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Diffstat (limited to 'nuttx/arch/arm/src/sam3u/sam_dmac.h')
| -rw-r--r-- | nuttx/arch/arm/src/sam3u/sam_dmac.h | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/nuttx/arch/arm/src/sam3u/sam_dmac.h b/nuttx/arch/arm/src/sam3u/sam_dmac.h deleted file mode 100644 index f07303011..000000000 --- a/nuttx/arch/arm/src/sam3u/sam_dmac.h +++ /dev/null @@ -1,297 +0,0 @@ -/************************************************************************************ - * arch/arm/src/sam3u/sam_dmac.h - * - * Copyright (C) 2009-2011, 2013 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. - * - ************************************************************************************/ - -#ifndef __ARCH_ARM_SRC_SAM3U_SAM_DMAC_H -#define __ARCH_ARM_SRC_SAM3U_SAM_DMAC_H - -/************************************************************************************ - * Included Files - ************************************************************************************/ - -#include <nuttx/config.h> - -#include <stdint.h> - -#include "chip.h" - -/************************************************************************************ - * Definitions - ************************************************************************************/ - -/* Configuration ********************************************************************/ - -#ifndef CONFIG_DEBUG -# undef CONFIG_DEBUG_DMA -#endif - -/* DMA ******************************************************************************/ - -/* Flags used to characterize the desired DMA channel. The naming convention is that - * one side is the peripheral and the other is memory (however, the interface could still - * be used if, for example, both sides were memory although the naming would be awkward) - */ - -/* Unchange-able properties of the channel */ - -#define DMACH_FLAG_FLOWCONTROL (1 << 0) /* Bit 0: Channel supports flow control */ -#define DMACH_FLAG_FIFOSIZE_SHIFT (1) /* Bit 1: Size of DMA FIFO */ -#define DMACH_FLAG_FIFOSIZE_MASK (1 << DMACH_FLAG_FIFOSIZE_SHIFT) -# define DMACH_FLAG_FIFO_8BYTES (0 << DMACH_FLAG_FIFOSIZE_SHIFT) /* 8 bytes */ -# define DMACH_FLAG_FIFO_32BYTES (1 << DMACH_FLAG_FIFOSIZE_SHIFT) /* 32 bytes */ - -/* Configurable properties of the channel */ - -#define DMACH_FLAG_BURST_LARGEST 0 /* Largest length AHB burst */ -#define DMACH_FLAG_BURST_HALF 1 /* Half FIFO size */ -#define DMACH_FLAG_BURST_SINGLE 2 /* Single AHB access */ - -#define DMACH_FLAG_FIFOCFG_SHIFT (2) /* Bits 2-3: FIFO configuration */ -#define DMACH_FLAG_FIFOCFG_MASK (3 << DMACH_FLAG_FIFOCFG_SHIFT) -# define DMACH_FLAG_FIFOCFG_LARGEST (DMACH_FLAG_BURST_LARGEST << DMACH_FLAG_FIFOCFG_SHIFT) -# define DMACH_FLAG_FIFOCFG_HALF (DMACH_FLAG_BURST_HALF << DMACH_FLAG_FIFOCFG_SHIFT) -# define DMACH_FLAG_FIFOCFG_SINGLE (DMACH_FLAG_BURST_SINGLE << DMACH_FLAG_FIFOCFG_SHIFT) - -/* Peripheral endpoint characteristics */ - -#define DMACH_FLAG_PERIPHPID_SHIFT (4) /* Bits 4-7: Peripheral PID */ -#define DMACH_FLAG_PERIPHPID_MASK (15 << DMACH_FLAG_PERIPHPID_SHIFT) -#define DMACH_FLAG_PERIPHH2SEL (1 << 8) /* Bits 8: HW handshaking */ -#define DMACH_FLAG_PERIPHISPERIPH (1 << 9) /* Bits 9: 0=memory; 1=peripheral */ -#define DMACH_FLAG_PERIPHWIDTH_SHIFT (10) /* Bits 10-11: Peripheral width */ -#define DMACH_FLAG_PERIPHWIDTH_MASK (3 << DMACH_FLAG_PERIPHWIDTH_SHIFT) -# define DMACH_FLAG_PERIPHWIDTH_8BITS (0 << DMACH_FLAG_PERIPHWIDTH_SHIFT) /* 8 bits */ -# define DMACH_FLAG_PERIPHWIDTH_16BITS (1 << DMACH_FLAG_PERIPHWIDTH_SHIFT) /* 16 bits */ -# define DMACH_FLAG_PERIPHWIDTH_32BITS (2 << DMACH_FLAG_PERIPHWIDTH_SHIFT) /* 32 bits */ -#define DMACH_FLAG_PERIPHINCREMENT (1 << 12) /* Bit 12: Autoincrement peripheral address */ -#define DMACH_FLAG_PERIPHCHUNKSIZE (1 << 