video/fbdev/valkyriefb.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * valkyriefb.h: Constants of all sorts for valkyriefb
0004  *
0005  *  Created 8 August 1998 by
0006  *  Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel
0007  *
0008  * Vmode-switching changes and vmode 15/17 modifications created 29 August
0009  * 1998 by Barry K. Nathan <barryn@pobox.com>.
0010  *
0011  * vmode 10 changed by Steven Borley <sjb@salix.demon.co.uk>, 14 mai 2000
0012  *
0013  * Ported to 68k Macintosh by David Huggins-Daines <dhd@debian.org>
0014  *
0015  * Based directly on:
0016  *
0017  *  controlfb.h: Constants of all sorts for controlfb
0018  *  Copyright (C) 1998 Daniel Jacobowitz <dan@debian.org>
0019  *
0020  *  pmc-valkyrie.h: Console support for PowerMac "control" display adaptor.
0021  *  Copyright (C) 1997 Paul Mackerras.
0022  *
0023  *  pmc-valkyrie.c: Console support for PowerMac "control" display adaptor.
0024  *  Copyright (C) 1997 Paul Mackerras.
0025  *
0026  * and indirectly from:
0027  *
0028  *  pmc-control.h: Console support for PowerMac "control" display adaptor.
0029  *  Copyright (C) 1997 Paul Mackerras.
0030  *
0031  *  pmc-control.c: Console support for PowerMac "control" display adaptor.
0032  *  Copyright (C) 1996 Paul Mackerras.
0033  *
0034  *  platinumfb.c: Console support for PowerMac "platinum" display adaptor.
0035  *  Copyright (C) 1998 Jon Howell
0036  */
0037
0038 #ifdef CONFIG_MAC
0039 /* Valkyrie registers are word-aligned on m68k */
0040 #define VALKYRIE_REG_PADSIZE    3
0041 #else
0042 #define VALKYRIE_REG_PADSIZE    7
0043 #endif
0044
0045 /*
0046  * Structure of the registers for the Valkyrie colormap registers.
0047  */
0048 struct cmap_regs {
0049     unsigned char addr;
0050     char pad1[VALKYRIE_REG_PADSIZE];
0051     unsigned char lut;
0052 };
0053
0054 /*
0055  * Structure of the registers for the "valkyrie" display adaptor.
0056  */
0057
0058 struct vpreg {          /* padded register */
0059     unsigned char r;
0060     char pad[VALKYRIE_REG_PADSIZE];
0061 };
0062
0063
0064 struct valkyrie_regs {
0065     struct vpreg mode;
0066     struct vpreg depth;
0067     struct vpreg status;
0068     struct vpreg reg3;
0069     struct vpreg intr;
0070     struct vpreg reg5;
0071     struct vpreg intr_enb;
0072     struct vpreg msense;
0073 };
0074
0075 /*
0076  * Register initialization tables for the valkyrie display.
0077  *
0078  * Dot clock rate is
0079  * 3.9064MHz * 2**clock_params[2] * clock_params[1] / clock_params[0].
0080  */
0081 struct valkyrie_regvals {
0082     unsigned char mode;
0083     unsigned char clock_params[3];
0084     int pitch[2];       /* bytes/line, indexed by color_mode */
0085     int hres;
0086     int vres;
0087 };
0088
0089 #ifndef CONFIG_MAC
0090 /* Register values for 1024x768, 75Hz mode (17) */
0091 /* I'm not sure which mode this is (16 or 17), so I'm defining it as 17,
0092  * since the equivalent mode in controlfb (which I adapted this from) is
0093  * also 17. Just because MacOS can't do this on Valkyrie doesn't mean we
0094  * can't! :)
0095  *
0096  * I was going to use 12, 31, 3, which I found by myself, but instead I'm
0097  * using 11, 28, 3 like controlfb, for consistency's sake.
