source: mainline/uspace/drv/uhci/uhci.c@ f9dd44d

#include <errno.h>
#include <usb/debug.h>
#include <usb/usb.h>

#include "debug.h"
#include "name.h"
#include "uhci.h"

int uhci_init(device_t *device, void *regs)
{
        assert( device );
        uhci_print_info( "Initializing device at address %p\n", device);

        /* create instance */
        uhci_t *instance = malloc( sizeof(uhci_t) );
        if (!instance)
                { return ENOMEM; }
        memset( instance, 0, sizeof(uhci_t) );

        /* init address keeper(libusb) */
        usb_address_keeping_init( &instance->address_manager, USB11_ADDRESS_MAX );

        /* allow access to hc control registers */
        regs_t *io;
        int ret = pio_enable( regs, sizeof(regs_t), (void**)&io);
        if (ret < 0) {
                free( instance );
                printf(NAME": Failed to gain access to registers at %p\n", io);
                return ret;
        }
        instance->registers = io;

        /* init root hub */
        ret = uhci_root_hub_init( &instance->root_hub, device,
          (char*)regs + UHCI_ROOT_HUB_PORT_REGISTERS_OFFSET );
        if (ret < 0) {
                free( instance );
                printf(NAME": Failed to initialize root hub driver.\n");
                return ret;
        }

        device->driver_data = instance;
        return EOK;
}
/*----------------------------------------------------------------------------*/
int uhci_in(
  device_t *dev,
        usb_target_t target,
        usb_transfer_type_t transfer_type,
        void *buffer, size_t size,
        usbhc_iface_transfer_in_callback_t callback, void *arg
        )
{
        uhci_print_info( "transfer IN [%d.%d (%s); %zu]\n",
            target.address, target.endpoint,
            usb_str_transfer_type(transfer_type),
            size);

        callback( dev, 0, USB_OUTCOME_OK, arg );

        return EOK;
}
/*----------------------------------------------------------------------------*/
int uhci_out(
  device_t *dev,
  usb_target_t target,
  usb_transfer_type_t transfer_type,
  void *buffer, size_t size,
        usbhc_iface_transfer_out_callback_t callback, void *arg
  )
{
        uhci_print_info( "transfer OUT [%d.%d (%s); %zu]\n",
            target.address, target.endpoint,
            usb_str_transfer_type(transfer_type),
            size);

        callback( dev, USB_OUTCOME_OK, arg );
        return EOK;
}
/*----------------------------------------------------------------------------*/
int uhci_setup(
  device_t *dev,
  usb_target_t target,
  usb_transfer_type_t transfer_type,
  void *buffer, size_t size,
  usbhc_iface_transfer_out_callback_t callback, void *arg
  )
{
        uhci_print_info( "transfer SETUP [%d.%d (%s); %zu]\n",
            target.address, target.endpoint,
            usb_str_transfer_type(transfer_type),
            size);

        callback( dev, USB_OUTCOME_OK, arg );
        return EOK;
}
/*----------------------------------------------------------------------------*/