2
* de620.c $Revision: 1.40 $ 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.)
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* 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>)
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* Valuable assistance from:
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* J. Joshua Kopper <kopper@rtsg.mot.com>
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* Olav Kvittem <Olav.Kvittem@uninett.no>
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* Germano Caronni <caronni@nessie.cs.id.ethz.ch>
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* Jeremy Fitzhardinge <jeremy@suite.sw.oz.au>
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*****************************************************************************/
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* 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
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* the Free Software Foundation; either version 2, or (at your option)
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* This program is distributed in the hope that it will be useful,
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* 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[] =
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"de620.c: $Revision: 1.40 $, Bjorn Ekwall <bj0rn@blox.se>\n";
44
/***********************************************************************
48
* Compile-time options: (see below for descriptions)
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* -DDE620_IO=0x378 (lpt1)
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* -DDE620_IRQ=7 (lpt1)
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* -DSHUTDOWN_WHEN_LOST
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* This driver assumes that the printer port is a "normal",
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* dumb, uni-directional port!
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* If your port is "fancy" in any way, please try to set it to "normal"
62
* with your BIOS setup. I have no access to machines with bi-directional
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* ports, so I can't test such a driver :-(
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* (Yes, I _know_ it is possible to use DE620 with bidirectional ports...)
66
* There are some clones of DE620 out there, with different names.
67
* If the current driver does not recognize a clone, try to change
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* the following #define to:
70
* #define DE620_CLONE 1
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* If the adapter has problems with high speeds, enable this #define
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* otherwise full printerport speed will be attempted.
78
* You can tune the READ_DELAY/WRITE_DELAY below if you enable LOWSPEED
84
#define READ_DELAY 100 /* adapter internal read delay in 100ns units */
88
#define WRITE_DELAY 100 /* adapter internal write delay in 100ns units */
92
* Enable this #define if you want the adapter to do a "ifconfig down" on
93
* itself when we have detected that something is possibly wrong with it.
94
* The default behaviour is to retry with "adapter_init()" until success.
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* This should be used for debugging purposes only.
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#define SHUTDOWN_WHEN_LOST
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* Enable this #define if you want to see debugging output that show how long
103
* we have to wait before the DE-620 is ready for the next read/write/command.
109
#include <linux/module.h>
110
#include <linux/kernel.h>
111
#include <linux/types.h>
112
#include <linux/fcntl.h>
113
#include <linux/string.h>
114
#include <linux/interrupt.h>
115
#include <linux/ioport.h>
116
#include <linux/in.h>
117
#include <linux/errno.h>
118
#include <linux/init.h>
119
#include <linux/inet.h>
120
#include <linux/netdevice.h>
121
#include <linux/etherdevice.h>
122
#include <linux/skbuff.h>
125
#include <asm/system.h>
127
/* Constant definitions for the DE-620 registers, commands and bits */
130
typedef unsigned char byte;
132
/*******************************************************
134
* Definition of D-Link DE-620 Ethernet Pocket adapter *
135
* See also "de620.h" *
