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 const struct pci_device_id 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         cancel_work_sync(&priv->tlan_tqueue);
 317         free_netdev(dev);
 318 }
 319
 320 static void tlan_start(struct net_device *dev)
 321 {
 322         tlan_reset_lists(dev);
 323         /* NOTE: It might not be necessary to read the stats before a
 324            reset if you don't care what the values are.
 325         */
 326         tlan_read_and_clear_stats(dev, TLAN_IGNORE);
 327         tlan_reset_adapter(dev);
 328         netif_wake_queue(dev);
 329 }
 330
 331 static void tlan_stop(struct net_device *dev)
 332 {
 333         struct tlan_priv *priv = netdev_priv(dev);
 334
 335         del_timer_sync(&priv->media_timer);
 336         tlan_read_and_clear_stats(dev, TLAN_RECORD);
 337         outl(TLAN_HC_AD_RST, dev->base_addr + TLAN_HOST_CMD);
 338         /* Reset and power down phy */
 339         tlan_reset_adapter(dev);
 340         if (priv->timer.function != NULL) {
 341                 del_timer_sync(&priv->timer);
 342                 priv->timer.function = NULL;
 343         }
 344 }
 345
 346 #ifdef CONFIG_PM
 347
 348 static int tlan_suspend(struct pci_dev *pdev, pm_message_t state)
 349 {
 350         struct net_device *dev = pci_get_drvdata(pdev);
 351
 352         if (netif_running(dev))
 353                 tlan_stop(dev);
 354
 355         netif_device_detach(dev);
 356         pci_save_state(pdev);
 357         pci_disable_device(pdev);
 358         pci_wake_from_d3(pdev, false);
 359         pci_set_power_state(pdev, PCI_D3hot);
 360
 361         return 0;
 362 }
 363
 364 static int tlan_resume(struct pci_dev *pdev)
 365 {
 366         struct net_device *dev = pci_get_drvdata(pdev);
 367         int rc = pci_enable_device(pdev);
 368
 369         if (rc)
 370                 return rc;
 371         pci_restore_state(pdev);
 372         pci_enable_wake(pdev, PCI_D0, 0);
 373         netif_device_attach(dev);
 374
 375         if (netif_running(dev))
 376                 tlan_start(dev);
 377
 378         return 0;
 379 }
 380
 381 #else /* CONFIG_PM */
 382
 383 #define tlan_suspend   NULL
 384 #define tlan_resume    NULL
 385
 386 #endif /* CONFIG_PM */
 387
 388
 389 static struct pci_driver tlan_driver = {
 390         .name           = "tlan",
 391         .id_table       = tlan_pci_tbl,
 392         .probe          = tlan_init_one,
 393         .remove         = tlan_remove_one,
 394         .suspend        = tlan_suspend,
 395         .resume         = tlan_resume,
 396 };
 397
 398 static int __init tlan_probe(void)
 399 {
 400         int rc = -ENODEV;
 401
 402         pr_info("%s", tlan_banner);
 403
 404         TLAN_DBG(TLAN_DEBUG_PROBE, "Starting PCI Probe....\n");
 405
 406         /* Use new style PCI probing. Now the kernel will
 407            do most of this for us */
 408         rc = pci_register_driver(&tlan_driver);
 409
 410         if (rc != 0) {
 411                 pr_err("Could not register pci driver\n");
 412                 goto err_out_pci_free;
 413         }
 414
 415         TLAN_DBG(TLAN_DEBUG_PROBE, "Starting EISA Probe....\n");
 416         tlan_eisa_probe();
 417
 418         pr_info("%d device%s installed, PCI: %d  EISA: %d\n",
 419                 tlan_devices_installed, tlan_devices_installed == 1 ? "" : "s",
 420                 tlan_have_pci, tlan_have_eisa);
 421
 422         if (tlan_devices_installed == 0) {
 423                 rc = -ENODEV;
 424                 goto  err_out_pci_unreg;
 425         }
 426         return 0;
 427
 428 err_out_pci_unreg:
 429         pci_unregister_driver(&tlan_driver);
 430 err_out_pci_free:
 431         return rc;
 432 }
 433
 434
 435 static int tlan_init_one(struct pci_dev *pdev,
 436                                    const struct pci_device_id *ent)
 437 {
 438         return tlan_probe1(pdev, -1, -1, 0, ent);
 439 }
 440
 441
 442 /*
 443 ***************************************************************
 444 *       tlan_probe1
 445 *
 446 *       Returns:
 447 *               0 on success, error code on error
 448 *       Parms:
 449 *               none
 450 *
 451 *       The name is lower case to fit in with all the rest of
 452 *       the netcard_probe names.  This function looks for
 453 *       another TLan based adapter, setting it up with the
 454 *       allocated device struct if one is found.
 455 *       tlan_probe has been ported to the new net API and
 456 *       now allocates its own device structure. This function
 457 *       is also used by modules.
