2 * arch/m68k/mvme147/config.c
4 * Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
5 * Cloned from Richard Hirst [richard@sleepie.demon.co.uk]
9 * Copyright (C) 1993 Hamish Macdonald
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
16 #include <linux/types.h>
17 #include <linux/kernel.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>
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>
34 #include <asm/traps.h>
35 #include <asm/machdep.h>
36 #include <asm/mvme147hw.h>
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 void mvme147_reset (void);
46 static int bcd2int (unsigned char b);
49 int __init mvme147_parse_bootinfo(const struct bi_record *bi)
51 uint16_t tag = be16_to_cpu(bi->tag);
52 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
58 void mvme147_reset(void)
60 pr_info("\r\n\nCalled mvme147_reset\r\n");
61 m147_pcc->watchdog = 0x0a; /* Clear timer */
62 m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
67 static void mvme147_get_model(char *model)
69 sprintf(model, "Motorola MVME147");
73 * This function is called during kernel startup to initialize
74 * the mvme147 IRQ handling routines.
77 void __init mvme147_init_IRQ(void)
79 m68k_setup_user_interrupt(VEC_USER, 192);
82 void __init config_mvme147(void)
84 mach_max_dma_address = 0x01000000;
85 mach_sched_init = mvme147_sched_init;
86 mach_init_IRQ = mvme147_init_IRQ;
87 arch_gettimeoffset = mvme147_gettimeoffset;
88 mach_hwclk = mvme147_hwclk;
89 mach_reset = mvme147_reset;
90 mach_get_model = mvme147_get_model;
92 /* Board type is only set by newer versions of vmelilo/tftplilo */
94 vme_brdtype = VME_TYPE_MVME147;
98 /* Using pcc tick timer 1 */
100 static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
102 irq_handler_t timer_routine = dev_id;
105 local_irq_save(flags);
106 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
107 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
108 timer_routine(0, NULL);
109 local_irq_restore(flags);
115 void mvme147_sched_init (irq_handler_t timer_routine)
117 if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, 0, "timer 1",
119 pr_err("Couldn't register timer interrupt\n");
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;
130 /* This is always executed with interrupts disabled. */
131 /* XXX There are race hazards in this code XXX */
132 u32 mvme147_gettimeoffset(void)
134 volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
141 n -= PCC_TIMER_PRELOAD;
142 return ((unsigned long)n * 25 / 4) * 1000;
145 static int bcd2int (unsigned char b)
147 return ((b>>4)*10 + (b&15));
150 int mvme147_hwclk(int op, struct rtc_time *t)
154 m147_rtc->ctrl = RTC_READ;
155 t->tm_year = bcd2int (m147_rtc->bcd_year);
156 t->tm_mon = bcd2int(m147_rtc->bcd_mth) - 1;
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);