mostek.h
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- /* $Id: mostek.h,v 1.13 2001/01/11 15:07:09 davem Exp $
- * mostek.h: Describes the various Mostek time of day clock registers.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
- * Added intersil code 05/25/98 Chris Davis (cdavis@cois.on.ca)
- */
- #ifndef _SPARC_MOSTEK_H
- #define _SPARC_MOSTEK_H
- #include <linux/config.h>
- #include <asm/idprom.h>
- /* M48T02 Register Map (adapted from Sun NVRAM/Hostid FAQ)
- *
- * Data
- * Address Function
- * Bit 7 Bit 6 Bit 5 Bit 4Bit 3 Bit 2 Bit 1 Bit 0
- * 7ff - - - - - - - - Year 00-99
- * 7fe 0 0 0 - - - - - Month 01-12
- * 7fd 0 0 - - - - - - Date 01-31
- * 7fc 0 FT 0 0 0 - - - Day 01-07
- * 7fb KS 0 - - - - - - Hours 00-23
- * 7fa 0 - - - - - - - Minutes 00-59
- * 7f9 ST - - - - - - - Seconds 00-59
- * 7f8 W R S - - - - - Control
- *
- * * ST is STOP BIT
- * * W is WRITE BIT
- * * R is READ BIT
- * * S is SIGN BIT
- * * FT is FREQ TEST BIT
- * * KS is KICK START BIT
- */
- /* The Mostek 48t02 real time clock and NVRAM chip. The registers
- * other than the control register are in binary coded decimal. Some
- * control bits also live outside the control register.
- */
- #define mostek_read(_addr) (*((volatile u8 *)(_addr)))
- #define mostek_write(_addr,_val) ((*((volatile u8 *)(_addr))) = (_val))
- #define MOSTEK_EEPROM 0x0000UL
- #define MOSTEK_IDPROM 0x07d8UL
- #define MOSTEK_CREG 0x07f8UL
- #define MOSTEK_SEC 0x07f9UL
- #define MOSTEK_MIN 0x07faUL
- #define MOSTEK_HOUR 0x07fbUL
- #define MOSTEK_DOW 0x07fcUL
- #define MOSTEK_DOM 0x07fdUL
- #define MOSTEK_MONTH 0x07feUL
- #define MOSTEK_YEAR 0x07ffUL
- struct mostek48t02 {
- volatile char eeprom[2008]; /* This is the eeprom, don't touch! */
- struct idprom 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 month; /* Month of year (1-12) */
- volatile unsigned char year; /* Year (0-99) */
- };
- extern spinlock_t mostek_lock;
- extern unsigned long mstk48t02_regs;
- /* Control register values. */
- #define MSTK_CREG_WRITE 0x80 /* Must set this before placing values. */
- #define MSTK_CREG_READ 0x40 /* Stop updates to allow a clean read. */
- #define MSTK_CREG_SIGN 0x20 /* Slow/speed clock in calibration mode. */
- /* Control bits that live in the other registers. */
- #define MSTK_STOP 0x80 /* Stop the clock oscillator. (sec) */
- #define MSTK_KICK_START 0x80 /* Kick start the clock chip. (hour) */
- #define MSTK_FREQ_TEST 0x40 /* Frequency test mode. (day) */
- #define MSTK_YEAR_ZERO 1968 /* If year reg has zero, it is 1968. */
- #define MSTK_CVT_YEAR(yr) ((yr) + MSTK_YEAR_ZERO)
- /* Masks that define how much space each value takes up. */
- #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_MONTH_MASK 0x1f
- #define MSTK_YEAR_MASK 0xff
- /* Binary coded decimal conversion macros. */
- #define MSTK_REGVAL_TO_DECIMAL(x) (((x) & 0x0F) + 0x0A * ((x) >> 0x04))
- #define MSTK_DECIMAL_TO_REGVAL(x) ((((x) / 0x0A) << 0x04) + ((x) % 0x0A))
- /* Generic register set and get macros for internal use. */
- #define MSTK_GET(regs,var,mask) (MSTK_REGVAL_TO_DECIMAL(((struct mostek48t02 *)regs)->var & MSTK_ ## mask ## _MASK))
- #define MSTK_SET(regs,var,value,mask) do { ((struct mostek48t02 *)regs)->var &= ~(MSTK_ ## mask ## _MASK); ((struct mostek48t02 *)regs)->var |= MSTK_DECIMAL_TO_REGVAL(value) & (MSTK_ ## mask ## _MASK); } while (0)
- /* 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(regs) (((struct mostek48t02 *)regs)->creg)
- #define MSTK_REG_SEC(regs) MSTK_GET(regs,sec,SEC)
- #define MSTK_REG_MIN(regs) MSTK_GET(regs,min,MIN)
- #define MSTK_REG_HOUR(regs) MSTK_GET(regs,hour,HOUR)
- #define MSTK_REG_DOW(regs) MSTK_GET(regs,dow,DOW)
- #define MSTK_REG_DOM(regs) MSTK_GET(regs,dom,DOM)
- #define MSTK_REG_MONTH(regs) MSTK_GET(regs,month,MONTH)
- #define MSTK_REG_YEAR(regs) MSTK_GET(regs,year,YEAR)
- #define MSTK_SET_REG_SEC(regs,value) MSTK_SET(regs,sec,value,SEC)
- #define MSTK_SET_REG_MIN(regs,value) MSTK_SET(regs,min,value,MIN)
- #define MSTK_SET_REG_HOUR(regs,value) MSTK_SET(regs,hour,value,HOUR)
- #define MSTK_SET_REG_DOW(regs,value) MSTK_SET(regs,dow,value,DOW)
- #define MSTK_SET_REG_DOM(regs,value) MSTK_SET(regs,dom,value,DOM)
- #define MSTK_SET_REG_MONTH(regs,value) MSTK_SET(regs,month,value,MONTH)
- #define MSTK_SET_REG_YEAR(regs,value) MSTK_SET(regs,year,value,YEAR)
- /* The Mostek 48t08 clock chip. Found on Sun4m's I think. It has the
- * same (basically) layout of the 48t02 chip except for the extra
- * NVRAM on board (8 KB against the 48t02's 2 KB).
- */
- 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;
- extern enum sparc_clock_type sp_clock_typ;
- #ifdef CONFIG_SUN4
- enum sparc_clock_type { MSTK48T02, MSTK48T08,
- INTERSIL, MSTK_INVALID };
- #else
- enum sparc_clock_type { MSTK48T02, MSTK48T08,
- MSTK_INVALID };
- #endif
- #ifdef CONFIG_SUN4
- /* intersil on a sun 4/260 code data from harris doc */
- struct intersil_dt {
- volatile unsigned char int_csec;
- volatile unsigned char int_hour;
- volatile unsigned char int_min;
- volatile unsigned char int_sec;
- volatile unsigned char int_month;
- volatile unsigned char int_day;
- volatile unsigned char int_year;
- volatile unsigned char int_dow;
- };
- struct intersil {
- struct intersil_dt clk;
- struct intersil_dt cmp;
- volatile unsigned char int_intr_reg;
- volatile unsigned char int_cmd_reg;
- };
- #define INTERSIL_STOP 0x0
- #define INTERSIL_START 0x8
- #define INTERSIL_INTR_DISABLE 0x0
- #define INTERSIL_INTR_ENABLE 0x10
- #define INTERSIL_32K 0x0
- #define INTERSIL_NORMAL 0x0
- #define INTERSIL_24H 0x4
- #define INTERSIL_INT_100HZ 0x2
- /* end of intersil info */
- #endif
- #endif /* !(_SPARC_MOSTEK_H) */