 458 *
 459 **************************************************************/
 460
 461 static int tlan_probe1(struct pci_dev *pdev, long ioaddr, int irq, int rev,
 462                        const struct pci_device_id *ent)
 463 {
 464
 465         struct net_device  *dev;
 466         struct tlan_priv  *priv;
 467         u16                device_id;
 468         int                reg, rc = -ENODEV;
 469
 470 #ifdef CONFIG_PCI
 471         if (pdev) {
 472                 rc = pci_enable_device(pdev);
 473                 if (rc)
 474                         return rc;
 475
 476                 rc = pci_request_regions(pdev, tlan_signature);
 477                 if (rc) {
 478                         pr_err("Could not reserve IO regions\n");
 479                         goto err_out;
 480                 }
 481         }
 482 #endif  /*  CONFIG_PCI  */
 483
 484         dev = alloc_etherdev(sizeof(struct tlan_priv));
 485         if (dev == NULL) {
 486                 rc = -ENOMEM;
 487                 goto err_out_regions;
 488         }
 489         SET_NETDEV_DEV(dev, &pdev->dev);
 490
 491         priv = netdev_priv(dev);
 492
 493         priv->pci_dev = pdev;
 494         priv->dev = dev;
 495
 496         /* Is this a PCI device? */
 497         if (pdev) {
 498                 u32                pci_io_base = 0;
 499
 500                 priv->adapter = &board_info[ent->driver_data];
 501
 502                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 503                 if (rc) {
 504                         pr_err("No suitable PCI mapping available\n");
 505                         goto err_out_free_dev;
 506                 }
 507
 508                 for (reg = 0; reg <= 5; reg++) {
 509                         if (pci_resource_flags(pdev, reg) & IORESOURCE_IO) {
 510                                 pci_io_base = pci_resource_start(pdev, reg);
 511                                 TLAN_DBG(TLAN_DEBUG_GNRL,
 512                                          "IO mapping is available at %x.\n",
 513                                          pci_io_base);
 514                                 break;
 515                         }
 516                 }
 517                 if (!pci_io_base) {
 518                         pr_err("No IO mappings available\n");
 519                         rc = -EIO;
 520                         goto err_out_free_dev;
 521                 }
 522
 523                 dev->base_addr = pci_io_base;
 524                 dev->irq = pdev->irq;
 525                 priv->adapter_rev = pdev->revision;
 526                 pci_set_master(pdev);
 527                 pci_set_drvdata(pdev, dev);
 528
 529         } else  {     /* EISA card */
 530                 /* This is a hack. We need to know which board structure
 531                  * is suited for this adapter */
 532                 device_id = inw(ioaddr + EISA_ID2);
 533                 if (device_id == 0x20F1) {
 534                         priv->adapter = &board_info[13]; /* NetFlex-3/E */
 535                         priv->adapter_rev = 23;         /* TLAN 2.3 */
 536                 } else {
 537                         priv->adapter = &board_info[14];
 538                         priv->adapter_rev = 10;         /* TLAN 1.0 */
 539                 }
 540                 dev->base_addr = ioaddr;
 541                 dev->irq = irq;
 542         }
 543
 544         /* Kernel parameters */
 545         if (dev->mem_start) {
 546                 priv->aui    = dev->mem_start & 0x01;
 547                 priv->duplex = ((dev->mem_start & 0x06) == 0x06) ? 0
 548                         : (dev->mem_start & 0x06) >> 1;
 549                 priv->speed  = ((dev->mem_start & 0x18) == 0x18) ? 0
 550                         : (dev->mem_start & 0x18) >> 3;
 551
 552                 if (priv->speed == 0x1)
 553                         priv->speed = TLAN_SPEED_10;
 554                 else if (priv->speed == 0x2)
 555                         priv->speed = TLAN_SPEED_100;
 556
 557                 debug = priv->debug = dev->mem_end;
 558         } else {
 559                 priv->aui    = aui[boards_found];
 560                 priv->speed  = speed[boards_found];
 561                 priv->duplex = duplex[boards_found];
 562                 priv->debug = debug;
 563         }
 564
 565         /* This will be used when we get an adapter error from
 566          * within our irq handler */
 567         INIT_WORK(&priv->tlan_tqueue, tlan_tx_timeout_work);
 568
 569         spin_lock_init(&priv->lock);
 570
 571         rc = tlan_init(dev);
 572         if (rc) {
 573                 pr_err("Could not set up device\n");
 574                 goto err_out_free_dev;
 575         }
 576
 577         rc = register_netdev(dev);
 578         if (rc) {
 579                 pr_err("Could not register device\n");
 580                 goto err_out_uninit;
 581         }
 582
 583
 584         tlan_devices_installed++;
 585         boards_found++;
 586
 587         /* pdev is NULL if this is an EISA device */
 588         if (pdev)
 589                 tlan_have_pci++;
 590         else {
 591                 priv->next_device = tlan_eisa_devices;
 592                 tlan_eisa_devices = dev;
 593                 tlan_have_eisa++;
 594         }
 595
 596         netdev_info(dev, "irq=%2d, io=%04x, %s, Rev. %d\n",
 597                     (int)dev->irq,
 598                     (int)dev->base_addr,
 599                     priv->adapter->device_label,
 600                     priv->adapter_rev);
 601         return 0;
 602
 603 err_out_uninit:
 604         pci_free_consistent(priv->pci_dev, priv->dma_size, priv->dma_storage,
 605                             priv->dma_storage_dma);
 606 err_out_free_dev:
 607         free_netdev(dev);
 608 err_out_regions:
 609 #ifdef CONFIG_PCI
 610         if (pdev)
 611                 pci_release_regions(pdev);
 612 err_out:
 613 #endif
 614         if (pdev)
 615                 pci_disable_device(pdev);
 616         return rc;
 617 }
 618
 619
 620 static void tlan_eisa_cleanup(void)
 621 {
 622         struct net_device *dev;
 623         struct tlan_priv *priv;
 624
 625         while (tlan_have_eisa) {
 626                 dev = tlan_eisa_devices;
 627                 priv = netdev_priv(dev);
 628                 if (priv->dma_storage) {
 629                         pci_free_consistent(priv->pci_dev, priv->dma_size,
 630                                             priv->dma_storage,
 631                                             priv->dma_storage_dma);
 632                 }
 633                 release_region(dev->base_addr, 0x10);
 634                 unregister_netdev(dev);
 635                 tlan_eisa_devices = priv->next_device;
 636                 free_netdev(dev);
 637                 tlan_have_eisa--;
 638         }
 639 }
 640
 641
 642 static void __exit tlan_exit(void)
 643 {
 644         pci_unregister_driver(&tlan_driver);
 645
 646         if (tlan_have_eisa)
 647                 tlan_eisa_cleanup();
 648
 649 }
 650
 651
 652 /* Module loading/unloading */
 653 module_init(tlan_probe);
 654 module_exit(tlan_exit);
 655
 656
 657
 658 /**************************************************************
 659  *      tlan_eisa_probe
 660  *
 661  *      Returns: 0 on success, 1 otherwise
 662  *
 663  *      Parms:   None
 664  *
 665  *
 666  *      This functions probes for EISA devices and calls
 667  *      TLan_probe1 when one is found.
