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/*
* Machine dependent access functions for RTC registers.
*/
#ifndef _ASM_MC146818RTC_H
#define _ASM_MC146818RTC_H
#include <asm/rtc.h>
#define RTC_ALWAYS_BCD 1
/* FIXME:RTC Interrupt feature is not implemented yet. */
#undef RTC_IRQ
#define RTC_IRQ 0
#if defined(__sh3__)
#define RTC_PORT(n) (R64CNT+(n)*2)
#define CMOS_READ(addr) __CMOS_READ(addr,b)
#define CMOS_WRITE(val,addr) __CMOS_WRITE(val,addr,b)
#elif defined(__SH4__)
#define RTC_PORT(n) (R64CNT+(n)*4)
#define CMOS_READ(addr) __CMOS_READ(addr,w)
#define CMOS_WRITE(val,addr) __CMOS_WRITE(val,addr,w)
#endif
#define __CMOS_READ(addr, s) ({ \
unsigned char val=0, rcr1, rcr2, r64cnt, retry; \
switch(addr) { \
case RTC_SECONDS: \
val = ctrl_inb(RSECCNT); \
break; \
case RTC_SECONDS_ALARM: \
val = ctrl_inb(RSECAR); \
break; \
case RTC_MINUTES: \
val = ctrl_inb(RMINCNT); \
break; \
case RTC_MINUTES_ALARM: \
val = ctrl_inb(RMINAR); \
break; \
case RTC_HOURS: \
val = ctrl_inb(RHRCNT); \
break; \
case RTC_HOURS_ALARM: \
val = ctrl_inb(RHRAR); \
break; \
case RTC_DAY_OF_WEEK: \
val = ctrl_inb(RWKCNT); \
break; \
case RTC_DAY_OF_MONTH: \
val = ctrl_inb(RDAYCNT); \
break; \
case RTC_MONTH: \
val = ctrl_inb(RMONCNT); \
break; \
case RTC_YEAR: \
val = ctrl_in##s(RYRCNT); \
break; \
case RTC_REG_A: /* RTC_FREQ_SELECT */ \
rcr2 = ctrl_inb(RCR2); \
val = (rcr2 & RCR2_PESMASK) >> 4; \
rcr1 = ctrl_inb(RCR1); \
rcr1 = (rcr1 & (RCR1_CIE | RCR1_AIE)) | RCR1_AF;\
retry = 0; \
do { \
ctrl_outb(rcr1, RCR1); /* clear CF */ \
r64cnt = ctrl_inb(R64CNT); \
} while((ctrl_inb(RCR1) & RCR1_CF) && retry++ < 1000);\
r64cnt ^= RTC_BIT_INVERTED; \
if(r64cnt == 0x7f || r64cnt == 0) \
val |= RTC_UIP; \
break; \
case RTC_REG_B: /* RTC_CONTROL */ \
rcr1 = ctrl_inb(RCR1); \
rcr2 = ctrl_inb(RCR2); \
if(rcr1 & RCR1_CIE) val |= RTC_UIE; \
if(rcr1 & RCR1_AIE) val |= RTC_AIE; \
if(rcr2 & RCR2_PESMASK) val |= RTC_PIE; \
if(!(rcr2 & RCR2_START))val |= RTC_SET; \
val |= RTC_24H; \
break; \
case RTC_REG_C: /* RTC_INTR_FLAGS */ \
rcr1 = ctrl_inb(RCR1); \
rcr1 &= ~(RCR1_CF | RCR1_AF); \
ctrl_outb(rcr1, RCR1); \
rcr2 = ctrl_inb(RCR2); \
rcr2 &= ~RCR2_PEF; \
ctrl_outb(rcr2, RCR2); \
break; \
case RTC_REG_D: /* RTC_VALID */ \
/* Always valid ... */ \
val = RTC_VRT; \
break; \
default: \
break; \
} \
val; \
})
#define __CMOS_WRITE(val, addr, s) ({ \
unsigned char rcr1,rcr2; \
switch(addr) { \
case RTC_SECONDS: \
ctrl_outb(val, RSECCNT); \
break; \
case RTC_SECONDS_ALARM: \
ctrl_outb(val, RSECAR); \
break; \
case RTC_MINUTES: \
ctrl_outb(val, RMINCNT); \
break; \
case RTC_MINUTES_ALARM: \
ctrl_outb(val, RMINAR); \
break; \
case RTC_HOURS: \
ctrl_outb(val, RHRCNT); \
break; \
case RTC_HOURS_ALARM: \
ctrl_outb(val, RHRAR); \
break; \
case RTC_DAY_OF_WEEK: \
ctrl_outb(val, RWKCNT); \
break; \
case RTC_DAY_OF_MONTH: \
ctrl_outb(val, RDAYCNT); \
break; \
case RTC_MONTH: \
ctrl_outb(val, RMONCNT); \
break; \
case RTC_YEAR: \
ctrl_out##s((ctrl_in##s(RYRCNT) & 0xff00) | (val & 0xff), RYRCNT);\
break; \
case RTC_REG_A: /* RTC_FREQ_SELECT */ \
rcr2 = ctrl_inb(RCR2); \
if((val & RTC_DIV_CTL) == RTC_DIV_RESET2) \
rcr2 |= RCR2_RESET; \
ctrl_outb(rcr2, RCR2); \
break; \
case RTC_REG_B: /* RTC_CONTROL */ \
rcr1 = (ctrl_inb(RCR1) & 0x99) | RCR1_AF; \
if(val & RTC_AIE) rcr1 |= RCR1_AIE; \
else rcr1 &= ~RCR1_AIE; \
if(val & RTC_UIE) rcr1 |= RCR1_CIE; \
else rcr1 &= ~RCR1_CIE; \
ctrl_outb(rcr1, RCR1); \
rcr2 = ctrl_inb(RCR2); \
if(val & RTC_SET) rcr2 &= ~RCR2_START; \
else rcr2 |= RCR2_START; \
ctrl_outb(rcr2, RCR2); \
break; \
case RTC_REG_C: /* RTC_INTR_FLAGS */ \
break; \
case RTC_REG_D: /* RTC_VALID */ \
break; \
default: \
break; \
} \
})
#endif /* _ASM_MC146818RTC_H */
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