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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / wan / lmc / lmc_main.c
blob90a4ad9a2d081eb582570476a41a55f71e911dd6
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 <linux/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
77 static int LMC_PKT_BUF_SZ = 1542;
78
79 static const struct pci_device_id 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
87 MODULE_DEVICE_TABLE(pci, lmc_pci_tbl);
88 MODULE_LICENSE("GPL v2");
89
90
91 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
92 struct net_device *dev);
93 static int lmc_rx (struct net_device *dev);
94 static int lmc_open(struct net_device *dev);
95 static int lmc_close(struct net_device *dev);
96 static struct net_device_stats *lmc_get_stats(struct net_device *dev);
97 static irqreturn_t lmc_interrupt(int irq, void *dev_instance);
98 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size);
99 static void lmc_softreset(lmc_softc_t * const);
100 static void lmc_running_reset(struct net_device *dev);
101 static int lmc_ifdown(struct net_device * const);
102 static void lmc_watchdog(struct timer_list *t);
103 static void lmc_reset(lmc_softc_t * const sc);
104 static void lmc_dec_reset(lmc_softc_t * const sc);
105 static 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 */
111 int 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 = memdup_user(xc.data, xc.len);
498 if (IS_ERR(data)) {
499 ret = PTR_ERR(data);
500 break;
501 }
502
503 printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data);
504
505 spin_lock_irqsave(&sc->lmc_lock, flags);
506 lmc_gpio_mkinput(sc, 0xff);
507
508 /*
509 * Clear the Xilinx and start prgramming from the DEC
510 */
511
512 /*
513 * Set ouput as:
514 * Reset: 0 (active)
515 * DP: 0 (active)
516 * Mode: 1
517 *
518 */
519 sc->lmc_gpio = 0x00;
520 sc->lmc_gpio &= ~LMC_GEP_DP;
521 sc->lmc_gpio &= ~LMC_GEP_RESET;
522 sc->lmc_gpio |= LMC_GEP_MODE;
523 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
524
525 lmc_gpio_mkoutput(sc, LMC_GEP_MODE | LMC_GEP_DP | LMC_GEP_RESET);
526
527 /*
528 * Wait at least 10 us 20 to be safe
529 */
530 udelay(50);
531
532 /*
533 * Clear reset and activate programming lines
534 * Reset: Input
535 * DP: Input
536 * Clock: Output
537 * Data: Output
538 * Mode: Output
539 */
540 lmc_gpio_mkinput(sc, LMC_GEP_DP | LMC_GEP_RESET);
541
542 /*
543 * Set LOAD, DATA, Clock to 1
544 */
545 sc->lmc_gpio = 0x00;
546 sc->lmc_gpio |= LMC_GEP_MODE;
547 sc->lmc_gpio |= LMC_GEP_DATA;
548 sc->lmc_gpio |= LMC_GEP_CLK;
549 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
550
551 lmc_gpio_mkoutput(sc, LMC_GEP_DATA | LMC_GEP_CLK | LMC_GEP_MODE );
552
553 /*
554 * busy wait for the chip to reset
555 */
556 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
557 (timeout-- > 0))
558 cpu_relax();
559
560 printk(KERN_DEBUG "%s: Waited %d for the Xilinx to clear it's memory\n", dev->name, 500000-timeout);
561
562 for(pos = 0; pos < xc.len; pos++){
563 switch(data[pos]){
564 case 0:
565 sc->lmc_gpio &= ~LMC_GEP_DATA; /* Data is 0 */
566 break;
567 case 1:
568 sc->lmc_gpio |= LMC_GEP_DATA; /* Data is 1 */
569 break;
570 default:
571 printk(KERN_WARNING "%s Bad data in xilinx programming data at %d, got %d wanted 0 or 1\n", dev->name, pos, data[pos]);
572 sc->lmc_gpio |= LMC_GEP_DATA; /* Assume it's 1 */
573 }
574 sc->lmc_gpio &= ~LMC_GEP_CLK; /* Clock to zero */
575 sc->lmc_gpio |= LMC_GEP_MODE;
576 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
577 udelay(1);
578
579 sc->lmc_gpio |= LMC_GEP_CLK; /* Put the clack back to one */
580 sc->lmc_gpio |= LMC_GEP_MODE;
581 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
582 udelay(1);
583 }
584 if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0){
585 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (corrupted data)\n", dev->name);
586 }
587 else if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_DP) == 0){
588 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (done)\n", dev->name);
589 }
590 else {
591 printk(KERN_DEBUG "%s: Done reprogramming Xilinx, %d bits, good luck!\n", dev->name, pos);
592 }
593
594 lmc_gpio_mkinput(sc, 0xff);
595
596 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
597 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
598
599 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
600 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
601 spin_unlock_irqrestore(&sc->lmc_lock, flags);
602
603 kfree(data);
604
605 ret = 0;
606
607 break;
608 }
609 default: /*fold02*/
610 ret = -EBADE;
611 break;
612 }
613
614 netif_wake_queue(dev);
615 sc->lmc_txfull = 0;
616
617 }
618 break;
619 default: /*fold01*/
620 /* If we don't know what to do, give the protocol a shot. */
621 ret = lmc_proto_ioctl (sc, ifr, cmd);
622 break;
623 }
624
625 lmc_trace(dev, "lmc_ioctl out");
626
627 return ret;
628 }
629
630
631 /* the watchdog process that cruises around */
632 static void lmc_watchdog(struct timer_list *t) /*fold00*/
633 {
634 lmc_softc_t *sc = from_timer(sc, t, timer);
635 struct net_device *dev = sc->lmc_device;
636 int link_status;
637 u32 ticks;
638 unsigned long flags;
639
640 lmc_trace(dev, "lmc_watchdog in");
641
642 spin_lock_irqsave(&sc->lmc_lock, flags);
643
644 if(sc->check != 0xBEAFCAFE){
645 printk("LMC: Corrupt net_device struct, breaking out\n");
646 spin_unlock_irqrestore(&sc->lmc_lock, flags);
647 return;
648 }
649
650
651 /* Make sure the tx jabber and rx watchdog are off,
652 * and the transmit and receive processes are running.
