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Merge branch 'akpm'
[linux-2.6/next.git] / drivers / net / ariadne.c
blob7ed78f4020428dd203233c3ba1f95a8f43de04a0
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38 /*#define DEBUG*/
39
40 #include <linux/module.h>
41 #include <linux/stddef.h>
42 #include <linux/kernel.h>
43 #include <linux/string.h>
44 #include <linux/errno.h>
45 #include <linux/ioport.h>
46 #include <linux/netdevice.h>
47 #include <linux/etherdevice.h>
48 #include <linux/interrupt.h>
49 #include <linux/skbuff.h>
50 #include <linux/init.h>
51 #include <linux/zorro.h>
52 #include <linux/bitops.h>
53
54 #include <asm/amigaints.h>
55 #include <asm/amigahw.h>
56 #include <asm/irq.h>
57
58 #include "ariadne.h"
59
60 #ifdef ARIADNE_DEBUG
61 int ariadne_debug = ARIADNE_DEBUG;
62 #else
63 int ariadne_debug = 1;
64 #endif
65
66 /* Macros to Fix Endianness problems */
67
68 /* Swap the Bytes in a WORD */
69 #define swapw(x) (((x >> 8) & 0x00ff) | ((x << 8) & 0xff00))
70 /* Get the Low BYTE in a WORD */
71 #define lowb(x) (x & 0xff)
72 /* Get the Swapped High WORD in a LONG */
73 #define swhighw(x) ((((x) >> 8) & 0xff00) | (((x) >> 24) & 0x00ff))
74 /* Get the Swapped Low WORD in a LONG */
75 #define swloww(x) ((((x) << 8) & 0xff00) | (((x) >> 8) & 0x00ff))
76
77 /* Transmit/Receive Ring Definitions */
78
79 #define TX_RING_SIZE 5
80 #define RX_RING_SIZE 16
81
82 #define PKT_BUF_SIZE 1520
83
84 /* Private Device Data */
85
86 struct ariadne_private {
87 volatile struct TDRE *tx_ring[TX_RING_SIZE];
88 volatile struct RDRE *rx_ring[RX_RING_SIZE];
89 volatile u_short *tx_buff[TX_RING_SIZE];
90 volatile u_short *rx_buff[RX_RING_SIZE];
91 int cur_tx, cur_rx; /* The next free ring entry */
92 int dirty_tx; /* The ring entries to be free()ed */
93 char tx_full;
94 };
95
96 /* Structure Created in the Ariadne's RAM Buffer */
97
98 struct lancedata {
99 struct TDRE tx_ring[TX_RING_SIZE];
100 struct RDRE rx_ring[RX_RING_SIZE];
101 u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE / sizeof(u_short)];
102 u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE / sizeof(u_short)];
103 };
104
105 static void memcpyw(volatile u_short *dest, u_short *src, int len)
106 {
107 while (len >= 2) {
108 *(dest++) = *(src++);
109 len -= 2;
110 }
111 if (len == 1)
112 *dest = (*(u_char *)src) << 8;
113 }
114
115 static void ariadne_init_ring(struct net_device *dev)
116 {
117 struct ariadne_private *priv = netdev_priv(dev);
118 volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start;
119 int i;
120
121 netif_stop_queue(dev);
122
123 priv->tx_full = 0;
124 priv->cur_rx = priv->cur_tx = 0;
125 priv->dirty_tx = 0;
126
127 /* Set up TX Ring */
128 for (i = 0; i < TX_RING_SIZE; i++) {
129 volatile struct TDRE *t = &lancedata->tx_ring[i];
130 t->TMD0 = swloww(ARIADNE_RAM +
131 offsetof(struct lancedata, tx_buff[i]));
132 t->TMD1 = swhighw(ARIADNE_RAM +
133 offsetof(struct lancedata, tx_buff[i])) |
134 TF_STP | TF_ENP;
135 t->TMD2 = swapw((u_short)-PKT_BUF_SIZE);
136 t->TMD3 = 0;
137 priv->tx_ring[i] = &lancedata->tx_ring[i];
