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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / net / eexpress.c
blob9c85e50014b469a11a96de418b49d77d07258efd
1 /* Intel EtherExpress 16 device driver for Linux
2 *
3 * Written by John Sullivan, 1995
4 * based on original code by Donald Becker, with changes by
5 * Alan Cox and Pauline Middelink.
6 *
7 * Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
8 *
9 * Many modifications, and currently maintained, by
10 * Philip Blundell <philb@gnu.org>
11 * Added the Compaq LTE Alan Cox <alan@redhat.com>
12 * Added MCA support Adam Fritzler <mid@auk.cx>
13 *
14 * Note - this driver is experimental still - it has problems on faster
15 * machines. Someone needs to sit down and go through it line by line with
16 * a databook...
17 */
18
19 /* The EtherExpress 16 is a fairly simple card, based on a shared-memory
20 * design using the i82586 Ethernet coprocessor. It bears no relationship,
21 * as far as I know, to the similarly-named "EtherExpress Pro" range.
22 *
23 * Historically, Linux support for these cards has been very bad. However,
24 * things seem to be getting better slowly.
25 */
26
27 /* If your card is confused about what sort of interface it has (eg it
28 * persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
29 * or 'SOFTSET /LISA' from DOS seems to help.
30 */
31
32 /* Here's the scoop on memory mapping.
33 *
34 * There are three ways to access EtherExpress card memory: either using the
35 * shared-memory mapping, or using PIO through the dataport, or using PIO
36 * through the "shadow memory" ports.
37 *
38 * The shadow memory system works by having the card map some of its memory
39 * as follows:
40 *
41 * (the low five bits of the SMPTR are ignored)
42 *
43 * base+0x4000..400f memory at SMPTR+0..15
44 * base+0x8000..800f memory at SMPTR+16..31
45 * base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently)
46 * base+0xc008..c00f memory at 0x0008..0x000f
47 *
48 * This last set (the one at c008) is particularly handy because the SCB
49 * lives at 0x0008. So that set of ports gives us easy random access to data
50 * in the SCB without having to mess around setting up pointers and the like.
51 * We always use this method to access the SCB (via the scb_xx() functions).
52 *
53 * Dataport access works by aiming the appropriate (read or write) pointer
54 * at the first address you're interested in, and then reading or writing from
55 * the dataport. The pointers auto-increment after each transfer. We use
56 * this for data transfer.
57 *
58 * We don't use the shared-memory system because it allegedly doesn't work on
59 * all cards, and because it's a bit more prone to go wrong (it's one more
60 * thing to configure...).
61 */
62
63 /* Known bugs:
64 *
65 * - The card seems to want to give us two interrupts every time something
66 * happens, where just one would be better.
67 */
68
69 /*
70 *
71 * Note by Zoltan Szilagyi 10-12-96:
72 *
73 * I've succeeded in eliminating the "CU wedged" messages, and hence the
74 * lockups, which were only occurring with cards running in 8-bit mode ("force
75 * 8-bit operation" in Intel's SoftSet utility). This version of the driver
76 * sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
77 * CU before submitting a packet for transmission, and then restarts it as soon
78 * as the process of handing the packet is complete. This is definitely an
79 * unnecessary slowdown if the card is running in 16-bit mode; therefore one
80 * should detect 16-bit vs 8-bit mode from the EEPROM settings and act
81 * accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
82 * ftp's, which is significantly better than I get in DOS, so the overhead of
83 * stopping and restarting the CU with each transmit is not prohibitive in
84 * practice.
85 *
86 * Update by David Woodhouse 11/5/99:
87 *
88 * I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
89 * I assume that this is because 16-bit accesses are actually handled as two
90 * 8-bit accesses.
91 */
92
93 #ifdef __alpha__
94 #define LOCKUP16 1
95 #endif
96 #ifndef LOCKUP16
97 #define LOCKUP16 0
98 #endif
99
100 #include <linux/module.h>
101 #include <linux/kernel.h>
102 #include <linux/types.h>
103 #include <linux/fcntl.h>
104 #include <linux/interrupt.h>
105 #include <linux/ioport.h>
106 #include <linux/string.h>
107 #include <linux/in.h>
108 #include <linux/delay.h>
109 #include <linux/errno.h>
110 #include <linux/init.h>
111 #include <linux/netdevice.h>
112 #include <linux/etherdevice.h>
113 #include <linux/skbuff.h>
114 #include <linux/slab.h>
115 #include <linux/mca-legacy.h>
116 #include <linux/spinlock.h>
117 #include <linux/bitops.h>
118 #include <linux/jiffies.h>
119
120 #include <asm/system.h>
121 #include <asm/io.h>
122 #include <asm/irq.h>
123
124 #ifndef NET_DEBUG
125 #define NET_DEBUG 4
126 #endif
127
128 #include "eexpress.h"
129
130 #define EEXP_IO_EXTENT 16
131
132 /*
133 * Private data declarations
134 */
135
136 struct net_local
137 {
138 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
164 static 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
180 0x0000,Cmd_Config,
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 */
190 0xf200, /* slot time=0x200
191 * max collision retry = 0xf */
192 #define CONF_PROMISC 0x2e
193 0x0000, /* no HDLC : normal CRC : enable broadcast
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 */
230 static 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 */
234 static 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 */
239 static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
240 #endif
241
242 /*
243 * Prototypes for Linux interface
244 */
245
246 static int eexp_open(struct net_device *dev);
247 static int eexp_close(struct net_device *dev);
248 static void eexp_timeout(struct net_device *dev);
249 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
250
251 static irqreturn_t eexp_irq(int irq, void *dev_addr);
252 static void eexp_set_multicast(struct net_device *dev);
253
254 /*
255 * Prototypes for hardware access functions
256 */
257
258 static void eexp_hw_rx_pio(struct net_device *dev);
259 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
260 unsigned short len);
261 static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
262 static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
263 unsigned char location);
264
265 static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
266 static void eexp_hw_txrestart(struct net_device *dev);
267
268 static void eexp_hw_txinit (struct net_device *dev);
269 static void eexp_hw_rxinit (struct net_device *dev);
270
271 static void eexp_hw_init586 (struct net_device *dev);
272 static void eexp_setup_filter (struct net_device *dev);
273
274 static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
275 enum eexp_iftype {AUI=0, BNC=1, TPE=2};
276
277 #define STARTED_RU 2
278 #define STARTED_CU 1
279
280 /*
281 * Primitive hardware access functions.
