max1720x_battery.h - kernel/google-modules/bms - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Google Battery Management System
  *
  * Copyright 2020 Google, LLC
  *
  * 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; either version 2 of the License, or
  * (at your option) any later version.
  *
  * 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 MAX1720X_BATTERY_H_
 #define MAX1720X_BATTERY_H_

 #include <linux/device.h>
 #include <linux/regmap.h>
 #include <linux/math64.h>

 #define MAX1720X_GAUGE_TYPE	0
 #define MAX1730X_GAUGE_TYPE	1
 #define MAX_M5_GAUGE_TYPE	2

 #define EEPROM_SN	0
 #define MAX1720X_SN	1

 /* multiply by 2 when task period = 351 ms */
 static inline int reg_to_micro_amp_h(s16 val, u16 rsense, int lsb)
 {
 	/* LSB: 5.0μVh/RSENSE ; Rsense LSB is 10μΩ */
 	return div_s64((s64) val * 500000, rsense) * lsb;
 }

 /* divide by 2 when task period = 351 ms */
 static inline s16 micro_amp_h_to_reg(int val, u16 rsense, int lsb)
 {
 	/* LSB: 5.0μVh/RSENSE ; Rsense LSB is 10μΩ */
 	return div_s64((s64)(val / lsb) * rsense, 500000);
 }

 static inline int reg_to_micro_volt(u16 val)
 {
 	/* LSB: 0.078125mV */
 	return div_u64((u64) val * 78125, 1000);
 }

 enum max17x0x_reg_tags {
 	MAX17X0X_TAG_avgc,
 	MAX17X0X_TAG_cnfg,
 	MAX17X0X_TAG_mmdv,
 	MAX17X0X_TAG_vcel,
 	MAX17X0X_TAG_temp,
 	MAX17X0X_TAG_curr,
 	MAX17X0X_TAG_mcap,
 	MAX17X0X_TAG_avgr,
 	MAX17X0X_TAG_vfsoc,
 	MAX17X0X_TAG_vfocv,

 	MAX17X0X_TAG_BCNT,
 	MAX17X0X_TAG_SNUM,
 	MAX17X0X_TAG_HSTY,
 	MAX17X0X_TAG_BCEA,
 	MAX17X0X_TAG_rset,
 	MAX17X0X_TAG_BRES,
 };

 enum max17x0x_reg_types {
 	GBMS_ATOM_TYPE_MAP = 0,
 	GBMS_ATOM_TYPE_REG = 1,
 	GBMS_ATOM_TYPE_ZONE = 2,
 	GBMS_ATOM_TYPE_SET = 3,
 };

 /* this is a map for u16 registers */
 #define ATOM_INIT_MAP(...)			\
 	.type = GBMS_ATOM_TYPE_MAP,		\
 	.size = 2 * sizeof((u8[]){__VA_ARGS__}),\
 	.map = (u8[]){__VA_ARGS__}

 #define ATOM_INIT_REG16(r)		\
 	.type = GBMS_ATOM_TYPE_REG,	\
 	.size = 2,			\
 	.reg = r

 #define ATOM_INIT_ZONE(start, sz)	\
 	.type = GBMS_ATOM_TYPE_ZONE,	\
 	.size = sz,			\
 	.base = start

 /* a set has no storage and cannot be used in load/store */
 #define ATOM_INIT_SET(...)		\
 	.type = GBMS_ATOM_TYPE_SET,	\
 	.size = 0,			\
 	.map = (u8[]){__VA_ARGS__}

 #define ATOM_INIT_SET16(...)		\
 	.type = GBMS_ATOM_TYPE_SET,	\
 	.size = 0,			\
 	.map16 = (u16[]){__VA_ARGS__}

 struct max17x0x_reg {
 	int type;
 	int size;
 	union {
 		unsigned int base;
 		unsigned int reg;
 		const u16 *map16;
 		const u8 *map;
 	};
 };

 struct max17x0x_cache_data {
 	struct max17x0x_reg atom;
 	u16 *cache_data;
 };

 #define NB_REGMAP_MAX 256

 struct max17x0x_reglog {
 	u16 data[NB_REGMAP_MAX];
 	DECLARE_BITMAP(valid, NB_REGMAP_MAX);
 	int errors[NB_REGMAP_MAX];
 	int count[NB_REGMAP_MAX];
 };

 struct max17x0x_regtags {
 	const struct max17x0x_reg *map;
 	unsigned int max;
 };

 struct max17x0x_regmap {
 	struct regmap *regmap;
 	struct max17x0x_regtags regtags;
 	struct max17x0x_reglog *reglog;
 };

 int max1720x_get_capacity(struct i2c_client *client, int *iic_raw);
 int max1720x_get_voltage_now(struct i2c_client *client, int *iic_raw);
 int max17x0x_sw_reset(struct i2c_client *client);

