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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / platform / blackfin / bfin_capture.c
blobd0092dae7a57e6ab391ccf1021eebd4591e28787
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_v4l2_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_v4l2_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 unsigned int *nbuffers, unsigned int *nplanes,
206 unsigned int sizes[], void *alloc_ctxs[])
207 {
208 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
209
210 if (vq->num_buffers + *nbuffers < 2)
211 *nbuffers = 2;
212 alloc_ctxs[0] = bcap_dev->alloc_ctx;
213
214 if (*nplanes)
215 return sizes[0] < bcap_dev->fmt.sizeimage ? -EINVAL : 0;
216
217 *nplanes = 1;
218 sizes[0] = bcap_dev->fmt.sizeimage;
219
220 return 0;
221 }
222
223 static int bcap_buffer_prepare(struct vb2_buffer *vb)
224 {
225 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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 vbuf->field = bcap_dev->fmt.field;
237
238 return 0;
239 }
240
241 static void bcap_buffer_queue(struct vb2_buffer *vb)
242 {
243 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
244 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
245 struct bcap_buffer *buf = to_bcap_vb(vbuf);
246 unsigned long flags;
247
248 spin_lock_irqsave(&bcap_dev->lock, flags);
249 list_add_tail(&buf->list, &bcap_dev->dma_queue);
250 spin_unlock_irqrestore(&bcap_dev->lock, flags);
251 }
252
253 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
254 {
255 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
256 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
257 struct bcap_buffer *buf = to_bcap_vb(vbuf);
258 unsigned long flags;
259
260 spin_lock_irqsave(&bcap_dev->lock, flags);
261 list_del_init(&buf->list);
262 spin_unlock_irqrestore(&bcap_dev->lock, flags);
263 }
264
265 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
266 {
267 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
268 struct ppi_if *ppi = bcap_dev->ppi;
269 struct bcap_buffer *buf, *tmp;
270 struct ppi_params params;
271 dma_addr_t addr;
272 int ret;
273
274 /* enable streamon on the sub device */
275 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
276 if (ret && (ret != -ENOIOCTLCMD)) {
277 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
278 goto err;
279 }
280
281 /* set ppi params */
282 params.width = bcap_dev->fmt.width;
283 params.height = bcap_dev->fmt.height;
284 params.bpp = bcap_dev->bpp;
285 params.dlen = bcap_dev->dlen;
286 params.ppi_control = bcap_dev->cfg->ppi_control;
287 params.int_mask = bcap_dev->cfg->int_mask;
288 if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
289 & V4L2_IN_CAP_DV_TIMINGS) {
290 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
291
292 params.hdelay = bt->hsync + bt->hbackporch;
293 params.vdelay = bt->vsync + bt->vbackporch;
294 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
295 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
296 } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
297 & V4L2_IN_CAP_STD) {
298 params.hdelay = 0;
299 params.vdelay = 0;
300 if (bcap_dev->std & V4L2_STD_525_60) {
301 params.line = 858;
302 params.frame = 525;
303 } else {
304 params.line = 864;
305 params.frame = 625;
306 }
307 } else {
308 params.hdelay = 0;
309 params.vdelay = 0;
310 params.line = params.width + bcap_dev->cfg->blank_pixels;
311 params.frame = params.height;
312 }
313 ret = ppi->ops->set_params(ppi, &params);
314 if (ret < 0) {
315 v4l2_err(&bcap_dev->v4l2_dev,
316 "Error in setting ppi params\n");
317 goto err;
318 }
319
320 /* attach ppi DMA irq handler */
321 ret = ppi->ops->attach_irq(ppi, bcap_isr);
322 if (ret < 0) {
323 v4l2_err(&bcap_dev->v4l2_dev,
324 "Error in attaching interrupt handler\n");
325 goto err;
326 }
327
328 bcap_dev->sequence = 0;
329
330 reinit_completion(&bcap_dev->comp);
331 bcap_dev->stop = false;
332
333 /* get the next frame from the dma queue */
334 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
