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omap_wdt.h
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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 OMAP_WATCHDOG_REV (0x00)
34 #define OMAP_WATCHDOG_SYS_CONFIG (0x10)
35 #define OMAP_WATCHDOG_STATUS (0x14)
36 #define OMAP_WATCHDOG_CNTRL (0x24)
37 #define OMAP_WATCHDOG_CRR (0x28)
38 #define OMAP_WATCHDOG_LDR (0x2c)
39 #define OMAP_WATCHDOG_TGR (0x30)
40 #define OMAP_WATCHDOG_WPS (0x34)
41 #define OMAP_WATCHDOG_SPR (0x48)
42 
43 /* Using the prescaler, the OMAP watchdog could go for many
44  * months before firing. These limits work without scaling,
45  * with the 60 second default assumed by most tools and docs.
46  */
47 #define TIMER_MARGIN_MAX (24 * 60 * 60) /* 1 day */
48 #define TIMER_MARGIN_DEFAULT 60 /* 60 secs */
49 #define TIMER_MARGIN_MIN 1
50 
51 #define PTV 0 /* prescale */
52 #define GET_WLDR_VAL(secs) (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
53 
54 #endif /* _OMAP_WATCHDOG_H */