Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/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_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         /* queue of filled frames */
 95         struct list_head dma_queue;
 96         /* used in videobuf2 callback */
 97         spinlock_t lock;
 98         /* used to access capture device */
 99         struct mutex mutex;
100         /* used to wait ppi to complete one transfer */
101         struct completion comp;
102         /* prepare to stop */
103         bool stop;
104         /* vb2 buffer sequence counter */
105         unsigned sequence;
106 };
107 
108 static const struct bcap_format bcap_formats[] = {
109         {
110                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
111                 .pixelformat = V4L2_PIX_FMT_UYVY,
112                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_2X8,
113                 .bpp         = 16,
114                 .dlen        = 8,
115         },
116         {
117                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
118                 .pixelformat = V4L2_PIX_FMT_YUYV,
119                 .mbus_code   = MEDIA_BUS_FMT_YUYV8_2X8,
120                 .bpp         = 16,
121                 .dlen        = 8,
122         },
123         {
124                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
125                 .pixelformat = V4L2_PIX_FMT_UYVY,
126                 .mbus_code   = MEDIA_BUS_FMT_UYVY8_1X16,
127                 .bpp         = 16,
128                 .dlen        = 16,
129         },
130         {
131                 .desc        = "RGB 565",
132                 .pixelformat = V4L2_PIX_FMT_RGB565,
133                 .mbus_code   = MEDIA_BUS_FMT_RGB565_2X8_LE,
134                 .bpp         = 16,
135                 .dlen        = 8,
136         },
137         {
138                 .desc        = "RGB 444",
139                 .pixelformat = V4L2_PIX_FMT_RGB444,
140                 .mbus_code   = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
141                 .bpp         = 16,
142                 .dlen        = 8,
143         },
144 
145 };
146 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
147 
148 static irqreturn_t bcap_isr(int irq, void *dev_id);
149 
150 static struct bcap_buffer *to_bcap_vb(struct vb2_v4l2_buffer *vb)
151 {
152         return container_of(vb, struct bcap_buffer, vb);
153 }
154 
155 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
156 {
157         struct v4l2_subdev_mbus_code_enum code = {
158                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
159         };
160         struct bcap_format *sf;
161         unsigned int num_formats = 0;
162         int i, j;
163 
164         while (!v4l2_subdev_call(bcap_dev->sd, pad,
165                                 enum_mbus_code, NULL, &code)) {
166                 num_formats++;
167                 code.index++;
168         }
169         if (!num_formats)
170                 return -ENXIO;
171 
172         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
173         if (!sf)
174                 return -ENOMEM;
175 
176         for (i = 0; i < num_formats; i++) {
177                 code.index = i;
178                 v4l2_subdev_call(bcap_dev->sd, pad,
179                                 enum_mbus_code, NULL, &code);
180                 for (j = 0; j < BCAP_MAX_FMTS; j++)
181                         if (code.code == bcap_formats[j].mbus_code)
182                                 break;
183                 if (j == BCAP_MAX_FMTS) {
184                         /* we don't allow this sensor working with our bridge */
185                         kfree(sf);
186                         return -EINVAL;
187                 }
188                 sf[i] = bcap_formats[j];
189         }
190         bcap_dev->sensor_formats = sf;
191         bcap_dev->num_sensor_formats = num_formats;
192         return 0;
193 }
194 
195 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
196 {
197         bcap_dev->num_sensor_formats = 0;
198         kfree(bcap_dev->sensor_formats);
199         bcap_dev->sensor_formats = NULL;
200 }
201 
202 static int bcap_queue_setup(struct vb2_queue *vq,
203                                 unsigned int *nbuffers, unsigned int *nplanes,
204                                 unsigned int sizes[], struct device *alloc_devs[])
205 {
206         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
207 
208         if (vq->num_buffers + *nbuffers < 2)
209                 *nbuffers = 2;
210 
211         if (*nplanes)
212                 return sizes[0] < bcap_dev->fmt.sizeimage ? -EINVAL : 0;
213 
214         *nplanes = 1;
215         sizes[0] = bcap_dev->fmt.sizeimage;
216 
217         return 0;
218 }
219 
220 static int bcap_buffer_prepare(struct vb2_buffer *vb)
221 {
