linux-kernel - [PATCH 3.18 22/83] Input: xpad - set the LEDs properly on XBox Wireless controllers

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Message-Id: <20181129140139.318230802@linuxfoundation.org>
Date:   Thu, 29 Nov 2018 15:11:40 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pavel Rojtberg <rojtberg@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 3.18 22/83] Input: xpad - set the LEDs properly on XBox Wireless controllers

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 75b7f05d2798ee3a1cc5bbdd54acd0e318a80396 ]

Based on Patch by Pierre-Loup A. Griffais <pgriffais@...vesoftware.com>:
Add the logic to set the LEDs on XBox Wireless controllers.  Command
sequence found by sniffing the Windows data stream when plugging the
device in.

Updated based on comments on linux-input:
unify codepaths in xpad_send_led_command for wired/ wireless controller.
Also document command values for clarification.
All values tested on Xbox 360 Wireless Controller.

Signed-off-by: Pavel Rojtberg <rojtberg@...il.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/input/joystick/xpad.c | 50 +++++++++++++++++++++++++++++++----
 1 file changed, 45 insertions(+), 5 deletions(-)

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index c4205ed022fd..5606e66ca5a5 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -883,17 +883,57 @@ struct xpad_led {
 	struct usb_xpad *xpad;
 };
 
+/**
+ * @param command
+ *  0: off
+ *  1: all blink, then previous setting
+ *  2: 1/top-left blink, then on
+ *  3: 2/top-right blink, then on
+ *  4: 3/bottom-left blink, then on
+ *  5: 4/bottom-right blink, then on
+ *  6: 1/top-left on
+ *  7: 2/top-right on
+ *  8: 3/bottom-left on
+ *  9: 4/bottom-right on
+ * 10: rotate
+ * 11: blink, based on previous setting
+ * 12: slow blink, based on previous setting
+ * 13: rotate with two lights
+ * 14: persistent slow all blink
+ * 15: blink once, then previous setting
+ */
 static void xpad_send_led_command(struct usb_xpad *xpad, int command)
 {
-	if (command >= 0 && command < 14) {
-		mutex_lock(&xpad->odata_mutex);
+	command %= 16;
+
+	mutex_lock(&xpad->odata_mutex);
+
+	switch (xpad->xtype) {
+	case XTYPE_XBOX360:
 		xpad->odata[0] = 0x01;
 		xpad->odata[1] = 0x03;
 		xpad->odata[2] = command;
 		xpad->irq_out->transfer_buffer_length = 3;
-		usb_submit_urb(xpad->irq_out, GFP_KERNEL);
-		mutex_unlock(&xpad->odata_mutex);
+		break;
+	case XTYPE_XBOX360W:
+		xpad->odata[0] = 0x00;
+		xpad->odata[1] = 0x00;
+		xpad->odata[2] = 0x08;
+		xpad->odata[3] = 0x40 + command;
+		xpad->odata[4] = 0x00;
+		xpad->odata[5] = 0x00;
+		xpad->odata[6] = 0x00;
+		xpad->odata[7] = 0x00;
+		xpad->odata[8] = 0x00;
+		xpad->odata[9] = 0x00;
+		xpad->odata[10] = 0x00;
+		xpad->odata[11] = 0x00;
+		xpad->irq_out->transfer_buffer_length = 12;
+		break;
 	}
+
+	usb_submit_urb(xpad->irq_out, GFP_KERNEL);
+	mutex_unlock(&xpad->odata_mutex);
 }
 
 static void xpad_led_set(struct led_classdev *led_cdev,
@@ -913,7 +953,7 @@ static int xpad_led_probe(struct usb_xpad *xpad)
 	struct led_classdev *led_cdev;
 	int error;
 
-	if (xpad->xtype != XTYPE_XBOX360)
+	if (xpad->xtype != XTYPE_XBOX360 && xpad->xtype != XTYPE_XBOX360W)
 		return 0;
 
 	xpad->led = led = kzalloc(sizeof(struct xpad_led), GFP_KERNEL);
-- 
2.17.1