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[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / amd / atarilance.c
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 const 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/interrupt.h>
57 #include <linux/init.h>
58 #include <linux/bitops.h>
59
60 #include <asm/setup.h>
61 #include <asm/irq.h>
62 #include <asm/atarihw.h>
63 #include <asm/atariints.h>
64 #include <asm/io.h>
65
66 /* Debug level:
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)
71 */
72
73 #define LANCE_DEBUG 1
74
75 #ifdef LANCE_DEBUG
76 static int lance_debug = LANCE_DEBUG;
77 #else
78 static int lance_debug = 1;
79 #endif
80 module_param(lance_debug, int, 0);
81 MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)");
82 MODULE_LICENSE("GPL");
83
84 /* Print debug messages on probing? */
85 #undef LANCE_DEBUG_PROBE
86
87 #define DPRINTK(n,a) \
88 do { \
89 if (lance_debug >= n) \
90 printk a; \
91 } while( 0 )
92
93 #ifdef LANCE_DEBUG_PROBE
94 # define PROBE_PRINT(a) printk a
95 #else
96 # define PROBE_PRINT(a)
97 #endif
98
99 /* These define the number of Rx and Tx buffers as log2. (Only powers
100 * of two are valid)
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.
104 */
105
106 #define TX_LOG_RING_SIZE 3
107 #define RX_LOG_RING_SIZE 5
108
109 /* These are the derived values */
110
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)
114
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)
118
119 #define TX_TIMEOUT (HZ/5)
120
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". */
128 };
129
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! */
135 volatile short misc;
136 };
137
138 struct ringdesc {
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) */
142 };
143
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;
152 };
153
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
162 * at runtime */
163 };
164
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.
171 */
172 #define RIEBL_RSVD_START 0xee70
173 #define RIEBL_RSVD_END 0xeec0
174 #define RIEBL_MAGIC 0x09051990
175 #define RIEBL_MAGIC_ADDR ((unsigned long *)(((char *)MEM) + 0xee8a))
176 #define RIEBL_HWADDR_ADDR ((unsigned char *)(((char *)MEM) + 0xee8e))
177 #define RIEBL_IVEC_ADDR ((unsigned short *)(((char *)MEM) + 0xfffe))
178
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.
182 */
183
184 static unsigned char OldRieblDefHwaddr[6] = {
185 0x00, 0x00, 0x36, 0x04, 0x00, 0x00
186 };
187
188
189 /* I/O registers of the Lance chip */
190
191 struct lance_ioreg {
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;
200 };
201
202 /* Types of boards this driver supports */
203
204 enum lance_type {
205 OLD_RIEBL, /* old Riebl card without battery */
206 NEW_RIEBL, /* new Riebl card with battery */
207 PAM_CARD /* PAM card with EEPROM */
208 };
209
210 static char *lance_names[] = {
211 "Riebl-Card (without battery)",
212 "Riebl-Card (with battery)",
213 "PAM intern card"
214 };
215
216 /* The driver's private device structure */
217
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. */
224 /* copy function */
225 void *(*memcpy_f)( void *, const void *, size_t );
226 /* This must be long for set_bit() */
227 long tx_full;
228 spinlock_t devlock;
229 };
230
231 /* I/O register access macros */
232
233 #define MEM lp->mem
234 #define DREG IO->data
235 #define AREG IO->addr
236 #define REGA(a) (*( AREG = (a), &DREG ))
237
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)
242
243 /* Possible memory/IO addresses for probing */
244
245 static struct lance_addr {
246 unsigned long memaddr;
247 unsigned long ioaddr;
248 int slow_flag;
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) */
262 };
263
264 #define N_LANCE_ADDR ARRAY_SIZE(lance_addr_list)
265
266
267 /* Definitions for the Lance */
268
