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[S390] bug: use relative pointers in bug table entries
[linux-2.6/linux-2.6-ps3.git] / drivers / net / ariadne.c
blobc35af3e106b1fa38355993c7b53865f488682d52
1 /*
2 * Amiga Linux/m68k Ariadne Ethernet Driver
3 *
4 * © Copyright 1995-2003 by Geert Uytterhoeven (geert@linux-m68k.org)
5 * Peter De Schrijver (p2@mind.be)
6 *
7 * ---------------------------------------------------------------------------
8 *
9 * This program is based on
10 *
11 * lance.c: An AMD LANCE ethernet driver for linux.
12 * Written 1993-94 by Donald Becker.
13 *
14 * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
15 * Advanced Micro Devices
16 * Publication #16907, Rev. B, Amendment/0, May 1994
17 *
18 * MC68230: Parallel Interface/Timer (PI/T)
19 * Motorola Semiconductors, December, 1983
20 *
21 * ---------------------------------------------------------------------------
22 *
23 * This file is subject to the terms and conditions of the GNU General Public
24 * License. See the file COPYING in the main directory of the Linux
25 * distribution for more details.
26 *
27 * ---------------------------------------------------------------------------
28 *
29 * The Ariadne is a Zorro-II board made by Village Tronic. It contains:
30 *
31 * - an Am79C960 PCnet-ISA Single-Chip Ethernet Controller with both
32 * 10BASE-2 (thin coax) and 10BASE-T (UTP) connectors
33 *
34 * - an MC68230 Parallel Interface/Timer configured as 2 parallel ports
35 */
36
37 #include <linux/module.h>
38 #include <linux/stddef.h>
39 #include <linux/kernel.h>
40 #include <linux/string.h>
41 #include <linux/errno.h>
42 #include <linux/ioport.h>
43 #include <linux/slab.h>
44 #include <linux/netdevice.h>
45 #include <linux/etherdevice.h>
46 #include <linux/interrupt.h>
47 #include <linux/skbuff.h>
48 #include <linux/init.h>
49 #include <linux/zorro.h>
50 #include <linux/bitops.h>
51
52 #include <asm/amigaints.h>
53 #include <asm/amigahw.h>
54 #include <asm/irq.h>
55
56 #include "ariadne.h"
57
58
59 #ifdef ARIADNE_DEBUG
60 int ariadne_debug = ARIADNE_DEBUG;
61 #else
62 int ariadne_debug = 1;
63 #endif
64
65
66 /*
67 * Macros to Fix Endianness problems
68 */
69
70 /* Swap the Bytes in a WORD */
71 #define swapw(x) (((x>>8)&0x00ff)|((x<<8)&0xff00))
72 /* Get the Low BYTE in a WORD */
73 #define lowb(x) (x&0xff)
74 /* Get the Swapped High WORD in a LONG */
75 #define swhighw(x) ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff))
76 /* Get the Swapped Low WORD in a LONG */
77 #define swloww(x) ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff))
78
79
80 /*
81 * Transmit/Receive Ring Definitions
82 */
83
84 #define TX_RING_SIZE 5
85 #define RX_RING_SIZE 16
86
87 #define PKT_BUF_SIZE 1520
88
89
90 /*
91 * Private Device Data
92 */
93
94 struct ariadne_private {
95 volatile struct TDRE *tx_ring[TX_RING_SIZE];
96 volatile struct RDRE *rx_ring[RX_RING_SIZE];
97 volatile u_short *tx_buff[TX_RING_SIZE];
98 volatile u_short *rx_buff[RX_RING_SIZE];
99 int cur_tx, cur_rx; /* The next free ring entry */
100 int dirty_tx; /* The ring entries to be free()ed. */
101 char tx_full;
102 };
103
104
105 /*
106 * Structure Created in the Ariadne's RAM Buffer
107 */
108
109 struct lancedata {
110 struct TDRE tx_ring[TX_RING_SIZE];
111 struct RDRE rx_ring[RX_RING_SIZE];
112 u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
113 u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
114 };
115
116 static int ariadne_open(struct net_device *dev);
117 static void ariadne_init_ring(struct net_device *dev);
118 static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb,
119 struct net_device *dev);
