mx98905.c revision 1.9
1/* $NetBSD: mx98905.c,v 1.9 2007/03/04 06:01:59 christos 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 Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40/* 41 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 42 * adapters. 43 * 44 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 45 * 46 * Copyright (C) 1993, David Greenman. This software may be used, modified, 47 * copied, distributed, and sold, in both source and binary form provided that 48 * the above copyright and these terms are retained. Under no circumstances is 49 * the author responsible for the proper functioning of this software, nor does 50 * the author assume any responsibility for damages incurred with its use. 51 */ 52 53/* 54 * Special routines for the Macronix MX 98905. For use with the "ne" driver. 55 */ 56 57/* 58 * <URL:http://mail-index.NetBSD.org/port-arm32/1996/06/23/0005.html>: 59 * There are 2 types of etherh card. One uses the macronics chipset MX98905 60 * and that chipset has a bug in it, in that it the MSB remote DMA 61 * register does not work. There is a workaround for this which 62 * should be around soon. In fact, I think only the buffer ram test 63 * ever transfers more than 256 bytes across the DMA channel, so diabling 64 * it will make the mx stuff work. 65 */ 66 67#include <sys/param.h> 68 69__KERNEL_RCSID(0, "$NetBSD: mx98905.c,v 1.9 2007/03/04 06:01:59 christos Exp $"); 70 71#include <sys/device.h> 72#include <sys/mbuf.h> 73#include <sys/socket.h> 74#include <sys/syslog.h> 75#include <sys/systm.h> 76 77#include <net/if.h> 78#include <net/if_ether.h> 79#include <net/if_media.h> 80 81#include <machine/bus.h> 82 83#include <dev/ic/dp8390reg.h> 84#include <dev/ic/dp8390var.h> 85#include <dev/ic/ne2000reg.h> 86#include <dev/ic/ne2000var.h> 87#include <dev/ic/mx98905var.h> 88 89#ifndef __BUS_SPACE_HAS_STREAM_METHODS 90#define bus_space_write_stream_2 bus_space_write_2 91#define bus_space_write_multi_stream_2 bus_space_write_multi_2 92#define bus_space_read_multi_stream_2 bus_space_read_multi_2 93#endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 94 95static inline void mx98905_write_setup(struct dp8390_softc *, int, int); 96static inline void mx98905_write_wait(struct dp8390_softc *); 97 98void 99mx98905_attach(struct dp8390_softc *sc) 100{ 101 102 sc->ring_copy = mx98905_ring_copy; 103 sc->write_mbuf = mx98905_write_mbuf; 104 sc->read_hdr = mx98905_read_hdr; 105} 106 107static inline void 108mx98905_write_setup(sc, len, buf) 109 struct dp8390_softc *sc; 110 int len, buf; 111{ 112 bus_space_tag_t nict = sc->sc_regt; 113 bus_space_handle_t nich = sc->sc_regh; 114 115 /* Select page 0 registers. */ 116 NIC_BARRIER(nict, nich); 117 bus_space_write_1(nict, nich, ED_P0_CR, 118 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 119 NIC_BARRIER(nict, nich); 120 121 /* Reset remote DMA complete flag. */ 122 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 123 NIC_BARRIER(nict, nich); 124 125 /* Set up DMA byte count. */ 126 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 127 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 128 129 /* Set up destination address in NIC mem. */ 130 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 131 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 132 133 /* Set remote DMA write. */ 134 NIC_BARRIER(nict, nich); 135 bus_space_write_1(nict, nich, 136 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 137 NIC_BARRIER(nict, nich); 138} 139 140 141static inline void 142mx98905_write_wait(sc) 143 struct dp8390_softc *sc; 144{ 145 int maxwait = 100; /* about 120us */ 146 