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Diffstat (limited to 'sys/dev/xe/if_xe.c')
| -rw-r--r-- | sys/dev/xe/if_xe.c | 1932 |
1 files changed, 1932 insertions, 0 deletions
diff --git a/sys/dev/xe/if_xe.c b/sys/dev/xe/if_xe.c new file mode 100644 index 0000000..4599c4f --- /dev/null +++ b/sys/dev/xe/if_xe.c @@ -0,0 +1,1932 @@ +/*- + * Copyright (c) 1998, 1999 Scott Mitchell + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + * $Id: if_xe.c,v 1.20 1999/06/13 19:17:40 scott Exp $ + * $FreeBSD$ + */ + +/* + * XXX TODO XXX + * + * I've pushed this fairly far, but there are some things that need to be + * done here. I'm documenting them here in case I get destracted. -- imp + * + * xe_cem56fix -- need to figure out how to map the extra stuff. + */ + +/* + * Portions of this software were derived from Werner Koch's xirc2ps driver + * for Linux under the terms of the following license (from v1.30 of the + * xirc2ps driver): + * + * Copyright (c) 1997 by Werner Koch (dd9jn) + * + * 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, and the entire permission notice in its entirety, + * including the disclaimer of warranties. + * 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. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED ``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. + */ + +/* + * FreeBSD device driver for Xircom CreditCard PCMCIA Ethernet adapters. The + * following cards are currently known to work with the driver: + * Xircom CreditCard 10/100 (CE3) + * Xircom CreditCard Ethernet + Modem 28 (CEM28) + * Xircom CreditCard Ethernet 10/100 + Modem 56 (CEM56) + * Xircom RealPort Ethernet 10 + * Xircom RealPort Ethernet 10/100 + * Xircom RealPort Ethernet 10/100 + Modem 56 (REM56, REM56G) + * Intel EtherExpress Pro/100 PC Card Mobile Adapter 16 (Pro/100 M16A) + * Compaq Netelligent 10/100 PC Card (CPQ-10/100) + * + * Some other cards *should* work, but support for them is either broken or in + * an unknown state at the moment. I'm always interested in hearing from + * people who own any of these cards: + * Xircom CreditCard 10Base-T (PS-CE2-10) + * Xircom CreditCard Ethernet + ModemII (CEM2) + * Xircom CEM28 and CEM33 Ethernet/Modem cards (may be variants of CEM2?) + * + * Thanks to all who assisted with the development and testing of the driver, + * especially: Werner Koch, Duke Kamstra, Duncan Barclay, Jason George, Dru + * Nelson, Mike Kephart, Bill Rainey and Douglas Rand. Apologies if I've left + * out anyone who deserves a mention here. + * + * Special thanks to Ade Lovett for both hosting the mailing list and doing + * the CEM56/REM56 support code; and the FreeBSD UK Users' Group for hosting + * the web pages. + * + * Contact points: + * + * Driver web page: http://ukug.uk.freebsd.org/~scott/xe_drv/ + * + * Mailing list: http://www.lovett.com/lists/freebsd-xircom/ + * or send "subscribe freebsd-xircom" to <majordomo@lovett.com> + * + * Author email: <scott@uk.freebsd.org> + */ + + +#include <sys/param.h> +#include <sys/cdefs.h> +#include <sys/errno.h> +#include <sys/kernel.h> +#include <sys/mbuf.h> +#include <sys/socket.h> +#include <sys/sockio.h> +#include <sys/systm.h> +#include <sys/uio.h> + +#include <sys/module.h> +#include <sys/bus.h> + +#include <machine/bus.h> +#include <machine/resource.h> +#include <sys/rman.h> + +#include <net/ethernet.h> +#include <net/if.h> +#include <net/if_arp.h> +#include <net/if_dl.h> +#include <net/if_media.h> +#include <net/if_mib.h> +#include <net/bpf.h> + +#include <dev/xe/if_xereg.h> +#include <dev/xe/if_xevar.h> + +/* + * MII command structure + */ +struct xe_mii_frame { + u_int8_t mii_stdelim; + u_int8_t mii_opcode; + u_int8_t mii_phyaddr; + u_int8_t mii_regaddr; + u_int8_t mii_turnaround; + u_int16_t mii_data; +}; + +/* + * Media autonegotiation progress constants + */ +#define XE_AUTONEG_NONE 0 /* No autonegotiation in progress */ +#define XE_AUTONEG_WAITING 1 /* Waiting for transmitter to go idle */ +#define XE_AUTONEG_STARTED 2 /* Waiting for autonegotiation to complete */ +#define XE_AUTONEG_100TX 3 /* Trying to force 100baseTX link */ +#define XE_AUTONEG_FAIL 4 /* Autonegotiation failed */ + + +/* + * Prototypes start here + */ +static void xe_init (void *xscp); +static void xe_start (struct ifnet *ifp); +static int xe_ioctl (struct ifnet *ifp, u_long command, caddr_t data); +static void xe_watchdog (struct ifnet *ifp); +static int xe_media_change (struct ifnet *ifp); +static void xe_media_status (struct ifnet *ifp, struct ifmediareq *mrp); +static timeout_t xe_setmedia; +static void xe_hard_reset (struct xe_softc *scp); +static void xe_soft_reset (struct xe_softc *scp); +static void xe_stop (struct xe_softc *scp); +static void xe_enable_intr (struct xe_softc *scp); +static void xe_disable_intr (struct xe_softc *scp); +static void xe_setmulti (struct xe_softc *scp); +static void xe_setaddrs (struct xe_softc *scp); +static int xe_pio_write_packet (struct xe_softc *scp, struct mbuf *mbp); +static u_int32_t xe_compute_crc (u_int8_t *data, int len) __unused; +static int xe_compute_hashbit (u_int32_t crc) __unused; + +/* + * MII functions + */ +static void xe_mii_sync (struct xe_softc *scp); +static int xe_mii_init (struct xe_softc *scp); +static void xe_mii_send (struct xe_softc *scp, u_int32_t bits, int cnt); +static int xe_mii_readreg (struct xe_softc *scp, struct xe_mii_frame *frame); +static int xe_mii_writereg (struct xe_softc *scp, struct xe_mii_frame *frame); +static u_int16_t xe_phy_readreg (struct xe_softc *scp, u_int16_t reg); +static void xe_phy_writereg (struct xe_softc *scp, u_int16_t reg, u_int16_t data); + +/* + * Debug functions -- uncomment for VERY verbose dignostic information. + * Set to 1 for less verbose information + */ +/* #define XE_DEBUG 2 */ +#ifdef XE_DEBUG +#define XE_REG_DUMP(scp) xe_reg_dump((scp)) +#define XE_MII_DUMP(scp) xe_mii_dump((scp)) +static void xe_reg_dump (struct xe_softc *scp); +static void xe_mii_dump (struct xe_softc *scp); +#else +#define XE_REG_DUMP(scp) +#define XE_MII_DUMP(scp) +#endif + +/* + * Attach a device. + */ +int +xe_attach (device_t dev) +{ + struct xe_softc *scp = device_get_softc(dev); + +#ifdef XE_DEBUG + device_printf(dev, "attach\n"); +#endif + + /* Fill in some private data */ + scp->ifp = &scp->arpcom.ac_if; + scp->ifm = &scp->ifmedia; + scp->autoneg_status = 0; + + /* Hopefully safe to read this here */ + XE_SELECT_PAGE(4); + scp->version = XE_INB(XE_BOV); + + scp->dev = dev; + /* Initialise the ifnet structure */ + if (!scp->ifp->if_name) { + scp->ifp->if_softc = scp; + scp->ifp->if_name = "xe"; + scp->ifp->if_unit = device_get_unit(dev); + scp->ifp->if_timer = 0; + scp->ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); + scp->ifp->if_linkmib = &scp->mibdata; + scp->ifp->if_linkmiblen = sizeof scp->mibdata; + scp->ifp->if_output = ether_output; + scp->ifp->if_start = xe_start; + scp->ifp->if_ioctl = xe_ioctl; + scp->ifp->if_watchdog = xe_watchdog; + scp->ifp->if_init = xe_init; + scp->ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; + } + + /* Initialise the ifmedia structure */ + ifmedia_init(scp->ifm, 0, xe_media_change, xe_media_status); + callout_handle_init(&scp->chand); + + /* + * Fill in supported media types. Some cards _do_ support full duplex + * operation, but this driver doesn't, yet. Therefore we leave those modes + * out of the list. We support some form of autoselection in all cases. + */ + if (scp->mohawk) { + ifmedia_add(scp->ifm, IFM_ETHER|IFM_100_TX, 0, NULL); + ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T, 0, NULL); + } + else { + ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T, 0, NULL); + ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_2, 0, NULL); + } + ifmedia_add(scp->ifm, IFM_ETHER|IFM_AUTO, 0, NULL); + + /* Default is to autoselect best supported media type */ + ifmedia_set(scp->ifm, IFM_ETHER|IFM_AUTO); + + /* Print some useful information */ + device_printf(dev, "%s %s, bonding version %#x%s%s\n", + scp->vendor, + scp->card_type, + scp->version, + scp->mohawk ? ", 100Mbps capable" : "", + scp->modem ? ", with modem" : ""); + if (scp->mohawk) { + XE_SELECT_PAGE(0x10); + device_printf(dev, "DingoID = %#x, RevisionID = %#x, VendorID = %#x\n", + XE_INW(XE_DINGOID), + XE_INW(XE_RevID), + XE_INW(XE_VendorID)); + } + if (scp->ce2) { + XE_SELECT_PAGE(0x45); + device_printf(dev, "CE2 version = %#x\n", XE_INB(XE_REV)); + } + + /* Print MAC address */ + device_printf(dev, "Ethernet address %6D\n", scp->arpcom.ac_enaddr, ":"); + + /* Attach the interface */ + ether_ifattach(scp->ifp, scp->arpcom.ac_enaddr); + + /* Done */ + return 0; +} + + +/* + * Initialize device. Completes the reset procedure on the card and starts + * output. If there's an autonegotiation in progress we DON'T do anything; + * the media selection code will call us again when it's done. + */ +static void +xe_init(void *xscp) { + struct xe_softc *scp = xscp; + int s; + +#ifdef XE_DEBUG + device_printf(scp->dev, "init\n"); +#endif + + if (TAILQ_EMPTY(&scp->ifp->if_addrhead)) return; + + /* Reset transmitter flags */ + scp->tx_queued = 0; + scp->tx_tpr = 0; + scp->tx_collisions = 0; + scp->ifp->if_timer = 0; + + s = splimp(); + + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC0, 0x20); /* Disable source insertion (WTF is that?) */ + + /* + * Set the 'local memory dividing line' -- splits the 32K card memory into + * 8K for transmit buffers and 24K for receive. This is done automatically + * on newer revision cards. + */ + if (scp->srev != 1) { + XE_SELECT_PAGE(2); + XE_OUTW(XE_RBS, 0x2000); + } + + /* Set up multicast addresses */ + xe_setmulti(scp); + + /* Fix the data offset register -- reset leaves it off-by-one */ + XE_SELECT_PAGE(0); + XE_OUTW(XE_DO, 0x2000); + + /* + * Set MAC interrupt masks and clear status regs. The bit names are direct + * from the Linux code; I have no idea what most of them do. + */ + XE_SELECT_PAGE(0x40); /* Bit 7..0 */ + XE_OUTB(XE_RX0Msk, 0xff); /* ROK, RAB, rsv, RO, CRC, AE, PTL, MP */ + XE_OUTB(XE_TX0Msk, 0xff); /* TOK, TAB, SQE, LL, TU, JAB, EXC, CRS */ + XE_OUTB(XE_TX0Msk+1, 0xb0); /* rsv, rsv, PTD, EXT, rsv, rsv, rsv, rsv */ + XE_OUTB(XE_RST0, 0x00); /* ROK, RAB, REN, RO, CRC, AE, PTL, MP */ + XE_OUTB(XE_TXST0, 0x00); /* TOK, TAB, SQE, LL, TU, JAB, EXC, CRS */ + XE_OUTB(XE_TXST1, 0x00); /* TEN, rsv, PTD, EXT, retry_counter:4 */ + + /* + * Check for an in-progress autonegotiation. If one is active, just set + * IFF_RUNNING and return. The media selection code will call us again when + * it's done. + */ + if (scp->autoneg_status) { + scp->ifp->if_flags |= IFF_RUNNING; + } + else { + /* Enable receiver, put MAC online */ + XE_SELECT_PAGE(0x40); + XE_OUTB(XE_CMD0, XE_CMD0_RX_ENABLE|XE_CMD0_ONLINE); + + /* Set up IMR, enable interrupts */ + xe_enable_intr(scp); + + /* Attempt to start output */ + scp->ifp->if_flags |= IFF_RUNNING; + scp->ifp->if_flags &= ~IFF_OACTIVE; + xe_start(scp->ifp); + } + + (void)splx(s); +} + + +/* + * Start output on interface. We make two assumptions here: + * 1) that the current priority is set to splimp _before_ this code + * is called *and* is returned to the appropriate priority after + * return + * 2) that the IFF_OACTIVE flag is checked before this code is called + * (i.e. that the output part of the interface is idle) + */ +static void +xe_start(struct ifnet *ifp) { + struct xe_softc *scp = ifp->if_softc; + struct mbuf *mbp; + + /* + * Loop while there are packets to be sent, and space to send them. + */ + while (1) { + IF_DEQUEUE(&ifp->if_snd, mbp); /* Suck a packet off the send queue */ + + if (mbp == NULL) { + /* + * We are using the !OACTIVE flag to indicate to the outside world that + * we can accept an additional packet rather than that the transmitter + * is _actually_ active. Indeed, the transmitter may be active, but if + * we haven't filled all the buffers with data then we still want to + * accept more. + */ + ifp->if_flags &= ~IFF_OACTIVE; + return; + } + + if (xe_pio_write_packet(scp, mbp) != 0) { + IF_PREPEND(&ifp->if_snd, mbp); /* Push the packet back onto the queue */ + ifp->if_flags |= IFF_OACTIVE; + return; + } + + /* Tap off here if there is a bpf listener */ + BPF_MTAP(ifp, mbp); + + ifp->if_timer = 5; /* In case we don't hear from the card again */ + scp->tx_queued++; + + m_freem(mbp); + } +} + + +/* + * Process an ioctl request. Adapted from the ed driver. + */ +static int +xe_ioctl (register struct ifnet *ifp, u_long command, caddr_t data) { + struct xe_softc *scp; + int s, error; + + scp = ifp->if_softc; + error = 0; + + s = splimp(); + + switch (command) { + + case SIOCSIFFLAGS: + /* + * If the interface is marked up and stopped, then start it. If it is + * marked down and running, then stop it. + */ + if (ifp->if_flags & IFF_UP) { + if (!(ifp->if_flags & IFF_RUNNING)) { + xe_hard_reset(scp); + xe_setmedia(scp); + xe_init(scp); + } + } + else { + if (ifp->if_flags & IFF_RUNNING) + xe_stop(scp); + } + /* XXX: intentional fall-through ? */ + case SIOCADDMULTI: + case SIOCDELMULTI: + /* + * Multicast list has (maybe) changed; set the hardware filter + * accordingly. This also serves to deal with promiscuous mode if we have + * a BPF listener active. + */ + xe_setmulti(scp); + error = 0; + break; + + case SIOCSIFMEDIA: + case SIOCGIFMEDIA: + /* + * Someone wants to get/set media options. + */ + error = ifmedia_ioctl(ifp, (struct ifreq *)data, &scp->ifmedia, command); + break; + + default: + error = ether_ioctl(ifp, command, data); + } + + (void)splx(s); + + return error; +} + + +/* + * Card interrupt handler. + * + * This function is probably more complicated than it needs to be, as it + * attempts to deal with the case where multiple packets get sent between + * interrupts. This is especially annoying when working out the collision + * stats. Not sure whether this case ever really happens or not (maybe on a + * slow/heavily loaded machine?) so it's probably best to leave this like it + * is. + * + * Note that the crappy PIO used to get packets on and off the card means that + * you will spend a lot of time in this routine -- I can get my P150 to spend + * 90% of its time servicing interrupts if I really hammer the network. Could + * fix this, but then you'd start dropping/losing packets. The moral of this + * story? If you want good network performance _and_ some cycles left over to + * get your work done, don't buy a Xircom card. Or convince them to tell me + * how to do memory-mapped I/O :) + */ +static void +xe_intr(void *xscp) +{ + struct xe_softc *scp = (struct xe_softc *) xscp; + struct ifnet *ifp; + u_int16_t rx_bytes, rxs, txs; + u_int8_t psr, isr, esr, rsr; + + ifp = &scp->arpcom.ac_if; + rx_bytes = 0; /* Bytes received on this interrupt */ + + if (scp->mohawk) { + XE_OUTB(XE_CR, 0); /* Disable interrupts */ + } + + psr = XE_INB(XE_PR); /* Stash the current register page */ + + /* + * Read ISR to see what caused this interrupt. Note that this clears the + * ISR on CE2 type cards. + */ + if ((isr = XE_INB(XE_ISR)) && isr != 0xff) { + + esr = XE_INB(XE_ESR); /* Read the other status registers */ + XE_SELECT_PAGE(0x40); + rxs = XE_INB(XE_RST0); + XE_OUTB(XE_RST0, ~rxs & 0xff); + txs = XE_INB(XE_TXST0); + txs |= XE_INB(XE_TXST1) << 8; + XE_OUTB(XE_TXST0, 0); + XE_OUTB(XE_TXST1, 0); + XE_SELECT_PAGE(0); + +#if XE_DEBUG > 2 + printf("xe%d: ISR=%#2.2x ESR=%#2.2x RST=%#2.2x TXST=%#4.4x\n", unit, isr, esr, rxs, txs); +#endif + + /* + * Handle transmit interrupts + */ + if (isr & XE_ISR_TX_PACKET) { + u_int8_t new_tpr, sent; + + if ((new_tpr = XE_INB(XE_TPR)) < scp->tx_tpr) /* Update packet count */ + sent = (0xff - scp->tx_tpr) + new_tpr; /* TPR rolled over */ + else + sent = new_tpr - scp->tx_tpr; + + if (sent > 0) { /* Packets sent since last interrupt */ + scp->tx_tpr = new_tpr; + scp->tx_queued -= sent; + ifp->if_opackets += sent; + ifp->if_collisions += scp->tx_collisions; + + /* + * Collision stats are a PITA. If multiples frames have been sent, we + * distribute any outstanding collision count equally amongst them. + * However, if we're missing interrupts we're quite likely to also + * miss some collisions; thus the total count will be off anyway. + * Likewise, if we miss a frame dropped due to excessive collisions + * any outstanding collisions count will be held against the next + * frame to be successfully sent. Hopefully it averages out in the + * end! + * XXX - This will screw up if tx_collisions/sent > 14. FIX IT! + */ + switch (scp->tx_collisions) { + case 0: + break; + case 1: + scp->mibdata.dot3StatsSingleCollisionFrames++; + scp->mibdata.dot3StatsCollFrequencies[0]++; + break; + default: + if (sent == 1) { + scp->mibdata.dot3StatsMultipleCollisionFrames++; + scp->mibdata.dot3StatsCollFrequencies[scp->tx_collisions-1]++; + } + else { /* Distribute across multiple frames */ + scp->mibdata.dot3StatsMultipleCollisionFrames += sent; + scp->mibdata. + dot3StatsCollFrequencies[scp->tx_collisions/sent] += sent - scp->tx_collisions%sent; + scp->mibdata. + dot3StatsCollFrequencies[scp->tx_collisions/sent + 1] += scp->tx_collisions%sent; + } + } + scp->tx_collisions = 0; + } + ifp->if_timer = 0; + ifp->if_flags &= ~IFF_OACTIVE; + } + if (txs & 0x0002) { /* Excessive collisions (packet dropped) */ + ifp->if_collisions += 16; + ifp->if_oerrors++; + scp->tx_collisions = 0; + scp->mibdata.dot3StatsExcessiveCollisions++; + scp->mibdata.dot3StatsMultipleCollisionFrames++; + scp->mibdata.dot3StatsCollFrequencies[15]++; + XE_OUTB(XE_CR, XE_CR_RESTART_TX); + } + if (txs & 0x0040) /* Transmit aborted -- probably collisions */ + scp->tx_collisions++; + + + /* + * Handle receive interrupts + */ + while ((esr = XE_INB(XE_ESR)) & XE_ESR_FULL_PACKET_RX) { + + if ((rsr = XE_INB(XE_RSR)) & XE_RSR_RX_OK) { + struct ether_header *ehp; + struct mbuf *mbp; + u_int16_t len; + + len = XE_INW(XE_RBC); + + if (len == 0) + continue; + +#if 0 + /* + * Limit the amount of time we spend in this loop, dropping packets if + * necessary. The Linux code does this with considerably more + * finesse, adjusting the threshold dynamically. + */ + if ((rx_bytes += len) > 22000) { + ifp->if_iqdrops++; + scp->mibData.dot3StatsMissedFrames++; + XE_OUTW(XE_DO, 0x8000); + continue; + } +#endif + + if (len & 0x01) + len++; + + MGETHDR(mbp, M_DONTWAIT, MT_DATA); /* Allocate a header mbuf */ + if (mbp != NULL) { + mbp->m_pkthdr.rcvif = ifp; + mbp->m_pkthdr.len = mbp->m_len = len; + + /* + * If the mbuf header isn't big enough for the packet, attach an + * mbuf cluster to hold it. The +2 is to allow for the nasty little + * alignment hack below. + */ + if (len + 2 > MHLEN) { + MCLGET(mbp, M_DONTWAIT); + if ((mbp->m_flags & M_EXT) == 0) { + m_freem(mbp); + mbp = NULL; + } + } + } + + if (mbp != NULL) { + /* + * The Ethernet header is 14 bytes long; thus the actual packet data + * won't be 32-bit aligned when it's dumped into the mbuf. We + * offset everything by 2 bytes to fix this. Apparently the + * alignment is important for NFS, damn its eyes. + */ + mbp->m_data += 2; + ehp = mtod(mbp, struct ether_header *); + + /* + * Now get the packet, including the Ethernet header and trailer (?) + * We use programmed I/O, because we don't know how to do shared + * memory with these cards. So yes, it's real slow, and heavy on + * the interrupts (CPU on my P150 maxed out at ~950KBps incoming). + */ + if (scp->srev == 0) { /* Workaround a bug in old cards */ + u_short rhs; + + XE_SELECT_PAGE(5); + rhs = XE_INW(XE_RHSA); + XE_SELECT_PAGE(0); + + rhs += 3; /* Skip control info */ + + if (rhs >= 0x8000) + rhs = 0; + + if (rhs + len > 0x8000) { + int i; + + /* + * XXX - This i-- seems very wrong, but it's what the Linux guys + * XXX - do. Need someone with an old CE2 to test this for me. + * XXX - 99/3/28: Changed the first i-- to an i++, maybe that'll + * XXX - fix it? It seems as though the previous version would + * XXX - have caused an infinite loop (what, another one?). + */ + for (i = 0; i < len; i++, rhs++) { + ((char *)ehp)[i] = XE_INB(XE_EDP); + if (rhs == 0x8000) { + rhs = 0; + i--; + } + } + } + else + bus_space_read_multi_2(scp->bst, scp->bsh, XE_EDP, + (u_int16_t *) ehp, len >> 1); + } + else + bus_space_read_multi_2(scp->bst, scp->bsh, XE_EDP, + (u_int16_t *) ehp, len >> 1); + + /* Deliver packet to upper layers */ + if (mbp != NULL) { + mbp->m_flags |= M_HASFCS; /* FCS is included in our + * packet */ + mbp->m_pkthdr.len = mbp->m_len = len; + (*ifp->if_input)(ifp, mbp); /* Send the packet on its way */ + ifp->if_ipackets++; /* Success! */ + } + XE_OUTW(XE_DO, 0x8000); /* skip_rx_packet command */ + } + } + else if (rsr & XE_RSR_LONG_PACKET) { /* Packet length >1518 bytes */ + scp->mibdata.dot3StatsFrameTooLongs++; + ifp->if_ierrors++; + } + else if (rsr & XE_RSR_CRC_ERROR) { /* Bad checksum on packet */ + scp->mibdata.dot3StatsFCSErrors++; + ifp->if_ierrors++; + } + else if (rsr & XE_RSR_ALIGN_ERROR) { /* Packet alignment error */ + scp->mibdata.dot3StatsAlignmentErrors++; + ifp->if_ierrors++; + } + } + if (rxs & 0x10) { /* Receiver overrun */ + scp->mibdata.dot3StatsInternalMacReceiveErrors++; + ifp->if_ierrors++; + XE_OUTB(XE_CR, XE_CR_CLEAR_OVERRUN); + } + } + + XE_SELECT_PAGE(psr); /* Restore saved page */ + XE_OUTB(XE_CR, XE_CR_ENABLE_INTR); /* Re-enable interrupts */ + + /* Could force an int here, instead of dropping packets? */ + /* XE_OUTB(XE_CR, XE_CR_ENABLE_INTR|XE_CE_FORCE_INTR); */ + + return; +} + + +/* + * Device timeout/watchdog routine. Called automatically if we queue a packet + * for transmission but don't get an interrupt within a specified timeout + * (usually 5 seconds). When this happens we assume the worst and reset the + * card. + */ +static void +xe_watchdog(struct ifnet *ifp) { + struct xe_softc *scp = ifp->if_softc; + + device_printf(scp->dev, "watchdog timeout; resetting card\n"); + scp->tx_timeouts++; + ifp->if_oerrors += scp->tx_queued; + xe_stop(scp); + xe_hard_reset(scp); + xe_setmedia(scp); + xe_init(scp); +} + + +/* + * Change media selection. + */ +static int +xe_media_change(struct ifnet *ifp) { + struct xe_softc *scp = ifp->if_softc; + +#ifdef XE_DEBUG + if_printf(ifp, "media_change\n"); +#endif + + if (IFM_TYPE(scp->ifm->ifm_media) != IFM_ETHER) + return(EINVAL); + + /* + * Some card/media combos aren't always possible -- filter those out here. + */ + if ((IFM_SUBTYPE(scp->ifm->ifm_media) == IFM_AUTO || + IFM_SUBTYPE(scp->ifm->ifm_media) == IFM_100_TX) && !scp->phy_ok) + return (EINVAL); + + xe_setmedia(scp); + + return 0; +} + + +/* + * Return current media selection. + */ +static void +xe_media_status(struct ifnet *ifp, struct ifmediareq *mrp) { + +#ifdef XE_DEBUG + if_printf(ifp, "media_status\n"); +#endif + + mrp->ifm_active = ((struct xe_softc *)ifp->if_softc)->media; + + return; +} + + +/* + * Select active media. + */ +static void xe_setmedia(void *xscp) { + struct xe_softc *scp = xscp; + u_int16_t bmcr, bmsr, anar, lpar; + +#ifdef XE_DEBUG + device_printf(scp->dev, "setmedia\n"); +#endif + + /* Cancel any pending timeout */ + untimeout(xe_setmedia, scp, scp->chand); + xe_disable_intr(scp); + + /* Select media */ + scp->media = IFM_ETHER; + switch (IFM_SUBTYPE(scp->ifm->ifm_media)) { + + case IFM_AUTO: /* Autoselect media */ + scp->media = IFM_ETHER|IFM_AUTO; + + /* + * Autoselection is really awful. It goes something like this: + * + * Wait until the transmitter goes idle (2sec timeout). + * Reset card + * IF a 100Mbit PHY exists + * Start NWAY autonegotiation (3.5sec timeout) + * IF that succeeds + * Select 100baseTX or 10baseT, whichever was detected + * ELSE + * Reset card + * IF a 100Mbit PHY exists + * Try to force a 100baseTX link (3sec timeout) + * IF that succeeds + * Select 100baseTX + * ELSE + * Disable the PHY + * ENDIF + * ENDIF + * ENDIF + * ENDIF + * IF nothing selected so far + * IF a 100Mbit PHY exists + * Select 10baseT + * ELSE + * Select 10baseT or 10base2, whichever is connected + * ENDIF + * ENDIF + */ + switch (scp->autoneg_status) { + + case XE_AUTONEG_NONE: +#if XE_DEBUG > 1 + device_printf(scp->dev, "Waiting for idle transmitter\n"); +#endif + scp->arpcom.ac_if.if_flags |= IFF_OACTIVE; + scp->autoneg_status = XE_AUTONEG_WAITING; + scp->chand = timeout(xe_setmedia, scp, hz * 2); + return; + + case XE_AUTONEG_WAITING: + xe_soft_reset(scp); + if (scp->phy_ok) { +#if XE_DEBUG > 1 + device_printf(scp->dev, "Starting autonegotiation\n"); +#endif + bmcr = xe_phy_readreg(scp, PHY_BMCR); + bmcr &= ~(PHY_BMCR_AUTONEGENBL); + xe_phy_writereg(scp, PHY_BMCR, bmcr); + anar = xe_phy_readreg(scp, PHY_ANAR); + anar &= ~(PHY_ANAR_100BT4|PHY_ANAR_100BTXFULL|PHY_ANAR_10BTFULL); + anar |= PHY_ANAR_100BTXHALF|PHY_ANAR_10BTHALF; + xe_phy_writereg(scp, PHY_ANAR, anar); + bmcr |= PHY_BMCR_AUTONEGENBL|PHY_BMCR_AUTONEGRSTR; + xe_phy_writereg(scp, PHY_BMCR, bmcr); + scp->autoneg_status = XE_AUTONEG_STARTED; + scp->chand = timeout(xe_setmedia, scp, hz * 7/2); + return; + } + else { + scp->autoneg_status = XE_AUTONEG_FAIL; + } + break; + + case XE_AUTONEG_STARTED: + bmsr = xe_phy_readreg(scp, PHY_BMSR); + lpar = xe_phy_readreg(scp, PHY_LPAR); + if (bmsr & (PHY_BMSR_AUTONEGCOMP|PHY_BMSR_LINKSTAT)) { +#if XE_DEBUG > 1 + device_printf(scp->dev, "Autonegotiation complete!\n"); +#endif + /* + * XXX - Shouldn't have to do this, but (on my hub at least) the + * XXX - transmitter won't work after a successful autoneg. So we see + * XXX - what the negotiation result was and force that mode. I'm + * XXX - sure there is an easy fix for this. + */ + if (lpar & PHY_LPAR_100BTXHALF) { + xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_SPEEDSEL); + XE_MII_DUMP(scp); + XE_SELECT_PAGE(2); + XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08); + scp->media = IFM_ETHER|IFM_100_TX; + scp->autoneg_status = XE_AUTONEG_NONE; + } + else { + /* + * XXX - Bit of a hack going on in here. + * XXX - This is derived from Ken Hughes patch to the Linux driver + * XXX - to make it work with 10Mbit _autonegotiated_ links on CE3B + * XXX - cards. What's a CE3B and how's it differ from a plain CE3? + * XXX - these are the things we need to find out. + */ + xe_phy_writereg(scp, PHY_BMCR, 0x0000); + XE_SELECT_PAGE(2); + /* BEGIN HACK */ + XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08); + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0x80); + scp->media = IFM_ETHER|IFM_10_T; + scp->autoneg_status = XE_AUTONEG_NONE; + /* END HACK */ + /*XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);*/ /* Disable PHY? */ + /*scp->autoneg_status = XE_AUTONEG_FAIL;*/ + } + } + else { +#if XE_DEBUG > 1 + device_printf(scp->dev, "Autonegotiation failed; trying 100baseTX\n"); +#endif + XE_MII_DUMP(scp); + xe_soft_reset(scp); + if (scp->phy_ok) { + xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_SPEEDSEL); + scp->autoneg_status = XE_AUTONEG_100TX; + scp->chand = timeout(xe_setmedia, scp, hz * 3); + return; + } + else { + scp->autoneg_status = XE_AUTONEG_FAIL; + } + } + break; + + case XE_AUTONEG_100TX: + (void)xe_phy_readreg(scp, PHY_BMSR); + bmsr = xe_phy_readreg(scp, PHY_BMSR); + if (bmsr & PHY_BMSR_LINKSTAT) { +#if XE_DEBUG > 1 + device_printf(scp->dev, "Got 100baseTX link!\n"); +#endif + XE_MII_DUMP(scp); + XE_SELECT_PAGE(2); + XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08); + scp->media = IFM_ETHER|IFM_100_TX; + scp->autoneg_status = XE_AUTONEG_NONE; + } + else { +#if XE_DEBUG > 1 + device_printf(scp->dev, "Autonegotiation failed; disabling PHY\n"); +#endif + XE_MII_DUMP(scp); + xe_phy_writereg(scp, PHY_BMCR, 0x0000); + XE_SELECT_PAGE(2); + XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08); /* Disable PHY? */ + scp->autoneg_status = XE_AUTONEG_FAIL; + } + break; + } + + /* + * If we got down here _and_ autoneg_status is XE_AUTONEG_FAIL, then + * either autonegotiation failed, or never got started to begin with. In + * either case, select a suitable 10Mbit media and hope it works. We + * don't need to reset the card again, since it will have been done + * already by the big switch above. + */ + if (scp->autoneg_status == XE_AUTONEG_FAIL) { +#if XE_DEBUG > 1 + device_printf(scp->dev, "Selecting 10baseX\n"); +#endif + if (scp->mohawk) { + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0x80); + scp->media = IFM_ETHER|IFM_10_T; + scp->autoneg_status = XE_AUTONEG_NONE; + } + else { + XE_SELECT_PAGE(4); + XE_OUTB(XE_GPR0, 4); + DELAY(50000); + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, (XE_INB(XE_ESR) & XE_ESR_MEDIA_SELECT) ? 0x80 : 0xc0); + scp->media = IFM_ETHER|((XE_INB(XE_ESR) & XE_ESR_MEDIA_SELECT) ? IFM_10_T : IFM_10_2); + scp->autoneg_status = XE_AUTONEG_NONE; + } + } + break; + + + /* + * If a specific media has been requested, we just reset the card and + * select it (one small exception -- if 100baseTX is requested by there is + * no PHY, we fall back to 10baseT operation). + */ + case IFM_100_TX: /* Force 100baseTX */ + xe_soft_reset(scp); + if (scp->phy_ok) { +#if XE_DEBUG > 1 + device_printf(scp->dev, "Selecting 100baseTX\n"); +#endif + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0); + xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_SPEEDSEL); + XE_SELECT_PAGE(2); + XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08); + scp->media |= IFM_100_TX; + break; + } + /* FALLTHROUGH */ + + case IFM_10_T: /* Force 10baseT */ + xe_soft_reset(scp); +#if XE_DEBUG > 1 + device_printf(scp->dev, "Selecting 10baseT\n"); +#endif + if (scp->phy_ok) { + xe_phy_writereg(scp, PHY_BMCR, 0x0000); + XE_SELECT_PAGE(2); + XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08); /* Disable PHY */ + } + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0x80); + scp->media |= IFM_10_T; + break; + + case IFM_10_2: + xe_soft_reset(scp); +#if XE_DEBUG > 1 + device_printf(scp->dev, "Selecting 10base2\n"); +#endif + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0xc0); + scp->media |= IFM_10_2; + break; + } + + + /* + * Finally, the LEDs are set to match whatever media was chosen and the + * transmitter is unblocked. + */ +#if XE_DEBUG > 1 + device_printf(scp->dev, "Setting LEDs\n"); +#endif + XE_SELECT_PAGE(2); + switch (IFM_SUBTYPE(scp->media)) { + case IFM_100_TX: + case IFM_10_T: + XE_OUTB(XE_LED, 0x3b); + if (scp->dingo) + XE_OUTB(0x0b, 0x04); /* 100Mbit LED */ + break; + + case IFM_10_2: + XE_OUTB(XE_LED, 0x3a); + break; + } + + /* Restart output? */ + scp->ifp->if_flags &= ~IFF_OACTIVE; + xe_init(scp); +} + + +/* + * Hard reset (power cycle) the card. + */ +static void +xe_hard_reset(struct xe_softc *scp) { + int s; + +#ifdef XE_DEBUG + device_printf(scp->dev, "hard_reset\n"); +#endif + + s = splimp(); + + /* + * Power cycle the card. + */ + XE_SELECT_PAGE(4); + XE_OUTB(XE_GPR1, 0); /* Power off */ + DELAY(40000); + + if (scp->mohawk) + XE_OUTB(XE_GPR1, 1); /* And back on again */ + else + XE_OUTB(XE_GPR1, 5); /* Also set AIC bit, whatever that is */ + DELAY(40000); + XE_SELECT_PAGE(0); + + (void)splx(s); +} + + +/* + * Soft reset the card. Also makes sure that the ML6692 and 10Mbit controller + * are powered up, sets the silicon revision number in softc, disables + * interrupts and checks for the prescence of a 100Mbit PHY. This should + * leave us in a position where we can access the PHY and do media + * selection. The function imposes a 0.5s delay while the hardware powers up. + */ +static void +xe_soft_reset(struct xe_softc *scp) { + int s; + +#ifdef XE_DEBUG + device_printf(scp->dev, "soft_reset\n"); +#endif + + s = splimp(); + + /* + * Reset the card, (again). + */ + XE_SELECT_PAGE(0); + XE_OUTB(XE_CR, XE_CR_SOFT_RESET); + DELAY(40000); + XE_OUTB(XE_CR, 0); + DELAY(40000); + + if (scp->mohawk) { + /* + * set GP1 and GP2 as outputs (bits 2 & 3) + * set GP1 low to power on the ML6692 (bit 0) + * set GP2 high to power on the 10Mhz chip (bit 1) + */ + XE_SELECT_PAGE(4); + XE_OUTB(XE_GPR0, 0x0e); + } + + /* + * Wait for everything to wake up. + */ + DELAY(500000); + + /* + * Get silicon revision number. + */ + XE_SELECT_PAGE(4); + if (scp->mohawk) + scp->srev = (XE_INB(XE_BOV) & 0x70) >> 4; + else + scp->srev = (XE_INB(XE_BOV) & 0x30) >> 4; +#ifdef XE_DEBUG + device_printf(scp->dev, "silicon revision = %d\n", scp->srev); +#endif + + /* + * Shut off interrupts. + */ + xe_disable_intr(scp); + + /* + * Check for PHY. + */ + if (scp->mohawk) { + scp->phy_ok = xe_mii_init(scp); + } + + XE_SELECT_PAGE(0); + + (void)splx(s); +} + + +/* + * Take interface offline. This is done by powering down the device, which I + * assume means just shutting down the transceiver and Ethernet logic. This + * requires a _hard_ reset to recover from, as we need to power up again. + */ +static void +xe_stop(struct xe_softc *scp) { + int s; + +#ifdef XE_DEBUG + device_printf(scp->dev, "stop\n"); +#endif + + s = splimp(); + + /* + * Shut off interrupts. + */ + xe_disable_intr(scp); + + /* + * Power down. + */ + XE_SELECT_PAGE(4); + XE_OUTB(XE_GPR1, 0); + XE_SELECT_PAGE(0); + + /* + * ~IFF_RUNNING == interface down. + */ + scp->ifp->if_flags &= ~IFF_RUNNING; + scp->ifp->if_flags &= ~IFF_OACTIVE; + scp->ifp->if_timer = 0; + + (void)splx(s); +} + + +/* + * Enable Ethernet interrupts from the card. + */ +static void +xe_enable_intr(struct xe_softc *scp) { +#ifdef XE_DEBUG + device_printf(scp->dev, "enable_intr\n"); +#endif + + XE_SELECT_PAGE(1); + XE_OUTB(XE_IMR0, 0xff); /* Unmask everything */ + XE_OUTB(XE_IMR1, 0x01); /* Unmask TX underrun detection */ + DELAY(1); + + XE_SELECT_PAGE(0); + XE_OUTB(XE_CR, XE_CR_ENABLE_INTR); /* Enable interrupts */ + if (scp->modem && !scp->dingo) { /* This bit is just magic */ + if (!(XE_INB(0x10) & 0x01)) { + XE_OUTB(0x10, 0x11); /* Unmask master int enable bit */ + } + } +} + + +/* + * Disable all Ethernet interrupts from the card. + */ +static void +xe_disable_intr(struct xe_softc *scp) { +#ifdef XE_DEBUG + device_printf(scp->dev, "disable_intr\n"); +#endif + + XE_SELECT_PAGE(0); + XE_OUTB(XE_CR, 0); /* Disable interrupts */ + if (scp->modem && !scp->dingo) { /* More magic (does this work?) */ + XE_OUTB(0x10, 0x10); /* Mask the master int enable bit */ + } + + XE_SELECT_PAGE(1); + XE_OUTB(XE_IMR0, 0); /* Forbid all interrupts */ + XE_OUTB(XE_IMR1, 0); + XE_SELECT_PAGE(0); +} + + +/* + * Set up multicast filter and promiscuous mode + */ +static void +xe_setmulti(struct xe_softc *scp) { + struct ifnet *ifp; + struct ifmultiaddr *maddr; + int count; + + ifp = &scp->arpcom.ac_if; + maddr = TAILQ_FIRST(&ifp->if_multiaddrs); + + /* Get length of multicast list */ + for (count = 0; maddr != NULL; maddr = TAILQ_NEXT(maddr, ifma_link), count++); + + if ((ifp->if_flags & IFF_PROMISC) || (ifp->if_flags & IFF_ALLMULTI) || (count > 9)) { + /* + * Go into promiscuous mode if either of the PROMISC or ALLMULTI flags are + * set, or if we have been asked to deal with more than 9 multicast + * addresses. To do this: set MPE and PME in SWC1 + */ + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0x06); + } + else if ((ifp->if_flags & IFF_MULTICAST) && (count > 0)) { + /* + * Program the filters for up to 9 addresses + */ + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0x01); + XE_SELECT_PAGE(0x40); + XE_OUTB(XE_CMD0, XE_CMD0_OFFLINE); + /*xe_reg_dump(scp);*/ + xe_setaddrs(scp); + /*xe_reg_dump(scp);*/ + XE_SELECT_PAGE(0x40); + XE_OUTB(XE_CMD0, XE_CMD0_RX_ENABLE|XE_CMD0_ONLINE); + } + else { + /* + * No multicast operation (default) + */ + XE_SELECT_PAGE(0x42); + XE_OUTB(XE_SWC1, 0); + } + XE_SELECT_PAGE(0); +} + + +/* + * Set up all on-chip addresses (for multicast). AFAICS, there are 10 + * of these things; the first is our MAC address, the other 9 are mcast + * addresses, padded with the MAC address if there aren't enough. + * XXX - This doesn't work right, but I'm not sure why yet. We seem to be + * XXX - doing much the same as the Linux code, which is weird enough that + * XXX - it's probably right (despite my earlier comments to the contrary). + */ +static void +xe_setaddrs(struct xe_softc *scp) { + struct ifmultiaddr *maddr; + u_int8_t *addr; + u_int8_t page, slot, byte, i; + + maddr = TAILQ_FIRST(&scp->arpcom.ac_if.if_multiaddrs); + + XE_SELECT_PAGE(page = 0x50); + + for (slot = 0, byte = 8; slot < 10; slot++) { + + if (slot == 0) + addr = (u_int8_t *)(&scp->arpcom.ac_enaddr); + else { + while (maddr != NULL && maddr->ifma_addr->sa_family != AF_LINK) + maddr = TAILQ_NEXT(maddr, ifma_link); + if (maddr != NULL) + addr = LLADDR((struct sockaddr_dl *)maddr->ifma_addr); + else + addr = (u_int8_t *)(&scp->arpcom.ac_enaddr); + } + + for (i = 0; i < 6; i++, byte++) { +#if XE_DEBUG > 2 + if (i) + printf(":%x", addr[i]); + else + device_printf(scp->dev, "individual addresses %d: %x", slot, addr[0]); +#endif + + if (byte > 15) { + page++; + byte = 8; + XE_SELECT_PAGE(page); + } + + if (scp->mohawk) + XE_OUTB(byte, addr[5 - i]); + else + XE_OUTB(byte, addr[i]); + } +#if XE_DEBUG > 2 + printf("\n"); +#endif + } + + XE_SELECT_PAGE(0); +} + + +/* + * Write an outgoing packet to the card using programmed I/O. + */ +static int +xe_pio_write_packet(struct xe_softc *scp, struct mbuf *mbp) { + struct mbuf *mbp2; + u_int16_t len, pad, free; + u_int8_t *data; + u_int8_t savebyte[2], wantbyte; + + /* Get total packet length */ + for (len = 0, mbp2 = mbp; mbp2 != NULL; len += mbp2->m_len, mbp2 = mbp2->m_next); + + /* Packets < minimum length may need to be padded out */ + pad = 0; + if (len < ETHER_MIN_LEN - ETHER_CRC_LEN) { + pad = (ETHER_MIN_LEN - ETHER_CRC_LEN - len + 1) >> 1; + len = ETHER_MIN_LEN - ETHER_CRC_LEN; + } + + /* Check transmit buffer space */ + XE_SELECT_PAGE(0); + XE_OUTW(XE_TRS, len+2); + free = XE_INW(XE_TSO); + free &= 0x7fff; + if (free <= len + 2) + return 1; + + /* Send packet length to card */ + XE_OUTW(XE_EDP, len); + + /* + * Write packet to card using PIO (code stolen from the ed driver) + */ + wantbyte = 0; + while (mbp != NULL) { + len = mbp->m_len; + if (len > 0) { + data = mtod(mbp, caddr_t); + if (wantbyte) { /* Finish the last word */ + savebyte[1] = *data; + XE_OUTW(XE_EDP, *(u_short *)savebyte); + data++; + len--; + wantbyte = 0; + } + if (len > 1) { /* Output contiguous words */ + bus_space_write_multi_2(scp->bst, scp->bsh, XE_EDP, (u_int16_t *) data, + len >> 1); + data += len & ~1; + len &= 1; + } + if (len == 1) { /* Save last byte, if necessary */ + savebyte[0] = *data; + wantbyte = 1; + } + } + mbp = mbp->m_next; + } + if (wantbyte) /* Last byte for odd-length packets */ + XE_OUTW(XE_EDP, *(u_short *)savebyte); + + /* + * For CE3 cards, just tell 'em to send -- apparently the card will pad out + * short packets with random cruft. Otherwise, write nonsense words to fill + * out the packet. I guess it is then sent automatically (?) + */ + if (scp->mohawk) + XE_OUTB(XE_CR, XE_CR_TX_PACKET|XE_CR_ENABLE_INTR); + else + while (pad > 0) { + XE_OUTW(XE_EDP, 0xdead); + pad--; + } + + return 0; +} + +/* + * Compute the 32-bit Ethernet CRC for the given buffer. + */ +static u_int32_t +xe_compute_crc(u_int8_t *data, int len) { + u_int32_t crc = 0xffffffff; + u_int32_t poly = 0x04c11db6; + u_int8_t current, crc31, bit; + int i, k; + + for (i = 0; i < len; i++) { + current = data[i]; + for (k = 1; k <= 8; k++) { + if (crc & 0x80000000) { + crc31 = 0x01; + } + else { + crc31 = 0; + } + bit = crc31 ^ (current & 0x01); + crc <<= 1; + current >>= 1; + if (bit) { + crc = (crc ^ poly)|1; + } + } + } + return crc; +} + + +/* + * Convert a CRC into an index into the multicast hash table. What we do is + * take the most-significant 6 bits of the CRC, reverse them, and use that as + * the bit number in the hash table. Bits 5:3 of the result give the byte + * within the table (0-7); bits 2:0 give the bit number within that byte (also + * 0-7), ie. the number of shifts needed to get it into the lsb position. + */ +static int +xe_compute_hashbit(u_int32_t crc) { + u_int8_t hashbit = 0; + int i; + + for (i = 0; i < 6; i++) { + hashbit >>= 1; + if (crc & 0x80000000) { + hashbit &= 0x80; + } + crc <<= 1; + } + return (hashbit >> 2); +} + + + +/************************************************************** + * * + * M I I F U N C T I O N S * + * * + **************************************************************/ + +/* + * Alternative MII/PHY handling code adapted from the xl driver. It doesn't + * seem to work any better than the xirc2_ps stuff, but it's cleaner code. + * XXX - this stuff shouldn't be here. It should all be abstracted off to + * XXX - some kind of common MII-handling code, shared by all drivers. But + * XXX - that's a whole other mission. + */ +#define XE_MII_SET(x) XE_OUTB(XE_GPR2, (XE_INB(XE_GPR2) | 0x04) | (x)) +#define XE_MII_CLR(x) XE_OUTB(XE_GPR2, (XE_INB(XE_GPR2) | 0x04) & ~(x)) + + +/* + * Sync the PHYs by setting data bit and strobing the clock 32 times. + */ +static void +xe_mii_sync(struct xe_softc *scp) { + register int i; + + XE_SELECT_PAGE(2); + XE_MII_SET(XE_MII_DIR|XE_MII_WRD); + + for (i = 0; i < 32; i++) { + XE_MII_SET(XE_MII_CLK); + DELAY(1); + XE_MII_CLR(XE_MII_CLK); + DELAY(1); + } +} + + +/* + * Look for a MII-compliant PHY. If we find one, reset it. + */ +static int +xe_mii_init(struct xe_softc *scp) { + u_int16_t status; + + status = xe_phy_readreg(scp, PHY_BMSR); + if ((status & 0xff00) != 0x7800) { +#if XE_DEBUG > 1 + device_printf(scp->dev, "no PHY found, %0x\n", status); +#endif + return 0; + } + else { +#if XE_DEBUG > 1 + device_printf(scp->dev, "PHY OK!\n"); +#endif + + /* Reset the PHY */ + xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_RESET); + DELAY(500); + while(xe_phy_readreg(scp, PHY_BMCR) & PHY_BMCR_RESET); + XE_MII_DUMP(scp); + return 1; + } +} + + +/* + * Clock a series of bits through the MII. + */ +static void +xe_mii_send(struct xe_softc *scp, u_int32_t bits, int cnt) { + int i; + + XE_SELECT_PAGE(2); + XE_MII_CLR(XE_MII_CLK); + + for (i = (0x1 << (cnt - 1)); i; i >>= 1) { + if (bits & i) { + XE_MII_SET(XE_MII_WRD); + } else { + XE_MII_CLR(XE_MII_WRD); + } + DELAY(1); + XE_MII_CLR(XE_MII_CLK); + DELAY(1); + XE_MII_SET(XE_MII_CLK); + } +} + + +/* + * Read an PHY register through the MII. + */ +static int +xe_mii_readreg(struct xe_softc *scp, struct xe_mii_frame *frame) { + int i, ack, s; + + s = splimp(); + + /* + * Set up frame for RX. + */ + frame->mii_stdelim = XE_MII_STARTDELIM; + frame->mii_opcode = XE_MII_READOP; + frame->mii_turnaround = 0; + frame->mii_data = 0; + + XE_SELECT_PAGE(2); + XE_OUTB(XE_GPR2, 0); + + /* + * Turn on data