508 lines
13 KiB
C
508 lines
13 KiB
C
/* $NetBSD: tcx.c,v 1.6 1996/12/10 22:55:05 pk Exp $ */
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/*
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* Copyright (c) 1996 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 REGENTS OR CONTRIBUTORS BE
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* 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/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 <machine/fbio.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 <vm/vm.h>
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#include <machine/autoconf.h>
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#include <machine/pmap.h>
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#include <machine/fbvar.h>
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#include <machine/cpu.h>
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#include <machine/conf.h>
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#include <sparc/dev/btreg.h>
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#include <sparc/dev/btvar.h>
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#include <sparc/dev/tcxreg.h>
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#include <sparc/dev/sbusvar.h>
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#if 0
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union cursor_cmap { /* colormap, like bt_cmap, but tiny */
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u_char cm_map[2][3]; /* 2 R/G/B entries */
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u_int cm_chip[2]; /* 2 chip equivalents */
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};
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struct tcx_cursor { /* tcx hardware cursor status */
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short cc_enable; /* cursor is enabled */
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struct fbcurpos cc_pos; /* position */
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struct fbcurpos cc_hot; /* hot-spot */
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struct fbcurpos cc_size; /* size of mask & image fields */
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u_int cc_bits[2][32]; /* space for mask & image bits */
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union cursor_cmap cc_color; /* cursor colormap */
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};
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#endif
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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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struct rom_reg sc_physadr[TCX_NREG]; /* phys addr of h/w */
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int sc_bustype; /* type of bus we live on */
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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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struct cfdriver tcx_cd = {
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NULL, "tcx", DV_DULL
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};
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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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extern int fbnode;
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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 confargs *ca = aux;
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struct romaux *ra = &ca->ca_ra;
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if (strcmp(ra->ra_name, OBPNAME))
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return (0);
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/*
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* Mask out invalid flags from the user.
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*/
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cf->cf_flags &= FB_USERMASK;
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if (ca->ca_bustype == BUS_SBUS)
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return (1);
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return (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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register struct tcx_softc *sc = (struct tcx_softc *)self;
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register struct confargs *ca = args;
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register int node = 0, ramsize, i;
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register volatile struct bt_regs *bt;
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struct fbdevice *fb = &sc->sc_fb;
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int isconsole = 0, sbus = 1;
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extern struct tty *fbconstty;
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fb->fb_driver = &tcx_fbdriver;
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fb->fb_device = &sc->sc_dev;
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fb->fb_flags = sc->sc_dev.dv_cfdata->cf_flags;
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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 (ca->ca_ra.ra_nreg != TCX_NREG)
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panic("tcx: oops");
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/* Copy register address spaces */
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for (i = 0; i < TCX_NREG; i++)
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sc->sc_physadr[i] = ca->ca_ra.ra_reg[i];
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/* XXX - fix THC and TEC offsets */
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sc->sc_physadr[TCX_REG_TEC].rr_paddr += 0x1000;
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sc->sc_physadr[TCX_REG_THC].rr_paddr += 0x1000;
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sc->sc_bt = bt = (volatile struct bt_regs *)
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mapiodev(&ca->ca_ra.ra_reg[TCX_REG_CMAP], 0,
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sizeof *sc->sc_bt, ca->ca_bustype);
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sc->sc_thc = (volatile struct tcx_thc *)
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mapiodev(&ca->ca_ra.ra_reg[TCX_REG_THC], 0,
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sizeof *sc->sc_thc, ca->ca_bustype);
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switch (ca->ca_bustype) {
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case BUS_SBUS:
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node = ca->ca_ra.ra_node;
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break;
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case BUS_OBIO:
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default:
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printf("TCX on bus %x?\n", ca->ca_bustype);
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return;
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}
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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(fb, fb->fb_type.fb_depth, 1152, 900,
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node, ca->ca_bustype);
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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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isconsole = node == fbnode && fbconstty != NULL;
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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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/* grab initial (current) color map (DOES THIS WORK?) */
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bt->bt_addr = 0;
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for (i = 0; i < 256 * 3; i++)
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((char *)&sc->sc_cmap)[i] = bt->bt_cmap >> 24;
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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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if (sbus)
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sbus_establish(&sc->sc_sd, &sc->sc_dev);
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if (node == fbnode)
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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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register caddr_t data;
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int flags;
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struct proc *p;
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{
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register 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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return (bt_getcmap((struct fbcmap *)data, &sc->sc_cmap, 256));
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case FBIOPUTCMAP:
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/* copy to software map */
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#define p ((struct fbcmap *)data)
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error = bt_putcmap(p, &sc->sc_cmap, 256);
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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(%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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register struct tcx_softc *sc;
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{
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register 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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register struct tcx_softc *sc;
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register int start, ncolors;
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{
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register volatile struct bt_regs *bt;
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register u_int *ip, i;
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register 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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int
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tcxmmap(dev, off, prot)
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dev_t dev;
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int off, prot;
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{
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register struct tcx_softc *sc = tcx_cd.cd_devs[minor(dev)];
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register struct mmo *mo;
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register 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++) {
|
|
if ((u_int)off < mo->mo_uaddr)
|
|
continue;
|
|
u = off - mo->mo_uaddr;
|
|
sz = mo->mo_size ? mo->mo_size : sc->sc_fb.fb_type.fb_size;
|
|
if (u < sz)
|
|
return (REG2PHYS(&sc->sc_physadr[mo->mo_bank],
|
|
u, sc->sc_bustype) | PMAP_NC);
|
|
}
|
|
#ifdef DEBUG
|
|
{
|
|
register struct proc *p = curproc; /* XXX */
|
|
log(LOG_NOTICE, "tcxmmap(%x) (%s[%d])\n", off, p->p_comm, p->p_pid);
|
|
}
|
|
#endif
|
|
return (-1); /* not a user-map offset */
|
|
}
|