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1.1 root 1: /* 3c509.c: A 3c509 EtherLink3 ethernet driver for linux. */
2: /*
3: Written 1993-1998 by Donald Becker.
4:
5: Copyright 1994-1998 by Donald Becker.
6: Copyright 1993 United States Government as represented by the
7: Director, National Security Agency. This software may be used and
8: distributed according to the terms of the GNU Public License,
9: incorporated herein by reference.
10:
11: This driver is for the 3Com EtherLinkIII series.
12:
13: The author may be reached as [email protected] or
14: C/O Center of Excellence in Space Data and Information Sciences
15: Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
16:
17: Known limitations:
18: Because of the way 3c509 ISA detection works it's difficult to predict
19: a priori which of several ISA-mode cards will be detected first.
20:
21: This driver does not use predictive interrupt mode, resulting in higher
22: packet latency but lower overhead. If interrupts are disabled for an
23: unusually long time it could also result in missed packets, but in
24: practice this rarely happens.
25:
26:
27: FIXES:
28: Alan Cox: Removed the 'Unexpected interrupt' bug.
29: Michael Meskes: Upgraded to Donald Becker's version 1.07.
30: Alan Cox: Increased the eeprom delay. Regardless of
31: what the docs say some people definitely
32: get problems with lower (but in card spec)
33: delays
34: v1.10 4/21/97 Fixed module code so that multiple cards may be detected,
35: other cleanups. -djb
36: v1.13 9/8/97 Made 'max_interrupt_work' an insmod-settable variable -djb
37: v1.14 10/15/97 Avoided waiting..discard message for fast machines -djb
38: v1.15 1/31/98 Faster recovery for Tx errors. -djb
39: v1.16 2/3/98 Different ID port handling to avoid sound cards. -djb
40: */
41:
42: static char *version = "3c509.c:1.16 2/3/98 [email protected]\n";
43: /* A few values that may be tweaked. */
44:
45: /* Time in jiffies before concluding the transmitter is hung. */
46: #define TX_TIMEOUT (400*HZ/1000)
47: /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
48: static int max_interrupt_work = 10;
49:
50: #include <linux/module.h>
51:
52: #include <linux/config.h>
53: #include <linux/kernel.h>
54: #include <linux/sched.h>
55: #include <linux/string.h>
56: #include <linux/interrupt.h>
57: #include <linux/ptrace.h>
58: #include <linux/errno.h>
59: #include <linux/in.h>
60: #include <linux/malloc.h>
61: #include <linux/ioport.h>
62: #include <linux/netdevice.h>
63: #include <linux/etherdevice.h>
64: #include <linux/skbuff.h>
65: #include <linux/config.h> /* for CONFIG_MCA */
66: #include <linux/delay.h> /* for udelay() */
67:
68: #include <asm/bitops.h>
69: #include <asm/io.h>
70:
71: #ifdef EL3_DEBUG
72: int el3_debug = EL3_DEBUG;
73: #else
74: int el3_debug = 2;
75: #endif
76:
77: /* To minimize the size of the driver source I only define operating
78: constants if they are used several times. You'll need the manual
79: anyway if you want to understand driver details. */
80: /* Offsets from base I/O address. */
81: #define EL3_DATA 0x00
82: #define EL3_CMD 0x0e
83: #define EL3_STATUS 0x0e
84: #define EEPROM_READ 0x80
85:
86: #define EL3_IO_EXTENT 16
87:
88: #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
89:
90:
91: /* The top five bits written to EL3_CMD are a command, the lower
92: 11 bits are the parameter, if applicable. */
93: enum c509cmd {
94: TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
95: RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
96: TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
97: FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
98: SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
99: SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
100: StatsDisable = 22<<11, StopCoax = 23<<11,};