269 /* tx_head flags */
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) */
277
278 #define TMD1_OWN_CHIP TMD1_OWN
279 #define TMD1_OWN_HOST 0
280
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) */
288
289 /* rx_head flags */
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) */
298
299 #define RMD1_OWN_CHIP RMD1_OWN
300 #define RMD1_OWN_HOST 0
301
302 /* register names */
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 */
309
310 /* CSR0 */
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) */
328
329 /* CSR3 */
330 #define CSR3_BCON 0x0001 /* byte control */
331 #define CSR3_ACON 0x0002 /* ALE control */
332 #define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
333
334
335
336 /***************************** Prototypes *****************************/
337
338 static unsigned long lance_probe1( struct net_device *dev, struct lance_addr
339 *init_rec );
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 );
345 static int lance_close( struct net_device *dev );
346 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);
349
350 /************************* End of Prototypes **************************/
351
352
353
354
355
356 static void *slow_memcpy( void *dst, const void *src, size_t len )
357
358 { char *cto = dst;
359 const char *cfrom = src;
360
361 while( len-- ) {
362 *cto++ = *cfrom++;
363 MFPDELAY();
364 }
365 return dst;
366 }
367
368
369 struct net_device * __init atarilance_probe(int unit)
370 {
371 int i;
372 static int found;
373 struct net_device *dev;
374 int err = -ENODEV;
375
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);
380
381 dev = alloc_etherdev(sizeof(struct lance_private));
382 if (!dev)
383 return ERR_PTR(-ENOMEM);
384 if (unit >= 0) {
385 sprintf(dev->name, "eth%d", unit);
386 netdev_boot_setup_check(dev);
387 }
388
389 for( i = 0; i < N_LANCE_ADDR; ++i ) {
390 if (lance_probe1( dev, &lance_addr_list[i] )) {
391 found = 1;
392 err = register_netdev(dev);
393 if (!err)
394 return dev;
395 free_irq(dev->irq, dev);
396 break;
397 }
398 }
399 free_netdev(dev);
400 return ERR_PTR(err);
401 }
402
403
404 /* Derived from hwreg_present() in atari/config.c: */
405
406 static noinline int __init addr_accessible(volatile void *regp, int wordflag,
407 int writeflag)
408 {
409 int ret;
410 unsigned long flags;
411 long *vbr, save_berr;
412
413 local_irq_save(flags);
414
415 __asm__ __volatile__ ( "movec %/vbr,%0" : "=r" (vbr) : );
416 save_berr = vbr[2];
417
418 __asm__ __volatile__
419 ( "movel %/sp,%/d1\n\t"
420 "movel #Lberr,%2@\n\t"
421 "moveq #0,%0\n\t"
422 "tstl %3\n\t"
423 "bne 1f\n\t"
424 "moveb %1@,%/d0\n\t"
425 "nop \n\t"
426 "bra 2f\n"
427 "1: movew %1@,%/d0\n\t"
428 "nop \n"
429 "2: tstl %4\n\t"
430 "beq 2f\n\t"
431 "tstl %3\n\t"
432 "bne 1f\n\t"
433 "clrb %1@\n\t"
434 "nop \n\t"
435 "moveb %/d0,%1@\n\t"
436 "nop \n\t"
437 "bra 2f\n"
438 "1: clrw %1@\n\t"
439 "nop \n\t"
440 "movew %/d0,%1@\n\t"
441 "nop \n"
442 "2: moveq #1,%0\n"
443 "Lberr: movel %/d1,%/sp"
444 : "=&d" (ret)
445 : "a" (regp), "a" (&vbr[2]), "rm" (wordflag), "rm" (writeflag)
446 : "d0", "d1", "memory"
447 );
448
449 vbr[2] = save_berr;
450 local_irq_restore(flags);
451
452 return ret;
453 }
454
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,
459 .ndo_set_rx_mode = set_multicast_list,
460 .ndo_set_mac_address = lance_set_mac_address,
461 .ndo_tx_timeout = lance_tx_timeout,
462 .ndo_validate_addr = eth_validate_addr,
463 };
464
465 static unsigned long __init lance_probe1( struct net_device *dev,
466 struct lance_addr *init_rec )
467 {
468 volatile unsigned short *memaddr =
469 (volatile unsigned short *)init_rec->memaddr;
470 volatile unsigned short *ioaddr =
471 (volatile unsigned short *)init_rec->ioaddr;
472 struct lance_private *lp;
473 struct lance_ioreg *IO;
474 int i;
475 static int did_version;
