/*======================================================================
|
|
A PCMCIA ethernet driver for Asix AX88190-based cards
|
|
The Asix AX88190 is a NS8390-derived chipset with a few nasty
|
idiosyncracies that make it very inconvenient to support with a
|
standard 8390 driver. This driver is based on pcnet_cs, with the
|
tweaked 8390 code grafted on the end. Much of what I did was to
|
clean up and update a similar driver supplied by Asix, which was
|
adapted by William Lee, william@asix.com.tw.
|
|
Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
|
|
axnet_cs.c 1.28 2002/06/29 06:27:37
|
|
The network driver code is based on Donald Becker's NE2000 code:
|
|
Written 1992,1993 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.
|
Donald Becker may be reached at becker@scyld.com
|
|
======================================================================*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
#include <linux/kernel.h>
|
#include <linux/module.h>
|
#include <linux/ptrace.h>
|
#include <linux/string.h>
|
#include <linux/timer.h>
|
#include <linux/delay.h>
|
#include <linux/spinlock.h>
|
#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/crc32.h>
|
#include <linux/mii.h>
|
#include "8390.h"
|
|
#include <pcmcia/cistpl.h>
|
#include <pcmcia/ciscode.h>
|
#include <pcmcia/ds.h>
|
#include <pcmcia/cisreg.h>
|
|
#include <asm/io.h>
|
#include <asm/byteorder.h>
|
#include <linux/uaccess.h>
|
|
#define AXNET_CMD 0x00
|
#define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
|
#define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
|
#define AXNET_MII_EEP 0x14 /* Offset of MII access port */
|
#define AXNET_TEST 0x15 /* Offset of TEST Register port */
|
#define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
|
|
#define AXNET_START_PG 0x40 /* First page of TX buffer */
|
#define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
|
|
#define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
|
|
#define IS_AX88190 0x0001
|
#define IS_AX88790 0x0002
|
|
/*====================================================================*/
|
|
/* Module parameters */
|
|
MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
|
MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
|
MODULE_LICENSE("GPL");
|
|
|
/*====================================================================*/
|
|
static int axnet_config(struct pcmcia_device *link);
|
static void axnet_release(struct pcmcia_device *link);
|
static int axnet_open(struct net_device *dev);
|
static int axnet_close(struct net_device *dev);
|
static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
|
static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
|
struct net_device *dev);
|
static struct net_device_stats *get_stats(struct net_device *dev);
|
static void set_multicast_list(struct net_device *dev);
|
static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue);
|
static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
|
static void ei_watchdog(struct timer_list *t);
|
static void axnet_reset_8390(struct net_device *dev);
|
|
static int mdio_read(unsigned int addr, int phy_id, int loc);
|
static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
|
|
static void get_8390_hdr(struct net_device *,
|
struct e8390_pkt_hdr *, int);
|
static void block_input(struct net_device *dev, int count,
|
struct sk_buff *skb, int ring_offset);
|
static void block_output(struct net_device *dev, int count,
|
const u_char *buf, const int start_page);
|
|
static void axnet_detach(struct pcmcia_device *p_dev);
|
|
static void AX88190_init(struct net_device *dev, int startp);
|
static int ax_open(struct net_device *dev);
|
static int ax_close(struct net_device *dev);
|
static irqreturn_t ax_interrupt(int irq, void *dev_id);
|
|
/*====================================================================*/
|
|
struct axnet_dev {
|
struct pcmcia_device *p_dev;
|
caddr_t base;
|
struct timer_list watchdog;
|
int stale, fast_poll;
|
u_short link_status;
|
u_char duplex_flag;
|
int phy_id;
|
int flags;
|
int active_low;
|
};
|
|
static inline struct axnet_dev *PRIV(struct net_device *dev)
|
{
|
void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
|
return p;
|
}
|
|
static const struct net_device_ops axnet_netdev_ops = {
|
.ndo_open = axnet_open,
|
.ndo_stop = axnet_close,
|
.ndo_do_ioctl = axnet_ioctl,
|
.ndo_start_xmit = axnet_start_xmit,
|
.ndo_tx_timeout = axnet_tx_timeout,
|
.ndo_get_stats = get_stats,
|
.ndo_set_rx_mode = set_multicast_list,
|
.ndo_set_mac_address = eth_mac_addr,
|
.ndo_validate_addr = eth_validate_addr,
|
};
|
|
static int axnet_probe(struct pcmcia_device *link)
|
{
|
struct axnet_dev *info;
|
struct net_device *dev;
|
struct ei_device *ei_local;
|
|
dev_dbg(&link->dev, "axnet_attach()\n");
|
|
dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(struct axnet_dev));
|
if (!dev)
|
return -ENOMEM;
|
|
ei_local = netdev_priv(dev);
|
spin_lock_init(&ei_local->page_lock);
|
|
info = PRIV(dev);
|
info->p_dev = link;
|
link->priv = dev;
|
link->config_flags |= CONF_ENABLE_IRQ;
|
|
dev->netdev_ops = &axnet_netdev_ops;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
return axnet_config(link);
|
} /* axnet_attach */
|
|
static void axnet_detach(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
|
dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
|
|
unregister_netdev(dev);
|
|
axnet_release(link);
|
|
free_netdev(dev);
|
} /* axnet_detach */
|
|
/*======================================================================
|
|
This probes for a card's hardware address by reading the PROM.
