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1da177e4
LT		 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
6aa20a22 80 * should detect 16-bit vs 8-bit mode from the EEPROM settings and act
1da177e4
LT		 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
6aa20a22 99
1da177e4
LT		 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
119#include <asm/system.h>
120#include <asm/io.h>
121#include <asm/irq.h>
122
123#ifndef NET_DEBUG
124#define NET_DEBUG 4
125#endif
126
127#include "eexpress.h"
128
129#define EEXP_IO_EXTENT 16
130
131/*
132 * Private data declarations
133 */
134
135struct net_local
136{
137 struct net_device_stats stats;
138 unsigned long last_tx; /* jiffies when last transmit started */
139 unsigned long init_time; /* jiffies when eexp_hw_init586 called */
140 unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
141 unsigned short rx_last; /* last rx buf */
142 unsigned short rx_ptr; /* first rx buf to look at */
143 unsigned short tx_head; /* next free tx buf */
144 unsigned short tx_reap; /* first in-use tx buf */
145 unsigned short tx_tail; /* previous tx buf to tx_head */
146 unsigned short tx_link; /* last known-executing tx buf */
147 unsigned short last_tx_restart; /* set to tx_link when we
148 restart the CU */
149 unsigned char started;
150 unsigned short rx_buf_start;
151 unsigned short rx_buf_end;
152 unsigned short num_tx_bufs;
153 unsigned short num_rx_bufs;
154 unsigned char width; /* 0 for 16bit, 1 for 8bit */
155 unsigned char was_promisc;
156 unsigned char old_mc_count;
157 spinlock_t lock;
158};
159
160/* This is the code and data that is downloaded to the EtherExpress card's
161 * memory at boot time.
162 */
163
164static unsigned short start_code[] = {
165/* 0x0000 */
166 0x0001, /* ISCP: busy - cleared after reset */
167 0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */
168
169 0x0000,0x0000, /* SCB: status, commands */
170 0x0000,0x0000, /* links to first command block,
171 first receive descriptor */
172 0x0000,0x0000, /* CRC error, alignment error counts */
173 0x0000,0x0000, /* out of resources, overrun error counts */
174
175 0x0000,0x0000, /* pad */
176 0x0000,0x0000,
177
178/* 0x20 -- start of 82586 CU program */
179#define CONF_LINK 0x20
6aa20a22 180 0x0000,Cmd_Config,
1da177e4
LT		 181 0x0032, /* link to next command */
182 0x080c, /* 12 bytes follow : fifo threshold=8 */
183 0x2e40, /* don't rx bad frames
184 * SRDY/ARDY => ext. sync. : preamble len=8
185 * take addresses from data buffers
186 * 6 bytes/address
187 */
188 0x6000, /* default backoff method & priority
189 * interframe spacing = 0x60 */
6aa20a22 190 0xf200, /* slot time=0x200
1da177e4
LT		 191 * max collision retry = 0xf */
192#define CONF_PROMISC 0x2e
6aa20a22 193 0x0000, /* no HDLC : normal CRC : enable broadcast
1da177e4
LT		 194 * disable promiscuous/multicast modes */
195 0x003c, /* minimum frame length = 60 octets) */
196
197 0x0000,Cmd_SetAddr,
198 0x003e, /* link to next command */
199#define CONF_HWADDR 0x38
200 0x0000,0x0000,0x0000, /* hardware address placed here */
201
202 0x0000,Cmd_MCast,
203 0x0076, /* link to next command */
204#define CONF_NR_MULTICAST 0x44
205 0x0000, /* number of multicast addresses */
206#define CONF_MULTICAST 0x46
207 0x0000, 0x0000, 0x0000, /* some addresses */
208 0x0000, 0x0000, 0x0000,
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
216#define CONF_DIAG_RESULT 0x76
217 0x0000, Cmd_Diag,
218 0x007c, /* link to next command */
219
220 0x0000,Cmd_TDR|Cmd_INT,
221 0x0084,
222#define CONF_TDR_RESULT 0x82
223 0x0000,
224
225 0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
226 0x0084 /* dummy link */
227};
228
229/* maps irq number to EtherExpress magic value */
230static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
231
232#ifdef CONFIG_MCA_LEGACY
233/* mapping of the first four bits of the second POS register */
234static unsigned short mca_iomap[] = {
235 0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
236 0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
237};
238/* bits 5-7 of the second POS register */
239static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
6aa20a22 240#endif
1da177e4
LT		 241
242/*
243 * Prototypes for Linux interface
244 */
245
246static int eexp_open(struct net_device *dev);
247static int eexp_close(struct net_device *dev);
248static void eexp_timeout(struct net_device *dev);
249static struct net_device_stats *eexp_stats(struct net_device *dev);
250static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
251
252static irqreturn_t eexp_irq(int irq, void *dev_addr, struct pt_regs *regs);
253static void eexp_set_multicast(struct net_device *dev);
254
255/*
256 * Prototypes for hardware access functions
257 */
258
259static void eexp_hw_rx_pio(struct net_device *dev);
260static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
261 unsigned short len);
262static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
263static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
264 unsigned char location);
265
266static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
267static void eexp_hw_txrestart(struct net_device *dev);
268
269static void eexp_hw_txinit (struct net_device *dev);
270static void eexp_hw_rxinit (struct net_device *dev);
271
272static void eexp_hw_init586 (struct net_device *dev);
273static void eexp_setup_filter (struct net_device *dev);
274
275static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
276enum eexp_iftype {AUI=0, BNC=1, TPE=2};
277
278#define STARTED_RU 2
279#define STARTED_CU 1
280
281/*
282 * Primitive hardware access functions.
