git.oblomov.eu Git - linux-2.6/blob - drivers/net/pcnet32.c

   1 /* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */
   2 /*
   3  *      Copyright 1996-1999 Thomas Bogendoerfer
   4  *
   5  *      Derived from the lance driver written 1993,1994,1995 by Donald Becker.
   6  *
   7  *      Copyright 1993 United States Government as represented by the
   8  *      Director, National Security Agency.
   9  *
  10  *      This software may be used and distributed according to the terms
  11  *      of the GNU General Public License, incorporated herein by reference.
  12  *
  13  *      This driver is for PCnet32 and PCnetPCI based ethercards
  14  */
  15 /**************************************************************************
  16  *  23 Oct, 2000.
  17  *  Fixed a few bugs, related to running the controller in 32bit mode.
  18  *
  19  *  Carsten Langgaard, carstenl@mips.com
  20  *  Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
  21  *
  22  *************************************************************************/
  23
  24 #define DRV_NAME        "pcnet32"
  25 #ifdef CONFIG_PCNET32_NAPI
  26 #define DRV_VERSION     "1.34-NAPI"
  27 #else
  28 #define DRV_VERSION     "1.34"
  29 #endif
  30 #define DRV_RELDATE     "14.Aug.2007"
  31 #define PFX             DRV_NAME ": "
  32
  33 static const char *const version =
  34     DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " tsbogend@alpha.franken.de\n";
  35
  36 #include <linux/module.h>
  37 #include <linux/kernel.h>
  38 #include <linux/string.h>
  39 #include <linux/errno.h>
  40 #include <linux/ioport.h>
  41 #include <linux/slab.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/pci.h>
  44 #include <linux/delay.h>
  45 #include <linux/init.h>
  46 #include <linux/ethtool.h>
  47 #include <linux/mii.h>
  48 #include <linux/crc32.h>
  49 #include <linux/netdevice.h>
  50 #include <linux/etherdevice.h>
  51 #include <linux/skbuff.h>
  52 #include <linux/spinlock.h>
  53 #include <linux/moduleparam.h>
  54 #include <linux/bitops.h>
  55
  56 #include <asm/dma.h>
  57 #include <asm/io.h>
  58 #include <asm/uaccess.h>
  59 #include <asm/irq.h>
  60
  61 /*
  62  * PCI device identifiers for "new style" Linux PCI Device Drivers
  63  */
  64 static struct pci_device_id pcnet32_pci_tbl[] = {
  65         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE_HOME), },
  66         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE), },
  67
  68         /*
  69          * Adapters that were sold with IBM's RS/6000 or pSeries hardware have
  70          * the incorrect vendor id.
  71          */
  72         { PCI_DEVICE(PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_AMD_LANCE),
  73           .class = (PCI_CLASS_NETWORK_ETHERNET << 8), .class_mask = 0xffff00, },
  74
  75         { }     /* terminate list */
  76 };
  77
  78 MODULE_DEVICE_TABLE(pci, pcnet32_pci_tbl);
  79
  80 static int cards_found;
  81
  82 /*
  83  * VLB I/O addresses
  84  */
  85 static unsigned int pcnet32_portlist[] __initdata =
  86     { 0x300, 0x320, 0x340, 0x360, 0 };
  87
  88 static int pcnet32_debug = 0;
  89 static int tx_start = 1;        /* Mapping -- 0:20, 1:64, 2:128, 3:~220 (depends on chip vers) */
  90 static int pcnet32vlb;          /* check for VLB cards ? */
  91
  92 static struct net_device *pcnet32_dev;
  93
  94 static int max_interrupt_work = 2;
  95 static int rx_copybreak = 200;
  96
  97 #define PCNET32_PORT_AUI      0x00
  98 #define PCNET32_PORT_10BT     0x01
  99 #define PCNET32_PORT_GPSI     0x02
 100 #define PCNET32_PORT_MII      0x03
 101
 102 #define PCNET32_PORT_PORTSEL  0x03
 103 #define PCNET32_PORT_ASEL     0x04
 104 #define PCNET32_PORT_100      0x40
 105 #define PCNET32_PORT_FD       0x80
 106
 107 #define PCNET32_DMA_MASK 0xffffffff
 108
 109 #define PCNET32_WATCHDOG_TIMEOUT (jiffies + (2 * HZ))
 110 #define PCNET32_BLINK_TIMEOUT   (jiffies + (HZ/4))
 111
 112 /*
 113  * table to translate option values from tulip
 114  * to internal options
 115  */
 116 static const unsigned char options_mapping[] = {
 117         PCNET32_PORT_ASEL,                      /*  0 Auto-select      */
 118         PCNET32_PORT_AUI,                       /*  1 BNC/AUI          */
 119         PCNET32_PORT_AUI,                       /*  2 AUI/BNC          */
 120         PCNET32_PORT_ASEL,                      /*  3 not supported    */
 121         PCNET32_PORT_10BT | PCNET32_PORT_FD,    /*  4 10baseT-FD       */
 122         PCNET32_PORT_ASEL,                      /*  5 not supported    */
 123         PCNET32_PORT_ASEL,                      /*  6 not supported    */
 124         PCNET32_PORT_ASEL,                      /*  7 not supported    */
 125         PCNET32_PORT_ASEL,                      /*  8 not supported    */
 126         PCNET32_PORT_MII,                       /*  9 MII 10baseT      */
 127         PCNET32_PORT_MII | PCNET32_PORT_FD,     /* 10 MII 10baseT-FD   */
 128         PCNET32_PORT_MII,                       /* 11 MII (autosel)    */
 129         PCNET32_PORT_10BT,                      /* 12 10BaseT          */
 130         PCNET32_PORT_MII | PCNET32_PORT_100,    /* 13 MII 100BaseTx    */
 131                                                 /* 14 MII 100BaseTx-FD */
 132         PCNET32_PORT_MII | PCNET32_PORT_100 | PCNET32_PORT_FD,
 133         PCNET32_PORT_ASEL                       /* 15 not supported    */
 134 };
 135
 136 static const char pcnet32_gstrings_test[][ETH_GSTRING_LEN] = {
 137         "Loopback test  (offline)"
 138 };
 139
 140 #define PCNET32_TEST_LEN (sizeof(pcnet32_gstrings_test) / ETH_GSTRING_LEN)
 141
 142 #define PCNET32_NUM_REGS 136
 143
 144 #define MAX_UNITS 8             /* More are supported, limit only on options */
 145 static int options[MAX_UNITS];
 146 static int full_duplex[MAX_UNITS];
 147 static int homepna[MAX_UNITS];
 148
 149 /*
 150  *                              Theory of Operation
 151  *
 152  * This driver uses the same software structure as the normal lance
 153  * driver. So look for a verbose description in lance.c. The differences
 154  * to the normal lance driver is the use of the 32bit mode of PCnet32
 155  * and PCnetPCI chips. Because these chips are 32bit chips, there is no
 156  * 16MB limitation and we don't need bounce buffers.
 157  */
 158
 159 /*
 160  * Set the number of Tx and Rx buffers, using Log_2(# buffers).
 161  * Reasonable default values are 4 Tx buffers, and 16 Rx buffers.
 162  * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4).
 163  */
 164 #ifndef PCNET32_LOG_TX_BUFFERS
 165 #define PCNET32_LOG_TX_BUFFERS          4
 166 #define PCNET32_LOG_RX_BUFFERS          5
 167 #define PCNET32_LOG_MAX_TX_BUFFERS      9       /* 2^9 == 512 */
 168 #define PCNET32_LOG_MAX_RX_BUFFERS      9
 169 #endif
 170
 171 #define TX_RING_SIZE            (1 << (PCNET32_LOG_TX_BUFFERS))
 172 #define TX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_TX_BUFFERS))
 173
 174 #define RX_RING_SIZE            (1 << (PCNET32_LOG_RX_BUFFERS))
 175 #define RX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_RX_BUFFERS))
 176
 177 #define PKT_BUF_SZ              1544
 178
 179 /* Offsets from base I/O address. */
 180 #define PCNET32_WIO_RDP         0x10
 181 #define PCNET32_WIO_RAP         0x12
 182 #define PCNET32_WIO_RESET       0x14
 183 #define PCNET32_WIO_BDP         0x16
 184
 185 #define PCNET32_DWIO_RDP        0x10
 186 #define PCNET32_DWIO_RAP        0x14
 187 #define PCNET32_DWIO_RESET      0x18
 188 #define PCNET32_DWIO_BDP        0x1C
 189
 190 #define PCNET32_TOTAL_SIZE      0x20
 191
 192 #define CSR0            0
 193 #define CSR0_INIT       0x1
 194 #define CSR0_START      0x2
 195 #define CSR0_STOP       0x4
 196 #define CSR0_TXPOLL     0x8
 197 #define CSR0_INTEN      0x40
 198 #define CSR0_IDON       0x0100
 199 #define CSR0_NORMAL     (CSR0_START | CSR0_INTEN)
 200 #define PCNET32_INIT_LOW        1
 201 #define PCNET32_INIT_HIGH       2
 202 #define CSR3            3
 203 #define CSR4            4
 204 #define CSR5            5
 205 #define CSR5_SUSPEND    0x0001
 206 #define CSR15           15
 207 #define PCNET32_MC_FILTER       8
 208
 209 #define PCNET32_79C970A 0x2621
 210
 211 /* The PCNET32 Rx and Tx ring descriptors. */
 212 struct pcnet32_rx_head {
 213         __le32  base;
 214         __le16  buf_length;     /* two`s complement of length */
 215         __le16  status;
 216         __le32  msg_length;
 217         __le32  reserved;
 218 };
 219
 220 struct pcnet32_tx_head {
 221         __le32  base;
 222         __le16  length;         /* two`s complement of length */
 223         __le16  status;
 224         __le32  misc;
 225         __le32  reserved;
 226 };
 227
 228 /* The PCNET32 32-Bit initialization block, described in databook. */
 229 struct pcnet32_init_block {
 230         __le16  mode;
 231         __le16  tlen_rlen;
 232         u8      phys_addr[6];
 233         __le16  reserved;
 234         __le32  filter[2];
 235         /* Receive and transmit ring base, along with extra bits. */
 236         __le32  rx_ring;
 237         __le32  tx_ring;
 238 };
 239
 240 /* PCnet32 access functions */
 241 struct pcnet32_access {
 242         u16     (*read_csr) (unsigned long, int);
 243         void    (*write_csr) (unsigned long, int, u16);
 244         u16     (*read_bcr) (unsigned long, int);
 245         void    (*write_bcr) (unsigned long, int, u16);
 246         u16     (*read_rap) (unsigned long);
 247         void    (*write_rap) (unsigned long, u16);
 248         void    (*reset) (unsigned long);
 249 };
 250
 251 /*
 252  * The first field of pcnet32_private is read by the ethernet device
 253  * so the structure should be allocated using pci_alloc_consistent().
 254  */
 255 struct pcnet32_private {
 256         struct pcnet32_init_block *init_block;
 257         /* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */
 258         struct pcnet32_rx_head  *rx_ring;
 259         struct pcnet32_tx_head  *tx_ring;
 260         dma_addr_t              init_dma_addr;/* DMA address of beginning of the init block,
 261                                    returned by pci_alloc_consistent */
 262         struct pci_dev          *pci_dev;
 263         const char              *name;
 264         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
 265         struct sk_buff          **tx_skbuff;
 266         struct sk_buff          **rx_skbuff;
 267         dma_addr_t              *tx_dma_addr;
 268         dma_addr_t              *rx_dma_addr;
 269         struct pcnet32_access   a;
 270         spinlock_t              lock;           /* Guard lock */
 271         unsigned int            cur_rx, cur_tx; /* The next free ring entry */
 272         unsigned int            rx_ring_size;   /* current rx ring size */
 273         unsigned int            tx_ring_size;   /* current tx ring size */
 274         unsigned int            rx_mod_mask;    /* rx ring modular mask */
 275         unsigned int            tx_mod_mask;    /* tx ring modular mask */
 276         unsigned short          rx_len_bits;
 277         unsigned short          tx_len_bits;
 278         dma_addr_t              rx_ring_dma_addr;
 279         dma_addr_t              tx_ring_dma_addr;
 280         unsigned int            dirty_rx,       /* ring entries to be freed. */
 281                                 dirty_tx;
 282
 283         struct net_device       *dev;
 284         struct napi_struct      napi;
 285         struct net_device_stats stats;
 286         char                    tx_full;
 287         char                    phycount;       /* number of phys found */
 288         int                     options;
 289         unsigned int            shared_irq:1,   /* shared irq possible */
 290                                 dxsuflo:1,   /* disable transmit stop on uflo */
 291                                 mii:1;          /* mii port available */
 292         struct net_device       *next;
 293         struct mii_if_info      mii_if;
 294         struct timer_list       watchdog_timer;
 295         struct timer_list       blink_timer;
 296         u32                     msg_enable;     /* debug message level */
 297
 298         /* each bit indicates an available PHY */
 299         u32                     phymask;
 300         unsigned short          chip_version;   /* which variant this is */
 301 };
 302
 303 static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
 304 static int pcnet32_probe1(unsigned long, int, struct pci_dev *);
 305 static int pcnet32_open(struct net_device *);
 306 static int pcnet32_init_ring(struct net_device *);
 307 static int pcnet32_start_xmit(struct sk_buff *, struct net_device *);
 308 static void pcnet32_tx_timeout(struct net_device *dev);
 309 static irqreturn_t pcnet32_interrupt(int, void *);
 310 static int pcnet32_close(struct net_device *);
 311 static struct net_device_stats *pcnet32_get_stats(struct net_device *);
 312 static void pcnet32_load_multicast(struct net_device *dev);
 313 static void pcnet32_set_multicast_list(struct net_device *);
 314 static int pcnet32_ioctl(struct net_device *, struct ifreq *, int);
 315 static void pcnet32_watchdog(struct net_device *);
 316 static int mdio_read(struct net_device *dev, int phy_id, int reg_num);
 317 static void mdio_write(struct net_device *dev, int phy_id, int reg_num,
 318                        int val);
 319 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits);
 320 static void pcnet32_ethtool_test(struct net_device *dev,
 321                                  struct ethtool_test *eth_test, u64 * data);
 322 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1);
 323 static int pcnet32_phys_id(struct net_device *dev, u32 data);
 324 static void pcnet32_led_blink_callback(struct net_device *dev);
 325 static int pcnet32_get_regs_len(struct net_device *dev);
 326 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 327                              void *ptr);
 328 static void pcnet32_purge_tx_ring(struct net_device *dev);
 329 static int pcnet32_alloc_ring(struct net_device *dev, char *name);
 330 static void pcnet32_free_ring(struct net_device *dev);
 331 static void pcnet32_check_media(struct net_device *dev, int verbose);
 332
 333 static u16 pcnet32_wio_read_csr(unsigned long addr, int index)
 334 {
 335         outw(index, addr + PCNET32_WIO_RAP);
 336         return inw(addr + PCNET32_WIO_RDP);
 337 }
 338
 339 static void pcnet32_wio_write_csr(unsigned long addr, int index, u16 val)
 340 {
 341         outw(index, addr + PCNET32_WIO_RAP);
 342         outw(val, addr + PCNET32_WIO_RDP);
 343 }
 344
 345 static u16 pcnet32_wio_read_bcr(unsigned long addr, int index)
 346 {
 347         outw(index, addr + PCNET32_WIO_RAP);
 348         return inw(addr + PCNET32_WIO_BDP);
 349 }
 350
 351 static void pcnet32_wio_write_bcr(unsigned long addr, int index, u16 val)
 352 {
 353         outw(index, addr + PCNET32_WIO_RAP);
 354         outw(val, addr + PCNET32_WIO_BDP);
 355 }
 356
 357 static u16 pcnet32_wio_read_rap(unsigned long addr)
 358 {
 359         return inw(addr + PCNET32_WIO_RAP);
 360 }
 361
 362 static void pcnet32_wio_write_rap(unsigned long addr, u16 val)
 363 {
 364         outw(val, addr + PCNET32_WIO_RAP);
 365 }
 366
 367 static void pcnet32_wio_reset(unsigned long addr)
 368 {
 369         inw(addr + PCNET32_WIO_RESET);
 370 }
 371
 372 static int pcnet32_wio_check(unsigned long addr)
 373 {
 374         outw(88, addr + PCNET32_WIO_RAP);
 375         return (inw(addr + PCNET32_WIO_RAP) == 88);
 376 }
 377
 378 static struct pcnet32_access pcnet32_wio = {
 379         .read_csr = pcnet32_wio_read_csr,
 380         .write_csr = pcnet32_wio_write_csr,
 381         .read_bcr = pcnet32_wio_read_bcr,
 382         .write_bcr = pcnet32_wio_write_bcr,
 383         .read_rap = pcnet32_wio_read_rap,
 384         .write_rap = pcnet32_wio_write_rap,
 385         .reset = pcnet32_wio_reset
 386 };
 387
 388 static u16 pcnet32_dwio_read_csr(unsigned long addr, int index)
 389 {
 390         outl(index, addr + PCNET32_DWIO_RAP);
 391         return (inl(addr + PCNET32_DWIO_RDP) & 0xffff);
 392 }
 393
 394 static void pcnet32_dwio_write_csr(unsigned long addr, int index, u16 val)
 395 {
 396         outl(index, addr + PCNET32_DWIO_RAP);
 397         outl(val, addr + PCNET32_DWIO_RDP);
 398 }
 399
 400 static u16 pcnet32_dwio_read_bcr(unsigned long addr, int index)
 401 {
 402         outl(index, addr + PCNET32_DWIO_RAP);
 403         return (inl(addr + PCNET32_DWIO_BDP) & 0xffff);
 404 }
 405
 406 static void pcnet32_dwio_write_bcr(unsigned long addr, int index, u16 val)
 407 {
 408         outl(index, addr + PCNET32_DWIO_RAP);
 409         outl(val, addr + PCNET32_DWIO_BDP);
 410 }
 411
 412 static u16 pcnet32_dwio_read_rap(unsigned long addr)
 413 {
 414         return (inl(addr + PCNET32_DWIO_RAP) & 0xffff);
 415 }
 416
 417 static void pcnet32_dwio_write_rap(unsigned long addr, u16 val)
 418 {
 419         outl(val, addr + PCNET32_DWIO_RAP);
 420 }
 421
 422 static void pcnet32_dwio_reset(unsigned long addr)
 423 {
 424         inl(addr + PCNET32_DWIO_RESET);
 425 }
 426
 427 static int pcnet32_dwio_check(unsigned long addr)
 428 {
 429         outl(88, addr + PCNET32_DWIO_RAP);
 430         return ((inl(addr + PCNET32_DWIO_RAP) & 0xffff) == 88);
 431 }
 432
 433 static struct pcnet32_access pcnet32_dwio = {
 434         .read_csr = pcnet32_dwio_read_csr,
 435         .write_csr = pcnet32_dwio_write_csr,
 436         .read_bcr = pcnet32_dwio_read_bcr,
 437         .write_bcr = pcnet32_dwio_write_bcr,
 438         .read_rap = pcnet32_dwio_read_rap,
 439         .write_rap = pcnet32_dwio_write_rap,
 440         .reset = pcnet32_dwio_reset
 441 };
 442
 443 static void pcnet32_netif_stop(struct net_device *dev)
 444 {
 445         struct pcnet32_private *lp = netdev_priv(dev);
 446         dev->trans_start = jiffies;
 447 #ifdef CONFIG_PCNET32_NAPI
 448         napi_disable(&lp->napi);
 449 #endif
 450         netif_tx_disable(dev);
 451 }
 452
 453 static void pcnet32_netif_start(struct net_device *dev)
 454 {
 455         struct pcnet32_private *lp = netdev_priv(dev);
 456         netif_wake_queue(dev);
 457 #ifdef CONFIG_PCNET32_NAPI
 458         napi_enable(&lp->napi);
 459 #endif
 460 }
 461
 462 /*
 463  * Allocate space for the new sized tx ring.
