1 files changed, 162 insertions, 0 deletions

diff --git a/arch/arm/mach-rpc/irq.c b/arch/arm/mach-rpc/irq.c
new file mode 100644
index 000000000000..56b2716f8cf5
--- /dev/null
+++ b/arch/arm/mach-rpc/irq.c
@@ -0,0 +1,162 @@
+#include <linux/init.h>
+#include <linux/list.h>
+
+#include <asm/mach/irq.h>
+#include <asm/hardware/iomd.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+static void iomd_ack_irq_a(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << irq;
+        val = iomd_readb(IOMD_IRQMASKA);
+        iomd_writeb(val & ~mask, IOMD_IRQMASKA);
+        iomd_writeb(mask, IOMD_IRQCLRA);
+}
+
+static void iomd_mask_irq_a(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << irq;
+        val = iomd_readb(IOMD_IRQMASKA);
+        iomd_writeb(val & ~mask, IOMD_IRQMASKA);
+}
+
+static void iomd_unmask_irq_a(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << irq;
+        val = iomd_readb(IOMD_IRQMASKA);
+        iomd_writeb(val | mask, IOMD_IRQMASKA);
+}
+
+static struct irqchip iomd_a_chip = {
+        .ack    = iomd_ack_irq_a,
+        .mask   = iomd_mask_irq_a,
+        .unmask = iomd_unmask_irq_a,
+};
+
+static void iomd_mask_irq_b(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << (irq & 7);
+        val = iomd_readb(IOMD_IRQMASKB);
+        iomd_writeb(val & ~mask, IOMD_IRQMASKB);
+}
+
+static void iomd_unmask_irq_b(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << (irq & 7);
+        val = iomd_readb(IOMD_IRQMASKB);
+        iomd_writeb(val | mask, IOMD_IRQMASKB);
+}
+
+static struct irqchip iomd_b_chip = {
+        .ack    = iomd_mask_irq_b,
+        .mask   = iomd_mask_irq_b,
+        .unmask = iomd_unmask_irq_b,
+};
+
+static void iomd_mask_irq_dma(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << (irq & 7);
+        val = iomd_readb(IOMD_DMAMASK);
+        iomd_writeb(val & ~mask, IOMD_DMAMASK);
+}
+
+static void iomd_unmask_irq_dma(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << (irq & 7);
+        val = iomd_readb(IOMD_DMAMASK);
+        iomd_writeb(val | mask, IOMD_DMAMASK);
+}
+
+static struct irqchip iomd_dma_chip = {
+        .ack    = iomd_mask_irq_dma,
+        .mask   = iomd_mask_irq_dma,
+        .unmask = iomd_unmask_irq_dma,
+};
+
+static void iomd_mask_irq_fiq(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << (irq & 7);
+        val = iomd_readb(IOMD_FIQMASK);
+        iomd_writeb(val & ~mask, IOMD_FIQMASK);
+}
+
+static void iomd_unmask_irq_fiq(unsigned int irq)
+{
+        unsigned int val, mask;
+
+        mask = 1 << (irq & 7);
+        val = iomd_readb(IOMD_FIQMASK);
+        iomd_writeb(val | mask, IOMD_FIQMASK);
+}
+
+static struct irqchip iomd_fiq_chip = {
+        .ack    = iomd_mask_irq_fiq,
+        .mask   = iomd_mask_irq_fiq,
+        .unmask = iomd_unmask_irq_fiq,
+};
+
+void __init rpc_init_irq(void)
+{
+        unsigned int irq, flags;
+
+        iomd_writeb(0, IOMD_IRQMASKA);
+        iomd_writeb(0, IOMD_IRQMASKB);
+        iomd_writeb(0, IOMD_FIQMASK);
+        iomd_writeb(0, IOMD_DMAMASK);
+
+        for (irq = 0; irq < NR_IRQS; irq++) {
+                flags = IRQF_VALID;
+
+                if (irq <= 6 || (irq >= 9 && irq <= 15))
+                        flags |= IRQF_PROBE;
+
+                if (irq == 21 || (irq >= 16 && irq <= 19) ||
+                    irq == IRQ_KEYBOARDTX)
+                        flags |= IRQF_NOAUTOEN;
+
+                switch (irq) {
+                case 0 ... 7:
+                        set_irq_chip(irq, &iomd_a_chip);
+                        set_irq_handler(irq, do_level_IRQ);
+                        set_irq_flags(irq, flags);
+                        break;
+
+                case 8 ... 15:
+                        set_irq_chip(irq, &iomd_b_chip);
+                        set_irq_handler(irq, do_level_IRQ);
+                        set_irq_flags(irq, flags);
+                        break;
+
+                case 16 ... 21:
+                        set_irq_chip(irq, &iomd_dma_chip);
+                        set_irq_handler(irq, do_level_IRQ);
+                        set_irq_flags(irq, flags);
+                        break;
+
+                case 64 ... 71:
+                        set_irq_chip(irq, &iomd_fiq_chip);
+                        set_irq_flags(irq, IRQF_VALID);
+                        break;
+                }
+        }
+
+        init_FIQ();
+}
+