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/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
#ifndef _SCC_H
#define _SCC_H
#include <linux/config.h>
/* selection of hardware types */
#define PA0HZP 0x00 /* hardware type for PA0HZP SCC card and compatible */
#define EAGLE 0x01 /* hardware type for EAGLE card */
#define PC100 0x02 /* hardware type for PC100 card */
#define PRIMUS 0x04 /* hardware type for PRIMUS-PC (DG9BL) card */
#define DRSI 0x08 /* hardware type for DRSI PC*Packet card */
#define BAYCOM 0x10 /* hardware type for BayCom (U)SCC */
/* DEV ioctl() commands */
enum SCC_ioctl_cmds {
SIOCSCCRESERVED = SIOCDEVPRIVATE,
SIOCSCCCFG,
SIOCSCCINI,
SIOCSCCCHANINI,
SIOCSCCSMEM,
SIOCSCCGKISS,
SIOCSCCSKISS,
SIOCSCCGSTAT,
SIOCSCCCAL
};
/* magic number */
#define SCC_MAGIC 0x8530 /* ;-) */
/* Device parameter control (from WAMPES) */
enum L1_params {
PARAM_DATA,
PARAM_TXDELAY,
PARAM_PERSIST,
PARAM_SLOTTIME,
PARAM_TXTAIL,
PARAM_FULLDUP,
PARAM_SOFTDCD, /* was: PARAM_HW */
PARAM_MUTE, /* ??? */
PARAM_DTR,
PARAM_RTS,
PARAM_SPEED,
PARAM_ENDDELAY, /* ??? */
PARAM_GROUP,
PARAM_IDLE,
PARAM_MIN,
PARAM_MAXKEY,
PARAM_WAIT,
PARAM_MAXDEFER,
PARAM_TX,
PARAM_HWEVENT = 31,
PARAM_RETURN = 255 /* reset kiss mode */
};
/* fulldup parameter */
enum FULLDUP_modes {
KISS_DUPLEX_HALF, /* normal CSMA operation */
KISS_DUPLEX_FULL, /* fullduplex, key down trx after transmission */
KISS_DUPLEX_LINK, /* fullduplex, key down trx after 'idletime' sec */
KISS_DUPLEX_OPTIMA /* fullduplex, let the protocol layer control the hw */
};
/* misc. parameters */
#define TIMER_OFF 65535U /* to switch off timers */
#define NO_SUCH_PARAM 65534U /* param not implemented */
/* HWEVENT parameter */
enum HWEVENT_opts {
HWEV_DCD_ON,
HWEV_DCD_OFF,
HWEV_ALL_SENT
};
/* channel grouping */
#define RXGROUP 0100 /* if set, only tx when all channels clear */
#define TXGROUP 0200 /* if set, don't transmit simultaneously */
/* Tx/Rx clock sources */
enum CLOCK_sources {
CLK_DPLL, /* normal halfduplex operation */
CLK_EXTERNAL, /* external clocking (G3RUH/DF9IC modems) */
CLK_DIVIDER, /* Rx = DPLL, Tx = divider (fullduplex with */
/* modems without clock regeneration */
CLK_BRG /* experimental fullduplex mode with DPLL/BRG for */
/* MODEMs without clock recovery */
};
/* Tx state */
enum TX_state {
TXS_IDLE, /* Transmitter off, no data pending */
TXS_BUSY, /* waiting for permission to send / tailtime */
TXS_ACTIVE, /* Transmitter on, sending data */
TXS_NEWFRAME, /* reset CRC and send (next) frame */
TXS_IDLE2, /* Transmitter on, no data pending */
TXS_WAIT, /* Waiting for Mintime to expire */
TXS_TIMEOUT /* We had a transmission timeout */
};
typedef unsigned long io_port; /* type definition for an 'io port address' */
/* SCC statistical information */
struct scc_stat {
long rxints; /* Receiver interrupts */
long txints; /* Transmitter interrupts */
long exints; /* External/status interrupts */
long spints; /* Special receiver interrupts */
long txframes; /* Packets sent */
long rxframes; /* Number of Frames Actually Received */
long rxerrs; /* CRC Errors */
long txerrs; /* KISS errors */
unsigned int nospace; /* "Out of buffers" */
unsigned int rx_over; /* Receiver Overruns */
unsigned int tx_under; /* Transmitter Underruns */
unsigned int tx_state; /* Transmitter state */
int tx_queued; /* tx frames enqueued */
unsigned int maxqueue; /* allocated tx_buffers */
unsigned int bufsize; /* used buffersize */
};
struct scc_modem {
long speed; /* Line speed, bps */