476 unsigned short save1, save2;
477
478 PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
479 (long)memaddr, (long)ioaddr ));
480
481 /* Test whether memory readable and writable */
482 PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
483 if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;
484
485 /* Written values should come back... */
486 PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
487 save1 = *memaddr;
488 *memaddr = 0x0001;
489 if (*memaddr != 0x0001) goto probe_fail;
490 PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
491 *memaddr = 0x0000;
492 if (*memaddr != 0x0000) goto probe_fail;
493 *memaddr = save1;
494
495 /* First port should be readable and writable */
496 PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
497 if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;
498
499 /* and written values should be readable */
500 PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
501 save2 = ioaddr[1];
502 ioaddr[1] = 0x0001;
503 if (ioaddr[1] != 0x0001) goto probe_fail;
504
505 /* The CSR0_INIT bit should not be readable */
506 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
507 save1 = ioaddr[0];
508 ioaddr[1] = CSR0;
509 ioaddr[0] = CSR0_INIT | CSR0_STOP;
510 if (ioaddr[0] != CSR0_STOP) {
511 ioaddr[0] = save1;
512 ioaddr[1] = save2;
513 goto probe_fail;
514 }
515 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
516 ioaddr[0] = CSR0_STOP;
517 if (ioaddr[0] != CSR0_STOP) {
518 ioaddr[0] = save1;
519 ioaddr[1] = save2;
520 goto probe_fail;
521 }
522
523 /* Now ok... */
524 PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
525 goto probe_ok;
526
527 probe_fail:
528 return 0;
529
530 probe_ok:
531 lp = netdev_priv(dev);
532 MEM = (struct lance_memory *)memaddr;
533 IO = lp->iobase = (struct lance_ioreg *)ioaddr;
534 dev->base_addr = (unsigned long)ioaddr; /* informational only */
535 lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;
536
537 REGA( CSR0 ) = CSR0_STOP;
538
539 /* Now test for type: If the eeprom I/O port is readable, it is a
540 * PAM card */
541 if (addr_accessible( &(IO->eeprom), 0, 0 )) {
542 /* Switch back to Ram */
543 i = IO->mem;
544 lp->cardtype = PAM_CARD;
545 }
546 else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
547 lp->cardtype = NEW_RIEBL;
548 }
549 else
550 lp->cardtype = OLD_RIEBL;
551
552 if (lp->cardtype == PAM_CARD ||
553 memaddr == (unsigned short *)0xffe00000) {
554 /* PAMs card and Riebl on ST use level 5 autovector */
555 if (request_irq(IRQ_AUTO_5, lance_interrupt, 0,
556 "PAM,Riebl-ST Ethernet", dev)) {
557 printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 );
558 return 0;
559 }
560 dev->irq = IRQ_AUTO_5;
561 }
562 else {
563 /* For VME-RieblCards, request a free VME int */
564 unsigned int irq = atari_register_vme_int();
565 if (!irq) {
566 printk( "Lance: request for VME interrupt failed\n" );
567 return 0;
568 }
569 if (request_irq(irq, lance_interrupt, 0, "Riebl-VME Ethernet",
570 dev)) {
571 printk( "Lance: request for irq %u failed\n", irq );
572 return 0;
573 }
574 dev->irq = irq;
575 }
576
577 printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
578 dev->name, lance_names[lp->cardtype],
579 (unsigned long)ioaddr,
580 (unsigned long)memaddr,
581 dev->irq,
582 init_rec->slow_flag ? " (slow memcpy)" : "" );
583
584 /* Get the ethernet address */
585 switch( lp->cardtype ) {
586 case OLD_RIEBL:
587 /* No ethernet address! (Set some default address) */
588 memcpy(dev->dev_addr, OldRieblDefHwaddr, ETH_ALEN);
589 break;
590 case NEW_RIEBL:
591 lp->memcpy_f(dev->dev_addr, RIEBL_HWADDR_ADDR, ETH_ALEN);
592 break;
593 case PAM_CARD:
594 i = IO->eeprom;
595 for( i = 0; i < 6; ++i )
596 dev->dev_addr[i] =
597 ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
598 ((((unsigned short *)MEM)[i*2+1] & 0x0f));
599 i = IO->mem;
600 break;
