1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * controlfb_hw.h: Constants of all sorts for controlfb 4 * 5 * Copyright (C) 1998 Daniel Jacobowitz <dan@debian.org> 6 * 7 * Based on an awful lot of code, including: 8 * 9 * control.c: Console support for PowerMac "control" display adaptor. 10 * Copyright (C) 1996 Paul Mackerras. 11 * 12 * The so far unpublished platinumfb.c 13 * Copyright (C) 1998 Jon Howell 14 */ 15 16/* 17 * Structure of the registers for the RADACAL colormap device. 18 */ 19struct cmap_regs { 20 unsigned char addr; /* index for both cmap and misc registers */ 21 char pad1[15]; 22 unsigned char crsr; /* cursor palette */ 23 char pad2[15]; 24 unsigned char dat; /* RADACAL misc register data */ 25 char pad3[15]; 26 unsigned char lut; /* cmap data */ 27 char pad4[15]; 28}; 29 30/* 31 * Structure of the registers for the "control" display adaptor. 32 */ 33#define PAD(x) char x[12] 34 35struct preg { /* padded register */ 36 unsigned r; 37 char pad[12]; 38}; 39 40struct control_regs { 41 struct preg vcount; /* vertical counter */ 42 /* Vertical parameters are in units of 1/2 scan line */ 43 struct preg vswin; /* between vsblank and vssync */ 44 struct preg vsblank; /* vert start blank */ 45 struct preg veblank; /* vert end blank (display start) */ 46 struct preg vewin; /* between vesync and veblank */ 47 struct preg vesync; /* vert end sync */ 48 struct preg vssync; /* vert start sync */ 49 struct preg vperiod; /* vert period */ 50 struct preg piped; /* pipe delay hardware cursor */ 51 /* Horizontal params are in units of 2 pixels */ 52 struct preg hperiod; /* horiz period - 2 */ 53 struct preg hsblank; /* horiz start blank */ 54 struct preg heblank; /* horiz end blank */ 55 struct preg hesync; /* horiz end sync */ 56 struct preg hssync; /* horiz start sync */ 57 struct preg heq; /* half horiz sync len */ 58 struct preg hlfln; /* half horiz period */ 59 struct preg hserr; /* horiz period - horiz sync len */ 60 struct preg cnttst; 61 struct preg ctrl; /* display control */ 62 struct preg start_addr; /* start address: 5 lsbs zero */ 63 struct preg pitch; /* addrs diff between scan lines */ 64 struct preg mon_sense; /* monitor sense bits */ 65 struct preg vram_attr; /* enable vram banks */ 66 struct preg mode; 67 struct preg rfrcnt; /* refresh count */ 68 struct preg intr_ena; /* interrupt enable */ 69 struct preg intr_stat; /* interrupt status */ 70 struct preg res[5]; 71}; 72 73struct control_regints { 74 /* Vertical parameters are in units of 1/2 scan line */ 75 unsigned vswin; /* between vsblank and vssync */ 76 unsigned vsblank; /* vert start blank */ 77 unsigned veblank; /* vert end blank (display start) */ 78 unsigned vewin; /* between vesync and veblank */ 79 unsigned vesync; /* vert end sync */ 80 unsigned vssync; /* vert start sync */ 81 unsigned vperiod; /* vert period */ 82 unsigned piped; /* pipe delay hardware cursor */ 83 /* Horizontal params are in units of 2 pixels */ 84 /* Except, apparently, for hres > 1024 (or == 1280?) */ 85 unsigned hperiod; /* horiz period - 2 */ 86 unsigned hsblank; /* horiz start blank */ 87 unsigned heblank; /* horiz end blank */ 88 unsigned hesync; /* horiz end sync */ 89 unsigned hssync; /* horiz start sync */ 90 unsigned heq; /* half horiz sync len */ 91 unsigned hlfln; /* half horiz period */ 92 unsigned hserr; /* horiz period - horiz sync len */ 93}; 94 95/* 96 * Dot clock rate is 97 * 3.9064MHz * 2**clock_params[2] * clock_params[1] / clock_params[0]. 98 */ 99struct control_regvals { 100 unsigned regs[16]; /* for vswin .. hserr */ 101 unsigned char mode; 102 unsigned char radacal_ctrl; 103 unsigned char clock_params[3]; 104}; 105 106#define CTRLFB_OFF 16 /* position of pixel 0 in frame buffer */ 107 108 109/* 110 * Best cmode supported by control 111 */ 112struct max_cmodes { 113 int m[2]; /* 0: 2MB vram, 1: 4MB vram */ 114}; 115 116/* 117 * Video modes supported by macmodes.c 118 */ 119static struct max_cmodes control_mac_modes[] = { 120 {{-1,-1}}, /* 512x384, 60Hz interlaced (NTSC) */ 121 {{-1,-1}}, /* 512x384, 60Hz */ 122 {{-1,-1}}, /* 640x480, 50Hz interlaced (PAL) */ 123 {{-1,-1}}, /* 640x480, 60Hz interlaced (NTSC) */ 124 {{ 2, 2}}, /* 640x480, 60Hz (VGA) */ 125 {{ 2, 2}}, /* 640x480, 67Hz */ 126 {{-1,-1}}, /* 640x870, 75Hz (portrait) */ 127 {{-1,-1}}, /* 768x576, 50Hz (PAL full frame) */ 128 {{ 2, 2}}, /* 800x600, 56Hz */ 129 {{ 2, 2}}, /* 800x600, 60Hz */ 130 {{ 2, 2}}, /* 800x600, 72Hz */ 131 {{ 2, 2}}, /* 800x600, 75Hz */ 132 {{ 1, 2}}, /* 832x624, 75Hz */ 133 {{ 1, 2}}, /* 1024x768, 60Hz */ 134 {{ 1, 2}}, /* 1024x768, 70Hz (or 72Hz?) */ 135 {{ 1, 2}}, /* 1024x768, 75Hz (VESA) */ 136 {{ 1, 2}}, /* 1024x768, 75Hz */ 137 {{ 1, 2}}, /* 1152x870, 75Hz */ 138 {{ 0, 1}}, /* 1280x960, 75Hz */ 139 {{ 0, 1}}, /* 1280x1024, 75Hz */ 140 {{ 1, 2}}, /* 1152x768, 60Hz */ 141 {{ 0, 1}}, /* 1600x1024, 60Hz */ 142}; 143 144