drivers/scsi/ufs/ufs-qcom.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0-only */
 /* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
  */

 #ifndef UFS_QCOM_H_
 #define UFS_QCOM_H_

 #include <linux/reset-controller.h>
 #include <linux/reset.h>

 #define MAX_UFS_QCOM_HOSTS	1
 #define MAX_U32                 (~(u32)0)
 #define MPHY_TX_FSM_STATE       0x41
 #define TX_FSM_HIBERN8          0x1
 #define HBRN8_POLL_TOUT_MS      100
 #define DEFAULT_CLK_RATE_HZ     1000000
 #define BUS_VECTOR_NAME_LEN     32

 #define UFS_HW_VER_MAJOR_SHFT	(28)
 #define UFS_HW_VER_MAJOR_MASK	(0x000F << UFS_HW_VER_MAJOR_SHFT)
 #define UFS_HW_VER_MINOR_SHFT	(16)
 #define UFS_HW_VER_MINOR_MASK	(0x0FFF << UFS_HW_VER_MINOR_SHFT)
 #define UFS_HW_VER_STEP_SHFT	(0)
 #define UFS_HW_VER_STEP_MASK	(0xFFFF << UFS_HW_VER_STEP_SHFT)

 /* vendor specific pre-defined parameters */
 #define SLOW 1
 #define FAST 2

 #define UFS_QCOM_LIMIT_NUM_LANES_RX	2
 #define UFS_QCOM_LIMIT_NUM_LANES_TX	2
 #define UFS_QCOM_LIMIT_HSGEAR_RX	UFS_HS_G3
 #define UFS_QCOM_LIMIT_HSGEAR_TX	UFS_HS_G3
 #define UFS_QCOM_LIMIT_PWMGEAR_RX	UFS_PWM_G4
 #define UFS_QCOM_LIMIT_PWMGEAR_TX	UFS_PWM_G4
 #define UFS_QCOM_LIMIT_RX_PWR_PWM	SLOW_MODE
 #define UFS_QCOM_LIMIT_TX_PWR_PWM	SLOW_MODE
 #define UFS_QCOM_LIMIT_RX_PWR_HS	FAST_MODE
 #define UFS_QCOM_LIMIT_TX_PWR_HS	FAST_MODE
 #define UFS_QCOM_LIMIT_HS_RATE		PA_HS_MODE_B
 #define UFS_QCOM_LIMIT_DESIRED_MODE	FAST

 /* QCOM UFS host controller vendor specific registers */
 enum {
 	REG_UFS_SYS1CLK_1US                 = 0xC0,
 	REG_UFS_TX_SYMBOL_CLK_NS_US         = 0xC4,
 	REG_UFS_LOCAL_PORT_ID_REG           = 0xC8,
 	REG_UFS_PA_ERR_CODE                 = 0xCC,
 	REG_UFS_RETRY_TIMER_REG             = 0xD0,
 	REG_UFS_PA_LINK_STARTUP_TIMER       = 0xD8,
 	REG_UFS_CFG1                        = 0xDC,
 	REG_UFS_CFG2                        = 0xE0,
 	REG_UFS_HW_VERSION                  = 0xE4,

 	UFS_TEST_BUS				= 0xE8,
 	UFS_TEST_BUS_CTRL_0			= 0xEC,
 	UFS_TEST_BUS_CTRL_1			= 0xF0,
 	UFS_TEST_BUS_CTRL_2			= 0xF4,
 	UFS_UNIPRO_CFG				= 0xF8,

 	/*
 	 * QCOM UFS host controller vendor specific registers
 	 * added in HW Version 3.0.0
 	 */
 	UFS_AH8_CFG				= 0xFC,
 };

