drivers/net/pcmcia/nmclan_cs.c

   1 /* ----------------------------------------------------------------------------
   2 Linux PCMCIA ethernet adapter driver for the New Media Ethernet LAN.
   3   nmclan_cs.c,v 0.16 1995/07/01 06:42:17 rpao Exp rpao
   4
   5   The Ethernet LAN uses the Advanced Micro Devices (AMD) Am79C940 Media
   6   Access Controller for Ethernet (MACE).  It is essentially the Am2150
   7   PCMCIA Ethernet card contained in the Am2150 Demo Kit.
   8
   9 Written by Roger C. Pao <rpao@paonet.org>
  10   Copyright 1995 Roger C. Pao
  11   Linux 2.5 cleanups Copyright Red Hat 2003
  12
  13   This software may be used and distributed according to the terms of
  14   the GNU General Public License.
  15
  16 Ported to Linux 1.3.* network driver environment by
  17   Matti Aarnio <mea@utu.fi>
  18
  19 References
  20
  21   Am2150 Technical Reference Manual, Revision 1.0, August 17, 1993
  22   Am79C940 (MACE) Data Sheet, 1994
  23   Am79C90 (C-LANCE) Data Sheet, 1994
  24   Linux PCMCIA Programmer's Guide v1.17
  25   /usr/src/linux/net/inet/dev.c, Linux kernel 1.2.8
  26
  27   Eric Mears, New Media Corporation
  28   Tom Pollard, New Media Corporation
  29   Dean Siasoyco, New Media Corporation
  30   Ken Lesniak, Silicon Graphics, Inc. <lesniak@boston.sgi.com>
  31   Donald Becker <becker@scyld.com>
  32   David Hinds <dahinds@users.sourceforge.net>
  33
  34   The Linux client driver is based on the 3c589_cs.c client driver by
  35   David Hinds.
  36
  37   The Linux network driver outline is based on the 3c589_cs.c driver,
  38   the 8390.c driver, and the example skeleton.c kernel code, which are
  39   by Donald Becker.
  40
  41   The Am2150 network driver hardware interface code is based on the
  42   OS/9000 driver for the New Media Ethernet LAN by Eric Mears.
  43
  44   Special thanks for testing and help in debugging this driver goes
  45   to Ken Lesniak.
  46
  47 -------------------------------------------------------------------------------
  48 Driver Notes and Issues
  49 -------------------------------------------------------------------------------
  50
  51 1. Developed on a Dell 320SLi
  52    PCMCIA Card Services 2.6.2
  53    Linux dell 1.2.10 #1 Thu Jun 29 20:23:41 PDT 1995 i386
  54
  55 2. rc.pcmcia may require loading pcmcia_core with io_speed=300:
  56    'insmod pcmcia_core.o io_speed=300'.
  57    This will avoid problems with fast systems which causes rx_framecnt
  58    to return random values.
  59
  60 3. If hot extraction does not work for you, use 'ifconfig eth0 down'
  61    before extraction.
  62
  63 4. There is a bad slow-down problem in this driver.
  64
  65 5. Future: Multicast processing.  In the meantime, do _not_ compile your
  66    kernel with multicast ip enabled.
  67
  68 -------------------------------------------------------------------------------
  69 History
  70 -------------------------------------------------------------------------------
  71 Log: nmclan_cs.c,v
  72  * 2.5.75-ac1 2003/07/11 Alan Cox <alan@redhat.com>
  73  * Fixed hang on card eject as we probe it
  74  * Cleaned up to use new style locking.
  75  *
  76  * Revision 0.16  1995/07/01  06:42:17  rpao
  77  * Bug fix: nmclan_reset() called CardServices incorrectly.
  78  *
  79  * Revision 0.15  1995/05/24  08:09:47  rpao
  80  * Re-implement MULTI_TX dev->tbusy handling.
  81  *
  82  * Revision 0.14  1995/05/23  03:19:30  rpao
  83  * Added, in nmclan_config(), "tuple.Attributes = 0;".
  84  * Modified MACE ID check to ignore chip revision level.
  85  * Avoid tx_free_frames race condition between _start_xmit and _interrupt.
  86  *
  87  * Revision 0.13  1995/05/18  05:56:34  rpao
  88  * Statistics changes.
  89  * Bug fix: nmclan_reset did not enable TX and RX: call restore_multicast_list.
  90  * Bug fix: mace_interrupt checks ~MACE_IMR_DEFAULT.  Fixes driver lockup.
  91  *
  92  * Revision 0.12  1995/05/14  00:12:23  rpao
  93  * Statistics overhaul.
  94  *
  95
  96 95/05/13 rpao   V0.10a
  97                 Bug fix: MACE statistics counters used wrong I/O ports.
  98                 Bug fix: mace_interrupt() needed to allow statistics to be
  99                 processed without RX or TX interrupts pending.
 100 95/05/11 rpao   V0.10
 101                 Multiple transmit request processing.
 102                 Modified statistics to use MACE counters where possible.
 103 95/05/10 rpao   V0.09 Bug fix: Must use IO_DATA_PATH_WIDTH_AUTO.
 104                 *Released
 105 95/05/10 rpao   V0.08
 106                 Bug fix: Make all non-exported functions private by using
 107                 static keyword.
 108                 Bug fix: Test IntrCnt _before_ reading MACE_IR.
 109 95/05/10 rpao   V0.07 Statistics.
 110 95/05/09 rpao   V0.06 Fix rx_framecnt problem by addition of PCIC wait states.
 111
 112 ---------------------------------------------------------------------------- */
 113
 114 #define DRV_NAME        "nmclan_cs"
 115 #define DRV_VERSION     "0.16"
 116
 117
 118 /* ----------------------------------------------------------------------------
 119 Conditional Compilation Options
 120 ---------------------------------------------------------------------------- */
 121
 122 #define MULTI_TX                        0
 123 #define RESET_ON_TIMEOUT                1
 124 #define TX_INTERRUPTABLE                1
 125 #define RESET_XILINX                    0
 126
 127 /* ----------------------------------------------------------------------------
 128 Include Files
 129 ---------------------------------------------------------------------------- */
 130
 131 #include <linux/module.h>
 132 #include <linux/kernel.h>
 133 #include <linux/init.h>
 134 #include <linux/ptrace.h>
 135 #include <linux/slab.h>
 136 #include <linux/string.h>
 137 #include <linux/timer.h>
 138 #include <linux/interrupt.h>
 139 #include <linux/in.h>
 140 #include <linux/delay.h>
 141 #include <linux/ethtool.h>
 142 #include <linux/netdevice.h>
 143 #include <linux/etherdevice.h>
 144 #include <linux/skbuff.h>
 145 #include <linux/if_arp.h>
 146 #include <linux/ioport.h>
 147 #include <linux/bitops.h>
 148
 149 #include <pcmcia/cs_types.h>
 150 #include <pcmcia/cs.h>
 151 #include <pcmcia/cisreg.h>
 152 #include <pcmcia/cistpl.h>
 153 #include <pcmcia/ds.h>
 154
 155 #include <asm/uaccess.h>
 156 #include <asm/io.h>
 157 #include <asm/system.h>
 158
 159 /* ----------------------------------------------------------------------------
 160 Defines
 161 ---------------------------------------------------------------------------- */
 162
 163 #define ETHER_ADDR_LEN                  ETH_ALEN
 164                                         /* 6 bytes in an Ethernet Address */
 165 #define MACE_LADRF_LEN                  8
 166                                         /* 8 bytes in Logical Address Filter */
 167
 168 /* Loop Control Defines */
 169 #define MACE_MAX_IR_ITERATIONS          10
 170 #define MACE_MAX_RX_ITERATIONS          12
 171         /*
 172         TBD: Dean brought this up, and I assumed the hardware would
 173         handle it:
 174
 175         If MACE_MAX_RX_ITERATIONS is > 1, rx_framecnt may still be
 176         non-zero when the isr exits.  We may not get another interrupt
 177         to process the remaining packets for some time.
 178         */
 179
 180 /*
 181 The Am2150 has a Xilinx XC3042 field programmable gate array (FPGA)
 182 which manages the interface between the MACE and the PCMCIA bus.  It
 183 also includes buffer management for the 32K x 8 SRAM to control up to
 184 four transmit and 12 receive frames at a time.
