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diff --git a/drivers/net/3c505.c b/drivers/net/3c505.c
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1/*
2 * Linux Ethernet device driver for the 3Com Etherlink Plus (3C505)
3 * By Craig Southeren, Juha Laiho and Philip Blundell
4 *
5 * 3c505.c This module implements an interface to the 3Com
6 * Etherlink Plus (3c505) Ethernet card. Linux device
7 * driver interface reverse engineered from the Linux 3C509
8 * device drivers. Some 3C505 information gleaned from
9 * the Crynwr packet driver. Still this driver would not
10 * be here without 3C505 technical reference provided by
11 * 3Com.
12 *
13 * $Id: 3c505.c,v 1.10 1996/04/16 13:06:27 phil Exp $
14 *
15 * Authors: Linux 3c505 device driver by
16 * Craig Southeren, <craigs@ineluki.apana.org.au>
17 * Final debugging by
18 * Andrew Tridgell, <tridge@nimbus.anu.edu.au>
19 * Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by
20 * Juha Laiho, <jlaiho@ichaos.nullnet.fi>
21 * Linux 3C509 driver by
22 * Donald Becker, <becker@super.org>
23 * (Now at <becker@scyld.com>)
24 * Crynwr packet driver by
25 * Krishnan Gopalan and Gregg Stefancik,
26 * Clemson University Engineering Computer Operations.
27 * Portions of the code have been adapted from the 3c505
28 * driver for NCSA Telnet by Bruce Orchard and later
29 * modified by Warren Van Houten and krus@diku.dk.
30 * 3C505 technical information provided by
31 * Terry Murphy, of 3Com Network Adapter Division
32 * Linux 1.3.0 changes by
33 * Alan Cox <Alan.Cox@linux.org>
34 * More debugging, DMA support, currently maintained by
35 * Philip Blundell <philb@gnu.org>
36 * Multicard/soft configurable dma channel/rev 2 hardware support
37 * by Christopher Collins <ccollins@pcug.org.au>
38 * Ethtool support (jgarzik), 11/17/2001
39 */
40
41#define DRV_NAME "3c505"
42#define DRV_VERSION "1.10a"
43
44
45/* Theory of operation:
46 *
47 * The 3c505 is quite an intelligent board. All communication with it is done
48 * by means of Primary Command Blocks (PCBs); these are transferred using PIO
49 * through the command register. The card has 256k of on-board RAM, which is
50 * used to buffer received packets. It might seem at first that more buffers
51 * are better, but in fact this isn't true. From my tests, it seems that
52 * more than about 10 buffers are unnecessary, and there is a noticeable
53 * performance hit in having more active on the card. So the majority of the
54 * card's memory isn't, in fact, used. Sadly, the card only has one transmit
55 * buffer and, short of loading our own firmware into it (which is what some
56 * drivers resort to) there's nothing we can do about this.
57 *
58 * We keep up to 4 "receive packet" commands active on the board at a time.
59 * When a packet comes in, so long as there is a receive command active, the
60 * board will send us a "packet received" PCB and then add the data for that
61 * packet to the DMA queue. If a DMA transfer is not already in progress, we
62 * set one up to start uploading the data. We have to maintain a list of
63 * backlogged receive packets, because the card may decide to tell us about
64 * a newly-arrived packet at any time, and we may not be able to start a DMA
65 * transfer immediately (ie one may already be going on). We can't NAK the
66 * PCB, because then it would throw the packet away.
67 *
68 * Trying to send a PCB to the card at the wrong moment seems to have bad
69 * effects. If we send it a transmit PCB while a receive DMA is happening,
70 * it will just NAK the PCB and so we will have wasted our time. Worse, it
71 * sometimes seems to interrupt the transfer. The majority of the low-level
72 * code is protected by one huge semaphore -- "busy" -- which is set whenever
73 * it probably isn't safe to do anything to the card. The receive routine
74 * must gain a lock on "busy" before it can start a DMA transfer, and the
75 * transmit routine must gain a lock before it sends the first PCB to the card.
76 * The send_pcb() routine also has an internal semaphore to protect it against
77 * being re-entered (which would be disastrous) -- this is needed because
78 * several things can happen asynchronously (re-priming the receiver and
79 * asking the card for statistics, for example). send_pcb() will also refuse
80 * to talk to the card at all if a DMA upload is happening. The higher-level
81 * networking code will reschedule a later retry if some part of the driver
82 * is blocked. In practice, this doesn't seem to happen very often.
83 */
84
85/* This driver may now work with revision 2.x hardware, since all the read
86 * operations on the HCR have been removed (we now keep our own softcopy).
87 * But I don't have an old card to test it on.
88 *
89 * This has had the bad effect that the autoprobe routine is now a bit
90 * less friendly to other devices. However, it was never very good.
91 * before, so I doubt it will hurt anybody.
92 */
93
94/* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly
95 * to make it more reliable, and secondly to add DMA mode. Many things could
96 * probably be done better; the concurrency protection is particularly awful.
97 */
98
99#include <linux/module.h>
100#include <linux/kernel.h>
101#include <linux/string.h>
102#include <linux/interrupt.h>
103#include <linux/errno.h>
104#include <linux/in.h>
105#include <linux/slab.h>
106#include <linux/ioport.h>
107#include <linux/spinlock.h>
108#include <linux/ethtool.h>
109#include <linux/delay.h>
110#include <linux/bitops.h>
111
112#include <asm/uaccess.h>
113#include <asm/io.h>
114#include <asm/dma.h>
115
116#include <linux/netdevice.h>
117#include <linux/etherdevice.h>
118#include <linux/skbuff.h>
119#include <linux/init.h>
120
121#include "3c505.h"
122
123/*********************************************************
124 *
125 * define debug messages here as common strings to reduce space
126 *
127 *********************************************************/
128
129static const char filename[] = __FILE__;
130
131static const char timeout_msg[] = "*** timeout at %s:%s (line %d) ***\n";
132#define TIMEOUT_MSG(lineno) \
133 printk(timeout_msg, filename,__FUNCTION__,(lineno))
134
135static const char invalid_pcb_msg[] =
136"*** invalid pcb length %d at %s:%s (line %d) ***\n";
137#define INVALID_PCB_MSG(len) \
138 printk(invalid_pcb_msg, (len),filename,__FUNCTION__,__LINE__)
139
140static char search_msg[] __initdata = KERN_INFO "%s: Looking for 3c505 adapter at address %#x...";
141
142static char stilllooking_msg[] __initdata = "still looking...";
143
144static char found_msg[] __initdata = "found.\n";
145
146static char notfound_msg[] __initdata = "not found (reason = %d)\n";
147
148static char couldnot_msg[] __initdata = KERN_INFO "%s: 3c505 not found\n";
149
150/*********************************************************
151 *
152 * various other debug stuff
153 *
154 *********************************************************/
155
156#ifdef ELP_DEBUG
157static int elp_debug = ELP_DEBUG;
158#else
159static int elp_debug;
160#endif
161#define debug elp_debug
162
163/*
164 * 0 = no messages (well, some)
165 * 1 = messages when high level commands performed
166 * 2 = messages when low level commands performed
167 * 3 = messages when interrupts received
168 */
169
170/*****************************************************************
171 *
172 * useful macros
173 *
174 *****************************************************************/
175
176#ifndef TRUE
177#define TRUE 1
178#endif
179
180#ifndef FALSE
181#define FALSE 0
182#endif
183
184
185/*****************************************************************
186 *
187 * List of I/O-addresses we try to auto-sense
188 * Last element MUST BE 0!
