2 * de620.c $Revision: 1.1.1.1 $ BETA
5 * Linux driver for the D-Link DE-620 Ethernet pocket adapter.
7 * Portions (C) Copyright 1993, 1994 by Bjorn Ekwall <bj0rn@blox.se>
9 * Based on adapter information gathered from DOS packetdriver
10 * sources from D-Link Inc: (Special thanks to Henry Ngai of D-Link.)
11 * Portions (C) Copyright D-Link SYSTEM Inc. 1991, 1992
12 * Copyright, 1988, Russell Nelson, Crynwr Software
14 * Adapted to the sample network driver core for linux,
15 * written by: Donald Becker <becker@super.org>
16 * (Now at <becker@scyld.com>)
18 * Valuable assistance from:
19 * J. Joshua Kopper <kopper@rtsg.mot.com>
20 * Olav Kvittem <Olav.Kvittem@uninett.no>
21 * Germano Caronni <caronni@nessie.cs.id.ethz.ch>
22 * Jeremy Fitzhardinge <jeremy@suite.sw.oz.au>
24 *****************************************************************************/
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2, or (at your option)
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
40 *****************************************************************************/
41 static const char version[] =
42 "de620.c: $Revision: 1.1.1.1 $, Bjorn Ekwall <bj0rn@blox.se>\n";
44 /***********************************************************************
48 * Compile-time options: (see below for descriptions)
49 * -DDE620_IO=0x378 (lpt1)
50 * -DDE620_IRQ=7 (lpt1)
52 * -DSHUTDOWN_WHEN_LOST
60 * This driver assumes that the printer port is a "normal",
61 * dumb, uni-directional port!
62 * If your port is "fancy" in any way, please try to set it to "normal"
63 * with your BIOS setup. I have no access to machines with bi-directional
64 * ports, so I can't test such a driver :-(
65 * (Yes, I _know_ it is possible to use DE620 with bidirectional ports...)
67 * There are some clones of DE620 out there, with different names.
68 * If the current driver does not recognize a clone, try to change
69 * the following #define to:
71 * #define DE620_CLONE 1
76 * If the adapter has problems with high speeds, enable this #define
77 * otherwise full printerport speed will be attempted.
79 * You can tune the READ_DELAY/WRITE_DELAY below if you enable LOWSPEED
85 #define READ_DELAY 100 /* adapter internal read delay in 100ns units */
89 #define WRITE_DELAY 100 /* adapter internal write delay in 100ns units */
93 * Enable this #define if you want the adapter to do a "ifconfig down" on
94 * itself when we have detected that something is possibly wrong with it.
95 * The default behaviour is to retry with "adapter_init()" until success.
96 * This should be used for debugging purposes only.
98 #define SHUTDOWN_WHEN_LOST
102 * Enable debugging by "-DDE620_DEBUG=3" when compiling,
103 * OR by enabling the following #define
105 * use 0 for production, 1 for verification, >2 for debug
107 #define DE620_DEBUG 3
112 * Enable this #define if you want to see debugging output that show how long
113 * we have to wait before the DE-620 is ready for the next read/write/command.