 185 */
 186 #define AM2150_MAX_TX_FRAMES            4
 187 #define AM2150_MAX_RX_FRAMES            12
 188
 189 /* Am2150 Ethernet Card I/O Mapping */
 190 #define AM2150_RCV                      0x00
 191 #define AM2150_XMT                      0x04
 192 #define AM2150_XMT_SKIP                 0x09
 193 #define AM2150_RCV_NEXT                 0x0A
 194 #define AM2150_RCV_FRAME_COUNT          0x0B
 195 #define AM2150_MACE_BANK                0x0C
 196 #define AM2150_MACE_BASE                0x10
 197
 198 /* MACE Registers */
 199 #define MACE_RCVFIFO                    0
 200 #define MACE_XMTFIFO                    1
 201 #define MACE_XMTFC                      2
 202 #define MACE_XMTFS                      3
 203 #define MACE_XMTRC                      4
 204 #define MACE_RCVFC                      5
 205 #define MACE_RCVFS                      6
 206 #define MACE_FIFOFC                     7
 207 #define MACE_IR                         8
 208 #define MACE_IMR                        9
 209 #define MACE_PR                         10
 210 #define MACE_BIUCC                      11
 211 #define MACE_FIFOCC                     12
 212 #define MACE_MACCC                      13
 213 #define MACE_PLSCC                      14
 214 #define MACE_PHYCC                      15
 215 #define MACE_CHIPIDL                    16
 216 #define MACE_CHIPIDH                    17
 217 #define MACE_IAC                        18
 218 /* Reserved */
 219 #define MACE_LADRF                      20
 220 #define MACE_PADR                       21
 221 /* Reserved */
 222 /* Reserved */
 223 #define MACE_MPC                        24
 224 /* Reserved */
 225 #define MACE_RNTPC                      26
 226 #define MACE_RCVCC                      27
 227 /* Reserved */
 228 #define MACE_UTR                        29
 229 #define MACE_RTR1                       30
 230 #define MACE_RTR2                       31
 231
 232 /* MACE Bit Masks */
 233 #define MACE_XMTRC_EXDEF                0x80
 234 #define MACE_XMTRC_XMTRC                0x0F
 235
 236 #define MACE_XMTFS_XMTSV                0x80
 237 #define MACE_XMTFS_UFLO                 0x40
 238 #define MACE_XMTFS_LCOL                 0x20
 239 #define MACE_XMTFS_MORE                 0x10
 240 #define MACE_XMTFS_ONE                  0x08
 241 #define MACE_XMTFS_DEFER                0x04
 242 #define MACE_XMTFS_LCAR                 0x02
 243 #define MACE_XMTFS_RTRY                 0x01
 244
 245 #define MACE_RCVFS_RCVSTS               0xF000
 246 #define MACE_RCVFS_OFLO                 0x8000
 247 #define MACE_RCVFS_CLSN                 0x4000
 248 #define MACE_RCVFS_FRAM                 0x2000
 249 #define MACE_RCVFS_FCS                  0x1000
 250
 251 #define MACE_FIFOFC_RCVFC               0xF0
 252 #define MACE_FIFOFC_XMTFC               0x0F
 253
 254 #define MACE_IR_JAB                     0x80
 255 #define MACE_IR_BABL                    0x40
 256 #define MACE_IR_CERR                    0x20
 257 #define MACE_IR_RCVCCO                  0x10
 258 #define MACE_IR_RNTPCO                  0x08
 259 #define MACE_IR_MPCO                    0x04
 260 #define MACE_IR_RCVINT                  0x02
 261 #define MACE_IR_XMTINT                  0x01
 262
 263 #define MACE_MACCC_PROM                 0x80
 264 #define MACE_MACCC_DXMT2PD              0x40
 265 #define MACE_MACCC_EMBA                 0x20
 266 #define MACE_MACCC_RESERVED             0x10
 267 #define MACE_MACCC_DRCVPA               0x08
 268 #define MACE_MACCC_DRCVBC               0x04
 269 #define MACE_MACCC_ENXMT                0x02
 270 #define MACE_MACCC_ENRCV                0x01
 271
 272 #define MACE_PHYCC_LNKFL                0x80
 273 #define MACE_PHYCC_DLNKTST              0x40
 274 #define MACE_PHYCC_REVPOL               0x20
 275 #define MACE_PHYCC_DAPC                 0x10
 276 #define MACE_PHYCC_LRT                  0x08
 277 #define MACE_PHYCC_ASEL                 0x04
 278 #define MACE_PHYCC_RWAKE                0x02
 279 #define MACE_PHYCC_AWAKE                0x01
 280
 281 #define MACE_IAC_ADDRCHG                0x80
 282 #define MACE_IAC_PHYADDR                0x04
 283 #define MACE_IAC_LOGADDR                0x02
 284
 285 #define MACE_UTR_RTRE                   0x80
 286 #define MACE_UTR_RTRD                   0x40
 287 #define MACE_UTR_RPA                    0x20
 288 #define MACE_UTR_FCOLL                  0x10
 289 #define MACE_UTR_RCVFCSE                0x08
 290 #define MACE_UTR_LOOP_INCL_MENDEC       0x06
 291 #define MACE_UTR_LOOP_NO_MENDEC         0x04
 292 #define MACE_UTR_LOOP_EXTERNAL          0x02
 293 #define MACE_UTR_LOOP_NONE              0x00
 294 #define MACE_UTR_RESERVED               0x01
 295
 296 /* Switch MACE register bank (only 0 and 1 are valid) */
 297 #define MACEBANK(win_num) outb((win_num), ioaddr + AM2150_MACE_BANK)
 298
 299 #define MACE_IMR_DEFAULT \
 300   (0xFF - \
 301     ( \
 302       MACE_IR_CERR | \
 303       MACE_IR_RCVCCO | \
 304       MACE_IR_RNTPCO | \
 305       MACE_IR_MPCO | \
 306       MACE_IR_RCVINT | \
 307       MACE_IR_XMTINT \
 308     ) \
 309   )
 310 #undef MACE_IMR_DEFAULT
 311 #define MACE_IMR_DEFAULT 0x00 /* New statistics handling: grab everything */
 312
 313 #define TX_TIMEOUT              ((400*HZ)/1000)
 314
 315 /* ----------------------------------------------------------------------------
 316 Type Definitions
 317 ---------------------------------------------------------------------------- */
 318
 319 typedef struct _mace_statistics {
 320     /* MACE_XMTFS */
 321     int xmtsv;
 322     int uflo;
 323     int lcol;
 324     int more;
 325     int one;
 326     int defer;
 327     int lcar;
 328     int rtry;
 329
 330     /* MACE_XMTRC */
 331     int exdef;
 332     int xmtrc;
 333
 334     /* RFS1--Receive Status (RCVSTS) */
 335     int oflo;
 336     int clsn;
 337     int fram;
 338     int fcs;
 339
 340     /* RFS2--Runt Packet Count (RNTPC) */
 341     int rfs_rntpc;
 342
 343     /* RFS3--Receive Collision Count (RCVCC) */
 344     int rfs_rcvcc;
 345
 346     /* MACE_IR */
 347     int jab;
 348     int babl;
 349     int cerr;
 350     int rcvcco;
 351     int rntpco;
 352     int mpco;
 353
 354     /* MACE_MPC */
 355     int mpc;
 356
 357     /* MACE_RNTPC */
 358     int rntpc;
 359
 360     /* MACE_RCVCC */
 361     int rcvcc;
 362 } mace_statistics;
 363
 364 typedef struct _mace_private {
 365         struct pcmcia_device    *p_dev;
 366     dev_node_t node;
 367     struct net_device_stats linux_stats; /* Linux statistics counters */
 368     mace_statistics mace_stats; /* MACE chip statistics counters */
 369
 370     /* restore_multicast_list() state variables */
 371     int multicast_ladrf[MACE_LADRF_LEN]; /* Logical address filter */
 372     int multicast_num_addrs;
 373
 374     char tx_free_frames; /* Number of free transmit frame buffers */
 375     char tx_irq_disabled; /* MACE TX interrupt disabled */
 376
 377     spinlock_t bank_lock; /* Must be held if you step off bank 0 */
 378 } mace_private;
 379
 380 /* ----------------------------------------------------------------------------
 381 Private Global Variables
 382 ---------------------------------------------------------------------------- */
 383
 384 #ifdef PCMCIA_DEBUG
 385 static char rcsid[] =
 386 "nmclan_cs.c,v 0.16 1995/07/01 06:42:17 rpao Exp rpao";
 387 static char *version =
 388 DRV_NAME " " DRV_VERSION " (Roger C. Pao)";
 389 #endif
 390
 391 static const char *if_names[]={
 392     "Auto", "10baseT", "BNC",
 393 };
 394
 395 /* ----------------------------------------------------------------------------
 396 Parameters
 397         These are the parameters that can be set during loading with
 398         'insmod'.
