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
  29 static u16
  30 therm_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
  58 static u16
  59 nvbios_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
  68 int
  69 nvbios_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
 154 int
 155 nvbios_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         while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
 168                 s16 value = nv_ro16(bios, entry + 1);
 169
 170                 switch (nv_ro08(bios, entry + 0)) {
 171                 case 0x22:
 172                         fan->min_duty = value & 0xff;
 173                         fan->max_duty = (value & 0xff00) >> 8;
 174                         break;
 175                 case 0x24:
 176                         fan->nr_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                         fan->linear_min_temp = nv_ro08(bios, entry + 1);
 198                         fan->linear_max_temp = nv_ro08(bios, entry + 2);
 199                         break;
 200                 }
 201         }
 202
 203         return 0;
 204 }