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path: root/drivers/media/video/gspca/gspca.c
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Diffstat (limited to 'drivers/media/video/gspca/gspca.c')
-rw-r--r--drivers/media/video/gspca/gspca.c545
1 files changed, 196 insertions, 349 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index ca5a2b1..137166d 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -38,6 +38,9 @@
#include <linux/uaccess.h>
#include <linux/ktime.h>
#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
#include "gspca.h"
@@ -592,16 +595,13 @@ static int gspca_set_alt0(struct gspca_dev *gspca_dev)
static void gspca_stream_off(struct gspca_dev *gspca_dev)
{
gspca_dev->streaming = 0;
- if (gspca_dev->present) {
- if (gspca_dev->sd_desc->stopN)
- gspca_dev->sd_desc->stopN(gspca_dev);
- destroy_urbs(gspca_dev);
- gspca_input_destroy_urb(gspca_dev);
- gspca_set_alt0(gspca_dev);
- gspca_input_create_urb(gspca_dev);
- }
-
- /* always call stop0 to free the subdriver's resources */
+ gspca_dev->usb_err = 0;
+ if (gspca_dev->sd_desc->stopN)
+ gspca_dev->sd_desc->stopN(gspca_dev);
+ destroy_urbs(gspca_dev);
+ gspca_input_destroy_urb(gspca_dev);
+ gspca_set_alt0(gspca_dev);
+ gspca_input_create_urb(gspca_dev);
if (gspca_dev->sd_desc->stop0)
gspca_dev->sd_desc->stop0(gspca_dev);
PDEBUG(D_STREAM, "stream off OK");
@@ -847,14 +847,6 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
struct ep_tb_s ep_tb[MAX_ALT];
int n, ret, xfer, alt, alt_idx;
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
-
- if (!gspca_dev->present) {
- ret = -ENODEV;
- goto unlock;
- }
-
/* reset the streaming variables */
gspca_dev->image = NULL;
gspca_dev->image_len = 0;
@@ -869,7 +861,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
if (gspca_dev->sd_desc->isoc_init) {
ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
if (ret < 0)
- goto unlock;
+ return ret;
}
xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
: USB_ENDPOINT_XFER_ISOC;
@@ -880,8 +872,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer);
if (ep == NULL) {
pr_err("bad altsetting %d\n", gspca_dev->alt);
- ret = -EIO;
- goto out;
+ return -EIO;
}
ep_tb[0].alt = gspca_dev->alt;
alt_idx = 1;
@@ -892,8 +883,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
if (alt_idx <= 0) {
pr_err("no transfer endpoint found\n");
- ret = -EIO;
- goto unlock;
+ return -EIO;
}
}
@@ -988,8 +978,6 @@ retry:
}
out:
gspca_input_create_urb(gspca_dev);
-unlock:
- mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
@@ -1006,6 +994,8 @@ static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
/* set the current control values to their default values
* which may have changed in sd_init() */
+ /* does nothing if ctrl_handler == NULL */
+ v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
ctrl = gspca_dev->cam.ctrls;
if (ctrl != NULL) {
for (i = 0;
@@ -1057,77 +1047,50 @@ static int gspca_get_mode(struct gspca_dev *gspca_dev,
static int vidioc_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
- int ret;
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
if (!gspca_dev->sd_desc->get_chip_ident)
- return -EINVAL;
+ return -ENOTTY;
if (!gspca_dev->sd_desc->get_register)
- return -EINVAL;
+ return -ENOTTY;
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
gspca_dev->usb_err = 0;
- if (gspca_dev->present)
- ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
- else
- ret = -ENODEV;
- mutex_unlock(&gspca_dev->usb_lock);
-
- return ret;
+ return gspca_dev->sd_desc->get_register(gspca_dev, reg);
}
static int vidioc_s_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
- int ret;
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
if (!gspca_dev->sd_desc->get_chip_ident)
- return -EINVAL;
+ return -ENOTTY;
if (!gspca_dev->sd_desc->set_register)
- return -EINVAL;
+ return -ENOTTY;
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
gspca_dev->usb_err = 0;
- if (gspca_dev->present)
- ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
- else
- ret = -ENODEV;
- mutex_unlock(&gspca_dev->usb_lock);
-
- return ret;