|
|
======================================================================*/
|
|
static int get_prom(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
unsigned int ioaddr = dev->base_addr;
|
int i, j;
|
|
/* This is based on drivers/net/ethernet/8390/ne.c */
|
struct {
|
u_char value, offset;
|
} program_seq[] = {
|
{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
|
{0x01, EN0_DCFG}, /* Set word-wide access. */
|
{0x00, EN0_RCNTLO}, /* Clear the count regs. */
|
{0x00, EN0_RCNTHI},
|
{0x00, EN0_IMR}, /* Mask completion irq. */
|
{0xFF, EN0_ISR},
|
{E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
|
{E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
|
{0x10, EN0_RCNTLO},
|
{0x00, EN0_RCNTHI},
|
{0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
|
{0x04, EN0_RSARHI},
|
{E8390_RREAD+E8390_START, E8390_CMD},
|
};
|
|
/* Not much of a test, but the alternatives are messy */
|
if (link->config_base != 0x03c0)
|
return 0;
|
|
axnet_reset_8390(dev);
|
mdelay(10);
|
|
for (i = 0; i < ARRAY_SIZE(program_seq); i++)
|
outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
|
|
for (i = 0; i < 6; i += 2) {
|
j = inw(ioaddr + AXNET_DATAPORT);
|
dev->dev_addr[i] = j & 0xff;
|
dev->dev_addr[i+1] = j >> 8;
|
}
|
return 1;
|
} /* get_prom */
|
|
static int try_io_port(struct pcmcia_device *link)
|
{
|
int j, ret;
|
link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
|
link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
|
if (link->resource[0]->end == 32) {
|
link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
|
/* for master/slave multifunction cards */
|
if (link->resource[1]->end > 0)
|
link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
|
} else {
|
/* This should be two 16-port windows */
|
link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
|
link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
|
}
|
if (link->resource[0]->start == 0) {
|
for (j = 0; j < 0x400; j += 0x20) {
|
link->resource[0]->start = j ^ 0x300;
|
link->resource[1]->start = (j ^ 0x300) + 0x10;
|
link->io_lines = 16;
|
ret = pcmcia_request_io(link);
|
if (ret == 0)
|
return ret;
|
}
|
return ret;
|
} else {
|
return pcmcia_request_io(link);
|
}
|
}
|
|
static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
|
{
|
if (p_dev->config_index == 0)
|
return -EINVAL;
|
|
p_dev->config_index = 0x05;
|
if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
|
return -ENODEV;
|
|
return try_io_port(p_dev);
|
}
|
|
static int axnet_config(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
struct axnet_dev *info = PRIV(dev);
|
int i, j, j2, ret;
|
|
dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
|
|
/* don't trust the CIS on this; Linksys got it wrong */
|
link->config_regs = 0x63;
|
link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
|
ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
|
if (ret != 0)
|
goto failed;
|
|
if (!link->irq)
|
goto failed;
|
|
if (resource_size(link->resource[1]) == 8)
|
link->config_flags |= CONF_ENABLE_SPKR;
|
|
ret = pcmcia_enable_device(link);
|
if (ret)
|
goto failed;
|
|
dev->irq = link->irq;
|
dev->base_addr = link->resource[0]->start;
|
|
if (!get_prom(link)) {
|
pr_notice("this is not an AX88190 card!\n");
|
pr_notice("use pcnet_cs instead.\n");
|
goto failed;
|
}
|
|
ei_status.name = "AX88190";
|
ei_status.word16 = 1;
|
ei_status.tx_start_page = AXNET_START_PG;
|
ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
|
ei_status.stop_page = AXNET_STOP_PG;
|
ei_status.reset_8390 = axnet_reset_8390;
|
ei_status.get_8390_hdr = get_8390_hdr;
|
ei_status.block_input = block_input;
|
ei_status.block_output = block_output;
|
|
if (inb(dev->base_addr + AXNET_TEST) != 0)
|
info->flags |= IS_AX88790;
|
else
|
info->flags |= IS_AX88190;
|
|
if (info->flags & IS_AX88790)
|
outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
|
|
info->active_low = 0;
|
|
for (i = 0; i < 32; i++) {
|
j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
|
j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
|
if (j == j2) continue;
|
if ((j != 0) && (j != 0xffff)) break;
|
}
|
|
if (i == 32) {
|
/* Maybe PHY is in power down mode. (PPD_SET = 1)
|
Bit 2 of CCSR is active low. */
|
pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
|
for (i = 0; i < 32; i++) {
|
j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
|
j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
|
if (j == j2) continue;
|
if ((j != 0) && (j != 0xffff)) {
|
info->active_low = 1;
|
break;
|
}
|
}
|
}
|
|
info->phy_id = (i < 32) ? i : -1;
|
SET_NETDEV_DEV(dev, &link->dev);
|
|
if (register_netdev(dev) != 0) {
|
pr_notice("register_netdev() failed\n");
|
goto failed;
|
}
|
|
netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
|
((info->flags & IS_AX88790) ? 7 : 1),
|
dev->base_addr, dev->irq, dev->dev_addr);
|
if (info->phy_id != -1) {
|
netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
|
info->phy_id, j);
|
} else {
|
netdev_notice(dev, " No MII transceivers found!\n");
|
}
|
return 0;
|
|
failed:
|
axnet_release(link);
|
return -ENODEV;
|
} /* axnet_config */
|
|
static void axnet_release(struct pcmcia_device *link)
|
{
|
pcmcia_disable_device(link);
|
}
|
|
static int axnet_suspend(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
|
if (link->open)
|
netif_device_detach(dev);
|
|
return 0;
|
}
|
|
static int axnet_resume(struct pcmcia_device *link)
|
{
|
struct net_device *dev = link->priv;
|
struct axnet_dev *info = PRIV(dev);
|
|
if (link->open) {
|
if (info->active_low == 1)
|
pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
|
|
axnet_reset_8390(dev);
|
AX88190_init(dev, 1);
|
netif_device_attach(dev);
|
}
|
|
return 0;
|
}
|
|
|
/*======================================================================
|
|
MII interface support
|
|
======================================================================*/
|
|
#define MDIO_SHIFT_CLK 0x01
|
#define MDIO_DATA_WRITE0 0x00
|
#define MDIO_DATA_WRITE1 0x08
|
#define MDIO_DATA_READ 0x04
|
#define MDIO_MASK 0x0f
|
#define MDIO_ENB_IN 0x02
|
|
static void mdio_sync(unsigned int addr)
|
{
|
int bits;
|
for (bits = 0; bits < 32; bits++) {