 464  * Free old resources
 465  * Save new resources.
 466  * Any failure keeps old resources.
 467  * Must be called with lp->lock held.
 468  */
 469 static void pcnet32_realloc_tx_ring(struct net_device *dev,
 470                                     struct pcnet32_private *lp,
 471                                     unsigned int size)
 472 {
 473         dma_addr_t new_ring_dma_addr;
 474         dma_addr_t *new_dma_addr_list;
 475         struct pcnet32_tx_head *new_tx_ring;
 476         struct sk_buff **new_skb_list;
 477
 478         pcnet32_purge_tx_ring(dev);
 479
 480         new_tx_ring = pci_alloc_consistent(lp->pci_dev,
 481                                            sizeof(struct pcnet32_tx_head) *
 482                                            (1 << size),
 483                                            &new_ring_dma_addr);
 484         if (new_tx_ring == NULL) {
 485                 if (netif_msg_drv(lp))
 486                         printk("\n" KERN_ERR
 487                                "%s: Consistent memory allocation failed.\n",
 488                                dev->name);
 489                 return;
 490         }
 491         memset(new_tx_ring, 0, sizeof(struct pcnet32_tx_head) * (1 << size));
 492
 493         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
 494                                 GFP_ATOMIC);
 495         if (!new_dma_addr_list) {
 496                 if (netif_msg_drv(lp))
 497                         printk("\n" KERN_ERR
 498                                "%s: Memory allocation failed.\n", dev->name);
 499                 goto free_new_tx_ring;
 500         }
 501
 502         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
 503                                 GFP_ATOMIC);
 504         if (!new_skb_list) {
 505                 if (netif_msg_drv(lp))
 506                         printk("\n" KERN_ERR
 507                                "%s: Memory allocation failed.\n", dev->name);
 508                 goto free_new_lists;
 509         }
 510
 511         kfree(lp->tx_skbuff);
 512         kfree(lp->tx_dma_addr);
 513         pci_free_consistent(lp->pci_dev,
 514                             sizeof(struct pcnet32_tx_head) *
 515                             lp->tx_ring_size, lp->tx_ring,
 516                             lp->tx_ring_dma_addr);
 517
 518         lp->tx_ring_size = (1 << size);
 519         lp->tx_mod_mask = lp->tx_ring_size - 1;
 520         lp->tx_len_bits = (size << 12);
 521         lp->tx_ring = new_tx_ring;
 522         lp->tx_ring_dma_addr = new_ring_dma_addr;
 523         lp->tx_dma_addr = new_dma_addr_list;
 524         lp->tx_skbuff = new_skb_list;
 525         return;
 526
 527     free_new_lists:
 528         kfree(new_dma_addr_list);
 529     free_new_tx_ring:
 530         pci_free_consistent(lp->pci_dev,
 531                             sizeof(struct pcnet32_tx_head) *
 532                             (1 << size),
 533                             new_tx_ring,
 534                             new_ring_dma_addr);
 535         return;
 536 }
 537
 538 /*
 539  * Allocate space for the new sized rx ring.
 540  * Re-use old receive buffers.
 541  *   alloc extra buffers
 542  *   free unneeded buffers
 543  *   free unneeded buffers
 544  * Save new resources.
 545  * Any failure keeps old resources.
 546  * Must be called with lp->lock held.
 547  */
 548 static void pcnet32_realloc_rx_ring(struct net_device *dev,
 549                                     struct pcnet32_private *lp,
 550                                     unsigned int size)
 551 {
 552         dma_addr_t new_ring_dma_addr;
 553         dma_addr_t *new_dma_addr_list;
 554         struct pcnet32_rx_head *new_rx_ring;
 555         struct sk_buff **new_skb_list;
 556         int new, overlap;
 557
 558         new_rx_ring = pci_alloc_consistent(lp->pci_dev,
 559                                            sizeof(struct pcnet32_rx_head) *
 560                                            (1 << size),
 561                                            &new_ring_dma_addr);
 562         if (new_rx_ring == NULL) {
 563                 if (netif_msg_drv(lp))
 564                         printk("\n" KERN_ERR
 565                                "%s: Consistent memory allocation failed.\n",
 566                                dev->name);
 567                 return;
 568         }
 569         memset(new_rx_ring, 0, sizeof(struct pcnet32_rx_head) * (1 << size));
 570
 571         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
 572                                 GFP_ATOMIC);
 573         if (!new_dma_addr_list) {
 574                 if (netif_msg_drv(lp))
 575                         printk("\n" KERN_ERR
 576                                "%s: Memory allocation failed.\n", dev->name);
 577                 goto free_new_rx_ring;
 578         }
 579
 580         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
 581                                 GFP_ATOMIC);
 582         if (!new_skb_list) {
 583                 if (netif_msg_drv(lp))
 584                         printk("\n" KERN_ERR
 585                                "%s: Memory allocation failed.\n", dev->name);
 586                 goto free_new_lists;
 587         }
 588
 589         /* first copy the current receive buffers */
 590         overlap = min(size, lp->rx_ring_size);
 591         for (new = 0; new < overlap; new++) {
 592                 new_rx_ring[new] = lp->rx_ring[new];
 593                 new_dma_addr_list[new] = lp->rx_dma_addr[new];
 594                 new_skb_list[new] = lp->rx_skbuff[new];
 595         }
 596         /* now allocate any new buffers needed */
 597         for (; new < size; new++ ) {
 598                 struct sk_buff *rx_skbuff;
 599                 new_skb_list[new] = dev_alloc_skb(PKT_BUF_SZ);
 600                 if (!(rx_skbuff = new_skb_list[new])) {
 601                         /* keep the original lists and buffers */
 602                         if (netif_msg_drv(lp))
 603                                 printk(KERN_ERR
 604                                        "%s: pcnet32_realloc_rx_ring dev_alloc_skb failed.\n",
 605                                        dev->name);
 606                         goto free_all_new;
 607                 }
 608                 skb_reserve(rx_skbuff, 2);
 609
 610                 new_dma_addr_list[new] =
 611                             pci_map_single(lp->pci_dev, rx_skbuff->data,
 612                                            PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 613                 new_rx_ring[new].base = cpu_to_le32(new_dma_addr_list[new]);
 614                 new_rx_ring[new].buf_length = cpu_to_le16(2 - PKT_BUF_SZ);
 615                 new_rx_ring[new].status = cpu_to_le16(0x8000);
 616         }
 617         /* and free any unneeded buffers */
 618         for (; new < lp->rx_ring_size; new++) {
 619                 if (lp->rx_skbuff[new]) {
 620                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[new],
 621                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 622                         dev_kfree_skb(lp->rx_skbuff[new]);
 623                 }
 624         }
 625
 626         kfree(lp->rx_skbuff);
 627         kfree(lp->rx_dma_addr);
 628         pci_free_consistent(lp->pci_dev,
 629                             sizeof(struct pcnet32_rx_head) *
 630                             lp->rx_ring_size, lp->rx_ring,
 631                             lp->rx_ring_dma_addr);
 632
 633         lp->rx_ring_size = (1 << size);
 634         lp->rx_mod_mask = lp->rx_ring_size - 1;
 635         lp->rx_len_bits = (size << 4);
 636         lp->rx_ring = new_rx_ring;
 637         lp->rx_ring_dma_addr = new_ring_dma_addr;
 638         lp->rx_dma_addr = new_dma_addr_list;
 639         lp->rx_skbuff = new_skb_list;
 640         return;
 641
 642     free_all_new:
 643         for (; --new >= lp->rx_ring_size; ) {
 644                 if (new_skb_list[new]) {
 645                         pci_unmap_single(lp->pci_dev, new_dma_addr_list[new],
 646                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 647                         dev_kfree_skb(new_skb_list[new]);
 648                 }
 649         }
 650         kfree(new_skb_list);
 651     free_new_lists:
 652         kfree(new_dma_addr_list);
 653     free_new_rx_ring:
 654         pci_free_consistent(lp->pci_dev,
 655                             sizeof(struct pcnet32_rx_head) *
 656                             (1 << size),
 657                             new_rx_ring,
 658                             new_ring_dma_addr);
 659         return;
 660 }
 661
 662 static void pcnet32_purge_rx_ring(struct net_device *dev)
 663 {
 664         struct pcnet32_private *lp = netdev_priv(dev);
 665         int i;
 666
 667         /* free all allocated skbuffs */
 668         for (i = 0; i < lp->rx_ring_size; i++) {
 669                 lp->rx_ring[i].status = 0;      /* CPU owns buffer */
 670                 wmb();          /* Make sure adapter sees owner change */
 671                 if (lp->rx_skbuff[i]) {
 672                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i],
 673                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 674                         dev_kfree_skb_any(lp->rx_skbuff[i]);
 675                 }
 676                 lp->rx_skbuff[i] = NULL;
 677                 lp->rx_dma_addr[i] = 0;
 678         }
 679 }
 680
 681 #ifdef CONFIG_NET_POLL_CONTROLLER
 682 static void pcnet32_poll_controller(struct net_device *dev)
 683 {
 684         disable_irq(dev->irq);
 685         pcnet32_interrupt(0, dev);
 686         enable_irq(dev->irq);
 687 }
 688 #endif
 689
 690 static int pcnet32_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 691 {
 692         struct pcnet32_private *lp = netdev_priv(dev);
 693         unsigned long flags;
 694         int r = -EOPNOTSUPP;
 695
 696         if (lp->mii) {
 697                 spin_lock_irqsave(&lp->lock, flags);
 698                 mii_ethtool_gset(&lp->mii_if, cmd);
 699                 spin_unlock_irqrestore(&lp->lock, flags);
 700                 r = 0;
 701         }
 702         return r;
 703 }
 704
 705 static int pcnet32_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 706 {
 707         struct pcnet32_private *lp = netdev_priv(dev);
 708         unsigned long flags;
 709         int r = -EOPNOTSUPP;
 710
 711         if (lp->mii) {
 712                 spin_lock_irqsave(&lp->lock, flags);
 713                 r = mii_ethtool_sset(&lp->mii_if, cmd);
 714                 spin_unlock_irqrestore(&lp->lock, flags);
 715         }
 716         return r;
 717 }
 718
 719 static void pcnet32_get_drvinfo(struct net_device *dev,
 720                                 struct ethtool_drvinfo *info)
 721 {
 722         struct pcnet32_private *lp = netdev_priv(dev);
 723
 724         strcpy(info->driver, DRV_NAME);
 725         strcpy(info->version, DRV_VERSION);
 726         if (lp->pci_dev)
 727                 strcpy(info->bus_info, pci_name(lp->pci_dev));
 728         else
 729                 sprintf(info->bus_info, "VLB 0x%lx", dev->base_addr);
 730 }
 731
 732 static u32 pcnet32_get_link(struct net_device *dev)
 733 {
 734         struct pcnet32_private *lp = netdev_priv(dev);
 735         unsigned long flags;
 736         int r;
 737
 738         spin_lock_irqsave(&lp->lock, flags);
 739         if (lp->mii) {
 740                 r = mii_link_ok(&lp->mii_if);
 741         } else if (lp->chip_version >= PCNET32_79C970A) {
 742                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
 743                 r = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
 744         } else {        /* can not detect link on really old chips */
 745                 r = 1;
 746         }
 747         spin_unlock_irqrestore(&lp->lock, flags);
 748
 749         return r;
 750 }
 751
 752 static u32 pcnet32_get_msglevel(struct net_device *dev)
 753 {
 754         struct pcnet32_private *lp = netdev_priv(dev);
 755         return lp->msg_enable;
 756 }
 757
 758 static void pcnet32_set_msglevel(struct net_device *dev, u32 value)
 759 {
 760         struct pcnet32_private *lp = netdev_priv(dev);
 761         lp->msg_enable = value;
 762 }
 763
 764 static int pcnet32_nway_reset(struct net_device *dev)
 765 {
 766         struct pcnet32_private *lp = netdev_priv(dev);
 767         unsigned long flags;
 768         int r = -EOPNOTSUPP;
 769
 770         if (lp->mii) {
 771                 spin_lock_irqsave(&lp->lock, flags);
 772                 r = mii_nway_restart(&lp->mii_if);
 773                 spin_unlock_irqrestore(&lp->lock, flags);
 774         }
 775         return r;
 776 }
 777
 778 static void pcnet32_get_ringparam(struct net_device *dev,
 779                                   struct ethtool_ringparam *ering)
 780 {
 781         struct pcnet32_private *lp = netdev_priv(dev);
 782
 783         ering->tx_max_pending = TX_MAX_RING_SIZE;
 784         ering->tx_pending = lp->tx_ring_size;
 785         ering->rx_max_pending = RX_MAX_RING_SIZE;
 786         ering->rx_pending = lp->rx_ring_size;
 787 }
 788
 789 static int pcnet32_set_ringparam(struct net_device *dev,
 790                                  struct ethtool_ringparam *ering)
 791 {
 792         struct pcnet32_private *lp = netdev_priv(dev);
 793         unsigned long flags;
 794         unsigned int size;
 795         ulong ioaddr = dev->base_addr;
 796         int i;
 797
 798         if (ering->rx_mini_pending || ering->rx_jumbo_pending)
 799                 return -EINVAL;
 800
 801         if (netif_running(dev))
 802                 pcnet32_netif_stop(dev);
 803
 804         spin_lock_irqsave(&lp->lock, flags);
 805         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
 806
 807         size = min(ering->tx_pending, (unsigned int)TX_MAX_RING_SIZE);
 808
 809         /* set the minimum ring size to 4, to allow the loopback test to work
 810          * unchanged.
