// SPDX-License-Identifier: GPL-2.0-only
/*
// Copyright (c) 2022 Pengutronix, Oleksij Rempel <[email protected]>
*/
#ifndef _LINUX_PSE_CONTROLLER_H
#define _LINUX_PSE_CONTROLLER_H
#include <linux/ethtool.h>
#include <linux/list.h>
#include <uapi/linux/ethtool.h>
/* Maximum current in uA according to IEEE 802.3-2022 Table 145-1 */
#define MAX_PI_CURRENT 1920000
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:
* @c33_pw_class: detected class of a powered PD
* IEEE 802.3-2022 30.9.1.1.8 aPSEPowerClassification
* @c33_actual_pw: power currently delivered by the PSE in mW
* IEEE 802.3-2022 30.9.1.1.23 aPSEActualPower
* @c33_ext_state_info: extended state information of the PSE
* @c33_avail_pw_limit: available power limit of the PSE in mW
* IEEE 802.3-2022 145.2.5.4 pse_avail_pwr
* @c33_pw_limit_ranges: supported power limit configuration range. The driver
* is in charge of the memory allocation.
* @c33_pw_limit_nb_ranges: number of supported power limit configuration
* ranges
*/
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;
u32 c33_pw_class;
u32 c33_actual_pw;
struct ethtool_c33_pse_ext_state_info c33_ext_state_info;
u32 c33_avail_pw_limit;
struct ethtool_c33_pse_pw_limit_range *c33_pw_limit_ranges;
u32 c33_pw_limit_nb_ranges;
};
/**
* struct pse_controller_ops - PSE controller driver callbacks
*
* @ethtool_get_status: get PSE control status for ethtool interface
* @setup_pi_matrix: setup PI matrix of the PSE controller
* @pi_is_enabled: Return 1 if the PSE PI is enabled, 0 if not.
* May also return negative errno.
* @pi_enable: Configure the PSE PI as enabled.
* @pi_disable: Configure the PSE PI as disabled.
* @pi_get_voltage: Return voltage similarly to get_voltage regulator
* callback.
* @pi_get_current_limit: Get the configured current limit similarly to
* get_current_limit regulator callback.
* @pi_set_current_limit: Configure the current limit similarly to
* set_current_limit regulator callback.
* Should not return an error in case of MAX_PI_CURRENT
* current value set.
*/
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 (*setup_pi_matrix)(struct pse_controller_dev *pcdev);
int (*pi_is_enabled)(struct pse_controller_dev *pcdev, int id);
int (*pi_enable)(struct pse_controller_dev *pcdev, int id);
int (*pi_disable)(struct pse_controller_dev *pcdev, int id);
int (*pi_get_voltage)(struct pse_controller_dev *pcdev, int id);
int (*pi_get_current_limit)(struct pse_controller_dev *pcdev,
int id);
int (*pi_set_current_limit)(struct pse_controller_dev *pcdev,
int id, int max_uA);
};
struct module;
struct device_node;
struct of_phandle_args;
struct pse_control;
/* PSE PI pairset pinout can either be Alternative A or Alternative B */
enum pse_pi_pairset_pinout {
ALTERNATIVE_A,
ALTERNATIVE_B,
};
/**
* struct pse_pi_pairset - PSE PI pairset entity describing the pinout
* alternative ant its phandle
*
* @pinout: description of the pinout alternative
* @np: device node pointer describing the pairset phandle
*/
struct pse_pi_pairset {
enum pse_pi_pairset_pinout pinout;
struct device_node *np;
};
/**
* struct pse_pi - PSE PI (Power Interface) entity as described in
* IEEE 802.3-2022 145.2.4
*
* @pairset: table of the PSE PI pinout alternative for the two pairset
* @np: device node pointer of the PSE PI node
* @rdev: regulator represented by the PSE PI
* @admin_state_enabled: PI enabled state
*/
struct pse_pi {
struct pse_pi_pairset pairset[2];
struct device_node *np;
struct regulator_dev *rdev;
bool admin_state_enabled;
};
/**
* 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
* @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
* @pi: table of PSE PIs described in this controller device
* @no_of_pse_pi: flag set if the pse_pis devicetree node is not used
*/
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;
unsigned int nr_lines;
struct mutex lock;
enum ethtool_pse_types types;
struct pse_pi *pi;
bool no_of_pse_pi;
};
#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);
int pse_ethtool_set_pw_limit(struct pse_control *psec,
struct netlink_ext_ack *extack,
const unsigned int pw_limit);
int pse_ethtool_get_pw_limit(struct pse_control *psec,
struct netlink_ext_ack *extack);
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 -EOPNOTSUPP;
}
static inline int pse_ethtool_set_config(struct pse_control *psec,
struct netlink_ext_ack *extack,
const struct pse_control_config *config)
{
return -EOPNOTSUPP;
}
static inline int pse_ethtool_set_pw_limit(struct pse_control *psec,
struct netlink_ext_ack *extack,
const unsigned int pw_limit)
{
return -EOPNOTSUPP;
}
static inline int pse_ethtool_get_pw_limit(struct pse_control *psec,
struct netlink_ext_ack *extack)
{
return -EOPNOTSUPP;
}
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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