diff options
Diffstat (limited to 'sys/dev/isa/vga_isa.c')
| -rw-r--r-- | sys/dev/isa/vga_isa.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sys/dev/isa/vga_isa.c b/sys/dev/isa/vga_isa.c new file mode 100644 index 00000000000..615f16590a5 --- /dev/null +++ b/sys/dev/isa/vga_isa.c @@ -0,0 +1,145 @@ +/* $NetBSD: vga_isa.c,v 1.4 1996/12/05 01:39:32 cgd Exp $ */ + +/* + * Copyright (c) 1995, 1996 Carnegie-Mellon University. + * All rights reserved. + * + * Author: Chris G. Demetriou + * + * Permission to use, copy, modify and distribute this software and + * its documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/device.h> +#include <sys/malloc.h> + +#include <machine/autoconf.h> +#include <machine/pte.h> + +#include <dev/isa/isavar.h> + +#include <alpha/common/vgavar.h> +#include <alpha/isa/vga_isavar.h> + +struct vga_isa_softc { + struct device sc_dev; + + struct vga_config *sc_vc; /* VGA configuration */ +}; + +#ifdef __BROKEN_INDIRECT_CONFIG +int vga_isa_match __P((struct device *, void *, void *)); +#else +int vga_isa_match __P((struct device *, struct cfdata *, void *)); +#endif +void vga_isa_attach __P((struct device *, struct device *, void *)); + +struct cfattach vga_isa_ca = { + sizeof(struct vga_isa_softc), vga_isa_match, vga_isa_attach, +}; + +int vga_isa_console_tag; /* really just a boolean. */ +struct vga_config vga_isa_console_vc; + +int +vga_isa_match(parent, match, aux) + struct device *parent; +#ifdef __BROKEN_INDIRECT_CONFIG + void *match; +#else + struct cfdata *match; +#endif + void *aux; +{ + struct isa_attach_args *ia = aux; + int rv; + + /* If values are hardwired to something that they can't be, punt. */ + if (ia->ia_iobase != IOBASEUNK || /* ia->ia_iosize != 0 || XXX isa.c */ + (ia->ia_maddr != MADDRUNK && ia->ia_maddr != 0xb8000) || + (ia->ia_msize != 0 && ia->ia_msize != 0x8000) || + ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK) + return (0); + + if (vga_isa_console_tag) + return (1); + + rv = vga_common_probe(ia->ia_iot, ia->ia_memt); + + if (rv) { + ia->ia_iobase = 0x3b0; + ia->ia_iosize = 0x30; + ia->ia_maddr = 0xb8000; + ia->ia_msize = 0x8000; + } + return (rv); +} + +void +vga_isa_attach(parent, self, aux) + struct device *parent, *self; + void *aux; +{ + struct isa_attach_args *ia = aux; + struct vga_isa_softc *sc = (struct vga_isa_softc *)self; + struct vga_config *vc; + int console; + + console = vga_isa_console_tag; + if (console) + vc = sc->sc_vc = &vga_isa_console_vc; + else { + vc = sc->sc_vc = (struct vga_config *) + malloc(sizeof(struct vga_config), M_DEVBUF, M_WAITOK); + + /* set up bus-independent VGA configuration */ + vga_common_setup(ia->ia_iot, ia->ia_memt, vc); + } + + printf("\n"); + + vga_wscons_attach(self, vc, console); +} + +int +vga_isa_console_match(iot, memt) + bus_space_tag_t iot, memt; +{ + + return (vga_common_probe(iot, memt)); +} + +void +vga_isa_console_attach(iot, memt) + bus_space_tag_t iot, memt; +{ + struct vga_config *vc = &vga_isa_console_vc; + + /* for later recognition */ + vga_isa_console_tag = 1; + + /* set up bus-independent VGA configuration */ + vga_common_setup(iot, memt, vc); + + vga_wscons_console(vc); +} |