/* * 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 nouveau_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 = nv_ro16(bios, bit_P.offset + 12); else if (bit_P.version == 2) therm = nv_ro16(bios, bit_P.offset + 16); else nv_error(bios, "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 = nv_ro08(bios, therm + 0); *hdr = nv_ro08(bios, therm + 1); *len = nv_ro08(bios, therm + 2); *cnt = nv_ro08(bios, therm + 3); return therm + nv_ro08(bios, therm + 1); } static u16 nvbios_therm_entry(struct nouveau_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 nouveau_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 = nv_ro16(bios, entry + 1); switch (nv_ro08(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) nv_ro08(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 nouveau_bios *bios, struct nvbios_therm_fan *fan) { struct nouveau_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; while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) { s16 value = nv_ro16(bios, entry + 1); switch (nv_ro08(bios, entry + 0)) { case 0x22: fan->min_duty = value & 0xff; fan->max_duty = (value & 0xff00) >> 8; break; case 0x24: fan->nr_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: fan->linear_min_temp = nv_ro08(bios, entry + 1); fan->linear_max_temp = nv_ro08(bios, entry + 2); break; } } return 0; }