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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / net / atarilance.c
blob6c18cf05a0617f9f2ead138dab4b84391849195a
1 /* atarilance.c: Ethernet driver for VME Lance cards on the Atari */
2 /*
3 Written 1995/96 by Roman Hodek (Roman.Hodek@informatik.uni-erlangen.de)
4
5 This software may be used and distributed according to the terms
6 of the GNU General Public License, incorporated herein by reference.
7
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
14
15 v1.0: (in 1.2.13pl4/0.9.13)
16 Initial version
17 v1.1: (in 1.2.13pl5)
18 more comments
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
29 v1.2: (in 1.2.13pl8)
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
32 be restored!
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).
42
43 */
44
45 static char version[] = "atarilance.c: v1.3 04/04/96 "
46 "Roman.Hodek@informatik.uni-erlangen.de\n";
47
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/slab.h>
57 #include <linux/interrupt.h>
58 #include <linux/init.h>
59 #include <linux/bitops.h>
60
61 #include <asm/setup.h>
62 #include <asm/irq.h>
63 #include <asm/atarihw.h>
64 #include <asm/atariints.h>
65 #include <asm/io.h>
66
67 /* Debug level:
68 * 0 = silent, print only serious errors
69 * 1 = normal, print error messages
70 * 2 = debug, print debug infos
71 * 3 = debug, print even more debug infos (packet data)
72 */
73
74 #define LANCE_DEBUG 1
75
76 #ifdef LANCE_DEBUG
77 static int lance_debug = LANCE_DEBUG;
78 #else
79 static int lance_debug = 1;
80 #endif
81 module_param(lance_debug, int, 0);
82 MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)");
83 MODULE_LICENSE("GPL");
84
85 /* Print debug messages on probing? */
86 #undef LANCE_DEBUG_PROBE
87
88 #define DPRINTK(n,a) \
89 do { \
90 if (lance_debug >= n) \
91 printk a; \
92 } while( 0 )
93
94 #ifdef LANCE_DEBUG_PROBE
95 # define PROBE_PRINT(a) printk a
96 #else
97 # define PROBE_PRINT(a)
98 #endif
99
100 /* These define the number of Rx and Tx buffers as log2. (Only powers
101 * of two are valid)
102 * Much more rx buffers (32) are reserved than tx buffers (8), since receiving
103 * is more time critical then sending and packets may have to remain in the
104 * board's memory when main memory is low.
105 */
106
107 #define TX_LOG_RING_SIZE 3
108 #define RX_LOG_RING_SIZE 5
109
110 /* These are the derived values */
111
112 #define TX_RING_SIZE (1 << TX_LOG_RING_SIZE)
113 #define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5)
114 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
115
116 #define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
117 #define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
118 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
119
120 #define TX_TIMEOUT 20
121
122 /* The LANCE Rx and Tx ring descriptors. */
123 struct lance_rx_head {
124 unsigned short base; /* Low word of base addr */
125 volatile unsigned char flag;
126 unsigned char base_hi; /* High word of base addr (unused) */
127 short buf_length; /* This length is 2s complement! */
128 volatile short msg_length; /* This length is "normal". */
129 };
130
131 struct lance_tx_head {
132 unsigned short base; /* Low word of base addr */
133 volatile unsigned char flag;
134 unsigned char base_hi; /* High word of base addr (unused) */
135 short length; /* Length is 2s complement! */
136 volatile short misc;
137 };
138
139 struct ringdesc {
140 unsigned short adr_lo; /* Low 16 bits of address */
141 unsigned char len; /* Length bits */
142 unsigned char adr_hi; /* High 8 bits of address (unused) */
143 };
144
145 /* The LANCE initialization block, described in databook. */
146 struct lance_init_block {
147 unsigned short mode; /* Pre-set mode */
148 unsigned char hwaddr[6]; /* Physical ethernet address */
149 unsigned filter[2]; /* Multicast filter (unused). */
150 /* Receive and transmit ring base, along with length bits. */
151 struct ringdesc rx_ring;
152 struct ringdesc tx_ring;
153 };
154
155 /* The whole layout of the Lance shared memory */
156 struct lance_memory {
157 struct lance_init_block init;
158 struct lance_tx_head tx_head[TX_RING_SIZE];
159 struct lance_rx_head rx_head[RX_RING_SIZE];
160 char packet_area[0]; /* packet data follow after the
161 * init block and the ring
162 * descriptors and are located
163 * at runtime */
164 };
165
166 /* RieblCard specifics:
167 * The original TOS driver for these cards reserves the area from offset
168 * 0xee70 to 0xeebb for storing configuration data. Of interest to us is the
169 * Ethernet address there, and the magic for verifying the data's validity.
170 * The reserved area isn't touch by packet buffers. Furthermore, offset 0xfffe
171 * is reserved for the interrupt vector number.
