2 * Analog Devices video capture driver
4 * Copyright (c) 2011 Analog Devices Inc.
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.
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.
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.
20 #include <linux/completion.h>
21 #include <linux/delay.h>
22 #include <linux/errno.h>
24 #include <linux/i2c.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.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>
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>
43 #include <media/blackfin/bfin_capture.h>
44 #include <media/blackfin/ppi.h>
46 #define CAPTURE_DRV_NAME "bfin_capture"
47 #define BCAP_MIN_NUM_BUF 2
53 int bpp; /* bits per pixel */
54 int dlen; /* data length for ppi in bits */
59 struct list_head list;
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;
72 struct bfin_capture_config *cfg;
76 unsigned int cur_input;
77 /* current selected standard */
79 /* current selected dv_timings */
80 struct v4l2_dv_timings dv_timings;
81 /* used to store pixel format */
82 struct v4l2_pix_format fmt;
85 /* data length for ppi in bits */
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 */
101 /* used to access capture device */
103 /* used to wait ppi to complete one transfer */
104 struct completion comp;
105 /* prepare to stop */
111 /* indicates whether this file handle is doing IO */
115 static const struct bcap_format bcap_formats[] = {
117 .desc = "YCbCr 4:2:2 Interleaved UYVY",
118 .pixelformat = V4L2_PIX_FMT_UYVY,
119 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
124 .desc = "YCbCr 4:2:2 Interleaved YUYV",
125 .pixelformat = V4L2_PIX_FMT_YUYV,
126 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
131 .desc = "YCbCr 4:2:2 Interleaved UYVY",
132 .pixelformat = V4L2_PIX_FMT_UYVY,
133 .mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
139 .pixelformat = V4L2_PIX_FMT_RGB565,
140 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
146 .pixelformat = V4L2_PIX_FMT_RGB444,
147 .mbus_code = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
153 #define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
155 static irqreturn_t bcap_isr(int irq, void *dev_id);
157 static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
159 return container_of(vb, struct bcap_buffer, vb);
162 static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
165 struct bcap_format *sf;
166 unsigned int num_formats = 0;
169 while (!v4l2_subdev_call(bcap_dev->sd, video,
170 enum_mbus_fmt, num_formats, &code))
175 sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
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)
185 if (j == BCAP_MAX_FMTS) {
186 /* we don't allow this sensor working with our bridge */
190 sf[i] = bcap_formats[j];
192 bcap_dev->sensor_formats = sf;
193 bcap_dev->num_sensor_formats = num_formats;
197 static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
199 bcap_dev->num_sensor_formats = 0;
200 kfree(bcap_dev->sensor_formats);
201 bcap_dev->sensor_formats = NULL;
204 static int bcap_open(struct file *file)
206 struct bcap_device *bcap_dev = video_drvdata(file);
207 struct video_device *vfd = bcap_dev->video_dev;
208 struct bcap_fh *bcap_fh;
211 v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
215 bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
217 v4l2_err(&bcap_dev->v4l2_dev,
218 "unable to allocate memory for file handle object\n");
222 v4l2_fh_init(&bcap_fh->fh, vfd);
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;
231 static int bcap_release(struct file *file)
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);
237 /* if this instance is doing IO */
238 if (bcap_fh->io_allowed)
239 vb2_queue_release(&bcap_dev->buffer_queue);
241 file->private_data = NULL;
242 v4l2_fh_del(&bcap_fh->fh);
243 v4l2_fh_exit(&bcap_fh->fh);
248 static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
250 struct bcap_device *bcap_dev = video_drvdata(file);
253 if (mutex_lock_interruptible(&bcap_dev->mutex))
255 ret = vb2_mmap(&bcap_dev->buffer_queue, vma);
256 mutex_unlock(&bcap_dev->mutex);
261 static unsigned long bcap_get_unmapped_area(struct file *file,
267 struct bcap_device *bcap_dev = video_drvdata(file);
269 return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
277 static unsigned int bcap_poll(struct file *file, poll_table *wait)
279 struct bcap_device *bcap_dev = video_drvdata(file);
282 mutex_lock(&bcap_dev->mutex);
283 res = vb2_poll(&bcap_dev->buffer_queue, file, wait);
284 mutex_unlock(&bcap_dev->mutex);
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[])
293 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
295 if (*nbuffers < BCAP_MIN_NUM_BUF)
296 *nbuffers = BCAP_MIN_NUM_BUF;
299 sizes[0] = bcap_dev->fmt.sizeimage;
300 alloc_ctxs[0] = bcap_dev->alloc_ctx;
