1 /* $NetBSD: if_le.c,v 1.13 2010/01/19 22:06:21 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass, Gordon W. Ross and Wayne Knowles 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: if_le.c,v 1.13 2010/01/19 22:06:21 pooka Exp $"); 34 35 #include "opt_inet.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/syslog.h> 41 #include <sys/socket.h> 42 #include <sys/device.h> 43 44 #include <net/if.h> 45 #include <net/if_ether.h> 46 #include <net/if_media.h> 47 48 #ifdef INET 49 #include <netinet/in.h> 50 #include <netinet/if_inarp.h> 51 #endif 52 53 #include <machine/cpu.h> 54 #include <machine/mainboard.h> 55 #include <machine/autoconf.h> 56 #include <machine/bus.h> 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 /* 64 * LANCE registers. 65 */ 66 67 #define LEREG1_RDP 2 /* Offset to LANCE data register */ 68 #define LEREG1_RAP 6 /* Offset to LANCE address register */ 69 70 /* 71 * Ethernet software status per interface. 72 * The real stuff is in dev/ic/am7990var.h 73 */ 74 struct le_softc { 75 struct am7990_softc sc_am7990; /* glue to MI code */ 76 bus_space_tag_t sc_bustag; 77 bus_dma_tag_t sc_dmatag; 78 bus_space_handle_t sc_reg; /* LANCE registers */ 79 bus_dmamap_t sc_dmamap; 80 struct evcnt sc_intrcnt; /* Interrupt event counter */ 81 }; 82 83 static int le_match(device_t, cfdata_t, void *); 84 static void le_attach(device_t, device_t, void *); 85 86 CFATTACH_DECL_NEW(le, sizeof(struct le_softc), 87 le_match, le_attach, NULL, NULL); 88 89 static int le_attached; 90 91 #if defined(_KERNEL_OPT) 92 #include "opt_ddb.h" 93 #endif 94 95 #ifdef DDB 96 #define integrate 97 #define hide 98 #else 99 #define integrate static inline 100 #define hide static 101 #endif 102 103 int le_intr(void *); 104 105 hide void lewrcsr(struct lance_softc *, uint16_t, uint16_t); 106 hide uint16_t lerdcsr(struct lance_softc *, uint16_t); 107 108 hide void 109 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) 110 { 111 struct le_softc *lesc = (struct le_softc *)sc; 112 113 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port); 114 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, val); 115 } 116 117 hide uint16_t 118 lerdcsr(struct lance_softc *sc, uint16_t port) 119 { 120 struct le_softc *lesc = (struct le_softc *)sc; 121 122 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port); 123 return (bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP)); 124 } 125 126 int 127 le_match(device_t parent, cfdata_t cf, void *aux) 128 { 129 struct confargs *ca = aux; 130 int addr; 131 132 if (strcmp(ca->ca_name, "le")) 133 return 0; 134 135 if (le_attached) 136 return 0; 137 138 addr = LANCE_PORT; 139 if (badaddr((void *)addr, 1)) 140 return 0; 141 142 return 1; 143 } 144 145 #define LE_MEMSIZE (32*1024) 146 147 void 148 le_attach(device_t parent, device_t self, void *aux) 149 { 150 struct le_softc *lesc = device_private(self); 151 struct lance_softc *sc = &lesc->sc_am7990.lsc; 152 struct confargs *ca = aux; 153 154 bus_dma_tag_t dmat; 155 bus_dma_segment_t seg; 156 int rseg; 157 uint8_t *id; 158 int i; 159 void *kvaddr; 160 161 sc->sc_dev = self; 162 id = (uint8_t *)ETHER_ID; 163 lesc->sc_bustag = ca->ca_bustag; 164 dmat = lesc->sc_dmatag = ca->ca_dmatag; 165 166 if (bus_space_map(ca->ca_bustag, ca->ca_addr, 167 8, /* size */ 168 BUS_SPACE_MAP_LINEAR, 169 &lesc->sc_reg) != 0) { 170 aprint_error(": cannot map registers\n"); 171 return; 172 } 173 174 /* 175 * Allocate a physically contiguous DMA area for the chip. 176 */ 177 if (bus_dmamem_alloc(dmat, LE_MEMSIZE, 0, 0, &seg, 1, 178 &rseg, BUS_DMA_NOWAIT)) { 179 aprint_error(": can't allocate DMA area\n"); 180 return; 181 } 182 /* Map pages into kernel memory */ 183 if (bus_dmamem_map(dmat, &seg, rseg, LE_MEMSIZE, 184 &kvaddr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { 185 aprint_error(": can't map DMA area\n"); 186 bus_dmamem_free(dmat, &seg, rseg); 187 return; 188 } 189 /* Build DMA map so we can get physical address */ 190 if (bus_dmamap_create(dmat, LE_MEMSIZE, 1, LE_MEMSIZE, 191 0, BUS_DMA_NOWAIT, &lesc->sc_dmamap)) { 192 aprint_error(": can't create DMA map\n"); 193 goto bad; 194 } 195 if (bus_dmamap_load(dmat, lesc->sc_dmamap, kvaddr, LE_MEMSIZE, 196 NULL, BUS_DMA_NOWAIT)) { 197 aprint_error(": can't load DMA map\n"); 198 goto bad; 199 } 200 201 sc->sc_memsize = LE_MEMSIZE; /* 16K Buffer space*/ 202 sc->sc_mem = (void *)MIPS_PHYS_TO_KSEG1(kvaddr); 203 sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr; 204 205 sc->sc_conf3 = LE_C3_BSWP; 206 207 /* Copy Ethernet hardware address from NVRAM */ 208 for (i = 0; i < ETHER_ADDR_LEN; i++) 209 sc->sc_enaddr[i] = id[i * 4 + 3]; /* XXX */ 210 211 sc->sc_copytodesc = lance_copytobuf_contig; 212 sc->sc_copyfromdesc = lance_copyfrombuf_contig; 213 sc->sc_copytobuf = lance_copytobuf_contig; 214 sc->sc_copyfrombuf = lance_copyfrombuf_contig; 215 sc->sc_zerobuf = lance_zerobuf_contig; 216 217 sc->sc_rdcsr = lerdcsr; 218 sc->sc_wrcsr = lewrcsr; 219 sc->sc_hwinit = NULL; 220 221 evcnt_attach_dynamic(&lesc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 222 device_xname(self), "intr"); 223 bus_intr_establish(lesc->sc_bustag, SYS_INTR_ETHER, 0, 0, 224 le_intr, lesc); 225 226 am7990_config(&lesc->sc_am7990); 227 return; 228 229 bad: 230 bus_dmamem_unmap(dmat, kvaddr, LE_MEMSIZE); 231 bus_dmamem_free(dmat, &seg, rseg); 232 } 233 234 int 235 le_intr(void *arg) 236 { 237 struct le_softc *lesc = arg; 238 239 lesc->sc_intrcnt.ev_count++; 240 return am7990_intr(&lesc->sc_am7990); 241 } 242