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 #include <subdev/fuse.h> 28 29 int 30 g84_temp_get(struct nvkm_therm *therm) 31 { 32 struct nvkm_device *device = therm->subdev.device; 33 34 if (nvkm_fuse_read(device->fuse, 0x1a8) == 1) 35 return nvkm_rd32(device, 0x20400); 36 else 37 return -ENODEV; 38 } 39 40 void 41 g84_sensor_setup(struct nvkm_therm *therm) 42 { 43 struct nvkm_device *device = therm->subdev.device; 44 45 /* enable temperature reading for cards with insane defaults */ 46 if (nvkm_fuse_read(device->fuse, 0x1a8) == 1) { 47 nvkm_mask(device, 0x20008, 0x80008000, 0x80000000); 48 nvkm_mask(device, 0x2000c, 0x80000003, 0x00000000); 49 mdelay(20); /* wait for the temperature to stabilize */ 50 } 51 } 52 53 static void 54 g84_therm_program_alarms(struct nvkm_therm *therm) 55 { 56 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 57 struct nvkm_subdev *subdev = &therm->subdev; 58 struct nvkm_device *device = subdev->device; 59 unsigned long flags; 60 61 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); 62 63 /* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */ 64 nvkm_wr32(device, 0x20000, 0x000003ff); 65 66 /* shutdown: The computer should be shutdown when reached */ 67 nvkm_wr32(device, 0x20484, sensor->thrs_shutdown.hysteresis); 68 nvkm_wr32(device, 0x20480, sensor->thrs_shutdown.temp); 69 70 /* THRS_1 : fan boost*/ 71 nvkm_wr32(device, 0x204c4, sensor->thrs_fan_boost.temp); 72 73 /* THRS_2 : critical */ 74 nvkm_wr32(device, 0x204c0, sensor->thrs_critical.temp); 75 76 /* THRS_4 : down clock */ 77 nvkm_wr32(device, 0x20414, sensor->thrs_down_clock.temp); 78 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); 79 80 nvkm_debug(subdev, 81 "Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n", 82 sensor->thrs_fan_boost.temp, 83 sensor->thrs_fan_boost.hysteresis, 84 sensor->thrs_down_clock.temp, 85 sensor->thrs_down_clock.hysteresis, 86 sensor->thrs_critical.temp, 87 sensor->thrs_critical.hysteresis, 88 sensor->thrs_shutdown.temp, 89 sensor->thrs_shutdown.hysteresis); 90 91 } 92 93 /* must be called with alarm_program_lock taken ! */ 94 static void 95 g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm, 96 uint32_t thrs_reg, u8 status_bit, 97 const struct nvbios_therm_threshold *thrs, 98 enum nvkm_therm_thrs thrs_name) 99 { 100 struct nvkm_device *device = therm->subdev.device; 101 enum nvkm_therm_thrs_direction direction; 102 enum nvkm_therm_thrs_state prev_state, new_state; 103 int temp, cur; 104 105 prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name); 106 temp = nvkm_rd32(device, thrs_reg); 107 108 /* program the next threshold */ 109 if (temp == thrs->temp) { 110 nvkm_wr32(device, thrs_reg, thrs->temp - thrs->hysteresis); 111 new_state = NVKM_THERM_THRS_HIGHER; 112 } else { 113 nvkm_wr32(device, thrs_reg, thrs->temp); 114 new_state = NVKM_THERM_THRS_LOWER; 115 } 116 117 /* fix the state (in case someone reprogrammed the alarms) */ 118 cur = therm->func->temp_get(therm); 119 if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp) 120 new_state = NVKM_THERM_THRS_HIGHER; 121 else if (new_state == NVKM_THERM_THRS_HIGHER && 122 cur < thrs->temp - thrs->hysteresis) 123 new_state = NVKM_THERM_THRS_LOWER; 124 nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state); 