282 */
283
284 static inline unsigned short scb_status(struct net_device *dev)
285 {
286 return inw(dev->base_addr + 0xc008);
287 }
288
289 static inline unsigned short scb_rdcmd(struct net_device *dev)
290 {
291 return inw(dev->base_addr + 0xc00a);
292 }
293
294 static inline void scb_command(struct net_device *dev, unsigned short cmd)
295 {
296 outw(cmd, dev->base_addr + 0xc00a);
297 }
298
299 static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
300 {
301 outw(val, dev->base_addr + 0xc00c);
302 }
303
304 static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
305 {
306 outw(val, dev->base_addr + 0xc00e);
307 }
308
309 static inline void set_loopback(struct net_device *dev)
310 {
311 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
312 }
313
314 static inline void clear_loopback(struct net_device *dev)
315 {
316 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
317 }
318
319 static inline unsigned short int SHADOW(short int addr)
320 {
321 addr &= 0x1f;
322 if (addr > 0xf) addr += 0x3ff0;
323 return addr + 0x4000;
324 }
325
326 /*
327 * Linux interface
328 */
329
330 /*
331 * checks for presence of EtherExpress card
332 */
333
334 static int __init do_express_probe(struct net_device *dev)
335 {
336 unsigned short *port;
337 static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
338 unsigned short ioaddr = dev->base_addr;
339 int dev_irq = dev->irq;
340 int err;
341
342 dev->if_port = 0xff; /* not set */
343
344 #ifdef CONFIG_MCA_LEGACY
345 if (MCA_bus) {
346 int slot = 0;
347
348 /*
349 * Only find one card at a time. Subsequent calls
350 * will find others, however, proper multicard MCA
351 * probing and setup can't be done with the
352 * old-style Space.c init routines. -- ASF
353 */
354 while (slot != MCA_NOTFOUND) {
355 int pos0, pos1;
356
357 slot = mca_find_unused_adapter(0x628B, slot);
358 if (slot == MCA_NOTFOUND)
359 break;
360
361 pos0 = mca_read_stored_pos(slot, 2);
362 pos1 = mca_read_stored_pos(slot, 3);
363 ioaddr = mca_iomap[pos1&0xf];
364
365 dev->irq = mca_irqmap[(pos1>>4)&0x7];
366
367 /*
368 * XXX: Transciever selection is done
369 * differently on the MCA version.
370 * How to get it to select something
371 * other than external/AUI is currently
372 * unknown. This code is just for looks. -- ASF
373 */
374 if ((pos0 & 0x7) == 0x1)
375 dev->if_port = AUI;
376 else if ((pos0 & 0x7) == 0x5) {
377 if (pos1 & 0x80)
378 dev->if_port = BNC;
379 else
380 dev->if_port = TPE;
381 }
382
383 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
384 mca_set_adapter_procfn(slot, NULL, dev);
385 mca_mark_as_used(slot);
386
387 break;
388 }
389 }
390 #endif
391 if (ioaddr&0xfe00) {
392 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
393 return -EBUSY;
394 err = eexp_hw_probe(dev,ioaddr);
395 release_region(ioaddr, EEXP_IO_EXTENT);
396 return err;
397 } else if (ioaddr)
398 return -ENXIO;
399
400 for (port=&ports[0] ; *port ; port++ )
401 {
402 unsigned short sum = 0;
403 int i;
404 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
405 continue;
406 for ( i=0 ; i<4 ; i++ )
407 {
408 unsigned short t;
409 t = inb(*port + ID_PORT);
410 sum |= (t>>4) << ((t & 0x03)<<2);
411 }
412 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
413 release_region(*port, EEXP_IO_EXTENT);
414 return 0;
415 }
416 release_region(*port, EEXP_IO_EXTENT);
417 dev->irq = dev_irq;
418 }
419 return -ENODEV;
420 }
421
422 #ifndef MODULE
423 struct net_device * __init express_probe(int unit)
424 {
425 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
426 int err;
427
428 if (!dev)
429 return ERR_PTR(-ENOMEM);
430
431 sprintf(dev->name, "eth%d", unit);
432 netdev_boot_setup_check(dev);
433
434 err = do_express_probe(dev);
435 if (!err)
436 return dev;
437 free_netdev(dev);
438 return ERR_PTR(err);
439 }
440 #endif
441
442 /*
443 * open and initialize the adapter, ready for use
444 */
445
446 static int eexp_open(struct net_device *dev)
447 {
448 int ret;
449 unsigned short ioaddr = dev->base_addr;
450 struct net_local *lp = netdev_priv(dev);
451
452 #if NET_DEBUG > 6
453 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
454 #endif
455
456 if (!dev->irq || !irqrmap[dev->irq])
457 return -ENXIO;
458
459 ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
460 if (ret) return ret;
461
462 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
463 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
464 , ioaddr);
465 goto err_out1;
466 }
467 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
468 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
469 , ioaddr+0x4000);
470 goto err_out2;
471 }
472 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
473 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
474 , ioaddr+0x8000);
475 goto err_out3;
476 }
477 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
478 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
479 , ioaddr+0xc000);
480 goto err_out4;
481 }
482
483 if (lp->width) {
484 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
485 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
486 }
487
488 eexp_hw_init586(dev);
489 netif_start_queue(dev);
490 #if NET_DEBUG > 6
491 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
492 #endif
493 return 0;
494
495 err_out4:
496 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
497 err_out3:
498 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
499 err_out2:
500 release_region(ioaddr, EEXP_IO_EXTENT);
501 err_out1:
502 free_irq(dev->irq, dev);
503 return -EBUSY;
504 }
505
506 /*
507 * close and disable the interface, leaving the 586 in reset.
