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linux/drivers/net/fmv18x.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

690 lines
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/* fmv18x.c: A network device driver for the Fujitsu FMV-181/182/183/184.
Original: at1700.c (1993-94 by Donald Becker).
Copyright 1993 United States Government as represented by the
Director, National Security Agency.
The author may be reached as becker@scyld.com, or C/O
Scyld Computing Corporation
410 Severn Ave., Suite 210
Annapolis MD 21403
Modified by Yutaka TAMIYA (tamy@flab.fujitsu.co.jp)
Copyright 1994 Fujitsu Laboratories Ltd.
Special thanks to:
Masayoshi UTAKA (utaka@ace.yk.fujitsu.co.jp)
for testing this driver.
H. NEGISHI (agy, negishi@sun45.psd.cs.fujitsu.co.jp)
for suggestion of some program modification.
Masahiro SEKIGUCHI <seki@sysrap.cs.fujitsu.co.jp>
for suggestion of some program modification.
Kazutoshi MORIOKA (morioka@aurora.oaks.cs.fujitsu.co.jp)
for testing this driver.
This software may be used and distributed according to the terms
of the GNU General Public License, incorporated herein by reference.
This is a device driver for the Fujitsu FMV-181/182/183/184, which
is a straight-forward Fujitsu MB86965 implementation.
Sources:
at1700.c
The Fujitsu MB86965 datasheet.
The Fujitsu FMV-181/182 user's guide
*/
static const char version[] =
"fmv18x.c:v2.2.0 09/24/98 Yutaka TAMIYA (tamy@flab.fujitsu.co.jp)\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#define DRV_NAME "fmv18x"
static unsigned fmv18x_probe_list[] __initdata = {
0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0
};
/* use 0 for production, 1 for verification, >2 for debug */
#ifndef NET_DEBUG
#define NET_DEBUG 1
#endif
static unsigned int net_debug = NET_DEBUG;
typedef unsigned char uchar;
/* Information that need to be kept for each board. */
struct net_local {
struct net_device_stats stats;
long open_time; /* Useless example local info. */
uint tx_started:1; /* Number of packet on the Tx queue. */
uint tx_queue_ready:1; /* Tx queue is ready to be sent. */
uint rx_started:1; /* Packets are Rxing. */
uchar tx_queue; /* Number of packet on the Tx queue. */
ushort tx_queue_len; /* Current length of the Tx queue. */
spinlock_t lock;
};
/* Offsets from the base address. */
#define STATUS 0
#define TX_STATUS 0
#define RX_STATUS 1
#define TX_INTR 2 /* Bit-mapped interrupt enable registers. */
#define RX_INTR 3
#define TX_MODE 4
#define RX_MODE 5
#define CONFIG_0 6 /* Misc. configuration settings. */
#define CONFIG_1 7
/* Run-time register bank 2 definitions. */
#define DATAPORT 8 /* Word-wide DMA or programmed-I/O dataport. */
#define TX_START 10
#define COL16CNTL 11 /* Controll Reg for 16 collisions */
#define MODE13 13
/* Fujitsu FMV-18x Card Configuration */
#define FJ_STATUS0 0x10
#define FJ_STATUS1 0x11
#define FJ_CONFIG0 0x12
#define FJ_CONFIG1 0x13
#define FJ_MACADDR 0x14 /* 0x14 - 0x19 */
#define FJ_BUFCNTL 0x1A
#define FJ_BUFDATA 0x1C
#define FMV18X_IO_EXTENT 32
/* Index to functions, as function prototypes. */
static int fmv18x_probe1(struct net_device *dev, short ioaddr);
static int net_open(struct net_device *dev);
static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static void net_rx(struct net_device *dev);
static void net_timeout(struct net_device *dev);
static int net_close(struct net_device *dev);
static struct net_device_stats *net_get_stats(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
/* Check for a network adaptor of this type, and return '0' iff one exists.
If dev->base_addr == 0, probe all likely locations.
If dev->base_addr == 1, always return failure.
If dev->base_addr == 2, allocate space for the device and return success
(detachable devices only).
