root/include/linux/serio.h

INCLUDED FROM

DEFINITIONS

1. serio_write
2. serio_drv_write_wakeup
3. serio_get_drvdata
4. serio_set_drvdata
5. serio_pause_rx
6. serio_continue_rx

/*
 * Copyright (C) 1999-2002 Vojtech Pavlik
*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */
#ifndef _SERIO_H
#define _SERIO_H


#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <uapi/linux/serio.h>

struct serio {
        void *port_data;

        char name[32];
        char phys[32];
        char firmware_id[128];

        bool manual_bind;

        struct serio_device_id id;

        spinlock_t lock;                /* protects critical sections from port's interrupt handler */

        int (*write)(struct serio *, unsigned char);
        int (*open)(struct serio *);
        void (*close)(struct serio *);
        int (*start)(struct serio *);
        void (*stop)(struct serio *);

        struct serio *parent;
        struct list_head child_node;    /* Entry in parent->children list */
        struct list_head children;
        unsigned int depth;             /* level of nesting in serio hierarchy */

        struct serio_driver *drv;       /* accessed from interrupt, must be protected by serio->lock and serio->sem */
        struct mutex drv_mutex;         /* protects serio->drv so attributes can pin driver */

        struct device dev;

        struct list_head node;
};
#define to_serio_port(d)        container_of(d, struct serio, dev)

struct serio_driver {
        const char *description;

        const struct serio_device_id *id_table;
        bool manual_bind;

        void (*write_wakeup)(struct serio *);
        irqreturn_t (*interrupt)(struct serio *, unsigned char, unsigned int);
        int  (*connect)(struct serio *, struct serio_driver *drv);
        int  (*reconnect)(struct serio *);
        void (*disconnect)(struct serio *);
        void (*cleanup)(struct serio *);

        struct device_driver driver;
};
#define to_serio_driver(d)      container_of(d, struct serio_driver, driver)

int serio_open(struct serio *serio, struct serio_driver *drv);
void serio_close(struct serio *serio);
void serio_rescan(struct serio *serio);
void serio_reconnect(struct serio *serio);
irqreturn_t serio_interrupt(struct serio *serio, unsigned char data, unsigned int flags);

void __serio_register_port(struct serio *serio, struct module *owner);

/* use a define to avoid include chaining to get THIS_MODULE */
#define serio_register_port(serio) \
        __serio_register_port(serio, THIS_MODULE)

void serio_unregister_port(struct serio *serio);
void serio_unregister_child_port(struct serio *serio);

int __must_check __serio_register_driver(struct serio_driver *drv,
                                struct module *owner, const char *mod_name);

/* use a define to avoid include chaining to get THIS_MODULE & friends */
#define serio_register_driver(drv) \
        __serio_register_driver(drv, THIS_MODULE, KBUILD_MODNAME)

void serio_unregister_driver(struct serio_driver *drv);

/**
 * module_serio_driver() - Helper macro for registering a serio driver
 * @__serio_driver: serio_driver struct
 *
 * Helper macro for serio drivers which do not do anything special in
 * module init/exit. This eliminates a lot of boilerplate. Each module
 * may only use this macro once, and calling it replaces module_init()
 * and module_exit().
 */
#define module_serio_driver(__serio_driver) \
        module_driver(__serio_driver, serio_register_driver, \
                       serio_unregister_driver)

static inline int serio_write(struct serio *serio, unsigned char data)
{
        if (serio->write)
                return serio->write(serio, data);
        else
                return -1;
}

static inline void serio_drv_write_wakeup(struct serio *serio)
{
        if (serio->drv && serio->drv->write_wakeup)
                serio->drv->write_wakeup(serio);
}

/*
 * Use the following functions to manipulate serio's per-port
 * driver-specific data.
 */
static inline void *serio_get_drvdata(struct serio *serio)
{
        return dev_get_drvdata(&serio->dev);
}

static inline void serio_set_drvdata(struct serio *serio, void *data)
{
        dev_set_drvdata(&serio->dev, data);
}

/*
 * Use the following functions to protect critical sections in
 * driver code from port's interrupt handler
 */
static inline void serio_pause_rx(struct serio *serio)
{
        spin_lock_irq(&serio->lock);
}

static inline void serio_continue_rx(struct serio *serio)
{
        spin_unlock_irq(&serio->lock);
}

#endif