/*

   * Copyright (C) 2007-2010 Freescale Semiconductor, Inc. All rights reserved.

   *
   * Author:
   *   Zhang Wei <wei.zhang@freescale.com>, Jul 2007
   *   Ebony Zhu <ebony.zhu@freescale.com>, May 2007
   *
   * This 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.
   *
   */
  #ifndef __DMA_FSLDMA_H
  #define __DMA_FSLDMA_H
  
  #include <linux/device.h>
  #include <linux/dmapool.h>
  #include <linux/dmaengine.h>
  
  /* Define data structures needed by Freescale
   * MPC8540 and MPC8349 DMA controller.
   */
  #define FSL_DMA_MR_CS		0x00000001
  #define FSL_DMA_MR_CC		0x00000002
  #define FSL_DMA_MR_CA		0x00000008
  #define FSL_DMA_MR_EIE		0x00000040
  #define FSL_DMA_MR_XFE		0x00000020
  #define FSL_DMA_MR_EOLNIE	0x00000100
  #define FSL_DMA_MR_EOLSIE	0x00000080
  #define FSL_DMA_MR_EOSIE	0x00000200
  #define FSL_DMA_MR_CDSM		0x00000010
  #define FSL_DMA_MR_CTM		0x00000004
  #define FSL_DMA_MR_EMP_EN	0x00200000
  #define FSL_DMA_MR_EMS_EN	0x00040000
  #define FSL_DMA_MR_DAHE		0x00002000
  #define FSL_DMA_MR_SAHE		0x00001000

  /*
   * Bandwidth/pause control determines how many bytes a given
   * channel is allowed to transfer before the DMA engine pauses
   * the current channel and switches to the next channel
   */
  #define FSL_DMA_MR_BWC         0x08000000

  /* Special MR definition for MPC8349 */
  #define FSL_DMA_MR_EOTIE	0x00000080

  #define FSL_DMA_MR_PRC_RM	0x00000800

  
  #define FSL_DMA_SR_CH		0x00000020

  #define FSL_DMA_SR_PE		0x00000010

  #define FSL_DMA_SR_CB		0x00000004
  #define FSL_DMA_SR_TE		0x00000080
  #define FSL_DMA_SR_EOSI		0x00000002
  #define FSL_DMA_SR_EOLSI	0x00000001
  #define FSL_DMA_SR_EOCDI	0x00000001
  #define FSL_DMA_SR_EOLNI	0x00000008
  
  #define FSL_DMA_SATR_SBPATMU			0x20000000
  #define FSL_DMA_SATR_STRANSINT_RIO		0x00c00000
  #define FSL_DMA_SATR_SREADTYPE_SNOOP_READ	0x00050000
  #define FSL_DMA_SATR_SREADTYPE_BP_IORH		0x00020000
  #define FSL_DMA_SATR_SREADTYPE_BP_NREAD		0x00040000
  #define FSL_DMA_SATR_SREADTYPE_BP_MREAD		0x00070000
  
  #define FSL_DMA_DATR_DBPATMU			0x20000000
  #define FSL_DMA_DATR_DTRANSINT_RIO		0x00c00000
  #define FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE	0x00050000
  #define FSL_DMA_DATR_DWRITETYPE_BP_FLUSH	0x00010000
  
  #define FSL_DMA_EOL		((u64)0x1)
  #define FSL_DMA_SNEN		((u64)0x10)
  #define FSL_DMA_EOSIE		0x8
  #define FSL_DMA_NLDA_MASK	(~(u64)0x1f)
  
  #define FSL_DMA_BCR_MAX_CNT	0x03ffffffu
  
  #define FSL_DMA_DGSR_TE		0x80
  #define FSL_DMA_DGSR_CH		0x20
  #define FSL_DMA_DGSR_PE		0x10
  #define FSL_DMA_DGSR_EOLNI	0x08
  #define FSL_DMA_DGSR_CB		0x04
  #define FSL_DMA_DGSR_EOSI	0x02
  #define FSL_DMA_DGSR_EOLSI	0x01

  typedef u64 __bitwise v64;
  typedef u32 __bitwise v32;

  struct fsl_dma_ld_hw {

  	v64 src_addr;
  	v64 dst_addr;
  	v64 next_ln_addr;
  	v32 count;
  	v32 reserve;

  } __attribute__((aligned(32)));
  
  struct fsl_desc_sw {
  	struct fsl_dma_ld_hw hw;
  	struct list_head node;

  	struct list_head tx_list;

  	struct dma_async_tx_descriptor async_tx;

