/* $NetBSD: cgthree.c,v 1.26 1996/03/31 22:30:56 pk Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * 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, Lawrence Berkeley Laboratory. * * 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. * * @(#)cgthree.c 8.2 (Berkeley) 10/30/93 */ /* * color display (cgthree) driver. * * Does not handle interrupts, even though they can occur. * * XXX should defer colormap updates to vertical retrace interrupts */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* per-display variables */ struct cgthree_softc { struct device sc_dev; /* base device */ struct sbusdev sc_sd; /* sbus device */ struct fbdevice sc_fb; /* frame buffer device */ struct rom_reg sc_phys; /* phys address description */ volatile struct fbcontrol *sc_fbc; /* Brooktree registers */ int sc_bustype; /* type of bus we live on */ union bt_cmap sc_cmap; /* Brooktree color map */ }; /* autoconfiguration driver */ static void cgthreeattach(struct device *, struct device *, void *); static int cgthreematch(struct device *, void *, void *); int cgthreeopen __P((dev_t, int, int, struct proc *)); int cgthreeclose __P((dev_t, int, int, struct proc *)); int cgthreeioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); int cgthreemmap __P((dev_t, int, int)); static void cgthreeunblank(struct device *); struct cfattach cgthree_ca = { sizeof(struct cgthree_softc), cgthreematch, cgthreeattach }; struct cfdriver cgthree_cd = { NULL, "cgthree", DV_DULL }; /* frame buffer generic driver */ static struct fbdriver cgthreefbdriver = { cgthreeunblank, cgthreeopen, cgthreeclose, cgthreeioctl, cgthreemmap }; extern int fbnode; extern struct tty *fbconstty; static void cgthreeloadcmap __P((struct cgthree_softc *, int, int)); static void cgthree_set_video __P((struct cgthree_softc *, int)); static int cgthree_get_video __P((struct cgthree_softc *)); /* * Match a cgthree. */ int cgthreematch(parent, vcf, aux) struct device *parent; void *vcf, *aux; { struct cfdata *cf = vcf; struct confargs *ca = aux; struct romaux *ra = &ca->ca_ra; /* * Mask out invalid flags from the user. */ cf->cf_flags &= FB_USERMASK; if (strcmp(cf->cf_driver->cd_name, ra->ra_name)) return (0); if (ca->ca_bustype == BUS_SBUS) return(1); ra->ra_len = NBPG; return (probeget(ra->ra_vaddr, 4) != -1); } /* * Attach a display. We need to notice if it is the console, too. */ void cgthreeattach(parent, self, args) struct device *parent, *self; void *args; { register struct cgthree_softc *sc = (struct cgthree_softc *)self; register struct confargs *ca = args; register int node = 0, ramsize, i; register volatile struct bt_regs *bt; int isconsole; int sbus = 1; char *nam = NULL; sc->sc_fb.fb_driver = &cgthreefbdriver; sc->sc_fb.fb_device = &sc->sc_dev; sc->sc_fb.fb_flags = sc->sc_dev.dv_cfdata->cf_flags; /* * The defaults below match my screen, but are not guaranteed * to be correct as defaults go... */ sc->sc_fb.fb_type.fb_type = FBTYPE_SUN3COLOR; switch (ca->ca_bustype) { case BUS_OBIO: if (CPU_ISSUN4M) { /* 4m has framebuffer on obio */ sbus = 0; node = ca->ca_ra.ra_node; nam = getpropstring(node, "model"); break; } case BUS_VME32: case BUS_VME16: sbus = node = 0; nam = "cgthree"; break; case BUS_SBUS: node = ca->ca_ra.ra_node; nam = getpropstring(node, "model"); break; } sc->sc_fb.fb_type.fb_depth = 8; fb_setsize(&sc->sc_fb, sc->sc_fb.fb_type.fb_depth, 1152, 900, node, ca->ca_bustype); ramsize = roundup(sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes, NBPG); sc->sc_fb.fb_type.fb_cmsize = 256; sc->sc_fb.fb_type.fb_size = ramsize; printf(": %s, %d x %d", nam, sc->sc_fb.fb_type.fb_width, sc->sc_fb.fb_type.fb_height); /* * When the ROM has mapped in a cgthree display, the address * maps only the video RAM, so in any case we have to map the * registers ourselves. We only need the video RAM if we are * going to print characters via rconsole. */ isconsole = node == fbnode && fbconstty != NULL; if ((sc->sc_fb.fb_pixels = ca->ca_ra.ra_vaddr) == NULL && isconsole) { /* this probably cannot happen, but what the heck */ sc->sc_fb.fb_pixels = mapiodev(ca->ca_ra.ra_reg, CG3REG_MEM, ramsize, ca->ca_bustype); } sc->sc_fbc = (volatile struct fbcontrol *) mapiodev(ca->ca_ra.ra_reg, CG3REG_REG, sizeof(struct