This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sh / boards / se / 7343 / irq.c

diff --git a/arch/sh/boards/se/7343/irq.c b/arch/sh/boards/se/7343/irq.c
new file mode 100644 (file)
index 0000000..360153e
--- /dev/null
+++ b/arch/sh/boards/se/7343/irq.c
@@ -0,0 +1,199 @@
+/*
+ * arch/sh/boards/se/7343/irq.c
+ *
+ */
+#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].chip = &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};
+
+static struct ipr_data se7343_irq5_ipr_map[] = {
+       { IRQ5_IRQ, IRQ5_IPR_ADDR+2, IRQ5_IPR_POS, IRQ5_PRIORITY },
+};
+static struct ipr_data se7343_siof0_vpu_ipr_map[] = {
+       { SIOF0_IRQ, SIOF0_IPR_ADDR, SIOF0_IPR_POS, SIOF0_PRIORITY },
+       { VPU_IRQ, VPU_IPR_ADDR, VPU_IPR_POS, 8 },
+};
+static struct ipr_data se7343_other_ipr_map[] = {
+       { DMTE0_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY },
+       { DMTE1_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY },
+       { DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY },
+       { DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY },
+       { DMTE4_IRQ, DMA2_IPR_ADDR, DMA2_IPR_POS, DMA2_PRIORITY },
+       { DMTE5_IRQ, DMA2_IPR_ADDR, DMA2_IPR_POS, DMA2_PRIORITY },
+
+       /* I2C block */
+       { IIC0_ALI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS, IIC0_PRIORITY },
+       { IIC0_TACKI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS, IIC0_PRIORITY },
+       { IIC0_WAITI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS, IIC0_PRIORITY },
+       { IIC0_DTEI_IRQ, IIC0_IPR_ADDR, IIC0_IPR_POS, IIC0_PRIORITY },
+
+       { IIC1_ALI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS, IIC1_PRIORITY },
+       { IIC1_TACKI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS, IIC1_PRIORITY },
+       { IIC1_WAITI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS, IIC1_PRIORITY },
+       { IIC1_DTEI_IRQ, IIC1_IPR_ADDR, IIC1_IPR_POS, IIC1_PRIORITY },
+
+       /* SIOF */
+       { SIOF0_IRQ, SIOF0_IPR_ADDR, SIOF0_IPR_POS, SIOF0_PRIORITY },
+
+       /* SIU */
+       { SIU_IRQ, SIU_IPR_ADDR, SIU_IPR_POS, SIU_PRIORITY },
+
+       /* VIO interrupt */
+       { CEU_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY },
+       { BEU_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY },
+       { VEU_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY },
+
+       /*MFI interrupt*/
+
+       { MFI_IRQ, MFI_IPR_ADDR, MFI_IPR_POS, MFI_PRIORITY },
+
+       /* LCD controller */
+       { LCDC_IRQ, LCDC_IPR_ADDR, LCDC_IPR_POS, LCDC_PRIORITY },
+};
+
+/*
+ * 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(se7343_irq5_ipr_map, ARRAY_SIZE(se7343_irq5_ipr_map));
+
+       setup_irq(IRQ5_IRQ, &irq5);
+       /* Set port control to use IRQ5 */
+       *(u16 *)0xA4050108 &= ~0xc;
+
+       make_ipr_irq(se7343_siof0_vpu_ipr_map, ARRAY_SIZE(se7343_siof0_vpu_ipr_map));
+
+       ctrl_outb(0x0f, INTC_IMCR5);    /* enable SCIF IRQ */
+
+       make_ipr_irq(se7343_other_ipr_map, ARRAY_SIZE(se7343_other_ipr_map));
+
+       ctrl_outw(0x2000, PA_MRSHPC + 0x0c);    /* mrshpc irq enable */
+}