508 */
509
510 static int eexp_close(struct net_device *dev)
511 {
512 unsigned short ioaddr = dev->base_addr;
513 struct net_local *lp = netdev_priv(dev);
514
515 int irq = dev->irq;
516
517 netif_stop_queue(dev);
518
519 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
520 lp->started = 0;
521 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
522 outb(0,ioaddr+SIGNAL_CA);
523 free_irq(irq,dev);
524 outb(i586_RST,ioaddr+EEPROM_Ctrl);
525 release_region(ioaddr, EEXP_IO_EXTENT);
526 release_region(ioaddr+0x4000, 16);
527 release_region(ioaddr+0x8000, 16);
528 release_region(ioaddr+0xc000, 16);
529
530 return 0;
531 }
532
533 /*
534 * This gets called when a higher level thinks we are broken. Check that
535 * nothing has become jammed in the CU.
536 */
537
538 static void unstick_cu(struct net_device *dev)
539 {
540 struct net_local *lp = netdev_priv(dev);
541 unsigned short ioaddr = dev->base_addr;
542
543 if (lp->started)
544 {
545 if (time_after(jiffies, dev->trans_start + 50))
546 {
547 if (lp->tx_link==lp->last_tx_restart)
548 {
549 unsigned short boguscount=200,rsst;
550 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
551 dev->name, scb_status(dev));
552 eexp_hw_txinit(dev);
553 lp->last_tx_restart = 0;
554 scb_wrcbl(dev, lp->tx_link);
555 scb_command(dev, SCB_CUstart);
556 outb(0,ioaddr+SIGNAL_CA);
557 while (!SCB_complete(rsst=scb_status(dev)))
558 {
559 if (!--boguscount)
560 {
561 boguscount=200;
562 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
563 dev->name,rsst);
564 scb_wrcbl(dev, lp->tx_link);
565 scb_command(dev, SCB_CUstart);
566 outb(0,ioaddr+SIGNAL_CA);
567 }
568 }
569 netif_wake_queue(dev);
570 }
571 else
572 {
573 unsigned short status = scb_status(dev);
574 if (SCB_CUdead(status))
575 {
576 unsigned short txstatus = eexp_hw_lasttxstat(dev);
577 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
578 dev->name, status, txstatus);
579 eexp_hw_txrestart(dev);
580 }
581 else
582 {
583 unsigned short txstatus = eexp_hw_lasttxstat(dev);
584 if (netif_queue_stopped(dev) && !txstatus)
585 {
586 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
587 dev->name,status,txstatus);
588 eexp_hw_init586(dev);
589 netif_wake_queue(dev);
590 }
591 else
592 {
593 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
594 }
595 }
596 }
597 }
598 }
599 else
600 {
601 if (time_after(jiffies, lp->init_time + 10))
602 {
603 unsigned short status = scb_status(dev);
604 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
605 dev->name, status);
606 eexp_hw_init586(dev);
607 netif_wake_queue(dev);
608 }
609 }
610 }
611
612 static void eexp_timeout(struct net_device *dev)
613 {
614 struct net_local *lp = netdev_priv(dev);
615 #ifdef CONFIG_SMP
616 unsigned long flags;
617 #endif
618 int status;
619
620 disable_irq(dev->irq);
621
622 /*
623 * Best would be to use synchronize_irq(); spin_lock() here
624 * lets make it work first..
625 */
626
627 #ifdef CONFIG_SMP
628 spin_lock_irqsave(&lp->lock, flags);
629 #endif
630
631 status = scb_status(dev);
632 unstick_cu(dev);
633 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
634 (SCB_complete(status)?"lost interrupt":
635 "board on fire"));
636 dev->stats.tx_errors++;
637 lp->last_tx = jiffies;
638 if (!SCB_complete(status)) {
639 scb_command(dev, SCB_CUabort);
640 outb(0,dev->base_addr+SIGNAL_CA);
641 }
642 netif_wake_queue(dev);
643 #ifdef CONFIG_SMP
644 spin_unlock_irqrestore(&lp->lock, flags);
645 #endif
646 }
647
648 /*
649 * Called to transmit a packet, or to allow us to right ourselves
650 * if the kernel thinks we've died.
651 */
652 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
653 {
654 struct net_local *lp = netdev_priv(dev);
655 short length = buf->len;
656 #ifdef CONFIG_SMP
657 unsigned long flags;
658 #endif
659
660 #if NET_DEBUG > 6
661 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
662 #endif
663
664 if (buf->len < ETH_ZLEN) {
665 if (skb_padto(buf, ETH_ZLEN))
666 return 0;
667 length = ETH_ZLEN;
668 }
669
670 disable_irq(dev->irq);
671
672 /*
673 * Best would be to use synchronize_irq(); spin_lock() here
674 * lets make it work first..
675 */
676
677 #ifdef CONFIG_SMP
678 spin_lock_irqsave(&lp->lock, flags);
679 #endif
680
681 {
682 unsigned short *data = (unsigned short *)buf->data;
683
684 dev->stats.tx_bytes += length;
685
686 eexp_hw_tx_pio(dev,data,length);
687 }
688 dev_kfree_skb(buf);
689 #ifdef CONFIG_SMP
690 spin_unlock_irqrestore(&lp->lock, flags);
691 #endif
692 enable_irq(dev->irq);
693 return 0;
694 }
695
696 /*
697 * Handle an EtherExpress interrupt
698 * If we've finished initializing, start the RU and CU up.
699 * If we've already started, reap tx buffers, handle any received packets,
700 * check to make sure we've not become wedged.
