/* * 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; }