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path: root/drivers/net/ethernet/i825xx/3c507.c
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Diffstat (limited to 'drivers/net/ethernet/i825xx/3c507.c')
-rw-r--r--drivers/net/ethernet/i825xx/3c507.c938
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diff --git a/drivers/net/ethernet/i825xx/3c507.c b/drivers/net/ethernet/i825xx/3c507.c
deleted file mode 100644
index e8984b059905..000000000000
--- a/drivers/net/ethernet/i825xx/3c507.c
+++ /dev/null
@@ -1,938 +0,0 @@
-/* 3c507.c: An EtherLink16 device driver for Linux. */
-/*
- Written 1993,1994 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
-
-
- Thanks go to jennings@Montrouge.SMR.slb.com ( Patrick Jennings)
- and jrs@world.std.com (Rick Sladkey) for testing and bugfixes.
- Mark Salazar <leslie@access.digex.net> made the changes for cards with
- only 16K packet buffers.
-
- Things remaining to do:
- Verify that the tx and rx buffers don't have fencepost errors.
- Move the theory of operation and memory map documentation.
- The statistics need to be updated correctly.
-*/
-
-#define DRV_NAME "3c507"
-#define DRV_VERSION "1.10a"
-#define DRV_RELDATE "11/17/2001"
-
-static const char version[] =
- DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n";
-
-/*
- Sources:
- This driver wouldn't have been written with the availability of the
- Crynwr driver source code. It provided a known-working implementation
- that filled in the gaping holes of the Intel documentation. Three cheers
- for Russ Nelson.
-
- Intel Microcommunications Databook, Vol. 1, 1990. It provides just enough
- info that the casual reader might think that it documents the i82586 :-<.
-*/
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/string.h>
-#include <linux/spinlock.h>
-#include <linux/ethtool.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/if_ether.h>
-#include <linux/skbuff.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-
-#include <asm/dma.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-/* use 0 for production, 1 for verification, 2..7 for debug */
-#ifndef NET_DEBUG
-#define NET_DEBUG 1
-#endif
-static unsigned int net_debug = NET_DEBUG;
-#define debug net_debug
-
-
-/*
- Details of the i82586.
-
- You'll really need the databook to understand the details of this part,
- but the outline is that the i82586 has two separate processing units.
- Both are started from a list of three configuration tables, of which only
- the last, the System Control Block (SCB), is used after reset-time. The SCB
- has the following fields:
- Status word
- Command word
- Tx/Command block addr.
- Rx block addr.
- The command word accepts the following controls for the Tx and Rx units:
- */
-
-#define CUC_START 0x0100
-#define CUC_RESUME 0x0200
-#define CUC_SUSPEND 0x0300
-#define RX_START 0x0010
-#define RX_RESUME 0x0020
-#define RX_SUSPEND 0x0030
-
-/* The Rx unit uses a list of frame descriptors and a list of data buffer
- descriptors. We use full-sized (1518 byte) data buffers, so there is
- a one-to-one pairing of frame descriptors to buffer descriptors.
-
- The Tx ("command") unit executes a list of commands that look like:
- Status word Written by the 82586 when the command is done.
- Command word Command in lower 3 bits, post-command action in upper 3
- Link word The address of the next command.
- Parameters (as needed).
-
- Some definitions related to the Command Word are:
- */
-#define CMD_EOL 0x8000 /* The last command of the list, stop. */
-#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
-#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
-
-enum commands {
- CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
- CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7};
-
-/* Information that need to be kept for each board. */
-struct net_local {
- int last_restart;
- ushort rx_head;
- ushort rx_tail;
- ushort tx_head;
- ushort tx_cmd_link;
- ushort tx_reap;
- ushort tx_pkts_in_ring;
- spinlock_t lock;
- void __iomem *base;
-};
-
-/*
- Details of the EtherLink16 Implementation
- The 3c507 is a generic shared-memory i82586 implementation.
- The host can map 16K, 32K, 48K, or 64K of the 64K memory into
- 0x0[CD][08]0000, or all 64K into 0xF[02468]0000.