601 }
602 printk("%pM\n", dev->dev_addr);
603 if (lp->cardtype == OLD_RIEBL) {
604 printk( "%s: Warning: This is a default ethernet address!\n",
605 dev->name );
606 printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
607 }
608
609 spin_lock_init(&lp->devlock);
610
611 MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
612 for( i = 0; i < 6; i++ )
613 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
614 MEM->init.filter[0] = 0x00000000;
615 MEM->init.filter[1] = 0x00000000;
616 MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
617 MEM->init.rx_ring.adr_hi = 0;
618 MEM->init.rx_ring.len = RX_RING_LEN_BITS;
619 MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
620 MEM->init.tx_ring.adr_hi = 0;
621 MEM->init.tx_ring.len = TX_RING_LEN_BITS;
622
623 if (lp->cardtype == PAM_CARD)
624 IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
625 else
626 *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
627
628 if (did_version++ == 0)
629 DPRINTK( 1, ( version ));
630
631 dev->netdev_ops = &lance_netdev_ops;
632
633 /* XXX MSch */
634 dev->watchdog_timeo = TX_TIMEOUT;
635
636 return 1;
637 }
638
639
640 static int lance_open( struct net_device *dev )
641 {
642 struct lance_private *lp = netdev_priv(dev);
643 struct lance_ioreg *IO = lp->iobase;
644 int i;
645
646 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
647
648 lance_init_ring(dev);
649 /* Re-initialize the LANCE, and start it when done. */
650
651 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
652 REGA( CSR2 ) = 0;
653 REGA( CSR1 ) = 0;
654 REGA( CSR0 ) = CSR0_INIT;
655 /* From now on, AREG is kept to point to CSR0 */
656
657 i = 1000000;
658 while (--i > 0)
659 if (DREG & CSR0_IDON)
660 break;
661 if (i <= 0 || (DREG & CSR0_ERR)) {
662 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
663 dev->name, i, DREG ));
664 DREG = CSR0_STOP;
665 return -EIO;
666 }
667 DREG = CSR0_IDON;
668 DREG = CSR0_STRT;
669 DREG = CSR0_INEA;
670
671 netif_start_queue (dev);
672
673 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
674
675 return 0;
676 }
677
678
679 /* Initialize the LANCE Rx and Tx rings. */
680
681 static void lance_init_ring( struct net_device *dev )
682 {
683 struct lance_private *lp = netdev_priv(dev);
684 int i;
685 unsigned offset;
686
687 lp->tx_full = 0;
688 lp->cur_rx = lp->cur_tx = 0;
689 lp->dirty_tx = 0;
690
691 offset = offsetof( struct lance_memory, packet_area );
692
693 /* If the packet buffer at offset 'o' would conflict with the reserved area
694 * of RieblCards, advance it */
695 #define CHECK_OFFSET(o) \
696 do { \
697 if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
698 if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
699 : (o) < RIEBL_RSVD_END) \
700 (o) = RIEBL_RSVD_END; \
701 } \
702 } while(0)
703
704 for( i = 0; i < TX_RING_SIZE; i++ ) {
705 CHECK_OFFSET(offset);
706 MEM->tx_head[i].base = offset;
707 MEM->tx_head[i].flag = TMD1_OWN_HOST;
708 MEM->tx_head[i].base_hi = 0;
709 MEM->tx_head[i].length = 0;
710 MEM->tx_head[i].misc = 0;
711 offset += PKT_BUF_SZ;
712 }
713
714 for( i = 0; i < RX_RING_SIZE; i++ ) {
715 CHECK_OFFSET(offset);
716 MEM->rx_head[i].base = offset;
717 MEM->rx_head[i].flag = TMD1_OWN_CHIP;
718 MEM->rx_head[i].base_hi = 0;
719 MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
720 MEM->rx_head[i].msg_length = 0;
721 offset += PKT_BUF_SZ;
722 }
723 }
724
725
726 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
727
728
729 static void lance_tx_timeout (struct net_device *dev)
730 {
731 struct lance_private *lp = netdev_priv(dev);
732 struct lance_ioreg *IO = lp->iobase;
733
734 AREG = CSR0;
735 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
736 dev->name, DREG ));
737 DREG = CSR0_STOP;
738 /*
739 * Always set BSWP after a STOP as STOP puts it back into
740 * little endian mode.
