linux/drivers/net/wan/lmc/lmc_main.c
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   1 /*
   2  * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
   3  * All rights reserved.  www.lanmedia.com
   4  * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
   5  *
   6  * This code is written by:
   7  * Andrew Stanley-Jones (asj@cban.com)
   8  * Rob Braun (bbraun@vix.com),
   9  * Michael Graff (explorer@vix.com) and
  10  * Matt Thomas (matt@3am-software.com).
  11  *
  12  * With Help By:
  13  * David Boggs
  14  * Ron Crane
  15  * Alan Cox
  16  *
  17  * This software may be used and distributed according to the terms
  18  * of the GNU General Public License version 2, incorporated herein by reference.
  19  *
  20  * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards.
  21  *
  22  * To control link specific options lmcctl is required.
  23  * It can be obtained from ftp.lanmedia.com.
  24  *
  25  * Linux driver notes:
  26  * Linux uses the device struct lmc_private to pass private information
  27  * around.
  28  *
  29  * The initialization portion of this driver (the lmc_reset() and the
  30  * lmc_dec_reset() functions, as well as the led controls and the
  31  * lmc_initcsrs() functions.
  32  *
  33  * The watchdog function runs every second and checks to see if
  34  * we still have link, and that the timing source is what we expected
  35  * it to be.  If link is lost, the interface is marked down, and
  36  * we no longer can transmit.
  37  *
  38  */
  39
  40#include <linux/kernel.h>
  41#include <linux/module.h>
  42#include <linux/string.h>
  43#include <linux/timer.h>
  44#include <linux/ptrace.h>
  45#include <linux/errno.h>
  46#include <linux/ioport.h>
  47#include <linux/slab.h>
  48#include <linux/interrupt.h>
  49#include <linux/pci.h>
  50#include <linux/delay.h>
  51#include <linux/hdlc.h>
  52#include <linux/in.h>
  53#include <linux/if_arp.h>
  54#include <linux/netdevice.h>
  55#include <linux/etherdevice.h>
  56#include <linux/skbuff.h>
  57#include <linux/inet.h>
  58#include <linux/bitops.h>
  59#include <asm/processor.h>             /* Processor type for cache alignment. */
  60#include <asm/io.h>
  61#include <asm/dma.h>
  62#include <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
  77static int LMC_PKT_BUF_SZ = 1542;
  78
  79static 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
  87MODULE_DEVICE_TABLE(pci, lmc_pci_tbl);
  88MODULE_LICENSE("GPL v2");
  89
  90
  91static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
  92                                        struct net_device *dev);
  93static int lmc_rx (struct net_device *dev);
  94static int lmc_open(struct net_device *dev);
  95static int lmc_close(struct net_device *dev);
  96static struct net_device_stats *lmc_get_stats(struct net_device *dev);
  97static irqreturn_t lmc_interrupt(int irq, void *dev_instance);
  98static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size);
  99static void lmc_softreset(lmc_softc_t * const);
 100static void lmc_running_reset(struct net_device *dev);
 101static int lmc_ifdown(struct net_device * const);
 102static void lmc_watchdog(struct timer_list *t);
 103static void lmc_reset(lmc_softc_t * const sc);
 104static void lmc_dec_reset(lmc_softc_t * const sc);
 105static void lmc_driver_timeout(struct net_device *dev);
 106
 107/*
 108 * linux reserves 16 device specific IOCTLs.  We call them
 109 * LMCIOC* to control various bits of our world.
 110 */
 111int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
 112{
 113    lmc_softc_t *sc = dev_to_sc(dev);
 114    lmc_ctl_t ctl;
 115    int ret = -EOPNOTSUPP;
 116    u16 regVal;
 117    unsigned long flags;
 118
 119    lmc_trace(dev, "lmc_ioctl in");
 120
 121    /*
 122     * Most functions mess with the structure
 123     * Disable interrupts while we do the polling
 124     */
 125
 126    switch (cmd) {
 127        /*
 128         * Return current driver state.  Since we keep this up
 129         * To date internally, just copy this out to the user.
