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[mirror_ubuntu-kernels.git] / drivers / net / eexpress.c
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@redhat.com>
12 * Added MCA support Adam Fritzler <mid@auk.cx>
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/slab.h>
115 #include <linux/mca-legacy.h>
116 #include <linux/spinlock.h>
117 #include <linux/bitops.h>
118 #include <linux/jiffies.h>
119
120 #include <asm/system.h>
121 #include <asm/io.h>
122 #include <asm/irq.h>
123
124 #ifndef NET_DEBUG
125 #define NET_DEBUG 4
126 #endif
127
128 #include "eexpress.h"
129
130 #define EEXP_IO_EXTENT 16
131
132 /*
133 * Private data declarations
134 */
135
136 struct net_local
137 {
138 struct net_device_stats stats;
139 unsigned long last_tx; /* jiffies when last transmit started */
140 unsigned long init_time; /* jiffies when eexp_hw_init586 called */
141 unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
142 unsigned short rx_last; /* last rx buf */
143 unsigned short rx_ptr; /* first rx buf to look at */
144 unsigned short tx_head; /* next free tx buf */
145 unsigned short tx_reap; /* first in-use tx buf */
146 unsigned short tx_tail; /* previous tx buf to tx_head */
147 unsigned short tx_link; /* last known-executing tx buf */
148 unsigned short last_tx_restart; /* set to tx_link when we
149 restart the CU */
150 unsigned char started;
151 unsigned short rx_buf_start;
152 unsigned short rx_buf_end;
153 unsigned short num_tx_bufs;
154 unsigned short num_rx_bufs;
155 unsigned char width; /* 0 for 16bit, 1 for 8bit */
156 unsigned char was_promisc;
157 unsigned char old_mc_count;
158 spinlock_t lock;
159 };
160
161 /* This is the code and data that is downloaded to the EtherExpress card's
162 * memory at boot time.
163 */
164
165 static unsigned short start_code[] = {
166 /* 0x0000 */
167 0x0001, /* ISCP: busy - cleared after reset */
168 0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */
169
170 0x0000,0x0000, /* SCB: status, commands */
171 0x0000,0x0000, /* links to first command block,
172 first receive descriptor */
173 0x0000,0x0000, /* CRC error, alignment error counts */
174 0x0000,0x0000, /* out of resources, overrun error counts */
175
176 0x0000,0x0000, /* pad */
177 0x0000,0x0000,
178
179 /* 0x20 -- start of 82586 CU program */
180 #define CONF_LINK 0x20
181 0x0000,Cmd_Config,
182 0x0032, /* link to next command */
183 0x080c, /* 12 bytes follow : fifo threshold=8 */
184 0x2e40, /* don't rx bad frames
185 * SRDY/ARDY => ext. sync. : preamble len=8
186 * take addresses from data buffers
187 * 6 bytes/address
188 */
189 0x6000, /* default backoff method & priority
190 * interframe spacing = 0x60 */
191 0xf200, /* slot time=0x200
192 * max collision retry = 0xf */
193 #define CONF_PROMISC 0x2e
194 0x0000, /* no HDLC : normal CRC : enable broadcast
195 * disable promiscuous/multicast modes */
196 0x003c, /* minimum frame length = 60 octets) */
197
198 0x0000,Cmd_SetAddr,
199 0x003e, /* link to next command */
200 #define CONF_HWADDR 0x38
201 0x0000,0x0000,0x0000, /* hardware address placed here */
202
203 0x0000,Cmd_MCast,
204 0x0076, /* link to next command */
205 #define CONF_NR_MULTICAST 0x44
206 0x0000, /* number of multicast addresses */
207 #define CONF_MULTICAST 0x46
208 0x0000, 0x0000, 0x0000, /* some addresses */
209 0x0000, 0x0000, 0x0000,
210 0x0000, 0x0000, 0x0000,
211 0x0000, 0x0000, 0x0000,
212 0x0000, 0x0000, 0x0000,
213 0x0000, 0x0000, 0x0000,
214 0x0000, 0x0000, 0x0000,
215 0x0000, 0x0000, 0x0000,
216
217 #define CONF_DIAG_RESULT 0x76
218 0x0000, Cmd_Diag,
219 0x007c, /* link to next command */
220
221 0x0000,Cmd_TDR|Cmd_INT,
222 0x0084,
223 #define CONF_TDR_RESULT 0x82
224 0x0000,
225
226 0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
227 0x0084 /* dummy link */
228 };
229
230 /* maps irq number to EtherExpress magic value */
231 static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
232
233 #ifdef CONFIG_MCA_LEGACY
234 /* mapping of the first four bits of the second POS register */
235 static unsigned short mca_iomap[] = {
236 0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
237 0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
238 };
239 /* bits 5-7 of the second POS register */
240 static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
241 #endif
242
243 /*
244 * Prototypes for Linux interface
245 */
246
247 static int eexp_open(struct net_device *dev);
248 static int eexp_close(struct net_device *dev);
249 static void eexp_timeout(struct net_device *dev);
250 static struct net_device_stats *eexp_stats(struct net_device *dev);
251 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
252
253 static irqreturn_t eexp_irq(int irq, void *dev_addr);
254 static void eexp_set_multicast(struct net_device *dev);
255
256 /*
257 * Prototypes for hardware access functions
258 */
259
260 static void eexp_hw_rx_pio(struct net_device *dev);
261 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
262 unsigned short len);
263 static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
264 static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
265 unsigned char location);
266
267 static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
268 static void eexp_hw_txrestart(struct net_device *dev);
269
270 static void eexp_hw_txinit (struct net_device *dev);
271 static void eexp_hw_rxinit (struct net_device *dev);
272
273 static void eexp_hw_init586 (struct net_device *dev);
274 static void eexp_setup_filter (struct net_device *dev);
275
276 static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
277 enum eexp_iftype {AUI=0, BNC=1, TPE=2};
278
279 #define STARTED_RU 2
280 #define STARTED_CU 1
281
282 /*
283 * Primitive hardware access functions.
