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mirror-linux/drivers/net/ethernet/3com/3c509.c

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// SPDX-License-Identifier: GPL-2.0
/* 3c509.c: A 3c509 EtherLink3 ethernet driver for linux. */
/*
* Written 1993-2000 by Donald Becker.
*
* Copyright 1994-2000 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 General Public License,
* incorporated herein by reference.
*
* This driver is for the 3Com EtherLinkIII series.
*
* The author may be reached as becker@scyld.com, or C/O
* Scyld Computing Corporation
* 410 Severn Ave., Suite 210
* Annapolis MD 21403
*
* Known limitations:
* Because of the way 3c509 ISA detection works it's difficult to predict
* a priori which of several ISA-mode cards will be detected first.
*
* This driver does not use predictive interrupt mode, resulting in higher
* packet latency but lower overhead. If interrupts are disabled for an
* unusually long time it could also result in missed packets, but in
* practice this rarely happens.
*
*
* FIXES:
* Alan Cox: Removed the 'Unexpected interrupt' bug.
* Michael Meskes: Upgraded to Donald Becker's version 1.07.
* Alan Cox: Increased the eeprom delay. Regardless of
* what the docs say some people definitely
* get problems with lower (but in card spec)
* delays.
* v1.10 4/21/97 Fixed module code so that multiple cards may be
* detected, other cleanups. -djb
* Andrea Arcangeli: Upgraded to Donald Becker's version 1.12.
* Rick Payne: Fixed SMP race condition.
* v1.13 9/8/97 Made 'max_interrupt_work' an insmod-settable
* variable. -djb
* v1.14 10/15/97 Avoided waiting..discard message for fast
* machines. -djb
* v1.15 1/31/98 Faster recovery for Tx errors. -djb
* v1.16 2/3/98 Different ID port handling to avoid sound
* cards. -djb
* v1.18 12Mar2001 Andrew Morton
* - Avoid bogus detect of 3c590's (Andrzej Krzysztofowicz)
* - Reviewed against 1.18 from scyld.com
* v1.18a 17Nov2001 Jeff Garzik <jgarzik@pobox.com>
* - ethtool support.
* v1.18b 1Mar2002 Zwane Mwaikambo <zwane@commfireservices.com>
* - Power Management support.
* v1.18c 1Mar2002 David Ruggiero <jdr@farfalle.com>
* - Full duplex support.
* v1.19 16Oct2002 Zwane Mwaikambo <zwane@linuxpower.ca>
* - Additional ethtool features.
* v1.19a 28Oct2002 David Ruggiero <jdr@farfalle.com>
* - Increase *read_eeprom udelay to workaround oops with
* 2 cards.
* v1.19b 08Nov2002 Marc Zyngier <maz@wild-wind.fr.eu.org>
* - Introduce driver model for EISA cards.
* v1.20 04Feb2008 Ondrej Zary <linux@rainbow-software.org>
* - convert to isa_driver and pnp_driver and some
* cleanups.
*/
#define DRV_NAME "3c509"
/* A few values that may be tweaked. */
/* Time in jiffies before concluding the transmitter is hung. */
#define TX_TIMEOUT (400 * HZ / 1000)
#include <linux/bitops.h>
#include <linux/delay.h> /* for udelay() */
#include <linux/device.h>
#include <linux/eisa.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/in.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/isa.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/pm.h>
#include <linux/pnp.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <asm/irq.h>
#ifdef EL3_DEBUG
static int el3_debug = EL3_DEBUG;
#else
static int el3_debug = 2;
#endif
/* Used to do a global count of all the cards in the system. Must be
* a global variable so that the eisa probe routines can increment it.
*/
static int el3_cards;
#define EL3_MAX_CARDS 8
/* To minimize the size of the driver source I only define operating
* constants if they are used several times. You'll need the manual
* anyway if you want to understand driver details.
*/
/* Offsets from base I/O address. */
#define EL3_DATA 0x00
#define EL3_CMD 0x0e
#define EL3_STATUS 0x0e
#define EEPROM_READ 0x80
#define EL3_IO_EXTENT 16
#define EL3WINDOW(win_num) outw(SELECT_WINDOW + (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 c509cmd {
TOTAL_RESET = 0 << 11,
SELECT_WINDOW = 1 << 11,
START_COAX = 2 << 11,
RX_DISABLE = 3 << 11,
RX_ENABLE = 4 << 11,
RX_RESET = 5 << 11,
RX_DISCARD = 8 << 11,
TX_ENABLE = 9 << 11,
TX_DISABLE = 10 << 11,
TX_RESET = 11 << 11,
FAKE_INTR = 12 << 11,
ACK_INTR = 13 << 11,
SET_INTR_ENB = 14 << 11,
SET_STATUS_ENB = 15 << 11,
SET_RX_FILTER = 16 << 11,
SET_RX_THRESHOLD = 17 << 11,
SET_TX_THRESHOLD = 18 << 11,
SET_TX_START = 19 << 11,
STATS_ENABLE = 21 << 11,
STATS_DISABLE = 22 << 11,
STOP_COAX = 23 << 11,
POWER_UP = 27 << 11,
POWER_DOWN = 28 << 11,
POWER_AUTO = 29 << 11,
};
enum c509status {
INT_LATCH = 0x0001,
ADAPTER_FAILURE = 0x0002,
TX_COMPLETE = 0x0004,
TX_AVAILABLE = 0x0008,
RX_COMPLETE = 0x0010,
RX_EARLY = 0x0020,
INT_REQ = 0x0040,
STATS_FULL = 0x0080,
CMD_BUSY = 0x1000,
};
/* The SET_RX_FILTER command accepts the following classes: */
enum rx_filter {
RX_STATION = 1,
RX_MULTICAST = 2,
RX_BROADCAST = 4,
RX_PROM = 8,
};
/* Register window 1 offsets, the window used in normal operation. */
#define TX_FIFO 0x00
#define RX_FIFO 0x00
#define RX_STATUS 0x08
#define TX_STATUS 0x0B
#define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
#define WN0_CONF_CTRL 0x04 /* Window 0: Configuration control register. */
#define WN0_ADDR_CONF 0x06 /* Window 0: Address configuration register. */
#define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
#define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
#define WN4_NETDIAG 0x06 /* Window 4: Net diagnostic. */
#define FD_ENABLE 0x8000 /* Enable full-duplex ("external loopback"). */
/*
* Must be a power of two (we use a binary and in the
* circular queue).
