linux/include/linux/timb_dma.h
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   1/*
   2 * timb_dma.h timberdale FPGA DMA driver defines
   3 * Copyright (c) 2010 Intel Corporation
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software
  16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19/* Supports:
  20 * Timberdale FPGA DMA engine
  21 */
  22
  23#ifndef _LINUX_TIMB_DMA_H
  24#define _LINUX_TIMB_DMA_H
  25
  26/**
  27 * struct timb_dma_platform_data_channel - Description of each individual
  28 *      DMA channel for the timberdale DMA driver
  29 * @rx:                 true if this channel handles data in the direction to
  30 *      the CPU.
  31 * @bytes_per_line:     Number of bytes per line, this is specific for channels
  32 *      handling video data. For other channels this shall be left to 0.
  33 * @descriptors:        Number of descriptors to allocate for this channel.
  34 * @descriptor_elements: Number of elements in each descriptor.
  35 *
  36 */
  37struct timb_dma_platform_data_channel {
  38        bool rx;
  39        unsigned int bytes_per_line;
  40        unsigned int descriptors;
  41        unsigned int descriptor_elements;
  42};
  43
  44/**
  45 * struct timb_dma_platform_data - Platform data of the timberdale DMA driver
  46 * @nr_channels:        Number of defined channels in the channels array.
  47 * @channels:           Definition of the each channel.
  48 *
  49 */
  50struct timb_dma_platform_data {
  51        unsigned nr_channels;
  52        struct timb_dma_platform_data_channel channels[32];
  53};
  54
  55#endif
  56
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