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linux-pinenote/drivers/mmc/host/dw_mmc.h
Sonny Rao 3a33a94ce2 mmc: dw_mmc: change to use recommended reset procedure 
This patch changes the fifo reset code to follow the reset procedure
outlined in the documentation of Synopsys Mobile storage host databook.

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@samsung.com>
Acked-by: Seungwon Jeon <tgih.jun@samsung.com>
[sonnyrao: fix compile for !CONFIG_MMC_DW_IDMAC case]
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-08-11 09:52:55 +02:00

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/*
* Synopsys DesignWare Multimedia Card Interface driver
* (Based on NXP driver for lpc 31xx)
*
* Copyright (C) 2009 NXP Semiconductors
* Copyright (C) 2009, 2010 Imagination Technologies Ltd.
*
* This program 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 _DW_MMC_H_
#define _DW_MMC_H_
#define DW_MMC_240A 0x240a
#define SDMMC_CTRL 0x000
#define SDMMC_PWREN 0x004
#define SDMMC_CLKDIV 0x008
#define SDMMC_CLKSRC 0x00c
#define SDMMC_CLKENA 0x010
#define SDMMC_TMOUT 0x014
#define SDMMC_CTYPE 0x018
#define SDMMC_BLKSIZ 0x01c
#define SDMMC_BYTCNT 0x020
#define SDMMC_INTMASK 0x024
#define SDMMC_CMDARG 0x028
#define SDMMC_CMD 0x02c
#define SDMMC_RESP0 0x030
#define SDMMC_RESP1 0x034
#define SDMMC_RESP2 0x038
#define SDMMC_RESP3 0x03c
#define SDMMC_MINTSTS 0x040
#define SDMMC_RINTSTS 0x044
#define SDMMC_STATUS 0x048
#define SDMMC_FIFOTH 0x04c
#define SDMMC_CDETECT 0x050
#define SDMMC_WRTPRT 0x054
#define SDMMC_GPIO 0x058
#define SDMMC_TCBCNT 0x05c
#define SDMMC_TBBCNT 0x060
#define SDMMC_DEBNCE 0x064
#define SDMMC_USRID 0x068
#define SDMMC_VERID 0x06c
#define SDMMC_HCON 0x070
#define SDMMC_UHS_REG 0x074
#define SDMMC_BMOD 0x080
#define SDMMC_PLDMND 0x084
#define SDMMC_DBADDR 0x088
#define SDMMC_IDSTS 0x08c
#define SDMMC_IDINTEN 0x090
#define SDMMC_DSCADDR 0x094
#define SDMMC_BUFADDR 0x098
#define SDMMC_CDTHRCTL 0x100
#define SDMMC_DATA(x) (x)
/*
* Data offset is difference according to Version
* Lower than 2.40a : data register offest is 0x100
*/
#define DATA_OFFSET 0x100
#define DATA_240A_OFFSET 0x200
/* shift bit field */
#define _SBF(f, v) ((v) << (f))
/* Control register defines */
#define SDMMC_CTRL_USE_IDMAC BIT(25)
#define SDMMC_CTRL_CEATA_INT_EN BIT(11)
#define SDMMC_CTRL_SEND_AS_CCSD BIT(10)
#define SDMMC_CTRL_SEND_CCSD BIT(9)
#define SDMMC_CTRL_ABRT_READ_DATA BIT(8)
#define SDMMC_CTRL_SEND_IRQ_RESP BIT(7)
#define SDMMC_CTRL_READ_WAIT BIT(6)
#define SDMMC_CTRL_DMA_ENABLE BIT(5)
#define SDMMC_CTRL_INT_ENABLE BIT(4)
#define SDMMC_CTRL_DMA_RESET BIT(2)
#define SDMMC_CTRL_FIFO_RESET BIT(1)
#define SDMMC_CTRL_RESET BIT(0)
/* Clock Enable register defines */
#define SDMMC_CLKEN_LOW_PWR BIT(16)
#define SDMMC_CLKEN_ENABLE BIT(0)
/* time-out register defines */
#define SDMMC_TMOUT_DATA(n) _SBF(8, (n))
#define SDMMC_TMOUT_DATA_MSK 0xFFFFFF00
#define SDMMC_TMOUT_RESP(n) ((n) & 0xFF)
