linux/drivers/net/depca.c
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   1/*  depca.c: A DIGITAL DEPCA & EtherWORKS ethernet driver for linux.
   2
   3    Written 1994, 1995 by David C. Davies.
   4
   5
   6                      Copyright 1994 David C. Davies
   7                                   and
   8                         United States Government
   9         (as represented by the Director, National Security Agency).
  10
  11               Copyright 1995  Digital Equipment Corporation.
  12
  13
  14    This software may be used and distributed according to the terms of
  15    the GNU General Public License, incorporated herein by reference.
  16
  17    This driver is written for the Digital Equipment Corporation series
  18    of DEPCA and EtherWORKS ethernet cards:
  19
  20        DEPCA       (the original)
  21        DE100
  22        DE101
  23        DE200 Turbo
  24        DE201 Turbo
  25        DE202 Turbo (TP BNC)
  26        DE210
  27        DE422       (EISA)
  28
  29    The  driver has been tested on DE100, DE200 and DE202 cards  in  a
  30    relatively busy network. The DE422 has been tested a little.
  31
  32    This  driver will NOT work   for the DE203,  DE204  and DE205 series  of
  33    cards,  since they have  a  new custom ASIC in   place of the AMD  LANCE
  34    chip.  See the 'ewrk3.c'   driver in the  Linux  source tree for running
  35    those cards.
  36
  37    I have benchmarked the driver with a  DE100 at 595kB/s to (542kB/s from)
  38    a DECstation 5000/200.
  39
  40    The author may be reached at davies@maniac.ultranet.com
  41
  42    =========================================================================
  43
  44    The  driver was originally based  on   the 'lance.c' driver from  Donald
  45    Becker   which  is included with  the  standard  driver distribution for
  46    linux.  V0.4  is  a complete  re-write  with only  the kernel  interface
  47    remaining from the original code.
  48
  49    1) Lance.c code in /linux/drivers/net/
  50    2) "Ethernet/IEEE 802.3 Family. 1992 World Network Data Book/Handbook",
  51       AMD, 1992 [(800) 222-9323].
  52    3) "Am79C90 CMOS Local Area Network Controller for Ethernet (C-LANCE)",
  53       AMD, Pub. #17881, May 1993.
  54    4) "Am79C960 PCnet-ISA(tm), Single-Chip Ethernet Controller for ISA",
  55       AMD, Pub. #16907, May 1992
  56    5) "DEC EtherWORKS LC Ethernet Controller Owners Manual",
  57       Digital Equipment corporation, 1990, Pub. #EK-DE100-OM.003
  58    6) "DEC EtherWORKS Turbo Ethernet Controller Owners Manual",
  59       Digital Equipment corporation, 1990, Pub. #EK-DE200-OM.003
  60    7) "DEPCA Hardware Reference Manual", Pub. #EK-DEPCA-PR
  61       Digital Equipment Corporation, 1989
  62    8) "DEC EtherWORKS Turbo_(TP BNC) Ethernet Controller Owners Manual",
  63       Digital Equipment corporation, 1991, Pub. #EK-DE202-OM.001
  64
  65
  66    Peter Bauer's depca.c (V0.5) was referred to when debugging V0.1 of this
  67    driver.
  68
  69    The original DEPCA  card requires that the  ethernet ROM address counter
  70    be enabled to count and has an 8 bit NICSR.  The ROM counter enabling is
  71    only  done when a  0x08 is read as the  first address octet (to minimise
  72    the chances  of writing over some  other hardware's  I/O register).  The
  73    NICSR accesses   have been changed  to  byte accesses  for all the cards
  74    supported by this driver, since there is only one  useful bit in the MSB
  75    (remote boot timeout) and it  is not used.  Also, there  is a maximum of
  76    only 48kB network  RAM for this  card.  My thanks  to Torbjorn Lindh for
  77    help debugging all this (and holding my feet to  the fire until I got it
  78    right).
  79
  80    The DE200  series  boards have  on-board 64kB  RAM for  use  as a shared
  81    memory network  buffer. Only the DE100  cards make use  of a  2kB buffer
  82    mode which has not  been implemented in  this driver (only the 32kB  and
  83    64kB modes are supported [16kB/48kB for the original DEPCA]).
  84
  85    At the most only 2 DEPCA cards can  be supported on  the ISA bus because
  86    there is only provision  for two I/O base addresses  on each card (0x300
  87    and 0x200). The I/O address is detected by searching for a byte sequence
  88    in the Ethernet station address PROM at the expected I/O address for the
  89    Ethernet  PROM.   The shared memory  base   address  is 'autoprobed'  by
  90    looking  for the self  test PROM  and detecting the  card name.   When a
  91    second  DEPCA is  detected,  information  is   placed in the   base_addr
  92    variable of the  next device structure (which  is created if necessary),
  93    thus  enabling ethif_probe  initialization  for the device.  More than 2
  94    EISA cards can  be  supported, but  care will  be  needed assigning  the
  95    shared memory to ensure that each slot has the  correct IRQ, I/O address
  96    and shared memory address assigned.
  97
  98    ************************************************************************
  99
 100    NOTE: If you are using two  ISA DEPCAs, it is  important that you assign
 101    the base memory addresses correctly.   The  driver autoprobes I/O  0x300
 102    then 0x200.  The  base memory address for  the first device must be less
 103    than that of the second so that the auto probe will correctly assign the
 104    I/O and memory addresses on the same card.  I can't think of a way to do
 105    this unambiguously at the moment, since there is nothing on the cards to
 106    tie I/O and memory information together.
 107
 108    I am unable  to  test  2 cards   together for now,    so this  code   is
 109    unchecked. All reports, good or bad, are welcome.
 110
 111    ************************************************************************
 112
 113    The board IRQ   setting must be  at an  unused IRQ which  is auto-probed
 114    using Donald Becker's autoprobe routines. DEPCA and DE100 board IRQs are
 115    {2,3,4,5,7}, whereas the  DE200 is at {5,9,10,11,15}.  Note that IRQ2 is
 116    really IRQ9 in machines with 16 IRQ lines.
 117
 118    No 16MB memory  limitation should exist with this  driver as DMA is  not
 119    used and the common memory area is in low memory on the network card (my
 120    current system has 20MB and I've not had problems yet).
 121
 122    The ability to load this driver as a loadable module has been added. To
 123    utilise this ability, you have to do <8 things:
 124
 125    0) have a copy of the loadable modules code installed on your system.
 126    1) copy depca.c from the  /linux/drivers/net directory to your favourite
 127    temporary directory.
 128    2) if you wish, edit the  source code near  line 1530 to reflect the I/O
 129    address and IRQ you're using (see also 5).
 130    3) compile  depca.c, but include -DMODULE in  the command line to ensure
 131    that the correct bits are compiled (see end of source code).
 132    4) if you are wanting to add a new  card, goto 5. Otherwise, recompile a
 133    kernel with the depca configuration turned off and reboot.
 134    5) insmod depca.o [irq=7] [io=0x200] [mem=0xd0000] [adapter_name=DE100]
 135       [Alan Cox: Changed the code to allow command line irq/io assignments]
 136       [Dave Davies: Changed the code to allow command line mem/name
 137                                                                assignments]
 138    6) run the net startup bits for your eth?? interface manually
 139    (usually /etc/rc.inet[12] at boot time).
 140    7) enjoy!
 141
 142    Note that autoprobing is not allowed in loadable modules - the system is
 143    already up and running and you're messing with interrupts.
 144
 145    To unload a module, turn off the associated interface
 146    'ifconfig eth?? down' then 'rmmod depca'.
 147
 148    To assign a base memory address for the shared memory  when running as a
 149    loadable module, see 5 above.  To include the adapter  name (if you have
 150    no PROM  but know the card name)  also see 5  above. Note that this last
 151    option  will not work  with kernel  built-in  depca's.
 152
 153    The shared memory assignment for a loadable module  makes sense to avoid
 154    the 'memory autoprobe' picking the wrong shared memory  (for the case of
 155    2 depca's in a PC).
 156
 157    ************************************************************************
 158    Support for MCA EtherWORKS cards added 11-3-98.
 159    Verified to work with up to 2 DE212 cards in a system (although not
 160      fully stress-tested).
 161
 162    Currently known bugs/limitations:
 163
 164    Note:  with the MCA stuff as a module, it trusts the MCA configuration,
 165           not the command line for IRQ and memory address.  You can
 166           specify them if you want, but it will throw your values out.
 167           You still have to pass the IO address it was configured as
 168           though.
 169
 170    ************************************************************************
 171    TO DO:
 172    ------
 173
 174
 175    Revision History
 176    ----------------
 177
 178    Version   Date        Description
 179
 180      0.1     25-jan-94   Initial writing.
 181      0.2     27-jan-94   Added LANCE TX hardware buffer chaining.
 182      0.3      1-feb-94   Added multiple DEPCA support.
 183      0.31     4-feb-94   Added DE202 recognition.
 184      0.32    19-feb-94   Tidy up. Improve multi-DEPCA support.
 185      0.33    25-feb-94   Fix DEPCA ethernet ROM counter enable.
 186                          Add jabber packet fix from murf@perftech.com
 187                          and becker@super.org
 188      0.34     7-mar-94   Fix DEPCA max network memory RAM & NICSR access.
 189      0.35     8-mar-94   Added DE201 recognition. Tidied up.
 190      0.351   30-apr-94   Added EISA support. Added DE422 recognition.
 191      0.36    16-may-94   DE422 fix released.
 192      0.37    22-jul-94   Added MODULE support
 193      0.38    15-aug-94   Added DBR ROM switch in depca_close().
 194                          Multi DEPCA bug fix.
 195      0.38axp 15-sep-94   Special version for Alpha AXP Linux V1.0.
 196      0.381   12-dec-94   Added DE101 recognition, fix multicast bug.
 197      0.382    9-feb-95   Fix recognition bug reported by <bkm@star.rl.ac.uk>.
 198      0.383   22-feb-95   Fix for conflict with VESA SCSI reported by
 199                          <stromain@alf.dec.com>
 200      0.384   17-mar-95   Fix a ring full bug reported by <bkm@star.rl.ac.uk>
 201      0.385    3-apr-95   Fix a recognition bug reported by
 202                                                <ryan.niemi@lastfrontier.com>
 203      0.386   21-apr-95   Fix the last fix...sorry, must be galloping senility
 204      0.40    25-May-95   Rewrite for portability & updated.
 205                          ALPHA support from <jestabro@amt.tay1.dec.com>
 206      0.41    26-Jun-95   Added verify_area() calls in depca_ioctl() from
 207                          suggestion by <heiko@colossus.escape.de>
 208      0.42    27-Dec-95   Add 'mem' shared memory assignment for loadable
 209                          modules.
