643c0a1e0e
The old timrot setup API was very low-level and unfriendly. The new one makes in easier to select the frequency source. Use to simplify timer and kernel timer code. Change-Id: Iffcdf11c00e925be9ec8d9a4efc74b197b6bd2aa
80 lines
2.5 KiB
C
80 lines
2.5 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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#ifndef TIMROT_IMX233_H
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#define TIMROT_IMX233_H
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#include "system.h"
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#include "cpu.h"
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#include "icoll-imx233.h"
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/* WARNING timrot code assumes APBX is running at 24MHz */
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/* list of timers */
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enum
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{
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TIMER_TICK, /* for tick task */
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TIMER_USER, /* for user timer */
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TIMER_WATCHDOG, /* for watchdog */
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};
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/* timer sources */
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enum imx233_timrot_src_t
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{
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TIMER_SRC_24MHZ,
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TIMER_SRC_12MHZ,
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TIMER_SRC_6MHZ,
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TIMER_SRC_3MHZ,
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TIMER_SRC_32KHZ,
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TIMER_SRC_8KHZ,
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TIMER_SRC_4KHZ,
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TIMER_SRC_1KHZ,
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TIMER_SRC_STOP
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};
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struct imx233_timrot_info_t
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{
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unsigned fixed_count, run_count;
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unsigned src;
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unsigned prescale;
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bool reload;
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bool polarity;
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bool irqen;
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};
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typedef void (*imx233_timer_fn_t)(void);
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/* maximum count for non-periodic timers, add one for periodic timers */
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#define IMX233_TIMROT_MAX_COUNT 0xffff
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void imx233_timrot_init(void);
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/* low-level function all-in-one function */
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void imx233_timrot_setup(unsigned timer_nr, bool reload, unsigned count,
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unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn);
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/* change interrupt priority */
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void imx233_timrot_set_priority(unsigned timer_nr, unsigned prio);
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/* simple setup function */
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void imx233_timrot_setup_simple(unsigned timer_nr, bool periodic, unsigned count,
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enum imx233_timrot_src_t src, imx233_timer_fn_t fn);
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/* get timer count */
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unsigned imx233_timrot_get_count(unsigned timer_nr);
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/* update timer running count */
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struct imx233_timrot_info_t imx233_timrot_get_info(unsigned timer_nr);
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#endif /* TIMROT_IMX233_H */
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