drivers/net/ethernet/ti/tlan.c

   1 /*******************************************************************************
   2  *
   3  *  Linux ThunderLAN Driver
   4  *
   5  *  tlan.c
   6  *  by James Banks
   7  *
   8  *  (C) 1997-1998 Caldera, Inc.
   9  *  (C) 1998 James Banks
  10  *  (C) 1999-2001 Torben Mathiasen
  11  *  (C) 2002 Samuel Chessman
  12  *
  13  *  This software may be used and distributed according to the terms
  14  *  of the GNU General Public License, incorporated herein by reference.
  15  *
  16  ** Useful (if not required) reading:
  17  *
  18  *              Texas Instruments, ThunderLAN Programmer's Guide,
  19  *                      TI Literature Number SPWU013A
  20  *                      available in PDF format from www.ti.com
  21  *              Level One, LXT901 and LXT970 Data Sheets
  22  *                      available in PDF format from www.level1.com
  23  *              National Semiconductor, DP83840A Data Sheet
  24  *                      available in PDF format from www.national.com
  25  *              Microchip Technology, 24C01A/02A/04A Data Sheet
  26  *                      available in PDF format from www.microchip.com
  27  *
  28  ******************************************************************************/
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #include <linux/hardirq.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/ioport.h>
  37 #include <linux/eisa.h>
  38 #include <linux/pci.h>
  39 #include <linux/dma-mapping.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/delay.h>
  43 #include <linux/spinlock.h>
  44 #include <linux/workqueue.h>
  45 #include <linux/mii.h>
  46
  47 #include "tlan.h"
  48
  49
  50 /* For removing EISA devices */
  51 static  struct net_device       *tlan_eisa_devices;
  52
  53 static  int             tlan_devices_installed;
  54
  55 /* Set speed, duplex and aui settings */
  56 static  int aui[MAX_TLAN_BOARDS];
  57 static  int duplex[MAX_TLAN_BOARDS];
  58 static  int speed[MAX_TLAN_BOARDS];
  59 static  int boards_found;
  60 module_param_array(aui, int, NULL, 0);
  61 module_param_array(duplex, int, NULL, 0);
  62 module_param_array(speed, int, NULL, 0);
  63 MODULE_PARM_DESC(aui, "ThunderLAN use AUI port(s) (0-1)");
  64 MODULE_PARM_DESC(duplex,
  65                  "ThunderLAN duplex setting(s) (0-default, 1-half, 2-full)");
  66 MODULE_PARM_DESC(speed, "ThunderLAN port speed setting(s) (0,10,100)");
  67
  68 MODULE_AUTHOR("Maintainer: Samuel Chessman <chessman@tux.org>");
  69 MODULE_DESCRIPTION("Driver for TI ThunderLAN based ethernet PCI adapters");
  70 MODULE_LICENSE("GPL");
  71
  72 /* Turn on debugging. See Documentation/networking/tlan.txt for details */
  73 static  int             debug;
  74 module_param(debug, int, 0);
  75 MODULE_PARM_DESC(debug, "ThunderLAN debug mask");
  76
  77 static  const char tlan_signature[] = "TLAN";
  78 static  const char tlan_banner[] = "ThunderLAN driver v1.17\n";
  79 static  int tlan_have_pci;
  80 static  int tlan_have_eisa;
  81
  82 static const char * const media[] = {
  83         "10BaseT-HD", "10BaseT-FD", "100baseTx-HD",
  84         "100BaseTx-FD", "100BaseT4", NULL
  85 };
  86
  87 static struct board {
  88         const char      *device_label;
  89         u32             flags;
  90         u16             addr_ofs;
  91 } board_info[] = {
  92         { "Compaq Netelligent 10 T PCI UTP", TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
  93         { "Compaq Netelligent 10/100 TX PCI UTP",
  94           TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
  95         { "Compaq Integrated NetFlex-3/P", TLAN_ADAPTER_NONE, 0x83 },
  96         { "Compaq NetFlex-3/P",
  97           TLAN_ADAPTER_UNMANAGED_PHY | TLAN_ADAPTER_BIT_RATE_PHY, 0x83 },
  98         { "Compaq NetFlex-3/P", TLAN_ADAPTER_NONE, 0x83 },
  99         { "Compaq Netelligent Integrated 10/100 TX UTP",
 100           TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
 101         { "Compaq Netelligent Dual 10/100 TX PCI UTP",
 102           TLAN_ADAPTER_NONE, 0x83 },
 103         { "Compaq Netelligent 10/100 TX Embedded UTP",
 104           TLAN_ADAPTER_NONE, 0x83 },
 105         { "Olicom OC-2183/2185", TLAN_ADAPTER_USE_INTERN_10, 0x83 },
 106         { "Olicom OC-2325", TLAN_ADAPTER_ACTIVITY_LED |
 107           TLAN_ADAPTER_UNMANAGED_PHY, 0xf8 },
 108         { "Olicom OC-2326", TLAN_ADAPTER_ACTIVITY_LED |
 109           TLAN_ADAPTER_USE_INTERN_10, 0xf8 },
 110         { "Compaq Netelligent 10/100 TX UTP", TLAN_ADAPTER_ACTIVITY_LED, 0x83 },
 111         { "Compaq Netelligent 10 T/2 PCI UTP/coax", TLAN_ADAPTER_NONE, 0x83 },
 112         { "Compaq NetFlex-3/E",
 113           TLAN_ADAPTER_ACTIVITY_LED |   /* EISA card */
 114           TLAN_ADAPTER_UNMANAGED_PHY | TLAN_ADAPTER_BIT_RATE_PHY, 0x83 },
 115         { "Compaq NetFlex-3/E",
 116           TLAN_ADAPTER_ACTIVITY_LED, 0x83 }, /* EISA card */
 117 };
 118
 119 static DEFINE_PCI_DEVICE_TABLE(tlan_pci_tbl) = {
 120         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL10,
 121           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 122         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100,
 123           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
 124         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETFLEX3I,
 125           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 },
 126         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_THUNDER,
 127           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 },
 128         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETFLEX3B,
 129           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
 130         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100PI,
 131           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 },
 132         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100D,
 133           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 },
 134         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_NETEL100I,
 135           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7 },
 136         { PCI_VENDOR_ID_OLICOM, PCI_DEVICE_ID_OLICOM_OC2183,
 137           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 },
 138         { PCI_VENDOR_ID_OLICOM, PCI_DEVICE_ID_OLICOM_OC2325,
 139           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9 },
 140         { PCI_VENDOR_ID_OLICOM, PCI_DEVICE_ID_OLICOM_OC2326,
 141           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10 },
 142         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_NETELLIGENT_10_100_WS_5100,
 143           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11 },
 144         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_NETELLIGENT_10_T2,
 145           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12 },
 146         { 0,}
 147 };
 148 MODULE_DEVICE_TABLE(pci, tlan_pci_tbl);
 149
 150 static void     tlan_eisa_probe(void);
 151 static void     tlan_eisa_cleanup(void);
 152 static int      tlan_init(struct net_device *);
 153 static int      tlan_open(struct net_device *dev);
 154 static netdev_tx_t tlan_start_tx(struct sk_buff *, struct net_device *);
 155 static irqreturn_t tlan_handle_interrupt(int, void *);
 156 static int      tlan_close(struct net_device *);
 157 static struct   net_device_stats *tlan_get_stats(struct net_device *);
 158 static void     tlan_set_multicast_list(struct net_device *);
 159 static int      tlan_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 160 static int      tlan_probe1(struct pci_dev *pdev, long ioaddr,
 161                             int irq, int rev, const struct pci_device_id *ent);
 162 static void     tlan_tx_timeout(struct net_device *dev);
 163 static void     tlan_tx_timeout_work(struct work_struct *work);
 164 static int      tlan_init_one(struct pci_dev *pdev,
 165                               const struct pci_device_id *ent);
 166
 167 static u32      tlan_handle_tx_eof(struct net_device *, u16);
 168 static u32      tlan_handle_stat_overflow(struct net_device *, u16);
 169 static u32      tlan_handle_rx_eof(struct net_device *, u16);
 170 static u32      tlan_handle_dummy(struct net_device *, u16);
 171 static u32      tlan_handle_tx_eoc(struct net_device *, u16);
 172 static u32      tlan_handle_status_check(struct net_device *, u16);
 173 static u32      tlan_handle_rx_eoc(struct net_device *, u16);
 174
 175 static void     tlan_timer(unsigned long);
 176
 177 static void     tlan_reset_lists(struct net_device *);
 178 static void     tlan_free_lists(struct net_device *);
 179 static void     tlan_print_dio(u16);
 180 static void     tlan_print_list(struct tlan_list *, char *, int);
 181 static void     tlan_read_and_clear_stats(struct net_device *, int);
 182 static void     tlan_reset_adapter(struct net_device *);
 183 static void     tlan_finish_reset(struct net_device *);
 184 static void     tlan_set_mac(struct net_device *, int areg, char *mac);
 185
 186 static void     tlan_phy_print(struct net_device *);
 187 static void     tlan_phy_detect(struct net_device *);
 188 static void     tlan_phy_power_down(struct net_device *);
 189 static void     tlan_phy_power_up(struct net_device *);
 190 static void     tlan_phy_reset(struct net_device *);
 191 static void     tlan_phy_start_link(struct net_device *);
 192 static void     tlan_phy_finish_auto_neg(struct net_device *);
 193 static void     tlan_phy_monitor(unsigned long);
 194
 195 /*
 196   static int    tlan_phy_nop(struct net_device *);
 197   static int    tlan_phy_internal_check(struct net_device *);
 198   static int    tlan_phy_internal_service(struct net_device *);
 199   static int    tlan_phy_dp83840a_check(struct net_device *);
 200 */
 201
 202 static bool     tlan_mii_read_reg(struct net_device *, u16, u16, u16 *);
 203 static void     tlan_mii_send_data(u16, u32, unsigned);
 204 static void     tlan_mii_sync(u16);
 205 static void     tlan_mii_write_reg(struct net_device *, u16, u16, u16);
 206
 207 static void     tlan_ee_send_start(u16);
 208 static int      tlan_ee_send_byte(u16, u8, int);
 209 static void     tlan_ee_receive_byte(u16, u8 *, int);
 210 static int      tlan_ee_read_byte(struct net_device *, u8, u8 *);
 211
 212
 213 static inline void
 214 tlan_store_skb(struct tlan_list *tag, struct sk_buff *skb)
 215 {
 216         unsigned long addr = (unsigned long)skb;
 217         tag->buffer[9].address = addr;
 218         tag->buffer[8].address = upper_32_bits(addr);
 219 }
 220
 221 static inline struct sk_buff *
 222 tlan_get_skb(const struct tlan_list *tag)
 223 {
 224         unsigned long addr;
 225
 226         addr = tag->buffer[9].address;
 227         addr |= ((unsigned long) tag->buffer[8].address << 16) << 16;
 228         return (struct sk_buff *) addr;
 229 }
 230
 231 static u32
 232 (*tlan_int_vector[TLAN_INT_NUMBER_OF_INTS])(struct net_device *, u16) = {
 233         NULL,
 234         tlan_handle_tx_eof,
 235         tlan_handle_stat_overflow,
 236         tlan_handle_rx_eof,
 237         tlan_handle_dummy,
 238         tlan_handle_tx_eoc,
 239         tlan_handle_status_check,
 240         tlan_handle_rx_eoc
 241 };
 242
 243 static inline void
 244 tlan_set_timer(struct net_device *dev, u32 ticks, u32 type)
 245 {
 246         struct tlan_priv *priv = netdev_priv(dev);
 247         unsigned long flags = 0;
 248
 249         if (!in_irq())
 250                 spin_lock_irqsave(&priv->lock, flags);
 251         if (priv->timer.function != NULL &&
 252             priv->timer_type != TLAN_TIMER_ACTIVITY) {
 253                 if (!in_irq())
 254                         spin_unlock_irqrestore(&priv->lock, flags);
 255                 return;
 256         }
 257         priv->timer.function = tlan_timer;
 258         if (!in_irq())
 259                 spin_unlock_irqrestore(&priv->lock, flags);
 260
 261         priv->timer.data = (unsigned long) dev;
 262         priv->timer_set_at = jiffies;
 263         priv->timer_type = type;
 264         mod_timer(&priv->timer, jiffies + ticks);
 265
 266 }
 267
 268
 269 /*****************************************************************************
 270 ******************************************************************************
 271
 272 ThunderLAN driver primary functions
 273
 274 these functions are more or less common to all linux network drivers.
 275
 276 ******************************************************************************
 277 *****************************************************************************/
 278
 279
 280
 281
 282
 283 /***************************************************************
 284  *      tlan_remove_one
 285  *
 286  *      Returns:
 287  *              Nothing
 288  *      Parms:
 289  *              None
 290  *
 291  *      Goes through the TLanDevices list and frees the device
 292  *      structs and memory associated with each device (lists
 293  *      and buffers).  It also ureserves the IO port regions
 294  *      associated with this device.
 295  *
 296  **************************************************************/
 297
 298
 299 static void tlan_remove_one(struct pci_dev *pdev)
 300 {
 301         struct net_device *dev = pci_get_drvdata(pdev);
 302         struct tlan_priv        *priv = netdev_priv(dev);
 303
 304         unregister_netdev(dev);
 305
 306         if (priv->dma_storage) {
 307                 pci_free_consistent(priv->pci_dev,
 308                                     priv->dma_size, priv->dma_storage,
 309                                     priv->dma_storage_dma);
 310         }
 311
 312 #ifdef CONFIG_PCI
 313         pci_release_regions(pdev);
 314 #endif
 315
 316         free_netdev(dev);
 317
 318         cancel_work_sync(&priv->tlan_tqueue);
 319 }
 320
 321 static void tlan_start(struct net_device *dev)
 322 {
 323         tlan_reset_lists(dev);
 324         /* NOTE: It might not be necessary to read the stats before a
 325            reset if you don't care what the values are.
