Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/net/wan/lmc/lmc_main.c

  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(unsigned long data);
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 = 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 */
639 static 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      */
782 kick_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 
800 static 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 
808 static const struct net_device_ops lmc_ops = {
809         .ndo_open       = lmc_open,
810         .ndo_stop       = lmc_close,
811         .ndo_start_xmit = hdlc_start_xmit,
812         .ndo_do_ioctl   = lmc_ioctl,
813         .ndo_tx_timeout = lmc_driver_timeout,
814         .ndo_get_stats  = lmc_get_stats,
815 };
816 
817 static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
818 {
819         lmc_softc_t *sc;
820         struct net_device *dev;
821         u16 subdevice;
822         u16 AdapModelNum;
823         int err;
824         static int cards_found;
825 
826         /* lmc_trace(dev, "lmc_init_one in"); */
827 
828         err = pcim_enable_device(pdev);
829         if (err) {
830                 printk(KERN_ERR "lmc: pci enable failed: %d\n", err);
831                 return err;
832         }
833 
834         err = pci_request_regions(pdev, "lmc");
835         if (err) {
836                 printk(KERN_ERR "lmc: pci_request_region failed\n");
837                 return err;
838         }
839 
840         /*
841          * Allocate our own device structure
842          */
843         sc = devm_kzalloc(&pdev->dev, sizeof(lmc_softc_t), GFP_KERNEL);
844         if (!sc)
845                 return -ENOMEM;
846 
847         dev = alloc_hdlcdev(sc);
848         if (!dev) {
849                 printk(KERN_ERR "lmc:alloc_netdev for device failed\n");
850                 return -ENOMEM;
851         }
852 
853 
854         dev->type = ARPHRD_HDLC;
855         dev_to_hdlc(dev)->xmit = lmc_start_xmit;
856         dev_to_hdlc(dev)->attach = lmc_attach;
857         dev->netdev_ops = &lmc_ops;
858         dev->watchdog_timeo = HZ; /* 1 second */
859         dev->tx_queue_len = 100;
860         sc->lmc_device = dev;
861         sc->name = dev->name;
862         sc->if_type = LMC_PPP;
863         sc->check = 0xBEAFCAFE;
864         dev->base_addr = pci_resource_start(pdev, 0);
865         dev->irq = pdev->irq;
866         pci_set_drvdata(pdev, dev);
867         SET_NETDEV_DEV(dev, &pdev->dev);
868 
869         /*
870          * This will get the protocol layer ready and do any 1 time init's
871          * Must have a valid sc and dev structure
872          */
873         lmc_proto_attach(sc);
874 
875         /* Init the spin lock so can call it latter */
876 
877         spin_lock_init(&sc->lmc_lock);
878         pci_set_master(pdev);
879 
880         printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name,
881                dev->base_addr, dev->irq);
882 
883         err = register_hdlc_device(dev);
884         if (err) {
885                 printk(KERN_ERR "%s: register_netdev failed.\n", dev->name);
886                 free_netdev(dev);
887                 return err;
888         }
889 
890     sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN;
891     sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
892 
893     /*
894      *
895      * Check either the subvendor or the subdevice, some systems reverse
896      * the setting in the bois, seems to be version and arch dependent?
897      * Fix the error, exchange the two values 
898      */
899     if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC)
900             subdevice = pdev->subsystem_vendor;
901 
902     switch (subdevice) {
903     case PCI_DEVICE_ID_LMC_HSSI:
904         printk(KERN_INFO "%s: LMC HSSI\n", dev->name);
905         sc->lmc_cardtype = LMC_CARDTYPE_HSSI;
906         sc->lmc_media = &lmc_hssi_media;
907         break;
908     case PCI_DEVICE_ID_LMC_DS3:
909         printk(KERN_INFO "%s: LMC DS3\n", dev->name);
910         sc->lmc_cardtype = LMC_CARDTYPE_DS3;
911         sc->lmc_media = &lmc_ds3_media;
912         break;
913     case PCI_DEVICE_ID_LMC_SSI:
914         printk(KERN_INFO "%s: LMC SSI\n", dev->name);
915         sc->lmc_cardtype = LMC_CARDTYPE_SSI;
916         sc->lmc_media = &lmc_ssi_media;
917         break;
918     case PCI_DEVICE_ID_LMC_T1:
919         printk(KERN_INFO "%s: LMC T1\n", dev->name);
920         sc->lmc_cardtype = LMC_CARDTYPE_T1;
921         sc->lmc_media = &lmc_t1_media;
922         break;
923     default:
924         printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
925         break;
926     }
927 
928     lmc_initcsrs (sc, dev->base_addr, 8);
929 
930     lmc_gpio_mkinput (sc, 0xff);
931     sc->lmc_gpio = 0;           /* drive no signals yet */
932 
933     sc->lmc_media->defaults (sc);
934 
935     sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
936 
937     /* verify that the PCI Sub System ID matches the Adapter Model number
938      * from the MII register
939      */
940     AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4;
941 
942     if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */
943          subdevice != PCI_DEVICE_ID_LMC_T1) &&
944         (AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */
945          subdevice != PCI_DEVICE_ID_LMC_SSI) &&
946         (AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */
947          subdevice != PCI_DEVICE_ID_LMC_DS3) &&
948         (AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */
949          subdevice != PCI_DEVICE_ID_LMC_HSSI))
950             printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI"
951                    " Subsystem ID = 0x%04x\n",
952                    dev->name, AdapModelNum, subdevice);
953 
954     /*
955      * reset clock
956      */
957     LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL);
958 
959     sc->board_idx = cards_found++;
960     sc->extra_stats.check = STATCHECK;
961     sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
962             sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
963     sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
964 
965     sc->lmc_ok = 0;
966     sc->last_link_status = 0;
967 
968     lmc_trace(dev, "lmc_init_one out");
969     return 0;
970 }
971 
972 /*
973  * Called from pci when removing module.
