1 /* $NetBSD: ne2000.c,v 1.79 2024/05/21 08:04:20 andvar 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 * Common code shared by all NE2000-compatible Ethernet interfaces. 48 */ 49 50 #include <sys/cdefs.h> 51 __KERNEL_RCSID(0, "$NetBSD: ne2000.c,v 1.79 2024/05/21 08:04:20 andvar Exp $"); 52 53 #include "rtl80x9.h" 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/device.h> 58 #include <sys/socket.h> 59 #include <sys/mbuf.h> 60 #include <sys/syslog.h> 61 62 #include <net/if.h> 63 #include <net/if_dl.h> 64 #include <net/if_types.h> 65 #include <net/if_media.h> 66 67 #include <net/if_ether.h> 68 69 #include <sys/bswap.h> 70 #include <sys/bus.h> 71 72 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 73 #define bus_space_write_stream_2 bus_space_write_2 74 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 75 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 76 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 77 78 #include <dev/ic/dp8390reg.h> 79 #include <dev/ic/dp8390var.h> 80 81 #include <dev/ic/ne2000reg.h> 82 #include <dev/ic/ne2000var.h> 83 84 #include <dev/ic/rtl80x9reg.h> 85 #include <dev/ic/rtl80x9var.h> 86 87 #include <dev/ic/ax88190reg.h> 88 89 static int ne2000_write_mbuf(struct dp8390_softc *, struct mbuf *, int); 90 static int ne2000_ring_copy(struct dp8390_softc *, int, void *, u_short); 91 static void ne2000_read_hdr(struct dp8390_softc *, int, 92 struct dp8390_ring *); 93 static int ne2000_test_mem(struct dp8390_softc *); 94 95 static void ne2000_writemem(bus_space_tag_t, bus_space_handle_t, 96 bus_space_tag_t, bus_space_handle_t, const uint8_t *, int, 97 size_t, int, int); 98 static void ne2000_readmem(bus_space_tag_t, bus_space_handle_t, 99 bus_space_tag_t, bus_space_handle_t, int, uint8_t *, 100 size_t, int); 101 102 #ifdef NE2000_DETECT_8BIT 103 static bool ne2000_detect_8bit(bus_space_tag_t, bus_space_handle_t, 104 bus_space_tag_t, bus_space_handle_t); 105 #endif 106 107 #define ASIC_BARRIER(asict, asich) \ 108 bus_space_barrier((asict), (asich), 0, 0x10, \ 109 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE) 110 111 int 112 ne2000_attach(struct ne2000_softc *nsc, uint8_t *myea) 113 { 114 struct dp8390_softc *dsc = &nsc->sc_dp8390; 115 bus_space_tag_t nict = dsc->sc_regt; 116 bus_space_handle_t nich = dsc->sc_regh; 117 bus_space_tag_t asict = nsc->sc_asict; 118 bus_space_handle_t asich = nsc->sc_asich; 119 uint8_t romdata[16]; 120 int memstart, memsize, i, useword; 121 122 /* 123 * Detect it again unless caller specified it; this gives us 124 * the memory size. 125 */ 126 if (nsc->sc_type == NE2000_TYPE_UNKNOWN) 127 nsc->sc_type = ne2000_detect(nict, nich, asict, asich); 128 129 /* 130 * 8k of memory for NE1000, 16k for NE2000 and 24k for the 131 * card uses DL10019. 132 */ 133 switch (nsc->sc_type) { 134 case NE2000_TYPE_UNKNOWN: 135 default: 136 aprint_error_dev(dsc->sc_dev, "where did the card go?\n"); 137 return 1; 138 case NE2000_TYPE_NE1000: 139 memstart = 8192; 140 memsize = 8192; 141 useword = 0; 142 break; 143 case NE2000_TYPE_NE2000: 144 case NE2000_TYPE_AX88190: /* XXX really? */ 145 case NE2000_TYPE_AX88790: 146 case NE2000_TYPE_AX88796: 147 #if NRTL80X9 > 0 148 case NE2000_TYPE_RTL8019: 149 #endif 150 memstart = 16384; 151 memsize = 16384; 152 useword = 1; 153 154 if ( 155 #ifdef NE2000_DETECT_8BIT 156 ne2000_detect_8bit(nict, nich, asict, asich) || 157 #endif 158 (nsc->sc_quirk & NE2000_QUIRK_8BIT) != 0) { 159 /* in 8 bit mode, only 8KB memory can be used */ 160 memsize = 8192; 161 useword = 0; 162 } 163 break; 164 case NE2000_TYPE_DL10019: 165 case NE2000_TYPE_DL10022: 166 memstart = 8192 * 3; 167 memsize = 8192 * 3; 168 useword = 1; 169 break; 