335 struct bcap_buffer, list);
336 /* remove buffer from the dma queue */
337 list_del_init(&bcap_dev->cur_frm->list);
338 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb.vb2_buf,
339 0);
340 /* update DMA address */
341 ppi->ops->update_addr(ppi, (unsigned long)addr);
342 /* enable ppi */
343 ppi->ops->start(ppi);
344
345 return 0;
346
347 err:
348 list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
349 list_del(&buf->list);
350 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
351 }
352
353 return ret;
354 }
355
356 static void bcap_stop_streaming(struct vb2_queue *vq)
357 {
358 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
359 struct ppi_if *ppi = bcap_dev->ppi;
360 int ret;
361
362 bcap_dev->stop = true;
363 wait_for_completion(&bcap_dev->comp);
364 ppi->ops->stop(ppi);
365 ppi->ops->detach_irq(ppi);
366 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
367 if (ret && (ret != -ENOIOCTLCMD))
368 v4l2_err(&bcap_dev->v4l2_dev,
369 "stream off failed in subdev\n");
370
371 /* release all active buffers */
372 if (bcap_dev->cur_frm)
373 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
374 VB2_BUF_STATE_ERROR);
375
376 while (!list_empty(&bcap_dev->dma_queue)) {
377 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
378 struct bcap_buffer, list);
379 list_del_init(&bcap_dev->cur_frm->list);
380 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
381 VB2_BUF_STATE_ERROR);
382 }
383 }
384
385 static struct vb2_ops bcap_video_qops = {
386 .queue_setup = bcap_queue_setup,
387 .buf_prepare = bcap_buffer_prepare,
388 .buf_cleanup = bcap_buffer_cleanup,
389 .buf_queue = bcap_buffer_queue,
390 .wait_prepare = vb2_ops_wait_prepare,
391 .wait_finish = vb2_ops_wait_finish,
392 .start_streaming = bcap_start_streaming,
393 .stop_streaming = bcap_stop_streaming,
394 };
395
396 static irqreturn_t bcap_isr(int irq, void *dev_id)
397 {
398 struct ppi_if *ppi = dev_id;
399 struct bcap_device *bcap_dev = ppi->priv;
400 struct vb2_v4l2_buffer *vbuf = &bcap_dev->cur_frm->vb;
401 struct vb2_buffer *vb = &vbuf->vb2_buf;
402 dma_addr_t addr;
403
404 spin_lock(&bcap_dev->lock);
405
406 if (!list_empty(&bcap_dev->dma_queue)) {
407 vb->timestamp = ktime_get_ns();
408 if (ppi->err) {
409 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
410 ppi->err = false;
411 } else {
412 vbuf->sequence = bcap_dev->sequence++;
413 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
414 }
415 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
416 struct bcap_buffer, list);
417 list_del_init(&bcap_dev->cur_frm->list);
418 } else {
419 /* clear error flag, we will get a new frame */
420 if (ppi->err)
421 ppi->err = false;
422 }
423
424 ppi->ops->stop(ppi);
425
426 if (bcap_dev->stop) {
427 complete(&bcap_dev->comp);
428 } else {
429 addr = vb2_dma_contig_plane_dma_addr(
430 &bcap_dev->cur_frm->vb.vb2_buf, 0);
431 ppi->ops->update_addr(ppi, (unsigned long)addr);
432 ppi->ops->start(ppi);
433 }
434
435 spin_unlock(&bcap_dev->lock);
436
437 return IRQ_HANDLED;
438 }
439
440 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
441 {
442 struct bcap_device *bcap_dev = video_drvdata(file);
443 struct v4l2_input input;
444
445 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
446 if (!(input.capabilities & V4L2_IN_CAP_STD))
447 return -ENODATA;
448
449 return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
450 }
451
452 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
453 {
454 struct bcap_device *bcap_dev = video_drvdata(file);
455 struct v4l2_input input;
456
457 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
458 if (!(input.capabilities & V4L2_IN_CAP_STD))
459 return -ENODATA;
460
461 *std = bcap_dev->std;
462 return 0;
463 }
464
465 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
466 {
467 struct bcap_device *bcap_dev = video_drvdata(file);
468 struct v4l2_input input;
469 int ret;
470
471 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
