+++ /dev/null
-/*
- * Linux Ethernet device driver for the 3Com Etherlink Plus (3C505)
- * By Craig Southeren, Juha Laiho and Philip Blundell
- *
- * 3c505.c This module implements an interface to the 3Com
- * Etherlink Plus (3c505) Ethernet card. Linux device
- * driver interface reverse engineered from the Linux 3C509
- * device drivers. Some 3C505 information gleaned from
- * the Crynwr packet driver. Still this driver would not
- * be here without 3C505 technical reference provided by
- * 3Com.
- *
- * $Id: 3c505.c,v 1.10 1996/04/16 13:06:27 phil Exp $
- *
- * Authors: Linux 3c505 device driver by
- * Craig Southeren, <craigs@ineluki.apana.org.au>
- * Final debugging by
- * Andrew Tridgell, <tridge@nimbus.anu.edu.au>
- * Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by
- * Juha Laiho, <jlaiho@ichaos.nullnet.fi>
- * Linux 3C509 driver by
- * Donald Becker, <becker@super.org>
- * (Now at <becker@scyld.com>)
- * Crynwr packet driver by
- * Krishnan Gopalan and Gregg Stefancik,
- * Clemson University Engineering Computer Operations.
- * Portions of the code have been adapted from the 3c505
- * driver for NCSA Telnet by Bruce Orchard and later
- * modified by Warren Van Houten and krus@diku.dk.
- * 3C505 technical information provided by
- * Terry Murphy, of 3Com Network Adapter Division
- * Linux 1.3.0 changes by
- * Alan Cox <Alan.Cox@linux.org>
- * More debugging, DMA support, currently maintained by
- * Philip Blundell <philb@gnu.org>
- * Multicard/soft configurable dma channel/rev 2 hardware support
- * by Christopher Collins <ccollins@pcug.org.au>
- * Ethtool support (jgarzik), 11/17/2001
- */
-
-#define DRV_NAME "3c505"
-#define DRV_VERSION "1.10a"
-
-
-/* Theory of operation:
- *
- * The 3c505 is quite an intelligent board. All communication with it is done
- * by means of Primary Command Blocks (PCBs); these are transferred using PIO
- * through the command register. The card has 256k of on-board RAM, which is
- * used to buffer received packets. It might seem at first that more buffers
- * are better, but in fact this isn't true. From my tests, it seems that
- * more than about 10 buffers are unnecessary, and there is a noticeable
- * performance hit in having more active on the card. So the majority of the
- * card's memory isn't, in fact, used. Sadly, the card only has one transmit
- * buffer and, short of loading our own firmware into it (which is what some
- * drivers resort to) there's nothing we can do about this.
- *
- * We keep up to 4 "receive packet" commands active on the board at a time.
- * When a packet comes in, so long as there is a receive command active, the
- * board will send us a "packet received" PCB and then add the data for that
- * packet to the DMA queue. If a DMA transfer is not already in progress, we
- * set one up to start uploading the data. We have to maintain a list of
- * backlogged receive packets, because the card may decide to tell us about
- * a newly-arrived packet at any time, and we may not be able to start a DMA
- * transfer immediately (ie one may already be going on). We can't NAK the
- * PCB, because then it would throw the packet away.
- *
- * Trying to send a PCB to the card at the wrong moment seems to have bad
- * effects. If we send it a transmit PCB while a receive DMA is happening,
- * it will just NAK the PCB and so we will have wasted our time. Worse, it
- * sometimes seems to interrupt the transfer. The majority of the low-level
- * code is protected by one huge semaphore -- "busy" -- which is set whenever
- * it probably isn't safe to do anything to the card. The receive routine
- * must gain a lock on "busy" before it can start a DMA transfer, and the
- * transmit routine must gain a lock before it sends the first PCB to the card.
- * The send_pcb() routine also has an internal semaphore to protect it against
- * being re-entered (which would be disastrous) -- this is needed because
- * several things can happen asynchronously (re-priming the receiver and
- * asking the card for statistics, for example). send_pcb() will also refuse
- * to talk to the card at all if a DMA upload is happening. The higher-level
- * networking code will reschedule a later retry if some part of the driver
- * is blocked. In practice, this doesn't seem to happen very often.
- */
-
-/* This driver may now work with revision 2.x hardware, since all the read
- * operations on the HCR have been removed (we now keep our own softcopy).
- * But I don't have an old card to test it on.
- *
- * This has had the bad effect that the autoprobe routine is now a bit
- * less friendly to other devices. However, it was never very good.
- * before, so I doubt it will hurt anybody.
- */
-
-/* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly
- * to make it more reliable, and secondly to add DMA mode. Many things could
- * probably be done better; the concurrency protection is particularly awful.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/interrupt.h>
-#include <linux/errno.h>
-#include <linux/in.h>
-#include <linux/ioport.h>
-#include <linux/spinlock.h>
-#include <linux/ethtool.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-#include <linux/gfp.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/init.h>
-
-#include "3c505.h"
-
-/*********************************************************
- *
- * define debug messages here as common strings to reduce space
- *
- *********************************************************/
-
-#define timeout_msg "*** timeout at %s:%s (line %d) ***\n"
-#define TIMEOUT_MSG(lineno) \
- pr_notice(timeout_msg, __FILE__, __func__, (lineno))
-
-#define invalid_pcb_msg "*** invalid pcb length %d at %s:%s (line %d) ***\n"
-#define INVALID_PCB_MSG(len) \
- pr_notice(invalid_pcb_msg, (len), __FILE__, __func__, __LINE__)
-
-#define search_msg "%s: Looking for 3c505 adapter at address %#x..."
-
-#define stilllooking_msg "still looking..."
-
-#define found_msg "found.\n"
-
-#define notfound_msg "not found (reason = %d)\n"
-
-#define couldnot_msg "%s: 3c505 not found\n"
-
-/*********************************************************
- *
- * various other debug stuff
- *
- *********************************************************/
-
-#ifdef ELP_DEBUG
-static int elp_debug = ELP_DEBUG;
-#else
-static int elp_debug;
-#endif
-#define debug elp_debug
-
-/*
- * 0 = no messages (well, some)
- * 1 = messages when high level commands performed
- * 2 = messages when low level commands performed
- * 3 = messages when interrupts received
- */
-
-/*****************************************************************
- *
- * List of I/O-addresses we try to auto-sense
- * Last element MUST BE 0!