 210                          Add 'adapter_name' for loadable modules when no PROM.
 211                          Both above from a suggestion by
 212                          <pchen@woodruffs121.residence.gatech.edu>.
 213                          Add new multicasting code.
 214      0.421   22-Apr-96   Fix alloc_device() bug <jari@markkus2.fimr.fi>
 215      0.422   29-Apr-96   Fix depca_hw_init() bug <jari@markkus2.fimr.fi>
 216      0.423    7-Jun-96   Fix module load bug <kmg@barco.be>
 217      0.43    16-Aug-96   Update alloc_device() to conform to de4x5.c
 218      0.44     1-Sep-97   Fix *_probe() to test check_region() first - bug
 219                           reported by <mmogilvi@elbert.uccs.edu>
 220      0.45     3-Nov-98   Added support for MCA EtherWORKS (DE210/DE212) cards
 221                           by <tymm@computer.org>
 222      0.451    5-Nov-98   Fixed mca stuff cuz I'm a dummy. <tymm@computer.org>
 223      0.5     14-Nov-98   Re-spin for 2.1.x kernels.
 224      0.51    27-Jun-99   Correct received packet length for CRC from
 225                           report by <worm@dkik.dk>
 226      0.52    16-Oct-00   Fixes for 2.3 io memory accesses
 227                          Fix show-stopper (ints left masked) in depca_interrupt
 228                           by <peterd@pnd-pc.demon.co.uk>
 229      0.53    12-Jan-01   Release resources on failure, bss tidbits
 230                           by acme@conectiva.com.br
 231      0.54    08-Nov-01   use library crc32 functions
 232                           by Matt_Domsch@dell.com
 233      0.55    01-Mar-03   Use EISA/sysfs framework <maz@wild-wind.fr.eu.org>
 234
 235    =========================================================================
 236*/
 237
 238#include <linux/module.h>
 239#include <linux/kernel.h>
 240#include <linux/string.h>
 241#include <linux/errno.h>
 242#include <linux/ioport.h>
 243#include <linux/slab.h>
 244#include <linux/interrupt.h>
 245#include <linux/delay.h>
 246#include <linux/init.h>
 247#include <linux/crc32.h>
 248#include <linux/netdevice.h>
 249#include <linux/etherdevice.h>
 250#include <linux/skbuff.h>
 251#include <linux/time.h>
 252#include <linux/types.h>
 253#include <linux/unistd.h>
 254#include <linux/ctype.h>
 255#include <linux/moduleparam.h>
 256#include <linux/platform_device.h>
 257#include <linux/bitops.h>
 258
 259#include <asm/uaccess.h>
 260#include <asm/io.h>
 261#include <asm/dma.h>
 262
 263#ifdef CONFIG_MCA
 264#include <linux/mca.h>
 265#endif
 266
 267#ifdef CONFIG_EISA
 268#include <linux/eisa.h>
 269#endif
 270
 271#include "depca.h"
 272
 273static char version[] __initdata = "depca.c:v0.53 2001/1/12 davies@maniac.ultranet.com\n";
 274
 275#ifdef DEPCA_DEBUG
 276static int depca_debug = DEPCA_DEBUG;
 277#else
 278static int depca_debug = 1;
 279#endif
 280
 281#define DEPCA_NDA 0xffe0        /* No Device Address */
 282
 283#define TX_TIMEOUT (1*HZ)
 284
 285/*
 286** Ethernet PROM defines
 287*/
 288#define PROBE_LENGTH    32
 289#define ETH_PROM_SIG    0xAA5500FFUL
 290
 291/*
 292** Set the number of Tx and Rx buffers. Ensure that the memory requested
 293** here is <= to the amount of shared memory set up by the board switches.
 294** The number of descriptors MUST BE A POWER OF 2.
 295**
 296** total_memory = NUM_RX_DESC*(8+RX_BUFF_SZ) + NUM_TX_DESC*(8+TX_BUFF_SZ)
 297*/
 298#define NUM_RX_DESC     8       /* Number of RX descriptors */
 299#define NUM_TX_DESC     8       /* Number of TX descriptors */
 300#define RX_BUFF_SZ      1536    /* Buffer size for each Rx buffer */
 301#define TX_BUFF_SZ      1536    /* Buffer size for each Tx buffer */
 302
 303/*
 304** EISA bus defines
 305*/
 306#define DEPCA_EISA_IO_PORTS 0x0c00      /* I/O port base address, slot 0 */
 307
 308/*
 309** ISA Bus defines
 310*/
 311#define DEPCA_RAM_BASE_ADDRESSES {0xc0000,0xd0000,0xe0000,0x00000}
 312#define DEPCA_TOTAL_SIZE 0x10
 313
 314static struct {
 315        u_long iobase;
 316        struct platform_device *device;
 317} depca_io_ports[] = {
 318        { 0x300, NULL },
 319        { 0x200, NULL },
 320        { 0    , NULL },
 321};
 322
 323/*
 324** Name <-> Adapter mapping
 325*/
 326#define DEPCA_SIGNATURE {"DEPCA",\
 327                         "DE100","DE101",\
 328                         "DE200","DE201","DE202",\
 329                         "DE210","DE212",\
 330                         "DE422",\
 331                         ""}
 332
 333static char* __initdata depca_signature[] = DEPCA_SIGNATURE;
 334
 335enum depca_type {
 336        DEPCA, de100, de101, de200, de201, de202, de210, de212, de422, unknown
 337};
 338
 339static char depca_string[] = "depca";
 340
 341static int depca_device_remove (struct device *device);
 342
 343#ifdef CONFIG_EISA
 344static struct eisa_device_id depca_eisa_ids[] = {
 345        { "DEC4220", de422 },
 346        { "" }
 347};
 348MODULE_DEVICE_TABLE(eisa, depca_eisa_ids);
 349
 350static int depca_eisa_probe  (struct device *device);
 351
 352static struct eisa_driver depca_eisa_driver = {
 353        .id_table = depca_eisa_ids,
 354        .driver   = {
 355                .name    = depca_string,
 356                .probe   = depca_eisa_probe,
 357                .remove  = __devexit_p (depca_device_remove)
 358        }
 359};
 360#endif
 361
 362#ifdef CONFIG_MCA
 363/*
 364** Adapter ID for the MCA EtherWORKS DE210/212 adapter
 365*/
 366#define DE210_ID 0x628d
 367#define DE212_ID 0x6def
 368
 369static short depca_mca_adapter_ids[] = {
 370        DE210_ID,
 371        DE212_ID,
 372        0x0000
 373};
 374
 375static char *depca_mca_adapter_name[] = {
 376        "DEC EtherWORKS MC Adapter (DE210)",
 377        "DEC EtherWORKS MC Adapter (DE212)",
 378        NULL
 379};
 380
 381static enum depca_type depca_mca_adapter_type[] = {
 382        de210,
 383        de212,
 384        0
 385};
 386
 387static int depca_mca_probe (struct device *);
 388
 389static struct mca_driver depca_mca_driver = {
 390        .id_table = depca_mca_adapter_ids,
 391        .driver   = {
 392                .name   = depca_string,
 393                .bus    = &mca_bus_type,
 394                .probe  = depca_mca_probe,
 395                .remove = __devexit_p(depca_device_remove),
 396        },
 397};
 398#endif
 399
 400static int depca_isa_probe (struct platform_device *);
 401
 402static int __devexit depca_isa_remove(struct platform_device *pdev)
 403{
 404        return depca_device_remove(&pdev->dev);
 405}
 406
 407static struct platform_driver depca_isa_driver = {
 408        .probe  = depca_isa_probe,
 409        .remove = __devexit_p(depca_isa_remove),
 410        .driver = {
 411                .name   = depca_string,
 412        },
 413};
 414
 415/*
 416** Miscellaneous info...
 417*/
 418#define DEPCA_STRLEN 16
 419
 420/*
 421** Memory Alignment. Each descriptor is 4 longwords long. To force a
 422** particular alignment on the TX descriptor, adjust DESC_SKIP_LEN and
 423** DESC_ALIGN. DEPCA_ALIGN aligns the start address of the private memory area
 424** and hence the RX descriptor ring's first entry.
 425*/
 426#define DEPCA_ALIGN4      ((u_long)4 - 1)       /* 1 longword align */
 427#define DEPCA_ALIGN8      ((u_long)8 - 1)       /* 2 longword (quadword) align */
 428#define DEPCA_ALIGN         DEPCA_ALIGN8        /* Keep the LANCE happy... */
 429
 430/*
 431** The DEPCA Rx and Tx ring descriptors.
 432*/
 433struct depca_rx_desc {
 434        volatile s32 base;
 435        s16 buf_length;         /* This length is negative 2's complement! */
 436        s16 msg_length;         /* This length is "normal". */
 437};
 438
 439struct depca_tx_desc {
 440        volatile s32 base;
 441        s16 length;             /* This length is negative 2's complement! */
 442        s16 misc;               /* Errors and TDR info */
 443};
 444
 445#define LA_MASK 0x0000ffff      /* LANCE address mask for mapping network RAM
 446                                   to LANCE memory address space */
 447
 448/*
 449** The Lance initialization block, described in databook, in common memory.
