258 lines
7.0 KiB
C
258 lines
7.0 KiB
C
/*
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* Battery and Power Management code for the Sharp SL-C7xx
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*
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* Copyright (c) 2005 Richard Purdie
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/stat.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/delay.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 <asm/irq.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/sharpsl.h>
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#include <mach/corgi.h>
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#include <mach/pxa2xx-regs.h>
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#include <mach/pxa2xx-gpio.h>
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#include "sharpsl.h"
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#define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
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#define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
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#define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
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#define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
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#define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
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#define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
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static void corgi_charger_init(void)
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{
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pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
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pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
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pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
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pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
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}
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static void corgi_measure_temp(int on)
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{
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if (on)
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GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
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else
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GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
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}
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static void corgi_charge(int on)
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{
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if (on) {
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if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
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GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
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GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
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} else {
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GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
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GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
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}
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} else {
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GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
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GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
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}
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}
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static void corgi_discharge(int on)
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{
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if (on)
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GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
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else
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GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
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}
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static void corgi_presuspend(void)
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{
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int i;
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unsigned long wakeup_mask;
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/* charging , so CHARGE_ON bit is HIGH during OFF. */
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if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
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PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
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else
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PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
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if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
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PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
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else
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PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
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if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
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PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
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else
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PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
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/* Resume on keyboard power key */
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PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
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wakeup_mask = GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) | GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_CHRG_FULL);
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if (!machine_is_corgi())
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wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
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PWER = wakeup_mask | PWER_RTC;
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PRER = wakeup_mask;
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PFER = wakeup_mask;
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for (i = 0; i <=15; i++) {
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if (PRER & PFER & GPIO_bit(i)) {
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if (GPLR0 & GPIO_bit(i) )
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PRER &= ~GPIO_bit(i);
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else
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PFER &= ~GPIO_bit(i);
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}
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}
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}
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static void corgi_postsuspend(void)
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{
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}
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/*
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* Check what brought us out of the suspend.
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* Return: 0 to sleep, otherwise wake
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*/
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static int corgi_should_wakeup(unsigned int resume_on_alarm)
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{
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int is_resume = 0;
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dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
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if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
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if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
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/* charge on */
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dev_dbg(sharpsl_pm.dev, "ac insert\n");
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sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
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} else {
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/* charge off */
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dev_dbg(sharpsl_pm.dev, "ac remove\n");
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sharpsl_pm_led(SHARPSL_LED_OFF);
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sharpsl_pm.machinfo->charge(0);
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sharpsl_pm.charge_mode = CHRG_OFF;
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}
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}
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if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
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dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
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if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
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is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
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if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
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is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
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if (resume_on_alarm && (PEDR & PWER_RTC))
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is_resume |= PWER_RTC;
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dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
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return is_resume;
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}
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static unsigned long corgi_charger_wakeup(void)
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{
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return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
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}
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unsigned long corgipm_read_devdata(int type)
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{
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switch(type) {
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case SHARPSL_STATUS_ACIN:
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return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
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case SHARPSL_STATUS_LOCK:
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return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
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case SHARPSL_STATUS_CHRGFULL:
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return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
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case SHARPSL_STATUS_FATAL:
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return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
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case SHARPSL_ACIN_VOLT:
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return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
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case SHARPSL_BATT_TEMP:
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return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
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case SHARPSL_BATT_VOLT:
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default:
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return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
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}
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}
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static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
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.init = corgi_charger_init,
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.exit = NULL,
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.gpio_batlock = CORGI_GPIO_BAT_COVER,
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.gpio_acin = CORGI_GPIO_AC_IN,
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.gpio_batfull = CORGI_GPIO_CHRG_FULL,
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.discharge = corgi_discharge,
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.charge = corgi_charge,
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.measure_temp = corgi_measure_temp,
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.presuspend = corgi_presuspend,
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.postsuspend = corgi_postsuspend,
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.read_devdata = corgipm_read_devdata,
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.charger_wakeup = corgi_charger_wakeup,
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.should_wakeup = corgi_should_wakeup,
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#if defined(CONFIG_LCD_CORGI)
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.backlight_limit = corgi_lcd_limit_intensity,
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#elif defined(CONFIG_BACKLIGHT_CORGI)
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.backlight_limit = corgibl_limit_intensity,
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#endif
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.charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
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.charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
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.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
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.charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
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.fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
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.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
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.bat_levels = 40,
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.bat_levels_noac = sharpsl_battery_levels_noac,
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.bat_levels_acin = sharpsl_battery_levels_acin,
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.status_high_acin = 188,
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.status_low_acin = 178,
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.status_high_noac = 185,
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.status_low_noac = 175,
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};
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static struct platform_device *corgipm_device;
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static int __devinit corgipm_init(void)
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{
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int ret;
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if (!machine_is_corgi() && !machine_is_shepherd()
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&& !machine_is_husky())
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return -ENODEV;
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corgipm_device = platform_device_alloc("sharpsl-pm", -1);
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if (!corgipm_device)
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return -ENOMEM;
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if (!machine_is_corgi())
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corgi_pm_machinfo.batfull_irq = 1;
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corgipm_device->dev.platform_data = &corgi_pm_machinfo;
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ret = platform_device_add(corgipm_device);
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if (ret)
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platform_device_put(corgipm_device);
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return ret;
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}
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static void corgipm_exit(void)
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{
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platform_device_unregister(corgipm_device);
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}
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module_init(corgipm_init);
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module_exit(corgipm_exit);
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