upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
349 lines
8.9 KiB
349 lines
8.9 KiB
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2001, 2002, 2003
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
* Keith Outwater, keith_outwater@mvis.com`
|
|
* Steven Scholz, steven.scholz@imc-berlin.de
|
|
*/
|
|
|
|
/*
|
|
* Date & Time support (no alarms) for Dallas Semiconductor (now Maxim)
|
|
* DS1307 and DS1338/9 Real Time Clock (RTC).
|
|
*
|
|
* based on ds1337.c
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <dm.h>
|
|
#include <rtc.h>
|
|
#include <i2c.h>
|
|
|
|
enum ds_type {
|
|
ds_1307,
|
|
ds_1337,
|
|
ds_1340,
|
|
mcp794xx,
|
|
};
|
|
|
|
/*
|
|
* RTC register addresses
|
|
*/
|
|
#define RTC_SEC_REG_ADDR 0x00
|
|
#define RTC_MIN_REG_ADDR 0x01
|
|
#define RTC_HR_REG_ADDR 0x02
|
|
#define RTC_DAY_REG_ADDR 0x03
|
|
#define RTC_DATE_REG_ADDR 0x04
|
|
#define RTC_MON_REG_ADDR 0x05
|
|
#define RTC_YR_REG_ADDR 0x06
|
|
#define RTC_CTL_REG_ADDR 0x07
|
|
|
|
#define RTC_SEC_BIT_CH 0x80 /* Clock Halt (in Register 0) */
|
|
|
|
#define RTC_CTL_BIT_RS0 0x01 /* Rate select 0 */
|
|
#define RTC_CTL_BIT_RS1 0x02 /* Rate select 1 */
|
|
#define RTC_CTL_BIT_SQWE 0x10 /* Square Wave Enable */
|
|
#define RTC_CTL_BIT_OUT 0x80 /* Output Control */
|
|
|
|
/* MCP7941X-specific bits */
|
|
#define MCP7941X_BIT_ST 0x80
|
|
#define MCP7941X_BIT_VBATEN 0x08
|
|
|
|
#ifndef CONFIG_DM_RTC
|
|
|
|
#if defined(CONFIG_CMD_DATE)
|
|
|
|
/*---------------------------------------------------------------------*/
|
|
#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 0x68
|
|
#endif
|
|
|
|
#if defined(CONFIG_RTC_DS1307) && (CONFIG_SYS_I2C_SPEED > 100000)
|
|
# error The DS1307 is specified only up to 100kHz!
|
|
#endif
|
|
|
|
static uchar rtc_read (uchar reg);
|
|
static void rtc_write (uchar reg, uchar val);
|
|
|
|
/*
|
|
* Get the current time from the RTC
|
|
*/
|
|
int rtc_get (struct rtc_time *tmp)
|
|
{
|
|
int rel = 0;
|
|
uchar sec, min, hour, mday, wday, mon, year;
|
|
|
|
#ifdef CONFIG_RTC_MCP79411
|
|
read_rtc:
|
|
#endif
|
|
sec = rtc_read (RTC_SEC_REG_ADDR);
|
|
min = rtc_read (RTC_MIN_REG_ADDR);
|
|
hour = rtc_read (RTC_HR_REG_ADDR);
|
|
wday = rtc_read (RTC_DAY_REG_ADDR);
|
|
mday = rtc_read (RTC_DATE_REG_ADDR);
|
|
mon = rtc_read (RTC_MON_REG_ADDR);
|
|
year = rtc_read (RTC_YR_REG_ADDR);
|
|
|
|
DEBUGR ("Get RTC year: %02x mon: %02x mday: %02x wday: %02x "
|
|
"hr: %02x min: %02x sec: %02x\n",
|
|
year, mon, mday, wday, hour, min, sec);
|
|
|
|
#ifdef CONFIG_RTC_DS1307
|
|
if (sec & RTC_SEC_BIT_CH) {
|
|
printf ("### Warning: RTC oscillator has stopped\n");
|
|
/* clear the CH flag */
|
|
rtc_write (RTC_SEC_REG_ADDR,
|
|
rtc_read (RTC_SEC_REG_ADDR) & ~RTC_SEC_BIT_CH);
|
|
rel = -1;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_RTC_MCP79411
|
|
/* make sure that the backup battery is enabled */
|
|
if (!(wday & MCP7941X_BIT_VBATEN)) {
|
|
rtc_write(RTC_DAY_REG_ADDR,
|
|
wday | MCP7941X_BIT_VBATEN);
|
|
}
|
|
|
|
/* clock halted? turn it on, so clock can tick. */
|
|
if (!(sec & MCP7941X_BIT_ST)) {
|
|
rtc_write(RTC_SEC_REG_ADDR, MCP7941X_BIT_ST);
|
|
printf("Started RTC\n");
|