137
*******************************************************/
138
#ifndef DE620_IO /* Compile-time configurable */
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#define DE620_IO 0x378
142
#ifndef DE620_IRQ /* Compile-time configurable */
146
#define DATA_PORT (dev->base_addr)
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#define STATUS_PORT (dev->base_addr + 1)
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#define COMMAND_PORT (dev->base_addr + 2)
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#define RUNT 60 /* Too small Ethernet packet */
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#define GIANT 1514 /* largest legal size packet, no fcs */
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* Force media with insmod:
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* insmod de620.o bnc=1
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* insmod de620.o utp=1
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* Force io and/or irq with insmod:
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* insmod de620.o io=0x378 irq=7
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* Make a clone skip the Ethernet-address range check:
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* insmod de620.o clone=1
167
static int io = DE620_IO;
168
static int irq = DE620_IRQ;
169
static int clone = DE620_CLONE;
171
static spinlock_t de620_lock;
173
module_param(bnc, int, 0);
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module_param(utp, int, 0);
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module_param(io, int, 0);
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module_param(irq, int, 0);
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module_param(clone, int, 0);
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MODULE_PARM_DESC(bnc, "DE-620 set BNC medium (0-1)");
179
MODULE_PARM_DESC(utp, "DE-620 set UTP medium (0-1)");
180
MODULE_PARM_DESC(io, "DE-620 I/O base address,required");
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MODULE_PARM_DESC(irq, "DE-620 IRQ number,required");
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MODULE_PARM_DESC(clone, "Check also for non-D-Link DE-620 clones (0-1)");
184
/***********************************************
186
* Index to functions, as function prototypes. *
188
***********************************************/
191
* Routines used internally. (See also "convenience macros.. below")
194
/* Put in the device structure. */
195
static int de620_open(struct net_device *);
196
static int de620_close(struct net_device *);
197
static void de620_set_multicast_list(struct net_device *);
198
static int de620_start_xmit(struct sk_buff *, struct net_device *);
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/* Dispatch from interrupts. */
201
static irqreturn_t de620_interrupt(int, void *);
202
static int de620_rx_intr(struct net_device *);
205
static int adapter_init(struct net_device *);
206
static int read_eeprom(struct net_device *);
210
* D-Link driver variables:
212
#define SCR_DEF NIBBLEMODE |INTON | SLEEP | AUTOTX
213
#define TCR_DEF RXPB /* not used: | TXSUCINT | T16INT */
214
#define DE620_RX_START_PAGE 12 /* 12 pages (=3k) reserved for tx */
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#define DEF_NIC_CMD IRQEN | ICEN | DS1
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static volatile byte NIC_Cmd;
218
static volatile byte next_rx_page;
219
static byte first_rx_page;
220
static byte last_rx_page;
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static byte EIPRegister;
231
/**********************************************************
233
* Convenience macros/functions for D-Link DE-620 adapter *
235
**********************************************************/
236
#define de620_tx_buffs(dd) (inb(STATUS_PORT) & (TXBF0 | TXBF1))
237
#define de620_flip_ds(dd) NIC_Cmd ^= DS0 | DS1; outb(NIC_Cmd, COMMAND_PORT);
239
/* Check for ready-status, and return a nibble (high 4 bits) for data input */
244
de620_ready(struct net_device *dev)
247
register short int cnt = 0;
249
while ((((value = inb(STATUS_PORT)) & READY) == 0) && (cnt <= 1000))
255
return value & 0xf0; /* nibble */
259
de620_send_command(struct net_device *dev, byte cmd)
263
outb(NIC_Cmd, COMMAND_PORT);
265
outb(cmd, DATA_PORT);
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outb(NIC_Cmd ^ CS0, COMMAND_PORT);