120 static void ariadne_tx_timeout(struct net_device *dev);
121 static int ariadne_rx(struct net_device *dev);
122 static void ariadne_reset(struct net_device *dev);
123 static irqreturn_t ariadne_interrupt(int irq, void *data);
124 static int ariadne_close(struct net_device *dev);
125 static struct net_device_stats *ariadne_get_stats(struct net_device *dev);
126 #ifdef HAVE_MULTICAST
127 static void set_multicast_list(struct net_device *dev);
128 #endif
129
130
131 static void memcpyw(volatile u_short *dest, u_short *src, int len)
132 {
133 while (len >= 2) {
134 *(dest++) = *(src++);
135 len -= 2;
136 }
137 if (len == 1)
138 *dest = (*(u_char *)src)<<8;
139 }
140
141
142 static int __devinit ariadne_init_one(struct zorro_dev *z,
143 const struct zorro_device_id *ent);
144 static void __devexit ariadne_remove_one(struct zorro_dev *z);
145
146
147 static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = {
148 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE },
149 { 0 }
150 };
151
152 static struct zorro_driver ariadne_driver = {
153 .name = "ariadne",
154 .id_table = ariadne_zorro_tbl,
155 .probe = ariadne_init_one,
156 .remove = __devexit_p(ariadne_remove_one),
157 };
158
159 static const struct net_device_ops ariadne_netdev_ops = {
160 .ndo_open = ariadne_open,
161 .ndo_stop = ariadne_close,
162 .ndo_start_xmit = ariadne_start_xmit,
163 .ndo_tx_timeout = ariadne_tx_timeout,
164 .ndo_get_stats = ariadne_get_stats,
165 .ndo_set_multicast_list = set_multicast_list,
166 .ndo_validate_addr = eth_validate_addr,
167 .ndo_change_mtu = eth_change_mtu,
168 .ndo_set_mac_address = eth_mac_addr,
169 };
170
171 static int __devinit ariadne_init_one(struct zorro_dev *z,
172 const struct zorro_device_id *ent)
173 {
174 unsigned long board = z->resource.start;
175 unsigned long base_addr = board+ARIADNE_LANCE;
176 unsigned long mem_start = board+ARIADNE_RAM;
177 struct resource *r1, *r2;
178 struct net_device *dev;
179 struct ariadne_private *priv;
180 int err;
181
182 r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960");
183 if (!r1)
184 return -EBUSY;
185 r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM");
186 if (!r2) {
187 release_resource(r1);
188 return -EBUSY;
189 }
190
191 dev = alloc_etherdev(sizeof(struct ariadne_private));
192 if (dev == NULL) {
193 release_resource(r1);
194 release_resource(r2);
195 return -ENOMEM;
196 }
197
198 priv = netdev_priv(dev);
199
200 r1->name = dev->name;
201 r2->name = dev->name;
202
203 dev->dev_addr[0] = 0x00;
204 dev->dev_addr[1] = 0x60;
205 dev->dev_addr[2] = 0x30;
206 dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff;
207 dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff;
208 dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
209 dev->base_addr = ZTWO_VADDR(base_addr);
210 dev->mem_start = ZTWO_VADDR(mem_start);
211 dev->mem_end = dev->mem_start+ARIADNE_RAM_SIZE;
212
213 dev->netdev_ops = &ariadne_netdev_ops;
214 dev->watchdog_timeo = 5*HZ;
215
216 err = register_netdev(dev);
217 if (err) {
218 release_resource(r1);
219 release_resource(r2);
220 free_netdev(dev);
221 return err;
222 }
223 zorro_set_drvdata(z, dev);
224
225 printk(KERN_INFO "%s: Ariadne at 0x%08lx, Ethernet Address %pM\n",
226 dev->name, board, dev->dev_addr);
227
228 return 0;
229 }
230
231
232 static int ariadne_open(struct net_device *dev)
233 {
234 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
235 u_short in;
236 u_long version;
237 int i;
238
239 /* Reset the LANCE */
240 in = lance->Reset;
241
242 /* Stop the LANCE */
243 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
244 lance->RDP = STOP;
