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      1 /*	$NetBSD: grf_tv.c,v 1.15 2011/02/08 20:20:25 rmind Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: Utah $Hdr: grf_tc.c 1.20 93/08/13$
     37  *
     38  *	@(#)grf_tc.c	8.4 (Berkeley) 1/12/94
     39  */
     40 
     41 /*
     42  * Graphics routines for the X68K native custom chip set.
     43  */
     44 
     45 #include <sys/cdefs.h>
     46 __KERNEL_RCSID(0, "$NetBSD: grf_tv.c,v 1.15 2011/02/08 20:20:25 rmind Exp $");
     47 
     48 #include <sys/param.h>
     49 #include <sys/device.h>
     50 #include <sys/errno.h>
     51 
     52 #include <machine/cpu.h>
     53 #include <machine/grfioctl.h>
     54 
     55 #include <x68k/dev/grfvar.h>
     56 #include <x68k/x68k/iodevice.h>
     57 
     58 int cc_init(struct grf_softc *, void *);
     59 int cc_mode(struct grf_softc *, u_long, void *);
     60 
     61 /* Initialize hardware.
     62  * Must fill in the grfinfo structure in g_softc.
     63  * Returns 0 if hardware not present, non-zero ow.
     64  */
     65 int
     66 cc_init(struct grf_softc *gp, void *addr)
     67 {
     68 	struct grfinfo *gi = &gp->g_display;
     69 
     70 	gi->gd_fbwidth  = 1024;	/* XXX */
     71 	gi->gd_fbheight = 1024;	/* XXX */
     72 	gi->gd_planes  = 4;	/* XXX */
     73 	gi->gd_regaddr = (void *)0x00e80000;	/* XXX */
     74 	gi->gd_regsize = 0x00004000;		/* XXX */
     75 	gi->gd_fbaddr  = (void *)0x00e00000;	/* XXX */
     76 	gi->gd_fbsize  = gi->gd_fbwidth / 8 * gi->gd_fbheight * gi->gd_planes;
     77 	gp->g_regkva   = addr;
     78 	gp->g_fbkva    = addr;
     79 	switch(IODEVbase->io_sram[0x1d]) {
     80 	case 18:
     81 		/*
     82 		 * mode 18, 24kHz
     83 		 */
     84 		gi->gd_dwidth  = 1024;
     85 		gi->gd_dheight =  848;
     86 		break;
     87 	case 19:
     88 		/*
     89 		 * mode 19, 31kHz VGA mode
     90 		 */
     91 		gi->gd_dwidth  = 640;
     92 		gi->gd_dheight = 480;
     93 		break;
     94 	default:
     95 		/*
     96 		 * mode 16, 31kHz (default)
     97 		 */
     98 		gi->gd_dwidth  = 768;
     99 		gi->gd_dheight = 512;
    100 		break;
    101 	}
    102 	gi->gd_colors  = 1 << gi->gd_planes;
    103 
    104 	return 1;
    105 }
    106 
    107 /*
    108  * Change the mode of the display.
    109  * Right now all we can do is grfon/grfoff.
    110  * Return a UNIX error number or 0 for success.
    111  */
    112 /*ARGSUSED*/
    113 int
    114 cc_mode(struct grf_softc *gp, u_long cmd, void *data)
    115 {
    116 	int error = 0;
    117 
    118 	switch (cmd) {
    119 	case GM_GRFON:
    120 	case GM_GRFOFF:
    121 		break;
    122 
    123 	/*
    124 	 * Remember UVA of mapping for GCDESCRIBE.
    125 	 * XXX this should be per-process.
    126 	 */
    127 	case GM_MAP:
    128 		gp->g_data = data;
    129 		break;
    130 
    131 	case GM_UNMAP:
    132 		gp->g_data = 0;
    133 		break;
    134 
    135 	case GM_GRFSETVMODE:
    136 		if (*(int *)data == 1) {
    137 			struct grfinfo *gi = &gp->g_display;
    138 			volatile struct crtc *crtc = &IODEVbase->io_crtc;
    139 			/* Reset CRTC, set dwidth and dheight accordingly */
    140 			crtc->r20 = (crtc->r20 & 0xFF00) | 0x1a;
    141 			crtc->r08 = 0x1b;
    142 			crtc->r07 = 0x19c;
    143 			crtc->r06 = 0x1c;
    144 			crtc->r05 = 0x02;
    145 			crtc->r04 = 0x019f;
    146 			crtc->r03 = 0x9a;
    147 			crtc->r02 = 0x1a;
    148 			crtc->r01 = 0x09;
    149 			crtc->r00 = 0xa4;
    150 			gi->gd_dwidth = 1024;
    151 			gi->gd_dheight = 768;
    152 		}
    153 		break;
    154 
    155 	default:
    156 		error = EINVAL;
    157 		break;
    158 	}
    159 	return error;
    160 }
    161