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