diff options
| author |   Pavel Rojtberg <rojtberg@gmail.com> | 2015-10-10 09:36:17 -0700 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-10-10 11:27:42 -0700 |
| commit | aba54876bb38dde81abead1ed1936eb04fa30ca9 (patch) | |
| tree | 33604411a8a2601a87320ccdce08ef4d2d474b70 /drivers/input | |
| parent | Input: xpad - move the input device creation to a new function (diff) | |
| download | linux-dev-aba54876bb38dde81abead1ed1936eb04fa30ca9.tar.xz linux-dev-aba54876bb38dde81abead1ed1936eb04fa30ca9.zip | |
Input: xpad - query wireless controller state at init
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>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/joystick/xpad.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c index 486db7a1d99a..d382d48d6750 100644 --- a/drivers/input/joystick/xpad.c +++ b/drivers/input/joystick/xpad.c @@ -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: |