NetBSD/sys/arch/mac68k/dev/grf.c

362 lines
7.9 KiB
C

/* $NetBSD: grf.c,v 1.32 1996/05/06 01:08:24 briggs Exp $ */
/*
* 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 $Hdr: grf.c 1.31 91/01/21$
*
* @(#)grf.c 7.8 (Berkeley) 5/7/91
*/
/*
* Graphics display driver for the Macintosh.
* This is the hardware-independent portion of the driver.
* Hardware access is through the grfdev routines below.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/mman.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/systm.h>
#include <machine/grfioctl.h>
#include <machine/cpu.h>
#include <miscfs/specfs/specdev.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include "nubus.h"
#include "itevar.h"
#include "grfvar.h"
#include "grf.h"
#include "ite.h"
#if NITE == 0
#define iteon(u,f)
#define iteoff(u,f)
#endif
struct cfdriver grf_cd = {
NULL, "grf", DV_DULL
};
#ifdef DEBUG
static int grfdebug = 0xff;
#define GDB_DEVNO 0x01
#define GDB_MMAP 0x02
#define GDB_IOMAP 0x04
#define GDB_LOCK 0x08
#endif
/*ARGSUSED*/
int
grfopen(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
register struct grf_softc *gp;
int unit;
int error;
unit = GRFUNIT(dev);
gp = grf_cd.cd_devs[unit];
if (unit >= grf_cd.cd_ndevs || (gp->g_flags & GF_ALIVE) == 0)
return (ENXIO);
if ((gp->g_flags & (GF_OPEN | GF_EXCLUDE)) == (GF_OPEN | GF_EXCLUDE))
return (EBUSY);
/*
* First open.
* XXX: always put in graphics mode.
*/
error = 0;
if ((gp->g_flags & GF_OPEN) == 0) {
gp->g_flags |= GF_OPEN;
error = grfon(dev);
}
return (error);
}
/*ARGSUSED*/
int
grfclose(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
register struct grf_softc *gp;
gp = grf_cd.cd_devs[GRFUNIT(dev)];
(void) grfoff(dev);
gp->g_flags &= GF_ALIVE;
return (0);
}
/*ARGSUSED*/
int
grfioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
register struct grf_softc *gp;
int error;
int unit = GRFUNIT(dev);
gp = grf_cd.cd_devs[unit];
error = 0;
switch (cmd) {
case GRFIOCGINFO: /* XXX - This should go away as soon as X and */
/* dt are fixed to use GRFIOC*MODE* */
{ struct grfinfo *g;
g = (struct grfinfo *) data;
bzero(data, sizeof(struct grfinfo));
g->gd_id = gp->curr_mode.mode_id;
g->gd_fbaddr = gp->curr_mode.fbbase;
g->gd_fbsize = gp->curr_mode.fbsize;
g->gd_colors = 1 << (u_int32_t) gp->curr_mode.psize;
g->gd_planes = gp->curr_mode.psize;
g->gd_fbwidth = g->gd_dwidth = gp->curr_mode.width;
g->gd_fbheight = g->gd_dheight = gp->curr_mode.height;
g->gd_fbrowbytes = gp->curr_mode.rowbytes;
}
break;
case GRFIOCON:
error = grfon(dev);
break;
case GRFIOCOFF:
error = grfoff(dev);
break;
case GRFIOCMAP:
error = grfmap(dev, (caddr_t *) data, p);
break;
case GRFIOCUNMAP:
error = grfunmap(dev, *(caddr_t *) data, p);
break;
case GRFIOCGMODE:
bcopy(&gp->curr_mode, data, sizeof(struct grfmode));
break;
case GRFIOCGETMODE:
error = (*gp->g_mode)(gp, GM_CURRMODE, data);
break;
case GRFIOCSETMODE:
error = (*gp->g_mode)(gp, GM_NEWMODE, data);
break;
case GRFIOCLISTMODES:
error = (*gp->g_mode)(gp, GM_LISTMODES, data);
break;
default:
error = EINVAL;
break;
}
return (error);
}
/*ARGSUSED*/
int
grfselect(dev, rw, p)
dev_t dev;
int rw;
struct proc *p;
{
if (rw == FREAD)
return (0);
return (1);
}
/*ARGSUSED*/
int
grfmmap(dev, off, prot)
dev_t dev;
int off;
int prot;
{
int unit = GRFUNIT(dev);
struct grf_softc *gp;
gp = grf_cd.cd_devs[unit];
return (grfaddr(gp, off));
}
int
grfon(dev)
dev_t dev;
{
int unit = GRFUNIT(dev);
struct grf_softc *gp;
gp = grf_cd.cd_devs[unit];
/*
* XXX: iteoff call relies on devices being in same order
* as ITEs and the fact that iteoff only uses the minor part
* of the dev arg.
