1 /* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
2
3 #ifndef _SCC_H
4 #define _SCC_H
5
6
7 /* selection of hardware types */
8
9 #define PA0HZP 0x00 /* hardware type for PA0HZP SCC card and compatible */
10 #define EAGLE 0x01 /* hardware type for EAGLE card */
11 #define PC100 0x02 /* hardware type for PC100 card */
12 #define PRIMUS 0x04 /* hardware type for PRIMUS-PC (DG9BL) card */
13 #define DRSI 0x08 /* hardware type for DRSI PC*Packet card */
14 #define BAYCOM 0x10 /* hardware type for BayCom (U)SCC */
15
16 /* DEV ioctl() commands */
17
18 enum SCC_ioctl_cmds {
19 SIOCSCCRESERVED = SIOCDEVPRIVATE,
20 SIOCSCCCFG,
21 SIOCSCCINI,
22 SIOCSCCCHANINI,
23 SIOCSCCSMEM,
24 SIOCSCCGKISS,
25 SIOCSCCSKISS,
26 SIOCSCCGSTAT,
27 SIOCSCCCAL
28 };
29
30 /* Device parameter control (from WAMPES) */
31
32 enum L1_params {
33 PARAM_DATA,
34 PARAM_TXDELAY,
35 PARAM_PERSIST,
36 PARAM_SLOTTIME,
37 PARAM_TXTAIL,
38 PARAM_FULLDUP,
39 PARAM_SOFTDCD, /* was: PARAM_HW */
40 PARAM_MUTE, /* ??? */
41 PARAM_DTR,
42 PARAM_RTS,
43 PARAM_SPEED,
44 PARAM_ENDDELAY, /* ??? */
45 PARAM_GROUP,
46 PARAM_IDLE,
47 PARAM_MIN,
48 PARAM_MAXKEY,
49 PARAM_WAIT,
50 PARAM_MAXDEFER,
51 PARAM_TX,
52 PARAM_HWEVENT = 31,
53 PARAM_RETURN = 255 /* reset kiss mode */
54 };
55
56 /* fulldup parameter */
57
58 enum FULLDUP_modes {
59 KISS_DUPLEX_HALF, /* normal CSMA operation */
60 KISS_DUPLEX_FULL, /* fullduplex, key down trx after transmission */
61 KISS_DUPLEX_LINK, /* fullduplex, key down trx after 'idletime' sec */
62 KISS_DUPLEX_OPTIMA /* fullduplex, let the protocol layer control the hw */
63 };
64
65 /* misc. parameters */
66
67 #define TIMER_OFF 65535U /* to switch off timers */
68 #define NO_SUCH_PARAM 65534U /* param not implemented */
69
70 /* HWEVENT parameter */
71
72 enum HWEVENT_opts {
73 HWEV_DCD_ON,
74 HWEV_DCD_OFF,
75 HWEV_ALL_SENT
76 };
77
78 /* channel grouping */
79
80 #define RXGROUP 0100 /* if set, only tx when all channels clear */
81 #define TXGROUP 0200 /* if set, don't transmit simultaneously */
82
83 /* Tx/Rx clock sources */
84
85 enum CLOCK_sources {
86 CLK_DPLL, /* normal halfduplex operation */
87 CLK_EXTERNAL, /* external clocking (G3RUH/DF9IC modems) */
88 CLK_DIVIDER, /* Rx = DPLL, Tx = divider (fullduplex with */
89 /* modems without clock regeneration */
90 CLK_BRG /* experimental fullduplex mode with DPLL/BRG for */
91 /* MODEMs without clock recovery */
92 };
93
94 /* Tx state */
95
96 enum TX_state {
97 TXS_IDLE, /* Transmitter off, no data pending */
98 TXS_BUSY, /* waiting for permission to send / tailtime */
99 TXS_ACTIVE, /* Transmitter on, sending data */
100 TXS_NEWFRAME, /* reset CRC and send (next) frame */
101 TXS_IDLE2, /* Transmitter on, no data pending */
102 TXS_WAIT, /* Waiting for Mintime to expire */
103 TXS_TIMEOUT /* We had a transmission timeout */
104 };
105
106 typedef unsigned long io_port; /* type definition for an 'io port address' */
107
108 /* SCC statistical information */
109
110 struct scc_stat {
111 long rxints; /* Receiver interrupts */
112 long txints; /* Transmitter interrupts */
113 long exints; /* External/status interrupts */
114 long spints; /* Special receiver interrupts */
115
116 long txframes; /* Packets sent */
117 long rxframes; /* Number of Frames Actually Received */
118 long rxerrs; /* CRC Errors */
119 long txerrs; /* KISS errors */
120
121 unsigned int nospace; /* "Out of buffers" */
122 unsigned int rx_over; /* Receiver Overruns */
123 unsigned int tx_under; /* Transmitter Underruns */
124
125 unsigned int tx_state; /* Transmitter state */
126 int tx_queued; /* tx frames enqueued */
127
128 unsigned int maxqueue; /* allocated tx_buffers */
129 unsigned int bufsize; /* used buffersize */
130 };
131
132 struct scc_modem {
133 long speed; /* Line speed, bps */
134 char clocksrc; /* 0 = DPLL, 1 = external, 2 = divider */
135 char nrz; /* NRZ instead of NRZI */
