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[media] vivid: BT.2020 R'G'B' is limited range
[deliverable/linux.git] / drivers / media / platform / blackfin / bfin_capture.c
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-common.h>
36 #include <media/v4l2-ctrls.h>
37 #include <media/v4l2-device.h>
38 #include <media/v4l2-ioctl.h>
39 #include <media/videobuf2-dma-contig.h>
40
41 #include <asm/dma.h>
42
43 #include <media/blackfin/bfin_capture.h>
44 #include <media/blackfin/ppi.h>
45
46 #define CAPTURE_DRV_NAME "bfin_capture"
47 #define BCAP_MIN_NUM_BUF 2
48
49 struct bcap_format {
50 char *desc;
51 u32 pixelformat;
52 u32 mbus_code;
53 int bpp; /* bits per pixel */
54 int dlen; /* data length for ppi in bits */
55 };
56
57 struct bcap_buffer {
58 struct vb2_buffer vb;
59 struct list_head list;
60 };
61
62 struct 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 /* current selected dv_timings */
80 struct v4l2_dv_timings dv_timings;
81 /* used to store pixel format */
82 struct v4l2_pix_format fmt;
83 /* bits per pixel*/
84 int bpp;
85 /* data length for ppi in bits */
86 int dlen;
87 /* used to store sensor supported format */
88 struct bcap_format *sensor_formats;
89 /* number of sensor formats array */
90 int num_sensor_formats;
91 /* pointing to current video buffer */
92 struct bcap_buffer *cur_frm;
93 /* buffer queue used in videobuf2 */
94 struct vb2_queue buffer_queue;
95 /* allocator-specific contexts for each plane */
96 struct vb2_alloc_ctx *alloc_ctx;
97 /* queue of filled frames */
98 struct list_head dma_queue;
99 /* used in videobuf2 callback */
100 spinlock_t lock;
101 /* used to access capture device */
102 struct mutex mutex;
103 /* used to wait ppi to complete one transfer */
104 struct completion comp;
105 /* prepare to stop */
106 bool stop;
107 };
108
109 struct bcap_fh {
110 struct v4l2_fh fh;
111 /* indicates whether this file handle is doing IO */
112 bool io_allowed;
113 };
114
115 static const struct bcap_format bcap_formats[] = {
116 {
117 .desc = "YCbCr 4:2:2 Interleaved UYVY",
118 .pixelformat = V4L2_PIX_FMT_UYVY,
119 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
120 .bpp = 16,
121 .dlen = 8,
122 },
123 {
124 .desc = "YCbCr 4:2:2 Interleaved YUYV",
125 .pixelformat = V4L2_PIX_FMT_YUYV,
126 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
127 .bpp = 16,
128 .dlen = 8,
129 },
130 {
131 .desc = "YCbCr 4:2:2 Interleaved UYVY",
132 .pixelformat = V4L2_PIX_FMT_UYVY,
133 .mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
134 .bpp = 16,
135 .dlen = 16,
136 },
137 {
138 .desc = "RGB 565",
139 .pixelformat = V4L2_PIX_FMT_RGB565,
140 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
141 .bpp = 16,
142 .dlen = 8,
143 },
144 {
145 .desc = "RGB 444",
146 .pixelformat = V4L2_PIX_FMT_RGB444,
147 .mbus_code = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
148 .bpp = 16,
149 .dlen = 8,
150 },
151
152 };
153 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
154
155 static irqreturn_t bcap_isr(int irq, void *dev_id);
156
157 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
158 {
159 return container_of(vb, struct bcap_buffer, vb);
160 }
161
162 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
163 {
164 u32 code;
165 struct bcap_format *sf;
166 unsigned int num_formats = 0;
167 int i, j;
168
169 while (!v4l2_subdev_call(bcap_dev->sd, video,
170 enum_mbus_fmt, num_formats, &code))
171 num_formats++;
172 if (!num_formats)
173 return -ENXIO;
174
175 sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
176 if (!sf)
177 return -ENOMEM;
178
179 for (i = 0; i < num_formats; i++) {
180 v4l2_subdev_call(bcap_dev->sd, video,
181 enum_mbus_fmt, i, &code);
182 for (j = 0; j < BCAP_MAX_FMTS; j++)
183 if (code == bcap_formats[j].mbus_code)
184 break;
185 if (j == BCAP_MAX_FMTS) {
186 /* we don't allow this sensor working with our bridge */
187 kfree(sf);
188 return -EINVAL;
189 }
