--- /dev/null
+/* wd.c: A WD80x3 ethernet driver for linux. */
+/*
+ Written 1993-94 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 a driver for WD8003 and WD8013 "compatible" ethercards.
+
+ Thanks to Russ Nelson (nelson@crnwyr.com) for loaning me a WD8013.
+
+ Changelog:
+
+ Paul Gortmaker : multiple card support for module users, support
+ for non-standard memory sizes.
+
+
+*/
+
+static const char version[] =
+ "wd.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+
+#include <asm/io.h>
+
+#include "8390.h"
+
+#define DRV_NAME "wd"
+
+/* A zero-terminated list of I/O addresses to be probed. */
+static unsigned int wd_portlist[] __initdata =
+{0x300, 0x280, 0x380, 0x240, 0};
+
+static int wd_probe1(struct net_device *dev, int ioaddr);
+
+static int wd_open(struct net_device *dev);
+static void wd_reset_8390(struct net_device *dev);
+static void wd_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+ int ring_page);
+static void wd_block_input(struct net_device *dev, int count,
+ struct sk_buff *skb, int ring_offset);
+static void wd_block_output(struct net_device *dev, int count,
+ const unsigned char *buf, int start_page);
+static int wd_close(struct net_device *dev);
+
+static u32 wd_msg_enable;
+
+#define WD_START_PG 0x00 /* First page of TX buffer */
+#define WD03_STOP_PG 0x20 /* Last page +1 of RX ring */
+#define WD13_STOP_PG 0x40 /* Last page +1 of RX ring */
+
+#define WD_CMDREG 0 /* Offset to ASIC command register. */
+#define WD_RESET 0x80 /* Board reset, in WD_CMDREG. */
+#define WD_MEMENB 0x40 /* Enable the shared memory. */
+#define WD_CMDREG5 5 /* Offset to 16-bit-only ASIC register 5. */
+#define ISA16 0x80 /* Enable 16 bit access from the ISA bus. */
+#define NIC16 0x40 /* Enable 16 bit access from the 8390. */
+#define WD_NIC_OFFSET 16 /* Offset to the 8390 from the base_addr. */
+#define WD_IO_EXTENT 32
+
+
+/* Probe for the WD8003 and WD8013. These cards have the station
+ address PROM at I/O ports <base>+8 to <base>+13, with a checksum
+ following. A Soundblaster can have the same checksum as an WDethercard,
+ so we have an extra exclusionary check for it.
+
+ The wd_probe1() routine initializes the card and fills the
+ station address field. */
+
+static int __init do_wd_probe(struct net_device *dev)
+{
+ int i;
+ struct resource *r;
+ int base_addr = dev->base_addr;
+ int irq = dev->irq;
+ int mem_start = dev->mem_start;
+ int mem_end = dev->mem_end;
+
+ if (base_addr > 0x1ff) { /* Check a user specified location. */
+ r = request_region(base_addr, WD_IO_EXTENT, "wd-probe");
+ if ( r == NULL)
+ return -EBUSY;
+ i = wd_probe1(dev, base_addr);
+ if (i != 0)
+ release_region(base_addr, WD_IO_EXTENT);
+ else
+ r->name = dev->name;
+ return i;
+ }
+ else if (base_addr != 0) /* Don't probe at all. */
+ return -ENXIO;
+
+ for (i = 0; wd_portlist[i]; i++) {
+ int ioaddr = wd_portlist[i];
+ r = request_region(ioaddr, WD_IO_EXTENT, "wd-probe");
+ if (r == NULL)
+ continue;
+ if (wd_probe1(dev, ioaddr) == 0) {
+ r->name = dev->name;
+ return 0;
+ }
+ release_region(ioaddr, WD_IO_EXTENT);
+ dev->irq = irq;
+ dev->mem_start = mem_start;
+ dev->mem_end = mem_end;
+ }
+
+ return -ENODEV;
+}
+
+#ifndef MODULE