|
outb_p(MDIO_DATA_WRITE1, addr);
|
outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
|
}
|
}
|
|
static int mdio_read(unsigned int addr, int phy_id, int loc)
|
{
|
u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
|
int i, retval = 0;
|
|
mdio_sync(addr);
|
for (i = 14; i >= 0; i--) {
|
int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
|
outb_p(dat, addr);
|
outb_p(dat | MDIO_SHIFT_CLK, addr);
|
}
|
for (i = 19; i > 0; i--) {
|
outb_p(MDIO_ENB_IN, addr);
|
retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
|
outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
|
}
|
return (retval>>1) & 0xffff;
|
}
|
|
static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
|
{
|
u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
|
int i;
|
|
mdio_sync(addr);
|
for (i = 31; i >= 0; i--) {
|
int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
|
outb_p(dat, addr);
|
outb_p(dat | MDIO_SHIFT_CLK, addr);
|
}
|
for (i = 1; i >= 0; i--) {
|
outb_p(MDIO_ENB_IN, addr);
|
outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
|
}
|
}
|
|
/*====================================================================*/
|
|
static int axnet_open(struct net_device *dev)
|
{
|
int ret;
|
struct axnet_dev *info = PRIV(dev);
|
struct pcmcia_device *link = info->p_dev;
|
unsigned int nic_base = dev->base_addr;
|
|
dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
|
|
if (!pcmcia_dev_present(link))
|
return -ENODEV;
|
|
outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
|
ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
|
if (ret)
|
return ret;
|
|
link->open++;
|
|
info->link_status = 0x00;
|
timer_setup(&info->watchdog, ei_watchdog, 0);
|
mod_timer(&info->watchdog, jiffies + HZ);
|
|
return ax_open(dev);
|
} /* axnet_open */
|
|
/*====================================================================*/
|
|
static int axnet_close(struct net_device *dev)
|
{
|
struct axnet_dev *info = PRIV(dev);
|
struct pcmcia_device *link = info->p_dev;
|
|
dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
|
|
ax_close(dev);
|
free_irq(dev->irq, dev);
|
|
link->open--;
|
netif_stop_queue(dev);
|
del_timer_sync(&info->watchdog);
|
|
return 0;
|
} /* axnet_close */
|
|
/*======================================================================
|
|
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 axnet_reset_8390(struct net_device *dev)
|
{
|
unsigned int nic_base = dev->base_addr;
|
int i;
|
|
ei_status.txing = ei_status.dmaing = 0;
|
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
|
|
outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
|
|
for (i = 0; i < 100; i++) {
|
if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
|
break;
|
udelay(100);
|
}
|
outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
|
|
if (i == 100)
|
netdev_err(dev, "axnet_reset_8390() did not complete\n");
|
|
} /* axnet_reset_8390 */
|
|
/*====================================================================*/
|
|
static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
|
{
|
struct net_device *dev = dev_id;
|
PRIV(dev)->stale = 0;
|
return ax_interrupt(irq, dev_id);
|
}
|
|
static void ei_watchdog(struct timer_list *t)
|
{
|
struct axnet_dev *info = from_timer(info, t, watchdog);
|
struct net_device *dev = info->p_dev->priv;
|
unsigned int nic_base = dev->base_addr;
|
unsigned int mii_addr = nic_base + AXNET_MII_EEP;
|
u_short link;
|
|
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 (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
|
if (!info->fast_poll)
|
netdev_info(dev, "interrupt(s) dropped!\n");
|
ei_irq_wrapper(dev->irq, dev);
|
info->fast_poll = HZ;
|
}
|
if (info->fast_poll) {
|
info->fast_poll--;
|
info->watchdog.expires = jiffies + 1;
|
add_timer(&info->watchdog);
|
return;
|
}
|
|
if (info->phy_id < 0)
|
goto reschedule;
|
link = mdio_read(mii_addr, info->phy_id, 1);
|
if (!link || (link == 0xffff)) {
|
netdev_info(dev, "MII is missing!\n");
|
info->phy_id = -1;
|
goto reschedule;
|
}
|
|
link &= 0x0004;
|
if (link != info->link_status) {
|
u_short p = mdio_read(mii_addr, info->phy_id, 5);
|
netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
|
if (link) {
|
info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
|
if (p)
|
netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
|
(p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
|
else
|
netdev_info(dev, "link partner did not autonegotiate\n");
|
AX88190_init(dev, 1);
|
}
|
info->link_status = link;
|
}
|
|
reschedule:
|
info->watchdog.expires = jiffies + HZ;
|
add_timer(&info->watchdog);
|
}
|
|
/*====================================================================*/
|
|
static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
|
{
|
struct axnet_dev *info = PRIV(dev);
|
struct mii_ioctl_data *data = if_mii(rq);
|
unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
|
switch (cmd) {
|
case SIOCGMIIPHY:
|
data->phy_id = info->phy_id;
|
fallthrough;
|
case SIOCGMIIREG: /* Read MII PHY register. */
|
data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
|
return 0;
|
case SIOCSMIIREG: /* Write MII PHY register. */
|
mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
|
return 0;
|
}
|
return -EOPNOTSUPP;
|
}
|
|
/*====================================================================*/
|
|
static void get_8390_hdr(struct net_device *dev,
|
struct e8390_pkt_hdr *hdr,
|
int ring_page)
|
{
|
unsigned int nic_base = dev->base_addr;
|
|
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 + AXNET_CMD);
|
|
insw(nic_base + AXNET_DATAPORT, hdr,
|
sizeof(struct e8390_pkt_hdr)>>1);
|
/* Fix for big endian systems */
|
hdr->count = le16_to_cpu(hdr->count);
|
|
}
|
|
/*====================================================================*/
|
|
static void block_input(struct net_device *dev, int count,
|
struct sk_buff *skb, int ring_offset)
|
{
|
unsigned int nic_base = dev->base_addr;
|
struct ei_device *ei_local = netdev_priv(dev);
|
int xfer_count = count;
|
char *buf = skb->data;
|
|
if ((netif_msg_rx_status(ei_local)) && (count != 4))
|
netdev_dbg(dev, "[bi=%d]\n", count+4);
|
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 + AXNET_CMD);
|
|
insw(nic_base + AXNET_DATAPORT,buf,count>>1);
|
if (count & 0x01) {
|
buf[count-1] = inb(nic_base + AXNET_DATAPORT);
|
xfer_count++;
|
}
|
|
}
|
|
/*====================================================================*/
|
|
static void block_output(struct net_device *dev, int count,
|
const u_char *buf, const int start_page)
|
{
|
unsigned int nic_base = dev->base_addr;
|
|
pr_debug("%s: [bo=%d]\n", dev->name, count);
|
|
/* 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 (count & 0x01)
|
count++;
|
|
outb_p(0x00, nic_base + EN0_RSARLO);
|
outb_p(start_page, nic_base + EN0_RSARHI);
|
outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
|
outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
|
}
|
|
static const struct pcmcia_device_id axnet_ids[] = {
|
PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
|
PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
|
PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
|
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
|
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
|
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
|
PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
|
PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
|
PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
|
PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
|
PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
|
PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
|
PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
|
PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
|
PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
|
PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
|
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
|
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
|
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
|
PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
|
PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
|
PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
|
PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
|
PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
|
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
|
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
|
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
|
PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
|
PCMCIA_DEVICE_NULL,
|
};
|
MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
|
|
static struct pcmcia_driver axnet_cs_driver = {
|
.owner = THIS_MODULE,
|
.name = "axnet_cs",
|
.probe = axnet_probe,
|
.remove = axnet_detach,
|
.id_table = axnet_ids,
|
.suspend = axnet_suspend,
|
.resume = axnet_resume,
|
};
|
module_pcmcia_driver(axnet_cs_driver);
|
|
/*====================================================================*/
|
|
/* 8390.c: A general NS8390 ethernet driver core 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 General Public License, incorporated herein by reference.
|
|
The author may be reached as becker@scyld.com, or C/O
|
Scyld Computing Corporation
|
410 Severn Ave., Suite 210
|
Annapolis MD 21403
|
|
This is the chip-specific code for many 8390-based ethernet adaptors.
|
This is not a complete driver, it must be combined with board-specific
|
code such as ne.c, wd.c, 3c503.c, etc.
|
|
Seeing how at least eight drivers use this code, (not counting the
|
PCMCIA ones either) it is easy to break some card by what seems like
|
a simple innocent change. Please contact me or Donald if you think
|
you have found something that needs changing. -- PG
|
|
Changelog:
|
|
Paul Gortmaker : remove set_bit lock, other cleanups.
|
Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
|
ei_block_input() for eth_io_copy_and_sum().
|
Paul Gortmaker : exchange static int ei_pingpong for a #define,
|
also add better Tx error handling.
|
Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
|
Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
|
Paul Gortmaker : tweak ANK's above multicast changes a bit.
|
Paul Gortmaker : update packet statistics for v2.1.x
|
Alan Cox : support arbitrary stupid port mappings on the
|
68K Macintosh. Support >16bit I/O spaces
|
Paul Gortmaker : add kmod support for auto-loading of the 8390
|
module by all drivers that require it.
|
Alan Cox : Spinlocking work, added 'BUG_83C690'
|
Paul Gortmaker : Separate out Tx timeout code from Tx path.
|
|
Sources:
|
The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
|
|
*/
|
|
#include <linux/bitops.h>
|
#include <asm/irq.h>
|
#include <linux/fcntl.h>
|
#include <linux/in.h>
|
#include <linux/interrupt.h>
|
|
#define BUG_83C690
|
|
/* These are the operational function interfaces to board-specific
|
routines.
|
void reset_8390(struct net_device *dev)
|
Resets the board associated with DEV, including a hardware reset of
|
the 8390. This is only called when there is a transmit timeout, and
|
it is always followed by 8390_init().
|
void block_output(struct net_device *dev, int count, const unsigned char *buf,
|
int start_page)
|
Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
|
"page" value uses the 8390's 256-byte pages.
|
void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
|
Read the 4 byte, page aligned 8390 header. *If* there is a
|
subsequent read, it will be of the rest of the packet.
|
void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
|
Read COUNT bytes from the packet buffer into the skb data area. Start
|
reading from RING_OFFSET, the address as the 8390 sees it. This will always
|
follow the read of the 8390 header.
|
*/
|
#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)
|
|
/* Index to functions. */
|
static void ei_tx_intr(struct net_device *dev);
|
static void ei_tx_err(struct net_device *dev);
|
static void ei_receive(struct net_device *dev);
|
static void ei_rx_overrun(struct net_device *dev);
|
|
/* Routines generic to NS8390-based boards. */
|
static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
|
int start_page);
|
static void do_set_multicast_list(struct net_device *dev);
|
|
/*
|
* SMP and the 8390 setup.