- *****************************************************************/
-
-static int addr_list[] __initdata = {0x300, 0x280, 0x310, 0};
-
-/* Dma Memory related stuff */
-
-static unsigned long dma_mem_alloc(int size)
-{
- int order = get_order(size);
- return __get_dma_pages(GFP_KERNEL, order);
-}
-
-
-/*****************************************************************
- *
- * Functions for I/O (note the inline !)
- *
- *****************************************************************/
-
-static inline unsigned char inb_status(unsigned int base_addr)
-{
- return inb(base_addr + PORT_STATUS);
-}
-
-static inline int inb_command(unsigned int base_addr)
-{
- return inb(base_addr + PORT_COMMAND);
-}
-
-static inline void outb_control(unsigned char val, struct net_device *dev)
-{
- outb(val, dev->base_addr + PORT_CONTROL);
- ((elp_device *)(netdev_priv(dev)))->hcr_val = val;
-}
-
-#define HCR_VAL(x) (((elp_device *)(netdev_priv(x)))->hcr_val)
-
-static inline void outb_command(unsigned char val, unsigned int base_addr)
-{
- outb(val, base_addr + PORT_COMMAND);
-}
-
-static inline unsigned int backlog_next(unsigned int n)
-{
- return (n + 1) % BACKLOG_SIZE;
-}
-
-/*****************************************************************
- *
- * useful functions for accessing the adapter
- *
- *****************************************************************/
-
-/*
- * use this routine when accessing the ASF bits as they are
- * changed asynchronously by the adapter
- */
-
-/* get adapter PCB status */
-#define GET_ASF(addr) \
- (get_status(addr)&ASF_PCB_MASK)
-
-static inline int get_status(unsigned int base_addr)
-{
- unsigned long timeout = jiffies + 10*HZ/100;
- register int stat1;
- do {
- stat1 = inb_status(base_addr);
- } while (stat1 != inb_status(base_addr) && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout))
- TIMEOUT_MSG(__LINE__);
- return stat1;
-}
-
-static inline void set_hsf(struct net_device *dev, int hsf)
-{
- elp_device *adapter = netdev_priv(dev);
- unsigned long flags;
-
- spin_lock_irqsave(&adapter->lock, flags);
- outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev);
- spin_unlock_irqrestore(&adapter->lock, flags);
-}
-
-static bool start_receive(struct net_device *, pcb_struct *);
-
-static inline void adapter_reset(struct net_device *dev)
-{
- unsigned long timeout;
- elp_device *adapter = netdev_priv(dev);
- unsigned char orig_hcr = adapter->hcr_val;
-
- outb_control(0, dev);
-
- if (inb_status(dev->base_addr) & ACRF) {
- do {
- inb_command(dev->base_addr);
- timeout = jiffies + 2*HZ/100;
- while (time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF));
- } while (inb_status(dev->base_addr) & ACRF);
- set_hsf(dev, HSF_PCB_NAK);
- }
- outb_control(adapter->hcr_val | ATTN | DIR, dev);
- mdelay(10);
- outb_control(adapter->hcr_val & ~ATTN, dev);
- mdelay(10);
- outb_control(adapter->hcr_val | FLSH, dev);
- mdelay(10);
- outb_control(adapter->hcr_val & ~FLSH, dev);
- mdelay(10);
-
- outb_control(orig_hcr, dev);
- if (!start_receive(dev, &adapter->tx_pcb))
- pr_err("%s: start receive command failed\n", dev->name);
-}
-
-/* Check to make sure that a DMA transfer hasn't timed out. This should
- * never happen in theory, but seems to occur occasionally if the card gets
- * prodded at the wrong time.
- */
-static inline void check_3c505_dma(struct net_device *dev)
-{
- elp_device *adapter = netdev_priv(dev);
- if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) {
- unsigned long flags, f;
- pr_err("%s: DMA %s timed out, %d bytes left\n", dev->name,
- adapter->current_dma.direction ? "download" : "upload",
- get_dma_residue(dev->dma));
- spin_lock_irqsave(&adapter->lock, flags);
- adapter->dmaing = 0;
- adapter->busy = 0;
-
- f=claim_dma_lock();
- disable_dma(dev->dma);
- release_dma_lock(f);
-
- if (adapter->rx_active)
- adapter->rx_active--;
- outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
- spin_unlock_irqrestore(&adapter->lock, flags);
- }
-}
-
-/* Primitive functions used by send_pcb() */
-static inline bool send_pcb_slow(unsigned int base_addr, unsigned char byte)
-{
- unsigned long timeout;
- outb_command(byte, base_addr);
- for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
- if (inb_status(base_addr) & HCRE)
- return false;
- }
- pr_warning("3c505: send_pcb_slow timed out\n");
- return true;
-}
-
-static inline bool send_pcb_fast(unsigned int base_addr, unsigned char byte)
-{
- unsigned int timeout;
- outb_command(byte, base_addr);
- for (timeout = 0; timeout < 40000; timeout++) {
- if (inb_status(base_addr) & HCRE)
- return false;
- }
- pr_warning("3c505: send_pcb_fast timed out\n");
- return true;
-}
-
-/* Check to see if the receiver needs restarting, and kick it if so */
-static inline void prime_rx(struct net_device *dev)
-{
- elp_device *adapter = netdev_priv(dev);
- while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) {
- if (!start_receive(dev, &adapter->itx_pcb))
- break;
- }
-}
-
-/*****************************************************************
- *
- * send_pcb
- * Send a PCB to the adapter.
- *
- * output byte to command reg --<--+
- * wait until HCRE is non zero |
- * loop until all bytes sent -->--+
- * set HSF1 and HSF2 to 1
- * output pcb length
- * wait until ASF give ACK or NAK
- * set HSF1 and HSF2 to 0
- *
- *****************************************************************/
-
-/* This can be quite slow -- the adapter is allowed to take up to 40ms
- * to respond to the initial interrupt.
- *
- * We run initially with interrupts turned on, but with a semaphore set
- * so that nobody tries to re-enter this code. Once the first byte has
- * gone through, we turn interrupts off and then send the others (the
- * timeout is reduced to 500us).