138 priv->tx_buff[i] = lancedata->tx_buff[i];
139 netdev_dbg(dev, "TX Entry %2d at %p, Buf at %p\n",
140 i, &lancedata->tx_ring[i], lancedata->tx_buff[i]);
141 }
142
143 /* Set up RX Ring */
144 for (i = 0; i < RX_RING_SIZE; i++) {
145 volatile struct RDRE *r = &lancedata->rx_ring[i];
146 r->RMD0 = swloww(ARIADNE_RAM +
147 offsetof(struct lancedata, rx_buff[i]));
148 r->RMD1 = swhighw(ARIADNE_RAM +
149 offsetof(struct lancedata, rx_buff[i])) |
150 RF_OWN;
151 r->RMD2 = swapw((u_short)-PKT_BUF_SIZE);
152 r->RMD3 = 0x0000;
153 priv->rx_ring[i] = &lancedata->rx_ring[i];
154 priv->rx_buff[i] = lancedata->rx_buff[i];
155 netdev_dbg(dev, "RX Entry %2d at %p, Buf at %p\n",
156 i, &lancedata->rx_ring[i], lancedata->rx_buff[i]);
157 }
158 }
159
160 static int ariadne_rx(struct net_device *dev)
161 {
162 struct ariadne_private *priv = netdev_priv(dev);
163 int entry = priv->cur_rx % RX_RING_SIZE;
164 int i;
165
166 /* If we own the next entry, it's a new packet. Send it up */
167 while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
168 int status = lowb(priv->rx_ring[entry]->RMD1);
169
170 if (status != (RF_STP | RF_ENP)) { /* There was an error */
171 /* There is a tricky error noted by
172 * John Murphy <murf@perftech.com> to Russ Nelson:
173 * Even with full-sized buffers it's possible for a
174 * jabber packet to use two buffers, with only the
175 * last correctly noting the error
176 */
177 /* Only count a general error at the end of a packet */
178 if (status & RF_ENP)
179 dev->stats.rx_errors++;
180 if (status & RF_FRAM)
181 dev->stats.rx_frame_errors++;
182 if (status & RF_OFLO)
183 dev->stats.rx_over_errors++;
184 if (status & RF_CRC)
185 dev->stats.rx_crc_errors++;
186 if (status & RF_BUFF)
187 dev->stats.rx_fifo_errors++;
188 priv->rx_ring[entry]->RMD1 &= 0xff00 | RF_STP | RF_ENP;
189 } else {
190 /* Malloc up new buffer, compatible with net-3 */
191 short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
192 struct sk_buff *skb;
193
194 skb = dev_alloc_skb(pkt_len + 2);
195 if (skb == NULL) {
196 netdev_warn(dev, "Memory squeeze, deferring packet\n");
197 for (i = 0; i < RX_RING_SIZE; i++)
198 if (lowb(priv->rx_ring[(entry + i) % RX_RING_SIZE]->RMD1) & RF_OWN)
199 break;
200
201 if (i > RX_RING_SIZE - 2) {
202 dev->stats.rx_dropped++;
203 priv->rx_ring[entry]->RMD1 |= RF_OWN;
204 priv->cur_rx++;
205 }
206 break;
207 }
208
209
210 skb_reserve(skb, 2); /* 16 byte align */
211 skb_put(skb, pkt_len); /* Make room */
212 skb_copy_to_linear_data(skb,
213 (const void *)priv->rx_buff[entry],
214 pkt_len);
215 skb->protocol = eth_type_trans(skb, dev);
216 netdev_dbg(dev, "RX pkt type 0x%04x from %pM to %pM data 0x%08x len %d\n",
217 ((u_short *)skb->data)[6],
218 skb->data + 6, skb->data,
219 (int)skb->data, (int)skb->len);
220
221 netif_rx(skb);
222 dev->stats.rx_packets++;
223 dev->stats.rx_bytes += pkt_len;
224 }
225
226 priv->rx_ring[entry]->RMD1 |= RF_OWN;
227 entry = (++priv->cur_rx) % RX_RING_SIZE;
228 }
229
230 priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
231
232 /* We should check that at least two ring entries are free.