+ return gspca_dev->sd_desc->set_register(gspca_dev, reg);
}
#endif
static int vidioc_g_chip_ident(struct file *file, void *priv,
struct v4l2_dbg_chip_ident *chip)
{
- int ret;
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
if (!gspca_dev->sd_desc->get_chip_ident)
- return -EINVAL;
+ return -ENOTTY;
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
gspca_dev->usb_err = 0;
- if (gspca_dev->present)
- ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
- else
- ret = -ENODEV;
- mutex_unlock(&gspca_dev->usb_lock);
-
- return ret;
+ return gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *fmtdesc)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int i, j, index;
__u32 fmt_tb[8];
@@ -1169,7 +1132,7 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int mode;
mode = gspca_dev->curr_mode;
@@ -1214,7 +1177,7 @@ static int vidioc_try_fmt_vid_cap(struct file *file,
void *priv,
struct v4l2_format *fmt)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int ret;
ret = try_fmt_vid_cap(gspca_dev, fmt);
@@ -1226,7 +1189,7 @@ static int vidioc_try_fmt_vid_cap(struct file *file,
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int ret;
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
@@ -1265,7 +1228,7 @@ out:
static int vidioc_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *fsize)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int i;
__u32 index = 0;
@@ -1291,7 +1254,7 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
static int vidioc_enum_frameintervals(struct file *filp, void *priv,
struct v4l2_frmivalenum *fival)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(filp);
int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
__u32 i;
@@ -1316,31 +1279,30 @@ static int vidioc_enum_frameintervals(struct file *filp, void *priv,
return -EINVAL;
}
-static void gspca_release(struct video_device *vfd)
+static void gspca_release(struct v4l2_device *v4l2_device)
{
- struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
+ struct gspca_dev *gspca_dev =
+ container_of(v4l2_device, struct gspca_dev, v4l2_dev);
PDEBUG(D_PROBE, "%s released",
video_device_node_name(&gspca_dev->vdev));
+ v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
+ v4l2_device_unregister(&gspca_dev->v4l2_dev);
kfree(gspca_dev->usb_buf);
kfree(gspca_dev);
}
static int dev_open(struct file *file)
{
- struct gspca_dev *gspca_dev;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
PDEBUG(D_STREAM, "[%s] open", current->comm);
- gspca_dev = (struct gspca_dev *) video_devdata(file);
- if (!gspca_dev->present)
- return -ENODEV;
/* protect the subdriver against rmmod */
if (!try_module_get(gspca_dev->module))
return -ENODEV;
- file->private_data = gspca_dev;
#ifdef GSPCA_DEBUG
/* activate the v4l2 debug */
if (gspca_debug & D_V4L2)
@@ -1350,49 +1312,44 @@ static int dev_open(struct file *file)
gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
| V4L2_DEBUG_IOCTL_ARG);
#endif
- return 0;
+ return v4l2_fh_open(file);
}
static int dev_close(struct file *file)
{
- struct gspca_dev *gspca_dev = file->private_data;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
PDEBUG(D_STREAM, "[%s] close", current->comm);
- if (mutex_lock_interruptible(&gspca_dev->queue_lock))
+
+ /* Needed for gspca_stream_off, always lock before queue_lock! */
+ if (mutex_lock_interruptible(&gspca_dev->usb_lock))
return -ERESTARTSYS;
+ if (mutex_lock_interruptible(&gspca_dev->queue_lock)) {
+ mutex_unlock(&gspca_dev->usb_lock);
+ return -ERESTARTSYS;
+ }
+
/* if the file did the capture, free the streaming resources */
if (gspca_dev->capt_file == file) {
- if (gspca_dev->streaming) {
- mutex_lock(&gspca_dev->usb_lock);
- gspca_dev->usb_err = 0;
+ if (gspca_dev->streaming)
gspca_stream_off(gspca_dev);
- mutex_unlock(&gspca_dev->usb_lock);
- }
frame_free(gspca_dev);
}
- file->private_data = NULL;
module_put(gspca_dev->module);
mutex_unlock(&gspca_dev->queue_lock);
+ mutex_unlock(&gspca_dev->usb_lock);
PDEBUG(D_STREAM, "close done");
- return 0;
+ return v4l2_fh_release(file);
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
