static LIST_HEAD(hosts);
static LIST_HEAD(devices);
static DEFINE_MUTEX(list_lock);
-static DEFINE_MUTEX(video_lock);
-const static struct soc_camera_data_format*
-format_by_fourcc(struct soc_camera_device *icd, unsigned int fourcc)
+const struct soc_camera_data_format *soc_camera_format_by_fourcc(
+ struct soc_camera_device *icd, unsigned int fourcc)
{
unsigned int i;
return icd->formats + i;
return NULL;
}
+EXPORT_SYMBOL(soc_camera_format_by_fourcc);
-static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
+const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
+ struct soc_camera_device *icd, unsigned int fourcc)
{
- struct soc_camera_file *icf = file->private_data;
- struct soc_camera_device *icd = icf->icd;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
- enum v4l2_field field;
- const struct soc_camera_data_format *fmt;
- int ret;
+ unsigned int i;
- WARN_ON(priv != file->private_data);
+ for (i = 0; i < icd->num_user_formats; i++)
+ if (icd->user_formats[i].host_fmt->fourcc == fourcc)
+ return icd->user_formats + i;
+ return NULL;
+}
+EXPORT_SYMBOL(soc_camera_xlate_by_fourcc);
- fmt = format_by_fourcc(icd, f->fmt.pix.pixelformat);
- if (!fmt) {
- dev_dbg(&icd->dev, "invalid format 0x%08x\n",
- f->fmt.pix.pixelformat);
- return -EINVAL;
- }
+/**
+ * soc_camera_apply_sensor_flags() - apply platform SOCAM_SENSOR_INVERT_* flags
+ * @icl: camera platform parameters
+ * @flags: flags to be inverted according to platform configuration
+ * @return: resulting flags
+ */
+unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl,
+ unsigned long flags)
+{
+ unsigned long f;
- dev_dbg(&icd->dev, "fmt: 0x%08x\n", fmt->fourcc);
+ /* If only one of the two polarities is supported, switch to the opposite */
+ if (icl->flags & SOCAM_SENSOR_INVERT_HSYNC) {
+ f = flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
+ if (f == SOCAM_HSYNC_ACTIVE_HIGH || f == SOCAM_HSYNC_ACTIVE_LOW)
+ flags ^= SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW;
+ }
- field = f->fmt.pix.field;
+ if (icl->flags & SOCAM_SENSOR_INVERT_VSYNC) {
+ f = flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
+ if (f == SOCAM_VSYNC_ACTIVE_HIGH || f == SOCAM_VSYNC_ACTIVE_LOW)
+ flags ^= SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW;
+ }
- if (field == V4L2_FIELD_ANY) {
- field = V4L2_FIELD_NONE;
- } else if (V4L2_FIELD_NONE != field) {
- dev_err(&icd->dev, "Field type invalid.\n");
- return -EINVAL;
+ if (icl->flags & SOCAM_SENSOR_INVERT_PCLK) {
+ f = flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
+ if (f == SOCAM_PCLK_SAMPLE_RISING || f == SOCAM_PCLK_SAMPLE_FALLING)
+ flags ^= SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING;
}
- /* test physical bus parameters */
- ret = ici->ops->try_bus_param(icd, f->fmt.pix.pixelformat);
- if (ret)
- return ret;
+ return flags;
+}
+EXPORT_SYMBOL(soc_camera_apply_sensor_flags);
- /* limit format to hardware capabilities */
- ret = ici->ops->try_fmt_cap(icd, f);
+static int soc_camera_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct soc_camera_file *icf = file->private_data;
+ struct soc_camera_device *icd = icf->icd;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
- /* calculate missing fields */
