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