davinci.c 2.2 KB

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