Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 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

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         /* 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                                 const void *parg,
206                                 unsigned int *nbuffers, unsigned int *nplanes,
207                                 unsigned int sizes[], void *alloc_ctxs[])
208 {
209         const struct v4l2_format *fmt = parg;
210         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
211 
212         if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
213                 return -EINVAL;
214 
215         if (vq->num_buffers + *nbuffers < 2)
216                 *nbuffers = 2;
217 
218         *nplanes = 1;
219         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
220         alloc_ctxs[0] = bcap_dev->alloc_ctx;
221 
222         return 0;
223 }
224 
225 static int bcap_buffer_prepare(struct vb2_buffer *vb)
226 {
227         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
228         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
229         unsigned long size = bcap_dev->fmt.sizeimage;
230 
231         if (vb2_plane_size(vb, 0) < size) {
232                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
233                                 vb2_plane_size(vb, 0), size);
234                 return -EINVAL;
235         }
236         vb2_set_plane_payload(vb, 0, size);
237 
238         vbuf->field = bcap_dev->fmt.field;
239 
240         return 0;
241 }
242 
243 static void bcap_buffer_queue(struct vb2_buffer *vb)
244 {
245         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
246         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
247         struct bcap_buffer *buf = to_bcap_vb(vbuf);
248         unsigned long flags;
249 
250         spin_lock_irqsave(&bcap_dev->lock, flags);
251         list_add_tail(&buf->list, &bcap_dev->dma_queue);
252         spin_unlock_irqrestore(&bcap_dev->lock, flags);
253 }
254 
255 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
256 {
257         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
258         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
259         struct bcap_buffer *buf = to_bcap_vb(vbuf);
260         unsigned long flags;
261 
262         spin_lock_irqsave(&bcap_dev->lock, flags);
263         list_del_init(&buf->list);
264         spin_unlock_irqrestore(&bcap_dev->lock, flags);
265 }
266 
267 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
268 {
269         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
270         struct ppi_if *ppi = bcap_dev->ppi;
271         struct bcap_buffer *buf, *tmp;
272         struct ppi_params params;
273         dma_addr_t addr;
274         int ret;
275 
276         /* enable streamon on the sub device */
277         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
278         if (ret && (ret != -ENOIOCTLCMD)) {
279                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
280                 goto err;
281         }
282 
283         /* set ppi params */
284         params.width = bcap_dev->fmt.width;
285         params.height = bcap_dev->fmt.height;
286         params.bpp = bcap_dev->bpp;
287         params.dlen = bcap_dev->dlen;
288         params.ppi_control = bcap_dev->cfg->ppi_control;
289         params.int_mask = bcap_dev->cfg->int_mask;
290         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
291                         & V4L2_IN_CAP_DV_TIMINGS) {
292                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
293 
294                 params.hdelay = bt->hsync + bt->hbackporch;
295                 params.vdelay = bt->vsync + bt->vbackporch;
296                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
297                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
298         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
299                         & V4L2_IN_CAP_STD) {
300                 params.hdelay = 0;
301                 params.vdelay = 0;
302                 if (bcap_dev->std & V4L2_STD_525_60) {
303                         params.line = 858;
304                         params.frame = 525;
305                 } else {
306                         params.line = 864;
307                         params.frame = 625;
308                 }
309         } else {
310                 params.hdelay = 0;
311                 params.vdelay = 0;
312                 params.line = params.width + bcap_dev->cfg->blank_pixels;
313                 params.frame = params.height;
314         }
315         ret = ppi->ops->set_params(ppi, &params);
316         if (ret < 0) {
317                 v4l2_err(&bcap_dev->v4l2_dev,
318                                 "Error in setting ppi params\n");
319                 goto err;
320         }
321 
322         /* attach ppi DMA irq handler */
323         ret = ppi->ops->attach_irq(ppi, bcap_isr);
324         if (ret < 0) {
325                 v4l2_err(&bcap_dev->v4l2_dev,
326                                 "Error in attaching interrupt handler\n");
327                 goto err;
328         }
329 
330         bcap_dev->sequence = 0;
331 
332         reinit_completion(&bcap_dev->comp);