|
*
|
* The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
|
* a page register that controls bank and packet buffer access. We guard
|
* this with ei_local->page_lock. Nobody should assume or set the page other
|
* than zero when the lock is not held. Lock holders must restore page 0
|
* before unlocking. Even pure readers must take the lock to protect in
|
* page 0.
|
*
|
* To make life difficult the chip can also be very slow. We therefore can't
|
* just use spinlocks. For the longer lockups we disable the irq the device
|
* sits on and hold the lock. We must hold the lock because there is a dual
|
* processor case other than interrupts (get stats/set multicast list in
|
* parallel with each other and transmit).
|
*
|
* Note: in theory we can just disable the irq on the card _but_ there is
|
* a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
|
* enter lock, take the queued irq. So we waddle instead of flying.
|
*
|
* Finally by special arrangement for the purpose of being generally
|
* annoying the transmit function is called bh atomic. That places
|
* restrictions on the user context callers as disable_irq won't save
|
* them.
|
*/
|
|
/**
|
* ax_open - Open/initialize the board.
|
* @dev: network device to initialize
|
*
|
* 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.
|
*/
|
static int ax_open(struct net_device *dev)
|
{
|
unsigned long flags;
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
/*
|
* Grab the page lock so we own the register set, then call
|
* the init function.
|
*/
|
|
spin_lock_irqsave(&ei_local->page_lock, flags);
|
AX88190_init(dev, 1);
|
/* Set the flag before we drop the lock, That way the IRQ arrives
|
after its set and we get no silly warnings */
|
netif_start_queue(dev);
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
ei_local->irqlock = 0;
|
return 0;
|
}
|
|
#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
|
|
/**
|
* ax_close - shut down network device
|
* @dev: network device to close
|
*
|
* Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
|
*/
|
static int ax_close(struct net_device *dev)
|
{
|
unsigned long flags;
|
|
/*
|
* Hold the page lock during close
|
*/
|
|
spin_lock_irqsave(&dev_lock(dev), flags);
|
AX88190_init(dev, 0);
|
spin_unlock_irqrestore(&dev_lock(dev), flags);
|
netif_stop_queue(dev);
|
return 0;
|
}
|
|
/**
|
* axnet_tx_timeout - handle transmit time out condition
|
* @dev: network device which has apparently fallen asleep
|
* @txqueue: unused
|
*
|
* Called by kernel when device never acknowledges a transmit has
|
* completed (or failed) - i.e. never posted a Tx related interrupt.
|
*/
|
|
static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue)
|
{
|
long e8390_base = dev->base_addr;
|
struct ei_device *ei_local = netdev_priv(dev);
|
int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
|
unsigned long flags;
|
|
dev->stats.tx_errors++;
|
|
spin_lock_irqsave(&ei_local->page_lock, flags);
|
txsr = inb(e8390_base+EN0_TSR);
|
isr = inb(e8390_base+EN0_ISR);
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
|
netdev_dbg(dev, "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
|
(txsr & ENTSR_ABT) ? "excess collisions." :
|
(isr) ? "lost interrupt?" : "cable problem?",
|
txsr, isr, tickssofar);
|
|
if (!isr && !dev->stats.tx_packets)
|
{
|
/* The 8390 probably hasn't gotten on the cable yet. */
|
ei_local->interface_num ^= 1; /* Try a different xcvr. */
|
}
|
|
/* Ugly but a reset can be slow, yet must be protected */
|
|
spin_lock_irqsave(&ei_local->page_lock, flags);
|
|
/* Try to restart the card. Perhaps the user has fixed something. */
|
ei_reset_8390(dev);
|
AX88190_init(dev, 1);
|
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
netif_wake_queue(dev);
|
}
|
|
/**
|
* axnet_start_xmit - begin packet transmission
|
* @skb: packet to be sent
|
* @dev: network device to which packet is sent
|
*
|
* Sends a packet to an 8390 network device.
|
*/
|
|
static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
|
struct net_device *dev)
|
{
|
long e8390_base = dev->base_addr;
|
struct ei_device *ei_local = netdev_priv(dev);
|
int length, send_length, output_page;
|
unsigned long flags;
|
u8 packet[ETH_ZLEN];
|
|
netif_stop_queue(dev);
|
|
length = skb->len;
|
|
/* Mask interrupts from the ethercard.
|
SMP: We have to grab the lock here otherwise the IRQ handler
|
on another CPU can flip window and race the IRQ mask set. We end
|
up trashing the mcast filter not disabling irqs if we don't lock */
|
|
spin_lock_irqsave(&ei_local->page_lock, flags);
|
outb_p(0x00, e8390_base + EN0_IMR);
|
|
/*
|
* Slow phase with lock held.
|
*/
|
|
ei_local->irqlock = 1;
|
|
send_length = max(length, ETH_ZLEN);
|
|
/*
|
* 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 ((netif_msg_tx_queued(ei_local)) &&
|
ei_local->tx2 > 0)
|
netdev_dbg(dev,
|
"idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
|
ei_local->tx2, ei_local->lasttx,
|
ei_local->txing);
|
}
|
else if (ei_local->tx2 == 0)
|
{
|
output_page = ei_local->tx_start_page + TX_PAGES/2;
|
ei_local->tx2 = send_length;
|
if ((netif_msg_tx_queued(ei_local)) &&
|
ei_local->tx1 > 0)
|
netdev_dbg(dev,
|
"idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
|
ei_local->tx1, ei_local->lasttx,
|
ei_local->txing);
|
}
|
else
|
{ /* We should never get here. */
|
netif_dbg(ei_local, tx_err, dev,
|
"No Tx buffers free! tx1=%d tx2=%d last=%d\n",
|
ei_local->tx1, ei_local->tx2,
|
ei_local->lasttx);
|
ei_local->irqlock = 0;
|
netif_stop_queue(dev);
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
dev->stats.tx_errors++;
|
return NETDEV_TX_BUSY;
|
}
|
|
/*
|
* 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.