- */
-
-/* Offsets from the base I/O address. */
-#define SA_DATA 0 /* Station address data, or 3Com signature. */
-#define MISC_CTRL 6 /* Switch the SA_DATA banks, and bus config bits. */
-#define RESET_IRQ 10 /* Reset the latched IRQ line. */
-#define SIGNAL_CA 11 /* Frob the 82586 Channel Attention line. */
-#define ROM_CONFIG 13
-#define MEM_CONFIG 14
-#define IRQ_CONFIG 15
-#define EL16_IO_EXTENT 16
-
-/* The ID port is used at boot-time to locate the ethercard. */
-#define ID_PORT 0x100
-
-/* Offsets to registers in the mailbox (SCB). */
-#define iSCB_STATUS 0x8
-#define iSCB_CMD 0xA
-#define iSCB_CBL 0xC /* Command BLock offset. */
-#define iSCB_RFA 0xE /* Rx Frame Area offset. */
-
-/* Since the 3c507 maps the shared memory window so that the last byte is
- at 82586 address FFFF, the first byte is at 82586 address 0, 16K, 32K, or
- 48K corresponding to window sizes of 64K, 48K, 32K and 16K respectively.
- We can account for this be setting the 'SBC Base' entry in the ISCP table
- below for all the 16 bit offset addresses, and also adding the 'SCB Base'
- value to all 24 bit physical addresses (in the SCP table and the TX and RX
- Buffer Descriptors).
- -Mark
- */
-#define SCB_BASE ((unsigned)64*1024 - (dev->mem_end - dev->mem_start))
-
-/*
- What follows in 'init_words[]' is the "program" that is downloaded to the
- 82586 memory. It's mostly tables and command blocks, and starts at the
- reset address 0xfffff6. This is designed to be similar to the EtherExpress,
- thus the unusual location of the SCB at 0x0008.
-
- Even with the additional "don't care" values, doing it this way takes less
- program space than initializing the individual tables, and I feel it's much
- cleaner.
-
- The databook is particularly useless for the first two structures, I had
- to use the Crynwr driver as an example.
-
- The memory setup is as follows:
- */
-
-#define CONFIG_CMD 0x0018
-#define SET_SA_CMD 0x0024
-#define SA_OFFSET 0x002A
-#define IDLELOOP 0x30
-#define TDR_CMD 0x38
-#define TDR_TIME 0x3C
-#define DUMP_CMD 0x40
-#define DIAG_CMD 0x48
-#define SET_MC_CMD 0x4E
-#define DUMP_DATA 0x56 /* A 170 byte buffer for dump and Set-MC into. */
-
-#define TX_BUF_START 0x0100
-#define NUM_TX_BUFS 5
-#define TX_BUF_SIZE (1518+14+20+16) /* packet+header+TBD */
-
-#define RX_BUF_START 0x2000
-#define RX_BUF_SIZE (1518+14+18) /* packet+header+RBD */
-#define RX_BUF_END (dev->mem_end - dev->mem_start)
-
-#define TX_TIMEOUT (HZ/20)
-
-/*
- That's it: only 86 bytes to set up the beast, including every extra
- command available. The 170 byte buffer at DUMP_DATA is shared between the
- Dump command (called only by the diagnostic program) and the SetMulticastList
- command.
-
- To complete the memory setup you only have to write the station address at
- SA_OFFSET and create the Tx & Rx buffer lists.
-
- The Tx command chain and buffer list is setup as follows:
- A Tx command table, with the data buffer pointing to...
- A Tx data buffer descriptor. The packet is in a single buffer, rather than
- chaining together several smaller buffers.
- A NoOp command, which initially points to itself,
- And the packet data.
-
- A transmit is done by filling in the Tx command table and data buffer,
- re-writing the NoOp command, and finally changing the offset of the last
- command to point to the current Tx command. When the Tx command is finished,
- it jumps to the NoOp, when it loops until the next Tx command changes the
- "link offset" in the NoOp. This way the 82586 never has to go through the
- slow restart sequence.
-
- The Rx buffer list is set up in the obvious ring structure. We have enough
- memory (and low enough interrupt latency) that we can avoid the complicated
- Rx buffer linked lists by alway associating a full-size Rx data buffer with
- each Rx data frame.
-
- I current use four transmit buffers starting at TX_BUF_START (0x0100), and
- use the rest of memory, from RX_BUF_START to RX_BUF_END, for Rx buffers.