172 */
173 #define RIEBL_RSVD_START 0xee70
174 #define RIEBL_RSVD_END 0xeec0
175 #define RIEBL_MAGIC 0x09051990
176 #define RIEBL_MAGIC_ADDR ((unsigned long *)(((char *)MEM) + 0xee8a))
177 #define RIEBL_HWADDR_ADDR ((unsigned char *)(((char *)MEM) + 0xee8e))
178 #define RIEBL_IVEC_ADDR ((unsigned short *)(((char *)MEM) + 0xfffe))
179
180 /* This is a default address for the old RieblCards without a battery
181 * that have no ethernet address at boot time. 00:00:36:04 is the
182 * prefix for Riebl cards, the 00:00 at the end is arbitrary.
183 */
184
185 static unsigned char OldRieblDefHwaddr[6] = {
186 0x00, 0x00, 0x36, 0x04, 0x00, 0x00
187 };
188
189
190 /* I/O registers of the Lance chip */
191
192 struct lance_ioreg {
193 /* base+0x0 */ volatile unsigned short data;
194 /* base+0x2 */ volatile unsigned short addr;
195 unsigned char _dummy1[3];
196 /* base+0x7 */ volatile unsigned char ivec;
197 unsigned char _dummy2[5];
198 /* base+0xd */ volatile unsigned char eeprom;
199 unsigned char _dummy3;
200 /* base+0xf */ volatile unsigned char mem;
201 };
202
203 /* Types of boards this driver supports */
204
205 enum lance_type {
206 OLD_RIEBL, /* old Riebl card without battery */
207 NEW_RIEBL, /* new Riebl card with battery */
208 PAM_CARD /* PAM card with EEPROM */
209 };
210
211 static char *lance_names[] = {
212 "Riebl-Card (without battery)",
213 "Riebl-Card (with battery)",
214 "PAM intern card"
215 };
216
217 /* The driver's private device structure */
218
219 struct lance_private {
220 enum lance_type cardtype;
221 struct lance_ioreg *iobase;
222 struct lance_memory *mem;
223 int cur_rx, cur_tx; /* The next free ring entry */
224 int dirty_tx; /* Ring entries to be freed. */
225 /* copy function */
226 void *(*memcpy_f)( void *, const void *, size_t );
227 /* This must be long for set_bit() */
228 long tx_full;
229 spinlock_t devlock;
230 };
231
232 /* I/O register access macros */
233
234 #define MEM lp->mem
235 #define DREG IO->data
236 #define AREG IO->addr
237 #define REGA(a) (*( AREG = (a), &DREG ))
238
239 /* Definitions for packet buffer access: */
240 #define PKT_BUF_SZ 1544
241 /* Get the address of a packet buffer corresponding to a given buffer head */
242 #define PKTBUF_ADDR(head) (((unsigned char *)(MEM)) + (head)->base)
243
244 /* Possible memory/IO addresses for probing */
245
246 struct lance_addr {
247 unsigned long memaddr;
248 unsigned long ioaddr;
249 int slow_flag;
250 } lance_addr_list[] = {
251 { 0xfe010000, 0xfe00fff0, 0 }, /* RieblCard VME in TT */
252 { 0xffc10000, 0xffc0fff0, 0 }, /* RieblCard VME in MegaSTE
253 (highest byte stripped) */
254 { 0xffe00000, 0xffff7000, 1 }, /* RieblCard in ST
255 (highest byte stripped) */
256 { 0xffd00000, 0xffff7000, 1 }, /* RieblCard in ST with hw modif. to
257 avoid conflict with ROM
258 (highest byte stripped) */
259 { 0xffcf0000, 0xffcffff0, 0 }, /* PAMCard VME in TT and MSTE
260 (highest byte stripped) */
261 { 0xfecf0000, 0xfecffff0, 0 }, /* Rhotron's PAMCard VME in TT and MSTE
262 (highest byte stripped) */
263 };
264
265 #define N_LANCE_ADDR ARRAY_SIZE(lance_addr_list)
266
267
268 /* Definitions for the Lance */
269
270 /* tx_head flags */
271 #define TMD1_ENP 0x01 /* end of packet */
272 #define TMD1_STP 0x02 /* start of packet */
273 #define TMD1_DEF 0x04 /* deferred */
274 #define TMD1_ONE 0x08 /* one retry needed */
275 #define TMD1_MORE 0x10 /* more than one retry needed */
276 #define TMD1_ERR 0x40 /* error summary */
277 #define TMD1_OWN 0x80 /* ownership (set: chip owns) */
278
279 #define TMD1_OWN_CHIP TMD1_OWN
280 #define TMD1_OWN_HOST 0
281
282 /* tx_head misc field */
283 #define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */
284 #define TMD3_RTRY 0x0400 /* failed after 16 retries */
285 #define TMD3_LCAR 0x0800 /* carrier lost */
286 #define TMD3_LCOL 0x1000 /* late collision */
287 #define TMD3_UFLO 0x4000 /* underflow (late memory) */
288 #define TMD3_BUFF 0x8000 /* buffering error (no ENP) */
289
290 /* rx_head flags */
291 #define RMD1_ENP 0x01 /* end of packet */
292 #define RMD1_STP 0x02 /* start of packet */
293 #define RMD1_BUFF 0x04 /* buffer error */
