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HID: multitouch: Add ELAN production request when resume.

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Add ELAN production request when resume.

Some Elan legacy devices require SET_IDLE to be set on resume.
It should be safe to send it to other devices too.
Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels.

Suggested by Benjamin Tissoires <benjamin.tissoires@enac.fr>

Signed-off-by: Scott Liu <scott.liu@emc.com.tw>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Scott Liu 2012-08-15 17:21:55 +08:00 committed by Jiri Kosina
parent ae01c9e53f
commit dfeefd108a
1 changed files with 27 additions and 0 deletions
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27
drivers/hid/hid-multitouch.c
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@ -765,6 +765,32 @@ static int mt_reset_resume(struct hid_device *hdev)
mt_set_input_mode(hdev);
return 0;
}
static int mt_resume(struct hid_device *hdev)
{
struct usb_interface *intf;
struct usb_host_interface *interface;
struct usb_device *dev;
if (hdev->bus != BUS_USB)
return 0;
intf = to_usb_interface(hdev->dev.parent);
interface = intf->cur_altsetting;
dev = hid_to_usb_dev(hdev);
/* Some Elan legacy devices require SET_IDLE to be set on resume.
* It should be safe to send it to other devices too.
* Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
HID_REQ_SET_IDLE,
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, interface->desc.bInterfaceNumber,
NULL, 0, USB_CTRL_SET_TIMEOUT);
return 0;
}
#endif
static void mt_remove(struct hid_device *hdev)
@ -1102,6 +1128,7 @@ static struct hid_driver mt_driver = {
.event = mt_event,
#ifdef CONFIG_PM
.reset_resume = mt_reset_resume,
.resume = mt_resume,
#endif
};