/* 3c574.c: A PCMCIA ethernet driver for the 3com 3c574 "RoadRunner".
|
|
Written 1993-1998 by
|
Donald Becker, becker@scyld.com, (driver core) and
|
David Hinds, dahinds@users.sourceforge.net (from his PC card code).
|
Locking fixes (C) Copyright 2003 Red Hat Inc
|
|
This software may be used and distributed according to the terms of
|
the GNU General Public License, incorporated herein by reference.
|
|
This driver derives from Donald Becker's 3c509 core, which has the
|
following copyright:
|
Copyright 1993 United States Government as represented by the
|
Director, National Security Agency.
|
|
|
*/
|
|
/*
|
Theory of Operation
|
|
I. Board Compatibility
|
|
This device driver is designed for the 3Com 3c574 PC card Fast Ethernet
|
Adapter.
|
|
II. Board-specific settings
|
|
None -- PC cards are autoconfigured.
|
|
III. Driver operation
|
|
The 3c574 uses a Boomerang-style interface, without the bus-master capability.
|
See the Boomerang driver and documentation for most details.
|
|
IV. Notes and chip documentation.
|
|
Two added registers are used to enhance PIO performance, RunnerRdCtrl and
|
RunnerWrCtrl. These are 11 bit down-counters that are preloaded with the
|
count of word (16 bits) reads or writes the driver is about to do to the Rx
|
or Tx FIFO. The chip is then able to hide the internal-PCI-bus to PC-card
|
translation latency by buffering the I/O operations with an 8 word FIFO.
|
Note: No other chip accesses are permitted when this buffer is used.
|
|
A second enhancement is that both attribute and common memory space
|
0x0800-0x0fff can translated to the PIO FIFO. Thus memory operations (faster
|
with *some* PCcard bridges) may be used instead of I/O operations.
|
This is enabled by setting the 0x10 bit in the PCMCIA LAN COR.
|
|
Some slow PC card bridges work better if they never see a WAIT signal.
|
This is configured by setting the 0x20 bit in the PCMCIA LAN COR.
|
Only do this after testing that it is reliable and improves performance.
|
|
The upper five bits of RunnerRdCtrl are used to window into PCcard
|
configuration space registers. Window 0 is the regular Boomerang/Odie
|
register set, 1-5 are various PC card control registers, and 16-31 are
|
the (reversed!) CIS table.
|
|
A final note: writing the InternalConfig register in window 3 with an
|
invalid ramWidth is Very Bad.
|
|
V. References
|
|
http://www.scyld.com/expert/NWay.html
|
http://www.national.com/opf/DP/DP83840A.html
|
|
Thanks to Terry Murphy of 3Com for providing development information for
|
earlier 3Com products.
|
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
#include <linux/module.h>
|
#include <linux/kernel.h>
|
#include <linux/slab.h>
|
#include <linux/string.h>
|
#include <linux/timer.h>
|
#include <linux/interrupt.h>
|
#include <linux/in.h>
|
#include <linux/delay.h>
|
#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/skbuff.h>
|
#include <linux/if_arp.h>
|
#include <linux/ioport.h>
|
#include <linux/bitops.h>
|
#include <linux/mii.h>
|
|
#include <pcmcia/cistpl.h>
|
#include <pcmcia/cisreg.h>
|
#include <pcmcia/ciscode.h>
|
#include <pcmcia/ds.h>
|
|
#include <linux/uaccess.h>
|
#include <asm/io.h>
|
|
/*====================================================================*/
|
|
/* Module parameters */
|
|
MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
|
MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver");
|
MODULE_LICENSE("GPL");
|
|
#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
|
|
/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
|
INT_MODULE_PARM(max_interrupt_work, 32);
|
|
/* Force full duplex modes? */
|
INT_MODULE_PARM(full_duplex, 0);
|
|
/* Autodetect link polarity reversal? */
|
INT_MODULE_PARM(auto_polarity, 1);
|
|
|
/*====================================================================*/
|
|
/* Time in jiffies before concluding the transmitter is hung. */
|
#define TX_TIMEOUT ((800*HZ)/1000)
|
|
/* To minimize the size of the driver source and make the driver more
|
readable not all constants are symbolically defined.
|
You'll need the manual if you want to understand driver details anyway. */
|
/* Offsets from base I/O address. */
|
#define EL3_DATA 0x00
|
#define EL3_CMD 0x0e
|
#define EL3_STATUS 0x0e
|
|
#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
|
|
/* The top five bits written to EL3_CMD are a command, the lower
|
11 bits are the parameter, if applicable. */
|
enum el3_cmds {
|
TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
|
RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
|
TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
|
FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
|
SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
|
SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
|
StatsDisable = 22<<11, StopCoax = 23<<11,
|
};
|
|
enum elxl_status {
|
IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
|
TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
|
IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000 };
|
|
/* The SetRxFilter command accepts the following classes: */
|
enum RxFilter {
|
RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
|
};
|
|
enum Window0 {
|
Wn0EepromCmd = 10, Wn0EepromData = 12, /* EEPROM command/address, data. */
|
IntrStatus=0x0E, /* Valid in all windows. */
|
};
|
/* These assumes the larger EEPROM. */
|
enum Win0_EEPROM_cmds {
|
EEPROM_Read = 0x200, EEPROM_WRITE = 0x100, EEPROM_ERASE = 0x300,
|
EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */
|
EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */
|
};
|
|
/* Register window 1 offsets, the window used in normal operation.
