424 lines
11 KiB
C
424 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
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* Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
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*/
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#ifndef __GENERIC_PHY_H
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#define __GENERIC_PHY_H
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#include <dm/ofnode.h>
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struct ofnode_phandle_args;
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/**
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* struct phy - A handle to (allowing control of) a single phy port.
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*
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* Clients provide storage for phy handles. The content of the structure is
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* managed solely by the PHY API and PHY drivers. A phy struct is
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* initialized by "get"ing the phy struct. The phy struct is passed to all
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* other phy APIs to identify which PHY port to operate upon.
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*
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* @dev: The device which implements the PHY port.
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* @id: The PHY ID within the provider.
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*
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*/
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struct phy {
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struct udevice *dev;
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unsigned long id;
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};
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/*
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* struct udevice_ops - set of function pointers for phy operations
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* @init: operation to be performed for initializing phy (optional)
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* @exit: operation to be performed while exiting (optional)
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* @reset: reset the phy (optional).
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* @power_on: powering on the phy (optional)
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* @power_off: powering off the phy (optional)
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*/
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struct phy_ops {
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/**
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* of_xlate - Translate a client's device-tree (OF) phy specifier.
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*
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* The PHY core calls this function as the first step in implementing
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* a client's generic_phy_get_by_*() call.
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*
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* If this function pointer is set to NULL, the PHY core will use a
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* default implementation, which assumes #phy-cells = <0> or
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* #phy-cells = <1>, and in the later case that the DT cell
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* contains a simple integer PHY port ID.
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*
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* @phy: The phy struct to hold the translation result.
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* @args: The phy specifier values from device tree.
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* @return 0 if OK, or a negative error code.
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*/
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int (*of_xlate)(struct phy *phy, struct ofnode_phandle_args *args);
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/**
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* init - initialize the hardware.
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*
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* Hardware intialization should not be done in during probe() but
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* should be implemented in this init() function. It could be starting
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* PLL, taking a controller out of reset, routing, etc. This function
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* is typically called only once per PHY port.
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* If power_on() is not implemented, it must power up the phy.
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*
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* @phy: the PHY port to initialize
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* @return 0 if OK, or a negative error code.
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*/
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int (*init)(struct phy *phy);
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/**
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* exit - de-initialize the PHY device
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*
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* Hardware de-intialization should be done here. Every step done in
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* init() should be undone here.
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* This could be used to suspend the phy to reduce power consumption or
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* to put the phy in a known condition before booting the OS (though it
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* is NOT called automatically before booting the OS)
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* If power_off() is not implemented, it must power down the phy.
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*
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* @phy: PHY port to be de-initialized
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* @return 0 if OK, or a negative error code
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*/
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int (*exit)(struct phy *phy);
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/**
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* reset - resets a PHY device without shutting down
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*
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* @phy: PHY port to be reset
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*
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* During runtime, the PHY may need to be reset in order to
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* re-establish connection etc without being shut down or exit.
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*
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* @return 0 if OK, or a negative error code
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*/
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int (*reset)(struct phy *phy);
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/**
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* power_on - power on a PHY device
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*
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* @phy: PHY port to be powered on
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*
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* During runtime, the PHY may need to be powered on or off several
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* times. This function is used to power on the PHY. It relies on the
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* setup done in init(). If init() is not implemented, it must take care
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* of setting up the context (PLLs, ...)
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*
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* @return 0 if OK, or a negative error code
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*/
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int (*power_on)(struct phy *phy);
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/**
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* power_off - power off a PHY device
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*
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* @phy: PHY port to be powered off
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*
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* During runtime, the PHY may need to be powered on or off several
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* times. This function is used to power off the PHY. Except if
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* init()/deinit() are not implemented, it must not de-initialize
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* everything.