294 #define RMD1_CRC 0x08 /* CRC error */
295 #define RMD1_OFLO 0x10 /* overflow */
296 #define RMD1_FRAM 0x20 /* framing error */
297 #define RMD1_ERR 0x40 /* error summary */
298 #define RMD1_OWN 0x80 /* ownership (set: ship owns) */
299
300 #define RMD1_OWN_CHIP RMD1_OWN
301 #define RMD1_OWN_HOST 0
302
303 /* register names */
304 #define CSR0 0 /* mode/status */
305 #define CSR1 1 /* init block addr (low) */
306 #define CSR2 2 /* init block addr (high) */
307 #define CSR3 3 /* misc */
308 #define CSR8 8 /* address filter */
309 #define CSR15 15 /* promiscuous mode */
310
311 /* CSR0 */
312 /* (R=readable, W=writeable, S=set on write, C=clear on write) */
313 #define CSR0_INIT 0x0001 /* initialize (RS) */
314 #define CSR0_STRT 0x0002 /* start (RS) */
315 #define CSR0_STOP 0x0004 /* stop (RS) */
316 #define CSR0_TDMD 0x0008 /* transmit demand (RS) */
317 #define CSR0_TXON 0x0010 /* transmitter on (R) */
318 #define CSR0_RXON 0x0020 /* receiver on (R) */
319 #define CSR0_INEA 0x0040 /* interrupt enable (RW) */
320 #define CSR0_INTR 0x0080 /* interrupt active (R) */
321 #define CSR0_IDON 0x0100 /* initialization done (RC) */
322 #define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */
323 #define CSR0_RINT 0x0400 /* receiver interrupt (RC) */
324 #define CSR0_MERR 0x0800 /* memory error (RC) */
325 #define CSR0_MISS 0x1000 /* missed frame (RC) */
326 #define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */
327 #define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */
328 #define CSR0_ERR 0x8000 /* error (RC) */
329
330 /* CSR3 */
331 #define CSR3_BCON 0x0001 /* byte control */
332 #define CSR3_ACON 0x0002 /* ALE control */
333 #define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
334
335
336
337 /***************************** Prototypes *****************************/
338
339 <<<<<<< HEAD:drivers/net/atarilance.c
340 static int addr_accessible( volatile void *regp, int wordflag, int
341 writeflag );
342 =======
343 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/net/atarilance.c
344 static unsigned long lance_probe1( struct net_device *dev, struct lance_addr
345 *init_rec );
346 static int lance_open( struct net_device *dev );
347 static void lance_init_ring( struct net_device *dev );
348 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev );
349 static irqreturn_t lance_interrupt( int irq, void *dev_id );
350 static int lance_rx( struct net_device *dev );
351 static int lance_close( struct net_device *dev );
352 static void set_multicast_list( struct net_device *dev );
353 static int lance_set_mac_address( struct net_device *dev, void *addr );
354 static void lance_tx_timeout (struct net_device *dev);
355
356 /************************* End of Prototypes **************************/
357
358
359
360
361
362 static void *slow_memcpy( void *dst, const void *src, size_t len )
363
364 { char *cto = dst;
365 const char *cfrom = src;
366
367 while( len-- ) {
368 *cto++ = *cfrom++;
369 MFPDELAY();
370 }
371 return( dst );
372 }
373
374
375 struct net_device * __init atarilance_probe(int unit)
376 {
377 int i;
378 static int found;
379 struct net_device *dev;
380 int err = -ENODEV;
381
382 if (!MACH_IS_ATARI || found)
383 /* Assume there's only one board possible... That seems true, since
384 * the Riebl/PAM board's address cannot be changed. */
385 return ERR_PTR(-ENODEV);
386
387 dev = alloc_etherdev(sizeof(struct lance_private));
388 if (!dev)
389 return ERR_PTR(-ENOMEM);
390 if (unit >= 0) {
391 sprintf(dev->name, "eth%d", unit);
392 netdev_boot_setup_check(dev);
393 }
394
395 for( i = 0; i < N_LANCE_ADDR; ++i ) {
396 if (lance_probe1( dev, &lance_addr_list[i] )) {
397 found = 1;
398 err = register_netdev(dev);
399 if (!err)
400 return dev;
401 free_irq(dev->irq, dev);
402 break;
403 }
404 }
405 free_netdev(dev);
406 return ERR_PTR(err);
407 }
408
409
410 /* Derived from hwreg_present() in atari/config.c: */
411
412 <<<<<<< HEAD:drivers/net/atarilance.c
413 static int __init addr_accessible( volatile void *regp, int wordflag, int writeflag )
414 =======
415 static noinline int __init addr_accessible(volatile void *regp, int wordflag,
416 int writeflag)