|
On the "Odie" this window is always mapped at offsets 0x10-0x1f.
|
Except for TxFree, which is overlapped by RunnerWrCtrl. */
|
enum Window1 {
|
TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
|
RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B,
|
TxFree = 0x0C, /* Remaining free bytes in Tx buffer. */
|
RunnerRdCtrl = 0x16, RunnerWrCtrl = 0x1c,
|
};
|
|
enum Window3 { /* Window 3: MAC/config bits. */
|
Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8,
|
};
|
enum wn3_config {
|
Ram_size = 7,
|
Ram_width = 8,
|
Ram_speed = 0x30,
|
Rom_size = 0xc0,
|
Ram_split_shift = 16,
|
Ram_split = 3 << Ram_split_shift,
|
Xcvr_shift = 20,
|
Xcvr = 7 << Xcvr_shift,
|
Autoselect = 0x1000000,
|
};
|
|
enum Window4 { /* Window 4: Xcvr/media bits. */
|
Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10,
|
};
|
|
#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
|
|
struct el3_private {
|
struct pcmcia_device *p_dev;
|
u16 advertising, partner; /* NWay media advertisement */
|
unsigned char phys; /* MII device address */
|
unsigned int autoselect:1, default_media:3; /* Read from the EEPROM/Wn3_Config. */
|
/* for transceiver monitoring */
|
struct timer_list media;
|
unsigned short media_status;
|
unsigned short fast_poll;
|
unsigned long last_irq;
|
spinlock_t window_lock; /* Guards the Window selection */
|
};
|
|
/* Set iff a MII transceiver on any interface requires mdio preamble.
|
This only set with the original DP83840 on older 3c905 boards, so the extra
|
code size of a per-interface flag is not worthwhile. */
|
static char mii_preamble_required = 0;
|
|
/* Index of functions. */
|
|
static int tc574_config(struct pcmcia_device *link);
|
static void tc574_release(struct pcmcia_device *link);
|
|
static void mdio_sync(unsigned int ioaddr, int bits);
|
static int mdio_read(unsigned int ioaddr, int phy_id, int location);
|
static void mdio_write(unsigned int ioaddr, int phy_id, int location,
|
int value);
|
static unsigned short read_eeprom(unsigned int ioaddr, int index);
|
static void tc574_wait_for_completion(struct net_device *dev, int cmd);
|
|
static void tc574_reset(struct net_device *dev);
|
static void media_check(struct timer_list *t);
|
static int el3_open(struct net_device *dev);
|
static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
|
struct net_device *dev);
|
static irqreturn_t el3_interrupt(int irq, void *dev_id);
|
static void update_stats(struct net_device *dev);
|
static struct net_device_stats *el3_get_stats(struct net_device *dev);
|
static int el3_rx(struct net_device *dev, int worklimit);
|
static int el3_close(struct net_device *dev);
|
static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue);
|
static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
|
static void set_rx_mode(struct net_device *dev);
|
static void set_multicast_list(struct net_device *dev);
|
|
static void tc574_detach(struct pcmcia_device *p_dev);
|
|
/*
|
tc574_attach() creates an "instance" of the driver, allocating
|
local data structures for one device. The device is registered
|
with Card Services.
