if_le_ioasic.c revision 1.6
1 /* $NetBSD: if_le_ioasic.c,v 1.6 1997/03/17 03:19:13 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 /* 31 * LANCE on DEC IOCTL ASIC. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/syslog.h> 38 #include <sys/socket.h> 39 #include <sys/device.h> 40 41 #include <net/if.h> 42 #include <net/if_ether.h> 43 #include <net/if_media.h> 44 45 #ifdef INET 46 #include <netinet/in.h> 47 #include <netinet/if_inarp.h> 48 #endif 49 50 #include <dev/ic/am7990reg.h> 51 #include <dev/ic/am7990var.h> 52 53 #include <dev/tc/if_levar.h> 54 #include <dev/tc/tcvar.h> 55 #include <dev/tc/ioasicvar.h> 56 57 extern caddr_t le_iomem; 58 59 #ifdef __BROKEN_INDIRECT_CONFIG 60 int le_ioasic_match __P((struct device *, void *, void *)); 61 #else 62 int le_ioasic_match __P((struct device *, struct cfdata *, void *)); 63 #endif 64 void le_ioasic_attach __P((struct device *, struct device *, void *)); 65 66 hide void le_ioasic_copytobuf_gap2 __P((struct am7990_softc *, void *, 67 int, int)); 68 hide void le_ioasic_copyfrombuf_gap2 __P((struct am7990_softc *, void *, 69 int, int)); 70 71 hide void le_ioasic_copytobuf_gap16 __P((struct am7990_softc *, void *, 72 int, int)); 73 hide void le_ioasic_copyfrombuf_gap16 __P((struct am7990_softc *, void *, 74 int, int)); 75 hide void le_ioasic_zerobuf_gap16 __P((struct am7990_softc *, int, int)); 76 77 struct cfattach le_ioasic_ca = { 78 sizeof(struct le_softc), le_ioasic_match, le_ioasic_attach 79 }; 80 81 int 82 le_ioasic_match(parent, match, aux) 83 struct device *parent; 84 #ifdef __BROKEN_INDIRECT_CONFIG 85 void *match; 86 #else 87 struct cfdata *match; 88 #endif 89 void *aux; 90 { 91 struct ioasicdev_attach_args *d = aux; 92 93 if (!ioasic_submatch(match, aux)) 94 return (0); 95 if (strncmp("lance", d->iada_modname, TC_ROM_LLEN)) 96 return (0); 97 98 return (1); 99 } 100 101 void 102 le_ioasic_attach(parent, self, aux) 103 struct device *parent, *self; 104 void *aux; 105 { 106 struct ioasicdev_attach_args *d = aux; 107 register struct le_softc *lesc = (void *)self; 108 register struct am7990_softc *sc = &lesc->sc_am7990; 109 110 lesc->sc_r1 = (struct lereg1 *) 111 TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr)); 112 sc->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem); 113 114 sc->sc_copytodesc = le_ioasic_copytobuf_gap2; 115 sc->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2; 116 sc->sc_copytobuf = le_ioasic_copytobuf_gap16; 117 sc->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16; 118 sc->sc_zerobuf = le_ioasic_zerobuf_gap16; 119 120 ioasic_lance_dma_setup(le_iomem); /* XXX more thought */ 121 122 dec_le_common_attach(sc, ioasic_lance_ether_address()); 123 124 ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET, 125 am7990_intr, sc); 126 } 127 128 /* 129 * Special memory access functions needed by ioasic-attached LANCE 130 * chips. 