1 /* $NetBSD: dm9000.c,v 1.38 2024/12/01 20:24:23 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Paul Fleischer 5 * All rights reserved. 6 * 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the company nor the name of the author may be used to 13 * endorse or promote products derived from this software without specific 14 * prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* based on sys/dev/ic/cs89x0.c */ 30 /* 31 * Copyright (c) 2004 Christopher Gilbert 32 * All rights reserved. 33 * 34 * 1. Redistributions of source code must retain the above copyright 35 * notice, this list of conditions and the following disclaimer. 36 * 2. Redistributions in binary form must reproduce the above copyright 37 * notice, this list of conditions and the following disclaimer in the 38 * documentation and/or other materials provided with the distribution. 39 * 3. The name of the company nor the name of the author may be used to 40 * endorse or promote products derived from this software without specific 41 * prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 44 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 45 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 46 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 47 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 48 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 49 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 */ 55 56 /* 57 * Copyright 1997 58 * Digital Equipment Corporation. All rights reserved. 59 * 60 * This software is furnished under license and may be used and 61 * copied only in accordance with the following terms and conditions. 62 * Subject to these conditions, you may download, copy, install, 63 * use, modify and distribute this software in source and/or binary 64 * form. No title or ownership is transferred hereby. 65 * 66 * 1) Any source code used, modified or distributed must reproduce 67 * and retain this copyright notice and list of conditions as 68 * they appear in the source file. 69 * 70 * 2) No right is granted to use any trade name, trademark, or logo of 71 * Digital Equipment Corporation. Neither the "Digital Equipment 72 * Corporation" name nor any trademark or logo of Digital Equipment 73 * Corporation may be used to endorse or promote products derived 74 * from this software without the prior written permission of 75 * Digital Equipment Corporation. 76 * 77 * 3) This software is provided "AS-IS" and any express or implied 78 * warranties, including but not limited to, any implied warranties 79 * of merchantability, fitness for a particular purpose, or 80 * non-infringement are disclaimed. In no event shall DIGITAL be 81 * liable for any damages whatsoever, and in particular, DIGITAL 82 * shall not be liable for special, indirect, consequential, or 83 * incidental damages or damages for lost profits, loss of 84 * revenue or loss of use, whether such damages arise in contract, 85 * negligence, tort, under statute, in equity, at law or otherwise, 86 * even if advised of the possibility of such damage. 87 */ 88 89 #include <sys/cdefs.h> 90 91 #include <sys/param.h> 92 #include <sys/bus.h> 93 #include <sys/intr.h> 94 #include <sys/device.h> 95 #include <sys/mbuf.h> 96 #include <sys/sockio.h> 97 #include <sys/errno.h> 98 #include <sys/cprng.h> 99 #include <sys/rndsource.h> 100 #include <sys/kernel.h> 101 #include <sys/systm.h> 102 103 #include <net/if.h> 104 #include <net/if_dl.h> 105 #include <net/if_ether.h> 106 #include <net/if_media.h> 107 #include <dev/mii/mii.h> 108 #include <dev/mii/miivar.h> 109 #include <net/bpf.h> 110 111 #include <dev/ic/dm9000var.h> 112 #include <dev/ic/dm9000reg.h> 113 114 #if 1 115 #undef DM9000_DEBUG 116 #undef DM9000_TX_DEBUG 117 #undef DM9000_TX_DATA_DEBUG 118 #undef DM9000_RX_DEBUG 119 #undef DM9000_RX_DATA_DEBUG 120 #else 121 #define DM9000_DEBUG 122 #define DM9000_TX_DEBUG 123 #define DM9000_TX_DATA_DEBUG 124 #define DM9000_RX_DEBUG 125 #define DM9000_RX_DATA_DEBUG 126 #endif 127 128 #ifdef