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wireless: checkpatch cleanups
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / eexpress.c
CommitLineData
1da177e4
LT		 1/* Intel EtherExpress 16 device driver for Linux
2 *
3 * Written by John Sullivan, 1995
4 * based on original code by Donald Becker, with changes by
5 * Alan Cox and Pauline Middelink.
6 *
7 * Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
8 *
9 * Many modifications, and currently maintained, by
10 * Philip Blundell <philb@gnu.org>
11 * Added the Compaq LTE Alan Cox <alan@redhat.com>
12 * Added MCA support Adam Fritzler <mid@auk.cx>
13 *
14 * Note - this driver is experimental still - it has problems on faster
15 * machines. Someone needs to sit down and go through it line by line with
16 * a databook...
17 */
18
19/* The EtherExpress 16 is a fairly simple card, based on a shared-memory
20 * design using the i82586 Ethernet coprocessor. It bears no relationship,
21 * as far as I know, to the similarly-named "EtherExpress Pro" range.
22 *
23 * Historically, Linux support for these cards has been very bad. However,
24 * things seem to be getting better slowly.
25 */
26
27/* If your card is confused about what sort of interface it has (eg it
28 * persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
29 * or 'SOFTSET /LISA' from DOS seems to help.
30 */
31
32/* Here's the scoop on memory mapping.
33 *
34 * There are three ways to access EtherExpress card memory: either using the
35 * shared-memory mapping, or using PIO through the dataport, or using PIO
36 * through the "shadow memory" ports.
37 *
38 * The shadow memory system works by having the card map some of its memory
39 * as follows:
40 *
41 * (the low five bits of the SMPTR are ignored)
42 *
43 * base+0x4000..400f memory at SMPTR+0..15
44 * base+0x8000..800f memory at SMPTR+16..31
45 * base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently)
46 * base+0xc008..c00f memory at 0x0008..0x000f
47 *
48 * This last set (the one at c008) is particularly handy because the SCB
49 * lives at 0x0008. So that set of ports gives us easy random access to data
50 * in the SCB without having to mess around setting up pointers and the like.
51 * We always use this method to access the SCB (via the scb_xx() functions).
52 *
53 * Dataport access works by aiming the appropriate (read or write) pointer
54 * at the first address you're interested in, and then reading or writing from
55 * the dataport. The pointers auto-increment after each transfer. We use
56 * this for data transfer.
57 *
58 * We don't use the shared-memory system because it allegedly doesn't work on
59 * all cards, and because it's a bit more prone to go wrong (it's one more
60 * thing to configure...).
61 */
62
63/* Known bugs:
64 *
65 * - The card seems to want to give us two interrupts every time something
66 * happens, where just one would be better.
67 */
68
69/*
70 *
71 * Note by Zoltan Szilagyi 10-12-96:
72 *
73 * I've succeeded in eliminating the "CU wedged" messages, and hence the
74 * lockups, which were only occurring with cards running in 8-bit mode ("force
75 * 8-bit operation" in Intel's SoftSet utility). This version of the driver
76 * sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
77 * CU before submitting a packet for transmission, and then restarts it as soon
78 * as the process of handing the packet is complete. This is definitely an
79 * unnecessary slowdown if the card is running in 16-bit mode; therefore one
6aa20a22 80 * should detect 16-bit vs 8-bit mode from the EEPROM settings and act
1da177e4
LT		 81 * accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
82 * ftp's, which is significantly better than I get in DOS, so the overhead of
83 * stopping and restarting the CU with each transmit is not prohibitive in
84 * practice.
85 *
86 * Update by David Woodhouse 11/5/99:
87 *
88 * I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
89 * I assume that this is because 16-bit accesses are actually handled as two
90 * 8-bit accesses.
91 */
92
93#ifdef __alpha__
94#define LOCKUP16 1
95#endif
96#ifndef LOCKUP16
97#define LOCKUP16 0
98#endif
6aa20a22 99
1da177e4
LT		 100#include <linux/module.h>
101#include <linux/kernel.h>
102#include <linux/types.h>
103#include <linux/fcntl.h>
104#include <linux/interrupt.h>
105#include <linux/ioport.h>
106#include <linux/string.h>
107#include <linux/in.h>
108#include <linux/delay.h>
109#include <linux/errno.h>
110#include <linux/init.h>
111#include <linux/netdevice.h>
112#include <linux/etherdevice.h>
113#include <linux/skbuff.h>
114#include <linux/slab.h>
115#include <linux/mca-legacy.h>
116#include <linux/spinlock.h>
117#include <linux/bitops.h>
d7ef45b0 118#include <linux/jiffies.h>
1da177e4
LT		 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
136struct net_local
137{
1da177e4
LT		 138 unsigned long last_tx; /* jiffies when last transmit started */
139 unsigned long init_time; /* jiffies when eexp_hw_init586 called */
140 unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
141 unsigned short rx_last; /* last rx buf */
142 unsigned short rx_ptr; /* first rx buf to look at */
143 unsigned short tx_head; /* next free tx buf */
144 unsigned short tx_reap; /* first in-use tx buf */
145 unsigned short tx_tail; /* previous tx buf to tx_head */
146 unsigned short tx_link; /* last known-executing tx buf */
147 unsigned short last_tx_restart; /* set to tx_link when we
148 restart the CU */
149 unsigned char started;
150 unsigned short rx_buf_start;
151 unsigned short rx_buf_end;
152 unsigned short num_tx_bufs;
153 unsigned short num_rx_bufs;
154 unsigned char width; /* 0 for 16bit, 1 for 8bit */
155 unsigned char was_promisc;
156 unsigned char old_mc_count;
157 spinlock_t lock;
158};
159
160/* This is the code and data that is downloaded to the EtherExpress card's
161 * memory at boot time.
