aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/v4l2-core/v4l2-dev.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-dev.c')
-rw-r--r--drivers/media/v4l2-core/v4l2-dev.c107
1 files changed, 64 insertions, 43 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index 5923c5dfacd..634d863c05b 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -38,24 +38,25 @@
* sysfs stuff
*/
-static ssize_t show_index(struct device *cd,
- struct device_attribute *attr, char *buf)
+static ssize_t index_show(struct device *cd,
+ struct device_attribute *attr, char *buf)
{
struct video_device *vdev = to_video_device(cd);
return sprintf(buf, "%i\n", vdev->index);
}
+static DEVICE_ATTR_RO(index);
-static ssize_t show_debug(struct device *cd,
- struct device_attribute *attr, char *buf)
+static ssize_t debug_show(struct device *cd,
+ struct device_attribute *attr, char *buf)
{
struct video_device *vdev = to_video_device(cd);
return sprintf(buf, "%i\n", vdev->debug);
}
-static ssize_t set_debug(struct device *cd, struct device_attribute *attr,
- const char *buf, size_t len)
+static ssize_t debug_store(struct device *cd, struct device_attribute *attr,
+ const char *buf, size_t len)
{
struct video_device *vdev = to_video_device(cd);
int res = 0;
@@ -68,21 +69,24 @@ static ssize_t set_debug(struct device *cd, struct device_attribute *attr,
vdev->debug = value;
return len;
}
+static DEVICE_ATTR_RW(debug);
-static ssize_t show_name(struct device *cd,
+static ssize_t name_show(struct device *cd,
struct device_attribute *attr, char *buf)
{
struct video_device *vdev = to_video_device(cd);
return sprintf(buf, "%.*s\n", (int)sizeof(vdev->name), vdev->name);
}
+static DEVICE_ATTR_RO(name);
-static struct device_attribute video_device_attrs[] = {
- __ATTR(name, S_IRUGO, show_name, NULL),
- __ATTR(debug, 0644, show_debug, set_debug),
- __ATTR(index, S_IRUGO, show_index, NULL),
- __ATTR_NULL
+static struct attribute *video_device_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_debug.attr,
+ &dev_attr_index.attr,
+ NULL,
};
+ATTRIBUTE_GROUPS(video_device);
/*
* Active devices
@@ -217,7 +221,7 @@ static void v4l2_device_release(struct device *cd)
static struct class video_class = {
.name = VIDEO_NAME,
- .dev_attrs = video_device_attrs,
+ .dev_groups = video_device_groups,
};
struct video_device *video_devdata(struct file *file)
@@ -495,8 +499,8 @@ static const struct file_operations v4l2_fops = {
};
/**
- * get_index - assign stream index number based on parent device
- * @vdev: video_device to assign index number to, vdev->parent should be assigned
+ * get_index - assign stream index number based on v4l2_dev
+ * @vdev: video_device to assign index number to, vdev->v4l2_dev should be assigned
*
* Note that when this is called the new device has not yet been registered
* in the video_device array, but it was able to obtain a minor number.
@@ -514,15 +518,11 @@ static int get_index(struct video_device *vdev)
static DECLARE_BITMAP(used, VIDEO_NUM_DEVICES);
int i;
- /* Some drivers do not set the parent. In that case always return 0. */
- if (vdev->parent == NULL)
- return 0;
-
bitmap_zero(used, VIDEO_NUM_DEVICES);
for (i = 0; i < VIDEO_NUM_DEVICES; i++) {
if (video_device[i] != NULL &&
- video_device[i]->parent == vdev->parent) {
+ video_device[i]->v4l2_dev == vdev->v4l2_dev) {
set_bit(video_device[i]->index, used);
}
}
@@ -554,6 +554,7 @@ static void determine_valid_ioctls(struct video_device *vdev)
bool is_vid = vdev->vfl_type == VFL_TYPE_GRABBER;
