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-rw-r--r--drivers/net/8390.c1080
-rw-r--r--drivers/net/8390.h29
-rw-r--r--drivers/net/Makefile1
-rw-r--r--drivers/net/arm/etherh.c27
-rw-r--r--drivers/net/lib8390.c1097
5 files changed, 1135 insertions, 1099 deletions
diff --git a/drivers/net/8390.c b/drivers/net/8390.c
index 3d1c599ac3cb..a82807641dcf 100644
--- a/drivers/net/8390.c
+++ b/drivers/net/8390.c
@@ -1,1104 +1,40 @@
1/* 8390.c: A general NS8390 ethernet driver core for linux. */ 1/* 8390 core for usual drivers */
2/*
3 Written 1992-94 by Donald Becker.
4
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
7
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
10
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation
13 410 Severn Ave., Suite 210
14 Annapolis MD 21403
15
16
17 This is the chip-specific code for many 8390-based ethernet adaptors.
18 This is not a complete driver, it must be combined with board-specific
19 code such as ne.c, wd.c, 3c503.c, etc.
20
21 Seeing how at least eight drivers use this code, (not counting the
22 PCMCIA ones either) it is easy to break some card by what seems like
23 a simple innocent change. Please contact me or Donald if you think
24 you have found something that needs changing. -- PG
25
26
27 Changelog:
28
29 Paul Gortmaker : remove set_bit lock, other cleanups.
30 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
31 ei_block_input() for eth_io_copy_and_sum().
32 Paul Gortmaker : exchange static int ei_pingpong for a #define,
33 also add better Tx error handling.
34 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
35 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
36 Paul Gortmaker : tweak ANK's above multicast changes a bit.
37 Paul Gortmaker : update packet statistics for v2.1.x
38 Alan Cox : support arbitary stupid port mappings on the
39 68K Macintosh. Support >16bit I/O spaces
40 Paul Gortmaker : add kmod support for auto-loading of the 8390
41 module by all drivers that require it.
42 Alan Cox : Spinlocking work, added 'BUG_83C690'
43 Paul Gortmaker : Separate out Tx timeout code from Tx path.
44 Paul Gortmaker : Remove old unused single Tx buffer code.
45 Hayato Fujiwara : Add m32r support.
46 Paul Gortmaker : use skb_padto() instead of stack scratch area
47
48 Sources:
49 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
50
51 */
52 2
53static const char version[] = 3static const char version[] =
54 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; 4 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
55 5
56#include <linux/module.h> 6#include "lib8390.c"
57#include <linux/kernel.h>
58#include <linux/jiffies.h>
59#include <linux/fs.h>
60#include <linux/types.h>
61#include <linux/string.h>
62#include <linux/bitops.h>
63#include <asm/system.h>
64#include <asm/uaccess.h>
65#include <asm/io.h>
66#include <asm/irq.h>
67#include <linux/delay.h>
68#include <linux/errno.h>
69#include <linux/fcntl.h>
70#include <linux/in.h>
71#include <linux/interrupt.h>
72#include <linux/init.h>
73#include <linux/crc32.h>
74
75#include <linux/netdevice.h>
76#include <linux/etherdevice.h>
77
78#define NS8390_CORE
79#include "8390.h"
80
81#define BUG_83C690
82
83/* These are the operational function interfaces to board-specific
84 routines.
85 void reset_8390(struct net_device *dev)
86 Resets the board associated with DEV, including a hardware reset of
87 the 8390. This is only called when there is a transmit timeout, and
88 it is always followed by 8390_init().
89 void block_output(struct net_device *dev, int count, const unsigned char *buf,
90 int start_page)
91 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
92 "page" value uses the 8390's 256-byte pages.
93 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
94 Read the 4 byte, page aligned 8390 header. *If* there is a
95 subsequent read, it will be of the rest of the packet.
96 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
97 Read COUNT bytes from the packet buffer into the skb data area. Start
98 reading from RING_OFFSET, the address as the 8390 sees it. This will always
99 follow the read of the 8390 header.
100*/
101#define ei_reset_8390 (ei_local->reset_8390)
102#define ei_block_output (ei_local->block_output)
103#define ei_block_input (ei_local->block_input)
104#define ei_get_8390_hdr (ei_local->get_8390_hdr)
105
106/* use 0 for production, 1 for verification, >2 for debug */
107#ifndef ei_debug
108int ei_debug = 1;
109#endif
110
111/* Index to functions. */
112static void ei_tx_intr(struct net_device *dev);
113static void ei_tx_err(struct net_device *dev);
114static void ei_tx_timeout(struct net_device *dev);
115static void ei_receive(struct net_device *dev);
116static void ei_rx_overrun(struct net_device *dev);
117
118/* Routines generic to NS8390-based boards. */
119static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
120 int start_page);
121static void set_multicast_list(struct net_device *dev);
122static void do_set_multicast_list(struct net_device *dev);
123
124/*
125 * SMP and the 8390 setup.
126 *
127 * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
128 * a page register that controls bank and packet buffer access. We guard
129 * this with ei_local->page_lock. Nobody should assume or set the page other
130 * than zero when the lock is not held. Lock holders must restore page 0
131 * before unlocking. Even pure readers must take the lock to protect in
132 * page 0.
133 *
134 * To make life difficult the chip can also be very slow. We therefore can't
135 * just use spinlocks. For the longer lockups we disable the irq the device
136 * sits on and hold the lock. We must hold the lock because there is a dual
137 * processor case other than interrupts (get stats/set multicast list in
138 * parallel with each other and transmit).
139 *
140 * Note: in theory we can just disable the irq on the card _but_ there is
141 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
142 * enter lock, take the queued irq. So we waddle instead of flying.
143 *
144 * Finally by special arrangement for the purpose of being generally
145 * annoying the transmit function is called bh atomic. That places
146 * restrictions on the user context callers as disable_irq won't save
147 * them.
148 */
149
150
151 7
152/**
153 * ei_open - Open/initialize the board.
154 * @dev: network device to initialize
155 *
156 * This routine goes all-out, setting everything
157 * up anew at each open, even though many of these registers should only
158 * need to be set once at boot.
159 */
160int ei_open(struct net_device *dev) 8int ei_open(struct net_device *dev)
161{ 9{
162 unsigned long flags; 10 return __ei_open(dev);
163 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
164
165 /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
166 wrapper that does e.g. media check & then calls ei_tx_timeout. */
167 if (dev->tx_timeout == NULL)
168 dev->tx_timeout = ei_tx_timeout;
169 if (dev->watchdog_timeo <= 0)
170 dev->watchdog_timeo = TX_TIMEOUT;
171
172 /*
173 * Grab the page lock so we own the register set, then call
174 * the init function.
175 */
176
177 spin_lock_irqsave(&ei_local->page_lock, flags);
178 NS8390_init(dev, 1);
179 /* Set the flag before we drop the lock, That way the IRQ arrives
180 after its set and we get no silly warnings */
181 netif_start_queue(dev);
182 spin_unlock_irqrestore(&ei_local->page_lock, flags);
183 ei_local->irqlock = 0;
184 return 0;
185} 11}
186 12
187/**
188 * ei_close - shut down network device
189 * @dev: network device to close
190 *
191 * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done.
192 */
193int ei_close(struct net_device *dev) 13int ei_close(struct net_device *dev)
194{ 14{
195 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); 15 return __ei_close(dev);
196 unsigned long flags;
197
198 /*
199 * Hold the page lock during close
200 */
201
202 spin_lock_irqsave(&ei_local->page_lock, flags);
203 NS8390_init(dev, 0);
204 spin_unlock_irqrestore(&ei_local->page_lock, flags);
205 netif_stop_queue(dev);
206 return 0;
207}
208
209/**
210 * ei_tx_timeout - handle transmit time out condition
211 * @dev: network device which has apparently fallen asleep
212 *
213 * Called by kernel when device never acknowledges a transmit has
214 * completed (or failed) - i.e. never posted a Tx related interrupt.
215 */
216
217void ei_tx_timeout(struct net_device *dev)
218{
219 long e8390_base = dev->base_addr;
220 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
221 int txsr, isr, tickssofar = jiffies - dev->trans_start;
222 unsigned long flags;
223
224#if defined(CONFIG_M32R) && defined(CONFIG_SMP)
225 unsigned long icucr;
226
227 local_irq_save(flags);
228 icucr = inl(M32R_ICU_CR1_PORTL);
229 icucr |= M32R_ICUCR_ISMOD11;
230 outl(icucr, M32R_ICU_CR1_PORTL);
231 local_irq_restore(flags);
232#endif
233 ei_local->stat.tx_errors++;
234
235 spin_lock_irqsave(&ei_local->page_lock, flags);
236 txsr = inb(e8390_base+EN0_TSR);
237 isr = inb(e8390_base+EN0_ISR);
238 spin_unlock_irqrestore(&ei_local->page_lock, flags);
239
240 printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
241 dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
242 (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
243
244 if (!isr && !ei_local->stat.tx_packets)
245 {
246 /* The 8390 probably hasn't gotten on the cable yet. */
247 ei_local->interface_num ^= 1; /* Try a different xcvr. */
248 }
249
250 /* Ugly but a reset can be slow, yet must be protected */
251
252 disable_irq_nosync_lockdep(dev->irq);
253 spin_lock(&ei_local->page_lock);
254
255 /* Try to restart the card. Perhaps the user has fixed something. */
256 ei_reset_8390(dev);
257 NS8390_init(dev, 1);
258
259 spin_unlock(&ei_local->page_lock);
260 enable_irq_lockdep(dev->irq);
261 netif_wake_queue(dev);
262}
263
264/**
265 * ei_start_xmit - begin packet transmission
266 * @skb: packet to be sent
267 * @dev: network device to which packet is sent
268 *
269 * Sends a packet to an 8390 network device.
