Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

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 #define BCAP_MIN_NUM_BUF        2
 48 
 49 struct bcap_format {
 50         char *desc;
 51         u32 pixelformat;
 52         enum v4l2_mbus_pixelcode mbus_code;
 53         int bpp; /* bits per pixel */
 54         int dlen; /* data length for ppi in bits */
 55 };
 56 
 57 struct bcap_buffer {
 58         struct vb2_buffer vb;
 59         struct list_head list;
 60 };
 61 
 62 struct bcap_device {
 63         /* capture device instance */
 64         struct v4l2_device v4l2_dev;
 65         /* v4l2 control handler */
 66         struct v4l2_ctrl_handler ctrl_handler;
 67         /* device node data */
 68         struct video_device *video_dev;
 69         /* sub device instance */
 70         struct v4l2_subdev *sd;
 71         /* capture config */
 72         struct bfin_capture_config *cfg;
 73         /* ppi interface */
 74         struct ppi_if *ppi;
 75         /* current input */
 76         unsigned int cur_input;
 77         /* current selected standard */
 78         v4l2_std_id std;
 79         /* current selected dv_timings */
 80         struct v4l2_dv_timings dv_timings;
 81         /* used to store pixel format */
 82         struct v4l2_pix_format fmt;
 83         /* bits per pixel*/
 84         int bpp;
 85         /* data length for ppi in bits */
 86         int dlen;
 87         /* used to store sensor supported format */
 88         struct bcap_format *sensor_formats;
 89         /* number of sensor formats array */
 90         int num_sensor_formats;
 91         /* pointing to current video buffer */
 92         struct bcap_buffer *cur_frm;
 93         /* buffer queue used in videobuf2 */
 94         struct vb2_queue buffer_queue;
 95         /* allocator-specific contexts for each plane */
 96         struct vb2_alloc_ctx *alloc_ctx;
 97         /* queue of filled frames */
 98         struct list_head dma_queue;
 99         /* used in videobuf2 callback */
100         spinlock_t lock;
101         /* used to access capture device */
102         struct mutex mutex;
103         /* used to wait ppi to complete one transfer */
104         struct completion comp;
105         /* prepare to stop */
106         bool stop;
107 };
108 
109 struct bcap_fh {
110         struct v4l2_fh fh;
111         /* indicates whether this file handle is doing IO */
112         bool io_allowed;
113 };
114 
115 static const struct bcap_format bcap_formats[] = {
116         {
117                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
118                 .pixelformat = V4L2_PIX_FMT_UYVY,
119                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_2X8,
120                 .bpp         = 16,
121                 .dlen        = 8,
122         },
123         {
124                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
125                 .pixelformat = V4L2_PIX_FMT_YUYV,
126                 .mbus_code   = V4L2_MBUS_FMT_YUYV8_2X8,
127                 .bpp         = 16,
128                 .dlen        = 8,
129         },
130         {
131                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
132                 .pixelformat = V4L2_PIX_FMT_UYVY,
133                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_1X16,
134                 .bpp         = 16,
135                 .dlen        = 16,
136         },
137         {
138                 .desc        = "RGB 565",
139                 .pixelformat = V4L2_PIX_FMT_RGB565,
140                 .mbus_code   = V4L2_MBUS_FMT_RGB565_2X8_LE,
141                 .bpp         = 16,
142                 .dlen        = 8,
143         },
144         {
145                 .desc        = "RGB 444",
146                 .pixelformat = V4L2_PIX_FMT_RGB444,
147                 .mbus_code   = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
148                 .bpp         = 16,
149                 .dlen        = 8,
150         },
151 
152 };
153 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
154 
155 static irqreturn_t bcap_isr(int irq, void *dev_id);
156 
157 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
158 {
159         return container_of(vb, struct bcap_buffer, vb);
160 }
161 
162 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
163 {
164         enum v4l2_mbus_pixelcode code;
165         struct bcap_format *sf;
166         unsigned int num_formats = 0;
167         int i, j;
168 
169         while (!v4l2_subdev_call(bcap_dev->sd, video,
170                                 enum_mbus_fmt, num_formats, &code))
171                 num_formats++;
172         if (!num_formats)
173                 return -ENXIO;
174 
175         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
176         if (!sf)
177                 return -ENOMEM;
178 
179         for (i = 0; i < num_formats; i++) {
180                 v4l2_subdev_call(bcap_dev->sd, video,
181                                 enum_mbus_fmt, i, &code);
182                 for (j = 0; j < BCAP_MAX_FMTS; j++)