 450*/
 451struct depca_init {
 452        u16 mode;               /* Mode register */
 453        u8 phys_addr[ETH_ALEN]; /* Physical ethernet address */
 454        u8 mcast_table[8];      /* Multicast Hash Table. */
 455        u32 rx_ring;            /* Rx ring base pointer & ring length */
 456        u32 tx_ring;            /* Tx ring base pointer & ring length */
 457};
 458
 459#define DEPCA_PKT_STAT_SZ 16
 460#define DEPCA_PKT_BIN_SZ  128   /* Should be >=100 unless you
 461                                   increase DEPCA_PKT_STAT_SZ */
 462struct depca_private {
 463        char adapter_name[DEPCA_STRLEN];        /* /proc/ioports string                  */
 464        enum depca_type adapter;                /* Adapter type */
 465        enum {
 466                DEPCA_BUS_MCA = 1,
 467                DEPCA_BUS_ISA,
 468                DEPCA_BUS_EISA,
 469        } depca_bus;            /* type of bus */
 470        struct depca_init init_block;   /* Shadow Initialization block            */
 471/* CPU address space fields */
 472        struct depca_rx_desc __iomem *rx_ring;  /* Pointer to start of RX descriptor ring */
 473        struct depca_tx_desc __iomem *tx_ring;  /* Pointer to start of TX descriptor ring */
 474        void __iomem *rx_buff[NUM_RX_DESC];     /* CPU virt address of sh'd memory buffs  */
 475        void __iomem *tx_buff[NUM_TX_DESC];     /* CPU virt address of sh'd memory buffs  */
 476        void __iomem *sh_mem;   /* CPU mapped virt address of device RAM  */
 477        u_long mem_start;       /* Bus address of device RAM (before remap) */
 478        u_long mem_len;         /* device memory size */
 479/* Device address space fields */
 480        u_long device_ram_start;        /* Start of RAM in device addr space      */
 481/* Offsets used in both address spaces */
 482        u_long rx_ring_offset;  /* Offset from start of RAM to rx_ring    */
 483        u_long tx_ring_offset;  /* Offset from start of RAM to tx_ring    */
 484        u_long buffs_offset;    /* LANCE Rx and Tx buffers start address. */
 485/* Kernel-only (not device) fields */
 486        int rx_new, tx_new;     /* The next free ring entry               */
 487        int rx_old, tx_old;     /* The ring entries to be free()ed.       */
 488        spinlock_t lock;
 489        struct {                /* Private stats counters                 */
 490                u32 bins[DEPCA_PKT_STAT_SZ];
 491                u32 unicast;
 492                u32 multicast;
 493                u32 broadcast;
 494                u32 excessive_collisions;
 495                u32 tx_underruns;
 496                u32 excessive_underruns;
 497        } pktStats;
 498        int txRingMask;         /* TX ring mask                           */
 499        int rxRingMask;         /* RX ring mask                           */
 500        s32 rx_rlen;            /* log2(rxRingMask+1) for the descriptors */
 501        s32 tx_rlen;            /* log2(txRingMask+1) for the descriptors */
 502};
 503
 504/*
 505** The transmit ring full condition is described by the tx_old and tx_new
 506** pointers by:
 507**    tx_old            = tx_new    Empty ring
 508**    tx_old            = tx_new+1  Full ring
 509**    tx_old+txRingMask = tx_new    Full ring  (wrapped condition)
 510*/
 511#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
 512                         lp->tx_old+lp->txRingMask-lp->tx_new:\
 513                         lp->tx_old               -lp->tx_new-1)
 514
 515/*
 516** Public Functions
 517*/
 518static int depca_open(struct net_device *dev);
 519static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev);
 520static irqreturn_t depca_interrupt(int irq, void *dev_id);
 521static int depca_close(struct net_device *dev);
 522static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 523static void depca_tx_timeout(struct net_device *dev);
 524static void set_multicast_list(struct net_device *dev);
 525
 526/*
 527** Private functions
 528*/
 529static void depca_init_ring(struct net_device *dev);
 530static int depca_rx(struct net_device *dev);
 531static int depca_tx(struct net_device *dev);
 532
 533static void LoadCSRs(struct net_device *dev);
 534static int InitRestartDepca(struct net_device *dev);
 535static int DepcaSignature(char *name, u_long paddr);
 536static int DevicePresent(u_long ioaddr);
 537static int get_hw_addr(struct net_device *dev);
 538static void SetMulticastFilter(struct net_device *dev);
 539static int load_packet(struct net_device *dev, struct sk_buff *skb);
 540static void depca_dbg_open(struct net_device *dev);
 541
 542static u_char de1xx_irq[] __initdata = { 2, 3, 4, 5, 7, 9, 0 };
 543static u_char de2xx_irq[] __initdata = { 5, 9, 10, 11, 15, 0 };
 544static u_char de422_irq[] __initdata = { 5, 9, 10, 11, 0 };
 545static u_char *depca_irq;
 546
 547static int irq;
 548static int io;
 549static char *adapter_name;
 550static int mem;                 /* For loadable module assignment
 551                                   use insmod mem=0x????? .... */
 552module_param (irq, int, 0);
 553module_param (io, int, 0);
 554module_param (adapter_name, charp, 0);
 555module_param (mem, int, 0);
 556MODULE_PARM_DESC(irq, "DEPCA IRQ number");
 557MODULE_PARM_DESC(io, "DEPCA I/O base address");
 558MODULE_PARM_DESC(adapter_name, "DEPCA adapter name");
 559MODULE_PARM_DESC(mem, "DEPCA shared memory address");
 560MODULE_LICENSE("GPL");
 561
 562/*
 563** Miscellaneous defines...
 564*/
 565#define STOP_DEPCA \
 566    outw(CSR0, DEPCA_ADDR);\
 567    outw(STOP, DEPCA_DATA)
 568
 569static int __init depca_hw_init (struct net_device *dev, struct device *device)
 570{
 571        struct depca_private *lp;
 572        int i, j, offset, netRAM, mem_len, status = 0;
 573        s16 nicsr;
 574        u_long ioaddr;
 575        u_long mem_start;
 576        DECLARE_MAC_BUF(mac);
 577
 578        /*
 579         * We are now supposed to enter this function with the
 580         * following fields filled with proper values :
 581         *
 582         * dev->base_addr
 583         * lp->mem_start
 584         * lp->depca_bus
 585         * lp->adapter
 586         *
 587         * dev->irq can be set if known from device configuration (on
 588         * MCA or EISA) or module option. Otherwise, it will be auto
 589         * detected.
 590         */
 591
 592        ioaddr = dev->base_addr;
 593
 594        STOP_DEPCA;
 595
 596        nicsr = inb(DEPCA_NICSR);
 597        nicsr = ((nicsr & ~SHE & ~RBE & ~IEN) | IM);
 598        outb(nicsr, DEPCA_NICSR);
 599
 600        if (inw(DEPCA_DATA) != STOP) {
 601                return -ENXIO;
 602        }
 603
 604        lp = (struct depca_private *) dev->priv;
 605        mem_start = lp->mem_start;
 606
 607        if (!mem_start || lp->adapter < DEPCA || lp->adapter >=unknown)
 608                return -ENXIO;
 609
 610        printk ("%s: %s at 0x%04lx",
 611                device->bus_id, depca_signature[lp->adapter], ioaddr);
 612
 613        switch (lp->depca_bus) {
 614#ifdef CONFIG_MCA
 615        case DEPCA_BUS_MCA:
 616                printk(" (MCA slot %d)", to_mca_device(device)->slot + 1);
 617                break;
 618#endif
 619
 620#ifdef CONFIG_EISA
 621        case DEPCA_BUS_EISA:
 622                printk(" (EISA slot %d)", to_eisa_device(device)->slot);
 623                break;
 624#endif
 625
 626        case DEPCA_BUS_ISA:
 627                break;
 628
 629        default:
 630                printk("Unknown DEPCA bus %d\n", lp->depca_bus);
 631                return -ENXIO;
 632        }
 633
 634        printk(", h/w address ");
 635        status = get_hw_addr(dev);
 636        printk("%s", print_mac(mac, dev->dev_addr));
 637        if (status != 0) {
 638                printk("      which has an Ethernet PROM CRC error.\n");
 639                return -ENXIO;
 640        }
 641
 642        /* Set up the maximum amount of network RAM(kB) */
 643        netRAM = ((lp->adapter != DEPCA) ? 64 : 48);
 644        if ((nicsr & _128KB) && (lp->adapter == de422))
 645                netRAM = 128;
 646
 647        /* Shared Memory Base Address */
 648        if (nicsr & BUF) {
 649                nicsr &= ~BS;   /* DEPCA RAM in top 32k */
 650                netRAM -= 32;
 651
 652                /* Only EISA/ISA needs start address to be re-computed */
 653                if (lp->depca_bus != DEPCA_BUS_MCA)
 654                        mem_start += 0x8000;
 655        }
 656
 657        if ((mem_len = (NUM_RX_DESC * (sizeof(struct depca_rx_desc) + RX_BUFF_SZ) + NUM_TX_DESC * (sizeof(struct depca_tx_desc) + TX_BUFF_SZ) + sizeof(struct depca_init)))
 658            > (netRAM << 10)) {
 659                printk(",\n       requests %dkB RAM: only %dkB is available!\n", (mem_len >> 10), netRAM);
 660                return -ENXIO;
 661        }
 662
 663        printk(",\n      has %dkB RAM at 0x%.5lx", netRAM, mem_start);
 664
 665        /* Enable the shadow RAM. */
 666        if (lp->adapter != DEPCA) {
 667                nicsr |= SHE;
 668                outb(nicsr, DEPCA_NICSR);
 669        }
 670
 671        spin_lock_init(&lp->lock);
 672        sprintf(lp->adapter_name, "%s (%s)",
 673                depca_signature[lp->adapter], device->bus_id);
 674        status = -EBUSY;
 675
 676        /* Initialisation Block */
 677        if (!request_mem_region (mem_start, mem_len, lp->adapter_name)) {
 678                printk(KERN_ERR "depca: cannot request ISA memory, aborting\n");
 679                goto out_priv;
 680        }
 681
 682        status = -EIO;
 683        lp->sh_mem = ioremap(mem_start, mem_len);
 684        if (lp->sh_mem == NULL) {
 685                printk(KERN_ERR "depca: cannot remap ISA memory, aborting\n");