417 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/net/atarilance.c
418 {
419 int ret;
420 long flags;
421 long *vbr, save_berr;
422
423 local_irq_save(flags);
424
425 __asm__ __volatile__ ( "movec %/vbr,%0" : "=r" (vbr) : );
426 save_berr = vbr[2];
427
428 __asm__ __volatile__
429 ( "movel %/sp,%/d1\n\t"
430 "movel #Lberr,%2@\n\t"
431 "moveq #0,%0\n\t"
432 "tstl %3\n\t"
433 "bne 1f\n\t"
434 "moveb %1@,%/d0\n\t"
435 "nop \n\t"
436 "bra 2f\n"
437 "1: movew %1@,%/d0\n\t"
438 "nop \n"
439 "2: tstl %4\n\t"
440 "beq 2f\n\t"
441 "tstl %3\n\t"
442 "bne 1f\n\t"
443 "clrb %1@\n\t"
444 "nop \n\t"
445 "moveb %/d0,%1@\n\t"
446 "nop \n\t"
447 "bra 2f\n"
448 "1: clrw %1@\n\t"
449 "nop \n\t"
450 "movew %/d0,%1@\n\t"
451 "nop \n"
452 "2: moveq #1,%0\n"
453 "Lberr: movel %/d1,%/sp"
454 : "=&d" (ret)
455 : "a" (regp), "a" (&vbr[2]), "rm" (wordflag), "rm" (writeflag)
456 : "d0", "d1", "memory"
457 );
458
459 vbr[2] = save_berr;
460 local_irq_restore(flags);
461
462 return( ret );
463 }
464
465
466 static unsigned long __init lance_probe1( struct net_device *dev,
467 struct lance_addr *init_rec )
468 {
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;
475 int i;
476 static int did_version;
477 unsigned short save1, save2;
478 DECLARE_MAC_BUF(mac);
479
480 PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
481 (long)memaddr, (long)ioaddr ));
482
483 /* Test whether memory readable and writable */
484 PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
485 if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;
486
487 /* Written values should come back... */
488 PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
489 save1 = *memaddr;
490 *memaddr = 0x0001;
491 if (*memaddr != 0x0001) goto probe_fail;
492 PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
493 *memaddr = 0x0000;
494 if (*memaddr != 0x0000) goto probe_fail;
495 *memaddr = save1;
496
497 /* First port should be readable and writable */
498 PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
499 if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;
500
501 /* and written values should be readable */
502 PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
503 save2 = ioaddr[1];
504 ioaddr[1] = 0x0001;
505 if (ioaddr[1] != 0x0001) goto probe_fail;
506
507 /* The CSR0_INIT bit should not be readable */
508 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
509 save1 = ioaddr[0];
510 ioaddr[1] = CSR0;
511 ioaddr[0] = CSR0_INIT | CSR0_STOP;
512 if (ioaddr[0] != CSR0_STOP) {
513 ioaddr[0] = save1;
514 ioaddr[1] = save2;
515 goto probe_fail;
516 }
517 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
518 ioaddr[0] = CSR0_STOP;
519 if (ioaddr[0] != CSR0_STOP) {
520 ioaddr[0] = save1;
521 ioaddr[1] = save2;
522 goto probe_fail;
523 }
524
525 /* Now ok... */
526 PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
527 goto probe_ok;
528
529 probe_fail:
530 return( 0 );
531
532 probe_ok:
533 lp = (struct lance_private *)dev->priv;
534 MEM = (struct lance_memory *)memaddr;
535 IO = lp->iobase = (struct lance_ioreg *)ioaddr;
536 dev->base_addr = (unsigned long)ioaddr; /* informational only */
537 lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;
538
539 REGA( CSR0 ) = CSR0_STOP;
540
541 /* Now test for type: If the eeprom I/O port is readable, it is a
542 * PAM card */
543 if (addr_accessible( &(IO->eeprom), 0, 0 )) {
544 /* Switch back to Ram */
545 i = IO->mem;
546 lp->cardtype = PAM_CARD;
547 }
548 else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
549 lp->cardtype = NEW_RIEBL;
550 }
551 else
552 lp->cardtype = OLD_RIEBL;
553
554 if (lp->cardtype == PAM_CARD ||
555 memaddr == (unsigned short *)0xffe00000) {
556 /* PAMs card and Riebl on ST use level 5 autovector */
557 if (request_irq(IRQ_AUTO_5, lance_interrupt, IRQ_TYPE_PRIO,
558 "PAM/Riebl-ST Ethernet", dev)) {
559 printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 );
560 return( 0 );
561 }
562 dev->irq = (unsigned short)IRQ_AUTO_5;
563 }
564 else {
565 /* For VME-RieblCards, request a free VME int;
566 * (This must be unsigned long, since dev->irq is short and the
567 * IRQ_MACHSPEC bit would be cut off...)
