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Annotation of Gnu-Mach/chips/fb_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: fb_misc.c
        !            28:  *     Author: Alessandro Forin, Carnegie Mellon University
        !            29:  *     Date:   7/91
        !            30:  *
        !            31:  *     Driver for the PMAG-AA simple mono framebuffer
        !            32:  *
        !            33:  */
        !            34: 
        !            35: #include <mfb.h>
        !            36: #if    (NMFB > 0)
        !            37: 
        !            38: /*
        !            39:  * NOTE: This driver relies heavily on the pm one.
        !            40:  */
        !            41: 
        !            42: #include <device/device_types.h>
        !            43: #include <chips/screen_defs.h>
        !            44: #include <chips/pm_defs.h>
        !            45: typedef pm_softc_t     fb_softc_t;
        !            46: 
        !            47: #include <chips/bt455.h>
        !            48: 
        !            49: /*
        !            50:  * Initialize color map, for kernel use
        !            51:  */
        !            52: fb_init_colormap(sc)
        !            53:        screen_softc_t  sc;
        !            54: {
        !            55:        fb_softc_t      *fb = (fb_softc_t*)sc->hw_state;
        !            56:        user_info_t     *up = sc->up;
        !            57:        color_map_t     Bg_Fg[2];
        !            58:        register int    i;
        !            59: 
        !            60:        bt455_init_colormap( fb->vdac_registers );
        !            61: 
        !            62:        /* init bg/fg colors */
        !            63:        for (i = 0; i < 3; i++) {
        !            64:                up->dev_dep_2.pm.Bg_color[i] = 0x00;
        !            65:                up->dev_dep_2.pm.Fg_color[i] = 0xff;
        !            66:        }
        !            67: 
        !            68:        Bg_Fg[0].red = Bg_Fg[0].green = Bg_Fg[0].blue = 0x00;
        !            69:        Bg_Fg[1].red = Bg_Fg[1].green = Bg_Fg[1].blue = 0xff;
        !            70:        bt455_cursor_color( fb->vdac_registers, Bg_Fg);
        !            71: }
        !            72: 
        !            73: /*
        !            74:  * Large viz small cursor
        !            75:  */
        !            76: fb_small_cursor_to_large(up, cursor)
        !            77:        user_info_t     *up;
        !            78:        cursor_sprite_t cursor;
        !            79: {
        !            80:        unsigned char   *curbytes, *sprite;
        !            81:        int             i;
        !            82:        /* Our cursor turns out mirrored, donno why */
        !            83:        static unsigned char    mirror[256] = {
        !            84:                0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 
        !            85:                0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 
        !            86:                0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 
        !            87:                0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 
        !            88:                0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 
        !            89:                0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 
        !            90:                0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 
        !            91:                0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 
        !            92:                0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 
        !            93:                0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 
        !            94:                0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 
        !            95:                0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 
        !            96:                0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 
        !            97:                0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 
        !            98:                0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 
        !            99:                0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 
        !           100:                0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 
        !           101:                0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 
        !           102:                0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 
        !           103:                0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 
        !           104:                0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 
        !           105:                0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 
        !           106:                0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 
        !           107:                0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 
        !           108:                0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 
        !           109:                0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 
        !           110:                0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 
        !           111:                0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 
        !           112:                0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 
        !           113:                0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 
        !           114:                0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 
        !           115:                0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
        !           116:        };
        !           117: 
        !           118:        /* Clear out old cursor */
        !           119:        bzero(  up->dev_dep_2.pm.cursor_sprite,
        !           120:                sizeof(up->dev_dep_2.pm.cursor_sprite));
        !           121: 
        !           122:        /* small cursor is 32x2 bytes, image(fg) first then mask(bg) */
        !           123:        curbytes = (unsigned char *) cursor;
        !           124: 
