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[MTD] Remove gratuitous inclusion of ARM-only header from physmap.c
[linux-2.6/mini2440.git] / drivers / net / eexpress.c
blob82bd356e4f3abf8d2ecf7ff909f8ce4b7bda149f
1 /* Intel EtherExpress 16 device driver for Linux
2 *
3 * Written by John Sullivan, 1995
4 * based on original code by Donald Becker, with changes by
5 * Alan Cox and Pauline Middelink.
6 *
7 * Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
8 *
9 * Many modifications, and currently maintained, by
10 * Philip Blundell <philb@gnu.org>
11 * Added the Compaq LTE Alan Cox <alan@redhat.com>
12 * Added MCA support Adam Fritzler <mid@auk.cx>
13 *
14 * Note - this driver is experimental still - it has problems on faster
15 * machines. Someone needs to sit down and go through it line by line with
16 * a databook...
17 */
18
19 /* The EtherExpress 16 is a fairly simple card, based on a shared-memory
20 * design using the i82586 Ethernet coprocessor. It bears no relationship,
21 * as far as I know, to the similarly-named "EtherExpress Pro" range.
22 *
23 * Historically, Linux support for these cards has been very bad. However,
24 * things seem to be getting better slowly.
25 */
26
27 /* If your card is confused about what sort of interface it has (eg it
28 * persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
29 * or 'SOFTSET /LISA' from DOS seems to help.
30 */
31
32 /* Here's the scoop on memory mapping.
33 *
34 * There are three ways to access EtherExpress card memory: either using the
35 * shared-memory mapping, or using PIO through the dataport, or using PIO
36 * through the "shadow memory" ports.
37 *
38 * The shadow memory system works by having the card map some of its memory
39 * as follows:
40 *
41 * (the low five bits of the SMPTR are ignored)
42 *
43 * base+0x4000..400f memory at SMPTR+0..15
44 * base+0x8000..800f memory at SMPTR+16..31
45 * base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently)
46 * base+0xc008..c00f memory at 0x0008..0x000f
47 *
48 * This last set (the one at c008) is particularly handy because the SCB
49 * lives at 0x0008. So that set of ports gives us easy random access to data
50 * in the SCB without having to mess around setting up pointers and the like.
51 * We always use this method to access the SCB (via the scb_xx() functions).
52 *
53 * Dataport access works by aiming the appropriate (read or write) pointer
54 * at the first address you're interested in, and then reading or writing from
55 * the dataport. The pointers auto-increment after each transfer. We use
56 * this for data transfer.
57 *
58 * We don't use the shared-memory system because it allegedly doesn't work on
59 * all cards, and because it's a bit more prone to go wrong (it's one more
60 * thing to configure...).
61 */
62
63 /* Known bugs:
64 *
65 * - The card seems to want to give us two interrupts every time something
66 * happens, where just one would be better.
67 */
68
69 /*
70 *
71 * Note by Zoltan Szilagyi 10-12-96:
72 *
73 * I've succeeded in eliminating the "CU wedged" messages, and hence the
74 * lockups, which were only occurring with cards running in 8-bit mode ("force
75 * 8-bit operation" in Intel's SoftSet utility). This version of the driver
76 * sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
77 * CU before submitting a packet for transmission, and then restarts it as soon
78 * as the process of handing the packet is complete. This is definitely an
79 * unnecessary slowdown if the card is running in 16-bit mode; therefore one
80 * should detect 16-bit vs 8-bit mode from the EEPROM settings and act
81 * accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
82 * ftp's, which is significantly better than I get in DOS, so the overhead of
83 * stopping and restarting the CU with each transmit is not prohibitive in
84 * practice.
85 *
86 * Update by David Woodhouse 11/5/99:
87 *
88 * I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
89 * I assume that this is because 16-bit accesses are actually handled as two
90 * 8-bit accesses.
91 */
92
93 #ifdef __alpha__
94 #define LOCKUP16 1
95 #endif
96 #ifndef LOCKUP16
97 #define LOCKUP16 0
98 #endif
99
100 #include <linux/config.h>
101 #include <linux/module.h>
102 #include <linux/kernel.h>
103 #include <linux/types.h>
104 #include <linux/fcntl.h>
105 #include <linux/interrupt.h>
106 #include <linux/ioport.h>
107 #include <linux/string.h>
108 #include <linux/in.h>
109 #include <linux/delay.h>
110 #include <linux/errno.h>
111 #include <linux/init.h>
112 #include <linux/netdevice.h>
113 #include <linux/etherdevice.h>
114 #include <linux/skbuff.h>
115 #include <linux/slab.h>
116 #include <linux/mca-legacy.h>
117 #include <linux/spinlock.h>
118 #include <linux/bitops.h>
119
120 #include <asm/system.h>
121 #include <asm/io.h>
122 #include <asm/irq.h>
123
124 #ifndef NET_DEBUG
125 #define NET_DEBUG 4
126 #endif
127
128 #include "eexpress.h"
129
130 #define EEXP_IO_EXTENT 16
131
132 /*
133 * Private data declarations
134 */
135
136 struct net_local
137 {
138 struct net_device_stats stats;
139 unsigned long last_tx; /* jiffies when last transmit started */
140 unsigned long init_time; /* jiffies when eexp_hw_init586 called */
141 unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
142 unsigned short rx_last; /* last rx buf */
143 unsigned short rx_ptr; /* first rx buf to look at */
144 unsigned short tx_head; /* next free tx buf */
145 unsigned short tx_reap; /* first in-use tx buf */
146 unsigned short tx_tail; /* previous tx buf to tx_head */
147 unsigned short tx_link; /* last known-executing tx buf */
148 unsigned short last_tx_restart; /* set to tx_link when we
149 restart the CU */
150 unsigned char started;
151 unsigned short rx_buf_start;
152 unsigned short rx_buf_end;
153 unsigned short num_tx_bufs;
154 unsigned short num_rx_bufs;
155 unsigned char width; /* 0 for 16bit, 1 for 8bit */
156 unsigned char was_promisc;
157 unsigned char old_mc_count;
158 spinlock_t lock;
159 };
160
161 /* This is the code and data that is downloaded to the EtherExpress card's
162 * memory at boot time.