170 } 171 172 nsc->sc_useword = useword; 173 #if NRTL80X9 > 0 174 if (nsc->sc_type == NE2000_TYPE_RTL8019) { 175 dsc->init_card = rtl80x9_init_card; 176 dsc->sc_media_init = rtl80x9_media_init; 177 dsc->sc_mediachange = rtl80x9_mediachange; 178 dsc->sc_mediastatus = rtl80x9_mediastatus; 179 } 180 #endif 181 182 dsc->cr_proto = ED_CR_RD2; 183 if (nsc->sc_type == NE2000_TYPE_AX88190 || 184 nsc->sc_type == NE2000_TYPE_AX88790) { 185 dsc->rcr_proto = ED_RCR_INTT; 186 dsc->sc_flags |= DP8390_DO_AX88190_WORKAROUND; 187 } else 188 dsc->rcr_proto = 0; 189 190 /* 191 * DCR gets: 192 * 193 * FIFO threshold to 8, No auto-init Remote DMA, 194 * byte order=80x86. 195 * 196 * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA. 197 */ 198 dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0); 199 200 dsc->test_mem = ne2000_test_mem; 201 dsc->ring_copy = ne2000_ring_copy; 202 dsc->write_mbuf = ne2000_write_mbuf; 203 dsc->read_hdr = ne2000_read_hdr; 204 205 /* Registers are linear. */ 206 for (i = 0; i < 16; i++) 207 dsc->sc_reg_map[i] = i; 208 209 /* 210 * NIC memory doesn't start at zero on an NE board. 211 * The start address is tied to the bus width. 212 */ 213 #ifdef GWETHER 214 { 215 int x; 216 int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE], 217 tbuf[ED_PAGE_SIZE]; 218 219 memstart = 0; 220 for (i = 0; i < ED_PAGE_SIZE; i++) 221 pbuf0[i] = 0; 222 223 /* Search for the start of RAM. */ 224 for (x = 1; x < 256; x++) { 225 ne2000_writemem(nict, nich, asict, asich, pbuf0, 226 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 227 ne2000_readmem(nict, nich, asict, asich, 228 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 229 if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 230 for (i = 0; i < ED_PAGE_SIZE; i++) 231 pbuf[i] = 255 - x; 232 ne2000_writemem(nict, nich, asict, asich, 233 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 234 useword, 0); 235 ne2000_readmem(nict, nich, asict, asich, 236 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 237 useword); 238 if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) { 239 memstart = x << ED_PAGE_SHIFT; 240 memsize = ED_PAGE_SIZE; 241 break; 242 } 243 } 244 } 245 246 if (memstart == 0) { 247 aprint_error_dev(dsc->sc_dev, 248 "cannot find start of RAM\n"); 249 return 1; 250 } 251 252 /* Search for the end of RAM. */ 253 for (++x; x < 256; x++) { 254 ne2000_writemem(nict, nich, asict, asich, pbuf0, 255 x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword, 0); 256 ne2000_readmem(nict, nich, asict, asich, 257 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword); 258 if (memcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) { 259 for (i = 0; i < ED_PAGE_SIZE; i++) 260 pbuf[i] = 255 - x; 261 ne2000_writemem(nict, nich, asict, asich, 262 pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE, 263 useword, 0); 264 ne2000_readmem(nict, nich, asict, asich, 265 x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, 266 useword); 267 if (memcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) 268 memsize += ED_PAGE_SIZE; 269 else 270 break; 271 } else 272 break; 273 } 274 275 printf("%s: RAM start 0x%x, size %d\n", 276 device_xname(dsc->sc_dev), memstart, memsize); 277 } 278 #endif /* GWETHER */ 279 dsc->mem_start = memstart; 280 281 dsc->mem_size = memsize; 282 283 if (myea == NULL) { 284 /* Read the station address. */ 285 if (nsc->sc_type == NE2000_TYPE_AX88190 || 286 nsc->sc_type == NE2000_TYPE_AX88790 || 287 nsc->sc_type == NE2000_TYPE_AX88796) { 288 /* Select page 0 registers. */ 289 NIC_BARRIER(nict, nich); 290 bus_space_write_1(nict, nich, ED_P0_CR, 291 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 292 NIC_BARRIER(nict, nich); 293 /* Select word transfer. */ 294 bus_space_write_1(nict, nich, ED_P0_DCR, 295 useword ? ED_DCR_WTS : 0); 296 NIC_BARRIER(nict, nich); 297 ne2000_readmem(nict, nich, asict, asich, 298 AX88190_NODEID_OFFSET, dsc->sc_enaddr, 299 ETHER_ADDR_LEN, useword); 300 } else { 301 bool ne1000 = (nsc->sc_type == NE2000_TYPE_NE1000); 302 303 ne2000_readmem(nict, nich, asict, asich, 0, romdata, 304 sizeof(romdata), useword); 305 for (i = 0; i < ETHER_ADDR_LEN; i++) 306 dsc->sc_enaddr[i] = 307 romdata[i * (ne1000 ? 