- struct gspca_dev *gspca_dev = priv;
- int ret;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
- /* protect the access to the usb device */
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
- if (!gspca_dev->present) {
- ret = -ENODEV;
- goto out;
- }
strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
sizeof cap->driver);
if (gspca_dev->dev->product != NULL) {
@@ -1406,13 +1363,11 @@ static int vidioc_querycap(struct file *file, void *priv,
}
usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
sizeof(cap->bus_info));
- cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
| V4L2_CAP_READWRITE;
- ret = 0;
-out:
- mutex_unlock(&gspca_dev->usb_lock);
- return ret;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
}
static int get_ctrl(struct gspca_dev *gspca_dev,
@@ -1435,7 +1390,7 @@ static int get_ctrl(struct gspca_dev *gspca_dev,
static int vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *q_ctrl)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
const struct ctrl *ctrls;
struct gspca_ctrl *gspca_ctrl;
int i, idx;
@@ -1478,10 +1433,10 @@ static int vidioc_queryctrl(struct file *file, void *priv,
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
const struct ctrl *ctrls;
struct gspca_ctrl *gspca_ctrl;
- int idx, ret;
+ int idx;
idx = get_ctrl(gspca_dev, ctrl->id);
if (idx < 0)
@@ -1501,74 +1456,52 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
return -ERANGE;
}
PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
- if (!gspca_dev->present) {
- ret = -ENODEV;
- goto out;
- }
gspca_dev->usb_err = 0;
- if (ctrls->set != NULL) {
- ret = ctrls->set(gspca_dev, ctrl->value);
- goto out;
- }
+ if (ctrls->set != NULL)
+ return ctrls->set(gspca_dev, ctrl->value);
if (gspca_ctrl != NULL) {
gspca_ctrl->val = ctrl->value;
if (ctrls->set_control != NULL
&& gspca_dev->streaming)
ctrls->set_control(gspca_dev);
}
- ret = gspca_dev->usb_err;
-out:
- mutex_unlock(&gspca_dev->usb_lock);
- return ret;
+ return gspca_dev->usb_err;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
const struct ctrl *ctrls;
- int idx, ret;
+ int idx;
idx = get_ctrl(gspca_dev, ctrl->id);
if (idx < 0)
return -EINVAL;
ctrls = &gspca_dev->sd_desc->ctrls[idx];
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
- if (!gspca_dev->present) {
- ret = -ENODEV;
- goto out;
- }
gspca_dev->usb_err = 0;
- if (ctrls->get != NULL) {
- ret = ctrls->get(gspca_dev, &ctrl->value);
- goto out;
- }
+ if (ctrls->get != NULL)
+ return ctrls->get(gspca_dev, &ctrl->value);
if (gspca_dev->cam.ctrls != NULL)
ctrl->value = gspca_dev->cam.ctrls[idx].val;
- ret = 0;
-out:
- mutex_unlock(&gspca_dev->usb_lock);
- return ret;
+ return 0;
}
static int vidioc_querymenu(struct file *file, void *priv,
struct v4l2_querymenu *qmenu)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
if (!gspca_dev->sd_desc->querymenu)
- return -EINVAL;
+ return -ENOTTY;
return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
}
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *input)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
if (input->index != 0)
return -EINVAL;
@@ -1595,7 +1528,7 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
static int vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *rb)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int i, ret = 0, streaming;
i = rb->memory; /* (avoid compilation warning) */
@@ -1635,10 +1568,7 @@ static int vidioc_reqbufs(struct file *file, void *priv,
/* stop streaming */
streaming = gspca_dev->streaming;
if (streaming) {
- mutex_lock(&gspca_dev->usb_lock);
- gspca_dev->usb_err = 0;
gspca_stream_off(gspca_dev);
- mutex_unlock(&gspca_dev->usb_lock);
/* Don't restart the stream when switching from read
* to mmap mode */
@@ -1666,7 +1596,7 @@ out:
static int vidioc_querybuf(struct file *file, void *priv,
struct v4l2_buffer *v4l2_buf)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
struct gspca_frame *frame;
if (v4l2_buf->index < 0
@@ -1681,7 +1611,7 @@ static int vidioc_querybuf(struct file *file, void *priv,
static int vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int ret;
