Add support for multiplexed SDIO pins from Uros

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3898 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 84 insertions, 0 deletions

diff --git a/nuttx/configs/vsn/include/muxbus.h b/nuttx/configs/vsn/include/muxbus.h
new file mode 100644
index 000000000..595ded46f
--- /dev/null
+++ b/nuttx/configs/vsn/include/muxbus.h
@@ -0,0 +1,84 @@
+/************************************************************************************
+ * configs/vsn/include/muxbus.h
+ * include/arch/board/muxbus.h
+ *
+ *   Copyright (C) 2011 Uros Platise. All rights reserved
+ * 
+ *   Authors: Uros Platise <uros.platise@isotel.eu>
+ *
+ * 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.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_BOARD_MUXBUS_H
+#define __ARCH_BOARD_MUXBUS_H
+
+#ifndef __ASSEMBLY__
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Functions
+ ************************************************************************************/
+
+/**
+ * Initialization of the semaphore and initial bus state.
+ */
+void vsn_muxbus_init(void);
+
+/** 
+ * Simple Lock / Unlock Mechanism for the SDIO Interface
+ * 
+ * NOTE: This function is provided for the stm32_sdio driver.
+ */
+extern void stm32_muxbus_sdio_lock(bool lock);
+
+/**
+ * Set PGA Gain of the Analog Devices AD8231 on bus shared with the 
+ * SDIO interface
+ * 
+ * \param gain sets the front-end gain as 2^{gain}, where gain = 0..7.
+ *   Setting gain outside that range shutdowns the front-end.
+ * 
+ * \return gain set or -1 if front end is put into shutdown.
+ */
+extern int vsn_muxbus_setpgagain(int gain);
+
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif  /* __ARCH_BOARD_MUXBUS_H */