488 lines
12 KiB
C
488 lines
12 KiB
C
/* $NetBSD: tcx.c,v 1.4 2001/11/13 06:58:18 lukem Exp $ */
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/*
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* Copyright (c) 1996,1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* color display (TCX) driver.
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*
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* Does not handle interrupts, even though they can occur.
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*
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* XXX should defer colormap updates to vertical retrace interrupts
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tcx.c,v 1.4 2001/11/13 06:58:18 lukem Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/device.h>
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#include <sys/ioctl.h>
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#include <sys/malloc.h>
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#include <sys/mman.h>
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#include <sys/tty.h>
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#include <sys/conf.h>
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#ifdef DEBUG
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#include <sys/proc.h>
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#include <sys/syslog.h>
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#endif
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#include <machine/bus.h>
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#include <machine/autoconf.h>
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#include <dev/sun/fbio.h>
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#include <dev/sun/fbvar.h>
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#include <dev/sun/btreg.h>
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#include <dev/sun/btvar.h>
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#include <dev/sbus/sbusvar.h>
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#include <dev/sbus/tcxreg.h>
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#include <machine/conf.h>
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/* per-display variables */
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struct tcx_softc {
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struct device sc_dev; /* base device */
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struct sbusdev sc_sd; /* sbus device */
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struct fbdevice sc_fb; /* frame buffer device */
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bus_space_tag_t sc_bustag;
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struct sbus_reg sc_physadr[TCX_NREG]; /* phys addr of h/w */
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volatile struct bt_regs *sc_bt; /* Brooktree registers */
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volatile struct tcx_thc *sc_thc;/* THC registers */
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short sc_blanked; /* true if blanked */
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union bt_cmap sc_cmap; /* Brooktree color map */
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};
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/* autoconfiguration driver */
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static void tcxattach __P((struct device *, struct device *, void *));
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static int tcxmatch __P((struct device *, struct cfdata *, void *));
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static void tcx_unblank __P((struct device *));
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/* cdevsw prototypes */
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cdev_decl(tcx);
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struct cfattach tcx_ca = {
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sizeof(struct tcx_softc), tcxmatch, tcxattach
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};
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extern struct cfdriver tcx_cd;
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/* frame buffer generic driver */
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static struct fbdriver tcx_fbdriver = {
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tcx_unblank, tcxopen, tcxclose, tcxioctl, tcxpoll, tcxmmap
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};
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static void tcx_reset __P((struct tcx_softc *));
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static void tcx_loadcmap __P((struct tcx_softc *, int, int));
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#define OBPNAME "SUNW,tcx"
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/*
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* Match a tcx.
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*/
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int
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tcxmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct sbus_attach_args *sa = aux;
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return (strcmp(sa->sa_name, OBPNAME) == 0);
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}
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/*
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* Attach a display.
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*/
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void
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tcxattach(parent, self, args)
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struct device *parent, *self;
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void *args;
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{
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struct tcx_softc *sc = (struct tcx_softc *)self;
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struct sbus_attach_args *sa = args;
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int node, ramsize;
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volatile struct bt_regs *bt;
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struct fbdevice *fb = &sc->sc_fb;
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bus_space_handle_t bh;
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int isconsole;
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sc->sc_bustag = sa->sa_bustag;
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node = sa->sa_node;
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fb->fb_driver = &tcx_fbdriver;
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fb->fb_device = &sc->sc_dev;
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/* Mask out invalid flags from the user. */
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fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags & FB_USERMASK;
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fb->fb_type.fb_depth = node_has_property(node, "tcx-24-bit")
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? 24
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: (node_has_property(node, "tcx-8-bit")
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? 8
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: 8);
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fb_setsize_obp(fb, fb->fb_type.fb_depth, 1152, 900, node);
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ramsize = fb->fb_type.fb_height * fb->fb_linebytes;
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fb->fb_type.fb_cmsize = 256;
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fb->fb_type.fb_size = ramsize;
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printf(": %s, %d x %d", OBPNAME,
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fb->fb_type.fb_width,
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fb->fb_type.fb_height);
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/*
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* XXX - should be set to FBTYPE_TCX.
