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1/*2 * Copyright 2012 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 * Martin Peres24 */25#include "priv.h"26 27static int28pwm_info(struct nvkm_therm *therm, int *line, int *ctrl, int *indx)29{30 struct nvkm_subdev *subdev = &therm->subdev;31 32 if (*line == 0x04) {33 *ctrl = 0x00e100;34 *line = 4;35 *indx = 0;36 } else37 if (*line == 0x09) {38 *ctrl = 0x00e100;39 *line = 9;40 *indx = 1;41 } else42 if (*line == 0x10) {43 *ctrl = 0x00e28c;44 *line = 0;45 *indx = 0;46 } else {47 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", *line);48 return -ENODEV;49 }50 51 return 0;52}53 54int55nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)56{57 struct nvkm_device *device = therm->subdev.device;58 u32 data = enable ? 0x00000001 : 0x00000000;59 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);60 if (ret == 0)61 nvkm_mask(device, ctrl, 0x00010001 << line, data << line);62 return ret;63}64 65int66nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)67{68 struct nvkm_device *device = therm->subdev.device;69 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);70 if (ret)71 return ret;72 73 if (nvkm_rd32(device, ctrl) & (1 << line)) {74 *divs = nvkm_rd32(device, 0x00e114 + (id * 8));75 *duty = nvkm_rd32(device, 0x00e118 + (id * 8));76 return 0;77 }78 79 return -EINVAL;80}81 82int83nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)84{85 struct nvkm_device *device = therm->subdev.device;86 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);87 if (ret)88 return ret;89 90 nvkm_wr32(device, 0x00e114 + (id * 8), divs);91 nvkm_wr32(device, 0x00e118 + (id * 8), duty | 0x80000000);92 return 0;93}94 95int96nv50_fan_pwm_clock(struct nvkm_therm *therm, int line)97{98 struct nvkm_device *device = therm->subdev.device;99 int pwm_clock;100 101 /* determine the PWM source clock */102 if (device->chipset > 0x50 && device->chipset < 0x94) {103 u8 pwm_div = nvkm_rd32(device, 0x410c);104 if (nvkm_rd32(device, 0xc040) & 0x800000) {105 /* Use the HOST clock (100 MHz)106 * Where does this constant(2.4) comes from? */107 pwm_clock = (100000000 >> pwm_div) * 10 / 24;108 } else {109 /* Where does this constant(20) comes from? */110 pwm_clock = (device->crystal * 1000) >> pwm_div;111 pwm_clock /= 20;112 }113 } else {114 pwm_clock = (device->crystal * 1000) / 20;115 }116 117 return pwm_clock;118}119 120static void121nv50_sensor_setup(struct nvkm_therm *therm)122{123 struct nvkm_device *device = therm->subdev.device;124 nvkm_mask(device, 0x20010, 0x40000000, 0x0);125 mdelay(20); /* wait for the temperature to stabilize */126}127 128static int129nv50_temp_get(struct nvkm_therm *therm)130{131 struct nvkm_device *device = therm->subdev.device;132 struct nvbios_therm_sensor *sensor = &therm->bios_sensor;133 int core_temp;134 135 core_temp = nvkm_rd32(device, 0x20014) & 0x3fff;136 137 /* if the slope or the offset is unset, do no use the sensor */138 if (!sensor->slope_div || !sensor->slope_mult ||139 !sensor->offset_num || !sensor->offset_den)140 return -ENODEV;141 142 core_temp = core_temp * sensor->slope_mult / sensor->slope_div;143 core_temp = core_temp + sensor->offset_num / sensor->offset_den;144 core_temp = core_temp + sensor->offset_constant - 8;145 146 /* reserve negative temperatures for errors */147 if (core_temp < 0)148 core_temp = 0;149 150 return core_temp;151}152 153static void154nv50_therm_init(struct nvkm_therm *therm)155{156 nv50_sensor_setup(therm);157}158 159static const struct nvkm_therm_func160nv50_therm = {161 .init = nv50_therm_init,162 .intr = nv40_therm_intr,163 .pwm_ctrl = nv50_fan_pwm_ctrl,164 .pwm_get = nv50_fan_pwm_get,165 .pwm_set = nv50_fan_pwm_set,166 .pwm_clock = nv50_fan_pwm_clock,167 .temp_get = nv50_temp_get,168 .program_alarms = nvkm_therm_program_alarms_polling,169};170 171int172nv50_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,173 struct nvkm_therm **ptherm)174{175 return nvkm_therm_new_(&nv50_therm, device, type, inst, ptherm);176}177