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-rw-r--r--drivers/net/eexpress.c1752
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diff --git a/drivers/net/eexpress.c b/drivers/net/eexpress.c
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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/config.h>
101#include <linux/module.h>
102#include <linux/kernel.h>
103#include <linux/types.h>
104#include <linux/fcntl.h>
105#include <linux/interrupt.h>
106#include <linux/ioport.h>
107#include <linux/string.h>
108#include <linux/in.h>
109#include <linux/delay.h>
110#include <linux/errno.h>
111#include <linux/init.h>
112#include <linux/netdevice.h>
113#include <linux/etherdevice.h>
114#include <linux/skbuff.h>
115#include <linux/slab.h>
116#include <linux/mca-legacy.h>
117#include <linux/spinlock.h>
118#include <linux/bitops.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
136struct 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
165static 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 */
231static 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 */
235static 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 */
240static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
241#endif
242
243/*
244 * Prototypes for Linux interface
245 */
246
247static int eexp_open(struct net_device *dev);
248static int eexp_close(struct net_device *dev);
249static void eexp_timeout(struct net_device *dev);
250static struct net_device_stats *eexp_stats(struct net_device *dev);
251static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
252
253static irqreturn_t eexp_irq(int irq, void *dev_addr, struct pt_regs *regs);
254static void eexp_set_multicast(struct net_device *dev);
255
256/*
257 * Prototypes for hardware access functions
258 */
259
260static void eexp_hw_rx_pio(struct net_device *dev);
261static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
262 unsigned short len);
263static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
264static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
265 unsigned char location);
266
267static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
268static void eexp_hw_txrestart(struct net_device *dev);
269
270static void eexp_hw_txinit (struct net_device *dev);
271static void eexp_hw_rxinit (struct net_device *dev);
272
273static void eexp_hw_init586 (struct net_device *dev);
274static void eexp_setup_filter (struct net_device *dev);
275
276static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
277enum 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
286static inline unsigned short scb_status(struct net_device *dev)
287{
288 return inw(dev->base_addr + 0xc008);
289}
290
291static inline unsigned short scb_rdcmd(struct net_device *dev)
292{
293 return inw(dev->base_addr + 0xc00a);
294}
295
296static inline void scb_command(struct net_device *dev, unsigned short cmd)
297{
298 outw(cmd, dev->base_addr + 0xc00a);
299}
300
301static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
302{
303 outw(val, dev->base_addr + 0xc00c);
304}
305
306static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
307{
308 outw(val, dev->base_addr + 0xc00e);
309}
310
311static inline void set_loopback(struct net_device *dev)
312{
313 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
314}
315
316static inline void clear_loopback(struct net_device *dev)
317{
318 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
319}
320
321static 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
336static 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 SET_MODULE_OWNER(dev);
345
346 dev->if_port = 0xff; /* not set */
347
348#ifdef CONFIG_MCA_LEGACY
349 if (MCA_bus) {
350 int slot = 0;
351
352 /*
353 * Only find one card at a time. Subsequent calls
354 * will find others, however, proper multicard MCA
355 * probing and setup can't be done with the
356 * old-style Space.c init routines. -- ASF
357 */
358 while (slot != MCA_NOTFOUND) {
359 int pos0, pos1;
360
361 slot = mca_find_unused_adapter(0x628B, slot);
362 if (slot == MCA_NOTFOUND)
363 break;
364
365 pos0 = mca_read_stored_pos(slot, 2);
366 pos1 = mca_read_stored_pos(slot, 3);
367 ioaddr = mca_iomap[pos1&0xf];
368
369 dev->irq = mca_irqmap[(pos1>>4)&0x7];
370
371 /*
372 * XXX: Transciever selection is done
373 * differently on the MCA version.
374 * How to get it to select something
375 * other than external/AUI is currently
376 * unknown. This code is just for looks. -- ASF
377 */
378 if ((pos0 & 0x7) == 0x1)
379 dev->if_port = AUI;
380 else if ((pos0 & 0x7) == 0x5) {
381 if (pos1 & 0x80)
382 dev->if_port = BNC;
383 else
384 dev->if_port = TPE;
385 }
386
387 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
388 mca_set_adapter_procfn(slot, NULL, dev);
389 mca_mark_as_used(slot);
390
391 break;
392 }
393 }
394#endif
395 if (ioaddr&0xfe00) {
396 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
397 return -EBUSY;
398 err = eexp_hw_probe(dev,ioaddr);
399 release_region(ioaddr, EEXP_IO_EXTENT);
400 return err;
401 } else if (ioaddr)
402 return -ENXIO;
403
404 for (port=&ports[0] ; *port ; port++ )
405 {
406 unsigned short sum = 0;
407 int i;
408 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
409 continue;
410 for ( i=0 ; i<4 ; i++ )
411 {
412 unsigned short t;
413 t = inb(*port + ID_PORT);
414 sum |= (t>>4) << ((t & 0x03)<<2);
415 }
416 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
417 release_region(*port, EEXP_IO_EXTENT);
418 return 0;
419 }
420 release_region(*port, EEXP_IO_EXTENT);
421 dev->irq = dev_irq;
422 }
423 return -ENODEV;
424}
425
426#ifndef MODULE
427struct net_device * __init express_probe(int unit)
428{
429 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
430 int err;
431
432 if (!dev)
433 return ERR_PTR(-ENOMEM);
434
435 sprintf(dev->name, "eth%d", unit);
436 netdev_boot_setup_check(dev);
437
438 err = do_express_probe(dev);
439 if (!err) {
440 err = register_netdev(dev);
441 if (!err)
442 return dev;
443 }
444 free_netdev(dev);
445 return ERR_PTR(err);
446}
447#endif
448
449/*
450 * open and initialize the adapter, ready for use
451 */
452
453static int eexp_open(struct net_device *dev)
454{
455 int ret;
456 unsigned short ioaddr = dev->base_addr;
457 struct net_local *lp = netdev_priv(dev);
458
459#if NET_DEBUG > 6
460 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
461#endif
462
463 if (!dev->irq || !irqrmap[dev->irq])
464 return -ENXIO;
465
466 ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
467 if (ret) return ret;
468
469 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
470 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
471 , ioaddr);
472 goto err_out1;
473 }
474 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
475 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
476 , ioaddr+0x4000);
477 goto err_out2;
478 }
479 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
480 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
481 , ioaddr+0x8000);
482 goto err_out3;
483 }
484 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
485 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
486 , ioaddr+0xc000);
487 goto err_out4;
488 }
489
490 if (lp->width) {
491 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
492 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
493 }
494
495 eexp_hw_init586(dev);
496 netif_start_queue(dev);
497#if NET_DEBUG > 6
498 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
499#endif
500 return 0;
501
502 err_out4:
503 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
504 err_out3:
505 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
506 err_out2:
507 release_region(ioaddr, EEXP_IO_EXTENT);
508 err_out1:
509 free_irq(dev->irq, dev);
510 return -EBUSY;
511}
512
513/*
514 * close and disable the interface, leaving the 586 in reset.
