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 | |
9 | enum {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 | |
29 | struct 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 | |
49 | struct 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 | |