projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
m68k: amiga - Zorro bus modalias support
[linux-2.6-block.git] / drivers / net / ariadne.c
CommitLineData
1da177e4
LT		 1/*
2 * Amiga Linux/m68k Ariadne Ethernet Driver
3 *
96de0e25 4 * © Copyright 1995-2003 by Geert Uytterhoeven (geert@linux-m68k.org)
1da177e4
LT		 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>
1da177e4
LT		 43#include <linux/netdevice.h>
44#include <linux/etherdevice.h>
45#include <linux/interrupt.h>
46#include <linux/skbuff.h>
47#include <linux/init.h>
48#include <linux/zorro.h>
49#include <linux/bitops.h>
50
51#include <asm/amigaints.h>
52#include <asm/amigahw.h>
53#include <asm/irq.h>
54
55#include "ariadne.h"
56
57
58#ifdef ARIADNE_DEBUG
59int ariadne_debug = ARIADNE_DEBUG;
60#else
61int ariadne_debug = 1;
62#endif
63
64
65 /*
66 * Macros to Fix Endianness problems
67 */
68
69 /* Swap the Bytes in a WORD */
70#define swapw(x) (((x>>8)&0x00ff)|((x<<8)&0xff00))
71 /* Get the Low BYTE in a WORD */
72#define lowb(x) (x&0xff)
73 /* Get the Swapped High WORD in a LONG */
74#define swhighw(x) ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff))
75 /* Get the Swapped Low WORD in a LONG */
76#define swloww(x) ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff))
77
78
79 /*
80 * Transmit/Receive Ring Definitions
81 */
82
83#define TX_RING_SIZE 5
84#define RX_RING_SIZE 16
85
86#define PKT_BUF_SIZE 1520
87
88
89 /*
90 * Private Device Data
91 */
92
93struct ariadne_private {
94 volatile struct TDRE *tx_ring[TX_RING_SIZE];
95 volatile struct RDRE *rx_ring[RX_RING_SIZE];
96 volatile u_short *tx_buff[TX_RING_SIZE];
97 volatile u_short *rx_buff[RX_RING_SIZE];
98 int cur_tx, cur_rx; /* The next free ring entry */
99 int dirty_tx; /* The ring entries to be free()ed. */
1da177e4
LT		 100 char tx_full;
101};
102
103
104 /*
105 * Structure Created in the Ariadne's RAM Buffer
106 */
107
108struct lancedata {
109 struct TDRE tx_ring[TX_RING_SIZE];
110 struct RDRE rx_ring[RX_RING_SIZE];
111 u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
112 u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
113};
114
115static int ariadne_open(struct net_device *dev);
116static void ariadne_init_ring(struct net_device *dev);
61357325
SH		 117static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb,
118 struct net_device *dev);
1da177e4
LT		 119static void ariadne_tx_timeout(struct net_device *dev);
120static int ariadne_rx(struct net_device *dev);
121static void ariadne_reset(struct net_device *dev);
7d12e780 122static irqreturn_t ariadne_interrupt(int irq, void *data);
1da177e4
LT		 123static int ariadne_close(struct net_device *dev);
124static struct net_device_stats *ariadne_get_stats(struct net_device *dev);
1da177e4 125static void set_multicast_list(struct net_device *dev);
1da177e4
LT		 126
127
128static void memcpyw(volatile u_short *dest, u_short *src, int len)
129{
130 while (len >= 2) {
131 *(dest++) = *(src++);
132 len -= 2;
133 }
134 if (len == 1)
135 *dest = (*(u_char *)src)<<8;
136}
137
138
139static int __devinit ariadne_init_one(struct zorro_dev *z,
140 const struct zorro_device_id *ent);
141static void __devexit ariadne_remove_one(struct zorro_dev *z);
142
143
144static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = {
145 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE },
146 { 0 }
147};
bf54a2b3 148MODULE_DEVICE_TABLE(zorro, ariadne_zorro_tbl);
1da177e4
LT		 149
150static struct zorro_driver ariadne_driver = {
151 .name = "ariadne",
152 .id_table = ariadne_zorro_tbl,
153 .probe = ariadne_init_one,
154 .remove = __devexit_p(ariadne_remove_one),
155};
156
f97b1f2a
AB		 157static const struct net_device_ops ariadne_netdev_ops = {
158 .ndo_open = ariadne_open,
159 .ndo_stop = ariadne_close,
160 .ndo_start_xmit = ariadne_start_xmit,
161 .ndo_tx_timeout = ariadne_tx_timeout,
162 .ndo_get_stats = ariadne_get_stats,
163 .ndo_set_multicast_list = set_multicast_list,
164 .ndo_validate_addr = eth_validate_addr,
165 .ndo_change_mtu = eth_change_mtu,
166 .ndo_set_mac_address = eth_mac_addr,
167};
168
1da177e4
LT		 169static int __devinit ariadne_init_one(struct zorro_dev *z,
170 const struct zorro_device_id *ent)
171{
172 unsigned long board = z->resource.start;
173 unsigned long base_addr = board+ARIADNE_LANCE;
174 unsigned long mem_start = board+ARIADNE_RAM;
175 struct resource *r1, *r2;
176 struct net_device *dev;
177 struct ariadne_private *priv;
178 int err;
179
180 r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960");
181 if (!r1)
182 return -EBUSY;
183 r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM");
184 if (!r2) {
185 release_resource(r1);
186 return -EBUSY;
187 }
188
189 dev = alloc_etherdev(sizeof(struct ariadne_private));
190 if (dev == NULL) {
191 release_resource(r1);
192 release_resource(r2);
193 return -ENOMEM;
194 }
195
1da177e4
LT		 196 priv = netdev_priv(dev);
197
198 r1->name = dev->name;
199 r2->name = dev->name;
200
201 dev->dev_addr[0] = 0x00;
202 dev->dev_addr[1] = 0x60;
203 dev->dev_addr[2] = 0x30;
204 dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff;
205 dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff;
206 dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
207 dev->base_addr = ZTWO_VADDR(base_addr);
208 dev->mem_start = ZTWO_VADDR(mem_start);
209 dev->mem_end = dev->mem_start+ARIADNE_RAM_SIZE;
210
f97b1f2a 211 dev->netdev_ops = &ariadne_netdev_ops;
1da177e4 212 dev->watchdog_timeo = 5*HZ;
1da177e4
LT		 213
214 err = register_netdev(dev);
215 if (err) {
216 release_resource(r1);
217 release_resource(r2);
218 free_netdev(dev);
219 return err;
220 }
221 zorro_set_drvdata(z, dev);
222
e174961c
JB		 223 printk(KERN_INFO "%s: Ariadne at 0x%08lx, Ethernet Address %pM\n",
224 dev->name, board, dev->dev_addr);
1da177e4
LT		 225
226 return 0;
227}
228
229
230static int ariadne_open(struct net_device *dev)
231{
232 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
233 u_short in;
234 u_long version;
235 int i;
236
237 /* Reset the LANCE */
238 in = lance->Reset;
239
240 /* Stop the LANCE */
241 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
242 lance->RDP = STOP;
243
244 /* Check the LANCE version */
245 lance->RAP = CSR88; /* Chip ID */
246 version = swapw(lance->RDP);
247 lance->RAP = CSR89; /* Chip ID */
248 version |= swapw(lance->RDP)<<16;
249 if ((version & 0x00000fff) != 0x00000003) {
250 printk(KERN_WARNING "ariadne_open: Couldn't find AMD Ethernet Chip\n");
251 return -EAGAIN;
252 }
253 if ((version & 0x0ffff000) != 0x00003000) {
254 printk(KERN_WARNING "ariadne_open: Couldn't find Am79C960 (Wrong part "
255 "number = %ld)\n", (version & 0x0ffff000)>>12);
256 return -EAGAIN;
257 }
258#if 0
259 printk(KERN_DEBUG "ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n",
260 (version & 0xf0000000)>>28);
261#endif
262
263 ariadne_init_ring(dev);
264
265 /* Miscellaneous Stuff */
266 lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */
267 lance->RDP = 0x0000;
268 lance->RAP = CSR4; /* Test and Features Control */
269 lance->RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM;
270
271 /* Set the Multicast Table */
272 lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */
273 lance->RDP = 0x0000;
274 lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */
275 lance->RDP = 0x0000;
276 lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */
277 lance->RDP = 0x0000;
278 lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */
279 lance->RDP = 0x0000;
280
281 /* Set the Ethernet Hardware Address */
282 lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */
283 lance->RDP = ((u_short *)&dev->dev_addr[0])[0];
284 lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */
285 lance->RDP = ((u_short *)&dev->dev_addr[0])[1];
286 lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */
287 lance->RDP = ((u_short *)&dev->dev_addr[0])[2];
288
289 /* Set the Init Block Mode */
290 lance->RAP = CSR15; /* Mode Register */
291 lance->RDP = 0x0000;
292
293 /* Set the Transmit Descriptor Ring Pointer */
294 lance->RAP = CSR30; /* Base Address of Transmit Ring */
295 lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
296 lance->RAP = CSR31; /* Base Address of transmit Ring */
297 lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
298
299 /* Set the Receive Descriptor Ring Pointer */
300 lance->RAP = CSR24; /* Base Address of Receive Ring */
301 lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
302 lance->RAP = CSR25; /* Base Address of Receive Ring */
303 lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
304
305 /* Set the Number of RX and TX Ring Entries */
306 lance->RAP = CSR76; /* Receive Ring Length */
307 lance->RDP = swapw(((u_short)-RX_RING_SIZE));
308 lance->RAP = CSR78; /* Transmit Ring Length */
309 lance->RDP = swapw(((u_short)-TX_RING_SIZE));
310
311 /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
312 lance->RAP = ISACSR2; /* Miscellaneous Configuration */
313 lance->IDP = ASEL;
314
315 /* LED Control */
316 lance->RAP = ISACSR5; /* LED1 Status */
317 lance->IDP = PSE|XMTE;
318 lance->RAP = ISACSR6; /* LED2 Status */
319 lance->IDP = PSE|COLE;
320 lance->RAP = ISACSR7; /* LED3 Status */
321 lance->IDP = PSE|RCVE;
322
323 netif_start_queue(dev);
324
1fb9df5d 325 i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, IRQF_SHARED,
1da177e4
LT		 326 dev->name, dev);
327 if (i) return i;
328
329 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
330 lance->RDP = INEA|STRT;
331
332 return 0;
333}
334
335
336static void ariadne_init_ring(struct net_device *dev)
337{
338 struct ariadne_private *priv = netdev_priv(dev);
339 volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start;
340 int i;
341
342 netif_stop_queue(dev);
343
344 priv->tx_full = 0;
345 priv->cur_rx = priv->cur_tx = 0;
346 priv->dirty_tx = 0;
347
348 /* Set up TX Ring */
349 for (i = 0; i < TX_RING_SIZE; i++) {
350 volatile struct TDRE *t = &lancedata->tx_ring[i];
351 t->TMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i]));
352 t->TMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])) |
353 TF_STP | TF_ENP;
354 t->TMD2 = swapw((u_short)-PKT_BUF_SIZE);
355 t->TMD3 = 0;
356 priv->tx_ring[i] = &lancedata->tx_ring[i];
357 priv->tx_buff[i] = lancedata->tx_buff[i];
358#if 0
359 printk(KERN_DEBUG "TX Entry %2d at %p, Buf at %p\n", i,
360 &lancedata->tx_ring[i], lancedata->tx_buff[i]);
361#endif
362 }
363
364 /* Set up RX Ring */
365 for (i = 0; i < RX_RING_SIZE; i++) {
366 volatile struct RDRE *r = &lancedata->rx_ring[i];
367 r->RMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i]));
368 r->RMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])) |
369 RF_OWN;
370 r->RMD2 = swapw((u_short)-PKT_BUF_SIZE);
371 r->RMD3 = 0x0000;
372 priv->rx_ring[i] = &lancedata->rx_ring[i];
