| /* |
| * Interrupt handling H8/300H depend. |
| * 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-internal.h> |
| #include <asm/regs306x.h> |
| |
| const int __initconst h8300_saved_vectors[] = { |
| #if defined(CONFIG_GDB_DEBUG) |
| TRAP3_VEC, /* TRAPA #3 is GDB breakpoint */ |
| #endif |
| -1, |
| }; |
| |
| const h8300_vector __initconst h8300_trap_table[] = { |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| system_call, |
| 0, |
| 0, |
| trace_break, |
| }; |
| |
| 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; |
| } |
| } |