subdev/therm/g84.c

0001 /*
0002  * Copyright 2012 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Ben Skeggs
0023  *      Martin Peres
0024  */
0025 #include "priv.h"
0026
0027 #include <subdev/fuse.h>
0028
0029 int
0030 g84_temp_get(struct nvkm_therm *therm)
0031 {
0032     struct nvkm_device *device = therm->subdev.device;
0033
0034     if (nvkm_fuse_read(device->fuse, 0x1a8) == 1)
0035         return nvkm_rd32(device, 0x20400);
0036     else
0037         return -ENODEV;
0038 }
0039
0040 void
0041 g84_sensor_setup(struct nvkm_therm *therm)
0042 {
0043     struct nvkm_device *device = therm->subdev.device;
0044
0045     /* enable temperature reading for cards with insane defaults */
0046     if (nvkm_fuse_read(device->fuse, 0x1a8) == 1) {
0047         nvkm_mask(device, 0x20008, 0x80008000, 0x80000000);
0048         nvkm_mask(device, 0x2000c, 0x80000003, 0x00000000);
0049         mdelay(20); /* wait for the temperature to stabilize */
0050     }
0051 }
0052
0053 static void
0054 g84_therm_program_alarms(struct nvkm_therm *therm)
0055 {
0056     struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
0057     struct nvkm_subdev *subdev = &therm->subdev;
0058     struct nvkm_device *device = subdev->device;
0059     unsigned long flags;
0060
0061     spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
0062
0063     /* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */
0064     nvkm_wr32(device, 0x20000, 0x000003ff);
0065
0066     /* shutdown: The computer should be shutdown when reached */
0067     nvkm_wr32(device, 0x20484, sensor->thrs_shutdown.hysteresis);
0068     nvkm_wr32(device, 0x20480, sensor->thrs_shutdown.temp);
0069
0070     /* THRS_1 : fan boost*/
0071     nvkm_wr32(device, 0x204c4, sensor->thrs_fan_boost.temp);
0072
0073     /* THRS_2 : critical */
0074     nvkm_wr32(device, 0x204c0, sensor->thrs_critical.temp);
0075
0076     /* THRS_4 : down clock */
0077     nvkm_wr32(device, 0x20414, sensor->thrs_down_clock.temp);
0078     spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
0079
0080     nvkm_debug(subdev,
0081            "Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
0082            sensor->thrs_fan_boost.temp,
0083            sensor->thrs_fan_boost.hysteresis,
0084            sensor->thrs_down_clock.temp,
0085            sensor->thrs_down_clock.hysteresis,
0086            sensor->thrs_critical.temp,
0087            sensor->thrs_critical.hysteresis,
0088            sensor->thrs_shutdown.temp,
0089            sensor->thrs_shutdown.hysteresis);
0090
0091 }
0092
0093 /* must be called with alarm_program_lock taken ! */
0094 static void
0095 g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm,
0096                    uint32_t thrs_reg, u8 status_bit,
0097                    const struct nvbios_therm_threshold *thrs,
0098                    enum nvkm_therm_thrs thrs_name)
0099 {
0100     struct nvkm_device *device = therm->subdev.device;
0101     enum nvkm_therm_thrs_direction direction;
0102     enum nvkm_therm_thrs_state prev_state, new_state;
0103     int temp, cur;
0104
0105     prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
0106     temp = nvkm_rd32(device, thrs_reg);
0107
0108     /* program the next threshold */
0109     if (temp == thrs->temp) {
0110         nvkm_wr32(device, thrs_reg, thrs->temp - thrs->hysteresis);
0111         new_state = NVKM_THERM_THRS_HIGHER;
0112     } else {
0113         nvkm_wr32(device, thrs_reg, thrs->temp);
0114         new_state = NVKM_THERM_THRS_LOWER;
0115     }
0116
0117     /* fix the state (in case someone reprogrammed the alarms) */
0118     cur = therm->func->temp_get(therm);
0119     if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp)
0120         new_state = NVKM_THERM_THRS_HIGHER;
0121     else if (new_state == NVKM_THERM_THRS_HIGHER &&
0122         cur < thrs->temp - thrs->hysteresis)
0123         new_state = NVKM_THERM_THRS_LOWER;
0124     nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
0125
0126     /* find the direction */
