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Diffstat (limited to '')
| -rw-r--r-- | arch/m68k/sun3/intersil.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/m68k/sun3/intersil.c b/arch/m68k/sun3/intersil.c new file mode 100644 index 000000000..8fc74864d --- /dev/null +++ b/arch/m68k/sun3/intersil.c @@ -0,0 +1,69 @@ +/* + * arch/m68k/sun3/intersil.c + * + * basic routines for accessing the intersil clock within the sun3 machines + * + * started 11/12/1999 Sam Creasey + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/kernel.h> +#include <linux/rtc.h> + +#include <asm/errno.h> +#include <asm/intersil.h> +#include <asm/machdep.h> + + +/* bits to set for start/run of the intersil */ +#define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE) +#define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE) + +/* get/set hwclock */ + +int sun3_hwclk(int set, struct rtc_time *t) +{ + volatile struct intersil_dt *todintersil; + unsigned long flags; + + todintersil = (struct intersil_dt *) &intersil_clock->counter; + + local_irq_save(flags); + + intersil_clock->cmd_reg = STOP_VAL; + + /* set or read the clock */ + if(set) { + todintersil->csec = 0; + todintersil->hour = t->tm_hour; + todintersil->minute = t->tm_min; + todintersil->second = t->tm_sec; + todintersil->month = t->tm_mon + 1; + todintersil->day = t->tm_mday; + todintersil->year = (t->tm_year - 68) % 100; + todintersil->weekday = t->tm_wday; + } else { + /* read clock */ + t->tm_sec = todintersil->csec; + t->tm_hour = todintersil->hour; + t->tm_min = todintersil->minute; + t->tm_sec = todintersil->second; + t->tm_mon = todintersil->month - 1; + t->tm_mday = todintersil->day; + t->tm_year = todintersil->year + 68; + t->tm_wday = todintersil->weekday; + if (t->tm_year < 70) + t->tm_year += 100; + } + + intersil_clock->cmd_reg = START_VAL; + + local_irq_restore(flags); + + return 0; + +} + |