Linux-2.6.12-rc2v2.6.12-rc2

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

Let it rip!

1 files changed, 862 insertions, 0 deletions

diff --git a/drivers/net/ne.c b/drivers/net/ne.c
new file mode 100644
index 000000000000..496433902ade
--- /dev/null
+++ b/drivers/net/ne.c
@@ -0,0 +1,862 @@
+/* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
+/*
+    Written 1992-94 by Donald Becker.
+
+    Copyright 1993 United States Government as represented by the
+    Director, National Security Agency.
+
+    This software may be used and distributed according to the terms
+    of the GNU 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 driver should work with many programmed-I/O 8390-based ethernet
+    boards.  Currently it supports the NE1000, NE2000, many clones,
+    and some Cabletron products.
+
+    Changelog:
+
+    Paul Gortmaker      : use ENISR_RDC to monitor Tx PIO uploads, made
+                          sanity checks and bad clone support optional.
+    Paul Gortmaker      : new reset code, reset card after probe at boot.
+    Paul Gortmaker      : multiple card support for module users.
+    Paul Gortmaker      : Support for PCI ne2k clones, similar to lance.c
+    Paul Gortmaker      : Allow users with bad cards to avoid full probe.
+    Paul Gortmaker      : PCI probe changes, more PCI cards supported.
+    rjohnson@analogic.com : Changed init order so an interrupt will only
+    occur after memory is allocated for dev->priv. Deallocated memory
+    last in cleanup_modue()
+    Richard Guenther    : Added support for ISAPnP cards
+    Paul Gortmaker      : Discontinued PCI support - use ne2k-pci.c instead.
+    Hayato Fujiwara     : Add m32r support.
+
+*/
+
+/* Routines for the NatSemi-based designs (NE[12]000). */
+
+static const char version1[] =
+"ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
+static const char version2[] =
+"Last modified Nov 1, 2000 by Paul Gortmaker\n";
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/isapnp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+
+#include "8390.h"
+
+#define DRV_NAME "ne"
+
+/* Some defines that people can play with if so inclined. */
+
+/* Do we support clones that don't adhere to 14,15 of the SAprom ? */
+#define SUPPORT_NE_BAD_CLONES
+
+/* Do we perform extra sanity checks on stuff ? */
+/* #define NE_SANITY_CHECK */
+
+/* Do we implement the read before write bugfix ? */
+/* #define NE_RW_BUGFIX */
+
+/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
+/* #define PACKETBUF_MEMSIZE    0x40 */
+
+/* A zero-terminated list of I/O addresses to be probed at boot. */
+#ifndef MODULE
+static unsigned int netcard_portlist[] __initdata = {
+        0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
+};
+#endif
+
+static struct isapnp_device_id isapnp_clone_list[] __initdata = {
+        {       ISAPNP_CARD_ID('A','X','E',0x2011),
+                ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
+                (long) "NetGear EA201" },
+        {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+                ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
+                (long) "NN NE2000" },
+        {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+                ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
+                (long) "Generic PNP" },
+        { }     /* terminate list */
+};
+
+MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
+
+#ifdef SUPPORT_NE_BAD_CLONES
+/* A list of bad clones that we none-the-less recognize. */
+static struct { const char *name8, *name16; unsigned char SAprefix[4];}
+bad_clone_list[] __initdata = {
+    {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
+    {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
+    {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh?  */
+    {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
+    {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
+    {"NN1000", "NN2000",  {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
+    {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}},  /* Outlaw 4-Dimension cards. */
+    {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
+    {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
+    {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
+    {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
+    {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
+    {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
+    {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
+    {NULL,}
+};
+#endif
+
+/* ---- No user-serviceable parts below ---- */
+
+#define NE_BASE  (dev->base_addr)
+#define NE_CMD          0x00
+#define NE_DATAPORT     0x10    /* NatSemi-defined port window offset. */
+#define NE_RESET        0x1f    /* Issue a read to reset, a write to clear. */
+#define NE_IO_EXTENT    0x20
+
+#define NE1SM_START_PG  0x20    /* First page of TX buffer */
+#define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
+#define NESM_START_PG   0x40    /* First page of TX buffer */
+#define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
+
+#ifdef CONFIG_PLAT_MAPPI
+#  define DCR_VAL 0x4b
+#elif CONFIG_PLAT_OAKS32R
+#  define DCR_VAL 0x48
+#else
+#  define DCR_VAL 0x49
+#endif
+
+static int ne_probe1(struct net_device *dev, int ioaddr);
+static int ne_probe_isapnp(struct net_device *dev);
+
+static int ne_open(struct net_device *dev);
+static int ne_close(struct net_device *dev);
+
+static void ne_reset_8390(struct net_device *dev);
+static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+                          int ring_page);
+static void ne_block_input(struct net_device *dev, int count,
+                          struct sk_buff *skb, int ring_offset);
+static void ne_block_output(struct net_device *dev, const int count,
+                const unsigned char *buf, const int start_page);
+
+
+/*  Probe for various non-shared-memory ethercards.