101:
102: enum c509status {
103: IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
104: TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
105: IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000, };
106:
107: /* The SetRxFilter command accepts the following classes: */
108: enum RxFilter {
109: RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 };
110:
111: /* Register window 1 offsets, the window used in normal operation. */
112: #define TX_FIFO 0x00
113: #define RX_FIFO 0x00
114: #define RX_STATUS 0x08
115: #define TX_STATUS 0x0B
116: #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
117:
118: #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
119: #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
120: #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
121:
122: /*
123: * Must be a power of two (we use a binary and in the
124: * circular queue)
125: */
126: #define SKB_QUEUE_SIZE 64
127:
128: struct el3_private {
129: struct enet_statistics stats;
130: struct device *next_dev;
131: /* skb send-queue */
132: int head, size;
133: struct sk_buff *queue[SKB_QUEUE_SIZE];
134: };
135: static int id_port = 0x110; /* Start with 0x110 to avoid new sound cards.*/
136: static struct device *el3_root_dev = NULL;
137:
138: static ushort id_read_eeprom(int index);
139: static ushort read_eeprom(int ioaddr, int index);
140: static int el3_open(struct device *dev);
141: static int el3_start_xmit(struct sk_buff *skb, struct device *dev);
142: static void el3_interrupt(int irq, void *dev_id, struct pt_regs *regs);
143: static void update_stats(int addr, struct device *dev);
144: static struct enet_statistics *el3_get_stats(struct device *dev);
145: static int el3_rx(struct device *dev);
146: static int el3_close(struct device *dev);
147: static void set_multicast_list(struct device *dev);
148:
149:
150:
151: int el3_probe(struct device *dev)
152: {
153: short lrs_state = 0xff, i;
154: int ioaddr, irq, if_port;
155: u16 phys_addr[3];
156: static int current_tag = 0;
157:
158: /* First check all slots of the EISA bus. The next slot address to
159: probe is kept in 'eisa_addr' to support multiple probe() calls. */
160: if (EISA_bus) {
161: static int eisa_addr = 0x1000;
162: while (eisa_addr < 0x9000) {
163: ioaddr = eisa_addr;
164: eisa_addr += 0x1000;
165:
166: /* Check the standard EISA ID register for an encoded '3Com'. */
167: if (inw(ioaddr + 0xC80) != 0x6d50)
168: continue;
169:
170: /* Change the register set to the configuration window 0. */
171: outw(SelectWindow | 0, ioaddr + 0xC80 + EL3_CMD);
172:
173: irq = inw(ioaddr + WN0_IRQ) >> 12;
174: if_port = inw(ioaddr + 6)>>14;
175: for (i = 0; i < 3; i++)
176: phys_addr[i] = htons(read_eeprom(ioaddr, i));
177:
178: /* Restore the "Product ID" to the EEPROM read register. */
179: read_eeprom(ioaddr, 3);
180:
181: /* Was the EISA code an add-on hack? Nahhhhh... */
182: goto found;
183: }
184: }
185:
186: #ifdef CONFIG_MCA
187: if (MCA_bus) {
188: mca_adaptor_select_mode(1);
189: for (i = 0; i < 8; i++)
190: if ((mca_adaptor_id(i) | 1) == 0x627c) {
191: ioaddr = mca_pos_base_addr(i);
192: irq = inw(ioaddr + WN0_IRQ) >> 12;
193: if_port = inw(ioaddr + 6)>>14;
194: for (i = 0; i < 3; i++)
195: phys_addr[i] = htons(read_eeprom(ioaddr, i));
196:
197: mca_adaptor_select_mode(0);
198: goto found;
199: }
200: mca_adaptor_select_mode(0);
201:
202: }
203: #endif
204:
205: /* Reset the ISA PnP mechanism on 3c509b. */
206: outb(0x02, 0x279); /* Select PnP config control register. */
207: outb(0x02, 0xA79); /* Return to WaitForKey state. */
208: /* Select an open I/O location at 0x1*0 to do contention select. */
209: for ( ; id_port < 0x200; id_port += 0x10) {
210: if (check_region(id_port, 1))
211: continue;
212: outb(0x00, id_port);
213: outb(0xff, id_port);