190 sf[i] = bcap_formats[j];
191 }
192 bcap_dev->sensor_formats = sf;
193 bcap_dev->num_sensor_formats = num_formats;
194 return 0;
195 }
196
197 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
198 {
199 bcap_dev->num_sensor_formats = 0;
200 kfree(bcap_dev->sensor_formats);
201 bcap_dev->sensor_formats = NULL;
202 }
203
204 static int bcap_open(struct file *file)
205 {
206 struct bcap_device *bcap_dev = video_drvdata(file);
207 struct video_device *vfd = bcap_dev->video_dev;
208 struct bcap_fh *bcap_fh;
209
210 if (!bcap_dev->sd) {
211 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
212 return -ENODEV;
213 }
214
215 bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
216 if (!bcap_fh) {
217 v4l2_err(&bcap_dev->v4l2_dev,
218 "unable to allocate memory for file handle object\n");
219 return -ENOMEM;
220 }
221
222 v4l2_fh_init(&bcap_fh->fh, vfd);
223
224 /* store pointer to v4l2_fh in private_data member of file */
225 file->private_data = &bcap_fh->fh;
226 v4l2_fh_add(&bcap_fh->fh);
227 bcap_fh->io_allowed = false;
228 return 0;
229 }
230
231 static int bcap_release(struct file *file)
232 {
233 struct bcap_device *bcap_dev = video_drvdata(file);
234 struct v4l2_fh *fh = file->private_data;
235 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
236
237 /* if this instance is doing IO */
238 if (bcap_fh->io_allowed)
239 vb2_queue_release(&bcap_dev->buffer_queue);
240
241 file->private_data = NULL;
242 v4l2_fh_del(&bcap_fh->fh);
243 v4l2_fh_exit(&bcap_fh->fh);
244 kfree(bcap_fh);
245 return 0;
246 }
247
248 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
249 {
250 struct bcap_device *bcap_dev = video_drvdata(file);
251 int ret;
252
253 if (mutex_lock_interruptible(&bcap_dev->mutex))
254 return -ERESTARTSYS;
255 ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
256 mutex_unlock(&bcap_dev->mutex);
257 return ret;
258 }
259
260 #ifndef CONFIG_MMU
261 static unsigned long bcap_get_unmapped_area(struct file *file,
262 unsigned long addr,
263 unsigned long len,
264 unsigned long pgoff,
265 unsigned long flags)
266 {
267 struct bcap_device *bcap_dev = video_drvdata(file);
268
269 return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
270 addr,
271 len,
272 pgoff,
273 flags);
274 }
275 #endif
276
277 static unsigned int bcap_poll(struct file *file, poll_table *wait)
278 {
279 struct bcap_device *bcap_dev = video_drvdata(file);
280 unsigned int res;
281
282 mutex_lock(&bcap_dev->mutex);
283 res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
284 mutex_unlock(&bcap_dev->mutex);
285 return res;
286 }
287
288 static int bcap_queue_setup(struct vb2_queue *vq,
289 const struct v4l2_format *fmt,
290 unsigned int *nbuffers, unsigned int *nplanes,
291 unsigned int sizes[], void *alloc_ctxs[])
292 {
293 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
294
295 if (*nbuffers < BCAP_MIN_NUM_BUF)
296 *nbuffers = BCAP_MIN_NUM_BUF;
297
298 *nplanes = 1;
299 sizes[0] = bcap_dev->fmt.sizeimage;
300 alloc_ctxs[0] = bcap_dev->alloc_ctx;
301
302 return 0;
303 }
304
305 static int bcap_buffer_init(struct vb2_buffer *vb)
306 {
307 struct bcap_buffer *buf = to_bcap_vb(vb);
308
309 INIT_LIST_HEAD(&buf->list);
310 return 0;
311 }
312
313 static int bcap_buffer_prepare(struct vb2_buffer *vb)
314 {
315 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
316 struct bcap_buffer *buf = to_bcap_vb(vb);
317 unsigned long size;
318
319 size = bcap_dev->fmt.sizeimage;
320 if (vb2_plane_size(vb, 0) < size) {
321 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
322 vb2_plane_size(vb, 0), size);
323 return -EINVAL;
324 }
325 vb2_set_plane_payload(&buf->vb, 0, size);
326
327 return 0;
328 }
329
330 static void bcap_buffer_queue(struct vb2_buffer *vb)
331 {
332 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
333 struct bcap_buffer *buf = to_bcap_vb(vb);
334 unsigned long flags;
335
336 spin_lock_irqsave(&bcap_dev->lock, flags);
