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/*
* Copyright (C) 2016 Marvell, All Rights Reserved.
*
* Author: Hu Ziji <huziji@marvell.com>
* Date: 2016-8-24
*
* 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 version 2.
*/
#ifndef SDHCI_XENON_H_
#define SDHCI_XENON_H_
/* Register Offset of Xenon SDHC self-defined register */
#define XENON_SYS_CFG_INFO 0x0104
#define XENON_SLOT_TYPE_SDIO_SHIFT 24
#define XENON_NR_SUPPORTED_SLOT_MASK 0x7
#define XENON_SYS_OP_CTRL 0x0108
#define XENON_AUTO_CLKGATE_DISABLE_MASK BIT(20)
#define XENON_SDCLK_IDLEOFF_ENABLE_SHIFT 8
#define XENON_SLOT_ENABLE_SHIFT 0
#define XENON_SYS_EXT_OP_CTRL 0x010C
#define XENON_MASK_CMD_CONFLICT_ERR BIT(8)
#define XENON_SLOT_OP_STATUS_CTRL 0x0128
#define XENON_TUN_CONSECUTIVE_TIMES_SHIFT 16
#define XENON_TUN_CONSECUTIVE_TIMES_MASK 0x7
#define XENON_TUN_CONSECUTIVE_TIMES 0x4
#define XENON_TUNING_STEP_SHIFT 12
#define XENON_TUNING_STEP_MASK 0xF
#define XENON_TUNING_STEP_DIVIDER BIT(6)
#define XENON_SLOT_EMMC_CTRL 0x0130
#define XENON_ENABLE_RESP_STROBE BIT(25)
#define XENON_ENABLE_DATA_STROBE BIT(24)
#define XENON_SLOT_RETUNING_REQ_CTRL 0x0144
/* retuning compatible */
#define XENON_RETUNING_COMPATIBLE 0x1
#define XENON_SLOT_EXT_PRESENT_STATE 0x014C
#define XENON_DLL_LOCK_STATE 0x1
#define XENON_SLOT_DLL_CUR_DLY_VAL 0x0150
/* Tuning Parameter */
#define XENON_TMR_RETUN_NO_PRESENT 0xF
#define XENON_DEF_TUNING_COUNT 0x9
#define XENON_DEFAULT_SDCLK_FREQ 400000
#define XENON_LOWEST_SDCLK_FREQ 100000
/* Xenon specific Mode Select value */
#define XENON_CTRL_HS200 0x5
#define XENON_CTRL_HS400 0x6
struct xenon_priv {
unsigned char tuning_count;
/* idx of SDHC */
u8 sdhc_id;
/*
* eMMC/SD/SDIO require different register settings.
* Xenon driver has to recognize card type
* before mmc_host->card is not available.
* This field records the card type during init.
* It is updated in xenon_init_card().
*
* It is only valid during initialization after it is updated.
* Do not access this variable in normal transfers after
* initialization completes.
*/
unsigned int init_card_type;
/*
* The bus_width, timing, and clock fields in below
* record the current ios setting of Xenon SDHC.
* Driver will adjust PHY setting if any change to
* ios affects PHY timing.
*/
unsigned char bus_width;
unsigned char timing;
unsigned int clock;
struct clk *axi_clk;
int phy_type;
/*
* Contains board-specific PHY parameters
* passed from device tree.
*/
void *phy_params;
struct xenon_emmc_phy_regs *emmc_phy_regs;
bool restore_needed;
};
int xenon_phy_adj(struct sdhci_host *host, struct mmc_ios *ios);
int xenon_phy_parse_dt(struct device_node *np,
struct sdhci_host *host);
void xenon_soc_pad_ctrl(struct sdhci_host *host,
unsigned char signal_voltage);
#endif
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