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HID: Extend the interface with report requests

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Some drivers send reports directly to underlying device, creating an
unwanted dependency on the underlying transport layer. This patch adds
hid_hw_request() to the interface, thereby removing usbhid from the
lion share of the drivers.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Henrik Rydberg 2013-02-25 11:31:43 +01:00 • committed by Jiri Kosina
parent 48a732dfaa
commit e90a6df80d
2 changed files with 33 additions and 0 deletions
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20
include/linux/hid.h
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@ -662,6 +662,7 @@ struct hid_driver {
* @hidinput_input_event: event input event (e.g. ff or leds)
* @parse: this method is called only once to parse the device data,
* shouldn't allocate anything to not leak memory
* @request: send report request to device (e.g. feature report)
*/
struct hid_ll_driver {
int (*start)(struct hid_device *hdev);
@ -676,6 +677,10 @@ struct hid_ll_driver {
unsigned int code, int value);
int (*parse)(struct hid_device *hdev);
void (*request)(struct hid_device *hdev,
struct hid_report *report, int reqtype);
};
#define PM_HINT_FULLON 1<<5
@ -883,6 +888,21 @@ static inline int hid_hw_power(struct hid_device *hdev, int level)
return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
}
/**
* hid_hw_request - send report request to device
*
* @hdev: hid device
* @report: report to send
* @reqtype: hid request type
*/
static inline void hid_hw_request(struct hid_device *hdev,
struct hid_report *report, int reqtype)
{
if (hdev->ll_driver->request)
hdev->ll_driver->request(hdev, report, reqtype);
}
int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
int interrupt);