WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/drivers/linuxc26/include/linux/hdlcdrv.h

Rev	Author	Line No.	Line
422	giacomo	1	/*
		2	* hdlcdrv.h -- HDLC packet radio network driver.
		3	* The Linux soundcard driver for 1200 baud and 9600 baud packet radio
		4	* (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
		5	*/
		6
		7	#ifndef _HDLCDRV_H
		8	#define _HDLCDRV_H
		9
		10	/* -------------------------------------------------------------------- */
		11	/*
		12	* structs for the IOCTL commands
		13	*/
		14
		15	struct hdlcdrv_params {
		16	int iobase;
		17	int irq;
		18	int dma;
		19	int dma2;
		20	int seriobase;
		21	int pariobase;
		22	int midiiobase;
		23	};
		24
		25	struct hdlcdrv_channel_params {
		26	int tx_delay; /* the transmitter keyup delay in 10ms units */
		27	int tx_tail; /* the transmitter keyoff delay in 10ms units */
		28	int slottime; /* the slottime in 10ms; usually 10 = 100ms */
		29	int ppersist; /* the p-persistence 0..255 */
		30	int fulldup; /* some driver do not support full duplex, setting */
		31	/* this just makes them send even if DCD is on */
		32	};
		33
		34	struct hdlcdrv_old_channel_state {
		35	int ptt;
		36	int dcd;
		37	int ptt_keyed;
		38	};
		39
		40	struct hdlcdrv_channel_state {
		41	int ptt;
		42	int dcd;
		43	int ptt_keyed;
		44	unsigned long tx_packets;
		45	unsigned long tx_errors;
		46	unsigned long rx_packets;
		47	unsigned long rx_errors;
		48	};
		49
		50	struct hdlcdrv_ioctl {
		51	int cmd;
		52	union {
		53	struct hdlcdrv_params mp;
		54	struct hdlcdrv_channel_params cp;
		55	struct hdlcdrv_channel_state cs;
		56	struct hdlcdrv_old_channel_state ocs;
		57	unsigned int calibrate;
		58	unsigned char bits;
		59	char modename[128];
		60	char drivername[32];
		61	} data;
		62	};
		63
		64	/* -------------------------------------------------------------------- */
		65
		66	/*
		67	* ioctl values
		68	*/
		69	#define HDLCDRVCTL_GETMODEMPAR 0
		70	#define HDLCDRVCTL_SETMODEMPAR 1
		71	#define HDLCDRVCTL_MODEMPARMASK 2 /* not handled by hdlcdrv */
		72	#define HDLCDRVCTL_GETCHANNELPAR 10
		73	#define HDLCDRVCTL_SETCHANNELPAR 11
		74	#define HDLCDRVCTL_OLDGETSTAT 20
		75	#define HDLCDRVCTL_CALIBRATE 21
		76	#define HDLCDRVCTL_GETSTAT 22
		77
		78	/*
		79	* these are mainly for debugging purposes
		80	*/
		81	#define HDLCDRVCTL_GETSAMPLES 30
		82	#define HDLCDRVCTL_GETBITS 31
		83
		84	/*
		85	* not handled by hdlcdrv, but by its depending drivers
		86	*/
		87	#define HDLCDRVCTL_GETMODE 40
		88	#define HDLCDRVCTL_SETMODE 41
		89	#define HDLCDRVCTL_MODELIST 42
		90	#define HDLCDRVCTL_DRIVERNAME 43
		91
		92	/*
		93	* mask of needed modem parameters, returned by HDLCDRVCTL_MODEMPARMASK
		94	*/
		95	#define HDLCDRV_PARMASK_IOBASE (1<<0)
		96	#define HDLCDRV_PARMASK_IRQ (1<<1)
		97	#define HDLCDRV_PARMASK_DMA (1<<2)
		98	#define HDLCDRV_PARMASK_DMA2 (1<<3)
		99	#define HDLCDRV_PARMASK_SERIOBASE (1<<4)
		100	#define HDLCDRV_PARMASK_PARIOBASE (1<<5)
		101	#define HDLCDRV_PARMASK_MIDIIOBASE (1<<6)
		102
		103	/* -------------------------------------------------------------------- */
		104
		105	#ifdef __KERNEL__
		106
		107	#include <linux/netdevice.h>
		108	#include <linux/if.h>
		109	#include <linux/spinlock.h>
		110
		111	#define HDLCDRV_MAGIC 0x5ac6e778
		112	#define HDLCDRV_HDLCBUFFER 32 /* should be a power of 2 for speed reasons */
		113	#define HDLCDRV_BITBUFFER 256 /* should be a power of 2 for speed reasons */
		114	#undef HDLCDRV_LOOPBACK /* define for HDLC debugging purposes */
		115	#define HDLCDRV_DEBUG
		116
		117	/* maximum packet length, excluding CRC */
		118	#define HDLCDRV_MAXFLEN 400
		119
