bwtwo_sbus.c revision 1.30
1/* $NetBSD: bwtwo_sbus.c,v 1.30 2022/09/25 18:03:04 thorpej 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 1.30 2022/09/25 18:03:04 thorpej 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/mman.h> 89#include <sys/tty.h> 90#include <sys/conf.h> 91 92#include <machine/autoconf.h> 93#include <machine/eeprom.h> 94 95#include <dev/sbus/sbusvar.h> 96 97#include <dev/sun/fbio.h> 98#include <dev/sun/fbvar.h> 99#include <dev/sun/btreg.h> 100#include <dev/sun/bwtworeg.h> 101#include <dev/sun/bwtwovar.h> 102#include <dev/sun/pfourreg.h> 103 104/* autoconfiguration driver */ 105static void bwtwoattach_sbus (device_t, device_t, void *); 106static int bwtwomatch_sbus (device_t, cfdata_t, void *); 107 108CFATTACH_DECL_NEW(bwtwo_sbus, sizeof(struct bwtwo_softc), 109 bwtwomatch_sbus, bwtwoattach_sbus, NULL, NULL); 110 111static int bwtwo_get_video (struct bwtwo_softc *); 112static void bwtwo_set_video (struct bwtwo_softc *, int); 113 114/* 115 * Match a bwtwo. 116 */ 117static int 118bwtwomatch_sbus(device_t parent, cfdata_t cf, void *aux) 119{ 120 struct sbus_attach_args *sa = aux; 121 122 if (strcmp(cf->cf_name, sa->sa_name) == 0) 123 return 100; /* beat genfb(4) */ 124 125 return 0; 126} 127 128 129/* 130 * Attach a display. We need to notice if it is the console, too. 131 */ 132void 133bwtwoattach_sbus(device_t parent, device_t self, void *args) 134{ 135 struct bwtwo_softc *sc = device_private(self); 136 struct sbus_attach_args *sa = args; 137 struct fbdevice *fb = &sc->sc_fb; 138 bus_space_handle_t bh; 139 int isconsole, node; 140 const char *name; 141 142 sc->sc_dev = self; 143 node = sa->sa_node; 144 145 /* Remember cookies for bwtwo_mmap() */ 146 sc->sc_bustag = sa->sa_bustag; 147 sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset); 148 149 fb->fb_flags = device_cfdata(self)->cf_flags; 150 fb->fb_type.fb_depth = 1; 151 fb_setsize_obp(fb, fb->fb_type.fb_depth, 1152, 900, node); 152 153 /* 154 * When the ROM has mapped in a bwtwo display, the address 155 * maps only the video RAM, hence we always map the control 156 * registers ourselves. We only need the video RAM if we are 157 * going to print characters via rconsole. 158 */ 159 if (sbus_bus_map(sa->sa_bustag, 160 sa->sa_slot, 161 sa->sa_offset + BWREG_REG, 162 sizeof(struct fbcontrol), 163 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 164 aprint_error_dev(self, "cannot map control registers\n"); 165 return; 166 } 167 sc->sc_reg = (struct fbcontrol *)bus_space_vaddr(sa->sa_bustag, bh); 168 fb->fb_pfour = NULL; 169 170 sc->sc_pixeloffset = BWREG_MEM; 171 172 isconsole = fb_is_console(node); 173 name = prom_getpropstring(node, "model"); 174 175 /* Assume `bwtwo at sbus' only happens at sun4c's */ 176 sc->sc_get_video = bwtwo_get_video; 177 sc->sc_set_video = bwtwo_set_video; 178 179 if (sa->sa_npromvaddrs != 0) 180 sc->sc_fb.fb_pixels = (void *)(u_long)sa->sa_promvaddrs[0]; 181 if (isconsole && sc->sc_fb.fb_pixels == NULL) { 182 int ramsize = fb->fb_type.fb_height * fb->fb_linebytes; 183 if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, 184 sa->sa_offset + sc->sc_pixeloffset, 185 ramsize, 186 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 187 aprint_error_dev(self, "cannot map pixels\n"); 188 return; 189 } 190 sc->sc_fb.fb_pixels = (char *)bus_space_vaddr(sa->sa_bustag, bh); 191 } 192 193 bwtwoattach(sc, name, isconsole); 194} 195 196static void 197bwtwo_set_video(struct bwtwo_softc *sc, int enable) 198{ 199 200 if (enable) 201 /* 202 * If the we're the console the PROM will have taken care 203 * of the FBC_TIMING bit and video control parameters. We 204 * simply turn on FBC_TIMING; in case other video parameters 205 * are necessary, here is a set read from an ELC: 206 * [0xbb,0x2b,0x4,0x14,0xae,0x3,0xa8,0x24,0x1,0x5,0xff,0x1] 207 */ 208 sc->sc_reg->fbc_ctrl |= FBC_VENAB | FBC_TIMING; 209 else 210 sc->sc_reg->fbc_ctrl &= ~FBC_VENAB; 211} 212 213static int 214bwtwo_get_video(struct bwtwo_softc *sc) 215{ 216 217 return ((sc->sc_reg->fbc_ctrl & FBC_VENAB) != 0); 218} 219