 326         */
 327         tlan_read_and_clear_stats(dev, TLAN_IGNORE);
 328         tlan_reset_adapter(dev);
 329         netif_wake_queue(dev);
 330 }
 331
 332 static void tlan_stop(struct net_device *dev)
 333 {
 334         struct tlan_priv *priv = netdev_priv(dev);
 335
 336         del_timer_sync(&priv->media_timer);
 337         tlan_read_and_clear_stats(dev, TLAN_RECORD);
 338         outl(TLAN_HC_AD_RST, dev->base_addr + TLAN_HOST_CMD);
 339         /* Reset and power down phy */
 340         tlan_reset_adapter(dev);
 341         if (priv->timer.function != NULL) {
 342                 del_timer_sync(&priv->timer);
 343                 priv->timer.function = NULL;
 344         }
 345 }
 346
 347 #ifdef CONFIG_PM
 348
 349 static int tlan_suspend(struct pci_dev *pdev, pm_message_t state)
 350 {
 351         struct net_device *dev = pci_get_drvdata(pdev);
 352
 353         if (netif_running(dev))
 354                 tlan_stop(dev);
 355
 356         netif_device_detach(dev);
 357         pci_save_state(pdev);
 358         pci_disable_device(pdev);
 359         pci_wake_from_d3(pdev, false);
 360         pci_set_power_state(pdev, PCI_D3hot);
 361
 362         return 0;
 363 }
 364
 365 static int tlan_resume(struct pci_dev *pdev)
 366 {
 367         struct net_device *dev = pci_get_drvdata(pdev);
 368
 369         pci_set_power_state(pdev, PCI_D0);
 370         pci_restore_state(pdev);
 371         pci_enable_wake(pdev, PCI_D0, 0);
 372         netif_device_attach(dev);
 373
 374         if (netif_running(dev))
 375                 tlan_start(dev);
 376
 377         return 0;
 378 }
 379
 380 #else /* CONFIG_PM */
 381
 382 #define tlan_suspend   NULL
 383 #define tlan_resume    NULL
 384
 385 #endif /* CONFIG_PM */
 386
 387
 388 static struct pci_driver tlan_driver = {
 389         .name           = "tlan",
 390         .id_table       = tlan_pci_tbl,
 391         .probe          = tlan_init_one,
 392         .remove         = tlan_remove_one,
 393         .suspend        = tlan_suspend,
 394         .resume         = tlan_resume,
 395 };
 396
 397 static int __init tlan_probe(void)
 398 {
 399         int rc = -ENODEV;
 400
 401         pr_info("%s", tlan_banner);
 402
 403         TLAN_DBG(TLAN_DEBUG_PROBE, "Starting PCI Probe....\n");
 404
 405         /* Use new style PCI probing. Now the kernel will
 406            do most of this for us */
 407         rc = pci_register_driver(&tlan_driver);
 408
 409         if (rc != 0) {
 410                 pr_err("Could not register pci driver\n");
 411                 goto err_out_pci_free;
 412         }
 413
 414         TLAN_DBG(TLAN_DEBUG_PROBE, "Starting EISA Probe....\n");
 415         tlan_eisa_probe();
 416
 417         pr_info("%d device%s installed, PCI: %d  EISA: %d\n",
 418                 tlan_devices_installed, tlan_devices_installed == 1 ? "" : "s",
 419                 tlan_have_pci, tlan_have_eisa);
 420
 421         if (tlan_devices_installed == 0) {
 422                 rc = -ENODEV;
 423                 goto  err_out_pci_unreg;
 424         }
 425         return 0;
 426
 427 err_out_pci_unreg:
 428         pci_unregister_driver(&tlan_driver);
 429 err_out_pci_free:
 430         return rc;
 431 }
 432
 433
 434 static int tlan_init_one(struct pci_dev *pdev,
 435                                    const struct pci_device_id *ent)
 436 {
 437         return tlan_probe1(pdev, -1, -1, 0, ent);
 438 }
 439
 440
 441 /*
 442 ***************************************************************
 443 *       tlan_probe1
 444 *
 445 *       Returns:
 446 *               0 on success, error code on error
 447 *       Parms:
 448 *               none
 449 *
 450 *       The name is lower case to fit in with all the rest of
 451 *       the netcard_probe names.  This function looks for
 452 *       another TLan based adapter, setting it up with the
 453 *       allocated device struct if one is found.
 454 *       tlan_probe has been ported to the new net API and
 455 *       now allocates its own device structure. This function
 456 *       is also used by modules.
 457 *
 458 **************************************************************/
 459
 460 static int tlan_probe1(struct pci_dev *pdev, long ioaddr, int irq, int rev,
 461                        const struct pci_device_id *ent)
 462 {
 463
 464         struct net_device  *dev;
 465         struct tlan_priv  *priv;
 466         u16                device_id;
 467         int                reg, rc = -ENODEV;
 468
 469 #ifdef CONFIG_PCI
 470         if (pdev) {
 471                 rc = pci_enable_device(pdev);
 472                 if (rc)
 473                         return rc;
 474
 475                 rc = pci_request_regions(pdev, tlan_signature);
 476                 if (rc) {
 477                         pr_err("Could not reserve IO regions\n");
 478                         goto err_out;
 479                 }
 480         }
 481 #endif  /*  CONFIG_PCI  */
 482
 483         dev = alloc_etherdev(sizeof(struct tlan_priv));
 484         if (dev == NULL) {
 485                 rc = -ENOMEM;
 486                 goto err_out_regions;
 487         }
 488         SET_NETDEV_DEV(dev, &pdev->dev);
 489
 490         priv = netdev_priv(dev);
 491
 492         priv->pci_dev = pdev;
 493         priv->dev = dev;
 494
 495         /* Is this a PCI device? */
 496         if (pdev) {
 497                 u32                pci_io_base = 0;
 498
 499                 priv->adapter = &board_info[ent->driver_data];
 500
 501                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 502                 if (rc) {
 503                         pr_err("No suitable PCI mapping available\n");
 504                         goto err_out_free_dev;
 505                 }
 506
 507                 for (reg = 0; reg <= 5; reg++) {
 508                         if (pci_resource_flags(pdev, reg) & IORESOURCE_IO) {
 509                                 pci_io_base = pci_resource_start(pdev, reg);
 510                                 TLAN_DBG(TLAN_DEBUG_GNRL,
 511                                          "IO mapping is available at %x.\n",
 512                                          pci_io_base);
 513                                 break;
 514                         }
 515                 }
 516                 if (!pci_io_base) {
 517                         pr_err("No IO mappings available\n");
 518                         rc = -EIO;
 519                         goto err_out_free_dev;
 520                 }
 521
 522                 dev->base_addr = pci_io_base;
 523                 dev->irq = pdev->irq;
 524                 priv->adapter_rev = pdev->revision;
 525                 pci_set_master(pdev);
 526                 pci_set_drvdata(pdev, dev);
 527
 528         } else  {     /* EISA card */
 529                 /* This is a hack. We need to know which board structure
 530                  * is suited for this adapter */
 531                 device_id = inw(ioaddr + EISA_ID2);
 532                 if (device_id == 0x20F1) {
 533                         priv->adapter = &board_info[13]; /* NetFlex-3/E */
 534                         priv->adapter_rev = 23;         /* TLAN 2.3 */
 535                 } else {
 536                         priv->adapter = &board_info[14];
 537                         priv->adapter_rev = 10;         /* TLAN 1.0 */
 538                 }
 539                 dev->base_addr = ioaddr;
 540                 dev->irq = irq;
 541         }
 542
 543         /* Kernel parameters */
 544         if (dev->mem_start) {
 545                 priv->aui    = dev->mem_start & 0x01;
 546                 priv->duplex = ((dev->mem_start & 0x06) == 0x06) ? 0
 547                         : (dev->mem_start & 0x06) >> 1;
 548                 priv->speed  = ((dev->mem_start & 0x18) == 0x18) ? 0
 549                         : (dev->mem_start & 0x18) >> 3;
 550
 551                 if (priv->speed == 0x1)
 552                         priv->speed = TLAN_SPEED_10;
 553                 else if (priv->speed == 0x2)
 554                         priv->speed = TLAN_SPEED_100;
 555
 556                 debug = priv->debug = dev->mem_end;
 557         } else {
 558                 priv->aui    = aui[boards_found];
 559                 priv->speed  = speed[boards_found];
 560                 priv->duplex = duplex[boards_found];
 561                 priv->debug = debug;
 562         }
 563
 564         /* This will be used when we get an adapter error from
 565          * within our irq handler */
 566         INIT_WORK(&priv->tlan_tqueue, tlan_tx_timeout_work);
 567
 568         spin_lock_init(&priv->lock);
 569
 570         rc = tlan_init(dev);
 571         if (rc) {
 572                 pr_err("Could not set up device\n");
 573                 goto err_out_free_dev;
 574         }
 575
 576         rc = register_netdev(dev);
 577         if (rc) {
 578                 pr_err("Could not register device\n");
 579                 goto err_out_uninit;
 580         }
 581
 582
 583         tlan_devices_installed++;
 584         boards_found++;
 585
 586         /* pdev is NULL if this is an EISA device */
 587         if (pdev)
 588                 tlan_have_pci++;
 589         else {
 590                 priv->next_device = tlan_eisa_devices;
 591                 tlan_eisa_devices = dev;
 592                 tlan_have_eisa++;
 593         }
 594
 595         netdev_info(dev, "irq=%2d, io=%04x, %s, Rev. %d\n",
 596                     (int)dev->irq,
 597                     (int)dev->base_addr,
 598                     priv->adapter->device_label,
 599                     priv->adapter_rev);
 600         return 0;
 601
 602 err_out_uninit:
 603         pci_free_consistent(priv->pci_dev, priv->dma_size, priv->dma_storage,
 604                             priv->dma_storage_dma);
 605 err_out_free_dev:
 606         free_netdev(dev);
 607 err_out_regions:
 608 #ifdef CONFIG_PCI
 609         if (pdev)
 610                 pci_release_regions(pdev);
 611 #endif
 612 err_out:
 613         if (pdev)
 614                 pci_disable_device(pdev);
 615         return rc;
 616 }
 617
 618
 619 static void tlan_eisa_cleanup(void)
 620 {
 621         struct net_device *dev;
 622         struct tlan_priv *priv;
 623
 624         while (tlan_have_eisa) {
 625                 dev = tlan_eisa_devices;
 626                 priv = netdev_priv(dev);
 627                 if (priv->dma_storage) {
 628                         pci_free_consistent(priv->pci_dev, priv->dma_size,
 629                                             priv->dma_storage,
 630                                             priv->dma_storage_dma);
 631                 }
 632                 release_region(dev->base_addr, 0x10);
 633                 unregister_netdev(dev);
 634                 tlan_eisa_devices = priv->next_device;
 635                 free_netdev(dev);
 636                 tlan_have_eisa--;
 637         }
 638 }
 639
 640
 641 static void __exit tlan_exit(void)
 642 {
 643         pci_unregister_driver(&tlan_driver);
 644
 645         if (tlan_have_eisa)
 646                 tlan_eisa_cleanup();
 647
 648 }
 649
 650
 651 /* Module loading/unloading */
 652 module_init(tlan_probe);
 653 module_exit(tlan_exit);
 654
 655
 656
 657 /**************************************************************
 658  *      tlan_eisa_probe
 659  *
 660  *      Returns: 0 on success, 1 otherwise
 661  *
 662  *      Parms:   None
 663  *
 664  *
 665  *      This functions probes for EISA devices and calls
 666  *      TLan_probe1 when one is found.
 667  *
 668  *************************************************************/
 669
 670 static void  __init tlan_eisa_probe(void)
 671 {
 672         long    ioaddr;
 673         int     rc = -ENODEV;
 674         int     irq;
 675         u16     device_id;
 676
 677         if (!EISA_bus) {
 678                 TLAN_DBG(TLAN_DEBUG_PROBE, "No EISA bus present\n");
 679                 return;
 680         }
 681
 682         /* Loop through all slots of the EISA bus */
 683         for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
 684
 685                 TLAN_DBG(TLAN_DEBUG_PROBE, "EISA_ID 0x%4x: 0x%4x\n",
 686                          (int) ioaddr + 0xc80, inw(ioaddr + EISA_ID));
 687                 TLAN_DBG(TLAN_DEBUG_PROBE, "EISA_ID 0x%4x: 0x%4x\n",
 688                          (int) ioaddr + 0xc82, inw(ioaddr + EISA_ID2));
 689
 690
 691                 TLAN_DBG(TLAN_DEBUG_PROBE,
 692                          "Probing for EISA adapter at IO: 0x%4x : ",
 693                          (int) ioaddr);
 694                 if (request_region(ioaddr, 0x10, tlan_signature) == NULL)
 695                         goto out;
 696
 697                 if (inw(ioaddr + EISA_ID) != 0x110E) {
 698                         release_region(ioaddr, 0x10);
 699                         goto out;
 700                 }
 701
 702                 device_id = inw(ioaddr + EISA_ID2);
 703                 if (device_id !=  0x20F1 && device_id != 0x40F1) {
 704                         release_region(ioaddr, 0x10);
 705                         goto out;
 706                 }
 707
 708                 /* check if adapter is enabled */
 709                 if (inb(ioaddr + EISA_CR) != 0x1) {
 710                         release_region(ioaddr, 0x10);
 711                         goto out2;
 712                 }
 713
 714                 if (debug == 0x10)
 715                         pr_info("Found one\n");
 716
 717
 718                 /* Get irq from board */
 719                 switch (inb(ioaddr + 0xcc0)) {
 720                 case(0x10):
 721                         irq = 5;
 722                         break;
 723                 case(0x20):
 724                         irq = 9;
 725                         break;
 726                 case(0x40):
 727                         irq = 10;
 728                         break;
 729                 case(0x80):
 730                         irq = 11;
 731                         break;
 732                 default:
 733                         goto out;
 734                 }
 735
 736
 737                 /* Setup the newly found eisa adapter */
 738                 rc = tlan_probe1(NULL, ioaddr, irq,
 739                                  12, NULL);
 740                 continue;
 741
 742 out:
 743                 if (debug == 0x10)
 744                         pr_info("None found\n");
 745                 continue;
 746
 747 out2:
 748                 if (debug == 0x10)
 749                         pr_info("Card found but it is not enabled, skipping\n");
 750                 continue;
 751
 752         }
 753
 754 }
 755
 756 #ifdef CONFIG_NET_POLL_CONTROLLER
 757 static void tlan_poll(struct net_device *dev)
 758 {
 759         disable_irq(dev->irq);
 760         tlan_handle_interrupt(dev->irq, dev);
 761         enable_irq(dev->irq);
 762 }
 763 #endif
 764
 765 static const struct net_device_ops tlan_netdev_ops = {
 766         .ndo_open               = tlan_open,
 767         .ndo_stop               = tlan_close,
 768         .ndo_start_xmit         = tlan_start_tx,
 769         .ndo_tx_timeout         = tlan_tx_timeout,
 770         .ndo_get_stats          = tlan_get_stats,
 771         .ndo_set_rx_mode        = tlan_set_multicast_list,
 772         .ndo_do_ioctl           = tlan_ioctl,
 773         .ndo_change_mtu         = eth_change_mtu,
 774         .ndo_set_mac_address    = eth_mac_addr,
 775         .ndo_validate_addr      = eth_validate_addr,
 776 #ifdef CONFIG_NET_POLL_CONTROLLER
 777         .ndo_poll_controller     = tlan_poll,
 778 #endif
 779 };
 780
 781 static void tlan_get_drvinfo(struct net_device *dev,
 782                              struct ethtool_drvinfo *info)
 783 {
 784         struct tlan_priv *priv = netdev_priv(dev);
 785
 786         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 787         if (priv->pci_dev)
 788                 strlcpy(info->bus_info, pci_name(priv->pci_dev),
 789                         sizeof(info->bus_info));
 790         else
 791                 strlcpy(info->bus_info, "EISA", sizeof(info->bus_info));
 792         info->eedump_len = TLAN_EEPROM_SIZE;
 793 }
 794
 795 static int tlan_get_eeprom_len(struct net_device *dev)
 796 {
 797         return TLAN_EEPROM_SIZE;
 798 }
 799
 800 static int tlan_get_eeprom(struct net_device *dev,
 801                            struct ethtool_eeprom *eeprom, u8 *data)
 802 {
 803         int i;
 804
 805         for (i = 0; i < TLAN_EEPROM_SIZE; i++)
 806                 if (tlan_ee_read_byte(dev, i, &data[i]))
 807                         return -EIO;
 808
 809         return 0;
 810 }
 811
 812 static const struct ethtool_ops tlan_ethtool_ops = {
 813         .get_drvinfo    = tlan_get_drvinfo,
 814         .get_link       = ethtool_op_get_link,
 815         .get_eeprom_len = tlan_get_eeprom_len,
 816         .get_eeprom     = tlan_get_eeprom,
 817 };
 818
 819 /***************************************************************
 820  *      tlan_init
 821  *
 822  *      Returns:
 823  *              0 on success, error code otherwise.