189 *****************************************************************/
190
191static int addr_list[] __initdata = {0x300, 0x280, 0x310, 0};
192
193/* Dma Memory related stuff */
194
195static unsigned long dma_mem_alloc(int size)
196{
197 int order = get_order(size);
198 return __get_dma_pages(GFP_KERNEL, order);
199}
200
201
202/*****************************************************************
203 *
204 * Functions for I/O (note the inline !)
205 *
206 *****************************************************************/
207
208static inline unsigned char inb_status(unsigned int base_addr)
209{
210 return inb(base_addr + PORT_STATUS);
211}
212
213static inline int inb_command(unsigned int base_addr)
214{
215 return inb(base_addr + PORT_COMMAND);
216}
217
218static inline void outb_control(unsigned char val, struct net_device *dev)
219{
220 outb(val, dev->base_addr + PORT_CONTROL);
221 ((elp_device *)(dev->priv))->hcr_val = val;
222}
223
224#define HCR_VAL(x) (((elp_device *)((x)->priv))->hcr_val)
225
226static inline void outb_command(unsigned char val, unsigned int base_addr)
227{
228 outb(val, base_addr + PORT_COMMAND);
229}
230
231static inline unsigned int backlog_next(unsigned int n)
232{
233 return (n + 1) % BACKLOG_SIZE;
234}
235
236/*****************************************************************
237 *
238 * useful functions for accessing the adapter
239 *
240 *****************************************************************/
241
242/*
243 * use this routine when accessing the ASF bits as they are
244 * changed asynchronously by the adapter
245 */
246
247/* get adapter PCB status */
248#define GET_ASF(addr) \
249 (get_status(addr)&ASF_PCB_MASK)
250
251static inline int get_status(unsigned int base_addr)
252{
253 unsigned long timeout = jiffies + 10*HZ/100;
254 register int stat1;
255 do {
256 stat1 = inb_status(base_addr);
257 } while (stat1 != inb_status(base_addr) && time_before(jiffies, timeout));
258 if (time_after_eq(jiffies, timeout))
259 TIMEOUT_MSG(__LINE__);
260 return stat1;
261}
262
263static inline void set_hsf(struct net_device *dev, int hsf)
264{
265 elp_device *adapter = dev->priv;
266 unsigned long flags;
267
268 spin_lock_irqsave(&adapter->lock, flags);
269 outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev);
270 spin_unlock_irqrestore(&adapter->lock, flags);
271}
272
273static int start_receive(struct net_device *, pcb_struct *);
274
275inline static void adapter_reset(struct net_device *dev)
276{
277 unsigned long timeout;
278 elp_device *adapter = dev->priv;
279 unsigned char orig_hcr = adapter->hcr_val;
280
281 outb_control(0, dev);
282
283 if (inb_status(dev->base_addr) & ACRF) {
284 do {
285 inb_command(dev->base_addr);
286 timeout = jiffies + 2*HZ/100;
287 while (time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF));
288 } while (inb_status(dev->base_addr) & ACRF);
289 set_hsf(dev, HSF_PCB_NAK);
290 }
291 outb_control(adapter->hcr_val | ATTN | DIR, dev);
292 mdelay(10);
293 outb_control(adapter->hcr_val & ~ATTN, dev);
294 mdelay(10);
295 outb_control(adapter->hcr_val | FLSH, dev);
296 mdelay(10);
297 outb_control(adapter->hcr_val & ~FLSH, dev);
298 mdelay(10);
299
300 outb_control(orig_hcr, dev);
301 if (!start_receive(dev, &adapter->tx_pcb))
302 printk(KERN_ERR "%s: start receive command failed \n", dev->name);
303}
304
305/* Check to make sure that a DMA transfer hasn't timed out. This should
306 * never happen in theory, but seems to occur occasionally if the card gets
307 * prodded at the wrong time.
308 */
309static inline void check_3c505_dma(struct net_device *dev)
310{
311 elp_device *adapter = dev->priv;
312 if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) {
313 unsigned long flags, f;
314 printk(KERN_ERR "%s: DMA %s timed out, %d bytes left\n", dev->name, adapter->current_dma.direction ? "download" : "upload", get_dma_residue(dev->dma));
315 spin_lock_irqsave(&adapter->lock, flags);
316 adapter->dmaing = 0;
317 adapter->busy = 0;
318
319 f=claim_dma_lock();
320 disable_dma(dev->dma);
321 release_dma_lock(f);
322
323 if (adapter->rx_active)
324 adapter->rx_active--;
325 outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
326 spin_unlock_irqrestore(&adapter->lock, flags);
327 }
328}
329
330/* Primitive functions used by send_pcb() */
331static inline unsigned int send_pcb_slow(unsigned int base_addr, unsigned char byte)
332{
333 unsigned long timeout;
334 outb_command(byte, base_addr);
335 for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
336 if (inb_status(base_addr) & HCRE)
337 return FALSE;
338 }
339 printk(KERN_WARNING "3c505: send_pcb_slow timed out\n");
340 return TRUE;
341}
342
343static inline unsigned int send_pcb_fast(unsigned int base_addr, unsigned char byte)
344{
345 unsigned int timeout;
346 outb_command(byte, base_addr);
347 for (timeout = 0; timeout < 40000; timeout++) {
348 if (inb_status(base_addr) & HCRE)
349 return FALSE;
350 }
351 printk(KERN_WARNING "3c505: send_pcb_fast timed out\n");
352 return TRUE;
353}
354
355/* Check to see if the receiver needs restarting, and kick it if so */
356static inline void prime_rx(struct net_device *dev)
357{
358 elp_device *adapter = dev->priv;
359 while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) {
360 if (!start_receive(dev, &adapter->itx_pcb))
361 break;
362 }
363}
364
365/*****************************************************************
366 *
367 * send_pcb
368 * Send a PCB to the adapter.
369 *
370 * output byte to command reg --<--+
371 * wait until HCRE is non zero |
372 * loop until all bytes sent -->--+
373 * set HSF1 and HSF2 to 1
374 * output pcb length
375 * wait until ASF give ACK or NAK
376 * set HSF1 and HSF2 to 0
377 *
378 *****************************************************************/
379
380/* This can be quite slow -- the adapter is allowed to take up to 40ms
381 * to respond to the initial interrupt.
382 *
383 * We run initially with interrupts turned on, but with a semaphore set
384 * so that nobody tries to re-enter this code. Once the first byte has
385 * gone through, we turn interrupts off and then send the others (the
386 * timeout is reduced to 500us).