- */
-
-static bool send_pcb(struct net_device *dev, pcb_struct * pcb)
-{
- int i;
- unsigned long timeout;
- elp_device *adapter = netdev_priv(dev);
- unsigned long flags;
-
- check_3c505_dma(dev);
-
- if (adapter->dmaing && adapter->current_dma.direction == 0)
- return false;
-
- /* Avoid contention */
- if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) {
- if (elp_debug >= 3) {
- pr_debug("%s: send_pcb entered while threaded\n", dev->name);
- }
- return false;
- }
- /*
- * load each byte into the command register and
- * wait for the HCRE bit to indicate the adapter
- * had read the byte
- */
- set_hsf(dev, 0);
-
- if (send_pcb_slow(dev->base_addr, pcb->command))
- goto abort;
-
- spin_lock_irqsave(&adapter->lock, flags);
-
- if (send_pcb_fast(dev->base_addr, pcb->length))
- goto sti_abort;
-
- for (i = 0; i < pcb->length; i++) {
- if (send_pcb_fast(dev->base_addr, pcb->data.raw[i]))
- goto sti_abort;
- }
-
- outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */
- outb_command(2 + pcb->length, dev->base_addr);
-
- /* now wait for the acknowledgement */
- spin_unlock_irqrestore(&adapter->lock, flags);
-
- for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
- switch (GET_ASF(dev->base_addr)) {
- case ASF_PCB_ACK:
- adapter->send_pcb_semaphore = 0;
- return true;
-
- case ASF_PCB_NAK:
-#ifdef ELP_DEBUG
- pr_debug("%s: send_pcb got NAK\n", dev->name);
-#endif
- goto abort;
- }
- }
-
- if (elp_debug >= 1)
- pr_debug("%s: timeout waiting for PCB acknowledge (status %02x)\n",
- dev->name, inb_status(dev->base_addr));
- goto abort;
-
- sti_abort:
- spin_unlock_irqrestore(&adapter->lock, flags);
- abort:
- adapter->send_pcb_semaphore = 0;
- return false;
-}
-
-
-/*****************************************************************
- *
- * receive_pcb
- * Read a PCB from the adapter
- *
- * wait for ACRF to be non-zero ---<---+
- * input a byte |
- * if ASF1 and ASF2 were not both one |
- * before byte was read, loop --->---+
- * set HSF1 and HSF2 for ack
- *
- *****************************************************************/
-
-static bool receive_pcb(struct net_device *dev, pcb_struct * pcb)
-{
- int i, j;
- int total_length;
- int stat;
- unsigned long timeout;
- unsigned long flags;
-
- elp_device *adapter = netdev_priv(dev);
-
- set_hsf(dev, 0);
-
- /* get the command code */
- timeout = jiffies + 2*HZ/100;
- while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout)) {
- TIMEOUT_MSG(__LINE__);
- return false;
- }
- pcb->command = inb_command(dev->base_addr);
-
- /* read the data length */
- timeout = jiffies + 3*HZ/100;
- while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout)) {
- TIMEOUT_MSG(__LINE__);
- pr_info("%s: status %02x\n", dev->name, stat);
- return false;
- }
- pcb->length = inb_command(dev->base_addr);
-
- if (pcb->length > MAX_PCB_DATA) {
- INVALID_PCB_MSG(pcb->length);
- adapter_reset(dev);
- return false;
- }
- /* read the data */
- spin_lock_irqsave(&adapter->lock, flags);
- for (i = 0; i < MAX_PCB_DATA; i++) {
- for (j = 0; j < 20000; j++) {
- stat = get_status(dev->base_addr);
- if (stat & ACRF)
- break;
- }
- pcb->data.raw[i] = inb_command(dev->base_addr);
- if ((stat & ASF_PCB_MASK) == ASF_PCB_END || j >= 20000)
- break;
- }
- spin_unlock_irqrestore(&adapter->lock, flags);
- if (i >= MAX_PCB_DATA) {
- INVALID_PCB_MSG(i);
- return false;
- }
- if (j >= 20000) {
- TIMEOUT_MSG(__LINE__);
- return false;
- }
- /* the last "data" byte was really the length! */
- total_length = pcb->data.raw[i];
-
- /* safety check total length vs data length */
- if (total_length != (pcb->length + 2)) {
- if (elp_debug >= 2)
- pr_warning("%s: mangled PCB received\n", dev->name);
- set_hsf(dev, HSF_PCB_NAK);
- return false;
- }
-
- if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) {
- if (test_and_set_bit(0, (void *) &adapter->busy)) {
- if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) {
- set_hsf(dev, HSF_PCB_NAK);
- pr_warning("%s: PCB rejected, transfer in progress and backlog full\n", dev->name);
- pcb->command = 0;
- return true;
- } else {
- pcb->command = 0xff;
- }
- }
- }
- set_hsf(dev, HSF_PCB_ACK);
- return true;
-}
-
-/******************************************************
- *
- * queue a receive command on the adapter so we will get an
- * interrupt when a packet is received.
- *
- ******************************************************/
-
-static bool start_receive(struct net_device *dev, pcb_struct * tx_pcb)
-{
- bool status;
- elp_device *adapter = netdev_priv(dev);
-
- if (elp_debug >= 3)
- pr_debug("%s: restarting receiver\n", dev->name);
- tx_pcb->command = CMD_RECEIVE_PACKET;
- tx_pcb->length = sizeof(struct Rcv_pkt);
- tx_pcb->data.rcv_pkt.buf_seg
- = tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */
- tx_pcb->data.rcv_pkt.buf_len = 1600;
- tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */
- status = send_pcb(dev, tx_pcb);
- if (status)
- adapter->rx_active++;
- return status;
-}
-
-/******************************************************
- *
- * extract a packet from the adapter
- * this routine is only called from within the interrupt
- * service routine, so no cli/sti calls are needed
- * note that the length is always assumed to be even
- *
- ******************************************************/
-
-static void receive_packet(struct net_device *dev, int len)
-{
- int rlen;
- elp_device *adapter = netdev_priv(dev);
- void *target;
- struct sk_buff *skb;
- unsigned long flags;
-
- rlen = (len + 1) & ~1;
- skb = netdev_alloc_skb(dev, rlen + 2);
-
- if (!skb) {
- pr_warning("%s: memory squeeze, dropping packet\n", dev->name);
- target = adapter->dma_buffer;
- adapter->current_dma.target = NULL;
- /* FIXME: stats */
- return;
- }
-
- skb_reserve(skb, 2);
- target = skb_put(skb, rlen);
- if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) {
- adapter->current_dma.target = target;
- target = adapter->dma_buffer;
- } else {
- adapter->current_dma.target = NULL;
- }
-
- /* if this happens, we die */
- if (test_and_set_bit(0, (void *) &adapter->dmaing))
- pr_err("%s: rx blocked, DMA in progress, dir %d\n",
- dev->name, adapter->current_dma.direction);
-
- adapter->current_dma.direction = 0;
- adapter->current_dma.length = rlen;
- adapter->current_dma.skb = skb;
- adapter->current_dma.start_time = jiffies;
-
- outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev);
-
- flags=claim_dma_lock();
- disable_dma(dev->dma);
- clear_dma_ff(dev->dma);
- set_dma_mode(dev->dma, 0x04); /* dma read */
- set_dma_addr(dev->dma, isa_virt_to_bus(target));
- set_dma_count(dev->dma, rlen);
- enable_dma(dev->dma);
- release_dma_lock(flags);
-
- if (elp_debug >= 3) {
- pr_debug("%s: rx DMA transfer started\n", dev->name);
- }
-
- if (adapter->rx_active)
- adapter->rx_active--;
-
- if (!adapter->busy)
- pr_warning("%s: receive_packet called, busy not set.\n", dev->name);
-}
-
-/******************************************************
- *
- * interrupt handler
- *
- ******************************************************/
-
-static irqreturn_t elp_interrupt(int irq, void *dev_id)
-{
- int len;
- int dlen;
- int icount = 0;
- struct net_device *dev = dev_id;
- elp_device *adapter = netdev_priv(dev);
- unsigned long timeout;
-
- spin_lock(&adapter->lock);
-
- do {
- /*
- * has a DMA transfer finished?