701 */
702
703 static unsigned short eexp_start_irq(struct net_device *dev,
704 unsigned short status)
705 {
706 unsigned short ack_cmd = SCB_ack(status);
707 struct net_local *lp = netdev_priv(dev);
708 unsigned short ioaddr = dev->base_addr;
709 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
710 short diag_status, tdr_status;
711 while (SCB_CUstat(status)==2)
712 status = scb_status(dev);
713 #if NET_DEBUG > 4
714 printk("%s: CU went non-active (status %04x)\n",
715 dev->name, status);
716 #endif
717
718 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
719 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
720 if (diag_status & 1<<11) {
721 printk(KERN_WARNING "%s: 82586 failed self-test\n",
722 dev->name);
723 } else if (!(diag_status & 1<<13)) {
724 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
725 }
726
727 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
728 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
729 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
730 printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : "");
731 }
732 else if (tdr_status & TDR_XCVRPROBLEM) {
733 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
734 }
735 else if (tdr_status & TDR_LINKOK) {
736 #if NET_DEBUG > 4
737 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
738 #endif
739 } else {
740 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
741 tdr_status);
742 }
743
744 lp->started |= STARTED_CU;
745 scb_wrcbl(dev, lp->tx_link);
746 /* if the RU isn't running, start it now */
747 if (!(lp->started & STARTED_RU)) {
748 ack_cmd |= SCB_RUstart;
749 scb_wrrfa(dev, lp->rx_buf_start);
750 lp->rx_ptr = lp->rx_buf_start;
751 lp->started |= STARTED_RU;
752 }
753 ack_cmd |= SCB_CUstart | 0x2000;
754 }
755
756 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
757 lp->started|=STARTED_RU;
758
759 return ack_cmd;
760 }
761
762 static void eexp_cmd_clear(struct net_device *dev)
763 {
764 unsigned long int oldtime = jiffies;
765 while (scb_rdcmd(dev) && (time_before(jiffies, oldtime + 10)));
766 if (scb_rdcmd(dev)) {
767 printk("%s: command didn't clear\n", dev->name);
768 }
769 }
770
771 static irqreturn_t eexp_irq(int irq, void *dev_info)
772 {
773 struct net_device *dev = dev_info;
774 struct net_local *lp;
775 unsigned short ioaddr,status,ack_cmd;
776 unsigned short old_read_ptr, old_write_ptr;
777
778 lp = netdev_priv(dev);
779 ioaddr = dev->base_addr;
780
781 spin_lock(&lp->lock);
782
783 old_read_ptr = inw(ioaddr+READ_PTR);
784 old_write_ptr = inw(ioaddr+WRITE_PTR);
785
786 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
787
788
789 status = scb_status(dev);
790
791 #if NET_DEBUG > 4
792 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
793 #endif
794
795 if (lp->started == (STARTED_CU | STARTED_RU)) {
796
797 do {
798 eexp_cmd_clear(dev);
799
800 ack_cmd = SCB_ack(status);
801 scb_command(dev, ack_cmd);
802 outb(0,ioaddr+SIGNAL_CA);
803
804 eexp_cmd_clear(dev);
805
806 if (SCB_complete(status)) {
807 if (!eexp_hw_lasttxstat(dev)) {
808 printk("%s: tx interrupt but no status\n", dev->name);
809 }
810 }
811
812 if (SCB_rxdframe(status))
813 eexp_hw_rx_pio(dev);
814
815 status = scb_status(dev);
816 } while (status & 0xc000);
817
818 if (SCB_RUdead(status))
819 {
820 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
821 dev->name,status);
822 #if 0
823 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
824 outw(lp->cur_rfd, ioaddr+READ_PTR);
825 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
826 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
827 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
828 outw(rbd, ioaddr+READ_PTR);
829 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
830 outw(rbd+8, ioaddr+READ_PTR);
831 printk("[%04x]\n", inw(ioaddr+DATAPORT));
832 #endif
833 dev->stats.rx_errors++;
834 #if 1
835 eexp_hw_rxinit(dev);
836 #else
837 lp->cur_rfd = lp->first_rfd;
838 #endif
839 scb_wrrfa(dev, lp->rx_buf_start);
840 scb_command(dev, SCB_RUstart);
841 outb(0,ioaddr+SIGNAL_CA);
842 }
843 } else {
844 if (status & 0x8000)
845 ack_cmd = eexp_start_irq(dev, status);
846 else
847 ack_cmd = SCB_ack(status);
848 scb_command(dev, ack_cmd);
849 outb(0,ioaddr+SIGNAL_CA);
850 }
851
852 eexp_cmd_clear(dev);
853
854 outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
855
856 #if NET_DEBUG > 6
857 printk("%s: leaving eexp_irq()\n", dev->name);
858 #endif
859 outw(old_read_ptr, ioaddr+READ_PTR);
860 outw(old_write_ptr, ioaddr+WRITE_PTR);
861
862 spin_unlock(&lp->lock);
863 return IRQ_HANDLED;
864 }
865
866 /*
867 * Hardware access functions
868 */
869
870 /*
871 * Set the cable type to use.
872 */
873
874 static void eexp_hw_set_interface(struct net_device *dev)
875 {
876 unsigned char oldval = inb(dev->base_addr + 0x300e);
877 oldval &= ~0x82;
878 switch (dev->if_port) {
879 case TPE:
880 oldval |= 0x2;
881 case BNC:
882 oldval |= 0x80;
883 break;
884 }
885 outb(oldval, dev->base_addr+0x300e);
886 mdelay(20);
887 }
888
889 /*
890 * Check all the receive buffers, and hand any received packets
891 * to the upper levels. Basic sanity check on each frame
892 * descriptor, though we don't bother trying to fix broken ones.
