blob: 4886e01fda2c8a15a17115e5cd248912afc14043 [file] [log] [blame]
/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <mmio.h>
#include <sp805.h>
#include <stdint.h>
/* Inline register access functions */
static inline void sp805_write_wdog_load(uintptr_t base, unsigned long value)
{
mmio_write_32(base + SP805_WDOG_LOAD_OFF, value);
}
static inline void sp805_write_wdog_ctrl(uintptr_t base, unsigned long value)
{
mmio_write_32(base + SP805_WDOG_CTR_OFF, value);
}
static inline void sp805_write_wdog_lock(uintptr_t base, unsigned long value)
{
mmio_write_32(base + SP805_WDOG_LOCK_OFF, value);
}
/* Public API implementation */
void sp805_start(uintptr_t base, unsigned long ticks)
{
sp805_write_wdog_load(base, ticks);
sp805_write_wdog_ctrl(base, SP805_CTR_RESEN | SP805_CTR_INTEN);
/* Lock registers access */
sp805_write_wdog_lock(base, 0);
}
void sp805_stop(uintptr_t base)
{
sp805_write_wdog_lock(base, WDOG_UNLOCK_KEY);
sp805_write_wdog_ctrl(base, 0);
}
void sp805_refresh(uintptr_t base, unsigned long ticks)
{
sp805_write_wdog_lock(base, WDOG_UNLOCK_KEY);
sp805_write_wdog_load(base, ticks);
sp805_write_wdog_lock(base, 0);
}