 686                goto out1;
 687        }
 688
 689        lp->mem_start = mem_start;
 690        lp->mem_len   = mem_len;
 691        lp->device_ram_start = mem_start & LA_MASK;
 692
 693        offset = 0;
 694        offset += sizeof(struct depca_init);
 695
 696        /* Tx & Rx descriptors (aligned to a quadword boundary) */
 697        offset = (offset + DEPCA_ALIGN) & ~DEPCA_ALIGN;
 698        lp->rx_ring = (struct depca_rx_desc __iomem *) (lp->sh_mem + offset);
 699        lp->rx_ring_offset = offset;
 700
 701        offset += (sizeof(struct depca_rx_desc) * NUM_RX_DESC);
 702        lp->tx_ring = (struct depca_tx_desc __iomem *) (lp->sh_mem + offset);
 703        lp->tx_ring_offset = offset;
 704
 705        offset += (sizeof(struct depca_tx_desc) * NUM_TX_DESC);
 706
 707        lp->buffs_offset = offset;
 708
 709        /* Finish initialising the ring information. */
 710        lp->rxRingMask = NUM_RX_DESC - 1;
 711        lp->txRingMask = NUM_TX_DESC - 1;
 712
 713        /* Calculate Tx/Rx RLEN size for the descriptors. */
 714        for (i = 0, j = lp->rxRingMask; j > 0; i++) {
 715                j >>= 1;
 716        }
 717        lp->rx_rlen = (s32) (i << 29);
 718        for (i = 0, j = lp->txRingMask; j > 0; i++) {
 719                j >>= 1;
 720        }
 721        lp->tx_rlen = (s32) (i << 29);
 722
 723        /* Load the initialisation block */
 724        depca_init_ring(dev);
 725
 726        /* Initialise the control and status registers */
 727        LoadCSRs(dev);
 728
 729        /* Enable DEPCA board interrupts for autoprobing */
 730        nicsr = ((nicsr & ~IM) | IEN);
 731        outb(nicsr, DEPCA_NICSR);
 732
 733        /* To auto-IRQ we enable the initialization-done and DMA err,
 734           interrupts. For now we will always get a DMA error. */
 735        if (dev->irq < 2) {
 736                unsigned char irqnum;
 737                unsigned long irq_mask, delay;
 738
 739                irq_mask = probe_irq_on();
 740
 741                /* Assign the correct irq list */
 742                switch (lp->adapter) {
 743                case DEPCA:
 744                case de100:
 745                case de101:
 746                        depca_irq = de1xx_irq;
 747                        break;
 748                case de200:
 749                case de201:
 750                case de202:
 751                case de210:
 752                case de212:
 753                        depca_irq = de2xx_irq;
 754                        break;
 755                case de422:
 756                        depca_irq = de422_irq;
 757                        break;
 758
 759                default:
 760                        break;  /* Not reached */
 761                }
 762
 763                /* Trigger an initialization just for the interrupt. */
 764                outw(INEA | INIT, DEPCA_DATA);
 765
 766                delay = jiffies + HZ/50;
 767                while (time_before(jiffies, delay))
 768                        yield();
 769
 770                irqnum = probe_irq_off(irq_mask);
 771
 772                status = -ENXIO;
 773                if (!irqnum) {
 774                        printk(" and failed to detect IRQ line.\n");
 775                        goto out2;
 776                } else {
 777                        for (dev->irq = 0, i = 0; (depca_irq[i]) && (!dev->irq); i++)
 778                                if (irqnum == depca_irq[i]) {
 779                                        dev->irq = irqnum;
 780                                        printk(" and uses IRQ%d.\n", dev->irq);
 781                                }
 782
 783                        if (!dev->irq) {
 784                                printk(" but incorrect IRQ line detected.\n");
 785                                goto out2;
 786                        }
 787                }
 788        } else {
 789                printk(" and assigned IRQ%d.\n", dev->irq);
 790        }
 791
 792        if (depca_debug > 1) {
 793                printk(version);
 794        }
 795
 796        /* The DEPCA-specific entries in the device structure. */
 797        dev->open = &depca_open;
 798        dev->hard_start_xmit = &depca_start_xmit;
 799        dev->stop = &depca_close;
 800        dev->set_multicast_list = &set_multicast_list;
 801        dev->do_ioctl = &depca_ioctl;
 802        dev->tx_timeout = depca_tx_timeout;
 803        dev->watchdog_timeo = TX_TIMEOUT;
 804
 805        dev->mem_start = 0;
 806
 807        device->driver_data = dev;
 808        SET_NETDEV_DEV (dev, device);
 809
 810        status = register_netdev(dev);
 811        if (status == 0)
 812                return 0;
 813out2:
 814        iounmap(lp->sh_mem);
 815out1:
 816        release_mem_region (mem_start, mem_len);
 817out_priv:
 818        return status;
 819}
 820
 821
 822static int depca_open(struct net_device *dev)
 823{
 824        struct depca_private *lp = (struct depca_private *) dev->priv;
 825        u_long ioaddr = dev->base_addr;
 826        s16 nicsr;
 827        int status = 0;
 828
 829        STOP_DEPCA;
 830        nicsr = inb(DEPCA_NICSR);
 831
 832        /* Make sure the shadow RAM is enabled */
 833        if (lp->adapter != DEPCA) {
 834                nicsr |= SHE;
 835                outb(nicsr, DEPCA_NICSR);
 836        }
 837
 838        /* Re-initialize the DEPCA... */
 839        depca_init_ring(dev);
 840        LoadCSRs(dev);
 841
 842        depca_dbg_open(dev);
 843
 844        if (request_irq(dev->irq, &depca_interrupt, 0, lp->adapter_name, dev)) {
 845                printk("depca_open(): Requested IRQ%d is busy\n", dev->irq);
 846                status = -EAGAIN;
 847        } else {
 848
 849                /* Enable DEPCA board interrupts and turn off LED */
 850                nicsr = ((nicsr & ~IM & ~LED) | IEN);
 851                outb(nicsr, DEPCA_NICSR);
 852                outw(CSR0, DEPCA_ADDR);
 853
 854                netif_start_queue(dev);
 855
 856                status = InitRestartDepca(dev);
 857
 858                if (depca_debug > 1) {
 859                        printk("CSR0: 0x%4.4x\n", inw(DEPCA_DATA));
 860                        printk("nicsr: 0x%02x\n", inb(DEPCA_NICSR));
 861                }
 862        }
 863        return status;
 864}
 865
 866/* Initialize the lance Rx and Tx descriptor rings. */
 867static void depca_init_ring(struct net_device *dev)
 868{
 869        struct depca_private *lp = (struct depca_private *) dev->priv;
 870        u_int i;
 871        u_long offset;
 872
 873        /* Lock out other processes whilst setting up the hardware */
 874        netif_stop_queue(dev);
 875
 876        lp->rx_new = lp->tx_new = 0;
 877        lp->rx_old = lp->tx_old = 0;
 878
 879        /* Initialize the base address and length of each buffer in the ring */
 880        for (i = 0; i <= lp->rxRingMask; i++) {
 881                offset = lp->buffs_offset + i * RX_BUFF_SZ;
 882                writel((lp->device_ram_start + offset) | R_OWN, &lp->rx_ring[i].base);
 883                writew(-RX_BUFF_SZ, &lp->rx_ring[i].buf_length);
 884                lp->rx_buff[i] = lp->sh_mem + offset;
 885        }
 886
 887        for (i = 0; i <= lp->txRingMask; i++) {
 888                offset = lp->buffs_offset + (i + lp->rxRingMask + 1) * TX_BUFF_SZ;
 889                writel((lp->device_ram_start + offset) & 0x00ffffff, &lp->tx_ring[i].base);
 890                lp->tx_buff[i] = lp->sh_mem + offset;
 891        }
 892
 893        /* Set up the initialization block */
 894        lp->init_block.rx_ring = (lp->device_ram_start + lp->rx_ring_offset) | lp->rx_rlen;
 895        lp->init_block.tx_ring = (lp->device_ram_start + lp->tx_ring_offset) | lp->tx_rlen;
 896
 897        SetMulticastFilter(dev);
 898
 899        for (i = 0; i < ETH_ALEN; i++) {
 900                lp->init_block.phys_addr[i] = dev->dev_addr[i];
 901        }
 902
 903        lp->init_block.mode = 0x0000;   /* Enable the Tx and Rx */
 904}
 905
 906
 907static void depca_tx_timeout(struct net_device *dev)
 908{
 909        u_long ioaddr = dev->base_addr;
 910
 911        printk("%s: transmit timed out, status %04x, resetting.\n", dev->name, inw(DEPCA_DATA));
 912
 913        STOP_DEPCA;
 914        depca_init_ring(dev);
 915        LoadCSRs(dev);
 916        dev->trans_start = jiffies;
 917        netif_wake_queue(dev);
 918        InitRestartDepca(dev);
 919}
 920
 921
 922/*
 923** Writes a socket buffer to TX descriptor ring and starts transmission
 924*/
 925static int depca_start_xmit(struct sk_buff *skb, struct net_device *dev)
 926{
 927        struct depca_private *lp = (struct depca_private *) dev->priv;
 928        u_long ioaddr = dev->base_addr;
 929        int status = 0;
 930
 931        /* Transmitter timeout, serious problems. */
 932        if (skb->len < 1)
 933                goto out;
 934
 935        if (skb_padto(skb, ETH_ZLEN))
 936                goto out;
 937
 938        netif_stop_queue(dev);
 939
 940        if (TX_BUFFS_AVAIL) {   /* Fill in a Tx ring entry */
 941                status = load_packet(dev, skb);
 942
 943                if (!status) {
 944                        /* Trigger an immediate send demand. */
 945                        outw(CSR0, DEPCA_ADDR);
 946                        outw(INEA | TDMD, DEPCA_DATA);
 947
 948                        dev->trans_start = jiffies;
 949                        dev_kfree_skb(skb);
 950                }
 951                if (TX_BUFFS_AVAIL)
 952                        netif_start_queue(dev);
 953        } else
 954                status = -1;
 955
 956      out:
 957        return status;
 958}
 959
 960/*
 961** The DEPCA interrupt handler.
