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         char                    tx_full;
 286         char                    phycount;       /* number of phys found */
 287         int                     options;
 288         unsigned int            shared_irq:1,   /* shared irq possible */
 289                                 dxsuflo:1,   /* disable transmit stop on uflo */
 290                                 mii:1;          /* mii port available */
 291         struct net_device       *next;
 292         struct mii_if_info      mii_if;
 293         struct timer_list       watchdog_timer;
 294         struct timer_list       blink_timer;
 295         u32                     msg_enable;     /* debug message level */
 296
 297         /* each bit indicates an available PHY */
 298         u32                     phymask;
 299         unsigned short          chip_version;   /* which variant this is */
 300 };
 301
 302 static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
 303 static int pcnet32_probe1(unsigned long, int, struct pci_dev *);
 304 static int pcnet32_open(struct net_device *);
 305 static int pcnet32_init_ring(struct net_device *);
 306 static int pcnet32_start_xmit(struct sk_buff *, struct net_device *);
 307 static void pcnet32_tx_timeout(struct net_device *dev);
 308 static irqreturn_t pcnet32_interrupt(int, void *);
 309 static int pcnet32_close(struct net_device *);
 310 static struct net_device_stats *pcnet32_get_stats(struct net_device *);
 311 static void pcnet32_load_multicast(struct net_device *dev);
 312 static void pcnet32_set_multicast_list(struct net_device *);
 313 static int pcnet32_ioctl(struct net_device *, struct ifreq *, int);
 314 static void pcnet32_watchdog(struct net_device *);
 315 static int mdio_read(struct net_device *dev, int phy_id, int reg_num);
 316 static void mdio_write(struct net_device *dev, int phy_id, int reg_num,
 317                        int val);
 318 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits);
 319 static void pcnet32_ethtool_test(struct net_device *dev,
 320                                  struct ethtool_test *eth_test, u64 * data);
 321 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1);
 322 static int pcnet32_phys_id(struct net_device *dev, u32 data);
 323 static void pcnet32_led_blink_callback(struct net_device *dev);
 324 static int pcnet32_get_regs_len(struct net_device *dev);
 325 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 326                              void *ptr);
 327 static void pcnet32_purge_tx_ring(struct net_device *dev);
 328 static int pcnet32_alloc_ring(struct net_device *dev, char *name);
 329 static void pcnet32_free_ring(struct net_device *dev);
 330 static void pcnet32_check_media(struct net_device *dev, int verbose);
 331
 332 static u16 pcnet32_wio_read_csr(unsigned long addr, int index)
 333 {
 334         outw(index, addr + PCNET32_WIO_RAP);
 335         return inw(addr + PCNET32_WIO_RDP);
 336 }
 337
 338 static void pcnet32_wio_write_csr(unsigned long addr, int index, u16 val)
 339 {
 340         outw(index, addr + PCNET32_WIO_RAP);
 341         outw(val, addr + PCNET32_WIO_RDP);
 342 }
 343
 344 static u16 pcnet32_wio_read_bcr(unsigned long addr, int index)
 345 {
 346         outw(index, addr + PCNET32_WIO_RAP);
 347         return inw(addr + PCNET32_WIO_BDP);
 348 }
 349
 350 static void pcnet32_wio_write_bcr(unsigned long addr, int index, u16 val)
 351 {
 352         outw(index, addr + PCNET32_WIO_RAP);
 353         outw(val, addr + PCNET32_WIO_BDP);
 354 }
 355
 356 static u16 pcnet32_wio_read_rap(unsigned long addr)
 357 {
 358         return inw(addr + PCNET32_WIO_RAP);
 359 }
 360
 361 static void pcnet32_wio_write_rap(unsigned long addr, u16 val)
 362 {
 363         outw(val, addr + PCNET32_WIO_RAP);
 364 }
 365
 366 static void pcnet32_wio_reset(unsigned long addr)
 367 {
 368         inw(addr + PCNET32_WIO_RESET);
 369 }
 370
 371 static int pcnet32_wio_check(unsigned long addr)
 372 {
 373         outw(88, addr + PCNET32_WIO_RAP);
 374         return (inw(addr + PCNET32_WIO_RAP) == 88);
 375 }
 376
 377 static struct pcnet32_access pcnet32_wio = {
 378         .read_csr = pcnet32_wio_read_csr,
 379         .write_csr = pcnet32_wio_write_csr,
 380         .read_bcr = pcnet32_wio_read_bcr,
 381         .write_bcr = pcnet32_wio_write_bcr,
 382         .read_rap = pcnet32_wio_read_rap,
 383         .write_rap = pcnet32_wio_write_rap,
 384         .reset = pcnet32_wio_reset
 385 };
 386
 387 static u16 pcnet32_dwio_read_csr(unsigned long addr, int index)
 388 {
 389         outl(index, addr + PCNET32_DWIO_RAP);
 390         return (inl(addr + PCNET32_DWIO_RDP) & 0xffff);
 391 }
 392
 393 static void pcnet32_dwio_write_csr(unsigned long addr, int index, u16 val)
 394 {
 395         outl(index, addr + PCNET32_DWIO_RAP);
 396         outl(val, addr + PCNET32_DWIO_RDP);
 397 }
 398
 399 static u16 pcnet32_dwio_read_bcr(unsigned long addr, int index)
 400 {
 401         outl(index, addr + PCNET32_DWIO_RAP);
 402         return (inl(addr + PCNET32_DWIO_BDP) & 0xffff);
 403 }
 404
 405 static void pcnet32_dwio_write_bcr(unsigned long addr, int index, u16 val)
 406 {
 407         outl(index, addr + PCNET32_DWIO_RAP);
 408         outl(val, addr + PCNET32_DWIO_BDP);
 409 }
 410
 411 static u16 pcnet32_dwio_read_rap(unsigned long addr)
 412 {
 413         return (inl(addr + PCNET32_DWIO_RAP) & 0xffff);
 414 }
 415
 416 static void pcnet32_dwio_write_rap(unsigned long addr, u16 val)
 417 {
 418         outl(val, addr + PCNET32_DWIO_RAP);
 419 }
 420
 421 static void pcnet32_dwio_reset(unsigned long addr)
 422 {
 423         inl(addr + PCNET32_DWIO_RESET);
 424 }
 425
 426 static int pcnet32_dwio_check(unsigned long addr)
 427 {
 428         outl(88, addr + PCNET32_DWIO_RAP);
 429         return ((inl(addr + PCNET32_DWIO_RAP) & 0xffff) == 88);
 430 }
 431
 432 static struct pcnet32_access pcnet32_dwio = {
 433         .read_csr = pcnet32_dwio_read_csr,
 434         .write_csr = pcnet32_dwio_write_csr,
 435         .read_bcr = pcnet32_dwio_read_bcr,
 436         .write_bcr = pcnet32_dwio_write_bcr,
 437         .read_rap = pcnet32_dwio_read_rap,
 438         .write_rap = pcnet32_dwio_write_rap,
 439         .reset = pcnet32_dwio_reset
 440 };
 441
 442 static void pcnet32_netif_stop(struct net_device *dev)
 443 {
 444 #ifdef CONFIG_PCNET32_NAPI
 445         struct pcnet32_private *lp = netdev_priv(dev);
 446 #endif
 447         dev->trans_start = jiffies;
 448 #ifdef CONFIG_PCNET32_NAPI
 449         napi_disable(&lp->napi);
 450 #endif
 451         netif_tx_disable(dev);
 452 }
 453
 454 static void pcnet32_netif_start(struct net_device *dev)
 455 {
 456 #ifdef CONFIG_PCNET32_NAPI
 457         struct pcnet32_private *lp = netdev_priv(dev);
 458         ulong ioaddr = dev->base_addr;
 459         u16 val;
 460 #endif
 461         netif_wake_queue(dev);
 462 #ifdef CONFIG_PCNET32_NAPI
 463         val = lp->a.read_csr(ioaddr, CSR3);
 464         val &= 0x00ff;
 465         lp->a.write_csr(ioaddr, CSR3, val);
 466         napi_enable(&lp->napi);
 467 #endif
 468 }
 469
 470 /*
 471  * Allocate space for the new sized tx ring.
 472  * Free old resources
 473  * Save new resources.
 474  * Any failure keeps old resources.
 475  * Must be called with lp->lock held.
 476  */
 477 static void pcnet32_realloc_tx_ring(struct net_device *dev,
 478                                     struct pcnet32_private *lp,
 479                                     unsigned int size)
 480 {
 481         dma_addr_t new_ring_dma_addr;
 482         dma_addr_t *new_dma_addr_list;
 483         struct pcnet32_tx_head *new_tx_ring;
 484         struct sk_buff **new_skb_list;
 485
 486         pcnet32_purge_tx_ring(dev);
 487
 488         new_tx_ring = pci_alloc_consistent(lp->pci_dev,
 489                                            sizeof(struct pcnet32_tx_head) *
 490                                            (1 << size),
 491                                            &new_ring_dma_addr);
 492         if (new_tx_ring == NULL) {
 493                 if (netif_msg_drv(lp))
 494                         printk("\n" KERN_ERR
 495                                "%s: Consistent memory allocation failed.\n",
 496                                dev->name);
 497                 return;
 498         }
 499         memset(new_tx_ring, 0, sizeof(struct pcnet32_tx_head) * (1 << size));
 500
 501         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
 502                                 GFP_ATOMIC);
 503         if (!new_dma_addr_list) {
 504                 if (netif_msg_drv(lp))
 505                         printk("\n" KERN_ERR
 506                                "%s: Memory allocation failed.\n", dev->name);
 507                 goto free_new_tx_ring;
 508         }
 509
 510         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
 511                                 GFP_ATOMIC);
 512         if (!new_skb_list) {
 513                 if (netif_msg_drv(lp))
 514                         printk("\n" KERN_ERR
 515                                "%s: Memory allocation failed.\n", dev->name);
 516                 goto free_new_lists;
 517         }
 518
 519         kfree(lp->tx_skbuff);
 520         kfree(lp->tx_dma_addr);
 521         pci_free_consistent(lp->pci_dev,
 522                             sizeof(struct pcnet32_tx_head) *
 523                             lp->tx_ring_size, lp->tx_ring,
 524                             lp->tx_ring_dma_addr);
 525
 526         lp->tx_ring_size = (1 << size);
 527         lp->tx_mod_mask = lp->tx_ring_size - 1;
 528         lp->tx_len_bits = (size << 12);
 529         lp->tx_ring = new_tx_ring;
 530         lp->tx_ring_dma_addr = new_ring_dma_addr;
 531         lp->tx_dma_addr = new_dma_addr_list;
 532         lp->tx_skbuff = new_skb_list;
 533         return;
 534
 535     free_new_lists:
 536         kfree(new_dma_addr_list);
 537     free_new_tx_ring:
 538         pci_free_consistent(lp->pci_dev,
 539                             sizeof(struct pcnet32_tx_head) *
 540                             (1 << size),
 541                             new_tx_ring,
 542                             new_ring_dma_addr);
 543         return;
 544 }
 545
 546 /*
 547  * Allocate space for the new sized rx ring.
 548  * Re-use old receive buffers.
 549  *   alloc extra buffers
 550  *   free unneeded buffers
 551  *   free unneeded buffers
 552  * Save new resources.
 553  * Any failure keeps old resources.
 554  * Must be called with lp->lock held.