0127     if (prev_state < new_state)
0128         direction = NVKM_THERM_THRS_RISING;
0129     else if (prev_state > new_state)
0130         direction = NVKM_THERM_THRS_FALLING;
0131     else
0132         return;
0133
0134     /* advertise a change in direction */
0135     nvkm_therm_sensor_event(therm, thrs_name, direction);
0136 }
0137
0138 static void
0139 g84_therm_intr(struct nvkm_therm *therm)
0140 {
0141     struct nvkm_subdev *subdev = &therm->subdev;
0142     struct nvkm_device *device = subdev->device;
0143     struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
0144     unsigned long flags;
0145     uint32_t intr;
0146
0147     spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
0148
0149     intr = nvkm_rd32(device, 0x20100) & 0x3ff;
0150
0151     /* THRS_4: downclock */
0152     if (intr & 0x002) {
0153         g84_therm_threshold_hyst_emulation(therm, 0x20414, 24,
0154                            &sensor->thrs_down_clock,
0155                            NVKM_THERM_THRS_DOWNCLOCK);
0156         intr &= ~0x002;
0157     }
0158
0159     /* shutdown */
0160     if (intr & 0x004) {
0161         g84_therm_threshold_hyst_emulation(therm, 0x20480, 20,
0162                            &sensor->thrs_shutdown,
0163                            NVKM_THERM_THRS_SHUTDOWN);
0164         intr &= ~0x004;
0165     }
0166
0167     /* THRS_1 : fan boost */
0168     if (intr & 0x008) {
0169         g84_therm_threshold_hyst_emulation(therm, 0x204c4, 21,
0170                            &sensor->thrs_fan_boost,
0171                            NVKM_THERM_THRS_FANBOOST);
0172         intr &= ~0x008;
0173     }
0174
0175     /* THRS_2 : critical */
0176     if (intr & 0x010) {
0177         g84_therm_threshold_hyst_emulation(therm, 0x204c0, 22,
0178                            &sensor->thrs_critical,
0179                            NVKM_THERM_THRS_CRITICAL);
0180         intr &= ~0x010;
0181     }
0182
0183     if (intr)
0184         nvkm_error(subdev, "intr %08x\n", intr);
0185
0186     /* ACK everything */
0187     nvkm_wr32(device, 0x20100, 0xffffffff);
0188     nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
0189
0190     spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
0191 }
0192
0193 void
0194 g84_therm_fini(struct nvkm_therm *therm)
0195 {
0196     struct nvkm_device *device = therm->subdev.device;
0197
0198     /* Disable PTherm IRQs */
0199     nvkm_wr32(device, 0x20000, 0x00000000);
0200
0201     /* ACK all PTherm IRQs */
0202     nvkm_wr32(device, 0x20100, 0xffffffff);
0203     nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
0204 }
0205
0206 void
0207 g84_therm_init(struct nvkm_therm *therm)
0208 {
0209     g84_sensor_setup(therm);
0210 }
0211
0212 static const struct nvkm_therm_func
0213 g84_therm = {
0214     .init = g84_therm_init,
0215     .fini = g84_therm_fini,
0216     .intr = g84_therm_intr,
0217     .pwm_ctrl = nv50_fan_pwm_ctrl,
0218     .pwm_get = nv50_fan_pwm_get,
0219     .pwm_set = nv50_fan_pwm_set,
0220     .pwm_clock = nv50_fan_pwm_clock,
0221     .temp_get = g84_temp_get,
0222     .program_alarms = g84_therm_program_alarms,
0223 };
0224
0225 int
0226 g84_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
0227           struct nvkm_therm **ptherm)
0228 {
0229     struct nvkm_therm *therm;
0230     int ret;
0231
0232     ret = nvkm_therm_new_(&g84_therm, device, type, inst, &therm);
0233     *ptherm = therm;
0234     if (ret)
0235         return ret;
0236
0237     /* init the thresholds */
0238     nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_SHUTDOWN,
0239                              NVKM_THERM_THRS_LOWER);
0240     nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_FANBOOST,
0241                              NVKM_THERM_THRS_LOWER);
0242     nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_CRITICAL,
0243                              NVKM_THERM_THRS_LOWER);
0244     nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_DOWNCLOCK,
0245                              NVKM_THERM_THRS_LOWER);
0246     return 0;
0247 }