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 static int 28 pwm_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 } else 37 if (*line == 0x09) { 38 *ctrl = 0x00e100; 39 *line = 9; 40 *indx = 1; 41 } else 42 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 54 int 55 nv50_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 65 int 66 nv50_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 82 int 83 nv50_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 95 int 96 nv50_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 } 119 120 static void 121 nv50_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 } 127 128 static int 129 nv50_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 } 152 153 static void 154 nv50_therm_init(struct nvkm_therm *therm) 155 { 156 nv50_sensor_setup(therm); 157 } 158 159 static const struct nvkm_therm_func 160 nv50_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 }; 170 171 int 172 nv50_therm_new(struct nvkm_device *device, int index, 173 struct nvkm_therm **ptherm) 174 { 175 return nvkm_therm_new_(&nv50_therm, device, index, ptherm); 176 } 177