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/
usr/
src/
linux-headers-3.0.0-14-generic-pae/
include/
linux/
- drwxr-xr-x
|
Viewing file:  hdlcdrv.h (8.83 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* 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
/* -------------------------------------------------------------------- */
/*
* structs for the IOCTL commands
*/
struct hdlcdrv_params {
int iobase;
int irq;
int dma;
int dma2;
int seriobase;
int pariobase;
int midiiobase;
};
struct hdlcdrv_channel_params {
int tx_delay; /* the transmitter keyup delay in 10ms units */
int tx_tail; /* the transmitter keyoff delay in 10ms units */
int slottime; /* the slottime in 10ms; usually 10 = 100ms */
int ppersist; /* the p-persistence 0..255 */
int fulldup; /* some driver do not support full duplex, setting */
/* this just makes them send even if DCD is on */
};
struct hdlcdrv_old_channel_state {
int ptt;
int dcd;
int ptt_keyed;
};
struct hdlcdrv_channel_state {
int ptt;
int dcd;
int ptt_keyed;
unsigned long tx_packets;
unsigned long tx_errors;
unsigned long rx_packets;
unsigned long rx_errors;
};
struct hdlcdrv_ioctl {
int cmd;
union {
struct hdlcdrv_params mp;
struct hdlcdrv_channel_params cp;
struct hdlcdrv_channel_state cs;
struct hdlcdrv_old_channel_state ocs;
unsigned int calibrate;
unsigned char bits;
char modename[128];
char drivername[32];
} data;
};
/* -------------------------------------------------------------------- */
/*
* ioctl values
*/
#define HDLCDRVCTL_GETMODEMPAR 0
#define HDLCDRVCTL_SETMODEMPAR 1
#define HDLCDRVCTL_MODEMPARMASK 2 /* not handled by hdlcdrv */
#define HDLCDRVCTL_GETCHANNELPAR 10
#define HDLCDRVCTL_SETCHANNELPAR 11
#define HDLCDRVCTL_OLDGETSTAT 20
#define HDLCDRVCTL_CALIBRATE 21
#define HDLCDRVCTL_GETSTAT 22
/*
* these are mainly for debugging purposes
*/
#define HDLCDRVCTL_GETSAMPLES 30
#define HDLCDRVCTL_GETBITS 31
/*
* not handled by hdlcdrv, but by its depending drivers
*/
#define HDLCDRVCTL_GETMODE 40
#define HDLCDRVCTL_SETMODE 41
#define HDLCDRVCTL_MODELIST 42
#define HDLCDRVCTL_DRIVERNAME 43
/*
* mask of needed modem parameters, returned by HDLCDRVCTL_MODEMPARMASK
*/
#define HDLCDRV_PARMASK_IOBASE (1<<0)
#define HDLCDRV_PARMASK_IRQ (1<<1)
#define HDLCDRV_PARMASK_DMA (1<<2)
#define HDLCDRV_PARMASK_DMA2 (1<<3)
#define HDLCDRV_PARMASK_SERIOBASE (1<<4)
#define HDLCDRV_PARMASK_PARIOBASE (1<<5)
#define HDLCDRV_PARMASK_MIDIIOBASE (1<<6)
/* -------------------------------------------------------------------- */
#ifdef __KERNEL__
#include <linux/netdevice.h>
#include <linux/if.h>
#include <linux/spinlock.h>
#define HDLCDRV_MAGIC 0x5ac6e778
#define HDLCDRV_HDLCBUFFER 32 /* should be a power of 2 for speed reasons */
#define HDLCDRV_BITBUFFER 256 /* should be a power of 2 for speed reasons */
#undef HDLCDRV_LOOPBACK /* define for HDLC debugging purposes */
#define HDLCDRV_DEBUG
/* maximum packet length, excluding CRC */
#define HDLCDRV_MAXFLEN 400
struct hdlcdrv_hdlcbuffer {
spinlock_t lock;
unsigned rd, wr;
unsigned short buf[HDLCDRV_HDLCBUFFER];
};
#ifdef HDLCDRV_DEBUG
struct hdlcdrv_bitbuffer {
unsigned int rd;
unsigned int wr;
unsigned int shreg;
unsigned char buffer[HDLCDRV_BITBUFFER];
};
static inline void hdlcdrv_add_bitbuffer(struct hdlcdrv_bitbuffer *buf,
unsigned int bit)
{
unsigned char new;
new = buf->shreg & 1;
buf->shreg >>= 1;
buf->shreg |= (!!bit) << 7;
if (new) {
buf->buffer[buf->wr] = buf->shreg;
buf->wr = (buf->wr+1) % sizeof(buf->buffer);
buf->shreg = 0x80;
}
}
static inline void hdlcdrv_add_bitbuffer_word(struct hdlcdrv_bitbuffer *buf,
unsigned int bits)
{
buf->buffer[buf->wr] = bits & 0xff;
buf->wr = (buf->wr+1) % sizeof(buf->buffer);
buf->buffer[buf->wr] = (bits >> 8) & 0xff;
buf->wr = (buf->wr+1) % sizeof(buf->buffer);
}
#endif /* HDLCDRV_DEBUG */
/* -------------------------------------------------------------------- */
/*
* Information that need to be kept for each driver.