568 */
569 unsigned long irq = atari_register_vme_int();
570 if (!irq) {
571 printk( "Lance: request for VME interrupt failed\n" );
572 return( 0 );
573 }
574 if (request_irq(irq, lance_interrupt, IRQ_TYPE_PRIO,
575 "Riebl-VME Ethernet", dev)) {
576 printk( "Lance: request for irq %ld failed\n", irq );
577 return( 0 );
578 }
579 dev->irq = irq;
580 }
581
582 printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
583 dev->name, lance_names[lp->cardtype],
584 (unsigned long)ioaddr,
585 (unsigned long)memaddr,
586 dev->irq,
587 init_rec->slow_flag ? " (slow memcpy)" : "" );
588
589 /* Get the ethernet address */
590 switch( lp->cardtype ) {
591 case OLD_RIEBL:
592 /* No ethernet address! (Set some default address) */
593 memcpy( dev->dev_addr, OldRieblDefHwaddr, 6 );
594 break;
595 case NEW_RIEBL:
596 lp->memcpy_f( dev->dev_addr, RIEBL_HWADDR_ADDR, 6 );
597 break;
598 case PAM_CARD:
599 i = IO->eeprom;
600 for( i = 0; i < 6; ++i )
601 dev->dev_addr[i] =
602 ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
603 ((((unsigned short *)MEM)[i*2+1] & 0x0f));
604 i = IO->mem;
605 break;
606 }
607 printk("%s\n", print_mac(mac, dev->dev_addr));
608 if (lp->cardtype == OLD_RIEBL) {
609 printk( "%s: Warning: This is a default ethernet address!\n",
610 dev->name );
611 printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
612 }
613
614 spin_lock_init(&lp->devlock);
615
616 MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
617 for( i = 0; i < 6; i++ )
618 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
619 MEM->init.filter[0] = 0x00000000;
620 MEM->init.filter[1] = 0x00000000;
621 MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
622 MEM->init.rx_ring.adr_hi = 0;
623 MEM->init.rx_ring.len = RX_RING_LEN_BITS;
624 MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
625 MEM->init.tx_ring.adr_hi = 0;
626 MEM->init.tx_ring.len = TX_RING_LEN_BITS;
627
628 if (lp->cardtype == PAM_CARD)
629 IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
630 else
631 *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
632
633 if (did_version++ == 0)
634 DPRINTK( 1, ( version ));
635
636 /* The LANCE-specific entries in the device structure. */
637 dev->open = &lance_open;
638 dev->hard_start_xmit = &lance_start_xmit;
639 dev->stop = &lance_close;
640 dev->set_multicast_list = &set_multicast_list;
641 dev->set_mac_address = &lance_set_mac_address;
642
643 /* XXX MSch */
644 dev->tx_timeout = lance_tx_timeout;
645 dev->watchdog_timeo = TX_TIMEOUT;
646
647 return( 1 );
648 }
649
650
651 static int lance_open( struct net_device *dev )
652
653 { struct lance_private *lp = (struct lance_private *)dev->priv;
654 struct lance_ioreg *IO = lp->iobase;
655 int i;
656
657 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
658
659 lance_init_ring(dev);
660 /* Re-initialize the LANCE, and start it when done. */
661
662 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
663 REGA( CSR2 ) = 0;
664 REGA( CSR1 ) = 0;
665 REGA( CSR0 ) = CSR0_INIT;
666 /* From now on, AREG is kept to point to CSR0 */
667
668 i = 1000000;
669 while (--i > 0)
670 if (DREG & CSR0_IDON)
671 break;
672 if (i < 0 || (DREG & CSR0_ERR)) {
673 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
674 dev->name, i, DREG ));
675 DREG = CSR0_STOP;
676 return( -EIO );
677 }
678 DREG = CSR0_IDON;
679 DREG = CSR0_STRT;
680 DREG = CSR0_INEA;
681
682 netif_start_queue (dev);
683
684 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
685
686 return( 0 );
687 }
688
689
690 /* Initialize the LANCE Rx and Tx rings. */
691
692 static void lance_init_ring( struct net_device *dev )
693
694 { struct lance_private *lp = (struct lance_private *)dev->priv;
695 int i;
696 unsigned offset;
697
698 lp->tx_full = 0;
699 lp->cur_rx = lp->cur_tx = 0;
700 lp->dirty_tx = 0;
701
702 offset = offsetof( struct lance_memory, packet_area );
703
704 /* If the packet buffer at offset 'o' would conflict with the reserved area
705 * of RieblCards, advance it */
706 #define CHECK_OFFSET(o) \
707 do { \
708 if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
709 if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
710 : (o) < RIEBL_RSVD_END) \
711 (o) = RIEBL_RSVD_END; \
712 } \
713 } while(0)
714
715 for( i = 0; i < TX_RING_SIZE; i++ ) {
716 CHECK_OFFSET(offset);
717 MEM->tx_head[i].base = offset;
718 MEM->tx_head[i].flag = TMD1_OWN_HOST;
719 MEM->tx_head[i].base_hi = 0;
720 MEM->tx_head[i].length = 0;
721 MEM->tx_head[i].misc = 0;
722 offset += PKT_BUF_SZ;
723 }
724
725 for( i = 0; i < RX_RING_SIZE; i++ ) {
726 CHECK_OFFSET(offset);
727 MEM->rx_head[i].base = offset;
728 MEM->rx_head[i].flag = TMD1_OWN_CHIP;
729 MEM->rx_head[i].base_hi = 0;
730 MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
731 MEM->rx_head[i].msg_length = 0;
732 offset += PKT_BUF_SZ;
733 }
734 }
735
736
737 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
738
739
740 static void lance_tx_timeout (struct net_device *dev)
741 {
742 struct lance_private *lp = (struct lance_private *) dev->priv;
743 struct lance_ioreg *IO = lp->iobase;
744
745 AREG = CSR0;
746 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
747 dev->name, DREG ));
748 DREG = CSR0_STOP;
749 /*
750 * Always set BSWP after a STOP as STOP puts it back into
751 * little endian mode.
