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