drivers/dma/fsl-edma-common.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright 2013-2014 Freescale Semiconductor, Inc.
  * Copyright 2018 Angelo Dureghello <angelo@sysam.it>
  */
 #ifndef _FSL_EDMA_COMMON_H_
 #define _FSL_EDMA_COMMON_H_

 #include <linux/dma-direction.h>
 #include <linux/platform_device.h>
 #include "virt-dma.h"

 #define EDMA_CR_EDBG		BIT(1)
 #define EDMA_CR_ERCA		BIT(2)
 #define EDMA_CR_ERGA		BIT(3)
 #define EDMA_CR_HOE		BIT(4)
 #define EDMA_CR_HALT		BIT(5)
 #define EDMA_CR_CLM		BIT(6)
 #define EDMA_CR_EMLM		BIT(7)
 #define EDMA_CR_ECX		BIT(16)
 #define EDMA_CR_CX		BIT(17)

 #define EDMA_SEEI_SEEI(x)	((x) & GENMASK(4, 0))
 #define EDMA_CEEI_CEEI(x)	((x) & GENMASK(4, 0))
 #define EDMA_CINT_CINT(x)	((x) & GENMASK(4, 0))
 #define EDMA_CERR_CERR(x)	((x) & GENMASK(4, 0))

 #define EDMA_TCD_ATTR_DSIZE(x)		(((x) & GENMASK(2, 0)))
 #define EDMA_TCD_ATTR_DMOD(x)		(((x) & GENMASK(4, 0)) << 3)
 #define EDMA_TCD_ATTR_SSIZE(x)		(((x) & GENMASK(2, 0)) << 8)
 #define EDMA_TCD_ATTR_SMOD(x)		(((x) & GENMASK(4, 0)) << 11)

 #define EDMA_TCD_CITER_CITER(x)		((x) & GENMASK(14, 0))
 #define EDMA_TCD_BITER_BITER(x)		((x) & GENMASK(14, 0))

 #define EDMA_TCD_CSR_START		BIT(0)
 #define EDMA_TCD_CSR_INT_MAJOR		BIT(1)
 #define EDMA_TCD_CSR_INT_HALF		BIT(2)
 #define EDMA_TCD_CSR_D_REQ		BIT(3)
 #define EDMA_TCD_CSR_E_SG		BIT(4)
 #define EDMA_TCD_CSR_E_LINK		BIT(5)
 #define EDMA_TCD_CSR_ACTIVE		BIT(6)
 #define EDMA_TCD_CSR_DONE		BIT(7)

 #define EDMA_V3_TCD_NBYTES_MLOFF_NBYTES(x) ((x) & GENMASK(9, 0))
 #define EDMA_V3_TCD_NBYTES_MLOFF(x)        (x << 10)
 #define EDMA_V3_TCD_NBYTES_DMLOE           (1 << 30)
 #define EDMA_V3_TCD_NBYTES_SMLOE           (1 << 31)

 #define EDMAMUX_CHCFG_DIS		0x0
 #define EDMAMUX_CHCFG_ENBL		0x80
 #define EDMAMUX_CHCFG_SOURCE(n)		((n) & 0x3F)

 #define DMAMUX_NR	2

 #define EDMA_TCD                0x1000

 #define FSL_EDMA_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))

 #define EDMA_V3_CH_SBR_RD          BIT(22)
 #define EDMA_V3_CH_SBR_WR          BIT(21)
 #define EDMA_V3_CH_CSR_ERQ         BIT(0)
 #define EDMA_V3_CH_CSR_EARQ        BIT(1)
 #define EDMA_V3_CH_CSR_EEI         BIT(2)
 #define EDMA_V3_CH_CSR_DONE        BIT(30)
 #define EDMA_V3_CH_CSR_ACTIVE      BIT(31)

 enum fsl_edma_pm_state {
 	RUNNING = 0,
 	SUSPENDED,
 };

 struct fsl_edma_hw_tcd {
 	__le32	saddr;
 	__le16	soff;
 	__le16	attr;
 	__le32	nbytes;
 	__le32	slast;
 	__le32	daddr;
 	__le16	doff;
 	__le16	citer;
 	__le32	dlast_sga;
 	__le16	csr;
 	__le16	biter;
 };

 struct fsl_edma3_ch_reg {
 	__le32	ch_csr;
 	__le32	ch_es;
 	__le32	ch_int;
 	__le32	ch_sbr;
 	__le32	ch_pri;
 	__le32	ch_mux;
 	__le32  ch_mattr; /* edma4, reserved for edma3 */
 	__le32  ch_reserved;
 	struct fsl_edma_hw_tcd tcd;
 } __packed;

