1 /** $MirOS: src/sys/dev/isa/lpt_isa.c,v 1.2 2005/03/06 21:27:42 tg Exp $ */
2 /* $OpenBSD: lpt_isa.c,v 1.12 2002/03/14 01:26:56 millert Exp $ */
3
4 /*
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 /*
54 * Device Driver for AT parallel printer port
55 */
56
57 #include <sys/param.h>
58 #include <sys/systm.h>
59 #include <sys/device.h>
60
61 #include <machine/bus.h>
62 #include <machine/intr.h>
63
64 #if defined(INET) && defined(PLIP)
65 #include <sys/socket.h>
66 #include <net/if.h>
67 #ifdef __NetBSD__
68 #include <net/if_ether.h>
69 #else
70 #include <netinet/in.h>
71 #include <netinet/if_ether.h>
72 #endif
73 #endif
74
75 #include <dev/isa/isavar.h>
76 #include <dev/ic/lptreg.h>
77 #include <dev/ic/lptvar.h>
78
79 int lpt_isa_probe(struct device *, void *, void *);
80 void lpt_isa_attach(struct device *, struct device *, void *);
81
82 struct cfattach lpt_isa_ca = {
83 sizeof(struct lpt_softc), lpt_isa_probe, lpt_isa_attach
84 };
85
86 /*
87 * Logic:
88 * 1) You should be able to write to and read back the same value
89 * to the data port. Do an alternating zeros, alternating ones,
90 * walking zero, and walking one test to check for stuck bits.
91 *
92 * 2) You should be able to write to and read back the same value
93 * to the control port lower 5 bits, the upper 3 bits are reserved
94 * per the IBM PC technical reference manauls and different boards
95 * do different things with them. Do an alternating zeros, alternating
96 * ones, walking zero, and walking one test to check for stuck bits.
97 *
98 * Some printers drag the strobe line down when the are powered off
99 * so this bit has been masked out of the control port test.
100 *
101 * XXX Some printers may not like a fast pulse on init or strobe, I
102 * don't know at this point, if that becomes a problem these bits
103 * should be turned off in the mask byte for the control port test.
104 *
105 * 3) Set the data and control ports to a value of 0
106 */
107 int
lpt_isa_probe(parent,match,aux)108 lpt_isa_probe(parent, match, aux)
109 struct device *parent;
110 void *match, *aux;
111 {
112 #if !defined(__NO_ISA_INTR_CHECK)
113 struct isa_softc *sc = (struct isa_softc *)parent;
114 #endif
115 struct isa_attach_args *ia = aux;
116 bus_space_tag_t iot;
117 bus_space_handle_t ioh;
118 bus_addr_t base;
119 u_int8_t mask, data;
120 int i, rv, iosz;
121
122 #ifdef DEBUG
123 #define ABORT \
124 do { \
125 printf("lpt_isa_probe: mask %x data %x failed\n", mask, \
126 data); \
127 goto out; \
128 } while (0)
129 #else
130 #define ABORT goto out
131 #endif
132
133 iot = ia->ia_iot;
134 base = ia->ia_iobase;
135 iosz = (ia->ia_iosize == 0x666) ? LPT_NPORTS : ia->ia_iosize;
136 if (bus_space_map(iot, base, iosz, 0, &ioh))
137 return 0;
138
139 rv = 0;
140 mask = 0xff;
141
142 data = 0x55; /* Alternating zeros */
143 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
144 ABORT;
145
146 data = 0xaa; /* Alternating ones */
147 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
148 ABORT;
149
150 for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
151 data = ~(1 << i);
152 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
153 ABORT;
154 }
155
156 for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
157 data = (1 << i);
158 if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
159 ABORT;
160 }
161
162 bus_space_write_1(iot, ioh, lpt_data, 0);
163 bus_space_write_1(iot, ioh, lpt_control, 0);
164
165 /*
166 * Check if the specified IRQ is available. If not revert to
167 * polled mode.
168 */
169 #if !defined(__NO_ISA_INTR_CHECK)
170 if (ia->ia_irq != IRQUNK &&
171 !isa_intr_check(sc->sc_ic, ia->ia_irq, IST_EDGE))
172 ia->ia_irq = IRQUNK;
173 #endif
174 ia->ia_msize = 0;
175 ia->ia_iosize = iosz;
176
177 rv = 1;
178
179 out:
180 bus_space_unmap(iot, ioh, iosz);
181 return rv;
182 }
183
184 void
lpt_isa_attach(parent,self,aux)185 lpt_isa_attach(parent, self, aux)
186 struct device *parent, *self;
187 void *aux;
188 {
189 struct lpt_softc *sc = (void *)self;
190 struct isa_attach_args *ia = aux;
191
192 sc->sc_state = 0;
193 sc->sc_iot = ia->ia_iot;
194 if (bus_space_map(sc->sc_iot, ia->ia_iobase, ia->ia_iosize, 0,
195 &sc->sc_ioh))
196 panic("lpt_isa_attach: couldn't map I/O ports");
197
198 if (ia->ia_irq == IRQUNK) {
199 sc->sc_flags |= LPT_POLLED;
200 printf(": polled");
201 }
202
203 lpt_attach_common(sc);
204
205 if (ia->ia_irq != IRQUNK)
206 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
207 #ifdef PLIP
208 IPL_NONE,
209 #else
210 IPL_TTY,
211 #endif
212 lptintr, sc, sc->sc_dev.dv_xname);
213 }
214