1 /* $NetBSD: if_le_dec.c,v 1.3 1996/10/13 01:38:38 christos 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 53 #ifdef INET 54 #include <netinet/in.h> 55 #include <netinet/if_ether.h> 56 #endif 57 58 #include <dev/ic/am7990reg.h> 59 #include <dev/ic/am7990var.h> 60 61 #include <dev/tc/if_levar.h> 62 #include <dev/tc/tcvar.h> 63 64 /* access LANCE registers */ 65 void le_dec_writereg __P((volatile u_short *regptr, u_short val)); 66 #define LERDWR(cntl, src, dst) { (dst) = (src); tc_mb(); } 67 #define LEWREG(src, dst) le_dec_writereg(&(dst), (src)) 68 69 hide void le_dec_wrcsr __P((struct am7990_softc *, u_int16_t, u_int16_t)); 70 hide u_int16_t le_dec_rdcsr __P((struct am7990_softc *, u_int16_t)); 71 72 void 73 dec_le_common_attach(sc, eap) 74 struct am7990_softc *sc; 75 u_char *eap; 76 { 77 int i; 78 79 sc->sc_rdcsr = le_dec_rdcsr; 80 sc->sc_wrcsr = le_dec_wrcsr; 81 sc->sc_hwinit = NULL; 82 83 sc->sc_conf3 = 0; 84 sc->sc_addr = 0; 85 sc->sc_memsize = 65536; 86 87 /* 88 * Get the ethernet address out of rom 89 */ 90 for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++) { 91 sc->sc_arpcom.ac_enaddr[i] = *eap; 92 eap += 4; 93 } 94 95 am7990_config(sc); 96 } 97 98 hide void 99 le_dec_wrcsr(sc, port, val) 100 struct am7990_softc *sc; 101 u_int16_t port, val; 102 { 103 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1; 104 105 LEWREG(port, ler1->ler1_rap); 106 LERDWR(port, val, ler1->ler1_rdp); 107 } 108 109 hide u_int16_t 110 le_dec_rdcsr(sc, port) 111 struct am7990_softc *sc; 112 u_int16_t port; 113 { 114 struct lereg1 *ler1 = ((struct le_softc *)sc)->sc_r1; 115 u_int16_t val; 116 117 LEWREG(port, ler1->ler1_rap); 118 LERDWR(0, ler1->ler1_rdp, val); 119 return (val); 120 } 121 122 /* 123 * Write a lance register port, reading it back to ensure success. This seems 124 * to be necessary during initialization, since the chip appears to be a bit 125 * pokey sometimes. 126 */ 127 void 128 le_dec_writereg(regptr, val) 129 register volatile u_short *regptr; 130 register u_short val; 131 { 132 register int i = 0; 133 134 while (*regptr != val) { 135 *regptr = val; 136 tc_mb(); 137 if (++i > 10000) { 138 printf("le: Reg did not settle (to x%x): x%x\n", val, 139 *regptr); 140 return; 141 } 142 DELAY(100); 143 } 144 } 145 146 /* 147 * Routines for accessing the transmit and receive buffers are provided 148 * by am7990.c, because of the LE_NEED_BUF_* macros defined above. 149 * Unfortunately, CPU addressing of these buffers is done in one of 150 * 3 ways: 151 * - contiguous (for the 3max and turbochannel option card) 152 * - gap2, which means shorts (2 bytes) interspersed with short (2 byte) 153 * spaces (for the pmax) 154 * - gap16, which means 16bytes interspersed with 16byte spaces 155 * for buffers which must begin on a 32byte boundary (for 3min, maxine, 156 * and alpha) 157 * The buffer offset is the logical byte offset, assuming contiguous storage. 158 */ 159