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949 lines
25 KiB
949 lines
25 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Battery and Power Management code for the Sharp SL-C7xx and SL-Cxx00 |
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* series of PDAs |
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* |
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* Copyright (c) 2004-2005 Richard Purdie |
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* |
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* Based on code written by Sharp for 2.4 kernels |
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*/ |
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#undef DEBUG |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/interrupt.h> |
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#include <linux/platform_device.h> |
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#include <linux/apm-emulation.h> |
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#include <linux/timer.h> |
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#include <linux/delay.h> |
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#include <linux/leds.h> |
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#include <linux/suspend.h> |
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#include <linux/gpio.h> |
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#include <linux/io.h> |
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#include <asm/mach-types.h> |
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#include "pm.h" |
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#include <mach/pxa2xx-regs.h> |
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#include "regs-rtc.h" |
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#include "sharpsl_pm.h" |
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/* |
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* Constants |
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*/ |
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#define SHARPSL_CHARGE_ON_TIME_INTERVAL (msecs_to_jiffies(1*60*1000)) /* 1 min */ |
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#define SHARPSL_CHARGE_FINISH_TIME (msecs_to_jiffies(10*60*1000)) /* 10 min */ |
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#define SHARPSL_BATCHK_TIME (msecs_to_jiffies(15*1000)) /* 15 sec */ |
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#define SHARPSL_BATCHK_TIME_SUSPEND (60*10) /* 10 min */ |
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#define SHARPSL_WAIT_CO_TIME 15 /* 15 sec */ |
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#define SHARPSL_WAIT_DISCHARGE_ON 100 /* 100 msec */ |
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#define SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP 10 /* 10 msec */ |
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#define SHARPSL_CHECK_BATTERY_WAIT_TIME_VOLT 10 /* 10 msec */ |
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#define SHARPSL_CHECK_BATTERY_WAIT_TIME_ACIN 10 /* 10 msec */ |
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#define SHARPSL_CHARGE_WAIT_TIME 15 /* 15 msec */ |
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#define SHARPSL_CHARGE_CO_CHECK_TIME 5 /* 5 msec */ |
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#define SHARPSL_CHARGE_RETRY_CNT 1 /* eqv. 10 min */ |
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/* |
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* Prototypes |
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*/ |
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#ifdef CONFIG_PM |
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static int sharpsl_off_charge_battery(void); |
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static int sharpsl_check_battery_voltage(void); |
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#endif |
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static int sharpsl_check_battery_temp(void); |
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static int sharpsl_ac_check(void); |
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static int sharpsl_average_value(int ad); |
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static void sharpsl_average_clear(void); |
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static void sharpsl_charge_toggle(struct work_struct *private_); |
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static void sharpsl_battery_thread(struct work_struct *private_); |
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/* |
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* Variables |
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*/ |
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struct sharpsl_pm_status sharpsl_pm; |
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static DECLARE_DELAYED_WORK(toggle_charger, sharpsl_charge_toggle); |
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static DECLARE_DELAYED_WORK(sharpsl_bat, sharpsl_battery_thread); |
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DEFINE_LED_TRIGGER(sharpsl_charge_led_trigger); |
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struct battery_thresh sharpsl_battery_levels_acin[] = { |
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{ 213, 100}, |
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{ 212, 98}, |
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{ 211, 95}, |
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{ 210, 93}, |
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{ 209, 90}, |
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{ 208, 88}, |
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{ 207, 85}, |
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{ 206, 83}, |
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{ 205, 80}, |
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{ 204, 78}, |
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{ 203, 75}, |
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{ 202, 73}, |
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{ 201, 70}, |
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{ 200, 68}, |
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{ 199, 65}, |
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{ 198, 63}, |
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{ 197, 60}, |
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{ 196, 58}, |
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{ 195, 55}, |
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{ 194, 53}, |
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{ 193, 50}, |
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{ 192, 48}, |
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{ 192, 45}, |
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{ 191, 43}, |
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{ 191, 40}, |
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{ 190, 38}, |
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{ 190, 35}, |
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{ 189, 33}, |
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{ 188, 30}, |
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{ 187, 28}, |
