cleanup

[unix-history] / usr / src / sys / hp300 / dev / grf_dv.c

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* %sccs.include.redist.c%
*
* from: Utah $Hdr: grf_dv.c 1.6 89/04/11$
*
*      @(#)grf_dv.c    7.1 (Berkeley) %G%
*/

#include "grf.h"
#if NGRF > 0

/*
* Graphics routines for the DaVinci, HP98730/98731 Graphics system.
*/
#include "param.h"
#include "errno.h"

#include "grfioctl.h"
#include "grfvar.h"
#include "grf_dvreg.h"

#include "machine/cpu.h"

/*
* Initialize hardware.
* Must point g_display at a grfinfo structure describing the hardware.
* Returns 0 if hardware not present, non-zero ow.
*/
dv_init(gp, addr)
       struct grf_softc *gp;
       u_char *addr;
{
       register struct dvboxfb *dbp;
       struct grfinfo *gi = &gp->g_display;
       int fboff;

       dbp = (struct dvboxfb *) addr;
       gi->gd_regaddr = (caddr_t) UNIOV(addr);
       gi->gd_regsize = 0x20000;
       gi->gd_fbwidth = (dbp->fbwmsb << 8) | dbp->fbwlsb;
       gi->gd_fbheight = (dbp->fbhmsb << 8) | dbp->fbhlsb;
       fboff = (dbp->fbomsb << 8) | dbp->fbolsb;
       gi->gd_fbaddr = (caddr_t) (*(addr + fboff) << 16);
       gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
       gi->gd_dwidth = (dbp->dwmsb << 8) | dbp->dwlsb;
       gi->gd_dheight = (dbp->dwmsb << 8) | dbp->dwlsb;
       gi->gd_planes = 0;      /* ?? */
       gi->gd_colors = 256;

       dv_reset(dbp);
       return(1);
}

/*
*  Magic code herein.
*/
dv_reset(dbp)
       register struct dvboxfb *dbp;
{
       dbp->reset = 0x80;
       DELAY(100);

       dbp->interrupt = 0x04;
       dbp->en_scan   = 0x01;
       dbp->fbwen     = ~0;
       dbp->opwen     = ~0;
       dbp->fold      = 0x01;
       dbp->drive     = 0x01;
       dbp->rep_rule  = 0x33;
       dbp->alt_rr    = 0x33;
       dbp->zrr       = 0x33;

       dbp->fbvenp    = 0xFF;
       dbp->dispen    = 0x01;
       dbp->fbvens    = 0x0;
       dbp->fv_trig   = 0x01;
       DELAY(100);
       dbp->vdrive    = 0x0;
       dbp->zconfig   = 0x0;

       while (dbp->wbusy & 0x01)
         DELAY(100);

       dbp->cmapbank = 0;

       dbp->red0   = 0;
       dbp->red1   = 0;
       dbp->green0 = 0;
       dbp->green1 = 0;
       dbp->blue0  = 0;
       dbp->blue1  = 0;

       dbp->panxh   = 0;
       dbp->panxl   = 0;
       dbp->panyh   = 0;
       dbp->panyl   = 0;
       dbp->zoom    = 0;
       dbp->cdwidth = 0x50;
       dbp->chstart = 0x52;
       dbp->cvwidth = 0x22;
       dbp->pz_trig = 1;
}

/*
* Change the mode of the display.
* Right now all we can do is grfon/grfoff.
* Return a UNIX error number or 0 for success.
*/
dv_mode(gp, cmd)
       register struct grf_softc *gp;
{
       register struct dvboxfb *dbp;
       int error = 0;

       dbp = (struct dvboxfb *) IOV(gp->g_display.gd_regaddr);
       switch (cmd) {
       case GM_GRFON:
               dbp->dispen = 0x01;
               break;
       case GM_GRFOFF:
               break;
       case GM_GRFOVON:
               dbp->opwen = 0xF;
               dbp->drive = 0x10;
               break;
       case GM_GRFOVOFF:
               dbp->opwen = 0;
               dbp->drive = 0x01;
               break;
       default:
               error = EINVAL;
               break;
       }
       return(error);
}

#endif