[media] v4l2: pass std by value to the write-only s_std ioctl
[sfrench/cifs-2.6.git] / 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-chip-ident.h>
36 #include <media/v4l2-common.h>
37 #include <media/v4l2-ctrls.h>
38 #include <media/v4l2-device.h>
39 #include <media/v4l2-ioctl.h>
40 #include <media/videobuf2-dma-contig.h>
41
42 #include <asm/dma.h>
43
44 #include <media/blackfin/bfin_capture.h>
45 #include <media/blackfin/ppi.h>
46
47 #define CAPTURE_DRV_NAME        "bfin_capture"
48 #define BCAP_MIN_NUM_BUF        2
49
50 struct bcap_format {
51         char *desc;
52         u32 pixelformat;
53         enum v4l2_mbus_pixelcode mbus_code;
54         int bpp; /* bits per pixel */
55         int dlen; /* data length for ppi in bits */
56 };
57
58 struct bcap_buffer {
59         struct vb2_buffer vb;
60         struct list_head list;
61 };
62
63 struct bcap_device {
64         /* capture device instance */
65         struct v4l2_device v4l2_dev;
66         /* v4l2 control handler */
67         struct v4l2_ctrl_handler ctrl_handler;
68         /* device node data */
69         struct video_device *video_dev;
70         /* sub device instance */
71         struct v4l2_subdev *sd;
72         /* capture config */
73         struct bfin_capture_config *cfg;
74         /* ppi interface */
75         struct ppi_if *ppi;
76         /* current input */
77         unsigned int cur_input;
78         /* current selected standard */
79         v4l2_std_id std;
80         /* current selected dv_timings */
81         struct v4l2_dv_timings dv_timings;
82         /* used to store pixel format */
83         struct v4l2_pix_format fmt;
84         /* bits per pixel*/
85         int bpp;
86         /* data length for ppi in bits */
87         int dlen;
88         /* used to store sensor supported format */
89         struct bcap_format *sensor_formats;
90         /* number of sensor formats array */
91         int num_sensor_formats;
92         /* pointing to current video buffer */
93         struct bcap_buffer *cur_frm;
94         /* buffer queue used in videobuf2 */
95         struct vb2_queue buffer_queue;
96         /* allocator-specific contexts for each plane */
97         struct vb2_alloc_ctx *alloc_ctx;
98         /* queue of filled frames */
99         struct list_head dma_queue;
100         /* used in videobuf2 callback */
101         spinlock_t lock;
102         /* used to access capture device */
103         struct mutex mutex;
104         /* used to wait ppi to complete one transfer */
105         struct completion comp;
106         /* prepare to stop */
107         bool stop;
108 };
109
110 struct bcap_fh {
111         struct v4l2_fh fh;
112         /* indicates whether this file handle is doing IO */
113         bool io_allowed;
114 };
115
116 static const struct bcap_format bcap_formats[] = {
117         {
118                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
119                 .pixelformat = V4L2_PIX_FMT_UYVY,
120                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_2X8,
121                 .bpp         = 16,
122                 .dlen        = 8,
123         },
124         {
125                 .desc        = "YCbCr 4:2:2 Interleaved YUYV",
126                 .pixelformat = V4L2_PIX_FMT_YUYV,
127                 .mbus_code   = V4L2_MBUS_FMT_YUYV8_2X8,
128                 .bpp         = 16,
129                 .dlen        = 8,
130         },
131         {
132                 .desc        = "YCbCr 4:2:2 Interleaved UYVY",
133                 .pixelformat = V4L2_PIX_FMT_UYVY,
134                 .mbus_code   = V4L2_MBUS_FMT_UYVY8_1X16,
135                 .bpp         = 16,
136                 .dlen        = 16,
137         },
138         {
139                 .desc        = "RGB 565",
140                 .pixelformat = V4L2_PIX_FMT_RGB565,
141                 .mbus_code   = V4L2_MBUS_FMT_RGB565_2X8_LE,
142                 .bpp         = 16,
143                 .dlen        = 8,
144         },
145         {
146                 .desc        = "RGB 444",
147                 .pixelformat = V4L2_PIX_FMT_RGB444,
148                 .mbus_code   = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
149                 .bpp         = 16,
150                 .dlen        = 8,
151         },
152
153 };
154 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
155
156 static irqreturn_t bcap_isr(int irq, void *dev_id);
157
158 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
159 {
160         return container_of(vb, struct bcap_buffer, vb);
161 }
162
163 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
164 {
165         enum v4l2_mbus_pixelcode code;
166         struct bcap_format *sf;
167         unsigned int num_formats = 0;
168         int i, j;
169
170         while (!v4l2_subdev_call(bcap_dev->sd, video,
171                                 enum_mbus_fmt, num_formats, &code))
172                 num_formats++;
173         if (!num_formats)
174                 return -ENXIO;
175
176         sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
177         if (!sf)
178                 return -ENOMEM;
179
180         for (i = 0; i < num_formats; i++) {
181                 v4l2_subdev_call(bcap_dev->sd, video,
182                                 enum_mbus_fmt, i, &code);
183                 for (j = 0; j < BCAP_MAX_FMTS; j++)
