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[PATCH] add bottom_half.h
[linux-2.6/openmoko-kernel.git] / drivers / net / eexpress.c
blobe14be020e5624b2f5f999b1d90a0771cb0004f69
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
119 #include <asm/system.h>
120 #include <asm/io.h>
121 #include <asm/irq.h>
122
123 #ifndef NET_DEBUG
124 #define NET_DEBUG 4
125 #endif
126
127 #include "eexpress.h"
128
129 #define EEXP_IO_EXTENT 16
130
131 /*
132 * Private data declarations
133 */
134
135 struct net_local
136 {
137 struct net_device_stats stats;
138 unsigned long last_tx; /* jiffies when last transmit started */
139 unsigned long init_time; /* jiffies when eexp_hw_init586 called */
140 unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
141 unsigned short rx_last; /* last rx buf */
142 unsigned short rx_ptr; /* first rx buf to look at */
143 unsigned short tx_head; /* next free tx buf */
144 unsigned short tx_reap; /* first in-use tx buf */
145 unsigned short tx_tail; /* previous tx buf to tx_head */
146 unsigned short tx_link; /* last known-executing tx buf */
147 unsigned short last_tx_restart; /* set to tx_link when we
148 restart the CU */
149 unsigned char started;
150 unsigned short rx_buf_start;
151 unsigned short rx_buf_end;
152 unsigned short num_tx_bufs;
153 unsigned short num_rx_bufs;
154 unsigned char width; /* 0 for 16bit, 1 for 8bit */
155 unsigned char was_promisc;
156 unsigned char old_mc_count;
157 spinlock_t lock;
158 };
159
160 /* This is the code and data that is downloaded to the EtherExpress card's
161 * memory at boot time.
162 */
163
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 struct net_device_stats *eexp_stats(struct net_device *dev);
250 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
251
252 static irqreturn_t eexp_irq(int irq, void *dev_addr);
253 static void eexp_set_multicast(struct net_device *dev);
254
255 /*
256 * Prototypes for hardware access functions
257 */
258
259 static void eexp_hw_rx_pio(struct net_device *dev);
260 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
261 unsigned short len);
262 static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
263 static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
264 unsigned char location);
265
266 static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
267 static void eexp_hw_txrestart(struct net_device *dev);
268
269 static void eexp_hw_txinit (struct net_device *dev);
270 static void eexp_hw_rxinit (struct net_device *dev);
271
272 static void eexp_hw_init586 (struct net_device *dev);
273 static void eexp_setup_filter (struct net_device *dev);
274
275 static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
276 enum eexp_iftype {AUI=0, BNC=1, TPE=2};
277
278 #define STARTED_RU 2
279 #define STARTED_CU 1
280
281 /*
282 * Primitive hardware access functions.
283 */
284
285 static inline unsigned short scb_status(struct net_device *dev)
286 {
287 return inw(dev->base_addr + 0xc008);
288 }
289
290 static inline unsigned short scb_rdcmd(struct net_device *dev)
291 {
292 return inw(dev->base_addr + 0xc00a);
293 }
294
295 static inline void scb_command(struct net_device *dev, unsigned short cmd)
296 {
297 outw(cmd, dev->base_addr + 0xc00a);
298 }
299
300 static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
301 {
302 outw(val, dev->base_addr + 0xc00c);
303 }
304
305 static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
306 {
307 outw(val, dev->base_addr + 0xc00e);
308 }
309
310 static inline void set_loopback(struct net_device *dev)
311 {
312 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
313 }
314
315 static inline void clear_loopback(struct net_device *dev)
316 {
317 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
318 }
319
320 static inline unsigned short int SHADOW(short int addr)
321 {
322 addr &= 0x1f;
323 if (addr > 0xf) addr += 0x3ff0;
324 return addr + 0x4000;
325 }
326
327 /*
328 * Linux interface
329 */
330
331 /*
332 * checks for presence of EtherExpress card
333 */
334
335 static int __init do_express_probe(struct net_device *dev)
336 {
337 unsigned short *port;
338 static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
339 unsigned short ioaddr = dev->base_addr;
340 int dev_irq = dev->irq;
341 int err;
342
343 SET_MODULE_OWNER(dev);
344
345 dev->if_port = 0xff; /* not set */
346
347 #ifdef CONFIG_MCA_LEGACY
348 if (MCA_bus) {
349 int slot = 0;
350
351 /*
352 * Only find one card at a time. Subsequent calls
353 * will find others, however, proper multicard MCA
354 * probing and setup can't be done with the
355 * old-style Space.c init routines. -- ASF
356 */
357 while (slot != MCA_NOTFOUND) {
358 int pos0, pos1;
359
360 slot = mca_find_unused_adapter(0x628B, slot);
361 if (slot == MCA_NOTFOUND)
362 break;
363
364 pos0 = mca_read_stored_pos(slot, 2);
365 pos1 = mca_read_stored_pos(slot, 3);
366 ioaddr = mca_iomap[pos1&0xf];
367
368 dev->irq = mca_irqmap[(pos1>>4)&0x7];
369
370 /*
371 * XXX: Transciever selection is done
372 * differently on the MCA version.
