/*
* Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00
* series of PDAs
*
* Copyright (c) 2004-2005 Richard Purdie
*
* Based on code written by Sharp for 2.4 kernels
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/apm_bios.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/apm-emulation.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <asm/arch/pm.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/sharpsl.h>
#include <asm/hardware/sharpsl_pm.h>
/*
* Constants
*/
#define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */
#define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */
#define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */
#define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */
#define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */
#define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */
#define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */
#define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */
#define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */
#define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */
#define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */
#define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */
/*
* Prototypes
*/
static int sharpsl_off_charge_battery(void);
static int sharpsl_check_battery_temp(void);
static int sharpsl_check_battery_voltage(void);
static int sharpsl_ac_check(void);
static int sharpsl_fatal_check(void);
static int sharpsl_average_value(int ad);
static void sharpsl_average_clear(void);
static void sharpsl_charge_toggle(struct work_struct *private_);
static void sharpsl_battery_thread(struct work_struct *private_);
/*
* Variables
*/
struct sharpsl_pm_status sharpsl_pm;
DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
static int get_percentage(int voltage)
{
int i = sharpsl_pm.machinfo->bat_levels - 1;
int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0;
struct battery_thresh *thresh;
if (sharpsl_pm.charge_mode == CHRG_ON)
thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin;
else
thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac;
while (i > 0 && (voltage > thresh[i].voltage))
i--;
return thresh[i].percentage;
}
static int get_apm_status(int voltage)
{
int low_thresh, high_thresh;
if (sharpsl_pm.charge_mode == CHRG_ON) {
high_thresh = sharpsl_pm.machinfo->status_high_acin;
low_thresh = sharpsl_pm.machinfo->status_low_acin;
} else {
high_thresh = sharpsl_pm.machinfo->status_high_noac;
low_thresh = sharpsl_pm.machinfo->status_low_noac;
}
if (voltage >= high_thresh)
return APM_BATTERY_STATUS_HIGH;
if (voltage >= low_thresh)
return APM_BATTERY_STATUS_LOW;
return APM_BATTERY_STATUS_CRITICAL;
}
void sharpsl_battery_kick(void)
{
schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125));
}
EXPORT_SYMBOL(sharpsl_battery_kick);
static void sharpsl_battery_thread(struct work_struct *private_)
{
int voltage, percent, apm_status, i = 0;
if (!sharpsl_pm.machinfo)
return;
sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE);
/* Corgi cannot confirm when battery fully charged so periodically kick! */
if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON)
&& time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL))
schedule_delayed_work(&toggle_charger, 0);
while(1) {
voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
if (voltage > 0) break;
if (i++ > 5) {
voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
break;
}
}
voltage = sharpsl_average_value(voltage);
apm_status = get_apm_status(voltage);
percent = get_percentage(voltage);
/* At low battery voltages, the voltage has a tendency to start
creeping back up so we try to avoid this here */
if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) || (apm_status == APM_BATTERY_STATUS_HIGH) || percent <= sharpsl_pm.battstat.mainbat_percent) {
sharpsl_pm.battstat.mainbat_voltage = voltage;
sharpsl_pm.battstat.mainbat_status = apm_status;
sharpsl_pm.battstat.mainbat_percent = percent;
}
dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage,
sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies);
/* If battery is low. limit backlight intensity to save power. */
if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
&& ((sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_LOW) ||
(sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL))) {
if (!(sharpsl_pm.flags & SHARPSL_BL_LIMIT)) {
sharpsl_pm.machinfo->backlight_limit(1);
sharpsl_pm.flags |= SHARPSL_BL_LIMIT;
}
} else if (sharpsl_pm.flags & SHARPSL_BL_LIMIT) {
sharpsl_pm.machinfo->backlight_limit(0);
sharpsl_pm.flags &= ~SHARPSL_BL_LIMIT;
}
/* Suspend if critical battery level */
if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE)
&& (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL)
&& !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) {
sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
dev_err(sharpsl_pm.dev, "Fatal Off\n");
apm_queue_event(APM_CRITICAL_SUSPEND);
}
schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME);
}
void sharpsl_pm_led(int val)
{
if (val == SHARPSL_LED_ERROR) {
dev_err(sharpsl_pm.dev, "Charging Error!\n");
} else if (val == SHARPSL_LED_ON) {
dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
led_trigger_event(sharpsl_charge_led_trigger, LED_FULL);
} else {
dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
led_trigger_event(sharpsl_charge_led_trigger, LED_OFF);
}
}
static void sharpsl_charge_on(void)
{
dev_dbg(sharpsl_pm.dev, "Turning Charger On\n");
sharpsl_pm.full_count = 0;
sharpsl_pm.charge_mode = CHRG_ON;
schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250));
schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500));
}
static void sharpsl_charge_off(void)
{
dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n");
sharpsl_pm.machinfo->charge(0);
sharpsl_pm_led(SHARPSL_LED_OFF);
sharpsl_pm.charge_mode = CHRG_OFF;
schedule_delayed_work(&sharpsl_bat, 0);
}
static void sharpsl_charge_error(void)
{
sharpsl_pm_led(SHARPSL_LED_ERROR);
sharpsl_pm.machinfo->charge(0);
sharpsl_pm.charge_mode = CHRG_ERROR;
}
static void sharpsl_charge_toggle(struct work_struct *private_)
{
dev_dbg(sharpsl_pm.dev, "Toogling Charger at time: %lx\n", jiffies);
if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
sharpsl_charge_off();
return;
} else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) {
sharpsl_charge_error();
return;
}
sharpsl_pm_led(SHARPSL_LED_ON);
sharpsl_pm.machinfo->charge(0);
mdelay(SHARPSL_CHARGE_WAIT_TIME);
sharpsl_pm.machinfo->charge(1);
sharpsl_pm.charge_start_time = jiffies;
}
static void sharpsl_ac_timer(unsigned long data)
{
int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
dev_dbg(sharpsl_pm.dev, "AC Status: %d\n",acin);
sharpsl_average_clear();
if (acin && (sharpsl_pm.charge_mode != CHRG_ON))
sharpsl_charge_on();
else if (sharpsl_pm.charge_mode == CHRG_ON)
sharpsl_charge_off();
schedule_delayed_work(&sharpsl_bat, 0);
}
irqreturn_t sharpsl_ac_isr(int irq, void *dev_id)
{
/* Delay the event slightly to debounce */
/* Must be a smaller delay than the chrg_full_isr below */
mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
return IRQ_HANDLED;
}
static void sharpsl_chrg_full_timer(unsigned long data)
{
dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies);
sharpsl_pm.full_count++;
if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n");
if (sharpsl_pm.charge_mode == CHRG_ON)
sharpsl_charge_off();
} else if (sharpsl_pm.full_count < 2) {
dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n");
schedule_delayed_work(&toggle_charger, 0);
} else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) {
dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n");
schedule_delayed_work(&toggle_charger, 0);
} else {
sharpsl_charge_off();
sharpsl_pm.charge_mode = CHRG_DONE;
dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n");
}
}
/* Charging Finished Interrupt (Not present on Corgi) */
/* Can trigger at the same time as an AC status change so
delay until after that has been processed */
irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id)
{
if (sharpsl_pm.flags & SHARPSL_SUSPENDED)
return IRQ_HANDLED;
/* delay until after any ac interrupt */
mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500));
return IRQ_HANDLED;
}
irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id)
{
int is_fatal = 0;
if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) {
dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n");
is_fatal = 1;
}
if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) {
dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n");
is_fatal = 1;
}
if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) {
sharpsl_pm.flags |= SHARPSL_APM_QUEUED;
apm_queue_event(APM_CRITICAL_SUSPEND);
}
return IRQ_HANDLED;
}
/*
* Maintain an average of the last 10 readings
*/
#define SHARPSL_CNV_VALUE_NUM 10
static int sharpsl_ad_index;
static void sharpsl_average_clear(void)
{
sharpsl_ad_index = 0;
}
static int sharpsl_average_value(int ad)
{
int i, ad_val = 0;
static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1];
if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) {
sharpsl_ad_index = 0;
return ad;
}
sharpsl_ad[sharpsl_ad_index] = ad;
sharpsl_ad_index++;
if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) {
for (i=0; i < (SHARPSL_CNV_VALUE_NUM-1); i++)
sharpsl_ad[i] = sharpsl_ad[i+1];
sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1;
}
for (i=0; i < sharpsl_ad_index; i++)
ad_val += sharpsl_ad[i];
return (ad_val / sharpsl_ad_index);
}
/*
* Take an array of 5 integers, remove the maximum and minimum values
* and return the average.
