/* $NetBSD: if_le_ledma.c,v 1.35 2010/01/19 22:07:43 pooka Exp $ */ /*- * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace * Simulation Facility, NASA Ames Research Center; Paul Kranenburg. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: if_le_ledma.c,v 1.35 2010/01/19 22:07:43 pooka Exp $"); #include "opt_inet.h" #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #include #include #include #include #include #include #include #include #include #include #include "ioconf.h" /* * LANCE registers. */ #define LEREG1_RDP 0 /* Register Data port */ #define LEREG1_RAP 2 /* Register Address port */ struct le_softc { struct am7990_softc sc_am7990; /* glue to MI code */ bus_space_tag_t sc_bustag; bus_dmamap_t sc_dmamap; bus_space_handle_t sc_reg; /* LANCE registers */ struct lsi64854_softc *sc_dma; /* pointer to my dma */ u_int sc_laddr; /* LANCE DMA address */ u_int sc_lostcount; #define LE_LOSTTHRESH 5 /* lost carrior count to switch media */ }; #define MEMSIZE (16*1024) /* LANCE memory size */ #define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */ int lematch_ledma(device_t, cfdata_t, void *); void leattach_ledma(device_t, device_t, void *); /* * Media types supported by the Sun4m. */ static int lemedia[] = { IFM_ETHER|IFM_10_T, IFM_ETHER|IFM_10_5, IFM_ETHER|IFM_AUTO, }; #define NLEMEDIA __arraycount(lemedia) void lesetutp(struct lance_softc *); void lesetaui(struct lance_softc *); int lemediachange(struct lance_softc *); void lemediastatus(struct lance_softc *, struct ifmediareq *); CFATTACH_DECL_NEW(le_ledma, sizeof(struct le_softc), lematch_ledma, leattach_ledma, NULL, NULL); #if defined(_KERNEL_OPT) #include "opt_ddb.h" #endif static void lewrcsr(struct lance_softc *, uint16_t, uint16_t); static uint16_t lerdcsr(struct lance_softc *, uint16_t); static void lehwreset(struct lance_softc *); static void lehwinit(struct lance_softc *); static void lenocarrier(struct lance_softc *); static void lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) { struct le_softc *lesc = (struct le_softc *)sc; bus_space_tag_t t = lesc->sc_bustag; bus_space_handle_t h = lesc->sc_reg; bus_space_write_2(t, h, LEREG1_RAP, port); bus_space_write_2(t, h, LEREG1_RDP, val); #if defined(SUN4M) /* * We need to flush the Sbus->Mbus write buffers. This can most * easily be accomplished by reading back the register that we * just wrote (thanks to Chris Torek for this solution). */ (void)bus_space_read_2(t, h, LEREG1_RDP); #endif } static uint16_t lerdcsr(struct lance_softc *sc, uint16_t port) { struct le_softc *lesc = (struct le_softc *)sc; bus_space_tag_t t = lesc->sc_bustag; bus_space_handle_t h = lesc->sc_reg; bus_space_write_2(t, h, LEREG1_RAP, port); return (bus_space_read_2(t, h, LEREG1_RDP)); } void lesetutp(struct lance_softc *sc) { struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma; uint32_t csr; csr = L64854_GCSR(dma); csr |= E_TP_AUI; L64854_SCSR(dma, csr); delay(20000); /* must not touch le for 20ms */ } void lesetaui(struct lance_softc *sc) { struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma; uint32_t csr; csr = L64854_GCSR(dma); csr &= ~E_TP_AUI; L64854_SCSR(dma, csr); delay(20000); /* must not touch le for 20ms */ } int lemediachange(struct lance_softc *sc) { struct ifmedia *ifm = &sc->sc_media; if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) return (EINVAL); /* * Switch to the selected media. If autoselect is * set, we don't really have to do anything. We'll * switch to the other media when we detect loss of * carrier. */ switch (IFM_SUBTYPE(ifm->ifm_media)) { case IFM_10_T: lesetutp(sc); break; case IFM_10_5: lesetaui(sc); break; case IFM_AUTO: break; default: return (EINVAL); } return (0); } void lemediastatus(struct lance_softc *sc, struct ifmediareq *ifmr) { struct lsi64854_softc *dma = ((struct le_softc *)sc)->sc_dma; /* * Notify the world which media we're currently using. */ if (L64854_GCSR(dma) & E_TP_AUI) ifmr->ifm_active = IFM_ETHER|IFM_10_T; else ifmr->ifm_active = IFM_ETHER|IFM_10_5; } static void lehwreset(struct lance_softc *sc) { struct le_softc *lesc = (struct le_softc *)sc; struct lsi64854_softc *dma = lesc->sc_dma; uint32_t csr; u_int aui_bit; /* * Reset DMA channel. */ csr = L64854_GCSR(dma); aui_bit = csr & E_TP_AUI; DMA_RESET(dma); /* Write bits 24-31 of Lance address */ bus_space_write_4(dma->sc_bustag, dma->sc_regs, L64854_REG_ENBAR, lesc->sc_laddr & 0xff000000); DMA_ENINTR(dma); /* * Disable E-cache invalidates on chip writes. * Retain previous cable selection bit. */ csr = L64854_GCSR(dma); csr |= (E_DSBL_WR_INVAL | aui_bit); L64854_SCSR(dma, csr); delay(20000); /* must not touch le for 20ms */ } static void lehwinit(struct lance_softc *sc) { /* * Make sure we're using the currently-enabled media type. * XXX Actually, this is probably unnecessary, now. */ switch (IFM_SUBTYPE(sc->sc_media.ifm_cur->ifm_media)) { case IFM_10_T: lesetutp(sc); break; case IFM_10_5: lesetaui(sc); break; } } static void lenocarrier(struct lance_softc *sc) { struct le_softc *lesc = (struct le_softc *)sc; /* it may take a while for modern switches to set 10baseT media */ if (lesc->sc_lostcount++ < LE_LOSTTHRESH) return; lesc->sc_lostcount = 0; /* * Check if the user has requested a certain cable type, and * if so, honor that request. */ printf("%s: lost carrier on ", device_xname(sc->sc_dev)); if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) { printf("UTP port"); switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { case IFM_10_5: case IFM_AUTO: printf(", switching to AUI port"); lesetaui(sc); } } else { printf("AUI port"); switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { case IFM_10_T: case IFM_AUTO: printf(", switching to UTP port"); lesetutp(sc); } } printf("\n"); } int lematch_ledma(device_t parent, cfdata_t cf, void *aux) { struct sbus_attach_args *sa = aux; return (strcmp(cf->cf_name, sa->sa_name) == 0); } void leattach_ledma(device_t parent, device_t self, void *aux) { struct le_softc *lesc = device_private(self); struct lance_softc *sc = &lesc->sc_am7990.lsc; struct lsi64854_softc *lsi = device_private(parent); struct sbus_attach_args *sa = aux; bus_dma_tag_t dmatag = sa->sa_dmatag; bus_dma_segment_t seg; int rseg, error; sc->sc_dev = self; lesc->sc_bustag = sa->sa_bustag; /* Establish link to `ledma' device */ lesc->sc_dma = lsi; lesc->sc_dma->sc_client = lesc; /* Map device registers */ if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, sa->sa_offset, sa->sa_size, 0, &lesc->sc_reg) != 0) { aprint_error(": cannot map registers\n"); return; } /* Allocate buffer memory */ sc->sc_memsize = MEMSIZE; /* Get a DMA handle */ if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE, LEDMA_BOUNDARY, BUS_DMA_NOWAIT, &lesc->sc_dmamap)) != 0) { aprint_error(": DMA map create error %d\n", error); return; } /* Allocate DMA buffer */ if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, LEDMA_BOUNDARY, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { aprint_error(": DMA buffer alloc error %d\n",error); return; } /* Map DMA buffer into kernel space */ if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE, (void **)&sc->sc_mem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { aprint_error(": DMA buffer map error %d\n", error); bus_dmamem_free(dmatag, &seg, rseg); return; } /* Load DMA buffer */ if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem, MEMSIZE, NULL, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { aprint_error(": DMA buffer map load error %d\n", error); bus_dmamem_free(dmatag, &seg, rseg); bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE); return; } lesc->sc_laddr = lesc->sc_dmamap->dm_segs[0].ds_addr; sc->sc_addr = lesc->sc_laddr & 0xffffff; sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; lesc->sc_lostcount = 0; sc->sc_mediachange = lemediachange; sc->sc_mediastatus = lemediastatus; sc->sc_supmedia = lemedia; sc->sc_nsupmedia = NLEMEDIA; sc->sc_defaultmedia = IFM_ETHER|IFM_AUTO; prom_getether(sa->sa_node, sc->sc_enaddr); sc->sc_copytodesc = lance_copytobuf_contig; sc->sc_copyfromdesc = lance_copyfrombuf_contig; sc->sc_copytobuf = lance_copytobuf_contig; sc->sc_copyfrombuf = lance_copyfrombuf_contig; sc->sc_zerobuf = lance_zerobuf_contig; sc->sc_rdcsr = lerdcsr; sc->sc_wrcsr = lewrcsr; sc->sc_hwinit = lehwinit; sc->sc_nocarrier = lenocarrier; sc->sc_hwreset = lehwreset; /* Establish interrupt handler */ if (sa->sa_nintr != 0) (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_NET, am7990_intr, sc); am7990_config(&lesc->sc_am7990); /* now initialize DMA */ lehwreset(sc); }