Version:  2.0.40 2.2.26 2.4.37 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 3.18 3.19

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         u32 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   = MEDIA_BUS_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   = MEDIA_BUS_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   = MEDIA_BUS_FMT_UYVY8_1X16,
134                 .bpp         = 16,
135                 .dlen        = 16,
136         },
137         {
138                 .desc        = "RGB 565",
139                 .pixelformat = V4L2_PIX_FMT_RGB565,
140                 .mbus_code   = MEDIA_BUS_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   = MEDIA_BUS_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         u32 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 int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
353 {
354         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
355         struct ppi_if *ppi = bcap_dev->ppi;
356         struct ppi_params params;
357         int ret;
358 
359         /* enable streamon on the sub device */
360         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
361         if (ret && (ret != -ENOIOCTLCMD)) {
362                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
363                 return ret;
364         }
365 
366         /* set ppi params */
367         params.width = bcap_dev->fmt.width;
368         params.height = bcap_dev->fmt.height;
369         params.bpp = bcap_dev->bpp;
370         params.dlen = bcap_dev->dlen;
371         params.ppi_control = bcap_dev->cfg->ppi_control;
372         params.int_mask = bcap_dev->cfg->int_mask;
373         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
374                         & V4L2_IN_CAP_DV_TIMINGS) {
375                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
376 
377                 params.hdelay = bt->hsync + bt->hbackporch;
378                 params.vdelay = bt->vsync + bt->vbackporch;
379                 params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
380                 params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
381         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
382                         & V4L2_IN_CAP_STD) {
383                 params.hdelay = 0;
384                 params.vdelay = 0;
385                 if (bcap_dev->std & V4L2_STD_525_60) {
386                         params.line = 858;
387                         params.frame = 525;
388                 } else {
389                         params.line = 864;
390                         params.frame = 625;
391                 }
392         } else {
393                 params.hdelay = 0;
394                 params.vdelay = 0;
395                 params.line = params.width + bcap_dev->cfg->blank_pixels;
396                 params.frame = params.height;
397         }
398         ret = ppi->ops->set_params(ppi, &params);
399         if (ret < 0) {
400                 v4l2_err(&bcap_dev->v4l2_dev,
401                                 "Error in setting ppi params\n");
402                 return ret;
403         }
404 
405         /* attach ppi DMA irq handler */
406         ret = ppi->ops->attach_irq(ppi, bcap_isr);
407         if (ret < 0) {
408                 v4l2_err(&bcap_dev->v4l2_dev,
409                                 "Error in attaching interrupt handler\n");
410                 return ret;
411         }
412 
413         reinit_completion(&bcap_dev->comp);
414         bcap_dev->stop = false;
415         return 0;
416 }
417 
418 static void bcap_stop_streaming(struct vb2_queue *vq)
419 {
420         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
421         struct ppi_if *ppi = bcap_dev->ppi;
422         int ret;
423 
424         bcap_dev->stop = true;
425         wait_for_completion(&bcap_dev->comp);
426         ppi->ops->stop(ppi);
427         ppi->ops->detach_irq(ppi);
428         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
429         if (ret && (ret != -ENOIOCTLCMD))
430                 v4l2_err(&bcap_dev->v4l2_dev,
431                                 "stream off failed in subdev\n");
432 
433         /* release all active buffers */
434         while (!list_empty(&bcap_dev->dma_queue)) {
435                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
436                                                 struct bcap_buffer, list);
437                 list_del_init(&bcap_dev->cur_frm->list);
438                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
439         }
440 }
441 
442 static struct vb2_ops bcap_video_qops = {
443         .queue_setup            = bcap_queue_setup,
444         .buf_init               = bcap_buffer_init,
445         .buf_prepare            = bcap_buffer_prepare,
446         .buf_cleanup            = bcap_buffer_cleanup,
447         .buf_queue              = bcap_buffer_queue,
448         .wait_prepare           = vb2_ops_wait_prepare,
449         .wait_finish            = vb2_ops_wait_finish,
450         .start_streaming        = bcap_start_streaming,
451         .stop_streaming         = bcap_stop_streaming,
452 };
