drivers/mmc/host/sdhci.h

/*
 *  linux/drivers/mmc/host/sdhci.h - Secure Digital Host Controller Interface driver
 *
 * Header file for Host Controller registers and I/O accessors.
 *
 *  Copyright (C) 2005-2008 Pierre Ossman, 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 as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 */
#ifndef __SDHCI_HW_H
#define __SDHCI_HW_H

#include <linux/scatterlist.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/io.h>

#include <linux/mmc/sdhci.h>

/*
 * Controller registers
 */

#define SDHCI_DMA_ADDRESS	0x00
#define SDHCI_ARGUMENT2		SDHCI_DMA_ADDRESS

#define SDHCI_BLOCK_SIZE	0x04
#define  SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))

#define SDHCI_BLOCK_COUNT	0x06

#define SDHCI_ARGUMENT		0x08

#define SDHCI_TRANSFER_MODE	0x0C
#define  SDHCI_TRNS_DMA		0x01
#define  SDHCI_TRNS_BLK_CNT_EN	0x02
#define  SDHCI_TRNS_AUTO_CMD12	0x04
#define  SDHCI_TRNS_AUTO_CMD23	0x08
#define  SDHCI_TRNS_READ	0x10
#define  SDHCI_TRNS_MULTI	0x20

#define SDHCI_COMMAND		0x0E
#define  SDHCI_CMD_RESP_MASK	0x03
#define  SDHCI_CMD_CRC		0x08
#define  SDHCI_CMD_INDEX	0x10
#define  SDHCI_CMD_DATA		0x20
#define  SDHCI_CMD_ABORTCMD	0xC0

#define  SDHCI_CMD_RESP_NONE	0x00
#define  SDHCI_CMD_RESP_LONG	0x01
#define  SDHCI_CMD_RESP_SHORT	0x02
#define  SDHCI_CMD_RESP_SHORT_BUSY 0x03

#define SDHCI_MAKE_CMD(c, f) (((c & 0xff) << 8) | (f & 0xff))
#define SDHCI_GET_CMD(c) ((c>>8) & 0x3f)

#define SDHCI_RESPONSE		0x10

#define SDHCI_BUFFER		0x20

#define SDHCI_PRESENT_STATE	0x24
#define  SDHCI_CMD_INHIBIT	0x00000001
#define  SDHCI_DATA_INHIBIT	0x00000002
#define  SDHCI_DOING_WRITE	0x00000100
#define  SDHCI_DOING_READ	0x00000200
#define  SDHCI_SPACE_AVAILABLE	0x00000400
#define  SDHCI_DATA_AVAILABLE	0x00000800
#define  SDHCI_CARD_PRESENT	0x00010000
#define  SDHCI_WRITE_PROTECT	0x00080000
#define  SDHCI_DATA_LVL_MASK	0x00F00000
#define   SDHCI_DATA_LVL_SHIFT	20
#define   SDHCI_DATA_0_LVL_MASK	0x00100000

#define SDHCI_HOST_CONTROL	0x28
#define  SDHCI_CTRL_LED		0x01
#define  SDHCI_CTRL_4BITBUS	0x02
#define  SDHCI_CTRL_HISPD	0x04
#define  SDHCI_CTRL_DMA_MASK	0x18
#define   SDHCI_CTRL_SDMA	0x00
#define   SDHCI_CTRL_ADMA1	0x08
#define   SDHCI_CTRL_ADMA32	0x10
#define   SDHCI_CTRL_ADMA64	0x18
#define   SDHCI_CTRL_8BITBUS	0x20

#define SDHCI_POWER_CONTROL	0x29
#define  SDHCI_POWER_ON		0x01
#define  SDHCI_POWER_180	0x0A
#define  SDHCI_POWER_300	0x0C
#define  SDHCI_POWER_330	0x0E

#define SDHCI_BLOCK_GAP_CONTROL	0x2A

#define SDHCI_WAKE_UP_CONTROL	0x2B
#define  SDHCI_WAKE_ON_INT	0x01
#define  SDHCI_WAKE_ON_INSERT	0x02
#define  SDHCI_WAKE_ON_REMOVE	0x04

#define SDHCI_CLOCK_CONTROL	0x2C
#define  SDHCI_DIVIDER_SHIFT	8
#define  SDHCI_DIVIDER_HI_SHIFT	6
#define  SDHCI_DIV_MASK	0xFF
#define  SDHCI_DIV_MASK_LEN	8
#define  SDHCI_DIV_HI_MASK	0x300
#define  SDHCI_PROG_CLOCK_MODE	0x0020
#define  SDHCI_CLOCK_CARD_EN	0x0004
#define  SDHCI_CLOCK_INT_STABLE	0x0002
#define  SDHCI_CLOCK_INT_EN	0x0001