222         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
223         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
224         unsigned long size = bcap_dev->fmt.sizeimage;
225 
226         if (vb2_plane_size(vb, 0) < size) {
227                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
228                                 vb2_plane_size(vb, 0), size);
229                 return -EINVAL;
230         }
231         vb2_set_plane_payload(vb, 0, size);
232 
233         vbuf->field = bcap_dev->fmt.field;
234 
235         return 0;
236 }
237 
238 static void bcap_buffer_queue(struct vb2_buffer *vb)
239 {
240         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
241         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
242         struct bcap_buffer *buf = to_bcap_vb(vbuf);
243         unsigned long flags;
244 
245         spin_lock_irqsave(&bcap_dev->lock, flags);
246         list_add_tail(&buf->list, &bcap_dev->dma_queue);
247         spin_unlock_irqrestore(&bcap_dev->lock, flags);
248 }
249 
250 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
251 {
252         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
253         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
254         struct bcap_buffer *buf = to_bcap_vb(vbuf);
255         unsigned long flags;
256 
257         spin_lock_irqsave(&bcap_dev->lock, flags);
258         list_del_init(&buf->list);
259         spin_unlock_irqrestore(&bcap_dev->lock, flags);
260 }
261 
262 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
263 {
264         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
265         struct ppi_if *ppi = bcap_dev->ppi;
266         struct bcap_buffer *buf, *tmp;
267         struct ppi_params params;
268         dma_addr_t addr;
269         int ret;
270 
271         /* enable streamon on the sub device */
272         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
273         if (ret && (ret != -ENOIOCTLCMD)) {
274                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
275                 goto err;
276         }
277 
278         /* set ppi params */
279         params.width = bcap_dev->fmt.width;
280         params.height = bcap_dev->fmt.height;
281         params.bpp = bcap_dev->bpp;
282         params.dlen = bcap_dev->dlen;
283         params.ppi_control = bcap_dev->cfg->ppi_control;
284         params.int_mask = bcap_dev->cfg->int_mask;
285         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
286                         & V4L2_IN_CAP_DV_TIMINGS) {
287                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
288 
289                 params.hdelay = bt->hsync + bt->hbackporch;
290                 params.vdelay = bt->vsync + bt->vbackporch;
291                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
292                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
293         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
294                         & V4L2_IN_CAP_STD) {
295                 params.hdelay = 0;
296                 params.vdelay = 0;
297                 if (bcap_dev->std & V4L2_STD_525_60) {
298                         params.line = 858;
299                         params.frame = 525;
300                 } else {
301                         params.line = 864;
302                         params.frame = 625;
303                 }
304         } else {
305                 params.hdelay = 0;
306                 params.vdelay = 0;
307                 params.line = params.width + bcap_dev->cfg->blank_pixels;
308                 params.frame = params.height;
309         }
310         ret = ppi->ops->set_params(ppi, &params);
311         if (ret < 0) {
312                 v4l2_err(&bcap_dev->v4l2_dev,
313                                 "Error in setting ppi params\n");
314                 goto err;
315         }
316 
317         /* attach ppi DMA irq handler */
318         ret = ppi->ops->attach_irq(ppi, bcap_isr);
319         if (ret < 0) {
320                 v4l2_err(&bcap_dev->v4l2_dev,
321                                 "Error in attaching interrupt handler\n");
322                 goto err;
323         }
324 
325         bcap_dev->sequence = 0;
326 
327         reinit_completion(&bcap_dev->comp);
328         bcap_dev->stop = false;
329 
330         /* get the next frame from the dma queue */
331         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
332                                         struct bcap_buffer, list);
333         /* remove buffer from the dma queue */
334         list_del_init(&bcap_dev->cur_frm->list);
335         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb.vb2_buf,
336                                                 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, 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,