214: if (inb(id_port) & 0x01)
215: break;
216: }
217: if (id_port >= 0x200) { /* GCC optimizes this test out. */
218: /* Rare -- do we really need a warning? */
219: printk(" WARNING: No I/O port available for 3c509 activation.\n");
220: return -ENODEV;
221: }
222: /* Next check for all ISA bus boards by sending the ID sequence to the
223: ID_PORT. We find cards past the first by setting the 'current_tag'
224: on cards as they are found. Cards with their tag set will not
225: respond to subsequent ID sequences. */
226:
227: outb(0x00, id_port);
228: outb(0x00, id_port);
229: for(i = 0; i < 255; i++) {
230: outb(lrs_state, id_port);
231: lrs_state <<= 1;
232: lrs_state = lrs_state & 0x100 ? lrs_state ^ 0xcf : lrs_state;
233: }
234:
235: /* For the first probe, clear all board's tag registers. */
236: if (current_tag == 0)
237: outb(0xd0, id_port);
238: else /* Otherwise kill off already-found boards. */
239: outb(0xd8, id_port);
240:
241: if (id_read_eeprom(7) != 0x6d50) {
242: return -ENODEV;
243: }
244:
245: /* Read in EEPROM data, which does contention-select.
246: Only the lowest address board will stay "on-line".
247: 3Com got the byte order backwards. */
248: for (i = 0; i < 3; i++) {
249: phys_addr[i] = htons(id_read_eeprom(i));
250: }
251:
252: {
253: unsigned int iobase = id_read_eeprom(8);
254: if_port = iobase >> 14;
255: ioaddr = 0x200 + ((iobase & 0x1f) << 4);
256: }
257: irq = id_read_eeprom(9) >> 12;
258:
259: if (dev) { /* Set passed-in IRQ or I/O Addr. */
260: if (dev->irq > 1 && dev->irq < 16)
261: irq = dev->irq;
262:
263: if (dev->base_addr) {
264: if (dev->mem_end == 0x3c509 /* Magic key */
265: && dev->base_addr >= 0x200 && dev->base_addr <= 0x3e0)
266: ioaddr = dev->base_addr & 0x3f0;
267: else if (dev->base_addr != ioaddr)
268: return -ENODEV;
269: }
270: }
271:
272: /* Set the adaptor tag so that the next card can be found. */
273: outb(0xd0 + ++current_tag, id_port);
274:
275: /* Activate the adaptor at the EEPROM location. */
276: outb((ioaddr >> 4) | 0xe0, id_port);
277:
278: EL3WINDOW(0);
279: if (inw(ioaddr) != 0x6d50)
280: return -ENODEV;
281:
282: /* Free the interrupt so that some other card can use it. */
283: outw(0x0f00, ioaddr + WN0_IRQ);
284: found:
285: if (dev == NULL) {
286: dev = init_etherdev(dev, sizeof(struct el3_private));
287: }
288: memcpy(dev->dev_addr, phys_addr, sizeof(phys_addr));
289: dev->base_addr = ioaddr;
290: dev->irq = irq;
291: dev->if_port = (dev->mem_start & 0x1f) ? dev->mem_start & 3 : if_port;
292:
293: request_region(dev->base_addr, EL3_IO_EXTENT, "3c509");
294:
295: {
296: const char *if_names[] = {"10baseT", "AUI", "undefined", "BNC"};
297: printk("%s: 3c509 at %#3.3lx tag %d, %s port, address ",
298: dev->name, dev->base_addr, current_tag, if_names[dev->if_port]);
299: }
300:
301: /* Read in the station address. */
302: for (i = 0; i < 6; i++)
303: printk(" %2.2x", dev->dev_addr[i]);
304: printk(", IRQ %d.\n", dev->irq);
305:
306: /* Make up a EL3-specific-data structure. */
307: if (dev->priv == NULL)
308: dev->priv = kmalloc(sizeof(struct el3_private), GFP_KERNEL);
309: if (dev->priv == NULL)
310: return -ENOMEM;
311: memset(dev->priv, 0, sizeof(struct el3_private));
312:
313: ((struct el3_private *)dev->priv)->next_dev = el3_root_dev;
314: el3_root_dev = dev;
315:
316: if (el3_debug > 0)
317: printk(version);
318:
319: /* The EL3-specific entries in the device structure. */
320: dev->open = &el3_open;
321: dev->hard_start_xmit = &el3_start_xmit;
322: dev->stop = &el3_close;
323: dev->get_stats = &el3_get_stats;
324: dev->set_multicast_list = &set_multicast_list;
325:
326: /* Fill in the generic fields of the device structure. */
327: ether_setup(dev);
328: return 0;
329: }
330:
331: /* Read a word from the EEPROM using the regular EEPROM access register.
