X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Frtc%2Fds1307.c;h=5e74b93b72bcd316ed24a0713a0513521b5c7ba0;hb=c1a2afa4082b4dd84ceb1754f1452c9529d6f390;hp=3be1da68731e34a45da24dd203d53ea3ef3e0885;hpb=c79e1c1ce9e5c1ddf6fac631e4741999f8a0cc58;p=u-boot diff --git a/drivers/rtc/ds1307.c b/drivers/rtc/ds1307.c index 3be1da6873..5e74b93b72 100644 --- a/drivers/rtc/ds1307.c +++ b/drivers/rtc/ds1307.c @@ -16,28 +16,16 @@ #include #include +#include #include #include -#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 +enum ds_type { + ds_1307, + ds_1337, + ds_1340, + mcp794xx, +}; /* * RTC register addresses @@ -62,6 +50,28 @@ #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); @@ -174,25 +184,8 @@ int rtc_set (struct rtc_time *tmp) */ void rtc_reset (void) { - struct rtc_time tmp; - 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); - - tmp.tm_year = 1970; - tmp.tm_mon = 1; - tmp.tm_mday= 1; - tmp.tm_hour = 0; - tmp.tm_min = 0; - tmp.tm_sec = 0; - - rtc_set(&tmp); - - printf ( "RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n", - tmp.tm_year, tmp.tm_mon, tmp.tm_mday, - tmp.tm_hour, tmp.tm_min, tmp.tm_sec); - - return; } @@ -211,4 +204,147 @@ static void rtc_write (uchar reg, uchar val) { i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val); } -#endif + +#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 */