bwtwo_sbus.c revision 1.21
1/* $NetBSD: bwtwo_sbus.c,v 1.21 2008/04/28 20:23:57 martin 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 1.21 2008/04/28 20:23:57 martin 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 */ 106static void bwtwoattach_sbus (struct device *, struct device *, void *); 107static int bwtwomatch_sbus (struct device *, struct cfdata *, void *); 108 109/* Allocate an `sbusdev' in addition to the bwtwo softc */ 110struct bwtwo_sbus_softc { 111 struct bwtwo_softc bss_softc; 112 struct sbusdev bss_sd; 113}; 114 115CFATTACH_DECL(bwtwo_sbus, sizeof(struct bwtwo_sbus_softc), 116 bwtwomatch_sbus, bwtwoattach_sbus, NULL, NULL); 117 118static int bwtwo_get_video (struct bwtwo_softc *); 119static void bwtwo_set_video (struct bwtwo_softc *, int); 120 121/* 122 * Match a bwtwo. 123 */ 124static int 125bwtwomatch_sbus(parent, cf, aux) 126 struct device *parent; 127 struct cfdata *cf; 128 void *aux; 129{ 130 struct sbus_attach_args *sa = aux; 131 132 return (strcmp(cf->cf_name, sa->sa_name) == 0); 133} 134 135 136/* 137 * Attach a display. We need to notice if it is the console, too. 138 */ 139void 140bwtwoattach_sbus(parent, self, args) 141 struct device *parent, *self; 142 void *args; 143{ 144 struct bwtwo_softc *sc = (struct bwtwo_softc *)self; 145 struct sbusdev *sd = &((struct bwtwo_sbus_softc *)self)->bss_sd; 146 struct sbus_attach_args *sa = args; 147 struct fbdevice *fb = &sc->sc_fb; 148 bus_space_handle_t bh; 149 int isconsole, node; 150 const char *name; 151 152 node = sa->sa_node; 153 154 /* Remember cookies for bwtwo_mmap() */ 155 sc->sc_bustag = sa->sa_bustag; 156 sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset); 157 158 fb->fb_flags = device_cfdata(&sc->sc_dev)->cf_flags; 159 fb->fb_type.fb_depth = 1; 160 fb_setsize_obp(fb, fb->fb_type.fb_depth, 1152, 900, node); 161 162 /* 163 * When the ROM has mapped in a bwtwo display, the address 164 * maps only the video RAM, hence we always map the control 165 * registers ourselves. We only need the video RAM if we are 166 * going to print characters via rconsole. 167 */ 168 if (sbus_bus_map(sa->sa_bustag, 169 sa->sa_slot, 170 sa->sa_offset + BWREG_REG, 171 sizeof(struct fbcontrol), 172 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 173 aprint_error_dev(self, "cannot map control registers\n"); 174 return; 175 } 176 sc->sc_reg = (struct fbcontrol *)bus_space_vaddr(sa->sa_bustag, bh); 177 fb->fb_pfour = NULL; 178 179 sc->sc_pixeloffset = BWREG_MEM; 180 181 isconsole = fb_is_console(node); 182 name = prom_getpropstring(node, "model"); 183 184 /* Assume `bwtwo at sbus' only happens at sun4c's */ 185 sc->sc_get_video = bwtwo_get_video; 186 sc->sc_set_video = bwtwo_set_video; 187 188 if (sa->sa_npromvaddrs != 0) 189 sc->sc_fb.fb_pixels = (void *)(u_long)sa->sa_promvaddrs[0]; 190 if (isconsole && sc->sc_fb.fb_pixels == NULL) { 191 int ramsize = fb->fb_type.fb_height * fb->fb_linebytes; 192 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, 193 sa->sa_offset + sc->sc_pixeloffset, 194 ramsize, 195 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 196 aprint_error_dev(self, "cannot map pixels\n"); 197 return; 198 } 199 sc->sc_fb.fb_pixels = (char *)bus_space_vaddr(sa->sa_bustag, bh); 200 } 201 202 sbus_establish(sd, &sc->sc_dev); 203 bwtwoattach(sc, name, isconsole); 204} 205 206static void 207bwtwo_set_video(sc, enable) 208 struct bwtwo_softc *sc; 209 int enable; 210{ 211 212 if (enable) 213 /* 214 * If the we're the console the PROM will have taken care 215 * of the FBC_TIMING bit and video control parameters. We 216 * simply turn on FBC_TIMING; in case other video parameters 217 * are necessary, here is a set read from an ELC: 218 * [0xbb,0x2b,0x4,0x14,0xae,0x3,0xa8,0x24,0x1,0x5,0xff,0x1] 219 */ 220 sc->sc_reg->fbc_ctrl |= FBC_VENAB | FBC_TIMING; 221 else 222 sc->sc_reg->fbc_ctrl &= ~FBC_VENAB; 223} 224 225static int 226bwtwo_get_video(sc) 227 struct bwtwo_softc *sc; 228{ 229 230 return ((sc->sc_reg->fbc_ctrl & FBC_VENAB) != 0); 231} 232