163 lines
4.7 KiB
C
163 lines
4.7 KiB
C
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: grf_gb.c 1.16 91/04/02$
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*
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* @(#)grf_gb.c 7.4 (Berkeley) 5/7/91
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*/
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#include "grf.h"
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#if NGRF > 0
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/*
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* Graphics routines for the Gatorbox.
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*
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* Note: In the context of this system, "gator" and "gatorbox" both refer to
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* HP 987x0 graphics systems. "Gator" is not used for high res mono.
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* (as in 9837 Gator systems)
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*/
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#include "sys/param.h"
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#include "sys/errno.h"
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#include "grfioctl.h"
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#include "grfvar.h"
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#include "grf_gbreg.h"
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#include "../include/cpu.h"
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#define CRTC_DATA_LENGTH 0x0e
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u_char crtc_init_data[CRTC_DATA_LENGTH] = {
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0x29, 0x20, 0x23, 0x04, 0x30, 0x0b, 0x30,
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0x30, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00
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};
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/*
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* Initialize hardware.
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* Must point g_display at a grfinfo structure describing the hardware.
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* Returns 0 if hardware not present, non-zero ow.
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*/
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gb_init(gp, addr)
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struct grf_softc *gp;
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caddr_t addr;
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{
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register struct gboxfb *gbp;
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struct grfinfo *gi = &gp->g_display;
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u_char *fbp, save;
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int fboff;
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extern caddr_t sctopa(), iomap();
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gbp = (struct gboxfb *) addr;
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if (ISIIOVA(addr))
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gi->gd_regaddr = (caddr_t) IIOP(addr);
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else
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gi->gd_regaddr = sctopa(vatosc(addr));
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gi->gd_regsize = 0x10000;
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gi->gd_fbwidth = 1024; /* XXX */
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gi->gd_fbheight = 1024; /* XXX */
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gi->gd_fbsize = gi->gd_fbwidth * gi->gd_fbheight;
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fboff = (gbp->fbomsb << 8) | gbp->fbolsb;
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gi->gd_fbaddr = (caddr_t) (*((u_char *)addr + fboff) << 16);
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gp->g_regkva = addr;
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gp->g_fbkva = iomap(gi->gd_fbaddr, gi->gd_fbsize);
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gi->gd_dwidth = 1024; /* XXX */
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gi->gd_dheight = 768; /* XXX */
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gi->gd_planes = 0; /* how do we do this? */
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/*
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* The minimal register info here is from the Gatorbox X driver.
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*/
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fbp = (u_char *) gp->g_fbkva;
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gbp->write_protect = 0;
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gbp->interrupt = 4; /** fb_enable ? **/
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gbp->rep_rule = 3; /* GXcopy */
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gbp->blink1 = 0xff;
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gbp->blink2 = 0xff;
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gb_microcode(gbp);
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/*
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* Find out how many colors are available by determining
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* which planes are installed. That is, write all ones to
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* a frame buffer location, see how many ones are read back.
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*/
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save = *fbp;
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*fbp = 0xFF;
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gi->gd_colors = *fbp + 1;
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*fbp = save;
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return(1);
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}
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/*
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* Program the 6845.
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*/
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gb_microcode(gbp)
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register struct gboxfb *gbp;
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{
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register int i;
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for (i = 0; i < CRTC_DATA_LENGTH; i++) {
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gbp->crtc_address = i;
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gbp->crtc_data = crtc_init_data[i];
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}
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}
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/*
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* Change the mode of the display.
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* Right now all we can do is grfon/grfoff.
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* Return a UNIX error number or 0 for success.
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*/
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gb_mode(gp, cmd)
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register struct grf_softc *gp;
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{
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struct gboxfb *gbp;
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int error = 0;
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gbp = (struct gboxfb *) gp->g_regkva;
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switch (cmd) {
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case GM_GRFON:
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gbp->sec_interrupt = 1;
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break;
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case GM_GRFOFF:
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break;
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default:
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error = EINVAL;
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break;
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}
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return(error);
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}
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#endif
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