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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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13
drivers/hid/usbhid/hid-core.c
View File

@@ -1243,6 +1243,18 @@ static int usbhid_power(struct hid_device *hid, int lvl)
return r; return r;
} }
static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype)
{
switch (reqtype) {
case HID_REQ_GET_REPORT:
usbhid_submit_report(hid, rep, USB_DIR_IN);
break;
case HID_REQ_SET_REPORT:
usbhid_submit_report(hid, rep, USB_DIR_OUT);
break;
}
}
static struct hid_ll_driver usb_hid_driver = { static struct hid_ll_driver usb_hid_driver = {
.parse = usbhid_parse, .parse = usbhid_parse,
.start = usbhid_start, .start = usbhid_start,
@@ -1251,6 +1263,7 @@ static struct hid_ll_driver usb_hid_driver = {
.close = usbhid_close, .close = usbhid_close,
.power = usbhid_power, .power = usbhid_power,
.hidinput_input_event = usb_hidinput_input_event, .hidinput_input_event = usb_hidinput_input_event,
.request = usbhid_request,
}; };
static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id) static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id)

20
include/linux/hid.h
View File

@@ -662,6 +662,7 @@ struct hid_driver {
* @hidinput_input_event: event input event (e.g. ff or leds) * @hidinput_input_event: event input event (e.g. ff or leds)
* @parse: this method is called only once to parse the device data, * @parse: this method is called only once to parse the device data,
* shouldn't allocate anything to not leak memory * shouldn't allocate anything to not leak memory
* @request: send report request to device (e.g. feature report)
*/ */
struct hid_ll_driver { struct hid_ll_driver {
int (*start)(struct hid_device *hdev); int (*start)(struct hid_device *hdev);
@@ -676,6 +677,10 @@ struct hid_ll_driver {
unsigned int code, int value); unsigned int code, int value);
int (*parse)(struct hid_device *hdev); int (*parse)(struct hid_device *hdev);
void (*request)(struct hid_device *hdev,
struct hid_report *report, int reqtype);
}; };
#define PM_HINT_FULLON 1<<5 #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; 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 hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
int interrupt); int interrupt);