bwtwo_sbus.c revision 1.22
1/* $NetBSD: bwtwo_sbus.c,v 1.22 2009/03/14 15:36:20 dsl 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 1.22 2009/03/14 15:36:20 dsl 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(struct device *parent, struct cfdata *cf, void *aux) 126{ 127 struct sbus_attach_args *sa = aux; 128 129 return (strcmp(cf->cf_name, sa->sa_name) == 0); 130} 131 132 133/* 134 * Attach a display. We need to notice if it is the console, too. 135 */ 136void 137bwtwoattach_sbus(parent, self, args) 138 struct device *parent, *self; 139 void *args; 140{ 141 struct bwtwo_softc *sc = (struct bwtwo_softc *)self; 142 struct sbusdev *sd = &((struct bwtwo_sbus_softc *)self)->bss_sd; 143 struct sbus_attach_args *sa = args; 144 struct fbdevice *fb = &sc->sc_fb; 145 bus_space_handle_t bh; 146 int isconsole, node; 147 const char *name; 148 149 node = sa->sa_node; 150 151 /* Remember cookies for bwtwo_mmap() */ 152 sc->sc_bustag = sa->sa_bustag; 153 sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset); 154 155 fb->fb_flags = device_cfdata(&sc->sc_dev)->cf_flags; 156 fb->fb_type.fb_depth = 1; 157 fb_setsize_obp(fb, fb->fb_type.fb_depth, 1152, 900, node); 158 159 /* 160 * When the ROM has mapped in a bwtwo display, the address 161 * maps only the video RAM, hence we always map the control 162 * registers ourselves. We only need the video RAM if we are 163 * going to print characters via rconsole. 164 */ 165 if (sbus_bus_map(sa->sa_bustag, 166 sa->sa_slot, 167 sa->sa_offset + BWREG_REG, 168 sizeof(struct fbcontrol), 169 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 170 aprint_error_dev(self, "cannot map control registers\n"); 171 return; 172 } 173 sc->sc_reg = (struct fbcontrol *)bus_space_vaddr(sa->sa_bustag, bh); 174 fb->fb_pfour = NULL; 175 176 sc->sc_pixeloffset = BWREG_MEM; 177 178 isconsole = fb_is_console(node); 179 name = prom_getpropstring(node, "model"); 180 181 /* Assume `bwtwo at sbus' only happens at sun4c's */ 182 sc->sc_get_video = bwtwo_get_video; 183 sc->sc_set_video = bwtwo_set_video; 184 185 if (sa->sa_npromvaddrs != 0) 186 sc->sc_fb.fb_pixels = (void *)(u_long)sa->sa_promvaddrs[0]; 187 if (isconsole && sc->sc_fb.fb_pixels == NULL) { 188 int ramsize = fb->fb_type.fb_height * fb->fb_linebytes; 189 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, 190 sa->sa_offset + sc->sc_pixeloffset, 191 ramsize, 192 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 193 aprint_error_dev(self, "cannot map pixels\n"); 194 return; 195 } 196 sc->sc_fb.fb_pixels = (char *)bus_space_vaddr(sa->sa_bustag, bh); 197 } 198 199 sbus_establish(sd, &sc->sc_dev); 200 bwtwoattach(sc, name, isconsole); 201} 202 203static void 204bwtwo_set_video(struct bwtwo_softc *sc, int enable) 205{ 206 207 if (enable) 208 /* 209 * If the we're the console the PROM will have taken care 210 * of the FBC_TIMING bit and video control parameters. We 211 * simply turn on FBC_TIMING; in case other video parameters 212 * are necessary, here is a set read from an ELC: 213 * [0xbb,0x2b,0x4,0x14,0xae,0x3,0xa8,0x24,0x1,0x5,0xff,0x1] 214 */ 215 sc->sc_reg->fbc_ctrl |= FBC_VENAB | FBC_TIMING; 216 else 217 sc->sc_reg->fbc_ctrl &= ~FBC_VENAB; 218} 219 220static int 221bwtwo_get_video(struct bwtwo_softc *sc) 222{ 223 224 return ((sc->sc_reg->fbc_ctrl & FBC_VENAB) != 0); 225} 226