453 
454 static int bcap_reqbufs(struct file *file, void *priv,
455                         struct v4l2_requestbuffers *req_buf)
456 {
457         struct bcap_device *bcap_dev = video_drvdata(file);
458         struct vb2_queue *vq = &bcap_dev->buffer_queue;
459         struct v4l2_fh *fh = file->private_data;
460         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
461 
462         if (vb2_is_busy(vq))
463                 return -EBUSY;
464 
465         bcap_fh->io_allowed = true;
466 
467         return vb2_reqbufs(vq, req_buf);
468 }
469 
470 static int bcap_querybuf(struct file *file, void *priv,
471                                 struct v4l2_buffer *buf)
472 {
473         struct bcap_device *bcap_dev = video_drvdata(file);
474 
475         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
476 }
477 
478 static int bcap_qbuf(struct file *file, void *priv,
479                         struct v4l2_buffer *buf)
480 {
481         struct bcap_device *bcap_dev = video_drvdata(file);
482         struct v4l2_fh *fh = file->private_data;
483         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
484 
485         if (!bcap_fh->io_allowed)
486                 return -EBUSY;
487 
488         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
489 }
490 
491 static int bcap_dqbuf(struct file *file, void *priv,
492                         struct v4l2_buffer *buf)
493 {
494         struct bcap_device *bcap_dev = video_drvdata(file);
495         struct v4l2_fh *fh = file->private_data;
496         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
497 
498         if (!bcap_fh->io_allowed)
499                 return -EBUSY;
500 
501         return vb2_dqbuf(&bcap_dev->buffer_queue,
502                                 buf, file->f_flags & O_NONBLOCK);
503 }
504 
505 static irqreturn_t bcap_isr(int irq, void *dev_id)
506 {
507         struct ppi_if *ppi = dev_id;
508         struct bcap_device *bcap_dev = ppi->priv;
509         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
510         dma_addr_t addr;
511 
512         spin_lock(&bcap_dev->lock);
513 
514         if (!list_empty(&bcap_dev->dma_queue)) {
515                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
516                 if (ppi->err) {
517                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
518                         ppi->err = false;
519                 } else {
520                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
521                 }
522                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
523                                 struct bcap_buffer, list);
524                 list_del_init(&bcap_dev->cur_frm->list);
525         } else {
526                 /* clear error flag, we will get a new frame */
527                 if (ppi->err)
528                         ppi->err = false;
529         }
530 
531         ppi->ops->stop(ppi);
532 
533         if (bcap_dev->stop) {
534                 complete(&bcap_dev->comp);
535         } else {
536                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
537                 ppi->ops->update_addr(ppi, (unsigned long)addr);
538                 ppi->ops->start(ppi);
539         }
540 
541         spin_unlock(&bcap_dev->lock);
542 
543         return IRQ_HANDLED;
544 }
545 
546 static int bcap_streamon(struct file *file, void *priv,
547                                 enum v4l2_buf_type buf_type)
548 {
549         struct bcap_device *bcap_dev = video_drvdata(file);
550         struct bcap_fh *fh = file->private_data;
551         struct ppi_if *ppi = bcap_dev->ppi;
552         dma_addr_t addr;
553         int ret;
554 
555         if (!fh->io_allowed)
556                 return -EBUSY;
557 
558         /* call streamon to start streaming in videobuf */
559         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
560         if (ret)
561                 return ret;
562 
563         /* if dma queue is empty, return error */
564         if (list_empty(&bcap_dev->dma_queue)) {
565                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
566                 ret = -EINVAL;
567                 goto err;
568         }
569 
570         /* get the next frame from the dma queue */
571         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
572                                         struct bcap_buffer, list);
573         /* remove buffer from the dma queue */
574         list_del_init(&bcap_dev->cur_frm->list);
575         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
576         /* update DMA address */
577         ppi->ops->update_addr(ppi, (unsigned long)addr);
578         /* enable ppi */
579         ppi->ops->start(ppi);
580 
581         return 0;
582 err:
583         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
584         return ret;
585 }
586 
587 static int bcap_streamoff(struct file *file, void *priv,
588                                 enum v4l2_buf_type buf_type)
589 {
590         struct bcap_device *bcap_dev = video_drvdata(file);
591         struct bcap_fh *fh = file->private_data;
592 
593         if (!fh->io_allowed)