 668  *
 669  *************************************************************/
 670
 671 static void  __init tlan_eisa_probe(void)
 672 {
 673         long    ioaddr;
 674         int     rc = -ENODEV;
 675         int     irq;
 676         u16     device_id;
 677
 678         if (!EISA_bus) {
 679                 TLAN_DBG(TLAN_DEBUG_PROBE, "No EISA bus present\n");
 680                 return;
 681         }
 682
 683         /* Loop through all slots of the EISA bus */
 684         for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
 685
 686                 TLAN_DBG(TLAN_DEBUG_PROBE, "EISA_ID 0x%4x: 0x%4x\n",
 687                          (int) ioaddr + 0xc80, inw(ioaddr + EISA_ID));
 688                 TLAN_DBG(TLAN_DEBUG_PROBE, "EISA_ID 0x%4x: 0x%4x\n",
 689                          (int) ioaddr + 0xc82, inw(ioaddr + EISA_ID2));
 690
 691
 692                 TLAN_DBG(TLAN_DEBUG_PROBE,
 693                          "Probing for EISA adapter at IO: 0x%4x : ",
 694                          (int) ioaddr);
 695                 if (request_region(ioaddr, 0x10, tlan_signature) == NULL)
 696                         goto out;
 697
 698                 if (inw(ioaddr + EISA_ID) != 0x110E) {
 699                         release_region(ioaddr, 0x10);
 700                         goto out;
 701                 }
 702
 703                 device_id = inw(ioaddr + EISA_ID2);
 704                 if (device_id !=  0x20F1 && device_id != 0x40F1) {
 705                         release_region(ioaddr, 0x10);
 706                         goto out;
 707                 }
 708
 709                 /* check if adapter is enabled */
 710                 if (inb(ioaddr + EISA_CR) != 0x1) {
 711                         release_region(ioaddr, 0x10);
 712                         goto out2;
 713                 }
 714
 715                 if (debug == 0x10)
 716                         pr_info("Found one\n");
 717
 718
 719                 /* Get irq from board */
 720                 switch (inb(ioaddr + 0xcc0)) {
 721                 case(0x10):
 722                         irq = 5;
 723                         break;
 724                 case(0x20):
 725                         irq = 9;
 726                         break;
 727                 case(0x40):
 728                         irq = 10;
 729                         break;
 730                 case(0x80):
 731                         irq = 11;
 732                         break;
 733                 default:
 734                         goto out;
 735                 }
 736
 737
 738                 /* Setup the newly found eisa adapter */
 739                 rc = tlan_probe1(NULL, ioaddr, irq,
 740                                  12, NULL);
 741                 continue;
 742
 743 out:
 744                 if (debug == 0x10)
 745                         pr_info("None found\n");
 746                 continue;
 747
 748 out2:
 749                 if (debug == 0x10)
 750                         pr_info("Card found but it is not enabled, skipping\n");
 751                 continue;
 752
 753         }
 754
 755 }
 756
 757 #ifdef CONFIG_NET_POLL_CONTROLLER
 758 static void tlan_poll(struct net_device *dev)
 759 {
 760         disable_irq(dev->irq);
 761         tlan_handle_interrupt(dev->irq, dev);
 762         enable_irq(dev->irq);
 763 }
 764 #endif
 765
 766 static const struct net_device_ops tlan_netdev_ops = {
 767         .ndo_open               = tlan_open,
 768         .ndo_stop               = tlan_close,
 769         .ndo_start_xmit         = tlan_start_tx,
 770         .ndo_tx_timeout         = tlan_tx_timeout,
 771         .ndo_get_stats          = tlan_get_stats,
 772         .ndo_set_rx_mode        = tlan_set_multicast_list,
 773         .ndo_do_ioctl           = tlan_ioctl,
 774         .ndo_change_mtu         = eth_change_mtu,
 775         .ndo_set_mac_address    = eth_mac_addr,
 776         .ndo_validate_addr      = eth_validate_addr,
 777 #ifdef CONFIG_NET_POLL_CONTROLLER
 778         .ndo_poll_controller     = tlan_poll,
 779 #endif
 780 };
 781
 782 static void tlan_get_drvinfo(struct net_device *dev,
 783                              struct ethtool_drvinfo *info)
 784 {
 785         struct tlan_priv *priv = netdev_priv(dev);
 786
 787         strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
 788         if (priv->pci_dev)
 789                 strlcpy(info->bus_info, pci_name(priv->pci_dev),
 790                         sizeof(info->bus_info));
 791         else
 792                 strlcpy(info->bus_info, "EISA", sizeof(info->bus_info));
 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         netif_trans_update(dev); /* 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         if (priv->tlan_rev < 0x30) {
1654                 TLAN_DBG(TLAN_DEBUG_TX,
1655                          "TRANSMIT:  handling TX EOC (Head=%d Tail=%d) -- IRQ\n",
1656                          priv->tx_head, priv->tx_tail);
1657                 head_list = priv->tx_list + priv->tx_head;
1658                 head_list_phys = priv->tx_list_dma
1659                         + sizeof(struct tlan_list)*priv->tx_head;
1660                 if ((head_list->c_stat & TLAN_CSTAT_READY)
1661                     == TLAN_CSTAT_READY) {
1662                         netif_stop_queue(dev);
1663                         outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1664                         ack |= TLAN_HC_GO;
1665                 } else {
1666                         priv->tx_in_progress = 0;
1667                 }
1668         }
1669
1670         return ack;
1671
1672 }
1673
1674
1675
1676
1677 /***************************************************************
1678  *      tlan_handle_status_check
1679  *
1680  *      Returns:
1681  *              0 if Adapter check, 1 if Network Status check.
1682  *      Parms:
1683  *              dev             Device assigned the IRQ that was
1684  *                              raised.
1685  *              host_int        The contents of the HOST_INT
1686  *                              port.
1687  *
1688  *      This function handles Adapter Check/Network Status
1689  *      interrupts generated by the adapter.  It checks the
1690  *      vector in the HOST_INT register to determine if it is
1691  *      an Adapter Check interrupt.  If so, it resets the
1692  *      adapter.  Otherwise it clears the status registers
1693  *      and services the PHY.
1694  *
1695  **************************************************************/
1696
1697 static u32 tlan_handle_status_check(struct net_device *dev, u16 host_int)
1698 {
1699         struct tlan_priv        *priv = netdev_priv(dev);
1700         u32             ack;
1701         u32             error;
1702         u8              net_sts;
1703         u32             phy;
1704         u16             tlphy_ctl;
1705         u16             tlphy_sts;
1706
1707         ack = 1;
1708         if (host_int & TLAN_HI_IV_MASK) {
1709                 netif_stop_queue(dev);
1710                 error = inl(dev->base_addr + TLAN_CH_PARM);
1711                 netdev_info(dev, "Adaptor Error = 0x%x\n", error);
1712                 tlan_read_and_clear_stats(dev, TLAN_RECORD);
1713                 outl(TLAN_HC_AD_RST, dev->base_addr + TLAN_HOST_CMD);
1714
1715                 schedule_work(&priv->tlan_tqueue);
1716
1717                 netif_wake_queue(dev);
1718                 ack = 0;
1719         } else {
1720                 TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Status Check\n", dev->name);
1721                 phy = priv->phy[priv->phy_num];
1722
1723                 net_sts = tlan_dio_read8(dev->base_addr, TLAN_NET_STS);
1724                 if (net_sts) {
1725                         tlan_dio_write8(dev->base_addr, TLAN_NET_STS, net_sts);
1726                         TLAN_DBG(TLAN_DEBUG_GNRL, "%s:    Net_Sts = %x\n",
1727                                  dev->name, (unsigned) net_sts);
1728                 }
1729                 if ((net_sts & TLAN_NET_STS_MIRQ) &&  (priv->phy_num == 0)) {
1730                         tlan_mii_read_reg(dev, phy, TLAN_TLPHY_STS, &tlphy_sts);
1731                         tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tlphy_ctl);
1732                         if (!(tlphy_sts & TLAN_TS_POLOK) &&
1733                             !(tlphy_ctl & TLAN_TC_SWAPOL)) {
1734                                 tlphy_ctl |= TLAN_TC_SWAPOL;
1735                                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL,
1736                                                    tlphy_ctl);
1737                         } else if ((tlphy_sts & TLAN_TS_POLOK) &&
1738                                    (tlphy_ctl & TLAN_TC_SWAPOL)) {
1739                                 tlphy_ctl &= ~TLAN_TC_SWAPOL;
1740                                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL,
1741                                                    tlphy_ctl);
1742                         }
1743
1744                         if (debug)
1745                                 tlan_phy_print(dev);
1746                 }
1747         }
1748
1749         return ack;
1750
1751 }
1752
1753
1754
1755
1756 /***************************************************************
1757  *      tlan_handle_rx_eoc
1758  *
1759  *      Returns:
1760  *              1
1761  *      Parms:
1762  *              dev             Device assigned the IRQ that was
1763  *                              raised.
