1
/* atarilance.c: Ethernet driver for VME Lance cards on the Atari */
3
Written 1995/96 by Roman Hodek (Roman.Hodek@informatik.uni-erlangen.de)
5
This software may be used and distributed according to the terms
6
of the GNU General Public License, incorporated herein by reference.
8
This drivers was written with the following sources of reference:
9
- The driver for the Riebl Lance card by the TU Vienna.
10
- The modified TUW driver for PAM's VME cards
11
- The PC-Linux driver for Lance cards (but this is for bus master
12
cards, not the shared memory ones)
13
- The Amiga Ariadne driver
15
v1.0: (in 1.2.13pl4/0.9.13)
19
deleted some debugging stuff
20
optimized register access (keep AREG pointing to CSR0)
21
following AMD, CSR0_STRT should be set only after IDON is detected
22
use memcpy() for data transfers, that also employs long word moves
23
better probe procedure for 24-bit systems
24
non-VME-RieblCards need extra delays in memcpy
25
must also do write test, since 0xfxe00000 may hit ROM
26
use 8/32 tx/rx buffers, which should give better NFS performance;
27
this is made possible by shifting the last packet buffer after the
28
RieblCard reserved area
30
again fixed probing for the Falcon; 0xfe01000 hits phys. 0x00010000
31
and thus RAM, in case of no Lance found all memory contents have to
33
Now possible to compile as module.
34
v1.3: 03/30/96 Jes Sorensen, Roman (in 1.3)
35
Several little 1.3 adaptions
36
When the lance is stopped it jumps back into little-endian
37
mode. It is therefore necessary to put it back where it
38
belongs, in big endian mode, in order to make things work.
39
This might be the reason why multicast-mode didn't work
40
before, but I'm not able to test it as I only got an Amiga
41
(we had similar problems with the A2065 driver).
45
static char version[] = "atarilance.c: v1.3 04/04/96 "
46
"Roman.Hodek@informatik.uni-erlangen.de\n";
48
#include <linux/netdevice.h>
49
#include <linux/etherdevice.h>
50
#include <linux/module.h>
51
#include <linux/stddef.h>
52
#include <linux/kernel.h>
53
#include <linux/string.h>
54
#include <linux/errno.h>
55
#include <linux/skbuff.h>
56
#include <linux/interrupt.h>
57
#include <linux/init.h>
58
#include <linux/bitops.h>
60
#include <asm/setup.h>
62
#include <asm/atarihw.h>
63
#include <asm/atariints.h>
67
* 0 = silent, print only serious errors
68
* 1 = normal, print error messages
69
* 2 = debug, print debug infos
70
* 3 = debug, print even more debug infos (packet data)
76
static int lance_debug = LANCE_DEBUG;
78
static int lance_debug = 1;
80
module_param(lance_debug, int, 0);
81
MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)");
82
MODULE_LICENSE("GPL");
84
/* Print debug messages on probing? */
85
#undef LANCE_DEBUG_PROBE
87
#define DPRINTK(n,a) \
89
if (lance_debug >= n) \
93
#ifdef LANCE_DEBUG_PROBE
94
# define PROBE_PRINT(a) printk a
96
# define PROBE_PRINT(a)
99
/* These define the number of Rx and Tx buffers as log2. (Only powers
101
* Much more rx buffers (32) are reserved than tx buffers (8), since receiving
102
* is more time critical then sending and packets may have to remain in the
103
* board's memory when main memory is low.
