// SPDX-License-Identifier: GPL-2.0-only
/*
* 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
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/apm-emulation.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/suspend.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <asm/mach-types.h>
#include "pm.h"
#include "pxa2xx-regs.h"
#include "regs-rtc.h"
#include "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
*/
#ifdef CONFIG_PM
static int sharpsl_off_charge_battery(void);
static int sharpsl_check_battery_voltage(void);
#endif
static int sharpsl_check_battery_temp(void);
static int sharpsl_ac_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;
static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
struct battery_thresh sharpsl_battery_levels_acin[] = {
{ 213, 100},
{ 212, 98},
{ 211, 95},
{ 210, 93},
{ 209, 90},
{ 208, 88},
{ 207, 85},
{ 206, 83},
{ 205, 80},
{ 204, 78},
{ 203, 75},
{ 202, 73},
{ 201, 70},
{ 200, 68},
{ 199, 65},
{ 198, 63},
{ 197, 60},
{ 196, 58},
{ 195, 55},
{ 194, 53},
{ 193, 50},
{ 192, 48},
{ 192, 45},
{ 191, 43},
{ 191, 40},
{ 190, 38},
{ 190, 35},
{ 189, 33},
{ 188, 30},
{ 187, 28},
{ 186, 25},
{ 185, 23},
{ 184, 20},
{ 183, 18},
{ 182, 15},
{ 181, 13},
{ 180, 10},
{ 179, 8},
{ 178, 5},
{ 0, 0},
};
struct battery_thresh sharpsl_battery_levels_noac[] = {
{ 213, 100},
{ 212, 98},
{ 211, 95},
{ 210, 93},
{ 209, 90},
{ 208, 88},
{ 207, 85},
{ 206, 83},
{ 205, 80},
{ 204, 78},
{ 203, 75},
{ 202, 73},
{ 201, 70},
{ 200, 68},
{ 199, 65},
{ 198, 63},
{ 197, 60},
{ 196, 58},
{ 195, 55},
{ 194, 53},
{ 193, 50},
{ 192, 48},
{ 191, 45},
{ 190, 43},
{ 189, 40},
{ 188, 38},
{ 187, 35},
{ 186, 33},
{ 185, 30},
{ 184, 28},
{ 183, 25},
{ 182, 23},
{ 181, 20},
{ 180, 18},
{ 179, 15},
{ 178, 13},
{ 177, 10},
{ 176, 8},
{ 175, 5},
{ 0, 0},
};
/* MAX1111 Commands */
#define MAXCTRL_PD0 (1u << 0)
#define MAXCTRL_PD1 (1u << 1)
#define MAXCTRL_SGL (1u << 2)
#define MAXCTRL_UNI (1u << 3)
#define MAXCTRL_SEL_SH 4
#define MAXCTRL_STR (1u << 7)
extern int max1111_read_channel(int);
/*
* Read MAX1111 ADC
*/
int sharpsl_pm_pxa_read_max1111(int channel)
{
/* max1111 accepts channels from 0-3, however,
* it is encoded from 0-7 here in the code.
*/
return max1111_read_channel(channel >> 1);
}
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));
}
static void sharpsl_battery_thread(struct work_struct *private_)
{
int voltage, percent, apm_status, i;
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);
for (i = 0; i < 5; i++) {
voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT);
if (voltage > 0)
break;
}
if (voltage <= 0) {
voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage;
dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n");
}
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);
/* 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, "Toggling 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(struct timer_list *unused)
{
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);
}
static 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(struct timer_list *unused)
{
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 */
static 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;
}
static 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;
}
#ifdef CONFIG_PM
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;
}
#endif
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: voltage %d.\n", temp);
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_delayed_work(&toggle_charger);
flush_delayed_work(&sharpsl_bat);
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_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL))) {
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;
}
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())
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())
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;
}
}
}
#else
#define sharpsl_pm_suspend NULL
#define sharpsl_pm_resume NULL
#endif
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_RO(battery_percentage);
static DEVICE_ATTR_RO(battery_voltage);
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;
}
#ifdef CONFIG_PM
static const struct platform_suspend_ops sharpsl_pm_ops = {
.prepare = pxa_pm_prepare,
.finish = pxa_pm_finish,
.enter = corgi_pxa_pm_enter,
.valid = suspend_valid_only_mem,
};
#endif
static int sharpsl_pm_probe(struct platform_device *pdev)
{
int ret, irq;
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;
timer_setup(&sharpsl_pm.ac_timer, sharpsl_ac_timer, 0);
timer_setup(&sharpsl_pm.chrg_full_timer, sharpsl_chrg_full_timer, 0);
led_trigger_register_simple("sharpsl-charge", &sharpsl_charge_led_trigger);
sharpsl_pm.machinfo->init();
gpio_request(sharpsl_pm.machinfo->gpio_acin, "AC IN");
gpio_direction_input(sharpsl_pm.machinfo->gpio_acin);
gpio_request(sharpsl_pm.machinfo->gpio_batfull, "Battery Full");
gpio_direction_input(sharpsl_pm.machinfo->gpio_batfull);
gpio_request(sharpsl_pm.machinfo->gpio_batlock, "Battery Lock");
gpio_direction_input(sharpsl_pm.machinfo->gpio_batlock);
/* Register interrupt handlers */
irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_acin);
if (request_irq(irq, sharpsl_ac_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) {
dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
}
irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock);
if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) {
dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
}
if (sharpsl_pm.machinfo->gpio_fatal) {
irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal);
if (request_irq(irq, sharpsl_fatal_isr, IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) {
dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
}
}
if (sharpsl_pm.machinfo->batfull_irq) {
/* Register interrupt handler. */
irq = gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull);
if (request_irq(irq, sharpsl_chrg_full_isr, IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) {
dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", irq);
}
}
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;
#ifdef CONFIG_PM
suspend_set_ops(&sharpsl_pm_ops);
#endif
mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
return 0;
}
static void sharpsl_pm_remove(struct platform_device *pdev)
{
suspend_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);
free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr);
free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr);
if (sharpsl_pm.machinfo->gpio_fatal)
free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr);
if (sharpsl_pm.machinfo->batfull_irq)
free_irq(gpio_to_irq(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
gpio_free(sharpsl_pm.machinfo->gpio_batlock);
gpio_free(sharpsl_pm.machinfo->gpio_batfull);
gpio_free(sharpsl_pm.machinfo->gpio_acin);
if (sharpsl_pm.machinfo->exit)
sharpsl_pm.machinfo->exit();
del_timer_sync(&sharpsl_pm.chrg_full_timer);
del_timer_sync(&sharpsl_pm.ac_timer);
}
static struct platform_driver sharpsl_pm_driver = {
.probe = sharpsl_pm_probe,
.remove_new = sharpsl_pm_remove,
.suspend = sharpsl_pm_suspend,
.resume = sharpsl_pm_resume,
.driver = {
.name = "sharpsl-pm",
},
};
static int 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);