162 */
163
164static unsigned short start_code[] = {
165/* 0x0000 */
166 0x0001, /* ISCP: busy - cleared after reset */
167 0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */
168
169 0x0000,0x0000, /* SCB: status, commands */
170 0x0000,0x0000, /* links to first command block,
171 first receive descriptor */
172 0x0000,0x0000, /* CRC error, alignment error counts */
173 0x0000,0x0000, /* out of resources, overrun error counts */
174
175 0x0000,0x0000, /* pad */
176 0x0000,0x0000,
177
178/* 0x20 -- start of 82586 CU program */
179#define CONF_LINK 0x20
6aa20a22 180 0x0000,Cmd_Config,
1da177e4
LT		 181 0x0032, /* link to next command */
182 0x080c, /* 12 bytes follow : fifo threshold=8 */
183 0x2e40, /* don't rx bad frames
184 * SRDY/ARDY => ext. sync. : preamble len=8
185 * take addresses from data buffers
186 * 6 bytes/address
187 */
188 0x6000, /* default backoff method & priority
189 * interframe spacing = 0x60 */
6aa20a22 190 0xf200, /* slot time=0x200
1da177e4
LT		 191 * max collision retry = 0xf */
192#define CONF_PROMISC 0x2e
6aa20a22 193 0x0000, /* no HDLC : normal CRC : enable broadcast
1da177e4
LT		 194 * disable promiscuous/multicast modes */
195 0x003c, /* minimum frame length = 60 octets) */
196
197 0x0000,Cmd_SetAddr,
198 0x003e, /* link to next command */
199#define CONF_HWADDR 0x38
200 0x0000,0x0000,0x0000, /* hardware address placed here */
201
202 0x0000,Cmd_MCast,
203 0x0076, /* link to next command */
204#define CONF_NR_MULTICAST 0x44
205 0x0000, /* number of multicast addresses */
206#define CONF_MULTICAST 0x46
207 0x0000, 0x0000, 0x0000, /* some addresses */
208 0x0000, 0x0000, 0x0000,
209 0x0000, 0x0000, 0x0000,
210 0x0000, 0x0000, 0x0000,
211 0x0000, 0x0000, 0x0000,
212 0x0000, 0x0000, 0x0000,
213 0x0000, 0x0000, 0x0000,
214 0x0000, 0x0000, 0x0000,
215
216#define CONF_DIAG_RESULT 0x76
217 0x0000, Cmd_Diag,
218 0x007c, /* link to next command */
219
220 0x0000,Cmd_TDR|Cmd_INT,
221 0x0084,
222#define CONF_TDR_RESULT 0x82
223 0x0000,
224
225 0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
226 0x0084 /* dummy link */
227};
228
229/* maps irq number to EtherExpress magic value */
230static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
231
232#ifdef CONFIG_MCA_LEGACY
233/* mapping of the first four bits of the second POS register */
234static unsigned short mca_iomap[] = {
235 0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
236 0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
237};
238/* bits 5-7 of the second POS register */
239static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
6aa20a22 240#endif
1da177e4
LT		 241
242/*
243 * Prototypes for Linux interface
244 */
245
246static int eexp_open(struct net_device *dev);
247static int eexp_close(struct net_device *dev);
248static void eexp_timeout(struct net_device *dev);
1da177e4
LT		 249static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
250
7d12e780 251static irqreturn_t eexp_irq(int irq, void *dev_addr);
1da177e4
LT		 252static void eexp_set_multicast(struct net_device *dev);
253
254/*
255 * Prototypes for hardware access functions
256 */
257
258static void eexp_hw_rx_pio(struct net_device *dev);
259static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
260 unsigned short len);
261static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
262static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
263 unsigned char location);
264
265static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
266static void eexp_hw_txrestart(struct net_device *dev);
267
268static void eexp_hw_txinit (struct net_device *dev);
269static void eexp_hw_rxinit (struct net_device *dev);
270
271static void eexp_hw_init586 (struct net_device *dev);
272static void eexp_setup_filter (struct net_device *dev);
273
274static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
275enum eexp_iftype {AUI=0, BNC=1, TPE=2};
276
277#define STARTED_RU 2
278#define STARTED_CU 1
279
280/*
281 * Primitive hardware access functions.
282 */
283
284static inline unsigned short scb_status(struct net_device *dev)
285{
286 return inw(dev->base_addr + 0xc008);
287}
288
289static inline unsigned short scb_rdcmd(struct net_device *dev)
290{
291 return inw(dev->base_addr + 0xc00a);
292}
293
294static inline void scb_command(struct net_device *dev, unsigned short cmd)
295{
296 outw(cmd, dev->base_addr + 0xc00a);
297}
298
299static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
300{
301 outw(val, dev->base_addr + 0xc00c);
302}
303
304static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
305{
306 outw(val, dev->base_addr + 0xc00e);
307}
308
309static inline void set_loopback(struct net_device *dev)
310{
311 outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
312}
313
314static inline void clear_loopback(struct net_device *dev)
315{
316 outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
317}
318
319static inline unsigned short int SHADOW(short int addr)
320{
321 addr &= 0x1f;
322 if (addr > 0xf) addr += 0x3ff0;
323 return addr + 0x4000;
324}
325
326/*
327 * Linux interface
328 */
329
330/*
331 * checks for presence of EtherExpress card
332 */
333
334static int __init do_express_probe(struct net_device *dev)
335{
336 unsigned short *port;
337 static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
338 unsigned short ioaddr = dev->base_addr;
339 int dev_irq = dev->irq;
340 int err;
341
1da177e4
LT		 342 dev->if_port = 0xff; /* not set */
343
344#ifdef CONFIG_MCA_LEGACY
345 if (MCA_bus) {
346 int slot = 0;
347
348 /*
349 * Only find one card at a time. Subsequent calls
350 * will find others, however, proper multicard MCA
351 * probing and setup can't be done with the
352 * old-style Space.c init routines. -- ASF
353 */
354 while (slot != MCA_NOTFOUND) {
355 int pos0, pos1;
6aa20a22 356
1da177e4
LT		 357 slot = mca_find_unused_adapter(0x628B, slot);
358 if (slot == MCA_NOTFOUND)
359 break;
360
361 pos0 = mca_read_stored_pos(slot, 2);
362 pos1 = mca_read_stored_pos(slot, 3);
363 ioaddr = mca_iomap[pos1&0xf];
364
365 dev->irq = mca_irqmap[(pos1>>4)&0x7];
6aa20a22 366
1da177e4
LT		 367 /*
368 * XXX: Transciever selection is done
6aa20a22 369 * differently on the MCA version.
1da177e4
LT		 370 * How to get it to select something
371 * other than external/AUI is currently
372 * unknown. This code is just for looks. -- ASF
373 */
374 if ((pos0 & 0x7) == 0x1)
375 dev->if_port = AUI;
376 else if ((pos0 & 0x7) == 0x5) {
377 if (pos1 & 0x80)
378 dev->if_port = BNC;
379 else
380 dev->if_port = TPE;
381 }
382
383 mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
384 mca_set_adapter_procfn(slot, NULL, dev);
385 mca_mark_as_used(slot);
386
387 break;
388 }
389 }
390#endif
391 if (ioaddr&0xfe00) {
392 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
393 return -EBUSY;
394 err = eexp_hw_probe(dev,ioaddr);
395 release_region(ioaddr, EEXP_IO_EXTENT);
396 return err;
397 } else if (ioaddr)
398 return -ENXIO;
399
400 for (port=&ports[0] ; *port ; port++ )
401 {
402 unsigned short sum = 0;
403 int i;
404 if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
405 continue;
406 for ( i=0 ; i<4 ; i++ )
407 {
408 unsigned short t;
409 t = inb(*port + ID_PORT);
410 sum |= (t>>4) << ((t & 0x03)<<2);
411 }
412 if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
413 release_region(*port, EEXP_IO_EXTENT);
414 return 0;
415 }
416 release_region(*port, EEXP_IO_EXTENT);
417 dev->irq = dev_irq;
418 }
419 return -ENODEV;
420}
421
422#ifndef MODULE
423struct net_device * __init express_probe(int unit)
424{
425 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
426 int err;
427
428 if (!dev)
429 return ERR_PTR(-ENOMEM);
430
431 sprintf(dev->name, "eth%d", unit);
432 netdev_boot_setup_check(dev);
433
434 err = do_express_probe(dev);
b1fc5505
HX		 435 if (!err)
436 return dev;
1da177e4
LT		 437 free_netdev(dev);
438 return ERR_PTR(err);
439}
440#endif
441
442/*
443 * open and initialize the adapter, ready for use
444 */
445
446static int eexp_open(struct net_device *dev)
447{
448 int ret;
449 unsigned short ioaddr = dev->base_addr;
450 struct net_local *lp = netdev_priv(dev);
451
452#if NET_DEBUG > 6
453 printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
454#endif
455
456 if (!dev->irq || !irqrmap[dev->irq])
457 return -ENXIO;
458
28fc1f5a
JG		 459 ret = request_irq(dev->irq, &eexp_irq, 0, dev->name, dev);
460 if (ret)
461 return ret;
1da177e4
LT		 462
463 if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
464 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
465 , ioaddr);
466 goto err_out1;
467 }
468 if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
469 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
470 , ioaddr+0x4000);
471 goto err_out2;
472 }
473 if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
474 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
475 , ioaddr+0x8000);
476 goto err_out3;
477 }
478 if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
479 printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
480 , ioaddr+0xc000);
481 goto err_out4;
482 }
6aa20a22 483
1da177e4
LT		 484 if (lp->width) {
485 printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
486 outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
487 }
488
489 eexp_hw_init586(dev);
490 netif_start_queue(dev);
491#if NET_DEBUG > 6
492 printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
493#endif
494 return 0;
495
496 err_out4:
497 release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
498 err_out3:
499 release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
500 err_out2:
501 release_region(ioaddr, EEXP_IO_EXTENT);
502 err_out1:
503 free_irq(dev->irq, dev);
504 return -EBUSY;
505}
506
507/*
508 * close and disable the interface, leaving the 586 in reset.