|
*/
|
static const struct net_device_ops el3_netdev_ops = {
|
.ndo_open = el3_open,
|
.ndo_stop = el3_close,
|
.ndo_start_xmit = el3_start_xmit,
|
.ndo_tx_timeout = el3_tx_timeout,
|
.ndo_get_stats = el3_get_stats,
|
.ndo_do_ioctl = el3_ioctl,
|
.ndo_set_rx_mode = set_multicast_list,
|
.ndo_set_mac_address = eth_mac_addr,
|
.ndo_validate_addr = eth_validate_addr,
|
};
|
|
static int tc574_probe(struct pcmcia_device *link)
|
{
|
struct el3_private *lp;
|
struct net_device *dev;
|
|
dev_dbg(&link->dev, "3c574_attach()\n");
|
|
/* Create the PC card device object. */
|
dev = alloc_etherdev(sizeof(struct el3_private));
|
if (!dev)
|
return -ENOMEM;
|
lp = netdev_priv(dev);
|
link->priv = dev;
|
lp->p_dev = link;
|
|
spin_lock_init(&lp->window_lock);
|
link->resource[0]->end = 32;
|
link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
|
link->config_flags |= CONF_ENABLE_IRQ;
|
link->config_index = 1;
|
|
dev->netdev_ops = &el3_netdev_ops;
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
return tc574_config(link);
|
}
|
|
static void tc574_detach(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
|
dev_dbg(&link->dev, "3c574_detach()\n");
|
|
unregister_netdev(dev);
|
|
tc574_release(link);
|
|
free_netdev(dev);
|
} /* tc574_detach */
|
|
static const char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
|
|
static int tc574_config(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
struct el3_private *lp = netdev_priv(dev);
|
int ret, i, j;
|
unsigned int ioaddr;
|
__be16 *phys_addr;
|
char *cardname;
|
__u32 config;
|
u8 *buf;
|
size_t len;
|
|
phys_addr = (__be16 *)dev->dev_addr;
|
|
dev_dbg(&link->dev, "3c574_config()\n");
|
|
link->io_lines = 16;
|
|
for (i = j = 0; j < 0x400; j += 0x20) {
|
link->resource[0]->start = j ^ 0x300;
|
i = pcmcia_request_io(link);
|
if (i == 0)
|
break;
|
}
|
if (i != 0)
|
goto failed;
|
|
ret = pcmcia_request_irq(link, el3_interrupt);
|
if (ret)
|
goto failed;
|
|
ret = pcmcia_enable_device(link);
|
if (ret)
|
goto failed;
|
|
dev->irq = link->irq;
|
dev->base_addr = link->resource[0]->start;
|
|
ioaddr = dev->base_addr;
|
|
/* The 3c574 normally uses an EEPROM for configuration info, including
|
the hardware address. The future products may include a modem chip
|
and put the address in the CIS. */
|
|
len = pcmcia_get_tuple(link, 0x88, &buf);
|
if (buf && len >= 6) {
|
for (i = 0; i < 3; i++)
|
phys_addr[i] = htons(le16_to_cpu(buf[i * 2]));
|
kfree(buf);
|
} else {
|
kfree(buf); /* 0 < len < 6 */
|
EL3WINDOW(0);
|
for (i = 0; i < 3; i++)
|
phys_addr[i] = htons(read_eeprom(ioaddr, i + 10));
|
if (phys_addr[0] == htons(0x6060)) {
|
pr_notice("IO port conflict at 0x%03lx-0x%03lx\n",
|
dev->base_addr, dev->base_addr+15);
|
goto failed;
|
}
|
}
|
if (link->prod_id[1])
|
cardname = link->prod_id[1];
|
else
|
cardname = "3Com 3c574";
|
|
{
|
u_char mcr;
|
outw(2<<11, ioaddr + RunnerRdCtrl);
|
mcr = inb(ioaddr + 2);
|
outw(0<<11, ioaddr + RunnerRdCtrl);
|
pr_info(" ASIC rev %d,", mcr>>3);
|
EL3WINDOW(3);
|
config = inl(ioaddr + Wn3_Config);
|
lp->default_media = (config & Xcvr) >> Xcvr_shift;
|
lp->autoselect = config & Autoselect ? 1 : 0;
|
}
|
|
timer_setup(&lp->media, media_check, 0);
|
|
{
|
int phy;
|
|
/* Roadrunner only: Turn on the MII transceiver */
|
outw(0x8040, ioaddr + Wn3_Options);
|
mdelay(1);
|
outw(0xc040, ioaddr + Wn3_Options);
|
tc574_wait_for_completion(dev, TxReset);
|
tc574_wait_for_completion(dev, RxReset);
|
mdelay(1);
|
outw(0x8040, ioaddr + Wn3_Options);
|
|
EL3WINDOW(4);
|
for (phy = 1; phy <= 32; phy++) {
|
int mii_status;
|
mdio_sync(ioaddr, 32);
|
mii_status = mdio_read(ioaddr, phy & 0x1f, 1);
|
if (mii_status != 0xffff) {
|
lp->phys = phy & 0x1f;
|
dev_dbg(&link->dev, " MII transceiver at "
|
"index %d, status %x.\n",
|
phy, mii_status);
|
if ((mii_status & 0x0040) == 0)
|
mii_preamble_required = 1;
|
break;
|
}
|
}
|
if (phy > 32) {
|
pr_notice(" No MII transceivers found!\n");
|
goto failed;
|
}
|
i = mdio_read(ioaddr, lp->phys, 16) | 0x40;
|
mdio_write(ioaddr, lp->phys, 16, i);
|
lp->advertising = mdio_read(ioaddr, lp->phys, 4);
|
if (full_duplex) {
|
/* Only advertise the FD media types. */
|
lp->advertising &= ~0x02a0;
|
mdio_write(ioaddr, lp->phys, 4, lp->advertising);
|
}
|
}
|
|
SET_NETDEV_DEV(dev, &link->dev);
|
|
if (register_netdev(dev) != 0) {
|
pr_notice("register_netdev() failed\n");
|
goto failed;
|
}
|
|
netdev_info(dev, "%s at io %#3lx, irq %d, hw_addr %pM\n",
|
cardname, dev->base_addr, dev->irq, dev->dev_addr);
|
netdev_info(dev, " %dK FIFO split %s Rx:Tx, %sMII interface.\n",
|
8 << (config & Ram_size),
