NetBSD-5.0.2/sys/arch/arc/jazz/lpt_jazzio.c
/* $NetBSD: lpt_jazzio.c,v 1.8 2008/03/07 17:15:51 cube Exp $ */
/* $OpenBSD: lpt_lbus.c,v 1.3 1997/04/10 16:29:17 pefo Exp $ */
/*
* Copyright (c) 1993, 1994 Charles M. Hannum.
* Copyright (c) 1990 William F. Jolitz, TeleMuse
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This software is a component of "386BSD" developed by
* William F. Jolitz, TeleMuse.
* 4. Neither the name of the developer nor the name "386BSD"
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
* NOT MAKE USE OF THIS WORK.
*
* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Device Driver for AT parallel printer port
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: lpt_jazzio.c,v 1.8 2008/03/07 17:15:51 cube Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/ic/lptreg.h>
#include <dev/ic/lptvar.h>
#include <arc/jazz/jazziovar.h>
int lpt_jazzio_probe(device_t, cfdata_t , void *);
void lpt_jazzio_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(lpt_jazzio, sizeof(struct lpt_softc),
lpt_jazzio_probe, lpt_jazzio_attach, NULL, NULL);
/*
* XXX - copied from lpt_isa.c
* sys/arch/arm32/mainbus/lpt_pioc.c also copies this.
* sys/arch/amiga/dev/lpt_supio.c doesn't.
*/
static int lpt_port_test(bus_space_tag_t, bus_space_handle_t, bus_addr_t,
bus_size_t, u_char, u_char);
/*
* Internal routine to lptprobe to do port tests of one byte value.
*/
static 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)
{
int timeout;
u_char temp;
data &= mask;
bus_space_write_1(iot, ioh, off, data);
timeout = 1000;
do {
delay(10);
temp = bus_space_read_1(iot, ioh, off) & mask;
} while (temp != data && --timeout);
return temp == data;
}
int
lpt_jazzio_probe(device_t parent, cfdata_t match, void *aux)
{
struct jazzio_attach_args *ja = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_addr_t base;
uint8_t mask, data;
int i, rv;
#ifdef DEBUG
#define ABORT \
do { \
printf("lpt_jazzio_probe: mask %x data %x failed\n", mask, \
data); \
goto out; \
} while (0)
#else
#define ABORT goto out
#endif
if (strcmp(ja->ja_name, "LPT1") != 0)
return (0);
iot = ja->ja_bust;
base = ja->ja_addr;
if (bus_space_map(iot, base, LPT_NPORTS, 0, &ioh))
return 0;
rv = 0;
mask = 0xff;
data = 0x55; /* Alternating zeros */
if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
ABORT;
data = 0xaa; /* Alternating ones */
if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
ABORT;
for (i = 0; i < CHAR_BIT; i++) { /* Walking zero */
data = ~(1 << i);
if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
ABORT;
}
for (i = 0; i < CHAR_BIT; i++) { /* Walking one */
data = (1 << i);
if (!lpt_port_test(iot, ioh, base, lpt_data, data, mask))
ABORT;
}
bus_space_write_1(iot, ioh, lpt_data, 0);
bus_space_write_1(iot, ioh, lpt_control, 0);
rv = 1;
out:
bus_space_unmap(iot, ioh, LPT_NPORTS);
return rv;
}
void
lpt_jazzio_attach(device_t parent, device_t self, void *aux)
{
struct lpt_softc *sc = device_private(self);
struct jazzio_attach_args *ja = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
aprint_normal("\n");
sc->sc_dev = self;
sc->sc_state = 0;
iot = sc->sc_iot = ja->ja_bust;
if (bus_space_map(iot, ja->ja_addr, LPT_NPORTS, 0, &ioh)) {
aprint_error_dev(self, "can't map i/o space\n");
return;
}
sc->sc_ioh = ioh;
bus_space_write_1(iot, ioh, lpt_control, LPC_NINIT);
jazzio_intr_establish(ja->ja_intr, lptintr, sc);
}