if_le_ioasic.c revision 1.7
1 /* $NetBSD: if_le_ioasic.c,v 1.7 1997/07/22 03:44:30 jonathan 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 int le_ioasic_match __P((struct device *, struct cfdata *, void *)); 60 void le_ioasic_attach __P((struct device *, struct device *, void *)); 61 62 hide void le_ioasic_copytobuf_gap2 __P((struct am7990_softc *, void *, 63 int, int)); 64 hide void le_ioasic_copyfrombuf_gap2 __P((struct am7990_softc *, void *, 65 int, int)); 66 67 hide void le_ioasic_copytobuf_gap16 __P((struct am7990_softc *, void *, 68 int, int)); 69 hide void le_ioasic_copyfrombuf_gap16 __P((struct am7990_softc *, void *, 70 int, int)); 71 hide void le_ioasic_zerobuf_gap16 __P((struct am7990_softc *, int, int)); 72 73 struct cfattach le_ioasic_ca = { 74 sizeof(struct le_softc), le_ioasic_match, le_ioasic_attach 75 }; 76 77 int 78 le_ioasic_match(parent, match, aux) 79 struct device *parent; 80 struct cfdata *match; 81 void *aux; 82 { 83 struct ioasicdev_attach_args *d = aux; 84 85 if (!ioasic_submatch(match, aux)) 86 return (0); 87 if (strncmp("lance", d->iada_modname, TC_ROM_LLEN)) 88 return (0); 89 90 return (1); 91 } 92 93 void 94 le_ioasic_attach(parent, self, aux) 95 struct device *parent, *self; 96 void *aux; 97 { 98 struct ioasicdev_attach_args *d = aux; 99 register struct le_softc *lesc = (void *)self; 100 register struct am7990_softc *sc = &lesc->sc_am7990; 101 102 lesc->sc_r1 = (struct lereg1 *) 103 TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr)); 104 sc->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem); 105 106 sc->sc_copytodesc = le_ioasic_copytobuf_gap2; 107 sc->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2; 108 sc->sc_copytobuf = le_ioasic_copytobuf_gap16; 109 sc->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16; 110 sc->sc_zerobuf = le_ioasic_zerobuf_gap16; 111 112 ioasic_lance_dma_setup(le_iomem); /* XXX more thought */ 113 114 dec_le_common_attach(sc, ioasic_lance_ether_address()); 115 116 ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET, 117 am7990_intr, sc); 118 } 119 120 /* 121 * Special memory access functions needed by ioasic-attached LANCE 122 * chips. 123 */ 124 125 /* 126 * gap2: two bytes of data followed by two bytes of pad. 127 * 128 * Buffers must be 4-byte aligned. The code doesn't worry about 129 * doing an extra byte. 130 */ 131 132 void 133 le_ioasic_copytobuf_gap2(sc, fromv, boff, len) 134 struct am7990_softc *sc; 135 void *fromv; 136 int boff; 137 register int len; 138 { 139 volatile caddr_t buf = sc->sc_mem; 140 register caddr_t from = fromv; 141 register volatile u_int16_t *bptr; 142 143 if (boff & 0x1) { 144 /* handle unaligned first byte */ 145 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 146 *bptr = (*from++ << 8) | (*bptr & 0xff); 147 bptr += 2; 148 len--; 149 } else 150 bptr = ((volatile u_int16_t *)buf) + boff; 151 while (len > 1) { 152 *bptr = (from[1] << 8) | (from[0] & 0xff); 153 bptr += 2; 154 from += 2; 155 len -= 2; 156 } 157 if (len == 1) 158 *bptr = (u_int16_t)*from; 159 } 160 161 void 162 le_ioasic_copyfrombuf_gap2(sc, tov, boff, len) 163 struct am7990_softc *sc; 164 void *tov; 165 int boff, len; 166 { 167 volatile caddr_t buf = sc->sc_mem; 168 register caddr_t to = tov; 169 register volatile u_int16_t *bptr; 170 register u_int16_t tmp; 171 172 if (boff & 0x1) { 173 /* handle unaligned first byte */ 174 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 175 *to++ = (*bptr >> 8) & 0xff; 176 bptr += 2; 177 len--; 178 } else 179 bptr = ((volatile u_int16_t *)buf) + boff; 180 while (len > 1) { 181 tmp = *bptr; 182 *to++ = tmp & 0xff; 183 *to++ = (tmp >> 8) & 0xff; 184 bptr += 2; 185 len -= 2; 186 } 187 if (len == 1) 188 *to = *bptr & 0xff; 189 } 190 191 /* 192 * gap16: 16 bytes of data followed by 16 bytes of pad. 193 * 194 * Buffers must be 32-byte aligned. 195 */ 196 197 void 198 le_ioasic_copytobuf_gap16(sc, fromv, boff, len) 199 struct am7990_softc *sc; 200 void *fromv; 201 int boff; 202 register int len; 203 { 204 volatile caddr_t buf = sc->sc_mem; 205 register caddr_t from = fromv; 206 register caddr_t bptr; 207 register int xfer; 208 209 bptr = buf + ((boff << 1) & ~0x1f); 210 boff &= 0xf; 211 xfer = min(len, 16 - boff); 212 while (len > 0) { 213 bcopy(from, bptr + boff, xfer); 214 from += xfer; 215 bptr += 32; 216 boff = 0; 217 len -= xfer; 218 xfer = min(len, 16); 219 } 220 } 221 222 void 223 le_ioasic_copyfrombuf_gap16(sc, tov, boff, len) 224 struct am7990_softc *sc; 225 void *tov; 226 int boff, len; 227 { 228 volatile caddr_t buf = sc->sc_mem; 229 register caddr_t to = tov; 230 register caddr_t bptr; 231 register int xfer; 232 233 bptr = buf + ((boff << 1) & ~0x1f); 234 boff &= 0xf; 235 xfer = min(len, 16 - boff); 236 while (len > 0) { 237 bcopy(bptr + boff, to, xfer); 238 to += xfer; 239 bptr += 32; 240 boff = 0; 241 len -= xfer; 242 xfer = min(len, 16); 243 } 244 } 245 246 void 247 le_ioasic_zerobuf_gap16(sc, boff, len) 248 struct am7990_softc *sc; 249 int boff, len; 250 { 251 volatile caddr_t buf = sc->sc_mem; 252 register caddr_t bptr; 253 register int xfer; 254 255 bptr = buf + ((boff << 1) & ~0x1f); 256 boff &= 0xf; 257 xfer = min(len, 16 - boff); 258 while (len > 0) { 259 bzero(bptr + boff, xfer); 260 bptr += 32; 261 boff = 0; 262 len -= xfer; 263 xfer = min(len, 16); 264 } 265 } 266
Indexes created Tue Sep 30 20:09:53 GMT 2025