184                         if (code == bcap_formats[j].mbus_code)
185                                 break;
186                 if (j == BCAP_MAX_FMTS) {
187                         /* we don't allow this sensor working with our bridge */
188                         kfree(sf);
189                         return -EINVAL;
190                 }
191                 sf[i] = bcap_formats[j];
192         }
193         bcap_dev->sensor_formats = sf;
194         bcap_dev->num_sensor_formats = num_formats;
195         return 0;
196 }
197
198 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
199 {
200         bcap_dev->num_sensor_formats = 0;
201         kfree(bcap_dev->sensor_formats);
202         bcap_dev->sensor_formats = NULL;
203 }
204
205 static int bcap_open(struct file *file)
206 {
207         struct bcap_device *bcap_dev = video_drvdata(file);
208         struct video_device *vfd = bcap_dev->video_dev;
209         struct bcap_fh *bcap_fh;
210
211         if (!bcap_dev->sd) {
212                 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
213                 return -ENODEV;
214         }
215
216         bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
217         if (!bcap_fh) {
218                 v4l2_err(&bcap_dev->v4l2_dev,
219                          "unable to allocate memory for file handle object\n");
220                 return -ENOMEM;
221         }
222
223         v4l2_fh_init(&bcap_fh->fh, vfd);
224
225         /* store pointer to v4l2_fh in private_data member of file */
226         file->private_data = &bcap_fh->fh;
227         v4l2_fh_add(&bcap_fh->fh);
228         bcap_fh->io_allowed = false;
229         return 0;
230 }
231
232 static int bcap_release(struct file *file)
233 {
234         struct bcap_device *bcap_dev = video_drvdata(file);
235         struct v4l2_fh *fh = file->private_data;
236         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
237
238         /* if this instance is doing IO */
239         if (bcap_fh->io_allowed)
240                 vb2_queue_release(&bcap_dev->buffer_queue);
241
242         file->private_data = NULL;
243         v4l2_fh_del(&bcap_fh->fh);
244         v4l2_fh_exit(&bcap_fh->fh);
245         kfree(bcap_fh);
246         return 0;
247 }
248
249 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
250 {
251         struct bcap_device *bcap_dev = video_drvdata(file);
252         int ret;
253
254         if (mutex_lock_interruptible(&bcap_dev->mutex))
255                 return -ERESTARTSYS;
256         ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
257         mutex_unlock(&bcap_dev->mutex);
258         return ret;
259 }
260
261 #ifndef CONFIG_MMU
262 static unsigned long bcap_get_unmapped_area(struct file *file,
263                                             unsigned long addr,
264                                             unsigned long len,
265                                             unsigned long pgoff,
266                                             unsigned long flags)
267 {
268         struct bcap_device *bcap_dev = video_drvdata(file);
269
270         return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
271                                      addr,
272                                      len,
273                                      pgoff,
274                                      flags);
275 }
276 #endif
277
278 static unsigned int bcap_poll(struct file *file, poll_table *wait)
279 {
280         struct bcap_device *bcap_dev = video_drvdata(file);
281         unsigned int res;
282
283         mutex_lock(&bcap_dev->mutex);
284         res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
285         mutex_unlock(&bcap_dev->mutex);
286         return res;
287 }
288
289 static int bcap_queue_setup(struct vb2_queue *vq,
290                                 const struct v4l2_format *fmt,
291                                 unsigned int *nbuffers, unsigned int *nplanes,
292                                 unsigned int sizes[], void *alloc_ctxs[])
293 {
294         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
295
296         if (*nbuffers < BCAP_MIN_NUM_BUF)
297                 *nbuffers = BCAP_MIN_NUM_BUF;
298
299         *nplanes = 1;
300         sizes[0] = bcap_dev->fmt.sizeimage;
301         alloc_ctxs[0] = bcap_dev->alloc_ctx;
302
303         return 0;
304 }
305
306 static int bcap_buffer_init(struct vb2_buffer *vb)
307 {
308         struct bcap_buffer *buf = to_bcap_vb(vb);
309
310         INIT_LIST_HEAD(&buf->list);
311         return 0;
312 }
313
314 static int bcap_buffer_prepare(struct vb2_buffer *vb)
315 {
316         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
317         struct bcap_buffer *buf = to_bcap_vb(vb);
318         unsigned long size;
319
320         size = bcap_dev->fmt.sizeimage;
321         if (vb2_plane_size(vb, 0) < size) {
322                 v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
323                                 vb2_plane_size(vb, 0), size);
324                 return -EINVAL;
325         }
326         vb2_set_plane_payload(&buf->vb, 0, size);
327
328         return 0;
329 }
330
331 static void bcap_buffer_queue(struct vb2_buffer *vb)
332 {
333         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
334         struct bcap_buffer *buf = to_bcap_vb(vb);
335         unsigned long flags;
336
337         spin_lock_irqsave(&bcap_dev->lock, flags);
