Annotation of sys/arch/sgi/dev/lpt_lbus.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: lpt_lbus.c,v 1.4 2005/01/31 21:35:50 grange Exp $ */
2:
3: /*
4: * Copyright (c) 1993, 1994 Charles Hannum.
5: * Copyright (c) 1990 William F. Jolitz, TeleMuse
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This software is a component of "386BSD" developed by
19: * William F. Jolitz, TeleMuse.
20: * 4. Neither the name of the developer nor the name "386BSD"
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
25: * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
26: * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
27: * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
28: * NOT MAKE USE OF THIS WORK.
29: *
30: * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
31: * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
32: * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
33: * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
34: * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
35: * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
36: * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
37: * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
38: *
39: * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
40: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42: * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
43: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
44: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
45: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
47: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
48: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49: * SUCH DAMAGE.
50: */
51:
52: /*
53: * Device Driver for AT parallel printer port
54: */
55:
56: #include <sys/param.h>
57: #include <sys/systm.h>
58: #include <sys/device.h>
59:
60: #include <machine/autoconf.h>
61: #include <machine/bus.h>
62: #include <machine/intr.h>
63:
64: #include <dev/ic/lptreg.h>
65: #include <dev/ic/lptvar.h>
66:
67: int lpt_localbus_probe(struct device *, void *, void *);
68: void lpt_localbus_attach(struct device *, struct device *, void *);
69:
70: struct cfattach lpt_pica_ca = {
71: sizeof(struct lpt_softc), lpt_localbus_probe, lpt_localbus_attach
72: };
73:
74: struct cfattach lpt_algor_ca = {
75: sizeof(struct lpt_softc), lpt_localbus_probe, lpt_localbus_attach
76: };
77:
78: int
79: lpt_localbus_probe(parent, match, aux)
80: struct device *parent;
81: void *match, *aux;
82: {
83: struct confargs *ca = aux;
84: bus_space_tag_t iot;
85: bus_space_handle_t ioh;
86: bus_addr_t base;
87: u_int8_t mask, data;
88: int i;
89:
90: #ifdef DEBUG
91: #define ABORT \
92: do { \
93: printf("lpt_localbus_probe: mask %x data %x failed\n", mask, \
94: data); \
95: return 0; \
96: } while (0)
97: #else
98: #define ABORT return 0
99: #endif
100:
101: if (!BUS_MATCHNAME(ca, "lpt"))
102: return(0);
103:
104: /*XXX need to check where to pick up iotag when porting this */
105: iot = sys_config.localbus_iot;
106: base = (bus_addr_t)BUS_CVTADDR(ca);
107: if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh)) {
108: return 0;
109: }
110:
111: mask = 0xff;
112:
113: data = 0x55; /* Alternating zeros */
114: if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
115: ABORT;
116:
117: data = 0xaa; /* Alternating ones */
118: if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
119: ABORT;
120:
121: for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
122: data = ~(1 << i);
123: if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
124: ABORT;
125: }
126:
127: for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
128: data = (1 << i);
129: if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
130: ABORT;
131: }
132:
133: bus_space_write_1(iot, ioh, lpt_data, 0);
134: bus_space_write_1(iot, ioh, lpt_control, 0);
135:
136: return 1;
137: }
138:
139: void
140: lpt_localbus_attach(parent, self, aux)
141: struct device *parent, *self;
142: void *aux;
143: {
144: struct lpt_softc *sc = (void *)self;
145: struct confargs *ca = aux;
146: bus_space_tag_t iot;
147: bus_space_handle_t ioh;
148: bus_addr_t base;
149:
150: printf("\n");
151:
152: sc->sc_state = 0;
153: iot = sc->sc_iot = &pmonmips_bus_io;
154: base = (bus_space_handle_t)BUS_CVTADDR(ca);
155: if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh)) {
156: panic("unexpected bus_space_map error");
157: }
158: sc->sc_ioh = ioh;
159:
160: bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT);
161:
162: BUS_INTR_ESTABLISH(ca, lptintr, sc);
163: }
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