373 * How to get it to select something
374 * other than external/AUI is currently
375 * unknown. This code is just for looks. -- ASF
376 */
377 if ((pos0 & 0x7) == 0x1)
378 dev->if_port = AUI;
379 else if ((pos0 & 0x7) == 0x5) {
380 if (pos1 & 0x80)
381 dev->if_port = BNC;
382 else
383 dev->if_port = TPE;
384 }
385
386 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
387 mca_set_adapter_procfn(slot, NULL, dev);
388 mca_mark_as_used(slot);
389
390 break;
391 }
392 }
393 #endif
394 if (ioaddr&0xfe00) {
395 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
396 return -EBUSY;
397 err = eexp_hw_probe(dev,ioaddr);
398 release_region(ioaddr, EEXP_IO_EXTENT);
399 return err;
400 } else if (ioaddr)
401 return -ENXIO;
402
403 for (port=&ports[0] ; *port ; port++ )
404 {
405 unsigned short sum = 0;
406 int i;
407 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
408 continue;
409 for ( i=0 ; i<4 ; i++ )
410 {
411 unsigned short t;
412 t = inb(*port + ID_PORT);
413 sum |= (t>>4) << ((t & 0x03)<<2);
414 }
415 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
416 release_region(*port, EEXP_IO_EXTENT);
417 return 0;
418 }
419 release_region(*port, EEXP_IO_EXTENT);
420 dev->irq = dev_irq;
421 }
422 return -ENODEV;
423 }
424
425 #ifndef MODULE
426 struct net_device * __init express_probe(int unit)
427 {
428 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
429 int err;
430
431 if (!dev)
432 return ERR_PTR(-ENOMEM);
433
434 sprintf(dev->name, "eth%d", unit);
435 netdev_boot_setup_check(dev);
436
437 err = do_express_probe(dev);
438 if (!err)
439 return dev;
440 free_netdev(dev);
441 return ERR_PTR(err);
442 }
443 #endif
444
445 /*
446 * open and initialize the adapter, ready for use
447 */
448
449 static int eexp_open(struct net_device *dev)
450 {
451 int ret;
452 unsigned short ioaddr = dev->base_addr;
453 struct net_local *lp = netdev_priv(dev);
454
455 #if NET_DEBUG > 6
456 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
457 #endif
458
459 if (!dev->irq || !irqrmap[dev->irq])
460 return -ENXIO;
461
462 ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
463 if (ret) return ret;
464
465 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
466 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
467 , ioaddr);
468 goto err_out1;
469 }
470 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
471 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
472 , ioaddr+0x4000);
473 goto err_out2;
474 }
475 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
476 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
477 , ioaddr+0x8000);
478 goto err_out3;
479 }
480 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
481 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
482 , ioaddr+0xc000);
483 goto err_out4;
484 }
485
486 if (lp->width) {
487 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
488 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
489 }
490
491 eexp_hw_init586(dev);
492 netif_start_queue(dev);
493 #if NET_DEBUG > 6
494 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
495 #endif
496 return 0;
497
498 err_out4:
499 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
500 err_out3:
501 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
502 err_out2:
503 release_region(ioaddr, EEXP_IO_EXTENT);
504 err_out1:
505 free_irq(dev->irq, dev);
506 return -EBUSY;
507 }
508
509 /*
510 * close and disable the interface, leaving the 586 in reset.
511 */
512
513 static int eexp_close(struct net_device *dev)
514 {
515 unsigned short ioaddr = dev->base_addr;
516 struct net_local *lp = netdev_priv(dev);
517
518 int irq = dev->irq;
519
520 netif_stop_queue(dev);
521
522 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
523 lp->started = 0;
524 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
525 outb(0,ioaddr+SIGNAL_CA);
526 free_irq(irq,dev);
527 outb(i586_RST,ioaddr+EEPROM_Ctrl);
528 release_region(ioaddr, EEXP_IO_EXTENT);
529 release_region(ioaddr+0x4000, 16);
530 release_region(ioaddr+0x8000, 16);
531 release_region(ioaddr+0xc000, 16);
532
533 return 0;
534 }
535
536 /*
537 * Return interface stats
538 */
539
540 static struct net_device_stats *eexp_stats(struct net_device *dev)
541 {
542 struct net_local *lp = netdev_priv(dev);
543
544 return &lp->stats;
545 }
546
547 /*
548 * This gets called when a higher level thinks we are broken. Check that
549 * nothing has become jammed in the CU.
550 */
551
552 static void unstick_cu(struct net_device *dev)
553 {
554 struct net_local *lp = netdev_priv(dev);
555 unsigned short ioaddr = dev->base_addr;
556
557 if (lp->started)
558 {
559 if ((jiffies - dev->trans_start)>50)
560 {
561 if (lp->tx_link==lp->last_tx_restart)
562 {
563 unsigned short boguscount=200,rsst;
564 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
565 dev->name, scb_status(dev));
566 eexp_hw_txinit(dev);
567 lp->last_tx_restart = 0;
568 scb_wrcbl(dev, lp->tx_link);
569 scb_command(dev, SCB_CUstart);
570 outb(0,ioaddr+SIGNAL_CA);
571 while (!SCB_complete(rsst=scb_status(dev)))
572 {
573 if (!--boguscount)
574 {
575 boguscount=200;
576 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
577 dev->name,rsst);
578 scb_wrcbl(dev, lp->tx_link);
579 scb_command(dev, SCB_CUstart);
580 outb(0,ioaddr+SIGNAL_CA);
581 }
582 }
583 netif_wake_queue(dev);
584 }
585 else
586 {
587 unsigned short status = scb_status(dev);
588 if (SCB_CUdead(status))
589 {
590 unsigned short txstatus = eexp_hw_lasttxstat(dev);
591 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
592 dev->name, status, txstatus);
593 eexp_hw_txrestart(dev);
594 }
595 else
596 {
597 unsigned short txstatus = eexp_hw_lasttxstat(dev);
598 if (netif_queue_stopped(dev) && !txstatus)
599 {
600 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
601 dev->name,status,txstatus);
602 eexp_hw_init586(dev);
603 netif_wake_queue(dev);
604 }
605 else
606 {
607 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
608 }
609 }
610 }
611 }
612 }
613 else
614 {
615 if ((jiffies-lp->init_time)>10)
616 {
617 unsigned short status = scb_status(dev);
618 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
619 dev->name, status);
620 eexp_hw_init586(dev);
621 netif_wake_queue(dev);
622 }
623 }
624 }
625
626 static void eexp_timeout(struct net_device *dev)
627 {
628 struct net_local *lp = netdev_priv(dev);
629 #ifdef CONFIG_SMP
630 unsigned long flags;
631 #endif
632 int status;
633
634 disable_irq(dev->irq);
635
636 /*
637 * Best would be to use synchronize_irq(); spin_lock() here
638 * lets make it work first..