269
outb(NIC_Cmd, COMMAND_PORT);
273
de620_put_byte(struct net_device *dev, byte value)
275
/* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
277
outb(value, DATA_PORT);
282
de620_read_byte(struct net_device *dev)
286
/* The de620_ready() makes 7 loops, on the average, on a DX2/66 */
287
value = de620_ready(dev); /* High nibble */
289
value |= de620_ready(dev) >> 4; /* Low nibble */
294
de620_write_block(struct net_device *dev, byte *buffer, int count, int pad)
297
byte uflip = NIC_Cmd ^ (DS0 | DS1);
298
byte dflip = NIC_Cmd;
302
#endif /* COUNT_LOOPS */
303
#endif /* LOWSPEED */
308
#endif /* COUNT_LOOPS */
309
/* No further optimization useful, the limit is in the adapter. */
310
for ( ; count > 0; --count, ++buffer) {
311
de620_put_byte(dev,*buffer);
313
for ( count = pad ; count > 0; --count, ++buffer) {
314
de620_put_byte(dev, 0);
316
de620_send_command(dev,W_DUMMY);
318
/* trial debug output: loops per byte in de620_ready() */
319
printk("WRITE(%d)\n", tot_cnt/((bytes?bytes:1)));
320
#endif /* COUNT_LOOPS */
321
#else /* not LOWSPEED */
322
for ( ; count > 0; count -=2) {
323
outb(*buffer++, DATA_PORT);
324
outb(uflip, COMMAND_PORT);
325
outb(*buffer++, DATA_PORT);
326
outb(dflip, COMMAND_PORT);
328
de620_send_command(dev,W_DUMMY);
329
#endif /* LOWSPEED */
333
de620_read_block(struct net_device *dev, byte *data, int count)
337
byte uflip = NIC_Cmd ^ (DS0 | DS1);
338
byte dflip = NIC_Cmd;
344
#endif /* COUNT_LOOPS */
345
#endif /* LOWSPEED */
348
/* No further optimization useful, the limit is in the adapter. */
349
while (count-- > 0) {
350
*data++ = de620_read_byte(dev);
354
/* trial debug output: loops per byte in de620_ready() */
355
printk("READ(%d)\n", tot_cnt/(2*(bytes?bytes:1)));
356
#endif /* COUNT_LOOPS */
357
#else /* not LOWSPEED */
358
while (count-- > 0) {
359
value = inb(STATUS_PORT) & 0xf0; /* High nibble */
360
outb(uflip, COMMAND_PORT);
361
*data++ = value | inb(STATUS_PORT) >> 4; /* Low nibble */
362
outb(dflip , COMMAND_PORT);
364
#endif /* LOWSPEED */
368
de620_set_delay(struct net_device *dev)
371
outb(W_DFR, DATA_PORT);
372
outb(NIC_Cmd ^ CS0, COMMAND_PORT);
376
outb(WRITE_DELAY, DATA_PORT);
384
outb(READ_DELAY, DATA_PORT);
392
de620_set_register(struct net_device *dev, byte reg, byte value)
395
outb(reg, DATA_PORT);
396
outb(NIC_Cmd ^ CS0, COMMAND_PORT);
398
de620_put_byte(dev, value);
402
de620_get_register(struct net_device *dev, byte reg)
406
de620_send_command(dev,reg);
407
value = de620_read_byte(dev);
408
de620_send_command(dev,W_DUMMY);
413
/*********************************************************************
415
* Open/initialize the board.
417
* This routine should set everything up anew at each open, even
418
* registers that "should" only need to be set once at boot, so that
419
* there is a non-reboot way to recover if something goes wrong.
422
static int de620_open(struct net_device *dev)
424
int ret = request_irq(dev->irq, de620_interrupt, 0, dev->name, dev);
426
printk (KERN_ERR "%s: unable to get IRQ %d\n", dev->name, dev->irq);
430
if (adapter_init(dev)) {
435
netif_start_queue(dev);
439
free_irq(dev->irq, dev);
443
/************************************************
445
* The inverse routine to de620_open().
449
static int de620_close(struct net_device *dev)
451
netif_stop_queue(dev);
453
de620_set_register(dev, W_TCR, RXOFF);
454
free_irq(dev->irq, dev);
458
/*********************************************
460
* Set or clear the multicast filter for this adaptor.
461
* (no real multicast implemented for the DE-620, but she can be promiscuous...)
465
static void de620_set_multicast_list(struct net_device *dev)
467
if (!netdev_mc_empty(dev) || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
468
{ /* Enable promiscuous mode */
469
de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
472
{ /* Disable promiscuous mode, use normal mode */
473
de620_set_register(dev, W_TCR, TCR_DEF);
477
/*******************************************************
479
* Handle timeouts on transmit
482
static void de620_timeout(struct net_device *dev)
484
printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name, "network cable problem");
485
/* Restart the adapter. */
486
if (!adapter_init(dev)) /* maybe close it */
487
netif_wake_queue(dev);
490
/*******************************************************
492
* Copy a buffer to the adapter transmit page memory.