DM9000_DEBUG 129 #define DPRINTF(s) do {printf s; } while (/*CONSTCOND*/0) 130 #else 131 #define DPRINTF(s) do {} while (/*CONSTCOND*/0) 132 #endif 133 134 #ifdef DM9000_TX_DEBUG 135 #define TX_DPRINTF(s) do {printf s; } while (/*CONSTCOND*/0) 136 #else 137 #define TX_DPRINTF(s) do {} while (/*CONSTCOND*/0) 138 #endif 139 140 #ifdef DM9000_RX_DEBUG 141 #define RX_DPRINTF(s) do {printf s; } while (/*CONSTCOND*/0) 142 #else 143 #define RX_DPRINTF(s) do {} while (/*CONSTCOND*/0) 144 #endif 145 146 #ifdef DM9000_RX_DATA_DEBUG 147 #define RX_DATA_DPRINTF(s) do {printf s; } while (/*CONSTCOND*/0) 148 #else 149 #define RX_DATA_DPRINTF(s) do {} while (/*CONSTCOND*/0) 150 #endif 151 152 #ifdef DM9000_TX_DATA_DEBUG 153 #define TX_DATA_DPRINTF(s) do {printf s; } while (/*CONSTCOND*/0) 154 #else 155 #define TX_DATA_DPRINTF(s) do {} while (/*CONSTCOND*/0) 156 #endif 157 158 static void dme_reset(struct dme_softc *); 159 static int dme_init(struct ifnet *); 160 static void dme_stop(struct ifnet *, int); 161 static void dme_start(struct ifnet *); 162 static int dme_ioctl(struct ifnet *, u_long, void *); 163 164 static void dme_set_rcvfilt(struct dme_softc *); 165 static void mii_statchg(struct ifnet *); 166 static void lnkchg(struct dme_softc *); 167 static void phy_tick(void *); 168 static int mii_readreg(device_t, int, int, uint16_t *); 169 static int mii_writereg(device_t, int, int, uint16_t); 170 171 static void dme_prepare(struct ifnet *); 172 static void dme_transmit(struct ifnet *); 173 static void dme_receive(struct ifnet *); 174 175 static int pkt_read_2(struct dme_softc *, struct mbuf **); 176 static int pkt_write_2(struct dme_softc *, struct mbuf *); 177 static int pkt_read_1(struct dme_softc *, struct mbuf **); 178 static int pkt_write_1(struct dme_softc *, struct mbuf *); 179 #define PKT_READ(ii,m) (*(ii)->sc_pkt_read)((ii),(m)) 180 #define PKT_WRITE(ii,m) (*(ii)->sc_pkt_write)((ii),(m)) 181 182 #define ETHER_IS_ONE(x) \ 183 (((x)[0] & (x)[1] & (x)[2] & (x)[3] & (x)[4] & (x)[5]) == 255) 184 #define ETHER_IS_ZERO(x) \ 185 (((x)[0] | (x)[1] | (x)[2] | (x)[3] | (x)[4] | (x)[5]) == 0) 186 187 int 188 dme_attach(struct dme_softc *sc, const uint8_t *notusedanymore) 189 { 190 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 191 struct mii_data *mii = &sc->sc_mii; 192 struct ifmedia *ifm = &mii->mii_media; 193 uint8_t b[2]; 194 uint16_t io_mode; 195 uint8_t enaddr[ETHER_ADDR_LEN]; 196 prop_dictionary_t dict; 197 prop_data_t ea; 198 199 dme_read_c(sc, DM9000_VID0, b, 2); 200 sc->sc_vendor_id = le16toh((uint16_t)b[1] << 8 | b[0]); 201 dme_read_c(sc, DM9000_PID0, b, 2); 202 sc->sc_product_id = le16toh((uint16_t)b[1] << 8 | b[0]); 203 204 /* TODO: Check the vendor ID as well */ 205 if (sc->sc_product_id != 0x9000) { 206 panic("dme_attach: product id mismatch (0x%hx != 0x9000)", 207 sc->sc_product_id); 208 } 209 #if 1 || DM9000_DEBUG 210 { 211 dme_read_c(sc, DM9000_PAB0, enaddr, 6); 212 aprint_normal_dev(sc->sc_dev, 213 "DM9000 was configured with MAC address: %s\n", 214 ether_sprintf(enaddr)); 215 } 216 #endif 217 dict = device_properties(sc->sc_dev); 218 ea = (dict) ? prop_dictionary_get(dict, "mac-address") : NULL; 219 if (ea != NULL) { 220 /* 221 * If the MAC address is overridden by a device property, 222 * use that. 223 */ 224 KASSERT(prop_object_type(ea) == PROP_TYPE_DATA); 225 KASSERT(prop_data_size(ea) == ETHER_ADDR_LEN); 226 memcpy(enaddr, prop_data_value(ea), ETHER_ADDR_LEN); 227 aprint_debug_dev(sc->sc_dev, "got MAC address!