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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* virtio_rtc internal interfaces
*
* Copyright (C) 2022-2023 OpenSynergy GmbH
* Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#ifndef _VIRTIO_RTC_INTERNAL_H_
#define _VIRTIO_RTC_INTERNAL_H_
#include <linux/device.h>
#include <linux/err.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/types.h>
/* driver core IFs */
struct viortc_dev;
int viortc_read(struct viortc_dev *viortc, u16 vio_clk_id, u64 *reading);
int viortc_read_cross(struct viortc_dev *viortc, u16 vio_clk_id, u8 hw_counter,
u64 *reading, u64 *cycles);
int viortc_cross_cap(struct viortc_dev *viortc, u16 vio_clk_id, u8 hw_counter,
bool *supported);
int viortc_read_alarm(struct viortc_dev *viortc, u16 vio_clk_id,
u64 *alarm_time, bool *enabled);
int viortc_set_alarm(struct viortc_dev *viortc, u16 vio_clk_id, u64 alarm_time,
bool alarm_enable);
int viortc_set_alarm_enabled(struct viortc_dev *viortc, u16 vio_clk_id,
bool alarm_enable);
struct viortc_class;
struct viortc_class *viortc_class_from_dev(struct device *dev);
/* PTP IFs */
struct viortc_ptp_clock;
#if IS_ENABLED(CONFIG_VIRTIO_RTC_PTP)
struct viortc_ptp_clock *viortc_ptp_register(struct viortc_dev *viortc,
struct device *parent_dev,
u16 vio_clk_id,
const char *ptp_clock_name);
int viortc_ptp_unregister(struct viortc_ptp_clock *vio_ptp,
struct device *parent_dev);
#else
static inline struct viortc_ptp_clock *
viortc_ptp_register(struct viortc_dev *viortc, struct device *parent_dev,
u16 vio_clk_id, const char *ptp_clock_name)
{
return NULL;
}
static inline int viortc_ptp_unregister(struct viortc_ptp_clock *vio_ptp,
struct device *parent_dev)
{
return -ENODEV;
}
#endif
/* HW counter IFs */
/**
* viortc_hw_xtstamp_params() - get HW-specific xtstamp params
* @hw_counter: virtio_rtc HW counter type
* @cs_id: clocksource id corresponding to hw_counter
*
* Gets the HW-specific xtstamp params. Returns an error if the driver cannot
* support xtstamp.
*
* Context: Process context.
* Return: Zero on success, negative error code otherwise.
*/
int viortc_hw_xtstamp_params(u8 *hw_counter, enum clocksource_ids *cs_id);
/* RTC class IFs */
#if IS_ENABLED(CONFIG_VIRTIO_RTC_CLASS)
void viortc_class_alarm(struct viortc_class *viortc_class, u16 vio_clk_id);
void viortc_class_stop(struct viortc_class *viortc_class);
int viortc_class_register(struct viortc_class *viortc_class);
struct viortc_class *viortc_class_init(struct viortc_dev *viortc,
u16 vio_clk_id, bool have_alarm,
struct device *parent_dev);
#else /* CONFIG_VIRTIO_RTC_CLASS */
static inline void viortc_class_alarm(struct viortc_class *viortc_class,
u16 vio_clk_id)
{
}
static inline void viortc_class_stop(struct viortc_class *viortc_class)
{
}
static inline int viortc_class_register(struct viortc_class *viortc_class)
{
return -ENODEV;
}
static inline struct viortc_class *viortc_class_init(struct viortc_dev *viortc,
u16 vio_clk_id,
bool have_alarm,
struct device *parent_dev)
{
return ERR_PTR(-ENODEV);
}
#endif /* CONFIG_VIRTIO_RTC_CLASS */
#endif /* _VIRTIO_RTC_INTERNAL_H_ */
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