+struct net_device * __init wd_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_wd_probe(dev);
+ if (err)
+ goto out;
+ return dev;
+out:
+ free_netdev(dev);
+ return ERR_PTR(err);
+}
+#endif
+
+static const struct net_device_ops wd_netdev_ops = {
+ .ndo_open = wd_open,
+ .ndo_stop = wd_close,
+ .ndo_start_xmit = ei_start_xmit,
+ .ndo_tx_timeout = ei_tx_timeout,
+ .ndo_get_stats = ei_get_stats,
+ .ndo_set_rx_mode = ei_set_multicast_list,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_change_mtu = eth_change_mtu,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = ei_poll,
+#endif
+};
+
+static int __init wd_probe1(struct net_device *dev, int ioaddr)
+{
+ int i;
+ int err;
+ int checksum = 0;
+ int ancient = 0; /* An old card without config registers. */
+ int word16 = 0; /* 0 = 8 bit, 1 = 16 bit */
+ const char *model_name;
+ static unsigned version_printed;
+ struct ei_device *ei_local = netdev_priv(dev);
+
+ for (i = 0; i < 8; i++)
+ checksum += inb(ioaddr + 8 + i);
+ if (inb(ioaddr + 8) == 0xff /* Extra check to avoid soundcard. */
+ || inb(ioaddr + 9) == 0xff
+ || (checksum & 0xff) != 0xFF)
+ return -ENODEV;
+
+ /* Check for semi-valid mem_start/end values if supplied. */
+ if ((dev->mem_start % 0x2000) || (dev->mem_end % 0x2000)) {
+ netdev_warn(dev,
+ "wd.c: user supplied mem_start or mem_end not on 8kB boundary - ignored.\n");
+ dev->mem_start = 0;
+ dev->mem_end = 0;
+ }
+
+ if ((wd_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
+ netdev_info(dev, version);
+
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = inb(ioaddr + 8 + i);
+
+ netdev_info(dev, "WD80x3 at %#3x, %pM", ioaddr, dev->dev_addr);
+
+ /* The following PureData probe code was contributed by
+ Mike Jagdis <jaggy@purplet.demon.co.uk>. Puredata does software
+ configuration differently from others so we have to check for them.
+ This detects an 8 bit, 16 bit or dumb (Toshiba, jumpered) card.
+ */
+ if (inb(ioaddr+0) == 'P' && inb(ioaddr+1) == 'D') {
+ unsigned char reg5 = inb(ioaddr+5);
+
+ switch (inb(ioaddr+2)) {
+ case 0x03: word16 = 0; model_name = "PDI8023-8"; break;
+ case 0x05: word16 = 0; model_name = "PDUC8023"; break;
+ case 0x0a: word16 = 1; model_name = "PDI8023-16"; break;
+ /* Either 0x01 (dumb) or they've released a new version. */
+ default: word16 = 0; model_name = "PDI8023"; break;
+ }
+ dev->mem_start = ((reg5 & 0x1c) + 0xc0) << 12;
+ dev->irq = (reg5 & 0xe0) == 0xe0 ? 10 : (reg5 >> 5) + 1;
+ } else { /* End of PureData probe */
+ /* This method of checking for a 16-bit board is borrowed from the
+ we.c driver. A simpler method is just to look in ASIC reg. 0x03.
+ I'm comparing the two method in alpha test to make certain they
+ return the same result. */
+ /* Check for the old 8 bit board - it has register 0/8 aliasing.
+ Do NOT check i>=6 here -- it hangs the old 8003 boards! */
+ for (i = 0; i < 6; i++)
+ if (inb(ioaddr+i) != inb(ioaddr+8+i))
+ break;
+ if (i >= 6) {
+ ancient = 1;
+ model_name = "WD8003-old";
+ word16 = 0;
+ } else {
+ int tmp = inb(ioaddr+1); /* fiddle with 16bit bit */
+ outb( tmp ^ 0x01, ioaddr+1 ); /* attempt to clear 16bit bit */
+ if (((inb( ioaddr+1) & 0x01) == 0x01) /* A 16 bit card */
+ && (tmp & 0x01) == 0x01 ) { /* In a 16 slot. */