|
ram_split[(config & Ram_split) >> Ram_split_shift],
|
config & Autoselect ? "autoselect " : "");
|
|
return 0;
|
|
failed:
|
tc574_release(link);
|
return -ENODEV;
|
|
} /* tc574_config */
|
|
static void tc574_release(struct pcmcia_device *link)
|
{
|
pcmcia_disable_device(link);
|
}
|
|
static int tc574_suspend(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
|
if (link->open)
|
netif_device_detach(dev);
|
|
return 0;
|
}
|
|
static int tc574_resume(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
|
if (link->open) {
|
tc574_reset(dev);
|
netif_device_attach(dev);
|
}
|
|
return 0;
|
}
|
|
static void dump_status(struct net_device *dev)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
EL3WINDOW(1);
|
netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x, tx free %04x\n",
|
inw(ioaddr+EL3_STATUS),
|
inw(ioaddr+RxStatus), inb(ioaddr+TxStatus),
|
inw(ioaddr+TxFree));
|
EL3WINDOW(4);
|
netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
|
inw(ioaddr+0x04), inw(ioaddr+0x06),
|
inw(ioaddr+0x08), inw(ioaddr+0x0a));
|
EL3WINDOW(1);
|
}
|
|
/*
|
Use this for commands that may take time to finish
|
*/
|
static void tc574_wait_for_completion(struct net_device *dev, int cmd)
|
{
|
int i = 1500;
|
outw(cmd, dev->base_addr + EL3_CMD);
|
while (--i > 0)
|
if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
|
if (i == 0)
|
netdev_notice(dev, "command 0x%04x did not complete!\n", cmd);
|
}
|
|
/* Read a word from the EEPROM using the regular EEPROM access register.
|
Assume that we are in register window zero.
|
*/
|
static unsigned short read_eeprom(unsigned int ioaddr, int index)
|
{
|
int timer;
|
outw(EEPROM_Read + index, ioaddr + Wn0EepromCmd);
|
/* Pause for at least 162 usec for the read to take place. */
|
for (timer = 1620; timer >= 0; timer--) {
|
if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0)
|
break;
|
}
|
return inw(ioaddr + Wn0EepromData);
|
}
|
|
/* MII transceiver control section.
|
Read and write the MII registers using software-generated serial
|
MDIO protocol. See the MII specifications or DP83840A data sheet
|
for details.
|
The maxium data clock rate is 2.5 Mhz. The timing is easily met by the
|
slow PC card interface. */
|
|
#define MDIO_SHIFT_CLK 0x01
|
#define MDIO_DIR_WRITE 0x04
|
#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE)
|
#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE)
|
#define MDIO_DATA_READ 0x02
|
#define MDIO_ENB_IN 0x00
|
|
/* Generate the preamble required for initial synchronization and
|
a few older transceivers. */
|
static void mdio_sync(unsigned int ioaddr, int bits)
|
{
|
unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
|
|
/* Establish sync by sending at least 32 logic ones. */
|
while (-- bits >= 0) {
|
outw(MDIO_DATA_WRITE1, mdio_addr);
|
outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
|
}
|
}
|
|
static int mdio_read(unsigned int ioaddr, int phy_id, int location)
|
{
|
int i;
|
int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
|
unsigned int retval = 0;
|
unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
|
|
if (mii_preamble_required)
|
mdio_sync(ioaddr, 32);
|
|
/* Shift the read command bits out. */
|
for (i = 14; i >= 0; i--) {
|
int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
|
outw(dataval, mdio_addr);
|
outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
|
}
|
/* Read the two transition, 16 data, and wire-idle bits. */
|
for (i = 19; i > 0; i--) {
|
outw(MDIO_ENB_IN, mdio_addr);
|
retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
|
outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
|
}
|
return (retval>>1) & 0xffff;
|
}
|
|
static void mdio_write(unsigned int ioaddr, int phy_id, int location, int value)
|
{
|
int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value;
|
unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
|
int i;
|
|
if (mii_preamble_required)
|
mdio_sync(ioaddr, 32);
|
|
/* Shift the command bits out. */
|
for (i = 31; i >= 0; i--) {
|
int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
|
outw(dataval, mdio_addr);
|
outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
|
}
|
/* Leave the interface idle. */
|
for (i = 1; i >= 0; i--) {
|
outw(MDIO_ENB_IN, mdio_addr);
|
outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
|
}
|
}
|
|
/* Reset and restore all of the 3c574 registers. */
|
static void tc574_reset(struct net_device *dev)
|
{
|
struct el3_private *lp = netdev_priv(dev);
|
int i;
|
unsigned int ioaddr = dev->base_addr;
|
unsigned long flags;
|
|
tc574_wait_for_completion(dev, TotalReset|0x10);
