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
16 #include <linux/completion.h>
17 #include <linux/delay.h>
18 #include <linux/errno.h>
19 #include <linux/fs.h>
20 #include <linux/i2c.h>
21 #include <linux/init.h>
22 #include <linux/interrupt.h>
23 #include <linux/io.h>
24 #include <linux/mm.h>
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/slab.h>
28 #include <linux/time.h>
29 #include <linux/types.h>
30
31 #include <media/v4l2-common.h>
32 #include <media/v4l2-ctrls.h>
33 #include <media/v4l2-device.h>
34 #include <media/v4l2-ioctl.h>
35 #include <media/videobuf2-dma-contig.h>
36
37 #include <asm/dma.h>
38
39 #include <media/blackfin/bfin_capture.h>
40 #include <media/blackfin/ppi.h>
41
42 #define CAPTURE_DRV_NAME "bfin_capture"
43
44 struct bcap_format {
45 char *desc;
46 u32 pixelformat;
47 u32 mbus_code;
48 int bpp; /* bits per pixel */
49 int dlen; /* data length for ppi in bits */
50 };
51
52 struct bcap_buffer {
53 struct vb2_v4l2_buffer vb;
54 struct list_head list;
55 };
56
57 struct bcap_device {
58 /* capture device instance */
59 struct v4l2_device v4l2_dev;
60 /* v4l2 control handler */
61 struct v4l2_ctrl_handler ctrl_handler;
62 /* device node data */
63 struct video_device video_dev;
64 /* sub device instance */
65 struct v4l2_subdev *sd;
66 /* capture config */
67 struct bfin_capture_config *cfg;
68 /* ppi interface */
69 struct ppi_if *ppi;
70 /* current input */
71 unsigned int cur_input;
72 /* current selected standard */
73 v4l2_std_id std;
74 /* current selected dv_timings */
75 struct v4l2_dv_timings dv_timings;
76 /* used to store pixel format */
77 struct v4l2_pix_format fmt;
78 /* bits per pixel*/
79 int bpp;
80 /* data length for ppi in bits */
81 int dlen;
82 /* used to store sensor supported format */
83 struct bcap_format *sensor_formats;
84 /* number of sensor formats array */
85 int num_sensor_formats;
86 /* pointing to current video buffer */
87 struct bcap_buffer *cur_frm;
88 /* buffer queue used in videobuf2 */
89 struct vb2_queue buffer_queue;
90 /* queue of filled frames */
91 struct list_head dma_queue;
92 /* used in videobuf2 callback */
93 spinlock_t lock;
94 /* used to access capture device */
95 struct mutex mutex;
96 /* used to wait ppi to complete one transfer */
97 struct completion comp;
98 /* prepare to stop */
99 bool stop;
100 /* vb2 buffer sequence counter */
101 unsigned sequence;
102 };
103
104 static const struct bcap_format bcap_formats[] = {
105 {
106 .desc = "YCbCr 4:2:2 Interleaved UYVY",
107 .pixelformat = V4L2_PIX_FMT_UYVY,
108 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
109 .bpp = 16,
110 .dlen = 8,
111 },
112 {
113 .desc = "YCbCr 4:2:2 Interleaved YUYV",
114 .pixelformat = V4L2_PIX_FMT_YUYV,
115 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
116 .bpp = 16,
117 .dlen = 8,
118 },
119 {
120 .desc = "YCbCr 4:2:2 Interleaved UYVY",
121 .pixelformat = V4L2_PIX_FMT_UYVY,
122 .mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
123 .bpp = 16,
124 .dlen = 16,
125 },
126 {
127 .desc = "RGB 565",
128 .pixelformat = V4L2_PIX_FMT_RGB565,
129 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
130 .bpp = 16,
131 .dlen = 8,
132 },
133 {
134 .desc = "RGB 444",
135 .pixelformat = V4L2_PIX_FMT_RGB444,
136 .mbus_code = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
137 .bpp = 16,
138 .dlen = 8,
139 },
140
141 };
142 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
143
144 static irqreturn_t bcap_isr(int irq, void *dev_id);
145
to_bcap_vb(struct vb2_v4l2_buffer * vb)146 static struct bcap_buffer *to_bcap_vb(struct vb2_v4l2_buffer *vb)
147 {
148 return container_of(vb, struct bcap_buffer, vb);
149 }
150
bcap_init_sensor_formats(struct bcap_device * bcap_dev)151 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
152 {
153 struct v4l2_subdev_mbus_code_enum code = {
154 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
155 };
156 struct bcap_format *sf;
157 unsigned int num_formats = 0;
158 int i, j;
159
160 while (!v4l2_subdev_call(bcap_dev->sd, pad,
161 enum_mbus_code, NULL, &code)) {