245
246 /* Check the LANCE version */
247 lance->RAP = CSR88; /* Chip ID */
248 version = swapw(lance->RDP);
249 lance->RAP = CSR89; /* Chip ID */
250 version |= swapw(lance->RDP)<<16;
251 if ((version & 0x00000fff) != 0x00000003) {
252 printk(KERN_WARNING "ariadne_open: Couldn't find AMD Ethernet Chip\n");
253 return -EAGAIN;
254 }
255 if ((version & 0x0ffff000) != 0x00003000) {
256 printk(KERN_WARNING "ariadne_open: Couldn't find Am79C960 (Wrong part "
257 "number = %ld)\n", (version & 0x0ffff000)>>12);
258 return -EAGAIN;
259 }
260 #if 0
261 printk(KERN_DEBUG "ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n",
262 (version & 0xf0000000)>>28);
263 #endif
264
265 ariadne_init_ring(dev);
266
267 /* Miscellaneous Stuff */
268 lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */
269 lance->RDP = 0x0000;
270 lance->RAP = CSR4; /* Test and Features Control */
271 lance->RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM;
272
273 /* Set the Multicast Table */
274 lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */
275 lance->RDP = 0x0000;
276 lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */
277 lance->RDP = 0x0000;
278 lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */
279 lance->RDP = 0x0000;
280 lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */
281 lance->RDP = 0x0000;
282
283 /* Set the Ethernet Hardware Address */
284 lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */
285 lance->RDP = ((u_short *)&dev->dev_addr[0])[0];
286 lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */
287 lance->RDP = ((u_short *)&dev->dev_addr[0])[1];
288 lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */
289 lance->RDP = ((u_short *)&dev->dev_addr[0])[2];
290
291 /* Set the Init Block Mode */
292 lance->RAP = CSR15; /* Mode Register */
293 lance->RDP = 0x0000;
294
295 /* Set the Transmit Descriptor Ring Pointer */
296 lance->RAP = CSR30; /* Base Address of Transmit Ring */
297 lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
298 lance->RAP = CSR31; /* Base Address of transmit Ring */
299 lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
300
301 /* Set the Receive Descriptor Ring Pointer */
302 lance->RAP = CSR24; /* Base Address of Receive Ring */
303 lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
304 lance->RAP = CSR25; /* Base Address of Receive Ring */
305 lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
306
307 /* Set the Number of RX and TX Ring Entries */
308 lance->RAP = CSR76; /* Receive Ring Length */
309 lance->RDP = swapw(((u_short)-RX_RING_SIZE));
310 lance->RAP = CSR78; /* Transmit Ring Length */
311 lance->RDP = swapw(((u_short)-TX_RING_SIZE));
312
313 /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
314 lance->RAP = ISACSR2; /* Miscellaneous Configuration */
315 lance->IDP = ASEL;
316
317 /* LED Control */
318 lance->RAP = ISACSR5; /* LED1 Status */
319 lance->IDP = PSE|XMTE;
320 lance->RAP = ISACSR6; /* LED2 Status */
321 lance->IDP = PSE|COLE;
322 lance->RAP = ISACSR7; /* LED3 Status */
323 lance->IDP = PSE|RCVE;
324
325 netif_start_queue(dev);
326
327 i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, IRQF_SHARED,
328 dev->name, dev);
329 if (i) return i;
330
331 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
332 lance->RDP = INEA|STRT;
333
334 return 0;
335 }
336
337
338 static void ariadne_init_ring(struct net_device *dev)
339 {
340 struct ariadne_private *priv = netdev_priv(dev);
341 volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start;
342 int i;
343
344 netif_stop_queue(dev);
345
346 priv->tx_full = 0;
347 priv->cur_rx = priv->cur_tx = 0;
348 priv->dirty_tx = 0;
