1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* arch/m68k/mvme147/config.c
*
* Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
* Cloned from Richard Hirst [richard@sleepie.demon.co.uk]
*
* Based on:
*
* Copyright (C) 1993 Hamish Macdonald
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file README.legal in the main directory of this archive
* for more details.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/genhd.h>
#include <linux/rtc.h>
#include <linux/interrupt.h>
#include <asm/bootinfo.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/rtc.h>
#include <asm/machdep.h>
#include <asm/mvme147hw.h>
static void mvme147_get_model(char *model);
static int mvme147_get_hardware_list(char *buffer);
extern void mvme147_sched_init(irq_handler_t handler);
extern unsigned long mvme147_gettimeoffset (void);
extern int mvme147_hwclk (int, struct rtc_time *);
extern int mvme147_set_clock_mmss (unsigned long);
extern void mvme147_reset (void);
extern void mvme147_waitbut(void);
static int bcd2int (unsigned char b);
/* Save tick handler routine pointer, will point to do_timer() in
* kernel/sched.c, called via mvme147_process_int() */
irq_handler_t tick_handler;
int mvme147_parse_bootinfo(const struct bi_record *bi)
{
if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
return 0;
else
return 1;
}
void mvme147_reset(void)
{
printk ("\r\n\nCalled mvme147_reset\r\n");
m147_pcc->watchdog = 0x0a; /* Clear timer */
m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
while (1)
;
}
static void mvme147_get_model(char *model)
{
sprintf(model, "Motorola MVME147");
}
static int mvme147_get_hardware_list(char *buffer)
{
*buffer = '\0';
return 0;
}
/*
* This function is called during kernel startup to initialize
* the mvme147 IRQ handling routines.
*/
void mvme147_init_IRQ(void)
{
m68k_setup_user_interrupt(VEC_USER, 192, NULL);
}
void __init config_mvme147(void)
{
mach_max_dma_address = 0x01000000;
mach_sched_init = mvme147_sched_init;
mach_init_IRQ = mvme147_init_IRQ;
mach_gettimeoffset = mvme147_gettimeoffset;
mach_hwclk = mvme147_hwclk;
mach_set_clock_mmss = mvme147_set_clock_mmss;
mach_reset = mvme147_reset;
mach_get_model = mvme147_get_model;
mach_get_hardware_list = mvme147_get_hardware_list;
/* Board type is only set by newer versions of vmelilo/tftplilo */
if (!vme_brdtype)
vme_brdtype = VME_TYPE_MVME147;
}
/* Using pcc tick timer 1 */
static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
{
m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
return tick_handler(irq, dev_id);
}
void mvme147_sched_init (irq_handler_t timer_routine)
{
tick_handler = timer_routine;
request_irq (PCC_IRQ_TIMER1, mvme147_timer_int,
IRQ_FLG_REPLACE, "timer 1", NULL);
/* Init the clock with a value */
/* our clock goes off every 6.25us */
m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
m147_pcc->t1_cntrl = 0x0; /* clear timer */
m147_pcc->t1_cntrl = 0x3; /* start timer */
m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
}
/* This is always executed with interrupts disabled. */
/* XXX There are race hazards in this code XXX */
unsigned long mvme147_gettimeoffset (void)
{
volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
unsigned short n;
n = *cp;
while (n != *cp)
n = *cp;
n -= PCC_TIMER_PRELOAD;
return (unsigned long)n * 25 / 4;
}
static int bcd2int (unsigned char b)
{
return ((b>>4)*10 + (b&15));
}
int mvme147_hwclk(int op, struct rtc_time *t)
{
#warning check me!
if (!op) {
m147_rtc->ctrl = RTC_READ;
t->tm_year = bcd2int (m147_rtc->bcd_year);
t->tm_mon = bcd2int (m147_rtc->bcd_mth);
t->tm_mday = bcd2int (m147_rtc->bcd_dom);
t->tm_hour = bcd2int (m147_rtc->bcd_hr);
t->tm_min = bcd2int (m147_rtc->bcd_min);
t->tm_sec = bcd2int (m147_rtc->bcd_sec);
m147_rtc->ctrl = 0;
}
return 0;
}
int mvme147_set_clock_mmss (unsigned long nowtime)
{
return 0;
}
/*------------------- Serial console stuff ------------------------*/
static void scc_delay (void)
{
int n;
volatile int trash;
for (n = 0; n < 20; n++)
trash = n;
}
static void scc_write (char ch)
{
volatile char *p = (volatile char *)M147_SCC_A_ADDR;
do {
scc_delay();
}
while (!(*p & 4));
scc_delay();
*p = 8;
scc_delay();
*p = ch;
}
void m147_scc_write (struct console *co, const char *str, unsigned count)
{
unsigned long flags;
local_irq_save(flags);
while (count--)
{
if (*str == '\n')
scc_write ('\r');
scc_write (*str++);
}
local_irq_restore(flags);
}
void mvme147_init_console_port (struct console *co, int cflag)
{
co->write = m147_scc_write;
}
|