1 : 2)]; 308 } 309 } else 310 memcpy(dsc->sc_enaddr, myea, sizeof(dsc->sc_enaddr)); 311 312 /* Clear any pending interrupts that might have occurred above. */ 313 NIC_BARRIER(nict, nich); 314 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 315 NIC_BARRIER(nict, nich); 316 317 if (dsc->sc_media_init == NULL) 318 dsc->sc_media_init = dp8390_media_init; 319 320 if (dp8390_config(dsc)) { 321 aprint_error_dev(dsc->sc_dev, "setup failed\n"); 322 return 1; 323 } 324 325 return 0; 326 } 327 328 /* 329 * Detect an NE-2000 or compatible. Returns a model code. 330 */ 331 int 332 ne2000_detect(bus_space_tag_t nict, bus_space_handle_t nich, 333 bus_space_tag_t asict, bus_space_handle_t asich) 334 { 335 const uint8_t test_pattern[32] = "THIS is A memory TEST pattern"; 336 uint8_t test_buffer[32], tmp; 337 int i, rv = NE2000_TYPE_UNKNOWN; 338 int useword; 339 340 /* Reset the board. */ 341 #ifdef GWETHER 342 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0); 343 ASIC_BARRIER(asict, asich); 344 delay(200); 345 #endif /* GWETHER */ 346 tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET); 347 ASIC_BARRIER(asict, asich); 348 delay(10000); 349 350 /* 351 * I don't know if this is necessary; probably cruft leftover from 352 * Clarkson packet driver code. Doesn't do a thing on the boards I've 353 * tested. -DG [note that a outb(0x84, 0) seems to work here, and is 354 * non-invasive...but some boards don't seem to reset and I don't have 355 * complete documentation on what the 'right' thing to do is...so we do 356 * the invasive thing for now. Yuck.] 357 */ 358 bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp); 359 ASIC_BARRIER(asict, asich); 360 delay(5000); 361 362 /* 363 * This is needed because some NE clones apparently don't reset the 364 * NIC properly (or the NIC chip doesn't reset fully on power-up). 365 * XXX - this makes the probe invasive! Done against my better 366 * judgement. -DLG 367 */ 368 bus_space_write_1(nict, nich, ED_P0_CR, 369 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP); 370 NIC_BARRIER(nict, nich); 371 372 delay(5000); 373 374 /* 375 * Generic probe routine for testing for the existence of a DS8390. 376 * Must be performed after the NIC has just been reset. This 377 * works by looking at certain register values that are guaranteed 378 * to be initialized a certain way after power-up or reset. 379 * 380 * Specifically: 381 * 382 * Register reset bits set bits 383 * -------- ---------- -------- 384 * CR TXP, STA RD2, STP 385 * ISR RST 386 * IMR <all> 387 * DCR LAS 388 * TCR LB1, LB0 389 * 390 * We only look at CR and ISR, however, since looking at the others 391 * would require changing register pages, which would be intrusive 392 * if this isn't an 8390. 