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freebsd-dev/sys/dev/xe/if_xe.c
Pedro F. Giffuni 718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-3-Clause
*
* Copyright (c) 1998, 1999, 2003 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.
*/
/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* 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.
*
* Author email: <scott@uk.freebsd.org>
* Driver web page: http://ukug.uk.freebsd.org/~scott/xe_drv/
*/
#include <sys/param.h>
#include <sys/cdefs.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/sysctl.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_var.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 <net/if_types.h>
#include <dev/xe/if_xereg.h>
#include <dev/xe/if_xevar.h>
/*
* MII command structure
*/
struct xe_mii_frame {
uint8_t mii_stdelim;
uint8_t mii_opcode;
uint8_t mii_phyaddr;
uint8_t mii_regaddr;
uint8_t mii_turnaround;
uint16_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_init_locked(struct xe_softc *scp);
static void xe_start(struct ifnet *ifp);
static void xe_start_locked(struct ifnet *ifp);
static int xe_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
static void xe_watchdog(void *arg);
static void xe_intr(void *xscp);
static void xe_txintr(struct xe_softc *scp, uint8_t txst1);
static void xe_macintr(struct xe_softc *scp, uint8_t rst0, uint8_t txst0,
uint8_t txst1);
static void xe_rxintr(struct xe_softc *scp, uint8_t rst0);
static int xe_media_change(struct ifnet *ifp);
static void xe_media_status(struct ifnet *ifp, struct ifmediareq *mrp);
static void xe_setmedia(void *arg);
static void xe_reset(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_set_multicast(struct xe_softc *scp);
static void xe_set_addr(struct xe_softc *scp, uint8_t* addr, unsigned idx);
static void xe_mchash(struct xe_softc *scp, const uint8_t *addr);
static int xe_pio_write_packet(struct xe_softc *scp, struct mbuf *mbp);
/*
* 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, uint32_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 uint16_t xe_phy_readreg(struct xe_softc *scp, uint16_t reg);
static void xe_phy_writereg(struct xe_softc *scp, uint16_t reg,
uint16_t data);
/*
* Debugging functions
*/
static void xe_mii_dump(struct xe_softc *scp);
#if 0
static void xe_reg_dump(struct xe_softc *scp);
#endif
/*
* Debug logging levels - set with hw.xe.debug sysctl
* 0 = None
* 1 = More hardware details, probe/attach progress
* 2 = Most function calls, ioctls and media selection progress
* 3 = Everything - interrupts, packets in/out and multicast address setup
*/
#define XE_DEBUG
#ifdef XE_DEBUG
/* sysctl vars */
static SYSCTL_NODE(_hw, OID_AUTO, xe, CTLFLAG_RD, 0, "if_xe parameters");
int xe_debug = 0;
SYSCTL_INT(_hw_xe, OID_AUTO, debug, CTLFLAG_RW, &xe_debug, 0,
"if_xe debug level");
#define DEVPRINTF(level, arg) if (xe_debug >= (level)) device_printf arg
#define DPRINTF(level, arg) if (xe_debug >= (level)) printf arg
#define XE_MII_DUMP(scp) if (xe_debug >= 3) xe_mii_dump(scp)
#if 0
#define XE_REG_DUMP(scp) if (xe_debug >= 3) xe_reg_dump(scp)
#endif
#else
#define DEVPRINTF(level, arg)
#define DPRINTF(level, arg)
#define XE_MII_DUMP(scp)
#if 0
#define XE_REG_DUMP(scp)
#endif
#endif
/*
* Attach a device.
*/
int
xe_attach(device_t dev)
{
struct xe_softc *scp = device_get_softc(dev);
int err;
DEVPRINTF(2, (dev, "attach\n"));
/* Initialise stuff... */
scp->dev = dev;
scp->ifp = if_alloc(IFT_ETHER);
if (scp->ifp == NULL)
return (ENOSPC);
scp->ifm = &scp->ifmedia;
scp->autoneg_status = XE_AUTONEG_NONE;
mtx_init(&scp->lock, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
callout_init_mtx(&scp->wdog_timer, &scp->lock, 0);
/* Initialise the ifnet structure */
scp->ifp->if_softc = scp;
if_initname(scp->ifp, device_get_name(dev), device_get_unit(dev));
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_start = xe_start;
scp->ifp->if_ioctl = xe_ioctl;
scp->ifp->if_init = xe_init;
scp->ifp->if_baudrate = 100000000;
IFQ_SET_MAXLEN(&scp->ifp->if_snd, ifqmaxlen);
/* Initialise the ifmedia structure */
ifmedia_init(scp->ifm, 0, xe_media_change, xe_media_status);
callout_init_mtx(&scp->media_timer, &scp->lock, 0);
/* Add supported media types */
if (scp->mohawk) {
ifmedia_add(scp->ifm, IFM_ETHER|IFM_100_TX, 0, NULL);
ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
}
ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T, 0, NULL);
if (scp->ce2)
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);
/* Get the hardware into a known state */
XE_LOCK(scp);
xe_reset(scp);
XE_UNLOCK(scp);
/* Get hardware version numbers */
XE_SELECT_PAGE(4);
scp->version = XE_INB(XE_BOV);
if (scp->mohawk)
scp->srev = (XE_INB(XE_BOV) & 0x70) >> 4;
else
scp->srev = (XE_INB(XE_BOV) & 0x30) >> 4;
/* Print some useful information */
device_printf(dev, "version 0x%02x/0x%02x%s%s\n", scp->version,
scp->srev, scp->mohawk ? ", 100Mbps capable" : "",
scp->modem ? ", with modem" : "");
if (scp->mohawk) {
XE_SELECT_PAGE(0x10);
DEVPRINTF(1, (dev,
"DingoID=0x%04x, RevisionID=0x%04x, VendorID=0x%04x\n",
XE_INW(XE_DINGOID), XE_INW(XE_RevID), XE_INW(XE_VendorID)));
}
if (scp->ce2) {
XE_SELECT_PAGE(0x45);
DEVPRINTF(1, (dev, "CE2 version = 0x%02x\n", XE_INB(XE_REV)));
}
/* Attach the interface */
ether_ifattach(scp->ifp, scp->enaddr);
err = bus_setup_intr(dev, scp->irq_res, INTR_TYPE_NET | INTR_MPSAFE,
NULL, xe_intr, scp, &scp->intrhand);
if (err) {
ether_ifdetach(scp->ifp);
mtx_destroy(&scp->lock);
return (err);
}
/* Done */
return (0);
}
/*
* Complete hardware intitialisation and enable output. Exits without doing
* anything if there's no address assigned to the card, or if media selection
* is in progress (the latter implies we've already run this function).
*/
static void
xe_init(void *xscp)
{
struct xe_softc *scp = xscp;
XE_LOCK(scp);
xe_init_locked(scp);
XE_UNLOCK(scp);
}
static void
xe_init_locked(struct xe_softc *scp)
{
unsigned i;
if (scp->autoneg_status != XE_AUTONEG_NONE)
return;
DEVPRINTF(2, (scp->dev, "init\n"));
/* Reset transmitter flags */
scp->tx_queued = 0;
scp->tx_tpr = 0;
scp->tx_timeouts = 0;
scp->tx_thres = 64;
scp->tx_min = ETHER_MIN_LEN - ETHER_CRC_LEN;
scp->tx_timeout = 0;
/* Soft reset the card */
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, XE_GPR0_GP2_SELECT | XE_GPR0_GP1_SELECT |
XE_GPR0_GP2_OUT);
}
/* Shut off interrupts */
xe_disable_intr(scp);
/* Wait for everything to wake up */
DELAY(500000);
/* Check for PHY */
if (scp->mohawk)
scp->phy_ok = xe_mii_init(scp);
/* Disable 'source insertion' (not sure what that means) */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC0, XE_SWC0_NO_SRC_INSERT);
/* Set 8K/24K Tx/Rx buffer split */
if (scp->srev != 1) {
XE_SELECT_PAGE(2);
XE_OUTW(XE_RBS, 0x2000);
}
/* Enable early transmit mode on Mohawk/Dingo */
if (scp->mohawk) {
XE_SELECT_PAGE(0x03);
XE_OUTW(XE_TPT, scp->tx_thres);
XE_SELECT_PAGE(0x01);
XE_OUTB(XE_ECR, XE_INB(XE_ECR) | XE_ECR_EARLY_TX);
}
/* Put MAC address in first 'individual address' register */
XE_SELECT_PAGE(0x50);
for (i = 0; i < ETHER_ADDR_LEN; i++)
XE_OUTB(0x08 + i, IF_LLADDR(scp->ifp)[scp->mohawk ? 5 - i : i]);
/* Set up multicast addresses */
xe_set_multicast(scp);
/* Fix the receive data offset -- reset can leave it off-by-one */
XE_SELECT_PAGE(0);
XE_OUTW(XE_DO, 0x2000);
/* Set interrupt masks */
XE_SELECT_PAGE(1);
XE_OUTB(XE_IMR0, XE_IMR0_TX_PACKET | XE_IMR0_MAC_INTR |
XE_IMR0_RX_PACKET);
/* Set MAC interrupt masks */
XE_SELECT_PAGE(0x40);
XE_OUTB(XE_RX0Msk,
~(XE_RX0M_RX_OVERRUN | XE_RX0M_CRC_ERROR | XE_RX0M_ALIGN_ERROR |
XE_RX0M_LONG_PACKET));
XE_OUTB(XE_TX0Msk,
~(XE_TX0M_SQE_FAIL | XE_TX0M_LATE_COLLISION | XE_TX0M_TX_UNDERRUN |
XE_TX0M_16_COLLISIONS | XE_TX0M_NO_CARRIER));
/* Clear MAC status registers */
XE_SELECT_PAGE(0x40);
XE_OUTB(XE_RST0, 0x00);
XE_OUTB(XE_TXST0, 0x00);
/* Enable receiver and 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);
/* Start media selection */
xe_setmedia(scp);
/* Enable output */
scp->ifp->if_drv_flags |= IFF_DRV_RUNNING;
scp->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
callout_reset(&scp->wdog_timer, hz, xe_watchdog, scp);
}
/*
* Start output on interface. Should be called at splimp() priority. Check
* that the output is idle (ie, IFF_DRV_OACTIVE is not set) before calling this
* function. If media selection is in progress we set IFF_DRV_OACTIVE ourselves
* and return immediately.