387 */
388
389static int send_pcb(struct net_device *dev, pcb_struct * pcb)
390{
391 int i;
392 unsigned long timeout;
393 elp_device *adapter = dev->priv;
394 unsigned long flags;
395
396 check_3c505_dma(dev);
397
398 if (adapter->dmaing && adapter->current_dma.direction == 0)
399 return FALSE;
400
401 /* Avoid contention */
402 if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) {
403 if (elp_debug >= 3) {
404 printk(KERN_DEBUG "%s: send_pcb entered while threaded\n", dev->name);
405 }
406 return FALSE;
407 }
408 /*
409 * load each byte into the command register and
410 * wait for the HCRE bit to indicate the adapter
411 * had read the byte
412 */
413 set_hsf(dev, 0);
414
415 if (send_pcb_slow(dev->base_addr, pcb->command))
416 goto abort;
417
418 spin_lock_irqsave(&adapter->lock, flags);
419
420 if (send_pcb_fast(dev->base_addr, pcb->length))
421 goto sti_abort;
422
423 for (i = 0; i < pcb->length; i++) {
424 if (send_pcb_fast(dev->base_addr, pcb->data.raw[i]))
425 goto sti_abort;
426 }
427
428 outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */
429 outb_command(2 + pcb->length, dev->base_addr);
430
431 /* now wait for the acknowledgement */
432 spin_unlock_irqrestore(&adapter->lock, flags);
433
434 for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
435 switch (GET_ASF(dev->base_addr)) {
436 case ASF_PCB_ACK:
437 adapter->send_pcb_semaphore = 0;
438 return TRUE;
439
440 case ASF_PCB_NAK:
441#ifdef ELP_DEBUG
442 printk(KERN_DEBUG "%s: send_pcb got NAK\n", dev->name);
443#endif
444 goto abort;
445 }
446 }
447
448 if (elp_debug >= 1)
449 printk(KERN_DEBUG "%s: timeout waiting for PCB acknowledge (status %02x)\n", dev->name, inb_status(dev->base_addr));
450 goto abort;
451
452 sti_abort:
453 spin_unlock_irqrestore(&adapter->lock, flags);
454 abort:
455 adapter->send_pcb_semaphore = 0;
456 return FALSE;
457}
458
459
460/*****************************************************************
461 *
462 * receive_pcb
463 * Read a PCB from the adapter
464 *
465 * wait for ACRF to be non-zero ---<---+
466 * input a byte |
467 * if ASF1 and ASF2 were not both one |
468 * before byte was read, loop --->---+
469 * set HSF1 and HSF2 for ack
470 *
471 *****************************************************************/
472
473static int receive_pcb(struct net_device *dev, pcb_struct * pcb)
474{
475 int i, j;
476 int total_length;
477 int stat;
478 unsigned long timeout;
479 unsigned long flags;
480
481 elp_device *adapter = dev->priv;
482
483 set_hsf(dev, 0);
484
485 /* get the command code */
486 timeout = jiffies + 2*HZ/100;
487 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
488 if (time_after_eq(jiffies, timeout)) {
489 TIMEOUT_MSG(__LINE__);
490 return FALSE;
491 }
492 pcb->command = inb_command(dev->base_addr);
493
494 /* read the data length */
495 timeout = jiffies + 3*HZ/100;
496 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
497 if (time_after_eq(jiffies, timeout)) {
498 TIMEOUT_MSG(__LINE__);
499 printk(KERN_INFO "%s: status %02x\n", dev->name, stat);
500 return FALSE;
501 }
502 pcb->length = inb_command(dev->base_addr);
503
504 if (pcb->length > MAX_PCB_DATA) {
505 INVALID_PCB_MSG(pcb->length);
506 adapter_reset(dev);
507 return FALSE;
508 }
509 /* read the data */
510 spin_lock_irqsave(&adapter->lock, flags);
511 i = 0;
512 do {
513 j = 0;
514 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && j++ < 20000);
515 pcb->data.raw[i++] = inb_command(dev->base_addr);
516 if (i > MAX_PCB_DATA)
517 INVALID_PCB_MSG(i);
518 } while ((stat & ASF_PCB_MASK) != ASF_PCB_END && j < 20000);
519 spin_unlock_irqrestore(&adapter->lock, flags);
520 if (j >= 20000) {
521 TIMEOUT_MSG(__LINE__);
522 return FALSE;
523 }
524 /* woops, the last "data" byte was really the length! */
525 total_length = pcb->data.raw[--i];
526
527 /* safety check total length vs data length */
528 if (total_length != (pcb->length + 2)) {
529 if (elp_debug >= 2)
530 printk(KERN_WARNING "%s: mangled PCB received\n", dev->name);
531 set_hsf(dev, HSF_PCB_NAK);
532 return FALSE;
533 }
534
535 if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) {
536 if (test_and_set_bit(0, (void *) &adapter->busy)) {
537 if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) {
538 set_hsf(dev, HSF_PCB_NAK);
539 printk(KERN_WARNING "%s: PCB rejected, transfer in progress and backlog full\n", dev->name);
540 pcb->command = 0;
541 return TRUE;
542 } else {
543 pcb->command = 0xff;
544 }
545 }
546 }
547 set_hsf(dev, HSF_PCB_ACK);
548 return TRUE;
549}
550
551/******************************************************
552 *
553 * queue a receive command on the adapter so we will get an
554 * interrupt when a packet is received.
555 *
556 ******************************************************/
557
558static int start_receive(struct net_device *dev, pcb_struct * tx_pcb)
559{
560 int status;
561 elp_device *adapter = dev->priv;
562
563 if (elp_debug >= 3)
564 printk(KERN_DEBUG "%s: restarting receiver\n", dev->name);
565 tx_pcb->command = CMD_RECEIVE_PACKET;
566 tx_pcb->length = sizeof(struct Rcv_pkt);
567 tx_pcb->data.rcv_pkt.buf_seg
568 = tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */
569 tx_pcb->data.rcv_pkt.buf_len = 1600;
570 tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */
571 status = send_pcb(dev, tx_pcb);
572 if (status)
573 adapter->rx_active++;
574 return status;
575}
576
577/******************************************************
578 *
579 * extract a packet from the adapter
580 * this routine is only called from within the interrupt
581 * service routine, so no cli/sti calls are needed
582 * note that the length is always assumed to be even
583 *
584 ******************************************************/
585
586static void receive_packet(struct net_device *dev, int len)
587{
588 int rlen;
589 elp_device *adapter = dev->priv;
590 void *target;
591 struct sk_buff *skb;
592 unsigned long flags;
593
594 rlen = (len + 1) & ~1;
595 skb = dev_alloc_skb(rlen + 2);
596
597 if (!skb) {
598 printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name);
599 target = adapter->dma_buffer;
600 adapter->current_dma.target = NULL;
601 /* FIXME: stats */
602 return;
603 }
604
605 skb_reserve(skb, 2);
606 target = skb_put(skb, rlen);
607 if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) {
608 adapter->current_dma.target = target;
609 target = adapter->dma_buffer;
610 } else {
611 adapter->current_dma.target = NULL;
612 }
613
614 /* if this happens, we die */
615 if (test_and_set_bit(0, (void *) &adapter->dmaing))
616 printk(KERN_ERR "%s: rx blocked, DMA in progress, dir %d\n", dev->name, adapter->current_dma.direction);
617
618 skb->dev = dev;
619 adapter->current_dma.direction = 0;
620 adapter->current_dma.length = rlen;
621 adapter->current_dma.skb = skb;
622 adapter->current_dma.start_time = jiffies;
623
624 outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev);
625
626 flags=claim_dma_lock();
627 disable_dma(dev->dma);
628 clear_dma_ff(dev->dma);
629 set_dma_mode(dev->dma, 0x04); /* dma read */
630 set_dma_addr(dev->dma, isa_virt_to_bus(target));
631 set_dma_count(dev->dma, rlen);
632 enable_dma(dev->dma);
633 release_dma_lock(flags);
634
635 if (elp_debug >= 3) {
636 printk(KERN_DEBUG "%s: rx DMA transfer started\n", dev->name);
637 }
638
639 if (adapter->rx_active)
640 adapter->rx_active--;
641
642 if (!adapter->busy)
643 printk(KERN_WARNING "%s: receive_packet called, busy not set.\n", dev->name);
644}
645
646/******************************************************
647 *
648 * interrupt handler
649 *
650 ******************************************************/
651
652static irqreturn_t elp_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
653{
654 int len;
655 int dlen;
656 int icount = 0;
657 struct net_device *dev;
658 elp_device *adapter;
659 unsigned long timeout;
660
661 dev = dev_id;
662 adapter = (elp_device *) dev->priv;
663
664 spin_lock(&adapter->lock);
665
666 do {
667 /*
668 * has a DMA transfer finished?