332: Assume that we are in register window zero.
333: */
334: static ushort read_eeprom(int ioaddr, int index)
335: {
336: outw(EEPROM_READ + index, ioaddr + 10);
337: /* Pause for at least 162 us. for the read to take place. */
338: udelay (500);
339: return inw(ioaddr + 12);
340: }
341:
342: /* Read a word from the EEPROM when in the ISA ID probe state. */
343: static ushort id_read_eeprom(int index)
344: {
345: int bit, word = 0;
346:
347: /* Issue read command, and pause for at least 162 us. for it to complete.
348: Assume extra-fast 16Mhz bus. */
349: outb(EEPROM_READ + index, id_port);
350:
351: /* Pause for at least 162 us. for the read to take place. */
352: udelay (500);
353:
354: for (bit = 15; bit >= 0; bit--)
355: word = (word << 1) + (inb(id_port) & 0x01);
356:
357: if (el3_debug > 3)
358: printk(" 3c509 EEPROM word %d %#4.4x.\n", index, word);
359:
360: return word;
361: }
362:
363:
364:
365: static int
366: el3_open(struct device *dev)
367: {
368: int ioaddr = dev->base_addr;
369: int i;
370:
371: outw(TxReset, ioaddr + EL3_CMD);
372: outw(RxReset, ioaddr + EL3_CMD);
373: outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
374:
375: if (request_irq(dev->irq, &el3_interrupt, 0, "3c509", dev)) {
376: return -EAGAIN;
377: }
378:
379: EL3WINDOW(0);
380: if (el3_debug > 3)
381: printk("%s: Opening, IRQ %d status@%x %4.4x.\n", dev->name,
382: dev->irq, ioaddr + EL3_STATUS, inw(ioaddr + EL3_STATUS));
383:
384: /* Activate board: this is probably unnecessary. */
385: outw(0x0001, ioaddr + 4);
386:
387: /* Set the IRQ line. */
388: outw((dev->irq << 12) | 0x0f00, ioaddr + WN0_IRQ);
389:
390: /* Set the station address in window 2 each time opened. */
391: EL3WINDOW(2);
392:
393: for (i = 0; i < 6; i++)
394: outb(dev->dev_addr[i], ioaddr + i);
395:
396: if (dev->if_port == 3)
397: /* Start the thinnet transceiver. We should really wait 50ms...*/
398: outw(StartCoax, ioaddr + EL3_CMD);
399: else if (dev->if_port == 0) {
400: /* 10baseT interface, enabled link beat and jabber check. */
401: EL3WINDOW(4);
402: outw(inw(ioaddr + WN4_MEDIA) | MEDIA_TP, ioaddr + WN4_MEDIA);
403: }
404:
405: /* Switch to the stats window, and clear all stats by reading. */
406: outw(StatsDisable, ioaddr + EL3_CMD);
407: EL3WINDOW(6);
408: for (i = 0; i < 9; i++)
409: inb(ioaddr + i);
410: inw(ioaddr + 10);
411: inw(ioaddr + 12);
412:
413: /* Switch to register set 1 for normal use. */
414: EL3WINDOW(1);
415:
416: /* Accept b-case and phys addr only. */
417: outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
418: outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
419:
420: dev->interrupt = 0;
421: dev->tbusy = 0;
422: dev->start = 1;
423:
424: outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
425: outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
426: /* Allow status bits to be seen. */
427: outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
428: /* Ack all pending events, and set active indicator mask. */
429: outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
430: ioaddr + EL3_CMD);
431: outw(SetIntrEnb | IntLatch|TxAvailable|TxComplete|RxComplete|StatsFull,
432: ioaddr + EL3_CMD);
433:
434: if (el3_debug > 3)
435: printk("%s: Opened 3c509 IRQ %d status %4.4x.\n",
436: dev->name, dev->irq, inw(ioaddr + EL3_STATUS));