- f->fmt.pix.field = field;
- f->fmt.pix.bytesperline =
- (f->fmt.pix.width * fmt->depth) >> 3;
- f->fmt.pix.sizeimage =
- f->fmt.pix.height * f->fmt.pix.bytesperline;
+ WARN_ON(priv != file->private_data);
- return ret;
+ /* limit format to hardware capabilities */
+ return ici->ops->try_fmt(icd, f);
}
static int soc_camera_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
+ struct soc_camera_file *icf = file->private_data;
+ struct soc_camera_device *icd = icf->icd;
+ int ret = 0;
+
if (inp->index != 0)
return -EINVAL;
- inp->type = V4L2_INPUT_TYPE_CAMERA;
- inp->std = V4L2_STD_UNKNOWN;
- strcpy(inp->name, "Camera");
+ if (icd->ops->enum_input)
+ ret = icd->ops->enum_input(icd, inp);
+ else {
+ /* default is camera */
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+ inp->std = V4L2_STD_UNKNOWN;
+ strcpy(inp->name, "Camera");
+ }
- return 0;
+ return ret;
}
static int soc_camera_g_input(struct file *file, void *priv, unsigned int *i)
static int soc_camera_s_std(struct file *file, void *priv, v4l2_std_id *a)
{
- return 0;
+ struct soc_camera_file *icf = file->private_data;
+ struct soc_camera_device *icd = icf->icd;
+ int ret = 0;
+
+ if (icd->ops->set_std)
+ ret = icd->ops->set_std(icd, a);
+
+ return ret;
}
static int soc_camera_reqbufs(struct file *file, void *priv,
int ret;
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
WARN_ON(priv != file->private_data);
return videobuf_dqbuf(&icf->vb_vidq, p, file->f_flags & O_NONBLOCK);
}
-static int soc_camera_open(struct inode *inode, struct file *file)
+static int soc_camera_init_user_formats(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ int i, fmts = 0;
+
+ if (!ici->ops->get_formats)
+ /*
+ * Fallback mode - the host will have to serve all
+ * sensor-provided formats one-to-one to the user
+ */
+ fmts = icd->num_formats;
+ else
+ /*
+ * First pass - only count formats this host-sensor
+ * configuration can provide
+ */
+ for (i = 0; i < icd->num_formats; i++)
+ fmts += ici->ops->get_formats(icd, i, NULL);
+
+ if (!fmts)
+ return -ENXIO;
+
+ icd->user_formats =
+ vmalloc(fmts * sizeof(struct soc_camera_format_xlate));
+ if (!icd->user_formats)
+ return -ENOMEM;
+
+ icd->num_user_formats = fmts;
+ fmts = 0;
+
+ dev_dbg(&icd->dev, "Found %d supported formats.\n", fmts);
+
+ /* Second pass - actually fill data formats */
+ for (i = 0; i < icd->num_formats; i++)
+ if (!ici->ops->get_formats) {
+ icd->user_formats[i].host_fmt = icd->formats + i;
+ icd->user_formats[i].cam_fmt = icd->formats + i;
+ icd->user_formats[i].buswidth = icd->formats[i].depth;
+ } else {
+ fmts += ici->ops->get_formats(icd, i,
+ &icd->user_formats[fmts]);
+ }
+
+ icd->current_fmt = icd->user_formats[0].host_fmt;
+
+ return 0;
+}
+
+static void soc_camera_free_user_formats(struct soc_camera_device *icd)
+{
+ vfree(icd->user_formats);
+}
+
+static int soc_camera_open(struct file *file)
{
struct video_device *vdev;
struct soc_camera_device *icd;
if (!icf)
return -ENOMEM;
- /* Protect against icd->remove() until we module_get() both drivers. */
- mutex_lock(&video_lock);
+ /*
+ * It is safe to dereference these pointers now as long as a user has
+ * the video device open - we are protected by the held cdev reference.
