M7350/kernel/drivers/media/video/blackfin/bfin_capture.c

1060 lines
27 KiB
C
Raw Normal View History

2024-09-09 08:52:07 +00:00
/*
* 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-chip-ident.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"
#define BCAP_MIN_NUM_BUF 2
struct bcap_format {
char *desc;
u32 pixelformat;
enum v4l2_mbus_pixelcode mbus_code;
int bpp; /* bits per pixel */
};
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;
/* used to store pixel format */
struct v4l2_pix_format fmt;
/* bits per pixel*/
int bpp;
/* 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;
/* pointing to next video buffer */
struct bcap_buffer *next_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;
};
struct bcap_fh {
struct v4l2_fh fh;
/* indicates whether this file handle is doing IO */
bool io_allowed;
};
static const struct bcap_format bcap_formats[] = {
{
.desc = "YCbCr 4:2:2 Interleaved UYVY",
.pixelformat = V4L2_PIX_FMT_UYVY,
.mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
.bpp = 16,
},
{
.desc = "YCbCr 4:2:2 Interleaved YUYV",
.pixelformat = V4L2_PIX_FMT_YUYV,
.mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
.bpp = 16,
},
{
.desc = "RGB 565",
.pixelformat = V4L2_PIX_FMT_RGB565,
.mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE,
.bpp = 16,
},
{
.desc = "RGB 444",
.pixelformat = V4L2_PIX_FMT_RGB444,
.mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
.bpp = 16,
},
};
#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)
{
enum v4l2_mbus_pixelcode 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_open(struct file *file)
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct video_device *vfd = bcap_dev->video_dev;
struct bcap_fh *bcap_fh;
if (!bcap_dev->sd) {
v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
return -ENODEV;
}
bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
if (!bcap_fh) {
v4l2_err(&bcap_dev->v4l2_dev,
"unable to allocate memory for file handle object\n");
return -ENOMEM;
}
v4l2_fh_init(&bcap_fh->fh, vfd);
/* store pointer to v4l2_fh in private_data member of file */
file->private_data = &bcap_fh->fh;
v4l2_fh_add(&bcap_fh->fh);
bcap_fh->io_allowed = false;
return 0;
}
static int bcap_release(struct file *file)
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct v4l2_fh *fh = file->private_data;
struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
/* if this instance is doing IO */
if (bcap_fh->io_allowed)
vb2_queue_release(&bcap_dev->buffer_queue);
file->private_data = NULL;
v4l2_fh_del(&bcap_fh->fh);
v4l2_fh_exit(&bcap_fh->fh);
kfree(bcap_fh);
return 0;
}
static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
{
struct bcap_device *bcap_dev = video_drvdata(file);
return vb2_mmap(&bcap_dev->buffer_queue, vma);
}
#ifndef CONFIG_MMU
static unsigned long bcap_get_unmapped_area(struct file *file,
unsigned long addr,
unsigned long len,
unsigned long pgoff,
unsigned long flags)
{
struct bcap_device *bcap_dev = video_drvdata(file);
return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
addr,
len,
pgoff,
flags);
}
#endif
static unsigned int bcap_poll(struct file *file, poll_table *wait)
{
struct bcap_device *bcap_dev = video_drvdata(file);
return vb2_poll(&bcap_dev->buffer_queue, file, wait);
}
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 (*nbuffers < BCAP_MIN_NUM_BUF)
*nbuffers = BCAP_MIN_NUM_BUF;
*nplanes = 1;
sizes[0] = bcap_dev->fmt.sizeimage;
alloc_ctxs[0] = bcap_dev->alloc_ctx;
return 0;
}
static int bcap_buffer_init(struct vb2_buffer *vb)
{
struct bcap_buffer *buf = to_bcap_vb(vb);
INIT_LIST_HEAD(&buf->list);
return 0;
}
static int bcap_buffer_prepare(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 size;
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(&buf->vb, 0, size);
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 void bcap_lock(struct vb2_queue *vq)
{
struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
mutex_lock(&bcap_dev->mutex);
}
static void bcap_unlock(struct vb2_queue *vq)
{
struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
mutex_unlock(&bcap_dev->mutex);
}
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 ppi_params params;
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");
return ret;
}
/* set ppi params */
params.width = bcap_dev->fmt.width;
params.height = bcap_dev->fmt.height;
params.bpp = bcap_dev->bpp;
params.ppi_control = bcap_dev->cfg->ppi_control;
params.int_mask = bcap_dev->cfg->int_mask;
params.blank_clocks = bcap_dev->cfg->blank_clocks;
ret = ppi->ops->set_params(ppi, &params);
if (ret < 0) {