 811          */
 812         for (i = 2; i <= PCNET32_LOG_MAX_TX_BUFFERS; i++) {
 813                 if (size <= (1 << i))
 814                         break;
 815         }
 816         if ((1 << i) != lp->tx_ring_size)
 817                 pcnet32_realloc_tx_ring(dev, lp, i);
 818
 819         size = min(ering->rx_pending, (unsigned int)RX_MAX_RING_SIZE);
 820         for (i = 2; i <= PCNET32_LOG_MAX_RX_BUFFERS; i++) {
 821                 if (size <= (1 << i))
 822                         break;
 823         }
 824         if ((1 << i) != lp->rx_ring_size)
 825                 pcnet32_realloc_rx_ring(dev, lp, i);
 826
 827         lp->napi.weight = lp->rx_ring_size / 2;
 828
 829         if (netif_running(dev)) {
 830                 pcnet32_netif_start(dev);
 831                 pcnet32_restart(dev, CSR0_NORMAL);
 832         }
 833
 834         spin_unlock_irqrestore(&lp->lock, flags);
 835
 836         if (netif_msg_drv(lp))
 837                 printk(KERN_INFO
 838                        "%s: Ring Param Settings: RX: %d, TX: %d\n", dev->name,
 839                        lp->rx_ring_size, lp->tx_ring_size);
 840
 841         return 0;
 842 }
 843
 844 static void pcnet32_get_strings(struct net_device *dev, u32 stringset,
 845                                 u8 * data)
 846 {
 847         memcpy(data, pcnet32_gstrings_test, sizeof(pcnet32_gstrings_test));
 848 }
 849
 850 static int pcnet32_get_sset_count(struct net_device *dev, int sset)
 851 {
 852         switch (sset) {
 853         case ETH_SS_TEST:
 854                 return PCNET32_TEST_LEN;
 855         default:
 856                 return -EOPNOTSUPP;
 857         }
 858 }
 859
 860 static void pcnet32_ethtool_test(struct net_device *dev,
 861                                  struct ethtool_test *test, u64 * data)
 862 {
 863         struct pcnet32_private *lp = netdev_priv(dev);
 864         int rc;
 865
 866         if (test->flags == ETH_TEST_FL_OFFLINE) {
 867                 rc = pcnet32_loopback_test(dev, data);
 868                 if (rc) {
 869                         if (netif_msg_hw(lp))
 870                                 printk(KERN_DEBUG "%s: Loopback test failed.\n",
 871                                        dev->name);
 872                         test->flags |= ETH_TEST_FL_FAILED;
 873                 } else if (netif_msg_hw(lp))
 874                         printk(KERN_DEBUG "%s: Loopback test passed.\n",
 875                                dev->name);
 876         } else if (netif_msg_hw(lp))
 877                 printk(KERN_DEBUG
 878                        "%s: No tests to run (specify 'Offline' on ethtool).",
 879                        dev->name);
 880 }                               /* end pcnet32_ethtool_test */
 881
 882 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1)
 883 {
 884         struct pcnet32_private *lp = netdev_priv(dev);
 885         struct pcnet32_access *a = &lp->a;      /* access to registers */
 886         ulong ioaddr = dev->base_addr;  /* card base I/O address */
 887         struct sk_buff *skb;    /* sk buff */
 888         int x, i;               /* counters */
 889         int numbuffs = 4;       /* number of TX/RX buffers and descs */
 890         u16 status = 0x8300;    /* TX ring status */
 891         __le16 teststatus;      /* test of ring status */
 892         int rc;                 /* return code */
 893         int size;               /* size of packets */
 894         unsigned char *packet;  /* source packet data */
 895         static const int data_len = 60; /* length of source packets */
 896         unsigned long flags;
 897         unsigned long ticks;
 898
 899         rc = 1;                 /* default to fail */
 900
 901         if (netif_running(dev))
 902 #ifdef CONFIG_PCNET32_NAPI
 903                 pcnet32_netif_stop(dev);
 904 #else
 905                 pcnet32_close(dev);
 906 #endif
 907
 908         spin_lock_irqsave(&lp->lock, flags);
 909         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
 910
 911         numbuffs = min(numbuffs, (int)min(lp->rx_ring_size, lp->tx_ring_size));
 912
 913         /* Reset the PCNET32 */
 914         lp->a.reset(ioaddr);
 915         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
 916
 917         /* switch pcnet32 to 32bit mode */
 918         lp->a.write_bcr(ioaddr, 20, 2);
 919
 920         /* purge & init rings but don't actually restart */
 921         pcnet32_restart(dev, 0x0000);
 922
 923         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
 924
 925         /* Initialize Transmit buffers. */
 926         size = data_len + 15;
 927         for (x = 0; x < numbuffs; x++) {
 928                 if (!(skb = dev_alloc_skb(size))) {
 929                         if (netif_msg_hw(lp))
 930                                 printk(KERN_DEBUG
 931                                        "%s: Cannot allocate skb at line: %d!\n",
 932                                        dev->name, __LINE__);
 933                         goto clean_up;
 934                 } else {
 935                         packet = skb->data;
 936                         skb_put(skb, size);     /* create space for data */
 937                         lp->tx_skbuff[x] = skb;
 938                         lp->tx_ring[x].length = cpu_to_le16(-skb->len);
 939                         lp->tx_ring[x].misc = 0;
 940
 941                         /* put DA and SA into the skb */
 942                         for (i = 0; i < 6; i++)
 943                                 *packet++ = dev->dev_addr[i];
 944                         for (i = 0; i < 6; i++)
 945                                 *packet++ = dev->dev_addr[i];
 946                         /* type */
 947                         *packet++ = 0x08;
 948                         *packet++ = 0x06;
 949                         /* packet number */
 950                         *packet++ = x;
 951                         /* fill packet with data */
 952                         for (i = 0; i < data_len; i++)
 953                                 *packet++ = i;
 954
 955                         lp->tx_dma_addr[x] =
 956                             pci_map_single(lp->pci_dev, skb->data, skb->len,
 957                                            PCI_DMA_TODEVICE);
 958                         lp->tx_ring[x].base = cpu_to_le32(lp->tx_dma_addr[x]);
 959                         wmb();  /* Make sure owner changes after all others are visible */
 960                         lp->tx_ring[x].status = cpu_to_le16(status);
 961                 }
 962         }
 963
 964         x = a->read_bcr(ioaddr, 32);    /* set internal loopback in BCR32 */
 965         a->write_bcr(ioaddr, 32, x | 0x0002);
 966
 967         /* set int loopback in CSR15 */
 968         x = a->read_csr(ioaddr, CSR15) & 0xfffc;
 969         lp->a.write_csr(ioaddr, CSR15, x | 0x0044);
 970
 971         teststatus = cpu_to_le16(0x8000);
 972         lp->a.write_csr(ioaddr, CSR0, CSR0_START);      /* Set STRT bit */
 973
 974         /* Check status of descriptors */
 975         for (x = 0; x < numbuffs; x++) {
 976                 ticks = 0;
 977                 rmb();
 978                 while ((lp->rx_ring[x].status & teststatus) && (ticks < 200)) {
 979                         spin_unlock_irqrestore(&lp->lock, flags);
 980                         msleep(1);
 981                         spin_lock_irqsave(&lp->lock, flags);
 982                         rmb();
 983                         ticks++;
 984                 }
 985                 if (ticks == 200) {
 986                         if (netif_msg_hw(lp))
 987                                 printk("%s: Desc %d failed to reset!\n",
 988                                        dev->name, x);
 989                         break;
 990                 }
 991         }
 992
 993         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
 994         wmb();
 995         if (netif_msg_hw(lp) && netif_msg_pktdata(lp)) {
 996                 printk(KERN_DEBUG "%s: RX loopback packets:\n", dev->name);
 997
 998                 for (x = 0; x < numbuffs; x++) {
 999                         printk(KERN_DEBUG "%s: Packet %d:\n", dev->name, x);
1000                         skb = lp->rx_skbuff[x];
1001                         for (i = 0; i < size; i++) {
1002                                 printk("%02x ", *(skb->data + i));
1003                         }
1004                         printk("\n");
1005                 }
1006         }
1007
1008         x = 0;
1009         rc = 0;
1010         while (x < numbuffs && !rc) {
1011                 skb = lp->rx_skbuff[x];
1012                 packet = lp->tx_skbuff[x]->data;
1013                 for (i = 0; i < size; i++) {
1014                         if (*(skb->data + i) != packet[i]) {
1015                                 if (netif_msg_hw(lp))
1016                                         printk(KERN_DEBUG
1017                                                "%s: Error in compare! %2x - %02x %02x\n",
1018                                                dev->name, i, *(skb->data + i),
1019                                                packet[i]);
1020                                 rc = 1;
1021                                 break;
1022                         }
1023                 }
1024                 x++;
1025         }
1026
1027       clean_up:
1028         *data1 = rc;
1029         pcnet32_purge_tx_ring(dev);
1030
1031         x = a->read_csr(ioaddr, CSR15);
1032         a->write_csr(ioaddr, CSR15, (x & ~0x0044));     /* reset bits 6 and 2 */
1033
1034         x = a->read_bcr(ioaddr, 32);    /* reset internal loopback */
1035         a->write_bcr(ioaddr, 32, (x & ~0x0002));
1036
1037 #ifdef CONFIG_PCNET32_NAPI
1038         if (netif_running(dev)) {
1039                 pcnet32_netif_start(dev);
1040                 pcnet32_restart(dev, CSR0_NORMAL);
1041         } else {
1042                 pcnet32_purge_rx_ring(dev);
1043                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1044         }
1045         spin_unlock_irqrestore(&lp->lock, flags);
1046 #else
1047         if (netif_running(dev)) {
1048                 spin_unlock_irqrestore(&lp->lock, flags);
1049                 pcnet32_open(dev);
1050         } else {
1051                 pcnet32_purge_rx_ring(dev);
1052                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1053                 spin_unlock_irqrestore(&lp->lock, flags);
1054         }
1055 #endif
1056
1057         return (rc);
1058 }                               /* end pcnet32_loopback_test  */
1059
1060 static void pcnet32_led_blink_callback(struct net_device *dev)
1061 {
1062         struct pcnet32_private *lp = netdev_priv(dev);
1063         struct pcnet32_access *a = &lp->a;
1064         ulong ioaddr = dev->base_addr;
1065         unsigned long flags;
1066         int i;
1067
1068         spin_lock_irqsave(&lp->lock, flags);
1069         for (i = 4; i < 8; i++) {
1070                 a->write_bcr(ioaddr, i, a->read_bcr(ioaddr, i) ^ 0x4000);
1071         }
1072         spin_unlock_irqrestore(&lp->lock, flags);
1073
1074         mod_timer(&lp->blink_timer, PCNET32_BLINK_TIMEOUT);
1075 }
1076
1077 static int pcnet32_phys_id(struct net_device *dev, u32 data)
1078 {
1079         struct pcnet32_private *lp = netdev_priv(dev);
1080         struct pcnet32_access *a = &lp->a;
1081         ulong ioaddr = dev->base_addr;
1082         unsigned long flags;
1083         int i, regs[4];
1084
1085         if (!lp->blink_timer.function) {
1086                 init_timer(&lp->blink_timer);
1087                 lp->blink_timer.function = (void *)pcnet32_led_blink_callback;
1088                 lp->blink_timer.data = (unsigned long)dev;
1089         }
1090
1091         /* Save the current value of the bcrs */
1092         spin_lock_irqsave(&lp->lock, flags);
1093         for (i = 4; i < 8; i++) {
1094                 regs[i - 4] = a->read_bcr(ioaddr, i);
1095         }
1096         spin_unlock_irqrestore(&lp->lock, flags);
1097
1098         mod_timer(&lp->blink_timer, jiffies);
1099         set_current_state(TASK_INTERRUPTIBLE);
1100
1101         /* AV: the limit here makes no sense whatsoever */
1102         if ((!data) || (data > (u32) (MAX_SCHEDULE_TIMEOUT / HZ)))
1103                 data = (u32) (MAX_SCHEDULE_TIMEOUT / HZ);
1104
1105         msleep_interruptible(data * 1000);
1106         del_timer_sync(&lp->blink_timer);
1107
1108         /* Restore the original value of the bcrs */
1109         spin_lock_irqsave(&lp->lock, flags);
1110         for (i = 4; i < 8; i++) {
1111                 a->write_bcr(ioaddr, i, regs[i - 4]);
1112         }
1113         spin_unlock_irqrestore(&lp->lock, flags);
1114
1115         return 0;
1116 }
1117
1118 /*
1119  * lp->lock must be held.