669 */
670 if (inb_status(dev->base_addr) & DONE) {
671 if (!adapter->dmaing) {
672 printk(KERN_WARNING "%s: phantom DMA completed\n", dev->name);
673 }
674 if (elp_debug >= 3) {
675 printk(KERN_DEBUG "%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ? "tx" : "rx", inb_status(dev->base_addr));
676 }
677
678 outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
679 if (adapter->current_dma.direction) {
680 dev_kfree_skb_irq(adapter->current_dma.skb);
681 } else {
682 struct sk_buff *skb = adapter->current_dma.skb;
683 if (skb) {
684 if (adapter->current_dma.target) {
685 /* have already done the skb_put() */
686 memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length);
687 }
688 skb->protocol = eth_type_trans(skb,dev);
689 adapter->stats.rx_bytes += skb->len;
690 netif_rx(skb);
691 dev->last_rx = jiffies;
692 }
693 }
694 adapter->dmaing = 0;
695 if (adapter->rx_backlog.in != adapter->rx_backlog.out) {
696 int t = adapter->rx_backlog.length[adapter->rx_backlog.out];
697 adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out);
698 if (elp_debug >= 2)
699 printk(KERN_DEBUG "%s: receiving backlogged packet (%d)\n", dev->name, t);
700 receive_packet(dev, t);
701 } else {
702 adapter->busy = 0;
703 }
704 } else {
705 /* has one timed out? */
706 check_3c505_dma(dev);
707 }
708
709 /*
710 * receive a PCB from the adapter
711 */
712 timeout = jiffies + 3*HZ/100;
713 while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) {
714 if (receive_pcb(dev, &adapter->irx_pcb)) {
715 switch (adapter->irx_pcb.command)
716 {
717 case 0:
718 break;
719 /*
720 * received a packet - this must be handled fast
721 */
722 case 0xff:
723 case CMD_RECEIVE_PACKET_COMPLETE:
724 /* if the device isn't open, don't pass packets up the stack */
725 if (!netif_running(dev))
726 break;
727 len = adapter->irx_pcb.data.rcv_resp.pkt_len;
728 dlen = adapter->irx_pcb.data.rcv_resp.buf_len;
729 if (adapter->irx_pcb.data.rcv_resp.timeout != 0) {
730 printk(KERN_ERR "%s: interrupt - packet not received correctly\n", dev->name);
731 } else {
732 if (elp_debug >= 3) {
733 printk(KERN_DEBUG "%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen);
734 }
735 if (adapter->irx_pcb.command == 0xff) {
736 if (elp_debug >= 2)
737 printk(KERN_DEBUG "%s: adding packet to backlog (len = %d)\n", dev->name, dlen);
738 adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen;
739 adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in);
740 } else {
741 receive_packet(dev, dlen);
742 }
743 if (elp_debug >= 3)
744 printk(KERN_DEBUG "%s: packet received\n", dev->name);
745 }
746 break;
747
748 /*
749 * 82586 configured correctly
750 */
751 case CMD_CONFIGURE_82586_RESPONSE:
752 adapter->got[CMD_CONFIGURE_82586] = 1;
753 if (elp_debug >= 3)
754 printk(KERN_DEBUG "%s: interrupt - configure response received\n", dev->name);
755 break;
756
757 /*
758 * Adapter memory configuration
759 */
760 case CMD_CONFIGURE_ADAPTER_RESPONSE:
761 adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1;
762 if (elp_debug >= 3)
763 printk(KERN_DEBUG "%s: Adapter memory configuration %s.\n", dev->name,
764 adapter->irx_pcb.data.failed ? "failed" : "succeeded");
765 break;
766
767 /*
768 * Multicast list loading
769 */
770 case CMD_LOAD_MULTICAST_RESPONSE:
771 adapter->got[CMD_LOAD_MULTICAST_LIST] = 1;
772 if (elp_debug >= 3)
773 printk(KERN_DEBUG "%s: Multicast address list loading %s.\n", dev->name,
774 adapter->irx_pcb.data.failed ? "failed" : "succeeded");
775 break;
776
777 /*
778 * Station address setting
779 */
780 case CMD_SET_ADDRESS_RESPONSE:
781 adapter->got[CMD_SET_STATION_ADDRESS] = 1;
782 if (elp_debug >= 3)
783 printk(KERN_DEBUG "%s: Ethernet address setting %s.\n", dev->name,
784 adapter->irx_pcb.data.failed ? "failed" : "succeeded");
785 break;
786
787
788 /*
789 * received board statistics
790 */
791 case CMD_NETWORK_STATISTICS_RESPONSE:
792 adapter->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv;
793 adapter->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit;
794 adapter->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC;
795 adapter->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align;
796 adapter->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun;
797 adapter->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res;
798 adapter->got[CMD_NETWORK_STATISTICS] = 1;
799 if (elp_debug >= 3)
800 printk(KERN_DEBUG "%s: interrupt - statistics response received\n", dev->name);
801 break;
802
803 /*
804 * sent a packet
805 */
806 case CMD_TRANSMIT_PACKET_COMPLETE:
807 if (elp_debug >= 3)
808 printk(KERN_DEBUG "%s: interrupt - packet sent\n", dev->name);
809 if (!netif_running(dev))
810 break;
811 switch (adapter->irx_pcb.data.xmit_resp.c_stat) {
812 case 0xffff:
813 adapter->stats.tx_aborted_errors++;
814 printk(KERN_INFO "%s: transmit timed out, network cable problem?\n", dev->name);
815 break;
816 case 0xfffe:
817 adapter->stats.tx_fifo_errors++;
818 printk(KERN_INFO "%s: transmit timed out, FIFO underrun\n", dev->name);
819 break;
820 }
821 netif_wake_queue(dev);
822 break;
823
824 /*
825 * some unknown PCB
826 */
827 default:
828 printk(KERN_DEBUG "%s: unknown PCB received - %2.2x\n", dev->name, adapter->irx_pcb.command);
829 break;
830 }
831 } else {
832 printk(KERN_WARNING "%s: failed to read PCB on interrupt\n", dev->name);
833 adapter_reset(dev);
834 }
835 }
836
837 } while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE)));
838
839 prime_rx(dev);
840
841 /*
842 * indicate no longer in interrupt routine
843 */
844 spin_unlock(&adapter->lock);
845 return IRQ_HANDLED;
846}
847
848
849/******************************************************
850 *
851 * open the board
852 *
853 ******************************************************/
854
855static int elp_open(struct net_device *dev)
856{
857 elp_device *adapter;
858 int retval;
859
860 adapter = dev->priv;
861
862 if (elp_debug >= 3)
863 printk(KERN_DEBUG "%s: request to open device\n", dev->name);
864
865 /*
866 * make sure we actually found the device
867 */
868 if (adapter == NULL) {
869 printk(KERN_ERR "%s: Opening a non-existent physical device\n", dev->name);
870 return -EAGAIN;
871 }
872 /*
873 * disable interrupts on the board
874 */
875 outb_control(0, dev);
876
877 /*
878 * clear any pending interrupts
879 */
880 inb_command(dev->base_addr);
881 adapter_reset(dev);
882
883 /*
884 * no receive PCBs active
885 */
886 adapter->rx_active = 0;
887
888 adapter->busy = 0;
889 adapter->send_pcb_semaphore = 0;
890 adapter->rx_backlog.in = 0;
891 adapter->rx_backlog.out = 0;
892
893 spin_lock_init(&adapter->lock);
894
895 /*
896 * install our interrupt service routine
897 */
898 if ((retval = request_irq(dev->irq, &elp_interrupt, 0, dev->name, dev))) {
899 printk(KERN_ERR "%s: could not allocate IRQ%d\n", dev->name, dev->irq);
