// KernelDriverActive determines if a kernel driver is active on iface
func (d *Device) KernelDriverActive(iface uint8) (bool, error) {
r := C.libusb_kernel_driver_active(d.handle, C.int(iface))
if r < 0 {
return false, usbError(r)
}
return r == 1, nil
}
// detachKernelDriver detaches any active kernel drivers, if supported by the platform.
// If there are any errors, like Context.ListDevices, only the final one will be returned.
func (d *Device) detachKernelDriver() (err error) {
for _, cfg := range d.Configs {
for _, iface := range cfg.Interfaces {
switch activeErr := C.libusb_kernel_driver_active(d.handle, C.int(iface.Number)); activeErr {
case C.LIBUSB_ERROR_NOT_SUPPORTED:
// no need to do any futher checking, no platform support
return
case 0:
continue
case 1:
switch detachErr := C.libusb_detach_kernel_driver(d.handle, C.int(iface.Number)); detachErr {
case C.LIBUSB_ERROR_NOT_SUPPORTED:
// shouldn't ever get here, should be caught by the outer switch
return
case 0:
d.detached[iface.Number]++
case C.LIBUSB_ERROR_NOT_FOUND:
// this status is returned if libusb's driver is already attached to the device
d.detached[iface.Number]++
default:
err = fmt.Errorf("usb: detach kernel driver: %s", usbError(detachErr))
}
default:
err = fmt.Errorf("usb: active kernel driver check: %s", usbError(activeErr))
}
}
}
return
}
func (i *Interface) IsKernelDriverActive() (bool, *UsbError) {
v, err := decodeUsbError(C.libusb_kernel_driver_active(i.handle.handle, i.num))
if err != nil {
return false, err
}
return (v == 1), nil
}
// Determine if a kernel driver is active on an interface.
func (h *DeviceHandle) KernelDriverActive(ifaceNum byte) (bool, error) {
ret := C.libusb_kernel_driver_active(h.me(), C.int(ifaceNum))
if ret == 0 {
return false, nil
}
if ret == 1 {
return true, nil
}
return false, toErr(ret)
}
// Detach from kernel if kernel attached a driver to the device.
// If it's attached, C.libusb_kernel_driver_active returns 1.
func (d *Device) DetachKernelDriver(iface uint8) error {
if C.libusb_kernel_driver_active(d.handle, C.int(iface)) != 1 {
return nil
}
errno := C.libusb_detach_kernel_driver(d.handle, C.int(iface))
if errno != 0 {
return usbError(errno)
}
return nil
}
func Start(color chan byte, output chan guinput.KeyEvent) *C.struct_libusb_device_handle {
C.libusb_init(nil)
fmt.Println(KEYMAP[0x21])
key_device_handle := C.libusb_open_device_with_vid_pid(nil, 0x046d, 0xc22d)
//detach any necessary kernel drivers from MY keyboard
if C.libusb_kernel_driver_active(key_device_handle, 0) == 1 {
log.Print("kernel driver active on main interface")
e := C.libusb_detach_kernel_driver(key_device_handle, 0)
if e != 0 {
log.Fatal("Can't detach kernel driver")
}
}
if C.libusb_kernel_driver_active(key_device_handle, 1) == 1 {
fmt.Println("kernel driver active")
e := C.libusb_detach_kernel_driver(key_device_handle, 1)
if e != 0 {
log.Fatal("Can't detach kernel driver")
}
}
//Claim the interfaces we'll be listening on
r := C.libusb_claim_interface(key_device_handle, 0)
if r != 0 {
log.Fatal("Can't claim main interface")
}
r = C.libusb_claim_interface(key_device_handle, 1)
if r != 0 {
log.Fatal("Can't claim special interface")
}
log.Print("Starting libusb goroutines\n")
go ColorChange(key_device_handle, color)
//go LCDChange(key_device_handle, lcd)
go NormalKeyMonitor(key_device_handle, output)
go SpecialKeyMonitor(key_device_handle, output)
log.Print("Libusb Goroutines started\n")
return key_device_handle
}
func StartLibUsb() error {
Connected = true
key_device_handle := C.libusb_open_device_with_vid_pid(nil, 0x046d, 0xc22d)
if key_device_handle != nil {
if C.libusb_kernel_driver_active(key_device_handle, 1) == 1 {
e := C.libusb_detach_kernel_driver(key_device_handle, 1)
if e != 0 {
log.Fatal("Can't detach kernel driver")
}
}
r := C.libusb_claim_interface(key_device_handle, 1)
if r != 0 {
log.Fatal("Can't claim special interface")
}
keyboardHandle = key_device_handle
return nil
}
return errors.New("could not open driver")
}
func (d *Device) OpenEndpoint(conf, iface, setup, epoint uint8) (Endpoint, error) {
end := &endpoint{
Device: d,
}
var setAlternate bool
for _, c := range d.Configs {
if c.Config != conf {
continue
}
debug.Printf("found conf: %#v\n", c)
for _, i := range c.Interfaces {
if i.Number != iface {
continue
}
debug.Printf("found iface: %#v\n", i)
for i, s := range i.Setups {
if s.Alternate != setup {
continue
}
setAlternate = i != 0
debug.Printf("found setup: %#v [default: %v]\n", s, !setAlternate)
for _, e := range s.Endpoints {
debug.Printf("ep %02x search: %#v\n", epoint, s)
if e.Address != epoint {
continue
}
end.InterfaceSetup = s
end.EndpointInfo = e
switch tt := TransferType(e.Attributes) & TRANSFER_TYPE_MASK; tt {
case TRANSFER_TYPE_BULK:
end.xfer = bulk_xfer
case TRANSFER_TYPE_INTERRUPT:
end.xfer = interrupt_xfer
case TRANSFER_TYPE_ISOCHRONOUS:
end.xfer = isochronous_xfer
default:
return nil, fmt.Errorf("usb: %s transfer is unsupported", tt)
}
goto found
}
return nil, fmt.Errorf("usb: unknown endpoint %02x", epoint)
}
return nil, fmt.Errorf("usb: unknown setup %02x", setup)
}
return nil, fmt.Errorf("usb: unknown interface %02x", iface)
}
return nil, fmt.Errorf("usb: unknown configuration %02x", conf)
found:
// Set the configuration
var activeConf C.int
if errno := C.libusb_get_configuration(d.handle, &activeConf); errno < 0 {
return nil, fmt.Errorf("usb: getcfg: %s", usbError(errno))
}
if int(activeConf) != int(conf) {
if errno := C.libusb_set_configuration(d.handle, C.int(conf)); errno < 0 {
return nil, fmt.Errorf("usb: setcfg: %s", usbError(errno))
}
}
// Enable detachment of kernel driver if platform supported
if errno := C.libusb_kernel_driver_active(d.handle, C.int(iface)); errno == 1 {
if errno := C.libusb_detach_kernel_driver(d.handle, C.int(iface)); errno != 0 {
return nil, fmt.Errorf("usb: detach: %s", usbError(errno))
}
}
// Claim the interface
if errno := C.libusb_claim_interface(d.handle, C.int(iface)); errno < 0 {
return nil, fmt.Errorf("usb: claim: %s", usbError(errno))
}
// Increment the claim count
d.lock.Lock()
d.claimed[iface]++
d.lock.Unlock() // unlock immediately because the next calls may block
// Choose the alternate
if setAlternate {
if errno := C.libusb_set_interface_alt_setting(d.handle, C.int(iface), C.int(setup)); errno < 0 {
debug.Printf("altsetting error: %s", usbError(errno))
return nil, fmt.Errorf("usb: setalt: %s", usbError(errno))
}
}
return end, nil
}