162 num_formats++;
163 code.index++;
164 }
165 if (!num_formats)
166 return -ENXIO;
167
168 sf = kcalloc(num_formats, sizeof(*sf), GFP_KERNEL);
169 if (!sf)
170 return -ENOMEM;
171
172 for (i = 0; i < num_formats; i++) {
173 code.index = i;
174 v4l2_subdev_call(bcap_dev->sd, pad,
175 enum_mbus_code, NULL, &code);
176 for (j = 0; j < BCAP_MAX_FMTS; j++)
177 if (code.code == bcap_formats[j].mbus_code)
178 break;
179 if (j == BCAP_MAX_FMTS) {
180 /* we don't allow this sensor working with our bridge */
181 kfree(sf);
182 return -EINVAL;
183 }
184 sf[i] = bcap_formats[j];
185 }
186 bcap_dev->sensor_formats = sf;
187 bcap_dev->num_sensor_formats = num_formats;
188 return 0;
189 }
190
bcap_free_sensor_formats(struct bcap_device * bcap_dev)191 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
192 {
193 bcap_dev->num_sensor_formats = 0;
194 kfree(bcap_dev->sensor_formats);
195 bcap_dev->sensor_formats = NULL;
196 }
197
bcap_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])198 static int bcap_queue_setup(struct vb2_queue *vq,
199 unsigned int *nbuffers, unsigned int *nplanes,
200 unsigned int sizes[], struct device *alloc_devs[])
201 {
202 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
203
204 if (vq->num_buffers + *nbuffers < 2)
205 *nbuffers = 2;
206
207 if (*nplanes)
208 return sizes[0] < bcap_dev->fmt.sizeimage ? -EINVAL : 0;
209
210 *nplanes = 1;
211 sizes[0] = bcap_dev->fmt.sizeimage;
212
213 return 0;
214 }
215
bcap_buffer_prepare(struct vb2_buffer * vb)216 static int bcap_buffer_prepare(struct vb2_buffer *vb)
217 {
218 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
219 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
220 unsigned long size = bcap_dev->fmt.sizeimage;
221
222 if (vb2_plane_size(vb, 0) < size) {
223 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
224 vb2_plane_size(vb, 0), size);
225 return -EINVAL;
226 }
227 vb2_set_plane_payload(vb, 0, size);
228
229 vbuf->field = bcap_dev->fmt.field;
230
231 return 0;
232 }
233
bcap_buffer_queue(struct vb2_buffer * vb)234 static void bcap_buffer_queue(struct vb2_buffer *vb)
235 {
236 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
237 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
238 struct bcap_buffer *buf = to_bcap_vb(vbuf);
239 unsigned long flags;
240
241 spin_lock_irqsave(&bcap_dev->lock, flags);
242 list_add_tail(&buf->list, &bcap_dev->dma_queue);
243 spin_unlock_irqrestore(&bcap_dev->lock, flags);
244 }
245
bcap_buffer_cleanup(struct vb2_buffer * vb)246 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
247 {
248 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
249 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
250 struct bcap_buffer *buf = to_bcap_vb(vbuf);
251 unsigned long flags;
252
253 spin_lock_irqsave(&bcap_dev->lock, flags);
254 list_del_init(&buf->list);
255 spin_unlock_irqrestore(&bcap_dev->lock, flags);
256 }
257
bcap_start_streaming(struct vb2_queue * vq,unsigned int count)258 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
259 {
260 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
261 struct ppi_if *ppi = bcap_dev->ppi;
262 struct bcap_buffer *buf, *tmp;
263 struct ppi_params params;
264 dma_addr_t addr;
265 int ret;
266
267 /* enable streamon on the sub device */
268 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
269 if (ret && (ret != -ENOIOCTLCMD)) {
270 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
271 goto err;
272 }
273
274 /* set ppi params */
275 params.width = bcap_dev->fmt.width;
276 params.height = bcap_dev->fmt.height;
277 params.bpp = bcap_dev->bpp;
278 params.dlen = bcap_dev->dlen;
279 params.ppi_control = bcap_dev->cfg->ppi_control;
280 params.int_mask = bcap_dev->cfg->int_mask;
281 if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
282 & V4L2_IN_CAP_DV_TIMINGS) {
283 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
284
285 params.hdelay = bt->hsync + bt->hbackporch;
286 params.vdelay = bt->vsync + bt->vbackporch;
287 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
288 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