*/
#define SKB_QUEUE_SIZE 64
enum el3_cardtype { EL3_ISA, EL3_PNP, EL3_EISA };
struct el3_private {
/* for device access */
spinlock_t lock;
/* skb send-queue */
int head, size;
struct sk_buff *queue[SKB_QUEUE_SIZE];
enum el3_cardtype type;
};
static int id_port;
static int current_tag;
static struct net_device *el3_devs[EL3_MAX_CARDS];
/* Parameters that may be passed into the module. */
static int debug = -1;
static int irq[] = {-1, -1, -1, -1, -1, -1, -1, -1};
/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
static int max_interrupt_work = 10;
#ifdef CONFIG_PNP
static int nopnp;
#endif
static int el3_common_init(struct net_device *dev);
static void el3_common_remove(struct net_device *dev);
static ushort id_read_eeprom(int index);
static ushort read_eeprom(int ioaddr, int index);
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);
static int el3_close(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue);
static void el3_down(struct net_device *dev);
static void el3_up(struct net_device *dev);
static const struct ethtool_ops ethtool_ops;
#ifdef CONFIG_PM
static int el3_suspend(struct device *, pm_message_t);
static int el3_resume(struct device *);
#else
#define el3_suspend NULL
#define el3_resume NULL
#endif
/* Generic device remove for all device types. */
static int el3_device_remove(struct device *device);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void el3_poll_controller(struct net_device *dev);
#endif
/* Return 0 on success, 1 on error, 2 when found already detected PnP card. */
static int el3_isa_id_sequence(__be16 *phys_addr)
{
short lrs_state = 0xff;
int i;
/* ISA boards are detected by sending the ID sequence to the
* ID_PORT. We find cards past the first by setting the 'current_tag'
* on cards as they are found. Cards with their tag set will not
* respond to subsequent ID sequences.
*/
outb(0x00, id_port);
outb(0x00, id_port);
for (i = 0; i < 255; i++) {
outb(lrs_state, id_port);
lrs_state <<= 1;
lrs_state = lrs_state & 0x100 ? lrs_state ^ 0xcf : lrs_state;
}
/* For the first probe, clear all board's tag registers. */
if (current_tag == 0)
outb(0xd0, id_port);
else /* Otherwise kill off already-found boards. */
outb(0xd8, id_port);
if (id_read_eeprom(7) != 0x6d50)
return 1;
/* Read in EEPROM data, which does contention-select.
* Only the lowest address board will stay "on-line".
* 3Com got the byte order backwards.
*/
for (i = 0; i < 3; i++)
phys_addr[i] = htons(id_read_eeprom(i));
#ifdef CONFIG_PNP
if (!nopnp) {
/* The ISA PnP 3c509 cards respond to the ID sequence too.
* This check is needed in order not to register them twice.
*/
for (i = 0; i < el3_cards; i++) {
struct el3_private *lp = netdev_priv(el3_devs[i]);
if (lp->type == EL3_PNP &&
ether_addr_equal((u8 *)phys_addr,
el3_devs[i]->dev_addr)) {
if (el3_debug > 3)
pr_debug("3c509 with address %02x %02x %02x %02x %02x %02x was found by ISAPnP\n",
phys_addr[0] & 0xff,
phys_addr[0] >> 8,
phys_addr[1] & 0xff,
phys_addr[1] >> 8,
phys_addr[2] & 0xff,
phys_addr[2] >> 8);
/* Set the adaptor tag so that the next card
* can be found.
*/
outb(0xd0 + ++current_tag, id_port);
return 2;
}
}
}
#endif /* CONFIG_PNP */
return 0;
}
static void el3_dev_fill(struct net_device *dev, __be16 *phys_addr, int ioaddr,
int irq, int if_port, enum el3_cardtype type)
{
struct el3_private *lp = netdev_priv(dev);
eth_hw_addr_set(dev, (u8 *)phys_addr);
dev->base_addr = ioaddr;
dev->irq = irq;
dev->if_port = if_port;
lp->type = type;
}
static int el3_isa_match(struct device *pdev, unsigned int ndev)
{
int ioaddr, isa_irq, if_port, err;
struct net_device *dev;
unsigned int iobase;
__be16 phys_addr[3];
while ((err = el3_isa_id_sequence(phys_addr)) == 2)
; /* Skip to next card when PnP card found */
if (err == 1)
return 0;
iobase = id_read_eeprom(8);
if_port = iobase >> 14;
ioaddr = 0x200 + ((iobase & 0x1f) << 4);
if (irq[el3_cards] > 1 && irq[el3_cards] < 16)
isa_irq = irq[el3_cards];
else
isa_irq = id_read_eeprom(9) >> 12;
dev = alloc_etherdev(sizeof(struct el3_private));
if (!dev)
return -ENOMEM;
SET_NETDEV_DEV(dev, pdev);
if (!request_region(ioaddr, EL3_IO_EXTENT, "3c509-isa")) {
free_netdev(dev);
return 0;
}
/* Set the adaptor tag so that the next card can be found. */
outb(0xd0 + ++current_tag, id_port);
/* Activate the adaptor at the EEPROM location. */
outb((ioaddr >> 4) | 0xe0, id_port);
EL3WINDOW(0);
if (inw(ioaddr) != 0x6d50) {
free_netdev(dev);
return 0;
}
/* Free the interrupt so that some other card can use it. */
outw(0x0f00, ioaddr + WN0_IRQ);
el3_dev_fill(dev, phys_addr, ioaddr, isa_irq, if_port, EL3_ISA);
