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freebsd-nq/sys/i386/isa/if_fe.c
Nate Williams 075a76a29e - Instead of relying on a functional call to register PCARD-capable drivers, 
use a Linker Set.  Note, if a driver is loaded as an LKM  if will have
  to use the function call, but since none of the existing drivers
  are loadable, this made things cleaner and boot messages nicer.

Obtained from:	PAO-970616
1997-10-26 21:08:42 +00:00

3148 lines
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C
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/*
* All Rights Reserved, Copyright (C) Fujitsu Limited 1995
*
* This software may be used, modified, copied, distributed, and sold, in
* both source and binary form provided that the above copyright, these
* terms and the following disclaimer are retained. The name of the author
* and/or the contributor may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``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 THE CONTRIBUTOR 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_fe.c,v 1.31 1997/10/26 04:53:54 nate Exp $
*
* Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards.
* To be used with FreeBSD 2.x
* Contributed by M. Sekiguchi. <seki@sysrap.cs.fujitsu.co.jp>
*
* This version is intended to be a generic template for various
* MB86960A/MB86965A based Ethernet cards. It currently supports
* Fujitsu FMV-180 series for ISA and Allied-Telesis AT1700/RE2000
* series for ISA, as well as Fujitsu MBH10302 PC card.
* There are some currently-
* unused hooks embedded, which are primarily intended to support
* other types of Ethernet cards, but the author is not sure whether
* they are useful.
*
* This version also includes some alignments for
* RE1000/RE1000+/ME1500 support. It is incomplete, however, since the
* cards are not for AT-compatibles. (They are for PC98 bus -- a
* proprietary bus architecture available only in Japan.) Further
* work for PC98 version will be available as a part of FreeBSD(98)
* project.
*
* This software is a derivative work of if_ed.c version 1.56 by David
* Greenman available as a part of FreeBSD 2.0 RELEASE source distribution.
*
* The following lines are retained from the original if_ed.c:
*
* Copyright (C) 1993, David Greenman. This software may be used, modified,
* copied, distributed, and sold, in both source and binary form provided
* that the above copyright and these terms are retained. Under no
* circumstances is the author responsible for the proper functioning
* of this software, nor does the author assume any responsibility
* for damages incurred with its use.
*/
/*
* TODO:
* o To support MBH10304 PC card. It is another MB8696x based
* PCMCIA Ethernet card by Fujitsu, which is not compatible with
* MBH10302.
* o To merge FreeBSD(98) efforts into a single source file.
* o To support ISA PnP auto configuration for FMV-183/184.
* o To reconsider mbuf usage.
* o To reconsider transmission buffer usage, including
* transmission buffer size (currently 4KB x 2) and pros-and-
* cons of multiple frame transmission.
* o To test IPX codes.
*/
#include "fe.h"
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_dl.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
/* IPX code is not tested. FIXME. */
#ifdef IPX
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif
/* To be used with IPv6 package of INRIA. */
#ifdef INET6
/* IPv6 added by shin 96.2.6 */
#include <netinet/if_ether6.h>
#endif
/* XNS code is not tested. FIXME. */
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/icu.h>
/* PCCARD suport */
#include "card.h"
#if NCARD > 0
#include <sys/select.h>
#include <pccard/card.h>
#include <pccard/slot.h>
#include <pccard/driver.h>
#endif
#include <i386/isa/ic/mb86960.h>
#include <i386/isa/if_fereg.h>
/*
* This version of fe is an ISA device driver.
* Override the following macro to adapt it to another bus.
* (E.g., PC98.)
*/
#define DEVICE struct isa_device
/*
* Default settings for fe driver specific options.
* They can be set in config file by "options" statements.
*/
/*
* Debug control.
* 0: No debug at all. All debug specific codes are stripped off.
* 1: Silent. No debug messages are logged except emergent ones.
* 2: Brief. Lair events and/or important information are logged.
* 3: Detailed. Logs all information which *may* be useful for debugging.
* 4: Trace. All actions in the driver is logged. Super verbose.
*/
#ifndef FE_DEBUG
#define FE_DEBUG 1
#endif
/*
* Transmit just one packet per a "send" command to 86960.
* This option is intended for performance test. An EXPERIMENTAL option.
*/
#ifndef FE_SINGLE_TRANSMISSION
#define FE_SINGLE_TRANSMISSION 0
#endif
/*
* Device configuration flags.
*/
/* DLCR6 settings. */
#define FE_FLAGS_DLCR6_VALUE 0x007F
/* Force DLCR6 override. */
#define FE_FLAGS_OVERRIDE_DLCR6 0x0080
/* Shouldn't these be defined somewhere else such as isa_device.h? */
#define NO_IOADDR (-1)
#define NO_IRQ 0
/*
* Data type for a multicast address filter on 8696x.
*/
struct fe_filter { u_char data [ FE_FILTER_LEN ]; };
/*
* Special filter values.
*/
static struct fe_filter const fe_filter_nothing = { FE_FILTER_NOTHING };
static struct fe_filter const fe_filter_all = { FE_FILTER_ALL };
/* How many registers does an fe-supported adapter have at maximum? */
#define MAXREGISTERS 32
/*
* fe_softc: per line info and status
*/
static struct fe_softc {
/* Used by "common" codes. */
struct arpcom arpcom; /* Ethernet common */
/* Used by config codes. */
/* Set by probe() and not modified in later phases. */
char * typestr; /* printable name of the interface. */
u_short iobase; /* base I/O address of the adapter. */
u_short ioaddr [ MAXREGISTERS ]; /* I/O addresses of register. */
u_short txb_size; /* size of TX buffer, in bytes */
u_char proto_dlcr4; /* DLCR4 prototype. */
u_char proto_dlcr5; /* DLCR5 prototype. */
u_char proto_dlcr6; /* DLCR6 prototype. */
u_char proto_dlcr7; /* DLCR7 prototype. */
u_char proto_bmpr13; /* BMPR13 prototype. */
/* Vendor specific hooks. */
void ( * init )( struct fe_softc * ); /* Just before fe_init(). */
void ( * stop )( struct fe_softc * ); /* Just after fe_stop(). */
/* Transmission buffer management. */
u_short txb_free; /* free bytes in TX buffer */
u_char txb_count; /* number of packets in TX buffer */
u_char txb_sched; /* number of scheduled packets */
/* Excessive collision counter (see fe_tint() for details. */
u_char tx_excolls; /* # of excessive collisions. */
/* Multicast address filter management. */
u_char filter_change; /* MARs must be changed ASAP. */
struct fe_filter filter;/* new filter value. */
} fe_softc[NFE];
#define sc_if arpcom.ac_if
#define sc_unit arpcom.ac_if.if_unit
#define sc_enaddr arpcom.ac_enaddr
/* Standard driver entry points. These can be static. */
static int fe_probe ( struct isa_device * );
static int fe_attach ( struct isa_device * );
static void fe_init ( int );
static int fe_ioctl ( struct ifnet *, int, caddr_t );
static void fe_start ( struct ifnet * );
static void fe_reset ( int );
static void fe_watchdog ( struct ifnet * );
/* Local functions. Order of declaration is confused. FIXME. */
static int fe_probe_fmv ( DEVICE *, struct fe_softc * );
static int fe_probe_ati ( DEVICE *, struct fe_softc * );
static void fe_init_ati ( struct fe_softc * );
static int fe_probe_gwy ( DEVICE *, struct fe_softc * );
#if NCARD > 0
static int fe_probe_mbh ( DEVICE *, struct fe_softc * );
static void fe_init_mbh ( struct fe_softc * );
static int fe_probe_tdk ( DEVICE *, struct fe_softc * );
#endif
static int fe_get_packet ( struct fe_softc *, u_short );
static void fe_stop ( int );
static void fe_tint ( struct fe_softc *, u_char );
static void fe_rint ( struct fe_softc *, u_char );
static void fe_xmit ( struct fe_softc * );
static void fe_emptybuffer ( struct fe_softc * );
static void fe_write_mbufs ( struct fe_softc *, struct mbuf * );
static struct fe_filter
fe_mcaf ( struct fe_softc * );
static int fe_hash ( u_char * );
static void fe_setmode ( struct fe_softc * );
static void fe_loadmar ( struct fe_softc * );
#if FE_DEBUG >= 1
static void fe_dump ( int, struct fe_softc *, char * );
#endif
/* Driver struct used in the config code. This must be public (external.) */
struct isa_driver fedriver =
{
fe_probe,
fe_attach,
"fe",
1 /* It's safe to mark as "sensitive" */
};
/*
* Fe driver specific constants which relate to 86960/86965.
*/
/* Interrupt masks */
#define FE_TMASK ( FE_D2_COLL16 | FE_D2_TXDONE )
#define FE_RMASK ( FE_D3_OVRFLO | FE_D3_CRCERR \
| FE_D3_ALGERR | FE_D3_SRTPKT | FE_D3_PKTRDY )
/* Maximum number of iterations for a receive interrupt. */
#define FE_MAX_RECV_COUNT ( ( 65536 - 2048 * 2 ) / 64 )
/*
* Maximum size of SRAM is 65536,
* minimum size of transmission buffer in fe is 2x2KB,
* and minimum amount of received packet including headers
* added by the chip is 64 bytes.
* Hence FE_MAX_RECV_COUNT is the upper limit for number
* of packets in the receive buffer.
*/
/*
* Routines to access contiguous I/O ports.
*/
static void
inblk ( struct fe_softc * sc, int offs, u_char * mem, int len )
{
while ( --len >= 0 ) {
*mem++ = inb( sc->ioaddr[ offs++ ] );
}
}
static void
outblk ( struct fe_softc * sc, int offs, u_char const * mem, int len )
{
while ( --len >= 0 ) {
outb( sc->ioaddr[ offs++ ], *mem++ );
}
}
/* PCCARD Support */
#if NCARD > 0
/*
* PC-Card (PCMCIA) specific code.
*/
static int feinit(struct pccard_devinfo *); /* init device */
static void feunload(struct pccard_devinfo *); /* Disable driver */
static int fe_card_intr(struct pccard_devinfo *); /* Interrupt handler */
static struct pccard_device fe_info = {
"fe",
feinit,
feunload,
fe_card_intr,
0, /* Attributes - presently unused */
&net_imask /* Interrupt mask for device */
/* XXX - Should this also include net_imask? */
};
DATA_SET(pccarddrv_set, fe_info);
/*
* Initialize the device - called from Slot manager.
*/
static int
feinit(struct pccard_devinfo *devi)
{
struct fe_softc *sc;
/* validate unit number. */
if (devi->isahd.id_unit >= NFE)
return (ENODEV);
/*
* Probe the device. If a value is returned,
* the device was found at the location.
*/
#if FE_DEBUG >= 2
printf("Start Probe\n");
#endif
/* Initialize "minimum" parts of our softc. */
sc = &fe_softc[devi->isahd.id_unit];
sc->sc_unit = devi->isahd.id_unit;
sc->iobase = devi->isahd.id_iobase;
/* Use Ethernet address got from CIS, if one is available. */
if ((devi->misc[0] & 0x03) == 0x00
&& (devi->misc[0] | devi->misc[1] | devi->misc[2]) != 0) {
/* Yes, it looks like a valid Ether address. */
bcopy(devi->misc, sc->sc_enaddr, ETHER_ADDR_LEN);
} else {
/* Indicate we have no Ether address in CIS. */
bzero(sc->sc_enaddr, ETHER_ADDR_LEN);
}
/* Probe supported PC card models. */
if (fe_probe_tdk(&devi->isahd, sc) == 0 &&
fe_probe_mbh(&devi->isahd, sc) == 0)
return (ENXIO);
#if FE_DEBUG >= 2
printf("Start attach\n");
#endif
if (fe_attach(&devi->isahd) == 0)
return (ENXIO);
return (0);
}
/*
* feunload - unload the driver and clear the table.
* XXX TODO:
* This is usually called when the card is ejected, but
* can be caused by a modunload of a controller driver.
* The idea is to reset the driver's view of the device
* and ensure that any driver entry points such as
* read and write do not hang.