509 */
510
511static int eexp_close(struct net_device *dev)
512{
513 unsigned short ioaddr = dev->base_addr;
514 struct net_local *lp = netdev_priv(dev);
515
516 int irq = dev->irq;
517
518 netif_stop_queue(dev);
6aa20a22 519
1da177e4
LT		 520 outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
521 lp->started = 0;
522 scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
523 outb(0,ioaddr+SIGNAL_CA);
524 free_irq(irq,dev);
525 outb(i586_RST,ioaddr+EEPROM_Ctrl);
526 release_region(ioaddr, EEXP_IO_EXTENT);
527 release_region(ioaddr+0x4000, 16);
528 release_region(ioaddr+0x8000, 16);
529 release_region(ioaddr+0xc000, 16);
530
531 return 0;
532}
533
1da177e4
LT		 534/*
535 * This gets called when a higher level thinks we are broken. Check that
536 * nothing has become jammed in the CU.
537 */
538
539static void unstick_cu(struct net_device *dev)
540{
541 struct net_local *lp = netdev_priv(dev);
542 unsigned short ioaddr = dev->base_addr;
543
544 if (lp->started)
545 {
d7ef45b0 546 if (time_after(jiffies, dev->trans_start + 50))
1da177e4
LT		 547 {
548 if (lp->tx_link==lp->last_tx_restart)
549 {
550 unsigned short boguscount=200,rsst;
551 printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
552 dev->name, scb_status(dev));
553 eexp_hw_txinit(dev);
554 lp->last_tx_restart = 0;
555 scb_wrcbl(dev, lp->tx_link);
556 scb_command(dev, SCB_CUstart);
557 outb(0,ioaddr+SIGNAL_CA);
558 while (!SCB_complete(rsst=scb_status(dev)))
559 {
560 if (!--boguscount)
561 {
562 boguscount=200;
563 printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
564 dev->name,rsst);
565 scb_wrcbl(dev, lp->tx_link);
566 scb_command(dev, SCB_CUstart);
567 outb(0,ioaddr+SIGNAL_CA);
568 }
569 }
570 netif_wake_queue(dev);
571 }
572 else
573 {
574 unsigned short status = scb_status(dev);
575 if (SCB_CUdead(status))
576 {
577 unsigned short txstatus = eexp_hw_lasttxstat(dev);
578 printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
579 dev->name, status, txstatus);
580 eexp_hw_txrestart(dev);
581 }
582 else
583 {
584 unsigned short txstatus = eexp_hw_lasttxstat(dev);
585 if (netif_queue_stopped(dev) && !txstatus)
586 {
587 printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
588 dev->name,status,txstatus);
589 eexp_hw_init586(dev);
590 netif_wake_queue(dev);
591 }
592 else
593 {
594 printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
595 }
596 }
597 }
598 }
599 }
600 else
601 {
d7ef45b0 602 if (time_after(jiffies, lp->init_time + 10))
1da177e4
LT		 603 {
604 unsigned short status = scb_status(dev);
605 printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
606 dev->name, status);
607 eexp_hw_init586(dev);
608 netif_wake_queue(dev);
609 }
610 }
611}
612
613static void eexp_timeout(struct net_device *dev)
614{
615 struct net_local *lp = netdev_priv(dev);
616#ifdef CONFIG_SMP
617 unsigned long flags;
618#endif
619 int status;
6aa20a22 620
1da177e4
LT		 621 disable_irq(dev->irq);
622
623 /*
624 * Best would be to use synchronize_irq(); spin_lock() here
625 * lets make it work first..
626 */
6aa20a22 627
1da177e4
LT		 628#ifdef CONFIG_SMP
629 spin_lock_irqsave(&lp->lock, flags);
630#endif
631
632 status = scb_status(dev);
633 unstick_cu(dev);
634 printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
635 (SCB_complete(status)?"lost interrupt":
636 "board on fire"));
09f75cd7 637 dev->stats.tx_errors++;
1da177e4
LT		 638 lp->last_tx = jiffies;
639 if (!SCB_complete(status)) {
640 scb_command(dev, SCB_CUabort);
641 outb(0,dev->base_addr+SIGNAL_CA);
642 }
6aa20a22 643 netif_wake_queue(dev);
1da177e4
LT		 644#ifdef CONFIG_SMP
645 spin_unlock_irqrestore(&lp->lock, flags);
646#endif
647}
648
649/*
650 * Called to transmit a packet, or to allow us to right ourselves
651 * if the kernel thinks we've died.
652 */
653static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
654{
1da177e4
LT		 655 short length = buf->len;
656#ifdef CONFIG_SMP
0e6f7329 657 struct net_local *lp = netdev_priv(dev);
1da177e4
LT		 658 unsigned long flags;
659#endif
660
661#if NET_DEBUG > 6
662 printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
663#endif
664
665 if (buf->len < ETH_ZLEN) {
5b057c6b 666 if (skb_padto(buf, ETH_ZLEN))
1da177e4
LT		 667 return 0;
668 length = ETH_ZLEN;
669 }
670
671 disable_irq(dev->irq);
672
673 /*
674 * Best would be to use synchronize_irq(); spin_lock() here
675 * lets make it work first..
676 */
6aa20a22 677
1da177e4
LT		 678#ifdef CONFIG_SMP
679 spin_lock_irqsave(&lp->lock, flags);
680#endif
6aa20a22 681
1da177e4
LT		 682 {
683 unsigned short *data = (unsigned short *)buf->data;
684
09f75cd7 685 dev->stats.tx_bytes += length;
1da177e4
LT		 686
687 eexp_hw_tx_pio(dev,data,length);
688 }
689 dev_kfree_skb(buf);
690#ifdef CONFIG_SMP
691 spin_unlock_irqrestore(&lp->lock, flags);
692#endif
693 enable_irq(dev->irq);
694 return 0;
695}
696
1da177e4
LT		 697/*
698 * Handle an EtherExpress interrupt
699 * If we've finished initializing, start the RU and CU up.
