Annotation of sys/dev/ic/ne2000.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ne2000.c,v 1.23 2006/11/07 01:46:59 brad Exp $ */
! 2: /* $NetBSD: ne2000.c,v 1.12 1998/06/10 01:15:50 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*
! 42: * Device driver for National Semiconductor DS8390/WD83C690 based ethernet
! 43: * adapters.
! 44: *
! 45: * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved.
! 46: *
! 47: * Copyright (C) 1993, David Greenman. This software may be used, modified,
! 48: * copied, distributed, and sold, in both source and binary form provided that
! 49: * the above copyright and these terms are retained. Under no circumstances is
! 50: * the author responsible for the proper functioning of this software, nor does
! 51: * the author assume any responsibility for damages incurred with its use.
! 52: */
! 53:
! 54: /*
! 55: * Common code shared by all NE2000-compatible Ethernet interfaces.
! 56: */
! 57:
! 58: #include <sys/param.h>
! 59: #include <sys/systm.h>
! 60: #include <sys/device.h>
! 61: #include <sys/socket.h>
! 62: #include <sys/mbuf.h>
! 63: #include <sys/syslog.h>
! 64:
! 65: #include <net/if.h>
! 66: #include <net/if_dl.h>
! 67: #include <net/if_types.h>
! 68: #include <net/if_media.h>
! 69:
! 70: #include <netinet/in.h>
! 71: #include <netinet/if_ether.h>
! 72:
! 73: #include <machine/bus.h>
! 74:
! 75: #include <dev/ic/dp8390reg.h>
! 76: #include <dev/ic/dp8390var.h>
! 77:
! 78: #include <dev/ic/ne2000reg.h>
! 79: #include <dev/ic/ne2000var.h>
! 80:
! 81: #include <dev/ic/ax88190reg.h>
! 82:
! 83: int ne2000_write_mbuf(struct dp8390_softc *, struct mbuf *, int);
! 84: int ne2000_ring_copy(struct dp8390_softc *, int, caddr_t, u_short);
! 85: void ne2000_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *);
! 86: int ne2000_test_mem(struct dp8390_softc *);
! 87:
! 88: void ne2000_writemem(bus_space_tag_t, bus_space_handle_t,
! 89: bus_space_tag_t, bus_space_handle_t, u_int8_t *, int, size_t, int);
! 90: void ne2000_readmem(bus_space_tag_t, bus_space_handle_t,
! 91: bus_space_tag_t, bus_space_handle_t, int, u_int8_t *, size_t, int);
! 92:
! 93: #define ASIC_BARRIER(asict, asich) \
! 94: bus_space_barrier((asict), (asich), 0, 0x10, \
! 95: BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE)
! 96:
! 97: struct cfdriver ne_cd = {
! 98: NULL, "ne", DV_IFNET
! 99: };
! 100:
! 101: int
! 102: ne2000_attach(struct ne2000_softc *nsc, u_int8_t *myea)
! 103: {
! 104: struct dp8390_softc *dsc = &nsc->sc_dp8390;
! 105: bus_space_tag_t nict = dsc->sc_regt;
! 106: bus_space_handle_t nich = dsc->sc_regh;
! 107: bus_space_tag_t asict = nsc->sc_asict;
! 108: bus_space_handle_t asich = nsc->sc_asich;
! 109: u_int8_t romdata[16];
! 110: int memsize, i, useword;
! 111:
! 112: /*
! 113: * Detect it again unless caller specified it; this gives us
! 114: * the memory size.
! 115: */
! 116: if (nsc->sc_type == NE2000_TYPE_UNKNOWN)
! 117: nsc->sc_type = ne2000_detect(nsc);
! 118:
! 119: /*
! 120: * 8k of memory for NE1000, 16k otherwise.
