kernel/drivers/gpu/drm/nouveau/nvkm/subdev/therm/nv40.c

   1 /*
   2  * Copyright 2012 Red Hat 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: Ben Skeggs
  23  *          Martin Peres
  24  */
  25 #include "priv.h"
  26
  27 #include <core/device.h>
  28
  29 struct nv40_therm_priv {
  30         struct nvkm_therm_priv base;
  31 };
  32
  33 enum nv40_sensor_style { INVALID_STYLE = -1, OLD_STYLE = 0, NEW_STYLE = 1 };
  34
  35 static enum nv40_sensor_style
  36 nv40_sensor_style(struct nvkm_therm *therm)
  37 {
  38         struct nvkm_device *device = nv_device(therm);
  39
  40         switch (device->chipset) {
  41         case 0x43:
  42         case 0x44:
  43         case 0x4a:
  44         case 0x47:
  45                 return OLD_STYLE;
  46
  47         case 0x46:
  48         case 0x49:
  49         case 0x4b:
  50         case 0x4e:
  51         case 0x4c:
  52         case 0x67:
  53         case 0x68:
  54         case 0x63:
  55                 return NEW_STYLE;
  56         default:
  57                 return INVALID_STYLE;
  58         }
  59 }
  60
  61 static int
  62 nv40_sensor_setup(struct nvkm_therm *therm)
  63 {
  64         enum nv40_sensor_style style = nv40_sensor_style(therm);
  65
  66         /* enable ADC readout and disable the ALARM threshold */
  67         if (style == NEW_STYLE) {
  68                 nv_mask(therm, 0x15b8, 0x80000000, 0);
  69                 nv_wr32(therm, 0x15b0, 0x80003fff);
  70                 mdelay(20); /* wait for the temperature to stabilize */
  71                 return nv_rd32(therm, 0x15b4) & 0x3fff;
  72         } else if (style == OLD_STYLE) {
  73                 nv_wr32(therm, 0x15b0, 0xff);
  74                 mdelay(20); /* wait for the temperature to stabilize */
  75                 return nv_rd32(therm, 0x15b4) & 0xff;
  76         } else
  77                 return -ENODEV;
  78 }
  79
  80 static int
  81 nv40_temp_get(struct nvkm_therm *therm)
  82 {
  83         struct nvkm_therm_priv *priv = (void *)therm;
  84         struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
  85         enum nv40_sensor_style style = nv40_sensor_style(therm);
  86         int core_temp;
  87
  88         if (style == NEW_STYLE) {
  89                 nv_wr32(therm, 0x15b0, 0x80003fff);
  90                 core_temp = nv_rd32(therm, 0x15b4) & 0x3fff;
  91         } else if (style == OLD_STYLE) {
  92                 nv_wr32(therm, 0x15b0, 0xff);
  93                 core_temp = nv_rd32(therm, 0x15b4) & 0xff;
  94         } else
  95                 return -ENODEV;
  96
  97         /* if the slope or the offset is unset, do no use the sensor */
  98         if (!sensor->slope_div || !sensor->slope_mult ||
  99             !sensor->offset_num || !sensor->offset_den)
 100             return -ENODEV;
 101
 102         core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
 103         core_temp = core_temp + sensor->offset_num / sensor->offset_den;
 104         core_temp = core_temp + sensor->offset_constant - 8;
 105
 106         /* reserve negative temperatures for errors */
 107         if (core_temp < 0)
 108                 core_temp = 0;
 109
 110         return core_temp;
 111 }
 112
 113 static int
 114 nv40_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
 115 {
 116         u32 mask = enable ? 0x80000000 : 0x0000000;
 117         if      (line == 2) nv_mask(therm, 0x0010f0, 0x80000000, mask);
 118         else if (line == 9) nv_mask(therm, 0x0015f4, 0x80000000, mask);
 119         else {