1764  *              host_int        The contents of the HOST_INT
1765  *                              port.
1766  *
1767  *      This driver is structured to determine EOC occurrences by
1768  *      reading the CSTAT member of the list structure.  Rx EOC
1769  *      interrupts are disabled via the DIO INTDIS register.
1770  *      However, TLAN chips before revision 3.0 didn't have this
1771  *      CSTAT member or a INTDIS register, so if this chip is
1772  *      pre-3.0, process EOC interrupts normally.
1773  *
1774  **************************************************************/
1775
1776 static u32 tlan_handle_rx_eoc(struct net_device *dev, u16 host_int)
1777 {
1778         struct tlan_priv        *priv = netdev_priv(dev);
1779         dma_addr_t      head_list_phys;
1780         u32             ack = 1;
1781
1782         if (priv->tlan_rev < 0x30) {
1783                 TLAN_DBG(TLAN_DEBUG_RX,
1784                          "RECEIVE:  Handling RX EOC (head=%d tail=%d) -- IRQ\n",
1785                          priv->rx_head, priv->rx_tail);
1786                 head_list_phys = priv->rx_list_dma
1787                         + sizeof(struct tlan_list)*priv->rx_head;
1788                 outl(head_list_phys, dev->base_addr + TLAN_CH_PARM);
1789                 ack |= TLAN_HC_GO | TLAN_HC_RT;
1790                 priv->rx_eoc_count++;
1791         }
1792
1793         return ack;
1794
1795 }
1796
1797
1798
1799
1800 /*****************************************************************************
1801 ******************************************************************************
1802
1803 ThunderLAN driver timer function
1804
1805 ******************************************************************************
1806 *****************************************************************************/
1807
1808
1809 /***************************************************************
1810  *      tlan_timer
1811  *
1812  *      Returns:
1813  *              Nothing
1814  *      Parms:
1815  *              data    A value given to add timer when
1816  *                      add_timer was called.
1817  *
1818  *      This function handles timed functionality for the
1819  *      TLAN driver.  The two current timer uses are for
1820  *      delaying for autonegotionation and driving the ACT LED.
1821  *      -       Autonegotiation requires being allowed about
1822  *              2 1/2 seconds before attempting to transmit a
1823  *              packet.  It would be a very bad thing to hang
1824  *              the kernel this long, so the driver doesn't
1825  *              allow transmission 'til after this time, for
1826  *              certain PHYs.  It would be much nicer if all
1827  *              PHYs were interrupt-capable like the internal
1828  *              PHY.
1829  *      -       The ACT LED, which shows adapter activity, is
1830  *              driven by the driver, and so must be left on
1831  *              for a short period to power up the LED so it
1832  *              can be seen.  This delay can be changed by
1833  *              changing the TLAN_TIMER_ACT_DELAY in tlan.h,
1834  *              if desired.  100 ms  produces a slightly
1835  *              sluggish response.
1836  *
1837  **************************************************************/
1838
1839 static void tlan_timer(unsigned long data)
1840 {
1841         struct net_device       *dev = (struct net_device *) data;
1842         struct tlan_priv        *priv = netdev_priv(dev);
1843         u32             elapsed;
1844         unsigned long   flags = 0;
1845
1846         priv->timer.function = NULL;
1847
1848         switch (priv->timer_type) {
1849         case TLAN_TIMER_PHY_PDOWN:
1850                 tlan_phy_power_down(dev);
1851                 break;
1852         case TLAN_TIMER_PHY_PUP:
1853                 tlan_phy_power_up(dev);
1854                 break;
1855         case TLAN_TIMER_PHY_RESET:
1856                 tlan_phy_reset(dev);
1857                 break;
1858         case TLAN_TIMER_PHY_START_LINK:
1859                 tlan_phy_start_link(dev);
1860                 break;
1861         case TLAN_TIMER_PHY_FINISH_AN:
1862                 tlan_phy_finish_auto_neg(dev);
1863                 break;
1864         case TLAN_TIMER_FINISH_RESET:
1865                 tlan_finish_reset(dev);
1866                 break;
1867         case TLAN_TIMER_ACTIVITY:
1868                 spin_lock_irqsave(&priv->lock, flags);
1869                 if (priv->timer.function == NULL) {
1870                         elapsed = jiffies - priv->timer_set_at;
1871                         if (elapsed >= TLAN_TIMER_ACT_DELAY) {
1872                                 tlan_dio_write8(dev->base_addr,
1873                                                 TLAN_LED_REG, TLAN_LED_LINK);
1874                         } else  {
1875                                 priv->timer.function = tlan_timer;
1876                                 priv->timer.expires = priv->timer_set_at
1877                                         + TLAN_TIMER_ACT_DELAY;
1878                                 spin_unlock_irqrestore(&priv->lock, flags);
1879                                 add_timer(&priv->timer);
1880                                 break;
1881                         }
1882                 }
1883                 spin_unlock_irqrestore(&priv->lock, flags);
1884                 break;
1885         default:
1886                 break;
1887         }
1888
1889 }
1890
1891
1892 /*****************************************************************************
1893 ******************************************************************************
1894
1895 ThunderLAN driver adapter related routines
1896
1897 ******************************************************************************
1898 *****************************************************************************/
1899
1900
1901 /***************************************************************
1902  *      tlan_reset_lists
1903  *
1904  *      Returns:
1905  *              Nothing
1906  *      Parms:
1907  *              dev     The device structure with the list
1908  *                      stuctures to be reset.