163 */
164
165 static unsigned short start_code[] = {
166 /* 0x0000 */
167 0x0001, /* ISCP: busy - cleared after reset */
168 0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */
169
170 0x0000,0x0000, /* SCB: status, commands */
171 0x0000,0x0000, /* links to first command block,
172 first receive descriptor */
173 0x0000,0x0000, /* CRC error, alignment error counts */
174 0x0000,0x0000, /* out of resources, overrun error counts */
175
176 0x0000,0x0000, /* pad */
177 0x0000,0x0000,
178
179 /* 0x20 -- start of 82586 CU program */
180 #define CONF_LINK 0x20
181 0x0000,Cmd_Config,
182 0x0032, /* link to next command */
183 0x080c, /* 12 bytes follow : fifo threshold=8 */
184 0x2e40, /* don't rx bad frames
185 * SRDY/ARDY => ext. sync. : preamble len=8
186 * take addresses from data buffers
187 * 6 bytes/address
188 */
189 0x6000, /* default backoff method & priority
190 * interframe spacing = 0x60 */
191 0xf200, /* slot time=0x200
192 * max collision retry = 0xf */
193 #define CONF_PROMISC 0x2e
194 0x0000, /* no HDLC : normal CRC : enable broadcast
195 * disable promiscuous/multicast modes */
196 0x003c, /* minimum frame length = 60 octets) */
197
198 0x0000,Cmd_SetAddr,
199 0x003e, /* link to next command */
200 #define CONF_HWADDR 0x38
201 0x0000,0x0000,0x0000, /* hardware address placed here */
202
203 0x0000,Cmd_MCast,
204 0x0076, /* link to next command */
205 #define CONF_NR_MULTICAST 0x44
206 0x0000, /* number of multicast addresses */
207 #define CONF_MULTICAST 0x46
208 0x0000, 0x0000, 0x0000, /* some addresses */
209 0x0000, 0x0000, 0x0000,
210 0x0000, 0x0000, 0x0000,
211 0x0000, 0x0000, 0x0000,
212 0x0000, 0x0000, 0x0000,
213 0x0000, 0x0000, 0x0000,
214 0x0000, 0x0000, 0x0000,
215 0x0000, 0x0000, 0x0000,
216
217 #define CONF_DIAG_RESULT 0x76
218 0x0000, Cmd_Diag,
219 0x007c, /* link to next command */
220
221 0x0000,Cmd_TDR|Cmd_INT,
222 0x0084,
223 #define CONF_TDR_RESULT 0x82
224 0x0000,
225
226 0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
227 0x0084 /* dummy link */
228 };
229
230 /* maps irq number to EtherExpress magic value */
231 static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
232
233 #ifdef CONFIG_MCA_LEGACY
234 /* mapping of the first four bits of the second POS register */
235 static unsigned short mca_iomap[] = {
236 0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
237 0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
238 };
239 /* bits 5-7 of the second POS register */
240 static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
241 #endif
242
243 /*
244 * Prototypes for Linux interface
245 */
246
247 static int eexp_open(struct net_device *dev);
248 static int eexp_close(struct net_device *dev);
249 static void eexp_timeout(struct net_device *dev);
250 static struct net_device_stats *eexp_stats(struct net_device *dev);
251 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
252
253 static irqreturn_t eexp_irq(int irq, void *dev_addr, struct pt_regs *regs);
254 static void eexp_set_multicast(struct net_device *dev);
255
256 /*
257 * Prototypes for hardware access functions
258 */
259
260 static void eexp_hw_rx_pio(struct net_device *dev);
261 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
262 unsigned short len);
263 static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
264 static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
265 unsigned char location);
266
267 static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
268 static void eexp_hw_txrestart(struct net_device *dev);
269
270 static void eexp_hw_txinit (struct net_device *dev);
271 static void eexp_hw_rxinit (struct net_device *dev);
272
273 static void eexp_hw_init586 (struct net_device *dev);
274 static void eexp_setup_filter (struct net_device *dev);
275
276 static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
277 enum eexp_iftype {AUI=0, BNC=1, TPE=2};
278
279 #define STARTED_RU 2
280 #define STARTED_CU 1
281
282 /*
283 * Primitive hardware access functions.
284 */
285
286 static inline unsigned short scb_status(struct net_device *dev)
287 {
288 return inw(dev->base_addr + 0xc008);
289 }
290
291 static inline unsigned short scb_rdcmd(struct net_device *dev)
292 {
293 return inw(dev->base_addr + 0xc00a);
294 }
295
296 static inline void scb_command(struct net_device *dev, unsigned short cmd)
297 {
298 outw(cmd, dev->base_addr + 0xc00a);
299 }
300
301 static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
302 {
303 outw(val, dev->base_addr + 0xc00c);
304 }
305
306 static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
307 {
308 outw(val, dev->base_addr + 0xc00e);
309 }
310
311 static inline void set_loopback(struct net_device *dev)
312 {
313 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
314 }
315
316 static inline void clear_loopback(struct net_device *dev)
317 {
318 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
319 }
320
321 static inline unsigned short int SHADOW(short int addr)
322 {
323 addr &= 0x1f;
324 if (addr > 0xf) addr += 0x3ff0;
325 return addr + 0x4000;
326 }
327
328 /*
329 * Linux interface
330 */
331
332 /*
333 * checks for presence of EtherExpress card
334 */
335
336 static int __init do_express_probe(struct net_device *dev)
337 {
338 unsigned short *port;
339 static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
340 unsigned short ioaddr = dev->base_addr;
341 int dev_irq = dev->irq;
342 int err;
343
344 SET_MODULE_OWNER(dev);
345
346 dev->if_port = 0xff; /* not set */
347
348 #ifdef CONFIG_MCA_LEGACY
349 if (MCA_bus) {
350 int slot = 0;
351
352 /*
353 * Only find one card at a time. Subsequent calls
354 * will find others, however, proper multicard MCA
355 * probing and setup can't be done with the
356 * old-style Space.c init routines. -- ASF
357 */
358 while (slot != MCA_NOTFOUND) {
359 int pos0, pos1;
360
361 slot = mca_find_unused_adapter(0x628B, slot);
362 if (slot == MCA_NOTFOUND)
363 break;
364
365 pos0 = mca_read_stored_pos(slot, 2);
366 pos1 = mca_read_stored_pos(slot, 3);
367 ioaddr = mca_iomap[pos1&0xf];
368
369 dev->irq = mca_irqmap[(pos1>>4)&0x7];
370
371 /*
372 * XXX: Transciever selection is done
373 * differently on the MCA version.