 /* */
 #ifdef CONFIG_MAX1720X_REGLOG_LOG
 static inline void max17x0x_reglog_log(struct max17x0x_reglog *reglog,
 				       unsigned int reg, u16 data, int rtn)
 {
 	if (!reglog)
 		return;

 	reglog->count[reg] += 1;
 	if (rtn != 0) {
 		reglog->errors[reg] += 1;
 	} else {
 		__set_bit(reg, reglog->valid);
 		reglog->data[reg] = data;
 	}

 }

 #else
 static inline void max17x0x_reglog_log(struct max17x0x_reglog *reglog,
 				       unsigned int reg, u16 data, int rtn)
 {

 }
 #endif

 static inline int max17x0x_regmap_read(const struct max17x0x_regmap *map,
 				       unsigned int reg,
 				       u16 *val,
 				       const char *name)
 {
 	int rtn;
 	unsigned int tmp;

 	if (!map->regmap) {
 		pr_err("Failed to read %s, no regmap\n", name);
 		return -EIO;
 	}

 	rtn = regmap_read(map->regmap, reg, &tmp);
 	if (rtn)
 		pr_err("Failed to read %s\n", name);
 	else
 		*val = tmp;

 	return rtn;
 }

 #define REGMAP_READ(regmap, what, dst) \
 	max17x0x_regmap_read(regmap, what, dst, #what)

 static inline int max17x0x_regmap_write(const struct max17x0x_regmap *map,
 				       unsigned int reg,
 				       u16 data,
 				       const char *name)
 {
 	int rtn;

 	if (!map->regmap) {
 		pr_err("Failed to write %s, no regmap\n", name);
 		return -EIO;
 	}

 	rtn = regmap_write(map->regmap, reg, data);
 	if (rtn)
 		pr_err("Failed to write %s\n", name);

 	max17x0x_reglog_log(map->reglog, reg, data, rtn);

 	return rtn;
 }

 #define REGMAP_WRITE(regmap, what, value) \
 	max17x0x_regmap_write(regmap, what, value, #what)

 #define WAIT_VERIFY	(10 * USEC_PER_MSEC) /* 10 msec */
 static inline int max1720x_regmap_writeverify(const struct max17x0x_regmap *map,
 					unsigned int reg,
 					u16 data,
 					const char *name)
 {
 	int tmp, ret, retries;

 	if (!map->regmap) {
 		pr_err("Failed to write %s, no regmap\n", name);
 		return -EINVAL;
 	}

 	for (retries = 3; retries > 0; retries--) {
 		ret = regmap_write(map->regmap, reg, data);
 		if (ret < 0)
 			continue;

 		usleep_range(WAIT_VERIFY, WAIT_VERIFY + 100);

 		ret = regmap_read(map->regmap, reg, &tmp);
 		if (ret < 0)
 			continue;

 		if (tmp == data)
 			return 0;
 	}

 	return -EIO;
 }

 #define REGMAP_WRITE_VERIFY(regmap, what, value) \
 	max1720x_regmap_writeverify(regmap, what, value, #what)

 enum max1720x_drift_algo_version {
 	MAX1720X_DA_VER_NONE = -1,	/* MW RC2 */
 	MAX1720X_DA_VER_ORIG = 0,	/* MW A0, max1720x */
 	MAX1720X_DA_VER_MWA1 = 1,	/* MW A1 RC1 */
 	MAX1720X_DA_VER_MWA2 = 2,	/* MW A2 RC1 */
 };

 #define max1720x_check_drift_enabled(dd) \
 		((dd)->algo_ver >= MAX1720X_DA_VER_ORIG)
 #define max1720x_check_drift_on_soc(dd) \
 		((dd)->algo_ver == MAX1720X_DA_VER_MWA1)
 #define max1720x_check_drift_delay(dd) \
 		((dd)->algo_ver == MAX1720X_DA_VER_MWA1 ? 351 : 0)

 /* fix to capacity estimation */
 struct max1720x_drift_data {
 	u16 rsense;
 	enum max1720x_drift_algo_version algo_ver;

 	u16 design_capacity;
 	int cycle_band;
 	int cycle_fade;
 	int cycle_stable;
 	int ini_rcomp0;
 	int ini_tempco;
 	int ini_filtercfg;
 };

 struct max1720x_dyn_filtercfg {
 	s32 temp;
 	s32 hysteresis;
 	u16 curr_val;
 	u16 default_val;
 	u16 adjust_val;
 	struct mutex lock;
 };

 extern int max1720x_fixup_comp(struct max1720x_drift_data *ddata,
 			       struct max17x0x_regmap *map,
 			       int plugged);
 extern int max1720x_fixup_dxacc(struct max1720x_drift_data *ddata,
 				struct max17x0x_regmap *map,
 				int cycle_count,
 				int plugged,
 				int lsb);

