X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Frtc%2Fds1307.c;h=a33f47525f787e95c2c7b83f647ff1ea30771b2a;hb=0ba121668cd68c71c39b931b05ad73247266da95;hp=03ab1a8c5d38c1ca8013aeabe304431fb8eb558d;hpb=412921d29e11adcb14bd1d6c5b7145af0dd10599;p=oweals%2Fu-boot.git diff --git a/drivers/rtc/ds1307.c b/drivers/rtc/ds1307.c index 03ab1a8c5d..a33f47525f 100644 --- a/drivers/rtc/ds1307.c +++ b/drivers/rtc/ds1307.c @@ -1,10 +1,9 @@ +// 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 - * - * SPDX-License-Identifier: GPL-2.0+ */ /* @@ -16,28 +15,17 @@ #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, + m41t11, + mcp794xx, +}; /* * RTC register addresses @@ -58,6 +46,30 @@ #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 + +/*---------------------------------------------------------------------*/ +#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); @@ -69,6 +81,9 @@ 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); @@ -81,6 +96,7 @@ int rtc_get (struct rtc_time *tmp) "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 */ @@ -88,6 +104,23 @@ int rtc_get (struct rtc_time *tmp) 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); @@ -121,11 +154,20 @@ int rtc_set (struct rtc_time *tmp) 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; } @@ -140,25 +182,8 @@ 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; } @@ -177,4 +202,158 @@ static void rtc_write (uchar reg, uchar val) { i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val); } -#endif + +#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 == m41t11) { + /* clock halted? turn it on, so clock can tick. */ + if (buf[RTC_SEC_REG_ADDR] & RTC_SEC_BIT_CH) { + buf[RTC_SEC_REG_ADDR] &= ~RTC_SEC_BIT_CH; + dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR, + MCP7941X_BIT_ST); + dm_i2c_reg_write(dev, RTC_SEC_REG_ADDR, + buf[RTC_SEC_REG_ADDR]); + goto read_rtc; + } + } + + 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 }, + { .compatible = "st,m41t11", .data = m41t11 }, + { } +}; + +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 */