diff options
Diffstat (limited to 'arch/arm/mach-pxa/sharpsl_pm.c')
| -rw-r--r-- | arch/arm/mach-pxa/sharpsl_pm.c | 953 |
1 files changed, 953 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/sharpsl_pm.c b/arch/arm/mach-pxa/sharpsl_pm.c new file mode 100644 index 000000000..ef9fd9b75 --- /dev/null +++ b/arch/arm/mach-pxa/sharpsl_pm.c @@ -0,0 +1,953 @@ +/* + * 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/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 <mach/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) +{ + /* Ugly, better move this function into another module */ + if (machine_is_tosa()) + return 0; + + /* 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)); +} +EXPORT_SYMBOL(sharpsl_battery_kick); + + +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 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); + + 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); + + 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 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); |