283 */
284
285static inline unsigned short scb_status(struct net_device *dev)
286{
287 return inw(dev->base_addr + 0xc008);
288}
289
290static inline unsigned short scb_rdcmd(struct net_device *dev)
291{
292 return inw(dev->base_addr + 0xc00a);
293}
294
295static inline void scb_command(struct net_device *dev, unsigned short cmd)
296{
297 outw(cmd, dev->base_addr + 0xc00a);
298}
299
300static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
301{
302 outw(val, dev->base_addr + 0xc00c);
303}
304
305static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
306{
307 outw(val, dev->base_addr + 0xc00e);
308}
309
310static inline void set_loopback(struct net_device *dev)
311{
312 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
313}
314
315static inline void clear_loopback(struct net_device *dev)
316{
317 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
318}
319
320static inline unsigned short int SHADOW(short int addr)
321{
322 addr &= 0x1f;
323 if (addr > 0xf) addr += 0x3ff0;
324 return addr + 0x4000;
325}
326
327/*
328 * Linux interface
329 */
330
331/*
332 * checks for presence of EtherExpress card
333 */
334
335static int __init do_express_probe(struct net_device *dev)
336{
337 unsigned short *port;
338 static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
339 unsigned short ioaddr = dev->base_addr;
340 int dev_irq = dev->irq;
341 int err;
342
343 SET_MODULE_OWNER(dev);
344
345 dev->if_port = 0xff; /* not set */
346
347#ifdef CONFIG_MCA_LEGACY
348 if (MCA_bus) {
349 int slot = 0;
350
351 /*
352 * Only find one card at a time. Subsequent calls
353 * will find others, however, proper multicard MCA
354 * probing and setup can't be done with the
355 * old-style Space.c init routines. -- ASF
356 */
357 while (slot != MCA_NOTFOUND) {
358 int pos0, pos1;
6aa20a22 359
1da177e4
LT		 360 slot = mca_find_unused_adapter(0x628B, slot);
361 if (slot == MCA_NOTFOUND)
362 break;
363
364 pos0 = mca_read_stored_pos(slot, 2);
365 pos1 = mca_read_stored_pos(slot, 3);
366 ioaddr = mca_iomap[pos1&0xf];
367
368 dev->irq = mca_irqmap[(pos1>>4)&0x7];
6aa20a22 369
1da177e4
LT		 370 /*
371 * XXX: Transciever selection is done
6aa20a22 372 * differently on the MCA version.
1da177e4
LT		 373 * How to get it to select something
374 * other than external/AUI is currently
375 * unknown. This code is just for looks. -- ASF
376 */
377 if ((pos0 & 0x7) == 0x1)
378 dev->if_port = AUI;
379 else if ((pos0 & 0x7) == 0x5) {
380 if (pos1 & 0x80)
381 dev->if_port = BNC;
382 else
383 dev->if_port = TPE;
384 }
385
386 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
387 mca_set_adapter_procfn(slot, NULL, dev);
388 mca_mark_as_used(slot);
389
390 break;
391 }
392 }
393#endif
394 if (ioaddr&0xfe00) {
395 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
396 return -EBUSY;
397 err = eexp_hw_probe(dev,ioaddr);
398 release_region(ioaddr, EEXP_IO_EXTENT);
399 return err;
400 } else if (ioaddr)
401 return -ENXIO;
402
403 for (port=&ports[0] ; *port ; port++ )
404 {
405 unsigned short sum = 0;
406 int i;
407 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
408 continue;
409 for ( i=0 ; i<4 ; i++ )
410 {
411 unsigned short t;
412 t = inb(*port + ID_PORT);
413 sum |= (t>>4) << ((t & 0x03)<<2);
414 }
415 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
416 release_region(*port, EEXP_IO_EXTENT);
417 return 0;
418 }
419 release_region(*port, EEXP_IO_EXTENT);
420 dev->irq = dev_irq;
421 }
422 return -ENODEV;
423}
424
425#ifndef MODULE
426struct net_device * __init express_probe(int unit)
427{
428 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
429 int err;
430
431 if (!dev)
432 return ERR_PTR(-ENOMEM);
433
434 sprintf(dev->name, "eth%d", unit);
435 netdev_boot_setup_check(dev);
436
437 err = do_express_probe(dev);
b1fc5505
HX		 438 if (!err)
439 return dev;
1da177e4
LT		 440 free_netdev(dev);
441 return ERR_PTR(err);
442}
443#endif
444
445/*
446 * open and initialize the adapter, ready for use
447 */
448
449static int eexp_open(struct net_device *dev)
450{
451 int ret;
452 unsigned short ioaddr = dev->base_addr;
453 struct net_local *lp = netdev_priv(dev);
454
455#if NET_DEBUG > 6
456 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
457#endif
458
459 if (!dev->irq || !irqrmap[dev->irq])
460 return -ENXIO;
461
462 ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
463 if (ret) return ret;
464
465 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
466 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
467 , ioaddr);
468 goto err_out1;
469 }
470 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
471 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
472 , ioaddr+0x4000);
473 goto err_out2;
474 }
475 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
476 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
477 , ioaddr+0x8000);
478 goto err_out3;
479 }
480 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
481 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
482 , ioaddr+0xc000);
483 goto err_out4;
484 }
6aa20a22 485
1da177e4
LT		 486 if (lp->width) {
487 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
488 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
489 }
490
491 eexp_hw_init586(dev);
492 netif_start_queue(dev);
493#if NET_DEBUG > 6
494 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
495#endif
496 return 0;
497
498 err_out4:
499 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
500 err_out3:
501 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
502 err_out2:
503 release_region(ioaddr, EEXP_IO_EXTENT);
504 err_out1:
505 free_irq(dev->irq, dev);
506 return -EBUSY;
507}
508
509/*
510 * close and disable the interface, leaving the 586 in reset.
511 */
512
513static int eexp_close(struct net_device *dev)
514{
515 unsigned short ioaddr = dev->base_addr;
516 struct net_local *lp = netdev_priv(dev);
517
518 int irq = dev->irq;
519
520 netif_stop_queue(dev);
6aa20a22 521
1da177e4
LT		 522 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
523 lp->started = 0;
524 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
525 outb(0,ioaddr+SIGNAL_CA);
526 free_irq(irq,dev);
527 outb(i586_RST,ioaddr+EEPROM_Ctrl);
528 release_region(ioaddr, EEXP_IO_EXTENT);
529 release_region(ioaddr+0x4000, 16);
530 release_region(ioaddr+0x8000, 16);
531 release_region(ioaddr+0xc000, 16);
532
533 return 0;
534}
535
536/*
537 * Return interface stats
538 */
539
540static struct net_device_stats *eexp_stats(struct net_device *dev)
541{
542 struct net_local *lp = netdev_priv(dev);
543
544 return &lp->stats;
545}
546
547/*
548 * This gets called when a higher level thinks we are broken. Check that
549 * nothing has become jammed in the CU.
