/*
bi_udc_init - initialize USB Device Controller
This function is called for each physical bus interface that is found.
Register an interrupt handler and IO region. Return non-zero for error.
*/
int bi_udc_init()
{
dbg_init(1,"Loading %s", udc_name());
bi_driver.name = udc_name();
bi_driver.max_endpoints = udc_max_endpoints();
bi_driver.maxpacketsize = udc_ep0_packetsize();
dbg_init(1,"name: %s endpoints: %d ep0: %d", bi_driver.name, bi_driver.max_endpoints, bi_driver.maxpacketsize);
// request device IRQ.
if (udc_request_udc_irq()) {
dbg_init(0,"name: %s request udc irq failed", udc_name());
return -EINVAL;
}
// request device IO
if (udc_request_io()) {
udc_release_udc_irq();
dbg_init(0,"name: %s request udc io failed", udc_name());
return -EINVAL;
}
if (udc_init()) {
udc_release_udc_irq();
udc_release_io();
dbg_init(1,"name: %s probe failed", udc_name());
return -EINVAL;
}
return 0;
}
/**
* bi_udc_init - initialize USB Device Controller
*
* Get ready to use the USB Device Controller.
*
* Register an interrupt handler and IO region. Return non-zero for error.
*/
int bi_udc_init (void)
{
dbg_init (1, "Loading %s", udc_name ());
bi_driver.name = udc_name ();
bi_driver.max_endpoints = udc_max_endpoints ();
bi_driver.maxpacketsize = udc_ep0_packetsize ();
dbg_init (1, "name: %s endpoints: %d ep0: %d", bi_driver.name, bi_driver.max_endpoints,
bi_driver.maxpacketsize);
// request device IRQ
if (udc_request_udc_irq ()) {
dbg_init (0, "name: %s request udc irq failed", udc_name ());
return -EINVAL;
}
// request device IO
if (udc_request_io ()) {
udc_release_udc_irq ();
dbg_init (0, "name: %s request udc io failed", udc_name ());
return -EINVAL;
}
// probe for device
if (udc_init ()) {
udc_release_udc_irq ();
udc_release_io ();
dbg_init (1, "name: %s probe failed", udc_name ());
return -EINVAL;
}
// optional cable IRQ
have_cable_irq = !udc_request_cable_irq ();
dbg_init (1, "name: %s request cable irq %d", udc_name (), have_cable_irq);
return 0;
}
/**
* bi_udc_exit - Stop using the USB Device Controller
*
* Stop using the USB Device Controller.
*
* Shutdown and free dma channels, de-register the interrupt handler.
*/
void bi_udc_exit(void)
{
int i;
dbg_init(1, "Unloading %s", udc_name());
for (i = 0; i < udc_max_endpoints(); i++) {
udc_disable_ep(i);
}
// free io and irq
udc_disconnect();
udc_disable();
udc_release_io();
udc_release_udc_irq();
if (have_cable_irq) {
udc_release_cable_irq();
}
}