335c1af878
even if PCI and the IDs are right), just for sanity, before declaring success. Split the single 0x3b0 -> 0x3df allocation into three seperate ones: 0x3b0 -> 0x3bc (leaving the 4 ports available for lpt), 0x3c0 -> 0x3cf, and 0x3d0 -> 0x3df. The former chunk has to be split off if the lpt can exist there, and it's sort-of pretty to have each group (based on second hex digit) have its own handle.
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/* $NetBSD: vga_isa.c,v 1.3 1996/11/23 06:06:44 cgd Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <machine/autoconf.h>
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#include <machine/pte.h>
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#include <dev/isa/isavar.h>
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#include <alpha/common/vgavar.h>
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#include <alpha/isa/vga_isavar.h>
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struct vga_isa_softc {
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struct device sc_dev;
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struct vga_config *sc_vc; /* VGA configuration */
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};
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int vga_isa_match __P((struct device *, void *, void *));
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void vga_isa_attach __P((struct device *, struct device *, void *));
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struct cfattach vga_isa_ca = {
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sizeof(struct vga_isa_softc), vga_isa_match, vga_isa_attach,
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};
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int vga_isa_console_tag; /* really just a boolean. */
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struct vga_config vga_isa_console_vc;
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int
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vga_isa_match(parent, match, aux)
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struct device *parent;
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void *match, *aux;
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{
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struct isa_attach_args *ia = aux;
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int rv;
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/* If values are hardwired to something that they can't be, punt. */
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if (ia->ia_iobase != IOBASEUNK || /* ia->ia_iosize != 0 || XXX isa.c */
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(ia->ia_maddr != MADDRUNK && ia->ia_maddr != 0xb8000) ||
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(ia->ia_msize != 0 && ia->ia_msize != 0x8000) ||
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ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
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return (0);
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if (vga_isa_console_tag)
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return (1);
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rv = vga_common_probe(ia->ia_iot, ia->ia_memt);
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if (rv) {
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ia->ia_iobase = 0x3b0;
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ia->ia_iosize = 0x30;
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ia->ia_maddr = 0xb8000;
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ia->ia_msize = 0x8000;
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}
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return (rv);
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}
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void
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vga_isa_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct isa_attach_args *ia = aux;
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struct vga_isa_softc *sc = (struct vga_isa_softc *)self;
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struct vga_config *vc;
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int console;
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console = vga_isa_console_tag;
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if (console)
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vc = sc->sc_vc = &vga_isa_console_vc;
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else {
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vc = sc->sc_vc = (struct vga_config *)
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malloc(sizeof(struct vga_config), M_DEVBUF, M_WAITOK);
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/* set up bus-independent VGA configuration */
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vga_common_setup(ia->ia_iot, ia->ia_memt, vc);
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}
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printf("\n");
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vga_wscons_attach(self, vc, console);
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}
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int
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vga_isa_console_match(iot, memt)
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bus_space_tag_t iot, memt;
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{
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return (vga_common_probe(iot, memt));
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}
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void
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vga_isa_console_attach(iot, memt)
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bus_space_tag_t iot, memt;
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{
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struct vga_config *vc = &vga_isa_console_vc;
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/* for later recognition */
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vga_isa_console_tag = 1;
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/* set up bus-independent VGA configuration */
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vga_common_setup(iot, memt, vc);
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vga_wscons_console(vc);
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}
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