*/
static void
xe_start(struct ifnet *ifp)
{
struct xe_softc *scp = ifp->if_softc;
XE_LOCK(scp);
xe_start_locked(ifp);
XE_UNLOCK(scp);
}
static void
xe_start_locked(struct ifnet *ifp)
{
struct xe_softc *scp = ifp->if_softc;
struct mbuf *mbp;
if (scp->autoneg_status != XE_AUTONEG_NONE) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
return;
}
DEVPRINTF(3, (scp->dev, "start\n"));
/*
* Loop while there are packets to be sent, and space to send
* them.
*/
for (;;) {
/* Suck a packet off the send queue */
IF_DEQUEUE(&ifp->if_snd, mbp);
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_drv_flags &= ~IFF_DRV_OACTIVE;
return;
}
if (xe_pio_write_packet(scp, mbp) != 0) {
/* Push the packet back onto the queue */
IF_PREPEND(&ifp->if_snd, mbp);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
return;
}
/* Tap off here if there is a bpf listener */
BPF_MTAP(ifp, mbp);
/* In case we don't hear from the card again... */
scp->tx_timeout = 5;
scp->tx_queued++;
m_freem(mbp);
}
}
/*
* Process an ioctl request. Adapted from the ed driver.
*/
static int
xe_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
struct xe_softc *scp;
int error;
scp = ifp->if_softc;
error = 0;
switch (command) {
case SIOCSIFFLAGS:
DEVPRINTF(2, (scp->dev, "ioctl: SIOCSIFFLAGS: 0x%04x\n",
ifp->if_flags));
/*
* If the interface is marked up and stopped, then
* start it. If it is marked down and running, then
* stop it.
*/
XE_LOCK(scp);
if (ifp->if_flags & IFF_UP) {
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
xe_reset(scp);
xe_init_locked(scp);
}
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
xe_stop(scp);
}
/* handle changes to PROMISC/ALLMULTI flags */
xe_set_multicast(scp);
XE_UNLOCK(scp);
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
DEVPRINTF(2, (scp->dev, "ioctl: SIOC{ADD,DEL}MULTI\n"));
/*
* Multicast list has (maybe) changed; set the
* hardware filters accordingly.
*/
XE_LOCK(scp);
xe_set_multicast(scp);
XE_UNLOCK(scp);
error = 0;
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
DEVPRINTF(3, (scp->dev, "ioctl: bounce to ifmedia_ioctl\n"));
/*
* Someone wants to get/set media options.
*/
error = ifmedia_ioctl(ifp, (struct ifreq *)data, &scp->ifmedia,
command);
break;
default:
DEVPRINTF(3, (scp->dev, "ioctl: bounce to ether_ioctl\n"));
error = ether_ioctl(ifp, command, data);
}
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_txintr(struct xe_softc *scp, uint8_t txst1)
{
struct ifnet *ifp;
uint8_t tpr, sent, coll;
ifp = scp->ifp;
/* Update packet count, accounting for rollover */
tpr = XE_INB(XE_TPR);
sent = -scp->tx_tpr + tpr;
/* Update statistics if we actually sent anything */
if (sent > 0) {
coll = txst1 & XE_TXST1_RETRY_COUNT;
scp->tx_tpr = tpr;
scp->tx_queued -= sent;
if_inc_counter(ifp, IFCOUNTER_OPACKETS, sent);
if_inc_counter(ifp, IFCOUNTER_COLLISIONS, coll);
/*
* According to the Xircom manual, Dingo will
* sometimes manage to transmit a packet with
* triggering an interrupt. If this happens, we have
* sent > 1 and the collision count only reflects
* collisions on the last packet sent (the one that
* triggered the interrupt). Collision stats might
* therefore be a bit low, but there doesn't seem to
* be anything we can do about that.
*/
switch (coll) {
case 0:
break;
case 1:
scp->mibdata.dot3StatsSingleCollisionFrames++;
scp->mibdata.dot3StatsCollFrequencies[0]++;
break;
default:
scp->mibdata.dot3StatsMultipleCollisionFrames++;
scp->mibdata.dot3StatsCollFrequencies[coll-1]++;
}
}
scp->tx_timeout = 0;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
}
/* Handle most MAC interrupts */
static void
xe_macintr(struct xe_softc *scp, uint8_t rst0, uint8_t txst0, uint8_t txst1)
{
struct ifnet *ifp;
ifp = scp->ifp;
#if 0
/* Carrier sense lost -- only in 10Mbit HDX mode */
if (txst0 & XE_TXST0_NO_CARRIER || !(txst1 & XE_TXST1_LINK_STATUS)) {
/* XXX - Need to update media status here */
device_printf(scp->dev, "no carrier\n");
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsCarrierSenseErrors++;
}
#endif
/* Excessive collisions -- try sending again */
if (txst0 & XE_TXST0_16_COLLISIONS) {
if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 16);
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsExcessiveCollisions++;
scp->mibdata.dot3StatsMultipleCollisionFrames++;
scp->mibdata.dot3StatsCollFrequencies[15]++;
XE_OUTB(XE_CR, XE_CR_RESTART_TX);
}
/* Transmit underrun -- increase early transmit threshold */
if (txst0 & XE_TXST0_TX_UNDERRUN && scp->mohawk) {
DEVPRINTF(1, (scp->dev, "transmit underrun"));
if (scp->tx_thres < ETHER_MAX_LEN) {
if ((scp->tx_thres += 64) > ETHER_MAX_LEN)
scp->tx_thres = ETHER_MAX_LEN;
DPRINTF(1, (": increasing transmit threshold to %u",
scp->tx_thres));
XE_SELECT_PAGE(0x3);
XE_OUTW(XE_TPT, scp->tx_thres);
XE_SELECT_PAGE(0x0);
}
DPRINTF(1, ("\n"));
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsInternalMacTransmitErrors++;
}
/* Late collision -- just complain about it */
if (txst0 & XE_TXST0_LATE_COLLISION) {
device_printf(scp->dev, "late collision\n");
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsLateCollisions++;
}
/* SQE test failure -- just complain about it */
if (txst0 & XE_TXST0_SQE_FAIL) {
device_printf(scp->dev, "SQE test failure\n");
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsSQETestErrors++;
}
/* Packet too long -- what happens to these */
if (rst0 & XE_RST0_LONG_PACKET) {
device_printf(scp->dev, "received giant packet\n");
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
scp->mibdata.dot3StatsFrameTooLongs++;
}
/* CRC error -- packet dropped */
if (rst0 & XE_RST0_CRC_ERROR) {
device_printf(scp->dev, "CRC error\n");
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
scp->mibdata.dot3StatsFCSErrors++;
}
}
static void
xe_rxintr(struct xe_softc *scp, uint8_t rst0)
{
struct ifnet *ifp;
uint8_t esr, rsr;
ifp = scp->ifp;
/* Handle received packet(s) */
while ((esr = XE_INB(XE_ESR)) & XE_ESR_FULL_PACKET_RX) {
rsr = XE_INB(XE_RSR);
DEVPRINTF(3, (scp->dev, "intr: ESR=0x%02x, RSR=0x%02x\n", esr,
rsr));
/* Make sure packet is a good one */
if (rsr & XE_RSR_RX_OK) {
struct ether_header *ehp;
struct mbuf *mbp;
uint16_t len;
len = XE_INW(XE_RBC) - ETHER_CRC_LEN;
DEVPRINTF(3, (scp->dev, "intr: receive length = %d\n",
len));
if (len == 0) {
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
continue;
}
/*
* Allocate mbuf to hold received packet. If
* the mbuf header isn't big enough, we attach
* an mbuf cluster to hold the packet. Note
* the +=2 to align the packet data on a
* 32-bit boundary, and the +3 to allow for
* the possibility of reading one more byte
* than the actual packet length (we always
* read 16-bit words). XXX - Surely there's a
* better way to do this alignment?
*/
MGETHDR(mbp, M_NOWAIT, MT_DATA);
if (mbp == NULL) {
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
continue;
}
if (len + 3 > MHLEN) {
if (!(MCLGET(mbp, M_NOWAIT))) {
m_freem(mbp);
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
continue;
}
}
mbp->m_data += 2;
ehp = mtod(mbp, struct ether_header *);
/*
* Now get the packet in PIO mode, including
* the Ethernet header but omitting the
* trailing CRC.
*/
/*
* Work around a bug in CE2 cards. There
* seems to be a problem with duplicated and
* extraneous bytes in the receive buffer, but
* without any real documentation for the CE2
* it's hard to tell for sure. XXX - Needs
* testing on CE2 hardware
*/
if (scp->srev == 0) {
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;
for (i = 0; i < len; i++, rhs++) {
((char *)ehp)[i] =
XE_INB(XE_EDP);
if (rhs == 0x8000) {
rhs = 0;
i--;
}
}
} else
bus_read_multi_2(scp->port_res, XE_EDP,
(uint16_t *)ehp, (len + 1) >> 1);
} else
bus_read_multi_2(scp->port_res, XE_EDP,
(uint16_t *)ehp, (len + 1) >> 1);
/* Deliver packet to upper layers */
mbp->m_pkthdr.rcvif = ifp;
mbp->m_pkthdr.len = mbp->m_len = len;
XE_UNLOCK(scp);
(*ifp->if_input)(ifp, mbp);
XE_LOCK(scp);
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
} else if (rsr & XE_RSR_ALIGN_ERROR) {
/* Packet alignment error -- drop packet */
device_printf(scp->dev, "alignment error\n");
scp->mibdata.dot3StatsAlignmentErrors++;
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
}
/* Skip to next packet, if there is one */
XE_OUTW(XE_DO, 0x8000);
}