 130         */
 131    case LMCIOCGINFO: /*fold01*/
 132        if (copy_to_user(ifr->ifr_data, &sc->ictl, sizeof(lmc_ctl_t)))
 133                ret = -EFAULT;
 134        else
 135                ret = 0;
 136        break;
 137
 138    case LMCIOCSINFO: /*fold01*/
 139        if (!capable(CAP_NET_ADMIN)) {
 140            ret = -EPERM;
 141            break;
 142        }
 143
 144        if(dev->flags & IFF_UP){
 145            ret = -EBUSY;
 146            break;
 147        }
 148
 149        if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
 150                ret = -EFAULT;
 151                break;
 152        }
 153
 154        spin_lock_irqsave(&sc->lmc_lock, flags);
 155        sc->lmc_media->set_status (sc, &ctl);
 156
 157        if(ctl.crc_length != sc->ictl.crc_length) {
 158            sc->lmc_media->set_crc_length(sc, ctl.crc_length);
 159            if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16)
 160                sc->TxDescriptControlInit |=  LMC_TDES_ADD_CRC_DISABLE;
 161            else
 162                sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE;
 163        }
 164        spin_unlock_irqrestore(&sc->lmc_lock, flags);
 165
 166        ret = 0;
 167        break;
 168
 169    case LMCIOCIFTYPE: /*fold01*/
 170        {
 171            u16 old_type = sc->if_type;
 172            u16 new_type;
 173
 174            if (!capable(CAP_NET_ADMIN)) {
 175                ret = -EPERM;
 176                break;
 177            }
 178
 179            if (copy_from_user(&new_type, ifr->ifr_data, sizeof(u16))) {
 180                ret = -EFAULT;
 181                break;
 182            }
 183
 184            
 185            if (new_type == old_type)
 186            {
 187                ret = 0 ;
 188                break;                          /* no change */
 189            }
 190            
 191            spin_lock_irqsave(&sc->lmc_lock, flags);
 192            lmc_proto_close(sc);
 193
 194            sc->if_type = new_type;
 195            lmc_proto_attach(sc);
 196            ret = lmc_proto_open(sc);
 197            spin_unlock_irqrestore(&sc->lmc_lock, flags);
 198            break;
 199        }
 200
 201    case LMCIOCGETXINFO: /*fold01*/
 202        spin_lock_irqsave(&sc->lmc_lock, flags);
 203        sc->lmc_xinfo.Magic0 = 0xBEEFCAFE;
 204
 205        sc->lmc_xinfo.PciCardType = sc->lmc_cardtype;
 206        sc->lmc_xinfo.PciSlotNumber = 0;
 207        sc->lmc_xinfo.DriverMajorVersion = DRIVER_MAJOR_VERSION;
 208        sc->lmc_xinfo.DriverMinorVersion = DRIVER_MINOR_VERSION;
 209        sc->lmc_xinfo.DriverSubVersion = DRIVER_SUB_VERSION;
 210        sc->lmc_xinfo.XilinxRevisionNumber =
 211            lmc_mii_readreg (sc, 0, 3) & 0xf;
 212        sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ;
 213        sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc);
 214        sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16);
 215        spin_unlock_irqrestore(&sc->lmc_lock, flags);
 216
 217        sc->lmc_xinfo.Magic1 = 0xDEADBEEF;
 218
 219        if (copy_to_user(ifr->ifr_data, &sc->lmc_xinfo,
 220                         sizeof(struct lmc_xinfo)))
 221                ret = -EFAULT;
 222        else
 223                ret = 0;
 224
 225        break;
 226
 227    case LMCIOCGETLMCSTATS:
 228            spin_lock_irqsave(&sc->lmc_lock, flags);
 229            if (sc->lmc_cardtype == LMC_CARDTYPE_T1) {
 230                    lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB);
 231                    sc->extra_stats.framingBitErrorCount +=
 232                            lmc_mii_readreg(sc, 0, 18) & 0xff;
 233                    lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_MSB);
 234                    sc->extra_stats.framingBitErrorCount +=
 235                            (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
 236                    lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_LSB);
 237                    sc->extra_stats.lineCodeViolationCount +=
 238                            lmc_mii_readreg(sc, 0, 18) & 0xff;
 239                    lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_MSB);
 240                    sc->extra_stats.lineCodeViolationCount +=
 241                            (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
 242                    lmc_mii_writereg(sc, 0, 17, T1FRAMER_AERR);
 243                    regVal = lmc_mii_readreg(sc, 0, 18) & 0xff;
 244
 245                    sc->extra_stats.lossOfFrameCount +=
 246                            (regVal & T1FRAMER_LOF_MASK) >> 4;
 247                    sc->extra_stats.changeOfFrameAlignmentCount +=
 248                            (regVal & T1FRAMER_COFA_MASK) >> 2;
 249                    sc->extra_stats.severelyErroredFrameCount +=
 250                            regVal & T1FRAMER_SEF_MASK;
 251            }
 252            spin_unlock_irqrestore(&sc->lmc_lock, flags);
 253            if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats,
 254                             sizeof(sc->lmc_device->stats)) ||
 255                copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats),
 256                             &sc->extra_stats, sizeof(sc->extra_stats)))
 257                    ret = -EFAULT;
 258            else
 259                    ret = 0;
 260            break;
 261
 262    case LMCIOCCLEARLMCSTATS:
 263            if (!capable(CAP_NET_ADMIN)) {
 264                    ret = -EPERM;
 265                    break;
 266            }
 267
 268            spin_lock_irqsave(&sc->lmc_lock, flags);
 269            memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats));
 270            memset(&sc->extra_stats, 0, sizeof(sc->extra_stats));
 271            sc->extra_stats.check = STATCHECK;
 272            sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
 273                    sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
 274            sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
 275            spin_unlock_irqrestore(&sc->lmc_lock, flags);
 276            ret = 0;
 277            break;
 278
 279    case LMCIOCSETCIRCUIT: /*fold01*/
