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[media] v4l2: replace s_mbus_fmt by set_fmt in bridge drivers
[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
48 struct bcap_format {
49 char *desc;
50 u32 pixelformat;
51 u32 mbus_code;
52 int bpp; /* bits per pixel */
53 int dlen; /* data length for ppi in bits */
54 };
55
56 struct bcap_buffer {
57 struct vb2_buffer vb;
58 struct list_head list;
59 };
60
61 struct bcap_device {
62 /* capture device instance */
63 struct v4l2_device v4l2_dev;
64 /* v4l2 control handler */
65 struct v4l2_ctrl_handler ctrl_handler;
66 /* device node data */
67 struct video_device video_dev;
68 /* sub device instance */
69 struct v4l2_subdev *sd;
70 /* capture config */
71 struct bfin_capture_config *cfg;
72 /* ppi interface */
73 struct ppi_if *ppi;
74 /* current input */
75 unsigned int cur_input;
76 /* current selected standard */
77 v4l2_std_id std;
78 /* current selected dv_timings */
79 struct v4l2_dv_timings dv_timings;
80 /* used to store pixel format */
81 struct v4l2_pix_format fmt;
82 /* bits per pixel*/
83 int bpp;
84 /* data length for ppi in bits */
85 int dlen;
86 /* used to store sensor supported format */
87 struct bcap_format *sensor_formats;
88 /* number of sensor formats array */
89 int num_sensor_formats;
90 /* pointing to current video buffer */
91 struct bcap_buffer *cur_frm;
92 /* buffer queue used in videobuf2 */
93 struct vb2_queue buffer_queue;
94 /* allocator-specific contexts for each plane */
95 struct vb2_alloc_ctx *alloc_ctx;
96 /* queue of filled frames */
97 struct list_head dma_queue;
98 /* used in videobuf2 callback */
99 spinlock_t lock;
100 /* used to access capture device */
101 struct mutex mutex;
102 /* used to wait ppi to complete one transfer */
103 struct completion comp;
104 /* prepare to stop */
105 bool stop;
106 /* vb2 buffer sequence counter */
107 unsigned sequence;
108 };
109
110 static const struct bcap_format bcap_formats[] = {
111 {
112 .desc = "YCbCr 4:2:2 Interleaved UYVY",
113 .pixelformat = V4L2_PIX_FMT_UYVY,
114 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
115 .bpp = 16,
116 .dlen = 8,
117 },
118 {
119 .desc = "YCbCr 4:2:2 Interleaved YUYV",
120 .pixelformat = V4L2_PIX_FMT_YUYV,
121 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
122 .bpp = 16,
123 .dlen = 8,
124 },
125 {
126 .desc = "YCbCr 4:2:2 Interleaved UYVY",
127 .pixelformat = V4L2_PIX_FMT_UYVY,
128 .mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
129 .bpp = 16,
130 .dlen = 16,
131 },
132 {
133 .desc = "RGB 565",
134 .pixelformat = V4L2_PIX_FMT_RGB565,
135 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
136 .bpp = 16,
137 .dlen = 8,
138 },
139 {
140 .desc = "RGB 444",
141 .pixelformat = V4L2_PIX_FMT_RGB444,
142 .mbus_code = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
143 .bpp = 16,
144 .dlen = 8,
145 },
146
147 };
148 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
149
150 static irqreturn_t bcap_isr(int irq, void *dev_id);
151
152 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
153 {
154 return container_of(vb, struct bcap_buffer, vb);
155 }
156
157 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
158 {
159 struct v4l2_subdev_mbus_code_enum code = {
160 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
161 };
162 struct bcap_format *sf;
163 unsigned int num_formats = 0;
164 int i, j;
165
166 while (!v4l2_subdev_call(bcap_dev->sd, pad,
167 enum_mbus_code, NULL, &code)) {
168 num_formats++;
169 code.index++;
170 }
171 if (!num_formats)
172 return -ENXIO;
173
174 sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
175 if (!sf)
176 return -ENOMEM;
177
178 for (i = 0; i < num_formats; i++) {
179 code.index = i;
180 v4l2_subdev_call(bcap_dev->sd, pad,
181 enum_mbus_code, NULL, &code);
182 for (j = 0; j < BCAP_MAX_FMTS; j++)
183 if (code.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_queue_setup(struct vb2_queue *vq,
205 const struct v4l2_format *fmt,