270 */
271
272static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
273{
274 long e8390_base = dev->base_addr;
275 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
276 int send_length = skb->len, output_page;
277 unsigned long flags;
278 char buf[ETH_ZLEN];
279 char *data = skb->data;
280
281 if (skb->len < ETH_ZLEN) {
282 memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
283 memcpy(buf, data, skb->len);
284 send_length = ETH_ZLEN;
285 data = buf;
286 }
287
288 /* Mask interrupts from the ethercard.
289 SMP: We have to grab the lock here otherwise the IRQ handler
290 on another CPU can flip window and race the IRQ mask set. We end
291 up trashing the mcast filter not disabling irqs if we don't lock */
292
293 spin_lock_irqsave(&ei_local->page_lock, flags);
294 outb_p(0x00, e8390_base + EN0_IMR);
295 spin_unlock_irqrestore(&ei_local->page_lock, flags);
296
297
298 /*
299 * Slow phase with lock held.
300 */
301
302 disable_irq_nosync_lockdep_irqsave(dev->irq, &flags);
303
304 spin_lock(&ei_local->page_lock);
305
306 ei_local->irqlock = 1;
307
308 /*
309 * We have two Tx slots available for use. Find the first free
310 * slot, and then perform some sanity checks. With two Tx bufs,
311 * you get very close to transmitting back-to-back packets. With
312 * only one Tx buf, the transmitter sits idle while you reload the
313 * card, leaving a substantial gap between each transmitted packet.
314 */
315
316 if (ei_local->tx1 == 0)
317 {
318 output_page = ei_local->tx_start_page;
319 ei_local->tx1 = send_length;
320 if (ei_debug && ei_local->tx2 > 0)
321 printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
322 dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
323 }
324 else if (ei_local->tx2 == 0)
325 {
326 output_page = ei_local->tx_start_page + TX_PAGES/2;
327 ei_local->tx2 = send_length;
328 if (ei_debug && ei_local->tx1 > 0)
329 printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
330 dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
331 }
332 else
333 { /* We should never get here. */
334 if (ei_debug)
335 printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
336 dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
337 ei_local->irqlock = 0;
338 netif_stop_queue(dev);
339 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
340 spin_unlock(&ei_local->page_lock);
341 enable_irq_lockdep_irqrestore(dev->irq, &flags);
342 ei_local->stat.tx_errors++;
343 return 1;
344 }
345
346 /*
347 * Okay, now upload the packet and trigger a send if the transmitter
348 * isn't already sending. If it is busy, the interrupt handler will
349 * trigger the send later, upon receiving a Tx done interrupt.
350 */
351
352 ei_block_output(dev, send_length, data, output_page);
353
354 if (! ei_local->txing)
355 {
356 ei_local->txing = 1;
357 NS8390_trigger_send(dev, send_length, output_page);
358 dev->trans_start = jiffies;
359 if (output_page == ei_local->tx_start_page)
360 {
361 ei_local->tx1 = -1;
362 ei_local->lasttx = -1;
363 }
364 else
365 {
366 ei_local->tx2 = -1;
367 ei_local->lasttx = -2;
368 }
369 }
370 else ei_local->txqueue++;
371
372 if (ei_local->tx1 && ei_local->tx2)
373 netif_stop_queue(dev);
374 else
375 netif_start_queue(dev);
376
377 /* Turn 8390 interrupts back on. */
378 ei_local->irqlock = 0;
379 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
380
381 spin_unlock(&ei_local->page_lock);
382 enable_irq_lockdep_irqrestore(dev->irq, &flags);
383
384 dev_kfree_skb (skb);
385 ei_local->stat.tx_bytes += send_length;
386
387 return 0;
388} 16}
389 17
390/**
391 * ei_interrupt - handle the interrupts from an 8390
392 * @irq: interrupt number
393 * @dev_id: a pointer to the net_device
394 *
395 * Handle the ether interface interrupts. We pull packets from
396 * the 8390 via the card specific functions and fire them at the networking
397 * stack. We also handle transmit completions and wake the transmit path if
398 * necessary. We also update the counters and do other housekeeping as
399 * needed.
400 */
401
402irqreturn_t ei_interrupt(int irq, void *dev_id) 18irqreturn_t ei_interrupt(int irq, void *dev_id)
403{ 19{
404 struct net_device *dev = dev_id; 20 return __ei_interrupt(irq, dev_id);
405 long e8390_base;
406 int interrupts, nr_serviced = 0;
407 struct ei_device *ei_local;
408
409 e8390_base = dev->base_addr;
410 ei_local = netdev_priv(dev);
411
412 /*
413 * Protect the irq test too.
414 */
415
416 spin_lock(&ei_local->page_lock);
417
418 if (ei_local->irqlock)
419 {
420#if 1 /* This might just be an interrupt for a PCI device sharing this line */
421 /* The "irqlock" check is only for testing. */
422 printk(ei_local->irqlock
423 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
424 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
425 dev->name, inb_p(e8390_base + EN0_ISR),
426 inb_p(e8390_base + EN0_IMR));
427#endif
428 spin_unlock(&ei_local->page_lock);
429 return IRQ_NONE;
430 }
431
432 /* Change to page 0 and read the intr status reg. */
433 outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
434 if (ei_debug > 3)
435 printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
436 inb_p(e8390_base + EN0_ISR));
437
438 /* !!Assumption!! -- we stay in page 0. Don't break this. */
439 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
440 && ++nr_serviced < MAX_SERVICE)
441 {
442 if (!netif_running(dev)) {
443 printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
444 /* rmk - acknowledge the interrupts */
445 outb_p(interrupts, e8390_base + EN0_ISR);
446 interrupts = 0;
447 break;
448 }
449 if (interrupts & ENISR_OVER)
450 ei_rx_overrun(dev);
451 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
452 {
453 /* Got a good (?) packet. */
454 ei_receive(dev);
455 }
456 /* Push the next to-transmit packet through. */
457 if (interrupts & ENISR_TX)
458 ei_tx_intr(dev);
459 else if (interrupts & ENISR_TX_ERR)
460 ei_tx_err(dev);
461
462 if (interrupts & ENISR_COUNTERS)
463 {
464 ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
465 ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
466 ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
467 outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
468 }
469
470 /* Ignore any RDC interrupts that make it back to here. */
471 if (interrupts & ENISR_RDC)
472 {
473 outb_p(ENISR_RDC, e8390_base + EN0_ISR);
474 }
475
476 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
477 }
478
479 if (interrupts && ei_debug)
480 {
481 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
482 if (nr_serviced >= MAX_SERVICE)
483 {
484 /* 0xFF is valid for a card removal */
485 if(interrupts!=0xFF)
486 printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
487 dev->name, interrupts);
488 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
489 } else {
490 printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
491 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
492 }
493 }
494 spin_unlock(&ei_local->page_lock);
495 return IRQ_RETVAL(nr_serviced > 0);
496} 21}
497 22
498#ifdef CONFIG_NET_POLL_CONTROLLER 23#ifdef CONFIG_NET_POLL_CONTROLLER
499void ei_poll(struct net_device *dev) 24void ei_poll(struct net_device *dev)
500{ 25{
501 disable_irq_lockdep(dev->irq); 26 __ei_poll(dev);
502 ei_interrupt(dev->irq, dev);
503 enable_irq_lockdep(dev->irq);
504} 27}
505#endif 28#endif
506 29
507/**
508 * ei_tx_err - handle transmitter error
509 * @dev: network device which threw the exception
510 *
511 * A transmitter error has happened. Most likely excess collisions (which
512 * is a fairly normal condition). If the error is one where the Tx will
513 * have been aborted, we try and send another one right away, instead of
514 * letting the failed packet sit and collect dust in the Tx buffer. This
515 * is a much better solution as it avoids kernel based Tx timeouts, and
516 * an unnecessary card reset.
517 *
518 * Called with lock held.
519 */
520
521static void ei_tx_err(struct net_device *dev)
522{
523 long e8390_base = dev->base_addr;
524 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
525 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
526 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
527
528#ifdef VERBOSE_ERROR_DUMP
529 printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
530 if (txsr & ENTSR_ABT)
531 printk("excess-collisions ");
532 if (txsr & ENTSR_ND)
533 printk("non-deferral ");
534 if (txsr & ENTSR_CRS)
535 printk("lost-carrier ");
536 if (txsr & ENTSR_FU)
537 printk("FIFO-underrun ");
538 if (txsr & ENTSR_CDH)
539 printk("lost-heartbeat ");
540 printk("\n");
541#endif
542
543 outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
544
545 if (tx_was_aborted)
546 ei_tx_intr(dev);
547 else
548 {
549 ei_local->stat.tx_errors++;
550 if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
551 if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
552 if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++;
553 }
554}
555
556/**
557 * ei_tx_intr - transmit interrupt handler
558 * @dev: network device for which tx intr is handled
559 *
560 * We have finished a transmit: check for errors and then trigger the next
561 * packet to be sent. Called with lock held.
562 */
563
564static void ei_tx_intr(struct net_device *dev)
565{
566 long e8390_base = dev->base_addr;
567 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
568 int status = inb(e8390_base + EN0_TSR);
569
570 outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
571
572 /*
573 * There are two Tx buffers, see which one finished, and trigger
574 * the send of another one if it exists.
