drivers/gpu/drm/nouveau/nouveau_temp.c

   1 /*
   2  * Copyright 2010 PathScale inc.
   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 <linux/module.h>
  26
  27 #include <drm/drmP.h>
  28
  29 #include "nouveau_drv.h"
  30 #include "nouveau_pm.h"
  31
  32 static void
  33 nouveau_temp_vbios_parse(struct drm_device *dev, u8 *temp)
  34 {
  35         struct drm_nouveau_private *dev_priv = dev->dev_private;
  36         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
  37         struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
  38         struct nouveau_pm_threshold_temp *temps = &pm->threshold_temp;
  39         int i, headerlen, recordlen, entries;
  40
  41         if (!temp) {
  42                 NV_DEBUG(dev, "temperature table pointer invalid\n");
  43                 return;
  44         }
  45
  46         /* Set the default sensor's contants */
  47         sensor->offset_constant = 0;
  48         sensor->offset_mult = 0;
  49         sensor->offset_div = 1;
  50         sensor->slope_mult = 1;
  51         sensor->slope_div = 1;
  52
  53         /* Set the default temperature thresholds */
  54         temps->critical = 110;
  55         temps->down_clock = 100;
  56         temps->fan_boost = 90;
  57
  58         /* Set the default range for the pwm fan */
  59         pm->fan.min_duty = 30;
  60         pm->fan.max_duty = 100;
  61
  62         /* Set the known default values to setup the temperature sensor */
  63         if (dev_priv->card_type >= NV_40) {
  64                 switch (dev_priv->chipset) {
  65                 case 0x43:
  66                         sensor->offset_mult = 32060;
  67                         sensor->offset_div = 1000;
  68                         sensor->slope_mult = 792;
  69                         sensor->slope_div = 1000;
  70                         break;
  71
  72                 case 0x44:
  73                 case 0x47:
  74                 case 0x4a:
  75                         sensor->offset_mult = 27839;
  76                         sensor->offset_div = 1000;
  77                         sensor->slope_mult = 780;
  78                         sensor->slope_div = 1000;
  79                         break;
  80
  81                 case 0x46:
  82                         sensor->offset_mult = -24775;
  83                         sensor->offset_div = 100;
  84                         sensor->slope_mult = 467;
  85                         sensor->slope_div = 10000;
  86                         break;
  87
  88                 case 0x49:
  89                         sensor->offset_mult = -25051;
  90                         sensor->offset_div = 100;
  91                         sensor->slope_mult = 458;
  92                         sensor->slope_div = 10000;
  93                         break;
  94
  95                 case 0x4b:
  96                         sensor->offset_mult = -24088;
  97                         sensor->offset_div = 100;
  98                         sensor->slope_mult = 442;
  99                         sensor->slope_div = 10000;
 100                         break;
 101
 102                 case 0x50:
 103                         sensor->offset_mult = -22749;
 104                         sensor->offset_div = 100;
 105                         sensor->slope_mult = 431;
 106                         sensor->slope_div = 10000;
 107                         break;
 108
 109                 case 0x67:
 110                         sensor->offset_mult = -26149;
 111                         sensor->offset_div = 100;
 112                         sensor->slope_mult = 484;
 113                         sensor->slope_div = 10000;
 114                         break;
 115                 }
 116         }
 117
 118         headerlen = temp[1];
 119         recordlen = temp[2];
 120         entries = temp[3];
 121         temp = temp + headerlen;
 122
 123         /* Read the entries from the table */
 124         for (i = 0; i < entries; i++) {
 125                 s16 value = ROM16(temp[1]);
 126
 127                 switch (temp[0]) {
 128                 case 0x01:
 129                         if ((value & 0x8f) == 0)
 130                                 sensor->offset_constant = (value >> 9) & 0x7f;
 131                         break;
 132
 133                 case 0x04:
 134                         if ((value & 0xf00f) == 0xa000) /* core */
 135                                 temps->critical = (value&0x0ff0) >> 4;
 136                         break;
 137
 138                 case 0x07:
 139                         if ((value & 0xf00f) == 0xa000) /* core */
 140                                 temps->down_clock = (value&0x0ff0) >> 4;
 141                         break;
 142
 143                 case 0x08:
 144                         if ((value & 0xf00f) == 0xa000) /* core */
 145                                 temps->fan_boost = (value&0x0ff0) >> 4;
 146                         break;
 147
 148                 case 0x10:
 149                         sensor->offset_mult = value;
 150                         break;
 151
 152                 case 0x11:
 153                         sensor->offset_div = value;
 154                         break;
 155
 156                 case 0x12:
 157                         sensor->slope_mult = value;
 158                         break;
 159
 160                 case 0x13:
 161                         sensor->slope_div = value;
 162                         break;
 163                 case 0x22:
 164                         pm->fan.min_duty = value & 0xff;
 165                         pm->fan.max_duty = (value & 0xff00) >> 8;
 166                         break;
