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/* $Id: mostek.h,v 1.5 1996/04/25 06:13:17 davem Exp $
* mostek.h: Describes the various Mostek time of day clock registers.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC_MOSTEK_H
#define _SPARC_MOSTEK_H
#include <asm/idprom.h>
/* First the Mostek 48t02 clock chip. The registers other than the
* control register are in binary coded decimal.
*/
struct mostek48t02 {
char eeprom[2008]; /* This is the eeprom, don't touch! */
struct idp_struct idprom; /* The idprom lives here. */
volatile unsigned char creg; /* Control register */
volatile unsigned char sec; /* Seconds (0-59) */
volatile unsigned char min; /* Minutes (0-59) */
volatile unsigned char hour; /* Hour (0-23) */
volatile unsigned char dow; /* Day of the week (1-7) */
volatile unsigned char dom; /* Day of the month (1-31) */
volatile unsigned char mnth; /* Month of year (1-12) */
volatile unsigned char yr; /* Year (0-99) */
};
extern struct mostek48t02 *mstk48t02_regs;
/* Control register values. */
#define MSTK_CREG_WRITE 0x80 /* Must set this before placing values. */
#define MSTK_CREG_READ 0x40 /* Stop the clock, I want to fetch values. */
#define MSTK_CREG_SIGN 0x20 /* Grrr... what's this??? */
#define MSTK_YR_ZERO 1968 /* If year reg has zero, it is 1968 */
#define MSTK_CVT_YEAR(yr) ((yr) + MSTK_YR_ZERO)
/* Fun with masks. */
#define MSTK_SEC_MASK 0x7f
#define MSTK_MIN_MASK 0x7f
#define MSTK_HOUR_MASK 0x3f
#define MSTK_DOW_MASK 0x07
#define MSTK_DOM_MASK 0x3f
#define MSTK_MNTH_MASK 0x1f
#define MSTK_YR_MASK 0xff
/* Conversion routines. */
#define MSTK_REGVAL_TO_DECIMAL(x) (((x) & 0xf) + 0xa * ((x) >> 0x4))
#define MSTK_DECIMAL_TO_REGVAL(x) ((((x) / 0xa) << 0x4) + ((x) % 0xa))
/* Macros to make register access easier on our fingers. These give you
* the decimal value of the register requested if applicable. You pass
* the a pointer to a 'struct mostek48t02'.
*/
#define MSTK_REG_CREG(ptr) (ptr->creg)
#define MSTK_REG_SEC(ptr) (MSTK_REGVAL_TO_DECIMAL((ptr->sec & MSTK_SEC_MASK)))
#define MSTK_REG_MIN(ptr) (MSTK_REGVAL_TO_DECIMAL((ptr->min & MSTK_MIN_MASK)))
#define MSTK_REG_HOUR(ptr) (MSTK_REGVAL_TO_DECIMAL((ptr->hour & MSTK_HOUR_MASK)))
#define MSTK_REG_DOW(ptr) (MSTK_REGVAL_TO_DECIMAL((ptr->dow & MSTK_DOW_MASK)))
#define MSTK_REG_DOM(ptr) (MSTK_REGVAL_TO_DECIMAL((ptr->dom & MSTK_DOM_MASK)))
#define MSTK_REG_MNTH(ptr) (MSTK_REGVAL_TO_DECIMAL((ptr->mnth & MSTK_MNTH_MASK)))
#define MSTK_REG_YR(ptr) (MSTK_REGVAL_TO_DECIMAL((ptr->yr & MSTK_YR_MASK)))
/* The Mostek 48t02 clock chip. Found on Sun4m's I think. It has the
* same (basically) layout of the 48t02 chip.
*/
struct mostek48t08 {
char offset[6*1024]; /* Magic things may be here, who knows? */
struct mostek48t02 regs; /* Here is what we are interested in. */
};
extern struct mostek48t08 *mstk48t08_regs;
enum sparc_clock_type { MSTK48T02, MSTK48T08, MSTK_INVALID };
extern enum sparc_clock_type sp_clock_typ;
#endif /* !(_SPARC_MOSTEK_H) */
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