Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/ic/we.c
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1 /* $NetBSD: we.c,v 1.17 2010/03/19 15:59:22 tsutsui 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 35 * adapters. 36 * 37 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 38 * 39 * Copyright (C) 1993, David Greenman. This software may be used, modified, 40 * copied, distributed, and sold, in both source and binary form provided that 41 * the above copyright and these terms are retained. Under no circumstances is 42 * the author responsible for the proper functioning of this software, nor does 43 * the author assume any responsibility for damages incurred with its use. 44 */ 45 46 /* 47 * Device driver for the Western Digital/SMC 8003 and 8013 series, 48 * and the SMC Elite Ultra (8216). 49 */ 50 51 #include <sys/cdefs.h> 52 __KERNEL_RCSID(0, "$NetBSD: we.c,v 1.17 2010/03/19 15:59:22 tsutsui Exp $"); 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/device.h> 57 #include <sys/socket.h> 58 #include <sys/mbuf.h> 59 #include <sys/syslog.h> 60 61 #include <net/if.h> 62 #include <net/if_dl.h> 63 #include <net/if_types.h> 64 #include <net/if_media.h> 65 66 #include <net/if_ether.h> 67 68 #include <sys/bus.h> 69 #include <sys/bswap.h> 70 #include <sys/intr.h> 71 72 #include <dev/isa/isareg.h> 73 #include <dev/isa/isavar.h> 74 75 #include <dev/ic/dp8390reg.h> 76 #include <dev/ic/dp8390var.h> 77 #include <dev/ic/wereg.h> 78 #include <dev/ic/wevar.h> 79 80 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 81 #define bus_space_read_region_stream_2 bus_space_read_region_2 82 #define bus_space_write_stream_2 bus_space_write_2 83 #define bus_space_write_region_stream_2 bus_space_write_region_2 84 #endif 85 86 static void we_set_media(struct we_softc *, int); 87 88 static void we_media_init(struct dp8390_softc *); 89 90 static int we_mediachange(struct dp8390_softc *); 91 static void we_mediastatus(struct dp8390_softc *, struct ifmediareq *); 92 93 static void we_recv_int(struct dp8390_softc *); 94 static void we_init_card(struct dp8390_softc *); 95 static int we_write_mbuf(struct dp8390_softc *, struct mbuf *, int); 96 static int we_ring_copy(struct dp8390_softc *, int, void *, u_short); 97 static void we_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *); 98 static int we_test_mem(struct dp8390_softc *); 99 100 static inline void we_readmem(struct we_softc *, int, uint8_t *, int); 101 102 /* 103 * Delay needed when switching 16-bit access to shared memory. 104 */ 105 #define WE_DELAY(wsc) delay(3) 106 107 /* 108 * Enable card RAM, and 16-bit access. 109 */ 110 #define WE_MEM_ENABLE(wsc) \ 111 if (((wsc)->sc_flags & WE_16BIT_NOTOGGLE) == 0) { \ 112 if ((wsc)->sc_flags & WE_16BIT_ENABLE) \ 113 bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \ 114 WE_LAAR, (wsc)->sc_laar_proto | WE_LAAR_M16EN); \ 115 bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \ 116 WE_MSR, wsc->sc_msr_proto | WE_MSR_MENB); \ 117 WE_DELAY((wsc)); \ 118 } 119 120 /* 121 * Disable card RAM, and 16-bit access. 