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/*
* This file is part of the coreboot project.
*
* Copyright 2017 secunet Security Networks AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef DRIVERS_I2C_LM96000_CHIP_H
#define DRIVERS_I2C_LM96000_CHIP_H
#include <stdint.h>
#define LM96000_VIN_CNT 5
#define LM96000_TEMP_IN_CNT 3
#define LM96000_FAN_IN_CNT 4
#define LM96000_PWM_CTL_CNT 3
#define LM96000_TEMP_ZONE_CNT 3
enum lm96000_vin {
LM96000_2_5V = 0,
LM96000_VCCP = 1,
LM96000_3_3V = 2,
LM96000_5V = 3,
LM96000_12V = 4,
};
enum lm96000_fan_mode {
/* Bit 7 merely signifies that the mode is set, so we
can map the lower bits directly to register values. */
LM96000_FAN_IGNORE = 0x00,
LM96000_FAN_ZONE_1_AUTO = 0x80,
LM96000_FAN_ZONE_2_AUTO = 0x81,
LM96000_FAN_ZONE_3_AUTO = 0x82,
LM96000_FAN_ALWAYS_FULL = 0x83,
LM96000_FAN_DISABLED = 0x84,
LM96000_FAN_HOTTEST_23 = 0x85,
LM96000_FAN_HOTTEST_123 = 0x86,
LM96000_FAN_MANUAL = 0x87,
};
enum lm96000_pwm_freq {
LM96000_PWM_10HZ = 0,
LM96000_PWM_15HZ = 1,
LM96000_PWM_23HZ = 2,
LM96000_PWM_30HZ = 3,
LM96000_PWM_38HZ = 4,
LM96000_PWM_47HZ = 5,
LM96000_PWM_61HZ = 6,
LM96000_PWM_94HZ = 7,
LM96000_PWM_22_5KHZ = 8,
LM96000_PWM_24_0KHZ = 9,
LM96000_PWM_25_7KHZ = 10,
LM96000_PWM_27_7KHZ = 12,
LM96000_PWM_30_0KHZ = 14,
};
enum lm96000_tach_mode {
/* 0 will be used for kHz frequencies */
LM96000_TACH_MODE_1 = 1, /* use if TACHx isn't used with PWMx */
LM96000_TACH_MODE_2 = 2, /* use either 2 or 3 if TACHx matches PWMx */
LM96000_TACH_MODE_3 = 3,
};
enum lm96000_spinup_time {
LM96000_SPINUP_0MS = 0,
LM96000_SPINUP_100MS = 1,
LM96000_SPINUP_250MS = 2,
LM96000_SPINUP_400MS = 3,
LM96000_SPINUP_700MS = 4,
LM96000_SPINUP_1000MS = 5,
LM96000_SPINUP_2000MS = 6,
LM96000_SPINUP_4000MS = 7,
};
struct lm96000_fan_config {
enum lm96000_fan_mode mode;
int invert; /* invert PWM signal */
enum lm96000_spinup_time spinup;
enum lm96000_pwm_freq freq;
enum lm96000_tach_mode tach;
union {
u8 duty_cycle; /* duty cycle in manual mode */
u8 min_duty; /* minimum duty cycle */
};
};
struct lm96000_temp_zone {
u8 low_temp; /* temperature for min. duty cycle (in °C) */
u8 target_temp; /* temperature for 100% duty cycle (in °C) */
u8 panic_temp; /* temperature for 100% duty cycle on all fans */
/* This is tied to the zone in the implementation I tested
with. (Datasheet clearly states the opposite, that this
is tied to each PWM output so YMMV.) */
enum {
/* turn fan off below `low_temp - hysteresis` */
LM96000_LOW_TEMP_OFF = 0,
/* keep PWM at mininum duty cycle */
LM96000_LOW_TEMP_MIN = 1,
} min_off;
u8 hysteresis;
};
/* Implements only those parts currently used by coreboot mainboards. */
struct drivers_i2c_lm96000_config {
struct {
u16 low; /* in mV */
u16 high;
} vin[LM96000_VIN_CNT];
struct {
signed char low; /* in °C */
signed char high;
} temp_in[LM96000_TEMP_IN_CNT];
struct {
u16 low; /* in RPM */
} fan_in[LM96000_FAN_IN_CNT];
struct lm96000_fan_config fan[LM96000_PWM_CTL_CNT];
struct lm96000_temp_zone zone[LM96000_TEMP_ZONE_CNT];
};
#endif /* DRIVERS_I2C_LM96000_CHIP_H */
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