nv40.c

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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"

static int
nv40_sensor_setup(struct nouveau_therm *therm)
{
    struct nouveau_device *device = nv_device(therm);

    /* enable ADC readout and disable the ALARM threshold */
    if (device->chipset >= 0x46) {
        nv_mask(therm, 0x15b8, 0x80000000, 0);
        nv_wr32(therm, 0x15b0, 0x80003fff);
        return nv_rd32(therm, 0x15b4) & 0x3fff;
    } else {
        nv_wr32(therm, 0x15b0, 0xff);
        return nv_rd32(therm, 0x15b4) & 0xff;
    }
}

static int
nv40_temp_get(struct nouveau_therm *therm)
{
    struct nouveau_therm_priv *priv = (void *)therm;
    struct nouveau_device *device = nv_device(therm);
    struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
    int core_temp;

    if (device->chipset >= 0x46) {
        nv_wr32(therm, 0x15b0, 0x80003fff);
        core_temp = nv_rd32(therm, 0x15b4) & 0x3fff;
    } else {
        nv_wr32(therm, 0x15b0, 0xff);
        core_temp = nv_rd32(therm, 0x15b4) & 0xff;
    }

    /* Setup the sensor if the temperature is 0 */
    if (core_temp == 0)
        core_temp = nv40_sensor_setup(therm);

    if (sensor->slope_div == 0)
        sensor->slope_div = 1;
    if (sensor->offset_den == 0)
        sensor->offset_den = 1;
    if (sensor->slope_mult < 1)
        sensor->slope_mult = 1;

    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;

    return core_temp;
}

int
nv40_fan_pwm_get(struct nouveau_therm *therm, int line, u32 *divs, u32 *duty)
{
    if (line == 2) {
        u32 reg = nv_rd32(therm, 0x0010f0);
        if (reg & 0x80000000) {
            *duty = (reg & 0x7fff0000) >> 16;
            *divs = (reg & 0x00007fff);
            return 0;
        }
    } else
    if (line == 9) {
        u32 reg = nv_rd32(therm, 0x0015f4);
        if (reg & 0x80000000) {
            *divs = nv_rd32(therm, 0x0015f8);
            *duty = (reg & 0x7fffffff);
            return 0;
        }
    } else {
        nv_error(therm, "unknown pwm ctrl for gpio %d\n", line);
        return -ENODEV;
    }

    return -EINVAL;
}

int
nv40_fan_pwm_set(struct nouveau_therm *therm, int line, u32 divs, u32 duty)
{
    if (line == 2) {
        nv_wr32(therm, 0x0010f0, 0x80000000 | (duty << 16) | divs);
    } else
    if (line == 9) {
        nv_wr32(therm, 0x0015f8, divs);
        nv_wr32(therm, 0x0015f4, duty | 0x80000000);
    } else {
        nv_error(therm, "unknown pwm ctrl for gpio %d\n", line);
        return -ENODEV;
    }

    return 0;
}

static int
nv40_therm_ctor(struct nouveau_object *parent,
           struct nouveau_object *engine,
           struct nouveau_oclass *oclass, void *data, u32 size,
           struct nouveau_object **pobject)
{
    struct nouveau_therm_priv *priv;
    struct nouveau_therm *therm;
    int ret;

    ret = nouveau_therm_create(parent, engine, oclass, &priv);
    *pobject = nv_object(priv);
    therm = (void *) priv;
    if (ret)
        return ret;

    nouveau_therm_ic_ctor(therm);
    nouveau_therm_sensor_ctor(therm);
    nouveau_therm_fan_ctor(therm);

    priv->fan.pwm_get = nv40_fan_pwm_get;
    priv->fan.pwm_set = nv40_fan_pwm_set;

    therm->temp_get = nv40_temp_get;
    therm->fan_get = nouveau_therm_fan_user_get;
    therm->fan_set = nouveau_therm_fan_user_set;
    therm->fan_sense = nouveau_therm_fan_sense;
    therm->attr_get = nouveau_therm_attr_get;
    therm->attr_set = nouveau_therm_attr_set;

    return 0;
}

struct nouveau_oclass
nv40_therm_oclass = {
    .handle = NV_SUBDEV(THERM, 0x40),
    .ofuncs = &(struct nouveau_ofuncs) {
        .ctor = nv40_therm_ctor,
        .dtor = _nouveau_therm_dtor,
        .init = nouveau_therm_init,
        .fini = nouveau_therm_fini,
    },
};