Re: Nile VIA VT86C916 NIC
First I should point out that I am not absolutely sure that my NIC has the VIA
VT86C916 Nile chip.
I am attaching fet916.c, which is on the diskette that I got with my NIC.
Although I couldn't get the attached fet916.c to work (not even to compile),
I managed to get the NIC to work with the ne module. Except for a problem when
booting the PC, this module works. Perhaps you will give it a try.
> stake@go2.pl wrote:
> >
> > Sorry i know this is stupid but im looking for drivers to
> > my network component (Nile VIA VT86C916)
> > it was given to me for free & i cant find drivers
> > (i have only the hardware)
> > Can u help me ?
> >
> > --
> > Unsubscribe? mail -s unsubscribe debian-user-request@lists.debian.org < /dev/null
>
> It's (usually) much quicker searching the kernel documentation
> (if installed) or failing that, a search engine. Although, worryingly,
> I couldn't find any references in the kernel. Perhaps its a clone of
> a more well-known chip set.
>
> The search engine www.google.com lists 4 links - 1 broken link, 1
> english
> text regarding linux ethernet drivers, 1 in Japanese and one FTP
> directory
> containing (presumably) the DOS driver. The linux link contains a
> broken
> link to a file 86c916.c - perhaps you could mail the author.
>
> My advice would be to plug it in and see what happens. If it's a PCI
> card, the BIOS should report its vendor and device numbers. If it's
> ISA PnP, then I think pnpdump should give you similar info.
>
> It would also be appreciated if your subject line was a bit more
> verbose than "?" - it's a high volume list ;)
>
> Good luck.
>
> --
> Regards,
> Paul
>
>
> --
> Unsubscribe? mail -s unsubscribe debian-user-request@lists.debian.org < /dev/null
>
/* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
/*
Written 1992-94 by Donald Becker.
Copyright 1993 United States Government as represented by the
Director, National Security Agency.
This software may be used and distributed according to the terms
of the GNU Public License, incorporated herein by reference.
The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
Center of Excellence in Space Data and Information Sciences
Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
This driver should work with many programmed-I/O 8390-based ethernet
boards. Currently it supports the NE1000, NE2000, many clones,
and some Cabletron products.
Changelog:
Paul Gortmaker : use ENISR_RDC to monitor Tx PIO uploads, made
sanity checks and bad clone support optional.
Paul Gortmaker : new reset code, reset card after probe at boot.
Paul Gortmaker : multiple card support for module users.
Paul Gortmaker : Support for PCI ne2k clones, similar to lance.c
Paul Gortmaker : Allow users with bad cards to avoid full probe.
*/
/* Routines for the NatSemi-based designs (NE[12]000). */
static const char *version =
"916.c:VIA Technologies Inc. 10BaseT Linux driver v1.0 \n";
#include <linux/module.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/bios32.h>
#include <asm/system.h>
#include <asm/io.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/ioport.h>
#include <linux/skbuff.h>
/*#include "8390.h"*/
#define TX_2X_PAGES 12
#define TX_1X_PAGES 6
/* Should always use two Tx slots to get back-to-back transmits. */
#define EI_PINGPONG
#ifdef EI_PINGPONG
#define TX_PAGES TX_2X_PAGES
#else
#define TX_PAGES TX_1X_PAGES
#endif
#define ETHER_ADDR_LEN 6
/* The 8390 specific per-packet-header format. */
struct e8390_pkt_hdr {
unsigned char status; /* status */
unsigned char next; /* pointer to next packet. */
unsigned short count; /* header + packet length in bytes */
};
/* From 8390.c */
int ei_debug;
struct sigaction ei_sigaction;
int ethif_init(struct device *dev);
int ethdev_init(struct device *dev);
void NS8390_init(struct device *dev, int startp);
int ei_open(struct device *dev);
int ei_close(struct device *dev);
void ei_interrupt(int irq, void *dev_id, struct pt_regs *regs);
#ifndef HAVE_AUTOIRQ
/* From auto_irq.c */
struct device *irq2dev_map[16];
int autoirq_setup(int waittime);
int autoirq_report(int waittime);
#endif
/* Most of these entries should be in 'struct device' (or most of the
things in there should be here!) */
/* You have one of these per-board */
struct ei_device {
const char *name;
void (*reset_8390)(struct device *);
void (*get_8390_hdr)(struct device *, struct e8390_pkt_hdr *, int);
void (*block_output)(struct device *, int, const unsigned char *, int);
void (*block_input)(struct device *, int, struct sk_buff *, int);
unsigned open:1;
unsigned word16:1; /* We have the 16-bit (vs 8-bit) version of the card. */
unsigned txing:1; /* Transmit Active */
unsigned irqlock:1; /* 8390's intrs disabled when '1'. */
unsigned dmaing:1; /* Remote DMA Active */
unsigned char tx_start_page, rx_start_page, stop_page;
unsigned char current_page; /* Read pointer in buffer */
unsigned char interface_num; /* Net port (AUI, 10bT.) to use. */
unsigned char txqueue; /* Tx Packet buffer queue length. */
short tx1, tx2; /* Packet lengths for ping-pong tx. */
short lasttx; /* Alpha version consistency check. */
unsigned char reg0; /* Register '0' in a WD8013 */
unsigned char reg5; /* Register '5' in a WD8013 */
unsigned char saved_irq; /* Original dev->irq value. */
/* The new statistics table. */
struct enet_statistics stat;
};
/* The maximum number of 8390 interrupt service routines called per IRQ. */
#define MAX_SERVICE 12
/* The maximum time waited (in jiffies) before assuming a Tx failed. (20ms) */
#define TX_TIMEOUT (20*HZ/100)
#define ei_status (*(struct ei_device *)(dev->priv))
/* Some generic ethernet register configurations. */
#define E8390_TX_IRQ_MASK 0xa /* For register EN0_ISR */
#define E8390_RX_IRQ_MASK 0x5
#define E8390_RXCONFIG 0x4 /* EN0_RXCR: broadcasts, no multicast,errors */
#define E8390_RXOFF 0x20 /* EN0_RXCR: Accept no packets */
#define E8390_TXCONFIG 0x00 /* EN0_TXCR: Normal transmit mode */
#define E8390_TXOFF 0x02 /* EN0_TXCR: Transmitter off */
/* Register accessed at EN_CMD, the 8390 base addr. */
#define E8390_STOP 0x01 /* Stop and reset the chip */
#define E8390_START 0x02 /* Start the chip, clear reset */
#define E8390_TRANS 0x04 /* Transmit a frame */
#define E8390_RREAD 0x08 /* Remote read */
#define E8390_RWRITE 0x10 /* Remote write */
#define E8390_NODMA 0x20 /* Remote DMA */
#define E8390_PAGE0 0x00 /* Select page chip registers */
#define E8390_PAGE1 0x40 /* using the two high-order bits */
#define E8390_PAGE2 0x80 /* Page 3 is invalid. */
