void usb_endpoint_disable(
const usb_endpoint_t* const endpoint
) {
const uint_fast8_t endpoint_number = usb_endpoint_number(endpoint->address);
if( usb_endpoint_is_in(endpoint->address) ) {
USB0_ENDPTCTRL(endpoint_number) &= ~(USB0_ENDPTCTRL_TXE);
} else {
USB0_ENDPTCTRL(endpoint_number) &= ~(USB0_ENDPTCTRL_RXE);
}
usb_queue_flush_endpoint(endpoint);
usb_endpoint_clear_pending_interrupts(endpoint);
usb_endpoint_flush(endpoint);
}
void usb_endpoint_init(
const usb_endpoint_t* const endpoint
) {
usb_endpoint_flush(endpoint);
uint_fast16_t max_packet_size = endpoint->device->descriptor[7];
usb_transfer_type_t transfer_type = USB_TRANSFER_TYPE_CONTROL;
const uint8_t* const endpoint_descriptor = usb_endpoint_descriptor(endpoint);
if( endpoint_descriptor ) {
max_packet_size = usb_endpoint_descriptor_max_packet_size(endpoint_descriptor);
transfer_type = usb_endpoint_descriptor_transfer_type(endpoint_descriptor);
}
// TODO: There are more capabilities to adjust based on the endpoint
// descriptor.
usb_queue_head_t* const qh = usb_queue_head(endpoint->address, endpoint->device);
qh->capabilities
= USB_QH_CAPABILITIES_MULT(0)
| USB_QH_CAPABILITIES_ZLT
| USB_QH_CAPABILITIES_MPL(max_packet_size)
| ((transfer_type == USB_TRANSFER_TYPE_CONTROL) ? USB_QH_CAPABILITIES_IOS : 0)
;
qh->current_dtd_pointer = 0;
qh->next_dtd_pointer = USB_TD_NEXT_DTD_POINTER_TERMINATE;
qh->total_bytes
= USB_TD_DTD_TOKEN_TOTAL_BYTES(0)
| USB_TD_DTD_TOKEN_MULTO(0)
;
qh->buffer_pointer_page[0] = 0;
qh->buffer_pointer_page[1] = 0;
qh->buffer_pointer_page[2] = 0;
qh->buffer_pointer_page[3] = 0;
qh->buffer_pointer_page[4] = 0;
// This is how we look up an endpoint structure from an endpoint address:
qh->_reserved_0 = (uint32_t)endpoint;
// TODO: Should NAK be enabled? I'm kinda squishy on this...
//USB0_ENDPTNAKEN |=
// USB0_ENDPTNAKEN_EPRNE(1 << endpoint_out->number);
usb_endpoint_set_type(endpoint, transfer_type);
usb_endpoint_enable(endpoint);
}