mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 11:13:07 +00:00
cd93d625fd
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
380 lines
8.1 KiB
C
380 lines
8.1 KiB
C
/*
|
|
* Epson RX8010 RTC driver.
|
|
*
|
|
* Copyright (c) 2017, General Electric Company
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <command.h>
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <rtc.h>
|
|
#include <linux/bitops.h>
|
|
|
|
/*---------------------------------------------------------------------*/
|
|
/* #undef DEBUG_RTC */
|
|
|
|
#ifdef DEBUG_RTC
|
|
#define DEBUGR(fmt, args...) printf(fmt, ##args)
|
|
#else
|
|
#define DEBUGR(fmt, args...)
|
|
#endif
|
|
/*---------------------------------------------------------------------*/
|
|
|
|
#ifndef CONFIG_SYS_I2C_RTC_ADDR
|
|
# define CONFIG_SYS_I2C_RTC_ADDR 0x32
|
|
#endif
|
|
|
|
/*
|
|
* RTC register addresses
|
|
*/
|
|
#define RX8010_SEC 0x10
|
|
#define RX8010_MIN 0x11
|
|
#define RX8010_HOUR 0x12
|
|
#define RX8010_WDAY 0x13
|
|
#define RX8010_MDAY 0x14
|
|
#define RX8010_MONTH 0x15
|
|
#define RX8010_YEAR 0x16
|
|
#define RX8010_YEAR 0x16
|
|
#define RX8010_RESV17 0x17
|
|
#define RX8010_ALMIN 0x18
|
|
#define RX8010_ALHOUR 0x19
|
|
#define RX8010_ALWDAY 0x1A
|
|
#define RX8010_TCOUNT0 0x1B
|
|
#define RX8010_TCOUNT1 0x1C
|
|
#define RX8010_EXT 0x1D
|
|
#define RX8010_FLAG 0x1E
|
|
#define RX8010_CTRL 0x1F
|
|
/* 0x20 to 0x2F are user registers */
|
|
#define RX8010_RESV30 0x30
|
|
#define RX8010_RESV31 0x32
|
|
#define RX8010_IRQ 0x32
|
|
|
|
#define RX8010_EXT_WADA BIT(3)
|
|
|
|
#define RX8010_FLAG_VLF BIT(1)
|
|
#define RX8010_FLAG_AF BIT(3)
|
|
#define RX8010_FLAG_TF BIT(4)
|
|
#define RX8010_FLAG_UF BIT(5)
|
|
|
|
#define RX8010_CTRL_AIE BIT(3)
|
|
#define RX8010_CTRL_UIE BIT(5)
|
|
#define RX8010_CTRL_STOP BIT(6)
|
|
#define RX8010_CTRL_TEST BIT(7)
|
|
|
|
#define RX8010_ALARM_AE BIT(7)
|
|
|
|
#ifdef CONFIG_DM_RTC
|
|
|
|
#define DEV_TYPE struct udevice
|
|
|
|
#else
|
|
|
|
/* Local udevice */
|
|
struct ludevice {
|
|
u8 chip;
|
|
};
|
|
|
|
#define DEV_TYPE struct ludevice
|
|
|
|
#endif
|
|
|
|
static int rx8010sj_rtc_read8(DEV_TYPE *dev, unsigned int reg)
|
|
{
|
|
u8 val;
|
|
int ret;
|
|
|
|
#ifdef CONFIG_DM_RTC
|
|
ret = dm_i2c_read(dev, reg, &val, sizeof(val));
|
|
#else
|
|
ret = i2c_read(dev->chip, reg, 1, &val, 1);
|
|
#endif
|
|
|
|
return ret < 0 ? ret : val;
|
|
}
|
|
|
|
static int rx8010sj_rtc_write8(DEV_TYPE *dev, unsigned int reg, int val)
|
|
{
|
|
int ret;
|
|
u8 lval = val;
|
|
|
|
#ifdef CONFIG_DM_RTC
|
|
ret = dm_i2c_write(dev, reg, &lval, 1);
|
|
#else
|
|
ret = i2c_write(dev->chip, reg, 1, &lval, 1);
|
|
#endif
|
|
|
|
return ret < 0 ? ret : 0;
|
|
}
|
|
|
|
static int validate_time(const struct rtc_time *tm)
|
|
{
|
|
if ((tm->tm_year < 2000) || (tm->tm_year > 2099))
|
|
return -EINVAL;
|
|
|
|
if ((tm->tm_mon < 1) || (tm->tm_mon > 12))
|
|
return -EINVAL;
|
|
|
|
if ((tm->tm_mday < 1) || (tm->tm_mday > 31))
|
|