+ */
vdev = video_devdata(file);
icd = container_of(vdev->parent, struct soc_camera_device, dev);
goto emgi;
}
+ /* Protect against icd->remove() until we module_get() both drivers. */
+ mutex_lock(&icd->video_lock);
+
icf->icd = icd;
icd->use_count++;
/* Now we really have to activate the camera */
if (icd->use_count == 1) {
+ ret = soc_camera_init_user_formats(icd);
+ if (ret < 0)
+ goto eiufmt;
ret = ici->ops->add(icd);
if (ret < 0) {
dev_err(&icd->dev, "Couldn't activate the camera: %d\n", ret);
- icd->use_count--;
goto eiciadd;
}
}
- mutex_unlock(&video_lock);
+ mutex_unlock(&icd->video_lock);
file->private_data = icf;
dev_dbg(&icd->dev, "camera device open\n");
return 0;
- /* All errors are entered with the video_lock held */
+ /* First two errors are entered with the .video_lock held */
eiciadd:
+ soc_camera_free_user_formats(icd);
+eiufmt:
+ icd->use_count--;
+ mutex_unlock(&icd->video_lock);
module_put(ici->ops->owner);
emgi:
module_put(icd->ops->owner);
emgd:
- mutex_unlock(&video_lock);
vfree(icf);
return ret;
}
-static int soc_camera_close(struct inode *inode, struct file *file)
+static int soc_camera_close(struct file *file)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct video_device *vdev = icd->vdev;
- mutex_lock(&video_lock);
+ mutex_lock(&icd->video_lock);
icd->use_count--;
- if (!icd->use_count)
+ if (!icd->use_count) {
ici->ops->remove(icd);
+ soc_camera_free_user_formats(icd);
+ }
+ mutex_unlock(&icd->video_lock);
+
module_put(icd->ops->owner);
module_put(ici->ops->owner);
- mutex_unlock(&video_lock);
vfree(icf);
}
static ssize_t soc_camera_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
+ size_t count, loff_t *ppos)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
if (list_empty(&icf->vb_vidq.stream)) {
dev_err(&icd->dev, "Trying to poll with no queued buffers!\n");
return ici->ops->poll(file, pt);
}
-
-static struct file_operations soc_camera_fops = {
+static struct v4l2_file_operations soc_camera_fops = {
.owner = THIS_MODULE,
.open = soc_camera_open,
.release = soc_camera_close,
.read = soc_camera_read,
.mmap = soc_camera_mmap,
.poll = soc_camera_poll,
- .llseek = no_llseek,
};
-
static int soc_camera_s_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
+ struct v4l2_format *f)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ __u32 pixfmt = pix->pixelformat;
int ret;
struct v4l2_rect rect;
- const static struct soc_camera_data_format *data_fmt;
WARN_ON(priv != file->private_data);
- data_fmt = format_by_fourcc(icd, f->fmt.pix.pixelformat);
- if (!data_fmt)
- return -EINVAL;
-
- /* buswidth may be further adjusted by the ici */
- icd->buswidth = data_fmt->depth;
-
- ret = soc_camera_try_fmt_vid_cap(file, icf, f);
+ ret = soc_camera_try_fmt_vid_cap(file, priv, f);
if (ret < 0)
return ret;
+ mutex_lock(&icf->vb_vidq.vb_lock);
+
+ if (videobuf_queue_is_busy(&icf->vb_vidq)) {
+ dev_err(&icd->dev, "S_FMT denied: queue busy\n");
+ ret = -EBUSY;
+ goto unlock;
+ }
+
rect.left = icd->x_current;
rect.top = icd->y_current;
- rect.width = f->fmt.pix.width;
- rect.height = f->fmt.pix.height;
- ret = ici->ops->set_fmt_cap(icd, f->fmt.pix.pixelformat, &rect);
- if (ret < 0)
- return ret;
+ rect.width = pix->width;
+ rect.height = pix->height;
+ ret = ici->ops->set_fmt(icd, pix->pixelformat, &rect);
+ if (ret < 0) {
+ goto unlock;
+ } else if (!icd->current_fmt ||
+ icd->current_fmt->fourcc != pixfmt) {
+ dev_err(&ici->dev,
+ "Host driver hasn't set up current format correctly!\n");
+ ret = -EINVAL;
+ goto unlock;
+ }
- icd->current_fmt = data_fmt;
icd->width = rect.width;
icd->height = rect.height;
- icf->vb_vidq.field = f->fmt.pix.field;
- if (V4L2_BUF_TYPE_VIDEO_CAPTURE != f->type)
+ icf->vb_vidq.field = pix->field;
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
dev_warn(&icd->dev, "Attention! Wrong buf-type %d\n",
f->type);
icd->width, icd->height);
/* set physical bus parameters */
