From 6410d604c730db2e581993ff8854ec7a939a89d5 Mon Sep 17 00:00:00 2001 From: patacongo Date: Thu, 5 Jul 2012 14:58:16 +0000 Subject: More LPC43 files in various states of work git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4909 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/arm/src/lpc43xx/lpc43_gpdma.c | 226 +++++++++++++++++++++++++++++++ 1 file changed, 226 insertions(+) create mode 100644 nuttx/arch/arm/src/lpc43xx/lpc43_gpdma.c (limited to 'nuttx/arch/arm/src/lpc43xx/lpc43_gpdma.c') diff --git a/nuttx/arch/arm/src/lpc43xx/lpc43_gpdma.c b/nuttx/arch/arm/src/lpc43xx/lpc43_gpdma.c new file mode 100644 index 000000000..4cfc0327f --- /dev/null +++ b/nuttx/arch/arm/src/lpc43xx/lpc43_gpdma.c @@ -0,0 +1,226 @@ +/**************************************************************************** + * arch/arm/src/lpc43xx/lpc43_gpdma.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include + +#include +#include +#include +#include +#include + +#include + +#include "up_internal.h" +#include "up_arch.h" + +#include "chip.h" + +#include "lpc43_syscon.h" +#include "lpc43_gpdma.h" + +#ifdef CONFIG_LPC43_GPDMA + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/* Enables debug output from this file (needs CONFIG_DEBUG too) */ + +#undef DMA_DEBUG /* Define to enable debug */ +#undef DMA_VERBOSE /* Define to enable verbose debug */ + +#ifdef DMA_DEBUG +# define dmadbg lldbg +# ifdef DMA_VERBOSE +# define spivdbg lldbg +# else +# define spivdbg(x...) +# endif +#else +# undef DMA_VERBOSE +# define dmadbg(x...) +# define spivdbg(x...) +#endif + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: lpc43_dmainitialize + * + * Description: + * Initialize the GPDMA subsystem. + * + * Returned Value: + * None + * + ****************************************************************************/ + +void lpc43_dmainitilaize(void) +{ +} + +/**************************************************************************** + * Name: lpc43_dmachannel + * + * Description: + * Allocate a DMA channel. This function sets aside a DMA channel and + * gives the caller exclusive access to the DMA channel. + * + * Returned Value: + * One success, this function returns a non-NULL, void* DMA channel + * handle. NULL is returned on any failure. This function can fail only + * if no DMA channel is available. + * + ****************************************************************************/ + +DMA_HANDLE lpc43_dmachannel(void) +{ + return NULL; +} + +/**************************************************************************** + * Name: lpc43_dmafree + * + * Description: + * Release a DMA channel. NOTE: The 'handle' used in this argument must + * NEVER be used again until lpc43_dmachannel() is called again to re-gain + * a valid handle. + * + * Returned Value: + * None + * + ****************************************************************************/ + +void lpc43_dmafree(DMA_HANDLE handle) +{ +} + +/**************************************************************************** + * Name: lpc43_dmasetup + * + * Description: + * Configure DMA for one transfer. + * + ****************************************************************************/ + +int lpc43_dmarxsetup(DMA_HANDLE handle, uint32_t control, uint32_t config, + uint32_t srcaddr, uint32_t destaddr, size_t nbytes) +{ + return -ENOSYS; +} + +/**************************************************************************** + * Name: lpc43_dmastart + * + * Description: + * Start the DMA transfer + * + ****************************************************************************/ + +int lpc43_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg) +{ + return -ENOSYS; +} + +/**************************************************************************** + * Name: lpc43_dmastop + * + * Description: + * Cancel the DMA. After lpc43_dmastop() is called, the DMA channel is + * reset and lpc43_dmasetup() must be called before lpc43_dmastart() can be + * called again + * + ****************************************************************************/ + +void lpc43_dmastop(DMA_HANDLE handle) +{ +} + +/**************************************************************************** + * Name: lpc43_dmasample + * + * Description: + * Sample DMA register contents + * + ****************************************************************************/ + +#ifdef CONFIG_DEBUG_DMA +void lpc43_dmasample(DMA_HANDLE handle, struct lpc43_dmaregs_s *regs) +{ +} +#endif /* CONFIG_DEBUG_DMA */ + +/**************************************************************************** + * Name: lpc43_dmadump + * + * Description: + * Dump previously sampled DMA register contents + * + ****************************************************************************/ + +#ifdef CONFIG_DEBUG_DMA +void lpc43_dmadump(DMA_HANDLE handle, const struct lpc43_dmaregs_s *regs, const char *msg) +{ +} +#endif /* CONFIG_DEBUG_DMA */ + +#endif /* CONFIG_LPC43_GPDMA */ -- cgit v1.2.3