From c01b5e7464f0cf20936d7467c7528163c4e2782d Mon Sep 17 00:00:00 2001 From: Cameron Gutman Date: Tue, 3 Jan 2017 22:40:38 -0800 Subject: [PATCH] Input: xpad - don't depend on endpoint order The order of endpoints is well defined on official Xbox pads, but we have found at least one 3rd-party pad that doesn't follow the standard ("Titanfall 2 Xbox One controller" 0e6f:0165). Fortunately, we get lucky with this specific pad because it uses endpoint addresses that differ only by direction. We know that there are other pads out where this is not true, so let's go ahead and fix this. Signed-off-by: Cameron Gutman Signed-off-by: Dmitry Torokhov --- drivers/input/joystick/xpad.c | 35 +++++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 14 deletions(-) diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c index 3f6130e0f9c1..c06b717139ad 100644 --- a/drivers/input/joystick/xpad.c +++ b/drivers/input/joystick/xpad.c @@ -836,10 +836,9 @@ static void xpad_irq_out(struct urb *urb) spin_unlock_irqrestore(&xpad->odata_lock, flags); } -static int xpad_init_output(struct usb_interface *intf, struct usb_xpad *xpad) +static int xpad_init_output(struct usb_interface *intf, struct usb_xpad *xpad, + struct usb_endpoint_descriptor *ep_irq_out) { - struct usb_endpoint_descriptor *ep_irq_out; - int ep_irq_out_idx; int error; if (xpad->xtype == XTYPE_UNKNOWN) @@ -860,10 +859,6 @@ static int xpad_init_output(struct usb_interface *intf, struct usb_xpad *xpad) goto err_free_coherent; } - /* Xbox One controller has in/out endpoints swapped. */ - ep_irq_out_idx = xpad->xtype == XTYPE_XBOXONE ? 0 : 1; - ep_irq_out = &intf->cur_altsetting->endpoint[ep_irq_out_idx].desc; - usb_fill_int_urb(xpad->irq_out, xpad->udev, usb_sndintpipe(xpad->udev, ep_irq_out->bEndpointAddress), xpad->odata, XPAD_PKT_LEN, @@ -1447,8 +1442,7 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id { struct usb_device *udev = interface_to_usbdev(intf); struct usb_xpad *xpad; - struct usb_endpoint_descriptor *ep_irq_in; - int ep_irq_in_idx; + struct usb_endpoint_descriptor *ep_irq_in, *ep_irq_out; int i, error; if (intf->cur_altsetting->desc.bNumEndpoints != 2) @@ -1518,13 +1512,26 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id goto err_free_in_urb; } - error = xpad_init_output(intf, xpad); - if (error) + ep_irq_in = ep_irq_out = NULL; + + for (i = 0; i < 2; i++) { + struct usb_endpoint_descriptor *ep = + &intf->cur_altsetting->endpoint[i].desc; + + if (usb_endpoint_dir_in(ep)) + ep_irq_in = ep; + else + ep_irq_out = ep; + } + + if (!ep_irq_in || !ep_irq_out) { + error = -ENODEV; goto err_free_in_urb; + } - /* Xbox One controller has in/out endpoints swapped. */ - ep_irq_in_idx = xpad->xtype == XTYPE_XBOXONE ? 1 : 0; - ep_irq_in = &intf->cur_altsetting->endpoint[ep_irq_in_idx].desc; + error = xpad_init_output(intf, xpad, ep_irq_out); + if (error) + goto err_free_in_urb; usb_fill_int_urb(xpad->irq_in, udev, usb_rcvintpipe(udev, ep_irq_in->bEndpointAddress), -- 2.20.1