dev_set_drvdata(pdev, dev);
if (el3_common_init(dev)) {
free_netdev(dev);
return 0;
}
el3_devs[el3_cards++] = dev;
return 1;
}
static void el3_isa_remove(struct device *pdev, unsigned int ndev)
{
el3_device_remove(pdev);
dev_set_drvdata(pdev, NULL);
}
#ifdef CONFIG_PM
static int el3_isa_suspend(struct device *dev, unsigned int n,
pm_message_t state)
{
current_tag = 0;
return el3_suspend(dev, state);
}
static int el3_isa_resume(struct device *dev, unsigned int n)
{
struct net_device *ndev = dev_get_drvdata(dev);
int ioaddr = ndev->base_addr, err;
__be16 phys_addr[3];
while ((err = el3_isa_id_sequence(phys_addr)) == 2)
; /* Skip to next card when PnP card found */
if (err == 1)
return 0;
/* Set the adaptor tag so that the next card can be found. */
outb(0xd0 + ++current_tag, id_port);
/* Enable the card */
outb((ioaddr >> 4) | 0xe0, id_port);
EL3WINDOW(0);
if (inw(ioaddr) != 0x6d50)
return 1;
/* Free the interrupt so that some other card can use it. */
outw(0x0f00, ioaddr + WN0_IRQ);
return el3_resume(dev);
}
#endif
static struct isa_driver el3_isa_driver = {
.match = el3_isa_match,
.remove = el3_isa_remove,
#ifdef CONFIG_PM
.suspend = el3_isa_suspend,
.resume = el3_isa_resume,
#endif
.driver = {
.name = "3c509"
},
};
static int isa_registered;
#ifdef CONFIG_PNP
static const struct pnp_device_id el3_pnp_ids[] = {
{ .id = "TCM5090" }, /* 3Com Etherlink III (TP) */
{ .id = "TCM5091" }, /* 3Com Etherlink III */
{ .id = "TCM5094" }, /* 3Com Etherlink III (combo) */
{ .id = "TCM5095" }, /* 3Com Etherlink III (TPO) */
{ .id = "TCM5098" }, /* 3Com Etherlink III (TPC) */
{ .id = "PNP80f7" }, /* 3Com Etherlink III compatible */
{ .id = "PNP80f8" }, /* 3Com Etherlink III compatible */
{ .id = "" }
};
MODULE_DEVICE_TABLE(pnp, el3_pnp_ids);
static int el3_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id)
{
struct net_device *dev = NULL;
int ioaddr, irq, if_port;
__be16 phys_addr[3];
short i;
int err;
ioaddr = pnp_port_start(pdev, 0);
if (!request_region(ioaddr, EL3_IO_EXTENT, "3c509-pnp"))
return -EBUSY;
irq = pnp_irq(pdev, 0);
EL3WINDOW(0);
for (i = 0; i < 3; i++)
phys_addr[i] = htons(read_eeprom(ioaddr, i));
if_port = read_eeprom(ioaddr, 8) >> 14;
dev = alloc_etherdev(sizeof(struct el3_private));
if (!dev) {
release_region(ioaddr, EL3_IO_EXTENT);
return -ENOMEM;
}
SET_NETDEV_DEV(dev, &pdev->dev);
el3_dev_fill(dev, phys_addr, ioaddr, irq, if_port, EL3_PNP);
pnp_set_drvdata(pdev, dev);
err = el3_common_init(dev);
if (err) {
pnp_set_drvdata(pdev, NULL);
free_netdev(dev);
return err;
}
el3_devs[el3_cards++] = dev;
return 0;
}
static void el3_pnp_remove(struct pnp_dev *pdev)
{
el3_common_remove(pnp_get_drvdata(pdev));
pnp_set_drvdata(pdev, NULL);
}
#ifdef CONFIG_PM
static int el3_pnp_suspend(struct pnp_dev *pdev, pm_message_t state)
{
return el3_suspend(&pdev->dev, state);
}
static int el3_pnp_resume(struct pnp_dev *pdev)
{
return el3_resume(&pdev->dev);
}
#endif
static struct pnp_driver el3_pnp_driver = {
.name = "3c509",
.id_table = el3_pnp_ids,
.probe = el3_pnp_probe,
.remove = el3_pnp_remove,
#ifdef CONFIG_PM
.suspend = el3_pnp_suspend,
.resume = el3_pnp_resume,
#endif
};
static int pnp_registered;
#endif /* CONFIG_PNP */
#ifdef CONFIG_EISA
static const struct eisa_device_id el3_eisa_ids[] = {
{ "TCM5090" },
{ "TCM5091" },
{ "TCM5092" },
{ "TCM5093" },
{ "TCM5094" },
{ "TCM5095" },
{ "TCM5098" },
{ "" }
};
MODULE_DEVICE_TABLE(eisa, el3_eisa_ids);
static int el3_eisa_probe(struct device *device);
static struct eisa_driver el3_eisa_driver = {
.id_table = el3_eisa_ids,
.driver = {
.name = "3c579",
.probe = el3_eisa_probe,
.remove = el3_device_remove,
.suspend = el3_suspend,
.resume = el3_resume,
}
};
static int eisa_registered;
#endif
static const struct net_device_ops netdev_ops = {
.ndo_open = el3_open,
.ndo_stop = el3_close,
.ndo_start_xmit = el3_start_xmit,
.ndo_get_stats = el3_get_stats,
.ndo_set_rx_mode = set_multicast_list,
.ndo_tx_timeout = el3_tx_timeout,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = el3_poll_controller,
#endif
};
static int el3_common_init(struct net_device *dev)
{
static const char *const if_names[] = {
"10baseT", "AUI", "undefined", "BNC"
};
struct el3_private *lp = netdev_priv(dev);
int err;
spin_lock_init(&lp->lock);
if (dev->mem_start & 0x05) { /* xcvr codes 1/3/4/12 */
dev->if_port = (dev->mem_start & 0x0f);
} else { /* xcvr codes 0/8 */
/* use eeprom value, but save user's full-duplex selection */
dev->if_port |= (dev->mem_start & 0x08);
}
/* The EL3-specific entries in the device structure. */
