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1.1 root 1: /*
2: * Mach Operating System
3: * Copyright (c) 1993-1990 Carnegie Mellon University
4: * All Rights Reserved.
5: *
6: * Permission to use, copy, modify and distribute this software and its
7: * documentation is hereby granted, provided that both the copyright
8: * notice and this permission notice appear in all copies of the
9: * software, derivative works or modified versions, and any portions
10: * thereof, and that both notices appear in supporting documentation.
11: *
12: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15: *
16: * Carnegie Mellon requests users of this software to return to
17: *
18: * Software Distribution Coordinator or [email protected]
19: * School of Computer Science
20: * Carnegie Mellon University
21: * Pittsburgh PA 15213-3890
22: *
23: * any improvements or extensions that they make and grant Carnegie Mellon
24: * the rights to redistribute these changes.
25: */
26: /*
27: * Author: David B. Golub, Carnegie Mellon University
28: * Date: 7/90
29: *
30: * Compatibility TTY structure for existing TTY device drivers.
31: */
32:
33: #ifndef _DEVICE_TTY_H_
34: #define _DEVICE_TTY_H_
35:
36: #include <kern/lock.h>
37: #include <kern/queue.h>
38: #include <mach/port.h>
39:
40: #include <device/device_types.h>
41: #include <device/tty_status.h>
42: #include <device/cirbuf.h>
43: #include <device/io_req.h>
44:
45: #ifdef luna88k
46: #include <luna88k/jtermio.h>
47: #endif
48:
49: struct tty {
50: decl_simple_lock_data(,t_lock)
51: struct cirbuf t_inq; /* input buffer */
52: struct cirbuf t_outq; /* output buffer */
53: char * t_addr; /* device pointer */
54: int t_dev; /* device number */
55: int (*t_start)(struct tty *);
56: /* routine to start output */
57: #define t_oproc t_start
58: int (*t_stop)(struct tty *, int);
59: /* routine to stop output */
60: int (*t_mctl)(struct tty *, int, int);
61: /* (optional) routine to control
62: modem signals */
63: char t_ispeed; /* input speed */
64: char t_ospeed; /* output speed */
65: char t_breakc; /* character to deliver when 'break'
66: condition received */
67: int t_flags; /* mode flags */
68: int t_state; /* current state */
69: int t_line; /* fake line discipline number,
70: for old drivers - always 0 */
71: queue_head_t t_delayed_read; /* pending read requests */
72: queue_head_t t_delayed_write;/* pending write requests */
73: queue_head_t t_delayed_open; /* pending open requests */
74:
75: /*
76: * Items beyond this point should be removed to device-specific
77: * extension structures.
78: */
79: int (*t_getstat)(); /* routine to get status */
80: int (*t_setstat)(); /* routine to set status */
81: dev_ops_t t_tops; /* another device to possibly
82: push through */
83: };
84: typedef struct tty *tty_t;
85:
86: /*
87: * Common TTY service routines
88: */
89: extern io_return_t char_open(
90: int dev,
91: struct tty * tp,
92: dev_mode_t mode,
93: io_req_t ior);
94:
95: extern io_return_t char_read(
96: struct tty * tp,
97: io_req_t ior);
98:
99: extern io_return_t char_write(
100: struct tty * tp,
101: io_req_t ior);
102:
103: extern void ttyinput(
104: unsigned int c,
105: struct tty * tp);
106:
107: extern boolean_t ttymodem(
108: struct tty * tp,
109: boolean_t carrier_up);
110:
111: extern void tty_queue_completion(
112: queue_t queue);
113: #define tt_open_wakeup(tp) \
114: (tty_queue_completion(&(tp)->t_delayed_open))
115: #define tt_write_wakeup(tp) \
116: (tty_queue_completion(&(tp)->t_delayed_write))
117:
118: extern void ttychars(
119: struct tty * tp);
120:
121: #define TTMINBUF 90
122:
123: short tthiwat[NSPEEDS], ttlowat[NSPEEDS];
124: #define TTHIWAT(tp) tthiwat[(tp)->t_ospeed]
125: #define TTLOWAT(tp) ttlowat[(tp)->t_ospeed]
126:
127: /* internal state bits */
128: #define TS_INIT 0x00000001 /* tty structure initialized */
129: #define TS_TIMEOUT 0x00000002 /* delay timeout in progress */
130: #define TS_WOPEN 0x00000004 /* waiting for open to complete */
131: #define TS_ISOPEN 0x00000008 /* device is open */
132: #define TS_FLUSH 0x00000010 /* outq has been flushed during DMA */
133: #define TS_CARR_ON 0x00000020 /* software copy of carrier-present */
134: #define TS_BUSY 0x00000040 /* output in progress */
135: #define TS_ASLEEP 0x00000080 /* wakeup when output done */
136:
137: #define TS_TTSTOP 0x00000100 /* output stopped by ctl-s */
138: #define TS_HUPCLS 0x00000200 /* hang up upon last close */
139: #define TS_TBLOCK 0x00000400 /* tandem queue blocked */
140:
141: #define TS_NBIO 0x00001000 /* tty in non-blocking mode */
142: #define TS_ONDELAY 0x00002000 /* device is open; software copy of
143: * carrier is not present */
144: #define TS_MIN 0x00004000 /* buffer input chars, if possible */
145: #define TS_MIN_TO 0x00008000 /* timeout for the above is active */
146:
147: #define TS_OUT 0x00010000 /* tty in use for dialout only */
148: #define TS_RTS_DOWN 0x00020000 /* modem pls stop */
149:
150: #define TS_TRANSLATE 0x00100000 /* translation device enabled */
151: #define TS_KDB 0x00200000 /* should enter kdb on ALT */
152:
153: #define TS_MIN_TO_RCV 0x00400000 /* character recived during
154: receive timeout interval */
155:
156: /* flags - old names defined in terms of new ones */
157:
158: #define TANDEM TF_TANDEM
159: #define ODDP TF_ODDP
160: #define EVENP TF_EVENP
161: #define ANYP (ODDP|EVENP)
162: #define MDMBUF TF_MDMBUF
163: #define LITOUT TF_LITOUT
164: #define NOHANG TF_NOHANG
165:
166: #define ECHO TF_ECHO
167: #define CRMOD TF_CRMOD
168: #define XTABS TF_XTABS
169:
170: /* these are here only to let old code compile - they are never set */
171: #define RAW LITOUT
172: #define PASS8 LITOUT
173:
174: /*
175: * Hardware bits.
176: * SHOULD NOT BE HERE.
177: */
178: #define DONE 0200
179: #define IENABLE 0100
180:
181: /*
182: * Modem control commands.
183: */
184: #define DMSET 0
185: #define DMBIS 1
186: #define DMBIC 2
187: #define DMGET 3
188:
189: /*
190: * Fake 'line discipline' switch, for the benefit of old code
191: * that wants to call through it.
192: */
193: struct ldisc_switch {
194: int (*l_read) (struct tty *, io_req_t); /* read */
195: int (*l_write)(struct tty *, io_req_t); /* write */
196: void (*l_rint) (unsigned int, struct tty *); /* character input */
197: boolean_t (*l_modem)(struct tty *, boolean_t); /* modem change */
198: void (*l_start)(struct tty *); /* start output */
199: };
200:
201: extern struct ldisc_switch linesw[];
202:
203: #endif /* _DEVICE_TTY_H_ */
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