Annotation of sys/dev/isa/if_le_isa.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: if_le_isa.c,v 1.19 2007/06/17 21:20:47 jasper Exp $ */
! 2: /* $NetBSD: if_le_isa.c,v 1.2 1996/05/12 23:52:56 mycroft Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1995 Charles M. Hannum. All rights reserved.
! 6: * Copyright (c) 1992, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This code is derived from software contributed to Berkeley by
! 10: * Ralph Campbell and Rick Macklem.
! 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. Neither the name of the University nor the names of its contributors
! 21: * may be used to endorse or promote products derived from this software
! 22: * without specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 34: * SUCH DAMAGE.
! 35: *
! 36: * @(#)if_le.c 8.2 (Berkeley) 11/16/93
! 37: */
! 38:
! 39: #include "bpfilter.h"
! 40: #include "isadma.h"
! 41:
! 42: #include <sys/param.h>
! 43: #include <sys/systm.h>
! 44: #include <sys/mbuf.h>
! 45: #include <sys/syslog.h>
! 46: #include <sys/socket.h>
! 47: #include <sys/device.h>
! 48:
! 49: #include <net/if.h>
! 50: #include <net/if_media.h>
! 51:
! 52: #ifdef INET
! 53: #include <netinet/in.h>
! 54: #include <netinet/if_ether.h>
! 55: #endif
! 56:
! 57: #include <machine/cpu.h>
! 58: #include <machine/intr.h>
! 59:
! 60: #include <dev/isa/isareg.h>
! 61: #include <dev/isa/isavar.h>
! 62: #include <dev/isa/isadmavar.h>
! 63:
! 64: #include <dev/ic/am7990reg.h>
! 65: #include <dev/ic/am7990var.h>
! 66:
! 67: #include <dev/isa/if_levar.h>
! 68:
! 69: static char *card_type[] =
! 70: { "unknown", "BICC Isolan", "NE2100", "DEPCA", "PCnet-ISA" };
! 71:
! 72: int le_isa_probe(struct device *, void *, void *);
! 73: void le_isa_attach(struct device *, struct device *, void *);
! 74:
! 75: struct cfattach le_isa_ca = {
! 76: sizeof(struct le_softc), le_isa_probe, le_isa_attach
! 77: };
! 78:
! 79: int depca_isa_probe(struct le_softc *, struct isa_attach_args *);
! 80: int ne2100_isa_probe(struct le_softc *, struct isa_attach_args *);
! 81: int bicc_isa_probe(struct le_softc *, struct isa_attach_args *);
! 82: int lance_isa_probe(struct am7990_softc *);
! 83:
! 84: int
! 85: le_isa_probe(struct device *parent, void *match, void *aux)
! 86: {
! 87: struct le_softc *lesc = match;
! 88: struct isa_attach_args *ia = aux;
! 89: u_int8_t bogusether[ETHER_ADDR_LEN] = { 255, 255, 255, 255, 255, 255 };
! 90:
! 91: #if NISADMA == 0
! 92: if (ia->ia_drq != DRQUNK) {
! 93: printf("cannot support dma lance devices\n");
! 94: return 0;
! 95: }
! 96: #endif
! 97:
! 98: if (bicc_isa_probe(lesc, ia) == 0 && ne2100_isa_probe(lesc, ia) == 0 &&
! 99: depca_isa_probe(lesc, ia) == 0)
! 100: return (0);
! 101:
! 102: if (bcmp(lesc->sc_am7990.sc_arpcom.ac_enaddr, bogusether,
! 103: sizeof(bogusether)) == 0)
! 104: return (0);
! 105:
! 106: return (1);
! 107: }
! 108:
! 109: int
! 110: depca_isa_probe(struct le_softc *lesc, struct isa_attach_args *ia)
! 111: {
! 112: struct am7990_softc *sc = &lesc->sc_am7990;
! 113: bus_space_tag_t iot = lesc->sc_iot;
! 114: bus_space_handle_t ioh = lesc->sc_ioh;
! 115: int iosize = 16;
! 116: int port;
! 117:
! 118: #if 0
! 119: u_long sum, rom_sum;
! 120: u_char x;
! 121: #endif
! 122: int i;
! 123:
! 124: if (bus_space_map(iot, ia->ia_iobase, iosize, 0, &ioh))
! 125: return (0);
! 126: lesc->sc_iot = iot;
! 127: lesc->sc_ioh = ioh;
! 128: lesc->sc_rap = DEPCA_RAP;
! 129: lesc->sc_rdp = DEPCA_RDP;
! 130: lesc->sc_card = DEPCA;
! 131:
! 132: if (lance_isa_probe(sc) == 0) {
! 133: bus_space_unmap(iot, ioh, iosize);
! 134: return 0;
! 135: }
! 136:
! 137: bus_space_write_1(iot, ioh, DEPCA_CSR, DEPCA_CSR_DUM);
! 138:
! 139: /*
! 140: * Extract the physical MAC address from the ROM.