338         list_add_tail(&buf->list, &bcap_dev->dma_queue);
339         spin_unlock_irqrestore(&bcap_dev->lock, flags);
340 }
341
342 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
343 {
344         struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
345         struct bcap_buffer *buf = to_bcap_vb(vb);
346         unsigned long flags;
347
348         spin_lock_irqsave(&bcap_dev->lock, flags);
349         list_del_init(&buf->list);
350         spin_unlock_irqrestore(&bcap_dev->lock, flags);
351 }
352
353 static void bcap_lock(struct vb2_queue *vq)
354 {
355         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
356         mutex_lock(&bcap_dev->mutex);
357 }
358
359 static void bcap_unlock(struct vb2_queue *vq)
360 {
361         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
362         mutex_unlock(&bcap_dev->mutex);
363 }
364
365 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
366 {
367         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
368         struct ppi_if *ppi = bcap_dev->ppi;
369         struct ppi_params params;
370         int ret;
371
372         /* enable streamon on the sub device */
373         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
374         if (ret && (ret != -ENOIOCTLCMD)) {
375                 v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
376                 return ret;
377         }
378
379         /* set ppi params */
380         params.width = bcap_dev->fmt.width;
381         params.height = bcap_dev->fmt.height;
382         params.bpp = bcap_dev->bpp;
383         params.dlen = bcap_dev->dlen;
384         params.ppi_control = bcap_dev->cfg->ppi_control;
385         params.int_mask = bcap_dev->cfg->int_mask;
386         if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
387                         & V4L2_IN_CAP_DV_TIMINGS) {
388                 struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
389
390                 params.hdelay = bt->hsync + bt->hbackporch;
391                 params.vdelay = bt->vsync + bt->vbackporch;
392                 params.line = bt->hfrontporch + bt->hsync
393                                 + bt->hbackporch + bt->width;
394                 params.frame = bt->vfrontporch + bt->vsync
395                                 + bt->vbackporch + bt->height;
396                 if (bt->interlaced)
397                         params.frame += bt->il_vfrontporch + bt->il_vsync
398                                         + bt->il_vbackporch;
399         } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
400                         & V4L2_IN_CAP_STD) {
401                 params.hdelay = 0;
402                 params.vdelay = 0;
403                 if (bcap_dev->std & V4L2_STD_525_60) {
404                         params.line = 858;
405                         params.frame = 525;
406                 } else {
407                         params.line = 864;
408                         params.frame = 625;
409                 }
410         } else {
411                 params.hdelay = 0;
412                 params.vdelay = 0;
413                 params.line = params.width + bcap_dev->cfg->blank_pixels;
414                 params.frame = params.height;
415         }
416         ret = ppi->ops->set_params(ppi, &params);
417         if (ret < 0) {
418                 v4l2_err(&bcap_dev->v4l2_dev,
419                                 "Error in setting ppi params\n");
420                 return ret;
421         }
422
423         /* attach ppi DMA irq handler */
424         ret = ppi->ops->attach_irq(ppi, bcap_isr);
425         if (ret < 0) {
426                 v4l2_err(&bcap_dev->v4l2_dev,
427                                 "Error in attaching interrupt handler\n");
428                 return ret;
429         }
430
431         INIT_COMPLETION(bcap_dev->comp);
432         bcap_dev->stop = false;
433         return 0;
434 }
435
436 static int bcap_stop_streaming(struct vb2_queue *vq)
437 {
438         struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
439         struct ppi_if *ppi = bcap_dev->ppi;
440         int ret;
441
442         if (!vb2_is_streaming(vq))
443                 return 0;
444
445         bcap_dev->stop = true;
446         wait_for_completion(&bcap_dev->comp);
447         ppi->ops->stop(ppi);
448         ppi->ops->detach_irq(ppi);
449         ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
450         if (ret && (ret != -ENOIOCTLCMD))
451                 v4l2_err(&bcap_dev->v4l2_dev,
452                                 "stream off failed in subdev\n");
453
454         /* release all active buffers */
455         while (!list_empty(&bcap_dev->dma_queue)) {
456                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
457                                                 struct bcap_buffer, list);
458                 list_del(&bcap_dev->cur_frm->list);
459                 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
460         }
461         return 0;
462 }
463
464 static struct vb2_ops bcap_video_qops = {
465         .queue_setup            = bcap_queue_setup,
466         .buf_init               = bcap_buffer_init,
467         .buf_prepare            = bcap_buffer_prepare,
468         .buf_cleanup            = bcap_buffer_cleanup,
469         .buf_queue              = bcap_buffer_queue,
470         .wait_prepare           = bcap_unlock,
