mirror of
https://github.com/torvalds/linux.git
synced 2024-11-28 07:01:32 +00:00
144 lines
5.3 KiB
C
144 lines
5.3 KiB
C
/* 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) */
|