700 * If we've already started, reap tx buffers, handle any received packets,
701 * check to make sure we've not become wedged.
702 */
703
704static unsigned short eexp_start_irq(struct net_device *dev,
705 unsigned short status)
706{
707 unsigned short ack_cmd = SCB_ack(status);
708 struct net_local *lp = netdev_priv(dev);
709 unsigned short ioaddr = dev->base_addr;
710 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
711 short diag_status, tdr_status;
712 while (SCB_CUstat(status)==2)
713 status = scb_status(dev);
714#if NET_DEBUG > 4
715 printk("%s: CU went non-active (status %04x)\n",
716 dev->name, status);
717#endif
718
719 outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
720 diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
721 if (diag_status & 1<<11) {
6aa20a22 722 printk(KERN_WARNING "%s: 82586 failed self-test\n",
1da177e4
LT		 723 dev->name);
724 } else if (!(diag_status & 1<<13)) {
725 printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
726 }
727
728 outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
729 tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
730 if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
731 printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : "");
6aa20a22 732 }
1da177e4
LT		 733 else if (tdr_status & TDR_XCVRPROBLEM) {
734 printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
735 }
736 else if (tdr_status & TDR_LINKOK) {
737#if NET_DEBUG > 4
738 printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
739#endif
740 } else {
741 printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
742 tdr_status);
743 }
6aa20a22 744
1da177e4
LT		 745 lp->started |= STARTED_CU;
746 scb_wrcbl(dev, lp->tx_link);
747 /* if the RU isn't running, start it now */
748 if (!(lp->started & STARTED_RU)) {
749 ack_cmd |= SCB_RUstart;
750 scb_wrrfa(dev, lp->rx_buf_start);
751 lp->rx_ptr = lp->rx_buf_start;
752 lp->started |= STARTED_RU;
753 }
754 ack_cmd |= SCB_CUstart | 0x2000;
755 }
756
6aa20a22 757 if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
1da177e4
LT		 758 lp->started|=STARTED_RU;
759
760 return ack_cmd;
761}
762
763static void eexp_cmd_clear(struct net_device *dev)
764{
765 unsigned long int oldtime = jiffies;
1c0d6dcf 766 while (scb_rdcmd(dev) && (time_before(jiffies, oldtime + 10)));
1da177e4
LT		 767 if (scb_rdcmd(dev)) {
768 printk("%s: command didn't clear\n", dev->name);
769 }
770}
6aa20a22 771
28fc1f5a 772static irqreturn_t eexp_irq(int dummy, void *dev_info)
1da177e4
LT		 773{
774 struct net_device *dev = dev_info;
775 struct net_local *lp;
776 unsigned short ioaddr,status,ack_cmd;
777 unsigned short old_read_ptr, old_write_ptr;
778
1da177e4
LT		 779 lp = netdev_priv(dev);
780 ioaddr = dev->base_addr;
781
782 spin_lock(&lp->lock);
783
784 old_read_ptr = inw(ioaddr+READ_PTR);
785 old_write_ptr = inw(ioaddr+WRITE_PTR);
786
28fc1f5a 787 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1da177e4 788
6aa20a22 789
1da177e4
LT		 790 status = scb_status(dev);
791
792#if NET_DEBUG > 4
793 printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
794#endif
795
796 if (lp->started == (STARTED_CU | STARTED_RU)) {
797
798 do {
799 eexp_cmd_clear(dev);
800
801 ack_cmd = SCB_ack(status);
802 scb_command(dev, ack_cmd);
803 outb(0,ioaddr+SIGNAL_CA);
804
805 eexp_cmd_clear(dev);
806
807 if (SCB_complete(status)) {
808 if (!eexp_hw_lasttxstat(dev)) {
809 printk("%s: tx interrupt but no status\n", dev->name);
810 }
811 }
6aa20a22
JG		 812
813 if (SCB_rxdframe(status))
1da177e4
LT		 814 eexp_hw_rx_pio(dev);
815
816 status = scb_status(dev);
817 } while (status & 0xc000);
818
6aa20a22 819 if (SCB_RUdead(status))
1da177e4
LT		 820 {
821 printk(KERN_WARNING "%s: RU stopped: status %04x\n",
822 dev->name,status);
823#if 0
824 printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
825 outw(lp->cur_rfd, ioaddr+READ_PTR);
826 printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
827 outw(lp->cur_rfd+6, ioaddr+READ_PTR);
828 printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
829 outw(rbd, ioaddr+READ_PTR);
830 printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
831 outw(rbd+8, ioaddr+READ_PTR);
832 printk("[%04x]\n", inw(ioaddr+DATAPORT));
833#endif
09f75cd7 834 dev->stats.rx_errors++;
1da177e4
LT		 835#if 1
836 eexp_hw_rxinit(dev);
837#else
838 lp->cur_rfd = lp->first_rfd;
839#endif
840 scb_wrrfa(dev, lp->rx_buf_start);
841 scb_command(dev, SCB_RUstart);
842 outb(0,ioaddr+SIGNAL_CA);
6aa20a22 843 }
1da177e4 844 } else {
6aa20a22 845 if (status & 0x8000)
1da177e4
LT		 846 ack_cmd = eexp_start_irq(dev, status);
847 else
848 ack_cmd = SCB_ack(status);
849 scb_command(dev, ack_cmd);
850 outb(0,ioaddr+SIGNAL_CA);
851 }
852
853 eexp_cmd_clear(dev);
854
28fc1f5a 855 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1da177e4 856
6aa20a22 857#if NET_DEBUG > 6
1da177e4
LT		 858 printk("%s: leaving eexp_irq()\n", dev->name);
859#endif
860 outw(old_read_ptr, ioaddr+READ_PTR);
861 outw(old_write_ptr, ioaddr+WRITE_PTR);
6aa20a22 862
1da177e4
LT		 863 spin_unlock(&lp->lock);
864 return IRQ_HANDLED;
865}
866
867/*
868 * Hardware access functions
869 */
870
871/*
872 * Set the cable type to use.
873 */
874
875static void eexp_hw_set_interface(struct net_device *dev)
876{
877 unsigned char oldval = inb(dev->base_addr + 0x300e);
878 oldval &= ~0x82;
879 switch (dev->if_port) {
880 case TPE:
881 oldval |= 0x2;
882 case BNC:
883 oldval |= 0x80;
884 break;
885 }
886 outb(oldval, dev->base_addr+0x300e);
887 mdelay(20);
888}
889
890/*
891 * Check all the receive buffers, and hand any received packets
892 * to the upper levels. Basic sanity check on each frame
893 * descriptor, though we don't bother trying to fix broken ones.