349
350 /* Set up TX Ring */
351 for (i = 0; i < TX_RING_SIZE; i++) {
352 volatile struct TDRE *t = &lancedata->tx_ring[i];
353 t->TMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i]));
354 t->TMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])) |
355 TF_STP | TF_ENP;
356 t->TMD2 = swapw((u_short)-PKT_BUF_SIZE);
357 t->TMD3 = 0;
358 priv->tx_ring[i] = &lancedata->tx_ring[i];
359 priv->tx_buff[i] = lancedata->tx_buff[i];
360 #if 0
361 printk(KERN_DEBUG "TX Entry %2d at %p, Buf at %p\n", i,
362 &lancedata->tx_ring[i], lancedata->tx_buff[i]);
363 #endif
364 }
365
366 /* Set up RX Ring */
367 for (i = 0; i < RX_RING_SIZE; i++) {
368 volatile struct RDRE *r = &lancedata->rx_ring[i];
369 r->RMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i]));
370 r->RMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])) |
371 RF_OWN;
372 r->RMD2 = swapw((u_short)-PKT_BUF_SIZE);
373 r->RMD3 = 0x0000;
374 priv->rx_ring[i] = &lancedata->rx_ring[i];
375 priv->rx_buff[i] = lancedata->rx_buff[i];
376 #if 0
377 printk(KERN_DEBUG "RX Entry %2d at %p, Buf at %p\n", i,
378 &lancedata->rx_ring[i], lancedata->rx_buff[i]);
379 #endif
380 }
381 }
382
383
384 static int ariadne_close(struct net_device *dev)
385 {
386 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
387
388 netif_stop_queue(dev);
389
390 lance->RAP = CSR112; /* Missed Frame Count */
391 dev->stats.rx_missed_errors = swapw(lance->RDP);
392 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
393
394 if (ariadne_debug > 1) {
395 printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
396 dev->name, lance->RDP);
397 printk(KERN_DEBUG "%s: %lu packets missed\n", dev->name,
398 dev->stats.rx_missed_errors);
399 }
400
401 /* We stop the LANCE here -- it occasionally polls memory if we don't. */
402 lance->RDP = STOP;
403
404 free_irq(IRQ_AMIGA_PORTS, dev);
405
406 return 0;
407 }
408
409
410 static inline void ariadne_reset(struct net_device *dev)
411 {
412 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
413
414 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
415 lance->RDP = STOP;
416 ariadne_init_ring(dev);
417 lance->RDP = INEA|STRT;
418 netif_start_queue(dev);
419 }
420
421
422 static irqreturn_t ariadne_interrupt(int irq, void *data)
423 {
424 struct net_device *dev = (struct net_device *)data;
425 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
426 struct ariadne_private *priv;
427 int csr0, boguscnt;
428 int handled = 0;
429
430 if (dev == NULL) {
431 printk(KERN_WARNING "ariadne_interrupt(): irq for unknown device.\n");
432 return IRQ_NONE;
433 }
434
435 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
436
437 if (!(lance->RDP & INTR)) /* Check if any interrupt has been */
438 return IRQ_NONE; /* generated by the board. */
439
440 priv = netdev_priv(dev);
441
442 boguscnt = 10;
443 while ((csr0 = lance->RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) {
444 /* Acknowledge all of the current interrupt sources ASAP. */
445 lance->RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT);
446
447 #if 0
448 if (ariadne_debug > 5) {
449 printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.",
450 dev->name, csr0, lance->RDP);
451 printk("[");
452 if (csr0 & INTR)
453 printk(" INTR");
454 if (csr0 & INEA)
455 printk(" INEA");
456 if (csr0 & RXON)
457 printk(" RXON");
458 if (csr0 & TXON)
459 printk(" TXON");
460 if (csr0 & TDMD)
461 printk(" TDMD");
462 if (csr0 & STOP)
463 printk(" STOP");
464 if (csr0 & STRT)
465 printk(" STRT");
466 if (csr0 & INIT)
467 printk(" INIT");
468 if (csr0 & ERR)
469 printk(" ERR");
470 if (csr0 & BABL)
471 printk(" BABL");
