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lineage_kernel_xcoverpro/drivers/rtc/rtc-s2mpu09.c

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/*
* rtc-s2mpu09.c
*
* Copyright (c) 2016 Samsung Electronics Co., Ltd
* http://www.samsung.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* 2013-12-11 Performance improvements and code clean up by
* Minsung Kim <ms925.kim@samsung.com>
*
*/
#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/rtc.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/mfd/samsung/rtc-s2mp.h>
#include <linux/mfd/samsung/s2mpu09.h>
#include <linux/mfd/samsung/s2mpu09-regulator.h>
#if defined(CONFIG_RTC_ALARM_BOOT)
#include <linux/reboot.h>
#include <linux/wakelock.h>
#endif
/*#define CONFIG_WEEKDAY_ALARM_ENABLE*/
struct s2m_rtc_info {
struct device *dev;
struct i2c_client *i2c;
struct i2c_client *pmic_i2c;
struct s2mpu09_dev *iodev;
struct rtc_device *rtc_dev;
struct mutex lock;
struct work_struct irq_work;
int irq;
#if defined(CONFIG_RTC_ALARM_BOOT)
int alarm_boot_irq;
bool lpm_mode;
bool alarm_irq_flag;
struct wake_lock alarm_wake_lock;
#endif
bool use_irq;
bool wtsr_en;
bool smpl_en;
bool alarm_enabled;
u8 update_reg;
bool use_alarm_workaround;
bool alarm_check;
u8 wudr_mask;
u8 audr_mask;
};
static struct wakeup_source *rtc_ws;
#ifdef CONFIG_SEC_PM
static bool is_rtc_cleared;
#endif
#if defined(CONFIG_BATTERY_SAMSUNG)
extern unsigned int lpcharge;
#endif
enum S2M_RTC_OP {
S2M_RTC_READ,
S2M_RTC_WRITE_TIME,
S2M_RTC_WRITE_ALARM,
};
static void s2m_data_to_tm(u8 *data, struct rtc_time *tm)
{
// tm->tm_msec = (data[RTC_MSEC] & 0x0f) + (data[RTC_MSEC] & 0xf0) * 10;
tm->tm_sec = data[RTC_SEC] & 0x7f;
tm->tm_min = data[RTC_MIN] & 0x7f;
tm->tm_hour = data[RTC_HOUR] & 0x1f;
tm->tm_wday = __fls(data[RTC_WEEKDAY] & 0x7f);
tm->tm_mday = data[RTC_DATE] & 0x1f;
tm->tm_mon = (data[RTC_MONTH] & 0x0f) - 1;
tm->tm_year = (data[RTC_YEAR] & 0x7f) + 100;
tm->tm_yday = 0;
tm->tm_isdst = 0;
}
#ifdef CONFIG_RTC_HIGH_RES
static void s2m_data_to_hrtm(u8 *data, struct rtc_hrtime *tm)
{
tm->tm_msec = (data[RTC_HR_MSEC] & 0x7f) * 10;
tm->tm_sec = data[RTC_HR_SEC] & 0x7f;
tm->tm_min = data[RTC_HR_MIN] & 0x7f;
tm->tm_hour = data[RTC_HR_HOUR] & 0x1f;
tm->tm_wday = __fls(data[RTC_HR_WEEKDAY] & 0x7f);
tm->tm_mday = data[RTC_HR_DATE] & 0x1f;
tm->tm_mon = (data[RTC_HR_MONTH] & 0x0f) - 1;
tm->tm_year = (data[RTC_HR_YEAR] & 0x7f) + 100;
tm->tm_yday = 0;
tm->tm_isdst = 0;
}
#endif /* CONFIG_RTC_HIGH_RES */
static int s2m_tm_to_data(struct rtc_time *tm, u8 *data)
{
// data[RTC_MSEC] = ((tm->tm_msec / 10) << 4) | (tm->tm_msec % 10);
data[RTC_SEC] = tm->tm_sec;
data[RTC_MIN] = tm->tm_min;
if (tm->tm_hour >= 12)
data[RTC_HOUR] = tm->tm_hour | HOUR_PM_MASK;
else
data[RTC_HOUR] = tm->tm_hour;
data[RTC_WEEKDAY] = BIT(tm->tm_wday);
data[RTC_DATE] = tm->tm_mday;
data[RTC_MONTH] = tm->tm_mon + 1;
data[RTC_YEAR] = tm->tm_year > 100 ? (tm->tm_year - 100) : 0 ;
if (tm->tm_year < 100) {
pr_warn("%s: SEC RTC cannot handle the year %d\n", __func__,
1900 + tm->tm_year);
return -EINVAL;
}
return 0;
}
static int s2m_rtc_update(struct s2m_rtc_info *info,
enum S2M_RTC_OP op)
{
u8 data;
int ret;
if (!info || !info->iodev) {