dev->netdev_ops = &netdev_ops;
dev->watchdog_timeo = TX_TIMEOUT;
dev->ethtool_ops = &ethtool_ops;
err = register_netdev(dev);
if (err) {
pr_err("Failed to register 3c5x9 at %#3.3lx, IRQ %d.\n",
dev->base_addr, dev->irq);
release_region(dev->base_addr, EL3_IO_EXTENT);
return err;
}
pr_info("%s: 3c5x9 found at %#3.3lx, %s port, address %pM, IRQ %d.\n",
dev->name, dev->base_addr, if_names[(dev->if_port & 0x03)],
dev->dev_addr, dev->irq);
return 0;
}
static void el3_common_remove(struct net_device *dev)
{
unregister_netdev(dev);
release_region(dev->base_addr, EL3_IO_EXTENT);
free_netdev(dev);
}
#ifdef CONFIG_EISA
static int el3_eisa_probe(struct device *device)
{
struct net_device *dev = NULL;
struct eisa_device *edev;
int ioaddr, irq, if_port;
__be16 phys_addr[3];
short i;
int err;
/* Yeepee, The driver framework is calling us ! */
edev = to_eisa_device(device);
ioaddr = edev->base_addr;
if (!request_region(ioaddr, EL3_IO_EXTENT, "3c579-eisa"))
return -EBUSY;
/* Change the register set to the configuration window 0. */
outw(SELECT_WINDOW | 0, ioaddr + 0xC80 + EL3_CMD);
irq = inw(ioaddr + WN0_IRQ) >> 12;
if_port = inw(ioaddr + 6) >> 14;
for (i = 0; i < 3; i++)
phys_addr[i] = htons(read_eeprom(ioaddr, i));
/* Restore the "Product ID" to the EEPROM read register. */
read_eeprom(ioaddr, 3);
dev = alloc_etherdev(sizeof(struct el3_private));
if (!dev) {
release_region(ioaddr, EL3_IO_EXTENT);
return -ENOMEM;
}
SET_NETDEV_DEV(dev, device);
el3_dev_fill(dev, phys_addr, ioaddr, irq, if_port, EL3_EISA);
eisa_set_drvdata(edev, dev);
err = el3_common_init(dev);
if (err) {
eisa_set_drvdata(edev, NULL);
free_netdev(dev);
return err;
}
el3_devs[el3_cards++] = dev;
return 0;
}
#endif
/* This remove works for all device types.
*
* The net dev must be stored in the driver data field.
*/
static int el3_device_remove(struct device *device)
{
struct net_device *dev;
dev = dev_get_drvdata(device);
el3_common_remove(dev);
return 0;
}
/* Read a word from the EEPROM using the regular EEPROM access register.
* Assume that we are in register window zero.
*/
static ushort read_eeprom(int ioaddr, int index)
{
outw(EEPROM_READ + index, ioaddr + 10);
/* Pause for at least 162 us for the read to take place.
* Some chips seem to require much longer.
*/
mdelay(2);
return inw(ioaddr + 12);
}
/* Read a word from the EEPROM when in the ISA ID probe state. */
static ushort id_read_eeprom(int index)
{
int bit, word = 0;
/* Issue read command, and pause for at least 162 us for it to
* complete. Assume extra-fast 16MHz bus.
*/
outb(EEPROM_READ + index, id_port);
/* Pause for at least 162 us for the read to take place.
* Some chips seem to require much longer.
*/
mdelay(4);
for (bit = 15; bit >= 0; bit--)
word = (word << 1) + (inb(id_port) & 0x01);
if (el3_debug > 3)
pr_debug(" 3c509 EEPROM word %d %#4.4x.\n", index, word);
return word;
}
static int el3_open(struct net_device *dev)
{
int ioaddr = dev->base_addr;
int i;
outw(TX_RESET, ioaddr + EL3_CMD);
outw(RX_RESET, ioaddr + EL3_CMD);
outw(SET_STATUS_ENB | 0x00, ioaddr + EL3_CMD);
i = request_irq(dev->irq, el3_interrupt, 0, dev->name, dev);
if (i)
return i;
EL3WINDOW(0);
if (el3_debug > 3)
pr_debug("%s: Opening, IRQ %d status@%x %4.4x.\n",
dev->name, dev->irq,
ioaddr + EL3_STATUS, inw(ioaddr + EL3_STATUS));
el3_up(dev);
if (el3_debug > 3)
pr_debug("%s: Opened 3c509 IRQ %d status %4.4x.\n",
dev->name, dev->irq, inw(ioaddr + EL3_STATUS));
return 0;
}
static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue)
{
int ioaddr = dev->base_addr;
/* Transmitter timeout, serious problems. */
pr_warn("%s: transmit timed out, Tx_status %2.2x status %4.4x Tx FIFO room %d\n",
dev->name, inb(ioaddr + TX_STATUS), inw(ioaddr + EL3_STATUS),
inw(ioaddr + TX_FREE));
dev->stats.tx_errors++;
netif_trans_update(dev); /* prevent tx timeout */
/* Issue TX_RESET and TX_START commands. */
outw(TX_RESET, ioaddr + EL3_CMD);
outw(TX_ENABLE, ioaddr + EL3_CMD);
netif_wake_queue(dev);
}
static netdev_tx_t el3_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct el3_private *lp = netdev_priv(dev);
int ioaddr = dev->base_addr;
unsigned long flags;
netif_stop_queue(dev);
dev->stats.tx_bytes += skb->len;
if (el3_debug > 4) {
pr_debug("%s: el3_start_xmit(length = %u) called, status %4.4x.\n",
dev->name, skb->len, inw(ioaddr + EL3_STATUS));
}
/*
* We lock the driver against other processors. Note
* we don't need to lock versus the IRQ as we suspended
* that. This means that we lose the ability to take
* an RX during a TX upload. That sucks a bit with SMP
* on an original 3c509 (2K buffer).
*
* Using disable_irq stops us crapping on other
* time sensitive devices.
*/
spin_lock_irqsave(&lp->lock, flags);
/* Put out the doubleword header... */
outw(skb->len, ioaddr + TX_FIFO);
outw(0x00, ioaddr + TX_FIFO);
/* ... and the packet rounded to a doubleword. */
outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
if (inw(ioaddr + TX_FREE) > 1536) {
netif_start_queue(dev);
} else {
/* Interrupt us when the FIFO has room for max-sized packet. */
outw(SET_TX_THRESHOLD + 1536, ioaddr + EL3_CMD);
}
spin_unlock_irqrestore(&lp->lock, flags);
dev_consume_skb_any(skb);
/* Clear the Tx status stack. */
{
short tx_status;
int i = 4;
while (--i > 0 && (tx_status = inb(ioaddr + TX_STATUS)) > 0) {
if (tx_status & 0x38)
dev->stats.tx_aborted_errors++;
if (tx_status & 0x30)
outw(TX_RESET, ioaddr + EL3_CMD);
if (tx_status & 0x3C)
outw(TX_ENABLE, ioaddr + EL3_CMD);
/* Pop the status stack. */
outb(0x00, ioaddr + TX_STATUS);
}
}
return NETDEV_TX_OK;
}
/* The EL3 interrupt handler. */
static irqreturn_t el3_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
int i = max_interrupt_work;
struct el3_private *lp;
int ioaddr, status;
lp = netdev_priv(dev);
spin_lock(&lp->lock);
ioaddr = dev->base_addr;
if (el3_debug > 4) {
status = inw(ioaddr + EL3_STATUS);
pr_debug("%s: interrupt, status %4.4x.\n", dev->name, status);
}
while ((status = inw(ioaddr + EL3_STATUS)) &
(INT_LATCH | RX_COMPLETE | STATS_FULL)) {
if (status & RX_COMPLETE)
el3_rx(dev);
if (status & TX_AVAILABLE) {
if (el3_debug > 5)
pr_debug(" TX room bit was handled.\n");
/* There's room in the FIFO for a full-sized packet. */
outw(ACK_INTR | TX_AVAILABLE, ioaddr + EL3_CMD);
netif_wake_queue(dev);
}
if (status &
(ADAPTER_FAILURE | RX_EARLY | STATS_FULL | TX_COMPLETE)) {
/* Handle all uncommon interrupts. */
if (status & STATS_FULL) {
/* Empty statistics. */
update_stats(dev);
}
if (status & RX_EARLY) {
/* Rx early is unused. */
el3_rx(dev);
outw(ACK_INTR | RX_EARLY, ioaddr + EL3_CMD);
}
if (status & TX_COMPLETE) {
/* Really Tx error. */
short tx_status;
int i = 4;
while (--i > 0 &&
((tx_status = inb(ioaddr + TX_STATUS))
> 0)) {
if (tx_status & 0x38)
dev->stats.tx_aborted_errors++;
if (tx_status & 0x30)
outw(TX_RESET,
ioaddr + EL3_CMD);
if (tx_status & 0x3C)
outw(TX_ENABLE,
ioaddr + EL3_CMD);
/* Pop the status stack. */
outb(0x00, ioaddr + TX_STATUS);
}
}
if (status & ADAPTER_FAILURE) {
/* Adapter failure requires Rx reset
* and reinit.
*/
outw(RX_RESET, ioaddr + EL3_CMD);
/* Set the Rx filter to the current state. */
outw((SET_RX_FILTER | RX_STATION |
RX_BROADCAST |
(dev->flags & IFF_ALLMULTI ?
RX_MULTICAST : 0) |
(dev->flags & IFF_PROMISC ?
RX_PROM : 0)),
ioaddr + EL3_CMD);
/* Re-enable the receiver. */
outw(RX_ENABLE, ioaddr + EL3_CMD);
outw(ACK_INTR | ADAPTER_FAILURE,
ioaddr + EL3_CMD);
}
}
if (--i < 0) {
pr_err("%s: Infinite loop in interrupt, status %4.4x.\n",
dev->name, status);
/* Clear all interrupts. */
outw(ACK_INTR | 0xFF, ioaddr + EL3_CMD);
break;
}
/* Acknowledge the IRQ. */
outw(ACK_INTR | INT_REQ | INT_LATCH, ioaddr + EL3_CMD);
}
if (el3_debug > 4) {
pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name,
inw(ioaddr + EL3_STATUS));
}
spin_unlock(&lp->lock);
return IRQ_HANDLED;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
/*
* Polling receive - used by netconsole and other diagnostic tools
* to allow network i/o with interrupts disabled.
*/
static void el3_poll_controller(struct net_device *dev)
{
disable_irq(dev->irq);
el3_interrupt(dev->irq, dev);
enable_irq(dev->irq);
}
#endif
static struct net_device_stats *el3_get_stats(struct net_device *dev)
{
struct el3_private *lp = netdev_priv(dev);
unsigned long flags;
/* This is fast enough not to bother with disable IRQ stuff. */
spin_lock_irqsave(&lp->lock, flags);
update_stats(dev);
spin_unlock_irqrestore(&lp->lock, flags);
return &dev->stats;
}
/* Update statistics. We change to register window 6, so this should be run
* single-threaded if the device is active. This is expected to be a rare
* operation, and it's simpler for the rest of the driver to assume that
* window 1 is always valid rather than use a special window-state variable.