return -EINVAL;
|
|
|
|
if ((tm->tm_wday < 0) || (tm->tm_wday > 6))
|
|
return -EINVAL;
|
|
|
|
if ((tm->tm_hour < 0) || (tm->tm_hour > 23))
|
|
return -EINVAL;
|
|
|
|
if ((tm->tm_min < 0) || (tm->tm_min > 59))
|
|
return -EINVAL;
|
|
|
|
if ((tm->tm_sec < 0) || (tm->tm_sec > 59))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rx8010sj_rtc_init(DEV_TYPE *dev)
|
|
{
|
|
u8 ctrl[2];
|
|
int need_clear = 0, ret = 0;
|
|
|
|
/* Initialize reserved registers as specified in datasheet */
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_RESV17, 0xD8);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_RESV30, 0x00);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_RESV31, 0x08);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_IRQ, 0x00);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
for (int i = 0; i < 2; i++) {
|
|
ret = rx8010sj_rtc_read8(dev, RX8010_FLAG + i);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ctrl[i] = ret;
|
|
}
|
|
|
|
if (ctrl[0] & RX8010_FLAG_VLF)
|
|
printf("RTC low voltage detected\n");
|
|
|
|
if (ctrl[0] & RX8010_FLAG_AF) {
|
|
printf("Alarm was detected\n");
|
|
need_clear = 1;
|
|
}
|
|
|
|
if (ctrl[0] & RX8010_FLAG_TF)
|
|
need_clear = 1;
|
|
|
|
if (ctrl[0] & RX8010_FLAG_UF)
|
|
need_clear = 1;
|
|
|
|
if (need_clear) {
|
|
ctrl[0] &= ~(RX8010_FLAG_AF | RX8010_FLAG_TF | RX8010_FLAG_UF);
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_FLAG, ctrl[0]);
|
|
if (ret < 0)
|
|
goto error;
|
|
}
|
|
|
|
return;
|
|
|
|
error:
|
|
printf("Error rtc init.\n");
|
|
}
|
|
|
|
/* Get the current time from the RTC */
|
|
static int rx8010sj_rtc_get(DEV_TYPE *dev, struct rtc_time *tmp)
|
|
{
|
|
u8 date[7];
|
|
int flagreg;
|
|
int ret;
|
|
|
|
flagreg = rx8010sj_rtc_read8(dev, RX8010_FLAG);
|
|
if (flagreg < 0) {
|
|
DEBUGR("Error reading from RTC. err: %d\n", flagreg);
|
|
return -EIO;
|
|
}
|
|
|
|
if (flagreg & RX8010_FLAG_VLF) {
|
|
DEBUGR("RTC low voltage detected\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (int i = 0; i < 7; i++) {
|
|
ret = rx8010sj_rtc_read8(dev, RX8010_SEC + i);
|
|
if (ret < 0) {
|
|
DEBUGR("Error reading from RTC. err: %d\n", ret);
|
|
return -EIO;
|
|
}
|
|
date[i] = ret;
|
|
}
|
|
|
|
tmp->tm_sec = bcd2bin(date[RX8010_SEC - RX8010_SEC] & 0x7f);
|
|
tmp->tm_min = bcd2bin(date[RX8010_MIN - RX8010_SEC] & 0x7f);
|
|
tmp->tm_hour = bcd2bin(date[RX8010_HOUR - RX8010_SEC] & 0x3f);
|
|
tmp->tm_mday = bcd2bin(date[RX8010_MDAY - RX8010_SEC] & 0x3f);
|
|
tmp->tm_mon = bcd2bin(date[RX8010_MONTH - RX8010_SEC] & 0x1f);
|
|
tmp->tm_year = bcd2bin(date[RX8010_YEAR - RX8010_SEC]) + 2000;
|
|
tmp->tm_wday = 0;
|
|
tmp->tm_yday = 0;
|
|
tmp->tm_isdst = 0;
|
|
|
|
DEBUGR("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Set the RTC */
|
|
static int rx8010sj_rtc_set(DEV_TYPE *dev, const struct rtc_time *tm)
|
|
{
|
|
u8 date[7];
|
|
int ctrl, flagreg;
|
|
int ret;
|
|
|
|
ret = validate_time(tm);
|
|
if (ret < 0)
|
|
return -EINVAL;
|
|