pr_err("%s: Invalid argument\n", __func__);
return -EINVAL;
}
switch (op) {
case S2M_RTC_READ:
data = RTC_RUDR_MASK;
break;
case S2M_RTC_WRITE_TIME:
data = RTC_WUDR_MASK_REV;
break;
case S2M_RTC_WRITE_ALARM:
data = RTC_AUDR_MASK_REV;
break;
default:
dev_err(info->dev, "%s: invalid op(%d)\n", __func__, op);
return -EINVAL;
}
data |= info->update_reg;
ret = s2mpu09_write_reg(info->i2c, S2MP_RTC_REG_UPDATE, data);
if (ret < 0)
dev_err(info->dev, "%s: fail to write update reg(%d,%u)\n",
__func__, ret, data);
else
usleep_range(1000, 1000);
return ret;
}
static int s2m_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
u8 data[NR_RTC_CNT_REGS];
int ret;
mutex_lock(&info->lock);
ret = s2m_rtc_update(info, S2M_RTC_READ);
if (ret < 0)
goto out;
ret = s2mpu09_bulk_read(info->i2c, S2MP_RTC_REG_SEC, NR_RTC_CNT_REGS,
data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__,
ret);
goto out;
}
dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d(0x%02x)%s\n",
__func__, data[RTC_YEAR] + 2000, data[RTC_MONTH],
data[RTC_DATE], data[RTC_HOUR] & 0x1f, data[RTC_MIN],
data[RTC_SEC], data[RTC_WEEKDAY],
data[RTC_HOUR] & HOUR_PM_MASK ? "PM" : "AM");
s2m_data_to_tm(data, tm);
ret = rtc_valid_tm(tm);
out:
mutex_unlock(&info->lock);
return ret;
}
#ifdef CONFIG_RTC_HIGH_RES
static int s2m_rtc_read_hrtime(struct device *dev, struct rtc_hrtime *tm)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
u8 data[NR_RTC_HR_CNT_REGS];
int ret;
mutex_lock(&info->lock);
ret = s2m_rtc_update(info, S2M_RTC_READ);
if (ret < 0)
goto out;
ret = s2mpu09_bulk_read(info->i2c, S2MP_RTC_REG_MSEC,
NR_RTC_HR_CNT_REGS, data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read hrtime reg(%d)\n",
__func__, ret);
goto out;
}
pr_info("%s: RTC_MSEC: 0x%02X\n", __func__, data[RTC_HR_MSEC]);
dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d.%03d(0x%02x)%s\n",
__func__, data[RTC_HR_YEAR] + 2000, data[RTC_HR_MONTH],
data[RTC_HR_DATE], data[RTC_HR_HOUR] & 0x1f,
data[RTC_HR_MIN], data[RTC_HR_SEC],
(data[RTC_HR_MSEC] & 0x7f) * 10, data[RTC_HR_WEEKDAY],
data[RTC_HR_HOUR] & HOUR_PM_MASK ? "PM" : "AM");
s2m_data_to_hrtm(data, tm);
ret = rtc_valid_hrtm(tm);
out:
mutex_unlock(&info->lock);
return ret;
}
#endif /* CONFIG_RTC_HIGH_RES */
static int s2m_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
u8 data[NR_RTC_CNT_REGS];
int ret;
ret = s2m_tm_to_data(tm, data);
if (ret < 0)
return ret;
dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d(0x%02x)%s\n",
__func__, data[RTC_YEAR] + 2000, data[RTC_MONTH],
data[RTC_DATE], data[RTC_HOUR] & 0x1f, data[RTC_MIN],
data[RTC_SEC], data[RTC_WEEKDAY],
data[RTC_HOUR] & HOUR_PM_MASK ? "PM" : "AM");
mutex_lock(&info->lock);
ret = s2mpu09_bulk_write(info->i2c, S2MP_RTC_REG_SEC, NR_RTC_CNT_REGS,
data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
ret);
goto out;
}
ret = s2m_rtc_update(info, S2M_RTC_WRITE_TIME);
out:
mutex_unlock(&info->lock);
return ret;
}
/* This is a workaround for the problem that RTC TIME is overwirted by write
* buffer when setting RTC ALARM. It is quite rare but it does happen. The root
* cuase is that clear signal of RUDR & WUDR is 1 clock delay while it should be
* 2 clock delay.