		120
		121	struct hdlcdrv_hdlcbuffer {
		122	spinlock_t lock;
		123	unsigned rd, wr;
		124	unsigned short buf[HDLCDRV_HDLCBUFFER];
		125	};
		126
		127	#ifdef HDLCDRV_DEBUG
		128	struct hdlcdrv_bitbuffer {
		129	unsigned int rd;
		130	unsigned int wr;
		131	unsigned int shreg;
		132	unsigned char buffer[HDLCDRV_BITBUFFER];
		133	};
		134
		135	static inline void hdlcdrv_add_bitbuffer(struct hdlcdrv_bitbuffer *buf,
		136	unsigned int bit)
		137	{
		138	unsigned char new;
		139
		140	new = buf->shreg & 1;
		141	buf->shreg >>= 1;
		142	buf->shreg \|= (!!bit) << 7;
		143	if (new) {
		144	buf->buffer[buf->wr] = buf->shreg;
		145	buf->wr = (buf->wr+1) % sizeof(buf->buffer);
		146	buf->shreg = 0x80;
		147	}
		148	}
		149
		150	static inline void hdlcdrv_add_bitbuffer_word(struct hdlcdrv_bitbuffer *buf,
		151	unsigned int bits)
		152	{
		153	buf->buffer[buf->wr] = bits & 0xff;
		154	buf->wr = (buf->wr+1) % sizeof(buf->buffer);
		155	buf->buffer[buf->wr] = (bits >> 8) & 0xff;
		156	buf->wr = (buf->wr+1) % sizeof(buf->buffer);
		157
		158	}
		159	#endif /* HDLCDRV_DEBUG */
		160
		161	/* -------------------------------------------------------------------- */
		162	/*
		163	* Information that need to be kept for each driver.
		164	*/
		165
		166	struct hdlcdrv_ops {
		167	/*
		168	* first some informations needed by the hdlcdrv routines
		169	*/
		170	const char *drvname;
		171	const char *drvinfo;
		172	/*
		173	* the routines called by the hdlcdrv routines
		174	*/
		175	int (open)(struct net_device );
		176	int (close)(struct net_device );
		177	int (ioctl)(struct net_device , struct ifreq *,
		178	struct hdlcdrv_ioctl *, int);
		179	};
		180
		181	struct hdlcdrv_state {
		182	int magic;
		183	int opened;
		184
		185	const struct hdlcdrv_ops *ops;
		186
		187	struct {
		188	int bitrate;
		189	} par;
		190
		191	struct hdlcdrv_pttoutput {
		192	int dma2;
		193	int seriobase;
		194	int pariobase;
		195	int midiiobase;
		196	unsigned int flags;
		197	} ptt_out;
		198
		199	struct hdlcdrv_channel_params ch_params;
		200
		201	struct hdlcdrv_hdlcrx {
		202	struct hdlcdrv_hdlcbuffer hbuf;
		203	long in_hdlc_rx;
		204	/* 0 = sync hunt, != 0 receiving */
		205	int rx_state;
		206	unsigned int bitstream;
		207	unsigned int bitbuf;
		208	int numbits;
		209	unsigned char dcd;
		210
		211	int len;
		212	unsigned char *bp;
		213	unsigned char buffer[HDLCDRV_MAXFLEN+2];
		214	} hdlcrx;
		215
		216	struct hdlcdrv_hdlctx {
		217	struct hdlcdrv_hdlcbuffer hbuf;
		218	long in_hdlc_tx;
		219	/*
		220	* 0 = send flags
		221	* 1 = send txtail (flags)
		222	* 2 = send packet
		223	*/
		224	int tx_state;
		225	int numflags;
		226	unsigned int bitstream;
		227	unsigned char ptt;
		228	int calibrate;
		229	int slotcnt;
		230
		231	unsigned int bitbuf;
		232	int numbits;
		233
		234	int len;
		235	unsigned char *bp;
		236	unsigned char buffer[HDLCDRV_MAXFLEN+2];
		237	} hdlctx;
		238
		239	#ifdef HDLCDRV_DEBUG
		240	struct hdlcdrv_bitbuffer bitbuf_channel;
		241	struct hdlcdrv_bitbuffer bitbuf_hdlc;
		242	#endif /* HDLCDRV_DEBUG */
		243
		244	struct net_device_stats stats;
		245	int ptt_keyed;
		246
		247	/* queued skb for transmission */
		248	struct sk_buff *skb;
		249	};
		250
		251
		252	/* -------------------------------------------------------------------- */
		253
		254	static inline int hdlcdrv_hbuf_full(struct hdlcdrv_hdlcbuffer *hb)
		255	{
		256	unsigned long flags;
		257	int ret;
		258
		259	spin_lock_irqsave(&hb->lock, flags);
		260	ret = !((HDLCDRV_HDLCBUFFER - 1 + hb->rd - hb->wr) % HDLCDRV_HDLCBUFFER);
		261	spin_unlock_irqrestore(&hb->lock, flags);
		262	return ret;
		263	}