333         bcap_dev->stop = false;
334 
335         /* get the next frame from the dma queue */
336         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
337                                         struct bcap_buffer, list);
338         /* remove buffer from the dma queue */
339         list_del_init(&bcap_dev->cur_frm->list);
340         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb.vb2_buf,
341                                                 0);
342         /* update DMA address */
343         ppi->ops->update_addr(ppi, (unsigned long)addr);
344         /* enable ppi */
345         ppi->ops->start(ppi);
346 
347         return 0;
348 
349 err:
350         list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
351                 list_del(&buf->list);
352                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
353         }
354 
355         return ret;
356 }
357 
358 static void bcap_stop_streaming(struct vb2_queue *vq)
359 {
360         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
361         struct ppi_if *ppi = bcap_dev->ppi;
362         int ret;
363 
364         bcap_dev->stop = true;
365         wait_for_completion(&bcap_dev->comp);
366         ppi->ops->stop(ppi);
367         ppi->ops->detach_irq(ppi);
368         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
369         if (ret && (ret != -ENOIOCTLCMD))
370                 v4l2_err(&bcap_dev->v4l2_dev,
371                                 "stream off failed in subdev\n");
372 
373         /* release all active buffers */
374         if (bcap_dev->cur_frm)
375                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
376                                 VB2_BUF_STATE_ERROR);
377 
378         while (!list_empty(&bcap_dev->dma_queue)) {
379                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
380                                                 struct bcap_buffer, list);
381                 list_del_init(&bcap_dev->cur_frm->list);
382                 vb2_buffer_done(&bcap_dev->cur_frm->vb.vb2_buf,
383                                 VB2_BUF_STATE_ERROR);
384         }
385 }
386 
387 static struct vb2_ops bcap_video_qops = {
388         .queue_setup            = bcap_queue_setup,
389         .buf_prepare            = bcap_buffer_prepare,
390         .buf_cleanup            = bcap_buffer_cleanup,
391         .buf_queue              = bcap_buffer_queue,
392         .wait_prepare           = vb2_ops_wait_prepare,
393         .wait_finish            = vb2_ops_wait_finish,
394         .start_streaming        = bcap_start_streaming,
395         .stop_streaming         = bcap_stop_streaming,
396 };
397 
398 static irqreturn_t bcap_isr(int irq, void *dev_id)
399 {
400         struct ppi_if *ppi = dev_id;
401         struct bcap_device *bcap_dev = ppi->priv;
402         struct vb2_v4l2_buffer *vbuf = &bcap_dev->cur_frm->vb;
403         struct vb2_buffer *vb = &vbuf->vb2_buf;
404         dma_addr_t addr;
405 
406         spin_lock(&bcap_dev->lock);
407 
408         if (!list_empty(&bcap_dev->dma_queue)) {
409                 v4l2_get_timestamp(&vbuf->timestamp);
410                 if (ppi->err) {
411                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
412                         ppi->err = false;
413                 } else {
414                         vbuf->sequence = bcap_dev->sequence++;
415                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
416                 }
417                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
418                                 struct bcap_buffer, list);
419                 list_del_init(&bcap_dev->cur_frm->list);
420         } else {
421                 /* clear error flag, we will get a new frame */
422                 if (ppi->err)
423                         ppi->err = false;
424         }
425 
426         ppi->ops->stop(ppi);
427 
428         if (bcap_dev->stop) {
429                 complete(&bcap_dev->comp);
430         } else {
431                 addr = vb2_dma_contig_plane_dma_addr(
432                                 &bcap_dev->cur_frm->vb.vb2_buf, 0);
433                 ppi->ops->update_addr(ppi, (unsigned long)addr);
434                 ppi->ops->start(ppi);
435         }
436 
437         spin_unlock(&bcap_dev->lock);
438 
439         return IRQ_HANDLED;
440 }
441 
442 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
443 {
444         struct bcap_device *bcap_dev = video_drvdata(file);
445         struct v4l2_input input;
446 
447         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
448         if (!(input.capabilities & V4L2_IN_CAP_STD))
449                 return -ENODATA;
450 
451         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
452 }
453 
454 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
455 {
456         struct bcap_device *bcap_dev = video_drvdata(file);
457         struct v4l2_input input;
458 
459         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
460         if (!(input.capabilities & V4L2_IN_CAP_STD))
461                 return -ENODATA;
462 
463         *std = bcap_dev->std;
464         return 0;
465 }
466 
467 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
468 {
469         struct bcap_device *bcap_dev = video_drvdata(file);