437:
438: MOD_INC_USE_COUNT;
439: return 0; /* Always succeed */
440: }
441:
442: static int
443: el3_start_xmit(struct sk_buff *skb, struct device *dev)
444: {
445: struct el3_private *lp = (struct el3_private *)dev->priv;
446: int ioaddr = dev->base_addr;
447:
448: /* Transmitter timeout, serious problems. */
449: if (dev->tbusy) {
450: int tickssofar = jiffies - dev->trans_start;
451: if (tickssofar < TX_TIMEOUT)
452: return 1;
453: printk("%s: transmit timed out, Tx_status %2.2x status %4.4x "
454: "Tx FIFO room %d.\n",
455: dev->name, inb(ioaddr + TX_STATUS), inw(ioaddr + EL3_STATUS),
456: inw(ioaddr + TX_FREE));
457: lp->stats.tx_errors++;
458: dev->trans_start = jiffies;
459: /* Issue TX_RESET and TX_START commands. */
460: outw(TxReset, ioaddr + EL3_CMD);
461: outw(TxEnable, ioaddr + EL3_CMD);
462: dev->tbusy = 0;
463: }
464:
465: if (el3_debug > 4) {
466: printk("%s: el3_start_xmit(length = %ld) called, status %4.4x.\n",
467: dev->name, skb->len, inw(ioaddr + EL3_STATUS));
468: }
469: #if 0
470: #ifndef final_version
471: { /* Error-checking code, delete someday. */
472: ushort status = inw(ioaddr + EL3_STATUS);
473: if (status & 0x0001 /* IRQ line active, missed one. */
474: && inw(ioaddr + EL3_STATUS) & 1) { /* Make sure. */
475: printk("%s: Missed interrupt, status then %04x now %04x"
476: " Tx %2.2x Rx %4.4x.\n", dev->name, status,
477: inw(ioaddr + EL3_STATUS), inb(ioaddr + TX_STATUS),
478: inw(ioaddr + RX_STATUS));
479: /* Fake interrupt trigger by masking, acknowledge interrupts. */
480: outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
481: outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
482: ioaddr + EL3_CMD);
483: outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
484: }
485: }
486: #endif
487: #endif
488: /* Avoid timer-based retransmission conflicts. */
489: if (set_bit(0, (void*)&dev->tbusy) != 0)
490: printk("%s: Transmitter access conflict.\n", dev->name);
491: else {
492: /* Put out the doubleword header... */
493: outw(skb->len, ioaddr + TX_FIFO);
494: outw(0x00, ioaddr + TX_FIFO);
495: /* ... and the packet rounded to a doubleword. */
496: #ifdef __powerpc__
497: outsl_unswapped(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
498: #else
499: outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
500: #endif
501:
502: dev->trans_start = jiffies;
503: if (inw(ioaddr + TX_FREE) > 1536) {
504: dev->tbusy = 0;
505: } else
506: /* Interrupt us when the FIFO has room for max-sized packet. */
507: outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
508: }
509:
510: dev_kfree_skb (skb, FREE_WRITE);
511:
512: /* Clear the Tx status stack. */
513: {
514: short tx_status;
515: int i = 4;
516:
517: while (--i > 0 && (tx_status = inb(ioaddr + TX_STATUS)) > 0) {
518: if (tx_status & 0x38) lp->stats.tx_aborted_errors++;
519: if (tx_status & 0x30) outw(TxReset, ioaddr + EL3_CMD);
520: if (tx_status & 0x3C) outw(TxEnable, ioaddr + EL3_CMD);
521: outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
522: }
523: }
524: return 0;
525: }
526:
527: /* The EL3 interrupt handler. */
528: static void
529: el3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
530: {
531: struct device *dev = (struct device *)dev_id;
532: int ioaddr, status;
533: int i = max_interrupt_work;
534:
535: if (dev == NULL) {
