loongson-smc.h

#ifndef _LOONGSON_SMC_H_
#define _LOONGSON_SMC_H_

struct smc_message {
	union {
		u32 value;
		struct {
			u32 arg : 24;
			u8  cmd : 7; /* Return 0x7f if command failed */
			u8  complete : 1;
		};
	};
};

/* Belows are commands in cmd registers */

#define CMD_GET_VERSION 0x1
/* Interface Version, input none, return version */

/* Features */
#define CMD_GET_FEATURES 0x2
/* Get features that SMC implemented, input index, output feature flags */
#define CMD_GET_ENABLED_FEATURES 0x3
/* Get currently enabled features, input index, output feature flags */
#define CMD_SET_ENABLED_FEATURES 0x4
/* Set features enabled state, input index and flags, output sucessfully enabled flags */
struct feature_args {
	u16 flags : 16;
	u8  index : 8;
};

#define FEATURE_INDEX_GENERAL 0x0
#define FEATURE_INDEX_ADVANCED 0x1

/* General Feature Flags */
#define FEATURE_FREQ_SCALE (1 << 0)
#define FEATURE_VOLTAGE_SCALE (1 << 1)
#define FEATURE_BOOST (1 << 2) /* Enable Boost means set PLL from 1.6GHz to 2GHz */
#define FEATURE_SENSORS (1 << 3) /* Sensors mounted on EC */
#define FEATURE_FAN_CONTROL (1 << 4)

/* Freqscale Related */
#define CMD_SET_DVFS_POLICY 0x5
/* Input CPUNum, output frequency, in MHz? */
#define CMD_GET_FREQ_LEVELS 0x6
/* Input none, output levels */
struct freq_level_args {
	u8 min_level : 8;
	u8 max_normal_level : 8;
	u8 max_boost_level : 8;
};

#define CMD_GET_FREQ_INFO 0x7
/* Input index and info, output info */
#define CMD_SET_FREQ_INFO 0x8
/* Input index and info, output none */

#define FREQ_INFO_INDEX_LEVEL_FREQ 0x0 /* Freq in MHz? For each shadow level */
#define FREQ_INFO_INDEX_CORE_FREQ 0x1 /* Freq in MHz? Current frequency of each core.*/

struct freq_info_args {
	u16 info : 16;
	u8  index : 8;
};

#define CMD_SET_CPU_LEVEL 0x9
/* Input cpu mask and level, output none */
/*
 * Note: This command return as completed only means
 * SMC already knows the request, does not means the
 * CPU freqency have changed. SMC should ensure constant
 * counter frequency unchanged.
 */
struct freq_level_setting_args {
	u16 cpumask : 16;
	u8  level : 8;
};

/* TEMP Sensors */
#define CMD_GET_SENSOR_NUM 0x10
/* Input none, output Number of sensors in u4 */

#define CMD_GET_SENSOR_STATUS 0x11
/* Input sensor_id and info_type, output info */
#define SENSOR_INFO_TYPE_TEMP 0x0
#define SENSOR_INFO_TYPE_VOLTAGE 0x1
#define SENSOR_INFO_TYPE_NAMESTR1 0x2
#define SENSOR_INFO_TYPE_NAMESTR2 0x3
#define SENSOR_INFO_TYPE_NAMESTR3 0x4
#define SENSOR_INFO_TYPE_NAMESTR4 0x5
#define SENSOR_INFO_TYPE_FLAGS 0xf
#define SENSOR_FLAG_TEMP (1 << 0)
#define SENSOR_FLAG_VOLTAGE (1 << 1)

struct sensor_info_args {
	union {
		u16 val;
		u16 volt; /* Voltage, in mV */
		s16 temp; /* Signed 16bit, in Celsius */
	};
	u8 info_type : 4;
	u8 sensor_id : 4;
};

/* Fan Control */
#define CMD_GET_FAN_NUM 0x12
/* Input none, output Number of fans in u4 */

#define CMD_GET_FAN_INFO 0x13
/* Input sensor_id and info_type, output info */
#define CMD_SET_FAN_INFO 0x14
/* Input sensor_id andinfo_type info, output none */
#define FAN_INFO_TYPE_INDEX_RPM 0x0 /* Return RPM, can not set */
#define FAN_INFO_TYPE_LEVEL 0x1 /* PWM Level, 0~255, only set with manual mode */
#define FAN_INFO_TYPE_FLAGS 0xf /* Determine Mode */
#define FAN_INFO_TYPE_NAMESTR1 0x2
#define FAN_INFO_TYPE_NAMESTR2 0x3
#define FAN_INFO_TYPE_NAMESTR3 0x4
#define FAN_INFO_TYPE_NAMESTR4 0x5
#define FAN_FLAG_AUTO (1 << 0)
#define FAN_FLAG_MANUAL (1 << 1)

struct fan_info_args {
	u16 val;
	u8  info_type : 4;
	u8  fan_id : 4;
};

#endif