+
+   NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
+   buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
+   the SAPROM, while other supposed NE2000 clones must be detected by their
+   SA prefix.
+
+   Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
+   mode results in doubled values, which can be detected and compensated for.
+
+   The probe is also responsible for initializing the card and filling
+   in the 'dev' and 'ei_status' structures.
+
+   We use the minimum memory size for some ethercard product lines, iff we can't
+   distinguish models.  You can increase the packet buffer size by setting
+   PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
+        E1010   starts at 0x100 and ends at 0x2000.
+        E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
+        E2010    starts at 0x100 and ends at 0x4000.
+        E2010-x starts at 0x100 and ends at 0xffff.  */
+
+static int __init do_ne_probe(struct net_device *dev)
+{
+        unsigned int base_addr = dev->base_addr;
+#ifndef MODULE
+        int orig_irq = dev->irq;
+#endif
+
+        SET_MODULE_OWNER(dev);
+
+        /* First check any supplied i/o locations. User knows best. <cough> */
+        if (base_addr > 0x1ff)  /* Check a single specified location. */
+                return ne_probe1(dev, base_addr);
+        else if (base_addr != 0)        /* Don't probe at all. */
+                return -ENXIO;
+
+        /* Then look for any installed ISAPnP clones */
+        if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
+                return 0;
+
+#ifndef MODULE
+        /* Last resort. The semi-risky ISA auto-probe. */
+        for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
+                int ioaddr = netcard_portlist[base_addr];
+                dev->irq = orig_irq;
+                if (ne_probe1(dev, ioaddr) == 0)
+                        return 0;
+        }
+#endif
+
+        return -ENODEV;
+}
+
+static void cleanup_card(struct net_device *dev)
+{
+        struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
+        if (idev)
+                pnp_device_detach(idev);
+        free_irq(dev->irq, dev);
+        release_region(dev->base_addr, NE_IO_EXTENT);
+}
+
+#ifndef MODULE
+struct net_device * __init ne_probe(int unit)
+{
+        struct net_device *dev = alloc_ei_netdev();
+        int err;
+
+        if (!dev)
+                return ERR_PTR(-ENOMEM);
+
+        sprintf(dev->name, "eth%d", unit);
+        netdev_boot_setup_check(dev);
+
+        err = do_ne_probe(dev);
+        if (err)
+                goto out;
+        err = register_netdev(dev);
+        if (err)
+                goto out1;
+        return dev;
+out1:
+        cleanup_card(dev);
+out:
+        free_netdev(dev);
+        return ERR_PTR(err);
+}
+#endif
+
+static int __init ne_probe_isapnp(struct net_device *dev)
+{
+        int i;
+
+        for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
+                struct pnp_dev *idev = NULL;
+
+                while ((idev = pnp_find_dev(NULL,
+                                            isapnp_clone_list[i].vendor,
+                                            isapnp_clone_list[i].function,
+                                            idev))) {
+                        /* Avoid already found cards from previous calls */
+                        if (pnp_device_attach(idev) < 0)
+                                continue;
+                        if (pnp_activate_dev(idev) < 0) {
+                                pnp_device_detach(idev);
+                                continue;
+                        }
+                        /* if no io and irq, search for next */
+                        if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
+                                pnp_device_detach(idev);
+                                continue;
+                        }
+                        /* found it */
