1 /* $OpenBSD: if_le_lebuffer.c,v 1.9 2008/06/26 05:42:18 ray Exp $ */ 2 /* $NetBSD: if_le_lebuffer.c,v 1.10 2002/03/11 16:00:56 pk 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 Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace 10 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg. 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 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "bpfilter.h" 35 36 #include <sys/cdefs.h> 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/syslog.h> 41 #include <sys/socket.h> 42 #include <sys/device.h> 43 #include <sys/malloc.h> 44 45 #include <net/if.h> 46 #include <net/if_media.h> 47 48 #ifdef INET 49 #include <netinet/in.h> 50 #include <netinet/if_ether.h> 51 #endif 52 53 #include <machine/bus.h> 54 #include <machine/intr.h> 55 #include <machine/autoconf.h> 56 57 #include <dev/sbus/sbusvar.h> 58 #include <dev/sbus/lebuffervar.h> 59 60 #include <dev/ic/am7990reg.h> 61 #include <dev/ic/am7990var.h> 62 63 /* 64 * LANCE registers. 65 */ 66 #define LEREG1_RDP 0 /* Register Data port */ 67 #define LEREG1_RAP 2 /* Register Address port */ 68 69 struct le_softc { 70 struct am7990_softc sc_am7990; /* glue to MI code */ 71 bus_space_tag_t sc_bustag; 72 bus_dma_tag_t sc_dmatag; 73 bus_space_handle_t sc_reg; /* LANCE registers */ 74 }; 75 76 77 int lematch_lebuffer(struct device *, void *, void *); 78 void leattach_lebuffer(struct device *, struct device *, void *); 79 80 struct cfattach le_lebuffer_ca = { 81 sizeof(struct le_softc), lematch_lebuffer, leattach_lebuffer 82 }; 83 84 extern struct cfdriver le_cd; 85 86 struct cfdriver lebuffer_cd = { 87 NULL, "lebuffer", DV_DULL 88 }; 89 90 void le_lebuffer_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t); 91 u_int16_t le_lebuffer_rdcsr(struct am7990_softc *, u_int16_t); 92 93 void 94 le_lebuffer_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val) 95 { 96 struct le_softc *lesc = (struct le_softc *)sc; 97 98 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port); 99 bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2, 100 BUS_SPACE_BARRIER_WRITE); 101 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, val); 102 bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, 2, 103 BUS_SPACE_BARRIER_WRITE); 104 105 #if defined(SUN4M) 106 /* 107 * We need to flush the SBus->MBus write buffers. This can most 108 * easily be accomplished by reading back the register that we 109 * just wrote (thanks to Chris Torek for this solution). 110 */ 111 if (CPU_ISSUN4M) { 112 volatile u_int16_t discard; 113 discard = bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, 114 LEREG1_RDP); 115 } 116 #endif 117 } 118 119 u_int16_t 120 le_lebuffer_rdcsr(struct am7990_softc *sc, u_int16_t port) 121 { 122 struct le_softc *lesc = (struct le_softc *)sc; 123 124 bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port); 125 bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2, 126 BUS_SPACE_BARRIER_WRITE); 127 return (bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP)); 128 } 129 130 int 131 lematch_lebuffer(struct device *parent, void *vcf, void *aux) 132 { 133 struct sbus_attach_args *sa = aux; 134 struct cfdata *cf = vcf; 135 136 return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0); 137 } 138 139 140 void 141 leattach_lebuffer(struct device *parent, struct device *self, void *aux) 142 { 143 struct sbus_attach_args *sa = aux; 144 struct le_softc *lesc = (struct le_softc *)self; 145 struct am7990_softc *sc = &lesc->sc_am7990; 146 struct lebuf_softc *lebuf = (struct lebuf_softc *)parent; 147 /* XXX the following declarations should be elsewhere */ 148 extern void myetheraddr(u_char *); 149 150 lesc->sc_bustag = sa->sa_bustag; 151 lesc->sc_dmatag = sa->sa_dmatag; 152 153 if (sbus_bus_map(sa->sa_bustag, 154 sa->sa_slot, sa->sa_offset, sa->sa_size, 155 0, 0, &lesc->sc_reg)) { 156 printf(": cannot map registers\n"); 157 return; 158 } 159 160 sc->sc_mem = lebuf->sc_buffer; 161 sc->sc_memsize = lebuf->sc_bufsiz; 162 sc->sc_addr = 0; /* Lance view is offset by buffer location */ 163 lebuf->attached = 1; 164 165 /* That old black magic... */ 166 sc->sc_conf3 = getpropint(sa->sa_node, "busmaster-regval", 167 LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON); 168 169 myetheraddr(sc->sc_arpcom.ac_enaddr); 170 171 sc->sc_copytodesc = am7990_copytobuf_contig; 172 sc->sc_copyfromdesc = am7990_copyfrombuf_contig; 173 sc->sc_copytobuf = am7990_copytobuf_contig; 174 sc->sc_copyfrombuf = am7990_copyfrombuf_contig; 175 sc->sc_zerobuf = am7990_zerobuf_contig; 176 177 sc->sc_rdcsr = le_lebuffer_rdcsr; 178 sc->sc_wrcsr = le_lebuffer_wrcsr; 179 180 am7990_config(&lesc->sc_am7990); 181 182 /* Establish interrupt handler */ 183 if (sa->sa_nintr != 0) 184 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri, 185 IPL_NET, 0, am7990_intr, sc, self->dv_xname); 186 } 187