de620.c
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上传日期:2013-04-10
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- /*
- * de620.c $Revision: 1.40 $ BETA
- *
- *
- * Linux driver for the D-Link DE-620 Ethernet pocket adapter.
- *
- * Portions (C) Copyright 1993, 1994 by Bjorn Ekwall <bj0rn@blox.se>
- *
- * Based on adapter information gathered from DOS packetdriver
- * sources from D-Link Inc: (Special thanks to Henry Ngai of D-Link.)
- * Portions (C) Copyright D-Link SYSTEM Inc. 1991, 1992
- * Copyright, 1988, Russell Nelson, Crynwr Software
- *
- * Adapted to the sample network driver core for linux,
- * written by: Donald Becker <becker@super.org>
- * (Now at <becker@scyld.com>)
- *
- * Valuable assistance from:
- * J. Joshua Kopper <kopper@rtsg.mot.com>
- * Olav Kvittem <Olav.Kvittem@uninett.no>
- * Germano Caronni <caronni@nessie.cs.id.ethz.ch>
- * Jeremy Fitzhardinge <jeremy@suite.sw.oz.au>
- *
- *****************************************************************************/
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *****************************************************************************/
- static const char version[] =
- "de620.c: $Revision: 1.40 $, Bjorn Ekwall <bj0rn@blox.se>n";
- /***********************************************************************
- *
- * "Tuning" section.
- *
- * Compile-time options: (see below for descriptions)
- * -DDE620_IO=0x378 (lpt1)
- * -DDE620_IRQ=7 (lpt1)
- * -DDE602_DEBUG=...
- * -DSHUTDOWN_WHEN_LOST
- * -DCOUNT_LOOPS
- * -DLOWSPEED
- * -DREAD_DELAY
- * -DWRITE_DELAY
- */
- /*
- * This driver assumes that the printer port is a "normal",
- * dumb, uni-directional port!
- * If your port is "fancy" in any way, please try to set it to "normal"
- * with your BIOS setup. I have no access to machines with bi-directional
- * ports, so I can't test such a driver :-(
- * (Yes, I _know_ it is possible to use DE620 with bidirectional ports...)
- *
- * There are some clones of DE620 out there, with different names.
- * If the current driver does not recognize a clone, try to change
- * the following #define to:
- *
- * #define DE620_CLONE 1
- */
- #define DE620_CLONE 0
- /*
- * If the adapter has problems with high speeds, enable this #define
- * otherwise full printerport speed will be attempted.
- *
- * You can tune the READ_DELAY/WRITE_DELAY below if you enable LOWSPEED
- *
- #define LOWSPEED
- */
- #ifndef READ_DELAY
- #define READ_DELAY 100 /* adapter internal read delay in 100ns units */
- #endif
- #ifndef WRITE_DELAY
- #define WRITE_DELAY 100 /* adapter internal write delay in 100ns units */
- #endif
- /*
- * Enable this #define if you want the adapter to do a "ifconfig down" on
- * itself when we have detected that something is possibly wrong with it.
- * The default behaviour is to retry with "adapter_init()" until success.
- * This should be used for debugging purposes only.
- *
- #define SHUTDOWN_WHEN_LOST
- */
- /*
- * Enable debugging by "-DDE620_DEBUG=3" when compiling,
- * OR by enabling the following #define
- *
- * use 0 for production, 1 for verification, >2 for debug
- *
- #define DE620_DEBUG 3
- */
- #ifdef LOWSPEED
- /*
- * Enable this #define if you want to see debugging output that show how long
- * we have to wait before the DE-620 is ready for the next read/write/command.
- *
- #define COUNT_LOOPS
- */
- #endif
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/types.h>
- #include <linux/fcntl.h>
- #include <linux/string.h>
- #include <linux/interrupt.h>
- #include <linux/ioport.h>
- #include <asm/io.h>
- #include <linux/in.h>
- #include <linux/ptrace.h>
- #include <asm/system.h>
- #include <linux/errno.h>
- #include <linux/init.h>
- #include <linux/inet.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- /* Constant definitions for the DE-620 registers, commands and bits */
- #include "de620.h"
- typedef unsigned char byte;
- /*******************************************************
- * *
- * Definition of D-Link DE-620 Ethernet Pocket adapter *
- * See also "de620.h" *
- * *
- *******************************************************/
- #ifndef DE620_IO /* Compile-time configurable */
- #define DE620_IO 0x378
- #endif
- #ifndef DE620_IRQ /* Compile-time configurable */
- #define DE620_IRQ 7
- #endif
- #define DATA_PORT (dev->base_addr)
- #define STATUS_PORT (dev->base_addr + 1)
- #define COMMAND_PORT (dev->base_addr + 2)
- #define RUNT 60 /* Too small Ethernet packet */
- #define GIANT 1514 /* largest legal size packet, no fcs */
- #ifdef DE620_DEBUG /* Compile-time configurable */
- #define PRINTK(x) if (de620_debug >= 2) printk x
- #else
- #define DE620_DEBUG 0
- #define PRINTK(x) /**/
- #endif
- /*
- * Force media with insmod:
- * insmod de620.o bnc=1
- * or
- * insmod de620.o utp=1
- *
- * Force io and/or irq with insmod:
- * insmod de620.o io=0x378 irq=7
- *
- * Make a clone skip the Ethernet-address range check:
- * insmod de620.o clone=1
- */
- static int bnc;
- static int utp;
- static int io = DE620_IO;
- static int irq = DE620_IRQ;
- static int clone = DE620_CLONE;
- static unsigned int de620_debug = DE620_DEBUG;
- MODULE_PARM(bnc, "i");
- MODULE_PARM(utp, "i");
- MODULE_PARM(io, "i");
- MODULE_PARM(irq, "i");
- MODULE_PARM(clone, "i");
- MODULE_PARM(de620_debug, "i");
- MODULE_PARM_DESC(bnc, "DE-620 set BNC medium (0-1)");
- MODULE_PARM_DESC(utp, "DE-620 set UTP medium (0-1)");
- MODULE_PARM_DESC(io, "DE-620 I/O base address,required");
- MODULE_PARM_DESC(irq, "DE-620 IRQ number,required");
- MODULE_PARM_DESC(clone, "Check also for non-D-Link DE-620 clones (0-1)");
- MODULE_PARM_DESC(de620_debug, "DE-620 debug level (0-2)");
- /***********************************************
- * *
- * Index to functions, as function prototypes. *
- * *
- ***********************************************/
- /*
- * Routines used internally. (See also "convenience macros.. below")
- */
- /* Put in the device structure. */
- static int de620_open(struct net_device *);
- static int de620_close(struct net_device *);
- static struct net_device_stats *get_stats(struct net_device *);
- static void de620_set_multicast_list(struct net_device *);
- static int de620_start_xmit(struct sk_buff *, struct net_device *);
- /* Dispatch from interrupts. */
- static void de620_interrupt(int, void *, struct pt_regs *);
- static int de620_rx_intr(struct net_device *);
- /* Initialization */
- static int adapter_init(struct net_device *);
- int de620_probe(struct net_device *);
- static int read_eeprom(struct net_device *);
- /*
- * D-Link driver variables:
- */
- #define SCR_DEF NIBBLEMODE |INTON | SLEEP | AUTOTX
- #define TCR_DEF RXPB /* not used: | TXSUCINT | T16INT */
- #define DE620_RX_START_PAGE 12 /* 12 pages (=3k) reserved for tx */
- #define DEF_NIC_CMD IRQEN | ICEN | DS1
- static volatile byte NIC_Cmd;
- static volatile byte next_rx_page;
- static byte first_rx_page;
- static byte last_rx_page;
- static byte EIPRegister;
- static struct nic {
- byte NodeID[6];
- byte RAM_Size;
- byte Model;
- byte Media;
- byte SCR;
- } nic_data;
- /**********************************************************
- * *
- * Convenience macros/functions for D-Link DE-620 adapter *
- * *
- **********************************************************/
- #define de620_tx_buffs(dd) (inb(STATUS_PORT) & (TXBF0 | TXBF1))
