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
|
/*
* 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/clocksource.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/bootinfo-vme.h>
#include <asm/byteorder.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/mvme147hw.h>
static void mvme147_get_model(char *model);
extern void mvme147_sched_init(irq_handler_t handler);
extern int mvme147_hwclk (int, struct rtc_time *);
extern void mvme147_reset (void);
static int bcd2int (unsigned char b);
int __init mvme147_parse_bootinfo(const struct bi_record *bi)
{
uint16_t tag = be16_to_cpu(bi->tag);
if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
return 0;
else
return 1;
}
void mvme147_reset(void)
{
pr_info("\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");
}
/*
* This function is called during kernel startup to initialize
* the mvme147 IRQ handling routines.
*/
void __init mvme147_init_IRQ(void)
{
m68k_setup_user_interrupt(VEC_USER, 192);
}
void __init config_mvme147(void)
{
mach_max_dma_address = 0x01000000;
mach_sched_init = mvme147_sched_init;
mach_init_IRQ = mvme147_init_IRQ;
mach_hwclk = mvme147_hwclk;
mach_reset = mvme147_reset;
mach_get_model = mvme147_get_model;
/* Board type is only set by newer versions of vmelilo/tftplilo */
if (!vme_brdtype)
vme_brdtype = VME_TYPE_MVME147;
}
static u64 mvme147_read_clk(struct clocksource *cs);
static struct clocksource mvme147_clk = {
.name = "pcc",
.rating = 250,
.read = mvme147_read_clk,
.mask = CLOCKSOURCE_MASK(32),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
static u32 clk_total;
#define PCC_TIMER_CLOCK_FREQ 160000
#define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ)
#define PCC_TIMER_PRELOAD (0x10000 - PCC_TIMER_CYCLES)
/* Using pcc tick timer 1 */
static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
{
irq_handler_t timer_routine = dev_id;
unsigned long flags;
local_irq_save(flags);
m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
PCC_TIMER_TIC_EN;
m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
PCC_LEVEL_TIMER1;
clk_total += PCC_TIMER_CYCLES;
timer_routine(0, NULL);
local_irq_restore(flags);
return IRQ_HANDLED;
}
void mvme147_sched_init (irq_handler_t timer_routine)
{
if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, IRQF_TIMER,
"timer 1", timer_routine))
pr_err("Couldn't register timer interrupt\n");
/* Init the clock with a value */
/* The clock counter increments until 0xFFFF then reloads */
m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
PCC_TIMER_TIC_EN;
m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
PCC_LEVEL_TIMER1;
clocksource_register_hz(&mvme147_clk, PCC_TIMER_CLOCK_FREQ);
}
static u64 mvme147_read_clk(struct clocksource *cs)
{
unsigned long flags;
u8 overflow, tmp;
u16 count;
u32 ticks;
local_irq_save(flags);
tmp = m147_pcc->t1_cntrl >> 4;
count = m147_pcc->t1_count;
overflow = m147_pcc->t1_cntrl >> 4;
if (overflow != tmp)
count = m147_pcc->t1_count;
count -= PCC_TIMER_PRELOAD;
ticks = count + overflow * PCC_TIMER_CYCLES;
ticks += clk_total;
local_irq_restore(flags);
return ticks;
}
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) - 1;
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;
if (t->tm_year < 70)
t->tm_year += 100;
}
return 0;
}
|