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* XXX For CG3 emulation to work in current (96/6) X11 servers,
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* XXX `fbtype' must point to an "unregocnised" entry.
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*/
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fb->fb_type.fb_type = FBTYPE_RESERVED3;
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if (sa->sa_nreg != TCX_NREG) {
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printf("%s: only %d register sets\n",
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self->dv_xname, sa->sa_nreg);
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return;
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}
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bcopy(sa->sa_reg, sc->sc_physadr,
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sa->sa_nreg * sizeof(struct sbus_reg));
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/* XXX - fix THC and TEC offsets */
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sc->sc_physadr[TCX_REG_TEC].sbr_offset += 0x1000;
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sc->sc_physadr[TCX_REG_THC].sbr_offset += 0x1000;
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/* Map the register banks we care about */
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if (sbus_bus_map(sa->sa_bustag,
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(bus_type_t)sc->sc_physadr[TCX_REG_THC].sbr_slot,
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(bus_addr_t)sc->sc_physadr[TCX_REG_THC].sbr_offset,
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sizeof (struct tcx_thc),
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BUS_SPACE_MAP_LINEAR,
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0, &bh) != 0) {
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printf("tcxattach: cannot map thc registers\n");
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return;
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}
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sc->sc_thc = (volatile struct tcx_thc *)bh;
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if (sbus_bus_map(sa->sa_bustag,
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(bus_type_t)sc->sc_physadr[TCX_REG_CMAP].sbr_slot,
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(bus_addr_t)sc->sc_physadr[TCX_REG_CMAP].sbr_offset,
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sizeof (struct bt_regs),
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BUS_SPACE_MAP_LINEAR,
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0, &bh) != 0) {
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printf("tcxattach: cannot map bt registers\n");
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return;
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}
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sc->sc_bt = bt = (volatile struct bt_regs *)bh;
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isconsole = fb_is_console(node);
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printf(", id %d, rev %d, sense %d",
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(sc->sc_thc->thc_config & THC_CFG_FBID) >> THC_CFG_FBID_SHIFT,
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(sc->sc_thc->thc_config & THC_CFG_REV) >> THC_CFG_REV_SHIFT,
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(sc->sc_thc->thc_config & THC_CFG_SENSE) >> THC_CFG_SENSE_SHIFT
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);
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/* reset cursor & frame buffer controls */
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tcx_reset(sc);
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/* Initialize the default color map. */
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bt_initcmap(&sc->sc_cmap, 256);
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tcx_loadcmap(sc, 0, 256);
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/* enable video */
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sc->sc_thc->thc_hcmisc |= THC_MISC_VIDEN;
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if (isconsole) {
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printf(" (console)\n");
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} else
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printf("\n");
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sbus_establish(&sc->sc_sd, &sc->sc_dev);
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fb_attach(&sc->sc_fb, isconsole);
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}
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int
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tcxopen(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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int unit = minor(dev);
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if (unit >= tcx_cd.cd_ndevs || tcx_cd.cd_devs[unit] == NULL)
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return (ENXIO);
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return (0);
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}
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int
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tcxclose(dev, flags, mode, p)
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dev_t dev;
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int flags, mode;
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struct proc *p;
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{
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struct tcx_softc *sc = tcx_cd.cd_devs[minor(dev)];
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tcx_reset(sc);
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return (0);
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}
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int
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tcxioctl(dev, cmd, data, flags, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flags;
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struct proc *p;
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{
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struct tcx_softc *sc = tcx_cd.cd_devs[minor(dev)];
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int error;
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switch (cmd) {
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case FBIOGTYPE:
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*(struct fbtype *)data = sc->sc_fb.fb_type;
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break;
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case FBIOGATTR:
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#define fba ((struct fbgattr *)data)
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fba->real_type = sc->sc_fb.fb_type.fb_type;
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fba->owner = 0; /* XXX ??? */
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fba->fbtype = sc->sc_fb.fb_type;
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fba->sattr.flags = 0;
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fba->sattr.emu_type = sc->sc_fb.fb_type.fb_type;
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fba->sattr.dev_specific[0] = -1;