- */
- if (inb_status(dev->base_addr) & DONE) {
- if (!adapter->dmaing)
- pr_warning("%s: phantom DMA completed\n", dev->name);
-
- if (elp_debug >= 3)
- pr_debug("%s: %s DMA complete, status %02x\n", dev->name,
- adapter->current_dma.direction ? "tx" : "rx",
- inb_status(dev->base_addr));
-
- outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
- if (adapter->current_dma.direction) {
- dev_kfree_skb_irq(adapter->current_dma.skb);
- } else {
- struct sk_buff *skb = adapter->current_dma.skb;
- if (skb) {
- if (adapter->current_dma.target) {
- /* have already done the skb_put() */
- memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length);
- }
- skb->protocol = eth_type_trans(skb,dev);
- dev->stats.rx_bytes += skb->len;
- netif_rx(skb);
- }
- }
- adapter->dmaing = 0;
- if (adapter->rx_backlog.in != adapter->rx_backlog.out) {
- int t = adapter->rx_backlog.length[adapter->rx_backlog.out];
- adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out);
- if (elp_debug >= 2)
- pr_debug("%s: receiving backlogged packet (%d)\n", dev->name, t);
- receive_packet(dev, t);
- } else {
- adapter->busy = 0;
- }
- } else {
- /* has one timed out? */
- check_3c505_dma(dev);
- }
-
- /*
- * receive a PCB from the adapter
- */
- timeout = jiffies + 3*HZ/100;
- while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) {
- if (receive_pcb(dev, &adapter->irx_pcb)) {
- switch (adapter->irx_pcb.command)
- {
- case 0:
- break;
- /*
- * received a packet - this must be handled fast
- */
- case 0xff:
- case CMD_RECEIVE_PACKET_COMPLETE:
- /* if the device isn't open, don't pass packets up the stack */
- if (!netif_running(dev))
- break;
- len = adapter->irx_pcb.data.rcv_resp.pkt_len;
- dlen = adapter->irx_pcb.data.rcv_resp.buf_len;
- if (adapter->irx_pcb.data.rcv_resp.timeout != 0) {
- pr_err("%s: interrupt - packet not received correctly\n", dev->name);
- } else {
- if (elp_debug >= 3) {
- pr_debug("%s: interrupt - packet received of length %i (%i)\n",
- dev->name, len, dlen);
- }
- if (adapter->irx_pcb.command == 0xff) {
- if (elp_debug >= 2)
- pr_debug("%s: adding packet to backlog (len = %d)\n",
- dev->name, dlen);
- adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen;
- adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in);
- } else {
- receive_packet(dev, dlen);
- }
- if (elp_debug >= 3)
- pr_debug("%s: packet received\n", dev->name);
- }
- break;
-
- /*
- * 82586 configured correctly
- */
- case CMD_CONFIGURE_82586_RESPONSE:
- adapter->got[CMD_CONFIGURE_82586] = 1;
- if (elp_debug >= 3)
- pr_debug("%s: interrupt - configure response received\n", dev->name);
- break;
-
- /*
- * Adapter memory configuration
- */
- case CMD_CONFIGURE_ADAPTER_RESPONSE:
- adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1;
- if (elp_debug >= 3)
- pr_debug("%s: Adapter memory configuration %s.\n", dev->name,
- adapter->irx_pcb.data.failed ? "failed" : "succeeded");
- break;
-
- /*
- * Multicast list loading
- */
- case CMD_LOAD_MULTICAST_RESPONSE:
- adapter->got[CMD_LOAD_MULTICAST_LIST] = 1;
- if (elp_debug >= 3)
- pr_debug("%s: Multicast address list loading %s.\n", dev->name,
- adapter->irx_pcb.data.failed ? "failed" : "succeeded");
- break;
-
- /*
- * Station address setting
- */
- case CMD_SET_ADDRESS_RESPONSE:
- adapter->got[CMD_SET_STATION_ADDRESS] = 1;
- if (elp_debug >= 3)
- pr_debug("%s: Ethernet address setting %s.\n", dev->name,
- adapter->irx_pcb.data.failed ? "failed" : "succeeded");
- break;
-
-
- /*
- * received board statistics
- */
- case CMD_NETWORK_STATISTICS_RESPONSE:
- dev->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv;
- dev->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit;
- dev->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC;
- dev->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align;
- dev->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun;
- dev->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res;
- adapter->got[CMD_NETWORK_STATISTICS] = 1;
- if (elp_debug >= 3)
- pr_debug("%s: interrupt - statistics response received\n", dev->name);
- break;
-
- /*
- * sent a packet
- */
- case CMD_TRANSMIT_PACKET_COMPLETE:
- if (elp_debug >= 3)
- pr_debug("%s: interrupt - packet sent\n", dev->name);
- if (!netif_running(dev))
- break;
- switch (adapter->irx_pcb.data.xmit_resp.c_stat) {
- case 0xffff:
- dev->stats.tx_aborted_errors++;
- pr_info("%s: transmit timed out, network cable problem?\n", dev->name);
- break;
- case 0xfffe:
- dev->stats.tx_fifo_errors++;
- pr_info("%s: transmit timed out, FIFO underrun\n", dev->name);
- break;
- }
- netif_wake_queue(dev);
- break;
-
- /*
- * some unknown PCB
- */
- default:
- pr_debug("%s: unknown PCB received - %2.2x\n",
- dev->name, adapter->irx_pcb.command);
- break;
- }
- } else {
- pr_warning("%s: failed to read PCB on interrupt\n", dev->name);
- adapter_reset(dev);
- }
- }
-
- } while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE)));
-
- prime_rx(dev);
-
- /*
- * indicate no longer in interrupt routine
- */
- spin_unlock(&adapter->lock);
- return IRQ_HANDLED;
-}
-
-
-/******************************************************
- *
- * open the board
- *
- ******************************************************/
-
-static int elp_open(struct net_device *dev)
-{
- elp_device *adapter = netdev_priv(dev);
- int retval;
-
- if (elp_debug >= 3)
- pr_debug("%s: request to open device\n", dev->name);
-
- /*
- * make sure we actually found the device
- */
- if (adapter == NULL) {
- pr_err("%s: Opening a non-existent physical device\n", dev->name);
- return -EAGAIN;
- }
- /*
- * disable interrupts on the board
- */
- outb_control(0, dev);
-
- /*
- * clear any pending interrupts
- */
- inb_command(dev->base_addr);
- adapter_reset(dev);
-
- /*
- * no receive PCBs active
- */
- adapter->rx_active = 0;
-
- adapter->busy = 0;
- adapter->send_pcb_semaphore = 0;
- adapter->rx_backlog.in = 0;
- adapter->rx_backlog.out = 0;
-
- spin_lock_init(&adapter->lock);
-
- /*
- * install our interrupt service routine
- */
- if ((retval = request_irq(dev->irq, elp_interrupt, 0, dev->name, dev))) {
- pr_err("%s: could not allocate IRQ%d\n", dev->name, dev->irq);
- return retval;
- }
- if ((retval = request_dma(dev->dma, dev->name))) {
- free_irq(dev->irq, dev);
- pr_err("%s: could not allocate DMA%d channel\n", dev->name, dev->dma);
- return retval;
- }
- adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE);
- if (!adapter->dma_buffer) {
- pr_err("%s: could not allocate DMA buffer\n", dev->name);
- free_dma(dev->dma);
- free_irq(dev->irq, dev);
- return -ENOMEM;
- }
- adapter->dmaing = 0;
-
- /*
- * enable interrupts on the board
- */
- outb_control(CMDE, dev);
-
- /*
- * configure adapter memory: we need 10 multicast addresses, default==0
- */
- if (elp_debug >= 3)
- pr_debug("%s: sending 3c505 memory configuration command\n", dev->name);
- adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
- adapter->tx_pcb.data.memconf.cmd_q = 10;
- adapter->tx_pcb.data.memconf.rcv_q = 20;
- adapter->tx_pcb.data.memconf.mcast = 10;
- adapter->tx_pcb.data.memconf.frame = 20;
- adapter->tx_pcb.data.memconf.rcv_b = 20;
- adapter->tx_pcb.data.memconf.progs = 0;
- adapter->tx_pcb.length = sizeof(struct Memconf);
- adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0;
- if (!send_pcb(dev, &adapter->tx_pcb))
- pr_err("%s: couldn't send memory configuration command\n", dev->name);
- else {
- unsigned long timeout = jiffies + TIMEOUT;
- while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout))
- TIMEOUT_MSG(__LINE__);
- }
-
-
- /*
- * configure adapter to receive broadcast messages and wait for response
- */
- if (elp_debug >= 3)
- pr_debug("%s: sending 82586 configure command\n", dev->name);
- adapter->tx_pcb.command = CMD_CONFIGURE_82586;
- adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
- adapter->tx_pcb.length = 2;
- adapter->got[CMD_CONFIGURE_82586] = 0;
- if (!send_pcb(dev, &adapter->tx_pcb))
- pr_err("%s: couldn't send 82586 configure command\n", dev->name);
- else {
- unsigned long timeout = jiffies + TIMEOUT;
- while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout))
- TIMEOUT_MSG(__LINE__);
- }
-
- /* enable burst-mode DMA */
- /* outb(0x1, dev->base_addr + PORT_AUXDMA); */
-
- /*
- * queue receive commands to provide buffering
- */
- prime_rx(dev);
- if (elp_debug >= 3)
- pr_debug("%s: %d receive PCBs active\n", dev->name, adapter->rx_active);
-
- /*
- * device is now officially open!
