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Input: xpad - query wireless controller state at init

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When we initialize the driver/device, we really don't know how many
controllers are connected.  So send a "query presence" command to the
base-station. (Command discovered by Zachary Lund)

Presence packet taken from:

https://github.com/computerquip/xpad5

Signed-off-by: Pavel Rojtberg <rojtberg@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Pavel Rojtberg 2015-10-10 09:36:17 -07:00 committed by Dmitry Torokhov
parent b8154002cb
commit aba54876bb
1 changed files with 40 additions and 0 deletions
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40
drivers/input/joystick/xpad.c
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@ -768,6 +768,33 @@ static void xpad_deinit_output(struct usb_xpad *xpad)
}
}
static int xpad_inquiry_pad_presence(struct usb_xpad *xpad)
{
int retval;
mutex_lock(&xpad->odata_mutex);
xpad->odata[0] = 0x08;
xpad->odata[1] = 0x00;
xpad->odata[2] = 0x0F;
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;
retval = usb_submit_urb(xpad->irq_out, GFP_KERNEL);
mutex_unlock(&xpad->odata_mutex);
return retval;
}
#ifdef CONFIG_JOYSTICK_XPAD_FF
static int xpad_play_effect(struct input_dev *dev, void *data, struct ff_effect *effect)
{
@ -1259,9 +1286,22 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
error = usb_submit_urb(xpad->irq_in, GFP_KERNEL);
if (error)
goto err_deinit_input;
/*
* Send presence packet.
* This will force the controller to resend connection packets.
* This is useful in the case we activate the module after the
* adapter has been plugged in, as it won't automatically
* send us info about the controllers.
*/
error = xpad_inquiry_pad_presence(xpad);
if (error)
goto err_kill_in_urb;
}
return 0;
err_kill_in_urb:
usb_kill_urb(xpad->irq_in);
err_deinit_input:
xpad_deinit_input(xpad);
err_deinit_output: