Annotation of sys/dev/dec/if_le_dec.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: if_le_dec.c,v 1.4 2007/06/18 21:24:43 jasper Exp $ */
! 2: /* $NetBSD: if_le_dec.c,v 1.12 2001/11/13 12:49:45 lukem Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1997 Jonathan Stone. All rights reserved.
! 6: * Copyright (c) 1995 Charles M. Hannum. All rights reserved.
! 7: * Copyright (c) 1992, 1993
! 8: * The Regents of the University of California. All rights reserved.
! 9: *
! 10: * This code is derived from software contributed to Berkeley by
! 11: * Ralph Campbell and Rick Macklem.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * @(#)if_le.c 8.2 (Berkeley) 11/16/93
! 38: */
! 39:
! 40: #include <sys/param.h>
! 41: #include <sys/systm.h>
! 42: #include <sys/mbuf.h>
! 43: #include <sys/syslog.h>
! 44: #include <sys/socket.h>
! 45: #include <sys/device.h>
! 46:
! 47: #include <net/if.h>
! 48: #include <net/if_media.h>
! 49:
! 50: #ifdef INET
! 51: #include <netinet/in.h>
! 52: #include <netinet/if_ether.h>
! 53: #endif
! 54:
! 55: #include <dev/ic/am7990reg.h>
! 56: #include <dev/ic/am7990var.h>
! 57:
! 58: #include <dev/tc/if_levar.h>
! 59: #include <dev/tc/tcvar.h>
! 60:
! 61: #include <machine/bus.h>
! 62:
! 63: /* access LANCE registers */
! 64: void le_dec_writereg(volatile u_short *regptr, u_short val);
! 65: #define LERDWR(cntl, src, dst) { (dst) = (src); tc_mb(); }
! 66: #define LEWREG(src, dst) le_dec_writereg(&(dst), (src))
! 67:
! 68: void le_dec_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
! 69: u_int16_t le_dec_rdcsr(struct am7990_softc *, u_int16_t);
! 70:
! 71: void
! 72: dec_le_common_attach(struct am7990_softc *sc, u_char *eap)
! 73: {
! 74: int i;
! 75:
! 76: sc->sc_rdcsr = le_dec_rdcsr;
! 77: sc->sc_wrcsr = le_dec_wrcsr;
! 78: sc->sc_hwinit = NULL;
! 79:
! 80: sc->sc_conf3 = 0;
! 81: sc->sc_addr = 0;
! 82: sc->sc_memsize = 65536;
! 83:
! 84: /*
! 85: * Get the ethernet address out of rom
! 86: */
! 87: for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++) {
! 88: sc->sc_arpcom.ac_enaddr[i] = *eap;
! 89: eap += 4;
! 90: }
! 91:
! 92: am7990_config(sc);
! 93: }
! 94:
! 95: void
! 96: le_dec_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val)
! 97: {
! 98: struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
! 99:
! 100: LEWREG(port, ler1->ler1_rap);
! 101: LERDWR(port, val, ler1->ler1_rdp);
! 102: }
! 103:
! 104: u_int16_t
! 105: le_dec_rdcsr(struct am7990_softc *sc, u_int16_t port)
! 106: {
! 107: struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1;
! 108: u_int16_t val;
! 109:
! 110: LEWREG(port, ler1->ler1_rap);
! 111: LERDWR(0, ler1->ler1_rdp, val);
! 112: return (val);
! 113: }
! 114:
! 115: /*
! 116: * Write a lance register port, reading it back to ensure success. This seems
! 117: * to be necessary during initialization, since the chip appears to be a bit
! 118: * pokey sometimes.
! 119: */
! 120: void
! 121: le_dec_writereg(volatile u_short *regptr, u_short val)
! 122: {
! 123: int i = 0;
! 124:
! 125: while (*regptr != val) {
! 126: *regptr = val;
! 127: tc_mb();
! 128: if (++i > 10000) {
! 129: printf("le: Reg did not settle (to x%x): x%x\n", val,
! 130: *regptr);
! 131: return;
! 132: }
! 133: DELAY(100);
! 134: }
! 135: }
! 136:
! 137: /*
! 138: * Routines for accessing the transmit and receive buffers are provided
! 139: * by am7990.c, because of the LE_NEED_BUF_* macros defined above.
! 140: * Unfortunately, CPU addressing of these buffers is done in one of
! 141: * 3 ways:
! 142: * - contiguous (for the 3max and turbochannel option card)
! 143: * - gap2, which means shorts (2 bytes) interspersed with short (2 byte)
! 144: * spaces (for the pmax, vax 3400, and ioasic LANCE descriptors)
! 145: * - gap16, which means 16bytes interspersed with 16byte spaces
! 146: * for buffers which must begin on a 32byte boundary (for 3min, maxine,
! 147: * and alpha)
! 148: * The buffer offset is the logical byte offset, assuming contiguous storage.
! 149: */
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