106
#define TX_LOG_RING_SIZE 3
107
#define RX_LOG_RING_SIZE 5
109
/* These are the derived values */
111
#define TX_RING_SIZE (1 << TX_LOG_RING_SIZE)
112
#define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5)
113
#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
115
#define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
116
#define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
117
#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
119
#define TX_TIMEOUT (HZ/5)
121
/* The LANCE Rx and Tx ring descriptors. */
122
struct lance_rx_head {
123
unsigned short base; /* Low word of base addr */
124
volatile unsigned char flag;
125
unsigned char base_hi; /* High word of base addr (unused) */
126
short buf_length; /* This length is 2s complement! */
127
volatile short msg_length; /* This length is "normal". */
130
struct lance_tx_head {
131
unsigned short base; /* Low word of base addr */
132
volatile unsigned char flag;
133
unsigned char base_hi; /* High word of base addr (unused) */
134
short length; /* Length is 2s complement! */
139
unsigned short adr_lo; /* Low 16 bits of address */
140
unsigned char len; /* Length bits */
141
unsigned char adr_hi; /* High 8 bits of address (unused) */
144
/* The LANCE initialization block, described in databook. */
145
struct lance_init_block {
146
unsigned short mode; /* Pre-set mode */
147
unsigned char hwaddr[6]; /* Physical ethernet address */
148
unsigned filter[2]; /* Multicast filter (unused). */
149
/* Receive and transmit ring base, along with length bits. */
150
struct ringdesc rx_ring;
151
struct ringdesc tx_ring;
154
/* The whole layout of the Lance shared memory */
155
struct lance_memory {
156
struct lance_init_block init;
157
struct lance_tx_head tx_head[TX_RING_SIZE];
158
struct lance_rx_head rx_head[RX_RING_SIZE];
159
char packet_area[0]; /* packet data follow after the
160
* init block and the ring
161
* descriptors and are located
165
/* RieblCard specifics:
166
* The original TOS driver for these cards reserves the area from offset
167
* 0xee70 to 0xeebb for storing configuration data. Of interest to us is the
168
* Ethernet address there, and the magic for verifying the data's validity.
169
* The reserved area isn't touch by packet buffers. Furthermore, offset 0xfffe
170
* is reserved for the interrupt vector number.
172
#define RIEBL_RSVD_START 0xee70
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#define RIEBL_RSVD_END 0xeec0
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#define RIEBL_MAGIC 0x09051990
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#define RIEBL_MAGIC_ADDR ((unsigned long *)(((char *)MEM) + 0xee8a))
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#define RIEBL_HWADDR_ADDR ((unsigned char *)(((char *)MEM) + 0xee8e))
177
#define RIEBL_IVEC_ADDR ((unsigned short *)(((char *)MEM) + 0xfffe))
179
/* This is a default address for the old RieblCards without a battery
180
* that have no ethernet address at boot time. 00:00:36:04 is the
181
* prefix for Riebl cards, the 00:00 at the end is arbitrary.
184
static unsigned char OldRieblDefHwaddr[6] = {
185
0x00, 0x00, 0x36, 0x04, 0x00, 0x00
189
/* I/O registers of the Lance chip */
192
/* base+0x0 */ volatile unsigned short data;
193
/* base+0x2 */ volatile unsigned short addr;
194
unsigned char _dummy1[3];
195
/* base+0x7 */ volatile unsigned char ivec;
196
unsigned char _dummy2[5];
197
/* base+0xd */ volatile unsigned char eeprom;
198
unsigned char _dummy3;
199
/* base+0xf */ volatile unsigned char mem;
202
/* Types of boards this driver supports */
205
OLD_RIEBL, /* old Riebl card without battery */
206
NEW_RIEBL, /* new Riebl card with battery */
207
PAM_CARD /* PAM card with EEPROM */
210
static char *lance_names[] = {
211
"Riebl-Card (without battery)",
212
"Riebl-Card (with battery)",
216
/* The driver's private device structure */
218
struct lance_private {
219
enum lance_type cardtype;
220
struct lance_ioreg *iobase;
221
struct lance_memory *mem;
222
int cur_rx, cur_tx; /* The next free ring entry */
