drivers/mmc/host/mmci.h - arm/linux - Git at Google

 /*
  *  linux/drivers/mmc/host/mmci.h - ARM PrimeCell MMCI PL180/1 driver
  *
  *  Copyright (C) 2003 Deep Blue Solutions, Ltd, 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 version 2 as
  * published by the Free Software Foundation.
  */
 #define MMCIPOWER		0x000
 #define MCI_PWR_OFF		0x00
 #define MCI_PWR_UP		0x02
 #define MCI_PWR_ON		0x03
 #define MCI_OD			(1 << 6)
 #define MCI_ROD			(1 << 7)
 /*
  * The ST Micro version does not have ROD and reuse the voltage registers for
  * direction settings.
  */
 #define MCI_ST_DATA2DIREN	(1 << 2)
 #define MCI_ST_CMDDIREN		(1 << 3)
 #define MCI_ST_DATA0DIREN	(1 << 4)
 #define MCI_ST_DATA31DIREN	(1 << 5)
 #define MCI_ST_FBCLKEN		(1 << 7)
 #define MCI_ST_DATA74DIREN	(1 << 8)

 #define MMCICLOCK		0x004
 #define MCI_CLK_ENABLE		(1 << 8)
 #define MCI_CLK_PWRSAVE		(1 << 9)
 #define MCI_CLK_BYPASS		(1 << 10)
 #define MCI_4BIT_BUS		(1 << 11)
 /*
  * 8bit wide buses, hardware flow contronl, negative edges and clock inversion
  * supported in ST Micro U300 and Ux500 versions
  */
 #define MCI_ST_8BIT_BUS		(1 << 12)
 #define MCI_ST_U300_HWFCEN	(1 << 13)
 #define MCI_ST_UX500_NEG_EDGE	(1 << 13)
 #define MCI_ST_UX500_HWFCEN	(1 << 14)
 #define MCI_ST_UX500_CLK_INV	(1 << 15)
 /* Modified PL180 on Versatile Express platform */
 #define MCI_ARM_HWFCEN		(1 << 12)

 /* Modified on Qualcomm Integrations */
 #define MCI_QCOM_CLK_WIDEBUS_8	(BIT(10) | BIT(11))
 #define MCI_QCOM_CLK_FLOWENA	BIT(12)
 #define MCI_QCOM_CLK_INVERTOUT	BIT(13)

 /* select in latch data and command in */
 #define MCI_QCOM_CLK_SELECT_IN_FBCLK	BIT(15)
 #define MCI_QCOM_CLK_SELECT_IN_DDR_MODE	(BIT(14) | BIT(15))

 #define MMCIARGUMENT		0x008

 /* The command register controls the Command Path State Machine (CPSM) */
 #define MMCICOMMAND		0x00c
 #define MCI_CPSM_RESPONSE	BIT(6)
 #define MCI_CPSM_LONGRSP	BIT(7)
 #define MCI_CPSM_INTERRUPT	BIT(8)
 #define MCI_CPSM_PENDING	BIT(9)
 #define MCI_CPSM_ENABLE		BIT(10)
 /* Command register flag extenstions in the ST Micro versions */
 #define MCI_CPSM_ST_SDIO_SUSP		BIT(11)
 #define MCI_CPSM_ST_ENCMD_COMPL		BIT(12)
 #define MCI_CPSM_ST_NIEN		BIT(13)
 #define MCI_CPSM_ST_CE_ATACMD		BIT(14)
 /* Command register flag extensions in the Qualcomm versions */
 #define MCI_CPSM_QCOM_PROGENA		BIT(11)
 #define MCI_CPSM_QCOM_DATCMD		BIT(12)
 #define MCI_CPSM_QCOM_MCIABORT		BIT(13)
 #define MCI_CPSM_QCOM_CCSENABLE		BIT(14)
 #define MCI_CPSM_QCOM_CCSDISABLE	BIT(15)
 #define MCI_CPSM_QCOM_AUTO_CMD19	BIT(16)
 #define MCI_CPSM_QCOM_AUTO_CMD21	BIT(21)

 #define MMCIRESPCMD		0x010
 #define MMCIRESPONSE0		0x014
 #define MMCIRESPONSE1		0x018
 #define MMCIRESPONSE2		0x01c
 #define MMCIRESPONSE3		0x020
 #define MMCIDATATIMER		0x024
 #define MMCIDATALENGTH		0x028

