1 /* $NetBSD: if_le.c,v 1.35 2008/04/04 12:25:07 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace 9 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: if_le.c,v 1.35 2008/04/04 12:25:07 tsutsui Exp $"); 42 43 #include "opt_inet.h" 44 #include "bpfilter.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/mbuf.h> 49 #include <sys/syslog.h> 50 #include <sys/socket.h> 51 #include <sys/device.h> 52 #include <sys/malloc.h> 53 54 #include <net/if.h> 55 #include <net/if_ether.h> 56 #include <net/if_media.h> 57 58 #include <sys/bus.h> 59 #include <sys/intr.h> 60 #include <machine/autoconf.h> 61 62 #include <dev/sbus/sbusvar.h> 63 #include <dev/sbus/lebuffervar.h> /*XXX*/ 64 65 #include <dev/ic/lancereg.h> 66 #include <dev/ic/lancevar.h> 67 #include <dev/ic/am7990reg.h> 68 #include <dev/ic/am7990var.h> 69 70 #include "ioconf.h" 71 72 /* 73 * LANCE registers. 74 */ 75 #define LEREG1_RDP 0 /* Register Data port */ 76 #define LEREG1_RAP 2 /* Register Address port */ 77 78 struct le_softc { 79 struct am7990_softc sc_am7990; /* glue to MI code */ 80 struct sbusdev sc_sd; /* sbus device */ 81 bus_space_tag_t sc_bustag; 82 bus_dma_tag_t sc_dmatag; 83 bus_dmamap_t sc_dmamap; 84 bus_space_handle_t sc_reg; 85 }; 86 87 #define MEMSIZE 0x4000 /* LANCE memory size */ 88 89 int lematch_sbus(device_t, cfdata_t, void *); 90 void leattach_sbus(device_t, device_t, void *); 91 92 /* 93 * Media types supported. 94 */ 95 static int lemedia[] = { 96 IFM_ETHER|IFM_10_5, 97 }; 98 #define NLEMEDIA __arraycount(lemedia) 99 100 CFATTACH_DECL_NEW(le_sbus, sizeof(struct le_softc), 101 lematch_sbus, leattach_sbus, NULL, NULL); 102 103 #if defined(_KERNEL_OPT) 104 #include "opt_ddb.h" 105 #endif 106 107 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t); 108 static uint16_t lerdcsr(struct lance_softc *, uint16_t); 109 110 static void 111 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) 112 { 113 struct le_softc *lesc = (struct le_softc *)sc; 114 bus_space_tag_t t = lesc->sc_bustag; 115 bus_space_handle_t h = lesc->sc_reg; 116 117 bus_space_write_2(t, h, LEREG1_RAP, port); 118 bus_space_write_2(t, h, LEREG1_RDP, val); 119 120 #if defined(SUN4M) 121 /* 122 * We need to flush the Sbus->Mbus write buffers. This can most 123 * easily be accomplished by reading back the register that we 124 * just wrote (thanks to Chris Torek for this solution). 125 */ 126 (void)bus_space_read_2(t, h, LEREG1_RDP); 127 #endif 128 } 129 130 static uint16_t 131 lerdcsr(struct lance_softc *sc, uint16_t port) 132 { 133 struct le_softc *lesc = (struct le_softc *)sc; 134 bus_space_tag_t t = lesc->sc_bustag; 135 bus_space_handle_t h = lesc->sc_reg; 136 137 bus_space_write_2(t, h, LEREG1_RAP, port); 138 return (bus_space_read_2(t, h, LEREG1_RDP)); 139 } 140 141 142 int 143 lematch_sbus(device_t parent, cfdata_t cf, void *aux) 144 { 145 struct sbus_attach_args *sa = aux; 146 147 return (strcmp(cf->cf_name, sa->sa_name) == 0); 148 } 149 150 void 151 leattach_sbus(device_t parent, device_t self, void *aux) 152 { 153 struct le_softc *lesc = device_private(self); 154 struct lance_softc *sc = &lesc->sc_am7990.lsc; 155 struct sbus_softc *sbsc = device_private(parent); 156 struct sbus_attach_args *sa = aux; 157 bus_dma_tag_t dmatag; 158 struct sbusdev *sd; 159 160 sc->sc_dev = self; 161 lesc->sc_bustag = sa->sa_bustag; 162 lesc->sc_dmatag = dmatag = sa->sa_dmatag; 163 164 if (sbus_bus_map(sa->sa_bustag, 165 sa->sa_slot, 166 sa->sa_offset, 167 sa->sa_size, 168 0, &lesc->sc_reg) != 0) { 169 aprint_error(": cannot map registers\n"); 170 return; 171 } 172 173 /* 174 * Look for an "unallocated" lebuffer and pair it with 175 * this `le' device on the assumption that we're on 176 * a pre-historic ROM that doesn't establish le<=>lebuffer 177 * parent-child relationships. 