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 <subdev/gpio.h>
  27
  28 int
  29 gt215_therm_fan_sense(struct nvkm_therm *therm)
  30 {
  31         struct nvkm_device *device = therm->subdev.device;
  32         u32 tach = nvkm_rd32(device, 0x00e728) & 0x0000ffff;
  33         u32 ctrl = nvkm_rd32(device, 0x00e720);
  34         if (ctrl & 0x00000001)
  35                 return tach * 60 / 2;
  36         return -ENODEV;
  37 }
  38
  39 void
  40 gt215_therm_init(struct nvkm_therm *therm)
  41 {
  42         struct nvkm_device *device = therm->subdev.device;
  43         struct dcb_gpio_func *tach = &therm->fan->tach;
  44
  45         g84_sensor_setup(therm);
  46
  47         /* enable fan tach, count revolutions per-second */
  48         nvkm_mask(device, 0x00e720, 0x00000003, 0x00000002);
  49         if (tach->func != DCB_GPIO_UNUSED) {
  50                 nvkm_wr32(device, 0x00e724, device->crystal * 1000);
  51                 nvkm_mask(device, 0x00e720, 0x001f0000, tach->line << 16);
  52                 nvkm_mask(device, 0x00e720, 0x00000001, 0x00000001);
  53         }
  54         nvkm_mask(device, 0x00e720, 0x00000002, 0x00000000);
  55 }
  56
  57 static const struct nvkm_therm_func
  58 gt215_therm = {
  59         .init = gt215_therm_init,
  60         .fini = g84_therm_fini,
  61         .pwm_ctrl = nv50_fan_pwm_ctrl,
  62         .pwm_get = nv50_fan_pwm_get,
  63         .pwm_set = nv50_fan_pwm_set,
  64         .pwm_clock = nv50_fan_pwm_clock,
  65         .temp_get = g84_temp_get,
  66         .fan_sense = gt215_therm_fan_sense,
  67         .program_alarms = nvkm_therm_program_alarms_polling,
  68 };
  69
  70 int
  71 gt215_therm_new(struct nvkm_device *device, int index,
  72                struct nvkm_therm **ptherm)
  73 {
  74         return nvkm_therm_new_(&gt215_therm, device, index, ptherm);
  75 }