 /* The data control register controls the Data Path State Machine (DPSM) */
 #define MMCIDATACTRL		0x02c
 #define MCI_DPSM_ENABLE		BIT(0)
 #define MCI_DPSM_DIRECTION	BIT(1)
 #define MCI_DPSM_MODE		BIT(2)
 #define MCI_DPSM_DMAENABLE	BIT(3)
 #define MCI_DPSM_BLOCKSIZE	BIT(4)
 /* Control register extensions in the ST Micro U300 and Ux500 versions */
 #define MCI_DPSM_ST_RWSTART	BIT(8)
 #define MCI_DPSM_ST_RWSTOP	BIT(9)
 #define MCI_DPSM_ST_RWMOD	BIT(10)
 #define MCI_DPSM_ST_SDIOEN	BIT(11)
 /* Control register extensions in the ST Micro Ux500 versions */
 #define MCI_DPSM_ST_DMAREQCTL	BIT(12)
 #define MCI_DPSM_ST_DBOOTMODEEN	BIT(13)
 #define MCI_DPSM_ST_BUSYMODE	BIT(14)
 #define MCI_DPSM_ST_DDRMODE	BIT(15)
 /* Control register extensions in the Qualcomm versions */
 #define MCI_DPSM_QCOM_DATA_PEND	BIT(17)
 #define MCI_DPSM_QCOM_RX_DATA_PEND BIT(20)

 #define MMCIDATACNT		0x030
 #define MMCISTATUS		0x034
 #define MCI_CMDCRCFAIL		(1 << 0)
 #define MCI_DATACRCFAIL		(1 << 1)
 #define MCI_CMDTIMEOUT		(1 << 2)
 #define MCI_DATATIMEOUT		(1 << 3)
 #define MCI_TXUNDERRUN		(1 << 4)
 #define MCI_RXOVERRUN		(1 << 5)
 #define MCI_CMDRESPEND		(1 << 6)
 #define MCI_CMDSENT		(1 << 7)
 #define MCI_DATAEND		(1 << 8)
 #define MCI_STARTBITERR		(1 << 9)
 #define MCI_DATABLOCKEND	(1 << 10)
 #define MCI_CMDACTIVE		(1 << 11)
 #define MCI_TXACTIVE		(1 << 12)
 #define MCI_RXACTIVE		(1 << 13)
 #define MCI_TXFIFOHALFEMPTY	(1 << 14)
 #define MCI_RXFIFOHALFFULL	(1 << 15)
 #define MCI_TXFIFOFULL		(1 << 16)
 #define MCI_RXFIFOFULL		(1 << 17)
 #define MCI_TXFIFOEMPTY		(1 << 18)
 #define MCI_RXFIFOEMPTY		(1 << 19)
 #define MCI_TXDATAAVLBL		(1 << 20)
 #define MCI_RXDATAAVLBL		(1 << 21)
 /* Extended status bits for the ST Micro variants */
 #define MCI_ST_SDIOIT		(1 << 22)
 #define MCI_ST_CEATAEND		(1 << 23)
 #define MCI_ST_CARDBUSY		(1 << 24)

 #define MMCICLEAR		0x038
 #define MCI_CMDCRCFAILCLR	(1 << 0)
 #define MCI_DATACRCFAILCLR	(1 << 1)
 #define MCI_CMDTIMEOUTCLR	(1 << 2)
 #define MCI_DATATIMEOUTCLR	(1 << 3)
 #define MCI_TXUNDERRUNCLR	(1 << 4)
 #define MCI_RXOVERRUNCLR	(1 << 5)
 #define MCI_CMDRESPENDCLR	(1 << 6)
 #define MCI_CMDSENTCLR		(1 << 7)
 #define MCI_DATAENDCLR		(1 << 8)
 #define MCI_STARTBITERRCLR	(1 << 9)
 #define MCI_DATABLOCKENDCLR	(1 << 10)
 /* Extended status bits for the ST Micro variants */
 #define MCI_ST_SDIOITC		(1 << 22)
 #define MCI_ST_CEATAENDC	(1 << 23)
 #define MCI_ST_BUSYENDC		(1 << 24)

