drvdata(file);
851
852 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
853 return -EINVAL;
854 return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
855}
856
857static int bcap_s_parm(struct file *file, void *fh,
858 struct v4l2_streamparm *a)
859{
860 struct bcap_device *bcap_dev = video_drvdata(file);
861
862 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
863 return -EINVAL;
864 return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
865}
866
867static int bcap_g_chip_ident(struct file *file, void *priv,
868 struct v4l2_dbg_chip_ident *chip)
869{
870 struct bcap_device *bcap_dev = video_drvdata(file);
871
872 chip->ident = V4L2_IDENT_NONE;
873 chip->revision = 0;
874 if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
875 chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
876 return -EINVAL;
877
878 return v4l2_subdev_call(bcap_dev->sd, core,
879 g_chip_ident, chip);
880}
881
882#ifdef CONFIG_VIDEO_ADV_DEBUG
883static int bcap_dbg_g_register(struct file *file, void *priv,
884 struct v4l2_dbg_register *reg)
885{
886 struct bcap_device *bcap_dev = video_drvdata(file);
887
888 return v4l2_subdev_call(bcap_dev->sd, core,
889 g_register, reg);
890}
891
892static int bcap_dbg_s_register(struct file *file, void *priv,
977ba3b1 893 const struct v4l2_dbg_register *reg)
63b1a90d
SJ		 894{
895 struct bcap_device *bcap_dev = video_drvdata(file);
896
897 return v4l2_subdev_call(bcap_dev->sd, core,
898 s_register, reg);
899}
900#endif
901
902static int bcap_log_status(struct file *file, void *priv)
903{
904 struct bcap_device *bcap_dev = video_drvdata(file);
905 /* status for sub devices */
906 v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
907 return 0;
908}
909
910static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
911 .vidioc_querycap = bcap_querycap,
912 .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap,
913 .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
914 .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap,
915 .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap,
916 .vidioc_enum_input = bcap_enum_input,
917 .vidioc_g_input = bcap_g_input,
918 .vidioc_s_input = bcap_s_input,
919 .vidioc_querystd = bcap_querystd,
920 .vidioc_s_std = bcap_s_std,
921 .vidioc_g_std = bcap_g_std,
45b82596
SJ		 922 .vidioc_s_dv_timings = bcap_s_dv_timings,
923 .vidioc_g_dv_timings = bcap_g_dv_timings,
63b1a90d
SJ		 924 .vidioc_reqbufs = bcap_reqbufs,
925 .vidioc_querybuf = bcap_querybuf,
926 .vidioc_qbuf = bcap_qbuf,
927 .vidioc_dqbuf = bcap_dqbuf,
928 .vidioc_streamon = bcap_streamon,
929 .vidioc_streamoff = bcap_streamoff,
930 .vidioc_g_parm = bcap_g_parm,
931 .vidioc_s_parm = bcap_s_parm,
932 .vidioc_g_chip_ident = bcap_g_chip_ident,
933#ifdef CONFIG_VIDEO_ADV_DEBUG
934 .vidioc_g_register = bcap_dbg_g_register,
935 .vidioc_s_register = bcap_dbg_s_register,
936#endif
937 .vidioc_log_status = bcap_log_status,
938};
939
940static struct v4l2_file_operations bcap_fops = {
941 .owner = THIS_MODULE,
942 .open = bcap_open,
943 .release = bcap_release,
944 .unlocked_ioctl = video_ioctl2,
945 .mmap = bcap_mmap,
946#ifndef CONFIG_MMU
947 .get_unmapped_area = bcap_get_unmapped_area,
948#endif
949 .poll = bcap_poll
950};
951
4c62e976 952static int bcap_probe(struct platform_device *pdev)
63b1a90d
SJ		 953{
954 struct bcap_device *bcap_dev;
955 struct video_device *vfd;
956 struct i2c_adapter *i2c_adap;
957 struct bfin_capture_config *config;
958 struct vb2_queue *q;
45b82596 959 struct bcap_route *route;
63b1a90d
SJ		 960 int ret;
961
962 config = pdev->dev.platform_data;
963 if (!config) {
964 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
965 return -ENODEV;
966 }
967
968 bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
969 if (!bcap_dev) {
970 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
971 return -ENOMEM;
972 }
973
974 bcap_dev->cfg = config;
975
976 bcap_dev->ppi = ppi_create_instance(config->ppi_info);
977 if (!bcap_dev->ppi) {
978 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
979 ret = -ENODEV;
980 goto err_free_dev;
981 }
982 bcap_dev->ppi->priv = bcap_dev;
983
984 bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
985 if (IS_ERR(bcap_dev->alloc_ctx)) {
986 ret = PTR_ERR(bcap_dev->alloc_ctx);
987 goto err_free_ppi;
988 }
989
990 vfd = video_device_alloc();
991 if (!vfd) {
992 ret = -ENOMEM;
993 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
994 goto err_cleanup_ctx;
995 }
996
997 /* initialize field of video device */
998 vfd->release = video_device_release;
999 vfd->fops = &bcap_fops;
1000 vfd->ioctl_ops = &bcap_ioctl_ops;
1001 vfd->tvnorms = 0;
1002 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
1003 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
1004 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
1005 bcap_dev->video_dev = vfd;
1006
1007 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
1008 if (ret) {
1009 v4l2_err(pdev->dev.driver,
1010 "Unable to register v4l2 device\n");
1011 goto err_release_vdev;
1012 }
1013 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
1014
1015 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
1016 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
1017 if (ret) {
1018 v4l2_err(&bcap_dev->v4l2_dev,