+                        dev->base_addr = pnp_port_start(idev, 0);
+                        dev->irq = pnp_irq(idev, 0);
+                        printk(KERN_INFO "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
+                                (char *) isapnp_clone_list[i].driver_data,
+                                dev->base_addr, dev->irq);
+                        if (ne_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
+                                printk(KERN_ERR "ne.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
+                                pnp_device_detach(idev);
+                                return -ENXIO;
+                        }
+                        ei_status.priv = (unsigned long)idev;
+                        break;
+                }
+                if (!idev)
+                        continue;
+                return 0;
+        }
+
+        return -ENODEV;
+}
+
+static int __init ne_probe1(struct net_device *dev, int ioaddr)
+{
+        int i;
+        unsigned char SA_prom[32];
+        int wordlength = 2;
+        const char *name = NULL;
+        int start_page, stop_page;
+        int neX000, ctron, copam, bad_card;
+        int reg0, ret;
+        static unsigned version_printed;
+
+        if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
+                return -EBUSY;
+
+        reg0 = inb_p(ioaddr);
+        if (reg0 == 0xFF) {
+                ret = -ENODEV;
+                goto err_out;
+        }
+
+        /* Do a preliminary verification that we have a 8390. */
+        {
+                int regd;
+                outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
+                regd = inb_p(ioaddr + 0x0d);
+                outb_p(0xff, ioaddr + 0x0d);
+                outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
+                inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
+                if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
+                        outb_p(reg0, ioaddr);
+                        outb_p(regd, ioaddr + 0x0d);    /* Restore the old values. */
+                        ret = -ENODEV;
+                        goto err_out;
+                }
+        }
+
+        if (ei_debug  &&  version_printed++ == 0)
+                printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
+
+        printk(KERN_INFO "NE*000 ethercard probe at %#3x:", ioaddr);
+
+        /* A user with a poor card that fails to ack the reset, or that
+           does not have a valid 0x57,0x57 signature can still use this
+           without having to recompile. Specifying an i/o address along
+           with an otherwise unused dev->mem_end value of "0xBAD" will
+           cause the driver to skip these parts of the probe. */
+
+        bad_card = ((dev->base_addr != 0) && (dev->mem_end == 0xbad));
+
+        /* Reset card. Who knows what dain-bramaged state it was left in. */
+
+        {
+                unsigned long reset_start_time = jiffies;
+
+                /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
+                outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
+
+                while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
+                if (jiffies - reset_start_time > 2*HZ/100) {
+                        if (bad_card) {
+                                printk(" (warning: no reset ack)");
+                                break;
+                        } else {
+                                printk(" not found (no reset ack).\n");
+                                ret = -ENODEV;
+                                goto err_out;
+                        }
+                }
+
+                outb_p(0xff, ioaddr + EN0_ISR);         /* Ack all intr. */
+        }
+
+        /* Read the 16 bytes of station address PROM.
+           We must first initialize registers, similar to NS8390_init(eifdev, 0).
+           We can't reliably read the SAPROM address without this.