550 */
551
552static void unstick_cu(struct net_device *dev)
553{
554 struct net_local *lp = netdev_priv(dev);
555 unsigned short ioaddr = dev->base_addr;
556
557 if (lp->started)
558 {
559 if ((jiffies - dev->trans_start)>50)
560 {
561 if (lp->tx_link==lp->last_tx_restart)
562 {
563 unsigned short boguscount=200,rsst;
564 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
565 dev->name, scb_status(dev));
566 eexp_hw_txinit(dev);
567 lp->last_tx_restart = 0;
568 scb_wrcbl(dev, lp->tx_link);
569 scb_command(dev, SCB_CUstart);
570 outb(0,ioaddr+SIGNAL_CA);
571 while (!SCB_complete(rsst=scb_status(dev)))
572 {
573 if (!--boguscount)
574 {
575 boguscount=200;
576 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
577 dev->name,rsst);
578 scb_wrcbl(dev, lp->tx_link);
579 scb_command(dev, SCB_CUstart);
580 outb(0,ioaddr+SIGNAL_CA);
581 }
582 }
583 netif_wake_queue(dev);
584 }
585 else
586 {
587 unsigned short status = scb_status(dev);
588 if (SCB_CUdead(status))
589 {
590 unsigned short txstatus = eexp_hw_lasttxstat(dev);
591 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
592 dev->name, status, txstatus);
593 eexp_hw_txrestart(dev);
594 }
595 else
596 {
597 unsigned short txstatus = eexp_hw_lasttxstat(dev);
598 if (netif_queue_stopped(dev) && !txstatus)
599 {
600 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
601 dev->name,status,txstatus);
602 eexp_hw_init586(dev);
603 netif_wake_queue(dev);
604 }
605 else
606 {
607 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
608 }
609 }
610 }
611 }
612 }
613 else
614 {
615 if ((jiffies-lp->init_time)>10)
616 {
617 unsigned short status = scb_status(dev);
618 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
619 dev->name, status);
620 eexp_hw_init586(dev);
621 netif_wake_queue(dev);
622 }
623 }
624}
625
626static void eexp_timeout(struct net_device *dev)
627{
628 struct net_local *lp = netdev_priv(dev);
629#ifdef CONFIG_SMP
630 unsigned long flags;
631#endif
632 int status;
6aa20a22 633
1da177e4
LT		 634 disable_irq(dev->irq);
635
636 /*
637 * Best would be to use synchronize_irq(); spin_lock() here
638 * lets make it work first..
639 */
6aa20a22 640
1da177e4
LT		 641#ifdef CONFIG_SMP
642 spin_lock_irqsave(&lp->lock, flags);
643#endif
644
645 status = scb_status(dev);
646 unstick_cu(dev);
647 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
648 (SCB_complete(status)?"lost interrupt":
649 "board on fire"));
650 lp->stats.tx_errors++;
651 lp->last_tx = jiffies;
652 if (!SCB_complete(status)) {
653 scb_command(dev, SCB_CUabort);
654 outb(0,dev->base_addr+SIGNAL_CA);
655 }
6aa20a22 656 netif_wake_queue(dev);
1da177e4
LT		 657#ifdef CONFIG_SMP
658 spin_unlock_irqrestore(&lp->lock, flags);
659#endif
660}
661
662/*
663 * Called to transmit a packet, or to allow us to right ourselves
664 * if the kernel thinks we've died.
665 */
666static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
667{
668 struct net_local *lp = netdev_priv(dev);
669 short length = buf->len;
670#ifdef CONFIG_SMP
671 unsigned long flags;
672#endif
673
674#if NET_DEBUG > 6
675 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
676#endif
677
678 if (buf->len < ETH_ZLEN) {
5b057c6b 679 if (skb_padto(buf, ETH_ZLEN))
1da177e4
LT		 680 return 0;
681 length = ETH_ZLEN;
682 }
683
684 disable_irq(dev->irq);
685
686 /*
687 * Best would be to use synchronize_irq(); spin_lock() here
688 * lets make it work first..
689 */
6aa20a22 690
1da177e4
LT		 691#ifdef CONFIG_SMP
692 spin_lock_irqsave(&lp->lock, flags);
693#endif
6aa20a22 694
1da177e4
LT		 695 {
696 unsigned short *data = (unsigned short *)buf->data;
697
698 lp->stats.tx_bytes += length;
699
700 eexp_hw_tx_pio(dev,data,length);
701 }
702 dev_kfree_skb(buf);
703#ifdef CONFIG_SMP
704 spin_unlock_irqrestore(&lp->lock, flags);
705#endif
706 enable_irq(dev->irq);
707 return 0;
708}
709
710/*
711 * Handle an EtherExpress interrupt
712 * If we've finished initializing, start the RU and CU up.
713 * If we've already started, reap tx buffers, handle any received packets,
714 * check to make sure we've not become wedged.
715 */
716
717/*
718 * Handle an EtherExpress interrupt
719 * If we've finished initializing, start the RU and CU up.
720 * If we've already started, reap tx buffers, handle any received packets,
721 * check to make sure we've not become wedged.
