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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. */ | |
101 | struct net_device_stats stats; | |
102 | char tx_full; | |
103 | }; | |
104 | ||
105 | ||
106 | /* | |
107 | * Structure Created in the Ariadne's RAM Buffer | |
108 | */ | |
109 | ||
110 | struct lancedata { | |
111 | struct TDRE tx_ring[TX_RING_SIZE]; | |
112 | struct RDRE rx_ring[RX_RING_SIZE]; | |
113 | u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)]; | |
114 | u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)]; | |
115 | }; | |
116 | ||
117 | static int ariadne_open(struct net_device *dev); | |
118 | static void ariadne_init_ring(struct net_device *dev); | |
119 | static int ariadne_start_xmit(struct sk_buff *skb, 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); | |
7d12e780 | 123 | static irqreturn_t ariadne_interrupt(int irq, void *data); |
1da177e4 LT |
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 int __devinit ariadne_init_one(struct zorro_dev *z, | |
160 | const struct zorro_device_id *ent) | |
161 | { | |
162 | unsigned long board = z->resource.start; | |
163 | unsigned long base_addr = board+ARIADNE_LANCE; | |
164 | unsigned long mem_start = board+ARIADNE_RAM; | |
165 | struct resource *r1, *r2; | |
166 | struct net_device *dev; | |
167 | struct ariadne_private *priv; | |
168 | int err; | |
0795af57 | 169 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
170 | |
171 | r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960"); | |
172 | if (!r1) | |
173 | return -EBUSY; | |
174 | r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM"); | |
175 | if (!r2) { | |
176 | release_resource(r1); | |
177 | return -EBUSY; | |
178 | } | |
179 | ||
180 | dev = alloc_etherdev(sizeof(struct ariadne_private)); | |
181 | if (dev == NULL) { | |
182 | release_resource(r1); | |
183 | release_resource(r2); | |
184 | return -ENOMEM; | |
185 | } | |
186 | ||
1da177e4 LT |
187 | priv = netdev_priv(dev); |
188 | ||
189 | r1->name = dev->name; | |
190 | r2->name = dev->name; | |
191 | ||
192 | dev->dev_addr[0] = 0x00; | |
193 | dev->dev_addr[1] = 0x60; | |
194 | dev->dev_addr[2] = 0x30; | |
195 | dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff; | |
196 | dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff; | |
197 | dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff; | |
198 | dev->base_addr = ZTWO_VADDR(base_addr); | |
199 | dev->mem_start = ZTWO_VADDR(mem_start); | |
200 | dev->mem_end = dev->mem_start+ARIADNE_RAM_SIZE; | |
201 | ||
202 | dev->open = &ariadne_open; | |
203 | dev->stop = &ariadne_close; | |
204 | dev->hard_start_xmit = &ariadne_start_xmit; | |
205 | dev->tx_timeout = &ariadne_tx_timeout; | |
206 | dev->watchdog_timeo = 5*HZ; | |
207 | dev->get_stats = &ariadne_get_stats; | |
208 | dev->set_multicast_list = &set_multicast_list; | |
209 | ||
210 | err = register_netdev(dev); | |
211 | if (err) { | |
212 | release_resource(r1); | |
213 | release_resource(r2); | |
214 | free_netdev(dev); | |
215 | return err; | |
216 | } | |
217 | zorro_set_drvdata(z, dev); | |
218 | ||
219 | printk(KERN_INFO "%s: Ariadne at 0x%08lx, Ethernet Address " | |
0795af57 JP |
220 | "%s\n", dev->name, board, |
221 | print_mac(mac, dev->dev_addr)); | |
1da177e4 LT |
222 | |
223 | return 0; | |
224 | } | |
225 | ||
226 | ||
227 | static int ariadne_open(struct net_device *dev) | |
228 | { | |
229 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
230 | u_short in; | |
231 | u_long version; | |
232 | int i; | |
233 | ||
234 | /* Reset the LANCE */ | |
235 | in = lance->Reset; | |
236 | ||
237 | /* Stop the LANCE */ | |
238 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
239 | lance->RDP = STOP; | |