*/
static void
feunload(struct pccard_devinfo *devi)
{
struct fe_softc *sc = &fe_softc[devi->isahd.id_unit];
printf("fe%d: unload\n", devi->isahd.id_unit);
fe_stop(devi->isahd.id_unit);
}
/*
* fe_card_intr - Shared interrupt called from
* front end of PC-Card handler.
*/
static int
fe_card_intr(struct pccard_devinfo *devi)
{
feintr(devi->isahd.id_unit);
return (1);
}
#endif /* NCARD > 0 */
/*
* Hardware probe routines.
*/
/* How and where to probe; to support automatic I/O address detection. */
struct fe_probe_list
{
int ( * probe ) ( DEVICE *, struct fe_softc * );
u_short const * addresses;
};
/* Lists of possible addresses. */
static u_short const fe_fmv_addr [] =
{ 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x300, 0x340, 0 };
static u_short const fe_ati_addr [] =
{ 0x240, 0x260, 0x280, 0x2A0, 0x300, 0x320, 0x340, 0x380, 0 };
static struct fe_probe_list const fe_probe_list [] =
{
{ fe_probe_fmv, fe_fmv_addr },
{ fe_probe_ati, fe_ati_addr },
{ fe_probe_gwy, NULL }, /* GWYs cannot be auto detected. */
{ NULL, NULL }
};
/*
* Determine if the device is present
*
* on entry:
* a pointer to an isa_device struct
* on exit:
* zero if device not found
* or number of i/o addresses used (if found)
*/
static int
fe_probe ( DEVICE * dev )
{
struct fe_softc * sc;
int u;
int nports;
struct fe_probe_list const * list;
u_short const * addr;
u_short single [ 2 ];
/* Initialize "minimum" parts of our softc. */
sc = &fe_softc[ dev->id_unit ];
sc->sc_unit = dev->id_unit;
/* Probe each possibility, one at a time. */
for ( list = fe_probe_list; list->probe != NULL; list++ ) {
if ( dev->id_iobase != NO_IOADDR ) {
/* Probe one specific address. */
single[ 0 ] = dev->id_iobase;
single[ 1 ] = 0;
addr = single;
} else if ( list->addresses != NULL ) {
/* Auto detect. */
addr = list->addresses;
} else {
/* We need a list of addresses to do auto detect. */
continue;
}
/* Probe all possible addresses for the board. */
while ( *addr != 0 ) {
/* See if the address is already in use. */
for ( u = 0; u < NFE; u++ ) {
if ( fe_softc[u].iobase == *addr ) break;
}
#if FE_DEBUG >= 3
if ( u == NFE ) {
log( LOG_INFO, "fe%d: probing %d at 0x%x\n",
sc->sc_unit, list - fe_probe_list, *addr );
} else if ( u == sc->sc_unit ) {
log( LOG_INFO, "fe%d: re-probing %d at 0x%x?\n",
sc->sc_unit, list - fe_probe_list, *addr );
} else {
log( LOG_INFO, "fe%d: skipping %d at 0x%x\n",
sc->sc_unit, list - fe_probe_list, *addr );
}
#endif
/* Probe the address if it is free. */
if ( u == NFE || u == sc->sc_unit ) {
/* Probe an address. */
sc->iobase = *addr;
nports = list->probe( dev, sc );
if ( nports > 0 ) {
/* Found. */
dev->id_iobase = *addr;
return ( nports );
}
sc->iobase = 0;
}
/* Try next. */
addr++;
}
}
/* Probe failed. */
return ( 0 );
}
/*
* Check for specific bits in specific registers have specific values.
*/
struct fe_simple_probe_struct
{
u_char port; /* Offset from the base I/O address. */
u_char mask; /* Bits to be checked. */
u_char bits; /* Values to be compared against. */
};
static int
fe_simple_probe ( struct fe_softc const * sc,
struct fe_simple_probe_struct const * sp )
{
struct fe_simple_probe_struct const * p;
for ( p = sp; p->mask != 0; p++ ) {
#if FE_DEBUG >=2
printf("Probe Port:%x,Value:%x,Mask:%x.Bits:%x\n",
p->port,inb(sc->ioaddr[ p->port]),p->mask,p->bits);
#endif
if ( ( inb( sc->ioaddr[ p->port ] ) & p->mask ) != p->bits )
{
return ( 0 );
}
}
return ( 1 );
}
/*
* Routines to read all bytes from the config EEPROM through MB86965A.
* I'm not sure what exactly I'm doing here... I was told just to follow
* the steps, and it worked. Could someone tell me why the following
* code works? (Or, why all similar codes I tried previously doesn't
* work.) FIXME.
*/
static void
fe_strobe_eeprom ( u_short bmpr16 )
{
/*
* We must guarantee 800ns (or more) interval to access slow
* EEPROMs. The following redundant code provides enough
* delay with ISA timing. (Even if the bus clock is "tuned.")
* Some modification will be needed on faster busses.
*/
outb( bmpr16, FE_B16_SELECT );
outb( bmpr16, FE_B16_SELECT );
outb( bmpr16, FE_B16_SELECT | FE_B16_CLOCK );
outb( bmpr16, FE_B16_SELECT | FE_B16_CLOCK );
outb( bmpr16, FE_B16_SELECT );
outb( bmpr16, FE_B16_SELECT );
}
static void
fe_read_eeprom ( struct fe_softc * sc, u_char * data )
{
u_short bmpr16 = sc->ioaddr[ FE_BMPR16 ];
u_short bmpr17 = sc->ioaddr[ FE_BMPR17 ];
u_char n, val, bit;
/* Read bytes from EEPROM; two bytes per an iteration. */
for ( n = 0; n < FE_EEPROM_SIZE / 2; n++ ) {
/* Reset the EEPROM interface. */
outb( bmpr16, 0x00 );
outb( bmpr17, 0x00 );
/* Start EEPROM access. */
outb( bmpr16, FE_B16_SELECT );
outb( bmpr17, FE_B17_DATA );
fe_strobe_eeprom( bmpr16 );
/* Pass the iteration count to the chip. */
val = 0x80 | n;
for ( bit = 0x80; bit != 0x00; bit >>= 1 ) {
outb( bmpr17, ( val & bit ) ? FE_B17_DATA : 0 );
fe_strobe_eeprom( bmpr16 );
}
outb( bmpr17, 0x00 );
/* Read a byte. */
val = 0;
for ( bit = 0x80; bit != 0x00; bit >>= 1 ) {
fe_strobe_eeprom( bmpr16 );
if ( inb( bmpr17 ) & FE_B17_DATA ) {
val |= bit;
}
}
*data++ = val;
/* Read one more byte. */
val = 0;
for ( bit = 0x80; bit != 0x00; bit >>= 1 ) {
fe_strobe_eeprom( bmpr16 );
if ( inb( bmpr17 ) & FE_B17_DATA ) {
val |= bit;
}
}
*data++ = val;
}
/* Reset the EEPROM interface, again. */
outb( bmpr16, 0x00 );
outb( bmpr17, 0x00 );
#if FE_DEBUG >= 3
/* Report what we got. */
data -= FE_EEPROM_SIZE;
log( LOG_INFO, "fe%d: EEPROM:"
" %02x%02x%02x%02x %02x%02x%02x%02x -"
" %02x%02x%02x%02x %02x%02x%02x%02x -"
" %02x%02x%02x%02x %02x%02x%02x%02x -"
" %02x%02x%02x%02x %02x%02x%02x%02x\n",
sc->sc_unit,
data[ 0], data[ 1], data[ 2], data[ 3],
data[ 4], data[ 5], data[ 6], data[ 7],
data[ 8], data[ 9], data[10], data[11],
data[12], data[13], data[14], data[15],
data[16], data[17], data[18], data[19],
data[20], data[21], data[22], data[23],
data[24], data[25], data[26], data[27],
data[28], data[29], data[30], data[31] );
#endif
}
/*
* Hardware (vendor) specific probe routines.
*/
/*
* Probe and initialization for Fujitsu FMV-180 series boards
*/
static int
fe_probe_fmv ( DEVICE * dev, struct fe_softc * sc )
{
int i, n;
static u_short const baseaddr [ 8 ] =
{ 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x300, 0x340 };
static u_short const irqmap [ 4 ] =
{ IRQ3, IRQ7, IRQ10, IRQ15 };
static struct fe_simple_probe_struct const probe_table [] = {
{ FE_DLCR2, 0x70, 0x00 },
{ FE_DLCR4, 0x08, 0x00 },
/* { FE_DLCR5, 0x80, 0x00 }, Doesn't work. */
{ FE_FMV0, 0x78, 0x50 }, /* ERRDY+PRRDY */
{ FE_FMV1, 0xB0, 0x00 }, /* FMV-183/184 has 0x48 bits. */
{ FE_FMV3, 0x7F, 0x00 },
#if 1
/*
* Test *vendor* part of the station address for Fujitsu.
* The test will gain reliability of probe process, but
* it rejects FMV-180 clone boards manufactured by other vendors.
* We have to turn the test off when such cards are made available.
*/
{ FE_FMV4, 0xFF, 0x00 },
{ FE_FMV5, 0xFF, 0x00 },
{ FE_FMV6, 0xFF, 0x0E },
#else
/*
* We can always verify the *first* 2 bits (in Ethernet
* bit order) are "no multicast" and "no local" even for
* unknown vendors.
*/
{ FE_FMV4, 0x03, 0x00 },
#endif
{ 0 }
};
/* "Hardware revision ID" */
int revision;
/*
* See if the specified address is possible for FMV-180 series.
*/
for ( i = 0; i < 8; i++ ) {
if ( baseaddr[ i ] == sc->iobase ) break;
}
if ( i == 8 ) return 0;
/* Setup an I/O address mapping table. */
for ( i = 0; i < MAXREGISTERS; i++ ) {
sc->ioaddr[ i ] = sc->iobase + i;
}
/* Simple probe. */
if ( !fe_simple_probe( sc, probe_table ) ) return 0;
/* Check if our I/O address matches config info. on EEPROM. */
n = ( inb( sc->ioaddr[ FE_FMV2 ] ) & FE_FMV2_IOS )
>> FE_FMV2_IOS_SHIFT;
if ( baseaddr[ n ] != sc->iobase ) {
#if 0
/* May not work on some revisions of the cards... FIXME. */
return 0;
#else
/* Just log the fact and see what happens... FIXME. */
log( LOG_WARNING, "fe%d: strange I/O config?\n", sc->sc_unit );
#endif
}
/* Find the "hardware revision." */
revision = inb( sc->ioaddr[ FE_FMV1 ] ) & FE_FMV1_REV;
/* Determine the card type. */
sc->typestr = NULL;
switch ( inb( sc->ioaddr[ FE_FMV0 ] ) & FE_FMV0_MEDIA ) {
case 0:
/* No interface? This doesn't seem to be an FMV-180... */
return 0;
case FE_FMV0_MEDIUM_T:
switch ( revision ) {
case 8:
sc->typestr = "FMV-183";
break;
case 12:
sc->typestr = "FMV-183 (on-board)";
break;
}
break;
case FE_FMV0_MEDIUM_T | FE_FMV0_MEDIUM_5:
switch ( revision ) {
case 0:
sc->typestr = "FMV-181";
break;
case 1:
sc->typestr = "FMV-181A";
break;
}
break;
case FE_FMV0_MEDIUM_2:
switch ( revision ) {
case 8:
sc->typestr = "FMV-184 (CSR = 2)";
break;
}
break;
case FE_FMV0_MEDIUM_5:
switch ( revision ) {
case 8:
sc->typestr = "FMV-184 (CSR = 1)";
break;
}
break;
case FE_FMV0_MEDIUM_2 | FE_FMV0_MEDIUM_5:
switch ( revision ) {
case 0:
sc->typestr = "FMV-182";
break;
case 1:
sc->typestr = "FMV-182A";
break;
case 8:
sc->typestr = "FMV-184 (CSR = 3)";
break;
}
break;
}
if ( sc->typestr == NULL ) {
/* Unknown card type... Hope the driver works. */
sc->typestr = "unknown FMV-180 version";
log( LOG_WARNING, "fe%d: %s: %x-%x-%x-%x\n",
sc->sc_unit, sc->typestr,
inb( sc->ioaddr[ FE_FMV0 ] ),
inb( sc->ioaddr[ FE_FMV1 ] ),
inb( sc->ioaddr[ FE_FMV2 ] ),
inb( sc->ioaddr[ FE_FMV3 ] ) );
}
/*
* An FMV-180 has been proved.
