From 0662793ca0050e823cd1207cc4689a1cba5068bd Mon Sep 17 00:00:00 2001 From: Solomon Peachy Date: Thu, 28 Jun 2018 06:24:26 -0400 Subject: Add cleaned-up xDuoo X3 support Cleaned up, rebased, and forward-ported from the xvortex fork. (original credit to vsoftster@gmail.com) Change-Id: Ibcc023a0271ea81e901450a88317708c2683236d Signed-off-by: Solomon Peachy --- firmware/drivers/rtc/rtc_jz4760.c | 124 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100644 firmware/drivers/rtc/rtc_jz4760.c (limited to 'firmware/drivers/rtc/rtc_jz4760.c') diff --git a/firmware/drivers/rtc/rtc_jz4760.c b/firmware/drivers/rtc/rtc_jz4760.c new file mode 100644 index 0000000000..cda618d617 --- /dev/null +++ b/firmware/drivers/rtc/rtc_jz4760.c @@ -0,0 +1,124 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2016 by Roman Stolyarov + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* + * Real Time Clock interface for Jz4760. + * + */ + +#include "config.h" +#include "cpu.h" +#include "rtc.h" +#include "timefuncs.h" +#include "logf.h" + +#define RTC_FREQ_DIVIDER (32768 - 1) + +/* Stolen from dietlibc-0.29/libugly/gmtime_r.c (GPLv2) */ +#define SPD (24*60*60) +#define ISLEAP(year) (!(year%4) && ((year%100) || !(year%400))) +static void _localtime(const time_t t, struct tm *r) +{ + time_t i; + register time_t work = t % SPD; + static int m_to_d[12] = /* This could be shared with mktime() */ + {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334}; + + r->tm_sec = work % 60; + work /= 60; + r->tm_min = work % 60; + r->tm_hour = work / 60; + work = t / SPD; + r->tm_wday = (4 + work) % 7; + + for (i=1970; ; ++i) + { + register time_t k = ISLEAP(i) ? 366 : 365; + + if (work >= k) + work -= k; + else + break; + } + + r->tm_year = i - 1900; + r->tm_yday = work; + + r->tm_mday = 1; + if (ISLEAP(i) && (work>58)) + { + if (work==59) + r->tm_mday=2; /* 29.2. */ + + work-=1; + } + + for (i=11; i && (m_to_d[i] > work); --i); + r->tm_mon = i; + r->tm_mday += work - m_to_d[i]; +} + +int rtc_read_datetime(struct tm *tm) +{ + _localtime(rtc_read_reg(RTC_RTCSR), tm); + + return 1; +} + +int rtc_write_datetime(const struct tm *tm) +{ + rtc_write_reg(RTC_RTCSR, mktime((struct tm*)tm)); + + return 0; +} + +void rtc_init(void) +{ + unsigned int cfc,hspr,rgr_1hz; + + __cpm_select_rtcclk_rtc(); + + cfc = HSPR_RTCV; + hspr = rtc_read_reg(RTC_HSPR); + rgr_1hz = rtc_read_reg(RTC_RTCGR) & RTCGR_NC1HZ_MASK; + + if((hspr != cfc) || (rgr_1hz != RTC_FREQ_DIVIDER)) + { + /* We are powered on for the first time !!! */ + + /* Set 32768 rtc clocks per seconds */ + rtc_write_reg(RTC_RTCGR, RTC_FREQ_DIVIDER); + + /* Set minimum wakeup_n pin low-level assertion time for wakeup: 100ms */ + rtc_write_reg(RTC_HWFCR, HWFCR_WAIT_TIME(100)); + rtc_write_reg(RTC_HRCR, HRCR_WAIT_TIME(60)); + + /* Reset to the default time */ + rtc_write_reg(RTC_RTCSR, 946681200); /* 01/01/2000 */ + + /* start rtc */ + rtc_write_reg(RTC_RTCCR, RTCCR_RTCE); + rtc_write_reg(RTC_HSPR, cfc); + } + + /* clear all rtc flags */ + rtc_write_reg(RTC_HWRSR, 0); +} -- cgit v1.2.3