741 */
742 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
743 dev->stats.tx_errors++;
744 #ifndef final_version
745 { int i;
746 DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
747 lp->dirty_tx, lp->cur_tx,
748 lp->tx_full ? " (full)" : "",
749 lp->cur_rx ));
750 for( i = 0 ; i < RX_RING_SIZE; i++ )
751 DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
752 i, MEM->rx_head[i].base,
753 -MEM->rx_head[i].buf_length,
754 MEM->rx_head[i].msg_length ));
755 for( i = 0 ; i < TX_RING_SIZE; i++ )
756 DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
757 i, MEM->tx_head[i].base,
758 -MEM->tx_head[i].length,
759 MEM->tx_head[i].misc ));
760 }
761 #endif
762 /* XXX MSch: maybe purge/reinit ring here */
763 /* lance_restart, essentially */
764 lance_init_ring(dev);
765 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
766 netif_trans_update(dev); /* prevent tx timeout */
767 netif_wake_queue(dev);
768 }
769
770 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
771
772 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
773 {
774 struct lance_private *lp = netdev_priv(dev);
775 struct lance_ioreg *IO = lp->iobase;
776 int entry, len;
777 struct lance_tx_head *head;
778 unsigned long flags;
779
780 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
781 dev->name, DREG ));
782
783
784 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
785 len = skb->len;
786 if (len < ETH_ZLEN)
787 len = ETH_ZLEN;
788 /* PAM-Card has a bug: Can only send packets with even number of bytes! */
789 else if (lp->cardtype == PAM_CARD && (len & 1))
790 ++len;
791
792 if (len > skb->len) {
793 if (skb_padto(skb, len))
794 return NETDEV_TX_OK;
795 }
796
797 netif_stop_queue (dev);
798
799 /* Fill in a Tx ring entry */
800 if (lance_debug >= 3) {
801 printk( "%s: TX pkt type 0x%04x from %pM to %pM"
802 " data at 0x%08x len %d\n",
803 dev->name, ((u_short *)skb->data)[6],
804 &skb->data[6], skb->data,
805 (int)skb->data, (int)skb->len );
806 }
807
808 /* We're not prepared for the int until the last flags are set/reset. And
809 * the int may happen already after setting the OWN_CHIP... */
810 spin_lock_irqsave (&lp->devlock, flags);
811
812 /* Mask to ring buffer boundary. */
813 entry = lp->cur_tx & TX_RING_MOD_MASK;
814 head = &(MEM->tx_head[entry]);
815
816 /* Caution: the write order is important here, set the "ownership" bits
817 * last.
818 */
819
820
821 head->length = -len;
822 head->misc = 0;
823 lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
824 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
825 dev->stats.tx_bytes += skb->len;
826 dev_kfree_skb( skb );
827 lp->cur_tx++;
828 while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
829 lp->cur_tx -= TX_RING_SIZE;
830 lp->dirty_tx -= TX_RING_SIZE;
831 }
832
833 /* Trigger an immediate send poll. */
834 DREG = CSR0_INEA | CSR0_TDMD;
835
836 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
837 TMD1_OWN_HOST)
838 netif_start_queue (dev);
839 else
840 lp->tx_full = 1;
841 spin_unlock_irqrestore (&lp->devlock, flags);
842
843 return NETDEV_TX_OK;
844 }
845
846 /* The LANCE interrupt handler. */
847
848 static irqreturn_t lance_interrupt( int irq, void *dev_id )
849 {
850 struct net_device *dev = dev_id;
851 struct lance_private *lp;
852 struct lance_ioreg *IO;
853 int csr0, boguscnt = 10;
854 int handled = 0;
855
856 if (dev == NULL) {
857 DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
858 return IRQ_NONE;
859 }
860
861 lp = netdev_priv(dev);
862 IO = lp->iobase;
863 spin_lock (&lp->devlock);
864
865 AREG = CSR0;
866
867 while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
868 --boguscnt >= 0) {
869 handled = 1;
870 /* Acknowledge all of the current interrupt sources ASAP. */
871 DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
872 CSR0_TDMD | CSR0_INEA);
873
874 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
875 dev->name, csr0, DREG ));
876
877 if (csr0 & CSR0_RINT) /* Rx interrupt */
878 lance_rx( dev );
879
880 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
881 int dirty_tx = lp->dirty_tx;
882
883 while( dirty_tx < lp->cur_tx) {
884 int entry = dirty_tx & TX_RING_MOD_MASK;
885 int status = MEM->tx_head[entry].flag;
886
887 if (status & TMD1_OWN_CHIP)
888 break; /* It still hasn't been Txed */
889
890 MEM->tx_head[entry].flag = 0;
891
892 if (status & TMD1_ERR) {
893 /* There was an major error, log it. */
894 int err_status = MEM->tx_head[entry].misc;
895 dev->stats.tx_errors++;
896 if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
897 if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
898 if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++;
899 if (err_status & TMD3_UFLO) {
900 /* Ackk! On FIFO errors the Tx unit is turned off! */
901 dev->stats.tx_fifo_errors++;