- #define de620_flip_ds(dd) NIC_Cmd ^= DS0 | DS1; outb(NIC_Cmd, COMMAND_PORT);
- /* Check for ready-status, and return a nibble (high 4 bits) for data input */
- #ifdef COUNT_LOOPS
- static int tot_cnt;
- #endif
- static inline byte
- de620_ready(struct net_device *dev)
- {
- byte value;
- register short int cnt = 0;
- while ((((value = inb(STATUS_PORT)) & READY) == 0) && (cnt <= 1000))
- ++cnt;
- #ifdef COUNT_LOOPS
- tot_cnt += cnt;
- #endif
- return value & 0xf0; /* nibble */
- }
- static inline void
- de620_send_command(struct net_device *dev, byte cmd)
- {
- de620_ready(dev);
- if (cmd == W_DUMMY)
- outb(NIC_Cmd, COMMAND_PORT);
- outb(cmd, DATA_PORT);
- outb(NIC_Cmd ^ CS0, COMMAND_PORT);
- de620_ready(dev);
- outb(NIC_Cmd, COMMAND_PORT);
- }
- static inline void
- de620_put_byte(struct net_device *dev, byte value)
- {
- /* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
- de620_ready(dev);
- outb(value, DATA_PORT);
- de620_flip_ds(dev);
- }
- static inline byte
- de620_read_byte(struct net_device *dev)
- {
- byte value;
- /* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
- value = de620_ready(dev); /* High nibble */
- de620_flip_ds(dev);
- value |= de620_ready(dev) >> 4; /* Low nibble */
- return value;
- }
- static inline void
- de620_write_block(struct net_device *dev, byte *buffer, int count)
- {
- #ifndef LOWSPEED
- byte uflip = NIC_Cmd ^ (DS0 | DS1);
- byte dflip = NIC_Cmd;
- #else /* LOWSPEED */
- #ifdef COUNT_LOOPS
- int bytes = count;
- #endif /* COUNT_LOOPS */
- #endif /* LOWSPEED */
- #ifdef LOWSPEED
- #ifdef COUNT_LOOPS
- tot_cnt = 0;
- #endif /* COUNT_LOOPS */
- /* No further optimization useful, the limit is in the adapter. */
- for ( ; count > 0; --count, ++buffer) {
- de620_put_byte(dev,*buffer);
- }
- de620_send_command(dev,W_DUMMY);
- #ifdef COUNT_LOOPS
- /* trial debug output: loops per byte in de620_ready() */
- printk("WRITE(%d)n", tot_cnt/((bytes?bytes:1)));
- #endif /* COUNT_LOOPS */
- #else /* not LOWSPEED */
- for ( ; count > 0; count -=2) {
- outb(*buffer++, DATA_PORT);
- outb(uflip, COMMAND_PORT);
- outb(*buffer++, DATA_PORT);
- outb(dflip, COMMAND_PORT);
- }
- de620_send_command(dev,W_DUMMY);
- #endif /* LOWSPEED */
- }
- static inline void
- de620_read_block(struct net_device *dev, byte *data, int count)
- {
- #ifndef LOWSPEED
- byte value;
- byte uflip = NIC_Cmd ^ (DS0 | DS1);
- byte dflip = NIC_Cmd;
- #else /* LOWSPEED */
- #ifdef COUNT_LOOPS
- int bytes = count;
- tot_cnt = 0;
- #endif /* COUNT_LOOPS */
- #endif /* LOWSPEED */
- #ifdef LOWSPEED
- /* No further optimization useful, the limit is in the adapter. */
- while (count-- > 0) {
- *data++ = de620_read_byte(dev);
- de620_flip_ds(dev);
- }
- #ifdef COUNT_LOOPS
- /* trial debug output: loops per byte in de620_ready() */
- printk("READ(%d)n", tot_cnt/(2*(bytes?bytes:1)));
- #endif /* COUNT_LOOPS */
- #else /* not LOWSPEED */
- while (count-- > 0) {
- value = inb(STATUS_PORT) & 0xf0; /* High nibble */
- outb(uflip, COMMAND_PORT);
- *data++ = value | inb(STATUS_PORT) >> 4; /* Low nibble */
- outb(dflip , COMMAND_PORT);
- }
- #endif /* LOWSPEED */
- }
- static inline void
- de620_set_delay(struct net_device *dev)
- {
- de620_ready(dev);
- outb(W_DFR, DATA_PORT);
- outb(NIC_Cmd ^ CS0, COMMAND_PORT);
- de620_ready(dev);
- #ifdef LOWSPEED
- outb(WRITE_DELAY, DATA_PORT);
- #else
- outb(0, DATA_PORT);
- #endif
- de620_flip_ds(dev);
- de620_ready(dev);
- #ifdef LOWSPEED
- outb(READ_DELAY, DATA_PORT);
- #else
- outb(0, DATA_PORT);
- #endif
- de620_flip_ds(dev);
- }
- static inline void
- de620_set_register(struct net_device *dev, byte reg, byte value)
- {
- de620_ready(dev);
- outb(reg, DATA_PORT);
- outb(NIC_Cmd ^ CS0, COMMAND_PORT);
- de620_put_byte(dev, value);
- }
- static inline byte
- de620_get_register(struct net_device *dev, byte reg)
- {
- byte value;
- de620_send_command(dev,reg);
- value = de620_read_byte(dev);
- de620_send_command(dev,W_DUMMY);
- return value;
- }
- /*********************************************************************
- *
- * Open/initialize the board.