 555  */
 556 static void pcnet32_realloc_rx_ring(struct net_device *dev,
 557                                     struct pcnet32_private *lp,
 558                                     unsigned int size)
 559 {
 560         dma_addr_t new_ring_dma_addr;
 561         dma_addr_t *new_dma_addr_list;
 562         struct pcnet32_rx_head *new_rx_ring;
 563         struct sk_buff **new_skb_list;
 564         int new, overlap;
 565
 566         new_rx_ring = pci_alloc_consistent(lp->pci_dev,
 567                                            sizeof(struct pcnet32_rx_head) *
 568                                            (1 << size),
 569                                            &new_ring_dma_addr);
 570         if (new_rx_ring == NULL) {
 571                 if (netif_msg_drv(lp))
 572                         printk("\n" KERN_ERR
 573                                "%s: Consistent memory allocation failed.\n",
 574                                dev->name);
 575                 return;
 576         }
 577         memset(new_rx_ring, 0, sizeof(struct pcnet32_rx_head) * (1 << size));
 578
 579         new_dma_addr_list = kcalloc((1 << size), sizeof(dma_addr_t),
 580                                 GFP_ATOMIC);
 581         if (!new_dma_addr_list) {
 582                 if (netif_msg_drv(lp))
 583                         printk("\n" KERN_ERR
 584                                "%s: Memory allocation failed.\n", dev->name);
 585                 goto free_new_rx_ring;
 586         }
 587
 588         new_skb_list = kcalloc((1 << size), sizeof(struct sk_buff *),
 589                                 GFP_ATOMIC);
 590         if (!new_skb_list) {
 591                 if (netif_msg_drv(lp))
 592                         printk("\n" KERN_ERR
 593                                "%s: Memory allocation failed.\n", dev->name);
 594                 goto free_new_lists;
 595         }
 596
 597         /* first copy the current receive buffers */
 598         overlap = min(size, lp->rx_ring_size);
 599         for (new = 0; new < overlap; new++) {
 600                 new_rx_ring[new] = lp->rx_ring[new];
 601                 new_dma_addr_list[new] = lp->rx_dma_addr[new];
 602                 new_skb_list[new] = lp->rx_skbuff[new];
 603         }
 604         /* now allocate any new buffers needed */
 605         for (; new < size; new++ ) {
 606                 struct sk_buff *rx_skbuff;
 607                 new_skb_list[new] = dev_alloc_skb(PKT_BUF_SZ);
 608                 if (!(rx_skbuff = new_skb_list[new])) {
 609                         /* keep the original lists and buffers */
 610                         if (netif_msg_drv(lp))
 611                                 printk(KERN_ERR
 612                                        "%s: pcnet32_realloc_rx_ring dev_alloc_skb failed.\n",
 613                                        dev->name);
 614                         goto free_all_new;
 615                 }
 616                 skb_reserve(rx_skbuff, 2);
 617
 618                 new_dma_addr_list[new] =
 619                             pci_map_single(lp->pci_dev, rx_skbuff->data,
 620                                            PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 621                 new_rx_ring[new].base = cpu_to_le32(new_dma_addr_list[new]);
 622                 new_rx_ring[new].buf_length = cpu_to_le16(2 - PKT_BUF_SZ);
 623                 new_rx_ring[new].status = cpu_to_le16(0x8000);
 624         }
 625         /* and free any unneeded buffers */
 626         for (; new < lp->rx_ring_size; new++) {
 627                 if (lp->rx_skbuff[new]) {
 628                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[new],
 629                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 630                         dev_kfree_skb(lp->rx_skbuff[new]);
 631                 }
 632         }
 633
 634         kfree(lp->rx_skbuff);
 635         kfree(lp->rx_dma_addr);
 636         pci_free_consistent(lp->pci_dev,
 637                             sizeof(struct pcnet32_rx_head) *
 638                             lp->rx_ring_size, lp->rx_ring,
 639                             lp->rx_ring_dma_addr);
 640
 641         lp->rx_ring_size = (1 << size);
 642         lp->rx_mod_mask = lp->rx_ring_size - 1;
 643         lp->rx_len_bits = (size << 4);
 644         lp->rx_ring = new_rx_ring;
 645         lp->rx_ring_dma_addr = new_ring_dma_addr;
 646         lp->rx_dma_addr = new_dma_addr_list;
 647         lp->rx_skbuff = new_skb_list;
 648         return;
 649
 650     free_all_new:
 651         for (; --new >= lp->rx_ring_size; ) {
 652                 if (new_skb_list[new]) {
 653                         pci_unmap_single(lp->pci_dev, new_dma_addr_list[new],
 654                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 655                         dev_kfree_skb(new_skb_list[new]);
 656                 }
 657         }
 658         kfree(new_skb_list);
 659     free_new_lists:
 660         kfree(new_dma_addr_list);
 661     free_new_rx_ring:
 662         pci_free_consistent(lp->pci_dev,
 663                             sizeof(struct pcnet32_rx_head) *
 664                             (1 << size),
 665                             new_rx_ring,
 666                             new_ring_dma_addr);
 667         return;
 668 }
 669
 670 static void pcnet32_purge_rx_ring(struct net_device *dev)
 671 {
 672         struct pcnet32_private *lp = netdev_priv(dev);
 673         int i;
 674
 675         /* free all allocated skbuffs */
 676         for (i = 0; i < lp->rx_ring_size; i++) {
 677                 lp->rx_ring[i].status = 0;      /* CPU owns buffer */
 678                 wmb();          /* Make sure adapter sees owner change */
 679                 if (lp->rx_skbuff[i]) {
 680                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i],
 681                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
 682                         dev_kfree_skb_any(lp->rx_skbuff[i]);
 683                 }
 684                 lp->rx_skbuff[i] = NULL;
 685                 lp->rx_dma_addr[i] = 0;
 686         }
 687 }
 688
 689 #ifdef CONFIG_NET_POLL_CONTROLLER
 690 static void pcnet32_poll_controller(struct net_device *dev)
 691 {
 692         disable_irq(dev->irq);
 693         pcnet32_interrupt(0, dev);
 694         enable_irq(dev->irq);
 695 }
 696 #endif
 697
 698 static int pcnet32_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 699 {
 700         struct pcnet32_private *lp = netdev_priv(dev);
 701         unsigned long flags;
 702         int r = -EOPNOTSUPP;
 703
 704         if (lp->mii) {
 705                 spin_lock_irqsave(&lp->lock, flags);
 706                 mii_ethtool_gset(&lp->mii_if, cmd);
 707                 spin_unlock_irqrestore(&lp->lock, flags);
 708                 r = 0;
 709         }
 710         return r;
 711 }
 712
 713 static int pcnet32_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 714 {
 715         struct pcnet32_private *lp = netdev_priv(dev);
 716         unsigned long flags;
 717         int r = -EOPNOTSUPP;
 718
 719         if (lp->mii) {
 720                 spin_lock_irqsave(&lp->lock, flags);
 721                 r = mii_ethtool_sset(&lp->mii_if, cmd);
 722                 spin_unlock_irqrestore(&lp->lock, flags);
 723         }
 724         return r;
 725 }
 726
 727 static void pcnet32_get_drvinfo(struct net_device *dev,
 728                                 struct ethtool_drvinfo *info)
 729 {
 730         struct pcnet32_private *lp = netdev_priv(dev);
 731
 732         strcpy(info->driver, DRV_NAME);
 733         strcpy(info->version, DRV_VERSION);
 734         if (lp->pci_dev)
 735                 strcpy(info->bus_info, pci_name(lp->pci_dev));
 736         else
 737                 sprintf(info->bus_info, "VLB 0x%lx", dev->base_addr);
 738 }
 739
 740 static u32 pcnet32_get_link(struct net_device *dev)
 741 {
 742         struct pcnet32_private *lp = netdev_priv(dev);
 743         unsigned long flags;
 744         int r;
 745
 746         spin_lock_irqsave(&lp->lock, flags);
 747         if (lp->mii) {
 748                 r = mii_link_ok(&lp->mii_if);
 749         } else if (lp->chip_version >= PCNET32_79C970A) {
 750                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
 751                 r = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
 752         } else {        /* can not detect link on really old chips */
 753                 r = 1;
 754         }
 755         spin_unlock_irqrestore(&lp->lock, flags);
 756
 757         return r;
 758 }
 759
 760 static u32 pcnet32_get_msglevel(struct net_device *dev)
 761 {
 762         struct pcnet32_private *lp = netdev_priv(dev);
 763         return lp->msg_enable;
 764 }
 765
 766 static void pcnet32_set_msglevel(struct net_device *dev, u32 value)
 767 {
 768         struct pcnet32_private *lp = netdev_priv(dev);
 769         lp->msg_enable = value;
 770 }
 771
 772 static int pcnet32_nway_reset(struct net_device *dev)
 773 {
 774         struct pcnet32_private *lp = netdev_priv(dev);
 775         unsigned long flags;
 776         int r = -EOPNOTSUPP;
 777
 778         if (lp->mii) {
 779                 spin_lock_irqsave(&lp->lock, flags);
 780                 r = mii_nway_restart(&lp->mii_if);
 781                 spin_unlock_irqrestore(&lp->lock, flags);
 782         }
 783         return r;
 784 }
 785
 786 static void pcnet32_get_ringparam(struct net_device *dev,
 787                                   struct ethtool_ringparam *ering)
 788 {
 789         struct pcnet32_private *lp = netdev_priv(dev);
 790
 791         ering->tx_max_pending = TX_MAX_RING_SIZE;
 792         ering->tx_pending = lp->tx_ring_size;
 793         ering->rx_max_pending = RX_MAX_RING_SIZE;
 794         ering->rx_pending = lp->rx_ring_size;
 795 }
 796
 797 static int pcnet32_set_ringparam(struct net_device *dev,
 798                                  struct ethtool_ringparam *ering)
 799 {
 800         struct pcnet32_private *lp = netdev_priv(dev);
 801         unsigned long flags;
 802         unsigned int size;
 803         ulong ioaddr = dev->base_addr;
 804         int i;
 805
 806         if (ering->rx_mini_pending || ering->rx_jumbo_pending)
 807                 return -EINVAL;
 808
 809         if (netif_running(dev))
 810                 pcnet32_netif_stop(dev);
 811
 812         spin_lock_irqsave(&lp->lock, flags);
 813         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
 814
 815         size = min(ering->tx_pending, (unsigned int)TX_MAX_RING_SIZE);
 816
 817         /* set the minimum ring size to 4, to allow the loopback test to work
 818          * unchanged.
 819          */
 820         for (i = 2; i <= PCNET32_LOG_MAX_TX_BUFFERS; i++) {
 821                 if (size <= (1 << i))
 822                         break;
 823         }
 824         if ((1 << i) != lp->tx_ring_size)
 825                 pcnet32_realloc_tx_ring(dev, lp, i);
 826
 827         size = min(ering->rx_pending, (unsigned int)RX_MAX_RING_SIZE);
 828         for (i = 2; i <= PCNET32_LOG_MAX_RX_BUFFERS; i++) {
 829                 if (size <= (1 << i))
 830                         break;
 831         }
 832         if ((1 << i) != lp->rx_ring_size)
 833                 pcnet32_realloc_rx_ring(dev, lp, i);
 834
 835         lp->napi.weight = lp->rx_ring_size / 2;
 836
 837         if (netif_running(dev)) {
 838                 pcnet32_netif_start(dev);
 839                 pcnet32_restart(dev, CSR0_NORMAL);
 840         }
 841
 842         spin_unlock_irqrestore(&lp->lock, flags);
 843
 844         if (netif_msg_drv(lp))
 845                 printk(KERN_INFO
 846                        "%s: Ring Param Settings: RX: %d, TX: %d\n", dev->name,
 847                        lp->rx_ring_size, lp->tx_ring_size);
 848
 849         return 0;
 850 }
 851
 852 static void pcnet32_get_strings(struct net_device *dev, u32 stringset,
 853                                 u8 * data)
 854 {
 855         memcpy(data, pcnet32_gstrings_test, sizeof(pcnet32_gstrings_test));
 856 }
 857
 858 static int pcnet32_get_sset_count(struct net_device *dev, int sset)
 859 {
 860         switch (sset) {
 861         case ETH_SS_TEST:
 862                 return PCNET32_TEST_LEN;
 863         default:
 864                 return -EOPNOTSUPP;
 865         }
 866 }
 867
 868 static void pcnet32_ethtool_test(struct net_device *dev,
 869                                  struct ethtool_test *test, u64 * data)
 870 {
 871         struct pcnet32_private *lp = netdev_priv(dev);
 872         int rc;
 873
 874         if (test->flags == ETH_TEST_FL_OFFLINE) {
 875                 rc = pcnet32_loopback_test(dev, data);
 876                 if (rc) {
 877                         if (netif_msg_hw(lp))
 878                                 printk(KERN_DEBUG "%s: Loopback test failed.\n",
 879                                        dev->name);
 880                         test->flags |= ETH_TEST_FL_FAILED;
 881                 } else if (netif_msg_hw(lp))
 882                         printk(KERN_DEBUG "%s: Loopback test passed.\n",
 883                                dev->name);
 884         } else if (netif_msg_hw(lp))
 885                 printk(KERN_DEBUG
 886                        "%s: No tests to run (specify 'Offline' on ethtool).",
 887                        dev->name);
 888 }                               /* end pcnet32_ethtool_test */
 889
 890 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1)
 891 {
 892         struct pcnet32_private *lp = netdev_priv(dev);
 893         struct pcnet32_access *a = &lp->a;      /* access to registers */
 894         ulong ioaddr = dev->base_addr;  /* card base I/O address */
 895         struct sk_buff *skb;    /* sk buff */
 896         int x, i;               /* counters */
 897         int numbuffs = 4;       /* number of TX/RX buffers and descs */
 898         u16 status = 0x8300;    /* TX ring status */
 899         __le16 teststatus;      /* test of ring status */
 900         int rc;                 /* return code */
 901         int size;               /* size of packets */
 902         unsigned char *packet;  /* source packet data */
 903         static const int data_len = 60; /* length of source packets */
 904         unsigned long flags;
 905         unsigned long ticks;
 906
 907         rc = 1;                 /* default to fail */
 908
 909         if (netif_running(dev))
 910 #ifdef CONFIG_PCNET32_NAPI
 911                 pcnet32_netif_stop(dev);
 912 #else
 913                 pcnet32_close(dev);
 914 #endif
 915
 916         spin_lock_irqsave(&lp->lock, flags);
 917         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* stop the chip */
 918
 919         numbuffs = min(numbuffs, (int)min(lp->rx_ring_size, lp->tx_ring_size));
 920
 921         /* Reset the PCNET32 */
 922         lp->a.reset(ioaddr);
 923         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
 924
 925         /* switch pcnet32 to 32bit mode */
 926         lp->a.write_bcr(ioaddr, 20, 2);
 927
 928         /* purge & init rings but don't actually restart */
 929         pcnet32_restart(dev, 0x0000);
 930
 931         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
 932
 933         /* Initialize Transmit buffers. */
 934         size = data_len + 15;
 935         for (x = 0; x < numbuffs; x++) {