178 */ 179 for (sd = sbsc->sc_sbdev; sd != NULL; sd = sd->sd_bchain) { 180 181 struct lebuf_softc *lebuf = device_private(sd->sd_dev); 182 183 if (strncmp("lebuffer", device_xname(sd->sd_dev), 8) != 0) 184 continue; 185 186 if (lebuf->attached != 0) 187 continue; 188 189 sc->sc_mem = lebuf->sc_buffer; 190 sc->sc_memsize = lebuf->sc_bufsiz; 191 sc->sc_addr = 0; /* Lance view is offset by buffer location */ 192 lebuf->attached = 1; 193 194 /* That old black magic... */ 195 sc->sc_conf3 = prom_getpropint(sa->sa_node, 196 "busmaster-regval", 197 LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON); 198 break; 199 } 200 201 lesc->sc_sd.sd_reset = (void *)lance_reset; 202 sbus_establish(&lesc->sc_sd, self); 203 204 if (sc->sc_mem == 0) { 205 bus_dma_segment_t seg; 206 int rseg, error; 207 208 #ifndef BUS_DMA_24BIT 209 /* XXX - This flag is not defined on all archs */ 210 #define BUS_DMA_24BIT 0 211 #endif 212 /* Get a DMA handle */ 213 if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE, 0, 214 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 215 &lesc->sc_dmamap)) != 0) { 216 aprint_error(": DMA map create error %d\n", error); 217 return; 218 } 219 220 /* Allocate DMA buffer */ 221 if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, 0, 222 &seg, 1, &rseg, 223 BUS_DMA_NOWAIT|BUS_DMA_24BIT)) != 0){ 224 aprint_error(": DMA buffer allocation error %d\n", 225 error); 226 return; 227 } 228 229 /* Map DMA buffer into kernel space */ 230 if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE, 231 (void **)&sc->sc_mem, 232 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 233 aprint_error(": DMA buffer map error %d\n", error); 234 bus_dmamem_free(lesc->sc_dmatag, &seg, rseg); 235 return; 236 } 237 238 /* Load DMA buffer */ 239 if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, 240 sc->sc_mem, MEMSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 241 aprint_error(": DMA buffer map load error %d\n", error); 242 bus_dmamem_free(dmatag, &seg, rseg); 243 bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE); 244 return; 245 } 246 247 sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr & 0xffffff; 248 sc->sc_memsize = MEMSIZE; 249 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; 250 } 251 252 prom_getether(sa->sa_node, sc->sc_enaddr); 253 254 sc->sc_supmedia = lemedia; 255 sc->sc_nsupmedia = NLEMEDIA; 256 sc->sc_defaultmedia = lemedia[0]; 257 258 sc->sc_copytodesc = lance_copytobuf_contig; 259 sc->sc_copyfromdesc = lance_copyfrombuf_contig; 260 sc->sc_copytobuf = lance_copytobuf_contig; 261 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 262 sc->sc_zerobuf = lance_zerobuf_contig; 263 264 sc->sc_rdcsr = lerdcsr; 265 sc->sc_wrcsr = lewrcsr; 266 267 am7990_config(&lesc->sc_am7990); 268 269 /* Establish interrupt handler */ 270 if (sa->sa_nintr != 0) 271 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri, 272 IPL_NET, am7990_intr, sc); 273 } 274