471         .wait_finish            = bcap_lock,
472         .start_streaming        = bcap_start_streaming,
473         .stop_streaming         = bcap_stop_streaming,
474 };
475
476 static int bcap_reqbufs(struct file *file, void *priv,
477                         struct v4l2_requestbuffers *req_buf)
478 {
479         struct bcap_device *bcap_dev = video_drvdata(file);
480         struct vb2_queue *vq = &bcap_dev->buffer_queue;
481         struct v4l2_fh *fh = file->private_data;
482         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
483
484         if (vb2_is_busy(vq))
485                 return -EBUSY;
486
487         bcap_fh->io_allowed = true;
488
489         return vb2_reqbufs(vq, req_buf);
490 }
491
492 static int bcap_querybuf(struct file *file, void *priv,
493                                 struct v4l2_buffer *buf)
494 {
495         struct bcap_device *bcap_dev = video_drvdata(file);
496
497         return vb2_querybuf(&bcap_dev->buffer_queue, buf);
498 }
499
500 static int bcap_qbuf(struct file *file, void *priv,
501                         struct v4l2_buffer *buf)
502 {
503         struct bcap_device *bcap_dev = video_drvdata(file);
504         struct v4l2_fh *fh = file->private_data;
505         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
506
507         if (!bcap_fh->io_allowed)
508                 return -EBUSY;
509
510         return vb2_qbuf(&bcap_dev->buffer_queue, buf);
511 }
512
513 static int bcap_dqbuf(struct file *file, void *priv,
514                         struct v4l2_buffer *buf)
515 {
516         struct bcap_device *bcap_dev = video_drvdata(file);
517         struct v4l2_fh *fh = file->private_data;
518         struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
519
520         if (!bcap_fh->io_allowed)
521                 return -EBUSY;
522
523         return vb2_dqbuf(&bcap_dev->buffer_queue,
524                                 buf, file->f_flags & O_NONBLOCK);
525 }
526
527 static irqreturn_t bcap_isr(int irq, void *dev_id)
528 {
529         struct ppi_if *ppi = dev_id;
530         struct bcap_device *bcap_dev = ppi->priv;
531         struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
532         dma_addr_t addr;
533
534         spin_lock(&bcap_dev->lock);
535
536         if (!list_empty(&bcap_dev->dma_queue)) {
537                 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
538                 if (ppi->err) {
539                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
540                         ppi->err = false;
541                 } else {
542                         vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
543                 }
544                 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
545                                 struct bcap_buffer, list);
546                 list_del(&bcap_dev->cur_frm->list);
547         } else {
548                 /* clear error flag, we will get a new frame */
549                 if (ppi->err)
550                         ppi->err = false;
551         }
552
553         ppi->ops->stop(ppi);
554
555         if (bcap_dev->stop) {
556                 complete(&bcap_dev->comp);
557         } else {
558                 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
559                 ppi->ops->update_addr(ppi, (unsigned long)addr);
560                 ppi->ops->start(ppi);
561         }
562
563         spin_unlock(&bcap_dev->lock);
564
565         return IRQ_HANDLED;
566 }
567
568 static int bcap_streamon(struct file *file, void *priv,
569                                 enum v4l2_buf_type buf_type)
570 {
571         struct bcap_device *bcap_dev = video_drvdata(file);
572         struct bcap_fh *fh = file->private_data;
573         struct ppi_if *ppi = bcap_dev->ppi;
574         dma_addr_t addr;
575         int ret;
576
577         if (!fh->io_allowed)
578                 return -EBUSY;
579
580         /* call streamon to start streaming in videobuf */
581         ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
582         if (ret)
583                 return ret;
584
585         /* if dma queue is empty, return error */
586         if (list_empty(&bcap_dev->dma_queue)) {
587                 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
588                 ret = -EINVAL;
589                 goto err;
590         }
591
592         /* get the next frame from the dma queue */
593         bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
594                                         struct bcap_buffer, list);
595         /* remove buffer from the dma queue */
596         list_del(&bcap_dev->cur_frm->list);
597         addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
598         /* update DMA address */
599         ppi->ops->update_addr(ppi, (unsigned long)addr);
600         /* enable ppi */
601         ppi->ops->start(ppi);
602
603         return 0;
604 err:
605         vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
606         return ret;
607 }
608
609 static int bcap_streamoff(struct file *file, void *priv,
610                                 enum v4l2_buf_type buf_type)
611 {
612         struct bcap_device *bcap_dev = video_drvdata(file);
613         struct bcap_fh *fh = file->private_data;
614
615         if (!fh->io_allowed)
616                 return -EBUSY;
617