v4l2_err(&bcap_dev->v4l2_dev,
"Error in setting ppi params\n");
return ret;
}
/* 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");
return ret;
}
INIT_COMPLETION(bcap_dev->comp);
bcap_dev->stop = false;
return 0;
}
static int 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;
if (!vb2_is_streaming(vq))
return 0;
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 */
while (!list_empty(&bcap_dev->dma_queue)) {
bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
struct bcap_buffer, list);
list_del(&bcap_dev->next_frm->list);
vb2_buffer_done(&bcap_dev->next_frm->vb, VB2_BUF_STATE_ERROR);
}
return 0;
}
static struct vb2_ops bcap_video_qops = {
.queue_setup = bcap_queue_setup,
.buf_init = bcap_buffer_init,
.buf_prepare = bcap_buffer_prepare,
.buf_cleanup = bcap_buffer_cleanup,
.buf_queue = bcap_buffer_queue,
.wait_prepare = bcap_unlock,
.wait_finish = bcap_lock,
.start_streaming = bcap_start_streaming,
.stop_streaming = bcap_stop_streaming,
};
static int bcap_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *req_buf)
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct vb2_queue *vq = &bcap_dev->buffer_queue;
struct v4l2_fh *fh = file->private_data;
struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
if (vb2_is_busy(vq))
return -EBUSY;
bcap_fh->io_allowed = true;
return vb2_reqbufs(vq, req_buf);
}
static int bcap_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct bcap_device *bcap_dev = video_drvdata(file);
return vb2_querybuf(&bcap_dev->buffer_queue, buf);
}
static int bcap_qbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct v4l2_fh *fh = file->private_data;
struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
if (!bcap_fh->io_allowed)
return -EBUSY;
return vb2_qbuf(&bcap_dev->buffer_queue, buf);
}
static int bcap_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct v4l2_fh *fh = file->private_data;
struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
if (!bcap_fh->io_allowed)
return -EBUSY;
return vb2_dqbuf(&bcap_dev->buffer_queue,
buf, file->f_flags & O_NONBLOCK);
}
static irqreturn_t bcap_isr(int irq, void *dev_id)
{
struct ppi_if *ppi = dev_id;
struct bcap_device *bcap_dev = ppi->priv;
struct timeval timevalue;
struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
dma_addr_t addr;
spin_lock(&bcap_dev->lock);
if (bcap_dev->cur_frm != bcap_dev->next_frm) {
do_gettimeofday(&timevalue);
vb->v4l2_buf.timestamp = timevalue;
vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
bcap_dev->cur_frm = bcap_dev->next_frm;
}
ppi->ops->stop(ppi);
if (bcap_dev->stop) {
complete(&bcap_dev->comp);
} else {
if (!list_empty(&bcap_dev->dma_queue)) {
bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
struct bcap_buffer, list);
list_del(&bcap_dev->next_frm->list);
addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->next_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_streamon(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct bcap_fh *fh = file->private_data;
struct ppi_if *ppi = bcap_dev->ppi;
dma_addr_t addr;
int ret;
if (!fh->io_allowed)
return -EBUSY;
/* call streamon to start streaming in videobuf */
ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
if (ret)
return ret;
/* if dma queue is empty, return error */
if (list_empty(&bcap_dev->dma_queue)) {
v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
ret = -EINVAL;
goto err;
}
/* get the next frame from the dma queue */
bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
struct bcap_buffer, list);
bcap_dev->cur_frm = bcap_dev->next_frm;
/* remove buffer from the dma queue */
list_del(&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:
vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
return ret;
}
static int bcap_streamoff(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct bcap_device *bcap_dev = video_drvdata(file);
struct bcap_fh *fh = file->private_data;
if (!fh->io_allowed)
return -EBUSY;
return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
}
static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
{
struct bcap_device *bcap_dev = video_drvdata(file);
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);
*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);
int ret;
if (vb2_is_busy(&bcap_dev->buffer_queue))
return -EBUSY;
ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, *std);
if (ret < 0)
return ret;
bcap_dev->std = *std;
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;
return 0;
}
static int bcap_try_format(struct bcap_device *bcap,
struct v4l2_pix_format *pixfmt,
enum v4l2_mbus_pixelcode *mbus_code,
