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From foo@baz Fri Jan 24 11:58:18 PST 2014
Date: Fri, 24 Jan 2014 11:58:18 -0800
To: Greg KH <gregkh@linuxfoundation.org>
From: "Pierre-Loup A. Griffais" <pgriffais@valvesoftware.com>
Subject: [PATCH] Input: xpad: disconnect all Wireless controllers at init
From: "Pierre-Loup A. Griffais" <pgriffais@valvesoftware.com>
We initializing the driver/device, we really don't know how many
controllers are connected. So send a "disconnect all" command to the
base-station, and let the user pair the controllers in the order in
which they want them assigned.
Note, this means we now do not "preallocate" all 4 devices when a single
wireless base station is seen, but require the device to be properly
connected to the base station before that can happen. The allocation of
the device happens in the next patch, not here, so in a way, this patch
breaks all wireless devices...
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/input/joystick/xpad.c | 38 ++++++++++++++++++++++++++++++++++----
1 file changed, 34 insertions(+), 4 deletions(-)
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -1085,11 +1085,41 @@ static int xpad_probe(struct usb_interfa
usb_kill_urb(xpad->irq_in);
goto fail9;
}
+
+ /*
+ * We don't know how to check the controller state at driver
+ * load, so just disconnect them all, requiring the user to
+ * repair the device in the order they want them used. Good
+ * point is that we don't connect devices in "random" order,
+ * but the extra step seems a bit harsh as other operating
+ * systems don't require this at the moment.
+ *
+ * Power-off packet information came from an OS-X
+ * reverse-engineered driver located at:
+ * http://tattiebogle.net/index.php/ProjectRoot/Xbox360Controller/OsxDriver#toc1
+ */
+ mutex_lock(&xpad->odata_mutex);
+ xpad->odata[0] = 0x00;
+ xpad->odata[1] = 0x00;
+ xpad->odata[2] = 0x08;
+ xpad->odata[3] = 0xC0;
+ 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;
+ usb_submit_urb(xpad->irq_out, GFP_KERNEL);
+ mutex_unlock(&xpad->odata_mutex);
+ } else {
+ xpad->pad_present = 1;
+ error = xpad_init_input(xpad);
+ if (error)
+ goto fail9;
}
- xpad->pad_present = 1;
- error = xpad_init_input(xpad);
- if (error)
- goto fail9;
return 0;
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