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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[deliverable/linux.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 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 .ndo_change_mtu = eth_change_mtu,
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
479 PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
480 (long)memaddr, (long)ioaddr ));
481
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;
485
486 /* Written values should come back... */
487 PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
488 save1 = *memaddr;
489 *memaddr = 0x0001;
490 if (*memaddr != 0x0001) goto probe_fail;
491 PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
492 *memaddr = 0x0000;
493 if (*memaddr != 0x0000) goto probe_fail;
494 *memaddr = save1;
495
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;
499
500 /* and written values should be readable */
501 PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
502 save2 = ioaddr[1];
503 ioaddr[1] = 0x0001;
504 if (ioaddr[1] != 0x0001) goto probe_fail;
505
506 /* The CSR0_INIT bit should not be readable */
507 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
508 save1 = ioaddr[0];
509 ioaddr[1] = CSR0;
510 ioaddr[0] = CSR0_INIT | CSR0_STOP;
511 if (ioaddr[0] != CSR0_STOP) {
512 ioaddr[0] = save1;
513 ioaddr[1] = save2;
514 goto probe_fail;
515 }
516 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
517 ioaddr[0] = CSR0_STOP;
518 if (ioaddr[0] != CSR0_STOP) {
519 ioaddr[0] = save1;
520 ioaddr[1] = save2;
521 goto probe_fail;
522 }
523
524 /* Now ok... */
525 PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
526 goto probe_ok;
527
528 probe_fail:
529 return 0;
530
531 probe_ok:
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;
537
538 REGA( CSR0 ) = CSR0_STOP;
539
540 /* Now test for type: If the eeprom I/O port is readable, it is a
541 * PAM card */
542 if (addr_accessible( &(IO->eeprom), 0, 0 )) {
543 /* Switch back to Ram */
544 i = IO->mem;
545 lp->cardtype = PAM_CARD;
546 }
547 else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
548 lp->cardtype = NEW_RIEBL;
549 }
550 else
551 lp->cardtype = OLD_RIEBL;
552
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, 0,
557 "PAM,Riebl-ST Ethernet", dev)) {
558 printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 );
559 return 0;
560 }
561 dev->irq = IRQ_AUTO_5;
562 }
563 else {
564 /* For VME-RieblCards, request a free VME int */
565 unsigned int irq = atari_register_vme_int();
566 if (!irq) {
567 printk( "Lance: request for VME interrupt failed\n" );
568 return 0;
569 }
570 if (request_irq(irq, lance_interrupt, 0, "Riebl-VME Ethernet",
571 dev)) {
572 printk( "Lance: request for irq %u failed\n", irq );
573 return 0;
574 }
575 dev->irq = irq;
576 }
577
578 printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
579 dev->name, lance_names[lp->cardtype],
580 (unsigned long)ioaddr,
581 (unsigned long)memaddr,
582 dev->irq,
583 init_rec->slow_flag ? " (slow memcpy)" : "" );
584
585 /* Get the ethernet address */
586 switch( lp->cardtype ) {
587 case OLD_RIEBL:
588 /* No ethernet address! (Set some default address) */
589 memcpy(dev->dev_addr, OldRieblDefHwaddr, ETH_ALEN);
590 break;
591 case NEW_RIEBL:
592 lp->memcpy_f(dev->dev_addr, RIEBL_HWADDR_ADDR, ETH_ALEN);
593 break;
594 case PAM_CARD:
595 i = IO->eeprom;
596 for( i = 0; i < 6; ++i )
597 dev->dev_addr[i] =
598 ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
599 ((((unsigned short *)MEM)[i*2+1] & 0x0f));
600 i = IO->mem;
601 break;
602 }
603 printk("%pM\n", dev->dev_addr);
604 if (lp->cardtype == OLD_RIEBL) {
605 printk( "%s: Warning: This is a default ethernet address!\n",