|
*/
|
|
if (length == skb->len)
|
ei_block_output(dev, length, skb->data, output_page);
|
else {
|
memset(packet, 0, ETH_ZLEN);
|
skb_copy_from_linear_data(skb, packet, skb->len);
|
ei_block_output(dev, length, packet, output_page);
|
}
|
|
if (! ei_local->txing)
|
{
|
ei_local->txing = 1;
|
NS8390_trigger_send(dev, send_length, output_page);
|
netif_trans_update(dev);
|
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++;
|
|
if (ei_local->tx1 && ei_local->tx2)
|
netif_stop_queue(dev);
|
else
|
netif_start_queue(dev);
|
|
/* Turn 8390 interrupts back on. */
|
ei_local->irqlock = 0;
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
|
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
|
dev_kfree_skb (skb);
|
dev->stats.tx_bytes += send_length;
|
|
return NETDEV_TX_OK;
|
}
|
|
/**
|
* ax_interrupt - handle the interrupts from an 8390
|
* @irq: interrupt number
|
* @dev_id: a pointer to the net_device
|
*
|
* Handle the ether interface interrupts. We pull packets from
|
* the 8390 via the card specific functions and fire them at the networking
|
* stack. We also handle transmit completions and wake the transmit path if
|
* necessary. We also update the counters and do other housekeeping as
|
* needed.
|
*/
|
|
static irqreturn_t ax_interrupt(int irq, void *dev_id)
|
{
|
struct net_device *dev = dev_id;
|
long e8390_base;
|
int interrupts, nr_serviced = 0, i;
|
struct ei_device *ei_local;
|
int handled = 0;
|
unsigned long flags;
|
|
e8390_base = dev->base_addr;
|
ei_local = netdev_priv(dev);
|
|
/*
|
* Protect the irq test too.
|
*/
|
|
spin_lock_irqsave(&ei_local->page_lock, flags);
|
|
if (ei_local->irqlock) {
|
#if 1 /* This might just be an interrupt for a PCI device sharing this line */
|
const char *msg;
|
/* The "irqlock" check is only for testing. */
|
if (ei_local->irqlock)
|
msg = "Interrupted while interrupts are masked!";
|
else
|
msg = "Reentering the interrupt handler!";
|
netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
|
msg,
|
inb_p(e8390_base + EN0_ISR),
|
inb_p(e8390_base + EN0_IMR));
|
#endif
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
return IRQ_NONE;
|
}
|
|
netif_dbg(ei_local, intr, dev, "interrupt(isr=%#2.2x)\n",
|
inb_p(e8390_base + EN0_ISR));
|
|
outb_p(0x00, e8390_base + EN0_ISR);
|
ei_local->irqlock = 1;
|
|
/* !!Assumption!! -- we stay in page 0. Don't break this. */
|
while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
|
++nr_serviced < MAX_SERVICE)
|
{
|
if (!netif_running(dev) || (interrupts == 0xff)) {
|
netif_warn(ei_local, intr, dev,
|
"interrupt from stopped card\n");
|
outb_p(interrupts, e8390_base + EN0_ISR);
|
interrupts = 0;
|
break;
|
}
|
handled = 1;
|
|
/* AX88190 bug fix. */
|
outb_p(interrupts, e8390_base + EN0_ISR);
|
for (i = 0; i < 10; i++) {
|
if (!(inb(e8390_base + EN0_ISR) & interrupts))
|
break;
|
outb_p(0, e8390_base + EN0_ISR);
|
outb_p(interrupts, e8390_base + EN0_ISR);
|
}
|
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)
|
{
|
dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
|
dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
|
dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
|
}
|
}
|
|
if (interrupts && (netif_msg_intr(ei_local)))
|
{
|
handled = 1;
|
if (nr_serviced >= MAX_SERVICE)
|
{
|
/* 0xFF is valid for a card removal */
|
if (interrupts != 0xFF)
|
netdev_warn(dev,
|
"Too much work at interrupt, status %#2.2x\n",
|
interrupts);
|
outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
|
} else {
|
netdev_warn(dev, "unknown interrupt %#2x\n",
|
interrupts);
|
outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
|
}
|
}
|
|
/* Turn 8390 interrupts back on. */
|
ei_local->irqlock = 0;
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
|
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
return IRQ_RETVAL(handled);
|
}
|
|
/**
|
* ei_tx_err - handle transmitter error
|
* @dev: network device which threw the exception
|
*
|
* 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.
|
*
|
* Called with lock held.