1909  *
1910  *      This routine sets the variables associated with managing
1911  *      the TLAN lists to their initial values.
1912  *
1913  **************************************************************/
1914
1915 static void tlan_reset_lists(struct net_device *dev)
1916 {
1917         struct tlan_priv *priv = netdev_priv(dev);
1918         int             i;
1919         struct tlan_list        *list;
1920         dma_addr_t      list_phys;
1921         struct sk_buff  *skb;
1922
1923         priv->tx_head = 0;
1924         priv->tx_tail = 0;
1925         for (i = 0; i < TLAN_NUM_TX_LISTS; i++) {
1926                 list = priv->tx_list + i;
1927                 list->c_stat = TLAN_CSTAT_UNUSED;
1928                 list->buffer[0].address = 0;
1929                 list->buffer[2].count = 0;
1930                 list->buffer[2].address = 0;
1931                 list->buffer[8].address = 0;
1932                 list->buffer[9].address = 0;
1933         }
1934
1935         priv->rx_head = 0;
1936         priv->rx_tail = TLAN_NUM_RX_LISTS - 1;
1937         for (i = 0; i < TLAN_NUM_RX_LISTS; i++) {
1938                 list = priv->rx_list + i;
1939                 list_phys = priv->rx_list_dma + sizeof(struct tlan_list)*i;
1940                 list->c_stat = TLAN_CSTAT_READY;
1941                 list->frame_size = TLAN_MAX_FRAME_SIZE;
1942                 list->buffer[0].count = TLAN_MAX_FRAME_SIZE | TLAN_LAST_BUFFER;
1943                 skb = netdev_alloc_skb_ip_align(dev, TLAN_MAX_FRAME_SIZE + 5);
1944                 if (!skb)
1945                         break;
1946
1947                 list->buffer[0].address = pci_map_single(priv->pci_dev,
1948                                                          skb->data,
1949                                                          TLAN_MAX_FRAME_SIZE,
1950                                                          PCI_DMA_FROMDEVICE);
1951                 tlan_store_skb(list, skb);
1952                 list->buffer[1].count = 0;
1953                 list->buffer[1].address = 0;
1954                 list->forward = list_phys + sizeof(struct tlan_list);
1955         }
1956
1957         /* in case ran out of memory early, clear bits */
1958         while (i < TLAN_NUM_RX_LISTS) {
1959                 tlan_store_skb(priv->rx_list + i, NULL);
1960                 ++i;
1961         }
1962         list->forward = 0;
1963
1964 }
1965
1966
1967 static void tlan_free_lists(struct net_device *dev)
1968 {
1969         struct tlan_priv *priv = netdev_priv(dev);
1970         int             i;
1971         struct tlan_list        *list;
1972         struct sk_buff  *skb;
1973
1974         for (i = 0; i < TLAN_NUM_TX_LISTS; i++) {
1975                 list = priv->tx_list + i;
1976                 skb = tlan_get_skb(list);
1977                 if (skb) {
1978                         pci_unmap_single(
1979                                 priv->pci_dev,
1980                                 list->buffer[0].address,
1981                                 max(skb->len,
1982                                     (unsigned int)TLAN_MIN_FRAME_SIZE),
1983                                 PCI_DMA_TODEVICE);
1984                         dev_kfree_skb_any(skb);
1985                         list->buffer[8].address = 0;
1986                         list->buffer[9].address = 0;
1987                 }
1988         }
1989
1990         for (i = 0; i < TLAN_NUM_RX_LISTS; i++) {
1991                 list = priv->rx_list + i;
1992                 skb = tlan_get_skb(list);
1993                 if (skb) {
1994                         pci_unmap_single(priv->pci_dev,
1995                                          list->buffer[0].address,
1996                                          TLAN_MAX_FRAME_SIZE,
1997                                          PCI_DMA_FROMDEVICE);
1998                         dev_kfree_skb_any(skb);
1999                         list->buffer[8].address = 0;
2000                         list->buffer[9].address = 0;
2001                 }
2002         }
2003 }
2004
2005
2006
2007
2008 /***************************************************************
2009  *      tlan_print_dio
2010  *
2011  *      Returns:
2012  *              Nothing
2013  *      Parms:
2014  *              io_base         Base IO port of the device of
2015  *                              which to print DIO registers.
2016  *
2017  *      This function prints out all the internal (DIO)
2018  *      registers of a TLAN chip.
2019  *
2020  **************************************************************/
2021
2022 static void tlan_print_dio(u16 io_base)
2023 {
2024         u32 data0, data1;
2025         int     i;
2026
2027         pr_info("Contents of internal registers for io base 0x%04hx\n",
2028                 io_base);
2029         pr_info("Off.  +0        +4\n");
2030         for (i = 0; i < 0x4C; i += 8) {
2031                 data0 = tlan_dio_read32(io_base, i);
2032                 data1 = tlan_dio_read32(io_base, i + 0x4);
2033                 pr_info("0x%02x  0x%08x 0x%08x\n", i, data0, data1);
2034         }
2035
2036 }
2037
2038
2039
2040
2041 /***************************************************************
2042  *      TLan_PrintList
2043  *
2044  *      Returns:
2045  *              Nothing
2046  *      Parms:
2047  *              list    A pointer to the struct tlan_list structure to
2048  *                      be printed.
2049  *              type    A string to designate type of list,
2050  *                      "Rx" or "Tx".
2051  *              num     The index of the list.
2052  *
2053  *      This function prints out the contents of the list
2054  *      pointed to by the list parameter.
2055  *
2056  **************************************************************/
2057
2058 static void tlan_print_list(struct tlan_list *list, char *type, int num)
2059 {
2060         int i;
2061
2062         pr_info("%s List %d at %p\n", type, num, list);
2063         pr_info("   Forward    = 0x%08x\n",  list->forward);
2064         pr_info("   CSTAT      = 0x%04hx\n", list->c_stat);
2065         pr_info("   Frame Size = 0x%04hx\n", list->frame_size);
2066         /* for (i = 0; i < 10; i++) { */
2067         for (i = 0; i < 2; i++) {
2068                 pr_info("   Buffer[%d].count, addr = 0x%08x, 0x%08x\n",
2069                         i, list->buffer[i].count, list->buffer[i].address);
2070         }
2071
2072 }
2073
2074
2075
2076
2077 /***************************************************************
2078  *      tlan_read_and_clear_stats
2079  *
2080  *      Returns:
2081  *              Nothing
2082  *      Parms:
2083  *              dev     Pointer to device structure of adapter
2084  *                      to which to read stats.
2085  *              record  Flag indicating whether to add
2086  *
2087  *      This functions reads all the internal status registers
2088  *      of the TLAN chip, which clears them as a side effect.