893 */
894
895 static void eexp_hw_rx_pio(struct net_device *dev)
896 {
897 struct net_local *lp = netdev_priv(dev);
898 unsigned short rx_block = lp->rx_ptr;
899 unsigned short boguscount = lp->num_rx_bufs;
900 unsigned short ioaddr = dev->base_addr;
901 unsigned short status;
902
903 #if NET_DEBUG > 6
904 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
905 #endif
906
907 do {
908 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
909
910 outw(rx_block, ioaddr + READ_PTR);
911 status = inw(ioaddr + DATAPORT);
912
913 if (FD_Done(status))
914 {
915 rfd_cmd = inw(ioaddr + DATAPORT);
916 rx_next = inw(ioaddr + DATAPORT);
917 pbuf = inw(ioaddr + DATAPORT);
918
919 outw(pbuf, ioaddr + READ_PTR);
920 pkt_len = inw(ioaddr + DATAPORT);
921
922 if (rfd_cmd!=0x0000)
923 {
924 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
925 dev->name, rfd_cmd);
926 continue;
927 }
928 else if (pbuf!=rx_block+0x16)
929 {
930 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
931 dev->name, rx_block+0x16, pbuf);
932 continue;
933 }
934 else if ((pkt_len & 0xc000)!=0xc000)
935 {
936 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
937 dev->name, pkt_len & 0xc000);
938 continue;
939 }
940 else if (!FD_OK(status))
941 {
942 dev->stats.rx_errors++;
943 if (FD_CRC(status))
944 dev->stats.rx_crc_errors++;
945 if (FD_Align(status))
946 dev->stats.rx_frame_errors++;
947 if (FD_Resrc(status))
948 dev->stats.rx_fifo_errors++;
949 if (FD_DMA(status))
950 dev->stats.rx_over_errors++;
951 if (FD_Short(status))
952 dev->stats.rx_length_errors++;
953 }
954 else
955 {
956 struct sk_buff *skb;
957 pkt_len &= 0x3fff;
958 skb = dev_alloc_skb(pkt_len+16);
959 if (skb == NULL)
960 {
961 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
962 dev->stats.rx_dropped++;
963 break;
964 }
965 skb_reserve(skb, 2);
966 outw(pbuf+10, ioaddr+READ_PTR);
967 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
968 skb->protocol = eth_type_trans(skb,dev);
969 netif_rx(skb);
970 dev->last_rx = jiffies;
971 dev->stats.rx_packets++;
972 dev->stats.rx_bytes += pkt_len;
973 }
974 outw(rx_block, ioaddr+WRITE_PTR);
975 outw(0, ioaddr+DATAPORT);
976 outw(0, ioaddr+DATAPORT);
977 rx_block = rx_next;
978 }
979 } while (FD_Done(status) && boguscount--);
980 lp->rx_ptr = rx_block;
981 }
982
983 /*
984 * Hand a packet to the card for transmission
985 * If we get here, we MUST have already checked
986 * to make sure there is room in the transmit
987 * buffer region.
988 */
989
990 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
991 unsigned short len)
992 {
993 struct net_local *lp = netdev_priv(dev);
994 unsigned short ioaddr = dev->base_addr;
995
996 if (LOCKUP16 || lp->width) {
997 /* Stop the CU so that there is no chance that it
998 jumps off to a bogus address while we are writing the
999 pointer to the next transmit packet in 8-bit mode --
1000 this eliminates the "CU wedged" errors in 8-bit mode.
1001 (Zoltan Szilagyi 10-12-96) */
1002 scb_command(dev, SCB_CUsuspend);
1003 outw(0xFFFF, ioaddr+SIGNAL_CA);
1004 }
1005
1006 outw(lp->tx_head, ioaddr + WRITE_PTR);
1007
1008 outw(0x0000, ioaddr + DATAPORT);
1009 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1010 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1011 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1012
1013 outw(0x0000, ioaddr + DATAPORT);
1014 outw(0x0000, ioaddr + DATAPORT);
1015 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1016
1017 outw(0x8000|len, ioaddr + DATAPORT);
1018 outw(-1, ioaddr + DATAPORT);
1019 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1020 outw(0, ioaddr + DATAPORT);
1021
1022 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1023
1024 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1025 outw(lp->tx_head, ioaddr + DATAPORT);
1026
1027 dev->trans_start = jiffies;
1028 lp->tx_tail = lp->tx_head;
1029 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1030 lp->tx_head = TX_BUF_START;
1031 else
1032 lp->tx_head += TX_BUF_SIZE;
1033 if (lp->tx_head != lp->tx_reap)
1034 netif_wake_queue(dev);
1035
1036 if (LOCKUP16 || lp->width) {
1037 /* Restart the CU so that the packet can actually
1038 be transmitted. (Zoltan Szilagyi 10-12-96) */
1039 scb_command(dev, SCB_CUresume);
1040 outw(0xFFFF, ioaddr+SIGNAL_CA);
1041 }
1042
1043 dev->stats.tx_packets++;
1044 lp->last_tx = jiffies;
1045 }
1046
1047 /*
1048 * Sanity check the suspected EtherExpress card
1049 * Read hardware address, reset card, size memory and initialize buffer
1050 * memory pointers. These are held in dev->priv, in case someone has more
1051 * than one card in a machine.
1052 */
1053
1054 static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1055 {
1056 unsigned short hw_addr[3];
1057 unsigned char buswidth;
1058 unsigned int memory_size;
1059 int i;
1060 unsigned short xsum = 0;
1061 struct net_local *lp = netdev_priv(dev);
1062
1063 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1064
1065 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1066 outb(0, ioaddr+EEPROM_Ctrl);
1067 udelay(500);
1068 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1069
1070 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1071 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1072 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1073
1074 /* Standard Address or Compaq LTE Address */
1075 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
1076 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1077 {
1078 printk(" rejected: invalid address %04x%04x%04x\n",
1079 hw_addr[2],hw_addr[1],hw_addr[0]);
1080 return -ENODEV;
1081 }
1082
1083 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1084 * though.
1085 */
1086 for (i = 0; i < 64; i++)
1087 xsum += eexp_hw_readeeprom(ioaddr, i);
1088 if (xsum != 0xbaba)
1089 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1090
1091 dev->base_addr = ioaddr;
1092 for ( i=0 ; i<6 ; i++ )
1093 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1094
1095 {
1096 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1097 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1098
1099 /* Use the IRQ from EEPROM if none was given */
1100 if (!dev->irq)
1101 dev->irq = irqmap[setupval>>13];
1102
1103 if (dev->if_port == 0xff) {
1104 dev->if_port = !(setupval & 0x1000) ? AUI :
1105 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1106 }
1107
1108 buswidth = !((setupval & 0x400) >> 10);
1109 }
1110
1111 memset(lp, 0, sizeof(struct net_local));
1112 spin_lock_init(&lp->lock);
1113
1114 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1115 eexp_ifmap[dev->if_port], buswidth?8:16);
1116
1117 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1118 return -EBUSY;
1119
1120 eexp_hw_set_interface(dev);
1121
1122 release_region(dev->base_addr + 0x300e, 1);
1123
1124 /* Find out how much RAM we have on the card */
1125 outw(0, dev->base_addr + WRITE_PTR);
1126 for (i = 0; i < 32768; i++)
1127 outw(0, dev->base_addr + DATAPORT);
1128
1129 for (memory_size = 0; memory_size < 64; memory_size++)
1130 {
1131 outw(memory_size<<10, dev->base_addr + READ_PTR);
1132 if (inw(dev->base_addr+DATAPORT))
1133 break;
1134 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1135 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1136 outw(memory_size<<10, dev->base_addr + READ_PTR);
1137 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1138 break;
1139 }
1140
1141 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1142 * of RAM to play with.