+           (I learned the hard way!). */
+        {
+                struct {unsigned char value, offset; } program_seq[] =
+                {
+                        {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
+                        {0x48,  EN0_DCFG},      /* Set byte-wide (0x48) access. */
+                        {0x00,  EN0_RCNTLO},    /* Clear the count regs. */
+                        {0x00,  EN0_RCNTHI},
+                        {0x00,  EN0_IMR},       /* Mask completion irq. */
+                        {0xFF,  EN0_ISR},
+                        {E8390_RXOFF, EN0_RXCR},        /* 0x20  Set to monitor */
+                        {E8390_TXOFF, EN0_TXCR},        /* 0x02  and loopback mode. */
+                        {32,    EN0_RCNTLO},
+                        {0x00,  EN0_RCNTHI},
+                        {0x00,  EN0_RSARLO},    /* DMA starting at 0x0000. */
+                        {0x00,  EN0_RSARHI},
+                        {E8390_RREAD+E8390_START, E8390_CMD},
+                };
+
+                for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
+                        outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
+
+        }
+        for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
+                SA_prom[i] = inb(ioaddr + NE_DATAPORT);
+                SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
+                if (SA_prom[i] != SA_prom[i+1])
+                        wordlength = 1;
+        }
+
+        if (wordlength == 2)
+        {
+                for (i = 0; i < 16; i++)
+                        SA_prom[i] = SA_prom[i+i];
+                /* We must set the 8390 for word mode. */
+                outb_p(DCR_VAL, ioaddr + EN0_DCFG);
+                start_page = NESM_START_PG;
+                stop_page = NESM_STOP_PG;
+        } else {
+                start_page = NE1SM_START_PG;
+                stop_page = NE1SM_STOP_PG;
+        }
+
+#if  defined(CONFIG_PLAT_MAPPI) || defined(CONFIG_PLAT_OAKS32R)
+        neX000 = ((SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57)
+                || (SA_prom[14] == 0x42 && SA_prom[15] == 0x42));
+#else
+        neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
+#endif
+        ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
+        copam =  (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
+
+        /* Set up the rest of the parameters. */
+        if (neX000 || bad_card || copam) {
+                name = (wordlength == 2) ? "NE2000" : "NE1000";
+        }
+        else if (ctron)
+        {
+                name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
+                start_page = 0x01;
+                stop_page = (wordlength == 2) ? 0x40 : 0x20;
+        }
+        else
+        {
+#ifdef SUPPORT_NE_BAD_CLONES
+                /* Ack!  Well, there might be a *bad* NE*000 clone there.
+                   Check for total bogus addresses. */
+                for (i = 0; bad_clone_list[i].name8; i++)
+                {
+                        if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
+                                SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
+                                SA_prom[2] == bad_clone_list[i].SAprefix[2])
+                        {
+                                if (wordlength == 2)
+                                {
+                                        name = bad_clone_list[i].name16;
+                                } else {
+                                        name = bad_clone_list[i].name8;
+                                }
+                                break;
+                        }
+                }
+                if (bad_clone_list[i].name8 == NULL)
+                {
+                        printk(" not found (invalid signature %2.2x %2.2x).\n",
+                                SA_prom[14], SA_prom[15]);
+                        ret = -ENXIO;
+                        goto err_out;
+                }
+#else
+                printk(" not found.\n");
+                ret = -ENXIO;
+                goto err_out;
+#endif
+        }
+
+        if (dev->irq < 2)
+        {
+                unsigned long cookie = probe_irq_on();
+                outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
+                outb_p(0x00, ioaddr + EN0_RCNTLO);
+                outb_p(0x00, ioaddr + EN0_RCNTHI);
+                outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
+                mdelay(10);             /* wait 10ms for interrupt to propagate */
+                outb_p(0x00, ioaddr + EN0_IMR);                 /* Mask it again. */
+                dev->irq = probe_irq_off(cookie);
+                if (ei_debug > 2)
+                        printk(" autoirq is %d\n", dev->irq);
+        } else if (dev->irq == 2)
+                /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
+                   or don't know which one to set. */
+                dev->irq = 9;
