87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
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#ifndef _SCC_H
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#define _SCC_H
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#include <uapi/linux/scc.h>
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enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */
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/* Vector masks in RR2B */
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#define VECTOR_MASK 0x06
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#define TXINT 0x00
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#define EXINT 0x02
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#define RXINT 0x04
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#define SPINT 0x06
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#ifdef CONFIG_SCC_DELAY
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#define Inb(port) inb_p(port)
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#define Outb(port, val) outb_p(val, port)
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#else
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#define Inb(port) inb(port)
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#define Outb(port, val) outb(val, port)
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#endif
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/* SCC channel control structure for KISS */
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struct scc_kiss {
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unsigned char txdelay; /* Transmit Delay 10 ms/cnt */
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unsigned char persist; /* Persistence (0-255) as a % */
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unsigned char slottime; /* Delay to wait on persistence hit */
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unsigned char tailtime; /* Delay after last byte written */
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unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
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unsigned char waittime; /* Waittime before any transmit attempt */
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unsigned int maxkeyup; /* Maximum time to transmit (seconds) */
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unsigned int mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */
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unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */
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unsigned int maxdefer; /* Timer for CSMA channel busy limit */
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unsigned char tx_inhibit; /* Transmit is not allowed when set */
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unsigned char group; /* Group ID for AX.25 TX interlocking */
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unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */
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unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */
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};
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/* SCC channel structure */
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struct scc_channel {
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int init; /* channel exists? */
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struct net_device *dev; /* link to device control structure */
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struct net_device_stats dev_stat;/* device statistics */
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char brand; /* manufacturer of the board */
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long clock; /* used clock */
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io_port ctrl; /* I/O address of CONTROL register */
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io_port data; /* I/O address of DATA register */
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io_port special; /* I/O address of special function port */
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int irq; /* Number of Interrupt */
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char option;
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char enhanced; /* Enhanced SCC support */
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unsigned char wreg[16]; /* Copy of last written value in WRx */
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unsigned char status; /* Copy of R0 at last external interrupt */
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unsigned char dcd; /* DCD status */
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struct scc_kiss kiss; /* control structure for KISS params */
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struct scc_stat stat; /* statistical information */
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struct scc_modem modem; /* modem information */
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struct sk_buff_head tx_queue; /* next tx buffer */
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struct sk_buff *rx_buff; /* pointer to frame currently received */
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struct sk_buff *tx_buff; /* pointer to frame currently transmitted */
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/* Timer */
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struct timer_list tx_t; /* tx timer for this channel */
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struct timer_list tx_wdog; /* tx watchdogs */
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/* Channel lock */
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spinlock_t lock; /* Channel guard lock */
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};
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#endif /* defined(_SCC_H) */
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