LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/therm/gf119.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
  26static int
  27pwm_info(struct nvkm_therm *therm, int line)
  28{
  29        struct nvkm_subdev *subdev = &therm->subdev;
  30        struct nvkm_device *device = subdev->device;
  31        u32 gpio = nvkm_rd32(device, 0x00d610 + (line * 0x04));
  32
  33        switch (gpio & 0x000000c0) {
  34        case 0x00000000: /* normal mode, possibly pwm forced off by us */
  35        case 0x00000040: /* nvio special */
  36                switch (gpio & 0x0000001f) {
  37                case 0x00: return 2;
  38                case 0x19: return 1;
  39                case 0x1c: return 0;
  40                case 0x1e: return 2;
  41                default:
  42                        break;
  43                }
  44                break;
  45        default:
  46                break;
  47        }
  48
  49        nvkm_error(subdev, "GPIO %d unknown PWM: %08x\n", line, gpio);
  50        return -ENODEV;
  51}
  52
  53int
  54gf119_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
  55{
  56        struct nvkm_device *device = therm->subdev.device;
  57        u32 data = enable ? 0x00000040 : 0x00000000;
  58        int indx = pwm_info(therm, line);
  59        if (indx < 0)
  60                return indx;
  61        else if (indx < 2)
  62                nvkm_mask(device, 0x00d610 + (line * 0x04), 0x000000c0, data);
  63        /* nothing to do for indx == 2, it seems hardwired to PTHERM */
  64        return 0;
  65}
  66
  67int
  68gf119_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
  69{
  70        struct nvkm_device *device = therm->subdev.device;
  71        int indx = pwm_info(therm, line);
  72        if (indx < 0)
  73                return indx;
  74        else if (indx < 2) {
  75                if (nvkm_rd32(device, 0x00d610 + (line * 0x04)) & 0x00000040) {
  76                        *divs = nvkm_rd32(device, 0x00e114 + (indx * 8));
  77                        *duty = nvkm_rd32(device, 0x00e118 + (indx * 8));
  78                        return 0;
  79                }
  80        } else if (indx == 2) {
  81                *divs = nvkm_rd32(device, 0x0200d8) & 0x1fff;
  82                *duty = nvkm_rd32(device, 0x0200dc) & 0x1fff;
  83                return 0;
  84        }
  85
  86        return -EINVAL;
  87}
  88
  89int
  90gf119_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
  91{
  92        struct nvkm_device *device = therm->subdev.device;
  93        int indx = pwm_info(therm, line);
  94        if (indx < 0)
  95                return indx;
  96        else if (indx < 2) {
  97                nvkm_wr32(device, 0x00e114 + (indx * 8), divs);
  98                nvkm_wr32(device, 0x00e118 + (indx * 8), duty | 0x80000000);
  99        } else if (indx == 2) {
 100                nvkm_mask(device, 0x0200d8, 0x1fff, divs); /* keep the high bits */
 101                nvkm_wr32(device, 0x0200dc, duty | 0x40000000);
 102        }
 103        return 0;
 104}
 105
 106int
 107gf119_fan_pwm_clock(struct nvkm_therm *therm, int line)
 108{
 109        struct nvkm_device *device = therm->subdev.device;
 110        int indx = pwm_info(therm, line);
 111        if (indx < 0)
 112                return 0;
 113        else if (indx < 2)
 114                return (device->crystal * 1000) / 20;
 115        else
 116                return device->crystal * 1000 / 10;
 117}
 118
 119void
 120gf119_therm_init(struct nvkm_therm *therm)
 121{
 122        struct nvkm_device *device = therm->subdev.device;
 123
 124        g84_sensor_setup(therm);
 125
 126        /* enable fan tach, count revolutions per-second */
 127        nvkm_mask(device, 0x00e720, 0x00000003, 0x00000002);
 128        if (therm->fan->tach.func != DCB_GPIO_UNUSED) {
 129                nvkm_mask(device, 0x00d79c, 0x000000ff, therm->fan->tach.line);
 130                nvkm_wr32(device, 0x00e724, device->crystal * 1000);
 131                nvkm_mask(device, 0x00e720, 0x00000001, 0x00000001);
 132        }
 133        nvkm_mask(device, 0x00e720, 0x00000002, 0x00000000);
 134}
 135
 136static const struct nvkm_therm_func
 137gf119_therm = {
 138        .init = gf119_therm_init,
 139        .fini = g84_therm_fini,
 140        .pwm_ctrl = gf119_fan_pwm_ctrl,
 141        .pwm_get = gf119_fan_pwm_get,
 142        .pwm_set = gf119_fan_pwm_set,
 143        .pwm_clock = gf119_fan_pwm_clock,
 144        .temp_get = g84_temp_get,
 145        .fan_sense = gt215_therm_fan_sense,
 146        .program_alarms = nvkm_therm_program_alarms_polling,
 147};
 148
 149int
 150gf119_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 151                struct nvkm_therm **ptherm)
 152{
 153        return nvkm_therm_new_(&gf119_therm, device, type, inst, ptherm);
 154}
 155