\n"); 228 } else { 229 /* 230 * If we did not get an externally configure address, 231 * try to read one from the current setup, before 232 * resetting the chip. 233 */ 234 dme_read_c(sc, DM9000_PAB0, enaddr, 6); 235 if (ETHER_IS_ONE(enaddr) || ETHER_IS_ZERO(enaddr)) { 236 /* make a random MAC address */ 237 uint32_t maclo = 0x00f2 | (cprng_strong32() << 16); 238 uint32_t machi = cprng_strong32(); 239 enaddr[0] = maclo; 240 enaddr[1] = maclo >> 8; 241 enaddr[2] = maclo >> 16; 242 enaddr[3] = maclo >> 26; 243 enaddr[4] = machi; 244 enaddr[5] = machi >> 8; 245 } 246 } 247 /* TODO: perform explicit EEPROM read op if it's available */ 248 249 dme_reset(sc); 250 251 mii->mii_ifp = ifp; 252 mii->mii_readreg = mii_readreg; 253 mii->mii_writereg = mii_writereg; 254 mii->mii_statchg = mii_statchg; 255 256 /* assume davicom PHY at 1. ext PHY could be hooked but only at 0-3 */ 257 sc->sc_ethercom.ec_mii = mii; 258 ifmedia_init(ifm, 0, ether_mediachange, ether_mediastatus); 259 mii_attach(sc->sc_dev, mii, 0xffffffff, 1 /* PHY 1 */, 260 MII_OFFSET_ANY, 0); 261 if (LIST_FIRST(&mii->mii_phys) == NULL) { 262 ifmedia_add(ifm, IFM_ETHER | IFM_NONE, 0, NULL); 263 ifmedia_set(ifm, IFM_ETHER | IFM_NONE); 264 } else 265 ifmedia_set(ifm, IFM_ETHER | IFM_AUTO); 266 ifm->ifm_media = ifm->ifm_cur->ifm_media; 267 268 strlcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 269 ifp->if_softc = sc; 270 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 271 ifp->if_init = dme_init; 272 ifp->if_start = dme_start; 273 ifp->if_stop = dme_stop; 274 ifp->if_ioctl = dme_ioctl; 275 ifp->if_watchdog = NULL; /* no watchdog used */ 276 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 277 IFQ_SET_READY(&ifp->if_snd); 278 279 if_attach(ifp); 280 ether_ifattach(ifp, enaddr); 281 if_deferred_start_init(ifp, NULL); 282 283 rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), 284 RND_TYPE_NET, RND_FLAG_DEFAULT); 285 286 /* might be unnecessary as link change interrupt works well */ 287 callout_init(&sc->sc_link_callout, 0); 288 callout_setfunc(&sc->sc_link_callout, phy_tick, sc); 289 290 io_mode = (dme_read(sc, DM9000_ISR) & 291 DM9000_IOMODE_MASK) >> DM9000_IOMODE_SHIFT; 292 293 /* frame body read/write ops in 2 byte quantity or byte-wise. */ 294 DPRINTF(("DM9000 Operation Mode: ")); 295 switch (io_mode) { 296 case DM9000_MODE_8BIT: 297 DPRINTF(("8-bit mode")); 298 sc->sc_data_width = 1; 299 sc->sc_pkt_write = pkt_write_1; 300 sc->sc_pkt_read = pkt_read_1; 301 break; 302 case DM9000_MODE_16BIT: 303 DPRINTF(("16-bit mode")); 304 sc->sc_data_width = 2; 305 sc->sc_pkt_write = pkt_write_2; 306 sc->sc_pkt_read = pkt_read_2; 307 break; 308 case DM9000_MODE_32BIT: 309 DPRINTF(("32-bit mode")); 310 sc->sc_data_width = 4; 311 panic("32bit mode is unsupported\n"); 312 break; 313 default: 314 DPRINTF(("Invalid mode")); 315 break; 316 } 317 DPRINTF(("\n")); 318 319 return 0; 320 } 321 322 int 323 dme_detach(struct dme_softc *sc) 324 { 325 return 0; 326 } 327 328 /* Software Initialize/Reset of the DM9000 */ 329 static void 330 dme_reset(struct dme_softc *sc) 331 { 332 uint8_t misc; 333 334 /* We only re-initialized the PHY in this function the first time it is 335 * called. */ 336 if (!sc->sc_phy_initialized) { 337 /* PHY Reset */ 338 mii_writereg(sc->sc_dev, 1, MII_BMCR, BMCR_RESET); 339 340 /* PHY Power Down */ 341 misc = dme_read(sc, DM9000_GPR); 342 dme_write(sc, DM9000_GPR, misc | DM9000_GPR_PHY_PWROFF); 343 } 344 345 /* Reset the DM9000 twice, as described in section 2 of the Programming 346 * Guide. 347 * The PHY is initialized and enabled between those two resets. 348 */ 349 350 /* Software Reset */ 351 dme_write(sc, DM9000_NCR, 352 DM9000_NCR_RST | DM9000_NCR_LBK_MAC_INTERNAL); 353 delay(20); 354 dme_write(sc, DM9000_NCR, 0x0); 355 356 if (!sc->sc_phy_initialized) { 357 /* PHY Enable */ 358 misc = dme_read(sc, DM9000_GPR); 359 dme_write(sc, DM9000_GPR, misc & ~DM9000_GPR_PHY_PWROFF); 360 misc = dme_read(sc, DM9000_GPCR); 361 dme_write(sc, DM9000_GPCR, misc | DM9000_GPCR_GPIO0_OUT); 362 363 dme_write(sc, DM9000_NCR, 364 DM9000_NCR_RST | DM9000_NCR_LBK_MAC_INTERNAL); 365 delay(20); 366 dme_write(sc, DM9000_NCR, 0x0); 367 } 368 369 /* Select internal PHY, no wakeup event, no collosion mode, 370 * normal loopback mode. 371 */ 372 dme_write(sc, DM9000_NCR, DM9000_NCR_LBK_NORMAL); 373 374 /* Will clear TX1END, TX2END, and WAKEST fields by reading DM9000_NSR*/ 375 dme_read(sc, DM9000_NSR); 376 377 /* Enable wraparound of read/write pointer, frame received latch, 378 * and frame transmitted latch. 