536: printk ("el3_interrupt(): irq %d for unknown device.\n", irq);
537: return;
538: }
539:
540: if (dev->interrupt)
541: printk("%s: Re-entering the interrupt handler.\n", dev->name);
542: dev->interrupt = 1;
543:
544: ioaddr = dev->base_addr;
545: status = inw(ioaddr + EL3_STATUS);
546:
547: if (el3_debug > 4)
548: printk("%s: interrupt, status %4.4x.\n", dev->name, status);
549:
550: while ((status = inw(ioaddr + EL3_STATUS)) &
551: (IntLatch | RxComplete | StatsFull)) {
552:
553: if (status & RxComplete)
554: el3_rx(dev);
555:
556: if (status & TxAvailable) {
557: if (el3_debug > 5)
558: printk(" TX room bit was handled.\n");
559: /* There's room in the FIFO for a full-sized packet. */
560: outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
561: dev->tbusy = 0;
562: mark_bh(NET_BH);
563: }
564: if (status & (AdapterFailure | RxEarly | StatsFull | TxComplete)) {
565: /* Handle all uncommon interrupts. */
566: if (status & StatsFull) /* Empty statistics. */
567: update_stats(ioaddr, dev);
568: if (status & RxEarly) { /* Rx early is unused. */
569: el3_rx(dev);
570: outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
571: }
572: if (status & TxComplete) { /* Really Tx error. */
573: struct el3_private *lp = (struct el3_private *)dev->priv;
574: short tx_status;
575: int i = 4;
576:
577: while (--i>0 && (tx_status = inb(ioaddr + TX_STATUS)) > 0) {
578: if (tx_status & 0x38) lp->stats.tx_aborted_errors++;
579: if (tx_status & 0x30) outw(TxReset, ioaddr + EL3_CMD);
580: if (tx_status & 0x3C) outw(TxEnable, ioaddr + EL3_CMD);
581: outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
582: }
583: }
584: if (status & AdapterFailure) {
585: /* Adapter failure requires Rx reset and reinit. */
586: outw(RxReset, ioaddr + EL3_CMD);
587: /* Set the Rx filter to the current state. */
588: outw(SetRxFilter | RxStation | RxBroadcast
589: | (dev->flags & IFF_ALLMULTI ? RxMulticast : 0)
590: | (dev->flags & IFF_PROMISC ? RxProm : 0),
591: ioaddr + EL3_CMD);
592: outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
593: outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
594: }
595: }
596:
597: if (--i < 0) {
598: printk("%s: Infinite loop in interrupt, status %4.4x.\n",
599: dev->name, status);
600: /* Clear all interrupts. */
601: outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
602: break;
603: }
604: /* Acknowledge the IRQ. */
605: outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); /* Ack IRQ */
606: }
607:
608: if (el3_debug > 4) {
609: printk("%s: exiting interrupt, status %4.4x.\n", dev->name,
610: inw(ioaddr + EL3_STATUS));
611: }
612:
613: dev->interrupt = 0;
614: return;
615: }
616:
617:
618: static struct enet_statistics *
619: el3_get_stats(struct device *dev)
620: {
621: struct el3_private *lp = (struct el3_private *)dev->priv;
622: unsigned long flags;
623:
624: save_flags(flags);
625: cli();
626: update_stats(dev->base_addr, dev);
627: restore_flags(flags);
628: return &lp->stats;
629: }
630:
631: /* Update statistics. We change to register window 6, so this should be run
632: single-threaded if the device is active. This is expected to be a rare
633: operation, and it's simpler for the rest of the driver to assume that
634: window 1 is always valid rather than use a special window-state variable.