122 */ 123 #define WE_MEM_DISABLE(wsc) \ 124 if (((wsc)->sc_flags & WE_16BIT_NOTOGGLE) == 0) { \ 125 bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \ 126 WE_MSR, (wsc)->sc_msr_proto); \ 127 if ((wsc)->sc_flags & WE_16BIT_ENABLE) \ 128 bus_space_write_1((wsc)->sc_asict, (wsc)->sc_asich, \ 129 WE_LAAR, (wsc)->sc_laar_proto); \ 130 WE_DELAY((wsc)); \ 131 } 132 133 int 134 we_config(device_t self, struct we_softc *wsc, const char *typestr) 135 { 136 struct dp8390_softc *sc = &wsc->sc_dp8390; 137 uint8_t x; 138 int i, forced_16bit = 0; 139 140 /* 141 * Allow user to override 16-bit mode. 8-bit takes precedence. 142 */ 143 if (device_cfdata(self)->cf_flags & DP8390_FORCE_16BIT_MODE) { 144 wsc->sc_flags |= WE_16BIT_ENABLE; 145 forced_16bit = 1; 146 } 147 if (device_cfdata(self)->cf_flags & DP8390_FORCE_8BIT_MODE) 148 wsc->sc_flags &= ~WE_16BIT_ENABLE; 149 150 /* Registers are linear. */ 151 for (i = 0; i < 16; i++) 152 sc->sc_reg_map[i] = i; 153 154 /* Now we can use the NIC_{GET,PUT}() macros. */ 155 156 aprint_normal_dev(self, "%s Ethernet (%s-bit)\n", 157 typestr, wsc->sc_flags & WE_16BIT_ENABLE ? "16" : "8"); 158 159 /* Get station address from EEPROM. */ 160 for (i = 0; i < ETHER_ADDR_LEN; i++) 161 sc->sc_enaddr[i] = 162 bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE_PROM + i); 163 164 /* 165 * Set upper address bits and 8/16 bit access to shared memory. 166 */ 167 if (sc->is790) { 168 wsc->sc_laar_proto = 169 bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE_LAAR) & 170 ~WE_LAAR_M16EN; 171 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_LAAR, 172 wsc->sc_laar_proto | 173 (wsc->sc_flags & WE_16BIT_ENABLE ? WE_LAAR_M16EN : 0)); 174 } else if ((wsc->sc_type & WE_SOFTCONFIG) || 175 #ifdef TOSH_ETHER 176 (wsc->sc_type == WE_TYPE_TOSHIBA1) || 177 (wsc->sc_type == WE_TYPE_TOSHIBA4) || 178 #endif 179 (forced_16bit) || 180 (wsc->sc_type == WE_TYPE_WD8013EBT)) { 181 wsc->sc_laar_proto = (wsc->sc_maddr >> 19) & WE_LAAR_ADDRHI; 182 if (wsc->sc_flags & WE_16BIT_ENABLE) 183 wsc->sc_laar_proto |= WE_LAAR_L16EN; 184 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_LAAR, 185 wsc->sc_laar_proto | 186 (wsc->sc_flags & WE_16BIT_ENABLE ? WE_LAAR_M16EN : 0)); 187 } 188 189 /* 190 * Set address and enable interface shared memory. 191 */ 192 if (sc->is790) { 193 x = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR); 194 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, 195 WE790_HWR, x | WE790_HWR_SWH); 196 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE790_RAR, 197 ((wsc->sc_maddr >> WE790_RAR_OFF_SHIFT) & WE790_RAR_OFF) | 198 ((wsc->sc_maddr & (1 << WE790_RAR_BASE_SHIFT)) != 0 ? 199 WE790_RAR_BASE1 : WE790_RAR_BASE0) | 200 (bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE790_RAR) & 201 ~(WE790_RAR_OFF | WE790_RAR_BASE))); 202 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR, x); 203 wsc->sc_msr_proto = 0x00; 204 sc->cr_proto = 0x00; 205 } else { 206 #ifdef TOSH_ETHER 207 if (wsc->sc_type == WE_TYPE_TOSHIBA1 || 208 wsc->sc_type == WE_TYPE_TOSHIBA4) { 209 /* XXX MAGIC CONSTANTS XXX */ 210 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, 211 WE_MSR + 1, 212 ((wsc->sc_maddr >> 8) & 0xe0) | 0x04); 213 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, 214 WE_MSR + 2, 215 ((wsc->sc_maddr >> 16) & 0x0f)); 216 wsc->sc_msr_proto = WE_MSR_POW; 217 } else 218 #endif 219 wsc->sc_msr_proto = (wsc->sc_maddr >> 13) & 220 WE_MSR_ADDR; 221 222 sc->cr_proto = ED_CR_RD2; 223 } 224 225 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_MSR, 226 wsc->sc_msr_proto | WE_MSR_MENB); 227 WE_DELAY(wsc); 228 229 /* 230 * DCR gets: 231 * 232 * FIFO threshold to 8, No auto-init Remote DMA, 233 * byte order=80x86. 