83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
/*
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* Interrupt handling H8/300H depend.
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* Yoshinori Sato <ysato@users.sourceforge.jp>
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*
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*/
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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-internal.h>
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#include <asm/regs306x.h>
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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, /* TRAPA #3 is GDB breakpoint */
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#endif
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-1,
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};
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const h8300_vector __initdata h8300_trap_table[] = {
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0, 0, 0, 0, 0, 0, 0, 0,
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system_call,
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0,
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0,
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trace_break,
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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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