1120  */
1121 static int pcnet32_suspend(struct net_device *dev, unsigned long *flags,
1122                 int can_sleep)
1123 {
1124         int csr5;
1125         struct pcnet32_private *lp = netdev_priv(dev);
1126         struct pcnet32_access *a = &lp->a;
1127         ulong ioaddr = dev->base_addr;
1128         int ticks;
1129
1130         /* really old chips have to be stopped. */
1131         if (lp->chip_version < PCNET32_79C970A)
1132                 return 0;
1133
1134         /* set SUSPEND (SPND) - CSR5 bit 0 */
1135         csr5 = a->read_csr(ioaddr, CSR5);
1136         a->write_csr(ioaddr, CSR5, csr5 | CSR5_SUSPEND);
1137
1138         /* poll waiting for bit to be set */
1139         ticks = 0;
1140         while (!(a->read_csr(ioaddr, CSR5) & CSR5_SUSPEND)) {
1141                 spin_unlock_irqrestore(&lp->lock, *flags);
1142                 if (can_sleep)
1143                         msleep(1);
1144                 else
1145                         mdelay(1);
1146                 spin_lock_irqsave(&lp->lock, *flags);
1147                 ticks++;
1148                 if (ticks > 200) {
1149                         if (netif_msg_hw(lp))
1150                                 printk(KERN_DEBUG
1151                                        "%s: Error getting into suspend!\n",
1152                                        dev->name);
1153                         return 0;
1154                 }
1155         }
1156         return 1;
1157 }
1158
1159 /*
1160  * process one receive descriptor entry
1161  */
1162
1163 static void pcnet32_rx_entry(struct net_device *dev,
1164                              struct pcnet32_private *lp,
1165                              struct pcnet32_rx_head *rxp,
1166                              int entry)
1167 {
1168         int status = (short)le16_to_cpu(rxp->status) >> 8;
1169         int rx_in_place = 0;
1170         struct sk_buff *skb;
1171         short pkt_len;
1172
1173         if (status != 0x03) {   /* There was an error. */
1174                 /*
1175                  * There is a tricky error noted by John Murphy,
1176                  * <murf@perftech.com> to Russ Nelson: Even with full-sized
1177                  * buffers it's possible for a jabber packet to use two
1178                  * buffers, with only the last correctly noting the error.
1179                  */
1180                 if (status & 0x01)      /* Only count a general error at the */
1181                         lp->stats.rx_errors++;  /* end of a packet. */
1182                 if (status & 0x20)
1183                         lp->stats.rx_frame_errors++;
1184                 if (status & 0x10)
1185                         lp->stats.rx_over_errors++;
1186                 if (status & 0x08)
1187                         lp->stats.rx_crc_errors++;
1188                 if (status & 0x04)
1189                         lp->stats.rx_fifo_errors++;
1190                 return;
1191         }
1192
1193         pkt_len = (le32_to_cpu(rxp->msg_length) & 0xfff) - 4;
1194
1195         /* Discard oversize frames. */
1196         if (unlikely(pkt_len > PKT_BUF_SZ - 2)) {
1197                 if (netif_msg_drv(lp))
1198                         printk(KERN_ERR "%s: Impossible packet size %d!\n",
1199                                dev->name, pkt_len);
1200                 lp->stats.rx_errors++;
1201                 return;
1202         }
1203         if (pkt_len < 60) {
1204                 if (netif_msg_rx_err(lp))
1205                         printk(KERN_ERR "%s: Runt packet!\n", dev->name);
1206                 lp->stats.rx_errors++;
1207                 return;
1208         }
1209
1210         if (pkt_len > rx_copybreak) {
1211                 struct sk_buff *newskb;
1212
1213                 if ((newskb = dev_alloc_skb(PKT_BUF_SZ))) {
1214                         skb_reserve(newskb, 2);
1215                         skb = lp->rx_skbuff[entry];
1216                         pci_unmap_single(lp->pci_dev,
1217                                          lp->rx_dma_addr[entry],
1218                                          PKT_BUF_SZ - 2,
1219                                          PCI_DMA_FROMDEVICE);
1220                         skb_put(skb, pkt_len);
1221                         lp->rx_skbuff[entry] = newskb;
1222                         lp->rx_dma_addr[entry] =
1223                                             pci_map_single(lp->pci_dev,
1224                                                            newskb->data,
1225                                                            PKT_BUF_SZ - 2,
1226                                                            PCI_DMA_FROMDEVICE);
1227                         rxp->base = cpu_to_le32(lp->rx_dma_addr[entry]);
1228                         rx_in_place = 1;
1229                 } else
1230                         skb = NULL;
1231         } else {
1232                 skb = dev_alloc_skb(pkt_len + 2);
1233         }
1234
1235         if (skb == NULL) {
1236                 if (netif_msg_drv(lp))
1237                         printk(KERN_ERR
1238                                "%s: Memory squeeze, dropping packet.\n",
1239                                dev->name);
1240                 lp->stats.rx_dropped++;
1241                 return;
1242         }
1243         skb->dev = dev;
1244         if (!rx_in_place) {
1245                 skb_reserve(skb, 2);    /* 16 byte align */
1246                 skb_put(skb, pkt_len);  /* Make room */
1247                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1248                                             lp->rx_dma_addr[entry],
1249                                             pkt_len,
1250                                             PCI_DMA_FROMDEVICE);
1251                 skb_copy_to_linear_data(skb,
1252                                  (unsigned char *)(lp->rx_skbuff[entry]->data),
1253                                  pkt_len);
1254                 pci_dma_sync_single_for_device(lp->pci_dev,
1255                                                lp->rx_dma_addr[entry],
1256                                                pkt_len,
1257                                                PCI_DMA_FROMDEVICE);
1258         }
1259         lp->stats.rx_bytes += skb->len;
1260         skb->protocol = eth_type_trans(skb, dev);
1261 #ifdef CONFIG_PCNET32_NAPI
1262         netif_receive_skb(skb);
1263 #else
1264         netif_rx(skb);
1265 #endif
1266         dev->last_rx = jiffies;
1267         lp->stats.rx_packets++;
1268         return;
1269 }
1270
1271 static int pcnet32_rx(struct net_device *dev, int budget)
1272 {
1273         struct pcnet32_private *lp = netdev_priv(dev);
1274         int entry = lp->cur_rx & lp->rx_mod_mask;
1275         struct pcnet32_rx_head *rxp = &lp->rx_ring[entry];
1276         int npackets = 0;
1277
1278         /* If we own the next entry, it's a new packet. Send it up. */
1279         while (npackets < budget && (short)le16_to_cpu(rxp->status) >= 0) {
1280                 pcnet32_rx_entry(dev, lp, rxp, entry);
1281                 npackets += 1;
1282                 /*
1283                  * The docs say that the buffer length isn't touched, but Andrew
1284                  * Boyd of QNX reports that some revs of the 79C965 clear it.
1285                  */
1286                 rxp->buf_length = cpu_to_le16(2 - PKT_BUF_SZ);
1287                 wmb();  /* Make sure owner changes after others are visible */
1288                 rxp->status = cpu_to_le16(0x8000);
1289                 entry = (++lp->cur_rx) & lp->rx_mod_mask;
1290                 rxp = &lp->rx_ring[entry];
1291         }
1292
1293         return npackets;
1294 }
1295
1296 static int pcnet32_tx(struct net_device *dev)
1297 {
1298         struct pcnet32_private *lp = netdev_priv(dev);
1299         unsigned int dirty_tx = lp->dirty_tx;
1300         int delta;
1301         int must_restart = 0;
1302
1303         while (dirty_tx != lp->cur_tx) {
1304                 int entry = dirty_tx & lp->tx_mod_mask;
1305                 int status = (short)le16_to_cpu(lp->tx_ring[entry].status);
1306
1307                 if (status < 0)
1308                         break;  /* It still hasn't been Txed */
1309
1310                 lp->tx_ring[entry].base = 0;
1311
1312                 if (status & 0x4000) {
1313                         /* There was a major error, log it. */
1314                         int err_status = le32_to_cpu(lp->tx_ring[entry].misc);
1315                         lp->stats.tx_errors++;
1316                         if (netif_msg_tx_err(lp))
1317                                 printk(KERN_ERR
1318                                        "%s: Tx error status=%04x err_status=%08x\n",
1319                                        dev->name, status,
1320                                        err_status);
1321                         if (err_status & 0x04000000)
1322                                 lp->stats.tx_aborted_errors++;
1323                         if (err_status & 0x08000000)
1324                                 lp->stats.tx_carrier_errors++;
1325                         if (err_status & 0x10000000)
1326                                 lp->stats.tx_window_errors++;
1327 #ifndef DO_DXSUFLO
1328                         if (err_status & 0x40000000) {
1329                                 lp->stats.tx_fifo_errors++;
1330                                 /* Ackk!  On FIFO errors the Tx unit is turned off! */
1331                                 /* Remove this verbosity later! */
1332                                 if (netif_msg_tx_err(lp))
1333                                         printk(KERN_ERR
1334                                                "%s: Tx FIFO error!\n",
1335                                                dev->name);
1336                                 must_restart = 1;
1337                         }
1338 #else
1339                         if (err_status & 0x40000000) {
1340                                 lp->stats.tx_fifo_errors++;
1341                                 if (!lp->dxsuflo) {     /* If controller doesn't recover ... */
1342                                         /* Ackk!  On FIFO errors the Tx unit is turned off! */
1343                                         /* Remove this verbosity later! */
1344                                         if (netif_msg_tx_err(lp))
1345                                                 printk(KERN_ERR
1346                                                        "%s: Tx FIFO error!\n",
1347                                                        dev->name);
1348                                         must_restart = 1;
1349                                 }
1350                         }
1351 #endif
1352                 } else {
1353                         if (status & 0x1800)
1354                                 lp->stats.collisions++;
1355                         lp->stats.tx_packets++;
1356                 }
1357
1358                 /* We must free the original skb */
1359                 if (lp->tx_skbuff[entry]) {
1360                         pci_unmap_single(lp->pci_dev,
1361                                          lp->tx_dma_addr[entry],
1362                                          lp->tx_skbuff[entry]->
1363                                          len, PCI_DMA_TODEVICE);
1364                         dev_kfree_skb_any(lp->tx_skbuff[entry]);
1365                         lp->tx_skbuff[entry] = NULL;
1366                         lp->tx_dma_addr[entry] = 0;
1367                 }
1368                 dirty_tx++;
1369         }
1370
1371         delta = (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask + lp->tx_ring_size);
1372         if (delta > lp->tx_ring_size) {
1373                 if (netif_msg_drv(lp))
1374                         printk(KERN_ERR
1375                                "%s: out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
1376                                dev->name, dirty_tx, lp->cur_tx,
1377                                lp->tx_full);
1378                 dirty_tx += lp->tx_ring_size;
1379                 delta -= lp->tx_ring_size;
1380         }
1381
1382         if (lp->tx_full &&
1383             netif_queue_stopped(dev) &&
1384             delta < lp->tx_ring_size - 2) {
1385                 /* The ring is no longer full, clear tbusy. */
1386                 lp->tx_full = 0;
1387                 netif_wake_queue(dev);
1388         }
1389         lp->dirty_tx = dirty_tx;
1390
1391         return must_restart;
1392 }
1393
1394 #ifdef CONFIG_PCNET32_NAPI
1395 static int pcnet32_poll(struct napi_struct *napi, int budget)
1396 {
1397         struct pcnet32_private *lp = container_of(napi, struct pcnet32_private, napi);
1398         struct net_device *dev = lp->dev;
1399         unsigned long ioaddr = dev->base_addr;
1400         unsigned long flags;
1401         int work_done;
1402         u16 val;
1403
1404         work_done = pcnet32_rx(dev, budget);
1405
1406         spin_lock_irqsave(&lp->lock, flags);
1407         if (pcnet32_tx(dev)) {
1408                 /* reset the chip to clear the error condition, then restart */
1409                 lp->a.reset(ioaddr);
1410                 lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
1411                 pcnet32_restart(dev, CSR0_START);
1412                 netif_wake_queue(dev);
1413         }
1414         spin_unlock_irqrestore(&lp->lock, flags);
1415
1416         if (work_done < budget) {
1417                 spin_lock_irqsave(&lp->lock, flags);
1418
1419                 __netif_rx_complete(dev, napi);
1420
1421                 /* clear interrupt masks */
1422                 val = lp->a.read_csr(ioaddr, CSR3);
1423                 val &= 0x00ff;
1424                 lp->a.write_csr(ioaddr, CSR3, val);
1425
1426                 /* Set interrupt enable. */
1427                 lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
1428                 mmiowb();
1429                 spin_unlock_irqrestore(&lp->lock, flags);
1430         }
1431         return work_done;
1432 }
1433 #endif
1434
1435 #define PCNET32_REGS_PER_PHY    32
1436 #define PCNET32_MAX_PHYS        32
1437 static int pcnet32_get_regs_len(struct net_device *dev)
1438 {
1439         struct pcnet32_private *lp = netdev_priv(dev);
1440         int j = lp->phycount * PCNET32_REGS_PER_PHY;
1441
1442         return ((PCNET32_NUM_REGS + j) * sizeof(u16));
1443 }
1444
1445 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1446                              void *ptr)
1447 {
1448         int i, csr0;
1449         u16 *buff = ptr;
1450         struct pcnet32_private *lp = netdev_priv(dev);
1451         struct pcnet32_access *a = &lp->a;
1452         ulong ioaddr = dev->base_addr;
1453         unsigned long flags;
1454
1455         spin_lock_irqsave(&lp->lock, flags);
1456
1457         csr0 = a->read_csr(ioaddr, CSR0);
1458         if (!(csr0 & CSR0_STOP))        /* If not stopped */
1459                 pcnet32_suspend(dev, &flags, 1);
1460
1461         /* read address PROM */
1462         for (i = 0; i < 16; i += 2)
1463                 *buff++ = inw(ioaddr + i);
1464
1465         /* read control and status registers */
1466         for (i = 0; i < 90; i++) {
1467                 *buff++ = a->read_csr(ioaddr, i);
1468         }
1469
1470         *buff++ = a->read_csr(ioaddr, 112);
1471         *buff++ = a->read_csr(ioaddr, 114);
1472
1473         /* read bus configuration registers */
1474         for (i = 0; i < 30; i++) {
1475                 *buff++ = a->read_bcr(ioaddr, i);
1476         }
1477         *buff++ = 0;            /* skip bcr30 so as not to hang 79C976 */
1478         for (i = 31; i < 36; i++) {
1479                 *buff++ = a->read_bcr(ioaddr, i);
1480         }
1481
1482         /* read mii phy registers */
1483         if (lp->mii) {
1484                 int j;
1485                 for (j = 0; j < PCNET32_MAX_PHYS; j++) {
1486                         if (lp->phymask & (1 << j)) {
1487                                 for (i = 0; i < PCNET32_REGS_PER_PHY; i++) {
1488                                         lp->a.write_bcr(ioaddr, 33,
1489                                                         (j << 5) | i);
1490                                         *buff++ = lp->a.read_bcr(ioaddr, 34);
1491                                 }
1492                         }
1493                 }
1494         }
1495
1496         if (!(csr0 & CSR0_STOP)) {      /* If not stopped */
1497                 int csr5;
1498
1499                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
1500                 csr5 = a->read_csr(ioaddr, CSR5);
1501                 a->write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
1502         }
1503
1504         spin_unlock_irqrestore(&lp->lock, flags);
1505 }
1506
1507 static const struct ethtool_ops pcnet32_ethtool_ops = {
1508         .get_settings           = pcnet32_get_settings,
1509         .set_settings           = pcnet32_set_settings,
1510         .get_drvinfo            = pcnet32_get_drvinfo,
1511         .get_msglevel           = pcnet32_get_msglevel,
1512         .set_msglevel           = pcnet32_set_msglevel,
1513         .nway_reset             = pcnet32_nway_reset,
1514         .get_link               = pcnet32_get_link,
1515         .get_ringparam          = pcnet32_get_ringparam,
1516         .set_ringparam          = pcnet32_set_ringparam,
1517         .get_strings            = pcnet32_get_strings,
1518         .self_test              = pcnet32_ethtool_test,
1519         .phys_id                = pcnet32_phys_id,
1520         .get_regs_len           = pcnet32_get_regs_len,
1521         .get_regs               = pcnet32_get_regs,
1522         .get_sset_count         = pcnet32_get_sset_count,
1523 };
1524
1525 /* only probes for non-PCI devices, the rest are handled by
1526  * pci_register_driver via pcnet32_probe_pci */
1527
1528 static void __devinit pcnet32_probe_vlbus(unsigned int *pcnet32_portlist)
1529 {
1530         unsigned int *port, ioaddr;
1531
1532         /* search for PCnet32 VLB cards at known addresses */
1533         for (port = pcnet32_portlist; (ioaddr = *port); port++) {
1534                 if (request_region
1535                     (ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_vlbus")) {
1536                         /* check if there is really a pcnet chip on that ioaddr */
1537                         if ((inb(ioaddr + 14) == 0x57)
1538                             && (inb(ioaddr + 15) == 0x57)) {
1539                                 pcnet32_probe1(ioaddr, 0, NULL);
1540                         } else {
1541                                 release_region(ioaddr, PCNET32_TOTAL_SIZE);
1542                         }
1543                 }
1544         }
1545 }
1546
1547 static int __devinit
1548 pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
1549 {
1550         unsigned long ioaddr;
1551         int err;
1552
1553         err = pci_enable_device(pdev);
1554         if (err < 0) {
1555                 if (pcnet32_debug & NETIF_MSG_PROBE)
1556                         printk(KERN_ERR PFX
1557                                "failed to enable device -- err=%d\n", err);
1558                 return err;
1559         }
1560         pci_set_master(pdev);
1561
1562         ioaddr = pci_resource_start(pdev, 0);
1563         if (!ioaddr) {
1564                 if (pcnet32_debug & NETIF_MSG_PROBE)
1565                         printk(KERN_ERR PFX
1566                                "card has no PCI IO resources, aborting\n");
1567                 return -ENODEV;
1568         }
1569
1570         if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
1571                 if (pcnet32_debug & NETIF_MSG_PROBE)
1572                         printk(KERN_ERR PFX
1573                                "architecture does not support 32bit PCI busmaster DMA\n");
1574                 return -ENODEV;
1575         }
1576         if (request_region(ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_pci") ==
1577             NULL) {
1578                 if (pcnet32_debug & NETIF_MSG_PROBE)
1579                         printk(KERN_ERR PFX
1580                                "io address range already allocated\n");
1581                 return -EBUSY;
1582         }
1583
1584         err = pcnet32_probe1(ioaddr, 1, pdev);
1585         if (err < 0) {
1586                 pci_disable_device(pdev);
1587         }
1588         return err;
1589 }
1590
1591 /* pcnet32_probe1
1592  *  Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
1593  *  pdev will be NULL when called from pcnet32_probe_vlbus.