#define E8390_CMD 0x00 /* The command register (for all pages) */
/* Page 0 register offsets. */
#define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */
#define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */
#define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */
#define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */
#define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */
#define EN0_TSR 0x04 /* Transmit status reg RD */
#define EN0_TPSR 0x04 /* Transmit starting page WR */
#define EN0_NCR 0x05 /* Number of collision reg RD */
#define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */
#define EN0_FIFO 0x06 /* FIFO RD */
#define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */
#define EN0_ISR 0x07 /* Interrupt status reg RD WR */
#define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */
#define EN0_RSARLO 0x08 /* Remote start address reg 0 */
#define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */
#define EN0_RSARHI 0x09 /* Remote start address reg 1 */
#define EN0_RCNTLO 0x0a /* Remote byte count reg WR */
#define EN0_RCNTHI 0x0b /* Remote byte count reg WR */
#define EN0_RSR 0x0c /* rx status reg RD */
#define EN0_RXCR 0x0c /* RX configuration reg WR */
#define EN0_TXCR 0x0d /* TX configuration reg WR */
#define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */
#define EN0_DCFG 0x0e /* Data configuration reg WR */
#define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */
#define EN0_IMR 0x0f /* Interrupt mask reg WR */
#define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */
/* Bits in EN0_ISR - Interrupt status register */
#define ENISR_RX 0x01 /* Receiver, no error */
#define ENISR_TX 0x02 /* Transmitter, no error */
#define ENISR_RX_ERR 0x04 /* Receiver, with error */
#define ENISR_TX_ERR 0x08 /* Transmitter, with error */
#define ENISR_OVER 0x10 /* Receiver overwrote the ring */
#define ENISR_COUNTERS 0x20 /* Counters need emptying */
#define ENISR_RDC 0x40 /* remote dma complete */
#define ENISR_RESET 0x80 /* Reset completed */
#define ENISR_ALL 0x3f /* Interrupts we will enable */
/* Bits in EN0_DCFG - Data config register */
#define ENDCFG_WTS 0x01 /* word transfer mode selection */
/* Page 1 register offsets. */
#define EN1_PHYS 0x01 /* This board's physical enet addr RD WR */
#define EN1_CURPAG 0x07 /* Current memory page RD WR */
#define EN1_MULT 0x08 /* Multicast filter mask array (8 bytes) RD WR */
/* Bits in received packet status byte and EN0_RSR*/
#define ENRSR_RXOK 0x01 /* Received a good packet */
#define ENRSR_CRC 0x02 /* CRC error */
#define ENRSR_FAE 0x04 /* frame alignment error */
#define ENRSR_FO 0x08 /* FIFO overrun */
#define ENRSR_MPA 0x10 /* missed pkt */
#define ENRSR_PHY 0x20 /* physical/multicase address */
#define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */
#define ENRSR_DEF 0x80 /* deferring */
/* Transmitted packet status, EN0_TSR. */
#define ENTSR_PTX 0x01 /* Packet transmitted without error */
#define ENTSR_ND 0x02 /* The transmit wasn't deferred. */
#define ENTSR_COL 0x04 /* The transmit collided at least once. */
#define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */
#define ENTSR_CRS 0x10 /* The carrier sense was lost. */
#define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */
#define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */
#define ENTSR_OWC 0x80 /* There was an out-of-window collision. */
#define ei_reset_8390 (ei_local->reset_8390)
#define ei_block_output (ei_local->block_output)
#define ei_block_input (ei_local->block_input)
#define ei_get_8390_hdr (ei_local->get_8390_hdr)
/* use 0 for production, 1 for verification, >2 for debug */
#ifdef EI_DEBUG
int ei_debug = EI_DEBUG;
#else
int ei_debug = 1;
#endif
/* Index to functions. */
static void ei_tx_intr(struct device *dev);
static void ei_tx_err(struct device *dev);
static void ei_receive(struct device *dev);
static void ei_rx_overrun(struct device *dev);
/* Routines generic to NS8390-based boards. */
static void NS8390_trigger_send(struct device *dev, unsigned int length,
int start_page);
static void set_multicast_list(struct device *dev);
/*old code*/
/* Some defines that people can play with if so inclined. */
/* Do we support clones that don't adhere to 14,15 of the SAprom ? */
#define SUPPORT_NE_BAD_CLONES
/* Do we perform extra sanity checks on stuff ? */
/* #define NE_SANITY_CHECK */
/* Do we implement the read before write bugfix ? */
/* #define NE_RW_BUGFIX */
/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
/* #define PACKETBUF_MEMSIZE 0x40 */
/* ---- No user-serviceable parts below ---- */
/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int netcard_portlist[] =
{ 0x300, 0x280, 0x320, 0x340, 0x360, 0};
#ifdef SUPPORT_NE_BAD_CLONES
/* A list of bad clones that we none-the-less recognize. */
static struct { const char *name8, *name16; unsigned char SAprefix[4];}
bad_clone_list[] = {
{"DE100", "DE200", {0x00, 0xDE, 0x01,}},
{"DE120", "DE220", {0x00, 0x80, 0xc8,}},
{"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
{"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
{"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
{"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
{"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
{"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
{"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
{0,}
};
#endif
#define NE_BASE (dev->base_addr)
#define NE_CMD 0x00
#define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
#define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
#define NE_IO_EXTENT 0x20
#define NE1SM_START_PG 0x20 /* First page of TX buffer */
#define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
#define NESM_START_PG 0x40 /* First page of TX buffer */
#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
/* Non-zero only if the current card is a PCI with BIOS-set IRQ. */
static unsigned char pci_irq_line = 0;
int ne_probe(struct device *dev);
static int ne_probe1(struct device *dev, int ioaddr);
static int ne_open(struct device *dev);
static int ne_close(struct device *dev);
static void ne_reset_8390(struct device *dev);
static void ne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
int ring_page);
static void ne_block_input(struct device *dev, int count,
struct sk_buff *skb, int ring_offset);
static void ne_block_output(struct device *dev, const int count,
const unsigned char *buf, const int start_page);
/* Probe for various non-shared-memory ethercards.
NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
the SAPROM, while other supposed NE2000 clones must be detected by their
SA prefix.
Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
mode results in doubled values, which can be detected and compensated for.
The probe is also responsible for initializing the card and filling
in the 'dev' and 'ei_status' structures.
We use the minimum memory size for some ethercard product lines, iff we can't
distinguish models. You can increase the packet buffer size by setting
PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
E1010 starts at 0x100 and ends at 0x2000.
E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
E2010 starts at 0x100 and ends at 0x4000.
E2010-x starts at 0x100 and ends at 0xffff. */
#ifdef HAVE_DEVLIST
struct netdev_entry netcard_drv =
{"ne", ne_probe1, NE_IO_EXTENT, netcard_portlist};
#else
/* Note that this probe only picks up one card at a time, even for multiple
PCI ne2k cards. Use "ether=0,0,eth1" if you have a second PCI ne2k card.
This keeps things consistent regardless of the bus type of the card. */
int ne_probe(struct device *dev)
{
int i;
int base_addr = dev ? dev->base_addr : 0;
/* First check any supplied i/o locations. User knows best. <cough> */
if (base_addr > 0x1ff) /* Check a single specified location. */
return ne_probe1(dev, base_addr);
else if (base_addr != 0) /* Don't probe at all. */
return ENXIO;
/* Then look for any installed PCI clones */
#if defined(CONFIG_PCI)
if (pcibios_present()) {
int pci_index;
for (pci_index = 0; pci_index < 8; pci_index++) {
unsigned char pci_bus, pci_device_fn;
unsigned int pci_ioaddr;
/* Currently only Realtek are making PCI ne2k clones. */
if (pcibios_find_device (PCI_VENDOR_ID_REALTEK,
PCI_DEVICE_ID_REALTEK_8029, pci_index,
&pci_bus, &pci_device_fn) != 0)
break; /* OK, now try to probe for std. ISA card */
pcibios_read_config_byte(pci_bus, pci_device_fn,
PCI_INTERRUPT_LINE, &pci_irq_line);
pcibios_read_config_dword(pci_bus, pci_device_fn,
PCI_BASE_ADDRESS_0, &pci_ioaddr);
/* Strip the I/O address out of the returned value */
pci_ioaddr &= PCI_BASE_ADDRESS_IO_MASK;
/* Avoid already found cards from previous ne_probe() calls */
if (check_region(pci_ioaddr, NE_IO_EXTENT)) {
pci_irq_line=0;
continue;
}
printk("ne.c: PCI BIOS reports ne2000 clone at i/o %#x, irq %d.\n",
pci_ioaddr, pci_irq_line);
if (ne_probe1(dev, pci_ioaddr) != 0) { /* Shouldn't happen. */
printk(KERN_ERR "ne.c: Probe of PCI card at %#x failed.\n", pci_ioaddr);
break; /* Hrmm, try to probe for ISA card... */
}
pci_irq_line = 0;
return 0;
}
}
#endif /* defined(CONFIG_PCI) */
/* Last resort. The semi-risky ISA auto-probe. */
for (i = 0; netcard_portlist[i]; i++) {
int ioaddr = netcard_portlist[i];
if (check_region(ioaddr, NE_IO_EXTENT))
continue;
if (ne_probe1(dev, ioaddr) == 0)
return 0;
}
return ENODEV;
}
#endif
static int ne_probe1(struct device *dev, int ioaddr)
{
int i;
unsigned char SA_prom[32];
int wordlength = 2;
const char *name = NULL;
int start_page, stop_page;
int neX000, ctron, bad_card;
int reg0 = inb_p(ioaddr);
static unsigned version_printed = 0;
if (reg0 == 0xFF)
return ENODEV;
/* Do a preliminary verification that we have a 8390. */
{ int regd;
outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
regd = inb_p(ioaddr + 0x0d);
outb_p(0xff, ioaddr + 0x0d);
outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
outb_p(reg0, ioaddr);
outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
return ENODEV;
}
}
/* We should have a "dev" from Space.c or the static module table. */
if (dev == NULL) {
printk(KERN_ERR "ne.c: Passed a NULL device.\n");
dev = init_etherdev(0, 0);
}
if (ei_debug && version_printed++ == 0)
printk(version);
printk("NE*000 ethercard probe at %#3x:", ioaddr);
/* A user with a poor card that fails to ack the reset, or that
does not have a valid 0x57,0x57 signature can still use this
without having to recompile. Specifying an i/o address along
with an otherwise unused dev->mem_end value of "0xBAD" will
cause the driver to skip these parts of the probe. */
bad_card = ((dev->base_addr != 0) && (dev->mem_end == 0xbad));
/* Reset card. Who knows what dain-bramaged state it was left in. */
{ unsigned long reset_start_time = jiffies;
/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
if (jiffies - reset_start_time > 2*HZ/100) {
if (bad_card) {
printk(" (warning: no reset ack)");
break;
} else {
printk(" not found (no reset ack).\n");
return ENODEV;
}
}
outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
}
/* Read the 16 bytes of station address PROM.
We must first initialize registers, similar to NS8390_init(eifdev, 0).
We can't reliably read the SAPROM address without this.
(I learned the hard way!). */
{
struct {unsigned char value, offset; } program_seq[] = {
{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
{0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
{0x00, EN0_RCNTLO}, /* Clear the count regs. */
{0x00, EN0_RCNTHI},
{0x00, EN0_IMR}, /* Mask completion irq. */
{0xFF, EN0_ISR},
{E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
{E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
{32, EN0_RCNTLO},
{0x00, EN0_RCNTHI},
{0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
{0x00, EN0_RSARHI},
{E8390_RREAD+E8390_START, E8390_CMD},
};
for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
}
for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
SA_prom[i] = inb(ioaddr + NE_DATAPORT);
SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
if (SA_prom[i] != SA_prom[i+1])
wordlength = 1;
}
/* At this point, wordlength *only* tells us if the SA_prom is doubled
up or not because some broken PCI cards don't respect the byte-wide
request in program_seq above, and hence don't have doubled up values.