/* Clear receiver overruns now we have some free buffer space */
if (rst0 & XE_RST0_RX_OVERRUN) {
DEVPRINTF(1, (scp->dev, "receive overrun\n"));
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
scp->mibdata.dot3StatsInternalMacReceiveErrors++;
XE_OUTB(XE_CR, XE_CR_CLEAR_OVERRUN);
}
}
static void
xe_intr(void *xscp)
{
struct xe_softc *scp = (struct xe_softc *) xscp;
struct ifnet *ifp;
uint8_t psr, isr, rst0, txst0, txst1;
ifp = scp->ifp;
XE_LOCK(scp);
/* Disable interrupts */
if (scp->mohawk)
XE_OUTB(XE_CR, 0);
/* Cache current register page */
psr = XE_INB(XE_PR);
/* Read ISR to see what caused this interrupt */
while ((isr = XE_INB(XE_ISR)) != 0) {
/* 0xff might mean the card is no longer around */
if (isr == 0xff) {
DEVPRINTF(3, (scp->dev,
"intr: interrupt received for missing card?\n"));
break;
}
/* Read other status registers */
XE_SELECT_PAGE(0x40);
rst0 = XE_INB(XE_RST0);
XE_OUTB(XE_RST0, 0);
txst0 = XE_INB(XE_TXST0);
txst1 = XE_INB(XE_TXST1);
XE_OUTB(XE_TXST0, 0);
XE_OUTB(XE_TXST1, 0);
XE_SELECT_PAGE(0);
DEVPRINTF(3, (scp->dev,
"intr: ISR=0x%02x, RST=0x%02x, TXT=0x%02x%02x\n", isr,
rst0, txst1, txst0));
if (isr & XE_ISR_TX_PACKET)
xe_txintr(scp, txst1);
if (isr & XE_ISR_MAC_INTR)
xe_macintr(scp, rst0, txst0, txst1);
xe_rxintr(scp, rst0);
}
/* Restore saved page */
XE_SELECT_PAGE(psr);
/* Re-enable interrupts */
XE_OUTB(XE_CR, XE_CR_ENABLE_INTR);
XE_UNLOCK(scp);
}
/*
* 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(void *arg)
{
struct xe_softc *scp = arg;
XE_ASSERT_LOCKED(scp);
if (scp->tx_timeout && --scp->tx_timeout == 0) {
device_printf(scp->dev, "watchdog timeout: resetting card\n");
scp->tx_timeouts++;
if_inc_counter(scp->ifp, IFCOUNTER_OERRORS, scp->tx_queued);
xe_stop(scp);
xe_reset(scp);
xe_init_locked(scp);
}
callout_reset(&scp->wdog_timer, hz, xe_watchdog, scp);
}
/*
* Change media selection.
*/
static int
xe_media_change(struct ifnet *ifp)
{
struct xe_softc *scp = ifp->if_softc;
DEVPRINTF(2, (scp->dev, "media_change\n"));
XE_LOCK(scp);
if (IFM_TYPE(scp->ifm->ifm_media) != IFM_ETHER) {
XE_UNLOCK(scp);
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) {
XE_UNLOCK(scp);
return (EINVAL);
}
xe_setmedia(scp);
XE_UNLOCK(scp);
return (0);
}
/*
* Return current media selection.
*/
static void
xe_media_status(struct ifnet *ifp, struct ifmediareq *mrp)
{
struct xe_softc *scp = ifp->if_softc;
DEVPRINTF(3, (scp->dev, "media_status\n"));
/* XXX - This is clearly wrong. Will fix once I have CE2 working */
XE_LOCK(scp);
mrp->ifm_status = IFM_AVALID | IFM_ACTIVE;
mrp->ifm_active = ((struct xe_softc *)ifp->if_softc)->media;
XE_UNLOCK(scp);
}
/*
* Select active media.
*/
static void
xe_setmedia(void *xscp)
{
struct xe_softc *scp = xscp;
uint16_t bmcr, bmsr, anar, lpar;
DEVPRINTF(2, (scp->dev, "setmedia\n"));
XE_ASSERT_LOCKED(scp);
/* Cancel any pending timeout */
callout_stop(&scp->media_timer);
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:
DEVPRINTF(2, (scp->dev,
"Waiting for idle transmitter\n"));
scp->ifp->if_drv_flags |= IFF_DRV_OACTIVE;
scp->autoneg_status = XE_AUTONEG_WAITING;
/* FALL THROUGH */
case XE_AUTONEG_WAITING:
if (scp->tx_queued != 0) {
callout_reset(&scp->media_timer, hz / 2,
xe_setmedia, scp);
return;
}
if (scp->phy_ok) {
DEVPRINTF(2, (scp->dev,
"Starting autonegotiation\n"));
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;
callout_reset(&scp->media_timer, hz * 7/2,
xe_setmedia, scp);
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)) {
DEVPRINTF(2, (scp->dev,
"Autonegotiation complete!\n"));
/*
* XXX - Shouldn't have to do this,
* but (on my hub at least) the
* transmitter won't work after a
* successful autoneg. So we see what
* the negotiation result was and
* force that mode. I'm 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. This is
* derived from Ken Hughes
* patch to the Linux driver
* to make it work with 10Mbit
* _autonegotiated_ links on
* CE3B cards. What's a CE3B
* and how's it differ from a
* plain CE3? 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 */
#if 0
/* Display PHY? */
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);
scp->autoneg_status = XE_AUTONEG_FAIL;
#endif
}
} else {
DEVPRINTF(2, (scp->dev,
"Autonegotiation failed; trying 100baseTX\n"));
XE_MII_DUMP(scp);
if (scp->phy_ok) {
xe_phy_writereg(scp, PHY_BMCR,
PHY_BMCR_SPEEDSEL);
scp->autoneg_status = XE_AUTONEG_100TX;
callout_reset(&scp->media_timer, hz * 3,
xe_setmedia, scp);
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) {
DEVPRINTF(2, (scp->dev,
"Got 100baseTX link!\n"));
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 {
DEVPRINTF(2, (scp->dev,
"Autonegotiation failed; disabling PHY\n"));
XE_MII_DUMP(scp);
xe_phy_writereg(scp, PHY_BMCR, 0x0000);
XE_SELECT_PAGE(2);
/* Disable PHY? */
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);
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) {
DEVPRINTF(2, (scp->dev, "Selecting 10baseX\n"));
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 but there is no PHY, we fall back to 10baseT
* operation).
