LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/therm/g84.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 <subdev/fuse.h>
  28
  29int
  30g84_temp_get(struct nvkm_therm *therm)
  31{
  32        struct nvkm_device *device = therm->subdev.device;
  33
  34        if (nvkm_fuse_read(device->fuse, 0x1a8) == 1)
  35                return nvkm_rd32(device, 0x20400);
  36        else
  37                return -ENODEV;
  38}
  39
  40void
  41g84_sensor_setup(struct nvkm_therm *therm)
  42{
  43        struct nvkm_device *device = therm->subdev.device;
  44
  45        /* enable temperature reading for cards with insane defaults */
  46        if (nvkm_fuse_read(device->fuse, 0x1a8) == 1) {
  47                nvkm_mask(device, 0x20008, 0x80008000, 0x80000000);
  48                nvkm_mask(device, 0x2000c, 0x80000003, 0x00000000);
  49                mdelay(20); /* wait for the temperature to stabilize */
  50        }
  51}
  52
  53static void
  54g84_therm_program_alarms(struct nvkm_therm *therm)
  55{
  56        struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
  57        struct nvkm_subdev *subdev = &therm->subdev;
  58        struct nvkm_device *device = subdev->device;
  59        unsigned long flags;
  60
  61        spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
  62
  63        /* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */
  64        nvkm_wr32(device, 0x20000, 0x000003ff);
  65
  66        /* shutdown: The computer should be shutdown when reached */
  67        nvkm_wr32(device, 0x20484, sensor->thrs_shutdown.hysteresis);
  68        nvkm_wr32(device, 0x20480, sensor->thrs_shutdown.temp);
  69
  70        /* THRS_1 : fan boost*/
  71        nvkm_wr32(device, 0x204c4, sensor->thrs_fan_boost.temp);
  72
  73        /* THRS_2 : critical */
  74        nvkm_wr32(device, 0x204c0, sensor->thrs_critical.temp);
  75
  76        /* THRS_4 : down clock */
  77        nvkm_wr32(device, 0x20414, sensor->thrs_down_clock.temp);
  78        spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
  79
  80        nvkm_debug(subdev,
  81                   "Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
  82                   sensor->thrs_fan_boost.temp,
  83                   sensor->thrs_fan_boost.hysteresis,
  84                   sensor->thrs_down_clock.temp,
  85                   sensor->thrs_down_clock.hysteresis,
  86                   sensor->thrs_critical.temp,
  87                   sensor->thrs_critical.hysteresis,
  88                   sensor->thrs_shutdown.temp,
  89                   sensor->thrs_shutdown.hysteresis);
  90
  91}
  92
  93/* must be called with alarm_program_lock taken ! */
  94static void
  95g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm,
  96                                   uint32_t thrs_reg, u8 status_bit,
  97                                   const struct nvbios_therm_threshold *thrs,
  98                                   enum nvkm_therm_thrs thrs_name)
  99{
 100        struct nvkm_device *device = therm->subdev.device;
 101        enum nvkm_therm_thrs_direction direction;
 102        enum nvkm_therm_thrs_state prev_state, new_state;
 103        int temp, cur;
 104
 105        prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
 106        temp = nvkm_rd32(device, thrs_reg);
 107
 108        /* program the next threshold */
 109        if (temp == thrs->temp) {
 110                nvkm_wr32(device, thrs_reg, thrs->temp - thrs->hysteresis);
 111                new_state = NVKM_THERM_THRS_HIGHER;
 112        } else {
 113                nvkm_wr32(device, thrs_reg, thrs->temp);
 114                new_state = NVKM_THERM_THRS_LOWER;
 115        }
 116
 117        /* fix the state (in case someone reprogrammed the alarms) */
 118        cur = therm->func->temp_get(therm);
 119        if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp)
 120                new_state = NVKM_THERM_THRS_HIGHER;
 121        else if (new_state == NVKM_THERM_THRS_HIGHER &&
 122                cur < thrs->temp - thrs->hysteresis)
 123                new_state = NVKM_THERM_THRS_LOWER;
 124        nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
 125
 126        /* find the direction */
 127        if (prev_state < new_state)
 128                direction = NVKM_THERM_THRS_RISING;
 129        else if (prev_state > new_state)