639 */
640
641 #ifdef CONFIG_SMP
642 spin_lock_irqsave(&lp->lock, flags);
643 #endif
644
645 status = scb_status(dev);
646 unstick_cu(dev);
647 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
648 (SCB_complete(status)?"lost interrupt":
649 "board on fire"));
650 lp->stats.tx_errors++;
651 lp->last_tx = jiffies;
652 if (!SCB_complete(status)) {
653 scb_command(dev, SCB_CUabort);
654 outb(0,dev->base_addr+SIGNAL_CA);
655 }
656 netif_wake_queue(dev);
657 #ifdef CONFIG_SMP
658 spin_unlock_irqrestore(&lp->lock, flags);
659 #endif
660 }
661
662 /*
663 * Called to transmit a packet, or to allow us to right ourselves
664 * if the kernel thinks we've died.
665 */
666 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
667 {
668 struct net_local *lp = netdev_priv(dev);
669 short length = buf->len;
670 #ifdef CONFIG_SMP
671 unsigned long flags;
672 #endif
673
674 #if NET_DEBUG > 6
675 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
676 #endif
677
678 if (buf->len < ETH_ZLEN) {
679 if (skb_padto(buf, ETH_ZLEN))
680 return 0;
681 length = ETH_ZLEN;
682 }
683
684 disable_irq(dev->irq);
685
686 /*
687 * Best would be to use synchronize_irq(); spin_lock() here
688 * lets make it work first..
689 */
690
691 #ifdef CONFIG_SMP
692 spin_lock_irqsave(&lp->lock, flags);
693 #endif
694
695 {
696 unsigned short *data = (unsigned short *)buf->data;
697
698 lp->stats.tx_bytes += length;
699
700 eexp_hw_tx_pio(dev,data,length);
701 }
702 dev_kfree_skb(buf);
703 #ifdef CONFIG_SMP
704 spin_unlock_irqrestore(&lp->lock, flags);
705 #endif
706 enable_irq(dev->irq);
707 return 0;
708 }
709
710 /*
711 * Handle an EtherExpress interrupt
712 * If we've finished initializing, start the RU and CU up.
713 * If we've already started, reap tx buffers, handle any received packets,
714 * check to make sure we've not become wedged.
715 */
716
717 /*
718 * Handle an EtherExpress interrupt
719 * If we've finished initializing, start the RU and CU up.
720 * If we've already started, reap tx buffers, handle any received packets,
721 * check to make sure we've not become wedged.
722 */
723
724 static unsigned short eexp_start_irq(struct net_device *dev,
725 unsigned short status)
726 {
727 unsigned short ack_cmd = SCB_ack(status);
728 struct net_local *lp = netdev_priv(dev);
729 unsigned short ioaddr = dev->base_addr;
730 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
731 short diag_status, tdr_status;
732 while (SCB_CUstat(status)==2)
733 status = scb_status(dev);
734 #if NET_DEBUG > 4
735 printk("%s: CU went non-active (status %04x)\n",
736 dev->name, status);
737 #endif
738
739 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
740 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
741 if (diag_status & 1<<11) {
742 printk(KERN_WARNING "%s: 82586 failed self-test\n",
743 dev->name);
744 } else if (!(diag_status & 1<<13)) {
745 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
746 }
747
748 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
749 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
750 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
751 printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : "");
752 }
753 else if (tdr_status & TDR_XCVRPROBLEM) {
754 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
755 }
756 else if (tdr_status & TDR_LINKOK) {
757 #if NET_DEBUG > 4
758 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
759 #endif
760 } else {
761 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
762 tdr_status);
763 }
764
765 lp->started |= STARTED_CU;
766 scb_wrcbl(dev, lp->tx_link);
767 /* if the RU isn't running, start it now */
768 if (!(lp->started & STARTED_RU)) {
769 ack_cmd |= SCB_RUstart;
770 scb_wrrfa(dev, lp->rx_buf_start);
771 lp->rx_ptr = lp->rx_buf_start;
772 lp->started |= STARTED_RU;
773 }
774 ack_cmd |= SCB_CUstart | 0x2000;
775 }
776
777 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
778 lp->started|=STARTED_RU;
779
780 return ack_cmd;
781 }
782
783 static void eexp_cmd_clear(struct net_device *dev)
784 {
785 unsigned long int oldtime = jiffies;
786 while (scb_rdcmd(dev) && ((jiffies-oldtime)<10));
787 if (scb_rdcmd(dev)) {
788 printk("%s: command didn't clear\n", dev->name);
789 }
790 }
791
792 static irqreturn_t eexp_irq(int irq, void *dev_info)
793 {
794 struct net_device *dev = dev_info;
795 struct net_local *lp;
796 unsigned short ioaddr,status,ack_cmd;
797 unsigned short old_read_ptr, old_write_ptr;
798
799 lp = netdev_priv(dev);
800 ioaddr = dev->base_addr;
801
802 spin_lock(&lp->lock);
803
804 old_read_ptr = inw(ioaddr+READ_PTR);
805 old_write_ptr = inw(ioaddr+WRITE_PTR);
806
807 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
808
809
810 status = scb_status(dev);
811
812 #if NET_DEBUG > 4
813 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
814 #endif
815
816 if (lp->started == (STARTED_CU | STARTED_RU)) {