-
- */
-
-static unsigned short init_words[] = {
- /* System Configuration Pointer (SCP). */
- 0x0000, /* Set bus size to 16 bits. */
- 0,0, /* pad words. */
- 0x0000,0x0000, /* ISCP phys addr, set in init_82586_mem(). */
-
- /* Intermediate System Configuration Pointer (ISCP). */
- 0x0001, /* Status word that's cleared when init is done. */
- 0x0008,0,0, /* SCB offset, (skip, skip) */
-
- /* System Control Block (SCB). */
- 0,0xf000|RX_START|CUC_START, /* SCB status and cmd. */
- CONFIG_CMD, /* Command list pointer, points to Configure. */
- RX_BUF_START, /* Rx block list. */
- 0,0,0,0, /* Error count: CRC, align, buffer, overrun. */
-
- /* 0x0018: Configure command. Change to put MAC data with packet. */
- 0, CmdConfigure, /* Status, command. */
- SET_SA_CMD, /* Next command is Set Station Addr. */
- 0x0804, /* "4" bytes of config data, 8 byte FIFO. */
- 0x2e40, /* Magic values, including MAC data location. */
- 0, /* Unused pad word. */
-
- /* 0x0024: Setup station address command. */
- 0, CmdSASetup,
- SET_MC_CMD, /* Next command. */
- 0xaa00,0xb000,0x0bad, /* Station address (to be filled in) */
-
- /* 0x0030: NOP, looping back to itself. Point to first Tx buffer to Tx. */
- 0, CmdNOp, IDLELOOP, 0 /* pad */,
-
- /* 0x0038: A unused Time-Domain Reflectometer command. */
- 0, CmdTDR, IDLELOOP, 0,
-
- /* 0x0040: An unused Dump State command. */
- 0, CmdDump, IDLELOOP, DUMP_DATA,
-
- /* 0x0048: An unused Diagnose command. */
- 0, CmdDiagnose, IDLELOOP,
-
- /* 0x004E: An empty set-multicast-list command. */
- 0, CmdMulticastList, IDLELOOP, 0,
-};
-
-/* Index to functions, as function prototypes. */
-
-static int el16_probe1(struct net_device *dev, int ioaddr);
-static int el16_open(struct net_device *dev);
-static netdev_tx_t el16_send_packet(struct sk_buff *skb,
- struct net_device *dev);
-static irqreturn_t el16_interrupt(int irq, void *dev_id);
-static void el16_rx(struct net_device *dev);
-static int el16_close(struct net_device *dev);
-static void el16_tx_timeout (struct net_device *dev);
-
-static void hardware_send_packet(struct net_device *dev, void *buf, short length, short pad);
-static void init_82586_mem(struct net_device *dev);
-static const struct ethtool_ops netdev_ethtool_ops;
-static void init_rx_bufs(struct net_device *);
-
-static int io = 0x300;
-static int irq;
-static int mem_start;
-
-
-/* Check for a network adaptor of this type, and return '0' iff one exists.
- If dev->base_addr == 0, probe all likely locations.
- If dev->base_addr == 1, always return failure.
- If dev->base_addr == 2, (detachable devices only) allocate space for the
- device and return success.
- */
-
-struct net_device * __init el16_probe(int unit)
-{
- struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
- static const unsigned ports[] = { 0x300, 0x320, 0x340, 0x280, 0};
- const unsigned *port;
- int err = -ENODEV;
-
- if (!dev)
- return ERR_PTR(-ENODEV);
-
- if (unit >= 0) {
- sprintf(dev->name, "eth%d", unit);
- netdev_boot_setup_check(dev);
- io = dev->base_addr;
- irq = dev->irq;
- mem_start = dev->mem_start & 15;
- }
-
- if (io > 0x1ff) /* Check a single specified location. */
- err = el16_probe1(dev, io);
- else if (io != 0)
- err = -ENXIO; /* Don't probe at all. */
- else {
- for (port = ports; *port; port++) {
- err = el16_probe1(dev, *port);
- if (!err)
- break;
- }
- }
-
- if (err)
- goto out;
- err = register_netdev(dev);
- if (err)
- goto out1;
- return dev;
-out1:
- free_irq(dev->irq, dev);
- iounmap(((struct net_local *)netdev_priv(dev))->base);
