[ARM] pxa/sharpsl_pm: merge the two sharpsl_pm.c since it's now pxa specific

collie_pm was the only non-PXA user of sharpsl_pm. Now as it's gone we
can merge code into one single file to allow further cleanup.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>

1 files changed, 833 insertions, 1 deletions

diff --git a/arch/arm/mach-pxa/sharpsl_pm.c b/arch/arm/mach-pxa/sharpsl_pm.c
index 16b4ec67e3b6..9d61c4916968 100644
--- a/arch/arm/mach-pxa/sharpsl_pm.c
+++ b/arch/arm/mach-pxa/sharpsl_pm.c
@@ -21,13 +21,63 @@
 #include <linux/irq.h>
 #include <linux/platform_device.h>
 #include <linux/apm-emulation.h>
+#include <linux/timer.h>
+#include <linux/apm_bios.h>
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/suspend.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 #include <mach/pm.h>
+#include <mach/pxa2xx-regs.h>
 #include <mach/pxa2xx-gpio.h>
+#include <mach/regs-rtc.h>
 #include <mach/sharpsl.h>
-#include "sharpsl.h"
+#include <mach/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);
+static int sharpsl_fatal_check(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;
+DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle);
+DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread);
+DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger);
+
+
 
 struct battery_thresh spitz_battery_levels_acin[] = {
         { 213, 100},
@@ -189,3 +239,785 @@ void sharpsl_pm_pxa_remove(void)
         if (sharpsl_pm.machinfo->batfull_irq)
                 free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr);
 }
+
+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);
+
+#ifdef CONFIG_BACKLIGHT_CORGI
+        /* 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;
+        }
+#endif
+
+        /* 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;
+}
+
+#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.\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;
+}
+
+/*
+ * 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;
+                }
+        }
+}
+#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(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;
+}
+
+#ifdef CONFIG_PM
+static struct platform_suspend_ops sharpsl_pm_ops = {
+        .enter          = corgi_pxa_pm_enter,
+        .valid          = suspend_valid_only_mem,
+};
+#endif
+
+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;
+
+#ifdef CONFIG_PM
+        suspend_set_ops(&sharpsl_pm_ops);
+#endif
+
+        mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250));
+
+        return 0;
+}
+
+static int 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);
+
+        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);