[PATCH 1/3] Input: xpad - fix support for some third-party controllers

[Vicki Pfau <vi@endrift.com>]

Some third-party controllers, such as the HORPIAD FPS for Nintendo Switch and
Gamesir-G3w, require a specific packet that the first-party XInput driver sends
before it will start sending reports. It's not currently known what this packet
does, but since the first-party driver always sends it's unlikely that this
could cause issues with existing controllers.

Co-authored-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Vicki Pfau <vi@endrift.com>
---
 drivers/input/joystick/xpad.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 403b57e8176b..04af2213407f 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -265,6 +265,7 @@ static const struct xpad_device {
 	{ 0x0f0d, 0x0067, "HORIPAD ONE", 0, XTYPE_XBOXONE },
 	{ 0x0f0d, 0x0078, "Hori Real Arcade Pro V Kai Xbox One", MAP_TRIGGERS_TO_BUTTONS, XTYPE_XBOXONE },
 	{ 0x0f0d, 0x00c5, "Hori Fighting Commander ONE", MAP_TRIGGERS_TO_BUTTONS, XTYPE_XBOXONE },
+	{ 0x0f0d, 0x00dc, "HORIPAD FPS for Nintendo Switch", MAP_TRIGGERS_TO_BUTTONS, XTYPE_XBOX360 },
 	{ 0x0f30, 0x010b, "Philips Recoil", 0, XTYPE_XBOX },
 	{ 0x0f30, 0x0202, "Joytech Advanced Controller", 0, XTYPE_XBOX },
 	{ 0x0f30, 0x8888, "BigBen XBMiniPad Controller", 0, XTYPE_XBOX },
@@ -2020,6 +2021,27 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
 		goto err_free_in_urb;
 	}
 
+	if (xpad->xtype == XTYPE_XBOX360) {
+		/* Some third-party controllers Xbox 360-style controllers
+		 * require this message to finish initialization */
+		uint8_t dummy[20];
+		int ret;
+
+		usb_control_msg_recv(udev, 0,
+				     /* bRequest */ 0x01,
+				     /* bmRequestType */
+				     USB_TYPE_VENDOR | USB_DIR_IN |
+				     USB_RECIP_INTERFACE,
+				     /* wValue */ 0x100,
+				     /* wIndex */ 0x00,
+				     dummy, sizeof(dummy),
+				     25,
+				     GFP_KERNEL);
+		if (ret)
+			dev_warn(&xpad->dev->dev,
+				 "unable to receive magic message: %d\n", ret);
+	}
+
 	ep_irq_in = ep_irq_out = NULL;
 
 	for (i = 0; i < 2; i++) {
-- 
2.39.2