/* *  sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $) * *  Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> *  Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> *  Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * *  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. * *  You should have received a copy of the GNU General Public License along *  with this program; if not, write to the Free Software Foundation, Inc., *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */#include <linux/init.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/kernel.h>#ifdef CONFIG_ACPI_PROCFS_POWER#include <linux/proc_fs.h>#include <linux/seq_file.h>#include <asm/uaccess.h>#endif#include <linux/acpi.h>#include <linux/timer.h>#include <linux/jiffies.h>#include <linux/delay.h>#ifdef CONFIG_ACPI_SYSFS_POWER#include <linux/power_supply.h>#endif#include "sbshc.h"#define ACPI_SBS_CLASS			"sbs"#define ACPI_AC_CLASS			"ac_adapter"#define ACPI_BATTERY_CLASS		"battery"#define ACPI_SBS_DEVICE_NAME		"Smart Battery System"#define ACPI_SBS_FILE_INFO		"info"#define ACPI_SBS_FILE_STATE		"state"#define ACPI_SBS_FILE_ALARM		"alarm"#define ACPI_BATTERY_DIR_NAME		"BAT%i"#define ACPI_AC_DIR_NAME		"AC0"#define ACPI_SBS_NOTIFY_STATUS		0x80#define ACPI_SBS_NOTIFY_INFO		0x81MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");MODULE_LICENSE("GPL");static unsigned int cache_time = 1000;module_param(cache_time, uint, 0644);MODULE_PARM_DESC(cache_time, "cache time in milliseconds");extern struct proc_dir_entry *acpi_lock_ac_dir(void);extern struct proc_dir_entry *acpi_lock_battery_dir(void);extern void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);extern void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);#define MAX_SBS_BAT			4#define ACPI_SBS_BLOCK_MAX		32static const struct acpi_device_id sbs_device_ids[] = {	{"ACPI0002", 0},	{"", 0},};MODULE_DEVICE_TABLE(acpi, sbs_device_ids);struct acpi_battery {#ifdef CONFIG_ACPI_SYSFS_POWER	struct power_supply bat;#endif	struct acpi_sbs *sbs;#ifdef CONFIG_ACPI_PROCFS_POWER	struct proc_dir_entry *proc_entry;#endif	unsigned long update_time;	char name[8];	char manufacturer_name[ACPI_SBS_BLOCK_MAX];	char device_name[ACPI_SBS_BLOCK_MAX];	char device_chemistry[ACPI_SBS_BLOCK_MAX];	u16 alarm_capacity;	u16 full_charge_capacity;	u16 design_capacity;	u16 design_voltage;	u16 serial_number;	u16 cycle_count;	u16 temp_now;	u16 voltage_now;	s16 current_now;	s16 current_avg;	u16 capacity_now;	u16 state_of_charge;	u16 state;	u16 mode;	u16 spec;	u8 id;	u8 present:1;	u8 have_sysfs_alarm:1;};#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);struct acpi_sbs {#ifdef CONFIG_ACPI_SYSFS_POWER	struct power_supply charger;#endif	struct acpi_device *device;	struct acpi_smb_hc *hc;	struct mutex lock;#ifdef CONFIG_ACPI_PROCFS_POWER	struct proc_dir_entry *charger_entry;#endif	struct acpi_battery battery[MAX_SBS_BAT];	u8 batteries_supported:4;	u8 manager_present:1;	u8 charger_present:1;};#define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)static inline int battery_scale(int log){	int scale = 1;	while (log--)		scale *= 10;	return scale;}static inline int acpi_battery_vscale(struct acpi_battery *battery){	return battery_scale((battery->spec & 0x0f00) >> 8);}static inline int acpi_battery_ipscale(struct acpi_battery *battery){	return battery_scale((battery->spec & 0xf000) >> 12);}static inline int acpi_battery_mode(struct acpi_battery *battery){	return (battery->mode & 0x8000);}static inline int acpi_battery_scale(struct acpi_battery *battery){	return (acpi_battery_mode(battery) ? 10 : 1) *	    acpi_battery_ipscale(battery);}#ifdef CONFIG_ACPI_SYSFS_POWERstatic int sbs_get_ac_property(struct power_supply *psy,			       enum power_supply_property psp,			       union power_supply_propval *val){	struct acpi_sbs *sbs = to_acpi_sbs(psy);	switch (psp) {	case POWER_SUPPLY_PROP_ONLINE:		val->intval = sbs->charger_present;		break;	default:		return -EINVAL;	}	return 0;}static int acpi_battery_technology(struct acpi_battery *battery){	if (!strcasecmp("NiCd", battery->device_chemistry))		return POWER_SUPPLY_TECHNOLOGY_NiCd;	if (!strcasecmp("NiMH", battery->device_chemistry))		return POWER_SUPPLY_TECHNOLOGY_NiMH;	if (!strcasecmp("LION", battery->device_chemistry))		return POWER_SUPPLY_TECHNOLOGY_LION;	if (!strcasecmp("LiP", battery->device_chemistry))		return POWER_SUPPLY_TECHNOLOGY_LIPO;	return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;}static int acpi_sbs_battery_get_property(struct power_supply *psy,					 enum power_supply_property psp,					 