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freebsd-nq/sys/dev/xe/if_xe.c
Martin Blapp e808cf6260 When reading PHY regs over the i2c bus, the turnaround ACK bit 
is read one clock edge too late. This bit is driven low by
slave (as any other input data bits from slave) when the clock
is LOW. The current code did read the bit after the clock was
driven high again.

Reviewed by:	luoqi
MFC after:	2 weeks
2003-01-10 08:09:58 +00:00

1935 lines
50 KiB
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/*-
* 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);
}
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;
int result;
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 */
result = 0; /* Set true if the interrupt is for us */
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) {
result = 1; /* This device did generate an int */
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_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, ok;
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);
ok = free & 0x8000;
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;
}
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