 /*
  * These are iomem pointers, for both v32 and v64.
  */
 struct edma_regs {
 	void __iomem *cr;
 	void __iomem *es;
 	void __iomem *erqh;
 	void __iomem *erql;	/* aka erq on v32 */
 	void __iomem *eeih;
 	void __iomem *eeil;	/* aka eei on v32 */
 	void __iomem *seei;
 	void __iomem *ceei;
 	void __iomem *serq;
 	void __iomem *cerq;
 	void __iomem *cint;
 	void __iomem *cerr;
 	void __iomem *ssrt;
 	void __iomem *cdne;
 	void __iomem *inth;
 	void __iomem *intl;
 	void __iomem *errh;
 	void __iomem *errl;
 };

 struct fsl_edma_sw_tcd {
 	dma_addr_t			ptcd;
 	struct fsl_edma_hw_tcd		*vtcd;
 };

 struct fsl_edma_chan {
 	struct virt_dma_chan		vchan;
 	enum dma_status			status;
 	enum fsl_edma_pm_state		pm_state;
 	bool				idle;
 	u32				slave_id;
 	struct fsl_edma_engine		*edma;
 	struct fsl_edma_desc		*edesc;
 	struct dma_slave_config		cfg;
 	u32				attr;
 	bool                            is_sw;
 	struct dma_pool			*tcd_pool;
 	dma_addr_t			dma_dev_addr;
 	u32				dma_dev_size;
 	enum dma_data_direction		dma_dir;
 	char				chan_name[32];
 	struct fsl_edma_hw_tcd __iomem *tcd;
 	u32				real_count;
 	struct work_struct		issue_worker;
 	struct platform_device		*pdev;
 	struct device			*pd_dev;
 	u32				srcid;
 	struct clk			*clk;
 	int                             priority;
 	int				hw_chanid;
 	int				txirq;
 	bool				is_rxchan;
 	bool				is_remote;
 	bool				is_multi_fifo;
 };

 struct fsl_edma_desc {
 	struct virt_dma_desc		vdesc;
 	struct fsl_edma_chan		*echan;
 	bool				iscyclic;
 	enum dma_transfer_direction	dirn;
 	unsigned int			n_tcds;
 	struct fsl_edma_sw_tcd		tcd[];
 };

 #define FSL_EDMA_DRV_HAS_DMACLK		BIT(0)
 #define FSL_EDMA_DRV_MUX_SWAP		BIT(1)
 #define FSL_EDMA_DRV_CONFIG32		BIT(2)
 #define FSL_EDMA_DRV_WRAP_IO		BIT(3)
 #define FSL_EDMA_DRV_EDMA64		BIT(4)
 #define FSL_EDMA_DRV_HAS_PD		BIT(5)
 #define FSL_EDMA_DRV_HAS_CHCLK		BIT(6)
 #define FSL_EDMA_DRV_HAS_CHMUX		BIT(7)
 /* imx8 QM audio edma remote local swapped */
 #define FSL_EDMA_DRV_QUIRK_SWAPPED	BIT(8)
 /* control and status register is in tcd address space, edma3 reg layout */
 #define FSL_EDMA_DRV_SPLIT_REG		BIT(9)
 #define FSL_EDMA_DRV_BUS_8BYTE		BIT(10)
 #define FSL_EDMA_DRV_DEV_TO_DEV		BIT(11)
 #define FSL_EDMA_DRV_ALIGN_64BYTE	BIT(12)
 /* Need clean CHn_CSR DONE before enable TCD's ESG */
 #define FSL_EDMA_DRV_CLEAR_DONE_E_SG	BIT(13)
 /* Need clean CHn_CSR DONE before enable TCD's MAJORELINK */
 #define FSL_EDMA_DRV_CLEAR_DONE_E_LINK	BIT(14)

