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 if (*line == 0x04) { 31 *ctrl = 0x00e100; 32 *line = 4; 33 *indx = 0; 34 } else 35 if (*line == 0x09) { 36 *ctrl = 0x00e100; 37 *line = 9; 38 *indx = 1; 39 } else 40 if (*line == 0x10) { 41 *ctrl = 0x00e28c; 42 *line = 0; 43 *indx = 0; 44 } else { 45 nv_error(therm, "unknown pwm ctrl for gpio %d\n", *line); 46 return -ENODEV; 47 } 48 49 return 0; 50 } 51 52 int 53 nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable) 54 { 55 struct nvkm_device *device = therm->subdev.device; 56 u32 data = enable ? 0x00000001 : 0x00000000; 57 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); 58 if (ret == 0) 59 nvkm_mask(device, ctrl, 0x00010001 << line, data << line); 60 return ret; 61 } 62 63 int 64 nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty) 65 { 66 struct nvkm_device *device = therm->subdev.device; 67 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); 68 if (ret) 69 return ret; 70 71 if (nvkm_rd32(device, ctrl) & (1 << line)) { 72 *divs = nvkm_rd32(device, 0x00e114 + (id * 8)); 73 *duty = nvkm_rd32(device, 0x00e118 + (id * 8)); 74 return 0; 75 } 76 77 return -EINVAL; 78 } 79 80 int 81 nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty) 82 { 83 struct nvkm_device *device = therm->subdev.device; 84 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id); 85 if (ret) 86 return ret; 87 88 nvkm_wr32(device, 0x00e114 + (id * 8), divs); 89 nvkm_wr32(device, 0x00e118 + (id * 8), duty | 0x80000000); 90 return 0; 91 } 92 93 int 94 nv50_fan_pwm_clock(struct nvkm_therm *therm, int line) 95 { 96 struct nvkm_device *device = therm->subdev.device; 97 int pwm_clock; 98 99 /* determine the PWM source clock */ 100 if (device->chipset > 0x50 && device->chipset < 0x94) { 101 u8 pwm_div = nvkm_rd32(device, 0x410c); 102 if (nvkm_rd32(device, 0xc040) & 0x800000) { 103 /* Use the HOST clock (100 MHz) 104 * Where does this constant(2.4) comes from? */ 105 pwm_clock = (100000000 >> pwm_div) * 10 / 24; 106 } else { 107 /* Where does this constant(20) comes from? */ 108 pwm_clock = (device->crystal * 1000) >> pwm_div; 109 pwm_clock /= 20; 110 } 111 } else { 112 pwm_clock = (device->crystal * 1000) / 20; 113 } 114 115 return pwm_clock; 116 } 117 118 static void 119 nv50_sensor_setup(struct nvkm_therm *therm) 120 { 121 struct nvkm_device *device = therm->subdev.device; 122 nvkm_mask(device, 0x20010, 0x40000000, 0x0); 123 mdelay(20); /* wait for the temperature to stabilize */ 124 } 125 126 static int 127 nv50_temp_get(struct nvkm_therm *obj) 128 { 129 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 130 struct nvkm_device *device = therm->base.subdev.device; 131 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 132 int core_temp; 133 134 core_temp = nvkm_rd32(device, 0x20014) & 0x3fff; 135 136 /* if the slope or the offset is unset, do no use the sensor */ 137 if (!sensor->slope_div || !sensor->slope_mult || 138 !sensor->offset_num || !sensor->offset_den) 139 return -ENODEV; 140 141 core_temp = core_temp * sensor->slope_mult / sensor->slope_div; 142 core_temp = core_temp + sensor->offset_num / sensor->offset_den; 143 core_temp = core_temp + sensor->offset_constant - 8; 144 145 /* reserve negative temperatures for errors */ 146 if (core_temp < 0) 147 core_temp = 0; 148 149 return core_temp; 150 } 151 152 static int 153 nv50_therm_ctor(struct nvkm_object *parent, 154 struct nvkm_object *engine, 155 struct nvkm_oclass *oclass, void *data, u32 size, 156 struct nvkm_object **pobject) 157 { 158 struct nvkm_therm_priv *therm; 159 int ret; 160 161 ret = nvkm_therm_create(parent, engine, oclass, &therm); 162 *pobject = nv_object(therm); 163 if (ret) 164 return ret; 165 166 therm->base.pwm_ctrl = nv50_fan_pwm_ctrl; 167 therm->base.pwm_get = nv50_fan_pwm_get; 168 therm->base.pwm_set = nv50_fan_pwm_set; 169 therm->base.pwm_clock = nv50_fan_pwm_clock; 170 therm->base.temp_get = nv50_temp_get; 171 therm->sensor.program_alarms = nvkm_therm_program_alarms_polling; 172 nv_subdev(therm)->intr = nv40_therm_intr; 173 174 return nvkm_therm_preinit(&therm->base); 175 } 176 177 static int 178 nv50_therm_init(struct nvkm_object *object) 179 { 180 struct nvkm_therm *therm = (void *)object; 181 182 nv50_sensor_setup(therm); 183 184 return _nvkm_therm_init(object); 185 } 186 187 struct nvkm_oclass 188 nv50_therm_oclass = { 189 .handle = NV_SUBDEV(THERM, 0x50), 190 .ofuncs = &(struct nvkm_ofuncs) { 191 .ctor = nv50_therm_ctor, 192 .dtor = _nvkm_therm_dtor, 193 .init = nv50_therm_init, 194 .fini = _nvkm_therm_fini, 195 }, 196 }; 197