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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / platform / blackfin / bfin_capture.c
blob281916591437fa8196cf9312a873c36135a7f915
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 int 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 if (!vb2_is_streaming(vq))
437 return 0;
438
439 bcap_dev->stop = true;
440 wait_for_completion(&bcap_dev->comp);
441 ppi->ops->stop(ppi);
442 ppi->ops->detach_irq(ppi);
443 ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
444 if (ret && (ret != -ENOIOCTLCMD))
445 v4l2_err(&bcap_dev->v4l2_dev,
446 "stream off failed in subdev\n");
447
448 /* release all active buffers */
449 while (!list_empty(&bcap_dev->dma_queue)) {
450 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
451 struct bcap_buffer, list);
452 list_del(&bcap_dev->cur_frm->list);
453 vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
454 }
455 return 0;
456 }
457
458 static struct vb2_ops bcap_video_qops = {
459 .queue_setup = bcap_queue_setup,
460 .buf_init = bcap_buffer_init,
461 .buf_prepare = bcap_buffer_prepare,
462 .buf_cleanup = bcap_buffer_cleanup,
463 .buf_queue = bcap_buffer_queue,
464 .wait_prepare = bcap_unlock,
465 .wait_finish = bcap_lock,
466 .start_streaming = bcap_start_streaming,
467 .stop_streaming = bcap_stop_streaming,
468 };
469
470 static int bcap_reqbufs(struct file *file, void *priv,
471 struct v4l2_requestbuffers *req_buf)
472 {
473 struct bcap_device *bcap_dev = video_drvdata(file);
474 struct vb2_queue *vq = &bcap_dev->buffer_queue;
475 struct v4l2_fh *fh = file->private_data;
476 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
477
478 if (vb2_is_busy(vq))
479 return -EBUSY;
480
481 bcap_fh->io_allowed = true;
482
483 return vb2_reqbufs(vq, req_buf);
484 }
485
486 static int bcap_querybuf(struct file *file, void *priv,
487 struct v4l2_buffer *buf)
488 {
489 struct bcap_device *bcap_dev = video_drvdata(file);
490
491 return vb2_querybuf(&bcap_dev->buffer_queue, buf);
492 }
493
494 static int bcap_qbuf(struct file *file, void *priv,
495 struct v4l2_buffer *buf)
496 {
497 struct bcap_device *bcap_dev = video_drvdata(file);
498 struct v4l2_fh *fh = file->private_data;
499 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
500
501 if (!bcap_fh->io_allowed)
502 return -EBUSY;
503
504 return vb2_qbuf(&bcap_dev->buffer_queue, buf);
505 }
506
507 static int bcap_dqbuf(struct file *file, void *priv,
508 struct v4l2_buffer *buf)
509 {
510 struct bcap_device *bcap_dev = video_drvdata(file);
511 struct v4l2_fh *fh = file->private_data;
512 struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
513
514 if (!bcap_fh->io_allowed)
515 return -EBUSY;
516
517 return vb2_dqbuf(&bcap_dev->buffer_queue,
518 buf, file->f_flags & O_NONBLOCK);
519 }
520
521 static irqreturn_t bcap_isr(int irq, void *dev_id)
522 {
523 struct ppi_if *ppi = dev_id;
524 struct bcap_device *bcap_dev = ppi->priv;
525 struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
526 dma_addr_t addr;
527
528 spin_lock(&bcap_dev->lock);
529
530 if (!list_empty(&bcap_dev->dma_queue)) {
531 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
532 if (ppi->err) {
533 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
534 ppi->err = false;
535 } else {
536 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
537 }
538 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
539 struct bcap_buffer, list);
540 list_del(&bcap_dev->cur_frm->list);
541 } else {
542 /* clear error flag, we will get a new frame */
543 if (ppi->err)
544 ppi->err = false;
545 }
546
547 ppi->ops->stop(ppi);
548
549 if (bcap_dev->stop) {
550 complete(&bcap_dev->comp);
551 } else {
552 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
553 ppi->ops->update_addr(ppi, (unsigned long)addr);
554 ppi->ops->start(ppi);
555 }
556
557 spin_unlock(&bcap_dev->lock);
558
559 return IRQ_HANDLED;
560 }
561
562 static int bcap_streamon(struct file *file, void *priv,
563 enum v4l2_buf_type buf_type)
564 {
565 struct bcap_device *bcap_dev = video_drvdata(file);
566 struct bcap_fh *fh = file->private_data;
567 struct ppi_if *ppi = bcap_dev->ppi;
568 dma_addr_t addr;
569 int ret;
570
571 if (!fh->io_allowed)
572 return -EBUSY;
573