495
static int de620_start_xmit(struct sk_buff *skb, struct net_device *dev)
499
byte *buffer = skb->data;
502
using_txbuf = de620_tx_buffs(dev); /* Peek at the adapter */
504
netif_stop_queue(dev);
507
if ((len = skb->len) < RUNT)
509
if (len & 1) /* send an even number of bytes */
512
/* Start real output */
514
spin_lock_irqsave(&de620_lock, flags);
515
pr_debug("de620_start_xmit: len=%d, bufs 0x%02x\n",
516
(int)skb->len, using_txbuf);
518
/* select a free tx buffer. if there is one... */
519
switch (using_txbuf) {
520
default: /* both are free: use TXBF0 */
521
case TXBF1: /* use TXBF0 */
522
de620_send_command(dev,W_CR | RW0);
523
using_txbuf |= TXBF0;
526
case TXBF0: /* use TXBF1 */
527
de620_send_command(dev,W_CR | RW1);
528
using_txbuf |= TXBF1;
531
case (TXBF0 | TXBF1): /* NONE!!! */
532
printk(KERN_WARNING "%s: No tx-buffer available!\n", dev->name);
533
spin_unlock_irqrestore(&de620_lock, flags);
534
return NETDEV_TX_BUSY;
536
de620_write_block(dev, buffer, skb->len, len-skb->len);
538
if(!(using_txbuf == (TXBF0 | TXBF1)))
539
netif_wake_queue(dev);
541
dev->stats.tx_packets++;
542
spin_unlock_irqrestore(&de620_lock, flags);
547
/*****************************************************
549
* Handle the network interface interrupts.
553
de620_interrupt(int irq_in, void *dev_id)
555
struct net_device *dev = dev_id;
560
spin_lock(&de620_lock);
562
/* Read the status register (_not_ the status port) */
563
irq_status = de620_get_register(dev, R_STS);
565
pr_debug("de620_interrupt (%2.2X)\n", irq_status);
567
if (irq_status & RXGOOD) {
569
again = de620_rx_intr(dev);
570
pr_debug("again=%d\n", again);
572
while (again && (++bogus_count < 100));
575
if(de620_tx_buffs(dev) != (TXBF0 | TXBF1))
576
netif_wake_queue(dev);
578
spin_unlock(&de620_lock);
582
/**************************************
584
* Get a packet from the adapter
589
static int de620_rx_intr(struct net_device *dev)
594
unsigned short Rx_ByteCount;
602
pr_debug("de620_rx_intr: next_rx_page = %d\n", next_rx_page);
604
/* Tell the adapter that we are going to read data, and from where */
605
de620_send_command(dev, W_CR | RRN);
606
de620_set_register(dev, W_RSA1, next_rx_page);
607
de620_set_register(dev, W_RSA0, 0);
609
/* Deep breath, and away we goooooo */
610
de620_read_block(dev, (byte *)&header_buf, sizeof(struct header_buf));
611
pr_debug("page status=0x%02x, nextpage=%d, packetsize=%d\n",
612
header_buf.status, header_buf.Rx_NextPage,
613
header_buf.Rx_ByteCount);
615
/* Plausible page header? */
616
pagelink = header_buf.Rx_NextPage;
617
if ((pagelink < first_rx_page) || (last_rx_page < pagelink)) {
618
/* Ouch... Forget it! Skip all and start afresh... */
619
printk(KERN_WARNING "%s: Ring overrun? Restoring...\n", dev->name);
620
/* You win some, you lose some. And sometimes plenty... */
622
netif_wake_queue(dev);
623
dev->stats.rx_over_errors++;
627
/* OK, this look good, so far. Let's see if it's consistent... */
628
/* Let's compute the start of the next packet, based on where we are */
629
pagelink = next_rx_page +
630
((header_buf.Rx_ByteCount + (4 - 1 + 0x100)) >> 8);
632
/* Are we going to wrap around the page counter? */
633
if (pagelink > last_rx_page)
