Annotation of sys/arch/hppa/gsc/lpt_gsc.c, Revision 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