 #define FSL_EDMA_DRV_EDMA3	(FSL_EDMA_DRV_SPLIT_REG |	\
 				 FSL_EDMA_DRV_BUS_8BYTE |	\
 				 FSL_EDMA_DRV_DEV_TO_DEV |	\
 				 FSL_EDMA_DRV_ALIGN_64BYTE |	\
 				 FSL_EDMA_DRV_CLEAR_DONE_E_SG |	\
 				 FSL_EDMA_DRV_CLEAR_DONE_E_LINK)

 #define FSL_EDMA_DRV_EDMA4	(FSL_EDMA_DRV_SPLIT_REG |	\
 				 FSL_EDMA_DRV_BUS_8BYTE |	\
 				 FSL_EDMA_DRV_DEV_TO_DEV |	\
 				 FSL_EDMA_DRV_ALIGN_64BYTE |	\
 				 FSL_EDMA_DRV_CLEAR_DONE_E_LINK)

 struct fsl_edma_drvdata {
 	u32			dmamuxs; /* only used before v3 */
 	u32			chreg_off;
 	u32			chreg_space_sz;
 	u32			flags;
 	int			(*setup_irq)(struct platform_device *pdev,
 					     struct fsl_edma_engine *fsl_edma);
 };

 struct fsl_edma_engine {
 	struct dma_device	dma_dev;
 	void __iomem		*membase;
 	void __iomem		*muxbase[DMAMUX_NR];
 	struct clk		*muxclk[DMAMUX_NR];
 	struct clk		*dmaclk;
 	struct clk		*chclk;
 	struct mutex		fsl_edma_mutex;
 	const struct fsl_edma_drvdata *drvdata;
 	u32			n_chans;
 	int			txirq;
 	int			errirq;
 	bool			big_endian;
 	struct edma_regs	regs;
 	u64			chan_masked;
 	struct fsl_edma_chan	chans[];
 };

 #define edma_read_tcdreg(chan, __name)				\
 (sizeof(chan->tcd->__name) == sizeof(u32) ?			\
 	edma_readl(chan->edma, &chan->tcd->__name) :		\
 	edma_readw(chan->edma, &chan->tcd->__name))

 #define edma_write_tcdreg(chan, val, __name)			\
 (sizeof(chan->tcd->__name) == sizeof(u32) ?			\
 	edma_writel(chan->edma, (u32 __force)val, &chan->tcd->__name) :	\
 	edma_writew(chan->edma, (u16 __force)val, &chan->tcd->__name))

 #define edma_readl_chreg(chan, __name)				\
 	edma_readl(chan->edma,					\
 		   (void __iomem *)&(container_of(chan->tcd, struct fsl_edma3_ch_reg, tcd)->__name))

 #define edma_writel_chreg(chan, val,  __name)			\
 	edma_writel(chan->edma, val,				\
 		   (void __iomem *)&(container_of(chan->tcd, struct fsl_edma3_ch_reg, tcd)->__name))

 /*
  * R/W functions for big- or little-endian registers:
  * The eDMA controller's endian is independent of the CPU core's endian.
  * For the big-endian IP module, the offset for 8-bit or 16-bit registers
  * should also be swapped opposite to that in little-endian IP.
  */
 static inline u32 edma_readl(struct fsl_edma_engine *edma, void __iomem *addr)
 {
 	if (edma->big_endian)
 		return ioread32be(addr);
 	else
 		return ioread32(addr);
 }

 static inline u16 edma_readw(struct fsl_edma_engine *edma, void __iomem *addr)
 {
 	if (edma->big_endian)
 		return ioread16be(addr);
 	else
 		return ioread16(addr);
 }

 static inline void edma_writeb(struct fsl_edma_engine *edma,
 			       u8 val, void __iomem *addr)
 {
 	/* swap the reg offset for these in big-endian mode */
 	if (edma->big_endian)
 		iowrite8(val, (void __iomem *)((unsigned long)addr ^ 0x3));
 	else
 		iowrite8(val, addr);
 }

 static inline void edma_writew(struct fsl_edma_engine *edma,
 			       u16 val, void __iomem *addr)
 {
 	/* swap the reg offset for these in big-endian mode */
 	if (edma->big_endian)
 		iowrite16be(val, (void __iomem *)((unsigned long)addr ^ 0x2));
 	else
 		iowrite16(val, addr);
 }

 static inline void edma_writel(struct fsl_edma_engine *edma,
 			       u32 val, void __iomem *addr)
 {
 	if (edma->big_endian)
 		iowrite32be(val, addr);
 	else
 		iowrite32(val, addr);
 }

