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/system.h> 18 #include <asm/semaphore.h> 19 #include <asm/rtc.h> 20 #include <asm/intersil.h> 21 22 23 /* bits to set for start/run of the intersil */ 24 #define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE) 25 #define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE) 26 27 /* does this need to be implemented? */ 28 unsigned long sun3_gettimeoffset(void) 29 { 30 return 1; 31 } 32 33 34 /* get/set hwclock */ 35 36 int sun3_hwclk(int set, struct rtc_time *t) 37 { 38 volatile struct intersil_dt *todintersil; 39 unsigned long flags; 40 41 todintersil = (struct intersil_dt *) &intersil_clock->counter; 42 43 local_irq_save(flags); 44 45 intersil_clock->cmd_reg = STOP_VAL; 46 47 /* set or read the clock */ 48 if(set) { 49 todintersil->csec = 0; 50 todintersil->hour = t->tm_hour; 51 todintersil->minute = t->tm_min; 52 todintersil->second = t->tm_sec; 53 todintersil->month = t->tm_mon; 54 todintersil->day = t->tm_mday; 55 todintersil->year = t->tm_year - 68; 56 todintersil->weekday = t->tm_wday; 57 } else { 58 /* read clock */ 59 t->tm_sec = todintersil->csec; 60 t->tm_hour = todintersil->hour; 61 t->tm_min = todintersil->minute; 62 t->tm_sec = todintersil->second; 63 t->tm_mon = todintersil->month; 64 t->tm_mday = todintersil->day; 65 t->tm_year = todintersil->year + 68; 66 t->tm_wday = todintersil->weekday; 67 } 68 69 intersil_clock->cmd_reg = START_VAL; 70 71 local_irq_restore(flags); 72 73 return 0; 74 75 } 76 77