*/
static int s2m_rtc_check_rtc_time(struct s2m_rtc_info *info)
{
u8 data[NR_RTC_CNT_REGS];
struct rtc_time tm;
struct timeval sys_time;
unsigned long rtc_time;
int ret;
/* Read RTC TIME */
ret = s2m_rtc_update(info, S2M_RTC_READ);
if (ret < 0)
goto out;
ret = s2mpu09_bulk_read(info->i2c, S2MP_RTC_REG_SEC, NR_RTC_CNT_REGS,
data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__,
ret);
goto out;
}
/* Get system time */
do_gettimeofday(&sys_time);
/* Convert RTC TIME to seconds since 01-01-1970 00:00:00. */
s2m_data_to_tm(data, &tm);
rtc_tm_to_time(&tm, &rtc_time);
if (abs(rtc_time - sys_time.tv_sec) > 2) {
/* Set RTC TIME */
rtc_time_to_tm(sys_time.tv_sec, &tm);
ret = s2m_tm_to_data(&tm, data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to tm_to_data(%d)\n",
__func__, ret);
goto out;
}
ret = s2mpu09_bulk_write(info->i2c, S2MP_RTC_REG_SEC,
NR_RTC_CNT_REGS, data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write time reg(%d)\n",
__func__, ret);
goto out;
}
ret = s2m_rtc_update(info, S2M_RTC_WRITE_TIME);
dev_warn(info->dev, "%s: adjust RTC TIME: sys_time: %lu, "
"rtc_time: %lu\n", __func__, sys_time.tv_sec,
rtc_time);
dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d(0x%02x)%s\n",
__func__, data[RTC_YEAR] + 2000, data[RTC_MONTH],
data[RTC_DATE], data[RTC_HOUR] & 0x1f, data[RTC_MIN],
data[RTC_SEC], data[RTC_WEEKDAY],
data[RTC_HOUR] & HOUR_PM_MASK ? "PM" : "AM");
}
out:
return ret;
}
static int s2m_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
u8 data[NR_RTC_CNT_REGS];
u8 reg, val;
int ret;
mutex_lock(&info->lock);
ret = s2m_rtc_update(info, S2M_RTC_READ);
if (ret < 0)
goto out;
ret = s2mpu09_bulk_read(info->i2c, S2MP_RTC_REG_A0SEC, NR_RTC_CNT_REGS,
data);
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
__func__, __LINE__, ret);
goto out;
}
s2m_data_to_tm(data, &alrm->time);
dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d(%d)\n", __func__,
alrm->time.tm_year + 1900, alrm->time.tm_mon + 1,
alrm->time.tm_mday, alrm->time.tm_hour,
alrm->time.tm_min, alrm->time.tm_sec,
alrm->time.tm_wday);
alrm->enabled = info->alarm_enabled;
alrm->pending = 0;
switch (info->iodev->device_type) {
case S2MPU09X:
reg = S2MPU09_PMIC_REG_STATUS2;
break;
default:
/* If this happens the core funtion has a problem */
BUG();
}
ret = s2mpu09_read_reg(info->pmic_i2c, reg, &val); /* i2c for PM */
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read STATUS2 reg(%d)\n",
__func__, __LINE__, ret);
goto out;
}
if (val & RTCA0E)
alrm->pending = 1;
out:
mutex_unlock(&info->lock);
return ret;
}
static int s2m_rtc_set_alarm_enable(struct s2m_rtc_info *info, bool enabled)
{
if (!info->use_irq)
return -EPERM;
if (enabled && !info->alarm_enabled) {
info->alarm_enabled = true;
enable_irq(info->irq);
} else if (!enabled && info->alarm_enabled) {
info->alarm_enabled = false;
disable_irq(info->irq);
}
return 0;
}
static int s2m_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
u8 data[NR_RTC_CNT_REGS];
int ret, i;
mutex_lock(&info->lock);
ret = s2m_tm_to_data(&alrm->time, data);