! 121: */
! 122: switch (nsc->sc_type) {
! 123: case NE2000_TYPE_UNKNOWN:
! 124: default:
! 125: printf(": where did the card go?\n");
! 126: return (1);
! 127: case NE2000_TYPE_NE1000:
! 128: memsize = 8192;
! 129: useword = 0;
! 130: break;
! 131: case NE2000_TYPE_NE2000:
! 132: case NE2000_TYPE_AX88190: /* XXX really? */
! 133: case NE2000_TYPE_AX88790:
! 134: case NE2000_TYPE_DL10019:
! 135: case NE2000_TYPE_DL10022:
! 136: memsize = 8192 * 2;
! 137: useword = 1;
! 138: break;
! 139: }
! 140:
! 141: nsc->sc_useword = useword;
! 142:
! 143: dsc->cr_proto = ED_CR_RD2;
! 144: if (nsc->sc_type == NE2000_TYPE_AX88190 ||
! 145: nsc->sc_type == NE2000_TYPE_AX88790) {
! 146: dsc->rcr_proto = ED_RCR_INTT;
! 147: dsc->sc_flags |= DP8390_DO_AX88190_WORKAROUND;
! 148: } else
! 149: dsc->rcr_proto = 0;
! 150:
! 151: /*
! 152: * DCR gets:
! 153: *
! 154: * FIFO threshold to 8, No auto-init Remote DMA,
! 155: * byte order=80x86.
! 156: *
! 157: * NE1000 gets byte-wide DMA, NE2000 gets word-wide DMA.
! 158: */
! 159: dsc->dcr_reg = ED_DCR_FT1 | ED_DCR_LS | (useword ? ED_DCR_WTS : 0);
! 160:
! 161: dsc->test_mem = ne2000_test_mem;
! 162: dsc->ring_copy = ne2000_ring_copy;
! 163: dsc->write_mbuf = ne2000_write_mbuf;
! 164: dsc->read_hdr = ne2000_read_hdr;
! 165:
! 166: /* Registers are linear. */
! 167: for (i = 0; i < 16; i++)
! 168: dsc->sc_reg_map[i] = i;
! 169:
! 170: /*
! 171: * NIC memory doens't start at zero on an NE board.
! 172: * The start address is tied to the bus width.
! 173: * (It happens to be computed the same way as mem size.)
! 174: */
! 175: dsc->mem_start = memsize;
! 176:
! 177: #ifdef GWETHER
! 178: {
! 179: int x, mstart = 0;
! 180: int8_t pbuf0[ED_PAGE_SIZE], pbuf[ED_PAGE_SIZE],
! 181: tbuf[ED_PAGE_SIZE];
! 182:
! 183: for (i = 0; i < ED_PAGE_SIZE; i++)
! 184: pbuf0[i] = 0;
! 185:
! 186: /* Search for the start of RAM. */
! 187: for (x = 1; x < 256; x++) {
! 188: ne2000_writemem(nict, nich, asict, asich, pbuf0,
! 189: x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword);
! 190: ne2000_readmem(nict, nich, asict, asich,
! 191: x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
! 192: if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
! 193: for (i = 0; i < ED_PAGE_SIZE; i++)
! 194: pbuf[i] = 255 - x;
! 195: ne2000_writemem(nict, nich, asict, asich,
! 196: pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
! 197: useword);
! 198: ne2000_readmem(nict, nich, asict, asich,
! 199: x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE,
! 200: useword);
! 201: if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0) {
! 202: mstart = x << ED_PAGE_SHIFT;
! 203: memsize = ED_PAGE_SIZE;
! 204: break;
! 205: }
! 206: }
! 207: }
! 208:
! 209: if (mstart == 0) {
! 210: printf(": cannot find start of RAM\n");
! 211: return;
! 212: }
! 213:
! 214: /* Search for the end of RAM. */
! 215: for (++x; x < 256; x++) {
! 216: ne2000_writemem(nict, nich, asict, asich, pbuf0,
! 217: x << ED_PAGE_SHIFT, ED_PAGE_SIZE, useword);
! 218: ne2000_readmem(nict, nich, asict, asich,
! 219: x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE, useword);
! 220: if (bcmp(pbuf0, tbuf, ED_PAGE_SIZE) == 0) {
! 221: for (i = 0; i < ED_PAGE_SIZE; i++)
! 222: pbuf[i] = 255 - x;
! 223: ne2000_writemem(nict, nich, asict, asich,
! 224: pbuf, x << ED_PAGE_SHIFT, ED_PAGE_SIZE,
! 225: useword);
! 226: ne2000_readmem(nict, nich, asict, asich,
