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 enum nv40_sensor_style { INVALID_STYLE = -1, OLD_STYLE = 0, NEW_STYLE = 1 }; 28 29 static enum nv40_sensor_style 30 nv40_sensor_style(struct nvkm_therm *therm) 31 { 32 switch (therm->subdev.device->chipset) { 33 case 0x43: 34 case 0x44: 35 case 0x4a: 36 case 0x47: 37 return OLD_STYLE; 38 case 0x46: 39 case 0x49: 40 case 0x4b: 41 case 0x4e: 42 case 0x4c: 43 case 0x67: 44 case 0x68: 45 case 0x63: 46 return NEW_STYLE; 47 default: 48 return INVALID_STYLE; 49 } 50 } 51 52 static int 53 nv40_sensor_setup(struct nvkm_therm *therm) 54 { 55 struct nvkm_device *device = therm->subdev.device; 56 enum nv40_sensor_style style = nv40_sensor_style(therm); 57 58 /* enable ADC readout and disable the ALARM threshold */ 59 if (style == NEW_STYLE) { 60 nvkm_mask(device, 0x15b8, 0x80000000, 0); 61 nvkm_wr32(device, 0x15b0, 0x80003fff); 62 mdelay(20); /* wait for the temperature to stabilize */ 63 return nvkm_rd32(device, 0x15b4) & 0x3fff; 64 } else if (style == OLD_STYLE) { 65 nvkm_wr32(device, 0x15b0, 0xff); 66 mdelay(20); /* wait for the temperature to stabilize */ 67 return nvkm_rd32(device, 0x15b4) & 0xff; 68 } else 69 return -ENODEV; 70 } 71 72 static int 73 nv40_temp_get(struct nvkm_therm *therm) 74 { 75 struct nvkm_device *device = therm->subdev.device; 76 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 77 enum nv40_sensor_style style = nv40_sensor_style(therm); 78 int core_temp; 79 80 if (style == NEW_STYLE) { 81 nvkm_wr32(device, 0x15b0, 0x80003fff); 82 core_temp = nvkm_rd32(device, 0x15b4) & 0x3fff; 83 } else if (style == OLD_STYLE) { 84 nvkm_wr32(device, 0x15b0, 0xff); 85 core_temp = nvkm_rd32(device, 0x15b4) & 0xff; 86 } else 87 return -ENODEV; 88 89 /* if the slope or the offset is unset, do no use the sensor */ 90 if (!sensor->slope_div || !sensor->slope_mult || 91 !sensor->offset_num || !sensor->offset_den) 92 return -ENODEV; 93 94 core_temp = core_temp * sensor->slope_mult / sensor->slope_div; 95 core_temp = core_temp + sensor->offset_num / sensor->offset_den; 96 core_temp = core_temp + sensor->offset_constant - 8; 97 98 /* reserve negative temperatures for errors */ 99 if (core_temp < 0) 100 core_temp = 0; 101 102 return core_temp; 103 } 104 105 static int 106 nv40_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable) 107 { 108 struct nvkm_subdev *subdev = &therm->subdev; 109 struct nvkm_device *device = subdev->device; 110 u32 mask = enable ? 0x80000000 : 0x00000000; 111 if (line == 2) nvkm_mask(device, 0x0010f0, 0x80000000, mask); 112 else if (line == 9) nvkm_mask(device, 0x0015f4, 0x80000000, mask); 113 else { 114 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line); 115 return -ENODEV; 116 } 117 return 0; 118 } 119 120 static int 121 nv40_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty) 122 { 123 struct nvkm_subdev *subdev = &therm->subdev; 124 struct nvkm_device *device = subdev->device; 125 if (line == 2) { 126 u32 reg = nvkm_rd32(device, 0x0010f0); 127 if (reg & 0x80000000) { 128 *duty = (reg & 0x7fff0000) >> 16; 129 *divs = (reg & 0x00007fff); 130 return 0; 131 } 132 } else 133 if (line == 9) { 134 u32 reg = nvkm_rd32(device, 0x0015f4); 135 if (reg & 0x80000000) { 136 *divs = nvkm_rd32(device, 0x0015f8); 137 *duty = (reg & 0x7fffffff); 138 return 0; 139 } 140 } else { 141 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line); 142 return -ENODEV; 143 } 144 145 return -EINVAL; 146 } 147 148 static int 149 nv40_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty) 150 { 151 struct nvkm_subdev *subdev = &therm->subdev; 152 struct nvkm_device *device = subdev->device; 153 if (line == 2) { 154 nvkm_mask(device, 0x0010f0, 0x7fff7fff, (duty << 16) | divs); 155 } else 156 if (line == 9) { 157 nvkm_wr32(device, 0x0015f8, divs); 158 nvkm_mask(device, 0x0015f4, 0x7fffffff, duty); 159 } else { 160 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line); 161 return -ENODEV; 162 } 163 164 return 0; 165 } 166 167 void 168 nv40_therm_intr(struct nvkm_therm *therm) 169 { 170 struct nvkm_subdev *subdev = &therm->subdev; 171 struct nvkm_device *device = subdev->device; 172 uint32_t stat = nvkm_rd32(device, 0x1100); 173 174 /* traitement */ 175 176 /* ack all IRQs */ 177 nvkm_wr32(device, 0x1100, 0x70000); 178 179 nvkm_error(subdev, "THERM received an IRQ: stat = %x\n", stat); 180 } 181 182 static void 183 nv40_therm_init(struct nvkm_therm *therm) 184 { 185 nv40_sensor_setup(therm); 186 } 187 188 static const struct nvkm_therm_func 189 nv40_therm = { 190 .init = nv40_therm_init, 191 .intr = nv40_therm_intr, 192 .pwm_ctrl = nv40_fan_pwm_ctrl, 193 .pwm_get = nv40_fan_pwm_get, 194 .pwm_set = nv40_fan_pwm_set, 195 .temp_get = nv40_temp_get, 196 .program_alarms = nvkm_therm_program_alarms_polling, 197 }; 198 199 int 200 nv40_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, 201 struct nvkm_therm **ptherm) 202 { 203 return nvkm_therm_new_(&nv40_therm, device, type, inst, ptherm); 204 } 205