 120                 nv_error(therm, "unknown pwm ctrl for gpio %d\n", line);
 121                 return -ENODEV;
 122         }
 123         return 0;
 124 }
 125
 126 static int
 127 nv40_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
 128 {
 129         if (line == 2) {
 130                 u32 reg = nv_rd32(therm, 0x0010f0);
 131                 if (reg & 0x80000000) {
 132                         *duty = (reg & 0x7fff0000) >> 16;
 133                         *divs = (reg & 0x00007fff);
 134                         return 0;
 135                 }
 136         } else
 137         if (line == 9) {
 138                 u32 reg = nv_rd32(therm, 0x0015f4);
 139                 if (reg & 0x80000000) {
 140                         *divs = nv_rd32(therm, 0x0015f8);
 141                         *duty = (reg & 0x7fffffff);
 142                         return 0;
 143                 }
 144         } else {
 145                 nv_error(therm, "unknown pwm ctrl for gpio %d\n", line);
 146                 return -ENODEV;
 147         }
 148
 149         return -EINVAL;
 150 }
 151
 152 static int
 153 nv40_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
 154 {
 155         if (line == 2) {
 156                 nv_mask(therm, 0x0010f0, 0x7fff7fff, (duty << 16) | divs);
 157         } else
 158         if (line == 9) {
 159                 nv_wr32(therm, 0x0015f8, divs);
 160                 nv_mask(therm, 0x0015f4, 0x7fffffff, duty);
 161         } else {
 162                 nv_error(therm, "unknown pwm ctrl for gpio %d\n", line);
 163                 return -ENODEV;
 164         }
 165
 166         return 0;
 167 }
 168
 169 void
 170 nv40_therm_intr(struct nvkm_subdev *subdev)
 171 {
 172         struct nvkm_therm *therm = nvkm_therm(subdev);
 173         uint32_t stat = nv_rd32(therm, 0x1100);
 174
 175         /* traitement */
 176
 177         /* ack all IRQs */
 178         nv_wr32(therm, 0x1100, 0x70000);
 179
 180         nv_error(therm, "THERM received an IRQ: stat = %x\n", stat);
 181 }
 182
 183 static int
 184 nv40_therm_ctor(struct nvkm_object *parent,
 185                 struct nvkm_object *engine,
 186                 struct nvkm_oclass *oclass, void *data, u32 size,
 187                 struct nvkm_object **pobject)
 188 {
 189         struct nv40_therm_priv *priv;
 190         int ret;
 191
 192         ret = nvkm_therm_create(parent, engine, oclass, &priv);
 193         *pobject = nv_object(priv);
 194         if (ret)
 195                 return ret;
 196
 197         priv->base.base.pwm_ctrl = nv40_fan_pwm_ctrl;
 198         priv->base.base.pwm_get = nv40_fan_pwm_get;
 199         priv->base.base.pwm_set = nv40_fan_pwm_set;
 200         priv->base.base.temp_get = nv40_temp_get;
 201         priv->base.sensor.program_alarms = nvkm_therm_program_alarms_polling;
 202         nv_subdev(priv)->intr = nv40_therm_intr;
 203         return nvkm_therm_preinit(&priv->base.base);
 204 }
 205
 206 static int
 207 nv40_therm_init(struct nvkm_object *object)
 208 {
 209         struct nvkm_therm *therm = (void *)object;
 210
 211         nv40_sensor_setup(therm);
 212
 213         return _nvkm_therm_init(object);
 214 }
 215
 216 struct nvkm_oclass
 217 nv40_therm_oclass = {
 218         .handle = NV_SUBDEV(THERM, 0x40),
 219         .ofuncs = &(struct nvkm_ofuncs) {
 220                 .ctor = nv40_therm_ctor,
 221                 .dtor = _nvkm_therm_dtor,
 222                 .init = nv40_therm_init,
 223                 .fini = _nvkm_therm_fini,
 224         },
 225 };