 /* QCOM UFS host controller vendor specific debug registers */
 enum {
 	UFS_DBG_RD_REG_UAWM			= 0x100,
 	UFS_DBG_RD_REG_UARM			= 0x200,
 	UFS_DBG_RD_REG_TXUC			= 0x300,
 	UFS_DBG_RD_REG_RXUC			= 0x400,
 	UFS_DBG_RD_REG_DFC			= 0x500,
 	UFS_DBG_RD_REG_TRLUT			= 0x600,
 	UFS_DBG_RD_REG_TMRLUT			= 0x700,
 	UFS_UFS_DBG_RD_REG_OCSC			= 0x800,

 	UFS_UFS_DBG_RD_DESC_RAM			= 0x1500,
 	UFS_UFS_DBG_RD_PRDT_RAM			= 0x1700,
 	UFS_UFS_DBG_RD_RESP_RAM			= 0x1800,
 	UFS_UFS_DBG_RD_EDTL_RAM			= 0x1900,
 };

 #define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x)	(0x000 + x)
 #define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x)	(0x400 + x)

 /* bit definitions for REG_UFS_CFG1 register */
 #define QUNIPRO_SEL		0x1
 #define UTP_DBG_RAMS_EN		0x20000
 #define TEST_BUS_EN		BIT(18)
 #define TEST_BUS_SEL		GENMASK(22, 19)
 #define UFS_REG_TEST_BUS_EN	BIT(30)

 /* bit definitions for REG_UFS_CFG2 register */
 #define UAWM_HW_CGC_EN		(1 << 0)
 #define UARM_HW_CGC_EN		(1 << 1)
 #define TXUC_HW_CGC_EN		(1 << 2)
 #define RXUC_HW_CGC_EN		(1 << 3)
 #define DFC_HW_CGC_EN		(1 << 4)
 #define TRLUT_HW_CGC_EN		(1 << 5)
 #define TMRLUT_HW_CGC_EN	(1 << 6)
 #define OCSC_HW_CGC_EN		(1 << 7)

 /* bit definition for UFS_UFS_TEST_BUS_CTRL_n */
 #define TEST_BUS_SUB_SEL_MASK	0x1F  /* All XXX_SEL fields are 5 bits wide */

 #define REG_UFS_CFG2_CGC_EN_ALL (UAWM_HW_CGC_EN | UARM_HW_CGC_EN |\
 				 TXUC_HW_CGC_EN | RXUC_HW_CGC_EN |\
 				 DFC_HW_CGC_EN | TRLUT_HW_CGC_EN |\
 				 TMRLUT_HW_CGC_EN | OCSC_HW_CGC_EN)

 /* bit offset */
 enum {
 	OFFSET_UFS_PHY_SOFT_RESET           = 1,
 	OFFSET_CLK_NS_REG                   = 10,
 };

 /* bit masks */
 enum {
 	MASK_UFS_PHY_SOFT_RESET             = 0x2,
 	MASK_TX_SYMBOL_CLK_1US_REG          = 0x3FF,
 	MASK_CLK_NS_REG                     = 0xFFFC00,
 };

 /* QCOM UFS debug print bit mask */
 #define UFS_QCOM_DBG_PRINT_REGS_EN	BIT(0)
 #define UFS_QCOM_DBG_PRINT_ICE_REGS_EN	BIT(1)
 #define UFS_QCOM_DBG_PRINT_TEST_BUS_EN	BIT(2)

 #define UFS_QCOM_DBG_PRINT_ALL	\
 	(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_ICE_REGS_EN | \
 	 UFS_QCOM_DBG_PRINT_TEST_BUS_EN)

 /* QUniPro Vendor specific attributes */
 #define PA_VS_CONFIG_REG1	0x9000
 #define DME_VS_CORE_CLK_CTRL	0xD002
 /* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */
 #define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT		BIT(8)
 #define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK	0xFF

 static inline void
 ufs_qcom_get_controller_revision(struct ufs_hba *hba,
 				 u8 *major, u16 *minor, u16 *step)
 {
 	u32 ver = ufshcd_readl(hba, REG_UFS_HW_VERSION);