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{ 186, 25}, |
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{ 185, 23}, |
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{ 184, 20}, |
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{ 183, 18}, |
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{ 182, 15}, |
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{ 181, 13}, |
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{ 180, 10}, |
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{ 179, 8}, |
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{ 178, 5}, |
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{ 0, 0}, |
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}; |
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struct battery_thresh sharpsl_battery_levels_noac[] = { |
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{ 213, 100}, |
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{ 212, 98}, |
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{ 211, 95}, |
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{ 210, 93}, |
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{ 209, 90}, |
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{ 208, 88}, |
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{ 207, 85}, |
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{ 206, 83}, |
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{ 205, 80}, |
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{ 204, 78}, |
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{ 203, 75}, |
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{ 202, 73}, |
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{ 201, 70}, |
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{ 200, 68}, |
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{ 199, 65}, |
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{ 198, 63}, |
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{ 197, 60}, |
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{ 196, 58}, |
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{ 195, 55}, |
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{ 194, 53}, |
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{ 193, 50}, |
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{ 192, 48}, |
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{ 191, 45}, |
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{ 190, 43}, |
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{ 189, 40}, |
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{ 188, 38}, |
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{ 187, 35}, |
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{ 186, 33}, |
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{ 185, 30}, |
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{ 184, 28}, |
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{ 183, 25}, |
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{ 182, 23}, |
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{ 181, 20}, |
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{ 180, 18}, |
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{ 179, 15}, |
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{ 178, 13}, |
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{ 177, 10}, |
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{ 176, 8}, |
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{ 175, 5}, |
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{ 0, 0}, |
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}; |
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/* MAX1111 Commands */ |
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#define MAXCTRL_PD0 (1u << 0) |
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#define MAXCTRL_PD1 (1u << 1) |
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#define MAXCTRL_SGL (1u << 2) |
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#define MAXCTRL_UNI (1u << 3) |
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#define MAXCTRL_SEL_SH 4 |
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#define MAXCTRL_STR (1u << 7) |
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extern int max1111_read_channel(int); |
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/* |
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* Read MAX1111 ADC |
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*/ |
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int sharpsl_pm_pxa_read_max1111(int channel) |
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{ |
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/* Ugly, better move this function into another module */ |
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if (machine_is_tosa()) |
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return 0; |
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/* max1111 accepts channels from 0-3, however, |
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* it is encoded from 0-7 here in the code. |
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*/ |
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return max1111_read_channel(channel >> 1); |
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} |
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static int get_percentage(int voltage) |
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{ |
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int i = sharpsl_pm.machinfo->bat_levels - 1; |
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int bl_status = sharpsl_pm.machinfo->backlight_get_status ? sharpsl_pm.machinfo->backlight_get_status() : 0; |
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struct battery_thresh *thresh; |
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if (sharpsl_pm.charge_mode == CHRG_ON) |
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thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_acin_bl : sharpsl_pm.machinfo->bat_levels_acin; |
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else |
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thresh = bl_status ? sharpsl_pm.machinfo->bat_levels_noac_bl : sharpsl_pm.machinfo->bat_levels_noac; |
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while (i > 0 && (voltage > thresh[i].voltage)) |
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i--; |
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return thresh[i].percentage; |
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} |
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static int get_apm_status(int voltage) |
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{ |
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int low_thresh, high_thresh; |
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if (sharpsl_pm.charge_mode == CHRG_ON) { |
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high_thresh = sharpsl_pm.machinfo->status_high_acin; |
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low_thresh = sharpsl_pm.machinfo->status_low_acin; |
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} else { |
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high_thresh = sharpsl_pm.machinfo->status_high_noac; |
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low_thresh = sharpsl_pm.machinfo->status_low_noac; |