1143 */
1144 lp->num_tx_bufs = 4;
1145 lp->rx_buf_end = 0x3ff6;
1146 switch (memory_size)
1147 {
1148 case 64:
1149 lp->rx_buf_end += 0x4000;
1150 case 48:
1151 lp->num_tx_bufs += 4;
1152 lp->rx_buf_end += 0x4000;
1153 case 32:
1154 lp->rx_buf_end += 0x4000;
1155 case 16:
1156 printk(", %dk RAM)\n", memory_size);
1157 break;
1158 default:
1159 printk(") bad memory size (%dk).\n", memory_size);
1160 return -ENODEV;
1161 break;
1162 }
1163
1164 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1165 lp->width = buswidth;
1166
1167 dev->open = eexp_open;
1168 dev->stop = eexp_close;
1169 dev->hard_start_xmit = eexp_xmit;
1170 dev->set_multicast_list = &eexp_set_multicast;
1171 dev->tx_timeout = eexp_timeout;
1172 dev->watchdog_timeo = 2*HZ;
1173
1174 return register_netdev(dev);
1175 }
1176
1177 /*
1178 * Read a word from the EtherExpress on-board serial EEPROM.
1179 * The EEPROM contains 64 words of 16 bits.
1180 */
1181 static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1182 unsigned char location)
1183 {
1184 unsigned short cmd = 0x180|(location&0x7f);
1185 unsigned short rval = 0,wval = EC_CS|i586_RST;
1186 int i;
1187
1188 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1189 for (i=0x100 ; i ; i>>=1 )
1190 {
1191 if (cmd&i)
1192 wval |= EC_Wr;
1193 else
1194 wval &= ~EC_Wr;
1195
1196 outb(wval,ioaddr+EEPROM_Ctrl);
1197 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1198 eeprom_delay();
1199 outb(wval,ioaddr+EEPROM_Ctrl);
1200 eeprom_delay();
1201 }
1202 wval &= ~EC_Wr;
1203 outb(wval,ioaddr+EEPROM_Ctrl);
1204 for (i=0x8000 ; i ; i>>=1 )
1205 {
1206 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1207 eeprom_delay();
1208 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1209 rval |= i;
1210 outb(wval,ioaddr+EEPROM_Ctrl);
1211 eeprom_delay();
1212 }
1213 wval &= ~EC_CS;
1214 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1215 eeprom_delay();
1216 outb(wval,ioaddr+EEPROM_Ctrl);
1217 eeprom_delay();
1218 return rval;
1219 }
1220
1221 /*
1222 * Reap tx buffers and return last transmit status.
1223 * if ==0 then either:
1224 * a) we're not transmitting anything, so why are we here?
1225 * b) we've died.
1226 * otherwise, Stat_Busy(return) means we've still got some packets
1227 * to transmit, Stat_Done(return) means our buffers should be empty
1228 * again
1229 */
1230
1231 static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1232 {
1233 struct net_local *lp = netdev_priv(dev);
1234 unsigned short tx_block = lp->tx_reap;
1235 unsigned short status;
1236
1237 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1238 return 0x0000;
1239
1240 do
1241 {
1242 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1243 status = inw(dev->base_addr + SHADOW(tx_block));
1244 if (!Stat_Done(status))
1245 {
1246 lp->tx_link = tx_block;
1247 return status;
1248 }
1249 else
1250 {
1251 lp->last_tx_restart = 0;
1252 dev->stats.collisions += Stat_NoColl(status);
1253 if (!Stat_OK(status))
1254 {
1255 char *whatsup = NULL;
1256 dev->stats.tx_errors++;
1257 if (Stat_Abort(status))
1258 dev->stats.tx_aborted_errors++;
1259 if (Stat_TNoCar(status)) {
1260 whatsup = "aborted, no carrier";
1261 dev->stats.tx_carrier_errors++;
1262 }
1263 if (Stat_TNoCTS(status)) {
1264 whatsup = "aborted, lost CTS";
1265 dev->stats.tx_carrier_errors++;
1266 }
1267 if (Stat_TNoDMA(status)) {
1268 whatsup = "FIFO underran";
1269 dev->stats.tx_fifo_errors++;
1270 }
1271 if (Stat_TXColl(status)) {
1272 whatsup = "aborted, too many collisions";
1273 dev->stats.tx_aborted_errors++;
1274 }
1275 if (whatsup)
1276 printk(KERN_INFO "%s: transmit %s\n",
1277 dev->name, whatsup);
1278 }
1279 else
1280 dev->stats.tx_packets++;
1281 }
1282 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1283 lp->tx_reap = tx_block = TX_BUF_START;
1284 else
1285 lp->tx_reap = tx_block += TX_BUF_SIZE;
1286 netif_wake_queue(dev);
1287 }
1288 while (lp->tx_reap != lp->tx_head);
1289
1290 lp->tx_link = lp->tx_tail + 0x08;
1291
1292 return status;
1293 }
1294
1295 /*
1296 * This should never happen. It is called when some higher routine detects
1297 * that the CU has stopped, to try to restart it from the last packet we knew
1298 * we were working on, or the idle loop if we had finished for the time.
1299 */
1300
1301 static void eexp_hw_txrestart(struct net_device *dev)
1302 {
1303 struct net_local *lp = netdev_priv(dev);
1304 unsigned short ioaddr = dev->base_addr;
1305
1306 lp->last_tx_restart = lp->tx_link;
1307 scb_wrcbl(dev, lp->tx_link);
1308 scb_command(dev, SCB_CUstart);
1309 outb(0,ioaddr+SIGNAL_CA);
1310
1311 {
1312 unsigned short boguscount=50,failcount=5;
1313 while (!scb_status(dev))
1314 {
1315 if (!--boguscount)
1316 {
1317 if (--failcount)
1318 {
1319 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1320 scb_wrcbl(dev, lp->tx_link);
1321 scb_command(dev, SCB_CUstart);
1322 outb(0,ioaddr+SIGNAL_CA);
1323 boguscount = 100;
1324 }
1325 else
1326 {
1327 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1328 eexp_hw_init586(dev);
1329 netif_wake_queue(dev);
1330 return;
1331 }
1332 }
1333 }
1334 }
1335 }
1336
1337 /*
1338 * Writes down the list of transmit buffers into card memory. Each
1339 * entry consists of an 82586 transmit command, followed by a jump
1340 * pointing to itself. When we want to transmit a packet, we write
1341 * the data into the appropriate transmit buffer and then modify the
1342 * preceding jump to point at the new transmit command. This means that
1343 * the 586 command unit is continuously active.