894 */
895
896static void eexp_hw_rx_pio(struct net_device *dev)
897{
898 struct net_local *lp = netdev_priv(dev);
899 unsigned short rx_block = lp->rx_ptr;
900 unsigned short boguscount = lp->num_rx_bufs;
901 unsigned short ioaddr = dev->base_addr;
902 unsigned short status;
903
904#if NET_DEBUG > 6
905 printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
906#endif
907
908 do {
909 unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
6aa20a22 910
1da177e4
LT		 911 outw(rx_block, ioaddr + READ_PTR);
912 status = inw(ioaddr + DATAPORT);
913
914 if (FD_Done(status))
915 {
916 rfd_cmd = inw(ioaddr + DATAPORT);
917 rx_next = inw(ioaddr + DATAPORT);
918 pbuf = inw(ioaddr + DATAPORT);
6aa20a22 919
1da177e4
LT		 920 outw(pbuf, ioaddr + READ_PTR);
921 pkt_len = inw(ioaddr + DATAPORT);
922
923 if (rfd_cmd!=0x0000)
924 {
925 printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
926 dev->name, rfd_cmd);
927 continue;
928 }
929 else if (pbuf!=rx_block+0x16)
930 {
6aa20a22 931 printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
1da177e4
LT		 932 dev->name, rx_block+0x16, pbuf);
933 continue;
934 }
6aa20a22 935 else if ((pkt_len & 0xc000)!=0xc000)
1da177e4
LT		 936 {
937 printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
938 dev->name, pkt_len & 0xc000);
939 continue;
940 }
6aa20a22 941 else if (!FD_OK(status))
1da177e4 942 {
09f75cd7 943 dev->stats.rx_errors++;
1da177e4 944 if (FD_CRC(status))
09f75cd7 945 dev->stats.rx_crc_errors++;
1da177e4 946 if (FD_Align(status))
09f75cd7 947 dev->stats.rx_frame_errors++;
1da177e4 948 if (FD_Resrc(status))
09f75cd7 949 dev->stats.rx_fifo_errors++;
1da177e4 950 if (FD_DMA(status))
09f75cd7 951 dev->stats.rx_over_errors++;
1da177e4 952 if (FD_Short(status))
09f75cd7 953 dev->stats.rx_length_errors++;
1da177e4
LT		 954 }
955 else
956 {
957 struct sk_buff *skb;
958 pkt_len &= 0x3fff;
959 skb = dev_alloc_skb(pkt_len+16);
960 if (skb == NULL)
961 {
962 printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
09f75cd7 963 dev->stats.rx_dropped++;
1da177e4
LT		 964 break;
965 }
1da177e4
LT		 966 skb_reserve(skb, 2);
967 outw(pbuf+10, ioaddr+READ_PTR);
968 insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
969 skb->protocol = eth_type_trans(skb,dev);
970 netif_rx(skb);
971 dev->last_rx = jiffies;
09f75cd7
JG		 972 dev->stats.rx_packets++;
973 dev->stats.rx_bytes += pkt_len;
1da177e4
LT		 974 }
975 outw(rx_block, ioaddr+WRITE_PTR);
976 outw(0, ioaddr+DATAPORT);
977 outw(0, ioaddr+DATAPORT);
978 rx_block = rx_next;
979 }
980 } while (FD_Done(status) && boguscount--);
981 lp->rx_ptr = rx_block;
982}
983
984/*
985 * Hand a packet to the card for transmission
986 * If we get here, we MUST have already checked
987 * to make sure there is room in the transmit
988 * buffer region.
989 */
990
991static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
992 unsigned short len)
993{
994 struct net_local *lp = netdev_priv(dev);
995 unsigned short ioaddr = dev->base_addr;
996
997 if (LOCKUP16 || lp->width) {
998 /* Stop the CU so that there is no chance that it
999 jumps off to a bogus address while we are writing the
6aa20a22 1000 pointer to the next transmit packet in 8-bit mode --
1da177e4 1001 this eliminates the "CU wedged" errors in 8-bit mode.
6aa20a22 1002 (Zoltan Szilagyi 10-12-96) */
1da177e4
LT		 1003 scb_command(dev, SCB_CUsuspend);
1004 outw(0xFFFF, ioaddr+SIGNAL_CA);
1005 }
1006
1007 outw(lp->tx_head, ioaddr + WRITE_PTR);
1008
1009 outw(0x0000, ioaddr + DATAPORT);
1010 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1011 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1012 outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
1013
1014 outw(0x0000, ioaddr + DATAPORT);
1015 outw(0x0000, ioaddr + DATAPORT);
1016 outw(lp->tx_head+0x08, ioaddr + DATAPORT);
1017
1018 outw(0x8000|len, ioaddr + DATAPORT);
1019 outw(-1, ioaddr + DATAPORT);
1020 outw(lp->tx_head+0x16, ioaddr + DATAPORT);
1021 outw(0, ioaddr + DATAPORT);
1022
1023 outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
1024
1025 outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
1026 outw(lp->tx_head, ioaddr + DATAPORT);
1027
1028 dev->trans_start = jiffies;
1029 lp->tx_tail = lp->tx_head;
1030 if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1031 lp->tx_head = TX_BUF_START;
1032 else
1033 lp->tx_head += TX_BUF_SIZE;
1034 if (lp->tx_head != lp->tx_reap)
1035 netif_wake_queue(dev);
6aa20a22 1036
1da177e4
LT		 1037 if (LOCKUP16 || lp->width) {
1038 /* Restart the CU so that the packet can actually
1039 be transmitted. (Zoltan Szilagyi 10-12-96) */
1040 scb_command(dev, SCB_CUresume);
1041 outw(0xFFFF, ioaddr+SIGNAL_CA);
1042 }
1043
09f75cd7 1044 dev->stats.tx_packets++;
1da177e4
LT		 1045 lp->last_tx = jiffies;
1046}
1047
1048/*
1049 * Sanity check the suspected EtherExpress card
1050 * Read hardware address, reset card, size memory and initialize buffer
1051 * memory pointers. These are held in dev->priv, in case someone has more
1052 * than one card in a machine.
1053 */
1054
1055static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
1056{
1057 unsigned short hw_addr[3];
1058 unsigned char buswidth;
1059 unsigned int memory_size;
1060 int i;
1061 unsigned short xsum = 0;
1062 struct net_local *lp = netdev_priv(dev);
1063
1064 printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
1065
1066 outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
1067 outb(0, ioaddr+EEPROM_Ctrl);
1068 udelay(500);
1069 outb(i586_RST, ioaddr+EEPROM_Ctrl);
1070
1071 hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
1072 hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
1073 hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
1074
1075 /* Standard Address or Compaq LTE Address */
1076 if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
6aa20a22 1077 (hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
1da177e4
LT		 1078 {
1079 printk(" rejected: invalid address %04x%04x%04x\n",
1080 hw_addr[2],hw_addr[1],hw_addr[0]);
1081 return -ENODEV;
1082 }
1083
1084 /* Calculate the EEPROM checksum. Carry on anyway if it's bad,
1085 * though.
