linux/include/linux/hdlcdrv.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * hdlcdrv.h  -- HDLC packet radio network driver.
 * The Linux soundcard driver for 1200 baud and 9600 baud packet radio
 * (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
 */
#ifndef _HDLCDRV_H
#define _HDLCDRV_H


#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/spinlock.h>
#include <uapi/linux/hdlcdrv.h>

#define HDLCDRV_MAGIC …
#define HDLCDRV_HDLCBUFFER …
#define HDLCDRV_BITBUFFER …
#undef HDLCDRV_LOOPBACK  /* define for HDLC debugging purposes */
#define HDLCDRV_DEBUG

/* maximum packet length, excluding CRC */
#define HDLCDRV_MAXFLEN …	


struct hdlcdrv_hdlcbuffer { … };

#ifdef HDLCDRV_DEBUG
struct hdlcdrv_bitbuffer { … };

static inline void hdlcdrv_add_bitbuffer(struct hdlcdrv_bitbuffer *buf, 
					 unsigned int bit)
{ … }

static inline void hdlcdrv_add_bitbuffer_word(struct hdlcdrv_bitbuffer *buf, 
					      unsigned int bits)
{ … }
#endif /* HDLCDRV_DEBUG */

/* -------------------------------------------------------------------- */
/*
 * Information that need to be kept for each driver. 
 */

struct hdlcdrv_ops { … };

struct hdlcdrv_state { … };


/* -------------------------------------------------------------------- */

static inline int hdlcdrv_hbuf_full(struct hdlcdrv_hdlcbuffer *hb) 
{ … }

/* -------------------------------------------------------------------- */

static inline int hdlcdrv_hbuf_empty(struct hdlcdrv_hdlcbuffer *hb)
{ … }

/* -------------------------------------------------------------------- */

static inline unsigned short hdlcdrv_hbuf_get(struct hdlcdrv_hdlcbuffer *hb)
{ … }

/* -------------------------------------------------------------------- */

static inline void hdlcdrv_hbuf_put(struct hdlcdrv_hdlcbuffer *hb, 
				    unsigned short val)
{ … }

/* -------------------------------------------------------------------- */

static inline void hdlcdrv_putbits(struct hdlcdrv_state *s, unsigned int bits)
{ … }

static inline unsigned int hdlcdrv_getbits(struct hdlcdrv_state *s)
{ … }

static inline void hdlcdrv_channelbit(struct hdlcdrv_state *s, unsigned int bit)
{ … }

static inline void hdlcdrv_setdcd(struct hdlcdrv_state *s, int dcd)
{ … }

static inline int hdlcdrv_ptt(struct hdlcdrv_state *s)
{ … }

/* -------------------------------------------------------------------- */

void hdlcdrv_receiver(struct net_device *, struct hdlcdrv_state *);
void hdlcdrv_transmitter(struct net_device *, struct hdlcdrv_state *);
void hdlcdrv_arbitrate(struct net_device *, struct hdlcdrv_state *);
struct net_device *hdlcdrv_register(const struct hdlcdrv_ops *ops,
				    unsigned int privsize, const char *ifname,
				    unsigned int baseaddr, unsigned int irq, 
				    unsigned int dma);
void hdlcdrv_unregister(struct net_device *dev);

/* -------------------------------------------------------------------- */



#endif /* _HDLCDRV_H */