- */
-
- netif_start_queue(dev);
- return 0;
-}
-
-
-/******************************************************
- *
- * send a packet to the adapter
- *
- ******************************************************/
-
-static netdev_tx_t send_packet(struct net_device *dev, struct sk_buff *skb)
-{
- elp_device *adapter = netdev_priv(dev);
- unsigned long target;
- unsigned long flags;
-
- /*
- * make sure the length is even and no shorter than 60 bytes
- */
- unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1);
-
- if (test_and_set_bit(0, (void *) &adapter->busy)) {
- if (elp_debug >= 2)
- pr_debug("%s: transmit blocked\n", dev->name);
- return false;
- }
-
- dev->stats.tx_bytes += nlen;
-
- /*
- * send the adapter a transmit packet command. Ignore segment and offset
- * and make sure the length is even
- */
- adapter->tx_pcb.command = CMD_TRANSMIT_PACKET;
- adapter->tx_pcb.length = sizeof(struct Xmit_pkt);
- adapter->tx_pcb.data.xmit_pkt.buf_ofs
- = adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */
- adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen;
-
- if (!send_pcb(dev, &adapter->tx_pcb)) {
- adapter->busy = 0;
- return false;
- }
- /* if this happens, we die */
- if (test_and_set_bit(0, (void *) &adapter->dmaing))
- pr_debug("%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction);
-
- adapter->current_dma.direction = 1;
- adapter->current_dma.start_time = jiffies;
-
- if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) {
- skb_copy_from_linear_data(skb, adapter->dma_buffer, nlen);
- memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len);
- target = isa_virt_to_bus(adapter->dma_buffer);
- }
- else {
- target = isa_virt_to_bus(skb->data);
- }
- adapter->current_dma.skb = skb;
-
- flags=claim_dma_lock();
- disable_dma(dev->dma);
- clear_dma_ff(dev->dma);
- set_dma_mode(dev->dma, 0x48); /* dma memory -> io */
- set_dma_addr(dev->dma, target);
- set_dma_count(dev->dma, nlen);
- outb_control(adapter->hcr_val | DMAE | TCEN, dev);
- enable_dma(dev->dma);
- release_dma_lock(flags);
-
- if (elp_debug >= 3)
- pr_debug("%s: DMA transfer started\n", dev->name);
-
- return true;
-}
-
-/*
- * The upper layer thinks we timed out
- */
-
-static void elp_timeout(struct net_device *dev)
-{
- int stat;
-
- stat = inb_status(dev->base_addr);
- pr_warning("%s: transmit timed out, lost %s?\n", dev->name,
- (stat & ACRF) ? "interrupt" : "command");
- if (elp_debug >= 1)
- pr_debug("%s: status %#02x\n", dev->name, stat);
- dev->trans_start = jiffies; /* prevent tx timeout */
- dev->stats.tx_dropped++;
- netif_wake_queue(dev);
-}
-
-/******************************************************
- *
- * start the transmitter
- * return 0 if sent OK, else return 1
- *
- ******************************************************/
-
-static netdev_tx_t elp_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- unsigned long flags;
- elp_device *adapter = netdev_priv(dev);
-
- spin_lock_irqsave(&adapter->lock, flags);
- check_3c505_dma(dev);
-
- if (elp_debug >= 3)
- pr_debug("%s: request to send packet of length %d\n", dev->name, (int) skb->len);
-
- netif_stop_queue(dev);
-
- /*
- * send the packet at skb->data for skb->len
- */
- if (!send_packet(dev, skb)) {
- if (elp_debug >= 2) {
- pr_debug("%s: failed to transmit packet\n", dev->name);
- }
- spin_unlock_irqrestore(&adapter->lock, flags);
- return NETDEV_TX_BUSY;
- }
- if (elp_debug >= 3)
- pr_debug("%s: packet of length %d sent\n", dev->name, (int) skb->len);
-
- prime_rx(dev);
- spin_unlock_irqrestore(&adapter->lock, flags);
- netif_start_queue(dev);
- return NETDEV_TX_OK;
-}
-
-/******************************************************
- *
- * return statistics on the board
- *
- ******************************************************/
-
-static struct net_device_stats *elp_get_stats(struct net_device *dev)
-{
- elp_device *adapter = netdev_priv(dev);
-
- if (elp_debug >= 3)
- pr_debug("%s: request for stats\n", dev->name);
-
- /* If the device is closed, just return the latest stats we have,
- - we cannot ask from the adapter without interrupts */
- if (!netif_running(dev))
- return &dev->stats;
-
- /* send a get statistics command to the board */
- adapter->tx_pcb.command = CMD_NETWORK_STATISTICS;
- adapter->tx_pcb.length = 0;
- adapter->got[CMD_NETWORK_STATISTICS] = 0;
- if (!send_pcb(dev, &adapter->tx_pcb))
- pr_err("%s: couldn't send get statistics command\n", dev->name);
- else {
- unsigned long timeout = jiffies + TIMEOUT;
- while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout)) {
- TIMEOUT_MSG(__LINE__);
- return &dev->stats;
- }
- }
-
- /* statistics are now up to date */