 280        if (!capable(CAP_NET_ADMIN)){
 281            ret = -EPERM;
 282            break;
 283        }
 284
 285        if(dev->flags & IFF_UP){
 286            ret = -EBUSY;
 287            break;
 288        }
 289
 290        if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
 291                ret = -EFAULT;
 292                break;
 293        }
 294        spin_lock_irqsave(&sc->lmc_lock, flags);
 295        sc->lmc_media->set_circuit_type(sc, ctl.circuit_type);
 296        sc->ictl.circuit_type = ctl.circuit_type;
 297        spin_unlock_irqrestore(&sc->lmc_lock, flags);
 298        ret = 0;
 299
 300        break;
 301
 302    case LMCIOCRESET: /*fold01*/
 303        if (!capable(CAP_NET_ADMIN)){
 304            ret = -EPERM;
 305            break;
 306        }
 307
 308        spin_lock_irqsave(&sc->lmc_lock, flags);
 309        /* Reset driver and bring back to current state */
 310        printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
 311        lmc_running_reset (dev);
 312        printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
 313
 314        LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
 315        spin_unlock_irqrestore(&sc->lmc_lock, flags);
 316
 317        ret = 0;
 318        break;
 319
 320#ifdef DEBUG
 321    case LMCIOCDUMPEVENTLOG:
 322        if (copy_to_user(ifr->ifr_data, &lmcEventLogIndex, sizeof(u32))) {
 323                ret = -EFAULT;
 324                break;
 325        }
 326        if (copy_to_user(ifr->ifr_data + sizeof(u32), lmcEventLogBuf,
 327                         sizeof(lmcEventLogBuf)))
 328                ret = -EFAULT;
 329        else
 330                ret = 0;
 331
 332        break;
 333#endif /* end ifdef _DBG_EVENTLOG */
 334    case LMCIOCT1CONTROL: /*fold01*/
 335        if (sc->lmc_cardtype != LMC_CARDTYPE_T1){
 336            ret = -EOPNOTSUPP;
 337            break;
 338        }
 339        break;
 340    case LMCIOCXILINX: /*fold01*/
 341        {
 342            struct lmc_xilinx_control xc; /*fold02*/
 343
 344            if (!capable(CAP_NET_ADMIN)){
 345                ret = -EPERM;
 346                break;
 347            }
 348
 349            /*
 350             * Stop the xwitter whlie we restart the hardware
 351             */
 352            netif_stop_queue(dev);
 353
 354            if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
 355                ret = -EFAULT;
 356                break;
 357            }
 358            switch(xc.command){
 359            case lmc_xilinx_reset: /*fold02*/
 360                {
 361                    u16 mii;
 362                    spin_lock_irqsave(&sc->lmc_lock, flags);
 363                    mii = lmc_mii_readreg (sc, 0, 16);
 364
 365                    /*
 366                     * Make all of them 0 and make input
 367                     */
 368                    lmc_gpio_mkinput(sc, 0xff);
 369
 370                    /*
 371                     * make the reset output
 372                     */
 373                    lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
 374
 375                    /*
 376                     * RESET low to force configuration.  This also forces
 377                     * the transmitter clock to be internal, but we expect to reset
 378                     * that later anyway.
 379                     */
 380
 381                    sc->lmc_gpio &= ~LMC_GEP_RESET;
 382                    LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
 383
 384
 385                    /*
 386                     * hold for more than 10 microseconds
 387                     */
 388                    udelay(50);
 389
 390                    sc->lmc_gpio |= LMC_GEP_RESET;
 391                    LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
 392
 393
 394                    /*
 395                     * stop driving Xilinx-related signals
 396                     */
 397                    lmc_gpio_mkinput(sc, 0xff);
 398
 399                    /* Reset the frammer hardware */
 400                    sc->lmc_media->set_link_status (sc, 1);
 401                    sc->lmc_media->set_status (sc, NULL);
 402//                    lmc_softreset(sc);
 403
 404                    {
 405                        int i;
 406                        for(i = 0; i < 5; i++){
 407                            lmc_led_on(sc, LMC_DS3_LED0);
 408                            mdelay(100);
 409                            lmc_led_off(sc, LMC_DS3_LED0);
 410                            lmc_led_on(sc, LMC_DS3_LED1);
 411                            mdelay(100);
 412                            lmc_led_off(sc, LMC_DS3_LED1);
 413                            lmc_led_on(sc, LMC_DS3_LED3);
 414                            mdelay(100);
 415                            lmc_led_off(sc, LMC_DS3_LED3);
 416                            lmc_led_on(sc, LMC_DS3_LED2);
 417                            mdelay(100);
 418                            lmc_led_off(sc, LMC_DS3_LED2);
 419                        }
 420                    }
 421                    spin_unlock_irqrestore(&sc->lmc_lock, flags);
 422                    
 423                    
 424
 425                    ret = 0x0;
 426
 427                }
 428
 429                break;
 430            case lmc_xilinx_load_prom: /*fold02*/
 431                {
 432                    u16 mii;
 433                    int timeout = 500000;
 434                    spin_lock_irqsave(&sc->lmc_lock, flags);
 435                    mii = lmc_mii_readreg (sc, 0, 16);
 436
 437                    /*
 438                     * Make all of them 0 and make input
 439                     */
 440                    lmc_gpio_mkinput(sc, 0xff);
 441
 442                    /*
 443                     * make the reset output
 444                     */
 445                    lmc_gpio_mkoutput(sc,  LMC_GEP_DP | LMC_GEP_RESET);
 446
 447                    /*
 448                     * RESET low to force configuration.  This also forces
 449                     * the transmitter clock to be internal, but we expect to reset
 450                     * that later anyway.
