arch/mips/mach-octeon/include/mach/cvmx-qlm.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2020 Marvell International Ltd.
 */

#ifndef __CVMX_QLM_H__
#define __CVMX_QLM_H__

/*
 * Interface 0 on the 78xx can be connected to qlm 0 or qlm 2. When interface
 * 0 is connected to qlm 0, this macro must be set to 0. When interface 0 is
 * connected to qlm 2, this macro must be set to 1.
 */
#define MUX_78XX_IFACE0 0

/*
 * Interface 1 on the 78xx can be connected to qlm 1 or qlm 3. When interface
 * 1 is connected to qlm 1, this macro must be set to 0. When interface 1 is
 * connected to qlm 3, this macro must be set to 1.
 */
#define MUX_78XX_IFACE1 0

/* Uncomment this line to print QLM JTAG state */
/* #define CVMX_QLM_DUMP_STATE 1 */

typedef struct {
	const char *name;
	int stop_bit;
	int start_bit;
} __cvmx_qlm_jtag_field_t;

/**
 * Return the number of QLMs supported by the chip
 *
 * Return:  Number of QLMs
 */
int cvmx_qlm_get_num(void);

/**
 * Return the qlm number based on the interface
 *
 * @param xiface  Interface to look
 */
int cvmx_qlm_interface(int xiface);

/**
 * Return the qlm number based for a port in the interface
 *
 * @param xiface  interface to look up
 * @param index  index in an interface
 *
 * Return: the qlm number based on the xiface
 */
int cvmx_qlm_lmac(int xiface, int index);

/**
 * Return if only DLM5/DLM6/DLM5+DLM6 is used by BGX
 *
 * @param BGX  BGX to search for.
 *
 * Return: muxes used 0 = DLM5+DLM6, 1 = DLM5, 2 = DLM6.
 */
int cvmx_qlm_mux_interface(int bgx);

/**
 * Return number of lanes for a given qlm
 *
 * @param qlm QLM block to query
 *
 * Return:  Number of lanes
 */
int cvmx_qlm_get_lanes(int qlm);

/**
 * Get the QLM JTAG fields based on Octeon model on the supported chips.
 *
 * Return:  qlm_jtag_field_t structure
 */
const __cvmx_qlm_jtag_field_t *cvmx_qlm_jtag_get_field(void);

/**
 * Get the QLM JTAG length by going through qlm_jtag_field for each
 * Octeon model that is supported
 *
 * Return: return the length.
 */
int cvmx_qlm_jtag_get_length(void);

/**
 * Initialize the QLM layer
 */
void cvmx_qlm_init(void);

/**
 * Get a field in a QLM JTAG chain
 *
 * @param qlm    QLM to get
 * @param lane   Lane in QLM to get
 * @param name   String name of field
 *
 * Return: JTAG field value
 */
u64 cvmx_qlm_jtag_get(int qlm, int lane, const char *name);

/**
 * Set a field in a QLM JTAG chain
 *
 * @param qlm    QLM to set
 * @param lane   Lane in QLM to set, or -1 for all lanes
 * @param name   String name of field
 * @param value  Value of the field
 */
void cvmx_qlm_jtag_set(int qlm, int lane, const char *name, u64 value);

/**
 * Errata G-16094: QLM Gen2 Equalizer Default Setting Change.
 * CN68XX pass 1.x and CN66XX pass 1.x QLM tweak. This function tweaks the
 * JTAG setting for a QLMs to run better at 5 and 6.25Ghz.
 */
void __cvmx_qlm_speed_tweak(void);

/**
 * Errata G-16174: QLM Gen2 PCIe IDLE DAC change.
 * CN68XX pass 1.x, CN66XX pass 1.x and CN63XX pass 1.0-2.2 QLM tweak.
 * This function tweaks the JTAG setting for a QLMs for PCIe to run better.
 */
void __cvmx_qlm_pcie_idle_dac_tweak(void);

void __cvmx_qlm_pcie_cfg_rxd_set_tweak(int qlm, int lane);