653 */
654
655 LMC_CSR_WRITE (sc, csr_15, 0x00000011);
656 sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN;
657 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
658
659 if (sc->lmc_ok == 0)
660 goto kick_timer;
661
662 LMC_EVENT_LOG(LMC_EVENT_WATCHDOG, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
663
664 /* --- begin time out check -----------------------------------
665 * check for a transmit interrupt timeout
666 * Has the packet xmt vs xmt serviced threshold been exceeded */
667 if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
668 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
669 sc->tx_TimeoutInd == 0)
670 {
671
672 /* wait for the watchdog to come around again */
673 sc->tx_TimeoutInd = 1;
674 }
675 else if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
676 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
677 sc->tx_TimeoutInd)
678 {
679
680 LMC_EVENT_LOG(LMC_EVENT_XMTINTTMO, LMC_CSR_READ (sc, csr_status), 0);
681
682 sc->tx_TimeoutDisplay = 1;
683 sc->extra_stats.tx_TimeoutCnt++;
684
685 /* DEC chip is stuck, hit it with a RESET!!!! */
686 lmc_running_reset (dev);
687
688
689 /* look at receive & transmit process state to make sure they are running */
690 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
691
692 /* look at: DSR - 02 for Reg 16
693 * CTS - 08
694 * DCD - 10
695 * RI - 20
696 * for Reg 17
697 */
698 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17));
699
700 /* reset the transmit timeout detection flag */
701 sc->tx_TimeoutInd = 0;
702 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
703 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
704 } else {
705 sc->tx_TimeoutInd = 0;
706 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
707 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
708 }
709
710 /* --- end time out check ----------------------------------- */
711
712
713 link_status = sc->lmc_media->get_link_status (sc);
714
715 /*
716 * hardware level link lost, but the interface is marked as up.
717 * Mark it as down.
718 */
719 if ((link_status == 0) && (sc->last_link_status != 0)) {
720 printk(KERN_WARNING "%s: hardware/physical link down\n", dev->name);
721 sc->last_link_status = 0;
722 /* lmc_reset (sc); Why reset??? The link can go down ok */
723
724 /* Inform the world that link has been lost */
725 netif_carrier_off(dev);
726 }
727
728 /*
729 * hardware link is up, but the interface is marked as down.
730 * Bring it back up again.
731 */
732 if (link_status != 0 && sc->last_link_status == 0) {
733 printk(KERN_WARNING "%s: hardware/physical link up\n", dev->name);
734 sc->last_link_status = 1;
735 /* lmc_reset (sc); Again why reset??? */
736
737 netif_carrier_on(dev);
738 }
739
740 /* Call media specific watchdog functions */
741 sc->lmc_media->watchdog(sc);
742
743 /*
744 * Poke the transmitter to make sure it
745 * never stops, even if we run out of mem
746 */
747 LMC_CSR_WRITE(sc, csr_rxpoll, 0);
748
749 /*
750 * Check for code that failed
751 * and try and fix it as appropriate
752 */
753 if(sc->failed_ring == 1){
754 /*
755 * Failed to setup the recv/xmit rin
756 * Try again
757 */
758 sc->failed_ring = 0;
759 lmc_softreset(sc);
760 }
761 if(sc->failed_recv_alloc == 1){
762 /*
763 * We failed to alloc mem in the
764 * interrupt handler, go through the rings
765 * and rebuild them
766 */
767 sc->failed_recv_alloc = 0;
768 lmc_softreset(sc);
769 }
770
771
772 /*
773 * remember the timer value
774 */
775 kick_timer:
776
777 ticks = LMC_CSR_READ (sc, csr_gp_timer);
778 LMC_CSR_WRITE (sc, csr_gp_timer, 0xffffffffUL);
779 sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff);
780
781 /*
782 * restart this timer.
783 */
784 sc->timer.expires = jiffies + (HZ);
785 add_timer (&sc->timer);
786
787 spin_unlock_irqrestore(&sc->lmc_lock, flags);
788
789 lmc_trace(dev, "lmc_watchdog out");
790
791 }
792
793 static int lmc_attach(struct net_device *dev, unsigned short encoding,
794 unsigned short parity)
795 {
796 if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
797 return 0;
798 return -EINVAL;
799 }
800
801 static const struct net_device_ops lmc_ops = {
802 .ndo_open = lmc_open,
803 .ndo_stop = lmc_close,
804 .ndo_start_xmit = hdlc_start_xmit,
805 .ndo_do_ioctl = lmc_ioctl,
806 .ndo_tx_timeout = lmc_driver_timeout,
807 .ndo_get_stats = lmc_get_stats,
808 };
809
810 static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
811 {
812 lmc_softc_t *sc;
813 struct net_device *dev;
814 u16 subdevice;
815 u16 AdapModelNum;
816 int err;
817 static int cards_found;
818
819 /* lmc_trace(dev, "lmc_init_one in"); */
820
821 err = pcim_enable_device(pdev);
822 if (err) {
823 printk(KERN_ERR "lmc: pci enable failed: %d\n", err);
824 return err;
825 }
826
827 err = pci_request_regions(pdev, "lmc");
828 if (err) {
829 printk(KERN_ERR "lmc: pci_request_region failed\n");
830 return err;
831 }
832
833 /*
834 * Allocate our own device structure
835 */
836 sc = devm_kzalloc(&pdev->dev, sizeof(lmc_softc_t), GFP_KERNEL);
837 if (!sc)
838 return -ENOMEM;
839
840 dev = alloc_hdlcdev(sc);
841 if (!dev) {
842 printk(KERN_ERR "lmc:alloc_netdev for device failed\n");
843 return -ENOMEM;
844 }
845
846
847 dev->type = ARPHRD_HDLC;
848 dev_to_hdlc(dev)->xmit = lmc_start_xmit;
849 dev_to_hdlc(dev)->attach = lmc_attach;
850 dev->netdev_ops = &lmc_ops;
851 dev->watchdog_timeo = HZ; /* 1 second */
852 dev->tx_queue_len = 100;
853 sc->lmc_device = dev;
854 sc->name = dev->name;
855 sc->if_type = LMC_PPP;
856 sc->check = 0xBEAFCAFE;
857 dev->base_addr = pci_resource_start(pdev, 0);
858 dev->irq = pdev->irq;
859 pci_set_drvdata(pdev, dev);
860 SET_NETDEV_DEV(dev, &pdev->dev);
861
862 /*
863 * This will get the protocol layer ready and do any 1 time init's
864 * Must have a valid sc and dev structure
865 */
866 lmc_proto_attach(sc);
867
868 /* Init the spin lock so can call it latter */
869
870 spin_lock_init(&sc->lmc_lock);
871 pci_set_master(pdev);
872
873 printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name,
874 dev->base_addr, dev->irq);
875
876 err = register_hdlc_device(dev);
877 if (err) {
878 printk(KERN_ERR "%s: register_netdev failed.\n", dev->name);
879 free_netdev(dev);
880 return err;
881 }
882
883 sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN;
884 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
885
886 /*
887 *
888 * Check either the subvendor or the subdevice, some systems reverse
889 * the setting in the bois, seems to be version and arch dependent?