- *
- * This routine should set everything up anew at each open, even
- * registers that "should" only need to be set once at boot, so that
- * there is a non-reboot way to recover if something goes wrong.
- *
- */
- static int de620_open(struct net_device *dev)
- {
- int ret = request_irq(dev->irq, de620_interrupt, 0, dev->name, dev);
- if (ret) {
- printk (KERN_ERR "%s: unable to get IRQ %dn", dev->name, dev->irq);
- return ret;
- }
- if (adapter_init(dev)) {
- ret = -EIO;
- goto out_free_irq;
- }
- netif_start_queue(dev);
- return 0;
- out_free_irq:
- free_irq(dev->irq, dev);
- return ret;
- }
- /************************************************
- *
- * The inverse routine to de620_open().
- *
- */
- static int de620_close(struct net_device *dev)
- {
- netif_stop_queue(dev);
- /* disable recv */
- de620_set_register(dev, W_TCR, RXOFF);
- free_irq(dev->irq, dev);
- return 0;
- }
- /*********************************************
- *
- * Return current statistics
- *
- */
- static struct net_device_stats *get_stats(struct net_device *dev)
- {
- return (struct net_device_stats *)(dev->priv);
- }
- /*********************************************
- *
- * Set or clear the multicast filter for this adaptor.
- * (no real multicast implemented for the DE-620, but she can be promiscuous...)
- *
- */
- static void de620_set_multicast_list(struct net_device *dev)
- {
- if (dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
- { /* Enable promiscuous mode */
- /*
- * We must make the kernel realise we had to move
- * into promisc mode or we start all out war on
- * the cable. - AC
- */
- dev->flags|=IFF_PROMISC;
- de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
- }
- else
- { /* Disable promiscuous mode, use normal mode */
- de620_set_register(dev, W_TCR, TCR_DEF);
- }
- }
- /*******************************************************
- *
- * Handle timeouts on transmit
- */
-
- static void de620_timeout(struct net_device *dev)
- {
- printk("%s: transmit timed out, %s?n",
- dev->name,
- "network cable problem"
- );
- /* Restart the adapter. */
- if (!adapter_init(dev)) /* maybe close it */
- netif_wake_queue(dev);
- }
- /*******************************************************
- *
- * Copy a buffer to the adapter transmit page memory.
- * Start sending.
- */
- static int de620_start_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- unsigned long flags;
- int len;
- byte *buffer = skb->data;
- byte using_txbuf;
- using_txbuf = de620_tx_buffs(dev); /* Peek at the adapter */
-
- netif_stop_queue(dev);
-
- if ((len = skb->len) < RUNT)
- len = RUNT;
- if (len & 1) /* send an even number of bytes */
- ++len;
- /* Start real output */
- save_flags(flags);
- cli();
- PRINTK(("de620_start_xmit: len=%d, bufs 0x%02xn",
- (int)skb->len, using_txbuf));
- /* select a free tx buffer. if there is one... */
- switch (using_txbuf) {
- default: /* both are free: use TXBF0 */
- case TXBF1: /* use TXBF0 */
- de620_send_command(dev,W_CR | RW0);
- using_txbuf |= TXBF0;
- break;
- case TXBF0: /* use TXBF1 */
- de620_send_command(dev,W_CR | RW1);
- using_txbuf |= TXBF1;
- break;
- case (TXBF0 | TXBF1): /* NONE!!! */
- printk(KERN_WARNING "%s: No tx-buffer available!n", dev->name);
- restore_flags(flags);
- return 1;
- }
- de620_write_block(dev, buffer, len);
- dev->trans_start = jiffies;
- if(!(using_txbuf == (TXBF0 | TXBF1)))
- netif_wake_queue(dev);
- ((struct net_device_stats *)(dev->priv))->tx_packets++;
- restore_flags(flags); /* interrupts maybe back on */
- dev_kfree_skb (skb);
- return 0;
- }
- /*****************************************************
- *
- * Handle the network interface interrupts.