515 */
516
517static int eexp_close(struct net_device *dev)
518{
519 unsigned short ioaddr = dev->base_addr;
520 struct net_local *lp = netdev_priv(dev);
521
522 int irq = dev->irq;
523
524 netif_stop_queue(dev);
525
526 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
527 lp->started = 0;
528 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
529 outb(0,ioaddr+SIGNAL_CA);
530 free_irq(irq,dev);
531 outb(i586_RST,ioaddr+EEPROM_Ctrl);
532 release_region(ioaddr, EEXP_IO_EXTENT);
533 release_region(ioaddr+0x4000, 16);
534 release_region(ioaddr+0x8000, 16);
535 release_region(ioaddr+0xc000, 16);
536
537 return 0;
538}
539
540/*
541 * Return interface stats
542 */
543
544static struct net_device_stats *eexp_stats(struct net_device *dev)
545{
546 struct net_local *lp = netdev_priv(dev);
547
548 return &lp->stats;
549}
550
551/*
552 * This gets called when a higher level thinks we are broken. Check that
553 * nothing has become jammed in the CU.
554 */
555
556static void unstick_cu(struct net_device *dev)
557{
558 struct net_local *lp = netdev_priv(dev);
559 unsigned short ioaddr = dev->base_addr;
560
561 if (lp->started)
562 {
563 if ((jiffies - dev->trans_start)>50)
564 {
565 if (lp->tx_link==lp->last_tx_restart)
566 {
567 unsigned short boguscount=200,rsst;
568 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
569 dev->name, scb_status(dev));
570 eexp_hw_txinit(dev);
571 lp->last_tx_restart = 0;
572 scb_wrcbl(dev, lp->tx_link);
573 scb_command(dev, SCB_CUstart);
574 outb(0,ioaddr+SIGNAL_CA);
575 while (!SCB_complete(rsst=scb_status(dev)))
576 {
577 if (!--boguscount)
578 {
579 boguscount=200;
580 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
581 dev->name,rsst);
582 scb_wrcbl(dev, lp->tx_link);
583 scb_command(dev, SCB_CUstart);
584 outb(0,ioaddr+SIGNAL_CA);
585 }
586 }
587 netif_wake_queue(dev);
588 }
589 else
590 {
591 unsigned short status = scb_status(dev);
592 if (SCB_CUdead(status))
593 {
594 unsigned short txstatus = eexp_hw_lasttxstat(dev);
595 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
596 dev->name, status, txstatus);
597 eexp_hw_txrestart(dev);
598 }
599 else
600 {
601 unsigned short txstatus = eexp_hw_lasttxstat(dev);
602 if (netif_queue_stopped(dev) && !txstatus)
603 {
604 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
605 dev->name,status,txstatus);
606 eexp_hw_init586(dev);
607 netif_wake_queue(dev);
608 }
609 else
610 {
611 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
612 }
613 }
614 }
615 }
616 }
617 else
618 {
619 if ((jiffies-lp->init_time)>10)
620 {
621 unsigned short status = scb_status(dev);
622 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
623 dev->name, status);
624 eexp_hw_init586(dev);
625 netif_wake_queue(dev);
626 }
627 }
628}
629
630static void eexp_timeout(struct net_device *dev)
631{
632 struct net_local *lp = netdev_priv(dev);
633#ifdef CONFIG_SMP
634 unsigned long flags;
635#endif
636 int status;
637
638 disable_irq(dev->irq);
639
640 /*
641 * Best would be to use synchronize_irq(); spin_lock() here
642 * lets make it work first..
643 */
644
645#ifdef CONFIG_SMP
646 spin_lock_irqsave(&lp->lock, flags);
647#endif
648
649 status = scb_status(dev);
650 unstick_cu(dev);
651 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
652 (SCB_complete(status)?"lost interrupt":
653 "board on fire"));
654 lp->stats.tx_errors++;
655 lp->last_tx = jiffies;
656 if (!SCB_complete(status)) {
657 scb_command(dev, SCB_CUabort);
658 outb(0,dev->base_addr+SIGNAL_CA);
659 }
660 netif_wake_queue(dev);
661#ifdef CONFIG_SMP
662 spin_unlock_irqrestore(&lp->lock, flags);
663#endif
664}
665
666/*
667 * Called to transmit a packet, or to allow us to right ourselves
668 * if the kernel thinks we've died.