890 * Fix the error, exchange the two values
891 */
892 if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC)
893 subdevice = pdev->subsystem_vendor;
894
895 switch (subdevice) {
896 case PCI_DEVICE_ID_LMC_HSSI:
897 printk(KERN_INFO "%s: LMC HSSI\n", dev->name);
898 sc->lmc_cardtype = LMC_CARDTYPE_HSSI;
899 sc->lmc_media = &lmc_hssi_media;
900 break;
901 case PCI_DEVICE_ID_LMC_DS3:
902 printk(KERN_INFO "%s: LMC DS3\n", dev->name);
903 sc->lmc_cardtype = LMC_CARDTYPE_DS3;
904 sc->lmc_media = &lmc_ds3_media;
905 break;
906 case PCI_DEVICE_ID_LMC_SSI:
907 printk(KERN_INFO "%s: LMC SSI\n", dev->name);
908 sc->lmc_cardtype = LMC_CARDTYPE_SSI;
909 sc->lmc_media = &lmc_ssi_media;
910 break;
911 case PCI_DEVICE_ID_LMC_T1:
912 printk(KERN_INFO "%s: LMC T1\n", dev->name);
913 sc->lmc_cardtype = LMC_CARDTYPE_T1;
914 sc->lmc_media = &lmc_t1_media;
915 break;
916 default:
917 printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
918 break;
919 }
920
921 lmc_initcsrs (sc, dev->base_addr, 8);
922
923 lmc_gpio_mkinput (sc, 0xff);
924 sc->lmc_gpio = 0; /* drive no signals yet */
925
926 sc->lmc_media->defaults (sc);
927
928 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
929
930 /* verify that the PCI Sub System ID matches the Adapter Model number
931 * from the MII register
932 */
933 AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4;
934
935 if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */
936 subdevice != PCI_DEVICE_ID_LMC_T1) &&
937 (AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */
938 subdevice != PCI_DEVICE_ID_LMC_SSI) &&
939 (AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */
940 subdevice != PCI_DEVICE_ID_LMC_DS3) &&
941 (AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */
942 subdevice != PCI_DEVICE_ID_LMC_HSSI))
943 printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI"
944 " Subsystem ID = 0x%04x\n",
945 dev->name, AdapModelNum, subdevice);
946
947 /*
948 * reset clock
949 */
950 LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL);
951
952 sc->board_idx = cards_found++;
953 sc->extra_stats.check = STATCHECK;
954 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
955 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
956 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
957
958 sc->lmc_ok = 0;
959 sc->last_link_status = 0;
960
961 lmc_trace(dev, "lmc_init_one out");
962 return 0;
963 }
964
965 /*
966 * Called from pci when removing module.
967 */
968 static void lmc_remove_one(struct pci_dev *pdev)
969 {
970 struct net_device *dev = pci_get_drvdata(pdev);
971
972 if (dev) {
973 printk(KERN_DEBUG "%s: removing...\n", dev->name);
974 unregister_hdlc_device(dev);
975 free_netdev(dev);
976 }
977 }
978
979 /* After this is called, packets can be sent.
980 * Does not initialize the addresses
981 */
982 static int lmc_open(struct net_device *dev)
983 {
984 lmc_softc_t *sc = dev_to_sc(dev);
985 int err;
986
987 lmc_trace(dev, "lmc_open in");
988
989 lmc_led_on(sc, LMC_DS3_LED0);
990
991 lmc_dec_reset(sc);
992 lmc_reset(sc);
993
994 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0);
995 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16),
996 lmc_mii_readreg(sc, 0, 17));
997
998 if (sc->lmc_ok){
999 lmc_trace(dev, "lmc_open lmc_ok out");
1000 return 0;
1001 }
1002
1003 lmc_softreset (sc);
1004
1005 /* Since we have to use PCI bus, this should work on x86,alpha,ppc */
1006 if (request_irq (dev->irq, lmc_interrupt, IRQF_SHARED, dev->name, dev)){
1007 printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq);
1008 lmc_trace(dev, "lmc_open irq failed out");
1009 return -EAGAIN;
1010 }
1011 sc->got_irq = 1;
1012
1013 /* Assert Terminal Active */
1014 sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
1015 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
1016
1017 /*
1018 * reset to last state.
1019 */
1020 sc->lmc_media->set_status (sc, NULL);
1021
1022 /* setup default bits to be used in tulip_desc_t transmit descriptor
1023 * -baz */
1024 sc->TxDescriptControlInit = (
1025 LMC_TDES_INTERRUPT_ON_COMPLETION
1026 | LMC_TDES_FIRST_SEGMENT
1027 | LMC_TDES_LAST_SEGMENT
1028 | LMC_TDES_SECOND_ADDR_CHAINED
1029 | LMC_TDES_DISABLE_PADDING
1030 );
1031
1032 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) {
1033 /* disable 32 bit CRC generated by ASIC */
1034 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
1035 }
1036 sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length);
1037 /* Acknoledge the Terminal Active and light LEDs */
1038
1039 /* dev->flags |= IFF_UP; */
1040
1041 if ((err = lmc_proto_open(sc)) != 0)
1042 return err;
1043
1044 netif_start_queue(dev);
1045 sc->extra_stats.tx_tbusy0++;
1046
1047 /*
1048 * select what interrupts we want to get
1049 */
1050 sc->lmc_intrmask = 0;
1051 /* Should be using the default interrupt mask defined in the .h file. */
1052 sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
1053 | TULIP_STS_RXINTR
1054 | TULIP_STS_TXINTR
1055 | TULIP_STS_ABNRMLINTR
1056 | TULIP_STS_SYSERROR
1057 | TULIP_STS_TXSTOPPED
1058 | TULIP_STS_TXUNDERFLOW
1059 | TULIP_STS_RXSTOPPED
1060 | TULIP_STS_RXNOBUF
1061 );
1062 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1063
1064 sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
1065 sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
1066 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1067
1068 sc->lmc_ok = 1; /* Run watchdog */
1069
1070 /*
1071 * Set the if up now - pfb
1072 */
1073
1074 sc->last_link_status = 1;
1075
1076 /*
1077 * Setup a timer for the watchdog on probe, and start it running.