374 * How to get it to select something
375 * other than external/AUI is currently
376 * unknown. This code is just for looks. -- ASF
377 */
378 if ((pos0 & 0x7) == 0x1)
379 dev->if_port = AUI;
380 else if ((pos0 & 0x7) == 0x5) {
381 if (pos1 & 0x80)
382 dev->if_port = BNC;
383 else
384 dev->if_port = TPE;
385 }
386
387 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
388 mca_set_adapter_procfn(slot, NULL, dev);
389 mca_mark_as_used(slot);
390
391 break;
392 }
393 }
394 #endif
395 if (ioaddr&0xfe00) {
396 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
397 return -EBUSY;
398 err = eexp_hw_probe(dev,ioaddr);
399 release_region(ioaddr, EEXP_IO_EXTENT);
400 return err;
401 } else if (ioaddr)
402 return -ENXIO;
403
404 for (port=&ports[0] ; *port ; port++ )
405 {
406 unsigned short sum = 0;
407 int i;
408 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
409 continue;
410 for ( i=0 ; i<4 ; i++ )
411 {
412 unsigned short t;
413 t = inb(*port + ID_PORT);
414 sum |= (t>>4) << ((t & 0x03)<<2);
415 }
416 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
417 release_region(*port, EEXP_IO_EXTENT);
418 return 0;
419 }
420 release_region(*port, EEXP_IO_EXTENT);
421 dev->irq = dev_irq;
422 }
423 return -ENODEV;
424 }
425
426 #ifndef MODULE
427 struct net_device * __init express_probe(int unit)
428 {
429 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
430 int err;
431
432 if (!dev)
433 return ERR_PTR(-ENOMEM);
434
435 sprintf(dev->name, "eth%d", unit);
436 netdev_boot_setup_check(dev);
437
438 err = do_express_probe(dev);
439 if (!err)
440 return dev;
441 free_netdev(dev);
442 return ERR_PTR(err);
443 }
444 #endif
445
446 /*
447 * open and initialize the adapter, ready for use
448 */
449
450 static int eexp_open(struct net_device *dev)
451 {
452 int ret;
453 unsigned short ioaddr = dev->base_addr;
454 struct net_local *lp = netdev_priv(dev);
455
456 #if NET_DEBUG > 6
457 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
458 #endif
459
460 if (!dev->irq || !irqrmap[dev->irq])
461 return -ENXIO;
462
463 ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
464 if (ret) return ret;
465
466 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
467 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
468 , ioaddr);
469 goto err_out1;
470 }
471 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
472 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
473 , ioaddr+0x4000);
474 goto err_out2;
475 }
476 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
477 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
478 , ioaddr+0x8000);
479 goto err_out3;
480 }
481 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
482 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
483 , ioaddr+0xc000);
484 goto err_out4;
485 }
486
487 if (lp->width) {
488 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
489 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
490 }
491
492 eexp_hw_init586(dev);
493 netif_start_queue(dev);
494 #if NET_DEBUG > 6
495 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
496 #endif
497 return 0;
498
499 err_out4:
500 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
501 err_out3:
502 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
503 err_out2:
504 release_region(ioaddr, EEXP_IO_EXTENT);
505 err_out1:
506 free_irq(dev->irq, dev);
507 return -EBUSY;
508 }
509
510 /*
511 * close and disable the interface, leaving the 586 in reset.
512 */
513
514 static int eexp_close(struct net_device *dev)
515 {
516 unsigned short ioaddr = dev->base_addr;
517 struct net_local *lp = netdev_priv(dev);
518
519 int irq = dev->irq;
520
521 netif_stop_queue(dev);
522
523 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
524 lp->started = 0;
525 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
526 outb(0,ioaddr+SIGNAL_CA);
527 free_irq(irq,dev);
528 outb(i586_RST,ioaddr+EEPROM_Ctrl);
529 release_region(ioaddr, EEXP_IO_EXTENT);
530 release_region(ioaddr+0x4000, 16);
531 release_region(ioaddr+0x8000, 16);
532 release_region(ioaddr+0xc000, 16);
533
534 return 0;
535 }
536
537 /*
538 * Return interface stats
539 */
540
541 static struct net_device_stats *eexp_stats(struct net_device *dev)
542 {
543 struct net_local *lp = netdev_priv(dev);
544
545 return &lp->stats;
546 }
547
548 /*
549 * This gets called when a higher level thinks we are broken. Check that
550 * nothing has become jammed in the CU.
551 */
552
553 static void unstick_cu(struct net_device *dev)
554 {
555 struct net_local *lp = netdev_priv(dev);
556 unsigned short ioaddr = dev->base_addr;
557
558 if (lp->started)
559 {
560 if ((jiffies - dev->trans_start)>50)
561 {
562 if (lp->tx_link==lp->last_tx_restart)
563 {
564 unsigned short boguscount=200,rsst;
565 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
566 dev->name, scb_status(dev));
567 eexp_hw_txinit(dev);
568 lp->last_tx_restart = 0;
569 scb_wrcbl(dev, lp->tx_link);
570 scb_command(dev, SCB_CUstart);
571 outb(0,ioaddr+SIGNAL_CA);
572 while (!SCB_complete(rsst=scb_status(dev)))
573 {
574 if (!--boguscount)
575 {
576 boguscount=200;
577 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
578 dev->name,rsst);
579 scb_wrcbl(dev, lp->tx_link);
580 scb_command(dev, SCB_CUstart);
581 outb(0,ioaddr+SIGNAL_CA);
582 }
583 }
584 netif_wake_queue(dev);
585 }
586 else
587 {
588 unsigned short status = scb_status(dev);
589 if (SCB_CUdead(status))
590 {
591 unsigned short txstatus = eexp_hw_lasttxstat(dev);
592 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
593 dev->name, status, txstatus);
594 eexp_hw_txrestart(dev);
595 }
596 else
597 {
598 unsigned short txstatus = eexp_hw_lasttxstat(dev);
599 if (netif_queue_stopped(dev) && !txstatus)
600 {
601 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
602 dev->name,status,txstatus);
603 eexp_hw_init586(dev);
604 netif_wake_queue(dev);
605 }
606 else
607 {
608 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
609 }
610 }
611 }
612 }
613 }
614 else
615 {
616 if ((jiffies-lp->init_time)>10)
617 {
618 unsigned short status = scb_status(dev);
619 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
620 dev->name, status);
621 eexp_hw_init586(dev);
622 netif_wake_queue(dev);
623 }
624 }
625 }
626
627 static void eexp_timeout(struct net_device *dev)
628 {
629 struct net_local *lp = netdev_priv(dev);
630 #ifdef CONFIG_SMP
631 unsigned long flags;
632 #endif
633 int status;
634
635 disable_irq(dev->irq);
636
637 /*
638 * Best would be to use synchronize_irq(); spin_lock() here
639 * lets make it work first..
640 */
641
642 #ifdef CONFIG_SMP
643 spin_lock_irqsave(&lp->lock, flags);
644 #endif
645
646 status = scb_status(dev);
647 unstick_cu(dev);
648 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
649 (SCB_complete(status)?"lost interrupt":
650 "board on fire"));
651 lp->stats.tx_errors++;
652 lp->last_tx = jiffies;
653 if (!SCB_complete(status)) {
654 scb_command(dev, SCB_CUabort);
655 outb(0,dev->base_addr+SIGNAL_CA);
656 }
657 netif_wake_queue(dev);
658 #ifdef CONFIG_SMP
659 spin_unlock_irqrestore(&lp->lock, flags);
660 #endif
661 }
662
663 /*
664 * Called to transmit a packet, or to allow us to right ourselves
665 * if the kernel thinks we've died.