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*
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* @return 0 if OK, or a negative error code
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*/
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int (*power_off)(struct phy *phy);
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/**
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* configure - configure a PHY device
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*
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* @phy: PHY port to be configured
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* @params: PHY Parameters, underlying data is specific to the PHY function
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*
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* During runtime, the PHY may need to be configured for it's main function.
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* This function configures the PHY for it's main function following
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* power_on/off() after beeing initialized.
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*
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* @return 0 if OK, or a negative error code
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*/
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int (*configure)(struct phy *phy, void *params);
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};
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/**
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* struct phy_bulk - A handle to (allowing control of) a bulk of phys.
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*
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* Consumers provide storage for the phy bulk. The content of the structure is
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* managed solely by the phy API. A phy bulk struct is initialized
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* by "get"ing the phy bulk struct.
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* The phy bulk struct is passed to all other bulk phy APIs to apply
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* the API to all the phy in the bulk struct.
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*
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* @phys: An array of phy handles.
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* @count: The number of phy handles in the phys array.
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*/
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struct phy_bulk {
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struct phy *phys;
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unsigned int count;
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};
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#ifdef CONFIG_PHY
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/**
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* generic_phy_init() - initialize the PHY port
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*
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* @phy: the PHY port to initialize
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_init(struct phy *phy);
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/**
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* generic_phy_init() - de-initialize the PHY device
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*
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* @phy: PHY port to be de-initialized
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_exit(struct phy *phy);
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/**
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* generic_phy_reset() - resets a PHY device without shutting down
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*
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* @phy: PHY port to be reset
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*@return 0 if OK, or a negative error code
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*/
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int generic_phy_reset(struct phy *phy);
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/**
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* generic_phy_power_on() - power on a PHY device
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*
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* @phy: PHY port to be powered on
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_power_on(struct phy *phy);
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/**
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* generic_phy_power_off() - power off a PHY device
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*
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* @phy: PHY port to be powered off
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_power_off(struct phy *phy);
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/**
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* generic_phy_configure() - configure a PHY device
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*
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* @phy: PHY port to be configured
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* @params: PHY Parameters, underlying data is specific to the PHY function
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_configure(struct phy *phy, void *params);
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/**
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* generic_phy_get_by_index() - Get a PHY device by integer index.
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*
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* @user: the client device
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* @index: The index in the list of available PHYs
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* @phy: A pointer to the PHY port
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*
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* This looks up a PHY device for a client device based on its position in the
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* list of the possible PHYs.
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*
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* example:
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* usb1: usb_otg_ss@xxx {
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* compatible = "xxx";
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* reg = <xxx>;
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* .
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* .
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* phys = <&usb2_phy>, <&usb3_phy>;
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* .
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* .
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* };
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* the USB2 phy can be accessed by passing index '0' and the USB3 phy can
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* be accessed by passing index '1'
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*
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_get_by_index(struct udevice *user, int index,
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struct phy *phy);
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/**
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* generic_phy_get_by_index_nodev() - Get a PHY device by integer index
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* without a device
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*
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* @node: The client ofnode.
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* @index: The index in the list of available PHYs
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* @phy: A pointer to the PHY port
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*
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* This is a version of generic_phy_get_by_index() that does not use a device.
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*
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* This looks up a PHY device for a client device based on its ofnode and on
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* its position in the list of the possible PHYs.
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*
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* example:
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* usb1: usb_otg_ss@xxx {
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* compatible = "xxx";
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* reg = <xxx>;
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* .
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* .
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* phys = <&usb2_phy>, <&usb3_phy>;
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* .
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* .
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* };
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* the USB2 phy can be accessed by passing index '0' and the USB3 phy can
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* be accessed by passing index '1'
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*
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_get_by_index_nodev(ofnode node, int index, struct phy *phy);
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/**
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* generic_phy_get_by_name() - Get a PHY device by its name.
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*
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* @user: the client device
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* @phy_name: The name of the PHY in the list of possible PHYs
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* @phy: A pointer to the PHY port
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*
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* This looks up a PHY device for a client device in the
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* list of the possible PHYs based on its name.