900 return retval;
901 }
902 if ((retval = request_dma(dev->dma, dev->name))) {
903 free_irq(dev->irq, dev);
904 printk(KERN_ERR "%s: could not allocate DMA%d channel\n", dev->name, dev->dma);
905 return retval;
906 }
907 adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE);
908 if (!adapter->dma_buffer) {
909 printk(KERN_ERR "%s: could not allocate DMA buffer\n", dev->name);
910 free_dma(dev->dma);
911 free_irq(dev->irq, dev);
912 return -ENOMEM;
913 }
914 adapter->dmaing = 0;
915
916 /*
917 * enable interrupts on the board
918 */
919 outb_control(CMDE, dev);
920
921 /*
922 * configure adapter memory: we need 10 multicast addresses, default==0
923 */
924 if (elp_debug >= 3)
925 printk(KERN_DEBUG "%s: sending 3c505 memory configuration command\n", dev->name);
926 adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
927 adapter->tx_pcb.data.memconf.cmd_q = 10;
928 adapter->tx_pcb.data.memconf.rcv_q = 20;
929 adapter->tx_pcb.data.memconf.mcast = 10;
930 adapter->tx_pcb.data.memconf.frame = 20;
931 adapter->tx_pcb.data.memconf.rcv_b = 20;
932 adapter->tx_pcb.data.memconf.progs = 0;
933 adapter->tx_pcb.length = sizeof(struct Memconf);
934 adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0;
935 if (!send_pcb(dev, &adapter->tx_pcb))
936 printk(KERN_ERR "%s: couldn't send memory configuration command\n", dev->name);
937 else {
938 unsigned long timeout = jiffies + TIMEOUT;
939 while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout));
940 if (time_after_eq(jiffies, timeout))
941 TIMEOUT_MSG(__LINE__);
942 }
943
944
945 /*
946 * configure adapter to receive broadcast messages and wait for response
947 */
948 if (elp_debug >= 3)
949 printk(KERN_DEBUG "%s: sending 82586 configure command\n", dev->name);
950 adapter->tx_pcb.command = CMD_CONFIGURE_82586;
951 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
952 adapter->tx_pcb.length = 2;
953 adapter->got[CMD_CONFIGURE_82586] = 0;
954 if (!send_pcb(dev, &adapter->tx_pcb))
955 printk(KERN_ERR "%s: couldn't send 82586 configure command\n", dev->name);
956 else {
957 unsigned long timeout = jiffies + TIMEOUT;
958 while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
959 if (time_after_eq(jiffies, timeout))
960 TIMEOUT_MSG(__LINE__);
961 }
962
963 /* enable burst-mode DMA */
964 /* outb(0x1, dev->base_addr + PORT_AUXDMA); */
965
966 /*
967 * queue receive commands to provide buffering
968 */
969 prime_rx(dev);
970 if (elp_debug >= 3)
971 printk(KERN_DEBUG "%s: %d receive PCBs active\n", dev->name, adapter->rx_active);
972
973 /*
974 * device is now officially open!
975 */
976
977 netif_start_queue(dev);
978 return 0;
979}
980
981
982/******************************************************
983 *
984 * send a packet to the adapter
985 *
986 ******************************************************/
987
988static int send_packet(struct net_device *dev, struct sk_buff *skb)
989{
990 elp_device *adapter = dev->priv;
991 unsigned long target;
992 unsigned long flags;
993
994 /*
995 * make sure the length is even and no shorter than 60 bytes
996 */
997 unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1);
998
999 if (test_and_set_bit(0, (void *) &adapter->busy)) {
1000 if (elp_debug >= 2)
1001 printk(KERN_DEBUG "%s: transmit blocked\n", dev->name);
1002 return FALSE;
1003 }
1004
1005 adapter->stats.tx_bytes += nlen;
1006
1007 /*
1008 * send the adapter a transmit packet command. Ignore segment and offset
1009 * and make sure the length is even
1010 */
1011 adapter->tx_pcb.command = CMD_TRANSMIT_PACKET;
1012 adapter->tx_pcb.length = sizeof(struct Xmit_pkt);
1013 adapter->tx_pcb.data.xmit_pkt.buf_ofs
1014 = adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */
1015 adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen;
1016
1017 if (!send_pcb(dev, &adapter->tx_pcb)) {
1018 adapter->busy = 0;
1019 return FALSE;
1020 }
1021 /* if this happens, we die */
1022 if (test_and_set_bit(0, (void *) &adapter->dmaing))
1023 printk(KERN_DEBUG "%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction);
1024
1025 adapter->current_dma.direction = 1;
1026 adapter->current_dma.start_time = jiffies;
1027
1028 if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) {
1029 memcpy(adapter->dma_buffer, skb->data, nlen);
1030 memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len);
1031 target = isa_virt_to_bus(adapter->dma_buffer);
1032 }
1033 else {
1034 target = isa_virt_to_bus(skb->data);
1035 }
1036 adapter->current_dma.skb = skb;
1037
1038 flags=claim_dma_lock();
1039 disable_dma(dev->dma);
1040 clear_dma_ff(dev->dma);
1041 set_dma_mode(dev->dma, 0x48); /* dma memory -> io */
1042 set_dma_addr(dev->dma, target);
1043 set_dma_count(dev->dma, nlen);
1044 outb_control(adapter->hcr_val | DMAE | TCEN, dev);
1045 enable_dma(dev->dma);
1046 release_dma_lock(flags);
1047
1048 if (elp_debug >= 3)
1049 printk(KERN_DEBUG "%s: DMA transfer started\n", dev->name);
1050
1051 return TRUE;
1052}
1053
1054/*
1055 * The upper layer thinks we timed out
1056 */
1057
1058static void elp_timeout(struct net_device *dev)
1059{
1060 elp_device *adapter = dev->priv;
1061 int stat;
1062
1063 stat = inb_status(dev->base_addr);
1064 printk(KERN_WARNING "%s: transmit timed out, lost %s?\n", dev->name, (stat & ACRF) ? "interrupt" : "command");
1065 if (elp_debug >= 1)
1066 printk(KERN_DEBUG "%s: status %#02x\n", dev->name, stat);
1067 dev->trans_start = jiffies;
1068 adapter->stats.tx_dropped++;
1069 netif_wake_queue(dev);
1070}
1071
1072/******************************************************
1073 *
1074 * start the transmitter
1075 * return 0 if sent OK, else return 1
1076 *
1077 ******************************************************/
1078
1079static int elp_start_xmit(struct sk_buff *skb, struct net_device *dev)
1080{
1081 unsigned long flags;
1082 elp_device *adapter = dev->priv;
1083
1084 spin_lock_irqsave(&adapter->lock, flags);
1085 check_3c505_dma(dev);
1086
1087 if (elp_debug >= 3)
1088 printk(KERN_DEBUG "%s: request to send packet of length %d\n", dev->name, (int) skb->len);
1089
1090 netif_stop_queue(dev);
1091
1092 /*
1093 * send the packet at skb->data for skb->len
1094 */
1095 if (!send_packet(dev, skb)) {
1096 if (elp_debug >= 2) {
1097 printk(KERN_DEBUG "%s: failed to transmit packet\n", dev->name);
1098 }
1099 spin_unlock_irqrestore(&adapter->lock, flags);
1100 return 1;
1101 }
1102 if (elp_debug >= 3)
1103 printk(KERN_DEBUG "%s: packet of length %d sent\n", dev->name, (int) skb->len);
1104
1105 /*
1106 * start the transmit timeout
1107 */
1108 dev->trans_start = jiffies;
1109
1110 prime_rx(dev);
1111 spin_unlock_irqrestore(&adapter->lock, flags);
1112 netif_start_queue(dev);
1113 return 0;
1114}
1115
1116/******************************************************
1117 *
1118 * return statistics on the board
