| 1 | /* $NetBSD: nouveau_subdev_bios_therm.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2012 Nouveau Community |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Martin Peres |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bios_therm.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $" ); |
| 29 | |
| 30 | #include <subdev/bios.h> |
| 31 | #include <subdev/bios/bit.h> |
| 32 | #include <subdev/bios/therm.h> |
| 33 | |
| 34 | static u16 |
| 35 | therm_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt) |
| 36 | { |
| 37 | struct bit_entry bit_P; |
| 38 | u16 therm = 0; |
| 39 | |
| 40 | if (!bit_entry(bios, 'P', &bit_P)) { |
| 41 | if (bit_P.version == 1) |
| 42 | therm = nv_ro16(bios, bit_P.offset + 12); |
| 43 | else if (bit_P.version == 2) |
| 44 | therm = nv_ro16(bios, bit_P.offset + 16); |
| 45 | else |
| 46 | nv_error(bios, |
| 47 | "unknown offset for thermal in BIT P %d\n" , |
| 48 | bit_P.version); |
| 49 | } |
| 50 | |
| 51 | /* exit now if we haven't found the thermal table */ |
| 52 | if (!therm) |
| 53 | return 0x0000; |
| 54 | |
| 55 | *ver = nv_ro08(bios, therm + 0); |
| 56 | *hdr = nv_ro08(bios, therm + 1); |
| 57 | *len = nv_ro08(bios, therm + 2); |
| 58 | *cnt = nv_ro08(bios, therm + 3); |
| 59 | |
| 60 | return therm + nv_ro08(bios, therm + 1); |
| 61 | } |
| 62 | |
| 63 | static u16 |
| 64 | nvbios_therm_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len) |
| 65 | { |
| 66 | u8 hdr, cnt; |
| 67 | u16 therm = therm_table(bios, ver, &hdr, len, &cnt); |
| 68 | if (therm && idx < cnt) |
| 69 | return therm + idx * *len; |
| 70 | return 0x0000; |
| 71 | } |
| 72 | |
| 73 | int |
| 74 | nvbios_therm_sensor_parse(struct nouveau_bios *bios, |
| 75 | enum nvbios_therm_domain domain, |
| 76 | struct nvbios_therm_sensor *sensor) |
| 77 | { |
| 78 | s8 thrs_section, sensor_section, offset; |
| 79 | u8 ver, len, i; |
| 80 | u16 entry; |
| 81 | |
| 82 | /* we only support the core domain for now */ |
| 83 | if (domain != NVBIOS_THERM_DOMAIN_CORE) |
| 84 | return -EINVAL; |
| 85 | |
| 86 | /* Read the entries from the table */ |
| 87 | thrs_section = 0; |
| 88 | sensor_section = -1; |
| 89 | i = 0; |
| 90 | while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) { |
| 91 | s16 value = nv_ro16(bios, entry + 1); |
| 92 | |
| 93 | switch (nv_ro08(bios, entry + 0)) { |
| 94 | case 0x0: |
| 95 | thrs_section = value; |
| 96 | if (value > 0) |
| 97 | return 0; /* we do not try to support ambient */ |
| 98 | break; |
| 99 | case 0x01: |
| 100 | sensor_section++; |
| 101 | if (sensor_section == 0) { |
| 102 | offset = ((s8) nv_ro08(bios, entry + 2)) / 2; |
| 103 | sensor->offset_constant = offset; |
| 104 | } |
| 105 | break; |
| 106 | |
| 107 | case 0x04: |
| 108 | if (thrs_section == 0) { |
| 109 | sensor->thrs_critical.temp = (value & 0xff0) >> 4; |
| 110 | sensor->thrs_critical.hysteresis = value & 0xf; |
| 111 | } |
| 112 | break; |
| 113 | |
| 114 | case 0x07: |
| 115 | if (thrs_section == 0) { |
| 116 | sensor->thrs_down_clock.temp = (value & 0xff0) >> 4; |
| 117 | sensor->thrs_down_clock.hysteresis = value & 0xf; |
| 118 | } |
| 119 | break; |
