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/rtc.h>
36#include <asm/machdep.h>
37#include <asm/mvme147hw.h>
38
39
40static void mvme147_get_model(char *model);
41extern void mvme147_sched_init(irq_handler_t handler);
42extern u32 mvme147_gettimeoffset(void);
43extern int mvme147_hwclk (int, struct rtc_time *);
44extern int mvme147_set_clock_mmss (unsigned long);
45extern void mvme147_reset (void);
46
47
48static int bcd2int (unsigned char b);
49
50/* Save tick handler routine pointer, will point to xtime_update() in
51 * kernel/time/timekeeping.c, called via mvme147_process_int() */
52
53irq_handler_t tick_handler;
54
55
56int __init mvme147_parse_bootinfo(const struct bi_record *bi)
57{
58	uint16_t tag = be16_to_cpu(bi->tag);
59	if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
60		return 0;
61	else
62		return 1;
63}
64
65void mvme147_reset(void)
66{
67	printk ("\r\n\nCalled mvme147_reset\r\n");
68	m147_pcc->watchdog = 0x0a;	/* Clear timer */
69	m147_pcc->watchdog = 0xa5;	/* Enable watchdog - 100ms to reset */
70	while (1)
71		;
72}
73
74static void mvme147_get_model(char *model)
75{
76	sprintf(model, "Motorola MVME147");
77}
78
79/*
80 * This function is called during kernel startup to initialize
81 * the mvme147 IRQ handling routines.
82 */
83
84void __init mvme147_init_IRQ(void)
85{
86	m68k_setup_user_interrupt(VEC_USER, 192);
87}
88
89void __init config_mvme147(void)
90{
91	mach_max_dma_address	= 0x01000000;
92	mach_sched_init		= mvme147_sched_init;
93	mach_init_IRQ		= mvme147_init_IRQ;
94	arch_gettimeoffset	= mvme147_gettimeoffset;
95	mach_hwclk		= mvme147_hwclk;
96	mach_set_clock_mmss	= mvme147_set_clock_mmss;
97	mach_reset		= mvme147_reset;
98	mach_get_model		= mvme147_get_model;
99
100	/* Board type is only set by newer versions of vmelilo/tftplilo */
101	if (!vme_brdtype)
102		vme_brdtype = VME_TYPE_MVME147;
103}
104
105
106/* Using pcc tick timer 1 */
107
108static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
109{
110	m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
111	m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
112	return tick_handler(irq, dev_id);
113}
114
115
116void mvme147_sched_init (irq_handler_t timer_routine)
117{
118	tick_handler = timer_routine;
119	if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, 0, "timer 1", NULL))
120		pr_err("Couldn't register timer interrupt\n");
121
122	/* Init the clock with a value */
123	/* our clock goes off every 6.25us */
124	m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
125	m147_pcc->t1_cntrl = 0x0;	/* clear timer */
126	m147_pcc->t1_cntrl = 0x3;	/* start timer */
127	m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;  /* clear pending ints */
128	m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
129}
130
131/* This is always executed with interrupts disabled.  */
132/* XXX There are race hazards in this code XXX */
133u32 mvme147_gettimeoffset(void)
134{
135	volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
136	unsigned short n;
137
138	n = *cp;
139	while (n != *cp)
140		n = *cp;
141
142	n -= PCC_TIMER_PRELOAD;
143	return ((unsigned long)n * 25 / 4) * 1000;
144}
145
146static int bcd2int (unsigned char b)
147{
148	return ((b>>4)*10 + (b&15));
149}
150
151int mvme147_hwclk(int op, struct rtc_time *t)
152{
153#warning check me!
154	if (!op) {
155		m147_rtc->ctrl = RTC_READ;
156		t->tm_year = bcd2int (m147_rtc->bcd_year);
157		t->tm_mon  = bcd2int (m147_rtc->bcd_mth);
158		t->tm_mday = bcd2int (m147_rtc->bcd_dom);
159		t->tm_hour = bcd2int (m147_rtc->bcd_hr);
160		t->tm_min  = bcd2int (m147_rtc->bcd_min);
161		t->tm_sec  = bcd2int (m147_rtc->bcd_sec);
162		m147_rtc->ctrl = 0;
163	}
164	return 0;
165}
166
167int mvme147_set_clock_mmss (unsigned long nowtime)
168{
169	return 0;
170}
171