/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (c) 2020 Synopsys, Inc. and/or its affiliates.
 * Synopsys DesignWare XPCS helpers
 *
 * Author: Jose Abreu <Jose.Abreu@synopsys.com>
 */

#include <linux/bits.h>
#include <linux/pcs/pcs-xpcs.h>

/* Vendor regs access */
#define DW_VENDOR			BIT(15)

/* VR_XS_PCS */
#define DW_USXGMII_RST			BIT(10)
#define DW_USXGMII_EN			BIT(9)
#define DW_VR_XS_PCS_DIG_CTRL1		0x0000
#define DW_VR_RST			BIT(15)
#define DW_EN_VSMMD1			BIT(13)
#define DW_CL37_BP			BIT(12)
#define DW_VR_XS_PCS_DIG_STS		0x0010
#define DW_RXFIFO_ERR			GENMASK(6, 5)
#define DW_PSEQ_ST			GENMASK(4, 2)
#define DW_PSEQ_ST_GOOD			FIELD_PREP(GENMASK(4, 2), 0x4)

/* SR_MII */
#define DW_USXGMII_FULL			BIT(8)
#define DW_USXGMII_SS_MASK		(BIT(13) | BIT(6) | BIT(5))
#define DW_USXGMII_10000		(BIT(13) | BIT(6))
#define DW_USXGMII_5000			(BIT(13) | BIT(5))
#define DW_USXGMII_2500			(BIT(5))
#define DW_USXGMII_1000			(BIT(6))
#define DW_USXGMII_100			(BIT(13))
#define DW_USXGMII_10			(0)

/* SR_AN */
#define DW_SR_AN_ADV1			0x10
#define DW_SR_AN_ADV2			0x11
#define DW_SR_AN_ADV3			0x12

/* Clause 73 Defines */
/* AN_LP_ABL1 */
#define DW_C73_PAUSE			BIT(10)
#define DW_C73_ASYM_PAUSE		BIT(11)
#define DW_C73_AN_ADV_SF		0x1
/* AN_LP_ABL2 */
#define DW_C73_1000KX			BIT(5)
#define DW_C73_10000KX4			BIT(6)
#define DW_C73_10000KR			BIT(7)
/* AN_LP_ABL3 */
#define DW_C73_2500KX			BIT(0)
#define DW_C73_5000KR			BIT(1)

/* Clause 37 Defines */
/* VR MII MMD registers offsets */
#define DW_VR_MII_DIG_CTRL1		0x8000
#define DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW		BIT(9)
#define DW_VR_MII_DIG_CTRL1_2G5_EN		BIT(2)
#define DW_VR_MII_DIG_CTRL1_PHY_MODE_CTRL	BIT(0)

#define DW_VR_MII_AN_CTRL		0x8001
#define DW_VR_MII_AN_CTRL_8BIT			BIT(8)
#define DW_VR_MII_TX_CONFIG_MASK		BIT(3)
#define DW_VR_MII_TX_CONFIG_PHY_SIDE_SGMII	0x1
#define DW_VR_MII_TX_CONFIG_MAC_SIDE_SGMII	0x0
#define DW_VR_MII_PCS_MODE_MASK			GENMASK(2, 1)
#define DW_VR_MII_PCS_MODE_C37_1000BASEX	0x0
#define DW_VR_MII_PCS_MODE_C37_SGMII		0x2
#define DW_VR_MII_AN_INTR_EN			BIT(0)

#define DW_VR_MII_AN_INTR_STS		0x8002
#define DW_VR_MII_AN_STS_C37_ANCMPLT_INTR	BIT(0)
#define DW_VR_MII_AN_STS_C37_ANSGM_FD		BIT(1)
#define DW_VR_MII_AN_STS_C37_ANSGM_SP		GENMASK(3, 2)
#define DW_VR_MII_C37_ANSGM_SP_10		0x0
#define DW_VR_MII_C37_ANSGM_SP_100		0x1
#define DW_VR_MII_C37_ANSGM_SP_1000		0x2
#define DW_VR_MII_C37_ANSGM_SP_LNKSTS		BIT(4)

#define DW_VR_MII_EEE_MCTRL0		0x8006
#define DW_VR_MII_EEE_LTX_EN			BIT(0)  /* LPI Tx Enable */
#define DW_VR_MII_EEE_LRX_EN			BIT(1)  /* LPI Rx Enable */
#define DW_VR_MII_EEE_TX_QUIET_EN		BIT(2)  /* Tx Quiet Enable */
#define DW_VR_MII_EEE_RX_QUIET_EN		BIT(3)  /* Rx Quiet Enable */
#define DW_VR_MII_EEE_TX_EN_CTRL		BIT(4)  /* Tx Control Enable */
#define DW_VR_MII_EEE_RX_EN_CTRL		BIT(7)  /* Rx Control Enable */
#define DW_VR_MII_EEE_MULT_FACT_100NS		GENMASK(11, 8)

#define DW_VR_MII_EEE_MCTRL1		0x800b
#define DW_VR_MII_EEE_TRN_LPI		BIT(0)	/* Transparent Mode Enable */

#define DW_VR_MII_DIG_CTRL2		0x80e1
#define DW_VR_MII_DIG_CTRL2_TX_POL_INV		BIT(4)
#define DW_VR_MII_DIG_CTRL2_RX_POL_INV		BIT(0)

#define DW_XPCS_INFO_DECLARE(_name, _pcs, _pma)				\
	static const struct dw_xpcs_info _name = { .pcs = _pcs, .pma = _pma }

struct dw_xpcs_desc;

enum dw_xpcs_clock {
	DW_XPCS_CORE_CLK,
	DW_XPCS_PAD_CLK,
	DW_XPCS_NUM_CLKS,
};

struct dw_xpcs {
	struct dw_xpcs_info info;
	const struct dw_xpcs_desc *desc;
	struct mdio_device *mdiodev;
	struct clk_bulk_data clks[DW_XPCS_NUM_CLKS];
	struct phylink_pcs pcs;
	phy_interface_t interface;
	bool need_reset;
	u8 eee_mult_fact;
};

int xpcs_read(struct dw_xpcs *xpcs, int dev, u32 reg);
int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val);
int xpcs_modify(struct dw_xpcs *xpcs, int dev, u32 reg, u16 mask, u16 set);
int xpcs_read_vpcs(struct dw_xpcs *xpcs, int reg);
int xpcs_write_vpcs(struct dw_xpcs *xpcs, int reg, u16 val);
int nxp_sja1105_sgmii_pma_config(struct dw_xpcs *xpcs);
int nxp_sja1110_sgmii_pma_config(struct dw_xpcs *xpcs);
int nxp_sja1110_2500basex_pma_config(struct dw_xpcs *xpcs);
int txgbe_xpcs_switch_mode(struct dw_xpcs *xpcs, phy_interface_t interface);