1119 *
1120 ******************************************************/
1121
1122static struct net_device_stats *elp_get_stats(struct net_device *dev)
1123{
1124 elp_device *adapter = (elp_device *) dev->priv;
1125
1126 if (elp_debug >= 3)
1127 printk(KERN_DEBUG "%s: request for stats\n", dev->name);
1128
1129 /* If the device is closed, just return the latest stats we have,
1130 - we cannot ask from the adapter without interrupts */
1131 if (!netif_running(dev))
1132 return &adapter->stats;
1133
1134 /* send a get statistics command to the board */
1135 adapter->tx_pcb.command = CMD_NETWORK_STATISTICS;
1136 adapter->tx_pcb.length = 0;
1137 adapter->got[CMD_NETWORK_STATISTICS] = 0;
1138 if (!send_pcb(dev, &adapter->tx_pcb))
1139 printk(KERN_ERR "%s: couldn't send get statistics command\n", dev->name);
1140 else {
1141 unsigned long timeout = jiffies + TIMEOUT;
1142 while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout));
1143 if (time_after_eq(jiffies, timeout)) {
1144 TIMEOUT_MSG(__LINE__);
1145 return &adapter->stats;
1146 }
1147 }
1148
1149 /* statistics are now up to date */
1150 return &adapter->stats;
1151}
1152
1153
1154static void netdev_get_drvinfo(struct net_device *dev,
1155 struct ethtool_drvinfo *info)
1156{
1157 strcpy(info->driver, DRV_NAME);
1158 strcpy(info->version, DRV_VERSION);
1159 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
1160}
1161
1162static u32 netdev_get_msglevel(struct net_device *dev)
1163{
1164 return debug;
1165}
1166
1167static void netdev_set_msglevel(struct net_device *dev, u32 level)
1168{
1169 debug = level;
1170}
1171
1172static struct ethtool_ops netdev_ethtool_ops = {
1173 .get_drvinfo = netdev_get_drvinfo,
1174 .get_msglevel = netdev_get_msglevel,
1175 .set_msglevel = netdev_set_msglevel,
1176};
1177
1178/******************************************************
1179 *
1180 * close the board
1181 *
1182 ******************************************************/
1183
1184static int elp_close(struct net_device *dev)
1185{
1186 elp_device *adapter;
1187
1188 adapter = dev->priv;
1189
1190 if (elp_debug >= 3)
1191 printk(KERN_DEBUG "%s: request to close device\n", dev->name);
1192
1193 netif_stop_queue(dev);
1194
1195 /* Someone may request the device statistic information even when
1196 * the interface is closed. The following will update the statistics
1197 * structure in the driver, so we'll be able to give current statistics.
1198 */
1199 (void) elp_get_stats(dev);
1200
1201 /*
1202 * disable interrupts on the board
1203 */
1204 outb_control(0, dev);
1205
1206 /*
1207 * release the IRQ
1208 */
1209 free_irq(dev->irq, dev);
1210
1211 free_dma(dev->dma);
1212 free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE));
1213
1214 return 0;
1215}
1216
1217
1218/************************************************************
1219 *
1220 * Set multicast list
1221 * num_addrs==0: clear mc_list
1222 * num_addrs==-1: set promiscuous mode
1223 * num_addrs>0: set mc_list
1224 *
1225 ************************************************************/
1226
1227static void elp_set_mc_list(struct net_device *dev)
1228{
1229 elp_device *adapter = (elp_device *) dev->priv;
1230 struct dev_mc_list *dmi = dev->mc_list;
1231 int i;
1232 unsigned long flags;
1233
1234 if (elp_debug >= 3)
1235 printk(KERN_DEBUG "%s: request to set multicast list\n", dev->name);
1236
1237 spin_lock_irqsave(&adapter->lock, flags);
1238
1239 if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
1240 /* send a "load multicast list" command to the board, max 10 addrs/cmd */
1241 /* if num_addrs==0 the list will be cleared */
1242 adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST;
1243 adapter->tx_pcb.length = 6 * dev->mc_count;
1244 for (i = 0; i < dev->mc_count; i++) {
1245 memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr, 6);
1246 dmi = dmi->next;
1247 }
1248 adapter->got[CMD_LOAD_MULTICAST_LIST] = 0;
1249 if (!send_pcb(dev, &adapter->tx_pcb))
1250 printk(KERN_ERR "%s: couldn't send set_multicast command\n", dev->name);
1251 else {
1252 unsigned long timeout = jiffies + TIMEOUT;
1253 while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout));
1254 if (time_after_eq(jiffies, timeout)) {
1255 TIMEOUT_MSG(__LINE__);
1256 }
1257 }
1258 if (dev->mc_count)
1259 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI;
1260 else /* num_addrs == 0 */
1261 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
1262 } else
1263 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC;
1264 /*
1265 * configure adapter to receive messages (as specified above)
1266 * and wait for response
1267 */
1268 if (elp_debug >= 3)
1269 printk(KERN_DEBUG "%s: sending 82586 configure command\n", dev->name);
1270 adapter->tx_pcb.command = CMD_CONFIGURE_82586;
1271 adapter->tx_pcb.length = 2;
1272 adapter->got[CMD_CONFIGURE_82586] = 0;
1273 if (!send_pcb(dev, &adapter->tx_pcb))
1274 {
1275 spin_unlock_irqrestore(&adapter->lock, flags);
1276 printk(KERN_ERR "%s: couldn't send 82586 configure command\n", dev->name);
1277 }
1278 else {
1279 unsigned long timeout = jiffies + TIMEOUT;
1280 spin_unlock_irqrestore(&adapter->lock, flags);
1281 while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
1282 if (time_after_eq(jiffies, timeout))
1283 TIMEOUT_MSG(__LINE__);
1284 }
1285}
1286
1287/************************************************************
1288 *
1289 * A couple of tests to see if there's 3C505 or not
1290 * Called only by elp_autodetect
1291 ************************************************************/
1292
1293static int __init elp_sense(struct net_device *dev)
1294{
1295 int addr = dev->base_addr;
1296 const char *name = dev->name;
1297 byte orig_HSR;
1298
1299 if (!request_region(addr, ELP_IO_EXTENT, "3c505"))
1300 return -ENODEV;
1301
1302 orig_HSR = inb_status(addr);
1303
1304 if (elp_debug > 0)
1305 printk(search_msg, name, addr);
1306
1307 if (orig_HSR == 0xff) {
1308 if (elp_debug > 0)
1309 printk(notfound_msg, 1);
1310 goto out;
1311 }
1312
1313 /* Wait for a while; the adapter may still be booting up */
1314 if (elp_debug > 0)
1315 printk(stilllooking_msg);
1316
1317 if (orig_HSR & DIR) {
1318 /* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */
1319 outb(0, dev->base_addr + PORT_CONTROL);
1320 set_current_state(TASK_UNINTERRUPTIBLE);
1321 schedule_timeout(30*HZ/100);
1322 if (inb_status(addr) & DIR) {
1323 if (elp_debug > 0)
1324 printk(notfound_msg, 2);
1325 goto out;
1326 }
1327 } else {
1328 /* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */
1329 outb(DIR, dev->base_addr + PORT_CONTROL);
1330 set_current_state(TASK_UNINTERRUPTIBLE);
1331 schedule_timeout(30*HZ/100);
1332 if (!(inb_status(addr) & DIR)) {
1333 if (elp_debug > 0)
1334 printk(notfound_msg, 3);
1335 goto out;
1336 }
1337 }
1338 /*
1339 * It certainly looks like a 3c505.
