--- /dev/null
+/*
+ * Analog Devices video capture driver
+ *
+ * Copyright (c) 2011 Analog Devices Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <asm/dma.h>
+
+#include <media/blackfin/bfin_capture.h>
+#include <media/blackfin/ppi.h>
+
+#define CAPTURE_DRV_NAME "bfin_capture"
+
+struct bcap_format {
+ char *desc;
+ u32 pixelformat;
+ u32 mbus_code;
+ int bpp; /* bits per pixel */
+ int dlen; /* data length for ppi in bits */
+};
+
+struct bcap_buffer {
+ struct vb2_buffer vb;
+ struct list_head list;
+};
+
+struct bcap_device {
+ /* capture device instance */
+ struct v4l2_device v4l2_dev;
+ /* v4l2 control handler */
+ struct v4l2_ctrl_handler ctrl_handler;
+ /* device node data */
+ struct video_device video_dev;
+ /* sub device instance */
+ struct v4l2_subdev *sd;
+ /* capture config */
+ struct bfin_capture_config *cfg;
+ /* ppi interface */
+ struct ppi_if *ppi;
+ /* current input */
+ unsigned int cur_input;
+ /* current selected standard */
+ v4l2_std_id std;
+ /* current selected dv_timings */
+ struct v4l2_dv_timings dv_timings;
+ /* used to store pixel format */
+ struct v4l2_pix_format fmt;
+ /* bits per pixel*/
+ int bpp;
+ /* data length for ppi in bits */
+ int dlen;
+ /* used to store sensor supported format */
+ struct bcap_format *sensor_formats;
+ /* number of sensor formats array */
+ int num_sensor_formats;
+ /* pointing to current video buffer */
+ struct bcap_buffer *cur_frm;
+ /* buffer queue used in videobuf2 */
+ struct vb2_queue buffer_queue;
+ /* allocator-specific contexts for each plane */
+ struct vb2_alloc_ctx *alloc_ctx;
+ /* queue of filled frames */
+ struct list_head dma_queue;
+ /* used in videobuf2 callback */
+ spinlock_t lock;
+ /* used to access capture device */
+ struct mutex mutex;
+ /* used to wait ppi to complete one transfer */
+ struct completion comp;
+ /* prepare to stop */
+ bool stop;
+ /* vb2 buffer sequence counter */
+ unsigned sequence;
+};
+
+static const struct bcap_format bcap_formats[] = {
+ {
+ .desc = "YCbCr 4:2:2 Interleaved UYVY",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "YCbCr 4:2:2 Interleaved YUYV",
+ .pixelformat = V4L2_PIX_FMT_YUYV,
+ .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "YCbCr 4:2:2 Interleaved UYVY",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ .mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .bpp = 16,
+ .dlen = 16,
+ },
+ {
+ .desc = "RGB 565",
+ .pixelformat = V4L2_PIX_FMT_RGB565,
+ .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
+ .bpp = 16,
+ .dlen = 8,
+ },
+ {
+ .desc = "RGB 444",
+ .pixelformat = V4L2_PIX_FMT_RGB444,
+ .mbus_code = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
+ .bpp = 16,
+ .dlen = 8,
+ },
+
+};
+#define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
+
+static irqreturn_t bcap_isr(int irq, void *dev_id);
+
+static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
+{
+ return container_of(vb, struct bcap_buffer, vb);
+}
+
+static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
+{
+ u32 code;
+ struct bcap_format *sf;
+ unsigned int num_formats = 0;
+ int i, j;
+
+ while (!v4l2_subdev_call(bcap_dev->sd, video,
+ enum_mbus_fmt, num_formats, &code))
+ num_formats++;
+ if (!num_formats)
+ return -ENXIO;
+
+ sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
+ if (!sf)
+ return -ENOMEM;
+
+ for (i = 0; i < num_formats; i++) {
+ v4l2_subdev_call(bcap_dev->sd, video,
+ enum_mbus_fmt, i, &code);
+ for (j = 0; j < BCAP_MAX_FMTS; j++)
+ if (code == bcap_formats[j].mbus_code)
+ break;
+ if (j == BCAP_MAX_FMTS) {
+ /* we don't allow this sensor working with our bridge */
+ kfree(sf);
+ return -EINVAL;
+ }
+ sf[i] = bcap_formats[j];
+ }
+ bcap_dev->sensor_formats = sf;
+ bcap_dev->num_sensor_formats = num_formats;
+ return 0;
+}
+
+static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
+{
+ bcap_dev->num_sensor_formats = 0;
+ kfree(bcap_dev->sensor_formats);
+ bcap_dev->sensor_formats = NULL;
