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Diffstat (limited to 'arch/sh/boards/renesas/r7780rp/irq.c')
-rw-r--r--arch/sh/boards/renesas/r7780rp/irq.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/arch/sh/boards/renesas/r7780rp/irq.c b/arch/sh/boards/renesas/r7780rp/irq.c
new file mode 100644
index 00000000000..c7b9fe6e640
--- /dev/null
+++ b/arch/sh/boards/renesas/r7780rp/irq.c
@@ -0,0 +1,123 @@
+/*
+ * linux/arch/sh/boards/renesas/r7780rp/irq.c
+ *
+ * Copyright (C) 2000 Kazumoto Kojima
+ *
+ * Renesas Solutions Highlander R7780RP-1 Support.
+ *
+ * Modified for R7780RP-1 by
+ * Atom Create Engineering Co., Ltd. 2002.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/r7780rp/r7780rp.h>
+
+#ifdef CONFIG_SH_R7780MP
+static int mask_pos[] = {12, 11, 9, 14, 15, 8, 13, 6, 5, 4, 3, 2, 0, 0, 1, 0};
+#else
+static int mask_pos[] = {15, 14, 13, 12, 11, 10, 9, 8, 7, 5, 6, 4, 0, 1, 2, 0};
+#endif
+
+static void enable_r7780rp_irq(unsigned int irq);
+static void disable_r7780rp_irq(unsigned int irq);
+
+/* shutdown is same as "disable" */
+#define shutdown_r7780rp_irq disable_r7780rp_irq
+
+static void ack_r7780rp_irq(unsigned int irq);
+static void end_r7780rp_irq(unsigned int irq);
+
+static unsigned int startup_r7780rp_irq(unsigned int irq)
+{
+ enable_r7780rp_irq(irq);
+ return 0; /* never anything pending */
+}
+
+static void disable_r7780rp_irq(unsigned int irq)
+{
+ unsigned long flags;
+ unsigned short val;
+ unsigned short mask = 0xffff ^ (0x0001 << mask_pos[irq]);
+
+ /* Set the priority in IPR to 0 */
+ local_irq_save(flags);
+ val = ctrl_inw(IRLCNTR1);
+ val &= mask;
+ ctrl_outw(val, IRLCNTR1);
+ local_irq_restore(flags);
+}
+
+static void enable_r7780rp_irq(unsigned int irq)
+{
+ unsigned long flags;
+ unsigned short val;
+ unsigned short value = (0x0001 << mask_pos[irq]);
+
+ /* Set priority in IPR back to original value */
+ local_irq_save(flags);
+ val = ctrl_inw(IRLCNTR1);
+ val |= value;
+ ctrl_outw(val, IRLCNTR1);
+ local_irq_restore(flags);
+}
+
+static void ack_r7780rp_irq(unsigned int irq)
+{
+ disable_r7780rp_irq(irq);
+}
+
+static void end_r7780rp_irq(unsigned int irq)
+{
+ if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+ enable_r7780rp_irq(irq);
+}
+
+static struct hw_interrupt_type r7780rp_irq_type = {
+ .typename = "R7780RP-IRQ",
+ .startup = startup_r7780rp_irq,
+ .shutdown = shutdown_r7780rp_irq,
+ .enable = enable_r7780rp_irq,
+ .disable = disable_r7780rp_irq,
+ .ack = ack_r7780rp_irq,
+ .end = end_r7780rp_irq,
+};
+
+static void make_r7780rp_irq(unsigned int irq)
+{
+ disable_irq_nosync(irq);
+ irq_desc[irq].handler = &r7780rp_irq_type;
+ disable_r7780rp_irq(irq);
+}
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_r7780rp_IRQ(void)
+{
+ int i;
+
+ /* IRL0=PCI Slot #A
+ * IRL1=PCI Slot #B
+ * IRL2=PCI Slot #C
+ * IRL3=PCI Slot #D
+ * IRL4=CF Card
+ * IRL5=CF Card Insert
+ * IRL6=M66596
+ * IRL7=SD Card
+ * IRL8=Touch Panel
+ * IRL9=SCI
+ * IRL10=Serial
+ * IRL11=Extention #A
+ * IRL11=Extention #B
+ * IRL12=Debug LAN
+ * IRL13=Push Switch
+ * IRL14=ZiggBee IO
+ */
+
+ for (i=0; i<15; i++)
+ make_r7780rp_irq(i);
+}