618         return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
619 }
620
621 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
622 {
623         struct bcap_device *bcap_dev = video_drvdata(file);
624
625         return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
626 }
627
628 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
629 {
630         struct bcap_device *bcap_dev = video_drvdata(file);
631
632         *std = bcap_dev->std;
633         return 0;
634 }
635
636 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
637 {
638         struct bcap_device *bcap_dev = video_drvdata(file);
639         int ret;
640
641         if (vb2_is_busy(&bcap_dev->buffer_queue))
642                 return -EBUSY;
643
644         ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, std);
645         if (ret < 0)
646                 return ret;
647
648         bcap_dev->std = std;
649         return 0;
650 }
651
652 static int bcap_g_dv_timings(struct file *file, void *priv,
653                                 struct v4l2_dv_timings *timings)
654 {
655         struct bcap_device *bcap_dev = video_drvdata(file);
656         int ret;
657
658         ret = v4l2_subdev_call(bcap_dev->sd, video,
659                                 g_dv_timings, timings);
660         if (ret < 0)
661                 return ret;
662
663         bcap_dev->dv_timings = *timings;
664         return 0;
665 }
666
667 static int bcap_s_dv_timings(struct file *file, void *priv,
668                                 struct v4l2_dv_timings *timings)
669 {
670         struct bcap_device *bcap_dev = video_drvdata(file);
671         int ret;
672         if (vb2_is_busy(&bcap_dev->buffer_queue))
673                 return -EBUSY;
674
675         ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
676         if (ret < 0)
677                 return ret;
678
679         bcap_dev->dv_timings = *timings;
680         return 0;
681 }
682
683 static int bcap_enum_input(struct file *file, void *priv,
684                                 struct v4l2_input *input)
685 {
686         struct bcap_device *bcap_dev = video_drvdata(file);
687         struct bfin_capture_config *config = bcap_dev->cfg;
688         int ret;
689         u32 status;
690
691         if (input->index >= config->num_inputs)
692                 return -EINVAL;
693
694         *input = config->inputs[input->index];
695         /* get input status */
696         ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
697         if (!ret)
698                 input->status = status;
699         return 0;
700 }
701
702 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
703 {
704         struct bcap_device *bcap_dev = video_drvdata(file);
705
706         *index = bcap_dev->cur_input;
707         return 0;
708 }
709
710 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
711 {
712         struct bcap_device *bcap_dev = video_drvdata(file);
713         struct bfin_capture_config *config = bcap_dev->cfg;
714         struct bcap_route *route;
715         int ret;
716
717         if (vb2_is_busy(&bcap_dev->buffer_queue))
718                 return -EBUSY;
719
720         if (index >= config->num_inputs)
721                 return -EINVAL;
722
723         route = &config->routes[index];
724         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
725                                 route->input, route->output, 0);
726         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
727                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
728                 return ret;
729         }
730         bcap_dev->cur_input = index;
731         /* if this route has specific config, update ppi control */
732         if (route->ppi_control)
733                 config->ppi_control = route->ppi_control;
734         return 0;
735 }
736
737 static int bcap_try_format(struct bcap_device *bcap,
738                                 struct v4l2_pix_format *pixfmt,
739                                 struct bcap_format *bcap_fmt)
740 {
741         struct bcap_format *sf = bcap->sensor_formats;
742         struct bcap_format *fmt = NULL;
743         struct v4l2_mbus_framefmt mbus_fmt;
744         int ret, i;
745
746         for (i = 0; i < bcap->num_sensor_formats; i++) {
747                 fmt = &sf[i];
748                 if (pixfmt->pixelformat == fmt->pixelformat)
749                         break;
750         }
751         if (i == bcap->num_sensor_formats)
752                 fmt = &sf[0];
753
754         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
755         ret = v4l2_subdev_call(bcap->sd, video,
756                                 try_mbus_fmt, &mbus_fmt);
757         if (ret < 0)
758                 return ret;
759         v4l2_fill_pix_format(pixfmt, &mbus_fmt);
760         if (bcap_fmt) {
761                 for (i = 0; i < bcap->num_sensor_formats; i++) {
762                         fmt = &sf[i];
763                         if (mbus_fmt.code == fmt->mbus_code)
764                                 break;
765                 }
766                 *bcap_fmt = *fmt;
767         }
768         pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
769         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
770         return 0;
771 }
772
773 static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
774                                         struct v4l2_fmtdesc *fmt)