 936                 if (!(skb = dev_alloc_skb(size))) {
 937                         if (netif_msg_hw(lp))
 938                                 printk(KERN_DEBUG
 939                                        "%s: Cannot allocate skb at line: %d!\n",
 940                                        dev->name, __LINE__);
 941                         goto clean_up;
 942                 } else {
 943                         packet = skb->data;
 944                         skb_put(skb, size);     /* create space for data */
 945                         lp->tx_skbuff[x] = skb;
 946                         lp->tx_ring[x].length = cpu_to_le16(-skb->len);
 947                         lp->tx_ring[x].misc = 0;
 948
 949                         /* put DA and SA into the skb */
 950                         for (i = 0; i < 6; i++)
 951                                 *packet++ = dev->dev_addr[i];
 952                         for (i = 0; i < 6; i++)
 953                                 *packet++ = dev->dev_addr[i];
 954                         /* type */
 955                         *packet++ = 0x08;
 956                         *packet++ = 0x06;
 957                         /* packet number */
 958                         *packet++ = x;
 959                         /* fill packet with data */
 960                         for (i = 0; i < data_len; i++)
 961                                 *packet++ = i;
 962
 963                         lp->tx_dma_addr[x] =
 964                             pci_map_single(lp->pci_dev, skb->data, skb->len,
 965                                            PCI_DMA_TODEVICE);
 966                         lp->tx_ring[x].base = cpu_to_le32(lp->tx_dma_addr[x]);
 967                         wmb();  /* Make sure owner changes after all others are visible */
 968                         lp->tx_ring[x].status = cpu_to_le16(status);
 969                 }
 970         }
 971
 972         x = a->read_bcr(ioaddr, 32);    /* set internal loopback in BCR32 */
 973         a->write_bcr(ioaddr, 32, x | 0x0002);
 974
 975         /* set int loopback in CSR15 */
 976         x = a->read_csr(ioaddr, CSR15) & 0xfffc;
 977         lp->a.write_csr(ioaddr, CSR15, x | 0x0044);
 978
 979         teststatus = cpu_to_le16(0x8000);
 980         lp->a.write_csr(ioaddr, CSR0, CSR0_START);      /* Set STRT bit */
 981
 982         /* Check status of descriptors */
 983         for (x = 0; x < numbuffs; x++) {
 984                 ticks = 0;
 985                 rmb();
 986                 while ((lp->rx_ring[x].status & teststatus) && (ticks < 200)) {
 987                         spin_unlock_irqrestore(&lp->lock, flags);
 988                         msleep(1);
 989                         spin_lock_irqsave(&lp->lock, flags);
 990                         rmb();
 991                         ticks++;
 992                 }
 993                 if (ticks == 200) {
 994                         if (netif_msg_hw(lp))
 995                                 printk("%s: Desc %d failed to reset!\n",
 996                                        dev->name, x);
 997                         break;
 998                 }
 999         }
1000
1001         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);       /* Set STOP bit */
1002         wmb();
1003         if (netif_msg_hw(lp) && netif_msg_pktdata(lp)) {
1004                 printk(KERN_DEBUG "%s: RX loopback packets:\n", dev->name);
1005
1006                 for (x = 0; x < numbuffs; x++) {
1007                         printk(KERN_DEBUG "%s: Packet %d:\n", dev->name, x);
1008                         skb = lp->rx_skbuff[x];
1009                         for (i = 0; i < size; i++) {
1010                                 printk("%02x ", *(skb->data + i));
1011                         }
1012                         printk("\n");
1013                 }
1014         }
1015
1016         x = 0;
1017         rc = 0;
1018         while (x < numbuffs && !rc) {
1019                 skb = lp->rx_skbuff[x];
1020                 packet = lp->tx_skbuff[x]->data;
1021                 for (i = 0; i < size; i++) {
1022                         if (*(skb->data + i) != packet[i]) {
1023                                 if (netif_msg_hw(lp))
1024                                         printk(KERN_DEBUG
1025                                                "%s: Error in compare! %2x - %02x %02x\n",
1026                                                dev->name, i, *(skb->data + i),
1027                                                packet[i]);
1028                                 rc = 1;
1029                                 break;
1030                         }
1031                 }
1032                 x++;
1033         }
1034
1035       clean_up:
1036         *data1 = rc;
1037         pcnet32_purge_tx_ring(dev);
1038
1039         x = a->read_csr(ioaddr, CSR15);
1040         a->write_csr(ioaddr, CSR15, (x & ~0x0044));     /* reset bits 6 and 2 */
1041
1042         x = a->read_bcr(ioaddr, 32);    /* reset internal loopback */
1043         a->write_bcr(ioaddr, 32, (x & ~0x0002));
1044
1045 #ifdef CONFIG_PCNET32_NAPI
1046         if (netif_running(dev)) {
1047                 pcnet32_netif_start(dev);
1048                 pcnet32_restart(dev, CSR0_NORMAL);
1049         } else {
1050                 pcnet32_purge_rx_ring(dev);
1051                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1052         }
1053         spin_unlock_irqrestore(&lp->lock, flags);
1054 #else
1055         if (netif_running(dev)) {
1056                 spin_unlock_irqrestore(&lp->lock, flags);
1057                 pcnet32_open(dev);
1058         } else {
1059                 pcnet32_purge_rx_ring(dev);
1060                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
1061                 spin_unlock_irqrestore(&lp->lock, flags);
1062         }
1063 #endif
1064
1065         return (rc);
1066 }                               /* end pcnet32_loopback_test  */
1067
1068 static void pcnet32_led_blink_callback(struct net_device *dev)
1069 {
1070         struct pcnet32_private *lp = netdev_priv(dev);
1071         struct pcnet32_access *a = &lp->a;
1072         ulong ioaddr = dev->base_addr;
1073         unsigned long flags;
1074         int i;
1075
1076         spin_lock_irqsave(&lp->lock, flags);
1077         for (i = 4; i < 8; i++) {
1078                 a->write_bcr(ioaddr, i, a->read_bcr(ioaddr, i) ^ 0x4000);
1079         }
1080         spin_unlock_irqrestore(&lp->lock, flags);
1081
1082         mod_timer(&lp->blink_timer, PCNET32_BLINK_TIMEOUT);
1083 }
1084
1085 static int pcnet32_phys_id(struct net_device *dev, u32 data)
1086 {
1087         struct pcnet32_private *lp = netdev_priv(dev);
1088         struct pcnet32_access *a = &lp->a;
1089         ulong ioaddr = dev->base_addr;
1090         unsigned long flags;
1091         int i, regs[4];
1092
1093         if (!lp->blink_timer.function) {
1094                 init_timer(&lp->blink_timer);
1095                 lp->blink_timer.function = (void *)pcnet32_led_blink_callback;
1096                 lp->blink_timer.data = (unsigned long)dev;
1097         }
1098
1099         /* Save the current value of the bcrs */
1100         spin_lock_irqsave(&lp->lock, flags);
1101         for (i = 4; i < 8; i++) {
1102                 regs[i - 4] = a->read_bcr(ioaddr, i);
1103         }
1104         spin_unlock_irqrestore(&lp->lock, flags);
1105
1106         mod_timer(&lp->blink_timer, jiffies);
1107         set_current_state(TASK_INTERRUPTIBLE);
1108
1109         /* AV: the limit here makes no sense whatsoever */
1110         if ((!data) || (data > (u32) (MAX_SCHEDULE_TIMEOUT / HZ)))
1111                 data = (u32) (MAX_SCHEDULE_TIMEOUT / HZ);
1112
1113         msleep_interruptible(data * 1000);
1114         del_timer_sync(&lp->blink_timer);
1115
1116         /* Restore the original value of the bcrs */
1117         spin_lock_irqsave(&lp->lock, flags);
1118         for (i = 4; i < 8; i++) {
1119                 a->write_bcr(ioaddr, i, regs[i - 4]);
1120         }
1121         spin_unlock_irqrestore(&lp->lock, flags);
1122
1123         return 0;
1124 }
1125
1126 /*
1127  * lp->lock must be held.
1128  */
1129 static int pcnet32_suspend(struct net_device *dev, unsigned long *flags,
1130                 int can_sleep)
1131 {
1132         int csr5;
1133         struct pcnet32_private *lp = netdev_priv(dev);
1134         struct pcnet32_access *a = &lp->a;
1135         ulong ioaddr = dev->base_addr;
1136         int ticks;
1137
1138         /* really old chips have to be stopped. */
1139         if (lp->chip_version < PCNET32_79C970A)
1140                 return 0;
1141
1142         /* set SUSPEND (SPND) - CSR5 bit 0 */
1143         csr5 = a->read_csr(ioaddr, CSR5);
1144         a->write_csr(ioaddr, CSR5, csr5 | CSR5_SUSPEND);
1145
1146         /* poll waiting for bit to be set */
1147         ticks = 0;
1148         while (!(a->read_csr(ioaddr, CSR5) & CSR5_SUSPEND)) {
1149                 spin_unlock_irqrestore(&lp->lock, *flags);
1150                 if (can_sleep)
1151                         msleep(1);
1152                 else
1153                         mdelay(1);
1154                 spin_lock_irqsave(&lp->lock, *flags);
1155                 ticks++;
1156                 if (ticks > 200) {
1157                         if (netif_msg_hw(lp))
1158                                 printk(KERN_DEBUG
1159                                        "%s: Error getting into suspend!\n",
1160                                        dev->name);
1161                         return 0;
1162                 }
1163         }
1164         return 1;
1165 }
1166
1167 /*
1168  * process one receive descriptor entry
1169  */
1170
1171 static void pcnet32_rx_entry(struct net_device *dev,
1172                              struct pcnet32_private *lp,
1173                              struct pcnet32_rx_head *rxp,
1174                              int entry)
1175 {
1176         int status = (short)le16_to_cpu(rxp->status) >> 8;
1177         int rx_in_place = 0;
1178         struct sk_buff *skb;
1179         short pkt_len;
1180
1181         if (status != 0x03) {   /* There was an error. */
1182                 /*
1183                  * There is a tricky error noted by John Murphy,
1184                  * <murf@perftech.com> to Russ Nelson: Even with full-sized
1185                  * buffers it's possible for a jabber packet to use two
1186                  * buffers, with only the last correctly noting the error.
1187                  */
1188                 if (status & 0x01)      /* Only count a general error at the */
1189                         dev->stats.rx_errors++; /* end of a packet. */
1190                 if (status & 0x20)
1191                         dev->stats.rx_frame_errors++;
1192                 if (status & 0x10)
1193                         dev->stats.rx_over_errors++;
1194                 if (status & 0x08)
1195                         dev->stats.rx_crc_errors++;
1196                 if (status & 0x04)
1197                         dev->stats.rx_fifo_errors++;
1198                 return;
1199         }
1200
1201         pkt_len = (le32_to_cpu(rxp->msg_length) & 0xfff) - 4;
1202
1203         /* Discard oversize frames. */
1204         if (unlikely(pkt_len > PKT_BUF_SZ - 2)) {
1205                 if (netif_msg_drv(lp))
1206                         printk(KERN_ERR "%s: Impossible packet size %d!\n",
1207                                dev->name, pkt_len);
1208                 dev->stats.rx_errors++;
1209                 return;
1210         }
1211         if (pkt_len < 60) {
1212                 if (netif_msg_rx_err(lp))
1213                         printk(KERN_ERR "%s: Runt packet!\n", dev->name);
1214                 dev->stats.rx_errors++;
1215                 return;
1216         }
1217
1218         if (pkt_len > rx_copybreak) {
1219                 struct sk_buff *newskb;
1220
1221                 if ((newskb = dev_alloc_skb(PKT_BUF_SZ))) {
1222                         skb_reserve(newskb, 2);
1223                         skb = lp->rx_skbuff[entry];
1224                         pci_unmap_single(lp->pci_dev,
1225                                          lp->rx_dma_addr[entry],
1226                                          PKT_BUF_SZ - 2,
1227                                          PCI_DMA_FROMDEVICE);
1228                         skb_put(skb, pkt_len);
1229                         lp->rx_skbuff[entry] = newskb;
1230                         lp->rx_dma_addr[entry] =
1231                                             pci_map_single(lp->pci_dev,
1232                                                            newskb->data,
1233                                                            PKT_BUF_SZ - 2,
1234                                                            PCI_DMA_FROMDEVICE);
1235                         rxp->base = cpu_to_le32(lp->rx_dma_addr[entry]);
1236                         rx_in_place = 1;
1237                 } else
1238                         skb = NULL;
1239         } else {
1240                 skb = dev_alloc_skb(pkt_len + 2);
1241         }
1242
1243         if (skb == NULL) {
1244                 if (netif_msg_drv(lp))
1245                         printk(KERN_ERR
1246                                "%s: Memory squeeze, dropping packet.\n",
1247                                dev->name);
1248                 dev->stats.rx_dropped++;
1249                 return;
1250         }
1251         skb->dev = dev;
1252         if (!rx_in_place) {
1253                 skb_reserve(skb, 2);    /* 16 byte align */
1254                 skb_put(skb, pkt_len);  /* Make room */
1255                 pci_dma_sync_single_for_cpu(lp->pci_dev,
1256                                             lp->rx_dma_addr[entry],
1257                                             pkt_len,
1258                                             PCI_DMA_FROMDEVICE);
1259                 skb_copy_to_linear_data(skb,
1260                                  (unsigned char *)(lp->rx_skbuff[entry]->data),
1261                                  pkt_len);
1262                 pci_dma_sync_single_for_device(lp->pci_dev,
1263                                                lp->rx_dma_addr[entry],
1264                                                pkt_len,
1265                                                PCI_DMA_FROMDEVICE);
1266         }
1267         dev->stats.rx_bytes += skb->len;
1268         skb->protocol = eth_type_trans(skb, dev);
1269 #ifdef CONFIG_PCNET32_NAPI
1270         netif_receive_skb(skb);
1271 #else
1272         netif_rx(skb);
1273 #endif
1274         dev->last_rx = jiffies;
1275         dev->stats.rx_packets++;
1276         return;
1277 }
1278
1279 static int pcnet32_rx(struct net_device *dev, int budget)
1280 {
1281         struct pcnet32_private *lp = netdev_priv(dev);
1282         int entry = lp->cur_rx & lp->rx_mod_mask;
1283         struct pcnet32_rx_head *rxp = &lp->rx_ring[entry];
1284         int npackets = 0;
1285
1286         /* If we own the next entry, it's a new packet. Send it up. */
1287         while (npackets < budget && (short)le16_to_cpu(rxp->status) >= 0) {
1288                 pcnet32_rx_entry(dev, lp, rxp, entry);
1289                 npackets += 1;
1290                 /*
1291                  * The docs say that the buffer length isn't touched, but Andrew
1292                  * Boyd of QNX reports that some revs of the 79C965 clear it.