305 static int bcap_buffer_init(struct vb2_buffer *vb)
307 struct bcap_buffer *buf = to_bcap_vb(vb);
309 INIT_LIST_HEAD(&buf->list);
313 static int bcap_buffer_prepare(struct vb2_buffer *vb)
315 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
316 struct bcap_buffer *buf = to_bcap_vb(vb);
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);
325 vb2_set_plane_payload(&buf->vb, 0, size);
330 static void bcap_buffer_queue(struct vb2_buffer *vb)
332 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
333 struct bcap_buffer *buf = to_bcap_vb(vb);
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);
341 static void bcap_buffer_cleanup(struct vb2_buffer *vb)
343 struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
344 struct bcap_buffer *buf = to_bcap_vb(vb);
347 spin_lock_irqsave(&bcap_dev->lock, flags);
348 list_del_init(&buf->list);
349 spin_unlock_irqrestore(&bcap_dev->lock, flags);
352 static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
354 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
355 struct ppi_if *ppi = bcap_dev->ppi;
356 struct ppi_params params;
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");
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;
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
385 if (bcap_dev->std & V4L2_STD_525_60) {
395 params.line = params.width + bcap_dev->cfg->blank_pixels;
396 params.frame = params.height;
398 ret = ppi->ops->set_params(ppi, ¶ms);
400 v4l2_err(&bcap_dev->v4l2_dev,
401 "Error in setting ppi params\n");
405 /* attach ppi DMA irq handler */
406 ret = ppi->ops->attach_irq(ppi, bcap_isr);
408 v4l2_err(&bcap_dev->v4l2_dev,
409 "Error in attaching interrupt handler\n");
413 reinit_completion(&bcap_dev->comp);
414 bcap_dev->stop = false;
418 static void bcap_stop_streaming(struct vb2_queue *vq)
420 struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
421 struct ppi_if *ppi = bcap_dev->ppi;
424 bcap_dev->stop = true;
425 wait_for_completion(&bcap_dev->comp);
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");
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);
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,
454 static int bcap_reqbufs(struct file *file, void *priv,
455 struct v4l2_requestbuffers *req_buf)
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);
465 bcap_fh->io_allowed = true;
467 return vb2_reqbufs(vq, req_buf);
470 static int bcap_querybuf(struct file *file, void *priv,
471 struct v4l2_buffer *buf)
473 struct bcap_device *bcap_dev = video_drvdata(file);
475 return vb2_querybuf(&bcap_dev->buffer_queue, buf);
478 static int bcap_qbuf(struct file *file, void *priv,
479 struct v4l2_buffer *buf)
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);
485 if (!bcap_fh->io_allowed)
488 return vb2_qbuf(&bcap_dev->buffer_queue, buf);
491 static int bcap_dqbuf(struct file *file, void *priv,
492 struct v4l2_buffer *buf)
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);
498 if (!bcap_fh->io_allowed)
501 return vb2_dqbuf(&bcap_dev->buffer_queue,
502 buf, file->f_flags & O_NONBLOCK);
505 static irqreturn_t bcap_isr(int irq, void *dev_id)
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;
512 spin_lock(&bcap_dev->lock);
514 if (!list_empty(&bcap_dev->dma_queue)) {
515 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
517 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
520 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
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);
526 /* clear error flag, we will get a new frame */
533 if (bcap_dev->stop) {
534 complete(&bcap_dev->comp);
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);
541 spin_unlock(&bcap_dev->lock);
546 static int bcap_streamon(struct file *file, void *priv,
547 enum v4l2_buf_type buf_type)
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;
558 /* call streamon to start streaming in videobuf */
559 ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
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");
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);
579 ppi->ops->start(ppi);
583 vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
587 static int bcap_streamoff(struct file *file, void *priv,
588 enum v4l2_buf_type buf_type)
590 struct bcap_device *bcap_dev = video_drvdata(file);
591 struct bcap_fh *fh = file->private_data;
596 return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
599 static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
601 struct bcap_device *bcap_dev = video_drvdata(file);
603 return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
606 static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
608 struct bcap_device *bcap_dev = video_drvdata(file);
610 *std = bcap_dev->std;
614 static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