13) /* Bit 13: Peripheral chunk size */ -# define DMACH_FLAG_PERIPHCHUNKSIZE_1 (0) /* Peripheral chunksize = 1 */ -# define DMACH_FLAG_PERIPHCHUNKSIZE_4 DMACH_FLAG_PERIPHCHUNKSIZE /* Peripheral chunksize = 4 */ - -/* Memory endpoint characteristics */ - -#define DMACH_FLAG_MEMPID_SHIFT (14) /* Bits 14-17: Memory PID */ -#define DMACH_FLAG_MEMPID_MASK (15 << DMACH_FLAG_PERIPHPID_SHIFT) -#define DMACH_FLAG_MEMH2SEL (1 << 18) /* Bits 18: HW handshaking */ -#define DMACH_FLAG_MEMISPERIPH (1 << 19) /* Bits 19: 0=memory; 1=peripheral */ -#define DMACH_FLAG_MEMWIDTH_SHIFT (20) /* Bits 20-21: Memory width */ -#define DMACH_FLAG_MEMWIDTH_MASK (3 << DMACH_FLAG_MEMWIDTH_SHIFT) -# define DMACH_FLAG_MEMWIDTH_8BITS (0 << DMACH_FLAG_MEMWIDTH_SHIFT) /* 8 bits */ -# define DMACH_FLAG_MEMWIDTH_16BITS (1 << DMACH_FLAG_MEMWIDTH_SHIFT) /* 16 bits */ -# define DMACH_FLAG_MEMWIDTH_32BITS (2 << DMACH_FLAG_MEMWIDTH_SHIFT) /* 32 bits */ -#define DMACH_FLAG_MEMINCREMENT (1 << 22) /* Bit 22: Autoincrement memory address */ -#define DMACH_FLAG_MEMCHUNKSIZE (1 << 22) /* Bit 23: Memory chunk size */ -# define DMACH_FLAG_MEMCHUNKSIZE_1 (0) /* Memory chunksize = 1 */ -# define DMACH_FLAG_MEMCHUNKSIZE_4 DMACH_FLAG_MEMCHUNKSIZE /* Memory chunksize = 4 */ - -/************************************************************************************ - * Public Types - ************************************************************************************/ - -typedef FAR void *DMA_HANDLE; -typedef void (*dma_callback_t)(DMA_HANDLE handle, void *arg, int result); - -/* The following is used for sampling DMA registers when CONFIG DEBUG_DMA is selected */ - -#ifdef CONFIG_DEBUG_DMA -struct sam_dmaregs_s -{ - /* Global Registers */ - - uint32_t gcfg; /* DMAC Global Configuration Register */ - uint32_t en; /* DMAC Enable Register */ - uint32_t sreq; /* DMAC Software Single Request Register */ - uint32_t creq; /* DMAC Software Chunk Transfer Request Register */ - uint32_t last; /* DMAC Software Last Transfer Flag Register */ - uint32_t ebcimr; /* DMAC Error Mask */ - uint32_t ebcisr; /* DMAC Error Status */ - uint32_t chsr; /* DMAC Channel Handler Status Register */ - - /* Channel Registers */ - - uint32_t saddr; /* DMAC Channel Source Address Register */ - uint32_t daddr; /* DMAC Channel Destination Address Register */ - uint32_t dscr; /* DMAC Channel Descriptor Address Register */ - uint32_t ctrla; /* DMAC Channel Control A Register */ - uint32_t ctrlb; /* DMAC Channel Control B Register */ - uint32_t cfg; /* DMAC Channel Configuration Register */ -}; -#endif - -/************************************************************************************ - * Inline Functions - ************************************************************************************/ - -#ifndef __ASSEMBLY__ - -/************************************************************************************ - * Public Data - ************************************************************************************/ - -#undef EXTERN -#if defined(__cplusplus) -#define EXTERN extern "C" -extern "C" -{ -#else -#define EXTERN extern -#endif - -/************************************************************************************ - * Public Function Prototypes - ************************************************************************************/ - -/**************************************************************************** - * Name: sam_dmachannel - * - * Description: - * Allocate a DMA channel. This function sets aside a DMA channel with - * the required FIFO size and flow control capabilities (determined by - * dma_flags) then gives the caller exclusive access to the DMA channel. - * - * The naming convention in all of the DMA interfaces is that one side is - * the 'peripheral' and