union power_supply_propval *val){	struct acpi_battery *battery = to_acpi_battery(psy);	if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)		return -ENODEV;	switch (psp) {	case POWER_SUPPLY_PROP_STATUS:		if (battery->current_now < 0)			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;		else if (battery->current_now > 0)			val->intval = POWER_SUPPLY_STATUS_CHARGING;		else			val->intval = POWER_SUPPLY_STATUS_FULL;		break;	case POWER_SUPPLY_PROP_PRESENT:		val->intval = battery->present;		break;	case POWER_SUPPLY_PROP_TECHNOLOGY:		val->intval = acpi_battery_technology(battery);		break;	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:		val->intval = battery->design_voltage *			acpi_battery_vscale(battery) * 1000;		break;	case POWER_SUPPLY_PROP_VOLTAGE_NOW:		val->intval = battery->voltage_now *				acpi_battery_vscale(battery) * 1000;		break;	case POWER_SUPPLY_PROP_CURRENT_NOW:		val->intval = abs(battery->current_now) *				acpi_battery_ipscale(battery) * 1000;		break;	case POWER_SUPPLY_PROP_CURRENT_AVG:		val->intval = abs(battery->current_avg) *				acpi_battery_ipscale(battery) * 1000;		break;	case POWER_SUPPLY_PROP_CAPACITY:		val->intval = battery->state_of_charge;		break;	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:		val->intval = battery->design_capacity *			acpi_battery_scale(battery) * 1000;		break;	case POWER_SUPPLY_PROP_CHARGE_FULL:	case POWER_SUPPLY_PROP_ENERGY_FULL:		val->intval = battery->full_charge_capacity *			acpi_battery_scale(battery) * 1000;		break;	case POWER_SUPPLY_PROP_CHARGE_NOW:	case POWER_SUPPLY_PROP_ENERGY_NOW:		val->intval = battery->capacity_now *				acpi_battery_scale(battery) * 1000;		break;	case POWER_SUPPLY_PROP_TEMP:		val->intval = battery->temp_now - 2730;	// dK -> dC		break;	case POWER_SUPPLY_PROP_MODEL_NAME:		val->strval = battery->device_name;		break;	case POWER_SUPPLY_PROP_MANUFACTURER:		val->strval = battery->manufacturer_name;		break;	default:		return -EINVAL;	}	return 0;}static enum power_supply_property sbs_ac_props[] = {	POWER_SUPPLY_PROP_ONLINE,};static enum power_supply_property sbs_charge_battery_props[] = {	POWER_SUPPLY_PROP_STATUS,	POWER_SUPPLY_PROP_PRESENT,	POWER_SUPPLY_PROP_TECHNOLOGY,	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,	POWER_SUPPLY_PROP_VOLTAGE_NOW,	POWER_SUPPLY_PROP_CURRENT_NOW,	POWER_SUPPLY_PROP_CURRENT_AVG,	POWER_SUPPLY_PROP_CAPACITY,	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,	POWER_SUPPLY_PROP_CHARGE_FULL,	POWER_SUPPLY_PROP_CHARGE_NOW,	POWER_SUPPLY_PROP_TEMP,	POWER_SUPPLY_PROP_MODEL_NAME,	POWER_SUPPLY_PROP_MANUFACTURER,};static enum power_supply_property sbs_energy_battery_props[] = {	POWER_SUPPLY_PROP_STATUS,	POWER_SUPPLY_PROP_PRESENT,	POWER_SUPPLY_PROP_TECHNOLOGY,	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,	POWER_SUPPLY_PROP_VOLTAGE_NOW,	POWER_SUPPLY_PROP_CURRENT_NOW,	POWER_SUPPLY_PROP_CURRENT_AVG,	POWER_SUPPLY_PROP_CAPACITY,	POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,	POWER_SUPPLY_PROP_ENERGY_FULL,	POWER_SUPPLY_PROP_ENERGY_NOW,	POWER_SUPPLY_PROP_TEMP,	POWER_SUPPLY_PROP_MODEL_NAME,	POWER_SUPPLY_PROP_MANUFACTURER,};#endif/* --------------------------------------------------------------------------                            Smart Battery System Management   -------------------------------------------------------------------------- */struct acpi_battery_reader {	u8 command;		/* command for battery */	u8 mode;		/* word or block? */	size_t offset;		/* offset inside struct acpi_sbs_battery */};static struct acpi_battery_reader info_readers[] = {	{0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},	{0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},	{0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},	{0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},	{0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},	{0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},	{0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},	{0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},	{0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},	{0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},	{0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},};static struct acpi_battery_reader state_readers[] = {	{0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},	{0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},	{0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_now)},	{0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, current_avg)},	{0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},	