1086 */
1087 for (i = 0; i < 64; i++)
1088 xsum += eexp_hw_readeeprom(ioaddr, i);
1089 if (xsum != 0xbaba)
1090 printk(" (bad EEPROM xsum 0x%02x)", xsum);
1091
1092 dev->base_addr = ioaddr;
1093 for ( i=0 ; i<6 ; i++ )
1094 dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
1095
1096 {
1097 static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
1098 unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
1099
1100 /* Use the IRQ from EEPROM if none was given */
1101 if (!dev->irq)
1102 dev->irq = irqmap[setupval>>13];
1103
1104 if (dev->if_port == 0xff) {
1105 dev->if_port = !(setupval & 0x1000) ? AUI :
1106 eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
1107 }
1108
1109 buswidth = !((setupval & 0x400) >> 10);
1110 }
1111
1112 memset(lp, 0, sizeof(struct net_local));
1113 spin_lock_init(&lp->lock);
1114
6aa20a22 1115 printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
1da177e4 1116 eexp_ifmap[dev->if_port], buswidth?8:16);
6aa20a22 1117
1da177e4
LT		 1118 if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
1119 return -EBUSY;
1120
1121 eexp_hw_set_interface(dev);
6aa20a22 1122
1da177e4 1123 release_region(dev->base_addr + 0x300e, 1);
6aa20a22 1124
1da177e4
LT		 1125 /* Find out how much RAM we have on the card */
1126 outw(0, dev->base_addr + WRITE_PTR);
1127 for (i = 0; i < 32768; i++)
1128 outw(0, dev->base_addr + DATAPORT);
1129
1130 for (memory_size = 0; memory_size < 64; memory_size++)
1131 {
1132 outw(memory_size<<10, dev->base_addr + READ_PTR);
1133 if (inw(dev->base_addr+DATAPORT))
1134 break;
1135 outw(memory_size<<10, dev->base_addr + WRITE_PTR);
1136 outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
1137 outw(memory_size<<10, dev->base_addr + READ_PTR);
1138 if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
1139 break;
1140 }
1141
1142 /* Sort out the number of buffers. We may have 16, 32, 48 or 64k
1143 * of RAM to play with.
1144 */
1145 lp->num_tx_bufs = 4;
1146 lp->rx_buf_end = 0x3ff6;
1147 switch (memory_size)
1148 {
1149 case 64:
1150 lp->rx_buf_end += 0x4000;
1151 case 48:
1152 lp->num_tx_bufs += 4;
1153 lp->rx_buf_end += 0x4000;
1154 case 32:
1155 lp->rx_buf_end += 0x4000;
1156 case 16:
1157 printk(", %dk RAM)\n", memory_size);
1158 break;
1159 default:
1160 printk(") bad memory size (%dk).\n", memory_size);
1161 return -ENODEV;
1162 break;
1163 }
1164
1165 lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
1166 lp->width = buswidth;
1167
1168 dev->open = eexp_open;
1169 dev->stop = eexp_close;
1170 dev->hard_start_xmit = eexp_xmit;
1da177e4
LT		 1171 dev->set_multicast_list = &eexp_set_multicast;
1172 dev->tx_timeout = eexp_timeout;
1173 dev->watchdog_timeo = 2*HZ;
b1fc5505
HX		 1174
1175 return register_netdev(dev);
1da177e4
LT		 1176}
1177
1178/*
1179 * Read a word from the EtherExpress on-board serial EEPROM.
1180 * The EEPROM contains 64 words of 16 bits.
1181 */
1182static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
1183 unsigned char location)
1184{
1185 unsigned short cmd = 0x180|(location&0x7f);
1186 unsigned short rval = 0,wval = EC_CS|i586_RST;
1187 int i;
1188
1189 outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
1190 for (i=0x100 ; i ; i>>=1 )
1191 {
1192 if (cmd&i)
1193 wval |= EC_Wr;
1194 else
1195 wval &= ~EC_Wr;
1196
1197 outb(wval,ioaddr+EEPROM_Ctrl);
1198 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1199 eeprom_delay();
1200 outb(wval,ioaddr+EEPROM_Ctrl);
1201 eeprom_delay();
1202 }
1203 wval &= ~EC_Wr;
1204 outb(wval,ioaddr+EEPROM_Ctrl);
1205 for (i=0x8000 ; i ; i>>=1 )
1206 {
1207 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1208 eeprom_delay();
1209 if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
1210 rval |= i;
1211 outb(wval,ioaddr+EEPROM_Ctrl);
1212 eeprom_delay();
1213 }
1214 wval &= ~EC_CS;
1215 outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
1216 eeprom_delay();
1217 outb(wval,ioaddr+EEPROM_Ctrl);
1218 eeprom_delay();
1219 return rval;
1220}
1221
1222/*
1223 * Reap tx buffers and return last transmit status.
1224 * if ==0 then either:
1225 * a) we're not transmitting anything, so why are we here?
1226 * b) we've died.
1227 * otherwise, Stat_Busy(return) means we've still got some packets
1228 * to transmit, Stat_Done(return) means our buffers should be empty
1229 * again
1230 */
1231
1232static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
1233{
1234 struct net_local *lp = netdev_priv(dev);
1235 unsigned short tx_block = lp->tx_reap;
1236 unsigned short status;
1237
1238 if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
1239 return 0x0000;
1240
1241 do
1242 {
1243 outw(tx_block & ~31, dev->base_addr + SM_PTR);
1244 status = inw(dev->base_addr + SHADOW(tx_block));
1245 if (!Stat_Done(status))
1246 {
1247 lp->tx_link = tx_block;
1248 return status;
1249 }
1250 else
1251 {
1252 lp->last_tx_restart = 0;
09f75cd7 1253 dev->stats.collisions += Stat_NoColl(status);
1da177e4
LT		 1254 if (!Stat_OK(status))
1255 {
1256 char *whatsup = NULL;
09f75cd7 1257 dev->stats.tx_errors++;
6aa20a22 1258 if (Stat_Abort(status))
09f75cd7 1259 dev->stats.tx_aborted_errors++;
1da177e4
LT		 1260 if (Stat_TNoCar(status)) {
1261 whatsup = "aborted, no carrier";
09f75cd7 1262 dev->stats.tx_carrier_errors++;
1da177e4
LT		 1263 }
1264 if (Stat_TNoCTS(status)) {
1265 whatsup = "aborted, lost CTS";
09f75cd7 1266 dev->stats.tx_carrier_errors++;
1da177e4
LT		 1267 }
1268 if (Stat_TNoDMA(status)) {
1269 whatsup = "FIFO underran";
09f75cd7 1270 dev->stats.tx_fifo_errors++;
1da177e4
LT		 1271 }
1272 if (Stat_TXColl(status)) {
1273 whatsup = "aborted, too many collisions";
09f75cd7 1274 dev->stats.tx_aborted_errors++;
1da177e4
LT		 1275 }
1276 if (whatsup)
1277 printk(KERN_INFO "%s: transmit %s\n",
1278 dev->name, whatsup);
1279 }
1280 else
09f75cd7 1281 dev->stats.tx_packets++;
1da177e4
LT		 1282 }
1283 if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
1284 lp->tx_reap = tx_block = TX_BUF_START;
1285 else
1286 lp->tx_reap = tx_block += TX_BUF_SIZE;
1287 netif_wake_queue(dev);
1288 }
1289 while (lp->tx_reap != lp->tx_head);
1290
1291 lp->tx_link = lp->tx_tail + 0x08;
1292
1293 return status;
1294}
1295
1296/*
1297 * This should never happen. It is called when some higher routine detects
1298 * that the CU has stopped, to try to restart it from the last packet we knew
1299 * we were working on, or the idle loop if we had finished for the time.
