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         tlan_stop(dev);
1202
1203         free_irq(dev->irq, dev);
1204         tlan_free_lists(dev);
1205         TLAN_DBG(TLAN_DEBUG_GNRL, "Device %s closed.\n", dev->name);
1206
1207         return 0;
1208
1209 }
1210
1211
1212
1213
1214 /***************************************************************
1215  *      tlan_get_stats
1216  *
1217  *      Returns:
1218  *              A pointer to the device's statistics structure.
1219  *      Parms:
1220  *              dev     The device structure to return the
1221  *                      stats for.
1222  *
1223  *      This function updates the devices statistics by reading
1224  *      the TLAN chip's onboard registers.  Then it returns the
1225  *      address of the statistics structure.
1226  *
1227  **************************************************************/
1228
1229 static struct net_device_stats *tlan_get_stats(struct net_device *dev)
1230 {
1231         struct tlan_priv        *priv = netdev_priv(dev);
1232         int i;
1233
1234         /* Should only read stats if open ? */
1235         tlan_read_and_clear_stats(dev, TLAN_RECORD);
1236
1237         TLAN_DBG(TLAN_DEBUG_RX, "RECEIVE:  %s EOC count = %d\n", dev->name,
1238                  priv->rx_eoc_count);
1239         TLAN_DBG(TLAN_DEBUG_TX, "TRANSMIT:  %s Busy count = %d\n", dev->name,
1240                  priv->tx_busy_count);
1241         if (debug & TLAN_DEBUG_GNRL) {
1242                 tlan_print_dio(dev->base_addr);
1243                 tlan_phy_print(dev);
1244         }
1245         if (debug & TLAN_DEBUG_LIST) {
1246                 for (i = 0; i < TLAN_NUM_RX_LISTS; i++)
1247                         tlan_print_list(priv->rx_list + i, "RX", i);
1248                 for (i = 0; i < TLAN_NUM_TX_LISTS; i++)
1249                         tlan_print_list(priv->tx_list + i, "TX", i);
1250         }
1251
1252         return &dev->stats;
1253
1254 }
1255
1256
1257
1258
1259 /***************************************************************
1260  *      tlan_set_multicast_list
1261  *
1262  *      Returns:
1263  *              Nothing
1264  *      Parms:
1265  *              dev     The device structure to set the
1266  *                      multicast list for.
1267  *
1268  *      This function sets the TLAN adaptor to various receive
1269  *      modes.  If the IFF_PROMISC flag is set, promiscuous
1270  *      mode is acitviated.  Otherwise, promiscuous mode is
1271  *      turned off.  If the IFF_ALLMULTI flag is set, then
1272  *      the hash table is set to receive all group addresses.
1273  *      Otherwise, the first three multicast addresses are
1274  *      stored in AREG_1-3, and the rest are selected via the
1275  *      hash table, as necessary.
1276  *
1277  **************************************************************/
1278
1279 static void tlan_set_multicast_list(struct net_device *dev)
1280 {
1281         struct netdev_hw_addr *ha;
1282         u32                     hash1 = 0;
1283         u32                     hash2 = 0;
1284         int                     i;
1285         u32                     offset;
1286         u8                      tmp;
1287
1288         if (dev->flags & IFF_PROMISC) {
1289                 tmp = tlan_dio_read8(dev->base_addr, TLAN_NET_CMD);
1290                 tlan_dio_write8(dev->base_addr,
1291                                 TLAN_NET_CMD, tmp | TLAN_NET_CMD_CAF);
1292         } else {
1293                 tmp = tlan_dio_read8(dev->base_addr, TLAN_NET_CMD);
1294                 tlan_dio_write8(dev->base_addr,
1295                                 TLAN_NET_CMD, tmp & ~TLAN_NET_CMD_CAF);
1296                 if (dev->flags & IFF_ALLMULTI) {
1297                         for (i = 0; i < 3; i++)
1298                                 tlan_set_mac(dev, i + 1, NULL);
1299                         tlan_dio_write32(dev->base_addr, TLAN_HASH_1,
1300                                          0xffffffff);
1301                         tlan_dio_write32(dev->base_addr, TLAN_HASH_2,
1302                                          0xffffffff);
1303                 } else {
1304                         i = 0;
1305                         netdev_for_each_mc_addr(ha, dev) {
1306                                 if (i < 3) {
1307                                         tlan_set_mac(dev, i + 1,
1308                                                      (char *) &ha->addr);
1309                                 } else {
1310                                         offset =
1311                                                 tlan_hash_func((u8 *)&ha->addr);
1312                                         if (offset < 32)
1313                                                 hash1 |= (1 << offset);
1314                                         else
1315                                                 hash2 |= (1 << (offset - 32));
1316                                 }
1317                                 i++;
1318                         }
1319                         for ( ; i < 3; i++)
1320                                 tlan_set_mac(dev, i + 1, NULL);
1321                         tlan_dio_write32(dev->base_addr, TLAN_HASH_1, hash1);
1322                         tlan_dio_write32(dev->base_addr, TLAN_HASH_2, hash2);
1323                 }
1324         }
1325
1326 }
1327
1328
1329
1330 /*****************************************************************************
1331 ******************************************************************************
1332
1333 ThunderLAN driver interrupt vectors and table
1334
1335 please see chap. 4, "Interrupt Handling" of the "ThunderLAN
1336 Programmer's Guide" for more informations on handling interrupts
1337 generated by TLAN based adapters.
1338
1339 ******************************************************************************
1340 *****************************************************************************/
1341
1342
1343
1344
1345 /***************************************************************
1346  *      tlan_handle_tx_eof
1347  *
1348  *      Returns:
1349  *              1
1350  *      Parms:
1351  *              dev             Device assigned the IRQ that was
1352  *                              raised.
1353  *              host_int        The contents of the HOST_INT
1354  *                              port.
1355  *
1356  *      This function handles Tx EOF interrupts which are raised
1357  *      by the adapter when it has completed sending the
1358  *      contents of a buffer.  If detemines which list/buffer
1359  *      was completed and resets it.  If the buffer was the last
1360  *      in the channel (EOC), then the function checks to see if
1361  *      another buffer is ready to send, and if so, sends a Tx
1362  *      Go command.  Finally, the driver activates/continues the
1363  *      activity LED.
1364  *
1365  **************************************************************/
1366
1367 static u32 tlan_handle_tx_eof(struct net_device *dev, u16 host_int)
1368 {
1369         struct tlan_priv        *priv = netdev_priv(dev);
1370         int             eoc = 0;
1371         struct tlan_list        *head_list;
1372         dma_addr_t      head_list_phys;
1373         u32             ack = 0;
1374         u16             tmp_c_stat;
1375
1376         TLAN_DBG(TLAN_DEBUG_TX,
1377                  "TRANSMIT:  Handling TX EOF (Head=%d Tail=%d)\n",
1378                  priv->tx_head, priv->tx_tail);
1379         head_list = priv->tx_list + priv->tx_head;
1380
1381         while (((tmp_c_stat = head_list->c_stat) & TLAN_CSTAT_FRM_CMP)
1382                && (ack < 255)) {
1383                 struct sk_buff *skb = tlan_get_skb(head_list);
1384
1385                 ack++;
1386                 pci_unmap_single(priv->pci_dev, head_list->buffer[0].address,
1387                                  max(skb->len,
1388                                      (unsigned int)TLAN_MIN_FRAME_SIZE),
1389                                  PCI_DMA_TODEVICE);
1390                 dev_kfree_skb_any(skb);
1391                 head_list->buffer[8].address = 0;
1392                 head_list->buffer[9].address = 0;
1393
1394                 if (tmp_c_stat & TLAN_CSTAT_EOC)
1395                         eoc = 1;
1396
1397                 dev->stats.tx_bytes += head_list->frame_size;
1398
1399                 head_list->c_stat = TLAN_CSTAT_UNUSED;
1400                 netif_start_queue(dev);
1401                 CIRC_INC(priv->tx_head, TLAN_NUM_TX_LISTS);
1402                 head_list = priv->tx_list + priv->tx_head;
1403         }
1404
1405         if (!ack)
1406                 netdev_info(dev,
1407                             "Received interrupt for uncompleted TX frame\n");
1408
1409         if (eoc) {
1410                 TLAN_DBG(TLAN_DEBUG_TX,
1411                          "TRANSMIT:  handling TX EOC (Head=%d Tail=%d)\n",
1412                          priv->tx_head, priv->tx_tail);
1413                 head_list = priv->tx_list + priv->tx_head;
1414                 head_list_phys = priv->tx_list_dma
1415                         + sizeof(struct tlan_list)*priv->tx_head;
1416                 if ((head_list->c_stat & TLAN_CSTAT_READY)
1417                     == TLAN_CSTAT_READY) {
1418                         outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1419                         ack |= TLAN_HC_GO;
1420                 } else {
1421                         priv->tx_in_progress = 0;
1422                 }
1423         }
1424
1425         if (priv->adapter->flags & TLAN_ADAPTER_ACTIVITY_LED) {
1426                 tlan_dio_write8(dev->base_addr,
1427                                 TLAN_LED_REG, TLAN_LED_LINK | TLAN_LED_ACT);
1428                 if (priv->timer.function == NULL) {
1429                         priv->timer.function = tlan_timer;
1430                         priv->timer.data = (unsigned long) dev;
1431                         priv->timer.expires = jiffies + TLAN_TIMER_ACT_DELAY;
1432                         priv->timer_set_at = jiffies;
1433                         priv->timer_type = TLAN_TIMER_ACTIVITY;
1434                         add_timer(&priv->timer);
1435                 } else if (priv->timer_type == TLAN_TIMER_ACTIVITY) {
1436                         priv->timer_set_at = jiffies;
1437                 }
1438         }
1439
1440         return ack;
1441
1442 }
1443
1444
1445
1446
1447 /***************************************************************
1448  *      TLan_HandleStatOverflow
1449  *
1450  *      Returns:
1451  *              1
1452  *      Parms:
1453  *              dev             Device assigned the IRQ that was
1454  *                              raised.
