eac1ca22bd
NOTE: this commit does not introduce any change, ideally even the binary should
be almost the same. I checked the disassembly by hand and there are only a few
differences here and there, mostly the compiler decides to compile very close
expressions slightly differently. I tried to run the new code on several targets
to make sure and saw no difference.
The major syntax changes of the new headers are as follows:
- BF_{WR,SET,CLR} are now superpowerful and allows to set several fileds at once:
BF_WR(reg, field1(value1), field2(value2), ...)
- BF_CS (use like BF_WR) does a write to reg_CLR and then reg_SET instead of RMW
- there is no more need for macros like BF_{WR_,SET,CLR}_V, since one can simply
BF_WR with field_V(name)
- the old BF_SETV macro has no trivial equivalent and is replaced with its
its equivalent for BF_WR(reg_SET, ...)
I also rename the register headers: "regs/regs-x.h" -> "regs/x.h" to avoid the
redundant "regs".
Final note: the registers were generated using the following command:
./headergen_v2 -g imx -o ../../firmware/target/arm/imx233/regs/ desc/regs-stmp3{600,700,780}.xml
Change-Id: I7485e8b4315a0929a8edb63e7fa1edcaa54b1edc
140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "time.h"
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#include "system.h"
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#include "rtc.h"
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#include "timefuncs.h"
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#include "rtc-imx233.h"
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#define YEAR1980 315532800 /* 1980/1/1 00:00:00 in UTC */
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#if defined(SANSA_FUZEPLUS) || defined(CREATIVE_ZENXFI3) || defined(SONY_NWZE360) || \
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defined(SONY_NWZE370)
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#define USE_PERSISTENT
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#endif
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void rtc_init(void)
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{
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/* rtc-imx233 is initialized by the system */
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}
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static void seconds_to_datetime(uint32_t seconds, struct tm *tm)
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{
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#ifdef USE_PERSISTENT
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/* The OF uses PERSISTENT2 register to keep the adjustment and only changes
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* SECONDS if necessary. */
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seconds += imx233_rtc_read_persistent(2);
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#else
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/* The Freescale recommended way of keeping time is the number of seconds
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* since 00:00 1/1/1980 */
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seconds += YEAR1980;
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#endif
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gmtime_r(&seconds, tm);
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}
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int rtc_read_datetime(struct tm *tm)
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{
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seconds_to_datetime(imx233_rtc_read_seconds(), tm);
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return 0;
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}
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int rtc_write_datetime(const struct tm *tm)
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{
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uint32_t seconds;
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seconds = mktime((struct tm *)tm);
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#ifdef USE_PERSISTENT
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/* The OF uses PERSISTENT2 register to keep the adjustment and only changes
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* SECONDS if necessary.
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* NOTE: the OF uses this mechanism to prevent roll back in time. Although
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* Rockbox will handle a negative PERSISTENT2 value, the OF will detect
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* it and won't return in time before SECONDS */
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imx233_rtc_write_persistent(2, seconds - imx233_rtc_read_seconds());
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#else
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/* The Freescale recommended way of keeping time is the number of seconds
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* since 00:00 1/1/1980 */
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imx233_rtc_write_seconds(seconds - YEAR1980);
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#endif
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return 0;
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}
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void rtc_set_alarm(int h, int m)
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{
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/* transform alarm time to absolute time */
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struct tm tm;
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seconds_to_datetime(imx233_rtc_read_seconds(), &tm);
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/* if same date and hour/min is in the past, advance one day */
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if(h < tm.tm_hour || (h == tm.tm_hour && m <= tm.tm_min))
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seconds_to_datetime(imx233_rtc_read_seconds() + 3600 * 60, &tm);
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tm.tm_hour = h;
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tm.tm_min = m;
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tm.tm_sec = 0;
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uint32_t seconds = mktime(&tm);
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#ifdef USE_PERSISTENT
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imx233_rtc_write_alarm(seconds - imx233_rtc_read_persistent(2));
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#else
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imx233_rtc_write_alarm(seconds - YEAR1980);
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#endif
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}
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void rtc_get_alarm(int *h, int *m)
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{
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struct tm tm;
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seconds_to_datetime(imx233_rtc_read_alarm(), &tm);
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*m = tm.tm_min;
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*h = tm.tm_hour;
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}
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void rtc_enable_alarm(bool enable)
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{
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BF_CLR(RTC_CTRL, ALARM_IRQ_EN);
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BF_CLR(RTC_CTRL, ALARM_IRQ);
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uint32_t val = imx233_rtc_read_persistent(0);
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BF_WRX(val, RTC_PERSISTENT0, ALARM_EN(enable));
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BF_WRX(val, RTC_PERSISTENT0, ALARM_WAKE_EN(enable));
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BF_WRX(val, RTC_PERSISTENT0, ALARM_WAKE(0));
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imx233_rtc_write_persistent(0, val);
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}
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/**
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* Check if alarm caused unit to start.
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*/
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bool rtc_check_alarm_started(bool release_alarm)
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{
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bool res = BF_RDX(imx233_rtc_read_persistent(0), RTC_PERSISTENT0, ALARM_WAKE);
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if(release_alarm)
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rtc_enable_alarm(false);
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return res;
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}
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/**
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* Checks if an alarm interrupt has triggered since last we checked.
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*/
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bool rtc_check_alarm_flag(void)
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{
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return BF_RD(RTC_CTRL, ALARM_IRQ);
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}
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