1 files changed, 193 insertions, 0 deletions

diff --git a/arch/sh/boards/se/7343/irq.c b/arch/sh/boards/se/7343/irq.c
new file mode 100644
index 00000000000..b41e3d4ea37
--- /dev/null
+++ b/arch/sh/boards/se/7343/irq.c
@@ -0,0 +1,193 @@
+/*
+ * arch/sh/boards/se/7343/irq.c
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/mach/se7343.h>
+
+static void
+disable_intreq_irq(unsigned int irq)
+{
+        int bit = irq - OFFCHIP_IRQ_BASE;
+        u16 val;
+
+        val = ctrl_inw(PA_CPLD_IMSK);
+        val |= 1 << bit;
+        ctrl_outw(val, PA_CPLD_IMSK);
+}
+
+static void
+enable_intreq_irq(unsigned int irq)
+{
+        int bit = irq - OFFCHIP_IRQ_BASE;
+        u16 val;
+
+        val = ctrl_inw(PA_CPLD_IMSK);
+        val &= ~(1 << bit);
+        ctrl_outw(val, PA_CPLD_IMSK);
+}
+
+static void
+mask_and_ack_intreq_irq(unsigned int irq)
+{
+        disable_intreq_irq(irq);
+}
+
+static unsigned int
+startup_intreq_irq(unsigned int irq)
+{
+        enable_intreq_irq(irq);
+        return 0;
+}
+
+static void
+shutdown_intreq_irq(unsigned int irq)
+{
+        disable_intreq_irq(irq);
+}
+
+static void
+end_intreq_irq(unsigned int irq)
+{
+        if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+                enable_intreq_irq(irq);
+}
+
+static struct hw_interrupt_type intreq_irq_type = {
+        .typename = "FPGA-IRQ",
+        .startup = startup_intreq_irq,
+        .shutdown = shutdown_intreq_irq,
+        .enable = enable_intreq_irq,
+        .disable = disable_intreq_irq,
+        .ack = mask_and_ack_intreq_irq,
+        .end = end_intreq_irq
+};
+
+static void
+make_intreq_irq(unsigned int irq)
+{
+        disable_irq_nosync(irq);
+        irq_desc[irq].handler = &intreq_irq_type;
+        disable_intreq_irq(irq);
+}
+
+int
+shmse_irq_demux(int irq)
+{
+        int bit;
+        volatile u16 val;
+
+        if (irq == IRQ5_IRQ) {
+                /* Read status Register */
+                val = ctrl_inw(PA_CPLD_ST);
+                bit = ffs(val);
+                if (bit != 0)
+                        return OFFCHIP_IRQ_BASE + bit - 1;
+        }
+        return irq;
+}
+
+/* IRQ5 is multiplexed between the following sources:
+ * 1. PC Card socket
+ * 2. Extension slot
+ * 3. USB Controller
+ * 4. Serial Controller
+ *
+ * We configure IRQ5 as a cascade IRQ.
+ */
+static struct irqaction irq5 = { no_action, 0, CPU_MASK_NONE, "IRQ5-cascade",
+                                NULL, NULL};
+
+/*
+ * Initialize IRQ setting
+ */
+void __init
+init_7343se_IRQ(void)
+{
+        /* Setup Multiplexed interrupts */
+        ctrl_outw(8, PA_CPLD_MODESET);  /* Set all CPLD interrupts to active
+                                         * low.
+                                         */
+        /* Mask all CPLD controller interrupts */
+        ctrl_outw(0x0fff, PA_CPLD_IMSK);
+
+        /* PC Card interrupts */
+        make_intreq_irq(PC_IRQ0);
+        make_intreq_irq(PC_IRQ1);
+        make_intreq_irq(PC_IRQ2);
+        make_intreq_irq(PC_IRQ3);
+
+        /* Extension Slot Interrupts */
+        make_intreq_irq(EXT_IRQ0);
+        make_intreq_irq(EXT_IRQ1);
+        make_intreq_irq(EXT_IRQ2);
+        make_intreq_irq(EXT_IRQ3);
+
+        /* USB Controller interrupts */
+        make_intreq_irq(USB_IRQ0);
+        make_intreq_irq(USB_IRQ1);
+
+        /* Serial Controller interrupts */
+        make_intreq_irq(UART_IRQ0);
+        make_intreq_irq(UART_IRQ1);
+
+        /* Setup all external interrupts to be active low */
+        ctrl_outw(0xaaaa, INTC_ICR1);
+
+        make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR+2, IRQ5_IPR_POS, IRQ5_PRIORITY);
+        setup_irq(IRQ5_IRQ, &irq5);
+        /* Set port control to use IRQ5 */
+        *(u16 *)0xA4050108 &= ~0xc;
+
+        make_ipr_irq(SIOF0_IRQ, SIOF0_IPR_ADDR, SIOF0_IPR_POS, SIOF0_PRIORITY);
+        make_ipr_irq(VPU_IRQ, VPU_IPR_ADDR, VPU_IPR_POS, 8);
+
+        ctrl_outb(0x0f, INTC_IMCR5);    /* enable SCIF IRQ */
+
+        make_ipr_irq(DMTE0_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
+        make_ipr_irq(DMTE1_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
+        make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
+        make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
+        make_ipr_irq(DMTE4_IRQ, DMA2_IPR_ADDR, DMA2_IPR_POS, DMA2_PRIORITY);
+        make_ipr_irq(DMTE5_IRQ, DMA2_IPR_ADDR, DMA2_IPR_POS, DMA2_PRIORITY);
+
+        /* I2C block */
+        make_ipr_irq(IIC0_ALI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS, IIC0_PRIORITY);
+        make_ipr_irq(IIC0_TACKI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS,
+                     IIC0_PRIORITY);
+        make_ipr_irq(IIC0_WAITI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS,
+                     IIC0_PRIORITY);
+        make_ipr_irq(IIC0_DTEI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS, IIC0_PRIORITY);
+
+        make_ipr_irq(IIC1_ALI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS, IIC1_PRIORITY);
+        make_ipr_irq(IIC1_TACKI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS,
+                     IIC1_PRIORITY);
+        make_ipr_irq(IIC1_WAITI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS,
+                     IIC1_PRIORITY);
+        make_ipr_irq(IIC1_DTEI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS, IIC1_PRIORITY);
+
+        /* SIOF */
+        make_ipr_irq(SIOF0_IRQ, SIOF0_IPR_ADDR, SIOF0_IPR_POS, SIOF0_PRIORITY);
+
+        /* SIU */
+        make_ipr_irq(SIU_IRQ, SIU_IPR_ADDR, SIU_IPR_POS, SIU_PRIORITY);
+
+        /* VIO interrupt */
+        make_ipr_irq(CEU_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY);
+        make_ipr_irq(BEU_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY);
+        make_ipr_irq(VEU_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY);
+
+        /*MFI interrupt*/
+
+        make_ipr_irq(MFI_IRQ, MFI_IPR_ADDR, MFI_IPR_POS, MFI_PRIORITY);
+
+        /* LCD controller */
+        make_ipr_irq(LCDC_IRQ, LCDC_IPR_ADDR, LCDC_IPR_POS, LCDC_PRIORITY);
+        ctrl_outw(0x2000, PA_MRSHPC + 0x0c);    /* mrshpc irq enable */
+}