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// Copyright 2012 Google Inc. All Rights Reserved.
// Author: kedong@google.com (Ke Dong)
#ifndef BRUNO_PLATFORM_PERIPHERAL_FANCONTROL_H_
#define BRUNO_PLATFORM_PERIPHERAL_FANCONTROL_H_
#include "bruno/constructormagic.h"
#include "platform.h"
#include "mailbox.h"
namespace bruno_platform_peripheral {
class Platform;
#define DUTY_CYCLE_PWM_MIN_VALUE 0
#define DUTY_CYCLE_PWM_MAX_VALUE 100
typedef struct FanControlParams {
uint16_t temp_setpt;
uint16_t temp_max;
uint16_t temp_step;
uint16_t duty_cycle_min;
uint16_t duty_cycle_max;
uint16_t pwm_step;
uint16_t temp_overheat;
FanControlParams& operator = (const FanControlParams& param) {
temp_setpt = param.temp_setpt;
temp_max = param.temp_max;
temp_step = param.temp_step;
duty_cycle_min = param.duty_cycle_min;
duty_cycle_max = param.duty_cycle_max;
pwm_step = param.pwm_step;
temp_overheat = param.temp_overheat;
return *this;
}
}FanControlParams;
class FanControl : public Mailbox {
public:
enum StateType {
OFF,
VAR_SPEED,
FULL_SPEED
};
enum FanControlParamsTypes {
BRUNO_SOC = 0,
BRUNO_IS_HDD,
BRUNO_AUX1,
BRUNO_PARAMS_TYPES_MAX
};
static const unsigned int kPwmDefaultStartup;
static const unsigned int kPwmMinValue;
static const unsigned int kPwmMaxValue;
static const unsigned int kFanSpeedNotSpinning;
static const FanControlParams kGFMS100FanCtrlSocDefaults;
static const FanControlParams kGFMS100FanCtrlHddDefaults;
static const FanControlParams kGFRG200FanCtrlSocDefaults;
static const FanControlParams kGFRG210FanCtrlSocDefaults;
static const FanControlParams kGFRG210FanCtrlHddDefaults;
static const FanControlParams kGFRG250FanCtrlSocDefaults;
static const FanControlParams kGFRG250FanCtrlHddDefaults;
static const FanControlParams kGFRG250FanCtrlAux1Defaults;
static const FanControlParams kGFSC100FanCtrlSocDefaults;
static const FanControlParams kGFSC100FanCtrlHddDefaults;
static const FanControlParams kGFHD100FanCtrlSocDefaults;
static const FanControlParams kGFHD200FanCtrlSocDefaults;
static const FanControlParams kGFHD254FanCtrlSocDefaults;
static const FanControlParams kGFHD254FanCtrlAux1Defaults;
static const FanControlParams kGFLT110FanCtrlSocDefaults;
static const FanControlParams kGFLT300FanCtrlSocDefaults;
static const FanControlParams kGFCH100FanCtrlSocDefaults;
explicit FanControl(Platform *platform)
: state_(OFF),
auto_mode_(true),
duty_cycle_pwm_(kPwmMinValue),
duty_cycle_startup_(kPwmDefaultStartup),
period_(DUTY_CYCLE_PWM_MAX_VALUE-1),
pfan_ctrl_params_(NULL),
platform_(platform) {}
virtual ~FanControl();
bool Init(bool *gpio_mailbox_ready);
void Terminate(void);
bool DrivePwm(uint16_t duty_cycle);
bool AdjustSpeed(uint16_t soc_temp, uint16_t hdd_temp, uint16_t aux1_temp,
uint16_t fan_speed);
void GetHddTemperature(uint16_t *phdd_temp);
void GetOverheatTemperature(uint16_t *poverheat_temp);
private:
void InitParams(void);
std::string ExecCmd(char* cmd, std::string *pattern);
uint16_t __ComputeDutyCycle(uint16_t temp, uint16_t fan_speed,
const FanControlParams &params);
void ComputeDutyCycle(uint16_t soc_temp, uint16_t hdd_temp, uint16_t aux1_temp,
uint16_t fan_speed, uint16_t *new_duty_cycle_pwm);
void dbgUpdateFanControlParams(void);
bool dbgGetFanControlParamsFromParamsFile(uint8_t fc_idx);
StateType state_;
bool auto_mode_;
uint16_t duty_cycle_pwm_; /* current pwm duty cycle */
uint16_t duty_cycle_startup_; /* initial duty cycle */
/*
* Period = period_ + 1 where period_ is the register value in chip.
* (I have no idea why BRCM need it to be one short...), in this class, the
* period_ value is the value you will set in register. But the real Period is
* period_+1 mathmatically.
* To bump up the CPU with full duty cycle, the On register needs to be set as
* Period a.k.a period_+1.
*/
uint16_t period_;
/* Fan control parameters table
* idx BRUNO_SOC: depending upon GFMS100 (Bruno-IS) or GFHD100 (Thin Bruno);
* idx BRUNO_IS_HDD: use by HDD GFMS100
* */
FanControlParams *pfan_ctrl_params_;
Platform *platform_;
FanControlParams *get_hdd_fan_ctrl_parms();
FanControlParams *get_aux1_fan_ctrl_parms();
DISALLOW_COPY_AND_ASSIGN(FanControl);
};
} // namespace bruno_platform_peripheral
#endif // BRUNO_PLATFORM_PERIPHERAL_FANCONTROL_H_