LXR linux/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
  28int
  29gt215_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
  39static void
  40gt215_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
  57static const struct nvkm_therm_func
  58gt215_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
  70int
  71gt215_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
  72                struct nvkm_therm **ptherm)
  73{
  74        return nvkm_therm_new_(&gt215_therm, device, type, inst, ptherm);
  75}
  76