+ int asic_reg5 = inb(ioaddr+WD_CMDREG5);
+ /* Magic to set ASIC to word-wide mode. */
+ outb( NIC16 | (asic_reg5&0x1f), ioaddr+WD_CMDREG5);
+ outb(tmp, ioaddr+1);
+ model_name = "WD8013";
+ word16 = 1; /* We have a 16bit board here! */
+ } else {
+ model_name = "WD8003";
+ word16 = 0;
+ }
+ outb(tmp, ioaddr+1); /* Restore original reg1 value. */
+ }
+#ifndef final_version
+ if ( !ancient && (inb(ioaddr+1) & 0x01) != (word16 & 0x01))
+ pr_cont("\nWD80?3: Bus width conflict, %d (probe) != %d (reg report).",
+ word16 ? 16 : 8,
+ (inb(ioaddr+1) & 0x01) ? 16 : 8);
+#endif
+ }
+
+#if defined(WD_SHMEM) && WD_SHMEM > 0x80000
+ /* Allow a compile-time override. */
+ dev->mem_start = WD_SHMEM;
+#else
+ if (dev->mem_start == 0) {
+ /* Sanity and old 8003 check */
+ int reg0 = inb(ioaddr);
+ if (reg0 == 0xff || reg0 == 0) {
+ /* Future plan: this could check a few likely locations first. */
+ dev->mem_start = 0xd0000;
+ pr_cont(" assigning address %#lx", dev->mem_start);
+ } else {
+ int high_addr_bits = inb(ioaddr+WD_CMDREG5) & 0x1f;
+ /* Some boards don't have the register 5 -- it returns 0xff. */
+ if (high_addr_bits == 0x1f || word16 == 0)
+ high_addr_bits = 0x01;
+ dev->mem_start = ((reg0&0x3f) << 13) + (high_addr_bits << 19);
+ }
+ }
+#endif
+
+ /* The 8390 isn't at the base address -- the ASIC regs are there! */
+ dev->base_addr = ioaddr+WD_NIC_OFFSET;
+
+ if (dev->irq < 2) {
+ static const int irqmap[] = {9, 3, 5, 7, 10, 11, 15, 4};
+ int reg1 = inb(ioaddr+1);
+ int reg4 = inb(ioaddr+4);
+ if (ancient || reg1 == 0xff) { /* Ack!! No way to read the IRQ! */
+ short nic_addr = ioaddr+WD_NIC_OFFSET;
+ unsigned long irq_mask;
+
+ /* We have an old-style ethercard that doesn't report its IRQ
+ line. Do autoirq to find the IRQ line. Note that this IS NOT
+ a reliable way to trigger an interrupt. */
+ outb_p(E8390_NODMA + E8390_STOP, nic_addr);
+ outb(0x00, nic_addr+EN0_IMR); /* Disable all intrs. */
+
+ irq_mask = probe_irq_on();
+ outb_p(0xff, nic_addr + EN0_IMR); /* Enable all interrupts. */
+ outb_p(0x00, nic_addr + EN0_RCNTLO);
+ outb_p(0x00, nic_addr + EN0_RCNTHI);
+ outb(E8390_RREAD+E8390_START, nic_addr); /* Trigger it... */
+ mdelay(20);
+ dev->irq = probe_irq_off(irq_mask);
+
+ outb_p(0x00, nic_addr+EN0_IMR); /* Mask all intrs. again. */
+
+ if (netif_msg_drv(ei_local))
+ pr_cont(" autoirq is %d", dev->irq);
+ if (dev->irq < 2)
+ dev->irq = word16 ? 10 : 5;
+ } else
+ dev->irq = irqmap[((reg4 >> 5) & 0x03) + (reg1 & 0x04)];
+ } else if (dev->irq == 2) /* Fixup bogosity: IRQ2 is really IRQ9 */
+ dev->irq = 9;
+
+ /* Snarf the interrupt now. There's no point in waiting since we cannot
+ share and the board will usually be enabled. */
+ i = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
+ if (i) {
+ pr_cont(" unable to get IRQ %d.\n", dev->irq);
+ return i;
+ }
+
+ /* OK, were are certain this is going to work. Setup the device. */
+ ei_status.name = model_name;
+ ei_status.word16 = word16;
+ ei_status.tx_start_page = WD_START_PG;
+ ei_status.rx_start_page = WD_START_PG + TX_PAGES;
+
+ /* Don't map in the shared memory until the board is actually opened. */
+
+ /* Some cards (eg WD8003EBT) can be jumpered for more (32k!) memory. */
