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Remove all #inclusions of asm/system.h
[linux-2.6.git] / drivers / net / ethernet / i825xx / eexpress.c
blobcc2e66ad4436e1852a6b1f12977c0126db80ae1c
1 /* Intel EtherExpress 16 device driver for Linux
2 *
3 * Written by John Sullivan, 1995
4 * based on original code by Donald Becker, with changes by
5 * Alan Cox and Pauline Middelink.
6 *
7 * Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
8 *
9 * Many modifications, and currently maintained, by
10 * Philip Blundell <philb@gnu.org>
11 * Added the Compaq LTE Alan Cox <alan@lxorguk.ukuu.org.uk>
12 * Added MCA support Adam Fritzler
13 *
14 * Note - this driver is experimental still - it has problems on faster
15 * machines. Someone needs to sit down and go through it line by line with
16 * a databook...
17 */
18
19 /* The EtherExpress 16 is a fairly simple card, based on a shared-memory
20 * design using the i82586 Ethernet coprocessor. It bears no relationship,
21 * as far as I know, to the similarly-named "EtherExpress Pro" range.
22 *
23 * Historically, Linux support for these cards has been very bad. However,
24 * things seem to be getting better slowly.
25 */
26
27 /* If your card is confused about what sort of interface it has (eg it
28 * persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
29 * or 'SOFTSET /LISA' from DOS seems to help.
30 */
31
32 /* Here's the scoop on memory mapping.
33 *
34 * There are three ways to access EtherExpress card memory: either using the
35 * shared-memory mapping, or using PIO through the dataport, or using PIO
36 * through the "shadow memory" ports.
37 *
38 * The shadow memory system works by having the card map some of its memory
39 * as follows:
40 *
41 * (the low five bits of the SMPTR are ignored)
42 *
43 * base+0x4000..400f memory at SMPTR+0..15
44 * base+0x8000..800f memory at SMPTR+16..31
45 * base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently)
46 * base+0xc008..c00f memory at 0x0008..0x000f
47 *
48 * This last set (the one at c008) is particularly handy because the SCB
49 * lives at 0x0008. So that set of ports gives us easy random access to data
50 * in the SCB without having to mess around setting up pointers and the like.
51 * We always use this method to access the SCB (via the scb_xx() functions).
52 *
53 * Dataport access works by aiming the appropriate (read or write) pointer
54 * at the first address you're interested in, and then reading or writing from
55 * the dataport. The pointers auto-increment after each transfer. We use
56 * this for data transfer.
57 *
58 * We don't use the shared-memory system because it allegedly doesn't work on
59 * all cards, and because it's a bit more prone to go wrong (it's one more
60 * thing to configure...).
61 */
62
63 /* Known bugs:
64 *
65 * - The card seems to want to give us two interrupts every time something
66 * happens, where just one would be better.
67 */
68
69 /*
70 *
71 * Note by Zoltan Szilagyi 10-12-96:
72 *
73 * I've succeeded in eliminating the "CU wedged" messages, and hence the
74 * lockups, which were only occurring with cards running in 8-bit mode ("force
75 * 8-bit operation" in Intel's SoftSet utility). This version of the driver
76 * sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
77 * CU before submitting a packet for transmission, and then restarts it as soon
78 * as the process of handing the packet is complete. This is definitely an
79 * unnecessary slowdown if the card is running in 16-bit mode; therefore one
80 * should detect 16-bit vs 8-bit mode from the EEPROM settings and act
81 * accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
82 * ftp's, which is significantly better than I get in DOS, so the overhead of
83 * stopping and restarting the CU with each transmit is not prohibitive in
84 * practice.
85 *
86 * Update by David Woodhouse 11/5/99:
87 *
88 * I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
89 * I assume that this is because 16-bit accesses are actually handled as two
90 * 8-bit accesses.
91 */
92
93 #ifdef __alpha__
94 #define LOCKUP16 1
95 #endif
96 #ifndef LOCKUP16
97 #define LOCKUP16 0
98 #endif
99
100 #include <linux/module.h>
101 #include <linux/kernel.h>
102 #include <linux/types.h>
103 #include <linux/fcntl.h>
104 #include <linux/interrupt.h>
105 #include <linux/ioport.h>
106 #include <linux/string.h>
107 #include <linux/in.h>
108 #include <linux/delay.h>
109 #include <linux/errno.h>
110 #include <linux/init.h>
111 #include <linux/netdevice.h>
112 #include <linux/etherdevice.h>
113 #include <linux/skbuff.h>
114 #include <linux/mca-legacy.h>
115 #include <linux/spinlock.h>
116 #include <linux/bitops.h>
117 #include <linux/jiffies.h>
118
119 #include <asm/io.h>
120 #include <asm/irq.h>
121
122 #ifndef NET_DEBUG
123 #define NET_DEBUG 4
124 #endif
125
126 #include "eexpress.h"
127
128 #define EEXP_IO_EXTENT 16
129
130 /*
131 * Private data declarations
132 */
133
134 struct net_local
135 {
136 unsigned long last_tx; /* jiffies when last transmit started */
137 unsigned long init_time; /* jiffies when eexp_hw_init586 called */
138 unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
139 unsigned short rx_last; /* last rx buf */
140 unsigned short rx_ptr; /* first rx buf to look at */
141 unsigned short tx_head; /* next free tx buf */
142 unsigned short tx_reap; /* first in-use tx buf */
143 unsigned short tx_tail; /* previous tx buf to tx_head */
144 unsigned short tx_link; /* last known-executing tx buf */
145 unsigned short last_tx_restart; /* set to tx_link when we
146 restart the CU */
147 unsigned char started;
148 unsigned short rx_buf_start;
149 unsigned short rx_buf_end;
150 unsigned short num_tx_bufs;
151 unsigned short num_rx_bufs;
152 unsigned char width; /* 0 for 16bit, 1 for 8bit */
153 unsigned char was_promisc;
154 unsigned char old_mc_count;
155 spinlock_t lock;
156 };
157
158 /* This is the code and data that is downloaded to the EtherExpress card's
159 * memory at boot time.