616 struct bcap_device *bcap_dev = video_drvdata(file);
619 if (vb2_is_busy(&bcap_dev->buffer_queue))
622 ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
630 static int bcap_enum_dv_timings(struct file *file, void *priv,
631 struct v4l2_enum_dv_timings *timings)
633 struct bcap_device *bcap_dev = video_drvdata(file);
637 return v4l2_subdev_call(bcap_dev->sd, pad,
638 enum_dv_timings, timings);
641 static int bcap_query_dv_timings(struct file *file, void *priv,
642 struct v4l2_dv_timings *timings)
644 struct bcap_device *bcap_dev = video_drvdata(file);
646 return v4l2_subdev_call(bcap_dev->sd, video,
647 query_dv_timings, timings);
650 static int bcap_g_dv_timings(struct file *file, void *priv,
651 struct v4l2_dv_timings *timings)
653 struct bcap_device *bcap_dev = video_drvdata(file);
655 *timings = bcap_dev->dv_timings;
659 static int bcap_s_dv_timings(struct file *file, void *priv,
660 struct v4l2_dv_timings *timings)
662 struct bcap_device *bcap_dev = video_drvdata(file);
664 if (vb2_is_busy(&bcap_dev->buffer_queue))
667 ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
671 bcap_dev->dv_timings = *timings;
675 static int bcap_enum_input(struct file *file, void *priv,
676 struct v4l2_input *input)
678 struct bcap_device *bcap_dev = video_drvdata(file);
679 struct bfin_capture_config *config = bcap_dev->cfg;
683 if (input->index >= config->num_inputs)
686 *input = config->inputs[input->index];
687 /* get input status */
688 ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
690 input->status = status;
694 static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
696 struct bcap_device *bcap_dev = video_drvdata(file);
698 *index = bcap_dev->cur_input;
702 static int bcap_s_input(struct file *file, void *priv, unsigned int index)
704 struct bcap_device *bcap_dev = video_drvdata(file);
705 struct bfin_capture_config *config = bcap_dev->cfg;
706 struct bcap_route *route;
709 if (vb2_is_busy(&bcap_dev->buffer_queue))
712 if (index >= config->num_inputs)
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");
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;
729 static int bcap_try_format(struct bcap_device *bcap,
730 struct v4l2_pix_format *pixfmt,
731 struct bcap_format *bcap_fmt)
733 struct bcap_format *sf = bcap->sensor_formats;
734 struct bcap_format *fmt = NULL;
735 struct v4l2_mbus_framefmt mbus_fmt;
738 for (i = 0; i < bcap->num_sensor_formats; i++) {
740 if (pixfmt->pixelformat == fmt->pixelformat)
743 if (i == bcap->num_sensor_formats)
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);
751 v4l2_fill_pix_format(pixfmt, &mbus_fmt);
753 for (i = 0; i < bcap->num_sensor_formats; i++) {
755 if (mbus_fmt.code == fmt->mbus_code)
760 pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
761 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
765 static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
766 struct v4l2_fmtdesc *fmt)
768 struct bcap_device *bcap_dev = video_drvdata(file);
769 struct bcap_format *sf = bcap_dev->sensor_formats;
771 if (fmt->index >= bcap_dev->num_sensor_formats)
774 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
775 strlcpy(fmt->description,
777 sizeof(fmt->description));
778 fmt->pixelformat = sf[fmt->index].pixelformat;
782 static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
783 struct v4l2_format *fmt)
785 struct bcap_device *bcap_dev = video_drvdata(file);
786 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
788 return bcap_try_format(bcap_dev, pixfmt, NULL);
791 static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
792 struct v4l2_format *fmt)
794 struct bcap_device *bcap_dev = video_drvdata(file);
796 fmt->fmt.pix = bcap_dev->fmt;
800 static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
801 struct v4l2_format *fmt)
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;
809 if (vb2_is_busy(&bcap_dev->buffer_queue))
812 /* see if format works */
813 ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
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);
821 bcap_dev->fmt = *pixfmt;
822 bcap_dev->bpp = bcap_fmt.bpp;
823 bcap_dev->dlen = bcap_fmt.dlen;
827 static int bcap_querycap(struct file *file, void *priv,
828 struct v4l2_capability *cap)
830 struct bcap_device *bcap_dev = video_drvdata(file);
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));
840 static int bcap_g_parm(struct file *file, void *fh,
841 struct v4l2_streamparm *a)
843 struct bcap_device *bcap_dev = video_drvdata(file);
845 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
847 return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
850 static int bcap_s_parm(struct file *file, void *fh,
851 struct v4l2_streamparm *a)
853 struct bcap_device *bcap_dev = video_drvdata(file);
