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1 /*
2 * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
3 * All rights reserved. www.lanmedia.com
4 * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
5 *
6 * This code is written by:
7 * Andrew Stanley-Jones (asj@cban.com)
8 * Rob Braun (bbraun@vix.com),
9 * Michael Graff (explorer@vix.com) and
10 * Matt Thomas (matt@3am-software.com).
11 *
12 * With Help By:
13 * David Boggs
14 * Ron Crane
15 * Alan Cox
16 *
17 * This software may be used and distributed according to the terms
18 * of the GNU General Public License version 2, incorporated herein by reference.
19 *
20 * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards.
21 *
22 * To control link specific options lmcctl is required.
23 * It can be obtained from ftp.lanmedia.com.
24 *
25 * Linux driver notes:
26 * Linux uses the device struct lmc_private to pass private information
27 * around.
28 *
29 * The initialization portion of this driver (the lmc_reset() and the
30 * lmc_dec_reset() functions, as well as the led controls and the
31 * lmc_initcsrs() functions.
32 *
33 * The watchdog function runs every second and checks to see if
34 * we still have link, and that the timing source is what we expected
35 * it to be. If link is lost, the interface is marked down, and
36 * we no longer can transmit.
37 *
38 */
39
40#include <linux/kernel.h>
41#include <linux/module.h>
42#include <linux/string.h>
43#include <linux/timer.h>
44#include <linux/ptrace.h>
45#include <linux/errno.h>
46#include <linux/ioport.h>
47#include <linux/slab.h>
48#include <linux/interrupt.h>
49#include <linux/pci.h>
50#include <linux/delay.h>
51#include <linux/hdlc.h>
52#include <linux/in.h>
53#include <linux/if_arp.h>
54#include <linux/netdevice.h>
55#include <linux/etherdevice.h>
56#include <linux/skbuff.h>
57#include <linux/inet.h>
58#include <linux/bitops.h>
59#include <asm/processor.h> /* Processor type for cache alignment. */
60#include <asm/io.h>
61#include <asm/dma.h>
62#include <asm/uaccess.h>
63//#include <asm/spinlock.h>
64
65#define DRIVER_MAJOR_VERSION 1
66#define DRIVER_MINOR_VERSION 34
67#define DRIVER_SUB_VERSION 0
68
69#define DRIVER_VERSION ((DRIVER_MAJOR_VERSION << 8) + DRIVER_MINOR_VERSION)
70
71#include "lmc.h"
72#include "lmc_var.h"
73#include "lmc_ioctl.h"
74#include "lmc_debug.h"
75#include "lmc_proto.h"
76
77static int LMC_PKT_BUF_SZ = 1542;
78
79static DEFINE_PCI_DEVICE_TABLE(lmc_pci_tbl) = {
80 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
81 PCI_VENDOR_ID_LMC, PCI_ANY_ID },
82 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
83 PCI_ANY_ID, PCI_VENDOR_ID_LMC },
84 { 0 }
85};
86
87MODULE_DEVICE_TABLE(pci, lmc_pci_tbl);
88MODULE_LICENSE("GPL v2");
89
90
91static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
92 struct net_device *dev);
93static int lmc_rx (struct net_device *dev);
94static int lmc_open(struct net_device *dev);
95static int lmc_close(struct net_device *dev);
96static struct net_device_stats *lmc_get_stats(struct net_device *dev);
97static irqreturn_t lmc_interrupt(int irq, void *dev_instance);
98static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size);
99static void lmc_softreset(lmc_softc_t * const);
100static void lmc_running_reset(struct net_device *dev);
101static int lmc_ifdown(struct net_device * const);
102static void lmc_watchdog(unsigned long data);
103static void lmc_reset(lmc_softc_t * const sc);
104static void lmc_dec_reset(lmc_softc_t * const sc);
105static void lmc_driver_timeout(struct net_device *dev);
106
107/*
108 * linux reserves 16 device specific IOCTLs. We call them
109 * LMCIOC* to control various bits of our world.
110 */
111int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
112{
113 lmc_softc_t *sc = dev_to_sc(dev);
114 lmc_ctl_t ctl;
115 int ret = -EOPNOTSUPP;
116 u16 regVal;
117 unsigned long flags;
118
119 lmc_trace(dev, "lmc_ioctl in");
120
121 /*
122 * Most functions mess with the structure
123 * Disable interrupts while we do the polling
124 */
125
126 switch (cmd) {
127 /*
128 * Return current driver state. Since we keep this up
129 * To date internally, just copy this out to the user.
130 */
131 case LMCIOCGINFO: /*fold01*/
132 if (copy_to_user(ifr->ifr_data, &sc->ictl, sizeof(lmc_ctl_t)))
133 ret = -EFAULT;
134 else
135 ret = 0;
136 break;
137
138 case LMCIOCSINFO: /*fold01*/
139 if (!capable(CAP_NET_ADMIN)) {
140 ret = -EPERM;
141 break;
142 }
143
144 if(dev->flags & IFF_UP){
145 ret = -EBUSY;
146 break;
147 }
148
149 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
150 ret = -EFAULT;
151 break;
152 }
153
154 spin_lock_irqsave(&sc->lmc_lock, flags);
155 sc->lmc_media->set_status (sc, &ctl);
156
157 if(ctl.crc_length != sc->ictl.crc_length) {
158 sc->lmc_media->set_crc_length(sc, ctl.crc_length);
159 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16)
160 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
161 else
162 sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE;
163 }
164 spin_unlock_irqrestore(&sc->lmc_lock, flags);
165
166 ret = 0;
167 break;
168
169 case LMCIOCIFTYPE: /*fold01*/
170 {
171 u16 old_type = sc->if_type;
172 u16 new_type;
173
174 if (!capable(CAP_NET_ADMIN)) {
175 ret = -EPERM;
176 break;
177 }
178
179 if (copy_from_user(&new_type, ifr->ifr_data, sizeof(u16))) {
180 ret = -EFAULT;
181 break;
182 }
183
184
185 if (new_type == old_type)
186 {
187 ret = 0 ;
188 break; /* no change */
189 }
190
191 spin_lock_irqsave(&sc->lmc_lock, flags);
192 lmc_proto_close(sc);
193
194 sc->if_type = new_type;
195 lmc_proto_attach(sc);
196 ret = lmc_proto_open(sc);
197 spin_unlock_irqrestore(&sc->lmc_lock, flags);
198 break;
199 }
200
201 case LMCIOCGETXINFO: /*fold01*/
202 spin_lock_irqsave(&sc->lmc_lock, flags);
203 sc->lmc_xinfo.Magic0 = 0xBEEFCAFE;
204
205 sc->lmc_xinfo.PciCardType = sc->lmc_cardtype;
206 sc->lmc_xinfo.PciSlotNumber = 0;
207 sc->lmc_xinfo.DriverMajorVersion = DRIVER_MAJOR_VERSION;
208 sc->lmc_xinfo.DriverMinorVersion = DRIVER_MINOR_VERSION;
209 sc->lmc_xinfo.DriverSubVersion = DRIVER_SUB_VERSION;
210 sc->lmc_xinfo.XilinxRevisionNumber =
211 lmc_mii_readreg (sc, 0, 3) & 0xf;
212 sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ;
213 sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc);