1293                  */
1294                 rxp->buf_length = cpu_to_le16(2 - PKT_BUF_SZ);
1295                 wmb();  /* Make sure owner changes after others are visible */
1296                 rxp->status = cpu_to_le16(0x8000);
1297                 entry = (++lp->cur_rx) & lp->rx_mod_mask;
1298                 rxp = &lp->rx_ring[entry];
1299         }
1300
1301         return npackets;
1302 }
1303
1304 static int pcnet32_tx(struct net_device *dev)
1305 {
1306         struct pcnet32_private *lp = netdev_priv(dev);
1307         unsigned int dirty_tx = lp->dirty_tx;
1308         int delta;
1309         int must_restart = 0;
1310
1311         while (dirty_tx != lp->cur_tx) {
1312                 int entry = dirty_tx & lp->tx_mod_mask;
1313                 int status = (short)le16_to_cpu(lp->tx_ring[entry].status);
1314
1315                 if (status < 0)
1316                         break;  /* It still hasn't been Txed */
1317
1318                 lp->tx_ring[entry].base = 0;
1319
1320                 if (status & 0x4000) {
1321                         /* There was a major error, log it. */
1322                         int err_status = le32_to_cpu(lp->tx_ring[entry].misc);
1323                         dev->stats.tx_errors++;
1324                         if (netif_msg_tx_err(lp))
1325                                 printk(KERN_ERR
1326                                        "%s: Tx error status=%04x err_status=%08x\n",
1327                                        dev->name, status,
1328                                        err_status);
1329                         if (err_status & 0x04000000)
1330                                 dev->stats.tx_aborted_errors++;
1331                         if (err_status & 0x08000000)
1332                                 dev->stats.tx_carrier_errors++;
1333                         if (err_status & 0x10000000)
1334                                 dev->stats.tx_window_errors++;
1335 #ifndef DO_DXSUFLO
1336                         if (err_status & 0x40000000) {
1337                                 dev->stats.tx_fifo_errors++;
1338                                 /* Ackk!  On FIFO errors the Tx unit is turned off! */
1339                                 /* Remove this verbosity later! */
1340                                 if (netif_msg_tx_err(lp))
1341                                         printk(KERN_ERR
1342                                                "%s: Tx FIFO error!\n",
1343                                                dev->name);
1344                                 must_restart = 1;
1345                         }
1346 #else
1347                         if (err_status & 0x40000000) {
1348                                 dev->stats.tx_fifo_errors++;
1349                                 if (!lp->dxsuflo) {     /* If controller doesn't recover ... */
1350                                         /* Ackk!  On FIFO errors the Tx unit is turned off! */
1351                                         /* Remove this verbosity later! */
1352                                         if (netif_msg_tx_err(lp))
1353                                                 printk(KERN_ERR
1354                                                        "%s: Tx FIFO error!\n",
1355                                                        dev->name);
1356                                         must_restart = 1;
1357                                 }
1358                         }
1359 #endif
1360                 } else {
1361                         if (status & 0x1800)
1362                                 dev->stats.collisions++;
1363                         dev->stats.tx_packets++;
1364                 }
1365
1366                 /* We must free the original skb */
1367                 if (lp->tx_skbuff[entry]) {
1368                         pci_unmap_single(lp->pci_dev,
1369                                          lp->tx_dma_addr[entry],
1370                                          lp->tx_skbuff[entry]->
1371                                          len, PCI_DMA_TODEVICE);
1372                         dev_kfree_skb_any(lp->tx_skbuff[entry]);
1373                         lp->tx_skbuff[entry] = NULL;
1374                         lp->tx_dma_addr[entry] = 0;
1375                 }
1376                 dirty_tx++;
1377         }
1378
1379         delta = (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask + lp->tx_ring_size);
1380         if (delta > lp->tx_ring_size) {
1381                 if (netif_msg_drv(lp))
1382                         printk(KERN_ERR
1383                                "%s: out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
1384                                dev->name, dirty_tx, lp->cur_tx,
1385                                lp->tx_full);
1386                 dirty_tx += lp->tx_ring_size;
1387                 delta -= lp->tx_ring_size;
1388         }
1389
1390         if (lp->tx_full &&
1391             netif_queue_stopped(dev) &&
1392             delta < lp->tx_ring_size - 2) {
1393                 /* The ring is no longer full, clear tbusy. */
1394                 lp->tx_full = 0;
1395                 netif_wake_queue(dev);
1396         }
1397         lp->dirty_tx = dirty_tx;
1398
1399         return must_restart;
1400 }
1401
1402 #ifdef CONFIG_PCNET32_NAPI
1403 static int pcnet32_poll(struct napi_struct *napi, int budget)
1404 {
1405         struct pcnet32_private *lp = container_of(napi, struct pcnet32_private, napi);
1406         struct net_device *dev = lp->dev;
1407         unsigned long ioaddr = dev->base_addr;
1408         unsigned long flags;
1409         int work_done;
1410         u16 val;
1411
1412         work_done = pcnet32_rx(dev, budget);
1413
1414         spin_lock_irqsave(&lp->lock, flags);
1415         if (pcnet32_tx(dev)) {
1416                 /* reset the chip to clear the error condition, then restart */
1417                 lp->a.reset(ioaddr);
1418                 lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
1419                 pcnet32_restart(dev, CSR0_START);
1420                 netif_wake_queue(dev);
1421         }
1422         spin_unlock_irqrestore(&lp->lock, flags);
1423
1424         if (work_done < budget) {
1425                 spin_lock_irqsave(&lp->lock, flags);
1426
1427                 __netif_rx_complete(dev, napi);
1428
1429                 /* clear interrupt masks */
1430                 val = lp->a.read_csr(ioaddr, CSR3);
1431                 val &= 0x00ff;
1432                 lp->a.write_csr(ioaddr, CSR3, val);
1433
1434                 /* Set interrupt enable. */
1435                 lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
1436                 mmiowb();
1437                 spin_unlock_irqrestore(&lp->lock, flags);
1438         }
1439         return work_done;
1440 }
1441 #endif
1442
1443 #define PCNET32_REGS_PER_PHY    32
1444 #define PCNET32_MAX_PHYS        32
1445 static int pcnet32_get_regs_len(struct net_device *dev)
1446 {
1447         struct pcnet32_private *lp = netdev_priv(dev);
1448         int j = lp->phycount * PCNET32_REGS_PER_PHY;
1449
1450         return ((PCNET32_NUM_REGS + j) * sizeof(u16));
1451 }
1452
1453 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1454                              void *ptr)
1455 {
1456         int i, csr0;
1457         u16 *buff = ptr;
1458         struct pcnet32_private *lp = netdev_priv(dev);
1459         struct pcnet32_access *a = &lp->a;
1460         ulong ioaddr = dev->base_addr;
1461         unsigned long flags;
1462
1463         spin_lock_irqsave(&lp->lock, flags);
1464
1465         csr0 = a->read_csr(ioaddr, CSR0);
1466         if (!(csr0 & CSR0_STOP))        /* If not stopped */
1467                 pcnet32_suspend(dev, &flags, 1);
1468
1469         /* read address PROM */
1470         for (i = 0; i < 16; i += 2)
1471                 *buff++ = inw(ioaddr + i);
1472
1473         /* read control and status registers */
1474         for (i = 0; i < 90; i++) {
1475                 *buff++ = a->read_csr(ioaddr, i);
1476         }
1477
1478         *buff++ = a->read_csr(ioaddr, 112);
1479         *buff++ = a->read_csr(ioaddr, 114);
1480
1481         /* read bus configuration registers */
1482         for (i = 0; i < 30; i++) {
1483                 *buff++ = a->read_bcr(ioaddr, i);
1484         }
1485         *buff++ = 0;            /* skip bcr30 so as not to hang 79C976 */
1486         for (i = 31; i < 36; i++) {
1487                 *buff++ = a->read_bcr(ioaddr, i);
1488         }
1489
1490         /* read mii phy registers */
1491         if (lp->mii) {
1492                 int j;
1493                 for (j = 0; j < PCNET32_MAX_PHYS; j++) {
1494                         if (lp->phymask & (1 << j)) {
1495                                 for (i = 0; i < PCNET32_REGS_PER_PHY; i++) {
1496                                         lp->a.write_bcr(ioaddr, 33,
1497                                                         (j << 5) | i);
1498                                         *buff++ = lp->a.read_bcr(ioaddr, 34);
1499                                 }
1500                         }
1501                 }
1502         }
1503
1504         if (!(csr0 & CSR0_STOP)) {      /* If not stopped */
1505                 int csr5;
1506
1507                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
1508                 csr5 = a->read_csr(ioaddr, CSR5);
1509                 a->write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
1510         }
1511
1512         spin_unlock_irqrestore(&lp->lock, flags);
1513 }
1514
1515 static const struct ethtool_ops pcnet32_ethtool_ops = {
1516         .get_settings           = pcnet32_get_settings,
1517         .set_settings           = pcnet32_set_settings,
1518         .get_drvinfo            = pcnet32_get_drvinfo,
1519         .get_msglevel           = pcnet32_get_msglevel,
1520         .set_msglevel           = pcnet32_set_msglevel,
1521         .nway_reset             = pcnet32_nway_reset,
1522         .get_link               = pcnet32_get_link,
1523         .get_ringparam          = pcnet32_get_ringparam,
1524         .set_ringparam          = pcnet32_set_ringparam,
1525         .get_strings            = pcnet32_get_strings,
1526         .self_test              = pcnet32_ethtool_test,
1527         .phys_id                = pcnet32_phys_id,
1528         .get_regs_len           = pcnet32_get_regs_len,
1529         .get_regs               = pcnet32_get_regs,
1530         .get_sset_count         = pcnet32_get_sset_count,
1531 };
1532
1533 /* only probes for non-PCI devices, the rest are handled by
1534  * pci_register_driver via pcnet32_probe_pci */
1535
1536 static void __devinit pcnet32_probe_vlbus(unsigned int *pcnet32_portlist)
1537 {
1538         unsigned int *port, ioaddr;
1539
1540         /* search for PCnet32 VLB cards at known addresses */
1541         for (port = pcnet32_portlist; (ioaddr = *port); port++) {
1542                 if (request_region
1543                     (ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_vlbus")) {
1544                         /* check if there is really a pcnet chip on that ioaddr */
1545                         if ((inb(ioaddr + 14) == 0x57)
1546                             && (inb(ioaddr + 15) == 0x57)) {
1547                                 pcnet32_probe1(ioaddr, 0, NULL);
1548                         } else {
1549                                 release_region(ioaddr, PCNET32_TOTAL_SIZE);
1550                         }
1551                 }
1552         }
1553 }
1554
1555 static int __devinit
1556 pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
1557 {
1558         unsigned long ioaddr;
1559         int err;
1560
1561         err = pci_enable_device(pdev);
1562         if (err < 0) {
1563                 if (pcnet32_debug & NETIF_MSG_PROBE)
1564                         printk(KERN_ERR PFX
1565                                "failed to enable device -- err=%d\n", err);
1566                 return err;
1567         }
1568         pci_set_master(pdev);
1569
1570         ioaddr = pci_resource_start(pdev, 0);
1571         if (!ioaddr) {
1572                 if (pcnet32_debug & NETIF_MSG_PROBE)
1573                         printk(KERN_ERR PFX
1574                                "card has no PCI IO resources, aborting\n");
1575                 return -ENODEV;
1576         }
1577
1578         if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
1579                 if (pcnet32_debug & NETIF_MSG_PROBE)
1580                         printk(KERN_ERR PFX
1581                                "architecture does not support 32bit PCI busmaster DMA\n");
1582                 return -ENODEV;
1583         }
1584         if (request_region(ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_pci") ==
1585             NULL) {
1586                 if (pcnet32_debug & NETIF_MSG_PROBE)
1587                         printk(KERN_ERR PFX
1588                                "io address range already allocated\n");
1589                 return -EBUSY;
1590         }
1591
1592         err = pcnet32_probe1(ioaddr, 1, pdev);
1593         if (err < 0) {
1594                 pci_disable_device(pdev);
1595         }
1596         return err;
1597 }
1598
1599 /* pcnet32_probe1
1600  *  Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
1601  *  pdev will be NULL when called from pcnet32_probe_vlbus.
1602  */
1603 static int __devinit
1604 pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
1605 {
1606         struct pcnet32_private *lp;
1607         int i, media;
1608         int fdx, mii, fset, dxsuflo;
1609         int chip_version;
1610         char *chipname;
1611         struct net_device *dev;
1612         struct pcnet32_access *a = NULL;
1613         u8 promaddr[6];
1614         int ret = -ENODEV;
1615
1616         /* reset the chip */
1617         pcnet32_wio_reset(ioaddr);
1618
1619         /* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
1620         if (pcnet32_wio_read_csr(ioaddr, 0) == 4 && pcnet32_wio_check(ioaddr)) {
1621                 a = &pcnet32_wio;
1622         } else {
1623                 pcnet32_dwio_reset(ioaddr);
1624                 if (pcnet32_dwio_read_csr(ioaddr, 0) == 4
1625                     && pcnet32_dwio_check(ioaddr)) {
1626                         a = &pcnet32_dwio;
1627                 } else
1628                         goto err_release_region;
1629         }
1630
1631         chip_version =
1632             a->read_csr(ioaddr, 88) | (a->read_csr(ioaddr, 89) << 16);
1633         if ((pcnet32_debug & NETIF_MSG_PROBE) && (pcnet32_debug & NETIF_MSG_HW))
1634                 printk(KERN_INFO "  PCnet chip version is %#x.\n",
1635                        chip_version);
1636         if ((chip_version & 0xfff) != 0x003) {
1637                 if (pcnet32_debug & NETIF_MSG_PROBE)
1638                         printk(KERN_INFO PFX "Unsupported chip version.\n");
1639                 goto err_release_region;
1640         }
1641
1642         /* initialize variables */
1643         fdx = mii = fset = dxsuflo = 0;
1644         chip_version = (chip_version >> 12) & 0xffff;
1645
1646         switch (chip_version) {
1647         case 0x2420:
1648                 chipname = "PCnet/PCI 79C970";  /* PCI */
1649                 break;
1650         case 0x2430:
1651                 if (shared)
1652                         chipname = "PCnet/PCI 79C970";  /* 970 gives the wrong chip id back */
1653                 else
1654                         chipname = "PCnet/32 79C965";   /* 486/VL bus */
1655                 break;
1656         case 0x2621:
1657                 chipname = "PCnet/PCI II 79C970A";      /* PCI */
1658                 fdx = 1;
1659                 break;
1660         case 0x2623:
1661                 chipname = "PCnet/FAST 79C971"; /* PCI */
1662                 fdx = 1;
1663                 mii = 1;
1664                 fset = 1;
1665                 break;
1666         case 0x2624:
1667                 chipname = "PCnet/FAST+ 79C972";        /* PCI */
1668                 fdx = 1;
1669                 mii = 1;
1670                 fset = 1;
1671                 break;
1672         case 0x2625:
1673                 chipname = "PCnet/FAST III 79C973";     /* PCI */
1674                 fdx = 1;
1675                 mii = 1;
1676                 break;
1677         case 0x2626:
1678                 chipname = "PCnet/Home 79C978"; /* PCI */
1679                 fdx = 1;
1680                 /*
1681                  * This is based on specs published at www.amd.com.  This section
1682                  * assumes that a card with a 79C978 wants to go into standard
1683                  * ethernet mode.  The 79C978 can also go into 1Mb HomePNA mode,
1684                  * and the module option homepna=1 can select this instead.
