| /* | |
| * Copyright 2012 Red Hat Inc. | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a | |
| * copy of this software and associated documentation files (the "Software"), | |
| * to deal in the Software without restriction, including without limitation | |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
| * and/or sell copies of the Software, and to permit persons to whom the | |
| * Software is furnished to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included in | |
| * all copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
| * OTHER DEALINGS IN THE SOFTWARE. | |
| * | |
| * Authors: Ben Skeggs | |
| */ | |
| #include <subdev/bios.h> | |
| #include <subdev/bios/bit.h> | |
| int | |
| bit_entry(struct nvkm_bios *bios, u8 id, struct bit_entry *bit) | |
| { | |
| if (likely(bios->bit_offset)) { | |
| u8 entries = nvbios_rd08(bios, bios->bit_offset + 10); | |
| u32 entry = bios->bit_offset + 12; | |
| while (entries--) { | |
| if (nvbios_rd08(bios, entry + 0) == id) { | |
| bit->id = nvbios_rd08(bios, entry + 0); | |
| bit->version = nvbios_rd08(bios, entry + 1); | |
| bit->length = nvbios_rd16(bios, entry + 2); | |
| bit->offset = nvbios_rd16(bios, entry + 4); | |
| return 0; | |
| } | |
| entry += nvbios_rd08(bios, bios->bit_offset + 9); | |
| } | |
| return -ENOENT; | |
| } | |
| return -EINVAL; | |
| } |