206 unsigned int *nbuffers, unsigned int *nplanes,
207 unsigned int sizes[], void *alloc_ctxs[])
208 {
209 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
210
211 if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
212 return -EINVAL;
213
214 if (vq->num_buffers + *nbuffers < 2)
215 *nbuffers = 2;
216
217 *nplanes = 1;
218 sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
219 alloc_ctxs[0] = bcap_dev->alloc_ctx;
220
221 return 0;
222 }
223
224 static int bcap_buffer_prepare(struct vb2_buffer *vb)
225 {
226 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
227 unsigned long size = bcap_dev->fmt.sizeimage;
228
229 if (vb2_plane_size(vb, 0) < size) {
230 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
231 vb2_plane_size(vb, 0), size);
232 return -EINVAL;
233 }
234 vb2_set_plane_payload(vb, 0, size);
235
236 vb->v4l2_buf.field = bcap_dev->fmt.field;
237
238 return 0;
239 }
240
241 static void bcap_buffer_queue(struct vb2_buffer *vb)
242 {
243 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
244 struct bcap_buffer *buf = to_bcap_vb(vb);
245 unsigned long flags;
246
247 spin_lock_irqsave(&bcap_dev->lock, flags);
248 list_add_tail(&buf->list, &bcap_dev->dma_queue);
249 spin_unlock_irqrestore(&bcap_dev->lock, flags);
250 }
251
252 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
253 {
254 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
255 struct bcap_buffer *buf = to_bcap_vb(vb);
256 unsigned long flags;
257
258 spin_lock_irqsave(&bcap_dev->lock, flags);
259 list_del_init(&buf->list);
260 spin_unlock_irqrestore(&bcap_dev->lock, flags);
261 }
262
263 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
264 {
265 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
266 struct ppi_if *ppi = bcap_dev->ppi;
267 struct bcap_buffer *buf, *tmp;
268 struct ppi_params params;
269 dma_addr_t addr;
270 int ret;
271
272 /* enable streamon on the sub device */
273 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
274 if (ret && (ret != -ENOIOCTLCMD)) {
275 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
276 goto err;
277 }
278
279 /* set ppi params */
280 params.width = bcap_dev->fmt.width;
281 params.height = bcap_dev->fmt.height;
282 params.bpp = bcap_dev->bpp;
283 params.dlen = bcap_dev->dlen;
284 params.ppi_control = bcap_dev->cfg->ppi_control;
285 params.int_mask = bcap_dev->cfg->int_mask;
286 if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
287 & V4L2_IN_CAP_DV_TIMINGS) {
288 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
289
290 params.hdelay = bt->hsync + bt->hbackporch;
291 params.vdelay = bt->vsync + bt->vbackporch;
292 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
293 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
294 } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
295 & V4L2_IN_CAP_STD) {
296 params.hdelay = 0;
297 params.vdelay = 0;
298 if (bcap_dev->std & V4L2_STD_525_60) {
299 params.line = 858;
300 params.frame = 525;
301 } else {
302 params.line = 864;
303 params.frame = 625;
304 }
305 } else {
306 params.hdelay = 0;
307 params.vdelay = 0;
308 params.line = params.width + bcap_dev->cfg->blank_pixels;
309 params.frame = params.height;
310 }
311 ret = ppi->ops->set_params(ppi, &params);
312 if (ret < 0) {
313 v4l2_err(&bcap_dev->v4l2_dev,
314 "Error in setting ppi params\n");
315 goto err;
316 }
317
318 /* attach ppi DMA irq handler */
319 ret = ppi->ops->attach_irq(ppi, bcap_isr);
320 if (ret < 0) {
321 v4l2_err(&bcap_dev->v4l2_dev,
322 "Error in attaching interrupt handler\n");
323 goto err;
324 }
325
326 bcap_dev->sequence = 0;
327
328 reinit_completion(&bcap_dev->comp);
329 bcap_dev->stop = false;
330
331 /* get the next frame from the dma queue */
332 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
333 struct bcap_buffer, list);
334 /* remove buffer from the dma queue */
335 list_del_init(&bcap_dev->cur_frm->list);
336 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