- *
- */
- static void de620_interrupt(int irq_in, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = dev_id;
- byte irq_status;
- int bogus_count = 0;
- int again = 0;
- /* This might be deleted now, no crummy drivers present :-) Or..? */
- if ((dev == NULL) || (irq != irq_in)) {
- printk("%s: bogus interrupt %dn", dev?dev->name:"de620", irq_in);
- return;
- }
- /* Read the status register (_not_ the status port) */
- irq_status = de620_get_register(dev, R_STS);
- PRINTK(("de620_interrupt (%2.2X)n", irq_status));
- if (irq_status & RXGOOD) {
- do {
- again = de620_rx_intr(dev);
- PRINTK(("again=%dn", again));
- }
- while (again && (++bogus_count < 100));
- }
- if(de620_tx_buffs(dev) != (TXBF0 | TXBF1))
- netif_wake_queue(dev);
- }
- /**************************************
- *
- * Get a packet from the adapter
- *
- * Send it "upstairs"
- *
- */
- static int de620_rx_intr(struct net_device *dev)
- {
- struct header_buf {
- byte status;
- byte Rx_NextPage;
- unsigned short Rx_ByteCount;
- } header_buf;
- struct sk_buff *skb;
- int size;
- byte *buffer;
- byte pagelink;
- byte curr_page;
- PRINTK(("de620_rx_intr: next_rx_page = %dn", next_rx_page));
- /* Tell the adapter that we are going to read data, and from where */
- de620_send_command(dev, W_CR | RRN);
- de620_set_register(dev, W_RSA1, next_rx_page);
- de620_set_register(dev, W_RSA0, 0);
- /* Deep breath, and away we goooooo */
- de620_read_block(dev, (byte *)&header_buf, sizeof(struct header_buf));
- PRINTK(("page status=0x%02x, nextpage=%d, packetsize=%dn",
- header_buf.status, header_buf.Rx_NextPage, header_buf.Rx_ByteCount));
- /* Plausible page header? */
- pagelink = header_buf.Rx_NextPage;
- if ((pagelink < first_rx_page) || (last_rx_page < pagelink)) {
- /* Ouch... Forget it! Skip all and start afresh... */
- printk(KERN_WARNING "%s: Ring overrun? Restoring...n", dev->name);
- /* You win some, you lose some. And sometimes plenty... */
- adapter_init(dev);
- netif_wake_queue(dev);
- ((struct net_device_stats *)(dev->priv))->rx_over_errors++;
- return 0;
- }
- /* OK, this look good, so far. Let's see if it's consistent... */
- /* Let's compute the start of the next packet, based on where we are */
- pagelink = next_rx_page +
- ((header_buf.Rx_ByteCount + (4 - 1 + 0x100)) >> 8);
- /* Are we going to wrap around the page counter? */
- if (pagelink > last_rx_page)
- pagelink -= (last_rx_page - first_rx_page + 1);
- /* Is the _computed_ next page number equal to what the adapter says? */
- if (pagelink != header_buf.Rx_NextPage) {
- /* Naah, we'll skip this packet. Probably bogus data as well */
- printk(KERN_WARNING "%s: Page link out of sync! Restoring...n", dev->name);
- next_rx_page = header_buf.Rx_NextPage; /* at least a try... */
- de620_send_command(dev, W_DUMMY);
- de620_set_register(dev, W_NPRF, next_rx_page);
- ((struct net_device_stats *)(dev->priv))->rx_over_errors++;
- return 0;
- }
- next_rx_page = pagelink;
- size = header_buf.Rx_ByteCount - 4;
- if ((size < RUNT) || (GIANT < size)) {
- printk(KERN_WARNING "%s: Illegal packet size: %d!n", dev->name, size);
- }
- else { /* Good packet? */
- skb = dev_alloc_skb(size+2);
- if (skb == NULL) { /* Yeah, but no place to put it... */
- printk(KERN_WARNING "%s: Couldn't allocate a sk_buff of size %d.n",
- dev->name, size);
- ((struct net_device_stats *)(dev->priv))->rx_dropped++;
- }
- else { /* Yep! Go get it! */
- skb_reserve(skb,2); /* Align */
- skb->dev = dev;
- /* skb->data points to the start of sk_buff data area */
- buffer = skb_put(skb,size);
