linux/drivers/scsi/ufs/ufs-mediatek.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2019 MediaTek Inc.
 */

#ifndef _UFS_MEDIATEK_H
#define _UFS_MEDIATEK_H

#include <linux/bitops.h>
#include <linux/soc/mediatek/mtk_sip_svc.h>

/*
 * Vendor specific UFSHCI Registers
 */
#define REG_UFS_REFCLK_CTRL         0x144
#define REG_UFS_EXTREG              0x2100
#define REG_UFS_MPHYCTRL            0x2200
#define REG_UFS_REJECT_MON          0x22AC
#define REG_UFS_DEBUG_SEL           0x22C0
#define REG_UFS_PROBE               0x22C8

/*
 * Ref-clk control
 *
 * Values for register REG_UFS_REFCLK_CTRL
 */
#define REFCLK_RELEASE              0x0
#define REFCLK_REQUEST              BIT(0)
#define REFCLK_ACK                  BIT(1)

#define REFCLK_REQ_TIMEOUT_MS       3

/*
 * Vendor specific pre-defined parameters
 */
#define UFS_MTK_LIMIT_NUM_LANES_RX  1
#define UFS_MTK_LIMIT_NUM_LANES_TX  1
#define UFS_MTK_LIMIT_HSGEAR_RX     UFS_HS_G3
#define UFS_MTK_LIMIT_HSGEAR_TX     UFS_HS_G3
#define UFS_MTK_LIMIT_PWMGEAR_RX    UFS_PWM_G4
#define UFS_MTK_LIMIT_PWMGEAR_TX    UFS_PWM_G4
#define UFS_MTK_LIMIT_RX_PWR_PWM    SLOW_MODE
#define UFS_MTK_LIMIT_TX_PWR_PWM    SLOW_MODE
#define UFS_MTK_LIMIT_RX_PWR_HS     FAST_MODE
#define UFS_MTK_LIMIT_TX_PWR_HS     FAST_MODE
#define UFS_MTK_LIMIT_HS_RATE       PA_HS_MODE_B
#define UFS_MTK_LIMIT_DESIRED_MODE  UFS_HS_MODE

/*
 * Other attributes
 */
#define VS_DEBUGCLOCKENABLE         0xD0A1
#define VS_SAVEPOWERCONTROL         0xD0A6
#define VS_UNIPROPOWERDOWNCONTROL   0xD0A8

/*
 * Vendor specific link state
 */
enum {
	VS_LINK_DISABLED            = 0,
	VS_LINK_DOWN                = 1,
	VS_LINK_UP                  = 2,
	VS_LINK_HIBERN8             = 3,
	VS_LINK_LOST                = 4,
	VS_LINK_CFG                 = 5,
};

/*
 * SiP commands
 */
#define MTK_SIP_UFS_CONTROL               MTK_SIP_SMC_CMD(0x276)
#define UFS_MTK_SIP_DEVICE_RESET          BIT(1)
#define UFS_MTK_SIP_REF_CLK_NOTIFICATION  BIT(3)

/*
 * VS_DEBUGCLOCKENABLE
 */
enum {
	TX_SYMBOL_CLK_REQ_FORCE = 5,
};

/*
 * VS_SAVEPOWERCONTROL
 */
enum {
	RX_SYMBOL_CLK_GATE_EN   = 0,
	SYS_CLK_GATE_EN         = 2,
	TX_CLK_GATE_EN          = 3,
};

struct ufs_mtk_host {
	struct ufs_hba *hba;
	struct phy *mphy;
	bool unipro_lpm;
	bool ref_clk_enabled;
	u16 ref_clk_ungating_wait_us;
	u16 ref_clk_gating_wait_us;
};

#endif /* !_UFS_MEDIATEK_H */