594                 return -EBUSY;
595 
596         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
597 }
598 
599 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
600 {
601         struct bcap_device *bcap_dev = video_drvdata(file);
602 
603         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
604 }
605 
606 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
607 {
608         struct bcap_device *bcap_dev = video_drvdata(file);
609 
610         *std = bcap_dev->std;
611         return 0;
612 }
613 
614 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
615 {
616         struct bcap_device *bcap_dev = video_drvdata(file);
617         int ret;
618 
619         if (vb2_is_busy(&bcap_dev->buffer_queue))
620                 return -EBUSY;
621 
622         ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
623         if (ret < 0)
624                 return ret;
625 
626         bcap_dev->std = std;
627         return 0;
628 }
629 
630 static int bcap_enum_dv_timings(struct file *file, void *priv,
631                                 struct v4l2_enum_dv_timings *timings)
632 {
633         struct bcap_device *bcap_dev = video_drvdata(file);
634 
635         timings->pad = 0;
636 
637         return v4l2_subdev_call(bcap_dev->sd, pad,
638                         enum_dv_timings, timings);
639 }
640 
641 static int bcap_query_dv_timings(struct file *file, void *priv,
642                                 struct v4l2_dv_timings *timings)
643 {
644         struct bcap_device *bcap_dev = video_drvdata(file);
645 
646         return v4l2_subdev_call(bcap_dev->sd, video,
647                                 query_dv_timings, timings);
648 }
649 
650 static int bcap_g_dv_timings(struct file *file, void *priv,
651                                 struct v4l2_dv_timings *timings)
652 {
653         struct bcap_device *bcap_dev = video_drvdata(file);
654 
655         *timings = bcap_dev->dv_timings;
656         return 0;
657 }
658 
659 static int bcap_s_dv_timings(struct file *file, void *priv,
660                                 struct v4l2_dv_timings *timings)
661 {
662         struct bcap_device *bcap_dev = video_drvdata(file);
663         int ret;
664         if (vb2_is_busy(&bcap_dev->buffer_queue))
665                 return -EBUSY;
666 
667         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
668         if (ret < 0)
669                 return ret;
670 
671         bcap_dev->dv_timings = *timings;
672         return 0;
673 }
674 
675 static int bcap_enum_input(struct file *file, void *priv,
676                                 struct v4l2_input *input)
677 {
678         struct bcap_device *bcap_dev = video_drvdata(file);
679         struct bfin_capture_config *config = bcap_dev->cfg;
680         int ret;
681         u32 status;
682 
683         if (input->index >= config->num_inputs)
684                 return -EINVAL;
685 
686         *input = config->inputs[input->index];
687         /* get input status */
688         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
689         if (!ret)
690                 input->status = status;
691         return 0;
692 }
693 
694 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
695 {
696         struct bcap_device *bcap_dev = video_drvdata(file);
697 
698         *index = bcap_dev->cur_input;
699         return 0;
700 }
701 
702 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
703 {
704         struct bcap_device *bcap_dev = video_drvdata(file);
705         struct bfin_capture_config *config = bcap_dev->cfg;
706         struct bcap_route *route;
707         int ret;
708 
709         if (vb2_is_busy(&bcap_dev->buffer_queue))
710                 return -EBUSY;
711 
712         if (index >= config->num_inputs)
713                 return -EINVAL;
714 
715         route = &config->routes[index];
716         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
717                                 route->input, route->output, 0);
718         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
719                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
720                 return ret;
721         }
722         bcap_dev->cur_input = index;
723         /* if this route has specific config, update ppi control */
724         if (route->ppi_control)
725                 config->ppi_control = route->ppi_control;
726         return 0;
727 }
728 
729 static int bcap_try_format(struct bcap_device *bcap,
730                                 struct v4l2_pix_format *pixfmt,
731                                 struct bcap_format *bcap_fmt)
732 {
733         struct bcap_format *sf = bcap->sensor_formats;
734         struct bcap_format *fmt = NULL;
735         struct v4l2_mbus_framefmt mbus_fmt;
736         int ret, i;
737 
738         for (i = 0; i < bcap->num_sensor_formats; i++) {
739                 fmt = &sf[i];
740                 if (pixfmt->pixelformat == fmt->pixelformat)
741                         break;
742         }
743         if (i == bcap->num_sensor_formats)
744                 fmt = &sf[0];
745 
746         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
747         ret = v4l2_subdev_call(bcap->sd, video,
