sys/dev/isa/vga_isa.c

   1 /* $NetBSD: vga_isa.c,v 1.20 2006/11/16 01:33:00 christos 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@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 1.20 2006/11/16 01:33:00 christos 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 }