606 dev->name );
607 printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
608 }
609
610 spin_lock_init(&lp->devlock);
611
612 MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
613 for( i = 0; i < 6; i++ )
614 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
615 MEM->init.filter[0] = 0x00000000;
616 MEM->init.filter[1] = 0x00000000;
617 MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
618 MEM->init.rx_ring.adr_hi = 0;
619 MEM->init.rx_ring.len = RX_RING_LEN_BITS;
620 MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
621 MEM->init.tx_ring.adr_hi = 0;
622 MEM->init.tx_ring.len = TX_RING_LEN_BITS;
623
624 if (lp->cardtype == PAM_CARD)
625 IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
626 else
627 *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
628
629 if (did_version++ == 0)
630 DPRINTK( 1, ( version ));
631
632 dev->netdev_ops = &lance_netdev_ops;
633
634 /* XXX MSch */
635 dev->watchdog_timeo = TX_TIMEOUT;
636
637 return 1;
638 }
639
640
641 static int lance_open( struct net_device *dev )
642 {
643 struct lance_private *lp = netdev_priv(dev);
644 struct lance_ioreg *IO = lp->iobase;
645 int i;
646
647 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
648
649 lance_init_ring(dev);
650 /* Re-initialize the LANCE, and start it when done. */
651
652 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
653 REGA( CSR2 ) = 0;
654 REGA( CSR1 ) = 0;
655 REGA( CSR0 ) = CSR0_INIT;
656 /* From now on, AREG is kept to point to CSR0 */
657
658 i = 1000000;
659 while (--i > 0)
660 if (DREG & CSR0_IDON)
661 break;
662 if (i <= 0 || (DREG & CSR0_ERR)) {
663 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
664 dev->name, i, DREG ));
665 DREG = CSR0_STOP;
666 return -EIO;
667 }
668 DREG = CSR0_IDON;
669 DREG = CSR0_STRT;
670 DREG = CSR0_INEA;
671
672 netif_start_queue (dev);
673
674 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
675
676 return 0;
677 }
678
679
680 /* Initialize the LANCE Rx and Tx rings. */
681
682 static void lance_init_ring( struct net_device *dev )
683 {
684 struct lance_private *lp = netdev_priv(dev);
685 int i;
686 unsigned offset;
687
688 lp->tx_full = 0;
689 lp->cur_rx = lp->cur_tx = 0;
690 lp->dirty_tx = 0;
691
692 offset = offsetof( struct lance_memory, packet_area );
693
694 /* If the packet buffer at offset 'o' would conflict with the reserved area
695 * of RieblCards, advance it */
696 #define CHECK_OFFSET(o) \
697 do { \
698 if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
699 if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
700 : (o) < RIEBL_RSVD_END) \
701 (o) = RIEBL_RSVD_END; \
702 } \
703 } while(0)
704
705 for( i = 0; i < TX_RING_SIZE; i++ ) {
706 CHECK_OFFSET(offset);
707 MEM->tx_head[i].base = offset;
708 MEM->tx_head[i].flag = TMD1_OWN_HOST;
709 MEM->tx_head[i].base_hi = 0;
710 MEM->tx_head[i].length = 0;
711 MEM->tx_head[i].misc = 0;
712 offset += PKT_BUF_SZ;
713 }
714
715 for( i = 0; i < RX_RING_SIZE; i++ ) {
716 CHECK_OFFSET(offset);
717 MEM->rx_head[i].base = offset;
718 MEM->rx_head[i].flag = TMD1_OWN_CHIP;
719 MEM->rx_head[i].base_hi = 0;
720 MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
721 MEM->rx_head[i].msg_length = 0;
722 offset += PKT_BUF_SZ;
723 }
724 }
725
726
727 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
728
729
730 static void lance_tx_timeout (struct net_device *dev)
731 {
732 struct lance_private *lp = netdev_priv(dev);
733 struct lance_ioreg *IO = lp->iobase;
734
735 AREG = CSR0;
736 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
737 dev->name, DREG ));
738 DREG = CSR0_STOP;
739 /*
740 * Always set BSWP after a STOP as STOP puts it back into
741 * little endian mode.