 399 ---------------------------------------------------------------------------- */
 400
 401 MODULE_DESCRIPTION("New Media PCMCIA ethernet driver");
 402 MODULE_LICENSE("GPL");
 403
 404 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
 405
 406 /* 0=auto, 1=10baseT, 2 = 10base2, default=auto */
 407 INT_MODULE_PARM(if_port, 0);
 408
 409 #ifdef PCMCIA_DEBUG
 410 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
 411 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
 412 #else
 413 #define DEBUG(n, args...)
 414 #endif
 415
 416 /* ----------------------------------------------------------------------------
 417 Function Prototypes
 418 ---------------------------------------------------------------------------- */
 419
 420 static int nmclan_config(struct pcmcia_device *link);
 421 static void nmclan_release(struct pcmcia_device *link);
 422
 423 static void nmclan_reset(struct net_device *dev);
 424 static int mace_config(struct net_device *dev, struct ifmap *map);
 425 static int mace_open(struct net_device *dev);
 426 static int mace_close(struct net_device *dev);
 427 static int mace_start_xmit(struct sk_buff *skb, struct net_device *dev);
 428 static void mace_tx_timeout(struct net_device *dev);
 429 static irqreturn_t mace_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 430 static struct net_device_stats *mace_get_stats(struct net_device *dev);
 431 static int mace_rx(struct net_device *dev, unsigned char RxCnt);
 432 static void restore_multicast_list(struct net_device *dev);
 433 static void set_multicast_list(struct net_device *dev);
 434 static struct ethtool_ops netdev_ethtool_ops;
 435
 436
 437 static void nmclan_detach(struct pcmcia_device *p_dev);
 438
 439 /* ----------------------------------------------------------------------------
 440 nmclan_attach
 441         Creates an "instance" of the driver, allocating local data
 442         structures for one device.  The device is registered with Card
 443         Services.
 444 ---------------------------------------------------------------------------- */
 445
 446 static int nmclan_probe(struct pcmcia_device *link)
 447 {
 448     mace_private *lp;
 449     struct net_device *dev;
 450
 451     DEBUG(0, "nmclan_attach()\n");
 452     DEBUG(1, "%s\n", rcsid);
 453
 454     /* Create new ethernet device */
 455     dev = alloc_etherdev(sizeof(mace_private));
 456     if (!dev)
 457             return -ENOMEM;
 458     lp = netdev_priv(dev);
 459     lp->p_dev = link;
 460     link->priv = dev;
 461
 462     spin_lock_init(&lp->bank_lock);
 463     link->io.NumPorts1 = 32;
 464     link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 465     link->io.IOAddrLines = 5;
 466     link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
 467     link->irq.IRQInfo1 = IRQ_LEVEL_ID;
 468     link->irq.Handler = &mace_interrupt;
 469     link->irq.Instance = dev;
 470     link->conf.Attributes = CONF_ENABLE_IRQ;
 471     link->conf.IntType = INT_MEMORY_AND_IO;
 472     link->conf.ConfigIndex = 1;
 473     link->conf.Present = PRESENT_OPTION;
 474
 475     lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
 476
 477     SET_MODULE_OWNER(dev);
 478     dev->hard_start_xmit = &mace_start_xmit;
 479     dev->set_config = &mace_config;
 480     dev->get_stats = &mace_get_stats;
 481     dev->set_multicast_list = &set_multicast_list;
 482     SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
 483     dev->open = &mace_open;
 484     dev->stop = &mace_close;
 485 #ifdef HAVE_TX_TIMEOUT
 486     dev->tx_timeout = mace_tx_timeout;
 487     dev->watchdog_timeo = TX_TIMEOUT;
 488 #endif
 489
 490     return nmclan_config(link);
 491 } /* nmclan_attach */
 492
 493 /* ----------------------------------------------------------------------------
 494 nmclan_detach
 495         This deletes a driver "instance".  The device is de-registered
 496         with Card Services.  If it has been released, all local data
 497         structures are freed.  Otherwise, the structures will be freed
 498         when the device is released.
 499 ---------------------------------------------------------------------------- */
 500
 501 static void nmclan_detach(struct pcmcia_device *link)
 502 {
 503     struct net_device *dev = link->priv;
 504
 505     DEBUG(0, "nmclan_detach(0x%p)\n", link);
 506
 507     if (link->dev_node)
 508         unregister_netdev(dev);
 509
 510     nmclan_release(link);
 511
 512     free_netdev(dev);
 513 } /* nmclan_detach */
 514
 515 /* ----------------------------------------------------------------------------
 516 mace_read
 517         Reads a MACE register.  This is bank independent; however, the
 518         caller must ensure that this call is not interruptable.  We are
 519         assuming that during normal operation, the MACE is always in
 520         bank 0.
 521 ---------------------------------------------------------------------------- */
 522 static int mace_read(mace_private *lp, kio_addr_t ioaddr, int reg)
 523 {
 524   int data = 0xFF;
 525   unsigned long flags;
 526
 527   switch (reg >> 4) {
 528     case 0: /* register 0-15 */
 529       data = inb(ioaddr + AM2150_MACE_BASE + reg);
 530       break;
 531     case 1: /* register 16-31 */
 532       spin_lock_irqsave(&lp->bank_lock, flags);
 533       MACEBANK(1);
 534       data = inb(ioaddr + AM2150_MACE_BASE + (reg & 0x0F));
 535       MACEBANK(0);
 536       spin_unlock_irqrestore(&lp->bank_lock, flags);
 537       break;
 538   }
 539   return (data & 0xFF);
 540 } /* mace_read */
 541
 542 /* ----------------------------------------------------------------------------
 543 mace_write
 544         Writes to a MACE register.  This is bank independent; however,
 545         the caller must ensure that this call is not interruptable.  We
 546         are assuming that during normal operation, the MACE is always in
 547         bank 0.
 548 ---------------------------------------------------------------------------- */
 549 static void mace_write(mace_private *lp, kio_addr_t ioaddr, int reg, int data)
 550 {
 551   unsigned long flags;
 552
 553   switch (reg >> 4) {
 554     case 0: /* register 0-15 */
 555       outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + reg);
 556       break;
 557     case 1: /* register 16-31 */
 558       spin_lock_irqsave(&lp->bank_lock, flags);
 559       MACEBANK(1);
 560       outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + (reg & 0x0F));
 561       MACEBANK(0);
 562       spin_unlock_irqrestore(&lp->bank_lock, flags);
 563       break;
 564   }
 565 } /* mace_write */
 566
 567 /* ----------------------------------------------------------------------------
 568 mace_init
 569         Resets the MACE chip.
 570 ---------------------------------------------------------------------------- */
 571 static int mace_init(mace_private *lp, kio_addr_t ioaddr, char *enet_addr)
 572 {
 573   int i;
 574   int ct = 0;
 575
 576   /* MACE Software reset */
 577   mace_write(lp, ioaddr, MACE_BIUCC, 1);
 578   while (mace_read(lp, ioaddr, MACE_BIUCC) & 0x01) {
 579     /* Wait for reset bit to be cleared automatically after <= 200ns */;
 580     if(++ct > 500)
 581     {
 582         printk(KERN_ERR "mace: reset failed, card removed ?\n");
 583         return -1;
 584     }
 585     udelay(1);
 586   }
 587   mace_write(lp, ioaddr, MACE_BIUCC, 0);
 588
 589   /* The Am2150 requires that the MACE FIFOs operate in burst mode. */
 590   mace_write(lp, ioaddr, MACE_FIFOCC, 0x0F);
 591
 592   mace_write(lp,ioaddr, MACE_RCVFC, 0); /* Disable Auto Strip Receive */
 593   mace_write(lp, ioaddr, MACE_IMR, 0xFF); /* Disable all interrupts until _open */
 594
 595   /*
 596    * Bit 2-1 PORTSEL[1-0] Port Select.
 597    * 00 AUI/10Base-2
 598    * 01 10Base-T
 599    * 10 DAI Port (reserved in Am2150)
 600    * 11 GPSI
 601    * For this card, only the first two are valid.