214 sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16);
215 spin_unlock_irqrestore(&sc->lmc_lock, flags);
216
217 sc->lmc_xinfo.Magic1 = 0xDEADBEEF;
218
219 if (copy_to_user(ifr->ifr_data, &sc->lmc_xinfo,
220 sizeof(struct lmc_xinfo)))
221 ret = -EFAULT;
222 else
223 ret = 0;
224
225 break;
226
227 case LMCIOCGETLMCSTATS:
228 spin_lock_irqsave(&sc->lmc_lock, flags);
229 if (sc->lmc_cardtype == LMC_CARDTYPE_T1) {
230 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB);
231 sc->extra_stats.framingBitErrorCount +=
232 lmc_mii_readreg(sc, 0, 18) & 0xff;
233 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_MSB);
234 sc->extra_stats.framingBitErrorCount +=
235 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
236 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_LSB);
237 sc->extra_stats.lineCodeViolationCount +=
238 lmc_mii_readreg(sc, 0, 18) & 0xff;
239 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_MSB);
240 sc->extra_stats.lineCodeViolationCount +=
241 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
242 lmc_mii_writereg(sc, 0, 17, T1FRAMER_AERR);
243 regVal = lmc_mii_readreg(sc, 0, 18) & 0xff;
244
245 sc->extra_stats.lossOfFrameCount +=
246 (regVal & T1FRAMER_LOF_MASK) >> 4;
247 sc->extra_stats.changeOfFrameAlignmentCount +=
248 (regVal & T1FRAMER_COFA_MASK) >> 2;
249 sc->extra_stats.severelyErroredFrameCount +=
250 regVal & T1FRAMER_SEF_MASK;
251 }
252 spin_unlock_irqrestore(&sc->lmc_lock, flags);
253 if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats,
254 sizeof(sc->lmc_device->stats)) ||
255 copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats),
256 &sc->extra_stats, sizeof(sc->extra_stats)))
257 ret = -EFAULT;
258 else
259 ret = 0;
260 break;
261
262 case LMCIOCCLEARLMCSTATS:
263 if (!capable(CAP_NET_ADMIN)) {
264 ret = -EPERM;
265 break;
266 }
267
268 spin_lock_irqsave(&sc->lmc_lock, flags);
269 memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats));
270 memset(&sc->extra_stats, 0, sizeof(sc->extra_stats));
271 sc->extra_stats.check = STATCHECK;
272 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
273 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
274 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
275 spin_unlock_irqrestore(&sc->lmc_lock, flags);
276 ret = 0;
277 break;
278
279 case LMCIOCSETCIRCUIT: /*fold01*/
280 if (!capable(CAP_NET_ADMIN)){
281 ret = -EPERM;
282 break;
283 }
284
285 if(dev->flags & IFF_UP){
286 ret = -EBUSY;
287 break;
288 }
289
290 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
291 ret = -EFAULT;
292 break;
293 }
294 spin_lock_irqsave(&sc->lmc_lock, flags);
295 sc->lmc_media->set_circuit_type(sc, ctl.circuit_type);
296 sc->ictl.circuit_type = ctl.circuit_type;
297 spin_unlock_irqrestore(&sc->lmc_lock, flags);
298 ret = 0;
299
300 break;
301
302 case LMCIOCRESET: /*fold01*/
303 if (!capable(CAP_NET_ADMIN)){
304 ret = -EPERM;
305 break;
306 }
307
308 spin_lock_irqsave(&sc->lmc_lock, flags);
309 /* Reset driver and bring back to current state */
310 printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
311 lmc_running_reset (dev);
312 printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
313
314 LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
315 spin_unlock_irqrestore(&sc->lmc_lock, flags);
316
317 ret = 0;
318 break;
319
320#ifdef DEBUG
321 case LMCIOCDUMPEVENTLOG:
322 if (copy_to_user(ifr->ifr_data, &lmcEventLogIndex, sizeof(u32))) {
323 ret = -EFAULT;
324 break;
325 }
326 if (copy_to_user(ifr->ifr_data + sizeof(u32), lmcEventLogBuf,
327 sizeof(lmcEventLogBuf)))
328 ret = -EFAULT;
329 else
330 ret = 0;
331
332 break;
333#endif /* end ifdef _DBG_EVENTLOG */
334 case LMCIOCT1CONTROL: /*fold01*/
335 if (sc->lmc_cardtype != LMC_CARDTYPE_T1){
336 ret = -EOPNOTSUPP;
337 break;
338 }
339 break;
340 case LMCIOCXILINX: /*fold01*/
341 {
342 struct lmc_xilinx_control xc; /*fold02*/
343
344 if (!capable(CAP_NET_ADMIN)){
345 ret = -EPERM;
346 break;
347 }
348
349 /*
350 * Stop the xwitter whlie we restart the hardware
351 */
352 netif_stop_queue(dev);
353
354 if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
355 ret = -EFAULT;
356 break;
357 }
358 switch(xc.command){
359 case lmc_xilinx_reset: /*fold02*/
360 {
361 u16 mii;
362 spin_lock_irqsave(&sc->lmc_lock, flags);
363 mii = lmc_mii_readreg (sc, 0, 16);
364
365 /*
366 * Make all of them 0 and make input
367 */
368 lmc_gpio_mkinput(sc, 0xff);
369
370 /*
371 * make the reset output
372 */
373 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
374
375 /*
376 * RESET low to force configuration. This also forces
377 * the transmitter clock to be internal, but we expect to reset
378 * that later anyway.
379 */
380
381 sc->lmc_gpio &= ~LMC_GEP_RESET;
382 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
383
384
385 /*
386 * hold for more than 10 microseconds
387 */
388 udelay(50);
389
390 sc->lmc_gpio |= LMC_GEP_RESET;
391 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
392
393
394 /*
395 * stop driving Xilinx-related signals
396 */
397 lmc_gpio_mkinput(sc, 0xff);
398
399 /* Reset the frammer hardware */
400 sc->lmc_media->set_link_status (sc, 1);
401 sc->lmc_media->set_status (sc, NULL);
402// lmc_softreset(sc);
403
404 {
405 int i;
406 for(i = 0; i < 5; i++){
407 lmc_led_on(sc, LMC_DS3_LED0);
408 mdelay(100);
409 lmc_led_off(sc, LMC_DS3_LED0);
410 lmc_led_on(sc, LMC_DS3_LED1);
411 mdelay(100);
412 lmc_led_off(sc, LMC_DS3_LED1);
413 lmc_led_on(sc, LMC_DS3_LED3);
414 mdelay(100);
415 lmc_led_off(sc, LMC_DS3_LED3);
416 lmc_led_on(sc, LMC_DS3_LED2);
417 mdelay(100);
418 lmc_led_off(sc, LMC_DS3_LED2);
419 }
420 }
421 spin_unlock_irqrestore(&sc->lmc_lock, flags);
422
423
424
425 ret = 0x0;
426
427 }
428
429 break;
430 case lmc_xilinx_load_prom: /*fold02*/
431 {
432 u16 mii;
433 int timeout = 500000;
434 spin_lock_irqsave(&sc->lmc_lock, flags);
435 mii = lmc_mii_readreg (sc, 0, 16);
436
437 /*
438 * Make all of them 0 and make input
439 */
440 lmc_gpio_mkinput(sc, 0xff);
441
442 /*
443 * make the reset output
444 */
445 lmc_gpio_mkoutput(sc, LMC_GEP_DP | LMC_GEP_RESET);
446
447 /*
448 * RESET low to force configuration. This also forces
449 * the transmitter clock to be internal, but we expect to reset
450 * that later anyway.