! 227: x << ED_PAGE_SHIFT, tbuf, ED_PAGE_SIZE,
! 228: useword);
! 229: if (bcmp(pbuf, tbuf, ED_PAGE_SIZE) == 0)
! 230: memsize += ED_PAGE_SIZE;
! 231: else
! 232: break;
! 233: } else
! 234: break;
! 235: }
! 236:
! 237: printf(": RAM start 0x%x, size %d\n",
! 238: mstart, memsize);
! 239:
! 240: dsc->mem_start = mstart;
! 241: }
! 242: #endif /* GWETHER */
! 243:
! 244: dsc->mem_size = memsize;
! 245:
! 246: if (myea == NULL) {
! 247: /* Read the station address. */
! 248: if (nsc->sc_type == NE2000_TYPE_AX88190 ||
! 249: nsc->sc_type == NE2000_TYPE_AX88790) {
! 250: /* Select page 0 registers. */
! 251: NIC_BARRIER(nict, nich);
! 252: bus_space_write_1(nict, nich, ED_P0_CR,
! 253: ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
! 254: NIC_BARRIER(nict, nich);
! 255: /* Select word transfer. */
! 256: bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_WTS);
! 257: NIC_BARRIER(nict, nich);
! 258: ne2000_readmem(nict, nich, asict, asich,
! 259: AX88190_NODEID_OFFSET, dsc->sc_arpcom.ac_enaddr,
! 260: ETHER_ADDR_LEN, useword);
! 261: } else {
! 262: ne2000_readmem(nict, nich, asict, asich, 0, romdata,
! 263: sizeof(romdata), useword);
! 264: for (i = 0; i < ETHER_ADDR_LEN; i++)
! 265: dsc->sc_arpcom.ac_enaddr[i] =
! 266: romdata[i * (useword ? 2 : 1)];
! 267: }
! 268: } else
! 269: bcopy(myea, dsc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN);
! 270:
! 271: /* Clear any pending interrupts that might have occurred above. */
! 272: NIC_BARRIER(nict, nich);
! 273: bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
! 274: NIC_BARRIER(nict, nich);
! 275:
! 276: if (dsc->sc_media_init == NULL)
! 277: dsc->sc_media_init = dp8390_media_init;
! 278:
! 279: if (dp8390_config(dsc)) {
! 280: printf(": setup failed\n");
! 281: return (1);
! 282: }
! 283:
! 284: /*
! 285: * We need to compute mem_ring a bit differently; override the
! 286: * value set up in dp8390_config().
! 287: */
! 288: dsc->mem_ring =
! 289: dsc->mem_start + ((dsc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT);
! 290:
! 291: return (0);
! 292: }
! 293:
! 294: /*
! 295: * Detect an NE-2000 or compatible. Returns a model code.
! 296: */
! 297: int
! 298: ne2000_detect(struct ne2000_softc *nsc)
! 299: {
! 300: struct dp8390_softc *dsc = &nsc->sc_dp8390;
! 301: bus_space_tag_t nict = dsc->sc_regt;
! 302: bus_space_handle_t nich = dsc->sc_regh;
! 303: bus_space_tag_t asict = nsc->sc_asict;
! 304: bus_space_handle_t asich = nsc->sc_asich;
! 305: static u_int8_t test_pattern[32] = "THIS is A memory TEST pattern";
! 306: u_int8_t test_buffer[32], tmp;
! 307: int state, i, rv = 0;
! 308:
! 309: state = dsc->sc_enabled;
! 310: dsc->sc_enabled = 0;
! 311:
! 312: /* Reset the board. */
! 313: #ifdef GWETHER
! 314: bus_space_write_1(asict, asich, NE2000_ASIC_RESET, 0);
! 315: ASIC_BARRIER(asict, asich);
! 316: delay(200);
! 317: #endif /* GWETHER */
! 318: tmp = bus_space_read_1(asict, asich, NE2000_ASIC_RESET);
! 319: ASIC_BARRIER(asict, asich);
! 320: delay(10000);
! 321:
! 322: /*
! 323: * I don't know if this is necessary; probably cruft leftover from
! 324: * Clarkson packet driver code. Doesn't do a thing on the boards I've
! 325: * tested. -DG [note that a outb(0x84, 0) seems to work here, and is
! 326: * non-invasive...but some boards don't seem to reset and I don't have
! 327: * complete documentation on what the 'right' thing to do is...so we do
! 328: * the invasive thing for now. Yuck.]