371                                 VB2_BUF_STATE_ERROR);
372 
373         while (!list_empty(&bcap_dev->dma_queue)) {
374                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
375                                                 struct bcap_buffer, list);
376                 list_del_init(&bcap_dev->cur_frm->list);
377                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
378                                 VB2_BUF_STATE_ERROR);
379         }
380 }
381 
382 static struct vb2_ops bcap_video_qops = {
383         .queue_setup            = bcap_queue_setup,
384         .buf_prepare            = bcap_buffer_prepare,
385         .buf_cleanup            = bcap_buffer_cleanup,
386         .buf_queue              = bcap_buffer_queue,
387         .wait_prepare           = vb2_ops_wait_prepare,
388         .wait_finish            = vb2_ops_wait_finish,
389         .start_streaming        = bcap_start_streaming,
390         .stop_streaming         = bcap_stop_streaming,
391 };
392 
393 static irqreturn_t bcap_isr(int irq, void *dev_id)
394 {
395         struct ppi_if *ppi = dev_id;
396         struct bcap_device *bcap_dev = ppi->priv;
397         struct vb2_v4l2_buffer *vbuf = &bcap_dev->cur_frm->vb;
398         struct vb2_buffer *vb = &vbuf->vb2_buf;
399         dma_addr_t addr;
400 
401         spin_lock(&bcap_dev->lock);
402 
403         if (!list_empty(&bcap_dev->dma_queue)) {
404                 vb->timestamp = ktime_get_ns();
405                 if (ppi->err) {
406                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
407                         ppi->err = false;
408                 } else {
409                         vbuf->sequence = bcap_dev->sequence++;
410                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
411                 }
412                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
413                                 struct bcap_buffer, list);
414                 list_del_init(&bcap_dev->cur_frm->list);
415         } else {
416                 /* clear error flag, we will get a new frame */
417                 if (ppi->err)
418                         ppi->err = false;
419         }
420 
421         ppi->ops->stop(ppi);
422 
423         if (bcap_dev->stop) {
424                 complete(&bcap_dev->comp);
425         } else {
426                 addr = vb2_dma_contig_plane_dma_addr(
427                                 &bcap_dev->cur_frm->vb.vb2_buf, 0);
428                 ppi->ops->update_addr(ppi, (unsigned long)addr);
429                 ppi->ops->start(ppi);
430         }
431 
432         spin_unlock(&bcap_dev->lock);
433 
434         return IRQ_HANDLED;
435 }
436 
437 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
438 {
439         struct bcap_device *bcap_dev = video_drvdata(file);
440         struct v4l2_input input;
441 
442         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
443         if (!(input.capabilities & V4L2_IN_CAP_STD))
444                 return -ENODATA;
445 
446         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
447 }
448 
449 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
450 {
451         struct bcap_device *bcap_dev = video_drvdata(file);
452         struct v4l2_input input;
453 
454         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
455         if (!(input.capabilities & V4L2_IN_CAP_STD))
456                 return -ENODATA;
457 
458         *std = bcap_dev->std;
459         return 0;
460 }
461 
462 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
463 {
464         struct bcap_device *bcap_dev = video_drvdata(file);
465         struct v4l2_input input;
466         int ret;
467 
468         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
469         if (!(input.capabilities & V4L2_IN_CAP_STD))
470                 return -ENODATA;
471 
472         if (vb2_is_busy(&bcap_dev->buffer_queue))
473                 return -EBUSY;
474 
475         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
476         if (ret < 0)
477                 return ret;
478 
479         bcap_dev->std = std;
480         return 0;
481 }
482 
483 static int bcap_enum_dv_timings(struct file *file, void *priv,
484                                 struct v4l2_enum_dv_timings *timings)
485 {
486         struct bcap_device *bcap_dev = video_drvdata(file);
487         struct v4l2_input input;
488 
489         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
490         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
491                 return -ENODATA;
492 
493         timings->pad = 0;
494 
495         return v4l2_subdev_call(bcap_dev->sd, pad,
496                         enum_dv_timings, timings);
497 }
498 
499 static int bcap_query_dv_timings(struct file *file, void *priv,
500                                 struct v4l2_dv_timings *timings)
501 {