0098  */
0099
0100 static struct valkyrie_regvals valkyrie_reg_init_17 = {
0101     15,
0102     { 11, 28, 3 },  /* pixel clock = 79.55MHz for V=74.50Hz */
0103     { 1024, 0 },
0104     1024, 768
0105 };
0106
0107 /* Register values for 1024x768, 72Hz mode (15) */
0108 /* This used to be 12, 30, 3 for pixel clock = 78.12MHz for V=72.12Hz, but
0109  * that didn't match MacOS in the same video mode on this chip, and it also
0110  * caused the 15" Apple Studio Display to not work in this mode. While this
0111  * mode still doesn't match MacOS exactly (as far as I can tell), it's a lot
0112  * closer now, and it works with the Apple Studio Display.
0113  *
0114  * Yes, even though MacOS calls it "72Hz", in reality it's about 70Hz.
0115  */
0116 static struct valkyrie_regvals valkyrie_reg_init_15 = {
0117     15,
0118     { 12, 29, 3 },  /* pixel clock = 75.52MHz for V=69.71Hz? */
0119             /* I interpolated the V=69.71 from the vmode 14 and old 15
0120              * numbers. Is this result correct?
0121              */
0122     { 1024, 0 },
0123     1024, 768
0124 };
0125
0126 /* Register values for 1024x768, 60Hz mode (14) */
0127 static struct valkyrie_regvals valkyrie_reg_init_14 = {
0128     14,
0129     { 15, 31, 3 },  /* pixel clock = 64.58MHz for V=59.62Hz */
0130     { 1024, 0 },
0131     1024, 768
0132 };
0133 #endif /* !defined CONFIG_MAC */
0134
0135 /* Register values for 832x624, 75Hz mode (13) */
0136 static struct valkyrie_regvals valkyrie_reg_init_13 = {
0137     9,
0138     { 23, 42, 3 },  /* pixel clock = 57.07MHz for V=74.27Hz */
0139     { 832, 0 },
0140     832, 624
0141 };
0142
0143 /* Register values for 800x600, 72Hz mode (11) */
0144 static struct valkyrie_regvals valkyrie_reg_init_11 = {
0145     13,
0146     { 17, 27, 3 },  /* pixel clock = 49.63MHz for V=71.66Hz */
0147     { 800, 0 },
0148     800, 600
0149 };
0150
0151 /* Register values for 800x600, 60Hz mode (10) */
0152 static struct valkyrie_regvals valkyrie_reg_init_10 = {
0153     12,
0154     { 25, 32, 3 },  /* pixel clock = 40.0015MHz,
0155                      used to be 20,53,2, pixel clock 41.41MHz for V=59.78Hz */
0156     { 800, 1600 },
0157     800, 600
0158 };
0159
0160 /* Register values for 640x480, 67Hz mode (6) */
0161 static struct valkyrie_regvals valkyrie_reg_init_6 = {
0162     6,
0163     { 14, 27, 2 },  /* pixel clock = 30.13MHz for V=66.43Hz */
0164     { 640, 1280 },
0165     640, 480
0166 };
0167
0168 /* Register values for 640x480, 60Hz mode (5) */
0169 static struct valkyrie_regvals valkyrie_reg_init_5 = {
0170     11,
0171     { 23, 37, 2 },  /* pixel clock = 25.14MHz for V=59.85Hz */
0172     { 640, 1280 },
0173     640, 480
0174 };
0175
0176 static struct valkyrie_regvals *valkyrie_reg_init[VMODE_MAX] = {
0177     NULL,
0178     NULL,
0179     NULL,
0180     NULL,
0181     &valkyrie_reg_init_5,
0182     &valkyrie_reg_init_6,
0183     NULL,
0184     NULL,
0185     NULL,
0186     &valkyrie_reg_init_10,
0187     &valkyrie_reg_init_11,
0188     NULL,
0189     &valkyrie_reg_init_13,
0190 #ifndef CONFIG_MAC
0191     &valkyrie_reg_init_14,
0192     &valkyrie_reg_init_15,
0193     NULL,
0194     &valkyrie_reg_init_17,
0195 #endif
0196 };