284 */
285
286 static inline unsigned short scb_status(struct net_device *dev)
287 {
288 return inw(dev->base_addr + 0xc008);
289 }
290
291 static inline unsigned short scb_rdcmd(struct net_device *dev)
292 {
293 return inw(dev->base_addr + 0xc00a);
294 }
295
296 static inline void scb_command(struct net_device *dev, unsigned short cmd)
297 {
298 outw(cmd, dev->base_addr + 0xc00a);
299 }
300
301 static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
302 {
303 outw(val, dev->base_addr + 0xc00c);
304 }
305
306 static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
307 {
308 outw(val, dev->base_addr + 0xc00e);
309 }
310
311 static inline void set_loopback(struct net_device *dev)
312 {
313 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
314 }
315
316 static inline void clear_loopback(struct net_device *dev)
317 {
318 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
319 }
320
321 static inline unsigned short int SHADOW(short int addr)
322 {
323 addr &= 0x1f;
324 if (addr > 0xf) addr += 0x3ff0;
325 return addr + 0x4000;
326 }
327
328 /*
329 * Linux interface
330 */
331
332 /*
333 * checks for presence of EtherExpress card
334 */
335
336 static int __init do_express_probe(struct net_device *dev)
337 {
338 unsigned short *port;
339 static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
340 unsigned short ioaddr = dev->base_addr;
341 int dev_irq = dev->irq;
342 int err;
343
344 dev->if_port = 0xff; /* not set */
345
346 #ifdef CONFIG_MCA_LEGACY
347 if (MCA_bus) {
348 int slot = 0;
349
350 /*
351 * Only find one card at a time. Subsequent calls
352 * will find others, however, proper multicard MCA
353 * probing and setup can't be done with the
354 * old-style Space.c init routines. -- ASF
355 */
356 while (slot != MCA_NOTFOUND) {
357 int pos0, pos1;
358
359 slot = mca_find_unused_adapter(0x628B, slot);
360 if (slot == MCA_NOTFOUND)
361 break;
362
363 pos0 = mca_read_stored_pos(slot, 2);
364 pos1 = mca_read_stored_pos(slot, 3);
365 ioaddr = mca_iomap[pos1&0xf];
366
367 dev->irq = mca_irqmap[(pos1>>4)&0x7];
368
369 /*
370 * XXX: Transciever selection is done
371 * differently on the MCA version.
372 * How to get it to select something
373 * other than external/AUI is currently
374 * unknown. This code is just for looks. -- ASF
375 */
376 if ((pos0 & 0x7) == 0x1)
377 dev->if_port = AUI;
378 else if ((pos0 & 0x7) == 0x5) {
379 if (pos1 & 0x80)
380 dev->if_port = BNC;
381 else
382 dev->if_port = TPE;
383 }
384
385 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
386 mca_set_adapter_procfn(slot, NULL, dev);
387 mca_mark_as_used(slot);
388
389 break;
390 }
391 }
392 #endif
393 if (ioaddr&0xfe00) {
394 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
395 return -EBUSY;
396 err = eexp_hw_probe(dev,ioaddr);
397 release_region(ioaddr, EEXP_IO_EXTENT);
398 return err;
399 } else if (ioaddr)
400 return -ENXIO;
401
402 for (port=&ports[0] ; *port ; port++ )
403 {
404 unsigned short sum = 0;
405 int i;
406 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
407 continue;
408 for ( i=0 ; i<4 ; i++ )
409 {
410 unsigned short t;
411 t = inb(*port + ID_PORT);
412 sum |= (t>>4) << ((t & 0x03)<<2);
413 }
414 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
415 release_region(*port, EEXP_IO_EXTENT);
416 return 0;
417 }
418 release_region(*port, EEXP_IO_EXTENT);
419 dev->irq = dev_irq;
420 }
421 return -ENODEV;
422 }
423
424 #ifndef MODULE
425 struct net_device * __init express_probe(int unit)
426 {
427 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
428 int err;
429
430 if (!dev)
431 return ERR_PTR(-ENOMEM);
432
433 sprintf(dev->name, "eth%d", unit);
434 netdev_boot_setup_check(dev);
435
436 err = do_express_probe(dev);
437 if (!err)
438 return dev;
439 free_netdev(dev);
440 return ERR_PTR(err);
441 }
442 #endif
443
444 /*
445 * open and initialize the adapter, ready for use
446 */
447
448 static int eexp_open(struct net_device *dev)
449 {
450 int ret;
451 unsigned short ioaddr = dev->base_addr;
452 struct net_local *lp = netdev_priv(dev);
453
454 #if NET_DEBUG > 6
455 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
456 #endif
457
458 if (!dev->irq || !irqrmap[dev->irq])
459 return -ENXIO;
460
461 ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
462 if (ret) return ret;
463
464 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
465 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
466 , ioaddr);
467 goto err_out1;
468 }
469 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
470 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
471 , ioaddr+0x4000);
472 goto err_out2;
473 }
474 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
475 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
476 , ioaddr+0x8000);
477 goto err_out3;
478 }
479 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
480 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
481 , ioaddr+0xc000);
482 goto err_out4;
483 }
484
485 if (lp->width) {
486 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
487 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
488 }
489
490 eexp_hw_init586(dev);
491 netif_start_queue(dev);
492 #if NET_DEBUG > 6
493 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
494 #endif
495 return 0;
496
497 err_out4:
498 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
499 err_out3:
500 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
501 err_out2:
502 release_region(ioaddr, EEXP_IO_EXTENT);
503 err_out1:
504 free_irq(dev->irq, dev);
505 return -EBUSY;
506 }
507
508 /*
509 * close and disable the interface, leaving the 586 in reset.
510 */
511
512 static int eexp_close(struct net_device *dev)
513 {
514 unsigned short ioaddr = dev->base_addr;
515 struct net_local *lp = netdev_priv(dev);
516
517 int irq = dev->irq;
518
519 netif_stop_queue(dev);
520
521 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
522 lp->started = 0;
523 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
524 outb(0,ioaddr+SIGNAL_CA);
525 free_irq(irq,dev);
526 outb(i586_RST,ioaddr+EEPROM_Ctrl);
527 release_region(ioaddr, EEXP_IO_EXTENT);
528 release_region(ioaddr+0x4000, 16);
529 release_region(ioaddr+0x8000, 16);
530 release_region(ioaddr+0xc000, 16);
531
532 return 0;
533 }
534
535 /*
536 * Return interface stats
537 */
538
539 static struct net_device_stats *eexp_stats(struct net_device *dev)
540 {
541 struct net_local *lp = netdev_priv(dev);
542
543 return &lp->stats;
544 }
545
546 /*
547 * This gets called when a higher level thinks we are broken. Check that
548 * nothing has become jammed in the CU.
