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Annotation of 43BSDReno/sys/hpdev/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 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 $Hdr: grf_gb.c 1.13 89/04/11$
        !            26:  *
        !            27:  *     @(#)grf_gb.c    7.1 (Berkeley) 5/8/90
        !            28:  */
        !            29: 
        !            30: #include "grf.h"
        !            31: #if NGRF > 0
        !            32: 
        !            33: /*
        !            34:  * Graphics routines for the Gatorbox.
        !            35:  *
        !            36:  * Note: In the context of this system, "gator" and "gatorbox" both refer to
        !            37:  *       HP 987x0 graphics systems.  "Gator" is not used for high res mono.
        !            38:  *       (as in 9837 Gator systems)
        !            39:  */
        !            40: #include "param.h"
        !            41: #include "errno.h"
        !            42: 
        !            43: #include "grfioctl.h"
        !            44: #include "grfvar.h"
        !            45: #include "grf_gbreg.h"
        !            46: 
        !            47: #include "machine/cpu.h"
        !            48: 
        !            49: #define CRTC_DATA_LENGTH  0x0e
        !            50: u_char crtc_init_data[CRTC_DATA_LENGTH] = {
        !            51:     0x29, 0x20, 0x23, 0x04, 0x30, 0x0b, 0x30,
        !            52:     0x30, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00
        !            53: };
        !            54: 
        !            55: /*
        !            56:  * Initialize hardware.
        !            57:  * Must point g_display at a grfinfo structure describing the hardware.
        !            58:  * Returns 0 if hardware not present, non-zero ow.
        !            59:  */
        !            60: gb_init(gp, addr)
        !            61:        struct grf_softc *gp;
        !            62:        u_char *addr;
        !            63: {
        !            64:        register struct gboxfb *gbp;
        !            65:        struct grfinfo *gi = &gp->g_display;
        !            66:        u_char *fbp, save;
        !            67:        int fboff;
        !            68: 
        !            69:        gbp = (struct gboxfb *) addr;
        !            70:        gi->gd_regaddr = (caddr_t) UNIOV(addr);
        !            71:        gi->gd_regsize = 0x10000;
        !            72:        gi->gd_fbwidth = 1024;          /* XXX */
        !            73:        gi->gd_fbheight = 1024;         /* XXX */
        !            74:        fboff = (gbp->fbomsb << 8) | gbp->fbolsb;
        !            75:        gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16);
        !            76:        gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
        !            77:        gi->gd_dwidth = 1024;           /* XXX */
        !            78:        gi->gd_dheight = 768;           /* XXX */
        !            79:        gi->gd_planes = 0;              /* how do we do this? */
        !            80:        /*
        !            81:         * The minimal register info here is from the Gatorbox X driver.
        !            82:         */
        !            83:        fbp = (u_char *) IOV(gi->gd_fbaddr);
        !            84:        gbp->write_protect = 0;
        !            85:        gbp->interrupt = 4;             /** fb_enable ? **/
        !            86:        gbp->rep_rule = 3;              /* GXcopy */
        !            87:        gbp->blink1 = 0xff;
        !            88:        gbp->blink2 = 0xff;
        !            89: 
        !            90:        gb_microcode(gbp);
        !            91: 
        !            92:        /*
        !            93:         * Find out how many colors are available by determining
        !            94:         * which planes are installed.  That is, write all ones to
        !            95:         * a frame buffer location, see how many ones are read back.
        !            96:         */
        !            97:        save = *fbp;
        !            98:        *fbp = 0xFF;
        !            99:        gi->gd_colors = *fbp + 1;
        !           100:        *fbp = save;
        !           101:        return(1);
        !           102: }
        !           103: 
        !           104: /*
        !           105:  * Program the 6845.
        !           106:  */
        !           107: gb_microcode(gbp)
        !           108:        register struct gboxfb *gbp;
        !           109: {
        !           110:        register int i;
        !           111:        
        !           112:        for (i = 0; i < CRTC_DATA_LENGTH; i++) {
        !           113:                gbp->crtc_address = i;
        !           114:                gbp->crtc_data = crtc_init_data[i];
        !           115:        }
        !           116: }
        !           117: 
        !           118: /*
        !           119:  * Change the mode of the display.
        !           120:  * Right now all we can do is grfon/grfoff.
        !           121:  * Return a UNIX error number or 0 for success.
        !           122:  */
        !           123: gb_mode(gp, cmd)
        !           124:        register struct grf_softc *gp;
        !           125: {
        !           126:        struct gboxfb *gbp;
        !           127:        int error = 0;
        !           128: 
        !           129:        gbp = (struct gboxfb *) IOV(gp->g_display.gd_regaddr);
        !           130:        switch (cmd) {
        !           131:        case GM_GRFON:
        !           132:                gbp->sec_interrupt = 1;
        !           133:                break;
        !           134:        case GM_GRFOFF:
        !           135:                break;
        !           136:        default:
        !           137:                error = EINVAL;
        !           138:                break;
        !           139:        }
        !           140:        return(error);
        !           141: }
        !           142: 
        !           143: #endif

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