575 */
576 ei_local->txqueue--;
577
578 if (ei_local->tx1 < 0)
579 {
580 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
581 printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
582 ei_local->name, ei_local->lasttx, ei_local->tx1);
583 ei_local->tx1 = 0;
584 if (ei_local->tx2 > 0)
585 {
586 ei_local->txing = 1;
587 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
588 dev->trans_start = jiffies;
589 ei_local->tx2 = -1,
590 ei_local->lasttx = 2;
591 }
592 else ei_local->lasttx = 20, ei_local->txing = 0;
593 }
594 else if (ei_local->tx2 < 0)
595 {
596 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
597 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
598 ei_local->name, ei_local->lasttx, ei_local->tx2);
599 ei_local->tx2 = 0;
600 if (ei_local->tx1 > 0)
601 {
602 ei_local->txing = 1;
603 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
604 dev->trans_start = jiffies;
605 ei_local->tx1 = -1;
606 ei_local->lasttx = 1;
607 }
608 else
609 ei_local->lasttx = 10, ei_local->txing = 0;
610 }
611// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
612// dev->name, ei_local->lasttx);
613
614 /* Minimize Tx latency: update the statistics after we restart TXing. */
615 if (status & ENTSR_COL)
616 ei_local->stat.collisions++;
617 if (status & ENTSR_PTX)
618 ei_local->stat.tx_packets++;
619 else
620 {
621 ei_local->stat.tx_errors++;
622 if (status & ENTSR_ABT)
623 {
624 ei_local->stat.tx_aborted_errors++;
625 ei_local->stat.collisions += 16;
626 }
627 if (status & ENTSR_CRS)
628 ei_local->stat.tx_carrier_errors++;
629 if (status & ENTSR_FU)
630 ei_local->stat.tx_fifo_errors++;
631 if (status & ENTSR_CDH)
632 ei_local->stat.tx_heartbeat_errors++;
633 if (status & ENTSR_OWC)
634 ei_local->stat.tx_window_errors++;
635 }
636 netif_wake_queue(dev);
637}
638
639/**
640 * ei_receive - receive some packets
641 * @dev: network device with which receive will be run
642 *
643 * We have a good packet(s), get it/them out of the buffers.
644 * Called with lock held.
645 */
646
647static void ei_receive(struct net_device *dev)
648{
649 long e8390_base = dev->base_addr;
650 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
651 unsigned char rxing_page, this_frame, next_frame;
652 unsigned short current_offset;
653 int rx_pkt_count = 0;
654 struct e8390_pkt_hdr rx_frame;
655 int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
656
657 while (++rx_pkt_count < 10)
658 {
659 int pkt_len, pkt_stat;
660
661 /* Get the rx page (incoming packet pointer). */
662 outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
663 rxing_page = inb_p(e8390_base + EN1_CURPAG);
664 outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
665
666 /* Remove one frame from the ring. Boundary is always a page behind. */
667 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
668 if (this_frame >= ei_local->stop_page)
669 this_frame = ei_local->rx_start_page;
670
671 /* Someday we'll omit the previous, iff we never get this message.
672 (There is at least one clone claimed to have a problem.)
673
674 Keep quiet if it looks like a card removal. One problem here
675 is that some clones crash in roughly the same way.
676 */
677 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
678 printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
679 dev->name, this_frame, ei_local->current_page);
680
681 if (this_frame == rxing_page) /* Read all the frames? */
682 break; /* Done for now */
683
684 current_offset = this_frame << 8;
685 ei_get_8390_hdr(dev, &rx_frame, this_frame);
686
687 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
688 pkt_stat = rx_frame.status;
689
690 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
691
692 /* Check for bogosity warned by 3c503 book: the status byte is never
693 written. This happened a lot during testing! This code should be
694 cleaned up someday. */
695 if (rx_frame.next != next_frame
696 && rx_frame.next != next_frame + 1
697 && rx_frame.next != next_frame - num_rx_pages
698 && rx_frame.next != next_frame + 1 - num_rx_pages) {
699 ei_local->current_page = rxing_page;
700 outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
701 ei_local->stat.rx_errors++;
702 continue;
703 }
704
705 if (pkt_len < 60 || pkt_len > 1518)
706 {
707 if (ei_debug)
708 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
709 dev->name, rx_frame.count, rx_frame.status,
710 rx_frame.next);
711 ei_local->stat.rx_errors++;
712 ei_local->stat.rx_length_errors++;
713 }
714 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
715 {
716 struct sk_buff *skb;
717
718 skb = dev_alloc_skb(pkt_len+2);
719 if (skb == NULL)
720 {
721 if (ei_debug > 1)
722 printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
723 dev->name, pkt_len);
724 ei_local->stat.rx_dropped++;
725 break;
726 }
727 else
728 {
729 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
730 skb->dev = dev;
731 skb_put(skb, pkt_len); /* Make room */
732 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
733 skb->protocol=eth_type_trans(skb,dev);
734 netif_rx(skb);
735 dev->last_rx = jiffies;
736 ei_local->stat.rx_packets++;
737 ei_local->stat.rx_bytes += pkt_len;
738 if (pkt_stat & ENRSR_PHY)
739 ei_local->stat.multicast++;
740 }
741 }
742 else
743 {
744 if (ei_debug)
745 printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
746 dev->name, rx_frame.status, rx_frame.next,
747 rx_frame.count);
748 ei_local->stat.rx_errors++;
749 /* NB: The NIC counts CRC, frame and missed errors. */
750 if (pkt_stat & ENRSR_FO)
751 ei_local->stat.rx_fifo_errors++;
752 }
753 next_frame = rx_frame.next;
754
755 /* This _should_ never happen: it's here for avoiding bad clones. */
756 if (next_frame >= ei_local->stop_page) {
757 printk("%s: next frame inconsistency, %#2x\n", dev->name,
758 next_frame);
759 next_frame = ei_local->rx_start_page;
760 }
761 ei_local->current_page = next_frame;
762 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
763 }
764
765 /* We used to also ack ENISR_OVER here, but that would sometimes mask
766 a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
767 outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
768 return;
769}
770
771/**
772 * ei_rx_overrun - handle receiver overrun
773 * @dev: network device which threw exception
774 *
775 * We have a receiver overrun: we have to kick the 8390 to get it started
776 * again. Problem is that you have to kick it exactly as NS prescribes in
777 * the updated datasheets, or "the NIC may act in an unpredictable manner."
778 * This includes causing "the NIC to defer indefinitely when it is stopped
779 * on a busy network." Ugh.
780 * Called with lock held. Don't call this with the interrupts off or your
781 * computer will hate you - it takes 10ms or so.
782 */
783
784static void ei_rx_overrun(struct net_device *dev)
785{
786 long e8390_base = dev->base_addr;
787 unsigned char was_txing, must_resend = 0;
788 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
789
790 /*
791 * Record whether a Tx was in progress and then issue the
792 * stop command.
793 */
794 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
795 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
796
797 if (ei_debug > 1)
798 printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
799 ei_local->stat.rx_over_errors++;
800
801 /*
802 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
803 * Early datasheets said to poll the reset bit, but now they say that
804 * it "is not a reliable indicator and subsequently should be ignored."
805 * We wait at least 10ms.
806 */
807
808 mdelay(10);
809
810 /*
811 * Reset RBCR[01] back to zero as per magic incantation.
812 */
813 outb_p(0x00, e8390_base+EN0_RCNTLO);
814 outb_p(0x00, e8390_base+EN0_RCNTHI);
815
816 /*
817 * See if any Tx was interrupted or not. According to NS, this
818 * step is vital, and skipping it will cause no end of havoc.
819 */
820
821 if (was_txing)
822 {
823 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
824 if (!tx_completed)
825 must_resend = 1;
826 }
827
828 /*
829 * Have to enter loopback mode and then restart the NIC before
830 * you are allowed to slurp packets up off the ring.
831 */
832 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
833 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
834
835 /*
836 * Clear the Rx ring of all the debris, and ack the interrupt.
837 */
838 ei_receive(dev);
839 outb_p(ENISR_OVER, e8390_base+EN0_ISR);
840
841 /*
842 * Leave loopback mode, and resend any packet that got stopped.
843 */
844 outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
845 if (must_resend)
846 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
847}
848
849/*
850 * Collect the stats. This is called unlocked and from several contexts.
851 */
852
853static struct net_device_stats *get_stats(struct net_device *dev)
854{
855 long ioaddr = dev->base_addr;
856 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
857 unsigned long flags;
858
859 /* If the card is stopped, just return the present stats. */
860 if (!netif_running(dev))
861 return &ei_local->stat;
862
863 spin_lock_irqsave(&ei_local->page_lock,flags);
864 /* Read the counter registers, assuming we are in page 0. */
865 ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
866 ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
867 ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
868 spin_unlock_irqrestore(&ei_local->page_lock, flags);
869
870 return &ei_local->stat;
871}
872
873/*
874 * Form the 64 bit 8390 multicast table from the linked list of addresses
875 * associated with this dev structure.
876 */
877
878static inline void make_mc_bits(u8 *bits, struct net_device *dev)
879{
880 struct dev_mc_list *dmi;
881
882 for (dmi=dev->mc_list; dmi; dmi=dmi->next)
883 {
884 u32 crc;
885 if (dmi->dmi_addrlen != ETH_ALEN)
886 {
887 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
888 continue;
889 }
890 crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
891 /*
892 * The 8390 uses the 6 most significant bits of the
893 * CRC to index the multicast table.
894 */
895 bits[crc>>29] |= (1<<((crc>>26)&7));
896 }
897}
898
899/**
900 * do_set_multicast_list - set/clear multicast filter
901 * @dev: net device for which multicast filter is adjusted
902 *
903 * Set or clear the multicast filter for this adaptor. May be called
904 * from a BH in 2.1.x. Must be called with lock held.