160 */
161
162 static unsigned short start_code[] = {
163 /* 0x0000 */
164 0x0001, /* ISCP: busy - cleared after reset */
165 0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */
166
167 0x0000,0x0000, /* SCB: status, commands */
168 0x0000,0x0000, /* links to first command block,
169 first receive descriptor */
170 0x0000,0x0000, /* CRC error, alignment error counts */
171 0x0000,0x0000, /* out of resources, overrun error counts */
172
173 0x0000,0x0000, /* pad */
174 0x0000,0x0000,
175
176 /* 0x20 -- start of 82586 CU program */
177 #define CONF_LINK 0x20
178 0x0000,Cmd_Config,
179 0x0032, /* link to next command */
180 0x080c, /* 12 bytes follow : fifo threshold=8 */
181 0x2e40, /* don't rx bad frames
182 * SRDY/ARDY => ext. sync. : preamble len=8
183 * take addresses from data buffers
184 * 6 bytes/address
185 */
186 0x6000, /* default backoff method & priority
187 * interframe spacing = 0x60 */
188 0xf200, /* slot time=0x200
189 * max collision retry = 0xf */
190 #define CONF_PROMISC 0x2e
191 0x0000, /* no HDLC : normal CRC : enable broadcast
192 * disable promiscuous/multicast modes */
193 0x003c, /* minimum frame length = 60 octets) */
194
195 0x0000,Cmd_SetAddr,
196 0x003e, /* link to next command */
197 #define CONF_HWADDR 0x38
198 0x0000,0x0000,0x0000, /* hardware address placed here */
199
200 0x0000,Cmd_MCast,
201 0x0076, /* link to next command */
202 #define CONF_NR_MULTICAST 0x44
203 0x0000, /* number of bytes in multicast address(es) */
204 #define CONF_MULTICAST 0x46
205 0x0000, 0x0000, 0x0000, /* some addresses */
206 0x0000, 0x0000, 0x0000,
207 0x0000, 0x0000, 0x0000,
208 0x0000, 0x0000, 0x0000,
209 0x0000, 0x0000, 0x0000,
210 0x0000, 0x0000, 0x0000,
211 0x0000, 0x0000, 0x0000,
212 0x0000, 0x0000, 0x0000,
213
214 #define CONF_DIAG_RESULT 0x76
215 0x0000, Cmd_Diag,
216 0x007c, /* link to next command */
217
218 0x0000,Cmd_TDR|Cmd_INT,
219 0x0084,
220 #define CONF_TDR_RESULT 0x82
221 0x0000,
222
223 0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
224 0x0084 /* dummy link */
225 };
226
227 /* maps irq number to EtherExpress magic value */
228 static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
229
230 #ifdef CONFIG_MCA_LEGACY
231 /* mapping of the first four bits of the second POS register */
232 static unsigned short mca_iomap[] = {
233 0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
234 0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
235 };
236 /* bits 5-7 of the second POS register */
237 static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
238 #endif
239
240 /*
241 * Prototypes for Linux interface
242 */
243
244 static int eexp_open(struct net_device *dev);
245 static int eexp_close(struct net_device *dev);
246 static void eexp_timeout(struct net_device *dev);
247 static netdev_tx_t eexp_xmit(struct sk_buff *buf,
248 struct net_device *dev);
249
250 static irqreturn_t eexp_irq(int irq, void *dev_addr);
251 static void eexp_set_multicast(struct net_device *dev);
252
253 /*
254 * Prototypes for hardware access functions
255 */
256
257 static void eexp_hw_rx_pio(struct net_device *dev);
258 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
259 unsigned short len);
260 static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
261 static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
262 unsigned char location);
263
264 static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
265 static void eexp_hw_txrestart(struct net_device *dev);
266
267 static void eexp_hw_txinit (struct net_device *dev);
268 static void eexp_hw_rxinit (struct net_device *dev);
269
270 static void eexp_hw_init586 (struct net_device *dev);
271 static void eexp_setup_filter (struct net_device *dev);
272
273 static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
274 enum eexp_iftype {AUI=0, BNC=1, TPE=2};
275
276 #define STARTED_RU 2
277 #define STARTED_CU 1
278
279 /*
280 * Primitive hardware access functions.
281 */
282
283 static inline unsigned short scb_status(struct net_device *dev)
284 {
285 return inw(dev->base_addr + 0xc008);
286 }
287
288 static inline unsigned short scb_rdcmd(struct net_device *dev)
289 {
290 return inw(dev->base_addr + 0xc00a);
291 }
292
293 static inline void scb_command(struct net_device *dev, unsigned short cmd)
294 {
295 outw(cmd, dev->base_addr + 0xc00a);
296 }
297
298 static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
299 {
300 outw(val, dev->base_addr + 0xc00c);
301 }
302
303 static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
304 {
305 outw(val, dev->base_addr + 0xc00e);
306 }
307
308 static inline void set_loopback(struct net_device *dev)
309 {
310 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
311 }
312
313 static inline void clear_loopback(struct net_device *dev)
314 {
315 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
316 }
317
318 static inline unsigned short int SHADOW(short int addr)
319 {
320 addr &= 0x1f;
321 if (addr > 0xf) addr += 0x3ff0;
322 return addr + 0x4000;
323 }
324
325 /*
326 * Linux interface
327 */
328
329 /*
330 * checks for presence of EtherExpress card
331 */
332
333 static int __init do_express_probe(struct net_device *dev)
334 {
335 unsigned short *port;
336 static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
337 unsigned short ioaddr = dev->base_addr;
338 int dev_irq = dev->irq;
339 int err;
340
341 dev->if_port = 0xff; /* not set */
342
343 #ifdef CONFIG_MCA_LEGACY
344 if (MCA_bus) {
345 int slot = 0;
346
347 /*
348 * Only find one card at a time. Subsequent calls
349 * will find others, however, proper multicard MCA
350 * probing and setup can't be done with the
351 * old-style Space.c init routines. -- ASF
352 */
353 while (slot != MCA_NOTFOUND) {
354 int pos0, pos1;
355
356 slot = mca_find_unused_adapter(0x628B, slot);
357 if (slot == MCA_NOTFOUND)
358 break;
359
360 pos0 = mca_read_stored_pos(slot, 2);
361 pos1 = mca_read_stored_pos(slot, 3);
362 ioaddr = mca_iomap[pos1&0xf];
363
364 dev->irq = mca_irqmap[(pos1>>4)&0x7];
365
366 /*
367 * XXX: Transceiver selection is done
368 * differently on the MCA version.