  } __attribute__((aligned(32)));

  struct fsldma_chan_regs {

  	u32 mr;		/* 0x00 - Mode Register */
  	u32 sr;		/* 0x04 - Status Register */

  	u64 cdar;	/* 0x08 - Current descriptor address register */
  	u64 sar;	/* 0x10 - Source Address Register */
  	u64 dar;	/* 0x18 - Destination Address Register */
  	u32 bcr;	/* 0x20 - Byte Count Register */
  	u64 ndar;	/* 0x24 - Next Descriptor Address Register */

  };

  struct fsldma_chan;

  #define FSL_DMA_MAX_CHANS_PER_DEVICE 4

  struct fsldma_device {

  	void __iomem *regs;	/* DGSR register base */

  	struct device *dev;
  	struct dma_device common;

  	struct fsldma_chan *chan[FSL_DMA_MAX_CHANS_PER_DEVICE];

  	u32 feature;		/* The same as DMA channels */

  	int irq;		/* Channel IRQ */

  };

  /* Define macros for fsldma_chan->feature property */

  #define FSL_DMA_LITTLE_ENDIAN	0x00000000
  #define FSL_DMA_BIG_ENDIAN	0x00000001
  
  #define FSL_DMA_IP_MASK		0x00000ff0
  #define FSL_DMA_IP_85XX		0x00000010
  #define FSL_DMA_IP_83XX		0x00000020
  
  #define FSL_DMA_CHAN_PAUSE_EXT	0x00001000
  #define FSL_DMA_CHAN_START_EXT	0x00002000

  struct fsldma_chan {

  	char name[8];			/* Channel name */

  	struct fsldma_chan_regs __iomem *regs;

  	dma_cookie_t completed_cookie;	/* The maximum cookie completed */
  	spinlock_t desc_lock;		/* Descriptor operation lock */

  	struct list_head ld_pending;	/* Link descriptors queue */
  	struct list_head ld_running;	/* Link descriptors queue */

  	struct dma_chan common;		/* DMA common channel */
  	struct dma_pool *desc_pool;	/* Descriptors pool */
  	struct device *dev;		/* Channel device */

  	int irq;			/* Channel IRQ */
  	int id;				/* Raw id of this channel */
  	struct tasklet_struct tasklet;
  	u32 feature;

  	bool idle;			/* DMA controller is idle */

  	void (*toggle_ext_pause)(struct fsldma_chan *fsl_chan, int enable);
  	void (*toggle_ext_start)(struct fsldma_chan *fsl_chan, int enable);
  	void (*set_src_loop_size)(struct fsldma_chan *fsl_chan, int size);

  	void (*set_dst_loop_size)(struct fsldma_chan *fsl_chan, int size);

  	void (*set_request_count)(struct fsldma_chan *fsl_chan, int size);

  };

  #define to_fsl_chan(chan) container_of(chan, struct fsldma_chan, common)

  #define to_fsl_desc(lh) container_of(lh, struct fsl_desc_sw, node)
  #define tx_to_fsl_desc(tx) container_of(tx, struct fsl_desc_sw, async_tx)
  
  #ifndef __powerpc64__
  static u64 in_be64(const u64 __iomem *addr)
  {

  	return ((u64)in_be32((u32 __iomem *)addr) << 32) |
  		(in_be32((u32 __iomem *)addr + 1));

  }
  
  static void out_be64(u64 __iomem *addr, u64 val)
  {

  	out_be32((u32 __iomem *)addr, val >> 32);
  	out_be32((u32 __iomem *)addr + 1, (u32)val);

  }
  
  /* There is no asm instructions for 64 bits reverse loads and stores */
  static u64 in_le64(const u64 __iomem *addr)
  {

  	return ((u64)in_le32((u32 __iomem *)addr + 1) << 32) |
  		(in_le32((u32 __iomem *)addr));

  }
  
  static void out_le64(u64 __iomem *addr, u64 val)
  {

  	out_le32((u32 __iomem *)addr + 1, val >> 32);
  	out_le32((u32 __iomem *)addr, (u32)val);

  }
  #endif
  
  #define DMA_IN(fsl_chan, addr, width)					\
  		(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ?		\
  			in_be##width(addr) : in_le##width(addr))
  #define DMA_OUT(fsl_chan, addr, val, width)				\
  		(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ?		\
  			out_be##width(addr, val) : out_le##width(addr, val))
  
  #define DMA_TO_CPU(fsl_chan, d, width)					\
  		(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ?		\

  			be##width##_to_cpu((__force __be##width)(v##width)d) : \
  			le##width##_to_cpu((__force __le##width)(v##width)d))

  #define CPU_TO_DMA(fsl_chan, c, width)					\
  		(((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ?		\

  			(__force v##width)cpu_to_be##width(c) :		\
  			(__force v##width)cpu_to_le##width(c))

  
  #endif	/* __DMA_FSLDMA_H */