905 */
906
907static void do_set_multicast_list(struct net_device *dev)
908{
909 long e8390_base = dev->base_addr;
910 int i;
911 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
912
913 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI)))
914 {
915 memset(ei_local->mcfilter, 0, 8);
916 if (dev->mc_list)
917 make_mc_bits(ei_local->mcfilter, dev);
918 }
919 else
920 memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */
921
922 /*
923 * DP8390 manuals don't specify any magic sequence for altering
924 * the multicast regs on an already running card. To be safe, we
925 * ensure multicast mode is off prior to loading up the new hash
926 * table. If this proves to be not enough, we can always resort
927 * to stopping the NIC, loading the table and then restarting.
928 *
929 * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC
930 * Elite16) appear to be write-only. The NS 8390 data sheet lists
931 * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and
932 * Ultra32 EISA) appears to have this bug fixed.
933 */
934
935 if (netif_running(dev))
936 outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
937 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
938 for(i = 0; i < 8; i++)
939 {
940 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
941#ifndef BUG_83C690
942 if(inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i])
943 printk(KERN_ERR "Multicast filter read/write mismap %d\n",i);
944#endif
945 }
946 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
947
948 if(dev->flags&IFF_PROMISC)
949 outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR);
950 else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
951 outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR);
952 else
953 outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
954 }
955
956/*
957 * Called without lock held. This is invoked from user context and may
958 * be parallel to just about everything else. Its also fairly quick and
959 * not called too often. Must protect against both bh and irq users
960 */
961
962static void set_multicast_list(struct net_device *dev)
963{
964 unsigned long flags;
965 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
966
967 spin_lock_irqsave(&ei_local->page_lock, flags);
968 do_set_multicast_list(dev);
969 spin_unlock_irqrestore(&ei_local->page_lock, flags);
970}
971
972/**
973 * ethdev_setup - init rest of 8390 device struct
974 * @dev: network device structure to init
975 *
976 * Initialize the rest of the 8390 device structure. Do NOT __init
977 * this, as it is used by 8390 based modular drivers too.
978 */
979
980static void ethdev_setup(struct net_device *dev)
981{
982 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
983 if (ei_debug > 1)
984 printk(version);
985
986 dev->hard_start_xmit = &ei_start_xmit;
987 dev->get_stats = get_stats;
988 dev->set_multicast_list = &set_multicast_list;
989
990 ether_setup(dev);
991
992 spin_lock_init(&ei_local->page_lock);
993}
994
995/**
996 * alloc_ei_netdev - alloc_etherdev counterpart for 8390
997 * @size: extra bytes to allocate
998 *
999 * Allocate 8390-specific net_device.
1000 */
1001struct net_device *__alloc_ei_netdev(int size) 30struct net_device *__alloc_ei_netdev(int size)
1002{ 31{
1003 return alloc_netdev(sizeof(struct ei_device) + size, "eth%d", 32 return ____alloc_ei_netdev(size);
1004 ethdev_setup);
1005} 33}
1006 34
1007
1008
1009
1010/* This page of functions should be 8390 generic */
1011/* Follow National Semi's recommendations for initializing the "NIC". */
1012
1013/**
1014 * NS8390_init - initialize 8390 hardware
1015 * @dev: network device to initialize
1016 * @startp: boolean. non-zero value to initiate chip processing
1017 *
1018 * Must be called with lock held.
1019 */
1020
1021void NS8390_init(struct net_device *dev, int startp) 35void NS8390_init(struct net_device *dev, int startp)
1022{ 36{
1023 long e8390_base = dev->base_addr; 37 return __NS8390_init(dev, startp);
1024 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1025 int i;
1026 int endcfg = ei_local->word16
1027 ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0))
1028 : 0x48;
1029
1030 if(sizeof(struct e8390_pkt_hdr)!=4)
1031 panic("8390.c: header struct mispacked\n");
1032 /* Follow National Semi's recommendations for initing the DP83902. */
1033 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1034 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1035 /* Clear the remote byte count registers. */
1036 outb_p(0x00, e8390_base + EN0_RCNTLO);
1037 outb_p(0x00, e8390_base + EN0_RCNTHI);
1038 /* Set to monitor and loopback mode -- this is vital!. */
1039 outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
1040 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1041 /* Set the transmit page and receive ring. */
1042 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1043 ei_local->tx1 = ei_local->tx2 = 0;
1044 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1045 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1046 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1047 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1048 /* Clear the pending interrupts and mask. */
1049 outb_p(0xFF, e8390_base + EN0_ISR);
1050 outb_p(0x00, e8390_base + EN0_IMR);
1051
1052 /* Copy the station address into the DS8390 registers. */
1053
1054 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1055 for(i = 0; i < 6; i++)
1056 {
1057 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1058 if (ei_debug > 1 && inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1059 printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
1060 }
1061
1062 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1063 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1064
1065 netif_start_queue(dev);
1066 ei_local->tx1 = ei_local->tx2 = 0;
1067 ei_local->txing = 0;
1068
1069 if (startp)
1070 {
1071 outb_p(0xff, e8390_base + EN0_ISR);
1072 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1073 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1074 outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
1075 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1076 outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
1077 do_set_multicast_list(dev); /* (re)load the mcast table */
1078 }
1079}
1080
1081/* Trigger a transmit start, assuming the length is valid.
1082 Always called with the page lock held */
1083
1084static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1085 int start_page)
1086{
1087 long e8390_base = dev->base_addr;
1088 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1089
1090 outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD);
1091
1092 if (inb_p(e8390_base + E8390_CMD) & E8390_TRANS)
1093 {
1094 printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
1095 dev->name);
1096 return;
1097 }
1098 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1099 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1100 outb_p(start_page, e8390_base + EN0_TPSR);
1101 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1102} 38}
1103 39
1104EXPORT_SYMBOL(ei_open); 40EXPORT_SYMBOL(ei_open);
diff --git a/drivers/net/8390.h b/drivers/net/8390.h
index f44f1220b3a5..fae4aa92c4b7 100644
--- a/drivers/net/8390.h
+++ b/drivers/net/8390.h
@@ -116,26 +116,23 @@ struct ei_device {
116#undef outb 116#undef outb
117#undef outb_p 117#undef outb_p
118 118
119#define inb(port) in_8(port) 119#define ei_inb(port) in_8(port)
120#define outb(val,port) out_8(port,val) 120#define ei_outb(val,port) out_8(port,val)
121#define inb_p(port) in_8(port) 121#define ei_inb_p(port) in_8(port)
122#define outb_p(val,port) out_8(port,val) 122#define ei_outb_p(val,port) out_8(port,val)
123 123
124#elif defined(CONFIG_ARM_ETHERH) || defined(CONFIG_ARM_ETHERH_MODULE) 124#elif defined(CONFIG_NE_H8300) || defined(CONFIG_NE_H8300_MODULE)
125#define EI_SHIFT(x) (ei_local->reg_offset[x]) 125#define EI_SHIFT(x) (ei_local->reg_offset[x])
126#undef inb 126#endif
127#undef inb_p
128#undef outb
129#undef outb_p
130 127
131#define inb(_p) readb(_p) 128#ifndef ei_inb
132#define outb(_v,_p) writeb(_v,_p) 129#define ei_inb(_p) inb(_p)
133#define inb_p(_p) inb(_p) 130#define ei_outb(_v,_p) outb(_v,_p)
134#define outb_p(_v,_p) outb(_v,_p) 131#define ei_inb_p(_p) inb_p(_p)
132#define ei_outb_p(_v,_p) outb_p(_v,_p)
133#endif
135 134
136#elif defined(CONFIG_NE_H8300) || defined(CONFIG_NE_H8300_MODULE) 135#ifndef EI_SHIFT
137#define EI_SHIFT(x) (ei_local->reg_offset[x])
138#else
139#define EI_SHIFT(x) (x) 136#define EI_SHIFT(x) (x)
140#endif 137#endif
141 138
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index f270bc49e571..53ccc337099c 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -90,7 +90,6 @@ obj-$(CONFIG_HP100) += hp100.o
90obj-$(CONFIG_SMC9194) += smc9194.o 90obj-$(CONFIG_SMC9194) += smc9194.o
91obj-$(CONFIG_FEC) += fec.o 91obj-$(CONFIG_FEC) += fec.o
92obj-$(CONFIG_68360_ENET) += 68360enet.o 92obj-$(CONFIG_68360_ENET) += 68360enet.o
93obj-$(CONFIG_ARM_ETHERH) += 8390.o
94obj-$(CONFIG_WD80x3) += wd.o 8390.o 93obj-$(CONFIG_WD80x3) += wd.o 8390.o
95obj-$(CONFIG_EL2) += 3c503.o 8390.o 94obj-$(CONFIG_EL2) += 3c503.o 8390.o
96obj-$(CONFIG_NE2000) += ne.o 8390.o 95obj-$(CONFIG_NE2000) += ne.o 8390.o
diff --git a/drivers/net/arm/etherh.c b/drivers/net/arm/etherh.c
index 4ae98970b282..747a71f5dd0e 100644