233 * If not, we should free one and mark stats->rx_dropped++
234 */
235
236 return 0;
237 }
238
239 static irqreturn_t ariadne_interrupt(int irq, void *data)
240 {
241 struct net_device *dev = (struct net_device *)data;
242 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
243 struct ariadne_private *priv;
244 int csr0, boguscnt;
245 int handled = 0;
246
247 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
248
249 if (!(lance->RDP & INTR)) /* Check if any interrupt has been */
250 return IRQ_NONE; /* generated by the board */
251
252 priv = netdev_priv(dev);
253
254 boguscnt = 10;
255 while ((csr0 = lance->RDP) & (ERR | RINT | TINT) && --boguscnt >= 0) {
256 /* Acknowledge all of the current interrupt sources ASAP */
257 lance->RDP = csr0 & ~(INEA | TDMD | STOP | STRT | INIT);
258
259 #ifdef DEBUG
260 if (ariadne_debug > 5) {
261 netdev_dbg(dev, "interrupt csr0=%#02x new csr=%#02x [",
262 csr0, lance->RDP);
263 if (csr0 & INTR)
264 pr_cont(" INTR");
265 if (csr0 & INEA)
266 pr_cont(" INEA");
267 if (csr0 & RXON)
268 pr_cont(" RXON");
269 if (csr0 & TXON)
270 pr_cont(" TXON");
271 if (csr0 & TDMD)
272 pr_cont(" TDMD");
273 if (csr0 & STOP)
274 pr_cont(" STOP");
275 if (csr0 & STRT)
276 pr_cont(" STRT");
277 if (csr0 & INIT)
278 pr_cont(" INIT");
279 if (csr0 & ERR)
280 pr_cont(" ERR");
281 if (csr0 & BABL)
282 pr_cont(" BABL");
283 if (csr0 & CERR)
284 pr_cont(" CERR");
285 if (csr0 & MISS)
286 pr_cont(" MISS");
287 if (csr0 & MERR)
288 pr_cont(" MERR");
289 if (csr0 & RINT)
290 pr_cont(" RINT");
291 if (csr0 & TINT)
292 pr_cont(" TINT");
293 if (csr0 & IDON)
294 pr_cont(" IDON");
295 pr_cont(" ]\n");
296 }
297 #endif
298
299 if (csr0 & RINT) { /* Rx interrupt */
300 handled = 1;
301 ariadne_rx(dev);
302 }
303
304 if (csr0 & TINT) { /* Tx-done interrupt */
305 int dirty_tx = priv->dirty_tx;
306
307 handled = 1;
308 while (dirty_tx < priv->cur_tx) {
309 int entry = dirty_tx % TX_RING_SIZE;
310 int status = lowb(priv->tx_ring[entry]->TMD1);
311
312 if (status & TF_OWN)
313 break; /* It still hasn't been Txed */
314
315 priv->tx_ring[entry]->TMD1 &= 0xff00;
316
317 if (status & TF_ERR) {
318 /* There was an major error, log it */
319 int err_status = priv->tx_ring[entry]->TMD3;
320 dev->stats.tx_errors++;
321 if (err_status & EF_RTRY)
322 dev->stats.tx_aborted_errors++;
323 if (err_status & EF_LCAR)
324 dev->stats.tx_carrier_errors++;
325 if (err_status & EF_LCOL)
326 dev->stats.tx_window_errors++;
327 if (err_status & EF_UFLO) {
328 /* Ackk! On FIFO errors the Tx unit is turned off! */
329 dev->stats.tx_fifo_errors++;
330 /* Remove this verbosity later! */
331 netdev_err(dev, "Tx FIFO error! Status %04x\n",
332 csr0);
333 /* Restart the chip */
334 lance->RDP = STRT;
335 }
336 } else {
337 if (status & (TF_MORE | TF_ONE))
338 dev->stats.collisions++;
339 dev->stats.tx_packets++;
340 }
341 dirty_tx++;
342 }
343
344 #ifndef final_version
345 if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
346 netdev_err(dev, "out-of-sync dirty pointer, %d vs. %d, full=%d\n",
347 dirty_tx, priv->cur_tx,
348 priv->tx_full);
349 dirty_tx += TX_RING_SIZE;
350 }
351 #endif
352
353 if (priv->tx_full && netif_queue_stopped(dev) &&
354 dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
355 /* The ring is no longer full */
356 priv->tx_full = 0;