472 if (!(input.capabilities & V4L2_IN_CAP_STD))
473 return -ENODATA;
474
475 if (vb2_is_busy(&bcap_dev->buffer_queue))
476 return -EBUSY;
477
478 ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
479 if (ret < 0)
480 return ret;
481
482 bcap_dev->std = std;
483 return 0;
484 }
485
486 static int bcap_enum_dv_timings(struct file *file, void *priv,
487 struct v4l2_enum_dv_timings *timings)
488 {
489 struct bcap_device *bcap_dev = video_drvdata(file);
490 struct v4l2_input input;
491
492 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
493 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
494 return -ENODATA;
495
496 timings->pad = 0;
497
498 return v4l2_subdev_call(bcap_dev->sd, pad,
499 enum_dv_timings, timings);
500 }
501
502 static int bcap_query_dv_timings(struct file *file, void *priv,
503 struct v4l2_dv_timings *timings)
504 {
505 struct bcap_device *bcap_dev = video_drvdata(file);
506 struct v4l2_input input;
507
508 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
509 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
510 return -ENODATA;
511
512 return v4l2_subdev_call(bcap_dev->sd, video,
513 query_dv_timings, timings);
514 }
515
516 static int bcap_g_dv_timings(struct file *file, void *priv,
517 struct v4l2_dv_timings *timings)
518 {
519 struct bcap_device *bcap_dev = video_drvdata(file);
520 struct v4l2_input input;
521
522 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
523 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
524 return -ENODATA;
525
526 *timings = bcap_dev->dv_timings;
527 return 0;
528 }
529
530 static int bcap_s_dv_timings(struct file *file, void *priv,
531 struct v4l2_dv_timings *timings)
532 {
533 struct bcap_device *bcap_dev = video_drvdata(file);
534 struct v4l2_input input;
535 int ret;
536
537 input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
538 if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
539 return -ENODATA;
540
541 if (vb2_is_busy(&bcap_dev->buffer_queue))
542 return -EBUSY;
543
544 ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
545 if (ret < 0)
546 return ret;
547
548 bcap_dev->dv_timings = *timings;
549 return 0;
550 }
551
552 static int bcap_enum_input(struct file *file, void *priv,
553 struct v4l2_input *input)
554 {
555 struct bcap_device *bcap_dev = video_drvdata(file);
556 struct bfin_capture_config *config = bcap_dev->cfg;
557 int ret;
558 u32 status;
559
560 if (input->index >= config->num_inputs)
561 return -EINVAL;
562
563 *input = config->inputs[input->index];
564 /* get input status */
565 ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
566 if (!ret)
567 input->status = status;
568 return 0;
569 }
570
571 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
572 {
573 struct bcap_device *bcap_dev = video_drvdata(file);
574
575 *index = bcap_dev->cur_input;
576 return 0;
577 }
578
579 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
580 {
581 struct bcap_device *bcap_dev = video_drvdata(file);
582 struct bfin_capture_config *config = bcap_dev->cfg;
583 struct bcap_route *route;
584 int ret;
585
586 if (vb2_is_busy(&bcap_dev->buffer_queue))
587 return -EBUSY;
588
589 if (index >= config->num_inputs)
590 return -EINVAL;
591
592 route = &config->routes[index];
593 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
594 route->input, route->output, 0);
595 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
596 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
597 return ret;
598 }
599 bcap_dev->cur_input = index;
600 /* if this route has specific config, update ppi control */
601 if (route->ppi_control)
602 config->ppi_control = route->ppi_control;
603 return 0;
604 }
605
606 static int bcap_try_format(struct bcap_device *bcap,
607 struct v4l2_pix_format *pixfmt,
608 struct bcap_format *bcap_fmt)
609 {
610 struct bcap_format *sf = bcap->sensor_formats;
611 struct bcap_format *fmt = NULL;
612 struct v4l2_subdev_pad_config pad_cfg;
613 struct v4l2_subdev_format format = {
614 .which = V4L2_SUBDEV_FORMAT_TRY,
