drivers/dma/fsldma.h - arm/linux - Git at Google

 /*
  * 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

 #define FSL_DMA_MR_SAHTS_MASK	0x0000C000
 #define FSL_DMA_MR_DAHTS_MASK	0x00030000
 #define FSL_DMA_MR_BWC_MASK	0x0f000000

 /*
  * 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         0x0A000000

 /* 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

 #define FSL_DMA_BUSWIDTHS	(BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
 				BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
 				BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
 				BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
 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 8

 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

 #ifdef CONFIG_PM
 struct fsldma_chan_regs_save {
 	u32 mr;
 };

 enum fsldma_pm_state {
 	RUNNING = 0,
 	SUSPENDED,
 };
 #endif

 struct fsldma_chan {
 	char name[8];			/* Channel name */
 	struct fsldma_chan_regs __iomem *regs;
 	spinlock_t desc_lock;		/* Descriptor operation lock */
 	/*
 	 * Descriptors which are queued to run, but have not yet been
 	 * submitted to the hardware for execution
 	 */
 	struct list_head ld_pending;
 	/*
 	 * Descriptors which are currently being executed by the hardware
 	 */
 	struct list_head ld_running;
 	/*
 	 * Descriptors which have finished execution by the hardware. These
 	 * descriptors have already had their cleanup actions run. They are
 	 * waiting for the ACK bit to be set by the async_tx API.
 	 */
 	struct list_head ld_completed;	/* 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 */
 #ifdef CONFIG_PM
 	struct fsldma_chan_regs_save regs_save;
 	enum fsldma_pm_state pm_state;
 #endif

 	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 */
	/*
	* 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

	#define FSL_DMA_MR_SAHTS_MASK 0x0000C000
	#define FSL_DMA_MR_DAHTS_MASK 0x00030000
	#define FSL_DMA_MR_BWC_MASK 0x0f000000

	/*
	* 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 0x0A000000

	/* 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

	#define FSL_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) \| \
	BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) \| \
	BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) \| \
	BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
	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 8

	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

	#ifdef CONFIG_PM
	struct fsldma_chan_regs_save {
	u32 mr;
	};

	enum fsldma_pm_state {
	RUNNING = 0,
	SUSPENDED,
	};
	#endif

	struct fsldma_chan {
	char name[8]; /* Channel name */
	struct fsldma_chan_regs __iomem *regs;
	spinlock_t desc_lock; /* Descriptor operation lock */
	/*
	* Descriptors which are queued to run, but have not yet been
	* submitted to the hardware for execution
	*/
	struct list_head ld_pending;
	/*
	* Descriptors which are currently being executed by the hardware
	*/
	struct list_head ld_running;
	/*
	* Descriptors which have finished execution by the hardware. These
	* descriptors have already had their cleanup actions run. They are
	* waiting for the ACK bit to be set by the async_tx API.
	*/
	struct list_head ld_completed; /* 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 */
	#ifdef CONFIG_PM
	struct fsldma_chan_regs_save regs_save;
	enum fsldma_pm_state pm_state;
	#endif

	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 */