451 */
452
453 sc->lmc_gpio &= ~(LMC_GEP_RESET | LMC_GEP_DP);
454 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
455
456
457 /*
458 * hold for more than 10 microseconds
459 */
460 udelay(50);
461
462 sc->lmc_gpio |= LMC_GEP_DP | LMC_GEP_RESET;
463 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
464
465 /*
466 * busy wait for the chip to reset
467 */
468 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
469 (timeout-- > 0))
470 cpu_relax();
471
472
473 /*
474 * stop driving Xilinx-related signals
475 */
476 lmc_gpio_mkinput(sc, 0xff);
477 spin_unlock_irqrestore(&sc->lmc_lock, flags);
478
479 ret = 0x0;
480
481
482 break;
483
484 }
485
486 case lmc_xilinx_load: /*fold02*/
487 {
488 char *data;
489 int pos;
490 int timeout = 500000;
491
492 if (!xc.data) {
493 ret = -EINVAL;
494 break;
495 }
496
497 data = kmalloc(xc.len, GFP_KERNEL);
498 if (!data) {
499 ret = -ENOMEM;
500 break;
501 }
502
503 if(copy_from_user(data, xc.data, xc.len))
504 {
505 kfree(data);
506 ret = -ENOMEM;
507 break;
508 }
509
510 printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data);
511
512 spin_lock_irqsave(&sc->lmc_lock, flags);
513 lmc_gpio_mkinput(sc, 0xff);
514
515 /*
516 * Clear the Xilinx and start prgramming from the DEC
517 */
518
519 /*
520 * Set ouput as:
521 * Reset: 0 (active)
522 * DP: 0 (active)
523 * Mode: 1
524 *
525 */
526 sc->lmc_gpio = 0x00;
527 sc->lmc_gpio &= ~LMC_GEP_DP;
528 sc->lmc_gpio &= ~LMC_GEP_RESET;
529 sc->lmc_gpio |= LMC_GEP_MODE;
530 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
531
532 lmc_gpio_mkoutput(sc, LMC_GEP_MODE | LMC_GEP_DP | LMC_GEP_RESET);
533
534 /*
535 * Wait at least 10 us 20 to be safe
536 */
537 udelay(50);
538
539 /*
540 * Clear reset and activate programming lines
541 * Reset: Input
542 * DP: Input
543 * Clock: Output
544 * Data: Output
545 * Mode: Output
546 */
547 lmc_gpio_mkinput(sc, LMC_GEP_DP | LMC_GEP_RESET);
548
549 /*
550 * Set LOAD, DATA, Clock to 1
551 */
552 sc->lmc_gpio = 0x00;
553 sc->lmc_gpio |= LMC_GEP_MODE;
554 sc->lmc_gpio |= LMC_GEP_DATA;
555 sc->lmc_gpio |= LMC_GEP_CLK;
556 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
557
558 lmc_gpio_mkoutput(sc, LMC_GEP_DATA | LMC_GEP_CLK | LMC_GEP_MODE );
559
560 /*
561 * busy wait for the chip to reset
562 */
563 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
564 (timeout-- > 0))
565 cpu_relax();
566
567 printk(KERN_DEBUG "%s: Waited %d for the Xilinx to clear it's memory\n", dev->name, 500000-timeout);
568
569 for(pos = 0; pos < xc.len; pos++){
570 switch(data[pos]){
571 case 0:
572 sc->lmc_gpio &= ~LMC_GEP_DATA; /* Data is 0 */
573 break;
574 case 1:
575 sc->lmc_gpio |= LMC_GEP_DATA; /* Data is 1 */
576 break;
577 default:
578 printk(KERN_WARNING "%s Bad data in xilinx programming data at %d, got %d wanted 0 or 1\n", dev->name, pos, data[pos]);
579 sc->lmc_gpio |= LMC_GEP_DATA; /* Assume it's 1 */
580 }
581 sc->lmc_gpio &= ~LMC_GEP_CLK; /* Clock to zero */
582 sc->lmc_gpio |= LMC_GEP_MODE;
583 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
584 udelay(1);
585
586 sc->lmc_gpio |= LMC_GEP_CLK; /* Put the clack back to one */
587 sc->lmc_gpio |= LMC_GEP_MODE;
588 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
589 udelay(1);
590 }
591 if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0){
592 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (corrupted data)\n", dev->name);
593 }
594 else if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_DP) == 0){
595 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (done)\n", dev->name);
596 }
597 else {
598 printk(KERN_DEBUG "%s: Done reprogramming Xilinx, %d bits, good luck!\n", dev->name, pos);
599 }
600
601 lmc_gpio_mkinput(sc, 0xff);
602
603 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
604 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
605
606 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
607 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
608 spin_unlock_irqrestore(&sc->lmc_lock, flags);
609
610 kfree(data);
611
612 ret = 0;
613
614 break;
615 }
616 default: /*fold02*/
617 ret = -EBADE;
618 break;
619 }
620
621 netif_wake_queue(dev);
622 sc->lmc_txfull = 0;
623
624 }
625 break;
626 default: /*fold01*/
627 /* If we don't know what to do, give the protocol a shot. */
628 ret = lmc_proto_ioctl (sc, ifr, cmd);
629 break;
630 }
631
632 lmc_trace(dev, "lmc_ioctl out");
633
634 return ret;
635}
636
637
638/* the watchdog process that cruises around */
639static void lmc_watchdog (unsigned long data) /*fold00*/
640{
641 struct net_device *dev = (struct net_device *)data;
642 lmc_softc_t *sc = dev_to_sc(dev);
643 int link_status;
644 u32 ticks;
645 unsigned long flags;
646
647 lmc_trace(dev, "lmc_watchdog in");
648
649 spin_lock_irqsave(&sc->lmc_lock, flags);
650
651 if(sc->check != 0xBEAFCAFE){
652 printk("LMC: Corrupt net_device struct, breaking out\n");
653 spin_unlock_irqrestore(&sc->lmc_lock, flags);
654 return;
655 }
656
657
658 /* Make sure the tx jabber and rx watchdog are off,
659 * and the transmit and receive processes are running.
660 */
661
662 LMC_CSR_WRITE (sc, csr_15, 0x00000011);
663 sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN;
664 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
665
666 if (sc->lmc_ok == 0)
667 goto kick_timer;
668
669 LMC_EVENT_LOG(LMC_EVENT_WATCHDOG, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
670
671 /* --- begin time out check -----------------------------------
672 * check for a transmit interrupt timeout
673 * Has the packet xmt vs xmt serviced threshold been exceeded */
674 if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
675 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
676 sc->tx_TimeoutInd == 0)
677 {
678
679 /* wait for the watchdog to come around again */
680 sc->tx_TimeoutInd = 1;
681 }
682 else if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
683 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
684 sc->tx_TimeoutInd)
685 {
686
687 LMC_EVENT_LOG(LMC_EVENT_XMTINTTMO, LMC_CSR_READ (sc, csr_status), 0);
688
689 sc->tx_TimeoutDisplay = 1;
690 sc->extra_stats.tx_TimeoutCnt++;
691
692 /* DEC chip is stuck, hit it with a RESET!!!! */
693 lmc_running_reset (dev);
694
695
696 /* look at receive & transmit process state to make sure they are running */
697 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
698
699 /* look at: DSR - 02 for Reg 16
700 * CTS - 08
701 * DCD - 10
702 * RI - 20
703 * for Reg 17
704 */
705 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17));
706
707 /* reset the transmit timeout detection flag */
708 sc->tx_TimeoutInd = 0;
709 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
710 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
711 } else {
712 sc->tx_TimeoutInd = 0;
713 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
714 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
715 }
716
717 /* --- end time out check ----------------------------------- */
718
719
720 link_status = sc->lmc_media->get_link_status (sc);
721
722 /*
723 * hardware level link lost, but the interface is marked as up.
724 * Mark it as down.
725 */
726 if ((link_status == 0) && (sc->last_link_status != 0)) {
727 printk(KERN_WARNING "%s: hardware/physical link down\n", dev->name);
728 sc->last_link_status = 0;
729 /* lmc_reset (sc); Why reset??? The link can go down ok */
730
731 /* Inform the world that link has been lost */
732 netif_carrier_off(dev);
733 }
734
735 /*
736 * hardware link is up, but the interface is marked as down.
737 * Bring it back up again.
738 */
739 if (link_status != 0 && sc->last_link_status == 0) {
740 printk(KERN_WARNING "%s: hardware/physical link up\n", dev->name);
741 sc->last_link_status = 1;
742 /* lmc_reset (sc); Again why reset??? */
743
744 netif_carrier_on(dev);
745 }
746
747 /* Call media specific watchdog functions */
748 sc->lmc_media->watchdog(sc);
749
750 /*
751 * Poke the transmitter to make sure it
752 * never stops, even if we run out of mem
753 */
754 LMC_CSR_WRITE(sc, csr_rxpoll, 0);
755
756 /*
757 * Check for code that failed
758 * and try and fix it as appropriate
759 */
760 if(sc->failed_ring == 1){
761 /*
762 * Failed to setup the recv/xmit rin
763 * Try again
764 */
765 sc->failed_ring = 0;
766 lmc_softreset(sc);
767 }
768 if(sc->failed_recv_alloc == 1){
769 /*
770 * We failed to alloc mem in the
771 * interrupt handler, go through the rings
772 * and rebuild them
773 */
774 sc->failed_recv_alloc = 0;
775 lmc_softreset(sc);
776 }
777
778
779 /*
780 * remember the timer value
781 */
782kick_timer:
783
784 ticks = LMC_CSR_READ (sc, csr_gp_timer);
785 LMC_CSR_WRITE (sc, csr_gp_timer, 0xffffffffUL);
786 sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff);
787
788 /*
789 * restart this timer.
