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      1 /*	$NetBSD: gdium_genfb.c,v 1.7 2023/12/20 14:12:25 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: gdium_genfb.c,v 1.7 2023/12/20 14:12:25 thorpej Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/buf.h>
     35 #include <sys/bus.h>
     36 #include <sys/conf.h>
     37 #include <sys/device.h>
     38 #include <sys/ioctl.h>
     39 #include <sys/kernel.h>
     40 #include <sys/systm.h>
     41 
     42 #include <dev/wscons/wsconsio.h>
     43 #include <dev/wscons/wsdisplayvar.h>
     44 #include <dev/rasops/rasops.h>
     45 #include <dev/wsfont/wsfont.h>
     46 #include <dev/wscons/wsdisplay_vconsvar.h>
     47 
     48 #include <mips/bonito/bonitoreg.h>
     49 #include <evbmips/gdium/gdiumvar.h>
     50 #include <dev/pci/pcireg.h>
     51 #include <dev/pci/pcivar.h>
     52 
     53 #include "wsdisplay.h"
     54 
     55 /* we need a wsdisplay to do anything halfway useful */
     56 #if NWSDISPLAY > 0
     57 
     58 static struct vcons_screen gdium_console_screen;
     59 
     60 static struct wsscreen_descr gdium_stdscreen = {
     61 	.name = "std",
     62 };
     63 
     64 int
     65 gdium_cnattach(struct gdium_config *gc)
     66 {
     67 	struct rasops_info * const ri = &gdium_console_screen.scr_ri;
     68 	long defattr;
     69 	pcireg_t reg;
     70 
     71 	wsfont_init();
     72 
     73 	/* set up rasops */
     74 	ri->ri_width = 1024;
     75 	ri->ri_height = 600;
     76 	ri->ri_depth = 16;
     77 	ri->ri_stride = 0x800;
     78 
     79 	/* read the mapping register for the frame buffer */
     80 	reg = pci_conf_read(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 14, 0),
     81 	    PCI_MAPREG_START);
     82 
     83 	ri->ri_bits = (char *)MIPS_PHYS_TO_KSEG1(BONITO_PCILO_BASE + reg);
     84 	ri->ri_flg = RI_CENTER | RI_NO_AUTO;
     85 
     86 	memset(ri->ri_bits, 0, 0x200000);
     87 
     88 	/* use as much of the screen as the font permits */
     89 	rasops_init(ri, 30, 80);
     90 
     91 	rasops_reconfig(ri, ri->ri_height / ri->ri_font->fontheight,
     92 	    ri->ri_width / ri->ri_font->fontwidth);
     93 
     94 	gdium_stdscreen.nrows = ri->ri_rows;
     95 	gdium_stdscreen.ncols = ri->ri_cols;
     96 	gdium_stdscreen.textops = &ri->ri_ops;
     97 	gdium_stdscreen.capabilities = ri->ri_caps;
     98 
     99 	ri->ri_ops.allocattr(ri, 0, ri->ri_rows - 1, 0, &defattr);
    100 
    101 	wsdisplay_preattach(&gdium_stdscreen, ri, 0, 0, defattr);
    102 
    103 	return 0;
    104 }
    105 #else	/* NWSDISPLAY > 0 */
    106 int
    107 gdium_cnattach(struct gdium_config *gc)
    108 {
    109 	return -1;
    110 }
    111 #endif
    112