+
+        if (! dev->irq) {
+                printk(" failed to detect IRQ line.\n");
+                ret = -EAGAIN;
+                goto err_out;
+        }
+
+        /* Snarf the interrupt now.  There's no point in waiting since we cannot
+           share and the board will usually be enabled. */
+        ret = request_irq(dev->irq, ei_interrupt, 0, name, dev);
+        if (ret) {
+                printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
+                goto err_out;
+        }
+
+        dev->base_addr = ioaddr;
+
+#ifdef CONFIG_PLAT_MAPPI
+        outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
+                ioaddr + E8390_CMD); /* 0x61 */
+        for (i = 0 ; i < ETHER_ADDR_LEN ; i++) {
+                dev->dev_addr[i] = SA_prom[i]
+                        = inb_p(ioaddr + EN1_PHYS_SHIFT(i));
+                printk(" %2.2x", SA_prom[i]);
+        }
+#else
+        for(i = 0; i < ETHER_ADDR_LEN; i++) {
+                printk(" %2.2x", SA_prom[i]);
+                dev->dev_addr[i] = SA_prom[i];
+        }
+#endif
+
+        printk("\n%s: %s found at %#x, using IRQ %d.\n",
+                dev->name, name, ioaddr, dev->irq);
+
+        ei_status.name = name;
+        ei_status.tx_start_page = start_page;
+        ei_status.stop_page = stop_page;
+#ifdef CONFIG_PLAT_OAKS32R
+        ei_status.word16 = 0;
+#else
+        ei_status.word16 = (wordlength == 2);
+#endif
+
+        ei_status.rx_start_page = start_page + TX_PAGES;
+#ifdef PACKETBUF_MEMSIZE
+         /* Allow the packet buffer size to be overridden by know-it-alls. */
+        ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
+#endif
+
+        ei_status.reset_8390 = &ne_reset_8390;
+        ei_status.block_input = &ne_block_input;
+        ei_status.block_output = &ne_block_output;
+        ei_status.get_8390_hdr = &ne_get_8390_hdr;
+        ei_status.priv = 0;
+        dev->open = &ne_open;
+        dev->stop = &ne_close;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        dev->poll_controller = ei_poll;
+#endif
+        NS8390_init(dev, 0);
+        return 0;
+
+err_out:
+        release_region(ioaddr, NE_IO_EXTENT);
+        return ret;
+}
+
+static int ne_open(struct net_device *dev)
+{
+        ei_open(dev);
+        return 0;
+}
+
+static int ne_close(struct net_device *dev)
+{
+        if (ei_debug > 1)
+                printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
+        ei_close(dev);
+        return 0;
+}
+
+/* Hard reset the card.  This used to pause for the same period that a
+   8390 reset command required, but that shouldn't be necessary. */
+
+static void ne_reset_8390(struct net_device *dev)
+{
+        unsigned long reset_start_time = jiffies;
+
+        if (ei_debug > 1)
+                printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
+
+        /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
+        outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
+
+        ei_status.txing = 0;
+        ei_status.dmaing = 0;
+
+        /* This check _should_not_ be necessary, omit eventually. */
+        while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
+                if (jiffies - reset_start_time > 2*HZ/100) {
+                        printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
+                        break;
+                }
+        outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
+}
+
+/* Grab the 8390 specific header. Similar to the block_input routine, but
+   we don't need to be concerned with ring wrap as the header will be at
+   the start of a page, so we optimize accordingly. */
+
+static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
+{
+        int nic_base = dev->base_addr;
+
+        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
+
+        if (ei_status.dmaing)
+        {
+                printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
+                        "[DMAstat:%d][irqlock:%d].\n",
+                        dev->name, ei_status.dmaing, ei_status.irqlock);
+                return;
+        }
+
+        ei_status.dmaing |= 0x01;
+        outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
+        outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
+        outb_p(0, nic_base + EN0_RCNTHI);
+        outb_p(0, nic_base + EN0_RSARLO);               /* On page boundary */
+        outb_p(ring_page, nic_base + EN0_RSARHI);
+        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+
+        if (ei_status.word16)
+                insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
+        else
+                insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
+
+        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
+        ei_status.dmaing &= ~0x01;
+
+        le16_to_cpus(&hdr->count);
+}
+
+/* Block input and output, similar to the Crynwr packet driver.  If you
+   are porting to a new ethercard, look at the packet driver source for hints.
