]>
Commit | Line | Data |
---|---|---|
535cfa4f GH |
1 | /* |
2 | * (C) Copyright 2008 | |
3 | * Gururaja Hebbar gururajakr@sanyo.co.in | |
4 | * | |
5 | * reference linux-2.6.20.6/drivers/rtc/rtc-pl031.c | |
6 | * | |
7 | * See file CREDITS for list of people who contributed to this | |
8 | * project. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License as | |
12 | * published by the Free Software Foundation; either version 2 of | |
13 | * the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
23 | * MA 02111-1307 USA | |
24 | */ | |
25 | ||
26 | #include <common.h> | |
27 | #include <command.h> | |
28 | #include <rtc.h> | |
29 | ||
30 | #if defined(CONFIG_CMD_DATE) | |
31 | ||
32 | #ifndef CFG_RTC_PL031_BASE | |
33 | #error CFG_RTC_PL031_BASE is not defined! | |
34 | #endif | |
35 | ||
36 | /* | |
37 | * Register definitions | |
38 | */ | |
39 | #define RTC_DR 0x00 /* Data read register */ | |
40 | #define RTC_MR 0x04 /* Match register */ | |
41 | #define RTC_LR 0x08 /* Data load register */ | |
42 | #define RTC_CR 0x0c /* Control register */ | |
43 | #define RTC_IMSC 0x10 /* Interrupt mask and set register */ | |
44 | #define RTC_RIS 0x14 /* Raw interrupt status register */ | |
45 | #define RTC_MIS 0x18 /* Masked interrupt status register */ | |
46 | #define RTC_ICR 0x1c /* Interrupt clear register */ | |
47 | ||
48 | #define RTC_CR_START (1 << 0) | |
49 | ||
50 | #define RTC_WRITE_REG(addr, val) \ | |
51 | (*(volatile unsigned int *)(CFG_RTC_PL031_BASE + (addr)) = (val)) | |
52 | #define RTC_READ_REG(addr) \ | |
53 | (*(volatile unsigned int *)(CFG_RTC_PL031_BASE + (addr))) | |
54 | ||
55 | static int pl031_initted = 0; | |
56 | ||
57 | /* Enable RTC Start in Control register*/ | |
58 | void rtc_init(void) | |
59 | { | |
60 | RTC_WRITE_REG(RTC_CR, RTC_CR_START); | |
61 | ||
62 | pl031_initted = 1; | |
63 | } | |
64 | ||
65 | /* | |
66 | * Reset the RTC. We set the date back to 1970-01-01. | |
67 | */ | |
68 | void rtc_reset(void) | |
69 | { | |
70 | RTC_WRITE_REG(RTC_LR, 0x00); | |
71 | if(!pl031_initted) | |
72 | rtc_init(); | |
73 | } | |
74 | ||
75 | /* | |
76 | * Set the RTC | |
77 | */ | |
d1e23194 | 78 | int rtc_set(struct rtc_time *tmp) |
535cfa4f GH |
79 | { |
80 | unsigned long tim; | |
81 | ||
82 | if(!pl031_initted) | |
83 | rtc_init(); | |
84 | ||
85 | if (tmp == NULL) { | |
86 | puts("Error setting the date/time\n"); | |
d1e23194 | 87 | return -1; |
535cfa4f GH |
88 | } |
89 | ||
90 | /* Calculate number of seconds this incoming time represents */ | |
91 | tim = mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday, | |
92 | tmp->tm_hour, tmp->tm_min, tmp->tm_sec); | |
93 | ||
94 | RTC_WRITE_REG(RTC_LR, tim); | |
d1e23194 JCPV |
95 | |
96 | return -1; | |
535cfa4f GH |
97 | } |
98 | ||
99 | /* | |
100 | * Get the current time from the RTC | |
101 | */ | |
102 | int rtc_get(struct rtc_time *tmp) | |
103 | { | |
104 | ulong tim; | |
105 | ||
106 | if(!pl031_initted) | |
107 | rtc_init(); | |
108 | ||
109 | if (tmp == NULL) { | |
110 | puts("Error getting the date/time\n"); | |
111 | return -1; | |
112 | } | |
113 | ||
114 | tim = RTC_READ_REG(RTC_DR); | |
115 | ||
116 | to_tm (tim, tmp); | |
117 | ||
118 | debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", | |
119 | tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, | |
120 | tmp->tm_hour, tmp->tm_min, tmp->tm_sec); | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | #endif |