#define SDHCI_TIMEOUT_CONTROL	0x2E

#define SDHCI_SOFTWARE_RESET	0x2F
#define  SDHCI_RESET_ALL	0x01
#define  SDHCI_RESET_CMD	0x02
#define  SDHCI_RESET_DATA	0x04

#define SDHCI_INT_STATUS	0x30
#define SDHCI_INT_ENABLE	0x34
#define SDHCI_SIGNAL_ENABLE	0x38
#define  SDHCI_INT_RESPONSE	0x00000001
#define  SDHCI_INT_DATA_END	0x00000002
#define  SDHCI_INT_BLK_GAP	0x00000004
#define  SDHCI_INT_DMA_END	0x00000008
#define  SDHCI_INT_SPACE_AVAIL	0x00000010
#define  SDHCI_INT_DATA_AVAIL	0x00000020
#define  SDHCI_INT_CARD_INSERT	0x00000040
#define  SDHCI_INT_CARD_REMOVE	0x00000080
#define  SDHCI_INT_CARD_INT	0x00000100
#define  SDHCI_INT_ERROR	0x00008000
#define  SDHCI_INT_TIMEOUT	0x00010000
#define  SDHCI_INT_CRC		0x00020000
#define  SDHCI_INT_END_BIT	0x00040000
#define  SDHCI_INT_INDEX	0x00080000
#define  SDHCI_INT_DATA_TIMEOUT	0x00100000
#define  SDHCI_INT_DATA_CRC	0x00200000
#define  SDHCI_INT_DATA_END_BIT	0x00400000
#define  SDHCI_INT_BUS_POWER	0x00800000
#define  SDHCI_INT_ACMD12ERR	0x01000000
#define  SDHCI_INT_ADMA_ERROR	0x02000000

#define  SDHCI_INT_NORMAL_MASK	0x00007FFF
#define  SDHCI_INT_ERROR_MASK	0xFFFF8000

#define  SDHCI_INT_CMD_MASK	(SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \
		SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
#define  SDHCI_INT_DATA_MASK	(SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \
		SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \
		SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \
		SDHCI_INT_DATA_END_BIT | SDHCI_INT_ADMA_ERROR | \
		SDHCI_INT_BLK_GAP)
#define SDHCI_INT_ALL_MASK	((unsigned int)-1)

#define SDHCI_ACMD12_ERR	0x3C

#define SDHCI_HOST_CONTROL2		0x3E
#define  SDHCI_CTRL_UHS_MASK		0x0007
#define   SDHCI_CTRL_UHS_SDR12		0x0000
#define   SDHCI_CTRL_UHS_SDR25		0x0001
#define   SDHCI_CTRL_UHS_SDR50		0x0002
#define   SDHCI_CTRL_UHS_SDR104		0x0003
#define   SDHCI_CTRL_UHS_DDR50		0x0004
#define   SDHCI_CTRL_HS_SDR200		0x0005 /* reserved value in SDIO spec */
#define  SDHCI_CTRL_VDD_180		0x0008
#define  SDHCI_CTRL_DRV_TYPE_MASK	0x0030
#define   SDHCI_CTRL_DRV_TYPE_B		0x0000
#define   SDHCI_CTRL_DRV_TYPE_A		0x0010
#define   SDHCI_CTRL_DRV_TYPE_C		0x0020
#define   SDHCI_CTRL_DRV_TYPE_D		0x0030
#define  SDHCI_CTRL_EXEC_TUNING		0x0040
#define  SDHCI_CTRL_TUNED_CLK		0x0080
#define  SDHCI_CTRL_PRESET_VAL_ENABLE	0x8000

#define SDHCI_CAPABILITIES	0x40
#define  SDHCI_TIMEOUT_CLK_MASK	0x0000003F
#define  SDHCI_TIMEOUT_CLK_SHIFT 0
#define  SDHCI_TIMEOUT_CLK_UNIT	0x00000080
#define  SDHCI_CLOCK_BASE_MASK	0x00003F00
#define  SDHCI_CLOCK_V3_BASE_MASK	0x0000FF00
#define  SDHCI_CLOCK_BASE_SHIFT	8
#define  SDHCI_MAX_BLOCK_MASK	0x00030000
#define  SDHCI_MAX_BLOCK_SHIFT  16
#define  SDHCI_CAN_DO_8BIT	0x00040000
#define  SDHCI_CAN_DO_ADMA2	0x00080000
#define  SDHCI_CAN_DO_ADMA1	0x00100000
#define  SDHCI_CAN_DO_HISPD	0x00200000
#define  SDHCI_CAN_DO_SDMA	0x00400000
#define  SDHCI_CAN_VDD_330	0x01000000
#define  SDHCI_CAN_VDD_300	0x02000000
#define  SDHCI_CAN_VDD_180	0x04000000
#define  SDHCI_CAN_64BIT	0x10000000

