Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/chips/dc503.c
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1 /* 2 * Mach Operating System 3 * Copyright (c) 1991,1990,1989 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 */ 26 /* 27 * HISTORY 28 * $Log: dc503.c,v $ 29 * Revision 2.8 93/02/05 08:05:06 danner 30 * Everybody needs this because of the cursor, simplified 31 * defines. 32 * [93/02/04 01:24:17 af] 33 * 34 * Revision 2.7 91/08/24 11:51:38 af 35 * Moved padding of regmap here. Rid of "struct pcc" hack, now 36 * we understand a pm_softc, and compatibles. 37 * [91/08/02 02:27:53 af] 38 * 39 * Revision 2.6 91/06/19 11:47:22 rvb 40 * mips->DECSTATION; vax->VAXSTATION 41 * [91/06/12 14:01:22 rvb] 42 * 43 * File moved here from mips/PMAX since it tries to be generic; 44 * it is used on the PMAX and the Vax3100. 45 * [91/06/04 rvb] 46 * 47 * Revision 2.5 91/05/14 17:20:33 mrt 48 * Correcting copyright 49 * 50 * Revision 2.4 91/02/05 17:40:14 mrt 51 * Added author notices 52 * [91/02/04 11:12:34 mrt] 53 * 54 * Changed to use new Mach copyright 55 * [91/02/02 12:10:24 mrt] 56 * 57 * Revision 2.3 90/12/05 23:30:42 af 58 * Works now. 59 * [90/12/03 23:12:48 af] 60 * 61 * Revision 2.1.1.1 90/11/01 03:43:21 af 62 * Created, from the DEC specs: 63 * "DECstation 3100 Desktop Workstation Functional Specification" 64 * Workstation Systems Engineering, Palo Alto, CA. Aug 28, 1990. 65 * [90/09/03 af] 66 */ 67 /* 68 * File: dc503.h 69 * Author: Alessandro Forin, Carnegie Mellon University 70 * Date: 9/90 71 * 72 * Routines for the DEC DC503 Programmable Cursor Chip 73 */ 74 #include <platforms.h> 75 76 #include <chips/pm_defs.h> 77 #include <chips/dc503.h> 78 79 80 #if defined(DECSTATION) || defined(VAXSTATION) 81 82 typedef struct { 83 volatile unsigned short pcc_cmdr; /* all regs are wo */ 84 short pad0; 85 volatile unsigned short pcc_xpos; 86 short pad1; 87 volatile unsigned short pcc_ypos; 88 short pad2; 89 volatile unsigned short pcc_xmin1; 90 short pad3; 91 volatile unsigned short pcc_xmax1; 92 short pad4; 93 volatile unsigned short pcc_ymin1; 94 short pad5; 95 volatile unsigned short pcc_ymax1; 96 short pad6[9]; 97 volatile unsigned short pcc_xmin2; 98 short pad7; 99 volatile unsigned short pcc_xmax2; 100 short pad8; 101 volatile unsigned short pcc_ymin2; 102 short pad9; 103 volatile unsigned short pcc_ymax2; 104 short pad10; 105 volatile unsigned short pcc_memory; 106 short pad11; 107 } dc503_padded_regmap_t; 108 109 #else 110 111 typedef dc503_regmap_t dc503_padded_regmap_t; 112 113 #endif 114 115 #ifdef VAXSTATION 116 #define X_CSHIFT 216 117 #define Y_CSHIFT 34 118 #define wbflush() 119 #define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB | DC503_CMD_HSHI) 120 #endif /*VAXSTATION*/ 121 122 /* defaults, for the innocents */ 123 124 #ifndef X_CSHIFT 125 #define X_CSHIFT 212 126 #define Y_CSHIFT 34 127 #define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB) 128 #endif 129 130 /* 131 * Cursor 132 */ 133 dc503_pos_cursor( regs, x, y) 134 dc503_padded_regmap_t *regs; 135 { 136 regs->pcc_xpos = x + X_CSHIFT; 137 regs->pcc_ypos = y + Y_CSHIFT; 138 wbflush(); 139 } 140 141 dc503_load_cursor( pm, cursor) 142 pm_softc_t *pm; 143 unsigned short *cursor; 144 { 145 dc503_padded_regmap_t *regs; 146 register int i; 147 148 regs = (dc503_padded_regmap_t*)pm->cursor_registers; 149 150 pm->cursor_state |= DC503_CMD_LODSA; 151 regs->pcc_cmdr = pm->cursor_state; 152 wbflush(); 153 for (i = 0; i < 32; i++) { 154 regs->pcc_memory = *cursor++; 155 wbflush(); 156 } 157 pm->cursor_state &= ~DC503_CMD_LODSA; 158 regs->pcc_cmdr = pm->cursor_state; 159 } 160 161 162 unsigned short dc503_default_cursor[16+16] = { 163 /* Plane A */ 164 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 165 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 166 /* Plane B */ 167 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 168 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff 169 }; 170 171 /* 172 * Vert retrace interrupt 173 */ 174 dc503_vretrace( pm, on) 175 pm_softc_t *pm; 176 { 177 if (on) 178 pm->cursor_state |= DC503_CMD_ENRG2; 179 else 180 pm->cursor_state &= ~DC503_CMD_ENRG2; 181 ((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state; 182 } 183 184 /* 185 * Video on/off 186 */ 187 dc503_video_on( pm, up) 188 pm_softc_t *pm; 189 { 190 pm->cursor_state = DC503_CMD_ENPA | (pm->cursor_state & ~DC503_CMD_FOPB); 191 ((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state; 192 } 193 194 dc503_video_off( pm, up) 195 pm_softc_t *pm; 196 { 197 pm->cursor_state = DC503_CMD_FOPB | (pm->cursor_state & ~DC503_CMD_ENPA); 198 ((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state; 199 } 200 201 202 /* 203 * Initialization 204 */ 205 dc503_init( pm ) 206 pm_softc_t *pm; 207 { 208 dc503_padded_regmap_t *regs; 209 210 regs = (dc503_padded_regmap_t*)pm->cursor_registers; 211 212 dc503_load_cursor( pm, dc503_default_cursor); 213 dc503_pos_cursor( regs, 0, 0); /* XXX off screen */ 214 215 regs->pcc_xmin1 = 0; /* test only */ 216 regs->pcc_xmax1 = 0; 217 regs->pcc_ymin1 = 0; 218 regs->pcc_ymax1 = 0; 219 220 regs->pcc_xmin2 = 212; /* vert retrace detector */ 221 regs->pcc_xmax2 = 212+1023; 222 regs->pcc_ymin2 = 34+863; 223 regs->pcc_ymax2 = 34+863; 224 225 #if 0 226 regs->pcc_cmdr = DC503_CMD_FOPB | DC503_CMD_VBHI;/* reset */ 227 #endif 228 pm->cursor_state = PCC_STATE; 229 regs->pcc_cmdr = pm->cursor_state; 230 }
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