* Determine which IRQ to be used.
*
* In this version, we give a priority to the kernel config file.
* If the EEPROM and config don't match, say it to the user for
* an attention.
*/
n = ( inb( sc->ioaddr[ FE_FMV2 ] ) & FE_FMV2_IRS )
>> FE_FMV2_IRS_SHIFT;
if ( dev->id_irq == NO_IRQ ) {
/* Just use the probed value. */
dev->id_irq = irqmap[ n ];
} else if ( dev->id_irq != irqmap[ n ] ) {
/* Don't match. */
log( LOG_WARNING,
"fe%d: check IRQ in config; it may be incorrect\n",
sc->sc_unit );
}
/*
* Initialize constants in the per-line structure.
*/
/* Get our station address from EEPROM. */
inblk( sc, FE_FMV4, sc->sc_enaddr, ETHER_ADDR_LEN );
/* Make sure we got a valid station address. */
if ( ( sc->sc_enaddr[ 0 ] & 0x03 ) != 0x00
|| ( sc->sc_enaddr[ 0 ] == 0x00
&& sc->sc_enaddr[ 1 ] == 0x00
&& sc->sc_enaddr[ 2 ] == 0x00 ) ) return 0;
/*
* Register values which (may) depend on board design.
*
* Program the 86960 as follows:
* SRAM: 32KB, 100ns, byte-wide access.
* Transmission buffer: 4KB x 2.
* System bus interface: 16 bits.
*/
sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL;
sc->proto_dlcr5 = 0;
sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB
| FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns;
sc->proto_dlcr7 = FE_D7_BYTSWP_LH | FE_D7_IDENT_EC;
sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO;
/*
* Minimum initialization of the hardware.
* We write into registers; hope I/O ports have no
* overlap with other boards.
*/
/* Initialize ASIC. */
outb( sc->ioaddr[ FE_FMV3 ], 0 );
outb( sc->ioaddr[ FE_FMV10 ], 0 );
/* Initialize 86960. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Disable all interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], 0 );
outb( sc->ioaddr[ FE_DLCR3 ], 0 );
/* "Refresh" hardware configuration. FIXME. */
outb( sc->ioaddr[ FE_FMV2 ], inb( sc->ioaddr[ FE_FMV2 ] ) );
/* Turn the "master interrupt control" flag of ASIC on. */
outb( sc->ioaddr[ FE_FMV3 ], FE_FMV3_IRQENB );
/*
* That's all. FMV-180 occupies 32 I/O addresses, by the way.
*/
return 32;
}
/*
* Probe and initialization for Allied-Telesis AT1700/RE2000 series.
*/
static int
fe_probe_ati ( DEVICE * dev, struct fe_softc * sc )
{
int i, n;
u_char eeprom [ FE_EEPROM_SIZE ];
u_char save16, save17;
static u_short const baseaddr [ 8 ] =
{ 0x260, 0x280, 0x2A0, 0x240, 0x340, 0x320, 0x380, 0x300 };
static u_short const irqmaps [ 4 ][ 4 ] =
{
{ IRQ3, IRQ4, IRQ5, IRQ9 },
{ IRQ10, IRQ11, IRQ12, IRQ15 },
{ IRQ3, IRQ11, IRQ5, IRQ15 },
{ IRQ10, IRQ11, IRQ14, IRQ15 },
};
static struct fe_simple_probe_struct const probe_table [] = {
{ FE_DLCR2, 0x70, 0x00 },
{ FE_DLCR4, 0x08, 0x00 },
{ FE_DLCR5, 0x80, 0x00 },
#if 0
{ FE_BMPR16, 0x1B, 0x00 },
{ FE_BMPR17, 0x7F, 0x00 },
#endif
{ 0 }
};
/* Assume we have 86965 and no need to restore these. */
save16 = 0;
save17 = 0;
#if FE_DEBUG >= 3
log( LOG_INFO, "fe%d: probe (0x%x) for ATI\n",
sc->sc_unit, sc->iobase );
fe_dump( LOG_INFO, sc, NULL );
#endif
/*
* See if the specified address is possible for MB86965A JLI mode.
*/
for ( i = 0; i < 8; i++ ) {
if ( baseaddr[ i ] == sc->iobase ) break;
}
if ( i == 8 ) goto NOTFOUND;
/* Setup an I/O address mapping table. */
for ( i = 0; i < MAXREGISTERS; i++ ) {
sc->ioaddr[ i ] = sc->iobase + i;
}
/*
* We should test if MB86965A is on the base address now.
* Unfortunately, it is very hard to probe it reliably, since
* we have no way to reset the chip under software control.
* On cold boot, we could check the "signature" bit patterns
* described in the Fujitsu document. On warm boot, however,
* we can predict almost nothing about register values.
*/
if ( !fe_simple_probe( sc, probe_table ) ) goto NOTFOUND;
/* Check if our I/O address matches config info on 86965. */
n = ( inb( sc->ioaddr[ FE_BMPR19 ] ) & FE_B19_ADDR )
>> FE_B19_ADDR_SHIFT;
if ( baseaddr[ n ] != sc->iobase ) goto NOTFOUND;
/*
* We are now almost sure we have an AT1700 at the given
* address. So, read EEPROM through 86965. We have to write
* into LSI registers to read from EEPROM. I want to avoid it
* at this stage, but I cannot test the presence of the chip
* any further without reading EEPROM. FIXME.
*/
save16 = inb( sc->ioaddr[ FE_BMPR16 ] );
save17 = inb( sc->ioaddr[ FE_BMPR17 ] );
fe_read_eeprom( sc, eeprom );
/* Make sure the EEPROM is turned off. */
outb( sc->ioaddr[ FE_BMPR16 ], 0 );
outb( sc->ioaddr[ FE_BMPR17 ], 0 );
/* Make sure that config info in EEPROM and 86965 agree. */
if ( eeprom[ FE_EEPROM_CONF ] != inb( sc->ioaddr[ FE_BMPR19 ] ) ) {
goto NOTFOUND;
}
/*
* The following model identification codes are stolen from
* from the NetBSD port of the fe driver. My reviewers
* suggested minor revision.
*/
/* Determine the card type. */
switch (eeprom[FE_ATI_EEP_MODEL]) {
case FE_ATI_MODEL_AT1700T:
sc->typestr = "AT-1700T/RE2001";
break;
case FE_ATI_MODEL_AT1700BT:
sc->typestr = "AT-1700BT/RE2003";
break;
case FE_ATI_MODEL_AT1700FT:
sc->typestr = "AT-1700FT/RE2009";
break;
case FE_ATI_MODEL_AT1700AT:
sc->typestr = "AT-1700AT/RE2005";
break;
default:
sc->typestr = "unknown AT-1700/RE2000 ?";
break;
}
/*
* Try to determine IRQ settings.
* Different models use different ranges of IRQs.
*/
if ( dev->id_irq == NO_IRQ ) {
n = ( inb( sc->ioaddr[ FE_BMPR19 ] ) & FE_B19_IRQ )
>> FE_B19_IRQ_SHIFT;
switch ( eeprom[ FE_ATI_EEP_REVISION ] & 0xf0 ) {
case 0x30:
dev->id_irq = irqmaps[ 3 ][ n ];
break;
case 0x10:
case 0x50:
dev->id_irq = irqmaps[ 2 ][ n ];
break;
case 0x40:
case 0x60:
if ( eeprom[ FE_ATI_EEP_MAGIC ] & 0x04 ) {
dev->id_irq = irqmaps[ 1 ][ n ];
} else {
dev->id_irq = irqmaps[ 0 ][ n ];
}
break;
default:
dev->id_irq = irqmaps[ 0 ][ n ];
break;
}
}
/*
* Initialize constants in the per-line structure.
*/
/* Get our station address from EEPROM. */
bcopy( eeprom + FE_ATI_EEP_ADDR, sc->sc_enaddr, ETHER_ADDR_LEN );
#if 1
/*
* This test doesn't work well for AT1700 look-alike by
* other vendors.
*/
/* Make sure the vendor part is for Allied-Telesis. */
if ( sc->sc_enaddr[ 0 ] != 0x00
|| sc->sc_enaddr[ 1 ] != 0x00
|| sc->sc_enaddr[ 2 ] != 0xF4 ) return 0;
#else
/* Make sure we got a valid station address. */
if ( ( sc->sc_enaddr[ 0 ] & 0x03 ) != 0x00
|| ( sc->sc_enaddr[ 0 ] == 0x00
&& sc->sc_enaddr[ 1 ] == 0x00
&& sc->sc_enaddr[ 2 ] == 0x00 ) ) return 0;
#endif
/*
* Program the 86960 as follows:
* SRAM: 32KB, 100ns, byte-wide access.
* Transmission buffer: 4KB x 2.
* System bus interface: 16 bits.
*/
sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL; /* FIXME */
sc->proto_dlcr5 = 0;
sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB
| FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns;
sc->proto_dlcr7 = FE_D7_BYTSWP_LH | FE_D7_IDENT_EC;
#if 0 /* XXXX Should we use this? FIXME. */
sc->proto_bmpr13 = eeprom[ FE_ATI_EEP_MEDIA ];
#else
sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO;
#endif
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "ATI found" );
#endif
/* Setup hooks. This may solves a nasty bug. FIXME. */
sc->init = fe_init_ati;
/* Initialize 86965. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Disable all interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], 0 );
outb( sc->ioaddr[ FE_DLCR3 ], 0 );
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "end of fe_probe_ati()" );
#endif
/*
* That's all. AT1700 occupies 32 I/O addresses, by the way.
*/
return 32;
NOTFOUND:
/*
* We have no AT1700 at a given address.
* Restore BMPR16 and BMPR17 if we have destroyed them,
* hoping that the hardware on the address didn't get
* bad side effect.
*/
if ( save16 != 0 | save17 != 0 ) {
outb( sc->ioaddr[ FE_BMPR16 ], save16 );
outb( sc->ioaddr[ FE_BMPR17 ], save17 );
}
return ( 0 );
}
/* ATI specific initialization routine. */
static void
fe_init_ati ( struct fe_softc * sc )
{
/*
* I've told that the following operation "Resets" the chip.
* Hope this solve a bug which hangs up the driver under
* heavy load... FIXME.
*/
/* Minimal initialization of 86965. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* "Reset" by wrting into an undocument register location. */
outb( sc->ioaddr[ 0x1F ], 0 );
/* How long do we have to wait after the reset? FIXME. */
DELAY( 300 );
}
/*
* Probe and initialization for Gateway Communications' old cards.
*/
static int
fe_probe_gwy ( DEVICE * dev, struct fe_softc * sc )
{
int i,type;
static struct fe_simple_probe_struct probe_table [] = {
{ FE_DLCR2, 0x70, 0x00 },
{ FE_DLCR4, 0x08, 0x00 },
{ FE_DLCR7, 0xC0, 0x00 },
/*
* Test *vendor* part of the address for Gateway.
* This test is essential to identify Gateway's cards.
* We shuld define some symbolic names for the
* following offsets. FIXME.
*/
{ 0x18, 0xFF, 0x00 },
{ 0x19, 0xFF, 0x00 },
{ 0x1A, 0xFF, 0x61 },
{ 0 }
};
/*
* We need explicit IRQ and supported address.
* I'm not sure which address and IRQ is possible for Gateway
* Ethernet family. The following accepts everything. FIXME.
