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tga_conf.c revision 1.1 
      1 /* $NetBSD: tga_conf.c,v 1.1 1998/04/15 20:16:32 drochner 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 #undef KB
     38 #define KB		* 1024
     39 #undef MB
     40 #define	MB		* 1024 * 1024
     41 
     42 static const struct tga_conf tga_configs[TGA_TYPE_UNKNOWN] = {
     43 	/* TGA_TYPE_T8_01 */
     44 	{
     45 		"T8-01",
     46 		&tga_ramdac_bt485,
     47 		8,
     48 		4 MB,
     49 		2 KB,
     50 		1,	{  2 MB,     0 },	{ 1 MB,    0 },
     51 		0,	{     0,     0 },	{    0,    0 },
     52 	},
     53 	/* TGA_TYPE_T8_02 */
     54 	{
     55 		"T8-02",
     56 		&tga_ramdac_bt485,
     57 		8,
     58 		4 MB,
     59 		4 KB,
     60 		1,	{  2 MB,     0 },	{ 2 MB,    0 },
     61 		0,	{     0,     0 },	{    0,    0 },
     62 	},
     63 	/* TGA_TYPE_T8_22 */
     64 	{
     65 		"T8-22",
     66 		&tga_ramdac_bt485,
     67 		8,
     68 		8 MB,
     69 		4 KB,
     70 		1,	{  4 MB,     0 },	{ 2 MB,    0 },
     71 		1,	{  6 MB,     0 },	{ 2 MB,    0 },
     72 	},
     73 	/* TGA_TYPE_T8_44 */
     74 	{
     75 		"T8-44",
     76 		&tga_ramdac_bt485,
     77 		8,
     78 		16 MB,
     79 		4 KB,
     80 		2,	{  8 MB, 12 MB },	{ 2 MB, 2 MB },
     81 		2,	{ 10 MB, 14 MB },	{ 2 MB, 2 MB },
     82 	},
     83 	/* TGA_TYPE_T32_04 */
     84 	{
     85 		"T32-04",
     86 		&tga_ramdac_bt463,
     87 		32,
     88 		16 MB,
     89 		8 KB,
     90 		1,	{  8 MB,     0 },	{ 4 MB,    0 },
     91 		0,	{     0,     0 },	{    0,    0 },
     92 	},
     93 	/* TGA_TYPE_T32_08 */
     94 	{
     95 		"T32-08",
     96 		&tga_ramdac_bt463,
     97 		32,
     98 		16 MB,
     99 		16 KB,
    100 		1,	{  8 MB,    0 },	{ 8 MB,    0 },
    101 		0,	{     0,    0 },	{    0,    0 },
    102 	},
    103 	/* TGA_TYPE_T32_88 */
    104 	{
    105 		"T32-88",
    106 		&tga_ramdac_bt463,
    107 		32,
    108 		32 MB,
    109 		16 KB,
    110 		1,	{ 16 MB,    0 },	{ 8 MB,    0 },
    111 		1,	{ 24 MB,    0 },	{ 8 MB,    0 },
    112 	},
    113 };
    114 
    115 #undef KB
    116 #undef MB
    117 
    118 int
    119 tga_identify(regs)
    120 	tga_reg_t *regs;
    121 {
    122 	int type;
    123 	int deep, addrmask, wide;
    124 
    125 	deep = (regs[TGA_REG_GDER] & 0x1) != 0;		/* XXX */
    126 	addrmask = ((regs[TGA_REG_GDER] >> 2) & 0x7);	/* XXX */
    127 	wide = (regs[TGA_REG_GDER] & 0x200) == 0;	/* XXX */
    128 
    129 	type = TGA_TYPE_UNKNOWN;
    130 
    131 	if (!deep) {
    132 		/* 8bpp frame buffer */
    133 
    134 		if (addrmask == 0x0) {
    135 			/* 4MB core map; T8-01 or T8-02 */
    136 
    137 			if (!wide)
    138 				type = TGA_TYPE_T8_01;
    139 			else
    140 				type = TGA_TYPE_T8_02;
    141 		} else if (addrmask == 0x1) {
    142 			/* 8MB core map; T8-22 */
    143 
    144 			if (wide)			/* sanity */
    145 				type = TGA_TYPE_T8_22;
    146 		} else if (addrmask == 0x3) {
    147 			/* 16MB core map; T8-44 */
    148 
    149 			if (wide)			/* sanity */
    150 				type = TGA_TYPE_T8_44;
    151 		}
    152 	} else {
    153 		/* 32bpp frame buffer */
    154 
    155 		if (addrmask == 0x3) {
    156 			/* 16MB core map; T32-04 or T32-08 */
    157 
    158 			if (!wide)
    159 				type = TGA_TYPE_T32_04;
    160 			else
    161 				type = TGA_TYPE_T32_08;
    162 		} else if (addrmask == 0x7) {
    163 			/* 32MB core map; T32-88 */
    164 
    165 			if (wide)			/* sanity */
    166 				type = TGA_TYPE_T32_88;
    167 		}
    168 	}
    169 
    170 	return (type);
    171 }
    172 
    173 const struct tga_conf *
    174 tga_getconf(type)
    175 	int type;
    176 {
    177 
    178 	if (type >= 0 && type < TGA_TYPE_UNKNOWN)
    179 		return &tga_configs[type];
    180 
    181 	return (NULL);
    182 }
    183 
    184