1685                  */
1686                 media = a->read_bcr(ioaddr, 49);
1687                 media &= ~3;    /* default to 10Mb ethernet */
1688                 if (cards_found < MAX_UNITS && homepna[cards_found])
1689                         media |= 1;     /* switch to home wiring mode */
1690                 if (pcnet32_debug & NETIF_MSG_PROBE)
1691                         printk(KERN_DEBUG PFX "media set to %sMbit mode.\n",
1692                                (media & 1) ? "1" : "10");
1693                 a->write_bcr(ioaddr, 49, media);
1694                 break;
1695         case 0x2627:
1696                 chipname = "PCnet/FAST III 79C975";     /* PCI */
1697                 fdx = 1;
1698                 mii = 1;
1699                 break;
1700         case 0x2628:
1701                 chipname = "PCnet/PRO 79C976";
1702                 fdx = 1;
1703                 mii = 1;
1704                 break;
1705         default:
1706                 if (pcnet32_debug & NETIF_MSG_PROBE)
1707                         printk(KERN_INFO PFX
1708                                "PCnet version %#x, no PCnet32 chip.\n",
1709                                chip_version);
1710                 goto err_release_region;
1711         }
1712
1713         /*
1714          *  On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
1715          *  starting until the packet is loaded. Strike one for reliability, lose
1716          *  one for latency - although on PCI this isnt a big loss. Older chips
1717          *  have FIFO's smaller than a packet, so you can't do this.
1718          *  Turn on BCR18:BurstRdEn and BCR18:BurstWrEn.
1719          */
1720
1721         if (fset) {
1722                 a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0860));
1723                 a->write_csr(ioaddr, 80,
1724                              (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
1725                 dxsuflo = 1;
1726         }
1727
1728         dev = alloc_etherdev(sizeof(*lp));
1729         if (!dev) {
1730                 if (pcnet32_debug & NETIF_MSG_PROBE)
1731                         printk(KERN_ERR PFX "Memory allocation failed.\n");
1732                 ret = -ENOMEM;
1733                 goto err_release_region;
1734         }
1735         SET_NETDEV_DEV(dev, &pdev->dev);
1736
1737         if (pcnet32_debug & NETIF_MSG_PROBE)
1738                 printk(KERN_INFO PFX "%s at %#3lx,", chipname, ioaddr);
1739
1740         /* In most chips, after a chip reset, the ethernet address is read from the
1741          * station address PROM at the base address and programmed into the
1742          * "Physical Address Registers" CSR12-14.
1743          * As a precautionary measure, we read the PROM values and complain if
1744          * they disagree with the CSRs.  If they miscompare, and the PROM addr
1745          * is valid, then the PROM addr is used.
1746          */
1747         for (i = 0; i < 3; i++) {
1748                 unsigned int val;
1749                 val = a->read_csr(ioaddr, i + 12) & 0x0ffff;
1750                 /* There may be endianness issues here. */
1751                 dev->dev_addr[2 * i] = val & 0x0ff;
1752                 dev->dev_addr[2 * i + 1] = (val >> 8) & 0x0ff;
1753         }
1754
1755         /* read PROM address and compare with CSR address */
1756         for (i = 0; i < 6; i++)
1757                 promaddr[i] = inb(ioaddr + i);
1758
1759         if (memcmp(promaddr, dev->dev_addr, 6)
1760             || !is_valid_ether_addr(dev->dev_addr)) {
1761                 if (is_valid_ether_addr(promaddr)) {
1762                         if (pcnet32_debug & NETIF_MSG_PROBE) {
1763                                 printk(" warning: CSR address invalid,\n");
1764                                 printk(KERN_INFO
1765                                        "    using instead PROM address of");
1766                         }
1767                         memcpy(dev->dev_addr, promaddr, 6);
1768                 }
1769         }
1770         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1771
1772         /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
1773         if (!is_valid_ether_addr(dev->perm_addr))
1774                 memset(dev->dev_addr, 0, sizeof(dev->dev_addr));
1775
1776         if (pcnet32_debug & NETIF_MSG_PROBE) {
1777                 for (i = 0; i < 6; i++)
1778                         printk(" %2.2x", dev->dev_addr[i]);
1779
1780                 /* Version 0x2623 and 0x2624 */
1781                 if (((chip_version + 1) & 0xfffe) == 0x2624) {
1782                         i = a->read_csr(ioaddr, 80) & 0x0C00;   /* Check tx_start_pt */
1783                         printk("\n" KERN_INFO "    tx_start_pt(0x%04x):", i);
1784                         switch (i >> 10) {
1785                         case 0:
1786                                 printk("  20 bytes,");
1787                                 break;
1788                         case 1:
1789                                 printk("  64 bytes,");
1790                                 break;
1791                         case 2:
1792                                 printk(" 128 bytes,");
1793                                 break;
1794                         case 3:
1795                                 printk("~220 bytes,");
1796                                 break;
1797                         }
1798                         i = a->read_bcr(ioaddr, 18);    /* Check Burst/Bus control */
1799                         printk(" BCR18(%x):", i & 0xffff);
1800                         if (i & (1 << 5))
1801                                 printk("BurstWrEn ");
1802                         if (i & (1 << 6))
1803                                 printk("BurstRdEn ");
1804                         if (i & (1 << 7))
1805                                 printk("DWordIO ");
1806                         if (i & (1 << 11))
1807                                 printk("NoUFlow ");
1808                         i = a->read_bcr(ioaddr, 25);
1809                         printk("\n" KERN_INFO "    SRAMSIZE=0x%04x,", i << 8);
1810                         i = a->read_bcr(ioaddr, 26);
1811                         printk(" SRAM_BND=0x%04x,", i << 8);
1812                         i = a->read_bcr(ioaddr, 27);
1813                         if (i & (1 << 14))
1814                                 printk("LowLatRx");
1815                 }
1816         }
1817
1818         dev->base_addr = ioaddr;
1819         lp = netdev_priv(dev);
1820         /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
1821         if ((lp->init_block =
1822              pci_alloc_consistent(pdev, sizeof(*lp->init_block), &lp->init_dma_addr)) == NULL) {
1823                 if (pcnet32_debug & NETIF_MSG_PROBE)
1824                         printk(KERN_ERR PFX
1825                                "Consistent memory allocation failed.\n");
1826                 ret = -ENOMEM;
1827                 goto err_free_netdev;
1828         }
1829         lp->pci_dev = pdev;
1830
1831         lp->dev = dev;
1832
1833         spin_lock_init(&lp->lock);
1834
1835         SET_NETDEV_DEV(dev, &pdev->dev);
1836         lp->name = chipname;
1837         lp->shared_irq = shared;
1838         lp->tx_ring_size = TX_RING_SIZE;        /* default tx ring size */
1839         lp->rx_ring_size = RX_RING_SIZE;        /* default rx ring size */
1840         lp->tx_mod_mask = lp->tx_ring_size - 1;
1841         lp->rx_mod_mask = lp->rx_ring_size - 1;
1842         lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
1843         lp->rx_len_bits = (PCNET32_LOG_RX_BUFFERS << 4);
1844         lp->mii_if.full_duplex = fdx;
1845         lp->mii_if.phy_id_mask = 0x1f;
1846         lp->mii_if.reg_num_mask = 0x1f;
1847         lp->dxsuflo = dxsuflo;
1848         lp->mii = mii;
1849         lp->chip_version = chip_version;
1850         lp->msg_enable = pcnet32_debug;
1851         if ((cards_found >= MAX_UNITS)
1852             || (options[cards_found] > sizeof(options_mapping)))
1853                 lp->options = PCNET32_PORT_ASEL;
1854         else
1855                 lp->options = options_mapping[options[cards_found]];
1856         lp->mii_if.dev = dev;
1857         lp->mii_if.mdio_read = mdio_read;
1858         lp->mii_if.mdio_write = mdio_write;
1859
1860         /* napi.weight is used in both the napi and non-napi cases */
1861         lp->napi.weight = lp->rx_ring_size / 2;
1862
1863 #ifdef CONFIG_PCNET32_NAPI
1864         netif_napi_add(dev, &lp->napi, pcnet32_poll, lp->rx_ring_size / 2);
1865 #endif
1866
1867         if (fdx && !(lp->options & PCNET32_PORT_ASEL) &&
1868             ((cards_found >= MAX_UNITS) || full_duplex[cards_found]))
1869                 lp->options |= PCNET32_PORT_FD;
1870
1871         if (!a) {
1872                 if (pcnet32_debug & NETIF_MSG_PROBE)
1873                         printk(KERN_ERR PFX "No access methods\n");
1874                 ret = -ENODEV;
1875                 goto err_free_consistent;
1876         }
1877         lp->a = *a;
1878
1879         /* prior to register_netdev, dev->name is not yet correct */
1880         if (pcnet32_alloc_ring(dev, pci_name(lp->pci_dev))) {
1881                 ret = -ENOMEM;
1882                 goto err_free_ring;
1883         }
1884         /* detect special T1/E1 WAN card by checking for MAC address */
1885         if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0
1886             && dev->dev_addr[2] == 0x75)
1887                 lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
1888
1889         lp->init_block->mode = cpu_to_le16(0x0003);     /* Disable Rx and Tx. */
1890         lp->init_block->tlen_rlen =
1891             cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
1892         for (i = 0; i < 6; i++)
1893                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
1894         lp->init_block->filter[0] = 0x00000000;
1895         lp->init_block->filter[1] = 0x00000000;
1896         lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
1897         lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
1898
1899         /* switch pcnet32 to 32bit mode */
1900         a->write_bcr(ioaddr, 20, 2);
1901
1902         a->write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
1903         a->write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
1904
1905         if (pdev) {             /* use the IRQ provided by PCI */
1906                 dev->irq = pdev->irq;
1907                 if (pcnet32_debug & NETIF_MSG_PROBE)
1908                         printk(" assigned IRQ %d.\n", dev->irq);
1909         } else {
1910                 unsigned long irq_mask = probe_irq_on();
1911
1912                 /*
1913                  * To auto-IRQ we enable the initialization-done and DMA error
1914                  * interrupts. For ISA boards we get a DMA error, but VLB and PCI
1915                  * boards will work.
1916                  */
1917                 /* Trigger an initialization just for the interrupt. */
1918                 a->write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_INIT);
1919                 mdelay(1);
1920
1921                 dev->irq = probe_irq_off(irq_mask);
1922                 if (!dev->irq) {
1923                         if (pcnet32_debug & NETIF_MSG_PROBE)
1924                                 printk(", failed to detect IRQ line.\n");
1925                         ret = -ENODEV;
1926                         goto err_free_ring;
1927                 }
1928                 if (pcnet32_debug & NETIF_MSG_PROBE)
1929                         printk(", probed IRQ %d.\n", dev->irq);
1930         }
1931
1932         /* Set the mii phy_id so that we can query the link state */
1933         if (lp->mii) {
1934                 /* lp->phycount and lp->phymask are set to 0 by memset above */
1935
1936                 lp->mii_if.phy_id = ((lp->a.read_bcr(ioaddr, 33)) >> 5) & 0x1f;
1937                 /* scan for PHYs */
1938                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
1939                         unsigned short id1, id2;
1940
1941                         id1 = mdio_read(dev, i, MII_PHYSID1);
1942                         if (id1 == 0xffff)
1943                                 continue;
1944                         id2 = mdio_read(dev, i, MII_PHYSID2);
1945                         if (id2 == 0xffff)
1946                                 continue;
1947                         if (i == 31 && ((chip_version + 1) & 0xfffe) == 0x2624)
1948                                 continue;       /* 79C971 & 79C972 have phantom phy at id 31 */
1949                         lp->phycount++;
1950                         lp->phymask |= (1 << i);
1951                         lp->mii_if.phy_id = i;
1952                         if (pcnet32_debug & NETIF_MSG_PROBE)
1953                                 printk(KERN_INFO PFX
1954                                        "Found PHY %04x:%04x at address %d.\n",
1955                                        id1, id2, i);
1956                 }
1957                 lp->a.write_bcr(ioaddr, 33, (lp->mii_if.phy_id) << 5);
1958                 if (lp->phycount > 1) {
1959                         lp->options |= PCNET32_PORT_MII;
1960                 }
1961         }
1962
1963         init_timer(&lp->watchdog_timer);
1964         lp->watchdog_timer.data = (unsigned long)dev;
1965         lp->watchdog_timer.function = (void *)&pcnet32_watchdog;
1966
1967         /* The PCNET32-specific entries in the device structure. */
1968         dev->open = &pcnet32_open;
1969         dev->hard_start_xmit = &pcnet32_start_xmit;
1970         dev->stop = &pcnet32_close;
1971         dev->get_stats = &pcnet32_get_stats;
1972         dev->set_multicast_list = &pcnet32_set_multicast_list;
1973         dev->do_ioctl = &pcnet32_ioctl;
1974         dev->ethtool_ops = &pcnet32_ethtool_ops;
1975         dev->tx_timeout = pcnet32_tx_timeout;
1976         dev->watchdog_timeo = (5 * HZ);
1977
1978 #ifdef CONFIG_NET_POLL_CONTROLLER
1979         dev->poll_controller = pcnet32_poll_controller;
1980 #endif
1981
1982         /* Fill in the generic fields of the device structure. */
1983         if (register_netdev(dev))
1984                 goto err_free_ring;
1985
1986         if (pdev) {
1987                 pci_set_drvdata(pdev, dev);
1988         } else {
1989                 lp->next = pcnet32_dev;
1990                 pcnet32_dev = dev;
1991         }
1992
1993         if (pcnet32_debug & NETIF_MSG_PROBE)
1994                 printk(KERN_INFO "%s: registered as %s\n", dev->name, lp->name);
1995         cards_found++;
1996
1997         /* enable LED writes */
1998         a->write_bcr(ioaddr, 2, a->read_bcr(ioaddr, 2) | 0x1000);
1999
2000         return 0;
2001
2002       err_free_ring:
2003         pcnet32_free_ring(dev);
2004       err_free_consistent:
2005         pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
2006                             lp->init_block, lp->init_dma_addr);
2007       err_free_netdev:
2008         free_netdev(dev);
2009       err_release_region:
2010         release_region(ioaddr, PCNET32_TOTAL_SIZE);
2011         return ret;
2012 }
2013
2014 /* if any allocation fails, caller must also call pcnet32_free_ring */
2015 static int pcnet32_alloc_ring(struct net_device *dev, char *name)
2016 {
2017         struct pcnet32_private *lp = netdev_priv(dev);
2018
2019         lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
2020                                            sizeof(struct pcnet32_tx_head) *
2021                                            lp->tx_ring_size,
2022                                            &lp->tx_ring_dma_addr);
2023         if (lp->tx_ring == NULL) {
2024                 if (netif_msg_drv(lp))
2025                         printk("\n" KERN_ERR PFX
2026                                "%s: Consistent memory allocation failed.\n",
2027                                name);
2028                 return -ENOMEM;
2029         }
2030
2031         lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
2032                                            sizeof(struct pcnet32_rx_head) *