748                                 try_mbus_fmt, &mbus_fmt);
749         if (ret < 0)
750                 return ret;
751         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
752         if (bcap_fmt) {
753                 for (i = 0; i < bcap->num_sensor_formats; i++) {
754                         fmt = &sf[i];
755                         if (mbus_fmt.code == fmt->mbus_code)
756                                 break;
757                 }
758                 *bcap_fmt = *fmt;
759         }
760         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
761         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
762         return 0;
763 }
764 
765 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
766                                         struct v4l2_fmtdesc *fmt)
767 {
768         struct bcap_device *bcap_dev = video_drvdata(file);
769         struct bcap_format *sf = bcap_dev->sensor_formats;
770 
771         if (fmt->index >= bcap_dev->num_sensor_formats)
772                 return -EINVAL;
773 
774         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
775         strlcpy(fmt->description,
776                 sf[fmt->index].desc,
777                 sizeof(fmt->description));
778         fmt->pixelformat = sf[fmt->index].pixelformat;
779         return 0;
780 }
781 
782 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
783                                         struct v4l2_format *fmt)
784 {
785         struct bcap_device *bcap_dev = video_drvdata(file);
786         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
787 
788         return bcap_try_format(bcap_dev, pixfmt, NULL);
789 }
790 
791 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
792                                 struct v4l2_format *fmt)
793 {
794         struct bcap_device *bcap_dev = video_drvdata(file);
795 
796         fmt->fmt.pix = bcap_dev->fmt;
797         return 0;
798 }
799 
800 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
801                                 struct v4l2_format *fmt)
802 {
803         struct bcap_device *bcap_dev = video_drvdata(file);
804         struct v4l2_mbus_framefmt mbus_fmt;
805         struct bcap_format bcap_fmt;
806         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
807         int ret;
808 
809         if (vb2_is_busy(&bcap_dev->buffer_queue))
810                 return -EBUSY;
811 
812         /* see if format works */
813         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
814         if (ret < 0)
815                 return ret;
816 
817         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
818         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
819         if (ret < 0)
820                 return ret;
821         bcap_dev->fmt = *pixfmt;
822         bcap_dev->bpp = bcap_fmt.bpp;
823         bcap_dev->dlen = bcap_fmt.dlen;
824         return 0;
825 }
826 
827 static int bcap_querycap(struct file *file, void  *priv,
828                                 struct v4l2_capability *cap)
829 {
830         struct bcap_device *bcap_dev = video_drvdata(file);
831 
832         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
833         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
834         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
835         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
836         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
837         return 0;
838 }
839 
840 static int bcap_g_parm(struct file *file, void *fh,
841                                 struct v4l2_streamparm *a)
842 {
843         struct bcap_device *bcap_dev = video_drvdata(file);
844 
845         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
846                 return -EINVAL;
847         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
848 }
849 
850 static int bcap_s_parm(struct file *file, void *fh,
851                                 struct v4l2_streamparm *a)
852 {
853         struct bcap_device *bcap_dev = video_drvdata(file);
854 
855         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
856                 return -EINVAL;
857         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
858 }
859 
860 static int bcap_log_status(struct file *file, void *priv)
861 {
862         struct bcap_device *bcap_dev = video_drvdata(file);
863         /* status for sub devices */
864         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
865         return 0;
866 }
867 
868 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
869         .vidioc_querycap         = bcap_querycap,
870         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
871         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
872         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
873         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
874         .vidioc_enum_input       = bcap_enum_input,
875         .vidioc_g_input          = bcap_g_input,
876         .vidioc_s_input          = bcap_s_input,
877         .vidioc_querystd         = bcap_querystd,
878         .vidioc_s_std            = bcap_s_std,
879         .vidioc_g_std            = bcap_g_std,