240 | ||
241 | /* Check the LANCE version */ | |
242 | lance->RAP = CSR88; /* Chip ID */ | |
243 | version = swapw(lance->RDP); | |
244 | lance->RAP = CSR89; /* Chip ID */ | |
245 | version |= swapw(lance->RDP)<<16; | |
246 | if ((version & 0x00000fff) != 0x00000003) { | |
247 | printk(KERN_WARNING "ariadne_open: Couldn't find AMD Ethernet Chip\n"); | |
248 | return -EAGAIN; | |
249 | } | |
250 | if ((version & 0x0ffff000) != 0x00003000) { | |
251 | printk(KERN_WARNING "ariadne_open: Couldn't find Am79C960 (Wrong part " | |
252 | "number = %ld)\n", (version & 0x0ffff000)>>12); | |
253 | return -EAGAIN; | |
254 | } | |
255 | #if 0 | |
256 | printk(KERN_DEBUG "ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n", | |
257 | (version & 0xf0000000)>>28); | |
258 | #endif | |
259 | ||
260 | ariadne_init_ring(dev); | |
261 | ||
262 | /* Miscellaneous Stuff */ | |
263 | lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */ | |
264 | lance->RDP = 0x0000; | |
265 | lance->RAP = CSR4; /* Test and Features Control */ | |
266 | lance->RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM; | |
267 | ||
268 | /* Set the Multicast Table */ | |
269 | lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */ | |
270 | lance->RDP = 0x0000; | |
271 | lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */ | |
272 | lance->RDP = 0x0000; | |
273 | lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */ | |
274 | lance->RDP = 0x0000; | |
275 | lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */ | |
276 | lance->RDP = 0x0000; | |
277 | ||
278 | /* Set the Ethernet Hardware Address */ | |
279 | lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */ | |
280 | lance->RDP = ((u_short *)&dev->dev_addr[0])[0]; | |
281 | lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */ | |
282 | lance->RDP = ((u_short *)&dev->dev_addr[0])[1]; | |
283 | lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */ | |
284 | lance->RDP = ((u_short *)&dev->dev_addr[0])[2]; | |
285 | ||
286 | /* Set the Init Block Mode */ | |
287 | lance->RAP = CSR15; /* Mode Register */ | |
288 | lance->RDP = 0x0000; | |
289 | ||
290 | /* Set the Transmit Descriptor Ring Pointer */ | |
291 | lance->RAP = CSR30; /* Base Address of Transmit Ring */ | |
292 | lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_ring)); | |
293 | lance->RAP = CSR31; /* Base Address of transmit Ring */ | |
294 | lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_ring)); | |
295 | ||
296 | /* Set the Receive Descriptor Ring Pointer */ | |
297 | lance->RAP = CSR24; /* Base Address of Receive Ring */ | |
298 | lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_ring)); | |
299 | lance->RAP = CSR25; /* Base Address of Receive Ring */ | |
300 | lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_ring)); | |
301 | ||
302 | /* Set the Number of RX and TX Ring Entries */ | |
303 | lance->RAP = CSR76; /* Receive Ring Length */ | |
304 | lance->RDP = swapw(((u_short)-RX_RING_SIZE)); | |
305 | lance->RAP = CSR78; /* Transmit Ring Length */ | |
306 | lance->RDP = swapw(((u_short)-TX_RING_SIZE)); | |
307 | ||
308 | /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */ | |
309 | lance->RAP = ISACSR2; /* Miscellaneous Configuration */ | |
310 | lance->IDP = ASEL; | |
311 | ||
312 | /* LED Control */ | |
313 | lance->RAP = ISACSR5; /* LED1 Status */ | |
314 | lance->IDP = PSE|XMTE; | |
315 | lance->RAP = ISACSR6; /* LED2 Status */ | |
316 | lance->IDP = PSE|COLE; | |
317 | lance->RAP = ISACSR7; /* LED3 Status */ | |
318 | lance->IDP = PSE|RCVE; | |
319 | ||
320 | netif_start_queue(dev); | |
321 | ||
1fb9df5d | 322 | i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, IRQF_SHARED, |
1da177e4 LT |
