projects/linux·blob v3.16 · refs

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