87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
|
/*
|
||
|
|
* linux/arch/h8300/platform/h8300h/ints_h8300h.c
|
||
|
|
* Interrupt handling CPU variants
|
||
|
|
*
|
||
|
|
* Yoshinori Sato <ysato@users.sourceforge.jp>
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/config.h>
|
||
|
|
#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;
|
||
|
|
}
|
||
|
|
}
|