include/linux/timb_dma.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * timb_dma.h timberdale FPGA DMA driver defines
   4  * Copyright (c) 2010 Intel Corporation
   5  */
   6
   7 /* Supports:
   8  * Timberdale FPGA DMA engine
   9  */
  10
  11 #ifndef _LINUX_TIMB_DMA_H
  12 #define _LINUX_TIMB_DMA_H
  13
  14 /**
  15  * struct timb_dma_platform_data_channel - Description of each individual
  16  *      DMA channel for the timberdale DMA driver
  17  * @rx:                 true if this channel handles data in the direction to
  18  *      the CPU.
  19  * @bytes_per_line:     Number of bytes per line, this is specific for channels
  20  *      handling video data. For other channels this shall be left to 0.
  21  * @descriptors:        Number of descriptors to allocate for this channel.
  22  * @descriptor_elements: Number of elements in each descriptor.
  23  *
  24  */
  25 struct timb_dma_platform_data_channel {
  26         bool rx;
  27         unsigned int bytes_per_line;
  28         unsigned int descriptors;
  29         unsigned int descriptor_elements;
  30 };
  31
  32 /**
  33  * struct timb_dma_platform_data - Platform data of the timberdale DMA driver
  34  * @nr_channels:        Number of defined channels in the channels array.
  35  * @channels:           Definition of the each channel.
  36  *
  37  */
  38 struct timb_dma_platform_data {
  39         unsigned nr_channels;
  40         struct timb_dma_platform_data_channel channels[32];
  41 };
  42
  43 #endif