Annotation of sys/dev/sbus/if_le_ledma.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: if_le_ledma.c,v 1.13 2007/05/31 17:23:14 sobrado Exp $ */
! 2: /* $NetBSD: if_le_ledma.c,v 1.14 2001/05/30 11:46:35 mrg 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: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: #include "bpfilter.h"
! 42:
! 43: #include <sys/param.h>
! 44: #include <sys/systm.h>
! 45: #include <sys/mbuf.h>
! 46: #include <sys/syslog.h>
! 47: #include <sys/socket.h>
! 48: #include <sys/device.h>
! 49: #include <sys/malloc.h>
! 50:
! 51: #include <net/if.h>
! 52: #include <net/if_media.h>
! 53:
! 54: #ifdef INET
! 55: #include <netinet/in.h>
! 56: #include <netinet/if_ether.h>
! 57: #endif
! 58:
! 59: #include <machine/bus.h>
! 60: #include <machine/intr.h>
! 61: #include <machine/autoconf.h>
! 62:
! 63: #include <dev/sbus/sbusvar.h>
! 64:
! 65: #include <dev/ic/lsi64854reg.h>
! 66: #include <dev/ic/lsi64854var.h>
! 67:
! 68: #include <dev/ic/am7990reg.h>
! 69: #include <dev/ic/am7990var.h>
! 70:
! 71: /*
! 72: * LANCE registers.
! 73: */
! 74: #define LEREG1_RDP 0 /* Register Data port */
! 75: #define LEREG1_RAP 2 /* Register Address port */
! 76:
! 77: struct le_softc {
! 78: struct am7990_softc sc_am7990; /* glue to MI code */
! 79: bus_space_tag_t sc_bustag;
! 80: bus_dmamap_t sc_dmamap;
! 81: bus_space_handle_t sc_reg; /* LANCE registers */
! 82: struct lsi64854_softc *sc_dma; /* pointer to my dma */
! 83: u_int sc_laddr; /* LANCE DMA address */
! 84: };
! 85:
! 86: #define MEMSIZE (16*1024) /* LANCE memory size */
! 87: #define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */
! 88:
! 89: int lematch_ledma(struct device *, void *, void *);
! 90: void leattach_ledma(struct device *, struct device *, void *);
! 91:
! 92: /*
! 93: * Media types supported by the Sun4m.
! 94: */
! 95:
! 96: void le_ledma_setutp(struct am7990_softc *);
! 97: void le_ledma_setaui(struct am7990_softc *);
! 98:
! 99: int lemediachange(struct ifnet *);
! 100: void lemediastatus(struct ifnet *, struct ifmediareq *);
! 101:
! 102: struct cfattach le_ledma_ca = {
! 103: sizeof(struct le_softc), lematch_ledma, leattach_ledma
! 104: };
! 105:
! 106: void le_ledma_wrcsr(struct am7990_softc *, u_int16_t, u_int16_t);
! 107: u_int16_t le_ledma_rdcsr(struct am7990_softc *, u_int16_t);
! 108: void le_ledma_hwreset(struct am7990_softc *);
! 109: void le_ledma_hwinit(struct am7990_softc *);
! 110: void le_ledma_nocarrier(struct am7990_softc *);
! 111:
! 112: void
! 113: le_ledma_wrcsr(struct am7990_softc *sc, u_int16_t port, u_int16_t val)
! 114: {
! 115: struct le_softc *lesc = (struct le_softc *)sc;
! 116:
! 117: bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
! 118: bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2,
! 119: BUS_SPACE_BARRIER_WRITE);
! 120: bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, val);
! 121: bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, 2,
! 122: BUS_SPACE_BARRIER_WRITE);
! 123:
! 124: #if defined(SUN4M)
! 125: /*
! 126: * We need to flush the SBus->MBus write buffers. This can most
! 127: * easily be accomplished by reading back the register that we
! 128: * just wrote (thanks to Chris Torek for this solution).
! 129: */
! 130: if (CPU_ISSUN4M) {
! 131: volatile u_int16_t discard;
! 132: discard = bus_space_read_2(lesc->sc_bustag, lesc->sc_reg,
! 133: LEREG1_RDP);
! 134: }
! 135: #endif
! 136: }
! 137:
! 138: u_int16_t
! 139: le_ledma_rdcsr(struct am7990_softc *sc, u_int16_t port)
! 140: {
! 141: struct le_softc *lesc = (struct le_softc *)sc;
! 142:
! 143: bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
! 144: bus_space_barrier(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, 2,
! 145: BUS_SPACE_BARRIER_WRITE);
! 146: return (bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP));
! 147: }
! 148:
! 149: void
! 150: le_ledma_setutp(struct am7990_softc *sc)
! 151: {
! 152: struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
! 153: u_int32_t csr;
! 154:
! 155: csr = L64854_GCSR(dma);
! 156: csr |= E_TP_AUI;
! 157: L64854_SCSR(dma, csr);
! 158: delay(20000); /* must not touch le for 20ms */
! 159: }
! 160:
! 161: void
! 162: le_ledma_setaui(struct am7990_softc *sc)
! 163: {
! 164: struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
! 165: u_int32_t csr;
! 166:
! 167: csr = L64854_GCSR(dma);
! 168: csr &= ~E_TP_AUI;
! 169: L64854_SCSR(dma, csr);
! 170: delay(20000); /* must not touch le for 20ms */
! 171: }
! 172:
! 173: int
! 174: lemediachange(struct ifnet *ifp)
! 175: {
! 176: struct am7990_softc *sc = ifp->if_softc;
! 177: struct ifmedia *ifm = &sc->sc_ifmedia;
! 178:
! 179: if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
! 180: return (EINVAL);
! 181:
! 182: /*
! 183: * Switch to the selected media. If autoselect is
! 184: * set, we don't really have to do anything. We'll
! 185: * switch to the other media when we detect loss of
! 186: * carrier.
! 187: */
! 188: switch (IFM_SUBTYPE(ifm->ifm_media)) {
! 189: case IFM_10_T:
! 190: le_ledma_setutp(sc);
! 191: break;
! 192:
! 193: case IFM_10_5:
! 194: le_ledma_setaui(sc);
! 195: break;
! 196:
! 197: case IFM_AUTO:
! 198: break;
! 199:
! 200: default:
! 201: return (EINVAL);
! 202: }
! 203:
! 204: return (0);
! 205: }
! 206:
! 207: void
! 208: lemediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
! 209: {
! 210: struct am7990_softc *sc = ifp->if_softc;
! 211: struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma;
! 212:
! 213: /*
! 214: * Notify the world which media we're currently using.
! 215: */
! 216: if (L64854_GCSR(dma) & E_TP_AUI)
! 217: ifmr->ifm_active = IFM_ETHER|IFM_10_T;
! 218: else
! 219: ifmr->ifm_active = IFM_ETHER|IFM_10_5;
! 220: }
! 221:
! 222: void
! 223: le_ledma_hwreset(struct am7990_softc *sc)
! 224: {
! 225: struct le_softc *lesc = (struct le_softc *)sc;
! 226: struct lsi64854_softc *dma = lesc->sc_dma;
! 227: u_int32_t csr;
! 228: u_int aui_bit;
! 229:
! 230: /*
! 231: * Reset DMA channel.
! 232: */
! 233: csr = L64854_GCSR(dma);
! 234: aui_bit = csr & E_TP_AUI;
! 235: DMA_RESET(dma);
! 236:
! 237: /* Write bits 24-31 of Lance address */
! 238: bus_space_write_4(dma->sc_bustag, dma->sc_regs, L64854_REG_ENBAR,
! 239: lesc->sc_laddr & 0xff000000);
! 240:
! 241: DMA_ENINTR(dma);
! 242:
! 243: /*
! 244: * Disable E-cache invalidates on chip writes.
! 245: * Retain previous cable selection bit.
! 246: */
! 247: csr = L64854_GCSR(dma);
! 248: csr |= (E_DSBL_WR_INVAL | aui_bit);
! 249: L64854_SCSR(dma, csr);
! 250: delay(20000); /* must not touch le for 20ms */
! 251: }
! 252:
! 253: void
! 254: le_ledma_hwinit(struct am7990_softc *sc)
! 255: {
! 256:
! 257: /*
! 258: * Make sure we're using the currently-enabled media type.
! 259: * XXX Actually, this is probably unnecessary, now.
! 260: */
! 261: switch (IFM_SUBTYPE(sc->sc_ifmedia.ifm_cur->ifm_media)) {
! 262: case IFM_10_T:
! 263: le_ledma_setutp(sc);
! 264: break;
! 265:
! 266: case IFM_10_5:
! 267: le_ledma_setaui(sc);
! 268: break;
! 269: }
! 270: }
! 271:
! 272: void
! 273: le_ledma_nocarrier(struct am7990_softc *sc)
! 274: {
! 275: struct le_softc *lesc = (struct le_softc *)sc;
! 276:
! 277: /*
! 278: * Check if the user has requested a certain cable type, and
! 279: * if so, honor that request.
! 280: */
! 281:
! 282: if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
! 283: switch (IFM_SUBTYPE(sc->sc_ifmedia.ifm_media)) {
! 284: case IFM_10_5:
! 285: case IFM_AUTO:
! 286: printf("%s: lost carrier on UTP port"
! 287: ", switching to AUI port\n", sc->sc_dev.dv_xname);
! 288: le_ledma_setaui(sc);
! 289: }
! 290: } else {
! 291: switch (IFM_SUBTYPE(sc->sc_ifmedia.ifm_media)) {
! 292: case IFM_10_T:
! 293: case IFM_AUTO:
! 294: printf("%s: lost carrier on AUI port"
! 295: ", switching to UTP port\n", sc->sc_dev.dv_xname);
! 296: le_ledma_setutp(sc);
! 297: }
! 298: }
! 299: }
! 300:
! 301: int
! 302: lematch_ledma(struct device *parent, void *vcf, void *aux)
! 303: {
! 304: struct cfdata *cf = vcf;
! 305: struct sbus_attach_args *sa = aux;
! 306:
! 307: return (strcmp(cf->cf_driver->cd_name, sa->sa_name) == 0);
! 308: }
! 309:
! 310:
! 311: void
! 312: leattach_ledma(struct device *parent, struct device *self, void *aux)
! 313: {
! 314: struct sbus_attach_args *sa = aux;
! 315: struct le_softc *lesc = (struct le_softc *)self;
! 316: struct lsi64854_softc *lsi = (struct lsi64854_softc *)parent;
! 317: struct am7990_softc *sc = &lesc->sc_am7990;
! 318: bus_dma_tag_t dmatag = sa->sa_dmatag;
! 319: bus_dma_segment_t seg;
! 320: int rseg, error;
! 321: /* XXX the following declarations should be elsewhere */
! 322: extern void myetheraddr(u_char *);
! 323:
! 324: lesc->sc_bustag = sa->sa_bustag;
! 325:
! 326: /* Establish link to `ledma' device */
! 327: lesc->sc_dma = lsi;
! 328: lesc->sc_dma->sc_client = lesc;
! 329:
! 330: /* Map device registers */
! 331: if (sbus_bus_map(sa->sa_bustag,
! 332: sa->sa_slot,
! 333: sa->sa_offset,
! 334: sa->sa_size,
! 335: BUS_SPACE_MAP_LINEAR,
! 336: 0, &lesc->sc_reg) != 0) {
! 337: printf("%s @ ledma: cannot map registers\n", self->dv_xname);
! 338: return;
! 339: }
! 340:
! 341: /* Allocate buffer memory */
! 342: sc->sc_memsize = MEMSIZE;
! 343:
! 344: /* Get a DMA handle */
! 345: if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE,
! 346: LEDMA_BOUNDARY, BUS_DMA_NOWAIT,
! 347: &lesc->sc_dmamap)) != 0) {
! 348: printf("%s: DMA map create error %d\n", self->dv_xname, error);
! 349: return;
! 350: }
! 351:
! 352: /* Allocate DMA buffer */
! 353: if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, LEDMA_BOUNDARY,
! 354: &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) {
! 355: printf("%s @ ledma: DMA buffer alloc error %d\n",
! 356: self->dv_xname, error);
! 357: return;
! 358: }
! 359:
! 360: /* Map DMA buffer into kernel space */
! 361: if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE,
! 362: (caddr_t *)&sc->sc_mem,
! 363: BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
! 364: printf("%s @ ledma: DMA buffer map error %d\n",
! 365: self->dv_xname, error);
! 366: bus_dmamem_free(dmatag, &seg, rseg);
! 367: return;
! 368: }
! 369:
! 370: /* Load DMA buffer */
! 371: if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem,
! 372: MEMSIZE, NULL, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
! 373: printf("%s: DMA buffer map load error %d\n",
! 374: self->dv_xname, error);
! 375: bus_dmamem_free(dmatag, &seg, rseg);
! 376: bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE);
! 377: return;
! 378: }
! 379:
! 380: lesc->sc_laddr = lesc->sc_dmamap->dm_segs[0].ds_addr;
! 381: sc->sc_addr = lesc->sc_laddr & 0xffffff;
! 382: sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
! 383:
! 384: ifmedia_init(&sc->sc_ifmedia, 0, lemediachange, lemediastatus);
! 385: ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_10_T, 0, NULL);
! 386: ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_10_5, 0, NULL);
! 387: ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO, 0, NULL);
! 388: ifmedia_set(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO);
! 389: sc->sc_hasifmedia = 1;
! 390:
! 391: myetheraddr(sc->sc_arpcom.ac_enaddr);
! 392:
! 393: sc->sc_copytodesc = am7990_copytobuf_contig;
! 394: sc->sc_copyfromdesc = am7990_copyfrombuf_contig;
! 395: sc->sc_copytobuf = am7990_copytobuf_contig;
! 396: sc->sc_copyfrombuf = am7990_copyfrombuf_contig;
! 397: sc->sc_zerobuf = am7990_zerobuf_contig;
! 398:
! 399: sc->sc_rdcsr = le_ledma_rdcsr;
! 400: sc->sc_wrcsr = le_ledma_wrcsr;
! 401: sc->sc_hwinit = le_ledma_hwinit;
! 402: sc->sc_nocarrier = le_ledma_nocarrier;
! 403: sc->sc_hwreset = le_ledma_hwreset;
! 404:
! 405: /* Establish interrupt handler */
! 406: if (sa->sa_nintr != 0)
! 407: (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET, 0,
! 408: am7990_intr, sc, self->dv_xname);
! 409:
! 410: am7990_config(&lesc->sc_am7990);
! 411:
! 412: /* now initialize DMA */
! 413: le_ledma_hwreset(sc);
! 414: }
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