bool is_vbi = vdev->vfl_type == VFL_TYPE_VBI;
bool is_radio = vdev->vfl_type == VFL_TYPE_RADIO;
+ bool is_sdr = vdev->vfl_type == VFL_TYPE_SDR;
bool is_rx = vdev->vfl_dir != VFL_DIR_TX;
bool is_tx = vdev->vfl_dir != VFL_DIR_RX;
@@ -596,7 +597,6 @@ static void determine_valid_ioctls(struct video_device *vdev)
set_bit(_IOC_NR(VIDIOC_DBG_G_REGISTER), valid_ioctls);
set_bit(_IOC_NR(VIDIOC_DBG_S_REGISTER), valid_ioctls);
#endif
- SET_VALID_IOCTL(ops, VIDIOC_DBG_G_CHIP_IDENT, vidioc_g_chip_ident);
/* yes, really vidioc_subscribe_event */
SET_VALID_IOCTL(ops, VIDIOC_DQEVENT, vidioc_subscribe_event);
SET_VALID_IOCTL(ops, VIDIOC_SUBSCRIBE_EVENT, vidioc_subscribe_event);
@@ -663,9 +663,20 @@ static void determine_valid_ioctls(struct video_device *vdev)
ops->vidioc_try_fmt_sliced_vbi_out)))
set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
SET_VALID_IOCTL(ops, VIDIOC_G_SLICED_VBI_CAP, vidioc_g_sliced_vbi_cap);
+ } else if (is_sdr) {
+ /* SDR specific ioctls */
+ if (ops->vidioc_enum_fmt_sdr_cap)
+ set_bit(_IOC_NR(VIDIOC_ENUM_FMT), valid_ioctls);
+ if (ops->vidioc_g_fmt_sdr_cap)
+ set_bit(_IOC_NR(VIDIOC_G_FMT), valid_ioctls);
+ if (ops->vidioc_s_fmt_sdr_cap)
+ set_bit(_IOC_NR(VIDIOC_S_FMT), valid_ioctls);
+ if (ops->vidioc_try_fmt_sdr_cap)
+ set_bit(_IOC_NR(VIDIOC_TRY_FMT), valid_ioctls);
}
- if (!is_radio) {
- /* ioctls valid for video or vbi */
+
+ if (is_vid || is_vbi || is_sdr) {
+ /* ioctls valid for video, vbi or sdr */
SET_VALID_IOCTL(ops, VIDIOC_REQBUFS, vidioc_reqbufs);
SET_VALID_IOCTL(ops, VIDIOC_QUERYBUF, vidioc_querybuf);
SET_VALID_IOCTL(ops, VIDIOC_QBUF, vidioc_qbuf);
@@ -673,11 +684,14 @@ static void determine_valid_ioctls(struct video_device *vdev)
SET_VALID_IOCTL(ops, VIDIOC_DQBUF, vidioc_dqbuf);
SET_VALID_IOCTL(ops, VIDIOC_CREATE_BUFS, vidioc_create_bufs);
SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf);
+ }
+
+ if (is_vid || is_vbi) {
+ /* ioctls valid for video or vbi */
if (ops->vidioc_s_std)
set_bit(_IOC_NR(VIDIOC_ENUMSTD), valid_ioctls);
- if (ops->vidioc_g_std || vdev->current_norm)
- set_bit(_IOC_NR(VIDIOC_G_STD), valid_ioctls);
SET_VALID_IOCTL(ops, VIDIOC_S_STD, vidioc_s_std);
+ SET_VALID_IOCTL(ops, VIDIOC_G_STD, vidioc_g_std);
if (is_rx) {
SET_VALID_IOCTL(ops, VIDIOC_QUERYSTD, vidioc_querystd);
SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input);
@@ -687,6 +701,7 @@ static void determine_valid_ioctls(struct video_device *vdev)
SET_VALID_IOCTL(ops, VIDIOC_G_AUDIO, vidioc_g_audio);
SET_VALID_IOCTL(ops, VIDIOC_S_AUDIO, vidioc_s_audio);
SET_VALID_IOCTL(ops, VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings);
+ SET_VALID_IOCTL(ops, VIDIOC_S_EDID, vidioc_s_edid);
}
if (is_tx) {
SET_VALID_IOCTL(ops, VIDIOC_ENUMOUTPUT, vidioc_enum_output);
@@ -705,16 +720,17 @@ static void determine_valid_ioctls(struct video_device *vdev)
if (ops->vidioc_cropcap || ops->vidioc_g_selection)
set_bit(_IOC_NR(VIDIOC_CROPCAP), valid_ioctls);
if (ops->vidioc_g_parm || (vdev->vfl_type == VFL_TYPE_GRABBER &&
- (ops->vidioc_g_std || vdev->current_norm)))
+ ops->vidioc_g_std))
set_bit(_IOC_NR(VIDIOC_G_PARM), valid_ioctls);
SET_VALID_IOCTL(ops, VIDIOC_S_PARM, vidioc_s_parm);
SET_VALID_IOCTL(ops, VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings);
SET_VALID_IOCTL(ops, VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings);
SET_VALID_IOCTL(ops, VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings);
SET_VALID_IOCTL(ops, VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap);
