root/sys/arm/ti/ti_wdt.h
/*-
 * Copyright (c) 2014 Rui Paulo <rpaulo@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */
#ifndef _TI_WDT_H_
#define _TI_WDT_H_

/* TI WDT registers */
#define TI_WDT_WIDR             0x00    /* Watchdog Identification Register */
#define TI_WDT_WDSC             0x10    /* Watchdog System Control Register */
#define TI_WDT_WDST             0x14    /* Watchdog Status Register */
#define TI_WDT_WISR             0x18    /* Watchdog Interrupt Status Register */
#define TI_WDT_WIER             0x1c    /* Watchdog Interrupt Enable Register */
#define TI_WDT_WCLR             0x24    /* Watchdog Control Register */
#define TI_WDT_WCRR             0x28    /* Watchdog Counter Register */
#define TI_WDT_WLDR             0x2c    /* Watchdog Load Register */
#define TI_WDT_WTGR             0x30    /* Watchdog Trigger Register */
#define TI_WDT_WWPS             0x34    /* Watchdog Write Posting Register */
#define TI_WDT_WDLY             0x44    /* Watchdog Delay Configuration Reg */
#define TI_WDT_WSPR             0x48    /* Watchdog Start/Stop Register */
#define TI_WDT_WIRQSTATRAW      0x54    /* Watchdog Raw Interrupt Status Reg. */
#define TI_WDT_WIRQSTAT         0x58    /* Watchdog Int. Status Register */
#define TI_WDT_WIRQENSET        0x5c    /* Watchdog Int. Enable Set Register */
#define TI_WDT_WIRQENCLR        0x60    /* Watchdog Int. Enable Clear Reg. */

/* WDT_WDSC Register */
#define TI_WDSC_SR              (1 << 1) /* Soft reset */

/*
 * WDT_WWPS Register
 *
 * Writes to some registers require synchronisation with a different clock
 * domain.  The WDT_WWPS register is the place where this synchronisation
 * happens.
 */
#define TI_W_PEND_WCLR          (1 << 0)
#define TI_W_PEND_WCRR          (1 << 1)
#define TI_W_PEND_WLDR          (1 << 2)
#define TI_W_PEND_WTGR          (1 << 3)
#define TI_W_PEND_WSPR          (1 << 4)
#define TI_W_PEND_WDLY          (1 << 5)

/* WDT_WIRQENSET Register */
#define TI_IRQ_EN_OVF           (1 << 0)        /* Overflow interrupt */
#define TI_IRQ_EN_DLY           (1 << 1)        /* Delay interrupt */

/* WDT_WIRQSTAT Register */
#define TI_IRQ_EV_OVF           (1 << 0)        /* Overflow event */
#define TI_IRQ_EV_DLY           (1 << 1)        /* Delay event */

#endif /* _TI_WDT_H_ */