 static inline struct fsl_edma_chan *to_fsl_edma_chan(struct dma_chan *chan)
 {
 	return container_of(chan, struct fsl_edma_chan, vchan.chan);
 }

 static inline u32 fsl_edma_drvflags(struct fsl_edma_chan *fsl_chan)
 {
 	return fsl_chan->edma->drvdata->flags;
 }

 static inline struct fsl_edma_desc *to_fsl_edma_desc(struct virt_dma_desc *vd)
 {
 	return container_of(vd, struct fsl_edma_desc, vdesc);
 }

 static inline void fsl_edma_err_chan_handler(struct fsl_edma_chan *fsl_chan)
 {
 	fsl_chan->status = DMA_ERROR;
 	fsl_chan->idle = true;
 }

 void fsl_edma_tx_chan_handler(struct fsl_edma_chan *fsl_chan);
 void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan);
 void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
 			unsigned int slot, bool enable);
 void fsl_edma_free_desc(struct virt_dma_desc *vdesc);
 int fsl_edma_terminate_all(struct dma_chan *chan);
 int fsl_edma_pause(struct dma_chan *chan);
 int fsl_edma_resume(struct dma_chan *chan);
 int fsl_edma_slave_config(struct dma_chan *chan,
 				 struct dma_slave_config *cfg);
 enum dma_status fsl_edma_tx_status(struct dma_chan *chan,
 		dma_cookie_t cookie, struct dma_tx_state *txstate);
 struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic(
 		struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
 		size_t period_len, enum dma_transfer_direction direction,
 		unsigned long flags);
 struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg(
 		struct dma_chan *chan, struct scatterlist *sgl,
 		unsigned int sg_len, enum dma_transfer_direction direction,
 		unsigned long flags, void *context);
 struct dma_async_tx_descriptor *fsl_edma_prep_memcpy(
 		struct dma_chan *chan, dma_addr_t dma_dst, dma_addr_t dma_src,
 		size_t len, unsigned long flags);
 void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan);
 void fsl_edma_issue_pending(struct dma_chan *chan);
 int fsl_edma_alloc_chan_resources(struct dma_chan *chan);
 void fsl_edma_free_chan_resources(struct dma_chan *chan);
 void fsl_edma_cleanup_vchan(struct dma_device *dmadev);
 void fsl_edma_setup_regs(struct fsl_edma_engine *edma);

 #endif /* _FSL_EDMA_COMMON_H_ */
	/* SPDX-License-Identifier: GPL-2.0+ */
	/*
	* Copyright 2013-2014 Freescale Semiconductor, Inc.
	* Copyright 2018 Angelo Dureghello <angelo@sysam.it>
	*/
	#ifndef _FSL_EDMA_COMMON_H_
	#define _FSL_EDMA_COMMON_H_

	#include <linux/dma-direction.h>
	#include <linux/platform_device.h>
	#include "virt-dma.h"

	#define EDMA_CR_EDBG BIT(1)
	#define EDMA_CR_ERCA BIT(2)
	#define EDMA_CR_ERGA BIT(3)
	#define EDMA_CR_HOE BIT(4)
	#define EDMA_CR_HALT BIT(5)
	#define EDMA_CR_CLM BIT(6)
	#define EDMA_CR_EMLM BIT(7)
	#define EDMA_CR_ECX BIT(16)
	#define EDMA_CR_CX BIT(17)

	#define EDMA_SEEI_SEEI(x) ((x) & GENMASK(4, 0))
	#define EDMA_CEEI_CEEI(x) ((x) & GENMASK(4, 0))
	#define EDMA_CINT_CINT(x) ((x) & GENMASK(4, 0))
	#define EDMA_CERR_CERR(x) ((x) & GENMASK(4, 0))

	#define EDMA_TCD_ATTR_DSIZE(x) (((x) & GENMASK(2, 0)))
	#define EDMA_TCD_ATTR_DMOD(x) (((x) & GENMASK(4, 0)) << 3)
	#define EDMA_TCD_ATTR_SSIZE(x) (((x) & GENMASK(2, 0)) << 8)
	#define EDMA_TCD_ATTR_SMOD(x) (((x) & GENMASK(4, 0)) << 11)

