diff options
Diffstat (limited to 'drivers/acpi/sbs.c')
| -rw-r--r-- | drivers/acpi/sbs.c | 1043 |
1 files changed, 1043 insertions, 0 deletions
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c new file mode 100644 index 0000000..6050ce4 --- /dev/null +++ b/drivers/acpi/sbs.c @@ -0,0 +1,1043 @@ +/* + * 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 0x81 + +MODULE_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 32 + +static 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_POWER +static 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_POWER +static 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}, + .show = acpi_battery_alarm_show, + .store = acpi_battery_alarm_store, +}; +#endif + +/* -------------------------------------------------------------------------- + FS Interface (/proc/acpi) + -------------------------------------------------------------------------- */ + +#ifdef CONFIG_ACPI_PROCFS_POWER +/* Generic Routines */ +static int +acpi_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) +{ + if (!*dir) { + *dir = proc_mkdir(dir_name, parent_dir); + if (!*dir) { + return -ENODEV; + } + (*dir)->owner = THIS_MODULE; + } + + /* 'info' [R] */ + if (info_fops) + proc_create_data(ACPI_SBS_FILE_INFO, S_IRUGO, *dir, + info_fops, data); + + /* 'state' [R] */ + if (state_fops) + proc_create_data(ACPI_SBS_FILE_STATE, S_IRUGO, *dir, + state_fops, data); + + /* 'alarm' [R/W] */ + if (alarm_fops) + proc_create_data(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir, + alarm_fops, data); + return 0; +} + +static void +acpi_sbs_remove_fs(struct proc_dir_entry **dir, + struct proc_dir_entry *parent_dir) +{ + if (*dir) { + remove_proc_entry(ACPI_SBS_FILE_INFO, *dir); + remove_proc_entry(ACPI_SBS_FILE_STATE, *dir); + remove_proc_entry(ACPI_SBS_FILE_ALARM, *dir); + remove_proc_entry((*dir)->name, parent_dir); + *dir = NULL; + } +} + +/* Smart Battery Interface */ +static struct proc_dir_entry *acpi_battery_dir = NULL; + +static inline char *acpi_battery_units(struct acpi_battery *battery) +{ + return acpi_battery_mode(battery) ? " mW" : " mA"; +} + + +static int acpi_battery_read_info(struct seq_file *seq, void *offset) +{ + struct acpi_battery *battery = seq->private; + struct acpi_sbs *sbs = battery->sbs; + int result = 0; + + mutex_lock(&sbs->lock); + + seq_printf(seq, "present: %s\n", + (battery->present) ? "yes" : "no"); + if (!battery->present) + goto end; + + seq_printf(seq, "design capacity: %i%sh\n", + battery->design_capacity * acpi_battery_scale(battery), + acpi_battery_units(battery)); + seq_printf(seq, "last full capacity: %i%sh\n", + battery->full_charge_capacity * acpi_battery_scale(battery), + acpi_battery_units(battery)); + seq_printf(seq, "battery technology: rechargeable\n"); + seq_printf(seq, "design voltage: %i mV\n", + battery->design_voltage * acpi_battery_vscale(battery)); + seq_printf(seq, "design capacity warning: unknown\n"); + seq_printf(seq, "design capacity low: unknown\n"); + seq_printf(seq, "capacity granularity 1: unknown\n"); + seq_printf(seq, "capacity granularity 2: unknown\n"); + seq_printf(seq, "model number: %s\n", battery->device_name); + seq_printf(seq, "serial number: %i\n", + battery->serial_number); + seq_printf(seq, "battery type: %s\n", + battery->device_chemistry); + seq_printf(seq, "OEM info: %s\n", + battery->manufacturer_name); + end: + mutex_unlock(&sbs->lock); + return result; +} + +static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_battery_read_info, PDE(inode)->data); +} + +static int acpi_battery_read_state(struct seq_file *seq, void *offset) +{ + struct acpi_battery *battery = seq->private; + struct acpi_sbs *sbs = battery->sbs; + int rate; + + mutex_lock(&sbs->lock); + seq_printf(seq, "present: %s\n", + (battery->present) ? "yes" : "no"); + if (!battery->present) + goto end; + + acpi_battery_get_state(battery); + seq_printf(seq, "capacity state: %s\n", + (battery->state & 0x0010) ? "critical" : "ok"); + seq_printf(seq, "charging state: %s\n", + (battery->current_now < 0) ? "discharging" : + ((battery->current_now > 0) ? "charging" : "charged")); + rate = abs(battery->current_now) * acpi_battery_ipscale(battery); + rate *= (acpi_battery_mode(battery))?