666 */
667 static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
668 {
669 struct net_local *lp = netdev_priv(dev);
670 short length = buf->len;
671 #ifdef CONFIG_SMP
672 unsigned long flags;
673 #endif
674
675 #if NET_DEBUG > 6
676 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
677 #endif
678
679 if (buf->len < ETH_ZLEN) {
680 buf = skb_padto(buf, ETH_ZLEN);
681 if (buf == NULL)
682 return 0;
683 length = ETH_ZLEN;
684 }
685
686 disable_irq(dev->irq);
687
688 /*
689 * Best would be to use synchronize_irq(); spin_lock() here
690 * lets make it work first..
691 */
692
693 #ifdef CONFIG_SMP
694 spin_lock_irqsave(&lp->lock, flags);
695 #endif
696
697 {
698 unsigned short *data = (unsigned short *)buf->data;
699
700 lp->stats.tx_bytes += length;
701
702 eexp_hw_tx_pio(dev,data,length);
703 }
704 dev_kfree_skb(buf);
705 #ifdef CONFIG_SMP
706 spin_unlock_irqrestore(&lp->lock, flags);
707 #endif
708 enable_irq(dev->irq);
709 return 0;
710 }
711
712 /*
713 * Handle an EtherExpress interrupt
714 * If we've finished initializing, start the RU and CU up.
715 * If we've already started, reap tx buffers, handle any received packets,
716 * check to make sure we've not become wedged.
717 */
718
719 /*
720 * Handle an EtherExpress interrupt
721 * If we've finished initializing, start the RU and CU up.
722 * If we've already started, reap tx buffers, handle any received packets,
723 * check to make sure we've not become wedged.
724 */
725
726 static unsigned short eexp_start_irq(struct net_device *dev,
727 unsigned short status)
728 {
729 unsigned short ack_cmd = SCB_ack(status);
730 struct net_local *lp = netdev_priv(dev);
731 unsigned short ioaddr = dev->base_addr;
732 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
733 short diag_status, tdr_status;
734 while (SCB_CUstat(status)==2)
735 status = scb_status(dev);
736 #if NET_DEBUG > 4
737 printk("%s: CU went non-active (status %04x)\n",
738 dev->name, status);
739 #endif
740
741 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
742 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
743 if (diag_status & 1<<11) {
744 printk(KERN_WARNING "%s: 82586 failed self-test\n",
745 dev->name);
746 } else if (!(diag_status & 1<<13)) {
747 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
748 }
749
750 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
751 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
752 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
753 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" : "");
754 }
755 else if (tdr_status & TDR_XCVRPROBLEM) {
756 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
757 }
758 else if (tdr_status & TDR_LINKOK) {
759 #if NET_DEBUG > 4
760 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
761 #endif
762 } else {
763 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
764 tdr_status);
765 }
766
767 lp->started |= STARTED_CU;
768 scb_wrcbl(dev, lp->tx_link);
769 /* if the RU isn't running, start it now */
770 if (!(lp->started & STARTED_RU)) {
771 ack_cmd |= SCB_RUstart;
772 scb_wrrfa(dev, lp->rx_buf_start);
773 lp->rx_ptr = lp->rx_buf_start;
774 lp->started |= STARTED_RU;
775 }
776 ack_cmd |= SCB_CUstart | 0x2000;
777 }
778
779 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
780 lp->started|=STARTED_RU;
781
782 return ack_cmd;
783 }
784
785 static void eexp_cmd_clear(struct net_device *dev)
786 {
787 unsigned long int oldtime = jiffies;
788 while (scb_rdcmd(dev) && ((jiffies-oldtime)<10));
789 if (scb_rdcmd(dev)) {
790 printk("%s: command didn't clear\n", dev->name);
791 }
792 }
793
794 static irqreturn_t eexp_irq(int irq, void *dev_info, struct pt_regs *regs)
795 {
796 struct net_device *dev = dev_info;
797 struct net_local *lp;
798 unsigned short ioaddr,status,ack_cmd;
799 unsigned short old_read_ptr, old_write_ptr;
800
801 if (dev==NULL)
802 {
803 printk(KERN_WARNING "eexpress: irq %d for unknown device\n",
804 irq);
805 return IRQ_NONE;
806 }
807
808 lp = netdev_priv(dev);
809 ioaddr = dev->base_addr;
810
811 spin_lock(&lp->lock);
812
813 old_read_ptr = inw(ioaddr+READ_PTR);
814 old_write_ptr = inw(ioaddr+WRITE_PTR);
815
816 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
817
818
819 status = scb_status(dev);
820
821 #if NET_DEBUG > 4
822 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
823 #endif
824
825 if (lp->started == (STARTED_CU | STARTED_RU)) {
826
827 do {
828 eexp_cmd_clear(dev);
829
830 ack_cmd = SCB_ack(status);
831 scb_command(dev, ack_cmd);
832 outb(0,ioaddr+SIGNAL_CA);
833
834 eexp_cmd_clear(dev);
835
836 if (SCB_complete(status)) {
837 if (!eexp_hw_lasttxstat(dev)) {
838 printk("%s: tx interrupt but no status\n", dev->name);
839 }
840 }
841
842 if (SCB_rxdframe(status))
843 eexp_hw_rx_pio(dev);
844
845 status = scb_status(dev);
846 } while (status & 0xc000);
847
848 if (SCB_RUdead(status))
849 {
850 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
851 dev->name,status);
852 #if 0
853 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
854 outw(lp->cur_rfd, ioaddr+READ_PTR);
855 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
856 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
857 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
858 outw(rbd, ioaddr+READ_PTR);
859 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
860 outw(rbd+8, ioaddr+READ_PTR);
861 printk("[%04x]\n", inw(ioaddr+DATAPORT));
862 #endif
863 lp->stats.rx_errors++;
864 #if 1
865 eexp_hw_rxinit(dev);
866 #else
867 lp->cur_rfd = lp->first_rfd;
868 #endif
869 scb_wrrfa(dev, lp->rx_buf_start);
870 scb_command(dev, SCB_RUstart);
871 outb(0,ioaddr+SIGNAL_CA);
872 }
873 } else {
874 if (status & 0x8000)
875 ack_cmd = eexp_start_irq(dev, status);
876 else
877 ack_cmd = SCB_ack(status);
878 scb_command(dev, ack_cmd);
879 outb(0,ioaddr+SIGNAL_CA);
880 }
881
882 eexp_cmd_clear(dev);
883
884 outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
885
886 #if NET_DEBUG > 6
887 printk("%s: leaving eexp_irq()\n", dev->name);
888 #endif
889 outw(old_read_ptr, ioaddr+READ_PTR);
890 outw(old_write_ptr, ioaddr+WRITE_PTR);
891
892 spin_unlock(&lp->lock);
893 return IRQ_HANDLED;
894 }
895
896 /*
897 * Hardware access functions
898 */
899
900 /*
901 * Set the cable type to use.
