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authorJaime Velasco Juan <jsagarribay@gmail.com>2008-01-27 12:24:59 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-02-18 11:14:58 -0300
commit1fdd61c0228a32b9a5e10593b225851d8920595b (patch)
tree61a2134e8a05f10fe51b0904d361a4b1eafc6e37 /drivers/media/video/stk-webcam.c
parent1112fb68ae9c838294d38e1f209fedbc0dbf11d5 (diff)
V4L/DVB (7089): V4L: stkwebcam: Power management support
Signed-off-by: Jaime Velasco Juan <jsagarribay@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/stk-webcam.c')
-rw-r--r--drivers/media/video/stk-webcam.c92
1 files changed, 72 insertions, 20 deletions
diff --git a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c
index ba4fe934ee9e..f84e8d511763 100644
--- a/drivers/media/video/stk-webcam.c
+++ b/drivers/media/video/stk-webcam.c
@@ -682,6 +682,7 @@ static int v4l_stk_open(struct inode *inode, struct file *fp)
return -ENXIO;
fp->private_data = vdev;
kref_get(&dev->kref);
+ usb_autopm_get_interface(dev->interface);
return 0;
}
@@ -703,6 +704,7 @@ static int v4l_stk_release(struct inode *inode, struct file *fp)
}
if (dev->owner != fp) {
+ usb_autopm_put_interface(dev->interface);
kref_put(&dev->kref, stk_camera_cleanup);
return 0;
}
@@ -713,6 +715,7 @@ static int v4l_stk_release(struct inode *inode, struct file *fp)
dev->owner = NULL;
+ usb_autopm_put_interface(dev->interface);
kref_put(&dev->kref, stk_camera_cleanup);
return 0;
@@ -1085,6 +1088,42 @@ static int stk_vidioc_try_fmt_cap(struct file *filp,
return 0;
}
+static int stk_setup_format(struct stk_camera *dev)
+{
+ int i = 0;
+ int depth;
+ if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
+ depth = 1;
+ else
+ depth = 2;
+ while (stk_sizes[i].m != dev->vsettings.mode
+ && i < ARRAY_SIZE(stk_sizes))
+ i++;
+ if (i == ARRAY_SIZE(stk_sizes)) {
+ STK_ERROR("Something is broken in %s\n", __FUNCTION__);
+ return -EFAULT;
+ }
+ /* This registers controls some timings, not sure of what. */
+ stk_camera_write_reg(dev, 0x001b, 0x0e);
+ if (dev->vsettings.mode == MODE_SXGA)
+ stk_camera_write_reg(dev, 0x001c, 0x0e);
+ else
+ stk_camera_write_reg(dev, 0x001c, 0x46);
+ /*
+ * Registers 0x0115 0x0114 are the size of each line (bytes),
+ * regs 0x0117 0x0116 are the heigth of the image.
+ */
+ stk_camera_write_reg(dev, 0x0115,
+ ((stk_sizes[i].w * depth) >> 8) & 0xff);
+ stk_camera_write_reg(dev, 0x0114,
+ (stk_sizes[i].w * depth) & 0xff);
+ stk_camera_write_reg(dev, 0x0117,
+ (stk_sizes[i].h >> 8) & 0xff);
+ stk_camera_write_reg(dev, 0x0116,
+ stk_sizes[i].h & 0xff);
+ return stk_sensor_configure(dev);
+}
+
static int stk_vidioc_s_fmt_cap(struct file *filp,
void *priv, struct v4l2_format *fmtd)
{
@@ -1099,10 +1138,10 @@ static int stk_vidioc_s_fmt_cap(struct file *filp,
return -EBUSY;
if (dev->owner && dev->owner != filp)
return -EBUSY;
- dev->owner = filp;
ret = stk_vidioc_try_fmt_cap(filp, priv, fmtd);
if (ret)
return ret;
+ dev->owner = filp;
dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
stk_free_buffers(dev);
@@ -1110,25 +1149,7 @@ static int stk_vidioc_s_fmt_cap(struct file *filp,
dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
stk_initialise(dev);
- /* This registers controls some timings, not sure of what. */
- stk_camera_write_reg(dev, 0x001b, 0x0e);
- if (dev->vsettings.mode == MODE_SXGA)
- stk_camera_write_reg(dev, 0x001c, 0x0e);
- else
- stk_camera_write_reg(dev, 0x001c, 0x46);
- /*
- * Registers 0x0115 0x0114 are the size of each line (bytes),
- * regs 0x0117 0x0116 are the heigth of the image.
- */
- stk_camera_write_reg(dev, 0x0115,
- (fmtd->fmt.pix.bytesperline >> 8) & 0xff);
- stk_camera_write_reg(dev, 0x0114,
- fmtd->fmt.pix.bytesperline & 0xff);
- stk_camera_write_reg(dev, 0x0117,
- (fmtd->fmt.pix.height >> 8) & 0xff);
- stk_camera_write_reg(dev, 0x0116,
- fmtd->fmt.pix.height & 0xff);
- return stk_sensor_configure(dev);
+ return stk_setup_format(dev);
}
static int stk_vidioc_reqbufs(struct file *filp,
@@ -1422,6 +1443,7 @@ static int stk_camera_probe(struct usb_interface *interface,
}
stk_create_sysfs_files(&dev->vdev);
+ usb_autopm_enable(dev->interface);
return 0;
}
@@ -1439,11 +1461,41 @@ static void stk_camera_disconnect(struct usb_interface *interface)
kref_put(&dev->kref, stk_camera_cleanup);
}
+#ifdef CONFIG_PM
+int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct stk_camera *dev = usb_get_intfdata(intf);
+ if (is_streaming(dev)) {
+ stk_stop_stream(dev);
+ /* yes, this is ugly */
+ set_streaming(dev);
+ }
+ return 0;
+}
+
+int stk_camera_resume(struct usb_interface *intf)
+{
+ struct stk_camera *dev = usb_get_intfdata(intf);
+ if (!is_initialised(dev))
+ return 0;
+ unset_initialised(dev);
+ stk_initialise(dev);
+ stk_setup_format(dev);
+ if (is_streaming(dev))
+ stk_start_stream(dev);
+ return 0;
+}
+#endif
+
static struct usb_driver stk_camera_driver = {
.name = "stkwebcam",
.probe = stk_camera_probe,
.disconnect = stk_camera_disconnect,
.id_table = stkwebcam_table,
+#ifdef CONFIG_PM
+ .suspend = stk_camera_suspend,
+ .resume = stk_camera_resume,
+#endif
};

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