234 * 235 * 16-bit cards also get word-wide DMA transfers. 236 */ 237 sc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | 238 (wsc->sc_flags & WE_16BIT_ENABLE ? ED_DCR_WTS : 0); 239 240 sc->test_mem = we_test_mem; 241 sc->ring_copy = we_ring_copy; 242 sc->write_mbuf = we_write_mbuf; 243 sc->read_hdr = we_read_hdr; 244 sc->recv_int = we_recv_int; 245 sc->init_card = we_init_card; 246 247 sc->sc_mediachange = we_mediachange; 248 sc->sc_mediastatus = we_mediastatus; 249 250 sc->mem_start = 0; 251 /* sc->mem_size has to be set by frontend */ 252 253 sc->sc_flags = device_cfdata(self)->cf_flags; 254 255 /* Do generic parts of attach. */ 256 if (wsc->sc_type & WE_SOFTCONFIG) 257 sc->sc_media_init = we_media_init; 258 else 259 sc->sc_media_init = dp8390_media_init; 260 if (dp8390_config(sc)) { 261 aprint_error_dev(self, "configuration failed\n"); 262 return 1; 263 } 264 265 /* 266 * Disable 16-bit access to shared memory - we leave it disabled 267 * so that: 268 * 269 * (1) machines reboot properly when the board is set to 270 * 16-bit mode and there are conflicting 8-bit devices 271 * within the same 128k address space as this board's 272 * shared memory, and 273 * 274 * (2) so that other 8-bit devices with shared memory 275 * in this same 128k address space will work. 276 */ 277 WE_MEM_DISABLE(wsc); 278 279 return 0; 280 } 281 282 static int 283 we_test_mem(struct dp8390_softc *sc) 284 { 285 struct we_softc *wsc = (struct we_softc *)sc; 286 bus_space_tag_t memt = sc->sc_buft; 287 bus_space_handle_t memh = sc->sc_bufh; 288 bus_size_t memsize = sc->mem_size; 289 int i; 290 291 if (wsc->sc_flags & WE_16BIT_ENABLE) 292 bus_space_set_region_2(memt, memh, 0, 0, memsize >> 1); 293 else 294 bus_space_set_region_1(memt, memh, 0, 0, memsize); 295 296 if (wsc->sc_flags & WE_16BIT_ENABLE) { 297 for (i = 0; i < memsize; i += 2) { 298 if (bus_space_read_2(memt, memh, i) != 0) 299 goto fail; 300 } 301 } else { 302 for (i = 0; i < memsize; i++) { 303 if (bus_space_read_1(memt, memh, i) != 0) 304 goto fail; 305 } 306 } 307 308 return 0; 309 310 fail: 311 aprint_error_dev(sc->sc_dev, 312 "failed to clear shared memory at offset 0x%x\n", i); 313 WE_MEM_DISABLE(wsc); 314 return 1; 315 } 316 317 /* 318 * Given a NIC memory source address and a host memory destination address, 319 * copy 'len' from NIC to host using shared memory. The 'len' is rounded 320 * up to a word - ok as long as mbufs are word-sized. 321 */ 322 static inline void 323 we_readmem(struct we_softc *wsc, int from, uint8_t *to, int len) 324 { 325 bus_space_tag_t memt = wsc->sc_dp8390.sc_buft; 326 bus_space_handle_t memh = wsc->sc_dp8390.sc_bufh; 327 328 if (len & 1) 329 ++len; 330 331 if (wsc->sc_flags & WE_16BIT_ENABLE) 332 bus_space_read_region_stream_2(memt, memh, from, 333 (uint16_t *)to, len >> 1); 334 else 335 bus_space_read_region_1(memt, memh, from, 336 to, len); 337 } 338 339 static int 340 we_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) 341 { 342 struct we_softc *wsc = (struct we_softc *)sc; 343 bus_space_tag_t memt = wsc->sc_dp8390.sc_buft; 344 bus_space_handle_t memh = wsc->sc_dp8390.sc_bufh; 345 uint8_t *data, savebyte[2]; 346 int savelen, len, leftover; 347 #ifdef DIAGNOSTIC 348 uint8_t *lim; 349 #endif 350 351 savelen = m->m_pkthdr.len; 352 353 WE_MEM_ENABLE(wsc); 354 355 /* 356 * 8-bit boards are simple; no alignment tricks are necessary. 