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vga_isa.c revision 1.21 
      1 /* $NetBSD: vga_isa.c,v 1.21 2008/03/14 22:12:08 cube Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/cdefs.h>
     31 __KERNEL_RCSID(0, "$NetBSD: vga_isa.c,v 1.21 2008/03/14 22:12:08 cube Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/kernel.h>
     36 #include <sys/device.h>
     37 #include <sys/malloc.h>
     38 
     39 #include <dev/isa/isavar.h>
     40 
     41 #include <dev/ic/mc6845reg.h>
     42 #include <dev/ic/pcdisplayvar.h>
     43 #include <dev/ic/vgareg.h>
     44 #include <dev/ic/vgavar.h>
     45 #include <dev/isa/vga_isavar.h>
     46 
     47 #include <dev/wscons/wsconsio.h>
     48 #include <dev/wscons/wsdisplayvar.h>
     49 
     50 int	vga_isa_match(device_t, cfdata_t, void *);
     51 void	vga_isa_attach(device_t, device_t, void *);
     52 
     53 CFATTACH_DECL_NEW(vga_isa, sizeof(struct vga_softc),
     54     vga_isa_match, vga_isa_attach, NULL, NULL);
     55 
     56 int
     57 vga_isa_match(device_t parent, cfdata_t match, void *aux)
     58 {
     59 	struct isa_attach_args *ia = aux;
     60 
     61 	if (ISA_DIRECT_CONFIG(ia))
     62 		return (0);
     63 
     64 	/* If values are hardwired to something that they can't be, punt. */
     65 	if (ia->ia_nio < 1 ||
     66 	    (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT &&
     67 	     ia->ia_io[0].ir_addr != 0x3b0))
     68 		return (0);
     69 
     70 	if (ia->ia_niomem < 1 ||
     71 	    (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM &&
     72 	     ia->ia_iomem[0].ir_addr != 0xa0000))
     73 		return (0);
     74 	if (ia->ia_iomem[0].ir_size != 0 &&
     75 	    ia->ia_iomem[0].ir_size != 0x20000)
     76 		return (0);
     77 
     78 	if (ia->ia_nirq > 0 &&
     79 	    ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)
     80 		return (0);
     81 
     82 	if (ia->ia_ndrq > 0 &&
     83 	    ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)
     84 		return (0);
     85 
     86 	if (!vga_is_console(ia->ia_iot, WSDISPLAY_TYPE_ISAVGA) &&
     87 	    !vga_common_probe(ia->ia_iot, ia->ia_memt))
     88 		return (0);
     89 
     90 	ia->ia_nio = 1;
     91 	ia->ia_io[0].ir_addr = 0x3b0;	/* XXX mono 0x3b0 color 0x3c0 */
     92 	ia->ia_io[0].ir_size = 0x30;	/* XXX 0x20 */
     93 
     94 	ia->ia_niomem = 1;
     95 	ia->ia_iomem[0].ir_addr = 0xa0000;
     96 	ia->ia_iomem[0].ir_size = 0x20000;
     97 
     98 	ia->ia_nirq = 0;
     99 	ia->ia_ndrq = 0;
    100 
    101 	return (2);	/* more than generic pcdisplay */
    102 }
    103 
    104 void
    105 vga_isa_attach(device_t parent, device_t self, void *aux)
    106 {
    107 	struct vga_softc *sc = device_private(self);
    108 	struct isa_attach_args *ia = aux;
    109 
    110 	sc->sc_dev = self;
    111 	aprint_normal("\n");
    112 
    113 	vga_common_attach(sc, ia->ia_iot, ia->ia_memt, WSDISPLAY_TYPE_ISAVGA,
    114 	    0, NULL);
    115 }
    116 
    117 int
    118 vga_isa_cnattach(bus_space_tag_t iot, bus_space_tag_t memt)
    119 {
    120 
    121 	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
    122 }
    123