 824  *      Parms:
 825  *              dev     The structure of the device to be
 826  *                      init'ed.
 827  *
 828  *      This function completes the initialization of the
 829  *      device structure and driver.  It reserves the IO
 830  *      addresses, allocates memory for the lists and bounce
 831  *      buffers, retrieves the MAC address from the eeprom
 832  *      and assignes the device's methods.
 833  *
 834  **************************************************************/
 835
 836 static int tlan_init(struct net_device *dev)
 837 {
 838         int             dma_size;
 839         int             err;
 840         int             i;
 841         struct tlan_priv        *priv;
 842
 843         priv = netdev_priv(dev);
 844
 845         dma_size = (TLAN_NUM_RX_LISTS + TLAN_NUM_TX_LISTS)
 846                 * (sizeof(struct tlan_list));
 847         priv->dma_storage = pci_alloc_consistent(priv->pci_dev,
 848                                                  dma_size,
 849                                                  &priv->dma_storage_dma);
 850         priv->dma_size = dma_size;
 851
 852         if (priv->dma_storage == NULL) {
 853                 pr_err("Could not allocate lists and buffers for %s\n",
 854                        dev->name);
 855                 return -ENOMEM;
 856         }
 857         memset(priv->dma_storage, 0, dma_size);
 858         priv->rx_list = (struct tlan_list *)
 859                 ALIGN((unsigned long)priv->dma_storage, 8);
 860         priv->rx_list_dma = ALIGN(priv->dma_storage_dma, 8);
 861         priv->tx_list = priv->rx_list + TLAN_NUM_RX_LISTS;
 862         priv->tx_list_dma =
 863                 priv->rx_list_dma + sizeof(struct tlan_list)*TLAN_NUM_RX_LISTS;
 864
 865         err = 0;
 866         for (i = 0; i < ETH_ALEN; i++)
 867                 err |= tlan_ee_read_byte(dev,
 868                                          (u8) priv->adapter->addr_ofs + i,
 869                                          (u8 *) &dev->dev_addr[i]);
 870         if (err) {
 871                 pr_err("%s: Error reading MAC from eeprom: %d\n",
 872                        dev->name, err);
 873         }
 874         /* Olicom OC-2325/OC-2326 have the address byte-swapped */
 875         if (priv->adapter->addr_ofs == 0xf8) {
 876                 for (i = 0; i < ETH_ALEN; i += 2) {
 877                         char tmp = dev->dev_addr[i];
 878                         dev->dev_addr[i] = dev->dev_addr[i + 1];
 879                         dev->dev_addr[i + 1] = tmp;
 880                 }
 881         }
 882
 883         netif_carrier_off(dev);
 884
 885         /* Device methods */
 886         dev->netdev_ops = &tlan_netdev_ops;
 887         dev->ethtool_ops = &tlan_ethtool_ops;
 888         dev->watchdog_timeo = TX_TIMEOUT;
 889
 890         return 0;
 891
 892 }
 893
 894
 895
 896
 897 /***************************************************************
 898  *      tlan_open
 899  *
 900  *      Returns:
 901  *              0 on success, error code otherwise.
 902  *      Parms:
 903  *              dev     Structure of device to be opened.
 904  *
 905  *      This routine puts the driver and TLAN adapter in a
 906  *      state where it is ready to send and receive packets.
 907  *      It allocates the IRQ, resets and brings the adapter
 908  *      out of reset, and allows interrupts.  It also delays
 909  *      the startup for autonegotiation or sends a Rx GO
 910  *      command to the adapter, as appropriate.
 911  *
 912  **************************************************************/
 913
 914 static int tlan_open(struct net_device *dev)
 915 {
 916         struct tlan_priv        *priv = netdev_priv(dev);
 917         int             err;
 918
 919         priv->tlan_rev = tlan_dio_read8(dev->base_addr, TLAN_DEF_REVISION);
 920         err = request_irq(dev->irq, tlan_handle_interrupt, IRQF_SHARED,
 921                           dev->name, dev);
 922
 923         if (err) {
 924                 netdev_err(dev, "Cannot open because IRQ %d is already in use\n",
 925                            dev->irq);
 926                 return err;
 927         }
 928
 929         init_timer(&priv->timer);
 930         init_timer(&priv->media_timer);
 931
 932         tlan_start(dev);
 933
 934         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Opened.  TLAN Chip Rev: %x\n",
 935                  dev->name, priv->tlan_rev);
 936
 937         return 0;
 938
 939 }
 940
 941
 942
 943 /**************************************************************
 944  *      tlan_ioctl
 945  *
 946  *      Returns:
 947  *              0 on success, error code otherwise
 948  *      Params:
 949  *              dev     structure of device to receive ioctl.
 950  *
 951  *              rq      ifreq structure to hold userspace data.
 952  *
 953  *              cmd     ioctl command.
 954  *
 955  *
 956  *************************************************************/
 957
 958 static int tlan_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 959 {
 960         struct tlan_priv *priv = netdev_priv(dev);
 961         struct mii_ioctl_data *data = if_mii(rq);
 962         u32 phy   = priv->phy[priv->phy_num];
 963
 964         if (!priv->phy_online)
 965                 return -EAGAIN;
 966
 967         switch (cmd) {
 968         case SIOCGMIIPHY:               /* get address of MII PHY in use. */
 969                 data->phy_id = phy;
 970
 971
 972         case SIOCGMIIREG:               /* read MII PHY register. */
 973                 tlan_mii_read_reg(dev, data->phy_id & 0x1f,
 974                                   data->reg_num & 0x1f, &data->val_out);
 975                 return 0;
 976
 977
 978         case SIOCSMIIREG:               /* write MII PHY register. */
 979                 tlan_mii_write_reg(dev, data->phy_id & 0x1f,
 980                                    data->reg_num & 0x1f, data->val_in);
 981                 return 0;
 982         default:
 983                 return -EOPNOTSUPP;
 984         }
 985 }
 986
 987
 988 /***************************************************************
 989  *      tlan_tx_timeout
 990  *
 991  *      Returns: nothing
 992  *
 993  *      Params:
 994  *              dev     structure of device which timed out
 995  *                      during transmit.
 996  *
 997  **************************************************************/
 998
 999 static void tlan_tx_timeout(struct net_device *dev)
1000 {
1001
1002         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Transmit timed out.\n", dev->name);
1003
1004         /* Ok so we timed out, lets see what we can do about it...*/
1005         tlan_free_lists(dev);
1006         tlan_reset_lists(dev);
1007         tlan_read_and_clear_stats(dev, TLAN_IGNORE);
1008         tlan_reset_adapter(dev);
1009         dev->trans_start = jiffies; /* prevent tx timeout */
1010         netif_wake_queue(dev);
1011
1012 }
1013
1014
1015 /***************************************************************
1016  *      tlan_tx_timeout_work
1017  *
1018  *      Returns: nothing
1019  *
1020  *      Params:
1021  *              work    work item of device which timed out
1022  *
1023  **************************************************************/
1024
1025 static void tlan_tx_timeout_work(struct work_struct *work)
1026 {
1027         struct tlan_priv        *priv =
1028                 container_of(work, struct tlan_priv, tlan_tqueue);
1029
1030         tlan_tx_timeout(priv->dev);
1031 }
1032
1033
1034
1035 /***************************************************************
1036  *      tlan_start_tx
1037  *
1038  *      Returns:
1039  *              0 on success, non-zero on failure.
1040  *      Parms:
1041  *              skb     A pointer to the sk_buff containing the
1042  *                      frame to be sent.
1043  *              dev     The device to send the data on.
1044  *
1045  *      This function adds a frame to the Tx list to be sent
1046  *      ASAP.  First it verifies that the adapter is ready and
1047  *      there is room in the queue.  Then it sets up the next
1048  *      available list, copies the frame to the corresponding
1049  *      buffer.  If the adapter Tx channel is idle, it gives
1050  *      the adapter a Tx Go command on the list, otherwise it
1051  *      sets the forward address of the previous list to point
1052  *      to this one.  Then it frees the sk_buff.
1053  *
1054  **************************************************************/
1055
1056 static netdev_tx_t tlan_start_tx(struct sk_buff *skb, struct net_device *dev)
1057 {
1058         struct tlan_priv *priv = netdev_priv(dev);
1059         dma_addr_t      tail_list_phys;
1060         struct tlan_list        *tail_list;
1061         unsigned long   flags;
1062         unsigned int    txlen;
1063
1064         if (!priv->phy_online) {
1065                 TLAN_DBG(TLAN_DEBUG_TX, "TRANSMIT:  %s PHY is not ready\n",
1066                          dev->name);
1067                 dev_kfree_skb_any(skb);
1068                 return NETDEV_TX_OK;
1069         }
1070
1071         if (skb_padto(skb, TLAN_MIN_FRAME_SIZE))
1072                 return NETDEV_TX_OK;
1073         txlen = max(skb->len, (unsigned int)TLAN_MIN_FRAME_SIZE);
1074
1075         tail_list = priv->tx_list + priv->tx_tail;
1076         tail_list_phys =
1077                 priv->tx_list_dma + sizeof(struct tlan_list)*priv->tx_tail;
1078
1079         if (tail_list->c_stat != TLAN_CSTAT_UNUSED) {
1080                 TLAN_DBG(TLAN_DEBUG_TX,
1081                          "TRANSMIT:  %s is busy (Head=%d Tail=%d)\n",
1082                          dev->name, priv->tx_head, priv->tx_tail);
1083                 netif_stop_queue(dev);
1084                 priv->tx_busy_count++;
1085                 return NETDEV_TX_BUSY;
1086         }
1087
1088         tail_list->forward = 0;
1089
1090         tail_list->buffer[0].address = pci_map_single(priv->pci_dev,
1091                                                       skb->data, txlen,
1092                                                       PCI_DMA_TODEVICE);
1093         tlan_store_skb(tail_list, skb);
1094
1095         tail_list->frame_size = (u16) txlen;
1096         tail_list->buffer[0].count = TLAN_LAST_BUFFER | (u32) txlen;
1097         tail_list->buffer[1].count = 0;
1098         tail_list->buffer[1].address = 0;
1099
1100         spin_lock_irqsave(&priv->lock, flags);
1101         tail_list->c_stat = TLAN_CSTAT_READY;
1102         if (!priv->tx_in_progress) {
1103                 priv->tx_in_progress = 1;
1104                 TLAN_DBG(TLAN_DEBUG_TX,
1105                          "TRANSMIT:  Starting TX on buffer %d\n",
1106                          priv->tx_tail);
1107                 outl(tail_list_phys, dev->base_addr + TLAN_CH_PARM);
1108                 outl(TLAN_HC_GO, dev->base_addr + TLAN_HOST_CMD);
1109         } else {
1110                 TLAN_DBG(TLAN_DEBUG_TX,
1111                          "TRANSMIT:  Adding buffer %d to TX channel\n",
1112                          priv->tx_tail);
1113                 if (priv->tx_tail == 0) {
1114                         (priv->tx_list + (TLAN_NUM_TX_LISTS - 1))->forward
1115                                 = tail_list_phys;
1116                 } else {
1117                         (priv->tx_list + (priv->tx_tail - 1))->forward
1118                                 = tail_list_phys;
1119                 }
1120         }
1121         spin_unlock_irqrestore(&priv->lock, flags);
1122
1123         CIRC_INC(priv->tx_tail, TLAN_NUM_TX_LISTS);
1124
1125         return NETDEV_TX_OK;
1126
1127 }
1128
1129
1130
1131
1132 /***************************************************************
1133  *      tlan_handle_interrupt
1134  *
1135  *      Returns:
1136  *              Nothing
1137  *      Parms:
1138  *              irq     The line on which the interrupt
1139  *                      occurred.
1140  *              dev_id  A pointer to the device assigned to
1141  *                      this irq line.
1142  *
1143  *      This function handles an interrupt generated by its
1144  *      assigned TLAN adapter.  The function deactivates
1145  *      interrupts on its adapter, records the type of
1146  *      interrupt, executes the appropriate subhandler, and
1147  *      acknowdges the interrupt to the adapter (thus
1148  *      re-enabling adapter interrupts.
1149  *
1150  **************************************************************/
1151
1152 static irqreturn_t tlan_handle_interrupt(int irq, void *dev_id)
1153 {
1154         struct net_device       *dev = dev_id;
1155         struct tlan_priv *priv = netdev_priv(dev);
1156         u16             host_int;
1157         u16             type;
1158
1159         spin_lock(&priv->lock);
1160
1161         host_int = inw(dev->base_addr + TLAN_HOST_INT);
1162         type = (host_int & TLAN_HI_IT_MASK) >> 2;
1163         if (type) {
1164                 u32     ack;
1165                 u32     host_cmd;
1166
1167                 outw(host_int, dev->base_addr + TLAN_HOST_INT);
1168                 ack = tlan_int_vector[type](dev, host_int);
1169
1170                 if (ack) {
1171                         host_cmd = TLAN_HC_ACK | ack | (type << 18);
1172                         outl(host_cmd, dev->base_addr + TLAN_HOST_CMD);
1173                 }
1174         }
1175
1176         spin_unlock(&priv->lock);
1177
1178         return IRQ_RETVAL(type);
1179 }
1180
1181
1182
1183
1184 /***************************************************************
1185  *      tlan_close
1186  *
1187  *      Returns:
1188  *              An error code.
1189  *      Parms:
1190  *              dev     The device structure of the device to
1191  *                      close.
1192  *
1193  *      This function shuts down the adapter.  It records any
1194  *      stats, puts the adapter into reset state, deactivates
1195  *      its time as needed, and frees the irq it is using.
1196  *
1197  **************************************************************/
1198
1199 static int tlan_close(struct net_device *dev)
1200 {
1201         struct tlan_priv *priv = netdev_priv(dev);
1202
1203         priv->neg_be_verbose = 0;
1204         tlan_stop(dev);
1205
1206         free_irq(dev->irq, dev);
1207         tlan_free_lists(dev);
1208         TLAN_DBG(TLAN_DEBUG_GNRL, "Device %s closed.\n", dev->name);
1209
1210         return 0;
1211
1212 }
1213
1214
1215
1216
1217 /***************************************************************
1218  *      tlan_get_stats
1219  *
1220  *      Returns:
1221  *              A pointer to the device's statistics structure.
1222  *      Parms:
1223  *              dev     The device structure to return the
1224  *                      stats for.
1225  *
1226  *      This function updates the devices statistics by reading
1227  *      the TLAN chip's onboard registers.  Then it returns the
1228  *      address of the statistics structure.