xmit. + */ + XE_MII_SET(XE_MII_DIR); + + xe_mii_sync(scp); + + /* + * Send command/address info. + */ + xe_mii_send(scp, frame->mii_stdelim, 2); + xe_mii_send(scp, frame->mii_opcode, 2); + xe_mii_send(scp, frame->mii_phyaddr, 5); + xe_mii_send(scp, frame->mii_regaddr, 5); + + /* Idle bit */ + XE_MII_CLR((XE_MII_CLK|XE_MII_WRD)); + DELAY(1); + XE_MII_SET(XE_MII_CLK); + DELAY(1); + + /* Turn off xmit. */ + XE_MII_CLR(XE_MII_DIR); + + /* Check for ack */ + XE_MII_CLR(XE_MII_CLK); + DELAY(1); + ack = XE_INB(XE_GPR2) & XE_MII_RDD; + XE_MII_SET(XE_MII_CLK); + DELAY(1); + + /* + * Now try reading data bits. If the ack failed, we still + * need to clock through 16 cycles to keep the PHY(s) in sync. + */ + if (ack) { + for(i = 0; i < 16; i++) { + XE_MII_CLR(XE_MII_CLK); + DELAY(1); + XE_MII_SET(XE_MII_CLK); + DELAY(1); + } + goto fail; + } + + for (i = 0x8000; i; i >>= 1) { + XE_MII_CLR(XE_MII_CLK); + DELAY(1); + if (!ack) { + if (XE_INB(XE_GPR2) & XE_MII_RDD) + frame->mii_data |= i; + DELAY(1); + } + XE_MII_SET(XE_MII_CLK); + DELAY(1); + } + +fail: + + XE_MII_CLR(XE_MII_CLK); + DELAY(1); + XE_MII_SET(XE_MII_CLK); + DELAY(1); + + splx(s); + + if (ack) + return(1); + return(0); +} + + +/* + * Write to a PHY register through the MII. + */ +static int +xe_mii_writereg(struct xe_softc *scp, struct xe_mii_frame *frame) { + int s; + + s = splimp(); + + /* + * Set up frame for TX. + */ + frame->mii_stdelim = XE_MII_STARTDELIM; + frame->mii_opcode = XE_MII_WRITEOP; + frame->mii_turnaround = XE_MII_TURNAROUND; + + XE_SELECT_PAGE(2); + + /* + * Turn on data output. + */ + XE_MII_SET(XE_MII_DIR); + + xe_mii_sync(scp); + + xe_mii_send(scp, frame->mii_stdelim, 2); + xe_mii_send(scp, frame->mii_opcode, 2); + xe_mii_send(scp, frame->mii_phyaddr, 5); + xe_mii_send(scp, frame->mii_regaddr, 5); + xe_mii_send(scp, frame->mii_turnaround, 2); + xe_mii_send(scp, frame->mii_data, 16); + + /* Idle bit. */ + XE_MII_SET(XE_MII_CLK); + DELAY(1); + XE_MII_CLR(XE_MII_CLK); + DELAY(1); + + /* + * Turn off xmit. + */ + XE_MII_CLR(XE_MII_DIR); + + splx(s); + + return(0); +} + + +/* + * Read a register from the PHY. + */ +static u_int16_t +xe_phy_readreg(struct xe_softc *scp, u_int16_t reg) { + struct xe_mii_frame frame; + + bzero((char *)&frame, sizeof(frame)); + + frame.mii_phyaddr = 0; + frame.mii_regaddr = reg; + xe_mii_readreg(scp, &frame); + + return(frame.mii_data); +} + + +/* + * Write to a PHY register. + */ +static void +xe_phy_writereg(struct xe_softc *scp, u_int16_t reg, u_int16_t data) { + struct xe_mii_frame frame; + + bzero((char *)&frame, sizeof(frame)); + + frame.mii_phyaddr = 0; + frame.mii_regaddr = reg; + frame.mii_data = data; + xe_mii_writereg(scp, &frame); + + return; +} + + +#ifdef XE_DEBUG +/* + * A bit of debugging code. + */ +static void +xe_mii_dump(struct xe_softc *scp) { + int i, s; + + s = splimp(); + + device_printf(scp->dev, "MII registers: "); + for (i = 0; i < 2; i++) { + printf(" %d:%04x", i, xe_phy_readreg(scp, i)); + } + for (i = 4; i < 7; i++) { + printf(" %d:%04x", i, xe_phy_readreg(scp, i)); + } + printf("\n"); + + (void)splx(s); +} + +static void +xe_reg_dump(struct xe_softc *scp) { + int page, i, s; + + s = splimp(); + + device_printf(scp->dev, "Common registers: "); + for (i = 0; i < 8; i++) { + printf(" %2.2x", XE_INB(i)); + } + printf("\n"); + + for (page = 0; page <= 8; page++) { + device_printf(scp->dev, "Register page %2.2x: ", page); + XE_SELECT_PAGE(page); + for (i = 8; i < 16; i++) { + printf(" %2.2x", XE_INB(i)); + } + printf("\n"); + } + + for (page = 0x10; page < 0x5f; page++) { + if ((page >= 0x11 && page <= 0x3f) || + (page == 0x41) || + (page >= 0x43 && page <= 0x4f) || + (page >= 0x59)) + continue; + device_printf(scp->dev, "Register page %2.2x: ", page); + XE_SELECT_PAGE(page); + for (i = 8; i < 16; i++) { + printf(" %2.2x", XE_INB(i)); + } + printf("\n"); + } + + (void)splx(s); +} +#endif + +int +xe_activate(device_t dev) +{ + struct xe_softc *sc = device_get_softc(dev); + int start, err; + + if (!sc->dingo) { + sc->port_rid = 0; /* 0 is managed by pccard */ + sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, + &sc->port_rid, 0, ~0, 16, RF_ACTIVE); + } else { + /* + * Find a 16 byte aligned ioport for the card. + */ +#if XE_DEBUG > 0 + device_printf(dev, "Finding an aligned port for RealPort\n"); +#endif /* XE_DEBUG */ + sc->port_rid = 1; /* 0 is managed by pccard */ + start = 0x100; + do { + sc->port_res = bus_alloc_resource(dev, + SYS_RES_IOPORT, &sc->port_rid, start, 0x3ff, 16, + RF_ACTIVE); + if (sc->port_res == 0) + break; /* we failed */ + if ((rman_get_start(sc->port_res) & 0xf) == 0) + break; /* good */ + bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid, + sc->port_res); + start = (rman_get_start(sc->port_res) + 15) & ~0xf; + } while (1); +#if XE_DEBUG > 2 + device_printf(dev, "port 0x%0lx, size 0x%0lx\n", + bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid), + bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)); +#endif /* XE_DEBUG */ + } + if (!sc->port_res) { +#if XE_DEBUG > 0 + device_printf(dev, "Cannot allocate ioport\n"); +#endif + return ENOMEM; + } + + sc->irq_rid = 0; + sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irq_rid, + 0, ~0, 1, RF_ACTIVE); + if (!sc->irq_res) { +#if XE_DEBUG > 0 + device_printf(dev, "Cannot allocate irq\n"); +#endif + xe_deactivate(dev); + return ENOMEM; + } + if ((err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, xe_intr, sc, + &sc->intrhand)) != 0) { + xe_deactivate(dev); + return err; + } + + sc->bst = rman_get_bustag(sc->port_res); + sc->bsh = rman_get_bushandle(sc->port_res); + return (0); +} + +void +xe_deactivate(device_t dev) +{ + struct xe_softc *sc = device_get_softc(dev); + + if (sc->intrhand) + bus_teardown_intr(dev, sc->irq_res, sc->intrhand); + sc->intrhand = 0; + if (sc->port_res) + bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid, + sc->port_res); + sc->port_res = 0; + if (sc->irq_res) + bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, + sc->irq_res); + sc->irq_res = 0; + return; +} |