1594  */
1595 static int __devinit
1596 pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
1597 {
1598         struct pcnet32_private *lp;
1599         int i, media;
1600         int fdx, mii, fset, dxsuflo;
1601         int chip_version;
1602         char *chipname;
1603         struct net_device *dev;
1604         struct pcnet32_access *a = NULL;
1605         u8 promaddr[6];
1606         int ret = -ENODEV;
1607
1608         /* reset the chip */
1609         pcnet32_wio_reset(ioaddr);
1610
1611         /* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
1612         if (pcnet32_wio_read_csr(ioaddr, 0) == 4 && pcnet32_wio_check(ioaddr)) {
1613                 a = &pcnet32_wio;
1614         } else {
1615                 pcnet32_dwio_reset(ioaddr);
1616                 if (pcnet32_dwio_read_csr(ioaddr, 0) == 4
1617                     && pcnet32_dwio_check(ioaddr)) {
1618                         a = &pcnet32_dwio;
1619                 } else
1620                         goto err_release_region;
1621         }
1622
1623         chip_version =
1624             a->read_csr(ioaddr, 88) | (a->read_csr(ioaddr, 89) << 16);
1625         if ((pcnet32_debug & NETIF_MSG_PROBE) && (pcnet32_debug & NETIF_MSG_HW))
1626                 printk(KERN_INFO "  PCnet chip version is %#x.\n",
1627                        chip_version);
1628         if ((chip_version & 0xfff) != 0x003) {
1629                 if (pcnet32_debug & NETIF_MSG_PROBE)
1630                         printk(KERN_INFO PFX "Unsupported chip version.\n");
1631                 goto err_release_region;
1632         }
1633
1634         /* initialize variables */
1635         fdx = mii = fset = dxsuflo = 0;
1636         chip_version = (chip_version >> 12) & 0xffff;
1637
1638         switch (chip_version) {
1639         case 0x2420:
1640                 chipname = "PCnet/PCI 79C970";  /* PCI */
1641                 break;
1642         case 0x2430:
1643                 if (shared)
1644                         chipname = "PCnet/PCI 79C970";  /* 970 gives the wrong chip id back */
1645                 else
1646                         chipname = "PCnet/32 79C965";   /* 486/VL bus */
1647                 break;
1648         case 0x2621:
1649                 chipname = "PCnet/PCI II 79C970A";      /* PCI */
1650                 fdx = 1;
1651                 break;
1652         case 0x2623:
1653                 chipname = "PCnet/FAST 79C971"; /* PCI */
1654                 fdx = 1;
1655                 mii = 1;
1656                 fset = 1;
1657                 break;
1658         case 0x2624:
1659                 chipname = "PCnet/FAST+ 79C972";        /* PCI */
1660                 fdx = 1;
1661                 mii = 1;
1662                 fset = 1;
1663                 break;
1664         case 0x2625:
1665                 chipname = "PCnet/FAST III 79C973";     /* PCI */
1666                 fdx = 1;
1667                 mii = 1;
1668                 break;
1669         case 0x2626:
1670                 chipname = "PCnet/Home 79C978"; /* PCI */
1671                 fdx = 1;
1672                 /*
1673                  * This is based on specs published at www.amd.com.  This section
1674                  * assumes that a card with a 79C978 wants to go into standard
1675                  * ethernet mode.  The 79C978 can also go into 1Mb HomePNA mode,
1676                  * and the module option homepna=1 can select this instead.
1677                  */
1678                 media = a->read_bcr(ioaddr, 49);
1679                 media &= ~3;    /* default to 10Mb ethernet */
1680                 if (cards_found < MAX_UNITS && homepna[cards_found])
1681                         media |= 1;     /* switch to home wiring mode */
1682                 if (pcnet32_debug & NETIF_MSG_PROBE)
1683                         printk(KERN_DEBUG PFX "media set to %sMbit mode.\n",
1684                                (media & 1) ? "1" : "10");
1685                 a->write_bcr(ioaddr, 49, media);
1686                 break;
1687         case 0x2627:
1688                 chipname = "PCnet/FAST III 79C975";     /* PCI */
1689                 fdx = 1;
1690                 mii = 1;
1691                 break;
1692         case 0x2628:
1693                 chipname = "PCnet/PRO 79C976";
1694                 fdx = 1;
1695                 mii = 1;
1696                 break;
1697         default:
1698                 if (pcnet32_debug & NETIF_MSG_PROBE)
1699                         printk(KERN_INFO PFX
1700                                "PCnet version %#x, no PCnet32 chip.\n",
1701                                chip_version);
1702                 goto err_release_region;
1703         }
1704
1705         /*
1706          *  On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
1707          *  starting until the packet is loaded. Strike one for reliability, lose
1708          *  one for latency - although on PCI this isnt a big loss. Older chips
1709          *  have FIFO's smaller than a packet, so you can't do this.
1710          *  Turn on BCR18:BurstRdEn and BCR18:BurstWrEn.
1711          */
1712
1713         if (fset) {
1714                 a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0860));
1715                 a->write_csr(ioaddr, 80,
1716                              (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
1717                 dxsuflo = 1;
1718         }
1719
1720         dev = alloc_etherdev(sizeof(*lp));
1721         if (!dev) {
1722                 if (pcnet32_debug & NETIF_MSG_PROBE)
1723                         printk(KERN_ERR PFX "Memory allocation failed.\n");
1724                 ret = -ENOMEM;
1725                 goto err_release_region;
1726         }
1727         SET_NETDEV_DEV(dev, &pdev->dev);
1728
1729         if (pcnet32_debug & NETIF_MSG_PROBE)
1730                 printk(KERN_INFO PFX "%s at %#3lx,", chipname, ioaddr);
1731
1732         /* In most chips, after a chip reset, the ethernet address is read from the
1733          * station address PROM at the base address and programmed into the
1734          * "Physical Address Registers" CSR12-14.
1735          * As a precautionary measure, we read the PROM values and complain if
1736          * they disagree with the CSRs.  If they miscompare, and the PROM addr
1737          * is valid, then the PROM addr is used.
1738          */
1739         for (i = 0; i < 3; i++) {
1740                 unsigned int val;
1741                 val = a->read_csr(ioaddr, i + 12) & 0x0ffff;
1742                 /* There may be endianness issues here. */
1743                 dev->dev_addr[2 * i] = val & 0x0ff;
1744                 dev->dev_addr[2 * i + 1] = (val >> 8) & 0x0ff;
1745         }
1746
1747         /* read PROM address and compare with CSR address */
1748         for (i = 0; i < 6; i++)
1749                 promaddr[i] = inb(ioaddr + i);
1750
1751         if (memcmp(promaddr, dev->dev_addr, 6)
1752             || !is_valid_ether_addr(dev->dev_addr)) {
1753                 if (is_valid_ether_addr(promaddr)) {
1754                         if (pcnet32_debug & NETIF_MSG_PROBE) {
1755                                 printk(" warning: CSR address invalid,\n");
1756                                 printk(KERN_INFO
1757                                        "    using instead PROM address of");
1758                         }
1759                         memcpy(dev->dev_addr, promaddr, 6);
1760                 }
1761         }
1762         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1763
1764         /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
1765         if (!is_valid_ether_addr(dev->perm_addr))
1766                 memset(dev->dev_addr, 0, sizeof(dev->dev_addr));
1767
1768         if (pcnet32_debug & NETIF_MSG_PROBE) {
1769                 for (i = 0; i < 6; i++)
1770                         printk(" %2.2x", dev->dev_addr[i]);
1771
1772                 /* Version 0x2623 and 0x2624 */
1773                 if (((chip_version + 1) & 0xfffe) == 0x2624) {
1774                         i = a->read_csr(ioaddr, 80) & 0x0C00;   /* Check tx_start_pt */
1775                         printk("\n" KERN_INFO "    tx_start_pt(0x%04x):", i);
1776                         switch (i >> 10) {
1777                         case 0:
1778                                 printk("  20 bytes,");
1779                                 break;
1780                         case 1:
1781                                 printk("  64 bytes,");
1782                                 break;
1783                         case 2:
1784                                 printk(" 128 bytes,");
1785                                 break;
1786                         case 3:
1787                                 printk("~220 bytes,");
1788                                 break;
1789                         }
1790                         i = a->read_bcr(ioaddr, 18);    /* Check Burst/Bus control */
1791                         printk(" BCR18(%x):", i & 0xffff);
1792                         if (i & (1 << 5))
1793                                 printk("BurstWrEn ");
1794                         if (i & (1 << 6))
1795                                 printk("BurstRdEn ");
1796                         if (i & (1 << 7))
1797                                 printk("DWordIO ");
1798                         if (i & (1 << 11))
1799                                 printk("NoUFlow ");
1800                         i = a->read_bcr(ioaddr, 25);
1801                         printk("\n" KERN_INFO "    SRAMSIZE=0x%04x,", i << 8);
1802                         i = a->read_bcr(ioaddr, 26);
1803                         printk(" SRAM_BND=0x%04x,", i << 8);
1804                         i = a->read_bcr(ioaddr, 27);
1805                         if (i & (1 << 14))
1806                                 printk("LowLatRx");
1807                 }
1808         }
1809
1810         dev->base_addr = ioaddr;
1811         lp = netdev_priv(dev);
1812         /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
1813         if ((lp->init_block =
1814              pci_alloc_consistent(pdev, sizeof(*lp->init_block), &lp->init_dma_addr)) == NULL) {
1815                 if (pcnet32_debug & NETIF_MSG_PROBE)
1816                         printk(KERN_ERR PFX
1817                                "Consistent memory allocation failed.\n");
1818                 ret = -ENOMEM;
1819                 goto err_free_netdev;
1820         }
1821         lp->pci_dev = pdev;
1822
1823         lp->dev = dev;
1824
1825         spin_lock_init(&lp->lock);
1826
1827         SET_NETDEV_DEV(dev, &pdev->dev);
1828         lp->name = chipname;
1829         lp->shared_irq = shared;
1830         lp->tx_ring_size = TX_RING_SIZE;        /* default tx ring size */
1831         lp->rx_ring_size = RX_RING_SIZE;        /* default rx ring size */
1832         lp->tx_mod_mask = lp->tx_ring_size - 1;
1833         lp->rx_mod_mask = lp->rx_ring_size - 1;
1834         lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
1835         lp->rx_len_bits = (PCNET32_LOG_RX_BUFFERS << 4);
1836         lp->mii_if.full_duplex = fdx;
1837         lp->mii_if.phy_id_mask = 0x1f;
1838         lp->mii_if.reg_num_mask = 0x1f;
1839         lp->dxsuflo = dxsuflo;
1840         lp->mii = mii;
1841         lp->chip_version = chip_version;
1842         lp->msg_enable = pcnet32_debug;
1843         if ((cards_found >= MAX_UNITS)
1844             || (options[cards_found] > sizeof(options_mapping)))
1845                 lp->options = PCNET32_PORT_ASEL;
1846         else
1847                 lp->options = options_mapping[options[cards_found]];
1848         lp->mii_if.dev = dev;
1849         lp->mii_if.mdio_read = mdio_read;
1850         lp->mii_if.mdio_write = mdio_write;
1851
1852 #ifdef CONFIG_PCNET32_NAPI
1853         netif_napi_add(dev, &lp->napi, pcnet32_poll, lp->rx_ring_size / 2);
1854 #endif
1855
1856         if (fdx && !(lp->options & PCNET32_PORT_ASEL) &&
1857             ((cards_found >= MAX_UNITS) || full_duplex[cards_found]))
1858                 lp->options |= PCNET32_PORT_FD;
1859
1860         if (!a) {
1861                 if (pcnet32_debug & NETIF_MSG_PROBE)
1862                         printk(KERN_ERR PFX "No access methods\n");
1863                 ret = -ENODEV;
1864                 goto err_free_consistent;
1865         }
1866         lp->a = *a;
1867
1868         /* prior to register_netdev, dev->name is not yet correct */
1869         if (pcnet32_alloc_ring(dev, pci_name(lp->pci_dev))) {
1870                 ret = -ENOMEM;
1871                 goto err_free_ring;
1872         }
1873         /* detect special T1/E1 WAN card by checking for MAC address */
1874         if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0
1875             && dev->dev_addr[2] == 0x75)
1876                 lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
1877
1878         lp->init_block->mode = cpu_to_le16(0x0003);     /* Disable Rx and Tx. */
1879         lp->init_block->tlen_rlen =
1880             cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
1881         for (i = 0; i < 6; i++)
1882                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
1883         lp->init_block->filter[0] = 0x00000000;
1884         lp->init_block->filter[1] = 0x00000000;
1885         lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
1886         lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
1887
1888         /* switch pcnet32 to 32bit mode */
1889         a->write_bcr(ioaddr, 20, 2);
1890
1891         a->write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
1892         a->write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
1893
1894         if (pdev) {             /* use the IRQ provided by PCI */
1895                 dev->irq = pdev->irq;
1896                 if (pcnet32_debug & NETIF_MSG_PROBE)
1897                         printk(" assigned IRQ %d.\n", dev->irq);
1898         } else {
1899                 unsigned long irq_mask = probe_irq_on();
1900
1901                 /*
1902                  * To auto-IRQ we enable the initialization-done and DMA error
1903                  * interrupts. For ISA boards we get a DMA error, but VLB and PCI
1904                  * boards will work.
