/* * 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; }