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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [acpi/] [sbs.c] - Blame information for rev 78

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/*
 *  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, .owner = THIS_MODULE},
        .show = acpi_battery_alarm_show,
        .store = acpi_battery_alarm_store,
};
#endif
 
/* --------------------------------------------------------------------------
                              FS Interface (/proc/acpi)
   -------------------------------------------------------------------------- */
 
#ifdef CONFIG_ACPI_PROCFS_POWER
/* Generic Routines */
static 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)
{
        struct proc_dir_entry *entry = NULL;
 
        if (!*dir) {
                *dir = proc_mkdir(dir_name, parent_dir);
                if (!*dir) {
                        return -ENODEV;
                }
                (*dir)->owner = THIS_MODULE;
        }
 
        /* 'info' [R] */
        if (info_fops) {
                entry = create_proc_entry(ACPI_SBS_FILE_INFO, S_IRUGO, *dir);
                if (entry) {
                        entry->proc_fops = info_fops;
                        entry->data = data;
                        entry->owner = THIS_MODULE;
                }
        }
 
        /* 'state' [R] */
        if (state_fops) {
                entry = create_proc_entry(ACPI_SBS_FILE_STATE, S_IRUGO, *dir);
                if (entry) {
                        entry->proc_fops = state_fops;
                        entry->data = data;
                        entry->owner = THIS_MODULE;
                }
        }
 
        /* 'alarm' [R/W] */
        if (alarm_fops) {
                entry = create_proc_entry(ACPI_SBS_FILE_ALARM, S_IRUGO, *dir);
                if (entry) {
                        entry->proc_fops = alarm_fops;
                        entry->data = data;
                        entry->owner = THIS_MODULE;
                }
        }
        return 0;
}
 
static 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, sbs->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
}
 
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);
        acpi_driver_data(device) = 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);
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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [acpi/] [sbs.c] - Blame information for rev 78

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)`
3			`*`
4			`* Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>`
5			`* Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>`
6			`* Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>`
7			`*`
8			`* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
9			`*`
10			`* This program is free software; you can redistribute it and/or modify`
11			`* it under the terms of the GNU General Public License as published by`
12			`* the Free Software Foundation; either version 2 of the License, or (at`
13			`* your option) any later version.`
14			`*`
15			`* This program is distributed in the hope that it will be useful, but`
16			`* WITHOUT ANY WARRANTY; without even the implied warranty of`
17			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
18			`* General Public License for more details.`
19			`*`
20			`* You should have received a copy of the GNU General Public License along`
21			`* with this program; if not, write to the Free Software Foundation, Inc.,`
22			`* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.`
23			`*`
24			`* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
25			`*/`
26
27			`#include <linux/init.h>`
28			`#include <linux/module.h>`
29			`#include <linux/moduleparam.h>`
30			`#include <linux/kernel.h>`
31
32			`#ifdef CONFIG_ACPI_PROCFS_POWER`
33			`#include <linux/proc_fs.h>`
34			`#include <linux/seq_file.h>`
35			`#include <asm/uaccess.h>`
36			`#endif`
37
38			`#include <linux/acpi.h>`
39			`#include <linux/timer.h>`
40			`#include <linux/jiffies.h>`