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 "drmP.h"
  26
  27 #include "nouveau_drv.h"
  28 #include "nouveau_pm.h"
  29
  30 static void
  31 nouveau_temp_vbios_parse(struct drm_device *dev, u8 *temp)
  32 {
  33         struct drm_nouveau_private *dev_priv = dev->dev_private;
  34         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
  35         struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
  36         struct nouveau_pm_threshold_temp *temps = &pm->threshold_temp;
  37         int i, headerlen, recordlen, entries;
  38
  39         if (!temp) {
  40                 NV_DEBUG(dev, "temperature table pointer invalid\n");
  41                 return;
  42         }
  43
  44         /* Set the default sensor's contants */
  45         sensor->offset_constant = 0;
  46         sensor->offset_mult = 1;
  47         sensor->offset_div = 1;
  48         sensor->slope_mult = 1;
  49         sensor->slope_div = 1;
  50
  51         /* Set the default temperature thresholds */
  52         temps->critical = 110;
  53         temps->down_clock = 100;
  54         temps->fan_boost = 90;
  55
  56         /* Set the known default values to setup the temperature sensor */
  57         if (dev_priv->card_type >= NV_40) {
  58                 switch (dev_priv->chipset) {
  59                 case 0x43:
  60                         sensor->offset_mult = 32060;
  61                         sensor->offset_div = 1000;
  62                         sensor->slope_mult = 792;
  63                         sensor->slope_div = 1000;
  64                         break;
  65
  66                 case 0x44:
  67                 case 0x47:
  68                 case 0x4a:
  69                         sensor->offset_mult = 27839;
  70                         sensor->offset_div = 1000;
  71                         sensor->slope_mult = 780;
  72                         sensor->slope_div = 1000;
  73                         break;
  74
  75                 case 0x46:
  76                         sensor->offset_mult = -24775;
  77                         sensor->offset_div = 100;
  78                         sensor->slope_mult = 467;
  79                         sensor->slope_div = 10000;
  80                         break;
  81
  82                 case 0x49:
  83                         sensor->offset_mult = -25051;
  84                         sensor->offset_div = 100;
  85                         sensor->slope_mult = 458;
  86                         sensor->slope_div = 10000;
  87                         break;
  88
  89                 case 0x4b:
  90                         sensor->offset_mult = -24088;
  91                         sensor->offset_div = 100;
  92                         sensor->slope_mult = 442;
  93                         sensor->slope_div = 10000;
  94                         break;
  95
  96                 case 0x50:
  97                         sensor->offset_mult = -22749;
  98                         sensor->offset_div = 100;
  99                         sensor->slope_mult = 431;
 100                         sensor->slope_div = 10000;
 101                         break;
 102                 }
 103         }
 104
 105         headerlen = temp[1];
 106         recordlen = temp[2];
 107         entries = temp[3];
 108         temp = temp + headerlen;
 109
 110         /* Read the entries from the table */
 111         for (i = 0; i < entries; i++) {
 112                 u16 value = ROM16(temp[1]);
 113
 114                 switch (temp[0]) {
 115                 case 0x01:
 116                         if ((value & 0x8f) == 0)
 117                                 sensor->offset_constant = (value >> 9) & 0x7f;
 118                         break;
 119
 120                 case 0x04:
 121                         if ((value & 0xf00f) == 0xa000) /* core */
 122                                 temps->critical = (value&0x0ff0) >> 4;
 123                         break;
 124
 125                 case 0x07:
 126                         if ((value & 0xf00f) == 0xa000) /* core */
 127                                 temps->down_clock = (value&0x0ff0) >> 4;
 128                         break;
 129
 130                 case 0x08:
 131                         if ((value & 0xf00f) == 0xa000) /* core */
 132                                 temps->fan_boost = (value&0x0ff0) >> 4;
 133                         break;
 134
 135                 case 0x10:
 136                         sensor->offset_mult = value;
 137                         break;
 138
 139                 case 0x11:
 140                         sensor->offset_div = value;
 141                         break;
 142
 143                 case 0x12:
 144                         sensor->slope_mult = value;
 145                         break;
 146
 147                 case 0x13:
 148                         sensor->slope_div = value;
 149                         break;
 150                 }
 151                 temp += recordlen;
 152         }
 153
 154         nouveau_temp_safety_checks(dev);
 155 }
 156
 157 static int
