| /* |
| * Copyright 2014 Martin Peres |
| * |
| * 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/fan.h> |
| |
| static u32 |
| nvbios_fan_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
| { |
| struct bit_entry bit_P; |
| u32 fan = 0; |
| |
| if (!bit_entry(bios, 'P', &bit_P)) { |
| if (bit_P.version == 2 && bit_P.length >= 0x5c) |
| fan = nvbios_rd32(bios, bit_P.offset + 0x58); |
| |
| if (fan) { |
| *ver = nvbios_rd08(bios, fan + 0); |
| switch (*ver) { |
| case 0x10: |
| *hdr = nvbios_rd08(bios, fan + 1); |
| *len = nvbios_rd08(bios, fan + 2); |
| *cnt = nvbios_rd08(bios, fan + 3); |
| return fan; |
| default: |
| break; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static u32 |
| nvbios_fan_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, |
| u8 *cnt, u8 *len) |
| { |
| u32 data = nvbios_fan_table(bios, ver, hdr, cnt, len); |
| if (data && idx < *cnt) |
| return data + *hdr + (idx * (*len)); |
| return 0; |
| } |
| |
| u32 |
| nvbios_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan) |
| { |
| u8 ver, hdr, cnt, len; |
| |
| u32 data = nvbios_fan_entry(bios, 0, &ver, &hdr, &cnt, &len); |
| if (data) { |
| u8 type = nvbios_rd08(bios, data + 0x00); |
| switch (type) { |
| case 0: |
| fan->type = NVBIOS_THERM_FAN_TOGGLE; |
| break; |
| case 1: |
| case 2: |
| /* TODO: Understand the difference between the two! */ |
| fan->type = NVBIOS_THERM_FAN_PWM; |
| break; |
| default: |
| fan->type = NVBIOS_THERM_FAN_UNK; |
| } |
| |
| fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; |
| fan->min_duty = nvbios_rd08(bios, data + 0x02); |
| fan->max_duty = nvbios_rd08(bios, data + 0x03); |
| |
| fan->pwm_freq = nvbios_rd32(bios, data + 0x0b) & 0xffffff; |
| } |
| |
| return data; |
| } |