635: */
636: static void update_stats(int ioaddr, struct device *dev)
637: {
638: struct el3_private *lp = (struct el3_private *)dev->priv;
639:
640: if (el3_debug > 5)
641: printk(" Updating the statistics.\n");
642: /* Turn off statistics updates while reading. */
643: outw(StatsDisable, ioaddr + EL3_CMD);
644: /* Switch to the stats window, and read everything. */
645: EL3WINDOW(6);
646: lp->stats.tx_carrier_errors += inb(ioaddr + 0);
647: lp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
648: /* Multiple collisions. */ inb(ioaddr + 2);
649: lp->stats.collisions += inb(ioaddr + 3);
650: lp->stats.tx_window_errors += inb(ioaddr + 4);
651: lp->stats.rx_fifo_errors += inb(ioaddr + 5);
652: lp->stats.tx_packets += inb(ioaddr + 6);
653: /* Rx packets */ inb(ioaddr + 7);
654: /* Tx deferrals */ inb(ioaddr + 8);
655: inw(ioaddr + 10); /* Total Rx and Tx octets. */
656: inw(ioaddr + 12);
657:
658: /* Back to window 1, and turn statistics back on. */
659: EL3WINDOW(1);
660: outw(StatsEnable, ioaddr + EL3_CMD);
661: return;
662: }
663:
664: static int
665: el3_rx(struct device *dev)
666: {
667: struct el3_private *lp = (struct el3_private *)dev->priv;
668: int ioaddr = dev->base_addr;
669: short rx_status;
670:
671: if (el3_debug > 5)
672: printk(" In rx_packet(), status %4.4x, rx_status %4.4x.\n",
673: inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
674: while ((rx_status = inw(ioaddr + RX_STATUS)) > 0) {
675: if (rx_status & 0x4000) { /* Error, update stats. */
676: short error = rx_status & 0x3800;
677:
678: outw(RxDiscard, ioaddr + EL3_CMD);
679: lp->stats.rx_errors++;
680: switch (error) {
681: case 0x0000: lp->stats.rx_over_errors++; break;
682: case 0x0800: lp->stats.rx_length_errors++; break;
683: case 0x1000: lp->stats.rx_frame_errors++; break;
684: case 0x1800: lp->stats.rx_length_errors++; break;
685: case 0x2000: lp->stats.rx_frame_errors++; break;
686: case 0x2800: lp->stats.rx_crc_errors++; break;
687: }
688: } else {
689: short pkt_len = rx_status & 0x7ff;
690: struct sk_buff *skb;
691:
692: skb = dev_alloc_skb(pkt_len+5);
693: if (el3_debug > 4)
694: printk("Receiving packet size %d status %4.4x.\n",
695: pkt_len, rx_status);
696: if (skb != NULL) {
697: skb->dev = dev;
698: skb_reserve(skb, 2); /* Align IP on 16 byte */
699:
700: /* 'skb->data' points to the start of sk_buff data area. */
701: #ifdef __powerpc__
702: insl_unswapped(ioaddr+RX_FIFO, skb_put(skb,pkt_len),
703: (pkt_len + 3) >> 2);
704: #else
705: insl(ioaddr + RX_FIFO, skb_put(skb,pkt_len),
706: (pkt_len + 3) >> 2);
707: #endif
708:
709: outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
710: skb->protocol = eth_type_trans(skb,dev);
711: netif_rx(skb);
712: lp->stats.rx_packets++;
713: continue;
714: }
715: outw(RxDiscard, ioaddr + EL3_CMD);
716: lp->stats.rx_dropped++;
717: if (el3_debug)
718: printk("%s: Couldn't allocate a sk_buff of size %d.\n",
719: dev->name, pkt_len);
720: }
721: inw(ioaddr + EL3_STATUS); /* Delay. */
722: while (inw(ioaddr + EL3_STATUS) & 0x1000)
723: printk(" Waiting for 3c509 to discard packet, status %x.\n",
724: inw(ioaddr + EL3_STATUS) );
725: }
726:
727: return 0;
728: }
729:
730: /*
731: * Set or clear the multicast filter for this adaptor.
