1 files changed, 69 insertions, 0 deletions
diff --git a/include/asm-arm/arch-mx23/spi.h b/include/asm-arm/arch-mx23/spi.h
new file mode 100644
index 0000000..d23d16e
--- /dev/null
+++ b/include/asm-arm/arch-mx23/spi.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2008 Embedded Alley Solutions Inc.
+ *
+ * (C) Copyright 2009-2010 Freescale Semiconductor, Inc.
+ *
+ * SSP/SPI driver
+ *
+ * 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/arch/ssp.h>
+
+/*
+ * Flags to set SPI mode
+ */
+#define SPI_PHASE	0x1 /* Set phase to 1 */
+#define SPI_POLARITY	0x2 /* Set polarity to 1 */
+
+/* Various flags to control SPI transfers */
+#define SPI_START	0x1	/* Lock CS signal */
+#define SPI_STOP	0x2	/* Unlock CS signal */
+
+/*
+ * Init SSPx interface, must be called first
+ */
+void spi_init(void);
+
+/*
+ * Set phase, polarity and CS number (SS0, SS1, SS2)
+ */
+void spi_set_cfg(unsigned int bus, unsigned int cs, unsigned long mode);
+
+
+/*
+ * Send @rx_len bytes from @dout, then receive @rx_len bytes
+ * saving them to @din
+ */
+void spi_txrx(const char *dout, unsigned int tx_len, char *din,
+	       unsigned int rx_len, unsigned long flags);
+
+
+/* Lock/unlock SPI bus */
+static inline void spi_lock(void)
+{
+	disable_interrupts();
+}
+
+static inline void spi_unlock(void)
+{
+	enable_interrupts();
+}
+
+#endif /* SPI_H */