337 /* update DMA address */
338 ppi->ops->update_addr(ppi, (unsigned long)addr);
339 /* enable ppi */
340 ppi->ops->start(ppi);
341
342 return 0;
343
344 err:
345 list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
346 list_del(&buf->list);
347 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
348 }
349
350 return ret;
351 }
352
353 static void bcap_stop_streaming(struct vb2_queue *vq)
354 {
355 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
356 struct ppi_if *ppi = bcap_dev->ppi;
357 int ret;
358
359 bcap_dev->stop = true;
360 wait_for_completion(&bcap_dev->comp);
361 ppi->ops->stop(ppi);
362 ppi->ops->detach_irq(ppi);
363 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
364 if (ret && (ret != -ENOIOCTLCMD))
365 v4l2_err(&bcap_dev->v4l2_dev,
366 "stream off failed in subdev\n");
367
368 /* release all active buffers */
369 if (bcap_dev->cur_frm)
370 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
371
372 while (!list_empty(&bcap_dev->dma_queue)) {
373 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
374 struct bcap_buffer, list);
375 list_del_init(&bcap_dev->cur_frm->list);
376 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
377 }
378 }
379
380 static struct vb2_ops bcap_video_qops = {
381 .queue_setup = bcap_queue_setup,
382 .buf_prepare = bcap_buffer_prepare,
383 .buf_cleanup = bcap_buffer_cleanup,
384 .buf_queue = bcap_buffer_queue,
385 .wait_prepare = vb2_ops_wait_prepare,
386 .wait_finish = vb2_ops_wait_finish,
387 .start_streaming = bcap_start_streaming,
388 .stop_streaming = bcap_stop_streaming,
389 };
390
391 static irqreturn_t bcap_isr(int irq, void *dev_id)
392 {
393 struct ppi_if *ppi = dev_id;
394 struct bcap_device *bcap_dev = ppi->priv;
395 struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
396 dma_addr_t addr;
397
398 spin_lock(&bcap_dev->lock);
399
400 if (!list_empty(&bcap_dev->dma_queue)) {
401 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
402 if (ppi->err) {
403 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
404 ppi->err = false;
405 } else {
406 vb->v4l2_buf.sequence = bcap_dev->sequence++;
407 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
408 }
409 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
410 struct bcap_buffer, list);
411 list_del_init(&bcap_dev->cur_frm->list);
412 } else {
413 /* clear error flag, we will get a new frame */
414 if (ppi->err)
415 ppi->err = false;
416 }
417
418 ppi->ops->stop(ppi);
419
420 if (bcap_dev->stop) {
421 complete(&bcap_dev->comp);
422 } else {
423 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
424 ppi->ops->update_addr(ppi, (unsigned long)addr);
425 ppi->ops->start(ppi);
426 }
427
428 spin_unlock(&bcap_dev->lock);
429
430 return IRQ_HANDLED;
431 }
432
433 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
434 {
435 struct bcap_device *bcap_dev = video_drvdata(file);
436 struct v4l2_input input;
437
438 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
439 if (!(input.capabilities & V4L2_IN_CAP_STD))
440 return -ENODATA;
441
442 return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
443 }
444
445 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
446 {
447 struct bcap_device *bcap_dev = video_drvdata(file);
448 struct v4l2_input input;
449
450 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
451 if (!(input.capabilities & V4L2_IN_CAP_STD))
452 return -ENODATA;
453
454 *std = bcap_dev->std;
455 return 0;
456 }
457
458 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
459 {
460 struct bcap_device *bcap_dev = video_drvdata(file);
461 struct v4l2_input input;
462 int ret;
463
464 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
465 if (!(input.capabilities & V4L2_IN_CAP_STD))
466 return -ENODATA;
467
468 if (vb2_is_busy(&bcap_dev->buffer_queue))
469 return -EBUSY;
470
471 ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
472 if (ret < 0)
473 return ret;
474
475 bcap_dev->std = std;
