1 files changed, 82 insertions, 0 deletions

diff --git a/arch/h8300/platform/h8300h/irq.c b/arch/h8300/platform/h8300h/irq.c
new file mode 100644
index 00000000000..e977345105d
--- /dev/null
+++ b/arch/h8300/platform/h8300h/irq.c
@@ -0,0 +1,82 @@
+/*
+ * 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.h>
+#include <asm/regs306x.h>
+
+const int __initdata h8300_saved_vectors[] = {
+#if defined(CONFIG_GDB_DEBUG)
+        TRAP3_VEC,      /* TRAPA #3 is GDB breakpoint */
+#endif
+        -1,
+};
+
+const h8300_vector __initdata 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;
+        }
+}