369 * How to get it to select something
370 * other than external/AUI is currently
371 * unknown. This code is just for looks. -- ASF
372 */
373 if ((pos0 & 0x7) == 0x1)
374 dev->if_port = AUI;
375 else if ((pos0 & 0x7) == 0x5) {
376 if (pos1 & 0x80)
377 dev->if_port = BNC;
378 else
379 dev->if_port = TPE;
380 }
381
382 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
383 mca_set_adapter_procfn(slot, NULL, dev);
384 mca_mark_as_used(slot);
385
386 break;
387 }
388 }
389 #endif
390 if (ioaddr&0xfe00) {
391 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
392 return -EBUSY;
393 err = eexp_hw_probe(dev,ioaddr);
394 release_region(ioaddr, EEXP_IO_EXTENT);
395 return err;
396 } else if (ioaddr)
397 return -ENXIO;
398
399 for (port=&ports[0] ; *port ; port++ )
400 {
401 unsigned short sum = 0;
402 int i;
403 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
404 continue;
405 for ( i=0 ; i<4 ; i++ )
406 {
407 unsigned short t;
408 t = inb(*port + ID_PORT);
409 sum |= (t>>4) << ((t & 0x03)<<2);
410 }
411 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
412 release_region(*port, EEXP_IO_EXTENT);
413 return 0;
414 }
415 release_region(*port, EEXP_IO_EXTENT);
416 dev->irq = dev_irq;
417 }
418 return -ENODEV;
419 }
420
421 #ifndef MODULE
422 struct net_device * __init express_probe(int unit)
423 {
424 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
425 int err;
426
427 if (!dev)
428 return ERR_PTR(-ENOMEM);
429
430 sprintf(dev->name, "eth%d", unit);
431 netdev_boot_setup_check(dev);
432
433 err = do_express_probe(dev);
434 if (!err)
435 return dev;
436 free_netdev(dev);
437 return ERR_PTR(err);
438 }
439 #endif
440
441 /*
442 * open and initialize the adapter, ready for use
443 */
444
445 static int eexp_open(struct net_device *dev)
446 {
447 int ret;
448 unsigned short ioaddr = dev->base_addr;
449 struct net_local *lp = netdev_priv(dev);
450
451 #if NET_DEBUG > 6
452 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
453 #endif
454
455 if (!dev->irq || !irqrmap[dev->irq])
456 return -ENXIO;
457
458 ret = request_irq(dev->irq, eexp_irq, 0, dev->name, dev);
459 if (ret)
460 return ret;
461
462 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
463 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
464 , ioaddr);
465 goto err_out1;
466 }
467 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
468 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
469 , ioaddr+0x4000);
470 goto err_out2;
471 }
472 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
473 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
474 , ioaddr+0x8000);
475 goto err_out3;
476 }
477 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
478 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
479 , ioaddr+0xc000);
480 goto err_out4;
481 }
482
483 if (lp->width) {
484 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
485 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
486 }
487
488 eexp_hw_init586(dev);
489 netif_start_queue(dev);
490 #if NET_DEBUG > 6
491 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
492 #endif
493 return 0;
494
495 err_out4:
496 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
497 err_out3:
498 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
499 err_out2:
500 release_region(ioaddr, EEXP_IO_EXTENT);
501 err_out1:
502 free_irq(dev->irq, dev);
503 return -EBUSY;
504 }
505
506 /*
507 * close and disable the interface, leaving the 586 in reset.
508 */
509
510 static int eexp_close(struct net_device *dev)
511 {
512 unsigned short ioaddr = dev->base_addr;
513 struct net_local *lp = netdev_priv(dev);
514
515 int irq = dev->irq;
516
517 netif_stop_queue(dev);
518
519 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
520 lp->started = 0;
521 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
522 outb(0,ioaddr+SIGNAL_CA);
523 free_irq(irq,dev);
524 outb(i586_RST,ioaddr+EEPROM_Ctrl);
525 release_region(ioaddr, EEXP_IO_EXTENT);
526 release_region(ioaddr+0x4000, 16);
527 release_region(ioaddr+0x8000, 16);
528 release_region(ioaddr+0xc000, 16);
529
530 return 0;
531 }
532
533 /*
534 * This gets called when a higher level thinks we are broken. Check that
535 * nothing has become jammed in the CU.
536 */
537
538 static void unstick_cu(struct net_device *dev)
539 {
540 struct net_local *lp = netdev_priv(dev);
541 unsigned short ioaddr = dev->base_addr;
542
543 if (lp->started)
544 {
545 if (time_after(jiffies, dev_trans_start(dev) + HZ/2))
546 {
547 if (lp->tx_link==lp->last_tx_restart)
548 {
549 unsigned short boguscount=200,rsst;
550 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
551 dev->name, scb_status(dev));
552 eexp_hw_txinit(dev);
553 lp->last_tx_restart = 0;
554 scb_wrcbl(dev, lp->tx_link);
555 scb_command(dev, SCB_CUstart);
556 outb(0,ioaddr+SIGNAL_CA);
557 while (!SCB_complete(rsst=scb_status(dev)))
558 {
559 if (!--boguscount)
560 {
561 boguscount=200;
562 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
563 dev->name,rsst);
564 scb_wrcbl(dev, lp->tx_link);
565 scb_command(dev, SCB_CUstart);
566 outb(0,ioaddr+SIGNAL_CA);
567 }
568 }
569 netif_wake_queue(dev);
570 }
571 else
572 {
573 unsigned short status = scb_status(dev);
574 if (SCB_CUdead(status))
575 {
576 unsigned short txstatus = eexp_hw_lasttxstat(dev);
577 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
578 dev->name, status, txstatus);
579 eexp_hw_txrestart(dev);
580 }
581 else
582 {
583 unsigned short txstatus = eexp_hw_lasttxstat(dev);
584 if (netif_queue_stopped(dev) && !txstatus)
585 {
586 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
587 dev->name,status,txstatus);
588 eexp_hw_init586(dev);
589 netif_wake_queue(dev);
590 }
591 else
592 {
593 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
594 }
595 }
596 }
597 }
598 }
599 else
600 {
601 if (time_after(jiffies, lp->init_time + 10))
602 {
603 unsigned short status = scb_status(dev);
604 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
605 dev->name, status);
606 eexp_hw_init586(dev);
607 netif_wake_queue(dev);
608 }
609 }
610 }
611
612 static void eexp_timeout(struct net_device *dev)
613 {
614 struct net_local *lp = netdev_priv(dev);
615 #ifdef CONFIG_SMP
616 unsigned long flags;
617 #endif
618 int status;
619
620 disable_irq(dev->irq);
621
622 /*
623 * Best would be to use synchronize_irq(); spin_lock() here
624 * lets make it work first..
625 */
626
627 #ifdef CONFIG_SMP
628 spin_lock_irqsave(&lp->lock, flags);
629 #endif
630
631 status = scb_status(dev);
632 unstick_cu(dev);
633 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
634 (SCB_complete(status)?"lost interrupt":
635 "board on fire"));
636 dev->stats.tx_errors++;
637 lp->last_tx = jiffies;
638 if (!SCB_complete(status)) {
639 scb_command(dev, SCB_CUabort);
640 outb(0,dev->base_addr+SIGNAL_CA);
641 }
642 netif_wake_queue(dev);
643 #ifdef CONFIG_SMP
644 spin_unlock_irqrestore(&lp->lock, flags);
645 #endif
646 }
647
648 /*
649 * Called to transmit a packet, or to allow us to right ourselves
650 * if the kernel thinks we've died.