- release_region(dev->base_addr, EL16_IO_EXTENT);
-out:
- free_netdev(dev);
- return ERR_PTR(err);
-}
-
-static const struct net_device_ops netdev_ops = {
- .ndo_open = el16_open,
- .ndo_stop = el16_close,
- .ndo_start_xmit = el16_send_packet,
- .ndo_tx_timeout = el16_tx_timeout,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __init el16_probe1(struct net_device *dev, int ioaddr)
-{
- static unsigned char init_ID_done;
- int i, irq, irqval, retval;
- struct net_local *lp;
-
- if (init_ID_done == 0) {
- ushort lrs_state = 0xff;
- /* Send the ID sequence to the ID_PORT to enable the board(s). */
- outb(0x00, ID_PORT);
- for(i = 0; i < 255; i++) {
- outb(lrs_state, ID_PORT);
- lrs_state <<= 1;
- if (lrs_state & 0x100)
- lrs_state ^= 0xe7;
- }
- outb(0x00, ID_PORT);
- init_ID_done = 1;
- }
-
- if (!request_region(ioaddr, EL16_IO_EXTENT, DRV_NAME))
- return -ENODEV;
-
- if ((inb(ioaddr) != '*') || (inb(ioaddr + 1) != '3') ||
- (inb(ioaddr + 2) != 'C') || (inb(ioaddr + 3) != 'O')) {
- retval = -ENODEV;
- goto out;
- }
-
- pr_info("%s: 3c507 at %#x,", dev->name, ioaddr);
-
- /* We should make a few more checks here, like the first three octets of
- the S.A. for the manufacturer's code. */
-
- irq = inb(ioaddr + IRQ_CONFIG) & 0x0f;
-
- irqval = request_irq(irq, el16_interrupt, 0, DRV_NAME, dev);
- if (irqval) {
- pr_cont("\n");
- pr_err("3c507: unable to get IRQ %d (irqval=%d).\n", irq, irqval);
- retval = -EAGAIN;
- goto out;
- }
-
- /* We've committed to using the board, and can start filling in *dev. */
- dev->base_addr = ioaddr;
-
- outb(0x01, ioaddr + MISC_CTRL);
- for (i = 0; i < 6; i++)
- dev->dev_addr[i] = inb(ioaddr + i);
- pr_cont(" %pM", dev->dev_addr);
-
- if (mem_start)
- net_debug = mem_start & 7;
-
-#ifdef MEM_BASE
- dev->mem_start = MEM_BASE;
- dev->mem_end = dev->mem_start + 0x10000;
-#else
- {
- int base;
- int size;
- char mem_config = inb(ioaddr + MEM_CONFIG);
- if (mem_config & 0x20) {
- size = 64*1024;
- base = 0xf00000 + (mem_config & 0x08 ? 0x080000
- : ((mem_config & 3) << 17));
- } else {
- size = ((mem_config & 3) + 1) << 14;
- base = 0x0c0000 + ( (mem_config & 0x18) << 12);
- }
- dev->mem_start = base;
- dev->mem_end = base + size;
- }
-#endif
-
- dev->if_port = (inb(ioaddr + ROM_CONFIG) & 0x80) ? 1 : 0;
- dev->irq = inb(ioaddr + IRQ_CONFIG) & 0x0f;
-
- pr_cont(", IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->irq,
- dev->if_port ? "ex" : "in", dev->mem_start, dev->mem_end-1);
-
- if (net_debug)
- pr_debug("%s", version);
-
- lp = netdev_priv(dev);
- spin_lock_init(&lp->lock);
- lp->base = ioremap(dev->mem_start, RX_BUF_END);
- if (!lp->base) {
- pr_err("3c507: unable to remap memory\n");
- retval = -EAGAIN;
- goto out1;
- }
-
- dev->netdev_ops = &netdev_ops;
- dev->watchdog_timeo = TX_TIMEOUT;
- dev->ethtool_ops = &netdev_ethtool_ops;
- dev->flags &= ~IFF_MULTICAST; /* Multicast doesn't work */
- return 0;
-out1:
- free_irq(dev->irq, dev);
-out:
- release_region(ioaddr, EL16_IO_EXTENT);
- return retval;
-}
-
-static int el16_open(struct net_device *dev)
-{
- /* Initialize the 82586 memory and start it. */
- init_82586_mem(dev);
-
- netif_start_queue(dev);
- return 0;
-}
-
-
-static void el16_tx_timeout (struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
- void __iomem *shmem = lp->base;
-
- if (net_debug > 1)
- pr_debug("%s: transmit timed out, %s? ", dev->name,
- readw(shmem + iSCB_STATUS) & 0x8000 ? "IRQ conflict" :
- "network cable problem");
- /* Try to restart the adaptor. */
- if (lp->last_restart == dev->stats.tx_packets) {
- if (net_debug > 1)
