| trem | 78befb6 | 2012-08-08 07:04:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Freescale i.MX27 RTC Driver |
| 3 | * |
| 4 | * Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <common.h> |
| 23 | #include <rtc.h> |
| 24 | #include <asm/io.h> |
| 25 | #include <asm/arch/imx-regs.h> |
| 26 | |
| 27 | #define HOUR_SHIFT 8 |
| 28 | #define HOUR_MASK 0x1f |
| 29 | #define MIN_SHIFT 0 |
| 30 | #define MIN_MASK 0x3f |
| 31 | |
| 32 | int rtc_get(struct rtc_time *time) |
| 33 | { |
| 34 | struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; |
| 35 | uint32_t day, hour, min, sec; |
| 36 | |
| 37 | day = readl(&rtc_regs->dayr); |
| 38 | hour = readl(&rtc_regs->hourmin); |
| 39 | sec = readl(&rtc_regs->seconds); |
| 40 | |
| 41 | min = (hour >> MIN_SHIFT) & MIN_MASK; |
| 42 | hour = (hour >> HOUR_SHIFT) & HOUR_MASK; |
| 43 | |
| 44 | sec += min * 60 + hour * 3600 + day * 24 * 3600; |
| 45 | |
| 46 | to_tm(sec, time); |
| 47 | |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | int rtc_set(struct rtc_time *time) |
| 52 | { |
| 53 | struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; |
| 54 | uint32_t day, hour, min, sec; |
| 55 | |
| 56 | sec = mktime(time->tm_year, time->tm_mon, time->tm_mday, |
| 57 | time->tm_hour, time->tm_min, time->tm_sec); |
| 58 | |
| 59 | day = sec / (24 * 3600); |
| 60 | sec = sec % (24 * 3600); |
| 61 | hour = sec / 3600; |
| 62 | sec = sec % 3600; |
| 63 | min = sec / 60; |
| 64 | sec = sec % 60; |
| 65 | |
| 66 | hour = (hour & HOUR_MASK) << HOUR_SHIFT; |
| 67 | hour |= (min & MIN_MASK) << MIN_SHIFT; |
| 68 | |
| 69 | writel(day, &rtc_regs->dayr); |
| 70 | writel(hour, &rtc_regs->hourmin); |
| 71 | writel(sec, &rtc_regs->seconds); |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | void rtc_reset(void) |
| 77 | { |
| 78 | struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE; |
| 79 | |
| 80 | writel(0, &rtc_regs->dayr); |
| 81 | writel(0, &rtc_regs->hourmin); |
| 82 | writel(0, &rtc_regs->seconds); |
| 83 | } |