502         struct bcap_device *bcap_dev = video_drvdata(file);
503         struct v4l2_input input;
504 
505         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
506         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
507                 return -ENODATA;
508 
509         return v4l2_subdev_call(bcap_dev->sd, video,
510                                 query_dv_timings, timings);
511 }
512 
513 static int bcap_g_dv_timings(struct file *file, void *priv,
514                                 struct v4l2_dv_timings *timings)
515 {
516         struct bcap_device *bcap_dev = video_drvdata(file);
517         struct v4l2_input input;
518 
519         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
520         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
521                 return -ENODATA;
522 
523         *timings = bcap_dev->dv_timings;
524         return 0;
525 }
526 
527 static int bcap_s_dv_timings(struct file *file, void *priv,
528                                 struct v4l2_dv_timings *timings)
529 {
530         struct bcap_device *bcap_dev = video_drvdata(file);
531         struct v4l2_input input;
532         int ret;
533 
534         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
535         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
536                 return -ENODATA;
537 
538         if (vb2_is_busy(&bcap_dev->buffer_queue))
539                 return -EBUSY;
540 
541         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
542         if (ret < 0)
543                 return ret;
544 
545         bcap_dev->dv_timings = *timings;
546         return 0;
547 }
548 
549 static int bcap_enum_input(struct file *file, void *priv,
550                                 struct v4l2_input *input)
551 {
552         struct bcap_device *bcap_dev = video_drvdata(file);
553         struct bfin_capture_config *config = bcap_dev->cfg;
554         int ret;
555         u32 status;
556 
557         if (input->index >= config->num_inputs)
558                 return -EINVAL;
559 
560         *input = config->inputs[input->index];
561         /* get input status */
562         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
563         if (!ret)
564                 input->status = status;
565         return 0;
566 }
567 
568 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
569 {
570         struct bcap_device *bcap_dev = video_drvdata(file);
571 
572         *index = bcap_dev->cur_input;
573         return 0;
574 }
575 
576 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
577 {
578         struct bcap_device *bcap_dev = video_drvdata(file);
579         struct bfin_capture_config *config = bcap_dev->cfg;
580         struct bcap_route *route;
581         int ret;
582 
583         if (vb2_is_busy(&bcap_dev->buffer_queue))
584                 return -EBUSY;
585 
586         if (index >= config->num_inputs)
587                 return -EINVAL;
588 
589         route = &config->routes[index];
590         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
591                                 route->input, route->output, 0);
592         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
593                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
594                 return ret;
595         }
596         bcap_dev->cur_input = index;
597         /* if this route has specific config, update ppi control */
598         if (route->ppi_control)
599                 config->ppi_control = route->ppi_control;
600         return 0;
601 }
602 
603 static int bcap_try_format(struct bcap_device *bcap,
604                                 struct v4l2_pix_format *pixfmt,
605                                 struct bcap_format *bcap_fmt)
606 {
607         struct bcap_format *sf = bcap->sensor_formats;
608         struct bcap_format *fmt = NULL;
609         struct v4l2_subdev_pad_config pad_cfg;
610         struct v4l2_subdev_format format = {
611                 .which = V4L2_SUBDEV_FORMAT_TRY,
612         };
613         int ret, i;
614 
615         for (i = 0; i < bcap->num_sensor_formats; i++) {
616                 fmt = &sf[i];
617                 if (pixfmt->pixelformat == fmt->pixelformat)
618                         break;
619         }
620         if (i == bcap->num_sensor_formats)
621                 fmt = &sf[0];
622 
623         v4l2_fill_mbus_format(&format.format, pixfmt, fmt->mbus_code);
624         ret = v4l2_subdev_call(bcap->sd, pad, set_fmt, &pad_cfg,
625                                 &format);
626         if (ret < 0)
627                 return ret;
628         v4l2_fill_pix_format(pixfmt, &format.format);
629         if (bcap_fmt) {
630                 for (i = 0; i < bcap->num_sensor_formats; i++) {
631                         fmt = &sf[i];
632                         if (format.format.code == fmt->mbus_code)
633                                 break;
