/*********************************************************************
 *
 *      sir.h:  include file for irda-sir device abstraction layer
 *
 *      Copyright (c) 2002 Martin Diehl
 *
 *      This program is free software; you can redistribute it and/or 
 *      modify it under the terms of the GNU General Public License as 
 *      published by the Free Software Foundation; either version 2 of 
 *      the License, or (at your option) any later version.
 *
 ********************************************************************/

#ifndef IRDA_SIR_H
#define IRDA_SIR_H

#include <linux/netdevice.h>
#include <linux/workqueue.h>

#include <net/irda/irda.h>
#include <net/irda/irda_device.h>               // iobuff_t

struct sir_fsm {
        struct semaphore        sem;
        struct delayed_work     work;
        unsigned                state, substate;
        int                     param;
        int                     result;
};

#define SIRDEV_STATE_WAIT_TX_COMPLETE   0x0100

/* substates for wait_tx_complete */
#define SIRDEV_STATE_WAIT_XMIT          0x0101
#define SIRDEV_STATE_WAIT_UNTIL_SENT    0x0102
#define SIRDEV_STATE_TX_DONE            0x0103

#define SIRDEV_STATE_DONGLE_OPEN                0x0300

/* 0x0301-0x03ff reserved for individual dongle substates */

#define SIRDEV_STATE_DONGLE_CLOSE       0x0400

/* 0x0401-0x04ff reserved for individual dongle substates */

#define SIRDEV_STATE_SET_DTR_RTS                0x0500

#define SIRDEV_STATE_SET_SPEED          0x0700
#define SIRDEV_STATE_DONGLE_CHECK       0x0800
#define SIRDEV_STATE_DONGLE_RESET       0x0900

/* 0x0901-0x09ff reserved for individual dongle substates */

#define SIRDEV_STATE_DONGLE_SPEED       0x0a00
/* 0x0a01-0x0aff reserved for individual dongle substates */

#define SIRDEV_STATE_PORT_SPEED         0x0b00
#define SIRDEV_STATE_DONE               0x0c00
#define SIRDEV_STATE_ERROR              0x0d00
#define SIRDEV_STATE_COMPLETE           0x0e00

#define SIRDEV_STATE_DEAD               0xffff


struct sir_dev;

struct dongle_driver {

        struct module *owner;

        const char *driver_name;

        IRDA_DONGLE type;

        int     (*open)(struct sir_dev *dev);
        int     (*close)(struct sir_dev *dev);
        int     (*reset)(struct sir_dev *dev);
        int     (*set_speed)(struct sir_dev *dev, unsigned speed);

        struct list_head dongle_list;
};

struct sir_driver {

        struct module *owner;

        const char *driver_name;

        int qos_mtt_bits;

        int (*chars_in_buffer)(struct sir_dev *dev);
        void (*wait_until_sent)(struct sir_dev *dev);
        int (*set_speed)(struct sir_dev *dev, unsigned speed);
        int (*set_dtr_rts)(struct sir_dev *dev, int dtr, int rts);

        int (*do_write)(struct sir_dev *dev, const unsigned char *ptr, size_t len);

        int (*start_dev)(struct sir_dev *dev);
        int (*stop_dev)(struct sir_dev *dev);
};


/* exported */

int irda_register_dongle(struct dongle_driver *new);
int irda_unregister_dongle(struct dongle_driver *drv);

struct sir_dev *sirdev_get_instance(const struct sir_driver *drv,
                                    const char *name);
int sirdev_put_instance(struct sir_dev *self);

int sirdev_set_dongle(struct sir_dev *dev, IRDA_DONGLE type);
void sirdev_write_complete(struct sir_dev *dev);
int sirdev_receive(struct sir_dev *dev, const unsigned char *cp, size_t count);

/* low level helpers for SIR device/dongle setup */
int sirdev_raw_write(struct sir_dev *dev, const char *buf, int len);
int sirdev_raw_read(struct sir_dev *dev, char *buf, int len);
int sirdev_set_dtr_rts(struct sir_dev *dev, int dtr, int rts);

/* not exported */

int sirdev_get_dongle(struct sir_dev *self, IRDA_DONGLE type);
int sirdev_put_dongle(struct sir_dev *self);

void sirdev_enable_rx(struct sir_dev *dev);
int sirdev_schedule_request(struct sir_dev *dev, int state, unsigned param);

/* inline helpers */

static inline int sirdev_schedule_speed(struct sir_dev *dev, unsigned speed)
{
        return sirdev_schedule_request(dev, SIRDEV_STATE_SET_SPEED, speed);
}

static inline int sirdev_schedule_dongle_open(struct sir_dev *dev, int dongle_id)
{
        return sirdev_schedule_request(dev, SIRDEV_STATE_DONGLE_OPEN, dongle_id);
}

static inline int sirdev_schedule_dongle_close(struct sir_dev *dev)
{
        return sirdev_schedule_request(dev, SIRDEV_STATE_DONGLE_CLOSE, 0);
}

static inline int sirdev_schedule_dtr_rts(struct sir_dev *dev, int dtr, int rts)
{
        int     dtrrts;

        dtrrts = ((dtr) ? 0x02 : 0x00) | ((rts) ? 0x01 : 0x00);
        return sirdev_schedule_request(dev, SIRDEV_STATE_SET_DTR_RTS, dtrrts);
}

#if 0
static inline int sirdev_schedule_mode(struct sir_dev *dev, int mode)
{
        return sirdev_schedule_request(dev, SIRDEV_STATE_SET_MODE, mode);
}
#endif


struct sir_dev {
        struct net_device *netdev;

        struct irlap_cb    *irlap;

        struct qos_info qos;

        char hwname[32];

        struct sir_fsm fsm;
        atomic_t enable_rx;
        int raw_tx;
        spinlock_t tx_lock;

        u32 new_speed;
        u32 flags;

        unsigned        speed;

        iobuff_t tx_buff;          /* Transmit buffer */
        iobuff_t rx_buff;          /* Receive buffer */
        struct sk_buff *tx_skb;

        const struct dongle_driver * dongle_drv;
        const struct sir_driver * drv;
        void *priv;

};

#endif  /* IRDA_SIR_H */