549 */
550
551 static void unstick_cu(struct net_device *dev)
552 {
553 struct net_local *lp = netdev_priv(dev);
554 unsigned short ioaddr = dev->base_addr;
555
556 if (lp->started)
557 {
558 if (time_after(jiffies, dev->trans_start + 50))
559 {
560 if (lp->tx_link==lp->last_tx_restart)
561 {
562 unsigned short boguscount=200,rsst;
563 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
564 dev->name, scb_status(dev));
565 eexp_hw_txinit(dev);
566 lp->last_tx_restart = 0;
567 scb_wrcbl(dev, lp->tx_link);
568 scb_command(dev, SCB_CUstart);
569 outb(0,ioaddr+SIGNAL_CA);
570 while (!SCB_complete(rsst=scb_status(dev)))
571 {
572 if (!--boguscount)
573 {
574 boguscount=200;
575 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
576 dev->name,rsst);
577 scb_wrcbl(dev, lp->tx_link);
578 scb_command(dev, SCB_CUstart);
579 outb(0,ioaddr+SIGNAL_CA);
580 }
581 }
582 netif_wake_queue(dev);
583 }
584 else
585 {
586 unsigned short status = scb_status(dev);
587 if (SCB_CUdead(status))
588 {
589 unsigned short txstatus = eexp_hw_lasttxstat(dev);
590 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
591 dev->name, status, txstatus);
592 eexp_hw_txrestart(dev);
593 }
594 else
595 {
596 unsigned short txstatus = eexp_hw_lasttxstat(dev);
597 if (netif_queue_stopped(dev) && !txstatus)
598 {
599 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
600 dev->name,status,txstatus);
601 eexp_hw_init586(dev);
602 netif_wake_queue(dev);
603 }
604 else
605 {
606 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
607 }
608 }
609 }
610 }
611 }
612 else
613 {
614 if (time_after(jiffies, lp->init_time + 10))
615 {
616 unsigned short status = scb_status(dev);
617 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
618 dev->name, status);
619 eexp_hw_init586(dev);
620 netif_wake_queue(dev);
621 }
622 }
623 }
624
625 static void eexp_timeout(struct net_device *dev)
626 {
627 struct net_local *lp = netdev_priv(dev);
628 #ifdef CONFIG_SMP
629 unsigned long flags;
630 #endif
631 int status;
632
633 disable_irq(dev->irq);
634
635 /*
636 * Best would be to use synchronize_irq(); spin_lock() here
637 * lets make it work first..
638 */
639
640 #ifdef CONFIG_SMP
641 spin_lock_irqsave(&lp->lock, flags);
642 #endif
643
644 status = scb_status(dev);
645 unstick_cu(dev);
646 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
647 (SCB_complete(status)?"lost interrupt":
648 "board on fire"));
649 lp->stats.tx_errors++;
650 lp->last_tx = jiffies;
651 if (!SCB_complete(status)) {
652 scb_command(dev, SCB_CUabort);
653 outb(0,dev->base_addr+SIGNAL_CA);
654 }
655 netif_wake_queue(dev);
656 #ifdef CONFIG_SMP
657 spin_unlock_irqrestore(&lp->lock, flags);
658 #endif
659 }
660
661 /*
662 * Called to transmit a packet, or to allow us to right ourselves
663 * if the kernel thinks we've died.
664 */
665 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
666 {
667 struct net_local *lp = netdev_priv(dev);
668 short length = buf->len;
669 #ifdef CONFIG_SMP
670 unsigned long flags;
671 #endif
672
673 #if NET_DEBUG > 6
674 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
675 #endif
676
677 if (buf->len < ETH_ZLEN) {
678 if (skb_padto(buf, ETH_ZLEN))
679 return 0;
680 length = ETH_ZLEN;
681 }
682
683 disable_irq(dev->irq);
684
685 /*
686 * Best would be to use synchronize_irq(); spin_lock() here
687 * lets make it work first..
688 */
689
690 #ifdef CONFIG_SMP
691 spin_lock_irqsave(&lp->lock, flags);
692 #endif
693
694 {
695 unsigned short *data = (unsigned short *)buf->data;
696
697 lp->stats.tx_bytes += length;
698
699 eexp_hw_tx_pio(dev,data,length);
700 }
701 dev_kfree_skb(buf);
702 #ifdef CONFIG_SMP
703 spin_unlock_irqrestore(&lp->lock, flags);
704 #endif
705 enable_irq(dev->irq);
706 return 0;
707 }
708
709 /*
710 * Handle an EtherExpress interrupt
711 * If we've finished initializing, start the RU and CU up.
712 * If we've already started, reap tx buffers, handle any received packets,
713 * check to make sure we've not become wedged.