+   The NEx000 doesn't share the on-board packet memory -- you have to put
+   the packet out through the "remote DMA" dataport using outb. */
+
+static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
+{
+#ifdef NE_SANITY_CHECK
+        int xfer_count = count;
+#endif
+        int nic_base = dev->base_addr;
+        char *buf = skb->data;
+
+        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
+        if (ei_status.dmaing)
+        {
+                printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
+                        "[DMAstat:%d][irqlock:%d].\n",
+                        dev->name, ei_status.dmaing, ei_status.irqlock);
+                return;
+        }
+        ei_status.dmaing |= 0x01;
+        outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
+        outb_p(count & 0xff, nic_base + EN0_RCNTLO);
+        outb_p(count >> 8, nic_base + EN0_RCNTHI);
+        outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
+        outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
+        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+        if (ei_status.word16)
+        {
+                insw(NE_BASE + NE_DATAPORT,buf,count>>1);
+                if (count & 0x01)
+                {
+                        buf[count-1] = inb(NE_BASE + NE_DATAPORT);
+#ifdef NE_SANITY_CHECK
+                        xfer_count++;
+#endif
+                }
+        } else {
+                insb(NE_BASE + NE_DATAPORT, buf, count);
+        }
+
+#ifdef NE_SANITY_CHECK
+        /* This was for the ALPHA version only, but enough people have
+           been encountering problems so it is still here.  If you see
+           this message you either 1) have a slightly incompatible clone
+           or 2) have noise/speed problems with your bus. */
+
+        if (ei_debug > 1)
+        {
+                /* DMA termination address check... */
+                int addr, tries = 20;
+                do {
+                        /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
+                           -- it's broken for Rx on some cards! */
+                        int high = inb_p(nic_base + EN0_RSARHI);
+                        int low = inb_p(nic_base + EN0_RSARLO);
+                        addr = (high << 8) + low;
+                        if (((ring_offset + xfer_count) & 0xff) == low)
+                                break;
+                } while (--tries > 0);
+                if (tries <= 0)
+                        printk(KERN_WARNING "%s: RX transfer address mismatch,"
+                                "%#4.4x (expected) vs. %#4.4x (actual).\n",
+                                dev->name, ring_offset + xfer_count, addr);
+        }
+#endif
+        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
+        ei_status.dmaing &= ~0x01;
+}
+
+static void ne_block_output(struct net_device *dev, int count,
+                const unsigned char *buf, const int start_page)
+{
+        int nic_base = NE_BASE;
+        unsigned long dma_start;
+#ifdef NE_SANITY_CHECK
+        int retries = 0;
+#endif
+
+        /* Round the count up for word writes.  Do we need to do this?
+           What effect will an odd byte count have on the 8390?
+           I should check someday. */
+
+        if (ei_status.word16 && (count & 0x01))
+                count++;
+
+        /* This *shouldn't* happen. If it does, it's the last thing you'll see */
+        if (ei_status.dmaing)
+        {
+                printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
+                        "[DMAstat:%d][irqlock:%d]\n",
+                        dev->name, ei_status.dmaing, ei_status.irqlock);
+                return;
+        }
+        ei_status.dmaing |= 0x01;
+        /* We should already be in page 0, but to be safe... */
+        outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
+
+#ifdef NE_SANITY_CHECK
+retry:
+#endif
+
+#ifdef NE8390_RW_BUGFIX
+        /* Handle the read-before-write bug the same way as the
+           Crynwr packet driver -- the NatSemi method doesn't work.
