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freebsd-dev/sys/dev/cs/if_cs.c
Robert Watson de1af409d2 Since if_cs doesn't contain locking or run with INTR_MPSAFE, mark 
the interface as IFF_NEEDSGIANT so if_start is run holding Giant.
2004-08-13 23:03:11 +00:00

1256 lines
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/*
* Copyright (c) 1997,1998 Maxim Bolotin and Oleg Sharoiko.
* 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 unmodified, 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
*
* Device driver for Crystal Semiconductor CS8920 based ethernet
* adapters. By Maxim Bolotin and Oleg Sharoiko, 27-April-1997
*/
/*
#define CS_DEBUG
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net/bpf.h>
#include <dev/cs/if_csvar.h>
#include <dev/cs/if_csreg.h>
#ifdef CS_USE_64K_DMA
#define CS_DMA_BUFFER_SIZE 65536
#else
#define CS_DMA_BUFFER_SIZE 16384
#endif
static void cs_init(void *);
static int cs_ioctl(struct ifnet *, u_long, caddr_t);
static void cs_start(struct ifnet *);
static void cs_stop(struct cs_softc *);
static void cs_reset(struct cs_softc *);
static void cs_watchdog(struct ifnet *);
static int cs_mediachange(struct ifnet *);
static void cs_mediastatus(struct ifnet *, struct ifmediareq *);
static int cs_mediaset(struct cs_softc *, int);
static void cs_write_mbufs(struct cs_softc*, struct mbuf*);
static void cs_xmit_buf(struct cs_softc*);
static int cs_get_packet(struct cs_softc*);
static void cs_setmode(struct cs_softc*);
static int get_eeprom_data(struct cs_softc *sc, int, int, uint16_t *);
static int get_eeprom_cksum(int, int, uint16_t *);
static int wait_eeprom_ready( struct cs_softc *);
static void control_dc_dc( struct cs_softc *, int );
static int send_test_pkt( struct cs_softc * );
static int enable_tp(struct cs_softc *);
static int enable_aui(struct cs_softc *);
static int enable_bnc(struct cs_softc *);
static int cs_duplex_auto(struct cs_softc *);
devclass_t cs_devclass;
/* sysctl vars */
SYSCTL_NODE(_hw, OID_AUTO, cs, CTLFLAG_RD, 0, "cs device parameters");
int cs_debug = 0;
TUNABLE_INT("hw.cs.debug", &cs_debug);
SYSCTL_INT(_hw_cs, OID_AUTO, debug, CTLFLAG_RW,
&cs_debug, 0,
"cs debug");
int cs_ignore_cksum_failure = 0;
TUNABLE_INT("hw.cs.ignore_checksum_failure", &cs_ignore_cksum_failure);
SYSCTL_INT(_hw_cs, OID_AUTO, ignore_checksum_failure, CTLFLAG_RW,
&cs_ignore_cksum_failure, 0,
"ignore checksum errors in cs card EEPROM");
static int cs_recv_delay = 570;
TUNABLE_INT("hw.cs.recv_delay", &cs_ignore_cksum_failure);
SYSCTL_INT(_hw_cs, OID_AUTO, recv_delay, CTLFLAG_RW, &cs_recv_delay, 570, "");
static int
get_eeprom_data(struct cs_softc *sc, int off, int len, uint16_t *buffer)
{
int i;
#ifdef CS_DEBUG
printf(CS_NAME":EEPROM data from %x for %x:\n", off, len);
#endif
for (i=0; i < len; i++) {
if (wait_eeprom_ready(sc) < 0)
return (-1);
/* Send command to EEPROM to read */
cs_writereg(sc, PP_EECMD, (off + i) | EEPROM_READ_CMD);
if (wait_eeprom_ready(sc) < 0)
return (-1);
buffer[i] = cs_readreg(sc, PP_EEData);
#ifdef CS_DEBUG
printf("%02x %02x ",(unsigned char)buffer[i],