if (ret < 0)
goto out;
dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d(0x%02x)%s\n",
__func__, data[RTC_YEAR] + 2000, data[RTC_MONTH],
data[RTC_DATE], data[RTC_HOUR] & 0x1f, data[RTC_MIN],
data[RTC_SEC], data[RTC_WEEKDAY],
data[RTC_HOUR] & HOUR_PM_MASK ? "PM" : "AM");
if (info->alarm_check) {
for (i = 0; i < NR_RTC_CNT_REGS; i++)
data[i] &= ~ALARM_ENABLE_MASK;
ret = s2mpu09_bulk_write(info->i2c, S2MP_RTC_REG_A0SEC, NR_RTC_CNT_REGS,
data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to disable alarm reg(%d)\n",
__func__, ret);
goto out;
}
ret = s2m_rtc_update(info, S2M_RTC_WRITE_ALARM);
if (ret < 0)
goto out;
}
for (i = 0; i < NR_RTC_CNT_REGS; i++)
data[i] |= ALARM_ENABLE_MASK;
ret = s2mpu09_bulk_write(info->i2c, S2MP_RTC_REG_A0SEC, NR_RTC_CNT_REGS,
data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
goto out;
}
ret = s2m_rtc_update(info, S2M_RTC_WRITE_ALARM);
if (ret < 0)
goto out;
if (info->use_alarm_workaround) {
ret = s2m_rtc_check_rtc_time(info);
if (ret < 0)
goto out;
}
ret = s2m_rtc_set_alarm_enable(info, alrm->enabled);
out:
mutex_unlock(&info->lock);
return ret;
}
#if defined(CONFIG_RTC_ALARM_BOOT)
static inline int s2m_rtc_set_update_reg(struct s2m_rtc_info *info,enum S2M_RTC_OP op)
{
int ret;
u8 data;
ret = s2mpu09_read_reg(info->i2c, S2MP_RTC_REG_UPDATE, &data);
if (ret < 0)
return ret;
switch (op) {
case S2M_RTC_READ:
data |= RTC_RUDR_MASK;
break;
case S2M_RTC_WRITE_TIME:
data |= info->wudr_mask;
break;
case S2M_RTC_WRITE_ALARM:
data |= info->audr_mask;
break;
default:
dev_err(info->dev, "%s: invalid op(%d)\n", __func__, op);
return -EINVAL;
}
ret = s2mpu09_write_reg(info->i2c, S2MP_RTC_REG_UPDATE,data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write update reg(%d)\n",
__func__, ret);
} else {
usleep_range(1000, 1000);
}
return ret;
}
static int s2m_rtc_stop_alarm_boot(struct s2m_rtc_info *info)
{
u8 data[7];
int ret, i;
struct rtc_time tm;
ret = s2mpu09_bulk_read(info->i2c, S2MP_RTC_REG_A1SEC, 7, data);
if (ret < 0)
return ret;
s2m_data_to_tm(data, &tm);
printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
for (i = 0; i < 7; i++)
data[i] &= ~ALARM_ENABLE_MASK;
ret = s2mpu09_bulk_write(info->i2c, S2MP_RTC_REG_A1SEC, 7, data);
if (ret < 0)
return ret;
ret = s2m_rtc_set_update_reg(info, S2M_RTC_WRITE_ALARM);
return ret;
}
static int s2m_rtc_start_alarm_boot(struct s2m_rtc_info *info)
{
int ret;
u8 data[7];
struct rtc_time tm;
ret = s2mpu09_bulk_read(info->i2c, S2MP_RTC_REG_A1SEC, 7, data);
if (ret < 0)
return ret;
s2m_data_to_tm(data, &tm);
printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
1900 + tm.tm_year, 1 + tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_wday);
data[RTC_SEC] |= ALARM_ENABLE_MASK;
data[RTC_MIN] |= ALARM_ENABLE_MASK;
data[RTC_HOUR] |= ALARM_ENABLE_MASK;
data[RTC_WEEKDAY] &= 0x00;
if (data[RTC_DATE] & 0x1f)
data[RTC_DATE] |= ALARM_ENABLE_MASK;
if (data[RTC_MONTH] & 0xf)
data[RTC_MONTH] |= ALARM_ENABLE_MASK;
if (data[RTC_YEAR] & 0x7f)
data[RTC_YEAR] |= ALARM_ENABLE_MASK;
ret = s2mpu09_bulk_write(info->i2c, S2MP_RTC_REG_A1SEC, 7, data);