790 */
791 sc->timer.expires = jiffies + (HZ);
792 add_timer (&sc->timer);
793
794 spin_unlock_irqrestore(&sc->lmc_lock, flags);
795
796 lmc_trace(dev, "lmc_watchdog out");
797
798}
799
800static int lmc_attach(struct net_device *dev, unsigned short encoding,
801 unsigned short parity)
802{
803 if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
804 return 0;
805 return -EINVAL;
806}
807
808static const struct net_device_ops lmc_ops = {
809 .ndo_open = lmc_open,
810 .ndo_stop = lmc_close,
811 .ndo_change_mtu = hdlc_change_mtu,
812 .ndo_start_xmit = hdlc_start_xmit,
813 .ndo_do_ioctl = lmc_ioctl,
814 .ndo_tx_timeout = lmc_driver_timeout,
815 .ndo_get_stats = lmc_get_stats,
816};
817
818static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
819{
820 lmc_softc_t *sc;
821 struct net_device *dev;
822 u16 subdevice;
823 u16 AdapModelNum;
824 int err;
825 static int cards_found;
826
827 /* lmc_trace(dev, "lmc_init_one in"); */
828
829 err = pci_enable_device(pdev);
830 if (err) {
831 printk(KERN_ERR "lmc: pci enable failed: %d\n", err);
832 return err;
833 }
834
835 err = pci_request_regions(pdev, "lmc");
836 if (err) {
837 printk(KERN_ERR "lmc: pci_request_region failed\n");
838 goto err_req_io;
839 }
840
841 /*
842 * Allocate our own device structure
843 */
844 sc = kzalloc(sizeof(lmc_softc_t), GFP_KERNEL);
845 if (!sc) {
846 err = -ENOMEM;
847 goto err_kzalloc;
848 }
849
850 dev = alloc_hdlcdev(sc);
851 if (!dev) {
852 printk(KERN_ERR "lmc:alloc_netdev for device failed\n");
853 goto err_hdlcdev;
854 }
855
856
857 dev->type = ARPHRD_HDLC;
858 dev_to_hdlc(dev)->xmit = lmc_start_xmit;
859 dev_to_hdlc(dev)->attach = lmc_attach;
860 dev->netdev_ops = &lmc_ops;
861 dev->watchdog_timeo = HZ; /* 1 second */
862 dev->tx_queue_len = 100;
863 sc->lmc_device = dev;
864 sc->name = dev->name;
865 sc->if_type = LMC_PPP;
866 sc->check = 0xBEAFCAFE;
867 dev->base_addr = pci_resource_start(pdev, 0);
868 dev->irq = pdev->irq;
869 pci_set_drvdata(pdev, dev);
870 SET_NETDEV_DEV(dev, &pdev->dev);
871
872 /*
873 * This will get the protocol layer ready and do any 1 time init's
874 * Must have a valid sc and dev structure
875 */
876 lmc_proto_attach(sc);
877
878 /* Init the spin lock so can call it latter */
879
880 spin_lock_init(&sc->lmc_lock);
881 pci_set_master(pdev);
882
883 printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name,
884 dev->base_addr, dev->irq);
885
886 err = register_hdlc_device(dev);
887 if (err) {
888 printk(KERN_ERR "%s: register_netdev failed.\n", dev->name);
889 free_netdev(dev);
890 goto err_hdlcdev;
891 }
892
893 sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN;
894 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
895
896 /*
897 *
898 * Check either the subvendor or the subdevice, some systems reverse
899 * the setting in the bois, seems to be version and arch dependent?
900 * Fix the error, exchange the two values
901 */
902 if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC)
903 subdevice = pdev->subsystem_vendor;
904
905 switch (subdevice) {
906 case PCI_DEVICE_ID_LMC_HSSI:
907 printk(KERN_INFO "%s: LMC HSSI\n", dev->name);
908 sc->lmc_cardtype = LMC_CARDTYPE_HSSI;
909 sc->lmc_media = &lmc_hssi_media;
910 break;
911 case PCI_DEVICE_ID_LMC_DS3:
912 printk(KERN_INFO "%s: LMC DS3\n", dev->name);
913 sc->lmc_cardtype = LMC_CARDTYPE_DS3;
914 sc->lmc_media = &lmc_ds3_media;
915 break;
916 case PCI_DEVICE_ID_LMC_SSI:
917 printk(KERN_INFO "%s: LMC SSI\n", dev->name);
918 sc->lmc_cardtype = LMC_CARDTYPE_SSI;
919 sc->lmc_media = &lmc_ssi_media;
920 break;
921 case PCI_DEVICE_ID_LMC_T1:
922 printk(KERN_INFO "%s: LMC T1\n", dev->name);
923 sc->lmc_cardtype = LMC_CARDTYPE_T1;
924 sc->lmc_media = &lmc_t1_media;
925 break;
926 default:
927 printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
928 break;
929 }
930
931 lmc_initcsrs (sc, dev->base_addr, 8);
932
933 lmc_gpio_mkinput (sc, 0xff);
934 sc->lmc_gpio = 0; /* drive no signals yet */
935
936 sc->lmc_media->defaults (sc);
937
938 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
939
940 /* verify that the PCI Sub System ID matches the Adapter Model number
941 * from the MII register
942 */
943 AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4;
944
945 if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */
946 subdevice != PCI_DEVICE_ID_LMC_T1) &&
947 (AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */
948 subdevice != PCI_DEVICE_ID_LMC_SSI) &&
949 (AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */
950 subdevice != PCI_DEVICE_ID_LMC_DS3) &&
951 (AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */
952 subdevice != PCI_DEVICE_ID_LMC_HSSI))
953 printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI"
954 " Subsystem ID = 0x%04x\n",
955 dev->name, AdapModelNum, subdevice);
956
957 /*
958 * reset clock
959 */
960 LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL);
961
962 sc->board_idx = cards_found++;
963 sc->extra_stats.check = STATCHECK;
964 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
965 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
966 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
967
968 sc->lmc_ok = 0;
969 sc->last_link_status = 0;
970
971 lmc_trace(dev, "lmc_init_one out");
972 return 0;
973
974err_hdlcdev:
975 kfree(sc);
976err_kzalloc:
977 pci_release_regions(pdev);
978err_req_io:
979 pci_disable_device(pdev);
980 return err;
981}
982
983/*
984 * Called from pci when removing module.
985 */
986static void lmc_remove_one(struct pci_dev *pdev)
987{
988 struct net_device *dev = pci_get_drvdata(pdev);
989
990 if (dev) {
991 printk(KERN_DEBUG "%s: removing...\n", dev->name);
992 unregister_hdlc_device(dev);
993 free_netdev(dev);
994 pci_release_regions(pdev);
995 pci_disable_device(pdev);
996 }
997}
998
999/* After this is called, packets can be sent.
1000 * Does not initialize the addresses
1001 */
1002static int lmc_open(struct net_device *dev)
1003{
1004 lmc_softc_t *sc = dev_to_sc(dev);
1005 int err;
1006
1007 lmc_trace(dev, "lmc_open in");
1008
1009 lmc_led_on(sc, LMC_DS3_LED0);
1010
1011 lmc_dec_reset(sc);
1012 lmc_reset(sc);
1013
1014 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0);
1015 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16),
1016 lmc_mii_readreg(sc, 0, 17));
1017
1018 if (sc->lmc_ok){
1019 lmc_trace(dev, "lmc_open lmc_ok out");
1020 return 0;
1021 }
1022
1023 lmc_softreset (sc);
1024
1025 /* Since we have to use PCI bus, this should work on x86,alpha,ppc */
1026 if (request_irq (dev->irq, lmc_interrupt, IRQF_SHARED, dev->name, dev)){
1027 printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq);
1028 lmc_trace(dev, "lmc_open irq failed out");
1029 return -EAGAIN;
1030 }
1031 sc->got_irq = 1;
1032
1033 /* Assert Terminal Active */
1034 sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
1035 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
1036
1037 /*
1038 * reset to last state.