(unsigned char)buffer[i] >> 8);
#endif
}
#ifdef CS_DEBUG
printf("\n");
#endif
return (0);
}
static int
get_eeprom_cksum(int off, int len, uint16_t *buffer)
{
int i;
uint16_t cksum=0;
for (i = 0; i < len; i++)
cksum += buffer[i];
cksum &= 0xffff;
if (cksum==0)
return (0);
if (cs_ignore_cksum_failure) {
printf(CS_NAME": checksum mismatch, ignoring\n");
return (0);
}
return (-1);
}
static int
wait_eeprom_ready(struct cs_softc *sc)
{
DELAY(30000); /* XXX should we do some checks here ? */
return 0;
}
static void
control_dc_dc(struct cs_softc *sc, int on_not_off)
{
unsigned int self_control = HCB1_ENBL;
if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0) ^ on_not_off)
self_control |= HCB1;
else
self_control &= ~HCB1;
cs_writereg(sc, PP_SelfCTL, self_control);
DELAY(500000);
}
static int
cs_duplex_auto(struct cs_softc *sc)
{
int i, error=0;
cs_writereg(sc, PP_AutoNegCTL,
RE_NEG_NOW | ALLOW_FDX | AUTO_NEG_ENABLE);
for (i=0; cs_readreg(sc, PP_AutoNegST) & AUTO_NEG_BUSY; i++) {
if (i > 40000) {
if_printf(&sc->arpcom.ac_if,
"full/half duplex auto negotiation timeout\n");
error = ETIMEDOUT;
break;
}
DELAY(1000);
}
DELAY( 1000000 );
return error;
}
static int
enable_tp(struct cs_softc *sc)
{
cs_writereg(sc, PP_LineCTL, sc->line_ctl & ~AUI_ONLY);
control_dc_dc(sc, 0);
DELAY( 150000 );
if ((cs_readreg(sc, PP_LineST) & LINK_OK)==0) {
if_printf(&sc->arpcom.ac_if, "failed to enable TP\n");
return EINVAL;
}
return 0;
}
/*
* XXX This was rewritten from Linux driver without any tests.
*/
static int
send_test_pkt(struct cs_softc *sc)
{
char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
0, 46, /* A 46 in network order */
0, 0, /* DSAP=0 & SSAP=0 fields */
0xf3, 0 /* Control (Test Req + P bit set) */ };
int i;
u_char ether_address_backup[ETHER_ADDR_LEN];
for (i = 0; i < ETHER_ADDR_LEN; i++)
ether_address_backup[i] = sc->arpcom.ac_enaddr[i];
cs_writereg(sc, PP_LineCTL, cs_readreg(sc, PP_LineCTL) | SERIAL_TX_ON);
bcopy(test_packet, sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
bcopy(test_packet+ETHER_ADDR_LEN,
sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
cs_outw(sc, TX_CMD_PORT, sc->send_cmd);
cs_outw(sc, TX_LEN_PORT, sizeof(test_packet));
/* Wait for chip to allocate memory */
DELAY(50000);
if (!(cs_readreg(sc, PP_BusST) & READY_FOR_TX_NOW)) {
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
return 0;
}
outsw(sc->nic_addr + TX_FRAME_PORT, test_packet, sizeof(test_packet));
DELAY(30000);
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->arpcom.ac_enaddr[i] = ether_address_backup[i];
if ((cs_readreg(sc, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK)
return 1;
return 0;
}
/*
* XXX This was rewritten from Linux driver without any tests.
*/
static int
enable_aui(struct cs_softc *sc)
{
control_dc_dc(sc, 0);
cs_writereg(sc, PP_LineCTL,
(sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
if (!send_test_pkt(sc)) {
if_printf(&sc->arpcom.ac_if, "failed to enable AUI\n");
return EINVAL;
}
return 0;
}
/*
* XXX This was rewritten from Linux driver without any tests.