373 priv->rx_buff[i] = lancedata->rx_buff[i];
374#if 0
375 printk(KERN_DEBUG "RX Entry %2d at %p, Buf at %p\n", i,
376 &lancedata->rx_ring[i], lancedata->rx_buff[i]);
377#endif
378 }
379}
380
381
382static int ariadne_close(struct net_device *dev)
383{
1da177e4
LT		 384 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
385
386 netif_stop_queue(dev);
387
388 lance->RAP = CSR112; /* Missed Frame Count */
038eddd9 389 dev->stats.rx_missed_errors = swapw(lance->RDP);
1da177e4
LT		 390 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
391
392 if (ariadne_debug > 1) {
393 printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
394 dev->name, lance->RDP);
395 printk(KERN_DEBUG "%s: %lu packets missed\n", dev->name,
038eddd9 396 dev->stats.rx_missed_errors);
1da177e4
LT		 397 }
398
399 /* We stop the LANCE here -- it occasionally polls memory if we don't. */
400 lance->RDP = STOP;
401
402 free_irq(IRQ_AMIGA_PORTS, dev);
403
404 return 0;
405}
406
407
408static inline void ariadne_reset(struct net_device *dev)
409{
410 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
411
412 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
413 lance->RDP = STOP;
414 ariadne_init_ring(dev);
415 lance->RDP = INEA|STRT;
416 netif_start_queue(dev);
417}
418
419
7d12e780 420static irqreturn_t ariadne_interrupt(int irq, void *data)
1da177e4
LT		 421{
422 struct net_device *dev = (struct net_device *)data;
423 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
424 struct ariadne_private *priv;
425 int csr0, boguscnt;
426 int handled = 0;
427
428 if (dev == NULL) {
429 printk(KERN_WARNING "ariadne_interrupt(): irq for unknown device.\n");
430 return IRQ_NONE;
431 }
432
433 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
434
435 if (!(lance->RDP & INTR)) /* Check if any interrupt has been */
436 return IRQ_NONE; /* generated by the board. */
437
438 priv = netdev_priv(dev);
439
440 boguscnt = 10;
441 while ((csr0 = lance->RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) {
442 /* Acknowledge all of the current interrupt sources ASAP. */
443 lance->RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT);
444
445#if 0
446 if (ariadne_debug > 5) {
447 printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.",
448 dev->name, csr0, lance->RDP);
449 printk("[");
450 if (csr0 & INTR)
451 printk(" INTR");
452 if (csr0 & INEA)
453 printk(" INEA");
454 if (csr0 & RXON)
455 printk(" RXON");
456 if (csr0 & TXON)
457 printk(" TXON");
458 if (csr0 & TDMD)
459 printk(" TDMD");
460 if (csr0 & STOP)
461 printk(" STOP");
462 if (csr0 & STRT)
463 printk(" STRT");
464 if (csr0 & INIT)
465 printk(" INIT");
466 if (csr0 & ERR)
467 printk(" ERR");
468 if (csr0 & BABL)
469 printk(" BABL");
470 if (csr0 & CERR)
471 printk(" CERR");
472 if (csr0 & MISS)
473 printk(" MISS");
474 if (csr0 & MERR)
475 printk(" MERR");
476 if (csr0 & RINT)
477 printk(" RINT");
478 if (csr0 & TINT)
479 printk(" TINT");
480 if (csr0 & IDON)
481 printk(" IDON");
482 printk(" ]\n");
483 }
484#endif
485
486 if (csr0 & RINT) { /* Rx interrupt */
487 handled = 1;
488 ariadne_rx(dev);
489 }
490
491 if (csr0 & TINT) { /* Tx-done interrupt */
492 int dirty_tx = priv->dirty_tx;
493
494 handled = 1;
495 while (dirty_tx < priv->cur_tx) {
496 int entry = dirty_tx % TX_RING_SIZE;
497 int status = lowb(priv->tx_ring[entry]->TMD1);
498
499 if (status & TF_OWN)
500 break; /* It still hasn't been Txed */
501
502 priv->tx_ring[entry]->TMD1 &= 0xff00;
503
504 if (status & TF_ERR) {
505 /* There was an major error, log it. */
506 int err_status = priv->tx_ring[entry]->TMD3;