- return &dev->stats;
-}
-
-
-static void netdev_get_drvinfo(struct net_device *dev,
- struct ethtool_drvinfo *info)
-{
- strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
- strlcpy(info->version, DRV_VERSION, sizeof(info->version));
- snprintf(info->bus_info, sizeof(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,
-};
-
-/******************************************************
- *
- * close the board
- *
- ******************************************************/
-
-static int elp_close(struct net_device *dev)
-{
- elp_device *adapter = netdev_priv(dev);
-
- if (elp_debug >= 3)
- pr_debug("%s: request to close device\n", dev->name);
-
- netif_stop_queue(dev);
-
- /* Someone may request the device statistic information even when
- * the interface is closed. The following will update the statistics
- * structure in the driver, so we'll be able to give current statistics.
- */
- (void) elp_get_stats(dev);
-
- /*
- * disable interrupts on the board
- */
- outb_control(0, dev);
-
- /*
- * release the IRQ
- */
- free_irq(dev->irq, dev);
-
- free_dma(dev->dma);
- free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE));
-
- return 0;
-}
-
-
-/************************************************************
- *
- * Set multicast list
- * num_addrs==0: clear mc_list
- * num_addrs==-1: set promiscuous mode
- * num_addrs>0: set mc_list
- *
- ************************************************************/
-
-static void elp_set_mc_list(struct net_device *dev)
-{
- elp_device *adapter = netdev_priv(dev);
- struct netdev_hw_addr *ha;
- int i;
- unsigned long flags;
-
- if (elp_debug >= 3)
- pr_debug("%s: request to set multicast list\n", dev->name);
-
- spin_lock_irqsave(&adapter->lock, flags);
-
- if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
- /* send a "load multicast list" command to the board, max 10 addrs/cmd */
- /* if num_addrs==0 the list will be cleared */
- adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST;
- adapter->tx_pcb.length = 6 * netdev_mc_count(dev);
- i = 0;
- netdev_for_each_mc_addr(ha, dev)
- memcpy(adapter->tx_pcb.data.multicast[i++],
- ha->addr, 6);
- adapter->got[CMD_LOAD_MULTICAST_LIST] = 0;
- if (!send_pcb(dev, &adapter->tx_pcb))
- pr_err("%s: couldn't send set_multicast command\n", dev->name);
- else {
- unsigned long timeout = jiffies + TIMEOUT;
- while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout)) {
- TIMEOUT_MSG(__LINE__);
- }
- }
- if (!netdev_mc_empty(dev))
- adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI;
- else /* num_addrs == 0 */
- adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
- } else
- adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC;
- /*
- * configure adapter to receive messages (as specified above)
- * and wait for response
- */
- if (elp_debug >= 3)
- pr_debug("%s: sending 82586 configure command\n", dev->name);
- adapter->tx_pcb.command = CMD_CONFIGURE_82586;
- adapter->tx_pcb.length = 2;
- adapter->got[CMD_CONFIGURE_82586] = 0;
- if (!send_pcb(dev, &adapter->tx_pcb))
- {
- spin_unlock_irqrestore(&adapter->lock, flags);
- pr_err("%s: couldn't send 82586 configure command\n", dev->name);
- }
- else {
- unsigned long timeout = jiffies + TIMEOUT;
- spin_unlock_irqrestore(&adapter->lock, flags);
- while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
- if (time_after_eq(jiffies, timeout))
- TIMEOUT_MSG(__LINE__);
- }
-}
-
-/************************************************************
- *
- * A couple of tests to see if there's 3C505 or not
- * Called only by elp_autodetect
- ************************************************************/
-
-static int __init elp_sense(struct net_device *dev)
-{
- int addr = dev->base_addr;
- const char *name = dev->name;
- byte orig_HSR;
-
- if (!request_region(addr, ELP_IO_EXTENT, "3c505"))
- return -ENODEV;
-
- orig_HSR = inb_status(addr);
-
- if (elp_debug > 0)
- pr_debug(search_msg, name, addr);
-
- if (orig_HSR == 0xff) {
- if (elp_debug > 0)
- pr_cont(notfound_msg, 1);
- goto out;
- }
-
- /* Wait for a while; the adapter may still be booting up */
- if (elp_debug > 0)
- pr_cont(stilllooking_msg);
-
- if (orig_HSR & DIR) {
- /* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */
- outb(0, dev->base_addr + PORT_CONTROL);
- msleep(300);
- if (inb_status(addr) & DIR) {
- if (elp_debug > 0)
- pr_cont(notfound_msg, 2);
- goto out;
- }
- } else {
- /* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */
- outb(DIR, dev->base_addr + PORT_CONTROL);
- msleep(300);
- if (!(inb_status(addr) & DIR)) {
- if (elp_debug > 0)
- pr_cont(notfound_msg, 3);
- goto out;
- }
- }
- /*
- * It certainly looks like a 3c505.