if (ret < 0)
return ret;
ret = s2m_rtc_set_update_reg(info, S2M_RTC_WRITE_ALARM);
return ret;
}
static int s2m_rtc_set_alarm_boot(struct device *dev,
struct rtc_wkalrm *alrm)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
u8 data[7];
int ret;
mutex_lock(&info->lock);
s2m_tm_to_data(&alrm->time, data);
dev_info(info->dev, "%s: %d-%02d-%02d %02d:%02d:%02d(0x%02x)%s\n",
__func__, data[RTC_YEAR] + 2000, data[RTC_MONTH],
data[RTC_DATE], data[RTC_HOUR] & 0x1f, data[RTC_MIN],
data[RTC_SEC], data[RTC_WEEKDAY],
data[RTC_HOUR] & HOUR_PM_MASK ? "PM" : "AM");
ret = s2m_rtc_stop_alarm_boot(info);
if (ret < 0)
return ret;
ret = s2mpu09_read_reg(info->i2c, S2MP_RTC_REG_UPDATE, &info->update_reg);
if (ret < 0)
{
printk(KERN_INFO "%s: read fail \n", __func__);
return ret;
}
if (alrm->enabled)
info->update_reg |= RTC_WAKE_MASK;
else
info->update_reg &= ~RTC_WAKE_MASK;
ret = s2mpu09_write_reg(info->i2c, S2MP_RTC_REG_UPDATE, info->update_reg);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write update reg(%d)\n",
__func__, ret);
} else {
usleep_range(1000, 1000);
}
ret = s2mpu09_bulk_write(info->i2c, S2MP_RTC_REG_A1SEC, 7, data);
if (ret < 0)
return ret;
ret = s2m_rtc_set_update_reg(info, S2M_RTC_WRITE_ALARM);
if (ret < 0)
return ret;
if (alrm->enabled)
ret = s2m_rtc_start_alarm_boot(info);
mutex_unlock(&info->lock);
return ret;
}
static int s2m_rtc_get_alarm_boot(struct device *dev,
struct rtc_wkalrm *alrm)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
if( info->alarm_irq_flag)
alrm->enabled = 0x1;
else
alrm->enabled = 0x0;
printk("s2m_rtc_get_alarm_boot : %d, %d\n",
info->lpm_mode, alrm->enabled);
return info->lpm_mode;
}
#endif
static int s2m_rtc_alarm_irq_enable(struct device *dev,
unsigned int enabled)
{
struct s2m_rtc_info *info = dev_get_drvdata(dev);
int ret;
mutex_lock(&info->lock);
ret = s2m_rtc_set_alarm_enable(info, enabled);
mutex_unlock(&info->lock);
return ret;
}
#if defined(CONFIG_RTC_ALARM_BOOT)
static irqreturn_t s2m_rtc_alarm1_irq(int irq, void *data)
{
struct s2m_rtc_info *info = data;
dev_info(info->dev, "%s:irq(%d), lpm_mode:(%d)\n",
__func__, irq, info->lpm_mode);
if (info->lpm_mode) {
wake_lock(&info->alarm_wake_lock);
info->alarm_irq_flag = true;
}
rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
return IRQ_HANDLED;
}
#endif
static irqreturn_t s2m_rtc_alarm_irq(int irq, void *data)
{
struct s2m_rtc_info *info = data;
if (!info->rtc_dev)
return IRQ_HANDLED;
dev_info(info->dev, "%s:irq(%d)\n", __func__, irq);
rtc_update_irq(info->rtc_dev, 1, RTC_IRQF | RTC_AF);
__pm_wakeup_event(rtc_ws, 500);
return IRQ_HANDLED;
}
static const struct rtc_class_ops s2m_rtc_ops = {
.read_time = s2m_rtc_read_time,
.read_hrtime = s2m_rtc_read_hrtime,
.set_time = s2m_rtc_set_time,
.read_alarm = s2m_rtc_read_alarm,
.set_alarm = s2m_rtc_set_alarm,
#if defined(CONFIG_RTC_ALARM_BOOT)
.set_alarm_boot = s2m_rtc_set_alarm_boot,
.get_alarm_boot = s2m_rtc_get_alarm_boot,
#endif
.alarm_irq_enable = s2m_rtc_alarm_irq_enable,
};