|
*/
|
|
static void ei_tx_err(struct net_device *dev)
|
{
|
long e8390_base = dev->base_addr;
|
unsigned char txsr = inb_p(e8390_base+EN0_TSR);
|
unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
|
|
#ifdef VERBOSE_ERROR_DUMP
|
netdev_dbg(dev, "transmitter error (%#2x):", txsr);
|
if (txsr & ENTSR_ABT)
|
pr_cont(" excess-collisions");
|
if (txsr & ENTSR_ND)
|
pr_cont(" non-deferral");
|
if (txsr & ENTSR_CRS)
|
pr_cont(" lost-carrier");
|
if (txsr & ENTSR_FU)
|
pr_cont(" FIFO-underrun");
|
if (txsr & ENTSR_CDH)
|
pr_cont(" lost-heartbeat");
|
pr_cont("\n");
|
#endif
|
|
if (tx_was_aborted)
|
ei_tx_intr(dev);
|
else
|
{
|
dev->stats.tx_errors++;
|
if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
|
if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
|
if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
|
}
|
}
|
|
/**
|
* ei_tx_intr - transmit interrupt handler
|
* @dev: network device for which tx intr is handled
|
*
|
* We have finished a transmit: check for errors and then trigger the next
|
* packet to be sent. Called with lock held.
|
*/
|
|
static void ei_tx_intr(struct net_device *dev)
|
{
|
long e8390_base = dev->base_addr;
|
struct ei_device *ei_local = netdev_priv(dev);
|
int status = inb(e8390_base + EN0_TSR);
|
|
/*
|
* 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)
|
netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
|
ei_local->name, ei_local->lasttx,
|
ei_local->tx1);
|
ei_local->tx1 = 0;
|
if (ei_local->tx2 > 0)
|
{
|
ei_local->txing = 1;
|
NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
|
netif_trans_update(dev);
|
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)
|
netdev_err(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
|
ei_local->name, ei_local->lasttx,
|
ei_local->tx2);
|
ei_local->tx2 = 0;
|
if (ei_local->tx1 > 0)
|
{
|
ei_local->txing = 1;
|
NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
|
netif_trans_update(dev);
|
ei_local->tx1 = -1;
|
ei_local->lasttx = 1;
|
} else {
|
ei_local->lasttx = 10;
|
ei_local->txing = 0;
|
}
|
}
|
// else
|
// netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
|
// ei_local->lasttx);
|
|
/* Minimize Tx latency: update the statistics after we restart TXing. */
|
if (status & ENTSR_COL)
|
dev->stats.collisions++;
|
if (status & ENTSR_PTX)
|
dev->stats.tx_packets++;
|
else
|
{
|
dev->stats.tx_errors++;
|
if (status & ENTSR_ABT)
|
{
|
dev->stats.tx_aborted_errors++;
|
dev->stats.collisions += 16;
|
}
|
if (status & ENTSR_CRS)
|
dev->stats.tx_carrier_errors++;
|
if (status & ENTSR_FU)
|
dev->stats.tx_fifo_errors++;
|
if (status & ENTSR_CDH)
|
dev->stats.tx_heartbeat_errors++;
|
if (status & ENTSR_OWC)
|
dev->stats.tx_window_errors++;
|
}
|
netif_wake_queue(dev);
|
}
|
|
/**
|
* ei_receive - receive some packets
|
* @dev: network device with which receive will be run
|
*
|
* We have a good packet(s), get it/them out of the buffers.
|
* Called with lock held.
|
*/
|
|
static void ei_receive(struct net_device *dev)
|
{
|
long e8390_base = dev->base_addr;
|
struct ei_device *ei_local = netdev_priv(dev);
|
unsigned char rxing_page, this_frame, next_frame;
|
unsigned short current_offset;
|
int rx_pkt_count = 0;
|
struct e8390_pkt_hdr rx_frame;
|
|
while (++rx_pkt_count < 10)
|
{
|
int pkt_len, pkt_stat;
|
|
/* Get the rx page (incoming packet pointer). */
|
rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
|
|
/* 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.)
|
|
Keep quiet if it looks like a card removal. One problem here
|
is that some clones crash in roughly the same way.
|
*/
|
if ((netif_msg_rx_err(ei_local)) &&
|
this_frame != ei_local->current_page &&
|
(this_frame != 0x0 || rxing_page != 0xFF))
|
netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
|
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);
|
pkt_stat = rx_frame.status;
|
|
next_frame = this_frame + 1 + ((pkt_len+4)>>8);
|
|
if (pkt_len < 60 || pkt_len > 1518)
|
{
|
netif_err(ei_local, rx_err, dev,
|
"bogus packet size: %d, status=%#2x nxpg=%#2x\n",
|
rx_frame.count, rx_frame.status,
|
rx_frame.next);
|
dev->stats.rx_errors++;
|
dev->stats.rx_length_errors++;
|
}
|
else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
|
{
|
struct sk_buff *skb;
|
|
skb = netdev_alloc_skb(dev, pkt_len + 2);
|
if (skb == NULL)
|
{
|
netif_err(ei_local, rx_err, dev,
|
"Couldn't allocate a sk_buff of size %d\n",
|
pkt_len);
|
dev->stats.rx_dropped++;
|
break;
|
}
|
else
|
{
|
skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
|
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);
|
dev->stats.rx_packets++;
|
dev->stats.rx_bytes += pkt_len;
|
if (pkt_stat & ENRSR_PHY)
|
dev->stats.multicast++;
|
}
|
}
|
else
|
{
|
netif_err(ei_local, rx_err, dev,
|
"bogus packet: status=%#2x nxpg=%#2x size=%d\n",
|
rx_frame.status, rx_frame.next,
|
rx_frame.count);
|
dev->stats.rx_errors++;
|
/* NB: The NIC counts CRC, frame and missed errors. */
|
if (pkt_stat & ENRSR_FO)
|
dev->stats.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) {
|
netdev_info(dev, "next frame inconsistency, %#2x\n",
|
next_frame);
|
next_frame = ei_local->rx_start_page;
|
}
|
ei_local->current_page = next_frame;
|
outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
|
}
|
}
|
|
/**
|
* ei_rx_overrun - handle receiver overrun
|
* @dev: network device which threw exception
|
*
|
* 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.