if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
@@ -1722,7 +1652,7 @@ out:
static int vidioc_streamoff(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
int ret;
if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
@@ -1743,13 +1673,7 @@ static int vidioc_streamoff(struct file *file, void *priv,
}
/* stop streaming */
- if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
- ret = -ERESTARTSYS;
- goto out;
- }
- gspca_dev->usb_err = 0;
gspca_stream_off(gspca_dev);
- mutex_unlock(&gspca_dev->usb_lock);
/* In case another thread is waiting in dqbuf */
wake_up_interruptible(&gspca_dev->wq);
@@ -1766,71 +1690,44 @@ out:
static int vidioc_g_jpegcomp(struct file *file, void *priv,
struct v4l2_jpegcompression *jpegcomp)
{
- struct gspca_dev *gspca_dev = priv;
- int ret;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
if (!gspca_dev->sd_desc->get_jcomp)
- return -EINVAL;
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
+ return -ENOTTY;
gspca_dev->usb_err = 0;
- if (gspca_dev->present)
- ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
- else
- ret = -ENODEV;
- mutex_unlock(&gspca_dev->usb_lock);
- return ret;
+ return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
}
static int vidioc_s_jpegcomp(struct file *file, void *priv,
struct v4l2_jpegcompression *jpegcomp)
{
- struct gspca_dev *gspca_dev = priv;
- int ret;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
if (!gspca_dev->sd_desc->set_jcomp)
- return -EINVAL;
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
+ return -ENOTTY;
gspca_dev->usb_err = 0;
- if (gspca_dev->present)
- ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
- else
- ret = -ENODEV;
- mutex_unlock(&gspca_dev->usb_lock);
- return ret;
+ return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
}
static int vidioc_g_parm(struct file *filp, void *priv,
struct v4l2_streamparm *parm)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(filp);
parm->parm.capture.readbuffers = gspca_dev->nbufread;
if (gspca_dev->sd_desc->get_streamparm) {
- int ret;
-
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
- if (gspca_dev->present) {
- gspca_dev->usb_err = 0;
- gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
- ret = gspca_dev->usb_err;
- } else {
- ret = -ENODEV;
- }
- mutex_unlock(&gspca_dev->usb_lock);
- return ret;
+ gspca_dev->usb_err = 0;
+ gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
+ return gspca_dev->usb_err;
}
-
return 0;
}
static int vidioc_s_parm(struct file *filp, void *priv,
struct v4l2_streamparm *parm)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(filp);
int n;
n = parm->parm.capture.readbuffers;
@@ -1840,19 +1737,9 @@ static int vidioc_s_parm(struct file *filp, void *priv,
gspca_dev->nbufread = n;
if (gspca_dev->sd_desc->set_streamparm) {
- int ret;
-
- if (mutex_lock_interruptible(&gspca_dev->usb_lock))
- return -ERESTARTSYS;
- if (gspca_dev->present) {
- gspca_dev->usb_err = 0;
- gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
- ret = gspca_dev->usb_err;
- } else {
- ret = -ENODEV;
- }
- mutex_unlock(&gspca_dev->usb_lock);
- return ret;
+ gspca_dev->usb_err = 0;
+ gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
+ return gspca_dev->usb_err;
}
return 0;
@@ -1860,7 +1747,7 @@ static int vidioc_s_parm(struct file *filp, void *priv,
static int dev_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct gspca_dev *gspca_dev = file->private_data;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
struct gspca_frame *frame;
struct page *page;
unsigned long addr, start, size;
@@ -1872,10 +1759,6 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma)
if (mutex_lock_interruptible(&gspca_dev->queue_lock))
return -ERESTARTSYS;
- if (!gspca_dev->present) {
- ret = -ENODEV;
- goto out;
- }
if (gspca_dev->capt_file != file) {
ret = -EINVAL;
goto out;
@@ -1963,7 +1846,7 @@ static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
static int vidioc_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *v4l2_buf)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