902 */
903
904 static void eexp_hw_set_interface(struct net_device *dev)
905 {
906 unsigned char oldval = inb(dev->base_addr + 0x300e);
907 oldval &= ~0x82;
908 switch (dev->if_port) {
909 case TPE:
910 oldval |= 0x2;
911 case BNC:
912 oldval |= 0x80;
913 break;
914 }
915 outb(oldval, dev->base_addr+0x300e);
916 mdelay(20);
917 }
918
919 /*
920 * Check all the receive buffers, and hand any received packets
921 * to the upper levels. Basic sanity check on each frame
922 * descriptor, though we don't bother trying to fix broken ones.
923 */
924
925 static void eexp_hw_rx_pio(struct net_device *dev)
926 {
927 struct net_local *lp = netdev_priv(dev);
928 unsigned short rx_block = lp->rx_ptr;
929 unsigned short boguscount = lp->num_rx_bufs;
930 unsigned short ioaddr = dev->base_addr;
931 unsigned short status;
932
933 #if NET_DEBUG > 6
934 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
935 #endif
936
937 do {
938 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
939
940 outw(rx_block, ioaddr + READ_PTR);
941 status = inw(ioaddr + DATAPORT);
942
943 if (FD_Done(status))
944 {
945 rfd_cmd = inw(ioaddr + DATAPORT);
946 rx_next = inw(ioaddr + DATAPORT);
947 pbuf = inw(ioaddr + DATAPORT);
948
949 outw(pbuf, ioaddr + READ_PTR);
950 pkt_len = inw(ioaddr + DATAPORT);
951
952 if (rfd_cmd!=0x0000)
953 {
954 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
955 dev->name, rfd_cmd);
956 continue;
957 }
958 else if (pbuf!=rx_block+0x16)
959 {
960 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
961 dev->name, rx_block+0x16, pbuf);
962 continue;
963 }
964 else if ((pkt_len & 0xc000)!=0xc000)
965 {
966 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
967 dev->name, pkt_len & 0xc000);
968 continue;
969 }
970 else if (!FD_OK(status))
971 {
972 lp->stats.rx_errors++;
973 if (FD_CRC(status))
974 lp->stats.rx_crc_errors++;
975 if (FD_Align(status))
976 lp->stats.rx_frame_errors++;
977 if (FD_Resrc(status))
978 lp->stats.rx_fifo_errors++;
979 if (FD_DMA(status))
980 lp->stats.rx_over_errors++;
981 if (FD_Short(status))
982 lp->stats.rx_length_errors++;
983 }
984 else
985 {
986 struct sk_buff *skb;
987 pkt_len &= 0x3fff;
988 skb = dev_alloc_skb(pkt_len+16);
989 if (skb == NULL)
990 {
991 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
992 lp->stats.rx_dropped++;
993 break;
994 }
995 skb->dev = dev;
996 skb_reserve(skb, 2);
997 outw(pbuf+10, ioaddr+READ_PTR);
998 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
999 skb->protocol = eth_type_trans(skb,dev);
1000 netif_rx(skb);
1001 dev->last_rx = jiffies;
1002 lp->stats.rx_packets++;
1003 lp->stats.rx_bytes += pkt_len;
1004 }
1005 outw(rx_block, ioaddr+WRITE_PTR);
1006 outw(0, ioaddr+DATAPORT);
1007 outw(0, ioaddr+DATAPORT);
1008 rx_block = rx_next;
1009 }
1010 } while (FD_Done(status) && boguscount--);
1011 lp->rx_ptr = rx_block;
1012 }
1013
1014 /*
1015 * Hand a packet to the card for transmission
1016 * If we get here, we MUST have already checked
1017 * to make sure there is room in the transmit
1018 * buffer region.
1019 */
1020
1021 static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
1022 unsigned short len)
1023 {
1024 struct net_local *lp = netdev_priv(dev);
1025 unsigned short ioaddr = dev->base_addr;
1026
1027 if (LOCKUP16 || lp->width) {
1028 /* Stop the CU so that there is no chance that it
1029 jumps off to a bogus address while we are writing the
1030 pointer to the next transmit packet in 8-bit mode --
1031 this eliminates the "CU wedged" errors in 8-bit mode.
1032 (Zoltan Szilagyi 10-12-96) */
1033 scb_command(dev, SCB_CUsuspend);
1034 outw(0xFFFF, ioaddr+SIGNAL_CA);
1035 }
1036
1037 outw(lp->tx_head, ioaddr + WRITE_PTR);
1038
1039 outw(0x0000, ioaddr + DATAPORT);
1040 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1041 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1042 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1043
1044 outw(0x0000, ioaddr + DATAPORT);
1045 outw(0x0000, ioaddr + DATAPORT);
1046 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1047
1048 outw(0x8000|len, ioaddr + DATAPORT);
1049 outw(-1, ioaddr + DATAPORT);
1050 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1051 outw(0, ioaddr + DATAPORT);
1052
1053 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1054
1055 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1056 outw(lp->tx_head, ioaddr + DATAPORT);
1057
1058 dev->trans_start = jiffies;
1059 lp->tx_tail = lp->tx_head;
1060 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1061 lp->tx_head = TX_BUF_START;
1062 else
1063 lp->tx_head += TX_BUF_SIZE;
1064 if (lp->tx_head != lp->tx_reap)
1065 netif_wake_queue(dev);
1066
1067 if (LOCKUP16 || lp->width) {
1068 /* Restart the CU so that the packet can actually
1069 be transmitted. (Zoltan Szilagyi 10-12-96) */
1070 scb_command(dev, SCB_CUresume);
1071 outw(0xFFFF, ioaddr+SIGNAL_CA);
1072 }
1073
1074 lp->stats.tx_packets++;
1075 lp->last_tx = jiffies;
1076 }
1077
1078 /*
1079 * Sanity check the suspected EtherExpress card
1080 * Read hardware address, reset card, size memory and initialize buffer
1081 * memory pointers. These are held in dev->priv, in case someone has more
1082 * than one card in a machine.
1083 */
1084
1085 static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1086 {
1087 unsigned short hw_addr[3];
1088 unsigned char buswidth;
1089 unsigned int memory_size;
1090 int i;
1091 unsigned short xsum = 0;
1092 struct net_local *lp = netdev_priv(dev);
1093
1094 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1095
1096 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1097 outb(0, ioaddr+EEPROM_Ctrl);
1098 udelay(500);
1099 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1100
1101 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1102 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1103 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1104
1105 /* Standard Address or Compaq LTE Address */
1106 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
1107 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1108 {
1109 printk(" rejected: invalid address %04x%04x%04x\n",
1110 hw_addr[2],hw_addr[1],hw_addr[0]);
1111 return -ENODEV;
1112 }
1113
1114 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1115 * though.