651 */
652 static netdev_tx_t eexp_xmit(struct sk_buff *buf, struct net_device *dev)
653 {
654 short length = buf->len;
655 #ifdef CONFIG_SMP
656 struct net_local *lp = netdev_priv(dev);
657 unsigned long flags;
658 #endif
659
660 #if NET_DEBUG > 6
661 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
662 #endif
663
664 if (buf->len < ETH_ZLEN) {
665 if (skb_padto(buf, ETH_ZLEN))
666 return NETDEV_TX_OK;
667 length = ETH_ZLEN;
668 }
669
670 disable_irq(dev->irq);
671
672 /*
673 * Best would be to use synchronize_irq(); spin_lock() here
674 * lets make it work first..
675 */
676
677 #ifdef CONFIG_SMP
678 spin_lock_irqsave(&lp->lock, flags);
679 #endif
680
681 {
682 unsigned short *data = (unsigned short *)buf->data;
683
684 dev->stats.tx_bytes += length;
685
686 eexp_hw_tx_pio(dev,data,length);
687 }
688 dev_kfree_skb(buf);
689 #ifdef CONFIG_SMP
690 spin_unlock_irqrestore(&lp->lock, flags);
691 #endif
692 enable_irq(dev->irq);
693 return NETDEV_TX_OK;
694 }
695
696 /*
697 * Handle an EtherExpress interrupt
698 * If we've finished initializing, start the RU and CU up.
699 * If we've already started, reap tx buffers, handle any received packets,
700 * check to make sure we've not become wedged.
701 */
702
703 static unsigned short eexp_start_irq(struct net_device *dev,
704 unsigned short status)
705 {
706 unsigned short ack_cmd = SCB_ack(status);
707 struct net_local *lp = netdev_priv(dev);
708 unsigned short ioaddr = dev->base_addr;
709 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
710 short diag_status, tdr_status;
711 while (SCB_CUstat(status)==2)
712 status = scb_status(dev);
713 #if NET_DEBUG > 4
714 printk("%s: CU went non-active (status %04x)\n",
715 dev->name, status);
716 #endif
717
718 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
719 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
720 if (diag_status & 1<<11) {
721 printk(KERN_WARNING "%s: 82586 failed self-test\n",
722 dev->name);
723 } else if (!(diag_status & 1<<13)) {
724 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
725 }
726
727 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
728 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
729 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
730 printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : "");
731 }
732 else if (tdr_status & TDR_XCVRPROBLEM) {
733 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
734 }
735 else if (tdr_status & TDR_LINKOK) {
736 #if NET_DEBUG > 4
737 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
738 #endif
739 } else {
740 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
741 tdr_status);
742 }
743
744 lp->started |= STARTED_CU;
745 scb_wrcbl(dev, lp->tx_link);
746 /* if the RU isn't running, start it now */
747 if (!(lp->started & STARTED_RU)) {
748 ack_cmd |= SCB_RUstart;
749 scb_wrrfa(dev, lp->rx_buf_start);
750 lp->rx_ptr = lp->rx_buf_start;
751 lp->started |= STARTED_RU;
752 }
753 ack_cmd |= SCB_CUstart | 0x2000;
754 }
755
756 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
757 lp->started|=STARTED_RU;
758
759 return ack_cmd;
760 }
761
762 static void eexp_cmd_clear(struct net_device *dev)
763 {
764 unsigned long int oldtime = jiffies;
765 while (scb_rdcmd(dev) && (time_before(jiffies, oldtime + 10)));
766 if (scb_rdcmd(dev)) {
767 printk("%s: command didn't clear\n", dev->name);
768 }
769 }
770
771 static irqreturn_t eexp_irq(int dummy, void *dev_info)
772 {
773 struct net_device *dev = dev_info;
774 struct net_local *lp;
775 unsigned short ioaddr,status,ack_cmd;
776 unsigned short old_read_ptr, old_write_ptr;
777
778 lp = netdev_priv(dev);
779 ioaddr = dev->base_addr;
780
781 spin_lock(&lp->lock);
782
783 old_read_ptr = inw(ioaddr+READ_PTR);
784 old_write_ptr = inw(ioaddr+WRITE_PTR);
785
786 outb(SIRQ_dis|irqrmap[dev->irq], ioaddr+SET_IRQ);
787
788 status = scb_status(dev);
789
790 #if NET_DEBUG > 4
791 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
792 #endif
793
794 if (lp->started == (STARTED_CU | STARTED_RU)) {
795
796 do {
797 eexp_cmd_clear(dev);
798
799 ack_cmd = SCB_ack(status);
800 scb_command(dev, ack_cmd);
801 outb(0,ioaddr+SIGNAL_CA);
802
803 eexp_cmd_clear(dev);
804
805 if (SCB_complete(status)) {
806 if (!eexp_hw_lasttxstat(dev)) {
807 printk("%s: tx interrupt but no status\n", dev->name);
808 }
809 }
810
811 if (SCB_rxdframe(status))
812 eexp_hw_rx_pio(dev);
813
814 status = scb_status(dev);
815 } while (status & 0xc000);
816
817 if (SCB_RUdead(status))
818 {
819 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
820 dev->name,status);
821 #if 0
822 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
823 outw(lp->cur_rfd, ioaddr+READ_PTR);
824 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
825 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
826 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
827 outw(rbd, ioaddr+READ_PTR);
828 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
829 outw(rbd+8, ioaddr+READ_PTR);
830 printk("[%04x]\n", inw(ioaddr+DATAPORT));
831 #endif
832 dev->stats.rx_errors++;
833 #if 1
834 eexp_hw_rxinit(dev);
835 #else
836 lp->cur_rfd = lp->first_rfd;
837 #endif
838 scb_wrrfa(dev, lp->rx_buf_start);
839 scb_command(dev, SCB_RUstart);
840 outb(0,ioaddr+SIGNAL_CA);
841 }
842 } else {
843 if (status & 0x8000)
844 ack_cmd = eexp_start_irq(dev, status);
845 else
846 ack_cmd = SCB_ack(status);
847 scb_command(dev, ack_cmd);
848 outb(0,ioaddr+SIGNAL_CA);
849 }
850
851 eexp_cmd_clear(dev);
852
853 outb(SIRQ_en|irqrmap[dev->irq], ioaddr+SET_IRQ);
854
855 #if NET_DEBUG > 6
856 printk("%s: leaving eexp_irq()\n", dev->name);
857 #endif
858 outw(old_read_ptr, ioaddr+READ_PTR);
859 outw(old_write_ptr, ioaddr+WRITE_PTR);
860
861 spin_unlock(&lp->lock);
862 return IRQ_HANDLED;
863 }
864
865 /*
866 * Hardware access functions
867 */
868
869 /*
870 * Set the cable type to use.