742 */
743 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
744 dev->stats.tx_errors++;
745 #ifndef final_version
746 { int i;
747 DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
748 lp->dirty_tx, lp->cur_tx,
749 lp->tx_full ? " (full)" : "",
750 lp->cur_rx ));
751 for( i = 0 ; i < RX_RING_SIZE; i++ )
752 DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
753 i, MEM->rx_head[i].base,
754 -MEM->rx_head[i].buf_length,
755 MEM->rx_head[i].msg_length ));
756 for( i = 0 ; i < TX_RING_SIZE; i++ )
757 DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
758 i, MEM->tx_head[i].base,
759 -MEM->tx_head[i].length,
760 MEM->tx_head[i].misc ));
761 }
762 #endif
763 /* XXX MSch: maybe purge/reinit ring here */
764 /* lance_restart, essentially */
765 lance_init_ring(dev);
766 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
767 dev->trans_start = jiffies; /* prevent tx timeout */
768 netif_wake_queue(dev);
769 }
770
771 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
772
773 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
774 {
775 struct lance_private *lp = netdev_priv(dev);
776 struct lance_ioreg *IO = lp->iobase;
777 int entry, len;
778 struct lance_tx_head *head;
779 unsigned long flags;
780
781 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
782 dev->name, DREG ));
783
784
785 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
786 len = skb->len;
787 if (len < ETH_ZLEN)
788 len = ETH_ZLEN;
789 /* PAM-Card has a bug: Can only send packets with even number of bytes! */
790 else if (lp->cardtype == PAM_CARD && (len & 1))
791 ++len;
792
793 if (len > skb->len) {
794 if (skb_padto(skb, len))
795 return NETDEV_TX_OK;
796 }
797
798 netif_stop_queue (dev);
799
800 /* Fill in a Tx ring entry */
801 if (lance_debug >= 3) {
802 printk( "%s: TX pkt type 0x%04x from %pM to %pM"
803 " data at 0x%08x len %d\n",
804 dev->name, ((u_short *)skb->data)[6],
805 &skb->data[6], skb->data,
806 (int)skb->data, (int)skb->len );
807 }
808
809 /* We're not prepared for the int until the last flags are set/reset. And
810 * the int may happen already after setting the OWN_CHIP... */
811 spin_lock_irqsave (&lp->devlock, flags);
812
813 /* Mask to ring buffer boundary. */
814 entry = lp->cur_tx & TX_RING_MOD_MASK;
815 head = &(MEM->tx_head[entry]);
816
817 /* Caution: the write order is important here, set the "ownership" bits
818 * last.
819 */
820
821
822 head->length = -len;
823 head->misc = 0;
824 lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
825 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
826 dev->stats.tx_bytes += skb->len;
827 dev_kfree_skb( skb );
828 lp->cur_tx++;
829 while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
830 lp->cur_tx -= TX_RING_SIZE;
831 lp->dirty_tx -= TX_RING_SIZE;
832 }
833
834 /* Trigger an immediate send poll. */
835 DREG = CSR0_INEA | CSR0_TDMD;
836
837 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
838 TMD1_OWN_HOST)
839 netif_start_queue (dev);
840 else
841 lp->tx_full = 1;
842 spin_unlock_irqrestore (&lp->devlock, flags);
843
844 return NETDEV_TX_OK;
845 }
846
847 /* The LANCE interrupt handler. */
848
849 static irqreturn_t lance_interrupt( int irq, void *dev_id )
850 {
851 struct net_device *dev = dev_id;
852 struct lance_private *lp;
853 struct lance_ioreg *IO;
854 int csr0, boguscnt = 10;
855 int handled = 0;
856
857 if (dev == NULL) {
858 DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
859 return IRQ_NONE;
860 }
861
862 lp = netdev_priv(dev);
863 IO = lp->iobase;
864 spin_lock (&lp->devlock);
865
866 AREG = CSR0;
867
868 while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
869 --boguscnt >= 0) {
870 handled = 1;
871 /* Acknowledge all of the current interrupt sources ASAP. */
872 DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
873 CSR0_TDMD | CSR0_INEA);
874
875 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
876 dev->name, csr0, DREG ));
877
878 if (csr0 & CSR0_RINT) /* Rx interrupt */
879 lance_rx( dev );
880
881 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
882 int dirty_tx = lp->dirty_tx;
883
884 while( dirty_tx < lp->cur_tx) {
885 int entry = dirty_tx & TX_RING_MOD_MASK;
886 int status = MEM->tx_head[entry].flag;
887
888 if (status & TMD1_OWN_CHIP)
889 break; /* It still hasn't been Txed */
890
891 MEM->tx_head[entry].flag = 0;
892
893 if (status & TMD1_ERR) {
894 /* There was an major error, log it. */
895 int err_status = MEM->tx_head[entry].misc;
896 dev->stats.tx_errors++;
897 if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
898 if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
899 if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++;
900 if (err_status & TMD3_UFLO) {
901 /* Ackk! On FIFO errors the Tx unit is turned off! */
902 dev->stats.tx_fifo_errors++;
903 /* Remove this verbosity later! */