*/
static int
enable_bnc(struct cs_softc *sc)
{
control_dc_dc(sc, 1);
cs_writereg(sc, PP_LineCTL,
(sc->line_ctl & ~AUTO_AUI_10BASET) | AUI_ONLY);
if (!send_test_pkt(sc)) {
if_printf(&sc->arpcom.ac_if, "failed to enable BNC\n");
return EINVAL;
}
return 0;
}
int
cs_cs89x0_probe(device_t dev)
{
int i;
int error;
u_long irq, junk;
struct cs_softc *sc = device_get_softc(dev);
unsigned rev_type = 0;
uint16_t id;
char chip_revision;
uint16_t eeprom_buff[CHKSUM_LEN];
int chip_type, pp_isaint, pp_isadma;
error = cs_alloc_port(dev, 0, CS_89x0_IO_PORTS);
if (error)
return (error);
sc->nic_addr = rman_get_start(sc->port_res);
if ((cs_inw(sc, ADD_PORT) & ADD_MASK) != ADD_SIG) {
/* Chip not detected. Let's try to reset it */
if (bootverbose)
device_printf(dev, "trying to reset the chip.\n");
cs_outw(sc, ADD_PORT, PP_SelfCTL);
i = cs_inw(sc, DATA_PORT);
cs_outw(sc, ADD_PORT, PP_SelfCTL);
cs_outw(sc, DATA_PORT, i | POWER_ON_RESET);
if ((cs_inw(sc, ADD_PORT) & ADD_MASK) != ADD_SIG)
return (ENXIO);
}
for (i = 0; i < 10000; i++) {
id = cs_readreg(sc, PP_ChipID);
if (id == CHIP_EISA_ID_SIG)
break;
}
if (i == 10000)
return (ENXIO);
rev_type = cs_readreg(sc, PRODUCT_ID_ADD);
chip_type = rev_type & ~REVISON_BITS;
chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
sc->chip_type = chip_type;
if(chip_type==CS8900) {
pp_isaint = PP_CS8900_ISAINT;
pp_isadma = PP_CS8900_ISADMA;
sc->send_cmd = TX_CS8900_AFTER_ALL;
} else {
pp_isaint = PP_CS8920_ISAINT;
pp_isadma = PP_CS8920_ISADMA;
sc->send_cmd = TX_CS8920_AFTER_ALL;
}
/*
* Clear some fields so that fail of EEPROM will left them clean
*/
sc->auto_neg_cnf = 0;
sc->adapter_cnf = 0;
sc->isa_config = 0;
/*
* If no interrupt specified (or "?"), use what the board tells us.
*/
error = bus_get_resource(dev, SYS_RES_IRQ, 0, &irq, &junk);
/*
* Get data from EEPROM
*/
if((cs_readreg(sc, PP_SelfST) & EEPROM_PRESENT) == 0) {
device_printf(dev, "No EEPROM, assuming defaults.\n");
} else {
if (get_eeprom_data(sc,START_EEPROM_DATA,CHKSUM_LEN, eeprom_buff)<0) {
device_printf(dev, "EEPROM read failed, "
"assuming defaults.\n");
} else {
if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN, eeprom_buff)<0) {
device_printf(dev, "EEPROM cheksum bad, "
"assuming defaults.\n");
} else {
sc->auto_neg_cnf =
eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
sc->adapter_cnf =
eeprom_buff[ADAPTER_CNF_OFFSET/2];
sc->isa_config =
eeprom_buff[ISA_CNF_OFFSET/2];
for (i=0; i<ETHER_ADDR_LEN/2; i++) {
sc->arpcom.ac_enaddr[i*2]=
eeprom_buff[i];
sc->arpcom.ac_enaddr[i*2+1]=
eeprom_buff[i] >> 8;
}
/*
* If no interrupt specified (or "?"),
* use what the board tells us.