1340 */
1341 if (elp_debug > 0)
1342 printk(found_msg);
1343
1344 return 0;
1345out:
1346 release_region(addr, ELP_IO_EXTENT);
1347 return -ENODEV;
1348}
1349
1350/*************************************************************
1351 *
1352 * Search through addr_list[] and try to find a 3C505
1353 * Called only by eplus_probe
1354 *************************************************************/
1355
1356static int __init elp_autodetect(struct net_device *dev)
1357{
1358 int idx = 0;
1359
1360 /* if base address set, then only check that address
1361 otherwise, run through the table */
1362 if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */
1363 if (elp_sense(dev) == 0)
1364 return dev->base_addr;
1365 } else
1366 while ((dev->base_addr = addr_list[idx++])) {
1367 if (elp_sense(dev) == 0)
1368 return dev->base_addr;
1369 }
1370
1371 /* could not find an adapter */
1372 if (elp_debug > 0)
1373 printk(couldnot_msg, dev->name);
1374
1375 return 0; /* Because of this, the layer above will return -ENODEV */
1376}
1377
1378
1379/******************************************************
1380 *
1381 * probe for an Etherlink Plus board at the specified address
1382 *
1383 ******************************************************/
1384
1385/* There are three situations we need to be able to detect here:
1386
1387 * a) the card is idle
1388 * b) the card is still booting up
1389 * c) the card is stuck in a strange state (some DOS drivers do this)
1390 *
1391 * In case (a), all is well. In case (b), we wait 10 seconds to see if the
1392 * card finishes booting, and carry on if so. In case (c), we do a hard reset,
1393 * loop round, and hope for the best.
1394 *
1395 * This is all very unpleasant, but hopefully avoids the problems with the old
1396 * probe code (which had a 15-second delay if the card was idle, and didn't
1397 * work at all if it was in a weird state).
1398 */
1399
1400static int __init elplus_setup(struct net_device *dev)
1401{
1402 elp_device *adapter = dev->priv;
1403 int i, tries, tries1, okay;
1404 unsigned long timeout;
1405 unsigned long cookie = 0;
1406 int err = -ENODEV;
1407
1408 SET_MODULE_OWNER(dev);
1409
1410 /*
1411 * setup adapter structure
1412 */
1413
1414 dev->base_addr = elp_autodetect(dev);
1415 if (!dev->base_addr)
1416 return -ENODEV;
1417
1418 adapter->send_pcb_semaphore = 0;
1419
1420 for (tries1 = 0; tries1 < 3; tries1++) {
1421 outb_control((adapter->hcr_val | CMDE) & ~DIR, dev);
1422 /* First try to write just one byte, to see if the card is
1423 * responding at all normally.
1424 */
1425 timeout = jiffies + 5*HZ/100;
1426 okay = 0;
1427 while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
1428 if ((inb_status(dev->base_addr) & HCRE)) {
1429 outb_command(0, dev->base_addr); /* send a spurious byte */
1430 timeout = jiffies + 5*HZ/100;
1431 while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
1432 if (inb_status(dev->base_addr) & HCRE)
1433 okay = 1;
1434 }
1435 if (!okay) {
1436 /* Nope, it's ignoring the command register. This means that
1437 * either it's still booting up, or it's died.
1438 */
1439 printk(KERN_ERR "%s: command register wouldn't drain, ", dev->name);
1440 if ((inb_status(dev->base_addr) & 7) == 3) {
1441 /* If the adapter status is 3, it *could* still be booting.
1442 * Give it the benefit of the doubt for 10 seconds.
1443 */
1444 printk("assuming 3c505 still starting\n");
1445 timeout = jiffies + 10*HZ;
1446 while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7));
1447 if (inb_status(dev->base_addr) & 7) {
1448 printk(KERN_ERR "%s: 3c505 failed to start\n", dev->name);
1449 } else {
1450 okay = 1; /* It started */
1451 }
1452 } else {
1453 /* Otherwise, it must just be in a strange
1454 * state. We probably need to kick it.
1455 */
1456 printk("3c505 is sulking\n");
1457 }
1458 }
1459 for (tries = 0; tries < 5 && okay; tries++) {
1460
1461 /*
1462 * Try to set the Ethernet address, to make sure that the board
1463 * is working.
1464 */
1465 adapter->tx_pcb.command = CMD_STATION_ADDRESS;
1466 adapter->tx_pcb.length = 0;
1467 cookie = probe_irq_on();
1468 if (!send_pcb(dev, &adapter->tx_pcb)) {
1469 printk(KERN_ERR "%s: could not send first PCB\n", dev->name);
1470 probe_irq_off(cookie);
1471 continue;
1472 }
1473 if (!receive_pcb(dev, &adapter->rx_pcb)) {
1474 printk(KERN_ERR "%s: could not read first PCB\n", dev->name);
1475 probe_irq_off(cookie);
1476 continue;
1477 }
1478 if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) ||
1479 (adapter->rx_pcb.length != 6)) {
1480 printk(KERN_ERR "%s: first PCB wrong (%d, %d)\n", dev->name, adapter->rx_pcb.command, adapter->rx_pcb.length);
1481 probe_irq_off(cookie);
1482 continue;
1483 }
1484 goto okay;
1485 }
1486 /* It's broken. Do a hard reset to re-initialise the board,
1487 * and try again.