- */
- if (elp_debug > 0)
- pr_cont(found_msg);
-
- return 0;
-out:
- release_region(addr, ELP_IO_EXTENT);
- return -ENODEV;
-}
-
-/*************************************************************
- *
- * Search through addr_list[] and try to find a 3C505
- * Called only by eplus_probe
- *************************************************************/
-
-static int __init elp_autodetect(struct net_device *dev)
-{
- int idx = 0;
-
- /* if base address set, then only check that address
- otherwise, run through the table */
- if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */
- if (elp_sense(dev) == 0)
- return dev->base_addr;
- } else
- while ((dev->base_addr = addr_list[idx++])) {
- if (elp_sense(dev) == 0)
- return dev->base_addr;
- }
-
- /* could not find an adapter */
- if (elp_debug > 0)
- pr_debug(couldnot_msg, dev->name);
-
- return 0; /* Because of this, the layer above will return -ENODEV */
-}
-
-static const struct net_device_ops elp_netdev_ops = {
- .ndo_open = elp_open,
- .ndo_stop = elp_close,
- .ndo_get_stats = elp_get_stats,
- .ndo_start_xmit = elp_start_xmit,
- .ndo_tx_timeout = elp_timeout,
- .ndo_set_rx_mode = elp_set_mc_list,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-/******************************************************
- *
- * probe for an Etherlink Plus board at the specified address
- *
- ******************************************************/
-
-/* There are three situations we need to be able to detect here:
-
- * a) the card is idle
- * b) the card is still booting up
- * c) the card is stuck in a strange state (some DOS drivers do this)
- *
- * In case (a), all is well. In case (b), we wait 10 seconds to see if the
- * card finishes booting, and carry on if so. In case (c), we do a hard reset,
- * loop round, and hope for the best.
- *
- * This is all very unpleasant, but hopefully avoids the problems with the old
- * probe code (which had a 15-second delay if the card was idle, and didn't
- * work at all if it was in a weird state).
- */
-
-static int __init elplus_setup(struct net_device *dev)
-{
- elp_device *adapter = netdev_priv(dev);
- int i, tries, tries1, okay;
- unsigned long timeout;
- unsigned long cookie = 0;
- int err = -ENODEV;
-
- /*
- * setup adapter structure
- */
-
- dev->base_addr = elp_autodetect(dev);
- if (!dev->base_addr)
- return -ENODEV;
-
- adapter->send_pcb_semaphore = 0;
-
- for (tries1 = 0; tries1 < 3; tries1++) {
- outb_control((adapter->hcr_val | CMDE) & ~DIR, dev);
- /* First try to write just one byte, to see if the card is
- * responding at all normally.
- */
- timeout = jiffies + 5*HZ/100;
- okay = 0;
- while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
- if ((inb_status(dev->base_addr) & HCRE)) {
- outb_command(0, dev->base_addr); /* send a spurious byte */
- timeout = jiffies + 5*HZ/100;
- while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
- if (inb_status(dev->base_addr) & HCRE)
- okay = 1;
- }
- if (!okay) {
- /* Nope, it's ignoring the command register. This means that
- * either it's still booting up, or it's died.
- */
- pr_err("%s: command register wouldn't drain, ", dev->name);
- if ((inb_status(dev->base_addr) & 7) == 3) {
- /* If the adapter status is 3, it *could* still be booting.
- * Give it the benefit of the doubt for 10 seconds.
- */
- pr_cont("assuming 3c505 still starting\n");
- timeout = jiffies + 10*HZ;
- while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7));
- if (inb_status(dev->base_addr) & 7) {
- pr_err("%s: 3c505 failed to start\n", dev->name);
- } else {
- okay = 1; /* It started */
- }
- } else {
- /* Otherwise, it must just be in a strange
- * state. We probably need to kick it.
- */
- pr_cont("3c505 is sulking\n");
- }
- }
- for (tries = 0; tries < 5 && okay; tries++) {
-
- /*
- * Try to set the Ethernet address, to make sure that the board
- * is working.
- */
- adapter->tx_pcb.command = CMD_STATION_ADDRESS;
- adapter->tx_pcb.length = 0;
- cookie = probe_irq_on();
- if (!send_pcb(dev, &adapter->tx_pcb)) {
- pr_err("%s: could not send first PCB\n", dev->name);
- probe_irq_off(cookie);
- continue;
- }
- if (!receive_pcb(dev, &adapter->rx_pcb)) {
- pr_err("%s: could not read first PCB\n", dev->name);
- probe_irq_off(cookie);
- continue;
- }
- if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) ||
- (adapter->rx_pcb.length != 6)) {
- pr_err("%s: first PCB wrong (%d, %d)\n", dev->name,
- adapter->rx_pcb.command, adapter->rx_pcb.length);
- probe_irq_off(cookie);
- continue;
- }
- goto okay;
- }
- /* It's broken. Do a hard reset to re-initialise the board,
- * and try again.