- return ici->ops->set_bus_param(icd, f->fmt.pix.pixelformat);
+ ret = ici->ops->set_bus_param(icd, pixfmt);
+
+unlock:
+ mutex_unlock(&icf->vb_vidq.vb_lock);
+
+ return ret;
}
static int soc_camera_enum_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_fmtdesc *f)
+ struct v4l2_fmtdesc *f)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
WARN_ON(priv != file->private_data);
- if (f->index >= icd->num_formats)
+ if (f->index >= icd->num_user_formats)
return -EINVAL;
- format = &icd->formats[f->index];
+ format = icd->user_formats[f->index].host_fmt;
strlcpy(f->description, format->name, sizeof(f->description));
f->pixelformat = format->fourcc;
}
static int soc_camera_g_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
+ struct v4l2_format *f)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
WARN_ON(priv != file->private_data);
- f->fmt.pix.width = icd->width;
- f->fmt.pix.height = icd->height;
- f->fmt.pix.field = icf->vb_vidq.field;
- f->fmt.pix.pixelformat = icd->current_fmt->fourcc;
- f->fmt.pix.bytesperline =
- (f->fmt.pix.width * icd->current_fmt->depth) >> 3;
- f->fmt.pix.sizeimage =
- f->fmt.pix.height * f->fmt.pix.bytesperline;
+ pix->width = icd->width;
+ pix->height = icd->height;
+ pix->field = icf->vb_vidq.field;
+ pix->pixelformat = icd->current_fmt->fourcc;
+ pix->bytesperline = pix->width *
+ DIV_ROUND_UP(icd->current_fmt->depth, 8);
+ pix->sizeimage = pix->height * pix->bytesperline;
dev_dbg(&icd->dev, "current_fmt->fourcc: 0x%08x\n",
icd->current_fmt->fourcc);
return 0;
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
WARN_ON(priv != file->private_data);
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
+ int ret;
WARN_ON(priv != file->private_data);
if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
+ mutex_lock(&icd->video_lock);
+
icd->ops->start_capture(icd);
/* This calls buf_queue from host driver's videobuf_queue_ops */
- return videobuf_streamon(&icf->vb_vidq);
+ ret = videobuf_streamon(&icf->vb_vidq);
+
+ mutex_unlock(&icd->video_lock);
+
+ return ret;
}
static int soc_camera_streamoff(struct file *file, void *priv,
if (i != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
+ mutex_lock(&icd->video_lock);
+
/* This calls buf_release from host driver's videobuf_queue_ops for all
* remaining buffers. When the last buffer is freed, stop capture */
videobuf_streamoff(&icf->vb_vidq);
icd->ops->stop_capture(icd);
+ mutex_unlock(&icd->video_lock);
+
return 0;
}
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
int ret;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
- ret = ici->ops->set_fmt_cap(icd, 0, &a->c);
+ /* Cropping is allowed during a running capture, guard consistency */
+ mutex_lock(&icf->vb_vidq.vb_lock);
+
+ ret = ici->ops->set_fmt(icd, 0, &a->c);
if (!ret) {
icd->width = a->c.width;
icd->height = a->c.height;
icd->y_current = a->c.top;
}
+ mutex_unlock(&icf->vb_vidq.vb_lock);
+
return ret;
}
static int soc_camera_g_chip_ident(struct file *file, void *fh,
- struct v4l2_chip_ident *id)
+ struct v4l2_dbg_chip_ident *id)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int soc_camera_g_register(struct file *file, void *fh,
- struct v4l2_register *reg)
+ struct v4l2_dbg_register *reg)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
}
static int soc_camera_s_register(struct file *file, void *fh,
- struct v4l2_register *reg)
+ struct v4l2_dbg_register *reg)
{
struct soc_camera_file *icf = file->private_data;
struct soc_camera_device *icd = icf->icd;
static int soc_camera_probe(struct device *dev)
{
struct soc_camera_device *icd = to_soc_camera_dev(dev);
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
int ret;
- if (!icd->ops->probe)
- return -ENODEV;
+ /*
+ * Possible race scenario:
+ * modprobe <camera-host-driver> triggers __func__
+ * at this moment respective <camera-sensor-driver> gets rmmod'ed
+ * to protect take module references.