2033                                            lp->rx_ring_size,
2034                                            &lp->rx_ring_dma_addr);
2035         if (lp->rx_ring == NULL) {
2036                 if (netif_msg_drv(lp))
2037                         printk("\n" KERN_ERR PFX
2038                                "%s: Consistent memory allocation failed.\n",
2039                                name);
2040                 return -ENOMEM;
2041         }
2042
2043         lp->tx_dma_addr = kcalloc(lp->tx_ring_size, sizeof(dma_addr_t),
2044                                   GFP_ATOMIC);
2045         if (!lp->tx_dma_addr) {
2046                 if (netif_msg_drv(lp))
2047                         printk("\n" KERN_ERR PFX
2048                                "%s: Memory allocation failed.\n", name);
2049                 return -ENOMEM;
2050         }
2051
2052         lp->rx_dma_addr = kcalloc(lp->rx_ring_size, sizeof(dma_addr_t),
2053                                   GFP_ATOMIC);
2054         if (!lp->rx_dma_addr) {
2055                 if (netif_msg_drv(lp))
2056                         printk("\n" KERN_ERR PFX
2057                                "%s: Memory allocation failed.\n", name);
2058                 return -ENOMEM;
2059         }
2060
2061         lp->tx_skbuff = kcalloc(lp->tx_ring_size, sizeof(struct sk_buff *),
2062                                 GFP_ATOMIC);
2063         if (!lp->tx_skbuff) {
2064                 if (netif_msg_drv(lp))
2065                         printk("\n" KERN_ERR PFX
2066                                "%s: Memory allocation failed.\n", name);
2067                 return -ENOMEM;
2068         }
2069
2070         lp->rx_skbuff = kcalloc(lp->rx_ring_size, sizeof(struct sk_buff *),
2071                                 GFP_ATOMIC);
2072         if (!lp->rx_skbuff) {
2073                 if (netif_msg_drv(lp))
2074                         printk("\n" KERN_ERR PFX
2075                                "%s: Memory allocation failed.\n", name);
2076                 return -ENOMEM;
2077         }
2078
2079         return 0;
2080 }
2081
2082 static void pcnet32_free_ring(struct net_device *dev)
2083 {
2084         struct pcnet32_private *lp = netdev_priv(dev);
2085
2086         kfree(lp->tx_skbuff);
2087         lp->tx_skbuff = NULL;
2088
2089         kfree(lp->rx_skbuff);
2090         lp->rx_skbuff = NULL;
2091
2092         kfree(lp->tx_dma_addr);
2093         lp->tx_dma_addr = NULL;
2094
2095         kfree(lp->rx_dma_addr);
2096         lp->rx_dma_addr = NULL;
2097
2098         if (lp->tx_ring) {
2099                 pci_free_consistent(lp->pci_dev,
2100                                     sizeof(struct pcnet32_tx_head) *
2101                                     lp->tx_ring_size, lp->tx_ring,
2102                                     lp->tx_ring_dma_addr);
2103                 lp->tx_ring = NULL;
2104         }
2105
2106         if (lp->rx_ring) {
2107                 pci_free_consistent(lp->pci_dev,
2108                                     sizeof(struct pcnet32_rx_head) *
2109                                     lp->rx_ring_size, lp->rx_ring,
2110                                     lp->rx_ring_dma_addr);
2111                 lp->rx_ring = NULL;
2112         }
2113 }
2114
2115 static int pcnet32_open(struct net_device *dev)
2116 {
2117         struct pcnet32_private *lp = netdev_priv(dev);
2118         unsigned long ioaddr = dev->base_addr;
2119         u16 val;
2120         int i;
2121         int rc;
2122         unsigned long flags;
2123
2124         if (request_irq(dev->irq, &pcnet32_interrupt,
2125                         lp->shared_irq ? IRQF_SHARED : 0, dev->name,
2126                         (void *)dev)) {
2127                 return -EAGAIN;
2128         }
2129
2130         spin_lock_irqsave(&lp->lock, flags);
2131         /* Check for a valid station address */
2132         if (!is_valid_ether_addr(dev->dev_addr)) {
2133                 rc = -EINVAL;
2134                 goto err_free_irq;
2135         }
2136
2137         /* Reset the PCNET32 */
2138         lp->a.reset(ioaddr);
2139
2140         /* switch pcnet32 to 32bit mode */
2141         lp->a.write_bcr(ioaddr, 20, 2);
2142
2143         if (netif_msg_ifup(lp))
2144                 printk(KERN_DEBUG
2145                        "%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n",
2146                        dev->name, dev->irq, (u32) (lp->tx_ring_dma_addr),
2147                        (u32) (lp->rx_ring_dma_addr),
2148                        (u32) (lp->init_dma_addr));
2149
2150         /* set/reset autoselect bit */
2151         val = lp->a.read_bcr(ioaddr, 2) & ~2;
2152         if (lp->options & PCNET32_PORT_ASEL)
2153                 val |= 2;
2154         lp->a.write_bcr(ioaddr, 2, val);
2155
2156         /* handle full duplex setting */
2157         if (lp->mii_if.full_duplex) {
2158                 val = lp->a.read_bcr(ioaddr, 9) & ~3;
2159                 if (lp->options & PCNET32_PORT_FD) {
2160                         val |= 1;
2161                         if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
2162                                 val |= 2;
2163                 } else if (lp->options & PCNET32_PORT_ASEL) {
2164                         /* workaround of xSeries250, turn on for 79C975 only */
2165                         if (lp->chip_version == 0x2627)
2166                                 val |= 3;
2167                 }
2168                 lp->a.write_bcr(ioaddr, 9, val);
2169         }
2170
2171         /* set/reset GPSI bit in test register */
2172         val = lp->a.read_csr(ioaddr, 124) & ~0x10;
2173         if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
2174                 val |= 0x10;
2175         lp->a.write_csr(ioaddr, 124, val);
2176
2177         /* Allied Telesyn AT 2700/2701 FX are 100Mbit only and do not negotiate */
2178         if (lp->pci_dev->subsystem_vendor == PCI_VENDOR_ID_AT &&
2179             (lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
2180              lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
2181                 if (lp->options & PCNET32_PORT_ASEL) {
2182                         lp->options = PCNET32_PORT_FD | PCNET32_PORT_100;
2183                         if (netif_msg_link(lp))
2184                                 printk(KERN_DEBUG
2185                                        "%s: Setting 100Mb-Full Duplex.\n",
2186                                        dev->name);
2187                 }
2188         }
2189         if (lp->phycount < 2) {
2190                 /*
2191                  * 24 Jun 2004 according AMD, in order to change the PHY,
2192                  * DANAS (or DISPM for 79C976) must be set; then select the speed,
2193                  * duplex, and/or enable auto negotiation, and clear DANAS
2194                  */
2195                 if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
2196                         lp->a.write_bcr(ioaddr, 32,
2197                                         lp->a.read_bcr(ioaddr, 32) | 0x0080);
2198                         /* disable Auto Negotiation, set 10Mpbs, HD */
2199                         val = lp->a.read_bcr(ioaddr, 32) & ~0xb8;
2200                         if (lp->options & PCNET32_PORT_FD)
2201                                 val |= 0x10;
2202                         if (lp->options & PCNET32_PORT_100)
2203                                 val |= 0x08;
2204                         lp->a.write_bcr(ioaddr, 32, val);
2205                 } else {
2206                         if (lp->options & PCNET32_PORT_ASEL) {
2207                                 lp->a.write_bcr(ioaddr, 32,
2208                                                 lp->a.read_bcr(ioaddr,
2209                                                                32) | 0x0080);
2210                                 /* enable auto negotiate, setup, disable fd */
2211                                 val = lp->a.read_bcr(ioaddr, 32) & ~0x98;
2212                                 val |= 0x20;
2213                                 lp->a.write_bcr(ioaddr, 32, val);
2214                         }
2215                 }
2216         } else {
2217                 int first_phy = -1;
2218                 u16 bmcr;
2219                 u32 bcr9;
2220                 struct ethtool_cmd ecmd;
2221
2222                 /*
2223                  * There is really no good other way to handle multiple PHYs
2224                  * other than turning off all automatics
2225                  */
2226                 val = lp->a.read_bcr(ioaddr, 2);
2227                 lp->a.write_bcr(ioaddr, 2, val & ~2);
2228                 val = lp->a.read_bcr(ioaddr, 32);
2229                 lp->a.write_bcr(ioaddr, 32, val & ~(1 << 7));   /* stop MII manager */
2230
2231                 if (!(lp->options & PCNET32_PORT_ASEL)) {
2232                         /* setup ecmd */
2233                         ecmd.port = PORT_MII;
2234                         ecmd.transceiver = XCVR_INTERNAL;
2235                         ecmd.autoneg = AUTONEG_DISABLE;
2236                         ecmd.speed =
2237                             lp->
2238                             options & PCNET32_PORT_100 ? SPEED_100 : SPEED_10;
2239                         bcr9 = lp->a.read_bcr(ioaddr, 9);
2240
2241                         if (lp->options & PCNET32_PORT_FD) {
2242                                 ecmd.duplex = DUPLEX_FULL;
2243                                 bcr9 |= (1 << 0);
2244                         } else {
2245                                 ecmd.duplex = DUPLEX_HALF;
2246                                 bcr9 |= ~(1 << 0);
2247                         }
2248                         lp->a.write_bcr(ioaddr, 9, bcr9);
2249                 }
2250
2251                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2252                         if (lp->phymask & (1 << i)) {
2253                                 /* isolate all but the first PHY */
2254                                 bmcr = mdio_read(dev, i, MII_BMCR);
2255                                 if (first_phy == -1) {
2256                                         first_phy = i;
2257                                         mdio_write(dev, i, MII_BMCR,
2258                                                    bmcr & ~BMCR_ISOLATE);
2259                                 } else {
2260                                         mdio_write(dev, i, MII_BMCR,
2261                                                    bmcr | BMCR_ISOLATE);
2262                                 }
2263                                 /* use mii_ethtool_sset to setup PHY */
2264                                 lp->mii_if.phy_id = i;
2265                                 ecmd.phy_address = i;
2266                                 if (lp->options & PCNET32_PORT_ASEL) {
2267                                         mii_ethtool_gset(&lp->mii_if, &ecmd);
2268                                         ecmd.autoneg = AUTONEG_ENABLE;
2269                                 }
2270                                 mii_ethtool_sset(&lp->mii_if, &ecmd);
2271                         }
2272                 }
2273                 lp->mii_if.phy_id = first_phy;
2274                 if (netif_msg_link(lp))
2275                         printk(KERN_INFO "%s: Using PHY number %d.\n",
2276                                dev->name, first_phy);
2277         }
2278
2279 #ifdef DO_DXSUFLO
2280         if (lp->dxsuflo) {      /* Disable transmit stop on underflow */
2281                 val = lp->a.read_csr(ioaddr, CSR3);
2282                 val |= 0x40;
2283                 lp->a.write_csr(ioaddr, CSR3, val);
2284         }
2285 #endif
2286
2287         lp->init_block->mode =
2288             cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2289         pcnet32_load_multicast(dev);
2290
2291         if (pcnet32_init_ring(dev)) {
2292                 rc = -ENOMEM;
2293                 goto err_free_ring;
2294         }
2295
2296 #ifdef CONFIG_PCNET32_NAPI
2297         napi_enable(&lp->napi);
2298 #endif
2299
2300         /* Re-initialize the PCNET32, and start it when done. */
2301         lp->a.write_csr(ioaddr, 1, (lp->init_dma_addr & 0xffff));
2302         lp->a.write_csr(ioaddr, 2, (lp->init_dma_addr >> 16));
2303
2304         lp->a.write_csr(ioaddr, CSR4, 0x0915);  /* auto tx pad */
2305         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2306
2307         netif_start_queue(dev);
2308
2309         if (lp->chip_version >= PCNET32_79C970A) {
2310                 /* Print the link status and start the watchdog */
2311                 pcnet32_check_media(dev, 1);
2312                 mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
2313         }
2314
2315         i = 0;
2316         while (i++ < 100)
2317                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2318                         break;
2319         /*
2320          * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
2321          * reports that doing so triggers a bug in the '974.
2322          */
2323         lp->a.write_csr(ioaddr, CSR0, CSR0_NORMAL);
2324
2325         if (netif_msg_ifup(lp))
2326                 printk(KERN_DEBUG
2327                        "%s: pcnet32 open after %d ticks, init block %#x csr0 %4.4x.\n",
2328                        dev->name, i,
2329                        (u32) (lp->init_dma_addr),
2330                        lp->a.read_csr(ioaddr, CSR0));
2331
2332         spin_unlock_irqrestore(&lp->lock, flags);
2333
2334         return 0;               /* Always succeed */
2335
2336       err_free_ring:
2337         /* free any allocated skbuffs */
2338         pcnet32_purge_rx_ring(dev);
2339
2340         /*
2341          * Switch back to 16bit mode to avoid problems with dumb
2342          * DOS packet driver after a warm reboot
2343          */
2344         lp->a.write_bcr(ioaddr, 20, 4);
2345
2346       err_free_irq:
2347         spin_unlock_irqrestore(&lp->lock, flags);
2348         free_irq(dev->irq, dev);
2349         return rc;
2350 }
2351
2352 /*
2353  * The LANCE has been halted for one reason or another (busmaster memory
2354  * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
2355  * etc.).  Modern LANCE variants always reload their ring-buffer
2356  * configuration when restarted, so we must reinitialize our ring
2357  * context before restarting.  As part of this reinitialization,
2358  * find all packets still on the Tx ring and pretend that they had been
2359  * sent (in effect, drop the packets on the floor) - the higher-level
2360  * protocols will time out and retransmit.  It'd be better to shuffle
2361  * these skbs to a temp list and then actually re-Tx them after
2362  * restarting the chip, but I'm too lazy to do so right now.  dplatt@3do.com
2363  */
2364
2365 static void pcnet32_purge_tx_ring(struct net_device *dev)
2366 {
2367         struct pcnet32_private *lp = netdev_priv(dev);
2368         int i;
2369
2370         for (i = 0; i < lp->tx_ring_size; i++) {
2371                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2372                 wmb();          /* Make sure adapter sees owner change */
2373                 if (lp->tx_skbuff[i]) {
2374                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i],
2375                                          lp->tx_skbuff[i]->len,
2376                                          PCI_DMA_TODEVICE);
2377                         dev_kfree_skb_any(lp->tx_skbuff[i]);
2378                 }
2379                 lp->tx_skbuff[i] = NULL;
2380                 lp->tx_dma_addr[i] = 0;
2381         }
2382 }
2383
2384 /* Initialize the PCNET32 Rx and Tx rings. */
2385 static int pcnet32_init_ring(struct net_device *dev)
2386 {
2387         struct pcnet32_private *lp = netdev_priv(dev);
2388         int i;
2389
2390         lp->tx_full = 0;
2391         lp->cur_rx = lp->cur_tx = 0;
2392         lp->dirty_rx = lp->dirty_tx = 0;
2393
2394         for (i = 0; i < lp->rx_ring_size; i++) {
2395                 struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
2396                 if (rx_skbuff == NULL) {
2397                         if (!