974  */
975 static void lmc_remove_one(struct pci_dev *pdev)
976 {
977         struct net_device *dev = pci_get_drvdata(pdev);
978 
979         if (dev) {
980                 printk(KERN_DEBUG "%s: removing...\n", dev->name);
981                 unregister_hdlc_device(dev);
982                 free_netdev(dev);
983         }
984 }
985 
986 /* After this is called, packets can be sent.
987  * Does not initialize the addresses
988  */
989 static int lmc_open(struct net_device *dev)
990 {
991     lmc_softc_t *sc = dev_to_sc(dev);
992     int err;
993 
994     lmc_trace(dev, "lmc_open in");
995 
996     lmc_led_on(sc, LMC_DS3_LED0);
997 
998     lmc_dec_reset(sc);
999     lmc_reset(sc);
1000 
1001     LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0);
1002     LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16),
1003                   lmc_mii_readreg(sc, 0, 17));
1004 
1005     if (sc->lmc_ok){
1006         lmc_trace(dev, "lmc_open lmc_ok out");
1007         return 0;
1008     }
1009 
1010     lmc_softreset (sc);
1011 
1012     /* Since we have to use PCI bus, this should work on x86,alpha,ppc */
1013     if (request_irq (dev->irq, lmc_interrupt, IRQF_SHARED, dev->name, dev)){
1014         printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq);
1015         lmc_trace(dev, "lmc_open irq failed out");
1016         return -EAGAIN;
1017     }
1018     sc->got_irq = 1;
1019 
1020     /* Assert Terminal Active */
1021     sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
1022     sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
1023 
1024     /*
1025      * reset to last state.
1026      */
1027     sc->lmc_media->set_status (sc, NULL);
1028 
1029     /* setup default bits to be used in tulip_desc_t transmit descriptor
1030      * -baz */
1031     sc->TxDescriptControlInit = (
1032                                  LMC_TDES_INTERRUPT_ON_COMPLETION
1033                                  | LMC_TDES_FIRST_SEGMENT
1034                                  | LMC_TDES_LAST_SEGMENT
1035                                  | LMC_TDES_SECOND_ADDR_CHAINED
1036                                  | LMC_TDES_DISABLE_PADDING
1037                                 );
1038 
1039     if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) {
1040         /* disable 32 bit CRC generated by ASIC */
1041         sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
1042     }
1043     sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length);
1044     /* Acknoledge the Terminal Active and light LEDs */
1045 
1046     /* dev->flags |= IFF_UP; */
1047 
1048     if ((err = lmc_proto_open(sc)) != 0)
1049             return err;
1050 
1051     netif_start_queue(dev);
1052     sc->extra_stats.tx_tbusy0++;
1053 
1054     /*
1055      * select what interrupts we want to get
1056      */
1057     sc->lmc_intrmask = 0;
1058     /* Should be using the default interrupt mask defined in the .h file. */
1059     sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
1060                          | TULIP_STS_RXINTR
1061                          | TULIP_STS_TXINTR
1062                          | TULIP_STS_ABNRMLINTR
1063                          | TULIP_STS_SYSERROR
1064                          | TULIP_STS_TXSTOPPED
1065                          | TULIP_STS_TXUNDERFLOW
1066                          | TULIP_STS_RXSTOPPED
1067                          | TULIP_STS_RXNOBUF
1068                         );
1069     LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1070 
1071     sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
1072     sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
1073     LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1074 
1075     sc->lmc_ok = 1; /* Run watchdog */
1076 
1077     /*
1078      * Set the if up now - pfb
1079      */
1080 
1081     sc->last_link_status = 1;
1082 
1083     /*
1084      * Setup a timer for the watchdog on probe, and start it running.
1085      * Since lmc_ok == 0, it will be a NOP for now.
1086      */
1087     init_timer (&sc->timer);
1088     sc->timer.expires = jiffies + HZ;
1089     sc->timer.data = (unsigned long) dev;
1090     sc->timer.function = lmc_watchdog;
1091     add_timer (&sc->timer);
1092 
1093     lmc_trace(dev, "lmc_open out");
1094 
1095     return 0;
1096 }
1097 
1098 /* Total reset to compensate for the AdTran DSU doing bad things
1099  *  under heavy load
1100  */
1101 
1102 static void lmc_running_reset (struct net_device *dev) /*fold00*/
1103 {
1104     lmc_softc_t *sc = dev_to_sc(dev);
1105 
1106     lmc_trace(dev, "lmc_running_reset in");
1107 
1108     /* stop interrupts */
1109     /* Clear the interrupt mask */
1110     LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1111 
1112     lmc_dec_reset (sc);
1113     lmc_reset (sc);
1114     lmc_softreset (sc);
1115     /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */
1116     sc->lmc_media->set_link_status (sc, 1);
1117     sc->lmc_media->set_status (sc, NULL);
1118 
1119     netif_wake_queue(dev);
1120 
1121     sc->lmc_txfull = 0;
1122     sc->extra_stats.tx_tbusy0++;
1123 
1124     sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK;
1125     LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1126 
1127     sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN);
1128     LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1129 
1130     lmc_trace(dev, "lmc_runnin_reset_out");
1131 }
1132 
1133 
1134 /* This is what is called when you ifconfig down a device.