634
pagelink -= (last_rx_page - first_rx_page + 1);
636
/* Is the _computed_ next page number equal to what the adapter says? */
637
if (pagelink != header_buf.Rx_NextPage) {
638
/* Naah, we'll skip this packet. Probably bogus data as well */
639
printk(KERN_WARNING "%s: Page link out of sync! Restoring...\n", dev->name);
640
next_rx_page = header_buf.Rx_NextPage; /* at least a try... */
641
de620_send_command(dev, W_DUMMY);
642
de620_set_register(dev, W_NPRF, next_rx_page);
643
dev->stats.rx_over_errors++;
646
next_rx_page = pagelink;
648
size = header_buf.Rx_ByteCount - 4;
649
if ((size < RUNT) || (GIANT < size)) {
650
printk(KERN_WARNING "%s: Illegal packet size: %d!\n", dev->name, size);
652
else { /* Good packet? */
653
skb = dev_alloc_skb(size+2);
654
if (skb == NULL) { /* Yeah, but no place to put it... */
655
printk(KERN_WARNING "%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, size);
656
dev->stats.rx_dropped++;
658
else { /* Yep! Go get it! */
659
skb_reserve(skb,2); /* Align */
660
/* skb->data points to the start of sk_buff data area */
661
buffer = skb_put(skb,size);
662
/* copy the packet into the buffer */
663
de620_read_block(dev, buffer, size);
664
pr_debug("Read %d bytes\n", size);
665
skb->protocol=eth_type_trans(skb,dev);
666
netif_rx(skb); /* deliver it "upstairs" */
667
/* count all receives */
668
dev->stats.rx_packets++;
669
dev->stats.rx_bytes += size;
673
/* Let's peek ahead to see if we have read the last current packet */
674
/* NOTE! We're _not_ checking the 'EMPTY'-flag! This seems better... */
675
curr_page = de620_get_register(dev, R_CPR);
676
de620_set_register(dev, W_NPRF, next_rx_page);
677
pr_debug("next_rx_page=%d CPR=%d\n", next_rx_page, curr_page);
679
return next_rx_page != curr_page; /* That was slightly tricky... */
682
/*********************************************
684
* Reset the adapter to a known state
687
static int adapter_init(struct net_device *dev)
692
if ((nic_data.Model == 3) || (nic_data.Model == 0)) { /* CT */
694
if (nic_data.Media != 1)
695
EIPRegister |= NIS0; /* not BNC */
697
else if (nic_data.Model == 2) { /* UTP */
698
EIPRegister = NCTL0 | NIS0;
702
EIPRegister = NCTL0 | NIS0;
706
de620_send_command(dev, W_CR | RNOP | CLEAR);
707
de620_send_command(dev, W_CR | RNOP);
709
de620_set_register(dev, W_SCR, SCR_DEF);
710
/* disable recv to wait init */
711
de620_set_register(dev, W_TCR, RXOFF);
713
/* Set the node ID in the adapter */
714
for (i = 0; i < 6; ++i) { /* W_PARn = 0xaa + n */
715
de620_set_register(dev, W_PAR0 + i, dev->dev_addr[i]);
718
de620_set_register(dev, W_EIP, EIPRegister);
720
next_rx_page = first_rx_page = DE620_RX_START_PAGE;
721
if (nic_data.RAM_Size)
722
last_rx_page = nic_data.RAM_Size - 1;
726
de620_set_register(dev, W_SPR, first_rx_page); /* Start Page Register*/
727
de620_set_register(dev, W_EPR, last_rx_page); /* End Page Register */
728
de620_set_register(dev, W_CPR, first_rx_page);/*Current Page Register*/
729
de620_send_command(dev, W_NPR | first_rx_page); /* Next Page Register*/
730
de620_send_command(dev, W_DUMMY);
731
de620_set_delay(dev);
733
/* Final sanity check: Anybody out there? */
734
