NetBSD/sys/arch/hp300/dev/grf_gb.c

163 lines
4.7 KiB
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.
*
* 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