*/
if (error) {
irq = sc->isa_config & INT_NO_MASK;
if (chip_type==CS8900) {
switch(irq) {
case 0:
irq=10;
error=0;
break;
case 1:
irq=11;
error=0;
break;
case 2:
irq=12;
error=0;
break;
case 3:
irq=5;
error=0;
break;
default:
device_printf(dev, "invalid irq in EEPROM.\n");
error=EINVAL;
}
} else {
if (irq>CS8920_NO_INTS) {
device_printf(dev, "invalid irq in EEPROM.\n");
error=EINVAL;
} else {
error=0;
}
}
if (!error)
bus_set_resource(dev, SYS_RES_IRQ, 0,
irq, 1);
}
}
}
}
if (!error) {
if (chip_type == CS8900) {
switch(irq) {
case 5:
irq = 3;
break;
case 10:
irq = 0;
break;
case 11:
irq = 1;
break;
case 12:
irq = 2;
break;
default:
error=EINVAL;
}
} else {
if (irq > CS8920_NO_INTS) {
error = EINVAL;
}
}
}
if (!error) {
cs_writereg(sc, pp_isaint, irq);
} else {
device_printf(dev, "Unknown or invalid irq\n");
return (ENXIO);
}
/*
* Temporary disabled
*
if (drq>0)
cs_writereg(sc, pp_isadma, drq);
else {
device_printf(dev, "incorrect drq\n",);
return 0;
}
*/
if (bootverbose)
device_printf(dev, "CS89%c0%s rev %c media%s%s%s\n",
chip_type==CS8900 ? '0' : '2',
chip_type==CS8920M ? "M" : "",
chip_revision,
(sc->adapter_cnf & A_CNF_10B_T) ? " TP" : "",
(sc->adapter_cnf & A_CNF_AUI) ? " AUI" : "",
(sc->adapter_cnf & A_CNF_10B_2) ? " BNC" : "");
if ((sc->adapter_cnf & A_CNF_EXTND_10B_2) &&
(sc->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
sc->line_ctl = LOW_RX_SQUELCH;
else
sc->line_ctl = 0;
return 0;
}
/*
* Allocate a port resource with the given resource id.
*/
int cs_alloc_port(device_t dev, int rid, int size)
{
struct cs_softc *sc = device_get_softc(dev);
struct resource *res;
res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
0ul, ~0ul, size, RF_ACTIVE);
if (res) {
sc->port_rid = rid;
sc->port_res = res;
sc->port_used = size;
return (0);
} else {
return (ENOENT);
}
}
/*
* Allocate a memory resource with the given resource id.
*/
int cs_alloc_memory(device_t dev, int rid, int size)
{
struct cs_softc *sc = device_get_softc(dev);
struct resource *res;
res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
0ul, ~0ul, size, RF_ACTIVE);
if (res) {
sc->mem_rid = rid;
sc->mem_res = res;
sc->mem_used = size;
return (0);
} else {
return (ENOENT);
}
}
/*
* Allocate an irq resource with the given resource id.
*/
int cs_alloc_irq(device_t dev, int rid, int flags)
{
struct cs_softc *sc = device_get_softc(dev);
struct resource *res;
res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
(RF_ACTIVE | flags));
if (res) {
sc->irq_rid = rid;
sc->irq_res = res;
return (0);
} else {
return (ENOENT);
}
}
/*
* Release all resources
*/
void cs_release_resources(device_t dev)
{
struct cs_softc *sc = device_get_softc(dev);
if (sc->port_res) {
bus_release_resource(dev, SYS_RES_IOPORT,
sc->port_rid, sc->port_res);
sc->port_res = 0;
}
if (sc->mem_res) {
bus_release_resource(dev, SYS_RES_MEMORY,
sc->mem_rid, sc->mem_res);
sc->mem_res = 0;
}
if (sc->irq_res) {
bus_release_resource(dev, SYS_RES_IRQ,
sc->irq_rid, sc->irq_res);
sc->irq_res = 0;
}
}
/*
* Install the interface into kernel networking data structures
*/
int
cs_attach(device_t dev)
{
int media=0;
struct cs_softc *sc = device_get_softc(dev);;
struct ifnet *ifp = &(sc->arpcom.ac_if);
cs_stop( sc );
ifp->if_softc=sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_start=cs_start;
ifp->if_ioctl=cs_ioctl;
ifp->if_watchdog=cs_watchdog;
ifp->if_init=cs_init;
ifp->if_snd.ifq_maxlen= IFQ_MAXLEN;
/*
* MIB DATA
*/
/*
ifp->if_linkmib=&sc->mibdata;
ifp->if_linkmiblen=sizeof sc->mibdata;
*/
ifp->if_flags=(IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
IFF_NEEDSGIANT);
/*
* this code still in progress (DMA support)
*
sc->recv_ring=malloc(CS_DMA_BUFFER_SIZE<<1, M_DEVBUF, M_NOWAIT);
if (sc->recv_ring == NULL) {
log(LOG_ERR,
"%s: Couldn't allocate memory for NIC\n", ifp->if_xname);
return(0);
}
if ((sc->recv_ring-(sc->recv_ring & 0x1FFFF))
< (128*1024-CS_DMA_BUFFER_SIZE))
sc->recv_ring+=16*1024;
*/
sc->buffer=malloc(ETHER_MAX_LEN-ETHER_CRC_LEN,M_DEVBUF,M_NOWAIT);
if (sc->buffer == NULL) {
if_printf(ifp, "Couldn't allocate memory for NIC\n");
return(0);
}
/*
* Initialize the media structures.