1116 */
1117 for (i = 0; i < 64; i++)
1118 xsum += eexp_hw_readeeprom(ioaddr, i);
1119 if (xsum != 0xbaba)
1120 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1121
1122 dev->base_addr = ioaddr;
1123 for ( i=0 ; i<6 ; i++ )
1124 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1125
1126 {
1127 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1128 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1129
1130 /* Use the IRQ from EEPROM if none was given */
1131 if (!dev->irq)
1132 dev->irq = irqmap[setupval>>13];
1133
1134 if (dev->if_port == 0xff) {
1135 dev->if_port = !(setupval & 0x1000) ? AUI :
1136 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1137 }
1138
1139 buswidth = !((setupval & 0x400) >> 10);
1140 }
1141
1142 memset(lp, 0, sizeof(struct net_local));
1143 spin_lock_init(&lp->lock);
1144
1145 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1146 eexp_ifmap[dev->if_port], buswidth?8:16);
1147
1148 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1149 return -EBUSY;
1150
1151 eexp_hw_set_interface(dev);
1152
1153 release_region(dev->base_addr + 0x300e, 1);
1154
1155 /* Find out how much RAM we have on the card */
1156 outw(0, dev->base_addr + WRITE_PTR);
1157 for (i = 0; i < 32768; i++)
1158 outw(0, dev->base_addr + DATAPORT);
1159
1160 for (memory_size = 0; memory_size < 64; memory_size++)
1161 {
1162 outw(memory_size<<10, dev->base_addr + READ_PTR);
1163 if (inw(dev->base_addr+DATAPORT))
1164 break;
1165 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1166 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1167 outw(memory_size<<10, dev->base_addr + READ_PTR);
1168 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1169 break;
1170 }
1171
1172 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1173 * of RAM to play with.
1174 */
1175 lp->num_tx_bufs = 4;
1176 lp->rx_buf_end = 0x3ff6;
1177 switch (memory_size)
1178 {
1179 case 64:
1180 lp->rx_buf_end += 0x4000;
1181 case 48:
1182 lp->num_tx_bufs += 4;
1183 lp->rx_buf_end += 0x4000;
1184 case 32:
1185 lp->rx_buf_end += 0x4000;
1186 case 16:
1187 printk(", %dk RAM)\n", memory_size);
1188 break;
1189 default:
1190 printk(") bad memory size (%dk).\n", memory_size);
1191 return -ENODEV;
1192 break;
1193 }
1194
1195 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1196 lp->width = buswidth;
1197
1198 dev->open = eexp_open;
1199 dev->stop = eexp_close;
1200 dev->hard_start_xmit = eexp_xmit;
1201 dev->get_stats = eexp_stats;
1202 dev->set_multicast_list = &eexp_set_multicast;
1203 dev->tx_timeout = eexp_timeout;
1204 dev->watchdog_timeo = 2*HZ;
1205
1206 return register_netdev(dev);
1207 }
1208
1209 /*
1210 * Read a word from the EtherExpress on-board serial EEPROM.
1211 * The EEPROM contains 64 words of 16 bits.
1212 */
1213 static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1214 unsigned char location)
1215 {
1216 unsigned short cmd = 0x180|(location&0x7f);
1217 unsigned short rval = 0,wval = EC_CS|i586_RST;
1218 int i;
1219
1220 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1221 for (i=0x100 ; i ; i>>=1 )
1222 {
1223 if (cmd&i)
1224 wval |= EC_Wr;
1225 else
1226 wval &= ~EC_Wr;
1227
1228 outb(wval,ioaddr+EEPROM_Ctrl);
1229 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1230 eeprom_delay();
1231 outb(wval,ioaddr+EEPROM_Ctrl);
1232 eeprom_delay();
1233 }
1234 wval &= ~EC_Wr;
1235 outb(wval,ioaddr+EEPROM_Ctrl);
1236 for (i=0x8000 ; i ; i>>=1 )
1237 {
1238 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1239 eeprom_delay();
1240 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1241 rval |= i;
1242 outb(wval,ioaddr+EEPROM_Ctrl);
1243 eeprom_delay();
1244 }
1245 wval &= ~EC_CS;
1246 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1247 eeprom_delay();
1248 outb(wval,ioaddr+EEPROM_Ctrl);
1249 eeprom_delay();
1250 return rval;
1251 }
1252
1253 /*
1254 * Reap tx buffers and return last transmit status.
1255 * if ==0 then either:
1256 * a) we're not transmitting anything, so why are we here?
1257 * b) we've died.
1258 * otherwise, Stat_Busy(return) means we've still got some packets
1259 * to transmit, Stat_Done(return) means our buffers should be empty
1260 * again
1261 */
1262
1263 static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1264 {
1265 struct net_local *lp = netdev_priv(dev);
1266 unsigned short tx_block = lp->tx_reap;
1267 unsigned short status;
1268
1269 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1270 return 0x0000;
1271
1272 do
1273 {
1274 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1275 status = inw(dev->base_addr + SHADOW(tx_block));
1276 if (!Stat_Done(status))
1277 {
1278 lp->tx_link = tx_block;
1279 return status;
1280 }
1281 else
1282 {
1283 lp->last_tx_restart = 0;
1284 lp->stats.collisions += Stat_NoColl(status);
1285 if (!Stat_OK(status))
1286 {
1287 char *whatsup = NULL;
1288 lp->stats.tx_errors++;
1289 if (Stat_Abort(status))
1290 lp->stats.tx_aborted_errors++;
1291 if (Stat_TNoCar(status)) {
1292 whatsup = "aborted, no carrier";
1293 lp->stats.tx_carrier_errors++;
1294 }
1295 if (Stat_TNoCTS(status)) {
1296 whatsup = "aborted, lost CTS";
1297 lp->stats.tx_carrier_errors++;
1298 }
1299 if (Stat_TNoDMA(status)) {
1300 whatsup = "FIFO underran";
1301 lp->stats.tx_fifo_errors++;
1302 }
1303 if (Stat_TXColl(status)) {
1304 whatsup = "aborted, too many collisions";
1305 lp->stats.tx_aborted_errors++;
1306 }
1307 if (whatsup)
1308 printk(KERN_INFO "%s: transmit %s\n",
1309 dev->name, whatsup);
1310 }
1311 else
1312 lp->stats.tx_packets++;
1313 }
1314 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1315 lp->tx_reap = tx_block = TX_BUF_START;
1316 else
1317 lp->tx_reap = tx_block += TX_BUF_SIZE;
1318 netif_wake_queue(dev);
1319 }
1320 while (lp->tx_reap != lp->tx_head);
1321
1322 lp->tx_link = lp->tx_tail + 0x08;
1323
1324 return status;
1325 }
1326
1327 /*
1328 * This should never happen. It is called when some higher routine detects
1329 * that the CU has stopped, to try to restart it from the last packet we knew
1330 * we were working on, or the idle loop if we had finished for the time.
