166 lines
4.6 KiB
C
166 lines
4.6 KiB
C
/* $NetBSD: com_gsc.c,v 1.17 2011/07/01 18:33:09 dyoung Exp $ */
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/* $OpenBSD: com_gsc.c,v 1.8 2000/03/13 14:39:59 mickey Exp $ */
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/*
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* Copyright (c) 1998-2004 Michael Shalayeff
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: com_gsc.c,v 1.17 2011/07/01 18:33:09 dyoung Exp $");
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#include "opt_kgdb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/tty.h>
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#ifdef KGDB
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#include <sys/kgdb.h>
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#endif
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#include <sys/bus.h>
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#include <machine/intr.h>
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#include <machine/iomod.h>
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#include <machine/autoconf.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <hp700/dev/cpudevs.h>
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#include <hp700/gsc/gscbusvar.h>
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#include <hp700/hp700/machdep.h>
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#define COMGSC_OFFSET 0x800
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#define COMGSC_FREQUENCY (1843200 * 4) /* 16-bit baud rate divisor */
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struct com_gsc_regs {
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uint8_t reset;
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};
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struct com_gsc_softc {
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struct com_softc sc_com; /* real "com" softc */
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/* GSC-specific goo. */
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void *sc_ih; /* interrupt handler */
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};
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int com_gsc_probe(device_t, cfdata_t , void *);
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void com_gsc_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(com_gsc, sizeof(struct com_gsc_softc),
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com_gsc_probe, com_gsc_attach, NULL, NULL);
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int
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com_gsc_probe(device_t parent, cfdata_t match, void *aux)
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{
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struct gsc_attach_args *ga = aux;
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if (ga->ga_type.iodc_type != HPPA_TYPE_FIO ||
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(ga->ga_type.iodc_sv_model != HPPA_FIO_GRS232 &&
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ga->ga_type.iodc_sv_model != HPPA_FIO_RS232))
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return 0;
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return 1;
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}
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void
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com_gsc_attach(device_t parent, device_t self, void *aux)
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{
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struct com_gsc_softc *gsc = device_private(self);
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struct com_softc *sc = &gsc->sc_com;
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struct gsc_attach_args *ga = aux;
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int pagezero_cookie;
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bus_space_tag_t iot;
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bus_space_handle_t ioh;
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bus_addr_t iobase;
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sc->sc_dev = self;
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sc->sc_hwflags = 0;
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sc->sc_swflags = 0;
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iot = ga->ga_iot;
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iobase = (bus_addr_t)ga->ga_hpa + COMGSC_OFFSET;
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sc->sc_frequency = COMGSC_FREQUENCY;
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/* Test if this is the console. Compare either HPA or device path. */
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pagezero_cookie = hp700_pagezero_map();
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if ((hppa_hpa_t)PAGE0->mem_cons.pz_hpa == ga->ga_hpa ) {
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/*
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* This port is the console. In this case we must call
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* comcnattach() and later com_is_console() to initialize
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* everything properly.
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*/
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if (comcnattach(iot, iobase, B9600,
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sc->sc_frequency, COM_TYPE_NORMAL,
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(TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) {
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aprint_error(": can't comcnattach\n");
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hp700_pagezero_unmap(pagezero_cookie);
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return;
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}
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}
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hp700_pagezero_unmap(pagezero_cookie);
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/*
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* Get the already initialized console ioh via com_is_console() if
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* this is the console or map the I/O space if this isn't the console.
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*/
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if (!com_is_console(iot, iobase, &ioh) &&
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bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh) != 0) {
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aprint_error(": can't map I/O space\n");
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return;
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}
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COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase);
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com_attach_subr(sc);
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gsc->sc_ih = hp700_intr_establish(IPL_TTY, comintr, sc, ga->ga_ir,
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ga->ga_irq);
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}
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#ifdef KGDB
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int com_gsc_kgdb_attach(void);
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int
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com_gsc_kgdb_attach(void)
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{
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int error;
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printf("kgdb: attaching com at 0x%x at %d baud...",
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KGDBADDR, KGDBRATE);
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error = com_kgdb_attach(&hppa_bustag, KGDBADDR + COMGSC_OFFSET,
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KGDBRATE, COMGSC_FREQUENCY, COM_TYPE_NORMAL,
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((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) |
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CS8));
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if (error) {
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printf(" failed (%d)\n", error);
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} else {
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printf(" ok\n");
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}
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return (error);
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}
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#endif /* KGDB */
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