/* Let's hope some bits from the statusregister make a good check */
735
#define CHECK_MASK ( 0 | TXSUC | T16 | 0 | RXCRC | RXSHORT | 0 | 0 )
736
#define CHECK_OK ( 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 )
737
/* success: X 0 0 X 0 0 X X */
738
/* ignore: EEDI RXGOOD COLS LNKS*/
740
if (((i = de620_get_register(dev, R_STS)) & CHECK_MASK) != CHECK_OK) {
741
printk(KERN_ERR "%s: Something has happened to the DE-620! Please check it"
742
#ifdef SHUTDOWN_WHEN_LOST
743
" and do a new ifconfig"
745
"! (%02x)\n", dev->name, i);
746
#ifdef SHUTDOWN_WHEN_LOST
747
/* Goodbye, cruel world... */
748
dev->flags &= ~IFF_UP;
752
return 1; /* failed */
755
printk(KERN_WARNING "%s: Thanks, I feel much better now!\n", dev->name);
759
/* All OK, go ahead... */
760
de620_set_register(dev, W_TCR, TCR_DEF);
762
return 0; /* all ok */
765
static const struct net_device_ops de620_netdev_ops = {
766
.ndo_open = de620_open,
767
.ndo_stop = de620_close,
768
.ndo_start_xmit = de620_start_xmit,
769
.ndo_tx_timeout = de620_timeout,
770
.ndo_set_rx_mode = de620_set_multicast_list,
771
.ndo_change_mtu = eth_change_mtu,
772
.ndo_set_mac_address = eth_mac_addr,
773
.ndo_validate_addr = eth_validate_addr,
776
/******************************************************************************
778
* Only start-up code below
781
/****************************************
783
* Check if there is a DE-620 connected
785
struct net_device * __init de620_probe(int unit)
787
byte checkbyte = 0xa5;
788
struct net_device *dev;
792
dev = alloc_etherdev(0);
796
spin_lock_init(&de620_lock);
799
* This is where the base_addr and irq gets set.
800
* Tunable at compile-time and insmod-time
805
/* allow overriding parameters on command line */
807
sprintf(dev->name, "eth%d", unit);
808
netdev_boot_setup_check(dev);
811
pr_debug("%s", version);
813
printk(KERN_INFO "D-Link DE-620 pocket adapter");
815
if (!request_region(dev->base_addr, 3, "de620")) {
816
printk(" io 0x%3lX, which is busy.\n", dev->base_addr);
821
/* Initially, configure basic nibble mode, so we can read the EEPROM */
822
NIC_Cmd = DEF_NIC_CMD;
823
de620_set_register(dev, W_EIP, EIPRegister);
825
/* Anybody out there? */
826
de620_set_register(dev, W_CPR, checkbyte);
827
checkbyte = de620_get_register(dev, R_CPR);
829
if ((checkbyte != 0xa5) || (read_eeprom(dev) != 0)) {
830
printk(" not identified in the printer port\n");
836
dev->dev_addr[0] = nic_data.NodeID[0];
837
for (i = 1; i < ETH_ALEN; i++) {
838
dev->dev_addr[i] = nic_data.NodeID[i];
839
dev->broadcast[i] = 0xff;
842
printk(", Ethernet Address: %pM", dev->dev_addr);
845
(nic_data.RAM_Size) ? (nic_data.RAM_Size >> 2) : 64);
847
if (nic_data.Media == 1)
852
dev->netdev_ops = &de620_netdev_ops;
853
dev->watchdog_timeo = HZ*2;
855
/* base_addr and irq are already set, see above! */
858
pr_debug("\nEEPROM contents:\n"
859
"RAM_Size = 0x%02X\n"
863
"SCR = 0x%02x\n", nic_data.RAM_Size, nic_data.NodeID,
864
nic_data.Model, nic_data.Media, nic_data.SCR);
866
err = register_netdev(dev);
872
release_region(dev->base_addr, 3);
879
/**********************************
881
* Read info from on-board EEPROM
883
* Note: Bitwise serial I/O to/from the EEPROM vi the status _register_!
