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Annotation of Gnu-Mach/chips/xcfb_misc.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: xcfb_misc.c
        !            28:  *     Author: Alessandro Forin, Carnegie Mellon University
        !            29:  *     Date:   1/92
        !            30:  *
        !            31:  *     Driver for the MAXine color framebuffer
        !            32:  *
        !            33:  */
        !            34: 
        !            35: #include <xcfb.h>
        !            36: #if    (NXCFB > 0)
        !            37: 
        !            38: /*
        !            39:  * NOTE: This driver relies heavily on the pm one.
        !            40:  */
        !            41: 
        !            42: #include <device/device_types.h>
        !            43: 
        !            44: #include <chips/screen_defs.h>
        !            45: 
        !            46: #include <chips/xcfb_monitor.h>
        !            47: #include <chips/pm_defs.h>
        !            48: typedef pm_softc_t     xcfb_softc_t;
        !            49: 
        !            50: #include <chips/ims332.h>
        !            51: #define        ims332          cursor_registers
        !            52: 
        !            53: 
        !            54: /*
        !            55:  * Initialize color map, for kernel use
        !            56:  */
        !            57: xcfb_init_colormap(sc)
        !            58:        screen_softc_t  sc;
        !            59: {
        !            60:        xcfb_softc_t    *xcfb = (xcfb_softc_t*)sc->hw_state;
        !            61:        user_info_t     *up = sc->up;
        !            62:        color_map_t     Bg_Fg[2];
        !            63:        register int    i;
        !            64: 
        !            65:        ims332_init_colormap( xcfb->ims332 );
        !            66: 
        !            67:        /* init bg/fg colors */
        !            68:        for (i = 0; i < 3; i++) {
        !            69:                up->dev_dep_2.pm.Bg_color[i] = 0x00;
        !            70:                up->dev_dep_2.pm.Fg_color[i] = 0xff;
        !            71:        }
        !            72: 
        !            73:        Bg_Fg[0].red = Bg_Fg[0].green = Bg_Fg[0].blue = 0x00;
        !            74:        Bg_Fg[1].red = Bg_Fg[1].green = Bg_Fg[1].blue = 0xff;
        !            75:        ims332_cursor_color( xcfb->ims332, Bg_Fg);
        !            76: }
        !            77: 
        !            78: /*
        !            79:  * Large viz small cursor
        !            80:  */
        !            81: xcfb_small_cursor_to_large(up, cursor)
        !            82:        user_info_t     *up;
        !            83:        cursor_sprite_t cursor;
        !            84: {
        !            85:        unsigned short  new_cursor[32];
        !            86:        unsigned char   *cursor_bytes;
        !            87:        char            *sprite;
        !            88:        register int    i;
        !            89: 
        !            90:        /* Clear out old cursor */
        !            91:        bzero(  up->dev_dep_2.pm.cursor_sprite,
        !            92:                sizeof(up->dev_dep_2.pm.cursor_sprite));
        !            93: 
        !            94:        /* small cursor is 32x2 bytes, fg first */
        !            95:        cursor_bytes = (unsigned char *) cursor;
        !            96: 
        !            97:        /* use the upper left corner of the large cursor
        !            98:         * as a 64x1 cursor, fg&bg alternated */
        !            99:        for (i = 0; i < 32; i++) {
        !           100:                register short          nc = 0;
        !           101:                register unsigned char  fg, bg;
        !           102:                register int            j, k;
        !           103: 
        !           104:                fg = cursor_bytes[i];
        !           105:                bg = cursor_bytes[i + 32];
        !           106:                bg &= ~fg;
        !           107:                for (j = 1, k = 0; j < 256; j <<= 1) {
        !           108:                        nc |= (bg & j) << (k++);
        !           109:                        nc |= (fg & j) << (k);
        !           110:                }
        !           111:                new_cursor[i] = nc;
        !           112:        }
        !           113: 
        !           114:        /* Now stick it in the proper place */
        !           115: 
        !           116:        cursor_bytes = (unsigned char *) new_cursor;
        !           117:        sprite = up->dev_dep_2.pm.cursor_sprite;
        !           118:        for (i = 0; i < 64; i += 4) {
        !           119:                *sprite++ = cursor_bytes[i + 0];
        !           120:                *sprite++ = cursor_bytes[i + 1];
        !           121:                *sprite++ = cursor_bytes[i + 2];
        !           122:                *sprite++ = cursor_bytes[i + 3];
        !           123:                sprite += 12; /* skip rest of the line */
        !           124:        }
        !           125: }
        !           126: 
        !           127: 
        !           128: /*
        !           129:  * Device-specific set status
        !           130:  */
        !           131: xcfb_set_status(sc, flavor, status, status_count)
        !           132:        screen_softc_t  sc;
        !           133:        int             flavor;
        !           134:        dev_status_t    status;
        !           135:        unsigned int    status_count;
        !           136: {