669 */
670static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
671{
672 struct net_local *lp = netdev_priv(dev);
673 short length = buf->len;
674#ifdef CONFIG_SMP
675 unsigned long flags;
676#endif
677
678#if NET_DEBUG > 6
679 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
680#endif
681
682 if (buf->len < ETH_ZLEN) {
683 buf = skb_padto(buf, ETH_ZLEN);
684 if (buf == NULL)
685 return 0;
686 length = ETH_ZLEN;
687 }
688
689 disable_irq(dev->irq);
690
691 /*
692 * Best would be to use synchronize_irq(); spin_lock() here
693 * lets make it work first..
694 */
695
696#ifdef CONFIG_SMP
697 spin_lock_irqsave(&lp->lock, flags);
698#endif
699
700 {
701 unsigned short *data = (unsigned short *)buf->data;
702
703 lp->stats.tx_bytes += length;
704
705 eexp_hw_tx_pio(dev,data,length);
706 }
707 dev_kfree_skb(buf);
708#ifdef CONFIG_SMP
709 spin_unlock_irqrestore(&lp->lock, flags);
710#endif
711 enable_irq(dev->irq);
712 return 0;
713}
714
715/*
716 * Handle an EtherExpress interrupt
717 * If we've finished initializing, start the RU and CU up.
718 * If we've already started, reap tx buffers, handle any received packets,
719 * check to make sure we've not become wedged.
720 */
721
722/*
723 * Handle an EtherExpress interrupt
724 * If we've finished initializing, start the RU and CU up.
725 * If we've already started, reap tx buffers, handle any received packets,
726 * check to make sure we've not become wedged.
727 */
728
729static unsigned short eexp_start_irq(struct net_device *dev,
730 unsigned short status)
731{
732 unsigned short ack_cmd = SCB_ack(status);
733 struct net_local *lp = netdev_priv(dev);
734 unsigned short ioaddr = dev->base_addr;
735 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
736 short diag_status, tdr_status;
737 while (SCB_CUstat(status)==2)
738 status = scb_status(dev);
739#if NET_DEBUG > 4
740 printk("%s: CU went non-active (status %04x)\n",
741 dev->name, status);
742#endif
743
744 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
745 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
746 if (diag_status & 1<<11) {
747 printk(KERN_WARNING "%s: 82586 failed self-test\n",
748 dev->name);
749 } else if (!(diag_status & 1<<13)) {
750 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
751 }
752
753 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
754 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
755 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
756 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" : "");
757 }
758 else if (tdr_status & TDR_XCVRPROBLEM) {
759 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
760 }
761 else if (tdr_status & TDR_LINKOK) {
762#if NET_DEBUG > 4
763 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
764#endif
765 } else {
766 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
767 tdr_status);
768 }
769
770 lp->started |= STARTED_CU;
771 scb_wrcbl(dev, lp->tx_link);
772 /* if the RU isn't running, start it now */
773 if (!(lp->started & STARTED_RU)) {
774 ack_cmd |= SCB_RUstart;
775 scb_wrrfa(dev, lp->rx_buf_start);
776 lp->rx_ptr = lp->rx_buf_start;
777 lp->started |= STARTED_RU;
778 }
779 ack_cmd |= SCB_CUstart | 0x2000;
780 }
781
782 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
783 lp->started|=STARTED_RU;
784
785 return ack_cmd;
786}
787
788static void eexp_cmd_clear(struct net_device *dev)
789{
790 unsigned long int oldtime = jiffies;
791 while (scb_rdcmd(dev) && ((jiffies-oldtime)<10));
792 if (scb_rdcmd(dev)) {
793 printk("%s: command didn't clear\n", dev->name);
794 }
795}
796
797static irqreturn_t eexp_irq(int irq, void *dev_info, struct pt_regs *regs)
798{
799 struct net_device *dev = dev_info;
800 struct net_local *lp;
801 unsigned short ioaddr,status,ack_cmd;
802 unsigned short old_read_ptr, old_write_ptr;
803
804 if (dev==NULL)
805 {
806 printk(KERN_WARNING "eexpress: irq %d for unknown device\n",
807 irq);
808 return IRQ_NONE;
809 }
810
811 lp = netdev_priv(dev);
812 ioaddr = dev->base_addr;
813
814 spin_lock(&lp->lock);
815
816 old_read_ptr = inw(ioaddr+READ_PTR);
817 old_write_ptr = inw(ioaddr+WRITE_PTR);
818
819 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
820
821
822 status = scb_status(dev);
823
824#if NET_DEBUG > 4
825 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
826#endif
827
828 if (lp->started == (STARTED_CU | STARTED_RU)) {
829
830 do {
831 eexp_cmd_clear(dev);
832
833 ack_cmd = SCB_ack(status);
834 scb_command(dev, ack_cmd);
835 outb(0,ioaddr+SIGNAL_CA);
836
837 eexp_cmd_clear(dev);
838
839 if (SCB_complete(status)) {
840 if (!eexp_hw_lasttxstat(dev)) {
841 printk("%s: tx interrupt but no status\n", dev->name);
842 }
843 }
844
845 if (SCB_rxdframe(status))
846 eexp_hw_rx_pio(dev);
847
848 status = scb_status(dev);
849 } while (status & 0xc000);
850
851 if (SCB_RUdead(status))
852 {
853 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
854 dev->name,status);
855#if 0
856 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
857 outw(lp->cur_rfd, ioaddr+READ_PTR);
858 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
859 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
860 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
861 outw(rbd, ioaddr+READ_PTR);
862 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
863 outw(rbd+8, ioaddr+READ_PTR);
864 printk("[%04x]\n", inw(ioaddr+DATAPORT));
865#endif
866 lp->stats.rx_errors++;
867#if 1
868 eexp_hw_rxinit(dev);
869#else
870 lp->cur_rfd = lp->first_rfd;
871#endif
872 scb_wrrfa(dev, lp->rx_buf_start);
873 scb_command(dev, SCB_RUstart);
874 outb(0,ioaddr+SIGNAL_CA);
875 }
876 } else {
877 if (status & 0x8000)
878 ack_cmd = eexp_start_irq(dev, status);
879 else
880 ack_cmd = SCB_ack(status);
881 scb_command(dev, ack_cmd);
882 outb(0,ioaddr+SIGNAL_CA);
883 }
884
885 eexp_cmd_clear(dev);
886
887 outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
888
889#if NET_DEBUG > 6
890 printk("%s: leaving eexp_irq()\n", dev->name);
891#endif
892 outw(old_read_ptr, ioaddr+READ_PTR);
893 outw(old_write_ptr, ioaddr+WRITE_PTR);
894
895 spin_unlock(&lp->lock);
896 return IRQ_HANDLED;
897}
898
899/*
900 * Hardware access functions
901 */
902
903/*
904 * Set the cable type to use.