! 141: *
! 142: * The address PROM is 32 bytes wide, and we access it through
! 143: * a single I/O port. On each read, it rotates to the next
! 144: * position. We find the ethernet address by looking for a
! 145: * particular sequence of bytes (0xff, 0x00, 0x55, 0xaa, 0xff,
! 146: * 0x00, 0x55, 0xaa), and then reading the next 8 bytes (the
! 147: * ethernet address and a checksum).
! 148: *
! 149: * It appears that the PROM can be at one of two locations, so
! 150: * we just try both.
! 151: */
! 152: port = DEPCA_ADP;
! 153: for (i = 0; i < 32; i++)
! 154: if (bus_space_read_1(iot, ioh, port) == 0xff &&
! 155: bus_space_read_1(iot, ioh, port) == 0x00 &&
! 156: bus_space_read_1(iot, ioh, port) == 0x55 &&
! 157: bus_space_read_1(iot, ioh, port) == 0xaa &&
! 158: bus_space_read_1(iot, ioh, port) == 0xff &&
! 159: bus_space_read_1(iot, ioh, port) == 0x00 &&
! 160: bus_space_read_1(iot, ioh, port) == 0x55 &&
! 161: bus_space_read_1(iot, ioh, port) == 0xaa)
! 162: goto found;
! 163: port = DEPCA_ADP + 1;
! 164: for (i = 0; i < 32; i++)
! 165: if (bus_space_read_1(iot, ioh, port) == 0xff &&
! 166: bus_space_read_1(iot, ioh, port) == 0x00 &&
! 167: bus_space_read_1(iot, ioh, port) == 0x55 &&
! 168: bus_space_read_1(iot, ioh, port) == 0xaa &&
! 169: bus_space_read_1(iot, ioh, port) == 0xff &&
! 170: bus_space_read_1(iot, ioh, port) == 0x00 &&
! 171: bus_space_read_1(iot, ioh, port) == 0x55 &&
! 172: bus_space_read_1(iot, ioh, port) == 0xaa)
! 173: goto found;
! 174: printf("%s: address not found\n", sc->sc_dev.dv_xname);
! 175: return 0;
! 176:
! 177: found:
! 178: for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++)
! 179: sc->sc_arpcom.ac_enaddr[i] = bus_space_read_1(iot, ioh, port);
! 180:
! 181: #if 0
! 182: sum =
! 183: (sc->sc_arpcom.ac_enaddr[0] << 2) +
! 184: (sc->sc_arpcom.ac_enaddr[1] << 10) +
! 185: (sc->sc_arpcom.ac_enaddr[2] << 1) +
! 186: (sc->sc_arpcom.ac_enaddr[3] << 9) +
! 187: (sc->sc_arpcom.ac_enaddr[4] << 0) +
! 188: (sc->sc_arpcom.ac_enaddr[5] << 8);
! 189: sum = (sum & 0xffff) + (sum >> 16);
! 190: sum = (sum & 0xffff) + (sum >> 16);
! 191:
! 192: rom_sum = bus_space_read_1(iot, ioh, port);
! 193: rom_sum |= bus_space_read_1(iot, ioh, port << 8);
! 194:
! 195: if (sum != rom_sum) {
! 196: printf("%s: checksum mismatch; calculated %04x != read %04x",