1455  *              host_int        The contents of the HOST_INT
1456  *                              port.
1457  *
1458  *      This function handles the Statistics Overflow interrupt
1459  *      which means that one or more of the TLAN statistics
1460  *      registers has reached 1/2 capacity and needs to be read.
1461  *
1462  **************************************************************/
1463
1464 static u32 tlan_handle_stat_overflow(struct net_device *dev, u16 host_int)
1465 {
1466         tlan_read_and_clear_stats(dev, TLAN_RECORD);
1467
1468         return 1;
1469
1470 }
1471
1472
1473
1474
1475 /***************************************************************
1476  *      TLan_HandleRxEOF
1477  *
1478  *      Returns:
1479  *              1
1480  *      Parms:
1481  *              dev             Device assigned the IRQ that was
1482  *                              raised.
1483  *              host_int        The contents of the HOST_INT
1484  *                              port.
1485  *
1486  *      This function handles the Rx EOF interrupt which
1487  *      indicates a frame has been received by the adapter from
1488  *      the net and the frame has been transferred to memory.
1489  *      The function determines the bounce buffer the frame has
1490  *      been loaded into, creates a new sk_buff big enough to
1491  *      hold the frame, and sends it to protocol stack.  It
1492  *      then resets the used buffer and appends it to the end
1493  *      of the list.  If the frame was the last in the Rx
1494  *      channel (EOC), the function restarts the receive channel
1495  *      by sending an Rx Go command to the adapter.  Then it
1496  *      activates/continues the activity LED.
1497  *
1498  **************************************************************/
1499
1500 static u32 tlan_handle_rx_eof(struct net_device *dev, u16 host_int)
1501 {
1502         struct tlan_priv        *priv = netdev_priv(dev);
1503         u32             ack = 0;
1504         int             eoc = 0;
1505         struct tlan_list        *head_list;
1506         struct sk_buff  *skb;
1507         struct tlan_list        *tail_list;
1508         u16             tmp_c_stat;
1509         dma_addr_t      head_list_phys;
1510
1511         TLAN_DBG(TLAN_DEBUG_RX, "RECEIVE:  handling RX EOF (Head=%d Tail=%d)\n",
1512                  priv->rx_head, priv->rx_tail);
1513         head_list = priv->rx_list + priv->rx_head;
1514         head_list_phys =
1515                 priv->rx_list_dma + sizeof(struct tlan_list)*priv->rx_head;
1516
1517         while (((tmp_c_stat = head_list->c_stat) & TLAN_CSTAT_FRM_CMP)
1518                && (ack < 255)) {
1519                 dma_addr_t frame_dma = head_list->buffer[0].address;
1520                 u32 frame_size = head_list->frame_size;
1521                 struct sk_buff *new_skb;
1522
1523                 ack++;
1524                 if (tmp_c_stat & TLAN_CSTAT_EOC)
1525                         eoc = 1;
1526
1527                 new_skb = netdev_alloc_skb_ip_align(dev,
1528                                                     TLAN_MAX_FRAME_SIZE + 5);
1529                 if (!new_skb)
1530                         goto drop_and_reuse;
1531
1532                 skb = tlan_get_skb(head_list);
1533                 pci_unmap_single(priv->pci_dev, frame_dma,
1534                                  TLAN_MAX_FRAME_SIZE, PCI_DMA_FROMDEVICE);
1535                 skb_put(skb, frame_size);
1536
1537                 dev->stats.rx_bytes += frame_size;
1538
1539                 skb->protocol = eth_type_trans(skb, dev);
1540                 netif_rx(skb);
1541
1542                 head_list->buffer[0].address =
1543                         pci_map_single(priv->pci_dev, new_skb->data,
1544                                        TLAN_MAX_FRAME_SIZE, PCI_DMA_FROMDEVICE);
1545
1546                 tlan_store_skb(head_list, new_skb);
1547 drop_and_reuse:
1548                 head_list->forward = 0;
1549                 head_list->c_stat = 0;
1550                 tail_list = priv->rx_list + priv->rx_tail;
1551                 tail_list->forward = head_list_phys;
1552
1553                 CIRC_INC(priv->rx_head, TLAN_NUM_RX_LISTS);
1554                 CIRC_INC(priv->rx_tail, TLAN_NUM_RX_LISTS);
1555                 head_list = priv->rx_list + priv->rx_head;
1556                 head_list_phys = priv->rx_list_dma
1557                         + sizeof(struct tlan_list)*priv->rx_head;
1558         }
1559
1560         if (!ack)
1561                 netdev_info(dev,
1562                             "Received interrupt for uncompleted RX frame\n");
1563
1564
1565         if (eoc) {
1566                 TLAN_DBG(TLAN_DEBUG_RX,
1567                          "RECEIVE:  handling RX EOC (Head=%d Tail=%d)\n",
1568                          priv->rx_head, priv->rx_tail);
1569                 head_list = priv->rx_list + priv->rx_head;
1570                 head_list_phys = priv->rx_list_dma
1571                         + sizeof(struct tlan_list)*priv->rx_head;
1572                 outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1573                 ack |= TLAN_HC_GO | TLAN_HC_RT;
1574                 priv->rx_eoc_count++;
1575         }
1576
1577         if (priv->adapter->flags & TLAN_ADAPTER_ACTIVITY_LED) {
1578                 tlan_dio_write8(dev->base_addr,
1579                                 TLAN_LED_REG, TLAN_LED_LINK | TLAN_LED_ACT);
1580                 if (priv->timer.function == NULL)  {
1581                         priv->timer.function = tlan_timer;
1582                         priv->timer.data = (unsigned long) dev;
1583                         priv->timer.expires = jiffies + TLAN_TIMER_ACT_DELAY;
1584                         priv->timer_set_at = jiffies;
1585                         priv->timer_type = TLAN_TIMER_ACTIVITY;
1586                         add_timer(&priv->timer);
1587                 } else if (priv->timer_type == TLAN_TIMER_ACTIVITY) {
1588                         priv->timer_set_at = jiffies;
1589                 }
1590         }
1591
1592         return ack;
1593
1594 }
1595
1596
1597
1598
1599 /***************************************************************
1600  *      tlan_handle_dummy
1601  *
1602  *      Returns:
1603  *              1
1604  *      Parms:
1605  *              dev             Device assigned the IRQ that was
1606  *                              raised.
1607  *              host_int        The contents of the HOST_INT
1608  *                              port.
1609  *
1610  *      This function handles the Dummy interrupt, which is
1611  *      raised whenever a test interrupt is generated by setting
1612  *      the Req_Int bit of HOST_CMD to 1.
1613  *
1614  **************************************************************/
1615
1616 static u32 tlan_handle_dummy(struct net_device *dev, u16 host_int)
1617 {
1618         netdev_info(dev, "Test interrupt\n");
1619         return 1;
1620
1621 }
1622
1623
1624
1625
1626 /***************************************************************
1627  *      tlan_handle_tx_eoc
1628  *
1629  *      Returns:
1630  *              1
1631  *      Parms:
1632  *              dev             Device assigned the IRQ that was
1633  *                              raised.
1634  *              host_int        The contents of the HOST_INT
1635  *                              port.
1636  *
1637  *      This driver is structured to determine EOC occurrences by
1638  *      reading the CSTAT member of the list structure.  Tx EOC
1639  *      interrupts are disabled via the DIO INTDIS register.
1640  *      However, TLAN chips before revision 3.0 didn't have this
1641  *      functionality, so process EOC events if this is the
1642  *      case.
1643  *
1644  **************************************************************/
1645
1646 static u32 tlan_handle_tx_eoc(struct net_device *dev, u16 host_int)
1647 {
1648         struct tlan_priv        *priv = netdev_priv(dev);
1649         struct tlan_list                *head_list;
1650         dma_addr_t              head_list_phys;
1651         u32                     ack = 1;
1652
1653         host_int = 0;
1654         if (priv->tlan_rev < 0x30) {
1655                 TLAN_DBG(TLAN_DEBUG_TX,
1656                          "TRANSMIT:  handling TX EOC (Head=%d Tail=%d) -- IRQ\n",
1657                          priv->tx_head, priv->tx_tail);
1658                 head_list = priv->tx_list + priv->tx_head;
1659                 head_list_phys = priv->tx_list_dma
1660                         + sizeof(struct tlan_list)*priv->tx_head;
1661                 if ((head_list->c_stat & TLAN_CSTAT_READY)
1662                     == TLAN_CSTAT_READY) {
1663                         netif_stop_queue(dev);
1664                         outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1665                         ack |= TLAN_HC_GO;
1666                 } else {
1667                         priv->tx_in_progress = 0;
1668                 }
1669         }
1670
1671         return ack;
1672
1673 }
1674
1675
1676
1677
1678 /***************************************************************
1679  *      tlan_handle_status_check
1680  *
1681  *      Returns:
1682  *              0 if Adapter check, 1 if Network Status check.
1683  *      Parms:
1684  *              dev             Device assigned the IRQ that was
1685  *                              raised.
1686  *              host_int        The contents of the HOST_INT
1687  *                              port.
1688  *
1689  *      This function handles Adapter Check/Network Status
1690  *      interrupts generated by the adapter.  It checks the
1691  *      vector in the HOST_INT register to determine if it is
1692  *      an Adapter Check interrupt.  If so, it resets the
1693  *      adapter.  Otherwise it clears the status registers
1694  *      and services the PHY.