fbcontrol), ca->ca_bustype); sc->sc_phys = ca->ca_ra.ra_reg[0]; sc->sc_bustype = ca->ca_bustype; /* grab initial (current) color map */ bt = &sc->sc_fbc->fbc_dac; bt->bt_addr = 0; for (i = 0; i < 256 * 3 / 4; i++) sc->sc_cmap.cm_chip[i] = bt->bt_cmap; /* make sure we are not blanked */ cgthree_set_video(sc, 1); BT_INIT(bt, 0); if (isconsole) { printf(" (console)\n"); #ifdef RASTERCONSOLE fbrcons_init(&sc->sc_fb); #endif } else printf("\n"); if (sbus) sbus_establish(&sc->sc_sd, &sc->sc_dev); if (node == fbnode) fb_attach(&sc->sc_fb, isconsole); } int cgthreeopen(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { int unit = minor(dev); if (unit >= cgthree_cd.cd_ndevs || cgthree_cd.cd_devs[unit] == NULL) return (ENXIO); return (0); } int cgthreeclose(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { return (0); } int cgthreeioctl(dev, cmd, data, flags, p) dev_t dev; u_long cmd; register caddr_t data; int flags; struct proc *p; { register struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; register struct fbgattr *fba; int error; switch (cmd) { case FBIOGTYPE: *(struct fbtype *)data = sc->sc_fb.fb_type; break; case FBIOGATTR: fba = (struct fbgattr *)data; fba->real_type = sc->sc_fb.fb_type.fb_type; fba->owner = 0; /* XXX ??? */ fba->fbtype = sc->sc_fb.fb_type; fba->sattr.flags = 0; fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type; fba->sattr.dev_specific[0] = -1; fba->emu_types[0] = sc->sc_fb.fb_type.fb_type; fba->emu_types[1] = -1; break; case FBIOGETCMAP: return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256)); case FBIOPUTCMAP: /* copy to software map */ #define p ((struct fbcmap *)data) error = bt_putcmap(p, &sc->sc_cmap, 256); if (error) return (error); /* now blast them into the chip */ /* XXX should use retrace interrupt */ cgthreeloadcmap(sc, p->index, p->count); #undef p break; case FBIOGVIDEO: *(int *)data = cgthree_get_video(sc); break; case FBIOSVIDEO: cgthree_set_video(sc, *(int *)data); break; default: return (ENOTTY); } return (0); } /* * Undo the effect of an FBIOSVIDEO that turns the video off. */ static void cgthreeunblank(dev) struct device *dev; { cgthree_set_video((struct cgthree_softc *)dev, 1); } static void cgthree_set_video(sc, enable) struct cgthree_softc *sc; int enable; { if (enable) sc->sc_fbc->fbc_ctrl |= FBC_VENAB; else sc->sc_fbc->fbc_ctrl &= ~FBC_VENAB; } static int cgthree_get_video(sc) struct cgthree_softc *sc; { return ((sc->sc_fbc->fbc_ctrl & FBC_VENAB) != 0); } /* * Load a subset of the current (new) colormap into the Brooktree DAC. */ static void cgthreeloadcmap(sc, start, ncolors) register struct cgthree_softc *sc; register int start, ncolors; { register volatile struct bt_regs *bt; register u_int *ip; register int count; ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */ count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3; bt = &sc->sc_fbc->fbc_dac; bt->bt_addr = BT_D4M4(start); while (--count >= 0) bt->bt_cmap = *ip++; } /* * Return the address that would map the given device at the given * offset, allowing for the given protection, or return -1 for error. * * The cg3 is mapped starting at 256KB, for pseudo-compatibility with * the cg4 (which had an overlay plane in the first 128K and an enable * plane in the next 128K). X11 uses only 256k+ region but tries to * map the whole thing, so we repeatedly map the first 256K to the * first page of the color screen. If someone tries to use the overlay * and enable regions, they will get a surprise.... * * As well, mapping at an offset of 0x04000000 causes the cg3 to be * mapped in flat mode without the cg4 emulation. */ int cgthreemmap(dev, off, prot) dev_t dev; int off, prot; { register struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; #define START (128*1024 + 128*1024) #define NOOVERLAY (0x04000000) if (off & PGOFSET) panic("cgthreemmap"); if ((u_int)off >= NOOVERLAY) off -= NOOVERLAY; else if ((u_int)off >= START) off -= START; else off = 0; if ((unsigned)off >= sc->sc_fb.fb_type.fb_size) return (-1); /* * I turned on PMAP_NC here to disable the cache as I was * getting horribly broken behaviour with it on. */ return (REG2PHYS(&sc->sc_phys, CG3REG_MEM+off, sc->sc_bustype) | PMAP_NC); }