634                 }
635                 *bcap_fmt = *fmt;
636         }
637         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
638         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
639         return 0;
640 }
641 
642 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
643                                         struct v4l2_fmtdesc *fmt)
644 {
645         struct bcap_device *bcap_dev = video_drvdata(file);
646         struct bcap_format *sf = bcap_dev->sensor_formats;
647 
648         if (fmt->index >= bcap_dev->num_sensor_formats)
649                 return -EINVAL;
650 
651         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
652         strlcpy(fmt->description,
653                 sf[fmt->index].desc,
654                 sizeof(fmt->description));
655         fmt->pixelformat = sf[fmt->index].pixelformat;
656         return 0;
657 }
658 
659 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
660                                         struct v4l2_format *fmt)
661 {
662         struct bcap_device *bcap_dev = video_drvdata(file);
663         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
664 
665         return bcap_try_format(bcap_dev, pixfmt, NULL);
666 }
667 
668 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
669                                 struct v4l2_format *fmt)
670 {
671         struct bcap_device *bcap_dev = video_drvdata(file);
672 
673         fmt->fmt.pix = bcap_dev->fmt;
674         return 0;
675 }
676 
677 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
678                                 struct v4l2_format *fmt)
679 {
680         struct bcap_device *bcap_dev = video_drvdata(file);
681         struct v4l2_subdev_format format = {
682                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
683         };
684         struct bcap_format bcap_fmt;
685         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
686         int ret;
687 
688         if (vb2_is_busy(&bcap_dev->buffer_queue))
689                 return -EBUSY;
690 
691         /* see if format works */
692         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
693         if (ret < 0)
694                 return ret;
695 
696         v4l2_fill_mbus_format(&format.format, pixfmt, bcap_fmt.mbus_code);
697         ret = v4l2_subdev_call(bcap_dev->sd, pad, set_fmt, NULL, &format);
698         if (ret < 0)
699                 return ret;
700         bcap_dev->fmt = *pixfmt;
701         bcap_dev->bpp = bcap_fmt.bpp;
702         bcap_dev->dlen = bcap_fmt.dlen;
703         return 0;
704 }
705 
706 static int bcap_querycap(struct file *file, void  *priv,
707                                 struct v4l2_capability *cap)
708 {
709         struct bcap_device *bcap_dev = video_drvdata(file);
710 
711         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
712         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
713         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
714         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
715         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
716         return 0;
717 }
718 
719 static int bcap_g_parm(struct file *file, void *fh,
720                                 struct v4l2_streamparm *a)
721 {
722         struct bcap_device *bcap_dev = video_drvdata(file);
723 
724         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
725                 return -EINVAL;
726         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
727 }
728 
729 static int bcap_s_parm(struct file *file, void *fh,
730                                 struct v4l2_streamparm *a)
731 {
732         struct bcap_device *bcap_dev = video_drvdata(file);
733 
734         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
735                 return -EINVAL;
736         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
737 }
738 
739 static int bcap_log_status(struct file *file, void *priv)
740 {
741         struct bcap_device *bcap_dev = video_drvdata(file);
742         /* status for sub devices */
743         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
744         return 0;
745 }
746 
747 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
748         .vidioc_querycap         = bcap_querycap,
749         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
750         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
751         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
752         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
753         .vidioc_enum_input       = bcap_enum_input,
754         .vidioc_g_input          = bcap_g_input,
755         .vidioc_s_input          = bcap_s_input,
756         .vidioc_querystd         = bcap_querystd,
757         .vidioc_s_std            = bcap_s_std,
758         .vidioc_g_std            = bcap_g_std,