905 */
906
907static void eexp_hw_set_interface(struct net_device *dev)
908{
909 unsigned char oldval = inb(dev->base_addr + 0x300e);
910 oldval &= ~0x82;
911 switch (dev->if_port) {
912 case TPE:
913 oldval |= 0x2;
914 case BNC:
915 oldval |= 0x80;
916 break;
917 }
918 outb(oldval, dev->base_addr+0x300e);
919 mdelay(20);
920}
921
922/*
923 * Check all the receive buffers, and hand any received packets
924 * to the upper levels. Basic sanity check on each frame
925 * descriptor, though we don't bother trying to fix broken ones.
926 */
927
928static void eexp_hw_rx_pio(struct net_device *dev)
929{
930 struct net_local *lp = netdev_priv(dev);
931 unsigned short rx_block = lp->rx_ptr;
932 unsigned short boguscount = lp->num_rx_bufs;
933 unsigned short ioaddr = dev->base_addr;
934 unsigned short status;
935
936#if NET_DEBUG > 6
937 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
938#endif
939
940 do {
941 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
942
943 outw(rx_block, ioaddr + READ_PTR);
944 status = inw(ioaddr + DATAPORT);
945
946 if (FD_Done(status))
947 {
948 rfd_cmd = inw(ioaddr + DATAPORT);
949 rx_next = inw(ioaddr + DATAPORT);
950 pbuf = inw(ioaddr + DATAPORT);
951
952 outw(pbuf, ioaddr + READ_PTR);
953 pkt_len = inw(ioaddr + DATAPORT);
954
955 if (rfd_cmd!=0x0000)
956 {
957 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
958 dev->name, rfd_cmd);
959 continue;
960 }
961 else if (pbuf!=rx_block+0x16)
962 {
963 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
964 dev->name, rx_block+0x16, pbuf);
965 continue;
966 }
967 else if ((pkt_len & 0xc000)!=0xc000)
968 {
969 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
970 dev->name, pkt_len & 0xc000);
971 continue;
972 }
973 else if (!FD_OK(status))
974 {
975 lp->stats.rx_errors++;
976 if (FD_CRC(status))
977 lp->stats.rx_crc_errors++;
978 if (FD_Align(status))
979 lp->stats.rx_frame_errors++;
980 if (FD_Resrc(status))
981 lp->stats.rx_fifo_errors++;
982 if (FD_DMA(status))
983 lp->stats.rx_over_errors++;
984 if (FD_Short(status))
985 lp->stats.rx_length_errors++;
986 }
987 else
988 {
989 struct sk_buff *skb;
990 pkt_len &= 0x3fff;
991 skb = dev_alloc_skb(pkt_len+16);
992 if (skb == NULL)
993 {
994 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
995 lp->stats.rx_dropped++;
996 break;
997 }
998 skb->dev = dev;
999 skb_reserve(skb, 2);
1000 outw(pbuf+10, ioaddr+READ_PTR);
1001 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
1002 skb->protocol = eth_type_trans(skb,dev);
1003 netif_rx(skb);
1004 dev->last_rx = jiffies;
1005 lp->stats.rx_packets++;
1006 lp->stats.rx_bytes += pkt_len;
1007 }
1008 outw(rx_block, ioaddr+WRITE_PTR);
1009 outw(0, ioaddr+DATAPORT);
1010 outw(0, ioaddr+DATAPORT);
1011 rx_block = rx_next;
1012 }
1013 } while (FD_Done(status) && boguscount--);
1014 lp->rx_ptr = rx_block;
1015}
1016
1017/*
1018 * Hand a packet to the card for transmission
1019 * If we get here, we MUST have already checked
1020 * to make sure there is room in the transmit
1021 * buffer region.
1022 */
1023
1024static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
1025 unsigned short len)
1026{
1027 struct net_local *lp = netdev_priv(dev);
1028 unsigned short ioaddr = dev->base_addr;
1029
1030 if (LOCKUP16 || lp->width) {
1031 /* Stop the CU so that there is no chance that it
1032 jumps off to a bogus address while we are writing the
1033 pointer to the next transmit packet in 8-bit mode --
1034 this eliminates the "CU wedged" errors in 8-bit mode.