static void s2m_rtc_optimize_osc(struct s2m_rtc_info *info,
struct s2mpu09_platform_data *pdata)
{
int ret = 0;
/* edit option for OSC_BIAS_UP */
if (pdata->osc_bias_up >= 0) {
ret = s2mpu09_update_reg(info->i2c, S2MP_RTC_REG_CAPSEL,
pdata->osc_bias_up << OSC_BIAS_UP_SHIFT,
OSC_BIAS_UP_MASK);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write OSC_BIAS_UP(%d)\n",
__func__, pdata->osc_bias_up);
return;
}
}
/* edit option for CAP_SEL */
if (pdata->cap_sel >= 0) {
s2mpu09_update_reg(info->i2c, S2MP_RTC_REG_CAPSEL,
pdata->cap_sel << CAP_SEL_SHIFT, CAP_SEL_MASK);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write CAP_SEL(%d)\n",
__func__, pdata->cap_sel);
return;
}
}
/* edit option for OSC_CTRL */
if (pdata->osc_xin >= 0) {
s2mpu09_update_reg(info->i2c, S2MP_RTC_REG_OSCCTRL,
pdata->osc_xin << OSC_XIN_SHIFT, OSC_XIN_MASK);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write OSC_CTRL(%d)\n",
__func__, pdata->osc_xin);
return;
}
}
if (pdata->osc_xout >= 0) {
s2mpu09_update_reg(info->i2c, S2MP_RTC_REG_OSCCTRL,
pdata->osc_xout << OSC_XOUT_SHIFT, OSC_XOUT_MASK);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write OSC_CTRL(%d)\n",
__func__, pdata->osc_xout);
return;
}
}
}
static bool s2m_is_jigonb_low(struct s2m_rtc_info *info)
{
int ret, reg;
u8 val, mask;
switch (info->iodev->device_type) {
case S2MPU09X:
reg = S2MPU09_PMIC_REG_STATUS1;
mask = BIT(1);
break;
default:
BUG();
}
ret = s2mpu09_read_reg(info->i2c, reg, &val);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read status1 reg(%d)\n",
__func__, ret);
return false;
}
return !(val & mask);
}
static void s2m_rtc_enable_wtsr_smpl(struct s2m_rtc_info *info,
struct s2mpu09_platform_data *pdata)
{
u8 val;
int ret;
if (pdata->wtsr_smpl->check_jigon && s2m_is_jigonb_low(info))
pdata->wtsr_smpl->smpl_en = false;
val = (pdata->wtsr_smpl->wtsr_en << WTSR_EN_SHIFT)
| (pdata->wtsr_smpl->smpl_en << SMPL_EN_SHIFT)
| WTSR_TIMER_BITS(pdata->wtsr_smpl->wtsr_timer_val)
| SMPL_TIMER_BITS(pdata->wtsr_smpl->smpl_timer_val);
dev_info(info->dev, "%s: WTSR: %s, SMPL: %s\n", __func__,
pdata->wtsr_smpl->wtsr_en ? "enable" : "disable",
pdata->wtsr_smpl->smpl_en ? "enable" : "disable");
ret = s2mpu09_write_reg(info->i2c, S2MP_RTC_REG_WTSR_SMPL, val);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write WTSR/SMPL reg(%d)\n",
__func__, ret);
return;
}
info->wtsr_en = pdata->wtsr_smpl->wtsr_en;
info->smpl_en = pdata->wtsr_smpl->smpl_en;
}
static void s2m_rtc_disable_wtsr_smpl(struct s2m_rtc_info *info,
struct s2mpu09_platform_data *pdata)
{
int ret;
dev_info(info->dev, "%s: disable WTSR\n", __func__);
ret = s2mpu09_update_reg(info->i2c, S2MP_RTC_REG_WTSR_SMPL, 0,
WTSR_EN_MASK | SMPL_EN_MASK);
if (ret < 0)
dev_err(info->dev, "%s: fail to update WTSR reg(%d)\n",
__func__, ret);
}
static int s2m_rtc_init_reg(struct s2m_rtc_info *info,
struct s2mpu09_platform_data *pdata)
{
u8 data, update_val, ctrl_val, capsel_val;
int ret;
#if defined(CONFIG_RTC_ALARM_BOOT)
u8 data_alm1[7];
struct rtc_time alrm;
ret = s2mpu09_bulk_read(info->i2c, S2MP_RTC_REG_A1SEC, 7, data_alm1);