*/
if ( dev->id_irq == NO_IRQ || ( sc->iobase & ~0x3E0 ) != 0 ) {
return ( 0 );
}
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "top of probe" );
#endif
/* Setup an I/O address mapping table. */
for ( i = 0; i < MAXREGISTERS; i++ ) {
sc->ioaddr[ i ] = sc->iobase + i;
}
/* See if the card is on its address. */
if ( !fe_simple_probe( sc, probe_table ) ) {
return 0;
}
/* Determine the card type. */
sc->typestr = "Gateway Ethernet w/ Fujitsu chipset";
/* Get our station address from EEPROM. */
inblk( sc, 0x18, sc->sc_enaddr, ETHER_ADDR_LEN );
/*
* Program the 86960 as follows:
* SRAM: 16KB, 100ns, byte-wide access.
* Transmission buffer: 2KB x 2.
* System bus interface: 16 bits.
* Make sure to clear out ID bits in DLCR7
* (They actually are Encoder/Decoder control in NICE.)
*/
sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL;
sc->proto_dlcr5 = 0;
sc->proto_dlcr6 = FE_D6_BUFSIZ_16KB | FE_D6_TXBSIZ_2x2KB
| FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns;
sc->proto_dlcr7 = FE_D7_BYTSWP_LH;
sc->proto_bmpr13 = 0;
/* Minimal initialization of 86960. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Disable all interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], 0 );
outb( sc->ioaddr[ FE_DLCR3 ], 0 );
/* That's all. The card occupies 32 I/O addresses, as always. */
return 32;
}
#if NCARD > 0
/*
* Probe and initialization for Fujitsu MBH10302 PCMCIA Ethernet interface.
* Note that this is for 10302 only; MBH10304 is handled by fe_probe_tdk().
*/
static int
fe_probe_mbh ( DEVICE * dev, struct fe_softc * sc )
{
int i,type;
static struct fe_simple_probe_struct probe_table [] = {
{ FE_DLCR0, 0x09, 0x00 },
{ FE_DLCR2, 0x79, 0x00 },
{ FE_DLCR4, 0x08, 0x00 },
{ FE_DLCR6, 0xFF, 0xB6 },
/*
* The following location has the first byte of the card's
* Ethernet (MAC) address.
* We can always verify the *first* 2 bits (in Ethernet
* bit order) are "global" and "unicast" for any vendors'.
*/
{ FE_MBH10, 0x03, 0x00 },
/* Just a gap? Seems reliable, anyway. */
{ 0x12, 0xFF, 0x00 },
{ 0x13, 0xFF, 0x00 },
{ 0x14, 0xFF, 0x00 },
{ 0x15, 0xFF, 0x00 },
{ 0x16, 0xFF, 0x00 },
{ 0x17, 0xFF, 0x00 },
#if 0
{ 0x18, 0xFF, 0xFF },
{ 0x19, 0xFF, 0xFF },
#endif
{ 0 }
};
/*
* We need explicit IRQ and supported address.
*/
if ( dev->id_irq == NO_IRQ || ( sc->iobase & ~0x3E0 ) != 0 ) {
return ( 0 );
}
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "top of probe" );
#endif
/* Setup an I/O address mapping table. */
for ( i = 0; i < MAXREGISTERS; i++ ) {
sc->ioaddr[ i ] = sc->iobase + i;
}
/*
* See if MBH10302 is on its address.
* I'm not sure the following probe code works. FIXME.
*/
if ( !fe_simple_probe( sc, probe_table ) ) return 0;
/* Determine the card type. */
sc->typestr = "MBH10302 (PCMCIA)";
/*
* Initialize constants in the per-line structure.
*/
/* Get our station address from EEPROM. */
inblk( sc, FE_MBH10, sc->sc_enaddr, ETHER_ADDR_LEN );
/* Make sure we got a valid station address. */
if ( sc->sc_enaddr[ 0 ] == 0x00
&& sc->sc_enaddr[ 1 ] == 0x00
&& sc->sc_enaddr[ 2 ] == 0x00 ) return 0;
/*
* Program the 86960 as follows:
* SRAM: 32KB, 100ns, byte-wide access.
* Transmission buffer: 4KB x 2.
* System bus interface: 16 bits.
*/
sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL;
sc->proto_dlcr5 = 0;
sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB
| FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns;
sc->proto_dlcr7 = FE_D7_BYTSWP_LH | FE_D7_IDENT_NICE;
sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO;
/* Setup hooks. We need a special initialization procedure. */
sc->init = fe_init_mbh;
/*
* Minimum initialization.
*/
/* Minimal initialization of 86960. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Disable all interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], 0 );
outb( sc->ioaddr[ FE_DLCR3 ], 0 );
#if 1 /* FIXME. */
/* Initialize system bus interface and encoder/decoder operation. */
outb( sc->ioaddr[ FE_MBH0 ], FE_MBH0_MAGIC | FE_MBH0_INTR_DISABLE );
#endif
/*
* That's all. MBH10302 occupies 32 I/O addresses, by the way.
*/
return 32;
}
/* MBH specific initialization routine. */
static void
fe_init_mbh ( struct fe_softc * sc )
{
/* Minimal initialization of 86960. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Disable all interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], 0 );
outb( sc->ioaddr[ FE_DLCR3 ], 0 );
/* Enable master interrupt flag. */
outb( sc->ioaddr[ FE_MBH0 ], FE_MBH0_MAGIC | FE_MBH0_INTR_ENABLE );
}
/*
* Probe and initialization for TDK/CONTEC PCMCIA Ethernet interface.
* by MASUI Kenji <masui@cs.titech.ac.jp>
*
* (Contec uses TDK Ethenet chip -- hosokawa)
*
* This version of fe_probe_tdk has been rewrote to handle
* *generic* PC card implementation of Fujitsu MB8696x and compatibles.
* The name _tdk is just for a historical reason. <seki> :-)
*/
static int
fe_probe_tdk ( DEVICE * dev, struct fe_softc * sc )
{
int i;
static struct fe_simple_probe_struct probe_table [] = {
{ FE_DLCR2, 0x70, 0x00 },
{ FE_DLCR4, 0x08, 0x00 },
/* { FE_DLCR5, 0x80, 0x00 }, Does not work well. */
{ 0 }
};
/* We need an IRQ. */
if ( dev->id_irq == NO_IRQ ) {
return ( 0 );
}
/* Generic driver needs Ethernet address taken from CIS. */
if (sc->arpcom.ac_enaddr[0] == 0
&& sc->arpcom.ac_enaddr[1] == 0
&& sc->arpcom.ac_enaddr[2] == 0) {
return 0;
}
/* Setup an I/O address mapping table; we need only 16 ports. */
for (i = 0; i < 16; i++) {
sc->ioaddr[i] = sc->iobase + i;
}
/* Fill unused slots with a safe address. */
for (i = 16; i < MAXREGISTERS; i++) {
sc->ioaddr[i] = sc->iobase;
}
/*
* See if C-NET(PC)C is on its address.
*/
if ( !fe_simple_probe( sc, probe_table ) ) return 0;
/* Determine the card type. */
sc->typestr = "Generic MB8696x Ethernet (PCMCIA)";
/*
* Initialize constants in the per-line structure.
*/
/* The station address *must*be* already in sc_enaddr;
Make sure we got a valid station address. */
if ( ( sc->sc_enaddr[ 0 ] & 0x03 ) != 0x00
|| ( sc->sc_enaddr[ 0 ] == 0x00
&& sc->sc_enaddr[ 1 ] == 0x00
&& sc->sc_enaddr[ 2 ] == 0x00 ) ) return 0;
/*
* Program the 86965 as follows:
* SRAM: 32KB, 100ns, byte-wide access.
* Transmission buffer: 4KB x 2.
* System bus interface: 16 bits.
* XXX: Should we remove IDENT_NICE from DLCR7? Or,
* even add IDENT_EC instead? FIXME.
*/
sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL;
sc->proto_dlcr5 = 0;
sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB
| FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns;
sc->proto_dlcr7 = FE_D7_BYTSWP_LH | FE_D7_IDENT_NICE;
sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO;
/* Minimul initialization of 86960. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Disable all interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], 0 );
outb( sc->ioaddr[ FE_DLCR3 ], 0 );
/*
* That's all. C-NET(PC)C occupies 16 I/O addresses.
*
* Some PC cards (e.g., TDK and Contec) have 16 I/O addresses,
* while some others (e.g., Fujitsu) have 32. Fortunately,
* this generic driver never accesses latter 16 ports in 32
* ports cards. So, we can assume the *generic* PC cards
* always have 16 ports.
*
* Moreover, PC card probe is isolated from ISA probe, and PC
* card probe routine doesn't use "# of ports" returned by this
* function. 16 v.s. 32 is not important now.
*/
return 16;
}
#endif /* NCARD > 0 */
/*
* Install interface into kernel networking data structures
*/
static int
fe_attach ( DEVICE * dev )
{
#if NCARD > 0
static int already_ifattach[NFE];
#endif
struct fe_softc *sc = &fe_softc[dev->id_unit];
/*
* Initialize ifnet structure
*/
sc->sc_if.if_softc = sc;
sc->sc_if.if_unit = sc->sc_unit;
sc->sc_if.if_name = "fe";
sc->sc_if.if_output = ether_output;
sc->sc_if.if_start = fe_start;
sc->sc_if.if_ioctl = fe_ioctl;
sc->sc_if.if_watchdog = fe_watchdog;
/*
* Set default interface flags.
*/
sc->sc_if.if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
/*
* Set maximum size of output queue, if it has not been set.
* It is done here as this driver may be started after the
* system initialization (i.e., the interface is PCMCIA.)
*
* I'm not sure this is really necessary, but, even if it is,
* it should be done somewhere else, e.g., in if_attach(),
* since it must be a common workaround for all network drivers.
* FIXME.
*/
if ( sc->sc_if.if_snd.ifq_maxlen == 0 ) {
sc->sc_if.if_snd.ifq_maxlen = ifqmaxlen;
}
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "attach()" );
#endif
#if FE_SINGLE_TRANSMISSION
/* Override txb config to allocate minimum. */
sc->proto_dlcr6 &= ~FE_D6_TXBSIZ
sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB;
#endif
/* Modify hardware config if it is requested. */
if ( dev->id_flags & FE_FLAGS_OVERRIDE_DLCR6 ) {
sc->proto_dlcr6 = dev->id_flags & FE_FLAGS_DLCR6_VALUE;
}
/* Find TX buffer size, based on the hardware dependent proto. */
switch ( sc->proto_dlcr6 & FE_D6_TXBSIZ ) {
case FE_D6_TXBSIZ_2x2KB: sc->txb_size = 2048; break;
case FE_D6_TXBSIZ_2x4KB: sc->txb_size = 4096; break;
case FE_D6_TXBSIZ_2x8KB: sc->txb_size = 8192; break;
default:
/* Oops, we can't work with single buffer configuration. */
#if FE_DEBUG >= 2
log( LOG_WARNING, "fe%d: strange TXBSIZ config; fixing\n",
sc->sc_unit );
#endif
sc->proto_dlcr6 &= ~FE_D6_TXBSIZ;
sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB;
sc->txb_size = 2048;
break;
}
/* Attach and stop the interface. */
#if NCARD > 0
if (already_ifattach[dev->id_unit] != 1) {
if_attach(&sc->sc_if);
already_ifattach[dev->id_unit] = 1;
}
#else
if_attach(&sc->sc_if);
#endif
fe_stop(sc->sc_unit); /* This changes the state to IDLE. */
ether_ifattach(&sc->sc_if);
/* Print additional info when attached. */
printf( "fe%d: address %6D, type %s\n", sc->sc_unit,
sc->sc_enaddr, ":" , sc->typestr );
#if FE_DEBUG >= 3
{
int buf, txb, bbw, sbw, ram;
buf = txb = bbw = sbw = ram = -1;
switch ( sc->proto_dlcr6 & FE_D6_BUFSIZ ) {
case FE_D6_BUFSIZ_8KB: buf = 8; break;
case FE_D6_BUFSIZ_16KB: buf = 16; break;
case FE_D6_BUFSIZ_32KB: buf = 32; break;
case FE_D6_BUFSIZ_64KB: buf = 64; break;
}
switch ( sc->proto_dlcr6 & FE_D6_TXBSIZ ) {
case FE_D6_TXBSIZ_2x2KB: txb = 2; break;
case FE_D6_TXBSIZ_2x4KB: txb = 4; break;
case FE_D6_TXBSIZ_2x8KB: txb = 8; break;
}
switch ( sc->proto_dlcr6 & FE_D6_BBW ) {
case FE_D6_BBW_BYTE: bbw = 8; break;
case FE_D6_BBW_WORD: bbw = 16; break;
}
switch ( sc->proto_dlcr6 & FE_D6_SBW ) {
case FE_D6_SBW_BYTE: sbw = 8; break;
case FE_D6_SBW_WORD: sbw = 16; break;
}
switch ( sc->proto_dlcr6 & FE_D6_SRAM ) {
case FE_D6_SRAM_100ns: ram = 100; break;
case FE_D6_SRAM_150ns: ram = 150; break;
}
printf( "fe%d: SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n",
sc->sc_unit, buf, bbw, ram, txb, sbw );
}
#endif
#if NBPFILTER > 0
/* If BPF is in the kernel, call the attach for it. */
bpfattach( &sc->sc_if, DLT_EN10MB, sizeof(struct ether_header));
#endif
return 1;
}
/*
* Reset interface.