136 };
137
138 struct scc_kiss_cmd {
139 int command; /* one of the KISS-Commands defined above */
140 unsigned param; /* KISS-Param */
141 };
142
143 struct scc_hw_config {
144 io_port data_a; /* data port channel A */
145 io_port ctrl_a; /* control port channel A */
146 io_port data_b; /* data port channel B */
147 io_port ctrl_b; /* control port channel B */
148 io_port vector_latch; /* INTACK-Latch (#) */
149 io_port special; /* special function port */
150
151 int irq; /* irq */
152 long clock; /* clock */
153 char option; /* command for function port */
154
155 char brand; /* hardware type */
156 char escc; /* use ext. features of a 8580/85180/85280 */
157 };
158
159 /* (#) only one INTACK latch allowed. */
160
161
162 struct scc_mem_config {
163 unsigned int dummy;
164 unsigned int bufsize;
165 };
166
167 struct scc_calibrate {
168 unsigned int time;
169 unsigned char pattern;
170 };
171
172 #ifdef __KERNEL__
173
174 enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */
175
176 /* Vector masks in RR2B */
177
178 #define VECTOR_MASK 0x06
179 #define TXINT 0x00
180 #define EXINT 0x02
181 #define RXINT 0x04
182 #define SPINT 0x06
183
184 #ifdef CONFIG_SCC_DELAY
185 #define Inb(port) inb_p(port)
186 #define Outb(port, val) outb_p(val, port)
187 #else
188 #define Inb(port) inb(port)
189 #define Outb(port, val) outb(val, port)
190 #endif
191
192 /* SCC channel control structure for KISS */
193
194 struct scc_kiss {
195 unsigned char txdelay; /* Transmit Delay 10 ms/cnt */
196 unsigned char persist; /* Persistence (0-255) as a % */
197 unsigned char slottime; /* Delay to wait on persistence hit */
198 unsigned char tailtime; /* Delay after last byte written */
199 unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
200 unsigned char waittime; /* Waittime before any transmit attempt */
201 unsigned int maxkeyup; /* Maximum time to transmit (seconds) */
202 unsigned int mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */
203 unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */
204 unsigned int maxdefer; /* Timer for CSMA channel busy limit */
205 unsigned char tx_inhibit; /* Transmit is not allowed when set */
206 unsigned char group; /* Group ID for AX.25 TX interlocking */
207 unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */
208 unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */
209 };
210
211
212 /* SCC channel structure */
213
214 struct scc_channel {
215 int init; /* channel exists? */
216
217 struct net_device *dev; /* link to device control structure */
218 struct net_device_stats dev_stat;/* device statistics */
219
220 char brand; /* manufacturer of the board */
221 long clock; /* used clock */
222
223 io_port ctrl; /* I/O address of CONTROL register */
224 io_port data; /* I/O address of DATA register */
225 io_port special; /* I/O address of special function port */
226 int irq; /* Number of Interrupt */
227
228 char option;
229 char enhanced; /* Enhanced SCC support */
230
231 unsigned char wreg[16]; /* Copy of last written value in WRx */
232 unsigned char status; /* Copy of R0 at last external interrupt */
233 unsigned char dcd; /* DCD status */
234
235 struct scc_kiss kiss; /* control structure for KISS params */
236 struct scc_stat stat; /* statistical information */
237 struct scc_modem modem; /* modem information */
238
239 struct sk_buff_head tx_queue; /* next tx buffer */
240 struct sk_buff *rx_buff; /* pointer to frame currently received */
241 struct sk_buff *tx_buff; /* pointer to frame currently transmitted */
242
243 /* Timer */
244 struct timer_list tx_t; /* tx timer for this channel */
245 struct timer_list tx_wdog; /* tx watchdogs */
246
247 /* Channel lock */
248 spinlock_t lock; /* Channel guard lock */
249 };
250
251 #endif /* defined(__KERNEL__) */
252 #endif /* defined(_SCC_H) */
253
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