 962*/
 963static irqreturn_t depca_interrupt(int irq, void *dev_id)
 964{
 965        struct net_device *dev = dev_id;
 966        struct depca_private *lp;
 967        s16 csr0, nicsr;
 968        u_long ioaddr;
 969
 970        if (dev == NULL) {
 971                printk("depca_interrupt(): irq %d for unknown device.\n", irq);
 972                return IRQ_NONE;
 973        }
 974
 975        lp = (struct depca_private *) dev->priv;
 976        ioaddr = dev->base_addr;
 977
 978        spin_lock(&lp->lock);
 979
 980        /* mask the DEPCA board interrupts and turn on the LED */
 981        nicsr = inb(DEPCA_NICSR);
 982        nicsr |= (IM | LED);
 983        outb(nicsr, DEPCA_NICSR);
 984
 985        outw(CSR0, DEPCA_ADDR);
 986        csr0 = inw(DEPCA_DATA);
 987
 988        /* Acknowledge all of the current interrupt sources ASAP. */
 989        outw(csr0 & INTE, DEPCA_DATA);
 990
 991        if (csr0 & RINT)        /* Rx interrupt (packet arrived) */
 992                depca_rx(dev);
 993
 994        if (csr0 & TINT)        /* Tx interrupt (packet sent) */
 995                depca_tx(dev);
 996
 997        /* Any resources available? */
 998        if ((TX_BUFFS_AVAIL >= 0) && netif_queue_stopped(dev)) {
 999                netif_wake_queue(dev);
1000        }
1001
1002        /* Unmask the DEPCA board interrupts and turn off the LED */
1003        nicsr = (nicsr & ~IM & ~LED);
1004        outb(nicsr, DEPCA_NICSR);
1005
1006        spin_unlock(&lp->lock);
1007        return IRQ_HANDLED;
1008}
1009
1010/* Called with lp->lock held */
1011static int depca_rx(struct net_device *dev)
1012{
1013        struct depca_private *lp = (struct depca_private *) dev->priv;
1014        int i, entry;
1015        s32 status;
1016
1017        for (entry = lp->rx_new; !(readl(&lp->rx_ring[entry].base) & R_OWN); entry = lp->rx_new) {
1018                status = readl(&lp->rx_ring[entry].base) >> 16;
1019                if (status & R_STP) {   /* Remember start of frame */
1020                        lp->rx_old = entry;
1021                }
1022                if (status & R_ENP) {   /* Valid frame status */
1023                        if (status & R_ERR) {   /* There was an error. */
1024                                dev->stats.rx_errors++; /* Update the error stats. */
1025                                if (status & R_FRAM)
1026                                        dev->stats.rx_frame_errors++;
1027                                if (status & R_OFLO)
1028                                        dev->stats.rx_over_errors++;
1029                                if (status & R_CRC)
1030                                        dev->stats.rx_crc_errors++;
1031                                if (status & R_BUFF)
1032                                        dev->stats.rx_fifo_errors++;
1033                        } else {
1034                                short len, pkt_len = readw(&lp->rx_ring[entry].msg_length) - 4;
1035                                struct sk_buff *skb;
1036
1037                                skb = dev_alloc_skb(pkt_len + 2);
1038                                if (skb != NULL) {
1039                                        unsigned char *buf;
1040                                        skb_reserve(skb, 2);    /* 16 byte align the IP header */
1041                                        buf = skb_put(skb, pkt_len);
1042                                        if (entry < lp->rx_old) {       /* Wrapped buffer */
1043                                                len = (lp->rxRingMask - lp->rx_old + 1) * RX_BUFF_SZ;
1044                                                memcpy_fromio(buf, lp->rx_buff[lp->rx_old], len);
1045                                                memcpy_fromio(buf + len, lp->rx_buff[0], pkt_len - len);
1046                                        } else {        /* Linear buffer */
1047                                                memcpy_fromio(buf, lp->rx_buff[lp->rx_old], pkt_len);
1048                                        }
1049
1050                                        /*
1051                                           ** Notify the upper protocol layers that there is another
1052                                           ** packet to handle
1053                                         */
1054                                        skb->protocol = eth_type_trans(skb, dev);
1055                                        netif_rx(skb);
1056
1057                                        /*
1058                                           ** Update stats
1059                                         */
1060                                        dev->last_rx = jiffies;
1061                                        dev->stats.rx_packets++;
1062                                        dev->stats.rx_bytes += pkt_len;
1063                                        for (i = 1; i < DEPCA_PKT_STAT_SZ - 1; i++) {
1064                                                if (pkt_len < (i * DEPCA_PKT_BIN_SZ)) {
1065                                                        lp->pktStats.bins[i]++;
1066                                                        i = DEPCA_PKT_STAT_SZ;
1067                                                }
1068                                        }
1069                                        if (buf[0] & 0x01) {    /* Multicast/Broadcast */
1070                                                if ((*(s16 *) & buf[0] == -1) && (*(s16 *) & buf[2] == -1) && (*(s16 *) & buf[4] == -1)) {
1071                                                        lp->pktStats.broadcast++;
1072                                                } else {
1073                                                        lp->pktStats.multicast++;
1074                                                }
1075                                        } else if ((*(s16 *) & buf[0] == *(s16 *) & dev->dev_addr[0]) && (*(s16 *) & buf[2] == *(s16 *) & dev->dev_addr[2]) && (*(s16 *) & buf[4] == *(s16 *) & dev->dev_addr[4])) {
1076                                                lp->pktStats.unicast++;
1077                                        }
1078
1079                                        lp->pktStats.bins[0]++; /* Duplicates stats.rx_packets */
1080                                        if (lp->pktStats.bins[0] == 0) {        /* Reset counters */
1081                                                memset((char *) &lp->pktStats, 0, sizeof(lp->pktStats));
1082                                        }
1083                                } else {
1084                                        printk("%s: Memory squeeze, deferring packet.\n", dev->name);
1085                                        dev->stats.rx_dropped++;        /* Really, deferred. */
1086                                        break;
1087                                }
1088                        }
1089                        /* Change buffer ownership for this last frame, back to the adapter */
1090                        for (; lp->rx_old != entry; lp->rx_old = (++lp->rx_old) & lp->rxRingMask) {
1091                                writel(readl(&lp->rx_ring[lp->rx_old].base) | R_OWN, &lp->rx_ring[lp->rx_old].base);
1092                        }
1093                        writel(readl(&lp->rx_ring[entry].base) | R_OWN, &lp->rx_ring[entry].base);
1094                }
1095
1096                /*
1097                   ** Update entry information
1098                 */
1099                lp->rx_new = (++lp->rx_new) & lp->rxRingMask;
1100        }
1101
1102        return 0;
1103}
1104
1105/*
1106** Buffer sent - check for buffer errors.
1107** Called with lp->lock held
1108*/
1109static int depca_tx(struct net_device *dev)
1110{
1111        struct depca_private *lp = (struct depca_private *) dev->priv;
1112        int entry;
1113        s32 status;
1114        u_long ioaddr = dev->base_addr;
1115
1116        for (entry = lp->tx_old; entry != lp->tx_new; entry = lp->tx_old) {
1117                status = readl(&lp->tx_ring[entry].base) >> 16;
1118
1119                if (status < 0) {       /* Packet not yet sent! */
1120                        break;
1121                } else if (status & T_ERR) {    /* An error occurred. */
1122                        status = readl(&lp->tx_ring[entry].misc);
1123                        dev->stats.tx_errors++;
1124                        if (status & TMD3_RTRY)
1125                                dev->stats.tx_aborted_errors++;
1126                        if (status & TMD3_LCAR)
1127                                dev->stats.tx_carrier_errors++;
1128                        if (status & TMD3_LCOL)
1129                                dev->stats.tx_window_errors++;
1130                        if (status & TMD3_UFLO)
1131                                dev->stats.tx_fifo_errors++;
1132                        if (status & (TMD3_BUFF | TMD3_UFLO)) {
1133                                /* Trigger an immediate send demand. */
1134                                outw(CSR0, DEPCA_ADDR);
1135                                outw(INEA | TDMD, DEPCA_DATA);
1136                        }
1137                } else if (status & (T_MORE | T_ONE)) {
1138                        dev->stats.collisions++;
1139                } else {
1140                        dev->stats.tx_packets++;
1141                }
1142
1143                /* Update all the pointers */
1144                lp->tx_old = (++lp->tx_old) & lp->txRingMask;
1145        }
1146
1147        return 0;
1148}
1149
1150static int depca_close(struct net_device *dev)
1151{
1152        struct depca_private *lp = (struct depca_private *) dev->priv;
1153        s16 nicsr;
1154        u_long ioaddr = dev->base_addr;
1155
1156        netif_stop_queue(dev);
1157
1158        outw(CSR0, DEPCA_ADDR);
1159
1160        if (depca_debug > 1) {
1161                printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name, inw(DEPCA_DATA));
1162        }
1163
1164        /*
1165           ** We stop the DEPCA here -- it occasionally polls
1166           ** memory if we don't.
1167         */
1168        outw(STOP, DEPCA_DATA);
1169
1170        /*
1171           ** Give back the ROM in case the user wants to go to DOS
1172         */
1173        if (lp->adapter != DEPCA) {
1174                nicsr = inb(DEPCA_NICSR);
1175                nicsr &= ~SHE;
1176                outb(nicsr, DEPCA_NICSR);
1177        }
1178
1179        /*
1180           ** Free the associated irq
1181         */
1182        free_irq(dev->irq, dev);
1183        return 0;
1184}
1185
1186static void LoadCSRs(struct net_device *dev)
1187{
1188        struct depca_private *lp = (struct depca_private *) dev->priv;
1189        u_long ioaddr = dev->base_addr;
1190
1191        outw(CSR1, DEPCA_ADDR); /* initialisation block address LSW */
1192        outw((u16) lp->device_ram_start, DEPCA_DATA);
1193        outw(CSR2, DEPCA_ADDR); /* initialisation block address MSW */
1194        outw((u16) (lp->device_ram_start >> 16), DEPCA_DATA);
1195        outw(CSR3, DEPCA_ADDR); /* ALE control */
1196        outw(ACON, DEPCA_DATA);
1197
1198        outw(CSR0, DEPCA_ADDR); /* Point back to CSR0 */
1199
1200        return;
1201}
1202
1203static int InitRestartDepca(struct net_device *dev)
1204{
1205        struct depca_private *lp = (struct depca_private *) dev->priv;
1206        u_long ioaddr = dev->base_addr;
1207        int i, status = 0;
1208
1209        /* Copy the shadow init_block to shared memory */
1210        memcpy_toio(lp->sh_mem, &lp->init_block, sizeof(struct depca_init));
1211
1212        outw(CSR0, DEPCA_ADDR); /* point back to CSR0 */
1213        outw(INIT, DEPCA_DATA); /* initialize DEPCA */
1214
1215        /* wait for lance to complete initialisation */
1216        for (i = 0; (i < 100) && !(inw(DEPCA_DATA) & IDON); i++);
1217
1218        if (i != 100) {
1219                /* clear IDON by writing a "1", enable interrupts and start lance */
1220                outw(IDON | INEA | STRT, DEPCA_DATA);
1221                if (depca_debug > 2) {
1222                        printk("%s: DEPCA open after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1223                }
1224        } else {
1225                printk("%s: DEPCA unopen after %d ticks, init block 0x%08lx csr0 %4.4x.\n", dev->name, i, lp->mem_start, inw(DEPCA_DATA));
1226                status = -1;
1227        }
1228
1229        return status;
1230}
1231
1232/*
1233** Set or clear the multicast filter for this adaptor.
1234*/
1235static void set_multicast_list(struct net_device *dev)
1236{
1237        struct depca_private *lp = (struct depca_private *) dev->priv;
1238        u_long ioaddr = dev->base_addr;
1239
1240        netif_stop_queue(dev);
1241        while (lp->tx_old != lp->tx_new);       /* Wait for the ring to empty */
1242
1243        STOP_DEPCA;     /* Temporarily stop the depca.  */
1244        depca_init_ring(dev);   /* Initialize the descriptor rings */
1245
1246        if (dev->flags & IFF_PROMISC) { /* Set promiscuous mode */
1247                lp->init_block.mode |= PROM;
1248        } else {
1249                SetMulticastFilter(dev);
1250                lp->init_block.mode &= ~PROM;   /* Unset promiscuous mode */
1251        }
1252
1253        LoadCSRs(dev);  /* Reload CSR3 */
1254        InitRestartDepca(dev);  /* Resume normal operation. */
1255        netif_start_queue(dev); /* Unlock the TX ring */
1256}
1257
1258/*
1259** Calculate the hash code and update the logical address filter
1260** from a list of ethernet multicast addresses.
1261** Big endian crc one liner is mine, all mine, ha ha ha ha!
1262** LANCE calculates its hash codes big endian.