871 */
872
873 static void eexp_hw_set_interface(struct net_device *dev)
874 {
875 unsigned char oldval = inb(dev->base_addr + 0x300e);
876 oldval &= ~0x82;
877 switch (dev->if_port) {
878 case TPE:
879 oldval |= 0x2;
880 case BNC:
881 oldval |= 0x80;
882 break;
883 }
884 outb(oldval, dev->base_addr+0x300e);
885 mdelay(20);
886 }
887
888 /*
889 * Check all the receive buffers, and hand any received packets
890 * to the upper levels. Basic sanity check on each frame
891 * descriptor, though we don't bother trying to fix broken ones.
892 */
893
894 static void eexp_hw_rx_pio(struct net_device *dev)
895 {
896 struct net_local *lp = netdev_priv(dev);
897 unsigned short rx_block = lp->rx_ptr;
898 unsigned short boguscount = lp->num_rx_bufs;
899 unsigned short ioaddr = dev->base_addr;
900 unsigned short status;
901
902 #if NET_DEBUG > 6
903 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
904 #endif
905
906 do {
907 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
908
909 outw(rx_block, ioaddr + READ_PTR);
910 status = inw(ioaddr + DATAPORT);
911
912 if (FD_Done(status))
913 {
914 rfd_cmd = inw(ioaddr + DATAPORT);
915 rx_next = inw(ioaddr + DATAPORT);
916 pbuf = inw(ioaddr + DATAPORT);
917
918 outw(pbuf, ioaddr + READ_PTR);
919 pkt_len = inw(ioaddr + DATAPORT);
920
921 if (rfd_cmd!=0x0000)
922 {
923 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
924 dev->name, rfd_cmd);
925 continue;
926 }
927 else if (pbuf!=rx_block+0x16)
928 {
929 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
930 dev->name, rx_block+0x16, pbuf);
931 continue;
932 }
933 else if ((pkt_len & 0xc000)!=0xc000)
934 {
935 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
936 dev->name, pkt_len & 0xc000);
937 continue;
938 }
939 else if (!FD_OK(status))
940 {
941 dev->stats.rx_errors++;
942 if (FD_CRC(status))
943 dev->stats.rx_crc_errors++;
944 if (FD_Align(status))
945 dev->stats.rx_frame_errors++;
946 if (FD_Resrc(status))
947 dev->stats.rx_fifo_errors++;
948 if (FD_DMA(status))
949 dev->stats.rx_over_errors++;
950 if (FD_Short(status))
951 dev->stats.rx_length_errors++;
952 }
953 else
954 {
955 struct sk_buff *skb;
956 pkt_len &= 0x3fff;
957 skb = netdev_alloc_skb(dev, pkt_len + 16);
958 if (skb == NULL)
959 {
960 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
961 dev->stats.rx_dropped++;
962 break;
963 }
964 skb_reserve(skb, 2);
965 outw(pbuf+10, ioaddr+READ_PTR);
966 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
967 skb->protocol = eth_type_trans(skb,dev);
968 netif_rx(skb);
969 dev->stats.rx_packets++;
970 dev->stats.rx_bytes += pkt_len;
971 }
972 outw(rx_block, ioaddr+WRITE_PTR);
973 outw(0, ioaddr+DATAPORT);
974 outw(0, ioaddr+DATAPORT);
975 rx_block = rx_next;
976 }
977 } while (FD_Done(status) && boguscount--);
978 lp->rx_ptr = rx_block;
979 }
980
981 /*
982 * Hand a packet to the card for transmission
983 * If we get here, we MUST have already checked
984 * to make sure there is room in the transmit
985 * buffer region.
986 */
987
988 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
989 unsigned short len)
990 {
991 struct net_local *lp = netdev_priv(dev);
992 unsigned short ioaddr = dev->base_addr;
993
994 if (LOCKUP16 || lp->width) {
995 /* Stop the CU so that there is no chance that it
996 jumps off to a bogus address while we are writing the
997 pointer to the next transmit packet in 8-bit mode --
998 this eliminates the "CU wedged" errors in 8-bit mode.
999 (Zoltan Szilagyi 10-12-96) */
1000 scb_command(dev, SCB_CUsuspend);
1001 outw(0xFFFF, ioaddr+SIGNAL_CA);
1002 }
1003
1004 outw(lp->tx_head, ioaddr + WRITE_PTR);
1005
1006 outw(0x0000, ioaddr + DATAPORT);
1007 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1008 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1009 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1010
1011 outw(0x0000, ioaddr + DATAPORT);
1012 outw(0x0000, ioaddr + DATAPORT);
1013 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1014
1015 outw(0x8000|len, ioaddr + DATAPORT);
1016 outw(-1, ioaddr + DATAPORT);
1017 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1018 outw(0, ioaddr + DATAPORT);
1019
1020 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1021
1022 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1023 outw(lp->tx_head, ioaddr + DATAPORT);
1024
1025 dev->trans_start = jiffies;
1026 lp->tx_tail = lp->tx_head;
1027 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1028 lp->tx_head = TX_BUF_START;
1029 else
1030 lp->tx_head += TX_BUF_SIZE;
1031 if (lp->tx_head != lp->tx_reap)
1032 netif_wake_queue(dev);
1033
1034 if (LOCKUP16 || lp->width) {
1035 /* Restart the CU so that the packet can actually
1036 be transmitted. (Zoltan Szilagyi 10-12-96) */
1037 scb_command(dev, SCB_CUresume);
1038 outw(0xFFFF, ioaddr+SIGNAL_CA);
1039 }
1040
1041 dev->stats.tx_packets++;
1042 lp->last_tx = jiffies;
1043 }
1044
1045 static const struct net_device_ops eexp_netdev_ops = {
1046 .ndo_open = eexp_open,
1047 .ndo_stop = eexp_close,
1048 .ndo_start_xmit = eexp_xmit,
1049 .ndo_set_rx_mode = eexp_set_multicast,
1050 .ndo_tx_timeout = eexp_timeout,
1051 .ndo_change_mtu = eth_change_mtu,
1052 .ndo_set_mac_address = eth_mac_addr,
1053 .ndo_validate_addr = eth_validate_addr,
1054 };
1055
1056 /*
1057 * Sanity check the suspected EtherExpress card
1058 * Read hardware address, reset card, size memory and initialize buffer
1059 * memory pointers. These are held in netdev_priv(), in case someone has more
1060 * than one card in a machine.
1061 */
1062
1063 static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1064 {
1065 unsigned short hw_addr[3];
1066 unsigned char buswidth;
1067 unsigned int memory_size;
1068 int i;
1069 unsigned short xsum = 0;
1070 struct net_local *lp = netdev_priv(dev);
1071
1072 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1073
1074 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1075 outb(0, ioaddr+EEPROM_Ctrl);
1076 udelay(500);
1077 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1078
1079 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1080 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1081 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1082
1083 /* Standard Address or Compaq LTE Address */
1084 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
1085 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1086 {
1087 printk(" rejected: invalid address %04x%04x%04x\n",
1088 hw_addr[2],hw_addr[1],hw_addr[0]);
1089 return -ENODEV;
1090 }
1091
1092 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1093 * though.