323 | dev->name, dev); |
324 | if (i) return i; | |
325 | ||
326 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
327 | lance->RDP = INEA|STRT; | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | ||
333 | static void ariadne_init_ring(struct net_device *dev) | |
334 | { | |
335 | struct ariadne_private *priv = netdev_priv(dev); | |
336 | volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start; | |
337 | int i; | |
338 | ||
339 | netif_stop_queue(dev); | |
340 | ||
341 | priv->tx_full = 0; | |
342 | priv->cur_rx = priv->cur_tx = 0; | |
343 | priv->dirty_tx = 0; | |
344 | ||
345 | /* Set up TX Ring */ | |
346 | for (i = 0; i < TX_RING_SIZE; i++) { | |
347 | volatile struct TDRE *t = &lancedata->tx_ring[i]; | |
348 | t->TMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])); | |
349 | t->TMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])) | | |
350 | TF_STP | TF_ENP; | |
351 | t->TMD2 = swapw((u_short)-PKT_BUF_SIZE); | |
352 | t->TMD3 = 0; | |
353 | priv->tx_ring[i] = &lancedata->tx_ring[i]; | |
354 | priv->tx_buff[i] = lancedata->tx_buff[i]; | |
355 | #if 0 | |
356 | printk(KERN_DEBUG "TX Entry %2d at %p, Buf at %p\n", i, | |
357 | &lancedata->tx_ring[i], lancedata->tx_buff[i]); | |
358 | #endif | |
359 | } | |
360 | ||
361 | /* Set up RX Ring */ | |
362 | for (i = 0; i < RX_RING_SIZE; i++) { | |
363 | volatile struct RDRE *r = &lancedata->rx_ring[i]; | |
364 | r->RMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])); | |
365 | r->RMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])) | | |
366 | RF_OWN; | |
367 | r->RMD2 = swapw((u_short)-PKT_BUF_SIZE); | |
368 | r->RMD3 = 0x0000; | |
369 | priv->rx_ring[i] = &lancedata->rx_ring[i]; | |
370 | priv->rx_buff[i] = lancedata->rx_buff[i]; | |
371 | #if 0 | |
372 | printk(KERN_DEBUG "RX Entry %2d at %p, Buf at %p\n", i, | |
373 | &lancedata->rx_ring[i], lancedata->rx_buff[i]); | |
374 | #endif | |
375 | } | |
376 | } | |
377 | ||
378 | ||
379 | static int ariadne_close(struct net_device *dev) | |
380 | { | |
381 | struct ariadne_private *priv = netdev_priv(dev); | |
382 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
383 | ||
384 | netif_stop_queue(dev); | |
385 | ||
386 | lance->RAP = CSR112; /* Missed Frame Count */ | |
387 | priv->stats.rx_missed_errors = swapw(lance->RDP); | |
388 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
389 | ||
390 | if (ariadne_debug > 1) { | |
391 | printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n", | |
392 | dev->name, lance->RDP); | |
393 | printk(KERN_DEBUG "%s: %lu packets missed\n", dev->name, | |
394 | priv->stats.rx_missed_errors); | |
395 | } | |
396 | ||
397 | /* We stop the LANCE here -- it occasionally polls memory if we don't. */ | |
398 | lance->RDP = STOP; | |
399 | ||
400 | free_irq(IRQ_AMIGA_PORTS, dev); | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | ||
406 | static inline void ariadne_reset(struct net_device *dev) | |
407 | { | |
408 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
409 | ||
410 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
411 | lance->RDP = STOP; | |
412 | ariadne_init_ring(dev); | |
413 | lance->RDP = INEA|STRT; | |
414 | netif_start_queue(dev); | |
415 | } | |
416 | ||
417 | ||
7d12e780 | 418 | static irqreturn_t ariadne_interrupt(int irq, void *data) |
1da177e4 LT |
419 | { |
420 | struct net_device *dev = (struct net_device *)data; | |
421 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
422 | struct ariadne_private *priv; | |
423 | int csr0, boguscnt; | |
424 | int handled = 0; | |
425 | ||
426 | if (dev == NULL) { | |
427 | printk(KERN_WARNING "ariadne_interrupt(): irq for unknown device.\n"); | |
428 | return IRQ_NONE; | |
429 | } | |
430 | ||