904 DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
905 dev->name, csr0 ));
906 /* Restart the chip. */
907 DREG = CSR0_STRT;
908 }
909 } else {
910 if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
911 dev->stats.collisions++;
912 dev->stats.tx_packets++;
913 }
914
915 /* XXX MSch: free skb?? */
916 dirty_tx++;
917 }
918
919 #ifndef final_version
920 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
921 DPRINTK( 0, ( "out-of-sync dirty pointer,"
922 " %d vs. %d, full=%ld.\n",
923 dirty_tx, lp->cur_tx, lp->tx_full ));
924 dirty_tx += TX_RING_SIZE;
925 }
926 #endif
927
928 if (lp->tx_full && (netif_queue_stopped(dev)) &&
929 dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
930 /* The ring is no longer full, clear tbusy. */
931 lp->tx_full = 0;
932 netif_wake_queue (dev);
933 }
934
935 lp->dirty_tx = dirty_tx;
936 }
937
938 /* Log misc errors. */
939 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
940 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
941 if (csr0 & CSR0_MERR) {
942 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
943 "status %04x.\n", dev->name, csr0 ));
944 /* Restart the chip. */
945 DREG = CSR0_STRT;
946 }
947 }
948
949 /* Clear any other interrupt, and set interrupt enable. */
950 DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
951 CSR0_IDON | CSR0_INEA;
952
953 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
954 dev->name, DREG ));
955
956 spin_unlock (&lp->devlock);
957 return IRQ_RETVAL(handled);
958 }
959
960
961 static int lance_rx( struct net_device *dev )
962 {
963 struct lance_private *lp = netdev_priv(dev);
964 int entry = lp->cur_rx & RX_RING_MOD_MASK;
965 int i;
966
967 DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
968 MEM->rx_head[entry].flag ));
969
970 /* If we own the next entry, it's a new packet. Send it up. */
971 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
972 struct lance_rx_head *head = &(MEM->rx_head[entry]);
973 int status = head->flag;
974
975 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
976 /* There is a tricky error noted by John Murphy,
977 <murf@perftech.com> to Russ Nelson: Even with full-sized
978 buffers it's possible for a jabber packet to use two
979 buffers, with only the last correctly noting the error. */
980 if (status & RMD1_ENP) /* Only count a general error at the */
981 dev->stats.rx_errors++; /* end of a packet.*/
982 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
983 if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
984 if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
985 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
986 head->flag &= (RMD1_ENP|RMD1_STP);
987 } else {
988 /* Malloc up new buffer, compatible with net-3. */
989 short pkt_len = head->msg_length & 0xfff;
990 struct sk_buff *skb;
991
992 if (pkt_len < 60) {
993 printk( "%s: Runt packet!\n", dev->name );
994 dev->stats.rx_errors++;
995 }
996 else {
997 skb = netdev_alloc_skb(dev, pkt_len + 2);
998 if (skb == NULL) {
999 for( i = 0; i < RX_RING_SIZE; i++ )
1000 if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
1001 RMD1_OWN_CHIP)
1002 break;
1003
1004 if (i > RX_RING_SIZE - 2) {
1005 dev->stats.rx_dropped++;
1006 head->flag |= RMD1_OWN_CHIP;
1007 lp->cur_rx++;
1008 }
1009 break;
1010 }
1011
1012 if (lance_debug >= 3) {
1013 u_char *data = PKTBUF_ADDR(head);
1014
1015 printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %pM to %pM "
1016 "data %02x %02x %02x %02x %02x %02x %02x %02x "
1017 "len %d\n",
1018 dev->name, ((u_short *)data)[6],
1019 &data[6], data,
1020 data[15], data[16], data[17], data[18],
1021 data[19], data[20], data[21], data[22],
1022 pkt_len);
1023 }
1024
1025 skb_reserve( skb, 2 ); /* 16 byte align */
1026 skb_put( skb, pkt_len ); /* Make room */
1027 lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
1028 skb->protocol = eth_type_trans( skb, dev );
1029 netif_rx( skb );
1030 dev->stats.rx_packets++;
1031 dev->stats.rx_bytes += pkt_len;
1032 }
1033 }
1034
1035 head->flag |= RMD1_OWN_CHIP;
1036 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1037 }
1038 lp->cur_rx &= RX_RING_MOD_MASK;
1039
1040 /* From lance.c (Donald Becker): */
1041 /* We should check that at least two ring entries are free. If not,
1042 we should free one and mark stats->rx_dropped++. */
1043
1044 return 0;
1045 }
1046
1047
1048 static int lance_close( struct net_device *dev )
1049 {
1050 struct lance_private *lp = netdev_priv(dev);
1051 struct lance_ioreg *IO = lp->iobase;
1052
1053 netif_stop_queue (dev);
1054
1055 AREG = CSR0;
1056
1057 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
1058 dev->name, DREG ));
1059
1060 /* We stop the LANCE here -- it occasionally polls
1061 memory if we don't. */
1062 DREG = CSR0_STOP;
1063
1064 return 0;
1065 }
1066
1067
1068 /* Set or clear the multicast filter for this adaptor.
