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
|
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/page.h>
#include <asm/machdep.h>
#include <asm/apollohw.h>
static irq_handler_t dn_irqs[16];
extern void write_keyb_cmd(u_short length, u_char *cmd);
static char BellOnCommand[] = { 0xFF, 0x21, 0x81 },
BellOffCommand[] = { 0xFF, 0x21, 0x82 };
extern void dn_serial_print (const char *str);
void dn_process_int(int irq, struct pt_regs *fp) {
if(dn_irqs[irq-160].handler) {
dn_irqs[irq-160].handler(irq,dn_irqs[irq-160].dev_id,fp);
}
else {
printk("spurious irq %d occurred\n",irq);
}
*(volatile unsigned char *)(pica)=0x20;
*(volatile unsigned char *)(picb)=0x20;
}
void dn_init_IRQ(void) {
int i;
for(i=0;i<16;i++) {
dn_irqs[i].handler=NULL;
dn_irqs[i].flags=IRQ_FLG_STD;
dn_irqs[i].dev_id=NULL;
dn_irqs[i].devname=NULL;
}
}
int dn_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id) {
if((irq<0) || (irq>15)) {
printk("Trying to request illegal IRQ\n");
return -ENXIO;
}
if(!dn_irqs[irq].handler) {
dn_irqs[irq].handler=handler;
dn_irqs[irq].flags=IRQ_FLG_STD;
dn_irqs[irq].dev_id=dev_id;
dn_irqs[irq].devname=devname;
if(irq<8)
*(volatile unsigned char *)(pica+1)&=~(1<<irq);
else
*(volatile unsigned char *)(picb+1)&=~(1<<(irq-8));
return 0;
}
else {
printk("Trying to request already assigned irq %d\n",irq);
return -ENXIO;
}
}
void dn_free_irq(unsigned int irq, void *dev_id) {
if((irq<0) || (irq>15)) {
printk("Trying to free illegal IRQ\n");
return ;
}
if(irq<8)
*(volatile unsigned char *)(pica+1)|=(1<<irq);
else
*(volatile unsigned char *)(picb+1)|=(1<<(irq-8));
dn_irqs[irq].handler=NULL;
dn_irqs[irq].flags=IRQ_FLG_STD;
dn_irqs[irq].dev_id=NULL;
dn_irqs[irq].devname=NULL;
return ;
}
void dn_enable_irq(unsigned int irq) {
printk("dn enable irq\n");
}
void dn_disable_irq(unsigned int irq) {
printk("dn disable irq\n");
}
int dn_get_irq_list(char *buf) {
printk("dn get irq list\n");
return 0;
}
struct fb_info *dn_dummy_fb_init(long *mem_start) {
printk("fb init\n");
return NULL;
}
static void dn_nosound (unsigned long ignored) {
write_keyb_cmd(sizeof(BellOffCommand),BellOffCommand);
}
void dn_mksound( unsigned int count, unsigned int ticks ) {
static struct timer_list sound_timer = { function: dn_nosound };
del_timer( &sound_timer );
if(count) {
write_keyb_cmd(sizeof(BellOnCommand),BellOnCommand);
if (ticks) {
sound_timer.expires = jiffies + ticks;
add_timer( &sound_timer );
}
}
else
write_keyb_cmd(sizeof(BellOffCommand),BellOffCommand);
}
void dn_dummy_video_setup(char *options,int *ints) {
printk("no video yet\n");
}
|
