/*
 * Copyright 2016 Advanced Micro Devices, 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.
 *
 */

#include <asm/div64.h>
#include "smu7_thermal.h"
#include "smu7_hwmgr.h"
#include "smu7_common.h"

int smu7_fan_ctrl_get_fan_speed_info(struct pp_hwmgr *hwmgr,
                struct phm_fan_speed_info *fan_speed_info)
{
        if (hwmgr->thermal_controller.fanInfo.bNoFan)
                return -ENODEV;

        fan_speed_info->supports_percent_read = true;
        fan_speed_info->supports_percent_write = true;
        fan_speed_info->min_percent = 0;
        fan_speed_info->max_percent = 100;

        if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM) &&
            hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution) {
                fan_speed_info->supports_rpm_read = true;
                fan_speed_info->supports_rpm_write = true;
                fan_speed_info->min_rpm = hwmgr->thermal_controller.fanInfo.ulMinRPM;
                fan_speed_info->max_rpm = hwmgr->thermal_controller.fanInfo.ulMaxRPM;
        } else {
                fan_speed_info->min_rpm = 0;
                fan_speed_info->max_rpm = 0;
        }

        return 0;
}

int smu7_fan_ctrl_get_fan_speed_pwm(struct pp_hwmgr *hwmgr,
                uint32_t *speed)
{
        uint32_t duty100;
        uint32_t duty;
        uint64_t tmp64;

        if (hwmgr->thermal_controller.fanInfo.bNoFan)
                return -ENODEV;

        duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_FDO_CTRL1, FMAX_DUTY100);
        duty = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_STATUS, FDO_PWM_DUTY);

        if (duty100 == 0)
                return -EINVAL;


        tmp64 = (uint64_t)duty * 255;
        do_div(tmp64, duty100);
        *speed = min_t(uint32_t, tmp64, 255);

        return 0;
}

int smu7_fan_ctrl_get_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t *speed)
{
        uint32_t tach_period;
        uint32_t crystal_clock_freq;

        if (hwmgr->thermal_controller.fanInfo.bNoFan ||
            !hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
                return -ENODEV;

        tach_period = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_TACH_STATUS, TACH_PERIOD);

        if (tach_period == 0)
                return -EINVAL;

        crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);

        *speed = 60 * crystal_clock_freq * 10000 / tach_period;

        return 0;
}

/**
 * smu7_fan_ctrl_set_static_mode - Set Fan Speed Control to static mode, so that the user can decide what speed to use.
 * @hwmgr:  the address of the powerplay hardware manager.
 * @mode:   the fan control mode, 0 default, 1 by percent, 5, by RPM
 * Exception: Should always succeed.
 */
int smu7_fan_ctrl_set_static_mode(struct pp_hwmgr *hwmgr, uint32_t mode)
{
        if (hwmgr->fan_ctrl_is_in_default_mode) {
                hwmgr->fan_ctrl_default_mode =
                                PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                                                CG_FDO_CTRL2, FDO_PWM_MODE);
                hwmgr->tmin =
                                PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                                                CG_FDO_CTRL2, TMIN);
                hwmgr->fan_ctrl_is_in_default_mode = false;
        }

        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_FDO_CTRL2, TMIN, 0);
        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_FDO_CTRL2, FDO_PWM_MODE, mode);

        return 0;
}

/**
 * smu7_fan_ctrl_set_default_mode - Reset Fan Speed Control to default mode.
 * @hwmgr:  the address of the powerplay hardware manager.
 * Exception: Should always succeed.
 */
int smu7_fan_ctrl_set_default_mode(struct pp_hwmgr *hwmgr)
{
        if (!hwmgr->fan_ctrl_is_in_default_mode) {
                PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                                CG_FDO_CTRL2, FDO_PWM_MODE, hwmgr->fan_ctrl_default_mode);
                PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                                CG_FDO_CTRL2, TMIN, hwmgr->tmin);
                hwmgr->fan_ctrl_is_in_default_mode = true;
        }

        return 0;
}

int smu7_fan_ctrl_start_smc_fan_control(struct pp_hwmgr *hwmgr)
{
        int result;

        if (PP_CAP(PHM_PlatformCaps_ODFuzzyFanControlSupport)) {
                result = smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_StartFanControl,
                                        FAN_CONTROL_FUZZY, NULL);

                if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM))
                        hwmgr->hwmgr_func->set_max_fan_rpm_output(hwmgr,
                                        hwmgr->thermal_controller.
                                        advanceFanControlParameters.usMaxFanRPM);
                else
                        hwmgr->hwmgr_func->set_max_fan_pwm_output(hwmgr,
                                        hwmgr->thermal_controller.
                                        advanceFanControlParameters.usMaxFanPWM);