183                         if (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_open(struct file *file)
205 {
206         struct bcap_device *bcap_dev = video_drvdata(file);
207         struct video_device *vfd = bcap_dev->video_dev;
208         struct bcap_fh *bcap_fh;
209 
210         if (!bcap_dev->sd) {
211                 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
212                 return -ENODEV;
213         }
214 
215         bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
216         if (!bcap_fh) {
217                 v4l2_err(&bcap_dev->v4l2_dev,
218                          "unable to allocate memory for file handle object\n");
219                 return -ENOMEM;
220         }
221 
222         v4l2_fh_init(&bcap_fh->fh, vfd);
223 
224         /* store pointer to v4l2_fh in private_data member of file */
225         file->private_data = &bcap_fh->fh;
226         v4l2_fh_add(&bcap_fh->fh);
227         bcap_fh->io_allowed = false;
228         return 0;
229 }
230 
231 static int bcap_release(struct file *file)
232 {
233         struct bcap_device *bcap_dev = video_drvdata(file);
234         struct v4l2_fh *fh = file->private_data;
235         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
236 
237         /* if this instance is doing IO */
238         if (bcap_fh->io_allowed)
239                 vb2_queue_release(&bcap_dev->buffer_queue);
240 
241         file->private_data = NULL;
242         v4l2_fh_del(&bcap_fh->fh);
243         v4l2_fh_exit(&bcap_fh->fh);
244         kfree(bcap_fh);
245         return 0;
246 }
247 
248 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
249 {
250         struct bcap_device *bcap_dev = video_drvdata(file);
251         int ret;
252 
253         if (mutex_lock_interruptible(&bcap_dev->mutex))
254                 return -ERESTARTSYS;
255         ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
256         mutex_unlock(&bcap_dev->mutex);
257         return ret;
258 }
259 
260 #ifndef CONFIG_MMU
261 static unsigned long bcap_get_unmapped_area(struct file *file,
262                                             unsigned long addr,
263                                             unsigned long len,
264                                             unsigned long pgoff,
265                                             unsigned long flags)
266 {
267         struct bcap_device *bcap_dev = video_drvdata(file);
268 
269         return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
270                                      addr,
271                                      len,
272                                      pgoff,
273                                      flags);
274 }
275 #endif
276 
277 static unsigned int bcap_poll(struct file *file, poll_table *wait)
278 {
279         struct bcap_device *bcap_dev = video_drvdata(file);
280         unsigned int res;
281 
282         mutex_lock(&bcap_dev->mutex);
283         res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
284         mutex_unlock(&bcap_dev->mutex);
285         return res;
286 }
287 
288 static int bcap_queue_setup(struct vb2_queue *vq,
289                                 const struct v4l2_format *fmt,
290                                 unsigned int *nbuffers, unsigned int *nplanes,
291                                 unsigned int sizes[], void *alloc_ctxs[])
292 {
293         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
294 
295         if (*nbuffers < BCAP_MIN_NUM_BUF)
296                 *nbuffers = BCAP_MIN_NUM_BUF;
297 
298         *nplanes = 1;
299         sizes[0] = bcap_dev->fmt.sizeimage;
300         alloc_ctxs[0] = bcap_dev->alloc_ctx;
301 
302         return 0;
303 }
304 
305 static int bcap_buffer_init(struct vb2_buffer *vb)
306 {
307         struct bcap_buffer *buf = to_bcap_vb(vb);
308 
309         INIT_LIST_HEAD(&buf->list);
310         return 0;
311 }
312 
313 static int bcap_buffer_prepare(struct vb2_buffer *vb)
314 {
315         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
316         struct bcap_buffer *buf = to_bcap_vb(vb);
317         unsigned long size;
318 
319         size = bcap_dev->fmt.sizeimage;
320         if (vb2_plane_size(vb, 0) < size) {
321                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
322                                 vb2_plane_size(vb, 0), size);
323                 return -EINVAL;
324         }
325         vb2_set_plane_payload(&buf->vb, 0, size);
326 
327         return 0;
328 }
329 
330 static void bcap_buffer_queue(struct vb2_buffer *vb)
331 {
332         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
333         struct bcap_buffer *buf = to_bcap_vb(vb);
334         unsigned long flags;
335 
336         spin_lock_irqsave(&bcap_dev->lock, flags);
337         list_add_tail(&buf->list, &bcap_dev->dma_queue);
338         spin_unlock_irqrestore(&bcap_dev->lock, flags);
339 }
340 
341 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
342 {
343         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
344         struct bcap_buffer *buf = to_bcap_vb(vb);
345         unsigned long flags;
346 