1094 */
1095 for (i = 0; i < 64; i++)
1096 xsum += eexp_hw_readeeprom(ioaddr, i);
1097 if (xsum != 0xbaba)
1098 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1099
1100 dev->base_addr = ioaddr;
1101 for ( i=0 ; i<6 ; i++ )
1102 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1103
1104 {
1105 static const char irqmap[] = { 0, 9, 3, 4, 5, 10, 11, 0 };
1106 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1107
1108 /* Use the IRQ from EEPROM if none was given */
1109 if (!dev->irq)
1110 dev->irq = irqmap[setupval>>13];
1111
1112 if (dev->if_port == 0xff) {
1113 dev->if_port = !(setupval & 0x1000) ? AUI :
1114 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1115 }
1116
1117 buswidth = !((setupval & 0x400) >> 10);
1118 }
1119
1120 memset(lp, 0, sizeof(struct net_local));
1121 spin_lock_init(&lp->lock);
1122
1123 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1124 eexp_ifmap[dev->if_port], buswidth?8:16);
1125
1126 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1127 return -EBUSY;
1128
1129 eexp_hw_set_interface(dev);
1130
1131 release_region(dev->base_addr + 0x300e, 1);
1132
1133 /* Find out how much RAM we have on the card */
1134 outw(0, dev->base_addr + WRITE_PTR);
1135 for (i = 0; i < 32768; i++)
1136 outw(0, dev->base_addr + DATAPORT);
1137
1138 for (memory_size = 0; memory_size < 64; memory_size++)
1139 {
1140 outw(memory_size<<10, dev->base_addr + READ_PTR);
1141 if (inw(dev->base_addr+DATAPORT))
1142 break;
1143 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1144 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1145 outw(memory_size<<10, dev->base_addr + READ_PTR);
1146 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1147 break;
1148 }
1149
1150 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1151 * of RAM to play with.
1152 */
1153 lp->num_tx_bufs = 4;
1154 lp->rx_buf_end = 0x3ff6;
1155 switch (memory_size)
1156 {
1157 case 64:
1158 lp->rx_buf_end += 0x4000;
1159 case 48:
1160 lp->num_tx_bufs += 4;
1161 lp->rx_buf_end += 0x4000;
1162 case 32:
1163 lp->rx_buf_end += 0x4000;
1164 case 16:
1165 printk(", %dk RAM)\n", memory_size);
1166 break;
1167 default:
1168 printk(") bad memory size (%dk).\n", memory_size);
1169 return -ENODEV;
1170 break;
1171 }
1172
1173 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1174 lp->width = buswidth;
1175
1176 dev->netdev_ops = &eexp_netdev_ops;
1177 dev->watchdog_timeo = 2*HZ;
1178
1179 return register_netdev(dev);
1180 }
1181
1182 /*
1183 * Read a word from the EtherExpress on-board serial EEPROM.
1184 * The EEPROM contains 64 words of 16 bits.
1185 */
1186 static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1187 unsigned char location)
1188 {
1189 unsigned short cmd = 0x180|(location&0x7f);
1190 unsigned short rval = 0,wval = EC_CS|i586_RST;
1191 int i;
1192
1193 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1194 for (i=0x100 ; i ; i>>=1 )
1195 {
1196 if (cmd&i)
1197 wval |= EC_Wr;
1198 else
1199 wval &= ~EC_Wr;
1200
1201 outb(wval,ioaddr+EEPROM_Ctrl);
1202 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1203 eeprom_delay();
1204 outb(wval,ioaddr+EEPROM_Ctrl);
1205 eeprom_delay();
1206 }
1207 wval &= ~EC_Wr;
1208 outb(wval,ioaddr+EEPROM_Ctrl);
1209 for (i=0x8000 ; i ; i>>=1 )
1210 {
1211 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1212 eeprom_delay();
1213 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1214 rval |= i;
1215 outb(wval,ioaddr+EEPROM_Ctrl);
1216 eeprom_delay();
1217 }
1218 wval &= ~EC_CS;
1219 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1220 eeprom_delay();
1221 outb(wval,ioaddr+EEPROM_Ctrl);
1222 eeprom_delay();
1223 return rval;
1224 }
1225
1226 /*
1227 * Reap tx buffers and return last transmit status.
1228 * if ==0 then either:
1229 * a) we're not transmitting anything, so why are we here?
1230 * b) we've died.
1231 * otherwise, Stat_Busy(return) means we've still got some packets
1232 * to transmit, Stat_Done(return) means our buffers should be empty
1233 * again
1234 */
1235
1236 static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1237 {
1238 struct net_local *lp = netdev_priv(dev);
1239 unsigned short tx_block = lp->tx_reap;
1240 unsigned short status;
1241
1242 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1243 return 0x0000;
1244
1245 do
1246 {
1247 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1248 status = inw(dev->base_addr + SHADOW(tx_block));
1249 if (!Stat_Done(status))
1250 {
1251 lp->tx_link = tx_block;
1252 return status;
1253 }
1254 else
1255 {
1256 lp->last_tx_restart = 0;
1257 dev->stats.collisions += Stat_NoColl(status);
1258 if (!Stat_OK(status))
1259 {
1260 char *whatsup = NULL;
1261 dev->stats.tx_errors++;
1262 if (Stat_Abort(status))
1263 dev->stats.tx_aborted_errors++;
1264 if (Stat_TNoCar(status)) {
1265 whatsup = "aborted, no carrier";
1266 dev->stats.tx_carrier_errors++;
1267 }
1268 if (Stat_TNoCTS(status)) {
1269 whatsup = "aborted, lost CTS";
1270 dev->stats.tx_carrier_errors++;
1271 }
1272 if (Stat_TNoDMA(status)) {
1273 whatsup = "FIFO underran";
1274 dev->stats.tx_fifo_errors++;
1275 }
1276 if (Stat_TXColl(status)) {
1277 whatsup = "aborted, too many collisions";
1278 dev->stats.tx_aborted_errors++;
1279 }
1280 if (whatsup)
1281 printk(KERN_INFO "%s: transmit %s\n",
1282 dev->name, whatsup);
1283 }
1284 else
1285 dev->stats.tx_packets++;
1286 }
1287 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1288 lp->tx_reap = tx_block = TX_BUF_START;
1289 else
1290 lp->tx_reap = tx_block += TX_BUF_SIZE;
1291 netif_wake_queue(dev);
1292 }
1293 while (lp->tx_reap != lp->tx_head);
1294
1295 lp->tx_link = lp->tx_tail + 0x08;
1296
1297 return status;
1298 }
1299
1300 /*
1301 * This should never happen. It is called when some higher routine detects
1302 * that the CU has stopped, to try to restart it from the last packet we knew
1303 * we were working on, or the idle loop if we had finished for the time.