*/
case IFM_100_TX: /* Force 100baseTX */
if (scp->phy_ok) {
DEVPRINTF(2, (scp->dev, "Selecting 100baseTX\n"));
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 */
DEVPRINTF(2, (scp->dev, "Selecting 10baseT\n"));
if (scp->phy_ok) {
xe_phy_writereg(scp, PHY_BMCR, 0x0000);
XE_SELECT_PAGE(2);
/* Disable PHY */
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);
}
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, 0x80);
scp->media |= IFM_10_T;
break;
case IFM_10_2:
DEVPRINTF(2, (scp->dev, "Selecting 10base2\n"));
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.
*/
DEVPRINTF(2, (scp->dev, "Setting LEDs\n"));
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? */
xe_enable_intr(scp);
scp->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
xe_start_locked(scp->ifp);
}
/*
* Hard reset (power cycle) the card.
*/
static void
xe_reset(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "reset\n"));
XE_ASSERT_LOCKED(scp);
/* Power down */
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR1, 0);
DELAY(40000);
/* Power up again */
if (scp->mohawk)
XE_OUTB(XE_GPR1, XE_GPR1_POWER_DOWN);
else
XE_OUTB(XE_GPR1, XE_GPR1_POWER_DOWN | XE_GPR1_AIC);
DELAY(40000);
XE_SELECT_PAGE(0);
}
/*
* 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.
*/
void
xe_stop(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "stop\n"));
XE_ASSERT_LOCKED(scp);
/*
* Shut off interrupts.
*/
xe_disable_intr(scp);
/*
* Power down.
*/
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR1, 0);
XE_SELECT_PAGE(0);
if (scp->mohawk) {
/*
* set GP1 and GP2 as outputs (bits 2 & 3)
* set GP1 high to power on the ML6692 (bit 0)
* set GP2 low to power on the 10Mhz chip (bit 1)
*/
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR0, XE_GPR0_GP2_SELECT | XE_GPR0_GP1_SELECT |
XE_GPR0_GP1_OUT);
}
/*
* ~IFF_DRV_RUNNING == interface down.
*/
scp->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
scp->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
scp->tx_timeout = 0;
callout_stop(&scp->wdog_timer);
callout_stop(&scp->media_timer);
}
/*
* Enable interrupts from the card.
*/
static void
xe_enable_intr(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "enable_intr\n"));
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 */
}
}
}
/*
* Disable interrupts from the card.
*/
static void
xe_disable_intr(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "disable_intr\n"));
XE_SELECT_PAGE(0);
XE_OUTB(XE_CR, 0); /* Disable interrupts */
if (scp->modem && !scp->dingo) { /* More magic */
XE_OUTB(0x10, 0x10); /* Mask the master int enable */
}
}
/*
* Set up multicast filter and promiscuous modes.
*/
static void
xe_set_multicast(struct xe_softc *scp)
{
struct ifnet *ifp;
struct ifmultiaddr *maddr;
unsigned count, i;
DEVPRINTF(2, (scp->dev, "set_multicast\n"));
ifp = scp->ifp;
XE_SELECT_PAGE(0x42);
/* Handle PROMISC flag */
if (ifp->if_flags & IFF_PROMISC) {
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) | XE_SWC1_PROMISCUOUS);
return;
} else
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) & ~XE_SWC1_PROMISCUOUS);
/* Handle ALLMULTI flag */
if (ifp->if_flags & IFF_ALLMULTI) {
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) | XE_SWC1_ALLMULTI);
return;
} else
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) & ~XE_SWC1_ALLMULTI);
/* Iterate over multicast address list */
count = 0;
if_maddr_rlock(ifp);
TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
if (maddr->ifma_addr->sa_family != AF_LINK)
continue;
count++;
if (count < 10)
/*
* First 9 use Individual Addresses for exact
* matching.
*/
xe_set_addr(scp,
LLADDR((struct sockaddr_dl *)maddr->ifma_addr),
count);
else if (scp->mohawk)
/* Use hash filter on Mohawk and Dingo */
xe_mchash(scp,
LLADDR((struct sockaddr_dl *)maddr->ifma_addr));
else
/* Nowhere else to put them on CE2 */
break;
}
if_maddr_runlock(ifp);
DEVPRINTF(2, (scp->dev, "set_multicast: count = %u\n", count));
/* Now do some cleanup and enable multicast handling as needed */
if (count == 0) {
/* Disable all multicast handling */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) &
~(XE_SWC1_IA_ENABLE | XE_SWC1_ALLMULTI));
if (scp->mohawk) {
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~XE_MSR_HASH_TABLE);
}
} else if (count < 10) {
/*
* Full in any unused Individual Addresses with our
* MAC address.
