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// SPDX-License-Identifier: GPL-2.0-only
/*
// Copyright (c) 2022 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
*/
#ifndef _LINUX_PSE_CONTROLLER_H
#define _LINUX_PSE_CONTROLLER_H
#include <linux/ethtool.h>
#include <linux/list.h>
#include <uapi/linux/ethtool.h>
struct phy_device;
struct pse_controller_dev;
/**
* struct pse_control_config - PSE control/channel configuration.
*
* @podl_admin_control: set PoDL PSE admin control as described in
* IEEE 802.3-2018 30.15.1.2.1 acPoDLPSEAdminControl
* @c33_admin_control: set PSE admin control as described in
* IEEE 802.3-2022 30.9.1.2.1 acPSEAdminControl
*/
struct pse_control_config {
enum ethtool_podl_pse_admin_state podl_admin_control;
enum ethtool_c33_pse_admin_state c33_admin_control;
};
/**
* struct pse_control_status - PSE control/channel status.
*
* @podl_admin_state: operational state of the PoDL PSE
* functions. IEEE 802.3-2018 30.15.1.1.2 aPoDLPSEAdminState
* @podl_pw_status: power detection status of the PoDL PSE.
* IEEE 802.3-2018 30.15.1.1.3 aPoDLPSEPowerDetectionStatus:
* @c33_admin_state: operational state of the PSE
* functions. IEEE 802.3-2022 30.9.1.1.2 aPSEAdminState
* @c33_pw_status: power detection status of the PSE.
* IEEE 802.3-2022 30.9.1.1.5 aPSEPowerDetectionStatus:
*/
struct pse_control_status {
enum ethtool_podl_pse_admin_state podl_admin_state;
enum ethtool_podl_pse_pw_d_status podl_pw_status;
enum ethtool_c33_pse_admin_state c33_admin_state;
enum ethtool_c33_pse_pw_d_status c33_pw_status;
};
/**
* struct pse_controller_ops - PSE controller driver callbacks
*
* @ethtool_get_status: get PSE control status for ethtool interface
* @ethtool_set_config: set PSE control configuration over ethtool interface
*/
struct pse_controller_ops {
int (*ethtool_get_status)(struct pse_controller_dev *pcdev,
unsigned long id, struct netlink_ext_ack *extack,
struct pse_control_status *status);
int (*ethtool_set_config)(struct pse_controller_dev *pcdev,
unsigned long id, struct netlink_ext_ack *extack,
const struct pse_control_config *config);
};
struct module;
struct device_node;
struct of_phandle_args;
struct pse_control;
/**
* struct pse_controller_dev - PSE controller entity that might
* provide multiple PSE controls
* @ops: a pointer to device specific struct pse_controller_ops
* @owner: kernel module of the PSE controller driver
* @list: internal list of PSE controller devices
* @pse_control_head: head of internal list of requested PSE controls
* @dev: corresponding driver model device struct
* @of_pse_n_cells: number of cells in PSE line specifiers
* @of_xlate: translation function to translate from specifier as found in the
* device tree to id as given to the PSE control ops
* @nr_lines: number of PSE controls in this controller device
* @lock: Mutex for serialization access to the PSE controller
* @types: types of the PSE controller
*/
struct pse_controller_dev {
const struct pse_controller_ops *ops;
struct module *owner;
struct list_head list;
struct list_head pse_control_head;
struct device *dev;
int of_pse_n_cells;
int (*of_xlate)(struct pse_controller_dev *pcdev,
const struct of_phandle_args *pse_spec);
unsigned int nr_lines;
struct mutex lock;
enum ethtool_pse_types types;
};
#if IS_ENABLED(CONFIG_PSE_CONTROLLER)
int pse_controller_register(struct pse_controller_dev *pcdev);
void pse_controller_unregister(struct pse_controller_dev *pcdev);
struct device;
int devm_pse_controller_register(struct device *dev,
struct pse_controller_dev *pcdev);
struct pse_control *of_pse_control_get(struct device_node *node);
void pse_control_put(struct pse_control *psec);
int pse_ethtool_get_status(struct pse_control *psec,
struct netlink_ext_ack *extack,
struct pse_control_status *status);
int pse_ethtool_set_config(struct pse_control *psec,
struct netlink_ext_ack *extack,
const struct pse_control_config *config);
bool pse_has_podl(struct pse_control *psec);
bool pse_has_c33(struct pse_control *psec);
#else
static inline struct pse_control *of_pse_control_get(struct device_node *node)
{
return ERR_PTR(-ENOENT);
}
static inline void pse_control_put(struct pse_control *psec)
{
}
static inline int pse_ethtool_get_status(struct pse_control *psec,
struct netlink_ext_ack *extack,
struct pse_control_status *status)
{
return -ENOTSUPP;
}
static inline int pse_ethtool_set_config(struct pse_control *psec,
struct netlink_ext_ack *extack,
const struct pse_control_config *config)
{
return -ENOTSUPP;
}
static inline bool pse_has_podl(struct pse_control *psec)
{
return false;
}
static inline bool pse_has_c33(struct pse_control *psec)
{
return false;
}
#endif
#endif
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