include/miiphy.h

/* SPDX-License-Identifier: GPL-2.0 OR IBM-pibs */
/*
 * Additions (C) Copyright 2009 Industrie Dial Face S.p.A.
 */
/*----------------------------------------------------------------------------+
|
|  File Name:	miiphy.h
|
|  Function:	Include file defining PHY registers.
|
|  Author:	Mark Wisner
|
+----------------------------------------------------------------------------*/
#ifndef _miiphy_h_
#define _miiphy_h_

#include <linux/mii.h>
#include <linux/list.h>
#include <net.h>
#include <phy.h>

int miiphy_read(const char *devname, unsigned char addr, unsigned char reg,
		 unsigned short *value);
int miiphy_write(const char *devname, unsigned char addr, unsigned char reg,
		  unsigned short value);
int miiphy_info(const char *devname, unsigned char addr, unsigned int *oui,
		 unsigned char *model, unsigned char *rev);
int miiphy_reset(const char *devname, unsigned char addr);
int miiphy_speed(const char *devname, unsigned char addr);
int miiphy_duplex(const char *devname, unsigned char addr);
int miiphy_is_1000base_x(const char *devname, unsigned char addr);
#ifdef CONFIG_SYS_FAULT_ECHO_LINK_DOWN
int miiphy_link(const char *devname, unsigned char addr);
#endif

void miiphy_init(void);

int miiphy_set_current_dev(const char *devname);
const char *miiphy_get_current_dev(void);
struct mii_dev *mdio_get_current_dev(void);
struct list_head *mdio_get_list_head(void);
struct mii_dev *miiphy_get_dev_by_name(const char *devname);
struct phy_device *mdio_phydev_for_ethname(const char *devname);

void miiphy_listdev(void);

struct mii_dev *mdio_alloc(void);
void mdio_free(struct mii_dev *bus);
int mdio_register(struct mii_dev *bus);

/**
 * mdio_register_seq - Register mdio bus with sequence number
 * @bus: mii device structure
 * @seq: sequence number
 *
 * Return: 0 if success, negative value if error
 */
int mdio_register_seq(struct mii_dev *bus, int seq);
int mdio_unregister(struct mii_dev *bus);
void mdio_list_devices(void);

#ifdef CONFIG_BITBANGMII

#define BB_MII_DEVNAME	"bb_miiphy"

struct bb_miiphy_bus {
	char name[16];
	int (*init)(struct bb_miiphy_bus *bus);
	int (*mdio_active)(struct bb_miiphy_bus *bus);
	int (*mdio_tristate)(struct bb_miiphy_bus *bus);
	int (*set_mdio)(struct bb_miiphy_bus *bus, int v);
	int (*get_mdio)(struct bb_miiphy_bus *bus, int *v);
	int (*set_mdc)(struct bb_miiphy_bus *bus, int v);
	int (*delay)(struct bb_miiphy_bus *bus);
#ifdef CONFIG_BITBANGMII_MULTI
	void *priv;
#endif
};

extern struct bb_miiphy_bus bb_miiphy_buses[];
extern int bb_miiphy_buses_num;

/**
 * bb_miiphy_init() - Initialize bit-banged MII bus driver
 *
 * It is called during the generic post-relocation init sequence.
 *
 * Return: 0 if OK
 */
int bb_miiphy_init(void);

int bb_miiphy_read(struct mii_dev *miidev, int addr, int devad, int reg);
int bb_miiphy_write(struct mii_dev *miidev, int addr, int devad, int reg,
		    u16 value);
#endif

/* phy seed setup */
#define AUTO			99
#define _1000BASET		1000
#define _100BASET		100
#define _10BASET		10
#define HALF			22
#define FULL			44

/* phy register offsets */
#define MII_MIPSCR		0x11

/* MII_LPA */
#define PHY_ANLPAR_PSB_802_3	0x0001
#define PHY_ANLPAR_PSB_802_9	0x0002

/* MII_CTRL1000 masks */
#define PHY_1000BTCR_1000FD	0x0200
#define PHY_1000BTCR_1000HD	0x0100

