--- /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 filename __FILE__
+
+#define timeout_msg "*** timeout at %s:%s (line %d) ***\n"
+#define TIMEOUT_MSG(lineno) \
+ pr_notice(timeout_msg, filename, __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), filename, __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 = dev_alloc_skb(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)
+{
+ 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,
+};
+
+/******************************************************
+ *
+ * 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_multicast_list = 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");
git.openpandora.org / pandora-kernel.git / blobdiff