linux/include/linux/intel_mid_dma.h
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   1/*
   2 *  intel_mid_dma.h - Intel MID DMA Drivers
   3 *
   4 *  Copyright (C) 2008-10 Intel Corp
   5 *  Author: Vinod Koul <vinod.koul@intel.com>
   6 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   7 *
   8 *  This program is free software; you can redistribute it and/or modify
   9 *  it under the terms of the GNU General Public License as published by
  10 *  the Free Software Foundation; version 2 of the License.
  11 *
  12 *  This program is distributed in the hope that it will be useful, but
  13 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 *  General Public License for more details.
  16 *
  17 *  You should have received a copy of the GNU General Public License along
  18 *  with this program; if not, write to the Free Software Foundation, Inc.,
  19 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  20 *
  21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  22 *
  23 *
  24 */
  25#ifndef __INTEL_MID_DMA_H__
  26#define __INTEL_MID_DMA_H__
  27
  28#include <linux/dmaengine.h>
  29
  30#define DMA_PREP_CIRCULAR_LIST          (1 << 10)
  31
  32/*DMA mode configurations*/
  33enum intel_mid_dma_mode {
  34        LNW_DMA_PER_TO_MEM = 0, /*periphral to memory configuration*/
  35        LNW_DMA_MEM_TO_PER,     /*memory to periphral configuration*/
  36        LNW_DMA_MEM_TO_MEM,     /*mem to mem confg (testing only)*/
  37};
  38
  39/*DMA handshaking*/
  40enum intel_mid_dma_hs_mode {
  41        LNW_DMA_HW_HS = 0,      /*HW Handshaking only*/
  42        LNW_DMA_SW_HS = 1,      /*SW Handshaking not recommended*/
  43};
  44
  45/*Burst size configuration*/
  46enum intel_mid_dma_msize {
  47        LNW_DMA_MSIZE_1 = 0x0,
  48        LNW_DMA_MSIZE_4 = 0x1,
  49        LNW_DMA_MSIZE_8 = 0x2,
  50        LNW_DMA_MSIZE_16 = 0x3,
  51        LNW_DMA_MSIZE_32 = 0x4,
  52        LNW_DMA_MSIZE_64 = 0x5,
  53};
  54
  55/**
  56 * struct intel_mid_dma_slave - DMA slave structure
  57 *
  58 * @dirn: DMA trf direction
  59 * @src_width: tx register width
  60 * @dst_width: rx register width
  61 * @hs_mode: HW/SW handshaking mode
  62 * @cfg_mode: DMA data transfer mode (per-per/mem-per/mem-mem)
  63 * @src_msize: Source DMA burst size
  64 * @dst_msize: Dst DMA burst size
  65 * @per_addr: Periphral address
  66 * @device_instance: DMA peripheral device instance, we can have multiple
  67 *              peripheral device connected to single DMAC
  68 */
  69struct intel_mid_dma_slave {
  70        enum intel_mid_dma_hs_mode      hs_mode;  /*handshaking*/
  71        enum intel_mid_dma_mode         cfg_mode; /*mode configuration*/
  72        unsigned int            device_instance; /*0, 1 for periphral instance*/
  73        struct dma_slave_config         dma_slave;
  74};
  75
  76#endif /*__INTEL_MID_DMA_H__*/
  77
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