 602    * So, PLSCC should be set to
 603    * 0x00 for 10Base-2
 604    * 0x02 for 10Base-T
 605    * Or just set ASEL in PHYCC below!
 606    */
 607   switch (if_port) {
 608     case 1:
 609       mace_write(lp, ioaddr, MACE_PLSCC, 0x02);
 610       break;
 611     case 2:
 612       mace_write(lp, ioaddr, MACE_PLSCC, 0x00);
 613       break;
 614     default:
 615       mace_write(lp, ioaddr, MACE_PHYCC, /* ASEL */ 4);
 616       /* ASEL Auto Select.  When set, the PORTSEL[1-0] bits are overridden,
 617          and the MACE device will automatically select the operating media
 618          interface port. */
 619       break;
 620   }
 621
 622   mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_PHYADDR);
 623   /* Poll ADDRCHG bit */
 624   ct = 0;
 625   while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG)
 626   {
 627         if(++ ct > 500)
 628         {
 629                 printk(KERN_ERR "mace: ADDRCHG timeout, card removed ?\n");
 630                 return -1;
 631         }
 632   }
 633   /* Set PADR register */
 634   for (i = 0; i < ETHER_ADDR_LEN; i++)
 635     mace_write(lp, ioaddr, MACE_PADR, enet_addr[i]);
 636
 637   /* MAC Configuration Control Register should be written last */
 638   /* Let set_multicast_list set this. */
 639   /* mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV); */
 640   mace_write(lp, ioaddr, MACE_MACCC, 0x00);
 641   return 0;
 642 } /* mace_init */
 643
 644 /* ----------------------------------------------------------------------------
 645 nmclan_config
 646         This routine is scheduled to run after a CARD_INSERTION event
 647         is received, to configure the PCMCIA socket, and to make the
 648         ethernet device available to the system.
 649 ---------------------------------------------------------------------------- */
 650
 651 #define CS_CHECK(fn, ret) \
 652   do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
 653
 654 static int nmclan_config(struct pcmcia_device *link)
 655 {
 656   struct net_device *dev = link->priv;
 657   mace_private *lp = netdev_priv(dev);
 658   tuple_t tuple;
 659   cisparse_t parse;
 660   u_char buf[64];
 661   int i, last_ret, last_fn;
 662   kio_addr_t ioaddr;
 663
 664   DEBUG(0, "nmclan_config(0x%p)\n", link);
 665
 666   tuple.Attributes = 0;
 667   tuple.TupleData = buf;
 668   tuple.TupleDataMax = 64;
 669   tuple.TupleOffset = 0;
 670   tuple.DesiredTuple = CISTPL_CONFIG;
 671   CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 672   CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
 673   CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
 674   link->conf.ConfigBase = parse.config.base;
 675
 676   CS_CHECK(RequestIO, pcmcia_request_io(link, &link->io));
 677   CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
 678   CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
 679   dev->irq = link->irq.AssignedIRQ;
 680   dev->base_addr = link->io.BasePort1;
 681
 682   ioaddr = dev->base_addr;
 683
 684   /* Read the ethernet address from the CIS. */
 685   tuple.DesiredTuple = 0x80 /* CISTPL_CFTABLE_ENTRY_MISC */;
 686   tuple.TupleData = buf;
 687   tuple.TupleDataMax = 64;
 688   tuple.TupleOffset = 0;
 689   CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
 690   CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
 691   memcpy(dev->dev_addr, tuple.TupleData, ETHER_ADDR_LEN);
 692
 693   /* Verify configuration by reading the MACE ID. */
 694   {
 695     char sig[2];
 696
 697     sig[0] = mace_read(lp, ioaddr, MACE_CHIPIDL);
 698     sig[1] = mace_read(lp, ioaddr, MACE_CHIPIDH);
 699     if ((sig[0] == 0x40) && ((sig[1] & 0x0F) == 0x09)) {
 700       DEBUG(0, "nmclan_cs configured: mace id=%x %x\n",
 701             sig[0], sig[1]);
 702     } else {
 703       printk(KERN_NOTICE "nmclan_cs: mace id not found: %x %x should"
 704              " be 0x40 0x?9\n", sig[0], sig[1]);
 705       return -ENODEV;
 706     }
 707   }
 708
 709   if(mace_init(lp, ioaddr, dev->dev_addr) == -1)
 710         goto failed;
 711
 712   /* The if_port symbol can be set when the module is loaded */
 713   if (if_port <= 2)
 714     dev->if_port = if_port;
 715   else
 716     printk(KERN_NOTICE "nmclan_cs: invalid if_port requested\n");
 717
 718   link->dev_node = &lp->node;
 719   SET_NETDEV_DEV(dev, &handle_to_dev(link));
 720
 721   i = register_netdev(dev);
 722   if (i != 0) {
 723     printk(KERN_NOTICE "nmclan_cs: register_netdev() failed\n");
 724     link->dev_node = NULL;
 725     goto failed;
 726   }
 727
 728   strcpy(lp->node.dev_name, dev->name);
 729
 730   printk(KERN_INFO "%s: nmclan: port %#3lx, irq %d, %s port, hw_addr ",
 731          dev->name, dev->base_addr, dev->irq, if_names[dev->if_port]);
 732   for (i = 0; i < 6; i++)
 733       printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
 734   return 0;
 735
 736 cs_failed:
 737         cs_error(link, last_fn, last_ret);
 738 failed:
 739         nmclan_release(link);
 740         return -ENODEV;
 741 } /* nmclan_config */
 742
 743 /* ----------------------------------------------------------------------------
 744 nmclan_release
 745         After a card is removed, nmclan_release() will unregister the
 746         net device, and release the PCMCIA configuration.  If the device
 747         is still open, this will be postponed until it is closed.
 748 ---------------------------------------------------------------------------- */
 749 static void nmclan_release(struct pcmcia_device *link)
 750 {
 751         DEBUG(0, "nmclan_release(0x%p)\n", link);
 752         pcmcia_disable_device(link);
 753 }
 754
 755 static int nmclan_suspend(struct pcmcia_device *link)
 756 {
 757         struct net_device *dev = link->priv;
 758
 759         if (link->open)
 760                 netif_device_detach(dev);
 761
 762         return 0;
 763 }
 764
 765 static int nmclan_resume(struct pcmcia_device *link)
 766 {
 767         struct net_device *dev = link->priv;
 768
 769         if (link->open) {
 770                 nmclan_reset(dev);
 771                 netif_device_attach(dev);
 772         }
 773
 774         return 0;
 775 }
 776
 777
 778 /* ----------------------------------------------------------------------------
 779 nmclan_reset
 780         Reset and restore all of the Xilinx and MACE registers.
 781 ---------------------------------------------------------------------------- */
 782 static void nmclan_reset(struct net_device *dev)
 783 {
 784   mace_private *lp = netdev_priv(dev);
 785
 786 #if RESET_XILINX
 787   struct pcmcia_device *link = &lp->link;
 788   conf_reg_t reg;
 789   u_long OrigCorValue;
 790
 791   /* Save original COR value */
 792   reg.Function = 0;
 793   reg.Action = CS_READ;
 794   reg.Offset = CISREG_COR;
 795   reg.Value = 0;
 796   pcmcia_access_configuration_register(link, &reg);
 797   OrigCorValue = reg.Value;
 798
 799   /* Reset Xilinx */
 800   reg.Action = CS_WRITE;
 801   reg.Offset = CISREG_COR;
 802   DEBUG(1, "nmclan_reset: OrigCorValue=0x%lX, resetting...\n",
 803         OrigCorValue);
 804   reg.Value = COR_SOFT_RESET;
 805   pcmcia_access_configuration_register(link, &reg);
 806   /* Need to wait for 20 ms for PCMCIA to finish reset. */
 807
 808   /* Restore original COR configuration index */
 809   reg.Value = COR_LEVEL_REQ | (OrigCorValue & COR_CONFIG_MASK);
 810   pcmcia_access_configuration_register(link, &reg);
 811   /* Xilinx is now completely reset along with the MACE chip. */
 812   lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
 813
 814 #endif /* #if RESET_XILINX */
 815
 816   /* Xilinx is now completely reset along with the MACE chip. */
 817   lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
 818
 819   /* Reinitialize the MACE chip for operation. */
 820   mace_init(lp, dev->base_addr, dev->dev_addr);
 821   mace_write(lp, dev->base_addr, MACE_IMR, MACE_IMR_DEFAULT);
 822
 823   /* Restore the multicast list and enable TX and RX. */
 824   restore_multicast_list(dev);
 825 } /* nmclan_reset */
 826
 827 /* ----------------------------------------------------------------------------
 828 mace_config
 829         [Someone tell me what this is supposed to do?  Is if_port a defined
 830         standard?  If so, there should be defines to indicate 1=10Base-T,
 831         2=10Base-2, etc. including limited automatic detection.]