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fba->emu_types[0] = sc->sc_fb.fb_type.fb_type;
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fba->emu_types[1] = FBTYPE_SUN3COLOR;
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fba->emu_types[2] = -1;
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#undef fba
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break;
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case FBIOGETCMAP:
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#define p ((struct fbcmap *)data)
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return (bt_getcmap(p, &sc->sc_cmap, 256, 1));
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case FBIOPUTCMAP:
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/* copy to software map */
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error = bt_putcmap(p, &sc->sc_cmap, 256, 1);
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if (error)
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return (error);
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/* now blast them into the chip */
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/* XXX should use retrace interrupt */
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tcx_loadcmap(sc, p->index, p->count);
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#undef p
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break;
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case FBIOGVIDEO:
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*(int *)data = sc->sc_blanked;
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break;
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case FBIOSVIDEO:
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if (*(int *)data)
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tcx_unblank(&sc->sc_dev);
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else if (!sc->sc_blanked) {
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sc->sc_blanked = 1;
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sc->sc_thc->thc_hcmisc &= ~THC_MISC_VIDEN;
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/* Put monitor in `power-saving mode' */
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sc->sc_thc->thc_hcmisc |= THC_MISC_VSYNC_DISABLE;
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sc->sc_thc->thc_hcmisc |= THC_MISC_HSYNC_DISABLE;
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}
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break;
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default:
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#ifdef DEBUG
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log(LOG_NOTICE, "tcxioctl(0x%lx) (%s[%d])\n", cmd,
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p->p_comm, p->p_pid);
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#endif
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return (ENOTTY);
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}
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return (0);
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}
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int
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tcxpoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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return (seltrue(dev, events, p));
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}
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/*
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* Clean up hardware state (e.g., after bootup or after X crashes).
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*/
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static void
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tcx_reset(sc)
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struct tcx_softc *sc;
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{
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volatile struct bt_regs *bt;
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/* Enable cursor in Brooktree DAC. */
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bt = sc->sc_bt;
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bt->bt_addr = 0x06 << 24;
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bt->bt_ctrl |= 0x03 << 24;
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}
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/*
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* Load a subset of the current (new) colormap into the color DAC.
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*/
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static void
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tcx_loadcmap(sc, start, ncolors)
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struct tcx_softc *sc;
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int start, ncolors;
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{
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volatile struct bt_regs *bt;
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u_int *ip, i;
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int count;
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ip = &sc->sc_cmap.cm_chip[BT_D4M3(start)]; /* start/4 * 3 */
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count = BT_D4M3(start + ncolors - 1) - BT_D4M3(start) + 3;
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bt = sc->sc_bt;
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bt->bt_addr = BT_D4M4(start) << 24;
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while (--count >= 0) {
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i = *ip++;
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/* hardware that makes one want to pound boards with hammers */
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bt->bt_cmap = i;
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bt->bt_cmap = i << 8;
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bt->bt_cmap = i << 16;
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bt->bt_cmap = i << 24;
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}
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}
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static void
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tcx_unblank(dev)
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struct device *dev;
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{
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struct tcx_softc *sc = (struct tcx_softc *)dev;
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if (sc->sc_blanked) {
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sc->sc_blanked = 0;
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sc->sc_thc->thc_hcmisc &= ~THC_MISC_VSYNC_DISABLE;
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sc->sc_thc->thc_hcmisc &= ~THC_MISC_HSYNC_DISABLE;
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sc->sc_thc->thc_hcmisc |= THC_MISC_VIDEN;
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}
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}
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/*
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* Base addresses at which users can mmap() the various pieces of a tcx.