+}
+
+static int bcap_queue_setup(struct vb2_queue *vq,
+ const struct v4l2_format *fmt,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+
+ if (fmt && fmt->fmt.pix.sizeimage < bcap_dev->fmt.sizeimage)
+ return -EINVAL;
+
+ if (vq->num_buffers + *nbuffers < 2)
+ *nbuffers = 2;
+
+ *nplanes = 1;
+ sizes[0] = fmt ? fmt->fmt.pix.sizeimage : bcap_dev->fmt.sizeimage;
+ alloc_ctxs[0] = bcap_dev->alloc_ctx;
+
+ return 0;
+}
+
+static int bcap_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
+ unsigned long size = bcap_dev->fmt.sizeimage;
+
+ if (vb2_plane_size(vb, 0) < size) {
+ v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
+ vb2_plane_size(vb, 0), size);
+ return -EINVAL;
+ }
+ vb2_set_plane_payload(vb, 0, size);
+
+ vb->v4l2_buf.field = bcap_dev->fmt.field;
+
+ return 0;
+}
+
+static void bcap_buffer_queue(struct vb2_buffer *vb)
+{
+ struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
+ struct bcap_buffer *buf = to_bcap_vb(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&bcap_dev->lock, flags);
+ list_add_tail(&buf->list, &bcap_dev->dma_queue);
+ spin_unlock_irqrestore(&bcap_dev->lock, flags);
+}
+
+static void bcap_buffer_cleanup(struct vb2_buffer *vb)
+{
+ struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
+ struct bcap_buffer *buf = to_bcap_vb(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&bcap_dev->lock, flags);
+ list_del_init(&buf->list);
+ spin_unlock_irqrestore(&bcap_dev->lock, flags);
+}
+
+static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+ struct ppi_if *ppi = bcap_dev->ppi;
+ struct bcap_buffer *buf, *tmp;
+ struct ppi_params params;
+ dma_addr_t addr;
+ int ret;
+
+ /* enable streamon on the sub device */
+ ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
+ if (ret && (ret != -ENOIOCTLCMD)) {
+ v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
+ goto err;
+ }
+
+ /* set ppi params */
+ params.width = bcap_dev->fmt.width;
+ params.height = bcap_dev->fmt.height;
+ params.bpp = bcap_dev->bpp;
+ params.dlen = bcap_dev->dlen;
+ params.ppi_control = bcap_dev->cfg->ppi_control;
+ params.int_mask = bcap_dev->cfg->int_mask;
+ if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
+ & V4L2_IN_CAP_DV_TIMINGS) {
+ struct v4l2_bt_timings *bt = &bcap_dev->dv_timings.bt;
+
+ params.hdelay = bt->hsync + bt->hbackporch;
+ params.vdelay = bt->vsync + bt->vbackporch;
+ params.line = V4L2_DV_BT_FRAME_WIDTH(bt);
+ params.frame = V4L2_DV_BT_FRAME_HEIGHT(bt);
+ } else if (bcap_dev->cfg->inputs[bcap_dev->cur_input].capabilities
+ & V4L2_IN_CAP_STD) {
+ params.hdelay = 0;
+ params.vdelay = 0;
+ if (bcap_dev->std & V4L2_STD_525_60) {
+ params.line = 858;
+ params.frame = 525;
+ } else {
+ params.line = 864;
+ params.frame = 625;
+ }
+ } else {
+ params.hdelay = 0;
+ params.vdelay = 0;
+ params.line = params.width + bcap_dev->cfg->blank_pixels;
+ params.frame = params.height;
+ }
+ ret = ppi->ops->set_params(ppi, ¶ms);
+ if (ret < 0) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Error in setting ppi params\n");
+ goto err;
+ }
+
+ /* attach ppi DMA irq handler */
+ ret = ppi->ops->attach_irq(ppi, bcap_isr);
+ if (ret < 0) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Error in attaching interrupt handler\n");
+ goto err;
+ }
+
+ bcap_dev->sequence = 0;
+
+ reinit_completion(&bcap_dev->comp);
+ bcap_dev->stop = false;
+
+ /* get the next frame from the dma queue */
+ bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
+ struct bcap_buffer, list);
+ /* remove buffer from the dma queue */
+ list_del_init(&bcap_dev->cur_frm->list);
+ addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
+ /* update DMA address */
+ ppi->ops->update_addr(ppi, (unsigned long)addr);
+ /* enable ppi */
+ ppi->ops->start(ppi);
+
+ return 0;
+
+err:
+ list_for_each_entry_safe(buf, tmp, &bcap_dev->dma_queue, list) {
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
+ }
+
+ return ret;
+}
+