*/
static int io = 0x220;
static int irq;
struct net_device * __init fmv18x_probe(int unit)
{
struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
unsigned *port;
int err = 0;
if (!dev)
return ERR_PTR(-ENODEV);
if (unit >= 0) {
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
io = dev->base_addr;
irq = dev->irq;
}
SET_MODULE_OWNER(dev);
if (io > 0x1ff) { /* Check a single specified location. */
err = fmv18x_probe1(dev, io);
} else if (io != 0) { /* Don't probe at all. */
err = -ENXIO;
} else {
for (port = fmv18x_probe_list; *port; port++)
if (fmv18x_probe1(dev, *port) == 0)
break;
if (!*port)
err = -ENODEV;
}
if (err)
goto out;
err = register_netdev(dev);
if (err)
goto out1;
return dev;
out1:
free_irq(dev->irq, dev);
release_region(dev->base_addr, FMV18X_IO_EXTENT);
out:
free_netdev(dev);
return ERR_PTR(err);
}
/* The Fujitsu datasheet suggests that the NIC be probed for by checking its
"signature", the default bit pattern after a reset. This *doesn't* work --
there is no way to reset the bus interface without a complete power-cycle!
It turns out that ATI came to the same conclusion I did: the only thing
that can be done is checking a few bits and then diving right into MAC
address check. */
static int __init fmv18x_probe1(struct net_device *dev, short ioaddr)
{
char irqmap[4] = {3, 7, 10, 15};
char irqmap_pnp[8] = {3, 4, 5, 7, 9, 10, 11, 15};
unsigned int i, retval;
struct net_local *lp;
/* Resetting the chip doesn't reset the ISA interface, so don't bother.
That means we have to be careful with the register values we probe for.
*/
if (!request_region(ioaddr, FMV18X_IO_EXTENT, DRV_NAME))
return -EBUSY;
dev->irq = irq;
dev->base_addr = ioaddr;
/* Check I/O address configuration and Fujitsu vendor code */
if (inb(ioaddr+FJ_MACADDR ) != 0x00
|| inb(ioaddr+FJ_MACADDR+1) != 0x00
|| inb(ioaddr+FJ_MACADDR+2) != 0x0e) {
retval = -ENODEV;
goto out;
}
/* Check PnP mode for FMV-183/184/183A/184A. */
/* This PnP routine is very poor. IO and IRQ should be known. */
if (inb(ioaddr + FJ_STATUS1) & 0x20) {
for (i = 0; i < 8; i++) {
if (dev->irq == irqmap_pnp[i])
break;
}
if (i == 8) {
retval = -ENODEV;
goto out;
}
} else {
if (fmv18x_probe_list[inb(ioaddr + FJ_CONFIG0) & 0x07] != ioaddr)
return -ENODEV;
dev->irq = irqmap[(inb(ioaddr + FJ_CONFIG0)>>6) & 0x03];
}
/* Snarf the interrupt vector now. */
retval = request_irq(dev->irq, &net_interrupt, 0, DRV_NAME, dev);
if (retval) {
printk ("FMV-18x found at %#3x, but it's unusable due to a conflict on"
"IRQ %d.\n", ioaddr, dev->irq);
goto out;
}
printk("%s: FMV-18x found at %#3x, IRQ %d, address ", dev->name,
ioaddr, dev->irq);
for(i = 0; i < 6; i++) {
unsigned char val = inb(ioaddr + FJ_MACADDR + i);
printk("%02x", val);
dev->dev_addr[i] = val;
}
/* "FJ_STATUS0" 12 bit 0x0400 means use regular 100 ohm 10baseT signals,
rather than 150 ohm shielded twisted pair compensation.
