NetBSD-5.0.2/sys/arch/x68k/dev/grf.c
/* $NetBSD: grf.c,v 1.36 2008/06/14 13:36:24 isaki Exp $ */
/*
* 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.
*
* 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. 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 $Hdr: grf.c 1.36 93/08/13$
*
* @(#)grf.c 8.4 (Berkeley) 1/12/94
*/
/*
* Copyright (c) 1988 University of Utah.
*
* 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 $Hdr: grf.c 1.36 93/08/13$
*
* @(#)grf.c 8.4 (Berkeley) 1/12/94
*/
/*
* Graphics display driver for the X68K machines.
* This is the hardware-independent portion of the driver.
* Hardware access is through the machine dependent grf switch routines.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: grf.c,v 1.36 2008/06/14 13:36:24 isaki Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/mman.h>
#include <sys/conf.h>
#include <machine/grfioctl.h>
#include <x68k/dev/grfvar.h>
#include <x68k/dev/itevar.h>
#include <machine/cpu.h>
#include <uvm/uvm_extern.h>
#include <uvm/uvm_map.h>
#include <miscfs/specfs/specdev.h>
#include "ite.h"
#if NITE == 0
#define iteon(u,f) 0
#define iteoff(u,f)
#define ite_reinit(u)
#endif
#ifdef DEBUG
int grfdebug = 0;
#define GDB_DEVNO 0x01
#define GDB_MMAP 0x02
#define GDB_IOMAP 0x04
#define GDB_LOCK 0x08
#endif
static int grfon(struct grf_softc *);
static int grfoff(struct grf_softc *);
static off_t grfaddr(struct grf_softc *, off_t);
static int grfmap(dev_t, void **, struct proc *);
static int grfunmap(dev_t, void *, struct proc *);
extern struct cfdriver grf_cd;
dev_type_open(grfopen);
dev_type_close(grfclose);
dev_type_ioctl(grfioctl);
dev_type_mmap(grfmmap);
const struct cdevsw grf_cdevsw = {
grfopen, grfclose, nullread, nullwrite, grfioctl,
nostop, notty, nopoll, grfmmap, nokqfilter,
};
/*ARGSUSED*/
int
grfopen(dev_t dev, int flags, int mode, struct lwp *l)
{
struct grf_softc *gp;
int error = 0;
gp = device_lookup_private(&grf_cd, GRFUNIT(dev));
if (gp == NULL)
return ENXIO;
if ((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(gp);
}
return error;
}
/*ARGSUSED*/
int
grfclose(dev_t dev, int flags, int mode, struct lwp *l)
{
struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev));
if ((gp->g_flags & GF_ALIVE) == 0)
return ENXIO;
(void) grfoff(gp);
gp->g_flags &= GF_ALIVE;
return 0;
}
/*ARGSUSED*/
int
grfioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
int unit = GRFUNIT(dev);
struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev));
int error;
if ((gp->g_flags & GF_ALIVE) == 0)
return ENXIO;
error = 0;
switch (cmd) {
case GRFIOCGINFO:
memcpy(data, (void *)&gp->g_display, sizeof(struct grfinfo));
break;
case GRFIOCON:
error = grfon(gp);
break;
case GRFIOCOFF:
error = grfoff(gp);
break;
case GRFIOCMAP:
error = grfmap(dev, (void **)data, l->l_proc);
break;
case GRFIOCUNMAP:
error = grfunmap(dev, *(void **)data, l->l_proc);
break;
case GRFSETVMODE:
error = (*gp->g_sw->gd_mode)(gp, GM_GRFSETVMODE, data);
if (error == 0)
ite_reinit(unit);
break;
default:
error = EINVAL;
break;
}
return error;
}
/*ARGSUSED*/
paddr_t
grfmmap(dev_t dev, off_t off, int prot)
{
return grfaddr(device_lookup_private(&grf_cd, GRFUNIT(dev)), off);
}
int
grfon(struct grf_softc *gp)
{
int unit = device_unit(&gp->g_device);
/*
* 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, 2);
return (*gp->g_sw->gd_mode)(gp, GM_GRFON, (void *) 0);
}
int
grfoff(struct grf_softc *gp)
{
int unit = device_unit(&gp->g_device);
int error;
#if 0 /* always fails in EINVAL... */
(void) grfunmap(dev, (void *) 0, curproc);
#endif
error = (*gp->g_sw->gd_mode)(gp, GM_GRFOFF, (void *) 0);
/* XXX: see comment for iteoff above */
iteon(unit, 2);
return error;
}
off_t
grfaddr(struct grf_softc *gp, off_t off)
{
struct grfinfo *gi = &gp->g_display;
/* control registers */
if (off >= 0 && off < gi->gd_regsize)
return ((u_int)gi->gd_regaddr + off) >> PGSHIFT;
/* frame buffer */
if (off >= gi->gd_regsize && off < gi->gd_regsize+gi->gd_fbsize) {
off -= gi->gd_regsize;
return ((u_int)gi->gd_fbaddr + off) >> PGSHIFT;
}
/* bogus */
return -1;
}
int
grfmap(dev_t dev, void **addrp, struct proc *p)
{
struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev));
int len, error;
struct vnode vn;
int flags;
#ifdef DEBUG
if (grfdebug & GDB_MMAP)
printf("grfmap(%d): addr %p\n", p->p_pid, *addrp);
#endif
len = gp->g_display.gd_regsize + gp->g_display.gd_fbsize;
flags = MAP_SHARED;
if (*addrp)
flags |= MAP_FIXED;
else
*addrp =
(void *)VM_DEFAULT_ADDRESS(p->p_vmspace->vm_daddr, len);
vn.v_type = VCHR; /* XXX */
vn.v_rdev = dev; /* XXX */
error = uvm_mmap(&p->p_vmspace->vm_map, (vaddr_t *)addrp,
(vsize_t)len, VM_PROT_ALL, VM_PROT_ALL,
flags, (void *)&vn, 0,
p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur);
if (error == 0)
(void) (*gp->g_sw->gd_mode)(gp, GM_MAP, *addrp);
return error;
}
int
grfunmap(dev_t dev, void *addr, struct proc *p)
{
struct grf_softc *gp = device_lookup_private(&grf_cd, GRFUNIT(dev));
vsize_t size;
#ifdef DEBUG
if (grfdebug & GDB_MMAP)
printf("grfunmap(%d): dev %x addr %p\n", p->p_pid, dev, addr);
#endif
if (addr == 0)
return EINVAL; /* XXX: how do we deal with this? */
(void) (*gp->g_sw->gd_mode)(gp, GM_UNMAP, 0);
size = round_page(gp->g_display.gd_regsize + gp->g_display.gd_fbsize);
uvm_unmap(&p->p_vmspace->vm_map, (vaddr_t)addr,
(vaddr_t)addr + size);
return 0;
}