119 #include <linux/module.h>
121 #include <linux/kernel.h>
122 #include <linux/sched.h>
123 #include <linux/types.h>
124 #include <linux/fcntl.h>
125 #include <linux/string.h>
126 #include <linux/interrupt.h>
127 #include <linux/ioport.h>
129 #include <linux/in.h>
130 #include <linux/ptrace.h>
131 #include <asm/system.h>
132 #include <linux/errno.h>
133 #include <linux/init.h>
135 #include <linux/inet.h>
136 #include <linux/netdevice.h>
137 #include <linux/etherdevice.h>
138 #include <linux/skbuff.h>
140 /* Constant definitions for the DE-620 registers, commands and bits */
143 typedef unsigned char byte;
145 /*******************************************************
147 * Definition of D-Link DE-620 Ethernet Pocket adapter *
148 * See also "de620.h" *
150 *******************************************************/
151 #ifndef DE620_IO /* Compile-time configurable */
152 #define DE620_IO 0x378
155 #ifndef DE620_IRQ /* Compile-time configurable */
159 #define DATA_PORT (dev->base_addr)
160 #define STATUS_PORT (dev->base_addr + 1)
161 #define COMMAND_PORT (dev->base_addr + 2)
163 #define RUNT 60 /* Too small Ethernet packet */
164 #define GIANT 1514 /* largest legal size packet, no fcs */
166 #ifdef DE620_DEBUG /* Compile-time configurable */
167 #define PRINTK(x) if (de620_debug >= 2) printk x
169 #define DE620_DEBUG 0
170 #define PRINTK(x) /**/
175 * Force media with insmod:
176 * insmod de620.o bnc=1
178 * insmod de620.o utp=1
180 * Force io and/or irq with insmod:
181 * insmod de620.o io=0x378 irq=7
183 * Make a clone skip the Ethernet-address range check:
184 * insmod de620.o clone=1
188 static int io = DE620_IO;
189 static int irq = DE620_IRQ;
190 static int clone = DE620_CLONE;
192 static unsigned int de620_debug = DE620_DEBUG;
194 MODULE_PARM(bnc, "i");
195 MODULE_PARM(utp, "i");
196 MODULE_PARM(io, "i");
197 MODULE_PARM(irq, "i");
198 MODULE_PARM(clone, "i");
199 MODULE_PARM(de620_debug, "i");
200 MODULE_PARM_DESC(bnc, "DE-620 set BNC medium (0-1)");
201 MODULE_PARM_DESC(utp, "DE-620 set UTP medium (0-1)");
202 MODULE_PARM_DESC(io, "DE-620 I/O base address,required");
203 MODULE_PARM_DESC(irq, "DE-620 IRQ number,required");
204 MODULE_PARM_DESC(clone, "Check also for non-D-Link DE-620 clones (0-1)");
205 MODULE_PARM_DESC(de620_debug, "DE-620 debug level (0-2)");
207 /***********************************************
209 * Index to functions, as function prototypes. *
211 ***********************************************/
214 * Routines used internally. (See also "convenience macros.. below")
217 /* Put in the device structure. */
218 static int de620_open(struct net_device *);
219 static int de620_close(struct net_device *);
220 static struct net_device_stats *get_stats(struct net_device *);
221 static void de620_set_multicast_list(struct net_device *);
222 static int de620_start_xmit(struct sk_buff *, struct net_device *);
224 /* Dispatch from interrupts. */
225 static void de620_interrupt(int, void *, struct pt_regs *);
226 static int de620_rx_intr(struct net_device *);
229 static int adapter_init(struct net_device *);
230 int de620_probe(struct net_device *);
231 static int read_eeprom(struct net_device *);
235 * D-Link driver variables:
237 #define SCR_DEF NIBBLEMODE |INTON | SLEEP | AUTOTX
238 #define TCR_DEF RXPB /* not used: | TXSUCINT | T16INT */
239 #define DE620_RX_START_PAGE 12 /* 12 pages (=3k) reserved for tx */
240 #define DEF_NIC_CMD IRQEN | ICEN | DS1
242 static volatile byte NIC_Cmd;
243 static volatile byte next_rx_page;
244 static byte first_rx_page;
245 static byte last_rx_page;
246 static byte EIPRegister;
256 /**********************************************************
258 * Convenience macros/functions for D-Link DE-620 adapter *
260 **********************************************************/
261 #define de620_tx_buffs(dd) (inb(STATUS_PORT) & (TXBF0 | TXBF1))
262 #define de620_flip_ds(dd) NIC_Cmd ^= DS0 | DS1; outb(NIC_Cmd, COMMAND_PORT);
264 /* Check for ready-status, and return a nibble (high 4 bits) for data input */
269 de620_ready(struct net_device *dev)