- pr_cont("Resetting board.\n");
- /* Completely reset the adaptor. */
- init_82586_mem (dev);
- lp->tx_pkts_in_ring = 0;
- } else {
- /* Issue the channel attention signal and hope it "gets better". */
- if (net_debug > 1)
- pr_cont("Kicking board.\n");
- writew(0xf000 | CUC_START | RX_START, shmem + iSCB_CMD);
- outb (0, ioaddr + SIGNAL_CA); /* Issue channel-attn. */
- lp->last_restart = dev->stats.tx_packets;
- }
- dev->trans_start = jiffies; /* prevent tx timeout */
- netif_wake_queue (dev);
-}
-
-
-static netdev_tx_t el16_send_packet (struct sk_buff *skb,
- struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
- unsigned long flags;
- short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
- unsigned char *buf = skb->data;
-
- netif_stop_queue (dev);
-
- spin_lock_irqsave (&lp->lock, flags);
-
- dev->stats.tx_bytes += length;
- /* Disable the 82586's input to the interrupt line. */
- outb (0x80, ioaddr + MISC_CTRL);
-
- hardware_send_packet (dev, buf, skb->len, length - skb->len);
-
- /* Enable the 82586 interrupt input. */
- outb (0x84, ioaddr + MISC_CTRL);
-
- spin_unlock_irqrestore (&lp->lock, flags);
-
- dev_kfree_skb (skb);
-
- /* You might need to clean up and record Tx statistics here. */
-
- return NETDEV_TX_OK;
-}
-
-/* The typical workload of the driver:
- Handle the network interface interrupts. */
-static irqreturn_t el16_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct net_local *lp;
- int ioaddr, status, boguscount = 0;
- ushort ack_cmd = 0;
- void __iomem *shmem;
-
- if (dev == NULL) {
- pr_err("net_interrupt(): irq %d for unknown device.\n", irq);
- return IRQ_NONE;
- }
-
- ioaddr = dev->base_addr;
- lp = netdev_priv(dev);
- shmem = lp->base;
-
- spin_lock(&lp->lock);
-
- status = readw(shmem+iSCB_STATUS);
-
- if (net_debug > 4) {
- pr_debug("%s: 3c507 interrupt, status %4.4x.\n", dev->name, status);
- }
-
- /* Disable the 82586's input to the interrupt line. */
- outb(0x80, ioaddr + MISC_CTRL);
-
- /* Reap the Tx packet buffers. */
- while (lp->tx_pkts_in_ring) {
- unsigned short tx_status = readw(shmem+lp->tx_reap);
- if (!(tx_status & 0x8000)) {
- if (net_debug > 5)
- pr_debug("Tx command incomplete (%#x).\n", lp->tx_reap);
- break;
- }
- /* Tx unsuccessful or some interesting status bit set. */
- if (!(tx_status & 0x2000) || (tx_status & 0x0f3f)) {
- dev->stats.tx_errors++;
- if (tx_status & 0x0600) dev->stats.tx_carrier_errors++;
- if (tx_status & 0x0100) dev->stats.tx_fifo_errors++;
- if (!(tx_status & 0x0040)) dev->stats.tx_heartbeat_errors++;
- if (tx_status & 0x0020) dev->stats.tx_aborted_errors++;
- dev->stats.collisions += tx_status & 0xf;
- }
- dev->stats.tx_packets++;
- if (net_debug > 5)
- pr_debug("Reaped %x, Tx status %04x.\n" , lp->tx_reap, tx_status);
- lp->tx_reap += TX_BUF_SIZE;
- if (lp->tx_reap > RX_BUF_START - TX_BUF_SIZE)
- lp->tx_reap = TX_BUF_START;
-
- lp->tx_pkts_in_ring--;
- /* There is always more space in the Tx ring buffer now. */
- netif_wake_queue(dev);
-
- if (++boguscount > 10)
- break;
- }
-
- if (status & 0x4000) { /* Packet received. */
- if (net_debug > 5)
- pr_debug("Received packet, rx_head %04x.\n", lp->rx_head);
- el16_rx(dev);
- }
-
- /* Acknowledge the interrupt sources. */
- ack_cmd = status & 0xf000;
-
- if ((status & 0x0700) != 0x0200 && netif_running(dev)) {
- if (net_debug)
- pr_debug("%s: Command unit stopped, status %04x, restarting.\n",
- dev->name, status);
- /* If this ever occurs we should really re-write the idle loop, reset
- the Tx list, and do a complete restart of the command unit.
