/* $OpenBSD: grf.c,v 1.29 2005/09/15 18:52:44 martin Exp $ */ /* $NetBSD: grf.c,v 1.53 1998/06/02 02:14:20 scottr 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. 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "grf.h" #include "ite.h" #if NITE == 0 #define iteon(u,f) #define iteoff(u,f) #endif int grfmatch(struct device *, void *, void *); void grfattach(struct device *, struct device *, void *); struct cfdriver grf_cd = { NULL, "grf", DV_DULL }; struct cfattach grf_ca = { sizeof(struct grf_softc), grfmatch, grfattach }; #ifdef DEBUG #define GRF_DEBUG #endif #ifdef GRF_DEBUG #define GDB_DEVNO 0x01 #define GDB_MMAP 0x02 #define GDB_IOMAP 0x04 #define GDB_LOCK 0x08 int grfdebug = 0; #endif int grfmatch(parent, vcf, aux) struct device *parent; void *vcf; void *aux; { struct grfbus_attach_args *ga = aux; return (strcmp(ga->ga_name, "grf") == 0); } void grfattach(parent, self, aux) struct device *parent, *self; void *aux; { struct grf_softc *sc = (struct grf_softc *)self; struct grfbus_attach_args *ga = aux; printf("\n"); /* Load forwarded pointers. */ sc->sc_grfmode = ga->ga_grfmode; sc->sc_slot = ga->ga_slot; sc->sc_tag = ga->ga_tag; sc->sc_regh = ga->ga_handle; sc->sc_mode = ga->ga_mode; sc->sc_phys = ga->ga_phys; sc->sc_flags = GF_ALIVE; /* XXX bogus */ /* * Attach ite semantics to the grf. Change the name, forward * everything else. */ ga->ga_name = "ite"; (void)config_found(self, ga, grfbusprint); } /*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->sc_flags & GF_ALIVE) == 0) return (ENXIO); if ((gp->sc_flags & (GF_OPEN | GF_EXCLUDE)) == (GF_OPEN | GF_EXCLUDE)) return (EBUSY); /* * First open. * XXX: always put in graphics mode. */ error = 0; if ((gp->sc_flags & GF_OPEN) == 0) { gp->sc_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->sc_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; { struct grf_softc *gp; struct grfmode *gm; int error; int unit = GRFUNIT(dev); gp = grf_cd.cd_devs[unit]; gm = gp->sc_grfmode; error = 0; switch (cmd) { case GRFIOCON: error = grfon(dev); break; case GRFIOCOFF: error = grfoff(dev); break; case GRFIOCGMODE: bcopy(gm, data, sizeof(struct grfmode)); break; case GRFIOCGETMODE: error = (*gp->sc_mode)(gp, GM_CURRMODE, data); break; case GRFIOCSETMODE: error = (*gp->sc_mode)(gp, GM_NEWMODE, data); break; case GRFIOCLISTMODES: error = (*gp->sc_mode)(gp, GM_LISTMODES, data); break; default: error = EINVAL; break; } return (error); } /*ARGSUSED*/ int grfpoll(dev, events, p) dev_t dev; int events; struct proc *p; { /* always fails => never blocks */ return (events & (POLLOUT | POLLWRNORM)); } /*ARGSUSED*/ paddr_t grfmmap(dev, off, prot) dev_t dev; off_t off; int prot; { struct grf_softc *gp = grf_cd.cd_devs[GRFUNIT(dev)]; struct grfmode *gm = gp->sc_grfmode; u_long addr; #ifdef GRF_DEBUG if (grfdebug & GDB_MMAP) printf("grfmmap(%x): off %x, prot %x\n", dev, off, prot); #endif if (off < trunc_page(gm->fboff) || off >= round_page(gm->fbsize + gm->fboff)) addr = (-1); /* XXX bogus */ else addr = m68k_btop(gp->sc_phys + off); #ifdef GRF_DEBUG if (grfdebug & GDB_MMAP) printf("grfmmap(%x): returning addr 0x%08lx\n", dev, addr); #endif return (int)addr; } 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->sc_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]; error = (*gp->sc_mode)(gp, GM_GRFOFF, NULL); /* XXX: see comment for iteoff above */ iteon(unit, 2); return (error); }