752 */
753 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
754 dev->stats.tx_errors++;
755 #ifndef final_version
756 { int i;
757 DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
758 lp->dirty_tx, lp->cur_tx,
759 lp->tx_full ? " (full)" : "",
760 lp->cur_rx ));
761 for( i = 0 ; i < RX_RING_SIZE; i++ )
762 DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
763 i, MEM->rx_head[i].base,
764 -MEM->rx_head[i].buf_length,
765 MEM->rx_head[i].msg_length ));
766 for( i = 0 ; i < TX_RING_SIZE; i++ )
767 DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
768 i, MEM->tx_head[i].base,
769 -MEM->tx_head[i].length,
770 MEM->tx_head[i].misc ));
771 }
772 #endif
773 /* XXX MSch: maybe purge/reinit ring here */
774 /* lance_restart, essentially */
775 lance_init_ring(dev);
776 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
777 dev->trans_start = jiffies;
778 netif_wake_queue (dev);
779 }
780
781 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
782
783 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
784
785 { struct lance_private *lp = (struct lance_private *)dev->priv;
786 struct lance_ioreg *IO = lp->iobase;
787 int entry, len;
788 struct lance_tx_head *head;
789 unsigned long flags;
790 DECLARE_MAC_BUF(mac);
791 DECLARE_MAC_BUF(mac2);
792
793 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
794 dev->name, DREG ));
795
796
797 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
798 len = skb->len;
799 if (len < ETH_ZLEN)
800 len = ETH_ZLEN;
801 /* PAM-Card has a bug: Can only send packets with even number of bytes! */
802 else if (lp->cardtype == PAM_CARD && (len & 1))
803 ++len;
804
805 if (len > skb->len) {
806 if (skb_padto(skb, len))
807 return 0;
808 }
809
810 netif_stop_queue (dev);
811
812 /* Fill in a Tx ring entry */
813 if (lance_debug >= 3) {
814 printk( "%s: TX pkt type 0x%04x from "
815 "%s to %s"
816 " data at 0x%08x len %d\n",
817 dev->name, ((u_short *)skb->data)[6],
818 print_mac(mac, &skb->data[6]),
819 print_mac(mac2, skb->data),
820 (int)skb->data, (int)skb->len );
821 }
822
823 /* We're not prepared for the int until the last flags are set/reset. And
824 * the int may happen already after setting the OWN_CHIP... */
825 spin_lock_irqsave (&lp->devlock, flags);
826
827 /* Mask to ring buffer boundary. */
828 entry = lp->cur_tx & TX_RING_MOD_MASK;
829 head = &(MEM->tx_head[entry]);
830
831 /* Caution: the write order is important here, set the "ownership" bits
832 * last.