337 list_add_tail(&buf->list, &bcap_dev->dma_queue);
338 spin_unlock_irqrestore(&bcap_dev->lock, flags);
339 }
340
341 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
342 {
343 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
344 struct bcap_buffer *buf = to_bcap_vb(vb);
345 unsigned long flags;
346
347 spin_lock_irqsave(&bcap_dev->lock, flags);
348 list_del_init(&buf->list);
349 spin_unlock_irqrestore(&bcap_dev->lock, flags);
350 }
351
352 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
353 {
354 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
355 struct ppi_if *ppi = bcap_dev->ppi;
356 struct ppi_params params;
357 int ret;
358
359 /* enable streamon on the sub device */
360 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
361 if (ret && (ret != -ENOIOCTLCMD)) {
362 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
363 return ret;
364 }
365
366 /* set ppi params */
367 params.width = bcap_dev->fmt.width;
368 params.height = bcap_dev->fmt.height;
369 params.bpp = bcap_dev->bpp;
370 params.dlen = bcap_dev->dlen;
371 params.ppi_control = bcap_dev->cfg->ppi_control;
372 params.int_mask = bcap_dev->cfg->int_mask;
373 if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
374 & V4L2_IN_CAP_DV_TIMINGS) {
375 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
376
377 params.hdelay = bt->hsync + bt->hbackporch;
378 params.vdelay = bt->vsync + bt->vbackporch;
379 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
380 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
381 } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
382 & V4L2_IN_CAP_STD) {
383 params.hdelay = 0;
384 params.vdelay = 0;
385 if (bcap_dev->std & V4L2_STD_525_60) {
386 params.line = 858;
387 params.frame = 525;
388 } else {
389 params.line = 864;
390 params.frame = 625;
391 }
392 } else {
393 params.hdelay = 0;
394 params.vdelay = 0;
395 params.line = params.width + bcap_dev->cfg->blank_pixels;
396 params.frame = params.height;
397 }
398 ret = ppi->ops->set_params(ppi, &params);
399 if (ret < 0) {
400 v4l2_err(&bcap_dev->v4l2_dev,
401 "Error in setting ppi params\n");
402 return ret;
403 }
404
405 /* attach ppi DMA irq handler */
406 ret = ppi->ops->attach_irq(ppi, bcap_isr);
407 if (ret < 0) {
408 v4l2_err(&bcap_dev->v4l2_dev,
409 "Error in attaching interrupt handler\n");
410 return ret;
411 }
412
413 reinit_completion(&bcap_dev->comp);
414 bcap_dev->stop = false;
415 return 0;
416 }
417
418 static void bcap_stop_streaming(struct vb2_queue *vq)
419 {
420 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
421 struct ppi_if *ppi = bcap_dev->ppi;
422 int ret;
423
424 bcap_dev->stop = true;
425 wait_for_completion(&bcap_dev->comp);
426 ppi->ops->stop(ppi);
427 ppi->ops->detach_irq(ppi);
428 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
429 if (ret && (ret != -ENOIOCTLCMD))
430 v4l2_err(&bcap_dev->v4l2_dev,
431 "stream off failed in subdev\n");
432
433 /* release all active buffers */
434 while (!list_empty(&bcap_dev->dma_queue)) {
435 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
436 struct bcap_buffer, list);
437 list_del_init(&bcap_dev->cur_frm->list);
438 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
439 }
440 }
441
442 static struct vb2_ops bcap_video_qops = {
443 .queue_setup = bcap_queue_setup,
444 .buf_init = bcap_buffer_init,
445 .buf_prepare = bcap_buffer_prepare,
446 .buf_cleanup = bcap_buffer_cleanup,
447 .buf_queue = bcap_buffer_queue,
448 .wait_prepare = vb2_ops_wait_prepare,
449 .wait_finish = vb2_ops_wait_finish,
450 .start_streaming = bcap_start_streaming,
451 .stop_streaming = bcap_stop_streaming,
452 };
453
454 static int bcap_reqbufs(struct file *file, void *priv,
455 struct v4l2_requestbuffers *req_buf)
456 {
457 struct bcap_device *bcap_dev = video_drvdata(file);
458 struct vb2_queue *vq = &bcap_dev->buffer_queue;
459 struct v4l2_fh *fh = file->private_data;