431 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
432 | ||
433 | if (!(lance->RDP & INTR)) /* Check if any interrupt has been */ | |
434 | return IRQ_NONE; /* generated by the board. */ | |
435 | ||
436 | priv = netdev_priv(dev); | |
437 | ||
438 | boguscnt = 10; | |
439 | while ((csr0 = lance->RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) { | |
440 | /* Acknowledge all of the current interrupt sources ASAP. */ | |
441 | lance->RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT); | |
442 | ||
443 | #if 0 | |
444 | if (ariadne_debug > 5) { | |
445 | printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.", | |
446 | dev->name, csr0, lance->RDP); | |
447 | printk("["); | |
448 | if (csr0 & INTR) | |
449 | printk(" INTR"); | |
450 | if (csr0 & INEA) | |
451 | printk(" INEA"); | |
452 | if (csr0 & RXON) | |
453 | printk(" RXON"); | |
454 | if (csr0 & TXON) | |
455 | printk(" TXON"); | |
456 | if (csr0 & TDMD) | |
457 | printk(" TDMD"); | |
458 | if (csr0 & STOP) | |
459 | printk(" STOP"); | |
460 | if (csr0 & STRT) | |
461 | printk(" STRT"); | |
462 | if (csr0 & INIT) | |
463 | printk(" INIT"); | |
464 | if (csr0 & ERR) | |
465 | printk(" ERR"); | |
466 | if (csr0 & BABL) | |
467 | printk(" BABL"); | |
468 | if (csr0 & CERR) | |
469 | printk(" CERR"); | |
470 | if (csr0 & MISS) | |
471 | printk(" MISS"); | |
472 | if (csr0 & MERR) | |
473 | printk(" MERR"); | |
474 | if (csr0 & RINT) | |
475 | printk(" RINT"); | |
476 | if (csr0 & TINT) | |
477 | printk(" TINT"); | |
478 | if (csr0 & IDON) | |
479 | printk(" IDON"); | |
480 | printk(" ]\n"); | |
481 | } | |
482 | #endif | |
483 | ||
484 | if (csr0 & RINT) { /* Rx interrupt */ | |
485 | handled = 1; | |
486 | ariadne_rx(dev); | |
487 | } | |
488 | ||
489 | if (csr0 & TINT) { /* Tx-done interrupt */ | |
490 | int dirty_tx = priv->dirty_tx; | |
491 | ||
492 | handled = 1; | |
493 | while (dirty_tx < priv->cur_tx) { | |
494 | int entry = dirty_tx % TX_RING_SIZE; | |
495 | int status = lowb(priv->tx_ring[entry]->TMD1); | |
496 | ||
497 | if (status & TF_OWN) | |
498 | break; /* It still hasn't been Txed */ | |
499 | ||
500 | priv->tx_ring[entry]->TMD1 &= 0xff00; | |
501 | ||
502 | if (status & TF_ERR) { | |
503 | /* There was an major error, log it. */ | |
504 | int err_status = priv->tx_ring[entry]->TMD3; | |
505 | priv->stats.tx_errors++; | |
506 | if (err_status & EF_RTRY) | |
507 | priv->stats.tx_aborted_errors++; | |
508 | if (err_status & EF_LCAR) | |
509 | priv->stats.tx_carrier_errors++; | |
510 | if (err_status & EF_LCOL) | |
511 | priv->stats.tx_window_errors++; | |
512 | if (err_status & EF_UFLO) { | |
513 | /* Ackk! On FIFO errors the Tx unit is turned off! */ | |
514 | priv->stats.tx_fifo_errors++; | |
515 | /* Remove this verbosity later! */ | |
516 | printk(KERN_ERR "%s: Tx FIFO error! Status %4.4x.\n", | |
517 | dev->name, csr0); | |
518 | /* Restart the chip. */ | |
519 | lance->RDP = STRT; | |
520 | } | |
521 | } else { | |
522 | if (status & (TF_MORE|TF_ONE)) | |
523 | priv->stats.collisions++; | |
524 | priv->stats.tx_packets++; | |
525 | } | |
526 | dirty_tx++; | |
527 | } | |
528 | ||
529 | #ifndef final_version | |
530 | if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) { | |
531 | printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, " | |
532 | "full=%d.\n", dirty_tx, priv->cur_tx, priv->tx_full); | |
533 | dirty_tx += TX_RING_SIZE; | |
534 | } | |
535 | #endif | |
536 | ||
537 | if (priv->tx_full && netif_queue_stopped(dev) && | |
538 | dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) { | |
539 | /* The ring is no longer full. */ | |
540 | priv->tx_full = 0; | |
541 | netif_wake_queue(dev); | |
542 | } | |
543 | ||
544 | priv->dirty_tx = dirty_tx; | |
