1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* Mach Operating System
* Copyright (c) 1993-1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*
* Compatibility TTY structure for existing TTY device drivers.
*/
#ifndef _DEVICE_TTY_H_
#define _DEVICE_TTY_H_
#include <kern/lock.h>
#include <kern/queue.h>
#include <mach/port.h>
#include <device/device_types.h>
#include <device/tty_status.h>
#include <device/cirbuf.h>
#include <device/io_req.h>
struct tty {
decl_simple_lock_data(,t_lock)
struct cirbuf t_inq; /* input buffer */
struct cirbuf t_outq; /* output buffer */
char * t_addr; /* device pointer */
int t_dev; /* device number */
void (*t_start)(struct tty *);
/* routine to start output */
#define t_oproc t_start
void (*t_stop)(struct tty *, int);
/* routine to stop output */
int (*t_mctl)(struct tty *, int, int);
/* (optional) routine to control
modem signals */
unsigned char t_ispeed; /* input speed */
unsigned char t_ospeed; /* output speed */
char t_breakc; /* character to deliver when 'break'
condition received */
int t_flags; /* mode flags */
int t_state; /* current state */
int t_line; /* fake line discipline number,
for old drivers - always 0 */
queue_head_t t_delayed_read; /* pending read requests */
queue_head_t t_delayed_write;/* pending write requests */
queue_head_t t_delayed_open; /* pending open requests */
/*
* Items beyond this point should be removed to device-specific
* extension structures.
*/
int (*t_getstat)(); /* routine to get status */
int (*t_setstat)(); /* routine to set status */
dev_ops_t t_tops; /* another device to possibly
push through */
};
typedef struct tty *tty_t;
/*
* Common TTY service routines
*/
extern io_return_t char_open(
int dev,
struct tty * tp,
dev_mode_t mode,
io_req_t ior);
extern io_return_t char_read(
struct tty * tp,
io_req_t ior);
extern io_return_t char_write(
struct tty * tp,
io_req_t ior);
extern void ttyinput(
unsigned int c,
struct tty * tp);
extern void ttyinput_many(
struct tty * tp,
char * chars,
int count);
extern boolean_t ttymodem(
struct tty * tp,
boolean_t carrier_up);
extern void tty_cts(
struct tty * tp,
boolean_t cts_up);
extern void tty_queue_completion(
queue_t queue);
#define tt_open_wakeup(tp) \
(tty_queue_completion(&(tp)->t_delayed_open))
#define tt_write_wakeup(tp) \
(tty_queue_completion(&(tp)->t_delayed_write))
extern void ttychars(
struct tty * tp);
#define TTMINBUF 90
short tthiwat[NSPEEDS], ttlowat[NSPEEDS];
#define TTHIWAT(tp) tthiwat[(tp)->t_ospeed]
#define TTLOWAT(tp) ttlowat[(tp)->t_ospeed]
extern io_return_t tty_get_status(
struct tty * tp,
dev_flavor_t flavor,
int * data,
natural_t * count);
extern io_return_t tty_set_status(
struct tty * tp,
dev_flavor_t flavor,
int * data,
natural_t count);
extern void tty_flush(
struct tty * tp,
int rw);
extern void ttrstrt(
struct tty * tp);
extern void ttstart(
struct tty * tp);
extern void ttyclose(
struct tty * tp);
extern boolean_t tty_portdeath(
struct tty * tp,
ipc_port_t port);
/* internal state bits */
#define TS_INIT 0x00000001 /* tty structure initialized */
#define TS_TIMEOUT 0x00000002 /* delay timeout in progress */
#define TS_WOPEN 0x00000004 /* waiting for open to complete */
#define TS_ISOPEN 0x00000008 /* device is open */
#define TS_FLUSH 0x00000010 /* outq has been flushed during DMA */
#define TS_CARR_ON 0x00000020 /* software copy of carrier-present */
#define TS_BUSY 0x00000040 /* output in progress */
#define TS_ASLEEP 0x00000080 /* wakeup when output done */
#define TS_TTSTOP 0x00000100 /* output stopped by ctl-s */
#define TS_HUPCLS 0x00000200 /* hang up upon last close */
#define TS_TBLOCK 0x00000400 /* tandem queue blocked */
#define TS_NBIO 0x00001000 /* tty in non-blocking mode */
#define TS_ONDELAY 0x00002000 /* device is open; software copy of
* carrier is not present */
#define TS_MIN 0x00004000 /* buffer input chars, if possible */
#define TS_MIN_TO 0x00008000 /* timeout for the above is active */
#define TS_OUT 0x00010000 /* tty in use for dialout only */
#define TS_RTS_DOWN 0x00020000 /* modem pls stop */
#define TS_TRANSLATE 0x00100000 /* translation device enabled */
#define TS_KDB 0x00200000 /* should enter kdb on ALT */
#define TS_MIN_TO_RCV 0x00400000 /* character recived during
receive timeout interval */
/* flags - old names defined in terms of new ones */
#define TANDEM TF_TANDEM
#define ODDP TF_ODDP
#define EVENP TF_EVENP
#define ANYP (ODDP|EVENP)
#define MDMBUF TF_MDMBUF
#define LITOUT TF_LITOUT
#define NOHANG TF_NOHANG
#define ECHO TF_ECHO
#define CRMOD TF_CRMOD
#define XTABS TF_XTABS
/* these are here only to let old code compile - they are never set */
#define RAW LITOUT
#define PASS8 LITOUT
/*
* Hardware bits.
* SHOULD NOT BE HERE.
*/
#define DONE 0200
#define IENABLE 0100
/*
* Modem control commands.
*/
#define DMSET 0
#define DMBIS 1
#define DMBIC 2
#define DMGET 3
/*
* Fake 'line discipline' switch, for the benefit of old code
* that wants to call through it.
*/
struct ldisc_switch {
int (*l_read) (struct tty *, io_req_t); /* read */
int (*l_write)(struct tty *, io_req_t); /* write */
void (*l_rint) (unsigned int, struct tty *); /* character input */
boolean_t (*l_modem)(struct tty *, boolean_t); /* modem change */
void (*l_start)(struct tty *); /* start output */
};
extern struct ldisc_switch linesw[];
#endif /* _DEVICE_TTY_H_ */
|