+ if (dev->mem_end != 0) {
+ ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
+ ei_status.priv = dev->mem_end - dev->mem_start;
+ } else {
+ ei_status.stop_page = word16 ? WD13_STOP_PG : WD03_STOP_PG;
+ dev->mem_end = dev->mem_start + (ei_status.stop_page - WD_START_PG)*256;
+ ei_status.priv = (ei_status.stop_page - WD_START_PG)*256;
+ }
+
+ ei_status.mem = ioremap(dev->mem_start, ei_status.priv);
+ if (!ei_status.mem) {
+ free_irq(dev->irq, dev);
+ return -ENOMEM;
+ }
+
+ pr_cont(" %s, IRQ %d, shared memory at %#lx-%#lx.\n",
+ model_name, dev->irq, dev->mem_start, dev->mem_end-1);
+
+ ei_status.reset_8390 = wd_reset_8390;
+ ei_status.block_input = wd_block_input;
+ ei_status.block_output = wd_block_output;
+ ei_status.get_8390_hdr = wd_get_8390_hdr;
+
+ dev->netdev_ops = &wd_netdev_ops;
+ NS8390_init(dev, 0);
+ ei_local->msg_enable = wd_msg_enable;
+
+#if 1
+ /* Enable interrupt generation on softconfig cards -- M.U */
+ /* .. but possibly potentially unsafe - Donald */
+ if (inb(ioaddr+14) & 0x20)
+ outb(inb(ioaddr+4)|0x80, ioaddr+4);
+#endif
+
+ err = register_netdev(dev);
+ if (err) {
+ free_irq(dev->irq, dev);
+ iounmap(ei_status.mem);
+ }
+ return err;
+}
+
+static int
+wd_open(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
+
+ /* Map in the shared memory. Always set register 0 last to remain
+ compatible with very old boards. */
+ ei_status.reg0 = ((dev->mem_start>>13) & 0x3f) | WD_MEMENB;
+ ei_status.reg5 = ((dev->mem_start>>19) & 0x1f) | NIC16;
+
+ if (ei_status.word16)
+ outb(ei_status.reg5, ioaddr+WD_CMDREG5);
+ outb(ei_status.reg0, ioaddr); /* WD_CMDREG */
+
+ return ei_open(dev);
+}
+
+static void
+wd_reset_8390(struct net_device *dev)
+{
+ int wd_cmd_port = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
+ struct ei_device *ei_local = netdev_priv(dev);
+
+ outb(WD_RESET, wd_cmd_port);
+ netif_dbg(ei_local, hw, dev, "resetting the WD80x3 t=%lu...\n",
+ jiffies);
+ ei_status.txing = 0;
+
+ /* Set up the ASIC registers, just in case something changed them. */
+ outb((((dev->mem_start>>13) & 0x3f)|WD_MEMENB), wd_cmd_port);
+ if (ei_status.word16)
+ outb(NIC16 | ((dev->mem_start>>19) & 0x1f), wd_cmd_port+WD_CMDREG5);
+
+ netif_dbg(ei_local, hw, dev, "reset done\n");
+}
+
+/* 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
+wd_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
+{
+
+ int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
+ void __iomem *hdr_start = ei_status.mem + ((ring_page - WD_START_PG)<<8);
+
+ /* We'll always get a 4 byte header read followed by a packet read, so
+ we enable 16 bit mode before the header, and disable after the body. */
+ if (ei_status.word16)
+ outb(ISA16 | ei_status.reg5, wd_cmdreg+WD_CMDREG5);
+
+#ifdef __BIG_ENDIAN
+ /* Officially this is what we are doing, but the readl() is faster */
+ /* unfortunately it isn't endian aware of the struct */
+ memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
+ hdr->count = le16_to_cpu(hdr->count);
+#else
+ ((unsigned int*)hdr)[0] = readl(hdr_start);
+#endif
+}
+
+/* Block input and output are easy on shared memory ethercards, and trivial
+ on the Western digital card where there is no choice of how to do it.