--- a/drivers/net/arm/etherh.c
+++ b/drivers/net/arm/etherh.c
@@ -52,7 +52,12 @@
52#include <asm/ecard.h> 52#include <asm/ecard.h>
53#include <asm/io.h> 53#include <asm/io.h>
54 54
55#include "../8390.h" 55#define EI_SHIFT(x) (ei_local->reg_offset[x])
56
57#define ei_inb(_p) readb(_p)
58#define ei_outb(_v,_p) writeb(_v,_p)
59#define ei_inb_p(_p) readb(_p)
60#define ei_outb_p(_v,_p) writeb(_v,_p)
56 61
57#define NET_DEBUG 0 62#define NET_DEBUG 0
58#define DEBUG_INIT 2 63#define DEBUG_INIT 2
@@ -60,6 +65,11 @@
60#define DRV_NAME "etherh" 65#define DRV_NAME "etherh"
61#define DRV_VERSION "1.11" 66#define DRV_VERSION "1.11"
62 67
68static char version[] __initdata =
69 "EtherH/EtherM Driver (c) 2002-2004 Russell King " DRV_VERSION "\n";
70
71#include "../lib8390.c"
72
63static unsigned int net_debug = NET_DEBUG; 73static unsigned int net_debug = NET_DEBUG;
64 74
65struct etherh_priv { 75struct etherh_priv {
@@ -87,9 +97,6 @@ MODULE_AUTHOR("Russell King");
87MODULE_DESCRIPTION("EtherH/EtherM driver"); 97MODULE_DESCRIPTION("EtherH/EtherM driver");
88MODULE_LICENSE("GPL"); 98MODULE_LICENSE("GPL");
89 99
90static char version[] __initdata =
91 "EtherH/EtherM Driver (c) 2002-2004 Russell King " DRV_VERSION "\n";
92
93#define ETHERH500_DATAPORT 0x800 /* MEMC */ 100#define ETHERH500_DATAPORT 0x800 /* MEMC */
94#define ETHERH500_NS8390 0x000 /* MEMC */ 101#define ETHERH500_NS8390 0x000 /* MEMC */
95#define ETHERH500_CTRLPORT 0x800 /* IOC */ 102#define ETHERH500_CTRLPORT 0x800 /* IOC */
@@ -360,7 +367,7 @@ etherh_block_output (struct net_device *dev, int count, const unsigned char *buf
360 printk(KERN_ERR "%s: timeout waiting for TX RDC\n", 367 printk(KERN_ERR "%s: timeout waiting for TX RDC\n",
361 dev->name); 368 dev->name);
362 etherh_reset (dev); 369 etherh_reset (dev);
363 NS8390_init (dev, 1); 370 __NS8390_init (dev, 1);
364 break; 371 break;
365 } 372 }
366 373
@@ -465,7 +472,7 @@ etherh_open(struct net_device *dev)
465 return -EINVAL; 472 return -EINVAL;
466 } 473 }
467 474
468 if (request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)) 475 if (request_irq(dev->irq, __ei_interrupt, 0, dev->name, dev))
469 return -EAGAIN; 476 return -EAGAIN;
470 477
471 /* 478 /*
@@ -491,7 +498,7 @@ etherh_open(struct net_device *dev)
491 etherh_setif(dev); 498 etherh_setif(dev);
492 499
493 etherh_reset(dev); 500 etherh_reset(dev);
494 ei_open(dev); 501 __ei_open(dev);
495 502
496 return 0; 503 return 0;
497} 504}
@@ -502,7 +509,7 @@ etherh_open(struct net_device *dev)
502static int 509static int
503etherh_close(struct net_device *dev) 510etherh_close(struct net_device *dev)
504{ 511{
505 ei_close (dev); 512 __ei_close (dev);
506 free_irq (dev->irq, dev); 513 free_irq (dev->irq, dev);
507 return 0; 514 return 0;
508} 515}
@@ -650,7 +657,7 @@ etherh_probe(struct expansion_card *ec, const struct ecard_id *id)
650 if (ret) 657 if (ret)
651 goto out; 658 goto out;
652 659
653 dev = __alloc_ei_netdev(sizeof(struct etherh_priv)); 660 dev = ____alloc_ei_netdev(sizeof(struct etherh_priv));
654 if (!dev) { 661 if (!dev) {
655 ret = -ENOMEM; 662 ret = -ENOMEM;
656 goto release; 663 goto release;
@@ -736,7 +743,7 @@ etherh_probe(struct expansion_card *ec, const struct ecard_id *id)
736 ei_local->interface_num = 0; 743 ei_local->interface_num = 0;
737 744
738 etherh_reset(dev); 745 etherh_reset(dev);
739 NS8390_init(dev, 0); 746 __NS8390_init(dev, 0);
740 747
741 ret = register_netdev(dev); 748 ret = register_netdev(dev);
742 if (ret) 749 if (ret)
diff --git a/drivers/net/lib8390.c b/drivers/net/lib8390.c
new file mode 100644
index 000000000000..e726c06b8dc6
--- /dev/null
+++ b/drivers/net/lib8390.c
@@ -0,0 +1,1097 @@
1/* 8390.c: A general NS8390 ethernet driver core for linux. */
2/*
3 Written 1992-94 by Donald Becker.
4
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
7
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
10
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation
13 410 Severn Ave., Suite 210
14 Annapolis MD 21403
15
16
17 This is the chip-specific code for many 8390-based ethernet adaptors.
18 This is not a complete driver, it must be combined with board-specific
19 code such as ne.c, wd.c, 3c503.c, etc.
20
21 Seeing how at least eight drivers use this code, (not counting the
22 PCMCIA ones either) it is easy to break some card by what seems like
23 a simple innocent change. Please contact me or Donald if you think
24 you have found something that needs changing. -- PG
25
26
27 Changelog:
28
29 Paul Gortmaker : remove set_bit lock, other cleanups.
30 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
31 ei_block_input() for eth_io_copy_and_sum().
32 Paul Gortmaker : exchange static int ei_pingpong for a #define,
33 also add better Tx error handling.
34 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
35 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
36 Paul Gortmaker : tweak ANK's above multicast changes a bit.
37 Paul Gortmaker : update packet statistics for v2.1.x
38 Alan Cox : support arbitary stupid port mappings on the
39 68K Macintosh. Support >16bit I/O spaces
40 Paul Gortmaker : add kmod support for auto-loading of the 8390
41 module by all drivers that require it.
42 Alan Cox : Spinlocking work, added 'BUG_83C690'
43 Paul Gortmaker : Separate out Tx timeout code from Tx path.
44 Paul Gortmaker : Remove old unused single Tx buffer code.
45 Hayato Fujiwara : Add m32r support.
46 Paul Gortmaker : use skb_padto() instead of stack scratch area
47
48 Sources:
49 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
50
51 */
52
53#include <linux/module.h>
54#include <linux/kernel.h>
55#include <linux/jiffies.h>
56#include <linux/fs.h>
57#include <linux/types.h>
58#include <linux/string.h>
59#include <linux/bitops.h>
60#include <asm/system.h>
61#include <asm/uaccess.h>
62#include <asm/io.h>
63#include <asm/irq.h>
64#include <linux/delay.h>
65#include <linux/errno.h>
66#include <linux/fcntl.h>
67#include <linux/in.h>
68#include <linux/interrupt.h>
69#include <linux/init.h>
70#include <linux/crc32.h>
71
72#include <linux/netdevice.h>
73#include <linux/etherdevice.h>
74
75#define NS8390_CORE
76#include "8390.h"
77
78#define BUG_83C690
79
80/* These are the operational function interfaces to board-specific
81 routines.
82 void reset_8390(struct net_device *dev)
83 Resets the board associated with DEV, including a hardware reset of
84 the 8390. This is only called when there is a transmit timeout, and
85 it is always followed by 8390_init().
86 void block_output(struct net_device *dev, int count, const unsigned char *buf,
87 int start_page)
88 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
89 "page" value uses the 8390's 256-byte pages.
90 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
91 Read the 4 byte, page aligned 8390 header. *If* there is a
92 subsequent read, it will be of the rest of the packet.
93 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
94 Read COUNT bytes from the packet buffer into the skb data area. Start
95 reading from RING_OFFSET, the address as the 8390 sees it. This will always
96 follow the read of the 8390 header.
97*/
98#define ei_reset_8390 (ei_local->reset_8390)
99#define ei_block_output (ei_local->block_output)
100#define ei_block_input (ei_local->block_input)
101#define ei_get_8390_hdr (ei_local->get_8390_hdr)
102
103/* use 0 for production, 1 for verification, >2 for debug */
104#ifndef ei_debug
105int ei_debug = 1;
106#endif
107
108/* Index to functions. */
109static void ei_tx_intr(struct net_device *dev);
110static void ei_tx_err(struct net_device *dev);
111static void ei_tx_timeout(struct net_device *dev);
112static void ei_receive(struct net_device *dev);
113static void ei_rx_overrun(struct net_device *dev);
114
115/* Routines generic to NS8390-based boards. */
116static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
117 int start_page);
118static void set_multicast_list(struct net_device *dev);
119static void do_set_multicast_list(struct net_device *dev);
120static void __NS8390_init(struct net_device *dev, int startp);
121
122/*
123 * SMP and the 8390 setup.
124 *
125 * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
126 * a page register that controls bank and packet buffer access. We guard
127 * this with ei_local->page_lock. Nobody should assume or set the page other
128 * than zero when the lock is not held. Lock holders must restore page 0
129 * before unlocking. Even pure readers must take the lock to protect in
130 * page 0.
131 *
132 * To make life difficult the chip can also be very slow. We therefore can't
133 * just use spinlocks. For the longer lockups we disable the irq the device
134 * sits on and hold the lock. We must hold the lock because there is a dual
135 * processor case other than interrupts (get stats/set multicast list in
136 * parallel with each other and transmit).
137 *
138 * Note: in theory we can just disable the irq on the card _but_ there is
139 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
140 * enter lock, take the queued irq. So we waddle instead of flying.
141 *
142 * Finally by special arrangement for the purpose of being generally
143 * annoying the transmit function is called bh atomic. That places
144 * restrictions on the user context callers as disable_irq won't save
145 * them.
146 */
147
148
149
150/**
151 * ei_open - Open/initialize the board.