 #define MMCIMASK0		0x03c
 #define MCI_CMDCRCFAILMASK	(1 << 0)
 #define MCI_DATACRCFAILMASK	(1 << 1)
 #define MCI_CMDTIMEOUTMASK	(1 << 2)
 #define MCI_DATATIMEOUTMASK	(1 << 3)
 #define MCI_TXUNDERRUNMASK	(1 << 4)
 #define MCI_RXOVERRUNMASK	(1 << 5)
 #define MCI_CMDRESPENDMASK	(1 << 6)
 #define MCI_CMDSENTMASK		(1 << 7)
 #define MCI_DATAENDMASK		(1 << 8)
 #define MCI_STARTBITERRMASK	(1 << 9)
 #define MCI_DATABLOCKENDMASK	(1 << 10)
 #define MCI_CMDACTIVEMASK	(1 << 11)
 #define MCI_TXACTIVEMASK	(1 << 12)
 #define MCI_RXACTIVEMASK	(1 << 13)
 #define MCI_TXFIFOHALFEMPTYMASK	(1 << 14)
 #define MCI_RXFIFOHALFFULLMASK	(1 << 15)
 #define MCI_TXFIFOFULLMASK	(1 << 16)
 #define MCI_RXFIFOFULLMASK	(1 << 17)
 #define MCI_TXFIFOEMPTYMASK	(1 << 18)
 #define MCI_RXFIFOEMPTYMASK	(1 << 19)
 #define MCI_TXDATAAVLBLMASK	(1 << 20)
 #define MCI_RXDATAAVLBLMASK	(1 << 21)
 /* Extended status bits for the ST Micro variants */
 #define MCI_ST_SDIOITMASK	(1 << 22)
 #define MCI_ST_CEATAENDMASK	(1 << 23)
 #define MCI_ST_BUSYENDMASK	(1 << 24)

 #define MMCIMASK1		0x040
 #define MMCIFIFOCNT		0x048
 #define MMCIFIFO		0x080 /* to 0x0bc */

 #define MCI_IRQENABLE	\
 	(MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK|	\
 	MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK|	\
 	MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_STARTBITERRMASK)

 /* These interrupts are directed to IRQ1 when two IRQ lines are available */
 #define MCI_IRQ1MASK \
 	(MCI_RXFIFOHALFFULLMASK | MCI_RXDATAAVLBLMASK | \
 	 MCI_TXFIFOHALFEMPTYMASK)

 #define NR_SG		128

 struct clk;
 struct variant_data;
 struct dma_chan;

 struct mmci_host_next {
 	struct dma_async_tx_descriptor	*dma_desc;
 	struct dma_chan			*dma_chan;
 	s32				cookie;
 };

 struct mmci_host {
 	phys_addr_t		phybase;
 	void __iomem		*base;
 	struct mmc_request	*mrq;
 	struct mmc_command	*cmd;
 	struct mmc_data		*data;
 	struct mmc_host		*mmc;
 	struct clk		*clk;
 	bool			singleirq;

 	spinlock_t		lock;

 	unsigned int		mclk;
 	/* cached value of requested clk in set_ios */
 	unsigned int		clock_cache;
 	unsigned int		cclk;
 	u32			pwr_reg;
 	u32			pwr_reg_add;
 	u32			clk_reg;
 	u32			datactrl_reg;
 	u32			busy_status;
 	bool			vqmmc_enabled;
 	struct mmci_platform_data *plat;
 	struct variant_data	*variant;

 	u8			hw_designer;
 	u8			hw_revision:4;

 	struct timer_list	timer;
 	unsigned int		oldstat;

 	/* pio stuff */
 	struct sg_mapping_iter	sg_miter;
 	unsigned int		size;
 	int (*get_rx_fifocnt)(struct mmci_host *h, u32 status, int remain);

 #ifdef CONFIG_DMA_ENGINE
 	/* DMA stuff */
 	struct dma_chan		*dma_current;
 	struct dma_chan		*dma_rx_channel;
 	struct dma_chan		*dma_tx_channel;
 	struct dma_async_tx_descriptor	*dma_desc_current;
 	struct mmci_host_next	next_data;
 	bool			dma_in_progress;