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} |
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if (voltage >= high_thresh) |
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return APM_BATTERY_STATUS_HIGH; |
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if (voltage >= low_thresh) |
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return APM_BATTERY_STATUS_LOW; |
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return APM_BATTERY_STATUS_CRITICAL; |
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} |
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void sharpsl_battery_kick(void) |
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{ |
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schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(125)); |
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} |
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EXPORT_SYMBOL(sharpsl_battery_kick); |
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static void sharpsl_battery_thread(struct work_struct *private_) |
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{ |
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int voltage, percent, apm_status, i; |
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if (!sharpsl_pm.machinfo) |
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return; |
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sharpsl_pm.battstat.ac_status = (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN) ? APM_AC_ONLINE : APM_AC_OFFLINE); |
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/* Corgi cannot confirm when battery fully charged so periodically kick! */ |
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if (!sharpsl_pm.machinfo->batfull_irq && (sharpsl_pm.charge_mode == CHRG_ON) |
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&& time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_ON_TIME_INTERVAL)) |
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schedule_delayed_work(&toggle_charger, 0); |
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for (i = 0; i < 5; i++) { |
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voltage = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_VOLT); |
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if (voltage > 0) |
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break; |
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} |
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if (voltage <= 0) { |
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voltage = sharpsl_pm.machinfo->bat_levels_noac[0].voltage; |
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dev_warn(sharpsl_pm.dev, "Warning: Cannot read main battery!\n"); |
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} |
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voltage = sharpsl_average_value(voltage); |
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apm_status = get_apm_status(voltage); |
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percent = get_percentage(voltage); |
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/* At low battery voltages, the voltage has a tendency to start |
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creeping back up so we try to avoid this here */ |
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if ((sharpsl_pm.battstat.ac_status == APM_AC_ONLINE) |
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|| (apm_status == APM_BATTERY_STATUS_HIGH) |
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|| percent <= sharpsl_pm.battstat.mainbat_percent) { |
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sharpsl_pm.battstat.mainbat_voltage = voltage; |
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sharpsl_pm.battstat.mainbat_status = apm_status; |
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sharpsl_pm.battstat.mainbat_percent = percent; |
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} |
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dev_dbg(sharpsl_pm.dev, "Battery: voltage: %d, status: %d, percentage: %d, time: %ld\n", voltage, |
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sharpsl_pm.battstat.mainbat_status, sharpsl_pm.battstat.mainbat_percent, jiffies); |
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/* Suspend if critical battery level */ |
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if ((sharpsl_pm.battstat.ac_status != APM_AC_ONLINE) |
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&& (sharpsl_pm.battstat.mainbat_status == APM_BATTERY_STATUS_CRITICAL) |
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&& !(sharpsl_pm.flags & SHARPSL_APM_QUEUED)) { |
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sharpsl_pm.flags |= SHARPSL_APM_QUEUED; |
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dev_err(sharpsl_pm.dev, "Fatal Off\n"); |
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apm_queue_event(APM_CRITICAL_SUSPEND); |
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} |
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schedule_delayed_work(&sharpsl_bat, SHARPSL_BATCHK_TIME); |
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} |
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void sharpsl_pm_led(int val) |
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{ |
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if (val == SHARPSL_LED_ERROR) { |
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dev_err(sharpsl_pm.dev, "Charging Error!\n"); |
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} else if (val == SHARPSL_LED_ON) { |
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dev_dbg(sharpsl_pm.dev, "Charge LED On\n"); |
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led_trigger_event(sharpsl_charge_led_trigger, LED_FULL); |
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} else { |
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dev_dbg(sharpsl_pm.dev, "Charge LED Off\n"); |
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led_trigger_event(sharpsl_charge_led_trigger, LED_OFF); |
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} |
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} |
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static void sharpsl_charge_on(void) |
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{ |
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dev_dbg(sharpsl_pm.dev, "Turning Charger On\n"); |
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sharpsl_pm.full_count = 0; |
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sharpsl_pm.charge_mode = CHRG_ON; |
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schedule_delayed_work(&toggle_charger, msecs_to_jiffies(250)); |
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schedule_delayed_work(&sharpsl_bat, msecs_to_jiffies(500)); |
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} |
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static void sharpsl_charge_off(void) |
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{ |
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dev_dbg(sharpsl_pm.dev, "Turning Charger Off\n"); |
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sharpsl_pm.machinfo->charge(0); |
