/* * acpi_sbs.c - ACPI Smart Battery System Driver ($Revision: 1.16 $) * * Copyright (c) 2005 Rich Townsend * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * 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 #include #include #include #include #include #include #include #include #include #include #include "sbshc.h" #define ACPI_SBS_COMPONENT 0x00080000 #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_SBC_SMBUS_ADDR 0x9 #define ACPI_SBSM_SMBUS_ADDR 0xa #define ACPI_SB_SMBUS_ADDR 0xb #define ACPI_SBS_AC_NOTIFY_STATUS 0x80 #define ACPI_SBS_BATTERY_NOTIFY_STATUS 0x80 #define ACPI_SBS_BATTERY_NOTIFY_INFO 0x81 #define _COMPONENT ACPI_SBS_COMPONENT ACPI_MODULE_NAME("sbs"); MODULE_AUTHOR("Rich Townsend"); MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); MODULE_LICENSE("GPL"); #define DEF_CAPACITY_UNIT 3 #define MAH_CAPACITY_UNIT 1 #define MWH_CAPACITY_UNIT 2 #define CAPACITY_UNIT DEF_CAPACITY_UNIT #define REQUEST_UPDATE_MODE 1 #define QUEUE_UPDATE_MODE 2 #define DATA_TYPE_COMMON 0 #define DATA_TYPE_INFO 1 #define DATA_TYPE_STATE 2 #define DATA_TYPE_ALARM 3 #define DATA_TYPE_AC_STATE 4 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 #define UPDATE_DELAY 10 /* 0 - every time, > 0 - by update_time */ static unsigned int update_time = 120; static unsigned int mode = CAPACITY_UNIT; module_param(update_time, uint, 0644); module_param(mode, uint, 0444); static int acpi_sbs_add(struct acpi_device *device); static int acpi_sbs_remove(struct acpi_device *device, int type); static int acpi_sbs_resume(struct acpi_device *device); static const struct acpi_device_id sbs_device_ids[] = { {"ACPI0002", 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, sbs_device_ids); 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, }, }; struct acpi_battery { struct acpi_sbs *sbs; struct proc_dir_entry *proc_entry; int vscale; int ipscale; char manufacturer_name[ACPI_SBS_BLOCK_MAX]; char device_name[ACPI_SBS_BLOCK_MAX]; char device_chemistry[ACPI_SBS_BLOCK_MAX]; u16 full_charge_capacity; u16 design_capacity; u16 design_voltage; u16 serial_number; u16 voltage_now; s16 current_now; u16 capacity_now; u16 state; u16 alarm_capacity; u16 mode; u8 id; u8 alive:1; u8 init_state:1; u8 present:1; }; struct acpi_sbs { struct acpi_device *device; struct acpi_smb_hc *hc; struct mutex mutex; struct proc_dir_entry *ac_entry; struct acpi_battery battery[MAX_SBS_BAT]; int zombie; struct timer_list update_timer; int run_cnt; int update_proc_flg; u8 batteries_supported; u8 manager_present:1; u8 charger_present:1; }; static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type); static void acpi_sbs_update_time(void *data); static int sbs_zombie(struct acpi_sbs *sbs) { return (sbs->zombie); } static int sbs_mutex_lock(struct acpi_sbs *sbs) { if (sbs_zombie(sbs)) { return -ENODEV; } mutex_lock(&sbs->mutex); return 0; } static void sbs_mutex_unlock(struct acpi_sbs *sbs) { mutex_unlock(&sbs->mutex); } /* -------------------------------------------------------------------------- Smart Battery System Management -------------------------------------------------------------------------- */ static int acpi_check_update_proc(struct acpi_sbs *sbs) { acpi_status status = AE_OK; if (update_time == 0) { sbs->update_proc_flg = 0; return 0; } if (sbs->update_proc_flg == 0) { status = acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_time, sbs); if (status != AE_OK) { ACPI_EXCEPTION((AE_INFO, status, "acpi_os_execute() failed")); return 1; } sbs->update_proc_flg = 1; } return 0; } static int acpi_battery_get_present(struct acpi_battery *battery) { s16 state; int result = 0; int is_present = 0; result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SBSM_SMBUS_ADDR, 0x01, (u8 *)&state); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); } if (!result) { is_present = (state & 0x000f) & (1 << battery->id); } battery->present = is_present; return result; } static int acpi_battery_select(struct acpi_battery *battery) { struct acpi_sbs *sbs = battery->sbs; int result = 0; s16 state; int foo; if (sbs->manager_present) { /* Take special care not to knobble other nibbles of * state (aka selector_state), since * it causes charging to halt on SBSELs */ result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SBSM_SMBUS_ADDR, 0x01, (u8 *)&state); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } foo = (state & 0x0fff) | (1 << (battery->id + 12)); result = acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, ACPI_SBSM_SMBUS_ADDR, 0x01, (u8 *)&foo, 2); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_write() failed")); goto end; } } end: return result; } static int acpi_sbsm_get_info(struct acpi_sbs *sbs) { int result = 0; s16 battery_system_info; result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBSM_SMBUS_ADDR, 0x04, (u8 *)&battery_system_info); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } sbs->manager_present = 1; end: return result; } static int acpi_battery_get_info(struct