817
818 do {
819 eexp_cmd_clear(dev);
820
821 ack_cmd = SCB_ack(status);
822 scb_command(dev, ack_cmd);
823 outb(0,ioaddr+SIGNAL_CA);
824
825 eexp_cmd_clear(dev);
826
827 if (SCB_complete(status)) {
828 if (!eexp_hw_lasttxstat(dev)) {
829 printk("%s: tx interrupt but no status\n", dev->name);
830 }
831 }
832
833 if (SCB_rxdframe(status))
834 eexp_hw_rx_pio(dev);
835
836 status = scb_status(dev);
837 } while (status & 0xc000);
838
839 if (SCB_RUdead(status))
840 {
841 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
842 dev->name,status);
843 #if 0
844 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
845 outw(lp->cur_rfd, ioaddr+READ_PTR);
846 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
847 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
848 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
849 outw(rbd, ioaddr+READ_PTR);
850 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
851 outw(rbd+8, ioaddr+READ_PTR);
852 printk("[%04x]\n", inw(ioaddr+DATAPORT));
853 #endif
854 lp->stats.rx_errors++;
855 #if 1
856 eexp_hw_rxinit(dev);
857 #else
858 lp->cur_rfd = lp->first_rfd;
859 #endif
860 scb_wrrfa(dev, lp->rx_buf_start);
861 scb_command(dev, SCB_RUstart);
862 outb(0,ioaddr+SIGNAL_CA);
863 }
864 } else {
865 if (status & 0x8000)
866 ack_cmd = eexp_start_irq(dev, status);
867 else
868 ack_cmd = SCB_ack(status);
869 scb_command(dev, ack_cmd);
870 outb(0,ioaddr+SIGNAL_CA);
871 }
872
873 eexp_cmd_clear(dev);
874
875 outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
876
877 #if NET_DEBUG > 6
878 printk("%s: leaving eexp_irq()\n", dev->name);
879 #endif
880 outw(old_read_ptr, ioaddr+READ_PTR);
881 outw(old_write_ptr, ioaddr+WRITE_PTR);
882
883 spin_unlock(&lp->lock);
884 return IRQ_HANDLED;
885 }
886
887 /*
888 * Hardware access functions
889 */
890
891 /*
892 * Set the cable type to use.
893 */
894
895 static void eexp_hw_set_interface(struct net_device *dev)
896 {
897 unsigned char oldval = inb(dev->base_addr + 0x300e);
898 oldval &= ~0x82;
899 switch (dev->if_port) {
900 case TPE:
901 oldval |= 0x2;
902 case BNC:
903 oldval |= 0x80;
904 break;
905 }
906 outb(oldval, dev->base_addr+0x300e);
907 mdelay(20);
908 }
909
910 /*
911 * Check all the receive buffers, and hand any received packets
912 * to the upper levels. Basic sanity check on each frame
913 * descriptor, though we don't bother trying to fix broken ones.
914 */
915
916 static void eexp_hw_rx_pio(struct net_device *dev)
917 {
918 struct net_local *lp = netdev_priv(dev);
919 unsigned short rx_block = lp->rx_ptr;
920 unsigned short boguscount = lp->num_rx_bufs;
921 unsigned short ioaddr = dev->base_addr;
922 unsigned short status;
923
924 #if NET_DEBUG > 6
925 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
926 #endif
927
928 do {
929 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
930
931 outw(rx_block, ioaddr + READ_PTR);
932 status = inw(ioaddr + DATAPORT);
933
934 if (FD_Done(status))
935 {
936 rfd_cmd = inw(ioaddr + DATAPORT);
937 rx_next = inw(ioaddr + DATAPORT);
938 pbuf = inw(ioaddr + DATAPORT);
939
940 outw(pbuf, ioaddr + READ_PTR);
941 pkt_len = inw(ioaddr + DATAPORT);
942
943 if (rfd_cmd!=0x0000)
944 {
945 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
946 dev->name, rfd_cmd);
947 continue;
948 }
949 else if (pbuf!=rx_block+0x16)
950 {
951 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
952 dev->name, rx_block+0x16, pbuf);
953 continue;
954 }
955 else if ((pkt_len & 0xc000)!=0xc000)
956 {
957 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
958 dev->name, pkt_len & 0xc000);
959 continue;
960 }
961 else if (!FD_OK(status))
962 {
963 lp->stats.rx_errors++;
964 if (FD_CRC(status))
965 lp->stats.rx_crc_errors++;
966 if (FD_Align(status))
967 lp->stats.rx_frame_errors++;
968 if (FD_Resrc(status))
969 lp->stats.rx_fifo_errors++;
970 if (FD_DMA(status))
971 lp->stats.rx_over_errors++;
972 if (FD_Short(status))
973 lp->stats.rx_length_errors++;
974 }
975 else
976 {
977 struct sk_buff *skb;
978 pkt_len &= 0x3fff;
979 skb = dev_alloc_skb(pkt_len+16);
980 if (skb == NULL)
981 {
982 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
983 lp->stats.rx_dropped++;
984 break;
985 }
986 skb->dev = dev;
987 skb_reserve(skb, 2);
988 outw(pbuf+10, ioaddr+READ_PTR);
989 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
990 skb->protocol = eth_type_trans(skb,dev);
991 netif_rx(skb);
992 dev->last_rx = jiffies;
993 lp->stats.rx_packets++;
994 lp->stats.rx_bytes += pkt_len;
995 }
996 outw(rx_block, ioaddr+WRITE_PTR);
997 outw(0, ioaddr+DATAPORT);
998 outw(0, ioaddr+DATAPORT);
999 rx_block = rx_next;
1000 }
1001 } while (FD_Done(status) && boguscount--);
1002 lp->rx_ptr = rx_block;
1003 }
1004
1005 /*
1006 * Hand a packet to the card for transmission
1007 * If we get here, we MUST have already checked
1008 * to make sure there is room in the transmit
1009 * buffer region.
