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tga_conf.c revision 1.4 
      1 /* $NetBSD: tga_conf.c,v 1.4 2000/04/02 18:59:32 nathanw 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/param.h>
     31 #include <sys/device.h>
     32 
     33 #include <dev/pci/pcivar.h>
     34 #include <dev/pci/tgareg.h>
     35 #include <dev/pci/tgavar.h>
     36 
     37 #include <dev/ic/bt485var.h>
     38 #include <dev/ic/bt463var.h>
     39 
     40 #undef KB
     41 #define KB		* 1024
     42 #undef MB
     43 #define	MB		* 1024 * 1024
     44 
     45 static const struct tga_conf tga_configs[TGA_TYPE_UNKNOWN] = {
     46 	/* TGA_TYPE_T8_01 */
     47 	{
     48 		"T8-01",
     49 		bt485_funcs,
     50 		8,
     51 		4 MB,
     52 		2 KB,
     53 		1,	{  2 MB,     0 },	{ 1 MB,    0 },
     54 		0,	{     0,     0 },	{    0,    0 },
     55 	},
     56 	/* TGA_TYPE_T8_02 */
     57 	{
     58 		"T8-02",
     59 		bt485_funcs,
     60 		8,
     61 		4 MB,
     62 		4 KB,
     63 		1,	{  2 MB,     0 },	{ 2 MB,    0 },
     64 		0,	{     0,     0 },	{    0,    0 },
     65 	},
     66 	/* TGA_TYPE_T8_22 */
     67 	{
     68 		"T8-22",
     69 		bt485_funcs,
     70 		8,
     71 		8 MB,
     72 		4 KB,
     73 		1,	{  4 MB,     0 },	{ 2 MB,    0 },
     74 		1,	{  6 MB,     0 },	{ 2 MB,    0 },
     75 	},
     76 	/* TGA_TYPE_T8_44 */
     77 	{
     78 		"T8-44",
     79 		bt485_funcs,
     80 		8,
     81 		16 MB,
     82 		4 KB,
     83 		2,	{  8 MB, 12 MB },	{ 2 MB, 2 MB },
     84 		2,	{ 10 MB, 14 MB },	{ 2 MB, 2 MB },
     85 	},
     86 	/* TGA_TYPE_T32_04 */
     87 	{
     88 		"T32-04",
     89 		bt463_funcs,
     90 		32,
     91 		16 MB,
     92 		8 KB,
     93 		1,	{  8 MB,     0 },	{ 4 MB,    0 },
     94 		0,	{     0,     0 },	{    0,    0 },
     95 	},
     96 	/* TGA_TYPE_T32_08 */
     97 	{
     98 		"T32-08",
     99 		bt463_funcs,
    100 		32,
    101 		16 MB,
    102 		16 KB,
    103 		1,	{  8 MB,    0 },	{ 8 MB,    0 },
    104 		0,	{     0,    0 },	{    0,    0 },
    105 	},
    106 	/* TGA_TYPE_T32_88 */
    107 	{
    108 		"T32-88",
    109 		bt463_funcs,
    110 		32,
    111 		32 MB,
    112 		16 KB,
    113 		1,	{ 16 MB,    0 },	{ 8 MB,    0 },
    114 		1,	{ 24 MB,    0 },	{ 8 MB,    0 },
    115 	},
    116 };
    117 
    118 #undef KB
    119 #undef MB
    120 
    121 int
    122 tga_identify(dc)
    123 	struct tga_devconfig *dc;
    124 {
    125 	int type;
    126 	int gder;
    127 	int deep, addrmask, wide;
    128 
    129 	gder = TGARREG(dc, TGA_REG_GDER);
    130 
    131 	deep = (gder & 0x1) != 0; /* XXX */
    132 	addrmask = (gder >> 2) & 0x7; /* XXX */
    133 	wide = (gder & 0x200) == 0; /* XXX */
    134 
    135 
    136 	type = TGA_TYPE_UNKNOWN;
    137 
    138 	if (!deep) {
    139 		/* 8bpp frame buffer */
    140 
    141 		if (addrmask == 0x0) {
    142 			/* 4MB core map; T8-01 or T8-02 */
    143 
    144 			if (!wide)
    145 				type = TGA_TYPE_T8_01;
    146 			else
    147 				type = TGA_TYPE_T8_02;
    148 		} else if (addrmask == 0x1) {
    149 			/* 8MB core map; T8-22 */
    150 
    151 			if (wide)			/* sanity */
    152 				type = TGA_TYPE_T8_22;
    153 		} else if (addrmask == 0x3) {
    154 			/* 16MB core map; T8-44 */
    155 
    156 			if (wide)			/* sanity */
    157 				type = TGA_TYPE_T8_44;
    158 		}
    159 	} else {
    160 		/* 32bpp frame buffer */
    161 
    162 		if (addrmask == 0x3) {
    163 			/* 16MB core map; T32-04 or T32-08 */
    164 
    165 			if (!wide)
    166 				type = TGA_TYPE_T32_04;
    167 			else
    168 				type = TGA_TYPE_T32_08;
    169 		} else if (addrmask == 0x7) {
    170 			/* 32MB core map; T32-88 */
    171 
    172 			if (wide)			/* sanity */
    173 				type = TGA_TYPE_T32_88;
    174 		}
    175 	}
    176 
    177 	return (type);
    178 }
    179 
    180 const struct tga_conf *
    181 tga_getconf(type)
    182 	int type;
    183 {
    184 
    185 	if (type >= 0 && type < TGA_TYPE_UNKNOWN)
    186 		return &tga_configs[type];
    187 
    188 	return (NULL);
    189 }
    190 
    191