X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Frtc%2Fmc146818.c;h=4df9eda086f7ae9127c00496954e12bffe2a9e00;hb=3f14f814e79f5160e91a107fcac56d577867feac;hp=70f7017a3f4e46460a39f1dd0f9775e158f1370d;hpb=27f33e9f45ef7f9685cbdc65066a1828e85dde4f;p=u-boot diff --git a/drivers/rtc/mc146818.c b/drivers/rtc/mc146818.c index 70f7017a3f..4df9eda086 100644 --- a/drivers/rtc/mc146818.c +++ b/drivers/rtc/mc146818.c @@ -2,179 +2,306 @@ * (C) Copyright 2001 * Denis Peter MPL AG Switzerland. d.peter@mpl.ch * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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. - * - * This program is distributed in the hope that 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ /* * Date & Time support for the MC146818 (PIXX4) RTC */ -/*#define DEBUG*/ - #include #include +#include #include -#if defined(CONFIG_RTC_MC146818) && defined(CONFIG_CMD_DATE) +#if defined(CONFIG_X86) || defined(CONFIG_MALTA) +#include +#define in8(p) inb(p) +#define out8(p, v) outb(v, p) +#endif + +#if defined(CONFIG_CMD_DATE) + +/* Set this to 1 to clear the CMOS RAM */ +#define CLEAR_CMOS 0 -static uchar rtc_read (uchar reg); -static void rtc_write (uchar reg, uchar val); -static uchar bin2bcd (unsigned int n); -static unsigned bcd2bin(uchar c); +#define RTC_PORT_MC146818 CONFIG_SYS_ISA_IO_BASE_ADDRESS + 0x70 +#define RTC_SECONDS 0x00 +#define RTC_SECONDS_ALARM 0x01 +#define RTC_MINUTES 0x02 +#define RTC_MINUTES_ALARM 0x03 +#define RTC_HOURS 0x04 +#define RTC_HOURS_ALARM 0x05 +#define RTC_DAY_OF_WEEK 0x06 +#define RTC_DATE_OF_MONTH 0x07 +#define RTC_MONTH 0x08 +#define RTC_YEAR 0x09 +#define RTC_CONFIG_A 0x0a +#define RTC_CONFIG_B 0x0b +#define RTC_CONFIG_C 0x0c +#define RTC_CONFIG_D 0x0d +#define RTC_REG_SIZE 0x80 -#define RTC_PORT_MC146818 CFG_ISA_IO_BASE_ADDRESS + 0x70 -#define RTC_SECONDS 0x00 -#define RTC_SECONDS_ALARM 0x01 -#define RTC_MINUTES 0x02 -#define RTC_MINUTES_ALARM 0x03 -#define RTC_HOURS 0x04 -#define RTC_HOURS_ALARM 0x05 -#define RTC_DAY_OF_WEEK 0x06 -#define RTC_DATE_OF_MONTH 0x07 -#define RTC_MONTH 0x08 -#define RTC_YEAR 0x09 -#define RTC_CONFIG_A 0x0A -#define RTC_CONFIG_B 0x0B -#define RTC_CONFIG_C 0x0C -#define RTC_CONFIG_D 0x0D +#define RTC_CONFIG_A_REF_CLCK_32KHZ (1 << 5) +#define RTC_CONFIG_A_RATE_1024HZ 6 +#define RTC_CONFIG_B_24H (1 << 1) -/* ------------------------------------------------------------------------- */ +#define RTC_CONFIG_D_VALID_RAM_AND_TIME 0x80 -int rtc_get (struct rtc_time *tmp) +static int mc146818_read8(int reg) { - uchar sec, min, hour, mday, wday, mon, year; - /* here check if rtc can be accessed */ - while((rtc_read(RTC_CONFIG_A)&0x80)==0x80); - sec = rtc_read (RTC_SECONDS); - min = rtc_read (RTC_MINUTES); - hour = rtc_read (RTC_HOURS); - mday = rtc_read (RTC_DATE_OF_MONTH); - wday = rtc_read (RTC_DAY_OF_WEEK); - mon = rtc_read (RTC_MONTH); - year = rtc_read (RTC_YEAR); -#ifdef CONFIG_AMIGAONEG3SE - wday -= 1; /* VIA 686 stores Sunday = 1, Monday = 2, ... */ +#ifdef CONFIG_SYS_RTC_REG_BASE_ADDR + return in8(CONFIG_SYS_RTC_REG_BASE_ADDR + reg); +#else + int ofs = 0; + + if (reg >= 128) { + ofs = 2; + reg -= 128; + } + out8(RTC_PORT_MC146818 + ofs, reg); + + return in8(RTC_PORT_MC146818 + ofs + 1); +#endif +} + +static void mc146818_write8(int reg, uchar val) +{ +#ifdef CONFIG_SYS_RTC_REG_BASE_ADDR + out8(CONFIG_SYS_RTC_REG_BASE_ADDR + reg, val); +#else + int ofs = 0; + + if (reg >= 128) { + ofs = 2; + reg -= 128; + } + out8(RTC_PORT_MC146818 + ofs, reg); + out8(RTC_PORT_MC146818 + ofs + 1, val); #endif +} + +static int mc146818_get(struct