	#define EDMA_TCD_CITER_CITER(x) ((x) & GENMASK(14, 0))
	#define EDMA_TCD_BITER_BITER(x) ((x) & GENMASK(14, 0))

	#define EDMA_TCD_CSR_START BIT(0)
	#define EDMA_TCD_CSR_INT_MAJOR BIT(1)
	#define EDMA_TCD_CSR_INT_HALF BIT(2)
	#define EDMA_TCD_CSR_D_REQ BIT(3)
	#define EDMA_TCD_CSR_E_SG BIT(4)
	#define EDMA_TCD_CSR_E_LINK BIT(5)
	#define EDMA_TCD_CSR_ACTIVE BIT(6)
	#define EDMA_TCD_CSR_DONE BIT(7)

	#define EDMA_V3_TCD_NBYTES_MLOFF_NBYTES(x) ((x) & GENMASK(9, 0))
	#define EDMA_V3_TCD_NBYTES_MLOFF(x) (x << 10)
	#define EDMA_V3_TCD_NBYTES_DMLOE (1 << 30)
	#define EDMA_V3_TCD_NBYTES_SMLOE (1 << 31)

	#define EDMAMUX_CHCFG_DIS 0x0
	#define EDMAMUX_CHCFG_ENBL 0x80
	#define EDMAMUX_CHCFG_SOURCE(n) ((n) & 0x3F)

	#define DMAMUX_NR 2

	#define EDMA_TCD 0x1000

	#define FSL_EDMA_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))

	#define EDMA_V3_CH_SBR_RD BIT(22)
	#define EDMA_V3_CH_SBR_WR BIT(21)
	#define EDMA_V3_CH_CSR_ERQ BIT(0)
	#define EDMA_V3_CH_CSR_EARQ BIT(1)
	#define EDMA_V3_CH_CSR_EEI BIT(2)
	#define EDMA_V3_CH_CSR_DONE BIT(30)
	#define EDMA_V3_CH_CSR_ACTIVE BIT(31)

	enum fsl_edma_pm_state {
	RUNNING = 0,
	SUSPENDED,
	};

	struct fsl_edma_hw_tcd {
	__le32 saddr;
	__le16 soff;
	__le16 attr;
	__le32 nbytes;
	__le32 slast;
	__le32 daddr;
	__le16 doff;
	__le16 citer;
	__le32 dlast_sga;
	__le16 csr;
	__le16 biter;
	};

	struct fsl_edma3_ch_reg {
	__le32 ch_csr;
	__le32 ch_es;
	__le32 ch_int;
	__le32 ch_sbr;
	__le32 ch_pri;
	__le32 ch_mux;
	__le32 ch_mattr; /* edma4, reserved for edma3 */
	__le32 ch_reserved;
	struct fsl_edma_hw_tcd tcd;
	} __packed;

	/*
	* These are iomem pointers, for both v32 and v64.
	*/
	struct edma_regs {
	void __iomem *cr;
	void __iomem *es;
	void __iomem *erqh;
	void __iomem erql; / aka erq on v32 */
	void __iomem *eeih;
	void __iomem eeil; / aka eei on v32 */
	void __iomem *seei;
	void __iomem *ceei;
	void __iomem *serq;
	void __iomem *cerq;
	void __iomem *cint;
	void __iomem *cerr;
	void __iomem *ssrt;
	void __iomem *cdne;
	void __iomem *inth;
	void __iomem *intl;
	void __iomem *errh;
	void __iomem *errl;
	};

	struct fsl_edma_sw_tcd {
	dma_addr_t ptcd;
	struct fsl_edma_hw_tcd *vtcd;
	};

	struct fsl_edma_chan {
	struct virt_dma_chan vchan;
	enum dma_status status;
	enum fsl_edma_pm_state pm_state;
	bool idle;
	u32 slave_id;
	struct fsl_edma_engine *edma;
	struct fsl_edma_desc *edesc;
	struct dma_slave_config cfg;
	u32 attr;
	bool is_sw;
	struct dma_pool *tcd_pool;
	dma_addr_t dma_dev_addr;
	u32 dma_dev_size;
	enum dma_data_direction dma_dir;
	char chan_name[32];
	struct fsl_edma_hw_tcd __iomem *tcd;
	u32 real_count;
	struct work_struct issue_worker;
	struct platform_device *pdev;
	struct device *pd_dev;
	u32 srcid;
	struct clk *clk;
	int priority;
	int hw_chanid;
	int txirq;
	bool is_rxchan;
	bool is_remote;
	bool is_multi_fifo;
	};

	struct fsl_edma_desc {
	struct virt_dma_desc vdesc;
	struct fsl_edma_chan *echan;
	bool iscyclic;
	enum dma_transfer_direction dirn;
	unsigned int n_tcds;
	struct fsl_edma_sw_tcd tcd[];
	};