1010 */
1011
1012 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
1013 unsigned short len)
1014 {
1015 struct net_local *lp = netdev_priv(dev);
1016 unsigned short ioaddr = dev->base_addr;
1017
1018 if (LOCKUP16 || lp->width) {
1019 /* Stop the CU so that there is no chance that it
1020 jumps off to a bogus address while we are writing the
1021 pointer to the next transmit packet in 8-bit mode --
1022 this eliminates the "CU wedged" errors in 8-bit mode.
1023 (Zoltan Szilagyi 10-12-96) */
1024 scb_command(dev, SCB_CUsuspend);
1025 outw(0xFFFF, ioaddr+SIGNAL_CA);
1026 }
1027
1028 outw(lp->tx_head, ioaddr + WRITE_PTR);
1029
1030 outw(0x0000, ioaddr + DATAPORT);
1031 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1032 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1033 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1034
1035 outw(0x0000, ioaddr + DATAPORT);
1036 outw(0x0000, ioaddr + DATAPORT);
1037 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1038
1039 outw(0x8000|len, ioaddr + DATAPORT);
1040 outw(-1, ioaddr + DATAPORT);
1041 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1042 outw(0, ioaddr + DATAPORT);
1043
1044 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1045
1046 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1047 outw(lp->tx_head, ioaddr + DATAPORT);
1048
1049 dev->trans_start = jiffies;
1050 lp->tx_tail = lp->tx_head;
1051 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1052 lp->tx_head = TX_BUF_START;
1053 else
1054 lp->tx_head += TX_BUF_SIZE;
1055 if (lp->tx_head != lp->tx_reap)
1056 netif_wake_queue(dev);
1057
1058 if (LOCKUP16 || lp->width) {
1059 /* Restart the CU so that the packet can actually
1060 be transmitted. (Zoltan Szilagyi 10-12-96) */
1061 scb_command(dev, SCB_CUresume);
1062 outw(0xFFFF, ioaddr+SIGNAL_CA);
1063 }
1064
1065 lp->stats.tx_packets++;
1066 lp->last_tx = jiffies;
1067 }
1068
1069 /*
1070 * Sanity check the suspected EtherExpress card
1071 * Read hardware address, reset card, size memory and initialize buffer
1072 * memory pointers. These are held in dev->priv, in case someone has more
1073 * than one card in a machine.
1074 */
1075
1076 static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1077 {
1078 unsigned short hw_addr[3];
1079 unsigned char buswidth;
1080 unsigned int memory_size;
1081 int i;
1082 unsigned short xsum = 0;
1083 struct net_local *lp = netdev_priv(dev);
1084
1085 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1086
1087 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1088 outb(0, ioaddr+EEPROM_Ctrl);
1089 udelay(500);
1090 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1091
1092 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1093 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1094 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1095
1096 /* Standard Address or Compaq LTE Address */
1097 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
1098 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1099 {
1100 printk(" rejected: invalid address %04x%04x%04x\n",
1101 hw_addr[2],hw_addr[1],hw_addr[0]);
1102 return -ENODEV;
1103 }
1104
1105 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1106 * though.
1107 */
1108 for (i = 0; i < 64; i++)
1109 xsum += eexp_hw_readeeprom(ioaddr, i);
1110 if (xsum != 0xbaba)
1111 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1112
1113 dev->base_addr = ioaddr;
1114 for ( i=0 ; i<6 ; i++ )
1115 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1116
1117 {
1118 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1119 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1120
1121 /* Use the IRQ from EEPROM if none was given */
1122 if (!dev->irq)
1123 dev->irq = irqmap[setupval>>13];
1124
1125 if (dev->if_port == 0xff) {
1126 dev->if_port = !(setupval & 0x1000) ? AUI :
1127 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1128 }
1129
1130 buswidth = !((setupval & 0x400) >> 10);
1131 }
1132
1133 memset(lp, 0, sizeof(struct net_local));
1134 spin_lock_init(&lp->lock);
1135
1136 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1137 eexp_ifmap[dev->if_port], buswidth?8:16);
1138
1139 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1140 return -EBUSY;
1141
1142 eexp_hw_set_interface(dev);
1143
1144 release_region(dev->base_addr + 0x300e, 1);
1145
1146 /* Find out how much RAM we have on the card */
1147 outw(0, dev->base_addr + WRITE_PTR);
1148 for (i = 0; i < 32768; i++)
1149 outw(0, dev->base_addr + DATAPORT);
1150
1151 for (memory_size = 0; memory_size < 64; memory_size++)
1152 {
1153 outw(memory_size<<10, dev->base_addr + READ_PTR);
1154 if (inw(dev->base_addr+DATAPORT))
1155 break;
1156 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1157 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1158 outw(memory_size<<10, dev->base_addr + READ_PTR);
1159 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1160 break;
1161 }
1162
1163 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1164 * of RAM to play with.
1165 */
1166 lp->num_tx_bufs = 4;
1167 lp->rx_buf_end = 0x3ff6;
1168 switch (memory_size)
1169 {
1170 case 64:
1171 lp->rx_buf_end += 0x4000;
1172 case 48:
1173 lp->num_tx_bufs += 4;
1174 lp->rx_buf_end += 0x4000;
1175 case 32:
1176 lp->rx_buf_end += 0x4000;
1177 case 16:
1178 printk(", %dk RAM)\n", memory_size);
1179 break;
1180 default:
1181 printk(") bad memory size (%dk).\n", memory_size);
1182 return -ENODEV;
1183 break;
1184 }
1185
1186 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1187 lp->width = buswidth;
1188
1189 dev->open = eexp_open;
1190 dev->stop = eexp_close;
1191 dev->hard_start_xmit = eexp_xmit;
1192 dev->get_stats = eexp_stats;
1193 dev->set_multicast_list = &eexp_set_multicast;
1194 dev->tx_timeout = eexp_timeout;
1195 dev->watchdog_timeo = 2*HZ;
1196
1197 return register_netdev(dev);
1198 }
1199
1200 /*
1201 * Read a word from the EtherExpress on-board serial EEPROM.