|
|
/* set STOP bit before changing clock/calendar */
|
|
ctrl = rx8010sj_rtc_read8(dev, RX8010_CTRL);
|
|
if (ctrl < 0)
|
|
return ctrl;
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_CTRL, ctrl | RX8010_CTRL_STOP);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
date[RX8010_SEC - RX8010_SEC] = bin2bcd(tm->tm_sec);
|
|
date[RX8010_MIN - RX8010_SEC] = bin2bcd(tm->tm_min);
|
|
date[RX8010_HOUR - RX8010_SEC] = bin2bcd(tm->tm_hour);
|
|
date[RX8010_MDAY - RX8010_SEC] = bin2bcd(tm->tm_mday);
|
|
date[RX8010_MONTH - RX8010_SEC] = bin2bcd(tm->tm_mon);
|
|
date[RX8010_YEAR - RX8010_SEC] = bin2bcd(tm->tm_year - 2000);
|
|
date[RX8010_WDAY - RX8010_SEC] = bin2bcd(tm->tm_wday);
|
|
|
|
for (int i = 0; i < 7; i++) {
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_SEC + i, date[i]);
|
|
if (ret < 0) {
|
|
DEBUGR("Error writing to RTC. err: %d\n", ret);
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
/* clear STOP bit after changing clock/calendar */
|
|
ctrl = rx8010sj_rtc_read8(dev, RX8010_CTRL);
|
|
if (ctrl < 0)
|
|
return ctrl;
|
|
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_CTRL, ctrl & ~RX8010_CTRL_STOP);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
flagreg = rx8010sj_rtc_read8(dev, RX8010_FLAG);
|
|
if (flagreg < 0)
|
|
return flagreg;
|
|
|
|
if (flagreg & RX8010_FLAG_VLF)
|
|
ret = rx8010sj_rtc_write8(dev, RX8010_FLAG,
|
|
flagreg & ~RX8010_FLAG_VLF);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Reset the RTC. */
|
|
static int rx8010sj_rtc_reset(DEV_TYPE *dev)
|
|
{
|
|
/* Not needed */
|
|
return 0;
|
|
}
|
|
|
|
#ifndef CONFIG_DM_RTC
|
|
|
|
int rtc_get(struct rtc_time *tm)
|
|
{
|
|
struct ludevice dev = {
|
|
.chip = CONFIG_SYS_I2C_RTC_ADDR,
|
|
};
|
|
|
|
return rx8010sj_rtc_get(&dev, tm);
|
|
}
|
|
|
|
int rtc_set(struct rtc_time *tm)
|
|
{
|
|
struct ludevice dev = {
|
|
.chip = CONFIG_SYS_I2C_RTC_ADDR,
|
|
};
|
|
|
|
return rx8010sj_rtc_set(&dev, tm);
|
|
}
|
|
|
|
void rtc_reset(void)
|
|
{
|
|
struct ludevice dev = {
|
|
.chip = CONFIG_SYS_I2C_RTC_ADDR,
|
|
};
|
|
|
|
rx8010sj_rtc_reset(&dev);
|
|
}
|
|
|
|
void rtc_init(void)
|
|
{
|
|
struct ludevice dev = {
|
|
.chip = CONFIG_SYS_I2C_RTC_ADDR,
|
|
};
|
|
|
|
rx8010sj_rtc_init(&dev);
|
|
}
|
|
|
|
#else
|
|
|
|
static int rx8010sj_probe(struct udevice *dev)
|
|
{
|
|
rx8010sj_rtc_init(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rtc_ops rx8010sj_rtc_ops = {
|
|
.get = rx8010sj_rtc_get,
|
|
.set = rx8010sj_rtc_set,
|
|
.read8 = rx8010sj_rtc_read8,
|
|
.write8 = rx8010sj_rtc_write8,
|
|
.reset = rx8010sj_rtc_reset,
|
|
};
|
|
|
|
static const struct udevice_id rx8010sj_rtc_ids[] = {
|
|
{ .compatible = "epson,rx8010sj-rtc" },
|
|
{ .compatible = "epson,rx8010" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(rx8010sj_rtc) = {
|
|
.name = "rx8010sj_rtc",
|
|
.id = UCLASS_RTC,
|
|
.probe = rx8010sj_probe,
|
|
.of_match = rx8010sj_rtc_ids,
|
|
.ops = &rx8010sj_rtc_ops,
|
|
};
|
|
|
|
#endif
|