615 };
616 int ret, i;
617
618 for (i = 0; i < bcap->num_sensor_formats; i++) {
619 fmt = &sf[i];
620 if (pixfmt->pixelformat == fmt->pixelformat)
621 break;
622 }
623 if (i == bcap->num_sensor_formats)
624 fmt = &sf[0];
625
626 v4l2_fill_mbus_format(&format.format, pixfmt, fmt->mbus_code);
627 ret = v4l2_subdev_call(bcap->sd, pad, set_fmt, &pad_cfg,
628 &format);
629 if (ret < 0)
630 return ret;
631 v4l2_fill_pix_format(pixfmt, &format.format);
632 if (bcap_fmt) {
633 for (i = 0; i < bcap->num_sensor_formats; i++) {
634 fmt = &sf[i];
635 if (format.format.code == fmt->mbus_code)
636 break;
637 }
638 *bcap_fmt = *fmt;
639 }
640 pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
641 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
642 return 0;
643 }
644
645 static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
646 struct v4l2_fmtdesc *fmt)
647 {
648 struct bcap_device *bcap_dev = video_drvdata(file);
649 struct bcap_format *sf = bcap_dev->sensor_formats;
650
651 if (fmt->index >= bcap_dev->num_sensor_formats)
652 return -EINVAL;
653
654 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
655 strlcpy(fmt->description,
656 sf[fmt->index].desc,
657 sizeof(fmt->description));
658 fmt->pixelformat = sf[fmt->index].pixelformat;
659 return 0;
660 }
661
662 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
663 struct v4l2_format *fmt)
664 {
665 struct bcap_device *bcap_dev = video_drvdata(file);
666 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
667
668 return bcap_try_format(bcap_dev, pixfmt, NULL);
669 }
670
671 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
672 struct v4l2_format *fmt)
673 {
674 struct bcap_device *bcap_dev = video_drvdata(file);
675
676 fmt->fmt.pix = bcap_dev->fmt;
677 return 0;
678 }
679
680 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
681 struct v4l2_format *fmt)
682 {
683 struct bcap_device *bcap_dev = video_drvdata(file);
684 struct v4l2_subdev_format format = {
685 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
686 };
687 struct bcap_format bcap_fmt;
688 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
689 int ret;
690
691 if (vb2_is_busy(&bcap_dev->buffer_queue))
692 return -EBUSY;
693
694 /* see if format works */
695 ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
696 if (ret < 0)
697 return ret;
698
699 v4l2_fill_mbus_format(&format.format, pixfmt, bcap_fmt.mbus_code);
700 ret = v4l2_subdev_call(bcap_dev->sd, pad, set_fmt, NULL, &format);
701 if (ret < 0)
702 return ret;
703 bcap_dev->fmt = *pixfmt;
704 bcap_dev->bpp = bcap_fmt.bpp;
705 bcap_dev->dlen = bcap_fmt.dlen;
706 return 0;
707 }
708
709 static int bcap_querycap(struct file *file, void *priv,
710 struct v4l2_capability *cap)
711 {
712 struct bcap_device *bcap_dev = video_drvdata(file);
713
714 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
715 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
716 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
717 strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
718 strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
719 return 0;
720 }
721
722 static int bcap_g_parm(struct file *file, void *fh,
723 struct v4l2_streamparm *a)
724 {
725 struct bcap_device *bcap_dev = video_drvdata(file);
726
727 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
728 return -EINVAL;
729 return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
730 }
731
732 static int bcap_s_parm(struct file *file, void *fh,
733 struct v4l2_streamparm *a)
734 {
735 struct bcap_device *bcap_dev = video_drvdata(file);
736
737 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
738 return -EINVAL;
739 return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
740 }
741
742 static int bcap_log_status(struct file *file, void *priv)
743 {
744 struct bcap_device *bcap_dev = video_drvdata(file);
745 /* status for sub devices */
746 v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
747 return 0;
748 }
749
750 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