*/
ifmedia_init(&sc->media, 0, cs_mediachange, cs_mediastatus);
if (sc->adapter_cnf & A_CNF_10B_T) {
ifmedia_add(&sc->media, IFM_ETHER|IFM_10_T, 0, NULL);
if (sc->chip_type != CS8900) {
ifmedia_add(&sc->media,
IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
ifmedia_add(&sc->media,
IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
}
}
if (sc->adapter_cnf & A_CNF_10B_2)
ifmedia_add(&sc->media, IFM_ETHER|IFM_10_2, 0, NULL);
if (sc->adapter_cnf & A_CNF_AUI)
ifmedia_add(&sc->media, IFM_ETHER|IFM_10_5, 0, NULL);
if (sc->adapter_cnf & A_CNF_MEDIA)
ifmedia_add(&sc->media, IFM_ETHER|IFM_AUTO, 0, NULL);
/* Set default media from EEPROM */
switch (sc->adapter_cnf & A_CNF_MEDIA_TYPE) {
case A_CNF_MEDIA_AUTO: media = IFM_ETHER|IFM_AUTO; break;
case A_CNF_MEDIA_10B_T: media = IFM_ETHER|IFM_10_T; break;
case A_CNF_MEDIA_10B_2: media = IFM_ETHER|IFM_10_2; break;
case A_CNF_MEDIA_AUI: media = IFM_ETHER|IFM_10_5; break;
default:
if_printf(ifp, "no media, assuming 10baseT\n");
sc->adapter_cnf |= A_CNF_10B_T;
ifmedia_add(&sc->media, IFM_ETHER|IFM_10_T, 0, NULL);
if (sc->chip_type != CS8900) {
ifmedia_add(&sc->media,
IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
ifmedia_add(&sc->media,
IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
}
media = IFM_ETHER | IFM_10_T;
break;
}
ifmedia_set(&sc->media, media);
cs_mediaset(sc, media);
ether_ifattach(ifp, sc->arpcom.ac_enaddr);
return (0);
}
/*
* Initialize the board
*/
static void
cs_init(void *xsc)
{
struct cs_softc *sc=(struct cs_softc *)xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
int i, s, rx_cfg;
/*
* reset whatchdog timer
*/
ifp->if_timer=0;
sc->buf_len = 0;
s=splimp();
/*
* Hardware initialization of cs
*/
/* Enable receiver and transmitter */
cs_writereg(sc, PP_LineCTL,
cs_readreg(sc, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
/* Configure the receiver mode */
cs_setmode(sc);
/*
* This defines what type of frames will cause interrupts
* Bad frames should generate interrupts so that the driver
* could track statistics of discarded packets
*/
rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL | RX_RUNT_ENBL |
RX_EXTRA_DATA_ENBL;
if (sc->isa_config & STREAM_TRANSFER)
rx_cfg |= RX_STREAM_ENBL;
cs_writereg(sc, PP_RxCFG, rx_cfg);
cs_writereg(sc, PP_TxCFG, TX_LOST_CRS_ENBL |
TX_SQE_ERROR_ENBL | TX_OK_ENBL | TX_LATE_COL_ENBL |
TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
cs_writereg(sc, PP_BufCFG, READY_FOR_TX_ENBL |
RX_MISS_COUNT_OVRFLOW_ENBL | TX_COL_COUNT_OVRFLOW_ENBL |
TX_UNDERRUN_ENBL /*| RX_DMA_ENBL*/);
/* Write MAC address into IA filter */
for (i=0; i<ETHER_ADDR_LEN/2; i++)
cs_writereg(sc, PP_IA + i * 2,
sc->arpcom.ac_enaddr[i * 2] |
(sc->arpcom.ac_enaddr[i * 2 + 1] << 8) );
/*
* Now enable everything
*/
/*
#ifdef CS_USE_64K_DMA
cs_writereg(sc, PP_BusCTL, ENABLE_IRQ | RX_DMA_SIZE_64K);
#else
cs_writereg(sc, PP_BusCTL, ENABLE_IRQ);
#endif
*/
cs_writereg(sc, PP_BusCTL, ENABLE_IRQ);
/*
* Set running and clear output active flags
*/
sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
/*
* Start sending process
*/
cs_start(ifp);
(void) splx(s);
}
/*
* Get the packet from the board and send it to the upper layer.