732: */
733: static void
734: set_multicast_list(struct device *dev)
735: {
736: int ioaddr = dev->base_addr;
737: if (el3_debug > 1) {
738: static int old = 0;
739: if (old != dev->mc_count) {
740: old = dev->mc_count;
741: printk("%s: Setting Rx mode to %d addresses.\n", dev->name, dev->mc_count);
742: }
743: }
744: if (dev->flags&IFF_PROMISC) {
745: outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
746: ioaddr + EL3_CMD);
747: }
748: else if (dev->mc_count || (dev->flags&IFF_ALLMULTI)) {
749: outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast, ioaddr + EL3_CMD);
750: }
751: else
752: outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
753: }
754:
755: static int
756: el3_close(struct device *dev)
757: {
758: int ioaddr = dev->base_addr;
759:
760: if (el3_debug > 2)
761: printk("%s: Shutting down ethercard.\n", dev->name);
762:
763: dev->tbusy = 1;
764: dev->start = 0;
765:
766: /* Turn off statistics ASAP. We update lp->stats below. */
767: outw(StatsDisable, ioaddr + EL3_CMD);
768:
769: /* Disable the receiver and transmitter. */
770: outw(RxDisable, ioaddr + EL3_CMD);
771: outw(TxDisable, ioaddr + EL3_CMD);
772:
773: if (dev->if_port == 3)
774: /* Turn off thinnet power. Green! */
775: outw(StopCoax, ioaddr + EL3_CMD);
776: else if (dev->if_port == 0) {
777: /* Disable link beat and jabber, if_port may change ere next open(). */
778: EL3WINDOW(4);
779: outw(inw(ioaddr + WN4_MEDIA) & ~MEDIA_TP, ioaddr + WN4_MEDIA);
780: }
781:
782: free_irq(dev->irq, dev);
783: /* Switching back to window 0 disables the IRQ. */
784: EL3WINDOW(0);
785: /* But we explicitly zero the IRQ line select anyway. */
786: outw(0x0f00, ioaddr + WN0_IRQ);
787:
788: update_stats(ioaddr, dev);
789: MOD_DEC_USE_COUNT;
790: return 0;
791: }
792:
793: #ifdef MODULE
794: /* Parameters that may be passed into the module. */
795: static int debug = -1;
796: static int irq[] = {-1, -1, -1, -1, -1, -1, -1, -1};
797: static int xcvr[] = {-1, -1, -1, -1, -1, -1, -1, -1};
798:
799: int
800: init_module(void)
801: {
802: int el3_cards = 0;
803:
804: if (debug >= 0)
805: el3_debug = debug;
806:
807: el3_root_dev = NULL;
808: while (el3_probe(0) == 0) {
809: if (irq[el3_cards] > 1)
810: el3_root_dev->irq = irq[el3_cards];
811: if (xcvr[el3_cards] >= 0)
812: el3_root_dev->if_port = xcvr[el3_cards];
813: el3_cards++;
814: }
815:
816: return el3_cards ? 0 : -ENODEV;
817: }
818:
819: void
820: cleanup_module(void)
821: {
822: struct device *next_dev;
823:
824: /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
825: while (el3_root_dev) {
826: next_dev = ((struct el3_private *)el3_root_dev->priv)->next_dev;
827: unregister_netdev(el3_root_dev);
828: release_region(el3_root_dev->base_addr, EL3_IO_EXTENT);
829: kfree(el3_root_dev);
830: el3_root_dev = next_dev;
831: }
832: }
833: #endif /* MODULE */
834:
835: /*
836: * Local variables:
837: * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c 3c509.c"
838: * version-control: t
839: * kept-new-versions: 5
840: * tab-width: 4
841: * End:
842: */
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