 832 ---------------------------------------------------------------------------- */
 833 static int mace_config(struct net_device *dev, struct ifmap *map)
 834 {
 835   if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
 836     if (map->port <= 2) {
 837       dev->if_port = map->port;
 838       printk(KERN_INFO "%s: switched to %s port\n", dev->name,
 839              if_names[dev->if_port]);
 840     } else
 841       return -EINVAL;
 842   }
 843   return 0;
 844 } /* mace_config */
 845
 846 /* ----------------------------------------------------------------------------
 847 mace_open
 848         Open device driver.
 849 ---------------------------------------------------------------------------- */
 850 static int mace_open(struct net_device *dev)
 851 {
 852   kio_addr_t ioaddr = dev->base_addr;
 853   mace_private *lp = netdev_priv(dev);
 854   struct pcmcia_device *link = lp->p_dev;
 855
 856   if (!pcmcia_dev_present(link))
 857     return -ENODEV;
 858
 859   link->open++;
 860
 861   MACEBANK(0);
 862
 863   netif_start_queue(dev);
 864   nmclan_reset(dev);
 865
 866   return 0; /* Always succeed */
 867 } /* mace_open */
 868
 869 /* ----------------------------------------------------------------------------
 870 mace_close
 871         Closes device driver.
 872 ---------------------------------------------------------------------------- */
 873 static int mace_close(struct net_device *dev)
 874 {
 875   kio_addr_t ioaddr = dev->base_addr;
 876   mace_private *lp = netdev_priv(dev);
 877   struct pcmcia_device *link = lp->p_dev;
 878
 879   DEBUG(2, "%s: shutting down ethercard.\n", dev->name);
 880
 881   /* Mask off all interrupts from the MACE chip. */
 882   outb(0xFF, ioaddr + AM2150_MACE_BASE + MACE_IMR);
 883
 884   link->open--;
 885   netif_stop_queue(dev);
 886
 887   return 0;
 888 } /* mace_close */
 889
 890 static void netdev_get_drvinfo(struct net_device *dev,
 891                                struct ethtool_drvinfo *info)
 892 {
 893         strcpy(info->driver, DRV_NAME);
 894         strcpy(info->version, DRV_VERSION);
 895         sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
 896 }
 897
 898 #ifdef PCMCIA_DEBUG
 899 static u32 netdev_get_msglevel(struct net_device *dev)
 900 {
 901         return pc_debug;
 902 }
 903
 904 static void netdev_set_msglevel(struct net_device *dev, u32 level)
 905 {
 906         pc_debug = level;
 907 }
 908 #endif /* PCMCIA_DEBUG */
 909
 910 static struct ethtool_ops netdev_ethtool_ops = {
 911         .get_drvinfo            = netdev_get_drvinfo,
 912 #ifdef PCMCIA_DEBUG
 913         .get_msglevel           = netdev_get_msglevel,
 914         .set_msglevel           = netdev_set_msglevel,
 915 #endif /* PCMCIA_DEBUG */
 916 };
 917
 918 /* ----------------------------------------------------------------------------
 919 mace_start_xmit
 920         This routine begins the packet transmit function.  When completed,
 921         it will generate a transmit interrupt.
 922
 923         According to /usr/src/linux/net/inet/dev.c, if _start_xmit
 924         returns 0, the "packet is now solely the responsibility of the
 925         driver."  If _start_xmit returns non-zero, the "transmission
 926         failed, put skb back into a list."
 927 ---------------------------------------------------------------------------- */
 928
 929 static void mace_tx_timeout(struct net_device *dev)
 930 {
 931   mace_private *lp = netdev_priv(dev);
 932   struct pcmcia_device *link = lp->p_dev;
 933
 934   printk(KERN_NOTICE "%s: transmit timed out -- ", dev->name);
 935 #if RESET_ON_TIMEOUT
 936   printk("resetting card\n");
 937   pcmcia_reset_card(link, NULL);
 938 #else /* #if RESET_ON_TIMEOUT */
 939   printk("NOT resetting card\n");
 940 #endif /* #if RESET_ON_TIMEOUT */
 941   dev->trans_start = jiffies;
 942   netif_wake_queue(dev);
 943 }
 944
 945 static int mace_start_xmit(struct sk_buff *skb, struct net_device *dev)
 946 {
 947   mace_private *lp = netdev_priv(dev);
 948   kio_addr_t ioaddr = dev->base_addr;
 949
 950   netif_stop_queue(dev);
 951
 952   DEBUG(3, "%s: mace_start_xmit(length = %ld) called.\n",
 953         dev->name, (long)skb->len);
 954
 955 #if (!TX_INTERRUPTABLE)
 956   /* Disable MACE TX interrupts. */
 957   outb(MACE_IMR_DEFAULT | MACE_IR_XMTINT,
 958     ioaddr + AM2150_MACE_BASE + MACE_IMR);
 959   lp->tx_irq_disabled=1;
 960 #endif /* #if (!TX_INTERRUPTABLE) */
 961
 962   {
 963     /* This block must not be interrupted by another transmit request!
 964        mace_tx_timeout will take care of timer-based retransmissions from
 965        the upper layers.  The interrupt handler is guaranteed never to
 966        service a transmit interrupt while we are in here.
 967     */
 968
 969     lp->linux_stats.tx_bytes += skb->len;
 970     lp->tx_free_frames--;
 971
 972     /* WARNING: Write the _exact_ number of bytes written in the header! */
 973     /* Put out the word header [must be an outw()] . . . */
 974     outw(skb->len, ioaddr + AM2150_XMT);
 975     /* . . . and the packet [may be any combination of outw() and outb()] */
 976     outsw(ioaddr + AM2150_XMT, skb->data, skb->len >> 1);
 977     if (skb->len & 1) {
 978       /* Odd byte transfer */
 979       outb(skb->data[skb->len-1], ioaddr + AM2150_XMT);
 980     }
 981
 982     dev->trans_start = jiffies;
 983
 984 #if MULTI_TX
 985     if (lp->tx_free_frames > 0)
 986       netif_start_queue(dev);
 987 #endif /* #if MULTI_TX */
 988   }
 989
 990 #if (!TX_INTERRUPTABLE)
 991   /* Re-enable MACE TX interrupts. */
 992   lp->tx_irq_disabled=0;
 993   outb(MACE_IMR_DEFAULT, ioaddr + AM2150_MACE_BASE + MACE_IMR);
 994 #endif /* #if (!TX_INTERRUPTABLE) */
 995
 996   dev_kfree_skb(skb);
 997
 998   return 0;
 999 } /* mace_start_xmit */
1000
1001 /* ----------------------------------------------------------------------------
1002 mace_interrupt
1003         The interrupt handler.
1004 ---------------------------------------------------------------------------- */
1005 static irqreturn_t mace_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1006 {
1007   struct net_device *dev = (struct net_device *) dev_id;
1008   mace_private *lp = netdev_priv(dev);
1009   kio_addr_t ioaddr = dev->base_addr;
1010   int status;
1011   int IntrCnt = MACE_MAX_IR_ITERATIONS;
1012
1013   if (dev == NULL) {
1014     DEBUG(2, "mace_interrupt(): irq 0x%X for unknown device.\n",
1015           irq);
1016     return IRQ_NONE;
1017   }
1018
1019   if (lp->tx_irq_disabled) {
1020     printk(
1021       (lp->tx_irq_disabled?