0x0000 == auto-sense the interface
0x0800 == use TP interface
0x1800 == use coax interface
*/
{
const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2/5"};
ushort setup_value = inb(ioaddr + FJ_STATUS0);
switch( setup_value & 0x07 ){
case 0x01 /* 10base5 */:
case 0x02 /* 10base2 */: dev->if_port = 0x18; break;
case 0x04 /* 10baseT */: dev->if_port = 0x08; break;
default /* auto-sense*/: dev->if_port = 0x00; break;
}
printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]);
}
/* Initialize LAN Controller and LAN Card */
outb(0xda, ioaddr + CONFIG_0); /* Initialize LAN Controller */
outb(0x00, ioaddr + CONFIG_1); /* Stand by mode */
outb(0x00, ioaddr + FJ_CONFIG1); /* Disable IRQ of LAN Card */
outb(0x00, ioaddr + FJ_BUFCNTL); /* Reset ? I'm not sure (TAMIYA) */
/* wait for a while */
udelay(200);
/* Set the station address in bank zero. */
outb(0x00, ioaddr + CONFIG_1);
for (i = 0; i < 6; i++)
outb(dev->dev_addr[i], ioaddr + 8 + i);
/* Switch to bank 1 and set the multicast table to accept none. */
outb(0x04, ioaddr + CONFIG_1);
for (i = 0; i < 8; i++)
outb(0x00, ioaddr + 8 + i);
/* Switch to bank 2 and lock our I/O address. */
outb(0x08, ioaddr + CONFIG_1);
outb(dev->if_port, ioaddr + MODE13);
outb(0x00, ioaddr + COL16CNTL);
if (net_debug)
printk(version);
/* Initialize the device structure. */
dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
if (!dev->priv) {
retval = -ENOMEM;
goto out_irq;
}
memset(dev->priv, 0, sizeof(struct net_local));
lp = dev->priv;
spin_lock_init(&lp->lock);
dev->open = net_open;
dev->stop = net_close;
dev->hard_start_xmit = net_send_packet;
dev->tx_timeout = net_timeout;
dev->watchdog_timeo = HZ/10;
dev->get_stats = net_get_stats;
dev->set_multicast_list = set_multicast_list;
return 0;
out_irq:
free_irq(dev->irq, dev);
out:
release_region(ioaddr, FMV18X_IO_EXTENT);
return retval;
}
static int net_open(struct net_device *dev)
{
struct net_local *lp = dev->priv;
int ioaddr = dev->base_addr;
/* Set the configuration register 0 to 32K 100ns. byte-wide memory,
16 bit bus access, and two 4K Tx, enable the Rx and Tx. */
outb(0x5a, ioaddr + CONFIG_0);
/* Powerup and switch to register bank 2 for the run-time registers. */
outb(0xe8, ioaddr + CONFIG_1);
lp->tx_started = 0;
lp->tx_queue_ready = 1;
lp->rx_started = 0;
lp->tx_queue = 0;
lp->tx_queue_len = 0;
/* Clear Tx and Rx Status */
outb(0xff, ioaddr + TX_STATUS);
outb(0xff, ioaddr + RX_STATUS);
lp->open_time = jiffies;
netif_start_queue(dev);
/* Enable the IRQ of the LAN Card */
outb(0x80, ioaddr + FJ_CONFIG1);
/* Enable both Tx and Rx interrupts */
outw(0x8182, ioaddr+TX_INTR);
return 0;
}
static void net_timeout(struct net_device *dev)
{
struct net_local *lp = dev->priv;
int ioaddr = dev->base_addr;
unsigned long flags;
printk(KERN_WARNING "%s: transmit timed out with status %04x, %s?\n", dev->name,
htons(inw(ioaddr + TX_STATUS)),
inb(ioaddr + TX_STATUS) & 0x80
? "IRQ conflict" : "network cable problem");
printk(KERN_WARNING "%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n",
dev->name, htons(inw(ioaddr + 0)),
htons(inw(ioaddr + 2)), htons(inw(ioaddr + 4)),
htons(inw(ioaddr + 6)), htons(inw(ioaddr + 8)),
htons(inw(ioaddr +10)), htons(inw(ioaddr +12)),
htons(inw(ioaddr +14)));
printk(KERN_WARNING "eth card: %04x %04x\n",
htons(inw(ioaddr+FJ_STATUS0)),
htons(inw(ioaddr+FJ_CONFIG0)));
lp->stats.tx_errors++;
/* ToDo: We should try to restart the adaptor... */
spin_lock_irqsave(&lp->lock, flags);
/* Initialize LAN Controller and LAN Card */
outb(0xda, ioaddr + CONFIG_0); /* Initialize LAN Controller */
outb(0x00, ioaddr + CONFIG_1); /* Stand by mode */
outb(0x00, ioaddr + FJ_CONFIG1); /* Disable IRQ of LAN Card */
outb(0x00, ioaddr + FJ_BUFCNTL); /* Reset ? I'm not sure */
net_open(dev);
spin_unlock_irqrestore(&lp->lock, flags);
