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      1 /* $NetBSD: vga_isa.c,v 1.22 2022/09/25 17:09:36 thorpej 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 1.22 2022/09/25 17:09:36 thorpej Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/kernel.h>
     36 #include <sys/device.h>
     37 
     38 #include <dev/isa/isavar.h>
     39 
     40 #include <dev/ic/mc6845reg.h>
     41 #include <dev/ic/pcdisplayvar.h>
     42 #include <dev/ic/vgareg.h>
     43 #include <dev/ic/vgavar.h>
     44 #include <dev/isa/vga_isavar.h>
     45 
     46 #include <dev/wscons/wsconsio.h>
     47 #include <dev/wscons/wsdisplayvar.h>
     48 
     49 int	vga_isa_match(device_t, cfdata_t, void *);
     50 void	vga_isa_attach(device_t, device_t, void *);
     51 
     52 CFATTACH_DECL_NEW(vga_isa, sizeof(struct vga_softc),
     53     vga_isa_match, vga_isa_attach, NULL, NULL);
     54 
     55 int
     56 vga_isa_match(device_t parent, cfdata_t match, void *aux)
     57 {
     58 	struct isa_attach_args *ia = aux;
     59 
     60 	if (ISA_DIRECT_CONFIG(ia))
     61 		return (0);
     62 
     63 	/* If values are hardwired to something that they can't be, punt. */
     64 	if (ia->ia_nio < 1 ||
     65 	    (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT &&
     66 	     ia->ia_io[0].ir_addr != 0x3b0))
     67 		return (0);
     68 
     69 	if (ia->ia_niomem < 1 ||
     70 	    (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM &&
     71 	     ia->ia_iomem[0].ir_addr != 0xa0000))
     72 		return (0);
     73 	if (ia->ia_iomem[0].ir_size != 0 &&
     74 	    ia->ia_iomem[0].ir_size != 0x20000)
     75 		return (0);
     76 
     77 	if (ia->ia_nirq > 0 &&
     78 	    ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ)
     79 		return (0);
     80 
     81 	if (ia->ia_ndrq > 0 &&
     82 	    ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ)
     83 		return (0);
     84 
     85 	if (!vga_is_console(ia->ia_iot, WSDISPLAY_TYPE_ISAVGA) &&
     86 	    !vga_common_probe(ia->ia_iot, ia->ia_memt))
     87 		return (0);
     88 
     89 	ia->ia_nio = 1;
     90 	ia->ia_io[0].ir_addr = 0x3b0;	/* XXX mono 0x3b0 color 0x3c0 */
     91 	ia->ia_io[0].ir_size = 0x30;	/* XXX 0x20 */
     92 
     93 	ia->ia_niomem = 1;
     94 	ia->ia_iomem[0].ir_addr = 0xa0000;
     95 	ia->ia_iomem[0].ir_size = 0x20000;
     96 
     97 	ia->ia_nirq = 0;
     98 	ia->ia_ndrq = 0;
     99 
    100 	return (2);	/* more than generic pcdisplay */
    101 }
    102 
    103 void
    104 vga_isa_attach(device_t parent, device_t self, void *aux)
    105 {
    106 	struct vga_softc *sc = device_private(self);
    107 	struct isa_attach_args *ia = aux;
    108 
    109 	sc->sc_dev = self;
    110 	aprint_normal("\n");
    111 
    112 	vga_common_attach(sc, ia->ia_iot, ia->ia_memt, WSDISPLAY_TYPE_ISAVGA,
    113 	    0, NULL);
    114 }
    115 
    116 int
    117 vga_isa_cnattach(bus_space_tag_t iot, bus_space_tag_t memt)
    118 {
    119 
    120 	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_ISAVGA, 1));
    121 }
    122