722 */
723
724static unsigned short eexp_start_irq(struct net_device *dev,
725 unsigned short status)
726{
727 unsigned short ack_cmd = SCB_ack(status);
728 struct net_local *lp = netdev_priv(dev);
729 unsigned short ioaddr = dev->base_addr;
730 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
731 short diag_status, tdr_status;
732 while (SCB_CUstat(status)==2)
733 status = scb_status(dev);
734#if NET_DEBUG > 4
735 printk("%s: CU went non-active (status %04x)\n",
736 dev->name, status);
737#endif
738
739 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
740 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
741 if (diag_status & 1<<11) {
6aa20a22 742 printk(KERN_WARNING "%s: 82586 failed self-test\n",
1da177e4
LT		 743 dev->name);
744 } else if (!(diag_status & 1<<13)) {
745 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
746 }
747
748 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
749 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
750 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
751 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" : "");
6aa20a22 752 }
1da177e4
LT		 753 else if (tdr_status & TDR_XCVRPROBLEM) {
754 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
755 }
756 else if (tdr_status & TDR_LINKOK) {
757#if NET_DEBUG > 4
758 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
759#endif
760 } else {
761 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
762 tdr_status);
763 }
6aa20a22 764
1da177e4
LT		 765 lp->started |= STARTED_CU;
766 scb_wrcbl(dev, lp->tx_link);
767 /* if the RU isn't running, start it now */
768 if (!(lp->started & STARTED_RU)) {
769 ack_cmd |= SCB_RUstart;
770 scb_wrrfa(dev, lp->rx_buf_start);
771 lp->rx_ptr = lp->rx_buf_start;
772 lp->started |= STARTED_RU;
773 }
774 ack_cmd |= SCB_CUstart | 0x2000;
775 }
776
6aa20a22 777 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
1da177e4
LT		 778 lp->started|=STARTED_RU;
779
780 return ack_cmd;
781}
782
783static void eexp_cmd_clear(struct net_device *dev)
784{
785 unsigned long int oldtime = jiffies;
786 while (scb_rdcmd(dev) && ((jiffies-oldtime)<10));
787 if (scb_rdcmd(dev)) {
788 printk("%s: command didn't clear\n", dev->name);
789 }
790}
6aa20a22 791
1da177e4
LT		 792static irqreturn_t eexp_irq(int irq, void *dev_info, struct pt_regs *regs)
793{
794 struct net_device *dev = dev_info;
795 struct net_local *lp;
796 unsigned short ioaddr,status,ack_cmd;
797 unsigned short old_read_ptr, old_write_ptr;
798
799 if (dev==NULL)
800 {
801 printk(KERN_WARNING "eexpress: irq %d for unknown device\n",
802 irq);
803 return IRQ_NONE;
804 }
805
806 lp = netdev_priv(dev);
807 ioaddr = dev->base_addr;
808
809 spin_lock(&lp->lock);
810
811 old_read_ptr = inw(ioaddr+READ_PTR);
812 old_write_ptr = inw(ioaddr+WRITE_PTR);
813
814 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
815
6aa20a22 816
1da177e4
LT		 817 status = scb_status(dev);
818
819#if NET_DEBUG > 4
820 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
821#endif
822
823 if (lp->started == (STARTED_CU | STARTED_RU)) {
824
825 do {
826 eexp_cmd_clear(dev);
827
828 ack_cmd = SCB_ack(status);
829 scb_command(dev, ack_cmd);
830 outb(0,ioaddr+SIGNAL_CA);
831
832 eexp_cmd_clear(dev);
833
834 if (SCB_complete(status)) {
835 if (!eexp_hw_lasttxstat(dev)) {
836 printk("%s: tx interrupt but no status\n", dev->name);
837 }
838 }
6aa20a22
JG		 839
840 if (SCB_rxdframe(status))
1da177e4
LT		 841 eexp_hw_rx_pio(dev);
842
843 status = scb_status(dev);
844 } while (status & 0xc000);
845
6aa20a22 846 if (SCB_RUdead(status))
1da177e4
LT		 847 {
848 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
849 dev->name,status);
850#if 0
851 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
852 outw(lp->cur_rfd, ioaddr+READ_PTR);
853 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
854 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
855 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
856 outw(rbd, ioaddr+READ_PTR);
857 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
858 outw(rbd+8, ioaddr+READ_PTR);
859 printk("[%04x]\n", inw(ioaddr+DATAPORT));
860#endif
861 lp->stats.rx_errors++;
862#if 1
863 eexp_hw_rxinit(dev);
864#else
865 lp->cur_rfd = lp->first_rfd;
866#endif
867 scb_wrrfa(dev, lp->rx_buf_start);
868 scb_command(dev, SCB_RUstart);
869 outb(0,ioaddr+SIGNAL_CA);
6aa20a22 870 }
1da177e4 871 } else {
6aa20a22 872 if (status & 0x8000)
1da177e4
LT		 873 ack_cmd = eexp_start_irq(dev, status);
874 else
875 ack_cmd = SCB_ack(status);
876 scb_command(dev, ack_cmd);
877 outb(0,ioaddr+SIGNAL_CA);
878 }
879
880 eexp_cmd_clear(dev);
881
6aa20a22 882 outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
1da177e4 883
6aa20a22 884#if NET_DEBUG > 6
1da177e4
LT		 885 printk("%s: leaving eexp_irq()\n", dev->name);
886#endif
887 outw(old_read_ptr, ioaddr+READ_PTR);
888 outw(old_write_ptr, ioaddr+WRITE_PTR);
6aa20a22 889
1da177e4
LT		 890 spin_unlock(&lp->lock);
891 return IRQ_HANDLED;
892}
893
894/*
895 * Hardware access functions
896 */
897
898/*
899 * Set the cable type to use.
900 */
901
902static void eexp_hw_set_interface(struct net_device *dev)
903{
904 unsigned char oldval = inb(dev->base_addr + 0x300e);
905 oldval &= ~0x82;
906 switch (dev->if_port) {
907 case TPE:
908 oldval |= 0x2;
909 case BNC:
910 oldval |= 0x80;
911 break;
912 }
913 outb(oldval, dev->base_addr+0x300e);
914 mdelay(20);
915}
916
917/*
918 * Check all the receive buffers, and hand any received packets
919 * to the upper levels. Basic sanity check on each frame
920 * descriptor, though we don't bother trying to fix broken ones.