1039 */
1040 sc->lmc_media->set_status (sc, NULL);
1041
1042 /* setup default bits to be used in tulip_desc_t transmit descriptor
1043 * -baz */
1044 sc->TxDescriptControlInit = (
1045 LMC_TDES_INTERRUPT_ON_COMPLETION
1046 | LMC_TDES_FIRST_SEGMENT
1047 | LMC_TDES_LAST_SEGMENT
1048 | LMC_TDES_SECOND_ADDR_CHAINED
1049 | LMC_TDES_DISABLE_PADDING
1050 );
1051
1052 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) {
1053 /* disable 32 bit CRC generated by ASIC */
1054 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
1055 }
1056 sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length);
1057 /* Acknoledge the Terminal Active and light LEDs */
1058
1059 /* dev->flags |= IFF_UP; */
1060
1061 if ((err = lmc_proto_open(sc)) != 0)
1062 return err;
1063
1064 netif_start_queue(dev);
1065 sc->extra_stats.tx_tbusy0++;
1066
1067 /*
1068 * select what interrupts we want to get
1069 */
1070 sc->lmc_intrmask = 0;
1071 /* Should be using the default interrupt mask defined in the .h file. */
1072 sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
1073 | TULIP_STS_RXINTR
1074 | TULIP_STS_TXINTR
1075 | TULIP_STS_ABNRMLINTR
1076 | TULIP_STS_SYSERROR
1077 | TULIP_STS_TXSTOPPED
1078 | TULIP_STS_TXUNDERFLOW
1079 | TULIP_STS_RXSTOPPED
1080 | TULIP_STS_RXNOBUF
1081 );
1082 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1083
1084 sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
1085 sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
1086 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1087
1088 sc->lmc_ok = 1; /* Run watchdog */
1089
1090 /*
1091 * Set the if up now - pfb
1092 */
1093
1094 sc->last_link_status = 1;
1095
1096 /*
1097 * Setup a timer for the watchdog on probe, and start it running.
1098 * Since lmc_ok == 0, it will be a NOP for now.
1099 */
1100 init_timer (&sc->timer);
1101 sc->timer.expires = jiffies + HZ;
1102 sc->timer.data = (unsigned long) dev;
1103 sc->timer.function = lmc_watchdog;
1104 add_timer (&sc->timer);
1105
1106 lmc_trace(dev, "lmc_open out");
1107
1108 return 0;
1109}
1110
1111/* Total reset to compensate for the AdTran DSU doing bad things
1112 * under heavy load
1113 */
1114
1115static void lmc_running_reset (struct net_device *dev) /*fold00*/
1116{
1117 lmc_softc_t *sc = dev_to_sc(dev);
1118
1119 lmc_trace(dev, "lmc_running_reset in");
1120
1121 /* stop interrupts */
1122 /* Clear the interrupt mask */
1123 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1124
1125 lmc_dec_reset (sc);
1126 lmc_reset (sc);
1127 lmc_softreset (sc);
1128 /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */
1129 sc->lmc_media->set_link_status (sc, 1);
1130 sc->lmc_media->set_status (sc, NULL);
1131
1132 netif_wake_queue(dev);
1133
1134 sc->lmc_txfull = 0;
1135 sc->extra_stats.tx_tbusy0++;
1136
1137 sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK;
1138 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1139
1140 sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN);
1141 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1142
1143 lmc_trace(dev, "lmc_runnin_reset_out");
1144}
1145
1146
1147/* This is what is called when you ifconfig down a device.
1148 * This disables the timer for the watchdog and keepalives,
1149 * and disables the irq for dev.
1150 */
1151static int lmc_close(struct net_device *dev)
1152{
1153 /* not calling release_region() as we should */
1154 lmc_softc_t *sc = dev_to_sc(dev);
1155
1156 lmc_trace(dev, "lmc_close in");
1157
1158 sc->lmc_ok = 0;
1159 sc->lmc_media->set_link_status (sc, 0);
1160 del_timer (&sc->timer);
1161 lmc_proto_close(sc);
1162 lmc_ifdown (dev);
1163
1164 lmc_trace(dev, "lmc_close out");
1165
1166 return 0;
1167}
1168
1169/* Ends the transfer of packets */
1170/* When the interface goes down, this is called */
1171static int lmc_ifdown (struct net_device *dev) /*fold00*/
1172{
1173 lmc_softc_t *sc = dev_to_sc(dev);
1174 u32 csr6;
1175 int i;
1176
1177 lmc_trace(dev, "lmc_ifdown in");
1178
1179 /* Don't let anything else go on right now */
1180 // dev->start = 0;
1181 netif_stop_queue(dev);
1182 sc->extra_stats.tx_tbusy1++;
1183
1184 /* stop interrupts */
1185 /* Clear the interrupt mask */
1186 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1187
1188 /* Stop Tx and Rx on the chip */
1189 csr6 = LMC_CSR_READ (sc, csr_command);
1190 csr6 &= ~LMC_DEC_ST; /* Turn off the Transmission bit */
1191 csr6 &= ~LMC_DEC_SR; /* Turn off the Receive bit */
1192 LMC_CSR_WRITE (sc, csr_command, csr6);
1193
1194 sc->lmc_device->stats.rx_missed_errors +=
1195 LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1196
1197 /* release the interrupt */
1198 if(sc->got_irq == 1){
1199 free_irq (dev->irq, dev);
1200 sc->got_irq = 0;
1201 }
1202
1203 /* free skbuffs in the Rx queue */
1204 for (i = 0; i < LMC_RXDESCS; i++)
1205 {
1206 struct sk_buff *skb = sc->lmc_rxq[i];
1207 sc->lmc_rxq[i] = NULL;
1208 sc->lmc_rxring[i].status = 0;
1209 sc->lmc_rxring[i].length = 0;
1210 sc->lmc_rxring[i].buffer1 = 0xDEADBEEF;
1211 if (skb != NULL)
1212 dev_kfree_skb(skb);
1213 sc->lmc_rxq[i] = NULL;
1214 }
1215
1216 for (i = 0; i < LMC_TXDESCS; i++)
1217 {
1218 if (sc->lmc_txq[i] != NULL)
1219 dev_kfree_skb(sc->lmc_txq[i]);
1220 sc->lmc_txq[i] = NULL;
1221 }
1222
1223 lmc_led_off (sc, LMC_MII16_LED_ALL);
1224
1225 netif_wake_queue(dev);
1226 sc->extra_stats.tx_tbusy0++;
1227
1228 lmc_trace(dev, "lmc_ifdown out");
1229
1230 return 0;
1231}
1232
1233/* Interrupt handling routine. This will take an incoming packet, or clean
1234 * up after a trasmit.
1235 */
1236static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/
1237{
1238 struct net_device *dev = (struct net_device *) dev_instance;
1239 lmc_softc_t *sc = dev_to_sc(dev);
1240 u32 csr;
1241 int i;
1242 s32 stat;
1243 unsigned int badtx;
1244 u32 firstcsr;
1245 int max_work = LMC_RXDESCS;
1246 int handled = 0;
1247
1248 lmc_trace(dev, "lmc_interrupt in");
1249
1250 spin_lock(&sc->lmc_lock);
1251
1252 /*
1253 * Read the csr to find what interrupts we have (if any)
1254 */
1255 csr = LMC_CSR_READ (sc, csr_status);
1256
1257 /*
1258 * Make sure this is our interrupt
1259 */
1260 if ( ! (csr & sc->lmc_intrmask)) {
1261 goto lmc_int_fail_out;
1262 }
1263
1264 firstcsr = csr;
1265
1266 /* always go through this loop at least once */
1267 while (csr & sc->lmc_intrmask) {
1268 handled = 1;
1269
1270 /*
1271 * Clear interrupt bits, we handle all case below
1272 */
1273 LMC_CSR_WRITE (sc, csr_status, csr);
1274
1275 /*
1276 * One of
1277 * - Transmit process timed out CSR5<1>
1278 * - Transmit jabber timeout CSR5<3>
1279 * - Transmit underflow CSR5<5>
1280 * - Transmit Receiver buffer unavailable CSR5<7>
1281 * - Receive process stopped CSR5<8>
1282 * - Receive watchdog timeout CSR5<9>
1283 * - Early transmit interrupt CSR5<10>
1284 *
1285 * Is this really right? Should we do a running reset for jabber?