1078 * Since lmc_ok == 0, it will be a NOP for now.
1079 */
1080 timer_setup(&sc->timer, lmc_watchdog, 0);
1081 sc->timer.expires = jiffies + HZ;
1082 add_timer (&sc->timer);
1083
1084 lmc_trace(dev, "lmc_open out");
1085
1086 return 0;
1087 }
1088
1089 /* Total reset to compensate for the AdTran DSU doing bad things
1090 * under heavy load
1091 */
1092
1093 static void lmc_running_reset (struct net_device *dev) /*fold00*/
1094 {
1095 lmc_softc_t *sc = dev_to_sc(dev);
1096
1097 lmc_trace(dev, "lmc_running_reset in");
1098
1099 /* stop interrupts */
1100 /* Clear the interrupt mask */
1101 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1102
1103 lmc_dec_reset (sc);
1104 lmc_reset (sc);
1105 lmc_softreset (sc);
1106 /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */
1107 sc->lmc_media->set_link_status (sc, 1);
1108 sc->lmc_media->set_status (sc, NULL);
1109
1110 netif_wake_queue(dev);
1111
1112 sc->lmc_txfull = 0;
1113 sc->extra_stats.tx_tbusy0++;
1114
1115 sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK;
1116 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1117
1118 sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN);
1119 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1120
1121 lmc_trace(dev, "lmc_runnin_reset_out");
1122 }
1123
1124
1125 /* This is what is called when you ifconfig down a device.
1126 * This disables the timer for the watchdog and keepalives,
1127 * and disables the irq for dev.
1128 */
1129 static int lmc_close(struct net_device *dev)
1130 {
1131 /* not calling release_region() as we should */
1132 lmc_softc_t *sc = dev_to_sc(dev);
1133
1134 lmc_trace(dev, "lmc_close in");
1135
1136 sc->lmc_ok = 0;
1137 sc->lmc_media->set_link_status (sc, 0);
1138 del_timer (&sc->timer);
1139 lmc_proto_close(sc);
1140 lmc_ifdown (dev);
1141
1142 lmc_trace(dev, "lmc_close out");
1143
1144 return 0;
1145 }
1146
1147 /* Ends the transfer of packets */
1148 /* When the interface goes down, this is called */
1149 static int lmc_ifdown (struct net_device *dev) /*fold00*/
1150 {
1151 lmc_softc_t *sc = dev_to_sc(dev);
1152 u32 csr6;
1153 int i;
1154
1155 lmc_trace(dev, "lmc_ifdown in");
1156
1157 /* Don't let anything else go on right now */
1158 // dev->start = 0;
1159 netif_stop_queue(dev);
1160 sc->extra_stats.tx_tbusy1++;
1161
1162 /* stop interrupts */
1163 /* Clear the interrupt mask */
1164 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1165
1166 /* Stop Tx and Rx on the chip */
1167 csr6 = LMC_CSR_READ (sc, csr_command);
1168 csr6 &= ~LMC_DEC_ST; /* Turn off the Transmission bit */
1169 csr6 &= ~LMC_DEC_SR; /* Turn off the Receive bit */
1170 LMC_CSR_WRITE (sc, csr_command, csr6);
1171
1172 sc->lmc_device->stats.rx_missed_errors +=
1173 LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1174
1175 /* release the interrupt */
1176 if(sc->got_irq == 1){
1177 free_irq (dev->irq, dev);
1178 sc->got_irq = 0;
1179 }
1180
1181 /* free skbuffs in the Rx queue */
1182 for (i = 0; i < LMC_RXDESCS; i++)
1183 {
1184 struct sk_buff *skb = sc->lmc_rxq[i];
1185 sc->lmc_rxq[i] = NULL;
1186 sc->lmc_rxring[i].status = 0;
1187 sc->lmc_rxring[i].length = 0;
1188 sc->lmc_rxring[i].buffer1 = 0xDEADBEEF;
1189 if (skb != NULL)
1190 dev_kfree_skb(skb);
1191 sc->lmc_rxq[i] = NULL;
1192 }
1193
1194 for (i = 0; i < LMC_TXDESCS; i++)
1195 {
1196 if (sc->lmc_txq[i] != NULL)
1197 dev_kfree_skb(sc->lmc_txq[i]);
1198 sc->lmc_txq[i] = NULL;
1199 }
1200
1201 lmc_led_off (sc, LMC_MII16_LED_ALL);
1202
1203 netif_wake_queue(dev);
1204 sc->extra_stats.tx_tbusy0++;
1205
1206 lmc_trace(dev, "lmc_ifdown out");
1207
1208 return 0;
1209 }
1210
1211 /* Interrupt handling routine. This will take an incoming packet, or clean
1212 * up after a trasmit.
1213 */
1214 static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/
1215 {
1216 struct net_device *dev = (struct net_device *) dev_instance;
1217 lmc_softc_t *sc = dev_to_sc(dev);
1218 u32 csr;
1219 int i;
1220 s32 stat;
1221 unsigned int badtx;
1222 u32 firstcsr;
1223 int max_work = LMC_RXDESCS;
1224 int handled = 0;
1225
1226 lmc_trace(dev, "lmc_interrupt in");
1227
1228 spin_lock(&sc->lmc_lock);
1229
1230 /*
1231 * Read the csr to find what interrupts we have (if any)
1232 */
1233 csr = LMC_CSR_READ (sc, csr_status);
1234
1235 /*
1236 * Make sure this is our interrupt
1237 */
1238 if ( ! (csr & sc->lmc_intrmask)) {
1239 goto lmc_int_fail_out;
1240 }
1241
1242 firstcsr = csr;
1243
1244 /* always go through this loop at least once */
1245 while (csr & sc->lmc_intrmask) {
1246 handled = 1;
1247
1248 /*
1249 * Clear interrupt bits, we handle all case below
1250 */
1251 LMC_CSR_WRITE (sc, csr_status, csr);
1252
1253 /*
1254 * One of
1255 * - Transmit process timed out CSR5<1>
1256 * - Transmit jabber timeout CSR5<3>
1257 * - Transmit underflow CSR5<5>
1258 * - Transmit Receiver buffer unavailable CSR5<7>
1259 * - Receive process stopped CSR5<8>
1260 * - Receive watchdog timeout CSR5<9>
1261 * - Early transmit interrupt CSR5<10>
1262 *
1263 * Is this really right? Should we do a running reset for jabber?