int *bpp)
{
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];
if (mbus_code)
*mbus_code = fmt->mbus_code;
if (bpp)
*bpp = fmt->bpp;
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);
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, 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;
enum v4l2_mbus_pixelcode mbus_code;
struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
int ret, bpp;
if (vb2_is_busy(&bcap_dev->buffer_queue))
return -EBUSY;
/* see if format works */
ret = bcap_try_format(bcap_dev, pixfmt, &mbus_code, &bpp);
if (ret < 0)
return ret;
v4l2_fill_mbus_format(&mbus_fmt, pixfmt, 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 = bpp;
return 0;
}
static int bcap_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct bcap_device *bcap_dev = video_drvdata(file);
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
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_g_chip_ident(struct file *file, void *priv,
struct v4l2_dbg_chip_ident *chip)
{
struct bcap_device *bcap_dev = video_drvdata(file);
chip->ident = V4L2_IDENT_NONE;
chip->revision = 0;
if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
return -EINVAL;
return v4l2_subdev_call(bcap_dev->sd, core,
g_chip_ident, chip);
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int bcap_dbg_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct bcap_device *bcap_dev = video_drvdata(file);
return v4l2_subdev_call(bcap_dev->sd, core,
g_register, reg);
}
static int bcap_dbg_s_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct bcap_device *bcap_dev = video_drvdata(file);
return v4l2_subdev_call(bcap_dev->sd, core,
s_register, reg);
}
#endif
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_reqbufs = bcap_reqbufs,
.vidioc_querybuf = bcap_querybuf,
.vidioc_qbuf = bcap_qbuf,
.vidioc_dqbuf = bcap_dqbuf,
.vidioc_streamon = bcap_streamon,
.vidioc_streamoff = bcap_streamoff,
.vidioc_g_parm = bcap_g_parm,
.vidioc_s_parm = bcap_s_parm,
.vidioc_g_chip_ident = bcap_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = bcap_dbg_g_register,
.vidioc_s_register = bcap_dbg_s_register,
#endif
.vidioc_log_status = bcap_log_status,
};
static struct v4l2_file_operations bcap_fops = {
.owner = THIS_MODULE,
.open = bcap_open,
.release = bcap_release,
.unlocked_ioctl = video_ioctl2,
.mmap = bcap_mmap,
#ifndef CONFIG_MMU
.get_unmapped_area = bcap_get_unmapped_area,
#endif
.poll = bcap_poll
};
static int __devinit 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;
int ret;
config = pdev->dev.platform_data;
if (!config) {
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(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 = video_device_alloc();
if (!vfd) {
ret = -ENOMEM;
v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
goto err_cleanup_ctx;
}
/* initialize field of video device */
vfd->release = video_device_release;
vfd->fops = &bcap_fops;
vfd->ioctl_ops = &bcap_ioctl_ops;
vfd->tvnorms = 0;
vfd->v4l2_dev = &bcap_dev->v4l2_dev;
set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
bcap_dev->video_dev = vfd;
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_release_vdev;
}
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;
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;
vb2_queue_init(q);
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;
/* 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");
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");
goto err_unreg_vdev;
}
v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
/* now we can probe the default state */
if (vfd->tvnorms) {
v4l2_std_id std;
ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
if (ret) {
v4l2_err(&bcap_dev->v4l2_dev,
"Unable to get std\n");
goto err_unreg_vdev;
}
bcap_dev->std = std;
}
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);
bcap_dev->video_dev = NULL;
err_free_handler:
v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
err_unreg_v4l2:
v4l2_device_unregister(&bcap_dev->v4l2_dev);
err_release_vdev:
if (bcap_dev->video_dev)
video_device_release(bcap_dev->video_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 __devexit 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,
.owner = THIS_MODULE,
},
.probe = bcap_probe,
.remove = __devexit_p(bcap_remove),
};
static __init int bcap_init(void)
{
return platform_driver_register(&bcap_driver);
}
static __exit void bcap_exit(void)
{
platform_driver_unregister(&bcap_driver);
}
module_init(bcap_init);
module_exit(bcap_exit);
MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
MODULE_LICENSE("GPL v2");