289 } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
290 & V4L2_IN_CAP_STD) {
291 params.hdelay = 0;
292 params.vdelay = 0;
293 if (bcap_dev->std & V4L2_STD_525_60) {
294 params.line = 858;
295 params.frame = 525;
296 } else {
297 params.line = 864;
298 params.frame = 625;
299 }
300 } else {
301 params.hdelay = 0;
302 params.vdelay = 0;
303 params.line = params.width + bcap_dev->cfg->blank_pixels;
304 params.frame = params.height;
305 }
306 ret = ppi->ops->set_params(ppi, ¶ms);
307 if (ret < 0) {
308 v4l2_err(&bcap_dev->v4l2_dev,
309 "Error in setting ppi params\n");
310 goto err;
311 }
312
313 /* attach ppi DMA irq handler */
314 ret = ppi->ops->attach_irq(ppi, bcap_isr);
315 if (ret < 0) {
316 v4l2_err(&bcap_dev->v4l2_dev,
317 "Error in attaching interrupt handler\n");
318 goto err;
319 }
320
321 bcap_dev->sequence = 0;
322
323 reinit_completion(&bcap_dev->comp);
324 bcap_dev->stop = false;
325
326 /* get the next frame from the dma queue */
327 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
328 struct bcap_buffer, list);
329 /* remove buffer from the dma queue */
330 list_del_init(&bcap_dev->cur_frm->list);
331 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb.vb2_buf,
332 0);
333 /* update DMA address */
334 ppi->ops->update_addr(ppi, (unsigned long)addr);
335 /* enable ppi */
336 ppi->ops->start(ppi);
337
338 return 0;
339
340 err:
341 list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
342 list_del(&buf->list);
343 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
344 }
345
346 return ret;
347 }
348
bcap_stop_streaming(struct vb2_queue * vq)349 static void bcap_stop_streaming(struct vb2_queue *vq)
350 {
351 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
352 struct ppi_if *ppi = bcap_dev->ppi;
353 int ret;
354
355 bcap_dev->stop = true;
356 wait_for_completion(&bcap_dev->comp);
357 ppi->ops->stop(ppi);
358 ppi->ops->detach_irq(ppi);
359 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
360 if (ret && (ret != -ENOIOCTLCMD))
361 v4l2_err(&bcap_dev->v4l2_dev,
362 "stream off failed in subdev\n");
363
364 /* release all active buffers */
365 if (bcap_dev->cur_frm)
366 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
367 VB2_BUF_STATE_ERROR);
368
369 while (!list_empty(&bcap_dev->dma_queue)) {
370 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
371 struct bcap_buffer, list);
372 list_del_init(&bcap_dev->cur_frm->list);
373 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
374 VB2_BUF_STATE_ERROR);
375 }
376 }
377
378 static const struct vb2_ops bcap_video_qops = {
379 .queue_setup = bcap_queue_setup,
380 .buf_prepare = bcap_buffer_prepare,
381 .buf_cleanup = bcap_buffer_cleanup,
382 .buf_queue = bcap_buffer_queue,
383 .wait_prepare = vb2_ops_wait_prepare,
384 .wait_finish = vb2_ops_wait_finish,
385 .start_streaming = bcap_start_streaming,
386 .stop_streaming = bcap_stop_streaming,
387 };
388
bcap_isr(int irq,void * dev_id)389 static irqreturn_t bcap_isr(int irq, void *dev_id)
390 {
391 struct ppi_if *ppi = dev_id;
392 struct bcap_device *bcap_dev = ppi->priv;
393 struct vb2_v4l2_buffer *vbuf = &bcap_dev->cur_frm->vb;
394 struct vb2_buffer *vb = &vbuf->vb2_buf;
395 dma_addr_t addr;
396
397 spin_lock(&bcap_dev->lock);
398
399 if (!list_empty(&bcap_dev->dma_queue)) {
400 vb->timestamp = ktime_get_ns();
401 if (ppi->err) {
402 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
403 ppi->err = false;
404 } else {
405 vbuf->sequence = bcap_dev->sequence++;
406 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
407 }
408 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
409 struct bcap_buffer, list);
410 list_del_init(&bcap_dev->cur_frm->list);
411 } else {
412 /* clear error flag, we will get a new frame */
413 if (ppi->err)
414 ppi->err = false;
415 }
416
417 ppi->ops->stop(ppi);
418
419 if (bcap_dev->stop) {
420 complete(&bcap_dev->comp);
421 } else {
422 addr = vb2_dma_contig_plane_dma_addr(
423 &bcap_dev->cur_frm->vb.vb2_buf, 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