bus_space_tag_t nict = sc->sc_regt; 147 bus_space_handle_t nich = sc->sc_regh; 148 149 /* 150 * Wait for remote DMA to complete. This is necessary because on the 151 * transmit side, data is handled internally by the NIC in bursts, and 152 * we can't start another remote DMA until this one completes. Not 153 * waiting causes really bad things to happen - like the NIC wedging 154 * the bus. 155 */ 156 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 157 ED_ISR_RDC) && --maxwait) { 158 bus_space_read_1(nict, nich, ED_P0_CRDA1); 159 bus_space_read_1(nict, nich, ED_P0_CRDA0); 160 NIC_BARRIER(nict, nich); 161 DELAY(1); 162 } 163 164 if (maxwait == 0) { 165 log(LOG_WARNING, 166 "%s: remote transmit DMA failed to complete\n", 167 sc->sc_dev.dv_xname); 168 dp8390_reset(sc); 169 } 170} 171 172/* 173 * Write an mbuf chain to the destination NIC memory address using programmed 174 * I/O. 175 */ 176int 177mx98905_write_mbuf(sc, m, buf) 178 struct dp8390_softc *sc; 179 struct mbuf *m; 180 int buf; 181{ 182 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 183 bus_space_tag_t nict = sc->sc_regt; 184 bus_space_handle_t nich = sc->sc_regh; 185 bus_space_tag_t asict = nsc->sc_asict; 186 bus_space_handle_t asich = nsc->sc_asich; 187 int savelen, dmalen, resid, len; 188 u_int8_t *data, savebyte[2]; 189 int l, leftover; 190#ifdef DIAGNOSTIC 191 u_int8_t *lim; 192#endif 193 int i; 194 195 resid = savelen = m->m_pkthdr.len; 196 197 dmalen = min(resid, 254); 198 199 mx98905_write_setup(sc, dmalen, buf); 200 201 buf += dmalen; 202 resid -= dmalen; 203 204 /* 205 * Transfer the mbuf chain to the NIC memory. NE2000 cards 206 * require that data be transferred as words, and only words, 207 * so that case requires some extra code to patch over odd-length 208 * mbufs. 209 */ 210 /* NE2000s are a bit trickier. */ 211 /* Start out with no leftover data. */ 212 leftover = 0; 213 savebyte[0] = savebyte[1] = 0; 214 215 for (; m != 0; m = m->m_next) { 216 l = m->m_len; 217 if (l == 0) 218 continue; 219 data = mtod(m, u_int8_t *); 220#ifdef DIAGNOSTIC 221 lim = data + l; 222#endif 223 while (l > 0) { 224 if (leftover) { 225 /* 226 * Data left over (from mbuf or 227 * realignment). Buffer the next 228 * byte, and write it and the leftover 229 * data out. 230 */ 231 savebyte[1] = *data++; 232 l--; 233 bus_space_write_stream_2(asict, asich, 234 NE2000_ASIC_DATA, *(u_int16_t *)savebyte); 235 dmalen -= 2; 236 leftover = 0; 237 } else if (BUS_SPACE_ALIGNED_POINTER(data, 238 u_int16_t) == 0) { 239 /* Unaligned data; buffer the next byte. */ 240 savebyte[0] = *data++; 241 l--; 242 leftover = 1; 243 } else { 244 /* 245 * Aligned data; output contiguous 246 * words as much as we can, then 247 * buffer the remaining byte, if any. 248 */ 249 len = min(l, dmalen); 250 leftover = len & 1; 251 len &= ~1; 252 bus_space_write_multi_stream_2(asict, 253 asich, NE2000_ASIC_DATA, 254 (u_int16_t *)data, len >> 1); 255 dmalen -= len; 256 data += len; 257 if (leftover) 258 savebyte[0] = *data++; 259 l -= len + leftover; 260 } 261 if (dmalen == 0 && resid > 0) { 262 mx98905_write_wait(sc); 263 dmalen = min(resid, 254); 264 265 mx98905_write_setup(sc, dmalen, buf); 266 267 buf += dmalen; 268 resid -= dmalen; 269 } 270 } 271 if (l < 0) 272 panic("mx98905_write_mbuf: negative len"); 273#ifdef DIAGNOSTIC 274 if (data != lim) 275 panic("mx98905_write_mbuf: data != lim"); 276#endif 277 } 278 if (leftover) { 279 savebyte[1] = 0; 280 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 281 *(u_int16_t *)savebyte); 282 } 283 if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) { 284 for(i = 0; i < (ETHER_MIN_LEN - ETHER_CRC_LEN - savelen) >> 1; 285 i++) 286 bus_space_write_stream_2(asict, asich, 287 NE2000_ASIC_DATA, 0); 288 savelen = ETHER_MIN_LEN - ETHER_CRC_LEN; 289 } 290 NIC_BARRIER(nict, nich); 291 292 mx98905_write_wait(sc); 293 294 return (savelen); 295} 296 297/* 298 * Given a source and destination address, copy 'amout' of a packet from 299 * the ring buffer into a linear destination buffer. Takes into account 300 * ring-wrap. 301 */ 302int 303mx98905_ring_copy(sc, src, dst, amount) 304 struct dp8390_softc *sc; 305 int src; 306 void *dst; 307 u_short amount; 308{ 309 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 310 bus_space_tag_t nict = sc->sc_regt; 311 bus_space_handle_t nich = sc->sc_regh; 312 bus_space_tag_t asict = nsc->sc_asict; 313 bus_space_handle_t asich = nsc->sc_asich; 314 u_short tmp_amount; 315 int useword = nsc->sc_useword; 316 317 /* Does copy wrap to lower addr in ring buffer? */ 318 if (src + amount > sc->mem_end) { 319 tmp_amount = sc->mem_end - src; 320 321 /* Copy amount up to end of NIC memory. */ 322 mx98905_readmem(nict, nich, asict, asich, src, 323 (u_int8_t *)dst, tmp_amount, useword); 324 325 amount -= tmp_amount; 326 src = sc->mem_ring; 327 dst += tmp_amount; 328 } 329 330 mx98905_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst, 331 amount, useword); 332 333 return (src + amount); 334} 335 336void 337mx98905_read_hdr(sc, buf, hdr) 338 struct dp8390_softc *sc; 339 int buf; 340 struct dp8390_ring *hdr; 341{ 342 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 343 344 mx98905_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, 345 buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring), 346 nsc->sc_useword); 347#if BYTE_ORDER == BIG_ENDIAN 348 hdr->count = bswap16(hdr->count); 349#endif 350} 351 352static inline void 353mx98905_read_setup(bus_space_tag_t nict, bus_space_handle_t nich, 354 int len, int buf) 355{ 356 357 /* Select page 0 registers. */ 358 NIC_BARRIER(nict, nich); 359 bus_space_write_1(nict, nich, ED_P0_CR, 360 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 361 NIC_BARRIER(nict, nich); 362 363 /* Set up DMA byte count. */ 364 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 365 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 366 367 /* Set up source address in NIC mem. */ 368 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 369 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 370 371 NIC_BARRIER(nict, nich); 372 bus_space_write_1(nict, nich, ED_P0_CR, 373 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); 374 375 bus_space_barrier(nict, nich, 0, NE2000_NPORTS, 376 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 377} 378 379/* 380 * Given a NIC memory source address and a host memory destination address, 381 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is 382 * rounded up to a word - ok as long as mbufs are word sized. 383 */ 384void 385mx98905_readmem(nict, nich, asict, asich, src, dst, amount, useword) 386 bus_space_tag_t nict; 387 bus_space_handle_t nich; 388 bus_space_tag_t asict; 389 bus_space_handle_t asich; 390 int src; 391 u_int8_t *dst; 392 size_t amount; 393 int useword; 394{ 395 int len, resid; 396 397 resid = amount; 398 /* Round up to a word. */ 399 if (resid & 1) 400 ++resid; 401 402 while (resid > 0) { 403 len = min(resid, 254); 404 mx98905_read_setup(nict, nich, len, src); 405 if (useword) 406 bus_space_read_multi_stream_2(asict, asich, 407 NE2000_ASIC_DATA, (u_int16_t *)dst, len >> 1); 408 else 409 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, 410 dst, len); 411 resid -= len; 412 src += len; 413 dst += len; 414 } 415} 416