		264
		265	/* -------------------------------------------------------------------- */
		266
		267	static inline int hdlcdrv_hbuf_empty(struct hdlcdrv_hdlcbuffer *hb)
		268	{
		269	unsigned long flags;
		270	int ret;
		271
		272	spin_lock_irqsave(&hb->lock, flags);
		273	ret = (hb->rd == hb->wr);
		274	spin_unlock_irqrestore(&hb->lock, flags);
		275	return ret;
		276	}
		277
		278	/* -------------------------------------------------------------------- */
		279
		280	static inline unsigned short hdlcdrv_hbuf_get(struct hdlcdrv_hdlcbuffer *hb)
		281	{
		282	unsigned long flags;
		283	unsigned short val;
		284	unsigned newr;
		285
		286	spin_lock_irqsave(&hb->lock, flags);
		287	if (hb->rd == hb->wr)
		288	val = 0;
		289	else {
		290	newr = (hb->rd+1) % HDLCDRV_HDLCBUFFER;
		291	val = hb->buf[hb->rd];
		292	hb->rd = newr;
		293	}
		294	spin_unlock_irqrestore(&hb->lock, flags);
		295	return val;
		296	}
		297
		298	/* -------------------------------------------------------------------- */
		299
		300	static inline void hdlcdrv_hbuf_put(struct hdlcdrv_hdlcbuffer *hb,
		301	unsigned short val)
		302	{
		303	unsigned newp;
		304	unsigned long flags;
		305
		306	spin_lock_irqsave(&hb->lock, flags);
		307	newp = (hb->wr+1) % HDLCDRV_HDLCBUFFER;
		308	if (newp != hb->rd) {
		309	hb->buf[hb->wr] = val & 0xffff;
		310	hb->wr = newp;
		311	}
		312	spin_unlock_irqrestore(&hb->lock, flags);
		313	}
		314
		315	/* -------------------------------------------------------------------- */
		316
		317	static inline void hdlcdrv_putbits(struct hdlcdrv_state *s, unsigned int bits)
		318	{
		319	hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, bits);
		320	}
		321
		322	static inline unsigned int hdlcdrv_getbits(struct hdlcdrv_state *s)
		323	{
		324	unsigned int ret;
		325
		326	if (hdlcdrv_hbuf_empty(&s->hdlctx.hbuf)) {
		327	if (s->hdlctx.calibrate > 0)
		328	s->hdlctx.calibrate--;
		329	else
		330	s->hdlctx.ptt = 0;
		331	ret = 0;
		332	} else
		333	ret = hdlcdrv_hbuf_get(&s->hdlctx.hbuf);
		334	#ifdef HDLCDRV_LOOPBACK
		335	hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, ret);
		336	#endif /* HDLCDRV_LOOPBACK */
		337	return ret;
		338	}
		339
		340	static inline void hdlcdrv_channelbit(struct hdlcdrv_state *s, unsigned int bit)
		341	{
		342	#ifdef HDLCDRV_DEBUG
		343	hdlcdrv_add_bitbuffer(&s->bitbuf_channel, bit);
		344	#endif /* HDLCDRV_DEBUG */
		345	}
		346
		347	static inline void hdlcdrv_setdcd(struct hdlcdrv_state *s, int dcd)
		348	{
		349	s->hdlcrx.dcd = !!dcd;
		350	}
		351
		352	static inline int hdlcdrv_ptt(struct hdlcdrv_state *s)
		353	{
		354	return s->hdlctx.ptt \|\| (s->hdlctx.calibrate > 0);
		355	}
		356
		357	/* -------------------------------------------------------------------- */
		358
		359	void hdlcdrv_receiver(struct net_device , struct hdlcdrv_state );
		360	void hdlcdrv_transmitter(struct net_device , struct hdlcdrv_state );
		361	void hdlcdrv_arbitrate(struct net_device , struct hdlcdrv_state );
		362	struct net_device hdlcdrv_register(const struct hdlcdrv_ops ops,
		363	unsigned int privsize, const char *ifname,
		364	unsigned int baseaddr, unsigned int irq,
		365	unsigned int dma);
		366	void hdlcdrv_unregister(struct net_device *dev);
		367
		368	/* -------------------------------------------------------------------- */
		369
		370
		371
		372	#endif /* __KERNEL__ */
		373
		374	/* -------------------------------------------------------------------- */
		375
		376	#endif /* _HDLCDRV_H */
		377
		378	/* -------------------------------------------------------------------- */

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