! 329: */
! 330: bus_space_write_1(asict, asich, NE2000_ASIC_RESET, tmp);
! 331: ASIC_BARRIER(asict, asich);
! 332: delay(5000);
! 333:
! 334: /*
! 335: * This is needed because some NE clones apparently don't reset the
! 336: * NIC properly (or the NIC chip doesn't reset fully on power-up).
! 337: * XXX - this makes the probe invasive! Done against my better
! 338: * judgement. -DLG
! 339: */
! 340: bus_space_write_1(nict, nich, ED_P0_CR,
! 341: ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STP);
! 342: NIC_BARRIER(nict, nich);
! 343:
! 344: delay(5000);
! 345:
! 346: /*
! 347: * Generic probe routine for testing for the existence of a DS8390.
! 348: * Must be performed after the NIC has just been reset. This
! 349: * works by looking at certain register values that are guaranteed
! 350: * to be initialized a certain way after power-up or reset.
! 351: *
! 352: * Specifically:
! 353: *
! 354: * Register reset bits set bits
! 355: * -------- ---------- --------
! 356: * CR TXP, STA RD2, STP
! 357: * ISR RST
! 358: * IMR <all>
! 359: * DCR LAS
! 360: * TCR LB1, LB0
! 361: *
! 362: * We only look at CR and ISR, however, since looking at the others
! 363: * would require changing register pages, which would be intrusive
! 364: * if this isn't an 8390.
! 365: */
! 366:
! 367: tmp = bus_space_read_1(nict, nich, ED_P0_CR);
! 368: if ((tmp & (ED_CR_RD2 | ED_CR_TXP | ED_CR_STA | ED_CR_STP)) !=
! 369: (ED_CR_RD2 | ED_CR_STP))
! 370: goto out;
! 371:
! 372: tmp = bus_space_read_1(nict, nich, ED_P0_ISR);
! 373: if ((tmp & ED_ISR_RST) != ED_ISR_RST)
! 374: goto out;
! 375:
! 376: bus_space_write_1(nict, nich,
! 377: ED_P0_CR, ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
! 378: NIC_BARRIER(nict, nich);
! 379:
! 380: for (i = 0; i < 100; i++) {
! 381: if ((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RST) ==
! 382: ED_ISR_RST) {
! 383: /* Ack the reset bit. */
! 384: bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RST);
! 385: NIC_BARRIER(nict, nich);
! 386: break;
! 387: }
! 388: delay(100);
! 389: }
! 390:
! 391: #if 0
! 392: /* XXX */
! 393: if (i == 100)
! 394: goto out;
! 395: #endif
! 396:
! 397: /*
! 398: * Test the ability to read and write to the NIC memory. This has
! 399: * the side effect of determining if this is an NE1000 or an NE2000.
! 400: */
! 401:
! 402: /*
! 403: * This prevents packets from being stored in the NIC memory when
! 404: * the readmem routine turns on the start bit in the CR.