2398                             (rx_skbuff = lp->rx_skbuff[i] =
2399                              dev_alloc_skb(PKT_BUF_SZ))) {
2400                                 /* there is not much, we can do at this point */
2401                                 if (netif_msg_drv(lp))
2402                                         printk(KERN_ERR
2403                                                "%s: pcnet32_init_ring dev_alloc_skb failed.\n",
2404                                                dev->name);
2405                                 return -1;
2406                         }
2407                         skb_reserve(rx_skbuff, 2);
2408                 }
2409
2410                 rmb();
2411                 if (lp->rx_dma_addr[i] == 0)
2412                         lp->rx_dma_addr[i] =
2413                             pci_map_single(lp->pci_dev, rx_skbuff->data,
2414                                            PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
2415                 lp->rx_ring[i].base = cpu_to_le32(lp->rx_dma_addr[i]);
2416                 lp->rx_ring[i].buf_length = cpu_to_le16(2 - PKT_BUF_SZ);
2417                 wmb();          /* Make sure owner changes after all others are visible */
2418                 lp->rx_ring[i].status = cpu_to_le16(0x8000);
2419         }
2420         /* The Tx buffer address is filled in as needed, but we do need to clear
2421          * the upper ownership bit. */
2422         for (i = 0; i < lp->tx_ring_size; i++) {
2423                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2424                 wmb();          /* Make sure adapter sees owner change */
2425                 lp->tx_ring[i].base = 0;
2426                 lp->tx_dma_addr[i] = 0;
2427         }
2428
2429         lp->init_block->tlen_rlen =
2430             cpu_to_le16(lp->tx_len_bits | lp->rx_len_bits);
2431         for (i = 0; i < 6; i++)
2432                 lp->init_block->phys_addr[i] = dev->dev_addr[i];
2433         lp->init_block->rx_ring = cpu_to_le32(lp->rx_ring_dma_addr);
2434         lp->init_block->tx_ring = cpu_to_le32(lp->tx_ring_dma_addr);
2435         wmb();                  /* Make sure all changes are visible */
2436         return 0;
2437 }
2438
2439 /* the pcnet32 has been issued a stop or reset.  Wait for the stop bit
2440  * then flush the pending transmit operations, re-initialize the ring,
2441  * and tell the chip to initialize.
2442  */
2443 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
2444 {
2445         struct pcnet32_private *lp = netdev_priv(dev);
2446         unsigned long ioaddr = dev->base_addr;
2447         int i;
2448
2449         /* wait for stop */
2450         for (i = 0; i < 100; i++)
2451                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_STOP)
2452                         break;
2453
2454         if (i >= 100 && netif_msg_drv(lp))
2455                 printk(KERN_ERR
2456                        "%s: pcnet32_restart timed out waiting for stop.\n",
2457                        dev->name);
2458
2459         pcnet32_purge_tx_ring(dev);
2460         if (pcnet32_init_ring(dev))
2461                 return;
2462
2463         /* ReInit Ring */
2464         lp->a.write_csr(ioaddr, CSR0, CSR0_INIT);
2465         i = 0;
2466         while (i++ < 1000)
2467                 if (lp->a.read_csr(ioaddr, CSR0) & CSR0_IDON)
2468                         break;
2469
2470         lp->a.write_csr(ioaddr, CSR0, csr0_bits);
2471 }
2472
2473 static void pcnet32_tx_timeout(struct net_device *dev)
2474 {
2475         struct pcnet32_private *lp = netdev_priv(dev);
2476         unsigned long ioaddr = dev->base_addr, flags;
2477
2478         spin_lock_irqsave(&lp->lock, flags);
2479         /* Transmitter timeout, serious problems. */
2480         if (pcnet32_debug & NETIF_MSG_DRV)
2481                 printk(KERN_ERR
2482                        "%s: transmit timed out, status %4.4x, resetting.\n",
2483                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2484         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2485         dev->stats.tx_errors++;
2486         if (netif_msg_tx_err(lp)) {
2487                 int i;
2488                 printk(KERN_DEBUG
2489                        " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
2490                        lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
2491                        lp->cur_rx);
2492                 for (i = 0; i < lp->rx_ring_size; i++)
2493                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2494                                le32_to_cpu(lp->rx_ring[i].base),
2495                                (-le16_to_cpu(lp->rx_ring[i].buf_length)) &
2496                                0xffff, le32_to_cpu(lp->rx_ring[i].msg_length),
2497                                le16_to_cpu(lp->rx_ring[i].status));
2498                 for (i = 0; i < lp->tx_ring_size; i++)
2499                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
2500                                le32_to_cpu(lp->tx_ring[i].base),
2501                                (-le16_to_cpu(lp->tx_ring[i].length)) & 0xffff,
2502                                le32_to_cpu(lp->tx_ring[i].misc),
2503                                le16_to_cpu(lp->tx_ring[i].status));
2504                 printk("\n");
2505         }
2506         pcnet32_restart(dev, CSR0_NORMAL);
2507
2508         dev->trans_start = jiffies;
2509         netif_wake_queue(dev);
2510
2511         spin_unlock_irqrestore(&lp->lock, flags);
2512 }
2513
2514 static int pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
2515 {
2516         struct pcnet32_private *lp = netdev_priv(dev);
2517         unsigned long ioaddr = dev->base_addr;
2518         u16 status;
2519         int entry;
2520         unsigned long flags;
2521
2522         spin_lock_irqsave(&lp->lock, flags);
2523
2524         if (netif_msg_tx_queued(lp)) {
2525                 printk(KERN_DEBUG
2526                        "%s: pcnet32_start_xmit() called, csr0 %4.4x.\n",
2527                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2528         }
2529
2530         /* Default status -- will not enable Successful-TxDone
2531          * interrupt when that option is available to us.
2532          */
2533         status = 0x8300;
2534
2535         /* Fill in a Tx ring entry */
2536
2537         /* Mask to ring buffer boundary. */
2538         entry = lp->cur_tx & lp->tx_mod_mask;
2539
2540         /* Caution: the write order is important here, set the status
2541          * with the "ownership" bits last. */
2542
2543         lp->tx_ring[entry].length = cpu_to_le16(-skb->len);
2544
2545         lp->tx_ring[entry].misc = 0x00000000;
2546
2547         lp->tx_skbuff[entry] = skb;
2548         lp->tx_dma_addr[entry] =
2549             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
2550         lp->tx_ring[entry].base = cpu_to_le32(lp->tx_dma_addr[entry]);
2551         wmb();                  /* Make sure owner changes after all others are visible */
2552         lp->tx_ring[entry].status = cpu_to_le16(status);
2553
2554         lp->cur_tx++;
2555         dev->stats.tx_bytes += skb->len;
2556
2557         /* Trigger an immediate send poll. */
2558         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN | CSR0_TXPOLL);
2559
2560         dev->trans_start = jiffies;
2561
2562         if (lp->tx_ring[(entry + 1) & lp->tx_mod_mask].base != 0) {
2563                 lp->tx_full = 1;
2564                 netif_stop_queue(dev);
2565         }
2566         spin_unlock_irqrestore(&lp->lock, flags);
2567         return 0;
2568 }
2569
2570 /* The PCNET32 interrupt handler. */
2571 static irqreturn_t
2572 pcnet32_interrupt(int irq, void *dev_id)
2573 {
2574         struct net_device *dev = dev_id;
2575         struct pcnet32_private *lp;
2576         unsigned long ioaddr;
2577         u16 csr0;
2578         int boguscnt = max_interrupt_work;
2579
2580         ioaddr = dev->base_addr;
2581         lp = netdev_priv(dev);
2582
2583         spin_lock(&lp->lock);
2584
2585         csr0 = lp->a.read_csr(ioaddr, CSR0);
2586         while ((csr0 & 0x8f00) && --boguscnt >= 0) {
2587                 if (csr0 == 0xffff) {
2588                         break;  /* PCMCIA remove happened */
2589                 }
2590                 /* Acknowledge all of the current interrupt sources ASAP. */
2591                 lp->a.write_csr(ioaddr, CSR0, csr0 & ~0x004f);
2592
2593                 if (netif_msg_intr(lp))
2594                         printk(KERN_DEBUG
2595                                "%s: interrupt  csr0=%#2.2x new csr=%#2.2x.\n",
2596                                dev->name, csr0, lp->a.read_csr(ioaddr, CSR0));
2597
2598                 /* Log misc errors. */
2599                 if (csr0 & 0x4000)
2600                         dev->stats.tx_errors++; /* Tx babble. */
2601                 if (csr0 & 0x1000) {
2602                         /*
2603                          * This happens when our receive ring is full. This
2604                          * shouldn't be a problem as we will see normal rx
2605                          * interrupts for the frames in the receive ring.  But
2606                          * there are some PCI chipsets (I can reproduce this
2607                          * on SP3G with Intel saturn chipset) which have
2608                          * sometimes problems and will fill up the receive
2609                          * ring with error descriptors.  In this situation we
2610                          * don't get a rx interrupt, but a missed frame
2611                          * interrupt sooner or later.
2612                          */
2613                         dev->stats.rx_errors++; /* Missed a Rx frame. */
2614                 }
2615                 if (csr0 & 0x0800) {
2616                         if (netif_msg_drv(lp))
2617                                 printk(KERN_ERR
2618                                        "%s: Bus master arbitration failure, status %4.4x.\n",
2619                                        dev->name, csr0);
2620                         /* unlike for the lance, there is no restart needed */
2621                 }
2622 #ifdef CONFIG_PCNET32_NAPI
2623                 if (netif_rx_schedule_prep(dev, &lp->napi)) {
2624                         u16 val;
2625                         /* set interrupt masks */
2626                         val = lp->a.read_csr(ioaddr, CSR3);
2627                         val |= 0x5f00;
2628                         lp->a.write_csr(ioaddr, CSR3, val);
2629                         mmiowb();
2630                         __netif_rx_schedule(dev, &lp->napi);
2631                         break;
2632                 }
2633 #else
2634                 pcnet32_rx(dev, lp->napi.weight);
2635                 if (pcnet32_tx(dev)) {
2636                         /* reset the chip to clear the error condition, then restart */
2637                         lp->a.reset(ioaddr);
2638                         lp->a.write_csr(ioaddr, CSR4, 0x0915); /* auto tx pad */
2639                         pcnet32_restart(dev, CSR0_START);
2640                         netif_wake_queue(dev);
2641                 }
2642 #endif
2643                 csr0 = lp->a.read_csr(ioaddr, CSR0);
2644         }
2645
2646 #ifndef CONFIG_PCNET32_NAPI
2647         /* Set interrupt enable. */
2648         lp->a.write_csr(ioaddr, CSR0, CSR0_INTEN);
2649 #endif
2650
2651         if (netif_msg_intr(lp))
2652                 printk(KERN_DEBUG "%s: exiting interrupt, csr0=%#4.4x.\n",
2653                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2654
2655         spin_unlock(&lp->lock);
2656
2657         return IRQ_HANDLED;
2658 }
2659
2660 static int pcnet32_close(struct net_device *dev)
2661 {
2662         unsigned long ioaddr = dev->base_addr;
2663         struct pcnet32_private *lp = netdev_priv(dev);
2664         unsigned long flags;
2665
2666         del_timer_sync(&lp->watchdog_timer);
2667
2668         netif_stop_queue(dev);
2669 #ifdef CONFIG_PCNET32_NAPI
2670         napi_disable(&lp->napi);
2671 #endif
2672
2673         spin_lock_irqsave(&lp->lock, flags);
2674
2675         dev->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2676
2677         if (netif_msg_ifdown(lp))
2678                 printk(KERN_DEBUG
2679                        "%s: Shutting down ethercard, status was %2.2x.\n",
2680                        dev->name, lp->a.read_csr(ioaddr, CSR0));
2681
2682         /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
2683         lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2684
2685         /*
2686          * Switch back to 16bit mode to avoid problems with dumb
2687          * DOS packet driver after a warm reboot
2688          */
2689         lp->a.write_bcr(ioaddr, 20, 4);
2690
2691         spin_unlock_irqrestore(&lp->lock, flags);
2692
2693         free_irq(dev->irq, dev);
2694
2695         spin_lock_irqsave(&lp->lock, flags);
2696
2697         pcnet32_purge_rx_ring(dev);
2698         pcnet32_purge_tx_ring(dev);
2699
2700         spin_unlock_irqrestore(&lp->lock, flags);
2701
2702         return 0;
2703 }
2704
2705 static struct net_device_stats *pcnet32_get_stats(struct net_device *dev)
2706 {
2707         struct pcnet32_private *lp = netdev_priv(dev);
2708         unsigned long ioaddr = dev->base_addr;
2709         unsigned long flags;
2710
2711         spin_lock_irqsave(&lp->lock, flags);
2712         dev->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2713         spin_unlock_irqrestore(&lp->lock, flags);
2714
2715         return &dev->stats;
2716 }
2717
2718 /* taken from the sunlance driver, which it took from the depca driver */
2719 static void pcnet32_load_multicast(struct net_device *dev)
2720 {
2721         struct pcnet32_private *lp = netdev_priv(dev);
2722         volatile struct pcnet32_init_block *ib = lp->init_block;
2723         volatile __le16 *mcast_table = (__le16 *)ib->filter;
2724         struct dev_mc_list *dmi = dev->mc_list;
2725         unsigned long ioaddr = dev->base_addr;
2726         char *addrs;
2727         int i;
2728         u32 crc;
2729
2730         /* set all multicast bits */
2731         if (dev->flags & IFF_ALLMULTI) {
2732                 ib->filter[0] = cpu_to_le32(~0U);
2733                 ib->filter[1] = cpu_to_le32(~0U);
2734                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER, 0xffff);
2735                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+1, 0xffff);
2736                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+2, 0xffff);
2737                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER+3, 0xffff);
2738                 return;
2739         }
2740         /* clear the multicast filter */
2741         ib->filter[0] = 0;
2742         ib->filter[1] = 0;
2743
2744         /* Add addresses */
2745         for (i = 0; i < dev->mc_count; i++) {
2746                 addrs = dmi->dmi_addr;
2747                 dmi = dmi->next;
2748
2749                 /* multicast address? */
2750                 if (!(*addrs & 1))
2751                         continue;
2752
2753                 crc = ether_crc_le(6, addrs);
2754                 crc = crc >> 26;
2755                 mcast_table[crc >> 4] |= cpu_to_le16(1 << (crc & 0xf));
2756         }
2757         for (i = 0; i < 4; i++)
2758                 lp->a.write_csr(ioaddr, PCNET32_MC_FILTER + i,
2759                                 le16_to_cpu(mcast_table[i]));
2760         return;
2761 }
2762
2763 /*
2764  * Set or clear the multicast filter for this adaptor.
