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Annotation of 43BSDReno/sys/hpdev/grf_rb.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 $Hdr: grf_rb.c 1.10 89/04/11$
        !            26:  *
        !            27:  *     @(#)grf_rb.c    7.2 (Berkeley) 5/25/90
        !            28:  */
        !            29: 
        !            30: #include "grf.h"
        !            31: #if NGRF > 0
        !            32: 
        !            33: /*
        !            34:  * Graphics routines for the Renaissance, HP98720 Graphics system.
        !            35:  */
        !            36: #include "param.h"
        !            37: #include "errno.h"
        !            38: 
        !            39: #include "grfioctl.h"
        !            40: #include "grfvar.h"
        !            41: #include "grf_rbreg.h"
        !            42: 
        !            43: #include "machine/cpu.h"
        !            44: 
        !            45: /*
        !            46:  * Initialize hardware.
        !            47:  * Must point g_display at a grfinfo structure describing the hardware.
        !            48:  * Returns 0 if hardware not present, non-zero ow.
        !            49:  */
        !            50: rb_init(gp, addr)
        !            51:        struct grf_softc *gp;
        !            52:        u_char *addr;
        !            53: {
        !            54:        register struct rboxfb *rbp;
        !            55:        struct grfinfo *gi = &gp->g_display;
        !            56:        int fboff;
        !            57: 
        !            58:        rbp = (struct rboxfb *) addr;
        !            59:        gi->gd_regaddr = (caddr_t) UNIOV(addr);
        !            60:        gi->gd_regsize = 0x20000;
        !            61:        gi->gd_fbwidth = (rbp->fbwmsb << 8) | rbp->fbwlsb;
        !            62:        gi->gd_fbheight = (rbp->fbhmsb << 8) | rbp->fbhlsb;
        !            63:        fboff = (rbp->fbomsb << 8) | rbp->fbolsb;
        !            64:        gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16);
        !            65:        gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
        !            66:        gi->gd_dwidth = (rbp->dwmsb << 8) | rbp->dwlsb;
        !            67:        gi->gd_dheight = (rbp->dwmsb << 8) | rbp->dwlsb;
        !            68:        gi->gd_planes = 0;      /* ?? */
        !            69:        gi->gd_colors = 256;
        !            70:        return(1);
        !            71: }
        !            72: 
        !            73: /*
        !            74:  * Change the mode of the display.
        !            75:  * Right now all we can do is grfon/grfoff.
        !            76:  * Return a UNIX error number or 0 for success.
        !            77:  */
        !            78: rb_mode(gp, cmd)
        !            79:        register struct grf_softc *gp;
        !            80: {
        !            81:        register struct rboxfb *rbp;
        !            82:        int error = 0;
        !            83: 
        !            84:        rbp = (struct rboxfb *) IOV(gp->g_display.gd_regaddr);
        !            85:        switch (cmd) {
        !            86:        /*
        !            87:         * The minimal register info here is from the Renaissance X driver.
        !            88:         */
        !            89:        case GM_GRFON:
        !            90:        case GM_GRFOFF:
        !            91:                break;
        !            92:        case GM_GRFOVON:
        !            93:                rbp->write_enable = 0;
        !            94:                rbp->opwen = 0xF;
        !            95:                rbp->drive = 0x10;
        !            96:                break;
        !            97:        case GM_GRFOVOFF:
        !            98:                rbp->opwen = 0;
        !            99:                rbp->write_enable = 0xffffffff;
        !           100:                rbp->drive = 0x01;
        !           101:                break;
        !           102:        default:
        !           103:                error = EINVAL;
        !           104:                break;
        !           105:        }
        !           106:        return(error);
        !           107: }
        !           108: 
        !           109: #endif

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