drivers/ufs/host/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/pm_qos.h>
#include <linux/soc/mediatek/mtk_sip_svc.h>

/*
 * Vendor specific UFSHCI Registers
 */
#define REG_UFS_XOUFS_CTRL          0x140
#define REG_UFS_REFCLK_CTRL         0x144
#define REG_UFS_EXTREG              0x2100
#define REG_UFS_MPHYCTRL            0x2200
#define REG_UFS_MTK_IP_VER          0x2240
#define REG_UFS_REJECT_MON          0x22AC
#define REG_UFS_DEBUG_SEL           0x22C0
#define REG_UFS_PROBE               0x22C8
#define REG_UFS_DEBUG_SEL_B0        0x22D0
#define REG_UFS_DEBUG_SEL_B1        0x22D4
#define REG_UFS_DEBUG_SEL_B2        0x22D8
#define REG_UFS_DEBUG_SEL_B3        0x22DC

/*
 * 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_US       3000
#define REFCLK_DEFAULT_WAIT_US      32

/*
 * 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,
};

/*
 * Vendor specific host controller state
 */
enum {
	VS_HCE_RESET                = 0,
	VS_HCE_BASE                 = 1,
	VS_HCE_OOCPR_WAIT           = 2,
	VS_HCE_DME_RESET            = 3,
	VS_HCE_MIDDLE               = 4,
	VS_HCE_DME_ENABLE           = 5,
	VS_HCE_DEFAULTS             = 6,
	VS_HIB_IDLEEN               = 7,
	VS_HIB_ENTER                = 8,
	VS_HIB_ENTER_CONF           = 9,
	VS_HIB_MIDDLE               = 10,
	VS_HIB_WAITTIMER            = 11,
	VS_HIB_EXIT_CONF            = 12,
	VS_HIB_EXIT                 = 13,
};

/*
 * SiP commands
 */
#define MTK_SIP_UFS_CONTROL               MTK_SIP_SMC_CMD(0x276)
#define UFS_MTK_SIP_VA09_PWR_CTRL         BIT(0)
#define UFS_MTK_SIP_DEVICE_RESET          BIT(1)
#define UFS_MTK_SIP_CRYPTO_CTRL           BIT(2)
#define UFS_MTK_SIP_REF_CLK_NOTIFICATION  BIT(3)
#define UFS_MTK_SIP_HOST_PWR_CTRL         BIT(5)
#define UFS_MTK_SIP_GET_VCC_NUM           BIT(6)
#define UFS_MTK_SIP_DEVICE_PWR_CTRL       BIT(7)

/*
 * 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,
};

/*
 * Host capability
 */
enum ufs_mtk_host_caps {
	UFS_MTK_CAP_BOOST_CRYPT_ENGINE         = 1 << 0,
	UFS_MTK_CAP_VA09_PWR_CTRL              = 1 << 1,
	UFS_MTK_CAP_DISABLE_AH8                = 1 << 2,
	UFS_MTK_CAP_BROKEN_VCC                 = 1 << 3,
	UFS_MTK_CAP_PMC_VIA_FASTAUTO           = 1 << 6,
};

struct ufs_mtk_crypt_cfg {
	struct regulator *reg_vcore;
	struct clk *clk_crypt_perf;
	struct clk *clk_crypt_mux;
	struct clk *clk_crypt_lp;
	int vcore_volt;
};

struct ufs_mtk_clk {
	struct ufs_clk_info *ufs_sel_clki; /* Mux */
	struct ufs_clk_info *ufs_sel_max_clki; /* Max src */
	struct ufs_clk_info *ufs_sel_min_clki; /* Min src */
};

struct ufs_mtk_hw_ver {
	u8 step;
	u8 minor;
	u8 major;
};

struct ufs_mtk_host {
	struct phy *mphy;
	struct pm_qos_request pm_qos_req;
	struct regulator *reg_va09;
	struct reset_control *hci_reset;
	struct reset_control *unipro_reset;
	struct reset_control *crypto_reset;
	struct ufs_hba *hba;
	struct ufs_mtk_crypt_cfg *crypt;
	struct ufs_mtk_clk mclk;
	struct ufs_mtk_hw_ver hw_ver;
	enum ufs_mtk_host_caps caps;
	bool mphy_powered_on;
	bool pm_qos_init;
	bool unipro_lpm;
	bool ref_clk_enabled;
	u16 ref_clk_ungating_wait_us;
	u16 ref_clk_gating_wait_us;
	u32 ip_ver;
};

/*
 * Multi-VCC by Numbering
 */
enum ufs_mtk_vcc_num {
	UFS_VCC_NONE = 0,
	UFS_VCC_1,
	UFS_VCC_2,
	UFS_VCC_MAX
};

/*
 * Host Power Control options
 */
enum {
	HOST_PWR_HCI = 0,
	HOST_PWR_MPHY
};

/*
 * SMC call wrapper function
 */
struct ufs_mtk_smc_arg {
	unsigned long cmd;
	struct arm_smccc_res *res;
	unsigned long v1;
	unsigned long v2;
	unsigned long v3;
	unsigned long v4;
	unsigned long v5;
	unsigned long v6;
	unsigned long v7;
};

static void _ufs_mtk_smc(struct ufs_mtk_smc_arg s)
{
	arm_smccc_smc(MTK_SIP_UFS_CONTROL,
		      s.cmd, s.v1, s.v2, s.v3, s.v4, s.v5, s.v6, s.res);
}

#define ufs_mtk_smc(...) \
	_ufs_mtk_smc((struct ufs_mtk_smc_arg) {__VA_ARGS__})

/*
 * SMC call interface
 */
#define ufs_mtk_va09_pwr_ctrl(res, on) \
	ufs_mtk_smc(UFS_MTK_SIP_VA09_PWR_CTRL, &(res), on)

#define ufs_mtk_crypto_ctrl(res, enable) \
	ufs_mtk_smc(UFS_MTK_SIP_CRYPTO_CTRL, &(res), enable)

#define ufs_mtk_ref_clk_notify(on, stage, res) \
	ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, &(res), on, stage)

#define ufs_mtk_device_reset_ctrl(high, res) \
	ufs_mtk_smc(UFS_MTK_SIP_DEVICE_RESET, &(res), high)

#define ufs_mtk_host_pwr_ctrl(opt, on, res) \
	ufs_mtk_smc(UFS_MTK_SIP_HOST_PWR_CTRL, &(res), opt, on)

#define ufs_mtk_get_vcc_num(res) \
	ufs_mtk_smc(UFS_MTK_SIP_GET_VCC_NUM, &(res))

#define ufs_mtk_device_pwr_ctrl(on, ufs_ver, res) \
	ufs_mtk_smc(UFS_MTK_SIP_DEVICE_PWR_CTRL, &(res), on, ufs_ver)

#endif /* !_UFS_MEDIATEK_H */