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- /* SPDX-License-Identifier: GPL-2.0 */
- /* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
- #ifndef _SCC_H
- #define _SCC_H
- #include <uapi/linux/scc.h>
- 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 int 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 */
-
- /* Channel lock */
- spinlock_t lock; /* Channel guard lock */
- };
- #endif /* defined(_SCC_H) */
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