272 register short int cnt = 0;
274 while ((((value = inb(STATUS_PORT)) & READY) == 0) && (cnt <= 1000))
280 return value & 0xf0; /* nibble */
284 de620_send_command(struct net_device *dev, byte cmd)
288 outb(NIC_Cmd, COMMAND_PORT);
290 outb(cmd, DATA_PORT);
292 outb(NIC_Cmd ^ CS0, COMMAND_PORT);
294 outb(NIC_Cmd, COMMAND_PORT);
298 de620_put_byte(struct net_device *dev, byte value)
300 /* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
302 outb(value, DATA_PORT);
307 de620_read_byte(struct net_device *dev)
311 /* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
312 value = de620_ready(dev); /* High nibble */
314 value |= de620_ready(dev) >> 4; /* Low nibble */
319 de620_write_block(struct net_device *dev, byte *buffer, int count, int pad)
322 byte uflip = NIC_Cmd ^ (DS0 | DS1);
323 byte dflip = NIC_Cmd;
327 #endif /* COUNT_LOOPS */
328 #endif /* LOWSPEED */
333 #endif /* COUNT_LOOPS */
334 /* No further optimization useful, the limit is in the adapter. */
335 for ( ; count > 0; --count, ++buffer) {
336 de620_put_byte(dev,*buffer);
338 for ( count = pad ; count > 0; --count, ++buffer) {
339 de620_put_byte(dev, 0);
341 de620_send_command(dev,W_DUMMY);
343 /* trial debug output: loops per byte in de620_ready() */
344 printk("WRITE(%d)\n", tot_cnt/((bytes?bytes:1)));
345 #endif /* COUNT_LOOPS */
346 #else /* not LOWSPEED */
347 for ( ; count > 0; count -=2) {
348 outb(*buffer++, DATA_PORT);
349 outb(uflip, COMMAND_PORT);
350 outb(*buffer++, DATA_PORT);
351 outb(dflip, COMMAND_PORT);
353 de620_send_command(dev,W_DUMMY);
354 #endif /* LOWSPEED */
358 de620_read_block(struct net_device *dev, byte *data, int count)
362 byte uflip = NIC_Cmd ^ (DS0 | DS1);
363 byte dflip = NIC_Cmd;
369 #endif /* COUNT_LOOPS */
370 #endif /* LOWSPEED */
373 /* No further optimization useful, the limit is in the adapter. */
374 while (count-- > 0) {
375 *data++ = de620_read_byte(dev);
379 /* trial debug output: loops per byte in de620_ready() */
380 printk("READ(%d)\n", tot_cnt/(2*(bytes?bytes:1)));
381 #endif /* COUNT_LOOPS */
382 #else /* not LOWSPEED */
383 while (count-- > 0) {
384 value = inb(STATUS_PORT) & 0xf0; /* High nibble */
385 outb(uflip, COMMAND_PORT);
386 *data++ = value | inb(STATUS_PORT) >> 4; /* Low nibble */
387 outb(dflip , COMMAND_PORT);
389 #endif /* LOWSPEED */
393 de620_set_delay(struct net_device *dev)
396 outb(W_DFR, DATA_PORT);
397 outb(NIC_Cmd ^ CS0, COMMAND_PORT);
401 outb(WRITE_DELAY, DATA_PORT);
409 outb(READ_DELAY, DATA_PORT);
417 de620_set_register(struct net_device *dev, byte reg, byte value)
420 outb(reg, DATA_PORT);
421 outb(NIC_Cmd ^ CS0, COMMAND_PORT);
423 de620_put_byte(dev, value);
427 de620_get_register(struct net_device *dev, byte reg)
431 de620_send_command(dev,reg);
432 value = de620_read_byte(dev);
433 de620_send_command(dev,W_DUMMY);
438 /*********************************************************************
440 * Open/initialize the board.
442 * This routine should set everything up anew at each open, even
443 * registers that "should" only need to be set once at boot, so that
444 * there is a non-reboot way to recover if something goes wrong.
447 static int de620_open(struct net_device *dev)
449 int ret = request_irq(dev->irq, de620_interrupt, 0, dev->name, dev);
451 printk (KERN_ERR "%s: unable to get IRQ %d\n", dev->name, dev->irq);
455 if (adapter_init(dev)) {
460 netif_start_queue(dev);
464 free_irq(dev->irq, dev);
468 /************************************************
470 * The inverse routine to de620_open().
474 static int de620_close(struct net_device *dev)
476 netif_stop_queue(dev);
478 de620_set_register(dev, W_TCR, RXOFF);
479 free_irq(dev->irq, dev);
483 /*********************************************
485 * Return current statistics
488 static struct net_device_stats *get_stats(struct net_device *dev)
490 return (struct net_device_stats *)(dev->priv);
493 /*********************************************
495 * Set or clear the multicast filter for this adaptor.
496 * (no real multicast implemented for the DE-620, but she can be promiscuous...)
