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#include "hid-tminit.h"
static void tminit_callback(struct urb *urb){
hid_info(urb->dev, "urb status %d received\n", urb->status);
}
/* for some godawful reason these interrupts are absolutely necessary, otherwise
* the whole kernel crashes. I have no idea why.
* */
static void tminit_interrupts(struct hid_device *hdev){
int ret, trans, i, b_ep;
u8 *send_buf = kmalloc(256, GFP_KERNEL);
struct usb_host_endpoint *ep;
struct device *dev = &hdev->dev;
struct usb_interface *usbif = to_usb_interface(dev->parent);
struct usb_device *usbdev = interface_to_usbdev(usbif);
ep = &usbif->cur_altsetting->endpoint[1];
b_ep = ep->desc.bEndpointAddress;
for(i = 0; i < ARRAY_SIZE(setup_arr); ++i){
memcpy(send_buf, setup_arr[i], setup_arr_sizes[i]);
ret = usb_interrupt_msg(usbdev,
usb_sndintpipe(usbdev, b_ep),
send_buf,
setup_arr_sizes[i],
&trans,
USB_CTRL_SET_TIMEOUT);
if(ret){
hid_err(hdev, "setup data couldn't be sent\n");
return;
}
}
kzfree(send_buf);
}
int tminit(struct hid_device *hdev){
struct urb *urb;
u8 *setup_packet, *transfer_buffer;
struct device *dev = &hdev->dev;
struct usb_interface *usbif = to_usb_interface(dev->parent);
struct usb_device *usbdev = interface_to_usbdev(usbif);
int ret;
tminit_interrupts(hdev);
setup_packet = kmalloc(8, GFP_ATOMIC);
transfer_buffer = kmalloc(8, GFP_ATOMIC);
memcpy(setup_packet, hw_rq_out, 8);
memcpy(transfer_buffer, hw_rq_in, 8);
urb = usb_alloc_urb(0, GFP_ATOMIC);
usb_fill_control_urb(urb,
usbdev,
usb_sndctrlpipe(usbdev, 0),
setup_packet,
transfer_buffer,
8,
tminit_callback,
hdev);
/* we sort of have to go on faith that the message is sent, because the
* wheel usually completely dies as soon as it receives the message.
* No need to even check the return value.
*/
ret = usb_submit_urb(urb, GFP_ATOMIC);
kfree(setup_packet);
kfree(transfer_buffer);
return ret;
}
static void tminit_remove(struct hid_device *hdev){
/* we are dead, hopefully without any serious side effects */
hid_hw_stop(hdev);
}
static int tminit_probe(struct hid_device *hdev, const struct hid_device_id *id){
int ret;
ret = hid_parse(hdev);
if(ret){
hid_err(hdev, "parse failed\n");
goto err;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
if(ret){
hid_err(hdev, "hw start failed\n");
goto err;
}
ret = tminit(hdev);
if(ret){
hid_err(hdev, "tminit exited, error might be intended behaviour\n");
goto err;
}
err:
return ret;
}
static const struct hid_device_id tminit_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65d)},
{}
};
MODULE_DEVICE_TABLE(hid, tminit_devices);
static struct hid_driver tminit_driver = {
.name = "thrustmaster init",
.id_table = tminit_devices,
.probe = tminit_probe,
.remove = tminit_remove,
};
module_hid_driver(tminit_driver);
MODULE_LICENSE("GPL");
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