347         spin_lock_irqsave(&bcap_dev->lock, flags);
348         list_del_init(&buf->list);
349         spin_unlock_irqrestore(&bcap_dev->lock, flags);
350 }
351 
352 static void bcap_lock(struct vb2_queue *vq)
353 {
354         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
355         mutex_lock(&bcap_dev->mutex);
356 }
357 
358 static void bcap_unlock(struct vb2_queue *vq)
359 {
360         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
361         mutex_unlock(&bcap_dev->mutex);
362 }
363 
364 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
365 {
366         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
367         struct ppi_if *ppi = bcap_dev->ppi;
368         struct ppi_params params;
369         int ret;
370 
371         /* enable streamon on the sub device */
372         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
373         if (ret && (ret != -ENOIOCTLCMD)) {
374                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
375                 return ret;
376         }
377 
378         /* set ppi params */
379         params.width = bcap_dev->fmt.width;
380         params.height = bcap_dev->fmt.height;
381         params.bpp = bcap_dev->bpp;
382         params.dlen = bcap_dev->dlen;
383         params.ppi_control = bcap_dev->cfg->ppi_control;
384         params.int_mask = bcap_dev->cfg->int_mask;
385         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
386                         & V4L2_IN_CAP_DV_TIMINGS) {
387                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
388 
389                 params.hdelay = bt->hsync + bt->hbackporch;
390                 params.vdelay = bt->vsync + bt->vbackporch;
391                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
392                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
393         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
394                         & V4L2_IN_CAP_STD) {
395                 params.hdelay = 0;
396                 params.vdelay = 0;
397                 if (bcap_dev->std & V4L2_STD_525_60) {
398                         params.line = 858;
399                         params.frame = 525;
400                 } else {
401                         params.line = 864;
402                         params.frame = 625;
403                 }
404         } else {
405                 params.hdelay = 0;
406                 params.vdelay = 0;
407                 params.line = params.width + bcap_dev->cfg->blank_pixels;
408                 params.frame = params.height;
409         }
410         ret = ppi->ops->set_params(ppi, &params);
411         if (ret < 0) {
412                 v4l2_err(&bcap_dev->v4l2_dev,
413                                 "Error in setting ppi params\n");
414                 return ret;
415         }
416 
417         /* attach ppi DMA irq handler */
418         ret = ppi->ops->attach_irq(ppi, bcap_isr);
419         if (ret < 0) {
420                 v4l2_err(&bcap_dev->v4l2_dev,
421                                 "Error in attaching interrupt handler\n");
422                 return ret;
423         }
424 
425         reinit_completion(&bcap_dev->comp);
426         bcap_dev->stop = false;
427         return 0;
428 }
429 
430 static void bcap_stop_streaming(struct vb2_queue *vq)
431 {
432         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
433         struct ppi_if *ppi = bcap_dev->ppi;
434         int ret;
435 
436         bcap_dev->stop = true;
437         wait_for_completion(&bcap_dev->comp);
438         ppi->ops->stop(ppi);
439         ppi->ops->detach_irq(ppi);
440         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
441         if (ret && (ret != -ENOIOCTLCMD))
442                 v4l2_err(&bcap_dev->v4l2_dev,
443                                 "stream off failed in subdev\n");
444 
445         /* release all active buffers */
446         while (!list_empty(&bcap_dev->dma_queue)) {
447                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
448                                                 struct bcap_buffer, list);
449                 list_del_init(&bcap_dev->cur_frm->list);
450                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
451         }
452 }
453 
454 static struct vb2_ops bcap_video_qops = {
455         .queue_setup            = bcap_queue_setup,
456         .buf_init               = bcap_buffer_init,
457         .buf_prepare            = bcap_buffer_prepare,
458         .buf_cleanup            = bcap_buffer_cleanup,
459         .buf_queue              = bcap_buffer_queue,
460         .wait_prepare           = bcap_unlock,
461         .wait_finish            = bcap_lock,
462         .start_streaming        = bcap_start_streaming,
463         .stop_streaming         = bcap_stop_streaming,
464 };
465 
466 static int bcap_reqbufs(struct file *file, void *priv,
467                         struct v4l2_requestbuffers *req_buf)
468 {
469         struct bcap_device *bcap_dev = video_drvdata(file);
470         struct vb2_queue *vq = &bcap_dev->buffer_queue;
471         struct v4l2_fh *fh = file->private_data;
