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      1 /* $NetBSD: tga_conf.c,v 1.7 2009/03/14 15:36:19 dsl 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: tga_conf.c,v 1.7 2009/03/14 15:36:19 dsl Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/device.h>
     36 
     37 #include <dev/pci/pcivar.h>
     38 #include <dev/pci/tgareg.h>
     39 #include <dev/pci/tgavar.h>
     40 
     41 #include <dev/ic/bt485var.h>
     42 #include <dev/ic/bt463var.h>
     43 #include <dev/ic/ibm561var.h>
     44 
     45 #undef KB
     46 #define KB		* 1024
     47 #undef MB
     48 #define	MB		* 1024 * 1024
     49 
     50 static const struct tga_conf tga_configs[TGA_TYPE_UNKNOWN] = {
     51 	/* TGA_TYPE_T8_01 */
     52 	{
     53 		"T8-01",
     54 		bt485_funcs,
     55 		8,
     56 		4 MB,
     57 		2 KB,
     58 		1,	{  2 MB,     0 },	{ 1 MB,    0 },
     59 		0,	{     0,     0 },	{    0,    0 },
     60 	},
     61 	/* TGA_TYPE_T8_02 */
     62 	{
     63 		"T8-02",
     64 		bt485_funcs,
     65 		8,
     66 		4 MB,
     67 		4 KB,
     68 		1,	{  2 MB,     0 },	{ 2 MB,    0 },
     69 		0,	{     0,     0 },	{    0,    0 },
     70 	},
     71 	/* TGA_TYPE_T8_22 */
     72 	{
     73 		"T8-22",
     74 		bt485_funcs,
     75 		8,
     76 		8 MB,
     77 		4 KB,
     78 		1,	{  4 MB,     0 },	{ 2 MB,    0 },
     79 		1,	{  6 MB,     0 },	{ 2 MB,    0 },
     80 	},
     81 	/* TGA_TYPE_T8_44 */
     82 	{
     83 		"T8-44",
     84 		bt485_funcs,
     85 		8,
     86 		16 MB,
     87 		4 KB,
     88 		2,	{  8 MB, 12 MB },	{ 2 MB, 2 MB },
     89 		2,	{ 10 MB, 14 MB },	{ 2 MB, 2 MB },
     90 	},
     91 	/* TGA_TYPE_T32_04 */
     92 	{
     93 		"T32-04",
     94 		bt463_funcs,
     95 		32,
     96 		16 MB,
     97 		8 KB,
     98 		1,	{  8 MB,     0 },	{ 4 MB,    0 },
     99 		0,	{     0,     0 },	{    0,    0 },
    100 	},
    101 	/* TGA_TYPE_T32_08 */
    102 	{
    103 		"T32-08",
    104 		bt463_funcs,
    105 		32,
    106 		16 MB,
    107 		16 KB,
    108 		1,	{  8 MB,    0 },	{ 8 MB,    0 },
    109 		0,	{     0,    0 },	{    0,    0 },
    110 	},
    111 	/* TGA_TYPE_T32_88 */
    112 	{
    113 		"T32-88",
    114 		bt463_funcs,
    115 		32,
    116 		32 MB,
    117 		16 KB,
    118 		1,	{ 16 MB,    0 },	{ 8 MB,    0 },
    119 		1,	{ 24 MB,    0 },	{ 8 MB,    0 },
    120 	},
    121 	/* TGA_TYPE_POWERSTORM_4D20 */
    122 	/* XXX: These numbers may be incorrect */
    123 	{
    124 		"PS4d20",
    125 		ibm561_funcs,
    126 		32,
    127 		32 MB,
    128 		16 KB,
    129 		1,	{ 16 MB,    0 },	{ 8 MB,    0 },
    130 		1,	{ 24 MB,    0 },	{ 8 MB,    0 },
    131 	}
    132 };
    133 
    134 #undef KB
    135 #undef MB
    136 
    137 int
    138 tga_identify(struct tga_devconfig *dc)
    139 {
    140 	int type;
    141 	int gder;
    142 	int grev;
    143 	int deep, addrmask, wide;
    144 	int tga2;
    145 
    146 	gder = TGARREG(dc, TGA_REG_GDER);
    147 	grev = TGARREG(dc, TGA_REG_GREV);
    148 
    149 	deep = (gder & 0x1) != 0; /* XXX */
    150 	addrmask = (gder >> 2) & 0x7; /* XXX */
    151 	wide = (gder & 0x200) == 0; /* XXX */
    152 	tga2 = (grev & 0x20) != 0;
    153 
    154 	type = TGA_TYPE_UNKNOWN;
    155 
    156 	if (!deep) {
    157 		/* 8bpp frame buffer */
    158 
    159 		if (addrmask == 0x0) {
    160 			/* 4MB core map; T8-01 or T8-02 */
    161 
    162 			if (!wide)
    163 				type = TGA_TYPE_T8_01;
    164 			else
    165 				type = TGA_TYPE_T8_02;
    166 		} else if (addrmask == 0x1) {
    167 			/* 8MB core map; T8-22 */
    168 
    169 			if (wide)			/* sanity */
    170 				type = TGA_TYPE_T8_22;
    171 		} else if (addrmask == 0x3) {
    172 			/* 16MB core map; T8-44 */
    173 
    174 			if (wide)			/* sanity */
    175 				type = TGA_TYPE_T8_44;
    176 		}
    177 	} else {
    178 		/* 32bpp frame buffer */
    179 		if (addrmask == 0x00 && tga2 && wide) {
    180 			/* My PowerStorm 4d20 shows up this way? */
    181 			type = TGA_TYPE_POWERSTORM_4D20;
    182 		}
    183 
    184 		if (addrmask == 0x3) {
    185 			/* 16MB core map; T32-04 or T32-08 */
    186 
    187 			if (!wide)
    188 				type = TGA_TYPE_T32_04;
    189 			else
    190 				type = TGA_TYPE_T32_08;
    191 		} else if (addrmask == 0x7) {
    192 			/* 32MB core map; T32-88 */
    193 
    194 			if (wide && !tga2)			/* sanity */
    195 				type = TGA_TYPE_T32_88;
    196 		}
    197 	}
    198 
    199 	return (type);
    200 }
    201 
    202 const struct tga_conf *
    203 tga_getconf(int type)
    204 {
    205 
    206 	if (type >= 0 && type < TGA_TYPE_UNKNOWN)
    207 		return &tga_configs[type];
    208 
    209 	return (NULL);
    210 }
    211