|
|
spin_lock_irqsave(&lp->window_lock, flags);
|
/* Clear any transactions in progress. */
|
outw(0, ioaddr + RunnerWrCtrl);
|
outw(0, ioaddr + RunnerRdCtrl);
|
|
/* Set the station address and mask. */
|
EL3WINDOW(2);
|
for (i = 0; i < 6; i++)
|
outb(dev->dev_addr[i], ioaddr + i);
|
for (; i < 12; i+=2)
|
outw(0, ioaddr + i);
|
|
/* Reset config options */
|
EL3WINDOW(3);
|
outb((dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl);
|
outl((lp->autoselect ? 0x01000000 : 0) | 0x0062001b,
|
ioaddr + Wn3_Config);
|
/* Roadrunner only: Turn on the MII transceiver. */
|
outw(0x8040, ioaddr + Wn3_Options);
|
mdelay(1);
|
outw(0xc040, ioaddr + Wn3_Options);
|
EL3WINDOW(1);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
|
tc574_wait_for_completion(dev, TxReset);
|
tc574_wait_for_completion(dev, RxReset);
|
mdelay(1);
|
spin_lock_irqsave(&lp->window_lock, flags);
|
EL3WINDOW(3);
|
outw(0x8040, ioaddr + Wn3_Options);
|
|
/* Switch to the stats window, and clear all stats by reading. */
|
outw(StatsDisable, ioaddr + EL3_CMD);
|
EL3WINDOW(6);
|
for (i = 0; i < 10; i++)
|
inb(ioaddr + i);
|
inw(ioaddr + 10);
|
inw(ioaddr + 12);
|
EL3WINDOW(4);
|
inb(ioaddr + 12);
|
inb(ioaddr + 13);
|
|
/* .. enable any extra statistics bits.. */
|
outw(0x0040, ioaddr + Wn4_NetDiag);
|
|
EL3WINDOW(1);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
|
/* .. re-sync MII and re-fill what NWay is advertising. */
|
mdio_sync(ioaddr, 32);
|
mdio_write(ioaddr, lp->phys, 4, lp->advertising);
|
if (!auto_polarity) {
|
/* works for TDK 78Q2120 series MII's */
|
i = mdio_read(ioaddr, lp->phys, 16) | 0x20;
|
mdio_write(ioaddr, lp->phys, 16, i);
|
}
|
|
spin_lock_irqsave(&lp->window_lock, flags);
|
/* Switch to register set 1 for normal use, just for TxFree. */
|
set_rx_mode(dev);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
|
outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
|
outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
|
/* Allow status bits to be seen. */
|
outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
|
/* Ack all pending events, and set active indicator mask. */
|
outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
|
ioaddr + EL3_CMD);
|
outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
|
| AdapterFailure | RxEarly, ioaddr + EL3_CMD);
|
}
|
|
static int el3_open(struct net_device *dev)
|
{
|
struct el3_private *lp = netdev_priv(dev);
|
struct pcmcia_device *link = lp->p_dev;
|
|
if (!pcmcia_dev_present(link))
|
return -ENODEV;
|
|
link->open++;
|
netif_start_queue(dev);
|
|
tc574_reset(dev);
|
lp->media.expires = jiffies + HZ;
|
add_timer(&lp->media);
|
|
dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
|
dev->name, inw(dev->base_addr + EL3_STATUS));
|
|
return 0;
|
}
|
|
static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
|
netdev_notice(dev, "Transmit timed out!\n");
|
dump_status(dev);
|
dev->stats.tx_errors++;
|
netif_trans_update(dev); /* prevent tx timeout */
|
/* Issue TX_RESET and TX_START commands. */
|
tc574_wait_for_completion(dev, TxReset);
|
outw(TxEnable, ioaddr + EL3_CMD);
|
netif_wake_queue(dev);
|
}
|
|
static void pop_tx_status(struct net_device *dev)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
int i;
|
|
/* Clear the Tx status stack. */
|
for (i = 32; i > 0; i--) {
|
u_char tx_status = inb(ioaddr + TxStatus);
|
if (!(tx_status & 0x84))
|
break;
|
/* reset transmitter on jabber error or underrun */
|
if (tx_status & 0x30)
|
tc574_wait_for_completion(dev, TxReset);
|
if (tx_status & 0x38) {
|
pr_debug("%s: transmit error: status 0x%02x\n",
|
dev->name, tx_status);
|
outw(TxEnable, ioaddr + EL3_CMD);
|
dev->stats.tx_aborted_errors++;
|
}
|
outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
|
}
|
}
|
|
static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
|
struct net_device *dev)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
struct el3_private *lp = netdev_priv(dev);
|
unsigned long flags;
|
|
pr_debug("%s: el3_start_xmit(length = %ld) called, "
|
"status %4.4x.\n", dev->name, (long)skb->len,
|
inw(ioaddr + EL3_STATUS));
|
|
spin_lock_irqsave(&lp->window_lock, flags);
|
|
dev->stats.tx_bytes += skb->len;
|
|
/* Put out the doubleword header... */
|
outw(skb->len, ioaddr + TX_FIFO);
|
outw(0, ioaddr + TX_FIFO);
|
/* ... and the packet rounded to a doubleword. */
|
outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2);
|
|
/* TxFree appears only in Window 1, not offset 0x1c. */
|
if (inw(ioaddr + TxFree) <= 1536) {
|
netif_stop_queue(dev);
|
/* Interrupt us when the FIFO has room for max-sized packet.