1135  * This disables the timer for the watchdog and keepalives,
1136  * and disables the irq for dev.
1137  */
1138 static int lmc_close(struct net_device *dev)
1139 {
1140     /* not calling release_region() as we should */
1141     lmc_softc_t *sc = dev_to_sc(dev);
1142 
1143     lmc_trace(dev, "lmc_close in");
1144 
1145     sc->lmc_ok = 0;
1146     sc->lmc_media->set_link_status (sc, 0);
1147     del_timer (&sc->timer);
1148     lmc_proto_close(sc);
1149     lmc_ifdown (dev);
1150 
1151     lmc_trace(dev, "lmc_close out");
1152 
1153     return 0;
1154 }
1155 
1156 /* Ends the transfer of packets */
1157 /* When the interface goes down, this is called */
1158 static int lmc_ifdown (struct net_device *dev) /*fold00*/
1159 {
1160     lmc_softc_t *sc = dev_to_sc(dev);
1161     u32 csr6;
1162     int i;
1163 
1164     lmc_trace(dev, "lmc_ifdown in");
1165 
1166     /* Don't let anything else go on right now */
1167     //    dev->start = 0;
1168     netif_stop_queue(dev);
1169     sc->extra_stats.tx_tbusy1++;
1170 
1171     /* stop interrupts */
1172     /* Clear the interrupt mask */
1173     LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1174 
1175     /* Stop Tx and Rx on the chip */
1176     csr6 = LMC_CSR_READ (sc, csr_command);
1177     csr6 &= ~LMC_DEC_ST;                /* Turn off the Transmission bit */
1178     csr6 &= ~LMC_DEC_SR;                /* Turn off the Receive bit */
1179     LMC_CSR_WRITE (sc, csr_command, csr6);
1180 
1181     sc->lmc_device->stats.rx_missed_errors +=
1182             LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1183 
1184     /* release the interrupt */
1185     if(sc->got_irq == 1){
1186         free_irq (dev->irq, dev);
1187         sc->got_irq = 0;
1188     }
1189 
1190     /* free skbuffs in the Rx queue */
1191     for (i = 0; i < LMC_RXDESCS; i++)
1192     {
1193         struct sk_buff *skb = sc->lmc_rxq[i];
1194         sc->lmc_rxq[i] = NULL;
1195         sc->lmc_rxring[i].status = 0;
1196         sc->lmc_rxring[i].length = 0;
1197         sc->lmc_rxring[i].buffer1 = 0xDEADBEEF;
1198         if (skb != NULL)
1199             dev_kfree_skb(skb);
1200         sc->lmc_rxq[i] = NULL;
1201     }
1202 
1203     for (i = 0; i < LMC_TXDESCS; i++)
1204     {
1205         if (sc->lmc_txq[i] != NULL)
1206             dev_kfree_skb(sc->lmc_txq[i]);
1207         sc->lmc_txq[i] = NULL;
1208     }
1209 
1210     lmc_led_off (sc, LMC_MII16_LED_ALL);
1211 
1212     netif_wake_queue(dev);
1213     sc->extra_stats.tx_tbusy0++;
1214 
1215     lmc_trace(dev, "lmc_ifdown out");
1216 
1217     return 0;
1218 }
1219 
1220 /* Interrupt handling routine.  This will take an incoming packet, or clean
1221  * up after a trasmit.
1222  */
1223 static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/
1224 {
1225     struct net_device *dev = (struct net_device *) dev_instance;
1226     lmc_softc_t *sc = dev_to_sc(dev);
1227     u32 csr;
1228     int i;
1229     s32 stat;
1230     unsigned int badtx;
1231     u32 firstcsr;
1232     int max_work = LMC_RXDESCS;
1233     int handled = 0;
1234 
1235     lmc_trace(dev, "lmc_interrupt in");
1236 
1237     spin_lock(&sc->lmc_lock);
1238 
1239     /*
1240      * Read the csr to find what interrupts we have (if any)
1241      */
1242     csr = LMC_CSR_READ (sc, csr_status);
1243 
1244     /*
1245      * Make sure this is our interrupt
1246      */
1247     if ( ! (csr & sc->lmc_intrmask)) {
1248         goto lmc_int_fail_out;
1249     }
1250 
1251     firstcsr = csr;
1252 
1253     /* always go through this loop at least once */
1254     while (csr & sc->lmc_intrmask) {
1255         handled = 1;
1256 
1257         /*
1258          * Clear interrupt bits, we handle all case below
1259          */
1260         LMC_CSR_WRITE (sc, csr_status, csr);
1261 
1262         /*
1263          * One of
1264          *  - Transmit process timed out CSR5<1>
1265          *  - Transmit jabber timeout    CSR5<3>
1266          *  - Transmit underflow         CSR5<5>
1267          *  - Transmit Receiver buffer unavailable CSR5<7>
1268          *  - Receive process stopped    CSR5<8>
1269          *  - Receive watchdog timeout   CSR5<9>
1270          *  - Early transmit interrupt   CSR5<10>
1271          *
1272          * Is this really right? Should we do a running reset for jabber?