- For now we rely on the Tx timeout if the resume doesn't work. */
- ack_cmd |= CUC_RESUME;
- }
-
- if ((status & 0x0070) != 0x0040 && netif_running(dev)) {
- /* The Rx unit is not ready, it must be hung. Restart the receiver by
- initializing the rx buffers, and issuing an Rx start command. */
- if (net_debug)
- pr_debug("%s: Rx unit stopped, status %04x, restarting.\n",
- dev->name, status);
- init_rx_bufs(dev);
- writew(RX_BUF_START,shmem+iSCB_RFA);
- ack_cmd |= RX_START;
- }
-
- writew(ack_cmd,shmem+iSCB_CMD);
- outb(0, ioaddr + SIGNAL_CA); /* Issue channel-attn. */
-
- /* Clear the latched interrupt. */
- outb(0, ioaddr + RESET_IRQ);
-
- /* Enable the 82586's interrupt input. */
- outb(0x84, ioaddr + MISC_CTRL);
- spin_unlock(&lp->lock);
- return IRQ_HANDLED;
-}
-
-static int el16_close(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
- void __iomem *shmem = lp->base;
-
- netif_stop_queue(dev);
-
- /* Flush the Tx and disable Rx. */
- writew(RX_SUSPEND | CUC_SUSPEND,shmem+iSCB_CMD);
- outb(0, ioaddr + SIGNAL_CA);
-
- /* Disable the 82586's input to the interrupt line. */
- outb(0x80, ioaddr + MISC_CTRL);
-
- /* We always physically use the IRQ line, so we don't do free_irq(). */
-
- /* Update the statistics here. */
-
- return 0;
-}
-
-/* Initialize the Rx-block list. */
-static void init_rx_bufs(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- void __iomem *write_ptr;
- unsigned short SCB_base = SCB_BASE;
-
- int cur_rxbuf = lp->rx_head = RX_BUF_START;
-
- /* Initialize each Rx frame + data buffer. */
- do { /* While there is room for one more. */
-
- write_ptr = lp->base + cur_rxbuf;
-
- writew(0x0000,write_ptr); /* Status */
- writew(0x0000,write_ptr+=2); /* Command */
- writew(cur_rxbuf + RX_BUF_SIZE,write_ptr+=2); /* Link */
- writew(cur_rxbuf + 22,write_ptr+=2); /* Buffer offset */
- writew(0x0000,write_ptr+=2); /* Pad for dest addr. */
- writew(0x0000,write_ptr+=2);
- writew(0x0000,write_ptr+=2);
- writew(0x0000,write_ptr+=2); /* Pad for source addr. */
- writew(0x0000,write_ptr+=2);
- writew(0x0000,write_ptr+=2);
- writew(0x0000,write_ptr+=2); /* Pad for protocol. */
-
- writew(0x0000,write_ptr+=2); /* Buffer: Actual count */
- writew(-1,write_ptr+=2); /* Buffer: Next (none). */
- writew(cur_rxbuf + 0x20 + SCB_base,write_ptr+=2);/* Buffer: Address low */
- writew(0x0000,write_ptr+=2);
- /* Finally, the number of bytes in the buffer. */
- writew(0x8000 + RX_BUF_SIZE-0x20,write_ptr+=2);
-
- lp->rx_tail = cur_rxbuf;
- cur_rxbuf += RX_BUF_SIZE;
- } while (cur_rxbuf <= RX_BUF_END - RX_BUF_SIZE);
-
- /* Terminate the list by setting the EOL bit, and wrap the pointer to make
- the list a ring. */
- write_ptr = lp->base + lp->rx_tail + 2;
- writew(0xC000,write_ptr); /* Command, mark as last. */
- writew(lp->rx_head,write_ptr+2); /* Link */
-}
-
-static void init_82586_mem(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- short ioaddr = dev->base_addr;
- void __iomem *shmem = lp->base;
-
- /* Enable loopback to protect the wire while starting up,
- and hold the 586 in reset during the memory initialization. */
- outb(0x20, ioaddr + MISC_CTRL);
-
- /* Fix the ISCP address and base. */
- init_words[3] = SCB_BASE;
- init_words[7] = SCB_BASE;
-
- /* Write the words at 0xfff6 (address-aliased to 0xfffff6). */
