/*
   *  intel_mid_dma.h - Intel MID DMA Drivers
   *
   *  Copyright (C) 2008-10 Intel Corp
   *  Author: Vinod Koul <vinod.koul@intel.com>
   *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; version 2 of the License.
   *
   *  This program is distributed in the hope that it will be useful, but
   *  WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   *  General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License along
   *  with this program; if not, write to the Free Software Foundation, Inc.,
   *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
   *
   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   *
   */
  #ifndef __INTEL_MID_DMA_H__
  #define __INTEL_MID_DMA_H__
  
  #include <linux/dmaengine.h>

  #define DMA_PREP_CIRCULAR_LIST		(1 << 10)

  
  /*DMA mode configurations*/
  enum intel_mid_dma_mode {
  	LNW_DMA_PER_TO_MEM = 0, /*periphral to memory configuration*/
  	LNW_DMA_MEM_TO_PER,	/*memory to periphral configuration*/
  	LNW_DMA_MEM_TO_MEM,	/*mem to mem confg (testing only)*/
  };
  
  /*DMA handshaking*/
  enum intel_mid_dma_hs_mode {
  	LNW_DMA_HW_HS = 0,	/*HW Handshaking only*/
  	LNW_DMA_SW_HS = 1,	/*SW Handshaking not recommended*/
  };
  
  /*Burst size configuration*/
  enum intel_mid_dma_msize {
  	LNW_DMA_MSIZE_1 = 0x0,
  	LNW_DMA_MSIZE_4 = 0x1,
  	LNW_DMA_MSIZE_8 = 0x2,
  	LNW_DMA_MSIZE_16 = 0x3,
  	LNW_DMA_MSIZE_32 = 0x4,
  	LNW_DMA_MSIZE_64 = 0x5,
  };
  
  /**
   * struct intel_mid_dma_slave - DMA slave structure
   *
   * @dirn: DMA trf direction
   * @src_width: tx register width
   * @dst_width: rx register width
   * @hs_mode: HW/SW handshaking mode
   * @cfg_mode: DMA data transfer mode (per-per/mem-per/mem-mem)
   * @src_msize: Source DMA burst size
   * @dst_msize: Dst DMA burst size

   * @per_addr: Periphral address

   * @device_instance: DMA peripheral device instance, we can have multiple
   *		peripheral device connected to single DMAC
   */
  struct intel_mid_dma_slave {

  	enum intel_mid_dma_hs_mode	hs_mode;  /*handshaking*/
  	enum intel_mid_dma_mode		cfg_mode; /*mode configuration*/

  	unsigned int		device_instance; /*0, 1 for periphral instance*/

  	struct dma_slave_config		dma_slave;

  };
  
  #endif /*__INTEL_MID_DMA_H__*/