(battery->voltage_now * + acpi_battery_vscale(battery)/1000):1; + seq_printf(seq, "present rate: %d%s\n", rate, + acpi_battery_units(battery)); + seq_printf(seq, "remaining capacity: %i%sh\n", + battery->capacity_now * acpi_battery_scale(battery), + acpi_battery_units(battery)); + seq_printf(seq, "present voltage: %i mV\n", + battery->voltage_now * acpi_battery_vscale(battery)); + + end: + mutex_unlock(&sbs->lock); + return 0; +} + +static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_battery_read_state, PDE(inode)->data); +} + +static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) +{ + struct acpi_battery *battery = seq->private; + struct acpi_sbs *sbs = battery->sbs; + int result = 0; + + mutex_lock(&sbs->lock); + + if (!battery->present) { + seq_printf(seq, "present: no\n"); + goto end; + } + + acpi_battery_get_alarm(battery); + seq_printf(seq, "alarm: "); + if (battery->alarm_capacity) + seq_printf(seq, "%i%sh\n", + battery->alarm_capacity * + acpi_battery_scale(battery), + acpi_battery_units(battery)); + else + seq_printf(seq, "disabled\n"); + end: + mutex_unlock(&sbs->lock); + return result; +} + +static ssize_t +acpi_battery_write_alarm(struct file *file, const char __user * buffer, + size_t count, loff_t * ppos) +{ + struct seq_file *seq = file->private_data; + struct acpi_battery *battery = seq->private; + struct acpi_sbs *sbs = battery->sbs; + char alarm_string[12] = { '\0' }; + int result = 0; + mutex_lock(&sbs->lock); + if (!battery->present) { + result = -ENODEV; + goto end; + } + if (count > sizeof(alarm_string) - 1) { + result = -EINVAL; + goto end; + } + if (copy_from_user(alarm_string, buffer, count)) { + result = -EFAULT; + goto end; + } + alarm_string[count] = 0; + battery->alarm_capacity = simple_strtoul(alarm_string, NULL, 0) / + acpi_battery_scale(battery); + acpi_battery_set_alarm(battery); + end: + mutex_unlock(&sbs->lock); + if (result) + return result; + return count; +} + +static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); +} + +static struct file_operations acpi_battery_info_fops = { + .open = acpi_battery_info_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +static struct file_operations acpi_battery_state_fops = { + .open = acpi_battery_state_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +static struct file_operations acpi_battery_alarm_fops = { + .open = acpi_battery_alarm_open_fs, + .read = seq_read, + .write = acpi_battery_write_alarm, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +/* Legacy AC Adapter Interface */ + +static struct proc_dir_entry *acpi_ac_dir = NULL; + +static int acpi_ac_read_state(struct seq_file *seq, void *offset) +{ + + struct acpi_sbs *sbs = seq->private; + + mutex_lock(&sbs->lock); + + seq_printf(seq, "state: %s\n", + sbs->charger_present ? "on-line" : "off-line"); + + mutex_unlock(&sbs->lock); + return 0; +} + +static int acpi_ac_state_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_ac_read_state, PDE(inode)->data); +} + +static struct file_operations acpi_ac_state_fops = { + .open = acpi_ac_state_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +#endif + +/* -------------------------------------------------------------------------- + Driver Interface + -------------------------------------------------------------------------- */ +static int acpi_battery_read(struct acpi_battery *battery) +{ + int result = 0, saved_present = battery->present; + u16 state; + + if (battery->sbs->manager_present) { + result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, + ACPI_SBS_MANAGER, 0x01, (u8 *)&state); + if (!result) + battery->present = state & (1 << battery->id); + state &= 0x0fff; + state |= 1 << (battery->id + 12); + acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, + ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); + } else if (battery->id == 0) + battery->present = 1; + if (result || !battery->present) + return result; + + if (saved_present != battery->present) { + battery->update_time = 0; + result = acpi_battery_get_info(battery); + if (result) + return result; + } + result = acpi_battery_get_state(battery); + return result; +} + +/* Smart Battery */ +static int acpi_battery_add(struct acpi_sbs *sbs, int id) +{ + struct acpi_battery *battery = &sbs->battery[id]; + int result; + + battery->id = id; + battery->sbs = sbs; + result = acpi_battery_read(battery); + if (result) + return result; + + sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); +#ifdef CONFIG_ACPI_PROCFS_POWER + acpi_sbs_add_fs(&battery->proc_entry, acpi_battery_dir, + battery->name, &acpi_battery_info_fops, + &acpi_battery_state_fops, &acpi_battery_alarm_fops, + battery); +#endif +#ifdef CONFIG_ACPI_SYSFS_POWER + battery->bat.name = battery->name; + battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; + if (!acpi_battery_mode(battery)) { + battery->bat.properties = sbs_charge_battery_props; + battery->bat.num_properties = + ARRAY_SIZE(sbs_charge_battery_props); + } else { + battery->bat.properties = sbs_energy_battery_props; + battery->bat.num_properties = + ARRAY_SIZE(sbs_energy_battery_props); + } + battery->bat.get_property = acpi_sbs_battery_get_property; + result = power_supply_register(&sbs->device->dev, &battery->bat); + if (result) + goto end; + result = device_create_file(battery->bat.dev, &alarm_attr); + if (result) + goto end; + battery->have_sysfs_alarm = 1; + end: +#endif + printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", + ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), + battery->name, battery->present ? "present" : "absent"); + return result; +} + +static void acpi_battery_remove(struct acpi_sbs *sbs, int id) +{ + struct acpi_battery *battery = &sbs->battery[id]; +#ifdef CONFIG_ACPI_SYSFS_POWER + if (battery->bat.dev) { + if (battery->have_sysfs_alarm) + device_remove_file(battery->bat.dev, &alarm_attr); + power_supply_unregister(&battery->bat); + } +#endif +#ifdef CONFIG_ACPI_PROCFS_POWER + if (battery->proc_entry) + acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir); +#endif +} + +static int acpi_charger_add(struct acpi_sbs *sbs) +{ + int result; + + result = acpi_ac_get_present(sbs); + if (result) + goto end; +#ifdef CONFIG_ACPI_PROCFS_POWER + result = acpi_sbs_add_fs(&sbs->charger_entry, acpi_ac_dir, + ACPI_AC_DIR_NAME, NULL, + &acpi_ac_state_fops, NULL, sbs); + if (result) + goto end; +#endif +#ifdef CONFIG_ACPI_SYSFS_POWER + sbs->charger.name = "sbs-charger"; + sbs->charger.type = POWER_SUPPLY_TYPE_MAINS; + sbs->charger.properties = sbs_ac_props; + sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props); + sbs->charger.get_property = sbs_get_ac_property; + power_supply_register(&sbs->device->dev, &sbs->charger); +#endif + printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n", + ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), + ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); + end: + return result; +} + +static void acpi_charger_remove(struct acpi_sbs *sbs) +{ +#ifdef CONFIG_ACPI_SYSFS_POWER + if (sbs->charger.dev) + power_supply_unregister(&sbs->charger); +#endif +#ifdef CONFIG_ACPI_PROCFS_POWER + if (sbs->charger_entry) + acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir); +#endif +} + +static void acpi_sbs_callback(void *context) +{ + int id; + struct acpi_sbs *sbs = context; + struct acpi_battery *bat; + u8 saved_charger_state = sbs->charger_present; + u8 saved_battery_state; + acpi_ac_get_present(sbs); + if (sbs->charger_present != saved_charger_state) { +#ifdef CONFIG_ACPI_PROC_EVENT + acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, + ACPI_SBS_NOTIFY_STATUS, + sbs->charger_present); +#endif +#ifdef CONFIG_ACPI_SYSFS_POWER + kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE); +#endif + } + if (sbs->manager_present) { + for (id = 0; id < MAX_SBS_BAT; ++id) { + if (!(sbs->batteries_supported & (1 << id))) + continue; + bat = &sbs->battery[id]; + saved_battery_state = bat->present; + acpi_battery_read(bat); + if (saved_battery_state == bat->present) + continue; +#ifdef CONFIG_ACPI_PROC_EVENT + acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, + bat->name, + ACPI_SBS_NOTIFY_STATUS, + bat->present); +#endif +#ifdef CONFIG_ACPI_SYSFS_POWER + kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE); +#endif + } + } +} + +static int acpi_sbs_remove(struct acpi_device *device, int type); + +static int acpi_sbs_add(struct acpi_device *device) +{ + struct acpi_sbs *sbs; + int result = 0; + int id; + + sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); + if (!sbs) { + result = -ENOMEM; + goto end; + } + + mutex_init(&sbs->lock); + + sbs->hc = acpi_driver_data(device->parent); + sbs->device = device; + strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_SBS_CLASS); + device->driver_data = sbs; + + result = acpi_charger_add(sbs); + if (result) + goto end; + + result = acpi_manager_get_info(sbs); + if (!result) { + sbs->manager_present = 1; + for (id = 0; id < MAX_SBS_BAT; ++id) + if ((sbs->batteries_supported & (1 << id))) + acpi_battery_add(sbs, id); + } else + acpi_battery_add(sbs, 0); + acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); + end: + if (result) + acpi_sbs_remove(device, 0); + return result; +} + +static int acpi_sbs_remove(struct acpi_device *device, int type) +{ + struct acpi_sbs *sbs; + int id; + + if (!device) + return -EINVAL; + sbs = acpi_driver_data(device); + if (!sbs) + return -EINVAL; + mutex_lock(&sbs->lock); + acpi_smbus_unregister_callback(sbs->hc); + for (id = 0; id < MAX_SBS_BAT; ++id) + acpi_battery_remove(sbs, id); + acpi_charger_remove(sbs); + mutex_unlock(&sbs->lock); + mutex_destroy(&sbs->lock); + kfree(sbs); + return 0; +} + +static void acpi_sbs_rmdirs(void) +{ +#ifdef CONFIG_ACPI_PROCFS_POWER + if (acpi_ac_dir) { + acpi_unlock_ac_dir(acpi_ac_dir); + acpi_ac_dir = NULL; + } + if (acpi_battery_dir) { + acpi_unlock_battery_dir(acpi_battery_dir); + acpi_battery_dir = NULL; + } +#endif +} + +static int acpi_sbs_resume(struct acpi_device *device) +{ + struct acpi_sbs *sbs; + if (!device) + return -EINVAL; + sbs = device->driver_data; + acpi_sbs_callback(sbs); + return 0; +} + +static struct acpi_driver acpi_sbs_driver = { + .name = "sbs", + .class = ACPI_SBS_CLASS, + .ids = sbs_device_ids, + .ops = { + .add = acpi_sbs_add, + .remove = acpi_sbs_remove, + .resume = acpi_sbs_resume, + }, +}; + +static int __init acpi_sbs_init(void) +{ + int result = 0; + + if (acpi_disabled) + return -ENODEV; +#ifdef CONFIG_ACPI_PROCFS_POWER + acpi_ac_dir = acpi_lock_ac_dir(); + if (!acpi_ac_dir) + return -ENODEV; + acpi_battery_dir = acpi_lock_battery_dir(); + if (!acpi_battery_dir) { + acpi_sbs_rmdirs(); + return -ENODEV; + } +#endif + result = acpi_bus_register_driver(&acpi_sbs_driver); + if (result < 0) { + acpi_sbs_rmdirs(); + return -ENODEV; + } + return 0; +} + +static void __exit acpi_sbs_exit(void) +{ + acpi_bus_unregister_driver(&acpi_sbs_driver); + acpi_sbs_rmdirs(); + return; +} + +module_init(acpi_sbs_init); +module_exit(acpi_sbs_exit); |