476 return 0;
477 }
478
479 static int bcap_enum_dv_timings(struct file *file, void *priv,
480 struct v4l2_enum_dv_timings *timings)
481 {
482 struct bcap_device *bcap_dev = video_drvdata(file);
483 struct v4l2_input input;
484
485 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
486 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
487 return -ENODATA;
488
489 timings->pad = 0;
490
491 return v4l2_subdev_call(bcap_dev->sd, pad,
492 enum_dv_timings, timings);
493 }
494
495 static int bcap_query_dv_timings(struct file *file, void *priv,
496 struct v4l2_dv_timings *timings)
497 {
498 struct bcap_device *bcap_dev = video_drvdata(file);
499 struct v4l2_input input;
500
501 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
502 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
503 return -ENODATA;
504
505 return v4l2_subdev_call(bcap_dev->sd, video,
506 query_dv_timings, timings);
507 }
508
509 static int bcap_g_dv_timings(struct file *file, void *priv,
510 struct v4l2_dv_timings *timings)
511 {
512 struct bcap_device *bcap_dev = video_drvdata(file);
513 struct v4l2_input input;
514
515 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
516 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
517 return -ENODATA;
518
519 *timings = bcap_dev->dv_timings;
520 return 0;
521 }
522
523 static int bcap_s_dv_timings(struct file *file, void *priv,
524 struct v4l2_dv_timings *timings)
525 {
526 struct bcap_device *bcap_dev = video_drvdata(file);
527 struct v4l2_input input;
528 int ret;
529
530 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
531 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
532 return -ENODATA;
533
534 if (vb2_is_busy(&bcap_dev->buffer_queue))
535 return -EBUSY;
536
537 ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
538 if (ret < 0)
539 return ret;
540
541 bcap_dev->dv_timings = *timings;
542 return 0;
543 }
544
545 static int bcap_enum_input(struct file *file, void *priv,
546 struct v4l2_input *input)
547 {
548 struct bcap_device *bcap_dev = video_drvdata(file);
549 struct bfin_capture_config *config = bcap_dev->cfg;
550 int ret;
551 u32 status;
552
553 if (input->index >= config->num_inputs)
554 return -EINVAL;
555
556 *input = config->inputs[input->index];
557 /* get input status */
558 ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
559 if (!ret)
560 input->status = status;
561 return 0;
562 }
563
564 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
565 {
566 struct bcap_device *bcap_dev = video_drvdata(file);
567
568 *index = bcap_dev->cur_input;
569 return 0;
570 }
571
572 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
573 {
574 struct bcap_device *bcap_dev = video_drvdata(file);
575 struct bfin_capture_config *config = bcap_dev->cfg;
576 struct bcap_route *route;
577 int ret;
578
579 if (vb2_is_busy(&bcap_dev->buffer_queue))
580 return -EBUSY;
581
582 if (index >= config->num_inputs)
583 return -EINVAL;
584
585 route = &config->routes[index];
586 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
587 route->input, route->output, 0);
588 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
589 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
590 return ret;
591 }
592 bcap_dev->cur_input = index;
593 /* if this route has specific config, update ppi control */
594 if (route->ppi_control)
595 config->ppi_control = route->ppi_control;
596 return 0;
597 }
598
599 static int bcap_try_format(struct bcap_device *bcap,
600 struct v4l2_pix_format *pixfmt,
601 struct bcap_format *bcap_fmt)
602 {
603 struct bcap_format *sf = bcap->sensor_formats;
604 struct bcap_format *fmt = NULL;
605 struct v4l2_subdev_pad_config pad_cfg;
606 struct v4l2_subdev_format format = {
607 .which = V4L2_SUBDEV_FORMAT_TRY,
608 };
609 int ret, i;
610
611 for (i = 0; i < bcap->num_sensor_formats; i++) {
612 fmt = &sf[i];
613 if (pixfmt->pixelformat == fmt->pixelformat)
614 break;
615 }
616 if (i == bcap->num_sensor_formats)
