| /* |
| * 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; |
| } |