rtc_time *tmp) +{ + uchar sec, min, hour, mday, wday, mon, year; + + /* here check if rtc can be accessed */ + while ((mc146818_read8(RTC_CONFIG_A) & 0x80) == 0x80) + ; + + sec = mc146818_read8(RTC_SECONDS); + min = mc146818_read8(RTC_MINUTES); + hour = mc146818_read8(RTC_HOURS); + mday = mc146818_read8(RTC_DATE_OF_MONTH); + wday = mc146818_read8(RTC_DAY_OF_WEEK); + mon = mc146818_read8(RTC_MONTH); + year = mc146818_read8(RTC_YEAR); #ifdef RTC_DEBUG - printf ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x " - "hr: %02x min: %02x sec: %02x\n", - year, mon, mday, wday, - hour, min, sec ); - printf ( "Alarms: month: %02x hour: %02x min: %02x sec: %02x\n", - rtc_read (RTC_CONFIG_D) & 0x3F, - rtc_read (RTC_HOURS_ALARM), - rtc_read (RTC_MINUTES_ALARM), - rtc_read (RTC_SECONDS_ALARM) ); + printf("Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x hr: %02x min: %02x sec: %02x\n", + year, mon, mday, wday, hour, min, sec); + printf("Alarms: month: %02x hour: %02x min: %02x sec: %02x\n", + mc146818_read8(RTC_CONFIG_D) & 0x3f, + mc146818_read8(RTC_HOURS_ALARM), + mc146818_read8(RTC_MINUTES_ALARM), + mc146818_read8(RTC_SECONDS_ALARM)); #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); - tmp->tm_wday = bcd2bin (wday & 0x07); - if(tmp->tm_year<70) - tmp->tm_year+=2000; + 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); + tmp->tm_wday = bcd2bin(wday & 0x07); + + if (tmp->tm_year < 70) + tmp->tm_year += 2000; else - tmp->tm_year+=1900; + tmp->tm_year += 1900; + tmp->tm_yday = 0; - tmp->tm_isdst= 0; + tmp->tm_isdst = 0; #ifdef RTC_DEBUG - printf ( "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); + printf("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); #endif return 0; } -void rtc_set (struct rtc_time *tmp) +static int mc146818_set(struct rtc_time *tmp) { #ifdef RTC_DEBUG - printf ( "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); + printf("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); #endif - rtc_write(RTC_CONFIG_B,0x82); /* disables the RTC to update the regs */ + /* Disable the RTC to update the regs */ + mc146818_write8(RTC_CONFIG_B, 0x82); - rtc_write (RTC_YEAR, bin2bcd(tmp->tm_year % 100)); - rtc_write (RTC_MONTH, bin2bcd(tmp->tm_mon)); -#ifdef CONFIG_AMIGAONEG3SE - rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday)+1); -#else - rtc_write (RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday)); + mc146818_write8(RTC_YEAR, bin2bcd(tmp->tm_year % 100)); + mc146818_write8(RTC_MONTH, bin2bcd(tmp->tm_mon)); + mc146818_write8(RTC_DAY_OF_WEEK, bin2bcd(tmp->tm_wday)); + mc146818_write8(RTC_DATE_OF_MONTH, bin2bcd(tmp->tm_mday)); + mc146818_write8(RTC_HOURS, bin2bcd(tmp->tm_hour)); + mc146818_write8(RTC_MINUTES, bin2bcd(tmp->tm_min)); + mc146818_write8(RTC_SECONDS, bin2bcd(tmp->tm_sec)); + + /* Enable the RTC to update the regs */ + mc146818_write8(RTC_CONFIG_B, 0x02); + + return 0; +} + +static void mc146818_reset(void) +{ + /* Disable the RTC to update the regs */ + mc146818_write8(RTC_CONFIG_B, 0x82); + + /* Normal OP */ + mc146818_write8(RTC_CONFIG_A, 0x20); + mc146818_write8(RTC_CONFIG_B, 0x00); + mc146818_write8(RTC_CONFIG_B, 0x00); + + /* Enable the RTC to update the regs */ + mc146818_write8(RTC_CONFIG_B, 0x02); +} + +static void mc146818_init(void) +{ +#if CLEAR_CMOS + int i; + + rtc_write8(RTC_SECONDS_ALARM, 0); + rtc_write8(RTC_MINUTES_ALARM, 0); + rtc_write8(RTC_HOURS_ALARM, 0); + for (i = RTC_CONFIG_A; i < RTC_REG_SIZE; i++) + rtc_write8(i, 0); + printf("RTC: zeroing CMOS RAM\n"); #endif - rtc_write (RTC_DATE_OF_MONTH, bin2bcd(tmp->tm_mday)); - rtc_write (RTC_HOURS, bin2bcd(tmp->tm_hour)); - rtc_write (RTC_MINUTES, bin2bcd(tmp->tm_min )); - rtc_write (RTC_SECONDS, bin2bcd(tmp->tm_sec )); - rtc_write(RTC_CONFIG_B,0x02); /* enables the RTC to update the regs */ + /* Setup the real time clock */ + mc146818_write8(RTC_CONFIG_B, RTC_CONFIG_B_24H); + /* Setup the frequency it operates at */ + mc146818_write8(RTC_CONFIG_A, RTC_CONFIG_A_REF_CLCK_32KHZ | + RTC_CONFIG_A_RATE_1024HZ); + /* Ensure all reserved bits are 0 in register D */ + mc146818_write8(RTC_CONFIG_D, RTC_CONFIG_D_VALID_RAM_AND_TIME); + + /* Clear any pending interrupts */ + mc146818_read8(RTC_CONFIG_C); } +#endif /* CONFIG_CMD_DATE */ + +#ifdef CONFIG_DM_RTC -void rtc_reset (void) +static int rtc_mc146818_get(struct udevice *dev, struct rtc_time *time) { - rtc_write(RTC_CONFIG_B,0x82); /* disables the RTC to update the regs */ - rtc_write(RTC_CONFIG_A,0x20); /* Normal OP */ - rtc_write(RTC_CONFIG_B,0x00); - rtc_write(RTC_CONFIG_B,0x00); - rtc_write(RTC_CONFIG_B,0x02); /* enables the RTC to update the regs */ + return mc146818_get(time); } -/* ------------------------------------------------------------------------- */ +static int rtc_mc146818_set(struct udevice *dev, const struct rtc_time *time) +{ + return mc146818_set((struct rtc_time *)time); +} -#ifdef CFG_RTC_REG_BASE_ADDR -/* - * use direct memory access - */ -static uchar rtc_read (uchar reg) +static int rtc_mc146818_reset(struct udevice *dev) { - return(in8(CFG_RTC_REG_BASE_ADDR+reg)); + mc146818_reset(); + + return 0; } -static void rtc_write (uchar reg, uchar val) +static int rtc_mc146818_read8(struct udevice *dev, unsigned int reg) { - out8(CFG_RTC_REG_BASE_ADDR+reg, val); + return mc146818_read8(reg); } -#else -static uchar rtc_read (uchar reg) + +static int rtc_mc146818_write8(struct udevice *dev, unsigned int reg, int val) { - out8(RTC_PORT_MC146818,reg); - return(in8(RTC_PORT_MC146818+1)); + mc146818_write8(reg, val); + + return 0; } -static void rtc_write (uchar reg, uchar val) +static int rtc_mc146818_probe(struct udevice *dev) { - out8(RTC_PORT_MC146818,reg); - out8(RTC_PORT_MC146818+1,val); + mc146818_init(); + + return 0; } -#endif -static unsigned bcd2bin (uchar n) +static const struct rtc_ops rtc_mc146818_ops = { + .get = rtc_mc146818_get, + .set = rtc_mc146818_set, + .reset = rtc_mc146818_reset, + .read8 = rtc_mc146818_read8, + .write8 = rtc_mc146818_write8, +}; + +static const struct udevice_id rtc_mc146818_ids[] = { + { .compatible = "motorola,mc146818" }, + { } +}; + +U_BOOT_DRIVER(rtc_mc146818) = { + .name = "rtc_mc146818", + .id = UCLASS_RTC, + .of_match = rtc_mc146818_ids, + .probe = rtc_mc146818_probe, + .ops = &rtc_mc146818_ops, +}; + +#else /* !CONFIG_DM_RTC */ + +int rtc_get(struct rtc_time *tmp) { - return ((((n >> 4) & 0x0F) * 10) + (n & 0x0F)); + return mc146818_get(tmp); } -static unsigned char bin2bcd (unsigned int n) +int rtc_set(struct rtc_time *tmp) { - return (((n / 10) << 4) | (n % 10)); + return mc146818_set(tmp); } -#endif +void rtc_reset(void) +{ + mc146818_reset(); +} + +int rtc_read8(int reg) +{ + return mc146818_read8(reg); +} + +void rtc_write8(int reg, uchar val) +{ + mc146818_write8(reg, val); +} + +u32 rtc_read32(int reg) +{ + u32 value = 0; + int i; + + for (i = 0; i < sizeof(value); i++) + value |= rtc_read8(reg + i) << (i << 3); + + return value; +} + +void rtc_write32(int reg, u32 value) +{ + int i; + + for (i = 0; i < sizeof(value); i++) + rtc_write8(reg + i, (value >> (i << 3)) & 0xff); +} + +void rtc_init(void) +{ + mc146818_init(); +} + +#endif /* CONFIG_DM_RTC */