#define  SDHCI_SUPPORT_SDR50	0x00000001
#define  SDHCI_SUPPORT_SDR104	0x00000002
#define  SDHCI_SUPPORT_DDR50	0x00000004
#define  SDHCI_DRIVER_TYPE_A	0x00000010
#define  SDHCI_DRIVER_TYPE_C	0x00000020
#define  SDHCI_DRIVER_TYPE_D	0x00000040
#define  SDHCI_RETUNING_TIMER_COUNT_MASK	0x00000F00
#define  SDHCI_RETUNING_TIMER_COUNT_SHIFT	8
#define  SDHCI_USE_SDR50_TUNING			0x00002000
#define  SDHCI_RETUNING_MODE_MASK		0x0000C000
#define  SDHCI_RETUNING_MODE_SHIFT		14
#define  SDHCI_CLOCK_MUL_MASK	0x00FF0000
#define  SDHCI_CLOCK_MUL_SHIFT	16

#define SDHCI_CAPABILITIES_1	0x44

#define SDHCI_MAX_CURRENT		0x48
#define  SDHCI_MAX_CURRENT_LIMIT	0xFF
#define  SDHCI_MAX_CURRENT_330_MASK	0x0000FF
#define  SDHCI_MAX_CURRENT_330_SHIFT	0
#define  SDHCI_MAX_CURRENT_300_MASK	0x00FF00
#define  SDHCI_MAX_CURRENT_300_SHIFT	8
#define  SDHCI_MAX_CURRENT_180_MASK	0xFF0000
#define  SDHCI_MAX_CURRENT_180_SHIFT	16
#define   SDHCI_MAX_CURRENT_MULTIPLIER	4

/* 4C-4F reserved for more max current */

#define SDHCI_SET_ACMD12_ERROR	0x50
#define SDHCI_SET_INT_ERROR	0x52

#define SDHCI_ADMA_ERROR	0x54

/* 55-57 reserved */

#define SDHCI_ADMA_ADDRESS	0x58

/* 60-FB reserved */

#define SDHCI_PRESET_FOR_SDR12 0x66
#define SDHCI_PRESET_FOR_SDR25 0x68
#define SDHCI_PRESET_FOR_SDR50 0x6A
#define SDHCI_PRESET_FOR_SDR104        0x6C
#define SDHCI_PRESET_FOR_DDR50 0x6E
#define SDHCI_PRESET_DRV_MASK  0xC000
#define SDHCI_PRESET_DRV_SHIFT  14
#define SDHCI_PRESET_CLKGEN_SEL_MASK   0x400
#define SDHCI_PRESET_CLKGEN_SEL_SHIFT	10
#define SDHCI_PRESET_SDCLK_FREQ_MASK   0x3FF
#define SDHCI_PRESET_SDCLK_FREQ_SHIFT	0

#define SDHCI_SLOT_INT_STATUS	0xFC

#define SDHCI_HOST_VERSION	0xFE
#define  SDHCI_VENDOR_VER_MASK	0xFF00
#define  SDHCI_VENDOR_VER_SHIFT	8
#define  SDHCI_SPEC_VER_MASK	0x00FF
#define  SDHCI_SPEC_VER_SHIFT	0
#define   SDHCI_SPEC_100	0
#define   SDHCI_SPEC_200	1
#define   SDHCI_SPEC_300	2

/*
 * End of controller registers.
 */

#define SDHCI_MAX_DIV_SPEC_200	256
#define SDHCI_MAX_DIV_SPEC_300	2046

/*
 * Host SDMA buffer boundary. Valid values from 4K to 512K in powers of 2.
 */
#define SDHCI_DEFAULT_BOUNDARY_SIZE  (512 * 1024)
#define SDHCI_DEFAULT_BOUNDARY_ARG   (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12)

/* ADMA2 32-bit DMA descriptor size */
#define SDHCI_ADMA2_32_DESC_SZ	8

/* ADMA2 32-bit DMA alignment */
#define SDHCI_ADMA2_32_ALIGN	4

/* ADMA2 32-bit descriptor */
struct sdhci_adma2_32_desc {
	__le16	cmd;
	__le16	len;
	__le32	addr;
}  __packed __aligned(SDHCI_ADMA2_32_ALIGN);

#define ADMA2_TRAN_VALID	0x21
#define ADMA2_NOP_END_VALID	0x3
#define ADMA2_END		0x2