379 */ 380 dme_write(sc, DM9000_IMR, 381 DM9000_IMR_PAR | DM9000_IMR_PRM | DM9000_IMR_PTM); 382 383 dme_write(sc, DM9000_RCR, 384 DM9000_RCR_DIS_CRC | DM9000_RCR_DIS_LONG | DM9000_RCR_WTDIS); 385 386 sc->sc_phy_initialized = 1; 387 } 388 389 static int 390 dme_init(struct ifnet *ifp) 391 { 392 struct dme_softc *sc = ifp->if_softc; 393 394 dme_stop(ifp, 0); 395 dme_reset(sc); 396 dme_write_c(sc, DM9000_PAB0, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 397 dme_set_rcvfilt(sc); 398 (void)ether_mediachange(ifp); 399 400 sc->txbusy = sc->txready = 0; 401 402 ifp->if_flags |= IFF_RUNNING; 403 callout_schedule(&sc->sc_link_callout, hz); 404 405 return 0; 406 } 407 408 /* Configure multicast filter */ 409 static void 410 dme_set_rcvfilt(struct dme_softc *sc) 411 { 412 struct ethercom *ec = &sc->sc_ethercom; 413 struct ifnet *ifp = &ec->ec_if; 414 struct ether_multi *enm; 415 struct ether_multistep step; 416 uint8_t mchash[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; /* 64bit mchash */ 417 uint32_t h = 0; 418 int rcr; 419 420 rcr = dme_read(sc, DM9000_RCR); 421 rcr &= ~(DM9000_RCR_PRMSC | DM9000_RCR_ALL); 422 dme_write(sc, DM9000_RCR, rcr &~ DM9000_RCR_RXEN); 423 424 ETHER_LOCK(ec); 425 if (ifp->if_flags & IFF_PROMISC) { 426 ec->ec_flags |= ETHER_F_ALLMULTI; 427 ETHER_UNLOCK(ec); 428 /* run promisc. mode */ 429 rcr |= DM9000_RCR_PRMSC; 430 goto update; 431 } 432 ec->ec_flags &= ~ETHER_F_ALLMULTI; 433 ETHER_FIRST_MULTI(step, ec, enm); 434 while (enm != NULL) { 435 if (memcpy(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) { 436 /* 437 * We must listen to a range of multicast addresses. 438 * For now, just accept all multicasts, rather than 439 * trying to set only those filter bits needed to match 440 * the range. (At this time, the only use of address 441 * ranges is for IP multicast routing, for which the 442 * range is big enough to require all bits set.) 443 */ 444 ec->ec_flags |= ETHER_F_ALLMULTI; 445 ETHER_UNLOCK(ec); 446 memset(mchash, 0xff, sizeof(mchash)); /* necessary? */ 447 /* accept all mulicast frame */ 448 rcr |= DM9000_RCR_ALL; 449 goto update; 450 } 451 h = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN) & 0x3f; 452 /* 3(5:3) and 3(2:0) sampling to have uint8_t[8] */ 453 mchash[h / 8] |= 1 << (h % 8); 454 ETHER_NEXT_MULTI(step, enm); 455 } 456 ETHER_UNLOCK(ec); 457 /* DM9000 receive filter is always on */ 458 mchash[7] |= 0x80; /* to catch bcast frame */ 459 update: 460 dme_write_c(sc, DM9000_MAB0, mchash, sizeof(mchash)); 461 dme_write(sc, DM9000_RCR, rcr | DM9000_RCR_RXEN); 462 return; 463 } 464 465 void 466 lnkchg(struct dme_softc *sc) 467 { 468 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 469 struct ifmediareq ifmr; 470 471 ether_mediastatus(ifp, &ifmr); 472 } 473 474 static void 475 mii_statchg(struct ifnet *ifp) 476 { 477 struct dme_softc *sc = ifp->if_softc; 478 struct mii_data *mii = &sc->sc_mii; 479 uint8_t fcr, ncr; 480 481 #if 0 482 const uint8_t Mbps[2] = { 10, 100 }; 483 uint8_t nsr = dme_read(sc, DM9000_NSR); 484 int spd = Mbps[!!(nsr & DM9000_NSR_SPEED)]; 485 /* speed/duplexity available also in reg 0x11 of internal PHY */ 486 if (nsr & DM9000_NSR_LINKST) 487 printf("link up,spd%d", spd); 488 else 489 printf("link down"); 490 491 /* show resolved mii(4) parameters */ 492 printf("MII spd%d", 493 (int)(sc->sc_ethercom.ec_if.if_baudrate / IF_Mbps(1))); 494 if (mii->mii_media_active & IFM_FDX) 495 printf(",full-duplex"); 496 printf("\n"); 497 #endif 498 499 /* Adjust duplexity and PAUSE flow control. */ 500 fcr = dme_read(sc, DM9000_FCR) &~ DM9000_FCR_FLCE; 501 ncr = dme_read(sc, DM9000_NCR) &~ DM9000_NCR_FDX; 502 if ((mii->mii_media_active & IFM_FDX) 503 && (mii->mii_media_active & IFM_FLOW)) { 504 fcr |= DM9000_FCR_FLCE; 505 ncr |= DM9000_NCR_FDX; 506 } 507 dme_write(sc, DM9000_FCR, fcr); 508 dme_write(sc, DM9000_NCR, ncr); 509 } 510 511 static void 512 phy_tick(void *arg) 513 { 514 struct dme_softc *sc = arg; 515 struct mii_data *mii = &sc->sc_mii; 516 int s; 