c9b68714b6
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>
68 lines
2.7 KiB
C
68 lines
2.7 KiB
C
/****************************************************************************/
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/*
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* mcfpit.h -- ColdFire internal PIT timer support defines.
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*
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* (C) Copyright 2003, Greg Ungerer (gerg@snapgear.com)
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*/
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/****************************************************************************/
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#ifndef mcfpit_h
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#define mcfpit_h
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/****************************************************************************/
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#include <linux/config.h>
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/*
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* Get address specific defines for the 5270/5271, 5280/5282, and 5208.
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*/
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#if defined(CONFIG_M520x)
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#define MCFPIT_BASE1 0x00080000 /* Base address of TIMER1 */
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#define MCFPIT_BASE2 0x00084000 /* Base address of TIMER2 */
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#else
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#define MCFPIT_BASE1 0x00150000 /* Base address of TIMER1 */
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#define MCFPIT_BASE2 0x00160000 /* Base address of TIMER2 */
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#define MCFPIT_BASE3 0x00170000 /* Base address of TIMER3 */
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#define MCFPIT_BASE4 0x00180000 /* Base address of TIMER4 */
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#endif
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/*
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* Define the PIT timer register set addresses.
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*/
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struct mcfpit {
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unsigned short pcsr; /* PIT control and status */
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unsigned short pmr; /* PIT modulus register */
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unsigned short pcntr; /* PIT count register */
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} __attribute__((packed));
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/*
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* Bit definitions for the PIT Control and Status register.
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*/
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#define MCFPIT_PCSR_CLK1 0x0000 /* System clock divisor */
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#define MCFPIT_PCSR_CLK2 0x0100 /* System clock divisor */
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#define MCFPIT_PCSR_CLK4 0x0200 /* System clock divisor */
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#define MCFPIT_PCSR_CLK8 0x0300 /* System clock divisor */
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#define MCFPIT_PCSR_CLK16 0x0400 /* System clock divisor */
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#define MCFPIT_PCSR_CLK32 0x0500 /* System clock divisor */
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#define MCFPIT_PCSR_CLK64 0x0600 /* System clock divisor */
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#define MCFPIT_PCSR_CLK128 0x0700 /* System clock divisor */
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#define MCFPIT_PCSR_CLK256 0x0800 /* System clock divisor */
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#define MCFPIT_PCSR_CLK512 0x0900 /* System clock divisor */
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#define MCFPIT_PCSR_CLK1024 0x0a00 /* System clock divisor */
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#define MCFPIT_PCSR_CLK2048 0x0b00 /* System clock divisor */
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#define MCFPIT_PCSR_CLK4096 0x0c00 /* System clock divisor */
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#define MCFPIT_PCSR_CLK8192 0x0d00 /* System clock divisor */
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#define MCFPIT_PCSR_CLK16384 0x0e00 /* System clock divisor */
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#define MCFPIT_PCSR_CLK32768 0x0f00 /* System clock divisor */
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#define MCFPIT_PCSR_DOZE 0x0040 /* Clock run in doze mode */
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#define MCFPIT_PCSR_HALTED 0x0020 /* Clock run in halt mode */
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#define MCFPIT_PCSR_OVW 0x0010 /* Overwrite PIT counter now */
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#define MCFPIT_PCSR_PIE 0x0008 /* Enable PIT interrupt */
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#define MCFPIT_PCSR_PIF 0x0004 /* PIT interrupt flag */
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#define MCFPIT_PCSR_RLD 0x0002 /* Reload counter */
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#define MCFPIT_PCSR_EN 0x0001 /* Enable PIT */
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#define MCFPIT_PCSR_DISABLE 0x0000 /* Disable PIT */
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/****************************************************************************/
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#endif /* mcfpit_h */
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