if_le_ioasic.c revision 1.5
1 /* $NetBSD: if_le_ioasic.c,v 1.5 1997/03/15 21:06:12 cgd 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 44 #ifdef INET 45 #include <netinet/in.h> 46 #include <netinet/if_inarp.h> 47 #endif 48 49 #include <dev/ic/am7990reg.h> 50 #include <dev/ic/am7990var.h> 51 52 #include <dev/tc/if_levar.h> 53 #include <dev/tc/tcvar.h> 54 #include <dev/tc/ioasicvar.h> 55 56 extern caddr_t le_iomem; 57 58 #ifdef __BROKEN_INDIRECT_CONFIG 59 int le_ioasic_match __P((struct device *, void *, void *)); 60 #else 61 int le_ioasic_match __P((struct device *, struct cfdata *, void *)); 62 #endif 63 void le_ioasic_attach __P((struct device *, struct device *, void *)); 64 65 hide void le_ioasic_copytobuf_gap2 __P((struct am7990_softc *, void *, 66 int, int)); 67 hide void le_ioasic_copyfrombuf_gap2 __P((struct am7990_softc *, void *, 68 int, int)); 69 70 hide void le_ioasic_copytobuf_gap16 __P((struct am7990_softc *, void *, 71 int, int)); 72 hide void le_ioasic_copyfrombuf_gap16 __P((struct am7990_softc *, void *, 73 int, int)); 74 hide void le_ioasic_zerobuf_gap16 __P((struct am7990_softc *, int, int)); 75 76 struct cfattach le_ioasic_ca = { 77 sizeof(struct le_softc), le_ioasic_match, le_ioasic_attach 78 }; 79 80 int 81 le_ioasic_match(parent, match, aux) 82 struct device *parent; 83 #ifdef __BROKEN_INDIRECT_CONFIG 84 void *match; 85 #else 86 struct cfdata *match; 87 #endif 88 void *aux; 89 { 90 struct ioasicdev_attach_args *d = aux; 91 92 if (!ioasic_submatch(match, aux)) 93 return (0); 94 if (strncmp("lance", d->iada_modname, TC_ROM_LLEN)) 95 return (0); 96 97 return (1); 98 } 99 100 void 101 le_ioasic_attach(parent, self, aux) 102 struct device *parent, *self; 103 void *aux; 104 { 105 struct ioasicdev_attach_args *d = aux; 106 register struct le_softc *lesc = (void *)self; 107 register struct am7990_softc *sc = &lesc->sc_am7990; 108 109 lesc->sc_r1 = (struct lereg1 *) 110 TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr)); 111 sc->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem); 112 113 sc->sc_copytodesc = le_ioasic_copytobuf_gap2; 114 sc->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2; 115 sc->sc_copytobuf = le_ioasic_copytobuf_gap16; 116 sc->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16; 117 sc->sc_zerobuf = le_ioasic_zerobuf_gap16; 118 119 ioasic_lance_dma_setup(le_iomem); /* XXX more thought */ 120 121 dec_le_common_attach(sc, ioasic_lance_ether_address()); 122 123 ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET, 124 am7990_intr, sc); 125 } 126 127 /* 128 * Special memory access functions needed by ioasic-attached LANCE 129 * chips. 130 */ 131 132 /* 133 * gap2: two bytes of data followed by two bytes of pad. 134 * 135 * Buffers must be 4-byte aligned. The code doesn't worry about 136 * doing an extra byte. 137 */ 138 139 void 140 le_ioasic_copytobuf_gap2(sc, fromv, boff, len) 141 struct am7990_softc *sc; 142 void *fromv; 143 int boff; 144 register int len; 145 { 146 volatile caddr_t buf = sc->sc_mem; 147 register caddr_t from = fromv; 148 register volatile u_int16_t *bptr; 149 150 if (boff & 0x1) { 151 /* handle unaligned first byte */ 152 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 153 *bptr = (*from++ << 8) | (*bptr & 0xff); 154 bptr += 2; 155 len--; 156 } else 157 bptr = ((volatile u_int16_t *)buf) + boff; 158 while (len > 1) { 159 *bptr = (from[1] << 8) | (from[0] & 0xff); 160 bptr += 2; 161 from += 2; 162 len -= 2; 163 } 164 if (len == 1) 165 *bptr = (u_int16_t)*from; 166 } 167 168 void 169 le_ioasic_copyfrombuf_gap2(sc, tov, boff, len) 170 struct am7990_softc *sc; 171 void *tov; 172 int boff, len; 173 { 174 volatile caddr_t buf = sc->sc_mem; 175 register caddr_t to = tov; 176 register volatile u_int16_t *bptr; 177 register u_int16_t tmp; 178 179 if (boff & 0x1) { 180 /* handle unaligned first byte */ 181 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 182 *to++ = (*bptr >> 8) & 0xff; 183 bptr += 2; 184 len--; 185 } else 186 bptr = ((volatile u_int16_t *)buf) + boff; 187 while (len > 1) { 188 tmp = *bptr; 189 *to++ = tmp & 0xff; 190 *to++ = (tmp >> 8) & 0xff; 191 bptr += 2; 192 len -= 2; 193 } 194 if (len == 1) 195 *to = *bptr & 0xff; 196 } 197 198 /* 199 * gap16: 16 bytes of data followed by 16 bytes of pad. 200 * 201 * Buffers must be 32-byte aligned. 202 */ 203 204 void 205 le_ioasic_copytobuf_gap16(sc, fromv, boff, len) 206 struct am7990_softc *sc; 207 void *fromv; 208 int boff; 209 register int len; 210 { 211 volatile caddr_t buf = sc->sc_mem; 212 register caddr_t from = fromv; 213 register caddr_t bptr; 214 register int xfer; 215 216 bptr = buf + ((boff << 1) & ~0x1f); 217 boff &= 0xf; 218 xfer = min(len, 16 - boff); 219 while (len > 0) { 220 bcopy(from, bptr + boff, xfer); 221 from += xfer; 222 bptr += 32; 223 boff = 0; 224 len -= xfer; 225 xfer = min(len, 16); 226 } 227 } 228 229 void 230 le_ioasic_copyfrombuf_gap16(sc, tov, boff, len) 231 struct am7990_softc *sc; 232 void *tov; 233 int boff, len; 234 { 235 volatile caddr_t buf = sc->sc_mem; 236 register caddr_t to = tov; 237 register caddr_t bptr; 238 register int xfer; 239 240 bptr = buf + ((boff << 1) & ~0x1f); 241 boff &= 0xf; 242 xfer = min(len, 16 - boff); 243 while (len > 0) { 244 bcopy(bptr + boff, to, xfer); 245 to += xfer; 246 bptr += 32; 247 boff = 0; 248 len -= xfer; 249 xfer = min(len, 16); 250 } 251 } 252 253 void 254 le_ioasic_zerobuf_gap16(sc, boff, len) 255 struct am7990_softc *sc; 256 int boff, len; 257 { 258 volatile caddr_t buf = sc->sc_mem; 259 register caddr_t bptr; 260 register int xfer; 261 262 bptr = buf + ((boff << 1) & ~0x1f); 263 boff &= 0xf; 264 xfer = min(len, 16 - boff); 265 while (len > 0) { 266 bzero(bptr + boff, xfer); 267 bptr += 32; 268 boff = 0; 269 len -= xfer; 270 xfer = min(len, 16); 271 } 272 } 273
Indexes created Tue Sep 30 07:10:03 GMT 2025