357 netif_wake_queue(dev);
358 }
359
360 priv->dirty_tx = dirty_tx;
361 }
362
363 /* Log misc errors */
364 if (csr0 & BABL) {
365 handled = 1;
366 dev->stats.tx_errors++; /* Tx babble */
367 }
368 if (csr0 & MISS) {
369 handled = 1;
370 dev->stats.rx_errors++; /* Missed a Rx frame */
371 }
372 if (csr0 & MERR) {
373 handled = 1;
374 netdev_err(dev, "Bus master arbitration failure, status %04x\n",
375 csr0);
376 /* Restart the chip */
377 lance->RDP = STRT;
378 }
379 }
380
381 /* Clear any other interrupt, and set interrupt enable */
382 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
383 lance->RDP = INEA | BABL | CERR | MISS | MERR | IDON;
384
385 if (ariadne_debug > 4)
386 netdev_dbg(dev, "exiting interrupt, csr%d=%#04x\n",
387 lance->RAP, lance->RDP);
388
389 return IRQ_RETVAL(handled);
390 }
391
392 static int ariadne_open(struct net_device *dev)
393 {
394 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
395 u_short in;
396 u_long version;
397 int i;
398
399 /* Reset the LANCE */
400 in = lance->Reset;
401
402 /* Stop the LANCE */
403 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
404 lance->RDP = STOP;
405
406 /* Check the LANCE version */
407 lance->RAP = CSR88; /* Chip ID */
408 version = swapw(lance->RDP);
409 lance->RAP = CSR89; /* Chip ID */
410 version |= swapw(lance->RDP) << 16;
411 if ((version & 0x00000fff) != 0x00000003) {
412 pr_warn("Couldn't find AMD Ethernet Chip\n");
413 return -EAGAIN;
414 }
415 if ((version & 0x0ffff000) != 0x00003000) {
416 pr_warn("Couldn't find Am79C960 (Wrong part number = %ld)\n",
417 (version & 0x0ffff000) >> 12);
418 return -EAGAIN;
419 }
420
421 netdev_dbg(dev, "Am79C960 (PCnet-ISA) Revision %ld\n",
422 (version & 0xf0000000) >> 28);
423
424 ariadne_init_ring(dev);
425
426 /* Miscellaneous Stuff */
427 lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */
428 lance->RDP = 0x0000;
429 lance->RAP = CSR4; /* Test and Features Control */
430 lance->RDP = DPOLL | APAD_XMT | MFCOM | RCVCCOM | TXSTRTM | JABM;
431
432 /* Set the Multicast Table */
433 lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */
434 lance->RDP = 0x0000;
435 lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */
436 lance->RDP = 0x0000;
437 lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */
438 lance->RDP = 0x0000;
439 lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */
440 lance->RDP = 0x0000;
441
442 /* Set the Ethernet Hardware Address */
443 lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */
444 lance->RDP = ((u_short *)&dev->dev_addr[0])[0];
445 lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */
446 lance->RDP = ((u_short *)&dev->dev_addr[0])[1];
447 lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */
448 lance->RDP = ((u_short *)&dev->dev_addr[0])[2];
449
450 /* Set the Init Block Mode */
451 lance->RAP = CSR15; /* Mode Register */
452 lance->RDP = 0x0000;
453
454 /* Set the Transmit Descriptor Ring Pointer */
455 lance->RAP = CSR30; /* Base Address of Transmit Ring */
456 lance->RDP = swloww(ARIADNE_RAM + offsetof(struct lancedata, tx_ring));
457 lance->RAP = CSR31; /* Base Address of transmit Ring */
458 lance->RDP = swhighw(ARIADNE_RAM + offsetof(struct lancedata, tx_ring));
459
460 /* Set the Receive Descriptor Ring Pointer */
461 lance->RAP = CSR24; /* Base Address of Receive Ring */