902 /* Remove this verbosity later! */
903 DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
904 dev->name, csr0 ));
905 /* Restart the chip. */
906 DREG = CSR0_STRT;
907 }
908 } else {
909 if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
910 dev->stats.collisions++;
911 dev->stats.tx_packets++;
912 }
913
914 /* XXX MSch: free skb?? */
915 dirty_tx++;
916 }
917
918 #ifndef final_version
919 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
920 DPRINTK( 0, ( "out-of-sync dirty pointer,"
921 " %d vs. %d, full=%ld.\n",
922 dirty_tx, lp->cur_tx, lp->tx_full ));
923 dirty_tx += TX_RING_SIZE;
924 }
925 #endif
926
927 if (lp->tx_full && (netif_queue_stopped(dev)) &&
928 dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
929 /* The ring is no longer full, clear tbusy. */
930 lp->tx_full = 0;
931 netif_wake_queue (dev);
932 }
933
934 lp->dirty_tx = dirty_tx;
935 }
936
937 /* Log misc errors. */
938 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
939 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
940 if (csr0 & CSR0_MERR) {
941 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
942 "status %04x.\n", dev->name, csr0 ));
943 /* Restart the chip. */
944 DREG = CSR0_STRT;
945 }
946 }
947
948 /* Clear any other interrupt, and set interrupt enable. */
949 DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
950 CSR0_IDON | CSR0_INEA;
951
952 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
953 dev->name, DREG ));
954
955 spin_unlock (&lp->devlock);
956 return IRQ_RETVAL(handled);
957 }
958
959
960 static int lance_rx( struct net_device *dev )
961 {
962 struct lance_private *lp = netdev_priv(dev);
963 int entry = lp->cur_rx & RX_RING_MOD_MASK;
964 int i;
965
966 DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
967 MEM->rx_head[entry].flag ));
968
969 /* If we own the next entry, it's a new packet. Send it up. */
970 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
971 struct lance_rx_head *head = &(MEM->rx_head[entry]);
972 int status = head->flag;
973
974 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
975 /* There is a tricky error noted by John Murphy,
976 <murf@perftech.com> to Russ Nelson: Even with full-sized
977 buffers it's possible for a jabber packet to use two
978 buffers, with only the last correctly noting the error. */
979 if (status & RMD1_ENP) /* Only count a general error at the */
980 dev->stats.rx_errors++; /* end of a packet.*/
981 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
982 if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
983 if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
984 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
985 head->flag &= (RMD1_ENP|RMD1_STP);
986 } else {
987 /* Malloc up new buffer, compatible with net-3. */
988 short pkt_len = head->msg_length & 0xfff;
989 struct sk_buff *skb;
990
991 if (pkt_len < 60) {
992 printk( "%s: Runt packet!\n", dev->name );
993 dev->stats.rx_errors++;
994 }
995 else {
996 skb = netdev_alloc_skb(dev, pkt_len + 2);
997 if (skb == NULL) {
998 for( i = 0; i < RX_RING_SIZE; i++ )
999 if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
1000 RMD1_OWN_CHIP)
1001 break;
1002
1003 if (i > RX_RING_SIZE - 2) {
1004 dev->stats.rx_dropped++;
1005 head->flag |= RMD1_OWN_CHIP;
1006 lp->cur_rx++;
1007 }
1008 break;
1009 }
1010
1011 if (lance_debug >= 3) {
1012 u_char *data = PKTBUF_ADDR(head);
1013
1014 printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %pM to %pM "
1015 "data %8ph len %d\n",
1016 dev->name, ((u_short *)data)[6],
1017 &data[6], data, &data[15], pkt_len);
1018 }
1019
1020 skb_reserve( skb, 2 ); /* 16 byte align */
1021 skb_put( skb, pkt_len ); /* Make room */
1022 lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
1023 skb->protocol = eth_type_trans( skb, dev );
1024 netif_rx( skb );
1025 dev->stats.rx_packets++;
1026 dev->stats.rx_bytes += pkt_len;
1027 }
1028 }
1029
1030 head->flag |= RMD1_OWN_CHIP;
1031 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1032 }
1033 lp->cur_rx &= RX_RING_MOD_MASK;
1034
1035 /* From lance.c (Donald Becker): */
1036 /* We should check that at least two ring entries are free. If not,
1037 we should free one and mark stats->rx_dropped++. */
1038
1039 return 0;
1040 }
1041
1042
1043 static int lance_close( struct net_device *dev )
1044 {
1045 struct lance_private *lp = netdev_priv(dev);
1046 struct lance_ioreg *IO = lp->iobase;
1047
1048 netif_stop_queue (dev);
1049
1050 AREG = CSR0;
1051
1052 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
1053 dev->name, DREG ));
1054
1055 /* We stop the LANCE here -- it occasionally polls
1056 memory if we don't. */
1057 DREG = CSR0_STOP;
1058
1059 return 0;
1060 }
1061
1062
1063 /* Set or clear the multicast filter for this adaptor.