 	*major = (ver & UFS_HW_VER_MAJOR_MASK) >> UFS_HW_VER_MAJOR_SHFT;
 	*minor = (ver & UFS_HW_VER_MINOR_MASK) >> UFS_HW_VER_MINOR_SHFT;
 	*step = (ver & UFS_HW_VER_STEP_MASK) >> UFS_HW_VER_STEP_SHFT;
 };

 static inline void ufs_qcom_assert_reset(struct ufs_hba *hba)
 {
 	ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
 			1 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);

 	/*
 	 * Make sure assertion of ufs phy reset is written to
 	 * register before returning
 	 */
 	mb();
 }

 static inline void ufs_qcom_deassert_reset(struct ufs_hba *hba)
 {
 	ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
 			0 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);

 	/*
 	 * Make sure de-assertion of ufs phy reset is written to
 	 * register before returning
 	 */
 	mb();
 }

 struct ufs_qcom_bus_vote {
 	uint32_t client_handle;
 	uint32_t curr_vote;
 	int min_bw_vote;
 	int max_bw_vote;
 	int saved_vote;
 	bool is_max_bw_needed;
 	struct device_attribute max_bus_bw;
 };

 /* Host controller hardware version: major.minor.step */
 struct ufs_hw_version {
 	u16 step;
 	u16 minor;
 	u8 major;
 };

 struct ufs_qcom_testbus {
 	u8 select_major;
 	u8 select_minor;
 };

 struct gpio_desc;

 struct ufs_qcom_host {
 	/*
 	 * Set this capability if host controller supports the QUniPro mode
 	 * and if driver wants the Host controller to operate in QUniPro mode.
 	 * Note: By default this capability will be kept enabled if host
 	 * controller supports the QUniPro mode.
 	 */
 	#define UFS_QCOM_CAP_QUNIPRO	0x1

 	/*
 	 * Set this capability if host controller can retain the secure
 	 * configuration even after UFS controller core power collapse.
 	 */
 	#define UFS_QCOM_CAP_RETAIN_SEC_CFG_AFTER_PWR_COLLAPSE	0x2
 	u32 caps;

 	struct phy *generic_phy;
 	struct ufs_hba *hba;
 	struct ufs_qcom_bus_vote bus_vote;
 	struct ufs_pa_layer_attr dev_req_params;
 	struct clk *rx_l0_sync_clk;
 	struct clk *tx_l0_sync_clk;
 	struct clk *rx_l1_sync_clk;
 	struct clk *tx_l1_sync_clk;
 	bool is_lane_clks_enabled;

 	void __iomem *dev_ref_clk_ctrl_mmio;
 	bool is_dev_ref_clk_enabled;
 	struct ufs_hw_version hw_ver;

 	u32 dev_ref_clk_en_mask;

 	/* Bitmask for enabling debug prints */
 	u32 dbg_print_en;
 	struct ufs_qcom_testbus testbus;

 	/* Reset control of HCI */
 	struct reset_control *core_reset;
 	struct reset_controller_dev rcdev;

 	struct gpio_desc *device_reset;
 };

 static inline u32
 ufs_qcom_get_debug_reg_offset(struct ufs_qcom_host *host, u32 reg)
 {
 	if (host->hw_ver.major <= 0x02)
 		return UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(reg);

 	return UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(reg);
 };

 #define ufs_qcom_is_link_off(hba) ufshcd_is_link_off(hba)
 #define ufs_qcom_is_link_active(hba) ufshcd_is_link_active(hba)
 #define ufs_qcom_is_link_hibern8(hba) ufshcd_is_link_hibern8(hba)

 int ufs_qcom_testbus_config(struct ufs_qcom_host *host);

 static inline bool ufs_qcom_cap_qunipro(struct ufs_qcom_host *host)
 {
 	if (host->caps & UFS_QCOM_CAP_QUNIPRO)
 		return true;
 	else
 		return false;
 }

 #endif /* UFS_QCOM_H_ */
	/* SPDX-License-Identifier: GPL-2.0-only */
	/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
	*/