bcap_querystd(struct file * file,void * priv,v4l2_std_id * std)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
bcap_g_std(struct file * file,void * priv,v4l2_std_id * std)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
bcap_s_std(struct file * file,void * priv,v4l2_std_id std)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
bcap_enum_dv_timings(struct file * file,void * priv,struct v4l2_enum_dv_timings * timings)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
bcap_query_dv_timings(struct file * file,void * priv,struct v4l2_dv_timings * timings)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
bcap_g_dv_timings(struct file * file,void * priv,struct v4l2_dv_timings * timings)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
bcap_s_dv_timings(struct file * file,void * priv,struct v4l2_dv_timings * timings)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
bcap_enum_input(struct file * file,void * priv,struct v4l2_input * input)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
bcap_g_input(struct file * file,void * priv,unsigned int * index)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
bcap_s_input(struct file * file,void * priv,unsigned int index)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
bcap_try_format(struct bcap_device * bcap,struct v4l2_pix_format * pixfmt,struct bcap_format * bcap_fmt)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
bcap_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * fmt)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
bcap_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * fmt)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
bcap_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * fmt)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
bcap_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * fmt)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
bcap_querycap(struct file * file,void * priv,struct v4l2_capability * cap)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
bcap_g_parm(struct file * file,void * fh,struct v4l2_streamparm * a)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
bcap_s_parm(struct file * file,void * fh,struct v4l2_streamparm * a)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
bcap_log_status(struct file * file,void * priv)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 const 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
bcap_probe(struct platform_device * pdev)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 return -ENOMEM;
803
804 bcap_dev->cfg = config;
805
806 bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
807 if (!bcap_dev->ppi) {
808 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
809 ret = -ENODEV;
810 goto err_free_dev;
811 }
812 bcap_dev->ppi->priv = bcap_dev;
813
814 vfd = &bcap_dev->video_dev;
815 /* initialize field of video device */
816 vfd->release = video_device_release_empty;
817 vfd->fops = &bcap_fops;
818 vfd->ioctl_ops = &bcap_ioctl_ops;
819 vfd->tvnorms = 0;
820 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
821 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
822
823 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
824 if (ret) {
825 v4l2_err(pdev->dev.driver,
826 "Unable to register v4l2 device\n");
827 goto err_free_ppi;
828 }
829 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
830
831 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
832 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
833 if (ret) {
834 v4l2_err(&bcap_dev->v4l2_dev,
835 "Unable to init control handler\n");
836 goto err_unreg_v4l2;
837 }
838
839 spin_lock_init(&bcap_dev->lock);
840 /* initialize queue */
841 q = &bcap_dev->buffer_queue;
842 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
843 q->io_modes = VB2_MMAP | VB2_DMABUF;
844 q->drv_priv = bcap_dev;
845 q->buf_struct_size = sizeof(struct bcap_buffer);
846 q->ops = &bcap_video_qops;
847 q->mem_ops = &vb2_dma_contig_memops;
848 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
849 q->lock = &bcap_dev->mutex;
850 q->min_buffers_needed = 1;