714 */
715
716 static unsigned short eexp_start_irq(struct net_device *dev,
717 unsigned short status)
718 {
719 unsigned short ack_cmd = SCB_ack(status);
720 struct net_local *lp = netdev_priv(dev);
721 unsigned short ioaddr = dev->base_addr;
722 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
723 short diag_status, tdr_status;
724 while (SCB_CUstat(status)==2)
725 status = scb_status(dev);
726 #if NET_DEBUG > 4
727 printk("%s: CU went non-active (status %04x)\n",
728 dev->name, status);
729 #endif
730
731 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
732 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
733 if (diag_status & 1<<11) {
734 printk(KERN_WARNING "%s: 82586 failed self-test\n",
735 dev->name);
736 } else if (!(diag_status & 1<<13)) {
737 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
738 }
739
740 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
741 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
742 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
743 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" : "");
744 }
745 else if (tdr_status & TDR_XCVRPROBLEM) {
746 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
747 }
748 else if (tdr_status & TDR_LINKOK) {
749 #if NET_DEBUG > 4
750 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
751 #endif
752 } else {
753 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
754 tdr_status);
755 }
756
757 lp->started |= STARTED_CU;
758 scb_wrcbl(dev, lp->tx_link);
759 /* if the RU isn't running, start it now */
760 if (!(lp->started & STARTED_RU)) {
761 ack_cmd |= SCB_RUstart;
762 scb_wrrfa(dev, lp->rx_buf_start);
763 lp->rx_ptr = lp->rx_buf_start;
764 lp->started |= STARTED_RU;
765 }
766 ack_cmd |= SCB_CUstart | 0x2000;
767 }
768
769 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
770 lp->started|=STARTED_RU;
771
772 return ack_cmd;
773 }
774
775 static void eexp_cmd_clear(struct net_device *dev)
776 {
777 unsigned long int oldtime = jiffies;
778 while (scb_rdcmd(dev) && (time_before(jiffies, oldtime + 10)));
779 if (scb_rdcmd(dev)) {
780 printk("%s: command didn't clear\n", dev->name);
781 }
782 }
783
784 static irqreturn_t eexp_irq(int irq, void *dev_info)
785 {
786 struct net_device *dev = dev_info;
787 struct net_local *lp;
788 unsigned short ioaddr,status,ack_cmd;
789 unsigned short old_read_ptr, old_write_ptr;
790
791 lp = netdev_priv(dev);
792 ioaddr = dev->base_addr;
793
794 spin_lock(&lp->lock);
795
796 old_read_ptr = inw(ioaddr+READ_PTR);
797 old_write_ptr = inw(ioaddr+WRITE_PTR);
798
799 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
800
801
802 status = scb_status(dev);
803
804 #if NET_DEBUG > 4
805 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
806 #endif
807
808 if (lp->started == (STARTED_CU | STARTED_RU)) {
809
810 do {
811 eexp_cmd_clear(dev);
812
813 ack_cmd = SCB_ack(status);
814 scb_command(dev, ack_cmd);
815 outb(0,ioaddr+SIGNAL_CA);
816
817 eexp_cmd_clear(dev);
818
819 if (SCB_complete(status)) {
820 if (!eexp_hw_lasttxstat(dev)) {
821 printk("%s: tx interrupt but no status\n", dev->name);
822 }
823 }
824
825 if (SCB_rxdframe(status))
826 eexp_hw_rx_pio(dev);
827
828 status = scb_status(dev);
829 } while (status & 0xc000);
830
831 if (SCB_RUdead(status))
832 {
833 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
834 dev->name,status);
835 #if 0
836 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
837 outw(lp->cur_rfd, ioaddr+READ_PTR);
838 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
839 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
840 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
841 outw(rbd, ioaddr+READ_PTR);
842 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
843 outw(rbd+8, ioaddr+READ_PTR);
844 printk("[%04x]\n", inw(ioaddr+DATAPORT));
845 #endif
846 lp->stats.rx_errors++;
847 #if 1
848 eexp_hw_rxinit(dev);
849 #else
850 lp->cur_rfd = lp->first_rfd;
851 #endif
852 scb_wrrfa(dev, lp->rx_buf_start);
853 scb_command(dev, SCB_RUstart);
854 outb(0,ioaddr+SIGNAL_CA);
855 }
856 } else {
857 if (status & 0x8000)
858 ack_cmd = eexp_start_irq(dev, status);
859 else
860 ack_cmd = SCB_ack(status);
861 scb_command(dev, ack_cmd);
862 outb(0,ioaddr+SIGNAL_CA);
863 }
864
865 eexp_cmd_clear(dev);
866
867 outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
868
869 #if NET_DEBUG > 6
870 printk("%s: leaving eexp_irq()\n", dev->name);
871 #endif
872 outw(old_read_ptr, ioaddr+READ_PTR);
873 outw(old_write_ptr, ioaddr+WRITE_PTR);
874
875 spin_unlock(&lp->lock);
876 return IRQ_HANDLED;
877 }
878
879 /*
880 * Hardware access functions
881 */
882
883 /*
884 * Set the cable type to use.
885 */
886
887 static void eexp_hw_set_interface(struct net_device *dev)
888 {
889 unsigned char oldval = inb(dev->base_addr + 0x300e);
890 oldval &= ~0x82;
891 switch (dev->if_port) {
892 case TPE:
893 oldval |= 0x2;
894 case BNC:
895 oldval |= 0x80;
896 break;
897 }
898 outb(oldval, dev->base_addr+0x300e);
899 mdelay(20);
900 }
901
902 /*
903 * Check all the receive buffers, and hand any received packets
904 * to the upper levels. Basic sanity check on each frame
905 * descriptor, though we don't bother trying to fix broken ones.
906 */
907
908 static void eexp_hw_rx_pio(struct net_device *dev)
909 {
910 struct net_local *lp = netdev_priv(dev);
911 unsigned short rx_block = lp->rx_ptr;
912 unsigned short boguscount = lp->num_rx_bufs;
913 unsigned short ioaddr = dev->base_addr;
914 unsigned short status;
915
916 #if NET_DEBUG > 6
917 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
918 #endif
919
920 do {
921 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
922
923 outw(rx_block, ioaddr + READ_PTR);
924 status = inw(ioaddr + DATAPORT);
925
926 if (FD_Done(status))
927 {
928 rfd_cmd = inw(ioaddr + DATAPORT);
929 rx_next = inw(ioaddr + DATAPORT);
930 pbuf = inw(ioaddr + DATAPORT);
931
932 outw(pbuf, ioaddr + READ_PTR);
933 pkt_len = inw(ioaddr + DATAPORT);
934
935 if (rfd_cmd!=0x0000)
936 {
937 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
938 dev->name, rfd_cmd);
939 continue;
940 }
941 else if (pbuf!=rx_block+0x16)
942 {
943 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
944 dev->name, rx_block+0x16, pbuf);
945 continue;
946 }
947 else if ((pkt_len & 0xc000)!=0xc000)
948 {
949 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
950 dev->name, pkt_len & 0xc000);
951 continue;
952 }
953 else if (!FD_OK(status))
954 {
955 lp->stats.rx_errors++;
956 if (FD_CRC(status))
957 lp->stats.rx_crc_errors++;
958 if (FD_Align(status))
959 lp->stats.rx_frame_errors++;
960 if (FD_Resrc(status))
961 lp->stats.rx_fifo_errors++;
962 if (FD_DMA(status))
963 lp->stats.rx_over_errors++;
964 if (FD_Short(status))
965 lp->stats.rx_length_errors++;
966 }
967 else
968 {
969 struct sk_buff *skb;
970 pkt_len &= 0x3fff;
971 skb = dev_alloc_skb(pkt_len+16);
972 if (skb == NULL)
973 {
974 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
975 lp->stats.rx_dropped++;
976 break;
977 }
978 skb_reserve(skb, 2);
979 outw(pbuf+10, ioaddr+READ_PTR);
980 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
981 skb->protocol = eth_type_trans(skb,dev);
982 netif_rx(skb);
983 dev->last_rx = jiffies;
984 lp->stats.rx_packets++;
985 lp->stats.rx_bytes += pkt_len;
986 }
987 outw(rx_block, ioaddr+WRITE_PTR);
988 outw(0, ioaddr+DATAPORT);
989 outw(0, ioaddr+DATAPORT);
990 rx_block = rx_next;
991 }
992 } while (FD_Done(status) && boguscount--);
993 lp->rx_ptr = rx_block;
994 }
995
996 /*
997 * Hand a packet to the card for transmission
998 * If we get here, we MUST have already checked
999 * to make sure there is room in the transmit
1000 * buffer region.
