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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"
struct nv50_therm_priv {
struct nvkm_therm_priv base;
};
static int
pwm_info(struct nvkm_therm *therm, int *line, int *ctrl, int *indx)
{
if (*line == 0x04) {
*ctrl = 0x00e100;
*line = 4;
*indx = 0;
} else
if (*line == 0x09) {
*ctrl = 0x00e100;
*line = 9;
*indx = 1;
} else
if (*line == 0x10) {
*ctrl = 0x00e28c;
*line = 0;
*indx = 0;
} else {
nv_error(therm, "unknown pwm ctrl for gpio %d\n", *line);
return -ENODEV;
}
return 0;
}
int
nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
{
u32 data = enable ? 0x00000001 : 0x00000000;
int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
if (ret == 0)
nv_mask(therm, ctrl, 0x00010001 << line, data << line);
return ret;
}
int
nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
{
int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
if (ret)
return ret;
if (nv_rd32(therm, ctrl) & (1 << line)) {
*divs = nv_rd32(therm, 0x00e114 + (id * 8));
*duty = nv_rd32(therm, 0x00e118 + (id * 8));
return 0;
}
return -EINVAL;
}
int
nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
{
int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
if (ret)
return ret;
nv_wr32(therm, 0x00e114 + (id * 8), divs);
nv_wr32(therm, 0x00e118 + (id * 8), duty | 0x80000000);
return 0;
}
int
nv50_fan_pwm_clock(struct nvkm_therm *therm, int line)
{
int chipset = nv_device(therm)->chipset;
int crystal = nv_device(therm)->crystal;
int pwm_clock;
/* determine the PWM source clock */
if (chipset > 0x50 && chipset < 0x94) {
u8 pwm_div = nv_rd32(therm, 0x410c);
if (nv_rd32(therm, 0xc040) & 0x800000) {
/* Use the HOST clock (100 MHz)
* Where does this constant(2.4) comes from? */
pwm_clock = (100000000 >> pwm_div) * 10 / 24;
} else {
/* Where does this constant(20) comes from? */
pwm_clock = (crystal * 1000) >> pwm_div;
pwm_clock /= 20;
}
} else {
pwm_clock = (crystal * 1000) / 20;
}
return pwm_clock;
}
static void
nv50_sensor_setup(struct nvkm_therm *therm)
{
nv_mask(therm, 0x20010, 0x40000000, 0x0);
mdelay(20); /* wait for the temperature to stabilize */
}
static int
nv50_temp_get(struct nvkm_therm *therm)
{
struct nvkm_therm_priv *priv = (void *)therm;
struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
int core_temp;
core_temp = nv_rd32(therm, 0x20014) & 0x3fff;
/* if the slope or the offset is unset, do no use the sensor */
if (!sensor->slope_div || !sensor->slope_mult ||
!sensor->offset_num || !sensor->offset_den)
return -ENODEV;
core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
core_temp = core_temp + sensor->offset_num / sensor->offset_den;
core_temp = core_temp + sensor->offset_constant - 8;
/* reserve negative temperatures for errors */
if (core_temp < 0)
core_temp = 0;
return core_temp;
}
static int
nv50_therm_ctor(struct nvkm_object *parent,
struct nvkm_object *engine,
struct nvkm_oclass *oclass, void *data, u32 size,
struct nvkm_object **pobject)
{
struct nv50_therm_priv *priv;
int ret;
ret = nvkm_therm_create(parent, engine, oclass, &priv);
*pobject = nv_object(priv);
if (ret)
return ret;
priv->base.base.pwm_ctrl = nv50_fan_pwm_ctrl;
priv->base.base.pwm_get = nv50_fan_pwm_get;
priv->base.base.pwm_set = nv50_fan_pwm_set;
priv->base.base.pwm_clock = nv50_fan_pwm_clock;
priv->base.base.temp_get = nv50_temp_get;
priv->base.sensor.program_alarms = nvkm_therm_program_alarms_polling;
nv_subdev(priv)->intr = nv40_therm_intr;
return nvkm_therm_preinit(&priv->base.base);
}
static int
nv50_therm_init(struct nvkm_object *object)
{
struct nvkm_therm *therm = (void *)object;
nv50_sensor_setup(therm);
return _nvkm_therm_init(object);
}
struct nvkm_oclass
nv50_therm_oclass = {
.handle = NV_SUBDEV(THERM, 0x50),
.ofuncs = &(struct nvkm_ofuncs) {
.ctor = nv50_therm_ctor,
.dtor = _nvkm_therm_dtor,
.init = nv50_therm_init,
.fini = _nvkm_therm_fini,
},
};
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