|
The threshold is in units of dwords. */
|
outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD);
|
}
|
|
pop_tx_status(dev);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
dev_kfree_skb(skb);
|
return NETDEV_TX_OK;
|
}
|
|
/* The EL3 interrupt handler. */
|
static irqreturn_t el3_interrupt(int irq, void *dev_id)
|
{
|
struct net_device *dev = (struct net_device *) dev_id;
|
struct el3_private *lp = netdev_priv(dev);
|
unsigned int ioaddr;
|
unsigned status;
|
int work_budget = max_interrupt_work;
|
int handled = 0;
|
|
if (!netif_device_present(dev))
|
return IRQ_NONE;
|
ioaddr = dev->base_addr;
|
|
pr_debug("%s: interrupt, status %4.4x.\n",
|
dev->name, inw(ioaddr + EL3_STATUS));
|
|
spin_lock(&lp->window_lock);
|
|
while ((status = inw(ioaddr + EL3_STATUS)) &
|
(IntLatch | RxComplete | RxEarly | StatsFull)) {
|
if (!netif_device_present(dev) ||
|
((status & 0xe000) != 0x2000)) {
|
pr_debug("%s: Interrupt from dead card\n", dev->name);
|
break;
|
}
|
|
handled = 1;
|
|
if (status & RxComplete)
|
work_budget = el3_rx(dev, work_budget);
|
|
if (status & TxAvailable) {
|
pr_debug(" TX room bit was handled.\n");
|
/* There's room in the FIFO for a full-sized packet. */
|
outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
|
netif_wake_queue(dev);
|
}
|
|
if (status & TxComplete)
|
pop_tx_status(dev);
|
|
if (status & (AdapterFailure | RxEarly | StatsFull)) {
|
/* Handle all uncommon interrupts. */
|
if (status & StatsFull)
|
update_stats(dev);
|
if (status & RxEarly) {
|
work_budget = el3_rx(dev, work_budget);
|
outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
|
}
|
if (status & AdapterFailure) {
|
u16 fifo_diag;
|
EL3WINDOW(4);
|
fifo_diag = inw(ioaddr + Wn4_FIFODiag);
|
EL3WINDOW(1);
|
netdev_notice(dev, "adapter failure, FIFO diagnostic register %04x\n",
|
fifo_diag);
|
if (fifo_diag & 0x0400) {
|
/* Tx overrun */
|
tc574_wait_for_completion(dev, TxReset);
|
outw(TxEnable, ioaddr + EL3_CMD);
|
}
|
if (fifo_diag & 0x2000) {
|
/* Rx underrun */
|
tc574_wait_for_completion(dev, RxReset);
|
set_rx_mode(dev);
|
outw(RxEnable, ioaddr + EL3_CMD);
|
}
|
outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
|
}
|
}
|
|
if (--work_budget < 0) {
|
pr_debug("%s: Too much work in interrupt, "
|
"status %4.4x.\n", dev->name, status);
|
/* Clear all interrupts */
|
outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
|
break;
|
}
|
/* Acknowledge the IRQ. */
|
outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
|
}
|
|
pr_debug("%s: exiting interrupt, status %4.4x.\n",
|
dev->name, inw(ioaddr + EL3_STATUS));
|
|
spin_unlock(&lp->window_lock);
|
return IRQ_RETVAL(handled);
|
}
|
|
/*
|
This timer serves two purposes: to check for missed interrupts
|
(and as a last resort, poll the NIC for events), and to monitor
|
the MII, reporting changes in cable status.