1273          * (being a WAN card and all)
1274          */
1275         if (csr & TULIP_STS_ABNRMLINTR){
1276             lmc_running_reset (dev);
1277             break;
1278         }
1279         
1280         if (csr & TULIP_STS_RXINTR){
1281             lmc_trace(dev, "rx interrupt");
1282             lmc_rx (dev);
1283             
1284         }
1285         if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) {
1286 
1287             int         n_compl = 0 ;
1288             /* reset the transmit timeout detection flag -baz */
1289             sc->extra_stats.tx_NoCompleteCnt = 0;
1290 
1291             badtx = sc->lmc_taint_tx;
1292             i = badtx % LMC_TXDESCS;
1293 
1294             while ((badtx < sc->lmc_next_tx)) {
1295                 stat = sc->lmc_txring[i].status;
1296 
1297                 LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat,
1298                                                  sc->lmc_txring[i].length);
1299                 /*
1300                  * If bit 31 is 1 the tulip owns it break out of the loop
1301                  */
1302                 if (stat & 0x80000000)
1303                     break;
1304 
1305                 n_compl++ ;             /* i.e., have an empty slot in ring */
1306                 /*
1307                  * If we have no skbuff or have cleared it
1308                  * Already continue to the next buffer
1309                  */
1310                 if (sc->lmc_txq[i] == NULL)
1311                     continue;
1312 
1313                 /*
1314                  * Check the total error summary to look for any errors
1315                  */
1316                 if (stat & 0x8000) {
1317                         sc->lmc_device->stats.tx_errors++;
1318                         if (stat & 0x4104)
1319                                 sc->lmc_device->stats.tx_aborted_errors++;
1320                         if (stat & 0x0C00)
1321                                 sc->lmc_device->stats.tx_carrier_errors++;
1322                         if (stat & 0x0200)
1323                                 sc->lmc_device->stats.tx_window_errors++;
1324                         if (stat & 0x0002)
1325                                 sc->lmc_device->stats.tx_fifo_errors++;
1326                 } else {
1327                         sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff;
1328 
1329                         sc->lmc_device->stats.tx_packets++;
1330                 }
1331 
1332                 //                dev_kfree_skb(sc->lmc_txq[i]);
1333                 dev_kfree_skb_irq(sc->lmc_txq[i]);
1334                 sc->lmc_txq[i] = NULL;
1335 
1336                 badtx++;
1337                 i = badtx % LMC_TXDESCS;
1338             }
1339 
1340             if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1341             {
1342                 printk ("%s: out of sync pointer\n", dev->name);
1343                 badtx += LMC_TXDESCS;
1344             }
1345             LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1346             sc->lmc_txfull = 0;
1347             netif_wake_queue(dev);
1348             sc->extra_stats.tx_tbusy0++;
1349 
1350 
1351 #ifdef DEBUG
1352             sc->extra_stats.dirtyTx = badtx;
1353             sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1354             sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1355 #endif
1356             sc->lmc_taint_tx = badtx;
1357 
1358             /*
1359              * Why was there a break here???
1360              */
1361         }                       /* end handle transmit interrupt */
1362 
1363         if (csr & TULIP_STS_SYSERROR) {
1364             u32 error;
1365             printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1366             error = csr>>23 & 0x7;
1367             switch(error){
1368             case 0x000:
1369                 printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1370                 break;
1371             case 0x001:
1372                 printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1373                 break;
1374             case 0x010:
1375                 printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1376                 break;
1377             default:
1378                 printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1379             }
1380             lmc_dec_reset (sc);
1381             lmc_reset (sc);
1382             LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1383             LMC_EVENT_LOG(LMC_EVENT_RESET2,
1384                           lmc_mii_readreg (sc, 0, 16),
1385                           lmc_mii_readreg (sc, 0, 17));
1386 
1387         }
1388 
1389         
1390         if(max_work-- <= 0)
1391             break;
1392         
1393         /*
1394          * Get current csr status to make sure
1395          * we've cleared all interrupts
1396          */
1397         csr = LMC_CSR_READ (sc, csr_status);
1398     }                           /* end interrupt loop */
1399     LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1400 
1401 lmc_int_fail_out:
1402 
1403     spin_unlock(&sc->lmc_lock);
1404 
1405     lmc_trace(dev, "lmc_interrupt out");
1406     return IRQ_RETVAL(handled);
1407 }
1408 
1409 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
1410                                         struct net_device *dev)
1411 {
1412     lmc_softc_t *sc = dev_to_sc(dev);
1413     u32 flag;
1414     int entry;
1415     unsigned long flags;
1416 
1417     lmc_trace(dev, "lmc_start_xmit in");
1418 
1419     spin_lock_irqsave(&sc->lmc_lock, flags);
1420 
1421     /* normal path, tbusy known to be zero */
1422 
1423     entry = sc->lmc_next_tx % LMC_TXDESCS;
1424 
1425     sc->lmc_txq[entry] = skb;