1695  *
1696  **************************************************************/
1697
1698 static u32 tlan_handle_status_check(struct net_device *dev, u16 host_int)
1699 {
1700         struct tlan_priv        *priv = netdev_priv(dev);
1701         u32             ack;
1702         u32             error;
1703         u8              net_sts;
1704         u32             phy;
1705         u16             tlphy_ctl;
1706         u16             tlphy_sts;
1707
1708         ack = 1;
1709         if (host_int & TLAN_HI_IV_MASK) {
1710                 netif_stop_queue(dev);
1711                 error = inl(dev->base_addr + TLAN_CH_PARM);
1712                 netdev_info(dev, "Adaptor Error = 0x%x\n", error);
1713                 tlan_read_and_clear_stats(dev, TLAN_RECORD);
1714                 outl(TLAN_HC_AD_RST, dev->base_addr + TLAN_HOST_CMD);
1715
1716                 schedule_work(&priv->tlan_tqueue);
1717
1718                 netif_wake_queue(dev);
1719                 ack = 0;
1720         } else {
1721                 TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Status Check\n", dev->name);
1722                 phy = priv->phy[priv->phy_num];
1723
1724                 net_sts = tlan_dio_read8(dev->base_addr, TLAN_NET_STS);
1725                 if (net_sts) {
1726                         tlan_dio_write8(dev->base_addr, TLAN_NET_STS, net_sts);
1727                         TLAN_DBG(TLAN_DEBUG_GNRL, "%s:    Net_Sts = %x\n",
1728                                  dev->name, (unsigned) net_sts);
1729                 }
1730                 if ((net_sts & TLAN_NET_STS_MIRQ) &&  (priv->phy_num == 0)) {
1731                         tlan_mii_read_reg(dev, phy, TLAN_TLPHY_STS, &tlphy_sts);
1732                         tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tlphy_ctl);
1733                         if (!(tlphy_sts & TLAN_TS_POLOK) &&
1734                             !(tlphy_ctl & TLAN_TC_SWAPOL)) {
1735                                 tlphy_ctl |= TLAN_TC_SWAPOL;
1736                                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL,
1737                                                    tlphy_ctl);
1738                         } else if ((tlphy_sts & TLAN_TS_POLOK) &&
1739                                    (tlphy_ctl & TLAN_TC_SWAPOL)) {
1740                                 tlphy_ctl &= ~TLAN_TC_SWAPOL;
1741                                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL,
1742                                                    tlphy_ctl);
1743                         }
1744
1745                         if (debug)
1746                                 tlan_phy_print(dev);
1747                 }
1748         }
1749
1750         return ack;
1751
1752 }
1753
1754
1755
1756
1757 /***************************************************************
1758  *      tlan_handle_rx_eoc
1759  *
1760  *      Returns:
1761  *              1
1762  *      Parms:
1763  *              dev             Device assigned the IRQ that was
1764  *                              raised.
1765  *              host_int        The contents of the HOST_INT
1766  *                              port.
1767  *
1768  *      This driver is structured to determine EOC occurrences by
1769  *      reading the CSTAT member of the list structure.  Rx EOC
1770  *      interrupts are disabled via the DIO INTDIS register.
1771  *      However, TLAN chips before revision 3.0 didn't have this
1772  *      CSTAT member or a INTDIS register, so if this chip is
1773  *      pre-3.0, process EOC interrupts normally.
1774  *
1775  **************************************************************/
1776
1777 static u32 tlan_handle_rx_eoc(struct net_device *dev, u16 host_int)
1778 {
1779         struct tlan_priv        *priv = netdev_priv(dev);
1780         dma_addr_t      head_list_phys;
1781         u32             ack = 1;
1782
1783         if (priv->tlan_rev < 0x30) {
1784                 TLAN_DBG(TLAN_DEBUG_RX,
1785                          "RECEIVE:  Handling RX EOC (head=%d tail=%d) -- IRQ\n",
1786                          priv->rx_head, priv->rx_tail);
1787                 head_list_phys = priv->rx_list_dma
1788                         + sizeof(struct tlan_list)*priv->rx_head;
1789                 outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1790                 ack |= TLAN_HC_GO | TLAN_HC_RT;
1791                 priv->rx_eoc_count++;
1792         }
1793
1794         return ack;
1795
1796 }
1797
1798
1799
1800
1801 /*****************************************************************************
1802 ******************************************************************************
1803
1804 ThunderLAN driver timer function
1805
1806 ******************************************************************************
1807 *****************************************************************************/
1808
1809
1810 /***************************************************************
1811  *      tlan_timer
1812  *
1813  *      Returns:
1814  *              Nothing
1815  *      Parms:
1816  *              data    A value given to add timer when
1817  *                      add_timer was called.
1818  *
1819  *      This function handles timed functionality for the
1820  *      TLAN driver.  The two current timer uses are for
1821  *      delaying for autonegotionation and driving the ACT LED.
1822  *      -       Autonegotiation requires being allowed about
1823  *              2 1/2 seconds before attempting to transmit a
1824  *              packet.  It would be a very bad thing to hang
1825  *              the kernel this long, so the driver doesn't
1826  *              allow transmission 'til after this time, for
1827  *              certain PHYs.  It would be much nicer if all
1828  *              PHYs were interrupt-capable like the internal
1829  *              PHY.
1830  *      -       The ACT LED, which shows adapter activity, is
1831  *              driven by the driver, and so must be left on
1832  *              for a short period to power up the LED so it
1833  *              can be seen.  This delay can be changed by
1834  *              changing the TLAN_TIMER_ACT_DELAY in tlan.h,
1835  *              if desired.  100 ms  produces a slightly
1836  *              sluggish response.
1837  *
1838  **************************************************************/
1839
1840 static void tlan_timer(unsigned long data)
1841 {
1842         struct net_device       *dev = (struct net_device *) data;
1843         struct tlan_priv        *priv = netdev_priv(dev);
1844         u32             elapsed;
1845         unsigned long   flags = 0;
1846
1847         priv->timer.function = NULL;
1848
1849         switch (priv->timer_type) {
1850         case TLAN_TIMER_PHY_PDOWN:
1851                 tlan_phy_power_down(dev);
1852                 break;
1853         case TLAN_TIMER_PHY_PUP:
1854                 tlan_phy_power_up(dev);
1855                 break;
1856         case TLAN_TIMER_PHY_RESET:
1857                 tlan_phy_reset(dev);
1858                 break;
1859         case TLAN_TIMER_PHY_START_LINK:
1860                 tlan_phy_start_link(dev);
1861                 break;
1862         case TLAN_TIMER_PHY_FINISH_AN:
1863                 tlan_phy_finish_auto_neg(dev);
1864                 break;
1865         case TLAN_TIMER_FINISH_RESET:
1866                 tlan_finish_reset(dev);
1867                 break;
1868         case TLAN_TIMER_ACTIVITY:
1869                 spin_lock_irqsave(&priv->lock, flags);
1870                 if (priv->timer.function == NULL) {
1871                         elapsed = jiffies - priv->timer_set_at;
1872                         if (elapsed >= TLAN_TIMER_ACT_DELAY) {
1873                                 tlan_dio_write8(dev->base_addr,
1874                                                 TLAN_LED_REG, TLAN_LED_LINK);
1875                         } else  {
1876                                 priv->timer.function = tlan_timer;
1877                                 priv->timer.expires = priv->timer_set_at
1878                                         + TLAN_TIMER_ACT_DELAY;
1879                                 spin_unlock_irqrestore(&priv->lock, flags);
1880                                 add_timer(&priv->timer);
1881                                 break;
1882                         }
1883                 }
1884                 spin_unlock_irqrestore(&priv->lock, flags);
1885                 break;
1886         default:
1887                 break;
1888         }
1889
1890 }
1891
1892
1893 /*****************************************************************************
1894 ******************************************************************************
1895
1896 ThunderLAN driver adapter related routines
1897
1898 ******************************************************************************
1899 *****************************************************************************/
1900
1901
1902 /***************************************************************
1903  *      tlan_reset_lists
1904  *
1905  *      Returns:
1906  *              Nothing
1907  *      Parms:
1908  *              dev     The device structure with the list
1909  *                      stuctures to be reset.
1910  *
1911  *      This routine sets the variables associated with managing
1912  *      the TLAN lists to their initial values.
