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Annotation of Net2/arch/hp300/dev/ite_subr.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 University of Utah.
        !             3:  * Copyright (c) 1990 The Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * This code is derived from software contributed to Berkeley by
        !             7:  * the Systems Programming Group of the University of Utah Computer
        !             8:  * Science Department.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  *
        !            38:  * from: Utah $Hdr: ite_subr.c 1.1 90/07/09$
        !            39:  *
        !            40:  *     @(#)ite_subr.c  7.4 (Berkeley) 5/4/91
        !            41:  */
        !            42: 
        !            43: #include "ite.h"
        !            44: #if NITE > 0
        !            45: 
        !            46: #include "param.h"
        !            47: #include "conf.h"
        !            48: #include "proc.h"
        !            49: #include "ioctl.h"
        !            50: #include "tty.h"
        !            51: #include "systm.h"
        !            52: 
        !            53: #include "itevar.h"
        !            54: #include "itereg.h"
        !            55: 
        !            56: #include "machine/cpu.h"
        !            57: 
        !            58: ite_devinfo(ip)
        !            59:        struct ite_softc *ip;
        !            60: {
        !            61:        struct fontinfo *fi;
        !            62:        struct font *fd;
        !            63: 
        !            64:        fi = (struct fontinfo *) ((*FONTROM << 8 | *(FONTROM + 2)) + REGADDR);
        !            65:        fd = (struct font *) ((fi->haddr << 8 | fi->laddr) + REGADDR);
        !            66: 
        !            67:        ip->ftheight = fd->fh;
        !            68:        ip->ftwidth  = fd->fw;
        !            69:        ip->fbwidth  = ITEREGS->fbwidth_h << 8 | ITEREGS->fbwidth_l;
        !            70:        ip->fbheight = ITEREGS->fbheight_h << 8 | ITEREGS->fbheight_l;
        !            71:        ip->dwidth   = ITEREGS->dispwidth_h << 8 | ITEREGS->dispwidth_l;
        !            72:        ip->dheight  = ITEREGS->dispheight_h << 8 | ITEREGS->dispheight_l;
        !            73:        ip->rows     = ip->dheight / ip->ftheight;
        !            74:        ip->cols     = ip->dwidth / ip->ftwidth;
        !            75: 
        !            76:        if (ip->fbwidth > ip->dwidth) {
        !            77:                /*
        !            78:                 * Stuff goes to right of display.
        !            79:                 */
        !            80:                ip->fontx    = ip->dwidth;
        !            81:                ip->fonty    = 0;
        !            82:                ip->cpl      = (ip->fbwidth - ip->dwidth) / ip->ftwidth;
        !            83:                ip->cblankx  = ip->dwidth;
        !            84:                ip->cblanky  = ip->fonty + ((128 / ip->cpl) +1) * ip->ftheight;
        !            85:        }
        !            86:        else {
        !            87:                /*
        !            88:                 * Stuff goes below the display.
        !            89:                 */
        !            90:                ip->fontx   = 0;
        !            91:                ip->fonty   = ip->dheight;
        !            92:                ip->cpl     = ip->fbwidth / ip->ftwidth;
        !            93:                ip->cblankx = 0;
        !            94:                ip->cblanky = ip->fonty + ((128 / ip->cpl) + 1) * ip->ftheight;
        !            95:        }
        !            96: }
        !            97: 
        !            98: ite_fontinit(ip)
        !            99:        register struct ite_softc *ip;
        !           100: {
        !           101:        struct fontinfo *fi;
        !           102:        struct font *fd;
        !           103:        register u_char *fbmem, *dp;
        !           104:        register int bn;
        !           105:        int c, l, b;
        !           106: 
        !           107:        fi = (struct fontinfo *) ((*FONTROM << 8 | *(FONTROM + 2)) + REGADDR);
        !           108:        fd = (struct font *) ((fi->haddr << 8 | fi->laddr) + REGADDR);
        !           109: 
        !           110:        dp = fd->data;
        !           111: 
        !           112:        for (c = 0; c < 128; c++) {
        !           113:                fbmem = (u_char *) FBBASE +
        !           114:                        (ip->fonty + (c / ip->cpl) * ip->ftheight) *
        !           115:                        ip->fbwidth;
        !           116:                fbmem += ip->fontx + (c % ip->cpl) * ip->ftwidth;
        !           117:                for (l = 0; l < ip->ftheight; l++) {
        !           118:                        bn = 7;
        !           119:                        for (b = 0; b < ip->ftwidth; b++) {
        !           120:                                if ((1 << bn) & *dp)
        !           121:                                        *fbmem++ = 1;
        !           122:                                else
        !           123:                                        *fbmem++ = 0;
        !           124:                                if (--bn < 0) {
        !           125:                                        bn = 7;
        !           126:                                        dp += 2;
        !           127:                                }
        !           128:                        }
        !           129:                        if (bn < 7)
        !           130:                                dp += 2;
        !           131:                        fbmem -= ip->ftwidth;
        !           132:                        fbmem += ip->fbwidth;
        !           133:                }
        !           134:        }
        !           135: 
        !           136: }
        !           137: #endif

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