- /* copy the packet into the buffer */
- de620_read_block(dev, buffer, size);
- PRINTK(("Read %d bytesn", size));
- skb->protocol=eth_type_trans(skb,dev);
- netif_rx(skb); /* deliver it "upstairs" */
- dev->last_rx = jiffies;
- /* count all receives */
- ((struct net_device_stats *)(dev->priv))->rx_packets++;
- ((struct net_device_stats *)(dev->priv))->rx_bytes += size;
- }
- }
- /* Let's peek ahead to see if we have read the last current packet */
- /* NOTE! We're _not_ checking the 'EMPTY'-flag! This seems better... */
- curr_page = de620_get_register(dev, R_CPR);
- de620_set_register(dev, W_NPRF, next_rx_page);
- PRINTK(("next_rx_page=%d CPR=%dn", next_rx_page, curr_page));
- return (next_rx_page != curr_page); /* That was slightly tricky... */
- }
- /*********************************************
- *
- * Reset the adapter to a known state
- *
- */
- static int adapter_init(struct net_device *dev)
- {
- int i;
- static int was_down;
- if ((nic_data.Model == 3) || (nic_data.Model == 0)) { /* CT */
- EIPRegister = NCTL0;
- if (nic_data.Media != 1)
- EIPRegister |= NIS0; /* not BNC */
- }
- else if (nic_data.Model == 2) { /* UTP */
- EIPRegister = NCTL0 | NIS0;
- }
- if (utp)
- EIPRegister = NCTL0 | NIS0;
- if (bnc)
- EIPRegister = NCTL0;
- de620_send_command(dev, W_CR | RNOP | CLEAR);
- de620_send_command(dev, W_CR | RNOP);
- de620_set_register(dev, W_SCR, SCR_DEF);
- /* disable recv to wait init */
- de620_set_register(dev, W_TCR, RXOFF);
- /* Set the node ID in the adapter */
- for (i = 0; i < 6; ++i) { /* W_PARn = 0xaa + n */
- de620_set_register(dev, W_PAR0 + i, dev->dev_addr[i]);
- }
- de620_set_register(dev, W_EIP, EIPRegister);
- next_rx_page = first_rx_page = DE620_RX_START_PAGE;
- if (nic_data.RAM_Size)
- last_rx_page = nic_data.RAM_Size - 1;
- else /* 64k RAM */
- last_rx_page = 255;
- de620_set_register(dev, W_SPR, first_rx_page); /* Start Page Register*/
- de620_set_register(dev, W_EPR, last_rx_page); /* End Page Register */
- de620_set_register(dev, W_CPR, first_rx_page);/*Current Page Register*/
- de620_send_command(dev, W_NPR | first_rx_page); /* Next Page Register*/
- de620_send_command(dev, W_DUMMY);
- de620_set_delay(dev);
- /* Final sanity check: Anybody out there? */
- /* Let's hope some bits from the statusregister make a good check */
- #define CHECK_MASK ( 0 | TXSUC | T16 | 0 | RXCRC | RXSHORT | 0 | 0 )
- #define CHECK_OK ( 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 )
- /* success: X 0 0 X 0 0 X X */
- /* ignore: EEDI RXGOOD COLS LNKS*/
- if (((i = de620_get_register(dev, R_STS)) & CHECK_MASK) != CHECK_OK) {
- printk(KERN_ERR "%s: Something has happened to the DE-620! Please check it"
- #ifdef SHUTDOWN_WHEN_LOST
- " and do a new ifconfig"
- #endif
- "! (%02x)n", dev->name, i);
- #ifdef SHUTDOWN_WHEN_LOST
- /* Goodbye, cruel world... */
- dev->flags &= ~IFF_UP;
- de620_close(dev);
- #endif
- was_down = 1;
- return 1; /* failed */
- }
- if (was_down) {
- printk(KERN_WARNING "%s: Thanks, I feel much better now!n", dev->name);
- was_down = 0;
- }
- /* All OK, go ahead... */
- de620_set_register(dev, W_TCR, TCR_DEF);
- return 0; /* all ok */
- }
- /******************************************************************************
- *
- * Only start-up code below
- *
- */
- /****************************************
- *
- * Check if there is a DE-620 connected
- */
- int __init de620_probe(struct net_device *dev)
- {
- static struct net_device_stats de620_netstats;
- int i;
- byte checkbyte = 0xa5;
- SET_MODULE_OWNER(dev);
- /*
- * This is where the base_addr and irq gets set.