1022        KERN_NOTICE "%s: Interrupt with tx_irq_disabled "
1023        "[isr=%02X, imr=%02X]\n":
1024        KERN_NOTICE "%s: Re-entering the interrupt handler "
1025        "[isr=%02X, imr=%02X]\n"),
1026       dev->name,
1027       inb(ioaddr + AM2150_MACE_BASE + MACE_IR),
1028       inb(ioaddr + AM2150_MACE_BASE + MACE_IMR)
1029     );
1030     /* WARNING: MACE_IR has been read! */
1031     return IRQ_NONE;
1032   }
1033
1034   if (!netif_device_present(dev)) {
1035     DEBUG(2, "%s: interrupt from dead card\n", dev->name);
1036     return IRQ_NONE;
1037   }
1038
1039   do {
1040     /* WARNING: MACE_IR is a READ/CLEAR port! */
1041     status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR);
1042
1043     DEBUG(3, "mace_interrupt: irq 0x%X status 0x%X.\n", irq, status);
1044
1045     if (status & MACE_IR_RCVINT) {
1046       mace_rx(dev, MACE_MAX_RX_ITERATIONS);
1047     }
1048
1049     if (status & MACE_IR_XMTINT) {
1050       unsigned char fifofc;
1051       unsigned char xmtrc;
1052       unsigned char xmtfs;
1053
1054       fifofc = inb(ioaddr + AM2150_MACE_BASE + MACE_FIFOFC);
1055       if ((fifofc & MACE_FIFOFC_XMTFC)==0) {
1056         lp->linux_stats.tx_errors++;
1057         outb(0xFF, ioaddr + AM2150_XMT_SKIP);
1058       }
1059
1060       /* Transmit Retry Count (XMTRC, reg 4) */
1061       xmtrc = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTRC);
1062       if (xmtrc & MACE_XMTRC_EXDEF) lp->mace_stats.exdef++;
1063       lp->mace_stats.xmtrc += (xmtrc & MACE_XMTRC_XMTRC);
1064
1065       if (
1066         (xmtfs = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTFS)) &
1067         MACE_XMTFS_XMTSV /* Transmit Status Valid */
1068       ) {
1069         lp->mace_stats.xmtsv++;
1070
1071         if (xmtfs & ~MACE_XMTFS_XMTSV) {
1072           if (xmtfs & MACE_XMTFS_UFLO) {
1073             /* Underflow.  Indicates that the Transmit FIFO emptied before
1074                the end of frame was reached. */
1075             lp->mace_stats.uflo++;
1076           }
1077           if (xmtfs & MACE_XMTFS_LCOL) {
1078             /* Late Collision */
1079             lp->mace_stats.lcol++;
1080           }
1081           if (xmtfs & MACE_XMTFS_MORE) {
1082             /* MORE than one retry was needed */
1083             lp->mace_stats.more++;
1084           }
1085           if (xmtfs & MACE_XMTFS_ONE) {
1086             /* Exactly ONE retry occurred */
1087             lp->mace_stats.one++;
1088           }
1089           if (xmtfs & MACE_XMTFS_DEFER) {
1090             /* Transmission was defered */
1091             lp->mace_stats.defer++;
1092           }
1093           if (xmtfs & MACE_XMTFS_LCAR) {
1094             /* Loss of carrier */
1095             lp->mace_stats.lcar++;
1096           }
1097           if (xmtfs & MACE_XMTFS_RTRY) {
1098             /* Retry error: transmit aborted after 16 attempts */
1099             lp->mace_stats.rtry++;
1100           }
1101         } /* if (xmtfs & ~MACE_XMTFS_XMTSV) */
1102
1103       } /* if (xmtfs & MACE_XMTFS_XMTSV) */
1104
1105       lp->linux_stats.tx_packets++;
1106       lp->tx_free_frames++;
1107       netif_wake_queue(dev);
1108     } /* if (status & MACE_IR_XMTINT) */
1109
1110     if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) {
1111       if (status & MACE_IR_JAB) {
1112         /* Jabber Error.  Excessive transmit duration (20-150ms). */
1113         lp->mace_stats.jab++;
1114       }
1115       if (status & MACE_IR_BABL) {
1116         /* Babble Error.  >1518 bytes transmitted. */
1117         lp->mace_stats.babl++;
1118       }
1119       if (status & MACE_IR_CERR) {
1120         /* Collision Error.  CERR indicates the absence of the
1121            Signal Quality Error Test message after a packet
1122            transmission. */
1123         lp->mace_stats.cerr++;
1124       }
1125       if (status & MACE_IR_RCVCCO) {
1126         /* Receive Collision Count Overflow; */
1127         lp->mace_stats.rcvcco++;
1128       }
1129       if (status & MACE_IR_RNTPCO) {
1130         /* Runt Packet Count Overflow */
1131         lp->mace_stats.rntpco++;
1132       }
1133       if (status & MACE_IR_MPCO) {
1134         /* Missed Packet Count Overflow */
1135         lp->mace_stats.mpco++;
1136       }
1137     } /* if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) */
1138
1139   } while ((status & ~MACE_IMR_DEFAULT) && (--IntrCnt));
1140
1141   return IRQ_HANDLED;
1142 } /* mace_interrupt */
1143
1144 /* ----------------------------------------------------------------------------
1145 mace_rx
1146         Receives packets.
1147 ---------------------------------------------------------------------------- */
1148 static int mace_rx(struct net_device *dev, unsigned char RxCnt)
1149 {
1150   mace_private *lp = netdev_priv(dev);
1151   kio_addr_t ioaddr = dev->base_addr;
1152   unsigned char rx_framecnt;
1153   unsigned short rx_status;
1154
1155   while (
1156     ((rx_framecnt = inb(ioaddr + AM2150_RCV_FRAME_COUNT)) > 0) &&
1157     (rx_framecnt <= 12) && /* rx_framecnt==0xFF if card is extracted. */
1158     (RxCnt--)
1159   ) {
1160     rx_status = inw(ioaddr + AM2150_RCV);
1161
1162     DEBUG(3, "%s: in mace_rx(), framecnt 0x%X, rx_status"
1163           " 0x%X.\n", dev->name, rx_framecnt, rx_status);
1164
1165     if (rx_status & MACE_RCVFS_RCVSTS) { /* Error, update stats. */
1166       lp->linux_stats.rx_errors++;
1167       if (rx_status & MACE_RCVFS_OFLO) {
1168         lp->mace_stats.oflo++;
1169       }
1170       if (rx_status & MACE_RCVFS_CLSN) {
1171         lp->mace_stats.clsn++;
1172       }
1173       if (rx_status & MACE_RCVFS_FRAM) {
1174         lp->mace_stats.fram++;
1175       }
1176       if (rx_status & MACE_RCVFS_FCS) {
1177         lp->mace_stats.fcs++;
1178       }
1179     } else {
1180       short pkt_len = (rx_status & ~MACE_RCVFS_RCVSTS) - 4;
1181         /* Auto Strip is off, always subtract 4 */
1182       struct sk_buff *skb;
1183
1184       lp->mace_stats.rfs_rntpc += inb(ioaddr + AM2150_RCV);
1185         /* runt packet count */
1186       lp->mace_stats.rfs_rcvcc += inb(ioaddr + AM2150_RCV);
1187         /* rcv collision count */
1188
1189       DEBUG(3, "    receiving packet size 0x%X rx_status"
1190             " 0x%X.\n", pkt_len, rx_status);
1191
1192       skb = dev_alloc_skb(pkt_len+2);
1193
1194       if (skb != NULL) {
1195         skb->dev = dev;
1196
1197         skb_reserve(skb, 2);
1198         insw(ioaddr + AM2150_RCV, skb_put(skb, pkt_len), pkt_len>>1);
1199         if (pkt_len & 1)
1200             *(skb->tail-1) = inb(ioaddr + AM2150_RCV);
1201         skb->protocol = eth_type_trans(skb, dev);
1202
1203         netif_rx(skb); /* Send the packet to the upper (protocol) layers. */
1204
1205         dev->last_rx = jiffies;
1206         lp->linux_stats.rx_packets++;
1207         lp->linux_stats.rx_bytes += pkt_len;
1208         outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */
1209         continue;
1210       } else {
1211         DEBUG(1, "%s: couldn't allocate a sk_buff of size"
1212               " %d.\n", dev->name, pkt_len);
