/* $NetBSD: cg4.c,v 1.1 1995/03/10 01:51:03 gwr 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. * * from: @(#)cgthree.c 8.2 (Berkeley) 10/30/93 */ /* * color display (cg4) 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 "fbvar.h" #include "btreg.h" #include "btvar.h" #include "cg4reg.h" /* per-display variables */ struct cg4_softc { struct device sc_dev; /* base device */ struct fbdevice sc_fb; /* frame buffer device */ volatile struct bt_regs *sc_bt; /* Brooktree registers */ int sc_phys; /* display RAM (phys addr) */ int sc_blanked; /* true if blanked */ union bt_cmap sc_cmap; /* Brooktree color map */ }; /* autoconfiguration driver */ static void cg4attach __P((struct device *, struct device *, void *)); static int cg4match __P((struct device *, void *, void *)); struct cfdriver cgfourcd = { NULL, "cgfour", cg4match, cg4attach, DV_DULL, sizeof(struct cg4_softc) }; /* frame buffer generic driver */ int cg4open(), cg4close(), cg4map(); static int cg4gattr __P((struct fbdevice *, struct fbgattr *)); static int cg4gvideo __P((struct fbdevice *, int *)); static int cg4svideo __P((struct fbdevice *, int *)); static int cg4getcmap __P((struct fbdevice *, struct fbcmap *)); static int cg4putcmap __P((struct fbdevice *, struct fbcmap *)); static struct fbdriver cg4fbdriver = { cg4open, cg4close, cg4map, cg4gattr, cg4gvideo, cg4svideo, cg4getcmap, cg4putcmap }; static void cg4loadcmap __P((struct cg4_softc *, int, int)); /* * Match a cg4. */ static int cg4match(parent, vcf, args) struct device *parent; void *vcf, *args; { struct confargs *ca = args; int x; if (ca->ca_paddr == -1) ca->ca_paddr = 0xFF200000; /* The peek returns -1 on bus error. */ x = bus_peek(ca->ca_bustype, ca->ca_paddr, 1); return (x != -1); } /* * Attach a display. We need to notice if it is the console, too. */ static void cg4attach(parent, self, args) struct device *parent, *self; void *args; { struct cg4_softc *sc = (struct cg4_softc *)self; struct fbdevice *fb = &sc->sc_fb; struct confargs *ca = args; struct fbtype *fbt; volatile struct bt_regs *bt; int i, ramsize, pa; fb->fb_driver = &cg4fbdriver; fb->fb_private = sc; fb->fb_name = sc->sc_dev.dv_xname; fbt = &fb->fb_fbtype; fbt->fb_type = FBTYPE_SUN4COLOR; fbt->fb_depth = 8; fbt->fb_cmsize = 256; fbt->fb_width = 1152; fbt->fb_height = 900; fbt->fb_size = CG4_FBSIZE; sc->sc_phys = ca->ca_paddr; sc->sc_bt = (struct bt_regs *) bus_mapin(ca->ca_bustype, ca->ca_paddr, sizeof(struct bt_regs *)); /* 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; /* * BT458 chip initialization as described in Brooktree's * 1993 Graphics and Imaging Product Databook (DB004-1/93). */ bt->bt_addr = 0x04; /* select read mask register */ bt->bt_ctrl = 0xff; /* all planes on */ bt->bt_addr = 0x05; /* select blink mask register */ bt->bt_ctrl = 0x00; /* all planes non-blinking */ bt->bt_addr = 0x06; /* select command register */ bt->bt_ctrl = 0x43; /* palette enabled, overlay planes enabled */ bt->bt_addr = 0x07; /* select test register */ bt->bt_ctrl = 0x00; /* set test mode */ printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); /* Is the EEPROM console set for the cg4? */ if ((ee_console == EE_CONS_COLOR) || (ee_console == EE_CONS_P4OPT) ) { fb_attach(fb); } } int cg4open(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { int unit = minor(dev); if (unit >= cgfourcd.cd_ndevs || cgfourcd.cd_devs[unit] == NULL) return (ENXIO); return (0); } int cg4close(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { return (0); } int cg4ioctl(dev, cmd, data, flags, p) dev_t dev; u_long cmd; caddr_t data; int flags; struct proc *p; { struct cg4_softc *sc = cgfourcd.cd_devs[minor(dev)]; return (fbioctlfb(&sc->sc_fb, cmd, data)); } /* * Return the address that would map the given device at the given * offset, allowing for the given protection, or return -1 for error. * * X11 expects its mmap'd region to look like this: * 128k overlay memory * 128k overlay-enable bitmap * 1024k color memory * * The hardware really looks like this (starting at ca_paddr) * 4 bytes Brooktree DAC registers * 2MB-4 gap * 128k overlay memory * 1920k gap * 128k overlay-enable bitmap * 1920k gap * 1024k color memory */ int cg4map(dev, off, prot) dev_t dev; int off, prot; { struct cg4_softc *sc = cgfourcd.cd_devs[minor(dev)]; int realoff; if (off & PGOFSET) panic("cg4map"); realoff = off + CG4REG_OVERLAY; if (off >= 0x20000) { off -= 0x20000; realoff += 0x1e0000; } if (off >= 0x20000) { off -= 0x20000; realoff += 0x1e0000; } if ((unsigned)off >= CG4_FBSIZE) return (-1); /* * I turned on PMAP_NC here to disable the cache as I was * getting horribly broken behaviour with it on. */ return ((sc->sc_phys + realoff) | PMAP_NC); } /* * Internal ioctl functions. */ /* FBIOGATTR: */ static int cg4gattr(fb, fba) struct fbdevice *fb; struct fbgattr *fba; { fba->real_type = fb->fb_fbtype.fb_type; fba->owner = 0; /* XXX - TIOCCONS stuff? */ fba->fbtype = fb->fb_fbtype; fba->sattr.flags = 0; fba->sattr.emu_type = fb->fb_fbtype.fb_type; fba->sattr.dev_specific[0] = -1; fba->emu_types[0] = fb->fb_fbtype.fb_type; fba->emu_types[1] = -1; return (0); } /* FBIOGVIDEO: */ static int cg4gvideo(fb, on) struct fbdevice *fb; int *on; { struct cg4_softc *sc = fb->fb_private; *on = !sc->sc_blanked; return (0); } /* FBIOSVIDEO: */ static int cg4svideo(fb, on) struct fbdevice *fb; int *on; { struct cg4_softc *sc = fb->fb_private; register volatile struct bt_regs *bt = sc->sc_bt; if ((*on == 0) && (sc->sc_blanked == 0)) { /* Turn OFF video (blank it). */ 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; } if ((*on != 0) && (sc->sc_blanked != 0)) { /* Turn video back ON (unblank). */ sc->sc_blanked = 0; /* 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 */ } return (0); } /* FBIOGETCMAP: */ static int cg4getcmap(fb, cmap) struct fbdevice *fb; struct fbcmap *cmap; { struct cg4_softc *sc = fb->fb_private; return (bt_getcmap(cmap, &sc->sc_cmap, 256)); } /* FBIOPUTCMAP: */ static int cg4putcmap(fb, cmap) struct fbdevice *fb; struct fbcmap *cmap; { struct cg4_softc *sc = fb->fb_private; int error; /* copy to software map */ error = bt_putcmap(cmap, &sc->sc_cmap, 256); if (error == 0) { /* now blast them into the chip */ /* XXX should use retrace interrupt */ cg4loadcmap(sc, cmap->index, cmap->count); } return (error); } /* * Load a subset of the current (new) colormap into the Brooktree DAC. */ static void cg4loadcmap(sc, start, ncolors) struct cg4_softc *sc; int start, ncolors; { volatile struct bt_regs *bt; u_int *ip; 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++; }