*/
iteoff(unit, 3);
return (*gp->g_mode) (gp, GM_GRFON, NULL);
}
int
grfoff(dev)
dev_t dev;
{
int unit = GRFUNIT(dev);
struct grf_softc *gp;
int error;
gp = grf_cd.cd_devs[unit];
(void) grfunmap(dev, (caddr_t) 0, curproc);
error = (*gp->g_mode) (gp, GM_GRFOFF, NULL);
/* XXX: see comment for iteoff above */
iteon(unit, 2);
return (error);
}
int
grfaddr(gp, off)
struct grf_softc *gp;
register int off;
{
register struct grfmode *gm = &gp->curr_mode;
u_long addr;
if (off < mac68k_round_page(gm->fbsize + gm->fboff) ) {
addr = (u_long) (*gp->g_phys)(gp, (int) gm->fbbase) + off;
return mac68k_btop(addr);
}
/* bogus */
return (-1);
}
int
grfmap(dev, addrp, p)
dev_t dev;
caddr_t *addrp;
struct proc *p;
{
struct grf_softc *gp;
struct specinfo si;
struct vnode vn;
int len, error;
int flags;
gp = grf_cd.cd_devs[GRFUNIT(dev)];
#ifdef DEBUG
if (grfdebug & GDB_MMAP)
printf("grfmap(%d): addr %x\n", p->p_pid, *addrp);
#endif
len = mac68k_round_page(gp->curr_mode.fbsize + gp->curr_mode.fboff);
flags = MAP_SHARED | MAP_FIXED;
*addrp = (caddr_t) mac68k_trunc_page(
NUBUS_SLOT_TO_PADDR(gp->sc_slot.slot));
vn.v_type = VCHR; /* XXX */
vn.v_specinfo = &si; /* XXX */
vn.v_rdev = dev; /* XXX */
error = vm_mmap(&p->p_vmspace->vm_map, (vm_offset_t *) addrp,
(vm_size_t) len, VM_PROT_ALL, VM_PROT_ALL, flags, (caddr_t) & vn,
0);
/* Offset into page: */
*addrp += (unsigned long) gp->curr_mode.fboff & 0xfff;
#ifdef DEBUG
if (grfdebug & GDB_MMAP)
printf("grfmap(%d): returning addr %x\n", p->p_pid, *addrp);
#endif
return (error);
}
int
grfunmap(dev, addr, p)
dev_t dev;
caddr_t addr;
struct proc *p;
{
struct grf_softc *gp;
vm_size_t size;
int rv;
gp = grf_cd.cd_devs[GRFUNIT(dev)];
#ifdef DEBUG
if (grfdebug & GDB_MMAP)
printf("grfunmap(%d): dev %x addr %x\n", p->p_pid, dev, addr);
#endif
if (addr == 0)
return (EINVAL);/* XXX: how do we deal with this? */
size = round_page(gp->curr_mode.fbsize);
rv = vm_deallocate(&p->p_vmspace->vm_map, (vm_offset_t) addr, size);
return (rv == KERN_SUCCESS ? 0 : EINVAL);
}