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78befb69 | 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 | } |