1 files changed, 128 insertions, 0 deletions

diff --git a/arch/sh/boards/cqreek/irq.c b/arch/sh/boards/cqreek/irq.c
new file mode 100644
index 000000000000..fa6cfe5a20a7
--- /dev/null
+++ b/arch/sh/boards/cqreek/irq.c
@@ -0,0 +1,128 @@
+/* $Id: irq.c,v 1.1.2.4 2002/11/04 20:33:56 lethal Exp $
+ *
+ * arch/sh/boards/cqreek/irq.c
+ *
+ * Copyright (C) 2000  Niibe Yutaka
+ *
+ * CqREEK IDE/ISA Bridge Support.
+ *
+ */
+
+#include <linux/irq.h>
+#include <linux/init.h>
+
+#include <asm/cqreek/cqreek.h>
+#include <asm/io.h>
+#include <asm/io_generic.h>
+#include <asm/irq.h>
+#include <asm/machvec.h>
+#include <asm/machvec_init.h>
+#include <asm/rtc.h>
+
+struct cqreek_irq_data {
+        unsigned short mask_port;       /* Port of Interrupt Mask Register */
+        unsigned short stat_port;       /* Port of Interrupt Status Register */
+        unsigned short bit;             /* Value of the bit */
+};
+static struct cqreek_irq_data cqreek_irq_data[NR_IRQS];
+
+static void disable_cqreek_irq(unsigned int irq)
+{
+        unsigned long flags;
+        unsigned short mask;
+        unsigned short mask_port = cqreek_irq_data[irq].mask_port;
+        unsigned short bit = cqreek_irq_data[irq].bit;
+
+        local_irq_save(flags);
+        /* Disable IRQ */
+        mask = inw(mask_port) & ~bit;
+        outw_p(mask, mask_port);
+        local_irq_restore(flags);
+}
+
+static void enable_cqreek_irq(unsigned int irq)
+{
+        unsigned long flags;
+        unsigned short mask;
+        unsigned short mask_port = cqreek_irq_data[irq].mask_port;
+        unsigned short bit = cqreek_irq_data[irq].bit;
+
+        local_irq_save(flags);
+        /* Enable IRQ */
+        mask = inw(mask_port) | bit;
+        outw_p(mask, mask_port);
+        local_irq_restore(flags);
+}
+
+static void mask_and_ack_cqreek(unsigned int irq)
+{
+        unsigned short stat_port = cqreek_irq_data[irq].stat_port;
+        unsigned short bit = cqreek_irq_data[irq].bit;
+
+        disable_cqreek_irq(irq);
+        /* Clear IRQ (it might be edge IRQ) */
+        inw(stat_port);
+        outw_p(bit, stat_port);
+}
+
+static void end_cqreek_irq(unsigned int irq)
+{
+        if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+                enable_cqreek_irq(irq);
+}
+
+static unsigned int startup_cqreek_irq(unsigned int irq)
+{ 
+        enable_cqreek_irq(irq);
+        return 0;
+}
+
+static void shutdown_cqreek_irq(unsigned int irq)
+{
+        disable_cqreek_irq(irq);
+}
+
+static struct hw_interrupt_type cqreek_irq_type = {
+        "CqREEK-IRQ",
+        startup_cqreek_irq,
+        shutdown_cqreek_irq,
+        enable_cqreek_irq,
+        disable_cqreek_irq,
+        mask_and_ack_cqreek,
+        end_cqreek_irq
+};
+
+int cqreek_has_ide, cqreek_has_isa;
+
+/* XXX: This is just for test for my NE2000 ISA board
+   What we really need is virtualized IRQ and demultiplexer like HP600 port */
+void __init init_cqreek_IRQ(void)
+{
+        if (cqreek_has_ide) {
+                cqreek_irq_data[14].mask_port = BRIDGE_IDE_INTR_MASK;
+                cqreek_irq_data[14].stat_port = BRIDGE_IDE_INTR_STAT;
+                cqreek_irq_data[14].bit = 1;
+
+                irq_desc[14].handler = &cqreek_irq_type;
+                irq_desc[14].status = IRQ_DISABLED;
+                irq_desc[14].action = 0;
+                irq_desc[14].depth = 1;
+
+                disable_cqreek_irq(14);
+        }
+
+        if (cqreek_has_isa) {
+                cqreek_irq_data[10].mask_port = BRIDGE_ISA_INTR_MASK;
+                cqreek_irq_data[10].stat_port = BRIDGE_ISA_INTR_STAT;
+                cqreek_irq_data[10].bit = (1 << 10);
+
+                /* XXX: Err... we may need demultiplexer for ISA irq... */
+                irq_desc[10].handler = &cqreek_irq_type;
+                irq_desc[10].status = IRQ_DISABLED;
+                irq_desc[10].action = 0;
+                irq_desc[10].depth = 1;
+
+                disable_cqreek_irq(10);
+        }
+}
+