Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 114 insertions, 0 deletions

diff --git a/arch/mips/vr41xx/nec-cmbvr4133/irq.c b/arch/mips/vr41xx/nec-cmbvr4133/irq.c
new file mode 100644
index 000000000000..31db6b61a39e
--- /dev/null
+++ b/arch/mips/vr41xx/nec-cmbvr4133/irq.c
@@ -0,0 +1,114 @@
+/*
+ * arch/mips/vr41xx/nec-cmbvr4133/irq.c
+ *
+ * Interrupt routines for the NEC CMB-VR4133 board.
+ *
+ * Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com> and
+ *         Alex Sapkov <asapkov@ru.mvista.com>
+ *
+ * 2003-2004 (c) MontaVista, Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ * Support for NEC-CMBVR4133 in 2.6
+ * Manish Lachwani (mlachwani@mvista.com)
+ */
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+#include <asm/vr41xx/cmbvr4133.h>
+
+extern void enable_8259A_irq(unsigned int irq);
+extern void disable_8259A_irq(unsigned int irq);
+extern void mask_and_ack_8259A(unsigned int irq);
+extern void init_8259A(int hoge);
+
+extern int vr4133_rockhopper;
+
+static unsigned int startup_i8259_irq(unsigned int irq)
+{
+        enable_8259A_irq(irq - I8259_IRQ_BASE);
+        return 0;
+}
+
+static void shutdown_i8259_irq(unsigned int irq)
+{
+        disable_8259A_irq(irq - I8259_IRQ_BASE);
+}
+
+static void enable_i8259_irq(unsigned int irq)
+{
+        enable_8259A_irq(irq - I8259_IRQ_BASE);
+}
+
+static void disable_i8259_irq(unsigned int irq)
+{
+        disable_8259A_irq(irq - I8259_IRQ_BASE);
+}
+
+static void ack_i8259_irq(unsigned int irq)
+{
+        mask_and_ack_8259A(irq - I8259_IRQ_BASE);
+}
+
+static void end_i8259_irq(unsigned int irq)
+{
+        if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+                enable_8259A_irq(irq - I8259_IRQ_BASE);
+}
+
+static struct hw_interrupt_type i8259_irq_type = {
+        .typename       = "XT-PIC",
+        .startup        = startup_i8259_irq,
+        .shutdown       = shutdown_i8259_irq,
+        .enable         = enable_i8259_irq,
+        .disable        = disable_i8259_irq,
+        .ack            = ack_i8259_irq,
+        .end            = end_i8259_irq,
+};
+
+static int i8259_get_irq_number(int irq)
+{
+        unsigned long isr;
+
+        isr = inb(0x20);
+        irq = ffz(~isr);
+        if (irq == 2) {
+                isr = inb(0xa0);
+                irq = 8 + ffz(~isr);
+        }
+
+        if (irq < 0 || irq > 15)
+                return -EINVAL;
+
+        return I8259_IRQ_BASE + irq;
+}
+
+static struct irqaction i8259_slave_cascade = {
+        .handler        = &no_action,
+        .name           = "cascade",
+};
+
+void __init rockhopper_init_irq(void)
+{
+        int i;
+
+        if(!vr4133_rockhopper) {
+                printk(KERN_ERR "Not a Rockhopper Board \n");
+                return;
+        }
+
+        for (i = I8259_IRQ_BASE; i <= I8259_IRQ_LAST; i++)
+                irq_desc[i].handler = &i8259_irq_type;
+
+        setup_irq(I8259_SLAVE_IRQ, &i8259_slave_cascade);
+
+        vr41xx_set_irq_trigger(CMBVR41XX_INTC_PIN, TRIGGER_LEVEL, SIGNAL_THROUGH);
+        vr41xx_set_irq_level(CMBVR41XX_INTC_PIN, LEVEL_HIGH);
+        vr41xx_cascade_irq(CMBVR41XX_INTC_IRQ, i8259_get_irq_number);
+}