+static void bcap_stop_streaming(struct vb2_queue *vq)
+{
+ struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+ struct ppi_if *ppi = bcap_dev->ppi;
+ int ret;
+
+ bcap_dev->stop = true;
+ wait_for_completion(&bcap_dev->comp);
+ ppi->ops->stop(ppi);
+ ppi->ops->detach_irq(ppi);
+ ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
+ if (ret && (ret != -ENOIOCTLCMD))
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "stream off failed in subdev\n");
+
+ /* release all active buffers */
+ if (bcap_dev->cur_frm)
+ vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
+
+ while (!list_empty(&bcap_dev->dma_queue)) {
+ bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
+ struct bcap_buffer, list);
+ list_del_init(&bcap_dev->cur_frm->list);
+ vb2_buffer_done(&bcap_dev->cur_frm->vb, VB2_BUF_STATE_ERROR);
+ }
+}
+
+static struct vb2_ops bcap_video_qops = {
+ .queue_setup = bcap_queue_setup,
+ .buf_prepare = bcap_buffer_prepare,
+ .buf_cleanup = bcap_buffer_cleanup,
+ .buf_queue = bcap_buffer_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = bcap_start_streaming,
+ .stop_streaming = bcap_stop_streaming,
+};
+
+static irqreturn_t bcap_isr(int irq, void *dev_id)
+{
+ struct ppi_if *ppi = dev_id;
+ struct bcap_device *bcap_dev = ppi->priv;
+ struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
+ dma_addr_t addr;
+
+ spin_lock(&bcap_dev->lock);
+
+ if (!list_empty(&bcap_dev->dma_queue)) {
+ v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
+ if (ppi->err) {
+ vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
+ ppi->err = false;
+ } else {
+ vb->v4l2_buf.sequence = bcap_dev->sequence++;
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ }
+ bcap_dev->cur_frm = list_entry(bcap_dev->dma_queue.next,
+ struct bcap_buffer, list);
+ list_del_init(&bcap_dev->cur_frm->list);
+ } else {
+ /* clear error flag, we will get a new frame */
+ if (ppi->err)
+ ppi->err = false;
+ }
+
+ ppi->ops->stop(ppi);
+
+ if (bcap_dev->stop) {
+ complete(&bcap_dev->comp);
+ } else {
+ addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
+ ppi->ops->update_addr(ppi, (unsigned long)addr);
+ ppi->ops->start(ppi);
+ }
+
+ spin_unlock(&bcap_dev->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_input input;
+
+ input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+ if (!(input.capabilities & V4L2_IN_CAP_STD))
+ return -ENODATA;
+
+ return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
+}
+
+static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_input input;
+
+ input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+ if (!(input.capabilities & V4L2_IN_CAP_STD))
+ return -ENODATA;
+
+ *std = bcap_dev->std;
+ return 0;
+}
+
+static int bcap_s_std(struct file *file, void *priv, v4l2_std_id std)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_input input;
+ int ret;
+
+ input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+ if (!(input.capabilities & V4L2_IN_CAP_STD))
+ return -ENODATA;
+
+ if (vb2_is_busy(&bcap_dev->buffer_queue))
+ return -EBUSY;
+
+ ret = v4l2_subdev_call(bcap_dev->sd, video, s_std, std);
+ if (ret < 0)
+ return ret;
+
+ bcap_dev->std = std;
+ return 0;
+}
+
+static int bcap_enum_dv_timings(struct file *file, void *priv,
+ struct v4l2_enum_dv_timings *timings)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_input input;
+
+ input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+ if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+ return -ENODATA;
+
+ timings->pad = 0;
+
+ return v4l2_subdev_call(bcap_dev->sd, pad,
+ enum_dv_timings, timings);
+}
+
+static int bcap_query_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_input input;
+
+ input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+ if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+ return -ENODATA;
+
+ return v4l2_subdev_call(bcap_dev->sd, video,
+ query_dv_timings, timings);
+}
+
+static int bcap_g_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_input input;