These broken cards would otherwise be detected as an ne1000. */
if (wordlength == 2)
for (i = 0; i < 16; i++)
SA_prom[i] = SA_prom[i+i];
if (pci_irq_line)
wordlength = 2; /* Catch broken cards mentioned above. */
if (wordlength == 2) {
/* We must set the 8390 for word mode. */
outb_p(0x49, ioaddr + EN0_DCFG);
start_page = NESM_START_PG;
stop_page = NESM_STOP_PG;
} else {
start_page = NE1SM_START_PG;
stop_page = NE1SM_STOP_PG;
}
neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
/* Set up the rest of the parameters. */
if (neX000 || bad_card) {
name = (wordlength == 2) ? "NE2000" : "NE1000";
} else if (ctron) {
name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
start_page = 0x01;
stop_page = (wordlength == 2) ? 0x40 : 0x20;
} else {
#ifdef SUPPORT_NE_BAD_CLONES
/* Ack! Well, there might be a *bad* NE*000 clone there.
Check for total bogus addresses. */
for (i = 0; bad_clone_list[i].name8; i++) {
if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
SA_prom[2] == bad_clone_list[i].SAprefix[2]) {
if (wordlength == 2) {
name = bad_clone_list[i].name16;
} else {
name = bad_clone_list[i].name8;
}
break;
}
}
if (bad_clone_list[i].name8 == NULL) {
printk(" not found (invalid signature %2.2x %2.2x).\n",
SA_prom[14], SA_prom[15]);
return ENXIO;
}
#else
printk(" not found.\n");
return ENXIO;
#endif
}
if (pci_irq_line) {
dev->irq = pci_irq_line;
}
if (dev->irq < 2) {
autoirq_setup(0);
outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
outb_p(0x00, ioaddr + EN0_RCNTLO);
outb_p(0x00, ioaddr + EN0_RCNTHI);
outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
dev->irq = autoirq_report(0);
if (ei_debug > 2)
printk(" autoirq is %d\n", dev->irq);
} else if (dev->irq == 2)
/* Fixup for users that don't know that IRQ 2 is really IRQ 9,
or don't know which one to set. */
dev->irq = 9;
if (! dev->irq) {
printk(" failed to detect IRQ line.\n");
return EAGAIN;
}
/* Snarf the interrupt now. There's no point in waiting since we cannot
share and the board will usually be enabled. */
{
int irqval = request_irq(dev->irq, ei_interrupt, 0, name, NULL);
if (irqval) {
printk (" unable to get IRQ %d (irqval=%d).\n", dev->irq, irqval);
return EAGAIN;
}
}
dev->base_addr = ioaddr;
/* Allocate dev->priv and fill in 8390 specific dev fields. */
if (ethdev_init(dev)) {
printk (" unable to get memory for dev->priv.\n");
free_irq(dev->irq, NULL);
return -ENOMEM;
}
request_region(ioaddr, NE_IO_EXTENT, name);
for(i = 0; i < ETHER_ADDR_LEN; i++) {
printk(" %2.2x", SA_prom[i]);
dev->dev_addr[i] = SA_prom[i];
}
printk("\n%s: %s found at %#x, using IRQ %d.\n",
dev->name, name, ioaddr, dev->irq);
ei_status.name = name;
ei_status.tx_start_page = start_page;
ei_status.stop_page = stop_page;
ei_status.word16 = (wordlength == 2);
ei_status.rx_start_page = start_page + TX_PAGES;
#ifdef PACKETBUF_MEMSIZE
/* Allow the packet buffer size to be overridden by know-it-alls. */
ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
#endif
ei_status.reset_8390 = &ne_reset_8390;
ei_status.block_input = &ne_block_input;
ei_status.block_output = &ne_block_output;
ei_status.get_8390_hdr = &ne_get_8390_hdr;
dev->open = &ne_open;
dev->stop = &ne_close;
NS8390_init(dev, 0);
return 0;
}
static int
ne_open(struct device *dev)
{
ei_open(dev);
MOD_INC_USE_COUNT;
return 0;
}
static int
ne_close(struct device *dev)
{
if (ei_debug > 1)
printk("%s: Shutting down ethercard.\n", dev->name);
ei_close(dev);
MOD_DEC_USE_COUNT;
return 0;
}
/* Hard reset the card. This used to pause for the same period that a
8390 reset command required, but that shouldn't be necessary. */
static void
ne_reset_8390(struct device *dev)
{
unsigned long reset_start_time = jiffies;
if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
ei_status.txing = 0;
ei_status.dmaing = 0;
/* This check _should_not_ be necessary, omit eventually. */
while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
if (jiffies - reset_start_time > 2*HZ/100) {
printk("%s: ne_reset_8390() did not complete.\n", dev->name);
break;
}
outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
}
/* Grab the 8390 specific header. Similar to the block_input routine, but
we don't need to be concerned with ring wrap as the header will be at
the start of a page, so we optimize accordingly. */
static void
ne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{
int nic_base = dev->base_addr;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
printk("%s: DMAing conflict in ne_get_8390_hdr "
"[DMAstat:%d][irqlock:%d][intr:%d].\n",
dev->name, ei_status.dmaing, ei_status.irqlock,
dev->interrupt);
return;
}
ei_status.dmaing |= 0x01;
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
outb_p(0, nic_base + EN0_RCNTHI);
outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
outb_p(ring_page, nic_base + EN0_RSARHI);
outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
if (ei_status.word16)
insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
else
insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
}
/* Block input and output, similar to the Crynwr packet driver. If you
are porting to a new ethercard, look at the packet driver source for hints.
The NEx000 doesn't share the on-board packet memory -- you have to put
the packet out through the "remote DMA" dataport using outb. */
static void
ne_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
{
#ifdef NE_SANITY_CHECK
int xfer_count = count;
#endif
int nic_base = dev->base_addr;
char *buf = skb->data;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
printk("%s: DMAing conflict in ne_block_input "
"[DMAstat:%d][irqlock:%d][intr:%d].\n",
dev->name, ei_status.dmaing, ei_status.irqlock,
dev->interrupt);
return;
}
ei_status.dmaing |= 0x01;
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
outb_p(count & 0xff, nic_base + EN0_RCNTLO);
outb_p(count >> 8, nic_base + EN0_RCNTHI);
outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
if (ei_status.word16) {
insw(NE_BASE + NE_DATAPORT,buf,count>>1);
if (count & 0x01) {
buf[count-1] = inb(NE_BASE + NE_DATAPORT);
#ifdef NE_SANITY_CHECK
xfer_count++;
#endif
}
} else {
insb(NE_BASE + NE_DATAPORT, buf, count);
}
#ifdef NE_SANITY_CHECK
/* This was for the ALPHA version only, but enough people have
been encountering problems so it is still here. If you see
this message you either 1) have a slightly incompatible clone
or 2) have noise/speed problems with your bus. */
if (ei_debug > 1) { /* DMA termination address check... */
int addr, tries = 20;
do {
/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
-- it's broken for Rx on some cards! */
int high = inb_p(nic_base + EN0_RSARHI);
int low = inb_p(nic_base + EN0_RSARLO);
addr = (high << 8) + low;
if (((ring_offset + xfer_count) & 0xff) == low)
break;
} while (--tries > 0);
if (tries <= 0)
printk("%s: RX transfer address mismatch,"
"%#4.4x (expected) vs. %#4.4x (actual).\n",
dev->name, ring_offset + xfer_count, addr);
}
#endif
outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
}
static void
ne_block_output(struct device *dev, int count,
const unsigned char *buf, const int start_page)
{
int nic_base = NE_BASE;
unsigned long dma_start;
#ifdef NE_SANITY_CHECK
int retries = 0;
#endif
/* Round the count up for word writes. Do we need to do this?