393 */ 394 395 tmp = bus_space_read_1(nict, nich, ED_P0_CR); 396 if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) != 397 (ED_CR_RD2 | ED_CR_STP)) 398 goto out; 399 400 tmp = bus_space_read_1(nict, nich, ED_P0_ISR); 401 if ((tmp & ED_ISR_RST) != ED_ISR_RST) 402 goto out; 403 404 bus_space_write_1(nict, nich, 405 ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 406 NIC_BARRIER(nict, nich); 407 408 for (i = 0; i < 100; i++) { 409 if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) == 410 ED_ISR_RST) { 411 /* Ack the reset bit. */ 412 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST); 413 NIC_BARRIER(nict, nich); 414 break; 415 } 416 delay(100); 417 } 418 419 #if 0 420 /* XXX */ 421 if (i == 100) 422 goto out; 423 #endif 424 425 /* 426 * Test the ability to read and write to the NIC memory. This has 427 * the side effect of determining if this is an NE1000 or an NE2000. 428 */ 429 430 /* 431 * This prevents packets from being stored in the NIC memory when 432 * the readmem routine turns on the start bit in the CR. 433 */ 434 bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON); 435 NIC_BARRIER(nict, nich); 436 437 /* Temporarily initialize DCR for byte operations. */ 438 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 439 440 bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT); 441 bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT); 442 443 /* 444 * Write a test pattern in byte mode. If this fails, then there 445 * probably isn't any memory at 8k - which likely means that the 446 * board is an NE2000. 447 */ 448 ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192, 449 sizeof(test_pattern), 0, 1); 450 ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer, 451 sizeof(test_buffer), 0); 452 453 if (memcmp(test_pattern, test_buffer, sizeof(test_pattern)) == 0) { 454 /* We're an NE1000. */ 455 rv = NE2000_TYPE_NE1000; 456 goto out; 457 } 458 459 /* not an NE1000 - try NE2000 */ 460 461 /* try 16 bit mode first */ 462 useword = 1; 463 464 #ifdef NE2000_DETECT_8BIT 465 /* 466 * Check bus type in EEPROM first because some NE2000 compatible wedges 467 * on 16 bit DMA access if the chip is configured in 8 bit mode. 468 */ 469 if (ne2000_detect_8bit(nict, nich, asict, asich)) 470 useword = 0; 471 #endif 472 again: 473 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS | 474 (useword ? ED_DCR_WTS : 0)); 475 bus_space_write_1(nict, nich, ED_P0_PSTART, 16384 >> ED_PAGE_SHIFT); 476 bus_space_write_1(nict, nich, ED_P0_PSTOP, 477 (16384 + (useword ? 16384 : 8192)) >> ED_PAGE_SHIFT); 478 479 /* 480 * Write the test pattern in word mode. If this also fails, 481 * then we don't know what this board is. 482 */ 483 ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384, 484 sizeof(test_pattern), useword, 1); 485 ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer, 486 sizeof(test_buffer), useword); 487 488 if (memcmp(test_pattern, test_buffer, sizeof(test_pattern)) != 0) { 489 if (useword == 1) { 490 /* try 8 bit mode */ 491 useword = 0; 492 goto again; 493 } 494 return NE2000_TYPE_UNKNOWN; /* not an NE2000 either */ 495 } 496 497 rv = NE2000_TYPE_NE2000; 498 499 #if NRTL80X9 > 0 500 /* Check for a Realtek RTL8019. */ 501 if (bus_space_read_1(nict, nich, NERTL_RTL0_8019ID0) == RTL0_8019ID0 && 502 bus_space_read_1(nict, nich, NERTL_RTL0_8019ID1) == RTL0_8019ID1) 503 rv = NE2000_TYPE_RTL8019; 504 #endif 505 506 out: 507 /* Clear any pending interrupts that might have occurred above. */ 508 NIC_BARRIER(nict, nich); 509 bus_space_write_1(nict, nich, ED_P0_ISR, 0xff); 510 511 return rv; 512 } 513 514 #ifdef NE2000_DETECT_8BIT 515 static bool 516 ne2000_detect_8bit(bus_space_tag_t nict, bus_space_handle_t nich, 517 bus_space_tag_t asict, bus_space_handle_t asich) 518 { 519 bool is8bit; 520 uint8_t romdata[32]; 521 522 is8bit = false; 523 524 /* Set DCR for 8 bit DMA. */ 525 bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 526 /* Read PROM area. */ 527 ne2000_readmem(nict, nich, asict, asich, 0, romdata, 528 sizeof(romdata), 0); 529 if (romdata[28] == 'B' && romdata[30] == 