*/
static void
fe_reset ( int unit )
{
/*
* Stop interface and re-initialize.
*/
fe_stop(unit);
fe_init(unit);
}
/*
* Stop everything on the interface.
*
* All buffered packets, both transmitting and receiving,
* if any, will be lost by stopping the interface.
*/
static void
fe_stop ( int unit )
{
struct fe_softc *sc = &fe_softc[unit];
int s;
s = splimp();
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "stop()" );
#endif
/* Disable interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], 0x00 );
outb( sc->ioaddr[ FE_DLCR3 ], 0x00 );
/* Stop interface hardware. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Clear all interrupt status. */
outb( sc->ioaddr[ FE_DLCR0 ], 0xFF );
outb( sc->ioaddr[ FE_DLCR1 ], 0xFF );
/* Put the chip in stand-by mode. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR7 ], sc->proto_dlcr7 | FE_D7_POWER_DOWN );
DELAY( 200 );
/* Reset transmitter variables and interface flags. */
sc->sc_if.if_flags &= ~( IFF_OACTIVE | IFF_RUNNING );
sc->sc_if.if_timer = 0;
sc->txb_free = sc->txb_size;
sc->txb_count = 0;
sc->txb_sched = 0;
/* MAR loading can be delayed. */
sc->filter_change = 0;
/* Update config status also. */
/* Call a hook. */
if ( sc->stop ) sc->stop( sc );
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "end of stop()" );
#endif
(void) splx(s);
}
/*
* Device timeout/watchdog routine. Entered if the device neglects to
* generate an interrupt after a transmit has been started on it.
*/
static void
fe_watchdog ( struct ifnet *ifp )
{
struct fe_softc *sc = (struct fe_softc *)ifp;
#if FE_DEBUG >= 1
/* A "debug" message. */
log( LOG_ERR, "fe%d: transmission timeout (%d+%d)%s\n",
ifp->if_unit, sc->txb_sched, sc->txb_count,
( ifp->if_flags & IFF_UP ) ? "" : " when down" );
if ( sc->sc_if.if_opackets == 0 && sc->sc_if.if_ipackets == 0 ) {
log( LOG_WARNING, "fe%d: wrong IRQ setting in config?\n",
ifp->if_unit );
}
#endif
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, NULL );
#endif
/* Record how many packets are lost by this accident. */
ifp->if_oerrors += sc->txb_sched + sc->txb_count;
/* Put the interface into known initial state. */
if ( ifp->if_flags & IFF_UP ) {
fe_reset( ifp->if_unit );
} else {
fe_stop( ifp->if_unit );
}
}
/*
* Initialize device.
*/
static void
fe_init ( int unit )
{
struct fe_softc *sc = &fe_softc[unit];
int i, s;
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "init()" );
#endif
/* We need an address. */
if (TAILQ_EMPTY(&sc->sc_if.if_addrhead)) { /* XXX unlikely */
#if FE_DEBUG >= 1
log( LOG_ERR, "fe%d: init() without any address\n",
sc->sc_unit );
#endif
return;
}
#if FE_DEBUG >= 1
/*
* Make sure we have a valid station address.
* The following test is applicable for any Ethernet interfaces.
* It can be done in somewhere common to all of them. FIXME.
*/
if ( ( sc->sc_enaddr[ 0 ] & 0x01 ) != 0
|| ( sc->sc_enaddr[ 0 ] == 0x00
&& sc->sc_enaddr[ 1 ] == 0x00
&& sc->sc_enaddr[ 2 ] == 0x00 ) ) {
log( LOG_ERR, "fe%d: invalid station address (%6D)\n",
sc->sc_unit, sc->sc_enaddr, ":" );
return;
}
#endif
/* Start initializing 86960. */
s = splimp();
/* Call a hook. */
if ( sc->init ) sc->init( sc );
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "after init hook" );
#endif
/*
* Make sure to disable the chip, also.
* This may also help re-programming the chip after
* hot insertion of PCMCIAs.
*/
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Power up the chip and select register bank for DLCRs. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR7 ],
sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP );
DELAY( 200 );
/* Feed the station address. */
outblk( sc, FE_DLCR8, sc->sc_enaddr, ETHER_ADDR_LEN );
/* Clear multicast address filter to receive nothing. */
outb( sc->ioaddr[ FE_DLCR7 ],
sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP );
outblk( sc, FE_MAR8, fe_filter_nothing.data, FE_FILTER_LEN );
/* Select the BMPR bank for runtime register access. */
outb( sc->ioaddr[ FE_DLCR7 ],
sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP );
/* Initialize registers. */
outb( sc->ioaddr[ FE_DLCR0 ], 0xFF ); /* Clear all bits. */
outb( sc->ioaddr[ FE_DLCR1 ], 0xFF ); /* ditto. */
outb( sc->ioaddr[ FE_DLCR2 ], 0x00 );
outb( sc->ioaddr[ FE_DLCR3 ], 0x00 );
outb( sc->ioaddr[ FE_DLCR4 ], sc->proto_dlcr4 );
outb( sc->ioaddr[ FE_DLCR5 ], sc->proto_dlcr5 );
outb( sc->ioaddr[ FE_BMPR10 ], 0x00 );
outb( sc->ioaddr[ FE_BMPR11 ], FE_B11_CTRL_SKIP | FE_B11_MODE1 );
outb( sc->ioaddr[ FE_BMPR12 ], 0x00 );
outb( sc->ioaddr[ FE_BMPR13 ], sc->proto_bmpr13 );
outb( sc->ioaddr[ FE_BMPR14 ], 0x00 );
outb( sc->ioaddr[ FE_BMPR15 ], 0x00 );
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "just before enabling DLC" );
#endif
/* Enable interrupts. */
outb( sc->ioaddr[ FE_DLCR2 ], FE_TMASK );
outb( sc->ioaddr[ FE_DLCR3 ], FE_RMASK );
/* Enable transmitter and receiver. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_ENABLE );
DELAY( 200 );
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "just after enabling DLC" );
#endif
/*
* Make sure to empty the receive buffer.
*
* This may be redundant, but *if* the receive buffer were full
* at this point, then the driver would hang. I have experienced
* some strange hang-up just after UP. I hope the following
* code solve the problem.
*
* I have changed the order of hardware initialization.
* I think the receive buffer cannot have any packets at this
* point in this version. The following code *must* be
* redundant now. FIXME.
*
* I've heard a rumore that on some PC card implementation of
* 8696x, the receive buffer can have some data at this point.
* The following message helps discovering the fact. FIXME.
*/
if ( !( inb( sc->ioaddr[ FE_DLCR5 ] ) & FE_D5_BUFEMP ) ) {
log( LOG_WARNING,
"fe%d: receive buffer has some data after reset\n",
sc->sc_unit );
fe_emptybuffer( sc );
}
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "after ERB loop" );
#endif
/* Do we need this here? Actually, no. I must be paranoia. */
outb( sc->ioaddr[ FE_DLCR0 ], 0xFF ); /* Clear all bits. */
outb( sc->ioaddr[ FE_DLCR1 ], 0xFF ); /* ditto. */
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "after FIXME" );
#endif
/* Set 'running' flag, because we are now running. */
sc->sc_if.if_flags |= IFF_RUNNING;
/*
* At this point, the interface is running properly,
* except that it receives *no* packets. we then call
* fe_setmode() to tell the chip what packets to be
* received, based on the if_flags and multicast group
* list. It completes the initialization process.
*/
fe_setmode( sc );
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "after setmode" );
#endif
/* ...and attempt to start output queued packets. */
fe_start( &sc->sc_if );
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, "init() done" );
#endif
(void) splx(s);
}
/*
* This routine actually starts the transmission on the interface
*/
static void
fe_xmit ( struct fe_softc * sc )
{
/*
* Set a timer just in case we never hear from the board again.
* We use longer timeout for multiple packet transmission.
* I'm not sure this timer value is appropriate. FIXME.
*/
sc->sc_if.if_timer = 1 + sc->txb_count;
/* Update txb variables. */
sc->txb_sched = sc->txb_count;
sc->txb_count = 0;
sc->txb_free = sc->txb_size;
sc->tx_excolls = 0;
/* Start transmitter, passing packets in TX buffer. */
outb( sc->ioaddr[ FE_BMPR10 ], sc->txb_sched | FE_B10_START );
}
/*
* 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)
*/
void
fe_start ( struct ifnet *ifp )
{
struct fe_softc *sc = ifp->if_softc;
struct mbuf *m;
#if FE_DEBUG >= 1
/* Just a sanity check. */
if ( ( sc->txb_count == 0 ) != ( sc->txb_free == sc->txb_size ) ) {
/*
* Txb_count and txb_free co-works to manage the
* transmission buffer. Txb_count keeps track of the
* used potion of the buffer, while txb_free does unused
* potion. So, as long as the driver runs properly,
* txb_count is zero if and only if txb_free is same
* as txb_size (which represents whole buffer.)
*/
log( LOG_ERR, "fe%d: inconsistent txb variables (%d, %d)\n",
sc->sc_unit, sc->txb_count, sc->txb_free );
/*
* So, what should I do, then?
*
* We now know txb_count and txb_free contradicts. We
* cannot, however, tell which is wrong. More
* over, we cannot peek 86960 transmission buffer or
* reset the transmission buffer. (In fact, we can
* reset the entire interface. I don't want to do it.)
*
* If txb_count is incorrect, leaving it as-is will cause
* sending of garbage after next interrupt. We have to
* avoid it. Hence, we reset the txb_count here. If
* txb_free was incorrect, resetting txb_count just loose
* some packets. We can live with it.
*/
sc->txb_count = 0;
}
#endif
#if FE_DEBUG >= 1
/*
* First, see if there are buffered packets and an idle
* transmitter - should never happen at this point.
*/
if ( ( sc->txb_count > 0 ) && ( sc->txb_sched == 0 ) ) {
log( LOG_ERR,
"fe%d: transmitter idle with %d buffered packets\n",
sc->sc_unit, sc->txb_count );
fe_xmit( sc );
}
#endif
/*
* Stop accepting more transmission packets temporarily, when
* a filter change request is delayed. Updating the MARs on
* 86960 flushes the transmission buffer, so it is delayed
* until all buffered transmission packets have been sent
* out.
*/
if ( sc->filter_change ) {
/*
* Filter change request is delayed only when the DLC is
* working. DLC soon raise an interrupt after finishing
* the work.
*/
goto indicate_active;
}
for (;;) {
/*
* See if there is room to put another packet in the buffer.
* We *could* do better job by peeking the send queue to
* know the length of the next packet. Current version just
* tests against the worst case (i.e., longest packet). FIXME.
*
* When adding the packet-peek feature, don't forget adding a
* test on txb_count against QUEUEING_MAX.
* There is a little chance the packet count exceeds
* the limit. Assume transmission buffer is 8KB (2x8KB
* configuration) and an application sends a bunch of small
* (i.e., minimum packet sized) packets rapidly. An 8KB
* buffer can hold 130 blocks of 62 bytes long...