1286 * (being a WAN card and all)
1287 */
1288 if (csr & TULIP_STS_ABNRMLINTR){
1289 lmc_running_reset (dev);
1290 break;
1291 }
1292
1293 if (csr & TULIP_STS_RXINTR){
1294 lmc_trace(dev, "rx interrupt");
1295 lmc_rx (dev);
1296
1297 }
1298 if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) {
1299
1300 int n_compl = 0 ;
1301 /* reset the transmit timeout detection flag -baz */
1302 sc->extra_stats.tx_NoCompleteCnt = 0;
1303
1304 badtx = sc->lmc_taint_tx;
1305 i = badtx % LMC_TXDESCS;
1306
1307 while ((badtx < sc->lmc_next_tx)) {
1308 stat = sc->lmc_txring[i].status;
1309
1310 LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat,
1311 sc->lmc_txring[i].length);
1312 /*
1313 * If bit 31 is 1 the tulip owns it break out of the loop
1314 */
1315 if (stat & 0x80000000)
1316 break;
1317
1318 n_compl++ ; /* i.e., have an empty slot in ring */
1319 /*
1320 * If we have no skbuff or have cleared it
1321 * Already continue to the next buffer
1322 */
1323 if (sc->lmc_txq[i] == NULL)
1324 continue;
1325
1326 /*
1327 * Check the total error summary to look for any errors
1328 */
1329 if (stat & 0x8000) {
1330 sc->lmc_device->stats.tx_errors++;
1331 if (stat & 0x4104)
1332 sc->lmc_device->stats.tx_aborted_errors++;
1333 if (stat & 0x0C00)
1334 sc->lmc_device->stats.tx_carrier_errors++;
1335 if (stat & 0x0200)
1336 sc->lmc_device->stats.tx_window_errors++;
1337 if (stat & 0x0002)
1338 sc->lmc_device->stats.tx_fifo_errors++;
1339 } else {
1340 sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff;
1341
1342 sc->lmc_device->stats.tx_packets++;
1343 }
1344
1345 // dev_kfree_skb(sc->lmc_txq[i]);
1346 dev_kfree_skb_irq(sc->lmc_txq[i]);
1347 sc->lmc_txq[i] = NULL;
1348
1349 badtx++;
1350 i = badtx % LMC_TXDESCS;
1351 }
1352
1353 if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1354 {
1355 printk ("%s: out of sync pointer\n", dev->name);
1356 badtx += LMC_TXDESCS;
1357 }
1358 LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1359 sc->lmc_txfull = 0;
1360 netif_wake_queue(dev);
1361 sc->extra_stats.tx_tbusy0++;
1362
1363
1364#ifdef DEBUG
1365 sc->extra_stats.dirtyTx = badtx;
1366 sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1367 sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1368#endif
1369 sc->lmc_taint_tx = badtx;
1370
1371 /*
1372 * Why was there a break here???
1373 */
1374 } /* end handle transmit interrupt */
1375
1376 if (csr & TULIP_STS_SYSERROR) {
1377 u32 error;
1378 printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1379 error = csr>>23 & 0x7;
1380 switch(error){
1381 case 0x000:
1382 printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1383 break;
1384 case 0x001:
1385 printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1386 break;
1387 case 0x010:
1388 printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1389 break;
1390 default:
1391 printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1392 }
1393 lmc_dec_reset (sc);
1394 lmc_reset (sc);
1395 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1396 LMC_EVENT_LOG(LMC_EVENT_RESET2,
1397 lmc_mii_readreg (sc, 0, 16),
1398 lmc_mii_readreg (sc, 0, 17));
1399
1400 }
1401
1402
1403 if(max_work-- <= 0)
1404 break;
1405
1406 /*
1407 * Get current csr status to make sure
1408 * we've cleared all interrupts
1409 */
1410 csr = LMC_CSR_READ (sc, csr_status);
1411 } /* end interrupt loop */
1412 LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1413
1414lmc_int_fail_out:
1415
1416 spin_unlock(&sc->lmc_lock);
1417
1418 lmc_trace(dev, "lmc_interrupt out");
1419 return IRQ_RETVAL(handled);
1420}
1421
1422static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
1423 struct net_device *dev)
1424{
1425 lmc_softc_t *sc = dev_to_sc(dev);
1426 u32 flag;
1427 int entry;
1428 unsigned long flags;
1429
1430 lmc_trace(dev, "lmc_start_xmit in");
1431
1432 spin_lock_irqsave(&sc->lmc_lock, flags);
1433
1434 /* normal path, tbusy known to be zero */
1435
1436 entry = sc->lmc_next_tx % LMC_TXDESCS;
1437
1438 sc->lmc_txq[entry] = skb;
1439 sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1440
1441 LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1442
1443#ifndef GCOM
1444 /* If the queue is less than half full, don't interrupt */
1445 if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1446 {
1447 /* Do not interrupt on completion of this packet */
1448 flag = 0x60000000;
1449 netif_wake_queue(dev);
1450 }
1451 else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1452 {
1453 /* This generates an interrupt on completion of this packet */
1454 flag = 0xe0000000;
1455 netif_wake_queue(dev);
1456 }
1457 else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1458 {
1459 /* Do not interrupt on completion of this packet */
1460 flag = 0x60000000;
1461 netif_wake_queue(dev);
1462 }
1463 else
1464 {
1465 /* This generates an interrupt on completion of this packet */
1466 flag = 0xe0000000;
1467 sc->lmc_txfull = 1;
1468 netif_stop_queue(dev);
1469 }
1470#else
1471 flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1472
1473 if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1474 { /* ring full, go busy */
1475 sc->lmc_txfull = 1;
1476 netif_stop_queue(dev);
1477 sc->extra_stats.tx_tbusy1++;
1478 LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1479 }
1480#endif
1481
1482
1483 if (entry == LMC_TXDESCS - 1) /* last descriptor in ring */
1484 flag |= LMC_TDES_END_OF_RING; /* flag as such for Tulip */
1485
1486 /* don't pad small packets either */
1487 flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1488 sc->TxDescriptControlInit;
1489
1490 /* set the transmit timeout flag to be checked in
1491 * the watchdog timer handler. -baz
1492 */
1493
1494 sc->extra_stats.tx_NoCompleteCnt++;
1495 sc->lmc_next_tx++;
1496
1497 /* give ownership to the chip */
1498 LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1499 sc->lmc_txring[entry].status = 0x80000000;
1500
1501 /* send now! */
1502 LMC_CSR_WRITE (sc, csr_txpoll, 0);
1503
1504 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1505
1506 lmc_trace(dev, "lmc_start_xmit_out");
1507 return NETDEV_TX_OK;
1508}
1509
1510
1511static int lmc_rx(struct net_device *dev)
1512{
1513 lmc_softc_t *sc = dev_to_sc(dev);
1514 int i;
1515 int rx_work_limit = LMC_RXDESCS;
1516 unsigned int next_rx;
1517 int rxIntLoopCnt; /* debug -baz */
1518 int localLengthErrCnt = 0;
1519 long stat;
1520 struct sk_buff *skb, *nsb;
1521 u16 len;
1522
1523 lmc_trace(dev, "lmc_rx in");
1524
1525 lmc_led_on(sc, LMC_DS3_LED3);
1526
1527 rxIntLoopCnt = 0; /* debug -baz */
1528
1529 i = sc->lmc_next_rx % LMC_RXDESCS;
1530 next_rx = sc->lmc_next_rx;
1531
1532 while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4)
1533 {
1534 rxIntLoopCnt++; /* debug -baz */
1535 len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER);
1536 if ((stat & 0x0300) != 0x0300) { /* Check first segment and last segment */
1537 if ((stat & 0x0000ffff) != 0x7fff) {
1538 /* Oversized frame */
1539 sc->lmc_device->stats.rx_length_errors++;
1540 goto skip_packet;
1541 }
1542 }
1543
1544 if (stat & 0x00000008) { /* Catch a dribbling bit error */
1545 sc->lmc_device->stats.rx_errors++;
1546 sc->lmc_device->stats.rx_frame_errors++;
1547 goto skip_packet;
1548 }
1549
1550
1551 if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */
1552 sc->lmc_device->stats.rx_errors++;
1553 sc->lmc_device->stats.rx_crc_errors++;
1554 goto skip_packet;
1555 }
1556
1557 if (len > LMC_PKT_BUF_SZ) {
1558 sc->lmc_device->stats.rx_length_errors++;
1559 localLengthErrCnt++;
1560 goto skip_packet;
1561 }
1562
1563 if (len < sc->lmc_crcSize + 2) {
1564 sc->lmc_device->stats.rx_length_errors++;
1565 sc->extra_stats.rx_SmallPktCnt++;
1566 localLengthErrCnt++;
1567 goto skip_packet;
1568 }
1569
1570 if(stat & 0x00004000){
1571 printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name);
1572 }
1573
1574 len -= sc->lmc_crcSize;
1575
1576 skb = sc->lmc_rxq[i];
1577
1578 /*
1579 * We ran out of memory at some point
1580 * just allocate an skb buff and continue.