223
int dirty_tx; /* Ring entries to be freed. */
225
void *(*memcpy_f)( void *, const void *, size_t );
226
/* This must be long for set_bit() */
231
/* I/O register access macros */
234
#define DREG IO->data
235
#define AREG IO->addr
236
#define REGA(a) (*( AREG = (a), &DREG ))
238
/* Definitions for packet buffer access: */
239
#define PKT_BUF_SZ 1544
240
/* Get the address of a packet buffer corresponding to a given buffer head */
241
#define PKTBUF_ADDR(head) (((unsigned char *)(MEM)) + (head)->base)
243
/* Possible memory/IO addresses for probing */
245
static struct lance_addr {
246
unsigned long memaddr;
247
unsigned long ioaddr;
249
} lance_addr_list[] = {
250
{ 0xfe010000, 0xfe00fff0, 0 }, /* RieblCard VME in TT */
251
{ 0xffc10000, 0xffc0fff0, 0 }, /* RieblCard VME in MegaSTE
252
(highest byte stripped) */
253
{ 0xffe00000, 0xffff7000, 1 }, /* RieblCard in ST
254
(highest byte stripped) */
255
{ 0xffd00000, 0xffff7000, 1 }, /* RieblCard in ST with hw modif. to
256
avoid conflict with ROM
257
(highest byte stripped) */
258
{ 0xffcf0000, 0xffcffff0, 0 }, /* PAMCard VME in TT and MSTE
259
(highest byte stripped) */
260
{ 0xfecf0000, 0xfecffff0, 0 }, /* Rhotron's PAMCard VME in TT and MSTE
261
(highest byte stripped) */
264
#define N_LANCE_ADDR ARRAY_SIZE(lance_addr_list)
267
/* Definitions for the Lance */
270
#define TMD1_ENP 0x01 /* end of packet */
271
#define TMD1_STP 0x02 /* start of packet */
272
#define TMD1_DEF 0x04 /* deferred */
273
#define TMD1_ONE 0x08 /* one retry needed */
274
#define TMD1_MORE 0x10 /* more than one retry needed */
275
#define TMD1_ERR 0x40 /* error summary */
276
#define TMD1_OWN 0x80 /* ownership (set: chip owns) */
278
#define TMD1_OWN_CHIP TMD1_OWN
279
#define TMD1_OWN_HOST 0
281
/* tx_head misc field */
282
#define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */
283
#define TMD3_RTRY 0x0400 /* failed after 16 retries */
284
#define TMD3_LCAR 0x0800 /* carrier lost */
285
#define TMD3_LCOL 0x1000 /* late collision */
286
#define TMD3_UFLO 0x4000 /* underflow (late memory) */
287
#define TMD3_BUFF 0x8000 /* buffering error (no ENP) */
290
#define RMD1_ENP 0x01 /* end of packet */
291
#define RMD1_STP 0x02 /* start of packet */
292
#define RMD1_BUFF 0x04 /* buffer error */
293
#define RMD1_CRC 0x08 /* CRC error */
294
#define RMD1_OFLO 0x10 /* overflow */
295
#define RMD1_FRAM 0x20 /* framing error */
296
#define RMD1_ERR 0x40 /* error summary */
297
#define RMD1_OWN 0x80 /* ownership (set: ship owns) */
299
#define RMD1_OWN_CHIP RMD1_OWN
300
#define RMD1_OWN_HOST 0
303
#define CSR0 0 /* mode/status */
304
#define CSR1 1 /* init block addr (low) */
305
#define CSR2 2 /* init block addr (high) */
306
#define CSR3 3 /* misc */
307
#define CSR8 8 /* address filter */
308
#define CSR15 15 /* promiscuous mode */
311
/* (R=readable, W=writeable, S=set on write, C=clear on write) */
312
#define CSR0_INIT 0x0001 /* initialize (RS) */
313
#define CSR0_STRT 0x0002 /* start (RS) */
314
#define CSR0_STOP 0x0004 /* stop (RS) */
315
#define CSR0_TDMD 0x0008 /* transmit demand (RS) */
316
#define CSR0_TXON 0x0010 /* transmitter on (R) */
317
#define CSR0_RXON 0x0020 /* receiver on (R) */
318
#define CSR0_INEA 0x0040 /* interrupt enable (RW) */
319
#define CSR0_INTR 0x0080 /* interrupt active (R) */
320
#define CSR0_IDON 0x0100 /* initialization done (RC) */
321
#define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */
322
#define CSR0_RINT 0x0400 /* receiver interrupt (RC) */
323
#define CSR0_MERR 0x0800 /* memory error (RC) */
324
#define CSR0_MISS 0x1000 /* missed frame (RC) */
325
#define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */
326
#define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */
327
#define CSR0_ERR 0x8000 /* error (RC) */
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#define CSR3_BCON 0x0001 /* byte control */
331
#define CSR3_ACON 0x0002 /* ALE control */
332
#define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
336
/***************************** Prototypes *****************************/
