1 /* $NetBSD: if_le.c,v 1.36 2008/04/28 20:23:57 martin 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: if_le.c,v 1.36 2008/04/28 20:23:57 martin Exp $"); 35 36 #include "opt_inet.h" 37 #include "bpfilter.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/mbuf.h> 42 #include <sys/syslog.h> 43 #include <sys/socket.h> 44 #include <sys/device.h> 45 #include <sys/malloc.h> 46 47 #include <net/if.h> 48 #include <net/if_ether.h> 49 #include <net/if_media.h> 50 51 #include <sys/bus.h> 52 #include <sys/intr.h> 53 #include <machine/autoconf.h> 54 55 #include <dev/sbus/sbusvar.h> 56 #include <dev/sbus/lebuffervar.h> /*XXX*/ 57 58 #include <dev/ic/lancereg.h> 59 #include <dev/ic/lancevar.h> 60 #include <dev/ic/am7990reg.h> 61 #include <dev/ic/am7990var.h> 62 63 #include "ioconf.h" 64 65 /* 66 * LANCE registers. 67 */ 68 #define LEREG1_RDP 0 /* Register Data port */ 69 #define LEREG1_RAP 2 /* Register Address port */ 70 71 struct le_softc { 72 struct am7990_softc sc_am7990; /* glue to MI code */ 73 struct sbusdev sc_sd; /* sbus device */ 74 bus_space_tag_t sc_bustag; 75 bus_dma_tag_t sc_dmatag; 76 bus_dmamap_t sc_dmamap; 77 bus_space_handle_t sc_reg; 78 }; 79 80 #define MEMSIZE 0x4000 /* LANCE memory size */ 81 82 int lematch_sbus(device_t, cfdata_t, void *); 83 void leattach_sbus(device_t, device_t, void *); 84 85 /* 86 * Media types supported. 87 */ 88 static int lemedia[] = { 89 IFM_ETHER|IFM_10_5, 90 }; 91 #define NLEMEDIA __arraycount(lemedia) 92 93 CFATTACH_DECL_NEW(le_sbus, sizeof(struct le_softc), 94 lematch_sbus, leattach_sbus, NULL, NULL); 95 96 #if defined(_KERNEL_OPT) 97 #include "opt_ddb.h" 98 #endif 99 100 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t); 101 static uint16_t lerdcsr(struct lance_softc *, uint16_t); 102 103 static void 104 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) 105 { 106 struct le_softc *lesc = (struct le_softc *)sc; 107 bus_space_tag_t t = lesc->sc_bustag; 108 bus_space_handle_t h = lesc->sc_reg; 109 110 bus_space_write_2(t, h, LEREG1_RAP, port); 111 bus_space_write_2(t, h, LEREG1_RDP, val); 112 113 #if defined(SUN4M) 114 /* 115 * We need to flush the Sbus->Mbus write buffers. This can most 116 * easily be accomplished by reading back the register that we 117 * just wrote (thanks to Chris Torek for this solution). 118 */ 119 (void)bus_space_read_2(t, h, LEREG1_RDP); 120 #endif 121 } 122 123 static uint16_t 124 lerdcsr(struct lance_softc *sc, uint16_t port) 125 { 126 struct le_softc *lesc = (struct le_softc *)sc; 127 bus_space_tag_t t = lesc->sc_bustag; 128 bus_space_handle_t h = lesc->sc_reg; 129 130 bus_space_write_2(t, h, LEREG1_RAP, port); 131 return (bus_space_read_2(t, h, LEREG1_RDP)); 132 } 133 134 135 int 136 lematch_sbus(device_t parent, cfdata_t cf, void *aux) 137 { 138 struct sbus_attach_args *sa = aux; 139 140 return (strcmp(cf->cf_name, sa->sa_name) == 0); 141 } 142 143 void 144 leattach_sbus(device_t parent, device_t self, void *aux) 145 { 146 struct le_softc *lesc = device_private(self); 147 struct lance_softc *sc = &lesc->sc_am7990.lsc; 148 struct sbus_softc *sbsc = device_private(parent); 149 struct sbus_attach_args *sa = aux; 150 bus_dma_tag_t dmatag; 151 struct sbusdev *sd; 152 153 sc->sc_dev = self; 154 lesc->sc_bustag = sa->sa_bustag; 155 lesc->sc_dmatag = dmatag = sa->sa_dmatag; 156 157 if (sbus_bus_map(sa->sa_bustag, 158 sa->sa_slot, 159 sa->sa_offset, 160 sa->sa_size, 161 0, &lesc->sc_reg) != 0) { 162 aprint_error(": cannot map registers\n"); 163 return; 164 } 165 166 /* 167 * Look for an "unallocated" lebuffer and pair it with 168 * this `le' device on the assumption that we're on 169 * a pre-historic ROM that doesn't establish le<=>lebuffer 170 * parent-child relationships. 