1 /* 2 * arch/m68k/sun3/intersil.c 3 * 4 * basic routines for accessing the intersil clock within the sun3 machines 5 * 6 * started 11/12/1999 Sam Creasey 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file COPYING in the main directory of this archive 10 * for more details. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/rtc.h> 15 16 #include <asm/errno.h> 17 #include <asm/rtc.h> 18 #include <asm/intersil.h> 19 20 21 /* bits to set for start/run of the intersil */ 22 #define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE) 23 #define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE) 24 25 /* does this need to be implemented? */ 26 u32 sun3_gettimeoffset(void) 27 { 28 return 1000; 29 } 30 31 32 /* get/set hwclock */ 33 34 int sun3_hwclk(int set, struct rtc_time *t) 35 { 36 volatile struct intersil_dt *todintersil; 37 unsigned long flags; 38 39 todintersil = (struct intersil_dt *) &intersil_clock->counter; 40 41 local_irq_save(flags); 42 43 intersil_clock->cmd_reg = STOP_VAL; 44 45 /* set or read the clock */ 46 if(set) { 47 todintersil->csec = 0; 48 todintersil->hour = t->tm_hour; 49 todintersil->minute = t->tm_min; 50 todintersil->second = t->tm_sec; 51 todintersil->month = t->tm_mon; 52 todintersil->day = t->tm_mday; 53 todintersil->year = t->tm_year - 68; 54 todintersil->weekday = t->tm_wday; 55 } else { 56 /* read clock */ 57 t->tm_sec = todintersil->csec; 58 t->tm_hour = todintersil->hour; 59 t->tm_min = todintersil->minute; 60 t->tm_sec = todintersil->second; 61 t->tm_mon = todintersil->month; 62 t->tm_mday = todintersil->day; 63 t->tm_year = todintersil->year + 68; 64 t->tm_wday = todintersil->weekday; 65 } 66 67 intersil_clock->cmd_reg = START_VAL; 68 69 local_irq_restore(flags); 70 71 return 0; 72 73 } 74 75