// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery and Power Management code for the Sharp SL-Cxx00
*
* Copyright (c) 2005 Richard Purdie
*/
#include <linux/module.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/gpio-pxa.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/apm-emulation.h>
#include <linux/spi/corgi_lcd.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include "spitz.h"
#include "pxa27x.h"
#include "sharpsl_pm.h"
#include "generic.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 int spitz_last_ac_status;
static void spitz_charger_init(void)
{
gpio_request(SPITZ_GPIO_KEY_INT, "Keyboard Interrupt");
gpio_direction_input(SPITZ_GPIO_KEY_INT);
gpio_request(SPITZ_GPIO_SYNC, "Sync");
gpio_direction_input(SPITZ_GPIO_SYNC);
gpio_request(SPITZ_GPIO_AC_IN, "Charger Detection");
gpio_direction_input(SPITZ_GPIO_AC_IN);
gpio_request(SPITZ_GPIO_ADC_TEMP_ON, "ADC Temp On");
gpio_direction_output(SPITZ_GPIO_ADC_TEMP_ON, 0);
gpio_request(SPITZ_GPIO_JK_B, "JK B");
gpio_direction_output(SPITZ_GPIO_JK_B, 0);
gpio_request(SPITZ_GPIO_CHRG_ON, "Charger On");
gpio_direction_output(SPITZ_GPIO_CHRG_ON, 0);
}
static void spitz_measure_temp(int on)
{
gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
}
static void spitz_charge(int on)
{
if (on) {
if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
gpio_set_value(SPITZ_GPIO_JK_B, 1);
gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
} else {
gpio_set_value(SPITZ_GPIO_JK_B, 0);
gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
}
} else {
gpio_set_value(SPITZ_GPIO_JK_B, 0);
gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
}
}
static void spitz_discharge(int on)
{
gpio_set_value(SPITZ_GPIO_JK_A, on);
}
/* HACK - For unknown reasons, accurate voltage readings are only made with a load
on the power bus which the green led on spitz provides */
static void spitz_discharge1(int on)
{
gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
}
static unsigned long gpio18_config = GPIO18_GPIO;
static void spitz_presuspend(void)
{
spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
/* GPIO Sleep Register */
PGSR0 = 0x00144018;
PGSR1 = 0x00EF0000;
if (machine_is_akita()) {
PGSR2 = 0x2121C000;
PGSR3 = 0x00600400;
} else {
PGSR2 = 0x0121C000;
PGSR3 = 0x00600000;
}
PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
pxa2xx_mfp_config(&gpio18_config, 1);
gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
gpio_free(18);
PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
PKSR = 0xffffffff; /* clear */
/* nRESET_OUT Disable */
PSLR |= PSLR_SL_ROD;
/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
PCFR = PCFR_GPR_EN | PCFR_OPDE;
}
static void spitz_postsuspend(void)
{
}
static int spitz_should_wakeup(unsigned int resume_on_alarm)
{
int is_resume = 0;
int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
if (spitz_last_ac_status != acin) {
if (acin) {
/* charge on */
sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
} else {
/* charge off */
dev_dbg(sharpsl_pm.dev, "AC Removed\n");
sharpsl_pm_led(SHARPSL_LED_OFF);
sharpsl_pm.machinfo->charge(0);
sharpsl_pm.charge_mode = CHRG_OFF;
}
spitz_last_ac_status = acin;
/* Return to suspend as this must be what we were woken for */
return 0;
}
if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
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 bool spitz_charger_wakeup(void)
{
return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
gpio_get_value(SPITZ_GPIO_SYNC);
}
static unsigned long spitzpm_read_devdata(int type)
{
switch (type) {
case SHARPSL_STATUS_ACIN:
return !gpio_get_value(SPITZ_GPIO_AC_IN);
case SHARPSL_STATUS_LOCK:
return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
case SHARPSL_STATUS_CHRGFULL:
return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
case SHARPSL_STATUS_FATAL:
return gpio_get_value(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);
}
}
struct sharpsl_charger_machinfo spitz_pm_machinfo = {
.init = spitz_charger_init,
.exit = NULL,
.gpio_batlock = SPITZ_GPIO_BAT_COVER,
.gpio_acin = SPITZ_GPIO_AC_IN,
.gpio_batfull = SPITZ_GPIO_CHRG_FULL,
.batfull_irq = 1,
.gpio_fatal = SPITZ_GPIO_FATAL_BAT,
.discharge = spitz_discharge,
.discharge1 = spitz_discharge1,
.charge = spitz_charge,
.measure_temp = spitz_measure_temp,
.presuspend = spitz_presuspend,
.postsuspend = spitz_postsuspend,
.read_devdata = spitzpm_read_devdata,
.charger_wakeup = spitz_charger_wakeup,
.should_wakeup = spitz_should_wakeup,
#if defined(CONFIG_LCD_CORGI)
.backlight_limit = corgi_lcd_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 = sharpsl_battery_levels_noac,
.bat_levels_acin = sharpsl_battery_levels_acin,
.status_high_acin = 188,
.status_low_acin = 178,
.status_high_noac = 185,
.status_low_noac = 175,
};
static struct platform_device *spitzpm_device;
static int spitzpm_init(void)
{
int ret;
if (!machine_is_spitz() && !machine_is_akita()
&& !machine_is_borzoi())
return -ENODEV;
spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
if (!spitzpm_device)
return -ENOMEM;
spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
ret = platform_device_add(spitzpm_device);
if (ret)
platform_device_put(spitzpm_device);
return ret;
}
static void spitzpm_exit(void)
{
platform_device_unregister(spitzpm_device);
}
module_init(spitzpm_init);
module_exit(spitzpm_exit);
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