FreeBSD/Linux Kernel Cross Reference
sys/arm/freescale/imx/imx_wdogreg.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2012, 2013 The FreeBSD Foundation
      *
      * This software was developed by Oleksandr Rybalko under sponsorship
      * from the FreeBSD Foundation.
      *
      * 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 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    
    #define WDOG_CLK_FREQ   32768
    
    #define WDOG_CR_REG     0x00    /* Control Register */
    #define   WDOG_CR_WT_MASK         0xff00    /* Count; 0.5 sec units */
    #define   WDOG_CR_WT_SHIFT        8
    #define   WDOG_CR_WDW             (1u << 7) /* Suspend when in WAIT mode */
    #define   WDOG_CR_WDA             (1u << 5) /* Don't assert ext reset */
    #define   WDOG_CR_SRS             (1u << 4) /* Don't assert soft reset */
    #define   WDOG_CR_WDT             (1u << 3) /* Assert ext reset on timeout */
    #define   WDOG_CR_WDE             (1u << 2) /* Watchdog Enable */
    #define   WDOG_CR_WDBG            (1u << 1) /* Suspend when DBG mode */
    #define   WDOG_CR_WDZST           (1u << 0) /* Suspend when LP mode */
    
    #define WDOG_SR_REG     0x02    /* Service Register */
    #define   WDOG_SR_STEP1           0x5555
    #define   WDOG_SR_STEP2           0xaaaa
    
    #define WDOG_RSR_REG    0x04    /* Reset Status Register */
    #define   WDOG_RSR_POR            (1u << 4) /* Due to Power-On Reset */
    #define   WDOG_RSR_TOUT           (1u << 1) /* Due WDog timeout reset */
    #define   WDOG_RSR_SFTW           (1u << 0) /* Due Soft reset */
    
    #define WDOG_ICR_REG    0x06    /* Interrupt Control Register */
    #define   WDOG_ICR_WIE            (1u << 15) /* Enable Interrupt */
    #define   WDOG_ICR_WTIS           (1u << 14) /* Interrupt has occurred */
    #define   WDOG_ICR_WTCT_MASK      0x00ff     /* Interrupt lead time in 0.5s */
    #define   WDOG_ICR_WTCT_SHIFT     0          /* units before reset occurs */
    
    #define WDOG_MCR_REG    0x08    /* Miscellaneous Control Register */
    #define   WDOG_MCR_PDE            (1u << 0)  /* Power-down enable */

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