472         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
473 
474         if (vb2_is_busy(vq))
475                 return -EBUSY;
476 
477         bcap_fh->io_allowed = true;
478 
479         return vb2_reqbufs(vq, req_buf);
480 }
481 
482 static int bcap_querybuf(struct file *file, void *priv,
483                                 struct v4l2_buffer *buf)
484 {
485         struct bcap_device *bcap_dev = video_drvdata(file);
486 
487         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
488 }
489 
490 static int bcap_qbuf(struct file *file, void *priv,
491                         struct v4l2_buffer *buf)
492 {
493         struct bcap_device *bcap_dev = video_drvdata(file);
494         struct v4l2_fh *fh = file->private_data;
495         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
496 
497         if (!bcap_fh->io_allowed)
498                 return -EBUSY;
499 
500         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
501 }
502 
503 static int bcap_dqbuf(struct file *file, void *priv,
504                         struct v4l2_buffer *buf)
505 {
506         struct bcap_device *bcap_dev = video_drvdata(file);
507         struct v4l2_fh *fh = file->private_data;
508         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
509 
510         if (!bcap_fh->io_allowed)
511                 return -EBUSY;
512 
513         return vb2_dqbuf(&bcap_dev->buffer_queue,
514                                 buf, file->f_flags & O_NONBLOCK);
515 }
516 
517 static irqreturn_t bcap_isr(int irq, void *dev_id)
518 {
519         struct ppi_if *ppi = dev_id;
520         struct bcap_device *bcap_dev = ppi->priv;
521         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
522         dma_addr_t addr;
523 
524         spin_lock(&bcap_dev->lock);
525 
526         if (!list_empty(&bcap_dev->dma_queue)) {
527                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
528                 if (ppi->err) {
529                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
530                         ppi->err = false;
531                 } else {
532                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
533                 }
534                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
535                                 struct bcap_buffer, list);
536                 list_del_init(&bcap_dev->cur_frm->list);
537         } else {
538                 /* clear error flag, we will get a new frame */
539                 if (ppi->err)
540                         ppi->err = false;
541         }
542 
543         ppi->ops->stop(ppi);
544 
545         if (bcap_dev->stop) {
546                 complete(&bcap_dev->comp);
547         } else {
548                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
549                 ppi->ops->update_addr(ppi, (unsigned long)addr);
550                 ppi->ops->start(ppi);
551         }
552 
553         spin_unlock(&bcap_dev->lock);
554 
555         return IRQ_HANDLED;
556 }
557 
558 static int bcap_streamon(struct file *file, void *priv,
559                                 enum v4l2_buf_type buf_type)
560 {
561         struct bcap_device *bcap_dev = video_drvdata(file);
562         struct bcap_fh *fh = file->private_data;
563         struct ppi_if *ppi = bcap_dev->ppi;
564         dma_addr_t addr;
565         int ret;
566 
567         if (!fh->io_allowed)
568                 return -EBUSY;
569 
570         /* call streamon to start streaming in videobuf */
571         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
572         if (ret)
573                 return ret;
574 
575         /* if dma queue is empty, return error */
576         if (list_empty(&bcap_dev->dma_queue)) {
577                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
578                 ret = -EINVAL;
579                 goto err;
580         }
581 
582         /* get the next frame from the dma queue */
583         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
584                                         struct bcap_buffer, list);
585         /* remove buffer from the dma queue */
586         list_del_init(&bcap_dev->cur_frm->list);
587         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
588         /* update DMA address */
589         ppi->ops->update_addr(ppi, (unsigned long)addr);
590         /* enable ppi */
591         ppi->ops->start(ppi);
592 
593         return 0;
594 err:
595         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
596         return ret;
597 }
598 
599 static int bcap_streamoff(struct file *file, void *priv,
600                                 enum v4l2_buf_type buf_type)
601 {
602         struct bcap_device *bcap_dev = video_drvdata(file);
603         struct bcap_fh *fh = file->private_data;
604 
605         if (!fh->io_allowed)
606                 return -EBUSY;
607 
608         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
609 }
610 
611 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
612 {
613         struct bcap_device *bcap_dev = video_drvdata(file);