1202 * The EEPROM contains 64 words of 16 bits.
1203 */
1204 static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1205 unsigned char location)
1206 {
1207 unsigned short cmd = 0x180|(location&0x7f);
1208 unsigned short rval = 0,wval = EC_CS|i586_RST;
1209 int i;
1210
1211 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1212 for (i=0x100 ; i ; i>>=1 )
1213 {
1214 if (cmd&i)
1215 wval |= EC_Wr;
1216 else
1217 wval &= ~EC_Wr;
1218
1219 outb(wval,ioaddr+EEPROM_Ctrl);
1220 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1221 eeprom_delay();
1222 outb(wval,ioaddr+EEPROM_Ctrl);
1223 eeprom_delay();
1224 }
1225 wval &= ~EC_Wr;
1226 outb(wval,ioaddr+EEPROM_Ctrl);
1227 for (i=0x8000 ; i ; i>>=1 )
1228 {
1229 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1230 eeprom_delay();
1231 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1232 rval |= i;
1233 outb(wval,ioaddr+EEPROM_Ctrl);
1234 eeprom_delay();
1235 }
1236 wval &= ~EC_CS;
1237 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1238 eeprom_delay();
1239 outb(wval,ioaddr+EEPROM_Ctrl);
1240 eeprom_delay();
1241 return rval;
1242 }
1243
1244 /*
1245 * Reap tx buffers and return last transmit status.
1246 * if ==0 then either:
1247 * a) we're not transmitting anything, so why are we here?
1248 * b) we've died.
1249 * otherwise, Stat_Busy(return) means we've still got some packets
1250 * to transmit, Stat_Done(return) means our buffers should be empty
1251 * again
1252 */
1253
1254 static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1255 {
1256 struct net_local *lp = netdev_priv(dev);
1257 unsigned short tx_block = lp->tx_reap;
1258 unsigned short status;
1259
1260 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1261 return 0x0000;
1262
1263 do
1264 {
1265 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1266 status = inw(dev->base_addr + SHADOW(tx_block));
1267 if (!Stat_Done(status))
1268 {
1269 lp->tx_link = tx_block;
1270 return status;
1271 }
1272 else
1273 {
1274 lp->last_tx_restart = 0;
1275 lp->stats.collisions += Stat_NoColl(status);
1276 if (!Stat_OK(status))
1277 {
1278 char *whatsup = NULL;
1279 lp->stats.tx_errors++;
1280 if (Stat_Abort(status))
1281 lp->stats.tx_aborted_errors++;
1282 if (Stat_TNoCar(status)) {
1283 whatsup = "aborted, no carrier";
1284 lp->stats.tx_carrier_errors++;
1285 }
1286 if (Stat_TNoCTS(status)) {
1287 whatsup = "aborted, lost CTS";
1288 lp->stats.tx_carrier_errors++;
1289 }
1290 if (Stat_TNoDMA(status)) {
1291 whatsup = "FIFO underran";
1292 lp->stats.tx_fifo_errors++;
1293 }
1294 if (Stat_TXColl(status)) {
1295 whatsup = "aborted, too many collisions";
1296 lp->stats.tx_aborted_errors++;
1297 }
1298 if (whatsup)
1299 printk(KERN_INFO "%s: transmit %s\n",
1300 dev->name, whatsup);
1301 }
1302 else
1303 lp->stats.tx_packets++;
1304 }
1305 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1306 lp->tx_reap = tx_block = TX_BUF_START;
1307 else
1308 lp->tx_reap = tx_block += TX_BUF_SIZE;
1309 netif_wake_queue(dev);
1310 }
1311 while (lp->tx_reap != lp->tx_head);
1312
1313 lp->tx_link = lp->tx_tail + 0x08;
1314
1315 return status;
1316 }
1317
1318 /*
1319 * This should never happen. It is called when some higher routine detects
1320 * that the CU has stopped, to try to restart it from the last packet we knew
1321 * we were working on, or the idle loop if we had finished for the time.
1322 */
1323
1324 static void eexp_hw_txrestart(struct net_device *dev)
1325 {
1326 struct net_local *lp = netdev_priv(dev);
1327 unsigned short ioaddr = dev->base_addr;
1328
1329 lp->last_tx_restart = lp->tx_link;
1330 scb_wrcbl(dev, lp->tx_link);
1331 scb_command(dev, SCB_CUstart);
1332 outb(0,ioaddr+SIGNAL_CA);
1333
1334 {
1335 unsigned short boguscount=50,failcount=5;
1336 while (!scb_status(dev))
1337 {
1338 if (!--boguscount)
1339 {
1340 if (--failcount)
1341 {
1342 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1343 scb_wrcbl(dev, lp->tx_link);
1344 scb_command(dev, SCB_CUstart);
1345 outb(0,ioaddr+SIGNAL_CA);
1346 boguscount = 100;
1347 }
1348 else
1349 {
1350 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1351 eexp_hw_init586(dev);
1352 netif_wake_queue(dev);
1353 return;
1354 }
1355 }
1356 }
1357 }
1358 }
1359
1360 /*
1361 * Writes down the list of transmit buffers into card memory. Each
1362 * entry consists of an 82586 transmit command, followed by a jump
1363 * pointing to itself. When we want to transmit a packet, we write
1364 * the data into the appropriate transmit buffer and then modify the
1365 * preceding jump to point at the new transmit command. This means that
1366 * the 586 command unit is continuously active.
