1 /* 2 * arch/m68k/mvme147/config.c 3 * 4 * Copyright (C) 1996 Dave Frascone [chaos@mindspring.com] 5 * Cloned from Richard Hirst [richard@sleepie.demon.co.uk] 6 * 7 * Based on: 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * 11 * This file is subject to the terms and conditions of the GNU General Public 12 * License. See the file README.legal in the main directory of this archive 13 * for more details. 14 */ 15 16 #include <linux/types.h> 17 #include <linux/kernel.h> 18 #include <linux/mm.h> 19 #include <linux/tty.h> 20 #include <linux/console.h> 21 #include <linux/linkage.h> 22 #include <linux/init.h> 23 #include <linux/major.h> 24 #include <linux/genhd.h> 25 #include <linux/rtc.h> 26 #include <linux/interrupt.h> 27 28 #include <asm/bootinfo.h> 29 #include <asm/bootinfo-vme.h> 30 #include <asm/byteorder.h> 31 #include <asm/pgtable.h> 32 #include <asm/setup.h> 33 #include <asm/irq.h> 34 #include <asm/traps.h> 35 #include <asm/machdep.h> 36 #include <asm/mvme147hw.h> 37 38 39 static void mvme147_get_model(char *model); 40 extern void mvme147_sched_init(irq_handler_t handler); 41 extern u32 mvme147_gettimeoffset(void); 42 extern int mvme147_hwclk (int, struct rtc_time *); 43 extern int mvme147_set_clock_mmss (unsigned long); 44 extern void mvme147_reset (void); 45 46 47 static int bcd2int (unsigned char b); 48 49 /* Save tick handler routine pointer, will point to xtime_update() in 50 * kernel/time/timekeeping.c, called via mvme147_process_int() */ 51 52 irq_handler_t tick_handler; 53 54 55 int __init mvme147_parse_bootinfo(const struct bi_record *bi) 56 { 57 uint16_t tag = be16_to_cpu(bi->tag); 58 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO) 59 return 0; 60 else 61 return 1; 62 } 63 64 void mvme147_reset(void) 65 { 66 pr_info("\r\n\nCalled mvme147_reset\r\n"); 67 m147_pcc->watchdog = 0x0a; /* Clear timer */ 68 m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */ 69 while (1) 70 ; 71 } 72 73 static void mvme147_get_model(char *model) 74 { 75 sprintf(model, "Motorola MVME147"); 76 } 77 78 /* 79 * This function is called during kernel startup to initialize 80 * the mvme147 IRQ handling routines. 81 */ 82 83 void __init mvme147_init_IRQ(void) 84 { 85 m68k_setup_user_interrupt(VEC_USER, 192); 86 } 87 88 void __init config_mvme147(void) 89 { 90 mach_max_dma_address = 0x01000000; 91 mach_sched_init = mvme147_sched_init; 92 mach_init_IRQ = mvme147_init_IRQ; 93 arch_gettimeoffset = mvme147_gettimeoffset; 94 mach_hwclk = mvme147_hwclk; 95 mach_set_clock_mmss = mvme147_set_clock_mmss; 96 mach_reset = mvme147_reset; 97 mach_get_model = mvme147_get_model; 98 99 /* Board type is only set by newer versions of vmelilo/tftplilo */ 100 if (!vme_brdtype) 101 vme_brdtype = VME_TYPE_MVME147; 102 } 103 104 105 /* Using pcc tick timer 1 */ 106 107 static irqreturn_t mvme147_timer_int (int irq, void *dev_id) 108 { 109 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; 110 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1; 111 return tick_handler(irq, dev_id); 112 } 113 114 115 void mvme147_sched_init (irq_handler_t timer_routine) 116 { 117 tick_handler = timer_routine; 118 if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, 0, "timer 1", NULL)) 119 pr_err("Couldn't register timer interrupt\n"); 120 121 /* Init the clock with a value */ 122 /* our clock goes off every 6.25us */ 123 m147_pcc->t1_preload = PCC_TIMER_PRELOAD; 124 m147_pcc->t1_cntrl = 0x0; /* clear timer */ 125 m147_pcc->t1_cntrl = 0x3; /* start timer */ 126 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */ 127 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1; 128 } 129 130 /* This is always executed with interrupts disabled. */ 131 /* XXX There are race hazards in this code XXX */ 132 u32 mvme147_gettimeoffset(void) 133 { 134 volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012; 135 unsigned short n; 136 137 n = *cp; 138 while (n != *cp) 139 n = *cp; 140 141 n -= PCC_TIMER_PRELOAD; 142 return ((unsigned long)n * 25 / 4) * 1000; 143 } 144 145 static int bcd2int (unsigned char b) 146 { 147 return ((b>>4)*10 + (b&15)); 148 } 149 150 int mvme147_hwclk(int op, struct rtc_time *t) 151 { 152 #warning check me! 153 if (!op) { 154 m147_rtc->ctrl = RTC_READ; 155 t->tm_year = bcd2int (m147_rtc->bcd_year); 156 t->tm_mon = bcd2int (m147_rtc->bcd_mth); 157 t->tm_mday = bcd2int (m147_rtc->bcd_dom); 158 t->tm_hour = bcd2int (m147_rtc->bcd_hr); 159 t->tm_min = bcd2int (m147_rtc->bcd_min); 160 t->tm_sec = bcd2int (m147_rtc->bcd_sec); 161 m147_rtc->ctrl = 0; 162 } 163 return 0; 164 } 165 166 int mvme147_set_clock_mmss (unsigned long nowtime) 167 { 168 return 0; 169 } 170