mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
64b33619a3
deal with signedness of the stuff passed to set_bit() et.al. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
378 lines
8.9 KiB
C
378 lines
8.9 KiB
C
/*
|
|
* 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;
|
|
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 */
|
|
|
|
struct net_device_stats stats;
|
|
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 */
|
|
|
|
/* -------------------------------------------------------------------- */
|