1035 (Zoltan Szilagyi 10-12-96) */
1036 scb_command(dev, SCB_CUsuspend);
1037 outw(0xFFFF, ioaddr+SIGNAL_CA);
1038 }
1039
1040 outw(lp->tx_head, ioaddr + WRITE_PTR);
1041
1042 outw(0x0000, ioaddr + DATAPORT);
1043 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1044 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1045 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1046
1047 outw(0x0000, ioaddr + DATAPORT);
1048 outw(0x0000, ioaddr + DATAPORT);
1049 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1050
1051 outw(0x8000|len, ioaddr + DATAPORT);
1052 outw(-1, ioaddr + DATAPORT);
1053 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1054 outw(0, ioaddr + DATAPORT);
1055
1056 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1057
1058 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1059 outw(lp->tx_head, ioaddr + DATAPORT);
1060
1061 dev->trans_start = jiffies;
1062 lp->tx_tail = lp->tx_head;
1063 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1064 lp->tx_head = TX_BUF_START;
1065 else
1066 lp->tx_head += TX_BUF_SIZE;
1067 if (lp->tx_head != lp->tx_reap)
1068 netif_wake_queue(dev);
1069
1070 if (LOCKUP16 || lp->width) {
1071 /* Restart the CU so that the packet can actually
1072 be transmitted. (Zoltan Szilagyi 10-12-96) */
1073 scb_command(dev, SCB_CUresume);
1074 outw(0xFFFF, ioaddr+SIGNAL_CA);
1075 }
1076
1077 lp->stats.tx_packets++;
1078 lp->last_tx = jiffies;
1079}
1080
1081/*
1082 * Sanity check the suspected EtherExpress card
1083 * Read hardware address, reset card, size memory and initialize buffer
1084 * memory pointers. These are held in dev->priv, in case someone has more
1085 * than one card in a machine.
1086 */
1087
1088static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1089{
1090 unsigned short hw_addr[3];
1091 unsigned char buswidth;
1092 unsigned int memory_size;
1093 int i;
1094 unsigned short xsum = 0;
1095 struct net_local *lp = netdev_priv(dev);
1096
1097 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1098
1099 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1100 outb(0, ioaddr+EEPROM_Ctrl);
1101 udelay(500);
1102 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1103
1104 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1105 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1106 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1107
1108 /* Standard Address or Compaq LTE Address */
1109 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
1110 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1111 {
1112 printk(" rejected: invalid address %04x%04x%04x\n",
1113 hw_addr[2],hw_addr[1],hw_addr[0]);
1114 return -ENODEV;
1115 }
1116
1117 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1118 * though.
1119 */
1120 for (i = 0; i < 64; i++)
1121 xsum += eexp_hw_readeeprom(ioaddr, i);
1122 if (xsum != 0xbaba)
1123 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1124
1125 dev->base_addr = ioaddr;
1126 for ( i=0 ; i<6 ; i++ )
1127 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1128
1129 {
1130 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1131 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1132
1133 /* Use the IRQ from EEPROM if none was given */
1134 if (!dev->irq)
1135 dev->irq = irqmap[setupval>>13];
1136
1137 if (dev->if_port == 0xff) {
1138 dev->if_port = !(setupval & 0x1000) ? AUI :
1139 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1140 }
1141
1142 buswidth = !((setupval & 0x400) >> 10);
1143 }
1144
1145 memset(lp, 0, sizeof(struct net_local));
1146 spin_lock_init(&lp->lock);
1147
1148 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1149 eexp_ifmap[dev->if_port], buswidth?8:16);
1150
1151 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1152 return -EBUSY;
1153
1154 eexp_hw_set_interface(dev);
1155
1156 release_region(dev->base_addr + 0x300e, 1);
1157
1158 /* Find out how much RAM we have on the card */
1159 outw(0, dev->base_addr + WRITE_PTR);
1160 for (i = 0; i < 32768; i++)
1161 outw(0, dev->base_addr + DATAPORT);
1162
1163 for (memory_size = 0; memory_size < 64; memory_size++)
1164 {
1165 outw(memory_size<<10, dev->base_addr + READ_PTR);
1166 if (inw(dev->base_addr+DATAPORT))
1167 break;
1168 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1169 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1170 outw(memory_size<<10, dev->base_addr + READ_PTR);
1171 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1172 break;
1173 }
1174
1175 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1176 * of RAM to play with.
1177 */
1178 lp->num_tx_bufs = 4;
1179 lp->rx_buf_end = 0x3ff6;
1180 switch (memory_size)
1181 {
1182 case 64:
1183 lp->rx_buf_end += 0x4000;
1184 case 48:
1185 lp->num_tx_bufs += 4;
1186 lp->rx_buf_end += 0x4000;
1187 case 32:
1188 lp->rx_buf_end += 0x4000;
1189 case 16:
1190 printk(", %dk RAM)\n", memory_size);
1191 break;
1192 default:
1193 printk(") bad memory size (%dk).\n", memory_size);
1194 return -ENODEV;
1195 break;
1196 }
1197
1198 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1199 lp->width = buswidth;
1200
1201 dev->open = eexp_open;
1202 dev->stop = eexp_close;
1203 dev->hard_start_xmit = eexp_xmit;
1204 dev->get_stats = eexp_stats;
1205 dev->set_multicast_list = &eexp_set_multicast;
1206 dev->tx_timeout = eexp_timeout;
1207 dev->watchdog_timeo = 2*HZ;
1208 return 0;
1209}
1210
1211/*
1212 * Read a word from the EtherExpress on-board serial EEPROM.
1213 * The EEPROM contains 64 words of 16 bits.
