Annotation of sys/arch/hppa/gsc/lpt_gsc.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: lpt_gsc.c,v 1.11 2004/09/14 22:32:01 mickey 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: 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 manauls 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
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
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: }
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to lpt_gsc.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / arch / hppa / gsc