+ The only complications are that the ring buffer wraps, and need to map
+ switch between 8- and 16-bit modes. */
+
+static void
+wd_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
+{
+ int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
+ unsigned long offset = ring_offset - (WD_START_PG<<8);
+ void __iomem *xfer_start = ei_status.mem + offset;
+
+ if (offset + count > ei_status.priv) {
+ /* We must wrap the input move. */
+ int semi_count = ei_status.priv - offset;
+ memcpy_fromio(skb->data, xfer_start, semi_count);
+ count -= semi_count;
+ memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
+ } else {
+ /* Packet is in one chunk -- we can copy + cksum. */
+ memcpy_fromio(skb->data, xfer_start, count);
+ }
+
+ /* Turn off 16 bit access so that reboot works. ISA brain-damage */
+ if (ei_status.word16)
+ outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5);
+}
+
+static void
+wd_block_output(struct net_device *dev, int count, const unsigned char *buf,
+ int start_page)
+{
+ int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
+ void __iomem *shmem = ei_status.mem + ((start_page - WD_START_PG)<<8);
+
+
+ if (ei_status.word16) {
+ /* Turn on and off 16 bit access so that reboot works. */
+ outb(ISA16 | ei_status.reg5, wd_cmdreg+WD_CMDREG5);
+ memcpy_toio(shmem, buf, count);
+ outb(ei_status.reg5, wd_cmdreg+WD_CMDREG5);
+ } else
+ memcpy_toio(shmem, buf, count);
+}
+
+
+static int
+wd_close(struct net_device *dev)
+{
+ int wd_cmdreg = dev->base_addr - WD_NIC_OFFSET; /* WD_CMDREG */
+ struct ei_device *ei_local = netdev_priv(dev);
+
+ netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n");
+ ei_close(dev);
+
+ /* Change from 16-bit to 8-bit shared memory so reboot works. */
+ if (ei_status.word16)
+ outb(ei_status.reg5, wd_cmdreg + WD_CMDREG5 );
+
+ /* And disable the shared memory. */
+ outb(ei_status.reg0 & ~WD_MEMENB, wd_cmdreg);
+
+ return 0;
+}
+
+
+#ifdef MODULE
+#define MAX_WD_CARDS 4 /* Max number of wd cards per module */
+static struct net_device *dev_wd[MAX_WD_CARDS];
+static int io[MAX_WD_CARDS];
+static int irq[MAX_WD_CARDS];
+static int mem[MAX_WD_CARDS];
+static int mem_end[MAX_WD_CARDS]; /* for non std. mem size */
+
+module_param_array(io, int, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+module_param_array(mem, int, NULL, 0);
+module_param_array(mem_end, int, NULL, 0);
+module_param_named(msg_enable, wd_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
+MODULE_PARM_DESC(io, "I/O base address(es)");
+MODULE_PARM_DESC(irq, "IRQ number(s) (ignored for PureData boards)");
+MODULE_PARM_DESC(mem, "memory base address(es)(ignored for PureData boards)");
+MODULE_PARM_DESC(mem_end, "memory end address(es)");
+MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
+MODULE_DESCRIPTION("ISA Western Digital wd8003/wd8013 ; SMC Elite, Elite16 ethernet driver");
+MODULE_LICENSE("GPL");
+
+/* This is set up so that only a single autoprobe takes place per call.
+ISA device autoprobes on a running machine are not recommended. */
+
+int __init init_module(void)
+{
+ struct net_device *dev;
+ int this_dev, found = 0;
+
+ for (this_dev = 0; this_dev < MAX_WD_CARDS; this_dev++) {
+ if (io[this_dev] == 0) {
+ if (this_dev != 0) break; /* only autoprobe 1st one */
+ printk(KERN_NOTICE "wd.c: Presently autoprobing (not recommended) for a single card.\n");
+ }
+ dev = alloc_ei_netdev();
+ if (!dev)
+ break;
+ dev->irq = irq[this_dev];
+ dev->base_addr = io[this_dev];
+ dev->mem_start = mem[this_dev];
+ dev->mem_end = mem_end[this_dev];
+ if (do_wd_probe(dev) == 0) {
+ dev_wd[found++] = dev;
+ continue;
+ }
+ free_netdev(dev);
+ printk(KERN_WARNING "wd.c: No wd80x3 card found (i/o = 0x%x).\n", io[this_dev]);
+ break;
+ }
+ if (found)
+ return 0;
+ return -ENXIO;
+}
+
+static void cleanup_card(struct net_device *dev)
+{
+ free_irq(dev->irq, dev);
+ release_region(dev->base_addr - WD_NIC_OFFSET, WD_IO_EXTENT);
+ iounmap(ei_status.mem);
+}
+
+void __exit
+cleanup_module(void)
+{
+ int this_dev;
+
+ for (this_dev = 0; this_dev < MAX_WD_CARDS; this_dev++) {
+ struct net_device *dev = dev_wd[this_dev];
+ if (dev) {
+ unregister_netdev(dev);
+ cleanup_card(dev);
+ free_netdev(dev);
+ }
+ }
+}
+#endif /* MODULE */
Code Review / kvmfornfv.git / blobdiff