921 */
922
923static void eexp_hw_rx_pio(struct net_device *dev)
924{
925 struct net_local *lp = netdev_priv(dev);
926 unsigned short rx_block = lp->rx_ptr;
927 unsigned short boguscount = lp->num_rx_bufs;
928 unsigned short ioaddr = dev->base_addr;
929 unsigned short status;
930
931#if NET_DEBUG > 6
932 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
933#endif
934
935 do {
936 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
6aa20a22 937
1da177e4
LT		 938 outw(rx_block, ioaddr + READ_PTR);
939 status = inw(ioaddr + DATAPORT);
940
941 if (FD_Done(status))
942 {
943 rfd_cmd = inw(ioaddr + DATAPORT);
944 rx_next = inw(ioaddr + DATAPORT);
945 pbuf = inw(ioaddr + DATAPORT);
6aa20a22 946
1da177e4
LT		 947 outw(pbuf, ioaddr + READ_PTR);
948 pkt_len = inw(ioaddr + DATAPORT);
949
950 if (rfd_cmd!=0x0000)
951 {
952 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
953 dev->name, rfd_cmd);
954 continue;
955 }
956 else if (pbuf!=rx_block+0x16)
957 {
6aa20a22 958 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
1da177e4
LT		 959 dev->name, rx_block+0x16, pbuf);
960 continue;
961 }
6aa20a22 962 else if ((pkt_len & 0xc000)!=0xc000)
1da177e4
LT		 963 {
964 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
965 dev->name, pkt_len & 0xc000);
966 continue;
967 }
6aa20a22 968 else if (!FD_OK(status))
1da177e4
LT		 969 {
970 lp->stats.rx_errors++;
971 if (FD_CRC(status))
972 lp->stats.rx_crc_errors++;
973 if (FD_Align(status))
974 lp->stats.rx_frame_errors++;
975 if (FD_Resrc(status))
976 lp->stats.rx_fifo_errors++;
977 if (FD_DMA(status))
978 lp->stats.rx_over_errors++;
979 if (FD_Short(status))
980 lp->stats.rx_length_errors++;
981 }
982 else
983 {
984 struct sk_buff *skb;
985 pkt_len &= 0x3fff;
986 skb = dev_alloc_skb(pkt_len+16);
987 if (skb == NULL)
988 {
989 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
990 lp->stats.rx_dropped++;
991 break;
992 }
993 skb->dev = dev;
994 skb_reserve(skb, 2);
995 outw(pbuf+10, ioaddr+READ_PTR);
996 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
997 skb->protocol = eth_type_trans(skb,dev);
998 netif_rx(skb);
999 dev->last_rx = jiffies;
1000 lp->stats.rx_packets++;
1001 lp->stats.rx_bytes += pkt_len;
1002 }
1003 outw(rx_block, ioaddr+WRITE_PTR);
1004 outw(0, ioaddr+DATAPORT);
1005 outw(0, ioaddr+DATAPORT);
1006 rx_block = rx_next;
1007 }
1008 } while (FD_Done(status) && boguscount--);
1009 lp->rx_ptr = rx_block;
1010}
1011
1012/*
1013 * Hand a packet to the card for transmission
1014 * If we get here, we MUST have already checked
1015 * to make sure there is room in the transmit
1016 * buffer region.
1017 */
1018
1019static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
1020 unsigned short len)
1021{
1022 struct net_local *lp = netdev_priv(dev);
1023 unsigned short ioaddr = dev->base_addr;
1024
1025 if (LOCKUP16 || lp->width) {
1026 /* Stop the CU so that there is no chance that it
1027 jumps off to a bogus address while we are writing the
6aa20a22 1028 pointer to the next transmit packet in 8-bit mode --
1da177e4 1029 this eliminates the "CU wedged" errors in 8-bit mode.
6aa20a22 1030 (Zoltan Szilagyi 10-12-96) */
1da177e4
LT		 1031 scb_command(dev, SCB_CUsuspend);
1032 outw(0xFFFF, ioaddr+SIGNAL_CA);
1033 }
1034
1035 outw(lp->tx_head, ioaddr + WRITE_PTR);
1036
1037 outw(0x0000, ioaddr + DATAPORT);
1038 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1039 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1040 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1041
1042 outw(0x0000, ioaddr + DATAPORT);
1043 outw(0x0000, ioaddr + DATAPORT);
1044 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1045
1046 outw(0x8000|len, ioaddr + DATAPORT);
1047 outw(-1, ioaddr + DATAPORT);
1048 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1049 outw(0, ioaddr + DATAPORT);
1050
1051 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1052
1053 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1054 outw(lp->tx_head, ioaddr + DATAPORT);
1055
1056 dev->trans_start = jiffies;
1057 lp->tx_tail = lp->tx_head;
1058 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1059 lp->tx_head = TX_BUF_START;
1060 else
1061 lp->tx_head += TX_BUF_SIZE;
1062 if (lp->tx_head != lp->tx_reap)
1063 netif_wake_queue(dev);
6aa20a22 1064
1da177e4
LT		 1065 if (LOCKUP16 || lp->width) {
1066 /* Restart the CU so that the packet can actually
1067 be transmitted. (Zoltan Szilagyi 10-12-96) */
1068 scb_command(dev, SCB_CUresume);
1069 outw(0xFFFF, ioaddr+SIGNAL_CA);
1070 }
1071
1072 lp->stats.tx_packets++;
1073 lp->last_tx = jiffies;
1074}
1075
1076/*
1077 * Sanity check the suspected EtherExpress card
1078 * Read hardware address, reset card, size memory and initialize buffer
1079 * memory pointers. These are held in dev->priv, in case someone has more
1080 * than one card in a machine.
1081 */
1082
1083static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1084{
1085 unsigned short hw_addr[3];
1086 unsigned char buswidth;
1087 unsigned int memory_size;
1088 int i;
1089 unsigned short xsum = 0;
1090 struct net_local *lp = netdev_priv(dev);
1091
1092 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1093
1094 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1095 outb(0, ioaddr+EEPROM_Ctrl);
1096 udelay(500);
1097 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1098
1099 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1100 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1101 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1102
1103 /* Standard Address or Compaq LTE Address */
1104 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
6aa20a22 1105 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1da177e4
LT		 1106 {
1107 printk(" rejected: invalid address %04x%04x%04x\n",
1108 hw_addr[2],hw_addr[1],hw_addr[0]);
1109 return -ENODEV;
1110 }
1111
1112 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1113 * though.
1114 */
1115 for (i = 0; i < 64; i++)
1116 xsum += eexp_hw_readeeprom(ioaddr, i);
1117 if (xsum != 0xbaba)
1118 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1119
1120 dev->base_addr = ioaddr;
1121 for ( i=0 ; i<6 ; i++ )
1122 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1123
1124 {
1125 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1126 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1127
1128 /* Use the IRQ from EEPROM if none was given */
1129 if (!dev->irq)
1130 dev->irq = irqmap[setupval>>13];
1131
1132 if (dev->if_port == 0xff) {
1133 dev->if_port = !(setupval & 0x1000) ? AUI :
1134 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1135 }
1136
1137 buswidth = !((setupval & 0x400) >> 10);
1138 }
1139
1140 memset(lp, 0, sizeof(struct net_local));
1141 spin_lock_init(&lp->lock);
1142
6aa20a22 1143 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1da177e4 1144 eexp_ifmap[dev->if_port], buswidth?8:16);
6aa20a22 1145
1da177e4
LT		 1146 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1147 return -EBUSY;
1148
1149 eexp_hw_set_interface(dev);
6aa20a22 1150
1da177e4 1151 release_region(dev->base_addr + 0x300e, 1);
6aa20a22 1152
1da177e4
LT		 1153 /* Find out how much RAM we have on the card */
1154 outw(0, dev->base_addr + WRITE_PTR);
1155 for (i = 0; i < 32768; i++)
1156 outw(0, dev->base_addr + DATAPORT);
1157
1158 for (memory_size = 0; memory_size < 64; memory_size++)
1159 {
1160 outw(memory_size<<10, dev->base_addr + READ_PTR);
1161 if (inw(dev->base_addr+DATAPORT))
1162 break;
1163 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1164 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1165 outw(memory_size<<10, dev->base_addr + READ_PTR);
1166 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1167 break;
1168 }
1169
1170 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1171 * of RAM to play with.
