/* $OpenBSD: smc91cxx.c,v 1.35 2014/07/22 13:12:12 mpi Exp $ */ /* $NetBSD: smc91cxx.c,v 1.11 1998/08/08 23:51:41 mycroft Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. */ /* * Copyright (c) 1996 Gardner Buchanan * All rights reserved. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Gardner Buchanan. * 4. The name of Gardner Buchanan may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * from FreeBSD Id: if_sn.c,v 1.4 1996/03/18 15:47:16 gardner Exp */ /* * Core driver for the SMC 91Cxx family of Ethernet chips. * * Memory allocation interrupt logic is drived from an SMC 91C90 driver * written for NetBSD/amiga by Michael Hitch. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #if NBPFILTER > 0 #include #endif #include #include #include #include #include #ifndef __BUS_SPACE_HAS_STREAM_METHODS #define bus_space_write_multi_stream_2 bus_space_write_multi_2 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ /* XXX Hardware padding doesn't work yet(?) */ #define SMC91CXX_SW_PAD const char *smc91cxx_idstrs[] = { NULL, /* 0 */ NULL, /* 1 */ NULL, /* 2 */ "SMC91C90/91C92", /* 3 */ "SMC91C94/91C96", /* 4 */ "SMC91C95", /* 5 */ NULL, /* 6 */ "SMC91C100", /* 7 */ "SMC91C100FD", /* 8 */ NULL, /* 9 */ NULL, /* 10 */ NULL, /* 11 */ NULL, /* 12 */ NULL, /* 13 */ NULL, /* 14 */ NULL, /* 15 */ }; /* Supported media types. */ const int smc91cxx_media[] = { IFM_ETHER|IFM_10_T, IFM_ETHER|IFM_10_5, }; #define NSMC91CxxMEDIA (sizeof(smc91cxx_media) / sizeof(smc91cxx_media[0])) /* * MII bit-bang glue. */ u_int32_t smc91cxx_mii_bitbang_read(struct device *); void smc91cxx_mii_bitbang_write(struct device *, u_int32_t); const struct mii_bitbang_ops smc91cxx_mii_bitbang_ops = { smc91cxx_mii_bitbang_read, smc91cxx_mii_bitbang_write, { MR_MDO, /* MII_BIT_MDO */ MR_MDI, /* MII_BIT_MDI */ MR_MCLK, /* MII_BIT_MDC */ MR_MDOE, /* MII_BIT_DIR_HOST_PHY */ 0, /* MII_BIT_DIR_PHY_HOST */ } }; struct cfdriver sm_cd = { NULL, "sm", DV_IFNET }; /* MII callbacks */ int smc91cxx_mii_readreg(struct device *, int, int); void smc91cxx_mii_writereg(struct device *, int, int, int); void smc91cxx_statchg(struct device *); void smc91cxx_tick(void *); int smc91cxx_mediachange(struct ifnet *); void smc91cxx_mediastatus(struct ifnet *, struct ifmediareq *); int smc91cxx_set_media(struct smc91cxx_softc *, int); void smc91cxx_read(struct smc91cxx_softc *); void smc91cxx_reset(struct smc91cxx_softc *); void smc91cxx_start(struct ifnet *); void smc91cxx_resume(struct smc91cxx_softc *); void smc91cxx_watchdog(struct ifnet *); int smc91cxx_ioctl(struct ifnet *, u_long, caddr_t); static __inline int ether_cmp(void *, void *); static __inline int ether_cmp(va, vb) void *va, *vb; { u_int8_t *a = va; u_int8_t *b = vb; return ((a[5] != b[5]) || (a[4] != b[4]) || (a[3] != b[3]) || (a[2] != b[2]) || (a[1] != b[1]) || (a[0] != b[0])); } void smc91cxx_attach(sc, myea) struct smc91cxx_softc *sc; u_int8_t *myea; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; struct ifmedia *ifm = &sc->sc_mii.mii_media; u_int32_t miicapabilities; u_int16_t tmp; int i, aui; const char *idstr; /* Make sure the chip is stopped. */ smc91cxx_stop(sc); SMC_SELECT_BANK(sc, 3); tmp = bus_space_read_2(bst, bsh, REVISION_REG_W); sc->sc_chipid = RR_ID(tmp); /* check magic number */ if ((tmp & BSR_DETECT_MASK) != BSR_DETECT_VALUE) { idstr = NULL; printf("%s: invalid BSR 0x%04x\n", sc->sc_dev.dv_xname, tmp); } else idstr = smc91cxx_idstrs[RR_ID(tmp)]; #ifdef SMC_DEBUG printf("\n%s: ", sc->sc_dev.dv_xname); if (idstr != NULL) printf("%s, ", idstr); else printf("unknown chip id %d, ", sc->sc_chipid); printf("revision %d", RR_REV(tmp)); #endif /* Read the station address from the chip. */ SMC_SELECT_BANK(sc, 1); if (myea == NULL) { for (i = 0; i < ETHER_ADDR_LEN; i += 2) { tmp = bus_space_read_2(bst, bsh, IAR_ADDR0_REG_W + i); sc->sc_arpcom.ac_enaddr[i + 1] = (tmp >>8) & 0xff; sc->sc_arpcom.ac_enaddr[i] = tmp & 0xff; } } else { bcopy(myea, sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN); } printf(": address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr)); /* Initialize the ifnet structure. */ bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); ifp->if_softc = sc; ifp->if_start = smc91cxx_start; ifp->if_ioctl = smc91cxx_ioctl; ifp->if_watchdog = smc91cxx_watchdog; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; IFQ_SET_READY(&ifp->if_snd); /* Attach the interface. */ if_attach(ifp); ether_ifattach(ifp); /* * Initialize our media structures and MII info. We will * probe the MII if we are on the SMC91Cxx */ sc->sc_mii.mii_ifp = ifp; sc->sc_mii.mii_readreg = smc91cxx_mii_readreg; sc->sc_mii.mii_writereg = smc91cxx_mii_writereg; sc->sc_mii.mii_statchg = smc91cxx_statchg; ifmedia_init(ifm, 0, smc91cxx_mediachange, smc91cxx_mediastatus); SMC_SELECT_BANK(sc, 1); tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W); miicapabilities = BMSR_MEDIAMASK|BMSR_ANEG; switch (sc->sc_chipid) { case CHIP_91100: /* * The 91100 does not have full-duplex capabilities, * even if the PHY does. */ miicapabilities &= ~(BMSR_100TXFDX | BMSR_10TFDX); /* FALLTHROUGH */ case CHIP_91100FD: if (tmp & CR_MII_SELECT) { #ifdef SMC_DEBUG printf("%s: default media MII\n", sc->sc_dev.dv_xname); #endif mii_attach(&sc->sc_dev, &sc->sc_mii, miicapabilities, MII_PHY_ANY, MII_OFFSET_ANY, 0); if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) { ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL); ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE); } else { ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO); } sc->sc_flags |= SMC_FLAGS_HAS_MII; break; } /* FALLTHROUGH */ default: aui = tmp & CR_AUI_SELECT; #ifdef SMC_DEBUG printf("%s: default media %s\n", sc->sc_dev.dv_xname, aui ? "AUI" : "UTP"); #endif for (i = 0; i < NSMC91CxxMEDIA; i++) ifmedia_add(ifm, smc91cxx_media[i], 0, NULL); ifmedia_set(ifm, IFM_ETHER | (aui ? IFM_10_5 : IFM_10_T)); break; } /* The attach is successful. */ sc->sc_flags |= SMC_FLAGS_ATTACHED; } /* * Change media according to request. */ int smc91cxx_mediachange(ifp) struct ifnet *ifp; { struct smc91cxx_softc *sc = ifp->if_softc; return (smc91cxx_set_media(sc, sc->sc_mii.mii_media.ifm_media)); } int smc91cxx_set_media(sc, media) struct smc91cxx_softc *sc; int media; { bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; /* * If the interface is not currently powered on, just return. * When it is enabled later, smc91cxx_init() will properly set * up the media for us. */ if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0) return (0); if (IFM_TYPE(media) != IFM_ETHER) return (EINVAL); if (sc->sc_flags & SMC_FLAGS_HAS_MII) return (mii_mediachg(&sc->sc_mii)); switch (IFM_SUBTYPE(media)) { case IFM_10_T: case IFM_10_5: SMC_SELECT_BANK(sc, 1); tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W); if (IFM_SUBTYPE(media) == IFM_10_5) tmp |= CR_AUI_SELECT; else tmp &= ~CR_AUI_SELECT; bus_space_write_2(bst, bsh, CONFIG_REG_W, tmp); delay(20000); /* XXX is this needed? */ break; default: return (EINVAL); } return (0); } /* * Notify the world which media we're using. */ void smc91cxx_mediastatus(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct smc91cxx_softc *sc = ifp->if_softc; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0) { ifmr->ifm_active = IFM_ETHER | IFM_NONE; ifmr->ifm_status = 0; return; } /* * If we have MII, go ask the PHY what's going on. */ if (sc->sc_flags & SMC_FLAGS_HAS_MII) { mii_pollstat(&sc->sc_mii); ifmr->ifm_active = sc->sc_mii.mii_media_active; ifmr->ifm_status = sc->sc_mii.mii_media_status; return; } SMC_SELECT_BANK(sc, 1); tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W); ifmr->ifm_active = IFM_ETHER | ((tmp & CR_AUI_SELECT) ? IFM_10_5 : IFM_10_T); } /* * Reset and initialize the chip. */ void smc91cxx_init(sc) struct smc91cxx_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; int s, i; s = splnet(); /* * This resets the registers mostly to defaults, but doesn't * affect the EEPROM. After the reset cycle, we pause briefly * for the chip to recover. * * XXX how long are we really supposed to delay? --thorpej */ SMC_SELECT_BANK(sc, 0); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, RCR_SOFTRESET); delay(100); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0); delay(200); bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0); /* Set the Ethernet address. */ SMC_SELECT_BANK(sc, 1); for (i = 0; i < ETHER_ADDR_LEN; i++ ) bus_space_write_1(bst, bsh, IAR_ADDR0_REG_W + i, sc->sc_arpcom.ac_enaddr[i]); /* * Set the control register to automatically release successfully * transmitted packets (making the best use of our limited memory) * and enable the EPH interrupt on certain TX errors. */ bus_space_write_2(bst, bsh, CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE | CTR_CR_ENABLE | CTR_LE_ENABLE)); /* * Reset the MMU and wait for it to be un-busy. */ SMC_SELECT_BANK(sc, 2); bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_RESET); while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; /* * Disable all interrupts. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0); /* * Set current media. */ smc91cxx_set_media(sc, sc->sc_mii.mii_media.ifm_cur->ifm_media); /* * Set the receive filter. We want receive enable and auto * strip of CRC from received packet. If we are in promisc. mode, * then set that bit as well. * * XXX Initialize multicast filter. For now, we just accept * XXX all multicast. */ SMC_SELECT_BANK(sc, 0); tmp = RCR_ENABLE | RCR_STRIP_CRC | RCR_ALMUL; if (ifp->if_flags & IFF_PROMISC) tmp |= RCR_PROMISC; bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, tmp); /* * Set transmitter control to "enabled". */ tmp = TCR_ENABLE; #ifndef SMC91CXX_SW_PAD /* * Enable hardware padding of transmitted packets. * XXX doesn't work? */ tmp |= TCR_PAD_ENABLE; #endif bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, tmp); /* * Now, enable interrupts. */ SMC_SELECT_BANK(sc, 2); bus_space_write_1(bst, bsh, INTR_MASK_REG_B, IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT | IM_TX_INT); /* Interface is now running, with no output active. */ ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; if (sc->sc_flags & SMC_FLAGS_HAS_MII) { /* Start the one second clock. */ timeout_set(&sc->sc_mii_timeout, smc91cxx_tick, sc); timeout_add_sec(&sc->sc_mii_timeout, 1); } /* * Attempt to start any pending transmission. */ smc91cxx_start(ifp); splx(s); } /* * Start output on an interface. * Must be called at splnet or interrupt level. */ void smc91cxx_start(ifp) struct ifnet *ifp; { struct smc91cxx_softc *sc = ifp->if_softc; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int len; struct mbuf *m, *top; u_int16_t length, npages; u_int8_t packetno; int timo, pad; if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) return; again: /* * Peek at the next packet. */ IFQ_POLL(&ifp->if_snd, m); if (m == NULL) return; /* * Compute the frame length and set pad to give an overall even * number of bytes. Below, we assume that the packet length * is even. */ for (len = 0, top = m; m != NULL; m = m->m_next) len += m->m_len; pad = (len & 1); /* * We drop packets that are too large. Perhaps we should * truncate them instead? */ if ((len + pad) > (ETHER_MAX_LEN - ETHER_CRC_LEN)) { printf("%s: large packet discarded\n", sc->sc_dev.dv_xname); ifp->if_oerrors++; IFQ_DEQUEUE(&ifp->if_snd, m); m_freem(m); goto readcheck; } #ifdef SMC91CXX_SW_PAD /* * Not using hardware padding; pad to ETHER_MIN_LEN. */ if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len; #endif length = pad + len; /* * The MMU has a 256 byte page size. The MMU expects us to * ask for "npages - 1". We include space for the status word, * byte count, and control bytes in the allocation request. */ npages = (length + 6) >> 8; /* * Now allocate the memory. */ SMC_SELECT_BANK(sc, 2); bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ALLOC | npages); timo = MEMORY_WAIT_TIME; do { if (bus_space_read_1(bst, bsh, INTR_STAT_REG_B) & IM_ALLOC_INT) break; delay(1); } while (--timo); packetno = bus_space_read_1(bst, bsh, ALLOC_RESULT_REG_B); if (packetno & ARR_FAILED || timo == 0) { /* * No transmit memory is available. Record the number * of requestd pages and enable the allocation completion * interrupt. Set up the watchdog timer in case we miss * the interrupt. Mark the interface as active so that * no one else attempts to transmit while we're allocating * memory. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, bus_space_read_1(bst, bsh, INTR_MASK_REG_B) | IM_ALLOC_INT); ifp->if_timer = 5; ifp->if_flags |= IFF_OACTIVE; return; } /* * We have a packet number - set the data window. */ bus_space_write_1(bst, bsh, PACKET_NUM_REG_B, packetno); /* * Point to the beginning of the packet. */ bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_AUTOINC /* | 0x0000 */); /* * Send the packet length (+6 for stats, length, and control bytes) * and the status word (set to zeros). */ bus_space_write_2(bst, bsh, DATA_REG_W, 0); bus_space_write_1(bst, bsh, DATA_REG_B, (length + 6) & 0xff); bus_space_write_1(bst, bsh, DATA_REG_B, ((length + 6) >> 8) & 0xff); /* * Get the packet from the kernel. This will include the Ethernet * frame header, MAC address, etc. */ IFQ_DEQUEUE(&ifp->if_snd, m); /* * Push the packet out to the card. */ for (top = m; m != NULL; m = m->m_next) { /* Words... */ if (m->m_len > 1) bus_space_write_multi_stream_2(bst, bsh, DATA_REG_W, mtod(m, u_int16_t *), m->m_len >> 1); /* ...and the remaining byte, if any. */ if (m->m_len & 1) bus_space_write_1(bst, bsh, DATA_REG_B, *(u_int8_t *)(mtod(m, u_int8_t *) + (m->m_len - 1))); } #ifdef SMC91CXX_SW_PAD /* * Push out padding. */ while (pad > 1) { bus_space_write_2(bst, bsh, DATA_REG_W, 0); pad -= 2; } if (pad) bus_space_write_1(bst, bsh, DATA_REG_B, 0); #endif /* * Push out control byte and unused packet byte. The control byte * is 0, meaning the packet is even lengthed and no special * CRC handling is necessary. */ bus_space_write_2(bst, bsh, DATA_REG_W, 0); /* * Enable transmit interrupts and let the chip go. Set a watchdog * in case we miss the interrupt. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, bus_space_read_1(bst, bsh, INTR_MASK_REG_B) | IM_TX_INT | IM_TX_EMPTY_INT); bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ENQUEUE); ifp->if_timer = 5; #if NBPFILTER > 0 /* Hand off a copy to the bpf. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, top, BPF_DIRECTION_OUT); #endif ifp->if_opackets++; m_freem(top); readcheck: /* * Check for incoming pcakets. We don't want to overflow the small * RX FIFO. If nothing has arrived, attempt to queue another * transmit packet. */ if (bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W) & FIFO_REMPTY) goto again; } /* * Interrupt service routine. */ int smc91cxx_intr(arg) void *arg; { struct smc91cxx_softc *sc = arg; struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int8_t mask, interrupts, status; u_int16_t packetno, tx_status, card_stats; if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0 || (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) return (0); SMC_SELECT_BANK(sc, 2); /* * Obtain the current interrupt mask. */ mask = bus_space_read_1(bst, bsh, INTR_MASK_REG_B); /* * Get the set of interrupt which occurred and eliminate any * which are not enabled. */ interrupts = bus_space_read_1(bst, bsh, INTR_STAT_REG_B); status = interrupts & mask; /* Ours? */ if (status == 0) return (0); /* * It's ours; disable all interrupts while we process them. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0); /* * Receive overrun interrupts. */ if (status & IM_RX_OVRN_INT) { bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_RX_OVRN_INT); ifp->if_ierrors++; } /* * Receive interrupts. */ if (status & IM_RCV_INT) { #if 1 /* DIAGNOSTIC */ packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W); if (packetno & FIFO_REMPTY) { printf("%s: receive interrupt on empty fifo\n", sc->sc_dev.dv_xname); goto out; } else #endif smc91cxx_read(sc); } /* * Memory allocation interrupts. */ if (status & IM_ALLOC_INT) { /* Disable this interrupt. */ mask &= ~IM_ALLOC_INT; /* * Release the just-allocated memory. We will reallocate * it through the normal start logic. */ while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_FREEPKT); ifp->if_flags &= ~IFF_OACTIVE; ifp->if_timer = 0; } /* * Transmit complete interrupt. Handle transmission error messages. * This will only be called on error condition because of AUTO RELEASE * mode. */ if (status & IM_TX_INT) { bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_TX_INT); packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W) & FIFO_TX_MASK; /* * Select this as the packet to read from. */ bus_space_write_1(bst, bsh, PACKET_NUM_REG_B, packetno); /* * Position the pointer to the beginning of the packet. */ bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_AUTOINC | PTR_READ /* | 0x0000 */); /* * Fetch the TX status word. This will be a copy of * the EPH_STATUS_REG_W at the time of the transmission * failure. */ tx_status = bus_space_read_2(bst, bsh, DATA_REG_W); if (tx_status & EPHSR_TX_SUC) printf("%s: successful packet caused TX interrupt?!\n", sc->sc_dev.dv_xname); else ifp->if_oerrors++; if (tx_status & EPHSR_LATCOL) ifp->if_collisions++; /* * Some of these errors disable the transmitter; reenable it. */ SMC_SELECT_BANK(sc, 0); #ifdef SMC91CXX_SW_PAD bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, TCR_ENABLE); #else bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE); #endif /* * Kill the failed packet and wait for the MMU to unbusy. */ SMC_SELECT_BANK(sc, 2); while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_FREEPKT); ifp->if_timer = 0; } /* * Transmit underrun interrupts. We use this opportunity to * update transmit statistics from the card. */ if (status & IM_TX_EMPTY_INT) { bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_TX_EMPTY_INT); /* Disable this interrupt. */ mask &= ~IM_TX_EMPTY_INT; SMC_SELECT_BANK(sc, 0); card_stats = bus_space_read_2(bst, bsh, COUNTER_REG_W); /* Single collisions. */ ifp->if_collisions += card_stats & ECR_COLN_MASK; /* Multiple collisions. */ ifp->if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4; SMC_SELECT_BANK(sc, 2); ifp->if_timer = 0; } /* * Other errors. Reset the interface. */ if (status & IM_EPH_INT) { smc91cxx_stop(sc); smc91cxx_init(sc); } /* * Attempt to queue more packets for transmission. */ smc91cxx_start(ifp); out: /* * Reenable the interrupts we wish to receive now that processing * is complete. */ mask |= bus_space_read_1(bst, bsh, INTR_MASK_REG_B); bus_space_write_1(bst, bsh, INTR_MASK_REG_B, mask); return (1); } /* * Read a packet from the card and pass it up to the kernel. * NOTE! WE EXPECT TO BE IN REGISTER WINDOW 2! */ void smc91cxx_read(sc) struct smc91cxx_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; struct mbuf *m; u_int16_t status, packetno, packetlen; u_int8_t *data; again: /* * Set data pointer to the beginning of the packet. Since * PTR_RCV is set, the packet number will be found automatically * in FIFO_PORTS_REG_W, FIFO_RX_MASK. */ bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC /* | 0x0000 */); /* * First two words are status and packet length. */ status = bus_space_read_2(bst, bsh, DATA_REG_W); packetlen = bus_space_read_2(bst, bsh, DATA_REG_W); /* * The packet length includes 3 extra words: status, length, * and an extra word that includes the control byte. */ packetlen -= 6; /* * Account for receive errors and discard. */ if (status & RS_ERRORS) { ifp->if_ierrors++; goto out; } /* * Adjust for odd-length packet. */ if (status & RS_ODDFRAME) packetlen++; /* * Allocate a header mbuf. */ MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) goto out; m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = packetlen; /* * Always put the packet in a cluster. * XXX should chain small mbufs if less than threshold. */ MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_freem(m); ifp->if_ierrors++; printf("%s: can't allocate cluster for incoming packet\n", sc->sc_dev.dv_xname); goto out; } /* * Pull the packet off the interface. Make sure the payload * is aligned. */ m->m_data = (caddr_t) ALIGN(mtod(m, caddr_t) + sizeof(struct ether_header)) - sizeof(struct ether_header); data = mtod(m, u_int8_t *); if (packetlen > 1) bus_space_read_multi_stream_2(bst, bsh, DATA_REG_W, (u_int16_t *)data, packetlen >> 1); if (packetlen & 1) { data += packetlen & ~1; *data = bus_space_read_1(bst, bsh, DATA_REG_B); } ifp->if_ipackets++; #if NBPFILTER > 0 /* * Hand the packet off to bpf listeners. If there's a bpf listener, * we need to check if the packet is ours. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_IN); #endif m->m_pkthdr.len = m->m_len = packetlen; ether_input_mbuf(ifp, m); out: /* * Tell the card to free the memory occupied by this packet. */ while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_RELEASE); /* * Check for another packet. */ packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W); if (packetno & FIFO_REMPTY) return; goto again; } /* * Process an ioctl request. */ int smc91cxx_ioctl(ifp, cmd, data) struct ifnet *ifp; u_long cmd; caddr_t data; { struct smc91cxx_softc *sc = ifp->if_softc; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; s = splnet(); switch (cmd) { case SIOCSIFADDR: if ((error = smc91cxx_enable(sc)) != 0) break; ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: smc91cxx_init(sc); arp_ifinit(&sc->sc_arpcom, ifa); break; #endif default: smc91cxx_init(sc); break; } break; case SIOCSIFFLAGS: if ((ifp->if_flags & IFF_UP) == 0 && (ifp->if_flags & IFF_RUNNING) != 0) { /* * If interface is marked down and it is running, * stop it. */ smc91cxx_stop(sc); ifp->if_flags &= ~IFF_RUNNING; smc91cxx_disable(sc); } else if ((ifp->if_flags & IFF_UP) != 0 && (ifp->if_flags & IFF_RUNNING) == 0) { /* * If interface is marked up and it is stopped, * start it. */ if ((error = smc91cxx_enable(sc)) != 0) break; smc91cxx_init(sc); } else if ((ifp->if_flags & IFF_UP) != 0) { /* * Reset the interface to pick up changes in any * other flags that affect hardware registers. */ smc91cxx_reset(sc); } break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd); break; default: error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data); } if (error == ENETRESET) { if (ifp->if_flags & IFF_RUNNING) smc91cxx_reset(sc); error = 0; } splx(s); return (error); } /* * Reset the interface. */ void smc91cxx_reset(sc) struct smc91cxx_softc *sc; { int s; s = splnet(); smc91cxx_stop(sc); smc91cxx_init(sc); splx(s); } /* * Watchdog timer. */ void smc91cxx_watchdog(ifp) struct ifnet *ifp; { struct smc91cxx_softc *sc = ifp->if_softc; log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); ++sc->sc_arpcom.ac_if.if_oerrors; smc91cxx_reset(sc); } /* * Stop output on the interface. */ void smc91cxx_stop(sc) struct smc91cxx_softc *sc; { bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; /* * Clear interrupt mask; disable all interrupts. */ SMC_SELECT_BANK(sc, 2); bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0); /* * Disable transmitter and receiver. */ SMC_SELECT_BANK(sc, 0); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0); bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0); /* * Cancel watchdog timer. */ sc->sc_arpcom.ac_if.if_timer = 0; } /* * Enable power on the interface. */ int smc91cxx_enable(sc) struct smc91cxx_softc *sc; { if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0 && sc->sc_enable != NULL) { if ((*sc->sc_enable)(sc) != 0) { printf("%s: device enable failed\n", sc->sc_dev.dv_xname); return (EIO); } } sc->sc_flags |= SMC_FLAGS_ENABLED; return (0); } /* * Disable power on the interface. */ void smc91cxx_disable(sc) struct smc91cxx_softc *sc; { if ((sc->sc_flags & SMC_FLAGS_ENABLED) != 0 && sc->sc_disable != NULL) { (*sc->sc_disable)(sc); sc->sc_flags &= ~SMC_FLAGS_ENABLED; } } int smc91cxx_activate(self, act) struct device *self; int act; { #if 0 struct smc91cxx_softc *sc = (struct smc91cxx_softc *)self; #endif int rv = 0, s; s = splnet(); switch (act) { case DVACT_DEACTIVATE: #if 0 if_deactivate(&sc->sc_ic.ic_if); #endif break; } splx(s); return(rv); } int smc91cxx_detach(self, flags) struct device *self; int flags; { struct smc91cxx_softc *sc = (struct smc91cxx_softc *)self; struct ifnet *ifp = &sc->sc_arpcom.ac_if; /* Succeed now if there's no work to do. */ if ((sc->sc_flags & SMC_FLAGS_ATTACHED) == 0) return(0); /* smc91cxx_disable() checks SMC_FLAGS_ENABLED */ smc91cxx_disable(sc); /* smc91cxx_attach() never fails */ /* Delete all media. */ ifmedia_delete_instance(&sc->sc_mii.mii_media, IFM_INST_ANY); #if NBPFILTER > 0 bpfdetach(ifp); #endif ether_ifdetach(ifp); if_detach(ifp); return (0); } u_int32_t smc91cxx_mii_bitbang_read(self) struct device *self; { struct smc91cxx_softc *sc = (void *) self; /* We're already in bank 3. */ return (bus_space_read_2(sc->sc_bst, sc->sc_bsh, MGMT_REG_W)); } void smc91cxx_mii_bitbang_write(self, val) struct device *self; u_int32_t val; { struct smc91cxx_softc *sc = (void *) self; /* We're already in bank 3. */ bus_space_write_2(sc->sc_bst, sc->sc_bsh, MGMT_REG_W, val); } int smc91cxx_mii_readreg(self, phy, reg) struct device *self; int phy, reg; { struct smc91cxx_softc *sc = (void *) self; int val; SMC_SELECT_BANK(sc, 3); val = mii_bitbang_readreg(self, &smc91cxx_mii_bitbang_ops, phy, reg); SMC_SELECT_BANK(sc, 2); return (val); } void smc91cxx_mii_writereg(self, phy, reg, val) struct device *self; int phy, reg, val; { struct smc91cxx_softc *sc = (void *) self; SMC_SELECT_BANK(sc, 3); mii_bitbang_writereg(self, &smc91cxx_mii_bitbang_ops, phy, reg, val); SMC_SELECT_BANK(sc, 2); } void smc91cxx_statchg(self) struct device *self; { struct smc91cxx_softc *sc = (struct smc91cxx_softc *)self; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; int mctl; SMC_SELECT_BANK(sc, 0); mctl = bus_space_read_2(bst, bsh, TXMIT_CONTROL_REG_W); if (sc->sc_mii.mii_media_active & IFM_FDX) mctl |= TCR_SWFDUP; else mctl &= ~TCR_SWFDUP; bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, mctl); SMC_SELECT_BANK(sc, 2); /* back to operating window */ } /* * One second timer, used to tick the MII. */ void smc91cxx_tick(arg) void *arg; { struct smc91cxx_softc *sc = arg; int s; #ifdef DIAGNOSTIC if ((sc->sc_flags & SMC_FLAGS_HAS_MII) == 0) panic("smc91cxx_tick"); #endif if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) return; s = splnet(); mii_tick(&sc->sc_mii); splx(s); timeout_add_sec(&sc->sc_mii_timeout, 1); }