1300 */
1301
1302static void eexp_hw_txrestart(struct net_device *dev)
1303{
1304 struct net_local *lp = netdev_priv(dev);
1305 unsigned short ioaddr = dev->base_addr;
1306
1307 lp->last_tx_restart = lp->tx_link;
1308 scb_wrcbl(dev, lp->tx_link);
1309 scb_command(dev, SCB_CUstart);
1310 outb(0,ioaddr+SIGNAL_CA);
1311
1312 {
1313 unsigned short boguscount=50,failcount=5;
1314 while (!scb_status(dev))
1315 {
1316 if (!--boguscount)
1317 {
1318 if (--failcount)
1319 {
1320 printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
1321 scb_wrcbl(dev, lp->tx_link);
1322 scb_command(dev, SCB_CUstart);
1323 outb(0,ioaddr+SIGNAL_CA);
1324 boguscount = 100;
1325 }
1326 else
1327 {
1328 printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
1329 eexp_hw_init586(dev);
1330 netif_wake_queue(dev);
1331 return;
1332 }
1333 }
1334 }
1335 }
1336}
1337
1338/*
1339 * Writes down the list of transmit buffers into card memory. Each
1340 * entry consists of an 82586 transmit command, followed by a jump
1341 * pointing to itself. When we want to transmit a packet, we write
1342 * the data into the appropriate transmit buffer and then modify the
1343 * preceding jump to point at the new transmit command. This means that
1344 * the 586 command unit is continuously active.
1345 */
1346
1347static void eexp_hw_txinit(struct net_device *dev)
1348{
1349 struct net_local *lp = netdev_priv(dev);
1350 unsigned short tx_block = TX_BUF_START;
1351 unsigned short curtbuf;
1352 unsigned short ioaddr = dev->base_addr;
1353
1354 for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
1355 {
1356 outw(tx_block, ioaddr + WRITE_PTR);
1357
1358 outw(0x0000, ioaddr + DATAPORT);
1359 outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
1360 outw(tx_block+0x08, ioaddr + DATAPORT);
1361 outw(tx_block+0x0e, ioaddr + DATAPORT);
1362
1363 outw(0x0000, ioaddr + DATAPORT);
1364 outw(0x0000, ioaddr + DATAPORT);
1365 outw(tx_block+0x08, ioaddr + DATAPORT);
1366
1367 outw(0x8000, ioaddr + DATAPORT);
1368 outw(-1, ioaddr + DATAPORT);
1369 outw(tx_block+0x16, ioaddr + DATAPORT);
1370 outw(0x0000, ioaddr + DATAPORT);
1371
1372 tx_block += TX_BUF_SIZE;
1373 }
1374 lp->tx_head = TX_BUF_START;
1375 lp->tx_reap = TX_BUF_START;
1376 lp->tx_tail = tx_block - TX_BUF_SIZE;
1377 lp->tx_link = lp->tx_tail + 0x08;
1378 lp->rx_buf_start = tx_block;
1379
1380}
1381
1382/*
1383 * Write the circular list of receive buffer descriptors to card memory.
1384 * The end of the list isn't marked, which means that the 82586 receive
1385 * unit will loop until buffers become available (this avoids it giving us
1386 * "out of resources" messages).
1387 */
1388
1389static void eexp_hw_rxinit(struct net_device *dev)
1390{
1391 struct net_local *lp = netdev_priv(dev);
1392 unsigned short rx_block = lp->rx_buf_start;
1393 unsigned short ioaddr = dev->base_addr;
1394
1395 lp->num_rx_bufs = 0;
1396 lp->rx_first = lp->rx_ptr = rx_block;
1397 do
1398 {
1399 lp->num_rx_bufs++;
1400
1401 outw(rx_block, ioaddr + WRITE_PTR);
1402
1403 outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
1404 outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
1405 outw(0xffff, ioaddr+DATAPORT);
1406
1407 outw(0x0000, ioaddr+DATAPORT);
1408 outw(0xdead, ioaddr+DATAPORT);
1409 outw(0xdead, ioaddr+DATAPORT);
1410 outw(0xdead, ioaddr+DATAPORT);
1411 outw(0xdead, ioaddr+DATAPORT);
1412 outw(0xdead, ioaddr+DATAPORT);
1413 outw(0xdead, ioaddr+DATAPORT);
1414
1415 outw(0x0000, ioaddr+DATAPORT);
1416 outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
1417 outw(rx_block + 0x20, ioaddr+DATAPORT);
1418 outw(0, ioaddr+DATAPORT);
1419 outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
1420
1421 lp->rx_last = rx_block;
1422 rx_block += RX_BUF_SIZE;
1423 } while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
1424
1425
1426 /* Make first Rx frame descriptor point to first Rx buffer
1427 descriptor */
1428 outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
1429 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
1430
1431 /* Close Rx frame descriptor ring */
1432 outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
1433 outw(lp->rx_first, ioaddr+DATAPORT);
6aa20a22 1434
1da177e4
LT		 1435 /* Close Rx buffer descriptor ring */
1436 outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
1437 outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
6aa20a22 1438
1da177e4
LT		 1439}
1440
1441/*
1442 * Un-reset the 586, and start the configuration sequence. We don't wait for
1443 * this to finish, but allow the interrupt handler to start the CU and RU for
1444 * us. We can't start the receive/transmission system up before we know that
1445 * the hardware is configured correctly.