338
static unsigned long lance_probe1( struct net_device *dev, struct lance_addr
340
static int lance_open( struct net_device *dev );
341
static void lance_init_ring( struct net_device *dev );
342
static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev );
343
static irqreturn_t lance_interrupt( int irq, void *dev_id );
344
static int lance_rx( struct net_device *dev );
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static int lance_close( struct net_device *dev );
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static void set_multicast_list( struct net_device *dev );
347
static int lance_set_mac_address( struct net_device *dev, void *addr );
348
static void lance_tx_timeout (struct net_device *dev);
350
/************************* End of Prototypes **************************/
356
static void *slow_memcpy( void *dst, const void *src, size_t len )
359
const char *cfrom = src;
369
struct net_device * __init atarilance_probe(int unit)
373
struct net_device *dev;
376
if (!MACH_IS_ATARI || found)
377
/* Assume there's only one board possible... That seems true, since
378
* the Riebl/PAM board's address cannot be changed. */
379
return ERR_PTR(-ENODEV);
381
dev = alloc_etherdev(sizeof(struct lance_private));
383
return ERR_PTR(-ENOMEM);
385
sprintf(dev->name, "eth%d", unit);
386
netdev_boot_setup_check(dev);
389
for( i = 0; i < N_LANCE_ADDR; ++i ) {
390
if (lance_probe1( dev, &lance_addr_list[i] )) {
392
err = register_netdev(dev);
395
free_irq(dev->irq, dev);
404
/* Derived from hwreg_present() in atari/config.c: */
406
static noinline int __init addr_accessible(volatile void *regp, int wordflag,
411
long *vbr, save_berr;
413
local_irq_save(flags);
415
__asm__ __volatile__ ( "movec %/vbr,%0" : "=r" (vbr) : );
419
( "movel %/sp,%/d1\n\t"
420
"movel #Lberr,%2@\n\t"
427
"1: movew %1@,%/d0\n\t"
443
"Lberr: movel %/d1,%/sp"
445
: "a" (regp), "a" (&vbr[2]), "rm" (wordflag), "rm" (writeflag)
446
: "d0", "d1", "memory"
450
local_irq_restore(flags);
455
static const struct net_device_ops lance_netdev_ops = {
456
.ndo_open = lance_open,
457
.ndo_stop = lance_close,
458
.ndo_start_xmit = lance_start_xmit,
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.ndo_set_rx_mode = set_multicast_list,
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.ndo_set_mac_address = lance_set_mac_address,
461
.ndo_tx_timeout = lance_tx_timeout,
462
.ndo_validate_addr = eth_validate_addr,
463
.ndo_change_mtu = eth_change_mtu,
466
static unsigned long __init lance_probe1( struct net_device *dev,
467
struct lance_addr *init_rec )
469
volatile unsigned short *memaddr =
470
(volatile unsigned short *)init_rec->memaddr;
471
volatile unsigned short *ioaddr =
472
(volatile unsigned short *)init_rec->ioaddr;
473
struct lance_private *lp;
474
struct lance_ioreg *IO;
476
static int did_version;
477
unsigned short save1, save2;
479
PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
480
(long)memaddr, (long)ioaddr ));
482
/* Test whether memory readable and writable */
483
PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
484
if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;
486
/* Written values should come back... */
487
PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
490
if (*memaddr != 0x0001) goto probe_fail;
491
PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
493
if (*memaddr != 0x0000) goto probe_fail;
496
/* First port should be readable and writable */
497
PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
498
if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;
500
/* and written values should be readable */
501
PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
504
if (ioaddr[1] != 0x0001) goto probe_fail;
506
/* The CSR0_INIT bit should not be readable */
507
PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
510
ioaddr[0] = CSR0_INIT | CSR0_STOP;
511
if (ioaddr[0] != CSR0_STOP) {
516
PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
517
ioaddr[0] = CSR0_STOP;
518
if (ioaddr[0] != CSR0_STOP) {