*/
if ( sc->txb_free
< ETHER_MAX_LEN - ETHER_CRC_LEN + FE_DATA_LEN_LEN ) {
/* No room. */
goto indicate_active;
}
#if FE_SINGLE_TRANSMISSION
if ( sc->txb_count > 0 ) {
/* Just one packet per a transmission buffer. */
goto indicate_active;
}
#endif
/*
* Get the next mbuf chain for a packet to send.
*/
IF_DEQUEUE( &sc->sc_if.if_snd, m );
if ( m == NULL ) {
/* No more packets to send. */
goto indicate_inactive;
}
/*
* Copy the mbuf chain into the transmission buffer.
* txb_* variables are updated as necessary.
*/
fe_write_mbufs( sc, m );
/* Start transmitter if it's idle. */
if ( ( sc->txb_count > 0 ) && ( sc->txb_sched == 0 ) ) {
fe_xmit( sc );
}
/*
* Tap off here if there is a bpf listener,
* and the device is *not* in promiscuous mode.
* (86960 receives self-generated packets if
* and only if it is in "receive everything"
* mode.)
*/
#if NBPFILTER > 0
if ( sc->sc_if.if_bpf
&& !( sc->sc_if.if_flags & IFF_PROMISC ) ) {
bpf_mtap( &sc->sc_if, m );
}
#endif
m_freem( m );
}
indicate_inactive:
/*
* 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.
*/
sc->sc_if.if_flags &= ~IFF_OACTIVE;
return;
indicate_active:
/*
* The transmitter is active, and there are no room for
* more outgoing packets in the transmission buffer.
*/
sc->sc_if.if_flags |= IFF_OACTIVE;
return;
}
/*
* Drop (skip) a packet from receive buffer in 86960 memory.
*/
static void
fe_droppacket ( struct fe_softc * sc, int len )
{
int i;
/*
* 86960 manual says that we have to read 8 bytes from the buffer
* before skip the packets and that there must be more than 8 bytes
* remaining in the buffer when issue a skip command.
* Remember, we have already read 4 bytes before come here.
*/
if ( len > 12 ) {
/* Read 4 more bytes, and skip the rest of the packet. */
( void )inw( sc->ioaddr[ FE_BMPR8 ] );
( void )inw( sc->ioaddr[ FE_BMPR8 ] );
outb( sc->ioaddr[ FE_BMPR14 ], FE_B14_SKIP );
} else {
/* We should not come here unless receiving RUNTs. */
for ( i = 0; i < len; i += 2 ) {
( void )inw( sc->ioaddr[ FE_BMPR8 ] );
}
}
}
/*
* Empty receiving buffer.
*/
static void
fe_emptybuffer ( struct fe_softc * sc )
{
int i;
u_char saved_dlcr5;
#if FE_DEBUG >= 2
log( LOG_WARNING, "fe%d: emptying receive buffer\n", sc->sc_unit );
#endif
/*
* Stop receiving packets, temporarily.
*/
saved_dlcr5 = inb( sc->ioaddr[ FE_DLCR5 ] );
outb( sc->ioaddr[ FE_DLCR5 ], sc->proto_dlcr5 );
DELAY(1300);
/*
* When we come here, the receive buffer management should
* have been broken. So, we cannot use skip operation.
* Just discard everything in the buffer.
*/
for (i = 0; i < 32768; i++) {
if ( inb( sc->ioaddr[ FE_DLCR5 ] ) & FE_D5_BUFEMP ) break;
( void )inw( sc->ioaddr[ FE_BMPR8 ] );
}
/*
* Double check.
*/
if ( inb( sc->ioaddr[ FE_DLCR5 ] ) & FE_D5_BUFEMP ) {
log( LOG_ERR, "fe%d: could not empty receive buffer\n",
sc->sc_unit );
/* Hmm. What should I do if this happens? FIXME. */
}
/*
* Restart receiving packets.
*/
outb( sc->ioaddr[ FE_DLCR5 ], saved_dlcr5 );
}
/*
* Transmission interrupt handler
* The control flow of this function looks silly. FIXME.
*/
static void
fe_tint ( struct fe_softc * sc, u_char tstat )
{
int left;
int col;
/*
* Handle "excessive collision" interrupt.
*/
if ( tstat & FE_D0_COLL16 ) {
/*
* Find how many packets (including this collided one)
* are left unsent in transmission buffer.
*/
left = inb( sc->ioaddr[ FE_BMPR10 ] );
#if FE_DEBUG >= 2
log( LOG_WARNING, "fe%d: excessive collision (%d/%d)\n",
sc->sc_unit, left, sc->txb_sched );
#endif
#if FE_DEBUG >= 3
fe_dump( LOG_INFO, sc, NULL );
#endif
/*
* Clear the collision flag (in 86960) here
* to avoid confusing statistics.
*/
outb( sc->ioaddr[ FE_DLCR0 ], FE_D0_COLLID );
/*
* Restart transmitter, skipping the
* collided packet.
*
* We *must* skip the packet to keep network running
* properly. Excessive collision error is an
* indication of the network overload. If we
* tried sending the same packet after excessive
* collision, the network would be filled with
* out-of-time packets. Packets belonging
* to reliable transport (such as TCP) are resent
* by some upper layer.
*/
outb( sc->ioaddr[ FE_BMPR11 ],
FE_B11_CTRL_SKIP | FE_B11_MODE1 );
/* Update statistics. */
sc->tx_excolls++;
}
/*
* Handle "transmission complete" interrupt.
*/
if ( tstat & FE_D0_TXDONE ) {
/*
* Add in total number of collisions on last
* transmission. We also clear "collision occurred" flag
* here.
*
* 86960 has a design flaw on collision count on multiple
* packet transmission. When we send two or more packets
* with one start command (that's what we do when the
* transmission queue is crowded), 86960 informs us number
* of collisions occurred on the last packet on the
* transmission only. Number of collisions on previous
* packets are lost. I have told that the fact is clearly
* stated in the Fujitsu document.
*
* I considered not to mind it seriously. Collision
* count is not so important, anyway. Any comments? FIXME.
*/
if ( inb( sc->ioaddr[ FE_DLCR0 ] ) & FE_D0_COLLID ) {
/* Clear collision flag. */
outb( sc->ioaddr[ FE_DLCR0 ], FE_D0_COLLID );
/* Extract collision count from 86960. */
col = inb( sc->ioaddr[ FE_DLCR4 ] );
col = ( col & FE_D4_COL ) >> FE_D4_COL_SHIFT;
if ( col == 0 ) {
/*
* Status register indicates collisions,
* while the collision count is zero.
* This can happen after multiple packet
* transmission, indicating that one or more
* previous packet(s) had been collided.
*
* Since the accurate number of collisions
* has been lost, we just guess it as 1;
* Am I too optimistic? FIXME.
*/
col = 1;
}
sc->sc_if.if_collisions += col;
#if FE_DEBUG >= 3
log( LOG_WARNING, "fe%d: %d collision(s) (%d)\n",
sc->sc_unit, col, sc->txb_sched );
#endif
}
/*
* Update transmission statistics.
* Be sure to reflect number of excessive collisions.
*/
sc->sc_if.if_opackets += sc->txb_sched - sc->tx_excolls;
sc->sc_if.if_oerrors += sc->tx_excolls;
sc->sc_if.if_collisions += sc->tx_excolls * 16;
sc->txb_sched = 0;
/*
* The transmitter is no more active.
* Reset output active flag and watchdog timer.
*/
sc->sc_if.if_flags &= ~IFF_OACTIVE;
sc->sc_if.if_timer = 0;
/*
* If more data is ready to transmit in the buffer, start
* transmitting them. Otherwise keep transmitter idle,
* even if more data is queued. This gives receive
* process a slight priority.
*/
if ( sc->txb_count > 0 ) fe_xmit( sc );
}
}
/*
* Ethernet interface receiver interrupt.
*/
static void
fe_rint ( struct fe_softc * sc, u_char rstat )
{
u_short len;
u_char status;
int i;
/*
* Update statistics if this interrupt is caused by an error.
*/
if ( rstat & ( FE_D1_OVRFLO | FE_D1_CRCERR
| FE_D1_ALGERR | FE_D1_SRTPKT ) ) {
#if FE_DEBUG >= 2
log( LOG_WARNING,
"fe%d: receive error: %s%s%s%s(%02x)\n",
sc->sc_unit,
rstat & FE_D1_OVRFLO ? "OVR " : "",
rstat & FE_D1_CRCERR ? "CRC " : "",
rstat & FE_D1_ALGERR ? "ALG " : "",
rstat & FE_D1_SRTPKT ? "LEN " : "",
rstat );
#endif
sc->sc_if.if_ierrors++;
}
/*
* MB86960 has a flag indicating "receive queue empty."
* We just loop, checking the flag, to pull out all received
* packets.
*
* We limit the number of iterations to avoid infinite-loop.
* The upper bound is set to unrealistic high value.
*/
for (i = 0; i < FE_MAX_RECV_COUNT * 2; i++) {
/* Stop the iteration if 86960 indicates no packets. */
if ( inb( sc->ioaddr[ FE_DLCR5 ] ) & FE_D5_BUFEMP ) break;
/*
* Extract A receive status byte.
* As our 86960 is in 16 bit bus access mode, we have to
* use inw() to get the status byte. The significant
* value is returned in lower 8 bits.
*/
status = ( u_char )inw( sc->ioaddr[ FE_BMPR8 ] );
#if FE_DEBUG >= 4
log( LOG_INFO, "fe%d: receive status = %04x\n",
sc->sc_unit, status );
#endif
/*
* Extract the packet length.
* It is a sum of a header (14 bytes) and a payload.
* CRC has been stripped off by the 86960.
*/
len = inw( sc->ioaddr[ FE_BMPR8 ] );
#if FE_DEBUG >= 1
/*
* If there was an error with the received packet, it
* must be an indication of out-of-sync on receive
* buffer, because we have programmed the 8696x to
* to discard errored packets, even when the interface
* is in promiscuous mode. We have to re-synchronize.
*/
if (!(status & FE_RPH_GOOD)) {
log(LOG_ERR,
"fe%d: corrupted receive status byte (%02x)\n",
sc->arpcom.ac_if.if_unit, status);
sc->arpcom.ac_if.if_ierrors++;
fe_emptybuffer( sc );
break;
}
#endif
#if FE_DEBUG >= 1
/*
* MB86960 checks the packet length and drop big packet
* before passing it to us. There are no chance we can
* get big packets through it, even if they are actually
* sent over a line. Hence, if the length exceeds
* the specified limit, it means some serious failure,
* such as out-of-sync on receive buffer management.
*
* Same for short packets, since we have programmed
* 86960 to drop short packets.
*/
if ( len > ETHER_MAX_LEN - ETHER_CRC_LEN
|| len < ETHER_MIN_LEN - ETHER_CRC_LEN ) {
log( LOG_WARNING,
"fe%d: received a %s packet? (%u bytes)\n",
sc->sc_unit,
len < ETHER_MIN_LEN - ETHER_CRC_LEN
? "partial" : "big",
len );
sc->sc_if.if_ierrors++;
fe_emptybuffer( sc );
break;
}
#endif
/*
* Go get a packet.
*/
if ( fe_get_packet( sc, len ) < 0 ) {
#if FE_DEBUG >= 2
log( LOG_WARNING, "%s%d: out of mbuf;"
" dropping a packet (%u bytes)\n",
sc->sc_unit, len );
#endif
/* Skip a packet, updating statistics. */
sc->sc_if.if_ierrors++;
fe_droppacket( sc, len );
/*
* Try extracting other packets, although they will
* cause out-of-mbuf error again. This is required
* to keep receiver interrupt comming.
* (Earlier versions had a bug on this point.)
*/
continue;
}
/* Successfully received a packet. Update stat. */
sc->sc_if.if_ipackets++;
}
}
/*
* Ethernet interface interrupt processor
*/
void
feintr ( int unit )
{
struct fe_softc *sc = &fe_softc[unit];
u_char tstat, rstat;
/*
* Loop until there are no more new interrupt conditions.