- memcpy_toio(lp->base + RX_BUF_END - 10, init_words, 10);
-
- /* Write the words at 0x0000. */
- memcpy_toio(lp->base, init_words + 5, sizeof(init_words) - 10);
-
- /* Fill in the station address. */
- memcpy_toio(lp->base+SA_OFFSET, dev->dev_addr, ETH_ALEN);
-
- /* The Tx-block list is written as needed. We just set up the values. */
- lp->tx_cmd_link = IDLELOOP + 4;
- lp->tx_head = lp->tx_reap = TX_BUF_START;
-
- init_rx_bufs(dev);
-
- /* Start the 586 by releasing the reset line, but leave loopback. */
- outb(0xA0, ioaddr + MISC_CTRL);
-
- /* This was time consuming to track down: you need to give two channel
- attention signals to reliably start up the i82586. */
- outb(0, ioaddr + SIGNAL_CA);
-
- {
- int boguscnt = 50;
- while (readw(shmem+iSCB_STATUS) == 0)
- if (--boguscnt == 0) {
- pr_warning("%s: i82586 initialization timed out with status %04x, cmd %04x.\n",
- dev->name, readw(shmem+iSCB_STATUS), readw(shmem+iSCB_CMD));
- break;
- }
- /* Issue channel-attn -- the 82586 won't start. */
- outb(0, ioaddr + SIGNAL_CA);
- }
-
- /* Disable loopback and enable interrupts. */
- outb(0x84, ioaddr + MISC_CTRL);
- if (net_debug > 4)
- pr_debug("%s: Initialized 82586, status %04x.\n", dev->name,
- readw(shmem+iSCB_STATUS));
-}
-
-static void hardware_send_packet(struct net_device *dev, void *buf, short length, short pad)
-{
- struct net_local *lp = netdev_priv(dev);
- short ioaddr = dev->base_addr;
- ushort tx_block = lp->tx_head;
- void __iomem *write_ptr = lp->base + tx_block;
- static char padding[ETH_ZLEN];
-
- /* Set the write pointer to the Tx block, and put out the header. */
- writew(0x0000,write_ptr); /* Tx status */
- writew(CMD_INTR|CmdTx,write_ptr+=2); /* Tx command */
- writew(tx_block+16,write_ptr+=2); /* Next command is a NoOp. */
- writew(tx_block+8,write_ptr+=2); /* Data Buffer offset. */
-
- /* Output the data buffer descriptor. */
- writew((pad + length) | 0x8000,write_ptr+=2); /* Byte count parameter. */
- writew(-1,write_ptr+=2); /* No next data buffer. */
- writew(tx_block+22+SCB_BASE,write_ptr+=2); /* Buffer follows the NoOp command. */
- writew(0x0000,write_ptr+=2); /* Buffer address high bits (always zero). */
-
- /* Output the Loop-back NoOp command. */
- writew(0x0000,write_ptr+=2); /* Tx status */
- writew(CmdNOp,write_ptr+=2); /* Tx command */
- writew(tx_block+16,write_ptr+=2); /* Next is myself. */
-
- /* Output the packet at the write pointer. */
- memcpy_toio(write_ptr+2, buf, length);
- if (pad)
- memcpy_toio(write_ptr+length+2, padding, pad);
-
- /* Set the old command link pointing to this send packet. */
- writew(tx_block,lp->base + lp->tx_cmd_link);
- lp->tx_cmd_link = tx_block + 20;
-
- /* Set the next free tx region. */
- lp->tx_head = tx_block + TX_BUF_SIZE;
- if (lp->tx_head > RX_BUF_START - TX_BUF_SIZE)
- lp->tx_head = TX_BUF_START;
-
- if (net_debug > 4) {
- pr_debug("%s: 3c507 @%x send length = %d, tx_block %3x, next %3x.\n",
- dev->name, ioaddr, length, tx_block, lp->tx_head);
- }
-
- /* Grimly block further packets if there has been insufficient reaping. */
- if (++lp->tx_pkts_in_ring < NUM_TX_BUFS)
- netif_wake_queue(dev);
-}
-
-static void el16_rx(struct net_device *dev)
-{
- struct net_local *lp = netdev_priv(dev);
- void __iomem *shmem = lp->base;
- ushort rx_head = lp->rx_head;