545 | } | |
546 | ||
547 | /* Log misc errors. */ | |
548 | if (csr0 & BABL) { | |
549 | handled = 1; | |
550 | priv->stats.tx_errors++; /* Tx babble. */ | |
551 | } | |
552 | if (csr0 & MISS) { | |
553 | handled = 1; | |
554 | priv->stats.rx_errors++; /* Missed a Rx frame. */ | |
555 | } | |
556 | if (csr0 & MERR) { | |
557 | handled = 1; | |
558 | printk(KERN_ERR "%s: Bus master arbitration failure, status " | |
559 | "%4.4x.\n", dev->name, csr0); | |
560 | /* Restart the chip. */ | |
561 | lance->RDP = STRT; | |
562 | } | |
563 | } | |
564 | ||
565 | /* Clear any other interrupt, and set interrupt enable. */ | |
566 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
567 | lance->RDP = INEA|BABL|CERR|MISS|MERR|IDON; | |
568 | ||
569 | #if 0 | |
570 | if (ariadne_debug > 4) | |
571 | printk(KERN_DEBUG "%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name, | |
572 | lance->RAP, lance->RDP); | |
573 | #endif | |
574 | return IRQ_RETVAL(handled); | |
575 | } | |
576 | ||
577 | ||
578 | static void ariadne_tx_timeout(struct net_device *dev) | |
579 | { | |
580 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
581 | ||
582 | printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n", | |
583 | dev->name, lance->RDP); | |
584 | ariadne_reset(dev); | |
585 | netif_wake_queue(dev); | |
586 | } | |
587 | ||
588 | ||
589 | static int ariadne_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
590 | { | |
591 | struct ariadne_private *priv = netdev_priv(dev); | |
592 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
593 | int entry; | |
594 | unsigned long flags; | |
595 | int len = skb->len; | |
596 | ||
597 | #if 0 | |
598 | if (ariadne_debug > 3) { | |
599 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
600 | printk(KERN_DEBUG "%s: ariadne_start_xmit() called, csr0 %4.4x.\n", | |
601 | dev->name, lance->RDP); | |
602 | lance->RDP = 0x0000; | |
603 | } | |
604 | #endif | |
605 | ||
606 | /* FIXME: is the 79C960 new enough to do its own padding right ? */ | |
607 | if (skb->len < ETH_ZLEN) | |
608 | { | |
5b057c6b | 609 | if (skb_padto(skb, ETH_ZLEN)) |
1da177e4 LT |
610 | return 0; |
611 | len = ETH_ZLEN; | |
612 | } | |
613 | ||
614 | /* Fill in a Tx ring entry */ | |
615 | ||
616 | #if 0 | |
0795af57 JP |
617 | { |
618 | DECLARE_MAC_BUF(mac); | |
619 | DECLARE_MAC_BUF(mac2); | |
620 | ||
621 | printk(KERN_DEBUG "TX pkt type 0x%04x from %s to %s " | |
622 | " data 0x%08x len %d\n", | |
623 | ((u_short *)skb->data)[6], | |
624 | print_mac(mac, ((const u8 *)skb->data)+6), | |
625 | print_mac(mac, (const u8 *)skb->data), | |
626 | (int)skb->data, (int)skb->len); | |
627 | } | |
1da177e4 LT |
628 | #endif |
629 | ||
630 | local_irq_save(flags); | |
631 | ||
632 | entry = priv->cur_tx % TX_RING_SIZE; | |
633 | ||
634 | /* Caution: the write order is important here, set the base address with | |
635 | the "ownership" bits last. */ | |
636 | ||
637 | priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len); | |
638 | priv->tx_ring[entry]->TMD3 = 0x0000; | |
639 | memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len); | |
640 | ||
641 | #if 0 | |
642 | { | |
643 | int i, len; | |
644 | ||
645 | len = skb->len > 64 ? 64 : skb->len; | |
646 | len >>= 1; | |
647 | for (i = 0; i < len; i += 8) { | |
648 | int j; | |
649 | printk(KERN_DEBUG "%04x:", i); | |
650 | for (j = 0; (j < 8) && ((i+j) < len); j++) { | |
651 | if (!(j & 1)) | |
652 | printk(" "); | |
653 | printk("%04x", priv->tx_buff[entry][i+j]); | |
654 | } | |
655 | printk("\n"); | |
656 | } | |
657 | } | |
658 | #endif | |
659 | ||
660 | priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP; | |
661 | ||
662 | dev_kfree_skb(skb); | |
663 | ||