500 static void de620_set_multicast_list(struct net_device *dev)
502 if (dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
503 { /* Enable promiscuous mode */
505 * We must make the kernel realise we had to move
506 * into promisc mode or we start all out war on
509 dev->flags|=IFF_PROMISC;
511 de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
514 { /* Disable promiscuous mode, use normal mode */
515 de620_set_register(dev, W_TCR, TCR_DEF);
519 /*******************************************************
521 * Handle timeouts on transmit
524 static void de620_timeout(struct net_device *dev)
526 printk("%s: transmit timed out, %s?\n",
528 "network cable problem"
530 /* Restart the adapter. */
531 if (!adapter_init(dev)) /* maybe close it */
532 netif_wake_queue(dev);
535 /*******************************************************
537 * Copy a buffer to the adapter transmit page memory.
540 static int de620_start_xmit(struct sk_buff *skb, struct net_device *dev)
544 byte *buffer = skb->data;
547 using_txbuf = de620_tx_buffs(dev); /* Peek at the adapter */
549 netif_stop_queue(dev);
552 if ((len = skb->len) < RUNT)
554 if (len & 1) /* send an even number of bytes */
557 /* Start real output */
561 PRINTK(("de620_start_xmit: len=%d, bufs 0x%02x\n",
562 (int)skb->len, using_txbuf));
564 /* select a free tx buffer. if there is one... */
565 switch (using_txbuf) {
566 default: /* both are free: use TXBF0 */
567 case TXBF1: /* use TXBF0 */
568 de620_send_command(dev,W_CR | RW0);
569 using_txbuf |= TXBF0;
572 case TXBF0: /* use TXBF1 */
573 de620_send_command(dev,W_CR | RW1);
574 using_txbuf |= TXBF1;
577 case (TXBF0 | TXBF1): /* NONE!!! */
578 printk(KERN_WARNING "%s: No tx-buffer available!\n", dev->name);
579 restore_flags(flags);
582 de620_write_block(dev, buffer, skb->len, len-skb->len);
584 dev->trans_start = jiffies;
585 if(!(using_txbuf == (TXBF0 | TXBF1)))
586 netif_wake_queue(dev);
588 ((struct net_device_stats *)(dev->priv))->tx_packets++;
589 restore_flags(flags); /* interrupts maybe back on */
594 /*****************************************************
596 * Handle the network interface interrupts.
599 static void de620_interrupt(int irq_in, void *dev_id, struct pt_regs *regs)
601 struct net_device *dev = dev_id;
606 /* This might be deleted now, no crummy drivers present :-) Or..? */
607 if ((dev == NULL) || (irq != irq_in)) {
608 printk("%s: bogus interrupt %d\n", dev?dev->name:"de620", irq_in);
612 /* Read the status register (_not_ the status port) */
613 irq_status = de620_get_register(dev, R_STS);
615 PRINTK(("de620_interrupt (%2.2X)\n", irq_status));
617 if (irq_status & RXGOOD) {
619 again = de620_rx_intr(dev);
620 PRINTK(("again=%d\n", again));
622 while (again && (++bogus_count < 100));
625 if(de620_tx_buffs(dev) != (TXBF0 | TXBF1))
626 netif_wake_queue(dev);
629 /**************************************
631 * Get a packet from the adapter
636 static int de620_rx_intr(struct net_device *dev)
641 unsigned short Rx_ByteCount;
649 PRINTK(("de620_rx_intr: next_rx_page = %d\n", next_rx_page));
651 /* Tell the adapter that we are going to read data, and from where */
652 de620_send_command(dev, W_CR | RRN);
653 de620_set_register(dev, W_RSA1, next_rx_page);
654 de620_set_register(dev, W_RSA0, 0);
656 /* Deep breath, and away we goooooo */
657 de620_read_block(dev, (byte *)&header_buf, sizeof(struct header_buf));
658 PRINTK(("page status=0x%02x, nextpage=%d, packetsize=%d\n",
659 header_buf.status, header_buf.Rx_NextPage, header_buf.Rx_ByteCount));
661 /* Plausible page header? */
662 pagelink = header_buf.Rx_NextPage;