574 /* call streamon to start streaming in videobuf */
575 ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
576 if (ret)
577 return ret;
578
579 /* if dma queue is empty, return error */
580 if (list_empty(&bcap_dev->dma_queue)) {
581 v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
582 ret = -EINVAL;
583 goto err;
584 }
585
586 /* get the next frame from the dma queue */
587 bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
588 struct bcap_buffer, list);
589 /* remove buffer from the dma queue */
590 list_del(&bcap_dev->cur_frm->list);
591 addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
592 /* update DMA address */
593 ppi->ops->update_addr(ppi, (unsigned long)addr);
594 /* enable ppi */
595 ppi->ops->start(ppi);
596
597 return 0;
598 err:
599 vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
600 return ret;
601 }
602
603 static int bcap_streamoff(struct file *file, void *priv,
604 enum v4l2_buf_type buf_type)
605 {
606 struct bcap_device *bcap_dev = video_drvdata(file);
607 struct bcap_fh *fh = file->private_data;
608
609 if (!fh->io_allowed)
610 return -EBUSY;
611
612 return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
613 }
614
615 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
616 {
617 struct bcap_device *bcap_dev = video_drvdata(file);
618
619 return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
620 }
621
622 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
623 {
624 struct bcap_device *bcap_dev = video_drvdata(file);
625
626 *std = bcap_dev->std;
627 return 0;
628 }
629
630 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
631 {
632 struct bcap_device *bcap_dev = video_drvdata(file);
633 int ret;
634
635 if (vb2_is_busy(&bcap_dev->buffer_queue))
636 return -EBUSY;
637
638 ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, std);
639 if (ret < 0)
640 return ret;
641
642 bcap_dev->std = std;
643 return 0;
644 }
645
646 static int bcap_enum_dv_timings(struct file *file, void *priv,
647 struct v4l2_enum_dv_timings *timings)
648 {
649 struct bcap_device *bcap_dev = video_drvdata(file);
650
651 return v4l2_subdev_call(bcap_dev->sd, video,
652 enum_dv_timings, timings);
653 }
654
655 static int bcap_query_dv_timings(struct file *file, void *priv,
656 struct v4l2_dv_timings *timings)
657 {
658 struct bcap_device *bcap_dev = video_drvdata(file);
659
660 return v4l2_subdev_call(bcap_dev->sd, video,
661 query_dv_timings, timings);
662 }
663
664 static int bcap_g_dv_timings(struct file *file, void *priv,
665 struct v4l2_dv_timings *timings)
666 {
667 struct bcap_device *bcap_dev = video_drvdata(file);
668
669 *timings = bcap_dev->dv_timings;
670 return 0;
671 }
672
673 static int bcap_s_dv_timings(struct file *file, void *priv,
674 struct v4l2_dv_timings *timings)
675 {
676 struct bcap_device *bcap_dev = video_drvdata(file);
677 int ret;
678 if (vb2_is_busy(&bcap_dev->buffer_queue))
679 return -EBUSY;
680
681 ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
682 if (ret < 0)
683 return ret;
684
685 bcap_dev->dv_timings = *timings;
686 return 0;
687 }
688
689 static int bcap_enum_input(struct file *file, void *priv,
690 struct v4l2_input *input)
691 {
692 struct bcap_device *bcap_dev = video_drvdata(file);
693 struct bfin_capture_config *config = bcap_dev->cfg;
694 int ret;
695 u32 status;
696
697 if (input->index >= config->num_inputs)
698 return -EINVAL;
699
700 *input = config->inputs[input->index];
701 /* get input status */
702 ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
703 if (!ret)
704 input->status = status;
705 return 0;
706 }
707
708 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
709 {
710 struct bcap_device *bcap_dev = video_drvdata(file);
711
712 *index = bcap_dev->cur_input;
713 return 0;
714 }
715
716 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
717 {
718 struct bcap_device *bcap_dev = video_drvdata(file);
719 struct bfin_capture_config *config = bcap_dev->cfg;
720 struct bcap_route *route;
721 int ret;
722
723 if (vb2_is_busy(&bcap_dev->buffer_queue))
724 return -EBUSY;
725
726 if (index >= config->num_inputs)
727 return -EINVAL;
728
729 route = &config->routes[index];
730 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