1367 */
1368
1369 static void eexp_hw_txinit(struct net_device *dev)
1370 {
1371 struct net_local *lp = netdev_priv(dev);
1372 unsigned short tx_block = TX_BUF_START;
1373 unsigned short curtbuf;
1374 unsigned short ioaddr = dev->base_addr;
1375
1376 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1377 {
1378 outw(tx_block, ioaddr + WRITE_PTR);
1379
1380 outw(0x0000, ioaddr + DATAPORT);
1381 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1382 outw(tx_block+0x08, ioaddr + DATAPORT);
1383 outw(tx_block+0x0e, ioaddr + DATAPORT);
1384
1385 outw(0x0000, ioaddr + DATAPORT);
1386 outw(0x0000, ioaddr + DATAPORT);
1387 outw(tx_block+0x08, ioaddr + DATAPORT);
1388
1389 outw(0x8000, ioaddr + DATAPORT);
1390 outw(-1, ioaddr + DATAPORT);
1391 outw(tx_block+0x16, ioaddr + DATAPORT);
1392 outw(0x0000, ioaddr + DATAPORT);
1393
1394 tx_block += TX_BUF_SIZE;
1395 }
1396 lp->tx_head = TX_BUF_START;
1397 lp->tx_reap = TX_BUF_START;
1398 lp->tx_tail = tx_block - TX_BUF_SIZE;
1399 lp->tx_link = lp->tx_tail + 0x08;
1400 lp->rx_buf_start = tx_block;
1401
1402 }
1403
1404 /*
1405 * Write the circular list of receive buffer descriptors to card memory.
1406 * The end of the list isn't marked, which means that the 82586 receive
1407 * unit will loop until buffers become available (this avoids it giving us
1408 * "out of resources" messages).
1409 */
1410
1411 static void eexp_hw_rxinit(struct net_device *dev)
1412 {
1413 struct net_local *lp = netdev_priv(dev);
1414 unsigned short rx_block = lp->rx_buf_start;
1415 unsigned short ioaddr = dev->base_addr;
1416
1417 lp->num_rx_bufs = 0;
1418 lp->rx_first = lp->rx_ptr = rx_block;
1419 do
1420 {
1421 lp->num_rx_bufs++;
1422
1423 outw(rx_block, ioaddr + WRITE_PTR);
1424
1425 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1426 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1427 outw(0xffff, ioaddr+DATAPORT);
1428
1429 outw(0x0000, ioaddr+DATAPORT);
1430 outw(0xdead, ioaddr+DATAPORT);
1431 outw(0xdead, ioaddr+DATAPORT);
1432 outw(0xdead, ioaddr+DATAPORT);
1433 outw(0xdead, ioaddr+DATAPORT);
1434 outw(0xdead, ioaddr+DATAPORT);
1435 outw(0xdead, ioaddr+DATAPORT);
1436
1437 outw(0x0000, ioaddr+DATAPORT);
1438 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1439 outw(rx_block + 0x20, ioaddr+DATAPORT);
1440 outw(0, ioaddr+DATAPORT);
1441 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1442
1443 lp->rx_last = rx_block;
1444 rx_block += RX_BUF_SIZE;
1445 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1446
1447
1448 /* Make first Rx frame descriptor point to first Rx buffer
1449 descriptor */
1450 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1451 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1452
1453 /* Close Rx frame descriptor ring */
1454 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1455 outw(lp->rx_first, ioaddr+DATAPORT);
1456
1457 /* Close Rx buffer descriptor ring */
1458 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1459 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1460
1461 }
1462
1463 /*
1464 * Un-reset the 586, and start the configuration sequence. We don't wait for
1465 * this to finish, but allow the interrupt handler to start the CU and RU for
1466 * us. We can't start the receive/transmission system up before we know that
1467 * the hardware is configured correctly.
1468 */
1469
1470 static void eexp_hw_init586(struct net_device *dev)
1471 {
1472 struct net_local *lp = netdev_priv(dev);
1473 unsigned short ioaddr = dev->base_addr;
1474 int i;
1475
1476 #if NET_DEBUG > 6
1477 printk("%s: eexp_hw_init586()\n", dev->name);
1478 #endif
1479
1480 lp->started = 0;
1481
1482 set_loopback(dev);
1483
1484 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1485
1486 /* Download the startup code */
1487 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1488 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1489 outw(0x0000, ioaddr + 0x8008);
1490 outw(0x0000, ioaddr + 0x800a);
1491 outw(0x0000, ioaddr + 0x800c);
1492 outw(0x0000, ioaddr + 0x800e);
1493
1494 for (i = 0; i < (sizeof(start_code)); i+=32) {
1495 int j;
1496 outw(i, ioaddr + SM_PTR);
1497 for (j = 0; j < 16; j+=2)
1498 outw(start_code[(i+j)/2],
1499 ioaddr+0x4000+j);
1500 for (j = 0; j < 16; j+=2)
1501 outw(start_code[(i+j+16)/2],
1502 ioaddr+0x8000+j);
1503 }
1504
1505 /* Do we want promiscuous mode or multicast? */
1506 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1507 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1508 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1509 ioaddr+SHADOW(CONF_PROMISC));
1510 lp->was_promisc = dev->flags & IFF_PROMISC;
1511 #if 0
1512 eexp_setup_filter(dev);
1513 #endif
1514
1515 /* Write our hardware address */
1516 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1517 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
1518 outw(((unsigned short *)dev->dev_addr)[1],
1519 ioaddr+SHADOW(CONF_HWADDR+2));
1520 outw(((unsigned short *)dev->dev_addr)[2],
1521 ioaddr+SHADOW(CONF_HWADDR+4));
1522
1523 eexp_hw_txinit(dev);
1524 eexp_hw_rxinit(dev);
1525
1526 outb(0,ioaddr+EEPROM_Ctrl);
1527 mdelay(5);
1528
1529 scb_command(dev, 0xf000);
1530 outb(0,ioaddr+SIGNAL_CA);
1531
1532 outw(0, ioaddr+SM_PTR);
1533
1534 {
1535 unsigned short rboguscount=50,rfailcount=5;
1536 while (inw(ioaddr+0x4000))
1537 {
1538 if (!--rboguscount)
1539 {
1540 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1541 dev->name);
1542 scb_command(dev, 0);