833 */
834
835
836 head->length = -len;
837 head->misc = 0;
838 lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
839 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
840 dev->stats.tx_bytes += skb->len;
841 dev_kfree_skb( skb );
842 lp->cur_tx++;
843 while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
844 lp->cur_tx -= TX_RING_SIZE;
845 lp->dirty_tx -= TX_RING_SIZE;
846 }
847
848 /* Trigger an immediate send poll. */
849 DREG = CSR0_INEA | CSR0_TDMD;
850 dev->trans_start = jiffies;
851
852 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
853 TMD1_OWN_HOST)
854 netif_start_queue (dev);
855 else
856 lp->tx_full = 1;
857 spin_unlock_irqrestore (&lp->devlock, flags);
858
859 return 0;
860 }
861
862 /* The LANCE interrupt handler. */
863
864 static irqreturn_t lance_interrupt( int irq, void *dev_id )
865 {
866 struct net_device *dev = dev_id;
867 struct lance_private *lp;
868 struct lance_ioreg *IO;
869 int csr0, boguscnt = 10;
870 int handled = 0;
871
872 if (dev == NULL) {
873 DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
874 return IRQ_NONE;
875 }
876
877 lp = (struct lance_private *)dev->priv;
878 IO = lp->iobase;
879 spin_lock (&lp->devlock);
880
881 AREG = CSR0;
882
883 while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
884 --boguscnt >= 0) {
885 handled = 1;
886 /* Acknowledge all of the current interrupt sources ASAP. */
887 DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
888 CSR0_TDMD | CSR0_INEA);
889
890 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
891 dev->name, csr0, DREG ));
892
893 if (csr0 & CSR0_RINT) /* Rx interrupt */
894 lance_rx( dev );
895
896 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
897 int dirty_tx = lp->dirty_tx;
898
899 while( dirty_tx < lp->cur_tx) {
900 int entry = dirty_tx & TX_RING_MOD_MASK;
901 int status = MEM->tx_head[entry].flag;
902
903 if (status & TMD1_OWN_CHIP)
904 break; /* It still hasn't been Txed */
905
906 MEM->tx_head[entry].flag = 0;
907
908 if (status & TMD1_ERR) {
909 /* There was an major error, log it. */
910 int err_status = MEM->tx_head[entry].misc;
911 dev->stats.tx_errors++;
912 if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
913 if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
914 if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++;
915 if (err_status & TMD3_UFLO) {
916 /* Ackk! On FIFO errors the Tx unit is turned off! */
917 dev->stats.tx_fifo_errors++;
918 /* Remove this verbosity later! */
919 DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
920 dev->name, csr0 ));
921 /* Restart the chip. */
922 DREG = CSR0_STRT;
923 }
924 } else {
925 if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
926 dev->stats.collisions++;
927 dev->stats.tx_packets++;
928 }
929
930 /* XXX MSch: free skb?? */
931 dirty_tx++;
932 }
933
934 #ifndef final_version
935 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
936 DPRINTK( 0, ( "out-of-sync dirty pointer,"
937 " %d vs. %d, full=%ld.\n",
938 dirty_tx, lp->cur_tx, lp->tx_full ));
939 dirty_tx += TX_RING_SIZE;
940 }
941 #endif
942
943 if (lp->tx_full && (netif_queue_stopped(dev))
944 && dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
945 /* The ring is no longer full, clear tbusy. */
946 lp->tx_full = 0;
947 netif_wake_queue (dev);
948 }
949
950 lp->dirty_tx = dirty_tx;
951 }
952
953 /* Log misc errors. */
954 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
955 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
956 if (csr0 & CSR0_MERR) {
957 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
958 "status %04x.\n", dev->name, csr0 ));
959 /* Restart the chip. */
960 DREG = CSR0_STRT;
961 }
962 }
963
964 /* Clear any other interrupt, and set interrupt enable. */
965 DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
966 CSR0_IDON | CSR0_INEA;
967
968 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
969 dev->name, DREG ));
970
971 spin_unlock (&lp->devlock);
972 return IRQ_RETVAL(handled);
973 }
974
975
976 static int lance_rx( struct net_device *dev )
977
978 { struct lance_private *lp = (struct lance_private *)dev->priv;
979 int entry = lp->cur_rx & RX_RING_MOD_MASK;
980 int i;
981
982 DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
983 MEM->rx_head[entry].flag ));
984
985 /* If we own the next entry, it's a new packet. Send it up. */
986 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
987 struct lance_rx_head *head = &(MEM->rx_head[entry]);
988 int status = head->flag;
989
990 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
991 /* There is a tricky error noted by John Murphy,
992 <murf@perftech.com> to Russ Nelson: Even with full-sized
993 buffers it's possible for a jabber packet to use two
994 buffers, with only the last correctly noting the error. */
995 if (status & RMD1_ENP) /* Only count a general error at the */
996 dev->stats.rx_errors++; /* end of a packet.*/
997 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
998 if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
999 if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
1000 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
1001 head->flag &= (RMD1_ENP|RMD1_STP);
1002 } else {
1003 /* Malloc up new buffer, compatible with net-3. */
1004 short pkt_len = head->msg_length & 0xfff;
1005 struct sk_buff *skb;
1006