038eddd9 507 dev->stats.tx_errors++;
1da177e4 508 if (err_status & EF_RTRY)
038eddd9 509 dev->stats.tx_aborted_errors++;
1da177e4 510 if (err_status & EF_LCAR)
038eddd9 511 dev->stats.tx_carrier_errors++;
1da177e4 512 if (err_status & EF_LCOL)
038eddd9 513 dev->stats.tx_window_errors++;
1da177e4
LT		 514 if (err_status & EF_UFLO) {
515 /* Ackk! On FIFO errors the Tx unit is turned off! */
038eddd9 516 dev->stats.tx_fifo_errors++;
1da177e4
LT		 517 /* Remove this verbosity later! */
518 printk(KERN_ERR "%s: Tx FIFO error! Status %4.4x.\n",
519 dev->name, csr0);
520 /* Restart the chip. */
521 lance->RDP = STRT;
522 }
523 } else {
524 if (status & (TF_MORE|TF_ONE))
038eddd9
PZ		 525 dev->stats.collisions++;
526 dev->stats.tx_packets++;
1da177e4
LT		 527 }
528 dirty_tx++;
529 }
530
531#ifndef final_version
532 if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
533 printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, "
534 "full=%d.\n", dirty_tx, priv->cur_tx, priv->tx_full);
535 dirty_tx += TX_RING_SIZE;
536 }
537#endif
538
539 if (priv->tx_full && netif_queue_stopped(dev) &&
540 dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
541 /* The ring is no longer full. */
542 priv->tx_full = 0;
543 netif_wake_queue(dev);
544 }
545
546 priv->dirty_tx = dirty_tx;
547 }
548
549 /* Log misc errors. */
550 if (csr0 & BABL) {
551 handled = 1;
038eddd9 552 dev->stats.tx_errors++; /* Tx babble. */
1da177e4
LT		 553 }
554 if (csr0 & MISS) {
555 handled = 1;
038eddd9 556 dev->stats.rx_errors++; /* Missed a Rx frame. */
1da177e4
LT		 557 }
558 if (csr0 & MERR) {
559 handled = 1;
560 printk(KERN_ERR "%s: Bus master arbitration failure, status "
561 "%4.4x.\n", dev->name, csr0);
562 /* Restart the chip. */
563 lance->RDP = STRT;
564 }
565 }
566
567 /* Clear any other interrupt, and set interrupt enable. */
568 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
569 lance->RDP = INEA|BABL|CERR|MISS|MERR|IDON;
570
571#if 0
572 if (ariadne_debug > 4)
573 printk(KERN_DEBUG "%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name,
574 lance->RAP, lance->RDP);
575#endif
576 return IRQ_RETVAL(handled);
577}
578
579
580static void ariadne_tx_timeout(struct net_device *dev)
581{
582 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
583
584 printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n",
585 dev->name, lance->RDP);
586 ariadne_reset(dev);
587 netif_wake_queue(dev);
588}
589
590
61357325
SH		 591static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb,
592 struct net_device *dev)
1da177e4
LT		 593{
594 struct ariadne_private *priv = netdev_priv(dev);
595 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
596 int entry;
597 unsigned long flags;
598 int len = skb->len;
599
600#if 0
601 if (ariadne_debug > 3) {
602 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
603 printk(KERN_DEBUG "%s: ariadne_start_xmit() called, csr0 %4.4x.\n",
604 dev->name, lance->RDP);
605 lance->RDP = 0x0000;
606 }
607#endif
608
609 /* FIXME: is the 79C960 new enough to do its own padding right ? */
610 if (skb->len < ETH_ZLEN)
611 {
5b057c6b 612 if (skb_padto(skb, ETH_ZLEN))
6ed10654 613 return NETDEV_TX_OK;
1da177e4
LT		 614 len = ETH_ZLEN;
615 }
616
617 /* Fill in a Tx ring entry */
618
619#if 0
0795af57 620{
e174961c 621 printk(KERN_DEBUG "TX pkt type 0x%04x from %pM to %pM "
0795af57
JP		 622 " data 0x%08x len %d\n",
623 ((u_short *)skb->data)[6],
e174961c 624 skb->data + 6, skb->data,
0795af57
JP		 625 (int)skb->data, (int)skb->len);
626}
1da177e4
LT		 627#endif
628
629 local_irq_save(flags);
630
