mirror of https://github.com/ipxe/ipxe.git
144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
/*
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* Copyright (C) 2011 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stddef.h>
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#include <stdio.h>
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#include <ipxe/efi/efi.h>
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#include <ipxe/efi/Protocol/DriverBinding.h>
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#include <ipxe/efi/Protocol/ComponentName2.h>
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#include <ipxe/efi/efi_driver.h>
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#include <config/general.h>
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/** @file
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*
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* EFI driver interface
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*
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*/
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/** EFI driver binding protocol GUID */
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static EFI_GUID efi_driver_binding_protocol_guid
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= EFI_DRIVER_BINDING_PROTOCOL_GUID;
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/** EFI component name protocol GUID */
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static EFI_GUID efi_component_name2_protocol_guid
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= EFI_COMPONENT_NAME2_PROTOCOL_GUID;
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/**
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* Find end of device path
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*
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* @v path Path to device
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* @ret path_end End of device path
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*/
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EFI_DEVICE_PATH_PROTOCOL * efi_devpath_end ( EFI_DEVICE_PATH_PROTOCOL *path ) {
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while ( path->Type != END_DEVICE_PATH_TYPE ) {
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path = ( ( ( void * ) path ) +
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/* There's this amazing new-fangled thing known as
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* a UINT16, but who wants to use one of those? */
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( ( path->Length[1] << 8 ) | path->Length[0] ) );
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}
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return path;
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}
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/**
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* Look up driver name
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*
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* @v wtf Component name protocol
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* @v language Language to use
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* @v driver_name Driver name to fill in
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* @ret efirc EFI status code
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*/
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static EFI_STATUS EFIAPI
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efi_driver_get_driver_name ( EFI_COMPONENT_NAME2_PROTOCOL *wtf,
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CHAR8 *language __unused, CHAR16 **driver_name ) {
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struct efi_driver *efidrv =
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container_of ( wtf, struct efi_driver, wtf );
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*driver_name = efidrv->wname;
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return 0;
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}
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/**
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* Look up controller name
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*
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* @v wtf Component name protocol
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* @v device Device
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* @v child Child device, or NULL
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* @v language Language to use
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* @v driver_name Device name to fill in
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* @ret efirc EFI status code
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*/
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static EFI_STATUS EFIAPI
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efi_driver_get_controller_name ( EFI_COMPONENT_NAME2_PROTOCOL *wtf __unused,
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EFI_HANDLE device __unused,
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EFI_HANDLE child __unused,
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CHAR8 *language __unused,
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CHAR16 **controller_name __unused ) {
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/* Just let EFI use the default Device Path Name */
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return EFI_UNSUPPORTED;
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}
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/**
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* Install EFI driver
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*
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* @v efidrv EFI driver
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* @ret efirc EFI status code
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*/
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EFI_STATUS efi_driver_install ( struct efi_driver *efidrv ) {
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EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
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EFI_DRIVER_BINDING_PROTOCOL *driver = &efidrv->driver;
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EFI_COMPONENT_NAME2_PROTOCOL *wtf = &efidrv->wtf;
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char buf[ sizeof ( efidrv->wname ) / sizeof ( efidrv->wname[0] ) ];
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unsigned int i;
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EFI_STATUS efirc;
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/* Configure driver binding protocol */
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driver->ImageHandle = efi_image_handle;
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/* Configure component name protocol */
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wtf->GetDriverName = efi_driver_get_driver_name;
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wtf->GetControllerName = efi_driver_get_controller_name;
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wtf->SupportedLanguages = "en";
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/* Fill in driver name */
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snprintf ( buf, sizeof ( buf ), PRODUCT_SHORT_NAME " - %s",
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efidrv->name );
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for ( i = 0 ; i < sizeof ( buf ) ; i++ ) {
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/* Damn Unicode names */
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efidrv->wname[i] = *( ( ( unsigned char * ) buf ) + i );
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}
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/* Install driver */
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if ( ( efirc = bs->InstallMultipleProtocolInterfaces (
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&driver->DriverBindingHandle,
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&efi_driver_binding_protocol_guid, driver,
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&efi_component_name2_protocol_guid, wtf,
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NULL ) ) != 0 ) {
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DBGC ( efidrv, "EFIDRV %s could not install protocol: %s\n",
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efidrv->name, efi_strerror ( efirc ) );
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return efirc;
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}
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DBGC ( efidrv, "EFIDRV %s installed\n", efidrv->name );
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return 0;
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}
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