|
* Called with lock held. Don't call this with the interrupts off or your
|
* computer will hate you - it takes 10ms or so.
|
*/
|
|
static void ei_rx_overrun(struct net_device *dev)
|
{
|
struct axnet_dev *info = PRIV(dev);
|
long e8390_base = dev->base_addr;
|
unsigned char was_txing, must_resend = 0;
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
/*
|
* 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);
|
|
netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n");
|
dev->stats.rx_over_errors++;
|
|
/*
|
* Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
|
* We wait at least 2ms.
|
*/
|
|
mdelay(2);
|
|
/*
|
* 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);
|
|
/*
|
* Leave loopback mode, and resend any packet that got stopped.
|
*/
|
outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
|
if (must_resend)
|
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
|
}
|
|
/*
|
* Collect the stats. This is called unlocked and from several contexts.
|
*/
|
|
static struct net_device_stats *get_stats(struct net_device *dev)
|
{
|
long ioaddr = dev->base_addr;
|
struct ei_device *ei_local = netdev_priv(dev);
|
unsigned long flags;
|
|
/* If the card is stopped, just return the present stats. */
|
if (!netif_running(dev))
|
return &dev->stats;
|
|
spin_lock_irqsave(&ei_local->page_lock,flags);
|
/* Read the counter registers, assuming we are in page 0. */
|
dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
|
dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
|
dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
|
spin_unlock_irqrestore(&ei_local->page_lock, flags);
|
|
return &dev->stats;
|
}
|
|
/*
|
* Form the 64 bit 8390 multicast table from the linked list of addresses
|
* associated with this dev structure.
|
*/
|
|
static inline void make_mc_bits(u8 *bits, struct net_device *dev)
|
{
|
struct netdev_hw_addr *ha;
|
u32 crc;
|
|
netdev_for_each_mc_addr(ha, dev) {
|
crc = ether_crc(ETH_ALEN, ha->addr);
|
/*
|
* The 8390 uses the 6 most significant bits of the
|
* CRC to index the multicast table.
|
*/
|
bits[crc>>29] |= (1<<((crc>>26)&7));
|
}
|
}
|
|
/**
|
* do_set_multicast_list - set/clear multicast filter
|
* @dev: net device for which multicast filter is adjusted
|
*
|
* Set or clear the multicast filter for this adaptor.
|
* Must be called with lock held.
|
*/
|
|
static void do_set_multicast_list(struct net_device *dev)
|
{
|
long e8390_base = dev->base_addr;
|
int i;
|
struct ei_device *ei_local = netdev_priv(dev);
|
|
if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
|
memset(ei_local->mcfilter, 0, 8);
|
if (!netdev_mc_empty(dev))
|
make_mc_bits(ei_local->mcfilter, dev);
|
} else {
|
/* set to accept-all */
|
memset(ei_local->mcfilter, 0xFF, 8);
|
}
|
|
outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
|
for(i = 0; i < 8; i++)
|
{
|
outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
|
}
|
outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
|
|
if(dev->flags&IFF_PROMISC)
|
outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
|
else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
|
outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
|
else
|
outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
|
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
|
}
|
|
/*
|
* Called without lock held. This is invoked from user context and may
|
* be parallel to just about everything else. Its also fairly quick and
|
* not called too often. Must protect against both bh and irq users
|
*/
|
|
static void set_multicast_list(struct net_device *dev)
|
{
|
unsigned long flags;
|
|
spin_lock_irqsave(&dev_lock(dev), flags);
|
do_set_multicast_list(dev);
|
spin_unlock_irqrestore(&dev_lock(dev), flags);
|
}
|
|
/* This page of functions should be 8390 generic */
|
/* Follow National Semi's recommendations for initializing the "NIC". */
|
|
/**
|
* AX88190_init - initialize 8390 hardware
|
* @dev: network device to initialize
|
* @startp: boolean. non-zero value to initiate chip processing
|
*
|
* Must be called with lock held.
|
*/
|
|
static void AX88190_init(struct net_device *dev, int startp)
|
{
|
struct axnet_dev *info = PRIV(dev);
|
long e8390_base = dev->base_addr;
|
struct ei_device *ei_local = netdev_priv(dev);
|
int i;
|
int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
|
|
if(sizeof(struct e8390_pkt_hdr)!=4)
|
panic("8390.c: header struct mispacked\n");
|
/* Follow National Semi's recommendations for initing the DP83902. */
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 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|0x40, e8390_base + EN0_RXCR); /* 0x60 */
|
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. */
|
|
outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
|
for(i = 0; i < 6; i++)
|
{
|
outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
|
if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
|
netdev_err(dev, "Hw. address read/write mismap %d\n", i);
|
}
|
|
outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
|
|
netif_start_queue(dev);
|
ei_local->tx1 = ei_local->tx2 = 0;
|
ei_local->txing = 0;
|
|
if (info->flags & IS_AX88790) /* select Internal PHY */
|
outb(0x10, e8390_base + AXNET_GPIO);
|
|
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+E8390_CMD);
|
outb_p(E8390_TXCONFIG | info->duplex_flag,
|
e8390_base + EN0_TXCR); /* xmit on. */
|
/* 3c503 TechMan says rxconfig only after the NIC is started. */
|
outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
|
do_set_multicast_list(dev); /* (re)load the mcast table */
|
}
|
}
|
|
/* Trigger a transmit start, assuming the length is valid.
|
Always called with the page lock held */
|
|
static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
|
int start_page)
|
{
|
long e8390_base = dev->base_addr;
|
struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
|
|
if (inb_p(e8390_base) & E8390_TRANS)
|
{
|
netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
|
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+E8390_CMD);
|
}
|
