include/linux/timb_dma.h

   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  */
  37 struct 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  */
  50 struct timb_dma_platform_data {
  51         unsigned nr_channels;
  52         struct timb_dma_platform_data_channel channels[32];
  53 };
  54
  55 #endif