106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
|
|
* linux/arch/h8300/platform/h8s/ints_h8s.c
|
|
* Interrupt handling CPU variants
|
|
*
|
|
* Yoshinori Sato <ysato@users.sourceforge.jp>
|
|
*
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <asm/traps.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/regs267x.h>
|
|
|
|
/* saved vector list */
|
|
const int __initdata h8300_saved_vectors[]={
|
|
#if defined(CONFIG_GDB_DEBUG)
|
|
TRACE_VEC,
|
|
TRAP3_VEC,
|
|
#endif
|
|
-1
|
|
};
|
|
|
|
/* trap entry table */
|
|
const unsigned long __initdata h8300_trap_table[NR_TRAPS]={
|
|
0,0,0,0,0,
|
|
(unsigned long)trace_break, /* TRACE */
|
|
0,0,
|
|
(unsigned long)system_call, /* TRAPA #0 */
|
|
0,0,0,0,0,0,0
|
|
};
|
|
|
|
/* IRQ pin assignment */
|
|
struct irq_pins {
|
|
unsigned char port_no;
|
|
unsigned char bit_no;
|
|
} __attribute__((aligned(1),packed));
|
|
/* ISTR = 0 */
|
|
static const struct irq_pins irq_assign_table0[16]={
|
|
{H8300_GPIO_P5,H8300_GPIO_B0},{H8300_GPIO_P5,H8300_GPIO_B1},
|
|
{H8300_GPIO_P5,H8300_GPIO_B2},{H8300_GPIO_P5,H8300_GPIO_B3},
|
|
{H8300_GPIO_P5,H8300_GPIO_B4},{H8300_GPIO_P5,H8300_GPIO_B5},
|
|
{H8300_GPIO_P5,H8300_GPIO_B6},{H8300_GPIO_P5,H8300_GPIO_B7},
|
|
{H8300_GPIO_P6,H8300_GPIO_B0},{H8300_GPIO_P6,H8300_GPIO_B1},
|
|
{H8300_GPIO_P6,H8300_GPIO_B2},{H8300_GPIO_P6,H8300_GPIO_B3},
|
|
{H8300_GPIO_P6,H8300_GPIO_B4},{H8300_GPIO_P6,H8300_GPIO_B5},
|
|
{H8300_GPIO_PF,H8300_GPIO_B1},{H8300_GPIO_PF,H8300_GPIO_B2},
|
|
};
|
|
/* ISTR = 1 */
|
|
static const struct irq_pins irq_assign_table1[16]={
|
|
{H8300_GPIO_P8,H8300_GPIO_B0},{H8300_GPIO_P8,H8300_GPIO_B1},
|
|
{H8300_GPIO_P8,H8300_GPIO_B2},{H8300_GPIO_P8,H8300_GPIO_B3},
|
|
{H8300_GPIO_P8,H8300_GPIO_B4},{H8300_GPIO_P8,H8300_GPIO_B5},
|
|
{H8300_GPIO_PH,H8300_GPIO_B2},{H8300_GPIO_PH,H8300_GPIO_B3},
|
|
{H8300_GPIO_P2,H8300_GPIO_B0},{H8300_GPIO_P2,H8300_GPIO_B1},
|
|
{H8300_GPIO_P2,H8300_GPIO_B2},{H8300_GPIO_P2,H8300_GPIO_B3},
|
|
{H8300_GPIO_P2,H8300_GPIO_B4},{H8300_GPIO_P2,H8300_GPIO_B5},
|
|
{H8300_GPIO_P2,H8300_GPIO_B6},{H8300_GPIO_P2,H8300_GPIO_B7},
|
|
};
|
|
|
|
/* IRQ to GPIO pinno transrate */
|
|
#define IRQ_GPIO_MAP(irqbit,irq,port,bit) \
|
|
do { \
|
|
if (*(volatile unsigned short *)ITSR & irqbit) { \
|
|
port = irq_assign_table1[irq - EXT_IRQ0].port_no; \
|
|
bit = irq_assign_table1[irq - EXT_IRQ0].bit_no; \
|
|
} else { \
|
|
port = irq_assign_table0[irq - EXT_IRQ0].port_no; \
|
|
bit = irq_assign_table0[irq - EXT_IRQ0].bit_no; \
|
|
} \
|
|
} while(0)
|
|
|
|
int h8300_enable_irq_pin(unsigned int irq)
|
|
{
|
|
if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15) {
|
|
unsigned short ptn = 1 << (irq - EXT_IRQ0);
|
|
unsigned int port_no,bit_no;
|
|
IRQ_GPIO_MAP(ptn, irq, port_no, bit_no);
|
|
if (H8300_GPIO_RESERVE(port_no, bit_no) == 0)
|
|
return -EBUSY; /* pin already use */
|
|
H8300_GPIO_DDR(port_no, bit_no, H8300_GPIO_INPUT);
|
|
*(volatile unsigned short *)ISR &= ~ptn; /* ISR clear */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void h8300_disable_irq_pin(unsigned int irq)
|
|
{
|
|
if (irq >= EXT_IRQ0 && irq <= EXT_IRQ15) {
|
|
/* disable interrupt & release IRQ pin */
|
|
unsigned short ptn = 1 << (irq - EXT_IRQ0);
|
|
unsigned short port_no,bit_no;
|
|
*(volatile unsigned short *)ISR &= ~ptn;
|
|
*(volatile unsigned short *)IER &= ~ptn;
|
|
IRQ_GPIO_MAP(ptn, irq, port_no, bit_no);
|
|
H8300_GPIO_FREE(port_no, bit_no);
|
|
}
|
|
}
|