'B') { 530 /* 'B' (0x42) in 8 bit mode, 'W' (0x57) in 16 bit mode */ 531 is8bit = true; 532 } 533 if (!is8bit) { 534 /* not in 8 bit mode; put back DCR setting for 16 bit DMA */ 535 bus_space_write_1(nict, nich, ED_P0_DCR, 536 ED_DCR_FT1 | ED_DCR_LS | ED_DCR_WTS); 537 } 538 539 return is8bit; 540 } 541 #endif 542 543 /* 544 * Write an mbuf chain to the destination NIC memory address using programmed 545 * I/O. 546 */ 547 int 548 ne2000_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) 549 { 550 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 551 bus_space_tag_t nict = sc->sc_regt; 552 bus_space_handle_t nich = sc->sc_regh; 553 bus_space_tag_t asict = nsc->sc_asict; 554 bus_space_handle_t asich = nsc->sc_asich; 555 int savelen, padlen; 556 int maxwait = 100; /* about 120us */ 557 558 savelen = m->m_pkthdr.len; 559 if (savelen < ETHER_MIN_LEN - ETHER_CRC_LEN) { 560 padlen = ETHER_MIN_LEN - ETHER_CRC_LEN - savelen; 561 savelen = ETHER_MIN_LEN - ETHER_CRC_LEN; 562 } else 563 padlen = 0; 564 565 566 /* Select page 0 registers. */ 567 NIC_BARRIER(nict, nich); 568 bus_space_write_1(nict, nich, ED_P0_CR, 569 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 570 NIC_BARRIER(nict, nich); 571 572 /* Reset remote DMA complete flag. */ 573 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 574 NIC_BARRIER(nict, nich); 575 576 /* Set up DMA byte count. */ 577 bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen); 578 bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8); 579 580 /* Set up destination address in NIC mem. */ 581 bus_space_write_1(nict, nich, ED_P0_RSAR0, buf); 582 bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8); 583 584 /* Set remote DMA write. */ 585 NIC_BARRIER(nict, nich); 586 bus_space_write_1(nict, nich, 587 ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 588 NIC_BARRIER(nict, nich); 589 590 /* 591 * Transfer the mbuf chain to the NIC memory. NE2000 cards 592 * require that data be transferred as words, and only words, 593 * so that case requires some extra code to patch over odd-length 594 * mbufs. 595 */ 596 if (nsc->sc_useword == 0) { 597 /* byte ops are easy. */ 598 for (; m != NULL; m = m->m_next) { 599 if (m->m_len) { 600 bus_space_write_multi_1(asict, asich, 601 NE2000_ASIC_DATA, mtod(m, uint8_t *), 602 m->m_len); 603 } 604 } 605 if (padlen) { 606 for(; padlen > 0; padlen--) 607 bus_space_write_1(asict, asich, 608 NE2000_ASIC_DATA, 0); 609 } 610 } else { 611 /* word ops are a bit trickier. */ 612 uint8_t *data, savebyte[2]; 613 int l, leftover; 614 #ifdef DIAGNOSTIC 615 uint8_t *lim; 616 #endif 617 /* Start out with no leftover data. */ 618 leftover = 0; 619 savebyte[0] = savebyte[1] = 0; 620 621 for (; m != NULL; m = m->m_next) { 622 l = m->m_len; 623 if (l == 0) 624 continue; 625 data = mtod(m, uint8_t *); 626 #ifdef DIAGNOSTIC 627 lim = data + l; 628 #endif 629 while (l > 0) { 630 if (leftover) { 631 /* 632 * Data left over (from mbuf or 633 * realignment). Buffer the next 634 * byte, and write it and the 635 * leftover data out. 636 */ 637 savebyte[1] = *data++; 638 l--; 639 bus_space_write_stream_2(asict, asich, 640 NE2000_ASIC_DATA, 641 *(uint16_t *)savebyte); 642 leftover = 0; 643 } else if (BUS_SPACE_ALIGNED_POINTER(data, 644 uint16_t) == 0) { 645 /* 646 * Unaligned data; buffer the next 647 * byte. 648 */ 649 savebyte[0] = *data++; 650 l--; 651 leftover = 1; 652 } else { 653 /* 654 * Aligned data; output contiguous 655 * words as much as we can, then 656 * buffer the remaining byte, if any. 657 */ 658 leftover = l & 1; 659 l &= ~1; 660 bus_space_write_multi_stream_2(asict, 661 asich, NE2000_ASIC_DATA, 662 (uint16_t *)data, l >> 1); 663 data += l; 664 