 #define dma_inprogress(host)	((host)->dma_in_progress)
 #else
 #define dma_inprogress(host)	(0)
 #endif
 };
	/*
	* linux/drivers/mmc/host/mmci.h - ARM PrimeCell MMCI PL180/1 driver
	*
	* Copyright (C) 2003 Deep Blue Solutions, Ltd, 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 version 2 as
	* published by the Free Software Foundation.
	*/
	#define MMCIPOWER 0x000
	#define MCI_PWR_OFF 0x00
	#define MCI_PWR_UP 0x02
	#define MCI_PWR_ON 0x03
	#define MCI_OD (1 << 6)
	#define MCI_ROD (1 << 7)
	/*
	* The ST Micro version does not have ROD and reuse the voltage registers for
	* direction settings.
	*/
	#define MCI_ST_DATA2DIREN (1 << 2)
	#define MCI_ST_CMDDIREN (1 << 3)
	#define MCI_ST_DATA0DIREN (1 << 4)
	#define MCI_ST_DATA31DIREN (1 << 5)
	#define MCI_ST_FBCLKEN (1 << 7)
	#define MCI_ST_DATA74DIREN (1 << 8)

	#define MMCICLOCK 0x004
	#define MCI_CLK_ENABLE (1 << 8)
	#define MCI_CLK_PWRSAVE (1 << 9)
	#define MCI_CLK_BYPASS (1 << 10)
	#define MCI_4BIT_BUS (1 << 11)
	/*
	* 8bit wide buses, hardware flow contronl, negative edges and clock inversion
	* supported in ST Micro U300 and Ux500 versions
	*/
	#define MCI_ST_8BIT_BUS (1 << 12)
	#define MCI_ST_U300_HWFCEN (1 << 13)
	#define MCI_ST_UX500_NEG_EDGE (1 << 13)
	#define MCI_ST_UX500_HWFCEN (1 << 14)
	#define MCI_ST_UX500_CLK_INV (1 << 15)
	/* Modified PL180 on Versatile Express platform */
	#define MCI_ARM_HWFCEN (1 << 12)

	/* Modified on Qualcomm Integrations */
	#define MCI_QCOM_CLK_WIDEBUS_8 (BIT(10) \| BIT(11))
	#define MCI_QCOM_CLK_FLOWENA BIT(12)
	#define MCI_QCOM_CLK_INVERTOUT BIT(13)

	/* select in latch data and command in */
	#define MCI_QCOM_CLK_SELECT_IN_FBCLK BIT(15)
	#define MCI_QCOM_CLK_SELECT_IN_DDR_MODE (BIT(14) \| BIT(15))

	#define MMCIARGUMENT 0x008

	/* The command register controls the Command Path State Machine (CPSM) */
	#define MMCICOMMAND 0x00c
	#define MCI_CPSM_RESPONSE BIT(6)
	#define MCI_CPSM_LONGRSP BIT(7)
	#define MCI_CPSM_INTERRUPT BIT(8)
	#define MCI_CPSM_PENDING BIT(9)
	#define MCI_CPSM_ENABLE BIT(10)
	/* Command register flag extenstions in the ST Micro versions */
	#define MCI_CPSM_ST_SDIO_SUSP BIT(11)
	#define MCI_CPSM_ST_ENCMD_COMPL BIT(12)
	#define MCI_CPSM_ST_NIEN BIT(13)
	#define MCI_CPSM_ST_CE_ATACMD BIT(14)
	/* Command register flag extensions in the Qualcomm versions */
	#define MCI_CPSM_QCOM_PROGENA BIT(11)
	#define MCI_CPSM_QCOM_DATCMD BIT(12)
	#define MCI_CPSM_QCOM_MCIABORT BIT(13)
	#define MCI_CPSM_QCOM_CCSENABLE BIT(14)
	#define MCI_CPSM_QCOM_CCSDISABLE BIT(15)
	#define MCI_CPSM_QCOM_AUTO_CMD19 BIT(16)
	#define MCI_CPSM_QCOM_AUTO_CMD21 BIT(21)

	#define MMCIRESPCMD 0x010
	#define MMCIRESPONSE0 0x014
	#define MMCIRESPONSE1 0x018
	#define MMCIRESPONSE2 0x01c
	#define MMCIRESPONSE3 0x020
	#define MMCIDATATIMER 0x024
	#define MMCIDATALENGTH 0x028