125 126 /* find the direction */ 127 if (prev_state < new_state) 128 direction = NVKM_THERM_THRS_RISING; 129 else if (prev_state > new_state) 130 direction = NVKM_THERM_THRS_FALLING; 131 else 132 return; 133 134 /* advertise a change in direction */ 135 nvkm_therm_sensor_event(therm, thrs_name, direction); 136 } 137 138 static void 139 g84_therm_intr(struct nvkm_therm *therm) 140 { 141 struct nvkm_subdev *subdev = &therm->subdev; 142 struct nvkm_device *device = subdev->device; 143 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 144 unsigned long flags; 145 uint32_t intr; 146 147 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); 148 149 intr = nvkm_rd32(device, 0x20100) & 0x3ff; 150 151 /* THRS_4: downclock */ 152 if (intr & 0x002) { 153 g84_therm_threshold_hyst_emulation(therm, 0x20414, 24, 154 &sensor->thrs_down_clock, 155 NVKM_THERM_THRS_DOWNCLOCK); 156 intr &= ~0x002; 157 } 158 159 /* shutdown */ 160 if (intr & 0x004) { 161 g84_therm_threshold_hyst_emulation(therm, 0x20480, 20, 162 &sensor->thrs_shutdown, 163 NVKM_THERM_THRS_SHUTDOWN); 164 intr &= ~0x004; 165 } 166 167 /* THRS_1 : fan boost */ 168 if (intr & 0x008) { 169 g84_therm_threshold_hyst_emulation(therm, 0x204c4, 21, 170 &sensor->thrs_fan_boost, 171 NVKM_THERM_THRS_FANBOOST); 172 intr &= ~0x008; 173 } 174 175 /* THRS_2 : critical */ 176 if (intr & 0x010) { 177 g84_therm_threshold_hyst_emulation(therm, 0x204c0, 22, 178 &sensor->thrs_critical, 179 NVKM_THERM_THRS_CRITICAL); 180 intr &= ~0x010; 181 } 182 183 if (intr) 184 nvkm_error(subdev, "intr %08x\n", intr); 185 186 /* ACK everything */ 187 nvkm_wr32(device, 0x20100, 0xffffffff); 188 nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */ 189 190 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); 191 } 192 193 void 194 g84_therm_fini(struct nvkm_therm *therm) 195 { 196 struct nvkm_device *device = therm->subdev.device; 197 198 /* Disable PTherm IRQs */ 199 nvkm_wr32(device, 0x20000, 0x00000000); 200 201 /* ACK all PTherm IRQs */ 202 nvkm_wr32(device, 0x20100, 0xffffffff); 203 nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */ 204 } 205 206 void 207 g84_therm_init(struct nvkm_therm *therm) 208 { 209 g84_sensor_setup(therm); 210 } 211 212 static const struct nvkm_therm_func 213 g84_therm = { 214 .init = g84_therm_init, 215 .fini = g84_therm_fini, 216 .intr = g84_therm_intr, 217 .pwm_ctrl = nv50_fan_pwm_ctrl, 218 .pwm_get = nv50_fan_pwm_get, 219 .pwm_set = nv50_fan_pwm_set, 220 .pwm_clock = nv50_fan_pwm_clock, 221 .temp_get = g84_temp_get, 222 .program_alarms = g84_therm_program_alarms, 223 }; 224 225 int 226 g84_therm_new(struct nvkm_device *device, int index, struct nvkm_therm **ptherm) 227 { 228 struct nvkm_therm *therm; 229 int ret; 230 231 ret = nvkm_therm_new_(&g84_therm, device, index, &therm); 232 *ptherm = therm; 233 if (ret) 234 return ret; 235 236 /* init the thresholds */ 237 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_SHUTDOWN, 238 NVKM_THERM_THRS_LOWER); 239 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_FANBOOST, 240 NVKM_THERM_THRS_LOWER); 241 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_CRITICAL, 242 NVKM_THERM_THRS_LOWER); 243 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_DOWNCLOCK, 244 NVKM_THERM_THRS_LOWER); 245 return 0; 246 } 247