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authorTobias Lorenz <tobias.lorenz@gmx.net>2008-02-09 20:08:24 +0100
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-02-18 15:15:18 +0100
commit57566ad2d83f58c02e191aa7f4d7cddad3f92618 (patch)
treee305453cd2beab2d5127abae679df2aae48283b4 /drivers
parentV4L/DVB (7188): radio-si470x version 1.0.6 (diff)
downloadlinux-57566ad2d83f58c02e191aa7f4d7cddad3f92618.tar.xz
linux-57566ad2d83f58c02e191aa7f4d7cddad3f92618.zip
V4L/DVB (7189): autosuspend support
Together with Oliver Neukum from Novell, USB autosuspend support was added. Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/radio/radio-si470x.c83
1 files changed, 75 insertions, 8 deletions
diff --git a/drivers/media/radio/radio-si470x.c b/drivers/media/radio/radio-si470x.c
index c72a9e7ad885..649f14d2c013 100644
--- a/drivers/media/radio/radio-si470x.c
+++ b/drivers/media/radio/radio-si470x.c
@@ -81,6 +81,10 @@
* - racy interruptible_sleep_on(),
* replaced with wait_event_interruptible()
* - handle signals in read()
+ * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Oliver Neukum <oliver@neukum.org>
+ * Version 1.0.7
+ * - usb autosuspend support
*
* ToDo:
* - add seeking support
@@ -415,6 +419,7 @@ MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
struct si470x_device {
/* reference to USB and video device */
struct usb_device *usbdev;
+ struct usb_interface *intf;
struct video_device *videodev;
/* driver management */
@@ -762,9 +767,17 @@ static int si470x_stop(struct si470x_device *radio)
*/
static int si470x_rds_on(struct si470x_device *radio)
{
+ int retval;
+
/* sysconfig 1 */
+ mutex_lock(&radio->lock);
radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS;
- return si470x_set_register(radio, SYSCONFIG1);
+ retval = si470x_set_register(radio, SYSCONFIG1);
+ if (retval < 0)
+ radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS;
+ mutex_unlock(&radio->lock);
+
+ return retval;
}
@@ -961,10 +974,22 @@ static unsigned int si470x_fops_poll(struct file *file,
static int si470x_fops_open(struct inode *inode, struct file *file)
{
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ int retval;
radio->users++;
- if (radio->users == 1)
- return si470x_start(radio);
+
+ retval = usb_autopm_get_interface(radio->intf);
+ if (retval < 0) {
+ radio->users--;
+ return -EIO;
+ }
+
+ if (radio->users == 1) {
+ retval = si470x_start(radio);
+ if (retval < 0)
+ usb_autopm_put_interface(radio->intf);
+ return retval;
+ }
return 0;
}
@@ -976,6 +1001,7 @@ static int si470x_fops_open(struct inode *inode, struct file *file)
static int si470x_fops_release(struct inode *inode, struct file *file)
{
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ int retval;
if (!radio)
return -ENODEV;
@@ -988,7 +1014,9 @@ static int si470x_fops_release(struct inode *inode, struct file *file)
/* cancel read processes */
wake_up_interruptible(&radio->read_queue);
- return si470x_stop(radio);
+ retval = si470x_stop(radio);
+ usb_autopm_put_interface(radio->intf);
+ return retval;
}
return 0;
@@ -1377,6 +1405,7 @@ static int si470x_usb_driver_probe(struct usb_interface *intf,
sizeof(si470x_viddev_template));
radio->users = 0;
radio->usbdev = interface_to_usbdev(intf);
+ radio->intf = intf;
mutex_init(&radio->lock);
video_set_drvdata(radio->videodev, radio);
@@ -1440,6 +1469,41 @@ err_initial:
/*
+ * si470x_usb_driver_suspend - suspend the device
+ */
+static int si470x_usb_driver_suspend(struct usb_interface *intf,
+ pm_message_t message)
+{
+ struct si470x_device *radio = usb_get_intfdata(intf);
+
+ printk(KERN_INFO DRIVER_NAME ": suspending now...\n");
+
+ cancel_delayed_work_sync(&radio->work);
+
+ return 0;
+}
+
+
+/*
+ * si470x_usb_driver_resume - resume the device
+ */
+static int si470x_usb_driver_resume(struct usb_interface *intf)
+{
+ struct si470x_device *radio = usb_get_intfdata(intf);
+
+ printk(KERN_INFO DRIVER_NAME ": resuming now...\n");
+
+ mutex_lock(&radio->lock);
+ if (radio->users && radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)
+ schedule_delayed_work(&radio->work,
+ msecs_to_jiffies(rds_poll_time));
+ mutex_unlock(&radio->lock);
+
+ return 0;
+}
+
+
+/*
* si470x_usb_driver_disconnect - disconnect the device
*/
static void si470x_usb_driver_disconnect(struct usb_interface *intf)
@@ -1458,10 +1522,13 @@ static void si470x_usb_driver_disconnect(struct usb_interface *intf)
* si470x_usb_driver - usb driver interface
*/
static struct usb_driver si470x_usb_driver = {
- .name = DRIVER_NAME,
- .probe = si470x_usb_driver_probe,
- .disconnect = si470x_usb_driver_disconnect,
- .id_table = si470x_usb_driver_id_table,
+ .name = DRIVER_NAME,
+ .probe = si470x_usb_driver_probe,
+ .disconnect = si470x_usb_driver_disconnect,
+ .suspend = si470x_usb_driver_suspend,
+ .resume = si470x_usb_driver_resume,
+ .id_table = si470x_usb_driver_id_table,
+ .supports_autosuspend = 1,
};