614 
615         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
616 }
617 
618 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
619 {
620         struct bcap_device *bcap_dev = video_drvdata(file);
621 
622         *std = bcap_dev->std;
623         return 0;
624 }
625 
626 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
627 {
628         struct bcap_device *bcap_dev = video_drvdata(file);
629         int ret;
630 
631         if (vb2_is_busy(&bcap_dev->buffer_queue))
632                 return -EBUSY;
633 
634         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
635         if (ret < 0)
636                 return ret;
637 
638         bcap_dev->std = std;
639         return 0;
640 }
641 
642 static int bcap_enum_dv_timings(struct file *file, void *priv,
643                                 struct v4l2_enum_dv_timings *timings)
644 {
645         struct bcap_device *bcap_dev = video_drvdata(file);
646 
647         timings->pad = 0;
648 
649         return v4l2_subdev_call(bcap_dev->sd, pad,
650                         enum_dv_timings, timings);
651 }
652 
653 static int bcap_query_dv_timings(struct file *file, void *priv,
654                                 struct v4l2_dv_timings *timings)
655 {
656         struct bcap_device *bcap_dev = video_drvdata(file);
657 
658         return v4l2_subdev_call(bcap_dev->sd, video,
659                                 query_dv_timings, timings);
660 }
661 
662 static int bcap_g_dv_timings(struct file *file, void *priv,
663                                 struct v4l2_dv_timings *timings)
664 {
665         struct bcap_device *bcap_dev = video_drvdata(file);
666 
667         *timings = bcap_dev->dv_timings;
668         return 0;
669 }
670 
671 static int bcap_s_dv_timings(struct file *file, void *priv,
672                                 struct v4l2_dv_timings *timings)
673 {
674         struct bcap_device *bcap_dev = video_drvdata(file);
675         int ret;
676         if (vb2_is_busy(&bcap_dev->buffer_queue))
677                 return -EBUSY;
678 
679         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
680         if (ret < 0)
681                 return ret;
682 
683         bcap_dev->dv_timings = *timings;
684         return 0;
685 }
686 
687 static int bcap_enum_input(struct file *file, void *priv,
688                                 struct v4l2_input *input)
689 {
690         struct bcap_device *bcap_dev = video_drvdata(file);
691         struct bfin_capture_config *config = bcap_dev->cfg;
692         int ret;
693         u32 status;
694 
695         if (input->index >= config->num_inputs)
696                 return -EINVAL;
697 
698         *input = config->inputs[input->index];
699         /* get input status */
700         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
701         if (!ret)
702                 input->status = status;
703         return 0;
704 }
705 
706 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
707 {
708         struct bcap_device *bcap_dev = video_drvdata(file);
709 
710         *index = bcap_dev->cur_input;
711         return 0;
712 }
713 
714 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
715 {
716         struct bcap_device *bcap_dev = video_drvdata(file);
717         struct bfin_capture_config *config = bcap_dev->cfg;
718         struct bcap_route *route;
719         int ret;
720 
721         if (vb2_is_busy(&bcap_dev->buffer_queue))
722                 return -EBUSY;
723 
724         if (index >= config->num_inputs)
725                 return -EINVAL;
726 
727         route = &config->routes[index];
728         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
729                                 route->input, route->output, 0);
730         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
731                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
732                 return ret;
733         }
734         bcap_dev->cur_input = index;
735         /* if this route has specific config, update ppi control */
736         if (route->ppi_control)
737                 config->ppi_control = route->ppi_control;
738         return 0;
739 }
740 
741 static int bcap_try_format(struct bcap_device *bcap,
742                                 struct v4l2_pix_format *pixfmt,
743                                 struct bcap_format *bcap_fmt)
744 {
745         struct bcap_format *sf = bcap->sensor_formats;
746         struct bcap_format *fmt = NULL;
747         struct v4l2_mbus_framefmt mbus_fmt;
748         int ret, i;
749 
750         for (i = 0; i < bcap->num_sensor_formats; i++) {
751                 fmt = &sf[i];
752                 if (pixfmt->pixelformat == fmt->pixelformat)
753                         break;
754         }
755         if (i == bcap->num_sensor_formats)
756                 fmt = &sf[0];
757 
758         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
759         ret = v4l2_subdev_call(bcap->sd, video,
760                                 try_mbus_fmt, &mbus_fmt);
761         if (ret < 0)
762                 return ret;