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*
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* example:
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* usb1: usb_otg_ss@xxx {
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* compatible = "xxx";
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* reg = <xxx>;
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* .
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* .
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* phys = <&usb2_phy>, <&usb3_phy>;
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* phy-names = "usb2phy", "usb3phy";
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* .
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* .
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* };
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* the USB3 phy can be accessed using "usb3phy", and USB2 by using "usb2phy"
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*
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* @return 0 if OK, or a negative error code
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*/
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int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
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struct phy *phy);
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/**
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* generic_phy_get_bulk - Get all phys of a device.
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*
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* This looks up and gets all phys of the consumer device; each device is
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* assumed to have n phys associated with it somehow, and this function finds
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* and gets all of them in a separate structure.
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*
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* @dev: The consumer device.
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* @bulk A pointer to a phy bulk struct to initialize.
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* @return 0 if OK, or a negative error code.
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*/
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int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk);
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/**
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* generic_phy_init_bulk() - Initialize all phys in a phy bulk struct.
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*
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* @bulk: A phy bulk struct that was previously successfully requested
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* by generic_phy_get_bulk().
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* @return 0 if OK, or negative error code.
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*/
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int generic_phy_init_bulk(struct phy_bulk *bulk);
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/**
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* generic_phy_exit_bulk() - de-initialize all phys in a phy bulk struct.
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*
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* @bulk: A phy bulk struct that was previously successfully requested
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* by generic_phy_get_bulk().
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* @return 0 if OK, or negative error code.
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*/
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int generic_phy_exit_bulk(struct phy_bulk *bulk);
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/**
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* generic_phy_power_on_bulk() - Power on all phys in a phy bulk struct.
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*
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* @bulk: A phy bulk struct that was previously successfully requested
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* by generic_phy_get_bulk().
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* @return 0 if OK, or negative error code.
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*/
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int generic_phy_power_on_bulk(struct phy_bulk *bulk);
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/**
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* generic_phy_power_off_bulk() - Power off all phys in a phy bulk struct.
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*
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* @bulk: A phy bulk struct that was previously successfully requested
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* by generic_phy_get_bulk().
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* @return 0 if OK, or negative error code.
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*/
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int generic_phy_power_off_bulk(struct phy_bulk *bulk);
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#else /* CONFIG_PHY */
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static inline int generic_phy_init(struct phy *phy)
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{
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return 0;
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}
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static inline int generic_phy_exit(struct phy *phy)
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{
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return 0;
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}
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static inline int generic_phy_reset(struct phy *phy)
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{
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return 0;
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}
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static inline int generic_phy_power_on(struct phy *phy)
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{
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return 0;
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}
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static inline int generic_phy_power_off(struct phy *phy)
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{
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return 0;
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}
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static inline int generic_phy_get_by_index(struct udevice *user, int index,
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struct phy *phy)
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{
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return 0;
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}
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static inline int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
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struct phy *phy)
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{
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return 0;
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}
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static inline int
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generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
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{
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return 0;
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}
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static inline int generic_phy_init_bulk(struct phy_bulk *bulk)
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{
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return 0;
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}
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static inline int generic_phy_exit_bulk(struct phy_bulk *bulk)
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{
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return 0;
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}
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static inline int generic_phy_power_on_bulk(struct phy_bulk *bulk)
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{
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return 0;
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}
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static inline int generic_phy_power_off_bulk(struct phy_bulk *bulk)
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{
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return 0;
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}
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#endif /* CONFIG_PHY */
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/**
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* generic_phy_valid() - check if PHY port is valid
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*
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* @phy: the PHY port to check
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* @return TRUE if valid, or FALSE
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*/
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static inline bool generic_phy_valid(struct phy *phy)
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{
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return phy && phy->dev;
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}
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#endif /*__GENERIC_PHY_H */
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