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sharpsl_pm_led(SHARPSL_LED_OFF); |
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sharpsl_pm.charge_mode = CHRG_OFF; |
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schedule_delayed_work(&sharpsl_bat, 0); |
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} |
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static void sharpsl_charge_error(void) |
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{ |
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sharpsl_pm_led(SHARPSL_LED_ERROR); |
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sharpsl_pm.machinfo->charge(0); |
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sharpsl_pm.charge_mode = CHRG_ERROR; |
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} |
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static void sharpsl_charge_toggle(struct work_struct *private_) |
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{ |
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dev_dbg(sharpsl_pm.dev, "Toggling Charger at time: %lx\n", jiffies); |
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if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) { |
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sharpsl_charge_off(); |
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return; |
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} else if ((sharpsl_check_battery_temp() < 0) || (sharpsl_ac_check() < 0)) { |
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sharpsl_charge_error(); |
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return; |
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} |
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sharpsl_pm_led(SHARPSL_LED_ON); |
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sharpsl_pm.machinfo->charge(0); |
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mdelay(SHARPSL_CHARGE_WAIT_TIME); |
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sharpsl_pm.machinfo->charge(1); |
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sharpsl_pm.charge_start_time = jiffies; |
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} |
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static void sharpsl_ac_timer(struct timer_list *unused) |
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{ |
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int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); |
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dev_dbg(sharpsl_pm.dev, "AC Status: %d\n", acin); |
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sharpsl_average_clear(); |
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if (acin && (sharpsl_pm.charge_mode != CHRG_ON)) |
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sharpsl_charge_on(); |
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else if (sharpsl_pm.charge_mode == CHRG_ON) |
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sharpsl_charge_off(); |
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schedule_delayed_work(&sharpsl_bat, 0); |
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} |
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static irqreturn_t sharpsl_ac_isr(int irq, void *dev_id) |
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{ |
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/* Delay the event slightly to debounce */ |
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/* Must be a smaller delay than the chrg_full_isr below */ |
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mod_timer(&sharpsl_pm.ac_timer, jiffies + msecs_to_jiffies(250)); |
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return IRQ_HANDLED; |
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} |
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static void sharpsl_chrg_full_timer(struct timer_list *unused) |
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{ |
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dev_dbg(sharpsl_pm.dev, "Charge Full at time: %lx\n", jiffies); |
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sharpsl_pm.full_count++; |
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if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) { |
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dev_dbg(sharpsl_pm.dev, "Charge Full: AC removed - stop charging!\n"); |
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if (sharpsl_pm.charge_mode == CHRG_ON) |
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sharpsl_charge_off(); |
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} else if (sharpsl_pm.full_count < 2) { |
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dev_dbg(sharpsl_pm.dev, "Charge Full: Count too low\n"); |
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schedule_delayed_work(&toggle_charger, 0); |
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} else if (time_after(jiffies, sharpsl_pm.charge_start_time + SHARPSL_CHARGE_FINISH_TIME)) { |
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dev_dbg(sharpsl_pm.dev, "Charge Full: Interrupt generated too slowly - retry.\n"); |
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schedule_delayed_work(&toggle_charger, 0); |
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} else { |
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sharpsl_charge_off(); |
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sharpsl_pm.charge_mode = CHRG_DONE; |
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dev_dbg(sharpsl_pm.dev, "Charge Full: Charging Finished\n"); |
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} |
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} |
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/* Charging Finished Interrupt (Not present on Corgi) */ |
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/* Can trigger at the same time as an AC status change so |
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delay until after that has been processed */ |
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static irqreturn_t sharpsl_chrg_full_isr(int irq, void *dev_id) |
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{ |
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if (sharpsl_pm.flags & SHARPSL_SUSPENDED) |
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return IRQ_HANDLED; |
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/* delay until after any ac interrupt */ |
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mod_timer(&sharpsl_pm.chrg_full_timer, jiffies + msecs_to_jiffies(500)); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t sharpsl_fatal_isr(int irq, void *dev_id) |
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{ |
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int is_fatal = 0; |
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if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_LOCK)) { |
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dev_err(sharpsl_pm.dev, "Battery now Unlocked! Suspending.\n"); |
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is_fatal = 1; |
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} |
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if (!sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_FATAL)) { |
