1 /* $OpenBSD: lpt_gsc.c,v 1.13 2022/03/13 08:04:38 mpi Exp $ */
2
3 /*
4 * Copyright (c) 1998 Michael Shalayeff
5 * Copyright (c) 1993, 1994 Charles Hannum.
6 * Copyright (c) 1990 William F. Jolitz, TeleMuse
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This software is a component of "386BSD" developed by
20 * William F. Jolitz, TeleMuse.
21 * 4. Neither the name of the developer nor the name "386BSD"
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
26 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
27 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
28 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
29 * NOT MAKE USE OF THIS WORK.
30 *
31 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
32 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
33 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
34 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
35 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
36 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
37 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
38 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 */
52
53 #include <sys/param.h>
54 #include <sys/systm.h>
55 #include <sys/device.h>
56
57 #include <machine/bus.h>
58 #include <machine/intr.h>
59 #include <machine/iomod.h>
60 #include <machine/autoconf.h>
61
62 #include <dev/ic/lptreg.h>
63 #include <dev/ic/lptvar.h>
64
65 #include <hppa/dev/cpudevs.h>
66
67 #include <hppa/gsc/gscbusvar.h>
68
69 #define LPTGSC_OFFSET 0x800
70
71 int lpt_gsc_probe(struct device *, void *, void *);
72 void lpt_gsc_attach(struct device *, struct device *, void *);
73
74 const struct cfattach lpt_gsc_ca = {
75 sizeof(struct lpt_softc), lpt_gsc_probe, lpt_gsc_attach
76 };
77
78 /*
79 * Logic:
80 * 1) You should be able to write to and read back the same value
81 * to the data port. Do an alternating zeros, alternating ones,
82 * walking zero, and walking one test to check for stuck bits.
83 *
84 * 2) You should be able to write to and read back the same value
85 * to the control port lower 5 bits, the upper 3 bits are reserved
86 * per the IBM PC technical reference manuals and different boards
87 * do different things with them. Do an alternating zeros, alternating
88 * ones, walking zero, and walking one test to check for stuck bits.
89 *
90 * Some printers drag the strobe line down when the are powered off
91 * so this bit has been masked out of the control port test.
92 *
93 * XXX Some printers may not like a fast pulse on init or strobe, I
94 * don't know at this point, if that becomes a problem these bits
95 * should be turned off in the mask byte for the control port test.
96 *
97 * 3) Set the data and control ports to a value of 0
98 */
99 int
lpt_gsc_probe(parent,match,aux)100 lpt_gsc_probe(parent, match, aux)
101 struct device *parent;
102 void *match, *aux;
103 {
104 struct gsc_attach_args *ga = aux;
105 bus_space_handle_t ioh;
106 bus_addr_t base;
107 u_int8_t mask, data;
108 int i, rv;
109
110 if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
111 ga->ga_type.iodc_sv_model != HPPA_FIO_CENT)
112 return 0;
113
114 #ifdef DEBUG
115 #define ABORT \
116 do { \
117 printf("lpt_gsc_probe: mask %x data %x failed\n", mask, \
118 data); \
119 return 0; \
120 } while (0)
121 #else
122 #define ABORT do { \
123 bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS); \
124 return 0; \
125 } while (0)
126 #endif
127
128 base = ga->ga_hpa + LPTGSC_OFFSET;
129 if (bus_space_map(ga->ga_iot, base, LPT_NPORTS, 0, &ioh)) {
130 printf("lpt_gsc_probe: cannot map io space\n");
131 return 0;
132 }
133
134 rv = 0;
135 mask = 0xff;
136
137 data = 0x55; /* Alternating zeros */
138 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
139 ABORT;
140
141 data = 0xaa; /* Alternating ones */
142 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
143 ABORT;
144
145 for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
146 data = ~(1 << i);
147 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
148 ABORT;
149 }
150
151 for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
152 data = (1 << i);
153 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
154 ABORT;
155 }
156
157 bus_space_write_1(ga->ga_iot, ioh, lpt_data, 0);
158 bus_space_write_1(ga->ga_iot, ioh, lpt_control, 0);
159 bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS);
160
161 return 1;
162 }
163
164 void
lpt_gsc_attach(parent,self,aux)165 lpt_gsc_attach(parent, self, aux)
166 struct device *parent, *self;
167 void *aux;
168 {
169 struct lpt_softc *sc = (void *)self;
170 struct gsc_attach_args *ga = aux;
171 bus_addr_t base;
172
173 /* sc->sc_flags |= LPT_POLLED; */
174
175 sc->sc_state = 0;
176 sc->sc_iot = ga->ga_iot;
177 base = ga->ga_hpa + LPTGSC_OFFSET;
178 if (bus_space_map(ga->ga_iot, base, LPT_NPORTS, 0, &sc->sc_ioh)) {
179 printf(": cannot map io space\n");
180 return;
181 }
182
183 lpt_attach_common(sc);
184
185 sc->sc_ih = gsc_intr_establish((struct gsc_softc *)parent,
186 ga->ga_irq, IPL_TTY, lptintr, sc, sc->sc_dev.dv_xname);
187 }
188