kernel/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gt215.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  */
  24 #include "priv.h"
  25
  26 #include <core/device.h>
  27 #include <subdev/gpio.h>
  28
  29 struct gt215_therm_priv {
  30         struct nvkm_therm_priv base;
  31 };
  32
  33 int
  34 gt215_therm_fan_sense(struct nvkm_therm *therm)
  35 {
  36         u32 tach = nv_rd32(therm, 0x00e728) & 0x0000ffff;
  37         u32 ctrl = nv_rd32(therm, 0x00e720);
  38         if (ctrl & 0x00000001)
  39                 return tach * 60 / 2;
  40         return -ENODEV;
  41 }
  42
  43 static int
  44 gt215_therm_init(struct nvkm_object *object)
  45 {
  46         struct gt215_therm_priv *priv = (void *)object;
  47         struct dcb_gpio_func *tach = &priv->base.fan->tach;
  48         int ret;
  49
  50         ret = nvkm_therm_init(&priv->base.base);
  51         if (ret)
  52                 return ret;
  53
  54         g84_sensor_setup(&priv->base.base);
  55
  56         /* enable fan tach, count revolutions per-second */
  57         nv_mask(priv, 0x00e720, 0x00000003, 0x00000002);
  58         if (tach->func != DCB_GPIO_UNUSED) {
  59                 nv_wr32(priv, 0x00e724, nv_device(priv)->crystal * 1000);
  60                 nv_mask(priv, 0x00e720, 0x001f0000, tach->line << 16);
  61                 nv_mask(priv, 0x00e720, 0x00000001, 0x00000001);
  62         }
  63         nv_mask(priv, 0x00e720, 0x00000002, 0x00000000);
  64
  65         return 0;
  66 }
  67
  68 static int
  69 gt215_therm_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
  70                  struct nvkm_oclass *oclass, void *data, u32 size,
  71                  struct nvkm_object **pobject)
  72 {
  73         struct gt215_therm_priv *priv;
  74         int ret;
  75
  76         ret = nvkm_therm_create(parent, engine, oclass, &priv);
  77         *pobject = nv_object(priv);
  78         if (ret)
  79                 return ret;
  80
  81         priv->base.base.pwm_ctrl = nv50_fan_pwm_ctrl;
  82         priv->base.base.pwm_get = nv50_fan_pwm_get;
  83         priv->base.base.pwm_set = nv50_fan_pwm_set;
  84         priv->base.base.pwm_clock = nv50_fan_pwm_clock;
  85         priv->base.base.temp_get = g84_temp_get;
  86         priv->base.base.fan_sense = gt215_therm_fan_sense;
  87         priv->base.sensor.program_alarms = nvkm_therm_program_alarms_polling;
  88         return nvkm_therm_preinit(&priv->base.base);
  89 }
  90
  91 struct nvkm_oclass
  92 gt215_therm_oclass = {
  93         .handle = NV_SUBDEV(THERM, 0xa3),
  94         .ofuncs = &(struct nvkm_ofuncs) {
  95                 .ctor = gt215_therm_ctor,
  96                 .dtor = _nvkm_therm_dtor,
  97                 .init = gt215_therm_init,
  98                 .fini = g84_therm_fini,
  99         },
 100 };