2089  *      It then either adds the values to the device's status
2090  *      struct, or discards them, depending on whether record
2091  *      is TLAN_RECORD (!=0)  or TLAN_IGNORE (==0).
2092  *
2093  **************************************************************/
2094
2095 static void tlan_read_and_clear_stats(struct net_device *dev, int record)
2096 {
2097         u32             tx_good, tx_under;
2098         u32             rx_good, rx_over;
2099         u32             def_tx, crc, code;
2100         u32             multi_col, single_col;
2101         u32             excess_col, late_col, loss;
2102
2103         outw(TLAN_GOOD_TX_FRMS, dev->base_addr + TLAN_DIO_ADR);
2104         tx_good  = inb(dev->base_addr + TLAN_DIO_DATA);
2105         tx_good += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2106         tx_good += inb(dev->base_addr + TLAN_DIO_DATA + 2) << 16;
2107         tx_under = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2108
2109         outw(TLAN_GOOD_RX_FRMS, dev->base_addr + TLAN_DIO_ADR);
2110         rx_good  = inb(dev->base_addr + TLAN_DIO_DATA);
2111         rx_good += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2112         rx_good += inb(dev->base_addr + TLAN_DIO_DATA + 2) << 16;
2113         rx_over  = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2114
2115         outw(TLAN_DEFERRED_TX, dev->base_addr + TLAN_DIO_ADR);
2116         def_tx  = inb(dev->base_addr + TLAN_DIO_DATA);
2117         def_tx += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2118         crc     = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2119         code    = inb(dev->base_addr + TLAN_DIO_DATA + 3);
2120
2121         outw(TLAN_MULTICOL_FRMS, dev->base_addr + TLAN_DIO_ADR);
2122         multi_col   = inb(dev->base_addr + TLAN_DIO_DATA);
2123         multi_col  += inb(dev->base_addr + TLAN_DIO_DATA + 1) << 8;
2124         single_col  = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2125         single_col += inb(dev->base_addr + TLAN_DIO_DATA + 3) << 8;
2126
2127         outw(TLAN_EXCESSCOL_FRMS, dev->base_addr + TLAN_DIO_ADR);
2128         excess_col = inb(dev->base_addr + TLAN_DIO_DATA);
2129         late_col   = inb(dev->base_addr + TLAN_DIO_DATA + 1);
2130         loss       = inb(dev->base_addr + TLAN_DIO_DATA + 2);
2131
2132         if (record) {
2133                 dev->stats.rx_packets += rx_good;
2134                 dev->stats.rx_errors  += rx_over + crc + code;
2135                 dev->stats.tx_packets += tx_good;
2136                 dev->stats.tx_errors  += tx_under + loss;
2137                 dev->stats.collisions += multi_col
2138                         + single_col + excess_col + late_col;
2139
2140                 dev->stats.rx_over_errors    += rx_over;
2141                 dev->stats.rx_crc_errors     += crc;
2142                 dev->stats.rx_frame_errors   += code;
2143
2144                 dev->stats.tx_aborted_errors += tx_under;
2145                 dev->stats.tx_carrier_errors += loss;
2146         }
2147
2148 }
2149
2150
2151
2152
2153 /***************************************************************
2154  *      TLan_Reset
2155  *
2156  *      Returns:
2157  *              0
2158  *      Parms:
2159  *              dev     Pointer to device structure of adapter
2160  *                      to be reset.
2161  *
2162  *      This function resets the adapter and it's physical
2163  *      device.  See Chap. 3, pp. 9-10 of the "ThunderLAN
2164  *      Programmer's Guide" for details.  The routine tries to
2165  *      implement what is detailed there, though adjustments
2166  *      have been made.
2167  *
2168  **************************************************************/
2169
2170 static void
2171 tlan_reset_adapter(struct net_device *dev)
2172 {
2173         struct tlan_priv        *priv = netdev_priv(dev);
2174         int             i;
2175         u32             addr;
2176         u32             data;
2177         u8              data8;
2178
2179         priv->tlan_full_duplex = false;
2180         priv->phy_online = 0;
2181         netif_carrier_off(dev);
2182
2183 /*  1.  Assert reset bit. */
2184
2185         data = inl(dev->base_addr + TLAN_HOST_CMD);
2186         data |= TLAN_HC_AD_RST;
2187         outl(data, dev->base_addr + TLAN_HOST_CMD);
2188
2189         udelay(1000);
2190
2191 /*  2.  Turn off interrupts. (Probably isn't necessary) */
2192
2193         data = inl(dev->base_addr + TLAN_HOST_CMD);
2194         data |= TLAN_HC_INT_OFF;
2195         outl(data, dev->base_addr + TLAN_HOST_CMD);
2196
2197 /*  3.  Clear AREGs and HASHs. */
2198
2199         for (i = TLAN_AREG_0; i <= TLAN_HASH_2; i += 4)
2200                 tlan_dio_write32(dev->base_addr, (u16) i, 0);
2201
2202 /*  4.  Setup NetConfig register. */
2203
2204         data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN | TLAN_NET_CFG_PHY_EN;
2205         tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, (u16) data);
2206
2207 /*  5.  Load Ld_Tmr and Ld_Thr in HOST_CMD. */
2208
2209         outl(TLAN_HC_LD_TMR | 0x3f, dev->base_addr + TLAN_HOST_CMD);
2210         outl(TLAN_HC_LD_THR | 0x9, dev->base_addr + TLAN_HOST_CMD);
2211
2212 /*  6.  Unreset the MII by setting NMRST (in NetSio) to 1. */
2213
2214         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
2215         addr = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
2216         tlan_set_bit(TLAN_NET_SIO_NMRST, addr);
2217
2218 /*  7.  Setup the remaining registers. */
2219
2220         if (priv->tlan_rev >= 0x30) {
2221                 data8 = TLAN_ID_TX_EOC | TLAN_ID_RX_EOC;
2222                 tlan_dio_write8(dev->base_addr, TLAN_INT_DIS, data8);
2223         }
2224         tlan_phy_detect(dev);
2225         data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN;
2226
2227         if (priv->adapter->flags & TLAN_ADAPTER_BIT_RATE_PHY) {
2228                 data |= TLAN_NET_CFG_BIT;
2229                 if (priv->aui == 1) {
2230                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x0a);
2231                 } else if (priv->duplex == TLAN_DUPLEX_FULL) {
2232                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x00);
2233                         priv->tlan_full_duplex = true;
2234                 } else {
2235                         tlan_dio_write8(dev->base_addr, TLAN_ACOMMIT, 0x08);
2236                 }
2237         }
2238
2239         /* don't power down internal PHY if we're going to use it */
2240         if (priv->phy_num == 0 ||
