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Annotation of Net2/arch/hp300/dev/grf_gb.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 $Hdr: grf_gb.c 1.16 91/04/02$
        !            39:  *
        !            40:  *     @(#)grf_gb.c    7.4 (Berkeley) 5/7/91
        !            41:  */
        !            42: 
        !            43: #include "grf.h"
        !            44: #if NGRF > 0
        !            45: 
        !            46: /*
        !            47:  * Graphics routines for the Gatorbox.
        !            48:  *
        !            49:  * Note: In the context of this system, "gator" and "gatorbox" both refer to
        !            50:  *       HP 987x0 graphics systems.  "Gator" is not used for high res mono.
        !            51:  *       (as in 9837 Gator systems)
        !            52:  */
        !            53: #include "sys/param.h"
        !            54: #include "sys/errno.h"
        !            55: 
        !            56: #include "grfioctl.h"
        !            57: #include "grfvar.h"
        !            58: #include "grf_gbreg.h"
        !            59: 
        !            60: #include "../include/cpu.h"
        !            61: 
        !            62: #define CRTC_DATA_LENGTH  0x0e
        !            63: u_char crtc_init_data[CRTC_DATA_LENGTH] = {
        !            64:     0x29, 0x20, 0x23, 0x04, 0x30, 0x0b, 0x30,
        !            65:     0x30, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00
        !            66: };
        !            67: 
        !            68: /*
        !            69:  * Initialize hardware.
        !            70:  * Must point g_display at a grfinfo structure describing the hardware.
        !            71:  * Returns 0 if hardware not present, non-zero ow.
        !            72:  */
        !            73: gb_init(gp, addr)
        !            74:        struct grf_softc *gp;
        !            75:        caddr_t addr;
        !            76: {
        !            77:        register struct gboxfb *gbp;
        !            78:        struct grfinfo *gi = &gp->g_display;
        !            79:        u_char *fbp, save;
        !            80:        int fboff;
        !            81:        extern caddr_t sctopa(), iomap();
        !            82: 
        !            83:        gbp = (struct gboxfb *) addr;
        !            84:        if (ISIIOVA(addr))
        !            85:                gi->gd_regaddr = (caddr_t) IIOP(addr);
        !            86:        else
        !            87:                gi->gd_regaddr = sctopa(vatosc(addr));
        !            88:        gi->gd_regsize = 0x10000;
        !            89:        gi->gd_fbwidth = 1024;          /* XXX */
        !            90:        gi->gd_fbheight = 1024;         /* XXX */
        !            91:        gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
        !            92:        fboff = (gbp->fbomsb << 8) | gbp->fbolsb;
        !            93:        gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16);
        !            94:        gp->g_regkva = addr;
        !            95:        gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize);
        !            96:        gi->gd_dwidth = 1024;           /* XXX */
        !            97:        gi->gd_dheight = 768;           /* XXX */
        !            98:        gi->gd_planes = 0;              /* how do we do this? */
        !            99:        /*
        !           100:         * The minimal register info here is from the Gatorbox X driver.
        !           101:         */
        !           102:        fbp = (u_char *) gp->g_fbkva;
        !           103:        gbp->write_protect = 0;
        !           104:        gbp->interrupt = 4;             /** fb_enable ? **/
        !           105:        gbp->rep_rule = 3;              /* GXcopy */
        !           106:        gbp->blink1 = 0xff;
        !           107:        gbp->blink2 = 0xff;
        !           108: 
        !           109:        gb_microcode(gbp);
        !           110: 
        !           111:        /*
        !           112:         * Find out how many colors are available by determining
        !           113:         * which planes are installed.  That is, write all ones to
        !           114:         * a frame buffer location, see how many ones are read back.
        !           115:         */
        !           116:        save = *fbp;
        !           117:        *fbp = 0xFF;
        !           118:        gi->gd_colors = *fbp + 1;
        !           119:        *fbp = save;
        !           120:        return(1);
        !           121: }
        !           122: 
        !           123: /*
        !           124:  * Program the 6845.
        !           125:  */
        !           126: gb_microcode(gbp)
        !           127:        register struct gboxfb *gbp;
        !           128: {
        !           129:        register int i;
        !           130:        
        !           131:        for (i = 0; i < CRTC_DATA_LENGTH; i++) {
        !           132:                gbp->crtc_address = i;
        !           133:                gbp->crtc_data = crtc_init_data[i];
        !           134:        }
        !           135: }
        !           136: 
        !           137: /*
        !           138:  * Change the mode of the display.
        !           139:  * Right now all we can do is grfon/grfoff.
        !           140:  * Return a UNIX error number or 0 for success.
        !           141:  */
        !           142: gb_mode(gp, cmd)
        !           143:        register struct grf_softc *gp;
        !           144: {
        !           145:        struct gboxfb *gbp;
        !           146:        int error = 0;
        !           147: 
        !           148:        gbp = (struct gboxfb *) gp->g_regkva;
        !           149:        switch (cmd) {
        !           150:        case GM_GRFON:
        !           151:                gbp->sec_interrupt = 1;
        !           152:                break;
        !           153:        case GM_GRFOFF:
        !           154:                break;
        !           155:        default:
        !           156:                error = EINVAL;
        !           157:                break;
        !           158:        }
        !           159:        return(error);
        !           160: }
        !           161: 
        !           162: #endif

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