usr/src/sys/hp300/dev/grf_rb.c

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990, 1993
 *      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 $Hdr: grf_rb.c 1.15 93/08/13$
 *
 *      @(#)grf_rb.c    8.3 (Berkeley) %G%
 */

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

/*
 * Graphics routines for the Renaissance, HP98720 Graphics system.
 */
#include <sys/param.h>
#include <sys/errno.h>

#include <hp/dev/grfioctl.h>
#include <hp/dev/grfvar.h>
#include <hp300/dev/grf_rbreg.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.
 */
rb_init(gp, addr)
        struct grf_softc *gp;
        caddr_t addr;
{
        register struct rboxfb *rbp;
        struct grfinfo *gi = &gp->g_display;
        int fboff;
        extern caddr_t sctopa(), iomap();

        rbp = (struct rboxfb *) addr;
        if (ISIIOVA(addr))
                gi->gd_regaddr = (caddr_t) IIOP(addr);
        else
                gi->gd_regaddr = sctopa(vatosc(addr));
        gi->gd_regsize = 0x20000;
        gi->gd_fbwidth = (rbp->fbwmsb << 8) | rbp->fbwlsb;
        gi->gd_fbheight = (rbp->fbhmsb << 8) | rbp->fbhlsb;
        gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
        fboff = (rbp->fbomsb << 8) | rbp->fbolsb;
        gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16);
        if (gi->gd_regaddr >= (caddr_t)DIOIIBASE) {
                /*
                 * For DIO II space the fbaddr just computed is the offset
                 * from the select code base (regaddr) of the framebuffer.
                 * Hence it is also implicitly the size of the register set.
                 */
                gi->gd_regsize = (int) gi->gd_fbaddr;
                gi->gd_fbaddr += (int) gi->gd_regaddr;
                gp->g_regkva = addr;
                gp->g_fbkva = addr + gi->gd_regsize;
        } else {
                /*
                 * For DIO space we need to map the seperate framebuffer.
                 */
                gp->g_regkva = addr;
                gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize);
        }
        gi->gd_dwidth = (rbp->dwmsb << 8) | rbp->dwlsb;
        gi->gd_dheight = (rbp->dwmsb << 8) | rbp->dwlsb;
        gi->gd_planes = 0;      /* ?? */
        gi->gd_colors = 256;
        return(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.
 */
rb_mode(gp, cmd, data)
        register struct grf_softc *gp;
        caddr_t data;
{
        register struct rboxfb *rbp;
        int error = 0;

        rbp = (struct rboxfb *) gp->g_regkva;
        switch (cmd) {
        /*
         * The minimal register info here is from the Renaissance X driver.
         */
        case GM_GRFON:
        case GM_GRFOFF:
                break;

        case GM_GRFOVON:
                rbp->write_enable = 0;
                rbp->opwen = 0xF;
                rbp->drive = 0x10;
                break;

        case GM_GRFOVOFF:
                rbp->opwen = 0;
                rbp->write_enable = 0xffffffff;
                rbp->drive = 0x01;
                break;

        /*
         * Remember UVA of mapping for GCDESCRIBE.
         * XXX this should be per-process.
         */
        case GM_MAP:
                gp->g_data = data;
                break;

        case GM_UNMAP:
                gp->g_data = 0;
                break;

#ifdef HPUXCOMPAT
        case GM_DESCRIBE:
        {
                struct grf_fbinfo *fi = (struct grf_fbinfo *)data;
                struct grfinfo *gi = &gp->g_display;
                int i;

                /* feed it what HP-UX expects */
                fi->id = gi->gd_id;
                fi->mapsize = gi->gd_fbsize;
                fi->dwidth = gi->gd_dwidth;
                fi->dlength = gi->gd_dheight;
                fi->width = gi->gd_fbwidth;
                fi->length = gi->gd_fbheight;
                fi->bpp = NBBY;
                fi->xlen = (fi->width * fi->bpp) / NBBY;
                fi->npl = gi->gd_planes;
                fi->bppu = fi->npl;
                fi->nplbytes = fi->xlen * ((fi->length * fi->bpp) / NBBY);
                bcopy("HP98720", fi->name, 8);
                fi->attr = 2;   /* HW block mover */
                /*
                 * If mapped, return the UVA where mapped.
                 */
                if (gp->g_data) {
                        fi->regbase = gp->g_data;
                        fi->fbbase = fi->regbase + gp->g_display.gd_regsize;
                } else {
                        fi->fbbase = 0;
                        fi->regbase = 0;
                }
                for (i = 0; i < 6; i++)
                        fi->regions[i] = 0;
                break;
        }
#endif

        default:
                error = EINVAL;
                break;
        }
        return(error);
}

#endif