/*
   * Copyright (C) 2010-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   *
   * 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; either version 2 of the License, or
   * (at your option) any later version.
   *
   * 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 _PXP_DMA
  #define _PXP_DMA
  
  #include <uapi/linux/pxp_dma.h>
  
  struct pxp_tx_desc {
  	struct dma_async_tx_descriptor txd;
  	struct list_head tx_list;
  	struct list_head list;
  	int len;
  	union {
  		struct pxp_layer_param s0_param;
  		struct pxp_layer_param out_param;
  		struct pxp_layer_param ol_param;
  	} layer_param;
  	struct pxp_proc_data proc_data;
  
  	u32 hist_status;	/* Histogram output status */
  
  	struct pxp_tx_desc *next;
  };
  
  struct pxp_channel {
  	struct dma_chan dma_chan;
  	dma_cookie_t completed;	/* last completed cookie */
  	enum pxp_channel_status status;
  	void *client;		/* Only one client per channel */
  	unsigned int n_tx_desc;
  	struct pxp_tx_desc *desc;	/* allocated tx-descriptors */
  	struct list_head queue;	/* queued tx-descriptors */
  	struct list_head list;	/* track queued channel number */
  	spinlock_t lock;	/* protects sg[0,1], queue,
  				 * status, cookie, free_list
  				 */
  	int active_buffer;
  	unsigned int eof_irq;
  	char eof_name[16];	/* EOF IRQ name for request_irq()  */
  };
  
  #define to_tx_desc(tx) container_of(tx, struct pxp_tx_desc, txd)
  #define to_pxp_channel(d) container_of(d, struct pxp_channel, dma_chan)
  
  void pxp_txd_ack(struct dma_async_tx_descriptor *txd,
  		 struct pxp_channel *pxp_chan);
  
  #ifdef CONFIG_MXC_PXP_CLIENT_DEVICE
  int register_pxp_device(void);
  void unregister_pxp_device(void);
  #else
  int register_pxp_device(void) { return 0; }
  void unregister_pxp_device(void) {}
  #endif
  
  #endif