1001 */
1002
1003 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
1004 unsigned short len)
1005 {
1006 struct net_local *lp = netdev_priv(dev);
1007 unsigned short ioaddr = dev->base_addr;
1008
1009 if (LOCKUP16 || lp->width) {
1010 /* Stop the CU so that there is no chance that it
1011 jumps off to a bogus address while we are writing the
1012 pointer to the next transmit packet in 8-bit mode --
1013 this eliminates the "CU wedged" errors in 8-bit mode.
1014 (Zoltan Szilagyi 10-12-96) */
1015 scb_command(dev, SCB_CUsuspend);
1016 outw(0xFFFF, ioaddr+SIGNAL_CA);
1017 }
1018
1019 outw(lp->tx_head, ioaddr + WRITE_PTR);
1020
1021 outw(0x0000, ioaddr + DATAPORT);
1022 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1023 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1024 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1025
1026 outw(0x0000, ioaddr + DATAPORT);
1027 outw(0x0000, ioaddr + DATAPORT);
1028 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1029
1030 outw(0x8000|len, ioaddr + DATAPORT);
1031 outw(-1, ioaddr + DATAPORT);
1032 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1033 outw(0, ioaddr + DATAPORT);
1034
1035 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1036
1037 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1038 outw(lp->tx_head, ioaddr + DATAPORT);
1039
1040 dev->trans_start = jiffies;
1041 lp->tx_tail = lp->tx_head;
1042 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1043 lp->tx_head = TX_BUF_START;
1044 else
1045 lp->tx_head += TX_BUF_SIZE;
1046 if (lp->tx_head != lp->tx_reap)
1047 netif_wake_queue(dev);
1048
1049 if (LOCKUP16 || lp->width) {
1050 /* Restart the CU so that the packet can actually
1051 be transmitted. (Zoltan Szilagyi 10-12-96) */
1052 scb_command(dev, SCB_CUresume);
1053 outw(0xFFFF, ioaddr+SIGNAL_CA);
1054 }
1055
1056 lp->stats.tx_packets++;
1057 lp->last_tx = jiffies;
1058 }
1059
1060 /*
1061 * Sanity check the suspected EtherExpress card
1062 * Read hardware address, reset card, size memory and initialize buffer
1063 * memory pointers. These are held in dev->priv, in case someone has more
1064 * than one card in a machine.
1065 */
1066
1067 static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1068 {
1069 unsigned short hw_addr[3];
1070 unsigned char buswidth;
1071 unsigned int memory_size;
1072 int i;
1073 unsigned short xsum = 0;
1074 struct net_local *lp = netdev_priv(dev);
1075
1076 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1077
1078 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1079 outb(0, ioaddr+EEPROM_Ctrl);
1080 udelay(500);
1081 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1082
1083 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1084 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1085 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1086
1087 /* Standard Address or Compaq LTE Address */
1088 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
1089 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1090 {
1091 printk(" rejected: invalid address %04x%04x%04x\n",
1092 hw_addr[2],hw_addr[1],hw_addr[0]);
1093 return -ENODEV;
1094 }
1095
1096 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1097 * though.
1098 */
1099 for (i = 0; i < 64; i++)
1100 xsum += eexp_hw_readeeprom(ioaddr, i);
1101 if (xsum != 0xbaba)
1102 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1103
1104 dev->base_addr = ioaddr;
1105 for ( i=0 ; i<6 ; i++ )
1106 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1107
1108 {
1109 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1110 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1111
1112 /* Use the IRQ from EEPROM if none was given */
1113 if (!dev->irq)
1114 dev->irq = irqmap[setupval>>13];
1115
1116 if (dev->if_port == 0xff) {
1117 dev->if_port = !(setupval & 0x1000) ? AUI :
1118 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1119 }
1120
1121 buswidth = !((setupval & 0x400) >> 10);
1122 }
1123
1124 memset(lp, 0, sizeof(struct net_local));
1125 spin_lock_init(&lp->lock);
1126
1127 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1128 eexp_ifmap[dev->if_port], buswidth?8:16);
1129
1130 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1131 return -EBUSY;
1132
1133 eexp_hw_set_interface(dev);
1134
1135 release_region(dev->base_addr + 0x300e, 1);
1136
1137 /* Find out how much RAM we have on the card */
1138 outw(0, dev->base_addr + WRITE_PTR);
1139 for (i = 0; i < 32768; i++)
1140 outw(0, dev->base_addr + DATAPORT);
1141
1142 for (memory_size = 0; memory_size < 64; memory_size++)
1143 {
1144 outw(memory_size<<10, dev->base_addr + READ_PTR);
1145 if (inw(dev->base_addr+DATAPORT))
1146 break;
1147 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1148 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1149 outw(memory_size<<10, dev->base_addr + READ_PTR);
1150 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1151 break;
1152 }
1153
1154 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1155 * of RAM to play with.