617 fmt = &sf[0];
618
619 v4l2_fill_mbus_format(&format.format, pixfmt, fmt->mbus_code);
620 ret = v4l2_subdev_call(bcap->sd, pad, set_fmt, &pad_cfg,
621 &format);
622 if (ret < 0)
623 return ret;
624 v4l2_fill_pix_format(pixfmt, &format.format);
625 if (bcap_fmt) {
626 for (i = 0; i < bcap->num_sensor_formats; i++) {
627 fmt = &sf[i];
628 if (format.format.code == fmt->mbus_code)
629 break;
630 }
631 *bcap_fmt = *fmt;
632 }
633 pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
634 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
635 return 0;
636 }
637
638 static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
639 struct v4l2_fmtdesc *fmt)
640 {
641 struct bcap_device *bcap_dev = video_drvdata(file);
642 struct bcap_format *sf = bcap_dev->sensor_formats;
643
644 if (fmt->index >= bcap_dev->num_sensor_formats)
645 return -EINVAL;
646
647 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
648 strlcpy(fmt->description,
649 sf[fmt->index].desc,
650 sizeof(fmt->description));
651 fmt->pixelformat = sf[fmt->index].pixelformat;
652 return 0;
653 }
654
655 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
656 struct v4l2_format *fmt)
657 {
658 struct bcap_device *bcap_dev = video_drvdata(file);
659 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
660
661 return bcap_try_format(bcap_dev, pixfmt, NULL);
662 }
663
664 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
665 struct v4l2_format *fmt)
666 {
667 struct bcap_device *bcap_dev = video_drvdata(file);
668
669 fmt->fmt.pix = bcap_dev->fmt;
670 return 0;
671 }
672
673 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
674 struct v4l2_format *fmt)
675 {
676 struct bcap_device *bcap_dev = video_drvdata(file);
677 struct v4l2_subdev_format format = {
678 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
679 };
680 struct bcap_format bcap_fmt;
681 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
682 int ret;
683
684 if (vb2_is_busy(&bcap_dev->buffer_queue))
685 return -EBUSY;
686
687 /* see if format works */
688 ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
689 if (ret < 0)
690 return ret;
691
692 v4l2_fill_mbus_format(&format.format, pixfmt, bcap_fmt.mbus_code);
693 ret = v4l2_subdev_call(bcap_dev->sd, pad, set_fmt, NULL, &format);
694 if (ret < 0)
695 return ret;
696 bcap_dev->fmt = *pixfmt;
697 bcap_dev->bpp = bcap_fmt.bpp;
698 bcap_dev->dlen = bcap_fmt.dlen;
699 return 0;
700 }
701
702 static int bcap_querycap(struct file *file, void *priv,
703 struct v4l2_capability *cap)
704 {
705 struct bcap_device *bcap_dev = video_drvdata(file);
706
707 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
708 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
709 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
710 strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
711 strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
712 return 0;
713 }
714
715 static int bcap_g_parm(struct file *file, void *fh,
716 struct v4l2_streamparm *a)
717 {
718 struct bcap_device *bcap_dev = video_drvdata(file);
719
720 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
721 return -EINVAL;
722 return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
723 }
724
725 static int bcap_s_parm(struct file *file, void *fh,
726 struct v4l2_streamparm *a)
727 {
728 struct bcap_device *bcap_dev = video_drvdata(file);
729
730 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
731 return -EINVAL;
732 return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
733 }
734
735 static int bcap_log_status(struct file *file, void *priv)
736 {
737 struct bcap_device *bcap_dev = video_drvdata(file);
738 /* status for sub devices */
739 v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
740 return 0;
741 }
742
743 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
744 .vidioc_querycap = bcap_querycap,
745 .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap,
