mostek.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
- /* $Id: mostek.h,v 1.4 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)
- */
- #ifndef _SPARC64_MOSTEK_H
- #define _SPARC64_MOSTEK_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.
- *
- * We now deal with physical addresses for I/O to the chip. -DaveM
- */
- static __inline__ u8 mostek_read(unsigned long addr)
- {
- u8 ret;
- __asm__ __volatile__("lduba [%1] %2, %0"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- return ret;
- }
- static __inline__ void mostek_write(unsigned long addr, u8 val)
- {
- __asm__ __volatile__("stba %0, [%1] %2"
- : /* no outputs */
- : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- }
- #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
- 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,name)
- (MSTK_REGVAL_TO_DECIMAL(mostek_read(regs + MOSTEK_ ## name) & MSTK_ ## name ## _MASK))
- #define MSTK_SET(regs,name,value)
- do { u8 __val = mostek_read(regs + MOSTEK_ ## name);
- __val &= ~(MSTK_ ## name ## _MASK);
- __val |= (MSTK_DECIMAL_TO_REGVAL(value) &
- (MSTK_ ## name ## _MASK));
- mostek_write(regs + MOSTEK_ ## name, __val);
- } 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) (mostek_read((regs) + MOSTEK_CREG))
- #define MSTK_REG_SEC(regs) MSTK_GET(regs,SEC)
- #define MSTK_REG_MIN(regs) MSTK_GET(regs,MIN)
- #define MSTK_REG_HOUR(regs) MSTK_GET(regs,HOUR)
- #define MSTK_REG_DOW(regs) MSTK_GET(regs,DOW)
- #define MSTK_REG_DOM(regs) MSTK_GET(regs,DOM)
- #define MSTK_REG_MONTH(regs) MSTK_GET(regs,MONTH)
- #define MSTK_REG_YEAR(regs) MSTK_GET(regs,YEAR)
- #define MSTK_SET_REG_SEC(regs,value) MSTK_SET(regs,SEC,value)
- #define MSTK_SET_REG_MIN(regs,value) MSTK_SET(regs,MIN,value)
- #define MSTK_SET_REG_HOUR(regs,value) MSTK_SET(regs,HOUR,value)
- #define MSTK_SET_REG_DOW(regs,value) MSTK_SET(regs,DOW,value)
- #define MSTK_SET_REG_DOM(regs,value) MSTK_SET(regs,DOM,value)
- #define MSTK_SET_REG_MONTH(regs,value) MSTK_SET(regs,MONTH,value)
- #define MSTK_SET_REG_YEAR(regs,value) MSTK_SET(regs,YEAR,value)
- /* 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).
- */
- #define MOSTEK_48T08_OFFSET 0x0000UL /* Lower NVRAM portions */
- #define MOSTEK_48T08_48T02 0x1800UL /* Offset to 48T02 chip */
- extern unsigned long mstk48t08_regs;
- /* SUN5 systems usually have 48t59 model clock chipsets. But we keep the older
- * clock chip definitions around just in case.
- */
- #define MOSTEK_48T59_OFFSET 0x0000UL /* Lower NVRAM portions */
- #define MOSTEK_48T59_48T02 0x1800UL /* Offset to 48T02 chip */
- extern unsigned long mstk48t59_regs;
- #endif /* !(_SPARC64_MOSTEK_H) */