*/
static int get_select_val(int *val)
{
int i, j, k, temp, sum = 0;
/* Find MAX val */
temp = val[0];
j=0;
for (i=1; i<5; i++) {
if (temp < val[i]) {
temp = val[i];
j = i;
}
}
/* Find MIN val */
temp = val[4];
k=4;
for (i=3; i>=0; i--) {
if (temp > val[i]) {
temp = val[i];
k = i;
}
}
for (i=0; i<5; i++)
if (i != j && i != k )
sum += val[i];
dev_dbg(sharpsl_pm.dev, "Average: %d from values: %d, %d, %d, %d, %d\n", sum/3, val[0], val[1], val[2], val[3], val[4]);
return (sum/3);
}
static int sharpsl_check_battery_temp(void)
{
int val, i, buff[5];
/* Check battery temperature */
for (i=0; i<5; i++) {
mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
sharpsl_pm.machinfo->measure_temp(1);
mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP);
buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP);
sharpsl_pm.machinfo->measure_temp(0);
}
val = get_select_val(buff);
dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val);
if (val > sharpsl_pm.machinfo->charge_on_temp) {
printk(KERN_WARNING "Not charging: temperature out of limits.\n");
return -1;
}
return 0;
}
static int sharpsl_check_battery_voltage(void)
{
int val, i, buff[5];
/* disable charge, enable discharge */
sharpsl_pm.machinfo->charge(0);
sharpsl_pm.machinfo->discharge(1);
mdelay(SHARPSL_WAIT_DISCHARGE_ON);
if (sharpsl_pm.machinfo->discharge1)
sharpsl_pm.machinfo->discharge1(1);
/* Check battery voltage */
for (i=0; i<5; i++) {
buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
}
if (sharpsl_pm.machinfo->discharge1)
sharpsl_pm.machinfo->discharge1(0);
sharpsl_pm.machinfo->discharge(0);
val = get_select_val(buff);
dev_dbg(sharpsl_pm.dev, "Battery Voltage: %d\n", val);
if (val < sharpsl_pm.machinfo->charge_on_volt)
return -1;
return 0;
}
static int sharpsl_ac_check(void)
{
int temp, i, buff[5];
for (i=0; i<5; i++) {
buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_ACIN_VOLT);
mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN);
}
temp = get_select_val(buff);
dev_dbg(sharpsl_pm.dev, "AC Voltage: %d\n",temp);
if ((temp > sharpsl_pm.machinfo->charge_acin_high) || (temp < sharpsl_pm.machinfo->charge_acin_low)) {
dev_err(sharpsl_pm.dev, "Error: AC check failed.\n");
return -1;
}
return 0;
}
#ifdef CONFIG_PM
static int sharpsl_pm_suspend(struct platform_device *pdev, pm_message_t state)
{
sharpsl_pm.flags |= SHARPSL_SUSPENDED;
flush_scheduled_work();
if (sharpsl_pm.charge_mode == CHRG_ON)
sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
else
sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
return 0;
}
static int sharpsl_pm_resume(struct platform_device *pdev)
{
/* Clear the reset source indicators as they break the bootloader upon reboot */
RCSR = 0x0f;
sharpsl_average_clear();
sharpsl_pm.flags &= ~SHARPSL_APM_QUEUED;
sharpsl_pm.flags &= ~SHARPSL_SUSPENDED;
return 0;
}
static void corgi_goto_sleep(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
{
dev_dbg(sharpsl_pm.dev, "Time is: %08x\n",RCNR);