1213         lp->linux_stats.rx_dropped++;
1214       }
1215     }
1216     outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */
1217   } /* while */
1218
1219   return 0;
1220 } /* mace_rx */
1221
1222 /* ----------------------------------------------------------------------------
1223 pr_linux_stats
1224 ---------------------------------------------------------------------------- */
1225 static void pr_linux_stats(struct net_device_stats *pstats)
1226 {
1227   DEBUG(2, "pr_linux_stats\n");
1228   DEBUG(2, " rx_packets=%-7ld        tx_packets=%ld\n",
1229         (long)pstats->rx_packets, (long)pstats->tx_packets);
1230   DEBUG(2, " rx_errors=%-7ld         tx_errors=%ld\n",
1231         (long)pstats->rx_errors, (long)pstats->tx_errors);
1232   DEBUG(2, " rx_dropped=%-7ld        tx_dropped=%ld\n",
1233         (long)pstats->rx_dropped, (long)pstats->tx_dropped);
1234   DEBUG(2, " multicast=%-7ld         collisions=%ld\n",
1235         (long)pstats->multicast, (long)pstats->collisions);
1236
1237   DEBUG(2, " rx_length_errors=%-7ld  rx_over_errors=%ld\n",
1238         (long)pstats->rx_length_errors, (long)pstats->rx_over_errors);
1239   DEBUG(2, " rx_crc_errors=%-7ld     rx_frame_errors=%ld\n",
1240         (long)pstats->rx_crc_errors, (long)pstats->rx_frame_errors);
1241   DEBUG(2, " rx_fifo_errors=%-7ld    rx_missed_errors=%ld\n",
1242         (long)pstats->rx_fifo_errors, (long)pstats->rx_missed_errors);
1243
1244   DEBUG(2, " tx_aborted_errors=%-7ld tx_carrier_errors=%ld\n",
1245         (long)pstats->tx_aborted_errors, (long)pstats->tx_carrier_errors);
1246   DEBUG(2, " tx_fifo_errors=%-7ld    tx_heartbeat_errors=%ld\n",
1247         (long)pstats->tx_fifo_errors, (long)pstats->tx_heartbeat_errors);
1248   DEBUG(2, " tx_window_errors=%ld\n",
1249         (long)pstats->tx_window_errors);
1250 } /* pr_linux_stats */
1251
1252 /* ----------------------------------------------------------------------------
1253 pr_mace_stats
1254 ---------------------------------------------------------------------------- */
1255 static void pr_mace_stats(mace_statistics *pstats)
1256 {
1257   DEBUG(2, "pr_mace_stats\n");
1258
1259   DEBUG(2, " xmtsv=%-7d             uflo=%d\n",
1260         pstats->xmtsv, pstats->uflo);
1261   DEBUG(2, " lcol=%-7d              more=%d\n",
1262         pstats->lcol, pstats->more);
1263   DEBUG(2, " one=%-7d               defer=%d\n",
1264         pstats->one, pstats->defer);
1265   DEBUG(2, " lcar=%-7d              rtry=%d\n",
1266         pstats->lcar, pstats->rtry);
1267
1268   /* MACE_XMTRC */
1269   DEBUG(2, " exdef=%-7d             xmtrc=%d\n",
1270         pstats->exdef, pstats->xmtrc);
1271
1272   /* RFS1--Receive Status (RCVSTS) */
1273   DEBUG(2, " oflo=%-7d              clsn=%d\n",
1274         pstats->oflo, pstats->clsn);
1275   DEBUG(2, " fram=%-7d              fcs=%d\n",
1276         pstats->fram, pstats->fcs);
1277
1278   /* RFS2--Runt Packet Count (RNTPC) */
1279   /* RFS3--Receive Collision Count (RCVCC) */
1280   DEBUG(2, " rfs_rntpc=%-7d         rfs_rcvcc=%d\n",
1281         pstats->rfs_rntpc, pstats->rfs_rcvcc);
1282
1283   /* MACE_IR */
1284   DEBUG(2, " jab=%-7d               babl=%d\n",
1285         pstats->jab, pstats->babl);
1286   DEBUG(2, " cerr=%-7d              rcvcco=%d\n",
1287         pstats->cerr, pstats->rcvcco);
1288   DEBUG(2, " rntpco=%-7d            mpco=%d\n",
1289         pstats->rntpco, pstats->mpco);
1290
1291   /* MACE_MPC */
1292   DEBUG(2, " mpc=%d\n", pstats->mpc);
1293
1294   /* MACE_RNTPC */
1295   DEBUG(2, " rntpc=%d\n", pstats->rntpc);
1296
1297   /* MACE_RCVCC */
1298   DEBUG(2, " rcvcc=%d\n", pstats->rcvcc);
1299
1300 } /* pr_mace_stats */
1301
1302 /* ----------------------------------------------------------------------------
1303 update_stats
1304         Update statistics.  We change to register window 1, so this
1305         should be run single-threaded if the device is active. This is
1306         expected to be a rare operation, and it's simpler for the rest
1307         of the driver to assume that window 0 is always valid rather
1308         than use a special window-state variable.
1309
1310         oflo & uflo should _never_ occur since it would mean the Xilinx
1311         was not able to transfer data between the MACE FIFO and the
1312         card's SRAM fast enough.  If this happens, something is
1313         seriously wrong with the hardware.
1314 ---------------------------------------------------------------------------- */
1315 static void update_stats(kio_addr_t ioaddr, struct net_device *dev)
1316 {
1317   mace_private *lp = netdev_priv(dev);
1318
1319   lp->mace_stats.rcvcc += mace_read(lp, ioaddr, MACE_RCVCC);
1320   lp->mace_stats.rntpc += mace_read(lp, ioaddr, MACE_RNTPC);
1321   lp->mace_stats.mpc += mace_read(lp, ioaddr, MACE_MPC);
1322   /* At this point, mace_stats is fully updated for this call.
1323      We may now update the linux_stats. */
1324
1325   /* The MACE has no equivalent for linux_stats field which are commented
1326      out. */
1327
1328   /* lp->linux_stats.multicast; */
1329   lp->linux_stats.collisions =
1330     lp->mace_stats.rcvcco * 256 + lp->mace_stats.rcvcc;
1331     /* Collision: The MACE may retry sending a packet 15 times
1332        before giving up.  The retry count is in XMTRC.
1333        Does each retry constitute a collision?
1334        If so, why doesn't the RCVCC record these collisions? */
1335
1336   /* detailed rx_errors: */
1337   lp->linux_stats.rx_length_errors =
1338     lp->mace_stats.rntpco * 256 + lp->mace_stats.rntpc;
1339   /* lp->linux_stats.rx_over_errors */
1340   lp->linux_stats.rx_crc_errors = lp->mace_stats.fcs;
1341   lp->linux_stats.rx_frame_errors = lp->mace_stats.fram;
1342   lp->linux_stats.rx_fifo_errors = lp->mace_stats.oflo;
1343   lp->linux_stats.rx_missed_errors =
1344     lp->mace_stats.mpco * 256 + lp->mace_stats.mpc;
1345
1346   /* detailed tx_errors */
1347   lp->linux_stats.tx_aborted_errors = lp->mace_stats.rtry;
1348   lp->linux_stats.tx_carrier_errors = lp->mace_stats.lcar;
1349     /* LCAR usually results from bad cabling. */
1350   lp->linux_stats.tx_fifo_errors = lp->mace_stats.uflo;
1351   lp->linux_stats.tx_heartbeat_errors = lp->mace_stats.cerr;
1352   /* lp->linux_stats.tx_window_errors; */
1353
1354   return;
1355 } /* update_stats */
1356
1357 /* ----------------------------------------------------------------------------
1358 mace_get_stats
1359         Gathers ethernet statistics from the MACE chip.
1360 ---------------------------------------------------------------------------- */
1361 static struct net_device_stats *mace_get_stats(struct net_device *dev)
1362 {
1363   mace_private *lp = netdev_priv(dev);
1364
1365   update_stats(dev->base_addr, dev);
1366
1367   DEBUG(1, "%s: updating the statistics.\n", dev->name);
1368   pr_linux_stats(&lp->linux_stats);
1369   pr_mace_stats(&lp->mace_stats);
1370
1371   return &lp->linux_stats;
1372 } /* net_device_stats */
1373
1374 /* ----------------------------------------------------------------------------