/**
 * Get the speed (Gbaud) of the QLM in Mhz.
 *
 * @param qlm    QLM to examine
 *
 * Return: Speed in Mhz
 */
int cvmx_qlm_get_gbaud_mhz(int qlm);
/**
 * Get the speed (Gbaud) of the QLM in Mhz on specific node.
 *
 * @param node   Target QLM node
 * @param qlm    QLM to examine
 *
 * Return: Speed in Mhz
 */
int cvmx_qlm_get_gbaud_mhz_node(int node, int qlm);

enum cvmx_qlm_mode {
	CVMX_QLM_MODE_DISABLED = -1,
	CVMX_QLM_MODE_SGMII = 1,
	CVMX_QLM_MODE_XAUI,
	CVMX_QLM_MODE_RXAUI,
	CVMX_QLM_MODE_PCIE,	/* gen3 / gen2 / gen1 */
	CVMX_QLM_MODE_PCIE_1X2, /* 1x2 gen2 / gen1 */
	CVMX_QLM_MODE_PCIE_2X1, /* 2x1 gen2 / gen1 */
	CVMX_QLM_MODE_PCIE_1X1, /* 1x1 gen2 / gen1 */
	CVMX_QLM_MODE_SRIO_1X4, /* 1x4 short / long */
	CVMX_QLM_MODE_SRIO_2X2, /* 2x2 short / long */
	CVMX_QLM_MODE_SRIO_4X1, /* 4x1 short / long */
	CVMX_QLM_MODE_ILK,
	CVMX_QLM_MODE_QSGMII,
	CVMX_QLM_MODE_SGMII_SGMII,
	CVMX_QLM_MODE_SGMII_DISABLED,
	CVMX_QLM_MODE_DISABLED_SGMII,
	CVMX_QLM_MODE_SGMII_QSGMII,
	CVMX_QLM_MODE_QSGMII_QSGMII,
	CVMX_QLM_MODE_QSGMII_DISABLED,
	CVMX_QLM_MODE_DISABLED_QSGMII,
	CVMX_QLM_MODE_QSGMII_SGMII,
	CVMX_QLM_MODE_RXAUI_1X2,
	CVMX_QLM_MODE_SATA_2X1,
	CVMX_QLM_MODE_XLAUI,
	CVMX_QLM_MODE_XFI,
	CVMX_QLM_MODE_10G_KR,
	CVMX_QLM_MODE_40G_KR4,
	CVMX_QLM_MODE_PCIE_1X8, /* 1x8 gen3 / gen2 / gen1 */
	CVMX_QLM_MODE_RGMII_SGMII,
	CVMX_QLM_MODE_RGMII_XFI,
	CVMX_QLM_MODE_RGMII_10G_KR,
	CVMX_QLM_MODE_RGMII_RXAUI,
	CVMX_QLM_MODE_RGMII_XAUI,
	CVMX_QLM_MODE_RGMII_XLAUI,
	CVMX_QLM_MODE_RGMII_40G_KR4,
	CVMX_QLM_MODE_MIXED,		/* BGX2 is mixed mode, DLM5(SGMII) & DLM6(XFI) */
	CVMX_QLM_MODE_SGMII_2X1,	/* Configure BGX2 separate for DLM5 & DLM6 */
	CVMX_QLM_MODE_10G_KR_1X2,	/* Configure BGX2 separate for DLM5 & DLM6 */
	CVMX_QLM_MODE_XFI_1X2,		/* Configure BGX2 separate for DLM5 & DLM6 */
	CVMX_QLM_MODE_RGMII_SGMII_1X1,	/* Configure BGX2, applies to DLM5 */
	CVMX_QLM_MODE_RGMII_SGMII_2X1,	/* Configure BGX2, applies to DLM6 */
	CVMX_QLM_MODE_RGMII_10G_KR_1X1, /* Configure BGX2, applies to DLM6 */
	CVMX_QLM_MODE_RGMII_XFI_1X1,	/* Configure BGX2, applies to DLM6 */
	CVMX_QLM_MODE_SDL,		/* RMAC Pipe */
	CVMX_QLM_MODE_CPRI,		/* RMAC */
	CVMX_QLM_MODE_OCI
};

enum cvmx_gmx_inf_mode {
	CVMX_GMX_INF_MODE_DISABLED = 0,
	CVMX_GMX_INF_MODE_SGMII = 1,  /* Other interface can be SGMII or QSGMII */
	CVMX_GMX_INF_MODE_QSGMII = 2, /* Other interface can be SGMII or QSGMII */
	CVMX_GMX_INF_MODE_RXAUI = 3,  /* Only interface 0, interface 1 must be DISABLED */
};