1263*/
1264static void SetMulticastFilter(struct net_device *dev)
1265{
1266        struct depca_private *lp = (struct depca_private *) dev->priv;
1267        struct dev_mc_list *dmi = dev->mc_list;
1268        char *addrs;
1269        int i, j, bit, byte;
1270        u16 hashcode;
1271        u32 crc;
1272
1273        if (dev->flags & IFF_ALLMULTI) {        /* Set all multicast bits */
1274                for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {
1275                        lp->init_block.mcast_table[i] = (char) 0xff;
1276                }
1277        } else {
1278                for (i = 0; i < (HASH_TABLE_LEN >> 3); i++) {   /* Clear the multicast table */
1279                        lp->init_block.mcast_table[i] = 0;
1280                }
1281                /* Add multicast addresses */
1282                for (i = 0; i < dev->mc_count; i++) {   /* for each address in the list */
1283                        addrs = dmi->dmi_addr;
1284                        dmi = dmi->next;
1285                        if ((*addrs & 0x01) == 1) {     /* multicast address? */
1286                                crc = ether_crc(ETH_ALEN, addrs);
1287                                hashcode = (crc & 1);   /* hashcode is 6 LSb of CRC ... */
1288                                for (j = 0; j < 5; j++) {       /* ... in reverse order. */
1289                                        hashcode = (hashcode << 1) | ((crc >>= 1) & 1);
1290                                }
1291
1292
1293                                byte = hashcode >> 3;   /* bit[3-5] -> byte in filter */
1294                                bit = 1 << (hashcode & 0x07);   /* bit[0-2] -> bit in byte */
1295                                lp->init_block.mcast_table[byte] |= bit;
1296                        }
1297                }
1298        }
1299
1300        return;
1301}
1302
1303static int __init depca_common_init (u_long ioaddr, struct net_device **devp)
1304{
1305        int status = 0;
1306
1307        if (!request_region (ioaddr, DEPCA_TOTAL_SIZE, depca_string)) {
1308                status = -EBUSY;
1309                goto out;
1310        }
1311
1312        if (DevicePresent(ioaddr)) {
1313                status = -ENODEV;
1314                goto out_release;
1315        }
1316
1317        if (!(*devp = alloc_etherdev (sizeof (struct depca_private)))) {
1318                status = -ENOMEM;
1319                goto out_release;
1320        }
1321
1322        return 0;
1323
1324 out_release:
1325        release_region (ioaddr, DEPCA_TOTAL_SIZE);
1326 out:
1327        return status;
1328}
1329
1330#ifdef CONFIG_MCA
1331/*
1332** Microchannel bus I/O device probe
1333*/
1334static int __init depca_mca_probe(struct device *device)
1335{
1336        unsigned char pos[2];
1337        unsigned char where;
1338        unsigned long iobase, mem_start;
1339        int irq, err;
1340        struct mca_device *mdev = to_mca_device (device);
1341        struct net_device *dev;
1342        struct depca_private *lp;
1343
1344        /*
1345        ** Search for the adapter.  If an address has been given, search
1346        ** specifically for the card at that address.  Otherwise find the
1347        ** first card in the system.
1348        */
1349
1350        pos[0] = mca_device_read_stored_pos(mdev, 2);
1351        pos[1] = mca_device_read_stored_pos(mdev, 3);
1352
1353        /*
1354        ** IO of card is handled by bits 1 and 2 of pos0.
1355        **
1356        **    bit2 bit1    IO
1357        **       0    0    0x2c00
1358        **       0    1    0x2c10
1359        **       1    0    0x2c20
1360        **       1    1    0x2c30
1361        */
1362        where = (pos[0] & 6) >> 1;
1363        iobase = 0x2c00 + (0x10 * where);
1364
1365        /*
1366        ** Found the adapter we were looking for. Now start setting it up.
1367        **
1368        ** First work on decoding the IRQ.  It's stored in the lower 4 bits
1369        ** of pos1.  Bits are as follows (from the ADF file):
1370        **
1371        **      Bits
1372        **   3   2   1   0    IRQ
1373        **   --------------------
1374        **   0   0   1   0     5
1375        **   0   0   0   1     9
1376        **   0   1   0   0    10
1377        **   1   0   0   0    11
1378        */
1379        where = pos[1] & 0x0f;
1380        switch (where) {
1381        case 1:
1382                irq = 9;
1383                break;
1384        case 2:
1385                irq = 5;
1386                break;
1387        case 4:
1388                irq = 10;
1389                break;
1390        case 8:
1391                irq = 11;
1392                break;
1393        default:
1394                printk("%s: mca_probe IRQ error.  You should never get here (%d).\n", mdev->name, where);
1395                return -EINVAL;
1396        }
1397
1398        /*
1399        ** Shared memory address of adapter is stored in bits 3-5 of pos0.
1400        ** They are mapped as follows:
1401        **
1402        **    Bit
1403        **   5  4  3       Memory Addresses
1404        **   0  0  0       C0000-CFFFF (64K)
1405        **   1  0  0       C8000-CFFFF (32K)
1406        **   0  0  1       D0000-DFFFF (64K)
1407        **   1  0  1       D8000-DFFFF (32K)
1408        **   0  1  0       E0000-EFFFF (64K)
1409        **   1  1  0       E8000-EFFFF (32K)
1410        */
1411        where = (pos[0] & 0x18) >> 3;
1412        mem_start = 0xc0000 + (where * 0x10000);
1413        if (pos[0] & 0x20) {
1414                mem_start += 0x8000;
1415        }
1416
1417        /* claim the slot */
1418        strncpy(mdev->name, depca_mca_adapter_name[mdev->index],
1419                sizeof(mdev->name));
1420        mca_device_set_claim(mdev, 1);
1421
1422        /*
1423        ** Get everything allocated and initialized...  (almost just
1424        ** like the ISA and EISA probes)
1425        */
1426        irq = mca_device_transform_irq(mdev, irq);
1427        iobase = mca_device_transform_ioport(mdev, iobase);
1428
1429        if ((err = depca_common_init (iobase, &dev)))
1430                goto out_unclaim;
1431
1432        dev->irq = irq;
1433        dev->base_addr = iobase;
1434        lp = dev->priv;
1435        lp->depca_bus = DEPCA_BUS_MCA;
1436        lp->adapter = depca_mca_adapter_type[mdev->index];
1437        lp->mem_start = mem_start;
1438
1439        if ((err = depca_hw_init(dev, device)))
1440                goto out_free;
1441
1442        return 0;
1443
1444 out_free:
1445        free_netdev (dev);
1446        release_region (iobase, DEPCA_TOTAL_SIZE);
1447 out_unclaim:
1448        mca_device_set_claim(mdev, 0);
1449
1450        return err;
1451}
1452#endif
1453
1454/*
1455** ISA bus I/O device probe
1456*/
1457
1458static void __init depca_platform_probe (void)
1459{
1460        int i;
1461        struct platform_device *pldev;
1462
1463        for (i = 0; depca_io_ports[i].iobase; i++) {
1464                depca_io_ports[i].device = NULL;
1465
1466                /* if an address has been specified on the command
1467                 * line, use it (if valid) */
1468                if (io && io != depca_io_ports[i].iobase)
1469                        continue;
1470
1471                pldev = platform_device_alloc(depca_string, i);
1472                if (!pldev)
1473                        continue;
1474
1475                pldev->dev.platform_data = (void *) depca_io_ports[i].iobase;
1476                depca_io_ports[i].device = pldev;
1477
1478                if (platform_device_add(pldev)) {
1479                        depca_io_ports[i].device = NULL;
1480                        pldev->dev.platform_data = NULL;
1481                        platform_device_put(pldev);
1482                        continue;
1483                }
1484
1485                if (!pldev->dev.driver) {
1486                /* The driver was not bound to this device, there was
1487                 * no hardware at this address. Unregister it, as the
1488                 * release fuction will take care of freeing the
1489                 * allocated structure */
1490
1491                        depca_io_ports[i].device = NULL;
1492                        pldev->dev.platform_data = NULL;
1493                        platform_device_unregister (pldev);
1494                }
1495        }
1496}
1497
1498static enum depca_type __init depca_shmem_probe (ulong *mem_start)
1499{
1500        u_long mem_base[] = DEPCA_RAM_BASE_ADDRESSES;
1501        enum depca_type adapter = unknown;
1502        int i;
1503
1504        for (i = 0; mem_base[i]; i++) {
1505                *mem_start = mem ? mem : mem_base[i];
1506                adapter = DepcaSignature (adapter_name, *mem_start);
1507                if (adapter != unknown)
1508                        break;
1509        }
1510
1511        return adapter;
1512}
1513
1514static int __init depca_isa_probe (struct platform_device *device)
1515{
1516        struct net_device *dev;
1517        struct depca_private *lp;
1518        u_long ioaddr, mem_start = 0;
1519        enum depca_type adapter = unknown;
1520        int status = 0;
1521
1522        ioaddr = (u_long) device->dev.platform_data;
1523
1524        if ((status = depca_common_init (ioaddr, &dev)))
1525                goto out;
1526
1527        adapter = depca_shmem_probe (&mem_start);
1528
1529        if (adapter == unknown) {
1530                status = -ENODEV;
1531                goto out_free;
1532        }
1533
1534        dev->base_addr = ioaddr;
1535        dev->irq = irq;         /* Use whatever value the user gave
1536                                 * us, and 0 if he didn't. */
1537        lp = dev->priv;
1538        lp->depca_bus = DEPCA_BUS_ISA;
1539        lp->adapter = adapter;
1540        lp->mem_start = mem_start;
1541
1542        if ((status = depca_hw_init(dev, &device->dev)))
1543                goto out_free;
1544
1545        return 0;
1546
1547 out_free:
1548        free_netdev (dev);
1549        release_region (ioaddr, DEPCA_TOTAL_SIZE);
1550 out:
1551        return status;
1552}
1553
1554/*
1555** EISA callbacks from sysfs.
1556*/
1557
1558#ifdef CONFIG_EISA
1559static int __init depca_eisa_probe (struct device *device)
1560{
1561        struct eisa_device *edev;
1562        struct net_device *dev;
1563        struct depca_private *lp;
1564        u_long ioaddr, mem_start;
1565        int status = 0;
1566
1567        edev = to_eisa_device (device);
1568        ioaddr = edev->base_addr + DEPCA_EISA_IO_PORTS;
1569
1570        if ((status = depca_common_init (ioaddr, &dev)))
1571                goto out;
1572
1573        /* It would have been nice to get card configuration from the
1574         * card. Unfortunately, this register is write-only (shares
1575         * it's address with the ethernet prom)... As we don't parse
1576         * the EISA configuration structures (yet... :-), just rely on
1577         * the ISA probing to sort it out... */
1578
1579        depca_shmem_probe (&mem_start);
1580
1581        dev->base_addr = ioaddr;
1582        dev->irq = irq;
1583        lp = dev->priv;
1584        lp->depca_bus = DEPCA_BUS_EISA;
1585        lp->adapter = edev->id.driver_data;
1586        lp->mem_start = mem_start;
1587
1588        if ((status = depca_hw_init(dev, device)))
1589                goto out_free;
1590
1591        return 0;
1592
1593 out_free:
1594        free_netdev (dev);
1595        release_region (ioaddr, DEPCA_TOTAL_SIZE);
1596 out:
1597        return status;
1598}
1599#endif
1600
1601static int __devexit depca_device_remove (struct device *device)
1602{
1603        struct net_device *dev;
1604        struct depca_private *lp;
1605        int bus;
1606
1607        dev  = device->driver_data;
1608        lp   = dev->priv;
1609
1610        unregister_netdev (dev);
1611        iounmap (lp->sh_mem);
1612        release_mem_region (lp->mem_start, lp->mem_len);
1613        release_region (dev->base_addr, DEPCA_TOTAL_SIZE);
1614        bus = lp->depca_bus;
1615        free_netdev (dev);
1616
1617        return 0;
1618}
1619
1620/*
1621** Look for a particular board name in the on-board Remote Diagnostics
1622** and Boot (readb) ROM. This will also give us a clue to the network RAM
1623** base address.