663 if ((pagelink < first_rx_page) || (last_rx_page < pagelink)) {
664 /* Ouch... Forget it! Skip all and start afresh... */
665 printk(KERN_WARNING "%s: Ring overrun? Restoring...\n", dev->name);
666 /* You win some, you lose some. And sometimes plenty... */
668 netif_wake_queue(dev);
669 ((struct net_device_stats *)(dev->priv))->rx_over_errors++;
673 /* OK, this look good, so far. Let's see if it's consistent... */
674 /* Let's compute the start of the next packet, based on where we are */
675 pagelink = next_rx_page +
676 ((header_buf.Rx_ByteCount + (4 - 1 + 0x100)) >> 8);
678 /* Are we going to wrap around the page counter? */
679 if (pagelink > last_rx_page)
680 pagelink -= (last_rx_page - first_rx_page + 1);
682 /* Is the _computed_ next page number equal to what the adapter says? */
683 if (pagelink != header_buf.Rx_NextPage) {
684 /* Naah, we'll skip this packet. Probably bogus data as well */
685 printk(KERN_WARNING "%s: Page link out of sync! Restoring...\n", dev->name);
686 next_rx_page = header_buf.Rx_NextPage; /* at least a try... */
687 de620_send_command(dev, W_DUMMY);
688 de620_set_register(dev, W_NPRF, next_rx_page);
689 ((struct net_device_stats *)(dev->priv))->rx_over_errors++;
692 next_rx_page = pagelink;
694 size = header_buf.Rx_ByteCount - 4;
695 if ((size < RUNT) || (GIANT < size)) {
696 printk(KERN_WARNING "%s: Illegal packet size: %d!\n", dev->name, size);
698 else { /* Good packet? */
699 skb = dev_alloc_skb(size+2);
700 if (skb == NULL) { /* Yeah, but no place to put it... */
701 printk(KERN_WARNING "%s: Couldn't allocate a sk_buff of size %d.\n",
703 ((struct net_device_stats *)(dev->priv))->rx_dropped++;
705 else { /* Yep! Go get it! */
706 skb_reserve(skb,2); /* Align */
708 /* skb->data points to the start of sk_buff data area */
709 buffer = skb_put(skb,size);
710 /* copy the packet into the buffer */
711 de620_read_block(dev, buffer, size);
712 PRINTK(("Read %d bytes\n", size));
713 skb->protocol=eth_type_trans(skb,dev);
714 netif_rx(skb); /* deliver it "upstairs" */
715 dev->last_rx = jiffies;
716 /* count all receives */
717 ((struct net_device_stats *)(dev->priv))->rx_packets++;
718 ((struct net_device_stats *)(dev->priv))->rx_bytes += size;
722 /* Let's peek ahead to see if we have read the last current packet */
723 /* NOTE! We're _not_ checking the 'EMPTY'-flag! This seems better... */
724 curr_page = de620_get_register(dev, R_CPR);
725 de620_set_register(dev, W_NPRF, next_rx_page);
726 PRINTK(("next_rx_page=%d CPR=%d\n", next_rx_page, curr_page));
728 return (next_rx_page != curr_page); /* That was slightly tricky... */
731 /*********************************************
733 * Reset the adapter to a known state
736 static int adapter_init(struct net_device *dev)
741 if ((nic_data.Model == 3) || (nic_data.Model == 0)) { /* CT */
743 if (nic_data.Media != 1)
744 EIPRegister |= NIS0; /* not BNC */
746 else if (nic_data.Model == 2) { /* UTP */
747 EIPRegister = NCTL0 | NIS0;
751 EIPRegister = NCTL0 | NIS0;
755 de620_send_command(dev, W_CR | RNOP | CLEAR);
756 de620_send_command(dev, W_CR | RNOP);
758 de620_set_register(dev, W_SCR, SCR_DEF);
759 /* disable recv to wait init */
760 de620_set_register(dev, W_TCR, RXOFF);
762 /* Set the node ID in the adapter */
763 for (i = 0; i < 6; ++i) { /* W_PARn = 0xaa + n */
764 de620_set_register(dev, W_PAR0 + i, dev->dev_addr[i]);
767 de620_set_register(dev, W_EIP, EIPRegister);
769 next_rx_page = first_rx_page = DE620_RX_START_PAGE;
770 if (nic_data.RAM_Size)
771 last_rx_page = nic_data.RAM_Size - 1;
