/* $NetBSD: cgthree.c,v 1.10 2003/08/25 17:50:30 uwe Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Paul Kranenburg. * * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * color display (cgthree) driver. * * Does not handle interrupts, even though they can occur. * * XXX should defer colormap updates to vertical retrace interrupts */ #include __KERNEL_RCSID(0, "$NetBSD: cgthree.c,v 1.10 2003/08/25 17:50:30 uwe Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static void cgthreeunblank(struct device *); static void cgthreeloadcmap(struct cgthree_softc *, int, int); static void cgthree_set_video(struct cgthree_softc *, int); static int cgthree_get_video(struct cgthree_softc *); extern struct cfdriver cgthree_cd; dev_type_open(cgthreeopen); dev_type_ioctl(cgthreeioctl); dev_type_mmap(cgthreemmap); const struct cdevsw cgthree_cdevsw = { cgthreeopen, nullclose, noread, nowrite, cgthreeioctl, nostop, notty, nopoll, cgthreemmap, nokqfilter }; /* frame buffer generic driver */ static struct fbdriver cgthreefbdriver = { cgthreeunblank, cgthreeopen, nullclose, cgthreeioctl, nopoll, cgthreemmap, nokqfilter }; /* Video control parameters */ struct cg3_videoctrl { unsigned char sense; /* Monitor sense value */ unsigned char vctrl[12]; } cg3_videoctrl[] = { /* Missing entries: sense 0x10, 0x30, 0x50 */ { 0x40, /* this happens to be my 19'' 1152x900 gray-scale monitor */ {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} }, { 0x00, /* default? must be last */ {0xbb, 0x2b, 0x3, 0xb, 0xb3, 0x3, 0xaf, 0x2b, 0x2, 0xa, 0xff, 0x1} } }; void cgthreeattach(sc, name, isconsole) struct cgthree_softc *sc; char *name; int isconsole; { int i; struct fbdevice *fb = &sc->sc_fb; volatile struct fbcontrol *fbc = sc->sc_fbc; volatile struct bt_regs *bt = &fbc->fbc_dac; fb->fb_driver = &cgthreefbdriver; fb->fb_type.fb_cmsize = 256; fb->fb_type.fb_size = fb->fb_type.fb_height * fb->fb_linebytes; printf(": %s, %d x %d", name, fb->fb_type.fb_width, fb->fb_type.fb_height); /* Transfer video magic to board, if it's not running */ if ((fbc->fbc_ctrl & FBC_TIMING) == 0) { int sense = (fbc->fbc_status & FBS_MSENSE); /* Search table for video timings fitting this monitor */ for (i = 0; i < sizeof(cg3_videoctrl)/sizeof(cg3_videoctrl[0]); i++) { int j; if (sense != cg3_videoctrl[i].sense) continue; printf(" setting video ctrl"); for (j = 0; j < 12; j++) fbc->fbc_vcontrol[j] = cg3_videoctrl[i].vctrl[j]; fbc->fbc_ctrl |= FBC_TIMING; break; } } /* Initialize the default color map. */ bt_initcmap(&sc->sc_cmap, 256); cgthreeloadcmap(sc, 0, 256); /* make sure we are not blanked */ cgthree_set_video(sc, 1); BT_INIT(bt, 0); if (isconsole) { printf(" (console)\n"); #ifdef RASTERCONSOLE fbrcons_init(fb); #endif } else printf("\n"); fb_attach(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 cgthreeioctl(dev, cmd, data, flags, p) dev_t dev; u_long cmd; caddr_t data; int flags; struct proc *p; { struct cgthree_softc *sc = cgthree_cd.cd_devs[minor(dev)]; 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: #define p ((struct fbcmap *)data) return (bt_getcmap(p, &sc->sc_cmap, 256, 1)); case FBIOPUTCMAP: /* copy to software map */ error = bt_putcmap(p, &sc->sc_cmap, 256, 1); 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) struct cgthree_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_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. */ paddr_t cgthreemmap(dev, off, prot) dev_t dev; off_t off; int prot; { 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 (off < 0) return (-1); if ((u_int)off >= NOOVERLAY) off -= NOOVERLAY; else if ((u_int)off >= START) off -= START; else off = 0; if (off >= sc->sc_fb.fb_type.fb_size) return (-1); return (bus_space_mmap(sc->sc_bustag, sc->sc_paddr, CG3REG_MEM + off, prot, BUS_SPACE_MAP_LINEAR)); }