netif_wake_queue(dev);
}
static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
{
struct net_local *lp = dev->priv;
int ioaddr = dev->base_addr;
short length = skb->len;
unsigned char *buf;
unsigned long flags;
/* Block a transmit from overlapping. */
if (length > ETH_FRAME_LEN) {
if (net_debug)
printk("%s: Attempting to send a large packet (%d bytes).\n",
dev->name, length);
return 1;
}
if (length < ETH_ZLEN) {
skb = skb_padto(skb, ETH_ZLEN);
if (skb == NULL)
return 0;
length = ETH_ZLEN;
}
buf = skb->data;
if (net_debug > 4)
printk("%s: Transmitting a packet of length %lu.\n", dev->name,
(unsigned long)skb->len);
/* We may not start transmitting unless we finish transferring
a packet into the Tx queue. During executing the following
codes we possibly catch a Tx interrupt. Thus we flag off
tx_queue_ready, so that we prevent the interrupt routine
(net_interrupt) to start transmitting. */
spin_lock_irqsave(&lp->lock, flags);
lp->tx_queue_ready = 0;
{
outw(length, ioaddr + DATAPORT);
outsw(ioaddr + DATAPORT, buf, (length + 1) >> 1);
lp->tx_queue++;
lp->tx_queue_len += length + 2;
}
lp->tx_queue_ready = 1;
spin_unlock_irqrestore(&lp->lock, flags);
if (lp->tx_started == 0) {
/* If the Tx is idle, always trigger a transmit. */
outb(0x80 | lp->tx_queue, ioaddr + TX_START);
lp->tx_queue = 0;
lp->tx_queue_len = 0;
dev->trans_start = jiffies;
lp->tx_started = 1;
} else if (lp->tx_queue_len >= 4096 - 1502) /* No room for a packet */
netif_stop_queue(dev);
dev_kfree_skb(skb);
return 0;
}
/* The typical workload of the driver:
Handle the network interface interrupts. */
static irqreturn_t
net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = dev_id;
struct net_local *lp;
int ioaddr, status;
ioaddr = dev->base_addr;
lp = dev->priv;
status = inw(ioaddr + TX_STATUS);
outw(status, ioaddr + TX_STATUS);
if (net_debug > 4)
printk("%s: Interrupt with status %04x.\n", dev->name, status);
if (lp->rx_started == 0 &&
(status & 0xff00 || (inb(ioaddr + RX_MODE) & 0x40) == 0)) {
/* Got a packet(s).
We cannot execute net_rx more than once at the same time for
the same device. During executing net_rx, we possibly catch a
Tx interrupt. Thus we flag on rx_started, so that we prevent
the interrupt routine (net_interrupt) to dive into net_rx
again. */
lp->rx_started = 1;
outb(0x00, ioaddr + RX_INTR); /* Disable RX intr. */
net_rx(dev);
outb(0x81, ioaddr + RX_INTR); /* Enable RX intr. */
lp->rx_started = 0;
}
if (status & 0x00ff) {
if (status & 0x02) {
/* More than 16 collisions occurred */
if (net_debug > 4)
printk("%s: 16 Collision occur during Txing.\n", dev->name);
/* Cancel sending a packet. */
outb(0x03, ioaddr + COL16CNTL);
lp->stats.collisions++;
}
if (status & 0x82) {
spin_lock(&lp->lock);
lp->stats.tx_packets++;
if (lp->tx_queue && lp->tx_queue_ready) {
outb(0x80 | lp->tx_queue, ioaddr + TX_START);
lp->tx_queue = 0;
lp->tx_queue_len = 0;
dev->trans_start = jiffies;
netif_wake_queue(dev); /* Inform upper layers. */
} else {
lp->tx_started = 0;
netif_wake_queue(dev); /* Inform upper layers. */
}
spin_unlock(&lp->lock);
}
}
return IRQ_RETVAL(status);
}
/* We have a good packet(s), get it/them out of the buffers. */
static void net_rx(struct net_device *dev)
{
struct net_local *lp = dev->priv;
int ioaddr = dev->base_addr;
int boguscount = 5;
while ((inb(ioaddr + RX_MODE) & 0x40) == 0) {
/* Clear PKT_RDY bit: by agy 19940922 */
/* outb(0x80, ioaddr + RX_STATUS); */
ushort status = inw(ioaddr + DATAPORT);
if (net_debug > 4)
printk("%s: Rxing packet mode %02x status %04x.\n",
dev->name, inb(ioaddr + RX_MODE), status);
#ifndef final_version
if (status == 0) {
outb(0x05, ioaddr + 14);
break;
}
#endif
if ((status & 0xF0) != 0x20) { /* There was an error. */
lp->stats.rx_errors++;
if (status & 0x08) lp->stats.rx_length_errors++;
