diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rtc/Makefile | 2 | ||||
| -rw-r--r-- | drivers/rtc/bf5xx_rtc.c | 143 | ||||
| -rw-r--r-- | drivers/rtc/bfin_rtc.c | 117 |
3 files changed, 118 insertions, 144 deletions
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 8c7f148..2af2bf4 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -28,7 +28,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)librtc.a COBJS-y += date.o -COBJS-y += bf5xx_rtc.o +COBJS-y += bfin_rtc.o COBJS-y += ds12887.o COBJS-y += ds1302.o COBJS-y += ds1306.o diff --git a/drivers/rtc/bf5xx_rtc.c b/drivers/rtc/bf5xx_rtc.c deleted file mode 100644 index 8856bb9..0000000 --- a/drivers/rtc/bf5xx_rtc.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * (C) Copyright 2001 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * 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 - * Real Time Clock interface of ADI21535 (Blackfin) for uCLinux - * - * Copyright (C) 2003 Motorola Corporation. All rights reserved. - * Richard Xiao (A2590C@email.mot.com) - * - * Copyright (C) 1996 Paul Gortmaker - * - * - * Based on other minimal char device drivers, like Alan's - * watchdog, Ted's random, etc. etc. - * - * 1.07 Paul Gortmaker. - * 1.08 Miquel van Smoorenburg: disallow certain things on the - * DEC Alpha as the CMOS clock is also used for other things. - * 1.09 Nikita Schmidt: epoch support and some Alpha cleanup. - * 1.09a Pete Zaitcev: Sun SPARC - * 1.09b Jeff Garzik: Modularize, init cleanup - * 1.09c Jeff Garzik: SMP cleanup - * 1.10 Paul Barton-Davis: add support for async I/O - * 1.10a Andrea Arcangeli: Alpha updates - * 1.10b Andrew Morton: SMP lock fix - * 1.10c Cesar Barros: SMP locking fixes and cleanup - * 1.10d Paul Gortmaker: delete paranoia check in rtc_exit - * 1.10e LG Soft India: Register access is different in BF533. - */ - -#include <common.h> -#include <command.h> -#include <rtc.h> - -#if defined(CONFIG_RTC_BFIN) && defined(CONFIG_CMD_DATE) - -#include <asm/blackfin.h> -#include <asm/arch/bf5xx_rtc.h> - -void rtc_reset(void) -{ - return; /* nothing to do */ -} - -/* Wait for pending writes to complete */ -void wait_for_complete(void) -{ - while (!(*(volatile unsigned short *)RTC_ISTAT & 0x8000)) { - printf(""); - } - *(volatile unsigned short *)RTC_ISTAT = 0x8000; -} - -/* Enable the RTC prescaler enable register */ -void rtc_init() -{ - *(volatile unsigned short *)RTC_PREN = 0x1; - wait_for_complete(); -} - -/* Set the time. Get the time_in_secs which is the number of seconds since Jan 1970 and set the RTC registers - * based on this value. - */ -void rtc_set(struct rtc_time *tmp) -{ - unsigned long n_days_1970 = 0; - unsigned long n_secs_rem = 0; - unsigned long n_hrs = 0; - unsigned long n_mins = 0; - unsigned long n_secs = 0; - unsigned long time_in_secs; - - if (tmp == NULL) { - printf("Error setting the date/time \n"); - return; - } - - time_in_secs = - mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_hour, - tmp->tm_min, tmp->tm_sec); - - /* Compute no. of days since 1970 */ - n_days_1970 = (unsigned long)(time_in_secs / (NUM_SECS_IN_DAY)); - - /* From the remining secs, compute the hrs(0-23), mins(0-59) and secs(0-59) */ - n_secs_rem = (unsigned long)(time_in_secs % (NUM_SECS_IN_DAY)); - n_hrs = n_secs_rem / (NUM_SECS_IN_HOUR); - n_secs_rem = n_secs_rem % (NUM_SECS_IN_HOUR); - n_mins = n_secs_rem / (NUM_SECS_IN_MIN); - n_secs = n_secs_rem % (NUM_SECS_IN_MIN); - - /* Store the new time in the RTC_STAT register */ - *(volatile unsigned long *)RTC_STAT = - ((n_days_1970 << DAY_BITS_OFF) | (n_hrs << HOUR_BITS_OFF) | - (n_mins << MIN_BITS_OFF) | (n_secs << SEC_BITS_OFF)); - - wait_for_complete(); -} - -/* Read the time from the RTC_STAT. time_in_seconds is seconds since Jan 1970 */ -void rtc_get(struct rtc_time *tmp) -{ - unsigned long cur_rtc_stat = 0; - unsigned long time_in_sec; - unsigned long tm_sec = 0, tm_min = 0, tm_hour = 0, tm_day = 0; - - if (tmp == NULL) { - printf("Error getting the date/time \n"); - return; - } - - /* Read the RTC_STAT register */ - cur_rtc_stat = *(volatile unsigned long *)RTC_STAT; - - /* Get the secs (0-59), mins (0-59), hrs (0-23) and the days since Jan 1970 */ - tm_sec = (cur_rtc_stat >> SEC_BITS_OFF) & 0x3f; - tm_min = (cur_rtc_stat >> MIN_BITS_OFF) & 0x3f; - tm_hour = (cur_rtc_stat >> HOUR_BITS_OFF) & 0x1f; - tm_day = (cur_rtc_stat >> DAY_BITS_OFF) & 0x7fff; - - /* Calculate the total number of seconds since Jan 1970 */ - time_in_sec = (tm_sec) + - MIN_TO_SECS(tm_min) + HRS_TO_SECS(tm_hour) + DAYS_TO_SECS(tm_day); - to_tm(time_in_sec, tmp); -} -#endif diff --git a/drivers/rtc/bfin_rtc.c b/drivers/rtc/bfin_rtc.c new file mode 100644 index 0000000..5755a20 --- /dev/null +++ b/drivers/rtc/bfin_rtc.c @@ -0,0 +1,117 @@ +/* + * Copyright (c) 2004-2008 Analog Devices Inc. + * + * (C) Copyright 2001 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Licensed under the GPL-2 or later. + */ + +#include <common.h> +#include <command.h> +#include <rtc.h> + +#if defined(CONFIG_RTC_BFIN) && defined(CONFIG_CMD_DATE) + +#include <asm/blackfin.h> +#include <asm/mach-common/bits/rtc.h> + +#define pr_stamp() debug("%s:%s:%i: here i am\n", __FILE__, __func__, __LINE__) + +#define MIN_TO_SECS(x) (60 * (x)) +#define HRS_TO_SECS(x) (60 * MIN_TO_SECS(x)) +#define DAYS_TO_SECS(x) (24 * HRS_TO_SECS(x)) + +#define NUM_SECS_IN_MIN MIN_TO_SECS(1) +#define NUM_SECS_IN_HR HRS_TO_SECS(1) +#define NUM_SECS_IN_DAY DAYS_TO_SECS(1) + +/* Our on-chip RTC has no notion of "reset" */ +void rtc_reset(void) +{ + return; +} + +/* Wait for pending writes to complete */ +static void wait_for_complete(void) +{ + pr_stamp(); + while (!(bfin_read_RTC_ISTAT() & WRITE_COMPLETE)) + if (!(bfin_read_RTC_ISTAT() & WRITE_PENDING)) + break; + bfin_write_RTC_ISTAT(WRITE_COMPLETE); +} + +/* Enable the RTC prescaler enable register */ +int rtc_init(void) +{ + pr_stamp(); + bfin_write_RTC_PREN(0x1); + return 0; +} + +/* Set the time. Get the time_in_secs which is the number of seconds since Jan 1970 and set the RTC registers + * based on this value. + */ +void rtc_set(struct rtc_time *tmp) +{ + unsigned long remain, days, hrs, mins, secs; + + pr_stamp(); + + if (tmp == NULL) { + puts("Error setting the date/time\n"); + return; + } + + wait_for_complete(); + + /* Calculate number of seconds this incoming time represents */ + remain = mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday, + tmp->tm_hour, tmp->tm_min, tmp->tm_sec); + + /* Figure out how many days since epoch */ + days = remain / NUM_SECS_IN_DAY; + + /* From the remaining secs, compute the hrs(0-23), mins(0-59) and secs(0-59) */ + remain = remain % NUM_SECS_IN_DAY; + hrs = remain / NUM_SECS_IN_HR; + remain = remain % NUM_SECS_IN_HR; + mins = remain / NUM_SECS_IN_MIN; + secs = remain % NUM_SECS_IN_MIN; + + /* Encode these time values into our RTC_STAT register */ + bfin_write_RTC_STAT(SET_ALARM(days, hrs, mins, secs)); +} + +/* Read the time from the RTC_STAT. time_in_seconds is seconds since Jan 1970 */ +void rtc_get(struct rtc_time *tmp) +{ + uint32_t cur_rtc_stat; + int time_in_sec; + int tm_sec, tm_min, tm_hr, tm_day; + + pr_stamp(); + + if (tmp == NULL) { + puts("Error getting the date/time\n"); + return; + } + + wait_for_complete(); + + /* Read the RTC_STAT register */ + cur_rtc_stat = bfin_read_RTC_STAT(); + + /* Convert our encoded format into actual time values */ + tm_sec = (cur_rtc_stat & RTC_SEC) >> RTC_SEC_P; + tm_min = (cur_rtc_stat & RTC_MIN) >> RTC_MIN_P; + tm_hr = (cur_rtc_stat & RTC_HR ) >> RTC_HR_P; + tm_day = (cur_rtc_stat & RTC_DAY) >> RTC_DAY_P; + + /* Calculate the total number of seconds since epoch */ + time_in_sec = (tm_sec) + MIN_TO_SECS(tm_min) + HRS_TO_SECS(tm_hr) + DAYS_TO_SECS(tm_day); + to_tm(time_in_sec, tmp); +} + +#endif |