| 120 | |
| 121 | case 0x08: |
| 122 | if (thrs_section == 0) { |
| 123 | sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4; |
| 124 | sensor->thrs_fan_boost.hysteresis = value & 0xf; |
| 125 | } |
| 126 | break; |
| 127 | |
| 128 | case 0x10: |
| 129 | if (sensor_section == 0) |
| 130 | sensor->offset_num = value; |
| 131 | break; |
| 132 | |
| 133 | case 0x11: |
| 134 | if (sensor_section == 0) |
| 135 | sensor->offset_den = value; |
| 136 | break; |
| 137 | |
| 138 | case 0x12: |
| 139 | if (sensor_section == 0) |
| 140 | sensor->slope_mult = value; |
| 141 | break; |
| 142 | |
| 143 | case 0x13: |
| 144 | if (sensor_section == 0) |
| 145 | sensor->slope_div = value; |
| 146 | break; |
| 147 | case 0x32: |
| 148 | if (thrs_section == 0) { |
| 149 | sensor->thrs_shutdown.temp = (value & 0xff0) >> 4; |
| 150 | sensor->thrs_shutdown.hysteresis = value & 0xf; |
| 151 | } |
| 152 | break; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | int |
| 160 | nvbios_therm_fan_parse(struct nouveau_bios *bios, |
| 161 | struct nvbios_therm_fan *fan) |
| 162 | { |
| 163 | struct nouveau_therm_trip_point *cur_trip = NULL; |
| 164 | u8 ver, len, i; |
| 165 | u16 entry; |
| 166 | |
| 167 | uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0, |
| 168 | 75, 0, 85, 0, 100, 0, 100, 0 }; |
| 169 | |
| 170 | i = 0; |
| 171 | fan->nr_fan_trip = 0; |
| 172 | fan->fan_mode = NVBIOS_THERM_FAN_OTHER; |
| 173 | while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) { |
| 174 | s16 value = nv_ro16(bios, entry + 1); |
| 175 | |
| 176 | switch (nv_ro08(bios, entry + 0)) { |
| 177 | case 0x22: |
| 178 | fan->min_duty = value & 0xff; |
| 179 | fan->max_duty = (value & 0xff00) >> 8; |
| 180 | break; |
| 181 | case 0x24: |
| 182 | fan->nr_fan_trip++; |
| 183 | if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP) |
| 184 | fan->fan_mode = NVBIOS_THERM_FAN_TRIP; |
| 185 | cur_trip = &fan->trip[fan->nr_fan_trip - 1]; |
| 186 | cur_trip->hysteresis = value & 0xf; |
| 187 | cur_trip->temp = (value & 0xff0) >> 4; |
| 188 | cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12]; |
| 189 | break; |
| 190 | case 0x25: |
| 191 | cur_trip = &fan->trip[fan->nr_fan_trip - 1]; |
| 192 | cur_trip->fan_duty = value; |
| 193 | break; |
| 194 | case 0x26: |
| 195 | if (!fan->pwm_freq) |
| 196 | fan->pwm_freq = value; |
| 197 | break; |
| 198 | case 0x3b: |
| 199 | fan->bump_period = value; |
| 200 | break; |
| 201 | case 0x3c: |
| 202 | fan->slow_down_period = value; |
| 203 | break; |
| 204 | case 0x46: |
| 205 | if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR) |
| 206 | fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; |
| 207 | fan->linear_min_temp = nv_ro08(bios, entry + 1); |
| 208 | fan->linear_max_temp = nv_ro08(bios, entry + 2); |
| 209 | break; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | /* starting from fermi, fan management is always linear */ |
| 214 | if (nv_device(bios)->card_type >= NV_C0 && |
| 215 | fan->fan_mode == NVBIOS_THERM_FAN_OTHER) { |
| 216 | fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; |
| 217 | } |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |