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