*/
for (i = count + 1; i < 10; i++)
xe_set_addr(scp, IF_LLADDR(scp->ifp), i);
/* Enable Individual Address matching only */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) & ~XE_SWC1_ALLMULTI) |
XE_SWC1_IA_ENABLE);
if (scp->mohawk) {
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~XE_MSR_HASH_TABLE);
}
} else if (scp->mohawk) {
/* Check whether hash table is full */
XE_SELECT_PAGE(0x58);
for (i = 0x08; i < 0x10; i++)
if (XE_INB(i) != 0xff)
break;
if (i == 0x10) {
/*
* Hash table full - enable
* promiscuous multicast matching
*/
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) &
~XE_SWC1_IA_ENABLE) | XE_SWC1_ALLMULTI);
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~XE_MSR_HASH_TABLE);
} else {
/* Enable hash table and Individual Address matching */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) & ~XE_SWC1_ALLMULTI) |
XE_SWC1_IA_ENABLE);
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) | XE_MSR_HASH_TABLE);
}
} else {
/* Enable promiscuous multicast matching */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) & ~XE_SWC1_IA_ENABLE) |
XE_SWC1_ALLMULTI);
}
XE_SELECT_PAGE(0);
}
/*
* Copy the Ethernet multicast address in addr to the on-chip registers for
* Individual Address idx. Assumes that addr is really a multicast address
* and that idx > 0 (slot 0 is always used for the card MAC address).
*/
static void
xe_set_addr(struct xe_softc *scp, uint8_t* addr, unsigned idx)
{
uint8_t page, reg;
unsigned i;
/*
* Individual Addresses are stored in registers 8-F of pages
* 0x50-0x57. IA1 therefore starts at register 0xE on page
* 0x50. The expressions below compute the starting page and
* register for any IA index > 0.
*/
--idx;
page = 0x50 + idx % 4 + idx / 4 * 3;
reg = 0x0e - 2 * (idx % 4);
DEVPRINTF(3, (scp->dev,
"set_addr: idx = %u, page = 0x%02x, reg = 0x%02x\n", idx + 1, page,
reg));
/*
* Copy the IA bytes. Note that the byte order is reversed
* for Mohawk and Dingo wrt. CE2 hardware.
*/
XE_SELECT_PAGE(page);
for (i = 0; i < ETHER_ADDR_LEN; i++) {
if (i > 0) {
DPRINTF(3, (":%02x", addr[i]));
} else {
DEVPRINTF(3, (scp->dev, "set_addr: %02x", addr[0]));
}
XE_OUTB(reg, addr[scp->mohawk ? 5 - i : i]);
if (++reg == 0x10) {
reg = 0x08;
XE_SELECT_PAGE(++page);
}
}
DPRINTF(3, ("\n"));
}
/*
* Set the appropriate bit in the multicast hash table for the supplied
* Ethernet multicast address addr. Assumes that addr is really a multicast
* address.
*/
static void
xe_mchash(struct xe_softc* scp, const uint8_t *addr)
{
int bit;
uint8_t byte, hash;
hash = ether_crc32_le(addr, ETHER_ADDR_LEN) & 0x3F;
/*
* Top 3 bits of hash give register - 8, bottom 3 give bit
* within register.
*/
byte = hash >> 3 | 0x08;
bit = 0x01 << (hash & 0x07);
DEVPRINTF(3, (scp->dev,
"set_hash: hash = 0x%02x, byte = 0x%02x, bit = 0x%02x\n", hash,
byte, bit));
XE_SELECT_PAGE(0x58);
XE_OUTB(byte, XE_INB(byte) | bit);
}
/*
* Write an outgoing packet to the card using programmed I/O.
*/
static int
xe_pio_write_packet(struct xe_softc *scp, struct mbuf *mbp)
{
unsigned len, pad;
unsigned char wantbyte;
uint8_t *data;
uint8_t savebyte[2];
/* Get total packet length */
if (mbp->m_flags & M_PKTHDR)
len = mbp->m_pkthdr.len;
else {
struct mbuf* mbp2 = mbp;
for (len = 0; mbp2 != NULL;
len += mbp2->m_len, mbp2 = mbp2->m_next);
}
DEVPRINTF(3, (scp->dev, "pio_write_packet: len = %u\n", len));
/* Packets < minimum length may need to be padded out */
pad = 0;
if (len < scp->tx_min) {
pad = scp->tx_min - len;
len = scp->tx_min;
}
/* Check transmit buffer space */
XE_SELECT_PAGE(0);
XE_OUTW(XE_TRS, len + 2); /* Only effective on rev. 1 CE2 cards */
if ((XE_INW(XE_TSO) & 0x7fff) <= 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_write_multi_2(scp->port_res, XE_EDP,
(uint16_t *)data, len >> 1);
data += len & ~1;
len &= 1;
}
if (len == 1) { /* Save last byte, if needed */
savebyte[0] = *data;
wantbyte = 1;
}
}
mbp = mbp->m_next;
}
/*
* Send last byte of odd-length packets
*/
if (wantbyte)
XE_OUTB(XE_EDP, savebyte[0]);
/*
* Can just tell CE3 cards to send; short packets will be
* padded out with random cruft automatically. For CE2,
* manually pad the packet with garbage; it will be sent when
* the required number of bytes have been delivered to the
* card.
