From 0c698dcaa70275eb8814f665b545547cee013892 Mon Sep 17 00:00:00 2001 From: Jean-Christophe PLAGNIOL-VILLARD Date: Sat, 24 Nov 2007 20:59:50 +0100 Subject: drivers/rtc : move rtc drivers to drivers/rtc Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- rtc/ds1302.c | 327 ----------------------------------------------------------- 1 file changed, 327 deletions(-) delete mode 100644 rtc/ds1302.c (limited to 'rtc/ds1302.c') diff --git a/rtc/ds1302.c b/rtc/ds1302.c deleted file mode 100644 index 55af130..0000000 --- a/rtc/ds1302.c +++ /dev/null @@ -1,327 +0,0 @@ -/* - * ds1302.c - Support for the Dallas Semiconductor DS1302 Timekeeping Chip - * - * Rex G. Feany - * - */ - -#include -#include -#include - -#if defined(CONFIG_RTC_DS1302) && defined(CONFIG_CMD_DATE) - -/* GPP Pins */ -#define DATA 0x200 -#define SCLK 0x400 -#define RST 0x800 - -/* Happy Fun Defines(tm) */ -#define RESET rtc_go_low(RST), rtc_go_low(SCLK) -#define N_RESET rtc_go_high(RST), rtc_go_low(SCLK) - -#define CLOCK_HIGH rtc_go_high(SCLK) -#define CLOCK_LOW rtc_go_low(SCLK) - -#define DATA_HIGH rtc_go_high(DATA) -#define DATA_LOW rtc_go_low(DATA) -#define DATA_READ (GTREGREAD(GPP_VALUE) & DATA) - -#undef RTC_DEBUG - -#ifdef RTC_DEBUG -# define DPRINTF(x,args...) printf("ds1302: " x , ##args) -static inline void DUMP(const char *ptr, int num) -{ - while (num--) printf("%x ", *ptr++); - printf("]\n"); -} -#else -# define DPRINTF(x,args...) -# define DUMP(ptr, num) -#endif - -/* time data format for DS1302 */ -struct ds1302_st -{ - unsigned char CH:1; /* clock halt 1=stop 0=start */ - unsigned char sec10:3; - unsigned char sec:4; - - unsigned char zero0:1; - unsigned char min10:3; - unsigned char min:4; - - unsigned char fmt:1; /* 1=12 hour 0=24 hour */ - unsigned char zero1:1; - unsigned char hr10:2; /* 10 (0-2) or am/pm (am/pm, 0-1) */ - unsigned char hr:4; - - unsigned char zero2:2; - unsigned char date10:2; - unsigned char date:4; - - unsigned char zero3:3; - unsigned char month10:1; - unsigned char month:4; - - unsigned char zero4:5; - unsigned char day:3; /* day of week */ - - unsigned char year10:4; - unsigned char year:4; - - unsigned char WP:1; /* write protect 1=protect 0=unprot */ - unsigned char zero5:7; -}; - -static int ds1302_initted=0; - -/* Pin control */ -static inline void -rtc_go_high(unsigned int mask) -{ - unsigned int f = GTREGREAD(GPP_VALUE) | mask; - - GT_REG_WRITE(GPP_VALUE, f); -} - -static inline void -rtc_go_low(unsigned int mask) -{ - unsigned int f = GTREGREAD(GPP_VALUE) & ~mask; - - GT_REG_WRITE(GPP_VALUE, f); -} - -static inline void -rtc_go_input(unsigned int mask) -{ - unsigned int f = GTREGREAD(GPP_IO_CONTROL) & ~mask; - - GT_REG_WRITE(GPP_IO_CONTROL, f); -} - -static inline void -rtc_go_output(unsigned int mask) -{ - unsigned int f = GTREGREAD(GPP_IO_CONTROL) | mask; - - GT_REG_WRITE(GPP_IO_CONTROL, f); -} - -/* Access data in RTC */ - -static void -write_byte(unsigned char b) -{ - int i; - unsigned char mask=1; - - for(i=0;i<8;i++) { - CLOCK_LOW; /* Lower clock */ - (b&mask)?DATA_HIGH:DATA_LOW; /* set data */ - udelay(1); - CLOCK_HIGH; /* latch data with rising clock */ - udelay(1); - mask=mask<<1; - } -} - -static unsigned char -read_byte(void) -{ - int i; - unsigned char mask=1; - unsigned char b=0; - - for(i=0;i<8;i++) { - CLOCK_LOW; - udelay(1); - if (DATA_READ) b|=mask; /* if this bit is high, set in b */ - CLOCK_HIGH; /* clock out next bit */ - udelay(1); - mask=mask<<1; - } - return b; -} - -static void -read_ser_drv(unsigned char addr, unsigned char *buf, int count) -{ - int i; -#ifdef RTC_DEBUG - char *foo = buf; -#endif - - DPRINTF("READ 0x%x bytes @ 0x%x [ ", count, addr); - - addr|=1; /* READ */ - N_RESET; - udelay(4); - write_byte(addr); - rtc_go_input(DATA); /* Put gpp pin into input mode */ - udelay(1); - for(i=0;i9) { - printf("ds1302: Year was corrupted, fixing\n"); - bbclk.year10=100/10; /* 2000 - why not? ;) */ - bbclk.year=0; - mod=1; - } - - /* Write out the changes if needed */ - if (mod) { - /* enable write protect */ - bbclk.WP = 1; - write_ser_drv(0xbe,(unsigned char *)&bbclk,8); - } else { - /* Else just turn write protect on */ - b = 0x80; - write_ser_drv(0x8e,&b,1); - } - DPRINTF("init done\n"); - - ds1302_initted=1; -} - -void -rtc_reset(void) -{ - if(!ds1302_initted) rtc_init(); - /* TODO */ -} - -void -rtc_get(struct rtc_time *tmp) -{ - struct ds1302_st bbclk; - - if(!ds1302_initted) rtc_init(); - - read_ser_drv(0xbe,(unsigned char *)&bbclk, 8); /* read burst */ - - if (bbclk.CH) { - printf("ds1302: rtc_get: Clock was halted, clock probably " - "corrupt\n"); - } - - tmp->tm_sec=10*bbclk.sec10+bbclk.sec; - tmp->tm_min=10*bbclk.min10+bbclk.min; - tmp->tm_hour=10*bbclk.hr10+bbclk.hr; - tmp->tm_wday=bbclk.day; - tmp->tm_mday=10*bbclk.date10+bbclk.date; - tmp->tm_mon=10*bbclk.month10+bbclk.month; - tmp->tm_year=10*bbclk.year10+bbclk.year + 1900; - - tmp->tm_yday = 0; - tmp->tm_isdst= 0; - - DPRINTF("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", - tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, - tmp->tm_hour, tmp->tm_min, tmp->tm_sec ); -} - -void -rtc_set(struct rtc_time *tmp) -{ - struct ds1302_st bbclk; - unsigned char b=0; - - if(!ds1302_initted) rtc_init(); - - DPRINTF("Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n", - tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday, - tmp->tm_hour, tmp->tm_min, tmp->tm_sec); - - memset(&bbclk,0,sizeof(bbclk)); - bbclk.CH=0; /* dont halt */ - bbclk.WP=1; /* write protect when we're done */ - - bbclk.sec10=tmp->tm_sec/10; - bbclk.sec=tmp->tm_sec%10; - - bbclk.min10=tmp->tm_min/10; - bbclk.min=tmp->tm_min%10; - - bbclk.hr10=tmp->tm_hour/10; - bbclk.hr=tmp->tm_hour%10; - - bbclk.day=tmp->tm_wday; - - bbclk.date10=tmp->tm_mday/10; - bbclk.date=tmp->tm_mday%10; - - bbclk.month10=tmp->tm_mon/10; - bbclk.month=tmp->tm_mon%10; - - tmp->tm_year -= 1900; - bbclk.year10=tmp->tm_year/10; - bbclk.year=tmp->tm_year%10; - - write_ser_drv(0x8e,&b,1); /* disable write protect */ - write_ser_drv(0xbe,(unsigned char *)&bbclk, 8); /* write burst */ -} - -#endif -- cgit v1.1