dev_dbg(sharpsl_pm.dev, "Offline Charge Activate = %d\n",sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG);
/* not charging and AC-IN! */
if ((sharpsl_pm.flags & SHARPSL_DO_OFFLINE_CHRG) && (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN))) {
dev_dbg(sharpsl_pm.dev, "Activating Offline Charger...\n");
sharpsl_pm.charge_mode = CHRG_OFF;
sharpsl_pm.flags &= ~SHARPSL_DO_OFFLINE_CHRG;
sharpsl_off_charge_battery();
}
sharpsl_pm.machinfo->presuspend();
PEDR = 0xffffffff; /* clear it */
sharpsl_pm.flags &= ~SHARPSL_ALARM_ACTIVE;
if ((sharpsl_pm.charge_mode == CHRG_ON) && ((alarm_enable && ((alarm_time - RCNR) > (SHARPSL_BATCHK_TIME_SUSPEND + 30))) || !alarm_enable)) {
RTSR &= RTSR_ALE;
RTAR = RCNR + SHARPSL_BATCHK_TIME_SUSPEND;
dev_dbg(sharpsl_pm.dev, "Charging alarm at: %08x\n",RTAR);
sharpsl_pm.flags |= SHARPSL_ALARM_ACTIVE;
} else if (alarm_enable) {
RTSR &= RTSR_ALE;
RTAR = alarm_time;
dev_dbg(sharpsl_pm.dev, "User alarm at: %08x\n",RTAR);
} else {
dev_dbg(sharpsl_pm.dev, "No alarms set.\n");
}
pxa_pm_enter(state);
sharpsl_pm.machinfo->postsuspend();
dev_dbg(sharpsl_pm.dev, "Corgi woken up from suspend: %08x\n",PEDR);
}
static int corgi_enter_suspend(unsigned long alarm_time, unsigned int alarm_enable, suspend_state_t state)
{
if (!sharpsl_pm.machinfo->should_wakeup(!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE) && alarm_enable) )
{
if (!(sharpsl_pm.flags & SHARPSL_ALARM_ACTIVE)) {
dev_dbg(sharpsl_pm.dev, "No user triggered wakeup events and not charging. Strange. Suspend.\n");
corgi_goto_sleep(alarm_time, alarm_enable, state);
return 1;
}
if(sharpsl_off_charge_battery()) {
dev_dbg(sharpsl_pm.dev, "Charging. Suspend...\n");
corgi_goto_sleep(alarm_time, alarm_enable, state);
return 1;
}
dev_dbg(sharpsl_pm.dev, "User triggered wakeup in offline charger.\n");
}
if ((!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) || (sharpsl_fatal_check() < 0) )
{
dev_err(sharpsl_pm.dev, "Fatal condition. Suspend.\n");
corgi_goto_sleep(alarm_time, alarm_enable, state);
return 1;
}
return 0;
}
static int corgi_pxa_pm_enter(suspend_state_t state)
{
unsigned long alarm_time = RTAR;
unsigned int alarm_status = ((RTSR & RTSR_ALE) != 0);
dev_dbg(sharpsl_pm.dev, "SharpSL suspending for first time.\n");
corgi_goto_sleep(alarm_time, alarm_status, state);
while (corgi_enter_suspend(alarm_time,alarm_status,state))
{}
if (sharpsl_pm.machinfo->earlyresume)
sharpsl_pm.machinfo->earlyresume();
dev_dbg(sharpsl_pm.dev, "SharpSL resuming...\n");
return 0;
}
#endif
/*
* Check for fatal battery errors
* Fatal returns -1
*/
static int sharpsl_fatal_check(void)
{
int buff[5], temp, i, acin;
dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check entered\n");
/* Check AC-Adapter */
acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
sharpsl_pm.machinfo->charge(0);
udelay(100);
sharpsl_pm.machinfo->discharge(1); /* enable discharge */
mdelay(SHARPSL_WAIT_DISCHARGE_ON);
}
if (sharpsl_pm.machinfo->discharge1)
sharpsl_pm.machinfo->discharge1(1);
/* Check battery : check inserting battery ? */
