Prepare v2025.01

[u-boot.git] / include / generic-phy.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
 * Written by Jean-Jacques Hiblot  <jjhiblot@ti.com>
 */

#ifndef __GENERIC_PHY_H
#define __GENERIC_PHY_H

#include <dm/ofnode.h>

struct ofnode_phandle_args;

enum phy_mode {
        PHY_MODE_INVALID,
        PHY_MODE_USB_HOST,
        PHY_MODE_USB_HOST_LS,
        PHY_MODE_USB_HOST_FS,
        PHY_MODE_USB_HOST_HS,
        PHY_MODE_USB_HOST_SS,
        PHY_MODE_USB_DEVICE,
        PHY_MODE_USB_DEVICE_LS,
        PHY_MODE_USB_DEVICE_FS,
        PHY_MODE_USB_DEVICE_HS,
        PHY_MODE_USB_DEVICE_SS,
        PHY_MODE_USB_OTG,
        PHY_MODE_UFS_HS_A,
        PHY_MODE_UFS_HS_B,
        PHY_MODE_PCIE,
        PHY_MODE_ETHERNET,
        PHY_MODE_MIPI_DPHY,
        PHY_MODE_SATA,
        PHY_MODE_LVDS,
        PHY_MODE_DP
};

/**
 * struct phy - A handle to (allowing control of) a single phy port.
 *
 * Clients provide storage for phy handles. The content of the structure is
 * managed solely by the PHY API and PHY drivers. A phy struct is
 * initialized by "get"ing the phy struct. The phy struct is passed to all
 * other phy APIs to identify which PHY port to operate upon.
 *
 * @dev: The device which implements the PHY port.
 * @id: The PHY ID within the provider.
 *
 */
struct phy {
        struct udevice *dev;
        unsigned long id;
};

/*
 * struct udevice_ops - set of function pointers for phy operations
 * @init: operation to be performed for initializing phy (optional)
 * @exit: operation to be performed while exiting (optional)
 * @reset: reset the phy (optional).
 * @power_on: powering on the phy (optional)
 * @power_off: powering off the phy (optional)
 */
struct phy_ops {
        /**
         * of_xlate - Translate a client's device-tree (OF) phy specifier.
         *
         * The PHY core calls this function as the first step in implementing
         * a client's generic_phy_get_by_*() call.
         *
         * If this function pointer is set to NULL, the PHY core will use a
         * default implementation, which assumes #phy-cells = <0> or
         * #phy-cells = <1>, and in the later case that the DT cell
         * contains a simple integer PHY port ID.
         *
         * @phy:        The phy struct to hold the translation result.
         * @args:       The phy specifier values from device tree.
         * @return 0 if OK, or a negative error code.
         */
        int     (*of_xlate)(struct phy *phy, struct ofnode_phandle_args *args);

        /**
         * init - initialize the hardware.
         *
         * Hardware intialization should not be done in during probe() but
         * should be implemented in this init() function. It could be starting
         * PLL, taking a controller out of reset, routing, etc. This function
         * is typically called only once per PHY port.
         * If power_on() is not implemented, it must power up the phy.
         *
         * @phy:        the PHY port to initialize
         * @return 0 if OK, or a negative error code.
         */
        int     (*init)(struct phy *phy);

        /**
         * exit - de-initialize the PHY device
         *
         * Hardware de-intialization should be done here. Every step done in
         * init() should be undone here.
         * This could be used to suspend the phy to reduce power consumption or
         * to put the phy in a known condition before booting the OS (though it
         * is NOT called automatically before booting the OS)
         * If power_off() is not implemented, it must power down the phy.
         *
         * @phy:        PHY port to be de-initialized
         * Return: 0 if OK, or a negative error code
         */
        int     (*exit)(struct phy *phy);

        /**
         * reset - resets a PHY device without shutting down
         *
         * @phy:        PHY port to be reset
         *
         * During runtime, the PHY may need to be reset in order to
         * re-establish connection etc without being shut down or exit.
         *
         * Return: 0 if OK, or a negative error code
         */
        int     (*reset)(struct phy *phy);

        /**
         * power_on - power on a PHY device
         *
         * @phy:        PHY port to be powered on
         *
         * During runtime, the PHY may need to be powered on or off several
         * times. This function is used to power on the PHY. It relies on the
         * setup done in init(). If init() is not implemented, it must take care
         * of setting up the context (PLLs, ...)
         *
         * Return: 0 if OK, or a negative error code
         */
        int     (*power_on)(struct phy *phy);

        /**
         * power_off - power off a PHY device
         *
         * @phy:        PHY port to be powered off
         *
         * During runtime, the PHY may need to be powered on or off several
         * times. This function is used to power off the PHY. Except if
         * init()/deinit() are not implemented, it must not de-initialize
         * everything.
         *
         * Return: 0 if OK, or a negative error code
         */
        int     (*power_off)(struct phy *phy);