1229  *
1230  **************************************************************/
1231
1232 static struct net_device_stats *tlan_get_stats(struct net_device *dev)
1233 {
1234         struct tlan_priv        *priv = netdev_priv(dev);
1235         int i;
1236
1237         /* Should only read stats if open ? */
1238         tlan_read_and_clear_stats(dev, TLAN_RECORD);
1239
1240         TLAN_DBG(TLAN_DEBUG_RX, "RECEIVE:  %s EOC count = %d\n", dev->name,
1241                  priv->rx_eoc_count);
1242         TLAN_DBG(TLAN_DEBUG_TX, "TRANSMIT:  %s Busy count = %d\n", dev->name,
1243                  priv->tx_busy_count);
1244         if (debug & TLAN_DEBUG_GNRL) {
1245                 tlan_print_dio(dev->base_addr);
1246                 tlan_phy_print(dev);
1247         }
1248         if (debug & TLAN_DEBUG_LIST) {
1249                 for (i = 0; i < TLAN_NUM_RX_LISTS; i++)
1250                         tlan_print_list(priv->rx_list + i, "RX", i);
1251                 for (i = 0; i < TLAN_NUM_TX_LISTS; i++)
1252                         tlan_print_list(priv->tx_list + i, "TX", i);
1253         }
1254
1255         return &dev->stats;
1256
1257 }
1258
1259
1260
1261
1262 /***************************************************************
1263  *      tlan_set_multicast_list
1264  *
1265  *      Returns:
1266  *              Nothing
1267  *      Parms:
1268  *              dev     The device structure to set the
1269  *                      multicast list for.
1270  *
1271  *      This function sets the TLAN adaptor to various receive
1272  *      modes.  If the IFF_PROMISC flag is set, promiscuous
1273  *      mode is acitviated.  Otherwise, promiscuous mode is
1274  *      turned off.  If the IFF_ALLMULTI flag is set, then
1275  *      the hash table is set to receive all group addresses.
1276  *      Otherwise, the first three multicast addresses are
1277  *      stored in AREG_1-3, and the rest are selected via the
1278  *      hash table, as necessary.
1279  *
1280  **************************************************************/
1281
1282 static void tlan_set_multicast_list(struct net_device *dev)
1283 {
1284         struct netdev_hw_addr *ha;
1285         u32                     hash1 = 0;
1286         u32                     hash2 = 0;
1287         int                     i;
1288         u32                     offset;
1289         u8                      tmp;
1290
1291         if (dev->flags & IFF_PROMISC) {
1292                 tmp = tlan_dio_read8(dev->base_addr, TLAN_NET_CMD);
1293                 tlan_dio_write8(dev->base_addr,
1294                                 TLAN_NET_CMD, tmp | TLAN_NET_CMD_CAF);
1295         } else {
1296                 tmp = tlan_dio_read8(dev->base_addr, TLAN_NET_CMD);
1297                 tlan_dio_write8(dev->base_addr,
1298                                 TLAN_NET_CMD, tmp & ~TLAN_NET_CMD_CAF);
1299                 if (dev->flags & IFF_ALLMULTI) {
1300                         for (i = 0; i < 3; i++)
1301                                 tlan_set_mac(dev, i + 1, NULL);
1302                         tlan_dio_write32(dev->base_addr, TLAN_HASH_1,
1303                                          0xffffffff);
1304                         tlan_dio_write32(dev->base_addr, TLAN_HASH_2,
1305                                          0xffffffff);
1306                 } else {
1307                         i = 0;
1308                         netdev_for_each_mc_addr(ha, dev) {
1309                                 if (i < 3) {
1310                                         tlan_set_mac(dev, i + 1,
1311                                                      (char *) &ha->addr);
1312                                 } else {
1313                                         offset =
1314                                                 tlan_hash_func((u8 *)&ha->addr);
1315                                         if (offset < 32)
1316                                                 hash1 |= (1 << offset);
1317                                         else
1318                                                 hash2 |= (1 << (offset - 32));
1319                                 }
1320                                 i++;
1321                         }
1322                         for ( ; i < 3; i++)
1323                                 tlan_set_mac(dev, i + 1, NULL);
1324                         tlan_dio_write32(dev->base_addr, TLAN_HASH_1, hash1);
1325                         tlan_dio_write32(dev->base_addr, TLAN_HASH_2, hash2);
1326                 }
1327         }
1328
1329 }
1330
1331
1332
1333 /*****************************************************************************
1334 ******************************************************************************
1335
1336 ThunderLAN driver interrupt vectors and table
1337
1338 please see chap. 4, "Interrupt Handling" of the "ThunderLAN
1339 Programmer's Guide" for more informations on handling interrupts
1340 generated by TLAN based adapters.
1341
1342 ******************************************************************************
1343 *****************************************************************************/
1344
1345
1346
1347
1348 /***************************************************************
1349  *      tlan_handle_tx_eof
1350  *
1351  *      Returns:
1352  *              1
1353  *      Parms:
1354  *              dev             Device assigned the IRQ that was
1355  *                              raised.
1356  *              host_int        The contents of the HOST_INT
1357  *                              port.
1358  *
1359  *      This function handles Tx EOF interrupts which are raised
1360  *      by the adapter when it has completed sending the
1361  *      contents of a buffer.  If detemines which list/buffer
1362  *      was completed and resets it.  If the buffer was the last
1363  *      in the channel (EOC), then the function checks to see if
1364  *      another buffer is ready to send, and if so, sends a Tx
1365  *      Go command.  Finally, the driver activates/continues the
1366  *      activity LED.
1367  *
1368  **************************************************************/
1369
1370 static u32 tlan_handle_tx_eof(struct net_device *dev, u16 host_int)
1371 {
1372         struct tlan_priv        *priv = netdev_priv(dev);
1373         int             eoc = 0;
1374         struct tlan_list        *head_list;
1375         dma_addr_t      head_list_phys;
1376         u32             ack = 0;
1377         u16             tmp_c_stat;
1378
1379         TLAN_DBG(TLAN_DEBUG_TX,
1380                  "TRANSMIT:  Handling TX EOF (Head=%d Tail=%d)\n",
1381                  priv->tx_head, priv->tx_tail);
1382         head_list = priv->tx_list + priv->tx_head;
1383
1384         while (((tmp_c_stat = head_list->c_stat) & TLAN_CSTAT_FRM_CMP)
1385                && (ack < 255)) {
1386                 struct sk_buff *skb = tlan_get_skb(head_list);
1387
1388                 ack++;
1389                 pci_unmap_single(priv->pci_dev, head_list->buffer[0].address,
1390                                  max(skb->len,
1391                                      (unsigned int)TLAN_MIN_FRAME_SIZE),
1392                                  PCI_DMA_TODEVICE);
1393                 dev_kfree_skb_any(skb);
1394                 head_list->buffer[8].address = 0;
1395                 head_list->buffer[9].address = 0;
1396
1397                 if (tmp_c_stat & TLAN_CSTAT_EOC)
1398                         eoc = 1;
1399
1400                 dev->stats.tx_bytes += head_list->frame_size;
1401
1402                 head_list->c_stat = TLAN_CSTAT_UNUSED;
1403                 netif_start_queue(dev);
1404                 CIRC_INC(priv->tx_head, TLAN_NUM_TX_LISTS);
1405                 head_list = priv->tx_list + priv->tx_head;
1406         }
1407
1408         if (!ack)
1409                 netdev_info(dev,
1410                             "Received interrupt for uncompleted TX frame\n");
1411
1412         if (eoc) {
1413                 TLAN_DBG(TLAN_DEBUG_TX,
1414                          "TRANSMIT:  handling TX EOC (Head=%d Tail=%d)\n",
1415                          priv->tx_head, priv->tx_tail);
1416                 head_list = priv->tx_list + priv->tx_head;
1417                 head_list_phys = priv->tx_list_dma
1418                         + sizeof(struct tlan_list)*priv->tx_head;
1419                 if ((head_list->c_stat & TLAN_CSTAT_READY)
1420                     == TLAN_CSTAT_READY) {
1421                         outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1422                         ack |= TLAN_HC_GO;
1423                 } else {
1424                         priv->tx_in_progress = 0;
1425                 }
1426         }
1427
1428         if (priv->adapter->flags & TLAN_ADAPTER_ACTIVITY_LED) {
1429                 tlan_dio_write8(dev->base_addr,
1430                                 TLAN_LED_REG, TLAN_LED_LINK | TLAN_LED_ACT);
1431                 if (priv->timer.function == NULL) {
1432                         priv->timer.function = tlan_timer;
1433                         priv->timer.data = (unsigned long) dev;
1434                         priv->timer.expires = jiffies + TLAN_TIMER_ACT_DELAY;
1435                         priv->timer_set_at = jiffies;
1436                         priv->timer_type = TLAN_TIMER_ACTIVITY;
1437                         add_timer(&priv->timer);
1438                 } else if (priv->timer_type == TLAN_TIMER_ACTIVITY) {
1439                         priv->timer_set_at = jiffies;
1440                 }
1441         }
1442
1443         return ack;
1444
1445 }
1446
1447
1448
1449
1450 /***************************************************************
1451  *      TLan_HandleStatOverflow
1452  *
1453  *      Returns:
1454  *              1
1455  *      Parms:
1456  *              dev             Device assigned the IRQ that was
1457  *                              raised.
1458  *              host_int        The contents of the HOST_INT
1459  *                              port.
1460  *
1461  *      This function handles the Statistics Overflow interrupt
1462  *      which means that one or more of the TLAN statistics
1463  *      registers has reached 1/2 capacity and needs to be read.
1464  *
1465  **************************************************************/
1466
1467 static u32 tlan_handle_stat_overflow(struct net_device *dev, u16 host_int)
1468 {
1469         tlan_read_and_clear_stats(dev, TLAN_RECORD);
1470
1471         return 1;
1472
1473 }
1474
1475
1476
1477
1478 /***************************************************************
1479  *      TLan_HandleRxEOF
1480  *
1481  *      Returns:
1482  *              1
1483  *      Parms:
1484  *              dev             Device assigned the IRQ that was
1485  *                              raised.
1486  *              host_int        The contents of the HOST_INT
1487  *                              port.
1488  *
1489  *      This function handles the Rx EOF interrupt which
1490  *      indicates a frame has been received by the adapter from
1491  *      the net and the frame has been transferred to memory.
1492  *      The function determines the bounce buffer the frame has
1493  *      been loaded into, creates a new sk_buff big enough to
1494  *      hold the frame, and sends it to protocol stack.  It
1495  *      then resets the used buffer and appends it to the end
1496  *      of the list.  If the frame was the last in the Rx
1497  *      channel (EOC), the function restarts the receive channel
1498  *      by sending an Rx Go command to the adapter.  Then it
1499  *      activates/continues the activity LED.
1500  *
1501  **************************************************************/
1502
1503 static u32 tlan_handle_rx_eof(struct net_device *dev, u16 host_int)
1504 {
1505         struct tlan_priv        *priv = netdev_priv(dev);
1506         u32             ack = 0;
1507         int             eoc = 0;
1508         struct tlan_list        *head_list;
1509         struct sk_buff  *skb;
1510         struct tlan_list        *tail_list;
1511         u16             tmp_c_stat;
1512         dma_addr_t      head_list_phys;
1513
1514         TLAN_DBG(TLAN_DEBUG_RX, "RECEIVE:  handling RX EOF (Head=%d Tail=%d)\n",
1515                  priv->rx_head, priv->rx_tail);
1516         head_list = priv->rx_list + priv->rx_head;
1517         head_list_phys =
1518                 priv->rx_list_dma + sizeof(struct tlan_list)*priv->rx_head;
1519
1520         while (((tmp_c_stat = head_list->c_stat) & TLAN_CSTAT_FRM_CMP)
1521                && (ack < 255)) {
1522                 dma_addr_t frame_dma = head_list->buffer[0].address;
1523                 u32 frame_size = head_list->frame_size;
1524                 struct sk_buff *new_skb;
1525
1526                 ack++;
1527                 if (tmp_c_stat & TLAN_CSTAT_EOC)
1528                         eoc = 1;
1529
1530                 new_skb = netdev_alloc_skb_ip_align(dev,
1531                                                     TLAN_MAX_FRAME_SIZE + 5);
1532                 if (!new_skb)
1533                         goto drop_and_reuse;
1534
1535                 skb = tlan_get_skb(head_list);
1536                 pci_unmap_single(priv->pci_dev, frame_dma,
1537                                  TLAN_MAX_FRAME_SIZE, PCI_DMA_FROMDEVICE);
1538                 skb_put(skb, frame_size);
1539
1540                 dev->stats.rx_bytes += frame_size;
1541
1542                 skb->protocol = eth_type_trans(skb, dev);
1543                 netif_rx(skb);
1544
1545                 head_list->buffer[0].address =
1546                         pci_map_single(priv->pci_dev, new_skb->data,
1547                                        TLAN_MAX_FRAME_SIZE, PCI_DMA_FROMDEVICE);
1548
1549                 tlan_store_skb(head_list, new_skb);
1550 drop_and_reuse:
1551                 head_list->forward = 0;
1552                 head_list->c_stat = 0;
1553                 tail_list = priv->rx_list + priv->rx_tail;
1554                 tail_list->forward = head_list_phys;
1555
1556                 CIRC_INC(priv->rx_head, TLAN_NUM_RX_LISTS);
1557                 CIRC_INC(priv->rx_tail, TLAN_NUM_RX_LISTS);
1558                 head_list = priv->rx_list + priv->rx_head;
1559                 head_list_phys = priv->rx_list_dma
1560                         + sizeof(struct tlan_list)*priv->rx_head;
1561         }
1562
1563         if (!ack)
1564                 netdev_info(dev,
1565                             "Received interrupt for uncompleted RX frame\n");
1566
1567
1568         if (eoc) {
1569                 TLAN_DBG(TLAN_DEBUG_RX,
1570                          "RECEIVE:  handling RX EOC (Head=%d Tail=%d)\n",
1571                          priv->rx_head, priv->rx_tail);
1572                 head_list = priv->rx_list + priv->rx_head;
1573                 head_list_phys = priv->rx_list_dma
1574                         + sizeof(struct tlan_list)*priv->rx_head;
1575                 outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1576                 ack |= TLAN_HC_GO | TLAN_HC_RT;
1577                 priv->rx_eoc_count++;
1578         }
1579
1580         if (priv->adapter->flags & TLAN_ADAPTER_ACTIVITY_LED) {
1581                 tlan_dio_write8(dev->base_addr,
1582                                 TLAN_LED_REG, TLAN_LED_LINK | TLAN_LED_ACT);
1583                 if (priv->timer.function == NULL)  {
1584                         priv->timer.function = tlan_timer;
1585                         priv->timer.data = (unsigned long) dev;
1586                         priv->timer.expires = jiffies + TLAN_TIMER_ACT_DELAY;
1587                         priv->timer_set_at = jiffies;
1588                         priv->timer_type = TLAN_TIMER_ACTIVITY;
1589                         add_timer(&priv->timer);
1590                 } else if (priv->timer_type == TLAN_TIMER_ACTIVITY) {
1591                         priv->timer_set_at = jiffies;
1592                 }
1593         }
1594
1595         return ack;
1596
1597 }
1598
1599
1600
1601
1602 /***************************************************************
1603  *      tlan_handle_dummy
1604  *
1605  *      Returns:
1606  *              1
1607  *      Parms:
1608  *              dev             Device assigned the IRQ that was
1609  *                              raised.