        !           125:        /* we have even byte --> image, odd byte --> mask;
        !           126:           line size is 8 bytes instead of 2 */
        !           127:        sprite   = (unsigned char *) up->dev_dep_2.pm.cursor_sprite;
        !           128: 
        !           129:        for (i = 0; i < 32; i += 2) {
        !           130:                *sprite++ = mirror[curbytes[i]];        /* fg */
        !           131:                *sprite++ = mirror[curbytes[i + 32]];   /* bg */
        !           132:                *sprite++ = mirror[curbytes[i + 1]];    /* fg */
        !           133:                *sprite++ = mirror[curbytes[i + 33]];   /* bg */
        !           134:                sprite += 12; /* skip rest of the line */
        !           135:        }
        !           136: }
        !           137: 
        !           138: /*
        !           139:  * Device-specific set status
        !           140:  */
        !           141: fb_set_status(sc, flavor, status, status_count)
        !           142:        screen_softc_t  sc;
        !           143:        int             flavor;
        !           144:        dev_status_t    status;
        !           145:        unsigned int    status_count;
        !           146: {
        !           147:        fb_softc_t              *fb = (fb_softc_t*) sc->hw_state;
        !           148: 
        !           149:        switch (flavor) {
        !           150: 
        !           151:        case SCREEN_ADJ_MAPPED_INFO:
        !           152:                return pm_set_status(sc, flavor, status, status_count);
        !           153: 
        !           154:        case SCREEN_LOAD_CURSOR:
        !           155: 
        !           156:                if (status_count < sizeof(cursor_sprite_t)/sizeof(int))
        !           157:                        return D_INVALID_SIZE;
        !           158:                fb_small_cursor_to_large(sc->up, (cursor_sprite_t*) status);
        !           159: 
        !           160:                /* Fall through */
        !           161: 
        !           162:        case SCREEN_LOAD_CURSOR_LONG: { /* 3max/3min only */
        !           163: 
        !           164:                sc->flags |= SCREEN_BEING_UPDATED;
        !           165:                bt431_cursor_sprite(fb->cursor_registers, sc->up->dev_dep_2.pm.cursor_sprite);
        !           166:                sc->flags &= ~SCREEN_BEING_UPDATED;
        !           167: 
        !           168:                break;
        !           169:        }
        !           170:             
        !           171:        case SCREEN_SET_CURSOR_COLOR: {
        !           172:                color_map_t             c[2];
        !           173:                register cursor_color_t *cc = (cursor_color_t*) status;
        !           174: 
        !           175:                c[0].red   = cc->Bg_rgb[0];
        !           176:                c[0].green = cc->Bg_rgb[1];
        !           177:                c[0].blue  = cc->Bg_rgb[2];
        !           178:                c[1].red   = cc->Fg_rgb[0];
        !           179:                c[1].green = cc->Fg_rgb[1];
        !           180:                c[1].blue  = cc->Fg_rgb[2];
        !           181: 
        !           182:                sc->flags |= SCREEN_BEING_UPDATED;
        !           183:                bt455_cursor_color (fb->vdac_registers, c );
        !           184:                sc->flags &= ~SCREEN_BEING_UPDATED;
        !           185: 
        !           186:                break;
        !           187:        }
        !           188: 
        !           189:        case SCREEN_SET_CMAP_ENTRY: {
        !           190:                color_map_entry_t       *e = (color_map_entry_t*) status;
        !           191: 
        !           192:                if (e->index < 8) { /* 8&9 are fg&bg, do not touch */
        !           193:                        sc->flags |= SCREEN_BEING_UPDATED;
        !           194:                        bt455_load_colormap_entry( fb->vdac_registers, e->index, &e->value);
        !           195:                        sc->flags &= ~SCREEN_BEING_UPDATED;
        !           196:                }
        !           197:                break;
        !           198:        }
        !           199: 
        !           200:        default:
        !           201:                return D_INVALID_OPERATION;
        !           202:        }
        !           203:        return D_SUCCESS;
        !           204: }
        !           205: 
        !           206: /*
        !           207:  * Do what's needed when X exits
        !           208:  */
        !           209: fb_soft_reset(sc)
        !           210:        screen_softc_t  sc;
        !           211: {
        !           212:        fb_softc_t      *fb = (fb_softc_t*) sc->hw_state;
        !           213:        user_info_t     *up =  sc->up;
        !           214:        extern cursor_sprite_t  bt431_default_cursor;
        !           215: 
        !           216:        /*
        !           217:         * Restore params in mapped structure
        !           218:         */
        !           219:        pm_init_screen_params(sc,up);
        !           220:        up->row = up->max_row - 1;
        !           221: 
        !           222:        up->dev_dep_2.pm.x26 = 2; /* you do not want to know */
        !           223:        up->dev_dep_1.pm.x18 = (short*)2;
        !           224: 
        !           225:        /*
        !           226:         * Restore RAMDAC chip to default state, and init cursor
        !           227:         */
        !           228:        bt455_init(fb->vdac_registers);
        !           229:        bt431_init(fb->cursor_registers);
        !           230: 
        !           231:        /*
        !           232:         * Load kernel's cursor sprite
        !           233:         */
        !           234:        bt431_cursor_sprite(fb->cursor_registers, bt431_default_cursor);
        !           235: 
        !           236:        /*
        !           237:         * Color map and cursor color
        !           238:         */
        !           239:        fb_init_colormap(sc);
        !           240: }
        !           241: 
        !           242: #endif (NMFB > 0)

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