751 .vidioc_querycap = bcap_querycap,
752 .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap,
753 .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
754 .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap,
755 .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap,
756 .vidioc_enum_input = bcap_enum_input,
757 .vidioc_g_input = bcap_g_input,
758 .vidioc_s_input = bcap_s_input,
759 .vidioc_querystd = bcap_querystd,
760 .vidioc_s_std = bcap_s_std,
761 .vidioc_g_std = bcap_g_std,
762 .vidioc_s_dv_timings = bcap_s_dv_timings,
763 .vidioc_g_dv_timings = bcap_g_dv_timings,
764 .vidioc_query_dv_timings = bcap_query_dv_timings,
765 .vidioc_enum_dv_timings = bcap_enum_dv_timings,
766 .vidioc_reqbufs = vb2_ioctl_reqbufs,
767 .vidioc_create_bufs = vb2_ioctl_create_bufs,
768 .vidioc_querybuf = vb2_ioctl_querybuf,
769 .vidioc_qbuf = vb2_ioctl_qbuf,
770 .vidioc_dqbuf = vb2_ioctl_dqbuf,
771 .vidioc_expbuf = vb2_ioctl_expbuf,
772 .vidioc_streamon = vb2_ioctl_streamon,
773 .vidioc_streamoff = vb2_ioctl_streamoff,
774 .vidioc_g_parm = bcap_g_parm,
775 .vidioc_s_parm = bcap_s_parm,
776 .vidioc_log_status = bcap_log_status,
777 };
778
779 static struct v4l2_file_operations bcap_fops = {
780 .owner = THIS_MODULE,
781 .open = v4l2_fh_open,
782 .release = vb2_fop_release,
783 .unlocked_ioctl = video_ioctl2,
784 .mmap = vb2_fop_mmap,
785 #ifndef CONFIG_MMU
786 .get_unmapped_area = vb2_fop_get_unmapped_area,
787 #endif
788 .poll = vb2_fop_poll
789 };
790
791 static int bcap_probe(struct platform_device *pdev)
792 {
793 struct bcap_device *bcap_dev;
794 struct video_device *vfd;
795 struct i2c_adapter *i2c_adap;
796 struct bfin_capture_config *config;
797 struct vb2_queue *q;
798 struct bcap_route *route;
799 int ret;
800
801 config = pdev->dev.platform_data;
802 if (!config || !config->num_inputs) {
803 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
804 return -ENODEV;
805 }
806
807 bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
808 if (!bcap_dev) {
809 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
810 return -ENOMEM;
811 }
812
813 bcap_dev->cfg = config;
814
815 bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
816 if (!bcap_dev->ppi) {
817 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
818 ret = -ENODEV;
819 goto err_free_dev;
820 }
821 bcap_dev->ppi->priv = bcap_dev;
822
823 bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
824 if (IS_ERR(bcap_dev->alloc_ctx)) {
825 ret = PTR_ERR(bcap_dev->alloc_ctx);
826 goto err_free_ppi;
827 }
828
829 vfd = &bcap_dev->video_dev;
830 /* initialize field of video device */
831 vfd->release = video_device_release_empty;
832 vfd->fops = &bcap_fops;
833 vfd->ioctl_ops = &bcap_ioctl_ops;
834 vfd->tvnorms = 0;
835 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
836 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
837
838 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
839 if (ret) {
840 v4l2_err(pdev->dev.driver,
841 "Unable to register v4l2 device\n");
842 goto err_cleanup_ctx;
843 }
844 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
845
846 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
847 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
848 if (ret) {
849 v4l2_err(&bcap_dev->v4l2_dev,
850 "Unable to init control handler\n");
851 goto err_unreg_v4l2;
852 }
853
854 spin_lock_init(&bcap_dev->lock);
855 /* initialize queue */
856 q = &bcap_dev->buffer_queue;
857 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
858 q->io_modes = VB2_MMAP | VB2_DMABUF;
859 q->drv_priv = bcap_dev;
860 q->buf_struct_size = sizeof(struct bcap_buffer);
861 q->ops = &bcap_video_qops;
862 q->mem_ops = &vb2_dma_contig_memops;
863 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
864 q->lock = &bcap_dev->mutex;
865 q->min_buffers_needed = 1;
866
867 ret = vb2_queue_init(q);
868 if (ret)
869 goto err_free_handler;
870
871 mutex_init(&bcap_dev->mutex);
872 init_completion(&bcap_dev->comp);
873