 #endif
	/* SPDX-License-Identifier: GPL-2.0 */
	/*
	* Google Battery Management System
	*
	* Copyright 2020 Google, LLC
	*
	* 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; either version 2 of the License, or
	* (at your option) any later version.
	*
	* 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 MAX1720X_BATTERY_H_
	#define MAX1720X_BATTERY_H_

	#include <linux/device.h>
	#include <linux/regmap.h>
	#include <linux/math64.h>

	#define MAX1720X_GAUGE_TYPE 0
	#define MAX1730X_GAUGE_TYPE 1
	#define MAX_M5_GAUGE_TYPE 2

	#define EEPROM_SN 0
	#define MAX1720X_SN 1

	/* multiply by 2 when task period = 351 ms */
	static inline int reg_to_micro_amp_h(s16 val, u16 rsense, int lsb)
	{
	/* LSB: 5.0μVh/RSENSE ; Rsense LSB is 10μΩ */
	return div_s64((s64) val * 500000, rsense) * lsb;
	}

	/* divide by 2 when task period = 351 ms */
	static inline s16 micro_amp_h_to_reg(int val, u16 rsense, int lsb)
	{
	/* LSB: 5.0μVh/RSENSE ; Rsense LSB is 10μΩ */
	return div_s64((s64)(val / lsb) * rsense, 500000);
	}

	static inline int reg_to_micro_volt(u16 val)
	{
	/* LSB: 0.078125mV */
	return div_u64((u64) val * 78125, 1000);
	}

	enum max17x0x_reg_tags {
	MAX17X0X_TAG_avgc,
	MAX17X0X_TAG_cnfg,
	MAX17X0X_TAG_mmdv,
	MAX17X0X_TAG_vcel,
	MAX17X0X_TAG_temp,
	MAX17X0X_TAG_curr,
	MAX17X0X_TAG_mcap,
	MAX17X0X_TAG_avgr,
	MAX17X0X_TAG_vfsoc,
	MAX17X0X_TAG_vfocv,

	MAX17X0X_TAG_BCNT,
	MAX17X0X_TAG_SNUM,
	MAX17X0X_TAG_HSTY,
	MAX17X0X_TAG_BCEA,
	MAX17X0X_TAG_rset,
	MAX17X0X_TAG_BRES,
	};

	enum max17x0x_reg_types {
	GBMS_ATOM_TYPE_MAP = 0,
	GBMS_ATOM_TYPE_REG = 1,
	GBMS_ATOM_TYPE_ZONE = 2,
	GBMS_ATOM_TYPE_SET = 3,
	};

	/* this is a map for u16 registers */
	#define ATOM_INIT_MAP(...) \
	.type = GBMS_ATOM_TYPE_MAP, \
	.size = 2 * sizeof((u8[]){__VA_ARGS__}),\
	.map = (u8[]){__VA_ARGS__}

	#define ATOM_INIT_REG16(r) \
	.type = GBMS_ATOM_TYPE_REG, \
	.size = 2, \
	.reg = r

	#define ATOM_INIT_ZONE(start, sz) \
	.type = GBMS_ATOM_TYPE_ZONE, \
	.size = sz, \
	.base = start

	/* a set has no storage and cannot be used in load/store */
	#define ATOM_INIT_SET(...) \
	.type = GBMS_ATOM_TYPE_SET, \
	.size = 0, \
	.map = (u8[]){__VA_ARGS__}

	#define ATOM_INIT_SET16(...) \
	.type = GBMS_ATOM_TYPE_SET, \
	.size = 0, \
	.map16 = (u16[]){__VA_ARGS__}

	struct max17x0x_reg {
	int type;
	int size;
	union {
	unsigned int base;
	unsigned int reg;
	const u16 *map16;
	const u8 *map;
	};
	};

	struct max17x0x_cache_data {
	struct max17x0x_reg atom;
	u16 *cache_data;
	};

	#define NB_REGMAP_MAX 256

	struct max17x0x_reglog {
	u16 data[NB_REGMAP_MAX];
	DECLARE_BITMAP(valid, NB_REGMAP_MAX);
	int errors[NB_REGMAP_MAX];
	int count[NB_REGMAP_MAX];
	};

	struct max17x0x_regtags {
	const struct max17x0x_reg *map;
	unsigned int max;
	};

	struct max17x0x_regmap {
	struct regmap *regmap;
	struct max17x0x_regtags regtags;
	struct max17x0x_reglog *reglog;
	};

	int max1720x_get_capacity(struct i2c_client client, int iic_raw);
	int max1720x_get_voltage_now(struct i2c_client client, int iic_raw);
	int max17x0x_sw_reset(struct i2c_client *client);