1581 */
1582
1583 if (!skb) {
1584 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1585 if (nsb) {
1586 sc->lmc_rxq[i] = nsb;
1587 nsb->dev = dev;
1588 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1589 }
1590 sc->failed_recv_alloc = 1;
1591 goto skip_packet;
1592 }
1593
1594 sc->lmc_device->stats.rx_packets++;
1595 sc->lmc_device->stats.rx_bytes += len;
1596
1597 LMC_CONSOLE_LOG("recv", skb->data, len);
1598
1599 /*
1600 * I'm not sure of the sanity of this
1601 * Packets could be arriving at a constant
1602 * 44.210mbits/sec and we're going to copy
1603 * them into a new buffer??
1604 */
1605
1606 if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1607 /*
1608 * If it's a large packet don't copy it just hand it up
1609 */
1610 give_it_anyways:
1611
1612 sc->lmc_rxq[i] = NULL;
1613 sc->lmc_rxring[i].buffer1 = 0x0;
1614
1615 skb_put (skb, len);
1616 skb->protocol = lmc_proto_type(sc, skb);
1617 skb_reset_mac_header(skb);
1618 /* skb_reset_network_header(skb); */
1619 skb->dev = dev;
1620 lmc_proto_netif(sc, skb);
1621
1622 /*
1623 * This skb will be destroyed by the upper layers, make a new one
1624 */
1625 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1626 if (nsb) {
1627 sc->lmc_rxq[i] = nsb;
1628 nsb->dev = dev;
1629 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1630 /* Transferred to 21140 below */
1631 }
1632 else {
1633 /*
1634 * We've run out of memory, stop trying to allocate
1635 * memory and exit the interrupt handler
1636 *
1637 * The chip may run out of receivers and stop
1638 * in which care we'll try to allocate the buffer
1639 * again. (once a second)
1640 */
1641 sc->extra_stats.rx_BuffAllocErr++;
1642 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1643 sc->failed_recv_alloc = 1;
1644 goto skip_out_of_mem;
1645 }
1646 }
1647 else {
1648 nsb = dev_alloc_skb(len);
1649 if(!nsb) {
1650 goto give_it_anyways;
1651 }
1652 skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1653
1654 nsb->protocol = lmc_proto_type(sc, nsb);
1655 skb_reset_mac_header(nsb);
1656 /* skb_reset_network_header(nsb); */
1657 nsb->dev = dev;
1658 lmc_proto_netif(sc, nsb);
1659 }
1660
1661 skip_packet:
1662 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1663 sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1664
1665 sc->lmc_next_rx++;
1666 i = sc->lmc_next_rx % LMC_RXDESCS;
1667 rx_work_limit--;
1668 if (rx_work_limit < 0)
1669 break;
1670 }
1671
1672 /* detect condition for LMC1000 where DSU cable attaches and fills
1673 * descriptors with bogus packets
1674 *
1675 if (localLengthErrCnt > LMC_RXDESCS - 3) {
1676 sc->extra_stats.rx_BadPktSurgeCnt++;
1677 LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1678 sc->extra_stats.rx_BadPktSurgeCnt);
1679 } */
1680
1681 /* save max count of receive descriptors serviced */
1682 if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1683 sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1684
1685#ifdef DEBUG
1686 if (rxIntLoopCnt == 0)
1687 {
1688 for (i = 0; i < LMC_RXDESCS; i++)
1689 {
1690 if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1691 != DESC_OWNED_BY_DC21X4)
1692 {
1693 rxIntLoopCnt++;
1694 }
1695 }
1696 LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1697 }
1698#endif
1699
1700
1701 lmc_led_off(sc, LMC_DS3_LED3);
1702
1703skip_out_of_mem:
1704
1705 lmc_trace(dev, "lmc_rx out");
1706
1707 return 0;
1708}
1709
1710static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1711{
1712 lmc_softc_t *sc = dev_to_sc(dev);
1713 unsigned long flags;
1714
1715 lmc_trace(dev, "lmc_get_stats in");
1716
1717 spin_lock_irqsave(&sc->lmc_lock, flags);
1718
1719 sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1720
1721 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1722
1723 lmc_trace(dev, "lmc_get_stats out");
1724
1725 return &sc->lmc_device->stats;
1726}
1727
1728static struct pci_driver lmc_driver = {
1729 .name = "lmc",
1730 .id_table = lmc_pci_tbl,
1731 .probe = lmc_init_one,
1732 .remove = lmc_remove_one,
1733};
1734
1735module_pci_driver(lmc_driver);
1736
1737unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1738{
1739 int i;
1740 int command = (0xf6 << 10) | (devaddr << 5) | regno;
1741 int retval = 0;
1742
1743 lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1744
1745 LMC_MII_SYNC (sc);
1746
1747 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1748
1749 for (i = 15; i >= 0; i--)
1750 {
1751 int dataval = (command & (1 << i)) ? 0x20000 : 0;
1752
1753 LMC_CSR_WRITE (sc, csr_9, dataval);
1754 lmc_delay ();
1755 /* __SLOW_DOWN_IO; */
1756 LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1757 lmc_delay ();
1758 /* __SLOW_DOWN_IO; */
1759 }
1760
1761 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1762
1763 for (i = 19; i > 0; i--)
1764 {
1765 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1766 lmc_delay ();
1767 /* __SLOW_DOWN_IO; */
1768 retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1769 LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1770 lmc_delay ();
1771 /* __SLOW_DOWN_IO; */
1772 }
1773
1774 lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1775
1776 return (retval >> 1) & 0xffff;
1777}
1778
1779void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1780{
1781 int i = 32;
1782 int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1783
1784 lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1785
1786 LMC_MII_SYNC (sc);
1787
1788 i = 31;
1789 while (i >= 0)
1790 {
1791 int datav;
1792
1793 if (command & (1 << i))
1794 datav = 0x20000;
1795 else
1796 datav = 0x00000;
1797
1798 LMC_CSR_WRITE (sc, csr_9, datav);
1799 lmc_delay ();
1800 /* __SLOW_DOWN_IO; */
1801 LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1802 lmc_delay ();
1803 /* __SLOW_DOWN_IO; */
1804 i--;
1805 }
1806
1807 i = 2;
1808 while (i > 0)
1809 {
1810 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1811 lmc_delay ();
1812 /* __SLOW_DOWN_IO; */
1813 LMC_CSR_WRITE (sc, csr_9, 0x50000);
1814 lmc_delay ();
1815 /* __SLOW_DOWN_IO; */
1816 i--;
1817 }
1818
1819 lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1820}
1821
1822static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1823{
1824 int i;
1825
1826 lmc_trace(sc->lmc_device, "lmc_softreset in");
1827
1828 /* Initialize the receive rings and buffers. */
1829 sc->lmc_txfull = 0;
1830 sc->lmc_next_rx = 0;
1831 sc->lmc_next_tx = 0;
1832 sc->lmc_taint_rx = 0;
1833 sc->lmc_taint_tx = 0;
1834
1835 /*
1836 * Setup each one of the receiver buffers
1837 * allocate an skbuff for each one, setup the descriptor table
1838 * and point each buffer at the next one
1839 */
1840
1841 for (i = 0; i < LMC_RXDESCS; i++)
1842 {
1843 struct sk_buff *skb;
1844
1845 if (sc->lmc_rxq[i] == NULL)
1846 {
1847 skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1848 if(skb == NULL){
1849 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1850 sc->failed_ring = 1;
1851 break;
1852 }
1853 else{
1854 sc->lmc_rxq[i] = skb;
1855 }
1856 }
1857 else
1858 {
1859 skb = sc->lmc_rxq[i];
1860 }
1861
1862 skb->dev = sc->lmc_device;
1863
1864 /* owned by 21140 */
1865 sc->lmc_rxring[i].status = 0x80000000;
1866
1867 /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1868 sc->lmc_rxring[i].length = skb_tailroom(skb);
1869
1870 /* use to be tail which is dumb since you're thinking why write
1871 * to the end of the packj,et but since there's nothing there tail == data
1872 */
1873 sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1874
1875 /* This is fair since the structure is static and we have the next address */
1876 sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1877
1878 }
1879
1880 /*
1881 * Sets end of ring
1882 */
1883 if (i != 0) {
1884 sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1885 sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
1886 }
1887 LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1888
1889 /* Initialize the transmit rings and buffers */
1890 for (i = 0; i < LMC_TXDESCS; i++)
1891 {
1892 if (sc->lmc_txq[i] != NULL){ /* have buffer */
1893 dev_kfree_skb(sc->lmc_txq[i]); /* free it */
1894 sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */
1895 }
1896 sc->lmc_txq[i] = NULL;
1897 sc->lmc_txring[i].status = 0x00000000;
1898 sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1899 }
1900 sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1901 LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1902
1903 lmc_trace(sc->lmc_device, "lmc_softreset out");
1904}
1905
1906void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1907{
1908 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1909 sc->lmc_gpio_io &= ~bits;
1910 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1911 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1912}
1913
1914void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1915{
1916 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1917 sc->lmc_gpio_io |= bits;
1918 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1919 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1920}
1921
1922void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1923{
1924 lmc_trace(sc->lmc_device, "lmc_led_on in");
1925 if((~sc->lmc_miireg16) & led){ /* Already on! */
1926 lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1927 return;
1928 }
1929
1930 sc->lmc_miireg16 &= ~led;
1931 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1932 lmc_trace(sc->lmc_device, "lmc_led_on out");
1933}
1934
1935void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1936{
1937 lmc_trace(sc->lmc_device, "lmc_led_off in");
1938 if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1939 lmc_trace(sc->lmc_device, "lmc_led_off aoff out");
1940 return;
1941 }
1942
1943 sc->lmc_miireg16 |= led;
1944 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1945 lmc_trace(sc->lmc_device, "lmc_led_off out");
1946}
1947
1948static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1949{
1950 lmc_trace(sc->lmc_device, "lmc_reset in");
1951 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1952 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1953
1954 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1955 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1956
1957 /*
1958 * make some of the GPIO pins be outputs
1959 */
1960 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1961
1962 /*
1963 * RESET low to force state reset. This also forces
1964 * the transmitter clock to be internal, but we expect to reset
1965 * that later anyway.