462 lance->RDP = swloww(ARIADNE_RAM + offsetof(struct lancedata, rx_ring));
463 lance->RAP = CSR25; /* Base Address of Receive Ring */
464 lance->RDP = swhighw(ARIADNE_RAM + offsetof(struct lancedata, rx_ring));
465
466 /* Set the Number of RX and TX Ring Entries */
467 lance->RAP = CSR76; /* Receive Ring Length */
468 lance->RDP = swapw(((u_short)-RX_RING_SIZE));
469 lance->RAP = CSR78; /* Transmit Ring Length */
470 lance->RDP = swapw(((u_short)-TX_RING_SIZE));
471
472 /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
473 lance->RAP = ISACSR2; /* Miscellaneous Configuration */
474 lance->IDP = ASEL;
475
476 /* LED Control */
477 lance->RAP = ISACSR5; /* LED1 Status */
478 lance->IDP = PSE|XMTE;
479 lance->RAP = ISACSR6; /* LED2 Status */
480 lance->IDP = PSE|COLE;
481 lance->RAP = ISACSR7; /* LED3 Status */
482 lance->IDP = PSE|RCVE;
483
484 netif_start_queue(dev);
485
486 i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, IRQF_SHARED,
487 dev->name, dev);
488 if (i)
489 return i;
490
491 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
492 lance->RDP = INEA | STRT;
493
494 return 0;
495 }
496
497 static int ariadne_close(struct net_device *dev)
498 {
499 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
500
501 netif_stop_queue(dev);
502
503 lance->RAP = CSR112; /* Missed Frame Count */
504 dev->stats.rx_missed_errors = swapw(lance->RDP);
505 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
506
507 if (ariadne_debug > 1) {
508 netdev_dbg(dev, "Shutting down ethercard, status was %02x\n",
509 lance->RDP);
510 netdev_dbg(dev, "%lu packets missed\n",
511 dev->stats.rx_missed_errors);
512 }
513
514 /* We stop the LANCE here -- it occasionally polls memory if we don't */
515 lance->RDP = STOP;
516
517 free_irq(IRQ_AMIGA_PORTS, dev);
518
519 return 0;
520 }
521
522 static inline void ariadne_reset(struct net_device *dev)
523 {
524 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
525
526 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
527 lance->RDP = STOP;
528 ariadne_init_ring(dev);
529 lance->RDP = INEA | STRT;
530 netif_start_queue(dev);
531 }
532
533 static void ariadne_tx_timeout(struct net_device *dev)
534 {
535 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
536
537 netdev_err(dev, "transmit timed out, status %04x, resetting\n",
538 lance->RDP);
539 ariadne_reset(dev);
540 netif_wake_queue(dev);
541 }
542
543 static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb,
544 struct net_device *dev)
545 {
546 struct ariadne_private *priv = netdev_priv(dev);
547 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
548 int entry;
549 unsigned long flags;
550 int len = skb->len;
551
552 #if 0
553 if (ariadne_debug > 3) {
554 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
555 netdev_dbg(dev, "%s: csr0 %04x\n", __func__, lance->RDP);
556 lance->RDP = 0x0000;
557 }
558 #endif
559
560 /* FIXME: is the 79C960 new enough to do its own padding right ? */
561 if (skb->len < ETH_ZLEN) {
562 if (skb_padto(skb, ETH_ZLEN))
563 return NETDEV_TX_OK;
564 len = ETH_ZLEN;
565 }
566
567 /* Fill in a Tx ring entry */
568
569 netdev_dbg(dev, "TX pkt type 0x%04x from %pM to %pM data 0x%08x len %d\n",
570 ((u_short *)skb->data)[6],
571 skb->data + 6, skb->data,
572 (int)skb->data, (int)skb->len);
573
574 local_irq_save(flags);
