1 /* $NetBSD: if_le_dec.c,v 1.5 1997/03/17 03:19:11 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1995 Charles M. Hannum. All rights reserved. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Ralph Campbell and Rick Macklem. 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)if_le.c 8.2 (Berkeley) 11/16/93 40 */ 41 42 #include "bpfilter.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/mbuf.h> 47 #include <sys/syslog.h> 48 #include <sys/socket.h> 49 #include <sys/device.h> 50 51 #include <net/if.h> 52 #include <net/if_ether.h> 53 #include <net/if_media.h> 54 55 #ifdef INET 56 #include <netinet/in.h> 57 #include <netinet/if_inarp.h> 58 #endif 59 60 #include <dev/ic/am7990reg.h> 61 #include <dev/ic/am7990var.h> 62 63 #include <dev/tc/if_levar.h> 64 #include <dev/tc/tcvar.h> 65 66 /* access LANCE registers */ 67 void le_dec_writereg __P((volatile u_short *regptr, u_short val)); 68 #define LERDWR(cntl, src, dst) { (dst) = (src); tc_mb(); } 69 #define LEWREG(src, dst) le_dec_writereg(&(dst), (src)) 70 71 hide void le_dec_wrcsr __P((struct am7990_softc *, u_int16_t, u_int16_t)); 72 hide u_int16_t le_dec_rdcsr __P((struct am7990_softc *, u_int16_t)); 73 74 void 75 dec_le_common_attach(sc, eap) 76 struct am7990_softc *sc; 77 u_char *eap; 78 { 79 int i; 80 81 sc->sc_rdcsr = le_dec_rdcsr; 82 sc->sc_wrcsr = le_dec_wrcsr; 83 sc->sc_hwinit = NULL; 84 85 sc->sc_conf3 = 0; 86 sc->sc_addr = 0; 87 sc->sc_memsize = 65536; 88 89 /* 90 * Get the ethernet address out of rom 91 */ 92 for (i = 0; i < sizeof(sc->sc_enaddr); i++) { 93 sc->sc_enaddr[i] = *eap; 94 eap += 4; 95 } 96 97 am7990_config(sc); 98 } 99 100 hide void 101 le_dec_wrcsr(sc, port, val) 102 struct am7990_softc *sc; 103 u_int16_t port, val; 104 { 105 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1; 106 107 LEWREG(port, ler1->ler1_rap); 108 LERDWR(port, val, ler1->ler1_rdp); 109 } 110 111 hide u_int16_t 112 le_dec_rdcsr(sc, port) 113 struct am7990_softc *sc; 114 u_int16_t port; 115 { 116 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1; 117 u_int16_t val; 118 119 LEWREG(port, ler1->ler1_rap); 120 LERDWR(0, ler1->ler1_rdp, val); 121 return (val); 122 } 123 124 /* 125 * Write a lance register port, reading it back to ensure success. This seems 126 * to be necessary during initialization, since the chip appears to be a bit 127 * pokey sometimes. 128 */ 129 void 130 le_dec_writereg(regptr, val) 131 register volatile u_short *regptr; 132 register u_short val; 133 { 134 register int i = 0; 135 136 while (*regptr != val) { 137 *regptr = val; 138 tc_mb(); 139 if (++i > 10000) { 140 printf("le: Reg did not settle (to x%x): x%x\n", val, 141 *regptr); 142 return; 143 } 144 DELAY(100); 145 } 146 } 147 148 /* 149 * Routines for accessing the transmit and receive buffers are provided 150 * by am7990.c, because of the LE_NEED_BUF_* macros defined above. 151 * Unfortunately, CPU addressing of these buffers is done in one of 152 * 3 ways: 153 * - contiguous (for the 3max and turbochannel option card) 154 * - gap2, which means shorts (2 bytes) interspersed with short (2 byte) 155 * spaces (for the pmax) 156 * - gap16, which means 16bytes interspersed with 16byte spaces 157 * for buffers which must begin on a 32byte boundary (for 3min, maxine, 158 * and alpha) 159 * The buffer offset is the logical byte offset, assuming contiguous storage. 160 */ 161