880         .vidioc_s_dv_timings     = bcap_s_dv_timings,
881         .vidioc_g_dv_timings     = bcap_g_dv_timings,
882         .vidioc_query_dv_timings = bcap_query_dv_timings,
883         .vidioc_enum_dv_timings  = bcap_enum_dv_timings,
884         .vidioc_reqbufs          = bcap_reqbufs,
885         .vidioc_querybuf         = bcap_querybuf,
886         .vidioc_qbuf             = bcap_qbuf,
887         .vidioc_dqbuf            = bcap_dqbuf,
888         .vidioc_streamon         = bcap_streamon,
889         .vidioc_streamoff        = bcap_streamoff,
890         .vidioc_g_parm           = bcap_g_parm,
891         .vidioc_s_parm           = bcap_s_parm,
892         .vidioc_log_status       = bcap_log_status,
893 };
894 
895 static struct v4l2_file_operations bcap_fops = {
896         .owner = THIS_MODULE,
897         .open = bcap_open,
898         .release = bcap_release,
899         .unlocked_ioctl = video_ioctl2,
900         .mmap = bcap_mmap,
901 #ifndef CONFIG_MMU
902         .get_unmapped_area = bcap_get_unmapped_area,
903 #endif
904         .poll = bcap_poll
905 };
906 
907 static int bcap_probe(struct platform_device *pdev)
908 {
909         struct bcap_device *bcap_dev;
910         struct video_device *vfd;
911         struct i2c_adapter *i2c_adap;
912         struct bfin_capture_config *config;
913         struct vb2_queue *q;
914         struct bcap_route *route;
915         int ret;
916 
917         config = pdev->dev.platform_data;
918         if (!config || !config->num_inputs) {
919                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
920                 return -ENODEV;
921         }
922 
923         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
924         if (!bcap_dev) {
925                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
926                 return -ENOMEM;
927         }
928 
929         bcap_dev->cfg = config;
930 
931         bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
932         if (!bcap_dev->ppi) {
933                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
934                 ret = -ENODEV;
935                 goto err_free_dev;
936         }
937         bcap_dev->ppi->priv = bcap_dev;
938 
939         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
940         if (IS_ERR(bcap_dev->alloc_ctx)) {
941                 ret = PTR_ERR(bcap_dev->alloc_ctx);
942                 goto err_free_ppi;
943         }
944 
945         vfd = video_device_alloc();
946         if (!vfd) {
947                 ret = -ENOMEM;
948                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
949                 goto err_cleanup_ctx;
950         }
951 
952         /* initialize field of video device */
953         vfd->release            = video_device_release;
954         vfd->fops               = &bcap_fops;
955         vfd->ioctl_ops          = &bcap_ioctl_ops;
956         vfd->tvnorms            = 0;
957         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
958         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
959         bcap_dev->video_dev     = vfd;
960 
961         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
962         if (ret) {
963                 v4l2_err(pdev->dev.driver,
964                                 "Unable to register v4l2 device\n");
965                 goto err_release_vdev;
966         }
967         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
968 
969         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
970         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
971         if (ret) {
972                 v4l2_err(&bcap_dev->v4l2_dev,
973                                 "Unable to init control handler\n");
974                 goto err_unreg_v4l2;
975         }
976 
977         spin_lock_init(&bcap_dev->lock);
978         /* initialize queue */
979         q = &bcap_dev->buffer_queue;
980         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
981         q->io_modes = VB2_MMAP;
982         q->drv_priv = bcap_dev;
983         q->buf_struct_size = sizeof(struct bcap_buffer);
984         q->ops = &bcap_video_qops;
985         q->mem_ops = &vb2_dma_contig_memops;
986         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
987         q->lock = &bcap_dev->mutex;
988 
989         ret = vb2_queue_init(q);
990         if (ret)
991                 goto err_free_handler;
992 
993         mutex_init(&bcap_dev->mutex);
994         init_completion(&bcap_dev->comp);
995 
996         /* init video dma queues */
997         INIT_LIST_HEAD(&bcap_dev->dma_queue);
998 
999         vfd->lock = &bcap_dev->mutex;
1000 
1001         /* register video device */
1002         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1003         if (ret) {
1004                 v4l2_err(&bcap_dev->v4l2_dev,
1005                                 "Unable to register video device\n");
1006                 goto err_free_handler;
1007         }
1008         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1009         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1010                         video_device_node_name(vfd));