        /**
         * configure - configure a PHY device
         *
         * @phy:        PHY port to be configured
         * @params: PHY Parameters, underlying data is specific to the PHY function
         *
         * During runtime, the PHY may need to be configured for it's main function.
         * This function configures the PHY for it's main function following
         * power_on/off() after being initialized.
         *
         * Return: 0 if OK, or a negative error code
         */
        int     (*configure)(struct phy *phy, void *params);

        /**
         * set_mode - set PHY device mode
         *
         * @phy:        PHY port to be configured
         * @mode: PHY mode
         * @submode: PHY submode
         *
         * Configure PHY mode (e.g. USB, Ethernet, ...) and submode
         * (e.g. for Ethernet this can be RGMII).
         *
         * Return: 0 if OK, or a negative error code
         */
        int     (*set_mode)(struct phy *phy, enum phy_mode mode, int submode);

        /**
         * set_speed - set PHY device speed
         *
         * @phy:        PHY port to be configured
         * @speed: PHY speed
         *
         * Configure PHY speed (e.g. for Ethernet, this could be 10 or 100 ...).
         *
         * Return: 0 if OK, or a negative error code
         */
        int     (*set_speed)(struct phy *phy, int speed);
};

/**
 * struct phy_bulk - A handle to (allowing control of) a bulk of phys.
 *
 * Consumers provide storage for the phy bulk. The content of the structure is
 * managed solely by the phy API. A phy bulk struct is initialized
 * by "get"ing the phy bulk struct.
 * The phy bulk struct is passed to all other bulk phy APIs to apply
 * the API to all the phy in the bulk struct.
 *
 * @phys: An array of phy handles.
 * @count: The number of phy handles in the phys array.
 */
struct phy_bulk {
        struct phy *phys;
        unsigned int count;
};

#if CONFIG_IS_ENABLED(PHY)

/**
 * generic_phy_init() - initialize the PHY port
 *
 * @phy:        the PHY port to initialize
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_init(struct phy *phy);

/**
 * generic_phy_init() - de-initialize the PHY device
 *
 * @phy:        PHY port to be de-initialized
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_exit(struct phy *phy);

/**
 * generic_phy_reset() - resets a PHY device without shutting down
 *
 * @phy:        PHY port to be reset
 *Return: 0 if OK, or a negative error code
 */
int generic_phy_reset(struct phy *phy);

/**
 * generic_phy_power_on() - power on a PHY device
 *
 * @phy:        PHY port to be powered on
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_power_on(struct phy *phy);

/**
 * generic_phy_power_off() - power off a PHY device
 *
 * @phy:        PHY port to be powered off
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_power_off(struct phy *phy);

/**
 * generic_phy_configure() - configure a PHY device
 *
 * @phy:        PHY port to be configured
 * @params:     PHY Parameters, underlying data is specific to the PHY function
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_configure(struct phy *phy, void *params);

/**
 * generic_phy_set_mode() - set PHY device mode
 *
 * @phy:        PHY port to be configured
 * @mode: PHY mode
 * @submode: PHY submode
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode);

/**
 * generic_phy_set_speed() - set PHY device speed
 *
 * @phy:        PHY port to be configured
 * @speed: PHY speed
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_set_speed(struct phy *phy, int speed);

/**
 * generic_phy_get_by_index() - Get a PHY device by integer index.
 *
 * @user:       the client device
 * @index:      The index in the list of available PHYs
 * @phy:        A pointer to the PHY port
 *
 * This looks up a PHY device for a client device based on its position in the
 * list of the possible PHYs.
 *
 * example:
 * usb1: usb_otg_ss@xxx {
 *       compatible = "xxx";
 *       reg = <xxx>;
 *   .
 *   .
 *   phys = <&usb2_phy>, <&usb3_phy>;
 *   .
 *   .
 * };
 * the USB2 phy can be accessed by passing index '0' and the USB3 phy can
 * be accessed by passing index '1'
 *
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_get_by_index(struct udevice *user, int index,
                             struct phy *phy);

/**
 * generic_phy_get_by_index_nodev() - Get a PHY device by integer index
 * without a device
 *
 * @node:       The client ofnode.
 * @index:      The index in the list of available PHYs
 * @phy:        A pointer to the PHY port
 *
 * This is a version of generic_phy_get_by_index() that does not use a device.
 *
 * This looks up a PHY device for a client device based on its ofnode and on
 * its position in the list of the possible PHYs.
 *
 * example:
 * usb1: usb_otg_ss@xxx {
 *       compatible = "xxx";
 *       reg = <xxx>;
 *   .
 *   .
 *   phys = <&usb2_phy>, <&usb3_phy>;
 *   .
 *   .
 * };
 * the USB2 phy can be accessed by passing index '0' and the USB3 phy can
 * be accessed by passing index '1'
 *
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_get_by_index_nodev(ofnode node, int index, struct phy *phy);