1331 */
1332
1333 static void eexp_hw_txrestart(struct net_device *dev)
1334 {
1335 struct net_local *lp = netdev_priv(dev);
1336 unsigned short ioaddr = dev->base_addr;
1337
1338 lp->last_tx_restart = lp->tx_link;
1339 scb_wrcbl(dev, lp->tx_link);
1340 scb_command(dev, SCB_CUstart);
1341 outb(0,ioaddr+SIGNAL_CA);
1342
1343 {
1344 unsigned short boguscount=50,failcount=5;
1345 while (!scb_status(dev))
1346 {
1347 if (!--boguscount)
1348 {
1349 if (--failcount)
1350 {
1351 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1352 scb_wrcbl(dev, lp->tx_link);
1353 scb_command(dev, SCB_CUstart);
1354 outb(0,ioaddr+SIGNAL_CA);
1355 boguscount = 100;
1356 }
1357 else
1358 {
1359 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1360 eexp_hw_init586(dev);
1361 netif_wake_queue(dev);
1362 return;
1363 }
1364 }
1365 }
1366 }
1367 }
1368
1369 /*
1370 * Writes down the list of transmit buffers into card memory. Each
1371 * entry consists of an 82586 transmit command, followed by a jump
1372 * pointing to itself. When we want to transmit a packet, we write
1373 * the data into the appropriate transmit buffer and then modify the
1374 * preceding jump to point at the new transmit command. This means that
1375 * the 586 command unit is continuously active.
1376 */
1377
1378 static void eexp_hw_txinit(struct net_device *dev)
1379 {
1380 struct net_local *lp = netdev_priv(dev);
1381 unsigned short tx_block = TX_BUF_START;
1382 unsigned short curtbuf;
1383 unsigned short ioaddr = dev->base_addr;
1384
1385 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1386 {
1387 outw(tx_block, ioaddr + WRITE_PTR);
1388
1389 outw(0x0000, ioaddr + DATAPORT);
1390 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1391 outw(tx_block+0x08, ioaddr + DATAPORT);
1392 outw(tx_block+0x0e, ioaddr + DATAPORT);
1393
1394 outw(0x0000, ioaddr + DATAPORT);
1395 outw(0x0000, ioaddr + DATAPORT);
1396 outw(tx_block+0x08, ioaddr + DATAPORT);
1397
1398 outw(0x8000, ioaddr + DATAPORT);
1399 outw(-1, ioaddr + DATAPORT);
1400 outw(tx_block+0x16, ioaddr + DATAPORT);
1401 outw(0x0000, ioaddr + DATAPORT);
1402
1403 tx_block += TX_BUF_SIZE;
1404 }
1405 lp->tx_head = TX_BUF_START;
1406 lp->tx_reap = TX_BUF_START;
1407 lp->tx_tail = tx_block - TX_BUF_SIZE;
1408 lp->tx_link = lp->tx_tail + 0x08;
1409 lp->rx_buf_start = tx_block;
1410
1411 }
1412
1413 /*
1414 * Write the circular list of receive buffer descriptors to card memory.
1415 * The end of the list isn't marked, which means that the 82586 receive
1416 * unit will loop until buffers become available (this avoids it giving us
1417 * "out of resources" messages).
1418 */
1419
1420 static void eexp_hw_rxinit(struct net_device *dev)
1421 {
1422 struct net_local *lp = netdev_priv(dev);
1423 unsigned short rx_block = lp->rx_buf_start;
1424 unsigned short ioaddr = dev->base_addr;
1425
1426 lp->num_rx_bufs = 0;
1427 lp->rx_first = lp->rx_ptr = rx_block;
1428 do
1429 {
1430 lp->num_rx_bufs++;
1431
1432 outw(rx_block, ioaddr + WRITE_PTR);
1433
1434 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1435 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1436 outw(0xffff, ioaddr+DATAPORT);
1437
1438 outw(0x0000, ioaddr+DATAPORT);
1439 outw(0xdead, ioaddr+DATAPORT);
1440 outw(0xdead, ioaddr+DATAPORT);
1441 outw(0xdead, ioaddr+DATAPORT);
1442 outw(0xdead, ioaddr+DATAPORT);
1443 outw(0xdead, ioaddr+DATAPORT);
1444 outw(0xdead, ioaddr+DATAPORT);
1445
1446 outw(0x0000, ioaddr+DATAPORT);
1447 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1448 outw(rx_block + 0x20, ioaddr+DATAPORT);
1449 outw(0, ioaddr+DATAPORT);
1450 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1451
1452 lp->rx_last = rx_block;
1453 rx_block += RX_BUF_SIZE;
1454 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1455
1456
1457 /* Make first Rx frame descriptor point to first Rx buffer
1458 descriptor */
1459 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1460 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1461
1462 /* Close Rx frame descriptor ring */
1463 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1464 outw(lp->rx_first, ioaddr+DATAPORT);
1465
1466 /* Close Rx buffer descriptor ring */
1467 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1468 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1469
1470 }
1471
1472 /*
1473 * Un-reset the 586, and start the configuration sequence. We don't wait for
1474 * this to finish, but allow the interrupt handler to start the CU and RU for
1475 * us. We can't start the receive/transmission system up before we know that
1476 * the hardware is configured correctly.
