1 /* $NetBSD: if_le.c,v 1.43 2022/09/25 18:03:04 thorpej 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 1.43 2022/09/25 18:03:04 thorpej Exp $"); 35 36 #include "opt_inet.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/mbuf.h> 41 #include <sys/syslog.h> 42 #include <sys/socket.h> 43 #include <sys/device.h> 44 45 #include <net/if.h> 46 #include <net/if_ether.h> 47 #include <net/if_media.h> 48 49 #include <sys/bus.h> 50 #include <sys/intr.h> 51 #include <machine/autoconf.h> 52 53 #include <dev/sbus/sbusvar.h> 54 #include <dev/sbus/lebuffervar.h> /*XXX*/ 55 56 #include <dev/ic/lancereg.h> 57 #include <dev/ic/lancevar.h> 58 #include <dev/ic/am7990reg.h> 59 #include <dev/ic/am7990var.h> 60 61 #include "ioconf.h" 62 63 /* 64 * LANCE registers. 65 */ 66 #define LEREG1_RDP 0 /* Register Data port */ 67 #define LEREG1_RAP 2 /* Register Address port */ 68 69 struct le_softc { 70 struct am7990_softc sc_am7990; /* glue to MI code */ 71 bus_space_tag_t sc_bustag; 72 bus_dma_tag_t sc_dmatag; 73 bus_dmamap_t sc_dmamap; 74 bus_space_handle_t sc_reg; 75 }; 76 77 #define MEMSIZE 0x4000 /* LANCE memory size */ 78 79 int lematch_sbus(device_t, cfdata_t, void *); 80 void leattach_sbus(device_t, device_t, void *); 81 82 /* 83 * Media types supported. 84 */ 85 static int lemedia[] = { 86 IFM_ETHER | IFM_10_5, 87 }; 88 #define NLEMEDIA __arraycount(lemedia) 89 90 CFATTACH_DECL_NEW(le_sbus, sizeof(struct le_softc), 91 lematch_sbus, leattach_sbus, NULL, NULL); 92 93 #if defined(_KERNEL_OPT) 94 #include "opt_ddb.h" 95 #endif 96 97 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t); 98 static uint16_t lerdcsr(struct lance_softc *, uint16_t); 99 100 static void 101 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) 102 { 103 struct le_softc *lesc = (struct le_softc *)sc; 104 bus_space_tag_t t = lesc->sc_bustag; 105 bus_space_handle_t h = lesc->sc_reg; 106 107 bus_space_write_2(t, h, LEREG1_RAP, port); 108 bus_space_write_2(t, h, LEREG1_RDP, val); 109 110 #if defined(SUN4M) 111 /* 112 * We need to flush the Sbus->Mbus write buffers. This can most 113 * easily be accomplished by reading back the register that we 114 * just wrote (thanks to Chris Torek for this solution). 115 */ 116 (void)bus_space_read_2(t, h, LEREG1_RDP); 117 #endif 118 } 119 120 static uint16_t 121 lerdcsr(struct lance_softc *sc, uint16_t port) 122 { 123 struct le_softc *lesc = (struct le_softc *)sc; 124 bus_space_tag_t t = lesc->sc_bustag; 125 bus_space_handle_t h = lesc->sc_reg; 126 127 bus_space_write_2(t, h, LEREG1_RAP, port); 128 return (bus_space_read_2(t, h, LEREG1_RDP)); 129 } 130 131 132 int 133 lematch_sbus(device_t parent, cfdata_t cf, void *aux) 134 { 135 struct sbus_attach_args *sa = aux; 136 137 return (strcmp(cf->cf_name, sa->sa_name) == 0); 138 } 139 140 void 141 leattach_sbus(device_t parent, device_t self, void *aux) 142 { 143 struct le_softc *lesc = device_private(self); 144 struct lance_softc *sc = &lesc->sc_am7990.lsc; 145 struct sbus_attach_args *sa = aux; 146 bus_dma_tag_t dmatag; 147 cfdriver_t lebufcd; 148 149 sc->sc_dev = self; 150 lesc->sc_bustag = sa->sa_bustag; 151 lesc->sc_dmatag = dmatag = sa->sa_dmatag; 152 153 if (sbus_bus_map(sa->sa_bustag, 154 sa->sa_slot, 155 sa->sa_offset, 156 sa->sa_size, 157 0, &lesc->sc_reg) != 0) { 158 aprint_error(": cannot map registers\n"); 159 return; 160 } 161 162 /* 163 * Look for an "unallocated" lebuffer and pair it with 164 * this `le' device on the assumption that we're on 165 * a pre-historic ROM that doesn't establish le<=>lebuffer 166 * parent-child relationships. 