1 files changed, 77 insertions, 0 deletions

diff --git a/firmware/target/arm/olympus/mrobe-500/spi-mr500.c b/firmware/target/arm/olympus/mrobe-500/spi-mr500.c
new file mode 100644
index 0000000000..6c0d4b5990
--- /dev/null
+++ b/firmware/target/arm/olympus/mrobe-500/spi-mr500.c
@@ -0,0 +1,77 @@
+/*
+ * SPI interface driver for the DM320 SoC
+ *
+ * Copyright (C) 2007 shirour <mrobefan@gmail.com>
+ * Copyright (C) 2007 Catalin Patulea <cat@vv.carleton.ca>
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``AS IS'' AND   ANY EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO EVENT  SHALL   THE AUTHOR  BE  LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "system.h"
+
+#define GIO_TS_ENABLE (1<<2)
+#define clr_gio_enable() outw(GIO_TS_ENABLE, IO_GIO_BITSET1)
+#define set_gio_enable() outw(GIO_TS_ENABLE, IO_GIO_BITCLR1)
+
+int dm320_spi_block_transfer(const uint8_t *tx_bytes, unsigned int tx_size,
+    uint8_t *rx_bytes, unsigned int rx_size)
+{
+    /* Activate the slave select pin */
+    set_gio_enable();
+
+    while (tx_size--)
+    {
+        /* Send one byte */
+        IO_SERIAL0_TX_DATA = *tx_bytes++;
+
+        /* Wait until transfer finished */
+        while (IO_SERIAL0_RX_DATA & 0x100);
+    }
+
+    while (rx_size--)
+    {
+        /* Make the clock tick */
+        IO_SERIAL0_TX_DATA = 0;
+
+        /* Wait until transfer finished */
+        unsigned short data;
+        while ((data = IO_SERIAL0_RX_DATA) & 0x100);
+        
+        *rx_bytes++ = data & 0xff;
+    }
+
+    clr_gio_enable();
+
+    return 0;
+}
+
+void dm320_spi_init(void)
+{
+    /* Set SCLK idle level = 0 */
+    IO_SERIAL0_MODE |= (1<<10);
+    
+    /* Enable TX */
+    IO_SERIAL0_TX_ENABLE = 0x0001;
+
+    /* Set GIO 18 to output for touch screen slave enable */
+    outw(inw(IO_GIO_DIR1)&~GIO_TS_ENABLE, IO_GIO_DIR1);
+    clr_gio_enable();
+}