775 de620_set_register(dev, W_SPR, first_rx_page); /* Start Page Register*/
776 de620_set_register(dev, W_EPR, last_rx_page); /* End Page Register */
777 de620_set_register(dev, W_CPR, first_rx_page);/*Current Page Register*/
778 de620_send_command(dev, W_NPR | first_rx_page); /* Next Page Register*/
779 de620_send_command(dev, W_DUMMY);
780 de620_set_delay(dev);
782 /* Final sanity check: Anybody out there? */
783 /* Let's hope some bits from the statusregister make a good check */
784 #define CHECK_MASK ( 0 | TXSUC | T16 | 0 | RXCRC | RXSHORT | 0 | 0 )
785 #define CHECK_OK ( 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 )
786 /* success: X 0 0 X 0 0 X X */
787 /* ignore: EEDI RXGOOD COLS LNKS*/
789 if (((i = de620_get_register(dev, R_STS)) & CHECK_MASK) != CHECK_OK) {
790 printk(KERN_ERR "%s: Something has happened to the DE-620! Please check it"
791 #ifdef SHUTDOWN_WHEN_LOST
792 " and do a new ifconfig"
794 "! (%02x)\n", dev->name, i);
795 #ifdef SHUTDOWN_WHEN_LOST
796 /* Goodbye, cruel world... */
797 dev->flags &= ~IFF_UP;
801 return 1; /* failed */
804 printk(KERN_WARNING "%s: Thanks, I feel much better now!\n", dev->name);
808 /* All OK, go ahead... */
809 de620_set_register(dev, W_TCR, TCR_DEF);
811 return 0; /* all ok */
814 /******************************************************************************
816 * Only start-up code below
819 /****************************************
821 * Check if there is a DE-620 connected
823 int __init de620_probe(struct net_device *dev)
825 static struct net_device_stats de620_netstats;
827 byte checkbyte = 0xa5;
829 SET_MODULE_OWNER(dev);
832 * This is where the base_addr and irq gets set.
833 * Tunable at compile-time and insmod-time
841 printk(KERN_INFO "D-Link DE-620 pocket adapter");
843 /* Initially, configure basic nibble mode, so we can read the EEPROM */
844 NIC_Cmd = DEF_NIC_CMD;
845 de620_set_register(dev, W_EIP, EIPRegister);
847 /* Anybody out there? */
848 de620_set_register(dev, W_CPR, checkbyte);
849 checkbyte = de620_get_register(dev, R_CPR);
851 if ((checkbyte != 0xa5) || (read_eeprom(dev) != 0)) {
852 printk(" not identified in the printer port\n");
856 if (!request_region(dev->base_addr, 3, "de620")) {
857 printk(KERN_ERR "io 0x%3lX, which is busy.\n", dev->base_addr);
862 printk(", Ethernet Address: %2.2X",
863 dev->dev_addr[0] = nic_data.NodeID[0]);
864 for (i = 1; i < ETH_ALEN; i++) {
865 printk(":%2.2X", dev->dev_addr[i] = nic_data.NodeID[i]);
866 dev->broadcast[i] = 0xff;
870 (nic_data.RAM_Size) ? (nic_data.RAM_Size >> 2) : 64);
872 if (nic_data.Media == 1)
877 /* Initialize the device structure. */
878 dev->priv = &de620_netstats;
880 memset(dev->priv, 0, sizeof(struct net_device_stats));
881 dev->get_stats = get_stats;
882 dev->open = de620_open;
883 dev->stop = de620_close;
884 dev->hard_start_xmit = de620_start_xmit;
885 dev->tx_timeout = de620_timeout;
886 dev->watchdog_timeo = HZ*2;
887 dev->set_multicast_list = de620_set_multicast_list;
889 /* base_addr and irq are already set, see above! */
895 printk("\nEEPROM contents:\n");
896 printk("RAM_Size = 0x%02X\n", nic_data.RAM_Size);
897 printk("NodeID = %02X:%02X:%02X:%02X:%02X:%02X\n",
898 nic_data.NodeID[0], nic_data.NodeID[1],
899 nic_data.NodeID[2], nic_data.NodeID[3],
900 nic_data.NodeID[4], nic_data.NodeID[5]);
901 printk("Model = %d\n", nic_data.Model);
902 printk("Media = %d\n", nic_data.Media);
903 printk("SCR = 0x%02x\n", nic_data.SCR);
909 /**********************************
911 * Read info from on-board EEPROM
913 * Note: Bitwise serial I/O to/from the EEPROM vi the status _register_!
