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HID: uhid: forward output request to user-space 

If the hid-driver wants to send standardized data to the device it uses a
linux input_event. We forward this to the user-space transport-level
driver so they can perform the requested action on the device.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann 2012-06-10 15:16:23 +02:00 committed by Jiri Kosina
parent e7191474a5
commit f80e13601c
2 changed files with 26 additions and 0 deletions
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18
drivers/hid/uhid.c
View File

@ -112,6 +112,24 @@ static void uhid_hid_close(struct hid_device *hid)
static int uhid_hid_input(struct input_dev *input, unsigned int type,
unsigned int code, int value)
{
struct hid_device *hid = input_get_drvdata(input);
struct uhid_device *uhid = hid->driver_data;
unsigned long flags;
struct uhid_event *ev;
ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
if (!ev)
return -ENOMEM;
ev->type = UHID_OUTPUT_EV;
ev->u.output_ev.type = type;
ev->u.output_ev.code = code;
ev->u.output_ev.value = value;
spin_lock_irqsave(&uhid->qlock, flags);
uhid_queue(uhid, ev);
spin_unlock_irqrestore(&uhid->qlock, flags);
return 0;
}

8
include/linux/uhid.h
View File

@ -29,6 +29,7 @@ enum uhid_event_type {
UHID_STOP,
UHID_OPEN,
UHID_CLOSE,
UHID_OUTPUT_EV,
UHID_INPUT,
};
@ -53,12 +54,19 @@ struct uhid_input_req {
__u16 size;
} __attribute__((__packed__));
struct uhid_output_ev_req {
__u16 type;
__u16 code;
__s32 value;
} __attribute__((__packed__));
struct uhid_event {
__u32 type;
union {
struct uhid_create_req create;
struct uhid_input_req input;
struct uhid_output_ev_req output_ev;
} u;
} __attribute__((__packed__));