763         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
764         if (bcap_fmt) {
765                 for (i = 0; i < bcap->num_sensor_formats; i++) {
766                         fmt = &sf[i];
767                         if (mbus_fmt.code == fmt->mbus_code)
768                                 break;
769                 }
770                 *bcap_fmt = *fmt;
771         }
772         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
773         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
774         return 0;
775 }
776 
777 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
778                                         struct v4l2_fmtdesc *fmt)
779 {
780         struct bcap_device *bcap_dev = video_drvdata(file);
781         struct bcap_format *sf = bcap_dev->sensor_formats;
782 
783         if (fmt->index >= bcap_dev->num_sensor_formats)
784                 return -EINVAL;
785 
786         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
787         strlcpy(fmt->description,
788                 sf[fmt->index].desc,
789                 sizeof(fmt->description));
790         fmt->pixelformat = sf[fmt->index].pixelformat;
791         return 0;
792 }
793 
794 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
795                                         struct v4l2_format *fmt)
796 {
797         struct bcap_device *bcap_dev = video_drvdata(file);
798         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
799 
800         return bcap_try_format(bcap_dev, pixfmt, NULL);
801 }
802 
803 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
804                                 struct v4l2_format *fmt)
805 {
806         struct bcap_device *bcap_dev = video_drvdata(file);
807 
808         fmt->fmt.pix = bcap_dev->fmt;
809         return 0;
810 }
811 
812 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
813                                 struct v4l2_format *fmt)
814 {
815         struct bcap_device *bcap_dev = video_drvdata(file);
816         struct v4l2_mbus_framefmt mbus_fmt;
817         struct bcap_format bcap_fmt;
818         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
819         int ret;
820 
821         if (vb2_is_busy(&bcap_dev->buffer_queue))
822                 return -EBUSY;
823 
824         /* see if format works */
825         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
826         if (ret < 0)
827                 return ret;
828 
829         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
830         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
831         if (ret < 0)
832                 return ret;
833         bcap_dev->fmt = *pixfmt;
834         bcap_dev->bpp = bcap_fmt.bpp;
835         bcap_dev->dlen = bcap_fmt.dlen;
836         return 0;
837 }
838 
839 static int bcap_querycap(struct file *file, void  *priv,
840                                 struct v4l2_capability *cap)
841 {
842         struct bcap_device *bcap_dev = video_drvdata(file);
843 
844         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
845         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
846         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
847         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
848         return 0;
849 }
850 
851 static int bcap_g_parm(struct file *file, void *fh,
852                                 struct v4l2_streamparm *a)
853 {
854         struct bcap_device *bcap_dev = video_drvdata(file);
855 
856         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
857                 return -EINVAL;
858         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
859 }
860 
861 static int bcap_s_parm(struct file *file, void *fh,
862                                 struct v4l2_streamparm *a)
863 {
864         struct bcap_device *bcap_dev = video_drvdata(file);
865 
866         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
867                 return -EINVAL;
868         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
869 }
870 
871 static int bcap_log_status(struct file *file, void *priv)
872 {
873         struct bcap_device *bcap_dev = video_drvdata(file);
874         /* status for sub devices */
875         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
876         return 0;
877 }
878 
879 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
880         .vidioc_querycap         = bcap_querycap,
881         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
882         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
883         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
884         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
885         .vidioc_enum_input       = bcap_enum_input,
886         .vidioc_g_input          = bcap_g_input,
887         .vidioc_s_input          = bcap_s_input,
888         .vidioc_querystd         = bcap_querystd,
889         .vidioc_s_std            = bcap_s_std,
890         .vidioc_g_std            = bcap_g_std,
891         .vidioc_s_dv_timings     = bcap_s_dv_timings,
892         .vidioc_g_dv_timings     = bcap_g_dv_timings,