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*/
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#define TCX_USER_RAM 0x00000000
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#define TCX_USER_RAM24 0x01000000
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#define TCX_USER_RAM_COMPAT 0x04000000 /* cg3 emulation */
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#define TCX_USER_STIP 0x10000000
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#define TCX_USER_BLIT 0x20000000
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#define TCX_USER_RDFB32 0x28000000
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#define TCX_USER_RSTIP 0x30000000
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#define TCX_USER_RBLIT 0x38000000
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#define TCX_USER_TEC 0x70001000
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#define TCX_USER_BTREGS 0x70002000
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#define TCX_USER_THC 0x70004000
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#define TCX_USER_DHC 0x70008000
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#define TCX_USER_ALT 0x7000a000
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#define TCX_USER_UART 0x7000c000
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#define TCX_USER_VRT 0x7000e000
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#define TCX_USER_ROM 0x70010000
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struct mmo {
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u_int mo_uaddr; /* user (virtual) address */
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u_int mo_size; /* size, or 0 for video ram size */
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u_int mo_bank; /* register bank number */
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};
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/*
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* Return the address that would map the given device at the given
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* offset, allowing for the given protection, or return -1 for error.
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*
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* XXX needs testing against `demanding' applications (e.g., aviator)
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*/
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paddr_t
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tcxmmap(dev, off, prot)
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dev_t dev;
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off_t off;
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int prot;
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{
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struct tcx_softc *sc = tcx_cd.cd_devs[minor(dev)];
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struct sbus_reg *rr = sc->sc_physadr;
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struct mmo *mo;
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u_int u, sz;
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static struct mmo mmo[] = {
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{ TCX_USER_RAM, 0, TCX_REG_DFB8 },
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{ TCX_USER_RAM24, 0, TCX_REG_DFB24 },
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{ TCX_USER_RAM_COMPAT, 0, TCX_REG_DFB8 },
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{ TCX_USER_STIP, 1, TCX_REG_STIP },
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{ TCX_USER_BLIT, 1, TCX_REG_BLIT },
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{ TCX_USER_RDFB32, 1, TCX_REG_RDFB32 },
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{ TCX_USER_RSTIP, 1, TCX_REG_RSTIP },
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{ TCX_USER_RBLIT, 1, TCX_REG_RBLIT },
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{ TCX_USER_TEC, 1, TCX_REG_TEC },
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{ TCX_USER_BTREGS, 8192 /* XXX */, TCX_REG_CMAP },
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{ TCX_USER_THC, sizeof(struct tcx_thc), TCX_REG_THC },
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{ TCX_USER_DHC, 1, TCX_REG_DHC },
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{ TCX_USER_ALT, 1, TCX_REG_ALT },
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{ TCX_USER_ROM, 65536, TCX_REG_ROM },
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};
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#define NMMO (sizeof mmo / sizeof *mmo)
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if (off & PGOFSET)
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panic("tcxmmap");
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/*
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* Entries with size 0 map video RAM (i.e., the size in fb data).
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*
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* Since we work in pages, the fact that the map offset table's
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* sizes are sometimes bizarre (e.g., 1) is effectively ignored:
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* one byte is as good as one page.
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*/
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for (mo = mmo; mo < &mmo[NMMO]; mo++) {
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if ((u_int)off < mo->mo_uaddr)
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continue;
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u = off - mo->mo_uaddr;
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sz = mo->mo_size ? mo->mo_size : sc->sc_fb.fb_type.fb_size;
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if (u < sz) {
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bus_type_t t = (bus_type_t)rr[mo->mo_bank].sbr_slot;
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bus_addr_t a = BUS_ADDR(t, rr[mo->mo_bank].sbr_offset);
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return (bus_space_mmap(sc->sc_bustag,
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a,
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u,
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prot,
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BUS_SPACE_MAP_LINEAR));
|
|
}
|
|
}
|
|
return (-1);
|
|
}
|