1610  *              host_int        The contents of the HOST_INT
1611  *                              port.
1612  *
1613  *      This function handles the Dummy interrupt, which is
1614  *      raised whenever a test interrupt is generated by setting
1615  *      the Req_Int bit of HOST_CMD to 1.
1616  *
1617  **************************************************************/
1618
1619 static u32 tlan_handle_dummy(struct net_device *dev, u16 host_int)
1620 {
1621         netdev_info(dev, "Test interrupt\n");
1622         return 1;
1623
1624 }
1625
1626
1627
1628
1629 /***************************************************************
1630  *      tlan_handle_tx_eoc
1631  *
1632  *      Returns:
1633  *              1
1634  *      Parms:
1635  *              dev             Device assigned the IRQ that was
1636  *                              raised.
1637  *              host_int        The contents of the HOST_INT
1638  *                              port.
1639  *
1640  *      This driver is structured to determine EOC occurrences by
1641  *      reading the CSTAT member of the list structure.  Tx EOC
1642  *      interrupts are disabled via the DIO INTDIS register.
1643  *      However, TLAN chips before revision 3.0 didn't have this
1644  *      functionality, so process EOC events if this is the
1645  *      case.
1646  *
1647  **************************************************************/
1648
1649 static u32 tlan_handle_tx_eoc(struct net_device *dev, u16 host_int)
1650 {
1651         struct tlan_priv        *priv = netdev_priv(dev);
1652         struct tlan_list                *head_list;
1653         dma_addr_t              head_list_phys;
1654         u32                     ack = 1;
1655
1656         host_int = 0;
1657         if (priv->tlan_rev < 0x30) {
1658                 TLAN_DBG(TLAN_DEBUG_TX,
1659                          "TRANSMIT:  handling TX EOC (Head=%d Tail=%d) -- IRQ\n",
1660                          priv->tx_head, priv->tx_tail);
1661                 head_list = priv->tx_list + priv->tx_head;
1662                 head_list_phys = priv->tx_list_dma
1663                         + sizeof(struct tlan_list)*priv->tx_head;
1664                 if ((head_list->c_stat & TLAN_CSTAT_READY)
1665                     == TLAN_CSTAT_READY) {
1666                         netif_stop_queue(dev);
1667                         outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1668                         ack |= TLAN_HC_GO;
1669                 } else {
1670                         priv->tx_in_progress = 0;
1671                 }
1672         }
1673
1674         return ack;
1675
1676 }
1677
1678
1679
1680
1681 /***************************************************************
1682  *      tlan_handle_status_check
1683  *
1684  *      Returns:
1685  *              0 if Adapter check, 1 if Network Status check.
1686  *      Parms:
1687  *              dev             Device assigned the IRQ that was
1688  *                              raised.
1689  *              host_int        The contents of the HOST_INT
1690  *                              port.
1691  *
1692  *      This function handles Adapter Check/Network Status
1693  *      interrupts generated by the adapter.  It checks the
1694  *      vector in the HOST_INT register to determine if it is
1695  *      an Adapter Check interrupt.  If so, it resets the
1696  *      adapter.  Otherwise it clears the status registers
1697  *      and services the PHY.
1698  *
1699  **************************************************************/
1700
1701 static u32 tlan_handle_status_check(struct net_device *dev, u16 host_int)
1702 {
1703         struct tlan_priv        *priv = netdev_priv(dev);
1704         u32             ack;
1705         u32             error;
1706         u8              net_sts;
1707         u32             phy;
1708         u16             tlphy_ctl;
1709         u16             tlphy_sts;
1710
1711         ack = 1;
1712         if (host_int & TLAN_HI_IV_MASK) {
1713                 netif_stop_queue(dev);
1714                 error = inl(dev->base_addr + TLAN_CH_PARM);
1715                 netdev_info(dev, "Adaptor Error = 0x%x\n", error);
1716                 tlan_read_and_clear_stats(dev, TLAN_RECORD);
1717                 outl(TLAN_HC_AD_RST, dev->base_addr + TLAN_HOST_CMD);
1718
1719                 schedule_work(&priv->tlan_tqueue);
1720
1721                 netif_wake_queue(dev);
1722                 ack = 0;
1723         } else {
1724                 TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Status Check\n", dev->name);
1725                 phy = priv->phy[priv->phy_num];
1726
1727                 net_sts = tlan_dio_read8(dev->base_addr, TLAN_NET_STS);
1728                 if (net_sts) {
1729                         tlan_dio_write8(dev->base_addr, TLAN_NET_STS, net_sts);
1730                         TLAN_DBG(TLAN_DEBUG_GNRL, "%s:    Net_Sts = %x\n",
1731                                  dev->name, (unsigned) net_sts);
1732                 }
1733                 if ((net_sts & TLAN_NET_STS_MIRQ) &&  (priv->phy_num == 0)) {
1734                         tlan_mii_read_reg(dev, phy, TLAN_TLPHY_STS, &tlphy_sts);
1735                         tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tlphy_ctl);
1736                         if (!(tlphy_sts & TLAN_TS_POLOK) &&
1737                             !(tlphy_ctl & TLAN_TC_SWAPOL)) {
1738                                 tlphy_ctl |= TLAN_TC_SWAPOL;
1739                                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL,
1740                                                    tlphy_ctl);
1741                         } else if ((tlphy_sts & TLAN_TS_POLOK) &&
1742                                    (tlphy_ctl & TLAN_TC_SWAPOL)) {
1743                                 tlphy_ctl &= ~TLAN_TC_SWAPOL;
1744                                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL,
1745                                                    tlphy_ctl);
1746                         }
1747
1748                         if (debug)
1749                                 tlan_phy_print(dev);
1750                 }
1751         }
1752
1753         return ack;
1754
1755 }
1756
1757
1758
1759
1760 /***************************************************************
1761  *      tlan_handle_rx_eoc
1762  *
1763  *      Returns:
1764  *              1
1765  *      Parms:
1766  *              dev             Device assigned the IRQ that was
1767  *                              raised.
1768  *              host_int        The contents of the HOST_INT
1769  *                              port.
1770  *
1771  *      This driver is structured to determine EOC occurrences by
1772  *      reading the CSTAT member of the list structure.  Rx EOC
1773  *      interrupts are disabled via the DIO INTDIS register.
1774  *      However, TLAN chips before revision 3.0 didn't have this
1775  *      CSTAT member or a INTDIS register, so if this chip is
1776  *      pre-3.0, process EOC interrupts normally.
1777  *
1778  **************************************************************/
1779
1780 static u32 tlan_handle_rx_eoc(struct net_device *dev, u16 host_int)
1781 {
1782         struct tlan_priv        *priv = netdev_priv(dev);
1783         dma_addr_t      head_list_phys;
1784         u32             ack = 1;
1785
1786         if (priv->tlan_rev < 0x30) {
1787                 TLAN_DBG(TLAN_DEBUG_RX,
1788                          "RECEIVE:  Handling RX EOC (head=%d tail=%d) -- IRQ\n",
1789                          priv->rx_head, priv->rx_tail);
1790                 head_list_phys = priv->rx_list_dma
1791                         + sizeof(struct tlan_list)*priv->rx_head;
1792                 outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1793                 ack |= TLAN_HC_GO | TLAN_HC_RT;
1794                 priv->rx_eoc_count++;
1795         }
1796
1797         return ack;
1798
1799 }
1800
1801
1802
1803
1804 /*****************************************************************************
1805 ******************************************************************************
1806
1807 ThunderLAN driver timer function
1808
1809 ******************************************************************************
1810 *****************************************************************************/
1811
1812
1813 /***************************************************************
1814  *      tlan_timer
1815  *
1816  *      Returns:
1817  *              Nothing
1818  *      Parms:
1819  *              data    A value given to add timer when
1820  *                      add_timer was called.
1821  *
1822  *      This function handles timed functionality for the
1823  *      TLAN driver.  The two current timer uses are for
1824  *      delaying for autonegotionation and driving the ACT LED.
1825  *      -       Autonegotiation requires being allowed about
1826  *              2 1/2 seconds before attempting to transmit a
1827  *              packet.  It would be a very bad thing to hang
1828  *              the kernel this long, so the driver doesn't
1829  *              allow transmission 'til after this time, for
1830  *              certain PHYs.  It would be much nicer if all
1831  *              PHYs were interrupt-capable like the internal
1832  *              PHY.
1833  *      -       The ACT LED, which shows adapter activity, is
1834  *              driven by the driver, and so must be left on
1835  *              for a short period to power up the LED so it
1836  *              can be seen.  This delay can be changed by
1837  *              changing the TLAN_TIMER_ACT_DELAY in tlan.h,
1838  *              if desired.  100 ms  produces a slightly
1839  *              sluggish response.
1840  *
1841  **************************************************************/
1842
1843 static void tlan_timer(unsigned long data)
1844 {
1845         struct net_device       *dev = (struct net_device *) data;
1846         struct tlan_priv        *priv = netdev_priv(dev);
1847         u32             elapsed;
1848         unsigned long   flags = 0;
1849
1850         priv->timer.function = NULL;
1851
1852         switch (priv->timer_type) {
1853         case TLAN_TIMER_PHY_PDOWN:
1854                 tlan_phy_power_down(dev);
1855                 break;
1856         case TLAN_TIMER_PHY_PUP:
1857                 tlan_phy_power_up(dev);
1858                 break;
1859         case TLAN_TIMER_PHY_RESET:
1860                 tlan_phy_reset(dev);
1861                 break;
1862         case TLAN_TIMER_PHY_START_LINK:
1863                 tlan_phy_start_link(dev);
1864                 break;
1865         case TLAN_TIMER_PHY_FINISH_AN:
1866                 tlan_phy_finish_auto_neg(dev);
1867                 break;
1868         case TLAN_TIMER_FINISH_RESET:
1869                 tlan_finish_reset(dev);
1870                 break;
1871         case TLAN_TIMER_ACTIVITY:
1872                 spin_lock_irqsave(&priv->lock, flags);
1873                 if (priv->timer.function == NULL) {
1874                         elapsed = jiffies - priv->timer_set_at;
1875                         if (elapsed >= TLAN_TIMER_ACT_DELAY) {
1876                                 tlan_dio_write8(dev->base_addr,
1877                                                 TLAN_LED_REG, TLAN_LED_LINK);
1878                         } else  {
1879                                 priv->timer.function = tlan_timer;
1880                                 priv->timer.expires = priv->timer_set_at
1881                                         + TLAN_TIMER_ACT_DELAY;
1882                                 spin_unlock_irqrestore(&priv->lock, flags);
1883                                 add_timer(&priv->timer);
1884                                 break;
1885                         }
1886                 }
1887                 spin_unlock_irqrestore(&priv->lock, flags);
1888                 break;
1889         default:
1890                 break;
1891         }
1892
1893 }
1894
1895
1896 /*****************************************************************************
1897 ******************************************************************************
1898
1899 ThunderLAN driver adapter related routines
1900
1901 ******************************************************************************
1902 *****************************************************************************/
1903
1904
1905 /***************************************************************
1906  *      tlan_reset_lists
1907  *
1908  *      Returns:
1909  *              Nothing
1910  *      Parms:
1911  *              dev     The device structure with the list
1912  *                      stuctures to be reset.
1913  *
1914  *      This routine sets the variables associated with managing
1915  *      the TLAN lists to their initial values.
1916  *
1917  **************************************************************/
1918
1919 static void tlan_reset_lists(struct net_device *dev)
1920 {
1921         struct tlan_priv *priv = netdev_priv(dev);
1922         int             i;
1923         struct tlan_list        *list;
1924         dma_addr_t      list_phys;
1925         struct sk_buff  *skb;
1926
1927         priv->tx_head = 0;
1928         priv->tx_tail = 0;
1929         for (i = 0; i < TLAN_NUM_TX_LISTS; i++) {
1930                 list = priv->tx_list + i;
1931                 list->c_stat = TLAN_CSTAT_UNUSED;
1932                 list->buffer[0].address = 0;
1933                 list->buffer[2].count = 0;
1934                 list->buffer[2].address = 0;
1935                 list->buffer[8].address = 0;
1936                 list->buffer[9].address = 0;
1937         }
1938
1939         priv->rx_head = 0;
1940         priv->rx_tail = TLAN_NUM_RX_LISTS - 1;
1941         for (i = 0; i < TLAN_NUM_RX_LISTS; i++) {
1942                 list = priv->rx_list + i;
1943                 list_phys = priv->rx_list_dma + sizeof(struct tlan_list)*i;
1944                 list->c_stat = TLAN_CSTAT_READY;
1945                 list->frame_size = TLAN_MAX_FRAME_SIZE;
1946                 list->buffer[0].count = TLAN_MAX_FRAME_SIZE | TLAN_LAST_BUFFER;
1947                 skb = netdev_alloc_skb_ip_align(dev, TLAN_MAX_FRAME_SIZE + 5);
1948                 if (!skb)
1949                         break;
1950
1951                 list->buffer[0].address = pci_map_single(priv->pci_dev,
1952                                                          skb->data,
1953                                                          TLAN_MAX_FRAME_SIZE,
1954                                                          PCI_DMA_FROMDEVICE);
1955                 tlan_store_skb(list, skb);
1956                 list->buffer[1].count = 0;
1957                 list->buffer[1].address = 0;
1958                 list->forward = list_phys + sizeof(struct tlan_list);
1959         }
1960
1961         /* in case ran out of memory early, clear bits */
1962         while (i < TLAN_NUM_RX_LISTS) {
1963                 tlan_store_skb(priv->rx_list + i, NULL);
1964                 ++i;
1965         }
1966         list->forward = 0;
1967
1968 }
1969
1970
1971 static void tlan_free_lists(struct net_device *dev)
1972 {
1973         struct tlan_priv *priv = netdev_priv(dev);
1974         int             i;
1975         struct tlan_list        *list;
1976         struct sk_buff  *skb;
1977
1978         for (i = 0; i < TLAN_NUM_TX_LISTS; i++) {
1979                 list = priv->tx_list + i;
1980                 skb = tlan_get_skb(list);
1981                 if (skb) {
1982                         pci_unmap_single(
1983                                 priv->pci_dev,
1984                                 list->buffer[0].address,
1985                                 max(skb->len,
1986                                     (unsigned int)TLAN_MIN_FRAME_SIZE),
1987                                 PCI_DMA_TODEVICE);
1988                         dev_kfree_skb_any(skb);
1989                         list->buffer[8].address = 0;
1990                         list->buffer[9].address = 0;
1991                 }
1992         }
1993
1994         for (i = 0; i < TLAN_NUM_RX_LISTS; i++) {
1995                 list = priv->rx_list + i;
1996                 skb = tlan_get_skb(list);
1997                 if (skb) {
1998                         pci_unmap_single(priv->pci_dev,
1999                                          list->buffer[0].address,
2000                                          TLAN_MAX_FRAME_SIZE,
2001                                          PCI_DMA_FROMDEVICE);
2002                         dev_kfree_skb_any(skb);
2003                         list->buffer[8].address = 0;
2004                         list->buffer[9].address = 0;
2005                 }
2006         }
2007 }
2008
2009
2010
2011
2012 /***************************************************************
2013  *      tlan_print_dio
2014  *
2015  *      Returns:
2016  *              Nothing
2017  *      Parms:
2018  *              io_base         Base IO port of the device of
2019  *                              which to print DIO registers.
