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@xxxxxxxxxxxxxx>
---
drivers/hid/uhid.c | 18 ++++++++++++++++++
include/linux/uhid.h | 8 ++++++++
2 files changed, 26 insertions(+)
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 0226ba3f..4dd693e 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -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;
}
diff --git a/include/linux/uhid.h b/include/linux/uhid.h
index 351650b..3fa4849 100644
--- a/include/linux/uhid.h
+++ b/include/linux/uhid.h
@@ -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__));
--
1.7.10.4
--
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