1007 if (pkt_len < 60) {
1008 printk( "%s: Runt packet!\n", dev->name );
1009 dev->stats.rx_errors++;
1010 }
1011 else {
1012 skb = dev_alloc_skb( pkt_len+2 );
1013 if (skb == NULL) {
1014 DPRINTK( 1, ( "%s: Memory squeeze, deferring packet.\n",
1015 dev->name ));
1016 for( i = 0; i < RX_RING_SIZE; i++ )
1017 if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
1018 RMD1_OWN_CHIP)
1019 break;
1020
1021 if (i > RX_RING_SIZE - 2) {
1022 dev->stats.rx_dropped++;
1023 head->flag |= RMD1_OWN_CHIP;
1024 lp->cur_rx++;
1025 }
1026 break;
1027 }
1028
1029 if (lance_debug >= 3) {
1030 u_char *data = PKTBUF_ADDR(head);
1031 DECLARE_MAC_BUF(mac);
1032 DECLARE_MAC_BUF(mac2);
1033
1034 printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %s to %s "
1035 "data %02x %02x %02x %02x %02x %02x %02x %02x "
1036 "len %d\n",
1037 dev->name, ((u_short *)data)[6],
1038 print_mac(mac, &data[6]), print_mac(mac2, data),
1039 data[15], data[16], data[17], data[18],
1040 data[19], data[20], data[21], data[22],
1041 pkt_len);
1042 }
1043
1044 skb_reserve( skb, 2 ); /* 16 byte align */
1045 skb_put( skb, pkt_len ); /* Make room */
1046 lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
1047 skb->protocol = eth_type_trans( skb, dev );
1048 netif_rx( skb );
1049 dev->last_rx = jiffies;
1050 dev->stats.rx_packets++;
1051 dev->stats.rx_bytes += pkt_len;
1052 }
1053 }
1054
1055 head->flag |= RMD1_OWN_CHIP;
1056 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1057 }
1058 lp->cur_rx &= RX_RING_MOD_MASK;
1059
1060 /* From lance.c (Donald Becker): */
1061 /* We should check that at least two ring entries are free. If not,
1062 we should free one and mark stats->rx_dropped++. */
1063
1064 return 0;
1065 }
1066
1067
1068 static int lance_close( struct net_device *dev )
1069
1070 { struct lance_private *lp = (struct lance_private *)dev->priv;
1071 struct lance_ioreg *IO = lp->iobase;
1072
1073 netif_stop_queue (dev);
1074
1075 AREG = CSR0;
1076
1077 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
1078 dev->name, DREG ));
1079
1080 /* We stop the LANCE here -- it occasionally polls
1081 memory if we don't. */
1082 DREG = CSR0_STOP;
1083
1084 return 0;
1085 }
1086
1087
1088 /* Set or clear the multicast filter for this adaptor.
1089 num_addrs == -1 Promiscuous mode, receive all packets
1090 num_addrs == 0 Normal mode, clear multicast list
1091 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1092 best-effort filtering.
1093 */
1094
1095 static void set_multicast_list( struct net_device *dev )
1096
1097 { struct lance_private *lp = (struct lance_private *)dev->priv;
1098 struct lance_ioreg *IO = lp->iobase;
1099
1100 if (netif_running(dev))
1101 /* Only possible if board is already started */
1102 return;
1103
1104 /* We take the simple way out and always enable promiscuous mode. */
1105 DREG = CSR0_STOP; /* Temporarily stop the lance. */
1106
1107 if (dev->flags & IFF_PROMISC) {
1108 /* Log any net taps. */
1109 DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name ));
1110 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
1111 } else {
1112 short multicast_table[4];
1113 int num_addrs = dev->mc_count;
1114 int i;
1115 /* We don't use the multicast table, but rely on upper-layer
1116 * filtering. */
1117 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
1118 sizeof(multicast_table) );
1119 for( i = 0; i < 4; i++ )
1120 REGA( CSR8+i ) = multicast_table[i];
1121 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
1122 }
1123
1124 /*
1125 * Always set BSWP after a STOP as STOP puts it back into
1126 * little endian mode.
1127 */
1128 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
1129
1130 /* Resume normal operation and reset AREG to CSR0 */
1131 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
1132 }
1133
1134
1135 /* This is needed for old RieblCards and possible for new RieblCards */
1136
1137 static int lance_set_mac_address( struct net_device *dev, void *addr )
1138
1139 { struct lance_private *lp = (struct lance_private *)dev->priv;
1140 struct sockaddr *saddr = addr;
1141 int i;
1142
1143 if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
1144 return( -EOPNOTSUPP );
1145
1146 if (netif_running(dev)) {
1147 /* Only possible while card isn't started */
1148 DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
1149 dev->name ));
1150 return( -EIO );
1151 }
1152
1153 memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );
1154 for( i = 0; i < 6; i++ )
1155 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
1156 lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
1157 /* set also the magic for future sessions */
1158 *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
1159
1160 return( 0 );
1161 }
1162
1163
1164 #ifdef MODULE
1165 static struct net_device *atarilance_dev;
1166
1167 int __init init_module(void)
1168 {
1169 atarilance_dev = atarilance_probe(-1);
1170 if (IS_ERR(atarilance_dev))
1171 return PTR_ERR(atarilance_dev);
1172 return 0;
1173 }
1174
1175 void __exit cleanup_module(void)
1176 {
1177 unregister_netdev(atarilance_dev);
1178 free_irq(atarilance_dev->irq, atarilance_dev);
1179 free_netdev(atarilance_dev);
1180 }
1181
1182 #endif /* MODULE */
1183
1184
1185 /*
1186 * Local variables:
1187 * c-indent-level: 4
1188 * tab-width: 4
1189 * End:
1190 */
WRT350N Kernel Patches