1905                  */
1906                 /* Trigger an initialization just for the interrupt. */
1907                 a->write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_INIT);
1908                 mdelay(1);
1909
1910                 dev->irq = probe_irq_off(irq_mask);
1911                 if (!dev->irq) {
1912                         if (pcnet32_debug & NETIF_MSG_PROBE)
1913                                 printk(", failed to detect IRQ line.\n");
1914                         ret = -ENODEV;
1915                         goto err_free_ring;
1916                 }
1917                 if (pcnet32_debug & NETIF_MSG_PROBE)
1918                         printk(", probed IRQ %d.\n", dev->irq);
1919         }
1920
1921         /* Set the mii phy_id so that we can query the link state */
1922         if (lp->mii) {
1923                 /* lp->phycount and lp->phymask are set to 0 by memset above */
1924
1925                 lp->mii_if.phy_id = ((lp->a.read_bcr(ioaddr, 33)) >> 5) & 0x1f;
1926                 /* scan for PHYs */
1927                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
1928                         unsigned short id1, id2;
1929
1930                         id1 = mdio_read(dev, i, MII_PHYSID1);
1931                         if (id1 == 0xffff)
1932                                 continue;
1933                         id2 = mdio_read(dev, i, MII_PHYSID2);
1934                         if (id2 == 0xffff)
1935                                 continue;
1936                         if (i == 31 && ((chip_version + 1) & 0xfffe) == 0x2624)
1937                                 continue;       /* 79C971 & 79C972 have phantom phy at id 31 */
1938                         lp->phycount++;
1939                         lp->phymask |= (1 << i);
1940                         lp->mii_if.phy_id = i;
1941                         if (pcnet32_debug & NETIF_MSG_PROBE)
1942                                 printk(KERN_INFO PFX
1943                                        "Found PHY %04x:%04x at address %d.\n",
1944                                        id1, id2, i);
1945                 }
1946                 lp->a.write_bcr(ioaddr, 33, (lp->mii_if.phy_id) << 5);
1947                 if (lp->phycount > 1) {
1948                         lp->options |= PCNET32_PORT_MII;
1949                 }
1950         }
1951
1952         init_timer(&lp->watchdog_timer);
1953         lp->watchdog_timer.data = (unsigned long)dev;
1954         lp->watchdog_timer.function = (void *)&pcnet32_watchdog;
1955
1956         /* The PCNET32-specific entries in the device structure. */
1957         dev->open = &pcnet32_open;
1958         dev->hard_start_xmit = &pcnet32_start_xmit;
1959         dev->stop = &pcnet32_close;
1960         dev->get_stats = &pcnet32_get_stats;
1961         dev->set_multicast_list = &pcnet32_set_multicast_list;
1962         dev->do_ioctl = &pcnet32_ioctl;
1963         dev->ethtool_ops = &pcnet32_ethtool_ops;
1964         dev->tx_timeout = pcnet32_tx_timeout;
1965         dev->watchdog_timeo = (5 * HZ);
1966
1967 #ifdef CONFIG_NET_POLL_CONTROLLER
1968         dev->poll_controller = pcnet32_poll_controller;
1969 #endif
1970
1971         /* Fill in the generic fields of the device structure. */
1972         if (register_netdev(dev))
1973                 goto err_free_ring;
1974
1975         if (pdev) {
1976                 pci_set_drvdata(pdev, dev);
1977         } else {
1978                 lp->next = pcnet32_dev;
1979                 pcnet32_dev = dev;
1980         }
1981
1982         if (pcnet32_debug & NETIF_MSG_PROBE)
1983                 printk(KERN_INFO "%s: registered as %s\n", dev->name, lp->name);
1984         cards_found++;
1985
1986         /* enable LED writes */
1987         a->write_bcr(ioaddr, 2, a->read_bcr(ioaddr, 2) | 0x1000);
1988
1989         return 0;
1990
1991       err_free_ring:
1992         pcnet32_free_ring(dev);
1993       err_free_consistent:
1994         pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
1995                             lp->init_block, lp->init_dma_addr);
1996       err_free_netdev:
1997         free_netdev(dev);
1998       err_release_region:
1999         release_region(ioaddr, PCNET32_TOTAL_SIZE);
2000         return ret;
2001 }
2002
2003 /* if any allocation fails, caller must also call pcnet32_free_ring */
2004 static int pcnet32_alloc_ring(struct net_device *dev, char *name)
2005 {
2006         struct pcnet32_private *lp = netdev_priv(dev);
2007
2008         lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
2009                                            sizeof(struct pcnet32_tx_head) *
2010                                            lp->tx_ring_size,
2011                                            &lp->tx_ring_dma_addr);
2012         if (lp->tx_ring == NULL) {
2013                 if (netif_msg_drv(lp))
2014                         printk("\n" KERN_ERR PFX
2015                                "%s: Consistent memory allocation failed.\n",
2016                                name);
2017                 return -ENOMEM;
2018         }
2019
2020         lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
2021                                            sizeof(struct pcnet32_rx_head) *
2022                                            lp->rx_ring_size,
2023                                            &lp->rx_ring_dma_addr);
2024         if (lp->rx_ring == NULL) {
2025                 if (netif_msg_drv(lp))
2026                         printk("\n" KERN_ERR PFX
2027                                "%s: Consistent memory allocation failed.\n",
2028                                name);
2029                 return -ENOMEM;
2030         }
2031
2032         lp->tx_dma_addr = kcalloc(lp->tx_ring_size, sizeof(dma_addr_t),
2033                                   GFP_ATOMIC);
2034         if (!lp->tx_dma_addr) {
2035                 if (netif_msg_drv(lp))
2036                         printk("\n" KERN_ERR PFX
2037                                "%s: Memory allocation failed.\n", name);
2038                 return -ENOMEM;
2039         }
2040
2041         lp->rx_dma_addr = kcalloc(lp->rx_ring_size, sizeof(dma_addr_t),
2042                                   GFP_ATOMIC);
2043         if (!lp->rx_dma_addr) {
2044                 if (netif_msg_drv(lp))
2045                         printk("\n" KERN_ERR PFX
2046                                "%s: Memory allocation failed.\n", name);
2047                 return -ENOMEM;
2048         }
2049
2050         lp->tx_skbuff = kcalloc(lp->tx_ring_size, sizeof(struct sk_buff *),
2051                                 GFP_ATOMIC);
2052         if (!lp->tx_skbuff) {
2053                 if (netif_msg_drv(lp))
2054                         printk("\n" KERN_ERR PFX
2055                                "%s: Memory allocation failed.\n", name);
2056                 return -ENOMEM;
2057         }
2058
2059         lp->rx_skbuff = kcalloc(lp->rx_ring_size, sizeof(struct sk_buff *),
2060                                 GFP_ATOMIC);
2061         if (!lp->rx_skbuff) {
2062                 if (netif_msg_drv(lp))
2063                         printk("\n" KERN_ERR PFX
2064                                "%s: Memory allocation failed.\n", name);
2065                 return -ENOMEM;
2066         }
2067
2068         return 0;
2069 }
2070
2071 static void pcnet32_free_ring(struct net_device *dev)
2072 {
2073         struct pcnet32_private *lp = netdev_priv(dev);
2074
2075         kfree(lp->tx_skbuff);
2076         lp->tx_skbuff = NULL;
2077
2078         kfree(lp->rx_skbuff);
2079         lp->rx_skbuff = NULL;
2080
2081         kfree(lp->tx_dma_addr);
2082         lp->tx_dma_addr = NULL;
2083
2084         kfree(lp->rx_dma_addr);
2085         lp->rx_dma_addr = NULL;
2086
2087         if (lp->tx_ring) {
2088                 pci_free_consistent(lp->pci_dev,
2089                                     sizeof(struct pcnet32_tx_head) *
2090                                     lp->tx_ring_size, lp->tx_ring,
2091                                     lp->tx_ring_dma_addr);
2092                 lp->tx_ring = NULL;
2093         }
2094
2095         if (lp->rx_ring) {
2096                 pci_free_consistent(lp->pci_dev,
2097                                     sizeof(struct pcnet32_rx_head) *
2098                                     lp->rx_ring_size, lp->rx_ring,
2099                                     lp->rx_ring_dma_addr);
2100                 lp->rx_ring = NULL;
2101         }
2102 }
2103
2104 static int pcnet32_open(struct net_device *dev)
2105 {
2106         struct pcnet32_private *lp = netdev_priv(dev);
2107         unsigned long ioaddr = dev->base_addr;
2108         u16 val;
2109         int i;
2110         int rc;
2111         unsigned long flags;
2112
2113         if (request_irq(dev->irq, &pcnet32_interrupt,
2114                         lp->shared_irq ? IRQF_SHARED : 0, dev->name,
2115                         (void *)dev)) {
2116                 return -EAGAIN;
2117         }
2118
2119         spin_lock_irqsave(&lp->lock, flags);
2120         /* Check for a valid station address */
2121         if (!is_valid_ether_addr(dev->dev_addr)) {
2122                 rc = -EINVAL;
2123                 goto err_free_irq;
2124         }
2125
2126         /* Reset the PCNET32 */
2127         lp->a.reset(ioaddr);
2128
2129         /* switch pcnet32 to 32bit mode */
2130         lp->a.write_bcr(ioaddr, 20, 2);
2131
2132         if (netif_msg_ifup(lp))
2133                 printk(KERN_DEBUG
2134                        "%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n",
2135                        dev->name, dev->irq, (u32) (lp->tx_ring_dma_addr),
2136                        (u32) (lp->rx_ring_dma_addr),
2137                        (u32) (lp->init_dma_addr));
2138
2139         /* set/reset autoselect bit */
2140         val = lp->a.read_bcr(ioaddr, 2) & ~2;
2141         if (lp->options & PCNET32_PORT_ASEL)
2142                 val |= 2;
2143         lp->a.write_bcr(ioaddr, 2, val);
2144
2145         /* handle full duplex setting */
2146         if (lp->mii_if.full_duplex) {
2147                 val = lp->a.read_bcr(ioaddr, 9) & ~3;
2148                 if (lp->options & PCNET32_PORT_FD) {
2149                         val |= 1;
2150                         if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
2151                                 val |= 2;
2152                 } else if (lp->options & PCNET32_PORT_ASEL) {
2153                         /* workaround of xSeries250, turn on for 79C975 only */
2154                         if (lp->chip_version == 0x2627)
2155                                 val |= 3;
2156                 }
2157                 lp->a.write_bcr(ioaddr, 9, val);
2158         }
2159
2160         /* set/reset GPSI bit in test register */
2161         val = lp->a.read_csr(ioaddr, 124) & ~0x10;
2162         if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
2163                 val |= 0x10;
2164         lp->a.write_csr(ioaddr, 124, val);
2165
2166         /* Allied Telesyn AT 2700/2701 FX are 100Mbit only and do not negotiate */
2167         if (lp->pci_dev->subsystem_vendor == PCI_VENDOR_ID_AT &&
2168             (lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
2169              lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
2170                 if (lp->options & PCNET32_PORT_ASEL) {
2171                         lp->options = PCNET32_PORT_FD | PCNET32_PORT_100;
2172                         if (netif_msg_link(lp))
2173                                 printk(KERN_DEBUG
2174                                        "%s: Setting 100Mb-Full Duplex.\n",
2175                                        dev->name);
2176                 }
2177         }
2178         if (lp->phycount < 2) {
2179                 /*
2180                  * 24 Jun 2004 according AMD, in order to change the PHY,
2181                  * DANAS (or DISPM for 79C976) must be set; then select the speed,
2182                  * duplex, and/or enable auto negotiation, and clear DANAS
2183                  */
2184                 if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
2185                         lp->a.write_bcr(ioaddr, 32,
2186                                         lp->a.read_bcr(ioaddr, 32) | 0x0080);
2187                         /* disable Auto Negotiation, set 10Mpbs, HD */
2188                         val = lp->a.read_bcr(ioaddr, 32) & ~0xb8;
2189                         if (lp->options & PCNET32_PORT_FD)
2190                                 val |= 0x10;
2191                         if (lp->options & PCNET32_PORT_100)
2192                                 val |= 0x08;
2193                         lp->a.write_bcr(ioaddr, 32, val);
2194                 } else {
2195                         if (lp->options & PCNET32_PORT_ASEL) {
2196                                 lp->a.write_bcr(ioaddr, 32,
2197                                                 lp->a.read_bcr(ioaddr,
2198                                                                32) | 0x0080);
2199                                 /* enable auto negotiate, setup, disable fd */
2200                                 val = lp->a.read_bcr(ioaddr, 32) & ~0x98;
2201                                 val |= 0x20;
2202                                 lp->a.write_bcr(ioaddr, 32, val);
2203                         }
2204                 }
2205         } else {
2206                 int first_phy = -1;
2207                 u16 bmcr;
2208                 u32 bcr9;
2209                 struct ethtool_cmd ecmd;
2210
2211                 /*
2212                  * There is really no good other way to handle multiple PHYs
2213                  * other than turning off all automatics
2214                  */
2215                 val = lp->a.read_bcr(ioaddr, 2);
2216                 lp->a.write_bcr(ioaddr, 2, val & ~2);
2217                 val = lp->a.read_bcr(ioaddr, 32);
2218                 lp->a.write_bcr(ioaddr, 32, val & ~(1 << 7));   /* stop MII manager */
2219
2220                 if (!(lp->options & PCNET32_PORT_ASEL)) {
2221                         /* setup ecmd */
2222                         ecmd.port = PORT_MII;
2223                         ecmd.transceiver = XCVR_INTERNAL;
2224                         ecmd.autoneg = AUTONEG_DISABLE;
2225                         ecmd.speed =
2226                             lp->
2227                             options & PCNET32_PORT_100 ? SPEED_100 : SPEED_10;
2228                         bcr9 = lp->a.read_bcr(ioaddr, 9);
2229
2230                         if (lp->options & PCNET32_PORT_FD) {
2231                                 ecmd.duplex = DUPLEX_FULL;
2232                                 bcr9 |= (1 << 0);
2233                         } else {
2234                                 ecmd.duplex = DUPLEX_HALF;
2235                                 bcr9 |= ~(1 << 0);
2236                         }
2237                         lp->a.write_bcr(ioaddr, 9, bcr9);
2238                 }
2239
2240                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2241                         if (lp->phymask & (1 << i)) {
2242                                 /* isolate all but the first PHY */
2243                                 bmcr = mdio_read(dev, i, MII_BMCR);
2244                                 if (first_phy == -1) {
2245                                         first_phy = i;
2246                                         mdio_write(dev, i, MII_BMCR,
2247                                                    bmcr & ~BMCR_ISOLATE);
2248                                 } else {
2249                                         mdio_write(dev, i, MII_BMCR,
2250                                                    bmcr | BMCR_ISOLATE);
2251                                 }
2252                                 /* use mii_ethtool_sset to setup PHY */
2253                                 lp->mii_if.phy_id = i;
2254                                 ecmd.phy_address = i;
2255                                 if (lp->options & PCNET32_PORT_ASEL) {
2256                                         mii_ethtool_gset(&lp->mii_if, &ecmd);
2257                                         ecmd.autoneg = AUTONEG_ENABLE;
2258                                 }
2259                                 mii_ethtool_sset(&lp->mii_if, &ecmd);
2260                         }
2261                 }
2262                 lp->mii_if.phy_id = first_phy;
2263                 if (netif_msg_link(lp))
2264                         printk(KERN_INFO "%s: Using PHY number %d.\n",
2265                                dev->name, first_phy);
2266         }
2267
2268 #ifdef DO_DXSUFLO
2269         if (lp->dxsuflo) {      /* Disable transmit stop on underflow */
2270                 val = lp->a.read_csr(ioaddr, CSR3);
2271                 val |= 0x40;
2272                 lp->a.write_csr(ioaddr, CSR3, val);
2273         }
2274 #endif
2275
2276         lp->init_block->mode =
2277             cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2278         pcnet32_load_multicast(dev);
2279
2280         if (pcnet32_init_ring(dev)) {
2281                 rc = -ENOMEM;
2282                 goto err_free_ring;
2283         }
2284
2285 #ifdef CONFIG_PCNET32_NAPI
2286         napi_enable(&lp->napi);
2287 #endif
2288
2289         /* Re-initialize the PCNET32, and start it when done. */
2290         lp->a.write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
2291         lp->a.write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
2292
2293         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
2294         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2295
2296         netif_start_queue(dev);
2297
2298         if (lp->chip_version >= PCNET32_79C970A) {
2299                 /* Print the link status and start the watchdog */
2300                 pcnet32_check_media(dev, 1);
2301                 mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
2302         }
2303
2304         i = 0;
2305         while (i++ < 100)
2306                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2307                         break;
2308         /*
2309          * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
2310          * reports that doing so triggers a bug in the '974.