- * Tunable at compile-time and insmod-time
- */
- dev->base_addr = io;
- dev->irq = irq;
- if (de620_debug)
- printk(version);
- printk(KERN_INFO "D-Link DE-620 pocket adapter");
- /* Initially, configure basic nibble mode, so we can read the EEPROM */
- NIC_Cmd = DEF_NIC_CMD;
- de620_set_register(dev, W_EIP, EIPRegister);
- /* Anybody out there? */
- de620_set_register(dev, W_CPR, checkbyte);
- checkbyte = de620_get_register(dev, R_CPR);
- if ((checkbyte != 0xa5) || (read_eeprom(dev) != 0)) {
- printk(" not identified in the printer portn");
- return -ENODEV;
- }
- #if 0 /* Not yet */
- if (check_region(dev->base_addr, 3)) {
- printk(", port 0x%x busyn", dev->base_addr);
- return -EBUSY;
- }
- #endif
- if (!request_region(dev->base_addr, 3, "de620")) {
- printk(KERN_ERR "io 0x%3lX, which is busy.n", dev->base_addr);
- return -EBUSY;
- }
- /* else, got it! */
- printk(", Ethernet Address: %2.2X",
- dev->dev_addr[0] = nic_data.NodeID[0]);
- for (i = 1; i < ETH_ALEN; i++) {
- printk(":%2.2X", dev->dev_addr[i] = nic_data.NodeID[i]);
- dev->broadcast[i] = 0xff;
- }
- printk(" (%dk RAM,",
- (nic_data.RAM_Size) ? (nic_data.RAM_Size >> 2) : 64);
- if (nic_data.Media == 1)
- printk(" BNC)n");
- else
- printk(" UTP)n");
- /* Initialize the device structure. */
- dev->priv = &de620_netstats;
- memset(dev->priv, 0, sizeof(struct net_device_stats));
- dev->get_stats = get_stats;
- dev->open = de620_open;
- dev->stop = de620_close;
- dev->hard_start_xmit = de620_start_xmit;
- dev->tx_timeout = de620_timeout;
- dev->watchdog_timeo = HZ*2;
- dev->set_multicast_list = de620_set_multicast_list;
-
- /* base_addr and irq are already set, see above! */
- ether_setup(dev);
- /* dump eeprom */
- if (de620_debug) {
- printk("nEEPROM contents:n");
- printk("RAM_Size = 0x%02Xn", nic_data.RAM_Size);
- printk("NodeID = %02X:%02X:%02X:%02X:%02X:%02Xn",
- nic_data.NodeID[0], nic_data.NodeID[1],
- nic_data.NodeID[2], nic_data.NodeID[3],
- nic_data.NodeID[4], nic_data.NodeID[5]);
- printk("Model = %dn", nic_data.Model);
- printk("Media = %dn", nic_data.Media);
- printk("SCR = 0x%02xn", nic_data.SCR);
- }
- return 0;
- }
- /**********************************
- *
- * Read info from on-board EEPROM
- *
- * Note: Bitwise serial I/O to/from the EEPROM vi the status _register_!
