/* mostek.h: Describes the various Mostek time of day clock registers. * * Copyright (C) 1995 David S. Miller (davem@davemloft.net) * 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(void __iomem *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(void __iomem *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 void __iomem *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 0xffU /* 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 */ /* 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 */ #endif /* !(_SPARC64_MOSTEK_H) */