1264 * (being a WAN card and all)
1265 */
1266 if (csr & TULIP_STS_ABNRMLINTR){
1267 lmc_running_reset (dev);
1268 break;
1269 }
1270
1271 if (csr & TULIP_STS_RXINTR){
1272 lmc_trace(dev, "rx interrupt");
1273 lmc_rx (dev);
1274
1275 }
1276 if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) {
1277
1278 int n_compl = 0 ;
1279 /* reset the transmit timeout detection flag -baz */
1280 sc->extra_stats.tx_NoCompleteCnt = 0;
1281
1282 badtx = sc->lmc_taint_tx;
1283 i = badtx % LMC_TXDESCS;
1284
1285 while ((badtx < sc->lmc_next_tx)) {
1286 stat = sc->lmc_txring[i].status;
1287
1288 LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat,
1289 sc->lmc_txring[i].length);
1290 /*
1291 * If bit 31 is 1 the tulip owns it break out of the loop
1292 */
1293 if (stat & 0x80000000)
1294 break;
1295
1296 n_compl++ ; /* i.e., have an empty slot in ring */
1297 /*
1298 * If we have no skbuff or have cleared it
1299 * Already continue to the next buffer
1300 */
1301 if (sc->lmc_txq[i] == NULL)
1302 continue;
1303
1304 /*
1305 * Check the total error summary to look for any errors
1306 */
1307 if (stat & 0x8000) {
1308 sc->lmc_device->stats.tx_errors++;
1309 if (stat & 0x4104)
1310 sc->lmc_device->stats.tx_aborted_errors++;
1311 if (stat & 0x0C00)
1312 sc->lmc_device->stats.tx_carrier_errors++;
1313 if (stat & 0x0200)
1314 sc->lmc_device->stats.tx_window_errors++;
1315 if (stat & 0x0002)
1316 sc->lmc_device->stats.tx_fifo_errors++;
1317 } else {
1318 sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff;
1319
1320 sc->lmc_device->stats.tx_packets++;
1321 }
1322
1323 // dev_kfree_skb(sc->lmc_txq[i]);
1324 dev_kfree_skb_irq(sc->lmc_txq[i]);
1325 sc->lmc_txq[i] = NULL;
1326
1327 badtx++;
1328 i = badtx % LMC_TXDESCS;
1329 }
1330
1331 if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1332 {
1333 printk ("%s: out of sync pointer\n", dev->name);
1334 badtx += LMC_TXDESCS;
1335 }
1336 LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1337 sc->lmc_txfull = 0;
1338 netif_wake_queue(dev);
1339 sc->extra_stats.tx_tbusy0++;
1340
1341
1342 #ifdef DEBUG
1343 sc->extra_stats.dirtyTx = badtx;
1344 sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1345 sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1346 #endif
1347 sc->lmc_taint_tx = badtx;
1348
1349 /*
1350 * Why was there a break here???
1351 */
1352 } /* end handle transmit interrupt */
1353
1354 if (csr & TULIP_STS_SYSERROR) {
1355 u32 error;
1356 printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1357 error = csr>>23 & 0x7;
1358 switch(error){
1359 case 0x000:
1360 printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1361 break;
1362 case 0x001:
1363 printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1364 break;
1365 case 0x010:
1366 printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1367 break;
1368 default:
1369 printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1370 }
1371 lmc_dec_reset (sc);
1372 lmc_reset (sc);
1373 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1374 LMC_EVENT_LOG(LMC_EVENT_RESET2,
1375 lmc_mii_readreg (sc, 0, 16),
1376 lmc_mii_readreg (sc, 0, 17));
1377
1378 }
1379
1380
1381 if(max_work-- <= 0)
1382 break;
1383
1384 /*
1385 * Get current csr status to make sure
1386 * we've cleared all interrupts
1387 */
1388 csr = LMC_CSR_READ (sc, csr_status);
1389 } /* end interrupt loop */
1390 LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1391
1392 lmc_int_fail_out:
1393
1394 spin_unlock(&sc->lmc_lock);
1395
1396 lmc_trace(dev, "lmc_interrupt out");
1397 return IRQ_RETVAL(handled);
1398 }
1399
1400 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
1401 struct net_device *dev)
1402 {
1403 lmc_softc_t *sc = dev_to_sc(dev);
1404 u32 flag;
1405 int entry;
1406 unsigned long flags;
1407
1408 lmc_trace(dev, "lmc_start_xmit in");
1409
1410 spin_lock_irqsave(&sc->lmc_lock, flags);
1411
1412 /* normal path, tbusy known to be zero */
1413
1414 entry = sc->lmc_next_tx % LMC_TXDESCS;
1415
1416 sc->lmc_txq[entry] = skb;
1417 sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1418
1419 LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1420
1421 #ifndef GCOM
1422 /* If the queue is less than half full, don't interrupt */
1423 if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1424 {
1425 /* Do not interrupt on completion of this packet */
1426 flag = 0x60000000;
1427 netif_wake_queue(dev);
1428 }
1429 else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1430 {
1431 /* This generates an interrupt on completion of this packet */
1432 flag = 0xe0000000;
1433 netif_wake_queue(dev);
1434 }
1435 else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1436 {
1437 /* Do not interrupt on completion of this packet */
1438 flag = 0x60000000;
1439 netif_wake_queue(dev);
1440 }
1441 else
1442 {
1443 /* This generates an interrupt on completion of this packet */
1444 flag = 0xe0000000;
1445 sc->lmc_txfull = 1;
1446 netif_stop_queue(dev);
1447 }
1448 #else
1449 flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1450
1451 if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1452 { /* ring full, go busy */
1453 sc->lmc_txfull = 1;
1454 netif_stop_queue(dev);
1455 sc->extra_stats.tx_tbusy1++;
1456 LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1457 }
1458 #endif
1459
1460
1461 if (entry == LMC_TXDESCS - 1) /* last descriptor in ring */
1462 flag |= LMC_TDES_END_OF_RING; /* flag as such for Tulip */
1463
1464 /* don't pad small packets either */
1465 flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1466 sc->TxDescriptControlInit;
1467
1468 /* set the transmit timeout flag to be checked in
1469 * the watchdog timer handler. -baz
1470 */
1471
1472 sc->extra_stats.tx_NoCompleteCnt++;
1473 sc->lmc_next_tx++;
1474
1475 /* give ownership to the chip */
1476 LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1477 sc->lmc_txring[entry].status = 0x80000000;
1478
1479 /* send now! */
1480 LMC_CSR_WRITE (sc, csr_txpoll, 0);
1481
1482 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1483
1484 lmc_trace(dev, "lmc_start_xmit_out");
1485 return NETDEV_TX_OK;
1486 }
1487
1488
1489 static int lmc_rx(struct net_device *dev)
1490 {