575
576 entry = priv->cur_tx % TX_RING_SIZE;
577
578 /* Caution: the write order is important here, set the base address with
579 the "ownership" bits last */
580
581 priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
582 priv->tx_ring[entry]->TMD3 = 0x0000;
583 memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len);
584
585 #ifdef DEBUG
586 print_hex_dump(KERN_DEBUG, "tx_buff: ", DUMP_PREFIX_OFFSET, 16, 1,
587 (void *)priv->tx_buff[entry],
588 skb->len > 64 ? 64 : skb->len, true);
589 #endif
590
591 priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1 & 0xff00)
592 | TF_OWN | TF_STP | TF_ENP;
593
594 dev_kfree_skb(skb);
595
596 priv->cur_tx++;
597 if ((priv->cur_tx >= TX_RING_SIZE) &&
598 (priv->dirty_tx >= TX_RING_SIZE)) {
599
600 netdev_dbg(dev, "*** Subtracting TX_RING_SIZE from cur_tx (%d) and dirty_tx (%d)\n",
601 priv->cur_tx, priv->dirty_tx);
602
603 priv->cur_tx -= TX_RING_SIZE;
604 priv->dirty_tx -= TX_RING_SIZE;
605 }
606 dev->stats.tx_bytes += len;
607
608 /* Trigger an immediate send poll */
609 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
610 lance->RDP = INEA | TDMD;
611
612 if (lowb(priv->tx_ring[(entry + 1) % TX_RING_SIZE]->TMD1) != 0) {
613 netif_stop_queue(dev);
614 priv->tx_full = 1;
615 }
616 local_irq_restore(flags);
617
618 return NETDEV_TX_OK;
619 }
620
621 static struct net_device_stats *ariadne_get_stats(struct net_device *dev)
622 {
623 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
624 short saved_addr;
625 unsigned long flags;
626
627 local_irq_save(flags);
628 saved_addr = lance->RAP;
629 lance->RAP = CSR112; /* Missed Frame Count */
630 dev->stats.rx_missed_errors = swapw(lance->RDP);
631 lance->RAP = saved_addr;
632 local_irq_restore(flags);
633
634 return &dev->stats;
635 }
636
637 /* Set or clear the multicast filter for this adaptor.
638 * num_addrs == -1 Promiscuous mode, receive all packets
639 * num_addrs == 0 Normal mode, clear multicast list
640 * num_addrs > 0 Multicast mode, receive normal and MC packets,
641 * and do best-effort filtering.
642 */
643 static void set_multicast_list(struct net_device *dev)
644 {
645 volatile struct Am79C960 *lance = (struct Am79C960 *)dev->base_addr;
646
647 if (!netif_running(dev))
648 return;
649
650 netif_stop_queue(dev);
651
652 /* We take the simple way out and always enable promiscuous mode */
653 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
654 lance->RDP = STOP; /* Temporarily stop the lance */
655 ariadne_init_ring(dev);
656
657 if (dev->flags & IFF_PROMISC) {
658 lance->RAP = CSR15; /* Mode Register */
659 lance->RDP = PROM; /* Set promiscuous mode */
660 } else {
661 short multicast_table[4];
662 int num_addrs = netdev_mc_count(dev);
663 int i;
664 /* We don't use the multicast table,
665 * but rely on upper-layer filtering
666 */
667 memset(multicast_table, (num_addrs == 0) ? 0 : -1,
668 sizeof(multicast_table));
669 for (i = 0; i < 4; i++) {
670 lance->RAP = CSR8 + (i << 8);
671 /* Logical Address Filter */
672 lance->RDP = swapw(multicast_table[i]);
673 }
674 lance->RAP = CSR15; /* Mode Register */
675 lance->RDP = 0x0000; /* Unset promiscuous mode */
676 }
677
678 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
679 lance->RDP = INEA | STRT | IDON;/* Resume normal operation */
680
681 netif_wake_queue(dev);
682 }