	#define FSL_EDMA_DRV_HAS_DMACLK BIT(0)
	#define FSL_EDMA_DRV_MUX_SWAP BIT(1)
	#define FSL_EDMA_DRV_CONFIG32 BIT(2)
	#define FSL_EDMA_DRV_WRAP_IO BIT(3)
	#define FSL_EDMA_DRV_EDMA64 BIT(4)
	#define FSL_EDMA_DRV_HAS_PD BIT(5)
	#define FSL_EDMA_DRV_HAS_CHCLK BIT(6)
	#define FSL_EDMA_DRV_HAS_CHMUX BIT(7)
	/* imx8 QM audio edma remote local swapped */
	#define FSL_EDMA_DRV_QUIRK_SWAPPED BIT(8)
	/* control and status register is in tcd address space, edma3 reg layout */
	#define FSL_EDMA_DRV_SPLIT_REG BIT(9)
	#define FSL_EDMA_DRV_BUS_8BYTE BIT(10)
	#define FSL_EDMA_DRV_DEV_TO_DEV BIT(11)
	#define FSL_EDMA_DRV_ALIGN_64BYTE BIT(12)
	/* Need clean CHn_CSR DONE before enable TCD's ESG */
	#define FSL_EDMA_DRV_CLEAR_DONE_E_SG BIT(13)
	/* Need clean CHn_CSR DONE before enable TCD's MAJORELINK */
	#define FSL_EDMA_DRV_CLEAR_DONE_E_LINK BIT(14)

	#define FSL_EDMA_DRV_EDMA3 (FSL_EDMA_DRV_SPLIT_REG \| \
	FSL_EDMA_DRV_BUS_8BYTE \| \
	FSL_EDMA_DRV_DEV_TO_DEV \| \
	FSL_EDMA_DRV_ALIGN_64BYTE \| \
	FSL_EDMA_DRV_CLEAR_DONE_E_SG \| \
	FSL_EDMA_DRV_CLEAR_DONE_E_LINK)

	#define FSL_EDMA_DRV_EDMA4 (FSL_EDMA_DRV_SPLIT_REG \| \
	FSL_EDMA_DRV_BUS_8BYTE \| \
	FSL_EDMA_DRV_DEV_TO_DEV \| \
	FSL_EDMA_DRV_ALIGN_64BYTE \| \
	FSL_EDMA_DRV_CLEAR_DONE_E_LINK)

	struct fsl_edma_drvdata {
	u32 dmamuxs; /* only used before v3 */
	u32 chreg_off;
	u32 chreg_space_sz;
	u32 flags;
	int (setup_irq)(struct platform_device pdev,
	struct fsl_edma_engine *fsl_edma);
	};

	struct fsl_edma_engine {
	struct dma_device dma_dev;
	void __iomem *membase;
	void __iomem *muxbase[DMAMUX_NR];
	struct clk *muxclk[DMAMUX_NR];
	struct clk *dmaclk;
	struct clk *chclk;
	struct mutex fsl_edma_mutex;
	const struct fsl_edma_drvdata *drvdata;
	u32 n_chans;
	int txirq;
	int errirq;
	bool big_endian;
	struct edma_regs regs;
	u64 chan_masked;
	struct fsl_edma_chan chans[];
	};

	#define edma_read_tcdreg(chan, __name) \
	(sizeof(chan->tcd->__name) == sizeof(u32) ? \
	edma_readl(chan->edma, &chan->tcd->__name) : \
	edma_readw(chan->edma, &chan->tcd->__name))

	#define edma_write_tcdreg(chan, val, __name) \
	(sizeof(chan->tcd->__name) == sizeof(u32) ? \
	edma_writel(chan->edma, (u32 __force)val, &chan->tcd->__name) : \
	edma_writew(chan->edma, (u16 __force)val, &chan->tcd->__name))