        !           137:        xcfb_softc_t            *xcfb = (xcfb_softc_t*) sc->hw_state;
        !           138: 
        !           139:        switch (flavor) {
        !           140: 
        !           141:        case SCREEN_ADJ_MAPPED_INFO:
        !           142:                return pm_set_status(sc, flavor, status, status_count);
        !           143: 
        !           144:        case SCREEN_LOAD_CURSOR:
        !           145: 
        !           146:                if (status_count < sizeof(cursor_sprite_t)/sizeof(int))
        !           147:                        return D_INVALID_SIZE;
        !           148: 
        !           149:                xcfb_small_cursor_to_large(sc->up, (cursor_sprite_t*) status);
        !           150: 
        !           151:                /* Fall through */
        !           152: 
        !           153:        case SCREEN_LOAD_CURSOR_LONG: /* 3max only */
        !           154: 
        !           155:                sc->flags |= SCREEN_BEING_UPDATED;
        !           156:                ims332_cursor_sprite(xcfb->ims332, sc->up->dev_dep_2.pm.cursor_sprite);
        !           157:                sc->flags &= ~SCREEN_BEING_UPDATED;
        !           158: 
        !           159:                break;
        !           160:             
        !           161:        case SCREEN_SET_CURSOR_COLOR: {
        !           162:                color_map_t             c[2];
        !           163:                register cursor_color_t *cc = (cursor_color_t*) status;
        !           164: 
        !           165:                c[0].red   = cc->Bg_rgb[0];
        !           166:                c[0].green = cc->Bg_rgb[1];
        !           167:                c[0].blue  = cc->Bg_rgb[2];
        !           168:                c[1].red   = cc->Fg_rgb[0];
        !           169:                c[1].green = cc->Fg_rgb[1];
        !           170:                c[1].blue  = cc->Fg_rgb[2];
        !           171: 
        !           172:                sc->flags |= SCREEN_BEING_UPDATED;
        !           173:                ims332_cursor_color (xcfb->ims332, c );
        !           174:                sc->flags &= ~SCREEN_BEING_UPDATED;
        !           175: 
        !           176:                break;
        !           177:        }
        !           178: 
        !           179:        case SCREEN_SET_CMAP_ENTRY: {
        !           180:                color_map_entry_t       *e = (color_map_entry_t*) status;
        !           181: 
        !           182:                if (e->index < 256) {
        !           183:                        sc->flags |= SCREEN_BEING_UPDATED;
        !           184:                        ims332_load_colormap_entry( xcfb->ims332, e->index, &e->value);
        !           185:                        sc->flags &= ~SCREEN_BEING_UPDATED;
        !           186:                }
        !           187:                break;
        !           188:        }
        !           189: 
        !           190:        default:
        !           191:                return D_INVALID_OPERATION;
        !           192:        }
        !           193:        return D_SUCCESS;
        !           194: }
        !           195: 
        !           196: /*
        !           197:  * Hardware initialization
        !           198:  */
        !           199: xcfb_init_screen(xcfb)
        !           200:        xcfb_softc_t *xcfb;
        !           201: {
        !           202:        extern xcfb_monitor_type_t xcfb_get_monitor_type();
        !           203: 
        !           204:        ims332_init( xcfb->ims332, xcfb->vdac_registers, xcfb_get_monitor_type());
        !           205: }
        !           206: 
        !           207: /*
        !           208:  * Do what's needed when X exits
        !           209:  */
        !           210: xcfb_soft_reset(sc)
        !           211:        screen_softc_t  sc;
        !           212: {
        !           213:        xcfb_softc_t    *xcfb = (xcfb_softc_t*) sc->hw_state;
        !           214:        user_info_t     *up =  sc->up;
        !           215:        extern cursor_sprite_t  dc503_default_cursor;
        !           216: 
        !           217:        /*
        !           218:         * Restore params in mapped structure
        !           219:         */
        !           220:        pm_init_screen_params(sc,up);
        !           221:        up->row = up->max_row - 1;
        !           222: 
        !           223:        up->dev_dep_2.pm.x26 = 2; /* you do not want to know */
        !           224:        up->dev_dep_1.pm.x18 = (short*)2;
        !           225: 
        !           226:        /*
        !           227:         * Restore RAMDAC chip to default state
        !           228:         */
        !           229:        xcfb_init_screen(xcfb);
        !           230: 
        !           231:        /*
        !           232:         * Load kernel's cursor sprite: just use the same pmax one
        !           233:         */
        !           234:        xcfb_small_cursor_to_large(up, dc503_default_cursor);
        !           235:        ims332_cursor_sprite(xcfb->ims332, up->dev_dep_2.pm.cursor_sprite);
        !           236: 
        !           237:        /*
        !           238:         * Color map and cursor color
        !           239:         */
        !           240:        xcfb_init_colormap(sc);
        !           241: }
        !           242: 
        !           243: 
        !           244: 
        !           245: 
        !           246: #endif (NXCFB > 0)

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