1344 */
1345
1346 static void eexp_hw_txinit(struct net_device *dev)
1347 {
1348 struct net_local *lp = netdev_priv(dev);
1349 unsigned short tx_block = TX_BUF_START;
1350 unsigned short curtbuf;
1351 unsigned short ioaddr = dev->base_addr;
1352
1353 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1354 {
1355 outw(tx_block, ioaddr + WRITE_PTR);
1356
1357 outw(0x0000, ioaddr + DATAPORT);
1358 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1359 outw(tx_block+0x08, ioaddr + DATAPORT);
1360 outw(tx_block+0x0e, ioaddr + DATAPORT);
1361
1362 outw(0x0000, ioaddr + DATAPORT);
1363 outw(0x0000, ioaddr + DATAPORT);
1364 outw(tx_block+0x08, ioaddr + DATAPORT);
1365
1366 outw(0x8000, ioaddr + DATAPORT);
1367 outw(-1, ioaddr + DATAPORT);
1368 outw(tx_block+0x16, ioaddr + DATAPORT);
1369 outw(0x0000, ioaddr + DATAPORT);
1370
1371 tx_block += TX_BUF_SIZE;
1372 }
1373 lp->tx_head = TX_BUF_START;
1374 lp->tx_reap = TX_BUF_START;
1375 lp->tx_tail = tx_block - TX_BUF_SIZE;
1376 lp->tx_link = lp->tx_tail + 0x08;
1377 lp->rx_buf_start = tx_block;
1378
1379 }
1380
1381 /*
1382 * Write the circular list of receive buffer descriptors to card memory.
1383 * The end of the list isn't marked, which means that the 82586 receive
1384 * unit will loop until buffers become available (this avoids it giving us
1385 * "out of resources" messages).
1386 */
1387
1388 static void eexp_hw_rxinit(struct net_device *dev)
1389 {
1390 struct net_local *lp = netdev_priv(dev);
1391 unsigned short rx_block = lp->rx_buf_start;
1392 unsigned short ioaddr = dev->base_addr;
1393
1394 lp->num_rx_bufs = 0;
1395 lp->rx_first = lp->rx_ptr = rx_block;
1396 do
1397 {
1398 lp->num_rx_bufs++;
1399
1400 outw(rx_block, ioaddr + WRITE_PTR);
1401
1402 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1403 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1404 outw(0xffff, ioaddr+DATAPORT);
1405
1406 outw(0x0000, ioaddr+DATAPORT);
1407 outw(0xdead, ioaddr+DATAPORT);
1408 outw(0xdead, ioaddr+DATAPORT);
1409 outw(0xdead, ioaddr+DATAPORT);
1410 outw(0xdead, ioaddr+DATAPORT);
1411 outw(0xdead, ioaddr+DATAPORT);
1412 outw(0xdead, ioaddr+DATAPORT);
1413
1414 outw(0x0000, ioaddr+DATAPORT);
1415 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1416 outw(rx_block + 0x20, ioaddr+DATAPORT);
1417 outw(0, ioaddr+DATAPORT);
1418 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1419
1420 lp->rx_last = rx_block;
1421 rx_block += RX_BUF_SIZE;
1422 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1423
1424
1425 /* Make first Rx frame descriptor point to first Rx buffer
1426 descriptor */
1427 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1428 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1429
1430 /* Close Rx frame descriptor ring */
1431 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1432 outw(lp->rx_first, ioaddr+DATAPORT);
1433
1434 /* Close Rx buffer descriptor ring */
1435 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1436 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1437
1438 }
1439
1440 /*
1441 * Un-reset the 586, and start the configuration sequence. We don't wait for
1442 * this to finish, but allow the interrupt handler to start the CU and RU for
1443 * us. We can't start the receive/transmission system up before we know that
1444 * the hardware is configured correctly.