1913  *
1914  **************************************************************/
1915
1916 static void tlan_reset_lists(struct net_device *dev)
1917 {
1918         struct tlan_priv *priv = netdev_priv(dev);
1919         int             i;
1920         struct tlan_list        *list;
1921         dma_addr_t      list_phys;
1922         struct sk_buff  *skb;
1923
1924         priv->tx_head = 0;
1925         priv->tx_tail = 0;
1926         for (i = 0; i < TLAN_NUM_TX_LISTS; i++) {
1927                 list = priv->tx_list + i;
1928                 list->c_stat = TLAN_CSTAT_UNUSED;
1929                 list->buffer[0].address = 0;
1930                 list->buffer[2].count = 0;
1931                 list->buffer[2].address = 0;
1932                 list->buffer[8].address = 0;
1933                 list->buffer[9].address = 0;
1934         }
1935
1936         priv->rx_head = 0;
1937         priv->rx_tail = TLAN_NUM_RX_LISTS - 1;
1938         for (i = 0; i < TLAN_NUM_RX_LISTS; i++) {
1939                 list = priv->rx_list + i;
1940                 list_phys = priv->rx_list_dma + sizeof(struct tlan_list)*i;
1941                 list->c_stat = TLAN_CSTAT_READY;
1942                 list->frame_size = TLAN_MAX_FRAME_SIZE;
1943                 list->buffer[0].count = TLAN_MAX_FRAME_SIZE | TLAN_LAST_BUFFER;
1944                 skb = netdev_alloc_skb_ip_align(dev, TLAN_MAX_FRAME_SIZE + 5);
1945                 if (!skb)
1946                         break;
1947
1948                 list->buffer[0].address = pci_map_single(priv->pci_dev,
1949                                                          skb->data,
1950                                                          TLAN_MAX_FRAME_SIZE,
1951                                                          PCI_DMA_FROMDEVICE);
1952                 tlan_store_skb(list, skb);
1953                 list->buffer[1].count = 0;
1954                 list->buffer[1].address = 0;
1955                 list->forward = list_phys + sizeof(struct tlan_list);
1956         }
1957
1958         /* in case ran out of memory early, clear bits */
1959         while (i < TLAN_NUM_RX_LISTS) {
1960                 tlan_store_skb(priv->rx_list + i, NULL);
1961                 ++i;
1962         }
1963         list->forward = 0;
1964
1965 }
1966
1967
1968 static void tlan_free_lists(struct net_device *dev)
1969 {
1970         struct tlan_priv *priv = netdev_priv(dev);
1971         int             i;
1972         struct tlan_list        *list;
1973         struct sk_buff  *skb;
1974
1975         for (i = 0; i < TLAN_NUM_TX_LISTS; i++) {
1976                 list = priv->tx_list + i;
1977                 skb = tlan_get_skb(list);
1978                 if (skb) {
1979                         pci_unmap_single(
1980                                 priv->pci_dev,
1981                                 list->buffer[0].address,
1982                                 max(skb->len,
1983                                     (unsigned int)TLAN_MIN_FRAME_SIZE),
1984                                 PCI_DMA_TODEVICE);
1985                         dev_kfree_skb_any(skb);
1986                         list->buffer[8].address = 0;
1987                         list->buffer[9].address = 0;
1988                 }
1989         }
1990
1991         for (i = 0; i < TLAN_NUM_RX_LISTS; i++) {
1992                 list = priv->rx_list + i;
1993                 skb = tlan_get_skb(list);
1994                 if (skb) {
1995                         pci_unmap_single(priv->pci_dev,
1996                                          list->buffer[0].address,
1997                                          TLAN_MAX_FRAME_SIZE,
1998                                          PCI_DMA_FROMDEVICE);
1999                         dev_kfree_skb_any(skb);
2000                         list->buffer[8].address = 0;
2001                         list->buffer[9].address = 0;
2002                 }
2003         }
2004 }
2005
2006
2007
2008
2009 /***************************************************************
2010  *      tlan_print_dio
2011  *
2012  *      Returns:
2013  *              Nothing
2014  *      Parms:
2015  *              io_base         Base IO port of the device of
2016  *                              which to print DIO registers.
2017  *
2018  *      This function prints out all the internal (DIO)
2019  *      registers of a TLAN chip.
2020  *
2021  **************************************************************/
2022
2023 static void tlan_print_dio(u16 io_base)
2024 {
2025         u32 data0, data1;
2026         int     i;
2027
2028         pr_info("Contents of internal registers for io base 0x%04hx\n",
2029                 io_base);
2030         pr_info("Off.  +0        +4\n");
2031         for (i = 0; i < 0x4C; i += 8) {
2032                 data0 = tlan_dio_read32(io_base, i);
2033                 data1 = tlan_dio_read32(io_base, i + 0x4);
2034                 pr_info("0x%02x  0x%08x 0x%08x\n", i, data0, data1);
2035         }
2036
2037 }
2038
2039
2040
2041
2042 /***************************************************************
2043  *      TLan_PrintList
2044  *
2045  *      Returns:
2046  *              Nothing
2047  *      Parms:
2048  *              list    A pointer to the struct tlan_list structure to
2049  *                      be printed.
2050  *              type    A string to designate type of list,
2051  *                      "Rx" or "Tx".
2052  *              num     The index of the list.
2053  *
2054  *      This function prints out the contents of the list
2055  *      pointed to by the list parameter.
2056  *
2057  **************************************************************/
2058
2059 static void tlan_print_list(struct tlan_list *list, char *type, int num)
2060 {
2061         int i;
2062
2063         pr_info("%s List %d at %p\n", type, num, list);
2064         pr_info("   Forward    = 0x%08x\n",  list->forward);
2065         pr_info("   CSTAT      = 0x%04hx\n", list->c_stat);
2066         pr_info("   Frame Size = 0x%04hx\n", list->frame_size);
2067         /* for (i = 0; i < 10; i++) { */
2068         for (i = 0; i < 2; i++) {
2069                 pr_info("   Buffer[%d].count, addr = 0x%08x, 0x%08x\n",
2070                         i, list->buffer[i].count, list->buffer[i].address);
2071         }
2072
2073 }
2074
2075
2076
2077
2078 /***************************************************************
2079  *      tlan_read_and_clear_stats
2080  *
2081  *      Returns:
2082  *              Nothing
2083  *      Parms:
2084  *              dev     Pointer to device structure of adapter
2085  *                      to which to read stats.
2086  *              record  Flag indicating whether to add
2087  *
2088  *      This functions reads all the internal status registers
2089  *      of the TLAN chip, which clears them as a side effect.
2090  *      It then either adds the values to the device's status
2091  *      struct, or discards them, depending on whether record
2092  *      is TLAN_RECORD (!=0)  or TLAN_IGNORE (==0).
2093  *
2094  **************************************************************/
2095
2096 static void tlan_read_and_clear_stats(struct net_device *dev, int record)
2097 {
2098         u32             tx_good, tx_under;
2099         u32             rx_good, rx_over;
2100         u32             def_tx, crc, code;
2101         u32             multi_col, single_col;
2102         u32             excess_col, late_col, loss;
2103
2104         outw(TLAN_GOOD_TX_FRMS, dev->base_addr + TLAN_DIO_ADR);
2105         tx_good  = inb(dev->base_addr + TLAN_DIO_DATA);
2106         tx_good += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2107         tx_good += inb(dev->base_addr + TLAN_DIO_DATA + 2) << 16;
2108         tx_under = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2109
2110         outw(TLAN_GOOD_RX_FRMS, dev->base_addr + TLAN_DIO_ADR);
2111         rx_good  = inb(dev->base_addr + TLAN_DIO_DATA);
2112         rx_good += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2113         rx_good += inb(dev->base_addr + TLAN_DIO_DATA + 2) << 16;
2114         rx_over  = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2115
2116         outw(TLAN_DEFERRED_TX, dev->base_addr + TLAN_DIO_ADR);
2117         def_tx  = inb(dev->base_addr + TLAN_DIO_DATA);
2118         def_tx += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2119         crc     = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2120         code    = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2121
2122         outw(TLAN_MULTICOL_FRMS, dev->base_addr + TLAN_DIO_ADR);
2123         multi_col   = inb(dev->base_addr + TLAN_DIO_DATA);
2124         multi_col  += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2125         single_col  = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2126         single_col += inb(dev->base_addr + TLAN_DIO_DATA + 3) << 8;
2127
2128         outw(TLAN_EXCESSCOL_FRMS, dev->base_addr + TLAN_DIO_ADR);
2129         excess_col = inb(dev->base_addr + TLAN_DIO_DATA);
2130         late_col   = inb(dev->base_addr + TLAN_DIO_DATA + 1);
2131         loss       = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2132
2133         if (record) {
2134                 dev->stats.rx_packets += rx_good;
2135                 dev->stats.rx_errors  += rx_over + crc + code;
2136                 dev->stats.tx_packets += tx_good;
2137                 dev->stats.tx_errors  += tx_under + loss;
2138                 dev->stats.collisions += multi_col
2139                         + single_col + excess_col + late_col;
2140
2141                 dev->stats.rx_over_errors    += rx_over;
2142                 dev->stats.rx_crc_errors     += crc;
2143                 dev->stats.rx_frame_errors   += code;
2144
2145                 dev->stats.tx_aborted_errors += tx_under;
2146                 dev->stats.tx_carrier_errors += loss;
2147         }
2148
2149 }
2150
2151
2152
2153
2154 /***************************************************************
2155  *      TLan_Reset
2156  *
2157  *      Returns:
2158  *              0
2159  *      Parms:
2160  *              dev     Pointer to device structure of adapter
2161  *                      to be reset.
2162  *
2163  *      This function resets the adapter and it's physical
2164  *      device.  See Chap. 3, pp. 9-10 of the "ThunderLAN
2165  *      Programmer's Guide" for details.  The routine tries to
2166  *      implement what is detailed there, though adjustments
2167  *      have been made.