+ SET_VALID_IOCTL(ops, VIDIOC_G_EDID, vidioc_g_edid);
}
- if (is_tx) {
- /* transmitter only ioctls */
+ if (is_tx && (is_radio || is_sdr)) {
+ /* radio transmitter only ioctls */
SET_VALID_IOCTL(ops, VIDIOC_G_MODULATOR, vidioc_g_modulator);
SET_VALID_IOCTL(ops, VIDIOC_S_MODULATOR, vidioc_s_modulator);
}
@@ -760,6 +776,8 @@ static void determine_valid_ioctls(struct video_device *vdev)
* %VFL_TYPE_RADIO - A radio card
*
* %VFL_TYPE_SUBDEV - A subdevice
+ *
+ * %VFL_TYPE_SDR - Software Defined Radio
*/
int __video_register_device(struct video_device *vdev, int type, int nr,
int warn_if_nr_in_use, struct module *owner)
@@ -777,6 +795,9 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
/* the release callback MUST be present */
if (WARN_ON(!vdev->release))
return -EINVAL;
+ /* the v4l2_dev pointer MUST be present */
+ if (WARN_ON(!vdev->v4l2_dev))
+ return -EINVAL;
/* v4l2_fh support */
spin_lock_init(&vdev->fh_lock);
@@ -796,6 +817,10 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
case VFL_TYPE_SUBDEV:
name_base = "v4l-subdev";
break;
+ case VFL_TYPE_SDR:
+ /* Use device name 'swradio' because 'sdr' was already taken. */
+ name_base = "swradio";
+ break;
default:
printk(KERN_ERR "%s called with unknown type: %d\n",
__func__, type);
@@ -804,16 +829,14 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
vdev->vfl_type = type;
vdev->cdev = NULL;
- if (vdev->v4l2_dev) {
- if (vdev->v4l2_dev->dev)
- vdev->parent = vdev->v4l2_dev->dev;
- if (vdev->ctrl_handler == NULL)
- vdev->ctrl_handler = vdev->v4l2_dev->ctrl_handler;
- /* If the prio state pointer is NULL, then use the v4l2_device
- prio state. */
- if (vdev->prio == NULL)
- vdev->prio = &vdev->v4l2_dev->prio;
- }
+ if (vdev->dev_parent == NULL)
+ vdev->dev_parent = vdev->v4l2_dev->dev;
+ if (vdev->ctrl_handler == NULL)
+ vdev->ctrl_handler = vdev->v4l2_dev->ctrl_handler;
+ /* If the prio state pointer is NULL, then use the v4l2_device
+ prio state. */
+ if (vdev->prio == NULL)
+ vdev->prio = &vdev->v4l2_dev->prio;
/* Part 2: find a free minor, device node number and device index. */
#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES
@@ -874,6 +897,7 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
/* Should not happen since we thought this minor was free */
WARN_ON(video_device[vdev->minor] != NULL);
vdev->index = get_index(vdev);
+ video_device[vdev->minor] = vdev;
mutex_unlock(&videodev_lock);
if (vdev->ioctl_ops)
@@ -898,8 +922,7 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
/* Part 4: register the device with sysfs */
vdev->dev.class = &video_class;
vdev->dev.devt = MKDEV(VIDEO_MAJOR, vdev->minor);
- if (vdev->parent)
- vdev->dev.parent = vdev->parent;
+ vdev->dev.parent = vdev->dev_parent;
dev_set_name(&vdev->dev, "%s%d", name_base, vdev->num);
ret = device_register(&vdev->dev);
if (ret < 0) {
@@ -936,9 +959,6 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
#endif
/* Part 6: Activate this minor. The char device can now be used. */
set_bit(V4L2_FL_REGISTERED, &vdev->flags);
- mutex_lock(&videodev_lock);
- video_device[vdev->minor] = vdev;
- mutex_unlock(&videodev_lock);
return 0;
@@ -946,6 +966,7 @@ cleanup:
mutex_lock(&videodev_lock);
if (vdev->cdev)
cdev_del(vdev->cdev);
+ video_device[vdev->minor] = NULL;
devnode_clear(vdev);
mutex_unlock(&videodev_lock);
/* Mark this video device as never having been registered. */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 16:10:41 +0000