if (leftover) 665 savebyte[0] = *data++; 666 l = 0; 667 } 668 } 669 if (l < 0) 670 panic("ne2000_write_mbuf: negative len"); 671 #ifdef DIAGNOSTIC 672 if (data != lim) 673 panic("ne2000_write_mbuf: data != lim"); 674 #endif 675 } 676 if (leftover) { 677 savebyte[1] = 0; 678 bus_space_write_stream_2(asict, asich, NE2000_ASIC_DATA, 679 *(uint16_t *)savebyte); 680 } 681 if (padlen) { 682 for(; padlen > 1; padlen -= 2) 683 bus_space_write_stream_2(asict, asich, 684 NE2000_ASIC_DATA, 0); 685 } 686 } 687 NIC_BARRIER(nict, nich); 688 689 /* some AX88796 doesn't seem to have remote DMA complete */ 690 if (sc->sc_flags & DP8390_NO_REMOTE_DMA_COMPLETE) 691 return savelen; 692 693 /* 694 * Wait for remote DMA to complete. This is necessary because on the 695 * transmit side, data is handled internally by the NIC in bursts, and 696 * we can't start another remote DMA until this one completes. Not 697 * waiting causes really bad things to happen - like the NIC wedging 698 * the bus. 699 */ 700 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 701 ED_ISR_RDC) && --maxwait) { 702 (void)bus_space_read_1(nict, nich, ED_P0_CRDA1); 703 (void)bus_space_read_1(nict, nich, ED_P0_CRDA0); 704 NIC_BARRIER(nict, nich); 705 DELAY(1); 706 } 707 708 if (maxwait == 0) { 709 log(LOG_WARNING, 710 "%s: remote transmit DMA failed to complete\n", 711 device_xname(sc->sc_dev)); 712 dp8390_reset(sc); 713 } 714 715 return savelen; 716 } 717 718 /* 719 * Given a source and destination address, copy 'amount' of a packet from 720 * the ring buffer into a linear destination buffer. Takes into account 721 * ring-wrap. 722 */ 723 int 724 ne2000_ring_copy(struct dp8390_softc *sc, int src, void *dstv, u_short amount) 725 { 726 char *dst = dstv; 727 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 728 bus_space_tag_t nict = sc->sc_regt; 729 bus_space_handle_t nich = sc->sc_regh; 730 bus_space_tag_t asict = nsc->sc_asict; 731 bus_space_handle_t asich = nsc->sc_asich; 732 u_short tmp_amount; 733 int useword = nsc->sc_useword; 734 735 /* Does copy wrap to lower addr in ring buffer? */ 736 if (src + amount > sc->mem_end) { 737 tmp_amount = sc->mem_end - src; 738 739 /* Copy amount up to end of NIC memory. */ 740 ne2000_readmem(nict, nich, asict, asich, src, 741 (uint8_t *)dst, tmp_amount, useword); 742 743 amount -= tmp_amount; 744 src = sc->mem_ring; 745 dst += tmp_amount; 746 } 747 748 ne2000_readmem(nict, nich, asict, asich, src, (uint8_t *)dst, 749 amount, useword); 750 751 return src + amount; 752 } 753 754 void 755 ne2000_read_hdr(struct dp8390_softc *sc, int buf, struct dp8390_ring *hdr) 756 { 757 struct ne2000_softc *nsc = (struct ne2000_softc *)sc; 758 759 ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich, 760 buf, (uint8_t *)hdr, sizeof(struct dp8390_ring), 761 nsc->sc_useword); 762 #if BYTE_ORDER == BIG_ENDIAN 763 hdr->count = bswap16(hdr->count); 764 #endif 765 } 766 767 int 768 ne2000_test_mem(struct dp8390_softc *sc) 769 { 770 771 /* Noop. */ 772 return 0; 773 } 774 775 /* 776 * Given a NIC memory source address and a host memory destination address, 777 * copy 'amount' from NIC to host using programmed i/o. The 'amount' is 778 * rounded up to a word - ok as long as mbufs are word sized. 779 */ 780 void 781 ne2000_readmem(bus_space_tag_t nict, bus_space_handle_t nich, 782 bus_space_tag_t asict, bus_space_handle_t asich, 783 int src, uint8_t *dst, size_t amount, int useword) 784 { 785 786 /* Select page 0 registers. */ 787 NIC_BARRIER(nict, nich); 788 bus_space_write_1(nict, nich, ED_P0_CR, 789 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 790 NIC_BARRIER(nict, nich); 791 792 /* Round up to a word. */ 793 amount = roundup2(amount, sizeof(uint16_t)); 794 795 /* Set up DMA byte count. */ 796 bus_space_write_1(nict, nich, ED_P0_RBCR0, amount); 797 bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8); 798 799 /* Set up source address in NIC mem. */ 800 bus_space_write_1(nict, nich, ED_P0_RSAR0, src); 801 bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8); 802 803 NIC_BARRIER(nict, nich); 804 bus_space_write_1(nict, nich, ED_P0_CR, 805 ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA); 806 807 ASIC_BARRIER(asict, asich); 808 if (useword) 809 bus_space_read_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 810 (uint16_t *)dst, amount >> 1); 811 else 812 bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA, 813 dst, amount); 814 } 815 816 /* 817 * Stripped down routine for writing a linear buffer to NIC memory. Only 818 * used in the probe routine to test the memory. 'len' must be even. 819 */ 820 void 821 ne2000_writemem(bus_space_tag_t nict, bus_space_handle_t nich, 822 bus_space_tag_t asict, bus_space_handle_t asich, 823 const uint8_t *src, int dst, size_t len, int useword, int quiet) 824 { 825 int maxwait = 100; /* about 120us */ 826 827 /* Select page 0 registers. */ 828 NIC_BARRIER(nict, nich); 829 bus_space_write_1(nict, nich, ED_P0_CR, 830 ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA); 831 NIC_BARRIER(nict, nich); 832 833 /* Reset remote DMA complete flag. */ 834 bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC); 835 NIC_BARRIER(nict, nich); 836 837 /* Set up DMA byte count. */ 838 bus_space_write_1(nict, nich, ED_P0_RBCR0, len); 839 bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8); 840 841 /* Set up destination address in NIC mem. */ 842 bus_space_write_1(nict, nich, ED_P0_RSAR0, dst); 843 bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8); 844 845 /* Set remote DMA write. */ 846 NIC_BARRIER(nict, nich); 847 bus_space_write_1(nict, nich, ED_P0_CR, 848 ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA); 849 NIC_BARRIER(nict, nich); 850 851 ASIC_BARRIER(asict, asich); 852 if (useword) 853 bus_space_write_multi_stream_2(asict, asich, NE2000_ASIC_DATA, 854 (const uint16_t *)src, len >> 1); 855 else 856 bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA, 857 src, len); 858 ASIC_BARRIER(asict, asich); 859 860 /* 861 * Wait for remote DMA to complete. This is necessary because on the 862 * transmit side, data is handled internally by the NIC in bursts, and 863 * we can't start another remote DMA until this one completes. Not 864 * waiting causes really bad things to happen - like the NIC wedging 865 * the bus. 866 */ 867 while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) != 868 ED_ISR_RDC) && --maxwait) 869 DELAY(1); 870 871 if (!quiet && maxwait == 0) 872 printf("ne2000_writemem: failed to complete\n"); 873 } 874 875 int 876 ne2000_detach(struct ne2000_softc *sc, int flags) 877 { 878 879 return dp8390_detach(&sc->sc_dp8390, flags); 880 } 881 882 bool 883 ne2000_suspend(device_t self, const pmf_qual_t *qual) 884 { 885 struct ne2000_softc *sc = device_private(self); 886 struct dp8390_softc *dsc = &sc->sc_dp8390; 887 int s; 888 889 s = splnet(); 890 891 dp8390_stop(dsc); 892 dp8390_disable(dsc); 893 894 splx(s); 895 return true; 896 } 897 898 bool 899 ne2000_resume(device_t self, const pmf_qual_t *qual) 900 { 901 struct ne2000_softc *sc = device_private(self); 902 struct dp8390_softc *dsc = &sc->sc_dp8390; 903 struct ifnet *ifp = &dsc->sc_ec.ec_if; 904 int s; 905 906 s = splnet(); 907 908 if (ifp->if_flags & IFF_UP) { 909 if (dp8390_enable(dsc) == 0) 910 dp8390_init(dsc); 911 } 912 913 splx(s); 914 return true; 915 } 916
Indexes created Sun Sep 21 20:09:37 GMT 2025