From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/roms/u-boot/drivers/rtc/pcf8563.c | 122 +++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 qemu/roms/u-boot/drivers/rtc/pcf8563.c (limited to 'qemu/roms/u-boot/drivers/rtc/pcf8563.c') diff --git a/qemu/roms/u-boot/drivers/rtc/pcf8563.c b/qemu/roms/u-boot/drivers/rtc/pcf8563.c new file mode 100644 index 000000000..25fa7c5b1 --- /dev/null +++ b/qemu/roms/u-boot/drivers/rtc/pcf8563.c @@ -0,0 +1,122 @@ +/* + * (C) Copyright 2001 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * Date & Time support for Philips PCF8563 RTC + */ + +/* #define DEBUG */ + +#include +#include +#include +#include + +#if defined(CONFIG_CMD_DATE) + +static uchar rtc_read (uchar reg); +static void rtc_write (uchar reg, uchar val); + +/* ------------------------------------------------------------------------- */ + +int rtc_get (struct rtc_time *tmp) +{ + int rel = 0; + uchar sec, min, hour, mday, wday, mon_cent, year; + + sec = rtc_read (0x02); + min = rtc_read (0x03); + hour = rtc_read (0x04); + mday = rtc_read (0x05); + wday = rtc_read (0x06); + mon_cent= rtc_read (0x07); + year = rtc_read (0x08); + + debug ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x " + "hr: %02x min: %02x sec: %02x\n", + year, mon_cent, mday, wday, + hour, min, sec ); + debug ( "Alarms: wday: %02x day: %02x hour: %02x min: %02x\n", + rtc_read (0x0C), + rtc_read (0x0B), + rtc_read (0x0A), + rtc_read (0x09) ); + + if (sec & 0x80) { + puts ("### Warning: RTC Low Voltage - date/time not reliable\n"); + rel = -1; + } + + 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_cent & 0x1F); + tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 1900 : 2000); + tmp->tm_wday = bcd2bin (wday & 0x07); + tmp->tm_yday = 0; + tmp->tm_isdst= 0; + + debug ( "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; +} + +int rtc_set (struct rtc_time *tmp) +{ + uchar century; + + debug ( "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); + + rtc_write (0x08, bin2bcd(tmp->tm_year % 100)); + + century = (tmp->tm_year >= 2000) ? 0 : 0x80; + rtc_write (0x07, bin2bcd(tmp->tm_mon) | century); + + rtc_write (0x06, bin2bcd(tmp->tm_wday)); + rtc_write (0x05, bin2bcd(tmp->tm_mday)); + rtc_write (0x04, bin2bcd(tmp->tm_hour)); + rtc_write (0x03, bin2bcd(tmp->tm_min )); + rtc_write (0x02, bin2bcd(tmp->tm_sec )); + + return 0; +} + +void rtc_reset (void) +{ + /* clear all control & status registers */ + rtc_write (0x00, 0x00); + rtc_write (0x01, 0x00); + rtc_write (0x0D, 0x00); + + /* clear Voltage Low bit */ + rtc_write (0x02, rtc_read (0x02) & 0x7F); + + /* reset all alarms */ + rtc_write (0x09, 0x00); + rtc_write (0x0A, 0x00); + rtc_write (0x0B, 0x00); + rtc_write (0x0C, 0x00); +} + +/* ------------------------------------------------------------------------- */ + +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 -- cgit 1.2.3-korg