*/
for (;;) {
#if FE_DEBUG >= 4
fe_dump( LOG_INFO, sc, "intr()" );
#endif
/*
* Get interrupt conditions, masking unneeded flags.
*/
tstat = inb( sc->ioaddr[ FE_DLCR0 ] ) & FE_TMASK;
rstat = inb( sc->ioaddr[ FE_DLCR1 ] ) & FE_RMASK;
#if FE_DEBUG >= 1
/* Test for a "dead-lock" condition. */
if ((rstat & FE_D1_PKTRDY) == 0
&& (inb(sc->ioaddr[FE_DLCR5]) & FE_D5_BUFEMP) == 0
&& (inb(sc->ioaddr[FE_DLCR1]) & FE_D1_PKTRDY) == 0) {
/*
* PKTRDY is off, while receive buffer is not empty.
* We did a double check to avoid a race condition...
* So, we should have missed an interrupt.
*/
log(LOG_WARNING,
"fe%d: missed a receiver interrupt?\n",
sc->arpcom.ac_if.if_unit);
/* Simulate the missed interrupt condition. */
rstat |= FE_D1_PKTRDY;
}
#endif
/* Stop processing if there are no interrupts to handle. */
if ( tstat == 0 && rstat == 0 ) break;
/*
* Reset the conditions we are acknowledging.
*/
outb( sc->ioaddr[ FE_DLCR0 ], tstat );
outb( sc->ioaddr[ FE_DLCR1 ], rstat );
/*
* Handle transmitter interrupts. Handle these first because
* the receiver will reset the board under some conditions.
*/
if ( tstat ) {
fe_tint( sc, tstat );
}
/*
* Handle receiver interrupts
*/
if ( rstat ) {
fe_rint( sc, rstat );
}
/*
* Update the multicast address filter if it is
* needed and possible. We do it now, because
* we can make sure the transmission buffer is empty,
* and there is a good chance that the receive queue
* is empty. It will minimize the possibility of
* packet loss.
*/
if ( sc->filter_change
&& sc->txb_count == 0 && sc->txb_sched == 0 ) {
fe_loadmar(sc);
sc->sc_if.if_flags &= ~IFF_OACTIVE;
}
/*
* If it looks like the transmitter can take more data,
* attempt to start output on the interface. This is done
* after handling the receiver interrupt to give the
* receive operation priority.
*
* BTW, I'm not sure in what case the OACTIVE is on at
* this point. Is the following test redundant?
*
* No. This routine polls for both transmitter and
* receiver interrupts. 86960 can raise a receiver
* interrupt when the transmission buffer is full.
*/
if ( ( sc->sc_if.if_flags & IFF_OACTIVE ) == 0 ) {
fe_start( &sc->sc_if );
}
}
}
/*
* Process an ioctl request. This code needs some work - it looks
* pretty ugly.
*/
static int
fe_ioctl ( struct ifnet * ifp, int command, caddr_t data )
{
struct fe_softc *sc = ifp->if_softc;
int s, error = 0;
#if FE_DEBUG >= 3
log( LOG_INFO, "fe%d: ioctl(%x)\n", sc->sc_unit, command );
#endif
s = splimp();
switch (command) {
case SIOCSIFADDR:
{
struct ifaddr * ifa = ( struct ifaddr * )data;
sc->sc_if.if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
fe_init( sc->sc_unit ); /* before arp_ifinit */
arp_ifinit( &sc->arpcom, ifa );
break;
#endif
#ifdef IPX
/*
* XXX - This code is probably wrong
*/
case AF_IPX:
{
register struct ipx_addr *ina
= &(IA_SIPX(ifa)->sipx_addr);
if (ipx_nullhost(*ina))
ina->x_host =
*(union ipx_host *) (sc->sc_enaddr); else {
bcopy((caddr_t) ina->x_host.c_host,
(caddr_t) sc->sc_enaddr,
sizeof(sc->sc_enaddr));
}
/*
* Set new address
*/
fe_init(sc->sc_unit);
break;
}
#endif
#ifdef INET6
case AF_INET6:
/* IPV6 added by shin 96.2.6 */
fe_init(sc->sc_unit);
ndp6_ifinit(&sc->arpcom, ifa);
break;
#endif
#ifdef NS
/*
* XXX - This code is probably wrong
*/
case AF_NS:
{
register struct ns_addr *ina
= &(IA_SNS(ifa)->sns_addr);
if (ns_nullhost(*ina))
ina->x_host =
*(union ns_host *) (sc->sc_enaddr);
else {
bcopy((caddr_t) ina->x_host.c_host,
(caddr_t) sc->sc_enaddr,
sizeof(sc->sc_enaddr));
}
/*
* Set new address
*/
fe_init(sc->sc_unit);
break;
}
#endif
default:
fe_init( sc->sc_unit );
break;
}
break;
}
#ifdef SIOCGIFADDR
case SIOCGIFADDR:
{
struct ifreq * ifr = ( struct ifreq * )data;
struct sockaddr * sa = ( struct sockaddr * )&ifr->ifr_data;
bcopy((caddr_t)sc->sc_enaddr,
(caddr_t)sa->sa_data, ETHER_ADDR_LEN);
break;
}
#endif
#ifdef SIOCGIFPHYSADDR
case SIOCGIFPHYSADDR:
{
struct ifreq * ifr = ( struct ifreq * )data;
bcopy((caddr_t)sc->sc_enaddr,
(caddr_t)&ifr->ifr_data, ETHER_ADDR_LEN);
break;
}
#endif
#ifdef notdef
#ifdef SIOCSIFPHYSADDR
case SIOCSIFPHYSADDR:
{
/*
* Set the physical (Ethernet) address of the interface.
* When and by whom is this command used? FIXME.
*/
struct ifreq * ifr = ( struct ifreq * )data;
bcopy((caddr_t)&ifr->ifr_data,
(caddr_t)sc->sc_enaddr, ETHER_ADDR_LEN);
fe_setlinkaddr( sc );
break;
}
#endif
#endif /* notdef */
#ifdef SIOCSIFFLAGS
case SIOCSIFFLAGS:
{
/*
* Switch interface state between "running" and
* "stopped", reflecting the UP flag.
*/
if ( sc->sc_if.if_flags & IFF_UP ) {
if ( ( sc->sc_if.if_flags & IFF_RUNNING ) == 0 ) {
fe_init( sc->sc_unit );
}
} else {
if ( ( sc->sc_if.if_flags & IFF_RUNNING ) != 0 ) {
fe_stop( sc->sc_unit );
}
}
/*
* Promiscuous and/or multicast flags may have changed,
* so reprogram the multicast filter and/or receive mode.
*/
fe_setmode( sc );
#if FE_DEBUG >= 1
/* "ifconfig fe0 debug" to print register dump. */
if ( sc->sc_if.if_flags & IFF_DEBUG ) {
fe_dump( LOG_DEBUG, sc, "SIOCSIFFLAGS(DEBUG)" );
}
#endif
break;
}
#endif
#ifdef SIOCADDMULTI
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
fe_setmode( sc );
error = 0;
break;
#endif
#ifdef SIOCSIFMTU
case SIOCSIFMTU:
{
/*
* Set the interface MTU.
*/
struct ifreq * ifr = ( struct ifreq * )data;
if ( ifr->ifr_mtu > ETHERMTU ) {
error = EINVAL;
} else {
sc->sc_if.if_mtu = ifr->ifr_mtu;
}
break;
}
#endif
default:
error = EINVAL;
}
(void) splx(s);
return (error);
}
/*
* Retrieve packet from receive buffer and send to the next level up via
* ether_input(). If there is a BPF listener, give a copy to BPF, too.
* Returns 0 if success, -1 if error (i.e., mbuf allocation failure).
*/
static int
fe_get_packet ( struct fe_softc * sc, u_short len )
{
struct ether_header *eh;
struct mbuf *m;
/*
* NFS wants the data be aligned to the word (4 byte)
* boundary. Ethernet header has 14 bytes. There is a
* 2-byte gap.
*/
#define NFS_MAGIC_OFFSET 2
/*
* This function assumes that an Ethernet packet fits in an
* mbuf (with a cluster attached when necessary.) On FreeBSD
* 2.0 for x86, which is the primary target of this driver, an
* mbuf cluster has 4096 bytes, and we are happy. On ancient
* BSDs, such as vanilla 4.3 for 386, a cluster size was 1024,
* however. If the following #error message were printed upon
* compile, you need to rewrite this function.
*/
#if ( MCLBYTES < ETHER_MAX_LEN - ETHER_CRC_LEN + NFS_MAGIC_OFFSET )
#error "Too small MCLBYTES to use fe driver."
#endif
/*
* Our strategy has one more problem. There is a policy on
* mbuf cluster allocation. It says that we must have at
* least MINCLSIZE (208 bytes on FreeBSD 2.0 for x86) to
* allocate a cluster. For a packet of a size between
* (MHLEN - 2) to (MINCLSIZE - 2), our code violates the rule...
* On the other hand, the current code is short, simple,
* and fast, however. It does no harmful thing, just waists
* some memory. Any comments? FIXME.
*/
/* Allocate an mbuf with packet header info. */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if ( m == NULL ) return -1;
/* Attach a cluster if this packet doesn't fit in a normal mbuf. */
if ( len > MHLEN - NFS_MAGIC_OFFSET ) {
MCLGET( m, M_DONTWAIT );
if ( !( m->m_flags & M_EXT ) ) {
m_freem( m );
return -1;
}
}
/* Initialize packet header info. */
m->m_pkthdr.rcvif = &sc->sc_if;
m->m_pkthdr.len = len;
/* Set the length of this packet. */
m->m_len = len;
/* The following silliness is to make NFS happy */
m->m_data += NFS_MAGIC_OFFSET;
/* Get a packet. */
insw( sc->ioaddr[ FE_BMPR8 ], m->m_data, ( len + 1 ) >> 1 );
/* Get (actually just point to) the header part. */
eh = mtod( m, struct ether_header *);
#define ETHER_ADDR_IS_MULTICAST(A) (*(char *)(A) & 1)
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface.
* If it is, hand off the raw packet to bpf.
*/
if ( sc->sc_if.if_bpf ) {
bpf_mtap( &sc->sc_if, m );
}
#endif
/*
* Make sure this packet is (or may be) directed to us.
* That is, the packet is either unicasted to our address,
* or broad/multi-casted. If any other packets are
* received, it is an indication of an error -- probably
* 86960 is in a wrong operation mode.
* Promiscuous mode is an exception. Under the mode, all
* packets on the media must be received. (We must have
* programmed the 86960 so.)
*/
if ( ( sc->sc_if.if_flags & IFF_PROMISC )
&& !ETHER_ADDR_IS_MULTICAST( eh->ether_dhost )
&& bcmp( eh->ether_dhost, sc->sc_enaddr, ETHER_ADDR_LEN ) != 0 ) {
/*
* The packet was not for us. This is normal since
* we are now in promiscuous mode. Just drop the packet.
*/
m_freem( m );
return 0;
}
#if FE_DEBUG >= 3
if ( !ETHER_ADDR_IS_MULTICAST( eh->ether_dhost )
&& bcmp( eh->ether_dhost, sc->sc_enaddr, ETHER_ADDR_LEN ) != 0 ) {
/*
* This packet was not for us. We can't be in promiscuous
* mode since the case was handled by above test.
* We found an error (of this driver.)
*/
log( LOG_WARNING,
"fe%d: got an unwanted packet, dst = %6D\n",
sc->sc_unit, eh->ether_dhost , ":" );
m_freem( m );
return 0;
}
#endif
/* Strip off the Ethernet header. */
m->m_pkthdr.len -= sizeof ( struct ether_header );
m->m_len -= sizeof ( struct ether_header );
m->m_data += sizeof ( struct ether_header );
/* Feed the packet to upper layer. */
ether_input( &sc->sc_if, eh, m );
return 0;
}
/*
* Write an mbuf chain to the transmission buffer memory using 16 bit PIO.