631 entry = priv->cur_tx % TX_RING_SIZE;
632
633 /* Caution: the write order is important here, set the base address with
634 the "ownership" bits last. */
635
636 priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
637 priv->tx_ring[entry]->TMD3 = 0x0000;
638 memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len);
639
640#if 0
641 {
642 int i, len;
643
644 len = skb->len > 64 ? 64 : skb->len;
645 len >>= 1;
646 for (i = 0; i < len; i += 8) {
647 int j;
648 printk(KERN_DEBUG "%04x:", i);
649 for (j = 0; (j < 8) && ((i+j) < len); j++) {
650 if (!(j & 1))
651 printk(" ");
652 printk("%04x", priv->tx_buff[entry][i+j]);
653 }
654 printk("\n");
655 }
656 }
657#endif
658
659 priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP;
660
661 dev_kfree_skb(skb);
662
663 priv->cur_tx++;
664 if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) {
665
666#if 0
667 printk(KERN_DEBUG "*** Subtracting TX_RING_SIZE from cur_tx (%d) and "
668 "dirty_tx (%d)\n", priv->cur_tx, priv->dirty_tx);
669#endif
670
671 priv->cur_tx -= TX_RING_SIZE;
672 priv->dirty_tx -= TX_RING_SIZE;
673 }
038eddd9 674 dev->stats.tx_bytes += len;
1da177e4
LT		 675
676 /* Trigger an immediate send poll. */
677 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
678 lance->RDP = INEA|TDMD;
679
680 dev->trans_start = jiffies;
681
682 if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) != 0) {
683 netif_stop_queue(dev);
684 priv->tx_full = 1;
685 }
686 local_irq_restore(flags);
687
6ed10654 688 return NETDEV_TX_OK;
1da177e4
LT		 689}
690
691
692static int ariadne_rx(struct net_device *dev)
693{
694 struct ariadne_private *priv = netdev_priv(dev);
695 int entry = priv->cur_rx % RX_RING_SIZE;
696 int i;
697
698 /* If we own the next entry, it's a new packet. Send it up. */
699 while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
700 int status = lowb(priv->rx_ring[entry]->RMD1);
701
702 if (status != (RF_STP|RF_ENP)) { /* There was an error. */
703 /* There is a tricky error noted by John Murphy,
704 <murf@perftech.com> to Russ Nelson: Even with full-sized
705 buffers it's possible for a jabber packet to use two
706 buffers, with only the last correctly noting the error. */
707 if (status & RF_ENP)
708 /* Only count a general error at the end of a packet.*/
038eddd9 709 dev->stats.rx_errors++;
1da177e4 710 if (status & RF_FRAM)
038eddd9 711 dev->stats.rx_frame_errors++;
1da177e4 712 if (status & RF_OFLO)
038eddd9 713 dev->stats.rx_over_errors++;
1da177e4 714 if (status & RF_CRC)
038eddd9 715 dev->stats.rx_crc_errors++;
1da177e4 716 if (status & RF_BUFF)
038eddd9 717 dev->stats.rx_fifo_errors++;
1da177e4
LT		 718 priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP;
719 } else {
720 /* Malloc up new buffer, compatible with net-3. */
721 short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
722 struct sk_buff *skb;
723
724 skb = dev_alloc_skb(pkt_len+2);
725 if (skb == NULL) {
726 printk(KERN_WARNING "%s: Memory squeeze, deferring packet.\n",
727 dev->name);
728 for (i = 0; i < RX_RING_SIZE; i++)
729 if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN)
730 break;
731
732 if (i > RX_RING_SIZE-2) {
038eddd9 733 dev->stats.rx_dropped++;
1da177e4
LT		 734 priv->rx_ring[entry]->RMD1 |= RF_OWN;
735 priv->cur_rx++;
736 }
737 break;
738 }
739
740
1da177e4
LT		 741 skb_reserve(skb,2); /* 16 byte align */
742 skb_put(skb,pkt_len); /* Make room */
8c7b7faa 743 skb_copy_to_linear_data(skb, (char *)priv->rx_buff[entry], pkt_len);
1da177e4
LT		 744 skb->protocol=eth_type_trans(skb,dev);
745#if 0
0795af57 746{
1da177e4
LT		 747 printk(KERN_DEBUG "RX pkt type 0x%04x from ",