893         .vidioc_query_dv_timings = bcap_query_dv_timings,
894         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
895         .vidioc_reqbufs          = bcap_reqbufs,
896         .vidioc_querybuf         = bcap_querybuf,
897         .vidioc_qbuf             = bcap_qbuf,
898         .vidioc_dqbuf            = bcap_dqbuf,
899         .vidioc_streamon         = bcap_streamon,
900         .vidioc_streamoff        = bcap_streamoff,
901         .vidioc_g_parm           = bcap_g_parm,
902         .vidioc_s_parm           = bcap_s_parm,
903         .vidioc_log_status       = bcap_log_status,
904 };
905 
906 static struct v4l2_file_operations bcap_fops = {
907         .owner = THIS_MODULE,
908         .open = bcap_open,
909         .release = bcap_release,
910         .unlocked_ioctl = video_ioctl2,
911         .mmap = bcap_mmap,
912 #ifndef CONFIG_MMU
913         .get_unmapped_area = bcap_get_unmapped_area,
914 #endif
915         .poll = bcap_poll
916 };
917 
918 static int bcap_probe(struct platform_device *pdev)
919 {
920         struct bcap_device *bcap_dev;
921         struct video_device *vfd;
922         struct i2c_adapter *i2c_adap;
923         struct bfin_capture_config *config;
924         struct vb2_queue *q;
925         struct bcap_route *route;
926         int ret;
927 
928         config = pdev->dev.platform_data;
929         if (!config || !config->num_inputs) {
930                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
931                 return -ENODEV;
932         }
933 
934         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
935         if (!bcap_dev) {
936                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
937                 return -ENOMEM;
938         }
939 
940         bcap_dev->cfg = config;
941 
942         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
943         if (!bcap_dev->ppi) {
944                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
945                 ret = -ENODEV;
946                 goto err_free_dev;
947         }
948         bcap_dev->ppi->priv = bcap_dev;
949 
950         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
951         if (IS_ERR(bcap_dev->alloc_ctx)) {
952                 ret = PTR_ERR(bcap_dev->alloc_ctx);
953                 goto err_free_ppi;
954         }
955 
956         vfd = video_device_alloc();
957         if (!vfd) {
958                 ret = -ENOMEM;
959                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
960                 goto err_cleanup_ctx;
961         }
962 
963         /* initialize field of video device */
964         vfd->release            = video_device_release;
965         vfd->fops               = &bcap_fops;
966         vfd->ioctl_ops          = &bcap_ioctl_ops;
967         vfd->tvnorms            = 0;
968         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
969         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
970         bcap_dev->video_dev     = vfd;
971 
972         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
973         if (ret) {
974                 v4l2_err(pdev->dev.driver,
975                                 "Unable to register v4l2 device\n");
976                 goto err_release_vdev;
977         }
978         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
979 
980         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
981         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
982         if (ret) {
983                 v4l2_err(&bcap_dev->v4l2_dev,
984                                 "Unable to init control handler\n");
985                 goto err_unreg_v4l2;
986         }
987 
988         spin_lock_init(&bcap_dev->lock);
989         /* initialize queue */
990         q = &bcap_dev->buffer_queue;
991         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
992         q->io_modes = VB2_MMAP;
993         q->drv_priv = bcap_dev;
994         q->buf_struct_size = sizeof(struct bcap_buffer);
995         q->ops = &bcap_video_qops;
996         q->mem_ops = &vb2_dma_contig_memops;
997         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
998 
999         ret = vb2_queue_init(q);
1000         if (ret)
1001                 goto err_free_handler;
1002 
1003         mutex_init(&bcap_dev->mutex);
1004         init_completion(&bcap_dev->comp);
1005 
1006         /* init video dma queues */
1007         INIT_LIST_HEAD(&bcap_dev->dma_queue);
1008 
1009         vfd->lock = &bcap_dev->mutex;
1010 
1011         /* register video device */
1012         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1013         if (ret) {
1014                 v4l2_err(&bcap_dev->v4l2_dev,
1015                                 "Unable to register video device\n");
1016                 goto err_free_handler;
1017         }
1018         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1019         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1020                         video_device_node_name(vfd));
1021 
1022         /* load up the subdevice */
1023         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1024         if (!i2c_adap) {
