Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 2 | /* |
| 3 | * Faraday FTRTC010 Real Time Clock |
| 4 | * |
| 5 | * (C) Copyright 2009 Faraday Technology |
| 6 | * Po-Yu Chuang <ratbert@faraday-tech.com> |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <config.h> |
| 10 | #include <common.h> |
Simon Glass | 0f2af88 | 2020-05-10 11:40:05 -0600 | [diff] [blame] | 11 | #include <log.h> |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 12 | #include <rtc.h> |
| 13 | #include <asm/io.h> |
| 14 | |
| 15 | struct ftrtc010 { |
| 16 | unsigned int sec; /* 0x00 */ |
| 17 | unsigned int min; /* 0x04 */ |
| 18 | unsigned int hour; /* 0x08 */ |
| 19 | unsigned int day; /* 0x0c */ |
| 20 | unsigned int alarm_sec; /* 0x10 */ |
| 21 | unsigned int alarm_min; /* 0x14 */ |
| 22 | unsigned int alarm_hour; /* 0x18 */ |
| 23 | unsigned int record; /* 0x1c */ |
| 24 | unsigned int cr; /* 0x20 */ |
Macpaul Lin | f90f133 | 2010-10-19 20:14:36 +0800 | [diff] [blame] | 25 | unsigned int wsec; /* 0x24 */ |
| 26 | unsigned int wmin; /* 0x28 */ |
| 27 | unsigned int whour; /* 0x2c */ |
| 28 | unsigned int wday; /* 0x30 */ |
| 29 | unsigned int intr; /* 0x34 */ |
| 30 | unsigned int div; /* 0x38 */ |
| 31 | unsigned int rev; /* 0x3c */ |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 32 | }; |
| 33 | |
| 34 | /* |
| 35 | * RTC Control Register |
| 36 | */ |
| 37 | #define FTRTC010_CR_ENABLE (1 << 0) |
| 38 | #define FTRTC010_CR_INTERRUPT_SEC (1 << 1) /* per second irq */ |
| 39 | #define FTRTC010_CR_INTERRUPT_MIN (1 << 2) /* per minute irq */ |
| 40 | #define FTRTC010_CR_INTERRUPT_HR (1 << 3) /* per hour irq */ |
| 41 | #define FTRTC010_CR_INTERRUPT_DAY (1 << 4) /* per day irq */ |
| 42 | |
| 43 | static struct ftrtc010 *rtc = (struct ftrtc010 *)CONFIG_FTRTC010_BASE; |
| 44 | |
| 45 | static void ftrtc010_enable(void) |
| 46 | { |
| 47 | writel(FTRTC010_CR_ENABLE, &rtc->cr); |
| 48 | } |
| 49 | |
| 50 | /* |
| 51 | * return current time in seconds |
| 52 | */ |
| 53 | static unsigned long ftrtc010_time(void) |
| 54 | { |
| 55 | unsigned long day; |
| 56 | unsigned long hour; |
| 57 | unsigned long minute; |
| 58 | unsigned long second; |
| 59 | unsigned long second2; |
| 60 | |
| 61 | do { |
| 62 | second = readl(&rtc->sec); |
| 63 | day = readl(&rtc->day); |
| 64 | hour = readl(&rtc->hour); |
| 65 | minute = readl(&rtc->min); |
| 66 | second2 = readl(&rtc->sec); |
| 67 | } while (second != second2); |
| 68 | |
| 69 | return day * 24 * 60 * 60 + hour * 60 * 60 + minute * 60 + second; |
| 70 | } |
| 71 | |
| 72 | /* |
| 73 | * Get the current time from the RTC |
| 74 | */ |
| 75 | |
| 76 | int rtc_get(struct rtc_time *tmp) |
| 77 | { |
| 78 | unsigned long now; |
| 79 | |
| 80 | debug("%s(): record register: %x\n", |
| 81 | __func__, readl(&rtc->record)); |
| 82 | |
Tom Rini | fb8a629 | 2022-12-04 10:04:06 -0500 | [diff] [blame] | 83 | #ifdef CFG_FTRTC010_PCLK |
Macpaul Lin | f90f133 | 2010-10-19 20:14:36 +0800 | [diff] [blame] | 84 | now = (ftrtc010_time() + readl(&rtc->record)) / RTC_DIV_COUNT; |
Tom Rini | 84e6dfa | 2022-12-04 10:04:05 -0500 | [diff] [blame] | 85 | #else /* CFG_FTRTC010_EXTCLK */ |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 86 | now = ftrtc010_time() + readl(&rtc->record); |
Macpaul Lin | f90f133 | 2010-10-19 20:14:36 +0800 | [diff] [blame] | 87 | #endif |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 88 | |
Simon Glass | 1299466 | 2015-04-20 12:37:18 -0600 | [diff] [blame] | 89 | rtc_to_tm(now, tmp); |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * Set the RTC |
| 96 | */ |
| 97 | int rtc_set(struct rtc_time *tmp) |
| 98 | { |
| 99 | unsigned long new; |
| 100 | unsigned long now; |
| 101 | |
| 102 | debug("%s(): DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", |
| 103 | __func__, |
| 104 | tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, |
| 105 | tmp->tm_hour, tmp->tm_min, tmp->tm_sec); |
| 106 | |
Simon Glass | 4283e84 | 2015-04-20 12:37:19 -0600 | [diff] [blame] | 107 | new = rtc_mktime(tmp); |
Po-Yu Chuang | e014254 | 2009-11-11 17:26:00 +0800 | [diff] [blame] | 108 | |
| 109 | now = ftrtc010_time(); |
| 110 | |
| 111 | debug("%s(): write %lx to record register\n", __func__, new - now); |
| 112 | |
| 113 | writel(new - now, &rtc->record); |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | void rtc_reset(void) |
| 119 | { |
| 120 | debug("%s()\n", __func__); |
| 121 | ftrtc010_enable(); |
| 122 | } |