drivers/char/watchdog/omap_wdt.h

   1 /*
   2  *  linux/drivers/char/watchdog/omap_wdt.h
   3  *
   4  *  BRIEF MODULE DESCRIPTION
   5  *      OMAP Watchdog timer register definitions
   6  *
   7  *  Copyright (C) 2004 Texas Instruments.
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  15  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  16  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  17  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  18  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  20  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  21  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  22  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  *  You should have received a copy of the  GNU General Public License along
  26  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  27  *  675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29
  30 #ifndef _OMAP_WATCHDOG_H
  31 #define _OMAP_WATCHDOG_H
  32
  33 #define OMAP1610_WATCHDOG_BASE          0xfffeb000
  34 #define OMAP2420_WATCHDOG_BASE          0x48022000      /*WDT Timer 2 */
  35
  36 #ifdef CONFIG_ARCH_OMAP24XX
  37 #define OMAP_WATCHDOG_BASE              OMAP2420_WATCHDOG_BASE
  38 #else
  39 #define OMAP_WATCHDOG_BASE              OMAP1610_WATCHDOG_BASE
  40 #define RM_RSTST_WKUP                   0
  41 #endif
  42
  43 #define OMAP_WATCHDOG_REV               (OMAP_WATCHDOG_BASE + 0x00)
  44 #define OMAP_WATCHDOG_SYS_CONFIG        (OMAP_WATCHDOG_BASE + 0x10)
  45 #define OMAP_WATCHDOG_STATUS            (OMAP_WATCHDOG_BASE + 0x14)
  46 #define OMAP_WATCHDOG_CNTRL             (OMAP_WATCHDOG_BASE + 0x24)
  47 #define OMAP_WATCHDOG_CRR               (OMAP_WATCHDOG_BASE + 0x28)
  48 #define OMAP_WATCHDOG_LDR               (OMAP_WATCHDOG_BASE + 0x2c)
  49 #define OMAP_WATCHDOG_TGR               (OMAP_WATCHDOG_BASE + 0x30)
  50 #define OMAP_WATCHDOG_WPS               (OMAP_WATCHDOG_BASE + 0x34)
  51 #define OMAP_WATCHDOG_SPR               (OMAP_WATCHDOG_BASE + 0x48)
  52
  53 /* Using the prescaler, the OMAP watchdog could go for many
  54  * months before firing.  These limits work without scaling,
  55  * with the 60 second default assumed by most tools and docs.
  56  */
  57 #define TIMER_MARGIN_MAX        (24 * 60 * 60)  /* 1 day */
  58 #define TIMER_MARGIN_DEFAULT    60      /* 60 secs */
  59 #define TIMER_MARGIN_MIN        1
  60
  61 #define PTV                     0       /* prescale */
  62 #define GET_WLDR_VAL(secs)      (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
  63
  64 #endif                          /* _OMAP_WATCHDOG_H */