1426     sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1427 
1428     LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1429 
1430 #ifndef GCOM
1431     /* If the queue is less than half full, don't interrupt */
1432     if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1433     {
1434         /* Do not interrupt on completion of this packet */
1435         flag = 0x60000000;
1436         netif_wake_queue(dev);
1437     }
1438     else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1439     {
1440         /* This generates an interrupt on completion of this packet */
1441         flag = 0xe0000000;
1442         netif_wake_queue(dev);
1443     }
1444     else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1445     {
1446         /* Do not interrupt on completion of this packet */
1447         flag = 0x60000000;
1448         netif_wake_queue(dev);
1449     }
1450     else
1451     {
1452         /* This generates an interrupt on completion of this packet */
1453         flag = 0xe0000000;
1454         sc->lmc_txfull = 1;
1455         netif_stop_queue(dev);
1456     }
1457 #else
1458     flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1459 
1460     if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1461     {                           /* ring full, go busy */
1462         sc->lmc_txfull = 1;
1463         netif_stop_queue(dev);
1464         sc->extra_stats.tx_tbusy1++;
1465         LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1466     }
1467 #endif
1468 
1469 
1470     if (entry == LMC_TXDESCS - 1)       /* last descriptor in ring */
1471         flag |= LMC_TDES_END_OF_RING;   /* flag as such for Tulip */
1472 
1473     /* don't pad small packets either */
1474     flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1475                                                 sc->TxDescriptControlInit;
1476 
1477     /* set the transmit timeout flag to be checked in
1478      * the watchdog timer handler. -baz
1479      */
1480 
1481     sc->extra_stats.tx_NoCompleteCnt++;
1482     sc->lmc_next_tx++;
1483 
1484     /* give ownership to the chip */
1485     LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1486     sc->lmc_txring[entry].status = 0x80000000;
1487 
1488     /* send now! */
1489     LMC_CSR_WRITE (sc, csr_txpoll, 0);
1490 
1491     spin_unlock_irqrestore(&sc->lmc_lock, flags);
1492 
1493     lmc_trace(dev, "lmc_start_xmit_out");
1494     return NETDEV_TX_OK;
1495 }
1496 
1497 
1498 static int lmc_rx(struct net_device *dev)
1499 {
1500     lmc_softc_t *sc = dev_to_sc(dev);
1501     int i;
1502     int rx_work_limit = LMC_RXDESCS;
1503     unsigned int next_rx;
1504     int rxIntLoopCnt;           /* debug -baz */
1505     int localLengthErrCnt = 0;
1506     long stat;
1507     struct sk_buff *skb, *nsb;
1508     u16 len;
1509 
1510     lmc_trace(dev, "lmc_rx in");
1511 
1512     lmc_led_on(sc, LMC_DS3_LED3);
1513 
1514     rxIntLoopCnt = 0;           /* debug -baz */
1515 
1516     i = sc->lmc_next_rx % LMC_RXDESCS;
1517     next_rx = sc->lmc_next_rx;
1518 
1519     while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4)
1520     {
1521         rxIntLoopCnt++;         /* debug -baz */
1522         len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER);
1523         if ((stat & 0x0300) != 0x0300) {  /* Check first segment and last segment */
1524                 if ((stat & 0x0000ffff) != 0x7fff) {
1525                         /* Oversized frame */
1526                         sc->lmc_device->stats.rx_length_errors++;
1527                         goto skip_packet;
1528                 }
1529         }
1530 
1531         if (stat & 0x00000008) { /* Catch a dribbling bit error */
1532                 sc->lmc_device->stats.rx_errors++;
1533                 sc->lmc_device->stats.rx_frame_errors++;
1534                 goto skip_packet;
1535         }
1536 
1537 
1538         if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */
1539                 sc->lmc_device->stats.rx_errors++;
1540                 sc->lmc_device->stats.rx_crc_errors++;
1541                 goto skip_packet;
1542         }
1543 
1544         if (len > LMC_PKT_BUF_SZ) {
1545                 sc->lmc_device->stats.rx_length_errors++;
1546                 localLengthErrCnt++;
1547                 goto skip_packet;
1548         }
1549 
1550         if (len < sc->lmc_crcSize + 2) {
1551                 sc->lmc_device->stats.rx_length_errors++;
1552                 sc->extra_stats.rx_SmallPktCnt++;
1553                 localLengthErrCnt++;
1554                 goto skip_packet;
1555         }
1556 
1557         if(stat & 0x00004000){
1558             printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name);
1559         }
1560 
1561         len -= sc->lmc_crcSize;
1562 
1563         skb = sc->lmc_rxq[i];
1564 
1565         /*
1566          * We ran out of memory at some point
1567          * just allocate an skb buff and continue.
1568          */
1569         
1570         if (!skb) {
1571             nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1572             if (nsb) {
1573                 sc->lmc_rxq[i] = nsb;
1574                 nsb->dev = dev;
1575                 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1576             }
1577             sc->failed_recv_alloc = 1;
1578             goto skip_packet;
1579         }
1580         
1581         sc->lmc_device->stats.rx_packets++;
1582         sc->lmc_device->stats.rx_bytes += len;
1583 
1584         LMC_CONSOLE_LOG("recv", skb->data, len);
1585 
1586         /*
1587          * I'm not sure of the sanity of this
1588          * Packets could be arriving at a constant
1589          * 44.210mbits/sec and we're going to copy
1590          * them into a new buffer??
