8ecf8999bf
except the ppbus stuff (which doesn't compile) and ulpt(4) which is unrelated and can be dealt with separately. As usual, it comes with related cosmetic changes.
268 lines
7.8 KiB
C
268 lines
7.8 KiB
C
/* $NetBSD: lpt_isa.c,v 1.66 2008/03/07 17:15:51 cube Exp $ */
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/*
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* Copyright (c) 1993, 1994 Charles M. Hannum.
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* Copyright (c) 1990 William F. Jolitz, TeleMuse
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This software is a component of "386BSD" developed by
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* William F. Jolitz, TeleMuse.
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* 4. Neither the name of the developer nor the name "386BSD"
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
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* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
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* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
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* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
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* NOT MAKE USE OF THIS WORK.
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*
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* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
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* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
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* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
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* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
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* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
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* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
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* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
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* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Device Driver for AT parallel printer port
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: lpt_isa.c,v 1.66 2008/03/07 17:15:51 cube Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/buf.h>
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#include <sys/kernel.h>
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#include <sys/ioctl.h>
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#include <sys/uio.h>
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#include <sys/device.h>
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#include <sys/syslog.h>
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#include <sys/bus.h>
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#include <sys/intr.h>
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#include <dev/isa/isavar.h>
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#include <dev/ic/lptreg.h>
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#include <dev/ic/lptvar.h>
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#define LPTPRI (PZERO+8)
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#define LPT_BSIZE 1024
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#ifndef LPTDEBUG
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#define LPRINTF(a)
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#else
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#define LPRINTF(a) if (lpt_isa_debug) printf a
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int lpt_isa_debug = 0;
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#endif
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struct lpt_isa_softc {
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struct lpt_softc sc_lpt;
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int sc_irq;
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isa_chipset_tag_t sc_ic;
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};
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int lpt_isa_probe(device_t, cfdata_t, void *);
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static void lpt_isa_attach(device_t, device_t, void *);
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static int lpt_isa_detach(device_t, int);
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CFATTACH_DECL_NEW(lpt_isa, sizeof(struct lpt_isa_softc),
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lpt_isa_probe, lpt_isa_attach, lpt_isa_detach, NULL);
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int lpt_port_test(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
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bus_size_t, u_char, u_char);
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/*
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* Internal routine to lptprobe to do port tests of one byte value.
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*/
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int
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lpt_port_test(bus_space_tag_t iot, bus_space_handle_t ioh,
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bus_addr_t base, bus_size_t off, u_char data, u_char mask)
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{
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int timeout;
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u_char temp;
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data &= mask;
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bus_space_write_1(iot, ioh, off, data);
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timeout = 1000;
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do {
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delay(10);
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temp = bus_space_read_1(iot, ioh, off) & mask;
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} while (temp != data && --timeout);
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LPRINTF(("lpt: port=0x%x out=0x%x in=0x%x timeout=%d\n",
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(unsigned)(base + off), (unsigned)data, (unsigned)temp, timeout));
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return (temp == data);
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}
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/*
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* Logic:
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* 1) You should be able to write to and read back the same value
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* to the data port. Do an alternating zeros, alternating ones,
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* walking zero, and walking one test to check for stuck bits.
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*
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* 2) You should be able to write to and read back the same value
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* to the control port lower 5 bits, the upper 3 bits are reserved
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* per the IBM PC technical reference manauls and different boards
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* do different things with them. Do an alternating zeros, alternating
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* ones, walking zero, and walking one test to check for stuck bits.
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*
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* Some printers drag the strobe line down when the are powered off
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* so this bit has been masked out of the control port test.
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*
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* XXX Some printers may not like a fast pulse on init or strobe, I
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* don't know at this point, if that becomes a problem these bits
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* should be turned off in the mask byte for the control port test.
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*
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* 3) Set the data and control ports to a value of 0
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*/
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int
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lpt_isa_probe(device_t parent, cfdata_t match, void *aux)
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{
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struct isa_attach_args *ia = aux;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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u_long base;
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u_char mask, data;
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int i, rv;
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#ifdef LPT_DEBUG
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#define ABORT do {printf("lptprobe: mask %x data %x failed\n", mask, data); \
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goto out;} while (0)
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#else
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#define ABORT goto out
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#endif
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if (ia->ia_nio < 1)
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return (0);
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if (ISA_DIRECT_CONFIG(ia))
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return (0);
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/* Disallow wildcarded i/o address. */
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if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
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return (0);
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iot = ia->ia_iot;
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base = ia->ia_io[0].ir_addr;
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if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh))
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return 0;
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rv = 0;
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mask = 0xff;
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data = 0x55; /* Alternating zeros */
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if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
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ABORT;
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data = 0xaa; /* Alternating ones */
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if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
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ABORT;
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for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
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data = ~(1 << i);
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if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
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ABORT;
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}
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for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
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data = (1 << i);
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if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
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ABORT;
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}
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bus_space_write_1(iot, ioh, lpt_data, 0);
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bus_space_write_1(iot, ioh, lpt_control, 0);
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ia->ia_io[0].ir_size = LPT_NPORTS;
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ia->ia_niomem = 0;
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ia->ia_ndrq = 0;
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rv = 1;
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out:
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bus_space_unmap(iot, ioh, LPT_NPORTS);
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return rv;
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}
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void
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lpt_isa_attach(device_t parent, device_t self, void *aux)
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{
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struct lpt_isa_softc *sc = device_private(self);
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struct lpt_softc *lsc = &sc->sc_lpt;
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struct isa_attach_args *ia = aux;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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lsc->sc_dev = self;
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if (ia->ia_nirq < 1 ||
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ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) {
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sc->sc_irq = -1;
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aprint_normal(": polled\n");
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} else {
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sc->sc_irq = ia->ia_irq[0].ir_irq;
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aprint_normal("\n");
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}
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iot = lsc->sc_iot = ia->ia_iot;
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if (bus_space_map(iot, ia->ia_io[0].ir_addr, LPT_NPORTS, 0, &ioh)) {
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aprint_normal_dev(self, "can't map i/o space\n");
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return;
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}
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lsc->sc_ioh = ioh;
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lpt_attach_subr(lsc);
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sc->sc_ic = ia->ia_ic;
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if (sc->sc_irq != -1)
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lsc->sc_ih = isa_intr_establish(sc->sc_ic, sc->sc_irq,
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IST_EDGE, IPL_TTY, lptintr, lsc);
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}
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static int
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lpt_isa_detach(device_t self, int flags)
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{
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int rc;
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struct lpt_isa_softc *sc = device_private(self);
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struct lpt_softc *lsc = &sc->sc_lpt;
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if ((rc = lpt_detach_subr(self, flags)) != 0)
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return rc;
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if (sc->sc_irq != -1)
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isa_intr_disestablish(sc->sc_ic, lsc->sc_ih);
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bus_space_unmap(lsc->sc_iot, lsc->sc_ioh, LPT_NPORTS);
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return 0;
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}
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