drivers/mmc/host/mmci.h

/*
 *  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
};