885
#define sendit(dev,data) de620_set_register(dev, W_EIP, data | EIPRegister);
887
static unsigned short __init ReadAWord(struct net_device *dev, int from)
892
/* cs [__~~] SET SEND STATE */
895
sendit(dev, 0); sendit(dev, 1); sendit(dev, 5); sendit(dev, 4);
897
/* Send the 9-bit address from where we want to read the 16-bit word */
898
for (nbits = 9; nbits > 0; --nbits, from <<= 1) {
899
if (from & 0x0100) { /* bit set? */
900
/* cs [~~~~] SEND 1 */
903
sendit(dev, 6); sendit(dev, 7); sendit(dev, 7); sendit(dev, 6);
906
/* cs [~~~~] SEND 0 */
909
sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
913
/* Shift in the 16-bit word. The bits appear serially in EEDI (=0x80) */
914
for (data = 0, nbits = 16; nbits > 0; --nbits) {
915
/* cs [~~~~] SEND 0 */
918
sendit(dev, 4); sendit(dev, 5); sendit(dev, 5); sendit(dev, 4);
919
data = (data << 1) | ((de620_get_register(dev, R_STS) & EEDI) >> 7);
921
/* cs [____] RESET SEND STATE */
924
sendit(dev, 0); sendit(dev, 1); sendit(dev, 1); sendit(dev, 0);
929
static int __init read_eeprom(struct net_device *dev)
933
/* D-Link Ethernet addresses are in the series 00:80:c8:7X:XX:XX:XX */
934
wrd = ReadAWord(dev, 0x1aa); /* bytes 0 + 1 of NodeID */
935
if (!clone && (wrd != htons(0x0080))) /* Valid D-Link ether sequence? */
936
return -1; /* Nope, not a DE-620 */
937
nic_data.NodeID[0] = wrd & 0xff;
938
nic_data.NodeID[1] = wrd >> 8;
940
wrd = ReadAWord(dev, 0x1ab); /* bytes 2 + 3 of NodeID */
941
if (!clone && ((wrd & 0xff) != 0xc8)) /* Valid D-Link ether sequence? */
942
return -1; /* Nope, not a DE-620 */
943
nic_data.NodeID[2] = wrd & 0xff;
944
nic_data.NodeID[3] = wrd >> 8;
946
wrd = ReadAWord(dev, 0x1ac); /* bytes 4 + 5 of NodeID */
947
nic_data.NodeID[4] = wrd & 0xff;
948
nic_data.NodeID[5] = wrd >> 8;
950
wrd = ReadAWord(dev, 0x1ad); /* RAM size in pages (256 bytes). 0 = 64k */
951
nic_data.RAM_Size = (wrd >> 8);
953
wrd = ReadAWord(dev, 0x1ae); /* hardware model (CT = 3) */
954
nic_data.Model = (wrd & 0xff);
956
wrd = ReadAWord(dev, 0x1af); /* media (indicates BNC/UTP) */
957
nic_data.Media = (wrd & 0xff);
959
wrd = ReadAWord(dev, 0x1a8); /* System Configuration Register */
960
nic_data.SCR = (wrd >> 8);
962
return 0; /* no errors */
965
/******************************************************************************
967
* Loadable module skeleton
971
static struct net_device *de620_dev;
973
int __init init_module(void)
975
de620_dev = de620_probe(-1);
976
if (IS_ERR(de620_dev))
977
return PTR_ERR(de620_dev);
981
void cleanup_module(void)
983
unregister_netdev(de620_dev);
984
release_region(de620_dev->base_addr, 3);
985
free_netdev(de620_dev);
988
MODULE_LICENSE("GPL");