1172 */
1173 lp->num_tx_bufs = 4;
1174 lp->rx_buf_end = 0x3ff6;
1175 switch (memory_size)
1176 {
1177 case 64:
1178 lp->rx_buf_end += 0x4000;
1179 case 48:
1180 lp->num_tx_bufs += 4;
1181 lp->rx_buf_end += 0x4000;
1182 case 32:
1183 lp->rx_buf_end += 0x4000;
1184 case 16:
1185 printk(", %dk RAM)\n", memory_size);
1186 break;
1187 default:
1188 printk(") bad memory size (%dk).\n", memory_size);
1189 return -ENODEV;
1190 break;
1191 }
1192
1193 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1194 lp->width = buswidth;
1195
1196 dev->open = eexp_open;
1197 dev->stop = eexp_close;
1198 dev->hard_start_xmit = eexp_xmit;
1199 dev->get_stats = eexp_stats;
1200 dev->set_multicast_list = &eexp_set_multicast;
1201 dev->tx_timeout = eexp_timeout;
1202 dev->watchdog_timeo = 2*HZ;
b1fc5505
HX		 1203
1204 return register_netdev(dev);
1da177e4
LT		 1205}
1206
1207/*
1208 * Read a word from the EtherExpress on-board serial EEPROM.
1209 * The EEPROM contains 64 words of 16 bits.
1210 */
1211static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1212 unsigned char location)
1213{
1214 unsigned short cmd = 0x180|(location&0x7f);
1215 unsigned short rval = 0,wval = EC_CS|i586_RST;
1216 int i;
1217
1218 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1219 for (i=0x100 ; i ; i>>=1 )
1220 {
1221 if (cmd&i)
1222 wval |= EC_Wr;
1223 else
1224 wval &= ~EC_Wr;
1225
1226 outb(wval,ioaddr+EEPROM_Ctrl);
1227 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1228 eeprom_delay();
1229 outb(wval,ioaddr+EEPROM_Ctrl);
1230 eeprom_delay();
1231 }
1232 wval &= ~EC_Wr;
1233 outb(wval,ioaddr+EEPROM_Ctrl);
1234 for (i=0x8000 ; i ; i>>=1 )
1235 {
1236 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1237 eeprom_delay();
1238 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1239 rval |= i;
1240 outb(wval,ioaddr+EEPROM_Ctrl);
1241 eeprom_delay();
1242 }
1243 wval &= ~EC_CS;
1244 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1245 eeprom_delay();
1246 outb(wval,ioaddr+EEPROM_Ctrl);
1247 eeprom_delay();
1248 return rval;
1249}
1250
1251/*
1252 * Reap tx buffers and return last transmit status.
1253 * if ==0 then either:
1254 * a) we're not transmitting anything, so why are we here?
1255 * b) we've died.
1256 * otherwise, Stat_Busy(return) means we've still got some packets
1257 * to transmit, Stat_Done(return) means our buffers should be empty
1258 * again
1259 */
1260
1261static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1262{
1263 struct net_local *lp = netdev_priv(dev);
1264 unsigned short tx_block = lp->tx_reap;
1265 unsigned short status;
1266
1267 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1268 return 0x0000;
1269
1270 do
1271 {
1272 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1273 status = inw(dev->base_addr + SHADOW(tx_block));
1274 if (!Stat_Done(status))
1275 {
1276 lp->tx_link = tx_block;
1277 return status;
1278 }
1279 else
1280 {
1281 lp->last_tx_restart = 0;
1282 lp->stats.collisions += Stat_NoColl(status);
1283 if (!Stat_OK(status))
1284 {
1285 char *whatsup = NULL;
1286 lp->stats.tx_errors++;
6aa20a22 1287 if (Stat_Abort(status))
1da177e4
LT		 1288 lp->stats.tx_aborted_errors++;
1289 if (Stat_TNoCar(status)) {
1290 whatsup = "aborted, no carrier";
1291 lp->stats.tx_carrier_errors++;
1292 }
1293 if (Stat_TNoCTS(status)) {
1294 whatsup = "aborted, lost CTS";
1295 lp->stats.tx_carrier_errors++;
1296 }
1297 if (Stat_TNoDMA(status)) {
1298 whatsup = "FIFO underran";
1299 lp->stats.tx_fifo_errors++;
1300 }
1301 if (Stat_TXColl(status)) {
1302 whatsup = "aborted, too many collisions";
1303 lp->stats.tx_aborted_errors++;
1304 }
1305 if (whatsup)
1306 printk(KERN_INFO "%s: transmit %s\n",
1307 dev->name, whatsup);
1308 }
1309 else
1310 lp->stats.tx_packets++;
1311 }
1312 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1313 lp->tx_reap = tx_block = TX_BUF_START;
1314 else
1315 lp->tx_reap = tx_block += TX_BUF_SIZE;
1316 netif_wake_queue(dev);
1317 }
1318 while (lp->tx_reap != lp->tx_head);
1319
1320 lp->tx_link = lp->tx_tail + 0x08;
1321
1322 return status;
1323}
1324
1325/*
1326 * This should never happen. It is called when some higher routine detects
1327 * that the CU has stopped, to try to restart it from the last packet we knew
1328 * we were working on, or the idle loop if we had finished for the time.
1329 */
1330
1331static void eexp_hw_txrestart(struct net_device *dev)
1332{
1333 struct net_local *lp = netdev_priv(dev);
1334 unsigned short ioaddr = dev->base_addr;
1335
1336 lp->last_tx_restart = lp->tx_link;
1337 scb_wrcbl(dev, lp->tx_link);
1338 scb_command(dev, SCB_CUstart);
1339 outb(0,ioaddr+SIGNAL_CA);
1340
1341 {
1342 unsigned short boguscount=50,failcount=5;
1343 while (!scb_status(dev))
1344 {
1345 if (!--boguscount)
1346 {
1347 if (--failcount)
1348 {
1349 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1350 scb_wrcbl(dev, lp->tx_link);
1351 scb_command(dev, SCB_CUstart);
1352 outb(0,ioaddr+SIGNAL_CA);
1353 boguscount = 100;
1354 }
1355 else
1356 {
1357 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1358 eexp_hw_init586(dev);
1359 netif_wake_queue(dev);
1360 return;
1361 }
1362 }
1363 }
1364 }
1365}
1366
1367/*
1368 * Writes down the list of transmit buffers into card memory. Each
1369 * entry consists of an 82586 transmit command, followed by a jump
1370 * pointing to itself. When we want to transmit a packet, we write
1371 * the data into the appropriate transmit buffer and then modify the
1372 * preceding jump to point at the new transmit command. This means that
1373 * the 586 command unit is continuously active.
