/* * 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. * * %W% (Berkeley) %G% * * from: Header: cgthree.c,v 1.8 93/10/31 05:09:24 torek Exp * $Id: cgthree.c,v 1.3 1993/11/11 03:36:55 deraadt Exp $ */ /* * 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 /* 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 */ volatile struct bt_regs *sc_bt; /* Brooktree registers */ caddr_t sc_phys; /* display RAM (phys addr) */ int sc_blanked; /* true if blanked */ union bt_cmap sc_cmap; /* Brooktree color map */ }; /* autoconfiguration driver */ static void cgthreeattach(struct device *, struct device *, void *); struct cfdriver cgthreecd = { NULL, "cgthree", matchbyname, cgthreeattach, DV_DULL, sizeof(struct cgthree_softc) }; /* frame buffer generic driver */ static void cgthreeunblank(struct device *); static struct fbdriver cgthreefbdriver = { cgthreeunblank }; extern int fbnode; extern struct tty *fbconstty; extern int (*v_putc)(); extern int nullop(); static int cgthree_cnputc(); static void cgthreeloadcmap __P((struct cgthree_softc *, int, int)); #define CGTHREE_MAJOR 55 /* XXX */ /* * 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 sbus_attach_args *sa = args; register int node = sa->sa_ra.ra_node, ramsize, i; register volatile struct bt_regs *bt; register struct cgthree_all *p; int isconsole; sc->sc_fb.fb_major = CGTHREE_MAJOR; /* XXX to be removed */ sc->sc_fb.fb_driver = &cgthreefbdriver; sc->sc_fb.fb_device = &sc->sc_dev; /* * 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; sc->sc_fb.fb_type.fb_width = getpropint(node, "width", 1152); sc->sc_fb.fb_type.fb_height = getpropint(node, "height", 900); sc->sc_fb.fb_linebytes = getpropint(node, "linebytes", 1152); ramsize = sc->sc_fb.fb_type.fb_height * sc->sc_fb.fb_linebytes; sc->sc_fb.fb_type.fb_depth = 8; sc->sc_fb.fb_type.fb_cmsize = 256; sc->sc_fb.fb_type.fb_size = ramsize; printf(": %s, %d x %d", getpropstring(node, "model"), 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; p = (struct cgthree_all *)sa->sa_ra.ra_paddr; if ((sc->sc_fb.fb_pixels = sa->sa_ra.ra_vaddr) == NULL && isconsole) { /* this probably cannot happen, but what the heck */ sc->sc_fb.fb_pixels = mapiodev(p->ba_ram, ramsize); } sc->sc_bt = bt = (volatile struct bt_regs *) mapiodev((caddr_t)&p->ba_btreg, sizeof(p->ba_btreg)); sc->sc_phys = p->ba_ram; /* grab initial (current) color map */ 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 (see cgthreeunblank) */ bt->bt_addr = 0x06; /* command reg */ bt->bt_ctrl = 0x73; /* overlay plane */ bt->bt_addr = 0x04; /* read mask */ bt->bt_ctrl = 0xff; /* color planes */ if (isconsole) { printf(" (console)\n"); #ifdef RCONSOLE rcons_init(&sc->sc_fb); #endif } else printf("\n"); sbus_establish(&sc->sc_sd, &sc->sc_dev); if (node == fbnode) fb_attach(&sc->sc_fb); } int cgthreeopen(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { int unit = minor(dev); if (unit >= cgthreecd.cd_ndevs || cgthreecd.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; int cmd; register caddr_t data; int flags; struct proc *p; { register struct cgthree_softc *sc = cgthreecd.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 = sc->sc_blanked; break; case FBIOSVIDEO: if (*(int *)data) cgthreeunblank(&sc->sc_dev); else if (!sc->sc_blanked) { register volatile struct bt_regs *bt; bt = sc->sc_bt; bt->bt_addr = 0x06; /* command reg */ bt->bt_ctrl = 0x70; /* overlay plane */ bt->bt_addr = 0x04; /* read mask */ bt->bt_ctrl = 0x00; /* color planes */ /* * Set color 0 to black -- note that this overwrites * R of color 1. */ bt->bt_addr = 0; bt->bt_cmap = 0; sc->sc_blanked = 1; } break; default: return (ENOTTY); } return (0); } /* * Undo the effect of an FBIOSVIDEO that turns the video off. */ static void cgthreeunblank(dev) struct device *dev; { struct cgthree_softc *sc = (struct cgthree_softc *)dev; register volatile struct bt_regs *bt; if (sc->sc_blanked) { sc->sc_blanked = 0; bt = sc->sc_bt; /* restore color 0 (and R of color 1) */ bt->bt_addr = 0; bt->bt_cmap = sc->sc_cmap.cm_chip[0]; /* restore read mask */ bt->bt_addr = 0x06; /* command reg */ bt->bt_ctrl = 0x73; /* overlay plane */ bt->bt_addr = 0x04; /* read mask */ bt->bt_ctrl = 0xff; /* color planes */ } } /* * 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_bt; 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.... */ int cgthreemap(dev, off, prot) dev_t dev; int off, prot; { register struct cgthree_softc *sc = cgthreecd.cd_devs[minor(dev)]; #define START (128*1024 + 128*1024) if (off & PGOFSET) panic("cgthreemap"); if ((unsigned)off < START) off = 0; else off -= START; 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 ((int)sc->sc_phys + off + PMAP_OBIO + PMAP_NC); }