|
*/
|
static void media_check(struct timer_list *t)
|
{
|
struct el3_private *lp = from_timer(lp, t, media);
|
struct net_device *dev = lp->p_dev->priv;
|
unsigned int ioaddr = dev->base_addr;
|
unsigned long flags;
|
unsigned short /* cable, */ media, partner;
|
|
if (!netif_device_present(dev))
|
goto reschedule;
|
|
/* Check for pending interrupt with expired latency timer: with
|
this, we can limp along even if the interrupt is blocked */
|
if ((inw(ioaddr + EL3_STATUS) & IntLatch) && (inb(ioaddr + Timer) == 0xff)) {
|
if (!lp->fast_poll)
|
netdev_info(dev, "interrupt(s) dropped!\n");
|
|
local_irq_save(flags);
|
el3_interrupt(dev->irq, dev);
|
local_irq_restore(flags);
|
|
lp->fast_poll = HZ;
|
}
|
if (lp->fast_poll) {
|
lp->fast_poll--;
|
lp->media.expires = jiffies + 2*HZ/100;
|
add_timer(&lp->media);
|
return;
|
}
|
|
spin_lock_irqsave(&lp->window_lock, flags);
|
EL3WINDOW(4);
|
media = mdio_read(ioaddr, lp->phys, 1);
|
partner = mdio_read(ioaddr, lp->phys, 5);
|
EL3WINDOW(1);
|
|
if (media != lp->media_status) {
|
if ((media ^ lp->media_status) & 0x0004)
|
netdev_info(dev, "%s link beat\n",
|
(lp->media_status & 0x0004) ? "lost" : "found");
|
if ((media ^ lp->media_status) & 0x0020) {
|
lp->partner = 0;
|
if (lp->media_status & 0x0020) {
|
netdev_info(dev, "autonegotiation restarted\n");
|
} else if (partner) {
|
partner &= lp->advertising;
|
lp->partner = partner;
|
netdev_info(dev, "autonegotiation complete: "
|
"%dbaseT-%cD selected\n",
|
(partner & 0x0180) ? 100 : 10,
|
(partner & 0x0140) ? 'F' : 'H');
|
} else {
|
netdev_info(dev, "link partner did not autonegotiate\n");
|
}
|
|
EL3WINDOW(3);
|
outb((partner & 0x0140 ? 0x20 : 0) |
|
(dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl);
|
EL3WINDOW(1);
|
|
}
|
if (media & 0x0010)
|
netdev_info(dev, "remote fault detected\n");
|
if (media & 0x0002)
|
netdev_info(dev, "jabber detected\n");
|
lp->media_status = media;
|
}
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
|
reschedule:
|
lp->media.expires = jiffies + HZ;
|
add_timer(&lp->media);
|
}
|
|
static struct net_device_stats *el3_get_stats(struct net_device *dev)
|
{
|
struct el3_private *lp = netdev_priv(dev);
|
|
if (netif_device_present(dev)) {
|
unsigned long flags;
|
spin_lock_irqsave(&lp->window_lock, flags);
|
update_stats(dev);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
}
|
return &dev->stats;
|
}
|
|
/* Update statistics.
|
Surprisingly this need not be run single-threaded, but it effectively is.
|
The counters clear when read, so the adds must merely be atomic.
|
*/
|
static void update_stats(struct net_device *dev)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
u8 up;
|
|
pr_debug("%s: updating the statistics.\n", dev->name);
|
|
if (inw(ioaddr+EL3_STATUS) == 0xffff) /* No card. */
|
return;
|
|
/* Unlike the 3c509 we need not turn off stats updates while reading. */
|
/* Switch to the stats window, and read everything. */
|
EL3WINDOW(6);
|
dev->stats.tx_carrier_errors += inb(ioaddr + 0);
|
dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
|
/* Multiple collisions. */ inb(ioaddr + 2);
|
dev->stats.collisions += inb(ioaddr + 3);
|
dev->stats.tx_window_errors += inb(ioaddr + 4);
|
dev->stats.rx_fifo_errors += inb(ioaddr + 5);
|
dev->stats.tx_packets += inb(ioaddr + 6);
|
up = inb(ioaddr + 9);
|
dev->stats.tx_packets += (up&0x30) << 4;
|
/* Rx packets */ inb(ioaddr + 7);
|
/* Tx deferrals */ inb(ioaddr + 8);
|
/* rx */ inw(ioaddr + 10);
|
/* tx */ inw(ioaddr + 12);
|
|
EL3WINDOW(4);
|
/* BadSSD */ inb(ioaddr + 12);
|
up = inb(ioaddr + 13);
|
|
EL3WINDOW(1);
|
}
|
|
static int el3_rx(struct net_device *dev, int worklimit)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
short rx_status;
|
|
pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
|
dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus));
|
while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) &&
|
worklimit > 0) {
|
worklimit--;
|
if (rx_status & 0x4000) { /* Error, update stats. */
|
short error = rx_status & 0x3800;
|
dev->stats.rx_errors++;
|
switch (error) {
|
case 0x0000: dev->stats.rx_over_errors++; break;
|
case 0x0800: dev->stats.rx_length_errors++; break;
|
case 0x1000: dev->stats.rx_frame_errors++; break;
|
case 0x1800: dev->stats.rx_length_errors++; break;
|
case 0x2000: dev->stats.rx_frame_errors++; break;
|
case 0x2800: dev->stats.rx_crc_errors++; break;
|
}
|
} else {
|
short pkt_len = rx_status & 0x7ff;
|
struct sk_buff *skb;
|
|
