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
|
/* $OpenBSD: com_lbus.c,v 1.7 1998/03/16 09:38:41 pefo Exp $ */
/*
* Copyright (c) 1993, 1994 Charles Hannum.
* Copyright (c) 1990 William F. Jolitz, TeleMuse
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This software is a component of "386BSD" developed by
* William F. Jolitz, TeleMuse.
* 4. Neither the name of the developer nor the name "386BSD"
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
* NOT MAKE USE OF THIS WORK.
*
* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Device Driver for Serial ports
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/tty.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/isa/isavar.h> /* XXX for isa_chipset_tag_t in com_softc */
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
#include <dev/ic/ns16550reg.h>
/* Macros to clear/set/test flags. */
#define SET(t, f) (t) |= (f)
#define CLR(t, f) (t) &= ~(f)
#define ISSET(t, f) ((t) & (f))
int com_localbus_probe __P((struct device *, void *, void *));
void com_localbus_attach __P((struct device *, struct device *, void *));
struct cfattach com_pica_ca = {
sizeof(struct com_softc), com_localbus_probe, com_localbus_attach
};
struct cfattach com_algor_ca = {
sizeof(struct com_softc), com_localbus_probe, com_localbus_attach
};
int
com_localbus_probe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
bus_space_tag_t iot;
bus_space_handle_t ioh;
int iobase;
int rv = 1;
struct confargs *ca = aux;
if(!BUS_MATCHNAME(ca, "com"))
return(0);
ioh = iobase = (long)BUS_CVTADDR(ca);
iot = &arc_bus_io;
/* if it's in use as console, it's there. */
if (iobase == comconsaddr && !comconsattached) {
return(rv);
}
rv = comprobe1(iot, ioh);
return (rv);
}
void
com_localbus_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct com_softc *sc = (void *)self;
int iobase;
bus_space_tag_t iot;
bus_space_handle_t ioh;
struct confargs *ca = aux;
sc->sc_hwflags = 0;
sc->sc_swflags = 0;
sc->sc_iobase = iobase = (bus_addr_t)BUS_CVTADDR(ca);
sc->sc_ioh = ioh = (bus_space_handle_t)iobase;
sc->sc_iot = iot = &arc_bus_io;
if (iobase == comconsaddr) {
comconsattached = 1;
/*
* Need to reset baud rate, etc. of next print so reset
* comconsinit. Also make sure console is always "hardwired".
*/
delay(1000); /* wait for output to finish */
comconsinit = 0;
SET(sc->sc_hwflags, COM_HW_CONSOLE);
SET(sc->sc_swflags, COM_SW_SOFTCAR);
}
/* look for a NS 16550AF UART with FIFOs */
sc->sc_fifolen = 1;
bus_space_write_1(iot, ioh, com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_14);
delay(100);
if (ISSET(bus_space_read_1(iot, ioh, com_iir), IIR_FIFO_MASK) ==
IIR_FIFO_MASK) {
if (ISSET(bus_space_read_1(iot, ioh, com_fifo),
FIFO_TRIGGER_14) == FIFO_TRIGGER_14) {
SET(sc->sc_hwflags, COM_HW_FIFO);
printf(": ns16550a, working fifo\n");
sc->sc_fifolen = 16;
}
else {
printf(": ns16550, broken fifo\n");
}
}
else {
printf(": ns8250 or ns16450, no fifo\n");
}
bus_space_write_1(iot, ioh, com_fifo, 0);
/* disable interrupts */
bus_space_write_1(iot, ioh, com_ier, 0);
bus_space_write_1(iot, ioh, com_mcr, 0);
BUS_INTR_ESTABLISH(ca, comintr, (void *)(long)sc);
#ifdef KGDB
if (kgdb_dev == makedev(commajor, unit)) {
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
kgdb_dev = -1; /* can't debug over console port */
else {
cominit(iot, ioh, kgdb_rate);
if (kgdb_debug_init) {
/*
* Print prefix of device name,
* let kgdb_connect print the rest.
*/
printf("%s: ", sc->sc_dev.dv_xname);
kgdb_connect(1);
} else
printf("%s: kgdb enabled\n",
sc->sc_dev.dv_xname);
}
}
#endif
/* XXX maybe move up some? */
if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
printf("%s: console\n", sc->sc_dev.dv_xname);
}
|