2311          */
2312         lp->a.write_csr(ioaddr, CSR0, CSR0_NORMAL);
2313
2314         if (netif_msg_ifup(lp))
2315                 printk(KERN_DEBUG
2316                        "%s: pcnet32 open after %d ticks, init block %#x csr0 %4.4x.\n",
2317                        dev->name, i,
2318                        (u32) (lp->init_dma_addr),
2319                        lp->a.read_csr(ioaddr, CSR0));
2320
2321         spin_unlock_irqrestore(&lp->lock, flags);
2322
2323         return 0;               /* Always succeed */
2324
2325       err_free_ring:
2326         /* free any allocated skbuffs */
2327         pcnet32_purge_rx_ring(dev);
2328
2329         /*
2330          * Switch back to 16bit mode to avoid problems with dumb
2331          * DOS packet driver after a warm reboot
2332          */
2333         lp->a.write_bcr(ioaddr, 20, 4);
2334
2335       err_free_irq:
2336         spin_unlock_irqrestore(&lp->lock, flags);
2337         free_irq(dev->irq, dev);
2338         return rc;
2339 }
2340
2341 /*
2342  * The LANCE has been halted for one reason or another (busmaster memory
2343  * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
2344  * etc.).  Modern LANCE variants always reload their ring-buffer
2345  * configuration when restarted, so we must reinitialize our ring
2346  * context before restarting.  As part of this reinitialization,
2347  * find all packets still on the Tx ring and pretend that they had been
2348  * sent (in effect, drop the packets on the floor) - the higher-level
2349  * protocols will time out and retransmit.  It'd be better to shuffle
2350  * these skbs to a temp list and then actually re-Tx them after
2351  * restarting the chip, but I'm too lazy to do so right now.  dplatt@3do.com
2352  */
2353
2354 static void pcnet32_purge_tx_ring(struct net_device *dev)
2355 {
2356         struct pcnet32_private *lp = netdev_priv(dev);
2357         int i;
2358
2359         for (i = 0; i < lp->tx_ring_size; i++) {
2360                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2361                 wmb();          /* Make sure adapter sees owner change */
2362                 if (lp->tx_skbuff[i]) {
2363                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i],
2364                                          lp->tx_skbuff[i]->len,
2365                                          PCI_DMA_TODEVICE);
2366                         dev_kfree_skb_any(lp->tx_skbuff[i]);
2367                 }
2368                 lp->tx_skbuff[i] = NULL;
2369                 lp->tx_dma_addr[i] = 0;
2370         }
2371 }
2372
2373 /* Initialize the PCNET32 Rx and Tx rings. */
2374 static int pcnet32_init_ring(struct net_device *dev)
2375 {
2376         struct pcnet32_private *lp = netdev_priv(dev);
2377         int i;
2378
2379         lp->tx_full = 0;
2380         lp->cur_rx = lp->cur_tx = 0;
2381         lp->dirty_rx = lp->dirty_tx = 0;
2382
2383         for (i = 0; i < lp->rx_ring_size; i++) {
2384                 struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
2385                 if (rx_skbuff == NULL) {
2386                         if (!
2387                             (rx_skbuff = lp->rx_skbuff[i] =
2388                              dev_alloc_skb(PKT_BUF_SZ))) {
2389                                 /* there is not much, we can do at this point */
2390                                 if (netif_msg_drv(lp))
2391                                         printk(KERN_ERR
2392                                                "%s: pcnet32_init_ring dev_alloc_skb failed.\n",
2393                                                dev->name);
2394                                 return -1;
2395                         }
2396                         skb_reserve(rx_skbuff, 2);
2397                 }
2398
2399                 rmb();
2400                 if (lp->rx_dma_addr[i] == 0)
2401                         lp->rx_dma_addr[i] =
2402                             pci_map_single(lp->pci_dev, rx_skbuff->data,
2403                                            PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
2404                 lp->rx_ring[i].base = cpu_to_le32(lp->rx_dma_addr[i]);
2405                 lp->rx_ring[i].buf_length = cpu_to_le16(2 - PKT_BUF_SZ);
2406                 wmb();          /* Make sure owner changes after all others are visible */
2407                 lp->rx_ring[i].status = cpu_to_le16(0x8000);
2408         }
2409         /* The Tx buffer address is filled in as needed, but we do need to clear
2410          * the upper ownership bit. */
2411         for (i = 0; i < lp->tx_ring_size; i++) {
2412                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2413                 wmb();          /* Make sure adapter sees owner change */
2414                 lp->tx_ring[i].base = 0;
2415                 lp->tx_dma_addr[i] = 0;
2416         }
2417
2418         lp->init_block->tlen_rlen =
2419             cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
2420         for (i = 0; i < 6; i++)
2421                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
2422         lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
2423         lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
2424         wmb();                  /* Make sure all changes are visible */
2425         return 0;
2426 }
2427
2428 /* the pcnet32 has been issued a stop or reset.  Wait for the stop bit
2429  * then flush the pending transmit operations, re-initialize the ring,
2430  * and tell the chip to initialize.
2431  */
2432 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
2433 {
2434         struct pcnet32_private *lp = netdev_priv(dev);
2435         unsigned long ioaddr = dev->base_addr;
2436         int i;
2437
2438         /* wait for stop */
2439         for (i = 0; i < 100; i++)
2440                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_STOP)
2441                         break;
2442
2443         if (i >= 100 && netif_msg_drv(lp))
2444                 printk(KERN_ERR
2445                        "%s: pcnet32_restart timed out waiting for stop.\n",
2446                        dev->name);
2447
2448         pcnet32_purge_tx_ring(dev);
2449         if (pcnet32_init_ring(dev))
2450                 return;
2451
2452         /* ReInit Ring */
2453         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2454         i = 0;
2455         while (i++ < 1000)
2456                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2457                         break;
2458
2459         lp->a.write_csr(ioaddr, CSR0, csr0_bits);
2460 }
2461
2462 static void pcnet32_tx_timeout(struct net_device *dev)
2463 {
2464         struct pcnet32_private *lp = netdev_priv(dev);
2465         unsigned long ioaddr = dev->base_addr, flags;
2466
2467         spin_lock_irqsave(&lp->lock, flags);
2468         /* Transmitter timeout, serious problems. */
2469         if (pcnet32_debug & NETIF_MSG_DRV)
2470                 printk(KERN_ERR
2471                        "%s: transmit timed out, status %4.4x, resetting.\n",
2472                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2473         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2474         lp->stats.tx_errors++;
2475         if (netif_msg_tx_err(lp)) {
2476                 int i;
2477                 printk(KERN_DEBUG
2478                        " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
2479                        lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
2480                        lp->cur_rx);
2481                 for (i = 0; i < lp->rx_ring_size; i++)
2482                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2483                                le32_to_cpu(lp->rx_ring[i].base),
2484                                (-le16_to_cpu(lp->rx_ring[i].buf_length)) &
2485                                0xffff, le32_to_cpu(lp->rx_ring[i].msg_length),
2486                                le16_to_cpu(lp->rx_ring[i].status));
2487                 for (i = 0; i < lp->tx_ring_size; i++)
2488                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2489                                le32_to_cpu(lp->tx_ring[i].base),
2490                                (-le16_to_cpu(lp->tx_ring[i].length)) & 0xffff,
2491                                le32_to_cpu(lp->tx_ring[i].misc),
2492                                le16_to_cpu(lp->tx_ring[i].status));
2493                 printk("\n");
2494         }
2495         pcnet32_restart(dev, CSR0_NORMAL);
2496
2497         dev->trans_start = jiffies;
2498         netif_wake_queue(dev);
2499
2500         spin_unlock_irqrestore(&lp->lock, flags);
2501 }
2502
2503 static int pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
2504 {
2505         struct pcnet32_private *lp = netdev_priv(dev);
2506         unsigned long ioaddr = dev->base_addr;
2507         u16 status;
2508         int entry;
2509         unsigned long flags;
2510
2511         spin_lock_irqsave(&lp->lock, flags);
2512
2513         if (netif_msg_tx_queued(lp)) {
2514                 printk(KERN_DEBUG
2515                        "%s: pcnet32_start_xmit() called, csr0 %4.4x.\n",
2516                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2517         }
2518
2519         /* Default status -- will not enable Successful-TxDone
2520          * interrupt when that option is available to us.
2521          */
2522         status = 0x8300;
2523
2524         /* Fill in a Tx ring entry */
2525
2526         /* Mask to ring buffer boundary. */
2527         entry = lp->cur_tx & lp->tx_mod_mask;
2528
2529         /* Caution: the write order is important here, set the status
2530          * with the "ownership" bits last. */
2531
2532         lp->tx_ring[entry].length = cpu_to_le16(-skb->len);
2533
2534         lp->tx_ring[entry].misc = 0x00000000;
2535
2536         lp->tx_skbuff[entry] = skb;
2537         lp->tx_dma_addr[entry] =
2538             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
2539         lp->tx_ring[entry].base = cpu_to_le32(lp->tx_dma_addr[entry]);
2540         wmb();                  /* Make sure owner changes after all others are visible */
2541         lp->tx_ring[entry].status = cpu_to_le16(status);
2542
2543         lp->cur_tx++;
2544         lp->stats.tx_bytes += skb->len;
2545
2546         /* Trigger an immediate send poll. */
2547         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_TXPOLL);
2548
2549         dev->trans_start = jiffies;
2550
2551         if (lp->tx_ring[(entry + 1) & lp->tx_mod_mask].base != 0) {
2552                 lp->tx_full = 1;
2553                 netif_stop_queue(dev);
2554         }
2555         spin_unlock_irqrestore(&lp->lock, flags);
2556         return 0;
2557 }
2558
2559 /* The PCNET32 interrupt handler. */
2560 static irqreturn_t
2561 pcnet32_interrupt(int irq, void *dev_id)
2562 {
2563         struct net_device *dev = dev_id;
2564         struct pcnet32_private *lp;
2565         unsigned long ioaddr;
2566         u16 csr0;
2567         int boguscnt = max_interrupt_work;
2568
2569         ioaddr = dev->base_addr;
2570         lp = netdev_priv(dev);
2571
2572         spin_lock(&lp->lock);
2573
2574         csr0 = lp->a.read_csr(ioaddr, CSR0);
2575         while ((csr0 & 0x8f00) && --boguscnt >= 0) {
2576                 if (csr0 == 0xffff) {
2577                         break;  /* PCMCIA remove happened */
2578                 }
2579                 /* Acknowledge all of the current interrupt sources ASAP. */
2580                 lp->a.write_csr(ioaddr, CSR0, csr0 & ~0x004f);
2581
2582                 if (netif_msg_intr(lp))
2583                         printk(KERN_DEBUG
2584                                "%s: interrupt  csr0=%#2.2x new csr=%#2.2x.\n",
2585                                dev->name, csr0, lp->a.read_csr(ioaddr, CSR0));
2586
2587                 /* Log misc errors. */
2588                 if (csr0 & 0x4000)
2589                         lp->stats.tx_errors++;  /* Tx babble. */
2590                 if (csr0 & 0x1000) {
2591                         /*
2592                          * This happens when our receive ring is full. This
2593                          * shouldn't be a problem as we will see normal rx
2594                          * interrupts for the frames in the receive ring.  But
2595                          * there are some PCI chipsets (I can reproduce this
2596                          * on SP3G with Intel saturn chipset) which have
2597                          * sometimes problems and will fill up the receive
2598                          * ring with error descriptors.  In this situation we
2599                          * don't get a rx interrupt, but a missed frame
2600                          * interrupt sooner or later.