! 197: sc->sc_dev.dv_xname, sum, rom_sum);
! 198: bus_space_unmap(iot, ioh, iosize);
! 199: return 0;
! 200: }
! 201: #endif
! 202:
! 203: bus_space_write_1(iot, ioh, DEPCA_CSR, DEPCA_CSR_NORMAL);
! 204:
! 205: ia->ia_iosize = iosize;
! 206: ia->ia_drq = DRQUNK;
! 207: bus_space_unmap(iot, ioh, ia->ia_iosize);
! 208: return 1;
! 209: }
! 210:
! 211: int
! 212: ne2100_isa_probe(struct le_softc *lesc, struct isa_attach_args *ia)
! 213: {
! 214: struct am7990_softc *sc = &lesc->sc_am7990;
! 215: bus_space_tag_t iot = lesc->sc_iot;
! 216: bus_space_handle_t ioh = lesc->sc_ioh;
! 217: int iosize = 24;
! 218: int i;
! 219:
! 220: if (bus_space_map(iot, ia->ia_iobase, iosize, 0, &ioh))
! 221: return (0);
! 222: lesc->sc_iot = iot;
! 223: lesc->sc_ioh = ioh;
! 224: lesc->sc_rap = NE2100_RAP;
! 225: lesc->sc_rdp = NE2100_RDP;
! 226: lesc->sc_card = NE2100;
! 227:
! 228: if (lance_isa_probe(sc) == 0) {
! 229: bus_space_unmap(iot, ioh, iosize);
! 230: return 0;
! 231: }
! 232:
! 233: /*
! 234: * Extract the physical MAC address from the ROM.
! 235: */
! 236: for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++)
! 237: sc->sc_arpcom.ac_enaddr[i] = bus_space_read_1(iot, ioh, i);
! 238:
! 239: ia->ia_iosize = iosize;
! 240: bus_space_unmap(iot, ioh, ia->ia_iosize);
! 241: return 1;
! 242: }
! 243:
! 244: int
! 245: bicc_isa_probe(struct le_softc *lesc, struct isa_attach_args *ia)
! 246: {
! 247: struct am7990_softc *sc = &lesc->sc_am7990;
! 248: bus_space_handle_t ioh;
! 249: bus_space_tag_t iot = ia->ia_iot;
! 250: int iosize = 16;
! 251: int i;
! 252:
! 253: if (bus_space_map(iot, ia->ia_iobase, iosize, 0, &ioh))
! 254: return (0);
! 255: lesc->sc_iot = iot;
! 256: lesc->sc_ioh = ioh;
! 257: lesc->sc_rap = BICC_RAP;
! 258: lesc->sc_rdp = BICC_RDP;
! 259: lesc->sc_card = BICC;
! 260:
! 261: if (lance_isa_probe(sc) == 0) {
! 262: bus_space_unmap(iot, ioh, iosize);
! 263: return 0;
! 264: }
! 265:
! 266: /*
! 267: * Extract the physical MAC address from the ROM.
! 268: */
! 269: for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++)
! 270: sc->sc_arpcom.ac_enaddr[i] = bus_space_read_1(iot, ioh, i * 2);
! 271:
! 272: ia->ia_iosize = iosize;
! 273: bus_space_unmap(iot, ioh, ia->ia_iosize);
! 274: return 1;
! 275: }
! 276:
! 277: /*
! 278: * Determine which chip is present on the card.