470         struct v4l2_input input;
471         int ret;
472 
473         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
474         if (!(input.capabilities & V4L2_IN_CAP_STD))
475                 return -ENODATA;
476 
477         if (vb2_is_busy(&bcap_dev->buffer_queue))
478                 return -EBUSY;
479 
480         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
481         if (ret < 0)
482                 return ret;
483 
484         bcap_dev->std = std;
485         return 0;
486 }
487 
488 static int bcap_enum_dv_timings(struct file *file, void *priv,
489                                 struct v4l2_enum_dv_timings *timings)
490 {
491         struct bcap_device *bcap_dev = video_drvdata(file);
492         struct v4l2_input input;
493 
494         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
495         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
496                 return -ENODATA;
497 
498         timings->pad = 0;
499 
500         return v4l2_subdev_call(bcap_dev->sd, pad,
501                         enum_dv_timings, timings);
502 }
503 
504 static int bcap_query_dv_timings(struct file *file, void *priv,
505                                 struct v4l2_dv_timings *timings)
506 {
507         struct bcap_device *bcap_dev = video_drvdata(file);
508         struct v4l2_input input;
509 
510         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
511         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
512                 return -ENODATA;
513 
514         return v4l2_subdev_call(bcap_dev->sd, video,
515                                 query_dv_timings, timings);
516 }
517 
518 static int bcap_g_dv_timings(struct file *file, void *priv,
519                                 struct v4l2_dv_timings *timings)
520 {
521         struct bcap_device *bcap_dev = video_drvdata(file);
522         struct v4l2_input input;
523 
524         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
525         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
526                 return -ENODATA;
527 
528         *timings = bcap_dev->dv_timings;
529         return 0;
530 }
531 
532 static int bcap_s_dv_timings(struct file *file, void *priv,
533                                 struct v4l2_dv_timings *timings)
534 {
535         struct bcap_device *bcap_dev = video_drvdata(file);
536         struct v4l2_input input;
537         int ret;
538 
539         input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
540         if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
541                 return -ENODATA;
542 
543         if (vb2_is_busy(&bcap_dev->buffer_queue))
544                 return -EBUSY;
545 
546         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
547         if (ret < 0)
548                 return ret;
549 
550         bcap_dev->dv_timings = *timings;
551         return 0;
552 }
553 
554 static int bcap_enum_input(struct file *file, void *priv,
555                                 struct v4l2_input *input)
556 {
557         struct bcap_device *bcap_dev = video_drvdata(file);
558         struct bfin_capture_config *config = bcap_dev->cfg;
559         int ret;
560         u32 status;
561 
562         if (input->index >= config->num_inputs)
563                 return -EINVAL;
564 
565         *input = config->inputs[input->index];
566         /* get input status */
567         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
568         if (!ret)
569                 input->status = status;
570         return 0;
571 }
572 
573 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
574 {
575         struct bcap_device *bcap_dev = video_drvdata(file);
576 
577         *index = bcap_dev->cur_input;
578         return 0;
579 }
580 
581 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
582 {
583         struct bcap_device *bcap_dev = video_drvdata(file);
584         struct bfin_capture_config *config = bcap_dev->cfg;
585         struct bcap_route *route;
586         int ret;
587 
588         if (vb2_is_busy(&bcap_dev->buffer_queue))
589                 return -EBUSY;
590 
591         if (index >= config->num_inputs)
592                 return -EINVAL;
593 
594         route = &config->routes[index];
595         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
596                                 route->input, route->output, 0);
597         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
598                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
599                 return ret;
600         }
601         bcap_dev->cur_input = index;
602         /* if this route has specific config, update ppi control */
603         if (route->ppi_control)
604                 config->ppi_control = route->ppi_control;
605         return 0;
606 }
607 
608 static int bcap_try_format(struct bcap_device *bcap,
609                                 struct v4l2_pix_format *pixfmt,
610                                 struct bcap_format *bcap_fmt)
611 {
612         struct bcap_format *sf = bcap->sensor_formats;
613         struct bcap_format *fmt = NULL;
614         struct v4l2_subdev_pad_config pad_cfg;
615         struct v4l2_subdev_format format = {
616                 .which = V4L2_SUBDEV_FORMAT_TRY,