+
+ input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+ if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+ return -ENODATA;
+
+ *timings = bcap_dev->dv_timings;
+ return 0;
+}
+
+static int bcap_s_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_input input;
+ int ret;
+
+ input = bcap_dev->cfg->inputs[bcap_dev->cur_input];
+ if (!(input.capabilities & V4L2_IN_CAP_DV_TIMINGS))
+ return -ENODATA;
+
+ if (vb2_is_busy(&bcap_dev->buffer_queue))
+ return -EBUSY;
+
+ ret = v4l2_subdev_call(bcap_dev->sd, video, s_dv_timings, timings);
+ if (ret < 0)
+ return ret;
+
+ bcap_dev->dv_timings = *timings;
+ return 0;
+}
+
+static int bcap_enum_input(struct file *file, void *priv,
+ struct v4l2_input *input)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct bfin_capture_config *config = bcap_dev->cfg;
+ int ret;
+ u32 status;
+
+ if (input->index >= config->num_inputs)
+ return -EINVAL;
+
+ *input = config->inputs[input->index];
+ /* get input status */
+ ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
+ if (!ret)
+ input->status = status;
+ return 0;
+}
+
+static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+
+ *index = bcap_dev->cur_input;
+ return 0;
+}
+
+static int bcap_s_input(struct file *file, void *priv, unsigned int index)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct bfin_capture_config *config = bcap_dev->cfg;
+ struct bcap_route *route;
+ int ret;
+
+ if (vb2_is_busy(&bcap_dev->buffer_queue))
+ return -EBUSY;
+
+ if (index >= config->num_inputs)
+ return -EINVAL;
+
+ route = &config->routes[index];
+ ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
+ route->input, route->output, 0);
+ if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
+ v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
+ return ret;
+ }
+ bcap_dev->cur_input = index;
+ /* if this route has specific config, update ppi control */
+ if (route->ppi_control)
+ config->ppi_control = route->ppi_control;
+ return 0;
+}
+
+static int bcap_try_format(struct bcap_device *bcap,
+ struct v4l2_pix_format *pixfmt,
+ struct bcap_format *bcap_fmt)
+{
+ struct bcap_format *sf = bcap->sensor_formats;
+ struct bcap_format *fmt = NULL;
+ struct v4l2_mbus_framefmt mbus_fmt;
+ int ret, i;
+
+ for (i = 0; i < bcap->num_sensor_formats; i++) {
+ fmt = &sf[i];
+ if (pixfmt->pixelformat == fmt->pixelformat)
+ break;
+ }
+ if (i == bcap->num_sensor_formats)
+ fmt = &sf[0];
+
+ v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
+ ret = v4l2_subdev_call(bcap->sd, video,
+ try_mbus_fmt, &mbus_fmt);
+ if (ret < 0)
+ return ret;
+ v4l2_fill_pix_format(pixfmt, &mbus_fmt);
+ if (bcap_fmt) {
+ for (i = 0; i < bcap->num_sensor_formats; i++) {
+ fmt = &sf[i];
+ if (mbus_fmt.code == fmt->mbus_code)
+ break;
+ }
+ *bcap_fmt = *fmt;
+ }
+ pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
+ pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
+ return 0;
+}
+
+static int bcap_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct bcap_format *sf = bcap_dev->sensor_formats;
+
+ if (fmt->index >= bcap_dev->num_sensor_formats)
+ return -EINVAL;
+
+ fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ strlcpy(fmt->description,
+ sf[fmt->index].desc,
+ sizeof(fmt->description));
+ fmt->pixelformat = sf[fmt->index].pixelformat;
+ return 0;
+}
+
+static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
+
+ return bcap_try_format(bcap_dev, pixfmt, NULL);
+}
+
+static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+
+ fmt->fmt.pix = bcap_dev->fmt;
+ return 0;
+}
+
+static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ struct v4l2_mbus_framefmt mbus_fmt;
+ struct bcap_format bcap_fmt;
+ struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
+ int ret;
+
+ if (vb2_is_busy(&bcap_dev->buffer_queue))
+ return -EBUSY;
+
+ /* see if format works */
+ ret = bcap_try_format(bcap_dev, pixfmt, &bcap_fmt);
