/****************************************************************************
* arch/arm/src/lpc17xx/lpc17_gpdma.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include "up_internal.h"
#include "up_arch.h"
#include "chip.h"
#include "chip/lpc17_syscon.h"
#include "lpc17_gpdma.h"
#ifdef CONFIG_LPC17_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: lpc17_dmainitialize
*
* Description:
* Initialize the GPDMA subsystem.
*
* Returned Value:
* None
*
****************************************************************************/
void lpc17_dmainitilaize(void)
{
}
/****************************************************************************
* Name: lpc17_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 lpc17_dmachannel(void)
{
return NULL;
}
/****************************************************************************
* Name: lpc17_dmafree
*
* Description:
* Release a DMA channel. NOTE: The 'handle' used in this argument must
* NEVER be used again until lpc17_dmachannel() is called again to re-gain
* a valid handle.
*
* Returned Value:
* None
*
****************************************************************************/
void lpc17_dmafree(DMA_HANDLE handle)
{
}
/****************************************************************************
* Name: lpc17_dmasetup
*
* Description:
* Configure DMA for one transfer.
*
****************************************************************************/
int lpc17_dmarxsetup(DMA_HANDLE handle, uint32_t control, uint32_t config,
uint32_t srcaddr, uint32_t destaddr, size_t nbytes)
{
return -ENOSYS;
}
/****************************************************************************
* Name: lpc17_dmastart
*
* Description:
* Start the DMA transfer
*
****************************************************************************/
int lpc17_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg)
{
return -ENOSYS;
}
/****************************************************************************
* Name: lpc17_dmastop
*
* Description:
* Cancel the DMA. After lpc17_dmastop() is called, the DMA channel is
* reset and lpc17_dmasetup() must be called before lpc17_dmastart() can be
* called again
*
****************************************************************************/
void lpc17_dmastop(DMA_HANDLE handle)
{
}
/****************************************************************************
* Name: lpc17_dmasample
*
* Description:
* Sample DMA register contents
*
****************************************************************************/
#ifdef CONFIG_DEBUG_DMA
void lpc17_dmasample(DMA_HANDLE handle, struct lpc17_dmaregs_s *regs)
{
}
#endif /* CONFIG_DEBUG_DMA */
/****************************************************************************
* Name: lpc17_dmadump
*
* Description:
* Dump previously sampled DMA register contents
*
****************************************************************************/
#ifdef CONFIG_DEBUG_DMA
void lpc17_dmadump(DMA_HANDLE handle, const struct lpc17_dmaregs_s *regs, const char *msg)
{
}
#endif /* CONFIG_DEBUG_DMA */
#endif /* CONFIG_LPC17_GPDMA */
