/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *  PS3 virtual uart
 *
 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
 *  Copyright 2006 Sony Corp.
 */

#if !defined(_PS3_VUART_H)
#define _PS3_VUART_H

#include <asm/ps3.h>

struct ps3_vuart_stats {
        unsigned long bytes_written;
        unsigned long bytes_read;
        unsigned long tx_interrupts;
        unsigned long rx_interrupts;
        unsigned long disconnect_interrupts;
};

struct ps3_vuart_work {
        struct work_struct work;
        unsigned long trigger;
        struct ps3_system_bus_device *dev; /* to convert work to device */
};

/**
 * struct ps3_vuart_port_driver - a driver for a device on a vuart port
 */

struct ps3_vuart_port_driver {
        struct ps3_system_bus_driver core;
        int (*probe)(struct ps3_system_bus_device *);
        int (*remove)(struct ps3_system_bus_device *);
        void (*shutdown)(struct ps3_system_bus_device *);
        void (*work)(struct ps3_system_bus_device *);
        /* int (*tx_event)(struct ps3_system_bus_device *dev); */
        /* int (*rx_event)(struct ps3_system_bus_device *dev); */
        /* int (*disconnect_event)(struct ps3_system_bus_device *dev); */
        /* int (*suspend)(struct ps3_system_bus_device *, pm_message_t); */
        /* int (*resume)(struct ps3_system_bus_device *); */
};

int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv);
void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv);

static inline struct ps3_vuart_port_driver *
        ps3_system_bus_dev_to_vuart_drv(struct ps3_system_bus_device *_dev)
{
        struct ps3_system_bus_driver *sbd =
                ps3_system_bus_dev_to_system_bus_drv(_dev);
        BUG_ON(!sbd);
        return container_of(sbd, struct ps3_vuart_port_driver, core);
}
static inline struct ps3_system_bus_device *ps3_vuart_work_to_system_bus_dev(
        struct work_struct *_work)
{
        struct ps3_vuart_work *vw = container_of(_work, struct ps3_vuart_work,
                work);
        return vw->dev;
}

int ps3_vuart_write(struct ps3_system_bus_device *dev, const void *buf,
        unsigned int bytes);
int ps3_vuart_read(struct ps3_system_bus_device *dev, void *buf,
        unsigned int bytes);
int ps3_vuart_read_async(struct ps3_system_bus_device *dev, unsigned int bytes);
void ps3_vuart_cancel_async(struct ps3_system_bus_device *dev);
void ps3_vuart_clear_rx_bytes(struct ps3_system_bus_device *dev,
        unsigned int bytes);

struct vuart_triggers {
        unsigned long rx;
        unsigned long tx;
};

int ps3_vuart_get_triggers(struct ps3_system_bus_device *dev,
        struct vuart_triggers *trig);
int ps3_vuart_set_triggers(struct ps3_system_bus_device *dev, unsigned int tx,
        unsigned int rx);
int ps3_vuart_enable_interrupt_tx(struct ps3_system_bus_device *dev);
int ps3_vuart_disable_interrupt_tx(struct ps3_system_bus_device *dev);
int ps3_vuart_enable_interrupt_rx(struct ps3_system_bus_device *dev);
int ps3_vuart_disable_interrupt_rx(struct ps3_system_bus_device *dev);
int ps3_vuart_enable_interrupt_disconnect(struct ps3_system_bus_device *dev);
int ps3_vuart_disable_interrupt_disconnect(struct ps3_system_bus_device *dev);

#endif