! 279: */
! 280: int
! 281: lance_isa_probe(struct am7990_softc *sc)
! 282: {
! 283:
! 284: /* Stop the LANCE chip and put it in a known state. */
! 285: le_isa_wrcsr(sc, LE_CSR0, LE_C0_STOP);
! 286: delay(100);
! 287:
! 288: if (le_isa_rdcsr(sc, LE_CSR0) != LE_C0_STOP)
! 289: return 0;
! 290:
! 291: le_isa_wrcsr(sc, LE_CSR3, sc->sc_conf3);
! 292: return 1;
! 293: }
! 294:
! 295: void
! 296: le_isa_attach(struct device *parent, struct device *self,
! 297: void *aux)
! 298: {
! 299: struct le_softc *lesc = (void *)self;
! 300: struct am7990_softc *sc = &lesc->sc_am7990;
! 301: struct isa_attach_args *ia = aux;
! 302: bus_space_tag_t iot = ia->ia_iot;
! 303: bus_space_handle_t ioh;
! 304:
! 305: if (bus_space_map(iot, ia->ia_iobase, ia->ia_iosize, 0, &ioh))
! 306: panic("%s: could not map I/O-ports", sc->sc_dev.dv_xname);
! 307: lesc->sc_iot = iot;
! 308: lesc->sc_ioh = ioh;
! 309:
! 310: printf(": %s Ethernet\n", card_type[lesc->sc_card]);
! 311:
! 312: if (lesc->sc_card == DEPCA) {
! 313: u_char *mem, val;
! 314: int i;
! 315:
! 316: mem = sc->sc_mem = ISA_HOLE_VADDR(ia->ia_maddr);
! 317:
! 318: val = 0xff;
! 319: for (;;) {
! 320: for (i = 0; i < ia->ia_msize; i++)
! 321: mem[i] = val;
! 322: for (i = 0; i < ia->ia_msize; i++)
! 323: if (mem[i] != val) {
! 324: printf("%s: failed to clear memory\n",
! 325: sc->sc_dev.dv_xname);
! 326: return;
! 327: }
! 328: if (val == 0x00)
! 329: break;
! 330: val -= 0x55;
! 331: }
! 332:
! 333: sc->sc_conf3 = LE_C3_ACON;
! 334: sc->sc_addr = 0;
! 335: sc->sc_memsize = ia->ia_msize;
! 336: } else {
! 337: sc->sc_mem = malloc(16384, M_DEVBUF, M_NOWAIT);
! 338: if (sc->sc_mem == 0) {
! 339: printf("%s: couldn't allocate memory for card\n",
! 340: sc->sc_dev.dv_xname);
! 341: return;
! 342: }
! 343:
! 344: sc->sc_conf3 = 0;
! 345: sc->sc_addr = kvtop(sc->sc_mem);
! 346: sc->sc_memsize = 16384;
! 347: }
! 348:
! 349: sc->sc_copytodesc = am7990_copytobuf_contig;
! 350: sc->sc_copyfromdesc = am7990_copyfrombuf_contig;
! 351: sc->sc_copytobuf = am7990_copytobuf_contig;
! 352: sc->sc_copyfrombuf = am7990_copyfrombuf_contig;
! 353: sc->sc_zerobuf = am7990_zerobuf_contig;
! 354:
! 355: sc->sc_rdcsr = le_isa_rdcsr;
! 356: sc->sc_wrcsr = le_isa_wrcsr;
! 357: sc->sc_hwreset = NULL;
! 358: sc->sc_hwinit = NULL;
! 359:
! 360: printf("%s", sc->sc_dev.dv_xname);
! 361: am7990_config(sc);
! 362:
! 363: #if NISADMA > 0
! 364: if (ia->ia_drq != DRQUNK)
! 365: isadma_cascade(ia->ia_drq);
! 366: #endif
! 367:
! 368: lesc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
! 369: IPL_NET, le_isa_intredge, sc, sc->sc_dev.dv_xname);
! 370: }
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