683
684
685 static void __devexit ariadne_remove_one(struct zorro_dev *z)
686 {
687 struct net_device *dev = zorro_get_drvdata(z);
688
689 unregister_netdev(dev);
690 release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960));
691 release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE);
692 free_netdev(dev);
693 }
694
695 static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = {
696 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE },
697 { 0 }
698 };
699 MODULE_DEVICE_TABLE(zorro, ariadne_zorro_tbl);
700
701 static const struct net_device_ops ariadne_netdev_ops = {
702 .ndo_open = ariadne_open,
703 .ndo_stop = ariadne_close,
704 .ndo_start_xmit = ariadne_start_xmit,
705 .ndo_tx_timeout = ariadne_tx_timeout,
706 .ndo_get_stats = ariadne_get_stats,
707 .ndo_set_multicast_list = set_multicast_list,
708 .ndo_validate_addr = eth_validate_addr,
709 .ndo_change_mtu = eth_change_mtu,
710 .ndo_set_mac_address = eth_mac_addr,
711 };
712
713 static int __devinit ariadne_init_one(struct zorro_dev *z,
714 const struct zorro_device_id *ent)
715 {
716 unsigned long board = z->resource.start;
717 unsigned long base_addr = board + ARIADNE_LANCE;
718 unsigned long mem_start = board + ARIADNE_RAM;
719 struct resource *r1, *r2;
720 struct net_device *dev;
721 struct ariadne_private *priv;
722 int err;
723
724 r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960");
725 if (!r1)
726 return -EBUSY;
727 r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM");
728 if (!r2) {
729 release_mem_region(base_addr, sizeof(struct Am79C960));
730 return -EBUSY;
731 }
732
733 dev = alloc_etherdev(sizeof(struct ariadne_private));
734 if (dev == NULL) {
735 release_mem_region(base_addr, sizeof(struct Am79C960));
736 release_mem_region(mem_start, ARIADNE_RAM_SIZE);
737 return -ENOMEM;
738 }
739
740 priv = netdev_priv(dev);
741
742 r1->name = dev->name;
743 r2->name = dev->name;
744
745 dev->dev_addr[0] = 0x00;
746 dev->dev_addr[1] = 0x60;
747 dev->dev_addr[2] = 0x30;
748 dev->dev_addr[3] = (z->rom.er_SerialNumber >> 16) & 0xff;
749 dev->dev_addr[4] = (z->rom.er_SerialNumber >> 8) & 0xff;
750 dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
751 dev->base_addr = ZTWO_VADDR(base_addr);
752 dev->mem_start = ZTWO_VADDR(mem_start);
753 dev->mem_end = dev->mem_start + ARIADNE_RAM_SIZE;
754
755 dev->netdev_ops = &ariadne_netdev_ops;
756 dev->watchdog_timeo = 5 * HZ;
757
758 err = register_netdev(dev);
759 if (err) {
760 release_mem_region(base_addr, sizeof(struct Am79C960));
761 release_mem_region(mem_start, ARIADNE_RAM_SIZE);
762 free_netdev(dev);
763 return err;
764 }
765 zorro_set_drvdata(z, dev);
766
767 netdev_info(dev, "Ariadne at 0x%08lx, Ethernet Address %pM\n",
768 board, dev->dev_addr);
769
770 return 0;
771 }
772
773 static struct zorro_driver ariadne_driver = {
774 .name = "ariadne",
775 .id_table = ariadne_zorro_tbl,
776 .probe = ariadne_init_one,
777 .remove = __devexit_p(ariadne_remove_one),
778 };
779
780 static int __init ariadne_init_module(void)
781 {
782 return zorro_register_driver(&ariadne_driver);
783 }
784
785 static void __exit ariadne_cleanup_module(void)
786 {
787 zorro_unregister_driver(&ariadne_driver);
788 }
789
790 module_init(ariadne_init_module);
791 module_exit(ariadne_cleanup_module);
792
793 MODULE_LICENSE("GPL");
linux-next