1624*/
1625static int __init DepcaSignature(char *name, u_long base_addr)
1626{
1627        u_int i, j, k;
1628        void __iomem *ptr;
1629        char tmpstr[16];
1630        u_long prom_addr = base_addr + 0xc000;
1631        u_long mem_addr = base_addr + 0x8000; /* 32KB */
1632
1633        /* Can't reserve the prom region, it is already marked as
1634         * used, at least on x86. Instead, reserve a memory region a
1635         * board would certainly use. If it works, go ahead. If not,
1636         * run like hell... */
1637
1638        if (!request_mem_region (mem_addr, 16, depca_string))
1639                return unknown;
1640
1641        /* Copy the first 16 bytes of ROM */
1642
1643        ptr = ioremap(prom_addr, 16);
1644        if (ptr == NULL) {
1645                printk(KERN_ERR "depca: I/O remap failed at %lx\n", prom_addr);
1646                return unknown;
1647        }
1648        for (i = 0; i < 16; i++) {
1649                tmpstr[i] = readb(ptr + i);
1650        }
1651        iounmap(ptr);
1652
1653        release_mem_region (mem_addr, 16);
1654
1655        /* Check if PROM contains a valid string */
1656        for (i = 0; *depca_signature[i] != '\0'; i++) {
1657                for (j = 0, k = 0; j < 16 && k < strlen(depca_signature[i]); j++) {
1658                        if (depca_signature[i][k] == tmpstr[j]) {       /* track signature */
1659                                k++;
1660                        } else {        /* lost signature; begin search again */
1661                                k = 0;
1662                        }
1663                }
1664                if (k == strlen(depca_signature[i]))
1665                        break;
1666        }
1667
1668        /* Check if name string is valid, provided there's no PROM */
1669        if (name && *name && (i == unknown)) {
1670                for (i = 0; *depca_signature[i] != '\0'; i++) {
1671                        if (strcmp(name, depca_signature[i]) == 0)
1672                                break;
1673                }
1674        }
1675
1676        return i;
1677}
1678
1679/*
1680** Look for a special sequence in the Ethernet station address PROM that
1681** is common across all DEPCA products. Note that the original DEPCA needs
1682** its ROM address counter to be initialized and enabled. Only enable
1683** if the first address octet is a 0x08 - this minimises the chances of
1684** messing around with some other hardware, but it assumes that this DEPCA
1685** card initialized itself correctly.
1686**
1687** Search the Ethernet address ROM for the signature. Since the ROM address
1688** counter can start at an arbitrary point, the search must include the entire
1689** probe sequence length plus the (length_of_the_signature - 1).
1690** Stop the search IMMEDIATELY after the signature is found so that the
1691** PROM address counter is correctly positioned at the start of the
1692** ethernet address for later read out.
1693*/
1694static int __init DevicePresent(u_long ioaddr)
1695{
1696        union {
1697                struct {
1698                        u32 a;
1699                        u32 b;
1700                } llsig;
1701                char Sig[sizeof(u32) << 1];
1702        }
1703        dev;
1704        short sigLength = 0;
1705        s8 data;
1706        s16 nicsr;
1707        int i, j, status = 0;
1708
1709        data = inb(DEPCA_PROM); /* clear counter on DEPCA */
1710        data = inb(DEPCA_PROM); /* read data */
1711
1712        if (data == 0x08) {     /* Enable counter on DEPCA */
1713                nicsr = inb(DEPCA_NICSR);
1714                nicsr |= AAC;
1715                outb(nicsr, DEPCA_NICSR);
1716        }
1717
1718        dev.llsig.a = ETH_PROM_SIG;
1719        dev.llsig.b = ETH_PROM_SIG;
1720        sigLength = sizeof(u32) << 1;
1721
1722        for (i = 0, j = 0; j < sigLength && i < PROBE_LENGTH + sigLength - 1; i++) {
1723                data = inb(DEPCA_PROM);
1724                if (dev.Sig[j] == data) {       /* track signature */
1725                        j++;
1726                } else {        /* lost signature; begin search again */
1727                        if (data == dev.Sig[0]) {       /* rare case.... */
1728                                j = 1;
1729                        } else {
1730                                j = 0;
1731                        }
1732                }
1733        }
1734
1735        if (j != sigLength) {
1736                status = -ENODEV;       /* search failed */
1737        }
1738
1739        return status;
1740}
1741
1742/*
1743** The DE100 and DE101 PROM accesses were made non-standard for some bizarre
1744** reason: access the upper half of the PROM with x=0; access the lower half
1745** with x=1.
1746*/
1747static int __init get_hw_addr(struct net_device *dev)
1748{
1749        u_long ioaddr = dev->base_addr;
1750        struct depca_private *lp = dev->priv;
1751        int i, k, tmp, status = 0;
1752        u_short j, x, chksum;
1753
1754        x = (((lp->adapter == de100) || (lp->adapter == de101)) ? 1 : 0);
1755
1756        for (i = 0, k = 0, j = 0; j < 3; j++) {
1757                k <<= 1;
1758                if (k > 0xffff)
1759                        k -= 0xffff;
1760
1761                k += (u_char) (tmp = inb(DEPCA_PROM + x));
1762                dev->dev_addr[i++] = (u_char) tmp;
1763                k += (u_short) ((tmp = inb(DEPCA_PROM + x)) << 8);
1764                dev->dev_addr[i++] = (u_char) tmp;
1765
1766                if (k > 0xffff)
1767                        k -= 0xffff;
1768        }
1769        if (k == 0xffff)
1770                k = 0;
1771
1772        chksum = (u_char) inb(DEPCA_PROM + x);
1773        chksum |= (u_short) (inb(DEPCA_PROM + x) << 8);
1774        if (k != chksum)
1775                status = -1;
1776
1777        return status;
1778}
1779
1780/*
1781** Load a packet into the shared memory
1782*/
1783static int load_packet(struct net_device *dev, struct sk_buff *skb)
1784{
1785        struct depca_private *lp = (struct depca_private *) dev->priv;
1786        int i, entry, end, len, status = 0;
1787
1788        entry = lp->tx_new;     /* Ring around buffer number. */
1789        end = (entry + (skb->len - 1) / TX_BUFF_SZ) & lp->txRingMask;
1790        if (!(readl(&lp->tx_ring[end].base) & T_OWN)) { /* Enough room? */
1791                /*
1792                   ** Caution: the write order is important here... don't set up the
1793                   ** ownership rights until all the other information is in place.
1794                 */
1795                if (end < entry) {      /* wrapped buffer */
1796                        len = (lp->txRingMask - entry + 1) * TX_BUFF_SZ;
1797                        memcpy_toio(lp->tx_buff[entry], skb->data, len);
1798                        memcpy_toio(lp->tx_buff[0], skb->data + len, skb->len - len);
1799                } else {        /* linear buffer */
1800                        memcpy_toio(lp->tx_buff[entry], skb->data, skb->len);
1801                }
1802
1803                /* set up the buffer descriptors */
1804                len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
1805                for (i = entry; i != end; i = (i+1) & lp->txRingMask) {
1806                        /* clean out flags */
1807                        writel(readl(&lp->tx_ring[i].base) & ~T_FLAGS, &lp->tx_ring[i].base);
1808                        writew(0x0000, &lp->tx_ring[i].misc);   /* clears other error flags */
1809                        writew(-TX_BUFF_SZ, &lp->tx_ring[i].length);    /* packet length in buffer */
1810                        len -= TX_BUFF_SZ;
1811                }
1812                /* clean out flags */
1813                writel(readl(&lp->tx_ring[end].base) & ~T_FLAGS, &lp->tx_ring[end].base);
1814                writew(0x0000, &lp->tx_ring[end].misc); /* clears other error flags */
1815                writew(-len, &lp->tx_ring[end].length); /* packet length in last buff */
1816
1817                /* start of packet */
1818                writel(readl(&lp->tx_ring[entry].base) | T_STP, &lp->tx_ring[entry].base);
1819                /* end of packet */
1820                writel(readl(&lp->tx_ring[end].base) | T_ENP, &lp->tx_ring[end].base);
1821
1822                for (i = end; i != entry; --i) {
1823                        /* ownership of packet */
1824                        writel(readl(&lp->tx_ring[i].base) | T_OWN, &lp->tx_ring[i].base);
1825                        if (i == 0)
1826                                i = lp->txRingMask + 1;
1827                }
1828                writel(readl(&lp->tx_ring[entry].base) | T_OWN, &lp->tx_ring[entry].base);
1829
1830                lp->tx_new = (++end) & lp->txRingMask;  /* update current pointers */
1831        } else {
1832                status = -1;
1833        }
1834
1835        return status;
1836}
1837
1838static void depca_dbg_open(struct net_device *dev)
1839{
1840        struct depca_private *lp = (struct depca_private *) dev->priv;
1841        u_long ioaddr = dev->base_addr;
1842        struct depca_init *p = &lp->init_block;
1843        int i;
1844        DECLARE_MAC_BUF(mac);
1845
1846        if (depca_debug > 1) {
1847                /* Do not copy the shadow init block into shared memory */
1848                /* Debugging should not affect normal operation! */
1849                /* The shadow init block will get copied across during InitRestartDepca */
1850                printk("%s: depca open with irq %d\n", dev->name, dev->irq);
1851                printk("Descriptor head addresses (CPU):\n");
1852                printk("        0x%lx  0x%lx\n", (u_long) lp->rx_ring, (u_long) lp->tx_ring);
1853                printk("Descriptor addresses (CPU):\nRX: ");
1854                for (i = 0; i < lp->rxRingMask; i++) {
1855                        if (i < 3) {
1856                                printk("%p ", &lp->rx_ring[i].base);
1857                        }
1858                }
1859                printk("...%p\n", &lp->rx_ring[i].base);
1860                printk("TX: ");
1861                for (i = 0; i < lp->txRingMask; i++) {
1862                        if (i < 3) {
1863                                printk("%p ", &lp->tx_ring[i].base);
1864                        }
1865                }
1866                printk("...%p\n", &lp->tx_ring[i].base);
1867                printk("\nDescriptor buffers (Device):\nRX: ");
1868                for (i = 0; i < lp->rxRingMask; i++) {
1869                        if (i < 3) {
1870                                printk("0x%8.8x  ", readl(&lp->rx_ring[i].base));
1871                        }
1872                }
1873                printk("...0x%8.8x\n", readl(&lp->rx_ring[i].base));
1874                printk("TX: ");
1875                for (i = 0; i < lp->txRingMask; i++) {
1876                        if (i < 3) {
1877                                printk("0x%8.8x  ", readl(&lp->tx_ring[i].base));
1878                        }
1879                }
1880                printk("...0x%8.8x\n", readl(&lp->tx_ring[i].base));
1881                printk("Initialisation block at 0x%8.8lx(Phys)\n", lp->mem_start);
1882                printk("        mode: 0x%4.4x\n", p->mode);
1883                printk("        physical address: %s\n", print_mac(mac, p->phys_addr));
1884                printk("        multicast hash table: ");
1885                for (i = 0; i < (HASH_TABLE_LEN >> 3) - 1; i++) {
1886                        printk("%2.2x:", p->mcast_table[i]);
1887                }
1888                printk("%2.2x\n", p->mcast_table[i]);
1889                printk("        rx_ring at: 0x%8.8x\n", p->rx_ring);
1890                printk("        tx_ring at: 0x%8.8x\n", p->tx_ring);
1891                printk("buffers (Phys): 0x%8.8lx\n", lp->mem_start + lp->buffs_offset);
1892                printk("Ring size:\nRX: %d  Log2(rxRingMask): 0x%8.8x\n", (int) lp->rxRingMask + 1, lp->rx_rlen);
1893                printk("TX: %d  Log2(txRingMask): 0x%8.8x\n", (int) lp->txRingMask + 1, lp->tx_rlen);
1894                outw(CSR2, DEPCA_ADDR);
1895                printk("CSR2&1: 0x%4.4x", inw(DEPCA_DATA));
1896                outw(CSR1, DEPCA_ADDR);
1897                printk("%4.4x\n", inw(DEPCA_DATA));
1898                outw(CSR3, DEPCA_ADDR);
1899                printk("CSR3: 0x%4.4x\n", inw(DEPCA_DATA));
1900        }
1901
1902        return;
1903}
1904
1905/*
1906** Perform IOCTL call functions here. Some are privileged operations and the
1907** effective uid is checked in those cases.