*/
static int
cs_get_packet(struct cs_softc *sc)
{
struct ifnet *ifp = &(sc->arpcom.ac_if);
int iobase = sc->nic_addr, status, length;
struct ether_header *eh;
struct mbuf *m;
#ifdef CS_DEBUG
int i;
#endif
status = cs_inw(sc, RX_FRAME_PORT);
length = cs_inw(sc, RX_FRAME_PORT);
#ifdef CS_DEBUG
if_printf(ifp, "rcvd: stat %x, len %d\n",
status, length);
#endif
if (!(status & RX_OK)) {
#ifdef CS_DEBUG
if_printf(ifp, "bad pkt stat %x\n", status);
#endif
ifp->if_ierrors++;
return -1;
}
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m==NULL)
return -1;
if (length > MHLEN) {
MCLGET(m, M_DONTWAIT);
if (!(m->m_flags & M_EXT)) {
m_freem(m);
return -1;
}
}
/* Initialize packet's header info */
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = length;
m->m_len = length;
/* Get the data */
insw(iobase + RX_FRAME_PORT, m->m_data, (length+1)>>1);
eh = mtod(m, struct ether_header *);
#ifdef CS_DEBUG
for (i=0;i<length;i++)
printf(" %02x",(unsigned char)*((char *)(m->m_data+i)));
printf( "\n" );
#endif
if (status & (RX_IA | RX_BROADCAST) ||
(ifp->if_flags & IFF_MULTICAST && status & RX_HASHED)) {
/* Feed the packet to the upper layer */
(*ifp->if_input)(ifp, m);
ifp->if_ipackets++;
if (length == ETHER_MAX_LEN-ETHER_CRC_LEN)
DELAY(cs_recv_delay);
} else {
m_freem(m);
}
return 0;
}
/*
* Handle interrupts
*/
void
csintr(void *arg)
{
struct cs_softc *sc = (struct cs_softc*) arg;
struct ifnet *ifp = &(sc->arpcom.ac_if);
int status;
#ifdef CS_DEBUG
if_printf(ifp, "Interrupt.\n");
#endif
while ((status=cs_inw(sc, ISQ_PORT))) {
#ifdef CS_DEBUG
if_printf(ifp, "from ISQ: %04x\n", status);
#endif
switch (status & ISQ_EVENT_MASK) {
case ISQ_RECEIVER_EVENT:
cs_get_packet(sc);
break;
case ISQ_TRANSMITTER_EVENT:
if (status & TX_OK)
ifp->if_opackets++;
else
ifp->if_oerrors++;
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
break;
case ISQ_BUFFER_EVENT:
if (status & READY_FOR_TX) {
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
}
if (status & TX_UNDERRUN) {
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
ifp->if_oerrors++;
}
break;
case ISQ_RX_MISS_EVENT:
ifp->if_ierrors+=(status>>6);
break;
case ISQ_TX_COL_EVENT:
ifp->if_collisions+=(status>>6);
break;
}
}
if (!(ifp->if_flags & IFF_OACTIVE)) {
cs_start(ifp);
}
}
/*
* Save the data in buffer
*/
static void
cs_write_mbufs( struct cs_softc *sc, struct mbuf *m )
{
int len;
struct mbuf *mp;
unsigned char *data, *buf;
for (mp=m, buf=sc->buffer, sc->buf_len=0; mp != NULL; mp=mp->m_next) {
len = mp->m_len;
/*
* Ignore empty parts
*/
if (!len)
continue;
/*
* Find actual data address
*/
data = mtod(mp, caddr_t);
bcopy((caddr_t) data, (caddr_t) buf, len);
buf += len;
sc->buf_len += len;
}
}
static void
cs_xmit_buf( struct cs_softc *sc )
{
outsw(sc->nic_addr+TX_FRAME_PORT, sc->buffer, (sc->buf_len+1)>>1);
sc->buf_len = 0;
}
static void
cs_start(struct ifnet *ifp)
{
int s, length;