1477 */
1478
1479 static void eexp_hw_init586(struct net_device *dev)
1480 {
1481 struct net_local *lp = netdev_priv(dev);
1482 unsigned short ioaddr = dev->base_addr;
1483 int i;
1484
1485 #if NET_DEBUG > 6
1486 printk("%s: eexp_hw_init586()\n", dev->name);
1487 #endif
1488
1489 lp->started = 0;
1490
1491 set_loopback(dev);
1492
1493 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1494
1495 /* Download the startup code */
1496 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1497 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1498 outw(0x0000, ioaddr + 0x8008);
1499 outw(0x0000, ioaddr + 0x800a);
1500 outw(0x0000, ioaddr + 0x800c);
1501 outw(0x0000, ioaddr + 0x800e);
1502
1503 for (i = 0; i < (sizeof(start_code)); i+=32) {
1504 int j;
1505 outw(i, ioaddr + SM_PTR);
1506 for (j = 0; j < 16; j+=2)
1507 outw(start_code[(i+j)/2],
1508 ioaddr+0x4000+j);
1509 for (j = 0; j < 16; j+=2)
1510 outw(start_code[(i+j+16)/2],
1511 ioaddr+0x8000+j);
1512 }
1513
1514 /* Do we want promiscuous mode or multicast? */
1515 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1516 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1517 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1518 ioaddr+SHADOW(CONF_PROMISC));
1519 lp->was_promisc = dev->flags & IFF_PROMISC;
1520 #if 0
1521 eexp_setup_filter(dev);
1522 #endif
1523
1524 /* Write our hardware address */
1525 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1526 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
1527 outw(((unsigned short *)dev->dev_addr)[1],
1528 ioaddr+SHADOW(CONF_HWADDR+2));
1529 outw(((unsigned short *)dev->dev_addr)[2],
1530 ioaddr+SHADOW(CONF_HWADDR+4));
1531
1532 eexp_hw_txinit(dev);
1533 eexp_hw_rxinit(dev);
1534
1535 outb(0,ioaddr+EEPROM_Ctrl);
1536 mdelay(5);
1537
1538 scb_command(dev, 0xf000);
1539 outb(0,ioaddr+SIGNAL_CA);
1540
1541 outw(0, ioaddr+SM_PTR);
1542
1543 {
1544 unsigned short rboguscount=50,rfailcount=5;
1545 while (inw(ioaddr+0x4000))
1546 {
1547 if (!--rboguscount)
1548 {
1549 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1550 dev->name);
1551 scb_command(dev, 0);
1552 outb(0,ioaddr+SIGNAL_CA);
1553 rboguscount = 100;
1554 if (!--rfailcount)
1555 {
1556 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1557 dev->name);
1558 return;
1559 }
1560 }
1561 }
1562 }
1563
1564 scb_wrcbl(dev, CONF_LINK);
1565 scb_command(dev, 0xf000|SCB_CUstart);
1566 outb(0,ioaddr+SIGNAL_CA);
1567
1568 {
1569 unsigned short iboguscount=50,ifailcount=5;
1570 while (!scb_status(dev))
1571 {
1572 if (!--iboguscount)
1573 {
1574 if (--ifailcount)
1575 {
1576 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1577 dev->name, scb_status(dev), scb_rdcmd(dev));
1578 scb_wrcbl(dev, CONF_LINK);
1579 scb_command(dev, 0xf000|SCB_CUstart);
1580 outb(0,ioaddr+SIGNAL_CA);
1581 iboguscount = 100;
1582 }
1583 else
1584 {
1585 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1586 return;
1587 }
1588 }
1589 }
1590 }
1591
1592 clear_loopback(dev);
1593 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1594
1595 lp->init_time = jiffies;
1596 #if NET_DEBUG > 6
1597 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1598 #endif
1599 return;
1600 }
1601
1602 static void eexp_setup_filter(struct net_device *dev)
1603 {
1604 struct dev_mc_list *dmi = dev->mc_list;
1605 unsigned short ioaddr = dev->base_addr;
1606 int count = dev->mc_count;
1607 int i;
1608 if (count > 8) {
1609 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1610 dev->name, count);
1611 count = 8;
1612 }
1613
1614 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1615 outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1616 for (i = 0; i < count; i++) {
1617 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1618 if (!dmi) {
1619 printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1620 break;
1621 }
1622 if (dmi->dmi_addrlen != ETH_ALEN) {
1623 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1624 continue;
1625 }
1626 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1627 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1628 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1629 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1630 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1631 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1632 }
1633 }
1634
1635 /*
1636 * Set or clear the multicast filter for this adaptor.
1637 */
1638 static void
1639 eexp_set_multicast(struct net_device *dev)
1640 {
1641 unsigned short ioaddr = dev->base_addr;
1642 struct net_local *lp = netdev_priv(dev);
1643 int kick = 0, i;
1644 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1645 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1646 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1647 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1648 ioaddr+SHADOW(CONF_PROMISC));
1649 lp->was_promisc = dev->flags & IFF_PROMISC;
1650 kick = 1;
1651 }
1652 if (!(dev->flags & IFF_PROMISC)) {
1653 eexp_setup_filter(dev);
1654 if (lp->old_mc_count != dev->mc_count) {
1655 kick = 1;
1656 lp->old_mc_count = dev->mc_count;
1657 }
1658 }
1659 if (kick) {
1660 unsigned long oj;
1661 scb_command(dev, SCB_CUsuspend);
1662 outb(0, ioaddr+SIGNAL_CA);
1663 outb(0, ioaddr+SIGNAL_CA);
1664 #if 0
1665 printk("%s: waiting for CU to go suspended\n", dev->name);
1666 #endif
1667 oj = jiffies;
1668 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1669 ((jiffies-oj) < 2000));
1670 if (SCB_CUstat(scb_status(dev)) == 2)
1671 printk("%s: warning, CU didn't stop\n", dev->name);
1672 lp->started &= ~(STARTED_CU);
1673 scb_wrcbl(dev, CONF_LINK);
1674 scb_command(dev, SCB_CUstart);
1675 outb(0, ioaddr+SIGNAL_CA);
1676 }
1677 }
1678
1679
1680 /*
1681 * MODULE stuff
1682 */
1683
1684 #ifdef MODULE
1685
1686 #define EEXP_MAX_CARDS 4 /* max number of cards to support */
1687
1688 static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1689 static int irq[EEXP_MAX_CARDS];
1690 static int io[EEXP_MAX_CARDS];
1691
1692 module_param_array(io, int, NULL, 0);
1693 module_param_array(irq, int, NULL, 0);
1694 MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1695 MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1696 MODULE_LICENSE("GPL");
1697
1698
1699 /* Ideally the user would give us io=, irq= for every card. If any parameters
1700 * are specified, we verify and then use them. If no parameters are given, we
1701 * autoprobe for one card only.
1702 */
1703 int init_module(void)
1704 {
1705 struct net_device *dev;
1706 int this_dev, found = 0;
1707
1708 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1709 dev = alloc_etherdev(sizeof(struct net_local));
1710 dev->irq = irq[this_dev];
1711 dev->base_addr = io[this_dev];
1712 if (io[this_dev] == 0) {
1713 if (this_dev)
1714 break;
1715 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1716 }
1717 if (do_express_probe(dev) == 0) {
1718 dev_eexp[this_dev] = dev;
1719 found++;
1720 continue;
1721 }
1722 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1723 free_netdev(dev);
1724 break;
1725 }
1726 if (found)
1727 return 0;
1728 return -ENXIO;
1729 }
1730
1731 void cleanup_module(void)
1732 {
1733 int this_dev;
1734
1735 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1736 struct net_device *dev = dev_eexp[this_dev];
1737 if (dev) {
1738 unregister_netdev(dev);
1739 free_netdev(dev);
1740 }
1741 }
1742 }
1743 #endif
1744
1745 /*
1746 * Local Variables:
1747 * c-file-style: "linux"
1748 * tab-width: 8
1749 * End:
1750 */
Support for the Chinese Samsung S3C2440 based development boards