1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/arch/m68k/sun3x/time.c 4 * 5 * Sun3x-specific time handling 6 */ 7 8 #include <linux/types.h> 9 #include <linux/kd.h> 10 #include <linux/init.h> 11 #include <linux/sched.h> 12 #include <linux/kernel_stat.h> 13 #include <linux/interrupt.h> 14 #include <linux/rtc.h> 15 #include <linux/bcd.h> 16 17 #include <asm/irq.h> 18 #include <asm/io.h> 19 #include <asm/machdep.h> 20 #include <asm/traps.h> 21 #include <asm/sun3x.h> 22 #include <asm/sun3ints.h> 23 24 #include "time.h" 25 26 #define M_CONTROL 0xf8 27 #define M_SEC 0xf9 28 #define M_MIN 0xfa 29 #define M_HOUR 0xfb 30 #define M_DAY 0xfc 31 #define M_DATE 0xfd 32 #define M_MONTH 0xfe 33 #define M_YEAR 0xff 34 35 #define C_WRITE 0x80 36 #define C_READ 0x40 37 #define C_SIGN 0x20 38 #define C_CALIB 0x1f 39 sun3x_hwclk(int set,struct rtc_time * t)40 int sun3x_hwclk(int set, struct rtc_time *t) 41 { 42 volatile struct mostek_dt *h = 43 (struct mostek_dt *)(SUN3X_EEPROM+M_CONTROL); 44 unsigned long flags; 45 46 local_irq_save(flags); 47 48 if(set) { 49 h->csr |= C_WRITE; 50 h->sec = bin2bcd(t->tm_sec); 51 h->min = bin2bcd(t->tm_min); 52 h->hour = bin2bcd(t->tm_hour); 53 h->wday = bin2bcd(t->tm_wday); 54 h->mday = bin2bcd(t->tm_mday); 55 h->month = bin2bcd(t->tm_mon + 1); 56 h->year = bin2bcd(t->tm_year % 100); 57 h->csr &= ~C_WRITE; 58 } else { 59 h->csr |= C_READ; 60 t->tm_sec = bcd2bin(h->sec); 61 t->tm_min = bcd2bin(h->min); 62 t->tm_hour = bcd2bin(h->hour); 63 t->tm_wday = bcd2bin(h->wday); 64 t->tm_mday = bcd2bin(h->mday); 65 t->tm_mon = bcd2bin(h->month) - 1; 66 t->tm_year = bcd2bin(h->year); 67 h->csr &= ~C_READ; 68 if (t->tm_year < 70) 69 t->tm_year += 100; 70 } 71 72 local_irq_restore(flags); 73 74 return 0; 75 } 76 /* Not much we can do here */ sun3x_gettimeoffset(void)77 u32 sun3x_gettimeoffset(void) 78 { 79 return 0L; 80 } 81 82 #if 0 83 static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs) 84 { 85 void (*vector)(int, void *, struct pt_regs *) = dev_id; 86 87 /* Clear the pending interrupt - pulse the enable line low */ 88 disable_irq(5); 89 enable_irq(5); 90 91 vector(irq, NULL, regs); 92 } 93 #endif 94 sun3x_sched_init(irq_handler_t vector)95 void __init sun3x_sched_init(irq_handler_t vector) 96 { 97 98 sun3_disable_interrupts(); 99 100 101 /* Pulse enable low to get the clock started */ 102 sun3_disable_irq(5); 103 sun3_enable_irq(5); 104 sun3_enable_interrupts(); 105 } 106