struct mbuf *m, *mp;
struct cs_softc *sc = ifp->if_softc;
s = splimp();
for (;;) {
if (sc->buf_len)
length = sc->buf_len;
else {
IF_DEQUEUE( &ifp->if_snd, m );
if (m==NULL) {
(void) splx(s);
return;
}
for (length=0, mp=m; mp != NULL; mp=mp->m_next)
length += mp->m_len;
/* Skip zero-length packets */
if (length == 0) {
m_freem(m);
continue;
}
cs_write_mbufs(sc, m);
BPF_MTAP(ifp, m);
m_freem(m);
}
/*
* Issue a SEND command
*/
cs_outw(sc, TX_CMD_PORT, sc->send_cmd);
cs_outw(sc, TX_LEN_PORT, length );
/*
* If there's no free space in the buffer then leave
* this packet for the next time: indicate output active
* and return.
*/
if (!(cs_readreg(sc, PP_BusST) & READY_FOR_TX_NOW)) {
ifp->if_timer = sc->buf_len;
(void) splx(s);
ifp->if_flags |= IFF_OACTIVE;
return;
}
cs_xmit_buf(sc);
/*
* Set the watchdog timer in case we never hear
* from board again. (I don't know about correct
* value for this timeout)
*/
ifp->if_timer = length;
(void) splx(s);
ifp->if_flags |= IFF_OACTIVE;
return;
}
}
/*
* Stop everything on the interface
*/
static void
cs_stop(struct cs_softc *sc)
{
int s = splimp();
cs_writereg(sc, PP_RxCFG, 0);
cs_writereg(sc, PP_TxCFG, 0);
cs_writereg(sc, PP_BufCFG, 0);
cs_writereg(sc, PP_BusCTL, 0);
sc->arpcom.ac_if.if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
sc->arpcom.ac_if.if_timer = 0;
(void) splx(s);
}
/*
* Reset the interface
*/
static void
cs_reset(struct cs_softc *sc)
{
cs_stop(sc);
cs_init(sc);
}
static void
cs_setmode(struct cs_softc *sc)
{
struct ifnet *ifp = &(sc->arpcom.ac_if);
int rx_ctl;
/* Stop the receiver while changing filters */
cs_writereg(sc, PP_LineCTL, cs_readreg(sc, PP_LineCTL) & ~SERIAL_RX_ON);
if (ifp->if_flags & IFF_PROMISC) {
/* Turn on promiscuous mode. */
rx_ctl = RX_OK_ACCEPT | RX_PROM_ACCEPT;
} else {
if (ifp->if_flags & IFF_MULTICAST) {
/* Allow receiving frames with multicast addresses */
rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
RX_OK_ACCEPT | RX_MULTCAST_ACCEPT;
/*
* Here the reconfiguration of chip's multicast
* filters should be done but I've no idea about
* hash transformation in this chip. If you can
* add this code or describe me the transformation
* I'd be very glad.
*/
} else {
/*
* Receive only good frames addressed for us and
* good broadcasts.
*/
rx_ctl = RX_IA_ACCEPT | RX_BROADCAST_ACCEPT |
RX_OK_ACCEPT;
}
}
/* Set up the filter */
cs_writereg(sc, PP_RxCTL, RX_DEF_ACCEPT | rx_ctl);
/* Turn on receiver */
cs_writereg(sc, PP_LineCTL, cs_readreg(sc, PP_LineCTL) | SERIAL_RX_ON);
}
static int
cs_ioctl(register struct ifnet *ifp, u_long command, caddr_t data)
{
struct cs_softc *sc=ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
int s,error=0;
#ifdef CS_DEBUG
if_printf(ifp, "ioctl(%lx)\n", command);
#endif
s=splimp();
switch (command) {
case SIOCSIFFLAGS:
/*
* Switch interface state between "running" and
* "stopped", reflecting the UP flag.