472 if (csr0 & CERR)
473 printk(" CERR");
474 if (csr0 & MISS)
475 printk(" MISS");
476 if (csr0 & MERR)
477 printk(" MERR");
478 if (csr0 & RINT)
479 printk(" RINT");
480 if (csr0 & TINT)
481 printk(" TINT");
482 if (csr0 & IDON)
483 printk(" IDON");
484 printk(" ]\n");
485 }
486 #endif
487
488 if (csr0 & RINT) { /* Rx interrupt */
489 handled = 1;
490 ariadne_rx(dev);
491 }
492
493 if (csr0 & TINT) { /* Tx-done interrupt */
494 int dirty_tx = priv->dirty_tx;
495
496 handled = 1;
497 while (dirty_tx < priv->cur_tx) {
498 int entry = dirty_tx % TX_RING_SIZE;
499 int status = lowb(priv->tx_ring[entry]->TMD1);
500
501 if (status & TF_OWN)
502 break; /* It still hasn't been Txed */
503
504 priv->tx_ring[entry]->TMD1 &= 0xff00;
505
506 if (status & TF_ERR) {
507 /* There was an major error, log it. */
508 int err_status = priv->tx_ring[entry]->TMD3;
509 dev->stats.tx_errors++;
510 if (err_status & EF_RTRY)
511 dev->stats.tx_aborted_errors++;
512 if (err_status & EF_LCAR)
513 dev->stats.tx_carrier_errors++;
514 if (err_status & EF_LCOL)
515 dev->stats.tx_window_errors++;
516 if (err_status & EF_UFLO) {
517 /* Ackk! On FIFO errors the Tx unit is turned off! */
518 dev->stats.tx_fifo_errors++;
519 /* Remove this verbosity later! */
520 printk(KERN_ERR "%s: Tx FIFO error! Status %4.4x.\n",
521 dev->name, csr0);
522 /* Restart the chip. */
523 lance->RDP = STRT;
524 }
525 } else {
526 if (status & (TF_MORE|TF_ONE))
527 dev->stats.collisions++;
528 dev->stats.tx_packets++;
529 }
530 dirty_tx++;
531 }
532
533 #ifndef final_version
534 if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
535 printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, "
536 "full=%d.\n", dirty_tx, priv->cur_tx, priv->tx_full);
537 dirty_tx += TX_RING_SIZE;
538 }
539 #endif
540
541 if (priv->tx_full && netif_queue_stopped(dev) &&
542 dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
543 /* The ring is no longer full. */
544 priv->tx_full = 0;
545 netif_wake_queue(dev);
546 }
547
548 priv->dirty_tx = dirty_tx;
549 }
550
551 /* Log misc errors. */
552 if (csr0 & BABL) {
553 handled = 1;
554 dev->stats.tx_errors++; /* Tx babble. */
555 }
556 if (csr0 & MISS) {
557 handled = 1;
558 dev->stats.rx_errors++; /* Missed a Rx frame. */
559 }
560 if (csr0 & MERR) {
561 handled = 1;
562 printk(KERN_ERR "%s: Bus master arbitration failure, status "
563 "%4.4x.\n", dev->name, csr0);
564 /* Restart the chip. */
565 lance->RDP = STRT;
566 }
567 }
568
569 /* Clear any other interrupt, and set interrupt enable. */
570 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
571 lance->RDP = INEA|BABL|CERR|MISS|MERR|IDON;
572
573 #if 0
574 if (ariadne_debug > 4)
575 printk(KERN_DEBUG "%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name,
576 lance->RAP, lance->RDP);
577 #endif
578 return IRQ_RETVAL(handled);
579 }
580
581
582 static void ariadne_tx_timeout(struct net_device *dev)
583 {
584 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
585
586 printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n",
587 dev->name, lance->RDP);
588 ariadne_reset(dev);
589 netif_wake_queue(dev);
590 }
591
592
593 static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb,
594 struct net_device *dev)
595 {
596 struct ariadne_private *priv = netdev_priv(dev);
597 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
598 int entry;
599 unsigned long flags;
600 int len = skb->len;
601
602 #if 0
603 if (ariadne_debug > 3) {
604 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
605 printk(KERN_DEBUG "%s: ariadne_start_xmit() called, csr0 %4.4x.\n",
606 dev->name, lance->RDP);
607 lance->RDP = 0x0000;
608 }
609 #endif