the other is 'memory'. Howerver, the interface - * could still be used if, for example, both sides were memory although - * the naming would be awkward. - * - * Returned Value: - * If a DMA channel if the required FIFO size is available, this function - * returns a non-NULL, void* DMA channel handle. NULL is returned on any - * failure. - * - ****************************************************************************/ - -DMA_HANDLE sam_dmachannel(uint32_t dmach_flags); - -/**************************************************************************** - * Name: sam_dmafree - * - * Description: - * Release a DMA channel. NOTE: The 'handle' used in this argument must - * NEVER be used again until sam_dmachannel() is called again to re-gain - * a valid handle. - * - * Returned Value: - * None - * - ****************************************************************************/ - -void sam_dmafree(DMA_HANDLE handle); - -/**************************************************************************** - * Name: sam_dmatxsetup - * - * Description: - * Configure DMA for transmit of one buffer (memory to peripheral). This - * function may be called multiple times to handle large and/or dis- - * continuous transfers. Calls to sam_dmatxsetup() and sam_dmarxsetup() - * must not be intermixed on the same transfer, however. - * - ****************************************************************************/ - -int sam_dmatxsetup(DMA_HANDLE handle, uint32_t paddr, uint32_t maddr, - size_t nbytes); - -/**************************************************************************** - * Name: sam_dmarxsetup - * - * Description: - * Configure DMA for receipt of one buffer (peripheral to memory). This - * function may be called multiple times to handle large and/or dis- - * continuous transfers. Calls to sam_dmatxsetup() and sam_dmarxsetup() - * must not be intermixed on the same transfer, however. - * - ****************************************************************************/ - -int sam_dmarxsetup(DMA_HANDLE handle, uint32_t paddr, uint32_t maddr, - size_t nbytes); - -/**************************************************************************** - * Name: sam_dmastart - * - * Description: - * Start the DMA transfer - * - ****************************************************************************/ - -int sam_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg); - -/**************************************************************************** - * Name: sam_dmastop - * - * Description: - * Cancel the DMA. After sam_dmastop() is called, the DMA channel is - * reset and sam_dmarx/txsetup() must be called before sam_dmastart() can be - * called again - * - ****************************************************************************/ - -void sam_dmastop(DMA_HANDLE handle); - -/**************************************************************************** - * Name: sam_dmasample - * - * Description: - * Sample DMA register contents - * - ****************************************************************************/ - -#ifdef CONFIG_DEBUG_DMA -void sam_dmasample(DMA_HANDLE handle, struct sam_dmaregs_s *regs); -#else -# define sam_dmasample(handle,regs) -#endif - -/**************************************************************************** - * Name: sam_dmadump - * - * Description: - * Dump previously sampled DMA register contents - * - ****************************************************************************/ - -#ifdef CONFIG_DEBUG_DMA -void sam_dmadump(DMA_HANDLE handle, const struct sam_dmaregs_s *regs, - const char *msg); -#else -# define sam_dmadump(handle,regs,msg) -#endif - -#undef EXTERN -#if defined(__cplusplus) -} -#endif - -#endif /* __ASSEMBLY__ */ -#endif /* __ARCH_ARM_SRC_SAM3U_SAM_DMAC_H */ |