525
PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
532
lp = netdev_priv(dev);
533
MEM = (struct lance_memory *)memaddr;
534
IO = lp->iobase = (struct lance_ioreg *)ioaddr;
535
dev->base_addr = (unsigned long)ioaddr; /* informational only */
536
lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;
538
REGA( CSR0 ) = CSR0_STOP;
540
/* Now test for type: If the eeprom I/O port is readable, it is a
542
if (addr_accessible( &(IO->eeprom), 0, 0 )) {
543
/* Switch back to Ram */
545
lp->cardtype = PAM_CARD;
547
else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
548
lp->cardtype = NEW_RIEBL;
551
lp->cardtype = OLD_RIEBL;
553
if (lp->cardtype == PAM_CARD ||
554
memaddr == (unsigned short *)0xffe00000) {
555
/* PAMs card and Riebl on ST use level 5 autovector */
556
if (request_irq(IRQ_AUTO_5, lance_interrupt, IRQ_TYPE_PRIO,
557
"PAM,Riebl-ST Ethernet", dev)) {
558
printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 );
561
dev->irq = (unsigned short)IRQ_AUTO_5;
564
/* For VME-RieblCards, request a free VME int;
565
* (This must be unsigned long, since dev->irq is short and the
566
* IRQ_MACHSPEC bit would be cut off...)
568
unsigned long irq = atari_register_vme_int();
570
printk( "Lance: request for VME interrupt failed\n" );
573
if (request_irq(irq, lance_interrupt, IRQ_TYPE_PRIO,
574
"Riebl-VME Ethernet", dev)) {
575
printk( "Lance: request for irq %ld failed\n", irq );
581
printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
582
dev->name, lance_names[lp->cardtype],
583
(unsigned long)ioaddr,
584
(unsigned long)memaddr,
586
init_rec->slow_flag ? " (slow memcpy)" : "" );
588
/* Get the ethernet address */
589
switch( lp->cardtype ) {
591
/* No ethernet address! (Set some default address) */
592
memcpy( dev->dev_addr, OldRieblDefHwaddr, 6 );
595
lp->memcpy_f( dev->dev_addr, RIEBL_HWADDR_ADDR, 6 );
599
for( i = 0; i < 6; ++i )
601
((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
602
((((unsigned short *)MEM)[i*2+1] & 0x0f));
606
printk("%pM\n", dev->dev_addr);
607
if (lp->cardtype == OLD_RIEBL) {
608
printk( "%s: Warning: This is a default ethernet address!\n",
610
printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
613
spin_lock_init(&lp->devlock);
615
MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
616
for( i = 0; i < 6; i++ )
617
MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
618
MEM->init.filter[0] = 0x00000000;
619
MEM->init.filter[1] = 0x00000000;
620
MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
621
MEM->init.rx_ring.adr_hi = 0;
622
MEM->init.rx_ring.len = RX_RING_LEN_BITS;
623
MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
624
MEM->init.tx_ring.adr_hi = 0;
625
MEM->init.tx_ring.len = TX_RING_LEN_BITS;
627
if (lp->cardtype == PAM_CARD)
628
IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
630
*RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
632
if (did_version++ == 0)
633
DPRINTK( 1, ( version ));
635
dev->netdev_ops = &lance_netdev_ops;
638
dev->watchdog_timeo = TX_TIMEOUT;
644
static int lance_open( struct net_device *dev )
646
struct lance_private *lp = netdev_priv(dev);
647
struct lance_ioreg *IO = lp->iobase;
650
DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
652
lance_init_ring(dev);
653
/* Re-initialize the LANCE, and start it when done. */
655
REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
658
REGA( CSR0 ) = CSR0_INIT;
659
/* From now on, AREG is kept to point to CSR0 */
663
if (DREG & CSR0_IDON)
665
if (i <= 0 || (DREG & CSR0_ERR)) {
666
DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
667
dev->name, i, DREG ));
675
netif_start_queue (dev);
677
DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
683
/* Initialize the LANCE Rx and Tx rings. */
685
static void lance_init_ring( struct net_device *dev )
687
struct lance_private *lp = netdev_priv(dev);
692
lp->cur_rx = lp->cur_tx = 0;
695
offset = offsetof( struct lance_memory, packet_area );
697
/* If the packet buffer at offset 'o' would conflict with the reserved area
698
