/* $OpenBSD: cg4.c,v 1.11 2002/03/14 01:26:46 millert Exp $ */ /* $NetBSD: cg4.c,v 1.11 1996/10/29 19:54:19 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. * * Credits, history: * Gordon Ross created this driver based on the cg3 driver from * the sparc port as distributed in BSD 4.4 Lite, but included * support for only the "type B" adapter (Brooktree DACs). * Ezra Story added support for the "type A" (AMD DACs). * * Todo: * Make this driver handle video interrupts. * Defer colormap updates to vertical retrace interrupts. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fbvar.h" #include "btreg.h" #include "btvar.h" #include "cg4reg.h" #define CG4_MMAP_SIZE (CG4_OVERLAY_SIZE + CG4_ENABLE_SIZE + CG4_PIXMAP_SIZE) extern unsigned char cpu_machine_id; #define CMAP_SIZE 256 struct soft_cmap { u_char r[CMAP_SIZE]; u_char g[CMAP_SIZE]; u_char b[CMAP_SIZE]; }; /* per-display variables */ struct cg4_softc { struct device sc_dev; /* base device */ struct fbdevice sc_fb; /* frame buffer device */ int sc_cg4type; /* A or B */ void *sc_va_cmap; /* Colormap h/w (mapped KVA) */ int sc_pa_overlay; /* phys. addr. of overlay plane */ int sc_pa_enable; /* phys. addr. of enable plane */ int sc_pa_pixmap; /* phys. addr. of color plane */ int sc_blanked; /* true if blanked */ union bt_cmap *sc_btcm; /* Brooktree color map */ struct soft_cmap sc_cmap; /* Generic soft colormap. */ }; /* autoconfiguration driver */ static void cg4attach(struct device *, struct device *, void *); static int cg4match(struct device *, void *, void *); struct cfattach cgfour_ca = { sizeof(struct cg4_softc), cg4match, cg4attach }; struct cfdriver cgfour_cd = { NULL, "cgfour", DV_DULL }; /* frame buffer generic driver */ static int cg4gattr(struct fbdevice *, struct fbgattr *); static int cg4gvideo(struct fbdevice *, int *); static int cg4svideo(struct fbdevice *, int *); static int cg4getcmap(struct fbdevice *, struct fbcmap *); static int cg4putcmap(struct fbdevice *, struct fbcmap *); static void cg4a_init(struct cg4_softc *); static void cg4a_svideo(struct cg4_softc *, int); static void cg4a_ldcmap(struct cg4_softc *); static void cg4b_init(struct cg4_softc *); static void cg4b_svideo(struct cg4_softc *, int); static void cg4b_ldcmap(struct cg4_softc *); static struct fbdriver cg4_fbdriver = { cg4open, cg4close, cg4mmap, cg4gattr, cg4gvideo, cg4svideo, cg4getcmap, cg4putcmap }; /* * Match a cg4. */ static int cg4match(parent, vcf, args) struct device *parent; void *vcf, *args; { struct confargs *ca = args; int paddr; /* XXX: Huge hack due to lack of probe info... */ /* XXX: Machines that might have a cg4 (gag). */ /* XXX: Need info on the "P4" register... */ switch (cpu_machine_id) { case SUN3_MACH_110: /* XXX: Assume type A. */ if (ca->ca_paddr == -1) ca->ca_paddr = CG4A_DEF_BASE; if (bus_peek(ca->ca_bustype, ca->ca_paddr, 1) == -1) return (0); if (bus_peek(BUS_OBIO, CG4A_OBIO_CMAP, 1) == -1) return (0); break; case SUN3_MACH_60: /* XXX: Assume type A. */ if (ca->ca_paddr == -1) ca->ca_paddr = CG4B_DEF_BASE; paddr = ca->ca_paddr; if (bus_peek(ca->ca_bustype, paddr, 1) == -1) return (0); /* Make sure we're color */ paddr += CG4B_OFF_PIXMAP; if (bus_peek(ca->ca_bustype, paddr, 1) == -1) return (0); break; default: return (0); } return (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; /* XXX: should do better than this... */ switch (cpu_machine_id) { case SUN3_MACH_110: sc->sc_cg4type = CG4_TYPE_A; break; case SUN3_MACH_60: default: sc->sc_cg4type = CG4_TYPE_B; } fb->fb_driver = &cg4_fbdriver; 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_MMAP_SIZE; switch (sc->sc_cg4type) { case CG4_TYPE_A: /* Sun3/110 */ sc->sc_va_cmap = bus_mapin(BUS_OBIO, CG4A_OBIO_CMAP, sizeof(struct amd_regs)); sc->sc_pa_overlay = ca->ca_paddr + CG4A_OFF_OVERLAY; sc->sc_pa_enable = ca->ca_paddr + CG4A_OFF_ENABLE; sc->sc_pa_pixmap = ca->ca_paddr + CG4A_OFF_PIXMAP; sc->sc_btcm = NULL; cg4a_init(sc); break; case CG4_TYPE_B: /* Sun3/60 */ default: sc->sc_va_cmap = (struct bt_regs *) bus_mapin(ca->ca_bustype, ca->ca_paddr, sizeof(struct bt_regs *)); sc->sc_pa_overlay = ca->ca_paddr + CG4B_OFF_OVERLAY; sc->sc_pa_enable = ca->ca_paddr + CG4B_OFF_ENABLE; sc->sc_pa_pixmap = ca->ca_paddr + CG4B_OFF_PIXMAP; sc->sc_btcm = malloc(sizeof(union bt_cmap), M_DEVBUF, M_WAITOK); cg4b_init(sc); break; } printf(" (%dx%d)\n", fbt->fb_width, fbt->fb_height); fb_attach(fb, 4); } int cg4open(dev, flags, mode, p) dev_t dev; int flags, mode; struct proc *p; { int unit = minor(dev); if (unit >= cgfour_cd.cd_ndevs || cgfour_cd.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 = cgfour_cd.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 data 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 */ paddr_t cg4mmap(dev, off, prot) dev_t dev; off_t off; int prot; { struct cg4_softc *sc = cgfour_cd.cd_devs[minor(dev)]; register int physbase; if (off & PGOFSET) panic("cg4mmap"); if ((unsigned)off >= CG4_MMAP_SIZE) return (-1); if (off < 0x40000) { if (off < 0x20000) { physbase = sc->sc_pa_overlay; } else { /* enable plane */ off -= 0x20000; physbase = sc->sc_pa_enable; } } else { /* pixel map */ off -= 0x40000; physbase = sc->sc_pa_pixmap; } /* * I turned on PMAP_NC here to disable the cache as I was * getting horribly broken behaviour with it on. */ return ((physbase + off) | 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; int state; state = *on; if (sc->sc_cg4type == CG4_TYPE_A) cg4a_svideo(sc, state); else cg4b_svideo(sc, state); return (0); } /* * FBIOGETCMAP: * Copy current colormap out to user space. */ static int cg4getcmap(fb, fbcm) struct fbdevice *fb; struct fbcmap *fbcm; { struct cg4_softc *sc = fb->fb_private; struct soft_cmap *cm = &sc->sc_cmap; int error, start, count; start = fbcm->index; count = fbcm->count; if ((start < 0) || (start >= CMAP_SIZE) || (count < 0) || (start + count > CMAP_SIZE) ) return (EINVAL); if ((error = copyout(&cm->r[start], fbcm->red, count)) != 0) return (error); if ((error = copyout(&cm->g[start], fbcm->green, count)) != 0) return (error); if ((error = copyout(&cm->b[start], fbcm->blue, count)) != 0) return (error); return (0); } /* * FBIOPUTCMAP: * Copy new colormap from user space and load. */ static int cg4putcmap(fb, fbcm) struct fbdevice *fb; struct fbcmap *fbcm; { struct cg4_softc *sc = fb->fb_private; struct soft_cmap *cm = &sc->sc_cmap; int error, start, count; start = fbcm->index; count = fbcm->count; if ((start < 0) || (start >= CMAP_SIZE) || (count < 0) || (start + count > CMAP_SIZE) ) return (EINVAL); if ((error = copyin(fbcm->red, &cm->r[start], count)) != 0) return (error); if ((error = copyin(fbcm->green, &cm->g[start], count)) != 0) return (error); if ((error = copyin(fbcm->blue, &cm->b[start], count)) != 0) return (error); if (sc->sc_cg4type == CG4_TYPE_A) cg4a_ldcmap(sc); else cg4b_ldcmap(sc); return (0); } /**************************************************************** * Routines for the "Type A" hardware ****************************************************************/ static void cg4a_init(sc) struct cg4_softc *sc; { volatile struct amd_regs *ar = sc->sc_va_cmap; struct soft_cmap *cm = &sc->sc_cmap; int i; /* grab initial (current) color map */ for(i = 0; i < 256; i++) { cm->r[i] = ar->r[i]; cm->g[i] = ar->g[i]; cm->b[i] = ar->b[i]; } } static void cg4a_ldcmap(sc) struct cg4_softc *sc; { volatile struct amd_regs *ar = sc->sc_va_cmap; struct soft_cmap *cm = &sc->sc_cmap; int i; /* * Now blast them into the chip! * XXX Should use retrace interrupt! * Just set a "need load" bit and let the * retrace interrupt handler do the work. */ for(i = 0; i < 256; i++) { ar->r[i] = cm->r[i]; ar->g[i] = cm->g[i]; ar->b[i] = cm->b[i]; } } static void cg4a_svideo(sc, on) struct cg4_softc *sc; int on; { volatile struct amd_regs *ar = sc->sc_va_cmap; int i; if ((on == 0) && (sc->sc_blanked == 0)) { /* Turn OFF video (make it blank). */ sc->sc_blanked = 1; /* Load fake "all zero" colormap. */ for (i = 0; i < 256; i++) { ar->r[i] = 0; ar->g[i] = 0; ar->b[i] = 0; } } if ((on != 0) && (sc->sc_blanked != 0)) { /* Turn video back ON (unblank). */ sc->sc_blanked = 0; /* Restore normal colormap. */ cg4a_ldcmap(sc); } } /**************************************************************** * Routines for the "Type B" hardware ****************************************************************/ static void cg4b_init(sc) struct cg4_softc *sc; { volatile struct bt_regs *bt = sc->sc_va_cmap; struct soft_cmap *cm = &sc->sc_cmap; union bt_cmap *btcm = sc->sc_btcm; int i; /* * 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 */ /* grab initial (current) color map */ bt->bt_addr = 0; for (i = 0; i < (256 * 3 / 4); i++) { btcm->cm_chip[i] = bt->bt_cmap; } /* Transpose into S/W form. */ for (i = 0; i < 256; i++) { cm->r[i] = btcm->cm_map[i][0]; cm->g[i] = btcm->cm_map[i][1]; cm->b[i] = btcm->cm_map[i][2]; } } static void cg4b_ldcmap(sc) struct cg4_softc *sc; { volatile struct bt_regs *bt = sc->sc_va_cmap; struct soft_cmap *cm = &sc->sc_cmap; union bt_cmap *btcm = sc->sc_btcm; int i; /* * Now blast them into the chip! * XXX Should use retrace interrupt! * Just set a "need load" bit and let the * retrace interrupt handler do the work. */ /* Transpose into H/W form. */ for (i = 0; i < 256; i++) { btcm->cm_map[i][0] = cm->r[i]; btcm->cm_map[i][1] = cm->g[i]; btcm->cm_map[i][2] = cm->b[i]; } bt->bt_addr = 0; for (i = 0; i < (256 * 3 / 4); i++) { bt->bt_cmap = btcm->cm_chip[i]; } } static void cg4b_svideo(sc, on) struct cg4_softc *sc; int on; { volatile struct bt_regs *bt = sc->sc_va_cmap; int i; if ((on == 0) && (sc->sc_blanked == 0)) { /* Turn OFF video (make it blank). */ sc->sc_blanked = 1; /* Load fake "all zero" colormap. */ bt->bt_addr = 0; for (i = 0; i < (256 * 3 / 4); i++) bt->bt_cmap = 0; } if ((on != 0) && (sc->sc_blanked != 0)) { /* Turn video back ON (unblank). */ sc->sc_blanked = 0; /* Restore normal colormap. */ cg4b_ldcmap(sc); } }