	#ifndef UFS_QCOM_H_
	#define UFS_QCOM_H_

	#include <linux/reset-controller.h>
	#include <linux/reset.h>

	#define MAX_UFS_QCOM_HOSTS 1
	#define MAX_U32 (~(u32)0)
	#define MPHY_TX_FSM_STATE 0x41
	#define TX_FSM_HIBERN8 0x1
	#define HBRN8_POLL_TOUT_MS 100
	#define DEFAULT_CLK_RATE_HZ 1000000
	#define BUS_VECTOR_NAME_LEN 32

	#define UFS_HW_VER_MAJOR_SHFT (28)
	#define UFS_HW_VER_MAJOR_MASK (0x000F << UFS_HW_VER_MAJOR_SHFT)
	#define UFS_HW_VER_MINOR_SHFT (16)
	#define UFS_HW_VER_MINOR_MASK (0x0FFF << UFS_HW_VER_MINOR_SHFT)
	#define UFS_HW_VER_STEP_SHFT (0)
	#define UFS_HW_VER_STEP_MASK (0xFFFF << UFS_HW_VER_STEP_SHFT)

	/* vendor specific pre-defined parameters */
	#define SLOW 1
	#define FAST 2

	#define UFS_QCOM_LIMIT_NUM_LANES_RX 2
	#define UFS_QCOM_LIMIT_NUM_LANES_TX 2
	#define UFS_QCOM_LIMIT_HSGEAR_RX UFS_HS_G3
	#define UFS_QCOM_LIMIT_HSGEAR_TX UFS_HS_G3
	#define UFS_QCOM_LIMIT_PWMGEAR_RX UFS_PWM_G4
	#define UFS_QCOM_LIMIT_PWMGEAR_TX UFS_PWM_G4
	#define UFS_QCOM_LIMIT_RX_PWR_PWM SLOW_MODE
	#define UFS_QCOM_LIMIT_TX_PWR_PWM SLOW_MODE
	#define UFS_QCOM_LIMIT_RX_PWR_HS FAST_MODE
	#define UFS_QCOM_LIMIT_TX_PWR_HS FAST_MODE
	#define UFS_QCOM_LIMIT_HS_RATE PA_HS_MODE_B
	#define UFS_QCOM_LIMIT_DESIRED_MODE FAST

	/* QCOM UFS host controller vendor specific registers */
	enum {
	REG_UFS_SYS1CLK_1US = 0xC0,
	REG_UFS_TX_SYMBOL_CLK_NS_US = 0xC4,
	REG_UFS_LOCAL_PORT_ID_REG = 0xC8,
	REG_UFS_PA_ERR_CODE = 0xCC,
	REG_UFS_RETRY_TIMER_REG = 0xD0,
	REG_UFS_PA_LINK_STARTUP_TIMER = 0xD8,
	REG_UFS_CFG1 = 0xDC,
	REG_UFS_CFG2 = 0xE0,
	REG_UFS_HW_VERSION = 0xE4,

	UFS_TEST_BUS = 0xE8,
	UFS_TEST_BUS_CTRL_0 = 0xEC,
	UFS_TEST_BUS_CTRL_1 = 0xF0,
	UFS_TEST_BUS_CTRL_2 = 0xF4,
	UFS_UNIPRO_CFG = 0xF8,

	/*
	* QCOM UFS host controller vendor specific registers
	* added in HW Version 3.0.0
	*/
	UFS_AH8_CFG = 0xFC,
	};

	/* QCOM UFS host controller vendor specific debug registers */
	enum {
	UFS_DBG_RD_REG_UAWM = 0x100,
	UFS_DBG_RD_REG_UARM = 0x200,
	UFS_DBG_RD_REG_TXUC = 0x300,
	UFS_DBG_RD_REG_RXUC = 0x400,
	UFS_DBG_RD_REG_DFC = 0x500,
	UFS_DBG_RD_REG_TRLUT = 0x600,
	UFS_DBG_RD_REG_TMRLUT = 0x700,
	UFS_UFS_DBG_RD_REG_OCSC = 0x800,