- */
- pr_info("%s: resetting adapter\n", dev->name);
- outb_control(adapter->hcr_val | FLSH | ATTN, dev);
- outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev);
- }
- pr_err("%s: failed to initialise 3c505\n", dev->name);
- goto out;
-
- okay:
- if (dev->irq) { /* Is there a preset IRQ? */
- int rpt = probe_irq_off(cookie);
- if (dev->irq != rpt) {
- pr_warning("%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt);
- }
- /* if dev->irq == probe_irq_off(cookie), all is well */
- } else /* No preset IRQ; just use what we can detect */
- dev->irq = probe_irq_off(cookie);
- switch (dev->irq) { /* Legal, sane? */
- case 0:
- pr_err("%s: IRQ probe failed: check 3c505 jumpers.\n",
- dev->name);
- goto out;
- case 1:
- case 6:
- case 8:
- case 13:
- pr_err("%s: Impossible IRQ %d reported by probe_irq_off().\n",
- dev->name, dev->irq);
- goto out;
- }
- /*
- * Now we have the IRQ number so we can disable the interrupts from
- * the board until the board is opened.
- */
- outb_control(adapter->hcr_val & ~CMDE, dev);
-
- /*
- * copy Ethernet address into structure
- */
- for (i = 0; i < 6; i++)
- dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i];
-
- /* find a DMA channel */
- if (!dev->dma) {
- if (dev->mem_start) {
- dev->dma = dev->mem_start & 7;
- }
- else {
- pr_warning("%s: warning, DMA channel not specified, using default\n", dev->name);
- dev->dma = ELP_DMA;
- }
- }
-
- /*
- * print remainder of startup message
- */
- pr_info("%s: 3c505 at %#lx, irq %d, dma %d, addr %pM, ",
- dev->name, dev->base_addr, dev->irq, dev->dma, dev->dev_addr);
- /*
- * read more information from the adapter
- */
-
- adapter->tx_pcb.command = CMD_ADAPTER_INFO;
- adapter->tx_pcb.length = 0;
- if (!send_pcb(dev, &adapter->tx_pcb) ||
- !receive_pcb(dev, &adapter->rx_pcb) ||
- (adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) ||
- (adapter->rx_pcb.length != 10)) {
- pr_cont("not responding to second PCB\n");
- }
- pr_cont("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers,
- adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz);
-
- /*
- * reconfigure the adapter memory to better suit our purposes
- */
- adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
- adapter->tx_pcb.length = 12;
- adapter->tx_pcb.data.memconf.cmd_q = 8;
- adapter->tx_pcb.data.memconf.rcv_q = 8;
- adapter->tx_pcb.data.memconf.mcast = 10;
- adapter->tx_pcb.data.memconf.frame = 10;
- adapter->tx_pcb.data.memconf.rcv_b = 10;
- adapter->tx_pcb.data.memconf.progs = 0;
- if (!send_pcb(dev, &adapter->tx_pcb) ||
- !receive_pcb(dev, &adapter->rx_pcb) ||
- (adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) ||
- (adapter->rx_pcb.length != 2)) {
- pr_err("%s: could not configure adapter memory\n", dev->name);
- }
- if (adapter->rx_pcb.data.configure) {
- pr_err("%s: adapter configuration failed\n", dev->name);
- }
-
- dev->netdev_ops = &elp_netdev_ops;
- dev->watchdog_timeo = 10*HZ;
- dev->ethtool_ops = &netdev_ethtool_ops; /* local */
-
- dev->mem_start = dev->mem_end = 0;
-
- err = register_netdev(dev);
- if (err)
- goto out;
-
- return 0;
-out:
- release_region(dev->base_addr, ELP_IO_EXTENT);
- return err;
-}
-
-#ifndef MODULE
-struct net_device * __init elplus_probe(int unit)
-{
- struct net_device *dev = alloc_etherdev(sizeof(elp_device));
- int err;
- if (!dev)
- return ERR_PTR(-ENOMEM);
-
- sprintf(dev->name, "eth%d", unit);
- netdev_boot_setup_check(dev);
-
- err = elplus_setup(dev);
- if (err) {
- free_netdev(dev);
- return ERR_PTR(err);
- }
- return dev;
-}
-
-#else
-static struct net_device *dev_3c505[ELP_MAX_CARDS];
-static int io[ELP_MAX_CARDS];
-static int irq[ELP_MAX_CARDS];
-static int dma[ELP_MAX_CARDS];
-module_param_array(io, int, NULL, 0);
-module_param_array(irq, int, NULL, 0);
-module_param_array(dma, int, NULL, 0);
-MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)");
-MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)");
-MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)");
-
-int __init init_module(void)
-{
- int this_dev, found = 0;
-
- for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
- struct net_device *dev = alloc_etherdev(sizeof(elp_device));
- if (!dev)
- break;
-
- dev->irq = irq[this_dev];
- dev->base_addr = io[this_dev];
- if (dma[this_dev]) {
- dev->dma = dma[this_dev];
- } else {
- dev->dma = ELP_DMA;
- pr_warning("3c505.c: warning, using default DMA channel,\n");
- }
- if (io[this_dev] == 0) {
- if (this_dev) {
- free_netdev(dev);
- break;
- }
- pr_notice("3c505.c: module autoprobe not recommended, give io=xx.\n");
- }
- if (elplus_setup(dev) != 0) {
- pr_warning("3c505.c: Failed to register card at 0x%x.\n", io[this_dev]);
- free_netdev(dev);
- break;
- }
- dev_3c505[this_dev] = dev;
- found++;
- }
- if (!found)
- return -ENODEV;
- return 0;
-}
-
-void __exit cleanup_module(void)
-{
- int this_dev;
-
- for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
- struct net_device *dev = dev_3c505[this_dev];
- if (dev) {
- unregister_netdev(dev);
- release_region(dev->base_addr, ELP_IO_EXTENT);
- free_netdev(dev);
- }
- }
-}
-
-#endif /* MODULE */
-MODULE_LICENSE("GPL");
+++ /dev/null
-/* 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)
-{
- strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
- strlcpy(info->version, DRV_VERSION, sizeof(info->version));
- snprintf(info->bus_info, sizeof(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");
projects / linux-beck.git / commitdiff