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/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
* Martin Peres
*/
#include "priv.h"
#include <subdev/fuse.h>
int
g84_temp_get(struct nvkm_therm *therm)
{
struct nvkm_device *device = therm->subdev.device;
if (nvkm_fuse_read(device->fuse, 0x1a8) == 1)
return nvkm_rd32(device, 0x20400);
else
return -ENODEV;
}
void
g84_sensor_setup(struct nvkm_therm *therm)
{
struct nvkm_device *device = therm->subdev.device;
/* enable temperature reading for cards with insane defaults */
if (nvkm_fuse_read(device->fuse, 0x1a8) == 1) {
nvkm_mask(device, 0x20008, 0x80008000, 0x80000000);
nvkm_mask(device, 0x2000c, 0x80000003, 0x00000000);
mdelay(20); /* wait for the temperature to stabilize */
}
}
static void
g84_therm_program_alarms(struct nvkm_therm *therm)
{
struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
struct nvkm_subdev *subdev = &therm->subdev;
struct nvkm_device *device = subdev->device;
unsigned long flags;
spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
/* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */
nvkm_wr32(device, 0x20000, 0x000003ff);
/* shutdown: The computer should be shutdown when reached */
nvkm_wr32(device, 0x20484, sensor->thrs_shutdown.hysteresis);
nvkm_wr32(device, 0x20480, sensor->thrs_shutdown.temp);
/* THRS_1 : fan boost*/
nvkm_wr32(device, 0x204c4, sensor->thrs_fan_boost.temp);
/* THRS_2 : critical */
nvkm_wr32(device, 0x204c0, sensor->thrs_critical.temp);
/* THRS_4 : down clock */
nvkm_wr32(device, 0x20414, sensor->thrs_down_clock.temp);
spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
nvkm_debug(subdev,
"Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
sensor->thrs_fan_boost.temp,
sensor->thrs_fan_boost.hysteresis,
sensor->thrs_down_clock.temp,
sensor->thrs_down_clock.hysteresis,
sensor->thrs_critical.temp,
sensor->thrs_critical.hysteresis,
sensor->thrs_shutdown.temp,
sensor->thrs_shutdown.hysteresis);
}
/* must be called with alarm_program_lock taken ! */
static void
g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm,
uint32_t thrs_reg, u8 status_bit,
const struct nvbios_therm_threshold *thrs,
enum nvkm_therm_thrs thrs_name)
{
struct nvkm_device *device = therm->subdev.device;
enum nvkm_therm_thrs_direction direction;
enum nvkm_therm_thrs_state prev_state, new_state;
int temp, cur;
prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
temp = nvkm_rd32(device, thrs_reg);
/* program the next threshold */
if (temp == thrs->temp) {
nvkm_wr32(device, thrs_reg, thrs->temp - thrs->hysteresis);
new_state = NVKM_THERM_THRS_HIGHER;
} else {
nvkm_wr32(device, thrs_reg, thrs->temp);
new_state = NVKM_THERM_THRS_LOWER;
}
/* fix the state (in case someone reprogrammed the alarms) */
cur = therm->func->temp_get(therm);
if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp)
new_state = NVKM_THERM_THRS_HIGHER;
else if (new_state == NVKM_THERM_THRS_HIGHER &&
cur < thrs->temp - thrs->hysteresis)
new_state = NVKM_THERM_THRS_LOWER;
nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
/* find the direction */
if (prev_state < new_state)
direction = NVKM_THERM_THRS_RISING;
else if (prev_state > new_state)
direction = NVKM_THERM_THRS_FALLING;
else
return;
/* advertise a change in direction */
nvkm_therm_sensor_event(therm, thrs_name, direction);
}
static void
g84_therm_intr(struct nvkm_therm *therm)
{
struct nvkm_subdev *subdev = &therm->subdev;
struct nvkm_device *device = subdev->device;
struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
unsigned long flags;
uint32_t intr;
spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
intr = nvkm_rd32(device, 0x20100) & 0x3ff;
/* THRS_4: downclock */
if (intr & 0x002) {
g84_therm_threshold_hyst_emulation(therm, 0x20414, 24,
&sensor->thrs_down_clock,
NVKM_THERM_THRS_DOWNCLOCK);
intr &= ~0x002;
}
/* shutdown */
if (intr & 0x004) {
g84_therm_threshold_hyst_emulation(therm, 0x20480, 20,
&sensor->thrs_shutdown,
NVKM_THERM_THRS_SHUTDOWN);
intr &= ~0x004;
}
/* THRS_1 : fan boost */
if (intr & 0x008) {
g84_therm_threshold_hyst_emulation(therm, 0x204c4, 21,
&sensor->thrs_fan_boost,
NVKM_THERM_THRS_FANBOOST);
intr &= ~0x008;
}
/* THRS_2 : critical */
if (intr & 0x010) {
g84_therm_threshold_hyst_emulation(therm, 0x204c0, 22,
&sensor->thrs_critical,
NVKM_THERM_THRS_CRITICAL);
intr &= ~0x010;
}
if (intr)
nvkm_error(subdev, "intr %08x\n", intr);
/* ACK everything */
nvkm_wr32(device, 0x20100, 0xffffffff);
nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
}
void
g84_therm_fini(struct nvkm_therm *therm)
{
struct nvkm_device *device = therm->subdev.device;
/* Disable PTherm IRQs */
nvkm_wr32(device, 0x20000, 0x00000000);
/* ACK all PTherm IRQs */
nvkm_wr32(device, 0x20100, 0xffffffff);
nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
}
void
g84_therm_init(struct nvkm_therm *therm)
{
g84_sensor_setup(therm);
}
static const struct nvkm_therm_func
g84_therm = {
.init = g84_therm_init,
.fini = g84_therm_fini,
.intr = g84_therm_intr,
.pwm_ctrl = nv50_fan_pwm_ctrl,
.pwm_get = nv50_fan_pwm_get,
.pwm_set = nv50_fan_pwm_set,
.pwm_clock = nv50_fan_pwm_clock,
.temp_get = g84_temp_get,
.program_alarms = g84_therm_program_alarms,
};
int
g84_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_therm **ptherm)
{
struct nvkm_therm *therm;
int ret;
ret = nvkm_therm_new_(&g84_therm, device, type, inst, &therm);
*ptherm = therm;
if (ret)
return ret;
/* init the thresholds */
nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_SHUTDOWN,
NVKM_THERM_THRS_LOWER);
nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_FANBOOST,
NVKM_THERM_THRS_LOWER);
nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_CRITICAL,
NVKM_THERM_THRS_LOWER);
nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_DOWNCLOCK,
NVKM_THERM_THRS_LOWER);
return 0;
}
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