 158 nv40_sensor_setup(struct drm_device *dev)
 159 {
 160         struct drm_nouveau_private *dev_priv = dev->dev_private;
 161         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 162         struct nouveau_pm_temp_sensor_constants *sensor = &pm->sensor_constants;
 163         u32 offset = sensor->offset_mult / sensor->offset_div;
 164         u32 sensor_calibration;
 165
 166         /* set up the sensors */
 167         sensor_calibration = 120 - offset - sensor->offset_constant;
 168         sensor_calibration = sensor_calibration * sensor->slope_div /
 169                                 sensor->slope_mult;
 170
 171         if (dev_priv->chipset >= 0x46)
 172                 sensor_calibration |= 0x80000000;
 173         else
 174                 sensor_calibration |= 0x10000000;
 175
 176         nv_wr32(dev, 0x0015b0, sensor_calibration);
 177
 178         /* Wait for the sensor to update */
 179         msleep(5);
 180
 181         /* read */
 182         return nv_rd32(dev, 0x0015b4) & 0x1fff;
 183 }
 184
 185 int
 186 nv40_temp_get(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         int offset = sensor->offset_mult / sensor->offset_div;
 192         int core_temp;
 193
 194         if (dev_priv->card_type >= NV_50) {
 195                 core_temp = nv_rd32(dev, 0x20008);
 196         } else {
 197                 core_temp = nv_rd32(dev, 0x0015b4) & 0x1fff;
 198                 /* Setup the sensor if the temperature is 0 */
 199                 if (core_temp == 0)
 200                         core_temp = nv40_sensor_setup(dev);
 201         }
 202
 203         core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
 204         core_temp = core_temp + offset + sensor->offset_constant;
 205
 206         return core_temp;
 207 }
 208
 209 int
 210 nv84_temp_get(struct drm_device *dev)
 211 {
 212         return nv_rd32(dev, 0x20400);
 213 }
 214
 215 void
 216 nouveau_temp_safety_checks(struct drm_device *dev)
 217 {
 218         struct drm_nouveau_private *dev_priv = dev->dev_private;
 219         struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
 220         struct nouveau_pm_threshold_temp *temps = &pm->threshold_temp;
 221
 222         if (temps->critical > 120)
 223                 temps->critical = 120;
 224         else if (temps->critical < 80)
 225                 temps->critical = 80;
 226
 227         if (temps->down_clock > 110)
 228                 temps->down_clock = 110;
 229         else if (temps->down_clock < 60)
 230                 temps->down_clock = 60;
 231
 232         if (temps->fan_boost > 100)
 233                 temps->fan_boost = 100;
 234         else if (temps->fan_boost < 40)
 235                 temps->fan_boost = 40;
 236 }
 237
 238 static bool
 239 probe_monitoring_device(struct nouveau_i2c_chan *i2c,
 240                         struct i2c_board_info *info)
 241 {
 242         struct i2c_client *client;
 243
 244         request_module("%s%s", I2C_MODULE_PREFIX, info->type);
 245
 246         client = i2c_new_device(&i2c->adapter, info);
 247         if (!client)
 248                 return false;
 249
 250         if (!client->driver || client->driver->detect(client, info)) {
 251                 i2c_unregister_device(client);
 252                 return false;
 253         }
 254
 255         return true;
 256 }
 257
 258 static void
 259 nouveau_temp_probe_i2c(struct drm_device *dev)
 260 {
 261         struct drm_nouveau_private *dev_priv = dev->dev_private;
 262         struct dcb_table *dcb = &dev_priv->vbios.dcb;
 263         struct i2c_board_info info[] = {
 264                 { I2C_BOARD_INFO("w83l785ts", 0x2d) },
 265                 { I2C_BOARD_INFO("w83781d", 0x2d) },
 266                 { I2C_BOARD_INFO("adt7473", 0x2e) },
 267                 { I2C_BOARD_INFO("f75375", 0x2e) },
 268                 { I2C_BOARD_INFO("lm99", 0x4c) },
 269                 { }
 270         };
 271         int idx = (dcb->version >= 0x40 ?
 272                    dcb->i2c_default_indices & 0xf : 2);
 273
 274         nouveau_i2c_identify(dev, "monitoring device", info,
 275                              probe_monitoring_device, idx);
 276 }
 277
 278 void
 279 nouveau_temp_init(struct drm_device *dev)
 280 {
 281         struct drm_nouveau_private *dev_priv = dev->dev_private;
 282         struct nvbios *bios = &dev_priv->vbios;
 283         struct bit_entry P;
 284         u8 *temp = NULL;
 285
 286         if (bios->type == NVBIOS_BIT) {
 287                 if (bit_table(dev, 'P', &P))
 288                         return;
 289
 290                 if (P.version == 1)
 291                         temp = ROMPTR(bios, P.data[12]);
 292                 else if (P.version == 2)
 293                         temp = ROMPTR(bios, P.data[16]);
 294                 else
 295                         NV_WARN(dev, "unknown temp for BIT P %d\n", P.version);
 296
 297                 nouveau_temp_vbios_parse(dev, temp);
 298         }
 299
 300         nouveau_temp_probe_i2c(dev);
 301 }
 302
 303 void
 304 nouveau_temp_fini(struct drm_device *dev)
 305 {
 306
 307 }