610
611 /* FIXME: is the 79C960 new enough to do its own padding right ? */
612 if (skb->len < ETH_ZLEN)
613 {
614 if (skb_padto(skb, ETH_ZLEN))
615 return NETDEV_TX_OK;
616 len = ETH_ZLEN;
617 }
618
619 /* Fill in a Tx ring entry */
620
621 #if 0
622 {
623 printk(KERN_DEBUG "TX pkt type 0x%04x from %pM to %pM "
624 " data 0x%08x len %d\n",
625 ((u_short *)skb->data)[6],
626 skb->data + 6, skb->data,
627 (int)skb->data, (int)skb->len);
628 }
629 #endif
630
631 local_irq_save(flags);
632
633 entry = priv->cur_tx % TX_RING_SIZE;
634
635 /* Caution: the write order is important here, set the base address with
636 the "ownership" bits last. */
637
638 priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
639 priv->tx_ring[entry]->TMD3 = 0x0000;
640 memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len);
641
642 #if 0
643 {
644 int i, len;
645
646 len = skb->len > 64 ? 64 : skb->len;
647 len >>= 1;
648 for (i = 0; i < len; i += 8) {
649 int j;
650 printk(KERN_DEBUG "%04x:", i);
651 for (j = 0; (j < 8) && ((i+j) < len); j++) {
652 if (!(j & 1))
653 printk(" ");
654 printk("%04x", priv->tx_buff[entry][i+j]);
655 }
656 printk("\n");
657 }
658 }
659 #endif
660
661 priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP;
662
663 dev_kfree_skb(skb);
664
665 priv->cur_tx++;
666 if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) {
667
668 #if 0
669 printk(KERN_DEBUG "*** Subtracting TX_RING_SIZE from cur_tx (%d) and "
670 "dirty_tx (%d)\n", priv->cur_tx, priv->dirty_tx);
671 #endif
672
673 priv->cur_tx -= TX_RING_SIZE;
674 priv->dirty_tx -= TX_RING_SIZE;
675 }
676 dev->stats.tx_bytes += len;
677
678 /* Trigger an immediate send poll. */
679 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
680 lance->RDP = INEA|TDMD;
681
682 dev->trans_start = jiffies;
683
684 if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) != 0) {
685 netif_stop_queue(dev);
686 priv->tx_full = 1;
687 }
688 local_irq_restore(flags);
689
690 return NETDEV_TX_OK;
691 }
692
693
694 static int ariadne_rx(struct net_device *dev)
695 {
696 struct ariadne_private *priv = netdev_priv(dev);
697 int entry = priv->cur_rx % RX_RING_SIZE;
698 int i;
699
700 /* If we own the next entry, it's a new packet. Send it up. */
701 while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
702 int status = lowb(priv->rx_ring[entry]->RMD1);
703
704 if (status != (RF_STP|RF_ENP)) { /* There was an error. */
705 /* There is a tricky error noted by John Murphy,
706 <murf@perftech.com> to Russ Nelson: Even with full-sized
707 buffers it's possible for a jabber packet to use two
708 buffers, with only the last correctly noting the error. */
709 if (status & RF_ENP)
710 /* Only count a general error at the end of a packet.*/
711 dev->stats.rx_errors++;
712 if (status & RF_FRAM)
713 dev->stats.rx_frame_errors++;
714 if (status & RF_OFLO)
715 dev->stats.rx_over_errors++;
716 if (status & RF_CRC)
717 dev->stats.rx_crc_errors++;
718 if (status & RF_BUFF)
719 dev->stats.rx_fifo_errors++;
720 priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP;
721 } else {
722 /* Malloc up new buffer, compatible with net-3. */
723 short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
724 struct sk_buff *skb;
725
726 skb = dev_alloc_skb(pkt_len+2);
727 if (skb == NULL) {
728 printk(KERN_WARNING "%s: Memory squeeze, deferring packet.\n",
729 dev->name);
730 for (i = 0; i < RX_RING_SIZE; i++)
731 if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN)
732 break;
733
734 if (i > RX_RING_SIZE-2) {
735 dev->stats.rx_dropped++;
736 priv->rx_ring[entry]->RMD1 |= RF_OWN;
737 priv->cur_rx++;
738 }
739 break;
740 }
741
742
