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/*
* 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/therm.h>
static u16
therm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt)
{
struct bit_entry bit_P;
u16 therm = 0;
if (!bit_entry(bios, 'P', &bit_P)) {
if (bit_P.version == 1)
therm = nvbios_rd16(bios, bit_P.offset + 12);
else if (bit_P.version == 2)
therm = nvbios_rd16(bios, bit_P.offset + 16);
else
nvkm_error(&bios->subdev,
"unknown offset for thermal in BIT P %d\n",
bit_P.version);
}
/* exit now if we haven't found the thermal table */
if (!therm)
return 0x0000;
*ver = nvbios_rd08(bios, therm + 0);
*hdr = nvbios_rd08(bios, therm + 1);
*len = nvbios_rd08(bios, therm + 2);
*cnt = nvbios_rd08(bios, therm + 3);
return therm + nvbios_rd08(bios, therm + 1);
}
static u16
nvbios_therm_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
{
u8 hdr, cnt;
u16 therm = therm_table(bios, ver, &hdr, len, &cnt);
if (therm && idx < cnt)
return therm + idx * *len;
return 0x0000;
}
int
nvbios_therm_sensor_parse(struct nvkm_bios *bios,
enum nvbios_therm_domain domain,
struct nvbios_therm_sensor *sensor)
{
s8 thrs_section, sensor_section, offset;
u8 ver, len, i;
u16 entry;
/* we only support the core domain for now */
if (domain != NVBIOS_THERM_DOMAIN_CORE)
return -EINVAL;
/* Read the entries from the table */
thrs_section = 0;
sensor_section = -1;
i = 0;
while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
s16 value = nvbios_rd16(bios, entry + 1);
switch (nvbios_rd08(bios, entry + 0)) {
case 0x0:
thrs_section = value;
if (value > 0)
return 0; /* we do not try to support ambient */
break;
case 0x01:
sensor_section++;
if (sensor_section == 0) {
offset = ((s8) nvbios_rd08(bios, entry + 2)) / 2;
sensor->offset_constant = offset;
}
break;
case 0x04:
if (thrs_section == 0) {
sensor->thrs_critical.temp = (value & 0xff0) >> 4;
sensor->thrs_critical.hysteresis = value & 0xf;
}
break;
case 0x07:
if (thrs_section == 0) {
sensor->thrs_down_clock.temp = (value & 0xff0) >> 4;
sensor->thrs_down_clock.hysteresis = value & 0xf;
}
break;
case 0x08:
if (thrs_section == 0) {
sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4;
sensor->thrs_fan_boost.hysteresis = value & 0xf;
}
break;
case 0x10:
if (sensor_section == 0)
sensor->offset_num = value;
break;
case 0x11:
if (sensor_section == 0)
sensor->offset_den = value;
break;
case 0x12:
if (sensor_section == 0)
sensor->slope_mult = value;
break;
case 0x13:
if (sensor_section == 0)
sensor->slope_div = value;
break;
case 0x32:
if (thrs_section == 0) {
sensor->thrs_shutdown.temp = (value & 0xff0) >> 4;
sensor->thrs_shutdown.hysteresis = value & 0xf;
}
break;
}
}
return 0;
}
int
nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
{
struct nvbios_therm_trip_point *cur_trip = NULL;
u8 ver, len, i;
u16 entry;
uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0,
75, 0, 85, 0, 100, 0, 100, 0 };
i = 0;
fan->nr_fan_trip = 0;
fan->fan_mode = NVBIOS_THERM_FAN_OTHER;
while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
s16 value = nvbios_rd16(bios, entry + 1);
switch (nvbios_rd08(bios, entry + 0)) {
case 0x22:
fan->min_duty = value & 0xff;
fan->max_duty = (value & 0xff00) >> 8;
break;
case 0x24:
fan->nr_fan_trip++;
if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP)
fan->fan_mode = NVBIOS_THERM_FAN_TRIP;
cur_trip = &fan->trip[fan->nr_fan_trip - 1];
cur_trip->hysteresis = value & 0xf;
cur_trip->temp = (value & 0xff0) >> 4;
cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
break;
case 0x25:
cur_trip = &fan->trip[fan->nr_fan_trip - 1];
cur_trip->fan_duty = value;
break;
case 0x26:
if (!fan->pwm_freq)
fan->pwm_freq = value;
break;
case 0x3b:
fan->bump_period = value;
break;
case 0x3c:
fan->slow_down_period = value;
break;
case 0x46:
if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR)
fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
fan->linear_min_temp = nvbios_rd08(bios, entry + 1);
fan->linear_max_temp = nvbios_rd08(bios, entry + 2);
break;
}
}
/* starting from fermi, fan management is always linear */
if (bios->subdev.device->card_type >= NV_C0 &&
fan->fan_mode == NVBIOS_THERM_FAN_OTHER) {
fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
}
return 0;
}
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