1156 */
1157 lp->num_tx_bufs = 4;
1158 lp->rx_buf_end = 0x3ff6;
1159 switch (memory_size)
1160 {
1161 case 64:
1162 lp->rx_buf_end += 0x4000;
1163 case 48:
1164 lp->num_tx_bufs += 4;
1165 lp->rx_buf_end += 0x4000;
1166 case 32:
1167 lp->rx_buf_end += 0x4000;
1168 case 16:
1169 printk(", %dk RAM)\n", memory_size);
1170 break;
1171 default:
1172 printk(") bad memory size (%dk).\n", memory_size);
1173 return -ENODEV;
1174 break;
1175 }
1176
1177 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1178 lp->width = buswidth;
1179
1180 dev->open = eexp_open;
1181 dev->stop = eexp_close;
1182 dev->hard_start_xmit = eexp_xmit;
1183 dev->get_stats = eexp_stats;
1184 dev->set_multicast_list = &eexp_set_multicast;
1185 dev->tx_timeout = eexp_timeout;
1186 dev->watchdog_timeo = 2*HZ;
1187
1188 return register_netdev(dev);
1189 }
1190
1191 /*
1192 * Read a word from the EtherExpress on-board serial EEPROM.
1193 * The EEPROM contains 64 words of 16 bits.
1194 */
1195 static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1196 unsigned char location)
1197 {
1198 unsigned short cmd = 0x180|(location&0x7f);
1199 unsigned short rval = 0,wval = EC_CS|i586_RST;
1200 int i;
1201
1202 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1203 for (i=0x100 ; i ; i>>=1 )
1204 {
1205 if (cmd&i)
1206 wval |= EC_Wr;
1207 else
1208 wval &= ~EC_Wr;
1209
1210 outb(wval,ioaddr+EEPROM_Ctrl);
1211 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1212 eeprom_delay();
1213 outb(wval,ioaddr+EEPROM_Ctrl);
1214 eeprom_delay();
1215 }
1216 wval &= ~EC_Wr;
1217 outb(wval,ioaddr+EEPROM_Ctrl);
1218 for (i=0x8000 ; i ; i>>=1 )
1219 {
1220 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1221 eeprom_delay();
1222 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1223 rval |= i;
1224 outb(wval,ioaddr+EEPROM_Ctrl);
1225 eeprom_delay();
1226 }
1227 wval &= ~EC_CS;
1228 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1229 eeprom_delay();
1230 outb(wval,ioaddr+EEPROM_Ctrl);
1231 eeprom_delay();
1232 return rval;
1233 }
1234
1235 /*
1236 * Reap tx buffers and return last transmit status.
1237 * if ==0 then either:
1238 * a) we're not transmitting anything, so why are we here?
1239 * b) we've died.
1240 * otherwise, Stat_Busy(return) means we've still got some packets
1241 * to transmit, Stat_Done(return) means our buffers should be empty
1242 * again
1243 */
1244
1245 static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1246 {
1247 struct net_local *lp = netdev_priv(dev);
1248 unsigned short tx_block = lp->tx_reap;
1249 unsigned short status;
1250
1251 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1252 return 0x0000;
1253
1254 do
1255 {
1256 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1257 status = inw(dev->base_addr + SHADOW(tx_block));
1258 if (!Stat_Done(status))
1259 {
1260 lp->tx_link = tx_block;
1261 return status;
1262 }
1263 else
1264 {
1265 lp->last_tx_restart = 0;
1266 lp->stats.collisions += Stat_NoColl(status);
1267 if (!Stat_OK(status))
1268 {
1269 char *whatsup = NULL;
1270 lp->stats.tx_errors++;
1271 if (Stat_Abort(status))
1272 lp->stats.tx_aborted_errors++;
1273 if (Stat_TNoCar(status)) {
1274 whatsup = "aborted, no carrier";
1275 lp->stats.tx_carrier_errors++;
1276 }
1277 if (Stat_TNoCTS(status)) {
1278 whatsup = "aborted, lost CTS";
1279 lp->stats.tx_carrier_errors++;
1280 }
1281 if (Stat_TNoDMA(status)) {
1282 whatsup = "FIFO underran";
1283 lp->stats.tx_fifo_errors++;
1284 }
1285 if (Stat_TXColl(status)) {
1286 whatsup = "aborted, too many collisions";
1287 lp->stats.tx_aborted_errors++;
1288 }
1289 if (whatsup)
1290 printk(KERN_INFO "%s: transmit %s\n",
1291 dev->name, whatsup);
1292 }
1293 else
1294 lp->stats.tx_packets++;
1295 }
1296 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1297 lp->tx_reap = tx_block = TX_BUF_START;
1298 else
1299 lp->tx_reap = tx_block += TX_BUF_SIZE;
1300 netif_wake_queue(dev);
1301 }
1302 while (lp->tx_reap != lp->tx_head);
1303
1304 lp->tx_link = lp->tx_tail + 0x08;
1305
1306 return status;
1307 }
1308
1309 /*
1310 * This should never happen. It is called when some higher routine detects
1311 * that the CU has stopped, to try to restart it from the last packet we knew
1312 * we were working on, or the idle loop if we had finished for the time.
1313 */
1314
1315 static void eexp_hw_txrestart(struct net_device *dev)
1316 {
1317 struct net_local *lp = netdev_priv(dev);
1318 unsigned short ioaddr = dev->base_addr;
1319
1320 lp->last_tx_restart = lp->tx_link;
1321 scb_wrcbl(dev, lp->tx_link);
1322 scb_command(dev, SCB_CUstart);
1323 outb(0,ioaddr+SIGNAL_CA);
1324
1325 {
1326 unsigned short boguscount=50,failcount=5;
1327 while (!scb_status(dev))
1328 {
1329 if (!--boguscount)
1330 {
1331 if (--failcount)
1332 {
1333 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1334 scb_wrcbl(dev, lp->tx_link);
1335 scb_command(dev, SCB_CUstart);
1336 outb(0,ioaddr+SIGNAL_CA);
1337 boguscount = 100;
1338 }
1339 else
1340 {
1341 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1342 eexp_hw_init586(dev);
1343 netif_wake_queue(dev);
1344 return;
1345 }
1346 }
1347 }
1348 }
1349 }
1350
1351 /*
1352 * Writes down the list of transmit buffers into card memory. Each
1353 * entry consists of an 82586 transmit command, followed by a jump
1354 * pointing to itself. When we want to transmit a packet, we write
1355 * the data into the appropriate transmit buffer and then modify the
1356 * preceding jump to point at the new transmit command. This means that
1357 * the 586 command unit is continuously active.