746 .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
747 .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap,
748 .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap,
749 .vidioc_enum_input = bcap_enum_input,
750 .vidioc_g_input = bcap_g_input,
751 .vidioc_s_input = bcap_s_input,
752 .vidioc_querystd = bcap_querystd,
753 .vidioc_s_std = bcap_s_std,
754 .vidioc_g_std = bcap_g_std,
755 .vidioc_s_dv_timings = bcap_s_dv_timings,
756 .vidioc_g_dv_timings = bcap_g_dv_timings,
757 .vidioc_query_dv_timings = bcap_query_dv_timings,
758 .vidioc_enum_dv_timings = bcap_enum_dv_timings,
759 .vidioc_reqbufs = vb2_ioctl_reqbufs,
760 .vidioc_create_bufs = vb2_ioctl_create_bufs,
761 .vidioc_querybuf = vb2_ioctl_querybuf,
762 .vidioc_qbuf = vb2_ioctl_qbuf,
763 .vidioc_dqbuf = vb2_ioctl_dqbuf,
764 .vidioc_expbuf = vb2_ioctl_expbuf,
765 .vidioc_streamon = vb2_ioctl_streamon,
766 .vidioc_streamoff = vb2_ioctl_streamoff,
767 .vidioc_g_parm = bcap_g_parm,
768 .vidioc_s_parm = bcap_s_parm,
769 .vidioc_log_status = bcap_log_status,
770 };
771
772 static struct v4l2_file_operations bcap_fops = {
773 .owner = THIS_MODULE,
774 .open = v4l2_fh_open,
775 .release = vb2_fop_release,
776 .unlocked_ioctl = video_ioctl2,
777 .mmap = vb2_fop_mmap,
778 #ifndef CONFIG_MMU
779 .get_unmapped_area = vb2_fop_get_unmapped_area,
780 #endif
781 .poll = vb2_fop_poll
782 };
783
784 static int bcap_probe(struct platform_device *pdev)
785 {
786 struct bcap_device *bcap_dev;
787 struct video_device *vfd;
788 struct i2c_adapter *i2c_adap;
789 struct bfin_capture_config *config;
790 struct vb2_queue *q;
791 struct bcap_route *route;
792 int ret;
793
794 config = pdev->dev.platform_data;
795 if (!config || !config->num_inputs) {
796 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
797 return -ENODEV;
798 }
799
800 bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
801 if (!bcap_dev) {
802 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
803 return -ENOMEM;
804 }
805
806 bcap_dev->cfg = config;
807
808 bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
809 if (!bcap_dev->ppi) {
810 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
811 ret = -ENODEV;
812 goto err_free_dev;
813 }
814 bcap_dev->ppi->priv = bcap_dev;
815
816 bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
817 if (IS_ERR(bcap_dev->alloc_ctx)) {
818 ret = PTR_ERR(bcap_dev->alloc_ctx);
819 goto err_free_ppi;
820 }
821
822 vfd = &bcap_dev->video_dev;
823 /* initialize field of video device */
824 vfd->release = video_device_release_empty;
825 vfd->fops = &bcap_fops;
826 vfd->ioctl_ops = &bcap_ioctl_ops;
827 vfd->tvnorms = 0;
828 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
829 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
830
831 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
832 if (ret) {
833 v4l2_err(pdev->dev.driver,
834 "Unable to register v4l2 device\n");
835 goto err_cleanup_ctx;
836 }
837 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
838
839 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
840 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
841 if (ret) {
842 v4l2_err(&bcap_dev->v4l2_dev,
843 "Unable to init control handler\n");
844 goto err_unreg_v4l2;
845 }
846
847 spin_lock_init(&bcap_dev->lock);
848 /* initialize queue */
849 q = &bcap_dev->buffer_queue;
850 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
851 q->io_modes = VB2_MMAP | VB2_DMABUF;
852 q->drv_priv = bcap_dev;
853 q->buf_struct_size = sizeof(struct bcap_buffer);
854 q->ops = &bcap_video_qops;
855 q->mem_ops = &vb2_dma_contig_memops;
856 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
857 q->lock = &bcap_dev->mutex;
858 q->min_buffers_needed = 1;
859
860 ret = vb2_queue_init(q);
861 if (ret)
862 goto err_free_handler;
863
864 mutex_init(&bcap_dev->mutex);
865 init_completion(&bcap_dev->comp);
866
867 /* init video dma queues */
868 INIT_LIST_HEAD(&bcap_dev->dma_queue);
869
870 vfd->lock = &bcap_dev->mutex;