! 405: */
! 406: bus_space_write_1(nict, nich, ED_P0_RCR, ED_RCR_MON);
! 407: NIC_BARRIER(nict, nich);
! 408:
! 409: /* Temporarily initialize DCR for byte operations. */
! 410: bus_space_write_1(nict, nich, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS);
! 411:
! 412: bus_space_write_1(nict, nich, ED_P0_PSTART, 8192 >> ED_PAGE_SHIFT);
! 413: bus_space_write_1(nict, nich, ED_P0_PSTOP, 16384 >> ED_PAGE_SHIFT);
! 414:
! 415: /*
! 416: * Write a test pattern in byte mode. If this fails, then there
! 417: * probably isn't any memory at 8k - which likely means that the
! 418: * board is an NE2000.
! 419: */
! 420: ne2000_writemem(nict, nich, asict, asich, test_pattern, 8192,
! 421: sizeof(test_pattern), 0);
! 422: ne2000_readmem(nict, nich, asict, asich, 8192, test_buffer,
! 423: sizeof(test_buffer), 0);
! 424:
! 425: if (bcmp(test_pattern, test_buffer, sizeof(test_pattern))) {
! 426: /* not an NE1000 - try NE2000 */
! 427: bus_space_write_1(nict, nich, ED_P0_DCR,
! 428: ED_DCR_WTS | ED_DCR_FT1 | ED_DCR_LS);
! 429: bus_space_write_1(nict, nich, ED_P0_PSTART,
! 430: 16384 >> ED_PAGE_SHIFT);
! 431: bus_space_write_1(nict, nich, ED_P0_PSTOP,
! 432: 32768 >> ED_PAGE_SHIFT);
! 433:
! 434: /*
! 435: * Write the test pattern in word mode. If this also fails,
! 436: * then we don't know what this board is.
! 437: */
! 438: ne2000_writemem(nict, nich, asict, asich, test_pattern, 16384,
! 439: sizeof(test_pattern), 1);
! 440: ne2000_readmem(nict, nich, asict, asich, 16384, test_buffer,
! 441: sizeof(test_buffer), 1);
! 442:
! 443: if (bcmp(test_pattern, test_buffer, sizeof(test_pattern)))
! 444: goto out; /* not an NE2000 either */
! 445:
! 446: rv = NE2000_TYPE_NE2000;
! 447: } else {
! 448: /* We're an NE1000. */
! 449: rv = NE2000_TYPE_NE1000;
! 450: }
! 451:
! 452: /* Clear any pending interrupts that might have occurred above. */
! 453: NIC_BARRIER(nict, nich);
! 454: bus_space_write_1(nict, nich, ED_P0_ISR, 0xff);
! 455:
! 456: out:
! 457: dsc->sc_enabled = state;
! 458:
! 459: return (rv);
! 460: }
! 461:
! 462: /*
! 463: * Write an mbuf chain to the destination NIC memory address using programmed
! 464: * I/O.
! 465: */
! 466: int
! 467: ne2000_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf)
! 468: {
! 469: struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
! 470: bus_space_tag_t nict = sc->sc_regt;
! 471: bus_space_handle_t nich = sc->sc_regh;
! 472: bus_space_tag_t asict = nsc->sc_asict;
! 473: bus_space_handle_t asich = nsc->sc_asich;
! 474: int savelen;
! 475: int maxwait = 100; /* about 120us */
! 476:
! 477: savelen = m->m_pkthdr.len;
! 478:
! 479: /* Select page 0 registers. */
! 480: NIC_BARRIER(nict, nich);
! 481: bus_space_write_1(nict, nich, ED_P0_CR,
! 482: ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
! 483: NIC_BARRIER(nict, nich);
! 484:
! 485: /* Reset remote DMA complete flag. */
! 486: bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
! 487: NIC_BARRIER(nict, nich);
! 488:
! 489: /* Set up DMA byte count. */
! 490: bus_space_write_1(nict, nich, ED_P0_RBCR0, savelen);
! 491: bus_space_write_1(nict, nich, ED_P0_RBCR1, savelen >> 8);
! 492:
! 493: /* Set up destination address in NIC mem. */
! 494: bus_space_write_1(nict, nich, ED_P0_RSAR0, buf);
! 495: bus_space_write_1(nict, nich, ED_P0_RSAR1, buf >> 8);
! 496:
! 497: /* Set remote DMA write. */
! 498: NIC_BARRIER(nict, nich);
! 499: bus_space_write_1(nict, nich,
! 500: ED_P0_CR, ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
! 501: NIC_BARRIER(nict, nich);
! 502:
! 503: /*
! 504: * Transfer the mbuf chain to the NIC memory. NE2000 cards
! 505: * require that data be transferred as words, and only words,
! 506: * so that case requires some extra code to patch over odd-length
! 507: * mbufs.
