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Komal Shah7768a132006-09-29 01:59:18 -07001/*
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 */