357 */ 358 if ((wsc->sc_flags & WE_16BIT_ENABLE) == 0) { 359 for (; m != NULL; buf += m->m_len, m = m->m_next) 360 bus_space_write_region_1(memt, memh, 361 buf, mtod(m, uint8_t *), m->m_len); 362 if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) { 363 bus_space_set_region_1(memt, memh, 364 buf, 0, ETHER_MIN_LEN - ETHER_CRC_LEN - savelen); 365 savelen = ETHER_MIN_LEN - ETHER_CRC_LEN; 366 } 367 goto out; 368 } 369 370 /* Start out with no leftover data. */ 371 leftover = 0; 372 savebyte[0] = savebyte[1] = 0; 373 374 for (; m != NULL; m = m->m_next) { 375 len = m->m_len; 376 if (len == 0) 377 continue; 378 data = mtod(m, uint8_t *); 379 #ifdef DIAGNOSTIC 380 lim = data + len; 381 #endif 382 while (len > 0) { 383 if (leftover) { 384 /* 385 * Data left over (from mbuf or realignment). 386 * Buffer the next byte, and write it and 387 * the leftover data out. 388 */ 389 savebyte[1] = *data++; 390 len--; 391 bus_space_write_stream_2(memt, memh, buf, 392 *(uint16_t *)savebyte); 393 buf += 2; 394 leftover = 0; 395 } else if (BUS_SPACE_ALIGNED_POINTER(data, uint16_t) 396 == 0) { 397 /* 398 * Unaligned dta; buffer the next byte. 399 */ 400 savebyte[0] = *data++; 401 len--; 402 leftover = 1; 403 } else { 404 /* 405 * Aligned data; output contiguous words as 406 * much as we can, then buffer the remaining 407 * byte, if any. 408 */ 409 leftover = len & 1; 410 len &= ~1; 411 bus_space_write_region_stream_2(memt, memh, 412 buf, (uint16_t *)data, len >> 1); 413 data += len; 414 buf += len; 415 if (leftover) 416 savebyte[0] = *data++; 417 len = 0; 418 } 419 } 420 if (len < 0) 421 panic("we_write_mbuf: negative len"); 422 #ifdef DIAGNOSTIC 423 if (data != lim) 424 panic("we_write_mbuf: data != lim"); 425 #endif 426 } 427 if (leftover) { 428 savebyte[1] = 0; 429 bus_space_write_stream_2(memt, memh, buf, 430 *(uint16_t *)savebyte); 431 buf += 2; 432 } 433 if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) { 434 bus_space_set_region_2(memt, memh, 435 buf, 0, (ETHER_MIN_LEN - ETHER_CRC_LEN - savelen) >> 1); 436 savelen = ETHER_MIN_LEN - ETHER_CRC_LEN; 437 } 438 439 out: 440 WE_MEM_DISABLE(wsc); 441 442 return savelen; 443 } 444 445 static int 446 we_ring_copy(struct dp8390_softc *sc, int src, void *dstv, u_short amount) 447 { 448 uint8_t *dst = dstv; 449 struct we_softc *wsc = (struct we_softc *)sc; 450 u_short tmp_amount; 451 452 /* Does copy wrap to lower addr in ring buffer? */ 453 if (src + amount > sc->mem_end) { 454 tmp_amount = sc->mem_end - src; 455 456 /* Copy amount up to end of NIC memory. */ 457 we_readmem(wsc, src, dst, tmp_amount); 458 459 amount -= tmp_amount; 460 src = sc->mem_ring; 461 dst += tmp_amount; 462 } 463 464 we_readmem(wsc, src, dst, amount); 465 466 return src + amount; 467 } 468 469 static void 470 we_read_hdr(struct dp8390_softc *sc, int packet_ptr, 471 struct dp8390_ring *packet_hdrp) 472 { 473 struct we_softc *wsc = (struct we_softc *)sc; 474 475 we_readmem(wsc, packet_ptr, (uint8_t *)packet_hdrp, 476 sizeof(struct dp8390_ring)); 477 #if BYTE_ORDER == BIG_ENDIAN 478 packet_hdrp->count = bswap16(packet_hdrp->count); 479 #endif 480 } 481 482 static void 483 we_recv_int(struct dp8390_softc *sc) 484 { 485 struct we_softc *wsc = (struct we_softc *)sc; 486 487 WE_MEM_ENABLE(wsc); 488 dp8390_rint(sc); 489 WE_MEM_DISABLE(wsc); 490 } 491 492 static void 493 we_media_init(struct dp8390_softc *sc) 494 { 495 struct we_softc *wsc = (struct we_softc *)sc; 496 int defmedia = IFM_ETHER; 497 uint8_t x; 498 499 if (sc->is790) { 500 x = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR); 501 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR, 502 x | WE790_HWR_SWH); 503 if (bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE790_GCR) & 504 WE790_GCR_GPOUT) 505 defmedia |= IFM_10_2; 506 else 507 defmedia |= IFM_10_5; 508 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE790_HWR, 509 x & ~WE790_HWR_SWH); 510 } else { 511 x = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE_IRR); 512 if (x & WE_IRR_OUT2) 513 defmedia |= IFM_10_2; 514 else 515 defmedia |= IFM_10_5; 516 } 517 518 ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus); 519 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_10_2, 0, NULL); 520 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_10_5, 0, NULL); 521 ifmedia_set(&sc->sc_media, defmedia); 522 } 523 524 static int 525 we_mediachange(struct dp8390_softc *sc) 526 { 527 528 /* 529 * Current media is already set up. Just reset the interface 530 * to let the new value take hold. The new media will be 531 * set up in we_init_card() called via dp8390_init(). 532 */ 533 dp8390_reset(sc); 534 return 0; 535 } 536 537 static void 538 we_mediastatus(struct dp8390_softc *sc, struct ifmediareq *ifmr) 539 { 540 struct ifmedia *ifm = &sc->sc_media; 541 542 /* 543 * The currently selected media is always the active media. 544 */ 545 ifmr->ifm_active = ifm->ifm_cur->ifm_media; 546 } 547 548 static void 549 we_init_card(struct dp8390_softc *sc) 550 { 551 struct we_softc *wsc = (struct we_softc *)sc; 552 struct ifmedia *ifm = &sc->sc_media; 553 554 if (wsc->sc_init_hook) 555 (*wsc->sc_init_hook)(wsc); 556 557 we_set_media(wsc, ifm->ifm_cur->ifm_media); 558 } 559 560 static void 561 we_set_media(struct we_softc *wsc, int media) 562 { 563 struct dp8390_softc *sc = &wsc->sc_dp8390; 564 bus_space_tag_t asict = wsc->sc_asict; 565 bus_space_handle_t asich = wsc->sc_asich; 566 uint8_t hwr, gcr, irr; 567 568 if (sc->is790) { 569 hwr = bus_space_read_1(asict, asich, WE790_HWR); 570 bus_space_write_1(asict, asich, WE790_HWR, 571 hwr | WE790_HWR_SWH); 572 gcr = bus_space_read_1(asict, asich, WE790_GCR); 573 if (IFM_SUBTYPE(media) == IFM_10_2) 574 gcr |= WE790_GCR_GPOUT; 575 else 576 gcr &= ~WE790_GCR_GPOUT; 577 bus_space_write_1(asict, asich, WE790_GCR, 578 gcr | WE790_GCR_LIT); 579 bus_space_write_1(asict, asich, WE790_HWR, 580 hwr & ~WE790_HWR_SWH); 581 return; 582 } 583 584 irr = bus_space_read_1(wsc->sc_asict, wsc->sc_asich, WE_IRR); 585 if (IFM_SUBTYPE(media) == IFM_10_2) 586 irr |= WE_IRR_OUT2; 587 else 588 irr &= ~WE_IRR_OUT2; 589 bus_space_write_1(wsc->sc_asict, wsc->sc_asich, WE_IRR, irr); 590 }
Cache object: a0fc8da027c6f2cee756c62c8aac634c
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