664 | priv->cur_tx++; | |
665 | if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) { | |
666 | ||
667 | #if 0 | |
668 | printk(KERN_DEBUG "*** Subtracting TX_RING_SIZE from cur_tx (%d) and " | |
669 | "dirty_tx (%d)\n", priv->cur_tx, priv->dirty_tx); | |
670 | #endif | |
671 | ||
672 | priv->cur_tx -= TX_RING_SIZE; | |
673 | priv->dirty_tx -= TX_RING_SIZE; | |
674 | } | |
3f5d987e | 675 | priv->stats.tx_bytes += len; |
1da177e4 LT |
676 | |
677 | /* Trigger an immediate send poll. */ | |
678 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
679 | lance->RDP = INEA|TDMD; | |
680 | ||
681 | dev->trans_start = jiffies; | |
682 | ||
683 | if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) != 0) { | |
684 | netif_stop_queue(dev); | |
685 | priv->tx_full = 1; | |
686 | } | |
687 | local_irq_restore(flags); | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
692 | ||
693 | static int ariadne_rx(struct net_device *dev) | |
694 | { | |
695 | struct ariadne_private *priv = netdev_priv(dev); | |
696 | int entry = priv->cur_rx % RX_RING_SIZE; | |
697 | int i; | |
698 | ||
699 | /* If we own the next entry, it's a new packet. Send it up. */ | |
700 | while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) { | |
701 | int status = lowb(priv->rx_ring[entry]->RMD1); | |
702 | ||
703 | if (status != (RF_STP|RF_ENP)) { /* There was an error. */ | |
704 | /* There is a tricky error noted by John Murphy, | |
705 | <murf@perftech.com> to Russ Nelson: Even with full-sized | |
706 | buffers it's possible for a jabber packet to use two | |
707 | buffers, with only the last correctly noting the error. */ | |
708 | if (status & RF_ENP) | |
709 | /* Only count a general error at the end of a packet.*/ | |
710 | priv->stats.rx_errors++; | |
711 | if (status & RF_FRAM) | |
712 | priv->stats.rx_frame_errors++; | |
713 | if (status & RF_OFLO) | |
714 | priv->stats.rx_over_errors++; | |
715 | if (status & RF_CRC) | |
716 | priv->stats.rx_crc_errors++; | |
717 | if (status & RF_BUFF) | |
718 | priv->stats.rx_fifo_errors++; | |
719 | priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP; | |
720 | } else { | |
721 | /* Malloc up new buffer, compatible with net-3. */ | |
722 | short pkt_len = swapw(priv->rx_ring[entry]->RMD3); | |
723 | struct sk_buff *skb; | |
724 | ||
725 | skb = dev_alloc_skb(pkt_len+2); | |
726 | if (skb == NULL) { | |
727 | printk(KERN_WARNING "%s: Memory squeeze, deferring packet.\n", | |
728 | dev->name); | |
729 | for (i = 0; i < RX_RING_SIZE; i++) | |
730 | if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN) | |
731 | break; | |
732 | ||
733 | if (i > RX_RING_SIZE-2) { | |
734 | priv->stats.rx_dropped++; | |
735 | priv->rx_ring[entry]->RMD1 |= RF_OWN; | |
736 | priv->cur_rx++; | |
737 | } | |
738 | break; | |
739 | } | |
740 | ||
741 | ||
1da177e4 LT |
742 | skb_reserve(skb,2); /* 16 byte align */ |
743 | skb_put(skb,pkt_len); /* Make room */ | |
8c7b7faa | 744 | skb_copy_to_linear_data(skb, (char *)priv->rx_buff[entry], pkt_len); |
1da177e4 LT |
745 | skb->protocol=eth_type_trans(skb,dev); |
746 | #if 0 | |
0795af57 JP |
747 | { |
748 | DECLARE_MAC_BUF(mac); | |
749 | ||
1da177e4 LT |
750 | printk(KERN_DEBUG "RX pkt type 0x%04x from ", |
751 | ((u_short *)skb->data)[6]); | |
752 | { | |
1da177e4 | 753 | u_char *ptr = &((u_char *)skb->data)[6]; |
0795af57 | 754 | printk("%s", print_mac(mac, ptr)); |
1da177e4 LT |
755 | } |
756 | printk(" to "); | |
757 | { | |
1da177e4 | 758 | u_char *ptr = (u_char *)skb->data; |
0795af57 | 759 | printk("%s", print_mac(mac, ptr)); |
1da177e4 LT |
760 | } |
761 | printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len); | |
0795af57 | 762 | } |
1da177e4 LT |
763 | #endif |
764 | ||