1445 */
1446
1447 static void eexp_hw_init586(struct net_device *dev)
1448 {
1449 struct net_local *lp = netdev_priv(dev);
1450 unsigned short ioaddr = dev->base_addr;
1451 int i;
1452
1453 #if NET_DEBUG > 6
1454 printk("%s: eexp_hw_init586()\n", dev->name);
1455 #endif
1456
1457 lp->started = 0;
1458
1459 set_loopback(dev);
1460
1461 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1462
1463 /* Download the startup code */
1464 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1465 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1466 outw(0x0000, ioaddr + 0x8008);
1467 outw(0x0000, ioaddr + 0x800a);
1468 outw(0x0000, ioaddr + 0x800c);
1469 outw(0x0000, ioaddr + 0x800e);
1470
1471 for (i = 0; i < (sizeof(start_code)); i+=32) {
1472 int j;
1473 outw(i, ioaddr + SM_PTR);
1474 for (j = 0; j < 16; j+=2)
1475 outw(start_code[(i+j)/2],
1476 ioaddr+0x4000+j);
1477 for (j = 0; j < 16; j+=2)
1478 outw(start_code[(i+j+16)/2],
1479 ioaddr+0x8000+j);
1480 }
1481
1482 /* Do we want promiscuous mode or multicast? */
1483 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1484 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1485 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1486 ioaddr+SHADOW(CONF_PROMISC));
1487 lp->was_promisc = dev->flags & IFF_PROMISC;
1488 #if 0
1489 eexp_setup_filter(dev);
1490 #endif
1491
1492 /* Write our hardware address */
1493 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1494 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
1495 outw(((unsigned short *)dev->dev_addr)[1],
1496 ioaddr+SHADOW(CONF_HWADDR+2));
1497 outw(((unsigned short *)dev->dev_addr)[2],
1498 ioaddr+SHADOW(CONF_HWADDR+4));
1499
1500 eexp_hw_txinit(dev);
1501 eexp_hw_rxinit(dev);
1502
1503 outb(0,ioaddr+EEPROM_Ctrl);
1504 mdelay(5);
1505
1506 scb_command(dev, 0xf000);
1507 outb(0,ioaddr+SIGNAL_CA);
1508
1509 outw(0, ioaddr+SM_PTR);
1510
1511 {
1512 unsigned short rboguscount=50,rfailcount=5;
1513 while (inw(ioaddr+0x4000))
1514 {
1515 if (!--rboguscount)
1516 {
1517 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1518 dev->name);
1519 scb_command(dev, 0);
1520 outb(0,ioaddr+SIGNAL_CA);
1521 rboguscount = 100;
1522 if (!--rfailcount)
1523 {
1524 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1525 dev->name);
1526 return;
1527 }
1528 }
1529 }
1530 }
1531
1532 scb_wrcbl(dev, CONF_LINK);
1533 scb_command(dev, 0xf000|SCB_CUstart);
1534 outb(0,ioaddr+SIGNAL_CA);
1535
1536 {
1537 unsigned short iboguscount=50,ifailcount=5;
1538 while (!scb_status(dev))
1539 {
1540 if (!--iboguscount)
1541 {
1542 if (--ifailcount)
1543 {
1544 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1545 dev->name, scb_status(dev), scb_rdcmd(dev));
1546 scb_wrcbl(dev, CONF_LINK);
1547 scb_command(dev, 0xf000|SCB_CUstart);
1548 outb(0,ioaddr+SIGNAL_CA);
1549 iboguscount = 100;
1550 }
1551 else
1552 {
1553 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1554 return;
1555 }
1556 }
1557 }
1558 }
1559
1560 clear_loopback(dev);
1561 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1562
1563 lp->init_time = jiffies;
1564 #if NET_DEBUG > 6
1565 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1566 #endif
1567 return;
1568 }
1569
1570 static void eexp_setup_filter(struct net_device *dev)
1571 {
1572 struct dev_mc_list *dmi = dev->mc_list;
1573 unsigned short ioaddr = dev->base_addr;
1574 int count = dev->mc_count;
1575 int i;
1576 if (count > 8) {
1577 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1578 dev->name, count);
1579 count = 8;
1580 }
1581
1582 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1583 outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1584 for (i = 0; i < count; i++) {
1585 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1586 if (!dmi) {
1587 printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1588 break;
1589 }
1590 if (dmi->dmi_addrlen != ETH_ALEN) {
1591 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1592 continue;
1593 }
1594 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1595 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1596 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1597 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1598 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1599 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1600 }
1601 }
1602
1603 /*
1604 * Set or clear the multicast filter for this adaptor.
1605 */
1606 static void
1607 eexp_set_multicast(struct net_device *dev)
1608 {
1609 unsigned short ioaddr = dev->base_addr;
1610 struct net_local *lp = netdev_priv(dev);
1611 int kick = 0, i;
1612 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1613 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1614 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1615 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1616 ioaddr+SHADOW(CONF_PROMISC));
1617 lp->was_promisc = dev->flags & IFF_PROMISC;
1618 kick = 1;
1619 }
1620 if (!(dev->flags & IFF_PROMISC)) {
1621 eexp_setup_filter(dev);
1622 if (lp->old_mc_count != dev->mc_count) {
1623 kick = 1;
1624 lp->old_mc_count = dev->mc_count;
1625 }
1626 }
1627 if (kick) {
1628 unsigned long oj;
1629 scb_command(dev, SCB_CUsuspend);
1630 outb(0, ioaddr+SIGNAL_CA);
1631 outb(0, ioaddr+SIGNAL_CA);
1632 #if 0
1633 printk("%s: waiting for CU to go suspended\n", dev->name);
1634 #endif
1635 oj = jiffies;
1636 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1637 (time_before(jiffies, oj + 2000)));
1638 if (SCB_CUstat(scb_status(dev)) == 2)
1639 printk("%s: warning, CU didn't stop\n", dev->name);
1640 lp->started &= ~(STARTED_CU);
1641 scb_wrcbl(dev, CONF_LINK);
1642 scb_command(dev, SCB_CUstart);
1643 outb(0, ioaddr+SIGNAL_CA);
1644 }
1645 }
1646
1647
1648 /*
1649 * MODULE stuff
1650 */
1651
1652 #ifdef MODULE
1653
1654 #define EEXP_MAX_CARDS 4 /* max number of cards to support */
1655
1656 static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1657 static int irq[EEXP_MAX_CARDS];
1658 static int io[EEXP_MAX_CARDS];
1659
1660 module_param_array(io, int, NULL, 0);
1661 module_param_array(irq, int, NULL, 0);
1662 MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1663 MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1664 MODULE_LICENSE("GPL");
1665
1666
1667 /* Ideally the user would give us io=, irq= for every card. If any parameters
1668 * are specified, we verify and then use them. If no parameters are given, we
1669 * autoprobe for one card only.
1670 */
1671 int __init init_module(void)
1672 {
1673 struct net_device *dev;
1674 int this_dev, found = 0;
1675
1676 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1677 dev = alloc_etherdev(sizeof(struct net_local));
1678 dev->irq = irq[this_dev];
1679 dev->base_addr = io[this_dev];
1680 if (io[this_dev] == 0) {
1681 if (this_dev)
1682 break;
1683 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1684 }
1685 if (do_express_probe(dev) == 0) {
1686 dev_eexp[this_dev] = dev;
1687 found++;
1688 continue;
1689 }
1690 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1691 free_netdev(dev);
1692 break;
1693 }
1694 if (found)
1695 return 0;
1696 return -ENXIO;
1697 }
1698
1699 void __exit cleanup_module(void)
1700 {
1701 int this_dev;
1702
1703 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1704 struct net_device *dev = dev_eexp[this_dev];
1705 if (dev) {
1706 unregister_netdev(dev);
1707 free_netdev(dev);
1708 }
1709 }
1710 }
1711 #endif
1712
1713 /*
1714 * Local Variables:
1715 * c-file-style: "linux"
1716 * tab-width: 8
1717 * End:
1718 */
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