2020  *
2021  *      This function prints out all the internal (DIO)
2022  *      registers of a TLAN chip.
2023  *
2024  **************************************************************/
2025
2026 static void tlan_print_dio(u16 io_base)
2027 {
2028         u32 data0, data1;
2029         int     i;
2030
2031         pr_info("Contents of internal registers for io base 0x%04hx\n",
2032                 io_base);
2033         pr_info("Off.  +0        +4\n");
2034         for (i = 0; i < 0x4C; i += 8) {
2035                 data0 = tlan_dio_read32(io_base, i);
2036                 data1 = tlan_dio_read32(io_base, i + 0x4);
2037                 pr_info("0x%02x  0x%08x 0x%08x\n", i, data0, data1);
2038         }
2039
2040 }
2041
2042
2043
2044
2045 /***************************************************************
2046  *      TLan_PrintList
2047  *
2048  *      Returns:
2049  *              Nothing
2050  *      Parms:
2051  *              list    A pointer to the struct tlan_list structure to
2052  *                      be printed.
2053  *              type    A string to designate type of list,
2054  *                      "Rx" or "Tx".
2055  *              num     The index of the list.
2056  *
2057  *      This function prints out the contents of the list
2058  *      pointed to by the list parameter.
2059  *
2060  **************************************************************/
2061
2062 static void tlan_print_list(struct tlan_list *list, char *type, int num)
2063 {
2064         int i;
2065
2066         pr_info("%s List %d at %p\n", type, num, list);
2067         pr_info("   Forward    = 0x%08x\n",  list->forward);
2068         pr_info("   CSTAT      = 0x%04hx\n", list->c_stat);
2069         pr_info("   Frame Size = 0x%04hx\n", list->frame_size);
2070         /* for (i = 0; i < 10; i++) { */
2071         for (i = 0; i < 2; i++) {
2072                 pr_info("   Buffer[%d].count, addr = 0x%08x, 0x%08x\n",
2073                         i, list->buffer[i].count, list->buffer[i].address);
2074         }
2075
2076 }
2077
2078
2079
2080
2081 /***************************************************************
2082  *      tlan_read_and_clear_stats
2083  *
2084  *      Returns:
2085  *              Nothing
2086  *      Parms:
2087  *              dev     Pointer to device structure of adapter
2088  *                      to which to read stats.
2089  *              record  Flag indicating whether to add
2090  *
2091  *      This functions reads all the internal status registers
2092  *      of the TLAN chip, which clears them as a side effect.
2093  *      It then either adds the values to the device's status
2094  *      struct, or discards them, depending on whether record
2095  *      is TLAN_RECORD (!=0)  or TLAN_IGNORE (==0).
2096  *
2097  **************************************************************/
2098
2099 static void tlan_read_and_clear_stats(struct net_device *dev, int record)
2100 {
2101         u32             tx_good, tx_under;
2102         u32             rx_good, rx_over;
2103         u32             def_tx, crc, code;
2104         u32             multi_col, single_col;
2105         u32             excess_col, late_col, loss;
2106
2107         outw(TLAN_GOOD_TX_FRMS, dev->base_addr + TLAN_DIO_ADR);
2108         tx_good  = inb(dev->base_addr + TLAN_DIO_DATA);
2109         tx_good += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2110         tx_good += inb(dev->base_addr + TLAN_DIO_DATA + 2) << 16;
2111         tx_under = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2112
2113         outw(TLAN_GOOD_RX_FRMS, dev->base_addr + TLAN_DIO_ADR);
2114         rx_good  = inb(dev->base_addr + TLAN_DIO_DATA);
2115         rx_good += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2116         rx_good += inb(dev->base_addr + TLAN_DIO_DATA + 2) << 16;
2117         rx_over  = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2118
2119         outw(TLAN_DEFERRED_TX, dev->base_addr + TLAN_DIO_ADR);
2120         def_tx  = inb(dev->base_addr + TLAN_DIO_DATA);
2121         def_tx += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2122         crc     = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2123         code    = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2124
2125         outw(TLAN_MULTICOL_FRMS, dev->base_addr + TLAN_DIO_ADR);
2126         multi_col   = inb(dev->base_addr + TLAN_DIO_DATA);
2127         multi_col  += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2128         single_col  = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2129         single_col += inb(dev->base_addr + TLAN_DIO_DATA + 3) << 8;
2130
2131         outw(TLAN_EXCESSCOL_FRMS, dev->base_addr + TLAN_DIO_ADR);
2132         excess_col = inb(dev->base_addr + TLAN_DIO_DATA);
2133         late_col   = inb(dev->base_addr + TLAN_DIO_DATA + 1);
2134         loss       = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2135
2136         if (record) {
2137                 dev->stats.rx_packets += rx_good;
2138                 dev->stats.rx_errors  += rx_over + crc + code;
2139                 dev->stats.tx_packets += tx_good;
2140                 dev->stats.tx_errors  += tx_under + loss;
2141                 dev->stats.collisions += multi_col
2142                         + single_col + excess_col + late_col;
2143
2144                 dev->stats.rx_over_errors    += rx_over;
2145                 dev->stats.rx_crc_errors     += crc;
2146                 dev->stats.rx_frame_errors   += code;
2147
2148                 dev->stats.tx_aborted_errors += tx_under;
2149                 dev->stats.tx_carrier_errors += loss;
2150         }
2151
2152 }
2153
2154
2155
2156
2157 /***************************************************************
2158  *      TLan_Reset
2159  *
2160  *      Returns:
2161  *              0
2162  *      Parms:
2163  *              dev     Pointer to device structure of adapter
2164  *                      to be reset.
2165  *
2166  *      This function resets the adapter and it's physical
2167  *      device.  See Chap. 3, pp. 9-10 of the "ThunderLAN
2168  *      Programmer's Guide" for details.  The routine tries to
2169  *      implement what is detailed there, though adjustments
2170  *      have been made.
2171  *
2172  **************************************************************/
2173
2174 static void
2175 tlan_reset_adapter(struct net_device *dev)
2176 {
2177         struct tlan_priv        *priv = netdev_priv(dev);
2178         int             i;
2179         u32             addr;
2180         u32             data;
2181         u8              data8;
2182
2183         priv->tlan_full_duplex = false;
2184         priv->phy_online = 0;
2185         netif_carrier_off(dev);
2186
2187 /*  1.  Assert reset bit. */
2188
2189         data = inl(dev->base_addr + TLAN_HOST_CMD);
2190         data |= TLAN_HC_AD_RST;
2191         outl(data, dev->base_addr + TLAN_HOST_CMD);
2192
2193         udelay(1000);
2194
2195 /*  2.  Turn off interrupts. (Probably isn't necessary) */
2196
2197         data = inl(dev->base_addr + TLAN_HOST_CMD);
2198         data |= TLAN_HC_INT_OFF;
2199         outl(data, dev->base_addr + TLAN_HOST_CMD);
2200
2201 /*  3.  Clear AREGs and HASHs. */
2202
2203         for (i = TLAN_AREG_0; i <= TLAN_HASH_2; i += 4)
2204                 tlan_dio_write32(dev->base_addr, (u16) i, 0);
2205
2206 /*  4.  Setup NetConfig register. */
2207
2208         data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN | TLAN_NET_CFG_PHY_EN;
2209         tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, (u16) data);
2210
2211 /*  5.  Load Ld_Tmr and Ld_Thr in HOST_CMD. */
2212
2213         outl(TLAN_HC_LD_TMR | 0x3f, dev->base_addr + TLAN_HOST_CMD);
2214         outl(TLAN_HC_LD_THR | 0x9, dev->base_addr + TLAN_HOST_CMD);
2215
2216 /*  6.  Unreset the MII by setting NMRST (in NetSio) to 1. */
2217
2218         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
2219         addr = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
2220         tlan_set_bit(TLAN_NET_SIO_NMRST, addr);
2221
2222 /*  7.  Setup the remaining registers. */
2223
2224         if (priv->tlan_rev >= 0x30) {
2225                 data8 = TLAN_ID_TX_EOC | TLAN_ID_RX_EOC;
2226                 tlan_dio_write8(dev->base_addr, TLAN_INT_DIS, data8);
2227         }
2228         tlan_phy_detect(dev);
2229         data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN;
2230
2231         if (priv->adapter->flags & TLAN_ADAPTER_BIT_RATE_PHY) {
2232                 data |= TLAN_NET_CFG_BIT;
2233                 if (priv->aui == 1) {
2234                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x0a);
2235                 } else if (priv->duplex == TLAN_DUPLEX_FULL) {
2236                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x00);
2237                         priv->tlan_full_duplex = true;
2238                 } else {
2239                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x08);
2240                 }
2241         }
2242
2243         if (priv->phy_num == 0)
2244                 data |= TLAN_NET_CFG_PHY_EN;
2245         tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, (u16) data);
2246
2247         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY)
2248                 tlan_finish_reset(dev);
2249         else
2250                 tlan_phy_power_down(dev);
2251
2252 }
2253
2254
2255
2256
2257 static void
2258 tlan_finish_reset(struct net_device *dev)
2259 {
2260         struct tlan_priv        *priv = netdev_priv(dev);
2261         u8              data;
2262         u32             phy;
2263         u8              sio;
2264         u16             status;
2265         u16             partner;
2266         u16             tlphy_ctl;
2267         u16             tlphy_par;
2268         u16             tlphy_id1, tlphy_id2;
2269         int             i;
2270
2271         phy = priv->phy[priv->phy_num];
2272
2273         data = TLAN_NET_CMD_NRESET | TLAN_NET_CMD_NWRAP;
2274         if (priv->tlan_full_duplex)
2275                 data |= TLAN_NET_CMD_DUPLEX;
2276         tlan_dio_write8(dev->base_addr, TLAN_NET_CMD, data);
2277         data = TLAN_NET_MASK_MASK4 | TLAN_NET_MASK_MASK5;
2278         if (priv->phy_num == 0)
2279                 data |= TLAN_NET_MASK_MASK7;
2280         tlan_dio_write8(dev->base_addr, TLAN_NET_MASK, data);
2281         tlan_dio_write16(dev->base_addr, TLAN_MAX_RX, ((1536)+7)&~7);
2282         tlan_mii_read_reg(dev, phy, MII_GEN_ID_HI, &tlphy_id1);
2283         tlan_mii_read_reg(dev, phy, MII_GEN_ID_LO, &tlphy_id2);
2284
2285         if ((priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) ||
2286             (priv->aui)) {
2287                 status = MII_GS_LINK;
2288                 netdev_info(dev, "Link forced\n");
2289         } else {
2290                 tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2291                 udelay(1000);
2292                 tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2293                 if (status & MII_GS_LINK) {
2294                         /* We only support link info on Nat.Sem. PHY's */
2295                         if ((tlphy_id1 == NAT_SEM_ID1) &&
2296                             (tlphy_id2 == NAT_SEM_ID2)) {
2297                                 tlan_mii_read_reg(dev, phy, MII_AN_LPA,
2298                                         &partner);
2299                                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_PAR,
2300                                         &tlphy_par);
2301
2302                                 netdev_info(dev,
2303                                         "Link active, %s %uMbps %s-Duplex\n",
2304                                         !(tlphy_par & TLAN_PHY_AN_EN_STAT)
2305                                         ? "forced" : "Autonegotiation enabled,",
2306                                         tlphy_par & TLAN_PHY_SPEED_100
2307                                         ? 100 : 10,
2308                                         tlphy_par & TLAN_PHY_DUPLEX_FULL
2309                                         ? "Full" : "Half");
2310
2311                                 if (tlphy_par & TLAN_PHY_AN_EN_STAT) {
2312                                         netdev_info(dev, "Partner capability:");
2313                                         for (i = 5; i < 10; i++)
2314                                                 if (partner & (1 << i))
2315                                                         pr_cont(" %s",
2316                                                                 media[i-5]);
2317                                         pr_cont("\n");
2318                                 }
2319                         } else
2320                                 netdev_info(dev, "Link active\n");
2321                         /* Enabling link beat monitoring */
2322                         priv->media_timer.function = tlan_phy_monitor;
2323                         priv->media_timer.data = (unsigned long) dev;
2324                         priv->media_timer.expires = jiffies + HZ;
2325                         add_timer(&priv->media_timer);
2326                 }
2327         }
2328
2329         if (priv->phy_num == 0) {
2330                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tlphy_ctl);
2331                 tlphy_ctl |= TLAN_TC_INTEN;
2332                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL, tlphy_ctl);
2333                 sio = tlan_dio_read8(dev->base_addr, TLAN_NET_SIO);
2334                 sio |= TLAN_NET_SIO_MINTEN;
2335                 tlan_dio_write8(dev->base_addr, TLAN_NET_SIO, sio);
2336         }
2337
2338         if (status & MII_GS_LINK) {
2339                 tlan_set_mac(dev, 0, dev->dev_addr);
2340                 priv->phy_online = 1;
2341                 outb((TLAN_HC_INT_ON >> 8), dev->base_addr + TLAN_HOST_CMD + 1);
2342                 if (debug >= 1 && debug != TLAN_DEBUG_PROBE)
2343                         outb((TLAN_HC_REQ_INT >> 8),
2344                              dev->base_addr + TLAN_HOST_CMD + 1);
2345                 outl(priv->rx_list_dma, dev->base_addr + TLAN_CH_PARM);
2346                 outl(TLAN_HC_GO | TLAN_HC_RT, dev->base_addr + TLAN_HOST_CMD);
2347                 tlan_dio_write8(dev->base_addr, TLAN_LED_REG, TLAN_LED_LINK);
2348                 netif_carrier_on(dev);
2349         } else {
2350                 netdev_info(dev, "Link inactive, will retry in 10 secs...\n");
2351                 tlan_set_timer(dev, (10*HZ), TLAN_TIMER_FINISH_RESET);
2352                 return;
2353         }
2354         tlan_set_multicast_list(dev);
2355
2356 }
2357
2358
2359
2360
2361 /***************************************************************
2362  *      tlan_set_mac
2363  *
2364  *      Returns:
2365  *              Nothing
2366  *      Parms:
2367  *              dev     Pointer to device structure of adapter
2368  *                      on which to change the AREG.
2369  *              areg    The AREG to set the address in (0 - 3).
2370  *              mac     A pointer to an array of chars.  Each
2371  *                      element stores one byte of the address.
2372  *                      IE, it isn't in ascii.
2373  *
2374  *      This function transfers a MAC address to one of the
2375  *      TLAN AREGs (address registers).  The TLAN chip locks
2376  *      the register on writing to offset 0 and unlocks the
2377  *      register after writing to offset 5.  If NULL is passed
2378  *      in mac, then the AREG is filled with 0's.