*/
if (scp->mohawk)
XE_OUTB(XE_CR, XE_CR_TX_PACKET | XE_CR_RESTART_TX |
XE_CR_ENABLE_INTR);
else if (pad > 0) {
if (pad & 0x01)
XE_OUTB(XE_EDP, 0xaa);
pad >>= 1;
while (pad > 0) {
XE_OUTW(XE_EDP, 0xdead);
pad--;
}
}
return (0);
}
/**************************************************************
* *
* 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)
{
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)
{
uint16_t status;
status = xe_phy_readreg(scp, PHY_BMSR);
if ((status & 0xff00) != 0x7800) {
DEVPRINTF(2, (scp->dev, "no PHY found, %0x\n", status));
return (0);
} else {
DEVPRINTF(2, (scp->dev, "PHY OK!\n"));
/* Reset the PHY */
xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_RESET);
DELAY(500);
while(xe_phy_readreg(scp, PHY_BMCR) & PHY_BMCR_RESET)
; /* nothing */
XE_MII_DUMP(scp);
return (1);
}
}
/*
* Clock a series of bits through the MII.
*/
static void
xe_mii_send(struct xe_softc *scp, uint32_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;
XE_ASSERT_LOCKED(scp);
/*
* 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);
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)
{
XE_ASSERT_LOCKED(scp);
/*
* 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);
return(0);
}
/*
* Read a register from the PHY.
*/
static uint16_t
xe_phy_readreg(struct xe_softc *scp, uint16_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, uint16_t reg, uint16_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);
}
/*
* A bit of debugging code.
*/
static void
xe_mii_dump(struct xe_softc *scp)
{
int i;
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");
}
#if 0
void
xe_reg_dump(struct xe_softc *scp)
{
int page, i;
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");
}
}
#endif
int
xe_activate(device_t dev)
{
struct xe_softc *sc = device_get_softc(dev);
int start, i;
DEVPRINTF(2, (dev, "activate\n"));
if (!sc->modem) {
sc->port_rid = 0; /* 0 is managed by pccard */
sc->port_res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT,
&sc->port_rid, 16, RF_ACTIVE);
} else if (sc->dingo) {
/*
* Find a 16 byte aligned ioport for the card.
*/
DEVPRINTF(1, (dev, "Finding an aligned port for RealPort\n"));
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 == NULL)
break;
if ((rman_get_start(sc->port_res) & 0xf) == 0)
break;
bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
sc->port_res);
start = (rman_get_start(sc->port_res) + 15) & ~0xf;
} while (1);
DEVPRINTF(1, (dev, "RealPort port 0x%0jx, size 0x%0jx\n",
bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid),
bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)));
} else if (sc->ce2) {
/*
* Find contiguous I/O port for the Ethernet function
* on CEM2 and CEM3 cards. We allocate window 0
* wherever pccard has decided it should be, then find
* an available window adjacent to it for the second
* function. Not sure that both windows are actually
* needed.
*/
DEVPRINTF(1, (dev, "Finding I/O port for CEM2/CEM3\n"));
sc->ce2_port_rid = 0; /* 0 is managed by pccard */
sc->ce2_port_res = bus_alloc_resource_anywhere(dev,
SYS_RES_IOPORT, &sc->ce2_port_rid, 8, RF_ACTIVE);
if (sc->ce2_port_res == NULL) {
DEVPRINTF(1, (dev,
"Cannot allocate I/O port for modem\n"));
xe_deactivate(dev);
return (ENOMEM);
}
sc->port_rid = 1;
start = bus_get_resource_start(dev, SYS_RES_IOPORT,
sc->ce2_port_rid);
for (i = 0; i < 2; i++) {
start += (i == 0 ? 8 : -24);
sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->port_rid, start, start + 15, 16, RF_ACTIVE);
if (sc->port_res == NULL)
continue;
if (bus_get_resource_start(dev, SYS_RES_IOPORT,
sc->port_rid) == start)
break;
bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
sc->port_res);
sc->port_res = NULL;
}
DEVPRINTF(1, (dev, "CEM2/CEM3 port 0x%0jx, size 0x%0jx\n",
bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid),
bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)));
}
if (!sc->port_res) {
DEVPRINTF(1, (dev, "Cannot allocate ioport\n"));
xe_deactivate(dev);
return (ENOMEM);
}
sc->irq_rid = 0;
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
RF_ACTIVE);
if (sc->irq_res == NULL) {
DEVPRINTF(1, (dev, "Cannot allocate irq\n"));
xe_deactivate(dev);
return (ENOMEM);
}
return (0);
}
void
xe_deactivate(device_t dev)
{
struct xe_softc *sc = device_get_softc(dev);
DEVPRINTF(2, (dev, "deactivate\n"));
if (sc->intrhand)
bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
sc->intrhand = NULL;
if (sc->port_res)
bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
sc->port_res);
sc->port_res = NULL;
if (sc->ce2_port_res)
bus_release_resource(dev, SYS_RES_IOPORT, sc->ce2_port_rid,
sc->ce2_port_res);
sc->ce2_port_res = NULL;
if (sc->irq_res)
bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
sc->irq_res);
sc->irq_res = NULL;
if (sc->ifp)
if_free(sc->ifp);
sc->ifp = NULL;
}
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