        } else {
                result = smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_StartFanControl,
                                        FAN_CONTROL_TABLE, NULL);
        }

        if (!result && hwmgr->thermal_controller.
                        advanceFanControlParameters.ucTargetTemperature)
                result = smum_send_msg_to_smc_with_parameter(hwmgr,
                                PPSMC_MSG_SetFanTemperatureTarget,
                                hwmgr->thermal_controller.
                                advanceFanControlParameters.ucTargetTemperature,
                                NULL);

        if (!result &&
            (hwmgr->chip_id == CHIP_POLARIS10 ||
            hwmgr->chip_id == CHIP_POLARIS11 ||
            hwmgr->chip_id == CHIP_POLARIS12) &&
            hwmgr->thermal_controller.advanceFanControlParameters.ucEnableZeroRPM &&
            !PP_CAP(PHM_PlatformCaps_customThermalManagement))
                result = smum_send_msg_to_smc(hwmgr,
                                PPSMC_MSG_EnableZeroRpm,
                                NULL);

        hwmgr->fan_ctrl_enabled = true;

        return result;
}


int smu7_fan_ctrl_stop_smc_fan_control(struct pp_hwmgr *hwmgr)
{
        hwmgr->fan_ctrl_enabled = false;
        return smum_send_msg_to_smc(hwmgr, PPSMC_StopFanControl, NULL);
}

/**
 * smu7_fan_ctrl_set_fan_speed_pwm - Set Fan Speed in PWM.
 * @hwmgr: the address of the powerplay hardware manager.
 * @speed: is the pwm value (0 - 255) to be set.
 */
int smu7_fan_ctrl_set_fan_speed_pwm(struct pp_hwmgr *hwmgr,
                uint32_t speed)
{
        uint32_t duty100;
        uint32_t duty;
        uint64_t tmp64;

        if (hwmgr->thermal_controller.fanInfo.bNoFan)
                return 0;

        speed = min_t(uint32_t, speed, 255);

        if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
                smu7_fan_ctrl_stop_smc_fan_control(hwmgr);

        duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_FDO_CTRL1, FMAX_DUTY100);

        if (duty100 == 0)
                return -EINVAL;

        tmp64 = (uint64_t)speed * duty100;
        do_div(tmp64, 255);
        duty = (uint32_t)tmp64;

        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_FDO_CTRL0, FDO_STATIC_DUTY, duty);

        return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
}

/**
* smu7_fan_ctrl_reset_fan_speed_to_default - Reset Fan Speed to default.
* @hwmgr:  the address of the powerplay hardware manager.
* Exception: Always succeeds.
*/
int smu7_fan_ctrl_reset_fan_speed_to_default(struct pp_hwmgr *hwmgr)
{
        int result;

        if (hwmgr->thermal_controller.fanInfo.bNoFan)
                return 0;

        if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
                result = smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
                if (!result)
                        result = smu7_fan_ctrl_start_smc_fan_control(hwmgr);
        } else
                result = smu7_fan_ctrl_set_default_mode(hwmgr);

        return result;
}

/**
 * smu7_fan_ctrl_set_fan_speed_rpm - Set Fan Speed in RPM.
 * @hwmgr: the address of the powerplay hardware manager.
 * @speed: is the percentage value (min - max) to be set.
 * Exception: Fails is the speed not lie between min and max.
 */
int smu7_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed)
{
        uint32_t tach_period;
        uint32_t crystal_clock_freq;

        if (hwmgr->thermal_controller.fanInfo.bNoFan ||
                        (hwmgr->thermal_controller.fanInfo.
                        ucTachometerPulsesPerRevolution == 0) ||
                        (!speed || speed > UINT_MAX/8) ||
                        (speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) ||
                        (speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM))
                return -EINVAL;

        if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
                smu7_fan_ctrl_stop_smc_fan_control(hwmgr);

        crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);

        tach_period = 60 * crystal_clock_freq * 10000 / (8 * speed);

        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                                CG_TACH_CTRL, TARGET_PERIOD, tach_period);

        return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC_RPM);
}

/**
 * smu7_thermal_get_temperature - Reads the remote temperature from the SIslands thermal controller.
 *
 * @hwmgr: The address of the hardware manager.
 */
int smu7_thermal_get_temperature(struct pp_hwmgr *hwmgr)
{
        int temp;

        temp = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_MULT_THERMAL_STATUS, CTF_TEMP);