851 q->dev = &pdev->dev;
852
853 ret = vb2_queue_init(q);
854 if (ret)
855 goto err_free_handler;
856
857 mutex_init(&bcap_dev->mutex);
858 init_completion(&bcap_dev->comp);
859
860 /* init video dma queues */
861 INIT_LIST_HEAD(&bcap_dev->dma_queue);
862
863 vfd->lock = &bcap_dev->mutex;
864 vfd->queue = q;
865
866 /* register video device */
867 ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
868 if (ret) {
869 v4l2_err(&bcap_dev->v4l2_dev,
870 "Unable to register video device\n");
871 goto err_free_handler;
872 }
873 video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
874 v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
875 video_device_node_name(vfd));
876
877 /* load up the subdevice */
878 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
879 if (!i2c_adap) {
880 v4l2_err(&bcap_dev->v4l2_dev,
881 "Unable to find i2c adapter\n");
882 ret = -ENODEV;
883 goto err_unreg_vdev;
884
885 }
886 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
887 i2c_adap,
888 &config->board_info,
889 NULL);
890 if (bcap_dev->sd) {
891 int i;
892
893 /* update tvnorms from the sub devices */
894 for (i = 0; i < config->num_inputs; i++)
895 vfd->tvnorms |= config->inputs[i].std;
896 } else {
897 v4l2_err(&bcap_dev->v4l2_dev,
898 "Unable to register sub device\n");
899 ret = -ENODEV;
900 goto err_unreg_vdev;
901 }
902
903 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
904
905 /*
906 * explicitly set input, otherwise some boards
907 * may not work at the state as we expected
908 */
909 route = &config->routes[0];
910 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
911 route->input, route->output, 0);
912 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
913 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
914 goto err_unreg_vdev;
915 }
916 bcap_dev->cur_input = 0;
917 /* if this route has specific config, update ppi control */
918 if (route->ppi_control)
919 config->ppi_control = route->ppi_control;
920
921 /* now we can probe the default state */
922 if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
923 v4l2_std_id std;
924 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
925 if (ret) {
926 v4l2_err(&bcap_dev->v4l2_dev,
927 "Unable to get std\n");
928 goto err_unreg_vdev;
929 }
930 bcap_dev->std = std;
931 }
932 if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
933 struct v4l2_dv_timings dv_timings;
934 ret = v4l2_subdev_call(bcap_dev->sd, video,
935 g_dv_timings, &dv_timings);
936 if (ret) {
937 v4l2_err(&bcap_dev->v4l2_dev,
938 "Unable to get dv timings\n");
939 goto err_unreg_vdev;
940 }
941 bcap_dev->dv_timings = dv_timings;
942 }
943 ret = bcap_init_sensor_formats(bcap_dev);
944 if (ret) {
945 v4l2_err(&bcap_dev->v4l2_dev,
946 "Unable to create sensor formats table\n");
947 goto err_unreg_vdev;
948 }
949 return 0;
950 err_unreg_vdev:
951 video_unregister_device(&bcap_dev->video_dev);
952 err_free_handler:
953 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
954 err_unreg_v4l2:
955 v4l2_device_unregister(&bcap_dev->v4l2_dev);
956 err_free_ppi:
957 ppi_delete_instance(bcap_dev->ppi);
958 err_free_dev:
959 kfree(bcap_dev);
960 return ret;
961 }
962
bcap_remove(struct platform_device * pdev)963 static int bcap_remove(struct platform_device *pdev)
964 {
965 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
966 struct bcap_device *bcap_dev = container_of(v4l2_dev,
967 struct bcap_device, v4l2_dev);
968
969 bcap_free_sensor_formats(bcap_dev);
970 video_unregister_device(&bcap_dev->video_dev);
971 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
972 v4l2_device_unregister(v4l2_dev);
973 ppi_delete_instance(bcap_dev->ppi);
974 kfree(bcap_dev);
975 return 0;
976 }
977
978 static struct platform_driver bcap_driver = {
979 .driver = {
980 .name = CAPTURE_DRV_NAME,
981 },
982 .probe = bcap_probe,
983 .remove = bcap_remove,
984 };
985 module_platform_driver(bcap_driver);
986
987 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
988 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
989 MODULE_LICENSE("GPL v2");
990