#define SDMMC_TMOUT_RESP_MSK 0xFF
/* card-type register defines */
#define SDMMC_CTYPE_8BIT BIT(16)
#define SDMMC_CTYPE_4BIT BIT(0)
#define SDMMC_CTYPE_1BIT 0
/* Interrupt status & mask register defines */
#define SDMMC_INT_SDIO(n) BIT(16 + (n))
#define SDMMC_INT_EBE BIT(15)
#define SDMMC_INT_ACD BIT(14)
#define SDMMC_INT_SBE BIT(13)
#define SDMMC_INT_HLE BIT(12)
#define SDMMC_INT_FRUN BIT(11)
#define SDMMC_INT_HTO BIT(10)
#define SDMMC_INT_DRTO BIT(9)
#define SDMMC_INT_RTO BIT(8)
#define SDMMC_INT_DCRC BIT(7)
#define SDMMC_INT_RCRC BIT(6)
#define SDMMC_INT_RXDR BIT(5)
#define SDMMC_INT_TXDR BIT(4)
#define SDMMC_INT_DATA_OVER BIT(3)
#define SDMMC_INT_CMD_DONE BIT(2)
#define SDMMC_INT_RESP_ERR BIT(1)
#define SDMMC_INT_CD BIT(0)
#define SDMMC_INT_ERROR 0xbfc2
/* Command register defines */
#define SDMMC_CMD_START BIT(31)
#define SDMMC_CMD_USE_HOLD_REG BIT(29)
#define SDMMC_CMD_CCS_EXP BIT(23)
#define SDMMC_CMD_CEATA_RD BIT(22)
#define SDMMC_CMD_UPD_CLK BIT(21)
#define SDMMC_CMD_INIT BIT(15)
#define SDMMC_CMD_STOP BIT(14)
#define SDMMC_CMD_PRV_DAT_WAIT BIT(13)
#define SDMMC_CMD_SEND_STOP BIT(12)
#define SDMMC_CMD_STRM_MODE BIT(11)
#define SDMMC_CMD_DAT_WR BIT(10)
#define SDMMC_CMD_DAT_EXP BIT(9)
#define SDMMC_CMD_RESP_CRC BIT(8)
#define SDMMC_CMD_RESP_LONG BIT(7)
#define SDMMC_CMD_RESP_EXP BIT(6)
#define SDMMC_CMD_INDX(n) ((n) & 0x1F)
/* Status register defines */
#define SDMMC_GET_FCNT(x) (((x)>>17) & 0x1FFF)
#define SDMMC_STATUS_DMA_REQ BIT(31)
/* FIFOTH register defines */
#define SDMMC_SET_FIFOTH(m, r, t) (((m) & 0x7) << 28 | \
((r) & 0xFFF) << 16 | \
((t) & 0xFFF))
/* Internal DMAC interrupt defines */
#define SDMMC_IDMAC_INT_AI BIT(9)
#define SDMMC_IDMAC_INT_NI BIT(8)
#define SDMMC_IDMAC_INT_CES BIT(5)
#define SDMMC_IDMAC_INT_DU BIT(4)
#define SDMMC_IDMAC_INT_FBE BIT(2)
#define SDMMC_IDMAC_INT_RI BIT(1)
#define SDMMC_IDMAC_INT_TI BIT(0)
/* Internal DMAC bus mode bits */
#define SDMMC_IDMAC_ENABLE BIT(7)
#define SDMMC_IDMAC_FB BIT(1)
#define SDMMC_IDMAC_SWRESET BIT(0)
/* Version ID register define */
#define SDMMC_GET_VERID(x) ((x) & 0xFFFF)
/* Card read threshold */
#define SDMMC_SET_RD_THLD(v, x) (((v) & 0x1FFF) << 16 | (x))
/* All ctrl reset bits */
#define SDMMC_CTRL_ALL_RESET_FLAGS \
(SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET)
/* Register access macros */
#define mci_readl(dev, reg) \
__raw_readl((dev)->regs + SDMMC_##reg)
#define mci_writel(dev, reg, value) \
__raw_writel((value), (dev)->regs + SDMMC_##reg)
/* 16-bit FIFO access macros */
#define mci_readw(dev, reg) \
__raw_readw((dev)->regs + SDMMC_##reg)
#define mci_writew(dev, reg, value) \
__raw_writew((value), (dev)->regs + SDMMC_##reg)
/* 64-bit FIFO access macros */
#ifdef readq
#define mci_readq(dev, reg) \
__raw_readq((dev)->regs + SDMMC_##reg)
#define mci_writeq(dev, reg, value) \
__raw_writeq((value), (dev)->regs + SDMMC_##reg)
#else
/*
* Dummy readq implementation for architectures that don't define it.