* Returns number of bytes actually written, including length word.
*
* If an mbuf chain is too long for an Ethernet frame, it is not sent.
* Packets shorter than Ethernet minimum are legal, and we pad them
* before sending out. An exception is "partial" packets which are
* shorter than mandatory Ethernet header.
*/
static void
fe_write_mbufs ( struct fe_softc *sc, struct mbuf *m )
{
u_short addr_bmpr8 = sc->ioaddr[ FE_BMPR8 ];
u_short length, len;
struct mbuf *mp;
u_char *data;
u_short savebyte; /* WARNING: Architecture dependent! */
#define NO_PENDING_BYTE 0xFFFF
static u_char padding [ ETHER_MIN_LEN - ETHER_CRC_LEN - ETHER_HDR_LEN ];
#if FE_DEBUG >= 1
/* First, count up the total number of bytes to copy */
length = 0;
for ( mp = m; mp != NULL; mp = mp->m_next ) {
length += mp->m_len;
}
#else
/* Just use the length value in the packet header. */
length = m->m_pkthdr.len;
#endif
#if FE_DEBUG >= 2
/* Check if this matches the one in the packet header. */
if ( length != m->m_pkthdr.len ) {
log( LOG_WARNING, "fe%d: packet length mismatch? (%d/%d)\n",
sc->sc_unit, length, m->m_pkthdr.len );
}
#endif
#if FE_DEBUG >= 1
/*
* Should never send big packets. If such a packet is passed,
* it should be a bug of upper layer. We just ignore it.
* ... Partial (too short) packets, neither.
*/
if ( length < ETHER_HDR_LEN
|| length > ETHER_MAX_LEN - ETHER_CRC_LEN ) {
log( LOG_ERR,
"fe%d: got an out-of-spec packet (%u bytes) to send\n",
sc->sc_unit, length );
sc->sc_if.if_oerrors++;
return;
}
#endif
/*
* Put the length word for this frame.
* Does 86960 accept odd length? -- Yes.
* Do we need to pad the length to minimum size by ourselves?
* -- Generally yes. But for (or will be) the last
* packet in the transmission buffer, we can skip the
* padding process. It may gain performance slightly. FIXME.
*/
outw( addr_bmpr8, max( length, ETHER_MIN_LEN - ETHER_CRC_LEN ) );
/*
* Update buffer status now.
* Truncate the length up to an even number, since we use outw().
*/
length = ( length + 1 ) & ~1;
sc->txb_free -= FE_DATA_LEN_LEN + max( length, ETHER_MIN_LEN - ETHER_CRC_LEN);
sc->txb_count++;
/*
* Transfer the data from mbuf chain to the transmission buffer.
* MB86960 seems to require that data be transferred as words, and
* only words. So that we require some extra code to patch
* over odd-length mbufs.
*/
savebyte = NO_PENDING_BYTE;
for ( mp = m; mp != 0; mp = mp->m_next ) {
/* Ignore empty mbuf. */
len = mp->m_len;
if ( len == 0 ) continue;
/* Find the actual data to send. */
data = mtod(mp, caddr_t);
/* Finish the last byte. */
if ( savebyte != NO_PENDING_BYTE ) {
outw( addr_bmpr8, savebyte | ( *data << 8 ) );
data++;
len--;
savebyte = NO_PENDING_BYTE;
}
/* output contiguous words */
if (len > 1) {
outsw( addr_bmpr8, data, len >> 1);
data += len & ~1;
len &= 1;
}
/* Save a remaining byte, if there is one. */
if ( len > 0 ) {
savebyte = *data;
}
}
/* Spit the last byte, if the length is odd. */
if ( savebyte != NO_PENDING_BYTE ) {
outw( addr_bmpr8, savebyte );
}
/* Pad to the Ethernet minimum length, if the packet is too short. */
if ( length < ETHER_MIN_LEN - ETHER_CRC_LEN ) {
outsw( addr_bmpr8, padding, ( ETHER_MIN_LEN - ETHER_CRC_LEN - length ) >> 1);
}
}
/*
* Compute hash value for an Ethernet address
*/
static int
fe_hash ( u_char * ep )
{
#define FE_HASH_MAGIC_NUMBER 0xEDB88320L
u_long hash = 0xFFFFFFFFL;
int i, j;
u_char b;
u_long m;
for ( i = ETHER_ADDR_LEN; --i >= 0; ) {
b = *ep++;
for ( j = 8; --j >= 0; ) {
m = hash;
hash >>= 1;
if ( ( m ^ b ) & 1 ) hash ^= FE_HASH_MAGIC_NUMBER;
b >>= 1;
}
}
return ( ( int )( hash >> 26 ) );
}
/*
* Compute the multicast address filter from the
* list of multicast addresses we need to listen to.
*/
static struct fe_filter
fe_mcaf ( struct fe_softc *sc )
{
int index;
struct fe_filter filter;
struct ifmultiaddr *ifma;
filter = fe_filter_nothing;
for (ifma = sc->arpcom.ac_if.if_multiaddrs.lh_first; ifma;
ifma = ifma->ifma_link.le_next) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
index = fe_hash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
#if FE_DEBUG >= 4
log( LOG_INFO, "fe%d: hash(%6D) == %d\n",
sc->sc_unit, enm->enm_addrlo , ":", index );
#endif
filter.data[index >> 3] |= 1 << (index & 7);
}
return ( filter );
}
/*
* Calculate a new "multicast packet filter" and put the 86960
* receiver in appropriate mode.
*/
static void
fe_setmode ( struct fe_softc *sc )
{
int flags = sc->sc_if.if_flags;
/*
* If the interface is not running, we postpone the update
* process for receive modes and multicast address filter
* until the interface is restarted. It reduces some
* complicated job on maintaining chip states. (Earlier versions
* of this driver had a bug on that point...)
*
* To complete the trick, fe_init() calls fe_setmode() after
* restarting the interface.
*/
if ( !( flags & IFF_RUNNING ) ) return;
/*
* Promiscuous mode is handled separately.
*/
if ( flags & IFF_PROMISC ) {
/*
* Program 86960 to receive all packets on the segment
* including those directed to other stations.
* Multicast filter stored in MARs are ignored
* under this setting, so we don't need to update it.
*
* Promiscuous mode in FreeBSD 2 is used solely by
* BPF, and BPF only listens to valid (no error) packets.
* So, we ignore erroneous ones even in this mode.
* (Older versions of fe driver mistook the point.)
*/
outb( sc->ioaddr[ FE_DLCR5 ],
sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1 );
sc->filter_change = 0;
#if FE_DEBUG >= 3
log( LOG_INFO, "fe%d: promiscuous mode\n", sc->sc_unit );
#endif
return;
}
/*
* Turn the chip to the normal (non-promiscuous) mode.
*/
outb( sc->ioaddr[ FE_DLCR5 ], sc->proto_dlcr5 | FE_D5_AFM1 );
/*
* Find the new multicast filter value.
* I'm not sure we have to handle modes other than MULTICAST.
* Who sets ALLMULTI? Who turns MULTICAST off? FIXME.
*/
if ( flags & IFF_ALLMULTI ) {
sc->filter = fe_filter_all;
} else if ( flags & IFF_MULTICAST ) {
sc->filter = fe_mcaf( sc );
} else {
sc->filter = fe_filter_nothing;
}
sc->filter_change = 1;
#if FE_DEBUG >= 3
log( LOG_INFO, "fe%d: address filter: [%8D]\n",
sc->sc_unit, sc->filter.data, " " );
#endif
/*
* We have to update the multicast filter in the 86960, A.S.A.P.
*
* Note that the DLC (Data Link Control unit, i.e. transmitter
* and receiver) must be stopped when feeding the filter, and
* DLC trashes all packets in both transmission and receive
* buffers when stopped.
*
* ... Are the above sentences correct? I have to check the
* manual of the MB86960A. FIXME.
*
* To reduce the packet loss, we delay the filter update
* process until buffers are empty.
*/
if ( sc->txb_sched == 0 && sc->txb_count == 0
&& !( inb( sc->ioaddr[ FE_DLCR1 ] ) & FE_D1_PKTRDY ) ) {
/*
* Buffers are (apparently) empty. Load
* the new filter value into MARs now.
*/
fe_loadmar(sc);
} else {
/*
* Buffers are not empty. Mark that we have to update
* the MARs. The new filter will be loaded by feintr()
* later.
*/
#if FE_DEBUG >= 4
log( LOG_INFO, "fe%d: filter change delayed\n", sc->sc_unit );
#endif
}
}
/*
* Load a new multicast address filter into MARs.
*
* The caller must have splimp'ed before fe_loadmar.
* This function starts the DLC upon return. So it can be called only
* when the chip is working, i.e., from the driver's point of view, when
* a device is RUNNING. (I mistook the point in previous versions.)
*/
static void
fe_loadmar ( struct fe_softc * sc )
{
/* Stop the DLC (transmitter and receiver). */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_DISABLE );
DELAY( 200 );
/* Select register bank 1 for MARs. */
outb( sc->ioaddr[ FE_DLCR7 ],
sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP );
/* Copy filter value into the registers. */
outblk( sc, FE_MAR8, sc->filter.data, FE_FILTER_LEN );
/* Restore the bank selection for BMPRs (i.e., runtime registers). */
outb( sc->ioaddr[ FE_DLCR7 ],
sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP );
/* Restart the DLC. */
DELAY( 200 );
outb( sc->ioaddr[ FE_DLCR6 ], sc->proto_dlcr6 | FE_D6_DLC_ENABLE );
DELAY( 200 );
/* We have just updated the filter. */
sc->filter_change = 0;
#if FE_DEBUG >= 3
log( LOG_INFO, "fe%d: address filter changed\n", sc->sc_unit );
#endif
}
#if FE_DEBUG >= 1
static void
fe_dump ( int level, struct fe_softc * sc, char * message )
{
log( level, "fe%d: %s,"
" DLCR = %02x %02x %02x %02x %02x %02x %02x %02x,"
" BMPR = xx xx %02x %02x %02x %02x %02x %02x,"
" asic = %02x %02x %02x %02x %02x %02x %02x %02x"
" + %02x %02x %02x %02x %02x %02x %02x %02x\n",
sc->sc_unit, message ? message : "registers",
inb( sc->ioaddr[ FE_DLCR0 ] ), inb( sc->ioaddr[ FE_DLCR1 ] ),
inb( sc->ioaddr[ FE_DLCR2 ] ), inb( sc->ioaddr[ FE_DLCR3 ] ),
inb( sc->ioaddr[ FE_DLCR4 ] ), inb( sc->ioaddr[ FE_DLCR5 ] ),
inb( sc->ioaddr[ FE_DLCR6 ] ), inb( sc->ioaddr[ FE_DLCR7 ] ),
inb( sc->ioaddr[ FE_BMPR10 ] ), inb( sc->ioaddr[ FE_BMPR11 ] ),
inb( sc->ioaddr[ FE_BMPR12 ] ), inb( sc->ioaddr[ FE_BMPR13 ] ),
inb( sc->ioaddr[ FE_BMPR14 ] ), inb( sc->ioaddr[ FE_BMPR15 ] ),
inb( sc->ioaddr[ 0x10 ] ), inb( sc->ioaddr[ 0x11 ] ),
inb( sc->ioaddr[ 0x12 ] ), inb( sc->ioaddr[ 0x13 ] ),
inb( sc->ioaddr[ 0x14 ] ), inb( sc->ioaddr[ 0x15 ] ),
inb( sc->ioaddr[ 0x16 ] ), inb( sc->ioaddr[ 0x17 ] ),
inb( sc->ioaddr[ 0x18 ] ), inb( sc->ioaddr[ 0x19 ] ),
inb( sc->ioaddr[ 0x1A ] ), inb( sc->ioaddr[ 0x1B ] ),
inb( sc->ioaddr[ 0x1C ] ), inb( sc->ioaddr[ 0x1D ] ),
inb( sc->ioaddr[ 0x1E ] ), inb( sc->ioaddr[ 0x1F ] ) );
}
#endif
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