731 route->input, route->output, 0);
732 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
733 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
734 return ret;
735 }
736 bcap_dev->cur_input = index;
737 /* if this route has specific config, update ppi control */
738 if (route->ppi_control)
739 config->ppi_control = route->ppi_control;
740 return 0;
741 }
742
743 static int bcap_try_format(struct bcap_device *bcap,
744 struct v4l2_pix_format *pixfmt,
745 struct bcap_format *bcap_fmt)
746 {
747 struct bcap_format *sf = bcap->sensor_formats;
748 struct bcap_format *fmt = NULL;
749 struct v4l2_mbus_framefmt mbus_fmt;
750 int ret, i;
751
752 for (i = 0; i < bcap->num_sensor_formats; i++) {
753 fmt = &sf[i];
754 if (pixfmt->pixelformat == fmt->pixelformat)
755 break;
756 }
757 if (i == bcap->num_sensor_formats)
758 fmt = &sf[0];
759
760 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
761 ret = v4l2_subdev_call(bcap->sd, video,
762 try_mbus_fmt, &mbus_fmt);
763 if (ret < 0)
764 return ret;
765 v4l2_fill_pix_format(pixfmt, &mbus_fmt);
766 if (bcap_fmt) {
767 for (i = 0; i < bcap->num_sensor_formats; i++) {
768 fmt = &sf[i];
769 if (mbus_fmt.code == fmt->mbus_code)
770 break;
771 }
772 *bcap_fmt = *fmt;
773 }
774 pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
775 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
776 return 0;
777 }
778
779 static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
780 struct v4l2_fmtdesc *fmt)
781 {
782 struct bcap_device *bcap_dev = video_drvdata(file);
783 struct bcap_format *sf = bcap_dev->sensor_formats;
784
785 if (fmt->index >= bcap_dev->num_sensor_formats)
786 return -EINVAL;
787
788 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
789 strlcpy(fmt->description,
790 sf[fmt->index].desc,
791 sizeof(fmt->description));
792 fmt->pixelformat = sf[fmt->index].pixelformat;
793 return 0;
794 }
795
796 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
797 struct v4l2_format *fmt)
798 {
799 struct bcap_device *bcap_dev = video_drvdata(file);
800 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
801
802 return bcap_try_format(bcap_dev, pixfmt, NULL);
803 }
804
805 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
806 struct v4l2_format *fmt)
807 {
808 struct bcap_device *bcap_dev = video_drvdata(file);
809
810 fmt->fmt.pix = bcap_dev->fmt;
811 return 0;
812 }
813
814 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
815 struct v4l2_format *fmt)
816 {
817 struct bcap_device *bcap_dev = video_drvdata(file);
818 struct v4l2_mbus_framefmt mbus_fmt;
819 struct bcap_format bcap_fmt;
820 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
821 int ret;
822
823 if (vb2_is_busy(&bcap_dev->buffer_queue))
824 return -EBUSY;
825
826 /* see if format works */
827 ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
828 if (ret < 0)
829 return ret;
830
831 v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
832 ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
833 if (ret < 0)
834 return ret;
835 bcap_dev->fmt = *pixfmt;
836 bcap_dev->bpp = bcap_fmt.bpp;
837 bcap_dev->dlen = bcap_fmt.dlen;
838 return 0;
839 }
840
841 static int bcap_querycap(struct file *file, void *priv,
842 struct v4l2_capability *cap)
843 {
844 struct bcap_device *bcap_dev = video_drvdata(file);
845
846 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
847 strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
848 strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
849 strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
850 return 0;
851 }
852
853 static int bcap_g_parm(struct file *file, void *fh,
854 struct v4l2_streamparm *a)
855 {
856 struct bcap_device *bcap_dev = video_drvdata(file);
857
858 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
859 return -EINVAL;
860 return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
861 }
862
863 static int bcap_s_parm(struct file *file, void *fh,
864 struct v4l2_streamparm *a)
865 {
866 struct bcap_device *bcap_dev = video_drvdata(file);
867
868 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
869 return -EINVAL;
870 return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
871 }
872
873 static int bcap_log_status(struct file *file, void *priv)
874 {