131 */ 132 133 /* 134 * gap2: two bytes of data followed by two bytes of pad. 135 * 136 * Buffers must be 4-byte aligned. The code doesn't worry about 137 * doing an extra byte. 138 */ 139 140 void 141 le_ioasic_copytobuf_gap2(sc, fromv, boff, len) 142 struct am7990_softc *sc; 143 void *fromv; 144 int boff; 145 register int len; 146 { 147 volatile caddr_t buf = sc->sc_mem; 148 register caddr_t from = fromv; 149 register volatile u_int16_t *bptr; 150 151 if (boff & 0x1) { 152 /* handle unaligned first byte */ 153 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 154 *bptr = (*from++ << 8) | (*bptr & 0xff); 155 bptr += 2; 156 len--; 157 } else 158 bptr = ((volatile u_int16_t *)buf) + boff; 159 while (len > 1) { 160 *bptr = (from[1] << 8) | (from[0] & 0xff); 161 bptr += 2; 162 from += 2; 163 len -= 2; 164 } 165 if (len == 1) 166 *bptr = (u_int16_t)*from; 167 } 168 169 void 170 le_ioasic_copyfrombuf_gap2(sc, tov, boff, len) 171 struct am7990_softc *sc; 172 void *tov; 173 int boff, len; 174 { 175 volatile caddr_t buf = sc->sc_mem; 176 register caddr_t to = tov; 177 register volatile u_int16_t *bptr; 178 register u_int16_t tmp; 179 180 if (boff & 0x1) { 181 /* handle unaligned first byte */ 182 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 183 *to++ = (*bptr >> 8) & 0xff; 184 bptr += 2; 185 len--; 186 } else 187 bptr = ((volatile u_int16_t *)buf) + boff; 188 while (len > 1) { 189 tmp = *bptr; 190 *to++ = tmp & 0xff; 191 *to++ = (tmp >> 8) & 0xff; 192 bptr += 2; 193 len -= 2; 194 } 195 if (len == 1) 196 *to = *bptr & 0xff; 197 } 198 199 /* 200 * gap16: 16 bytes of data followed by 16 bytes of pad. 201 * 202 * Buffers must be 32-byte aligned. 203 */ 204 205 void 206 le_ioasic_copytobuf_gap16(sc, fromv, boff, len) 207 struct am7990_softc *sc; 208 void *fromv; 209 int boff; 210 register int len; 211 { 212 volatile caddr_t buf = sc->sc_mem; 213 register caddr_t from = fromv; 214 register caddr_t bptr; 215 register int xfer; 216 217 bptr = buf + ((boff << 1) & ~0x1f); 218 boff &= 0xf; 219 xfer = min(len, 16 - boff); 220 while (len > 0) { 221 bcopy(from, bptr + boff, xfer); 222 from += xfer; 223 bptr += 32; 224 boff = 0; 225 len -= xfer; 226 xfer = min(len, 16); 227 } 228 } 229 230 void 231 le_ioasic_copyfrombuf_gap16(sc, tov, boff, len) 232 struct am7990_softc *sc; 233 void *tov; 234 int boff, len; 235 { 236 volatile caddr_t buf = sc->sc_mem; 237 register caddr_t to = tov; 238 register caddr_t bptr; 239 register int xfer; 240 241 bptr = buf + ((boff << 1) & ~0x1f); 242 boff &= 0xf; 243 xfer = min(len, 16 - boff); 244 while (len > 0) { 245 bcopy(bptr + boff, to, xfer); 246 to += xfer; 247 bptr += 32; 248 boff = 0; 249 len -= xfer; 250 xfer = min(len, 16); 251 } 252 } 253 254 void 255 le_ioasic_zerobuf_gap16(sc, boff, len) 256 struct am7990_softc *sc; 257 int boff, len; 258 { 259 volatile caddr_t buf = sc->sc_mem; 260 register caddr_t bptr; 261 register int xfer; 262 263 bptr = buf + ((boff << 1) & ~0x1f); 264 boff &= 0xf; 265 xfer = min(len, 16 - boff); 266 while (len > 0) { 267 bzero(bptr + boff, xfer); 268 bptr += 32; 269 boff = 0; 270 len -= xfer; 271 xfer = min(len, 16); 272 } 273 } 274
Indexes created Tue Sep 30 07:10:03 GMT 2025