*/
if (sc->arpcom.ac_if.if_flags & IFF_UP) {
if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)==0) {
cs_init(sc);
}
} else {
if ((sc->arpcom.ac_if.if_flags & IFF_RUNNING)!=0) {
cs_stop(sc);
}
}
/*
* Promiscuous and/or multicast flags may have changed,
* so reprogram the multicast filter and/or receive mode.
*
* See note about multicasts in cs_setmode
*/
cs_setmode(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*
* See note about multicasts in cs_setmode
*/
cs_setmode(sc);
error = 0;
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
break;
default:
ether_ioctl(ifp, command, data);
break;
}
(void) splx(s);
return error;
}
/*
* Device timeout/watchdog routine. Entered if the device neglects to
* generate an interrupt after a transmit has been started on it.
*/
static void
cs_watchdog(struct ifnet *ifp)
{
struct cs_softc *sc = ifp->if_softc;
ifp->if_oerrors++;
log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
/* Reset the interface */
if (ifp->if_flags & IFF_UP)
cs_reset(sc);
else
cs_stop(sc);
}
static int
cs_mediachange(struct ifnet *ifp)
{
struct cs_softc *sc = ifp->if_softc;
struct ifmedia *ifm = &sc->media;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return EINVAL;
return cs_mediaset(sc, ifm->ifm_media);
}
static void
cs_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
int line_status;
struct cs_softc *sc = ifp->if_softc;
ifmr->ifm_active = IFM_ETHER;
line_status = cs_readreg(sc, PP_LineST);
if (line_status & TENBASET_ON) {
ifmr->ifm_active |= IFM_10_T;
if (sc->chip_type != CS8900) {
if (cs_readreg(sc, PP_AutoNegST) & FDX_ACTIVE)
ifmr->ifm_active |= IFM_FDX;
if (cs_readreg(sc, PP_AutoNegST) & HDX_ACTIVE)
ifmr->ifm_active |= IFM_HDX;
}
ifmr->ifm_status = IFM_AVALID;
if (line_status & LINK_OK)
ifmr->ifm_status |= IFM_ACTIVE;
} else {
if (line_status & AUI_ON) {
cs_writereg(sc, PP_SelfCTL, cs_readreg(sc, PP_SelfCTL) |
HCB1_ENBL);
if (((sc->adapter_cnf & A_CNF_DC_DC_POLARITY)!=0)^
(cs_readreg(sc, PP_SelfCTL) & HCB1))
ifmr->ifm_active |= IFM_10_2;
else
ifmr->ifm_active |= IFM_10_5;
}
}
}
static int
cs_mediaset(struct cs_softc *sc, int media)
{
int error;
/* Stop the receiver & transmitter */
cs_writereg(sc, PP_LineCTL, cs_readreg(sc, PP_LineCTL) &
~(SERIAL_RX_ON | SERIAL_TX_ON));
#ifdef CS_DEBUG
if_printf(&sc->arpcom.ac_if, "cs_setmedia(%x)\n", media);
#endif
switch (IFM_SUBTYPE(media)) {
default:
case IFM_AUTO:
if ((error=enable_tp(sc))==0)
error = cs_duplex_auto(sc);
else if ((error=enable_bnc(sc)) != 0)
error = enable_aui(sc);
break;
case IFM_10_T:
if ((error=enable_tp(sc)) != 0)
break;
if (media & IFM_FDX)
cs_duplex_full(sc);
else if (media & IFM_HDX)
cs_duplex_half(sc);
else
error = cs_duplex_auto(sc);
break;
case IFM_10_2:
error = enable_bnc(sc);
break;
case IFM_10_5:
error = enable_aui(sc);
break;
}
/*
* Turn the transmitter & receiver back on
*/
cs_writereg(sc, PP_LineCTL, cs_readreg(sc, PP_LineCTL) |
SERIAL_RX_ON | SERIAL_TX_ON);
return error;
}
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