874 /* init video dma queues */
875 INIT_LIST_HEAD(&bcap_dev->dma_queue);
876
877 vfd->lock = &bcap_dev->mutex;
878 vfd->queue = q;
879
880 /* register video device */
881 ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
882 if (ret) {
883 v4l2_err(&bcap_dev->v4l2_dev,
884 "Unable to register video device\n");
885 goto err_free_handler;
886 }
887 video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
888 v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
889 video_device_node_name(vfd));
890
891 /* load up the subdevice */
892 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
893 if (!i2c_adap) {
894 v4l2_err(&bcap_dev->v4l2_dev,
895 "Unable to find i2c adapter\n");
896 ret = -ENODEV;
897 goto err_unreg_vdev;
898
899 }
900 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
901 i2c_adap,
902 &config->board_info,
903 NULL);
904 if (bcap_dev->sd) {
905 int i;
906
907 /* update tvnorms from the sub devices */
908 for (i = 0; i < config->num_inputs; i++)
909 vfd->tvnorms |= config->inputs[i].std;
910 } else {
911 v4l2_err(&bcap_dev->v4l2_dev,
912 "Unable to register sub device\n");
913 ret = -ENODEV;
914 goto err_unreg_vdev;
915 }
916
917 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
918
919 /*
920 * explicitly set input, otherwise some boards
921 * may not work at the state as we expected
922 */
923 route = &config->routes[0];
924 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
925 route->input, route->output, 0);
926 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
927 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
928 goto err_unreg_vdev;
929 }
930 bcap_dev->cur_input = 0;
931 /* if this route has specific config, update ppi control */
932 if (route->ppi_control)
933 config->ppi_control = route->ppi_control;
934
935 /* now we can probe the default state */
936 if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
937 v4l2_std_id std;
938 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
939 if (ret) {
940 v4l2_err(&bcap_dev->v4l2_dev,
941 "Unable to get std\n");
942 goto err_unreg_vdev;
943 }
944 bcap_dev->std = std;
945 }
946 if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
947 struct v4l2_dv_timings dv_timings;
948 ret = v4l2_subdev_call(bcap_dev->sd, video,
949 g_dv_timings, &dv_timings);
950 if (ret) {
951 v4l2_err(&bcap_dev->v4l2_dev,
952 "Unable to get dv timings\n");
953 goto err_unreg_vdev;
954 }
955 bcap_dev->dv_timings = dv_timings;
956 }
957 ret = bcap_init_sensor_formats(bcap_dev);
958 if (ret) {
959 v4l2_err(&bcap_dev->v4l2_dev,
960 "Unable to create sensor formats table\n");
961 goto err_unreg_vdev;
962 }
963 return 0;
964 err_unreg_vdev:
965 video_unregister_device(&bcap_dev->video_dev);
966 err_free_handler:
967 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
968 err_unreg_v4l2:
969 v4l2_device_unregister(&bcap_dev->v4l2_dev);
970 err_cleanup_ctx:
971 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
972 err_free_ppi:
973 ppi_delete_instance(bcap_dev->ppi);
974 err_free_dev:
975 kfree(bcap_dev);
976 return ret;
977 }
978
979 static int bcap_remove(struct platform_device *pdev)
980 {
981 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
982 struct bcap_device *bcap_dev = container_of(v4l2_dev,
983 struct bcap_device, v4l2_dev);
984
985 bcap_free_sensor_formats(bcap_dev);
986 video_unregister_device(&bcap_dev->video_dev);
987 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
988 v4l2_device_unregister(v4l2_dev);
989 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
990 ppi_delete_instance(bcap_dev->ppi);
991 kfree(bcap_dev);
992 return 0;
993 }
994
995 static struct platform_driver bcap_driver = {
996 .driver = {
997 .name = CAPTURE_DRV_NAME,
998 },
999 .probe = bcap_probe,
1000 .remove = bcap_remove,
1001 };
1002 module_platform_driver(bcap_driver);
1003
1004 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1005 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1006 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support