1019 "Unable to init control handler\n");
1020 goto err_unreg_v4l2;
1021 }
1022
1023 spin_lock_init(&bcap_dev->lock);
1024 /* initialize queue */
1025 q = &bcap_dev->buffer_queue;
1026 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1027 q->io_modes = VB2_MMAP;
1028 q->drv_priv = bcap_dev;
1029 q->buf_struct_size = sizeof(struct bcap_buffer);
1030 q->ops = &bcap_video_qops;
1031 q->mem_ops = &vb2_dma_contig_memops;
6aa69f99 1032 q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
63b1a90d
SJ		 1033
1034 vb2_queue_init(q);
1035
1036 mutex_init(&bcap_dev->mutex);
1037 init_completion(&bcap_dev->comp);
1038
1039 /* init video dma queues */
1040 INIT_LIST_HEAD(&bcap_dev->dma_queue);
1041
1042 vfd->lock = &bcap_dev->mutex;
1043
1044 /* register video device */
1045 ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1046 if (ret) {
1047 v4l2_err(&bcap_dev->v4l2_dev,
1048 "Unable to register video device\n");
1049 goto err_free_handler;
1050 }
1051 video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1052 v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1053 video_device_node_name(vfd));
1054
1055 /* load up the subdevice */
1056 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1057 if (!i2c_adap) {
1058 v4l2_err(&bcap_dev->v4l2_dev,
1059 "Unable to find i2c adapter\n");
150a1363 1060 ret = -ENODEV;
63b1a90d
SJ		 1061 goto err_unreg_vdev;
1062
1063 }
1064 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1065 i2c_adap,
1066 &config->board_info,
1067 NULL);
1068 if (bcap_dev->sd) {
1069 int i;
45b82596
SJ		 1070 if (!config->num_inputs) {
1071 v4l2_err(&bcap_dev->v4l2_dev,
1072 "Unable to work without input\n");
1073 goto err_unreg_vdev;
1074 }
1075
63b1a90d
SJ		 1076 /* update tvnorms from the sub devices */
1077 for (i = 0; i < config->num_inputs; i++)
1078 vfd->tvnorms |= config->inputs[i].std;
1079 } else {
1080 v4l2_err(&bcap_dev->v4l2_dev,
1081 "Unable to register sub device\n");
1082 goto err_unreg_vdev;
1083 }
1084
1085 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1086
45b82596
SJ		 1087 /*
1088 * explicitly set input, otherwise some boards
1089 * may not work at the state as we expected
1090 */
1091 route = &config->routes[0];
1092 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1093 route->input, route->output, 0);
1094 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1095 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1096 goto err_unreg_vdev;
1097 }
1098 bcap_dev->cur_input = 0;
1099 /* if this route has specific config, update ppi control */
1100 if (route->ppi_control)
1101 config->ppi_control = route->ppi_control;
1102
63b1a90d 1103 /* now we can probe the default state */
45b82596 1104 if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
63b1a90d
SJ		 1105 v4l2_std_id std;
1106 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
1107 if (ret) {
1108 v4l2_err(&bcap_dev->v4l2_dev,
1109 "Unable to get std\n");
1110 goto err_unreg_vdev;
1111 }
1112 bcap_dev->std = std;
1113 }
a8451ed2 1114 if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
45b82596
SJ		 1115 struct v4l2_dv_timings dv_timings;
1116 ret = v4l2_subdev_call(bcap_dev->sd, video,
1117 g_dv_timings, &dv_timings);
1118 if (ret) {
1119 v4l2_err(&bcap_dev->v4l2_dev,
1120 "Unable to get dv timings\n");
1121 goto err_unreg_vdev;
1122 }
1123 bcap_dev->dv_timings = dv_timings;
1124 }
63b1a90d
SJ		 1125 ret = bcap_init_sensor_formats(bcap_dev);
1126 if (ret) {
1127 v4l2_err(&bcap_dev->v4l2_dev,
1128 "Unable to create sensor formats table\n");
1129 goto err_unreg_vdev;
1130 }
1131 return 0;
1132err_unreg_vdev:
1133 video_unregister_device(bcap_dev->video_dev);
1134 bcap_dev->video_dev = NULL;
1135err_free_handler:
1136 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1137err_unreg_v4l2:
1138 v4l2_device_unregister(&bcap_dev->v4l2_dev);
1139err_release_vdev:
1140 if (bcap_dev->video_dev)
1141 video_device_release(bcap_dev->video_dev);
1142err_cleanup_ctx:
1143 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1144err_free_ppi:
1145 ppi_delete_instance(bcap_dev->ppi);
1146err_free_dev:
1147 kfree(bcap_dev);
1148 return ret;
1149}
1150
4c62e976 1151static int bcap_remove(struct platform_device *pdev)
63b1a90d
SJ		 1152{
1153 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1154 struct bcap_device *bcap_dev = container_of(v4l2_dev,
1155 struct bcap_device, v4l2_dev);
1156
1157 bcap_free_sensor_formats(bcap_dev);
1158 video_unregister_device(bcap_dev->video_dev);
1159 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1160 v4l2_device_unregister(v4l2_dev);
1161 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1162 ppi_delete_instance(bcap_dev->ppi);
1163 kfree(bcap_dev);
1164 return 0;
1165}
1166
1167static struct platform_driver bcap_driver = {
1168 .driver = {
1169 .name = CAPTURE_DRV_NAME,
1170 .owner = THIS_MODULE,
1171 },
1172 .probe = bcap_probe,
4c62e976 1173 .remove = bcap_remove,
63b1a90d 1174};
7f2b3a7d 1175module_platform_driver(bcap_driver);
63b1a90d
SJ		 1176
1177MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1178MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1179MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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