kernel-ark/include/asm-m68knommu/mcfpit.h
Greg Ungerer c9b68714b6 [PATCH] m68knommu: add 5208 ColdFire pit timer support
Add support for the PIT timer used in the 5208 ColdFire fmaily.
Patch originally from Matt Wadell (from code originally modified by
Mike Lavender).

Signed-off-by: Greg Ungerer <gerg@uclinux.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-01 21:41:20 -08:00

68 lines
2.7 KiB
C

/****************************************************************************/
/*
* mcfpit.h -- ColdFire internal PIT timer support defines.
*
* (C) Copyright 2003, Greg Ungerer (gerg@snapgear.com)
*/
/****************************************************************************/
#ifndef mcfpit_h
#define mcfpit_h
/****************************************************************************/
#include <linux/config.h>
/*
* Get address specific defines for the 5270/5271, 5280/5282, and 5208.
*/
#if defined(CONFIG_M520x)
#define MCFPIT_BASE1 0x00080000 /* Base address of TIMER1 */
#define MCFPIT_BASE2 0x00084000 /* Base address of TIMER2 */
#else
#define MCFPIT_BASE1 0x00150000 /* Base address of TIMER1 */
#define MCFPIT_BASE2 0x00160000 /* Base address of TIMER2 */
#define MCFPIT_BASE3 0x00170000 /* Base address of TIMER3 */
#define MCFPIT_BASE4 0x00180000 /* Base address of TIMER4 */
#endif
/*
* Define the PIT timer register set addresses.
*/
struct mcfpit {
unsigned short pcsr; /* PIT control and status */
unsigned short pmr; /* PIT modulus register */
unsigned short pcntr; /* PIT count register */
} __attribute__((packed));
/*
* Bit definitions for the PIT Control and Status register.
*/
#define MCFPIT_PCSR_CLK1 0x0000 /* System clock divisor */
#define MCFPIT_PCSR_CLK2 0x0100 /* System clock divisor */
#define MCFPIT_PCSR_CLK4 0x0200 /* System clock divisor */
#define MCFPIT_PCSR_CLK8 0x0300 /* System clock divisor */
#define MCFPIT_PCSR_CLK16 0x0400 /* System clock divisor */
#define MCFPIT_PCSR_CLK32 0x0500 /* System clock divisor */
#define MCFPIT_PCSR_CLK64 0x0600 /* System clock divisor */
#define MCFPIT_PCSR_CLK128 0x0700 /* System clock divisor */
#define MCFPIT_PCSR_CLK256 0x0800 /* System clock divisor */
#define MCFPIT_PCSR_CLK512 0x0900 /* System clock divisor */
#define MCFPIT_PCSR_CLK1024 0x0a00 /* System clock divisor */
#define MCFPIT_PCSR_CLK2048 0x0b00 /* System clock divisor */
#define MCFPIT_PCSR_CLK4096 0x0c00 /* System clock divisor */
#define MCFPIT_PCSR_CLK8192 0x0d00 /* System clock divisor */
#define MCFPIT_PCSR_CLK16384 0x0e00 /* System clock divisor */
#define MCFPIT_PCSR_CLK32768 0x0f00 /* System clock divisor */
#define MCFPIT_PCSR_DOZE 0x0040 /* Clock run in doze mode */
#define MCFPIT_PCSR_HALTED 0x0020 /* Clock run in halt mode */
#define MCFPIT_PCSR_OVW 0x0010 /* Overwrite PIT counter now */
#define MCFPIT_PCSR_PIE 0x0008 /* Enable PIT interrupt */
#define MCFPIT_PCSR_PIF 0x0004 /* PIT interrupt flag */
#define MCFPIT_PCSR_RLD 0x0002 /* Reload counter */
#define MCFPIT_PCSR_EN 0x0001 /* Enable PIT */
#define MCFPIT_PCSR_DISABLE 0x0000 /* Disable PIT */
/****************************************************************************/
#endif /* mcfpit_h */