|
goto read_rtc;
|
|
}
|
|
#endif
|
|
|
|
|
|
tmp->tm_sec = bcd2bin (sec & 0x7F);
|
|
tmp->tm_min = bcd2bin (min & 0x7F);
|
|
tmp->tm_hour = bcd2bin (hour & 0x3F);
|
|
tmp->tm_mday = bcd2bin (mday & 0x3F);
|
|
tmp->tm_mon = bcd2bin (mon & 0x1F);
|
|
tmp->tm_year = bcd2bin (year) + ( bcd2bin (year) >= 70 ? 1900 : 2000);
|
|
tmp->tm_wday = bcd2bin ((wday - 1) & 0x07);
|
|
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 rel;
|
|
}
|
|
|
|
|
|
/*
|
|
* Set the RTC
|
|
*/
|
|
int rtc_set (struct rtc_time *tmp)
|
|
{
|
|
DEBUGR ("Set 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);
|
|
|
|
if (tmp->tm_year < 1970 || tmp->tm_year > 2069)
|
|
printf("WARNING: year should be between 1970 and 2069!\n");
|
|
|
|
rtc_write (RTC_YR_REG_ADDR, bin2bcd (tmp->tm_year % 100));
|
|
rtc_write (RTC_MON_REG_ADDR, bin2bcd (tmp->tm_mon));
|
|
#ifdef CONFIG_RTC_MCP79411
|
|
rtc_write (RTC_DAY_REG_ADDR,
|
|
bin2bcd (tmp->tm_wday + 1) | MCP7941X_BIT_VBATEN);
|
|
#else
|
|
rtc_write (RTC_DAY_REG_ADDR, bin2bcd (tmp->tm_wday + 1));
|
|
#endif
|
|
rtc_write (RTC_DATE_REG_ADDR, bin2bcd (tmp->tm_mday));
|
|
rtc_write (RTC_HR_REG_ADDR, bin2bcd (tmp->tm_hour));
|
|
rtc_write (RTC_MIN_REG_ADDR, bin2bcd (tmp->tm_min));
|
|
#ifdef CONFIG_RTC_MCP79411
|
|
rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec) | MCP7941X_BIT_ST);
|
|
#else
|
|
rtc_write (RTC_SEC_REG_ADDR, bin2bcd (tmp->tm_sec));
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Reset the RTC. We setting the date back to 1970-01-01.
|
|
* We also enable the oscillator output on the SQW/OUT pin and program
|
|
* it for 32,768 Hz output. Note that according to the datasheet, turning
|
|
* on the square wave output increases the current drain on the backup
|
|
* battery to something between 480nA and 800nA.
|
|
*/
|
|
void rtc_reset (void)
|
|
{
|
|
rtc_write (RTC_SEC_REG_ADDR, 0x00); /* clearing Clock Halt */
|
|
rtc_write (RTC_CTL_REG_ADDR, RTC_CTL_BIT_SQWE | RTC_CTL_BIT_RS1 | RTC_CTL_BIT_RS0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Helper functions
|
|
*/
|
|
|
|
static
|
|
uchar rtc_read (uchar reg)
|
|
{
|
|
return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg));
|
|
}
|
|
|
|
|
|
static void rtc_write (uchar reg, uchar val)
|
|
{
|
|
i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
|
|
}
|
|
|
|
#endif /* CONFIG_CMD_DATE*/
|
|
|
|
#endif /* !CONFIG_DM_RTC */
|
|
|
|
#ifdef CONFIG_DM_RTC
|
|
static int ds1307_rtc_set(struct udevice *dev, const struct rtc_time *tm)
|
|
{
|
|
int ret;
|
|
uchar buf[7];
|
|
enum ds_type type = dev_get_driver_data(dev);
|
|
|
|
debug("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
|
|
tm->tm_hour, tm->tm_min, tm->tm_sec);
|
|
|
|
if (tm->tm_year < 1970 || tm->tm_year > 2069)
|
|
printf("WARNING: year should be between 1970 and 2069!\n");
|
|
|
|
buf[RTC_YR_REG_ADDR] = bin2bcd(tm->tm_year % 100);
|
|
buf[RTC_MON_REG_ADDR] = bin2bcd(tm->tm_mon);
|
|
buf[RTC_DAY_REG_ADDR] = bin2bcd(tm->tm_wday + 1);
|
|
buf[RTC_DATE_REG_ADDR] = bin2bcd(tm->tm_mday);
|
|
buf[RTC_HR_REG_ADDR] = bin2bcd(tm->tm_hour);
|
|
buf[RTC_MIN_REG_ADDR] = bin2bcd(tm->tm_min);
|
|
buf[RTC_SEC_REG_ADDR] = bin2bcd(tm->tm_sec);