for (i=0; i<5; i++) {
buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT);
}
if (sharpsl_pm.machinfo->discharge1)
sharpsl_pm.machinfo->discharge1(0);
if (acin && (sharpsl_pm.charge_mode == CHRG_ON)) {
udelay(100);
sharpsl_pm.machinfo->charge(1);
sharpsl_pm.machinfo->discharge(0);
}
temp = get_select_val(buff);
dev_dbg(sharpsl_pm.dev, "sharpsl_fatal_check: acin: %d, discharge voltage: %d, no discharge: %ld\n", acin, temp, sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT));
if ((acin && (temp < sharpsl_pm.machinfo->fatal_acin_volt)) ||
(!acin && (temp < sharpsl_pm.machinfo->fatal_noacin_volt)))
return -1;
return 0;
}
static int sharpsl_off_charge_error(void)
{
dev_err(sharpsl_pm.dev, "Offline Charger: Error occurred.\n");
sharpsl_pm.machinfo->charge(0);
sharpsl_pm_led(SHARPSL_LED_ERROR);
sharpsl_pm.charge_mode = CHRG_ERROR;
return 1;
}
/*
* Charging Control while suspended
* Return 1 - go straight to sleep
* Return 0 - sleep or wakeup depending on other factors
*/
static int sharpsl_off_charge_battery(void)
{
int time;
dev_dbg(sharpsl_pm.dev, "Charge Mode: %d\n", sharpsl_pm.charge_mode);
if (sharpsl_pm.charge_mode == CHRG_OFF) {
dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 1\n");
/* AC Check */
if ((sharpsl_ac_check() < 0) || (sharpsl_check_battery_temp() < 0))
return sharpsl_off_charge_error();
/* Start Charging */
sharpsl_pm_led(SHARPSL_LED_ON);
sharpsl_pm.machinfo->charge(0);
mdelay(SHARPSL_CHARGE_WAIT_TIME);
sharpsl_pm.machinfo->charge(1);
sharpsl_pm.charge_mode = CHRG_ON;
sharpsl_pm.full_count = 0;
return 1;
} else if (sharpsl_pm.charge_mode != CHRG_ON) {
return 1;
}
if (sharpsl_pm.full_count == 0) {
int time;
dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 2\n");
if ((sharpsl_check_battery_temp() < 0) || (sharpsl_check_battery_voltage() < 0))
return sharpsl_off_charge_error();
sharpsl_pm.machinfo->charge(0);
mdelay(SHARPSL_CHARGE_WAIT_TIME);
sharpsl_pm.machinfo->charge(1);
sharpsl_pm.charge_mode = CHRG_ON;
mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
time = RCNR;
while(1) {
/* Check if any wakeup event had occurred */
if (sharpsl_pm.machinfo->charger_wakeup() != 0)
return 0;
/* Check for timeout */
if ((RCNR - time) > SHARPSL_WAIT_CO_TIME)
return 1;
if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
dev_dbg(sharpsl_pm.dev, "Offline Charger: Charge full occurred. Retrying to check\n");
sharpsl_pm.full_count++;
sharpsl_pm.machinfo->charge(0);
mdelay(SHARPSL_CHARGE_WAIT_TIME);
sharpsl_pm.machinfo->charge(1);
return 1;
}
}
}
dev_dbg(sharpsl_pm.dev, "Offline Charger: Step 3\n");
mdelay(SHARPSL_CHARGE_CO_CHECK_TIME);
time = RCNR;
while(1) {
/* Check if any wakeup event had occurred */
if (sharpsl_pm.machinfo->charger_wakeup() != 0)
return 0;
/* Check for timeout */
if ((RCNR-time) > SHARPSL_WAIT_CO_TIME) {
if (sharpsl_pm.full_count > SHARPSL_CHARGE_RETRY_CNT) {
dev_dbg(sharpsl_pm.dev, "Offline Charger: Not charged sufficiently. Retrying.\n");
sharpsl_pm.full_count = 0;
}
