1 /* 2 * Copyright 2012 Nouveau Community 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Martin Peres 23 */ 24 #include <subdev/bios.h> 25 #include <subdev/bios/bit.h> 26 #include <subdev/bios/therm.h> 27 28 static u16 29 therm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt) 30 { 31 struct bit_entry bit_P; 32 u16 therm = 0; 33 34 if (!bit_entry(bios, 'P', &bit_P)) { 35 if (bit_P.version == 1) 36 therm = nvbios_rd16(bios, bit_P.offset + 12); 37 else if (bit_P.version == 2) 38 therm = nvbios_rd16(bios, bit_P.offset + 16); 39 else 40 nvkm_error(&bios->subdev, 41 "unknown offset for thermal in BIT P %d\n", 42 bit_P.version); 43 } 44 45 /* exit now if we haven't found the thermal table */ 46 if (!therm) 47 return 0x0000; 48 49 *ver = nvbios_rd08(bios, therm + 0); 50 *hdr = nvbios_rd08(bios, therm + 1); 51 *len = nvbios_rd08(bios, therm + 2); 52 *cnt = nvbios_rd08(bios, therm + 3); 53 return therm + nvbios_rd08(bios, therm + 1); 54 } 55 56 static u16 57 nvbios_therm_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) 58 { 59 u8 hdr, cnt; 60 u16 therm = therm_table(bios, ver, &hdr, len, &cnt); 61 if (therm && idx < cnt) 62 return therm + idx * *len; 63 return 0x0000; 64 } 65 66 int 67 nvbios_therm_sensor_parse(struct nvkm_bios *bios, 68 enum nvbios_therm_domain domain, 69 struct nvbios_therm_sensor *sensor) 70 { 71 s8 thrs_section, sensor_section, offset; 72 u8 ver, len, i; 73 u16 entry; 74 75 /* we only support the core domain for now */ 76 if (domain != NVBIOS_THERM_DOMAIN_CORE) 77 return -EINVAL; 78 79 /* Read the entries from the table */ 80 thrs_section = 0; 81 sensor_section = -1; 82 i = 0; 83 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) { 84 s16 value = nvbios_rd16(bios, entry + 1); 85 86 switch (nvbios_rd08(bios, entry + 0)) { 87 case 0x0: 88 thrs_section = value; 89 if (value > 0) 90 return 0; /* we do not try to support ambient */ 91 break; 92 case 0x01: 93 sensor_section++; 94 if (sensor_section == 0) { 95 offset = ((s8) nvbios_rd08(bios, entry + 2)) / 2; 96 sensor->offset_constant = offset; 97 } 98 break; 99 100 case 0x04: 101 if (thrs_section == 0) { 102 sensor->thrs_critical.temp = (value & 0xff0) >> 4; 103 sensor->thrs_critical.hysteresis = value & 0xf; 104 } 105 break; 106 107 case 0x07: 108 if (thrs_section == 0) { 109 sensor->thrs_down_clock.temp = (value & 0xff0) >> 4; 110 sensor->thrs_down_clock.hysteresis = value & 0xf; 111 } 112 break; 113 114 case 0x08: 115 if (thrs_section == 0) { 116 sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4; 117 sensor->thrs_fan_boost.hysteresis = value & 0xf; 118 } 119 break; 120 121 case 0x10: 122 if (sensor_section == 0) 123 sensor->offset_num = value; 124 break; 125 126 case 0x11: 127 if (sensor_section == 0) 128 sensor->offset_den = value; 129 break; 130 131 case 0x12: 132 if (sensor_section == 0) 133 sensor->slope_mult = value; 134 break; 135 136 case 0x13: 137 if (sensor_section == 0) 138 sensor->slope_div = value; 139 break; 140 case 0x32: 141 if (thrs_section == 0) { 142 sensor->thrs_shutdown.temp = (value & 0xff0) >> 4; 143 sensor->thrs_shutdown.hysteresis = value & 0xf; 144 } 145 break; 146 } 147 } 148 149 return 0; 150 } 151 152 int 153 nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan) 154 { 155 struct nvbios_therm_trip_point *cur_trip = NULL; 156 u8 ver, len, i; 157 u16 entry; 158 159 uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0, 160 75, 0, 85, 0, 100, 0, 100, 0 }; 161 162 i = 0; 163 fan->nr_fan_trip = 0; 164 fan->fan_mode = NVBIOS_THERM_FAN_OTHER; 165 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) { 166 s16 value = nvbios_rd16(bios, entry + 1); 167 168 switch (nvbios_rd08(bios, entry + 0)) { 169 case 0x22: 170 fan->min_duty = value & 0xff; 171 fan->max_duty = (value & 0xff00) >> 8; 172 break; 173 case 0x24: 174 fan->nr_fan_trip++; 175 if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP) 176 fan->fan_mode = NVBIOS_THERM_FAN_TRIP; 177 cur_trip = &fan->trip[fan->nr_fan_trip - 1]; 178 cur_trip->hysteresis = value & 0xf; 179 cur_trip->temp = (value & 0xff0) >> 4; 180 cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12]; 181 break; 182 case 0x25: 183 cur_trip = &fan->trip[fan->nr_fan_trip - 1]; 184 cur_trip->fan_duty = value; 185 break; 186 case 0x26: 187 if (!fan->pwm_freq) 188 fan->pwm_freq = value; 189 break; 190 case 0x3b: 191 fan->bump_period = value; 192 break; 193 case 0x3c: 194 fan->slow_down_period = value; 195 break; 196 case 0x46: 197 if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR) 198 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; 199 fan->linear_min_temp = nvbios_rd08(bios, entry + 1); 200 fan->linear_max_temp = nvbios_rd08(bios, entry + 2); 201 break; 202 } 203 } 204 205 /* starting from fermi, fan management is always linear */ 206 if (bios->subdev.device->card_type >= NV_C0 && 207 fan->fan_mode == NVBIOS_THERM_FAN_OTHER) { 208 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; 209 } 210 211 return 0; 212 } 213