1304 */
1305
1306 static void eexp_hw_txrestart(struct net_device *dev)
1307 {
1308 struct net_local *lp = netdev_priv(dev);
1309 unsigned short ioaddr = dev->base_addr;
1310
1311 lp->last_tx_restart = lp->tx_link;
1312 scb_wrcbl(dev, lp->tx_link);
1313 scb_command(dev, SCB_CUstart);
1314 outb(0,ioaddr+SIGNAL_CA);
1315
1316 {
1317 unsigned short boguscount=50,failcount=5;
1318 while (!scb_status(dev))
1319 {
1320 if (!--boguscount)
1321 {
1322 if (--failcount)
1323 {
1324 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1325 scb_wrcbl(dev, lp->tx_link);
1326 scb_command(dev, SCB_CUstart);
1327 outb(0,ioaddr+SIGNAL_CA);
1328 boguscount = 100;
1329 }
1330 else
1331 {
1332 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1333 eexp_hw_init586(dev);
1334 netif_wake_queue(dev);
1335 return;
1336 }
1337 }
1338 }
1339 }
1340 }
1341
1342 /*
1343 * Writes down the list of transmit buffers into card memory. Each
1344 * entry consists of an 82586 transmit command, followed by a jump
1345 * pointing to itself. When we want to transmit a packet, we write
1346 * the data into the appropriate transmit buffer and then modify the
1347 * preceding jump to point at the new transmit command. This means that
1348 * the 586 command unit is continuously active.
1349 */
1350
1351 static void eexp_hw_txinit(struct net_device *dev)
1352 {
1353 struct net_local *lp = netdev_priv(dev);
1354 unsigned short tx_block = TX_BUF_START;
1355 unsigned short curtbuf;
1356 unsigned short ioaddr = dev->base_addr;
1357
1358 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1359 {
1360 outw(tx_block, ioaddr + WRITE_PTR);
1361
1362 outw(0x0000, ioaddr + DATAPORT);
1363 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1364 outw(tx_block+0x08, ioaddr + DATAPORT);
1365 outw(tx_block+0x0e, ioaddr + DATAPORT);
1366
1367 outw(0x0000, ioaddr + DATAPORT);
1368 outw(0x0000, ioaddr + DATAPORT);
1369 outw(tx_block+0x08, ioaddr + DATAPORT);
1370
1371 outw(0x8000, ioaddr + DATAPORT);
1372 outw(-1, ioaddr + DATAPORT);
1373 outw(tx_block+0x16, ioaddr + DATAPORT);
1374 outw(0x0000, ioaddr + DATAPORT);
1375
1376 tx_block += TX_BUF_SIZE;
1377 }
1378 lp->tx_head = TX_BUF_START;
1379 lp->tx_reap = TX_BUF_START;
1380 lp->tx_tail = tx_block - TX_BUF_SIZE;
1381 lp->tx_link = lp->tx_tail + 0x08;
1382 lp->rx_buf_start = tx_block;
1383
1384 }
1385
1386 /*
1387 * Write the circular list of receive buffer descriptors to card memory.
1388 * The end of the list isn't marked, which means that the 82586 receive
1389 * unit will loop until buffers become available (this avoids it giving us
1390 * "out of resources" messages).
1391 */
1392
1393 static void eexp_hw_rxinit(struct net_device *dev)
1394 {
1395 struct net_local *lp = netdev_priv(dev);
1396 unsigned short rx_block = lp->rx_buf_start;
1397 unsigned short ioaddr = dev->base_addr;
1398
1399 lp->num_rx_bufs = 0;
1400 lp->rx_first = lp->rx_ptr = rx_block;
1401 do
1402 {
1403 lp->num_rx_bufs++;
1404
1405 outw(rx_block, ioaddr + WRITE_PTR);
1406
1407 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1408 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1409 outw(0xffff, ioaddr+DATAPORT);
1410
1411 outw(0x0000, ioaddr+DATAPORT);
1412 outw(0xdead, ioaddr+DATAPORT);
1413 outw(0xdead, ioaddr+DATAPORT);
1414 outw(0xdead, ioaddr+DATAPORT);
1415 outw(0xdead, ioaddr+DATAPORT);
1416 outw(0xdead, ioaddr+DATAPORT);
1417 outw(0xdead, ioaddr+DATAPORT);
1418
1419 outw(0x0000, ioaddr+DATAPORT);
1420 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1421 outw(rx_block + 0x20, ioaddr+DATAPORT);
1422 outw(0, ioaddr+DATAPORT);
1423 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1424
1425 lp->rx_last = rx_block;
1426 rx_block += RX_BUF_SIZE;
1427 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1428
1429
1430 /* Make first Rx frame descriptor point to first Rx buffer
1431 descriptor */
1432 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1433 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1434
1435 /* Close Rx frame descriptor ring */
1436 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1437 outw(lp->rx_first, ioaddr+DATAPORT);
1438
1439 /* Close Rx buffer descriptor ring */
1440 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1441 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1442
1443 }
1444
1445 /*
1446 * Un-reset the 586, and start the configuration sequence. We don't wait for
1447 * this to finish, but allow the interrupt handler to start the CU and RU for
1448 * us. We can't start the receive/transmission system up before we know that
1449 * the hardware is configured correctly.