617         };
618         int ret, i;
619 
620         for (i = 0; i < bcap->num_sensor_formats; i++) {
621                 fmt = &sf[i];
622                 if (pixfmt->pixelformat == fmt->pixelformat)
623                         break;
624         }
625         if (i == bcap->num_sensor_formats)
626                 fmt = &sf[0];
627 
628         v4l2_fill_mbus_format(&format.format, pixfmt, fmt->mbus_code);
629         ret = v4l2_subdev_call(bcap->sd, pad, set_fmt, &pad_cfg,
630                                 &format);
631         if (ret < 0)
632                 return ret;
633         v4l2_fill_pix_format(pixfmt, &format.format);
634         if (bcap_fmt) {
635                 for (i = 0; i < bcap->num_sensor_formats; i++) {
636                         fmt = &sf[i];
637                         if (format.format.code == fmt->mbus_code)
638                                 break;
639                 }
640                 *bcap_fmt = *fmt;
641         }
642         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
643         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
644         return 0;
645 }
646 
647 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
648                                         struct v4l2_fmtdesc *fmt)
649 {
650         struct bcap_device *bcap_dev = video_drvdata(file);
651         struct bcap_format *sf = bcap_dev->sensor_formats;
652 
653         if (fmt->index >= bcap_dev->num_sensor_formats)
654                 return -EINVAL;
655 
656         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
657         strlcpy(fmt->description,
658                 sf[fmt->index].desc,
659                 sizeof(fmt->description));
660         fmt->pixelformat = sf[fmt->index].pixelformat;
661         return 0;
662 }
663 
664 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
665                                         struct v4l2_format *fmt)
666 {
667         struct bcap_device *bcap_dev = video_drvdata(file);
668         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
669 
670         return bcap_try_format(bcap_dev, pixfmt, NULL);
671 }
672 
673 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
674                                 struct v4l2_format *fmt)
675 {
676         struct bcap_device *bcap_dev = video_drvdata(file);
677 
678         fmt->fmt.pix = bcap_dev->fmt;
679         return 0;
680 }
681 
682 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
683                                 struct v4l2_format *fmt)
684 {
685         struct bcap_device *bcap_dev = video_drvdata(file);
686         struct v4l2_subdev_format format = {
687                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
688         };
689         struct bcap_format bcap_fmt;
690         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
691         int ret;
692 
693         if (vb2_is_busy(&bcap_dev->buffer_queue))
694                 return -EBUSY;
695 
696         /* see if format works */
697         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
698         if (ret < 0)
699                 return ret;
700 
701         v4l2_fill_mbus_format(&format.format, pixfmt, bcap_fmt.mbus_code);
702         ret = v4l2_subdev_call(bcap_dev->sd, pad, set_fmt, NULL, &format);
703         if (ret < 0)
704                 return ret;
705         bcap_dev->fmt = *pixfmt;
706         bcap_dev->bpp = bcap_fmt.bpp;
707         bcap_dev->dlen = bcap_fmt.dlen;
708         return 0;
709 }
710 
711 static int bcap_querycap(struct file *file, void  *priv,
712                                 struct v4l2_capability *cap)
713 {
714         struct bcap_device *bcap_dev = video_drvdata(file);
715 
716         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
717         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
718         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
719         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
720         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
721         return 0;
722 }
723 
724 static int bcap_g_parm(struct file *file, void *fh,
725                                 struct v4l2_streamparm *a)
726 {
727         struct bcap_device *bcap_dev = video_drvdata(file);
728 
729         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
730                 return -EINVAL;
731         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
732 }
733 
734 static int bcap_s_parm(struct file *file, void *fh,
735                                 struct v4l2_streamparm *a)
736 {
737         struct bcap_device *bcap_dev = video_drvdata(file);
738 
739         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
740                 return -EINVAL;
741         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
742 }
743 
744 static int bcap_log_status(struct file *file, void *priv)
745 {
746         struct bcap_device *bcap_dev = video_drvdata(file);
747         /* status for sub devices */
748         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
749         return 0;
750 }
751 
752 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
753         .vidioc_querycap         = bcap_querycap,
754         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