1069 num_addrs == -1 Promiscuous mode, receive all packets
1070 num_addrs == 0 Normal mode, clear multicast list
1071 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1072 best-effort filtering.
1073 */
1074
1075 static void set_multicast_list( struct net_device *dev )
1076 {
1077 struct lance_private *lp = netdev_priv(dev);
1078 struct lance_ioreg *IO = lp->iobase;
1079
1080 if (netif_running(dev))
1081 /* Only possible if board is already started */
1082 return;
1083
1084 /* We take the simple way out and always enable promiscuous mode. */
1085 DREG = CSR0_STOP; /* Temporarily stop the lance. */
1086
1087 if (dev->flags & IFF_PROMISC) {
1088 /* Log any net taps. */
1089 DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name ));
1090 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
1091 } else {
1092 short multicast_table[4];
1093 int num_addrs = netdev_mc_count(dev);
1094 int i;
1095 /* We don't use the multicast table, but rely on upper-layer
1096 * filtering. */
1097 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
1098 sizeof(multicast_table) );
1099 for( i = 0; i < 4; i++ )
1100 REGA( CSR8+i ) = multicast_table[i];
1101 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
1102 }
1103
1104 /*
1105 * Always set BSWP after a STOP as STOP puts it back into
1106 * little endian mode.
1107 */
1108 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
1109
1110 /* Resume normal operation and reset AREG to CSR0 */
1111 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
1112 }
1113
1114
1115 /* This is needed for old RieblCards and possible for new RieblCards */
1116
1117 static int lance_set_mac_address( struct net_device *dev, void *addr )
1118 {
1119 struct lance_private *lp = netdev_priv(dev);
1120 struct sockaddr *saddr = addr;
1121 int i;
1122
1123 if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
1124 return -EOPNOTSUPP;
1125
1126 if (netif_running(dev)) {
1127 /* Only possible while card isn't started */
1128 DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
1129 dev->name ));
1130 return -EIO;
1131 }
1132
1133 memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );
1134 for( i = 0; i < 6; i++ )
1135 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
1136 lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
1137 /* set also the magic for future sessions */
1138 *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
1139
1140 return 0;
1141 }
1142
1143
1144 #ifdef MODULE
1145 static struct net_device *atarilance_dev;
1146
1147 static int __init atarilance_module_init(void)
1148 {
1149 atarilance_dev = atarilance_probe(-1);
1150 return PTR_ERR_OR_ZERO(atarilance_dev);
1151 }
1152
1153 static void __exit atarilance_module_exit(void)
1154 {
1155 unregister_netdev(atarilance_dev);
1156 free_irq(atarilance_dev->irq, atarilance_dev);
1157 free_netdev(atarilance_dev);
1158 }
1159 module_init(atarilance_module_init);
1160 module_exit(atarilance_module_exit);
1161 #endif /* MODULE */
1162
1163
1164 /*
1165 * Local variables:
1166 * c-indent-level: 4
1167 * tab-width: 4
1168 * End:
1169 */
Linux kernel - Deliverables
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