/*
* 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;
}
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