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Annotation of 43BSDReno/sys/hpdev/grf_tc.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 is only permitted until one year after the first shipment
        !            11:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !            12:  * binary forms are permitted provided that: (1) source distributions retain
        !            13:  * this entire copyright notice and comment, and (2) distributions including
        !            14:  * binaries display the following acknowledgement:  This product includes
        !            15:  * software developed by the University of California, Berkeley and its
        !            16:  * contributors'' in the documentation or other materials provided with the
        !            17:  * distribution and in all advertising materials mentioning features or use
        !            18:  * of this software.  Neither the name of the University nor the names of
        !            19:  * its contributors may be used to endorse or promote products derived from
        !            20:  * this software without specific prior written permission.
        !            21:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            22:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            23:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            24:  *
        !            25:  * from: Utah $Hdr: grf_tc.c 1.13 89/08/25$
        !            26:  *
        !            27:  *     @(#)grf_tc.c    7.1 (Berkeley) 5/8/90
        !            28:  */
        !            29: 
        !            30: #include "grf.h"
        !            31: #if NGRF > 0
        !            32: 
        !            33: /*
        !            34:  * Graphics routines for TOPCAT frame buffer
        !            35:  */
        !            36: #include "param.h"
        !            37: #include "errno.h"
        !            38: 
        !            39: #include "grfioctl.h"
        !            40: #include "grfvar.h"
        !            41: #include "grf_tcreg.h"
        !            42: 
        !            43: #include "machine/cpu.h"
        !            44: 
        !            45: /*
        !            46:  * Initialize hardware.
        !            47:  * Must fill in the grfinfo structure in g_softc.
        !            48:  * Returns 0 if hardware not present, non-zero ow.
        !            49:  */
        !            50: tc_init(gp, addr)
        !            51:        struct grf_softc *gp;
        !            52:        u_char *addr;
        !            53: {
        !            54:        register struct tcboxfb *tp = (struct tcboxfb *) addr;
        !            55:        struct grfinfo *gi = &gp->g_display;
        !            56:        volatile u_char *fbp;
        !            57:        u_char save;
        !            58:        int fboff;
        !            59: 
        !            60: #if defined(HP360) || defined(HP370)
        !            61:        extern char grfregs[];
        !            62:        if (addr == (u_char *)grfregs)
        !            63:                gi->gd_regaddr = (caddr_t) DIOIIBASE;
        !            64:        else
        !            65: #endif
        !            66:        gi->gd_regaddr = (caddr_t) UNIOV(addr);
        !            67:        gi->gd_regsize = 0x10000;
        !            68:        gi->gd_fbwidth = (tp->fbwmsb << 8) | tp->fbwlsb;
        !            69:        gi->gd_fbheight = (tp->fbhmsb << 8) | tp->fbhlsb;
        !            70:        fboff = (tp->fbomsb << 8) | tp->fbolsb;
        !            71:        gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16);
        !            72: #if defined(HP360) || defined(HP370)
        !            73:        /*
        !            74:         * For DIO II space addresses offset is relative to the DIO II space.
        !            75:         * XXX: this should apply to all frame buffer types.
        !            76:         */
        !            77:        if (gi->gd_regaddr >= (caddr_t)DIOIIBASE)
        !            78:                gi->gd_fbaddr += (int) gi->gd_regaddr;
        !            79: #endif
        !            80:        gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
        !            81:        gi->gd_dwidth = (tp->dwmsb << 8) | tp->dwlsb;
        !            82:        gi->gd_dheight = (tp->dhmsb << 8) | tp->dhlsb;
        !            83:        gi->gd_planes = tp->num_planes;
        !            84:        gi->gd_colors = 1 << gi->gd_planes;
        !            85:        if (gi->gd_colors == 1) {
        !            86:                fbp = (u_char *) IOV(gi->gd_fbaddr);
        !            87:                tp->wen = ~0;
        !            88:                tp->prr = 0x3;
        !            89:                tp->fben = ~0;
        !            90:                save = *fbp;
        !            91:                *fbp = 0xFF;
        !            92:                gi->gd_colors = *fbp + 1;
        !            93:                *fbp = save;
        !            94:        }
        !            95:        return(1);
        !            96: }
        !            97: 
        !            98: /*
        !            99:  * Change the mode of the display.
        !           100:  * Right now all we can do is grfon/grfoff.
        !           101:  * Return a UNIX error number or 0 for success.
        !           102:  * Function may not be needed anymore.
        !           103:  */
        !           104: /*ARGSUSED*/
        !           105: tc_mode(gp, cmd)
        !           106:        struct grf_softc *gp;
        !           107: {
        !           108:        int error = 0;
        !           109: 
        !           110:        switch (cmd) {
        !           111:        case GM_GRFON:
        !           112:        case GM_GRFOFF:
        !           113:                break;
        !           114:        default:
        !           115:                error = EINVAL;
        !           116:                break;
        !           117:        }
        !           118:        return(error);
        !           119: }
        !           120: #endif

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