1446 */
1447
1448static void eexp_hw_init586(struct net_device *dev)
1449{
1450 struct net_local *lp = netdev_priv(dev);
1451 unsigned short ioaddr = dev->base_addr;
1452 int i;
1453
1454#if NET_DEBUG > 6
1455 printk("%s: eexp_hw_init586()\n", dev->name);
1456#endif
1457
1458 lp->started = 0;
1459
1460 set_loopback(dev);
1461
1462 outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
1463
1464 /* Download the startup code */
1465 outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
1466 outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
1467 outw(0x0000, ioaddr + 0x8008);
1468 outw(0x0000, ioaddr + 0x800a);
1469 outw(0x0000, ioaddr + 0x800c);
1470 outw(0x0000, ioaddr + 0x800e);
1471
1472 for (i = 0; i < (sizeof(start_code)); i+=32) {
1473 int j;
1474 outw(i, ioaddr + SM_PTR);
1475 for (j = 0; j < 16; j+=2)
1476 outw(start_code[(i+j)/2],
1477 ioaddr+0x4000+j);
1478 for (j = 0; j < 16; j+=2)
1479 outw(start_code[(i+j+16)/2],
1480 ioaddr+0x8000+j);
1481 }
1482
1483 /* Do we want promiscuous mode or multicast? */
1484 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1485 i = inw(ioaddr+SHADOW(CONF_PROMISC));
6aa20a22 1486 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1da177e4
LT		 1487 ioaddr+SHADOW(CONF_PROMISC));
1488 lp->was_promisc = dev->flags & IFF_PROMISC;
1489#if 0
1490 eexp_setup_filter(dev);
1491#endif
1492
1493 /* Write our hardware address */
1494 outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
1495 outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
6aa20a22 1496 outw(((unsigned short *)dev->dev_addr)[1],
1da177e4
LT		 1497 ioaddr+SHADOW(CONF_HWADDR+2));
1498 outw(((unsigned short *)dev->dev_addr)[2],
1499 ioaddr+SHADOW(CONF_HWADDR+4));
1500
1501 eexp_hw_txinit(dev);
1502 eexp_hw_rxinit(dev);
1503
1504 outb(0,ioaddr+EEPROM_Ctrl);
1505 mdelay(5);
1506
1507 scb_command(dev, 0xf000);
1508 outb(0,ioaddr+SIGNAL_CA);
1509
1510 outw(0, ioaddr+SM_PTR);
1511
1512 {
1513 unsigned short rboguscount=50,rfailcount=5;
1514 while (inw(ioaddr+0x4000))
1515 {
1516 if (!--rboguscount)
1517 {
1518 printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
1519 dev->name);
1520 scb_command(dev, 0);
1521 outb(0,ioaddr+SIGNAL_CA);
1522 rboguscount = 100;
1523 if (!--rfailcount)
1524 {
1525 printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
1526 dev->name);
1527 return;
1528 }
1529 }
1530 }
1531 }
1532
1533 scb_wrcbl(dev, CONF_LINK);
1534 scb_command(dev, 0xf000|SCB_CUstart);
1535 outb(0,ioaddr+SIGNAL_CA);
1536
1537 {
1538 unsigned short iboguscount=50,ifailcount=5;
1539 while (!scb_status(dev))
1540 {
1541 if (!--iboguscount)
1542 {
1543 if (--ifailcount)
1544 {
1545 printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
1546 dev->name, scb_status(dev), scb_rdcmd(dev));
1547 scb_wrcbl(dev, CONF_LINK);
1548 scb_command(dev, 0xf000|SCB_CUstart);
1549 outb(0,ioaddr+SIGNAL_CA);
1550 iboguscount = 100;
1551 }
1552 else
1553 {
1554 printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
1555 return;
1556 }
1557 }
1558 }
1559 }
1560
1561 clear_loopback(dev);
1562 outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
1563
1564 lp->init_time = jiffies;
1565#if NET_DEBUG > 6
1566 printk("%s: leaving eexp_hw_init586()\n", dev->name);
1567#endif
1568 return;
1569}
1570
1571static void eexp_setup_filter(struct net_device *dev)
1572{
1573 struct dev_mc_list *dmi = dev->mc_list;
1574 unsigned short ioaddr = dev->base_addr;
1575 int count = dev->mc_count;
1576 int i;
1577 if (count > 8) {
1578 printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
1579 dev->name, count);
1580 count = 8;
1581 }
6aa20a22 1582
1da177e4
LT		 1583 outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
1584 outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
1585 for (i = 0; i < count; i++) {
1586 unsigned short *data = (unsigned short *)dmi->dmi_addr;
1587 if (!dmi) {
1588 printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
1589 break;
1590 }
1591 if (dmi->dmi_addrlen != ETH_ALEN) {
1592 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
1593 continue;
1594 }
1595 outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
1596 outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
1597 outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
1598 outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
1599 outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
1600 outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
1601 }
1602}
1603
1604/*
1605 * Set or clear the multicast filter for this adaptor.
1606 */
1607static void
1608eexp_set_multicast(struct net_device *dev)
1609{
1610 unsigned short ioaddr = dev->base_addr;
1611 struct net_local *lp = netdev_priv(dev);
1612 int kick = 0, i;
1613 if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
1614 outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
1615 i = inw(ioaddr+SHADOW(CONF_PROMISC));
1616 outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
1617 ioaddr+SHADOW(CONF_PROMISC));
1618 lp->was_promisc = dev->flags & IFF_PROMISC;
1619 kick = 1;
1620 }
1621 if (!(dev->flags & IFF_PROMISC)) {
1622 eexp_setup_filter(dev);
1623 if (lp->old_mc_count != dev->mc_count) {
1624 kick = 1;
1625 lp->old_mc_count = dev->mc_count;
1626 }
1627 }
1628 if (kick) {
1629 unsigned long oj;
1630 scb_command(dev, SCB_CUsuspend);
1631 outb(0, ioaddr+SIGNAL_CA);
1632 outb(0, ioaddr+SIGNAL_CA);
1633#if 0
1634 printk("%s: waiting for CU to go suspended\n", dev->name);
1635#endif
1636 oj = jiffies;
1637 while ((SCB_CUstat(scb_status(dev)) == 2) &&
1c0d6dcf 1638 (time_before(jiffies, oj + 2000)));
1da177e4
LT		 1639 if (SCB_CUstat(scb_status(dev)) == 2)
1640 printk("%s: warning, CU didn't stop\n", dev->name);
1641 lp->started &= ~(STARTED_CU);
1642 scb_wrcbl(dev, CONF_LINK);
1643 scb_command(dev, SCB_CUstart);
1644 outb(0, ioaddr+SIGNAL_CA);
1645 }
1646}
1647
1648
1649/*
1650 * MODULE stuff
1651 */
1652
1653#ifdef MODULE
1654
1655#define EEXP_MAX_CARDS 4 /* max number of cards to support */
1656
1657static struct net_device *dev_eexp[EEXP_MAX_CARDS];
1658static int irq[EEXP_MAX_CARDS];
1659static int io[EEXP_MAX_CARDS];
1660
1661module_param_array(io, int, NULL, 0);
1662module_param_array(irq, int, NULL, 0);
1663MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
1664MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
1665MODULE_LICENSE("GPL");
1666
1667
1668/* Ideally the user would give us io=, irq= for every card. If any parameters
1669 * are specified, we verify and then use them. If no parameters are given, we
1670 * autoprobe for one card only.
1671 */
b1176b95 1672int __init init_module(void)
1da177e4
LT		 1673{
1674 struct net_device *dev;
1675 int this_dev, found = 0;
1676
1677 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1678 dev = alloc_etherdev(sizeof(struct net_local));
1679 dev->irq = irq[this_dev];
1680 dev->base_addr = io[this_dev];
1681 if (io[this_dev] == 0) {
1682 if (this_dev)
1683 break;
1684 printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
1685 }
b1fc5505 1686 if (do_express_probe(dev) == 0) {
1da177e4
LT		 1687 dev_eexp[this_dev] = dev;
1688 found++;
1689 continue;
1690 }
1691 printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
1692 free_netdev(dev);
1693 break;
1694 }
1695 if (found)
1696 return 0;
1697 return -ENXIO;
1698}
1699
afc8eb46 1700void __exit cleanup_module(void)
1da177e4
LT		 1701{
1702 int this_dev;
1703
1704 for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
1705 struct net_device *dev = dev_eexp[this_dev];
1706 if (dev) {
1707 unregister_netdev(dev);
1708 free_netdev(dev);
1709 }
1710 }
1711}
1712#endif
1713
1714/*
1715 * Local Variables:
1716 * c-file-style: "linux"
1717 * tab-width: 8
1718 * End:
1719 */
kernel source for telekom puls (alcatel/mediatek)