 451                     */
 452
 453                    sc->lmc_gpio &= ~(LMC_GEP_RESET | LMC_GEP_DP);
 454                    LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
 455
 456
 457                    /*
 458                     * hold for more than 10 microseconds
 459                     */
 460                    udelay(50);
 461
 462                    sc->lmc_gpio |= LMC_GEP_DP | LMC_GEP_RESET;
 463                    LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
 464
 465                    /*
 466                     * busy wait for the chip to reset
 467                     */
 468                    while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
 469                           (timeout-- > 0))
 470                        cpu_relax();
 471
 472
 473                    /*
 474                     * stop driving Xilinx-related signals
 475                     */
 476                    lmc_gpio_mkinput(sc, 0xff);
 477                    spin_unlock_irqrestore(&sc->lmc_lock, flags);
 478
 479                    ret = 0x0;
 480                    
 481
 482                    break;
 483
 484                }
 485
 486            case lmc_xilinx_load: /*fold02*/
 487                {
 488                    char *data;
 489                    int pos;
 490                    int timeout = 500000;
 491
 492                    if (!xc.data) {
 493                            ret = -EINVAL;
 494                            break;
 495                    }
 496
 497                    data = 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 */
 632static 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     */
 775kick_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
 793static 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
 801static 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
 810static 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 */
 968static 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 */
 982static 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
1093static 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 */
1129static 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 */
1149static 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 */
1214static 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_consume_skb_irq(sc->lmc_txq[i]);
1324                sc->lmc_txq[i] = NULL;
1325
1326                badtx++;
1327                i = badtx % LMC_TXDESCS;
1328            }
1329
1330            if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1331            {
1332                printk ("%s: out of sync pointer\n", dev->name);
1333                badtx += LMC_TXDESCS;
1334            }
1335            LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1336            sc->lmc_txfull = 0;
1337            netif_wake_queue(dev);
1338            sc->extra_stats.tx_tbusy0++;
1339
1340
1341#ifdef DEBUG
1342            sc->extra_stats.dirtyTx = badtx;
1343            sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1344            sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1345#endif
1346            sc->lmc_taint_tx = badtx;
1347
1348            /*
1349             * Why was there a break here???
1350             */
1351        }                       /* end handle transmit interrupt */
1352
1353        if (csr & TULIP_STS_SYSERROR) {
1354            u32 error;
1355            printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1356            error = csr>>23 & 0x7;
1357            switch(error){
1358            case 0x000:
1359                printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1360                break;
1361            case 0x001:
1362                printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1363                break;
1364            case 0x002:
1365                printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1366                break;
1367            default:
1368                printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1369            }
1370            lmc_dec_reset (sc);
1371            lmc_reset (sc);
1372            LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1373            LMC_EVENT_LOG(LMC_EVENT_RESET2,
1374                          lmc_mii_readreg (sc, 0, 16),
1375                          lmc_mii_readreg (sc, 0, 17));
1376
1377        }
1378
1379        
1380        if(max_work-- <= 0)
1381            break;
1382        
1383        /*
1384         * Get current csr status to make sure
1385         * we've cleared all interrupts
1386         */
1387        csr = LMC_CSR_READ (sc, csr_status);
1388    }                           /* end interrupt loop */
1389    LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1390
1391lmc_int_fail_out:
1392
1393    spin_unlock(&sc->lmc_lock);
1394
1395    lmc_trace(dev, "lmc_interrupt out");
1396    return IRQ_RETVAL(handled);
1397}
1398
1399static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
1400                                        struct net_device *dev)
1401{
1402    lmc_softc_t *sc = dev_to_sc(dev);
1403    u32 flag;
1404    int entry;
1405    unsigned long flags;
1406
1407    lmc_trace(dev, "lmc_start_xmit in");
1408
1409    spin_lock_irqsave(&sc->lmc_lock, flags);
1410
1411    /* normal path, tbusy known to be zero */
1412
1413    entry = sc->lmc_next_tx % LMC_TXDESCS;
1414
1415    sc->lmc_txq[entry] = skb;
1416    sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1417