/**
 * Eye diagram captures are stored in the following structure
 */
typedef struct {
	int width;	   /* Width in the x direction (time) */
	int height;	   /* Height in the y direction (voltage) */
	u32 data[64][128]; /* Error count at location, saturates as max */
} cvmx_qlm_eye_t;

/**
 * These apply to DLM1 and DLM2 if its not in SATA mode
 * Manual refers to lanes as follows:
 *  DML 0 lane 0 == GSER0 lane 0
 *  DML 0 lane 1 == GSER0 lane 1
 *  DML 1 lane 2 == GSER1 lane 0
 *  DML 1 lane 3 == GSER1 lane 1
 *  DML 2 lane 4 == GSER2 lane 0
 *  DML 2 lane 5 == GSER2 lane 1
 */
enum cvmx_pemx_cfg_mode {
	CVMX_PEM_MD_GEN2_2LANE = 0, /* Valid for PEM0(DLM1), PEM1(DLM2) */
	CVMX_PEM_MD_GEN2_1LANE = 1, /* Valid for PEM0(DLM1.0), PEM1(DLM1.1,DLM2.0), PEM2(DLM2.1) */
	CVMX_PEM_MD_GEN2_4LANE = 2, /* Valid for PEM0(DLM1-2) */
	/* Reserved */
	CVMX_PEM_MD_GEN1_2LANE = 4, /* Valid for PEM0(DLM1), PEM1(DLM2) */
	CVMX_PEM_MD_GEN1_1LANE = 5, /* Valid for PEM0(DLM1.0), PEM1(DLM1.1,DLM2.0), PEM2(DLM2.1) */
	CVMX_PEM_MD_GEN1_4LANE = 6, /* Valid for PEM0(DLM1-2) */
	/* Reserved */
};

/*
 * Read QLM and return mode.
 */
enum cvmx_qlm_mode cvmx_qlm_get_mode(int qlm);
enum cvmx_qlm_mode cvmx_qlm_get_mode_cn78xx(int node, int qlm);
enum cvmx_qlm_mode cvmx_qlm_get_dlm_mode(int dlm_mode, int interface);
void __cvmx_qlm_set_mult(int qlm, int baud_mhz, int old_multiplier);

void cvmx_qlm_display_registers(int qlm);

int cvmx_qlm_measure_clock(int qlm);

/**
 * Measure the reference clock of a QLM on a multi-node setup
 *
 * @param node   node to measure
 * @param qlm    QLM to measure
 *
 * Return: Clock rate in Hz
 */
int cvmx_qlm_measure_clock_node(int node, int qlm);

/*
 * Perform RX equalization on a QLM
 *
 * @param node	Node the QLM is on
 * @param qlm	QLM to perform RX equalization on
 * @param lane	Lane to use, or -1 for all lanes
 *
 * Return: Zero on success, negative if any lane failed RX equalization
 */
int __cvmx_qlm_rx_equalization(int node, int qlm, int lane);

/**
 * Errata GSER-27882 -GSER 10GBASE-KR Transmit Equalizer
 * Training may not update PHY Tx Taps. This function is not static
 * so we can share it with BGX KR
 *
 * @param node	Node to apply errata workaround
 * @param qlm	QLM to apply errata workaround
 * @param lane	Lane to apply the errata
 */
int cvmx_qlm_gser_errata_27882(int node, int qlm, int lane);

void cvmx_qlm_gser_errata_25992(int node, int qlm);

#ifdef CVMX_DUMP_GSER
/**
 * Dump GSER configuration for node 0
 */
int cvmx_dump_gser_config(unsigned int gser);
/**
 * Dump GSER status for node 0
 */
int cvmx_dump_gser_status(unsigned int gser);
/**
 * Dump GSER configuration
 */
int cvmx_dump_gser_config_node(unsigned int node, unsigned int gser);
/**
 * Dump GSER status
 */
int cvmx_dump_gser_status_node(unsigned int node, unsigned int gser);
#endif

int cvmx_qlm_eye_display(int node, int qlm, int qlm_lane, int format, const cvmx_qlm_eye_t *eye);

void cvmx_prbs_process_cmd(int node, int qlm, int mode);

#endif /* __CVMX_QLM_H__ */