1 /* $NetBSD: nouveau_nvkm_subdev_therm_nv40.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $ */ 2 3 /* 4 * Copyright 2012 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs 25 * Martin Peres 26 */ 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_therm_nv40.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $"); 29 30 #include "priv.h" 31 32 enum nv40_sensor_style { INVALID_STYLE = -1, OLD_STYLE = 0, NEW_STYLE = 1 }; 33 34 static enum nv40_sensor_style 35 nv40_sensor_style(struct nvkm_therm *therm) 36 { 37 switch (therm->subdev.device->chipset) { 38 case 0x43: 39 case 0x44: 40 case 0x4a: 41 case 0x47: 42 return OLD_STYLE; 43 case 0x46: 44 case 0x49: 45 case 0x4b: 46 case 0x4e: 47 case 0x4c: 48 case 0x67: 49 case 0x68: 50 case 0x63: 51 return NEW_STYLE; 52 default: 53 return INVALID_STYLE; 54 } 55 } 56 57 static int 58 nv40_sensor_setup(struct nvkm_therm *therm) 59 { 60 struct nvkm_device *device = therm->subdev.device; 61 enum nv40_sensor_style style = nv40_sensor_style(therm); 62 63 /* enable ADC readout and disable the ALARM threshold */ 64 if (style == NEW_STYLE) { 65 nvkm_mask(device, 0x15b8, 0x80000000, 0); 66 nvkm_wr32(device, 0x15b0, 0x80003fff); 67 mdelay(20); /* wait for the temperature to stabilize */ 68 return nvkm_rd32(device, 0x15b4) & 0x3fff; 69 } else if (style == OLD_STYLE) { 70 nvkm_wr32(device, 0x15b0, 0xff); 71 mdelay(20); /* wait for the temperature to stabilize */ 72 return nvkm_rd32(device, 0x15b4) & 0xff; 73 } else 74 return -ENODEV; 75 } 76 77 static int 78 nv40_temp_get(struct nvkm_therm *therm) 79 { 80 struct nvkm_device *device = therm->subdev.device; 81 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 82 enum nv40_sensor_style style = nv40_sensor_style(therm); 83 int core_temp; 84 85 if (style == NEW_STYLE) { 86 nvkm_wr32(device, 0x15b0, 0x80003fff); 87 core_temp = nvkm_rd32(device, 0x15b4) & 0x3fff; 88 } else if (style == OLD_STYLE) { 89 nvkm_wr32(device, 0x15b0, 0xff); 90 core_temp = nvkm_rd32(device, 0x15b4) & 0xff; 91 } else 92 return -ENODEV; 93 94 /* if the slope or the offset is unset, do no use the sensor */ 95 if (!sensor->slope_div || !sensor->slope_mult || 96 !sensor->offset_num || !sensor->offset_den) 97 return -ENODEV; 98 99 core_temp = core_temp * sensor->slope_mult / sensor->slope_div; 100 core_temp = core_temp + sensor->offset_num / sensor->offset_den; 101 core_temp = core_temp + sensor->offset_constant - 8; 102 103 /* reserve negative temperatures for errors */ 104 if (core_temp < 0) 105 core_temp = 0; 106 107 return core_temp; 108 } 109 110 static int 111 nv40_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable) 112 { 113 struct nvkm_subdev *subdev = &therm->subdev; 114 struct nvkm_device *device = subdev->device; 115 u32 mask = enable ? 0x80000000 : 0x00000000; 116 if (line == 2) nvkm_mask(device, 0x0010f0, 0x80000000, mask); 117 else if (line == 9) nvkm_mask(device, 0x0015f4, 0x80000000, mask); 118 else { 119 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line); 120 return -ENODEV; 121 } 122 return 0; 123 } 124 125 static int 126 nv40_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty) 127 { 128 struct nvkm_subdev *subdev = &therm->subdev; 129 struct nvkm_device *device = subdev->device; 130 if (line == 2) { 131 u32 reg = nvkm_rd32(device, 0x0010f0); 132 if (reg & 0x80000000) { 133 *duty = (reg & 0x7fff0000) >> 16; 134 *divs = (reg & 0x00007fff); 135 return 0; 136 } 137 } else 138 if (line == 9) { 139 u32 reg = nvkm_rd32(device, 0x0015f4); 140 if (reg & 0x80000000) { 141 *divs = nvkm_rd32(device, 0x0015f8); 142 *duty = (reg & 0x7fffffff); 143 return 0; 144 } 145 } else { 146 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line); 147 return -ENODEV; 148 } 149 150 return -EINVAL; 151 } 152 153 static int 154 nv40_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty) 155 { 156 struct nvkm_subdev *subdev = &therm->subdev; 157 struct nvkm_device *device = subdev->device; 158 if (line == 2) { 159 nvkm_mask(device, 0x0010f0, 0x7fff7fff, (duty << 16) | divs); 160 } else 161 if (line == 9) { 162 nvkm_wr32(device, 0x0015f8, divs); 163 nvkm_mask(device, 0x0015f4, 0x7fffffff, duty); 164 } else { 165 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line); 166 return -ENODEV; 167 } 168 169 return 0; 170 } 171 172 void 173 nv40_therm_intr(struct nvkm_therm *therm) 174 { 175 struct nvkm_subdev *subdev = &therm->subdev; 176 struct nvkm_device *device = subdev->device; 177 uint32_t stat = nvkm_rd32(device, 0x1100); 178 179 /* traitement */ 180 181 /* ack all IRQs */ 182 nvkm_wr32(device, 0x1100, 0x70000); 183 184 nvkm_error(subdev, "THERM received an IRQ: stat = %x\n", stat); 185 } 186 187 static void 188 nv40_therm_init(struct nvkm_therm *therm) 189 { 190 nv40_sensor_setup(therm); 191 } 192 193 static const struct nvkm_therm_func 194 nv40_therm = { 195 .init = nv40_therm_init, 196 .intr = nv40_therm_intr, 197 .pwm_ctrl = nv40_fan_pwm_ctrl, 198 .pwm_get = nv40_fan_pwm_get, 199 .pwm_set = nv40_fan_pwm_set, 200 .temp_get = nv40_temp_get, 201 .program_alarms = nvkm_therm_program_alarms_polling, 202 }; 203 204 int 205 nv40_therm_new(struct nvkm_device *device, int index, 206 struct nvkm_therm **ptherm) 207 { 208 return nvkm_therm_new_(&nv40_therm, device, index, ptherm); 209 } 210
Indexes created Fri Sep 26 20:09:58 GMT 2025