2241            (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10))
2242                 data |= TLAN_NET_CFG_PHY_EN;
2243         tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, (u16) data);
2244
2245         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY)
2246                 tlan_finish_reset(dev);
2247         else
2248                 tlan_phy_power_down(dev);
2249
2250 }
2251
2252
2253
2254
2255 static void
2256 tlan_finish_reset(struct net_device *dev)
2257 {
2258         struct tlan_priv        *priv = netdev_priv(dev);
2259         u8              data;
2260         u32             phy;
2261         u8              sio;
2262         u16             status;
2263         u16             partner;
2264         u16             tlphy_ctl;
2265         u16             tlphy_par;
2266         u16             tlphy_id1, tlphy_id2;
2267         int             i;
2268
2269         phy = priv->phy[priv->phy_num];
2270
2271         data = TLAN_NET_CMD_NRESET | TLAN_NET_CMD_NWRAP;
2272         if (priv->tlan_full_duplex)
2273                 data |= TLAN_NET_CMD_DUPLEX;
2274         tlan_dio_write8(dev->base_addr, TLAN_NET_CMD, data);
2275         data = TLAN_NET_MASK_MASK4 | TLAN_NET_MASK_MASK5;
2276         if (priv->phy_num == 0)
2277                 data |= TLAN_NET_MASK_MASK7;
2278         tlan_dio_write8(dev->base_addr, TLAN_NET_MASK, data);
2279         tlan_dio_write16(dev->base_addr, TLAN_MAX_RX, ((1536)+7)&~7);
2280         tlan_mii_read_reg(dev, phy, MII_GEN_ID_HI, &tlphy_id1);
2281         tlan_mii_read_reg(dev, phy, MII_GEN_ID_LO, &tlphy_id2);
2282
2283         if ((priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) ||
2284             (priv->aui)) {
2285                 status = MII_GS_LINK;
2286                 netdev_info(dev, "Link forced\n");
2287         } else {
2288                 tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2289                 udelay(1000);
2290                 tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2291                 if (status & MII_GS_LINK) {
2292                         /* We only support link info on Nat.Sem. PHY's */
2293                         if ((tlphy_id1 == NAT_SEM_ID1) &&
2294                             (tlphy_id2 == NAT_SEM_ID2)) {
2295                                 tlan_mii_read_reg(dev, phy, MII_AN_LPA,
2296                                         &partner);
2297                                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_PAR,
2298                                         &tlphy_par);
2299
2300                                 netdev_info(dev,
2301                                         "Link active, %s %uMbps %s-Duplex\n",
2302                                         !(tlphy_par & TLAN_PHY_AN_EN_STAT)
2303                                         ? "forced" : "Autonegotiation enabled,",
2304                                         tlphy_par & TLAN_PHY_SPEED_100
2305                                         ? 100 : 10,
2306                                         tlphy_par & TLAN_PHY_DUPLEX_FULL
2307                                         ? "Full" : "Half");
2308
2309                                 if (tlphy_par & TLAN_PHY_AN_EN_STAT) {
2310                                         netdev_info(dev, "Partner capability:");
2311                                         for (i = 5; i < 10; i++)
2312                                                 if (partner & (1 << i))
2313                                                         pr_cont(" %s",
2314                                                                 media[i-5]);
2315                                         pr_cont("\n");
2316                                 }
2317                         } else
2318                                 netdev_info(dev, "Link active\n");
2319                         /* Enabling link beat monitoring */
2320                         priv->media_timer.function = tlan_phy_monitor;
2321                         priv->media_timer.data = (unsigned long) dev;
2322                         priv->media_timer.expires = jiffies + HZ;
2323                         add_timer(&priv->media_timer);
2324                 }
2325         }
2326
2327         if (priv->phy_num == 0) {
2328                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tlphy_ctl);
2329                 tlphy_ctl |= TLAN_TC_INTEN;
2330                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL, tlphy_ctl);
2331                 sio = tlan_dio_read8(dev->base_addr, TLAN_NET_SIO);
2332                 sio |= TLAN_NET_SIO_MINTEN;
2333                 tlan_dio_write8(dev->base_addr, TLAN_NET_SIO, sio);
2334         }
2335
2336         if (status & MII_GS_LINK) {
2337                 tlan_set_mac(dev, 0, dev->dev_addr);
2338                 priv->phy_online = 1;
2339                 outb((TLAN_HC_INT_ON >> 8), dev->base_addr + TLAN_HOST_CMD + 1);
2340                 if (debug >= 1 && debug != TLAN_DEBUG_PROBE)
2341                         outb((TLAN_HC_REQ_INT >> 8),
2342                              dev->base_addr + TLAN_HOST_CMD + 1);
2343                 outl(priv->rx_list_dma, dev->base_addr + TLAN_CH_PARM);
2344                 outl(TLAN_HC_GO | TLAN_HC_RT, dev->base_addr + TLAN_HOST_CMD);
2345                 tlan_dio_write8(dev->base_addr, TLAN_LED_REG, TLAN_LED_LINK);
2346                 netif_carrier_on(dev);
2347         } else {
2348                 netdev_info(dev, "Link inactive, will retry in 10 secs...\n");
2349                 tlan_set_timer(dev, (10*HZ), TLAN_TIMER_FINISH_RESET);
2350                 return;
2351         }
2352         tlan_set_multicast_list(dev);
2353
2354 }
2355
2356
2357
2358
2359 /***************************************************************
2360  *      tlan_set_mac
2361  *
2362  *      Returns:
2363  *              Nothing
2364  *      Parms:
2365  *              dev     Pointer to device structure of adapter
2366  *                      on which to change the AREG.
2367  *              areg    The AREG to set the address in (0 - 3).
2368  *              mac     A pointer to an array of chars.  Each
2369  *                      element stores one byte of the address.
2370  *                      IE, it isn't in ascii.
2371  *
2372  *      This function transfers a MAC address to one of the
2373  *      TLAN AREGs (address registers).  The TLAN chip locks
2374  *      the register on writing to offset 0 and unlocks the
2375  *      register after writing to offset 5.  If NULL is passed
2376  *      in mac, then the AREG is filled with 0's.
