forked from Imagelibrary/rtems
0149e6e749
Updates the recently merged relicensed files with the 2-Clause BSD SPDX annotation. Closes #5208.
108 lines
3.9 KiB
C
108 lines
3.9 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* Instantiate the clock driver shell.
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*
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* This uses the TOY (Time of Year) timer to implement the clock.
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*/
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/*
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* Copyright (C) 2005 by Cogent Computer Systems
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* Written by Jay Monkman <jtm@lopingdog.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <rtems.h>
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#include <bsp.h>
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#include <bsp/irq.h>
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#include <rtems/bspIo.h>
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uint32_t tick_interval;
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uint32_t last_match;
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void au1x00_clock_init(void);
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#define CLOCK_VECTOR AU1X00_IRQ_TOY_MATCH2
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#define Clock_driver_support_at_tick(arg) \
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do { \
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while (AU1X00_SYS_CNTCTRL(AU1X00_SYS_ADDR) & AU1X00_SYS_CNTCTRL_TM0); \
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last_match = AU1X00_SYS_TOYREAD(AU1X00_SYS_ADDR); \
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AU1X00_SYS_TOYMATCH2(AU1X00_SYS_ADDR) = last_match + tick_interval; \
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au_sync(); \
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} while(0)
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/* Set for rising edge interrupt */
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#define Clock_driver_support_install_isr( _new ) \
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do { \
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rtems_interrupt_handler_install( \
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CLOCK_VECTOR, \
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"clock", \
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0, \
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_new, \
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NULL \
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); \
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AU1X00_IC_MASKCLR(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2; \
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AU1X00_IC_SRCSET(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2; \
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AU1X00_IC_CFG0SET(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2; \
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AU1X00_IC_CFG1CLR(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2; \
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AU1X00_IC_CFG2CLR(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2; \
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AU1X00_IC_ASSIGNSET(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2; \
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} while(0)
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void au1x00_clock_init(void)
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{
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uint32_t wakemask;
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/* Clear the trim register */
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AU1X00_SYS_TOYTRIM(AU1X00_SYS_ADDR) = 0;
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/* Clear the TOY counter */
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while (AU1X00_SYS_CNTCTRL(AU1X00_SYS_ADDR) & AU1X00_SYS_CNTCTRL_TS);
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AU1X00_SYS_TOYWRITE(AU1X00_SYS_ADDR) = 0;
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while (AU1X00_SYS_CNTCTRL(AU1X00_SYS_ADDR) & AU1X00_SYS_CNTCTRL_TS);
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wakemask = AU1X00_SYS_WAKEMSK(AU1X00_SYS_ADDR);
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wakemask |= AU1X00_SYS_WAKEMSK_M20;
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AU1X00_SYS_WAKEMSK(AU1X00_SYS_ADDR) = wakemask;
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AU1X00_IC_WAKESET(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2;
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tick_interval = 32768 * rtems_configuration_get_microseconds_per_tick();
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tick_interval = tick_interval / 1000000;
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last_match = AU1X00_SYS_TOYREAD(AU1X00_SYS_ADDR);
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AU1X00_SYS_TOYMATCH2(AU1X00_SYS_ADDR) = last_match + (50*tick_interval);
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AU1X00_IC_MASKSET(AU1X00_IC0_ADDR) = AU1X00_IC_IRQ_TOY_MATCH2;
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while (AU1X00_SYS_CNTCTRL(AU1X00_SYS_ADDR) & AU1X00_SYS_CNTCTRL_TM0);
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}
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#define Clock_driver_support_initialize_hardware() \
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do { \
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au1x00_clock_init(); \
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} while(0)
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#define CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER
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#include "../../../shared/dev/clock/clockimpl.h"
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