- ushort rx_tail = lp->rx_tail;
- ushort boguscount = 10;
- short frame_status;
-
- while ((frame_status = readw(shmem+rx_head)) < 0) { /* Command complete */
- void __iomem *read_frame = lp->base + rx_head;
- ushort rfd_cmd = readw(read_frame+2);
- ushort next_rx_frame = readw(read_frame+4);
- ushort data_buffer_addr = readw(read_frame+6);
- void __iomem *data_frame = lp->base + data_buffer_addr;
- ushort pkt_len = readw(data_frame);
-
- if (rfd_cmd != 0 || data_buffer_addr != rx_head + 22 ||
- (pkt_len & 0xC000) != 0xC000) {
- pr_err("%s: Rx frame at %#x corrupted, "
- "status %04x cmd %04x next %04x "
- "data-buf @%04x %04x.\n",
- dev->name, rx_head, frame_status, rfd_cmd,
- next_rx_frame, data_buffer_addr, pkt_len);
- } else if ((frame_status & 0x2000) == 0) {
- /* Frame Rxed, but with error. */
- dev->stats.rx_errors++;
- if (frame_status & 0x0800) dev->stats.rx_crc_errors++;
- if (frame_status & 0x0400) dev->stats.rx_frame_errors++;
- if (frame_status & 0x0200) dev->stats.rx_fifo_errors++;
- if (frame_status & 0x0100) dev->stats.rx_over_errors++;
- if (frame_status & 0x0080) dev->stats.rx_length_errors++;
- } else {
- /* Malloc up new buffer. */
- struct sk_buff *skb;
-
- pkt_len &= 0x3fff;
- skb = netdev_alloc_skb(dev, pkt_len + 2);
- if (skb == NULL) {
- pr_err("%s: Memory squeeze, dropping packet.\n",
- dev->name);
- dev->stats.rx_dropped++;
- break;
- }
-
- skb_reserve(skb,2);
-
- /* 'skb->data' points to the start of sk_buff data area. */
- memcpy_fromio(skb_put(skb,pkt_len), data_frame + 10, pkt_len);
-
- skb->protocol=eth_type_trans(skb,dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
- }
-
- /* Clear the status word and set End-of-List on the rx frame. */
- writew(0,read_frame);
- writew(0xC000,read_frame+2);
- /* Clear the end-of-list on the prev. RFD. */
- writew(0x0000,lp->base + rx_tail + 2);
-
- rx_tail = rx_head;
- rx_head = next_rx_frame;
- if (--boguscount == 0)
- break;
- }
-
- lp->rx_head = rx_head;
- lp->rx_tail = rx_tail;
-}
-
-static void netdev_get_drvinfo(struct net_device *dev,
- struct ethtool_drvinfo *info)
-{
- strcpy(info->driver, DRV_NAME);
- strcpy(info->version, DRV_VERSION);
- sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
-}
-
-static u32 netdev_get_msglevel(struct net_device *dev)
-{
- return debug;
-}
-
-static void netdev_set_msglevel(struct net_device *dev, u32 level)
-{
- debug = level;
-}
-
-static const struct ethtool_ops netdev_ethtool_ops = {
- .get_drvinfo = netdev_get_drvinfo,
- .get_msglevel = netdev_get_msglevel,
- .set_msglevel = netdev_set_msglevel,
-};
-
-#ifdef MODULE
-static struct net_device *dev_3c507;
-module_param(io, int, 0);
-module_param(irq, int, 0);
-MODULE_PARM_DESC(io, "EtherLink16 I/O base address");
-MODULE_PARM_DESC(irq, "(ignored)");
-
-int __init init_module(void)
-{
- if (io == 0)
- pr_notice("3c507: You should not use auto-probing with insmod!\n");
- dev_3c507 = el16_probe(-1);
- return IS_ERR(dev_3c507) ? PTR_ERR(dev_3c507) : 0;
-}
-
-void __exit
-cleanup_module(void)
-{
- struct net_device *dev = dev_3c507;
- unregister_netdev(dev);
- free_irq(dev->irq, dev);
- iounmap(((struct net_local *)netdev_priv(dev))->base);
- release_region(dev->base_addr, EL16_IO_EXTENT);
- free_netdev(dev);
-}
-#endif /* MODULE */
-MODULE_LICENSE("GPL");