| /* |
| * 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 <asm/mach-types.h> |
| #include <mach/pm.h> |
| #include <mach/pxa2xx-regs.h> |
| #include <mach/regs-rtc.h> |
| #include <mach/sharpsl.h> |
| #include <mach/sharpsl_pm.h> |
| |
| #include "sharpsl.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; |
| 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) |
| |
| /* |
| * 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; |
| |
| #ifdef CONFIG_CORGI_SSP_DEPRECATED |
| return corgi_ssp_max1111_get((channel << MAXCTRL_SEL_SH) | MAXCTRL_PD0 | MAXCTRL_PD1 |
| | MAXCTRL_SGL | MAXCTRL_UNI | MAXCTRL_STR); |
| #else |
| extern int max1111_read_channel(int); |
| |
| /* max1111 accepts channels from 0-3, however, |
| * it is encoded from 0-7 here in the code. |
| */ |
| return max1111_read_channel(channel >> 1); |
| #endif |
| } |
| |
| 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); |
| |
| #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, "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(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); |
| } |
| |
| |
| 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(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 */ |
| 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_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_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; |
| } |
| |
| /* |
| * 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()) |
| 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 = { |
| .prepare = pxa_pm_prepare, |
| .finish = pxa_pm_finish, |
| .enter = corgi_pxa_pm_enter, |
| .valid = suspend_valid_only_mem, |
| }; |
| #endif |
| |
| static int __devinit 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(); |
| |
| 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 */ |
| if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "AC Input Detect", sharpsl_ac_isr)) { |
| dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin)); |
| } |
| |
| if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Battery Cover", sharpsl_fatal_isr)) { |
| dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock)); |
| } |
| |
| if (sharpsl_pm.machinfo->gpio_fatal) { |
| if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr, IRQF_DISABLED | IRQF_TRIGGER_FALLING, "Fatal Battery", sharpsl_fatal_isr)) { |
| dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal)); |
| } |
| } |
| |
| if (sharpsl_pm.machinfo->batfull_irq) { |
| /* Register interrupt handler. */ |
| if (request_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull), sharpsl_chrg_full_isr, IRQF_DISABLED | IRQF_TRIGGER_RISING, "CO", sharpsl_chrg_full_isr)) { |
| dev_err(sharpsl_pm.dev, "Could not get irq %d.\n", IRQ_GPIO(sharpsl_pm.machinfo->gpio_batfull)); |
| } |
| } |
| |
| 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(IRQ_GPIO(sharpsl_pm.machinfo->gpio_acin), sharpsl_ac_isr); |
| free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_batlock), sharpsl_fatal_isr); |
| |
| if (sharpsl_pm.machinfo->gpio_fatal) |
| free_irq(IRQ_GPIO(sharpsl_pm.machinfo->gpio_fatal), sharpsl_fatal_isr); |
| |
| if (sharpsl_pm.machinfo->batfull_irq) |
| free_irq(IRQ_GPIO(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 __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); |