char clocksrc; /* 0 = DPLL, 1 = external, 2 = divider */
char nrz; /* NRZ instead of NRZI */
};
struct scc_kiss_cmd {
int command; /* one of the KISS-Commands defined above */
unsigned param; /* KISS-Param */
};
struct scc_hw_config {
io_port data_a; /* data port channel A */
io_port ctrl_a; /* control port channel A */
io_port data_b; /* data port channel B */
io_port ctrl_b; /* control port channel B */
io_port vector_latch; /* INTACK-Latch (#) */
io_port special; /* special function port */
int irq; /* irq */
long clock; /* clock */
char option; /* command for function port */
char brand; /* hardware type */
char escc; /* use ext. features of a 8580/85180/85280 */
};
/* (#) only one INTACK latch allowed. */
struct scc_mem_config {
unsigned int dummy;
unsigned int bufsize;
};
struct scc_calibrate {
unsigned int time;
unsigned char pattern;
};
#ifdef __KERNEL__
enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */
/* Vector masks in RR2B */
#define VECTOR_MASK 0x06
#define TXINT 0x00
#define EXINT 0x02
#define RXINT 0x04
#define SPINT 0x06
#ifdef CONFIG_SCC_DELAY
#define Inb(port) inb_p(port)
#define Outb(port, val) outb_p(val, port)
#else
#define Inb(port) inb(port)
#define Outb(port, val) outb(val, port)
#endif
/* SCC channel control structure for KISS */
struct scc_kiss {
unsigned char txdelay; /* Transmit Delay 10 ms/cnt */
unsigned char persist; /* Persistence (0-255) as a % */
unsigned char slottime; /* Delay to wait on persistence hit */
unsigned char tailtime; /* Delay after last byte written */
unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
unsigned char waittime; /* Waittime before any transmit attempt */
unsigned int maxkeyup; /* Maximum time to transmit (seconds) */
unsigned char mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */
unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */
unsigned int maxdefer; /* Timer for CSMA channel busy limit */
unsigned char tx_inhibit; /* Transmit is not allowed when set */
unsigned char group; /* Group ID for AX.25 TX interlocking */
unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */
unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */
};
/* SCC channel structure */
struct scc_channel {
int magic; /* magic word */
int init; /* channel exists? */
struct device *dev; /* link to device control structure */
struct net_device_stats dev_stat;/* device statistics */
char brand; /* manufacturer of the board */
long clock; /* used clock */
io_port ctrl; /* I/O address of CONTROL register */
io_port data; /* I/O address of DATA register */
io_port special; /* I/O address of special function port */
int irq; /* Number of Interrupt */
char option;
char enhanced; /* Enhanced SCC support */
unsigned char wreg[16]; /* Copy of last written value in WRx */
unsigned char status; /* Copy of R0 at last external interrupt */
unsigned char dcd; /* DCD status */
struct scc_kiss kiss; /* control structure for KISS params */
struct scc_stat stat; /* statistical information */
struct scc_modem modem; /* modem information */
struct sk_buff_head tx_queue; /* next tx buffer */
struct sk_buff *rx_buff; /* pointer to frame currently received */
struct sk_buff *tx_buff; /* pointer to frame currently transmitted */
/* Timer */
struct timer_list tx_t; /* tx timer for this channel */
struct timer_list tx_wdog; /* tx watchdogs */
};
int scc_init(void);
#endif /* defined(__KERNEL__) */
#endif /* defined(_SCC_H) */
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