2168  *
2169  **************************************************************/
2170
2171 static void
2172 tlan_reset_adapter(struct net_device *dev)
2173 {
2174         struct tlan_priv        *priv = netdev_priv(dev);
2175         int             i;
2176         u32             addr;
2177         u32             data;
2178         u8              data8;
2179
2180         priv->tlan_full_duplex = false;
2181         priv->phy_online = 0;
2182         netif_carrier_off(dev);
2183
2184 /*  1.  Assert reset bit. */
2185
2186         data = inl(dev->base_addr + TLAN_HOST_CMD);
2187         data |= TLAN_HC_AD_RST;
2188         outl(data, dev->base_addr + TLAN_HOST_CMD);
2189
2190         udelay(1000);
2191
2192 /*  2.  Turn off interrupts. (Probably isn't necessary) */
2193
2194         data = inl(dev->base_addr + TLAN_HOST_CMD);
2195         data |= TLAN_HC_INT_OFF;
2196         outl(data, dev->base_addr + TLAN_HOST_CMD);
2197
2198 /*  3.  Clear AREGs and HASHs. */
2199
2200         for (i = TLAN_AREG_0; i <= TLAN_HASH_2; i += 4)
2201                 tlan_dio_write32(dev->base_addr, (u16) i, 0);
2202
2203 /*  4.  Setup NetConfig register. */
2204
2205         data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN | TLAN_NET_CFG_PHY_EN;
2206         tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, (u16) data);
2207
2208 /*  5.  Load Ld_Tmr and Ld_Thr in HOST_CMD. */
2209
2210         outl(TLAN_HC_LD_TMR | 0x3f, dev->base_addr + TLAN_HOST_CMD);
2211         outl(TLAN_HC_LD_THR | 0x9, dev->base_addr + TLAN_HOST_CMD);
2212
2213 /*  6.  Unreset the MII by setting NMRST (in NetSio) to 1. */
2214
2215         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
2216         addr = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
2217         tlan_set_bit(TLAN_NET_SIO_NMRST, addr);
2218
2219 /*  7.  Setup the remaining registers. */
2220
2221         if (priv->tlan_rev >= 0x30) {
2222                 data8 = TLAN_ID_TX_EOC | TLAN_ID_RX_EOC;
2223                 tlan_dio_write8(dev->base_addr, TLAN_INT_DIS, data8);
2224         }
2225         tlan_phy_detect(dev);
2226         data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN;
2227
2228         if (priv->adapter->flags & TLAN_ADAPTER_BIT_RATE_PHY) {
2229                 data |= TLAN_NET_CFG_BIT;
2230                 if (priv->aui == 1) {
2231                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x0a);
2232                 } else if (priv->duplex == TLAN_DUPLEX_FULL) {
2233                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x00);
2234                         priv->tlan_full_duplex = true;
2235                 } else {
2236                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x08);
2237                 }
2238         }
2239
2240         if (priv->phy_num == 0)
2241                 data |= TLAN_NET_CFG_PHY_EN;
2242         tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, (u16) data);
2243
2244         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY)
2245                 tlan_finish_reset(dev);
2246         else
2247                 tlan_phy_power_down(dev);
2248
2249 }
2250
2251
2252
2253
2254 static void
2255 tlan_finish_reset(struct net_device *dev)
2256 {
2257         struct tlan_priv        *priv = netdev_priv(dev);
2258         u8              data;
2259         u32             phy;
2260         u8              sio;
2261         u16             status;
2262         u16             partner;
2263         u16             tlphy_ctl;
2264         u16             tlphy_par;
2265         u16             tlphy_id1, tlphy_id2;
2266         int             i;
2267
2268         phy = priv->phy[priv->phy_num];
2269
2270         data = TLAN_NET_CMD_NRESET | TLAN_NET_CMD_NWRAP;
2271         if (priv->tlan_full_duplex)
2272                 data |= TLAN_NET_CMD_DUPLEX;
2273         tlan_dio_write8(dev->base_addr, TLAN_NET_CMD, data);
2274         data = TLAN_NET_MASK_MASK4 | TLAN_NET_MASK_MASK5;
2275         if (priv->phy_num == 0)
2276                 data |= TLAN_NET_MASK_MASK7;
2277         tlan_dio_write8(dev->base_addr, TLAN_NET_MASK, data);
2278         tlan_dio_write16(dev->base_addr, TLAN_MAX_RX, ((1536)+7)&~7);
2279         tlan_mii_read_reg(dev, phy, MII_GEN_ID_HI, &tlphy_id1);
2280         tlan_mii_read_reg(dev, phy, MII_GEN_ID_LO, &tlphy_id2);
2281
2282         if ((priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) ||
2283             (priv->aui)) {
2284                 status = MII_GS_LINK;
2285                 netdev_info(dev, "Link forced\n");
2286         } else {
2287                 tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2288                 udelay(1000);
2289                 tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2290                 if (status & MII_GS_LINK) {
2291                         /* We only support link info on Nat.Sem. PHY's */
2292                         if ((tlphy_id1 == NAT_SEM_ID1) &&
2293                             (tlphy_id2 == NAT_SEM_ID2)) {
2294                                 tlan_mii_read_reg(dev, phy, MII_AN_LPA,
2295                                         &partner);
2296                                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_PAR,
2297                                         &tlphy_par);
2298
2299                                 netdev_info(dev,
2300                                         "Link active, %s %uMbps %s-Duplex\n",
2301                                         !(tlphy_par & TLAN_PHY_AN_EN_STAT)
2302                                         ? "forced" : "Autonegotiation enabled,",
2303                                         tlphy_par & TLAN_PHY_SPEED_100
2304                                         ? 100 : 10,
2305                                         tlphy_par & TLAN_PHY_DUPLEX_FULL
2306                                         ? "Full" : "Half");
2307
2308                                 if (tlphy_par & TLAN_PHY_AN_EN_STAT) {
2309                                         netdev_info(dev, "Partner capability:");
2310                                         for (i = 5; i < 10; i++)
2311                                                 if (partner & (1 << i))
2312                                                         pr_cont(" %s",
2313                                                                 media[i-5]);
2314                                         pr_cont("\n");
2315                                 }
2316                         } else
2317                                 netdev_info(dev, "Link active\n");
2318                         /* Enabling link beat monitoring */
2319                         priv->media_timer.function = tlan_phy_monitor;
2320                         priv->media_timer.data = (unsigned long) dev;
2321                         priv->media_timer.expires = jiffies + HZ;
2322                         add_timer(&priv->media_timer);
2323                 }
2324         }
2325
2326         if (priv->phy_num == 0) {
2327                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tlphy_ctl);
2328                 tlphy_ctl |= TLAN_TC_INTEN;
2329                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL, tlphy_ctl);
2330                 sio = tlan_dio_read8(dev->base_addr, TLAN_NET_SIO);
2331                 sio |= TLAN_NET_SIO_MINTEN;
2332                 tlan_dio_write8(dev->base_addr, TLAN_NET_SIO, sio);
2333         }
2334
2335         if (status & MII_GS_LINK) {
2336                 tlan_set_mac(dev, 0, dev->dev_addr);
2337                 priv->phy_online = 1;
2338                 outb((TLAN_HC_INT_ON >> 8), dev->base_addr + TLAN_HOST_CMD + 1);
2339                 if (debug >= 1 && debug != TLAN_DEBUG_PROBE)
2340                         outb((TLAN_HC_REQ_INT >> 8),
2341                              dev->base_addr + TLAN_HOST_CMD + 1);
2342                 outl(priv->rx_list_dma, dev->base_addr + TLAN_CH_PARM);
2343                 outl(TLAN_HC_GO | TLAN_HC_RT, dev->base_addr + TLAN_HOST_CMD);
2344                 tlan_dio_write8(dev->base_addr, TLAN_LED_REG, TLAN_LED_LINK);
2345                 netif_carrier_on(dev);
2346         } else {
2347                 netdev_info(dev, "Link inactive, will retry in 10 secs...\n");
2348                 tlan_set_timer(dev, (10*HZ), TLAN_TIMER_FINISH_RESET);
2349                 return;
2350         }
2351         tlan_set_multicast_list(dev);
2352
2353 }
2354
2355
2356
2357
2358 /***************************************************************
2359  *      tlan_set_mac
2360  *
2361  *      Returns:
2362  *              Nothing
2363  *      Parms:
2364  *              dev     Pointer to device structure of adapter
2365  *                      on which to change the AREG.
2366  *              areg    The AREG to set the address in (0 - 3).
2367  *              mac     A pointer to an array of chars.  Each
2368  *                      element stores one byte of the address.
2369  *                      IE, it isn't in ascii.
2370  *
2371  *      This function transfers a MAC address to one of the
2372  *      TLAN AREGs (address registers).  The TLAN chip locks
2373  *      the register on writing to offset 0 and unlocks the
2374  *      register after writing to offset 5.  If NULL is passed
2375  *      in mac, then the AREG is filled with 0's.
2376  *
2377  **************************************************************/
2378
2379 static void tlan_set_mac(struct net_device *dev, int areg, char *mac)
2380 {
2381         int i;
2382
2383         areg *= 6;
2384
2385         if (mac != NULL) {
2386                 for (i = 0; i < 6; i++)
2387                         tlan_dio_write8(dev->base_addr,
2388                                         TLAN_AREG_0 + areg + i, mac[i]);
2389         } else {
2390                 for (i = 0; i < 6; i++)
2391                         tlan_dio_write8(dev->base_addr,
2392                                         TLAN_AREG_0 + areg + i, 0);
2393         }
2394
2395 }
2396
2397
2398
2399
2400 /*****************************************************************************
2401 ******************************************************************************
2402
2403 ThunderLAN driver PHY layer routines
2404
2405 ******************************************************************************
2406 *****************************************************************************/
2407
2408
2409
2410 /*********************************************************************
2411  *      tlan_phy_print
2412  *
2413  *      Returns:
2414  *              Nothing
2415  *      Parms:
2416  *              dev     A pointer to the device structure of the
2417  *                      TLAN device having the PHYs to be detailed.
2418  *
2419  *      This function prints the registers a PHY (aka transceiver).