if (status & 0x04) lp->stats.rx_frame_errors++;
if (status & 0x02) lp->stats.rx_crc_errors++;
if (status & 0x01) lp->stats.rx_over_errors++;
} else {
ushort pkt_len = inw(ioaddr + DATAPORT);
/* Malloc up new buffer. */
struct sk_buff *skb;
if (pkt_len > 1550) {
printk("%s: The FMV-18x claimed a very large packet, size %d.\n",
dev->name, pkt_len);
outb(0x05, ioaddr + 14);
lp->stats.rx_errors++;
break;
}
skb = dev_alloc_skb(pkt_len+3);
if (skb == NULL) {
printk("%s: Memory squeeze, dropping packet (len %d).\n",
dev->name, pkt_len);
outb(0x05, ioaddr + 14);
lp->stats.rx_dropped++;
break;
}
skb->dev = dev;
skb_reserve(skb,2);
insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1);
if (net_debug > 5) {
int i;
printk("%s: Rxed packet of length %d: ", dev->name, pkt_len);
for (i = 0; i < 14; i++)
printk(" %02x", skb->data[i]);
printk(".\n");
}
skb->protocol=eth_type_trans(skb, dev);
netif_rx(skb);
dev->last_rx = jiffies;
lp->stats.rx_packets++;
lp->stats.rx_bytes += pkt_len;
}
if (--boguscount <= 0)
break;
}
/* If any worth-while packets have been received, dev_rint()
has done a mark_bh(NET_BH) for us and will work on them
when we get to the bottom-half routine. */
{
int i;
for (i = 0; i < 20; i++) {
if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40)
break;
(void)inw(ioaddr + DATAPORT); /* dummy status read */
outb(0x05, ioaddr + 14);
}
if (net_debug > 5 && i > 0)
printk("%s: Exint Rx packet with mode %02x after %d ticks.\n",
dev->name, inb(ioaddr + RX_MODE), i);
}
return;
}
/* The inverse routine to net_open(). */
static int net_close(struct net_device *dev)
{
int ioaddr = dev->base_addr;
((struct net_local *)dev->priv)->open_time = 0;
netif_stop_queue(dev);
/* Set configuration register 0 to disable Tx and Rx. */
outb(0xda, ioaddr + CONFIG_0);
/* Update the statistics -- ToDo. */
/* Power-down the chip. Green, green, green! */
outb(0x00, ioaddr + CONFIG_1);
/* Set the ethernet adaptor disable IRQ */
outb(0x00, ioaddr + FJ_CONFIG1);
return 0;
}
/* Get the current statistics. This may be called with the card open or
closed. */
static struct net_device_stats *net_get_stats(struct net_device *dev)
{
struct net_local *lp = dev->priv;
return &lp->stats;
}
/* Set or clear the multicast filter for this adaptor.
num_addrs == -1 Promiscuous mode, receive all packets
num_addrs == 0 Normal mode, clear multicast list
num_addrs > 0 Multicast mode, receive normal and MC packets, and do
best-effort filtering.
*/
static void set_multicast_list(struct net_device *dev)
{
short ioaddr = dev->base_addr;
if (dev->mc_count || dev->flags&(IFF_PROMISC|IFF_ALLMULTI))
{
/*
* We must make the kernel realise we had to move
* into promisc mode or we start all out war on
* the cable. - AC
*/
dev->flags|=IFF_PROMISC;
outb(3, ioaddr + RX_MODE); /* Enable promiscuous mode */
}
else
outb(2, ioaddr + RX_MODE); /* Disable promiscuous, use normal mode */
}
#ifdef MODULE
static struct net_device *dev_fmv18x;
MODULE_PARM(io, "i");
MODULE_PARM(irq, "i");
MODULE_PARM(net_debug, "i");
MODULE_PARM_DESC(io, "FMV-18X I/O address");
MODULE_PARM_DESC(irq, "FMV-18X IRQ number");
MODULE_PARM_DESC(net_debug, "FMV-18X debug level (0-1,5-6)");
MODULE_LICENSE("GPL");
int init_module(void)
{
if (io == 0)
printk("fmv18x: You should not use auto-probing with insmod!\n");
dev_fmv18x = fmv18x_probe(-1);
if (IS_ERR(dev_fmv18x))
return PTR_ERR(dev_fmv18x);
return 0;
}
void
cleanup_module(void)
{
unregister_netdev(dev_fmv18x);
free_irq(dev_fmv18x->irq, dev_fmv18x);
release_region(dev_fmv18x->base_addr, FMV18X_IO_EXTENT);
free_netdev(dev_fmv18x);
}
#endif /* MODULE */
/*
* Local variables:
* compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c fmv18x.c"
* version-control: t
* kept-new-versions: 5
* tab-width: 4
* c-indent-level: 4
* End:
*/
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