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Annotation of sys/dev/isa/vga_isa.c, Revision 1.1

1.1     ! nbrk        1: /* $OpenBSD: vga_isa.c,v 1.8 2002/03/14 01:26:56 millert Exp $ */
        !             2: /* $NetBSD: vga_isa.c,v 1.3 1998/06/12 18:45:48 drochner Exp $ */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Author: Chris G. Demetriou
        !             9:  *
        !            10:  * Permission to use, copy, modify and distribute this software and
        !            11:  * its documentation is hereby granted, provided that both the copyright
        !            12:  * notice and this permission notice appear in all copies of the
        !            13:  * software, derivative works or modified versions, and any portions
        !            14:  * thereof, and that both notices appear in supporting documentation.
        !            15:  *
        !            16:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            17:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
        !            18:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            19:  *
        !            20:  * Carnegie Mellon requests users of this software to return to
        !            21:  *
        !            22:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
        !            23:  *  School of Computer Science
        !            24:  *  Carnegie Mellon University
        !            25:  *  Pittsburgh PA 15213-3890
        !            26:  *
        !            27:  * any improvements or extensions that they make and grant Carnegie the
        !            28:  * rights to redistribute these changes.
        !            29:  */
        !            30:
        !            31: #include <sys/param.h>
        !            32: #include <sys/systm.h>
        !            33: #include <sys/kernel.h>
        !            34: #include <sys/device.h>
        !            35: #include <sys/malloc.h>
        !            36:
        !            37: #include <dev/isa/isavar.h>
        !            38:
        !            39: #include <dev/ic/mc6845reg.h>
        !            40: #include <dev/ic/pcdisplayvar.h>
        !            41: #include <dev/ic/vgareg.h>
        !            42: #include <dev/ic/vgavar.h>
        !            43: #include <dev/isa/vga_isavar.h>
        !            44:
        !            45: #include <dev/wscons/wsconsio.h>
        !            46: #include <dev/wscons/wsdisplayvar.h>
        !            47:
        !            48: struct vga_isa_softc {
        !            49:        struct device sc_dev;
        !            50: #if 0
        !            51:        struct vga_config *sc_vc;       /* VGA configuration */
        !            52: #endif
        !            53: };
        !            54:
        !            55: int    vga_isa_match(struct device *, void *, void *);
        !            56: void   vga_isa_attach(struct device *, struct device *, void *);
        !            57:
        !            58: struct cfattach vga_isa_ca = {
        !            59:        sizeof(struct vga_isa_softc), vga_isa_match, vga_isa_attach,
        !            60: };
        !            61:
        !            62: int
        !            63: vga_isa_match(parent, match, aux)
        !            64:        struct device *parent;
        !            65:        void *match;
        !            66:        void *aux;
        !            67: {
        !            68:        struct isa_attach_args *ia = aux;
        !            69:
        !            70:        /* If values are hardwired to something that they can't be, punt. */
        !            71:        if ((ia->ia_iobase != IOBASEUNK && ia->ia_iobase != 0x3b0) ||
        !            72:            /* ia->ia_iosize != 0 || XXX isa.c */
        !            73:            (ia->ia_maddr != MADDRUNK && ia->ia_maddr != 0xa0000) ||
        !            74:            (ia->ia_msize != 0 && ia->ia_msize != 0x20000) ||
        !            75:            ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
        !            76:                return (0);
        !            77:
        !            78:        if (!vga_is_console(ia->ia_iot, WSDISPLAY_TYPE_ISAVGA) &&
        !            79:            !vga_common_probe(ia->ia_iot, ia->ia_memt))
        !            80:                return (0);
        !            81:
        !            82:        ia->ia_iobase = 0x3b0;  /* XXX mono 0x3b0 color 0x3c0 */
        !            83:        ia->ia_iosize = 0x30;   /* XXX 0x20 */
        !            84:        ia->ia_maddr = 0xa0000;
        !            85:        ia->ia_msize = 0x20000;
        !            86:        return (2);     /* more than generic pcdisplay */
        !            87: }
        !            88:
        !            89: void
        !            90: vga_isa_attach(parent, self, aux)
        !            91:        struct device *parent, *self;
        !            92:        void *aux;
        !            93: {
        !            94:        struct isa_attach_args *ia = aux;
        !            95: #if 0
        !            96:        struct vga_isa_softc *sc = (struct vga_isa_softc *)self;
        !            97: #endif
        !            98:
        !            99:        printf("\n");
        !           100:
        !           101:        vga_common_attach(self, ia->ia_iot, ia->ia_memt,
        !           102:                          WSDISPLAY_TYPE_ISAVGA);
        !           103: }
        !           104:
        !           105: int
        !           106: vga_isa_cnattach(iot, memt)
        !           107:        bus_space_tag_t iot, memt;
        !           108: {
        !           109:        return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
        !           110: }