	/* The data control register controls the Data Path State Machine (DPSM) */
	#define MMCIDATACTRL 0x02c
	#define MCI_DPSM_ENABLE BIT(0)
	#define MCI_DPSM_DIRECTION BIT(1)
	#define MCI_DPSM_MODE BIT(2)
	#define MCI_DPSM_DMAENABLE BIT(3)
	#define MCI_DPSM_BLOCKSIZE BIT(4)
	/* Control register extensions in the ST Micro U300 and Ux500 versions */
	#define MCI_DPSM_ST_RWSTART BIT(8)
	#define MCI_DPSM_ST_RWSTOP BIT(9)
	#define MCI_DPSM_ST_RWMOD BIT(10)
	#define MCI_DPSM_ST_SDIOEN BIT(11)
	/* Control register extensions in the ST Micro Ux500 versions */
	#define MCI_DPSM_ST_DMAREQCTL BIT(12)
	#define MCI_DPSM_ST_DBOOTMODEEN BIT(13)
	#define MCI_DPSM_ST_BUSYMODE BIT(14)
	#define MCI_DPSM_ST_DDRMODE BIT(15)
	/* Control register extensions in the Qualcomm versions */
	#define MCI_DPSM_QCOM_DATA_PEND BIT(17)
	#define MCI_DPSM_QCOM_RX_DATA_PEND BIT(20)

	#define MMCIDATACNT 0x030
	#define MMCISTATUS 0x034
	#define MCI_CMDCRCFAIL (1 << 0)
	#define MCI_DATACRCFAIL (1 << 1)
	#define MCI_CMDTIMEOUT (1 << 2)
	#define MCI_DATATIMEOUT (1 << 3)
	#define MCI_TXUNDERRUN (1 << 4)
	#define MCI_RXOVERRUN (1 << 5)
	#define MCI_CMDRESPEND (1 << 6)
	#define MCI_CMDSENT (1 << 7)
	#define MCI_DATAEND (1 << 8)
	#define MCI_STARTBITERR (1 << 9)
	#define MCI_DATABLOCKEND (1 << 10)
	#define MCI_CMDACTIVE (1 << 11)
	#define MCI_TXACTIVE (1 << 12)
	#define MCI_RXACTIVE (1 << 13)
	#define MCI_TXFIFOHALFEMPTY (1 << 14)
	#define MCI_RXFIFOHALFFULL (1 << 15)
	#define MCI_TXFIFOFULL (1 << 16)
	#define MCI_RXFIFOFULL (1 << 17)
	#define MCI_TXFIFOEMPTY (1 << 18)
	#define MCI_RXFIFOEMPTY (1 << 19)
	#define MCI_TXDATAAVLBL (1 << 20)
	#define MCI_RXDATAAVLBL (1 << 21)
	/* Extended status bits for the ST Micro variants */
	#define MCI_ST_SDIOIT (1 << 22)
	#define MCI_ST_CEATAEND (1 << 23)
	#define MCI_ST_CARDBUSY (1 << 24)

	#define MMCICLEAR 0x038
	#define MCI_CMDCRCFAILCLR (1 << 0)
	#define MCI_DATACRCFAILCLR (1 << 1)
	#define MCI_CMDTIMEOUTCLR (1 << 2)
	#define MCI_DATATIMEOUTCLR (1 << 3)
	#define MCI_TXUNDERRUNCLR (1 << 4)
	#define MCI_RXOVERRUNCLR (1 << 5)
	#define MCI_CMDRESPENDCLR (1 << 6)
	#define MCI_CMDSENTCLR (1 << 7)
	#define MCI_DATAENDCLR (1 << 8)
	#define MCI_STARTBITERRCLR (1 << 9)
	#define MCI_DATABLOCKENDCLR (1 << 10)
	/* Extended status bits for the ST Micro variants */
	#define MCI_ST_SDIOITC (1 << 22)
	#define MCI_ST_CEATAENDC (1 << 23)
	#define MCI_ST_BUSYENDC (1 << 24)

