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
|
/*
* linux/arch/h8300/platform/h8300h/ints_h8300h.c
* Interrupt handling CPU variants
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
*
*/
#include <linux/init.h>
#include <linux/errno.h>
#include <asm/ptrace.h>
#include <asm/traps.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/regs306x.h>
/* saved vector list */
const int __initdata h8300_saved_vectors[]={
#if defined(CONFIG_GDB_DEBUG)
TRAP3_VEC,
#endif
-1
};
/* trap entry table */
const unsigned long __initdata h8300_trap_table[NR_TRAPS]={
0,0,0,0,0,0,0,0,
(unsigned long)system_call, /* TRAPA #0 */
0,0,
(unsigned long)trace_break, /* TRAPA #3 */
};
int h8300_enable_irq_pin(unsigned int irq)
{
int bitmask;
if (irq < EXT_IRQ0 || irq > EXT_IRQ5)
return 0;
/* initialize IRQ pin */
bitmask = 1 << (irq - EXT_IRQ0);
switch(irq) {
case EXT_IRQ0:
case EXT_IRQ1:
case EXT_IRQ2:
case EXT_IRQ3:
if (H8300_GPIO_RESERVE(H8300_GPIO_P8, bitmask) == 0)
return -EBUSY;
H8300_GPIO_DDR(H8300_GPIO_P8, bitmask, H8300_GPIO_INPUT);
break;
case EXT_IRQ4:
case EXT_IRQ5:
if (H8300_GPIO_RESERVE(H8300_GPIO_P9, bitmask) == 0)
return -EBUSY;
H8300_GPIO_DDR(H8300_GPIO_P9, bitmask, H8300_GPIO_INPUT);
break;
}
return 0;
}
void h8300_disable_irq_pin(unsigned int irq)
{
int bitmask;
if (irq < EXT_IRQ0 || irq > EXT_IRQ5)
return;
/* disable interrupt & release IRQ pin */
bitmask = 1 << (irq - EXT_IRQ0);
switch(irq) {
case EXT_IRQ0:
case EXT_IRQ1:
case EXT_IRQ2:
case EXT_IRQ3:
*(volatile unsigned char *)IER &= ~bitmask;
H8300_GPIO_FREE(H8300_GPIO_P8, bitmask);
break ;
case EXT_IRQ4:
case EXT_IRQ5:
*(volatile unsigned char *)IER &= ~bitmask;
H8300_GPIO_FREE(H8300_GPIO_P9, bitmask);
break;
}
}
|
