1 /* 2 * linux/arch/m68k/sun3x/time.c 3 * 4 * Sun3x-specific time handling 5 */ 6 7 #include <linux/types.h> 8 #include <linux/kd.h> 9 #include <linux/init.h> 10 #include <linux/sched.h> 11 #include <linux/kernel_stat.h> 12 #include <linux/interrupt.h> 13 #include <linux/rtc.h> 14 #include <linux/bcd.h> 15 16 #include <asm/irq.h> 17 #include <asm/io.h> 18 #include <asm/traps.h> 19 #include <asm/sun3x.h> 20 #include <asm/sun3ints.h> 21 #include <asm/rtc.h> 22 23 #include "time.h" 24 25 #define M_CONTROL 0xf8 26 #define M_SEC 0xf9 27 #define M_MIN 0xfa 28 #define M_HOUR 0xfb 29 #define M_DAY 0xfc 30 #define M_DATE 0xfd 31 #define M_MONTH 0xfe 32 #define M_YEAR 0xff 33 34 #define C_WRITE 0x80 35 #define C_READ 0x40 36 #define C_SIGN 0x20 37 #define C_CALIB 0x1f 38 39 int sun3x_hwclk(int set, struct rtc_time *t) 40 { 41 volatile struct mostek_dt *h = 42 (struct mostek_dt *)(SUN3X_EEPROM+M_CONTROL); 43 unsigned long flags; 44 45 local_irq_save(flags); 46 47 if(set) { 48 h->csr |= C_WRITE; 49 h->sec = bin2bcd(t->tm_sec); 50 h->min = bin2bcd(t->tm_min); 51 h->hour = bin2bcd(t->tm_hour); 52 h->wday = bin2bcd(t->tm_wday); 53 h->mday = bin2bcd(t->tm_mday); 54 h->month = bin2bcd(t->tm_mon); 55 h->year = bin2bcd(t->tm_year); 56 h->csr &= ~C_WRITE; 57 } else { 58 h->csr |= C_READ; 59 t->tm_sec = bcd2bin(h->sec); 60 t->tm_min = bcd2bin(h->min); 61 t->tm_hour = bcd2bin(h->hour); 62 t->tm_wday = bcd2bin(h->wday); 63 t->tm_mday = bcd2bin(h->mday); 64 t->tm_mon = bcd2bin(h->month); 65 t->tm_year = bcd2bin(h->year); 66 h->csr &= ~C_READ; 67 } 68 69 local_irq_restore(flags); 70 71 return 0; 72 } 73 /* Not much we can do here */ 74 u32 sun3x_gettimeoffset(void) 75 { 76 return 0L; 77 } 78 79 #if 0 80 static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs) 81 { 82 void (*vector)(int, void *, struct pt_regs *) = dev_id; 83 84 /* Clear the pending interrupt - pulse the enable line low */ 85 disable_irq(5); 86 enable_irq(5); 87 88 vector(irq, NULL, regs); 89 } 90 #endif 91 92 void __init sun3x_sched_init(irq_handler_t vector) 93 { 94 95 sun3_disable_interrupts(); 96 97 98 /* Pulse enable low to get the clock started */ 99 sun3_disable_irq(5); 100 sun3_enable_irq(5); 101 sun3_enable_interrupts(); 102 } 103