What effect will an odd byte count have on the 8390?
I should check someday. */
if (ei_status.word16 && (count & 0x01))
count++;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
printk("%s: DMAing conflict in ne_block_output."
"[DMAstat:%d][irqlock:%d][intr:%d]\n",
dev->name, ei_status.dmaing, ei_status.irqlock,
dev->interrupt);
return;
}
ei_status.dmaing |= 0x01;
/* We should already be in page 0, but to be safe... */
outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
#ifdef NE_SANITY_CHECK
retry:
#endif
#ifdef NE8390_RW_BUGFIX
/* Handle the read-before-write bug the same way as the
Crynwr packet driver -- the NatSemi method doesn't work.
Actually this doesn't always work either, but if you have
problems with your NEx000 this is better than nothing! */
outb_p(0x42, nic_base + EN0_RCNTLO);
outb_p(0x00, nic_base + EN0_RCNTHI);
outb_p(0x42, nic_base + EN0_RSARLO);
outb_p(0x00, nic_base + EN0_RSARHI);
outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
/* Make certain that the dummy read has occurred. */
SLOW_DOWN_IO;
SLOW_DOWN_IO;
SLOW_DOWN_IO;
#endif
outb_p(ENISR_RDC, nic_base + EN0_ISR);
/* Now the normal output. */
outb_p(count & 0xff, nic_base + EN0_RCNTLO);
outb_p(count >> 8, nic_base + EN0_RCNTHI);
outb_p(0x00, nic_base + EN0_RSARLO);
outb_p(start_page, nic_base + EN0_RSARHI);
outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
if (ei_status.word16) {
outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
} else {
outsb(NE_BASE + NE_DATAPORT, buf, count);
}
dma_start = jiffies;
#ifdef NE_SANITY_CHECK
/* This was for the ALPHA version only, but enough people have
been encountering problems so it is still here. */
if (ei_debug > 1) { /* DMA termination address check... */
int addr, tries = 20;
do {
int high = inb_p(nic_base + EN0_RSARHI);
int low = inb_p(nic_base + EN0_RSARLO);
addr = (high << 8) + low;
if ((start_page << 8) + count == addr)
break;
} while (--tries > 0);
if (tries <= 0) {
printk("%s: Tx packet transfer address mismatch,"
"%#4.4x (expected) vs. %#4.4x (actual).\n",
dev->name, (start_page << 8) + count, addr);
if (retries++ == 0)
goto retry;
}
}
#endif
while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
printk("%s: timeout waiting for Tx RDC.\n", dev->name);
ne_reset_8390(dev);
NS8390_init(dev,1);
break;
}
outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
return;
}
#ifdef MODULE
#define MAX_NE_CARDS 4 /* Max number of NE cards per module */
#define NAMELEN 8 /* # of chars for storing dev->name */
static char namelist[NAMELEN * MAX_NE_CARDS] = { 0, };
static struct device dev_ne[MAX_NE_CARDS] = {
{
NULL, /* assign a chunk of namelist[] below */
0, 0, 0, 0,
0, 0,
0, 0, 0, NULL, NULL
},
};
static int io[MAX_NE_CARDS] = { 0, };
static int irq[MAX_NE_CARDS] = { 0, };
/* This is set up so that no autoprobe takes place. We can't guarantee
that the ne2k probe is the last 8390 based probe to take place (as it
is at boot) and so the probe will get confused by any other 8390 cards.
ISA device autoprobes on a running machine are not recommended anyway. */
int
init_module(void)
{
int this_dev, found = 0;
for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
struct device *dev = &dev_ne[this_dev];
dev->name = namelist+(NAMELEN*this_dev);
dev->irq = irq[this_dev];
dev->base_addr = io[this_dev];
dev->init = ne_probe;
if (io[this_dev] == 0) {
if (this_dev != 0) break; /* only complain once */
printk(KERN_NOTICE "ne.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n");
return -EPERM;
}
if (register_netdev(dev) != 0) {
printk(KERN_WARNING "ne.c: No NE*000 card found (i/o = 0x%x).\n", io[this_dev]);
if (found != 0) return 0; /* Got at least one. */
return -ENXIO;
}
found++;
}
return 0;
}
void
cleanup_module(void)
{
int this_dev;
for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
struct device *dev = &dev_ne[this_dev];
if (dev->priv != NULL) {
kfree(dev->priv);
dev->priv = NULL;
free_irq(dev->irq, NULL);
irq2dev_map[dev->irq] = NULL;
release_region(dev->base_addr, NE_IO_EXTENT);
unregister_netdev(dev);
}
}
}
#endif /* MODULE */
/* Open/initialize the board. This routine goes all-out, setting everything
up anew at each open, even though many of these registers should only
need to be set once at boot.
*/
int ei_open(struct device *dev)
{
struct ei_device *ei_local = (struct ei_device *) dev->priv;
/* This can't happen unless somebody forgot to call ethdev_init(). */
if (ei_local == NULL) {
printk(KERN_EMERG "%s: ei_open passed a non-existent device!\n", dev->name);
return -ENXIO;
}
irq2dev_map[dev->irq] = dev;
NS8390_init(dev, 1);
dev->start = 1;
ei_local->irqlock = 0;
return 0;
}
/* Opposite of above. Only used when "ifconfig <devname> down" is done. */
int ei_close(struct device *dev)
{
NS8390_init(dev, 0);
dev->start = 0;
return 0;
}
static int ei_start_xmit(struct sk_buff *skb, struct device *dev)
{
int e8390_base = dev->base_addr;
struct ei_device *ei_local = (struct ei_device *) dev->priv;
int length, send_length, output_page;
/*
* We normally shouldn't be called if dev->tbusy is set, but the
* existing code does anyway. If it has been too long since the
* last Tx, we assume the board has died and kick it.