775 {
776         struct bcap_device *bcap_dev = video_drvdata(file);
777         struct bcap_format *sf = bcap_dev->sensor_formats;
778
779         if (fmt->index >= bcap_dev->num_sensor_formats)
780                 return -EINVAL;
781
782         fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
783         strlcpy(fmt->description,
784                 sf[fmt->index].desc,
785                 sizeof(fmt->description));
786         fmt->pixelformat = sf[fmt->index].pixelformat;
787         return 0;
788 }
789
790 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
791                                         struct v4l2_format *fmt)
792 {
793         struct bcap_device *bcap_dev = video_drvdata(file);
794         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
795
796         return bcap_try_format(bcap_dev, pixfmt, NULL);
797 }
798
799 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
800                                 struct v4l2_format *fmt)
801 {
802         struct bcap_device *bcap_dev = video_drvdata(file);
803
804         fmt->fmt.pix = bcap_dev->fmt;
805         return 0;
806 }
807
808 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
809                                 struct v4l2_format *fmt)
810 {
811         struct bcap_device *bcap_dev = video_drvdata(file);
812         struct v4l2_mbus_framefmt mbus_fmt;
813         struct bcap_format bcap_fmt;
814         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
815         int ret;
816
817         if (vb2_is_busy(&bcap_dev->buffer_queue))
818                 return -EBUSY;
819
820         /* see if format works */
821         ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
822         if (ret < 0)
823                 return ret;
824
825         v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
826         ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
827         if (ret < 0)
828                 return ret;
829         bcap_dev->fmt = *pixfmt;
830         bcap_dev->bpp = bcap_fmt.bpp;
831         bcap_dev->dlen = bcap_fmt.dlen;
832         return 0;
833 }
834
835 static int bcap_querycap(struct file *file, void  *priv,
836                                 struct v4l2_capability *cap)
837 {
838         struct bcap_device *bcap_dev = video_drvdata(file);
839
840         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
841         strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
842         strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
843         strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
844         return 0;
845 }
846
847 static int bcap_g_parm(struct file *file, void *fh,
848                                 struct v4l2_streamparm *a)
849 {
850         struct bcap_device *bcap_dev = video_drvdata(file);
851
852         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
853                 return -EINVAL;
854         return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
855 }
856
857 static int bcap_s_parm(struct file *file, void *fh,
858                                 struct v4l2_streamparm *a)
859 {
860         struct bcap_device *bcap_dev = video_drvdata(file);
861
862         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
863                 return -EINVAL;
864         return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
865 }
866
867 static int bcap_g_chip_ident(struct file *file, void *priv,
868                 struct v4l2_dbg_chip_ident *chip)
869 {
870         struct bcap_device *bcap_dev = video_drvdata(file);
871
872         chip->ident = V4L2_IDENT_NONE;
873         chip->revision = 0;
874         if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
875                         chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
876                 return -EINVAL;
877
878         return v4l2_subdev_call(bcap_dev->sd, core,
879                         g_chip_ident, chip);
880 }
881
882 #ifdef CONFIG_VIDEO_ADV_DEBUG
883 static int bcap_dbg_g_register(struct file *file, void *priv,
884                 struct v4l2_dbg_register *reg)
885 {
886         struct bcap_device *bcap_dev = video_drvdata(file);
887
888         return v4l2_subdev_call(bcap_dev->sd, core,
889                         g_register, reg);
890 }
891
892 static int bcap_dbg_s_register(struct file *file, void *priv,
893                 struct v4l2_dbg_register *reg)
894 {
895         struct bcap_device *bcap_dev = video_drvdata(file);
896
897         return v4l2_subdev_call(bcap_dev->sd, core,
898                         s_register, reg);
899 }
900 #endif
901
902 static int bcap_log_status(struct file *file, void *priv)
903 {
904         struct bcap_device *bcap_dev = video_drvdata(file);
905         /* status for sub devices */
906         v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
907         return 0;
908 }
909
910 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
911         .vidioc_querycap         = bcap_querycap,
912         .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
913         .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
914         .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
915         .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
916         .vidioc_enum_input       = bcap_enum_input,
917         .vidioc_g_input          = bcap_g_input,
918         .vidioc_s_input          = bcap_s_input,
