/* * acpi_sbs.c - ACPI Smart Battery System Driver ($Revision: 1.16 $) * * 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> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <asm/uaccess.h> #include <linux/acpi.h> #include <linux/timer.h> #include <linux/jiffies.h> #include <linux/delay.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 xmsleep(t) msleep(t) #define ACPI_EC_SMB_PRTCL 0x00 /* protocol, PEC */ #define ACPI_EC_SMB_STS 0x01 /* status */ #define ACPI_EC_SMB_ADDR 0x02 /* address */ #define ACPI_EC_SMB_CMD 0x03 /* command */ #define ACPI_EC_SMB_DATA 0x04 /* 32 data registers */ #define ACPI_EC_SMB_BCNT 0x24 /* number of data bytes */ #define ACPI_EC_SMB_STS_DONE 0x80 #define ACPI_EC_SMB_STS_STATUS 0x1f #define ACPI_EC_SMB_PRTCL_WRITE 0x00 #define ACPI_EC_SMB_PRTCL_READ 0x01 #define ACPI_EC_SMB_PRTCL_WORD_DATA 0x08 #define ACPI_EC_SMB_PRTCL_BLOCK_DATA 0x0a #define ACPI_EC_SMB_TRANSACTION_SLEEP 1 #define ACPI_EC_SMB_ACCESS_SLEEP1 1 #define ACPI_EC_SMB_ACCESS_SLEEP2 10 #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 ACPI_SBS_SMBUS_READ 1 #define ACPI_SBS_SMBUS_WRITE 2 #define ACPI_SBS_WORD_DATA 1 #define ACPI_SBS_BLOCK_DATA 2 #define UPDATE_DELAY 10 /* 0 - every time, > 0 - by update_time */ static unsigned int update_time = 120; static unsigned int capacity_mode = CAPACITY_UNIT; module_param(update_time, uint, 0644); module_param(capacity_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[] = { {"ACPI0001", 0}, {"ACPI0005", 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_ac { int ac_present; }; struct acpi_battery_info { int capacity_mode; s16 full_charge_capacity; s16 design_capacity; s16 design_voltage; int vscale; int ipscale; s16 serial_number; char manufacturer_name[ACPI_SBS_BLOCK_MAX + 3]; char device_name[ACPI_SBS_BLOCK_MAX + 3]; char device_chemistry[ACPI_SBS_BLOCK_MAX + 3]; }; struct acpi_battery_state { s16 voltage; s16 amperage; s16 remaining_capacity; s16 battery_state; }; struct acpi_battery_alarm { s16 remaining_capacity; }; struct acpi_battery { int alive; int id; int init_state; int battery_present; struct acpi_sbs *sbs; struct acpi_battery_info info; struct acpi_battery_state state; struct acpi_battery_alarm alarm; struct proc_dir_entry *battery_entry; }; struct acpi_sbs { int base; struct acpi_device *device; struct mutex mutex; int sbsm_present; int sbsm_batteries_supported; struct proc_dir_entry *ac_entry; struct acpi_ac ac; struct acpi_battery battery[MAX_SBS_BAT]; int zombie; struct timer_list update_timer; int run_cnt; int update_proc_flg; }; static int acpi_sbs_update_run(struct acpi_sbs *sbs, int id, int data_type); static void acpi_sbs_update_time(void *data); union sbs_rw_data { u16 word; u8 block[ACPI_SBS_BLOCK_MAX + 2]; }; static int acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr, char read_write, u8 command, int size, union sbs_rw_data *data); /* -------------------------------------------------------------------------- SMBus Communication -------------------------------------------------------------------------- */ static int acpi_ec_sbs_read(struct acpi_sbs *sbs, u8 address, u8 * data) { u8 val; int err; err = ec_read(sbs->base + address, &val); if (!err) { *data = val; } xmsleep(ACPI_EC_SMB_TRANSACTION_SLEEP); return (err); } static int acpi_ec_sbs_write(struct acpi_sbs *sbs, u8 address, u8 data) { int err; err = ec_write(sbs->base + address, data); return (err); } static int acpi_ec_sbs_access(struct acpi_sbs *sbs, u16 addr, char read_write, u8 command, int size, union sbs_rw_data *data) { unsigned char protocol, len = 0, temp[2] = { 0, 0 }; int i; if (read_write == ACPI_SBS_SMBUS_READ) { protocol = ACPI_EC_SMB_PRTCL_READ; } else { protocol = ACPI_EC_SMB_PRTCL_WRITE; } switch (size) { case ACPI_SBS_WORD_DATA: acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command); if (read_write == ACPI_SBS_SMBUS_WRITE) { acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA, data->word); acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + 1, data->word >> 8); } protocol |= ACPI_EC_SMB_PRTCL_WORD_DATA; break; case ACPI_SBS_BLOCK_DATA: acpi_ec_sbs_write(sbs, ACPI_EC_SMB_CMD, command); if (read_write == ACPI_SBS_SMBUS_WRITE) { len = min_t(u8, data->block[0], 32); acpi_ec_sbs_write(sbs, ACPI_EC_SMB_BCNT, len); for (i = 0; i < len; i++) acpi_ec_sbs_write(sbs, ACPI_EC_SMB_DATA + i, data->block[i + 1]); } protocol |= ACPI_EC_SMB_PRTCL_BLOCK_DATA; break; default: ACPI_EXCEPTION((AE_INFO, AE_ERROR, "unsupported transaction %d", size)); return (-1); } acpi_ec_sbs_write(sbs, ACPI_EC_SMB_ADDR, addr << 1); acpi_ec_sbs_write(sbs, ACPI_EC_SMB_PRTCL, protocol); acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp); if (~temp[0] & ACPI_EC_SMB_STS_DONE) { xmsleep(ACPI_EC_SMB_ACCESS_SLEEP1); acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp); } if (~temp[0] & ACPI_EC_SMB_STS_DONE) { xmsleep(ACPI_EC_SMB_ACCESS_SLEEP2); acpi_ec_sbs_read(sbs, ACPI_EC_SMB_STS, temp); } if ((~temp[0] & ACPI_EC_SMB_STS_DONE) || (temp[0] & ACPI_EC_SMB_STS_STATUS)) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "transaction %d error", size)); return (-1); } if (read_write == ACPI_SBS_SMBUS_WRITE) { return (0); } switch (size) { case ACPI_SBS_WORD_DATA: acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA, temp); acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + 1, temp + 1); data->word = (temp[1] << 8) | temp[0]; break; case ACPI_SBS_BLOCK_DATA: len = 0; acpi_ec_sbs_read(sbs, ACPI_EC_SMB_BCNT, &len); len = min_t(u8, len, 32); for (i = 0; i < len; i++) acpi_ec_sbs_read(sbs, ACPI_EC_SMB_DATA + i, data->block + i + 1); data->block[0] = len; break; default: ACPI_EXCEPTION((AE_INFO, AE_ERROR, "unsupported transaction %d", size)); return (-1); } return (0); } static int acpi_sbs_read_word(struct acpi_sbs *sbs, int addr, int func, u16 * word) { union sbs_rw_data data; int result = 0; result = acpi_ec_sbs_access(sbs, addr, ACPI_SBS_SMBUS_READ, func, ACPI_SBS_WORD_DATA, &data); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ec_sbs_access() failed")); } else { *word = data.word; } return result; } static int acpi_sbs_read_str(struct acpi_sbs *sbs, int addr, int func, char *str) { union sbs_rw_data data; int result = 0; result = acpi_ec_sbs_access(sbs, addr, ACPI_SBS_SMBUS_READ, func, ACPI_SBS_BLOCK_DATA, &data); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ec_sbs_access() failed")); } else { strncpy(str, (const char *)data.block + 1, data.block[0]); str[data.block[0]] = 0; } return result; } static int acpi_sbs_write_word(struct acpi_sbs *sbs, int addr, int func, int word) { union sbs_rw_data data; int result = 0; data.word = word; result = acpi_ec_sbs_access(sbs, addr, ACPI_SBS_SMBUS_WRITE, func, ACPI_SBS_WORD_DATA, &data); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ec_sbs_access() failed")); } return result; } 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_sbs_generate_event(struct acpi_device *device, int event, int state, char *bid, char *class) { char bid_saved[5]; char class_saved[20]; int result = 0; strcpy(bid_saved, acpi_device_bid(device)); strcpy(class_saved, acpi_device_class(device)); strcpy(acpi_device_bid(device), bid); strcpy(acpi_device_class(device), class); result = acpi_bus_generate_proc_event(device, event, state); strcpy(acpi_device_bid(device), bid_saved); strcpy(acpi_device_class(device), class_saved); acpi_bus_generate_netlink_event(class, bid, event, state); return result; } static int acpi_battery_get_present(struct acpi_battery *battery) { s16 state; int result = 0; int is_present = 0; result = acpi_sbs_read_word(battery->sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); } if (!result) { is_present = (state & 0x000f) & (1 << battery->id); } battery->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->sbsm_present) { /* Take special care not to knobble other nibbles of * state (aka selector_state), since * it causes charging to halt on SBSELs */ result = acpi_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, &state); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } foo = (state & 0x0fff) | (1 << (battery->id + 12)); result = acpi_sbs_write_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x01, foo); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_write_word() 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_sbs_read_word(sbs, ACPI_SBSM_SMBUS_ADDR, 0x04, &battery_system_info); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } sbs->sbsm_present = 1; sbs->sbsm_batteries_supported = battery_system_info & 0x000f; end: return result; } static int acpi_battery_get_info(struct acpi_battery *battery) { struct acpi_sbs *sbs = battery->sbs; int result = 0; s16 battery_mode; s16 specification_info; result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } battery->info.capacity_mode = (battery_mode & 0x8000) >> 15; result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x10, &battery->info.full_charge_capacity); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x18, &battery->info.design_capacity); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x19, &battery->info.design_voltage); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1a, &specification_info); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } switch ((specification_info & 0x0f00) >> 8) { case 1: battery->info.vscale = 10; break; case 2: battery->info.vscale = 100; break; case 3: battery->info.vscale = 1000; break; default: battery->info.vscale = 1; } switch ((specification_info & 0xf000) >> 12) { case 1: battery->info.ipscale = 10; break; case 2: battery->info.ipscale = 100; break; case 3: battery->info.ipscale = 1000; break; default: battery->info.ipscale = 1; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x1c, &battery->info.serial_number); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x20, battery->info.manufacturer_name); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_str() failed")); goto end; } result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x21, battery->info.device_name); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_str() failed")); goto end; } result = acpi_sbs_read_str(sbs, ACPI_SB_SMBUS_ADDR, 0x22, battery->info.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) { struct acpi_sbs *sbs = battery->sbs; int result = 0; result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x09, &battery->state.voltage); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0a, &battery->state.amperage); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x0f, &battery->state.remaining_capacity); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x16, &battery->state.battery_state); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } end: return result; } static int acpi_battery_get_alarm(struct acpi_battery *battery) { struct acpi_sbs *sbs = battery->sbs; int result = 0; result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, &battery->alarm.remaining_capacity); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } end: return result; } static int acpi_battery_set_alarm(struct acpi_battery *battery, unsigned long alarm) { struct acpi_sbs *sbs = battery->sbs; 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_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, battery_mode & 0xbfff); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_write_word() failed")); goto end; } } foo = alarm / (battery->info.capacity_mode ? 10 : 1); result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x01, foo); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_write_word() failed")); goto end; } end: return result; } static int acpi_battery_set_mode(struct acpi_battery *battery) { struct acpi_sbs *sbs = battery->sbs; int result = 0; s16 battery_mode; if (capacity_mode == DEF_CAPACITY_UNIT) { goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } if (capacity_mode == MAH_CAPACITY_UNIT) { battery_mode &= 0x7fff; } else { battery_mode |= 0x8000; } result = acpi_sbs_write_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03, battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_write_word() failed")); goto end; } result = acpi_sbs_read_word(sbs, ACPI_SB_SMBUS_ADDR, 0x03, &battery_mode); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() 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_sbs_read_word(sbs, ACPI_SBC_SMBUS_ADDR, 0x13, &charger_status); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_read_word() failed")); goto end; } sbs->ac.ac_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->battery_present) { seq_printf(seq, "present: yes\n"); } else { seq_printf(seq, "present: no\n"); goto end; } if (battery->info.capacity_mode) { cscale = battery->info.vscale * battery->info.ipscale; } else { cscale = battery->info.ipscale; } seq_printf(seq, "design capacity: %i%s\n", battery->info.design_capacity * cscale, battery->info.capacity_mode ? "0 mWh" : " mAh"); seq_printf(seq, "last full capacity: %i%s\n", battery->info.full_charge_capacity * cscale, battery->info.capacity_mode ? "0 mWh" : " mAh"); seq_printf(seq, "battery technology: rechargeable\n"); seq_printf(seq, "design voltage: %i mV\n", battery->info.design_voltage * battery->info.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->info.device_name); seq_printf(seq, "serial number: %i\n", battery->info.serial_number); seq_printf(seq, "battery type: %s\n", battery->info.device_chemistry); seq_printf(seq, "OEM info: %s\n", battery->info.