1491 lmc_softc_t *sc = dev_to_sc(dev);
1492 int i;
1493 int rx_work_limit = LMC_RXDESCS;
1494 unsigned int next_rx;
1495 int rxIntLoopCnt; /* debug -baz */
1496 int localLengthErrCnt = 0;
1497 long stat;
1498 struct sk_buff *skb, *nsb;
1499 u16 len;
1500
1501 lmc_trace(dev, "lmc_rx in");
1502
1503 lmc_led_on(sc, LMC_DS3_LED3);
1504
1505 rxIntLoopCnt = 0; /* debug -baz */
1506
1507 i = sc->lmc_next_rx % LMC_RXDESCS;
1508 next_rx = sc->lmc_next_rx;
1509
1510 while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4)
1511 {
1512 rxIntLoopCnt++; /* debug -baz */
1513 len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER);
1514 if ((stat & 0x0300) != 0x0300) { /* Check first segment and last segment */
1515 if ((stat & 0x0000ffff) != 0x7fff) {
1516 /* Oversized frame */
1517 sc->lmc_device->stats.rx_length_errors++;
1518 goto skip_packet;
1519 }
1520 }
1521
1522 if (stat & 0x00000008) { /* Catch a dribbling bit error */
1523 sc->lmc_device->stats.rx_errors++;
1524 sc->lmc_device->stats.rx_frame_errors++;
1525 goto skip_packet;
1526 }
1527
1528
1529 if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */
1530 sc->lmc_device->stats.rx_errors++;
1531 sc->lmc_device->stats.rx_crc_errors++;
1532 goto skip_packet;
1533 }
1534
1535 if (len > LMC_PKT_BUF_SZ) {
1536 sc->lmc_device->stats.rx_length_errors++;
1537 localLengthErrCnt++;
1538 goto skip_packet;
1539 }
1540
1541 if (len < sc->lmc_crcSize + 2) {
1542 sc->lmc_device->stats.rx_length_errors++;
1543 sc->extra_stats.rx_SmallPktCnt++;
1544 localLengthErrCnt++;
1545 goto skip_packet;
1546 }
1547
1548 if(stat & 0x00004000){
1549 printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name);
1550 }
1551
1552 len -= sc->lmc_crcSize;
1553
1554 skb = sc->lmc_rxq[i];
1555
1556 /*
1557 * We ran out of memory at some point
1558 * just allocate an skb buff and continue.
1559 */
1560
1561 if (!skb) {
1562 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1563 if (nsb) {
1564 sc->lmc_rxq[i] = nsb;
1565 nsb->dev = dev;
1566 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1567 }
1568 sc->failed_recv_alloc = 1;
1569 goto skip_packet;
1570 }
1571
1572 sc->lmc_device->stats.rx_packets++;
1573 sc->lmc_device->stats.rx_bytes += len;
1574
1575 LMC_CONSOLE_LOG("recv", skb->data, len);
1576
1577 /*
1578 * I'm not sure of the sanity of this
1579 * Packets could be arriving at a constant
1580 * 44.210mbits/sec and we're going to copy
1581 * them into a new buffer??
1582 */
1583
1584 if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1585 /*
1586 * If it's a large packet don't copy it just hand it up
1587 */
1588 give_it_anyways:
1589
1590 sc->lmc_rxq[i] = NULL;
1591 sc->lmc_rxring[i].buffer1 = 0x0;
1592
1593 skb_put (skb, len);
1594 skb->protocol = lmc_proto_type(sc, skb);
1595 skb_reset_mac_header(skb);
1596 /* skb_reset_network_header(skb); */
1597 skb->dev = dev;
1598 lmc_proto_netif(sc, skb);
1599
1600 /*
1601 * This skb will be destroyed by the upper layers, make a new one
1602 */
1603 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1604 if (nsb) {
1605 sc->lmc_rxq[i] = nsb;
1606 nsb->dev = dev;
1607 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1608 /* Transferred to 21140 below */
1609 }
1610 else {
1611 /*
1612 * We've run out of memory, stop trying to allocate
1613 * memory and exit the interrupt handler
1614 *
1615 * The chip may run out of receivers and stop
1616 * in which care we'll try to allocate the buffer
1617 * again. (once a second)
1618 */
1619 sc->extra_stats.rx_BuffAllocErr++;
1620 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1621 sc->failed_recv_alloc = 1;
1622 goto skip_out_of_mem;
1623 }
1624 }
1625 else {
1626 nsb = dev_alloc_skb(len);
1627 if(!nsb) {
1628 goto give_it_anyways;
1629 }
1630 skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1631
1632 nsb->protocol = lmc_proto_type(sc, nsb);
1633 skb_reset_mac_header(nsb);
1634 /* skb_reset_network_header(nsb); */
1635 nsb->dev = dev;
1636 lmc_proto_netif(sc, nsb);
1637 }
1638
1639 skip_packet:
1640 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1641 sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1642
1643 sc->lmc_next_rx++;
1644 i = sc->lmc_next_rx % LMC_RXDESCS;
1645 rx_work_limit--;
1646 if (rx_work_limit < 0)
1647 break;
1648 }
1649
1650 /* detect condition for LMC1000 where DSU cable attaches and fills
1651 * descriptors with bogus packets
1652 *
1653 if (localLengthErrCnt > LMC_RXDESCS - 3) {
1654 sc->extra_stats.rx_BadPktSurgeCnt++;
1655 LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1656 sc->extra_stats.rx_BadPktSurgeCnt);
1657 } */
1658
1659 /* save max count of receive descriptors serviced */
1660 if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1661 sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1662
1663 #ifdef DEBUG
1664 if (rxIntLoopCnt == 0)
1665 {
1666 for (i = 0; i < LMC_RXDESCS; i++)
1667 {
1668 if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1669 != DESC_OWNED_BY_DC21X4)
1670 {
1671 rxIntLoopCnt++;
1672 }
1673 }
1674 LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1675 }
1676 #endif
1677
1678
1679 lmc_led_off(sc, LMC_DS3_LED3);
1680
1681 skip_out_of_mem:
1682
1683 lmc_trace(dev, "lmc_rx out");
1684
1685 return 0;
1686 }
1687
1688 static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1689 {
1690 lmc_softc_t *sc = dev_to_sc(dev);
1691 unsigned long flags;
1692
1693 lmc_trace(dev, "lmc_get_stats in");
1694
1695 spin_lock_irqsave(&sc->lmc_lock, flags);
1696
1697 sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1698
1699 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1700
1701 lmc_trace(dev, "lmc_get_stats out");
1702
1703 return &sc->lmc_device->stats;
1704 }
1705
1706 static struct pci_driver lmc_driver = {
1707 .name = "lmc",
1708 .id_table = lmc_pci_tbl,
1709 .probe = lmc_init_one,
1710 .remove = lmc_remove_one,
1711 };
1712
1713 module_pci_driver(lmc_driver);
1714
1715 unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1716 {
1717 int i;
1718 int command = (0xf6 << 10) | (devaddr << 5) | regno;
1719 int retval = 0;
1720
1721 lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1722
1723 LMC_MII_SYNC (sc);
1724