1488 */
1489 printk(KERN_INFO "%s: resetting adapter\n", dev->name);
1490 outb_control(adapter->hcr_val | FLSH | ATTN, dev);
1491 outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev);
1492 }
1493 printk(KERN_ERR "%s: failed to initialise 3c505\n", dev->name);
1494 goto out;
1495
1496 okay:
1497 if (dev->irq) { /* Is there a preset IRQ? */
1498 int rpt = probe_irq_off(cookie);
1499 if (dev->irq != rpt) {
1500 printk(KERN_WARNING "%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt);
1501 }
1502 /* if dev->irq == probe_irq_off(cookie), all is well */
1503 } else /* No preset IRQ; just use what we can detect */
1504 dev->irq = probe_irq_off(cookie);
1505 switch (dev->irq) { /* Legal, sane? */
1506 case 0:
1507 printk(KERN_ERR "%s: IRQ probe failed: check 3c505 jumpers.\n",
1508 dev->name);
1509 goto out;
1510 case 1:
1511 case 6:
1512 case 8:
1513 case 13:
1514 printk(KERN_ERR "%s: Impossible IRQ %d reported by probe_irq_off().\n",
1515 dev->name, dev->irq);
1516 goto out;
1517 }
1518 /*
1519 * Now we have the IRQ number so we can disable the interrupts from
1520 * the board until the board is opened.
1521 */
1522 outb_control(adapter->hcr_val & ~CMDE, dev);
1523
1524 /*
1525 * copy Ethernet address into structure
1526 */
1527 for (i = 0; i < 6; i++)
1528 dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i];
1529
1530 /* find a DMA channel */
1531 if (!dev->dma) {
1532 if (dev->mem_start) {
1533 dev->dma = dev->mem_start & 7;
1534 }
1535 else {
1536 printk(KERN_WARNING "%s: warning, DMA channel not specified, using default\n", dev->name);
1537 dev->dma = ELP_DMA;
1538 }
1539 }
1540
1541 /*
1542 * print remainder of startup message
1543 */
1544 printk(KERN_INFO "%s: 3c505 at %#lx, irq %d, dma %d, ",
1545 dev->name, dev->base_addr, dev->irq, dev->dma);
1546 printk("addr %02x:%02x:%02x:%02x:%02x:%02x, ",
1547 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
1548 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
1549
1550 /*
1551 * read more information from the adapter
1552 */
1553
1554 adapter->tx_pcb.command = CMD_ADAPTER_INFO;
1555 adapter->tx_pcb.length = 0;
1556 if (!send_pcb(dev, &adapter->tx_pcb) ||
1557 !receive_pcb(dev, &adapter->rx_pcb) ||
1558 (adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) ||
1559 (adapter->rx_pcb.length != 10)) {
1560 printk("not responding to second PCB\n");
1561 }
1562 printk("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers, adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz);
1563
1564 /*
1565 * reconfigure the adapter memory to better suit our purposes
1566 */
1567 adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
1568 adapter->tx_pcb.length = 12;
1569 adapter->tx_pcb.data.memconf.cmd_q = 8;
1570 adapter->tx_pcb.data.memconf.rcv_q = 8;
1571 adapter->tx_pcb.data.memconf.mcast = 10;
1572 adapter->tx_pcb.data.memconf.frame = 10;
1573 adapter->tx_pcb.data.memconf.rcv_b = 10;
1574 adapter->tx_pcb.data.memconf.progs = 0;
1575 if (!send_pcb(dev, &adapter->tx_pcb) ||
1576 !receive_pcb(dev, &adapter->rx_pcb) ||
1577 (adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) ||
1578 (adapter->rx_pcb.length != 2)) {
1579 printk(KERN_ERR "%s: could not configure adapter memory\n", dev->name);
1580 }
1581 if (adapter->rx_pcb.data.configure) {
1582 printk(KERN_ERR "%s: adapter configuration failed\n", dev->name);
1583 }
1584
1585 dev->open = elp_open; /* local */
1586 dev->stop = elp_close; /* local */
1587 dev->get_stats = elp_get_stats; /* local */
1588 dev->hard_start_xmit = elp_start_xmit; /* local */
1589 dev->tx_timeout = elp_timeout; /* local */
1590 dev->watchdog_timeo = 10*HZ;
1591 dev->set_multicast_list = elp_set_mc_list; /* local */
1592 dev->ethtool_ops = &netdev_ethtool_ops; /* local */
1593
1594 memset(&(adapter->stats), 0, sizeof(struct net_device_stats));
1595 dev->mem_start = dev->mem_end = 0;
1596
1597 err = register_netdev(dev);
1598 if (err)
1599 goto out;
1600
1601 return 0;
1602out:
1603 release_region(dev->base_addr, ELP_IO_EXTENT);
1604 return err;
1605}
1606
1607#ifndef MODULE
1608struct net_device * __init elplus_probe(int unit)
1609{
1610 struct net_device *dev = alloc_etherdev(sizeof(elp_device));
1611 int err;
1612 if (!dev)
1613 return ERR_PTR(-ENOMEM);
1614
1615 sprintf(dev->name, "eth%d", unit);
1616 netdev_boot_setup_check(dev);
1617
1618 err = elplus_setup(dev);
1619 if (err) {
1620 free_netdev(dev);
1621 return ERR_PTR(err);
1622 }
1623 return dev;
1624}
1625
1626#else
1627static struct net_device *dev_3c505[ELP_MAX_CARDS];
1628static int io[ELP_MAX_CARDS];
1629static int irq[ELP_MAX_CARDS];
1630static int dma[ELP_MAX_CARDS];
1631module_param_array(io, int, NULL, 0);
1632module_param_array(irq, int, NULL, 0);
1633module_param_array(dma, int, NULL, 0);
1634MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)");
1635MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)");
1636MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)");
1637
1638int init_module(void)
1639{
1640 int this_dev, found = 0;
1641
1642 for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
1643 struct net_device *dev = alloc_etherdev(sizeof(elp_device));
1644 if (!dev)
1645 break;
1646
1647 dev->irq = irq[this_dev];
1648 dev->base_addr = io[this_dev];
1649 if (dma[this_dev]) {
1650 dev->dma = dma[this_dev];
1651 } else {
1652 dev->dma = ELP_DMA;
1653 printk(KERN_WARNING "3c505.c: warning, using default DMA channel,\n");
1654 }
1655 if (io[this_dev] == 0) {
1656 if (this_dev) {
1657 free_netdev(dev);
1658 break;
1659 }
1660 printk(KERN_NOTICE "3c505.c: module autoprobe not recommended, give io=xx.\n");
1661 }
1662 if (elplus_setup(dev) != 0) {
1663 printk(KERN_WARNING "3c505.c: Failed to register card at 0x%x.\n", io[this_dev]);
1664 free_netdev(dev);
1665 break;
1666 }
1667 dev_3c505[this_dev] = dev;
1668 found++;
1669 }
1670 if (!found)
1671 return -ENODEV;
1672 return 0;
1673}
1674
1675void cleanup_module(void)
1676{
1677 int this_dev;
1678
1679 for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
1680 struct net_device *dev = dev_3c505[this_dev];
1681 if (dev) {
1682 unregister_netdev(dev);
1683 release_region(dev->base_addr, ELP_IO_EXTENT);
1684 free_netdev(dev);
1685 }
1686 }
1687}
1688
1689#endif /* MODULE */
1690MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 23:42:35 -0500