1011 
1012         /* load up the subdevice */
1013         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1014         if (!i2c_adap) {
1015                 v4l2_err(&bcap_dev->v4l2_dev,
1016                                 "Unable to find i2c adapter\n");
1017                 ret = -ENODEV;
1018                 goto err_unreg_vdev;
1019 
1020         }
1021         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1022                                                  i2c_adap,
1023                                                  &config->board_info,
1024                                                  NULL);
1025         if (bcap_dev->sd) {
1026                 int i;
1027 
1028                 /* update tvnorms from the sub devices */
1029                 for (i = 0; i < config->num_inputs; i++)
1030                         vfd->tvnorms |= config->inputs[i].std;
1031         } else {
1032                 v4l2_err(&bcap_dev->v4l2_dev,
1033                                 "Unable to register sub device\n");
1034                 ret = -ENODEV;
1035                 goto err_unreg_vdev;
1036         }
1037 
1038         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1039 
1040         /*
1041          * explicitly set input, otherwise some boards
1042          * may not work at the state as we expected
1043          */
1044         route = &config->routes[0];
1045         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1046                                 route->input, route->output, 0);
1047         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1048                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1049                 goto err_unreg_vdev;
1050         }
1051         bcap_dev->cur_input = 0;
1052         /* if this route has specific config, update ppi control */
1053         if (route->ppi_control)
1054                 config->ppi_control = route->ppi_control;
1055 
1056         /* now we can probe the default state */
1057         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1058                 v4l2_std_id std;
1059                 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
1060                 if (ret) {
1061                         v4l2_err(&bcap_dev->v4l2_dev,
1062                                         "Unable to get std\n");
1063                         goto err_unreg_vdev;
1064                 }
1065                 bcap_dev->std = std;
1066         }
1067         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1068                 struct v4l2_dv_timings dv_timings;
1069                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1070                                 g_dv_timings, &dv_timings);
1071                 if (ret) {
1072                         v4l2_err(&bcap_dev->v4l2_dev,
1073                                         "Unable to get dv timings\n");
1074                         goto err_unreg_vdev;
1075                 }
1076                 bcap_dev->dv_timings = dv_timings;
1077         }
1078         ret = bcap_init_sensor_formats(bcap_dev);
1079         if (ret) {
1080                 v4l2_err(&bcap_dev->v4l2_dev,
1081                                 "Unable to create sensor formats table\n");
1082                 goto err_unreg_vdev;
1083         }
1084         return 0;
1085 err_unreg_vdev:
1086         video_unregister_device(bcap_dev->video_dev);
1087         bcap_dev->video_dev = NULL;
1088 err_free_handler:
1089         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1090 err_unreg_v4l2:
1091         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1092 err_release_vdev:
1093         if (bcap_dev->video_dev)
1094                 video_device_release(bcap_dev->video_dev);
1095 err_cleanup_ctx:
1096         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1097 err_free_ppi:
1098         ppi_delete_instance(bcap_dev->ppi);
1099 err_free_dev:
1100         kfree(bcap_dev);
1101         return ret;
1102 }
1103 
1104 static int bcap_remove(struct platform_device *pdev)
1105 {
1106         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1107         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1108                                                 struct bcap_device, v4l2_dev);
1109 
1110         bcap_free_sensor_formats(bcap_dev);
1111         video_unregister_device(bcap_dev->video_dev);
1112         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1113         v4l2_device_unregister(v4l2_dev);
1114         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1115         ppi_delete_instance(bcap_dev->ppi);
1116         kfree(bcap_dev);
1117         return 0;
1118 }
1119 
1120 static struct platform_driver bcap_driver = {
1121         .driver = {
1122                 .name  = CAPTURE_DRV_NAME,
1123         },
1124         .probe = bcap_probe,
1125         .remove = bcap_remove,
1126 };
1127 module_platform_driver(bcap_driver);
1128 
1129 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1130 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1131 MODULE_LICENSE("GPL v2");
1132 

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