1358 */
1359
1360 static void eexp_hw_txinit(struct net_device *dev)
1361 {
1362 struct net_local *lp = netdev_priv(dev);
1363 unsigned short tx_block = TX_BUF_START;
1364 unsigned short curtbuf;
1365 unsigned short ioaddr = dev->base_addr;
1366
1367 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1368 {
1369 outw(tx_block, ioaddr + WRITE_PTR);
1370
1371 outw(0x0000, ioaddr + DATAPORT);
1372 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1373 outw(tx_block+0x08, ioaddr + DATAPORT);
1374 outw(tx_block+0x0e, ioaddr + DATAPORT);
1375
1376 outw(0x0000, ioaddr + DATAPORT);
1377 outw(0x0000, ioaddr + DATAPORT);
1378 outw(tx_block+0x08, ioaddr + DATAPORT);
1379
1380 outw(0x8000, ioaddr + DATAPORT);
1381 outw(-1, ioaddr + DATAPORT);
1382 outw(tx_block+0x16, ioaddr + DATAPORT);
1383 outw(0x0000, ioaddr + DATAPORT);
1384
1385 tx_block += TX_BUF_SIZE;
1386 }
1387 lp->tx_head = TX_BUF_START;
1388 lp->tx_reap = TX_BUF_START;
1389 lp->tx_tail = tx_block - TX_BUF_SIZE;
1390 lp->tx_link = lp->tx_tail + 0x08;
1391 lp->rx_buf_start = tx_block;
1392
1393 }
1394
1395 /*
1396 * Write the circular list of receive buffer descriptors to card memory.
1397 * The end of the list isn't marked, which means that the 82586 receive
1398 * unit will loop until buffers become available (this avoids it giving us
1399 * "out of resources" messages).
1400 */
1401
1402 static void eexp_hw_rxinit(struct net_device *dev)
1403 {
1404 struct net_local *lp = netdev_priv(dev);
1405 unsigned short rx_block = lp->rx_buf_start;
1406 unsigned short ioaddr = dev->base_addr;
1407
1408 lp->num_rx_bufs = 0;
1409 lp->rx_first = lp->rx_ptr = rx_block;
1410 do
1411 {
1412 lp->num_rx_bufs++;
1413
1414 outw(rx_block, ioaddr + WRITE_PTR);
1415
1416 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1417 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1418 outw(0xffff, ioaddr+DATAPORT);
1419
1420 outw(0x0000, ioaddr+DATAPORT);
1421 outw(0xdead, ioaddr+DATAPORT);
1422 outw(0xdead, ioaddr+DATAPORT);
1423 outw(0xdead, ioaddr+DATAPORT);
1424 outw(0xdead, ioaddr+DATAPORT);
1425 outw(0xdead, ioaddr+DATAPORT);
1426 outw(0xdead, ioaddr+DATAPORT);
1427
1428 outw(0x0000, ioaddr+DATAPORT);
1429 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1430 outw(rx_block + 0x20, ioaddr+DATAPORT);
1431 outw(0, ioaddr+DATAPORT);
1432 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1433
1434 lp->rx_last = rx_block;
1435 rx_block += RX_BUF_SIZE;
1436 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1437
1438
1439 /* Make first Rx frame descriptor point to first Rx buffer
1440 descriptor */
1441 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1442 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1443
1444 /* Close Rx frame descriptor ring */
1445 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1446 outw(lp->rx_first, ioaddr+DATAPORT);
1447
1448 /* Close Rx buffer descriptor ring */
1449 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1450 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1451
1452 }
1453
1454 /*
1455 * Un-reset the 586, and start the configuration sequence. We don't wait for
1456 * this to finish, but allow the interrupt handler to start the CU and RU for
1457 * us. We can't start the receive/transmission system up before we know that
1458 * the hardware is configured correctly.
1459 */
1460
1461 static void eexp_hw_init586(struct net_device *dev)
1462 {
1463 struct net_local *lp = netdev_priv(dev);
1464 unsigned short ioaddr = dev->base_addr;
1465 int i;
1466
1467 #if NET_DEBUG > 6
1468 printk("%s: eexp_hw_init586()\n", dev->name);
1469 #endif
1470
1471 lp->started = 0;
1472
1473 set_loopback(dev);
1474
1475 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1476
1477 /* Download the startup code */
1478 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1479 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1480 outw(0x0000, ioaddr + 0x8008);
1481 outw(0x0000, ioaddr + 0x800a);
1482 outw(0x0000, ioaddr + 0x800c);
1483 outw(0x0000, ioaddr + 0x800e);
1484
1485 for (i = 0; i < (sizeof(start_code)); i+=32) {
1486 int j;
1487 outw(i, ioaddr + SM_PTR);
1488 for (j = 0; j < 16; j+=2)
1489 outw(start_code[(i+j)/2],
1490 ioaddr+0x4000+j);
1491 for (j = 0; j < 16; j+=2)
1492 outw(start_code[(i+j+16)/2],
1493 ioaddr+0x8000+j);
1494 }
1495
1496 /* Do we want promiscuous mode or multicast? */
1497 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1498 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1499 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1500 ioaddr+SHADOW(CONF_PROMISC));
1501 lp->was_promisc = dev->flags & IFF_PROMISC;
1502 #if 0
1503 eexp_setup_filter(dev);
1504 #endif
1505
1506 /* Write our hardware address */
1507 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1508 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
1509 outw(((unsigned short *)dev->dev_addr)[1],
1510 ioaddr+SHADOW(CONF_HWADDR+2));
1511 outw(((unsigned short *)dev->dev_addr)[2],
1512 ioaddr+SHADOW(CONF_HWADDR+4));
1513
1514 eexp_hw_txinit(dev);
1515 eexp_hw_rxinit(dev);
1516
1517 outb(0,ioaddr+EEPROM_Ctrl);
1518 mdelay(5);
1519
1520 scb_command(dev, 0xf000);
1521 outb(0,ioaddr+SIGNAL_CA);
1522
1523 outw(0, ioaddr+SM_PTR);
1524
1525 {
1526 unsigned short rboguscount=50,rfailcount=5;
1527 while (inw(ioaddr+0x4000))
1528 {
1529 if (!--rboguscount)
1530 {
1531 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1532 dev->name);
1533 scb_command(dev, 0);