*
* We would assume that none of these architectures would configure
* the IP block with a 64bit FIFO width, so this code will never be
* executed on those machines. Defining these macros here keeps the
* rest of the code free from ifdefs.
*/
#define mci_readq(dev, reg) \
(*(volatile u64 __force *)((dev)->regs + SDMMC_##reg))
#define mci_writeq(dev, reg, value) \
(*(volatile u64 __force *)((dev)->regs + SDMMC_##reg) = (value))
#endif
extern int dw_mci_probe(struct dw_mci *host);
extern void dw_mci_remove(struct dw_mci *host);
#ifdef CONFIG_PM_SLEEP
extern int dw_mci_suspend(struct dw_mci *host);
extern int dw_mci_resume(struct dw_mci *host);
#endif
/**
* struct dw_mci_slot - MMC slot state
* @mmc: The mmc_host representing this slot.
* @host: The MMC controller this slot is using.
* @quirks: Slot-level quirks (DW_MCI_SLOT_QUIRK_XXX)
* @ctype: Card type for this slot.
* @mrq: mmc_request currently being processed or waiting to be
* processed, or NULL when the slot is idle.
* @queue_node: List node for placing this node in the @queue list of
* &struct dw_mci.
* @clock: Clock rate configured by set_ios(). Protected by host->lock.
* @__clk_old: The last updated clock with reflecting clock divider.
* Keeping track of this helps us to avoid spamming the console
* with CONFIG_MMC_CLKGATE.
* @flags: Random state bits associated with the slot.
* @id: Number of this slot.
* @last_detect_state: Most recently observed card detect state.
*/
struct dw_mci_slot {
struct mmc_host *mmc;
struct dw_mci *host;
int quirks;
u32 ctype;
struct mmc_request *mrq;
struct list_head queue_node;
unsigned int clock;
unsigned int __clk_old;
unsigned long flags;
#define DW_MMC_CARD_PRESENT 0
#define DW_MMC_CARD_NEED_INIT 1
int id;
int last_detect_state;
};
struct dw_mci_tuning_data {
const u8 *blk_pattern;
unsigned int blksz;
};
/**
* dw_mci driver data - dw-mshc implementation specific driver data.
* @caps: mmc subsystem specified capabilities of the controller(s).
* @init: early implementation specific initialization.
* @setup_clock: implementation specific clock configuration.
* @prepare_command: handle CMD register extensions.
* @set_ios: handle bus specific extensions.
* @parse_dt: parse implementation specific device tree properties.
* @execute_tuning: implementation specific tuning procedure.
*
* Provide controller implementation specific extensions. The usage of this
* data structure is fully optional and usage of each member in this structure
* is optional as well.
*/
struct dw_mci_drv_data {
unsigned long *caps;
int (*init)(struct dw_mci *host);
int (*setup_clock)(struct dw_mci *host);
void (*prepare_command)(struct dw_mci *host, u32 *cmdr);
void (*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
int (*parse_dt)(struct dw_mci *host);
int (*execute_tuning)(struct dw_mci_slot *slot, u32 opcode,
struct dw_mci_tuning_data *tuning_data);
};
#endif /* _DW_MMC_H_ */
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