743 skb_reserve(skb,2); /* 16 byte align */
744 skb_put(skb,pkt_len); /* Make room */
745 skb_copy_to_linear_data(skb, (char *)priv->rx_buff[entry], pkt_len);
746 skb->protocol=eth_type_trans(skb,dev);
747 #if 0
748 {
749 printk(KERN_DEBUG "RX pkt type 0x%04x from ",
750 ((u_short *)skb->data)[6]);
751 {
752 u_char *ptr = &((u_char *)skb->data)[6];
753 printk("%pM", ptr);
754 }
755 printk(" to ");
756 {
757 u_char *ptr = (u_char *)skb->data;
758 printk("%pM", ptr);
759 }
760 printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
761 }
762 #endif
763
764 netif_rx(skb);
765 dev->stats.rx_packets++;
766 dev->stats.rx_bytes += pkt_len;
767 }
768
769 priv->rx_ring[entry]->RMD1 |= RF_OWN;
770 entry = (++priv->cur_rx) % RX_RING_SIZE;
771 }
772
773 priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
774
775 /* We should check that at least two ring entries are free. If not,
776 we should free one and mark stats->rx_dropped++. */
777
778 return 0;
779 }
780
781
782 static struct net_device_stats *ariadne_get_stats(struct net_device *dev)
783 {
784 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
785 short saved_addr;
786 unsigned long flags;
787
788 local_irq_save(flags);
789 saved_addr = lance->RAP;
790 lance->RAP = CSR112; /* Missed Frame Count */
791 dev->stats.rx_missed_errors = swapw(lance->RDP);
792 lance->RAP = saved_addr;
793 local_irq_restore(flags);
794
795 return &dev->stats;
796 }
797
798
799 /* Set or clear the multicast filter for this adaptor.
800 num_addrs == -1 Promiscuous mode, receive all packets
801 num_addrs == 0 Normal mode, clear multicast list
802 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
803 best-effort filtering.
804 */
805 static void set_multicast_list(struct net_device *dev)
806 {
807 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
808
809 if (!netif_running(dev))
810 return;
811
812 netif_stop_queue(dev);
813
814 /* We take the simple way out and always enable promiscuous mode. */
815 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
816 lance->RDP = STOP; /* Temporarily stop the lance. */
817 ariadne_init_ring(dev);
818
819 if (dev->flags & IFF_PROMISC) {
820 lance->RAP = CSR15; /* Mode Register */
821 lance->RDP = PROM; /* Set promiscuous mode */
822 } else {
823 short multicast_table[4];
824 int num_addrs = dev->mc_count;
825 int i;
826 /* We don't use the multicast table, but rely on upper-layer filtering. */
827 memset(multicast_table, (num_addrs == 0) ? 0 : -1,
828 sizeof(multicast_table));
829 for (i = 0; i < 4; i++) {
830 lance->RAP = CSR8+(i<<8); /* Logical Address Filter */
831 lance->RDP = swapw(multicast_table[i]);
832 }
833 lance->RAP = CSR15; /* Mode Register */
834 lance->RDP = 0x0000; /* Unset promiscuous mode */
835 }
836
837 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
838 lance->RDP = INEA|STRT|IDON; /* Resume normal operation. */
839
840 netif_wake_queue(dev);
841 }
842
843
844 static void __devexit ariadne_remove_one(struct zorro_dev *z)
845 {
846 struct net_device *dev = zorro_get_drvdata(z);
847
848 unregister_netdev(dev);
849 release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960));
850 release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE);
851 free_netdev(dev);
852 }
853
854 static int __init ariadne_init_module(void)
855 {
856 return zorro_register_driver(&ariadne_driver);
857 }
858
859 static void __exit ariadne_cleanup_module(void)
860 {
861 zorro_unregister_driver(&ariadne_driver);
862 }
863
864 module_init(ariadne_init_module);
865 module_exit(ariadne_cleanup_module);
866
867 MODULE_LICENSE("GPL");
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