755         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
756         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
757         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
758         .vidioc_enum_input       = bcap_enum_input,
759         .vidioc_g_input          = bcap_g_input,
760         .vidioc_s_input          = bcap_s_input,
761         .vidioc_querystd         = bcap_querystd,
762         .vidioc_s_std            = bcap_s_std,
763         .vidioc_g_std            = bcap_g_std,
764         .vidioc_s_dv_timings     = bcap_s_dv_timings,
765         .vidioc_g_dv_timings     = bcap_g_dv_timings,
766         .vidioc_query_dv_timings = bcap_query_dv_timings,
767         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
768         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
769         .vidioc_create_bufs      = vb2_ioctl_create_bufs,
770         .vidioc_querybuf         = vb2_ioctl_querybuf,
771         .vidioc_qbuf             = vb2_ioctl_qbuf,
772         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
773         .vidioc_expbuf           = vb2_ioctl_expbuf,
774         .vidioc_streamon         = vb2_ioctl_streamon,
775         .vidioc_streamoff        = vb2_ioctl_streamoff,
776         .vidioc_g_parm           = bcap_g_parm,
777         .vidioc_s_parm           = bcap_s_parm,
778         .vidioc_log_status       = bcap_log_status,
779 };
780 
781 static struct v4l2_file_operations bcap_fops = {
782         .owner = THIS_MODULE,
783         .open = v4l2_fh_open,
784         .release = vb2_fop_release,
785         .unlocked_ioctl = video_ioctl2,
786         .mmap = vb2_fop_mmap,
787 #ifndef CONFIG_MMU
788         .get_unmapped_area = vb2_fop_get_unmapped_area,
789 #endif
790         .poll = vb2_fop_poll
791 };
792 
793 static int bcap_probe(struct platform_device *pdev)
794 {
795         struct bcap_device *bcap_dev;
796         struct video_device *vfd;
797         struct i2c_adapter *i2c_adap;
798         struct bfin_capture_config *config;
799         struct vb2_queue *q;
800         struct bcap_route *route;
801         int ret;
802 
803         config = pdev->dev.platform_data;
804         if (!config || !config->num_inputs) {
805                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
806                 return -ENODEV;
807         }
808 
809         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
810         if (!bcap_dev) {
811                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
812                 return -ENOMEM;
813         }
814 
815         bcap_dev->cfg = config;
816 
817         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
818         if (!bcap_dev->ppi) {
819                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
820                 ret = -ENODEV;
821                 goto err_free_dev;
822         }
823         bcap_dev->ppi->priv = bcap_dev;
824 
825         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
826         if (IS_ERR(bcap_dev->alloc_ctx)) {
827                 ret = PTR_ERR(bcap_dev->alloc_ctx);
828                 goto err_free_ppi;
829         }
830 
831         vfd = &bcap_dev->video_dev;
832         /* initialize field of video device */
833         vfd->release            = video_device_release_empty;
834         vfd->fops               = &bcap_fops;
835         vfd->ioctl_ops          = &bcap_ioctl_ops;
836         vfd->tvnorms            = 0;
837         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
838         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
839 
840         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
841         if (ret) {
842                 v4l2_err(pdev->dev.driver,
843                                 "Unable to register v4l2 device\n");
844                 goto err_cleanup_ctx;
845         }
846         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
847 
848         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
849         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
850         if (ret) {
851                 v4l2_err(&bcap_dev->v4l2_dev,
852                                 "Unable to init control handler\n");
853                 goto err_unreg_v4l2;
854         }
855 
856         spin_lock_init(&bcap_dev->lock);
857         /* initialize queue */
858         q = &bcap_dev->buffer_queue;
859         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
860         q->io_modes = VB2_MMAP | VB2_DMABUF;
861         q->drv_priv = bcap_dev;
862         q->buf_struct_size = sizeof(struct bcap_buffer);
863         q->ops = &bcap_video_qops;
864         q->mem_ops = &vb2_dma_contig_memops;
865         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
866         q->lock = &bcap_dev->mutex;
867         q->min_buffers_needed = 1;
868 
869         ret = vb2_queue_init(q);
870         if (ret)
871                 goto err_free_handler;
872 
873         mutex_init(&bcap_dev->mutex);
874         init_completion(&bcap_dev->comp);
875 
876         /* init video dma queues */
877         INIT_LIST_HEAD(&bcap_dev->dma_queue);
878 
879         vfd->lock = &bcap_dev->mutex;
880         vfd->queue = q;
881 
882         /* register video device */
883         ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