517 518 s = splnet(); 519 mii_tick(mii); 520 splx(s); 521 522 callout_schedule(&sc->sc_link_callout, hz); 523 } 524 525 static int 526 mii_readreg(device_t self, int phy, int reg, uint16_t *val) 527 { 528 struct dme_softc *sc = device_private(self); 529 530 if (phy != 1) 531 return EINVAL; 532 533 /* Select Register to read*/ 534 dme_write(sc, DM9000_EPAR, DM9000_EPAR_INT_PHY + 535 (reg & DM9000_EPAR_EROA_MASK)); 536 /* Select read operation (DM9000_EPCR_ERPRR) from the PHY */ 537 dme_write(sc, DM9000_EPCR, DM9000_EPCR_ERPRR + DM9000_EPCR_EPOS_PHY); 538 539 /* Wait until access to PHY has completed */ 540 while (dme_read(sc, DM9000_EPCR) & DM9000_EPCR_ERRE) 541 ; 542 543 /* Reset ERPRR-bit */ 544 dme_write(sc, DM9000_EPCR, DM9000_EPCR_EPOS_PHY); 545 546 *val = dme_read(sc, DM9000_EPDRL) | (dme_read(sc, DM9000_EPDRH) << 8); 547 return 0; 548 } 549 550 static int 551 mii_writereg(device_t self, int phy, int reg, uint16_t val) 552 { 553 struct dme_softc *sc = device_private(self); 554 555 if (phy != 1) 556 return EINVAL; 557 558 /* Select Register to write */ 559 dme_write(sc, DM9000_EPAR, DM9000_EPAR_INT_PHY + 560 (reg & DM9000_EPAR_EROA_MASK)); 561 562 /* Write data to the two data registers */ 563 dme_write(sc, DM9000_EPDRL, val & 0xFF); 564 dme_write(sc, DM9000_EPDRH, (val >> 8) & 0xFF); 565 566 /* Select write operation (DM9000_EPCR_ERPRW) from the PHY */ 567 dme_write(sc, DM9000_EPCR, DM9000_EPCR_ERPRW + DM9000_EPCR_EPOS_PHY); 568 569 /* Wait until access to PHY has completed */ 570 while (dme_read(sc, DM9000_EPCR) & DM9000_EPCR_ERRE) 571 ; 572 573 /* Reset ERPRR-bit */ 574 dme_write(sc, DM9000_EPCR, DM9000_EPCR_EPOS_PHY); 575 576 return 0; 577 } 578 579 void 580 dme_stop(struct ifnet *ifp, int disable) 581 { 582 struct dme_softc *sc = ifp->if_softc; 583 584 /* Not quite sure what to do when called with disable == 0 */ 585 if (disable) { 586 /* Disable RX */ 587 dme_write(sc, DM9000_RCR, 0x0); 588 } 589 mii_down(&sc->sc_mii); 590 callout_stop(&sc->sc_link_callout); 591 592 ifp->if_flags &= ~IFF_RUNNING; 593 ifp->if_timer = 0; 594 } 595 596 static void 597 dme_start(struct ifnet *ifp) 598 { 599 struct dme_softc *sc = ifp->if_softc; 600 601 if ((ifp->if_flags & IFF_RUNNING) == 0) { 602 return; 603 } 604 if (!sc->txready) { 605 dme_prepare(ifp); 606 } 607 if (sc->txbusy) { 608 /* 609 * We need to wait until the current frame has 610 * been transmitted. 611 */ 612 return; 613 } 614 if (sc->txready) { 615 /* We are ready to transmit right away */ 616 dme_transmit(ifp); 617 } 618 dme_prepare(ifp); /* Prepare next one */ 619 } 620 621 /* Prepare data to be transmitted (i.e. dequeue and load it into the DM9000) */ 622 static void 623 dme_prepare(struct ifnet *ifp) 624 { 625 struct dme_softc *sc = ifp->if_softc; 626 uint16_t length; 627 struct mbuf *m; 628 629 KASSERT(!sc->txready); 630 631 IFQ_DEQUEUE(&ifp->if_snd, m); 632 if (m == NULL) { 633 TX_DPRINTF(("dme_prepare: Nothing to transmit\n")); 634 return; /* Nothing to transmit */ 635 } 636 637 /* Element has now been removed from the queue, so we better send it */ 638 639 bpf_mtap(ifp, m, BPF_D_OUT); 640 641 /* Setup the DM9000 to accept the writes, and then write each buf in 642 the chain. */ 643 644 TX_DATA_DPRINTF(("dme_prepare: Writing data: ")); 645 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->dme_io, DM9000_MWCMD); 646 length = PKT_WRITE(sc, m); 647 bpf_mtap(ifp, m, BPF_D_OUT); 648 TX_DATA_DPRINTF(("\n")); 649 650 if (length % sc->sc_data_width != 0) 651 panic("dme_prepare: length is not compatible with IO_MODE"); 652 653 sc->txready_length = length; 654 sc->txready = 1; 655 m_freem(m); 656 } 657 658 /* Transmit prepared data */ 659 static void 660 dme_transmit(struct ifnet *ifp) 661 { 662 struct dme_softc *sc = ifp->if_softc; 663 664 TX_DPRINTF(("dme_transmit: PRE: txready: %d, txbusy: %d\n", 665 sc->txready, sc->txbusy)); 666 667 /* prime frame length first */ 668 dme_write(sc, DM9000_TXPLL, sc->txready_length & 0xff); 669 dme_write(sc, DM9000_TXPLH, (sc->txready_length >> 8) & 0xff); 670 /* read isr next */ 671 dme_read(sc, DM9000_ISR); 672 /* finally issue a request to send */ 673 dme_write(sc, DM9000_TCR, DM9000_TCR_TXREQ); 674 sc->txready = 0; 675 sc->txbusy = 1; 676 sc->txready_length = 0; 677 } 678 679 /* Receive data */ 680 static void 681 dme_receive(struct ifnet *ifp) 682 { 683 struct dme_softc *sc = ifp->if_softc; 684 struct mbuf *m; 685 uint8_t avail, rsr; 686 687 DPRINTF(("inside dme_receive\n")); 688 689 /* frame has just arrived, retrieve it */ 690 /* called right after Rx frame available interrupt */ 691 do { 692 /* "no increment" read to get the avail byte without 693 moving past it. */ 694 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->dme_io, 695 DM9000_MRCMDX); 696 /* Read twice */ 697 avail = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->dme_data); 698 avail = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->dme_data); 699 avail &= 03; /* 1:0 we only want these bits */ 700 if (avail == 01) { 701 /* Read with address increment. */ 702 bus_space_write_1(sc->sc_iot, sc->sc_ioh, sc->dme_io, 703 DM9000_MRCMD); 704 rsr = PKT_READ(sc, &m); 705 if (m == NULL) { 706 /* failed to allocate a receive buffer */ 707 RX_DPRINTF(("dme_receive: " 708 "Error allocating buffer\n")); 709 if_statinc(ifp, if_ierrors); 710 continue; 711 } 712 if (rsr & (DM9000_RSR_CE | DM9000_RSR_PLE)) { 713 /* Error while receiving the frame, 714 * discard it and keep track of counters 715 */ 716 RX_DPRINTF(("dme_receive: " 717 "Error reciving frame\n")); 718 if_statinc(ifp, if_ierrors); 719 continue; 720 } 721 if (rsr & DM9000_RSR_LCS) { 722 if_statinc(ifp, if_collisions); 723 continue; 724 } 725 /* pick and forward this frame to ifq */ 726 if_percpuq_enqueue(ifp->if_percpuq, m); 727 } else if (avail != 00) { 728 /* Should this be logged somehow? */ 729 printf("%s: Resetting chip\n", 730 device_xname(sc->sc_dev)); 731 dme_reset(sc); 732 break; 733 } 734 } while (avail == 01); 735 /* frame received successfully */ 736 } 737 738 int 739 dme_intr(void *arg) 740 { 741 struct dme_softc *sc = arg; 742 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 743 uint8_t isr, nsr, tsr; 744 745 DPRINTF(("dme_intr: Begin\n")); 746 747 /* Disable interrupts */ 748 dme_write(sc, DM9000_IMR, DM9000_IMR_PAR); 749 750 isr = dme_read(sc, DM9000_ISR); 751 dme_write(sc, DM9000_ISR, isr); /* write to clear */ 752 753 if (isr & DM9000_ISR_PRS) { 754 KASSERT(ifp->if_flags & IFF_RUNNING); 755 dme_receive(ifp); 756 } 757 if (isr & DM9000_ISR_LNKCHNG) 758 lnkchg(sc); 759 if (isr & DM9000_ISR_PTS) { 760 tsr = 0x01; /* Initialize to an error value */ 761 762 /* A frame has been transmitted */ 763 sc->txbusy = 0; 764 765 nsr = dme_read(sc, DM9000_NSR); 766 if (nsr & DM9000_NSR_TX1END) { 767 tsr = dme_read(sc, DM9000_TSR1); 768 TX_DPRINTF(("dme_intr: Sent using channel 0\n")); 769 } else if (nsr & DM9000_NSR_TX2END) { 770 tsr = dme_read(sc, DM9000_TSR2); 771 TX_DPRINTF(("dme_intr: Sent using channel 1\n")); 772 } 773 774 if (tsr == 0x0) { 775 /* Frame successfully sent */ 776 if_statinc(ifp, if_opackets); 777 } else { 778 if_statinc(ifp, if_oerrors); 779 } 780 781 /* If we have nothing ready to transmit, prepare something */ 782 if (!sc->txready) 783 dme_prepare(ifp); 784 785 if (sc->txready) 786 dme_transmit(ifp); 787 788 /* Prepare the next frame */ 789 dme_prepare(ifp); 790 791 if_schedule_deferred_start(ifp); 792 } 793 794 /* Enable interrupts again */ 795 dme_write(sc, DM9000_IMR, 796 DM9000_IMR_PAR | DM9000_IMR_PRM | DM9000_IMR_PTM); 797 798 DPRINTF(("dme_intr: End\n")); 799 800 return (isr != 0); 801 } 802 803 static int 804 dme_ioctl(struct ifnet *ifp, u_long cmd, void *data) 805 { 806 struct dme_softc *sc = ifp->if_softc; 807 struct ifreq *ifr = (struct ifreq *)data; 808 struct ifmedia *ifm = &sc->sc_mii.mii_media; 809 int s, error; 810 811 s = splnet(); 812 switch (cmd) { 813 case SIOCSIFMEDIA: 814 /* Flow control requires full-duplex mode. */ 815 if (IFM_SUBTYPE(ifr->ifr_media) == IFM_AUTO || 816 (ifr->ifr_media & IFM_FDX) == 0) 817 ifr->ifr_media &= ~IFM_ETH_FMASK; 818 if (IFM_SUBTYPE(ifr->ifr_media) != IFM_AUTO) { 819 if ((ifr->ifr_media & IFM_ETH_FMASK) == IFM_FLOW) { 820 ifr->ifr_media |= 821 IFM_ETH_TXPAUSE | IFM_ETH_RXPAUSE; 822 } 823 } 824 error = ifmedia_ioctl(ifp, ifr, ifm, cmd); 825 break; 826 default: 827 if ((error = ether_ioctl(ifp, cmd, data)) != ENETRESET) 828 break; 829 error = 0; 830 if (cmd == SIOCSIFCAP) 831 error = if_init(ifp); 832 else if (cmd != SIOCADDMULTI && cmd != SIOCDELMULTI) 833 ; 834 else if (ifp->if_flags && IFF_RUNNING) { 835 /* Address list has changed, reconfigure filter */ 836 dme_set_rcvfilt(sc); 837 } 838 break; 839 } 840 splx(s); 841 return error; 842 } 843 844 static struct mbuf * 845 dme_alloc_receive_buffer(struct ifnet *ifp, unsigned int frame_length) 846 { 847 struct dme_softc *sc = ifp->if_softc; 848 struct mbuf *m; 849 int pad, quantum; 850 851 quantum = sc->sc_data_width; 852 MGETHDR(m, M_DONTWAIT, MT_DATA); 853 if (m == NULL) 854 return NULL; 855 856 m_set_rcvif(m, ifp); 857 /* Ensure that we always allocate an even number of 858 * bytes in order to avoid writing beyond the buffer 859 */ 860 m->m_pkthdr.len = frame_length + (frame_length % quantum); 861 pad = ALIGN(sizeof(struct ether_header)) - 862 sizeof(struct ether_header); 863 /* All our frames have the CRC attached */ 864 m->m_flags |= M_HASFCS; 865 if (m->m_pkthdr.len + pad > MHLEN) { 866 MCLGET(m, M_DONTWAIT); 867 if ((m->m_flags & M_EXT) == 0) { 868 m_freem(m); 869 return NULL; 870 } 871 } 872 873 m->m_data += pad; 874 m->m_len = frame_length + (frame_length % quantum); 875 876 return m; 877 } 878 879 static int 880 pkt_write_2(struct dme_softc *sc, struct mbuf *bufChain) 881 { 882 int left_over_count = 0; /* Number of bytes from previous mbuf, which 883 need to be written with the next.*/ 884 uint16_t left_over_buf = 0; 885 int length = 0; 886 struct mbuf *buf; 887 uint8_t *write_ptr; 888 889 /* We expect that the DM9000 has been setup to accept writes before 890 this function is called. */ 891 892 for (buf = bufChain; buf != NULL; buf = buf->m_next) { 893 int to_write = buf->m_len; 894 895 length += to_write; 896 897 write_ptr = buf->m_data; 898 while (to_write > 0 || 899 (buf->m_next == NULL && left_over_count > 0)) { 900 if (left_over_count > 0) { 901 uint8_t b = 0; 902 DPRINTF(("pkt_write_16: " 903 "Writing left over byte\n")); 904 905 if (to_write > 0) { 906 b = *write_ptr; 907 to_write--; 908 write_ptr++; 909 910 DPRINTF(("Took single byte\n")); 911 } else { 912 DPRINTF(("Leftover in last run\n")); 913 length++; 914 } 915 916 /* Does shift direction depend on endianness? */ 917 left_over_buf = left_over_buf | (b << 8); 918 919 bus_space_write_2(sc->sc_iot, sc->sc_ioh, 920 sc->dme_data, left_over_buf); 921 TX_DATA_DPRINTF(("%02X ", left_over_buf)); 922 left_over_count = 0; 923 } else if ((long)write_ptr % 2 != 0) { 924 /* Misaligned data */ 925 DPRINTF(("pkt_write_16: " 926 "Detected misaligned data\n")); 927 left_over_buf = *write_ptr; 928 left_over_count = 1; 929 write_ptr++; 930 to_write--; 931 } else { 932 int i; 933 uint16_t *dptr = (uint16_t *)write_ptr; 934 935 /* A block of aligned data. */ 936 for (i = 0; i < to_write / 2; i++) { 937 /* buf will be half-word aligned 938 * all the time 939 */ 940 bus_space_write_2(sc->sc_iot, 941 sc->sc_ioh, sc->dme_data, *dptr); 942 TX_DATA_DPRINTF(("%02X %02X ", 943 *dptr & 0xFF, (*dptr >> 8) & 0xFF)); 944 dptr++; 945 } 946 947 write_ptr += i * 2; 948 if (to_write % 2 != 0) { 949 DPRINTF(("pkt_write_16: " 950 "to_write %% 2: %d\n", 951 to_write % 2)); 952 left_over_count = 1; 953 /* XXX: Does this depend on 954 * the endianness? 