1450 */
1451
1452 static void eexp_hw_init586(struct net_device *dev)
1453 {
1454 struct net_local *lp = netdev_priv(dev);
1455 unsigned short ioaddr = dev->base_addr;
1456 int i;
1457
1458 #if NET_DEBUG > 6
1459 printk("%s: eexp_hw_init586()\n", dev->name);
1460 #endif
1461
1462 lp->started = 0;
1463
1464 set_loopback(dev);
1465
1466 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1467
1468 /* Download the startup code */
1469 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1470 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1471 outw(0x0000, ioaddr + 0x8008);
1472 outw(0x0000, ioaddr + 0x800a);
1473 outw(0x0000, ioaddr + 0x800c);
1474 outw(0x0000, ioaddr + 0x800e);
1475
1476 for (i = 0; i < ARRAY_SIZE(start_code) * 2; i+=32) {
1477 int j;
1478 outw(i, ioaddr + SM_PTR);
1479 for (j = 0; j < 16 && (i+j)/2 < ARRAY_SIZE(start_code); j+=2)
1480 outw(start_code[(i+j)/2],
1481 ioaddr+0x4000+j);
1482 for (j = 0; j < 16 && (i+j+16)/2 < ARRAY_SIZE(start_code); j+=2)
1483 outw(start_code[(i+j+16)/2],
1484 ioaddr+0x8000+j);
1485 }
1486
1487 /* Do we want promiscuous mode or multicast? */
1488 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1489 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1490 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1491 ioaddr+SHADOW(CONF_PROMISC));
1492 lp->was_promisc = dev->flags & IFF_PROMISC;
1493 #if 0
1494 eexp_setup_filter(dev);
1495 #endif
1496
1497 /* Write our hardware address */
1498 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1499 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
1500 outw(((unsigned short *)dev->dev_addr)[1],
1501 ioaddr+SHADOW(CONF_HWADDR+2));
1502 outw(((unsigned short *)dev->dev_addr)[2],
1503 ioaddr+SHADOW(CONF_HWADDR+4));
1504
1505 eexp_hw_txinit(dev);
1506 eexp_hw_rxinit(dev);
1507
1508 outb(0,ioaddr+EEPROM_Ctrl);
1509 mdelay(5);
1510
1511 scb_command(dev, 0xf000);
1512 outb(0,ioaddr+SIGNAL_CA);
1513
1514 outw(0, ioaddr+SM_PTR);
1515
1516 {
1517 unsigned short rboguscount=50,rfailcount=5;
1518 while (inw(ioaddr+0x4000))
1519 {
1520 if (!--rboguscount)
1521 {
1522 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1523 dev->name);
1524 scb_command(dev, 0);
1525 outb(0,ioaddr+SIGNAL_CA);
1526 rboguscount = 100;
1527 if (!--rfailcount)
1528 {
1529 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1530 dev->name);
1531 return;
1532 }
1533 }
1534 }
1535 }
1536
1537 scb_wrcbl(dev, CONF_LINK);
1538 scb_command(dev, 0xf000|SCB_CUstart);
1539 outb(0,ioaddr+SIGNAL_CA);
1540
1541 {
1542 unsigned short iboguscount=50,ifailcount=5;
1543 while (!scb_status(dev))
1544 {
1545 if (!--iboguscount)
1546 {
1547 if (--ifailcount)
1548 {
1549 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1550 dev->name, scb_status(dev), scb_rdcmd(dev));
1551 scb_wrcbl(dev, CONF_LINK);
1552 scb_command(dev, 0xf000|SCB_CUstart);
1553 outb(0,ioaddr+SIGNAL_CA);
1554 iboguscount = 100;
1555 }
1556 else
1557 {
1558 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1559 return;
1560 }
1561 }
1562 }
1563 }
1564
1565 clear_loopback(dev);
1566 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1567
1568 lp->init_time = jiffies;
1569 #if NET_DEBUG > 6
1570 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1571 #endif
1572 }
1573
1574 static void eexp_setup_filter(struct net_device *dev)
1575 {
1576 struct netdev_hw_addr *ha;
1577 unsigned short ioaddr = dev->base_addr;
1578 int count = netdev_mc_count(dev);
1579 int i;
1580 if (count > 8) {
1581 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1582 dev->name, count);
1583 count = 8;
1584 }
1585
1586 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1587 outw(6*count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1588 i = 0;
1589 netdev_for_each_mc_addr(ha, dev) {
1590 unsigned short *data = (unsigned short *) ha->addr;
1591
1592 if (i == count)
1593 break;
1594 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1595 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1596 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1597 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1598 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1599 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1600 i++;
1601 }
1602 }
1603
1604 /*
1605 * Set or clear the multicast filter for this adaptor.
1606 */
1607 static void
1608 eexp_set_multicast(struct net_device *dev)
1609 {
1610 unsigned short ioaddr = dev->base_addr;
1611 struct net_local *lp = netdev_priv(dev);
1612 int kick = 0, i;
1613 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1614 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1615 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1616 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1617 ioaddr+SHADOW(CONF_PROMISC));
1618 lp->was_promisc = dev->flags & IFF_PROMISC;
1619 kick = 1;
1620 }
1621 if (!(dev->flags & IFF_PROMISC)) {
1622 eexp_setup_filter(dev);
1623 if (lp->old_mc_count != netdev_mc_count(dev)) {
1624 kick = 1;
1625 lp->old_mc_count = netdev_mc_count(dev);
1626 }
1627 }
1628 if (kick) {
1629 unsigned long oj;
1630 scb_command(dev, SCB_CUsuspend);
1631 outb(0, ioaddr+SIGNAL_CA);
1632 outb(0, ioaddr+SIGNAL_CA);
1633 #if 0
1634 printk("%s: waiting for CU to go suspended\n", dev->name);
1635 #endif
1636 oj = jiffies;
1637 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1638 (time_before(jiffies, oj + 2000)));
1639 if (SCB_CUstat(scb_status(dev)) == 2)
1640 printk("%s: warning, CU didn't stop\n", dev->name);
1641 lp->started &= ~(STARTED_CU);
1642 scb_wrcbl(dev, CONF_LINK);
1643 scb_command(dev, SCB_CUstart);
1644 outb(0, ioaddr+SIGNAL_CA);
1645 }
1646 }
1647
1648
1649 /*
1650 * MODULE stuff
1651 */
1652
1653 #ifdef MODULE
1654
1655 #define EEXP_MAX_CARDS 4 /* max number of cards to support */
1656
1657 static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1658 static int irq[EEXP_MAX_CARDS];
1659 static int io[EEXP_MAX_CARDS];
1660
1661 module_param_array(io, int, NULL, 0);
1662 module_param_array(irq, int, NULL, 0);
1663 MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1664 MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1665 MODULE_LICENSE("GPL");
1666
1667
1668 /* Ideally the user would give us io=, irq= for every card. If any parameters
1669 * are specified, we verify and then use them. If no parameters are given, we
1670 * autoprobe for one card only.
1671 */
1672 int __init init_module(void)
1673 {
1674 struct net_device *dev;
1675 int this_dev, found = 0;
1676
1677 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1678 dev = alloc_etherdev(sizeof(struct net_local));
1679 dev->irq = irq[this_dev];
1680 dev->base_addr = io[this_dev];
1681 if (io[this_dev] == 0) {
1682 if (this_dev)
1683 break;
1684 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1685 }
1686 if (do_express_probe(dev) == 0) {
1687 dev_eexp[this_dev] = dev;
1688 found++;
1689 continue;
1690 }
1691 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1692 free_netdev(dev);
1693 break;
1694 }
1695 if (found)
1696 return 0;
1697 return -ENXIO;
1698 }
1699
1700 void __exit cleanup_module(void)
1701 {
1702 int this_dev;
1703
1704 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1705 struct net_device *dev = dev_eexp[this_dev];
1706 if (dev) {
1707 unregister_netdev(dev);
1708 free_netdev(dev);
1709 }
1710 }
1711 }
1712 #endif
1713
1714 /*
1715 * Local Variables:
1716 * c-file-style: "linux"
1717 * tab-width: 8
1718 * End:
1719 */
Linus' kernel tree