919         .vidioc_querystd         = bcap_querystd,
920         .vidioc_s_std            = bcap_s_std,
921         .vidioc_g_std            = bcap_g_std,
922         .vidioc_s_dv_timings     = bcap_s_dv_timings,
923         .vidioc_g_dv_timings     = bcap_g_dv_timings,
924         .vidioc_reqbufs          = bcap_reqbufs,
925         .vidioc_querybuf         = bcap_querybuf,
926         .vidioc_qbuf             = bcap_qbuf,
927         .vidioc_dqbuf            = bcap_dqbuf,
928         .vidioc_streamon         = bcap_streamon,
929         .vidioc_streamoff        = bcap_streamoff,
930         .vidioc_g_parm           = bcap_g_parm,
931         .vidioc_s_parm           = bcap_s_parm,
932         .vidioc_g_chip_ident     = bcap_g_chip_ident,
933 #ifdef CONFIG_VIDEO_ADV_DEBUG
934         .vidioc_g_register       = bcap_dbg_g_register,
935         .vidioc_s_register       = bcap_dbg_s_register,
936 #endif
937         .vidioc_log_status       = bcap_log_status,
938 };
939
940 static struct v4l2_file_operations bcap_fops = {
941         .owner = THIS_MODULE,
942         .open = bcap_open,
943         .release = bcap_release,
944         .unlocked_ioctl = video_ioctl2,
945         .mmap = bcap_mmap,
946 #ifndef CONFIG_MMU
947         .get_unmapped_area = bcap_get_unmapped_area,
948 #endif
949         .poll = bcap_poll
950 };
951
952 static int bcap_probe(struct platform_device *pdev)
953 {
954         struct bcap_device *bcap_dev;
955         struct video_device *vfd;
956         struct i2c_adapter *i2c_adap;
957         struct bfin_capture_config *config;
958         struct vb2_queue *q;
959         struct bcap_route *route;
960         int ret;
961
962         config = pdev->dev.platform_data;
963         if (!config) {
964                 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
965                 return -ENODEV;
966         }
967
968         bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
969         if (!bcap_dev) {
970                 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
971                 return -ENOMEM;
972         }
973
974         bcap_dev->cfg = config;
975
976         bcap_dev->ppi = ppi_create_instance(config->ppi_info);
977         if (!bcap_dev->ppi) {
978                 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
979                 ret = -ENODEV;
980                 goto err_free_dev;
981         }
982         bcap_dev->ppi->priv = bcap_dev;
983
984         bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
985         if (IS_ERR(bcap_dev->alloc_ctx)) {
986                 ret = PTR_ERR(bcap_dev->alloc_ctx);
987                 goto err_free_ppi;
988         }
989
990         vfd = video_device_alloc();
991         if (!vfd) {
992                 ret = -ENOMEM;
993                 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
994                 goto err_cleanup_ctx;
995         }
996
997         /* initialize field of video device */
998         vfd->release            = video_device_release;
999         vfd->fops               = &bcap_fops;
1000         vfd->ioctl_ops          = &bcap_ioctl_ops;
1001         vfd->tvnorms            = 0;
1002         vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
1003         set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
1004         strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
1005         bcap_dev->video_dev     = vfd;
1006
1007         ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
1008         if (ret) {
1009                 v4l2_err(pdev->dev.driver,
1010                                 "Unable to register v4l2 device\n");
1011                 goto err_release_vdev;
1012         }
1013         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
1014
1015         bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
1016         ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
1017         if (ret) {
1018                 v4l2_err(&bcap_dev->v4l2_dev,
1019                                 "Unable to init control handler\n");
1020                 goto err_unreg_v4l2;
1021         }
1022
1023         spin_lock_init(&bcap_dev->lock);
1024         /* initialize queue */
1025         q = &bcap_dev->buffer_queue;
1026         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1027         q->io_modes = VB2_MMAP;
1028         q->drv_priv = bcap_dev;
1029         q->buf_struct_size = sizeof(struct bcap_buffer);
1030         q->ops = &bcap_video_qops;
1031         q->mem_ops = &vb2_dma_contig_memops;
1032         q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1033
1034         vb2_queue_init(q);
1035
1036         mutex_init(&bcap_dev->mutex);
1037         init_completion(&bcap_dev->comp);
1038
1039         /* init video dma queues */
1040         INIT_LIST_HEAD(&bcap_dev->dma_queue);
1041
1042         vfd->lock = &bcap_dev->mutex;
1043
1044         /* register video device */
1045         ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1046         if (ret) {
1047                 v4l2_err(&bcap_dev->v4l2_dev,
1048                                 "Unable to register video device\n");
1049                 goto err_free_handler;
1050         }
1051         video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1052         v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1053                         video_device_node_name(vfd));