acpi_battery *battery) { int result = 0; s16 battery_mode; s16 specification_info; result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } battery->mode = (battery_mode & 0x8000) >> 15; result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x10, (u8 *)&battery->full_charge_capacity); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x18, (u8 *)&battery->design_capacity); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x19, (u8 *)&battery->design_voltage); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x1a, (u8 *)&specification_info); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } switch ((specification_info & 0x0f00) >> 8) { case 1: battery->vscale = 10; break; case 2: battery->vscale = 100; break; case 3: battery->vscale = 1000; break; default: battery->vscale = 1; } switch ((specification_info & 0xf000) >> 12) { case 1: battery->ipscale = 10; break; case 2: battery->ipscale = 100; break; case 3: battery->ipscale = 1000; break; default: battery->ipscale = 1; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x1c, (u8 *)&battery->serial_number); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_BLOCK, ACPI_SB_SMBUS_ADDR, 0x20, (u8 *)battery->manufacturer_name); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_str() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_BLOCK, ACPI_SB_SMBUS_ADDR, 0x21, (u8 *)battery->device_name); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_str() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_BLOCK, ACPI_SB_SMBUS_ADDR, 0x22, (u8 *)battery->device_chemistry); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_str() failed")); goto end; } end: return result; } static int acpi_battery_get_state(struct acpi_battery *battery) { int result = 0; result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x09, (u8 *)&battery->voltage_now); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x0a, (u8 *)&battery->current_now); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x0f, (u8 *)&battery->capacity_now); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x16, (u8 *)&battery->state); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } end: return result; } static int acpi_battery_get_alarm(struct acpi_battery *battery) { int result = 0; result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x01, (u8 *)&battery->alarm_capacity); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } end: return result; } static int acpi_battery_set_alarm(struct acpi_battery *battery, unsigned long alarm) { int result = 0; s16 battery_mode; int foo; result = acpi_battery_select(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_select() failed")); goto end; } /* If necessary, enable the alarm */ if (alarm > 0) { result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } battery_mode &= 0xbfff; result = acpi_smbus_write(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x01, (u8 *)&battery_mode, 2); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_write() failed")); goto end; } } foo = alarm / (battery->mode ? 10 : 1); result = acpi_smbus_write(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x01, (u8 *)&foo, 2); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_write() failed")); goto end; } end: return result; } static int acpi_battery_set_mode(struct acpi_battery *battery) { int result = 0; s16 battery_mode; if (mode == DEF_CAPACITY_UNIT) { goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } if (mode == MAH_CAPACITY_UNIT) { battery_mode &= 0x7fff; } else { battery_mode |= 0x8000; } result = acpi_smbus_write(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode, 2); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_write() failed")); goto end; } result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, ACPI_SB_SMBUS_ADDR, 0x03, (u8 *)&battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } end: return result; } static int acpi_battery_init(struct acpi_battery *battery) { int result = 0; result = acpi_battery_select(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_select() failed")); goto end; } result = acpi_battery_set_mode(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_set_mode() failed")); goto end; } result = acpi_battery_get_info(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_info() failed")); goto end; } result = acpi_battery_get_state(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_state() failed")); goto end; } result = acpi_battery_get_alarm(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_alarm() failed")); goto end; } end: return result; } static int acpi_ac_get_present(struct acpi_sbs *sbs) { int result = 0; s16 charger_status; result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBC_SMBUS_ADDR, 0x13, (u8 *)&charger_status); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_smbus_read() failed")); goto end; } sbs->charger_present = (charger_status & 0x8000) >> 15; end: return result; } /* -------------------------------------------------------------------------- FS