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1.1 root 1: /*
2: * Copyright (C) 2011 Michael Brown <[email protected]>.
3: *
4: * This program is free software; you can redistribute it and/or
5: * modify it under the terms of the GNU General Public License as
6: * published by the Free Software Foundation; either version 2 of the
7: * License, or any later version.
8: *
9: * This program is distributed in the hope that it will be useful, but
10: * WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * General Public License for more details.
13: *
14: * You should have received a copy of the GNU General Public License
15: * along with this program; if not, write to the Free Software
16: * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17: */
18:
19: FILE_LICENCE ( GPL2_OR_LATER );
20:
21: #include <stddef.h>
22: #include <stdio.h>
23: #include <ipxe/efi/efi.h>
24: #include <ipxe/efi/Protocol/DriverBinding.h>
25: #include <ipxe/efi/Protocol/ComponentName2.h>
26: #include <ipxe/efi/efi_strings.h>
27: #include <ipxe/efi/efi_driver.h>
28: #include <config/general.h>
29:
30: /** @file
31: *
32: * EFI driver interface
33: *
34: */
35:
36: /** EFI driver binding protocol GUID */
37: static EFI_GUID efi_driver_binding_protocol_guid
38: = EFI_DRIVER_BINDING_PROTOCOL_GUID;
39:
40: /** EFI component name protocol GUID */
41: static EFI_GUID efi_component_name2_protocol_guid
42: = EFI_COMPONENT_NAME2_PROTOCOL_GUID;
43:
44: /**
45: * Find end of device path
46: *
47: * @v path Path to device
48: * @ret path_end End of device path
49: */
50: EFI_DEVICE_PATH_PROTOCOL * efi_devpath_end ( EFI_DEVICE_PATH_PROTOCOL *path ) {
51:
52: while ( path->Type != END_DEVICE_PATH_TYPE ) {
53: path = ( ( ( void * ) path ) +
54: /* There's this amazing new-fangled thing known as
55: * a UINT16, but who wants to use one of those? */
56: ( ( path->Length[1] << 8 ) | path->Length[0] ) );
57: }
58:
59: return path;
60: }
61:
62: /**
63: * Look up driver name
64: *
65: * @v wtf Component name protocol
66: * @v language Language to use
67: * @v driver_name Driver name to fill in
68: * @ret efirc EFI status code
69: */
70: static EFI_STATUS EFIAPI
71: efi_driver_get_driver_name ( EFI_COMPONENT_NAME2_PROTOCOL *wtf,
72: CHAR8 *language __unused, CHAR16 **driver_name ) {
73: struct efi_driver *efidrv =
74: container_of ( wtf, struct efi_driver, wtf );
75:
76: *driver_name = efidrv->wname;
77: return 0;
78: }
79:
80: /**
81: * Look up controller name
82: *
83: * @v wtf Component name protocol
84: * @v device Device
85: * @v child Child device, or NULL
86: * @v language Language to use
87: * @v driver_name Device name to fill in
88: * @ret efirc EFI status code
89: */
90: static EFI_STATUS EFIAPI
91: efi_driver_get_controller_name ( EFI_COMPONENT_NAME2_PROTOCOL *wtf __unused,
92: EFI_HANDLE device __unused,
93: EFI_HANDLE child __unused,
94: CHAR8 *language __unused,
95: CHAR16 **controller_name __unused ) {
96:
97: /* Just let EFI use the default Device Path Name */
98: return EFI_UNSUPPORTED;
99: }
100:
101: /**
102: * Install EFI driver
103: *
104: * @v efidrv EFI driver
105: * @ret efirc EFI status code
106: */
107: EFI_STATUS efi_driver_install ( struct efi_driver *efidrv ) {
108: EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
109: EFI_DRIVER_BINDING_PROTOCOL *driver = &efidrv->driver;
110: EFI_COMPONENT_NAME2_PROTOCOL *wtf = &efidrv->wtf;
111: EFI_STATUS efirc;
112:
113: /* Configure driver binding protocol */
114: driver->ImageHandle = efi_image_handle;
115:
116: /* Configure component name protocol */
117: wtf->GetDriverName = efi_driver_get_driver_name;
118: wtf->GetControllerName = efi_driver_get_controller_name;
119: wtf->SupportedLanguages = "en";
120:
121: /* Fill in driver name */
122: efi_snprintf ( efidrv->wname,
123: ( sizeof ( efidrv->wname ) /
124: sizeof ( efidrv->wname[0] ) ),
125: PRODUCT_SHORT_NAME " - %s", efidrv->name );
126:
127: /* Install driver */
128: if ( ( efirc = bs->InstallMultipleProtocolInterfaces (
129: &driver->DriverBindingHandle,
130: &efi_driver_binding_protocol_guid, driver,
131: &efi_component_name2_protocol_guid, wtf,
132: NULL ) ) != 0 ) {
133: DBGC ( efidrv, "EFIDRV %s could not install protocol: %s\n",
134: efidrv->name, efi_strerror ( efirc ) );
135: return efirc;
136: }
137:
138: DBGC ( efidrv, "EFIDRV %s installed\n", efidrv->name );
139: return 0;
140: }
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