765 | netif_rx(skb); | |
766 | dev->last_rx = jiffies; | |
767 | priv->stats.rx_packets++; | |
768 | priv->stats.rx_bytes += pkt_len; | |
769 | } | |
770 | ||
771 | priv->rx_ring[entry]->RMD1 |= RF_OWN; | |
772 | entry = (++priv->cur_rx) % RX_RING_SIZE; | |
773 | } | |
774 | ||
775 | priv->cur_rx = priv->cur_rx % RX_RING_SIZE; | |
776 | ||
777 | /* We should check that at least two ring entries are free. If not, | |
778 | we should free one and mark stats->rx_dropped++. */ | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | ||
784 | static struct net_device_stats *ariadne_get_stats(struct net_device *dev) | |
785 | { | |
786 | struct ariadne_private *priv = netdev_priv(dev); | |
787 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
788 | short saved_addr; | |
789 | unsigned long flags; | |
790 | ||
791 | local_irq_save(flags); | |
792 | saved_addr = lance->RAP; | |
793 | lance->RAP = CSR112; /* Missed Frame Count */ | |
794 | priv->stats.rx_missed_errors = swapw(lance->RDP); | |
795 | lance->RAP = saved_addr; | |
796 | local_irq_restore(flags); | |
797 | ||
798 | return &priv->stats; | |
799 | } | |
800 | ||
801 | ||
802 | /* Set or clear the multicast filter for this adaptor. | |
803 | num_addrs == -1 Promiscuous mode, receive all packets | |
804 | num_addrs == 0 Normal mode, clear multicast list | |
805 | num_addrs > 0 Multicast mode, receive normal and MC packets, and do | |
806 | best-effort filtering. | |
807 | */ | |
808 | static void set_multicast_list(struct net_device *dev) | |
809 | { | |
810 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; | |
811 | ||
812 | if (!netif_running(dev)) | |
813 | return; | |
814 | ||
815 | netif_stop_queue(dev); | |
816 | ||
817 | /* We take the simple way out and always enable promiscuous mode. */ | |
818 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
819 | lance->RDP = STOP; /* Temporarily stop the lance. */ | |
820 | ariadne_init_ring(dev); | |
821 | ||
822 | if (dev->flags & IFF_PROMISC) { | |
1da177e4 LT |
823 | lance->RAP = CSR15; /* Mode Register */ |
824 | lance->RDP = PROM; /* Set promiscuous mode */ | |
825 | } else { | |
826 | short multicast_table[4]; | |
827 | int num_addrs = dev->mc_count; | |
828 | int i; | |
829 | /* We don't use the multicast table, but rely on upper-layer filtering. */ | |
830 | memset(multicast_table, (num_addrs == 0) ? 0 : -1, | |
831 | sizeof(multicast_table)); | |
832 | for (i = 0; i < 4; i++) { | |
833 | lance->RAP = CSR8+(i<<8); /* Logical Address Filter */ | |
834 | lance->RDP = swapw(multicast_table[i]); | |
835 | } | |
836 | lance->RAP = CSR15; /* Mode Register */ | |
837 | lance->RDP = 0x0000; /* Unset promiscuous mode */ | |
838 | } | |
839 | ||
840 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ | |
841 | lance->RDP = INEA|STRT|IDON; /* Resume normal operation. */ | |
842 | ||
843 | netif_wake_queue(dev); | |
844 | } | |
845 | ||
846 | ||
847 | static void __devexit ariadne_remove_one(struct zorro_dev *z) | |
848 | { | |
849 | struct net_device *dev = zorro_get_drvdata(z); | |
850 | ||
851 | unregister_netdev(dev); | |
852 | release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960)); | |
853 | release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE); | |
854 | free_netdev(dev); | |
855 | } | |
856 | ||
857 | static int __init ariadne_init_module(void) | |
858 | { | |
33d8675e | 859 | return zorro_register_driver(&ariadne_driver); |
1da177e4 LT |
860 | } |
861 | ||
862 | static void __exit ariadne_cleanup_module(void) | |
863 | { | |
864 | zorro_unregister_driver(&ariadne_driver); | |
865 | } | |
866 | ||
867 | module_init(ariadne_init_module); | |
868 | module_exit(ariadne_cleanup_module); | |
869 | ||
870 | MODULE_LICENSE("GPL"); |