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dev_err(sharpsl_pm.dev, "Fatal Batt Error! Suspending.\n"); |
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is_fatal = 1; |
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} |
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if (!(sharpsl_pm.flags & SHARPSL_APM_QUEUED) && is_fatal) { |
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sharpsl_pm.flags |= SHARPSL_APM_QUEUED; |
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apm_queue_event(APM_CRITICAL_SUSPEND); |
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} |
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return IRQ_HANDLED; |
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} |
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/* |
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* Maintain an average of the last 10 readings |
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*/ |
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#define SHARPSL_CNV_VALUE_NUM 10 |
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static int sharpsl_ad_index; |
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static void sharpsl_average_clear(void) |
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{ |
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sharpsl_ad_index = 0; |
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} |
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static int sharpsl_average_value(int ad) |
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{ |
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int i, ad_val = 0; |
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static int sharpsl_ad[SHARPSL_CNV_VALUE_NUM+1]; |
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if (sharpsl_pm.battstat.mainbat_status != APM_BATTERY_STATUS_HIGH) { |
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sharpsl_ad_index = 0; |
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return ad; |
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} |
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sharpsl_ad[sharpsl_ad_index] = ad; |
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sharpsl_ad_index++; |
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if (sharpsl_ad_index >= SHARPSL_CNV_VALUE_NUM) { |
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for (i = 0; i < (SHARPSL_CNV_VALUE_NUM-1); i++) |
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sharpsl_ad[i] = sharpsl_ad[i+1]; |
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sharpsl_ad_index = SHARPSL_CNV_VALUE_NUM - 1; |
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} |
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for (i = 0; i < sharpsl_ad_index; i++) |
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ad_val += sharpsl_ad[i]; |
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return ad_val / sharpsl_ad_index; |
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} |
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|
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/* |
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* Take an array of 5 integers, remove the maximum and minimum values |
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* and return the average. |
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*/ |
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static int get_select_val(int *val) |
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{ |
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int i, j, k, temp, sum = 0; |
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|
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/* Find MAX val */ |
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temp = val[0]; |
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j = 0; |
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for (i = 1; i < 5; i++) { |
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if (temp < val[i]) { |
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temp = val[i]; |
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j = i; |
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} |
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} |
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/* Find MIN val */ |
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temp = val[4]; |
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k = 4; |
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for (i = 3; i >= 0; i--) { |
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if (temp > val[i]) { |
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temp = val[i]; |
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k = i; |
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} |
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} |
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for (i = 0; i < 5; i++) |
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if (i != j && i != k) |
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sum += val[i]; |
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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]); |
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return sum/3; |
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} |
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static int sharpsl_check_battery_temp(void) |
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{ |
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int val, i, buff[5]; |
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|
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/* Check battery temperature */ |
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for (i = 0; i < 5; i++) { |
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mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP); |
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sharpsl_pm.machinfo->measure_temp(1); |
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mdelay(SHARPSL_CHECK_BATTERY_WAIT_TIME_TEMP); |
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buff[i] = sharpsl_pm.machinfo->read_devdata(SHARPSL_BATT_TEMP); |
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sharpsl_pm.machinfo->measure_temp(0); |
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} |
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val = get_select_val(buff); |
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dev_dbg(sharpsl_pm.dev, "Temperature: %d\n", val); |
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if (val > sharpsl_pm.machinfo->charge_on_temp) { |
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printk(KERN_WARNING "Not charging: temperature out of limits.\n"); |
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return -1; |
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} |
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|
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return 0; |
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} |
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|
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#ifdef CONFIG_PM |
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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);
|
|
|