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