1214 */
1215static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1216 unsigned char location)
1217{
1218 unsigned short cmd = 0x180|(location&0x7f);
1219 unsigned short rval = 0,wval = EC_CS|i586_RST;
1220 int i;
1221
1222 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1223 for (i=0x100 ; i ; i>>=1 )
1224 {
1225 if (cmd&i)
1226 wval |= EC_Wr;
1227 else
1228 wval &= ~EC_Wr;
1229
1230 outb(wval,ioaddr+EEPROM_Ctrl);
1231 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1232 eeprom_delay();
1233 outb(wval,ioaddr+EEPROM_Ctrl);
1234 eeprom_delay();
1235 }
1236 wval &= ~EC_Wr;
1237 outb(wval,ioaddr+EEPROM_Ctrl);
1238 for (i=0x8000 ; i ; i>>=1 )
1239 {
1240 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1241 eeprom_delay();
1242 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1243 rval |= i;
1244 outb(wval,ioaddr+EEPROM_Ctrl);
1245 eeprom_delay();
1246 }
1247 wval &= ~EC_CS;
1248 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1249 eeprom_delay();
1250 outb(wval,ioaddr+EEPROM_Ctrl);
1251 eeprom_delay();
1252 return rval;
1253}
1254
1255/*
1256 * Reap tx buffers and return last transmit status.
1257 * if ==0 then either:
1258 * a) we're not transmitting anything, so why are we here?
1259 * b) we've died.
1260 * otherwise, Stat_Busy(return) means we've still got some packets
1261 * to transmit, Stat_Done(return) means our buffers should be empty
1262 * again
1263 */
1264
1265static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1266{
1267 struct net_local *lp = netdev_priv(dev);
1268 unsigned short tx_block = lp->tx_reap;
1269 unsigned short status;
1270
1271 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1272 return 0x0000;
1273
1274 do
1275 {
1276 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1277 status = inw(dev->base_addr + SHADOW(tx_block));
1278 if (!Stat_Done(status))
1279 {
1280 lp->tx_link = tx_block;
1281 return status;
1282 }
1283 else
1284 {
1285 lp->last_tx_restart = 0;
1286 lp->stats.collisions += Stat_NoColl(status);
1287 if (!Stat_OK(status))
1288 {
1289 char *whatsup = NULL;
1290 lp->stats.tx_errors++;
1291 if (Stat_Abort(status))
1292 lp->stats.tx_aborted_errors++;
1293 if (Stat_TNoCar(status)) {
1294 whatsup = "aborted, no carrier";
1295 lp->stats.tx_carrier_errors++;
1296 }
1297 if (Stat_TNoCTS(status)) {
1298 whatsup = "aborted, lost CTS";
1299 lp->stats.tx_carrier_errors++;
1300 }
1301 if (Stat_TNoDMA(status)) {
1302 whatsup = "FIFO underran";
1303 lp->stats.tx_fifo_errors++;
1304 }
1305 if (Stat_TXColl(status)) {
1306 whatsup = "aborted, too many collisions";
1307 lp->stats.tx_aborted_errors++;
1308 }
1309 if (whatsup)
1310 printk(KERN_INFO "%s: transmit %s\n",
1311 dev->name, whatsup);
1312 }
1313 else
1314 lp->stats.tx_packets++;
1315 }
1316 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1317 lp->tx_reap = tx_block = TX_BUF_START;
1318 else
1319 lp->tx_reap = tx_block += TX_BUF_SIZE;
1320 netif_wake_queue(dev);
1321 }
1322 while (lp->tx_reap != lp->tx_head);
1323
1324 lp->tx_link = lp->tx_tail + 0x08;
1325
1326 return status;
1327}
1328
1329/*
1330 * This should never happen. It is called when some higher routine detects
1331 * that the CU has stopped, to try to restart it from the last packet we knew
1332 * we were working on, or the idle loop if we had finished for the time.
1333 */
1334
1335static void eexp_hw_txrestart(struct net_device *dev)
1336{
1337 struct net_local *lp = netdev_priv(dev);
1338 unsigned short ioaddr = dev->base_addr;
1339
1340 lp->last_tx_restart = lp->tx_link;
1341 scb_wrcbl(dev, lp->tx_link);
1342 scb_command(dev, SCB_CUstart);
1343 outb(0,ioaddr+SIGNAL_CA);
1344
1345 {
1346 unsigned short boguscount=50,failcount=5;
1347 while (!scb_status(dev))
1348 {
1349 if (!--boguscount)
1350 {
1351 if (--failcount)
1352 {
1353 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1354 scb_wrcbl(dev, lp->tx_link);
1355 scb_command(dev, SCB_CUstart);
1356 outb(0,ioaddr+SIGNAL_CA);
1357 boguscount = 100;
1358 }
1359 else
1360 {
1361 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1362 eexp_hw_init586(dev);
1363 netif_wake_queue(dev);
1364 return;
1365 }
1366 }
1367 }
1368 }
1369}
1370
1371/*
1372 * Writes down the list of transmit buffers into card memory. Each
1373 * entry consists of an 82586 transmit command, followed by a jump
1374 * pointing to itself. When we want to transmit a packet, we write
1375 * the data into the appropriate transmit buffer and then modify the
1376 * preceding jump to point at the new transmit command. This means that
1377 * the 586 command unit is continuously active.
