LXR linux/drivers/gpu/drm/nouveau/core/subdev/bios/therm.c

   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
  25#include <subdev/bios.h>
  26#include <subdev/bios/bit.h>
  27#include <subdev/bios/therm.h>
  28
  29static u16
  30therm_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt)
  31{
  32        struct bit_entry bit_P;
  33        u16 therm = 0;
  34
  35        if (!bit_entry(bios, 'P', &bit_P)) {
  36                if (bit_P.version == 1)
  37                        therm = nv_ro16(bios, bit_P.offset + 12);
  38                else if (bit_P.version == 2)
  39                        therm = nv_ro16(bios, bit_P.offset + 16);
  40                else
  41                        nv_error(bios,
  42                                "unknown offset for thermal in BIT P %d\n",
  43                                bit_P.version);
  44        }
  45
  46        /* exit now if we haven't found the thermal table */
  47        if (!therm)
  48                return 0x0000;
  49
  50        *ver = nv_ro08(bios, therm + 0);
  51        *hdr = nv_ro08(bios, therm + 1);
  52        *len = nv_ro08(bios, therm + 2);
  53        *cnt = nv_ro08(bios, therm + 3);
  54
  55        return therm + nv_ro08(bios, therm + 1);
  56}
  57
  58static u16
  59nvbios_therm_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len)
  60{
  61        u8 hdr, cnt;
  62        u16 therm = therm_table(bios, ver, &hdr, len, &cnt);
  63        if (therm && idx < cnt)
  64                return therm + idx * *len;
  65        return 0x0000;
  66}
  67
  68int
  69nvbios_therm_sensor_parse(struct nouveau_bios *bios,
  70                          enum nvbios_therm_domain domain,
  71                          struct nvbios_therm_sensor *sensor)
  72{
  73        s8 thrs_section, sensor_section, offset;
  74        u8 ver, len, i;
  75        u16 entry;
  76
  77        /* we only support the core domain for now */
  78        if (domain != NVBIOS_THERM_DOMAIN_CORE)
  79                return -EINVAL;
  80
  81        /* Read the entries from the table */
  82        thrs_section = 0;
  83        sensor_section = -1;
  84        i = 0;
  85        while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
  86                s16 value = nv_ro16(bios, entry + 1);
  87
  88                switch (nv_ro08(bios, entry + 0)) {
  89                case 0x0:
  90                        thrs_section = value;
  91                        if (value > 0)
  92                                return 0; /* we do not try to support ambient */
  93                        break;
  94                case 0x01:
  95                        sensor_section++;
  96                        if (sensor_section == 0) {
  97                                offset = ((s8) nv_ro08(bios, entry + 2)) / 2;
  98                                sensor->offset_constant = offset;
  99                        }
 100                        break;
 101
 102                case 0x04:
 103                        if (thrs_section == 0) {
 104                                sensor->thrs_critical.temp = (value & 0xff0) >> 4;
 105                                sensor->thrs_critical.hysteresis = value & 0xf;
 106                        }
 107                        break;
 108
 109                case 0x07:
 110                        if (thrs_section == 0) {
 111                                sensor->thrs_down_clock.temp = (value & 0xff0) >> 4;
 112                                sensor->thrs_down_clock.hysteresis = value & 0xf;
 113                        }
 114                        break;
 115
 116                case 0x08:
 117                        if (thrs_section == 0) {
 118                                sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4;
 119                                sensor->thrs_fan_boost.hysteresis = value & 0xf;
 120                        }
 121                        break;
 122
 123                case 0x10:
 124                        if (sensor_section == 0)
 125                                sensor->offset_num = value;
 126                        break;
 127
 128                case 0x11:
 129                        if (sensor_section == 0)
 130                                sensor->offset_den = value;
 131                        break;
 132
 133                case 0x12:
 134                        if (sensor_section == 0)
 135                                sensor->slope_mult = value;
 136                        break;
 137
 138                case 0x13:
 139                        if (sensor_section == 0)
 140                                sensor->slope_div = value;
 141                        break;
 142                case 0x32:
 143                        if (thrs_section == 0) {
 144                                sensor->thrs_shutdown.temp = (value & 0xff0) >> 4;
 145                                sensor->thrs_shutdown.hysteresis = value & 0xf;
 146                        }
 147                        break;
 148                }
 149        }
 150
 151        return 0;
 152}
 153
 154int
 155nvbios_therm_fan_parse(struct nouveau_bios *bios,
 156                          struct nvbios_therm_fan *fan)
 157{
 158        struct nouveau_therm_trip_point *cur_trip = NULL;
 159        u8 ver, len, i;
 160        u16 entry;
 161
 162        uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0,
 163                                75, 0, 85, 0, 100, 0, 100, 0 };
 164
 165        i = 0;
 166        fan->nr_fan_trip = 0;
 167        fan->fan_mode = NVBIOS_THERM_FAN_OTHER;
 168        while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
 169                s16 value = nv_ro16(bios, entry + 1);
 170
 171                switch (nv_ro08(bios, entry + 0)) {
 172                case 0x22:
 173                        fan->min_duty = value & 0xff;
 174                        fan->max_duty = (value & 0xff00) >> 8;
 175                        break;
 176                case 0x24:
 177                        fan->nr_fan_trip++;
 178                        if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP)
 179                                fan->fan_mode = NVBIOS_THERM_FAN_TRIP;
 180                        cur_trip = &fan->trip[fan->nr_fan_trip - 1];
 181                        cur_trip->hysteresis = value & 0xf;
 182                        cur_trip->temp = (value & 0xff0) >> 4;
 183                        cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
 184                        break;
 185                case 0x25:
 186                        cur_trip = &fan->trip[fan->nr_fan_trip - 1];
 187                        cur_trip->fan_duty = value;
 188                        break;
 189                case 0x26:
 190                        if (!fan->pwm_freq)
 191                                fan->pwm_freq = value;
 192                        break;
 193                case 0x3b:
 194                        fan->bump_period = value;
 195                        break;
 196                case 0x3c:
 197                        fan->slow_down_period = value;
 198                        break;
 199                case 0x46:
 200                        if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR)
 201                                fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
 202                        fan->linear_min_temp = nv_ro08(bios, entry + 1);
 203                        fan->linear_max_temp = nv_ro08(bios, entry + 2);
 204                        break;
 205                }
 206        }
 207
 208        /* starting from fermi, fan management is always linear */
 209        if (nv_device(bios)->card_type >= NV_C0 &&
 210                fan->fan_mode == NVBIOS_THERM_FAN_OTHER) {
 211                fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
 212        }
 213
 214        return 0;
 215}
 216