|
|
|
|
if (type == mcp794xx) {
|
|
buf[RTC_DAY_REG_ADDR] |= MCP7941X_BIT_VBATEN;
|
|
buf[RTC_SEC_REG_ADDR] |= MCP7941X_BIT_ST;
|
|
}
|
|
|
|
ret = dm_i2c_write(dev, 0, buf, sizeof(buf));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ds1307_rtc_get(struct udevice *dev, struct rtc_time *tm)
|
|
{
|
|
int ret;
|
|
uchar buf[7];
|
|
enum ds_type type = dev_get_driver_data(dev);
|
|
|
|
read_rtc:
|
|
ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (type == ds_1307) {
|
|
if (buf[RTC_SEC_REG_ADDR] & RTC_SEC_BIT_CH) {
|
|
printf("### Warning: RTC oscillator has stopped\n");
|
|
/* clear the CH flag */
|
|
buf[RTC_SEC_REG_ADDR] &= ~RTC_SEC_BIT_CH;
|
|
dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
|
|
buf[RTC_SEC_REG_ADDR]);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (type == mcp794xx) {
|
|
/* make sure that the backup battery is enabled */
|
|
if (!(buf[RTC_DAY_REG_ADDR] & MCP7941X_BIT_VBATEN)) {
|
|
dm_i2c_reg_write(dev, RTC_DAY_REG_ADDR,
|
|
buf[RTC_DAY_REG_ADDR] |
|
|
MCP7941X_BIT_VBATEN);
|
|
}
|
|
|
|
/* clock halted? turn it on, so clock can tick. */
|
|
if (!(buf[RTC_SEC_REG_ADDR] & MCP7941X_BIT_ST)) {
|
|
dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR,
|
|
MCP7941X_BIT_ST);
|
|
printf("Started RTC\n");
|
|
goto read_rtc;
|
|
}
|
|
}
|
|
|
|
tm->tm_sec = bcd2bin(buf[RTC_SEC_REG_ADDR] & 0x7F);
|
|
tm->tm_min = bcd2bin(buf[RTC_MIN_REG_ADDR] & 0x7F);
|
|
tm->tm_hour = bcd2bin(buf[RTC_HR_REG_ADDR] & 0x3F);
|
|
tm->tm_mday = bcd2bin(buf[RTC_DATE_REG_ADDR] & 0x3F);
|
|
tm->tm_mon = bcd2bin(buf[RTC_MON_REG_ADDR] & 0x1F);
|
|
tm->tm_year = bcd2bin(buf[RTC_YR_REG_ADDR]) +
|
|
(bcd2bin(buf[RTC_YR_REG_ADDR]) >= 70 ?
|
|
1900 : 2000);
|
|
tm->tm_wday = bcd2bin((buf[RTC_DAY_REG_ADDR] - 1) & 0x07);
|
|
tm->tm_yday = 0;
|
|
tm->tm_isdst = 0;
|
|
|
|
debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
|
|
tm->tm_hour, tm->tm_min, tm->tm_sec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ds1307_rtc_reset(struct udevice *dev)
|
|
{
|
|
int ret;
|
|
|
|
/* clear Clock Halt */
|
|
ret = dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR, 0x00);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = dm_i2c_reg_write(dev, RTC_CTL_REG_ADDR,
|
|
RTC_CTL_BIT_SQWE | RTC_CTL_BIT_RS1 |
|
|
RTC_CTL_BIT_RS0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ds1307_probe(struct udevice *dev)
|
|
{
|
|
i2c_set_chip_flags(dev, DM_I2C_CHIP_RD_ADDRESS |
|
|
DM_I2C_CHIP_WR_ADDRESS);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rtc_ops ds1307_rtc_ops = {
|
|
.get = ds1307_rtc_get,
|
|
.set = ds1307_rtc_set,
|
|
.reset = ds1307_rtc_reset,
|
|
};
|
|
|
|
static const struct udevice_id ds1307_rtc_ids[] = {
|
|
{ .compatible = "dallas,ds1307", .data = ds_1307 },
|
|
{ .compatible = "dallas,ds1337", .data = ds_1337 },
|
|
{ .compatible = "dallas,ds1340", .data = ds_1340 },
|
|
{ .compatible = "microchip,mcp7941x", .data = mcp794xx },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(rtc_ds1307) = {
|
|
.name = "rtc-ds1307",
|
|
.id = UCLASS_RTC,
|
|
.probe = ds1307_probe,
|
|
.of_match = ds1307_rtc_ids,
|
|
.ops = &ds1307_rtc_ops,
|
|
};
|
|
#endif /* CONFIG_DM_RTC */
|
|
|