+ */
+
+ if (!try_module_get(icd->ops->owner)) {
+ dev_err(&icd->dev, "Couldn't lock sensor driver.\n");
+ ret = -EINVAL;
+ goto emgd;
+ }
+
+ if (!try_module_get(ici->ops->owner)) {
+ dev_err(&icd->dev, "Couldn't lock capture bus driver.\n");
+ ret = -EINVAL;
+ goto emgi;
+ }
+
+ mutex_lock(&icd->video_lock);
/* We only call ->add() here to activate and probe the camera.
* We shall ->remove() and deactivate it immediately afterwards. */
ret = ici->ops->add(icd);
if (ret < 0)
- return ret;
+ goto eiadd;
ret = icd->ops->probe(icd);
if (ret >= 0) {
}
ici->ops->remove(icd);
+eiadd:
+ mutex_unlock(&icd->video_lock);
+ module_put(ici->ops->owner);
+emgi:
+ module_put(icd->ops->owner);
+emgd:
return ret;
}
int ret;
struct soc_camera_host *ix;
- if (!ici->ops->init_videobuf || !ici->ops->add || !ici->ops->remove)
+ if (!ici || !ici->ops ||
+ !ici->ops->try_fmt ||
+ !ici->ops->set_fmt ||
+ !ici->ops->set_bus_param ||
+ !ici->ops->querycap ||
+ !ici->ops->init_videobuf ||
+ !ici->ops->reqbufs ||
+ !ici->ops->add ||
+ !ici->ops->remove ||
+ !ici->ops->poll)
return -EINVAL;
/* Number might be equal to the platform device ID */
- sprintf(ici->dev.bus_id, "camera_host%d", ici->nr);
+ dev_set_name(&ici->dev, "camera_host%d", ici->nr);
mutex_lock(&list_lock);
list_for_each_entry(ix, &hosts, list) {
struct soc_camera_device *ix;
int num = -1, i;
- if (!icd)
+ if (!icd || !icd->ops ||
+ !icd->ops->probe ||
+ !icd->ops->init ||
+ !icd->ops->release ||
+ !icd->ops->start_capture ||
+ !icd->ops->stop_capture ||
+ !icd->ops->set_fmt ||
+ !icd->ops->try_fmt ||
+ !icd->ops->query_bus_param ||
+ !icd->ops->set_bus_param)
return -EINVAL;
for (i = 0; i < 256 && num < 0; i++) {
icd->devnum = num;
icd->dev.bus = &soc_camera_bus_type;
- snprintf(icd->dev.bus_id, sizeof(icd->dev.bus_id),
- "%u-%u", icd->iface, icd->devnum);
+ dev_set_name(&icd->dev, "%u-%u", icd->iface, icd->devnum);
- icd->dev.release = dummy_release;
+ icd->dev.release = dummy_release;
+ icd->use_count = 0;
+ icd->host_priv = NULL;
+ mutex_init(&icd->video_lock);
return scan_add_device(icd);
}
#endif
};
+/*
+ * Usually called from the struct soc_camera_ops .probe() method, i.e., from
+ * soc_camera_probe() above with .video_lock held
+ */
int soc_camera_video_start(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
dev_dbg(&ici->dev, "Allocated video_device %p\n", vdev);
strlcpy(vdev->name, ici->drv_name, sizeof(vdev->name));
- /* Maybe better &ici->dev */
+
vdev->parent = &icd->dev;
vdev->current_norm = V4L2_STD_UNKNOWN;
vdev->fops = &soc_camera_fops;
vdev->minor = -1;
vdev->tvnorms = V4L2_STD_UNKNOWN,
- icd->current_fmt = &icd->formats[0];
-
err = video_register_device(vdev, VFL_TYPE_GRABBER, vdev->minor);
if (err < 0) {
dev_err(vdev->parent, "video_register_device failed\n");
if (!icd->dev.parent || !vdev)
return;
- mutex_lock(&video_lock);
+ mutex_lock(&icd->video_lock);
video_unregister_device(vdev);
icd->vdev = NULL;
- mutex_unlock(&video_lock);
+ mutex_unlock(&icd->video_lock);
}
EXPORT_SYMBOL(soc_camera_video_stop);
projects / linux-2.6-omap-h63xx.git / blobdiff