2420  *
2421  ********************************************************************/
2422
2423 static void tlan_phy_print(struct net_device *dev)
2424 {
2425         struct tlan_priv *priv = netdev_priv(dev);
2426         u16 i, data0, data1, data2, data3, phy;
2427
2428         phy = priv->phy[priv->phy_num];
2429
2430         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) {
2431                 netdev_info(dev, "Unmanaged PHY\n");
2432         } else if (phy <= TLAN_PHY_MAX_ADDR) {
2433                 netdev_info(dev, "PHY 0x%02x\n", phy);
2434                 pr_info("   Off.  +0     +1     +2     +3\n");
2435                 for (i = 0; i < 0x20; i += 4) {
2436                         tlan_mii_read_reg(dev, phy, i, &data0);
2437                         tlan_mii_read_reg(dev, phy, i + 1, &data1);
2438                         tlan_mii_read_reg(dev, phy, i + 2, &data2);
2439                         tlan_mii_read_reg(dev, phy, i + 3, &data3);
2440                         pr_info("   0x%02x 0x%04hx 0x%04hx 0x%04hx 0x%04hx\n",
2441                                 i, data0, data1, data2, data3);
2442                 }
2443         } else {
2444                 netdev_info(dev, "Invalid PHY\n");
2445         }
2446
2447 }
2448
2449
2450
2451
2452 /*********************************************************************
2453  *      tlan_phy_detect
2454  *
2455  *      Returns:
2456  *              Nothing
2457  *      Parms:
2458  *              dev     A pointer to the device structure of the adapter
2459  *                      for which the PHY needs determined.
2460  *
2461  *      So far I've found that adapters which have external PHYs
2462  *      may also use the internal PHY for part of the functionality.
2463  *      (eg, AUI/Thinnet).  This function finds out if this TLAN
2464  *      chip has an internal PHY, and then finds the first external
2465  *      PHY (starting from address 0) if it exists).
2466  *
2467  ********************************************************************/
2468
2469 static void tlan_phy_detect(struct net_device *dev)
2470 {
2471         struct tlan_priv *priv = netdev_priv(dev);
2472         u16             control;
2473         u16             hi;
2474         u16             lo;
2475         u32             phy;
2476
2477         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) {
2478                 priv->phy_num = 0xffff;
2479                 return;
2480         }
2481
2482         tlan_mii_read_reg(dev, TLAN_PHY_MAX_ADDR, MII_GEN_ID_HI, &hi);
2483
2484         if (hi != 0xffff)
2485                 priv->phy[0] = TLAN_PHY_MAX_ADDR;
2486         else
2487                 priv->phy[0] = TLAN_PHY_NONE;
2488
2489         priv->phy[1] = TLAN_PHY_NONE;
2490         for (phy = 0; phy <= TLAN_PHY_MAX_ADDR; phy++) {
2491                 tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &control);
2492                 tlan_mii_read_reg(dev, phy, MII_GEN_ID_HI, &hi);
2493                 tlan_mii_read_reg(dev, phy, MII_GEN_ID_LO, &lo);
2494                 if ((control != 0xffff) ||
2495                     (hi != 0xffff) || (lo != 0xffff)) {
2496                         TLAN_DBG(TLAN_DEBUG_GNRL,
2497                                  "PHY found at %02x %04x %04x %04x\n",
2498                                  phy, control, hi, lo);
2499                         if ((priv->phy[1] == TLAN_PHY_NONE) &&
2500                             (phy != TLAN_PHY_MAX_ADDR)) {
2501                                 priv->phy[1] = phy;
2502                         }
2503                 }
2504         }
2505
2506         if (priv->phy[1] != TLAN_PHY_NONE)
2507                 priv->phy_num = 1;
2508         else if (priv->phy[0] != TLAN_PHY_NONE)
2509                 priv->phy_num = 0;
2510         else
2511                 netdev_info(dev, "Cannot initialize device, no PHY was found!\n");
2512
2513 }
2514
2515
2516
2517
2518 static void tlan_phy_power_down(struct net_device *dev)
2519 {
2520         struct tlan_priv        *priv = netdev_priv(dev);
2521         u16             value;
2522
2523         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Powering down PHY(s).\n", dev->name);
2524         value = MII_GC_PDOWN | MII_GC_LOOPBK | MII_GC_ISOLATE;
2525         tlan_mii_sync(dev->base_addr);
2526         tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value);
2527         if ((priv->phy_num == 0) &&
2528             (priv->phy[1] != TLAN_PHY_NONE) &&
2529             (!(priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10))) {
2530                 tlan_mii_sync(dev->base_addr);
2531                 tlan_mii_write_reg(dev, priv->phy[1], MII_GEN_CTL, value);
2532         }
2533
2534         /* Wait for 50 ms and powerup
2535          * This is abitrary.  It is intended to make sure the
2536          * transceiver settles.
2537          */
2538         tlan_set_timer(dev, (HZ/20), TLAN_TIMER_PHY_PUP);
2539
2540 }
2541
2542
2543
2544
2545 static void tlan_phy_power_up(struct net_device *dev)
2546 {
2547         struct tlan_priv        *priv = netdev_priv(dev);
2548         u16             value;
2549
2550         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Powering up PHY.\n", dev->name);
2551         tlan_mii_sync(dev->base_addr);
2552         value = MII_GC_LOOPBK;
2553         tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value);
2554         tlan_mii_sync(dev->base_addr);
2555         /* Wait for 500 ms and reset the
2556          * transceiver.  The TLAN docs say both 50 ms and
2557          * 500 ms, so do the longer, just in case.
2558          */
2559         tlan_set_timer(dev, (HZ/20), TLAN_TIMER_PHY_RESET);
2560
2561 }
2562
2563
2564
2565
2566 static void tlan_phy_reset(struct net_device *dev)
2567 {
2568         struct tlan_priv        *priv = netdev_priv(dev);
2569         u16             phy;
2570         u16             value;
2571
2572         phy = priv->phy[priv->phy_num];
2573
2574         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Resetting PHY.\n", dev->name);
2575         tlan_mii_sync(dev->base_addr);
2576         value = MII_GC_LOOPBK | MII_GC_RESET;
2577         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, value);
2578         tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value);
2579         while (value & MII_GC_RESET)
2580                 tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value);
2581
2582         /* Wait for 500 ms and initialize.
2583          * I don't remember why I wait this long.
2584          * I've changed this to 50ms, as it seems long enough.
2585          */
2586         tlan_set_timer(dev, (HZ/20), TLAN_TIMER_PHY_START_LINK);
2587
2588 }
2589
2590
2591
2592
2593 static void tlan_phy_start_link(struct net_device *dev)
2594 {
2595         struct tlan_priv        *priv = netdev_priv(dev);
2596         u16             ability;
2597         u16             control;
2598         u16             data;
2599         u16             phy;
2600         u16             status;
2601         u16             tctl;
2602
2603         phy = priv->phy[priv->phy_num];
2604         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Trying to activate link.\n", dev->name);
2605         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2606         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &ability);
2607
2608         if ((status & MII_GS_AUTONEG) &&
2609             (!priv->aui)) {
2610                 ability = status >> 11;
2611                 if (priv->speed  == TLAN_SPEED_10 &&
2612                     priv->duplex == TLAN_DUPLEX_HALF) {
2613                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x0000);
2614                 } else if (priv->speed == TLAN_SPEED_10 &&
2615                            priv->duplex == TLAN_DUPLEX_FULL) {
2616                         priv->tlan_full_duplex = true;
2617                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x0100);
2618                 } else if (priv->speed == TLAN_SPEED_100 &&
2619                            priv->duplex == TLAN_DUPLEX_HALF) {
2620                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x2000);
2621                 } else if (priv->speed == TLAN_SPEED_100 &&
2622                            priv->duplex == TLAN_DUPLEX_FULL) {
2623                         priv->tlan_full_duplex = true;
2624                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x2100);
2625                 } else {
2626
2627                         /* Set Auto-Neg advertisement */
2628                         tlan_mii_write_reg(dev, phy, MII_AN_ADV,
2629                                            (ability << 5) | 1);
2630                         /* Enablee Auto-Neg */
2631                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x1000);
2632                         /* Restart Auto-Neg */
2633                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x1200);
2634                         /* Wait for 4 sec for autonegotiation
2635                          * to complete.  The max spec time is less than this
2636                          * but the card need additional time to start AN.
2637                          * .5 sec should be plenty extra.
2638                          */
2639                         netdev_info(dev, "Starting autonegotiation\n");
2640                         tlan_set_timer(dev, (2*HZ), TLAN_TIMER_PHY_FINISH_AN);
2641                         return;
2642                 }
2643
2644         }
2645
2646         if ((priv->aui) && (priv->phy_num != 0)) {
2647                 priv->phy_num = 0;
2648                 data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN
2649                         | TLAN_NET_CFG_PHY_EN;
2650                 tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, data);
2651                 tlan_set_timer(dev, (40*HZ/1000), TLAN_TIMER_PHY_PDOWN);
2652                 return;
2653         } else if (priv->phy_num == 0) {
2654                 control = 0;
2655                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tctl);
2656                 if (priv->aui) {
2657                         tctl |= TLAN_TC_AUISEL;
2658                 } else {
2659                         tctl &= ~TLAN_TC_AUISEL;
2660                         if (priv->duplex == TLAN_DUPLEX_FULL) {
2661                                 control |= MII_GC_DUPLEX;
2662                                 priv->tlan_full_duplex = true;
2663                         }
2664                         if (priv->speed == TLAN_SPEED_100)
2665                                 control |= MII_GC_SPEEDSEL;
2666                 }
2667                 tlan_mii_write_reg(dev, phy, MII_GEN_CTL, control);
2668                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL, tctl);
2669         }
2670
2671         /* Wait for 2 sec to give the transceiver time
2672          * to establish link.
2673          */
2674         tlan_set_timer(dev, (4*HZ), TLAN_TIMER_FINISH_RESET);
2675
2676 }
2677
2678
2679
2680
2681 static void tlan_phy_finish_auto_neg(struct net_device *dev)
2682 {
2683         struct tlan_priv        *priv = netdev_priv(dev);
2684         u16             an_adv;
2685         u16             an_lpa;
2686         u16             data;
2687         u16             mode;
2688         u16             phy;
2689         u16             status;
2690
2691         phy = priv->phy[priv->phy_num];
2692
2693         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2694         udelay(1000);
2695         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2696
2697         if (!(status & MII_GS_AUTOCMPLT)) {
2698                 /* Wait for 8 sec to give the process
2699                  * more time.  Perhaps we should fail after a while.