152 * @dev: network device to initialize
153 *
154 * This routine goes all-out, setting everything
155 * up anew at each open, even though many of these registers should only
156 * need to be set once at boot.
157 */
158static int __ei_open(struct net_device *dev)
159{
160 unsigned long flags;
161 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
162
163 /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
164 wrapper that does e.g. media check & then calls ei_tx_timeout. */
165 if (dev->tx_timeout == NULL)
166 dev->tx_timeout = ei_tx_timeout;
167 if (dev->watchdog_timeo <= 0)
168 dev->watchdog_timeo = TX_TIMEOUT;
169
170 /*
171 * Grab the page lock so we own the register set, then call
172 * the init function.
173 */
174
175 spin_lock_irqsave(&ei_local->page_lock, flags);
176 __NS8390_init(dev, 1);
177 /* Set the flag before we drop the lock, That way the IRQ arrives
178 after its set and we get no silly warnings */
179 netif_start_queue(dev);
180 spin_unlock_irqrestore(&ei_local->page_lock, flags);
181 ei_local->irqlock = 0;
182 return 0;
183}
184
185/**
186 * ei_close - shut down network device
187 * @dev: network device to close
188 *
189 * Opposite of ei_open(). Only used when "ifconfig <devname> down" is done.
190 */
191static int __ei_close(struct net_device *dev)
192{
193 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
194 unsigned long flags;
195
196 /*
197 * Hold the page lock during close
198 */
199
200 spin_lock_irqsave(&ei_local->page_lock, flags);
201 __NS8390_init(dev, 0);
202 spin_unlock_irqrestore(&ei_local->page_lock, flags);
203 netif_stop_queue(dev);
204 return 0;
205}
206
207/**
208 * ei_tx_timeout - handle transmit time out condition
209 * @dev: network device which has apparently fallen asleep
210 *
211 * Called by kernel when device never acknowledges a transmit has
212 * completed (or failed) - i.e. never posted a Tx related interrupt.
213 */
214
215static void ei_tx_timeout(struct net_device *dev)
216{
217 unsigned long e8390_base = dev->base_addr;
218 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
219 int txsr, isr, tickssofar = jiffies - dev->trans_start;
220 unsigned long flags;
221
222#if defined(CONFIG_M32R) && defined(CONFIG_SMP)
223 unsigned long icucr;
224
225 local_irq_save(flags);
226 icucr = inl(M32R_ICU_CR1_PORTL);
227 icucr |= M32R_ICUCR_ISMOD11;
228 outl(icucr, M32R_ICU_CR1_PORTL);
229 local_irq_restore(flags);
230#endif
231 ei_local->stat.tx_errors++;
232
233 spin_lock_irqsave(&ei_local->page_lock, flags);
234 txsr = ei_inb(e8390_base+EN0_TSR);
235 isr = ei_inb(e8390_base+EN0_ISR);
236 spin_unlock_irqrestore(&ei_local->page_lock, flags);
237
238 printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
239 dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
240 (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
241
242 if (!isr && !ei_local->stat.tx_packets)
243 {
244 /* The 8390 probably hasn't gotten on the cable yet. */
245 ei_local->interface_num ^= 1; /* Try a different xcvr. */
246 }
247
248 /* Ugly but a reset can be slow, yet must be protected */
249
250 disable_irq_nosync_lockdep(dev->irq);
251 spin_lock(&ei_local->page_lock);
252
253 /* Try to restart the card. Perhaps the user has fixed something. */
254 ei_reset_8390(dev);
255 __NS8390_init(dev, 1);
256
257 spin_unlock(&ei_local->page_lock);
258 enable_irq_lockdep(dev->irq);
259 netif_wake_queue(dev);
260}
261
262/**
263 * ei_start_xmit - begin packet transmission
264 * @skb: packet to be sent
265 * @dev: network device to which packet is sent
266 *
267 * Sends a packet to an 8390 network device.
268 */
269
270static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
271{
272 unsigned long e8390_base = dev->base_addr;
273 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
274 int send_length = skb->len, output_page;
275 unsigned long flags;
276 char buf[ETH_ZLEN];
277 char *data = skb->data;
278
279 if (skb->len < ETH_ZLEN) {
280 memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
281 memcpy(buf, data, skb->len);
282 send_length = ETH_ZLEN;
283 data = buf;
284 }
285
286 /* Mask interrupts from the ethercard.
287 SMP: We have to grab the lock here otherwise the IRQ handler
288 on another CPU can flip window and race the IRQ mask set. We end
289 up trashing the mcast filter not disabling irqs if we don't lock */
290
291 spin_lock_irqsave(&ei_local->page_lock, flags);
292 ei_outb_p(0x00, e8390_base + EN0_IMR);
293 spin_unlock_irqrestore(&ei_local->page_lock, flags);
294
295
296 /*
297 * Slow phase with lock held.
298 */
299
300 disable_irq_nosync_lockdep_irqsave(dev->irq, &flags);
301
302 spin_lock(&ei_local->page_lock);
303
304 ei_local->irqlock = 1;
305
306 /*
307 * We have two Tx slots available for use. Find the first free
308 * slot, and then perform some sanity checks. With two Tx bufs,
309 * you get very close to transmitting back-to-back packets. With
310 * only one Tx buf, the transmitter sits idle while you reload the
311 * card, leaving a substantial gap between each transmitted packet.
312 */
313
314 if (ei_local->tx1 == 0)
315 {
316 output_page = ei_local->tx_start_page;
317 ei_local->tx1 = send_length;
318 if (ei_debug && ei_local->tx2 > 0)
319 printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
320 dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
321 }
322 else if (ei_local->tx2 == 0)
323 {
324 output_page = ei_local->tx_start_page + TX_PAGES/2;
325 ei_local->tx2 = send_length;
326 if (ei_debug && ei_local->tx1 > 0)
327 printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
328 dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
329 }
330 else
331 { /* We should never get here. */
332 if (ei_debug)
333 printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
334 dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
335 ei_local->irqlock = 0;
336 netif_stop_queue(dev);
337 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
338 spin_unlock(&ei_local->page_lock);
339 enable_irq_lockdep_irqrestore(dev->irq, &flags);
340 ei_local->stat.tx_errors++;
341 return 1;
342 }
343
344 /*
345 * Okay, now upload the packet and trigger a send if the transmitter
346 * isn't already sending. If it is busy, the interrupt handler will
347 * trigger the send later, upon receiving a Tx done interrupt.
348 */
349
350 ei_block_output(dev, send_length, data, output_page);
351
352 if (! ei_local->txing)
353 {
354 ei_local->txing = 1;
355 NS8390_trigger_send(dev, send_length, output_page);
356 dev->trans_start = jiffies;
357 if (output_page == ei_local->tx_start_page)
358 {
359 ei_local->tx1 = -1;
360 ei_local->lasttx = -1;
361 }
362 else
363 {
364 ei_local->tx2 = -1;
365 ei_local->lasttx = -2;
366 }
367 }
368 else ei_local->txqueue++;
369
370 if (ei_local->tx1 && ei_local->tx2)
371 netif_stop_queue(dev);
372 else
373 netif_start_queue(dev);
374
375 /* Turn 8390 interrupts back on. */
376 ei_local->irqlock = 0;
377 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
378
379 spin_unlock(&ei_local->page_lock);
380 enable_irq_lockdep_irqrestore(dev->irq, &flags);
381
382 dev_kfree_skb (skb);
383 ei_local->stat.tx_bytes += send_length;
384
385 return 0;
386}
387
388/**
389 * ei_interrupt - handle the interrupts from an 8390
390 * @irq: interrupt number
391 * @dev_id: a pointer to the net_device
392 *
393 * Handle the ether interface interrupts. We pull packets from
394 * the 8390 via the card specific functions and fire them at the networking
395 * stack. We also handle transmit completions and wake the transmit path if
396 * necessary. We also update the counters and do other housekeeping as
397 * needed.
398 */
399
400static irqreturn_t __ei_interrupt(int irq, void *dev_id)
401{
402 struct net_device *dev = dev_id;
403 unsigned long e8390_base = dev->base_addr;
404 int interrupts, nr_serviced = 0;
405 struct ei_device *ei_local = netdev_priv(dev);
406
407 /*
408 * Protect the irq test too.