759         .vidioc_s_dv_timings     = bcap_s_dv_timings,
760         .vidioc_g_dv_timings     = bcap_g_dv_timings,
761         .vidioc_query_dv_timings = bcap_query_dv_timings,
762         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
763         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
764         .vidioc_create_bufs      = vb2_ioctl_create_bufs,
765         .vidioc_querybuf         = vb2_ioctl_querybuf,
766         .vidioc_qbuf             = vb2_ioctl_qbuf,
767         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
768         .vidioc_expbuf           = vb2_ioctl_expbuf,
769         .vidioc_streamon         = vb2_ioctl_streamon,
770         .vidioc_streamoff        = vb2_ioctl_streamoff,
771         .vidioc_g_parm           = bcap_g_parm,
772         .vidioc_s_parm           = bcap_s_parm,
773         .vidioc_log_status       = bcap_log_status,
774 };
775 
776 static struct v4l2_file_operations bcap_fops = {
777         .owner = THIS_MODULE,
778         .open = v4l2_fh_open,
779         .release = vb2_fop_release,
780         .unlocked_ioctl = video_ioctl2,
781         .mmap = vb2_fop_mmap,
782 #ifndef CONFIG_MMU
783         .get_unmapped_area = vb2_fop_get_unmapped_area,
784 #endif
785         .poll = vb2_fop_poll
786 };
787 
788 static int bcap_probe(struct platform_device *pdev)
789 {
790         struct bcap_device *bcap_dev;
791         struct video_device *vfd;
792         struct i2c_adapter *i2c_adap;
793         struct bfin_capture_config *config;
794         struct vb2_queue *q;
795         struct bcap_route *route;
796         int ret;
797 
798         config = pdev->dev.platform_data;
799         if (!config || !config->num_inputs) {
800                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
801                 return -ENODEV;
802         }
803 
804         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
805         if (!bcap_dev) {
806                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
807                 return -ENOMEM;
808         }
809 
810         bcap_dev->cfg = config;
811 
812         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
813         if (!bcap_dev->ppi) {
814                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
815                 ret = -ENODEV;
816                 goto err_free_dev;
817         }
818         bcap_dev->ppi->priv = bcap_dev;
819 
820         vfd = &bcap_dev->video_dev;
821         /* initialize field of video device */
822         vfd->release            = video_device_release_empty;
823         vfd->fops               = &bcap_fops;
824         vfd->ioctl_ops          = &bcap_ioctl_ops;
825         vfd->tvnorms            = 0;
826         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
827         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
828 
829         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
830         if (ret) {
831                 v4l2_err(pdev->dev.driver,
832                                 "Unable to register v4l2 device\n");
833                 goto err_free_ppi;
834         }
835         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
836 
837         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
838         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
839         if (ret) {
840                 v4l2_err(&bcap_dev->v4l2_dev,
841                                 "Unable to init control handler\n");
842                 goto err_unreg_v4l2;
843         }
844 
845         spin_lock_init(&bcap_dev->lock);
846         /* initialize queue */
847         q = &bcap_dev->buffer_queue;
848         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
849         q->io_modes = VB2_MMAP | VB2_DMABUF;
850         q->drv_priv = bcap_dev;
851         q->buf_struct_size = sizeof(struct bcap_buffer);
852         q->ops = &bcap_video_qops;
853         q->mem_ops = &vb2_dma_contig_memops;
854         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
855         q->lock = &bcap_dev->mutex;
856         q->min_buffers_needed = 1;
857         q->dev = &pdev->dev;
858 
859         ret = vb2_queue_init(q);
860         if (ret)
861                 goto err_free_handler;
862 
863         mutex_init(&bcap_dev->mutex);
864         init_completion(&bcap_dev->comp);
865 
866         /* init video dma queues */
867         INIT_LIST_HEAD(&bcap_dev->dma_queue);
868 
869         vfd->lock = &bcap_dev->mutex;
870         vfd->queue = q;
871 
872         /* register video device */
873         ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
874         if (ret) {
875                 v4l2_err(&bcap_dev->v4l2_dev,
876                                 "Unable to register video device\n");
877                 goto err_free_handler;
878         }
879         video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