1418    LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1419
1420#ifndef GCOM
1421    /* If the queue is less than half full, don't interrupt */
1422    if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1423    {
1424        /* Do not interrupt on completion of this packet */
1425        flag = 0x60000000;
1426        netif_wake_queue(dev);
1427    }
1428    else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1429    {
1430        /* This generates an interrupt on completion of this packet */
1431        flag = 0xe0000000;
1432        netif_wake_queue(dev);
1433    }
1434    else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1435    {
1436        /* Do not interrupt on completion of this packet */
1437        flag = 0x60000000;
1438        netif_wake_queue(dev);
1439    }
1440    else
1441    {
1442        /* This generates an interrupt on completion of this packet */
1443        flag = 0xe0000000;
1444        sc->lmc_txfull = 1;
1445        netif_stop_queue(dev);
1446    }
1447#else
1448    flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1449
1450    if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1451    {                           /* ring full, go busy */
1452        sc->lmc_txfull = 1;
1453        netif_stop_queue(dev);
1454        sc->extra_stats.tx_tbusy1++;
1455        LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1456    }
1457#endif
1458
1459
1460    if (entry == LMC_TXDESCS - 1)       /* last descriptor in ring */
1461        flag |= LMC_TDES_END_OF_RING;   /* flag as such for Tulip */
1462
1463    /* don't pad small packets either */
1464    flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1465                                                sc->TxDescriptControlInit;
1466
1467    /* set the transmit timeout flag to be checked in
1468     * the watchdog timer handler. -baz
1469     */
1470
1471    sc->extra_stats.tx_NoCompleteCnt++;
1472    sc->lmc_next_tx++;
1473
1474    /* give ownership to the chip */
1475    LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1476    sc->lmc_txring[entry].status = 0x80000000;
1477
1478    /* send now! */
1479    LMC_CSR_WRITE (sc, csr_txpoll, 0);
1480
1481    spin_unlock_irqrestore(&sc->lmc_lock, flags);
1482
1483    lmc_trace(dev, "lmc_start_xmit_out");
1484    return NETDEV_TX_OK;
1485}
1486
1487
1488static int lmc_rx(struct net_device *dev)
1489{
1490    lmc_softc_t *sc = dev_to_sc(dev);
1491    int i;
1492    int rx_work_limit = LMC_RXDESCS;
1493    int rxIntLoopCnt;           /* debug -baz */
1494    int localLengthErrCnt = 0;
1495    long stat;
1496    struct sk_buff *skb, *nsb;
1497    u16 len;
1498
1499    lmc_trace(dev, "lmc_rx in");
1500
1501    lmc_led_on(sc, LMC_DS3_LED3);
1502
1503    rxIntLoopCnt = 0;           /* debug -baz */
1504
1505    i = sc->lmc_next_rx % LMC_RXDESCS;
1506
1507    while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4)
1508    {
1509        rxIntLoopCnt++;         /* debug -baz */
1510        len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER);
1511        if ((stat & 0x0300) != 0x0300) {  /* Check first segment and last segment */
1512                if ((stat & 0x0000ffff) != 0x7fff) {
1513                        /* Oversized frame */
1514                        sc->lmc_device->stats.rx_length_errors++;
1515                        goto skip_packet;
1516                }
1517        }
1518
1519        if (stat & 0x00000008) { /* Catch a dribbling bit error */
1520                sc->lmc_device->stats.rx_errors++;
1521                sc->lmc_device->stats.rx_frame_errors++;
1522                goto skip_packet;
1523        }
1524
1525
1526        if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */
1527                sc->lmc_device->stats.rx_errors++;
1528                sc->lmc_device->stats.rx_crc_errors++;
1529                goto skip_packet;
1530        }
1531
1532        if (len > LMC_PKT_BUF_SZ) {
1533                sc->lmc_device->stats.rx_length_errors++;
1534                localLengthErrCnt++;
1535                goto skip_packet;
1536        }
1537
1538        if (len < sc->lmc_crcSize + 2) {
1539                sc->lmc_device->stats.rx_length_errors++;
1540                sc->extra_stats.rx_SmallPktCnt++;
1541                localLengthErrCnt++;
1542                goto skip_packet;
1543        }
1544
1545        if(stat & 0x00004000){
1546            printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name);
1547        }
1548
1549        len -= sc->lmc_crcSize;
1550
1551        skb = sc->lmc_rxq[i];
1552
1553        /*
1554         * We ran out of memory at some point
1555         * just allocate an skb buff and continue.
1556         */
1557        
1558        if (!skb) {
1559            nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1560            if (nsb) {
1561                sc->lmc_rxq[i] = nsb;
1562                nsb->dev = dev;
1563                sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1564            }
1565            sc->failed_recv_alloc = 1;
1566            goto skip_packet;
1567        }
1568        
1569        sc->lmc_device->stats.rx_packets++;
1570        sc->lmc_device->stats.rx_bytes += len;
1571
1572        LMC_CONSOLE_LOG("recv", skb->data, len);
1573
1574        /*
1575         * I'm not sure of the sanity of this
1576         * Packets could be arriving at a constant
1577         * 44.210mbits/sec and we're going to copy
1578         * them into a new buffer??