1064 num_addrs == -1 Promiscuous mode, receive all packets
1065 num_addrs == 0 Normal mode, clear multicast list
1066 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1067 best-effort filtering.
1068 */
1069
1070 static void set_multicast_list( struct net_device *dev )
1071 {
1072 struct lance_private *lp = netdev_priv(dev);
1073 struct lance_ioreg *IO = lp->iobase;
1074
1075 if (netif_running(dev))
1076 /* Only possible if board is already started */
1077 return;
1078
1079 /* We take the simple way out and always enable promiscuous mode. */
1080 DREG = CSR0_STOP; /* Temporarily stop the lance. */
1081
1082 if (dev->flags & IFF_PROMISC) {
1083 /* Log any net taps. */
1084 DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name ));
1085 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
1086 } else {
1087 short multicast_table[4];
1088 int num_addrs = netdev_mc_count(dev);
1089 int i;
1090 /* We don't use the multicast table, but rely on upper-layer
1091 * filtering. */
1092 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
1093 sizeof(multicast_table) );
1094 for( i = 0; i < 4; i++ )
1095 REGA( CSR8+i ) = multicast_table[i];
1096 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
1097 }
1098
1099 /*
1100 * Always set BSWP after a STOP as STOP puts it back into
1101 * little endian mode.
1102 */
1103 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
1104
1105 /* Resume normal operation and reset AREG to CSR0 */
1106 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
1107 }
1108
1109
1110 /* This is needed for old RieblCards and possible for new RieblCards */
1111
1112 static int lance_set_mac_address( struct net_device *dev, void *addr )
1113 {
1114 struct lance_private *lp = netdev_priv(dev);
1115 struct sockaddr *saddr = addr;
1116 int i;
1117
1118 if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
1119 return -EOPNOTSUPP;
1120
1121 if (netif_running(dev)) {
1122 /* Only possible while card isn't started */
1123 DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
1124 dev->name ));
1125 return -EIO;
1126 }
1127
1128 memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );
1129 for( i = 0; i < 6; i++ )
1130 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
1131 lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
1132 /* set also the magic for future sessions */
1133 *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
1134
1135 return 0;
1136 }
1137
1138
1139 #ifdef MODULE
1140 static struct net_device *atarilance_dev;
1141
1142 static int __init atarilance_module_init(void)
1143 {
1144 atarilance_dev = atarilance_probe(-1);
1145 return PTR_ERR_OR_ZERO(atarilance_dev);
1146 }
1147
1148 static void __exit atarilance_module_exit(void)
1149 {
1150 unregister_netdev(atarilance_dev);
1151 free_irq(atarilance_dev->irq, atarilance_dev);
1152 free_netdev(atarilance_dev);
1153 }
1154 module_init(atarilance_module_init);
1155 module_exit(atarilance_module_exit);
1156 #endif /* MODULE */
1157
1158
1159 /*
1160 * Local variables:
1161 * c-indent-level: 4
1162 * tab-width: 4
1163 * End:
1164 */
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