409 */
410
411 spin_lock(&ei_local->page_lock);
412
413 if (ei_local->irqlock)
414 {
415#if 1 /* This might just be an interrupt for a PCI device sharing this line */
416 /* The "irqlock" check is only for testing. */
417 printk(ei_local->irqlock
418 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
419 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
420 dev->name, ei_inb_p(e8390_base + EN0_ISR),
421 ei_inb_p(e8390_base + EN0_IMR));
422#endif
423 spin_unlock(&ei_local->page_lock);
424 return IRQ_NONE;
425 }
426
427 /* Change to page 0 and read the intr status reg. */
428 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
429 if (ei_debug > 3)
430 printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
431 ei_inb_p(e8390_base + EN0_ISR));
432
433 /* !!Assumption!! -- we stay in page 0. Don't break this. */
434 while ((interrupts = ei_inb_p(e8390_base + EN0_ISR)) != 0
435 && ++nr_serviced < MAX_SERVICE)
436 {
437 if (!netif_running(dev)) {
438 printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
439 /* rmk - acknowledge the interrupts */
440 ei_outb_p(interrupts, e8390_base + EN0_ISR);
441 interrupts = 0;
442 break;
443 }
444 if (interrupts & ENISR_OVER)
445 ei_rx_overrun(dev);
446 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
447 {
448 /* Got a good (?) packet. */
449 ei_receive(dev);
450 }
451 /* Push the next to-transmit packet through. */
452 if (interrupts & ENISR_TX)
453 ei_tx_intr(dev);
454 else if (interrupts & ENISR_TX_ERR)
455 ei_tx_err(dev);
456
457 if (interrupts & ENISR_COUNTERS)
458 {
459 ei_local->stat.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0);
460 ei_local->stat.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1);
461 ei_local->stat.rx_missed_errors+= ei_inb_p(e8390_base + EN0_COUNTER2);
462 ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
463 }
464
465 /* Ignore any RDC interrupts that make it back to here. */
466 if (interrupts & ENISR_RDC)
467 {
468 ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR);
469 }
470
471 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
472 }
473
474 if (interrupts && ei_debug)
475 {
476 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
477 if (nr_serviced >= MAX_SERVICE)
478 {
479 /* 0xFF is valid for a card removal */
480 if(interrupts!=0xFF)
481 printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
482 dev->name, interrupts);
483 ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
484 } else {
485 printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
486 ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
487 }
488 }
489 spin_unlock(&ei_local->page_lock);
490 return IRQ_RETVAL(nr_serviced > 0);
491}
492
493#ifdef CONFIG_NET_POLL_CONTROLLER
494static void __ei_poll(struct net_device *dev)
495{
496 disable_irq_lockdep(dev->irq);
497 __ei_interrupt(dev->irq, dev);
498 enable_irq_lockdep(dev->irq);
499}
500#endif
501
502/**
503 * ei_tx_err - handle transmitter error
504 * @dev: network device which threw the exception
505 *
506 * A transmitter error has happened. Most likely excess collisions (which
507 * is a fairly normal condition). If the error is one where the Tx will
508 * have been aborted, we try and send another one right away, instead of
509 * letting the failed packet sit and collect dust in the Tx buffer. This
510 * is a much better solution as it avoids kernel based Tx timeouts, and
511 * an unnecessary card reset.
512 *
513 * Called with lock held.
514 */
515
516static void ei_tx_err(struct net_device *dev)
517{
518 unsigned long e8390_base = dev->base_addr;
519 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
520 unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR);
521 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
522
523#ifdef VERBOSE_ERROR_DUMP
524 printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
525 if (txsr & ENTSR_ABT)
526 printk("excess-collisions ");
527 if (txsr & ENTSR_ND)
528 printk("non-deferral ");
529 if (txsr & ENTSR_CRS)
530 printk("lost-carrier ");
531 if (txsr & ENTSR_FU)
532 printk("FIFO-underrun ");
533 if (txsr & ENTSR_CDH)
534 printk("lost-heartbeat ");
535 printk("\n");
536#endif
537
538 ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
539
540 if (tx_was_aborted)
541 ei_tx_intr(dev);
542 else
543 {
544 ei_local->stat.tx_errors++;
545 if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
546 if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
547 if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++;
548 }
549}
550
551/**
552 * ei_tx_intr - transmit interrupt handler
553 * @dev: network device for which tx intr is handled
554 *
555 * We have finished a transmit: check for errors and then trigger the next
556 * packet to be sent. Called with lock held.
557 */
558
559static void ei_tx_intr(struct net_device *dev)
560{
561 unsigned long e8390_base = dev->base_addr;
562 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
563 int status = ei_inb(e8390_base + EN0_TSR);
564
565 ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
566
567 /*
568 * There are two Tx buffers, see which one finished, and trigger
569 * the send of another one if it exists.
570 */
571 ei_local->txqueue--;
572
573 if (ei_local->tx1 < 0)
574 {
575 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
576 printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
577 ei_local->name, ei_local->lasttx, ei_local->tx1);
578 ei_local->tx1 = 0;
579 if (ei_local->tx2 > 0)
580 {
581 ei_local->txing = 1;
582 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
583 dev->trans_start = jiffies;
584 ei_local->tx2 = -1,
585 ei_local->lasttx = 2;
586 }
587 else ei_local->lasttx = 20, ei_local->txing = 0;
588 }
589 else if (ei_local->tx2 < 0)
590 {
591 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
592 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
593 ei_local->name, ei_local->lasttx, ei_local->tx2);
594 ei_local->tx2 = 0;
595 if (ei_local->tx1 > 0)
596 {
597 ei_local->txing = 1;
598 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
599 dev->trans_start = jiffies;
600 ei_local->tx1 = -1;
601 ei_local->lasttx = 1;
602 }
603 else
604 ei_local->lasttx = 10, ei_local->txing = 0;
605 }
606// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
607// dev->name, ei_local->lasttx);
608
609 /* Minimize Tx latency: update the statistics after we restart TXing. */
610 if (status & ENTSR_COL)
611 ei_local->stat.collisions++;
612 if (status & ENTSR_PTX)
613 ei_local->stat.tx_packets++;
614 else
615 {
616 ei_local->stat.tx_errors++;
617 if (status & ENTSR_ABT)
618 {
619 ei_local->stat.tx_aborted_errors++;
620 ei_local->stat.collisions += 16;
621 }
622 if (status & ENTSR_CRS)
623 ei_local->stat.tx_carrier_errors++;
624 if (status & ENTSR_FU)
625 ei_local->stat.tx_fifo_errors++;
626 if (status & ENTSR_CDH)
627 ei_local->stat.tx_heartbeat_errors++;
628 if (status & ENTSR_OWC)
629 ei_local->stat.tx_window_errors++;
630 }
631 netif_wake_queue(dev);
632}
633
634/**
635 * ei_receive - receive some packets
636 * @dev: network device with which receive will be run
637 *
638 * We have a good packet(s), get it/them out of the buffers.
639 * Called with lock held.
640 */
641
642static void ei_receive(struct net_device *dev)
643{
644 unsigned long e8390_base = dev->base_addr;
645 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
646 unsigned char rxing_page, this_frame, next_frame;
647 unsigned short current_offset;
648 int rx_pkt_count = 0;
649 struct e8390_pkt_hdr rx_frame;
650 int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
651
652 while (++rx_pkt_count < 10)
653 {
654 int pkt_len, pkt_stat;
655
656 /* Get the rx page (incoming packet pointer). */
657 ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
658 rxing_page = ei_inb_p(e8390_base + EN1_CURPAG);
659 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
660
661 /* Remove one frame from the ring. Boundary is always a page behind. */
662 this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1;
663 if (this_frame >= ei_local->stop_page)
664 this_frame = ei_local->rx_start_page;
665
666 /* Someday we'll omit the previous, iff we never get this message.
667 (There is at least one clone claimed to have a problem.)
668
669 Keep quiet if it looks like a card removal. One problem here
670 is that some clones crash in roughly the same way.
671 */
672 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
673 printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
674 dev->name, this_frame, ei_local->current_page);
675
676 if (this_frame == rxing_page) /* Read all the frames? */
677 break; /* Done for now */
678
679 current_offset = this_frame << 8;
680 ei_get_8390_hdr(dev, &rx_frame, this_frame);
681
682 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
683 pkt_stat = rx_frame.status;
684
685 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
686
687 /* Check for bogosity warned by 3c503 book: the status byte is never
688 written. This happened a lot during testing! This code should be
689 cleaned up someday. */
690 if (rx_frame.next != next_frame
691 && rx_frame.next != next_frame + 1
692 && rx_frame.next != next_frame - num_rx_pages
693 && rx_frame.next != next_frame + 1 - num_rx_pages) {
694 ei_local->current_page = rxing_page;
695 ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
696 ei_local->stat.rx_errors++;
697 continue;
698 }
699
700 if (pkt_len < 60 || pkt_len > 1518)
701 {
702 if (ei_debug)
703 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
704 dev->name, rx_frame.count, rx_frame.status,
705 rx_frame.next);
706 ei_local->stat.rx_errors++;
707 ei_local->stat.rx_length_errors++;
708 }
709 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
710 {
711 struct sk_buff *skb;
712
713 skb = dev_alloc_skb(pkt_len+2);
714 if (skb == NULL)
715 {
716 if (ei_debug > 1)
717 printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
718 dev->name, pkt_len);
719 ei_local->stat.rx_dropped++;
720 break;
721 }
722 else
723 {
724 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
725 skb->dev = dev;
726 skb_put(skb, pkt_len); /* Make room */
727 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
728 skb->protocol=eth_type_trans(skb,dev);
729 netif_rx(skb);
730 dev->last_rx = jiffies;
731 ei_local->stat.rx_packets++;
732 ei_local->stat.rx_bytes += pkt_len;
733 if (pkt_stat & ENRSR_PHY)
734 ei_local->stat.multicast++;
735 }
736 }
737 else
738 {
739 if (ei_debug)
740 printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
741 dev->name, rx_frame.status, rx_frame.next,
742 rx_frame.count);
743 ei_local->stat.rx_errors++;
744 /* NB: The NIC counts CRC, frame and missed errors. */
745 if (pkt_stat & ENRSR_FO)
746 ei_local->stat.rx_fifo_errors++;
747 }
748 next_frame = rx_frame.next;
749
750 /* This _should_ never happen: it's here for avoiding bad clones. */
751 if (next_frame >= ei_local->stop_page) {
752 printk("%s: next frame inconsistency, %#2x\n", dev->name,
753 next_frame);
754 next_frame = ei_local->rx_start_page;
755 }
756 ei_local->current_page = next_frame;
757 ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
758 }
759
760 /* We used to also ack ENISR_OVER here, but that would sometimes mask
761 a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
762 ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
763 return;
764}
765
766/**
767 * ei_rx_overrun - handle receiver overrun
768 * @dev: network device which threw exception
769 *
770 * We have a receiver overrun: we have to kick the 8390 to get it started
771 * again. Problem is that you have to kick it exactly as NS prescribes in
772 * the updated datasheets, or "the NIC may act in an unpredictable manner."
