95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
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/*
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* Copyright 2014 Martin Peres
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Martin Peres
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*/
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#include <subdev/bios.h>
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#include <subdev/bios/bit.h>
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#include <subdev/bios/fan.h>
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static u32
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nvbios_fan_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
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{
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struct bit_entry bit_P;
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u32 fan = 0;
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if (!bit_entry(bios, 'P', &bit_P)) {
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if (bit_P.version == 2 && bit_P.length >= 0x5c)
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fan = nvbios_rd32(bios, bit_P.offset + 0x58);
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if (fan) {
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*ver = nvbios_rd08(bios, fan + 0);
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switch (*ver) {
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case 0x10:
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*hdr = nvbios_rd08(bios, fan + 1);
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*len = nvbios_rd08(bios, fan + 2);
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*cnt = nvbios_rd08(bios, fan + 3);
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return fan;
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default:
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break;
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}
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}
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}
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return 0;
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}
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static u32
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nvbios_fan_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
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u8 *cnt, u8 *len)
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{
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u32 data = nvbios_fan_table(bios, ver, hdr, cnt, len);
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if (data && idx < *cnt)
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return data + *hdr + (idx * (*len));
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return 0;
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}
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u32
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nvbios_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
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{
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u8 ver, hdr, cnt, len;
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u32 data = nvbios_fan_entry(bios, 0, &ver, &hdr, &cnt, &len);
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if (data) {
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u8 type = nvbios_rd08(bios, data + 0x00);
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switch (type) {
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case 0:
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fan->type = NVBIOS_THERM_FAN_TOGGLE;
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break;
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case 1:
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case 2:
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/* TODO: Understand the difference between the two! */
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fan->type = NVBIOS_THERM_FAN_PWM;
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break;
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default:
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fan->type = NVBIOS_THERM_FAN_UNK;
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}
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fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
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fan->min_duty = nvbios_rd08(bios, data + 0x02);
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fan->max_duty = nvbios_rd08(bios, data + 0x03);
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fan->pwm_freq = nvbios_rd32(bios, data + 0x0b) & 0xffffff;
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}
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return data;
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}
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