+ if (ret < 0)
+ return ret;
+
+ v4l2_fill_mbus_format(&mbus_fmt, pixfmt, bcap_fmt.mbus_code);
+ ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
+ if (ret < 0)
+ return ret;
+ bcap_dev->fmt = *pixfmt;
+ bcap_dev->bpp = bcap_fmt.bpp;
+ bcap_dev->dlen = bcap_fmt.dlen;
+ return 0;
+}
+
+static int bcap_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
+ strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
+ strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
+ return 0;
+}
+
+static int bcap_g_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+
+ if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
+}
+
+static int bcap_s_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+
+ if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
+}
+
+static int bcap_log_status(struct file *file, void *priv)
+{
+ struct bcap_device *bcap_dev = video_drvdata(file);
+ /* status for sub devices */
+ v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
+ .vidioc_querycap = bcap_querycap,
+ .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap,
+ .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap,
+ .vidioc_enum_input = bcap_enum_input,
+ .vidioc_g_input = bcap_g_input,
+ .vidioc_s_input = bcap_s_input,
+ .vidioc_querystd = bcap_querystd,
+ .vidioc_s_std = bcap_s_std,
+ .vidioc_g_std = bcap_g_std,
+ .vidioc_s_dv_timings = bcap_s_dv_timings,
+ .vidioc_g_dv_timings = bcap_g_dv_timings,
+ .vidioc_query_dv_timings = bcap_query_dv_timings,
+ .vidioc_enum_dv_timings = bcap_enum_dv_timings,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_g_parm = bcap_g_parm,
+ .vidioc_s_parm = bcap_s_parm,
+ .vidioc_log_status = bcap_log_status,
+};
+
+static struct v4l2_file_operations bcap_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = vb2_fop_mmap,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = vb2_fop_get_unmapped_area,
+#endif
+ .poll = vb2_fop_poll
+};
+
+static int bcap_probe(struct platform_device *pdev)
+{
+ struct bcap_device *bcap_dev;
+ struct video_device *vfd;
+ struct i2c_adapter *i2c_adap;
+ struct bfin_capture_config *config;
+ struct vb2_queue *q;
+ struct bcap_route *route;
+ int ret;
+
+ config = pdev->dev.platform_data;
+ if (!config || !config->num_inputs) {
+ v4l2_err(pdev->dev.driver, "Unable to get board config\n");
+ return -ENODEV;
+ }
+
+ bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
+ if (!bcap_dev) {
+ v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
+ return -ENOMEM;
+ }
+
+ bcap_dev->cfg = config;
+
+ bcap_dev->ppi = ppi_create_instance(pdev, config->ppi_info);
+ if (!bcap_dev->ppi) {
+ v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
+ ret = -ENODEV;
+ goto err_free_dev;
+ }
+ bcap_dev->ppi->priv = bcap_dev;
+
+ bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(bcap_dev->alloc_ctx)) {
+ ret = PTR_ERR(bcap_dev->alloc_ctx);
+ goto err_free_ppi;
+ }
+
+ vfd = &bcap_dev->video_dev;
+ /* initialize field of video device */
+ vfd->release = video_device_release_empty;
+ vfd->fops = &bcap_fops;
+ vfd->ioctl_ops = &bcap_ioctl_ops;
+ vfd->tvnorms = 0;
+ vfd->v4l2_dev = &bcap_dev->v4l2_dev;
+ strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
+
+ ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
+ if (ret) {
+ v4l2_err(pdev->dev.driver,
+ "Unable to register v4l2 device\n");
+ goto err_cleanup_ctx;
+ }
+ v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
+
+ bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
+ ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
+ if (ret) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Unable to init control handler\n");
+ goto err_unreg_v4l2;
+ }
+
+ spin_lock_init(&bcap_dev->lock);
+ /* initialize queue */
+ q = &bcap_dev->buffer_queue;
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_DMABUF;
+ q->drv_priv = bcap_dev;
+ q->buf_struct_size = sizeof(struct bcap_buffer);
+ q->ops = &bcap_video_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->lock = &bcap_dev->mutex;
