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u-boot/include/generic-phy.h
Patrice Chotard 84e561407a phy: Add generic_{setup,shutdown}_phy() helpers
In drivers usb/host/{ehci,ohci}-generic.c, {ehci,ohci}_setup_phy() and
{ehci,ohci}_shutdown_phy() shares 95% of common code.
Factorize this code in new generic_{setup,shudown}_phy() functions.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
2022-10-10 18:08:18 +02:00

453 lines
12 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2017 Texas Instruments Incorporated - http://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;
/**
* 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 beeing initialized.
*
* Return: 0 if OK, or a negative error code
*/
int (*configure)(struct phy *phy, void *params);
};
/**
* 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_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
*
* Return: 0 if OK, or negative error code.
*/
int generic_setup_phy(struct udevice *dev, struct phy *phy, int index);
/**
* 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_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)
{
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 */