 167                 case 0x26:
 168                         pm->fan.pwm_freq = value;
 169                         break;
 170                 }
 171                 temp += recordlen;
 172         }
 173
 174         nouveau_temp_safety_checks(dev);
 175
 176         /* check the fan min/max settings */
 177         if (pm->fan.min_duty < 10)
 178                 pm->fan.min_duty = 10;
 179         if (pm->fan.max_duty > 100)
 180                 pm->fan.max_duty = 100;
 181         if (pm->fan.max_duty < pm->fan.min_duty)
 182                 pm->fan.max_duty = pm->fan.min_duty;
 183 }
 184
 185 static int
 186 nv40_sensor_setup(struct drm_device *dev)
 187 {
 188         struct drm_nouveau_private *dev_priv = dev->dev_private;
 189         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 190         struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
 191         s32 offset = sensor->offset_mult / sensor->offset_div;
 192         s32 sensor_calibration;
 193
 194         /* set up the sensors */
 195         sensor_calibration = 120 - offset - sensor->offset_constant;
 196         sensor_calibration = sensor_calibration * sensor->slope_div /
 197                                 sensor->slope_mult;
 198
 199         if (dev_priv->chipset >= 0x46)
 200                 sensor_calibration |= 0x80000000;
 201         else
 202                 sensor_calibration |= 0x10000000;
 203
 204         nv_wr32(dev, 0x0015b0, sensor_calibration);
 205
 206         /* Wait for the sensor to update */
 207         msleep(5);
 208
 209         /* read */
 210         return nv_rd32(dev, 0x0015b4) & 0x1fff;
 211 }
 212
 213 int
 214 nv40_temp_get(struct drm_device *dev)
 215 {
 216         struct drm_nouveau_private *dev_priv = dev->dev_private;
 217         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 218         struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
 219         int offset = sensor->offset_mult / sensor->offset_div;
 220         int core_temp;
 221
 222         if (dev_priv->card_type >= NV_50) {
 223                 core_temp = nv_rd32(dev, 0x20008);
 224         } else {
 225                 core_temp = nv_rd32(dev, 0x0015b4) & 0x1fff;
 226                 /* Setup the sensor if the temperature is 0 */
 227                 if (core_temp == 0)
 228                         core_temp = nv40_sensor_setup(dev);
 229         }
 230
 231         core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
 232         core_temp = core_temp + offset + sensor->offset_constant;
 233
 234         return core_temp;
 235 }
 236
 237 int
 238 nv84_temp_get(struct drm_device *dev)
 239 {
 240         return nv_rd32(dev, 0x20400);
 241 }
 242
 243 void
 244 nouveau_temp_safety_checks(struct drm_device *dev)
 245 {
 246         struct drm_nouveau_private *dev_priv = dev->dev_private;
 247         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 248         struct nouveau_pm_threshold_temp *temps = &pm->threshold_temp;
 249
 250         if (temps->critical > 120)
 251                 temps->critical = 120;
 252         else if (temps->critical < 80)
 253                 temps->critical = 80;
 254
 255         if (temps->down_clock > 110)
 256                 temps->down_clock = 110;
 257         else if (temps->down_clock < 60)
 258                 temps->down_clock = 60;
 259
 260         if (temps->fan_boost > 100)
 261                 temps->fan_boost = 100;
 262         else if (temps->fan_boost < 40)
 263                 temps->fan_boost = 40;
 264 }
 265
 266 static bool
 267 probe_monitoring_device(struct nouveau_i2c_chan *i2c,
 268                         struct i2c_board_info *info)
 269 {
 270         struct i2c_client *client;
 271
 272         request_module("%s%s", I2C_MODULE_PREFIX, info->type);
 273
 274         client = i2c_new_device(&i2c->adapter, info);
 275         if (!client)
 276                 return false;
 277
 278         if (!client->driver || client->driver->detect(client, info)) {
 279                 i2c_unregister_device(client);
 280                 return false;
 281         }
 282
 283         return true;
 284 }
 285
 286 static void
 287 nouveau_temp_probe_i2c(struct drm_device *dev)
 288 {
 289         struct i2c_board_info info[] = {
 290                 { I2C_BOARD_INFO("w83l785ts", 0x2d) },
 291                 { I2C_BOARD_INFO("w83781d", 0x2d) },
 292                 { I2C_BOARD_INFO("adt7473", 0x2e) },
 293                 { I2C_BOARD_INFO("f75375", 0x2e) },
 294                 { I2C_BOARD_INFO("lm99", 0x4c) },
 295                 { }
 296         };
 297
 298         nouveau_i2c_identify(dev, "monitoring device", info,
 299                              probe_monitoring_device, NV_I2C_DEFAULT(0));
 300 }
 301
 302 void
 303 nouveau_temp_init(struct drm_device *dev)
 304 {
 305         struct drm_nouveau_private *dev_priv = dev->dev_private;
 306         struct nvbios *bios = &dev_priv->vbios;
 307         struct bit_entry P;
 308         u8 *temp = NULL;
 309
 310         if (bios->type == NVBIOS_BIT) {
 311                 if (bit_table(dev, 'P', &P))
 312                         return;
 313
 314                 if (P.version == 1)
 315                         temp = ROMPTR(dev, P.data[12]);
 316                 else if (P.version == 2)
 317                         temp = ROMPTR(dev, P.data[16]);
 318                 else
 319                         NV_WARN(dev, "unknown temp for BIT P %d\n", P.version);
 320
 321                 nouveau_temp_vbios_parse(dev, temp);
 322         }
 323
 324         nouveau_temp_probe_i2c(dev);
 325 }
 326
 327 void
 328 nouveau_temp_fini(struct drm_device *dev)
 329 {
 330
 331 }