sys/dev/sbus/bwtwo_sbus.c

   1 /*      $NetBSD: bwtwo_sbus.c,v 1.28 2009/09/19 03:49:22 tsutsui Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 1992, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This software was developed by the Computer Systems Engineering group
  37  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
  38  * contributed to Berkeley.
  39  *
  40  * All advertising materials mentioning features or use of this software
  41  * must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Lawrence Berkeley Laboratory.
  44  *
  45  * Redistribution and use in source and binary forms, with or without
  46  * modification, are permitted provided that the following conditions
  47  * are met:
  48  * 1. Redistributions of source code must retain the above copyright
  49  *    notice, this list of conditions and the following disclaimer.
  50  * 2. Redistributions in binary form must reproduce the above copyright
  51  *    notice, this list of conditions and the following disclaimer in the
  52  *    documentation and/or other materials provided with the distribution.
  53  * 3. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  *
  69  *      @(#)bwtwo.c     8.1 (Berkeley) 6/11/93
  70  */
  71
  72 /*
  73  * black&white display (bwtwo) driver.
  74  *
  75  * Does not handle interrupts, even though they can occur.
  76  *
  77  * P4 and overlay plane support by Jason R. Thorpe <thorpej@NetBSD.org>.
  78  * Overlay plane handling hints and ideas provided by Brad Spencer.
  79  */
  80
  81 #include <sys/cdefs.h>
  82 __KERNEL_RCSID(0, "$NetBSD: bwtwo_sbus.c,v 1.28 2009/09/19 03:49:22 tsutsui Exp $");
  83
  84 #include <sys/param.h>
  85 #include <sys/systm.h>
  86 #include <sys/device.h>
  87 #include <sys/ioctl.h>
  88 #include <sys/malloc.h>
  89 #include <sys/mman.h>
  90 #include <sys/tty.h>
  91 #include <sys/conf.h>
  92
  93 #include <machine/autoconf.h>
  94 #include <machine/eeprom.h>
  95
  96 #include <dev/sbus/sbusvar.h>
  97
  98 #include <dev/sun/fbio.h>
  99 #include <dev/sun/fbvar.h>
 100 #include <dev/sun/btreg.h>
 101 #include <dev/sun/bwtworeg.h>
 102 #include <dev/sun/bwtwovar.h>
 103 #include <dev/sun/pfourreg.h>
 104
 105 /* autoconfiguration driver */
 106 static void     bwtwoattach_sbus (device_t, device_t, void *);
 107 static int      bwtwomatch_sbus (device_t, cfdata_t, void *);
 108
 109 CFATTACH_DECL_NEW(bwtwo_sbus, sizeof(struct bwtwo_softc),
 110     bwtwomatch_sbus, bwtwoattach_sbus, NULL, NULL);
 111
 112 static int      bwtwo_get_video (struct bwtwo_softc *);
 113 static void     bwtwo_set_video (struct bwtwo_softc *, int);
 114
 115 /*
 116  * Match a bwtwo.
 117  */
 118 static int
 119 bwtwomatch_sbus(device_t parent, cfdata_t cf, void *aux)
 120 {
 121         struct sbus_attach_args *sa = aux;
 122
 123         if (strcmp(cf->cf_name, sa->sa_name) == 0)
 124                 return 100;     /* beat genfb(4) */
 125
 126         return 0;
 127 }
 128
 129
 130 /*
 131  * Attach a display.  We need to notice if it is the console, too.
 132  */
 133 void
 134 bwtwoattach_sbus(device_t parent, device_t self, void *args)
 135 {
 136         struct bwtwo_softc *sc = device_private(self);
 137         struct sbus_attach_args *sa = args;
 138         struct fbdevice *fb = &sc->sc_fb;
 139         bus_space_handle_t bh;
 140         int isconsole, node;
 141         const char *name;
 142
 143         sc->sc_dev = self;
 144         node = sa->sa_node;
 145
 146         /* Remember cookies for bwtwo_mmap() */
 147         sc->sc_bustag = sa->sa_bustag;
 148         sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset);
 149
 150         fb->fb_flags = device_cfdata(self)->cf_flags;
 151         fb->fb_type.fb_depth = 1;
 152         fb_setsize_obp(fb, fb->fb_type.fb_depth, 1152, 900, node);
 153
 154         /*
 155          * When the ROM has mapped in a bwtwo display, the address
 156          * maps only the video RAM, hence we always map the control
 157          * registers ourselves.  We only need the video RAM if we are
 158          * going to print characters via rconsole.
 159          */
 160         if (sbus_bus_map(sa->sa_bustag,
 161                          sa->sa_slot,
 162                          sa->sa_offset + BWREG_REG,
 163                          sizeof(struct fbcontrol),
 164                          BUS_SPACE_MAP_LINEAR, &bh) != 0) {
 165                 aprint_error_dev(self, "cannot map control registers\n");
 166                 return;
 167         }
 168         sc->sc_reg = (struct fbcontrol *)bus_space_vaddr(sa->sa_bustag, bh);
 169         fb->fb_pfour = NULL;
 170
 171         sc->sc_pixeloffset = BWREG_MEM;
 172
 173         isconsole = fb_is_console(node);
 174         name = prom_getpropstring(node, "model");
 175
 176         /* Assume `bwtwo at sbus' only happens at sun4c's */
 177         sc->sc_get_video = bwtwo_get_video;
 178         sc->sc_set_video = bwtwo_set_video;
 179
 180         if (sa->sa_npromvaddrs != 0)
 181                 sc->sc_fb.fb_pixels = (void *)(u_long)sa->sa_promvaddrs[0];
 182         if (isconsole && sc->sc_fb.fb_pixels == NULL) {
 183                 int ramsize = fb->fb_type.fb_height * fb->fb_linebytes;
 184                 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot,
 185                                  sa->sa_offset + sc->sc_pixeloffset,
 186                                  ramsize,
 187                                  BUS_SPACE_MAP_LINEAR, &bh) != 0) {
 188                         aprint_error_dev(self, "cannot map pixels\n");
 189                         return;
 190                 }
 191                 sc->sc_fb.fb_pixels = (char *)bus_space_vaddr(sa->sa_bustag, bh);
 192         }
 193
 194         bwtwoattach(sc, name, isconsole);
 195 }
 196
 197 static void
 198 bwtwo_set_video(struct bwtwo_softc *sc, int enable)
 199 {
 200
 201         if (enable)
 202                 /*
 203                  * If the we're the console the PROM will have taken care
 204                  * of the FBC_TIMING bit and video control parameters. We
 205                  * simply turn on FBC_TIMING; in case other video parameters
 206                  * are necessary, here is a set read from an ELC:
 207                  * [0xbb,0x2b,0x4,0x14,0xae,0x3,0xa8,0x24,0x1,0x5,0xff,0x1]
 208                  */
 209                 sc->sc_reg->fbc_ctrl |= FBC_VENAB | FBC_TIMING;
 210         else
 211                 sc->sc_reg->fbc_ctrl &= ~FBC_VENAB;
 212 }
 213
 214 static int
 215 bwtwo_get_video(struct bwtwo_softc *sc)
 216 {
 217
 218         return ((sc->sc_reg->fbc_ctrl & FBC_VENAB) != 0);
 219 }