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

[linux-2.6.git] / arch / sh / boards / se / 7206 / irq.c

diff --git a/arch/sh/boards/se/7206/irq.c b/arch/sh/boards/se/7206/irq.c
new file mode 100644 (file)
index 0000000..27da884
--- /dev/null
+++ b/arch/sh/boards/se/7206/irq.c
@@ -0,0 +1,147 @@
+/*
+ * linux/arch/sh/boards/se/7206/irq.c
+ *
+ * Copyright (C) 2005,2006 Yoshinori Sato
+ *
+ * Hitachi SolutionEngine Support.
+ *
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <asm/se7206.h>
+
+#define INTSTS0 0x31800000
+#define INTSTS1 0x31800002
+#define INTMSK0 0x31800004
+#define INTMSK1 0x31800006
+#define INTSEL  0x31800008
+
+#define IRQ0_IRQ 64
+#define IRQ1_IRQ 65
+#define IRQ3_IRQ 67
+
+#define INTC_IPR01 0xfffe0818
+#define INTC_ICR1  0xfffe0802
+
+static void disable_se7206_irq(unsigned int irq)
+{
+       unsigned short val;
+       unsigned short mask = 0xffff ^ (0x0f << 4 * (3 - (IRQ0_IRQ - irq)));
+       unsigned short msk0,msk1;
+
+       /* Set the priority in IPR to 0 */
+       val = ctrl_inw(INTC_IPR01);
+       val &= mask;
+       ctrl_outw(val, INTC_IPR01);
+       /* FPGA mask set */
+       msk0 = ctrl_inw(INTMSK0);
+       msk1 = ctrl_inw(INTMSK1);
+
+       switch (irq) {
+       case IRQ0_IRQ:
+               msk0 |= 0x0010;
+               break;
+       case IRQ1_IRQ:
+               msk0 |= 0x000f;
+               break;
+       case IRQ3_IRQ:
+               msk0 |= 0x0f00;
+               msk1 |= 0x00ff;
+               break;
+       }
+       ctrl_outw(msk0, INTMSK0);
+       ctrl_outw(msk1, INTMSK1);
+}
+
+static void enable_se7206_irq(unsigned int irq)
+{
+       unsigned short val;
+       unsigned short value = (0x0001 << 4 * (3 - (IRQ0_IRQ - irq)));
+       unsigned short msk0,msk1;
+
+       /* Set priority in IPR back to original value */
+       val = ctrl_inw(INTC_IPR01);
+       val |= value;
+       ctrl_outw(val, INTC_IPR01);
+
+       /* FPGA mask reset */
+       msk0 = ctrl_inw(INTMSK0);
+       msk1 = ctrl_inw(INTMSK1);
+
+       switch (irq) {
+       case IRQ0_IRQ:
+               msk0 &= ~0x0010;
+               break;
+       case IRQ1_IRQ:
+               msk0 &= ~0x000f;
+               break;
+       case IRQ3_IRQ:
+               msk0 &= ~0x0f00;
+               msk1 &= ~0x00ff;
+               break;
+       }
+       ctrl_outw(msk0, INTMSK0);
+       ctrl_outw(msk1, INTMSK1);
+}
+
+static void eoi_se7206_irq(unsigned int irq)
+{
+       unsigned short sts0,sts1;
+
+       if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+               enable_se7206_irq(irq);
+       /* FPGA isr clear */
+       sts0 = ctrl_inw(INTSTS0);
+       sts1 = ctrl_inw(INTSTS1);
+
+       switch (irq) {
+       case IRQ0_IRQ:
+               sts0 &= ~0x0010;
+               break;
+       case IRQ1_IRQ:
+               sts0 &= ~0x000f;
+               break;
+       case IRQ3_IRQ:
+               sts0 &= ~0x0f00;
+               sts1 &= ~0x00ff;
+               break;
+       }
+       ctrl_outw(sts0, INTSTS0);
+       ctrl_outw(sts1, INTSTS1);
+}
+
+static struct irq_chip se7206_irq_chip __read_mostly = {
+       .name           = "SE7206-FPGA",
+       .mask           = disable_se7206_irq,
+       .unmask         = enable_se7206_irq,
+       .mask_ack       = disable_se7206_irq,
+       .eoi            = eoi_se7206_irq,
+};
+
+static void make_se7206_irq(unsigned int irq)
+{
+       disable_irq_nosync(irq);
+       set_irq_chip_and_handler_name(irq, &se7206_irq_chip,
+                                     handle_level_irq, "level");
+       disable_se7206_irq(irq);
+}
+
+/*
+ * Initialize IRQ setting
+ */
+void __init init_se7206_IRQ(void)
+{
+       make_se7206_irq(IRQ0_IRQ); /* SMC91C111 */
+       make_se7206_irq(IRQ1_IRQ); /* ATA */
+       make_se7206_irq(IRQ3_IRQ); /* SLOT / PCM */
+       ctrl_outw(inw(INTC_ICR1) | 0x000b ,INTC_ICR1 ) ; /* ICR1 */
+
+       /* FPGA System register setup*/
+       ctrl_outw(0x0000,INTSTS0); /* Clear INTSTS0 */
+       ctrl_outw(0x0000,INTSTS1); /* Clear INTSTS1 */
+       /* IRQ0=LAN, IRQ1=ATA, IRQ3=SLT,PCM */
+       ctrl_outw(0x0001,INTSEL);
+}