From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-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!
---
 arch/arm/mach-s3c2410/bast-irq.c | 132 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 arch/arm/mach-s3c2410/bast-irq.c

(limited to 'arch/arm/mach-s3c2410/bast-irq.c')

diff --git a/arch/arm/mach-s3c2410/bast-irq.c b/arch/arm/mach-s3c2410/bast-irq.c
new file mode 100644
index 00000000000..5e5bbe893cb
--- /dev/null
+++ b/arch/arm/mach-s3c2410/bast-irq.c
@@ -0,0 +1,132 @@
+/* linux/arch/arm/mach-s3c2410/bast-irq.c
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ *   Ben Dooks <ben@simtec.co.uk>
+ *
+ * http://www.simtec.co.uk/products/EB2410ITX/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Modifications:
+ *     08-Jan-2003 BJD  Moved from central IRQ code
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/ptrace.h>
+#include <linux/sysdev.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include <asm/mach/irq.h>
+#include <asm/hardware/s3c2410/irq.h>
+
+#if 0
+#include <asm/debug-ll.h>
+#endif
+
+#define irqdbf(x...)
+#define irqdbf2(x...)
+
+
+/* handle PC104 ISA interrupts from the system CPLD */
+
+/* table of ISA irq nos to the relevant mask... zero means
+ * the irq is not implemented
+*/
+static unsigned char bast_pc104_irqmasks[] = {
+	0,   /* 0 */
+	0,   /* 1 */
+	0,   /* 2 */
+	1,   /* 3 */
+	0,   /* 4 */
+	2,   /* 5 */
+	0,   /* 6 */
+	4,   /* 7 */
+	0,   /* 8 */
+	0,   /* 9 */
+	8,   /* 10 */
+	0,   /* 11 */
+	0,   /* 12 */
+	0,   /* 13 */
+	0,   /* 14 */
+	0,   /* 15 */
+};
+
+static unsigned char bast_pc104_irqs[] = { 3, 5, 7, 10 };
+
+static void
+bast_pc104_mask(unsigned int irqno)
+{
+	unsigned long temp;
+
+	temp = __raw_readb(BAST_VA_PC104_IRQMASK);
+	temp &= ~bast_pc104_irqmasks[irqno];
+	__raw_writeb(temp, BAST_VA_PC104_IRQMASK);
+
+	if (temp == 0)
+		bast_extint_mask(IRQ_ISA);
+}
+
+static void
+bast_pc104_ack(unsigned int irqno)
+{
+	bast_extint_ack(IRQ_ISA);
+}
+
+static void
+bast_pc104_unmask(unsigned int irqno)
+{
+	unsigned long temp;
+
+	temp = __raw_readb(BAST_VA_PC104_IRQMASK);
+	temp |= bast_pc104_irqmasks[irqno];
+	__raw_writeb(temp, BAST_VA_PC104_IRQMASK);
+
+	bast_extint_unmask(IRQ_ISA);
+}
+
+static struct bast_pc104_chip = {
+	.mask	     = bast_pc104_mask,
+	.unmask	     = bast_pc104_unmask,
+	.ack	     = bast_pc104_ack
+};
+
+static void
+bast_irq_pc104_demux(unsigned int irq,
+		     struct irqdesc *desc,
+		     struct pt_regs *regs)
+{
+	unsigned int stat;
+	unsigned int irqno;
+	int i;
+
+	stat = __raw_readb(BAST_VA_PC104_IRQREQ) & 0xf;
+
+	for (i = 0; i < 4 && stat != 0; i++) {
+		if (stat & 1) {
+			irqno = bast_pc104_irqs[i];
+			desc = irq_desc + irqno;
+
+			desc->handle(irqno, desc, regs);
+		}
+
+		stat >>= 1;
+	}
+}
-- 
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