1 files changed, 82 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-lpc2292/spi.h b/arch/arm/include/asm/arch-lpc2292/spi.h
new file mode 100644
index 0000000..6ae66e8
--- /dev/null
+++ b/arch/arm/include/asm/arch-lpc2292/spi.h
@@ -0,0 +1,82 @@
+/*
+    This file defines the interface to the lpc22xx SPI module.
+    Copyright (C) 2006  Embedded Artists AB (www.embeddedartists.com)
+
+    This file may be included in software not adhering to the GPL.
+
+    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
+*/
+
+#ifndef SPI_H
+#define SPI_H
+
+#include <config.h>
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/arch/hardware.h>
+
+#define SPIF 0x80
+
+#define spi_lock() disable_interrupts();
+#define spi_unlock() enable_interrupts();
+
+extern unsigned long spi_flags;
+extern unsigned char spi_idle;
+
+int spi_init(void);
+
+static inline unsigned char spi_read(void)
+{
+	unsigned char b;
+
+	PUT8(S0SPDR, spi_idle);
+	while (!(GET8(S0SPSR) & SPIF));
+	b = GET8(S0SPDR);
+
+	return b;
+}
+
+static inline void spi_write(unsigned char b)
+{
+	PUT8(S0SPDR, b);
+	while (!(GET8(S0SPSR) & SPIF));
+	GET8(S0SPDR);		/* this will clear the SPIF bit */
+}
+
+static inline void spi_set_clock(unsigned char clk_value)
+{
+	PUT8(S0SPCCR, clk_value);
+}
+
+static inline void spi_set_cfg(unsigned char phase,
+			       unsigned char polarity,
+			       unsigned char lsbf)
+{
+	unsigned char v = 0x20;	/* master bit set */
+
+	if (phase)
+		v |= 0x08;			/* set phase bit */
+	if (polarity) {
+		v |= 0x10;			/* set polarity bit */
+		spi_idle = 0xFF;
+	} else {
+		spi_idle = 0x00;
+	}
+	if (lsbf)
+		v |= 0x40;			/* set lsbf bit */
+
+	PUT8(S0SPCR, v);
+}
+#endif /* SPI_H */