2700                  */
2701                 tlan_set_timer(dev, 2 * HZ, TLAN_TIMER_PHY_FINISH_AN);
2702                 return;
2703         }
2704
2705         netdev_info(dev, "Autonegotiation complete\n");
2706         tlan_mii_read_reg(dev, phy, MII_AN_ADV, &an_adv);
2707         tlan_mii_read_reg(dev, phy, MII_AN_LPA, &an_lpa);
2708         mode = an_adv & an_lpa & 0x03E0;
2709         if (mode & 0x0100)
2710                 priv->tlan_full_duplex = true;
2711         else if (!(mode & 0x0080) && (mode & 0x0040))
2712                 priv->tlan_full_duplex = true;
2713
2714         /* switch to internal PHY for 10 Mbps */
2715         if ((!(mode & 0x0180)) &&
2716             (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) &&
2717             (priv->phy_num != 0)) {
2718                 priv->phy_num = 0;
2719                 data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN
2720                         | TLAN_NET_CFG_PHY_EN;
2721                 tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, data);
2722                 tlan_set_timer(dev, (400*HZ/1000), TLAN_TIMER_PHY_PDOWN);
2723                 return;
2724         }
2725
2726         if (priv->phy_num == 0) {
2727                 if ((priv->duplex == TLAN_DUPLEX_FULL) ||
2728                     (an_adv & an_lpa & 0x0040)) {
2729                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL,
2730                                            MII_GC_AUTOENB | MII_GC_DUPLEX);
2731                         netdev_info(dev, "Starting internal PHY with FULL-DUPLEX\n");
2732                 } else {
2733                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL,
2734                                            MII_GC_AUTOENB);
2735                         netdev_info(dev, "Starting internal PHY with HALF-DUPLEX\n");
2736                 }
2737         }
2738
2739         /* Wait for 100 ms.  No reason in partiticular.
2740          */
2741         tlan_set_timer(dev, (HZ/10), TLAN_TIMER_FINISH_RESET);
2742
2743 }
2744
2745
2746 /*********************************************************************
2747  *
2748  *     tlan_phy_monitor
2749  *
2750  *     Returns:
2751  *            None
2752  *
2753  *     Params:
2754  *            data           The device structure of this device.
2755  *
2756  *
2757  *     This function monitors PHY condition by reading the status
2758  *     register via the MII bus, controls LINK LED and notifies the
2759  *     kernel about link state.
2760  *
2761  *******************************************************************/
2762
2763 static void tlan_phy_monitor(unsigned long data)
2764 {
2765         struct net_device *dev = (struct net_device *) data;
2766         struct tlan_priv *priv = netdev_priv(dev);
2767         u16     phy;
2768         u16     phy_status;
2769
2770         phy = priv->phy[priv->phy_num];
2771
2772         /* Get PHY status register */
2773         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &phy_status);
2774
2775         /* Check if link has been lost */
2776         if (!(phy_status & MII_GS_LINK)) {
2777                 if (netif_carrier_ok(dev)) {
2778                         printk(KERN_DEBUG "TLAN: %s has lost link\n",
2779                                dev->name);
2780                         tlan_dio_write8(dev->base_addr, TLAN_LED_REG, 0);
2781                         netif_carrier_off(dev);
2782                         if (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) {
2783                                 /* power down internal PHY */
2784                                 u16 data = MII_GC_PDOWN | MII_GC_LOOPBK |
2785                                            MII_GC_ISOLATE;
2786
2787                                 tlan_mii_sync(dev->base_addr);
2788                                 tlan_mii_write_reg(dev, priv->phy[0],
2789                                                    MII_GEN_CTL, data);
2790                                 /* set to external PHY */
2791                                 priv->phy_num = 1;
2792                                 /* restart autonegotiation */
2793                                 tlan_set_timer(dev, 4 * HZ / 10,
2794                                                TLAN_TIMER_PHY_PDOWN);
2795                                 return;
2796                         }
2797                 }
2798         }
2799
2800         /* Link restablished? */
2801         if ((phy_status & MII_GS_LINK) && !netif_carrier_ok(dev)) {
2802                 tlan_dio_write8(dev->base_addr, TLAN_LED_REG, TLAN_LED_LINK);
2803                 printk(KERN_DEBUG "TLAN: %s has reestablished link\n",
2804                        dev->name);
2805                 netif_carrier_on(dev);
2806         }
2807         priv->media_timer.expires = jiffies + HZ;
2808         add_timer(&priv->media_timer);
2809 }
2810
2811
2812 /*****************************************************************************
2813 ******************************************************************************
2814
2815 ThunderLAN driver MII routines
2816
2817 these routines are based on the information in chap. 2 of the
2818 "ThunderLAN Programmer's Guide", pp. 15-24.
2819
2820 ******************************************************************************
2821 *****************************************************************************/
2822
2823
2824 /***************************************************************
2825  *      tlan_mii_read_reg
2826  *
2827  *      Returns:
2828  *              false   if ack received ok
2829  *              true    if no ack received or other error
2830  *
2831  *      Parms:
2832  *              dev             The device structure containing
2833  *                              The io address and interrupt count
2834  *                              for this device.
2835  *              phy             The address of the PHY to be queried.
2836  *              reg             The register whose contents are to be
2837  *                              retrieved.
2838  *              val             A pointer to a variable to store the
2839  *                              retrieved value.
2840  *
2841  *      This function uses the TLAN's MII bus to retrieve the contents
2842  *      of a given register on a PHY.  It sends the appropriate info
2843  *      and then reads the 16-bit register value from the MII bus via
2844  *      the TLAN SIO register.
2845  *
2846  **************************************************************/
2847
2848 static bool
2849 tlan_mii_read_reg(struct net_device *dev, u16 phy, u16 reg, u16 *val)
2850 {
2851         u8      nack;
2852         u16     sio, tmp;
2853         u32     i;
2854         bool    err;
2855         int     minten;
2856         struct tlan_priv *priv = netdev_priv(dev);
2857         unsigned long flags = 0;
2858
2859         err = false;
2860         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
2861         sio = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
2862
2863         if (!in_irq())
2864                 spin_lock_irqsave(&priv->lock, flags);
2865
2866         tlan_mii_sync(dev->base_addr);
2867
2868         minten = tlan_get_bit(TLAN_NET_SIO_MINTEN, sio);
2869         if (minten)
2870                 tlan_clear_bit(TLAN_NET_SIO_MINTEN, sio);
2871
2872         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* start (01b) */
2873         tlan_mii_send_data(dev->base_addr, 0x2, 2);     /* read  (10b) */
2874         tlan_mii_send_data(dev->base_addr, phy, 5);     /* device #      */
2875         tlan_mii_send_data(dev->base_addr, reg, 5);     /* register #    */
2876
2877
2878         tlan_clear_bit(TLAN_NET_SIO_MTXEN, sio);        /* change direction */
2879
2880         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* clock idle bit */
2881         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2882         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* wait 300ns */
2883
2884         nack = tlan_get_bit(TLAN_NET_SIO_MDATA, sio);   /* check for ACK */
2885         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);           /* finish ACK */
2886         if (nack) {                                     /* no ACK, so fake it */
2887                 for (i = 0; i < 16; i++) {
2888                         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2889                         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2890                 }
2891                 tmp = 0xffff;
2892                 err = true;
2893         } else {                                        /* ACK, so read data */
2894                 for (tmp = 0, i = 0x8000; i; i >>= 1) {
2895                         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2896                         if (tlan_get_bit(TLAN_NET_SIO_MDATA, sio))
2897                                 tmp |= i;
2898                         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2899                 }
2900         }
2901
2902
2903         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* idle cycle */
2904         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2905
2906         if (minten)
2907                 tlan_set_bit(TLAN_NET_SIO_MINTEN, sio);
2908
2909         *val = tmp;
2910
2911         if (!in_irq())
2912                 spin_unlock_irqrestore(&priv->lock, flags);
2913
2914         return err;
2915
2916 }
2917
2918
2919
2920
2921 /***************************************************************
2922  *      tlan_mii_send_data
2923  *
2924  *      Returns:
2925  *              Nothing
2926  *      Parms:
2927  *              base_port       The base IO port of the adapter in
2928  *                              question.
2929  *              dev             The address of the PHY to be queried.
2930  *              data            The value to be placed on the MII bus.
2931  *              num_bits        The number of bits in data that are to
2932  *                              be placed on the MII bus.
2933  *
2934  *      This function sends on sequence of bits on the MII
2935  *      configuration bus.
2936  *
2937  **************************************************************/
2938
2939 static void tlan_mii_send_data(u16 base_port, u32 data, unsigned num_bits)
2940 {
2941         u16 sio;
2942         u32 i;
2943
2944         if (num_bits == 0)
2945                 return;
2946
2947         outw(TLAN_NET_SIO, base_port + TLAN_DIO_ADR);
2948         sio = base_port + TLAN_DIO_DATA + TLAN_NET_SIO;
2949         tlan_set_bit(TLAN_NET_SIO_MTXEN, sio);
2950
2951         for (i = (0x1 << (num_bits - 1)); i; i >>= 1) {
2952                 tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2953                 (void) tlan_get_bit(TLAN_NET_SIO_MCLK, sio);
2954                 if (data & i)
2955                         tlan_set_bit(TLAN_NET_SIO_MDATA, sio);
2956                 else
2957                         tlan_clear_bit(TLAN_NET_SIO_MDATA, sio);
2958                 tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2959                 (void) tlan_get_bit(TLAN_NET_SIO_MCLK, sio);
2960         }
2961
2962 }
2963
2964
2965
2966
2967 /***************************************************************
2968  *      TLan_MiiSync
2969  *
2970  *      Returns:
2971  *              Nothing
2972  *      Parms:
2973  *              base_port       The base IO port of the adapter in
2974  *                              question.