1908** All multicast IOCTLs will not work here and are for testing purposes only.
1909*/
1910static int depca_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1911{
1912        struct depca_private *lp = (struct depca_private *) dev->priv;
1913        struct depca_ioctl *ioc = (struct depca_ioctl *) &rq->ifr_ifru;
1914        int i, status = 0;
1915        u_long ioaddr = dev->base_addr;
1916        union {
1917                u8 addr[(HASH_TABLE_LEN * ETH_ALEN)];
1918                u16 sval[(HASH_TABLE_LEN * ETH_ALEN) >> 1];
1919                u32 lval[(HASH_TABLE_LEN * ETH_ALEN) >> 2];
1920        } tmp;
1921        unsigned long flags;
1922        void *buf;
1923
1924        switch (ioc->cmd) {
1925        case DEPCA_GET_HWADDR:  /* Get the hardware address */
1926                for (i = 0; i < ETH_ALEN; i++) {
1927                        tmp.addr[i] = dev->dev_addr[i];
1928                }
1929                ioc->len = ETH_ALEN;
1930                if (copy_to_user(ioc->data, tmp.addr, ioc->len))
1931                        return -EFAULT;
1932                break;
1933
1934        case DEPCA_SET_HWADDR:  /* Set the hardware address */
1935                if (!capable(CAP_NET_ADMIN))
1936                        return -EPERM;
1937                if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN))
1938                        return -EFAULT;
1939                for (i = 0; i < ETH_ALEN; i++) {
1940                        dev->dev_addr[i] = tmp.addr[i];
1941                }
1942                netif_stop_queue(dev);
1943                while (lp->tx_old != lp->tx_new)
1944                        cpu_relax();    /* Wait for the ring to empty */
1945
1946                STOP_DEPCA;     /* Temporarily stop the depca.  */
1947                depca_init_ring(dev);   /* Initialize the descriptor rings */
1948                LoadCSRs(dev);  /* Reload CSR3 */
1949                InitRestartDepca(dev);  /* Resume normal operation. */
1950                netif_start_queue(dev); /* Unlock the TX ring */
1951                break;
1952
1953        case DEPCA_SET_PROM:    /* Set Promiscuous Mode */
1954                if (!capable(CAP_NET_ADMIN))
1955                        return -EPERM;
1956                netif_stop_queue(dev);
1957                while (lp->tx_old != lp->tx_new)
1958                        cpu_relax();    /* Wait for the ring to empty */
1959
1960                STOP_DEPCA;     /* Temporarily stop the depca.  */
1961                depca_init_ring(dev);   /* Initialize the descriptor rings */
1962                lp->init_block.mode |= PROM;    /* Set promiscuous mode */
1963
1964                LoadCSRs(dev);  /* Reload CSR3 */
1965                InitRestartDepca(dev);  /* Resume normal operation. */
1966                netif_start_queue(dev); /* Unlock the TX ring */
1967                break;
1968
1969        case DEPCA_CLR_PROM:    /* Clear Promiscuous Mode */
1970                if (!capable(CAP_NET_ADMIN))
1971                        return -EPERM;
1972                netif_stop_queue(dev);
1973                while (lp->tx_old != lp->tx_new)
1974                        cpu_relax();    /* Wait for the ring to empty */
1975
1976                STOP_DEPCA;     /* Temporarily stop the depca.  */
1977                depca_init_ring(dev);   /* Initialize the descriptor rings */
1978                lp->init_block.mode &= ~PROM;   /* Clear promiscuous mode */
1979
1980                LoadCSRs(dev);  /* Reload CSR3 */
1981                InitRestartDepca(dev);  /* Resume normal operation. */
1982                netif_start_queue(dev); /* Unlock the TX ring */
1983                break;
1984
1985        case DEPCA_SAY_BOO:     /* Say "Boo!" to the kernel log file */
1986                if(!capable(CAP_NET_ADMIN))
1987                        return -EPERM;
1988                printk("%s: Boo!\n", dev->name);
1989                break;
1990
1991        case DEPCA_GET_MCA:     /* Get the multicast address table */
1992                ioc->len = (HASH_TABLE_LEN >> 3);
1993                if (copy_to_user(ioc->data, lp->init_block.mcast_table, ioc->len))
1994                        return -EFAULT;
1995                break;
1996
1997        case DEPCA_SET_MCA:     /* Set a multicast address */
1998                if (!capable(CAP_NET_ADMIN))
1999                        return -EPERM;
2000                if (ioc->len >= HASH_TABLE_LEN)
2001                        return -EINVAL;
2002                if (copy_from_user(tmp.addr, ioc->data, ETH_ALEN * ioc->len))
2003                        return -EFAULT;
2004                set_multicast_list(dev);
2005                break;
2006
2007        case DEPCA_CLR_MCA:     /* Clear all multicast addresses */
2008                if (!capable(CAP_NET_ADMIN))
2009                        return -EPERM;
2010                set_multicast_list(dev);
2011                break;
2012
2013        case DEPCA_MCA_EN:      /* Enable pass all multicast addressing */
2014                if (!capable(CAP_NET_ADMIN))
2015                        return -EPERM;
2016                set_multicast_list(dev);
2017                break;
2018
2019        case DEPCA_GET_STATS:   /* Get the driver statistics */
2020                ioc->len = sizeof(lp->pktStats);
2021                buf = kmalloc(ioc->len, GFP_KERNEL);
2022                if(!buf)
2023                        return -ENOMEM;
2024                spin_lock_irqsave(&lp->lock, flags);
2025                memcpy(buf, &lp->pktStats, ioc->len);
2026                spin_unlock_irqrestore(&lp->lock, flags);
2027                if (copy_to_user(ioc->data, buf, ioc->len))
2028                        status = -EFAULT;
2029                kfree(buf);
2030                break;
2031
2032        case DEPCA_CLR_STATS:   /* Zero out the driver statistics */
2033                if (!capable(CAP_NET_ADMIN))
2034                        return -EPERM;
2035                spin_lock_irqsave(&lp->lock, flags);
2036                memset(&lp->pktStats, 0, sizeof(lp->pktStats));
2037                spin_unlock_irqrestore(&lp->lock, flags);
2038                break;
2039
2040        case DEPCA_GET_REG:     /* Get the DEPCA Registers */
2041                i = 0;
2042                tmp.sval[i++] = inw(DEPCA_NICSR);
2043                outw(CSR0, DEPCA_ADDR); /* status register */
2044                tmp.sval[i++] = inw(DEPCA_DATA);
2045                memcpy(&tmp.sval[i], &lp->init_block, sizeof(struct depca_init));
2046                ioc->len = i + sizeof(struct depca_init);
2047                if (copy_to_user(ioc->data, tmp.addr, ioc->len))
2048                        return -EFAULT;
2049                break;
2050
2051        default:
2052                return -EOPNOTSUPP;
2053        }
2054
2055        return status;
2056}
2057
2058static int __init depca_module_init (void)
2059{
2060        int err = 0;
2061
2062#ifdef CONFIG_MCA
2063        err = mca_register_driver (&depca_mca_driver);
2064#endif
2065#ifdef CONFIG_EISA
2066        err |= eisa_driver_register (&depca_eisa_driver);
2067#endif
2068        err |= platform_driver_register (&depca_isa_driver);
2069        depca_platform_probe ();
2070
2071        return err;
2072}
2073
2074static void __exit depca_module_exit (void)
2075{
2076        int i;
2077#ifdef CONFIG_MCA
2078        mca_unregister_driver (&depca_mca_driver);
2079#endif
2080#ifdef CONFIG_EISA
2081        eisa_driver_unregister (&depca_eisa_driver);
2082#endif
2083        platform_driver_unregister (&depca_isa_driver);
2084
2085        for (i = 0; depca_io_ports[i].iobase; i++) {
2086                if (depca_io_ports[i].device) {
2087                        depca_io_ports[i].device->dev.platform_data = NULL;
2088                        platform_device_unregister (depca_io_ports[i].device);
2089                        depca_io_ports[i].device = NULL;
2090                }
2091        }
2092}
2093
2094module_init (depca_module_init);
2095module_exit (depca_module_exit);
2096
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