1591          */
1592         
1593         if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1594             /*
1595              * If it's a large packet don't copy it just hand it up
1596              */
1597         give_it_anyways:
1598 
1599             sc->lmc_rxq[i] = NULL;
1600             sc->lmc_rxring[i].buffer1 = 0x0;
1601 
1602             skb_put (skb, len);
1603             skb->protocol = lmc_proto_type(sc, skb);
1604             skb_reset_mac_header(skb);
1605             /* skb_reset_network_header(skb); */
1606             skb->dev = dev;
1607             lmc_proto_netif(sc, skb);
1608 
1609             /*
1610              * This skb will be destroyed by the upper layers, make a new one
1611              */
1612             nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1613             if (nsb) {
1614                 sc->lmc_rxq[i] = nsb;
1615                 nsb->dev = dev;
1616                 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1617                 /* Transferred to 21140 below */
1618             }
1619             else {
1620                 /*
1621                  * We've run out of memory, stop trying to allocate
1622                  * memory and exit the interrupt handler
1623                  *
1624                  * The chip may run out of receivers and stop
1625                  * in which care we'll try to allocate the buffer
1626                  * again.  (once a second)
1627                  */
1628                 sc->extra_stats.rx_BuffAllocErr++;
1629                 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1630                 sc->failed_recv_alloc = 1;
1631                 goto skip_out_of_mem;
1632             }
1633         }
1634         else {
1635             nsb = dev_alloc_skb(len);
1636             if(!nsb) {
1637                 goto give_it_anyways;
1638             }
1639             skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1640             
1641             nsb->protocol = lmc_proto_type(sc, nsb);
1642             skb_reset_mac_header(nsb);
1643             /* skb_reset_network_header(nsb); */
1644             nsb->dev = dev;
1645             lmc_proto_netif(sc, nsb);
1646         }
1647 
1648     skip_packet:
1649         LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1650         sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1651 
1652         sc->lmc_next_rx++;
1653         i = sc->lmc_next_rx % LMC_RXDESCS;
1654         rx_work_limit--;
1655         if (rx_work_limit < 0)
1656             break;
1657     }
1658 
1659     /* detect condition for LMC1000 where DSU cable attaches and fills
1660      * descriptors with bogus packets
1661      *
1662     if (localLengthErrCnt > LMC_RXDESCS - 3) {
1663         sc->extra_stats.rx_BadPktSurgeCnt++;
1664         LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1665                       sc->extra_stats.rx_BadPktSurgeCnt);
1666     } */
1667 
1668     /* save max count of receive descriptors serviced */
1669     if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1670             sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1671 
1672 #ifdef DEBUG
1673     if (rxIntLoopCnt == 0)
1674     {
1675         for (i = 0; i < LMC_RXDESCS; i++)
1676         {
1677             if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1678                 != DESC_OWNED_BY_DC21X4)
1679             {
1680                 rxIntLoopCnt++;
1681             }
1682         }
1683         LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1684     }
1685 #endif
1686 
1687 
1688     lmc_led_off(sc, LMC_DS3_LED3);
1689 
1690 skip_out_of_mem:
1691 
1692     lmc_trace(dev, "lmc_rx out");
1693 
1694     return 0;
1695 }
1696 
1697 static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1698 {
1699     lmc_softc_t *sc = dev_to_sc(dev);
1700     unsigned long flags;
1701 
1702     lmc_trace(dev, "lmc_get_stats in");
1703 
1704     spin_lock_irqsave(&sc->lmc_lock, flags);
1705 
1706     sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1707 
1708     spin_unlock_irqrestore(&sc->lmc_lock, flags);
1709 
1710     lmc_trace(dev, "lmc_get_stats out");
1711 
1712     return &sc->lmc_device->stats;
1713 }
1714 
1715 static struct pci_driver lmc_driver = {
1716         .name           = "lmc",
1717         .id_table       = lmc_pci_tbl,
1718         .probe          = lmc_init_one,
1719         .remove         = lmc_remove_one,
1720 };
1721 
1722 module_pci_driver(lmc_driver);
1723 
1724 unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1725 {
1726     int i;
1727     int command = (0xf6 << 10) | (devaddr << 5) | regno;
1728     int retval = 0;
1729 
1730     lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1731 
1732     LMC_MII_SYNC (sc);
1733 
1734     lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1735 
1736     for (i = 15; i >= 0; i--)
1737     {
1738         int dataval = (command & (1 << i)) ? 0x20000 : 0;
1739 
1740         LMC_CSR_WRITE (sc, csr_9, dataval);
1741         lmc_delay ();
1742         /* __SLOW_DOWN_IO; */
1743         LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1744         lmc_delay ();
1745         /* __SLOW_DOWN_IO; */
1746     }
1747 
1748     lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1749 
1750     for (i = 19; i > 0; i--)
1751     {
1752         LMC_CSR_WRITE (sc, csr_9, 0x40000);
1753         lmc_delay ();
1754         /* __SLOW_DOWN_IO; */
1755         retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1756         LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1757         lmc_delay ();
1758         /* __SLOW_DOWN_IO; */
1759     }
1760 
1761     lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1762 
1763     return (retval >> 1) & 0xffff;
1764 }
1765 
1766 void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1767 {
1768     int i = 32;
1769     int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1770 
1771     lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1772 
1773     LMC_MII_SYNC (sc);
1774 
1775     i = 31;
1776     while (i >= 0)
1777     {
1778         int datav;
1779 
1780         if (command & (1 << i))
1781             datav = 0x20000;
1782         else
1783             datav = 0x00000;
1784 
1785         LMC_CSR_WRITE (sc, csr_9, datav);
1786         lmc_delay ();
1787         /* __SLOW_DOWN_IO; */
1788         LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1789         lmc_delay ();