/**
 * generic_phy_get_by_name() - Get a PHY device by its name.
 *
 * @user:       the client device
 * @phy_name:   The name of the PHY in the list of possible PHYs
 * @phy:        A pointer to the PHY port
 *
 * This looks up a PHY device for a client device in the
 * list of the possible PHYs based on its name.
 *
 * example:
 * usb1: usb_otg_ss@xxx {
 *       compatible = "xxx";
 *       reg = <xxx>;
 *   .
 *   .
 *   phys = <&usb2_phy>, <&usb3_phy>;
 *   phy-names = "usb2phy", "usb3phy";
 *   .
 *   .
 * };
 * the USB3 phy can be accessed using "usb3phy", and USB2 by using "usb2phy"
 *
 * Return: 0 if OK, or a negative error code
 */
int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
                            struct phy *phy);

/**
 * generic_phy_get_bulk - Get all phys of a device.
 *
 * This looks up and gets all phys of the consumer device; each device is
 * assumed to have n phys associated with it somehow, and this function finds
 * and gets all of them in a separate structure.
 *
 * @dev:        The consumer device.
 * @bulk        A pointer to a phy bulk struct to initialize.
 * Return: 0 if OK, or a negative error code.
 */
int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk);

/**
 * generic_phy_init_bulk() - Initialize all phys in a phy bulk struct.
 *
 * @bulk:       A phy bulk struct that was previously successfully requested
 *              by generic_phy_get_bulk().
 * Return: 0 if OK, or negative error code.
 */
int generic_phy_init_bulk(struct phy_bulk *bulk);

/**
 * generic_phy_exit_bulk() - de-initialize all phys in a phy bulk struct.
 *
 * @bulk:       A phy bulk struct that was previously successfully requested
 *              by generic_phy_get_bulk().
 * Return: 0 if OK, or negative error code.
 */
int generic_phy_exit_bulk(struct phy_bulk *bulk);

/**
 * generic_phy_power_on_bulk() - Power on all phys in a phy     bulk struct.
 *
 * @bulk:       A phy bulk struct that was previously successfully requested
 *              by generic_phy_get_bulk().
 * Return: 0 if OK, or negative error code.
 */
int generic_phy_power_on_bulk(struct phy_bulk *bulk);

/**
 * generic_phy_power_off_bulk() - Power off all phys in a phy bulk struct.
 *
 * @bulk:       A phy bulk struct that was previously successfully requested
 *              by generic_phy_get_bulk().
 * Return: 0 if OK, or negative error code.
 */
int generic_phy_power_off_bulk(struct phy_bulk *bulk);

/**
 * generic_setup_phy() - Get, initialize and power on phy.
 *
 * @dev:        The consumer device.
 * @phy:        A pointer to the PHY port
 * @index:      The index in the list of available PHYs
 * @mode:       PHY mode
 * @submode:    PHY submode
 *
 * Return: 0 if OK, or negative error code.
 */
int generic_setup_phy(struct udevice *dev, struct phy *phy, int index,
                      enum phy_mode mode, int submode);

/**
 * generic_shutdown_phy() - Power off and de-initialize phy.
 *
 * @phy:        A pointer to the PHY port.
 *
 * Return: 0 if OK, or negative error code.
 */
int generic_shutdown_phy(struct phy *phy);

#else /* CONFIG_PHY */

static inline int generic_phy_init(struct phy *phy)
{
        return 0;
}

static inline int generic_phy_exit(struct phy *phy)
{
        return 0;
}

static inline int generic_phy_reset(struct phy *phy)
{
        return 0;
}

static inline int generic_phy_power_on(struct phy *phy)
{
        return 0;
}

static inline int generic_phy_power_off(struct phy *phy)
{
        return 0;
}

static inline int generic_phy_configure(struct phy *phy, void *params)
{
        return 0;
}

static inline int generic_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode)
{
        return 0;
}

static inline int generic_phy_set_speed(struct phy *phy, int speed)
{
        return 0;
}

static inline int generic_phy_get_by_index(struct udevice *user, int index,
                             struct phy *phy)
{
        return 0;
}

static inline int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
                            struct phy *phy)
{
        return 0;
}

static inline int
generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
{
        return 0;
}

static inline int generic_phy_init_bulk(struct phy_bulk *bulk)
{
        return 0;
}

static inline int generic_phy_exit_bulk(struct phy_bulk *bulk)
{
        return 0;
}

static inline int generic_phy_power_on_bulk(struct phy_bulk *bulk)
{
        return 0;
}

static inline int generic_phy_power_off_bulk(struct phy_bulk *bulk)
{
        return 0;
}

static inline int generic_setup_phy(struct udevice *dev, struct phy *phy, int index,
                                    enum phy_mode mode, int submode)
{
        return 0;
}

static inline int generic_shutdown_phy(struct phy *phy)
{
        return 0;
}

#endif /* CONFIG_PHY */

/**
 * generic_phy_valid() - check if PHY port is valid
 *
 * @phy:        the PHY port to check
 * Return: TRUE if valid, or FALSE
 */
static inline bool generic_phy_valid(struct phy *phy)
{
        return phy && phy->dev;
}

#endif /*__GENERIC_PHY_H */