{0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},	{0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},};static int acpi_manager_get_info(struct acpi_sbs *sbs){	int result = 0;	u16 battery_system_info;	result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,				 0x04, (u8 *)&battery_system_info);	if (!result)		sbs->batteries_supported = battery_system_info & 0x000f;	return result;}static int acpi_battery_get_info(struct acpi_battery *battery){	int i, result = 0;	for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {		result = acpi_smbus_read(battery->sbs->hc,					 info_readers[i].mode,					 ACPI_SBS_BATTERY,					 info_readers[i].command,					 (u8 *) battery +						info_readers[i].offset);		if (result)			break;	}	return result;}static int acpi_battery_get_state(struct acpi_battery *battery){	int i, result = 0;	if (battery->update_time &&	    time_before(jiffies, battery->update_time +				msecs_to_jiffies(cache_time)))		return 0;	for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {		result = acpi_smbus_read(battery->sbs->hc,					 state_readers[i].mode,					 ACPI_SBS_BATTERY,					 state_readers[i].command,				         (u8 *)battery +						state_readers[i].offset);		if (result)			goto end;	}      end:	battery->update_time = jiffies;	return result;}static int acpi_battery_get_alarm(struct acpi_battery *battery){	return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,				 ACPI_SBS_BATTERY, 0x01,				 (u8 *)&battery->alarm_capacity);}static int acpi_battery_set_alarm(struct acpi_battery *battery){	struct acpi_sbs *sbs = battery->sbs;	u16 value, sel = 1 << (battery->id + 12);	int ret;	if (sbs->manager_present) {		ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,				0x01, (u8 *)&value);		if (ret)			goto end;		if ((value & 0xf000) != sel) {			value &= 0x0fff;			value |= sel;		ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,					 ACPI_SBS_MANAGER,					 0x01, (u8 *)&value, 2);		if (ret)			goto end;		}	}	ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,				0x01, (u8 *)&battery->alarm_capacity, 2);      end:	return ret;}static int acpi_ac_get_present(struct acpi_sbs *sbs){	int result;	u16 status;	result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,				 0x13, (u8 *) & status);	if (!result)		sbs->charger_present = (status >> 15) & 0x1;	return result;}#ifdef CONFIG_ACPI_SYSFS_POWERstatic ssize_t acpi_battery_alarm_show(struct device *dev,					struct device_attribute *attr,					char *buf){	struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));	acpi_battery_get_alarm(battery);	return sprintf(buf, "%d\n", battery->alarm_capacity *				acpi_battery_scale(battery) * 1000);}static ssize_t acpi_battery_alarm_store(struct device *dev,					struct device_attribute *attr,					const char *buf, size_t count){	unsigned long x;	struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));	if (sscanf(buf, "%ld\n", &x) == 1)		battery->alarm_capacity = x /			(1000 * acpi_battery_scale(battery));	if (battery->present)		acpi_battery_set_alarm(battery);	return count;}static struct device_attribute alarm_attr = {	.attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},	.show = acpi_battery_alarm_show,	.store = acpi_battery_alarm_store,};#endif/* --------------------------------------------------------------------------                              FS Interface (/proc/acpi)   -------------------------------------------------------------------------- */#ifdef CONFIG_ACPI_PROCFS_POWER/* Generic Routines */static intacpi_sbs_add_fs(struct proc_dir_entry **dir,		struct proc_dir_entry *parent_dir,		char *dir_name,		struct file_operations *info_fops,		struct file_operations *state_fops,		struct file_operations *alarm_fops, void *data){	struct proc_dir_entry *entry = NULL;	if (!*dir) {		*dir = proc_mkdir(dir_name, parent_dir);		if (!*dir) {			return -ENODEV;		}		(*dir)->owner = THIS_MODULE;	}	/* 'info' [R] */	if (info_fops) {		entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);		if (entry) {			entry->proc_fops = info_fops;			entry->data = data;			entry->owner = THIS_MODULE;		}	}	/* 'state' [R] */	if (state_fops) {		entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);		if (entry) {			entry->proc_fops = state_fops;			entry->data = data;			entry->owner = THIS_MODULE;		}	}	/* 'alarm' [R/W] */	if (alarm_fops) {		entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);		if (entry) {			entry->proc_fops = alarm_fops;			entry->data = data;			entry->owner = THIS_MODULE;		}	}	return 0;}static voidacpi_sbs_remove_fs(struct proc_dir_entry **dir,			   struct proc_dir_entry *parent_dir){