1790         /* __SLOW_DOWN_IO; */
1791         i--;
1792     }
1793 
1794     i = 2;
1795     while (i > 0)
1796     {
1797         LMC_CSR_WRITE (sc, csr_9, 0x40000);
1798         lmc_delay ();
1799         /* __SLOW_DOWN_IO; */
1800         LMC_CSR_WRITE (sc, csr_9, 0x50000);
1801         lmc_delay ();
1802         /* __SLOW_DOWN_IO; */
1803         i--;
1804     }
1805 
1806     lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1807 }
1808 
1809 static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1810 {
1811     int i;
1812 
1813     lmc_trace(sc->lmc_device, "lmc_softreset in");
1814 
1815     /* Initialize the receive rings and buffers. */
1816     sc->lmc_txfull = 0;
1817     sc->lmc_next_rx = 0;
1818     sc->lmc_next_tx = 0;
1819     sc->lmc_taint_rx = 0;
1820     sc->lmc_taint_tx = 0;
1821 
1822     /*
1823      * Setup each one of the receiver buffers
1824      * allocate an skbuff for each one, setup the descriptor table
1825      * and point each buffer at the next one
1826      */
1827 
1828     for (i = 0; i < LMC_RXDESCS; i++)
1829     {
1830         struct sk_buff *skb;
1831 
1832         if (sc->lmc_rxq[i] == NULL)
1833         {
1834             skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1835             if(skb == NULL){
1836                 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1837                 sc->failed_ring = 1;
1838                 break;
1839             }
1840             else{
1841                 sc->lmc_rxq[i] = skb;
1842             }
1843         }
1844         else
1845         {
1846             skb = sc->lmc_rxq[i];
1847         }
1848 
1849         skb->dev = sc->lmc_device;
1850 
1851         /* owned by 21140 */
1852         sc->lmc_rxring[i].status = 0x80000000;
1853 
1854         /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1855         sc->lmc_rxring[i].length = skb_tailroom(skb);
1856 
1857         /* use to be tail which is dumb since you're thinking why write
1858          * to the end of the packj,et but since there's nothing there tail == data
1859          */
1860         sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1861 
1862         /* This is fair since the structure is static and we have the next address */
1863         sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1864 
1865     }
1866 
1867     /*
1868      * Sets end of ring
1869      */
1870     if (i != 0) {
1871         sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1872         sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
1873     }
1874     LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1875 
1876     /* Initialize the transmit rings and buffers */
1877     for (i = 0; i < LMC_TXDESCS; i++)
1878     {
1879         if (sc->lmc_txq[i] != NULL){            /* have buffer */
1880             dev_kfree_skb(sc->lmc_txq[i]);      /* free it */
1881             sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */
1882         }
1883         sc->lmc_txq[i] = NULL;
1884         sc->lmc_txring[i].status = 0x00000000;
1885         sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1886     }
1887     sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1888     LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1889 
1890     lmc_trace(sc->lmc_device, "lmc_softreset out");
1891 }
1892 
1893 void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1894 {
1895     lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1896     sc->lmc_gpio_io &= ~bits;
1897     LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1898     lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1899 }
1900 
1901 void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1902 {
1903     lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1904     sc->lmc_gpio_io |= bits;
1905     LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1906     lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1907 }
1908 
1909 void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1910 {
1911     lmc_trace(sc->lmc_device, "lmc_led_on in");
1912     if((~sc->lmc_miireg16) & led){ /* Already on! */
1913         lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1914         return;
1915     }
1916     
1917     sc->lmc_miireg16 &= ~led;
1918     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1919     lmc_trace(sc->lmc_device, "lmc_led_on out");
1920 }
1921 
1922 void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1923 {
1924     lmc_trace(sc->lmc_device, "lmc_led_off in");
1925     if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1926         lmc_trace(sc->lmc_device, "lmc_led_off aoff 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_off out");
1933 }
1934 
1935 static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1936 {
1937     lmc_trace(sc->lmc_device, "lmc_reset in");
1938     sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1939     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1940 
1941     sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1942     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1943 
1944     /*
1945      * make some of the GPIO pins be outputs
1946      */
1947     lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1948 
1949     /*
1950      * RESET low to force state reset.  This also forces
1951      * the transmitter clock to be internal, but we expect to reset
1952      * that later anyway.
1953      */
1954     sc->lmc_gpio &= ~(LMC_GEP_RESET);
1955     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1956 
1957     /*
1958      * hold for more than 10 microseconds
1959      */
1960     udelay(50);
1961 
1962     /*
1963      * stop driving Xilinx-related signals
1964      */
1965     lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1966 
1967     /*
1968      * Call media specific init routine
1969      */
1970     sc->lmc_media->init(sc);
1971 
1972     sc->extra_stats.resetCount++;
1973     lmc_trace(sc->lmc_device, "lmc_reset out");
1974 }
1975 
1976 static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
1977 {
1978     u32 val;
1979     lmc_trace(sc->lmc_device, "lmc_dec_reset in");
1980 
1981     /*
1982      * disable all interrupts
1983      */
1984     sc->lmc_intrmask = 0;
1985     LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
1986 
1987     /*
1988      * Reset the chip with a software reset command.