1534 outb(0,ioaddr+SIGNAL_CA);
1535 rboguscount = 100;
1536 if (!--rfailcount)
1537 {
1538 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1539 dev->name);
1540 return;
1541 }
1542 }
1543 }
1544 }
1545
1546 scb_wrcbl(dev, CONF_LINK);
1547 scb_command(dev, 0xf000|SCB_CUstart);
1548 outb(0,ioaddr+SIGNAL_CA);
1549
1550 {
1551 unsigned short iboguscount=50,ifailcount=5;
1552 while (!scb_status(dev))
1553 {
1554 if (!--iboguscount)
1555 {
1556 if (--ifailcount)
1557 {
1558 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1559 dev->name, scb_status(dev), scb_rdcmd(dev));
1560 scb_wrcbl(dev, CONF_LINK);
1561 scb_command(dev, 0xf000|SCB_CUstart);
1562 outb(0,ioaddr+SIGNAL_CA);
1563 iboguscount = 100;
1564 }
1565 else
1566 {
1567 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1568 return;
1569 }
1570 }
1571 }
1572 }
1573
1574 clear_loopback(dev);
1575 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1576
1577 lp->init_time = jiffies;
1578 #if NET_DEBUG > 6
1579 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1580 #endif
1581 return;
1582 }
1583
1584 static void eexp_setup_filter(struct net_device *dev)
1585 {
1586 struct dev_mc_list *dmi = dev->mc_list;
1587 unsigned short ioaddr = dev->base_addr;
1588 int count = dev->mc_count;
1589 int i;
1590 if (count > 8) {
1591 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1592 dev->name, count);
1593 count = 8;
1594 }
1595
1596 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1597 outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1598 for (i = 0; i < count; i++) {
1599 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1600 if (!dmi) {
1601 printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1602 break;
1603 }
1604 if (dmi->dmi_addrlen != ETH_ALEN) {
1605 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1606 continue;
1607 }
1608 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1609 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1610 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1611 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1612 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1613 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1614 }
1615 }
1616
1617 /*
1618 * Set or clear the multicast filter for this adaptor.
1619 */
1620 static void
1621 eexp_set_multicast(struct net_device *dev)
1622 {
1623 unsigned short ioaddr = dev->base_addr;
1624 struct net_local *lp = netdev_priv(dev);
1625 int kick = 0, i;
1626 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1627 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1628 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1629 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1630 ioaddr+SHADOW(CONF_PROMISC));
1631 lp->was_promisc = dev->flags & IFF_PROMISC;
1632 kick = 1;
1633 }
1634 if (!(dev->flags & IFF_PROMISC)) {
1635 eexp_setup_filter(dev);
1636 if (lp->old_mc_count != dev->mc_count) {
1637 kick = 1;
1638 lp->old_mc_count = dev->mc_count;
1639 }
1640 }
1641 if (kick) {
1642 unsigned long oj;
1643 scb_command(dev, SCB_CUsuspend);
1644 outb(0, ioaddr+SIGNAL_CA);
1645 outb(0, ioaddr+SIGNAL_CA);
1646 #if 0
1647 printk("%s: waiting for CU to go suspended\n", dev->name);
1648 #endif
1649 oj = jiffies;
1650 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1651 (time_before(jiffies, oj + 2000)));
1652 if (SCB_CUstat(scb_status(dev)) == 2)
1653 printk("%s: warning, CU didn't stop\n", dev->name);
1654 lp->started &= ~(STARTED_CU);
1655 scb_wrcbl(dev, CONF_LINK);
1656 scb_command(dev, SCB_CUstart);
1657 outb(0, ioaddr+SIGNAL_CA);
1658 }
1659 }
1660
1661
1662 /*
1663 * MODULE stuff
1664 */
1665
1666 #ifdef MODULE
1667
1668 #define EEXP_MAX_CARDS 4 /* max number of cards to support */
1669
1670 static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1671 static int irq[EEXP_MAX_CARDS];
1672 static int io[EEXP_MAX_CARDS];
1673
1674 module_param_array(io, int, NULL, 0);
1675 module_param_array(irq, int, NULL, 0);
1676 MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1677 MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1678 MODULE_LICENSE("GPL");
1679
1680
1681 /* Ideally the user would give us io=, irq= for every card. If any parameters
1682 * are specified, we verify and then use them. If no parameters are given, we
1683 * autoprobe for one card only.
1684 */
1685 int __init init_module(void)
1686 {
1687 struct net_device *dev;
1688 int this_dev, found = 0;
1689
1690 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1691 dev = alloc_etherdev(sizeof(struct net_local));
1692 dev->irq = irq[this_dev];
1693 dev->base_addr = io[this_dev];
1694 if (io[this_dev] == 0) {
1695 if (this_dev)
1696 break;
1697 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1698 }
1699 if (do_express_probe(dev) == 0) {
1700 dev_eexp[this_dev] = dev;
1701 found++;
1702 continue;
1703 }
1704 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1705 free_netdev(dev);
1706 break;
1707 }
1708 if (found)
1709 return 0;
1710 return -ENXIO;
1711 }
1712
1713 void __exit cleanup_module(void)
1714 {
1715 int this_dev;
1716
1717 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1718 struct net_device *dev = dev_eexp[this_dev];
1719 if (dev) {
1720 unregister_netdev(dev);
1721 free_netdev(dev);
1722 }
1723 }
1724 }
1725 #endif
1726
1727 /*
1728 * Local Variables:
1729 * c-file-style: "linux"
1730 * tab-width: 8
1731 * End:
1732 */
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