! 508: */
! 509: if (nsc->sc_type == NE2000_TYPE_NE1000) {
! 510: /* NE1000s are easy. */
! 511: for (; m != 0; m = m->m_next) {
! 512: if (m->m_len) {
! 513: bus_space_write_multi_1(asict, asich,
! 514: NE2000_ASIC_DATA, mtod(m, u_int8_t *),
! 515: m->m_len);
! 516: }
! 517: }
! 518: } else {
! 519: /* NE2000s are a bit trickier. */
! 520: u_int8_t *data, savebyte[2];
! 521: int l, leftover;
! 522: #ifdef DIAGNOSTIC
! 523: u_int8_t *lim;
! 524: #endif
! 525: /* Start out with no leftover data. */
! 526: leftover = 0;
! 527: savebyte[0] = savebyte[1] = 0;
! 528:
! 529: for (; m != 0; m = m->m_next) {
! 530: l = m->m_len;
! 531: if (l == 0)
! 532: continue;
! 533: data = mtod(m, u_int8_t *);
! 534: #ifdef DIAGNOSTIC
! 535: lim = data + l;
! 536: #endif
! 537: while (l > 0) {
! 538: if (leftover) {
! 539: /*
! 540: * Data left over (from mbuf or
! 541: * realignment). Buffer the next
! 542: * byte, and write it and the
! 543: * leftover data out.
! 544: */
! 545: savebyte[1] = *data++;
! 546: l--;
! 547: bus_space_write_raw_multi_2(asict,
! 548: asich, NE2000_ASIC_DATA,
! 549: savebyte, 2);
! 550: leftover = 0;
! 551: } else if (ALIGNED_POINTER(data,
! 552: u_int16_t) == 0) {
! 553: /*
! 554: * Unaligned data; buffer the next
! 555: * byte.
! 556: */
! 557: savebyte[0] = *data++;
! 558: l--;
! 559: leftover = 1;
! 560: } else {
! 561: /*
! 562: * Aligned data; output contiguous
! 563: * words as much as we can, then
! 564: * buffer the remaining byte, if any.
! 565: */
! 566: leftover = l & 1;
! 567: l &= ~1;
! 568: bus_space_write_raw_multi_2(asict,
! 569: asich, NE2000_ASIC_DATA, data, l);
! 570: data += l;
! 571: if (leftover)
! 572: savebyte[0] = *data++;
! 573: l = 0;
! 574: }
! 575: }
! 576: if (l < 0)
! 577: panic("ne2000_write_mbuf: negative len");
! 578: #ifdef DIAGNOSTIC
! 579: if (data != lim)
! 580: panic("ne2000_write_mbuf: data != lim");
! 581: #endif
! 582: }
! 583: if (leftover) {
! 584: savebyte[1] = 0;
! 585: bus_space_write_raw_multi_2(asict, asich,
! 586: NE2000_ASIC_DATA, savebyte, 2);
! 587: }
! 588: }
! 589: NIC_BARRIER(nict, nich);
! 590:
! 591: /* AX88796 doesn't seem to have remote DMA complete */
! 592: if (sc->sc_flags & DP8390_NO_REMOTE_DMA_COMPLETE)
! 593: return (savelen);
! 594:
! 595: /*
! 596: * Wait for remote DMA to complete. This is necessary because on the
! 597: * transmit side, data is handled internally by the NIC in bursts, and
! 598: * we can't start another remote DMA until this one completes. Not
! 599: * waiting causes really bad things to happen - like the NIC wedging
! 600: * the bus.
