1/* SPDX-License-Identifier: GPL-2.0 */
2/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
3#ifndef	_SCC_H
4#define	_SCC_H
5
6#include <uapi/linux/scc.h>
7
8
9enum {TX_OFF, TX_ON};	/* command for scc_key_trx() */
10
11/* Vector masks in RR2B */
12
13#define VECTOR_MASK	0x06
14#define TXINT		0x00
15#define EXINT		0x02
16#define RXINT		0x04
17#define SPINT		0x06
18
19#ifdef CONFIG_SCC_DELAY
20#define Inb(port)	inb_p(port)
21#define Outb(port, val)	outb_p(val, port)
22#else
23#define Inb(port)	inb(port)
24#define Outb(port, val)	outb(val, port)
25#endif
26
27/* SCC channel control structure for KISS */
28
29struct scc_kiss {
30	unsigned char txdelay;		/* Transmit Delay 10 ms/cnt */
31	unsigned char persist;		/* Persistence (0-255) as a % */
32	unsigned char slottime;		/* Delay to wait on persistence hit */
33	unsigned char tailtime;		/* Delay after last byte written */
34	unsigned char fulldup;		/* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
35	unsigned char waittime;		/* Waittime before any transmit attempt */
36	unsigned int  maxkeyup;		/* Maximum time to transmit (seconds) */
37	unsigned int  mintime;		/* Minimal offtime after MAXKEYUP timeout (seconds) */
38	unsigned int  idletime;		/* Maximum idle time in ALWAYS KEYED mode (seconds) */
39	unsigned int  maxdefer;		/* Timer for CSMA channel busy limit */
40	unsigned char tx_inhibit;	/* Transmit is not allowed when set */
41	unsigned char group;		/* Group ID for AX.25 TX interlocking */
42	unsigned char mode;		/* 'normal' or 'hwctrl' mode (unused) */
43	unsigned char softdcd;		/* Use DPLL instead of DCD pin for carrier detect */
44};
45
46
47/* SCC channel structure */
48
49struct scc_channel {
50	int init;			/* channel exists? */
51
52	struct net_device *dev;		/* link to device control structure */
53	struct net_device_stats dev_stat;/* device statistics */
54
55	char brand;			/* manufacturer of the board */
56	long clock;			/* used clock */
57
58	io_port ctrl;			/* I/O address of CONTROL register */
59	io_port	data;			/* I/O address of DATA register */
60	io_port special;		/* I/O address of special function port */
61	int irq;			/* Number of Interrupt */
62
63	char option;
64	char enhanced;			/* Enhanced SCC support */
65
66	unsigned char wreg[16]; 	/* Copy of last written value in WRx */
67	unsigned char status;		/* Copy of R0 at last external interrupt */
68	unsigned char dcd;		/* DCD status */
69
70        struct scc_kiss kiss;		/* control structure for KISS params */
71        struct scc_stat stat;		/* statistical information */
72        struct scc_modem modem; 	/* modem information */
73
74        struct sk_buff_head tx_queue;	/* next tx buffer */
75        struct sk_buff *rx_buff;	/* pointer to frame currently received */
76        struct sk_buff *tx_buff;	/* pointer to frame currently transmitted */
77
78	/* Timer */
79	struct timer_list tx_t;		/* tx timer for this channel */
80	struct timer_list tx_wdog;	/* tx watchdogs */
81
82	/* Channel lock */
83	spinlock_t	lock;		/* Channel guard lock */
84};
85
86#endif /* defined(_SCC_H) */
87