	UFS_UFS_DBG_RD_DESC_RAM = 0x1500,
	UFS_UFS_DBG_RD_PRDT_RAM = 0x1700,
	UFS_UFS_DBG_RD_RESP_RAM = 0x1800,
	UFS_UFS_DBG_RD_EDTL_RAM = 0x1900,
	};

	#define UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(x) (0x000 + x)
	#define UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(x) (0x400 + x)

	/* bit definitions for REG_UFS_CFG1 register */
	#define QUNIPRO_SEL 0x1
	#define UTP_DBG_RAMS_EN 0x20000
	#define TEST_BUS_EN BIT(18)
	#define TEST_BUS_SEL GENMASK(22, 19)
	#define UFS_REG_TEST_BUS_EN BIT(30)

	/* bit definitions for REG_UFS_CFG2 register */
	#define UAWM_HW_CGC_EN (1 << 0)
	#define UARM_HW_CGC_EN (1 << 1)
	#define TXUC_HW_CGC_EN (1 << 2)
	#define RXUC_HW_CGC_EN (1 << 3)
	#define DFC_HW_CGC_EN (1 << 4)
	#define TRLUT_HW_CGC_EN (1 << 5)
	#define TMRLUT_HW_CGC_EN (1 << 6)
	#define OCSC_HW_CGC_EN (1 << 7)

	/* bit definition for UFS_UFS_TEST_BUS_CTRL_n */
	#define TEST_BUS_SUB_SEL_MASK 0x1F /* All XXX_SEL fields are 5 bits wide */

	#define REG_UFS_CFG2_CGC_EN_ALL (UAWM_HW_CGC_EN \| UARM_HW_CGC_EN \|\
	TXUC_HW_CGC_EN \| RXUC_HW_CGC_EN \|\
	DFC_HW_CGC_EN \| TRLUT_HW_CGC_EN \|\
	TMRLUT_HW_CGC_EN \| OCSC_HW_CGC_EN)

	/* bit offset */
	enum {
	OFFSET_UFS_PHY_SOFT_RESET = 1,
	OFFSET_CLK_NS_REG = 10,
	};

	/* bit masks */
	enum {
	MASK_UFS_PHY_SOFT_RESET = 0x2,
	MASK_TX_SYMBOL_CLK_1US_REG = 0x3FF,
	MASK_CLK_NS_REG = 0xFFFC00,
	};

	/* QCOM UFS debug print bit mask */
	#define UFS_QCOM_DBG_PRINT_REGS_EN BIT(0)
	#define UFS_QCOM_DBG_PRINT_ICE_REGS_EN BIT(1)
	#define UFS_QCOM_DBG_PRINT_TEST_BUS_EN BIT(2)

	#define UFS_QCOM_DBG_PRINT_ALL \
	(UFS_QCOM_DBG_PRINT_REGS_EN \| UFS_QCOM_DBG_PRINT_ICE_REGS_EN \| \
	UFS_QCOM_DBG_PRINT_TEST_BUS_EN)

	/* QUniPro Vendor specific attributes */
	#define PA_VS_CONFIG_REG1 0x9000
	#define DME_VS_CORE_CLK_CTRL 0xD002
	/* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */
	#define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT BIT(8)
	#define DME_VS_CORE_CLK_CTRL_MAX_CORE_CLK_1US_CYCLES_MASK 0xFF

	static inline void
	ufs_qcom_get_controller_revision(struct ufs_hba *hba,
	u8 major, u16 minor, u16 *step)
	{
	u32 ver = ufshcd_readl(hba, REG_UFS_HW_VERSION);

