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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); | |
61357325 SH |
118 | static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb, |
119 | struct net_device *dev); | |
1da177e4 LT |
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); | |
1da177e4 | 126 | static void set_multicast_list(struct net_device *dev); |
1da177e4 LT |
127 | |
128 | ||
129 | static void memcpyw(volatile u_short *dest, u_short *src, int len) | |
130 | { | |
131 | while (len >= 2) { | |
132 | *(dest++) = *(src++); | |
133 | len -= 2; | |
134 | } | |
135 | if (len == 1) | |
136 | *dest = (*(u_char *)src)<<8; | |
137 | } | |
138 | ||
139 | ||
140 | static int __devinit ariadne_init_one(struct zorro_dev *z, | |
141 | const struct zorro_device_id *ent); | |
142 | static void __devexit ariadne_remove_one(struct zorro_dev *z); | |
143 | ||
144 | ||
145 | static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = { | |
146 | { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE }, | |
147 | { 0 } | |
148 | }; | |
149 | ||
150 | static 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 |
157 | static 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 |
169 | static 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 | ||
230 | static 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 | ||
336 | static 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 | ||
382 | static 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 | ||
408 | static 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 | 420 | static 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 | ||
580 | static 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 |
591 | static 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 | ||
692 | static 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 | ||
780 | static 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 | */ | |
803 | static 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 | ||
842 | static 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 | ||
852 | static int __init ariadne_init_module(void) | |
853 | { | |
33d8675e | 854 | return zorro_register_driver(&ariadne_driver); |
1da177e4 LT |
855 | } |
856 | ||
857 | static void __exit ariadne_cleanup_module(void) | |
858 | { | |
859 | zorro_unregister_driver(&ariadne_driver); | |
860 | } | |
861 | ||
862 | module_init(ariadne_init_module); | |
863 | module_exit(ariadne_cleanup_module); | |
864 | ||
865 | MODULE_LICENSE("GPL"); |