scc.h
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上传日期:2013-02-24
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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
- };
- /* 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 init; /* channel exists? */
- struct net_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 */
- };
- #endif /* defined(__KERNEL__) */
- #endif /* defined(_SCC_H) */