*/
struct hdlcdrv_ops {
/*
* first some informations needed by the hdlcdrv routines
*/
const char *drvname;
const char *drvinfo;
/*
* the routines called by the hdlcdrv routines
*/
int (*open)(struct net_device *);
int (*close)(struct net_device *);
int (*ioctl)(struct net_device *, struct ifreq *,
struct hdlcdrv_ioctl *, int);
};
struct hdlcdrv_state {
int magic;
int opened;
const struct hdlcdrv_ops *ops;
struct {
int bitrate;
} par;
struct hdlcdrv_pttoutput {
int dma2;
int seriobase;
int pariobase;
int midiiobase;
unsigned int flags;
} ptt_out;
struct hdlcdrv_channel_params ch_params;
struct hdlcdrv_hdlcrx {
struct hdlcdrv_hdlcbuffer hbuf;
unsigned long in_hdlc_rx;
/* 0 = sync hunt, != 0 receiving */
int rx_state;
unsigned int bitstream;
unsigned int bitbuf;
int numbits;
unsigned char dcd;
int len;
unsigned char *bp;
unsigned char buffer[HDLCDRV_MAXFLEN+2];
} hdlcrx;
struct hdlcdrv_hdlctx {
struct hdlcdrv_hdlcbuffer hbuf;
unsigned long in_hdlc_tx;
/*
* 0 = send flags
* 1 = send txtail (flags)
* 2 = send packet
*/
int tx_state;
int numflags;
unsigned int bitstream;
unsigned char ptt;
int calibrate;
int slotcnt;
unsigned int bitbuf;
int numbits;
int len;
unsigned char *bp;
unsigned char buffer[HDLCDRV_MAXFLEN+2];
} hdlctx;
#ifdef HDLCDRV_DEBUG
struct hdlcdrv_bitbuffer bitbuf_channel;
struct hdlcdrv_bitbuffer bitbuf_hdlc;
#endif /* HDLCDRV_DEBUG */
int ptt_keyed;
/* queued skb for transmission */
struct sk_buff *skb;
};
/* -------------------------------------------------------------------- */
static inline int hdlcdrv_hbuf_full(struct hdlcdrv_hdlcbuffer *hb)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&hb->lock, flags);
ret = !((HDLCDRV_HDLCBUFFER - 1 + hb->rd - hb->wr) % HDLCDRV_HDLCBUFFER);
spin_unlock_irqrestore(&hb->lock, flags);
return ret;
}
/* -------------------------------------------------------------------- */
static inline int hdlcdrv_hbuf_empty(struct hdlcdrv_hdlcbuffer *hb)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&hb->lock, flags);
ret = (hb->rd == hb->wr);
spin_unlock_irqrestore(&hb->lock, flags);
return ret;
}
/* -------------------------------------------------------------------- */
static inline unsigned short hdlcdrv_hbuf_get(struct hdlcdrv_hdlcbuffer *hb)
{
unsigned long flags;
unsigned short val;
unsigned newr;
spin_lock_irqsave(&hb->lock, flags);
if (hb->rd == hb->wr)
val = 0;
else {
newr = (hb->rd+1) % HDLCDRV_HDLCBUFFER;
val = hb->buf[hb->rd];
hb->rd = newr;
}
spin_unlock_irqrestore(&hb->lock, flags);
return val;
}
/* -------------------------------------------------------------------- */
static inline void hdlcdrv_hbuf_put(struct hdlcdrv_hdlcbuffer *hb,
unsigned short val)
{
unsigned newp;
unsigned long flags;
spin_lock_irqsave(&hb->lock, flags);
newp = (hb->wr+1) % HDLCDRV_HDLCBUFFER;
if (newp != hb->rd) {
hb->buf[hb->wr] = val & 0xffff;
hb->wr = newp;
}
spin_unlock_irqrestore(&hb->lock, flags);
}
/* -------------------------------------------------------------------- */
static inline void hdlcdrv_putbits(struct hdlcdrv_state *s, unsigned int bits)
{
hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, bits);
}
static inline unsigned int hdlcdrv_getbits(struct hdlcdrv_state *s)
{
unsigned int ret;
if (hdlcdrv_hbuf_empty(&s->hdlctx.hbuf)) {
if (s->hdlctx.calibrate > 0)
s->hdlctx.calibrate--;
else
s->hdlctx.ptt = 0;
ret = 0;
} else
ret = hdlcdrv_hbuf_get(&s->hdlctx.hbuf);
#ifdef HDLCDRV_LOOPBACK
hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, ret);
#endif /* HDLCDRV_LOOPBACK */
return ret;
}
static inline void hdlcdrv_channelbit(struct hdlcdrv_state *s, unsigned int bit)
{
#ifdef HDLCDRV_DEBUG
hdlcdrv_add_bitbuffer(&s->bitbuf_channel, bit);
#endif /* HDLCDRV_DEBUG */
}
static inline void hdlcdrv_setdcd(struct hdlcdrv_state *s, int dcd)
{
s->hdlcrx.dcd = !!dcd;
}
static inline int hdlcdrv_ptt(struct hdlcdrv_state *s)
{
return s->hdlctx.ptt || (s->hdlctx.calibrate > 0);
}
/* -------------------------------------------------------------------- */
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 /* __KERNEL__ */
/* -------------------------------------------------------------------- */
#endif /* _HDLCDRV_H */
/* -------------------------------------------------------------------- */
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