	#define MMCIMASK0 0x03c
	#define MCI_CMDCRCFAILMASK (1 << 0)
	#define MCI_DATACRCFAILMASK (1 << 1)
	#define MCI_CMDTIMEOUTMASK (1 << 2)
	#define MCI_DATATIMEOUTMASK (1 << 3)
	#define MCI_TXUNDERRUNMASK (1 << 4)
	#define MCI_RXOVERRUNMASK (1 << 5)
	#define MCI_CMDRESPENDMASK (1 << 6)
	#define MCI_CMDSENTMASK (1 << 7)
	#define MCI_DATAENDMASK (1 << 8)
	#define MCI_STARTBITERRMASK (1 << 9)
	#define MCI_DATABLOCKENDMASK (1 << 10)
	#define MCI_CMDACTIVEMASK (1 << 11)
	#define MCI_TXACTIVEMASK (1 << 12)
	#define MCI_RXACTIVEMASK (1 << 13)
	#define MCI_TXFIFOHALFEMPTYMASK (1 << 14)
	#define MCI_RXFIFOHALFFULLMASK (1 << 15)
	#define MCI_TXFIFOFULLMASK (1 << 16)
	#define MCI_RXFIFOFULLMASK (1 << 17)
	#define MCI_TXFIFOEMPTYMASK (1 << 18)
	#define MCI_RXFIFOEMPTYMASK (1 << 19)
	#define MCI_TXDATAAVLBLMASK (1 << 20)
	#define MCI_RXDATAAVLBLMASK (1 << 21)
	/* Extended status bits for the ST Micro variants */
	#define MCI_ST_SDIOITMASK (1 << 22)
	#define MCI_ST_CEATAENDMASK (1 << 23)
	#define MCI_ST_BUSYENDMASK (1 << 24)

	#define MMCIMASK1 0x040
	#define MMCIFIFOCNT 0x048
	#define MMCIFIFO 0x080 /* to 0x0bc */

	#define MCI_IRQENABLE \
	(MCI_CMDCRCFAILMASK\|MCI_DATACRCFAILMASK\|MCI_CMDTIMEOUTMASK\| \
	MCI_DATATIMEOUTMASK\|MCI_TXUNDERRUNMASK\|MCI_RXOVERRUNMASK\| \
	MCI_CMDRESPENDMASK\|MCI_CMDSENTMASK\|MCI_STARTBITERRMASK)

	/* These interrupts are directed to IRQ1 when two IRQ lines are available */
	#define MCI_IRQ1MASK \
	(MCI_RXFIFOHALFFULLMASK \| MCI_RXDATAAVLBLMASK \| \
	MCI_TXFIFOHALFEMPTYMASK)

	#define NR_SG 128

	struct clk;
	struct variant_data;
	struct dma_chan;

	struct mmci_host_next {
	struct dma_async_tx_descriptor *dma_desc;
	struct dma_chan *dma_chan;
	s32 cookie;
	};

	struct mmci_host {
	phys_addr_t phybase;
	void __iomem *base;
	struct mmc_request *mrq;
	struct mmc_command *cmd;
	struct mmc_data *data;
	struct mmc_host *mmc;
	struct clk *clk;
	bool singleirq;

	spinlock_t lock;

	unsigned int mclk;
	/* cached value of requested clk in set_ios */
	unsigned int clock_cache;
	unsigned int cclk;
	u32 pwr_reg;
	u32 pwr_reg_add;
	u32 clk_reg;
	u32 datactrl_reg;
	u32 busy_status;
	bool vqmmc_enabled;
	struct mmci_platform_data *plat;
	struct variant_data *variant;

	u8 hw_designer;
	u8 hw_revision:4;

	struct timer_list timer;
	unsigned int oldstat;

	/* pio stuff */
	struct sg_mapping_iter sg_miter;
	unsigned int size;
	int (get_rx_fifocnt)(struct mmci_host h, u32 status, int remain);

	#ifdef CONFIG_DMA_ENGINE
	/* DMA stuff */
	struct dma_chan *dma_current;
	struct dma_chan *dma_rx_channel;
	struct dma_chan *dma_tx_channel;
	struct dma_async_tx_descriptor *dma_desc_current;
	struct mmci_host_next next_data;
	bool dma_in_progress;

	#define dma_inprogress(host) ((host)->dma_in_progress)
	#else
	#define dma_inprogress(host) (0)
	#endif
	};