+           Actually this doesn't always work either, but if you have
+           problems with your NEx000 this is better than nothing! */
+
+        outb_p(0x42, nic_base + EN0_RCNTLO);
+        outb_p(0x00,   nic_base + EN0_RCNTHI);
+        outb_p(0x42, nic_base + EN0_RSARLO);
+        outb_p(0x00, nic_base + EN0_RSARHI);
+        outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+        /* Make certain that the dummy read has occurred. */
+        udelay(6);
+#endif
+
+        outb_p(ENISR_RDC, nic_base + EN0_ISR);
+
+        /* Now the normal output. */
+        outb_p(count & 0xff, nic_base + EN0_RCNTLO);
+        outb_p(count >> 8,   nic_base + EN0_RCNTHI);
+        outb_p(0x00, nic_base + EN0_RSARLO);
+        outb_p(start_page, nic_base + EN0_RSARHI);
+
+        outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
+        if (ei_status.word16) {
+                outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
+        } else {
+                outsb(NE_BASE + NE_DATAPORT, buf, count);
+        }
+
+        dma_start = jiffies;
+
+#ifdef NE_SANITY_CHECK
+        /* This was for the ALPHA version only, but enough people have
+           been encountering problems so it is still here. */
+
+        if (ei_debug > 1)
+        {
+                /* DMA termination address check... */
+                int addr, tries = 20;
+                do {
+                        int high = inb_p(nic_base + EN0_RSARHI);
+                        int low = inb_p(nic_base + EN0_RSARLO);
+                        addr = (high << 8) + low;
+                        if ((start_page << 8) + count == addr)
+                                break;
+                } while (--tries > 0);
+
+                if (tries <= 0)
+                {
+                        printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
+                                "%#4.4x (expected) vs. %#4.4x (actual).\n",
+                                dev->name, (start_page << 8) + count, addr);
+                        if (retries++ == 0)
+                                goto retry;
+                }
+        }
+#endif
+
+        while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
+                if (jiffies - dma_start > 2*HZ/100) {           /* 20ms */
+                        printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
+                        ne_reset_8390(dev);
+                        NS8390_init(dev,1);
+                        break;
+                }
+
+        outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
+        ei_status.dmaing &= ~0x01;
+        return;
+}
+
+
+#ifdef MODULE
+#define MAX_NE_CARDS    4       /* Max number of NE cards per module */
+static struct net_device *dev_ne[MAX_NE_CARDS];
+static int io[MAX_NE_CARDS];
+static int irq[MAX_NE_CARDS];
+static int bad[MAX_NE_CARDS];   /* 0xbad = bad sig or no reset ack */
+
+module_param_array(io, int, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+module_param_array(bad, int, NULL, 0);
+MODULE_PARM_DESC(io, "I/O base address(es),required");
+MODULE_PARM_DESC(irq, "IRQ number(s)");
+MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
+MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
+MODULE_LICENSE("GPL");
+
+/* This is set up so that no ISA autoprobe takes place. We can't guarantee
+that the ne2k probe is the last 8390 based probe to take place (as it
+is at boot) and so the probe will get confused by any other 8390 cards.
+ISA device autoprobes on a running machine are not recommended anyway. */
+
+int init_module(void)
+{
+        int this_dev, found = 0;
+
+        for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
+                struct net_device *dev = alloc_ei_netdev();
+                if (!dev)
+                        break;
+                dev->irq = irq[this_dev];
+                dev->mem_end = bad[this_dev];
+                dev->base_addr = io[this_dev];
+                if (do_ne_probe(dev) == 0) {
+                        if (register_netdev(dev) == 0) {
+                                dev_ne[found++] = dev;
+                                continue;
+                        }
+                        cleanup_card(dev);
+                }
+                free_netdev(dev);
+                if (found)
+                        break;
+                if (io[this_dev] != 0)
+                        printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", io[this_dev]);
+                else
+                        printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n");
+                return -ENXIO;
+        }
+        if (found)
+                return 0;
+        return -ENODEV;
+}
+
+void cleanup_module(void)
+{
+        int this_dev;
+
+        for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
+                struct net_device *dev = dev_ne[this_dev];
+                if (dev) {
+                        unregister_netdev(dev);
+                        cleanup_card(dev);
+                        free_netdev(dev);
+                }
+        }
+}
+#endif /* MODULE */