1025                 v4l2_err(&bcap_dev->v4l2_dev,
1026                                 "Unable to find i2c adapter\n");
1027                 ret = -ENODEV;
1028                 goto err_unreg_vdev;
1029 
1030         }
1031         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1032                                                  i2c_adap,
1033                                                  &config->board_info,
1034                                                  NULL);
1035         if (bcap_dev->sd) {
1036                 int i;
1037 
1038                 /* update tvnorms from the sub devices */
1039                 for (i = 0; i < config->num_inputs; i++)
1040                         vfd->tvnorms |= config->inputs[i].std;
1041         } else {
1042                 v4l2_err(&bcap_dev->v4l2_dev,
1043                                 "Unable to register sub device\n");
1044                 ret = -ENODEV;
1045                 goto err_unreg_vdev;
1046         }
1047 
1048         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1049 
1050         /*
1051          * explicitly set input, otherwise some boards
1052          * may not work at the state as we expected
1053          */
1054         route = &config->routes[0];
1055         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1056                                 route->input, route->output, 0);
1057         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1058                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1059                 goto err_unreg_vdev;
1060         }
1061         bcap_dev->cur_input = 0;
1062         /* if this route has specific config, update ppi control */
1063         if (route->ppi_control)
1064                 config->ppi_control = route->ppi_control;
1065 
1066         /* now we can probe the default state */
1067         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1068                 v4l2_std_id std;
1069                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
1070                 if (ret) {
1071                         v4l2_err(&bcap_dev->v4l2_dev,
1072                                         "Unable to get std\n");
1073                         goto err_unreg_vdev;
1074                 }
1075                 bcap_dev->std = std;
1076         }
1077         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1078                 struct v4l2_dv_timings dv_timings;
1079                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1080                                 g_dv_timings, &dv_timings);
1081                 if (ret) {
1082                         v4l2_err(&bcap_dev->v4l2_dev,
1083                                         "Unable to get dv timings\n");
1084                         goto err_unreg_vdev;
1085                 }
1086                 bcap_dev->dv_timings = dv_timings;
1087         }
1088         ret = bcap_init_sensor_formats(bcap_dev);
1089         if (ret) {
1090                 v4l2_err(&bcap_dev->v4l2_dev,
1091                                 "Unable to create sensor formats table\n");
1092                 goto err_unreg_vdev;
1093         }
1094         return 0;
1095 err_unreg_vdev:
1096         video_unregister_device(bcap_dev->video_dev);
1097         bcap_dev->video_dev = NULL;
1098 err_free_handler:
1099         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1100 err_unreg_v4l2:
1101         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1102 err_release_vdev:
1103         if (bcap_dev->video_dev)
1104                 video_device_release(bcap_dev->video_dev);
1105 err_cleanup_ctx:
1106         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1107 err_free_ppi:
1108         ppi_delete_instance(bcap_dev->ppi);
1109 err_free_dev:
1110         kfree(bcap_dev);
1111         return ret;
1112 }
1113 
1114 static int bcap_remove(struct platform_device *pdev)
1115 {
1116         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1117         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1118                                                 struct bcap_device, v4l2_dev);
1119 
1120         bcap_free_sensor_formats(bcap_dev);
1121         video_unregister_device(bcap_dev->video_dev);
1122         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1123         v4l2_device_unregister(v4l2_dev);
1124         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1125         ppi_delete_instance(bcap_dev->ppi);
1126         kfree(bcap_dev);
1127         return 0;
1128 }
1129 
1130 static struct platform_driver bcap_driver = {
1131         .driver = {
1132                 .name  = CAPTURE_DRV_NAME,
1133                 .owner = THIS_MODULE,
1134         },
1135         .probe = bcap_probe,
1136         .remove = bcap_remove,
1137 };
1138 module_platform_driver(bcap_driver);
1139 
1140 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1141 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1142 MODULE_LICENSE("GPL v2");
1143 

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