*/
static void update_stats(struct net_device *dev)
{
int ioaddr = dev->base_addr;
if (el3_debug > 5)
pr_debug(" Updating the statistics.\n");
/* Turn off statistics updates while reading. */
outw(STATS_DISABLE, ioaddr + EL3_CMD);
/* 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);
/* Rx packets */ inb(ioaddr + 7);
/* Tx deferrals */ inb(ioaddr + 8);
inw(ioaddr + 10); /* Total Rx and Tx octets. */
inw(ioaddr + 12);
/* Back to window 1, and turn statistics back on. */
EL3WINDOW(1);
outw(STATS_ENABLE, ioaddr + EL3_CMD);
}
static int el3_rx(struct net_device *dev)
{
int ioaddr = dev->base_addr;
short rx_status;
if (el3_debug > 5)
pr_debug(" In rx_packet(), status %4.4x, rx_status %4.4x.\n",
inw(ioaddr + EL3_STATUS), inw(ioaddr + RX_STATUS));
while ((rx_status = inw(ioaddr + RX_STATUS)) > 0) {
if (rx_status & 0x4000) {
/* Error, update stats. */
short error = rx_status & 0x3800;
outw(RX_DISCARD, ioaddr + EL3_CMD);
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);
if (el3_debug > 4)
pr_debug("Receiving packet size %d status %4.4x.\n",
pkt_len, rx_status);
if (skb) {
/* Align IP on 16 byte. */
skb_reserve(skb, 2);
/* 'skb->data' points to the start of sk_buff
* data area.
*/
insl(ioaddr + RX_FIFO, skb_put(skb, pkt_len),
(pkt_len + 3) >> 2);
/* Pop top Rx packet. */
outw(RX_DISCARD, ioaddr + EL3_CMD);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->stats.rx_bytes += pkt_len;
dev->stats.rx_packets++;
continue;
}
outw(RX_DISCARD, ioaddr + EL3_CMD);
dev->stats.rx_dropped++;
if (el3_debug)
pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n",
dev->name, pkt_len);
}
inw(ioaddr + EL3_STATUS); /* Delay. */
while (inw(ioaddr + EL3_STATUS) & 0x1000)
pr_debug(" Waiting for 3c509 to discard packet, status %x.\n",
inw(ioaddr + EL3_STATUS));
}
return 0;
}
/* Set or clear the multicast filter for this adaptor. */
static void set_multicast_list(struct net_device *dev)
{
struct el3_private *lp = netdev_priv(dev);
int ioaddr = dev->base_addr;
int mc_count = netdev_mc_count(dev);
unsigned long flags;
if (el3_debug > 1) {
static int old;
if (old != mc_count) {
old = mc_count;
pr_debug("%s: Setting Rx mode to %d addresses.\n",
dev->name, mc_count);
}
}
spin_lock_irqsave(&lp->lock, flags);
if (dev->flags & IFF_PROMISC) {
outw((SET_RX_FILTER | RX_STATION | RX_MULTICAST |
RX_BROADCAST | RX_PROM),
ioaddr + EL3_CMD);
} else if (mc_count || (dev->flags & IFF_ALLMULTI)) {
outw(SET_RX_FILTER | RX_STATION | RX_MULTICAST | RX_BROADCAST,
ioaddr + EL3_CMD);
} else {
outw(SET_RX_FILTER | RX_STATION | RX_BROADCAST,
ioaddr + EL3_CMD);
}
spin_unlock_irqrestore(&lp->lock, flags);
}
static int el3_close(struct net_device *dev)
{
struct el3_private *lp = netdev_priv(dev);
int ioaddr = dev->base_addr;
if (el3_debug > 2)
pr_debug("%s: Shutting down ethercard.\n", dev->name);
el3_down(dev);
free_irq(dev->irq, dev);
/* Switching back to window 0 disables the IRQ. */
EL3WINDOW(0);
if (lp->type != EL3_EISA) {
/* But we explicitly zero the IRQ line select anyway. Don't do
* it on EISA cards, it prevents the module from getting an
* IRQ after unload+reload...