 130                direction = NVKM_THERM_THRS_FALLING;
 131        else
 132                return;
 133
 134        /* advertise a change in direction */
 135        nvkm_therm_sensor_event(therm, thrs_name, direction);
 136}
 137
 138static void
 139g84_therm_intr(struct nvkm_therm *therm)
 140{
 141        struct nvkm_subdev *subdev = &therm->subdev;
 142        struct nvkm_device *device = subdev->device;
 143        struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
 144        unsigned long flags;
 145        uint32_t intr;
 146
 147        spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
 148
 149        intr = nvkm_rd32(device, 0x20100) & 0x3ff;
 150
 151        /* THRS_4: downclock */
 152        if (intr & 0x002) {
 153                g84_therm_threshold_hyst_emulation(therm, 0x20414, 24,
 154                                                   &sensor->thrs_down_clock,
 155                                                   NVKM_THERM_THRS_DOWNCLOCK);
 156                intr &= ~0x002;
 157        }
 158
 159        /* shutdown */
 160        if (intr & 0x004) {
 161                g84_therm_threshold_hyst_emulation(therm, 0x20480, 20,
 162                                                   &sensor->thrs_shutdown,
 163                                                   NVKM_THERM_THRS_SHUTDOWN);
 164                intr &= ~0x004;
 165        }
 166
 167        /* THRS_1 : fan boost */
 168        if (intr & 0x008) {
 169                g84_therm_threshold_hyst_emulation(therm, 0x204c4, 21,
 170                                                   &sensor->thrs_fan_boost,
 171                                                   NVKM_THERM_THRS_FANBOOST);
 172                intr &= ~0x008;
 173        }
 174
 175        /* THRS_2 : critical */
 176        if (intr & 0x010) {
 177                g84_therm_threshold_hyst_emulation(therm, 0x204c0, 22,
 178                                                   &sensor->thrs_critical,
 179                                                   NVKM_THERM_THRS_CRITICAL);
 180                intr &= ~0x010;
 181        }
 182
 183        if (intr)
 184                nvkm_error(subdev, "intr %08x\n", intr);
 185
 186        /* ACK everything */
 187        nvkm_wr32(device, 0x20100, 0xffffffff);
 188        nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
 189
 190        spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
 191}
 192
 193void
 194g84_therm_fini(struct nvkm_therm *therm)
 195{
 196        struct nvkm_device *device = therm->subdev.device;
 197
 198        /* Disable PTherm IRQs */
 199        nvkm_wr32(device, 0x20000, 0x00000000);
 200
 201        /* ACK all PTherm IRQs */
 202        nvkm_wr32(device, 0x20100, 0xffffffff);
 203        nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
 204}
 205
 206void
 207g84_therm_init(struct nvkm_therm *therm)
 208{
 209        g84_sensor_setup(therm);
 210}
 211
 212static const struct nvkm_therm_func
 213g84_therm = {
 214        .init = g84_therm_init,
 215        .fini = g84_therm_fini,
 216        .intr = g84_therm_intr,
 217        .pwm_ctrl = nv50_fan_pwm_ctrl,
 218        .pwm_get = nv50_fan_pwm_get,
 219        .pwm_set = nv50_fan_pwm_set,
 220        .pwm_clock = nv50_fan_pwm_clock,
 221        .temp_get = g84_temp_get,
 222        .program_alarms = g84_therm_program_alarms,
 223};
 224
 225int
 226g84_therm_new(struct nvkm_device *device, int index, struct nvkm_therm **ptherm)
 227{
 228        struct nvkm_therm *therm;
 229        int ret;
 230
 231        ret = nvkm_therm_new_(&g84_therm, device, index, &therm);
 232        *ptherm = therm;
 233        if (ret)
 234                return ret;
 235
 236        /* init the thresholds */
 237        nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_SHUTDOWN,
 238                                                     NVKM_THERM_THRS_LOWER);
 239        nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_FANBOOST,
 240                                                     NVKM_THERM_THRS_LOWER);
 241        nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_CRITICAL,
 242                                                     NVKM_THERM_THRS_LOWER);
 243        nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_DOWNCLOCK,
 244                                                     NVKM_THERM_THRS_LOWER);
 245        return 0;
 246}
 247