955 */ 956 left_over_buf = *write_ptr; 957 958 write_ptr++; 959 to_write--; 960 DPRINTF(("pkt_write_16: " 961 "to_write (after): %d\n", 962 to_write)); 963 DPRINTF(("pkt_write_16: i * 2: %d\n", 964 i*2)); 965 } 966 to_write -= i * 2; 967 } 968 } /* while (...) */ 969 } /* for (...) */ 970 971 return length; 972 } 973 974 static int 975 pkt_read_2(struct dme_softc *sc, struct mbuf **outBuf) 976 { 977 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 978 uint8_t rx_status; 979 struct mbuf *m; 980 uint16_t data; 981 uint16_t frame_length; 982 uint16_t i; 983 uint16_t *buf; 984 985 data = bus_space_read_2(sc->sc_iot, sc->sc_ioh, sc->dme_data); 986 rx_status = data & 0xFF; 987 988 frame_length = bus_space_read_2(sc->sc_iot, 989 sc->sc_ioh, sc->dme_data); 990 if (frame_length > ETHER_MAX_LEN) { 991 printf("Got frame of length: %d\n", frame_length); 992 printf("ETHER_MAX_LEN is: %d\n", ETHER_MAX_LEN); 993 panic("Something is rotten"); 994 } 995 RX_DPRINTF(("dme_receive: rx_statux: 0x%x, frame_length: %d\n", 996 rx_status, frame_length)); 997 998 m = dme_alloc_receive_buffer(ifp, frame_length); 999 if (m == NULL) { 1000 /* 1001 * didn't get a receive buffer, so we read the rest of the 1002 * frame, throw it away and return an error 1003 */ 1004 for (i = 0; i < frame_length; i += 2) { 1005 data = bus_space_read_2(sc->sc_iot, 1006 sc->sc_ioh, sc->dme_data); 1007 } 1008 *outBuf = NULL; 1009 return 0; 1010 } 1011 1012 buf = mtod(m, uint16_t*); 1013 1014 RX_DPRINTF(("dme_receive: ")); 1015 1016 for (i = 0; i < frame_length; i += 2) { 1017 data = bus_space_read_2(sc->sc_iot, 1018 sc->sc_ioh, sc->dme_data); 1019 if ( (frame_length % 2 != 0) && 1020 (i == frame_length - 1) ) { 1021 data = data & 0xff; 1022 RX_DPRINTF((" L ")); 1023 } 1024 *buf = data; 1025 buf++; 1026 RX_DATA_DPRINTF(("%02X %02X ", data & 0xff, 1027 (data >> 8) & 0xff)); 1028 } 1029 1030 RX_DATA_DPRINTF(("\n")); 1031 RX_DPRINTF(("Read %d bytes\n", i)); 1032 1033 *outBuf = m; 1034 return rx_status; 1035 } 1036 1037 static int 1038 pkt_write_1(struct dme_softc *sc, struct mbuf *bufChain) 1039 { 1040 int length = 0, i; 1041 struct mbuf *buf; 1042 uint8_t *write_ptr; 1043 1044 /* 1045 * We expect that the DM9000 has been setup to accept writes before 1046 * this function is called. 1047 */ 1048 1049 for (buf = bufChain; buf != NULL; buf = buf->m_next) { 1050 int to_write = buf->m_len; 1051 1052 length += to_write; 1053 1054 write_ptr = buf->m_data; 1055 for (i = 0; i < to_write; i++) { 1056 bus_space_write_1(sc->sc_iot, sc->sc_ioh, 1057 sc->dme_data, *write_ptr); 1058 write_ptr++; 1059 } 1060 } /* for (...) */ 1061 1062 return length; 1063 } 1064 1065 static int 1066 pkt_read_1(struct dme_softc *sc, struct mbuf **outBuf) 1067 { 1068 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1069 uint8_t rx_status; 1070 struct mbuf *m; 1071 uint8_t *buf; 1072 uint16_t frame_length; 1073 uint16_t i, reg; 1074 uint8_t data; 1075 1076 reg = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->dme_data); 1077 reg |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->dme_data) << 8; 1078 rx_status = reg & 0xFF; 1079 1080 reg = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->dme_data); 1081 reg |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->dme_data) << 8; 1082 frame_length = reg; 1083 1084 if (frame_length > ETHER_MAX_LEN) { 1085 printf("Got frame of length: %d\n", frame_length); 1086 printf("ETHER_MAX_LEN is: %d\n", ETHER_MAX_LEN); 1087 panic("Something is rotten"); 1088 } 1089 RX_DPRINTF(("dme_receive: " 1090 "rx_statux: 0x%x, frame_length: %d\n", 1091 rx_status, frame_length)); 1092 1093 m = dme_alloc_receive_buffer(ifp, frame_length); 1094 if (m == NULL) { 1095 /* 1096 * didn't get a receive buffer, so we read the rest of the 1097 * frame, throw it away and return an error 1098 */ 1099 for (i = 0; i < frame_length; i++ ) { 1100 data = bus_space_read_2(sc->sc_iot, 1101 sc->sc_ioh, sc->dme_data); 1102 } 1103 *outBuf = NULL; 1104 return 0; 1105 } 1106 1107 buf = mtod(m, uint8_t *); 1108 1109 RX_DPRINTF(("dme_receive: ")); 1110 for (i = 0; i< frame_length; i += 1) { 1111 data = bus_space_read_1(sc->sc_iot, sc->sc_ioh, sc->dme_data); 1112 *buf = data; 1113 buf++; 1114 RX_DATA_DPRINTF(("%02X ", data)); 1115 } 1116 1117 RX_DATA_DPRINTF(("\n")); 1118 RX_DPRINTF(("Read %d bytes\n", i)); 1119 1120 *outBuf = m; 1121 return rx_status; 1122 } 1123