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 struct nvkm_fuse *fuse = nvkm_fuse(therm); 34 35 if (nv_ro32(fuse, 0x1a8) == 1) 36 return nvkm_rd32(device, 0x20400); 37 else 38 return -ENODEV; 39 } 40 41 void 42 g84_sensor_setup(struct nvkm_therm *therm) 43 { 44 struct nvkm_device *device = therm->subdev.device; 45 struct nvkm_fuse *fuse = nvkm_fuse(therm); 46 47 /* enable temperature reading for cards with insane defaults */ 48 if (nv_ro32(fuse, 0x1a8) == 1) { 49 nvkm_mask(device, 0x20008, 0x80008000, 0x80000000); 50 nvkm_mask(device, 0x2000c, 0x80000003, 0x00000000); 51 mdelay(20); /* wait for the temperature to stabilize */ 52 } 53 } 54 55 static void 56 g84_therm_program_alarms(struct nvkm_therm *obj) 57 { 58 struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base); 59 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 60 struct nvkm_subdev *subdev = &therm->base.subdev; 61 struct nvkm_device *device = subdev->device; 62 unsigned long flags; 63 64 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); 65 66 /* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */ 67 nvkm_wr32(device, 0x20000, 0x000003ff); 68 69 /* shutdown: The computer should be shutdown when reached */ 70 nvkm_wr32(device, 0x20484, sensor->thrs_shutdown.hysteresis); 71 nvkm_wr32(device, 0x20480, sensor->thrs_shutdown.temp); 72 73 /* THRS_1 : fan boost*/ 74 nvkm_wr32(device, 0x204c4, sensor->thrs_fan_boost.temp); 75 76 /* THRS_2 : critical */ 77 nvkm_wr32(device, 0x204c0, sensor->thrs_critical.temp); 78 79 /* THRS_4 : down clock */ 80 nvkm_wr32(device, 0x20414, sensor->thrs_down_clock.temp); 81 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); 82 83 nvkm_debug(subdev, 84 "Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n", 85 sensor->thrs_fan_boost.temp, 86 sensor->thrs_fan_boost.hysteresis, 87 sensor->thrs_down_clock.temp, 88 sensor->thrs_down_clock.hysteresis, 89 sensor->thrs_critical.temp, 90 sensor->thrs_critical.hysteresis, 91 sensor->thrs_shutdown.temp, 92 sensor->thrs_shutdown.hysteresis); 93 94 } 95 96 /* must be called with alarm_program_lock taken ! */ 97 static void 98 g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm, 99 uint32_t thrs_reg, u8 status_bit, 100 const struct nvbios_therm_threshold *thrs, 101 enum nvkm_therm_thrs thrs_name) 102 { 103 struct nvkm_device *device = therm->subdev.device; 104 enum nvkm_therm_thrs_direction direction; 105 enum nvkm_therm_thrs_state prev_state, new_state; 106 int temp, cur; 107 108 prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name); 109 temp = nvkm_rd32(device, thrs_reg); 110 111 /* program the next threshold */ 112 if (temp == thrs->temp) { 113 nvkm_wr32(device, thrs_reg, thrs->temp - thrs->hysteresis); 114 new_state = NVKM_THERM_THRS_HIGHER; 115 } else { 116 nvkm_wr32(device, thrs_reg, thrs->temp); 117 new_state = NVKM_THERM_THRS_LOWER; 118 } 119 120 /* fix the state (in case someone reprogrammed the alarms) */ 121 cur = therm->temp_get(therm); 122 if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp) 123 new_state = NVKM_THERM_THRS_HIGHER; 124 else if (new_state == NVKM_THERM_THRS_HIGHER && 125 cur < thrs->temp - thrs->hysteresis) 126 new_state = NVKM_THERM_THRS_LOWER; 127 nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state); 128 129 /* find the direction */ 130 if (prev_state < new_state) 131 direction = NVKM_THERM_THRS_RISING; 132 else if (prev_state > new_state) 133 direction = NVKM_THERM_THRS_FALLING; 134 else 135 return; 136 137 /* advertise a change in direction */ 138 nvkm_therm_sensor_event(therm, thrs_name, direction); 139 } 140 141 static void 142 g84_therm_intr(struct nvkm_subdev *subdev) 143 { 144 struct nvkm_therm_priv *therm = (void *)subdev; 145 struct nvkm_device *device = therm->base.subdev.device; 146 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 147 unsigned long flags; 148 uint32_t intr; 149 150 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); 151 152 intr = nvkm_rd32(device, 0x20100) & 0x3ff; 153 154 /* THRS_4: downclock */ 155 if (intr & 0x002) { 156 g84_therm_threshold_hyst_emulation(&therm->base, 0x20414, 24, 157 &sensor->thrs_down_clock, 158 NVKM_THERM_THRS_DOWNCLOCK); 159 intr &= ~0x002; 160 } 161 162 /* shutdown */ 163 if (intr & 0x004) { 164 g84_therm_threshold_hyst_emulation(&therm->base, 0x20480, 20, 165 &sensor->thrs_shutdown, 166 NVKM_THERM_THRS_SHUTDOWN); 167 intr &= ~0x004; 168 } 169 170 /* THRS_1 : fan boost */ 171 if (intr & 0x008) { 172 g84_therm_threshold_hyst_emulation(&therm->base, 0x204c4, 21, 173 &sensor->thrs_fan_boost, 174 NVKM_THERM_THRS_FANBOOST); 175 intr &= ~0x008; 176 } 177 178 /* THRS_2 : critical */ 179 if (intr & 0x010) { 180 g84_therm_threshold_hyst_emulation(&therm->base, 0x204c0, 22, 181 &sensor->thrs_critical, 182 NVKM_THERM_THRS_CRITICAL); 183 intr &= ~0x010; 184 } 185 186 if (intr) 187 nvkm_error(subdev, "intr %08x\n", intr); 188 189 /* ACK everything */ 190 nvkm_wr32(device, 0x20100, 0xffffffff); 191 nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */ 192 193 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); 194 } 195 196 static int 197 g84_therm_init(struct nvkm_object *object) 198 { 199 struct nvkm_therm_priv *therm = (void *)object; 200 int ret; 201 202 ret = nvkm_therm_init(&therm->base); 203 if (ret) 204 return ret; 205 206 g84_sensor_setup(&therm->base); 207 return 0; 208 } 209 210 static int 211 g84_therm_ctor(struct nvkm_object *parent, struct nvkm_object *engine, 212 struct nvkm_oclass *oclass, void *data, u32 size, 213 struct nvkm_object **pobject) 214 { 215 struct nvkm_therm_priv *therm; 216 int ret; 217 218 ret = nvkm_therm_create(parent, engine, oclass, &therm); 219 *pobject = nv_object(therm); 220 if (ret) 221 return ret; 222 223 therm->base.pwm_ctrl = nv50_fan_pwm_ctrl; 224 therm->base.pwm_get = nv50_fan_pwm_get; 225 therm->base.pwm_set = nv50_fan_pwm_set; 226 therm->base.pwm_clock = nv50_fan_pwm_clock; 227 therm->base.temp_get = g84_temp_get; 228 therm->sensor.program_alarms = g84_therm_program_alarms; 229 nv_subdev(therm)->intr = g84_therm_intr; 230 231 /* init the thresholds */ 232 nvkm_therm_sensor_set_threshold_state(&therm->base, 233 NVKM_THERM_THRS_SHUTDOWN, 234 NVKM_THERM_THRS_LOWER); 235 nvkm_therm_sensor_set_threshold_state(&therm->base, 236 NVKM_THERM_THRS_FANBOOST, 237 NVKM_THERM_THRS_LOWER); 238 nvkm_therm_sensor_set_threshold_state(&therm->base, 239 NVKM_THERM_THRS_CRITICAL, 240 NVKM_THERM_THRS_LOWER); 241 nvkm_therm_sensor_set_threshold_state(&therm->base, 242 NVKM_THERM_THRS_DOWNCLOCK, 243 NVKM_THERM_THRS_LOWER); 244 245 return nvkm_therm_preinit(&therm->base); 246 } 247 248 int 249 g84_therm_fini(struct nvkm_object *object, bool suspend) 250 { 251 struct nvkm_therm *therm = (void *)object; 252 struct nvkm_device *device = therm->subdev.device; 253 254 /* Disable PTherm IRQs */ 255 nvkm_wr32(device, 0x20000, 0x00000000); 256 257 /* ACK all PTherm IRQs */ 258 nvkm_wr32(device, 0x20100, 0xffffffff); 259 nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */ 260 261 return _nvkm_therm_fini(object, suspend); 262 } 263 264 struct nvkm_oclass 265 g84_therm_oclass = { 266 .handle = NV_SUBDEV(THERM, 0x84), 267 .ofuncs = &(struct nvkm_ofuncs) { 268 .ctor = g84_therm_ctor, 269 .dtor = _nvkm_therm_dtor, 270 .init = g84_therm_init, 271 .fini = g84_therm_fini, 272 }, 273 }; 274