915 #define sendit(dev,data) de620_set_register(dev, W_EIP, data | EIPRegister);
917 static unsigned short __init ReadAWord(struct net_device *dev, int from)
922 /* cs [__~~] SET SEND STATE */
925 sendit(dev, 0); sendit(dev, 1); sendit(dev, 5); sendit(dev, 4);
927 /* Send the 9-bit address from where we want to read the 16-bit word */
928 for (nbits = 9; nbits > 0; --nbits, from <<= 1) {
929 if (from & 0x0100) { /* bit set? */
930 /* cs [~~~~] SEND 1 */
933 sendit(dev, 6); sendit(dev, 7); sendit(dev, 7); sendit(dev, 6);
936 /* cs [~~~~] SEND 0 */
939 sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
943 /* Shift in the 16-bit word. The bits appear serially in EEDI (=0x80) */
944 for (data = 0, nbits = 16; nbits > 0; --nbits) {
945 /* cs [~~~~] SEND 0 */
948 sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
949 data = (data << 1) | ((de620_get_register(dev, R_STS) & EEDI) >> 7);
951 /* cs [____] RESET SEND STATE */
954 sendit(dev, 0); sendit(dev, 1); sendit(dev, 1); sendit(dev, 0);
959 static int __init read_eeprom(struct net_device *dev)
963 /* D-Link Ethernet addresses are in the series 00:80:c8:7X:XX:XX:XX */
964 wrd = ReadAWord(dev, 0x1aa); /* bytes 0 + 1 of NodeID */
965 if (!clone && (wrd != htons(0x0080))) /* Valid D-Link ether sequence? */
966 return -1; /* Nope, not a DE-620 */
967 nic_data.NodeID[0] = wrd & 0xff;
968 nic_data.NodeID[1] = wrd >> 8;
970 wrd = ReadAWord(dev, 0x1ab); /* bytes 2 + 3 of NodeID */
971 if (!clone && ((wrd & 0xff) != 0xc8)) /* Valid D-Link ether sequence? */
972 return -1; /* Nope, not a DE-620 */
973 nic_data.NodeID[2] = wrd & 0xff;
974 nic_data.NodeID[3] = wrd >> 8;
976 wrd = ReadAWord(dev, 0x1ac); /* bytes 4 + 5 of NodeID */
977 nic_data.NodeID[4] = wrd & 0xff;
978 nic_data.NodeID[5] = wrd >> 8;
980 wrd = ReadAWord(dev, 0x1ad); /* RAM size in pages (256 bytes). 0 = 64k */
981 nic_data.RAM_Size = (wrd >> 8);
983 wrd = ReadAWord(dev, 0x1ae); /* hardware model (CT = 3) */
984 nic_data.Model = (wrd & 0xff);
986 wrd = ReadAWord(dev, 0x1af); /* media (indicates BNC/UTP) */
987 nic_data.Media = (wrd & 0xff);
989 wrd = ReadAWord(dev, 0x1a8); /* System Configuration Register */
990 nic_data.SCR = (wrd >> 8);
992 return 0; /* no errors */
995 /******************************************************************************
997 * Loadable module skeleton
1001 static struct net_device de620_dev;
1003 int init_module(void)
1005 de620_dev.init = de620_probe;
1006 if (register_netdev(&de620_dev) != 0)
1011 void cleanup_module(void)
1013 unregister_netdev(&de620_dev);
1014 release_region(de620_dev.base_addr, 3);
1017 MODULE_LICENSE("GPL");
1021 * (add '-DMODULE' when compiling as loadable module)
1024 * gcc -D__KERNEL__ -Wall -Wstrict-prototypes -O2 \
1025 * -fomit-frame-pointer -m486 \
1026 * -I/usr/src/linux/include -I../../net/inet -c de620.c
1030 * kernel-compile-command: "gcc -D__KERNEL__ -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
1031 * module-compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"
1032 * compile-command: "gcc -D__KERNEL__ -DMODULE -Ilinux/include -I../../net/inet -Wall -Wstrict-prototypes -O2 -m486 -c de620.c"