hdlcdrv.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:9k
- /*
- * 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;
- 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;
- 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;
- int 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 *);
- int hdlcdrv_register_hdlcdrv(struct net_device *dev, const struct hdlcdrv_ops *ops,
- unsigned int privsize, char *ifname,
- unsigned int baseaddr, unsigned int irq,
- unsigned int dma);
- int hdlcdrv_unregister_hdlcdrv(struct net_device *dev);
- /* -------------------------------------------------------------------- */
- #endif /* __KERNEL__ */
- /* -------------------------------------------------------------------- */
- #endif /* _HDLCDRV_H */
- /* -------------------------------------------------------------------- */