875 struct bcap_device *bcap_dev = video_drvdata(file);
876 /* status for sub devices */
877 v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
878 return 0;
879 }
880
881 static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
882 .vidioc_querycap = bcap_querycap,
883 .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap,
884 .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
885 .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap,
886 .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap,
887 .vidioc_enum_input = bcap_enum_input,
888 .vidioc_g_input = bcap_g_input,
889 .vidioc_s_input = bcap_s_input,
890 .vidioc_querystd = bcap_querystd,
891 .vidioc_s_std = bcap_s_std,
892 .vidioc_g_std = bcap_g_std,
893 .vidioc_s_dv_timings = bcap_s_dv_timings,
894 .vidioc_g_dv_timings = bcap_g_dv_timings,
895 .vidioc_query_dv_timings = bcap_query_dv_timings,
896 .vidioc_enum_dv_timings = bcap_enum_dv_timings,
897 .vidioc_reqbufs = bcap_reqbufs,
898 .vidioc_querybuf = bcap_querybuf,
899 .vidioc_qbuf = bcap_qbuf,
900 .vidioc_dqbuf = bcap_dqbuf,
901 .vidioc_streamon = bcap_streamon,
902 .vidioc_streamoff = bcap_streamoff,
903 .vidioc_g_parm = bcap_g_parm,
904 .vidioc_s_parm = bcap_s_parm,
905 .vidioc_log_status = bcap_log_status,
906 };
907
908 static struct v4l2_file_operations bcap_fops = {
909 .owner = THIS_MODULE,
910 .open = bcap_open,
911 .release = bcap_release,
912 .unlocked_ioctl = video_ioctl2,
913 .mmap = bcap_mmap,
914 #ifndef CONFIG_MMU
915 .get_unmapped_area = bcap_get_unmapped_area,
916 #endif
917 .poll = bcap_poll
918 };
919
920 static int bcap_probe(struct platform_device *pdev)
921 {
922 struct bcap_device *bcap_dev;
923 struct video_device *vfd;
924 struct i2c_adapter *i2c_adap;
925 struct bfin_capture_config *config;
926 struct vb2_queue *q;
927 struct bcap_route *route;
928 int ret;
929
930 config = pdev->dev.platform_data;
931 if (!config || !config->num_inputs) {
932 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
933 return -ENODEV;
934 }
935
936 bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
937 if (!bcap_dev) {
938 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
939 return -ENOMEM;
940 }
941
942 bcap_dev->cfg = config;
943
944 bcap_dev->ppi = ppi_create_instance(config->ppi_info);
945 if (!bcap_dev->ppi) {
946 v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
947 ret = -ENODEV;
948 goto err_free_dev;
949 }
950 bcap_dev->ppi->priv = bcap_dev;
951
952 bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
953 if (IS_ERR(bcap_dev->alloc_ctx)) {
954 ret = PTR_ERR(bcap_dev->alloc_ctx);
955 goto err_free_ppi;
956 }
957
958 vfd = video_device_alloc();
959 if (!vfd) {
960 ret = -ENOMEM;
961 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
962 goto err_cleanup_ctx;
963 }
964
965 /* initialize field of video device */
966 vfd->release = video_device_release;
967 vfd->fops = &bcap_fops;
968 vfd->ioctl_ops = &bcap_ioctl_ops;
969 vfd->tvnorms = 0;
970 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
971 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
972 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
973 bcap_dev->video_dev = vfd;
974
975 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
976 if (ret) {
977 v4l2_err(pdev->dev.driver,
978 "Unable to register v4l2 device\n");
979 goto err_release_vdev;
980 }
981 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
982
983 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
984 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
985 if (ret) {
986 v4l2_err(&bcap_dev->v4l2_dev,
987 "Unable to init control handler\n");
988 goto err_unreg_v4l2;
989 }
990
991 spin_lock_init(&bcap_dev->lock);
992 /* initialize queue */
993 q = &bcap_dev->buffer_queue;
994 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
995 q->io_modes = VB2_MMAP;
996 q->drv_priv = bcap_dev;
997 q->buf_struct_size = sizeof(struct bcap_buffer);
998 q->ops = &bcap_video_qops;
999 q->mem_ops = &vb2_dma_contig_memops;
1000 q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1001
1002 ret = vb2_queue_init(q);
1003 if (ret)
1004 goto err_free_handler;
1005
1006 mutex_init(&bcap_dev->mutex);
1007 init_completion(&bcap_dev->comp);
1008
1009 /* init video dma queues */