- */
- #define sendit(dev,data) de620_set_register(dev, W_EIP, data | EIPRegister);
- static unsigned short __init ReadAWord(struct net_device *dev, int from)
- {
- unsigned short data;
- int nbits;
- /* cs [__~~] SET SEND STATE */
- /* di [____] */
- /* sck [_~~_] */
- sendit(dev, 0); sendit(dev, 1); sendit(dev, 5); sendit(dev, 4);
- /* Send the 9-bit address from where we want to read the 16-bit word */
- for (nbits = 9; nbits > 0; --nbits, from <<= 1) {
- if (from & 0x0100) { /* bit set? */
- /* cs [~~~~] SEND 1 */
- /* di [~~~~] */
- /* sck [_~~_] */
- sendit(dev, 6); sendit(dev, 7); sendit(dev, 7); sendit(dev, 6);
- }
- else {
- /* cs [~~~~] SEND 0 */
- /* di [____] */
- /* sck [_~~_] */
- sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
- }
- }
- /* Shift in the 16-bit word. The bits appear serially in EEDI (=0x80) */
- for (data = 0, nbits = 16; nbits > 0; --nbits) {
- /* cs [~~~~] SEND 0 */
- /* di [____] */
- /* sck [_~~_] */
- sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
- data = (data << 1) | ((de620_get_register(dev, R_STS) & EEDI) >> 7);
- }
- /* cs [____] RESET SEND STATE */
- /* di [____] */
- /* sck [_~~_] */
- sendit(dev, 0); sendit(dev, 1); sendit(dev, 1); sendit(dev, 0);
- return data;
- }
- static int __init read_eeprom(struct net_device *dev)
- {
- unsigned short wrd;
- /* D-Link Ethernet addresses are in the series 00:80:c8:7X:XX:XX:XX */
- wrd = ReadAWord(dev, 0x1aa); /* bytes 0 + 1 of NodeID */
- if (!clone && (wrd != htons(0x0080))) /* Valid D-Link ether sequence? */
- return -1; /* Nope, not a DE-620 */
- nic_data.NodeID[0] = wrd & 0xff;
- nic_data.NodeID[1] = wrd >> 8;
- wrd = ReadAWord(dev, 0x1ab); /* bytes 2 + 3 of NodeID */
- if (!clone && ((wrd & 0xff) != 0xc8)) /* Valid D-Link ether sequence? */
- return -1; /* Nope, not a DE-620 */
- nic_data.NodeID[2] = wrd & 0xff;
- nic_data.NodeID[3] = wrd >> 8;
- wrd = ReadAWord(dev, 0x1ac); /* bytes 4 + 5 of NodeID */
- nic_data.NodeID[4] = wrd & 0xff;
- nic_data.NodeID[5] = wrd >> 8;
- wrd = ReadAWord(dev, 0x1ad); /* RAM size in pages (256 bytes). 0 = 64k */
- nic_data.RAM_Size = (wrd >> 8);
- wrd = ReadAWord(dev, 0x1ae); /* hardware model (CT = 3) */
- nic_data.Model = (wrd & 0xff);
- wrd = ReadAWord(dev, 0x1af); /* media (indicates BNC/UTP) */
- nic_data.Media = (wrd & 0xff);
- wrd = ReadAWord(dev, 0x1a8); /* System Configuration Register */
- nic_data.SCR = (wrd >> 8);
- return 0; /* no errors */
- }
- /******************************************************************************
- *
- * Loadable module skeleton
- *
- */
- #ifdef MODULE
- static struct net_device de620_dev;
- int init_module(void)
- {
- de620_dev.init = de620_probe;
- if (register_netdev(&de620_dev) != 0)
- return -EIO;
- return 0;
- }
- void cleanup_module(void)
- {
- unregister_netdev(&de620_dev);
- release_region(de620_dev.base_addr, 3);
- }
- #endif /* MODULE */
- MODULE_LICENSE("GPL");
- /*
- * (add '-DMODULE' when compiling as loadable module)
- *
- * compile-command:
- * gcc -D__KERNEL__ -Wall -Wstrict-prototypes -O2
- * -fomit-frame-pointer -m486
- * -I/usr/src/linux/include -I../../net/inet -c de620.c
- */
- /*
- * Local variables:
- * kernel-compile-command: "gcc -D__KERNEL__ -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
- * module-compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
- * compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
- * End:
- */