1374 */
1375
1376static void eexp_hw_txinit(struct net_device *dev)
1377{
1378 struct net_local *lp = netdev_priv(dev);
1379 unsigned short tx_block = TX_BUF_START;
1380 unsigned short curtbuf;
1381 unsigned short ioaddr = dev->base_addr;
1382
1383 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1384 {
1385 outw(tx_block, ioaddr + WRITE_PTR);
1386
1387 outw(0x0000, ioaddr + DATAPORT);
1388 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1389 outw(tx_block+0x08, ioaddr + DATAPORT);
1390 outw(tx_block+0x0e, ioaddr + DATAPORT);
1391
1392 outw(0x0000, ioaddr + DATAPORT);
1393 outw(0x0000, ioaddr + DATAPORT);
1394 outw(tx_block+0x08, ioaddr + DATAPORT);
1395
1396 outw(0x8000, ioaddr + DATAPORT);
1397 outw(-1, ioaddr + DATAPORT);
1398 outw(tx_block+0x16, ioaddr + DATAPORT);
1399 outw(0x0000, ioaddr + DATAPORT);
1400
1401 tx_block += TX_BUF_SIZE;
1402 }
1403 lp->tx_head = TX_BUF_START;
1404 lp->tx_reap = TX_BUF_START;
1405 lp->tx_tail = tx_block - TX_BUF_SIZE;
1406 lp->tx_link = lp->tx_tail + 0x08;
1407 lp->rx_buf_start = tx_block;
1408
1409}
1410
1411/*
1412 * Write the circular list of receive buffer descriptors to card memory.
1413 * The end of the list isn't marked, which means that the 82586 receive
1414 * unit will loop until buffers become available (this avoids it giving us
1415 * "out of resources" messages).
1416 */
1417
1418static void eexp_hw_rxinit(struct net_device *dev)
1419{
1420 struct net_local *lp = netdev_priv(dev);
1421 unsigned short rx_block = lp->rx_buf_start;
1422 unsigned short ioaddr = dev->base_addr;
1423
1424 lp->num_rx_bufs = 0;
1425 lp->rx_first = lp->rx_ptr = rx_block;
1426 do
1427 {
1428 lp->num_rx_bufs++;
1429
1430 outw(rx_block, ioaddr + WRITE_PTR);
1431
1432 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1433 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1434 outw(0xffff, ioaddr+DATAPORT);
1435
1436 outw(0x0000, ioaddr+DATAPORT);
1437 outw(0xdead, ioaddr+DATAPORT);
1438 outw(0xdead, ioaddr+DATAPORT);
1439 outw(0xdead, ioaddr+DATAPORT);
1440 outw(0xdead, ioaddr+DATAPORT);
1441 outw(0xdead, ioaddr+DATAPORT);
1442 outw(0xdead, ioaddr+DATAPORT);
1443
1444 outw(0x0000, ioaddr+DATAPORT);
1445 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1446 outw(rx_block + 0x20, ioaddr+DATAPORT);
1447 outw(0, ioaddr+DATAPORT);
1448 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1449
1450 lp->rx_last = rx_block;
1451 rx_block += RX_BUF_SIZE;
1452 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1453
1454
1455 /* Make first Rx frame descriptor point to first Rx buffer
1456 descriptor */
1457 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1458 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1459
1460 /* Close Rx frame descriptor ring */
1461 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1462 outw(lp->rx_first, ioaddr+DATAPORT);
6aa20a22 1463
1da177e4
LT		 1464 /* Close Rx buffer descriptor ring */
1465 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1466 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
6aa20a22 1467
1da177e4
LT		 1468}
1469
1470/*
1471 * Un-reset the 586, and start the configuration sequence. We don't wait for
1472 * this to finish, but allow the interrupt handler to start the CU and RU for
1473 * us. We can't start the receive/transmission system up before we know that
1474 * the hardware is configured correctly.