1579         */
1580        
1581        if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1582            /*
1583             * If it's a large packet don't copy it just hand it up
1584             */
1585        give_it_anyways:
1586
1587            sc->lmc_rxq[i] = NULL;
1588            sc->lmc_rxring[i].buffer1 = 0x0;
1589
1590            skb_put (skb, len);
1591            skb->protocol = lmc_proto_type(sc, skb);
1592            skb_reset_mac_header(skb);
1593            /* skb_reset_network_header(skb); */
1594            skb->dev = dev;
1595            lmc_proto_netif(sc, skb);
1596
1597            /*
1598             * This skb will be destroyed by the upper layers, make a new one
1599             */
1600            nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1601            if (nsb) {
1602                sc->lmc_rxq[i] = nsb;
1603                nsb->dev = dev;
1604                sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1605                /* Transferred to 21140 below */
1606            }
1607            else {
1608                /*
1609                 * We've run out of memory, stop trying to allocate
1610                 * memory and exit the interrupt handler
1611                 *
1612                 * The chip may run out of receivers and stop
1613                 * in which care we'll try to allocate the buffer
1614                 * again.  (once a second)
1615                 */
1616                sc->extra_stats.rx_BuffAllocErr++;
1617                LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1618                sc->failed_recv_alloc = 1;
1619                goto skip_out_of_mem;
1620            }
1621        }
1622        else {
1623            nsb = dev_alloc_skb(len);
1624            if(!nsb) {
1625                goto give_it_anyways;
1626            }
1627            skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1628            
1629            nsb->protocol = lmc_proto_type(sc, nsb);
1630            skb_reset_mac_header(nsb);
1631            /* skb_reset_network_header(nsb); */
1632            nsb->dev = dev;
1633            lmc_proto_netif(sc, nsb);
1634        }
1635
1636    skip_packet:
1637        LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1638        sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1639
1640        sc->lmc_next_rx++;
1641        i = sc->lmc_next_rx % LMC_RXDESCS;
1642        rx_work_limit--;
1643        if (rx_work_limit < 0)
1644            break;
1645    }
1646
1647    /* detect condition for LMC1000 where DSU cable attaches and fills
1648     * descriptors with bogus packets
1649     *
1650    if (localLengthErrCnt > LMC_RXDESCS - 3) {
1651        sc->extra_stats.rx_BadPktSurgeCnt++;
1652        LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1653                      sc->extra_stats.rx_BadPktSurgeCnt);
1654    } */
1655
1656    /* save max count of receive descriptors serviced */
1657    if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1658            sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1659
1660#ifdef DEBUG
1661    if (rxIntLoopCnt == 0)
1662    {
1663        for (i = 0; i < LMC_RXDESCS; i++)
1664        {
1665            if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1666                != DESC_OWNED_BY_DC21X4)
1667            {
1668                rxIntLoopCnt++;
1669            }
1670        }
1671        LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1672    }
1673#endif
1674
1675
1676    lmc_led_off(sc, LMC_DS3_LED3);
1677
1678skip_out_of_mem:
1679
1680    lmc_trace(dev, "lmc_rx out");
1681
1682    return 0;
1683}
1684
1685static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1686{
1687    lmc_softc_t *sc = dev_to_sc(dev);
1688    unsigned long flags;
1689
1690    lmc_trace(dev, "lmc_get_stats in");
1691
1692    spin_lock_irqsave(&sc->lmc_lock, flags);
1693
1694    sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1695
1696    spin_unlock_irqrestore(&sc->lmc_lock, flags);
1697
1698    lmc_trace(dev, "lmc_get_stats out");
1699
1700    return &sc->lmc_device->stats;
1701}
1702
1703static struct pci_driver lmc_driver = {
1704        .name           = "lmc",
1705        .id_table       = lmc_pci_tbl,
1706        .probe          = lmc_init_one,
1707        .remove         = lmc_remove_one,
1708};
1709
1710module_pci_driver(lmc_driver);
1711
1712unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1713{
1714    int i;
1715    int command = (0xf6 << 10) | (devaddr << 5) | regno;
1716    int retval = 0;
1717
1718    lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1719
1720    LMC_MII_SYNC (sc);
1721
1722    lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1723
1724    for (i = 15; i >= 0; i--)
1725    {
1726        int dataval = (command & (1 << i)) ? 0x20000 : 0;
1727
1728        LMC_CSR_WRITE (sc, csr_9, dataval);
1729        lmc_delay ();
1730        /* __SLOW_DOWN_IO; */
1731        LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1732        lmc_delay ();
1733        /* __SLOW_DOWN_IO; */
1734    }
1735
1736    lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1737
1738    for (i = 19; i > 0; i--)
1739    {
1740        LMC_CSR_WRITE (sc, csr_9, 0x40000);
1741        lmc_delay ();
1742        /* __SLOW_DOWN_IO; */
1743        retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1744        LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1745        lmc_delay ();
1746        /* __SLOW_DOWN_IO; */
1747    }
1748
1749    lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1750
1751    return (retval >> 1) & 0xffff;
1752}
1753
1754void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1755{
1756    int i = 32;
1757    int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1758
1759    lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1760
1761    LMC_MII_SYNC (sc);
1762
1763    i = 31;
1764    while (i >= 0)
1765    {
1766        int datav;
1767
1768        if (command & (1 << i))
1769            datav = 0x20000;
1770        else
1771            datav = 0x00000;
1772
1773        LMC_CSR_WRITE (sc, csr_9, datav);
1774        lmc_delay ();
1775        /* __SLOW_DOWN_IO; */
1776        LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1777        lmc_delay ();
1778        /* __SLOW_DOWN_IO; */