/*
 * Maximum segments assuming a 512KiB maximum requisition size and a minimum
 * 4KiB page size.
 */
#define SDHCI_MAX_SEGS		128

struct sdhci_ops {
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
	u32		(*read_l)(struct sdhci_host *host, int reg);
	u16		(*read_w)(struct sdhci_host *host, int reg);
	u8		(*read_b)(struct sdhci_host *host, int reg);
	void		(*write_l)(struct sdhci_host *host, u32 val, int reg);
	void		(*write_w)(struct sdhci_host *host, u16 val, int reg);
	void		(*write_b)(struct sdhci_host *host, u8 val, int reg);
#endif

	void	(*set_clock)(struct sdhci_host *host, unsigned int clock);

	int		(*enable_dma)(struct sdhci_host *host);
	unsigned int	(*get_max_clock)(struct sdhci_host *host);
	unsigned int	(*get_min_clock)(struct sdhci_host *host);
	unsigned int	(*get_timeout_clock)(struct sdhci_host *host);
	unsigned int	(*get_max_timeout_count)(struct sdhci_host *host);
	void		(*set_timeout)(struct sdhci_host *host,
				       struct mmc_command *cmd);
	void		(*set_bus_width)(struct sdhci_host *host, int width);
	void (*platform_send_init_74_clocks)(struct sdhci_host *host,
					     u8 power_mode);
	unsigned int    (*get_ro)(struct sdhci_host *host);
	void		(*reset)(struct sdhci_host *host, u8 mask);
	int	(*platform_execute_tuning)(struct sdhci_host *host, u32 opcode);
	void	(*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
	void	(*hw_reset)(struct sdhci_host *host);
	void    (*adma_workaround)(struct sdhci_host *host, u32 intmask);
	void	(*platform_init)(struct sdhci_host *host);
	void    (*card_event)(struct sdhci_host *host);
};

#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS

static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
{
	if (unlikely(host->ops->write_l))
		host->ops->write_l(host, val, reg);
	else
		writel(val, host->ioaddr + reg);
}

static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
{
	if (unlikely(host->ops->write_w))
		host->ops->write_w(host, val, reg);
	else
		writew(val, host->ioaddr + reg);
}

static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
{
	if (unlikely(host->ops->write_b))
		host->ops->write_b(host, val, reg);
	else
		writeb(val, host->ioaddr + reg);
}

static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
{
	if (unlikely(host->ops->read_l))
		return host->ops->read_l(host, reg);
	else
		return readl(host->ioaddr + reg);
}

static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
{
	if (unlikely(host->ops->read_w))
		return host->ops->read_w(host, reg);
	else
		return readw(host->ioaddr + reg);
}

static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
{
	if (unlikely(host->ops->read_b))
		return host->ops->read_b(host, reg);
	else
		return readb(host->ioaddr + reg);
}

#else

static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
{
	writel(val, host->ioaddr + reg);
}

static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
{
	writew(val, host->ioaddr + reg);
}

static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
{
	writeb(val, host->ioaddr + reg);
}

static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
{
	return readl(host->ioaddr + reg);
}

static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
{
	return readw(host->ioaddr + reg);
}

static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
{
	return readb(host->ioaddr + reg);
}

#endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */

extern struct sdhci_host *sdhci_alloc_host(struct device *dev,
	size_t priv_size);
extern void sdhci_free_host(struct sdhci_host *host);

static inline void *sdhci_priv(struct sdhci_host *host)
{
	return (void *)host->private;
}

extern void sdhci_card_detect(struct sdhci_host *host);
extern int sdhci_add_host(struct sdhci_host *host);
extern void sdhci_remove_host(struct sdhci_host *host, int dead);
extern void sdhci_send_command(struct sdhci_host *host,
				struct mmc_command *cmd);

static inline bool sdhci_sdio_irq_enabled(struct sdhci_host *host)
{
	return !!(host->flags & SDHCI_SDIO_IRQ_ENABLED);
}

void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);
void sdhci_set_bus_width(struct sdhci_host *host, int width);
void sdhci_reset(struct sdhci_host *host, u8 mask);
void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing);

#ifdef CONFIG_PM
extern int sdhci_suspend_host(struct sdhci_host *host);
extern int sdhci_resume_host(struct sdhci_host *host);
extern void sdhci_enable_irq_wakeups(struct sdhci_host *host);
#endif

#ifdef CONFIG_PM_RUNTIME
extern int sdhci_runtime_suspend_host(struct sdhci_host *host);
extern int sdhci_runtime_resume_host(struct sdhci_host *host);
#endif

#endif /* __SDHCI_HW_H */