2379  *
2380  **************************************************************/
2381
2382 static void tlan_set_mac(struct net_device *dev, int areg, char *mac)
2383 {
2384         int i;
2385
2386         areg *= 6;
2387
2388         if (mac != NULL) {
2389                 for (i = 0; i < 6; i++)
2390                         tlan_dio_write8(dev->base_addr,
2391                                         TLAN_AREG_0 + areg + i, mac[i]);
2392         } else {
2393                 for (i = 0; i < 6; i++)
2394                         tlan_dio_write8(dev->base_addr,
2395                                         TLAN_AREG_0 + areg + i, 0);
2396         }
2397
2398 }
2399
2400
2401
2402
2403 /*****************************************************************************
2404 ******************************************************************************
2405
2406 ThunderLAN driver PHY layer routines
2407
2408 ******************************************************************************
2409 *****************************************************************************/
2410
2411
2412
2413 /*********************************************************************
2414  *      tlan_phy_print
2415  *
2416  *      Returns:
2417  *              Nothing
2418  *      Parms:
2419  *              dev     A pointer to the device structure of the
2420  *                      TLAN device having the PHYs to be detailed.
2421  *
2422  *      This function prints the registers a PHY (aka transceiver).
2423  *
2424  ********************************************************************/
2425
2426 static void tlan_phy_print(struct net_device *dev)
2427 {
2428         struct tlan_priv *priv = netdev_priv(dev);
2429         u16 i, data0, data1, data2, data3, phy;
2430
2431         phy = priv->phy[priv->phy_num];
2432
2433         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) {
2434                 netdev_info(dev, "Unmanaged PHY\n");
2435         } else if (phy <= TLAN_PHY_MAX_ADDR) {
2436                 netdev_info(dev, "PHY 0x%02x\n", phy);
2437                 pr_info("   Off.  +0     +1     +2     +3\n");
2438                 for (i = 0; i < 0x20; i += 4) {
2439                         tlan_mii_read_reg(dev, phy, i, &data0);
2440                         tlan_mii_read_reg(dev, phy, i + 1, &data1);
2441                         tlan_mii_read_reg(dev, phy, i + 2, &data2);
2442                         tlan_mii_read_reg(dev, phy, i + 3, &data3);
2443                         pr_info("   0x%02x 0x%04hx 0x%04hx 0x%04hx 0x%04hx\n",
2444                                 i, data0, data1, data2, data3);
2445                 }
2446         } else {
2447                 netdev_info(dev, "Invalid PHY\n");
2448         }
2449
2450 }
2451
2452
2453
2454
2455 /*********************************************************************
2456  *      tlan_phy_detect
2457  *
2458  *      Returns:
2459  *              Nothing
2460  *      Parms:
2461  *              dev     A pointer to the device structure of the adapter
2462  *                      for which the PHY needs determined.
2463  *
2464  *      So far I've found that adapters which have external PHYs
2465  *      may also use the internal PHY for part of the functionality.
2466  *      (eg, AUI/Thinnet).  This function finds out if this TLAN
2467  *      chip has an internal PHY, and then finds the first external
2468  *      PHY (starting from address 0) if it exists).
2469  *
2470  ********************************************************************/
2471
2472 static void tlan_phy_detect(struct net_device *dev)
2473 {
2474         struct tlan_priv *priv = netdev_priv(dev);
2475         u16             control;
2476         u16             hi;
2477         u16             lo;
2478         u32             phy;
2479
2480         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) {
2481                 priv->phy_num = 0xffff;
2482                 return;
2483         }
2484
2485         tlan_mii_read_reg(dev, TLAN_PHY_MAX_ADDR, MII_GEN_ID_HI, &hi);
2486
2487         if (hi != 0xffff)
2488                 priv->phy[0] = TLAN_PHY_MAX_ADDR;
2489         else
2490                 priv->phy[0] = TLAN_PHY_NONE;
2491
2492         priv->phy[1] = TLAN_PHY_NONE;
2493         for (phy = 0; phy <= TLAN_PHY_MAX_ADDR; phy++) {
2494                 tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &control);
2495                 tlan_mii_read_reg(dev, phy, MII_GEN_ID_HI, &hi);
2496                 tlan_mii_read_reg(dev, phy, MII_GEN_ID_LO, &lo);
2497                 if ((control != 0xffff) ||
2498                     (hi != 0xffff) || (lo != 0xffff)) {
2499                         TLAN_DBG(TLAN_DEBUG_GNRL,
2500                                  "PHY found at %02x %04x %04x %04x\n",
2501                                  phy, control, hi, lo);
2502                         if ((priv->phy[1] == TLAN_PHY_NONE) &&
2503                             (phy != TLAN_PHY_MAX_ADDR)) {
2504                                 priv->phy[1] = phy;
2505                         }
2506                 }
2507         }
2508
2509         if (priv->phy[1] != TLAN_PHY_NONE)
2510                 priv->phy_num = 1;
2511         else if (priv->phy[0] != TLAN_PHY_NONE)
2512                 priv->phy_num = 0;
2513         else
2514                 netdev_info(dev, "Cannot initialize device, no PHY was found!\n");
2515
2516 }
2517
2518
2519
2520
2521 static void tlan_phy_power_down(struct net_device *dev)
2522 {
2523         struct tlan_priv        *priv = netdev_priv(dev);
2524         u16             value;
2525
2526         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Powering down PHY(s).\n", dev->name);
2527         value = MII_GC_PDOWN | MII_GC_LOOPBK | MII_GC_ISOLATE;
2528         tlan_mii_sync(dev->base_addr);
2529         tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value);
2530         if ((priv->phy_num == 0) &&
2531             (priv->phy[1] != TLAN_PHY_NONE) &&
2532             (!(priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10))) {
2533                 tlan_mii_sync(dev->base_addr);
2534                 tlan_mii_write_reg(dev, priv->phy[1], MII_GEN_CTL, value);
2535         }
2536
2537         /* Wait for 50 ms and powerup
2538          * This is abitrary.  It is intended to make sure the
2539          * transceiver settles.
2540          */
2541         tlan_set_timer(dev, (HZ/20), TLAN_TIMER_PHY_PUP);
2542
2543 }
2544
2545
2546
2547
2548 static void tlan_phy_power_up(struct net_device *dev)
2549 {
2550         struct tlan_priv        *priv = netdev_priv(dev);
2551         u16             value;
2552
2553         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Powering up PHY.\n", dev->name);
2554         tlan_mii_sync(dev->base_addr);
2555         value = MII_GC_LOOPBK;
2556         tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value);
2557         tlan_mii_sync(dev->base_addr);
2558         /* Wait for 500 ms and reset the
2559          * transceiver.  The TLAN docs say both 50 ms and
2560          * 500 ms, so do the longer, just in case.
2561          */
2562         tlan_set_timer(dev, (HZ/20), TLAN_TIMER_PHY_RESET);
2563
2564 }
2565
2566
2567
2568
2569 static void tlan_phy_reset(struct net_device *dev)
2570 {
2571         struct tlan_priv        *priv = netdev_priv(dev);
2572         u16             phy;
2573         u16             value;
2574
2575         phy = priv->phy[priv->phy_num];
2576
2577         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Resetting PHY.\n", dev->name);
2578         tlan_mii_sync(dev->base_addr);
2579         value = MII_GC_LOOPBK | MII_GC_RESET;
2580         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, value);
2581         tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value);
2582         while (value & MII_GC_RESET)
2583                 tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value);
2584
2585         /* Wait for 500 ms and initialize.
2586          * I don't remember why I wait this long.
2587          * I've changed this to 50ms, as it seems long enough.
2588          */
2589         tlan_set_timer(dev, (HZ/20), TLAN_TIMER_PHY_START_LINK);
2590
2591 }
2592
2593
2594
2595
2596 static void tlan_phy_start_link(struct net_device *dev)
2597 {
2598         struct tlan_priv        *priv = netdev_priv(dev);
2599         u16             ability;
2600         u16             control;
2601         u16             data;
2602         u16             phy;
2603         u16             status;
2604         u16             tctl;
2605
2606         phy = priv->phy[priv->phy_num];
2607         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Trying to activate link.\n", dev->name);
2608         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2609         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &ability);
2610
2611         if ((status & MII_GS_AUTONEG) &&
2612             (!priv->aui)) {
2613                 ability = status >> 11;
2614                 if (priv->speed  == TLAN_SPEED_10 &&
2615                     priv->duplex == TLAN_DUPLEX_HALF) {
2616                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x0000);
2617                 } else if (priv->speed == TLAN_SPEED_10 &&
2618                            priv->duplex == TLAN_DUPLEX_FULL) {
2619                         priv->tlan_full_duplex = true;
2620                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x0100);
2621                 } else if (priv->speed == TLAN_SPEED_100 &&
2622                            priv->duplex == TLAN_DUPLEX_HALF) {
2623                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x2000);
2624                 } else if (priv->speed == TLAN_SPEED_100 &&
2625                            priv->duplex == TLAN_DUPLEX_FULL) {
2626                         priv->tlan_full_duplex = true;
2627                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x2100);
2628                 } else {
2629
2630                         /* Set Auto-Neg advertisement */
2631                         tlan_mii_write_reg(dev, phy, MII_AN_ADV,
2632                                            (ability << 5) | 1);
2633                         /* Enablee Auto-Neg */
2634                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x1000);
2635                         /* Restart Auto-Neg */
2636                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x1200);
2637                         /* Wait for 4 sec for autonegotiation
2638                          * to complete.  The max spec time is less than this
2639                          * but the card need additional time to start AN.
2640                          * .5 sec should be plenty extra.
2641                          */
2642                         netdev_info(dev, "Starting autonegotiation\n");
2643                         tlan_set_timer(dev, (2*HZ), TLAN_TIMER_PHY_FINISH_AN);
2644                         return;
2645                 }
2646
2647         }
2648
2649         if ((priv->aui) && (priv->phy_num != 0)) {
2650                 priv->phy_num = 0;
2651                 data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN
2652                         | TLAN_NET_CFG_PHY_EN;
2653                 tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, data);
2654                 tlan_set_timer(dev, (40*HZ/1000), TLAN_TIMER_PHY_PDOWN);
2655                 return;
2656         } else if (priv->phy_num == 0) {
2657                 control = 0;
2658                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tctl);
2659                 if (priv->aui) {
2660                         tctl |= TLAN_TC_AUISEL;
2661                 } else {
2662                         tctl &= ~TLAN_TC_AUISEL;
2663                         if (priv->duplex == TLAN_DUPLEX_FULL) {
2664                                 control |= MII_GC_DUPLEX;
2665                                 priv->tlan_full_duplex = true;
2666                         }
2667                         if (priv->speed == TLAN_SPEED_100)
2668                                 control |= MII_GC_SPEEDSEL;
2669                 }
2670                 tlan_mii_write_reg(dev, phy, MII_GEN_CTL, control);
2671                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL, tctl);
2672         }
2673
2674         /* Wait for 2 sec to give the transceiver time
2675          * to establish link.
2676          */
2677         tlan_set_timer(dev, (4*HZ), TLAN_TIMER_FINISH_RESET);
2678
2679 }
2680
2681
2682
2683
2684 static void tlan_phy_finish_auto_neg(struct net_device *dev)
2685 {
2686         struct tlan_priv        *priv = netdev_priv(dev);
2687         u16             an_adv;
2688         u16             an_lpa;
2689         u16             data;
2690         u16             mode;
2691         u16             phy;
2692         u16             status;
2693
2694         phy = priv->phy[priv->phy_num];
2695
2696         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2697         udelay(1000);
2698         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2699
2700         if (!(status & MII_GS_AUTOCMPLT)) {
2701                 /* Wait for 8 sec to give the process
2702                  * more time.  Perhaps we should fail after a while.
2703                  */
2704                 if (!priv->neg_be_verbose++) {
2705                         pr_info("Giving autonegotiation more time.\n");
2706                         pr_info("Please check that your adapter has\n");
2707                         pr_info("been properly connected to a HUB or Switch.\n");
2708                         pr_info("Trying to establish link in the background...\n");
2709                 }
2710                 tlan_set_timer(dev, (8*HZ), TLAN_TIMER_PHY_FINISH_AN);
2711                 return;
2712         }
2713
2714         netdev_info(dev, "Autonegotiation complete\n");
2715         tlan_mii_read_reg(dev, phy, MII_AN_ADV, &an_adv);
2716         tlan_mii_read_reg(dev, phy, MII_AN_LPA, &an_lpa);
2717         mode = an_adv & an_lpa & 0x03E0;
2718         if (mode & 0x0100)
2719                 priv->tlan_full_duplex = true;
2720         else if (!(mode & 0x0080) && (mode & 0x0040))
2721                 priv->tlan_full_duplex = true;
2722
2723         /* switch to internal PHY for 10 Mbps */
2724         if ((!(mode & 0x0180)) &&
2725             (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) &&
2726             (priv->phy_num != 0)) {
2727                 priv->phy_num = 0;
2728                 data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN
2729                         | TLAN_NET_CFG_PHY_EN;
2730                 tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, data);
2731                 tlan_set_timer(dev, (400*HZ/1000), TLAN_TIMER_PHY_PDOWN);
2732                 return;
2733         }
2734
2735         if (priv->phy_num == 0) {
2736                 if ((priv->duplex == TLAN_DUPLEX_FULL) ||
2737                     (an_adv & an_lpa & 0x0040)) {
2738                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL,
2739                                            MII_GC_AUTOENB | MII_GC_DUPLEX);
2740                         netdev_info(dev, "Starting internal PHY with FULL-DUPLEX\n");
2741                 } else {
2742                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL,
2743                                            MII_GC_AUTOENB);
2744                         netdev_info(dev, "Starting internal PHY with HALF-DUPLEX\n");
2745                 }
2746         }
2747
2748         /* Wait for 100 ms.  No reason in partiticular.
2749          */
2750         tlan_set_timer(dev, (HZ/10), TLAN_TIMER_FINISH_RESET);
2751
2752 }
2753
2754
2755 /*********************************************************************
2756  *
2757  *     tlan_phy_monitor
2758  *
2759  *     Returns:
2760  *            None
2761  *
2762  *     Params:
2763  *            data           The device structure of this device.
2764  *
2765  *
2766  *     This function monitors PHY condition by reading the status
2767  *     register via the MII bus, controls LINK LED and notifies the
2768  *     kernel about link state.
2769  *
2770  *******************************************************************/
2771
2772 static void tlan_phy_monitor(unsigned long data)
2773 {
2774         struct net_device *dev = (struct net_device *) data;
2775         struct tlan_priv *priv = netdev_priv(dev);
2776         u16     phy;
2777         u16     phy_status;
2778
2779         phy = priv->phy[priv->phy_num];
2780
2781         /* Get PHY status register */
2782         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &phy_status);
2783
2784         /* Check if link has been lost */
2785         if (!(phy_status & MII_GS_LINK)) {
2786                 if (netif_carrier_ok(dev)) {
2787                         printk(KERN_DEBUG "TLAN: %s has lost link\n",
2788                                dev->name);
2789                         tlan_dio_write8(dev->base_addr, TLAN_LED_REG, 0);
2790                         netif_carrier_off(dev);
2791                         if (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) {
2792                                 /* power down internal PHY */
2793                                 u16 data = MII_GC_PDOWN | MII_GC_LOOPBK |
2794                                            MII_GC_ISOLATE;
2795
2796                                 tlan_mii_sync(dev->base_addr);
2797                                 tlan_mii_write_reg(dev, priv->phy[0],
2798                                                    MII_GEN_CTL, data);
2799                                 /* set to external PHY */
2800                                 priv->phy_num = 1;
2801                                 /* restart autonegotiation */
2802                                 tlan_set_timer(dev, 4 * HZ / 10,
2803                                                TLAN_TIMER_PHY_PDOWN);
2804                                 return;
2805                         }
2806                 }
2807         }
2808
2809         /* Link restablished? */
2810         if ((phy_status & MII_GS_LINK) && !netif_carrier_ok(dev)) {
2811                 tlan_dio_write8(dev->base_addr, TLAN_LED_REG, TLAN_LED_LINK);
2812                 printk(KERN_DEBUG "TLAN: %s has reestablished link\n",
2813                        dev->name);
2814                 netif_carrier_on(dev);
2815         }
2816         priv->media_timer.expires = jiffies + HZ;
2817         add_timer(&priv->media_timer);
2818 }
2819
2820
2821 /*****************************************************************************
2822 ******************************************************************************
2823
2824 ThunderLAN driver MII routines
2825
2826 these routines are based on the information in chap. 2 of the
2827 "ThunderLAN Programmer's Guide", pp. 15-24.
