sh: Add support for R7780RP and R7780MP boards.

This adds support for the Renesas SH7780 development boards,
R7780RP and R7780MP.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

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 000000000000..c7b9fe6e640d
--- /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);
+}