773 * This includes causing "the NIC to defer indefinitely when it is stopped
774 * on a busy network." Ugh.
775 * Called with lock held. Don't call this with the interrupts off or your
776 * computer will hate you - it takes 10ms or so.
777 */
778
779static void ei_rx_overrun(struct net_device *dev)
780{
781 unsigned long e8390_base = dev->base_addr;
782 unsigned char was_txing, must_resend = 0;
783 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
784
785 /*
786 * Record whether a Tx was in progress and then issue the
787 * stop command.
788 */
789 was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
790 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
791
792 if (ei_debug > 1)
793 printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
794 ei_local->stat.rx_over_errors++;
795
796 /*
797 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
798 * Early datasheets said to poll the reset bit, but now they say that
799 * it "is not a reliable indicator and subsequently should be ignored."
800 * We wait at least 10ms.
801 */
802
803 mdelay(10);
804
805 /*
806 * Reset RBCR[01] back to zero as per magic incantation.
807 */
808 ei_outb_p(0x00, e8390_base+EN0_RCNTLO);
809 ei_outb_p(0x00, e8390_base+EN0_RCNTHI);
810
811 /*
812 * See if any Tx was interrupted or not. According to NS, this
813 * step is vital, and skipping it will cause no end of havoc.
814 */
815
816 if (was_txing)
817 {
818 unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
819 if (!tx_completed)
820 must_resend = 1;
821 }
822
823 /*
824 * Have to enter loopback mode and then restart the NIC before
825 * you are allowed to slurp packets up off the ring.
826 */
827 ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
828 ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
829
830 /*
831 * Clear the Rx ring of all the debris, and ack the interrupt.
832 */
833 ei_receive(dev);
834 ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR);
835
836 /*
837 * Leave loopback mode, and resend any packet that got stopped.
838 */
839 ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
840 if (must_resend)
841 ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
842}
843
844/*
845 * Collect the stats. This is called unlocked and from several contexts.
846 */
847
848static struct net_device_stats *get_stats(struct net_device *dev)
849{
850 unsigned long ioaddr = dev->base_addr;
851 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
852 unsigned long flags;
853
854 /* If the card is stopped, just return the present stats. */
855 if (!netif_running(dev))
856 return &ei_local->stat;
857
858 spin_lock_irqsave(&ei_local->page_lock,flags);
859 /* Read the counter registers, assuming we are in page 0. */
860 ei_local->stat.rx_frame_errors += ei_inb_p(ioaddr + EN0_COUNTER0);
861 ei_local->stat.rx_crc_errors += ei_inb_p(ioaddr + EN0_COUNTER1);
862 ei_local->stat.rx_missed_errors+= ei_inb_p(ioaddr + EN0_COUNTER2);
863 spin_unlock_irqrestore(&ei_local->page_lock, flags);
864
865 return &ei_local->stat;
866}
867
868/*
869 * Form the 64 bit 8390 multicast table from the linked list of addresses
870 * associated with this dev structure.
871 */
872
873static inline void make_mc_bits(u8 *bits, struct net_device *dev)
874{
875 struct dev_mc_list *dmi;
876
877 for (dmi=dev->mc_list; dmi; dmi=dmi->next)
878 {
879 u32 crc;
880 if (dmi->dmi_addrlen != ETH_ALEN)
881 {
882 printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
883 continue;
884 }
885 crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
886 /*
887 * The 8390 uses the 6 most significant bits of the
888 * CRC to index the multicast table.
889 */
890 bits[crc>>29] |= (1<<((crc>>26)&7));
891 }
892}
893
894/**
895 * do_set_multicast_list - set/clear multicast filter
896 * @dev: net device for which multicast filter is adjusted
897 *
898 * Set or clear the multicast filter for this adaptor. May be called
899 * from a BH in 2.1.x. Must be called with lock held.
900 */
901
902static void do_set_multicast_list(struct net_device *dev)
903{
904 unsigned long e8390_base = dev->base_addr;
905 int i;
906 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
907
908 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI)))
909 {
910 memset(ei_local->mcfilter, 0, 8);
911 if (dev->mc_list)
912 make_mc_bits(ei_local->mcfilter, dev);
913 }
914 else
915 memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */
916
917 /*
918 * DP8390 manuals don't specify any magic sequence for altering
919 * the multicast regs on an already running card. To be safe, we
920 * ensure multicast mode is off prior to loading up the new hash
921 * table. If this proves to be not enough, we can always resort
922 * to stopping the NIC, loading the table and then restarting.
923 *
924 * Bug Alert! The MC regs on the SMC 83C690 (SMC Elite and SMC
925 * Elite16) appear to be write-only. The NS 8390 data sheet lists
926 * them as r/w so this is a bug. The SMC 83C790 (SMC Ultra and
927 * Ultra32 EISA) appears to have this bug fixed.
928 */
929
930 if (netif_running(dev))
931 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
932 ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
933 for(i = 0; i < 8; i++)
934 {
935 ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
936#ifndef BUG_83C690
937 if(ei_inb_p(e8390_base + EN1_MULT_SHIFT(i))!=ei_local->mcfilter[i])
938 printk(KERN_ERR "Multicast filter read/write mismap %d\n",i);
939#endif
940 }
941 ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
942
943 if(dev->flags&IFF_PROMISC)
944 ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR);
945 else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
946 ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR);
947 else
948 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
949 }
950
951/*
952 * Called without lock held. This is invoked from user context and may
953 * be parallel to just about everything else. Its also fairly quick and
954 * not called too often. Must protect against both bh and irq users
955 */
956
957static void set_multicast_list(struct net_device *dev)
958{
959 unsigned long flags;
960 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
961
962 spin_lock_irqsave(&ei_local->page_lock, flags);
963 do_set_multicast_list(dev);
964 spin_unlock_irqrestore(&ei_local->page_lock, flags);
965}
966
967/**
968 * ethdev_setup - init rest of 8390 device struct
969 * @dev: network device structure to init
970 *
971 * Initialize the rest of the 8390 device structure. Do NOT __init
972 * this, as it is used by 8390 based modular drivers too.
973 */
974
975static void ethdev_setup(struct net_device *dev)
976{
977 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
978 if (ei_debug > 1)
979 printk(version);
980
981 dev->hard_start_xmit = &ei_start_xmit;
982 dev->get_stats = get_stats;
983 dev->set_multicast_list = &set_multicast_list;
984
985 ether_setup(dev);
986
987 spin_lock_init(&ei_local->page_lock);
988}
989
990/**
991 * alloc_ei_netdev - alloc_etherdev counterpart for 8390
992 * @size: extra bytes to allocate
993 *
994 * Allocate 8390-specific net_device.
995 */
996static struct net_device *____alloc_ei_netdev(int size)
997{
998 return alloc_netdev(sizeof(struct ei_device) + size, "eth%d",
999 ethdev_setup);
1000}
1001
1002
1003
1004
1005/* This page of functions should be 8390 generic */
1006/* Follow National Semi's recommendations for initializing the "NIC". */
1007
1008/**
1009 * NS8390_init - initialize 8390 hardware
1010 * @dev: network device to initialize
1011 * @startp: boolean. non-zero value to initiate chip processing
1012 *
1013 * Must be called with lock held.
1014 */
1015
1016static void __NS8390_init(struct net_device *dev, int startp)
1017{
1018 unsigned long e8390_base = dev->base_addr;
1019 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1020 int i;
1021 int endcfg = ei_local->word16
1022 ? (0x48 | ENDCFG_WTS | (ei_local->bigendian ? ENDCFG_BOS : 0))
1023 : 0x48;
1024
1025 if(sizeof(struct e8390_pkt_hdr)!=4)
1026 panic("8390.c: header struct mispacked\n");
1027 /* Follow National Semi's recommendations for initing the DP83902. */
1028 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1029 ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1030 /* Clear the remote byte count registers. */
1031 ei_outb_p(0x00, e8390_base + EN0_RCNTLO);
1032 ei_outb_p(0x00, e8390_base + EN0_RCNTHI);
1033 /* Set to monitor and loopback mode -- this is vital!. */
1034 ei_outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
1035 ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1036 /* Set the transmit page and receive ring. */
1037 ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1038 ei_local->tx1 = ei_local->tx2 = 0;
1039 ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1040 ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1041 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1042 ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1043 /* Clear the pending interrupts and mask. */
1044 ei_outb_p(0xFF, e8390_base + EN0_ISR);
1045 ei_outb_p(0x00, e8390_base + EN0_IMR);
1046
1047 /* Copy the station address into the DS8390 registers. */
1048
1049 ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1050 for(i = 0; i < 6; i++)
1051 {
1052 ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1053 if (ei_debug > 1 && ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1054 printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
1055 }
1056
1057 ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1058 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1059
1060 netif_start_queue(dev);
1061 ei_local->tx1 = ei_local->tx2 = 0;
1062 ei_local->txing = 0;
1063
1064 if (startp)
1065 {
1066 ei_outb_p(0xff, e8390_base + EN0_ISR);
1067 ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1068 ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1069 ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
1070 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1071 ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
1072 do_set_multicast_list(dev); /* (re)load the mcast table */
1073 }
1074}
1075
1076/* Trigger a transmit start, assuming the length is valid.
1077 Always called with the page lock held */
1078
1079static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1080 int start_page)
1081{
1082 unsigned long e8390_base = dev->base_addr;
1083 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1084
1085 ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD);
1086
1087 if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS)
1088 {
1089 printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
1090 dev->name);
1091 return;
1092 }
1093 ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1094 ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1095 ei_outb_p(start_page, e8390_base + EN0_TPSR);
1096 ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1097}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 23:40:18 -0500