1378 */
1379
1380static void eexp_hw_txinit(struct net_device *dev)
1381{
1382 struct net_local *lp = netdev_priv(dev);
1383 unsigned short tx_block = TX_BUF_START;
1384 unsigned short curtbuf;
1385 unsigned short ioaddr = dev->base_addr;
1386
1387 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1388 {
1389 outw(tx_block, ioaddr + WRITE_PTR);
1390
1391 outw(0x0000, ioaddr + DATAPORT);
1392 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1393 outw(tx_block+0x08, ioaddr + DATAPORT);
1394 outw(tx_block+0x0e, ioaddr + DATAPORT);
1395
1396 outw(0x0000, ioaddr + DATAPORT);
1397 outw(0x0000, ioaddr + DATAPORT);
1398 outw(tx_block+0x08, ioaddr + DATAPORT);
1399
1400 outw(0x8000, ioaddr + DATAPORT);
1401 outw(-1, ioaddr + DATAPORT);
1402 outw(tx_block+0x16, ioaddr + DATAPORT);
1403 outw(0x0000, ioaddr + DATAPORT);
1404
1405 tx_block += TX_BUF_SIZE;
1406 }
1407 lp->tx_head = TX_BUF_START;
1408 lp->tx_reap = TX_BUF_START;
1409 lp->tx_tail = tx_block - TX_BUF_SIZE;
1410 lp->tx_link = lp->tx_tail + 0x08;
1411 lp->rx_buf_start = tx_block;
1412
1413}
1414
1415/*
1416 * Write the circular list of receive buffer descriptors to card memory.
1417 * The end of the list isn't marked, which means that the 82586 receive
1418 * unit will loop until buffers become available (this avoids it giving us
1419 * "out of resources" messages).
1420 */
1421
1422static void eexp_hw_rxinit(struct net_device *dev)
1423{
1424 struct net_local *lp = netdev_priv(dev);
1425 unsigned short rx_block = lp->rx_buf_start;
1426 unsigned short ioaddr = dev->base_addr;
1427
1428 lp->num_rx_bufs = 0;
1429 lp->rx_first = lp->rx_ptr = rx_block;
1430 do
1431 {
1432 lp->num_rx_bufs++;
1433
1434 outw(rx_block, ioaddr + WRITE_PTR);
1435
1436 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1437 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1438 outw(0xffff, ioaddr+DATAPORT);
1439
1440 outw(0x0000, ioaddr+DATAPORT);
1441 outw(0xdead, ioaddr+DATAPORT);
1442 outw(0xdead, ioaddr+DATAPORT);
1443 outw(0xdead, ioaddr+DATAPORT);
1444 outw(0xdead, ioaddr+DATAPORT);
1445 outw(0xdead, ioaddr+DATAPORT);
1446 outw(0xdead, ioaddr+DATAPORT);
1447
1448 outw(0x0000, ioaddr+DATAPORT);
1449 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1450 outw(rx_block + 0x20, ioaddr+DATAPORT);
1451 outw(0, ioaddr+DATAPORT);
1452 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1453
1454 lp->rx_last = rx_block;
1455 rx_block += RX_BUF_SIZE;
1456 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1457
1458
1459 /* Make first Rx frame descriptor point to first Rx buffer
1460 descriptor */
1461 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1462 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1463
1464 /* Close Rx frame descriptor ring */
1465 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1466 outw(lp->rx_first, ioaddr+DATAPORT);
1467
1468 /* Close Rx buffer descriptor ring */
1469 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1470 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1471
1472}
1473
1474/*
1475 * Un-reset the 586, and start the configuration sequence. We don't wait for
1476 * this to finish, but allow the interrupt handler to start the CU and RU for
1477 * us. We can't start the receive/transmission system up before we know that
1478 * the hardware is configured correctly.
1479 */
1480
1481static void eexp_hw_init586(struct net_device *dev)
1482{
1483 struct net_local *lp = netdev_priv(dev);
1484 unsigned short ioaddr = dev->base_addr;
1485 int i;
1486
1487#if NET_DEBUG > 6
1488 printk("%s: eexp_hw_init586()\n", dev->name);
1489#endif
1490
1491 lp->started = 0;
1492
1493 set_loopback(dev);
1494
1495 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1496
1497 /* Download the startup code */
1498 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1499 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1500 outw(0x0000, ioaddr + 0x8008);
1501 outw(0x0000, ioaddr + 0x800a);
1502 outw(0x0000, ioaddr + 0x800c);
1503 outw(0x0000, ioaddr + 0x800e);
1504
1505 for (i = 0; i < (sizeof(start_code)); i+=32) {
1506 int j;
1507 outw(i, ioaddr + SM_PTR);
1508 for (j = 0; j < 16; j+=2)
1509 outw(start_code[(i+j)/2],
1510 ioaddr+0x4000+j);
1511 for (j = 0; j < 16; j+=2)
1512 outw(start_code[(i+j+16)/2],
1513 ioaddr+0x8000+j);
1514 }
1515
1516 /* Do we want promiscuous mode or multicast? */
1517 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1518 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1519 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1520 ioaddr+SHADOW(CONF_PROMISC));
1521 lp->was_promisc = dev->flags & IFF_PROMISC;
1522#if 0
1523 eexp_setup_filter(dev);
1524#endif
1525
1526 /* Write our hardware address */
1527 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1528 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
1529 outw(((unsigned short *)dev->dev_addr)[1],
1530 ioaddr+SHADOW(CONF_HWADDR+2));
1531 outw(((unsigned short *)dev->dev_addr)[2],
1532 ioaddr+SHADOW(CONF_HWADDR+4));
1533
1534 eexp_hw_txinit(dev);
1535 eexp_hw_rxinit(dev);
1536
1537 outb(0,ioaddr+EEPROM_Ctrl);
1538 mdelay(5);
1539
1540 scb_command(dev, 0xf000);
1541 outb(0,ioaddr+SIGNAL_CA);
1542
1543 outw(0, ioaddr+SM_PTR);
1544
1545 {
1546 unsigned short rboguscount=50,rfailcount=5;
1547 while (inw(ioaddr+0x4000))
1548 {
1549 if (!--rboguscount)
1550 {
1551 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1552 dev->name);
1553 scb_command(dev, 0);