880         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
881                         video_device_node_name(vfd));
882 
883         /* load up the subdevice */
884         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
885         if (!i2c_adap) {
886                 v4l2_err(&bcap_dev->v4l2_dev,
887                                 "Unable to find i2c adapter\n");
888                 ret = -ENODEV;
889                 goto err_unreg_vdev;
890 
891         }
892         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
893                                                  i2c_adap,
894                                                  &config->board_info,
895                                                  NULL);
896         if (bcap_dev->sd) {
897                 int i;
898 
899                 /* update tvnorms from the sub devices */
900                 for (i = 0; i < config->num_inputs; i++)
901                         vfd->tvnorms |= config->inputs[i].std;
902         } else {
903                 v4l2_err(&bcap_dev->v4l2_dev,
904                                 "Unable to register sub device\n");
905                 ret = -ENODEV;
906                 goto err_unreg_vdev;
907         }
908 
909         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
910 
911         /*
912          * explicitly set input, otherwise some boards
913          * may not work at the state as we expected
914          */
915         route = &config->routes[0];
916         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
917                                 route->input, route->output, 0);
918         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
919                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
920                 goto err_unreg_vdev;
921         }
922         bcap_dev->cur_input = 0;
923         /* if this route has specific config, update ppi control */
924         if (route->ppi_control)
925                 config->ppi_control = route->ppi_control;
926 
927         /* now we can probe the default state */
928         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
929                 v4l2_std_id std;
930                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
931                 if (ret) {
932                         v4l2_err(&bcap_dev->v4l2_dev,
933                                         "Unable to get std\n");
934                         goto err_unreg_vdev;
935                 }
936                 bcap_dev->std = std;
937         }
938         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
939                 struct v4l2_dv_timings dv_timings;
940                 ret = v4l2_subdev_call(bcap_dev->sd, video,
941                                 g_dv_timings, &dv_timings);
942                 if (ret) {
943                         v4l2_err(&bcap_dev->v4l2_dev,
944                                         "Unable to get dv timings\n");
945                         goto err_unreg_vdev;
946                 }
947                 bcap_dev->dv_timings = dv_timings;
948         }
949         ret = bcap_init_sensor_formats(bcap_dev);
950         if (ret) {
951                 v4l2_err(&bcap_dev->v4l2_dev,
952                                 "Unable to create sensor formats table\n");
953                 goto err_unreg_vdev;
954         }
955         return 0;
956 err_unreg_vdev:
957         video_unregister_device(&bcap_dev->video_dev);
958 err_free_handler:
959         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
960 err_unreg_v4l2:
961         v4l2_device_unregister(&bcap_dev->v4l2_dev);
962 err_free_ppi:
963         ppi_delete_instance(bcap_dev->ppi);
964 err_free_dev:
965         kfree(bcap_dev);
966         return ret;
967 }
968 
969 static int bcap_remove(struct platform_device *pdev)
970 {
971         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
972         struct bcap_device *bcap_dev = container_of(v4l2_dev,
973                                                 struct bcap_device, v4l2_dev);
974 
975         bcap_free_sensor_formats(bcap_dev);
976         video_unregister_device(&bcap_dev->video_dev);
977         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
978         v4l2_device_unregister(v4l2_dev);
979         ppi_delete_instance(bcap_dev->ppi);
980         kfree(bcap_dev);
981         return 0;
982 }
983 
984 static struct platform_driver bcap_driver = {
985         .driver = {
986                 .name  = CAPTURE_DRV_NAME,
987         },
988         .probe = bcap_probe,
989         .remove = bcap_remove,
990 };
991 module_platform_driver(bcap_driver);
992 
993 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
994 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
995 MODULE_LICENSE("GPL v2");
996 

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