1989      * Wait 10 microseconds (actually 50 PCI cycles but at
1990      * 33MHz that comes to two microseconds but wait a
1991      * bit longer anyways)
1992      */
1993     LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
1994     udelay(25);
1995 #ifdef __sparc__
1996     sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
1997     sc->lmc_busmode = 0x00100000;
1998     sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
1999     LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
2000 #endif
2001     sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
2002 
2003     /*
2004      * We want:
2005      *   no ethernet address in frames we write
2006      *   disable padding (txdesc, padding disable)
2007      *   ignore runt frames (rdes0 bit 15)
2008      *   no receiver watchdog or transmitter jabber timer
2009      *       (csr15 bit 0,14 == 1)
2010      *   if using 16-bit CRC, turn off CRC (trans desc, crc disable)
2011      */
2012 
2013     sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
2014                          | TULIP_CMD_FULLDUPLEX
2015                          | TULIP_CMD_PASSBADPKT
2016                          | TULIP_CMD_NOHEARTBEAT
2017                          | TULIP_CMD_PORTSELECT
2018                          | TULIP_CMD_RECEIVEALL
2019                          | TULIP_CMD_MUSTBEONE
2020                        );
2021     sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2022                           | TULIP_CMD_THRESHOLDCTL
2023                           | TULIP_CMD_STOREFWD
2024                           | TULIP_CMD_TXTHRSHLDCTL
2025                         );
2026 
2027     LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2028 
2029     /*
2030      * disable receiver watchdog and transmit jabber
2031      */
2032     val = LMC_CSR_READ(sc, csr_sia_general);
2033     val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2034     LMC_CSR_WRITE(sc, csr_sia_general, val);
2035 
2036     lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2037 }
2038 
2039 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2040                          size_t csr_size)
2041 {
2042     lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2043     sc->lmc_csrs.csr_busmode            = csr_base +  0 * csr_size;
2044     sc->lmc_csrs.csr_txpoll             = csr_base +  1 * csr_size;
2045     sc->lmc_csrs.csr_rxpoll             = csr_base +  2 * csr_size;
2046     sc->lmc_csrs.csr_rxlist             = csr_base +  3 * csr_size;
2047     sc->lmc_csrs.csr_txlist             = csr_base +  4 * csr_size;
2048     sc->lmc_csrs.csr_status             = csr_base +  5 * csr_size;
2049     sc->lmc_csrs.csr_command            = csr_base +  6 * csr_size;
2050     sc->lmc_csrs.csr_intr               = csr_base +  7 * csr_size;
2051     sc->lmc_csrs.csr_missed_frames      = csr_base +  8 * csr_size;
2052     sc->lmc_csrs.csr_9                  = csr_base +  9 * csr_size;
2053     sc->lmc_csrs.csr_10                 = csr_base + 10 * csr_size;
2054     sc->lmc_csrs.csr_11                 = csr_base + 11 * csr_size;
2055     sc->lmc_csrs.csr_12                 = csr_base + 12 * csr_size;
2056     sc->lmc_csrs.csr_13                 = csr_base + 13 * csr_size;
2057     sc->lmc_csrs.csr_14                 = csr_base + 14 * csr_size;
2058     sc->lmc_csrs.csr_15                 = csr_base + 15 * csr_size;
2059     lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2060 }
2061 
2062 static void lmc_driver_timeout(struct net_device *dev)
2063 {
2064     lmc_softc_t *sc = dev_to_sc(dev);
2065     u32 csr6;
2066     unsigned long flags;
2067 
2068     lmc_trace(dev, "lmc_driver_timeout in");
2069 
2070     spin_lock_irqsave(&sc->lmc_lock, flags);
2071 
2072     printk("%s: Xmitter busy|\n", dev->name);
2073 
2074     sc->extra_stats.tx_tbusy_calls++;
2075     if (jiffies - dev_trans_start(dev) < TX_TIMEOUT)
2076             goto bug_out;
2077 
2078     /*
2079      * Chip seems to have locked up
2080      * Reset it
2081      * This whips out all our decriptor
2082      * table and starts from scartch
2083      */
2084 
2085     LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2086                   LMC_CSR_READ (sc, csr_status),
2087                   sc->extra_stats.tx_ProcTimeout);
2088 
2089     lmc_running_reset (dev);
2090 
2091     LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2092     LMC_EVENT_LOG(LMC_EVENT_RESET2,
2093                   lmc_mii_readreg (sc, 0, 16),
2094                   lmc_mii_readreg (sc, 0, 17));
2095 
2096     /* restart the tx processes */
2097     csr6 = LMC_CSR_READ (sc, csr_command);
2098     LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2099     LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2100 
2101     /* immediate transmit */
2102     LMC_CSR_WRITE (sc, csr_txpoll, 0);
2103 
2104     sc->lmc_device->stats.tx_errors++;
2105     sc->extra_stats.tx_ProcTimeout++; /* -baz */
2106 
2107     netif_trans_update(dev); /* prevent tx timeout */
2108 
2109 bug_out:
2110 
2111     spin_unlock_irqrestore(&sc->lmc_lock, flags);
2112 
2113     lmc_trace(dev, "lmc_driver_timeout out");
2114 
2115 
2116 }
2117 

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