1725 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1726
1727 for (i = 15; i >= 0; i--)
1728 {
1729 int dataval = (command & (1 << i)) ? 0x20000 : 0;
1730
1731 LMC_CSR_WRITE (sc, csr_9, dataval);
1732 lmc_delay ();
1733 /* __SLOW_DOWN_IO; */
1734 LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1735 lmc_delay ();
1736 /* __SLOW_DOWN_IO; */
1737 }
1738
1739 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1740
1741 for (i = 19; i > 0; i--)
1742 {
1743 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1744 lmc_delay ();
1745 /* __SLOW_DOWN_IO; */
1746 retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1747 LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1748 lmc_delay ();
1749 /* __SLOW_DOWN_IO; */
1750 }
1751
1752 lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1753
1754 return (retval >> 1) & 0xffff;
1755 }
1756
1757 void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1758 {
1759 int i = 32;
1760 int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1761
1762 lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1763
1764 LMC_MII_SYNC (sc);
1765
1766 i = 31;
1767 while (i >= 0)
1768 {
1769 int datav;
1770
1771 if (command & (1 << i))
1772 datav = 0x20000;
1773 else
1774 datav = 0x00000;
1775
1776 LMC_CSR_WRITE (sc, csr_9, datav);
1777 lmc_delay ();
1778 /* __SLOW_DOWN_IO; */
1779 LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1780 lmc_delay ();
1781 /* __SLOW_DOWN_IO; */
1782 i--;
1783 }
1784
1785 i = 2;
1786 while (i > 0)
1787 {
1788 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1789 lmc_delay ();
1790 /* __SLOW_DOWN_IO; */
1791 LMC_CSR_WRITE (sc, csr_9, 0x50000);
1792 lmc_delay ();
1793 /* __SLOW_DOWN_IO; */
1794 i--;
1795 }
1796
1797 lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1798 }
1799
1800 static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1801 {
1802 int i;
1803
1804 lmc_trace(sc->lmc_device, "lmc_softreset in");
1805
1806 /* Initialize the receive rings and buffers. */
1807 sc->lmc_txfull = 0;
1808 sc->lmc_next_rx = 0;
1809 sc->lmc_next_tx = 0;
1810 sc->lmc_taint_rx = 0;
1811 sc->lmc_taint_tx = 0;
1812
1813 /*
1814 * Setup each one of the receiver buffers
1815 * allocate an skbuff for each one, setup the descriptor table
1816 * and point each buffer at the next one
1817 */
1818
1819 for (i = 0; i < LMC_RXDESCS; i++)
1820 {
1821 struct sk_buff *skb;
1822
1823 if (sc->lmc_rxq[i] == NULL)
1824 {
1825 skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1826 if(skb == NULL){
1827 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1828 sc->failed_ring = 1;
1829 break;
1830 }
1831 else{
1832 sc->lmc_rxq[i] = skb;
1833 }
1834 }
1835 else
1836 {
1837 skb = sc->lmc_rxq[i];
1838 }
1839
1840 skb->dev = sc->lmc_device;
1841
1842 /* owned by 21140 */
1843 sc->lmc_rxring[i].status = 0x80000000;
1844
1845 /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1846 sc->lmc_rxring[i].length = skb_tailroom(skb);
1847
1848 /* use to be tail which is dumb since you're thinking why write
1849 * to the end of the packj,et but since there's nothing there tail == data
1850 */
1851 sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1852
1853 /* This is fair since the structure is static and we have the next address */
1854 sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1855
1856 }
1857
1858 /*
1859 * Sets end of ring
1860 */
1861 if (i != 0) {
1862 sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1863 sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
1864 }
1865 LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1866
1867 /* Initialize the transmit rings and buffers */
1868 for (i = 0; i < LMC_TXDESCS; i++)
1869 {
1870 if (sc->lmc_txq[i] != NULL){ /* have buffer */
1871 dev_kfree_skb(sc->lmc_txq[i]); /* free it */
1872 sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */
1873 }
1874 sc->lmc_txq[i] = NULL;
1875 sc->lmc_txring[i].status = 0x00000000;
1876 sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1877 }
1878 sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1879 LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1880
1881 lmc_trace(sc->lmc_device, "lmc_softreset out");
1882 }
1883
1884 void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1885 {
1886 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1887 sc->lmc_gpio_io &= ~bits;
1888 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1889 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1890 }
1891
1892 void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1893 {
1894 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1895 sc->lmc_gpio_io |= bits;
1896 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1897 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1898 }
1899
1900 void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1901 {
1902 lmc_trace(sc->lmc_device, "lmc_led_on in");
1903 if((~sc->lmc_miireg16) & led){ /* Already on! */
1904 lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1905 return;
1906 }
1907
1908 sc->lmc_miireg16 &= ~led;
1909 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1910 lmc_trace(sc->lmc_device, "lmc_led_on out");
1911 }
1912
1913 void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1914 {
1915 lmc_trace(sc->lmc_device, "lmc_led_off in");
1916 if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1917 lmc_trace(sc->lmc_device, "lmc_led_off aoff out");
1918 return;
1919 }
1920
1921 sc->lmc_miireg16 |= led;
1922 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1923 lmc_trace(sc->lmc_device, "lmc_led_off out");
1924 }
1925
1926 static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1927 {
1928 lmc_trace(sc->lmc_device, "lmc_reset in");
1929 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1930 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1931
1932 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1933 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1934
1935 /*
1936 * make some of the GPIO pins be outputs
1937 */
1938 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1939
1940 /*
1941 * RESET low to force state reset. This also forces
1942 * the transmitter clock to be internal, but we expect to reset
1943 * that later anyway.