1543 outb(0,ioaddr+SIGNAL_CA);
1544 rboguscount = 100;
1545 if (!--rfailcount)
1546 {
1547 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1548 dev->name);
1549 return;
1550 }
1551 }
1552 }
1553 }
1554
1555 scb_wrcbl(dev, CONF_LINK);
1556 scb_command(dev, 0xf000|SCB_CUstart);
1557 outb(0,ioaddr+SIGNAL_CA);
1558
1559 {
1560 unsigned short iboguscount=50,ifailcount=5;
1561 while (!scb_status(dev))
1562 {
1563 if (!--iboguscount)
1564 {
1565 if (--ifailcount)
1566 {
1567 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1568 dev->name, scb_status(dev), scb_rdcmd(dev));
1569 scb_wrcbl(dev, CONF_LINK);
1570 scb_command(dev, 0xf000|SCB_CUstart);
1571 outb(0,ioaddr+SIGNAL_CA);
1572 iboguscount = 100;
1573 }
1574 else
1575 {
1576 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1577 return;
1578 }
1579 }
1580 }
1581 }
1582
1583 clear_loopback(dev);
1584 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1585
1586 lp->init_time = jiffies;
1587 #if NET_DEBUG > 6
1588 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1589 #endif
1590 return;
1591 }
1592
1593 static void eexp_setup_filter(struct net_device *dev)
1594 {
1595 struct dev_mc_list *dmi = dev->mc_list;
1596 unsigned short ioaddr = dev->base_addr;
1597 int count = dev->mc_count;
1598 int i;
1599 if (count > 8) {
1600 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1601 dev->name, count);
1602 count = 8;
1603 }
1604
1605 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1606 outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1607 for (i = 0; i < count; i++) {
1608 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1609 if (!dmi) {
1610 printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1611 break;
1612 }
1613 if (dmi->dmi_addrlen != ETH_ALEN) {
1614 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1615 continue;
1616 }
1617 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1618 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1619 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1620 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1621 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1622 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1623 }
1624 }
1625
1626 /*
1627 * Set or clear the multicast filter for this adaptor.
1628 */
1629 static void
1630 eexp_set_multicast(struct net_device *dev)
1631 {
1632 unsigned short ioaddr = dev->base_addr;
1633 struct net_local *lp = netdev_priv(dev);
1634 int kick = 0, i;
1635 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1636 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1637 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1638 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1639 ioaddr+SHADOW(CONF_PROMISC));
1640 lp->was_promisc = dev->flags & IFF_PROMISC;
1641 kick = 1;
1642 }
1643 if (!(dev->flags & IFF_PROMISC)) {
1644 eexp_setup_filter(dev);
1645 if (lp->old_mc_count != dev->mc_count) {
1646 kick = 1;
1647 lp->old_mc_count = dev->mc_count;
1648 }
1649 }
1650 if (kick) {
1651 unsigned long oj;
1652 scb_command(dev, SCB_CUsuspend);
1653 outb(0, ioaddr+SIGNAL_CA);
1654 outb(0, ioaddr+SIGNAL_CA);
1655 #if 0
1656 printk("%s: waiting for CU to go suspended\n", dev->name);
1657 #endif
1658 oj = jiffies;
1659 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1660 ((jiffies-oj) < 2000));
1661 if (SCB_CUstat(scb_status(dev)) == 2)
1662 printk("%s: warning, CU didn't stop\n", dev->name);
1663 lp->started &= ~(STARTED_CU);
1664 scb_wrcbl(dev, CONF_LINK);
1665 scb_command(dev, SCB_CUstart);
1666 outb(0, ioaddr+SIGNAL_CA);
1667 }
1668 }
1669
1670
1671 /*
1672 * MODULE stuff
1673 */
1674
1675 #ifdef MODULE
1676
1677 #define EEXP_MAX_CARDS 4 /* max number of cards to support */
1678
1679 static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1680 static int irq[EEXP_MAX_CARDS];
1681 static int io[EEXP_MAX_CARDS];
1682
1683 module_param_array(io, int, NULL, 0);
1684 module_param_array(irq, int, NULL, 0);
1685 MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1686 MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1687 MODULE_LICENSE("GPL");
1688
1689
1690 /* Ideally the user would give us io=, irq= for every card. If any parameters
1691 * are specified, we verify and then use them. If no parameters are given, we
1692 * autoprobe for one card only.
1693 */
1694 int __init init_module(void)
1695 {
1696 struct net_device *dev;
1697 int this_dev, found = 0;
1698
1699 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1700 dev = alloc_etherdev(sizeof(struct net_local));
1701 dev->irq = irq[this_dev];
1702 dev->base_addr = io[this_dev];
1703 if (io[this_dev] == 0) {
1704 if (this_dev)
1705 break;
1706 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1707 }
1708 if (do_express_probe(dev) == 0) {
1709 dev_eexp[this_dev] = dev;
1710 found++;
1711 continue;
1712 }
1713 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1714 free_netdev(dev);
1715 break;
1716 }
1717 if (found)
1718 return 0;
1719 return -ENXIO;
1720 }
1721
1722 void cleanup_module(void)
1723 {
1724 int this_dev;
1725
1726 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1727 struct net_device *dev = dev_eexp[this_dev];
1728 if (dev) {
1729 unregister_netdev(dev);
1730 free_netdev(dev);
1731 }
1732 }
1733 }
1734 #endif
1735
1736 /*
1737 * Local Variables:
1738 * c-file-style: "linux"
1739 * tab-width: 8
1740 * End:
1741 */
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