projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| b608b957 JC |
1 | /* |
| 2 | * Copyright (C) 2011 | |
| 3 | * Jason Cooper <u-boot@lakedaemon.net> | |
| 4 | * | |
| 1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
| b608b957 JC |
6 | */ |
| 7 | ||
| 8 | /* | |
| 9 | * Date & Time support for Marvell Integrated RTC | |
| 10 | */ | |
| 11 | ||
| 12 | #include <common.h> | |
| 13 | #include <command.h> | |
| 14 | #include <rtc.h> | |
| 0ac16bf3 | 15 | #include <asm/io.h> |
| b608b957 JC |
16 | #include "mvrtc.h" |
| 17 | ||
| 18 | /* This RTC does not support century, so we assume 20 */ | |
| 19 | #define CENTURY 20 | |
| 20 | ||
| 21 | int rtc_get(struct rtc_time *t) | |
| 22 | { | |
| 23 | u32 time; | |
| 24 | u32 date; | |
| 25 | struct mvrtc_registers *mvrtc_regs; | |
| 26 | ||
| 27 | mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE; | |
| 28 | ||
| 29 | /* read the time register */ | |
| 30 | time = readl(&mvrtc_regs->time); | |
| 31 | ||
| 32 | /* read the date register */ | |
| 33 | date = readl(&mvrtc_regs->date); | |
| 34 | ||
| 35 | /* test for 12 hour clock (can't tell if it's am/pm) */ | |
| 36 | if (time & MVRTC_HRFMT_MSK) { | |
| 37 | printf("Error: RTC in 12 hour mode, can't determine AM/PM.\n"); | |
| 38 | return -1; | |
| 39 | } | |
| 40 | ||
| 41 | /* time */ | |
| 42 | t->tm_sec = bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK); | |
| 43 | t->tm_min = bcd2bin((time >> MVRTC_MIN_SFT) & MVRTC_MIN_MSK); | |
| 44 | t->tm_hour = bcd2bin((time >> MVRTC_HOUR_SFT) & MVRTC_HOUR_MSK); | |
| 45 | t->tm_wday = bcd2bin((time >> MVRTC_DAY_SFT) & MVRTC_DAY_MSK); | |
| 46 | t->tm_wday--; | |
| 47 | ||
| 48 | /* date */ | |
| 49 | t->tm_mday = bcd2bin((date >> MVRTC_DATE_SFT) & MVRTC_DATE_MSK); | |
| 50 | t->tm_mon = bcd2bin((date >> MVRTC_MON_SFT) & MVRTC_MON_MSK); | |
| 51 | t->tm_year = bcd2bin((date >> MVRTC_YEAR_SFT) & MVRTC_YEAR_MSK); | |
| 52 | t->tm_year += CENTURY * 100; | |
| 53 | ||
| 54 | /* not supported in this RTC */ | |
| 55 | t->tm_yday = 0; | |
| 56 | t->tm_isdst = 0; | |
| 57 | ||
| 58 | return 0; | |
| 59 | } | |
| 60 | ||
| 61 | int rtc_set(struct rtc_time *t) | |
| 62 | { | |
| 63 | u32 time = 0; /* sets hour format bit to zero, 24hr format. */ | |
| 64 | u32 date = 0; | |
| 65 | struct mvrtc_registers *mvrtc_regs; | |
| 66 | ||
| 67 | mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE; | |
| 68 | ||
| 69 | /* check that this code isn't 80+ years old ;-) */ | |
| 70 | if ((t->tm_year / 100) != CENTURY) | |
| 71 | printf("Warning: Only century %d supported.\n", CENTURY); | |
| 72 | ||
| 73 | /* time */ | |
| 74 | time |= (bin2bcd(t->tm_sec) & MVRTC_SEC_MSK) << MVRTC_SEC_SFT; | |
| 75 | time |= (bin2bcd(t->tm_min) & MVRTC_MIN_MSK) << MVRTC_MIN_SFT; | |
| 76 | time |= (bin2bcd(t->tm_hour) & MVRTC_HOUR_MSK) << MVRTC_HOUR_SFT; | |
| 77 | time |= (bin2bcd(t->tm_wday + 1) & MVRTC_DAY_MSK) << MVRTC_DAY_SFT; | |
| 78 | ||
| 79 | /* date */ | |
| 80 | date |= (bin2bcd(t->tm_mday) & MVRTC_DATE_MSK) << MVRTC_DATE_SFT; | |
| 81 | date |= (bin2bcd(t->tm_mon) & MVRTC_MON_MSK) << MVRTC_MON_SFT; | |
| 82 | date |= (bin2bcd(t->tm_year % 100) & MVRTC_YEAR_MSK) << MVRTC_YEAR_SFT; | |
| 83 | ||
| 84 | /* write the time register */ | |
| 85 | writel(time, &mvrtc_regs->time); | |
| 86 | ||
| 87 | /* write the date register */ | |
| 88 | writel(date, &mvrtc_regs->date); | |
| 89 | ||
| 90 | return 0; | |
| 91 | } | |
| 92 | ||
| 93 | void rtc_reset(void) | |
| 94 | { | |
| 95 | u32 time; | |
| 96 | u32 sec; | |
| 97 | struct mvrtc_registers *mvrtc_regs; | |
| 98 | ||
| 99 | mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE; | |
| 100 | ||
| 101 | /* no init routine for this RTC needed, just check that it's working */ | |
| 102 | time = readl(&mvrtc_regs->time); | |
| 103 | sec = bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK); | |
| 104 | udelay(1000000); | |
| 105 | time = readl(&mvrtc_regs->time); | |
| 106 | ||
| 107 | if (sec == bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK)) | |
| 108 | printf("Error: RTC did not increment.\n"); | |
| 109 | } |