1 /* $NetBSD: genfb_sbus.c,v 1.14 2025/10/04 03:58:38 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* an SBus frontend for the generic fb console driver */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: genfb_sbus.c,v 1.14 2025/10/04 03:58:38 thorpej Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/types.h> 36 37 #include <sys/buf.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/device.h> 41 #include <sys/ioctl.h> 42 #include <sys/systm.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <machine/autoconf.h> 47 48 #include <dev/sbus/sbusvar.h> 49 #include <dev/sun/fbio.h> 50 #include <dev/sun/fbvar.h> 51 #include <dev/wsfb/genfbvar.h> 52 53 struct genfb_sbus_softc { 54 struct genfb_softc sc_gen; 55 bus_space_tag_t sc_tag; 56 paddr_t sc_paddr; 57 }; 58 59 static int genfb_match_sbus(device_t, cfdata_t, void *); 60 static void genfb_attach_sbus(device_t, device_t, void *); 61 static int genfb_ioctl_sbus(void *, void *, u_long, void *, int, 62 struct lwp*); 63 static paddr_t genfb_mmap_sbus(void *, void *, off_t, int); 64 65 CFATTACH_DECL_NEW(genfb_sbus, sizeof(struct genfb_sbus_softc), 66 genfb_match_sbus, genfb_attach_sbus, NULL, NULL); 67 68 /* 69 * Match a graphics device. 70 */ 71 static int 72 genfb_match_sbus(device_t parent, cfdata_t cf, void *aux) 73 { 74 struct sbus_attach_args *sa = aux; 75 76 /* if there's no address property we can't use the device */ 77 if (prom_getpropint(sa->sa_node, "address", -1) == -1) 78 return 0; 79 if (strcmp("display", prom_getpropstring(sa->sa_node, "device_type")) 80 == 0) 81 return 1; 82 83 return 0; 84 } 85 86 /* 87 * Attach a display. We need to notice if it is the console, too. 88 */ 89 static void 90 genfb_attach_sbus(device_t parent, device_t self, void *args) 91 { 92 struct genfb_sbus_softc *sc = device_private(self); 93 struct sbus_attach_args *sa = args; 94 static const struct genfb_ops zero_ops; 95 struct genfb_ops ops = zero_ops; 96 bus_space_handle_t bh; 97 paddr_t fbpa; 98 vaddr_t fbva; 99 int node = sa->sa_node; 100 101 aprint_normal("\n"); 102 sc->sc_gen.sc_dev = self; 103 /* Remember cookies for genfb_mmap_sbus() */ 104 sc->sc_tag = sa->sa_bustag; 105 sc->sc_paddr = sbus_bus_addr(sa->sa_bustag, sa->sa_slot, sa->sa_offset); 106 107 /* read geometry information from the device tree */ 108 sc->sc_gen.sc_width = prom_getpropint(sa->sa_node, "width", 1152); 109 sc->sc_gen.sc_height = prom_getpropint(sa->sa_node, "height", 900); 110 sc->sc_gen.sc_depth = prom_getpropint(sa->sa_node, "depth", 8); 111 sc->sc_gen.sc_stride = prom_getpropint(sa->sa_node, "linebytes", 112 (sc->sc_gen.sc_width * sc->sc_gen.sc_depth + 7) >> 3 ); 113 sc->sc_gen.sc_fbsize = sc->sc_gen.sc_height * sc->sc_gen.sc_stride; 114 fbva = (uint32_t)prom_getpropint(sa->sa_node, "address", 0); 115 if (fbva == 0) 116 panic("this fb has no address property\n"); 117 aprint_normal_dev(self, "%d x %d at %d bit\n", 118 sc->sc_gen.sc_width, sc->sc_gen.sc_height, sc->sc_gen.sc_depth); 119 120 pmap_extract(pmap_kernel(), fbva, &fbpa); 121 sc->sc_gen.sc_fboffset = (fbpa & 0x01ffffff) - 122 (sc->sc_paddr & 0x01ffffff); 123 aprint_normal_dev(self, "framebuffer at offset 0x%x\n", 124 (uint32_t)sc->sc_gen.sc_fboffset); 125 126 #if notyet 127 if (sc->sc_gen.sc_depth <= 8) { 128 /* setup some ANSIish colour map */ 129 char boo[256]; 130 snprintf(boo, 256, "\" pal!\" %x %x %x %x %x call", 131 sa->sa_node, 0, 0xa0, 0xa0, 0); 132 prom_interpret(boo); 133 } 134 #endif 135 136 device_setprop_bool(self, "is_console", fb_is_console(node)); 137 138 if (sbus_bus_map(sa->sa_bustag, 139 sa->sa_slot, 140 sa->sa_offset + sc->sc_gen.sc_fboffset, 141 sc->sc_gen.sc_fbsize, 142 BUS_SPACE_MAP_LINEAR, &bh) != 0) { 143 aprint_error_dev(self, "cannot map framebuffer\n"); 144 return; 145 } 146 sc->sc_gen.sc_fbaddr = (void *)bus_space_vaddr(sa->sa_bustag, bh); 147 148 ops.genfb_ioctl = genfb_ioctl_sbus; 149 ops.genfb_mmap = genfb_mmap_sbus; 150 151 genfb_attach(&sc->sc_gen, &ops); 152 } 153 154 static int 155 genfb_ioctl_sbus(void *v, void *vs, u_long cmd, void *data, int flag, 156 struct lwp *l) 157 { 158 159 switch (cmd) { 160 case WSDISPLAYIO_GTYPE: 161 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 162 return 0; 163 } 164 165 return EPASSTHROUGH; 166 } 167 168 static paddr_t 169 genfb_mmap_sbus(void *v, void *vs, off_t offset, int prot) 170 { 171 struct genfb_sbus_softc *sc = v; 172 173 /* regular fb mapping at 0 */ 174 if ((offset >= 0) && (offset < sc->sc_gen.sc_fbsize)) { 175 176 return bus_space_mmap(sc->sc_tag, sc->sc_paddr, 177 sc->sc_gen.sc_fboffset + offset, prot, 178 BUS_SPACE_MAP_LINEAR); 179 } 180 181 return -1; 182 } 183
Indexes created Tue Oct 14 06:10:07 GMT 2025