2601                          */
2602                         lp->stats.rx_errors++;  /* Missed a Rx frame. */
2603                 }
2604                 if (csr0 & 0x0800) {
2605                         if (netif_msg_drv(lp))
2606                                 printk(KERN_ERR
2607                                        "%s: Bus master arbitration failure, status %4.4x.\n",
2608                                        dev->name, csr0);
2609                         /* unlike for the lance, there is no restart needed */
2610                 }
2611 #ifdef CONFIG_PCNET32_NAPI
2612                 if (netif_rx_schedule_prep(dev, &lp->napi)) {
2613                         u16 val;
2614                         /* set interrupt masks */
2615                         val = lp->a.read_csr(ioaddr, CSR3);
2616                         val |= 0x5f00;
2617                         lp->a.write_csr(ioaddr, CSR3, val);
2618                         mmiowb();
2619                         __netif_rx_schedule(dev, &lp->napi);
2620                         break;
2621                 }
2622 #else
2623                 pcnet32_rx(dev, lp->napi.weight);
2624                 if (pcnet32_tx(dev)) {
2625                         /* reset the chip to clear the error condition, then restart */
2626                         lp->a.reset(ioaddr);
2627                         lp->a.write_csr(ioaddr, CSR4, 0x0915); /* auto tx pad */
2628                         pcnet32_restart(dev, CSR0_START);
2629                         netif_wake_queue(dev);
2630                 }
2631 #endif
2632                 csr0 = lp->a.read_csr(ioaddr, CSR0);
2633         }
2634
2635 #ifndef CONFIG_PCNET32_NAPI
2636         /* Set interrupt enable. */
2637         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
2638 #endif
2639
2640         if (netif_msg_intr(lp))
2641                 printk(KERN_DEBUG "%s: exiting interrupt, csr0=%#4.4x.\n",
2642                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2643
2644         spin_unlock(&lp->lock);
2645
2646         return IRQ_HANDLED;
2647 }
2648
2649 static int pcnet32_close(struct net_device *dev)
2650 {
2651         unsigned long ioaddr = dev->base_addr;
2652         struct pcnet32_private *lp = netdev_priv(dev);
2653         unsigned long flags;
2654
2655         del_timer_sync(&lp->watchdog_timer);
2656
2657         netif_stop_queue(dev);
2658 #ifdef CONFIG_PCNET32_NAPI
2659         napi_disable(&lp->napi);
2660 #endif
2661
2662         spin_lock_irqsave(&lp->lock, flags);
2663
2664         lp->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2665
2666         if (netif_msg_ifdown(lp))
2667                 printk(KERN_DEBUG
2668                        "%s: Shutting down ethercard, status was %2.2x.\n",
2669                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2670
2671         /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
2672         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2673
2674         /*
2675          * Switch back to 16bit mode to avoid problems with dumb
2676          * DOS packet driver after a warm reboot
2677          */
2678         lp->a.write_bcr(ioaddr, 20, 4);
2679
2680         spin_unlock_irqrestore(&lp->lock, flags);
2681
2682         free_irq(dev->irq, dev);
2683
2684         spin_lock_irqsave(&lp->lock, flags);
2685
2686         pcnet32_purge_rx_ring(dev);
2687         pcnet32_purge_tx_ring(dev);
2688
2689         spin_unlock_irqrestore(&lp->lock, flags);
2690
2691         return 0;
2692 }
2693
2694 static struct net_device_stats *pcnet32_get_stats(struct net_device *dev)
2695 {
2696         struct pcnet32_private *lp = netdev_priv(dev);
2697         unsigned long ioaddr = dev->base_addr;
2698         unsigned long flags;
2699
2700         spin_lock_irqsave(&lp->lock, flags);
2701         lp->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2702         spin_unlock_irqrestore(&lp->lock, flags);
2703
2704         return &lp->stats;
2705 }
2706
2707 /* taken from the sunlance driver, which it took from the depca driver */
2708 static void pcnet32_load_multicast(struct net_device *dev)
2709 {
2710         struct pcnet32_private *lp = netdev_priv(dev);
2711         volatile struct pcnet32_init_block *ib = lp->init_block;
2712         volatile __le16 *mcast_table = (__le16 *)ib->filter;
2713         struct dev_mc_list *dmi = dev->mc_list;
2714         unsigned long ioaddr = dev->base_addr;
2715         char *addrs;
2716         int i;
2717         u32 crc;
2718
2719         /* set all multicast bits */
2720         if (dev->flags & IFF_ALLMULTI) {
2721                 ib->filter[0] = cpu_to_le32(~0U);
2722                 ib->filter[1] = cpu_to_le32(~0U);
2723                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER, 0xffff);
2724                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+1, 0xffff);
2725                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+2, 0xffff);
2726                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+3, 0xffff);
2727                 return;
2728         }
2729         /* clear the multicast filter */
2730         ib->filter[0] = 0;
2731         ib->filter[1] = 0;
2732
2733         /* Add addresses */
2734         for (i = 0; i < dev->mc_count; i++) {
2735                 addrs = dmi->dmi_addr;
2736                 dmi = dmi->next;
2737
2738                 /* multicast address? */
2739                 if (!(*addrs & 1))
2740                         continue;
2741
2742                 crc = ether_crc_le(6, addrs);
2743                 crc = crc >> 26;
2744                 mcast_table[crc >> 4] |= cpu_to_le16(1 << (crc & 0xf));
2745         }
2746         for (i = 0; i < 4; i++)
2747                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER + i,
2748                                 le16_to_cpu(mcast_table[i]));
2749         return;
2750 }
2751
2752 /*
2753  * Set or clear the multicast filter for this adaptor.
2754  */
2755 static void pcnet32_set_multicast_list(struct net_device *dev)
2756 {
2757         unsigned long ioaddr = dev->base_addr, flags;
2758         struct pcnet32_private *lp = netdev_priv(dev);
2759         int csr15, suspended;
2760
2761         spin_lock_irqsave(&lp->lock, flags);
2762         suspended = pcnet32_suspend(dev, &flags, 0);
2763         csr15 = lp->a.read_csr(ioaddr, CSR15);
2764         if (dev->flags & IFF_PROMISC) {
2765                 /* Log any net taps. */
2766                 if (netif_msg_hw(lp))
2767                         printk(KERN_INFO "%s: Promiscuous mode enabled.\n",
2768                                dev->name);
2769                 lp->init_block->mode =
2770                     cpu_to_le16(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) <<
2771                                 7);
2772                 lp->a.write_csr(ioaddr, CSR15, csr15 | 0x8000);
2773         } else {
2774                 lp->init_block->mode =
2775                     cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2776                 lp->a.write_csr(ioaddr, CSR15, csr15 & 0x7fff);
2777                 pcnet32_load_multicast(dev);
2778         }
2779
2780         if (suspended) {
2781                 int csr5;
2782                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
2783                 csr5 = lp->a.read_csr(ioaddr, CSR5);
2784                 lp->a.write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
2785         } else {
2786                 lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2787                 pcnet32_restart(dev, CSR0_NORMAL);
2788                 netif_wake_queue(dev);
2789         }
2790
2791         spin_unlock_irqrestore(&lp->lock, flags);
2792 }
2793
2794 /* This routine assumes that the lp->lock is held */
2795 static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
2796 {
2797         struct pcnet32_private *lp = netdev_priv(dev);
2798         unsigned long ioaddr = dev->base_addr;
2799         u16 val_out;
2800
2801         if (!lp->mii)
2802                 return 0;
2803
2804         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2805         val_out = lp->a.read_bcr(ioaddr, 34);
2806
2807         return val_out;
2808 }
2809
2810 /* This routine assumes that the lp->lock is held */
2811 static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
2812 {
2813         struct pcnet32_private *lp = netdev_priv(dev);
2814         unsigned long ioaddr = dev->base_addr;
2815
2816         if (!lp->mii)
2817                 return;
2818
2819         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2820         lp->a.write_bcr(ioaddr, 34, val);
2821 }
2822
2823 static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2824 {
2825         struct pcnet32_private *lp = netdev_priv(dev);
2826         int rc;
2827         unsigned long flags;
2828
2829         /* SIOC[GS]MIIxxx ioctls */
2830         if (lp->mii) {
2831                 spin_lock_irqsave(&lp->lock, flags);
2832                 rc = generic_mii_ioctl(&lp->mii_if, if_mii(rq), cmd, NULL);
2833                 spin_unlock_irqrestore(&lp->lock, flags);
2834         } else {
2835                 rc = -EOPNOTSUPP;
2836         }
2837
2838         return rc;
2839 }
2840
2841 static int pcnet32_check_otherphy(struct net_device *dev)
2842 {
2843         struct pcnet32_private *lp = netdev_priv(dev);
2844         struct mii_if_info mii = lp->mii_if;
2845         u16 bmcr;
2846         int i;
2847
2848         for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2849                 if (i == lp->mii_if.phy_id)
2850                         continue;       /* skip active phy */
2851                 if (lp->phymask & (1 << i)) {
2852                         mii.phy_id = i;
2853                         if (mii_link_ok(&mii)) {
2854                                 /* found PHY with active link */
2855                                 if (netif_msg_link(lp))
2856                                         printk(KERN_INFO
2857                                                "%s: Using PHY number %d.\n",
2858                                                dev->name, i);
2859
2860                                 /* isolate inactive phy */
2861                                 bmcr =
2862                                     mdio_read(dev, lp->mii_if.phy_id, MII_BMCR);
2863                                 mdio_write(dev, lp->mii_if.phy_id, MII_BMCR,
2864                                            bmcr | BMCR_ISOLATE);
2865
2866                                 /* de-isolate new phy */
2867                                 bmcr = mdio_read(dev, i, MII_BMCR);
2868                                 mdio_write(dev, i, MII_BMCR,
2869                                            bmcr & ~BMCR_ISOLATE);
2870
2871                                 /* set new phy address */
2872                                 lp->mii_if.phy_id = i;
2873                                 return 1;
2874                         }
2875                 }
2876         }
2877         return 0;
2878 }
2879
2880 /*
2881  * Show the status of the media.  Similar to mii_check_media however it
2882  * correctly shows the link speed for all (tested) pcnet32 variants.
2883  * Devices with no mii just report link state without speed.
2884  *
2885  * Caller is assumed to hold and release the lp->lock.
2886  */
2887
2888 static void pcnet32_check_media(struct net_device *dev, int verbose)
2889 {
2890         struct pcnet32_private *lp = netdev_priv(dev);
2891         int curr_link;
2892         int prev_link = netif_carrier_ok(dev) ? 1 : 0;
2893         u32 bcr9;
2894
2895         if (lp->mii) {
2896                 curr_link = mii_link_ok(&lp->mii_if);
2897         } else {
2898                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
2899                 curr_link = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
2900         }
2901         if (!curr_link) {
2902                 if (prev_link || verbose) {
2903                         netif_carrier_off(dev);
2904                         if (netif_msg_link(lp))
2905                                 printk(KERN_INFO "%s: link down\n", dev->name);
2906                 }
2907                 if (lp->phycount > 1) {
2908                         curr_link = pcnet32_check_otherphy(dev);
2909                         prev_link = 0;
2910                 }
2911         } else if (verbose || !prev_link) {
2912                 netif_carrier_on(dev);
2913                 if (lp->mii) {
2914                         if (netif_msg_link(lp)) {
2915                                 struct ethtool_cmd ecmd;
2916                                 mii_ethtool_gset(&lp->mii_if, &ecmd);
2917                                 printk(KERN_INFO
2918                                        "%s: link up, %sMbps, %s-duplex\n",
2919                                        dev->name,
2920                                        (ecmd.speed == SPEED_100) ? "100" : "10",
2921                                        (ecmd.duplex ==
2922                                         DUPLEX_FULL) ? "full" : "half");
2923                         }
2924                         bcr9 = lp->a.read_bcr(dev->base_addr, 9);
2925                         if ((bcr9 & (1 << 0)) != lp->mii_if.full_duplex) {
2926                                 if (lp->mii_if.full_duplex)
2927                                         bcr9 |= (1 << 0);
2928                                 else
2929                                         bcr9 &= ~(1 << 0);
2930                                 lp->a.write_bcr(dev->base_addr, 9, bcr9);
2931                         }
2932                 } else {
2933                         if (netif_msg_link(lp))
2934                                 printk(KERN_INFO "%s: link up\n", dev->name);
2935                 }
2936         }
2937 }
2938
2939 /*
2940  * Check for loss of link and link establishment.
2941  * Can not use mii_check_media because it does nothing if mode is forced.
2942  */
2943
2944 static void pcnet32_watchdog(struct net_device *dev)
2945 {
2946         struct pcnet32_private *lp = netdev_priv(dev);
2947         unsigned long flags;
2948
2949         /* Print the link status if it has changed */
2950         spin_lock_irqsave(&lp->lock, flags);
2951         pcnet32_check_media(dev, 0);
2952         spin_unlock_irqrestore(&lp->lock, flags);
2953
2954         mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
2955 }
2956
2957 static int pcnet32_pm_suspend(struct pci_dev *pdev, pm_message_t state)
2958 {
2959         struct net_device *dev = pci_get_drvdata(pdev);
2960
2961         if (netif_running(dev)) {
2962                 netif_device_detach(dev);
2963                 pcnet32_close(dev);
2964         }
2965         pci_save_state(pdev);
2966         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2967         return 0;
2968 }
2969
2970 static int pcnet32_pm_resume(struct pci_dev *pdev)
2971 {
2972         struct net_device *dev = pci_get_drvdata(pdev);
2973
2974         pci_set_power_state(pdev, PCI_D0);
2975         pci_restore_state(pdev);
2976
2977         if (netif_running(dev)) {
2978                 pcnet32_open(dev);
2979                 netif_device_attach(dev);
2980         }
2981         return 0;
2982 }
2983
2984 static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
2985 {
2986         struct net_device *dev = pci_get_drvdata(pdev);
2987
2988         if (dev) {
2989                 struct pcnet32_private *lp = netdev_priv(dev);
2990
2991                 unregister_netdev(dev);
2992                 pcnet32_free_ring(dev);
2993                 release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
2994                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2995                                     lp->init_block, lp->init_dma_addr);
2996                 free_netdev(dev);
2997                 pci_disable_device(pdev);
2998                 pci_set_drvdata(pdev, NULL);
2999         }
3000 }
3001
3002 static struct pci_driver pcnet32_driver = {
3003         .name = DRV_NAME,
3004         .probe = pcnet32_probe_pci,
3005         .remove = __devexit_p(pcnet32_remove_one),
3006         .id_table = pcnet32_pci_tbl,
3007         .suspend = pcnet32_pm_suspend,
3008         .resume = pcnet32_pm_resume,
3009 };
3010
3011 /* An additional parameter that may be passed in... */
3012 static int debug = -1;
3013 static int tx_start_pt = -1;
3014 static int pcnet32_have_pci;
3015
3016 module_param(debug, int, 0);
3017 MODULE_PARM_DESC(debug, DRV_NAME " debug level");
3018 module_param(max_interrupt_work, int, 0);
3019 MODULE_PARM_DESC(max_interrupt_work,
3020                  DRV_NAME " maximum events handled per interrupt");
3021 module_param(rx_copybreak, int, 0);
3022 MODULE_PARM_DESC(rx_copybreak,
3023                  DRV_NAME " copy breakpoint for copy-only-tiny-frames");
3024 module_param(tx_start_pt, int, 0);
3025 MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
3026 module_param(pcnet32vlb, int, 0);
3027 MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support (0/1)");
3028 module_param_array(options, int, NULL, 0);
3029 MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
3030 module_param_array(full_duplex, int, NULL, 0);
3031 MODULE_PARM_DESC(full_duplex, DRV_NAME " full duplex setting(s) (1)");
3032 /* Module Parameter for HomePNA cards added by Patrick Simmons, 2004 */
3033 module_param_array(homepna, int, NULL, 0);
3034 MODULE_PARM_DESC(homepna,
3035                  DRV_NAME
3036                  " mode for 79C978 cards (1 for HomePNA, 0 for Ethernet, default Ethernet");
3037
3038 MODULE_AUTHOR("Thomas Bogendoerfer");
3039 MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
3040 MODULE_LICENSE("GPL");
3041
3042 #define PCNET32_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
3043
3044 static int __init pcnet32_init_module(void)
3045 {
3046         printk(KERN_INFO "%s", version);
3047
3048         pcnet32_debug = netif_msg_init(debug, PCNET32_MSG_DEFAULT);
3049
3050         if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
3051                 tx_start = tx_start_pt;
3052
3053         /* find the PCI devices */
3054         if (!pci_register_driver(&pcnet32_driver))
3055                 pcnet32_have_pci = 1;
3056
3057         /* should we find any remaining VLbus devices ? */
3058         if (pcnet32vlb)
3059                 pcnet32_probe_vlbus(pcnet32_portlist);
3060
3061         if (cards_found && (pcnet32_debug & NETIF_MSG_PROBE))
3062                 printk(KERN_INFO PFX "%d cards_found.\n", cards_found);
3063
3064         return (pcnet32_have_pci + cards_found) ? 0 : -ENODEV;
3065 }
3066
3067 static void __exit pcnet32_cleanup_module(void)
3068 {
3069         struct net_device *next_dev;
3070
3071         while (pcnet32_dev) {
3072                 struct pcnet32_private *lp = netdev_priv(pcnet32_dev);
3073                 next_dev = lp->next;
3074                 unregister_netdev(pcnet32_dev);
3075                 pcnet32_free_ring(pcnet32_dev);
3076                 release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
3077                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
3078                                     lp->init_block, lp->init_dma_addr);
3079                 free_netdev(pcnet32_dev);
3080                 pcnet32_dev = next_dev;
3081         }
3082
3083         if (pcnet32_have_pci)
3084                 pci_unregister_driver(&pcnet32_driver);
3085 }
3086
3087 module_init(pcnet32_init_module);
3088 module_exit(pcnet32_cleanup_module);
3089
3090 /*
3091  * Local variables:
3092  *  c-indent-level: 4
3093  *  tab-width: 8
3094  * End:
3095  */