460 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
461
462 if (vb2_is_busy(vq))
463 return -EBUSY;
464
465 bcap_fh->io_allowed = true;
466
467 return vb2_reqbufs(vq, req_buf);
468 }
469
470 static int bcap_querybuf(struct file *file, void *priv,
471 struct v4l2_buffer *buf)
472 {
473 struct bcap_device *bcap_dev = video_drvdata(file);
474
475 return vb2_querybuf(&bcap_dev->buffer_queue, buf);
476 }
477
478 static int bcap_qbuf(struct file *file, void *priv,
479 struct v4l2_buffer *buf)
480 {
481 struct bcap_device *bcap_dev = video_drvdata(file);
482 struct v4l2_fh *fh = file->private_data;
483 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
484
485 if (!bcap_fh->io_allowed)
486 return -EBUSY;
487
488 return vb2_qbuf(&bcap_dev->buffer_queue, buf);
489 }
490
491 static int bcap_dqbuf(struct file *file, void *priv,
492 struct v4l2_buffer *buf)
493 {
494 struct bcap_device *bcap_dev = video_drvdata(file);
495 struct v4l2_fh *fh = file->private_data;
496 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
497
498 if (!bcap_fh->io_allowed)
499 return -EBUSY;
500
501 return vb2_dqbuf(&bcap_dev->buffer_queue,
502 buf, file->f_flags & O_NONBLOCK);
503 }
504
505 static irqreturn_t bcap_isr(int irq, void *dev_id)
506 {
507 struct ppi_if *ppi = dev_id;
508 struct bcap_device *bcap_dev = ppi->priv;
509 struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
510 dma_addr_t addr;
511
512 spin_lock(&bcap_dev->lock);
513
514 if (!list_empty(&bcap_dev->dma_queue)) {
515 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
516 if (ppi->err) {
517 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
518 ppi->err = false;
519 } else {
520 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
521 }
522 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
523 struct bcap_buffer, list);
524 list_del_init(&bcap_dev->cur_frm->list);
525 } else {
526 /* clear error flag, we will get a new frame */
527 if (ppi->err)
528 ppi->err = false;
529 }
530
531 ppi->ops->stop(ppi);
532
533 if (bcap_dev->stop) {
534 complete(&bcap_dev->comp);
535 } else {
536 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
537 ppi->ops->update_addr(ppi, (unsigned long)addr);
538 ppi->ops->start(ppi);
539 }
540
541 spin_unlock(&bcap_dev->lock);
542
543 return IRQ_HANDLED;
544 }
545
546 static int bcap_streamon(struct file *file, void *priv,
547 enum v4l2_buf_type buf_type)
548 {
549 struct bcap_device *bcap_dev = video_drvdata(file);
550 struct bcap_fh *fh = file->private_data;
551 struct ppi_if *ppi = bcap_dev->ppi;
552 dma_addr_t addr;
553 int ret;
554
555 if (!fh->io_allowed)
556 return -EBUSY;
557
558 /* call streamon to start streaming in videobuf */
559 ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
560 if (ret)
561 return ret;
562
563 /* if dma queue is empty, return error */
564 if (list_empty(&bcap_dev->dma_queue)) {
565 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
566 ret = -EINVAL;
567 goto err;
568 }
569
570 /* get the next frame from the dma queue */
571 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
572 struct bcap_buffer, list);
573 /* remove buffer from the dma queue */
574 list_del_init(&bcap_dev->cur_frm->list);
575 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
576 /* update DMA address */
577 ppi->ops->update_addr(ppi, (unsigned long)addr);
578 /* enable ppi */
579 ppi->ops->start(ppi);
580
581 return 0;
582 err:
583 vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
584 return ret;
585 }
586
587 static int bcap_streamoff(struct file *file, void *priv,
588 enum v4l2_buf_type buf_type)
589 {
590 struct bcap_device *bcap_dev = video_drvdata(file);
591 struct bcap_fh *fh = file->private_data;
592
593 if (!fh->io_allowed)
594 return -EBUSY;
595
596 return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
597 }
598
599 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
600 {
601 struct bcap_device *bcap_dev = video_drvdata(file);
602