2765  */
2766 static void pcnet32_set_multicast_list(struct net_device *dev)
2767 {
2768         unsigned long ioaddr = dev->base_addr, flags;
2769         struct pcnet32_private *lp = netdev_priv(dev);
2770         int csr15, suspended;
2771
2772         spin_lock_irqsave(&lp->lock, flags);
2773         suspended = pcnet32_suspend(dev, &flags, 0);
2774         csr15 = lp->a.read_csr(ioaddr, CSR15);
2775         if (dev->flags & IFF_PROMISC) {
2776                 /* Log any net taps. */
2777                 if (netif_msg_hw(lp))
2778                         printk(KERN_INFO "%s: Promiscuous mode enabled.\n",
2779                                dev->name);
2780                 lp->init_block->mode =
2781                     cpu_to_le16(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) <<
2782                                 7);
2783                 lp->a.write_csr(ioaddr, CSR15, csr15 | 0x8000);
2784         } else {
2785                 lp->init_block->mode =
2786                     cpu_to_le16((lp->options & PCNET32_PORT_PORTSEL) << 7);
2787                 lp->a.write_csr(ioaddr, CSR15, csr15 & 0x7fff);
2788                 pcnet32_load_multicast(dev);
2789         }
2790
2791         if (suspended) {
2792                 int csr5;
2793                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
2794                 csr5 = lp->a.read_csr(ioaddr, CSR5);
2795                 lp->a.write_csr(ioaddr, CSR5, csr5 & (~CSR5_SUSPEND));
2796         } else {
2797                 lp->a.write_csr(ioaddr, CSR0, CSR0_STOP);
2798                 pcnet32_restart(dev, CSR0_NORMAL);
2799                 netif_wake_queue(dev);
2800         }
2801
2802         spin_unlock_irqrestore(&lp->lock, flags);
2803 }
2804
2805 /* This routine assumes that the lp->lock is held */
2806 static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
2807 {
2808         struct pcnet32_private *lp = netdev_priv(dev);
2809         unsigned long ioaddr = dev->base_addr;
2810         u16 val_out;
2811
2812         if (!lp->mii)
2813                 return 0;
2814
2815         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2816         val_out = lp->a.read_bcr(ioaddr, 34);
2817
2818         return val_out;
2819 }
2820
2821 /* This routine assumes that the lp->lock is held */
2822 static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
2823 {
2824         struct pcnet32_private *lp = netdev_priv(dev);
2825         unsigned long ioaddr = dev->base_addr;
2826
2827         if (!lp->mii)
2828                 return;
2829
2830         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2831         lp->a.write_bcr(ioaddr, 34, val);
2832 }
2833
2834 static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2835 {
2836         struct pcnet32_private *lp = netdev_priv(dev);
2837         int rc;
2838         unsigned long flags;
2839
2840         /* SIOC[GS]MIIxxx ioctls */
2841         if (lp->mii) {
2842                 spin_lock_irqsave(&lp->lock, flags);
2843                 rc = generic_mii_ioctl(&lp->mii_if, if_mii(rq), cmd, NULL);
2844                 spin_unlock_irqrestore(&lp->lock, flags);
2845         } else {
2846                 rc = -EOPNOTSUPP;
2847         }
2848
2849         return rc;
2850 }
2851
2852 static int pcnet32_check_otherphy(struct net_device *dev)
2853 {
2854         struct pcnet32_private *lp = netdev_priv(dev);
2855         struct mii_if_info mii = lp->mii_if;
2856         u16 bmcr;
2857         int i;
2858
2859         for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2860                 if (i == lp->mii_if.phy_id)
2861                         continue;       /* skip active phy */
2862                 if (lp->phymask & (1 << i)) {
2863                         mii.phy_id = i;
2864                         if (mii_link_ok(&mii)) {
2865                                 /* found PHY with active link */
2866                                 if (netif_msg_link(lp))
2867                                         printk(KERN_INFO
2868                                                "%s: Using PHY number %d.\n",
2869                                                dev->name, i);
2870
2871                                 /* isolate inactive phy */
2872                                 bmcr =
2873                                     mdio_read(dev, lp->mii_if.phy_id, MII_BMCR);
2874                                 mdio_write(dev, lp->mii_if.phy_id, MII_BMCR,
2875                                            bmcr | BMCR_ISOLATE);
2876
2877                                 /* de-isolate new phy */
2878                                 bmcr = mdio_read(dev, i, MII_BMCR);
2879                                 mdio_write(dev, i, MII_BMCR,
2880                                            bmcr & ~BMCR_ISOLATE);
2881
2882                                 /* set new phy address */
2883                                 lp->mii_if.phy_id = i;
2884                                 return 1;
2885                         }
2886                 }
2887         }
2888         return 0;
2889 }
2890
2891 /*
2892  * Show the status of the media.  Similar to mii_check_media however it
2893  * correctly shows the link speed for all (tested) pcnet32 variants.
2894  * Devices with no mii just report link state without speed.
2895  *
2896  * Caller is assumed to hold and release the lp->lock.
2897  */
2898
2899 static void pcnet32_check_media(struct net_device *dev, int verbose)
2900 {
2901         struct pcnet32_private *lp = netdev_priv(dev);
2902         int curr_link;
2903         int prev_link = netif_carrier_ok(dev) ? 1 : 0;
2904         u32 bcr9;
2905
2906         if (lp->mii) {
2907                 curr_link = mii_link_ok(&lp->mii_if);
2908         } else {
2909                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
2910                 curr_link = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
2911         }
2912         if (!curr_link) {
2913                 if (prev_link || verbose) {
2914                         netif_carrier_off(dev);
2915                         if (netif_msg_link(lp))
2916                                 printk(KERN_INFO "%s: link down\n", dev->name);
2917                 }
2918                 if (lp->phycount > 1) {
2919                         curr_link = pcnet32_check_otherphy(dev);
2920                         prev_link = 0;
2921                 }
2922         } else if (verbose || !prev_link) {
2923                 netif_carrier_on(dev);
2924                 if (lp->mii) {
2925                         if (netif_msg_link(lp)) {
2926                                 struct ethtool_cmd ecmd;
2927                                 mii_ethtool_gset(&lp->mii_if, &ecmd);
2928                                 printk(KERN_INFO
2929                                        "%s: link up, %sMbps, %s-duplex\n",
2930                                        dev->name,
2931                                        (ecmd.speed == SPEED_100) ? "100" : "10",
2932                                        (ecmd.duplex ==
2933                                         DUPLEX_FULL) ? "full" : "half");
2934                         }
2935                         bcr9 = lp->a.read_bcr(dev->base_addr, 9);
2936                         if ((bcr9 & (1 << 0)) != lp->mii_if.full_duplex) {
2937                                 if (lp->mii_if.full_duplex)
2938                                         bcr9 |= (1 << 0);
2939                                 else
2940                                         bcr9 &= ~(1 << 0);
2941                                 lp->a.write_bcr(dev->base_addr, 9, bcr9);
2942                         }
2943                 } else {
2944                         if (netif_msg_link(lp))
2945                                 printk(KERN_INFO "%s: link up\n", dev->name);
2946                 }
2947         }
2948 }
2949
2950 /*
2951  * Check for loss of link and link establishment.
2952  * Can not use mii_check_media because it does nothing if mode is forced.
2953  */
2954
2955 static void pcnet32_watchdog(struct net_device *dev)
2956 {
2957         struct pcnet32_private *lp = netdev_priv(dev);
2958         unsigned long flags;
2959
2960         /* Print the link status if it has changed */
2961         spin_lock_irqsave(&lp->lock, flags);
2962         pcnet32_check_media(dev, 0);
2963         spin_unlock_irqrestore(&lp->lock, flags);
2964
2965         mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
2966 }
2967
2968 static int pcnet32_pm_suspend(struct pci_dev *pdev, pm_message_t state)
2969 {
2970         struct net_device *dev = pci_get_drvdata(pdev);
2971
2972         if (netif_running(dev)) {
2973                 netif_device_detach(dev);
2974                 pcnet32_close(dev);
2975         }
2976         pci_save_state(pdev);
2977         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2978         return 0;
2979 }
2980
2981 static int pcnet32_pm_resume(struct pci_dev *pdev)
2982 {
2983         struct net_device *dev = pci_get_drvdata(pdev);
2984
2985         pci_set_power_state(pdev, PCI_D0);
2986         pci_restore_state(pdev);
2987
2988         if (netif_running(dev)) {
2989                 pcnet32_open(dev);
2990                 netif_device_attach(dev);
2991         }
2992         return 0;
2993 }
2994
2995 static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
2996 {
2997         struct net_device *dev = pci_get_drvdata(pdev);
2998
2999         if (dev) {
3000                 struct pcnet32_private *lp = netdev_priv(dev);
3001
3002                 unregister_netdev(dev);
3003                 pcnet32_free_ring(dev);
3004                 release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
3005                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
3006                                     lp->init_block, lp->init_dma_addr);
3007                 free_netdev(dev);
3008                 pci_disable_device(pdev);
3009                 pci_set_drvdata(pdev, NULL);
3010         }
3011 }
3012
3013 static struct pci_driver pcnet32_driver = {
3014         .name = DRV_NAME,
3015         .probe = pcnet32_probe_pci,
3016         .remove = __devexit_p(pcnet32_remove_one),
3017         .id_table = pcnet32_pci_tbl,
3018         .suspend = pcnet32_pm_suspend,
3019         .resume = pcnet32_pm_resume,
3020 };
3021
3022 /* An additional parameter that may be passed in... */
3023 static int debug = -1;
3024 static int tx_start_pt = -1;
3025 static int pcnet32_have_pci;
3026
3027 module_param(debug, int, 0);
3028 MODULE_PARM_DESC(debug, DRV_NAME " debug level");
3029 module_param(max_interrupt_work, int, 0);
3030 MODULE_PARM_DESC(max_interrupt_work,
3031                  DRV_NAME " maximum events handled per interrupt");
3032 module_param(rx_copybreak, int, 0);
3033 MODULE_PARM_DESC(rx_copybreak,
3034                  DRV_NAME " copy breakpoint for copy-only-tiny-frames");
3035 module_param(tx_start_pt, int, 0);
3036 MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
3037 module_param(pcnet32vlb, int, 0);
3038 MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support (0/1)");
3039 module_param_array(options, int, NULL, 0);
3040 MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
3041 module_param_array(full_duplex, int, NULL, 0);
3042 MODULE_PARM_DESC(full_duplex, DRV_NAME " full duplex setting(s) (1)");
3043 /* Module Parameter for HomePNA cards added by Patrick Simmons, 2004 */
3044 module_param_array(homepna, int, NULL, 0);
3045 MODULE_PARM_DESC(homepna,
3046                  DRV_NAME
3047                  " mode for 79C978 cards (1 for HomePNA, 0 for Ethernet, default Ethernet");
3048
3049 MODULE_AUTHOR("Thomas Bogendoerfer");
3050 MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
3051 MODULE_LICENSE("GPL");
3052
3053 #define PCNET32_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
3054
3055 static int __init pcnet32_init_module(void)
3056 {
3057         printk(KERN_INFO "%s", version);
3058
3059         pcnet32_debug = netif_msg_init(debug, PCNET32_MSG_DEFAULT);
3060
3061         if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
3062                 tx_start = tx_start_pt;
3063
3064         /* find the PCI devices */
3065         if (!pci_register_driver(&pcnet32_driver))
3066                 pcnet32_have_pci = 1;
3067
3068         /* should we find any remaining VLbus devices ? */
3069         if (pcnet32vlb)
3070                 pcnet32_probe_vlbus(pcnet32_portlist);
3071
3072         if (cards_found && (pcnet32_debug & NETIF_MSG_PROBE))
3073                 printk(KERN_INFO PFX "%d cards_found.\n", cards_found);
3074
3075         return (pcnet32_have_pci + cards_found) ? 0 : -ENODEV;
3076 }
3077
3078 static void __exit pcnet32_cleanup_module(void)
3079 {
3080         struct net_device *next_dev;
3081
3082         while (pcnet32_dev) {
3083                 struct pcnet32_private *lp = netdev_priv(pcnet32_dev);
3084                 next_dev = lp->next;
3085                 unregister_netdev(pcnet32_dev);
3086                 pcnet32_free_ring(pcnet32_dev);
3087                 release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
3088                 pci_free_consistent(lp->pci_dev, sizeof(*lp->init_block),
3089                                     lp->init_block, lp->init_dma_addr);
3090                 free_netdev(pcnet32_dev);
3091                 pcnet32_dev = next_dev;
3092         }
3093
3094         if (pcnet32_have_pci)
3095                 pci_unregister_driver(&pcnet32_driver);
3096 }
3097
3098 module_init(pcnet32_init_module);
3099 module_exit(pcnet32_cleanup_module);
3100
3101 /*
3102  * Local variables:
3103  *  c-indent-level: 4
3104  *  tab-width: 8
3105  * End:
3106  */