1554 outb(0,ioaddr+SIGNAL_CA);
1555 rboguscount = 100;
1556 if (!--rfailcount)
1557 {
1558 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1559 dev->name);
1560 return;
1561 }
1562 }
1563 }
1564 }
1565
1566 scb_wrcbl(dev, CONF_LINK);
1567 scb_command(dev, 0xf000|SCB_CUstart);
1568 outb(0,ioaddr+SIGNAL_CA);
1569
1570 {
1571 unsigned short iboguscount=50,ifailcount=5;
1572 while (!scb_status(dev))
1573 {
1574 if (!--iboguscount)
1575 {
1576 if (--ifailcount)
1577 {
1578 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1579 dev->name, scb_status(dev), scb_rdcmd(dev));
1580 scb_wrcbl(dev, CONF_LINK);
1581 scb_command(dev, 0xf000|SCB_CUstart);
1582 outb(0,ioaddr+SIGNAL_CA);
1583 iboguscount = 100;
1584 }
1585 else
1586 {
1587 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1588 return;
1589 }
1590 }
1591 }
1592 }
1593
1594 clear_loopback(dev);
1595 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1596
1597 lp->init_time = jiffies;
1598#if NET_DEBUG > 6
1599 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1600#endif
1601 return;
1602}
1603
1604static void eexp_setup_filter(struct net_device *dev)
1605{
1606 struct dev_mc_list *dmi = dev->mc_list;
1607 unsigned short ioaddr = dev->base_addr;
1608 int count = dev->mc_count;
1609 int i;
1610 if (count > 8) {
1611 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1612 dev->name, count);
1613 count = 8;
1614 }
1615
1616 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1617 outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1618 for (i = 0; i < count; i++) {
1619 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1620 if (!dmi) {
1621 printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1622 break;
1623 }
1624 if (dmi->dmi_addrlen != ETH_ALEN) {
1625 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1626 continue;
1627 }
1628 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1629 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1630 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1631 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1632 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1633 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1634 }
1635}
1636
1637/*
1638 * Set or clear the multicast filter for this adaptor.
1639 */
1640static void
1641eexp_set_multicast(struct net_device *dev)
1642{
1643 unsigned short ioaddr = dev->base_addr;
1644 struct net_local *lp = netdev_priv(dev);
1645 int kick = 0, i;
1646 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1647 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1648 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1649 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1650 ioaddr+SHADOW(CONF_PROMISC));
1651 lp->was_promisc = dev->flags & IFF_PROMISC;
1652 kick = 1;
1653 }
1654 if (!(dev->flags & IFF_PROMISC)) {
1655 eexp_setup_filter(dev);
1656 if (lp->old_mc_count != dev->mc_count) {
1657 kick = 1;
1658 lp->old_mc_count = dev->mc_count;
1659 }
1660 }
1661 if (kick) {
1662 unsigned long oj;
1663 scb_command(dev, SCB_CUsuspend);
1664 outb(0, ioaddr+SIGNAL_CA);
1665 outb(0, ioaddr+SIGNAL_CA);
1666#if 0
1667 printk("%s: waiting for CU to go suspended\n", dev->name);
1668#endif
1669 oj = jiffies;
1670 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1671 ((jiffies-oj) < 2000));
1672 if (SCB_CUstat(scb_status(dev)) == 2)
1673 printk("%s: warning, CU didn't stop\n", dev->name);
1674 lp->started &= ~(STARTED_CU);
1675 scb_wrcbl(dev, CONF_LINK);
1676 scb_command(dev, SCB_CUstart);
1677 outb(0, ioaddr+SIGNAL_CA);
1678 }
1679}
1680
1681
1682/*
1683 * MODULE stuff
1684 */
1685
1686#ifdef MODULE
1687
1688#define EEXP_MAX_CARDS 4 /* max number of cards to support */
1689
1690static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1691static int irq[EEXP_MAX_CARDS];
1692static int io[EEXP_MAX_CARDS];
1693
1694module_param_array(io, int, NULL, 0);
1695module_param_array(irq, int, NULL, 0);
1696MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1697MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1698MODULE_LICENSE("GPL");
1699
1700
1701/* Ideally the user would give us io=, irq= for every card. If any parameters
1702 * are specified, we verify and then use them. If no parameters are given, we
1703 * autoprobe for one card only.
1704 */
1705int init_module(void)
1706{
1707 struct net_device *dev;
1708 int this_dev, found = 0;
1709
1710 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1711 dev = alloc_etherdev(sizeof(struct net_local));
1712 dev->irq = irq[this_dev];
1713 dev->base_addr = io[this_dev];
1714 if (io[this_dev] == 0) {
1715 if (this_dev)
1716 break;
1717 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1718 }
1719 if (do_express_probe(dev) == 0 && register_netdev(dev) == 0) {
1720 dev_eexp[this_dev] = dev;
1721 found++;
1722 continue;
1723 }
1724 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1725 free_netdev(dev);
1726 break;
1727 }
1728 if (found)
1729 return 0;
1730 return -ENXIO;
1731}
1732
1733void cleanup_module(void)
1734{
1735 int this_dev;
1736
1737 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1738 struct net_device *dev = dev_eexp[this_dev];
1739 if (dev) {
1740 unregister_netdev(dev);
1741 free_netdev(dev);
1742 }
1743 }
1744}
1745#endif
1746
1747/*
1748 * Local Variables:
1749 * c-file-style: "linux"
1750 * tab-width: 8
1751 * End:
1752 */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 12:11:27 -0500