1054
1055         /* load up the subdevice */
1056         i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1057         if (!i2c_adap) {
1058                 v4l2_err(&bcap_dev->v4l2_dev,
1059                                 "Unable to find i2c adapter\n");
1060                 ret = -ENODEV;
1061                 goto err_unreg_vdev;
1062
1063         }
1064         bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1065                                                  i2c_adap,
1066                                                  &config->board_info,
1067                                                  NULL);
1068         if (bcap_dev->sd) {
1069                 int i;
1070                 if (!config->num_inputs) {
1071                         v4l2_err(&bcap_dev->v4l2_dev,
1072                                         "Unable to work without input\n");
1073                         goto err_unreg_vdev;
1074                 }
1075
1076                 /* update tvnorms from the sub devices */
1077                 for (i = 0; i < config->num_inputs; i++)
1078                         vfd->tvnorms |= config->inputs[i].std;
1079         } else {
1080                 v4l2_err(&bcap_dev->v4l2_dev,
1081                                 "Unable to register sub device\n");
1082                 goto err_unreg_vdev;
1083         }
1084
1085         v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1086
1087         /*
1088          * explicitly set input, otherwise some boards
1089          * may not work at the state as we expected
1090          */
1091         route = &config->routes[0];
1092         ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1093                                 route->input, route->output, 0);
1094         if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1095                 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1096                 goto err_unreg_vdev;
1097         }
1098         bcap_dev->cur_input = 0;
1099         /* if this route has specific config, update ppi control */
1100         if (route->ppi_control)
1101                 config->ppi_control = route->ppi_control;
1102
1103         /* now we can probe the default state */
1104         if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1105                 v4l2_std_id std;
1106                 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
1107                 if (ret) {
1108                         v4l2_err(&bcap_dev->v4l2_dev,
1109                                         "Unable to get std\n");
1110                         goto err_unreg_vdev;
1111                 }
1112                 bcap_dev->std = std;
1113         }
1114         if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1115                 struct v4l2_dv_timings dv_timings;
1116                 ret = v4l2_subdev_call(bcap_dev->sd, video,
1117                                 g_dv_timings, &dv_timings);
1118                 if (ret) {
1119                         v4l2_err(&bcap_dev->v4l2_dev,
1120                                         "Unable to get dv timings\n");
1121                         goto err_unreg_vdev;
1122                 }
1123                 bcap_dev->dv_timings = dv_timings;
1124         }
1125         ret = bcap_init_sensor_formats(bcap_dev);
1126         if (ret) {
1127                 v4l2_err(&bcap_dev->v4l2_dev,
1128                                 "Unable to create sensor formats table\n");
1129                 goto err_unreg_vdev;
1130         }
1131         return 0;
1132 err_unreg_vdev:
1133         video_unregister_device(bcap_dev->video_dev);
1134         bcap_dev->video_dev = NULL;
1135 err_free_handler:
1136         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1137 err_unreg_v4l2:
1138         v4l2_device_unregister(&bcap_dev->v4l2_dev);
1139 err_release_vdev:
1140         if (bcap_dev->video_dev)
1141                 video_device_release(bcap_dev->video_dev);
1142 err_cleanup_ctx:
1143         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1144 err_free_ppi:
1145         ppi_delete_instance(bcap_dev->ppi);
1146 err_free_dev:
1147         kfree(bcap_dev);
1148         return ret;
1149 }
1150
1151 static int bcap_remove(struct platform_device *pdev)
1152 {
1153         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1154         struct bcap_device *bcap_dev = container_of(v4l2_dev,
1155                                                 struct bcap_device, v4l2_dev);
1156
1157         bcap_free_sensor_formats(bcap_dev);
1158         video_unregister_device(bcap_dev->video_dev);
1159         v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1160         v4l2_device_unregister(v4l2_dev);
1161         vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1162         ppi_delete_instance(bcap_dev->ppi);
1163         kfree(bcap_dev);
1164         return 0;
1165 }
1166
1167 static struct platform_driver bcap_driver = {
1168         .driver = {
1169                 .name  = CAPTURE_DRV_NAME,
1170                 .owner = THIS_MODULE,
1171         },
1172         .probe = bcap_probe,
1173         .remove = bcap_remove,
1174 };
1175 module_platform_driver(bcap_driver);
1176
1177 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1178 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1179 MODULE_LICENSE("GPL v2");