	*major = (ver & UFS_HW_VER_MAJOR_MASK) >> UFS_HW_VER_MAJOR_SHFT;
	*minor = (ver & UFS_HW_VER_MINOR_MASK) >> UFS_HW_VER_MINOR_SHFT;
	*step = (ver & UFS_HW_VER_STEP_MASK) >> UFS_HW_VER_STEP_SHFT;
	};

	static inline void ufs_qcom_assert_reset(struct ufs_hba *hba)
	{
	ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
	1 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);

	/*
	* Make sure assertion of ufs phy reset is written to
	* register before returning
	*/
	mb();
	}

	static inline void ufs_qcom_deassert_reset(struct ufs_hba *hba)
	{
	ufshcd_rmwl(hba, MASK_UFS_PHY_SOFT_RESET,
	0 << OFFSET_UFS_PHY_SOFT_RESET, REG_UFS_CFG1);

	/*
	* Make sure de-assertion of ufs phy reset is written to
	* register before returning
	*/
	mb();
	}

	struct ufs_qcom_bus_vote {
	uint32_t client_handle;
	uint32_t curr_vote;
	int min_bw_vote;
	int max_bw_vote;
	int saved_vote;
	bool is_max_bw_needed;
	struct device_attribute max_bus_bw;
	};

	/* Host controller hardware version: major.minor.step */
	struct ufs_hw_version {
	u16 step;
	u16 minor;
	u8 major;
	};

	struct ufs_qcom_testbus {
	u8 select_major;
	u8 select_minor;
	};

	struct gpio_desc;

	struct ufs_qcom_host {
	/*
	* Set this capability if host controller supports the QUniPro mode
	* and if driver wants the Host controller to operate in QUniPro mode.
	* Note: By default this capability will be kept enabled if host
	* controller supports the QUniPro mode.
	*/
	#define UFS_QCOM_CAP_QUNIPRO 0x1

	/*
	* Set this capability if host controller can retain the secure
	* configuration even after UFS controller core power collapse.
	*/
	#define UFS_QCOM_CAP_RETAIN_SEC_CFG_AFTER_PWR_COLLAPSE 0x2
	u32 caps;

	struct phy *generic_phy;
	struct ufs_hba *hba;
	struct ufs_qcom_bus_vote bus_vote;
	struct ufs_pa_layer_attr dev_req_params;
	struct clk *rx_l0_sync_clk;
	struct clk *tx_l0_sync_clk;
	struct clk *rx_l1_sync_clk;
	struct clk *tx_l1_sync_clk;
	bool is_lane_clks_enabled;

	void __iomem *dev_ref_clk_ctrl_mmio;
	bool is_dev_ref_clk_enabled;
	struct ufs_hw_version hw_ver;

	u32 dev_ref_clk_en_mask;

	/* Bitmask for enabling debug prints */
	u32 dbg_print_en;
	struct ufs_qcom_testbus testbus;

	/* Reset control of HCI */
	struct reset_control *core_reset;
	struct reset_controller_dev rcdev;

	struct gpio_desc *device_reset;
	};

	static inline u32
	ufs_qcom_get_debug_reg_offset(struct ufs_qcom_host *host, u32 reg)
	{
	if (host->hw_ver.major <= 0x02)
	return UFS_CNTLR_2_x_x_VEN_REGS_OFFSET(reg);

	return UFS_CNTLR_3_x_x_VEN_REGS_OFFSET(reg);
	};

	#define ufs_qcom_is_link_off(hba) ufshcd_is_link_off(hba)
	#define ufs_qcom_is_link_active(hba) ufshcd_is_link_active(hba)
	#define ufs_qcom_is_link_hibern8(hba) ufshcd_is_link_hibern8(hba)

	int ufs_qcom_testbus_config(struct ufs_qcom_host *host);

	static inline bool ufs_qcom_cap_qunipro(struct ufs_qcom_host *host)
	{
	if (host->caps & UFS_QCOM_CAP_QUNIPRO)
	return true;
	else
	return false;
	}

	#endif /* UFS_QCOM_H_ */