1010 INIT_LIST_HEAD(&bcap_dev->dma_queue);
1011
1012 vfd->lock = &bcap_dev->mutex;
1013
1014 /* register video device */
1015 ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1016 if (ret) {
1017 v4l2_err(&bcap_dev->v4l2_dev,
1018 "Unable to register video device\n");
1019 goto err_free_handler;
1020 }
1021 video_set_drvdata(bcap_dev->video_dev, bcap_dev);
1022 v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
1023 video_device_node_name(vfd));
1024
1025 /* load up the subdevice */
1026 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1027 if (!i2c_adap) {
1028 v4l2_err(&bcap_dev->v4l2_dev,
1029 "Unable to find i2c adapter\n");
1030 ret = -ENODEV;
1031 goto err_unreg_vdev;
1032
1033 }
1034 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1035 i2c_adap,
1036 &config->board_info,
1037 NULL);
1038 if (bcap_dev->sd) {
1039 int i;
1040
1041 /* update tvnorms from the sub devices */
1042 for (i = 0; i < config->num_inputs; i++)
1043 vfd->tvnorms |= config->inputs[i].std;
1044 } else {
1045 v4l2_err(&bcap_dev->v4l2_dev,
1046 "Unable to register sub device\n");
1047 ret = -ENODEV;
1048 goto err_unreg_vdev;
1049 }
1050
1051 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1052
1053 /*
1054 * explicitly set input, otherwise some boards
1055 * may not work at the state as we expected
1056 */
1057 route = &config->routes[0];
1058 ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
1059 route->input, route->output, 0);
1060 if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
1061 v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
1062 goto err_unreg_vdev;
1063 }
1064 bcap_dev->cur_input = 0;
1065 /* if this route has specific config, update ppi control */
1066 if (route->ppi_control)
1067 config->ppi_control = route->ppi_control;
1068
1069 /* now we can probe the default state */
1070 if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1071 v4l2_std_id std;
1072 ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
1073 if (ret) {
1074 v4l2_err(&bcap_dev->v4l2_dev,
1075 "Unable to get std\n");
1076 goto err_unreg_vdev;
1077 }
1078 bcap_dev->std = std;
1079 }
1080 if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
1081 struct v4l2_dv_timings dv_timings;
1082 ret = v4l2_subdev_call(bcap_dev->sd, video,
1083 g_dv_timings, &dv_timings);
1084 if (ret) {
1085 v4l2_err(&bcap_dev->v4l2_dev,
1086 "Unable to get dv timings\n");
1087 goto err_unreg_vdev;
1088 }
1089 bcap_dev->dv_timings = dv_timings;
1090 }
1091 ret = bcap_init_sensor_formats(bcap_dev);
1092 if (ret) {
1093 v4l2_err(&bcap_dev->v4l2_dev,
1094 "Unable to create sensor formats table\n");
1095 goto err_unreg_vdev;
1096 }
1097 return 0;
1098 err_unreg_vdev:
1099 video_unregister_device(bcap_dev->video_dev);
1100 bcap_dev->video_dev = NULL;
1101 err_free_handler:
1102 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1103 err_unreg_v4l2:
1104 v4l2_device_unregister(&bcap_dev->v4l2_dev);
1105 err_release_vdev:
1106 if (bcap_dev->video_dev)
1107 video_device_release(bcap_dev->video_dev);
1108 err_cleanup_ctx:
1109 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1110 err_free_ppi:
1111 ppi_delete_instance(bcap_dev->ppi);
1112 err_free_dev:
1113 kfree(bcap_dev);
1114 return ret;
1115 }
1116
1117 static int bcap_remove(struct platform_device *pdev)
1118 {
1119 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1120 struct bcap_device *bcap_dev = container_of(v4l2_dev,
1121 struct bcap_device, v4l2_dev);
1122
1123 bcap_free_sensor_formats(bcap_dev);
1124 video_unregister_device(bcap_dev->video_dev);
1125 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1126 v4l2_device_unregister(v4l2_dev);
1127 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1128 ppi_delete_instance(bcap_dev->ppi);
1129 kfree(bcap_dev);
1130 return 0;
1131 }
1132
1133 static struct platform_driver bcap_driver = {
1134 .driver = {
1135 .name = CAPTURE_DRV_NAME,
1136 .owner = THIS_MODULE,
1137 },
1138 .probe = bcap_probe,
1139 .remove = bcap_remove,
1140 };
1141 module_platform_driver(bcap_driver);
1142
1143 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1144 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1145 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support