struct gspca_frame *frame;
int i, j, ret;
@@ -2003,14 +1886,6 @@ static int vidioc_dqbuf(struct file *file, void *priv,
gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
- if (gspca_dev->sd_desc->dq_callback) {
- mutex_lock(&gspca_dev->usb_lock);
- gspca_dev->usb_err = 0;
- if (gspca_dev->present)
- gspca_dev->sd_desc->dq_callback(gspca_dev);
- mutex_unlock(&gspca_dev->usb_lock);
- }
-
frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
PDEBUG(D_FRAM, "dqbuf %d", j);
@@ -2027,6 +1902,15 @@ static int vidioc_dqbuf(struct file *file, void *priv,
}
out:
mutex_unlock(&gspca_dev->queue_lock);
+
+ if (ret == 0 && gspca_dev->sd_desc->dq_callback) {
+ mutex_lock(&gspca_dev->usb_lock);
+ gspca_dev->usb_err = 0;
+ if (gspca_dev->present)
+ gspca_dev->sd_desc->dq_callback(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+ }
+
return ret;
}
@@ -2039,7 +1923,7 @@ out:
static int vidioc_qbuf(struct file *file, void *priv,
struct v4l2_buffer *v4l2_buf)
{
- struct gspca_dev *gspca_dev = priv;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
struct gspca_frame *frame;
int i, index, ret;
@@ -2098,6 +1982,10 @@ static int read_alloc(struct gspca_dev *gspca_dev,
int i, ret;
PDEBUG(D_STREAM, "read alloc");
+
+ if (mutex_lock_interruptible(&gspca_dev->usb_lock))
+ return -ERESTARTSYS;
+
if (gspca_dev->nframes == 0) {
struct v4l2_requestbuffers rb;
@@ -2108,7 +1996,7 @@ static int read_alloc(struct gspca_dev *gspca_dev,
ret = vidioc_reqbufs(file, gspca_dev, &rb);
if (ret != 0) {
PDEBUG(D_STREAM, "read reqbuf err %d", ret);
- return ret;
+ goto out;
}
memset(&v4l2_buf, 0, sizeof v4l2_buf);
v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
@@ -2118,61 +2006,69 @@ static int read_alloc(struct gspca_dev *gspca_dev,
ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
if (ret != 0) {
PDEBUG(D_STREAM, "read qbuf err: %d", ret);
- return ret;
+ goto out;
}
}
- gspca_dev->memory = GSPCA_MEMORY_READ;
}
/* start streaming */
ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
if (ret != 0)
PDEBUG(D_STREAM, "read streamon err %d", ret);
+out:
+ mutex_unlock(&gspca_dev->usb_lock);
return ret;
}
static unsigned int dev_poll(struct file *file, poll_table *wait)
{
- struct gspca_dev *gspca_dev = file->private_data;
- int ret;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
+ unsigned long req_events = poll_requested_events(wait);
+ int ret = 0;
PDEBUG(D_FRAM, "poll");
- poll_wait(file, &gspca_dev->wq, wait);
+ if (req_events & POLLPRI)
+ ret |= v4l2_ctrl_poll(file, wait);
- /* if reqbufs is not done, the user would use read() */
- if (gspca_dev->memory == GSPCA_MEMORY_NO) {
- ret = read_alloc(gspca_dev, file);
- if (ret != 0)
- return POLLERR;
- }
+ if (req_events & (POLLIN | POLLRDNORM)) {
+ /* if reqbufs is not done, the user would use read() */
+ if (gspca_dev->memory == GSPCA_MEMORY_NO) {
+ if (read_alloc(gspca_dev, file) != 0) {
+ ret |= POLLERR;
+ goto out;
+ }
+ }
- if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
- return POLLERR;
+ poll_wait(file, &gspca_dev->wq, wait);
- /* check if an image has been received */
- if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
- ret = POLLIN | POLLRDNORM; /* yes */
- else
- ret = 0;
- mutex_unlock(&gspca_dev->queue_lock);
+ /* check if an image has been received */
+ if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) {
+ ret |= POLLERR;
+ goto out;
+ }
+ if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
+ ret |= POLLIN | POLLRDNORM;
+ mutex_unlock(&gspca_dev->queue_lock);
+ }
+
+out:
if (!gspca_dev->present)
- return POLLHUP;
+ ret |= POLLHUP;
+
return ret;
}
static ssize_t dev_read(struct file *file, char __user *data,
size_t count, loff_t *ppos)
{
- struct gspca_dev *gspca_dev = file->private_data;
+ struct gspca_dev *gspca_dev = video_drvdata(file);
struct gspca_frame *frame;
struct v4l2_buffer v4l2_buf;
struct timeval timestamp;
int n, ret, ret2;
PDEBUG(D_FRAM, "read (%zd)", count);
- if (!gspca_dev->present)
- return -ENODEV;
if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
ret = read_alloc(gspca_dev, file);
if (ret != 0)
