| /* |
| * Copyright 2012 Nouveau Community |
| * |
| * 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: Martin Peres |
| */ |
| |
| #include <subdev/bios.h> |
| #include <subdev/bios/bit.h> |
| #include <subdev/bios/perf.h> |
| |
| static u16 |
| perf_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
| { |
| struct bit_entry bit_P; |
| u16 perf = 0x0000; |
| |
| if (!bit_entry(bios, 'P', &bit_P)) { |
| if (bit_P.version <= 2) { |
| perf = nv_ro16(bios, bit_P.offset + 0); |
| if (perf) { |
| *ver = nv_ro08(bios, perf + 0); |
| *hdr = nv_ro08(bios, perf + 1); |
| } |
| } else |
| nv_error(bios, "unknown offset for perf in BIT P %d\n", |
| bit_P.version); |
| } |
| |
| if (bios->bmp_offset) { |
| if (nv_ro08(bios, bios->bmp_offset + 6) >= 0x25) { |
| perf = nv_ro16(bios, bios->bmp_offset + 0x94); |
| if (perf) { |
| *hdr = nv_ro08(bios, perf + 0); |
| *ver = nv_ro08(bios, perf + 1); |
| } |
| } |
| } |
| |
| return perf; |
| } |
| |
| int |
| nvbios_perf_fan_parse(struct nouveau_bios *bios, |
| struct nvbios_perf_fan *fan) |
| { |
| u8 ver = 0, hdr = 0, cnt = 0, len = 0; |
| u16 perf = perf_table(bios, &ver, &hdr, &cnt, &len); |
| if (!perf) |
| return -ENODEV; |
| |
| if (ver >= 0x20 && ver < 0x40 && hdr > 6) |
| fan->pwm_divisor = nv_ro16(bios, perf + 6); |
| else |
| fan->pwm_divisor = 0; |
| |
| return 0; |
| } |