sharpsl_pm.full_count++;
return 1;
}
if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_CHRGFULL)) {
dev_dbg(sharpsl_pm.dev, "Offline Charger: Charging complete.\n");
sharpsl_pm_led(SHARPSL_LED_OFF);
sharpsl_pm.machinfo->charge(0);
sharpsl_pm.charge_mode = CHRG_DONE;
return 1;
}
}
}
static ssize_t battery_percentage_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_percent);
}
static ssize_t battery_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n",sharpsl_pm.battstat.mainbat_voltage);
}
static DEVICE_ATTR(battery_percentage, 0444, battery_percentage_show, NULL);
static DEVICE_ATTR(battery_voltage, 0444, battery_voltage_show, NULL);
extern void (*apm_get_power_status)(struct apm_power_info *);
static void sharpsl_apm_get_power_status(struct apm_power_info *info)
{
info->ac_line_status = sharpsl_pm.battstat.ac_status;
if (sharpsl_pm.charge_mode == CHRG_ON)
info->battery_status = APM_BATTERY_STATUS_CHARGING;
else
info->battery_status = sharpsl_pm.battstat.mainbat_status;
info->battery_flag = (1 << info->battery_status);
info->battery_life = sharpsl_pm.battstat.mainbat_percent;
}
static struct pm_ops sharpsl_pm_ops = {
.prepare = pxa_pm_prepare,
.enter = corgi_pxa_pm_enter,
.finish = pxa_pm_finish,
.valid = pm_valid_only_mem,
};
static int __init sharpsl_pm_probe(struct platform_device *pdev)
{
int ret;
if (!pdev->dev.platform_data)
return -EINVAL;
sharpsl_pm.dev = &pdev->dev;
sharpsl_pm.machinfo = pdev->dev.platform_data;
sharpsl_pm.charge_mode = CHRG_OFF;
sharpsl_pm.flags = 0;
init_timer(&sharpsl_pm.ac_timer);
sharpsl_pm.ac_timer.function = sharpsl_ac_timer;
init_timer(&sharpsl_pm.chrg_full_timer);
sharpsl_pm.chrg_full_timer.function = sharpsl_chrg_full_timer;
led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
sharpsl_pm.machinfo->init();
ret = device_create_file(&pdev->dev, &dev_attr_battery_percentage);
ret |= device_create_file(&pdev->dev, &dev_attr_battery_voltage);
if (ret != 0)
dev_warn(&pdev->dev, "Failed to register attributes (%d)\n", ret);
apm_get_power_status = sharpsl_apm_get_power_status;
pm_set_ops(&sharpsl_pm_ops);
mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
return 0;
}
static int sharpsl_pm_remove(struct platform_device *pdev)
{
pm_set_ops(NULL);
device_remove_file(&pdev->dev, &dev_attr_battery_percentage);
device_remove_file(&pdev->dev, &dev_attr_battery_voltage);
led_trigger_unregister_simple(sharpsl_charge_led_trigger);
sharpsl_pm.machinfo->exit();
del_timer_sync(&sharpsl_pm.chrg_full_timer);
del_timer_sync(&sharpsl_pm.ac_timer);
return 0;
}
static struct platform_driver sharpsl_pm_driver = {
.probe = sharpsl_pm_probe,
.remove = sharpsl_pm_remove,
.suspend = sharpsl_pm_suspend,
.resume = sharpsl_pm_resume,
.driver = {
.name = "sharpsl-pm",
},
};
static int __devinit sharpsl_pm_init(void)
{
return platform_driver_register(&sharpsl_pm_driver);
}
static void sharpsl_pm_exit(void)
{
platform_driver_unregister(&sharpsl_pm_driver);
}
late_initcall(sharpsl_pm_init);
module_exit(sharpsl_pm_exit);