@@ -2266,13 +2162,15 @@ static const struct v4l2_ioctl_ops dev_ioctl_ops = {
.vidioc_s_register = vidioc_s_register,
#endif
.vidioc_g_chip_ident = vidioc_g_chip_ident,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static const struct video_device gspca_template = {
.name = "gspca main driver",
.fops = &dev_fops,
.ioctl_ops = &dev_ioctl_ops,
- .release = gspca_release,
+ .release = video_device_release_empty, /* We use v4l2_dev.release */
};
/* initialize the controls */
@@ -2344,9 +2242,24 @@ int gspca_dev_probe2(struct usb_interface *intf,
}
}
+ gspca_dev->v4l2_dev.release = gspca_release;
+ ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
+ if (ret)
+ goto out;
gspca_dev->sd_desc = sd_desc;
gspca_dev->nbufread = 2;
gspca_dev->empty_packet = -1; /* don't check the empty packets */
+ gspca_dev->vdev = gspca_template;
+ gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
+ video_set_drvdata(&gspca_dev->vdev, gspca_dev);
+ set_bit(V4L2_FL_USE_FH_PRIO, &gspca_dev->vdev.flags);
+ gspca_dev->module = module;
+ gspca_dev->present = 1;
+
+ mutex_init(&gspca_dev->usb_lock);
+ gspca_dev->vdev.lock = &gspca_dev->usb_lock;
+ mutex_init(&gspca_dev->queue_lock);
+ init_waitqueue_head(&gspca_dev->wq);
/* configure the subdriver and initialize the USB device */
ret = sd_desc->config(gspca_dev, id);
@@ -2357,21 +2270,26 @@ int gspca_dev_probe2(struct usb_interface *intf,
ret = sd_desc->init(gspca_dev);
if (ret < 0)
goto out;
+ if (sd_desc->init_controls)
+ ret = sd_desc->init_controls(gspca_dev);
+ if (ret < 0)
+ goto out;
gspca_set_default_mode(gspca_dev);
ret = gspca_input_connect(gspca_dev);
if (ret)
goto out;
- mutex_init(&gspca_dev->usb_lock);
- mutex_init(&gspca_dev->queue_lock);
- init_waitqueue_head(&gspca_dev->wq);
+ /*
+ * Don't take usb_lock for these ioctls. This improves latency if
+ * usb_lock is taken for a long time, e.g. when changing a control
+ * value, and a new frame is ready to be dequeued.
+ */
+ v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF);
+ v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF);
+ v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF);
/* init video stuff */
- memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
- gspca_dev->vdev.parent = &intf->dev;
- gspca_dev->module = module;
- gspca_dev->present = 1;
ret = video_register_device(&gspca_dev->vdev,
VFL_TYPE_GRABBER,
-1);
@@ -2391,6 +2309,7 @@ out:
if (gspca_dev->input_dev)
input_unregister_device(gspca_dev->input_dev);
#endif
+ v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
kfree(gspca_dev->usb_buf);
kfree(gspca_dev);
return ret;
@@ -2437,11 +2356,12 @@ void gspca_disconnect(struct usb_interface *intf)
PDEBUG(D_PROBE, "%s disconnect",
video_device_node_name(&gspca_dev->vdev));
+
mutex_lock(&gspca_dev->usb_lock);
+ usb_set_intfdata(intf, NULL);
+ gspca_dev->dev = NULL;
gspca_dev->present = 0;
- wake_up_interruptible(&gspca_dev->wq);
-
destroy_urbs(gspca_dev);
#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
@@ -2452,18 +2372,19 @@ void gspca_disconnect(struct usb_interface *intf)
input_unregister_device(input_dev);
}
#endif
+ /* Free subdriver's streaming resources / stop sd workqueue(s) */
+ if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming)
+ gspca_dev->sd_desc->stop0(gspca_dev);
+ gspca_dev->streaming = 0;
+ wake_up_interruptible(&gspca_dev->wq);
- /* the device is freed at exit of this function */
- gspca_dev->dev = NULL;
- mutex_unlock(&gspca_dev->usb_lock);
+ v4l2_device_disconnect(&gspca_dev->v4l2_dev);
+ video_unregister_device(&gspca_dev->vdev);
- usb_set_intfdata(intf, NULL);
+ mutex_unlock(&gspca_dev->usb_lock);
- /* release the device */
/* (this will call gspca_release() immediately or on last close) */
- video_unregister_device(&gspca_dev->vdev);
-
-/* PDEBUG(D_PROBE, "disconnect complete"); */
+ v4l2_device_put(&gspca_dev->v4l2_dev);
}
EXPORT_SYMBOL(gspca_disconnect);
@@ -2474,7 +2395,9 @@ int gspca_suspend(struct usb_interface *intf, pm_message_t message)
if (!gspca_dev->streaming)
return 0;
+ mutex_lock(&gspca_dev->usb_lock);