*/
if (dev->tbusy) { /* Do timeouts, just like the 8003 driver. */
int txsr = inb(e8390_base+EN0_TSR), isr;
int tickssofar = jiffies - dev->trans_start;
if (tickssofar < TX_TIMEOUT || (tickssofar < (TX_TIMEOUT+5) && ! (txsr & ENTSR_PTX))) {
return 1;
}
isr = inb(e8390_base+EN0_ISR);
if (dev->start == 0) {
printk("%s: xmit on stopped card\n", dev->name);
return 1;
}
/*
* Note that if the Tx posted a TX_ERR interrupt, then the
* error will have been handled from the interrupt handler.
* and not here.
*/
printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
(isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
if (!isr && !ei_local->stat.tx_packets) {
/* The 8390 probably hasn't gotten on the cable yet. */
ei_local->interface_num ^= 1; /* Try a different xcvr. */
}
/* Try to restart the card. Perhaps the user has fixed something. */
ei_reset_8390(dev);
NS8390_init(dev, 1);
dev->trans_start = jiffies;
}
/* Sending a NULL skb means some higher layer thinks we've missed an
tx-done interrupt. Caution: dev_tint() handles the cli()/sti()
itself. */
if (skb == NULL) {
dev_tint(dev);
return 0;
}
length = skb->len;
if (skb->len <= 0)
return 0;
/* Mask interrupts from the ethercard. */
outb_p(0x00, e8390_base + EN0_IMR);
if (dev->interrupt) {
printk("%s: Tx request while isr active.\n",dev->name);
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
return 1;
}
ei_local->irqlock = 1;
send_length = ETH_ZLEN < length ? length : ETH_ZLEN;
#ifdef EI_PINGPONG
/*
* We have two Tx slots available for use. Find the first free
* slot, and then perform some sanity checks. With two Tx bufs,
* you get very close to transmitting back-to-back packets. With
* only one Tx buf, the transmitter sits idle while you reload the
* card, leaving a substantial gap between each transmitted packet.
*/
if (ei_local->tx1 == 0) {
output_page = ei_local->tx_start_page;
ei_local->tx1 = send_length;
if (ei_debug && ei_local->tx2 > 0)
printk("%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
} else if (ei_local->tx2 == 0) {
output_page = ei_local->tx_start_page + TX_1X_PAGES;
ei_local->tx2 = send_length;
if (ei_debug && ei_local->tx1 > 0)
printk("%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
} else { /* We should never get here. */
if (ei_debug)
printk("%s: No Tx buffers free! irq=%d tx1=%d tx2=%d last=%d\n",
dev->name, dev->interrupt, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
ei_local->irqlock = 0;
dev->tbusy = 1;
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
return 1;
}
/*
* Okay, now upload the packet and trigger a send if the transmitter
* isn't already sending. If it is busy, the interrupt handler will
* trigger the send later, upon receiving a Tx done interrupt.
*/
ei_block_output(dev, length, skb->data, output_page);
if (! ei_local->txing) {
ei_local->txing = 1;
NS8390_trigger_send(dev, send_length, output_page);
dev->trans_start = jiffies;
if (output_page == ei_local->tx_start_page) {
ei_local->tx1 = -1;
ei_local->lasttx = -1;
} else {
ei_local->tx2 = -1;
ei_local->lasttx = -2;
}
} else
ei_local->txqueue++;
dev->tbusy = (ei_local->tx1 && ei_local->tx2);
#else /* EI_PINGPONG */
/*
* Only one Tx buffer in use. You need two Tx bufs to come close to
* back-to-back transmits. Expect a 20 -> 25% performance hit on
* reasonable hardware if you only use one Tx buffer.
*/
ei_block_output(dev, length, skb->data, ei_local->tx_start_page);
ei_local->txing = 1;
NS8390_trigger_send(dev, send_length, ei_local->tx_start_page);
dev->trans_start = jiffies;
dev->tbusy = 1;
#endif /* EI_PINGPONG */
/* Turn 8390 interrupts back on. */
ei_local->irqlock = 0;
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
dev_kfree_skb (skb, FREE_WRITE);
return 0;
}
/* The typical workload of the driver:
Handle the ether interface interrupts. */
void ei_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
struct device *dev = (struct device *)(irq2dev_map[irq]);
int e8390_base;
int interrupts, nr_serviced = 0;
struct ei_device *ei_local;
if (dev == NULL) {
printk ("net_interrupt(): irq %d for unknown device.\n", irq);
return;
}
e8390_base = dev->base_addr;
ei_local = (struct ei_device *) dev->priv;
if (dev->interrupt || ei_local->irqlock) {
/* The "irqlock" check is only for testing. */
printk(ei_local->irqlock
? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
: "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
dev->name, inb_p(e8390_base + EN0_ISR),
inb_p(e8390_base + EN0_IMR));
return;
}
dev->interrupt = 1;
/* Change to page 0 and read the intr status reg. */
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
if (ei_debug > 3)
printk("%s: interrupt(isr=%#2.2x).\n", dev->name,
inb_p(e8390_base + EN0_ISR));
/* !!Assumption!! -- we stay in page 0. Don't break this. */
while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
&& ++nr_serviced < MAX_SERVICE) {
if (dev->start == 0) {
printk("%s: interrupt from stopped card\n", dev->name);
interrupts = 0;
break;
}
if (interrupts & ENISR_OVER) {
ei_rx_overrun(dev);
} else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) {
/* Got a good (?) packet. */
ei_receive(dev);
}
/* Push the next to-transmit packet through. */
if (interrupts & ENISR_TX) {
ei_tx_intr(dev);
} else if (interrupts & ENISR_TX_ERR) {
ei_tx_err(dev);
}
if (interrupts & ENISR_COUNTERS) {
ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
}
/* Ignore any RDC interrupts that make it back to here. */
if (interrupts & ENISR_RDC) {
outb_p(ENISR_RDC, e8390_base + EN0_ISR);
}
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
}
if (interrupts && ei_debug) {
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
if (nr_serviced >= MAX_SERVICE) {
printk("%s: Too much work at interrupt, status %#2.2x\n",
dev->name, interrupts);
outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
} else {
printk("%s: unknown interrupt %#2x\n", dev->name, interrupts);
outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
}
}
dev->interrupt = 0;
return;
}
/*
* A transmitter error has happened. Most likely excess collisions (which
* is a fairly normal condition). If the error is one where the Tx will
* have been aborted, we try and send another one right away, instead of
* letting the failed packet sit and collect dust in the Tx buffer. This
* is a much better solution as it avoids kernel based Tx timeouts, and
* an unnecessary card reset.