+ q->min_buffers_needed = 1;
+
+ ret = vb2_queue_init(q);
+ if (ret)
+ goto err_free_handler;
+
+ mutex_init(&bcap_dev->mutex);
+ init_completion(&bcap_dev->comp);
+
+ /* init video dma queues */
+ INIT_LIST_HEAD(&bcap_dev->dma_queue);
+
+ vfd->lock = &bcap_dev->mutex;
+ vfd->queue = q;
+
+ /* register video device */
+ ret = video_register_device(&bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Unable to register video device\n");
+ goto err_free_handler;
+ }
+ video_set_drvdata(&bcap_dev->video_dev, bcap_dev);
+ v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
+ video_device_node_name(vfd));
+
+ /* load up the subdevice */
+ i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
+ if (!i2c_adap) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Unable to find i2c adapter\n");
+ ret = -ENODEV;
+ goto err_unreg_vdev;
+
+ }
+ bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
+ i2c_adap,
+ &config->board_info,
+ NULL);
+ if (bcap_dev->sd) {
+ int i;
+
+ /* update tvnorms from the sub devices */
+ for (i = 0; i < config->num_inputs; i++)
+ vfd->tvnorms |= config->inputs[i].std;
+ } else {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Unable to register sub device\n");
+ ret = -ENODEV;
+ goto err_unreg_vdev;
+ }
+
+ v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
+
+ /*
+ * explicitly set input, otherwise some boards
+ * may not work at the state as we expected
+ */
+ route = &config->routes[0];
+ ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
+ route->input, route->output, 0);
+ if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
+ v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
+ goto err_unreg_vdev;
+ }
+ bcap_dev->cur_input = 0;
+ /* if this route has specific config, update ppi control */
+ if (route->ppi_control)
+ config->ppi_control = route->ppi_control;
+
+ /* now we can probe the default state */
+ if (config->inputs[0].capabilities & V4L2_IN_CAP_STD) {
+ v4l2_std_id std;
+ ret = v4l2_subdev_call(bcap_dev->sd, video, g_std, &std);
+ if (ret) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Unable to get std\n");
+ goto err_unreg_vdev;
+ }
+ bcap_dev->std = std;
+ }
+ if (config->inputs[0].capabilities & V4L2_IN_CAP_DV_TIMINGS) {
+ struct v4l2_dv_timings dv_timings;
+ ret = v4l2_subdev_call(bcap_dev->sd, video,
+ g_dv_timings, &dv_timings);
+ if (ret) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Unable to get dv timings\n");
+ goto err_unreg_vdev;
+ }
+ bcap_dev->dv_timings = dv_timings;
+ }
+ ret = bcap_init_sensor_formats(bcap_dev);
+ if (ret) {
+ v4l2_err(&bcap_dev->v4l2_dev,
+ "Unable to create sensor formats table\n");
+ goto err_unreg_vdev;
+ }
+ return 0;
+err_unreg_vdev:
+ video_unregister_device(&bcap_dev->video_dev);
+err_free_handler:
+ v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
+err_unreg_v4l2:
+ v4l2_device_unregister(&bcap_dev->v4l2_dev);
+err_cleanup_ctx:
+ vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
+err_free_ppi:
+ ppi_delete_instance(bcap_dev->ppi);
+err_free_dev:
+ kfree(bcap_dev);
+ return ret;
+}
+
+static int bcap_remove(struct platform_device *pdev)
+{
+ struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+ struct bcap_device *bcap_dev = container_of(v4l2_dev,
+ struct bcap_device, v4l2_dev);
+
+ bcap_free_sensor_formats(bcap_dev);
+ video_unregister_device(&bcap_dev->video_dev);
+ v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
+ v4l2_device_unregister(v4l2_dev);
+ vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
+ ppi_delete_instance(bcap_dev->ppi);
+ kfree(bcap_dev);
+ return 0;
+}
+
+static struct platform_driver bcap_driver = {
+ .driver = {
+ .name = CAPTURE_DRV_NAME,
+ },
+ .probe = bcap_probe,
+ .remove = bcap_remove,
+};
+module_platform_driver(bcap_driver);
+
+MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
+MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff