/* $NetBSD: smc91cxx.c,v 1.90 2015/08/30 04:11:40 dholland 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 __KERNEL_RCSID(0, "$NetBSD: smc91cxx.c,v 1.90 2015/08/30 04:11:40 dholland Exp $"); #include "opt_inet.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #include #include #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 #define bus_space_write_stream_4 bus_space_write_4 #define bus_space_read_stream_4 bus_space_read_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 */ "SMC91C111", /* 9 */ NULL, /* 10 */ NULL, /* 11 */ NULL, /* 12 */ NULL, /* 13 */ NULL, /* 14 */ NULL, /* 15 */ }; /* Supported media types. */ static 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(device_t); void smc91cxx_mii_bitbang_write(device_t, u_int32_t); static 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 */ } }; /* MII callbacks */ int smc91cxx_mii_readreg(device_t, int, int); void smc91cxx_mii_writereg(device_t, int, int, int); void smc91cxx_statchg(struct ifnet *); 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_init(struct smc91cxx_softc *); void smc91cxx_read(struct smc91cxx_softc *); void smc91cxx_reset(struct smc91cxx_softc *); void smc91cxx_start(struct ifnet *); uint8_t smc91cxx_copy_tx_frame(struct smc91cxx_softc *, struct mbuf *); void smc91cxx_resume(struct smc91cxx_softc *); void smc91cxx_stop(struct smc91cxx_softc *); void smc91cxx_watchdog(struct ifnet *); int smc91cxx_ioctl(struct ifnet *, u_long, void *); static inline int ether_cmp(const void *, const void *); static inline int ether_cmp(const void *va, const void *vb) { const u_int8_t *a = va; const 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])); } static inline void smc91cxx_intr_mask_write(bus_space_tag_t bst, bus_space_handle_t bsh, uint8_t mask) { KDASSERT((mask & IM_ERCV_INT) == 0); #ifdef SMC91CXX_NO_BYTE_WRITE bus_space_write_2(bst, bsh, INTR_STAT_REG_B, mask << 8); #else bus_space_write_1(bst, bsh, INTR_MASK_REG_B, mask); #endif KDASSERT(!(bus_space_read_1(bst, bsh, INTR_MASK_REG_B) & IM_ERCV_INT)); } static inline void smc91cxx_intr_ack_write(bus_space_tag_t bst, bus_space_handle_t bsh, uint8_t ack, uint8_t mask) { #ifdef SMC91CXX_NO_BYTE_WRITE bus_space_write_2(bst, bsh, INTR_ACK_REG_B, ack | (mask << 8)); #else bus_space_write_1(bst, bsh, INTR_ACK_REG_B, ack); #endif KDASSERT(!(bus_space_read_1(bst, bsh, INTR_MASK_REG_B) & IM_ERCV_INT)); } void smc91cxx_attach(struct smc91cxx_softc *sc, u_int8_t *myea) { struct ifnet *ifp = &sc->sc_ec.ec_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; const char *idstr; u_int32_t miicapabilities; u_int16_t tmp; u_int8_t enaddr[ETHER_ADDR_LEN]; int i, aui, mult, scale, memsize; char pbuf[9]; tmp = bus_space_read_2(bst, bsh, BANK_SELECT_REG_W); /* check magic number */ if ((tmp & BSR_DETECT_MASK) != BSR_DETECT_VALUE) { aprint_error_dev(sc->sc_dev, "failed to detect chip, bsr=%04x\n", tmp); return; } /* 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); idstr = smc91cxx_idstrs[sc->sc_chipid]; aprint_normal_dev(sc->sc_dev, ""); if (idstr != NULL) aprint_normal("%s, ", idstr); else aprint_normal("unknown chip id %d, ", sc->sc_chipid); aprint_normal("revision %d, ", RR_REV(tmp)); SMC_SELECT_BANK(sc, 0); switch (sc->sc_chipid) { default: mult = MCR_MEM_MULT(bus_space_read_2(bst, bsh, MEM_CFG_REG_W)); scale = MIR_SCALE_91C9x; break; case CHIP_91C111: mult = MIR_MULT_91C111; scale = MIR_SCALE_91C111; } memsize = bus_space_read_2(bst, bsh, MEM_INFO_REG_W) & MIR_TOTAL_MASK; if (memsize == 255) memsize++; memsize *= scale * mult; format_bytes(pbuf, sizeof(pbuf), memsize); aprint_normal("buffer size: %s\n", pbuf); /* Read the station address from the chip. */ SMC_SELECT_BANK(sc, 1); if (myea == NULL) { myea = enaddr; for (i = 0; i < ETHER_ADDR_LEN; i += 2) { tmp = bus_space_read_2(bst, bsh, IAR_ADDR0_REG_W + i); myea[i + 1] = (tmp >> 8) & 0xff; myea[i] = tmp & 0xff; } } aprint_normal_dev(sc->sc_dev, "MAC address %s, ", ether_sprintf(myea)); /* Initialize the ifnet structure. */ strlcpy(ifp->if_xname, device_xname(sc->sc_dev), 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, myea); /* * 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, IFM_IMASK, 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: case CHIP_91C111: if (tmp & CR_MII_SELECT) { aprint_normal("default media MII"); if (sc->sc_chipid == CHIP_91C111) { aprint_normal(" (%s PHY)\n", (tmp & CR_AUI_SELECT) ? "external" : "internal"); sc->sc_internal_phy = !(tmp & CR_AUI_SELECT); } else aprint_normal("\n"); 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; } else if (sc->sc_chipid == CHIP_91C111) { /* * XXX: Should bring it out of low-power mode */ aprint_normal("EPH interface in low power mode\n"); sc->sc_internal_phy = 0; return; } /*FALLTHROUGH*/ default: aprint_normal("default media %s\n", (aui = (tmp & CR_AUI_SELECT)) ? "AUI" : "UTP"); 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; } rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), RND_TYPE_NET, RND_FLAG_DEFAULT); callout_init(&sc->sc_mii_callout, 0); /* The attach is successful. */ sc->sc_flags |= SMC_FLAGS_ATTACHED; } /* * Change media according to request. */ int smc91cxx_mediachange(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(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; int rc; /* * 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) == 0 || (rc = mii_mediachg(&sc->sc_mii)) == ENXIO) rc = 0; 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 rc; } /* * Notify the world which media we're using. */ void smc91cxx_mediastatus(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(struct smc91cxx_softc *sc) { struct ifnet *ifp = &sc->sc_ec.ec_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; const u_int8_t *enaddr; int s, i; s = splnet(); /* * This resets the registers mostly to defaults, but doesn't * affect the EEPROM. The longest reset recovery time of those devices * supported is the 91C111. Section 7.8 of its datasheet asks for 50ms. */ SMC_SELECT_BANK(sc, 0); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, RCR_SOFTRESET); delay(5); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0); delay(50000); bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0); /* Set the Ethernet address. */ SMC_SELECT_BANK(sc, 1); enaddr = (const u_int8_t *)CLLADDR(ifp->if_sadl); for (i = 0; i < ETHER_ADDR_LEN; i += 2) { tmp = enaddr[i + 1] << 8 | enaddr[i]; bus_space_write_2(bst, bsh, IAR_ADDR0_REG_W + i, tmp); } /* * 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); sc->sc_txpacketno = ARR_FAILED; for (;;) { tmp = bus_space_read_2(bst, bsh, MMU_CMD_REG_W); if (tmp == 0xffff) { /* card went away! */ splx(s); return; } if ((tmp & MMUCR_BUSY) == 0) break; } /* * Disable all interrupts. */ smc91cxx_intr_mask_write(bst, bsh, 0); /* * On the 91c111, enable auto-negotiation, and set the LED * status pins to something sane. * XXX: Should be some way for MD code to decide the latter. */ SMC_SELECT_BANK(sc, 0); if (sc->sc_chipid == CHIP_91C111) { bus_space_write_2(bst, bsh, RX_PHY_CONTROL_REG_W, RPC_ANEG | (RPC_LS_LINK_DETECT << RPC_LSA_SHIFT) | (RPC_LS_TXRX << RPC_LSB_SHIFT)); } /* * 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); sc->sc_intmask = IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT; if (sc->sc_chipid == CHIP_91C111 && sc->sc_internal_phy) { sc->sc_intmask |= IM_MD_INT; } smc91cxx_intr_mask_write(bst, bsh, sc->sc_intmask); /* 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. */ callout_reset(&sc->sc_mii_callout, hz, smc91cxx_tick, sc); } /* * 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(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; u_int16_t length, npages; u_int16_t oddbyte; 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; m != NULL; m = m->m_next) len += m->m_len; /* * We drop packets that are too large. Perhaps we should * truncate them instead? */ if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN)) { printf("%s: large packet discarded\n", device_xname(sc->sc_dev)); ifp->if_oerrors++; IFQ_DEQUEUE(&ifp->if_snd, m); m_freem(m); goto readcheck; } pad = 0; #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 & ~1) + 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; if (__predict_false((sc->sc_txpacketno & ARR_FAILED) == 0)) { packetno = sc->sc_txpacketno; sc->sc_txpacketno = ARR_FAILED; } else { 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 requested 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. */ sc->sc_intmask |= IM_ALLOC_INT; smc91cxx_intr_mask_write(bst, bsh, sc->sc_intmask); ifp->if_timer = 5; ifp->if_flags |= IFF_OACTIVE; return; } /* * We have a packet number - set the data window. */ bus_space_write_2(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_2(bst, bsh, DATA_REG_W, (length + 6) & 0x7ff); /* * 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. The copying function only does * whole words and returns the straggling byte (if any). */ oddbyte = smc91cxx_copy_tx_frame(sc, m); #ifdef SMC91CXX_SW_PAD if (pad > 1 && (pad & 1)) { bus_space_write_2(bst, bsh, DATA_REG_W, oddbyte); oddbyte = 0; pad -= 1; } /* * Push out padding. */ while (pad > 1) { bus_space_write_2(bst, bsh, DATA_REG_W, 0); pad -= 2; } #endif /* * Push out control byte and unused packet byte. The control byte * denotes whether this is an odd or even length packet, and that * no special CRC handling is necessary. */ bus_space_write_2(bst, bsh, DATA_REG_W, oddbyte | ((length & 1) ? (CTLB_ODD << 8) : 0)); /* * Enable transmit interrupts and let the chip go. Set a watchdog * in case we miss the interrupt. */ sc->sc_intmask |= IM_TX_INT | IM_TX_EMPTY_INT; smc91cxx_intr_mask_write(bst, bsh, sc->sc_intmask); bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ENQUEUE); ifp->if_timer = 5; /* Hand off a copy to the bpf. */ bpf_mtap(ifp, m); ifp->if_opackets++; m_freem(m); readcheck: /* * Check for incoming packets. 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; } /* * Squirt a (possibly misaligned) mbuf to the device */ uint8_t smc91cxx_copy_tx_frame(struct smc91cxx_softc *sc, struct mbuf *m0) { bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; struct mbuf *m; int len, leftover; u_int16_t dbuf; u_int8_t *p; #ifdef DIAGNOSTIC u_int8_t *lim; #endif /* start out with no leftover data */ leftover = 0; dbuf = 0; /* Process the chain of mbufs */ for (m = m0; m != NULL; m = m->m_next) { /* * Process all of the data in a single mbuf. */ p = mtod(m, u_int8_t *); len = m->m_len; #ifdef DIAGNOSTIC lim = p + len; #endif while (len > 0) { if (leftover) { /* * Data left over (from mbuf or realignment). * Buffer the next byte, and write it and * the leftover data out. */ dbuf |= *p++ << 8; len--; bus_space_write_2(bst, bsh, DATA_REG_W, dbuf); leftover = 0; } else if ((long) p & 1) { /* * Misaligned data. Buffer the next byte. */ dbuf = *p++; len--; leftover = 1; } else { /* * Aligned data. This is the case we like. * * Write-region out as much as we can, then * buffer the remaining byte (if any). */ leftover = len & 1; len &= ~1; bus_space_write_multi_stream_2(bst, bsh, DATA_REG_W, (u_int16_t *)p, len >> 1); p += len; if (leftover) dbuf = *p++; len = 0; } } if (len < 0) panic("smc91cxx_copy_tx_frame: negative len"); #ifdef DIAGNOSTIC if (p != lim) panic("smc91cxx_copy_tx_frame: p != lim"); #endif } return dbuf; } /* * Interrupt service routine. */ int smc91cxx_intr(void *arg) { struct smc91cxx_softc *sc = arg; struct ifnet *ifp = &sc->sc_ec.ec_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; u_int16_t v; if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0 || !device_is_active(sc->sc_dev)) return (0); SMC_SELECT_BANK(sc, 2); /* * Obtain the current interrupt status and mask. */ v = bus_space_read_2(bst, bsh, INTR_STAT_REG_B); /* * Get the set of interrupt which occurred and eliminate any * which are not enabled. */ mask = v >> 8; interrupts = v & 0xff; KDASSERT(mask == sc->sc_intmask); status = interrupts & mask; /* Ours? */ if (status == 0) return (0); /* * It's ours; disable all interrupts while we process them. */ smc91cxx_intr_mask_write(bst, bsh, 0); /* * Receive overrun interrupts. */ if (status & IM_RX_OVRN_INT) { smc91cxx_intr_ack_write(bst, bsh, IM_RX_OVRN_INT, 0); ifp->if_ierrors++; } /* * Receive interrupts. */ if (status & IM_RCV_INT) { smc91cxx_read(sc); } /* * Memory allocation interrupts. */ if (status & IM_ALLOC_INT) { /* Disable this interrupt. */ mask &= ~IM_ALLOC_INT; sc->sc_intmask &= ~IM_ALLOC_INT; /* * Save allocated packet number for use in start */ packetno = bus_space_read_1(bst, bsh, ALLOC_RESULT_REG_B); KASSERT(sc->sc_txpacketno & ARR_FAILED); sc->sc_txpacketno = packetno; /* * We can transmit again! */ 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) { smc91cxx_intr_ack_write(bst, bsh, IM_TX_INT, 0); 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_2(bst, bsh, PACKET_NUM_REG_B, packetno); /* * Position the pointer to the beginning of the packet, wait * for preload. */ bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_AUTOINC | PTR_READ /* | 0x0000 */); delay(1); /* * 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) { static struct timeval txsuc_last; static int txsuc_count; if (ppsratecheck(&txsuc_last, &txsuc_count, 1)) printf("%s: successful packet caused TX" " interrupt?!\n", device_xname(sc->sc_dev)); } else ifp->if_oerrors++; if (tx_status & EPHSR_LATCOL) ifp->if_collisions++; /* Disable this interrupt (start will reenable if needed). */ mask &= ~IM_TX_INT; sc->sc_intmask &= ~IM_TX_INT; /* * 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) { smc91cxx_intr_ack_write(bst, bsh, IM_TX_EMPTY_INT, 0); /* Disable this interrupt. */ mask &= ~IM_TX_EMPTY_INT; sc->sc_intmask &= ~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; } /* * Internal PHY status change */ if (sc->sc_chipid == CHIP_91C111 && sc->sc_internal_phy && (status & IM_MD_INT)) { /* * Internal PHY status change */ smc91cxx_intr_ack_write(bst, bsh, IM_MD_INT, 0); mii_pollstat(&sc->sc_mii); } /* * 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); /* * Reenable the interrupts we wish to receive now that processing * is complete. */ mask |= sc->sc_intmask; smc91cxx_intr_mask_write(bst, bsh, mask); if (status) rnd_add_uint32(&sc->rnd_source, status); 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(struct smc91cxx_softc *sc) { struct ifnet *ifp = &sc->sc_ec.ec_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; struct ether_header *eh; struct mbuf *m; u_int16_t status, packetno, packetlen; u_int8_t *data; u_int32_t dr; bool first = true; 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. */ packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W); if (packetno & FIFO_REMPTY) { if (first) { aprint_error_dev(sc->sc_dev, "receive interrupt on empty fifo\n"); } return; } first = false; bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC /* | 0x0000 */); delay(1); /* * First two words are status and packet length. */ dr = bus_space_read_4(bst, bsh, DATA_REG_W); status = (u_int16_t)dr; packetlen = (u_int16_t)(dr >> 16); packetlen &= RLEN_MASK; if (packetlen < ETHER_MIN_LEN - ETHER_CRC_LEN + 6 || packetlen > 1534) { ifp->if_ierrors++; goto out; } /* * 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++; aprint_error_dev(sc->sc_dev, "can't allocate cluster for incoming packet\n"); goto out; } /* * Pull the packet off the interface. Make sure the payload * is aligned. */ if ((sc->sc_flags & SMC_FLAGS_32BIT_READ) == 0) { m->m_data = (char *) ALIGN(mtod(m, char *) + sizeof(struct ether_header)) - sizeof(struct ether_header); eh = mtod(m, struct ether_header *); data = mtod(m, u_int8_t *); KASSERT(trunc_page((uintptr_t)data) == trunc_page((uintptr_t)data + packetlen - 1)); 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); } } else { m->m_data = (void *) ALIGN(mtod(m, void *)); eh = mtod(m, struct ether_header *); data = mtod(m, u_int8_t *); KASSERT(trunc_page((uintptr_t)data) == trunc_page((uintptr_t)data + packetlen - 1)); if (packetlen > 3) bus_space_read_multi_stream_4(bst, bsh, DATA_REG_W, (u_int32_t *)data, packetlen >> 2); if (packetlen & 3) { data += packetlen & ~3; *((u_int32_t *)data) = bus_space_read_stream_4(bst, bsh, DATA_REG_W); } } ifp->if_ipackets++; /* * Make sure to behave as IFF_SIMPLEX in all cases. * This is to cope with SMC91C92 (Megahertz XJ10BT), which * loops back packets to itself on promiscuous mode. * (should be ensured by chipset configuration) */ if ((ifp->if_flags & IFF_PROMISC) != 0) { /* * Drop packet looped back from myself. */ if (ether_cmp(eh->ether_shost, CLLADDR(ifp->if_sadl)) == 0) { m_freem(m); goto out; } } m->m_pkthdr.len = m->m_len = packetlen; /* * Hand the packet off to bpf listeners. */ bpf_mtap(ifp, m); (*ifp->if_input)(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. */ goto again; } /* * Process an ioctl request. */ int smc91cxx_ioctl(struct ifnet *ifp, u_long cmd, void *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 SIOCINITIFADDR: if ((error = smc91cxx_enable(sc)) != 0) break; ifp->if_flags |= IFF_UP; smc91cxx_init(sc); switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: arp_ifinit(ifp, ifa); break; #endif default: break; } break; case SIOCSIFFLAGS: if ((error = ifioctl_common(ifp, cmd, data)) != 0) break; /* XXX re-use ether_ioctl() */ switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { case IFF_RUNNING: /* * If interface is marked down and it is running, * stop it. */ smc91cxx_stop(sc); ifp->if_flags &= ~IFF_RUNNING; smc91cxx_disable(sc); break; case IFF_UP: /* * If interface is marked up and it is stopped, * start it. */ if ((error = smc91cxx_enable(sc)) != 0) break; smc91cxx_init(sc); break; case IFF_UP|IFF_RUNNING: /* * Reset the interface to pick up changes in any * other flags that affect hardware registers. */ smc91cxx_reset(sc); break; case 0: break; } break; case SIOCADDMULTI: case SIOCDELMULTI: if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0) { error = EIO; break; } if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { /* * Multicast list has changed; set the hardware * filter accordingly. */ if (ifp->if_flags & IFF_RUNNING) smc91cxx_reset(sc); error = 0; } break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd); break; default: error = ether_ioctl(ifp, cmd, data); break; } splx(s); return (error); } /* * Reset the interface. */ void smc91cxx_reset(struct smc91cxx_softc *sc) { int s; s = splnet(); smc91cxx_stop(sc); smc91cxx_init(sc); splx(s); } /* * Watchdog timer. */ void smc91cxx_watchdog(struct ifnet *ifp) { struct smc91cxx_softc *sc = ifp->if_softc; log(LOG_ERR, "%s: device timeout\n", device_xname(sc->sc_dev)); ifp->if_oerrors++; smc91cxx_reset(sc); } /* * Stop output on the interface. */ void smc91cxx_stop(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); smc91cxx_intr_mask_write(bst, bsh, 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_ec.ec_if.if_timer = 0; } /* * Enable power on the interface. */ int smc91cxx_enable(struct smc91cxx_softc *sc) { if ((sc->sc_flags & SMC_FLAGS_ENABLED) == 0 && sc->sc_enable != NULL) { if ((*sc->sc_enable)(sc) != 0) { aprint_error_dev(sc->sc_dev, "device enable failed\n"); return (EIO); } } sc->sc_flags |= SMC_FLAGS_ENABLED; return (0); } /* * Disable power on the interface. */ void smc91cxx_disable(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(device_t self, enum devact act) { struct smc91cxx_softc *sc = device_private(self); switch (act) { case DVACT_DEACTIVATE: if_deactivate(&sc->sc_ec.ec_if); return 0; default: return EOPNOTSUPP; } } int smc91cxx_detach(device_t self, int flags) { struct smc91cxx_softc *sc = device_private(self); struct ifnet *ifp = &sc->sc_ec.ec_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); rnd_detach_source(&sc->rnd_source); ether_ifdetach(ifp); if_detach(ifp); return (0); } u_int32_t smc91cxx_mii_bitbang_read(device_t self) { struct smc91cxx_softc *sc = device_private(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(device_t self, u_int32_t val) { struct smc91cxx_softc *sc = device_private(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(device_t self, int phy, int reg) { struct smc91cxx_softc *sc = device_private(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(device_t self, int phy, int reg, int val) { struct smc91cxx_softc *sc = device_private(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(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; 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(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 (!device_is_active(sc->sc_dev)) return; s = splnet(); mii_tick(&sc->sc_mii); splx(s); callout_reset(&sc->sc_mii_callout, hz, smc91cxx_tick, sc); }