gspca_dev->frozen = 1; /* avoid urb error messages */
+ gspca_dev->usb_err = 0;
if (gspca_dev->sd_desc->stopN)
gspca_dev->sd_desc->stopN(gspca_dev);
destroy_urbs(gspca_dev);
@@ -2482,6 +2405,7 @@ int gspca_suspend(struct usb_interface *intf, pm_message_t message)
gspca_set_alt0(gspca_dev);
if (gspca_dev->sd_desc->stop0)
gspca_dev->sd_desc->stop0(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
return 0;
}
EXPORT_SYMBOL(gspca_suspend);
@@ -2489,105 +2413,28 @@ EXPORT_SYMBOL(gspca_suspend);
int gspca_resume(struct usb_interface *intf)
{
struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+ int streaming, ret = 0;
+ mutex_lock(&gspca_dev->usb_lock);
gspca_dev->frozen = 0;
+ gspca_dev->usb_err = 0;
gspca_dev->sd_desc->init(gspca_dev);
gspca_input_create_urb(gspca_dev);
- if (gspca_dev->streaming)
- return gspca_init_transfer(gspca_dev);
- return 0;
+ /*
+ * Most subdrivers send all ctrl values on sd_start and thus
+ * only write to the device registers on s_ctrl when streaming ->
+ * Clear streaming to avoid setting all ctrls twice.
+ */
+ streaming = gspca_dev->streaming;
+ gspca_dev->streaming = 0;
+ v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
+ if (streaming)
+ ret = gspca_init_transfer(gspca_dev);
+ mutex_unlock(&gspca_dev->usb_lock);
+ return ret;
}
EXPORT_SYMBOL(gspca_resume);
#endif
-/* -- cam driver utility functions -- */
-
-/* auto gain and exposure algorithm based on the knee algorithm described here:
- http://ytse.tricolour.net/docs/LowLightOptimization.html
-
- Returns 0 if no changes were made, 1 if the gain and or exposure settings
- where changed. */
-int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
- int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
-{
- int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
- const struct ctrl *gain_ctrl = NULL;
- const struct ctrl *exposure_ctrl = NULL;
- const struct ctrl *autogain_ctrl = NULL;
- int retval = 0;
-
- for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
- if (gspca_dev->ctrl_dis & (1 << i))
- continue;
- if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
- gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
- if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
- exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
- if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
- autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
- }
- if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
- PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
- "on cam without (auto)gain/exposure");
- return 0;
- }
-
- if (gain_ctrl->get(gspca_dev, &gain) ||
- exposure_ctrl->get(gspca_dev, &exposure) ||
- autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
- return 0;
-
- orig_gain = gain;
- orig_exposure = exposure;
-
- /* If we are of a multiple of deadzone, do multiple steps to reach the
- desired lumination fast (with the risc of a slight overshoot) */
- steps = abs(desired_avg_lum - avg_lum) / deadzone;
-
- PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
- avg_lum, desired_avg_lum, steps);
-
- for (i = 0; i < steps; i++) {
- if (avg_lum > desired_avg_lum) {
- if (gain > gain_knee)
- gain--;
- else if (exposure > exposure_knee)
- exposure--;
- else if (gain > gain_ctrl->qctrl.default_value)
- gain--;
- else if (exposure > exposure_ctrl->qctrl.minimum)
- exposure--;
- else if (gain > gain_ctrl->qctrl.minimum)
- gain--;
- else
- break;
- } else {
- if (gain < gain_ctrl->qctrl.default_value)
- gain++;
- else if (exposure < exposure_knee)
- exposure++;
- else if (gain < gain_knee)
- gain++;
- else if (exposure < exposure_ctrl->qctrl.maximum)
- exposure++;
- else if (gain < gain_ctrl->qctrl.maximum)
- gain++;
- else
- break;
- }
- }
-
- if (gain != orig_gain) {
- gain_ctrl->set(gspca_dev, gain);
- retval = 1;
- }
- if (exposure != orig_exposure) {
- exposure_ctrl->set(gspca_dev, exposure);
- retval = 1;
- }
-
- return retval;
-}
-EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
/* -- module insert / remove -- */
static int __init gspca_init(void)
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