1 /* $NetBSD: nouveau_nvkm_subdev_therm_nv50.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_nv50.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $"); 29 30 #include "priv.h" 31 32 static int 33 pwm_info(struct nvkm_therm *therm, int *line, int *ctrl, int *indx) 34 { 35 struct nvkm_subdev *subdev = &therm->subdev; 36 37 if (*line == 0x04) { 38 *ctrl = 0x00e100; 39 *line = 4; 40 *indx = 0; 41 } else 42 if (*line == 0x09) { 43 *ctrl = 0x00e100; 44 *line = 9; 45 *indx = 1; 46 } else 47 if (*line == 0x10) { 48 *ctrl = 0x00e28c; 49 *line = 0; 50 *indx = 0; 51 } else { 52 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", *line); 53 return -ENODEV; 54 } 55 56 return 0; 57 } 58 59 int 60 nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable) 61 { 62 struct nvkm_device *device = therm->subdev.device; 63 u32 data = enable ? 0x00000001 : 0x00000000; 64 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); 65 if (ret == 0) 66 nvkm_mask(device, ctrl, 0x00010001 << line, data << line); 67 return ret; 68 } 69 70 int 71 nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty) 72 { 73 struct nvkm_device *device = therm->subdev.device; 74 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); 75 if (ret) 76 return ret; 77 78 if (nvkm_rd32(device, ctrl) & (1 << line)) { 79 *divs = nvkm_rd32(device, 0x00e114 + (id * 8)); 80 *duty = nvkm_rd32(device, 0x00e118 + (id * 8)); 81 return 0; 82 } 83 84 return -EINVAL; 85 } 86 87 int 88 nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty) 89 { 90 struct nvkm_device *device = therm->subdev.device; 91 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); 92 if (ret) 93 return ret; 94 95 nvkm_wr32(device, 0x00e114 + (id * 8), divs); 96 nvkm_wr32(device, 0x00e118 + (id * 8), duty | 0x80000000); 97 return 0; 98 } 99 100 int 101 nv50_fan_pwm_clock(struct nvkm_therm *therm, int line) 102 { 103 struct nvkm_device *device = therm->subdev.device; 104 int pwm_clock; 105 106 /* determine the PWM source clock */ 107 if (device->chipset > 0x50 && device->chipset < 0x94) { 108 u8 pwm_div = nvkm_rd32(device, 0x410c); 109 if (nvkm_rd32(device, 0xc040) & 0x800000) { 110 /* Use the HOST clock (100 MHz) 111 * Where does this constant(2.4) comes from? */ 112 pwm_clock = (100000000 >> pwm_div) * 10 / 24; 113 } else { 114 /* Where does this constant(20) comes from? */ 115 pwm_clock = (device->crystal * 1000) >> pwm_div; 116 pwm_clock /= 20; 117 } 118 } else { 119 pwm_clock = (device->crystal * 1000) / 20; 120 } 121 122 return pwm_clock; 123 } 124 125 static void 126 nv50_sensor_setup(struct nvkm_therm *therm) 127 { 128 struct nvkm_device *device = therm->subdev.device; 129 nvkm_mask(device, 0x20010, 0x40000000, 0x0); 130 mdelay(20); /* wait for the temperature to stabilize */ 131 } 132 133 static int 134 nv50_temp_get(struct nvkm_therm *therm) 135 { 136 struct nvkm_device *device = therm->subdev.device; 137 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 138 int core_temp; 139 140 core_temp = nvkm_rd32(device, 0x20014) & 0x3fff; 141 142 /* if the slope or the offset is unset, do no use the sensor */ 143 if (!sensor->slope_div || !sensor->slope_mult || 144 !sensor->offset_num || !sensor->offset_den) 145 return -ENODEV; 146 147 core_temp = core_temp * sensor->slope_mult / sensor->slope_div; 148 core_temp = core_temp + sensor->offset_num / sensor->offset_den; 149 core_temp = core_temp + sensor->offset_constant - 8; 150 151 /* reserve negative temperatures for errors */ 152 if (core_temp < 0) 153 core_temp = 0; 154 155 return core_temp; 156 } 157 158 static void 159 nv50_therm_init(struct nvkm_therm *therm) 160 { 161 nv50_sensor_setup(therm); 162 } 163 164 static const struct nvkm_therm_func 165 nv50_therm = { 166 .init = nv50_therm_init, 167 .intr = nv40_therm_intr, 168 .pwm_ctrl = nv50_fan_pwm_ctrl, 169 .pwm_get = nv50_fan_pwm_get, 170 .pwm_set = nv50_fan_pwm_set, 171 .pwm_clock = nv50_fan_pwm_clock, 172 .temp_get = nv50_temp_get, 173 .program_alarms = nvkm_therm_program_alarms_polling, 174 }; 175 176 int 177 nv50_therm_new(struct nvkm_device *device, int index, 178 struct nvkm_therm **ptherm) 179 { 180 return nvkm_therm_new_(&nv50_therm, device, index, ptherm); 181 } 182
Indexes created Tue Sep 23 14:10:03 GMT 2025