871 vfd->queue = q;
872
873 /* register video device */
874 ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
875 if (ret) {
876 v4l2_err(&bcap_dev->v4l2_dev,
877 "Unable to register video device\n");
878 goto err_free_handler;
879 }
880 video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
881 v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
882 video_device_node_name(vfd));
883
884 /* load up the subdevice */
885 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
886 if (!i2c_adap) {
887 v4l2_err(&bcap_dev->v4l2_dev,
888 "Unable to find i2c adapter\n");
889 ret = -ENODEV;
890 goto err_unreg_vdev;
891
892 }
893 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
894 i2c_adap,
895 &config->board_info,
896 NULL);
897 if (bcap_dev->sd) {
898 int i;
899
900 /* update tvnorms from the sub devices */
901 for (i = 0; i < config->num_inputs; i++)
902 vfd->tvnorms |= config->inputs[i].std;
903 } else {
904 v4l2_err(&bcap_dev->v4l2_dev,
905 "Unable to register sub device\n");
906 ret = -ENODEV;
907 goto err_unreg_vdev;
908 }
909
910 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
911
912 /*
913 * explicitly set input, otherwise some boards
914 * may not work at the state as we expected
915 */
916 route = &config->routes[0];
917 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
918 route->input, route->output, 0);
919 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
920 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
921 goto err_unreg_vdev;
922 }
923 bcap_dev->cur_input = 0;
924 /* if this route has specific config, update ppi control */
925 if (route->ppi_control)
926 config->ppi_control = route->ppi_control;
927
928 /* now we can probe the default state */
929 if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
930 v4l2_std_id std;
931 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
932 if (ret) {
933 v4l2_err(&bcap_dev->v4l2_dev,
934 "Unable to get std\n");
935 goto err_unreg_vdev;
936 }
937 bcap_dev->std = std;
938 }
939 if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
940 struct v4l2_dv_timings dv_timings;
941 ret = v4l2_subdev_call(bcap_dev->sd, video,
942 g_dv_timings, &dv_timings);
943 if (ret) {
944 v4l2_err(&bcap_dev->v4l2_dev,
945 "Unable to get dv timings\n");
946 goto err_unreg_vdev;
947 }
948 bcap_dev->dv_timings = dv_timings;
949 }
950 ret = bcap_init_sensor_formats(bcap_dev);
951 if (ret) {
952 v4l2_err(&bcap_dev->v4l2_dev,
953 "Unable to create sensor formats table\n");
954 goto err_unreg_vdev;
955 }
956 return 0;
957 err_unreg_vdev:
958 video_unregister_device(&bcap_dev->video_dev);
959 err_free_handler:
960 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
961 err_unreg_v4l2:
962 v4l2_device_unregister(&bcap_dev->v4l2_dev);
963 err_cleanup_ctx:
964 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
965 err_free_ppi:
966 ppi_delete_instance(bcap_dev->ppi);
967 err_free_dev:
968 kfree(bcap_dev);
969 return ret;
970 }
971
972 static int bcap_remove(struct platform_device *pdev)
973 {
974 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
975 struct bcap_device *bcap_dev = container_of(v4l2_dev,
976 struct bcap_device, v4l2_dev);
977
978 bcap_free_sensor_formats(bcap_dev);
979 video_unregister_device(&bcap_dev->video_dev);
980 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
981 v4l2_device_unregister(v4l2_dev);
982 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
983 ppi_delete_instance(bcap_dev->ppi);
984 kfree(bcap_dev);
985 return 0;
986 }
987
988 static struct platform_driver bcap_driver = {
989 .driver = {
990 .name = CAPTURE_DRV_NAME,
991 },
992 .probe = bcap_probe,
993 .remove = bcap_remove,
994 };
995 module_platform_driver(bcap_driver);
996
997 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
998 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
999 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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