748 ((u_short *)skb->data)[6]);
749 {
1da177e4 750 u_char *ptr = &((u_char *)skb->data)[6];
e174961c 751 printk("%pM", ptr);
1da177e4
LT		 752 }
753 printk(" to ");
754 {
1da177e4 755 u_char *ptr = (u_char *)skb->data;
e174961c 756 printk("%pM", ptr);
1da177e4
LT		 757 }
758 printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
0795af57 759}
1da177e4
LT		 760#endif
761
762 netif_rx(skb);
038eddd9
PZ		 763 dev->stats.rx_packets++;
764 dev->stats.rx_bytes += pkt_len;
1da177e4
LT		 765 }
766
767 priv->rx_ring[entry]->RMD1 |= RF_OWN;
768 entry = (++priv->cur_rx) % RX_RING_SIZE;
769 }
770
771 priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
772
773 /* We should check that at least two ring entries are free. If not,
774 we should free one and mark stats->rx_dropped++. */
775
776 return 0;
777}
778
779
780static struct net_device_stats *ariadne_get_stats(struct net_device *dev)
781{
1da177e4
LT		 782 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
783 short saved_addr;
784 unsigned long flags;
785
786 local_irq_save(flags);
787 saved_addr = lance->RAP;
788 lance->RAP = CSR112; /* Missed Frame Count */
038eddd9 789 dev->stats.rx_missed_errors = swapw(lance->RDP);
1da177e4
LT		 790 lance->RAP = saved_addr;
791 local_irq_restore(flags);
792
038eddd9 793 return &dev->stats;
1da177e4
LT		 794}
795
796
797/* Set or clear the multicast filter for this adaptor.
798 num_addrs == -1 Promiscuous mode, receive all packets
799 num_addrs == 0 Normal mode, clear multicast list
800 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
801 best-effort filtering.
802 */
803static void set_multicast_list(struct net_device *dev)
804{
805 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
806
807 if (!netif_running(dev))
808 return;
809
810 netif_stop_queue(dev);
811
812 /* We take the simple way out and always enable promiscuous mode. */
813 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
814 lance->RDP = STOP; /* Temporarily stop the lance. */
815 ariadne_init_ring(dev);
816
817 if (dev->flags & IFF_PROMISC) {
1da177e4
LT		 818 lance->RAP = CSR15; /* Mode Register */
819 lance->RDP = PROM; /* Set promiscuous mode */
820 } else {
821 short multicast_table[4];
4cd24eaf 822 int num_addrs = netdev_mc_count(dev);
1da177e4
LT		 823 int i;
824 /* We don't use the multicast table, but rely on upper-layer filtering. */
825 memset(multicast_table, (num_addrs == 0) ? 0 : -1,
826 sizeof(multicast_table));
827 for (i = 0; i < 4; i++) {
828 lance->RAP = CSR8+(i<<8); /* Logical Address Filter */
829 lance->RDP = swapw(multicast_table[i]);
830 }
831 lance->RAP = CSR15; /* Mode Register */
832 lance->RDP = 0x0000; /* Unset promiscuous mode */
833 }
834
835 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
836 lance->RDP = INEA|STRT|IDON; /* Resume normal operation. */
837
838 netif_wake_queue(dev);
839}
840
841
842static void __devexit ariadne_remove_one(struct zorro_dev *z)
843{
844 struct net_device *dev = zorro_get_drvdata(z);
845
846 unregister_netdev(dev);
847 release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960));
848 release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE);
849 free_netdev(dev);
850}
851
852static int __init ariadne_init_module(void)
853{
33d8675e 854 return zorro_register_driver(&ariadne_driver);
1da177e4
LT		 855}
856
857static void __exit ariadne_cleanup_module(void)
858{
859 zorro_unregister_driver(&ariadne_driver);
860}
861
862module_init(ariadne_init_module);
863module_exit(ariadne_cleanup_module);
864
865MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)