884         if (ret) {
885                 v4l2_err(&bcap_dev->v4l2_dev,
886                                 "Unable to register video device\n");
887                 goto err_free_handler;
888         }
889         video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
890         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
891                         video_device_node_name(vfd));
892 
893         /* load up the subdevice */
894         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
895         if (!i2c_adap) {
896                 v4l2_err(&bcap_dev->v4l2_dev,
897                                 "Unable to find i2c adapter\n");
898                 ret = -ENODEV;
899                 goto err_unreg_vdev;
900 
901         }
902         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
903                                                  i2c_adap,
904                                                  &config->board_info,
905                                                  NULL);
906         if (bcap_dev->sd) {
907                 int i;
908 
909                 /* update tvnorms from the sub devices */
910                 for (i = 0; i < config->num_inputs; i++)
911                         vfd->tvnorms |= config->inputs[i].std;
912         } else {
913                 v4l2_err(&bcap_dev->v4l2_dev,
914                                 "Unable to register sub device\n");
915                 ret = -ENODEV;
916                 goto err_unreg_vdev;
917         }
918 
919         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
920 
921         /*
922          * explicitly set input, otherwise some boards
923          * may not work at the state as we expected
924          */
925         route = &config->routes[0];
926         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
927                                 route->input, route->output, 0);
928         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
929                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
930                 goto err_unreg_vdev;
931         }
932         bcap_dev->cur_input = 0;
933         /* if this route has specific config, update ppi control */
934         if (route->ppi_control)
935                 config->ppi_control = route->ppi_control;
936 
937         /* now we can probe the default state */
938         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
939                 v4l2_std_id std;
940                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
941                 if (ret) {
942                         v4l2_err(&bcap_dev->v4l2_dev,
943                                         "Unable to get std\n");
944                         goto err_unreg_vdev;
945                 }
946                 bcap_dev->std = std;
947         }
948         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
949                 struct v4l2_dv_timings dv_timings;
950                 ret = v4l2_subdev_call(bcap_dev->sd, video,
951                                 g_dv_timings, &dv_timings);
952                 if (ret) {
953                         v4l2_err(&bcap_dev->v4l2_dev,
954                                         "Unable to get dv timings\n");
955                         goto err_unreg_vdev;
956                 }
957                 bcap_dev->dv_timings = dv_timings;
958         }
959         ret = bcap_init_sensor_formats(bcap_dev);
960         if (ret) {
961                 v4l2_err(&bcap_dev->v4l2_dev,
962                                 "Unable to create sensor formats table\n");
963                 goto err_unreg_vdev;
964         }
965         return 0;
966 err_unreg_vdev:
967         video_unregister_device(&bcap_dev->video_dev);
968 err_free_handler:
969         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
970 err_unreg_v4l2:
971         v4l2_device_unregister(&bcap_dev->v4l2_dev);
972 err_cleanup_ctx:
973         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
974 err_free_ppi:
975         ppi_delete_instance(bcap_dev->ppi);
976 err_free_dev:
977         kfree(bcap_dev);
978         return ret;
979 }
980 
981 static int bcap_remove(struct platform_device *pdev)
982 {
983         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
984         struct bcap_device *bcap_dev = container_of(v4l2_dev,
985                                                 struct bcap_device, v4l2_dev);
986 
987         bcap_free_sensor_formats(bcap_dev);
988         video_unregister_device(&bcap_dev->video_dev);
989         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
990         v4l2_device_unregister(v4l2_dev);
991         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
992         ppi_delete_instance(bcap_dev->ppi);
993         kfree(bcap_dev);
994         return 0;
995 }
996 
997 static struct platform_driver bcap_driver = {
998         .driver = {
999                 .name  = CAPTURE_DRV_NAME,
1000         },
1001         .probe = bcap_probe,
1002         .remove = bcap_remove,
1003 };
1004 module_platform_driver(bcap_driver);
1005 
1006 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1007 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1008 MODULE_LICENSE("GPL v2");
1009 

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