[patch 12/14] s3c2412/s3c2413 support

[Koen Martens <linuxarm@metro.cx>]

Start of s3c2412 dsc support.

Signed-off-by: Koen Martens <gmc@sonologic.nl>


--- linux-2.6.15.4/arch/arm/mach-s3c2410/s3c2412-dsc.c    1970-01-01 
01:00:00.000000000 +0100
+++ golinux/arch/arm/mach-s3c2410/s3c2412-dsc.c    2006-02-27 
17:12:40.000000000 +0100
@@ -0,0 +1,60 @@
+/* linux/arch/arm/mach-s3c2410/s3c2440-dsc.c
+ *
+ * Copyright (c) 2004-2005 Simtec Electronics
+ *   Ben Dooks <ben@simtec.co.uk>
+ *
+ * Samsung S3C2412 Drive Strength Control support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Modifications:
+ *     29-Aug-2004 BJD  Start of drive-strength control
+ *     09-Nov-2004 BJD  Added symbol export
+ *     11-Jan-2005 BJD  Include fix
+ *     27-Feb-2006 KM   Start of S3C2412 support
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <asm/arch/regs-gpio.h>
+#include <asm/arch/regs-dsc.h>
+
+#include "cpu.h"
+#include "s3c2412.h"
+
+int s3c2412_set_dsc(unsigned int pin, unsigned int value)
+{
+    void __iomem *base;
+    unsigned long val;
+    unsigned long flags;
+    unsigned long mask;
+
+    base = (pin & S3C2412_SELECT_DSC1) ? S3C2412_DSC1 : S3C2412_DSC0;
+    mask = 3 << S3C2440_DSC_GETSHIFT(pin);
+
+    local_irq_save(flags);
+
+    val = __raw_readl(base);
+    val &= ~mask;
+    val |= value & mask;
+    __raw_writel(val, base);
+
+    local_irq_restore(flags);
+    return 0;
+}
+
+EXPORT_SYMBOL(s3c2412_set_dsc);

--
K.F.J. Martens, Sonologic, http://www.sonologic.nl/
Networking, hosting, embedded systems, unix, artificial intelligence.
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