if (ret < 0)
return ret;
s2m_data_to_tm(data_alm1, &alrm);
printk(KERN_INFO "%s: %d/%d/%d %d:%d:%d(%d)\n", __func__,
1900 + alrm.tm_year, 1 + alrm.tm_mon,
alrm.tm_mday, alrm.tm_hour,
alrm.tm_min, alrm.tm_sec,
alrm.tm_wday);
#endif
ret = s2mpu09_read_reg(info->i2c, S2MP_RTC_REG_UPDATE, &update_val);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read update reg(%d)\n",
__func__, ret);
return ret;
}
info->update_reg =
update_val & ~(RTC_WUDR_MASK_REV | RTC_FREEZE_MASK | RTC_RUDR_MASK | RTC_AUDR_MASK_REV);
ret = s2mpu09_write_reg(info->i2c, S2MP_RTC_REG_UPDATE, info->update_reg);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write update reg(%d)\n",
__func__, ret);
return ret;
}
s2m_rtc_update(info, S2M_RTC_READ);
ret = s2mpu09_read_reg(info->i2c, S2MP_RTC_REG_CTRL, &ctrl_val);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read control reg(%d)\n",
__func__, ret);
return ret;
}
ret = s2mpu09_read_reg(info->i2c, S2MP_RTC_REG_CAPSEL, &capsel_val);
if (ret < 0) {
dev_err(info->dev, "%s: fail to read cap_sel reg(%d)\n",
__func__, ret);
return ret;
}
/* If the value of RTC_CTRL register is 0, RTC registers were reset */
if ((ctrl_val & MODEL24_MASK) && ((capsel_val & 0xf0) == 0xf0))
return 0;
#ifdef CONFIG_SEC_PM
is_rtc_cleared = true;
#endif
/* Set RTC control register : Binary mode, 24hour mode */
data = MODEL24_MASK;
ret = s2mpu09_write_reg(info->i2c, S2MP_RTC_REG_CTRL, data);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write CTRL reg(%d)\n",
__func__, ret);
return ret;
}
ret = s2m_rtc_update(info, S2M_RTC_WRITE_ALARM);
if (ret < 0)
return ret;
capsel_val |= 0xf0;
ret = s2mpu09_write_reg(info->i2c, S2MP_RTC_REG_CAPSEL, capsel_val);
if (ret < 0) {
dev_err(info->dev, "%s: fail to write CAP_SEL reg(%d)\n",
__func__, ret);
return ret;
}
if (pdata->init_time) {
dev_info(info->dev, "%s: initialize RTC time\n", __func__);
ret = s2m_rtc_set_time(info->dev, pdata->init_time);
}
else {
dev_info(info->dev, "%s: RTC initialize is not operated: "
"This causes a weekday problem\n", __func__);
}
return ret;
}
#ifdef CONFIG_SEC_PM
static ssize_t show_rtc_status(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%u\n", is_rtc_cleared);
}
static DEVICE_ATTR(rtc_status, 0440, show_rtc_status, NULL);
#endif
static int s2m_rtc_probe(struct platform_device *pdev)
{
struct s2mpu09_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct s2mpu09_platform_data *pdata = dev_get_platdata(iodev->dev);
struct s2m_rtc_info *info;
int irq_base;
int ret = 0;
info = devm_kzalloc(&pdev->dev, sizeof(struct s2m_rtc_info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
irq_base = pdata->irq_base;
if (!irq_base) {
dev_err(&pdev->dev, "Failed to get irq base %d\n", irq_base);
return -ENODEV;
}
mutex_init(&info->lock);
info->dev = &pdev->dev;
info->iodev = iodev;
info->i2c = iodev->rtc;
info->pmic_i2c = iodev->pmic;
info->alarm_check = true;
info->use_alarm_workaround = false;
info->wudr_mask = RTC_WUDR_MASK_REV;
info->audr_mask = RTC_AUDR_MASK_REV;
switch (info->iodev->device_type) {
case S2MPU09X:
info->irq = irq_base + S2MPU09_PMIC_IRQ_RTCA0_INT2;
#if defined(CONFIG_RTC_ALARM_BOOT)
info->alarm_boot_irq = irq_base + S2MPU09_PMIC_IRQ_RTCA1_INT2;
#endif
break;
default:
/* If this happens the core funtion has a problem */
BUG();
}
platform_set_drvdata(pdev, info);
ret = s2m_rtc_init_reg(info, pdata);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret);
goto err_rtc_init_reg;
}
/* enable wtsrm smpl */
if (pdata->wtsr_smpl)
s2m_rtc_enable_wtsr_smpl(info, pdata);
s2m_rtc_optimize_osc(info, pdata);
device_init_wakeup(&pdev->dev, true);
rtc_ws = wakeup_source_register("rtc-s2mp");
ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
s2m_rtc_alarm_irq, 0, "rtc-alarm0", info);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
info->irq, ret);
goto err_rtc_irq;
}
disable_irq(info->irq);
disable_irq(info->irq);
info->use_irq = true;
info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s2mp-rtc",
&s2m_rtc_ops, THIS_MODULE);
if (IS_ERR(info->rtc_dev)) {
ret = PTR_ERR(info->rtc_dev);
dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
goto err_rtc_dev_register;
}
enable_irq(info->irq);
#ifdef CONFIG_SEC_PM
ret = sysfs_create_file(power_kobj, &dev_attr_rtc_status.attr);
if (ret)
dev_err(&pdev->dev, "%s: failed to create rtc_status(%d)\n",
__func__, ret);
#endif
#if defined(CONFIG_RTC_ALARM_BOOT)
ret = devm_request_threaded_irq(&pdev->dev, info->alarm_boot_irq, NULL,
s2m_rtc_alarm1_irq, 0, "rtc-alarm1", info);
if (ret < 0)
dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
info->alarm_boot_irq, ret);
info->lpm_mode = lpcharge;
if(info->lpm_mode)
wake_lock_init(&info->alarm_wake_lock, WAKE_LOCK_SUSPEND,
"alarm_wake_lock");
#endif
return 0;
err_rtc_dev_register:
devm_free_irq(&pdev->dev, info->irq, info);
enable_irq(info->irq);
enable_irq(info->irq);
err_rtc_irq:
wakeup_source_unregister(rtc_ws);
err_rtc_init_reg:
platform_set_drvdata(pdev, NULL);
mutex_destroy(&info->lock);
return ret;
}
static int s2m_rtc_remove(struct platform_device *pdev)
{
struct s2m_rtc_info *info = platform_get_drvdata(pdev);
if (!info->alarm_enabled)
enable_irq(info->irq);
#if defined(CONFIG_RTC_ALARM_BOOT)
free_irq(info->alarm_boot_irq, info);
#endif
wakeup_source_unregister(rtc_ws);
return 0;
}
static void s2m_rtc_shutdown(struct platform_device *pdev)
{
/*disable wtsr, smpl */
struct s2m_rtc_info *info = platform_get_drvdata(pdev);
struct s2mpu09_platform_data *pdata =
dev_get_platdata(info->iodev->dev);
if (info->wtsr_en || info->smpl_en)
s2m_rtc_disable_wtsr_smpl(info, pdata);
}
static const struct platform_device_id s2m_rtc_id[] = {
{ "s2mpu09-rtc", 0 },
};
static struct platform_driver s2m_rtc_driver = {
.driver = {
.name = "s2mpu09-rtc",
.owner = THIS_MODULE,
},
.probe = s2m_rtc_probe,
.remove = s2m_rtc_remove,
.shutdown = s2m_rtc_shutdown,
.id_table = s2m_rtc_id,
};
module_platform_driver(s2m_rtc_driver);
/* Module information */
MODULE_DESCRIPTION("Samsung RTC driver");
MODULE_AUTHOR("Samsung Electronics");
MODULE_LICENSE("GPL");
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