855 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
857 return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
860 static int bcap_log_status(struct file *file, void *priv)
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);
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,
895 static struct v4l2_file_operations bcap_fops = {
896 .owner = THIS_MODULE,
898 .release = bcap_release,
899 .unlocked_ioctl = video_ioctl2,
902 .get_unmapped_area = bcap_get_unmapped_area,
907 static int bcap_probe(struct platform_device *pdev)
909 struct bcap_device *bcap_dev;
910 struct video_device *vfd;
911 struct i2c_adapter *i2c_adap;
912 struct bfin_capture_config *config;
914 struct bcap_route *route;
917 config = pdev->dev.platform_data;
918 if (!config || !config->num_inputs) {
919 v4l2_err(pdev->dev.driver, "Unable to get board config\n");
923 bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
925 v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
929 bcap_dev->cfg = config;
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");
937 bcap_dev->ppi->priv = bcap_dev;
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);
945 vfd = video_device_alloc();
948 v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
949 goto err_cleanup_ctx;
952 /* initialize field of video device */
953 vfd->release = video_device_release;
954 vfd->fops = &bcap_fops;
955 vfd->ioctl_ops = &bcap_ioctl_ops;
957 vfd->v4l2_dev = &bcap_dev->v4l2_dev;
958 strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
959 bcap_dev->video_dev = vfd;
961 ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
963 v4l2_err(pdev->dev.driver,
964 "Unable to register v4l2 device\n");
965 goto err_release_vdev;
967 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
969 bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
970 ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
972 v4l2_err(&bcap_dev->v4l2_dev,
973 "Unable to init control handler\n");
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;
989 ret = vb2_queue_init(q);
991 goto err_free_handler;
993 mutex_init(&bcap_dev->mutex);
994 init_completion(&bcap_dev->comp);
996 /* init video dma queues */
997 INIT_LIST_HEAD(&bcap_dev->dma_queue);
999 vfd->lock = &bcap_dev->mutex;
1001 /* register video device */
1002 ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
1004 v4l2_err(&bcap_dev->v4l2_dev,
1005 "Unable to register video device\n");
1006 goto err_free_handler;
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));
1012 /* load up the subdevice */
1013 i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
1015 v4l2_err(&bcap_dev->v4l2_dev,
1016 "Unable to find i2c adapter\n");
1018 goto err_unreg_vdev;
1021 bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
1023 &config->board_info,
1028 /* update tvnorms from the sub devices */
1029 for (i = 0; i < config->num_inputs; i++)
1030 vfd->tvnorms |= config->inputs[i].std;
1032 v4l2_err(&bcap_dev->v4l2_dev,
1033 "Unable to register sub device\n");
1035 goto err_unreg_vdev;
1038 v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
1041 * explicitly set input, otherwise some boards
1042 * may not work at the state as we expected
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;
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;
1056 /* now we can probe the default state */
1057 if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
1059 ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
1061 v4l2_err(&bcap_dev->v4l2_dev,
1062 "Unable to get std\n");
1063 goto err_unreg_vdev;
1065 bcap_dev->std = std;
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);
1072 v4l2_err(&bcap_dev->v4l2_dev,
1073 "Unable to get dv timings\n");
1074 goto err_unreg_vdev;
1076 bcap_dev->dv_timings = dv_timings;
1078 ret = bcap_init_sensor_formats(bcap_dev);
1080 v4l2_err(&bcap_dev->v4l2_dev,
1081 "Unable to create sensor formats table\n");
1082 goto err_unreg_vdev;
1086 video_unregister_device(bcap_dev->video_dev);
1087 bcap_dev->video_dev = NULL;
1089 v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
1091 v4l2_device_unregister(&bcap_dev->v4l2_dev);
1093 if (bcap_dev->video_dev)
1094 video_device_release(bcap_dev->video_dev);
1096 vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
1098 ppi_delete_instance(bcap_dev->ppi);
1104 static int bcap_remove(struct platform_device *pdev)
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);
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);
1120 static struct platform_driver bcap_driver = {
1122 .name = CAPTURE_DRV_NAME,
1124 .probe = bcap_probe,
1125 .remove = bcap_remove,
1127 module_platform_driver(bcap_driver);
1129 MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
1130 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
1131 MODULE_LICENSE("GPL v2");