2975  *
2976  *      This functions syncs all PHYs in terms of the MII configuration
2977  *      bus.
2978  *
2979  **************************************************************/
2980
2981 static void tlan_mii_sync(u16 base_port)
2982 {
2983         int i;
2984         u16 sio;
2985
2986         outw(TLAN_NET_SIO, base_port + TLAN_DIO_ADR);
2987         sio = base_port + TLAN_DIO_DATA + TLAN_NET_SIO;
2988
2989         tlan_clear_bit(TLAN_NET_SIO_MTXEN, sio);
2990         for (i = 0; i < 32; i++) {
2991                 tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2992                 tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2993         }
2994
2995 }
2996
2997
2998
2999
3000 /***************************************************************
3001  *      tlan_mii_write_reg
3002  *
3003  *      Returns:
3004  *              Nothing
3005  *      Parms:
3006  *              dev             The device structure for the device
3007  *                              to write to.
3008  *              phy             The address of the PHY to be written to.
3009  *              reg             The register whose contents are to be
3010  *                              written.
3011  *              val             The value to be written to the register.
3012  *
3013  *      This function uses the TLAN's MII bus to write the contents of a
3014  *      given register on a PHY.  It sends the appropriate info and then
3015  *      writes the 16-bit register value from the MII configuration bus
3016  *      via the TLAN SIO register.
3017  *
3018  **************************************************************/
3019
3020 static void
3021 tlan_mii_write_reg(struct net_device *dev, u16 phy, u16 reg, u16 val)
3022 {
3023         u16     sio;
3024         int     minten;
3025         unsigned long flags = 0;
3026         struct tlan_priv *priv = netdev_priv(dev);
3027
3028         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
3029         sio = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
3030
3031         if (!in_irq())
3032                 spin_lock_irqsave(&priv->lock, flags);
3033
3034         tlan_mii_sync(dev->base_addr);
3035
3036         minten = tlan_get_bit(TLAN_NET_SIO_MINTEN, sio);
3037         if (minten)
3038                 tlan_clear_bit(TLAN_NET_SIO_MINTEN, sio);
3039
3040         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* start (01b) */
3041         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* write (01b) */
3042         tlan_mii_send_data(dev->base_addr, phy, 5);     /* device #      */
3043         tlan_mii_send_data(dev->base_addr, reg, 5);     /* register #    */
3044
3045         tlan_mii_send_data(dev->base_addr, 0x2, 2);     /* send ACK */
3046         tlan_mii_send_data(dev->base_addr, val, 16);    /* send data */
3047
3048         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio); /* idle cycle */
3049         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
3050
3051         if (minten)
3052                 tlan_set_bit(TLAN_NET_SIO_MINTEN, sio);
3053
3054         if (!in_irq())
3055                 spin_unlock_irqrestore(&priv->lock, flags);
3056
3057 }
3058
3059
3060
3061
3062 /*****************************************************************************
3063 ******************************************************************************
3064
3065 ThunderLAN driver eeprom routines
3066
3067 the Compaq netelligent 10 and 10/100 cards use a microchip 24C02A
3068 EEPROM.  these functions are based on information in microchip's
3069 data sheet.  I don't know how well this functions will work with
3070 other Eeproms.
3071
3072 ******************************************************************************
3073 *****************************************************************************/
3074
3075
3076 /***************************************************************
3077  *      tlan_ee_send_start
3078  *
3079  *      Returns:
3080  *              Nothing
3081  *      Parms:
3082  *              io_base         The IO port base address for the
3083  *                              TLAN device with the EEPROM to
3084  *                              use.
3085  *
3086  *      This function sends a start cycle to an EEPROM attached
3087  *      to a TLAN chip.
3088  *
3089  **************************************************************/
3090
3091 static void tlan_ee_send_start(u16 io_base)
3092 {
3093         u16     sio;
3094
3095         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3096         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3097
3098         tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3099         tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3100         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3101         tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3102         tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3103
3104 }
3105
3106
3107
3108
3109 /***************************************************************
3110  *      tlan_ee_send_byte
3111  *
3112  *      Returns:
3113  *              If the correct ack was received, 0, otherwise 1
3114  *      Parms:  io_base         The IO port base address for the
3115  *                              TLAN device with the EEPROM to
3116  *                              use.
3117  *              data            The 8 bits of information to
3118  *                              send to the EEPROM.
3119  *              stop            If TLAN_EEPROM_STOP is passed, a
3120  *                              stop cycle is sent after the
3121  *                              byte is sent after the ack is
3122  *                              read.
3123  *
3124  *      This function sends a byte on the serial EEPROM line,
3125  *      driving the clock to send each bit. The function then
3126  *      reverses transmission direction and reads an acknowledge
3127  *      bit.
3128  *
3129  **************************************************************/
3130
3131 static int tlan_ee_send_byte(u16 io_base, u8 data, int stop)
3132 {
3133         int     err;
3134         u8      place;
3135         u16     sio;
3136
3137         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3138         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3139
3140         /* Assume clock is low, tx is enabled; */
3141         for (place = 0x80; place != 0; place >>= 1) {
3142                 if (place & data)
3143                         tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3144                 else
3145                         tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3146                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3147                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3148         }
3149         tlan_clear_bit(TLAN_NET_SIO_ETXEN, sio);
3150         tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3151         err = tlan_get_bit(TLAN_NET_SIO_EDATA, sio);
3152         tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3153         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3154
3155         if ((!err) && stop) {
3156                 /* STOP, raise data while clock is high */
3157                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3158                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3159                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3160         }
3161
3162         return err;
3163
3164 }
3165
3166
3167
3168
3169 /***************************************************************
3170  *      tlan_ee_receive_byte
3171  *
3172  *      Returns:
3173  *              Nothing
3174  *      Parms:
3175  *              io_base         The IO port base address for the
3176  *                              TLAN device with the EEPROM to
3177  *                              use.
3178  *              data            An address to a char to hold the
3179  *                              data sent from the EEPROM.
3180  *              stop            If TLAN_EEPROM_STOP is passed, a
3181  *                              stop cycle is sent after the
3182  *                              byte is received, and no ack is
3183  *                              sent.
3184  *
3185  *      This function receives 8 bits of data from the EEPROM
3186  *      over the serial link.  It then sends and ack bit, or no
3187  *      ack and a stop bit.  This function is used to retrieve
3188  *      data after the address of a byte in the EEPROM has been
3189  *      sent.
3190  *
3191  **************************************************************/
3192
3193 static void tlan_ee_receive_byte(u16 io_base, u8 *data, int stop)
3194 {
3195         u8  place;
3196         u16 sio;
3197
3198         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3199         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3200         *data = 0;
3201
3202         /* Assume clock is low, tx is enabled; */
3203         tlan_clear_bit(TLAN_NET_SIO_ETXEN, sio);
3204         for (place = 0x80; place; place >>= 1) {
3205                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3206                 if (tlan_get_bit(TLAN_NET_SIO_EDATA, sio))
3207                         *data |= place;
3208                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3209         }
3210
3211         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3212         if (!stop) {
3213                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio); /* ack = 0 */
3214                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3215                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3216         } else {
3217                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);  /* no ack = 1 (?) */
3218                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3219                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3220                 /* STOP, raise data while clock is high */
3221                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3222                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3223                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3224         }
3225
3226 }
3227
3228
3229
3230
3231 /***************************************************************
3232  *      tlan_ee_read_byte
3233  *
3234  *      Returns:
3235  *              No error = 0, else, the stage at which the error
3236  *              occurred.
3237  *      Parms:
3238  *              io_base         The IO port base address for the
3239  *                              TLAN device with the EEPROM to
3240  *                              use.
3241  *              ee_addr         The address of the byte in the
3242  *                              EEPROM whose contents are to be
3243  *                              retrieved.
3244  *              data            An address to a char to hold the
3245  *                              data obtained from the EEPROM.
3246  *
3247  *      This function reads a byte of information from an byte
3248  *      cell in the EEPROM.
3249  *
3250  **************************************************************/
3251
3252 static int tlan_ee_read_byte(struct net_device *dev, u8 ee_addr, u8 *data)
3253 {
3254         int err;
3255         struct tlan_priv *priv = netdev_priv(dev);
3256         unsigned long flags = 0;
3257         int ret = 0;
3258
3259         spin_lock_irqsave(&priv->lock, flags);
3260
3261         tlan_ee_send_start(dev->base_addr);
3262         err = tlan_ee_send_byte(dev->base_addr, 0xa0, TLAN_EEPROM_ACK);
3263         if (err) {
3264                 ret = 1;
3265                 goto fail;
3266         }
3267         err = tlan_ee_send_byte(dev->base_addr, ee_addr, TLAN_EEPROM_ACK);
3268         if (err) {
3269                 ret = 2;
3270                 goto fail;
3271         }
3272         tlan_ee_send_start(dev->base_addr);
3273         err = tlan_ee_send_byte(dev->base_addr, 0xa1, TLAN_EEPROM_ACK);
3274         if (err) {
3275                 ret = 3;
3276                 goto fail;
3277         }
3278         tlan_ee_receive_byte(dev->base_addr, data, TLAN_EEPROM_STOP);
3279 fail:
3280         spin_unlock_irqrestore(&priv->lock, flags);
3281
3282         return ret;
3283
3284 }
3285
3286
3287