*/
static void ei_tx_err(struct device *dev)
{
int e8390_base = dev->base_addr;
unsigned char txsr = inb_p(e8390_base+EN0_TSR);
unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
struct ei_device *ei_local = (struct ei_device *) dev->priv;
#ifdef VERBOSE_ERROR_DUMP
printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
if (txsr & ENTSR_ABT)
printk("excess-collisions ");
if (txsr & ENTSR_ND)
printk("non-deferral ");
if (txsr & ENTSR_CRS)
printk("lost-carrier ");
if (txsr & ENTSR_FU)
printk("FIFO-underrun ");
if (txsr & ENTSR_CDH)
printk("lost-heartbeat ");
printk("\n");
#endif
outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
if (tx_was_aborted)
ei_tx_intr(dev);
/*
* Note: NCR reads zero on 16 collisions so we add them
* in by hand. Somebody might care...
*/
if (txsr & ENTSR_ABT)
ei_local->stat.collisions += 16;
}
/* We have finished a transmit: check for errors and then trigger the next
packet to be sent. */
static void ei_tx_intr(struct device *dev)
{
int e8390_base = dev->base_addr;
int status = inb(e8390_base + EN0_TSR);
struct ei_device *ei_local = (struct ei_device *) dev->priv;
outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
#ifdef EI_PINGPONG
/*
* There are two Tx buffers, see which one finished, and trigger
* the send of another one if it exists.
*/
ei_local->txqueue--;
if (ei_local->tx1 < 0) {
if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
printk("%s: bogus last_tx_buffer %d, tx1=%d.\n",
ei_local->name, ei_local->lasttx, ei_local->tx1);
ei_local->tx1 = 0;
dev->tbusy = 0;
if (ei_local->tx2 > 0) {
ei_local->txing = 1;
NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
dev->trans_start = jiffies;
ei_local->tx2 = -1,
ei_local->lasttx = 2;
} else
ei_local->lasttx = 20, ei_local->txing = 0;
} else if (ei_local->tx2 < 0) {
if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
ei_local->name, ei_local->lasttx, ei_local->tx2);
ei_local->tx2 = 0;
dev->tbusy = 0;
if (ei_local->tx1 > 0) {
ei_local->txing = 1;
NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
dev->trans_start = jiffies;
ei_local->tx1 = -1;
ei_local->lasttx = 1;
} else
ei_local->lasttx = 10, ei_local->txing = 0;
} else
printk("%s: unexpected TX-done interrupt, lasttx=%d.\n",
dev->name, ei_local->lasttx);
#else /* EI_PINGPONG */
/*
* Single Tx buffer: mark it free so another packet can be loaded.
*/
ei_local->txing = 0;
dev->tbusy = 0;
#endif
/* Minimize Tx latency: update the statistics after we restart TXing. */
if (status & ENTSR_COL)
ei_local->stat.collisions++;
if (status & ENTSR_PTX)
ei_local->stat.tx_packets++;
else {
ei_local->stat.tx_errors++;
if (status & ENTSR_ABT) ei_local->stat.tx_aborted_errors++;
if (status & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
if (status & ENTSR_FU) ei_local->stat.tx_fifo_errors++;
if (status & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
if (status & ENTSR_OWC) ei_local->stat.tx_window_errors++;
}
mark_bh (NET_BH);
}
/* We have a good packet(s), get it/them out of the buffers. */
static void ei_receive(struct device *dev)
{
int e8390_base = dev->base_addr;
struct ei_device *ei_local = (struct ei_device *) dev->priv;
unsigned char rxing_page, this_frame, next_frame;
unsigned short current_offset;
int rx_pkt_count = 0;
struct e8390_pkt_hdr rx_frame;
int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
while (++rx_pkt_count < 10) {
int pkt_len;
/* Get the rx page (incoming packet pointer). */
outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
rxing_page = inb_p(e8390_base + EN1_CURPAG);
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
/* Remove one frame from the ring. Boundary is always a page behind. */
this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
if (this_frame >= ei_local->stop_page)
this_frame = ei_local->rx_start_page;
/* Someday we'll omit the previous, iff we never get this message.
(There is at least one clone claimed to have a problem.) */
if (ei_debug > 0 && this_frame != ei_local->current_page)
printk("%s: mismatched read page pointers %2x vs %2x.\n",
dev->name, this_frame, ei_local->current_page);
if (this_frame == rxing_page) /* Read all the frames? */
break; /* Done for now */
current_offset = this_frame << 8;
ei_get_8390_hdr(dev, &rx_frame, this_frame);
pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
next_frame = this_frame + 1 + ((pkt_len+4)>>8);
/* Check for bogosity warned by 3c503 book: the status byte is never
written. This happened a lot during testing! This code should be
cleaned up someday. */
if (rx_frame.next != next_frame
&& rx_frame.next != next_frame + 1
&& rx_frame.next != next_frame - num_rx_pages
&& rx_frame.next != next_frame + 1 - num_rx_pages) {
ei_local->current_page = rxing_page;
outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
ei_local->stat.rx_errors++;
continue;
}
if (pkt_len < 60 || pkt_len > 1518) {
if (ei_debug)
printk("%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
dev->name, rx_frame.count, rx_frame.status,
rx_frame.next);
ei_local->stat.rx_errors++;
} else if ((rx_frame.status & 0x0F) == ENRSR_RXOK) {
struct sk_buff *skb;
skb = dev_alloc_skb(pkt_len+2);
if (skb == NULL) {
if (ei_debug > 1)
printk("%s: Couldn't allocate a sk_buff of size %d.\n",
dev->name, pkt_len);
ei_local->stat.rx_dropped++;
break;
} else {
skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
skb->dev = dev;
skb_put(skb, pkt_len); /* Make room */
ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
skb->protocol=eth_type_trans(skb,dev);
netif_rx(skb);
ei_local->stat.rx_packets++;
}
} else {
int errs = rx_frame.status;
if (ei_debug)
printk("%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
dev->name, rx_frame.status, rx_frame.next,
rx_frame.count);
if (errs & ENRSR_FO)
ei_local->stat.rx_fifo_errors++;
}
next_frame = rx_frame.next;
/* This _should_ never happen: it's here for avoiding bad clones. */
if (next_frame >= ei_local->stop_page) {
printk("%s: next frame inconsistency, %#2x\n", dev->name,
next_frame);
next_frame = ei_local->rx_start_page;
}
ei_local->current_page = next_frame;
outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
}
/* We used to also ack ENISR_OVER here, but that would sometimes mask
a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
return;
}
/*
* We have a receiver overrun: we have to kick the 8390 to get it started
* again. Problem is that you have to kick it exactly as NS prescribes in
* the updated datasheets, or "the NIC may act in an unpredictable manner."