Interface (/proc/acpi) -------------------------------------------------------------------------- */ /* Generic Routines */ static int acpi_sbs_generic_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) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "proc_mkdir() failed")); return -ENODEV; } (*dir)->owner = THIS_MODULE; } /* 'info' [R] */ if (info_fops) { entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir); if (!entry) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "create_proc_entry() failed")); } else { 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) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "create_proc_entry() failed")); } else { 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) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "create_proc_entry() failed")); } else { entry->proc_fops = alarm_fops; entry->data = data; entry->owner = THIS_MODULE; } } return 0; } static void acpi_sbs_generic_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 int acpi_battery_read_info(struct seq_file *seq, void *offset) { struct acpi_battery *battery = seq->private; struct acpi_sbs *sbs = battery->sbs; int cscale; int result = 0; if (sbs_mutex_lock(sbs)) { return -ENODEV; } result = acpi_check_update_proc(sbs); if (result) goto end; if (update_time == 0) { result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_INFO); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_update_run() failed")); } } if (battery->present) { seq_printf(seq, "present: yes\n"); } else { seq_printf(seq, "present: no\n"); goto end; } if (battery->mode) { cscale = battery->vscale * battery->ipscale; } else { cscale = battery->ipscale; } seq_printf(seq, "design capacity: %i%s\n", battery->design_capacity * cscale, battery->mode ? "0 mWh" : " mAh"); seq_printf(seq, "last full capacity: %i%s\n", battery->full_charge_capacity * cscale, battery->mode ? "0 mWh" : " mAh"); seq_printf(seq, "battery technology: rechargeable\n"); seq_printf(seq, "design voltage: %i mV\n", battery->design_voltage * battery->vscale); 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: sbs_mutex_unlock(sbs); 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 result = 0; int cscale; int foo; if (sbs_mutex_lock(sbs)) { return -ENODEV; } result = acpi_check_update_proc(sbs); if (result) goto end; if (update_time == 0) { result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_STATE); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_update_run() failed")); } } if (battery->present) { seq_printf(seq, "present: yes\n"); } else { seq_printf(seq, "present: no\n"); goto end; } if (battery->mode) { cscale = battery->vscale * battery->ipscale; } else { cscale = battery->ipscale; } if (battery->state & 0x0010) { seq_printf(seq, "capacity state: critical\n"); } else { seq_printf(seq, "capacity state: ok\n"); } foo = (s16) battery->current_now * battery->ipscale; if (battery->mode) { foo = foo * battery->design_voltage / 1000; } if (battery->current_now < 0) { seq_printf(seq, "charging state: discharging\n"); seq_printf(seq, "present rate: %d %s\n", -foo, battery->mode ? "mW" : "mA"); } else if (battery->current_now > 0) { seq_printf(seq, "charging state: charging\n"); seq_printf(seq, "present rate: %d %s\n", foo, battery->mode ? "mW" : "mA"); } else { seq_printf(seq, "charging state: charged\n"); seq_printf(seq, "present rate: 0 %s\n", battery->mode ? "mW" : "mA"); } seq_printf(seq, "remaining capacity: %i%s\n", battery->capacity_now * cscale, battery->mode ? "0 mWh" : " mAh"); seq_printf(seq, "present voltage: %i mV\n", battery->voltage_now * battery->vscale); end: sbs_mutex_unlock(sbs); return result; } 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; int cscale; if (sbs_mutex_lock(sbs)) { return -ENODEV; } result = acpi_check_update_proc(sbs); if (result) goto end; if (update_time == 0) { result = acpi_sbs_update_run(sbs, battery->id, DATA_TYPE_ALARM); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_update_run() failed")); } } if (!battery->present) { seq_printf(seq, "present: no\n"); goto end; } if (battery->mode) { cscale = battery->vscale * battery->ipscale; } else { cscale = battery->ipscale; } seq_printf(seq, "alarm: "); if (battery->alarm_capacity) { seq_printf(seq, "%i%s\n", battery->alarm_capacity * cscale, battery->mode ? "0 mWh" : " mAh"); } else { seq_printf(seq, "disabled\n"); } end: sbs_mutex_unlock(sbs); 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, old_alarm, new_alarm; if (sbs_mutex_lock(sbs)) { return -ENODEV; } result = acpi_check_update_proc(sbs); if (result) goto end; 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; old_alarm = battery->alarm_capacity; new_alarm = simple_strtoul(alarm_string, NULL, 0); result = acpi_battery_set_alarm(battery, new_alarm); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_set_alarm() failed")); acpi_battery_set_alarm(battery, old_alarm); goto end; } result = acpi_battery_get_alarm(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_alarm() failed")); acpi_battery_set_alarm(battery, old_alarm); goto end; } end: sbs_mutex_unlock(sbs); if (result) { return result; } else { 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; int result; if (sbs_mutex_lock(sbs)) { return -ENODEV; } if (update_time == 0) { result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_AC_STATE); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_update_run() failed")); } } seq_printf(seq, "state: %s\n", sbs->charger_present ? "on-line" : "off-line"); sbs_mutex_unlock(sbs); 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, }; /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ /* Smart Battery */ static int acpi_battery_add(struct acpi_sbs *sbs, int id) { int is_present; int result; char dir_name[32]; struct acpi_battery *battery; battery = &sbs->battery[id]; battery->alive = 0; battery->init_state = 0; battery->id = id; battery->sbs = sbs; result = acpi_battery_select(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_select() failed")); goto end; } result = acpi_battery_get_present(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_present() failed")); goto end; } is_present = battery->present; if (is_present) { result = acpi_battery_init(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_init() failed")); goto end; } battery->init_state = 1; } sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id); result = acpi_sbs_generic_add_fs(&battery->proc_entry, acpi_battery_dir, dir_name, &acpi_battery_info_fops, &acpi_battery_state_fops, &acpi_battery_alarm_fops, battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_generic_add_fs() failed")); goto end; } battery->alive = 1; printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n", ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), dir_name, sbs->battery->present ? "present" : "absent"); end: return result; } static void acpi_battery_remove(struct acpi_sbs *sbs, int id) { if (sbs->battery[id].proc_entry) { acpi_sbs_generic_remove_fs(&(sbs->battery[id].proc_entry), acpi_battery_dir); } } static int acpi_ac_add(struct acpi_sbs *sbs) { int result; result = acpi_ac_get_present(sbs); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_get_present() failed")); goto end; } result = acpi_sbs_generic_add_fs(&sbs->ac_entry, acpi_ac_dir, ACPI_AC_DIR_NAME, NULL, &acpi_ac_state_fops, NULL, sbs); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_generic_add_fs() failed")); goto end; } 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_ac_remove(struct acpi_sbs *sbs) { if (sbs->ac_entry) { acpi_sbs_generic_remove_fs(&sbs->ac_entry, acpi_ac_dir); } } static void acpi_sbs_update_time_run(unsigned long data) { acpi_os_execute(OSL_GPE_HANDLER, acpi_sbs_update_time, (void *)data); } static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type) { struct acpi_battery *battery; int result = 0, cnt; int old_ac_present = -1; int old_present = -1; int new_ac_present = -1; int new_present = -1; int id_min = 0, id_max = MAX_SBS_BAT - 1; char dir_name[32]; int do_battery_init = 0, do_ac_init = 0; int old_remaining_capacity = 0; int update_battery = 1; int up_tm = update_time; if (sbs_zombie(sbs)) { goto end; } if (id >= 0) { id_min = id_max = id; } if (data_type == DATA_TYPE_COMMON && up_tm > 0) { cnt = up_tm / (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm); if (sbs->run_cnt % cnt != 0) { update_battery = 0; } } sbs->run_cnt++; if (!update_battery) { goto end; } old_ac_present = sbs->charger_present; result = acpi_ac_get_present(sbs); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_get_present() failed")); } new_ac_present = sbs->charger_present; do_ac_init = (old_ac_present != new_ac_present); if (sbs->run_cnt == 1 && data_type == DATA_TYPE_COMMON) { do_ac_init = 1; } if (do_ac_init) { result = acpi_bus_generate_proc_event4(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, ACPI_SBS_AC_NOTIFY_STATUS, new_ac_present); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_bus_generate_event4() failed")); } acpi_bus_generate_netlink_event(ACPI_AC_CLASS, ACPI_AC_DIR_NAME, ACPI_SBS_AC_NOTIFY_STATUS, new_ac_present); } if (data_type == DATA_TYPE_COMMON) { if (!do_ac_init && !update_battery) { goto end; } } if (data_type == DATA_TYPE_AC_STATE && !do_ac_init) { goto end; } for (id = id_min; id <= id_max; id++) { battery = &sbs->battery[id]; if (battery->alive == 0) { continue; } old_remaining_capacity = battery->capacity_now; old_present = battery->present; result = acpi_battery_select(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_select() failed")); } result = acpi_battery_get_present(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_present() failed")); } new_present = battery->present; do_battery_init = ((old_present != new_present) && new_present); if (!new_present) goto event; if (do_ac_init || do_battery_init) { result = acpi_battery_init(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_init() " "failed")); } } if (sbs_zombie(sbs)) { goto end; } if ((data_type == DATA_TYPE_COMMON || data_type == DATA_TYPE_INFO) && new_present) { result = acpi_battery_get_info(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_info() failed")); } } if (data_type == DATA_TYPE_INFO) { continue; } if (sbs_zombie(sbs)) { goto end; } if ((data_type == DATA_TYPE_COMMON || data_type == DATA_TYPE_STATE) && new_present) { result = acpi_battery_get_state(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_state() failed")); } } if (data_type == DATA_TYPE_STATE) { goto event; } if (sbs_zombie(sbs)) { goto end; } if ((data_type == DATA_TYPE_COMMON || data_type == DATA_TYPE_ALARM) && new_present) { result = acpi_battery_get_alarm(battery); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_get_alarm() " "failed")); } } if (data_type == DATA_TYPE_ALARM) { continue; } if (sbs_zombie(sbs)) { goto end; } event: if (old_present != new_present || do_ac_init || old_remaining_capacity != battery->capacity_now) { sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id); result = acpi_bus_generate_proc_event4(ACPI_BATTERY_CLASS, dir_name, ACPI_SBS_BATTERY_NOTIFY_STATUS, new_present); acpi_bus_generate_netlink_event(ACPI_BATTERY_CLASS, dir_name, ACPI_SBS_BATTERY_NOTIFY_STATUS, new_present); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_bus_generate_proc_event4() " "failed")); } } } end: return result; } static void acpi_sbs_update_time(void *data) { struct acpi_sbs *sbs = data; unsigned long delay = -1; int result; unsigned int up_tm = update_time; if (sbs_mutex_lock(sbs)) return; result = acpi_sbs_update_run(sbs, -1, DATA_TYPE_COMMON); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_update_run() failed")); } if (sbs_zombie(sbs)) { goto end; } if (!up_tm) { if (timer_pending(&sbs->update_timer)) del_timer(&sbs->update_timer); } else { delay = (up_tm > UPDATE_DELAY ? UPDATE_DELAY : up_tm); delay = jiffies + HZ * delay; if (timer_pending(&sbs->update_timer)) { mod_timer(&sbs->update_timer, delay); } else { sbs->update_timer.data = (unsigned long)data; sbs->update_timer.function = acpi_sbs_update_time_run; sbs->update_timer.expires = delay; add_timer(&sbs->update_timer); } } end: sbs_mutex_unlock(sbs); } static int acpi_sbs_add(struct acpi_device *device) { struct acpi_sbs *sbs = NULL; int result = 0, remove_result = 0; int id; sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); if (!sbs) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "kzalloc() failed")); result = -ENOMEM; goto end; } mutex_init(&sbs->mutex); sbs_mutex_lock(sbs); sbs->device = device; sbs->hc = acpi_driver_data(device->parent); strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_SBS_CLASS); acpi_driver_data(device) = sbs; result = acpi_ac_add(sbs); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_add() failed")); goto end; } acpi_sbsm_get_info(sbs); if (!sbs->manager_present) { result = acpi_battery_add(sbs, 0); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_add() failed")); goto end; } } else { for (id = 0; id < MAX_SBS_BAT; id++) { if ((sbs->batteries_supported & (1 << id))) { result = acpi_battery_add(sbs, id); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_battery_add() failed")); goto end; } } } } init_timer(&sbs->update_timer); result = acpi_check_update_proc(sbs); if (result) goto end; end: sbs_mutex_unlock(sbs); if (result) { remove_result = acpi_sbs_remove(device, 0); if (remove_result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_remove() failed")); } } 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; } sbs_mutex_lock(sbs); sbs->zombie = 1; del_timer_sync(&sbs->update_timer); acpi_os_wait_events_complete(NULL); del_timer_sync(&sbs->update_timer); for (id = 0; id < MAX_SBS_BAT; id++) { acpi_battery_remove(sbs, id); } acpi_ac_remove(sbs); sbs_mutex_unlock(sbs); mutex_destroy(&sbs->mutex); kfree(sbs); return 0; } static void acpi_sbs_rmdirs(void) { 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; } } static int acpi_sbs_resume(struct acpi_device *device) { struct acpi_sbs *sbs; if (!device) return -EINVAL; sbs = device->driver_data; sbs->run_cnt = 0; return 0; } static int __init acpi_sbs_init(void) { int result = 0; if (acpi_disabled) return -ENODEV; if (mode != DEF_CAPACITY_UNIT && mode != MAH_CAPACITY_UNIT && mode != MWH_CAPACITY_UNIT) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "invalid mode = %d", mode)); return -EINVAL; } acpi_ac_dir = acpi_lock_ac_dir(); if (!acpi_ac_dir) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_lock_ac_dir() failed")); return -ENODEV; } acpi_battery_dir = acpi_lock_battery_dir(); if (!acpi_battery_dir) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_lock_battery_dir() failed")); acpi_sbs_rmdirs(); return -ENODEV; } result = acpi_bus_register_driver(&acpi_sbs_driver); if (result < 0) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_bus_register_driver() failed")); 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);