* of RieblCards, advance it */
699
#define CHECK_OFFSET(o) \
701
if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
702
if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
703
: (o) < RIEBL_RSVD_END) \
704
(o) = RIEBL_RSVD_END; \
708
for( i = 0; i < TX_RING_SIZE; i++ ) {
709
CHECK_OFFSET(offset);
710
MEM->tx_head[i].base = offset;
711
MEM->tx_head[i].flag = TMD1_OWN_HOST;
712
MEM->tx_head[i].base_hi = 0;
713
MEM->tx_head[i].length = 0;
714
MEM->tx_head[i].misc = 0;
715
offset += PKT_BUF_SZ;
718
for( i = 0; i < RX_RING_SIZE; i++ ) {
719
CHECK_OFFSET(offset);
720
MEM->rx_head[i].base = offset;
721
MEM->rx_head[i].flag = TMD1_OWN_CHIP;
722
MEM->rx_head[i].base_hi = 0;
723
MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
724
MEM->rx_head[i].msg_length = 0;
725
offset += PKT_BUF_SZ;
730
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
733
static void lance_tx_timeout (struct net_device *dev)
735
struct lance_private *lp = netdev_priv(dev);
736
struct lance_ioreg *IO = lp->iobase;
739
DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
743
* Always set BSWP after a STOP as STOP puts it back into
744
* little endian mode.
746
REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
747
dev->stats.tx_errors++;
748
#ifndef final_version
750
DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
751
lp->dirty_tx, lp->cur_tx,
752
lp->tx_full ? " (full)" : "",
754
for( i = 0 ; i < RX_RING_SIZE; i++ )
755
DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
756
i, MEM->rx_head[i].base,
757
-MEM->rx_head[i].buf_length,
758
MEM->rx_head[i].msg_length ));
759
for( i = 0 ; i < TX_RING_SIZE; i++ )
760
DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
761
i, MEM->tx_head[i].base,
762
-MEM->tx_head[i].length,
763
MEM->tx_head[i].misc ));
766
/* XXX MSch: maybe purge/reinit ring here */
767
/* lance_restart, essentially */
768
lance_init_ring(dev);
769
REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
770
dev->trans_start = jiffies; /* prevent tx timeout */
771
netif_wake_queue(dev);
774
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
776
static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
778
struct lance_private *lp = netdev_priv(dev);
779
struct lance_ioreg *IO = lp->iobase;
781
struct lance_tx_head *head;
784
DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
788
/* The old LANCE chips doesn't automatically pad buffers to min. size. */
792
/* PAM-Card has a bug: Can only send packets with even number of bytes! */
793
else if (lp->cardtype == PAM_CARD && (len & 1))
796
if (len > skb->len) {
797
if (skb_padto(skb, len))
801
netif_stop_queue (dev);
803
/* Fill in a Tx ring entry */
804
if (lance_debug >= 3) {
805
printk( "%s: TX pkt type 0x%04x from %pM to %pM"
806
" data at 0x%08x len %d\n",
807
dev->name, ((u_short *)skb->data)[6],
808
&skb->data[6], skb->data,
809
(int)skb->data, (int)skb->len );
812
/* We're not prepared for the int until the last flags are set/reset. And
813
* the int may happen already after setting the OWN_CHIP... */
814
spin_lock_irqsave (&lp->devlock, flags);
816
/* Mask to ring buffer boundary. */
817
entry = lp->cur_tx & TX_RING_MOD_MASK;
818
head = &(MEM->tx_head[entry]);
820
/* Caution: the write order is important here, set the "ownership" bits
827
lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
828
head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
829
dev->stats.tx_bytes += skb->len;
830
dev_kfree_skb( skb );
832
while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
833
lp->cur_tx -= TX_RING_SIZE;
834
lp->dirty_tx -= TX_RING_SIZE;
837
/* Trigger an immediate send poll. */
838
DREG = CSR0_INEA | CSR0_TDMD;
840
if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
842
netif_start_queue (dev);
845
spin_unlock_irqrestore (&lp->devlock, flags);
850
/* The LANCE interrupt handler. */
852
static irqreturn_t lance_interrupt( int irq, void *dev_id )
854
struct net_device *dev = dev_id;
855
struct lance_private *lp;
856
struct lance_ioreg *IO;
857
int csr0, boguscnt = 10;
861
DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
865
lp = netdev_priv(dev);
867
spin_lock (&lp->devlock);
871
while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
874
/* Acknowledge all of the current interrupt sources ASAP. */
875
DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
876
CSR0_TDMD | CSR0_INEA);
878
DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
879
dev->name, csr0, DREG ));
881
if (csr0 & CSR0_RINT) /* Rx interrupt */
884
if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
885
int dirty_tx = lp->dirty_tx;
887
while( dirty_tx < lp->cur_tx) {
888
int entry = dirty_tx & TX_RING_MOD_MASK;
889
int status = MEM->tx_head[entry].flag;
891
if (status & TMD1_OWN_CHIP)
892
break; /* It still hasn't been Txed */
894
MEM->tx_head[entry].flag = 0;
896
if (status & TMD1_ERR) {
897
/* There was an major error, log it. */
898
int err_status = MEM->tx_head[entry].misc;
899
dev->stats.tx_errors++;
900
if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
901
if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
902
if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++;
903
if (err_status & TMD3_UFLO) {
904
/* Ackk! On FIFO errors the Tx unit is turned off! */
905
dev->stats.tx_fifo_errors++;
906
/* Remove this verbosity later! */
907
DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
909
/* Restart the chip. */
913
if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
914
dev->stats.collisions++;
915
dev->stats.tx_packets++;
918
/* XXX MSch: free skb?? */
922
#ifndef final_version
923
if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
924
DPRINTK( 0, ( "out-of-sync dirty pointer,"
925
" %d vs. %d, full=%ld.\n",
926
dirty_tx, lp->cur_tx, lp->tx_full ));
927
dirty_tx += TX_RING_SIZE;
931
if (lp->tx_full && (netif_queue_stopped(dev)) &&
932
dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
933
/* The ring is no longer full, clear tbusy. */
935
netif_wake_queue (dev);
938
lp->dirty_tx = dirty_tx;
941
/* Log misc errors. */
942
if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
943
if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
944
if (csr0 & CSR0_MERR) {
945
DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
946
"status %04x.\n", dev->name, csr0 ));
947
/* Restart the chip. */
952
/* Clear any other interrupt, and set interrupt enable. */
953
DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
954
CSR0_IDON | CSR0_INEA;
956
DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
959
spin_unlock (&lp->devlock);
960
return IRQ_RETVAL(handled);
964
static int lance_rx( struct net_device *dev )
966
struct lance_private *lp = netdev_priv(dev);
967
int entry = lp->cur_rx & RX_RING_MOD_MASK;
970
DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
971
MEM->rx_head[entry].flag ));
973
/* If we own the next entry, it's a new packet. Send it up. */
974
while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
975
struct lance_rx_head *head = &(MEM->rx_head[entry]);
976
int status = head->flag;
978
if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
979
/* There is a tricky error noted by John Murphy,
980
<murf@perftech.com> to Russ Nelson: Even with full-sized
981
buffers it's possible for a jabber packet to use two
982
buffers, with only the last correctly noting the error. */
983
if (status & RMD1_ENP) /* Only count a general error at the */
984
dev->stats.rx_errors++; /* end of a packet.*/
985
if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
986
if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
987
if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
988
if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
989
head->flag &= (RMD1_ENP|RMD1_STP);
991
/* Malloc up new buffer, compatible with net-3. */
992
short pkt_len = head->msg_length & 0xfff;
996
printk( "%s: Runt packet!\n", dev->name );
997
dev->stats.rx_errors++;
1000
skb = dev_alloc_skb( pkt_len+2 );
1002
DPRINTK( 1, ( "%s: Memory squeeze, deferring packet.\n",
1004
for( i = 0; i < RX_RING_SIZE; i++ )
1005
if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