! 601: */
! 602: while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
! 603: ED_ISR_RDC) && --maxwait) {
! 604: bus_space_read_1(nict, nich, ED_P0_CRDA1);
! 605: bus_space_read_1(nict, nich, ED_P0_CRDA0);
! 606: NIC_BARRIER(nict, nich);
! 607: DELAY(1);
! 608: }
! 609:
! 610: if (maxwait == 0) {
! 611: log(LOG_WARNING,
! 612: "%s: remote transmit DMA failed to complete\n",
! 613: sc->sc_dev.dv_xname);
! 614: dp8390_reset(sc);
! 615: }
! 616:
! 617: return (savelen);
! 618: }
! 619:
! 620: /*
! 621: * Given a source and destination address, copy 'amount' of a packet from
! 622: * the ring buffer into a linear destination buffer. Takes into account
! 623: * ring-wrap.
! 624: */
! 625: int
! 626: ne2000_ring_copy(struct dp8390_softc *sc, int src, caddr_t dst,
! 627: u_short amount)
! 628: {
! 629: struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
! 630: bus_space_tag_t nict = sc->sc_regt;
! 631: bus_space_handle_t nich = sc->sc_regh;
! 632: bus_space_tag_t asict = nsc->sc_asict;
! 633: bus_space_handle_t asich = nsc->sc_asich;
! 634: u_short tmp_amount;
! 635: int useword = nsc->sc_useword;
! 636:
! 637: /* Does copy wrap to lower addr in ring buffer? */
! 638: if (src + amount > sc->mem_end) {
! 639: tmp_amount = sc->mem_end - src;
! 640:
! 641: /* Copy amount up to end of NIC memory. */
! 642: ne2000_readmem(nict, nich, asict, asich, src,
! 643: (u_int8_t *)dst, tmp_amount, useword);
! 644:
! 645: amount -= tmp_amount;
! 646: src = sc->mem_ring;
! 647: dst += tmp_amount;
! 648: }
! 649:
! 650: ne2000_readmem(nict, nich, asict, asich, src, (u_int8_t *)dst,
! 651: amount, useword);
! 652:
! 653: return (src + amount);
! 654: }
! 655:
! 656: void
! 657: ne2000_read_hdr(struct dp8390_softc *sc, int buf, struct dp8390_ring *hdr)
! 658: {
! 659: struct ne2000_softc *nsc = (struct ne2000_softc *)sc;
! 660:
! 661: ne2000_readmem(sc->sc_regt, sc->sc_regh, nsc->sc_asict, nsc->sc_asich,
! 662: buf, (u_int8_t *)hdr, sizeof(struct dp8390_ring),
! 663: nsc->sc_useword);
! 664: #if BYTE_ORDER == BIG_ENDIAN
! 665: hdr->count = swap16(hdr->count);
! 666: #endif
! 667: }
! 668:
! 669: int
! 670: ne2000_test_mem(struct dp8390_softc *sc)
! 671: {
! 672: /* Noop. */
! 673: return (0);
! 674: }
! 675:
! 676: /*
! 677: * Given a NIC memory source address and a host memory destination address,
! 678: * copy 'amount' from NIC to host using programmed i/o. The 'amount' is
! 679: * rounded up to a word - ok as long as mbufs are word sized.
