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Input: wacom - implement suspend and autosuspend

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This implements suspend and autosuspend support for wacom devices.
It works by using the usb last busy functionality triggered in the
completion callback.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Oliver Neukum 2008-04-15 01:31:57 -04:00 committed by Dmitry Torokhov
parent 04021e4e40
commit e722409445
2 changed files with 71 additions and 12 deletions
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3
drivers/input/tablet/wacom.h
View file

@ -101,8 +101,11 @@ struct wacom {
dma_addr_t data_dma;
struct input_dev *dev;
struct usb_device *usbdev;
struct usb_interface *intf;
struct urb *irq;
struct wacom_wac * wacom_wac;
struct mutex lock;
int open:1;
char phys[32];
};

80
drivers/input/tablet/wacom_sys.c
View file

@ -70,6 +70,7 @@ static void wacom_sys_irq(struct urb *urb)
input_sync(get_input_dev(&wcombo));
exit:
usb_mark_last_busy(wacom->usbdev);
retval = usb_submit_urb (urb, GFP_ATOMIC);
if (retval)
err ("%s - usb_submit_urb failed with result %d",
@ -124,10 +125,25 @@ static int wacom_open(struct input_dev *dev)
{
struct wacom *wacom = input_get_drvdata(dev);
wacom->irq->dev = wacom->usbdev;
if (usb_submit_urb(wacom->irq, GFP_KERNEL))
return -EIO;
mutex_lock(&wacom->lock);
wacom->irq->dev = wacom->usbdev;
if (usb_autopm_get_interface(wacom->intf) < 0) {
mutex_unlock(&wacom->lock);
return -EIO;
}
if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
usb_autopm_put_interface(wacom->intf);
mutex_unlock(&wacom->lock);
return -EIO;
}
wacom->open = 1;
wacom->intf->needs_remote_wakeup = 1;
mutex_unlock(&wacom->lock);
return 0;
}
@ -135,7 +151,11 @@ static void wacom_close(struct input_dev *dev)
{
struct wacom *wacom = input_get_drvdata(dev);
mutex_lock(&wacom->lock);
usb_kill_urb(wacom->irq);
wacom->open = 0;
wacom->intf->needs_remote_wakeup = 0;
mutex_unlock(&wacom->lock);
}
void input_dev_mo(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
@ -243,6 +263,8 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
wacom->usbdev = dev;
wacom->dev = input_dev;
wacom->intf = intf;
mutex_init(&wacom->lock);
usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
@ -304,23 +326,57 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
static void wacom_disconnect(struct usb_interface *intf)
{
struct wacom *wacom = usb_get_intfdata (intf);
struct wacom *wacom = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (wacom) {
usb_kill_urb(wacom->irq);
input_unregister_device(wacom->dev);
usb_free_urb(wacom->irq);
usb_buffer_free(interface_to_usbdev(intf), 10, wacom->wacom_wac->data, wacom->data_dma);
kfree(wacom->wacom_wac);
kfree(wacom);
}
usb_kill_urb(wacom->irq);
input_unregister_device(wacom->dev);
usb_free_urb(wacom->irq);
usb_buffer_free(interface_to_usbdev(intf), 10, wacom->wacom_wac->data, wacom->data_dma);
kfree(wacom->wacom_wac);
kfree(wacom);
}
static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
{
struct wacom *wacom = usb_get_intfdata(intf);
mutex_lock(&wacom->lock);
usb_kill_urb(wacom->irq);
mutex_unlock(&wacom->lock);
return 0;
}
static int wacom_resume(struct usb_interface *intf)
{
struct wacom *wacom = usb_get_intfdata(intf);
int rv;
mutex_lock(&wacom->lock);
if (wacom->open)
rv = usb_submit_urb(wacom->irq, GFP_NOIO);
else
rv = 0;
mutex_unlock(&wacom->lock);
return rv;
}
static int wacom_reset_resume(struct usb_interface *intf)
{
return wacom_resume(intf);
}
static struct usb_driver wacom_driver = {
.name = "wacom",
.probe = wacom_probe,
.disconnect = wacom_disconnect,
.suspend = wacom_suspend,
.resume = wacom_resume,
.reset_resume = wacom_reset_resume,
.supports_autosuspend = 1,
};
static int __init wacom_init(void)