167 */ 168 lebufcd = config_cfdriver_lookup("lebuffer"); 169 if (lebufcd != NULL) { 170 int unit; 171 172 /* Check all possible lebuffer units */ 173 for (unit = 0; unit < lebufcd->cd_ndevs; unit++) { 174 device_t lebufdev; 175 struct lebuf_softc *lebufsc; 176 177 /* Check if unit is valid */ 178 lebufdev = device_lookup(lebufcd, unit); 179 if (lebufdev == NULL) 180 continue; 181 182 /* Check if we have a common sbus parent */ 183 if (parent != device_parent(lebufdev)) 184 continue; 185 lebufsc = device_private(lebufdev); 186 187 /* 188 * Check if this lebuffer unit is attached 189 * but unused by its child, if_le_lebuffer. 190 * XXX: this won't work if lebuffer is configured 191 * but not le at lebuffer? 192 */ 193 if (lebufsc->sc_buffer == 0 || lebufsc->attached != 0) 194 continue; 195 196 /* Assume this lebuffer is my pair */ 197 sc->sc_mem = lebufsc->sc_buffer; 198 sc->sc_memsize = lebufsc->sc_bufsiz; 199 200 /* Lance view is offset by buffer location */ 201 sc->sc_addr = 0; 202 203 /* Denote it */ 204 aprint_normal(" (%s)", device_xname(lebufdev)); 205 lebufsc->attached = 1; 206 207 /* That old black magic... */ 208 sc->sc_conf3 = prom_getpropint(sa->sa_node, 209 "busmaster-regval", 210 LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON); 211 break; 212 } 213 } 214 215 if (sc->sc_mem == 0) { 216 bus_dma_segment_t seg; 217 int rseg, error; 218 219 #ifndef BUS_DMA_24BIT 220 /* XXX - This flag is not defined on all archs */ 221 #define BUS_DMA_24BIT 0 222 #endif 223 /* Get a DMA handle */ 224 if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE, 0, 225 BUS_DMA_NOWAIT | BUS_DMA_24BIT, &lesc->sc_dmamap)) != 0) { 226 aprint_error(": DMA map create error %d\n", error); 227 return; 228 } 229 230 /* Allocate DMA buffer */ 231 if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, 0, 232 &seg, 1, &rseg, BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 233 aprint_error(": DMA buffer allocation error %d\n", 234 error); 235 bus_dmamap_destroy(dmatag, lesc->sc_dmamap); 236 return; 237 } 238 239 /* Map DMA buffer into kernel space */ 240 if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE, 241 (void **)&sc->sc_mem, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) 242 != 0) { 243 aprint_error(": DMA buffer map error %d\n", error); 244 bus_dmamem_free(lesc->sc_dmatag, &seg, rseg); 245 bus_dmamap_destroy(dmatag, lesc->sc_dmamap); 246 return; 247 } 248 249 /* Load DMA buffer */ 250 if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, 251 sc->sc_mem, MEMSIZE, NULL, BUS_DMA_NOWAIT)) != 0) { 252 aprint_error(": DMA buffer map load error %d\n", error); 253 bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE); 254 bus_dmamem_free(lesc->sc_dmatag, &seg, rseg); 255 bus_dmamap_destroy(dmatag, lesc->sc_dmamap); 256 return; 257 } 258 259 sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr & 0xffffff; 260 sc->sc_memsize = MEMSIZE; 261 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; 262 } 263 264 prom_getether(sa->sa_node, sc->sc_enaddr); 265 266 sc->sc_supmedia = lemedia; 267 sc->sc_nsupmedia = NLEMEDIA; 268 sc->sc_defaultmedia = lemedia[0]; 269 270 sc->sc_copytodesc = lance_copytobuf_contig; 271 sc->sc_copyfromdesc = lance_copyfrombuf_contig; 272 sc->sc_copytobuf = lance_copytobuf_contig; 273 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 274 sc->sc_zerobuf = lance_zerobuf_contig; 275 276 sc->sc_rdcsr = lerdcsr; 277 sc->sc_wrcsr = lewrcsr; 278 279 am7990_config(&lesc->sc_am7990); 280 281 /* Establish interrupt handler */ 282 if (sa->sa_nintr != 0) 283 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri, 284 IPL_NET, am7990_intr, sc); 285 } 286
Indexes created Mon Sep 22 13:09:51 GMT 2025