1779        i--;
1780    }
1781
1782    i = 2;
1783    while (i > 0)
1784    {
1785        LMC_CSR_WRITE (sc, csr_9, 0x40000);
1786        lmc_delay ();
1787        /* __SLOW_DOWN_IO; */
1788        LMC_CSR_WRITE (sc, csr_9, 0x50000);
1789        lmc_delay ();
1790        /* __SLOW_DOWN_IO; */
1791        i--;
1792    }
1793
1794    lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1795}
1796
1797static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1798{
1799    int i;
1800
1801    lmc_trace(sc->lmc_device, "lmc_softreset in");
1802
1803    /* Initialize the receive rings and buffers. */
1804    sc->lmc_txfull = 0;
1805    sc->lmc_next_rx = 0;
1806    sc->lmc_next_tx = 0;
1807    sc->lmc_taint_rx = 0;
1808    sc->lmc_taint_tx = 0;
1809
1810    /*
1811     * Setup each one of the receiver buffers
1812     * allocate an skbuff for each one, setup the descriptor table
1813     * and point each buffer at the next one
1814     */
1815
1816    for (i = 0; i < LMC_RXDESCS; i++)
1817    {
1818        struct sk_buff *skb;
1819
1820        if (sc->lmc_rxq[i] == NULL)
1821        {
1822            skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1823            if(skb == NULL){
1824                printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1825                sc->failed_ring = 1;
1826                break;
1827            }
1828            else{
1829                sc->lmc_rxq[i] = skb;
1830            }
1831        }
1832        else
1833        {
1834            skb = sc->lmc_rxq[i];
1835        }
1836
1837        skb->dev = sc->lmc_device;
1838
1839        /* owned by 21140 */
1840        sc->lmc_rxring[i].status = 0x80000000;
1841
1842        /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1843        sc->lmc_rxring[i].length = skb_tailroom(skb);
1844
1845        /* use to be tail which is dumb since you're thinking why write
1846         * to the end of the packj,et but since there's nothing there tail == data
1847         */
1848        sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1849
1850        /* This is fair since the structure is static and we have the next address */
1851        sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1852
1853    }
1854
1855    /*
1856     * Sets end of ring
1857     */
1858    if (i != 0) {
1859        sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1860        sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
1861    }
1862    LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1863
1864    /* Initialize the transmit rings and buffers */
1865    for (i = 0; i < LMC_TXDESCS; i++)
1866    {
1867        if (sc->lmc_txq[i] != NULL){            /* have buffer */
1868            dev_kfree_skb(sc->lmc_txq[i]);      /* free it */
1869            sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */
1870        }
1871        sc->lmc_txq[i] = NULL;
1872        sc->lmc_txring[i].status = 0x00000000;
1873        sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1874    }
1875    sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1876    LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1877
1878    lmc_trace(sc->lmc_device, "lmc_softreset out");
1879}
1880
1881void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1882{
1883    lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1884    sc->lmc_gpio_io &= ~bits;
1885    LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1886    lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1887}
1888
1889void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1890{
1891    lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1892    sc->lmc_gpio_io |= bits;
1893    LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1894    lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1895}
1896
1897void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1898{
1899    lmc_trace(sc->lmc_device, "lmc_led_on in");
1900    if((~sc->lmc_miireg16) & led){ /* Already on! */
1901        lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1902        return;
1903    }
1904    
1905    sc->lmc_miireg16 &= ~led;
1906    lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1907    lmc_trace(sc->lmc_device, "lmc_led_on out");
1908}
1909
1910void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1911{
1912    lmc_trace(sc->lmc_device, "lmc_led_off in");
1913    if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1914        lmc_trace(sc->lmc_device, "lmc_led_off aoff out");
1915        return;
1916    }
1917    
1918    sc->lmc_miireg16 |= led;
1919    lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1920    lmc_trace(sc->lmc_device, "lmc_led_off out");
1921}
1922
1923static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1924{
1925    lmc_trace(sc->lmc_device, "lmc_reset in");
1926    sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1927    lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1928
1929    sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1930    lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1931
1932    /*
1933     * make some of the GPIO pins be outputs
1934     */
1935    lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1936
1937    /*
1938     * RESET low to force state reset.  This also forces
1939     * the transmitter clock to be internal, but we expect to reset
1940     * that later anyway.
1941     */
1942    sc->lmc_gpio &= ~(LMC_GEP_RESET);
1943    LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1944
1945    /*
1946     * hold for more than 10 microseconds
1947     */
1948    udelay(50);
1949
1950    /*
1951     * stop driving Xilinx-related signals
1952     */
1953    lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1954
1955    /*
1956     * Call media specific init routine
1957     */
1958    sc->lmc_media->init(sc);
1959
1960    sc->extra_stats.resetCount++;
1961    lmc_trace(sc->lmc_device, "lmc_reset out");
1962}
1963
1964static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
1965{
1966    u32 val;
1967    lmc_trace(sc->lmc_device, "lmc_dec_reset in");
1968
1969    /*
1970     * disable all interrupts
1971     */
1972    sc->lmc_intrmask = 0;
1973    LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
1974
1975    /*
1976     * Reset the chip with a software reset command.