1009
if (i > RX_RING_SIZE - 2) {
1010
dev->stats.rx_dropped++;
1011
head->flag |= RMD1_OWN_CHIP;
1017
if (lance_debug >= 3) {
1018
u_char *data = PKTBUF_ADDR(head);
1020
printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %pM to %pM "
1021
"data %02x %02x %02x %02x %02x %02x %02x %02x "
1023
dev->name, ((u_short *)data)[6],
1025
data[15], data[16], data[17], data[18],
1026
data[19], data[20], data[21], data[22],
1030
skb_reserve( skb, 2 ); /* 16 byte align */
1031
skb_put( skb, pkt_len ); /* Make room */
1032
lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
1033
skb->protocol = eth_type_trans( skb, dev );
1035
dev->stats.rx_packets++;
1036
dev->stats.rx_bytes += pkt_len;
1040
head->flag |= RMD1_OWN_CHIP;
1041
entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1043
lp->cur_rx &= RX_RING_MOD_MASK;
1045
/* From lance.c (Donald Becker): */
1046
/* We should check that at least two ring entries are free. If not,
1047
we should free one and mark stats->rx_dropped++. */
1053
static int lance_close( struct net_device *dev )
1055
struct lance_private *lp = netdev_priv(dev);
1056
struct lance_ioreg *IO = lp->iobase;
1058
netif_stop_queue (dev);
1062
DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
1065
/* We stop the LANCE here -- it occasionally polls
1066
memory if we don't. */
1073
/* Set or clear the multicast filter for this adaptor.
1074
num_addrs == -1 Promiscuous mode, receive all packets
1075
num_addrs == 0 Normal mode, clear multicast list
1076
num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1077
best-effort filtering.
1080
static void set_multicast_list( struct net_device *dev )
1082
struct lance_private *lp = netdev_priv(dev);
1083
struct lance_ioreg *IO = lp->iobase;
1085
if (netif_running(dev))
1086
/* Only possible if board is already started */
1089
/* We take the simple way out and always enable promiscuous mode. */
1090
DREG = CSR0_STOP; /* Temporarily stop the lance. */
1092
if (dev->flags & IFF_PROMISC) {
1093
/* Log any net taps. */
1094
DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name ));
1095
REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
1097
short multicast_table[4];
1098
int num_addrs = netdev_mc_count(dev);
1100
/* We don't use the multicast table, but rely on upper-layer
1102
memset( multicast_table, (num_addrs == 0) ? 0 : -1,
1103
sizeof(multicast_table) );
1104
for( i = 0; i < 4; i++ )
1105
REGA( CSR8+i ) = multicast_table[i];
1106
REGA( CSR15 ) = 0; /* Unset promiscuous mode */
1110
* Always set BSWP after a STOP as STOP puts it back into
1111
* little endian mode.
1113
REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
1115
/* Resume normal operation and reset AREG to CSR0 */
1116
REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
1120
/* This is needed for old RieblCards and possible for new RieblCards */
1122
static int lance_set_mac_address( struct net_device *dev, void *addr )
1124
struct lance_private *lp = netdev_priv(dev);
1125
struct sockaddr *saddr = addr;
1128
if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
1131
if (netif_running(dev)) {
1132
/* Only possible while card isn't started */
1133
DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
1138
memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );
1139
for( i = 0; i < 6; i++ )
1140
MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
1141
lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
1142
/* set also the magic for future sessions */
1143
*RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
1150
static struct net_device *atarilance_dev;
1152
static int __init atarilance_module_init(void)
1154
atarilance_dev = atarilance_probe(-1);
1155
if (IS_ERR(atarilance_dev))
1156
return PTR_ERR(atarilance_dev);
1160
static void __exit atarilance_module_exit(void)
1162
unregister_netdev(atarilance_dev);
1163
free_irq(atarilance_dev->irq, atarilance_dev);
1164
free_netdev(atarilance_dev);
1166
module_init(atarilance_module_init);
1167
module_exit(atarilance_module_exit);