/* MII_STAT1000 masks */
#define PHY_1000BTSR_MSCF	0x8000
#define PHY_1000BTSR_MSCR	0x4000
#define PHY_1000BTSR_LRS	0x2000
#define PHY_1000BTSR_RRS	0x1000
#define PHY_1000BTSR_1000FD	0x0800
#define PHY_1000BTSR_1000HD	0x0400

/* phy EXSR */
#define ESTATUS_1000XF		0x8000
#define ESTATUS_1000XH		0x4000

/**
 * struct mdio_perdev_priv - Per-device class data for MDIO DM
 *
 * @mii_bus: Supporting MII legacy bus
 */
struct mdio_perdev_priv {
	struct mii_dev *mii_bus;
};

/**
 * struct mdio_ops - MDIO bus operations
 *
 * @read: Read from a PHY register
 * @write: Write to a PHY register
 * @reset: Reset the MDIO bus, NULL if not supported
 */
struct mdio_ops {
	int (*read)(struct udevice *mdio_dev, int addr, int devad, int reg);
	int (*write)(struct udevice *mdio_dev, int addr, int devad, int reg,
		     u16 val);
	int (*reset)(struct udevice *mdio_dev);
};

#define mdio_get_ops(dev) ((struct mdio_ops *)(dev)->driver->ops)

/**
 * dm_mdio_probe_devices - Call probe on all MII devices, currently used for
 * MDIO console commands.
 */
void dm_mdio_probe_devices(void);

/**
 * dm_mdio_read - Wrapper over .read() operation for DM MDIO
 *
 * @mdiodev: mdio device
 * @addr: PHY address on MDIO bus
 * @devad: device address on PHY if C45; should be MDIO_DEVAD_NONE if C22
 * @reg: register address
 * Return: register value if non-negative, -error code otherwise
 */
int dm_mdio_read(struct udevice *mdio_dev, int addr, int devad, int reg);

/**
 * dm_mdio_write - Wrapper over .write() operation for DM MDIO
 *
 * @mdiodev: mdio device
 * @addr: PHY address on MDIO bus
 * @devad: device address on PHY if C45; should be MDIO_DEVAD_NONE if C22
 * @reg: register address
 * @val: value to write
 * Return: 0 on success, -error code otherwise
 */
int dm_mdio_write(struct udevice *mdio_dev, int addr, int devad, int reg, u16 val);

/**
 * dm_mdio_reset - Wrapper over .reset() operation for DM MDIO
 *
 * @mdiodev: mdio device
 * Return: 0 on success, -error code otherwise
 */
int dm_mdio_reset(struct udevice *mdio_dev);

/**
 * dm_phy_find_by_ofnode - Find PHY device by ofnode
 *
 * @phynode: PHY's ofnode
 *
 * Return: pointer to phy_device, or NULL on error
 */
struct phy_device *dm_phy_find_by_ofnode(ofnode phynode);

/**
 * dm_mdio_phy_connect - Wrapper over phy_connect for DM MDIO
 *
 * @mdiodev: mdio device the PHY is accesible on
 * @phyaddr: PHY address on MDIO bus
 * @ethdev: ethernet device to connect to the PHY
 * @interface: MAC-PHY protocol
 *
 * Return: pointer to phy_device, or 0 on error
 */
struct phy_device *dm_mdio_phy_connect(struct udevice *mdiodev, int phyaddr,
				       struct udevice *ethdev,
				       phy_interface_t interface);

/**
 * dm_eth_phy_connect - Connect an Eth device to a PHY based on device tree
 *
 * Picks up the DT phy-handle and phy-mode from ethernet device node and
 * connects the ethernet device to the linked PHY.
 *
 * @ethdev: ethernet device
 *
 * Return: pointer to phy_device, or 0 on error
 */
struct phy_device *dm_eth_phy_connect(struct udevice *ethdev);

/* indicates none of the child buses is selected */
#define MDIO_MUX_SELECT_NONE	-1

/**
 * struct mdio_mux_ops - MDIO MUX operations
 *
 * @select: Selects a child bus
 * @deselect: Clean up selection.  Optional, can be NULL
 */
struct mdio_mux_ops {
	int (*select)(struct udevice *mux, int cur, int sel);
	int (*deselect)(struct udevice *mux, int sel);
};

#define mdio_mux_get_ops(dev) ((struct mdio_mux_ops *)(dev)->driver->ops)

#endif