2828
2829 ******************************************************************************
2830 *****************************************************************************/
2831
2832
2833 /***************************************************************
2834  *      tlan_mii_read_reg
2835  *
2836  *      Returns:
2837  *              false   if ack received ok
2838  *              true    if no ack received or other error
2839  *
2840  *      Parms:
2841  *              dev             The device structure containing
2842  *                              The io address and interrupt count
2843  *                              for this device.
2844  *              phy             The address of the PHY to be queried.
2845  *              reg             The register whose contents are to be
2846  *                              retrieved.
2847  *              val             A pointer to a variable to store the
2848  *                              retrieved value.
2849  *
2850  *      This function uses the TLAN's MII bus to retrieve the contents
2851  *      of a given register on a PHY.  It sends the appropriate info
2852  *      and then reads the 16-bit register value from the MII bus via
2853  *      the TLAN SIO register.
2854  *
2855  **************************************************************/
2856
2857 static bool
2858 tlan_mii_read_reg(struct net_device *dev, u16 phy, u16 reg, u16 *val)
2859 {
2860         u8      nack;
2861         u16     sio, tmp;
2862         u32     i;
2863         bool    err;
2864         int     minten;
2865         struct tlan_priv *priv = netdev_priv(dev);
2866         unsigned long flags = 0;
2867
2868         err = false;
2869         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
2870         sio = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
2871
2872         if (!in_irq())
2873                 spin_lock_irqsave(&priv->lock, flags);
2874
2875         tlan_mii_sync(dev->base_addr);
2876
2877         minten = tlan_get_bit(TLAN_NET_SIO_MINTEN, sio);
2878         if (minten)
2879                 tlan_clear_bit(TLAN_NET_SIO_MINTEN, sio);
2880
2881         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* start (01b) */
2882         tlan_mii_send_data(dev->base_addr, 0x2, 2);     /* read  (10b) */
2883         tlan_mii_send_data(dev->base_addr, phy, 5);     /* device #      */
2884         tlan_mii_send_data(dev->base_addr, reg, 5);     /* register #    */
2885
2886
2887         tlan_clear_bit(TLAN_NET_SIO_MTXEN, sio);        /* change direction */
2888
2889         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* clock idle bit */
2890         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2891         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* wait 300ns */
2892
2893         nack = tlan_get_bit(TLAN_NET_SIO_MDATA, sio);   /* check for ACK */
2894         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);           /* finish ACK */
2895         if (nack) {                                     /* no ACK, so fake it */
2896                 for (i = 0; i < 16; i++) {
2897                         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2898                         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2899                 }
2900                 tmp = 0xffff;
2901                 err = true;
2902         } else {                                        /* ACK, so read data */
2903                 for (tmp = 0, i = 0x8000; i; i >>= 1) {
2904                         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2905                         if (tlan_get_bit(TLAN_NET_SIO_MDATA, sio))
2906                                 tmp |= i;
2907                         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2908                 }
2909         }
2910
2911
2912         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* idle cycle */
2913         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2914
2915         if (minten)
2916                 tlan_set_bit(TLAN_NET_SIO_MINTEN, sio);
2917
2918         *val = tmp;
2919
2920         if (!in_irq())
2921                 spin_unlock_irqrestore(&priv->lock, flags);
2922
2923         return err;
2924
2925 }
2926
2927
2928
2929
2930 /***************************************************************
2931  *      tlan_mii_send_data
2932  *
2933  *      Returns:
2934  *              Nothing
2935  *      Parms:
2936  *              base_port       The base IO port of the adapter in
2937  *                              question.
2938  *              dev             The address of the PHY to be queried.
2939  *              data            The value to be placed on the MII bus.
2940  *              num_bits        The number of bits in data that are to
2941  *                              be placed on the MII bus.
2942  *
2943  *      This function sends on sequence of bits on the MII
2944  *      configuration bus.
2945  *
2946  **************************************************************/
2947
2948 static void tlan_mii_send_data(u16 base_port, u32 data, unsigned num_bits)
2949 {
2950         u16 sio;
2951         u32 i;
2952
2953         if (num_bits == 0)
2954                 return;
2955
2956         outw(TLAN_NET_SIO, base_port + TLAN_DIO_ADR);
2957         sio = base_port + TLAN_DIO_DATA + TLAN_NET_SIO;
2958         tlan_set_bit(TLAN_NET_SIO_MTXEN, sio);
2959
2960         for (i = (0x1 << (num_bits - 1)); i; i >>= 1) {
2961                 tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2962                 (void) tlan_get_bit(TLAN_NET_SIO_MCLK, sio);
2963                 if (data & i)
2964                         tlan_set_bit(TLAN_NET_SIO_MDATA, sio);
2965                 else
2966                         tlan_clear_bit(TLAN_NET_SIO_MDATA, sio);
2967                 tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2968                 (void) tlan_get_bit(TLAN_NET_SIO_MCLK, sio);
2969         }
2970
2971 }
2972
2973
2974
2975
2976 /***************************************************************
2977  *      TLan_MiiSync
2978  *
2979  *      Returns:
2980  *              Nothing
2981  *      Parms:
2982  *              base_port       The base IO port of the adapter in
2983  *                              question.
2984  *
2985  *      This functions syncs all PHYs in terms of the MII configuration
2986  *      bus.
2987  *
2988  **************************************************************/
2989
2990 static void tlan_mii_sync(u16 base_port)
2991 {
2992         int i;
2993         u16 sio;
2994
2995         outw(TLAN_NET_SIO, base_port + TLAN_DIO_ADR);
2996         sio = base_port + TLAN_DIO_DATA + TLAN_NET_SIO;
2997
2998         tlan_clear_bit(TLAN_NET_SIO_MTXEN, sio);
2999         for (i = 0; i < 32; i++) {
3000                 tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
3001                 tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
3002         }
3003
3004 }
3005
3006
3007
3008
3009 /***************************************************************
3010  *      tlan_mii_write_reg
3011  *
3012  *      Returns:
3013  *              Nothing
3014  *      Parms:
3015  *              dev             The device structure for the device
3016  *                              to write to.
3017  *              phy             The address of the PHY to be written to.
3018  *              reg             The register whose contents are to be
3019  *                              written.
3020  *              val             The value to be written to the register.
3021  *
3022  *      This function uses the TLAN's MII bus to write the contents of a
3023  *      given register on a PHY.  It sends the appropriate info and then
3024  *      writes the 16-bit register value from the MII configuration bus
3025  *      via the TLAN SIO register.
3026  *
3027  **************************************************************/
3028
3029 static void
3030 tlan_mii_write_reg(struct net_device *dev, u16 phy, u16 reg, u16 val)
3031 {
3032         u16     sio;
3033         int     minten;
3034         unsigned long flags = 0;
3035         struct tlan_priv *priv = netdev_priv(dev);
3036
3037         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
3038         sio = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
3039
3040         if (!in_irq())
3041                 spin_lock_irqsave(&priv->lock, flags);
3042
3043         tlan_mii_sync(dev->base_addr);
3044
3045         minten = tlan_get_bit(TLAN_NET_SIO_MINTEN, sio);
3046         if (minten)
3047                 tlan_clear_bit(TLAN_NET_SIO_MINTEN, sio);
3048
3049         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* start (01b) */
3050         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* write (01b) */
3051         tlan_mii_send_data(dev->base_addr, phy, 5);     /* device #      */
3052         tlan_mii_send_data(dev->base_addr, reg, 5);     /* register #    */
3053
3054         tlan_mii_send_data(dev->base_addr, 0x2, 2);     /* send ACK */
3055         tlan_mii_send_data(dev->base_addr, val, 16);    /* send data */
3056
3057         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio); /* idle cycle */
3058         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
3059
3060         if (minten)
3061                 tlan_set_bit(TLAN_NET_SIO_MINTEN, sio);
3062
3063         if (!in_irq())
3064                 spin_unlock_irqrestore(&priv->lock, flags);
3065
3066 }
3067
3068
3069
3070
3071 /*****************************************************************************
3072 ******************************************************************************
3073
3074 ThunderLAN driver eeprom routines
3075
3076 the Compaq netelligent 10 and 10/100 cards use a microchip 24C02A
3077 EEPROM.  these functions are based on information in microchip's
3078 data sheet.  I don't know how well this functions will work with
3079 other Eeproms.
3080
3081 ******************************************************************************
3082 *****************************************************************************/
3083
3084
3085 /***************************************************************
3086  *      tlan_ee_send_start
3087  *
3088  *      Returns:
3089  *              Nothing
3090  *      Parms:
3091  *              io_base         The IO port base address for the
3092  *                              TLAN device with the EEPROM to
3093  *                              use.
3094  *
3095  *      This function sends a start cycle to an EEPROM attached
3096  *      to a TLAN chip.
3097  *
3098  **************************************************************/
3099
3100 static void tlan_ee_send_start(u16 io_base)
3101 {
3102         u16     sio;
3103
3104         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3105         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3106
3107         tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3108         tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3109         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3110         tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3111         tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3112
3113 }
3114
3115
3116
3117
3118 /***************************************************************
3119  *      tlan_ee_send_byte
3120  *
3121  *      Returns:
3122  *              If the correct ack was received, 0, otherwise 1
3123  *      Parms:  io_base         The IO port base address for the
3124  *                              TLAN device with the EEPROM to
3125  *                              use.
3126  *              data            The 8 bits of information to
3127  *                              send to the EEPROM.
3128  *              stop            If TLAN_EEPROM_STOP is passed, a
3129  *                              stop cycle is sent after the
3130  *                              byte is sent after the ack is
3131  *                              read.
3132  *
3133  *      This function sends a byte on the serial EEPROM line,
3134  *      driving the clock to send each bit. The function then
3135  *      reverses transmission direction and reads an acknowledge
3136  *      bit.
3137  *
3138  **************************************************************/
3139
3140 static int tlan_ee_send_byte(u16 io_base, u8 data, int stop)
3141 {
3142         int     err;
3143         u8      place;
3144         u16     sio;
3145
3146         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3147         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3148
3149         /* Assume clock is low, tx is enabled; */
3150         for (place = 0x80; place != 0; place >>= 1) {
3151                 if (place & data)
3152                         tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3153                 else
3154                         tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3155                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3156                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3157         }
3158         tlan_clear_bit(TLAN_NET_SIO_ETXEN, sio);
3159         tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3160         err = tlan_get_bit(TLAN_NET_SIO_EDATA, sio);
3161         tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3162         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3163
3164         if ((!err) && stop) {
3165                 /* STOP, raise data while clock is high */
3166                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3167                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3168                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3169         }
3170
3171         return err;
3172
3173 }
3174
3175
3176
3177
3178 /***************************************************************
3179  *      tlan_ee_receive_byte
3180  *
3181  *      Returns:
3182  *              Nothing
3183  *      Parms:
3184  *              io_base         The IO port base address for the
3185  *                              TLAN device with the EEPROM to
3186  *                              use.
3187  *              data            An address to a char to hold the
3188  *                              data sent from the EEPROM.
3189  *              stop            If TLAN_EEPROM_STOP is passed, a
3190  *                              stop cycle is sent after the
3191  *                              byte is received, and no ack is
3192  *                              sent.
3193  *
3194  *      This function receives 8 bits of data from the EEPROM
3195  *      over the serial link.  It then sends and ack bit, or no
3196  *      ack and a stop bit.  This function is used to retrieve
3197  *      data after the address of a byte in the EEPROM has been
3198  *      sent.
3199  *
3200  **************************************************************/
3201
3202 static void tlan_ee_receive_byte(u16 io_base, u8 *data, int stop)
3203 {
3204         u8  place;
3205         u16 sio;
3206
3207         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3208         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3209         *data = 0;
3210
3211         /* Assume clock is low, tx is enabled; */
3212         tlan_clear_bit(TLAN_NET_SIO_ETXEN, sio);
3213         for (place = 0x80; place; place >>= 1) {
3214                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3215                 if (tlan_get_bit(TLAN_NET_SIO_EDATA, sio))
3216                         *data |= place;
3217                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3218         }
3219
3220         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3221         if (!stop) {
3222                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio); /* ack = 0 */
3223                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3224                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3225         } else {
3226                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);  /* no ack = 1 (?) */
3227                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3228                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3229                 /* STOP, raise data while clock is high */
3230                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3231                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3232                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3233         }
3234
3235 }
3236
3237
3238
3239
3240 /***************************************************************
3241  *      tlan_ee_read_byte
3242  *
3243  *      Returns:
3244  *              No error = 0, else, the stage at which the error
3245  *              occurred.
3246  *      Parms:
3247  *              io_base         The IO port base address for the
3248  *                              TLAN device with the EEPROM to
3249  *                              use.
3250  *              ee_addr         The address of the byte in the
3251  *                              EEPROM whose contents are to be
3252  *                              retrieved.
3253  *              data            An address to a char to hold the
3254  *                              data obtained from the EEPROM.
3255  *
3256  *      This function reads a byte of information from an byte
3257  *      cell in the EEPROM.
3258  *
3259  **************************************************************/
3260
3261 static int tlan_ee_read_byte(struct net_device *dev, u8 ee_addr, u8 *data)
3262 {
3263         int err;
3264         struct tlan_priv *priv = netdev_priv(dev);
3265         unsigned long flags = 0;
3266         int ret = 0;
3267
3268         spin_lock_irqsave(&priv->lock, flags);
3269
3270         tlan_ee_send_start(dev->base_addr);
3271         err = tlan_ee_send_byte(dev->base_addr, 0xa0, TLAN_EEPROM_ACK);
3272         if (err) {
3273                 ret = 1;
3274                 goto fail;
3275         }
3276         err = tlan_ee_send_byte(dev->base_addr, ee_addr, TLAN_EEPROM_ACK);
3277         if (err) {
3278                 ret = 2;
3279                 goto fail;
3280         }
3281         tlan_ee_send_start(dev->base_addr);
3282         err = tlan_ee_send_byte(dev->base_addr, 0xa1, TLAN_EEPROM_ACK);
3283         if (err) {
3284                 ret = 3;
3285                 goto fail;
3286         }
3287         tlan_ee_receive_byte(dev->base_addr, data, TLAN_EEPROM_STOP);
3288 fail:
3289         spin_unlock_irqrestore(&priv->lock, flags);
3290
3291         return ret;
3292
3293 }
3294
3295
3296