1475 */
1476
1477static void eexp_hw_init586(struct net_device *dev)
1478{
1479 struct net_local *lp = netdev_priv(dev);
1480 unsigned short ioaddr = dev->base_addr;
1481 int i;
1482
1483#if NET_DEBUG > 6
1484 printk("%s: eexp_hw_init586()\n", dev->name);
1485#endif
1486
1487 lp->started = 0;
1488
1489 set_loopback(dev);
1490
1491 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1492
1493 /* Download the startup code */
1494 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1495 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1496 outw(0x0000, ioaddr + 0x8008);
1497 outw(0x0000, ioaddr + 0x800a);
1498 outw(0x0000, ioaddr + 0x800c);
1499 outw(0x0000, ioaddr + 0x800e);
1500
1501 for (i = 0; i < (sizeof(start_code)); i+=32) {
1502 int j;
1503 outw(i, ioaddr + SM_PTR);
1504 for (j = 0; j < 16; j+=2)
1505 outw(start_code[(i+j)/2],
1506 ioaddr+0x4000+j);
1507 for (j = 0; j < 16; j+=2)
1508 outw(start_code[(i+j+16)/2],
1509 ioaddr+0x8000+j);
1510 }
1511
1512 /* Do we want promiscuous mode or multicast? */
1513 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1514 i = inw(ioaddr+SHADOW(CONF_PROMISC));
6aa20a22 1515 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1da177e4
LT		 1516 ioaddr+SHADOW(CONF_PROMISC));
1517 lp->was_promisc = dev->flags & IFF_PROMISC;
1518#if 0
1519 eexp_setup_filter(dev);
1520#endif
1521
1522 /* Write our hardware address */
1523 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1524 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
6aa20a22 1525 outw(((unsigned short *)dev->dev_addr)[1],
1da177e4
LT		 1526 ioaddr+SHADOW(CONF_HWADDR+2));
1527 outw(((unsigned short *)dev->dev_addr)[2],
1528 ioaddr+SHADOW(CONF_HWADDR+4));
1529
1530 eexp_hw_txinit(dev);
1531 eexp_hw_rxinit(dev);
1532
1533 outb(0,ioaddr+EEPROM_Ctrl);
1534 mdelay(5);
1535
1536 scb_command(dev, 0xf000);
1537 outb(0,ioaddr+SIGNAL_CA);
1538
1539 outw(0, ioaddr+SM_PTR);
1540
1541 {
1542 unsigned short rboguscount=50,rfailcount=5;
1543 while (inw(ioaddr+0x4000))
1544 {
1545 if (!--rboguscount)
1546 {
1547 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1548 dev->name);
1549 scb_command(dev, 0);
1550 outb(0,ioaddr+SIGNAL_CA);
1551 rboguscount = 100;
1552 if (!--rfailcount)
1553 {
1554 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1555 dev->name);
1556 return;
1557 }
1558 }
1559 }
1560 }
1561
1562 scb_wrcbl(dev, CONF_LINK);
1563 scb_command(dev, 0xf000|SCB_CUstart);
1564 outb(0,ioaddr+SIGNAL_CA);
1565
1566 {
1567 unsigned short iboguscount=50,ifailcount=5;
1568 while (!scb_status(dev))
1569 {
1570 if (!--iboguscount)
1571 {
1572 if (--ifailcount)
1573 {
1574 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1575 dev->name, scb_status(dev), scb_rdcmd(dev));
1576 scb_wrcbl(dev, CONF_LINK);
1577 scb_command(dev, 0xf000|SCB_CUstart);
1578 outb(0,ioaddr+SIGNAL_CA);
1579 iboguscount = 100;
1580 }
1581 else
1582 {
1583 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1584 return;
1585 }
1586 }
1587 }
1588 }
1589
1590 clear_loopback(dev);
1591 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1592
1593 lp->init_time = jiffies;
1594#if NET_DEBUG > 6
1595 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1596#endif
1597 return;
1598}
1599
1600static void eexp_setup_filter(struct net_device *dev)
1601{
1602 struct dev_mc_list *dmi = dev->mc_list;
1603 unsigned short ioaddr = dev->base_addr;
1604 int count = dev->mc_count;
1605 int i;
1606 if (count > 8) {
1607 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1608 dev->name, count);
1609 count = 8;
1610 }
6aa20a22 1611
1da177e4
LT		 1612 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1613 outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1614 for (i = 0; i < count; i++) {
1615 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1616 if (!dmi) {
1617 printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1618 break;
1619 }
1620 if (dmi->dmi_addrlen != ETH_ALEN) {
1621 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1622 continue;
1623 }
1624 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1625 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1626 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1627 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1628 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1629 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1630 }
1631}
1632
1633/*
1634 * Set or clear the multicast filter for this adaptor.
1635 */
1636static void
1637eexp_set_multicast(struct net_device *dev)
1638{
1639 unsigned short ioaddr = dev->base_addr;
1640 struct net_local *lp = netdev_priv(dev);
1641 int kick = 0, i;
1642 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1643 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1644 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1645 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1646 ioaddr+SHADOW(CONF_PROMISC));
1647 lp->was_promisc = dev->flags & IFF_PROMISC;
1648 kick = 1;
1649 }
1650 if (!(dev->flags & IFF_PROMISC)) {
1651 eexp_setup_filter(dev);
1652 if (lp->old_mc_count != dev->mc_count) {
1653 kick = 1;
1654 lp->old_mc_count = dev->mc_count;
1655 }
1656 }
1657 if (kick) {
1658 unsigned long oj;
1659 scb_command(dev, SCB_CUsuspend);
1660 outb(0, ioaddr+SIGNAL_CA);
1661 outb(0, ioaddr+SIGNAL_CA);
1662#if 0
1663 printk("%s: waiting for CU to go suspended\n", dev->name);
1664#endif
1665 oj = jiffies;
1666 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1667 ((jiffies-oj) < 2000));
1668 if (SCB_CUstat(scb_status(dev)) == 2)
1669 printk("%s: warning, CU didn't stop\n", dev->name);
1670 lp->started &= ~(STARTED_CU);
1671 scb_wrcbl(dev, CONF_LINK);
1672 scb_command(dev, SCB_CUstart);
1673 outb(0, ioaddr+SIGNAL_CA);
1674 }
1675}
1676
1677
1678/*
1679 * MODULE stuff
1680 */
1681
1682#ifdef MODULE
1683
1684#define EEXP_MAX_CARDS 4 /* max number of cards to support */
1685
1686static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1687static int irq[EEXP_MAX_CARDS];
1688static int io[EEXP_MAX_CARDS];
1689
1690module_param_array(io, int, NULL, 0);
1691module_param_array(irq, int, NULL, 0);
1692MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1693MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1694MODULE_LICENSE("GPL");
1695
1696
1697/* Ideally the user would give us io=, irq= for every card. If any parameters
1698 * are specified, we verify and then use them. If no parameters are given, we
1699 * autoprobe for one card only.
1700 */
b1176b95 1701int __init init_module(void)
1da177e4
LT		 1702{
1703 struct net_device *dev;
1704 int this_dev, found = 0;
1705
1706 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1707 dev = alloc_etherdev(sizeof(struct net_local));
1708 dev->irq = irq[this_dev];
1709 dev->base_addr = io[this_dev];
1710 if (io[this_dev] == 0) {
1711 if (this_dev)
1712 break;
1713 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1714 }
b1fc5505 1715 if (do_express_probe(dev) == 0) {
1da177e4
LT		 1716 dev_eexp[this_dev] = dev;
1717 found++;
1718 continue;
1719 }
1720 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1721 free_netdev(dev);
1722 break;
1723 }
1724 if (found)
1725 return 0;
1726 return -ENXIO;
1727}
1728
1729void cleanup_module(void)
1730{
1731 int this_dev;
1732
1733 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1734 struct net_device *dev = dev_eexp[this_dev];
1735 if (dev) {
1736 unregister_netdev(dev);
1737 free_netdev(dev);
1738 }
1739 }
1740}
1741#endif
1742
1743/*
1744 * Local Variables:
1745 * c-file-style: "linux"
1746 * tab-width: 8
1747 * End:
1748 */
Clone of davem's net-next-2.6 tree