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->battery_present) { seq_printf(seq, "present: yes\n"); } else { seq_printf(seq, "present: no\n"); goto end; } if (battery->info.capacity_mode) { cscale = battery->info.vscale * battery->info.ipscale; } else { cscale = battery->info.ipscale; } if (battery->state.battery_state & 0x0010) { seq_printf(seq, "capacity state: critical\n"); } else { seq_printf(seq, "capacity state: ok\n"); } foo = (s16) battery->state.amperage * battery->info.ipscale; if (battery->info.capacity_mode) { foo = foo * battery->info.design_voltage / 1000; } if (battery->state.amperage < 0) { seq_printf(seq, "charging state: discharging\n"); seq_printf(seq, "present rate: %d %s\n", -foo, battery->info.capacity_mode ? "mW" : "mA"); } else if (battery->state.amperage > 0) { seq_printf(seq, "charging state: charging\n"); seq_printf(seq, "present rate: %d %s\n", foo, battery->info.capacity_mode ? "mW" : "mA"); } else { seq_printf(seq, "charging state: charged\n"); seq_printf(seq, "present rate: 0 %s\n", battery->info.capacity_mode ? "mW" : "mA"); } seq_printf(seq, "remaining capacity: %i%s\n", battery->state.remaining_capacity * cscale, battery->info.capacity_mode ? "0 mWh" : " mAh"); seq_printf(seq, "present voltage: %i mV\n", battery->state.voltage * battery->info.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->battery_present) { seq_printf(seq, "present: no\n"); goto end; } if (battery->info.capacity_mode) { cscale = battery->info.vscale * battery->info.ipscale; } else { cscale = battery->info.ipscale; } seq_printf(seq, "alarm: "); if (battery->alarm.remaining_capacity) { seq_printf(seq, "%i%s\n", battery->alarm.remaining_capacity * cscale, battery->info.capacity_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->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.remaining_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->ac.ac_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->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->battery_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->battery_present ? "present" : "absent"); end: return result; } static void acpi_battery_remove(struct acpi_sbs *sbs, int id) { if (sbs->battery[id].battery_entry) { acpi_sbs_generic_remove_fs(&(sbs->battery[id].battery_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->ac.ac_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_battery_present = -1; int new_ac_present = -1; int new_battery_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++; old_ac_present = sbs->ac.ac_present; result = acpi_ac_get_present(sbs); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_ac_get_present() failed")); } new_ac_present = sbs->ac.ac_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_sbs_generate_event(sbs->device, ACPI_SBS_AC_NOTIFY_STATUS, new_ac_present, ACPI_AC_DIR_NAME, ACPI_AC_CLASS); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_generate_event() failed")); } } 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->state.remaining_capacity; old_battery_present = battery->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_battery_present = battery->battery_present; do_battery_init = ((old_battery_present != new_battery_present) && new_battery_present); if (!new_battery_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_battery_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_battery_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_battery_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_battery_present != new_battery_present || do_ac_init || old_remaining_capacity != battery->state.remaining_capacity) { sprintf(dir_name, ACPI_BATTERY_DIR_NAME, id); result = acpi_sbs_generate_event(sbs->device, ACPI_SBS_BATTERY_NOTIFY_STATUS, new_battery_present, dir_name, ACPI_BATTERY_CLASS); if (result) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "acpi_sbs_generate_event() " "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; acpi_status status = AE_OK; unsigned long val; status = acpi_evaluate_integer(device->handle, "_EC", NULL, &val); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Error obtaining _EC")); return -EIO; } 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->base = 0xff & (val >> 8); sbs->device = device; 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->sbsm_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->sbsm_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 (capacity_mode != DEF_CAPACITY_UNIT && capacity_mode != MAH_CAPACITY_UNIT && capacity_mode != MWH_CAPACITY_UNIT) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "invalid capacity_mode = %d", capacity_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);