603 return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
604 }
605
606 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
607 {
608 struct bcap_device *bcap_dev = video_drvdata(file);
609
610 *std = bcap_dev->std;
611 return 0;
612 }
613
614 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
615 {
616 struct bcap_device *bcap_dev = video_drvdata(file);
617 int ret;
618
619 if (vb2_is_busy(&bcap_dev->buffer_queue))
620 return -EBUSY;
621
622 ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
623 if (ret < 0)
624 return ret;
625
626 bcap_dev->std = std;
627 return 0;
628 }
629
630 static int bcap_enum_dv_timings(struct file *file, void *priv,
631 struct v4l2_enum_dv_timings *timings)
632 {
633 struct bcap_device *bcap_dev = video_drvdata(file);
634
635 timings->pad = 0;
636
637 return v4l2_subdev_call(bcap_dev->sd, pad,
638 enum_dv_timings, timings);
639 }
640
641 static int bcap_query_dv_timings(struct file *file, void *priv,
642 struct v4l2_dv_timings *timings)
643 {
644 struct bcap_device *bcap_dev = video_drvdata(file);
645
646 return v4l2_subdev_call(bcap_dev->sd, video,
647 query_dv_timings, timings);
648 }
649
650 static int bcap_g_dv_timings(struct file *file, void *priv,
651 struct v4l2_dv_timings *timings)
652 {
653 struct bcap_device *bcap_dev = video_drvdata(file);
654
655 *timings = bcap_dev->dv_timings;
656 return 0;
657 }
658
659 static int bcap_s_dv_timings(struct file *file, void *priv,
660 struct v4l2_dv_timings *timings)
661 {
662 struct bcap_device *bcap_dev = video_drvdata(file);
663 int ret;
664 if (vb2_is_busy(&bcap_dev->buffer_queue))
665 return -EBUSY;
666
667 ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
668 if (ret < 0)
669 return ret;
670
671 bcap_dev->dv_timings = *timings;
672 return 0;
673 }
674
675 static int bcap_enum_input(struct file *file, void *priv,
676 struct v4l2_input *input)
677 {
678 struct bcap_device *bcap_dev = video_drvdata(file);
679 struct bfin_capture_config *config = bcap_dev->cfg;
680 int ret;
681 u32 status;
682
683 if (input->index >= config->num_inputs)
684 return -EINVAL;
685
686 *input = config->inputs[input->index];
687 /* get input status */
688 ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
689 if (!ret)
690 input->status = status;
691 return 0;
692 }
693
694 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
695 {
696 struct bcap_device *bcap_dev = video_drvdata(file);
697
698 *index = bcap_dev->cur_input;
699 return 0;
700 }
701
702 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
703 {
704 struct bcap_device *bcap_dev = video_drvdata(file);
705 struct bfin_capture_config *config = bcap_dev->cfg;
706 struct bcap_route *route;
707 int ret;
708
709 if (vb2_is_busy(&bcap_dev->buffer_queue))
710 return -EBUSY;
711
712 if (index >= config->num_inputs)
713 return -EINVAL;
714
715 route = &config->routes[index];
716 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
717 route->input, route->output, 0);
718 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
719 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
720 return ret;
721 }
722 bcap_dev->cur_input = index;
723 /* if this route has specific config, update ppi control */
724 if (route->ppi_control)
725 config->ppi_control = route->ppi_control;
726 return 0;
727 }
728
729 static int bcap_try_format(struct bcap_device *bcap,
730 struct v4l2_pix_format *pixfmt,
731 struct bcap_format *bcap_fmt)
732 {
733 struct bcap_format *sf = bcap->sensor_formats;
734 struct bcap_format *fmt = NULL;
735 struct v4l2_mbus_framefmt mbus_fmt;
736 int ret, i;
737
738 for (i = 0; i < bcap->num_sensor_formats; i++) {
739 fmt = &sf[i];
740 if (pixfmt->pixelformat == fmt->pixelformat)
741 break;
742 }
743 if (i == bcap->num_sensor_formats)
744 fmt = &sf[0];
745
746 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
747 ret = v4l2_subdev_call(bcap->sd, video,
748 try_mbus_fmt, &mbus_fmt);
749 if (ret < 0)