	#define edma_readl_chreg(chan, __name) \
	edma_readl(chan->edma, \
	(void __iomem *)&(container_of(chan->tcd, struct fsl_edma3_ch_reg, tcd)->__name))

	#define edma_writel_chreg(chan, val, __name) \
	edma_writel(chan->edma, val, \
	(void __iomem *)&(container_of(chan->tcd, struct fsl_edma3_ch_reg, tcd)->__name))

	/*
	* R/W functions for big- or little-endian registers:
	* The eDMA controller's endian is independent of the CPU core's endian.
	* For the big-endian IP module, the offset for 8-bit or 16-bit registers
	* should also be swapped opposite to that in little-endian IP.
	*/
	static inline u32 edma_readl(struct fsl_edma_engine edma, void __iomem addr)
	{
	if (edma->big_endian)
	return ioread32be(addr);
	else
	return ioread32(addr);
	}

	static inline u16 edma_readw(struct fsl_edma_engine edma, void __iomem addr)
	{
	if (edma->big_endian)
	return ioread16be(addr);
	else
	return ioread16(addr);
	}

	static inline void edma_writeb(struct fsl_edma_engine *edma,
	u8 val, void __iomem *addr)
	{
	/* swap the reg offset for these in big-endian mode */
	if (edma->big_endian)
	iowrite8(val, (void __iomem *)((unsigned long)addr ^ 0x3));
	else
	iowrite8(val, addr);
	}

	static inline void edma_writew(struct fsl_edma_engine *edma,
	u16 val, void __iomem *addr)
	{
	/* swap the reg offset for these in big-endian mode */
	if (edma->big_endian)
	iowrite16be(val, (void __iomem *)((unsigned long)addr ^ 0x2));
	else
	iowrite16(val, addr);
	}

	static inline void edma_writel(struct fsl_edma_engine *edma,
	u32 val, void __iomem *addr)
	{
	if (edma->big_endian)
	iowrite32be(val, addr);
	else
	iowrite32(val, addr);
	}

	static inline struct fsl_edma_chan to_fsl_edma_chan(struct dma_chan chan)
	{
	return container_of(chan, struct fsl_edma_chan, vchan.chan);
	}

	static inline u32 fsl_edma_drvflags(struct fsl_edma_chan *fsl_chan)
	{
	return fsl_chan->edma->drvdata->flags;
	}

	static inline struct fsl_edma_desc to_fsl_edma_desc(struct virt_dma_desc vd)
	{
	return container_of(vd, struct fsl_edma_desc, vdesc);
	}

	static inline void fsl_edma_err_chan_handler(struct fsl_edma_chan *fsl_chan)
	{
	fsl_chan->status = DMA_ERROR;
	fsl_chan->idle = true;
	}

	void fsl_edma_tx_chan_handler(struct fsl_edma_chan *fsl_chan);
	void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan);
	void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
	unsigned int slot, bool enable);
	void fsl_edma_free_desc(struct virt_dma_desc *vdesc);
	int fsl_edma_terminate_all(struct dma_chan *chan);
	int fsl_edma_pause(struct dma_chan *chan);
	int fsl_edma_resume(struct dma_chan *chan);
	int fsl_edma_slave_config(struct dma_chan *chan,
	struct dma_slave_config *cfg);
	enum dma_status fsl_edma_tx_status(struct dma_chan *chan,
	dma_cookie_t cookie, struct dma_tx_state *txstate);
	struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic(
	struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len,
	size_t period_len, enum dma_transfer_direction direction,
	unsigned long flags);
	struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg(
	struct dma_chan chan, struct scatterlist sgl,
	unsigned int sg_len, enum dma_transfer_direction direction,
	unsigned long flags, void *context);
	struct dma_async_tx_descriptor *fsl_edma_prep_memcpy(
	struct dma_chan *chan, dma_addr_t dma_dst, dma_addr_t dma_src,
	size_t len, unsigned long flags);
	void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan);
	void fsl_edma_issue_pending(struct dma_chan *chan);
	int fsl_edma_alloc_chan_resources(struct dma_chan *chan);
	void fsl_edma_free_chan_resources(struct dma_chan *chan);
	void fsl_edma_cleanup_vchan(struct dma_device *dmadev);
	void fsl_edma_setup_regs(struct fsl_edma_engine *edma);

	#endif /* _FSL_EDMA_COMMON_H_ */