1375 updateCRC
1376         Modified from Am79C90 data sheet.
1377 ---------------------------------------------------------------------------- */
1378
1379 #ifdef BROKEN_MULTICAST
1380
1381 static void updateCRC(int *CRC, int bit)
1382 {
1383   int poly[]={
1384     1,1,1,0, 1,1,0,1,
1385     1,0,1,1, 1,0,0,0,
1386     1,0,0,0, 0,0,1,1,
1387     0,0,1,0, 0,0,0,0
1388   }; /* CRC polynomial.  poly[n] = coefficient of the x**n term of the
1389         CRC generator polynomial. */
1390
1391   int j;
1392
1393   /* shift CRC and control bit (CRC[32]) */
1394   for (j = 32; j > 0; j--)
1395     CRC[j] = CRC[j-1];
1396   CRC[0] = 0;
1397
1398   /* If bit XOR(control bit) = 1, set CRC = CRC XOR polynomial. */
1399   if (bit ^ CRC[32])
1400     for (j = 0; j < 32; j++)
1401       CRC[j] ^= poly[j];
1402 } /* updateCRC */
1403
1404 /* ----------------------------------------------------------------------------
1405 BuildLAF
1406         Build logical address filter.
1407         Modified from Am79C90 data sheet.
1408
1409 Input
1410         ladrf: logical address filter (contents initialized to 0)
1411         adr: ethernet address
1412 ---------------------------------------------------------------------------- */
1413 static void BuildLAF(int *ladrf, int *adr)
1414 {
1415   int CRC[33]={1}; /* CRC register, 1 word/bit + extra control bit */
1416
1417   int i, byte; /* temporary array indices */
1418   int hashcode; /* the output object */
1419
1420   CRC[32]=0;
1421
1422   for (byte = 0; byte < 6; byte++)
1423     for (i = 0; i < 8; i++)
1424       updateCRC(CRC, (adr[byte] >> i) & 1);
1425
1426   hashcode = 0;
1427   for (i = 0; i < 6; i++)
1428     hashcode = (hashcode << 1) + CRC[i];
1429
1430   byte = hashcode >> 3;
1431   ladrf[byte] |= (1 << (hashcode & 7));
1432
1433 #ifdef PCMCIA_DEBUG
1434   if (pc_debug > 2) {
1435     printk(KERN_DEBUG "    adr =");
1436     for (i = 0; i < 6; i++)
1437       printk(" %02X", adr[i]);
1438     printk("\n" KERN_DEBUG "    hashcode = %d(decimal), ladrf[0:63]"
1439            " =", hashcode);
1440     for (i = 0; i < 8; i++)
1441       printk(" %02X", ladrf[i]);
1442     printk("\n");
1443   }
1444 #endif
1445 } /* BuildLAF */
1446
1447 /* ----------------------------------------------------------------------------
1448 restore_multicast_list
1449         Restores the multicast filter for MACE chip to the last
1450         set_multicast_list() call.
1451
1452 Input
1453         multicast_num_addrs
1454         multicast_ladrf[]
1455 ---------------------------------------------------------------------------- */
1456 static void restore_multicast_list(struct net_device *dev)
1457 {
1458   mace_private *lp = netdev_priv(dev);
1459   int num_addrs = lp->multicast_num_addrs;
1460   int *ladrf = lp->multicast_ladrf;
1461   kio_addr_t ioaddr = dev->base_addr;
1462   int i;
1463
1464   DEBUG(2, "%s: restoring Rx mode to %d addresses.\n",
1465         dev->name, num_addrs);
1466
1467   if (num_addrs > 0) {
1468
1469     DEBUG(1, "Attempt to restore multicast list detected.\n");
1470
1471     mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_LOGADDR);
1472     /* Poll ADDRCHG bit */
1473     while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG)
1474       ;
1475     /* Set LADRF register */
1476     for (i = 0; i < MACE_LADRF_LEN; i++)
1477       mace_write(lp, ioaddr, MACE_LADRF, ladrf[i]);
1478
1479     mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_RCVFCSE | MACE_UTR_LOOP_EXTERNAL);
1480     mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1481
1482   } else if (num_addrs < 0) {
1483
1484     /* Promiscuous mode: receive all packets */
1485     mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1486     mace_write(lp, ioaddr, MACE_MACCC,
1487       MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV
1488     );
1489
1490   } else {
1491
1492     /* Normal mode */
1493     mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1494     mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1495
1496   }
1497 } /* restore_multicast_list */
1498
1499 /* ----------------------------------------------------------------------------
1500 set_multicast_list
1501         Set or clear the multicast filter for this adaptor.
1502
1503 Input
1504         num_addrs == -1 Promiscuous mode, receive all packets
1505         num_addrs == 0  Normal mode, clear multicast list
1506         num_addrs > 0   Multicast mode, receive normal and MC packets, and do
1507                         best-effort filtering.
1508 Output
1509         multicast_num_addrs
1510         multicast_ladrf[]
1511 ---------------------------------------------------------------------------- */
1512
1513 static void set_multicast_list(struct net_device *dev)
1514 {
1515   mace_private *lp = netdev_priv(dev);
1516   int adr[ETHER_ADDR_LEN] = {0}; /* Ethernet address */
1517   int i;
1518   struct dev_mc_list *dmi = dev->mc_list;
1519
1520 #ifdef PCMCIA_DEBUG
1521   if (pc_debug > 1) {
1522     static int old;
1523     if (dev->mc_count != old) {
1524       old = dev->mc_count;
1525       DEBUG(0, "%s: setting Rx mode to %d addresses.\n",
1526             dev->name, old);
1527     }
1528   }
1529 #endif
1530
1531   /* Set multicast_num_addrs. */
1532   lp->multicast_num_addrs = dev->mc_count;
1533
1534   /* Set multicast_ladrf. */
1535   if (num_addrs > 0) {
1536     /* Calculate multicast logical address filter */
1537     memset(lp->multicast_ladrf, 0, MACE_LADRF_LEN);
1538     for (i = 0; i < dev->mc_count; i++) {
1539       memcpy(adr, dmi->dmi_addr, ETHER_ADDR_LEN);
1540       dmi = dmi->next;
1541       BuildLAF(lp->multicast_ladrf, adr);
1542     }
1543   }
1544
1545   restore_multicast_list(dev);
1546
1547 } /* set_multicast_list */
1548
1549 #endif /* BROKEN_MULTICAST */
1550
1551 static void restore_multicast_list(struct net_device *dev)
1552 {
1553   kio_addr_t ioaddr = dev->base_addr;
1554   mace_private *lp = netdev_priv(dev);
1555
1556   DEBUG(2, "%s: restoring Rx mode to %d addresses.\n", dev->name,
1557         lp->multicast_num_addrs);
1558
1559   if (dev->flags & IFF_PROMISC) {
1560     /* Promiscuous mode: receive all packets */
1561     mace_write(lp,ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1562     mace_write(lp, ioaddr, MACE_MACCC,
1563       MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV
1564     );
1565   } else {
1566     /* Normal mode */
1567     mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1568     mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1569   }
1570 } /* restore_multicast_list */
1571
1572 static void set_multicast_list(struct net_device *dev)
1573 {
1574   mace_private *lp = netdev_priv(dev);
1575
1576 #ifdef PCMCIA_DEBUG
1577   if (pc_debug > 1) {
1578     static int old;
1579     if (dev->mc_count != old) {
1580       old = dev->mc_count;
1581       DEBUG(0, "%s: setting Rx mode to %d addresses.\n",
1582             dev->name, old);
1583     }
1584   }
1585 #endif
1586
1587   lp->multicast_num_addrs = dev->mc_count;
1588   restore_multicast_list(dev);
1589
1590 } /* set_multicast_list */
1591
1592 static struct pcmcia_device_id nmclan_ids[] = {
1593         PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "Ethernet", 0x085a850b, 0x00b2e941),
1594         PCMCIA_DEVICE_PROD_ID12("Portable Add-ons", "Ethernet+", 0xebf1d60, 0xad673aaf),
1595         PCMCIA_DEVICE_NULL,
1596 };
1597 MODULE_DEVICE_TABLE(pcmcia, nmclan_ids);
1598
1599 static struct pcmcia_driver nmclan_cs_driver = {
1600         .owner          = THIS_MODULE,
1601         .drv            = {
1602                 .name   = "nmclan_cs",
1603         },
1604         .probe          = nmclan_probe,
1605         .remove         = nmclan_detach,
1606         .id_table       = nmclan_ids,
1607         .suspend        = nmclan_suspend,
1608         .resume         = nmclan_resume,
1609 };
1610
1611 static int __init init_nmclan_cs(void)
1612 {
1613         return pcmcia_register_driver(&nmclan_cs_driver);
1614 }
1615
1616 static void __exit exit_nmclan_cs(void)
1617 {
1618         pcmcia_unregister_driver(&nmclan_cs_driver);
1619 }
1620
1621 module_init(init_nmclan_cs);
1622 module_exit(exit_nmclan_cs);