Line data Source code
1 : /* $OpenBSD: lpt_isa.c,v 1.15 2015/03/14 03:38:47 jsg 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/bus.h>
61 :
62 : #include <dev/isa/isavar.h>
63 : #include <dev/ic/lptreg.h>
64 : #include <dev/ic/lptvar.h>
65 :
66 : int lpt_isa_probe(struct device *, void *, void *);
67 : void lpt_isa_attach(struct device *, struct device *, void *);
68 :
69 : struct cfattach lpt_isa_ca = {
70 : sizeof(struct lpt_softc), lpt_isa_probe, lpt_isa_attach, NULL,
71 : lpt_activate
72 : };
73 :
74 : /*
75 : * Logic:
76 : * 1) You should be able to write to and read back the same value
77 : * to the data port. Do an alternating zeros, alternating ones,
78 : * walking zero, and walking one test to check for stuck bits.
79 : *
80 : * 2) You should be able to write to and read back the same value
81 : * to the control port lower 5 bits, the upper 3 bits are reserved
82 : * per the IBM PC technical reference manuals and different boards
83 : * do different things with them. Do an alternating zeros, alternating
84 : * ones, walking zero, and walking one test to check for stuck bits.
85 : *
86 : * Some printers drag the strobe line down when the are powered off
87 : * so this bit has been masked out of the control port test.
88 : *
89 : * XXX Some printers may not like a fast pulse on init or strobe, I
90 : * don't know at this point, if that becomes a problem these bits
91 : * should be turned off in the mask byte for the control port test.
92 : *
93 : * 3) Set the data and control ports to a value of 0
94 : */
95 : int
96 0 : lpt_isa_probe(parent, match, aux)
97 : struct device *parent;
98 : void *match, *aux;
99 : {
100 : #if !defined(__NO_ISA_INTR_CHECK)
101 0 : struct isa_softc *sc = (struct isa_softc *)parent;
102 : #endif
103 0 : struct isa_attach_args *ia = aux;
104 : bus_space_tag_t iot;
105 0 : bus_space_handle_t ioh;
106 : bus_addr_t base;
107 : u_int8_t mask, data;
108 : int i, rv, iosz;
109 :
110 : #ifdef DEBUG
111 : #define ABORT \
112 : do { \
113 : printf("lpt_isa_probe: mask %x data %x failed\n", mask, \
114 : data); \
115 : goto out; \
116 : } while (0)
117 : #else
118 : #define ABORT goto out
119 : #endif
120 :
121 0 : iot = ia->ia_iot;
122 0 : base = ia->ia_iobase;
123 0 : iosz = (ia->ia_iosize == 0x666) ? LPT_NPORTS : ia->ia_iosize;
124 0 : if (bus_space_map(iot, base, iosz, 0, &ioh))
125 0 : return 0;
126 :
127 : rv = 0;
128 : mask = 0xff;
129 :
130 : data = 0x55; /* Alternating zeros */
131 0 : if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
132 : ABORT;
133 :
134 : data = 0xaa; /* Alternating ones */
135 0 : if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
136 : ABORT;
137 :
138 0 : for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
139 0 : data = ~(1 << i);
140 0 : if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
141 : ABORT;
142 : }
143 :
144 0 : for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
145 0 : data = (1 << i);
146 0 : if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
147 : ABORT;
148 : }
149 :
150 0 : bus_space_write_1(iot, ioh, lpt_data, 0);
151 0 : bus_space_write_1(iot, ioh, lpt_control, 0);
152 :
153 : /*
154 : * Check if the specified IRQ is available. If not revert to
155 : * polled mode.
156 : */
157 : #if !defined(__NO_ISA_INTR_CHECK)
158 0 : if (ia->ia_irq != IRQUNK &&
159 0 : !isa_intr_check(sc->sc_ic, ia->ia_irq, IST_EDGE))
160 0 : ia->ia_irq = IRQUNK;
161 : #endif
162 0 : ia->ia_msize = 0;
163 0 : ia->ia_iosize = iosz;
164 :
165 0 : rv = 1;
166 :
167 : out:
168 0 : bus_space_unmap(iot, ioh, iosz);
169 0 : return rv;
170 0 : }
171 :
172 : void
173 0 : lpt_isa_attach(parent, self, aux)
174 : struct device *parent, *self;
175 : void *aux;
176 : {
177 0 : struct lpt_softc *sc = (void *)self;
178 0 : struct isa_attach_args *ia = aux;
179 :
180 0 : sc->sc_state = 0;
181 0 : sc->sc_iot = ia->ia_iot;
182 0 : if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
183 0 : &sc->sc_ioh))
184 0 : panic("lpt_isa_attach: couldn't map I/O ports");
185 :
186 0 : if (ia->ia_irq == IRQUNK) {
187 0 : sc->sc_flags |= LPT_POLLED;
188 0 : printf(": polled");
189 0 : }
190 :
191 0 : lpt_attach_common(sc);
192 :
193 0 : if (ia->ia_irq != IRQUNK)
194 0 : sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
195 0 : IPL_TTY, lptintr, sc, sc->sc_dev.dv_xname);
196 0 : }
|