skb = netdev_alloc_skb(dev, pkt_len + 5);
|
|
pr_debug(" Receiving packet size %d status %4.4x.\n",
|
pkt_len, rx_status);
|
if (skb != NULL) {
|
skb_reserve(skb, 2);
|
insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
|
((pkt_len+3)>>2));
|
skb->protocol = eth_type_trans(skb, dev);
|
netif_rx(skb);
|
dev->stats.rx_packets++;
|
dev->stats.rx_bytes += pkt_len;
|
} else {
|
pr_debug("%s: couldn't allocate a sk_buff of"
|
" size %d.\n", dev->name, pkt_len);
|
dev->stats.rx_dropped++;
|
}
|
}
|
tc574_wait_for_completion(dev, RxDiscard);
|
}
|
|
return worklimit;
|
}
|
|
/* Provide ioctl() calls to examine the MII xcvr state. */
|
static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
|
{
|
struct el3_private *lp = netdev_priv(dev);
|
unsigned int ioaddr = dev->base_addr;
|
struct mii_ioctl_data *data = if_mii(rq);
|
int phy = lp->phys & 0x1f;
|
|
pr_debug("%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n",
|
dev->name, rq->ifr_ifrn.ifrn_name, cmd,
|
data->phy_id, data->reg_num, data->val_in, data->val_out);
|
|
switch(cmd) {
|
case SIOCGMIIPHY: /* Get the address of the PHY in use. */
|
data->phy_id = phy;
|
fallthrough;
|
case SIOCGMIIREG: /* Read the specified MII register. */
|
{
|
int saved_window;
|
unsigned long flags;
|
|
spin_lock_irqsave(&lp->window_lock, flags);
|
saved_window = inw(ioaddr + EL3_CMD) >> 13;
|
EL3WINDOW(4);
|
data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f,
|
data->reg_num & 0x1f);
|
EL3WINDOW(saved_window);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
return 0;
|
}
|
case SIOCSMIIREG: /* Write the specified MII register */
|
{
|
int saved_window;
|
unsigned long flags;
|
|
spin_lock_irqsave(&lp->window_lock, flags);
|
saved_window = inw(ioaddr + EL3_CMD) >> 13;
|
EL3WINDOW(4);
|
mdio_write(ioaddr, data->phy_id & 0x1f,
|
data->reg_num & 0x1f, data->val_in);
|
EL3WINDOW(saved_window);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
return 0;
|
}
|
default:
|
return -EOPNOTSUPP;
|
}
|
}
|
|
/* The Odie chip has a 64 bin multicast filter, but the bit layout is not
|
documented. Until it is we revert to receiving all multicast frames when
|
any multicast reception is desired.
|
Note: My other drivers emit a log message whenever promiscuous mode is
|
entered to help detect password sniffers. This is less desirable on
|
typical PC card machines, so we omit the message.
|
*/
|
|
static void set_rx_mode(struct net_device *dev)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
|
if (dev->flags & IFF_PROMISC)
|
outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
|
ioaddr + EL3_CMD);
|
else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
|
outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD);
|
else
|
outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
|
}
|
|
static void set_multicast_list(struct net_device *dev)
|
{
|
struct el3_private *lp = netdev_priv(dev);
|
unsigned long flags;
|
|
spin_lock_irqsave(&lp->window_lock, flags);
|
set_rx_mode(dev);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
}
|
|
static int el3_close(struct net_device *dev)
|
{
|
unsigned int ioaddr = dev->base_addr;
|
struct el3_private *lp = netdev_priv(dev);
|
struct pcmcia_device *link = lp->p_dev;
|
|
dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
|
|
if (pcmcia_dev_present(link)) {
|
unsigned long flags;
|
|
/* Turn off statistics ASAP. We update lp->stats below. */
|
outw(StatsDisable, ioaddr + EL3_CMD);
|
|
/* Disable the receiver and transmitter. */
|
outw(RxDisable, ioaddr + EL3_CMD);
|
outw(TxDisable, ioaddr + EL3_CMD);
|
|
/* Note: Switching to window 0 may disable the IRQ. */
|
EL3WINDOW(0);
|
spin_lock_irqsave(&lp->window_lock, flags);
|
update_stats(dev);
|
spin_unlock_irqrestore(&lp->window_lock, flags);
|
|
/* force interrupts off */
|
outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
|
}
|
|
link->open--;
|
netif_stop_queue(dev);
|
del_timer_sync(&lp->media);
|
|
return 0;
|
}
|
|
static const struct pcmcia_device_id tc574_ids[] = {
|
PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574),
|
PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "cis/3CCFEM556.cis"),
|
PCMCIA_DEVICE_NULL,
|
};
|
MODULE_DEVICE_TABLE(pcmcia, tc574_ids);
|
|
static struct pcmcia_driver tc574_driver = {
|
.owner = THIS_MODULE,
|
.name = "3c574_cs",
|
.probe = tc574_probe,
|
.remove = tc574_detach,
|
.id_table = tc574_ids,
|
.suspend = tc574_suspend,
|
.resume = tc574_resume,
|
};
|
module_pcmcia_driver(tc574_driver);
|