1944 */
1945 sc->lmc_gpio &= ~(LMC_GEP_RESET);
1946 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1947
1948 /*
1949 * hold for more than 10 microseconds
1950 */
1951 udelay(50);
1952
1953 /*
1954 * stop driving Xilinx-related signals
1955 */
1956 lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1957
1958 /*
1959 * Call media specific init routine
1960 */
1961 sc->lmc_media->init(sc);
1962
1963 sc->extra_stats.resetCount++;
1964 lmc_trace(sc->lmc_device, "lmc_reset out");
1965 }
1966
1967 static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
1968 {
1969 u32 val;
1970 lmc_trace(sc->lmc_device, "lmc_dec_reset in");
1971
1972 /*
1973 * disable all interrupts
1974 */
1975 sc->lmc_intrmask = 0;
1976 LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
1977
1978 /*
1979 * Reset the chip with a software reset command.
1980 * Wait 10 microseconds (actually 50 PCI cycles but at
1981 * 33MHz that comes to two microseconds but wait a
1982 * bit longer anyways)
1983 */
1984 LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
1985 udelay(25);
1986 #ifdef __sparc__
1987 sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
1988 sc->lmc_busmode = 0x00100000;
1989 sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
1990 LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
1991 #endif
1992 sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
1993
1994 /*
1995 * We want:
1996 * no ethernet address in frames we write
1997 * disable padding (txdesc, padding disable)
1998 * ignore runt frames (rdes0 bit 15)
1999 * no receiver watchdog or transmitter jabber timer
2000 * (csr15 bit 0,14 == 1)
2001 * if using 16-bit CRC, turn off CRC (trans desc, crc disable)
2002 */
2003
2004 sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
2005 | TULIP_CMD_FULLDUPLEX
2006 | TULIP_CMD_PASSBADPKT
2007 | TULIP_CMD_NOHEARTBEAT
2008 | TULIP_CMD_PORTSELECT
2009 | TULIP_CMD_RECEIVEALL
2010 | TULIP_CMD_MUSTBEONE
2011 );
2012 sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2013 | TULIP_CMD_THRESHOLDCTL
2014 | TULIP_CMD_STOREFWD
2015 | TULIP_CMD_TXTHRSHLDCTL
2016 );
2017
2018 LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2019
2020 /*
2021 * disable receiver watchdog and transmit jabber
2022 */
2023 val = LMC_CSR_READ(sc, csr_sia_general);
2024 val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2025 LMC_CSR_WRITE(sc, csr_sia_general, val);
2026
2027 lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2028 }
2029
2030 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2031 size_t csr_size)
2032 {
2033 lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2034 sc->lmc_csrs.csr_busmode = csr_base + 0 * csr_size;
2035 sc->lmc_csrs.csr_txpoll = csr_base + 1 * csr_size;
2036 sc->lmc_csrs.csr_rxpoll = csr_base + 2 * csr_size;
2037 sc->lmc_csrs.csr_rxlist = csr_base + 3 * csr_size;
2038 sc->lmc_csrs.csr_txlist = csr_base + 4 * csr_size;
2039 sc->lmc_csrs.csr_status = csr_base + 5 * csr_size;
2040 sc->lmc_csrs.csr_command = csr_base + 6 * csr_size;
2041 sc->lmc_csrs.csr_intr = csr_base + 7 * csr_size;
2042 sc->lmc_csrs.csr_missed_frames = csr_base + 8 * csr_size;
2043 sc->lmc_csrs.csr_9 = csr_base + 9 * csr_size;
2044 sc->lmc_csrs.csr_10 = csr_base + 10 * csr_size;
2045 sc->lmc_csrs.csr_11 = csr_base + 11 * csr_size;
2046 sc->lmc_csrs.csr_12 = csr_base + 12 * csr_size;
2047 sc->lmc_csrs.csr_13 = csr_base + 13 * csr_size;
2048 sc->lmc_csrs.csr_14 = csr_base + 14 * csr_size;
2049 sc->lmc_csrs.csr_15 = csr_base + 15 * csr_size;
2050 lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2051 }
2052
2053 static void lmc_driver_timeout(struct net_device *dev)
2054 {
2055 lmc_softc_t *sc = dev_to_sc(dev);
2056 u32 csr6;
2057 unsigned long flags;
2058
2059 lmc_trace(dev, "lmc_driver_timeout in");
2060
2061 spin_lock_irqsave(&sc->lmc_lock, flags);
2062
2063 printk("%s: Xmitter busy|\n", dev->name);
2064
2065 sc->extra_stats.tx_tbusy_calls++;
2066 if (jiffies - dev_trans_start(dev) < TX_TIMEOUT)
2067 goto bug_out;
2068
2069 /*
2070 * Chip seems to have locked up
2071 * Reset it
2072 * This whips out all our decriptor
2073 * table and starts from scartch
2074 */
2075
2076 LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2077 LMC_CSR_READ (sc, csr_status),
2078 sc->extra_stats.tx_ProcTimeout);
2079
2080 lmc_running_reset (dev);
2081
2082 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2083 LMC_EVENT_LOG(LMC_EVENT_RESET2,
2084 lmc_mii_readreg (sc, 0, 16),
2085 lmc_mii_readreg (sc, 0, 17));
2086
2087 /* restart the tx processes */
2088 csr6 = LMC_CSR_READ (sc, csr_command);
2089 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2090 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2091
2092 /* immediate transmit */
2093 LMC_CSR_WRITE (sc, csr_txpoll, 0);
2094
2095 sc->lmc_device->stats.tx_errors++;
2096 sc->extra_stats.tx_ProcTimeout++; /* -baz */
2097
2098 netif_trans_update(dev); /* prevent tx timeout */
2099
2100 bug_out:
2101
2102 spin_unlock_irqrestore(&sc->lmc_lock, flags);
2103
2104 lmc_trace(dev, "lmc_driver_timeout out");
2105
2106
2107 }
CRIS linux kernel tree