	/* */
	#ifdef CONFIG_MAX1720X_REGLOG_LOG
	static inline void max17x0x_reglog_log(struct max17x0x_reglog *reglog,
	unsigned int reg, u16 data, int rtn)
	{
	if (!reglog)
	return;

	reglog->count[reg] += 1;
	if (rtn != 0) {
	reglog->errors[reg] += 1;
	} else {
	__set_bit(reg, reglog->valid);
	reglog->data[reg] = data;
	}

	}

	#else
	static inline void max17x0x_reglog_log(struct max17x0x_reglog *reglog,
	unsigned int reg, u16 data, int rtn)
	{

	}
	#endif

	static inline int max17x0x_regmap_read(const struct max17x0x_regmap *map,
	unsigned int reg,
	u16 *val,
	const char *name)
	{
	int rtn;
	unsigned int tmp;

	if (!map->regmap) {
	pr_err("Failed to read %s, no regmap\n", name);
	return -EIO;
	}

	rtn = regmap_read(map->regmap, reg, &tmp);
	if (rtn)
	pr_err("Failed to read %s\n", name);
	else
	*val = tmp;

	return rtn;
	}

	#define REGMAP_READ(regmap, what, dst) \
	max17x0x_regmap_read(regmap, what, dst, #what)

	static inline int max17x0x_regmap_write(const struct max17x0x_regmap *map,
	unsigned int reg,
	u16 data,
	const char *name)
	{
	int rtn;

	if (!map->regmap) {
	pr_err("Failed to write %s, no regmap\n", name);
	return -EIO;
	}

	rtn = regmap_write(map->regmap, reg, data);
	if (rtn)
	pr_err("Failed to write %s\n", name);

	max17x0x_reglog_log(map->reglog, reg, data, rtn);

	return rtn;
	}

	#define REGMAP_WRITE(regmap, what, value) \
	max17x0x_regmap_write(regmap, what, value, #what)

	#define WAIT_VERIFY (10 * USEC_PER_MSEC) /* 10 msec */
	static inline int max1720x_regmap_writeverify(const struct max17x0x_regmap *map,
	unsigned int reg,
	u16 data,
	const char *name)
	{
	int tmp, ret, retries;

	if (!map->regmap) {
	pr_err("Failed to write %s, no regmap\n", name);
	return -EINVAL;
	}

	for (retries = 3; retries > 0; retries--) {
	ret = regmap_write(map->regmap, reg, data);
	if (ret < 0)
	continue;

	usleep_range(WAIT_VERIFY, WAIT_VERIFY + 100);

	ret = regmap_read(map->regmap, reg, &tmp);
	if (ret < 0)
	continue;

	if (tmp == data)
	return 0;
	}

	return -EIO;
	}

	#define REGMAP_WRITE_VERIFY(regmap, what, value) \
	max1720x_regmap_writeverify(regmap, what, value, #what)

	enum max1720x_drift_algo_version {
	MAX1720X_DA_VER_NONE = -1, /* MW RC2 */
	MAX1720X_DA_VER_ORIG = 0, /* MW A0, max1720x */
	MAX1720X_DA_VER_MWA1 = 1, /* MW A1 RC1 */
	MAX1720X_DA_VER_MWA2 = 2, /* MW A2 RC1 */
	};

	#define max1720x_check_drift_enabled(dd) \
	((dd)->algo_ver >= MAX1720X_DA_VER_ORIG)
	#define max1720x_check_drift_on_soc(dd) \
	((dd)->algo_ver == MAX1720X_DA_VER_MWA1)
	#define max1720x_check_drift_delay(dd) \
	((dd)->algo_ver == MAX1720X_DA_VER_MWA1 ? 351 : 0)

	/* fix to capacity estimation */
	struct max1720x_drift_data {
	u16 rsense;
	enum max1720x_drift_algo_version algo_ver;

	u16 design_capacity;
	int cycle_band;
	int cycle_fade;
	int cycle_stable;
	int ini_rcomp0;
	int ini_tempco;
	int ini_filtercfg;
	};

	struct max1720x_dyn_filtercfg {
	s32 temp;
	s32 hysteresis;
	u16 curr_val;
	u16 default_val;
	u16 adjust_val;
	struct mutex lock;
	};

	extern int max1720x_fixup_comp(struct max1720x_drift_data *ddata,
	struct max17x0x_regmap *map,
	int plugged);
	extern int max1720x_fixup_dxacc(struct max1720x_drift_data *ddata,
	struct max17x0x_regmap *map,
	int cycle_count,
	int plugged,
	int lsb);

	#endif