750 return ret;
751 v4l2_fill_pix_format(pixfmt, &mbus_fmt);
752 if (bcap_fmt) {
753 for (i = 0; i < bcap->num_sensor_formats; i++) {
754 fmt = &sf[i];
755 if (mbus_fmt.code == fmt->mbus_code)
756 break;
757 }
758 *bcap_fmt = *fmt;
759 }
760 pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
761 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
762 return 0;
763 }
764
765 static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
766 struct v4l2_fmtdesc *fmt)
767 {
768 struct bcap_device *bcap_dev = video_drvdata(file);
769 struct bcap_format *sf = bcap_dev->sensor_formats;
770
771 if (fmt->index >= bcap_dev->num_sensor_formats)
772 return -EINVAL;
773
774 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
775 strlcpy(fmt->description,
776 sf[fmt->index].desc,
777 sizeof(fmt->description));
778 fmt->pixelformat = sf[fmt->index].pixelformat;
779 return 0;
780 }
781
782 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
783 struct v4l2_format *fmt)
784 {
785 struct bcap_device *bcap_dev = video_drvdata(file);
786 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
787
788 return bcap_try_format(bcap_dev, pixfmt, NULL);
789 }
790
791 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
792 struct v4l2_format *fmt)
793 {
794 struct bcap_device *bcap_dev = video_drvdata(file);
795
796 fmt->fmt.pix = bcap_dev->fmt;
797 return 0;
798 }
799
800 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
801 struct v4l2_format *fmt)
802 {
803 struct bcap_device *bcap_dev = video_drvdata(file);
804 struct v4l2_mbus_framefmt mbus_fmt;
805 struct bcap_format bcap_fmt;
806 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
807 int ret;
808
809 if (vb2_is_busy(&bcap_dev->buffer_queue))
810 return -EBUSY;
811
812 /* see if format works */
813 ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
814 if (ret < 0)
815 return ret;
816
817 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
818 ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
819 if (ret < 0)
820 return ret;
821 bcap_dev->fmt = *pixfmt;
822 bcap_dev->bpp = bcap_fmt.bpp;
823 bcap_dev->dlen = bcap_fmt.dlen;
824 return 0;
825 }
826
827 static int bcap_querycap(struct file *file, void *priv,
828 struct v4l2_capability *cap)
829 {
830 struct bcap_device *bcap_dev = video_drvdata(file);
831
832 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
833 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
834 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
835 strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
836 strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
837 return 0;
838 }
839
840 static int bcap_g_parm(struct file *file, void *fh,
841 struct v4l2_streamparm *a)
842 {
843 struct bcap_device *bcap_dev = video_drvdata(file);
844
845 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
846 return -EINVAL;
847 return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
848 }
849
850 static int bcap_s_parm(struct file *file, void *fh,
851 struct v4l2_streamparm *a)
852 {
853 struct bcap_device *bcap_dev = video_drvdata(file);
854
855 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
856 return -EINVAL;
857 return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
858 }
859
860 static int bcap_log_status(struct file *file, void *priv)
861 {
862 struct bcap_device *bcap_dev = video_drvdata(file);
863 /* status for sub devices */
864 v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
865 return 0;
866 }
867
868 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
869 .vidioc_querycap = bcap_querycap,
870 .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap,
871 .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
872 .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap,
873 .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap,
874 .vidioc_enum_input = bcap_enum_input,
875 .vidioc_g_input = bcap_g_input,