*/
outw(0x0f00, ioaddr + WN0_IRQ);
}
return 0;
}
static int el3_link_ok(struct net_device *dev)
{
int ioaddr = dev->base_addr;
u16 tmp;
EL3WINDOW(4);
tmp = inw(ioaddr + WN4_MEDIA);
EL3WINDOW(1);
return tmp & (1 << 11);
}
static void el3_netdev_get_ecmd(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
int ioaddr = dev->base_addr;
u32 supported;
u16 tmp;
EL3WINDOW(0);
/* Obtain current transceiver via WN4_MEDIA? */
tmp = inw(ioaddr + WN0_ADDR_CONF);
switch (tmp >> 14) {
case 0:
cmd->base.port = PORT_TP;
break;
case 1:
cmd->base.port = PORT_AUI;
break;
case 3:
cmd->base.port = PORT_BNC;
break;
default:
break;
}
cmd->base.duplex = DUPLEX_HALF;
supported = 0;
tmp = inw(ioaddr + WN0_CONF_CTRL);
if (tmp & (1 << 13))
supported |= SUPPORTED_AUI;
if (tmp & (1 << 12))
supported |= SUPPORTED_BNC;
if (tmp & (1 << 9)) {
supported |= SUPPORTED_TP | SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full; /* hmm... */
EL3WINDOW(4);
tmp = inw(ioaddr + WN4_NETDIAG);
if (tmp & FD_ENABLE)
cmd->base.duplex = DUPLEX_FULL;
}
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
supported);
cmd->base.speed = SPEED_10;
EL3WINDOW(1);
}
static int el3_netdev_set_ecmd(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
int ioaddr = dev->base_addr;
u16 tmp;
if (cmd->base.speed != SPEED_10)
return -EINVAL;
if (cmd->base.duplex != DUPLEX_HALF && cmd->base.duplex != DUPLEX_FULL)
return -EINVAL;
/* change XCVR type */
EL3WINDOW(0);
tmp = inw(ioaddr + WN0_ADDR_CONF);
switch (cmd->base.port) {
case PORT_TP:
tmp &= ~(3 << 14);
dev->if_port = 0;
break;
case PORT_AUI:
tmp &= ~(3 << 14);
tmp |= 1 << 14;
dev->if_port = 1;
break;
case PORT_BNC:
tmp |= 3 << 14;
dev->if_port = 3;
break;
default:
return -EINVAL;
}
outw(tmp, ioaddr + WN0_ADDR_CONF);
if (dev->if_port == 3) {
/* Fire up the DC-DC converter if BNC gets enabled. */
tmp = inw(ioaddr + WN0_ADDR_CONF);
if (tmp & (3 << 14)) {
outw(START_COAX, ioaddr + EL3_CMD);
udelay(800);
} else {
return -EIO;
}
}
EL3WINDOW(4);
tmp = inw(ioaddr + WN4_NETDIAG);
if (cmd->base.duplex == DUPLEX_FULL)
tmp |= FD_ENABLE;
else
tmp &= ~FD_ENABLE;
outw(tmp, ioaddr + WN4_NETDIAG);
EL3WINDOW(1);
return 0;
}
static void el3_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strscpy(info->driver, DRV_NAME, sizeof(info->driver));
}
static int el3_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct el3_private *lp = netdev_priv(dev);
spin_lock_irq(&lp->lock);
el3_netdev_get_ecmd(dev, cmd);
spin_unlock_irq(&lp->lock);
return 0;
}
static int el3_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct el3_private *lp = netdev_priv(dev);
int ret;
spin_lock_irq(&lp->lock);
ret = el3_netdev_set_ecmd(dev, cmd);
spin_unlock_irq(&lp->lock);
return ret;
}
static u32 el3_get_link(struct net_device *dev)
{
struct el3_private *lp = netdev_priv(dev);
u32 ret;
spin_lock_irq(&lp->lock);
ret = el3_link_ok(dev);
spin_unlock_irq(&lp->lock);
return ret;
}
static u32 el3_get_msglevel(struct net_device *dev)
{
return el3_debug;
}
static void el3_set_msglevel(struct net_device *dev, u32 v)
{
el3_debug = v;
}
static const struct ethtool_ops ethtool_ops = {
.get_drvinfo = el3_get_drvinfo,
.get_link = el3_get_link,
.get_msglevel = el3_get_msglevel,
.set_msglevel = el3_set_msglevel,
.get_link_ksettings = el3_get_link_ksettings,
.set_link_ksettings = el3_set_link_ksettings,
};
static void el3_down(struct net_device *dev)
{
int ioaddr = dev->base_addr;
netif_stop_queue(dev);
/* Turn off statistics ASAP. We update lp->stats below. */
outw(STATS_DISABLE, ioaddr + EL3_CMD);
/* Disable the receiver and transmitter. */
outw(RX_DISABLE, ioaddr + EL3_CMD);
outw(TX_DISABLE, ioaddr + EL3_CMD);
if (dev->if_port == 3) {
/* Turn off thinnet power. Green! */
outw(STOP_COAX, ioaddr + EL3_CMD);
} else if (dev->if_port == 0) {
/* Disable link beat and jabber, if_port may change here next
* open().
*/
EL3WINDOW(4);
outw(inw(ioaddr + WN4_MEDIA) & ~MEDIA_TP, ioaddr + WN4_MEDIA);
}
outw(SET_INTR_ENB | 0x0000, ioaddr + EL3_CMD);
update_stats(dev);
}
static void el3_up(struct net_device *dev)
{
int ioaddr = dev->base_addr;
int i, sw_info, net_diag;
/* Activating the board required and does no harm otherwise. */
outw(0x0001, ioaddr + 4);
/* Set the IRQ line. */
outw((dev->irq << 12) | 0x0f00, ioaddr + WN0_IRQ);
/* Set the station address in window 2 each time opened. */
EL3WINDOW(2);
for (i = 0; i < 6; i++)
outb(dev->dev_addr[i], ioaddr + i);
if ((dev->if_port & 0x03) == 3) {
/* BNC interface */
/* Start the thinnet transceiver. We should really wait
* 50ms...
*/
outw(START_COAX, ioaddr + EL3_CMD);
} else if ((dev->if_port & 0x03) == 0) {
/* 10baseT interface */
/* Combine secondary sw_info word (the adapter level) and
* primary sw_info word (duplex setting plus other useless
* bits).
*/
EL3WINDOW(0);
sw_info = (read_eeprom(ioaddr, 0x14) & 0x400f) |
(read_eeprom(ioaddr, 0x0d) & 0xBff0);
EL3WINDOW(4);
net_diag = inw(ioaddr + WN4_NETDIAG);
/* Temporarily assume full-duplex will be set. */
net_diag = (net_diag | FD_ENABLE);
pr_info("%s: ", dev->name);
switch (dev->if_port & 0x0c) {
case 12:
/* Force full-duplex mode if 3c5x9b. */
if (sw_info & 0x000f) {
pr_cont("Forcing 3c5x9b full-duplex mode");
break;
}
fallthrough;
case 8:
/* Set full-duplex mode based on eeprom config
* setting.
*/
if ((sw_info & 0x000f) && (sw_info & 0x8000)) {
pr_cont("Setting 3c5x9b full-duplex mode (from EEPROM configuration bit)");
break;
}
fallthrough;
default:
/* xcvr = (0 || 4) OR user has an old 3c5x9 non "B"
* model.
