Add SPI method to set SCLK mode

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1669 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 33 insertions, 5 deletions

diff --git a/nuttx/include/nuttx/spi.h b/nuttx/include/nuttx/spi.h
index e07ca6123..57da34304 100644
--- a/nuttx/include/nuttx/spi.h
+++ b/nuttx/include/nuttx/spi.h
@@ -1,7 +1,7 @@
 /****************************************************************************
- * drivers/usbdev/spi.h
+ * include/nuttx/spi.h
  *
- *   Copyright(C) 2008 Gregory Nutt. All rights reserved.
+ *   Copyright(C) 2008-2009 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -88,6 +88,23 @@
 #define SPI_SETFREQUENCY(d,f) ((d)->ops->setfrequency(d,f))
 
 /****************************************************************************
+ * Name: SPI_SETMODE
+ *
+ * Description:
+ *   Set the SPI mode. Optional.  See enum spi_mode_e for mode definitions
+ *
+ * Input Parameters:
+ *   dev -  Device-specific state data
+ *   mode - The SPI mode requested
+ *
+ * Returned Value:
+ *   none
+ *
+ ****************************************************************************/
+
+#define SPI_SETMODE(d,m) ((d)->ops->mode(d,m))
+
+/****************************************************************************
  * Name: SPI_STATUS
  *
  * Description:
@@ -198,21 +215,32 @@ typedef void (*mediachange_t)(void *arg);
  * which is selected or de-seleted.
  */
 
-enum spidev_e
+enum spi_dev_e
 {
   SPIDEV_NONE = 0,  /* Not a valid value */
   SPIDEV_MMCSD,     /* Select SPI MMC/SD device */
   SPIDEV_ETHERNET   /* Select SPI ethernet device */
 };
 
+/* Certain SPI devices may required differnt clocking modes */
+
+enum spi_mode_e
+{
+  SPIDEV_MODE0 = 0,  /* CPOL=0 CHPHA=0 */
+  SPIDEV_MODE1,      /* CPOL=0 CHPHA=1 */
+  SPIDEV_MODE2,      /* CPOL=1 CHPHA=0 */
+  SPIDEV_MODE3       /* CPOL=1 CHPHA=1 */
+};
+
 /* The SPI vtable */
 
 struct spi_dev_s;
 struct spi_ops_s
 {
-  void   (*select)(FAR struct spi_dev_s *dev, enum spidev_e devid, boolean selected);
+  void   (*select)(FAR struct spi_dev_s *dev, enum spi_dev_e devid, boolean selected);
   uint32 (*setfrequency)(FAR struct spi_dev_s *dev, uint32 frequency);
-  ubyte  (*status)(FAR struct spi_dev_s *dev, enum spidev_e devid);
+  void   (*setmode)(FAR struct spi_dev_s *dev, enum spi_mode_e mode);
+  ubyte  (*status)(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
   ubyte  (*sndbyte)(FAR struct spi_dev_s *dev, ubyte ch);
   void   (*sndblock)(FAR struct spi_dev_s *dev, FAR const ubyte *buffer, size_t buflen);
   void   (*recvblock)(FAR struct spi_dev_s *dev, FAR ubyte *buffer, size_t buflen);