876 .vidioc_s_input = bcap_s_input,
877 .vidioc_querystd = bcap_querystd,
878 .vidioc_s_std = bcap_s_std,
879 .vidioc_g_std = bcap_g_std,
880 .vidioc_s_dv_timings = bcap_s_dv_timings,
881 .vidioc_g_dv_timings = bcap_g_dv_timings,
882 .vidioc_query_dv_timings = bcap_query_dv_timings,
883 .vidioc_enum_dv_timings = bcap_enum_dv_timings,
884 .vidioc_reqbufs = bcap_reqbufs,
885 .vidioc_querybuf = bcap_querybuf,
886 .vidioc_qbuf = bcap_qbuf,
887 .vidioc_dqbuf = bcap_dqbuf,
888 .vidioc_streamon = bcap_streamon,
889 .vidioc_streamoff = bcap_streamoff,
890 .vidioc_g_parm = bcap_g_parm,
891 .vidioc_s_parm = bcap_s_parm,
892 .vidioc_log_status = bcap_log_status,
893 };
894
895 static struct v4l2_file_operations bcap_fops = {
896 .owner = THIS_MODULE,
897 .open = bcap_open,
898 .release = bcap_release,
899 .unlocked_ioctl = video_ioctl2,
900 .mmap = bcap_mmap,
901 #ifndef CONFIG_MMU
902 .get_unmapped_area = bcap_get_unmapped_area,
903 #endif
904 .poll = bcap_poll
905 };
906
907 static int bcap_probe(struct platform_device *pdev)
908 {
909 struct bcap_device *bcap_dev;
910 struct video_device *vfd;
911 struct i2c_adapter *i2c_adap;
912 struct bfin_capture_config *config;
913 struct vb2_queue *q;
914 struct bcap_route *route;
915 int ret;
916
917 config = pdev->dev.platform_data;
918 if (!config || !config->num_inputs) {
919 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
920 return -ENODEV;
921 }
922
923 bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
924 if (!bcap_dev) {
925 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
926 return -ENOMEM;
927 }
928
929 bcap_dev->cfg = config;
930
931 bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
932 if (!bcap_dev->ppi) {
933 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
934 ret = -ENODEV;
935 goto err_free_dev;
936 }
937 bcap_dev->ppi->priv = bcap_dev;
938
939 bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
940 if (IS_ERR(bcap_dev->alloc_ctx)) {
941 ret = PTR_ERR(bcap_dev->alloc_ctx);
942 goto err_free_ppi;
943 }
944
945 vfd = video_device_alloc();
946 if (!vfd) {
947 ret = -ENOMEM;
948 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
949 goto err_cleanup_ctx;
950 }
951
952 /* initialize field of video device */
953 vfd->release = video_device_release;
954 vfd->fops = &bcap_fops;
955 vfd->ioctl_ops = &bcap_ioctl_ops;
956 vfd->tvnorms = 0;
957 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
958 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
959 bcap_dev->video_dev = vfd;
960
961 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
962 if (ret) {
963 v4l2_err(pdev->dev.driver,
964 "Unable to register v4l2 device\n");
965 goto err_release_vdev;
966 }
967 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
968
969 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
970 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
971 if (ret) {
972 v4l2_err(&bcap_dev->v4l2_dev,
973 "Unable to init control handler\n");
974 goto err_unreg_v4l2;
975 }
976
977 spin_lock_init(&bcap_dev->lock);
978 /* initialize queue */
979 q = &bcap_dev->buffer_queue;
980 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
981 q->io_modes = VB2_MMAP;
982 q->drv_priv = bcap_dev;
983 q->buf_struct_size = sizeof(struct bcap_buffer);
984 q->ops = &bcap_video_qops;
985 q->mem_ops = &vb2_dma_contig_memops;
986 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
987 q->lock = &bcap_dev->mutex;
988
989 ret = vb2_queue_init(q);
990 if (ret)
991 goto err_free_handler;
992
993 mutex_init(&bcap_dev->mutex);
994 init_completion(&bcap_dev->comp);
995
996 /* init video dma queues */
997 INIT_LIST_HEAD(&bcap_dev->dma_queue);
998
999 vfd->lock = &bcap_dev->mutex;
1000
1001 /* register video device */
1002 ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1003 if (ret) {
1004 v4l2_err(&bcap_dev->v4l2_dev,
1005 "Unable to register video device\n");
1006 goto err_free_handler;
1007 }