* This includes causing "the NIC to defer indefinitely when it is stopped
* on a busy network." Ugh.
*/
static void ei_rx_overrun(struct device *dev)
{
int e8390_base = dev->base_addr;
unsigned long wait_start_time;
unsigned char was_txing, must_resend = 0;
struct ei_device *ei_local = (struct ei_device *) dev->priv;
/*
* Record whether a Tx was in progress and then issue the
* stop command.
*/
was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
if (ei_debug > 1)
printk("%s: Receiver overrun.\n", dev->name);
ei_local->stat.rx_over_errors++;
/*
* Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
* Early datasheets said to poll the reset bit, but now they say that
* it "is not a reliable indicator and subsequently should be ignored."
* We wait at least 10ms.
*/
wait_start_time = jiffies;
while (jiffies - wait_start_time <= 1*HZ/100)
barrier();
/*
* Reset RBCR[01] back to zero as per magic incantation.
*/
outb_p(0x00, e8390_base+EN0_RCNTLO);
outb_p(0x00, e8390_base+EN0_RCNTHI);
/*
* See if any Tx was interrupted or not. According to NS, this
* step is vital, and skipping it will cause no end of havoc.
*/
if (was_txing) {
unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
if (!tx_completed) must_resend = 1;
}
/*
* Have to enter loopback mode and then restart the NIC before
* you are allowed to slurp packets up off the ring.
*/
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
/*
* Clear the Rx ring of all the debris, and ack the interrupt.
*/
ei_receive(dev);
outb_p(ENISR_OVER, e8390_base+EN0_ISR);
/*
* Leave loopback mode, and resend any packet that got stopped.
*/
outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
if (must_resend)
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
}
static struct enet_statistics *get_stats(struct device *dev)
{
short ioaddr = dev->base_addr;
struct ei_device *ei_local = (struct ei_device *) dev->priv;
/* If the card is stopped, just return the present stats. */
if (dev->start == 0) return &ei_local->stat;
/* Read the counter registers, assuming we are in page 0. */
ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
return &ei_local->stat;
}
/*
* Set or clear the multicast filter for this adaptor.
*/
static void set_multicast_list(struct device *dev)
{
short ioaddr = dev->base_addr;
if(dev->flags&IFF_PROMISC)
{
outb_p(E8390_RXCONFIG | 0x18, ioaddr + EN0_RXCR);
}
else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
{
/* The multicast-accept list is initialized to accept-all, and we
rely on higher-level filtering for now. */
outb_p(E8390_RXCONFIG | 0x08, ioaddr + EN0_RXCR);
}
else
outb_p(E8390_RXCONFIG, ioaddr + EN0_RXCR);
}
/* Initialize the rest of the 8390 device structure. */
int ethdev_init(struct device *dev)
{
if (ei_debug > 1)
printk(version);
if (dev->priv == NULL) {
struct ei_device *ei_local;
dev->priv = kmalloc(sizeof(struct ei_device), GFP_KERNEL);
if (dev->priv == NULL)
return -ENOMEM;
memset(dev->priv, 0, sizeof(struct ei_device));
ei_local = (struct ei_device *)dev->priv;
}
dev->hard_start_xmit = &ei_start_xmit;
dev->get_stats = get_stats;
dev->set_multicast_list = &set_multicast_list;
ether_setup(dev);
return 0;
}
/* This page of functions should be 8390 generic */
/* Follow National Semi's recommendations for initializing the "NIC". */
void NS8390_init(struct device *dev, int startp)
{
int e8390_base = dev->base_addr;
struct ei_device *ei_local = (struct ei_device *) dev->priv;
int i;
int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
unsigned long flags;
/* Follow National Semi's recommendations for initing the DP83902. */
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base); /* 0x21 */
outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
/* Clear the remote byte count registers. */
outb_p(0x00, e8390_base + EN0_RCNTLO);
outb_p(0x00, e8390_base + EN0_RCNTHI);
/* Set to monitor and loopback mode -- this is vital!. */
outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
/* Set the transmit page and receive ring. */
outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
ei_local->tx1 = ei_local->tx2 = 0;
outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
/* Clear the pending interrupts and mask. */
outb_p(0xFF, e8390_base + EN0_ISR);
outb_p(0x00, e8390_base + EN0_IMR);
/* Copy the station address into the DS8390 registers,
and set the multicast hash bitmap to receive all multicasts. */
save_flags(flags);
cli();
outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base); /* 0x61 */
for(i = 0; i < 6; i++) {
outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS + i);
}
/* Initialize the multicast list to accept-all. If we enable multicast
the higher levels can do the filtering. */
for(i = 0; i < 8; i++)
outb_p(0xff, e8390_base + EN1_MULT + i);
outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base);
restore_flags(flags);
dev->tbusy = 0;
dev->interrupt = 0;
ei_local->tx1 = ei_local->tx2 = 0;
ei_local->txing = 0;
if (startp) {
outb_p(0xff, e8390_base + EN0_ISR);
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base);
outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
/* 3c503 TechMan says rxconfig only after the NIC is started. */
outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
dev->set_multicast_list(dev); /* Get the multicast status right if this
was a reset. */
}
return;
}
/* Trigger a transmit start, assuming the length is valid. */
static void NS8390_trigger_send(struct device *dev, unsigned int length,
int start_page)
{
int e8390_base = dev->base_addr;
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base);
if (inb_p(e8390_base) & E8390_TRANS) {
printk("%s: trigger_send() called with the transmitter busy.\n",
dev->name);
return;
}
outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
outb_p(length >> 8, e8390_base + EN0_TCNTHI);
outb_p(start_page, e8390_base + EN0_TPSR);
outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base);
return;
}
/*
* Local variables:
* compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne.c"
* version-control: t
* kept-new-versions: 5
* End:
*/
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- From: "Paul J. Keenan" <paul.keenan@motorola.com>