        /* Bit 9 means the reading is lower than the lowest usable value. */
        if (temp & 0x200)
                temp = SMU7_THERMAL_MAXIMUM_TEMP_READING;
        else
                temp = temp & 0x1ff;

        temp *= PP_TEMPERATURE_UNITS_PER_CENTIGRADES;

        return temp;
}

/**
 * smu7_thermal_set_temperature_range - Set the requested temperature range for high and low alert signals
 *
 * @hwmgr: The address of the hardware manager.
 * @low_temp: Temperature to be programmed for high alert signals
 * @high_temp: Temperature to be programmed for low alert signals
 * Exception: PP_Result_BadInput if the input data is not valid.
 */
static int smu7_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
                int low_temp, int high_temp)
{
        int low = SMU7_THERMAL_MINIMUM_ALERT_TEMP *
                        PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
        int high = SMU7_THERMAL_MAXIMUM_ALERT_TEMP *
                        PP_TEMPERATURE_UNITS_PER_CENTIGRADES;

        if (low < low_temp)
                low = low_temp;
        if (high > high_temp)
                high = high_temp;

        if (low > high)
                return -EINVAL;

        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_INT, DIG_THERM_INTH,
                        (high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_INT, DIG_THERM_INTL,
                        (low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_CTRL, DIG_THERM_DPM,
                        (high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));

        return 0;
}

/**
 * smu7_thermal_initialize - Programs thermal controller one-time setting registers
 *
 * @hwmgr: The address of the hardware manager.
 */
static int smu7_thermal_initialize(struct pp_hwmgr *hwmgr)
{
        if (hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
                PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                                CG_TACH_CTRL, EDGE_PER_REV,
                                hwmgr->thermal_controller.fanInfo.
                                ucTachometerPulsesPerRevolution - 1);

        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_FDO_CTRL2, TACH_PWM_RESP_RATE, 0x28);

        return 0;
}

/**
 * smu7_thermal_enable_alert - Enable thermal alerts on the RV770 thermal controller.
 *
 * @hwmgr: The address of the hardware manager.
 */
static void smu7_thermal_enable_alert(struct pp_hwmgr *hwmgr)
{
        uint32_t alert;

        alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_INT, THERM_INT_MASK);
        alert &= ~(SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_INT, THERM_INT_MASK, alert);

        /* send message to SMU to enable internal thermal interrupts */
        smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Enable, NULL);
}

/**
 * smu7_thermal_disable_alert - Disable thermal alerts on the RV770 thermal controller.
 * @hwmgr: The address of the hardware manager.
 */
int smu7_thermal_disable_alert(struct pp_hwmgr *hwmgr)
{
        uint32_t alert;

        alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_INT, THERM_INT_MASK);
        alert |= (SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
        PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
                        CG_THERMAL_INT, THERM_INT_MASK, alert);

        /* send message to SMU to disable internal thermal interrupts */
        return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Disable, NULL);
}

/**
 * smu7_thermal_stop_thermal_controller - Uninitialize the thermal controller.
 * Currently just disables alerts.
 * @hwmgr: The address of the hardware manager.
 */
int smu7_thermal_stop_thermal_controller(struct pp_hwmgr *hwmgr)
{
        int result = smu7_thermal_disable_alert(hwmgr);

        if (!hwmgr->thermal_controller.fanInfo.bNoFan)
                smu7_fan_ctrl_set_default_mode(hwmgr);

        return result;
}

/**
 * smu7_thermal_start_smc_fan_control - Start the fan control on the SMC.
 * @hwmgr:  the address of the powerplay hardware manager.
 * Return:   result from set temperature range routine
 */
static int smu7_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr)
{
/* If the fantable setup has failed we could have disabled
 * PHM_PlatformCaps_MicrocodeFanControl even after
 * this function was included in the table.
 * Make sure that we still think controlling the fan is OK.
*/
        if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
                smu7_fan_ctrl_start_smc_fan_control(hwmgr);
                smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
        }

        return 0;
}

int smu7_start_thermal_controller(struct pp_hwmgr *hwmgr,
                                struct PP_TemperatureRange *range)
{
        int ret = 0;

        if (range == NULL)
                return -EINVAL;

        smu7_thermal_initialize(hwmgr);
        ret = smu7_thermal_set_temperature_range(hwmgr, range->min, range->max);
        if (ret)
                return -EINVAL;
        smu7_thermal_enable_alert(hwmgr);
        ret = smum_thermal_avfs_enable(hwmgr);
        if (ret)
                return -EINVAL;

/* We should restrict performance levels to low before we halt the SMC.
 * On the other hand we are still in boot state when we do this
 * so it would be pointless.
 * If this assumption changes we have to revisit this table.
 */
        smum_thermal_setup_fan_table(hwmgr);
        smu7_thermal_start_smc_fan_control(hwmgr);
        return 0;
}



int smu7_thermal_ctrl_uninitialize_thermal_controller(struct pp_hwmgr *hwmgr)
{
        if (!hwmgr->thermal_controller.fanInfo.bNoFan)
                smu7_fan_ctrl_set_default_mode(hwmgr);
        return 0;
}