1 files changed, 141 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/calypso/calypso_spi.c b/nuttx/arch/arm/src/calypso/calypso_spi.c
new file mode 100644
index 000000000..cc20f2072
--- /dev/null
+++ b/nuttx/arch/arm/src/calypso/calypso_spi.c
@@ -0,0 +1,141 @@
+/****************************************************************************
+ * calypso_spi.c
+ * SPI driver for TI Calypso
+ *
+ *   Copyright (C) 2011 Stefan Richter <ichgeh@l--putt.de>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ *
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/spi.h>
+
+#warning "MOST OF SPI API IS INCOMPLETE! (Wrapper around Osmocom driver)"
+extern void spi_init(void);
+extern int spi_xfer(uint8_t dev_idx, uint8_t bitlen, const void *dout, void *din);
+
+#ifndef CONFIG_SPI_EXCHANGE
+#error "Calypso HW only supports exchange. Enable CONFIG_SPI_EXCHANGE!"
+#endif
+
+struct calypso_spidev_s
+{
+	struct spi_dev_s spidev;	/* External driver interface */
+	int		 nbits;		/* Number of transfered bits */
+
+#ifndef CONFIG_SPI_OWNBUS
+	sem_t		 exclsem;	/* Mutual exclusion of devices */
+#endif
+};
+
+/* STUBS! */
+#ifndef CONFIG_SPI_OWNBUS
+static int spi_lock(FAR struct spi_dev_s *dev, bool lock);
+#endif
+
+static void spi_select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
+	bool selected)
+{
+}
+
+static uint32_t spi_setfrequency(FAR struct spi_dev_s *dev, uint32_t frequency)
+{
+	return frequency;
+}
+
+static void spi_setmode(FAR struct spi_dev_s *dev, enum spi_mode_e mode)
+{
+}
+
+/* Osmocom wrapper */
+static void spi_setbits(FAR struct spi_dev_s *dev, int nbits)
+{
+	((FAR struct calypso_spidev_s *)dev)->nbits = nbits;
+}
+
+static void spi_exchange(FAR struct spi_dev_s *dev, FAR const void *txbuffer,
+	FAR void *rxbuffer, size_t nwords)
+{
+	FAR struct calypso_spidev_s *priv = (FAR struct calypso_spidev_s *)dev;
+	size_t i;
+
+	for(i=0; i<nwords; i++)
+		spi_xfer(0, priv->nbits, txbuffer+i, rxbuffer+i);
+}
+
+static uint16_t spi_send(FAR struct spi_dev_s *dev, uint16_t wd)
+{
+	uint16_t buf = wd;
+	spi_exchange(dev, &buf, &buf, 1);
+	return buf;
+}
+
+static const struct spi_ops_s g_spiops =
+{
+#ifndef CONFIG_SPI_OWNBUS
+  .lock              = spi_lock,
+#endif
+  .select            = spi_select,
+  .setfrequency      = spi_setfrequency,
+  .setmode           = spi_setmode,
+  .setbits           = spi_setbits,
+  .status            = 0,
+#ifdef CONFIG_SPI_CMDDATA
+  .cmddata           = ,
+#endif
+  .send              = spi_send,
+#ifdef CONFIG_SPI_EXCHANGE
+  .exchange          = spi_exchange,
+#else
+  .sndblock          = spi_sndblock,
+  .recvblock         = spi_recvblock,
+#endif
+  .registercallback  = 0,
+};
+
+static struct calypso_spidev_s g_spidev =
+{
+	.spidev	= { &g_spiops },
+	.nbits	= 0,
+};
+
+FAR struct spi_dev_s *up_spiinitialize(int port)
+{
+	switch(port) {
+	case 0:		/* SPI master device */
+		spi_init();
+		return (FAR struct spi_dev_s *)&g_spidev;
+	case 1:		/* uWire device */
+		return NULL;
+	default:
+		return NULL;
+	}
+}