1 /* $NetBSD: lpt_gsc.c,v 1.2 2019/12/27 09:28:41 msaitoh Exp $ */
2
3 /* $OpenBSD: lpt_gsc.c,v 1.6 2000/07/21 17:41:06 mickey Exp $ */
4
5 /*
6 * Copyright (c) 1998 Michael Shalayeff
7 * Copyright (c) 1993, 1994 Charles Hannum.
8 * Copyright (c) 1990 William F. Jolitz, TeleMuse
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This software is a component of "386BSD" developed by
22 * William F. Jolitz, TeleMuse.
23 * 4. Neither the name of the developer nor the name "386BSD"
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
28 * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
29 * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
30 * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
31 * NOT MAKE USE OF THIS WORK.
32 *
33 * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
34 * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
35 * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
36 * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
37 * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
38 * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
39 * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
40 * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
41 *
42 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45 * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 */
54
55 #include <sys/cdefs.h>
56 __KERNEL_RCSID(0, "$NetBSD: lpt_gsc.c,v 1.2 2019/12/27 09:28:41 msaitoh Exp $");
57
58 #include <sys/param.h>
59 #include <sys/systm.h>
60 #include <sys/device.h>
61
62 #include <sys/bus.h>
63 #include <machine/intr.h>
64 #include <machine/iomod.h>
65 #include <machine/autoconf.h>
66
67 #include <dev/ic/lptreg.h>
68 #include <dev/ic/lptvar.h>
69
70 #include <hppa/dev/cpudevs.h>
71
72 #include <hppa/gsc/gscbusvar.h>
73
74 #define LPTGSC_OFFSET 0x800
75
76 #ifndef LPTDEBUG
77 #define LPRINTF(a)
78 #else
79 #define LPRINTF(a) if (lpt_isa_debug) printf a
80 int lpt_isa_debug = 0;
81 #endif
82
83 int lpt_gsc_probe(device_t, cfdata_t , void *);
84 void lpt_gsc_attach(device_t, device_t, void *);
85
86 CFATTACH_DECL_NEW(lpt_gsc, sizeof(struct lpt_softc),
87 lpt_gsc_probe, lpt_gsc_attach, NULL, NULL);
88
89 int lpt_port_test(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
90 bus_size_t, u_char, u_char);
91
92 /*
93 * Internal routine to lptprobe to do port tests of one byte value.
94 */
95 int
lpt_port_test(bus_space_tag_t iot,bus_space_handle_t ioh,bus_addr_t base,bus_size_t off,u_char data,u_char mask)96 lpt_port_test(bus_space_tag_t iot, bus_space_handle_t ioh, bus_addr_t base,
97 bus_size_t off, u_char data, u_char mask)
98 {
99 int timeout;
100 u_char temp;
101
102 data &= mask;
103 bus_space_write_1(iot, ioh, off, data);
104 timeout = 1000;
105 do {
106 delay(10);
107 temp = bus_space_read_1(iot, ioh, off) & mask;
108 } while (temp != data && --timeout);
109 LPRINTF(("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n",
110 (unsigned)(base + off), (unsigned)data, (unsigned)temp, timeout));
111 return (temp == data);
112 }
113
114 /*
115 * Logic:
116 * 1) You should be able to write to and read back the same value
117 * to the data port. Do an alternating zeros, alternating ones,
118 * walking zero, and walking one test to check for stuck bits.
119 *
120 * 2) You should be able to write to and read back the same value
121 * to the control port lower 5 bits, the upper 3 bits are reserved
122 * per the IBM PC technical reference manuals and different boards
123 * do different things with them. Do an alternating zeros, alternating
124 * ones, walking zero, and walking one test to check for stuck bits.
125 *
126 * Some printers drag the strobe line down when the are powered off
127 * so this bit has been masked out of the control port test.
128 *
129 * XXX Some printers may not like a fast pulse on init or strobe, I
130 * don't know at this point, if that becomes a problem these bits
131 * should be turned off in the mask byte for the control port test.
132 *
133 * 3) Set the data and control ports to a value of 0
134 */
135 int
lpt_gsc_probe(device_t parent,cfdata_t match,void * aux)136 lpt_gsc_probe(device_t parent, cfdata_t match, void *aux)
137 {
138 struct gsc_attach_args *ga = aux;
139 bus_space_handle_t ioh;
140 bus_addr_t base;
141 uint8_t mask, data;
142 int i;
143
144 if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
145 ga->ga_type.iodc_sv_model != HPPA_FIO_CENT)
146 return 0;
147
148 #ifdef DEBUG
149 #define ABORT \
150 do { \
151 printf("lpt_gsc_probe: mask %x data %x failed\n", mask, \
152 data); \
153 bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS); \
154 return 0; \
155 } while (0)
156 #else
157 #define ABORT \
158 do { \
159 bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS); \
160 return 0; \
161 } while (0)
162 #endif
163
164 base = ga->ga_hpa + LPTGSC_OFFSET;
165 if (bus_space_map(ga->ga_iot, base, LPT_NPORTS, 0, &ioh))
166 return 0;
167
168 mask = 0xff;
169
170 data = 0x55; /* Alternating zeros */
171 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
172 ABORT;
173
174 data = 0xaa; /* Alternating ones */
175 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
176 ABORT;
177
178 for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
179 data = ~(1 << i);
180 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
181 ABORT;
182 }
183
184 for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
185 data = (1 << i);
186 if (!lpt_port_test(ga->ga_iot, ioh, base, lpt_data, data, mask))
187 ABORT;
188 }
189
190 bus_space_write_1(ga->ga_iot, ioh, lpt_data, 0);
191 bus_space_write_1(ga->ga_iot, ioh, lpt_control, 0);
192 bus_space_unmap(ga->ga_iot, ioh, LPT_NPORTS);
193
194 return 1;
195 }
196
197 void
lpt_gsc_attach(device_t parent,device_t self,void * aux)198 lpt_gsc_attach(device_t parent, device_t self, void *aux)
199 {
200 struct lpt_softc *sc = device_private(self);
201 struct gsc_attach_args *ga = aux;
202
203 /* sc->sc_flags |= LPT_POLLED; */
204
205 sc->sc_dev = self;
206 sc->sc_state = 0;
207 sc->sc_iot = ga->ga_iot;
208 if (bus_space_map(sc->sc_iot, ga->ga_hpa + LPTGSC_OFFSET,
209 LPT_NPORTS, 0, &sc->sc_ioh)) {
210 aprint_error(": can't map i/o ports\n");
211 return;
212 }
213
214 lpt_attach_subr(sc);
215
216 sc->sc_ih = hppa_intr_establish(IPL_TTY, lptintr, sc, ga->ga_ir,
217 ga->ga_irq);
218 aprint_normal("\n");
219 }
220