1977     * Wait 10 microseconds (actually 50 PCI cycles but at
1978     * 33MHz that comes to two microseconds but wait a
1979     * bit longer anyways)
1980     */
1981    LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
1982    udelay(25);
1983#ifdef __sparc__
1984    sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
1985    sc->lmc_busmode = 0x00100000;
1986    sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
1987    LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
1988#endif
1989    sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
1990
1991    /*
1992     * We want:
1993     *   no ethernet address in frames we write
1994     *   disable padding (txdesc, padding disable)
1995     *   ignore runt frames (rdes0 bit 15)
1996     *   no receiver watchdog or transmitter jabber timer
1997     *       (csr15 bit 0,14 == 1)
1998     *   if using 16-bit CRC, turn off CRC (trans desc, crc disable)
1999     */
2000
2001    sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
2002                         | TULIP_CMD_FULLDUPLEX
2003                         | TULIP_CMD_PASSBADPKT
2004                         | TULIP_CMD_NOHEARTBEAT
2005                         | TULIP_CMD_PORTSELECT
2006                         | TULIP_CMD_RECEIVEALL
2007                         | TULIP_CMD_MUSTBEONE
2008                       );
2009    sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2010                          | TULIP_CMD_THRESHOLDCTL
2011                          | TULIP_CMD_STOREFWD
2012                          | TULIP_CMD_TXTHRSHLDCTL
2013                        );
2014
2015    LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2016
2017    /*
2018     * disable receiver watchdog and transmit jabber
2019     */
2020    val = LMC_CSR_READ(sc, csr_sia_general);
2021    val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2022    LMC_CSR_WRITE(sc, csr_sia_general, val);
2023
2024    lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2025}
2026
2027static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2028                         size_t csr_size)
2029{
2030    lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2031    sc->lmc_csrs.csr_busmode            = csr_base +  0 * csr_size;
2032    sc->lmc_csrs.csr_txpoll             = csr_base +  1 * csr_size;
2033    sc->lmc_csrs.csr_rxpoll             = csr_base +  2 * csr_size;
2034    sc->lmc_csrs.csr_rxlist             = csr_base +  3 * csr_size;
2035    sc->lmc_csrs.csr_txlist             = csr_base +  4 * csr_size;
2036    sc->lmc_csrs.csr_status             = csr_base +  5 * csr_size;
2037    sc->lmc_csrs.csr_command            = csr_base +  6 * csr_size;
2038    sc->lmc_csrs.csr_intr               = csr_base +  7 * csr_size;
2039    sc->lmc_csrs.csr_missed_frames      = csr_base +  8 * csr_size;
2040    sc->lmc_csrs.csr_9                  = csr_base +  9 * csr_size;
2041    sc->lmc_csrs.csr_10                 = csr_base + 10 * csr_size;
2042    sc->lmc_csrs.csr_11                 = csr_base + 11 * csr_size;
2043    sc->lmc_csrs.csr_12                 = csr_base + 12 * csr_size;
2044    sc->lmc_csrs.csr_13                 = csr_base + 13 * csr_size;
2045    sc->lmc_csrs.csr_14                 = csr_base + 14 * csr_size;
2046    sc->lmc_csrs.csr_15                 = csr_base + 15 * csr_size;
2047    lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2048}
2049
2050static void lmc_driver_timeout(struct net_device *dev)
2051{
2052    lmc_softc_t *sc = dev_to_sc(dev);
2053    u32 csr6;
2054    unsigned long flags;
2055
2056    lmc_trace(dev, "lmc_driver_timeout in");
2057
2058    spin_lock_irqsave(&sc->lmc_lock, flags);
2059
2060    printk("%s: Xmitter busy|\n", dev->name);
2061
2062    sc->extra_stats.tx_tbusy_calls++;
2063    if (jiffies - dev_trans_start(dev) < TX_TIMEOUT)
2064            goto bug_out;
2065
2066    /*
2067     * Chip seems to have locked up
2068     * Reset it
2069     * This whips out all our decriptor
2070     * table and starts from scartch
2071     */
2072
2073    LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2074                  LMC_CSR_READ (sc, csr_status),
2075                  sc->extra_stats.tx_ProcTimeout);
2076
2077    lmc_running_reset (dev);
2078
2079    LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2080    LMC_EVENT_LOG(LMC_EVENT_RESET2,
2081                  lmc_mii_readreg (sc, 0, 16),
2082                  lmc_mii_readreg (sc, 0, 17));
2083
2084    /* restart the tx processes */
2085    csr6 = LMC_CSR_READ (sc, csr_command);
2086    LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2087    LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2088
2089    /* immediate transmit */
2090    LMC_CSR_WRITE (sc, csr_txpoll, 0);
2091
2092    sc->lmc_device->stats.tx_errors++;
2093    sc->extra_stats.tx_ProcTimeout++; /* -baz */
2094
2095    netif_trans_update(dev); /* prevent tx timeout */
2096
2097bug_out:
2098
2099    spin_unlock_irqrestore(&sc->lmc_lock, flags);
2100
2101    lmc_trace(dev, "lmc_driver_timeout out");
2102
2103
2104}
2105