1966 */
1967 sc->lmc_gpio &= ~(LMC_GEP_RESET);
1968 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1969
1970 /*
1971 * hold for more than 10 microseconds
1972 */
1973 udelay(50);
1974
1975 /*
1976 * stop driving Xilinx-related signals
1977 */
1978 lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1979
1980 /*
1981 * Call media specific init routine
1982 */
1983 sc->lmc_media->init(sc);
1984
1985 sc->extra_stats.resetCount++;
1986 lmc_trace(sc->lmc_device, "lmc_reset out");
1987}
1988
1989static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
1990{
1991 u32 val;
1992 lmc_trace(sc->lmc_device, "lmc_dec_reset in");
1993
1994 /*
1995 * disable all interrupts
1996 */
1997 sc->lmc_intrmask = 0;
1998 LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
1999
2000 /*
2001 * Reset the chip with a software reset command.
2002 * Wait 10 microseconds (actually 50 PCI cycles but at
2003 * 33MHz that comes to two microseconds but wait a
2004 * bit longer anyways)
2005 */
2006 LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
2007 udelay(25);
2008#ifdef __sparc__
2009 sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
2010 sc->lmc_busmode = 0x00100000;
2011 sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
2012 LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
2013#endif
2014 sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
2015
2016 /*
2017 * We want:
2018 * no ethernet address in frames we write
2019 * disable padding (txdesc, padding disable)
2020 * ignore runt frames (rdes0 bit 15)
2021 * no receiver watchdog or transmitter jabber timer
2022 * (csr15 bit 0,14 == 1)
2023 * if using 16-bit CRC, turn off CRC (trans desc, crc disable)
2024 */
2025
2026 sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
2027 | TULIP_CMD_FULLDUPLEX
2028 | TULIP_CMD_PASSBADPKT
2029 | TULIP_CMD_NOHEARTBEAT
2030 | TULIP_CMD_PORTSELECT
2031 | TULIP_CMD_RECEIVEALL
2032 | TULIP_CMD_MUSTBEONE
2033 );
2034 sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2035 | TULIP_CMD_THRESHOLDCTL
2036 | TULIP_CMD_STOREFWD
2037 | TULIP_CMD_TXTHRSHLDCTL
2038 );
2039
2040 LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2041
2042 /*
2043 * disable receiver watchdog and transmit jabber
2044 */
2045 val = LMC_CSR_READ(sc, csr_sia_general);
2046 val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2047 LMC_CSR_WRITE(sc, csr_sia_general, val);
2048
2049 lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2050}
2051
2052static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2053 size_t csr_size)
2054{
2055 lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2056 sc->lmc_csrs.csr_busmode = csr_base + 0 * csr_size;
2057 sc->lmc_csrs.csr_txpoll = csr_base + 1 * csr_size;
2058 sc->lmc_csrs.csr_rxpoll = csr_base + 2 * csr_size;
2059 sc->lmc_csrs.csr_rxlist = csr_base + 3 * csr_size;
2060 sc->lmc_csrs.csr_txlist = csr_base + 4 * csr_size;
2061 sc->lmc_csrs.csr_status = csr_base + 5 * csr_size;
2062 sc->lmc_csrs.csr_command = csr_base + 6 * csr_size;
2063 sc->lmc_csrs.csr_intr = csr_base + 7 * csr_size;
2064 sc->lmc_csrs.csr_missed_frames = csr_base + 8 * csr_size;
2065 sc->lmc_csrs.csr_9 = csr_base + 9 * csr_size;
2066 sc->lmc_csrs.csr_10 = csr_base + 10 * csr_size;
2067 sc->lmc_csrs.csr_11 = csr_base + 11 * csr_size;
2068 sc->lmc_csrs.csr_12 = csr_base + 12 * csr_size;
2069 sc->lmc_csrs.csr_13 = csr_base + 13 * csr_size;
2070 sc->lmc_csrs.csr_14 = csr_base + 14 * csr_size;
2071 sc->lmc_csrs.csr_15 = csr_base + 15 * csr_size;
2072 lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2073}
2074
2075static void lmc_driver_timeout(struct net_device *dev)
2076{
2077 lmc_softc_t *sc = dev_to_sc(dev);
2078 u32 csr6;
2079 unsigned long flags;
2080
2081 lmc_trace(dev, "lmc_driver_timeout in");
2082
2083 spin_lock_irqsave(&sc->lmc_lock, flags);
2084
2085 printk("%s: Xmitter busy|\n", dev->name);
2086
2087 sc->extra_stats.tx_tbusy_calls++;
2088 if (jiffies - dev_trans_start(dev) < TX_TIMEOUT)
2089 goto bug_out;
2090
2091 /*
2092 * Chip seems to have locked up
2093 * Reset it
2094 * This whips out all our decriptor
2095 * table and starts from scartch
2096 */
2097
2098 LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2099 LMC_CSR_READ (sc, csr_status),
2100 sc->extra_stats.tx_ProcTimeout);
2101
2102 lmc_running_reset (dev);
2103
2104 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2105 LMC_EVENT_LOG(LMC_EVENT_RESET2,
2106 lmc_mii_readreg (sc, 0, 16),
2107 lmc_mii_readreg (sc, 0, 17));
2108
2109 /* restart the tx processes */
2110 csr6 = LMC_CSR_READ (sc, csr_command);
2111 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2112 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2113
2114 /* immediate transmit */
2115 LMC_CSR_WRITE (sc, csr_txpoll, 0);
2116
2117 sc->lmc_device->stats.tx_errors++;
2118 sc->extra_stats.tx_ProcTimeout++; /* -baz */
2119
2120 dev->trans_start = jiffies; /* prevent tx timeout */
2121
2122bug_out:
2123
2124 spin_unlock_irqrestore(&sc->lmc_lock, flags);
2125
2126 lmc_trace(dev, "lmc_driver_timeout out");
2127
2128
2129}