*/
pr_cont("Setting 3c5x9/3c5x9B half-duplex mode");
/* Disable full duplex. */
net_diag = (net_diag & ~FD_ENABLE);
}
outw(net_diag, ioaddr + WN4_NETDIAG);
pr_cont(" if_port: %d, sw_info: %4.4x\n",
dev->if_port, sw_info);
if (el3_debug > 3)
pr_debug("%s: 3c5x9 net diag word is now: %4.4x.\n",
dev->name, net_diag);
/* Enable link beat and jabber check. */
outw(inw(ioaddr + WN4_MEDIA) | MEDIA_TP, ioaddr + WN4_MEDIA);
}
/* Switch to the stats window, and clear all stats by reading. */
outw(STATS_DISABLE, ioaddr + EL3_CMD);
EL3WINDOW(6);
for (i = 0; i < 9; i++)
inb(ioaddr + i);
inw(ioaddr + 10);
inw(ioaddr + 12);
/* Switch to register set 1 for normal use. */
EL3WINDOW(1);
/* Accept b-case and phys addr only. */
outw(SET_RX_FILTER | RX_STATION | RX_BROADCAST, ioaddr + EL3_CMD);
/* Turn on statistics. */
outw(STATS_ENABLE, ioaddr + EL3_CMD);
/* Enable the receiver. */
outw(RX_ENABLE, ioaddr + EL3_CMD);
/* Enable transmitter. */
outw(TX_ENABLE, ioaddr + EL3_CMD);
/* Allow status bits to be seen. */
outw(SET_STATUS_ENB | 0xff, ioaddr + EL3_CMD);
/* Ack all pending events, and set active indicator mask. */
outw(ACK_INTR | INT_LATCH | TX_AVAILABLE | RX_EARLY | INT_REQ,
ioaddr + EL3_CMD);
outw((SET_INTR_ENB | INT_LATCH | TX_AVAILABLE | TX_COMPLETE |
RX_COMPLETE | STATS_FULL),
ioaddr + EL3_CMD);
netif_start_queue(dev);
}
/* Power Management support functions */
#ifdef CONFIG_PM
static int el3_suspend(struct device *pdev, pm_message_t state)
{
struct net_device *dev;
struct el3_private *lp;
unsigned long flags;
int ioaddr;
dev = dev_get_drvdata(pdev);
lp = netdev_priv(dev);
ioaddr = dev->base_addr;
spin_lock_irqsave(&lp->lock, flags);
if (netif_running(dev))
netif_device_detach(dev);
el3_down(dev);
outw(POWER_DOWN, ioaddr + EL3_CMD);
spin_unlock_irqrestore(&lp->lock, flags);
return 0;
}
static int el3_resume(struct device *pdev)
{
struct net_device *dev;
struct el3_private *lp;
unsigned long flags;
int ioaddr;
dev = dev_get_drvdata(pdev);
lp = netdev_priv(dev);
ioaddr = dev->base_addr;
spin_lock_irqsave(&lp->lock, flags);
outw(POWER_UP, ioaddr + EL3_CMD);
EL3WINDOW(0);
el3_up(dev);
if (netif_running(dev))
netif_device_attach(dev);
spin_unlock_irqrestore(&lp->lock, flags);
return 0;
}
#endif /* CONFIG_PM */
module_param(debug, int, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param(max_interrupt_work, int, 0);
MODULE_PARM_DESC(debug, "debug level (0-6)");
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
MODULE_PARM_DESC(max_interrupt_work, "maximum events handled per interrupt");
#ifdef CONFIG_PNP
module_param(nopnp, int, 0);
MODULE_PARM_DESC(nopnp, "disable ISA PnP support (0-1)");
#endif /* CONFIG_PNP */
MODULE_DESCRIPTION("3Com Etherlink III (3c509, 3c509B, 3c529, 3c579) ethernet driver");
MODULE_LICENSE("GPL");
static int __init el3_init_module(void)
{
int ret = 0;
if (debug >= 0)
el3_debug = debug;
#ifdef CONFIG_PNP
if (!nopnp) {
ret = pnp_register_driver(&el3_pnp_driver);
if (!ret)
pnp_registered = 1;
}
#endif
/* Select an open I/O location at 0x1*0 to do ISA contention select. */
/* Start with 0x110 to avoid some sound cards.*/
for (id_port = 0x110; id_port < 0x200; id_port += 0x10) {
if (!request_region(id_port, 1, "3c509-control"))
continue;
outb(0x00, id_port);
outb(0xff, id_port);
if (inb(id_port) & 0x01)
break;
release_region(id_port, 1);
}
if (id_port >= 0x200) {
id_port = 0;
pr_err("No I/O port available for 3c509 activation.\n");
} else {
ret = isa_register_driver(&el3_isa_driver, EL3_MAX_CARDS);
if (!ret)
isa_registered = 1;
}
#ifdef CONFIG_EISA
ret = eisa_driver_register(&el3_eisa_driver);
if (!ret)
eisa_registered = 1;
#endif
#ifdef CONFIG_PNP
if (pnp_registered)
ret = 0;
#endif
if (isa_registered)
ret = 0;
#ifdef CONFIG_EISA
if (eisa_registered)
ret = 0;
#endif
return ret;
}
static void __exit el3_cleanup_module(void)
{
#ifdef CONFIG_PNP
if (pnp_registered)
pnp_unregister_driver(&el3_pnp_driver);
#endif
if (isa_registered)
isa_unregister_driver(&el3_isa_driver);
if (id_port)
release_region(id_port, 1);
#ifdef CONFIG_EISA
if (eisa_registered)
eisa_driver_unregister(&el3_eisa_driver);
#endif
}
module_init(el3_init_module);
module_exit(el3_cleanup_module);
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