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Commit 33e84013 authored by David Herrmann's avatar David Herrmann Committed by Jiri Kosina
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HID: wiimote: Add write-register helpers 



Add helpers to synchronously write registers of the wiimote. This is heavily
used by initialization functions for wiimote peripherals.

Signed-off-by: default avatarDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 29d28064

drivers/hid/hid-wiimote.c

+27 −1
Original line number Diff line number Diff line
@@ -39,6 +39,9 @@ struct wiimote_state { 
	struct completion ready;

	int cmd;

	__u32 opt;



	/* results of synchronous requests */

	__u8 cmd_err;

};



struct wiimote_data {
@@ -394,6 +397,25 @@ static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom, 
	wiimote_queue(wdata, cmd, sizeof(cmd));

}



/* requries the cmd-mutex to be held */

static int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,

						const __u8 *wmem, __u8 size)

{

	unsigned long flags;

	int ret;



	spin_lock_irqsave(&wdata->state.lock, flags);

	wiimote_cmd_set(wdata, WIIPROTO_REQ_WMEM, 0);

	wiiproto_req_wreg(wdata, offset, wmem, size);

	spin_unlock_irqrestore(&wdata->state.lock, flags);



	ret = wiimote_cmd_wait(wdata);

	if (!ret && wdata->state.cmd_err)

		ret = -EIO;



	return ret;

}



static enum led_brightness wiimote_leds_get(struct led_classdev *led_dev)

{

	struct wiimote_data *wdata;
@@ -635,10 +657,14 @@ static void handler_return(struct wiimote_data *wdata, const __u8 *payload) 


	handler_keys(wdata, payload);



	if (err)

	if (wiimote_cmd_pending(wdata, cmd, 0)) {

		wdata->state.cmd_err = err;

		wiimote_cmd_complete(wdata);

	} else if (err) {

		hid_warn(wdata->hdev, "Remote error %hhu on req %hhu\n", err,

									cmd);

	}

}



static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)

{