HID: wiimote: Add status request

The wiimote does not send status reports continuously so this adds a helper
function to request a status report and parses the battery charge level.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-wiimote.c b/drivers/hid/hid-wiimote.c
index 66583986bcdbdd2fc8b0d75c9f907abe9264de74..48198cb0fed28aacbeaee350fe9ea0a494d31ef8 100644 (file)
--- a/drivers/hid/hid-wiimote.c
+++ b/drivers/hid/hid-wiimote.c
@@ -41,6 +41,7 @@ struct wiimote_state {
        __u32 opt;
 
        /* results of synchronous requests */
+       __u8 cmd_battery;
        __u8 cmd_err;
 };
 
@@ -83,6 +84,7 @@ enum wiiproto_reqs {
        WIIPROTO_REQ_LED = 0x11,
        WIIPROTO_REQ_DRM = 0x12,
        WIIPROTO_REQ_IR1 = 0x13,
+       WIIPROTO_REQ_SREQ = 0x15,
        WIIPROTO_REQ_WMEM = 0x16,
        WIIPROTO_REQ_RMEM = 0x17,
        WIIPROTO_REQ_IR2 = 0x1a,
@@ -354,6 +356,17 @@ static void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
        wiimote_queue(wdata, cmd, sizeof(cmd));
 }
 
+static void wiiproto_req_status(struct wiimote_data *wdata)
+{
+       __u8 cmd[2];
+
+       cmd[0] = WIIPROTO_REQ_SREQ;
+       cmd[1] = 0;
+
+       wiiproto_keep_rumble(wdata, &cmd[1]);
+       wiimote_queue(wdata, cmd, sizeof(cmd));
+}
+
 static void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
 {
        accel = !!accel;
@@ -805,6 +818,11 @@ static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
 
        /* on status reports the drm is reset so we need to resend the drm */
        wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
+
+       if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_SREQ, 0)) {
+               wdata->state.cmd_battery = payload[5];
+               wiimote_cmd_complete(wdata);
+       }
 }
 
 static void handler_data(struct wiimote_data *wdata, const __u8 *payload)