LXR uboot/drivers/rtc/davinci.c

   1/*
   2 * (C) Copyright 2011 DENX Software Engineering GmbH
   3 * Heiko Schocher <hs@denx.de>
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7#include <common.h>
   8#include <command.h>
   9#include <rtc.h>
  10#include <asm/io.h>
  11#include <asm/davinci_rtc.h>
  12
  13#if defined(CONFIG_CMD_DATE)
  14int rtc_get(struct rtc_time *tmp)
  15{
  16        struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
  17        unsigned long sec, min, hour, mday, wday, mon_cent, year;
  18        unsigned long status;
  19
  20        status = readl(&rtc->status);
  21        if ((status & RTC_STATE_RUN) != RTC_STATE_RUN) {
  22                printf("RTC doesn't run\n");
  23                return -1;
  24        }
  25        if ((status & RTC_STATE_BUSY) == RTC_STATE_BUSY)
  26                udelay(20);
  27
  28        sec     = readl(&rtc->second);
  29        min     = readl(&rtc->minutes);
  30        hour    = readl(&rtc->hours);
  31        mday    = readl(&rtc->day);
  32        wday    = readl(&rtc->dotw);
  33        mon_cent = readl(&rtc->month);
  34        year    = readl(&rtc->year);
  35
  36        debug("Get RTC year: %02lx mon/cent: %02lx mday: %02lx wday: %02lx "
  37                "hr: %02lx min: %02lx sec: %02lx\n",
  38                year, mon_cent, mday, wday,
  39                hour, min, sec);
  40
  41        tmp->tm_sec  = bcd2bin(sec  & 0x7F);
  42        tmp->tm_min  = bcd2bin(min  & 0x7F);
  43        tmp->tm_hour = bcd2bin(hour & 0x3F);
  44        tmp->tm_mday = bcd2bin(mday & 0x3F);
  45        tmp->tm_mon  = bcd2bin(mon_cent & 0x1F);
  46        tmp->tm_year = bcd2bin(year) + 2000;
  47        tmp->tm_wday = bcd2bin(wday & 0x07);
  48        tmp->tm_yday = 0;
  49        tmp->tm_isdst = 0;
  50
  51        debug("Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
  52                tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
  53                tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
  54
  55        return 0;
  56}
  57
  58int rtc_set(struct rtc_time *tmp)
  59{
  60        struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
  61
  62        debug("Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
  63                tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
  64                tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
  65        writel(bin2bcd(tmp->tm_year % 100), &rtc->year);
  66        writel(bin2bcd(tmp->tm_mon), &rtc->month);
  67
  68        writel(bin2bcd(tmp->tm_wday), &rtc->dotw);
  69        writel(bin2bcd(tmp->tm_mday), &rtc->day);
  70        writel(bin2bcd(tmp->tm_hour), &rtc->hours);
  71        writel(bin2bcd(tmp->tm_min), &rtc->minutes);
  72        writel(bin2bcd(tmp->tm_sec), &rtc->second);
  73        return 0;
  74}
  75
  76void rtc_reset(void)
  77{
  78        struct davinci_rtc *rtc = (struct davinci_rtc *)DAVINCI_RTC_BASE;
  79
  80        /* run RTC counter */
  81        writel(0x01, &rtc->ctrl);
  82}
  83#endif
  84