! 680: */
! 681: void
! 682: ne2000_readmem(bus_space_tag_t nict, bus_space_handle_t nich,
! 683: bus_space_tag_t asict, bus_space_handle_t asich, int src,
! 684: u_int8_t *dst, size_t amount, int useword)
! 685: {
! 686:
! 687: /* Select page 0 registers. */
! 688: NIC_BARRIER(nict, nich);
! 689: bus_space_write_1(nict, nich, ED_P0_CR,
! 690: ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
! 691: NIC_BARRIER(nict, nich);
! 692:
! 693: /* Round up to a word. */
! 694: if (amount & 1)
! 695: ++amount;
! 696:
! 697: /* Set up DMA byte count. */
! 698: bus_space_write_1(nict, nich, ED_P0_RBCR0, amount);
! 699: bus_space_write_1(nict, nich, ED_P0_RBCR1, amount >> 8);
! 700:
! 701: /* Set up source address in NIC mem. */
! 702: bus_space_write_1(nict, nich, ED_P0_RSAR0, src);
! 703: bus_space_write_1(nict, nich, ED_P0_RSAR1, src >> 8);
! 704:
! 705: NIC_BARRIER(nict, nich);
! 706: bus_space_write_1(nict, nich, ED_P0_CR,
! 707: ED_CR_RD0 | ED_CR_PAGE_0 | ED_CR_STA);
! 708:
! 709: ASIC_BARRIER(asict, asich);
! 710: if (useword)
! 711: bus_space_read_raw_multi_2(asict, asich, NE2000_ASIC_DATA,
! 712: dst, amount);
! 713: else
! 714: bus_space_read_multi_1(asict, asich, NE2000_ASIC_DATA,
! 715: dst, amount);
! 716: }
! 717:
! 718: /*
! 719: * Stripped down routine for writing a linear buffer to NIC memory. Only
! 720: * used in the probe routine to test the memory. 'len' must be even.
! 721: */
! 722: void
! 723: ne2000_writemem(bus_space_tag_t nict, bus_space_handle_t nich,
! 724: bus_space_tag_t asict, bus_space_handle_t asich, u_int8_t *src,
! 725: int dst, size_t len, int useword)
! 726: {
! 727: int maxwait = 100; /* about 120us */
! 728:
! 729: /* Select page 0 registers. */
! 730: NIC_BARRIER(nict, nich);
! 731: bus_space_write_1(nict, nich, ED_P0_CR,
! 732: ED_CR_RD2 | ED_CR_PAGE_0 | ED_CR_STA);
! 733: NIC_BARRIER(nict, nich);
! 734:
! 735: /* Reset remote DMA complete flag. */
! 736: bus_space_write_1(nict, nich, ED_P0_ISR, ED_ISR_RDC);
! 737: NIC_BARRIER(nict, nich);
! 738:
! 739: /* Set up DMA byte count. */
! 740: bus_space_write_1(nict, nich, ED_P0_RBCR0, len);
! 741: bus_space_write_1(nict, nich, ED_P0_RBCR1, len >> 8);
! 742:
! 743: /* Set up destination address in NIC mem. */
! 744: bus_space_write_1(nict, nich, ED_P0_RSAR0, dst);
! 745: bus_space_write_1(nict, nich, ED_P0_RSAR1, dst >> 8);
! 746:
! 747: /* Set remote DMA write. */
! 748: NIC_BARRIER(nict, nich);
! 749: bus_space_write_1(nict, nich, ED_P0_CR,
! 750: ED_CR_RD1 | ED_CR_PAGE_0 | ED_CR_STA);
! 751: NIC_BARRIER(nict, nich);
! 752:
! 753: ASIC_BARRIER(asict, asich);
! 754: if (useword)
! 755: bus_space_write_raw_multi_2(asict, asich, NE2000_ASIC_DATA,
! 756: src, len);
! 757: else
! 758: bus_space_write_multi_1(asict, asich, NE2000_ASIC_DATA,
! 759: src, len);
! 760: ASIC_BARRIER(asict, asich);
! 761:
! 762: /*
! 763: * Wait for remote DMA to complete. This is necessary because on the
! 764: * transmit side, data is handled internally by the NIC in bursts, and
! 765: * we can't start another remote DMA until this one completes. Not
! 766: * waiting causes really bad things to happen - like the NIC wedging
! 767: * the bus.
! 768: */
! 769: while (((bus_space_read_1(nict, nich, ED_P0_ISR) & ED_ISR_RDC) !=
! 770: ED_ISR_RDC) && --maxwait)
! 771: DELAY(1);
! 772: }
! 773:
! 774: int
! 775: ne2000_detach(struct ne2000_softc *sc, int flags)
! 776: {
! 777: return (dp8390_detach(&sc->sc_dp8390, flags));
! 778: }
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