diff options
Diffstat (limited to 'src/drivers/pc80/mc146818rtc.c')
| -rw-r--r-- | src/drivers/pc80/mc146818rtc.c | 87 |
1 files changed, 67 insertions, 20 deletions
diff --git a/src/drivers/pc80/mc146818rtc.c b/src/drivers/pc80/mc146818rtc.c index 014a8c9402..84abd4309c 100644 --- a/src/drivers/pc80/mc146818rtc.c +++ b/src/drivers/pc80/mc146818rtc.c @@ -1,28 +1,51 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 The Chromium OS Authors. All rights reserved. + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/acpi.h> +#include <bcd.h> #include <stdint.h> #include <version.h> #include <console/console.h> #include <pc80/mc146818rtc.h> #include <boot/coreboot_tables.h> +#include <rtc.h> #include <string.h> #if CONFIG_USE_OPTION_TABLE #include "option_table.h" #include <cbfs.h> #endif -#include <arch/acpi.h> -static void cmos_update_date(u8 has_century) +static void cmos_reset_date(u8 has_century) { /* Now setup a default date equals to the build date */ - cmos_write(0, RTC_CLK_SECOND); - cmos_write(0, RTC_CLK_MINUTE); - cmos_write(1, RTC_CLK_HOUR); - cmos_write(coreboot_build_date.weekday + 1, RTC_CLK_DAYOFWEEK); - cmos_write(coreboot_build_date.day, RTC_CLK_DAYOFMONTH); - cmos_write(coreboot_build_date.month, RTC_CLK_MONTH); - cmos_write(coreboot_build_date.year, RTC_CLK_YEAR); - if (has_century) - cmos_write(coreboot_build_date.century, RTC_CLK_ALTCENTURY); + struct rtc_time time = { + .sec = 0, + .min = 0, + .hour = 1, + .mday = bcd2bin(coreboot_build_date.day), + .mon = bcd2bin(coreboot_build_date.month), + .year = (bcd2bin(coreboot_build_date.century) * 100) + + bcd2bin(coreboot_build_date.year), + .wday = bcd2bin(coreboot_build_date.weekday) + }; + rtc_set(&time, has_century); } #if CONFIG_USE_OPTION_TABLE @@ -50,15 +73,8 @@ static void cmos_set_checksum(int range_start, int range_end, int cks_loc) } #endif -#if CONFIG_ARCH_X86 #define RTC_CONTROL_DEFAULT (RTC_24H) #define RTC_FREQ_SELECT_DEFAULT (RTC_REF_CLCK_32KHZ | RTC_RATE_1024HZ) -#else -#if CONFIG_ARCH_ALPHA -#define RTC_CONTROL_DEFAULT (RTC_SQWE | RTC_24H) -#define RTC_FREQ_SELECT_DEFAULT (RTC_REF_CLCK_32KHZ | RTC_RATE_1024HZ) -#endif -#endif #ifndef __SMM__ void cmos_init(int invalid) @@ -107,7 +123,7 @@ void cmos_init(int invalid) cmos_write(0, i); #endif if (cmos_invalid) - cmos_update_date(RTC_HAS_NO_ALTCENTURY); + cmos_reset_date(RTC_HAS_NO_ALTCENTURY); printk(BIOS_WARNING, "RTC:%s%s%s%s\n", invalid?" Clear requested":"", @@ -323,5 +339,36 @@ void cmos_check_update_date(u8 has_century) * if the date is valid. */ if (century > 0x99 || year > 0x99) /* Invalid date */ - cmos_update_date(has_century); + cmos_reset_date(has_century); +} + +int rtc_set(const struct rtc_time *time, u8 has_century) +{ + cmos_write(bin2bcd(time->sec), RTC_CLK_SECOND); + cmos_write(bin2bcd(time->min), RTC_CLK_MINUTE); + cmos_write(bin2bcd(time->hour), RTC_CLK_HOUR); + cmos_write(bin2bcd(time->mday), RTC_CLK_DAYOFMONTH); + cmos_write(bin2bcd(time->mon), RTC_CLK_MONTH); + cmos_write(bin2bcd(time->year % 100), RTC_CLK_YEAR); + if (has_century) + cmos_write(bin2bcd(time->year / 100), + RTC_CLK_ALTCENTURY); + cmos_write(bin2bcd(time->wday + 1), RTC_CLK_DAYOFWEEK); + return 0; +} + +int rtc_get(struct rtc_time *time, u8 has_century) +{ + time->sec = bcd2bin(cmos_read(RTC_CLK_SECOND)); + time->min = bcd2bin(cmos_read(RTC_CLK_MINUTE)); + time->hour = bcd2bin(cmos_read(RTC_CLK_HOUR)); + time->mday = bcd2bin(cmos_read(RTC_CLK_DAYOFMONTH)); + time->mon = bcd2bin(cmos_read(RTC_CLK_MONTH)); + time->year = bcd2bin(cmos_read(RTC_CLK_YEAR)); + if (has_century) + time->year += bcd2bin(cmos_read(RTC_CLK_ALTCENTURY)) * 100; + else + time->year += 2000; + time->wday = bcd2bin(cmos_read(RTC_CLK_DAYOFWEEK)) - 1; + return 0; } |