171 */ 172 for (sd = sbsc->sc_sbdev; sd != NULL; sd = sd->sd_bchain) { 173 174 struct lebuf_softc *lebuf = device_private(sd->sd_dev); 175 176 if (strncmp("lebuffer", device_xname(sd->sd_dev), 8) != 0) 177 continue; 178 179 if (lebuf->attached != 0) 180 continue; 181 182 sc->sc_mem = lebuf->sc_buffer; 183 sc->sc_memsize = lebuf->sc_bufsiz; 184 sc->sc_addr = 0; /* Lance view is offset by buffer location */ 185 lebuf->attached = 1; 186 187 /* That old black magic... */ 188 sc->sc_conf3 = prom_getpropint(sa->sa_node, 189 "busmaster-regval", 190 LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON); 191 break; 192 } 193 194 lesc->sc_sd.sd_reset = (void *)lance_reset; 195 sbus_establish(&lesc->sc_sd, self); 196 197 if (sc->sc_mem == 0) { 198 bus_dma_segment_t seg; 199 int rseg, error; 200 201 #ifndef BUS_DMA_24BIT 202 /* XXX - This flag is not defined on all archs */ 203 #define BUS_DMA_24BIT 0 204 #endif 205 /* Get a DMA handle */ 206 if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE, 0, 207 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 208 &lesc->sc_dmamap)) != 0) { 209 aprint_error(": DMA map create error %d\n", error); 210 return; 211 } 212 213 /* Allocate DMA buffer */ 214 if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, 0, 215 &seg, 1, &rseg, 216 BUS_DMA_NOWAIT|BUS_DMA_24BIT)) != 0){ 217 aprint_error(": DMA buffer allocation error %d\n", 218 error); 219 return; 220 } 221 222 /* Map DMA buffer into kernel space */ 223 if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE, 224 (void **)&sc->sc_mem, 225 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 226 aprint_error(": DMA buffer map error %d\n", error); 227 bus_dmamem_free(lesc->sc_dmatag, &seg, rseg); 228 return; 229 } 230 231 /* Load DMA buffer */ 232 if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, 233 sc->sc_mem, MEMSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 234 aprint_error(": DMA buffer map load error %d\n", error); 235 bus_dmamem_free(dmatag, &seg, rseg); 236 bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE); 237 return; 238 } 239 240 sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr & 0xffffff; 241 sc->sc_memsize = MEMSIZE; 242 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; 243 } 244 245 prom_getether(sa->sa_node, sc->sc_enaddr); 246 247 sc->sc_supmedia = lemedia; 248 sc->sc_nsupmedia = NLEMEDIA; 249 sc->sc_defaultmedia = lemedia[0]; 250 251 sc->sc_copytodesc = lance_copytobuf_contig; 252 sc->sc_copyfromdesc = lance_copyfrombuf_contig; 253 sc->sc_copytobuf = lance_copytobuf_contig; 254 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 255 sc->sc_zerobuf = lance_zerobuf_contig; 256 257 sc->sc_rdcsr = lerdcsr; 258 sc->sc_wrcsr = lewrcsr; 259 260 am7990_config(&lesc->sc_am7990); 261 262 /* Establish interrupt handler */ 263 if (sa->sa_nintr != 0) 264 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri, 265 IPL_NET, am7990_intr, sc); 266 } 267