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Annotation of Gnu-Mach/chips/dc503.c, revision 1.1

1.1     ! root        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  [email protected]
        !            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:  *     File: dc503.h
        !            28:  *     Author: Alessandro Forin, Carnegie Mellon University
        !            29:  *     Date:   9/90
        !            30:  *
        !            31:  *     Routines for the DEC DC503 Programmable Cursor Chip
        !            32:  */
        !            33: #include <platforms.h>
        !            34: 
        !            35: #include <chips/pm_defs.h>
        !            36: #include <chips/dc503.h>
        !            37: 
        !            38: 
        !            39: #if    defined(DECSTATION) || defined(VAXSTATION)
        !            40: 
        !            41: typedef struct {
        !            42:        volatile unsigned short pcc_cmdr;       /* all regs are wo */
        !            43:        short                                           pad0;
        !            44:        volatile unsigned short pcc_xpos;
        !            45:        short                                           pad1;
        !            46:        volatile unsigned short pcc_ypos;
        !            47:        short                                           pad2;
        !            48:        volatile unsigned short pcc_xmin1;
        !            49:        short                                           pad3;
        !            50:        volatile unsigned short pcc_xmax1;
        !            51:        short                                           pad4;
        !            52:        volatile unsigned short pcc_ymin1;
        !            53:        short                                           pad5;
        !            54:        volatile unsigned short pcc_ymax1;
        !            55:        short                                           pad6[9];
        !            56:        volatile unsigned short pcc_xmin2;
        !            57:        short                                           pad7;
        !            58:        volatile unsigned short pcc_xmax2;
        !            59:        short                                           pad8;
        !            60:        volatile unsigned short pcc_ymin2;
        !            61:        short                                           pad9;
        !            62:        volatile unsigned short pcc_ymax2;
        !            63:        short                                           pad10;
        !            64:        volatile unsigned short pcc_memory;
        !            65:        short                                           pad11;
        !            66: } dc503_padded_regmap_t;
        !            67: 
        !            68: #else
        !            69: 
        !            70: typedef dc503_regmap_t dc503_padded_regmap_t;
        !            71: 
        !            72: #endif
        !            73: 
        !            74: #ifdef VAXSTATION
        !            75: #define X_CSHIFT 216
        !            76: #define Y_CSHIFT 34
        !            77: #define wbflush()
        !            78: #define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB | DC503_CMD_HSHI)
        !            79: #endif /*VAXSTATION*/
        !            80: 
        !            81: /* defaults, for the innocents */
        !            82: 
        !            83: #ifndef        X_CSHIFT
        !            84: #define X_CSHIFT 212
        !            85: #define Y_CSHIFT 34
        !            86: #define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB)
        !            87: #endif
        !            88: 
        !            89: /*
        !            90:  * Cursor
        !            91:  */
        !            92: dc503_pos_cursor( regs, x, y)
        !            93:        dc503_padded_regmap_t   *regs;
        !            94: {
        !            95:        regs->pcc_xpos = x + X_CSHIFT;
        !            96:        regs->pcc_ypos = y + Y_CSHIFT;
        !            97:        wbflush();
        !            98: }
        !            99: 
        !           100: dc503_load_cursor( pm, cursor)
        !           101:        pm_softc_t      *pm;
        !           102:        unsigned short  *cursor;
        !           103: {
        !           104:        dc503_padded_regmap_t   *regs;
        !           105:        register int    i;
        !           106: 
        !           107:        regs = (dc503_padded_regmap_t*)pm->cursor_registers;
        !           108: 
        !           109:        pm->cursor_state |= DC503_CMD_LODSA;
        !           110:        regs->pcc_cmdr = pm->cursor_state;
        !           111:        wbflush();
        !           112:        for (i = 0; i < 32; i++) {
        !           113:                regs->pcc_memory = *cursor++;
        !           114:                wbflush();
        !           115:        }
        !           116:        pm->cursor_state &= ~DC503_CMD_LODSA;
        !           117:        regs->pcc_cmdr = pm->cursor_state;
        !           118: }
        !           119: 
        !           120: 
        !           121: unsigned short dc503_default_cursor[16+16] = {
        !           122: /* Plane A */
        !           123:        0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
        !           124:        0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
        !           125: /* Plane B */
        !           126:        0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
        !           127:        0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff
        !           128: };
        !           129: 
        !           130: /*
        !           131:  * Vert retrace interrupt
        !           132:  */
        !           133: dc503_vretrace( pm, on)
        !           134:        pm_softc_t      *pm;
        !           135: {
        !           136:        if (on)
        !           137:                pm->cursor_state |= DC503_CMD_ENRG2;
        !           138:        else
        !           139:                pm->cursor_state &= ~DC503_CMD_ENRG2;
        !           140:        ((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
        !           141: }
        !           142: 
        !           143: /*
        !           144:  * Video on/off
        !           145:  */
        !           146: dc503_video_on( pm, up)
        !           147:        pm_softc_t      *pm;
        !           148: {
        !           149:        pm->cursor_state = DC503_CMD_ENPA | (pm->cursor_state & ~DC503_CMD_FOPB);
        !           150:        ((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
        !           151: }
        !           152: 
        !           153: dc503_video_off( pm, up)
        !           154:        pm_softc_t      *pm;
        !           155: {
        !           156:        pm->cursor_state = DC503_CMD_FOPB | (pm->cursor_state & ~DC503_CMD_ENPA);
        !           157:        ((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
        !           158: }
        !           159: 
        !           160: 
        !           161: /*
        !           162:  * Initialization
        !           163:  */
        !           164: dc503_init( pm )
        !           165:        pm_softc_t      *pm;
        !           166: {
        !           167:        dc503_padded_regmap_t   *regs;
        !           168: 
        !           169:        regs = (dc503_padded_regmap_t*)pm->cursor_registers;
        !           170: 
        !           171:        dc503_load_cursor( pm, dc503_default_cursor);
        !           172:        dc503_pos_cursor( regs, 0, 0);  /* XXX off screen */
        !           173: 
        !           174:        regs->pcc_xmin1 = 0;    /* test only */
        !           175:        regs->pcc_xmax1 = 0;
        !           176:        regs->pcc_ymin1 = 0;
        !           177:        regs->pcc_ymax1 = 0;
        !           178: 
        !           179:        regs->pcc_xmin2 = 212;  /* vert retrace detector */
        !           180:        regs->pcc_xmax2 = 212+1023;
        !           181:        regs->pcc_ymin2 = 34+863;
        !           182:        regs->pcc_ymax2 = 34+863;
        !           183: 
        !           184: #if 0
        !           185:        regs->pcc_cmdr = DC503_CMD_FOPB | DC503_CMD_VBHI;/* reset */
        !           186: #endif
        !           187:        pm->cursor_state = PCC_STATE;
        !           188:        regs->pcc_cmdr = pm->cursor_state;
        !           189: }
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