diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/rtc/ds164x.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/rtc/ds164x.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/qemu/roms/u-boot/drivers/rtc/ds164x.c b/qemu/roms/u-boot/drivers/rtc/ds164x.c deleted file mode 100644 index b91335442..000000000 --- a/qemu/roms/u-boot/drivers/rtc/ds164x.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * (C) Copyright 2002 - * ARIO Data Networks, Inc. dchiu@ariodata.com - * - * modified for DS164x: - * The LEOX team <team@leox.org>, http://www.leox.org - * - * Based on MontaVista DS1743 code and U-Boot mc146818 code - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * Date & Time support for the DS164x RTC - */ - -/* #define RTC_DEBUG */ - -#include <common.h> -#include <command.h> -#include <rtc.h> - - -#if defined(CONFIG_CMD_DATE) - -static uchar rtc_read(unsigned int addr ); -static void rtc_write(unsigned int addr, uchar val); - -#define RTC_EPOCH 2000 /* century */ - -/* - * DS164x registers layout - */ -#define RTC_BASE ( CONFIG_SYS_NVRAM_BASE_ADDR + CONFIG_SYS_NVRAM_SIZE ) - -#define RTC_YEAR ( RTC_BASE + 0x07 ) -#define RTC_MONTH ( RTC_BASE + 0x06 ) -#define RTC_DAY_OF_MONTH ( RTC_BASE + 0x05 ) -#define RTC_DAY_OF_WEEK ( RTC_BASE + 0x04 ) -#define RTC_HOURS ( RTC_BASE + 0x03 ) -#define RTC_MINUTES ( RTC_BASE + 0x02 ) -#define RTC_SECONDS ( RTC_BASE + 0x01 ) -#define RTC_CONTROL ( RTC_BASE + 0x00 ) - -#define RTC_CONTROLA RTC_CONTROL /* W=bit6, R=bit5 */ -#define RTC_CA_WRITE 0x80 -#define RTC_CA_READ 0x40 -#define RTC_CONTROLB RTC_SECONDS /* OSC=bit7 */ -#define RTC_CB_OSC_DISABLE 0x80 -#define RTC_CONTROLC RTC_DAY_OF_WEEK /* FT=bit6 */ -#define RTC_CC_FREQ_TEST 0x40 - -/* ------------------------------------------------------------------------- */ - -int rtc_get( struct rtc_time *tmp ) -{ - uchar sec, min, hour; - uchar mday, wday, mon, year; - - uchar reg_a; - - reg_a = rtc_read( RTC_CONTROLA ); - /* lock clock registers for read */ - rtc_write( RTC_CONTROLA, ( reg_a | RTC_CA_READ )); - - sec = rtc_read( RTC_SECONDS ); - min = rtc_read( RTC_MINUTES ); - hour = rtc_read( RTC_HOURS ); - mday = rtc_read( RTC_DAY_OF_MONTH ); - wday = rtc_read( RTC_DAY_OF_WEEK ); - mon = rtc_read( RTC_MONTH ); - year = rtc_read( RTC_YEAR ); - - /* unlock clock registers after read */ - rtc_write( RTC_CONTROLA, ( reg_a & ~RTC_CA_READ )); - -#ifdef RTC_DEBUG - printf( "Get RTC year: %02x mon: %02x mday: %02x wday: %02x " - "hr: %02x min: %02x sec: %02x\n", - year, mon, mday, wday, - hour, min, sec ); -#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_wday = bcd2bin( wday & 0x07 ); - - /* glue year in century (2000) */ - tmp->tm_year = bcd2bin( year ) + RTC_EPOCH; - - tmp->tm_yday = 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 ); -#endif - - return 0; -} - -int rtc_set( struct rtc_time *tmp ) -{ - uchar reg_a; - -#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); -#endif - /* lock clock registers for write */ - reg_a = rtc_read( RTC_CONTROLA ); - rtc_write( RTC_CONTROLA, ( reg_a | RTC_CA_WRITE )); - - rtc_write( RTC_MONTH, bin2bcd( tmp->tm_mon )); - - rtc_write( RTC_DAY_OF_WEEK, bin2bcd( tmp->tm_wday )); - rtc_write( RTC_DAY_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 )); - - /* break year in century */ - rtc_write( RTC_YEAR, bin2bcd( tmp->tm_year % 100 )); - - /* unlock clock registers after read */ - rtc_write( RTC_CONTROLA, ( reg_a & ~RTC_CA_WRITE )); - - return 0; -} - -void rtc_reset (void) -{ - uchar reg_a, reg_b; - - reg_a = rtc_read( RTC_CONTROLA ); - reg_b = rtc_read( RTC_CONTROLB ); - - if ( reg_b & RTC_CB_OSC_DISABLE ) - { - printf( "real-time-clock was stopped. Now starting...\n" ); - reg_a |= RTC_CA_WRITE; - reg_b &= ~RTC_CB_OSC_DISABLE; - - rtc_write( RTC_CONTROLA, reg_a ); - rtc_write( RTC_CONTROLB, reg_b ); - } - - /* make sure read/write clock register bits are cleared */ - reg_a &= ~( RTC_CA_WRITE | RTC_CA_READ ); - rtc_write( RTC_CONTROLA, reg_a ); -} - -/* ------------------------------------------------------------------------- */ - -static uchar rtc_read( unsigned int addr ) -{ - uchar val = *(volatile unsigned char*)(addr); - -#ifdef RTC_DEBUG - printf( "rtc_read: %x:%x\n", addr, val ); -#endif - return( val ); -} - -static void rtc_write( unsigned int addr, uchar val ) -{ -#ifdef RTC_DEBUG - printf( "rtc_write: %x:%x\n", addr, val ); -#endif - *(volatile unsigned char*)(addr) = val; -} - -#endif |