1008 video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1009 v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1010 video_device_node_name(vfd));
1011
1012 /* load up the subdevice */
1013 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1014 if (!i2c_adap) {
1015 v4l2_err(&bcap_dev->v4l2_dev,
1016 "Unable to find i2c adapter\n");
1017 ret = -ENODEV;
1018 goto err_unreg_vdev;
1019
1020 }
1021 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1022 i2c_adap,
1023 &config->board_info,
1024 NULL);
1025 if (bcap_dev->sd) {
1026 int i;
1027
1028 /* update tvnorms from the sub devices */
1029 for (i = 0; i < config->num_inputs; i++)
1030 vfd->tvnorms |= config->inputs[i].std;
1031 } else {
1032 v4l2_err(&bcap_dev->v4l2_dev,
1033 "Unable to register sub device\n");
1034 ret = -ENODEV;
1035 goto err_unreg_vdev;
1036 }
1037
1038 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1039
1040 /*
1041 * explicitly set input, otherwise some boards
1042 * may not work at the state as we expected
1043 */
1044 route = &config->routes[0];
1045 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1046 route->input, route->output, 0);
1047 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1048 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1049 goto err_unreg_vdev;
1050 }
1051 bcap_dev->cur_input = 0;
1052 /* if this route has specific config, update ppi control */
1053 if (route->ppi_control)
1054 config->ppi_control = route->ppi_control;
1055
1056 /* now we can probe the default state */
1057 if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1058 v4l2_std_id std;
1059 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
1060 if (ret) {
1061 v4l2_err(&bcap_dev->v4l2_dev,
1062 "Unable to get std\n");
1063 goto err_unreg_vdev;
1064 }
1065 bcap_dev->std = std;
1066 }
1067 if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1068 struct v4l2_dv_timings dv_timings;
1069 ret = v4l2_subdev_call(bcap_dev->sd, video,
1070 g_dv_timings, &dv_timings);
1071 if (ret) {
1072 v4l2_err(&bcap_dev->v4l2_dev,
1073 "Unable to get dv timings\n");
1074 goto err_unreg_vdev;
1075 }
1076 bcap_dev->dv_timings = dv_timings;
1077 }
1078 ret = bcap_init_sensor_formats(bcap_dev);
1079 if (ret) {
1080 v4l2_err(&bcap_dev->v4l2_dev,
1081 "Unable to create sensor formats table\n");
1082 goto err_unreg_vdev;
1083 }
1084 return 0;
1085 err_unreg_vdev:
1086 video_unregister_device(bcap_dev->video_dev);
1087 bcap_dev->video_dev = NULL;
1088 err_free_handler:
1089 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1090 err_unreg_v4l2:
1091 v4l2_device_unregister(&bcap_dev->v4l2_dev);
1092 err_release_vdev:
1093 if (bcap_dev->video_dev)
1094 video_device_release(bcap_dev->video_dev);
1095 err_cleanup_ctx:
1096 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1097 err_free_ppi:
1098 ppi_delete_instance(bcap_dev->ppi);
1099 err_free_dev:
1100 kfree(bcap_dev);
1101 return ret;
1102 }
1103
1104 static int bcap_remove(struct platform_device *pdev)
1105 {
1106 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1107 struct bcap_device *bcap_dev = container_of(v4l2_dev,
1108 struct bcap_device, v4l2_dev);
1109
1110 bcap_free_sensor_formats(bcap_dev);
1111 video_unregister_device(bcap_dev->video_dev);
1112 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1113 v4l2_device_unregister(v4l2_dev);
1114 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1115 ppi_delete_instance(bcap_dev->ppi);
1116 kfree(bcap_dev);
1117 return 0;
1118 }
1119
1120 static struct platform_driver bcap_driver = {
1121 .driver = {
1122 .name = CAPTURE_DRV_NAME,
1123 },
1124 .probe = bcap_probe,
1125 .remove = bcap_remove,
1126 };
1127 module_platform_driver(bcap_driver);
1128
1129 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1130 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1131 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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