2377  *
2378  **************************************************************/
2379
2380 static void tlan_set_mac(struct net_device *dev, int areg, char *mac)
2381 {
2382         int i;
2383
2384         areg *= 6;
2385
2386         if (mac != NULL) {
2387                 for (i = 0; i < 6; i++)
2388                         tlan_dio_write8(dev->base_addr,
2389                                         TLAN_AREG_0 + areg + i, mac[i]);
2390         } else {
2391                 for (i = 0; i < 6; i++)
2392                         tlan_dio_write8(dev->base_addr,
2393                                         TLAN_AREG_0 + areg + i, 0);
2394         }
2395
2396 }
2397
2398
2399
2400
2401 /*****************************************************************************
2402 ******************************************************************************
2403
2404 ThunderLAN driver PHY layer routines
2405
2406 ******************************************************************************
2407 *****************************************************************************/
2408
2409
2410
2411 /*********************************************************************
2412  *      tlan_phy_print
2413  *
2414  *      Returns:
2415  *              Nothing
2416  *      Parms:
2417  *              dev     A pointer to the device structure of the
2418  *                      TLAN device having the PHYs to be detailed.
2419  *
2420  *      This function prints the registers a PHY (aka transceiver).
2421  *
2422  ********************************************************************/
2423
2424 static void tlan_phy_print(struct net_device *dev)
2425 {
2426         struct tlan_priv *priv = netdev_priv(dev);
2427         u16 i, data0, data1, data2, data3, phy;
2428
2429         phy = priv->phy[priv->phy_num];
2430
2431         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) {
2432                 netdev_info(dev, "Unmanaged PHY\n");
2433         } else if (phy <= TLAN_PHY_MAX_ADDR) {
2434                 netdev_info(dev, "PHY 0x%02x\n", phy);
2435                 pr_info("   Off.  +0     +1     +2     +3\n");
2436                 for (i = 0; i < 0x20; i += 4) {
2437                         tlan_mii_read_reg(dev, phy, i, &data0);
2438                         tlan_mii_read_reg(dev, phy, i + 1, &data1);
2439                         tlan_mii_read_reg(dev, phy, i + 2, &data2);
2440                         tlan_mii_read_reg(dev, phy, i + 3, &data3);
2441                         pr_info("   0x%02x 0x%04hx 0x%04hx 0x%04hx 0x%04hx\n",
2442                                 i, data0, data1, data2, data3);
2443                 }
2444         } else {
2445                 netdev_info(dev, "Invalid PHY\n");
2446         }
2447
2448 }
2449
2450
2451
2452
2453 /*********************************************************************
2454  *      tlan_phy_detect
2455  *
2456  *      Returns:
2457  *              Nothing
2458  *      Parms:
2459  *              dev     A pointer to the device structure of the adapter
2460  *                      for which the PHY needs determined.
2461  *
2462  *      So far I've found that adapters which have external PHYs
2463  *      may also use the internal PHY for part of the functionality.
2464  *      (eg, AUI/Thinnet).  This function finds out if this TLAN
2465  *      chip has an internal PHY, and then finds the first external
2466  *      PHY (starting from address 0) if it exists).
2467  *
2468  ********************************************************************/
2469
2470 static void tlan_phy_detect(struct net_device *dev)
2471 {
2472         struct tlan_priv *priv = netdev_priv(dev);
2473         u16             control;
2474         u16             hi;
2475         u16             lo;
2476         u32             phy;
2477
2478         if (priv->adapter->flags & TLAN_ADAPTER_UNMANAGED_PHY) {
2479                 priv->phy_num = 0xffff;
2480                 return;
2481         }
2482
2483         tlan_mii_read_reg(dev, TLAN_PHY_MAX_ADDR, MII_GEN_ID_HI, &hi);
2484
2485         if (hi != 0xffff)
2486                 priv->phy[0] = TLAN_PHY_MAX_ADDR;
2487         else
2488                 priv->phy[0] = TLAN_PHY_NONE;
2489
2490         priv->phy[1] = TLAN_PHY_NONE;
2491         for (phy = 0; phy <= TLAN_PHY_MAX_ADDR; phy++) {
2492                 tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &control);
2493                 tlan_mii_read_reg(dev, phy, MII_GEN_ID_HI, &hi);
2494                 tlan_mii_read_reg(dev, phy, MII_GEN_ID_LO, &lo);
2495                 if ((control != 0xffff) ||
2496                     (hi != 0xffff) || (lo != 0xffff)) {
2497                         TLAN_DBG(TLAN_DEBUG_GNRL,
2498                                  "PHY found at %02x %04x %04x %04x\n",
2499                                  phy, control, hi, lo);
2500                         if ((priv->phy[1] == TLAN_PHY_NONE) &&
2501                             (phy != TLAN_PHY_MAX_ADDR)) {
2502                                 priv->phy[1] = phy;
2503                         }
2504                 }
2505         }
2506
2507         if (priv->phy[1] != TLAN_PHY_NONE)
2508                 priv->phy_num = 1;
2509         else if (priv->phy[0] != TLAN_PHY_NONE)
2510                 priv->phy_num = 0;
2511         else
2512                 netdev_info(dev, "Cannot initialize device, no PHY was found!\n");
2513
2514 }
2515
2516
2517
2518
2519 static void tlan_phy_power_down(struct net_device *dev)
2520 {
2521         struct tlan_priv        *priv = netdev_priv(dev);
2522         u16             value;
2523
2524         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Powering down PHY(s).\n", dev->name);
2525         value = MII_GC_PDOWN | MII_GC_LOOPBK | MII_GC_ISOLATE;
2526         tlan_mii_sync(dev->base_addr);
2527         tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value);
2528         if ((priv->phy_num == 0) && (priv->phy[1] != TLAN_PHY_NONE)) {
2529                 /* if using internal PHY, the external PHY must be powered on */
2530                 if (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10)
2531                         value = MII_GC_ISOLATE; /* just isolate it from MII */
2532                 tlan_mii_sync(dev->base_addr);
2533                 tlan_mii_write_reg(dev, priv->phy[1], MII_GEN_CTL, value);
2534         }
2535
2536         /* Wait for 50 ms and powerup
2537          * This is abitrary.  It is intended to make sure the
2538          * transceiver settles.
2539          */
2540         tlan_set_timer(dev, msecs_to_jiffies(50), TLAN_TIMER_PHY_PUP);
2541
2542 }
2543
2544
2545
2546
2547 static void tlan_phy_power_up(struct net_device *dev)
2548 {
2549         struct tlan_priv        *priv = netdev_priv(dev);
2550         u16             value;
2551
2552         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Powering up PHY.\n", dev->name);
2553         tlan_mii_sync(dev->base_addr);
2554         value = MII_GC_LOOPBK;
2555         tlan_mii_write_reg(dev, priv->phy[priv->phy_num], MII_GEN_CTL, value);
2556         tlan_mii_sync(dev->base_addr);
2557         /* Wait for 500 ms and reset the
2558          * transceiver.  The TLAN docs say both 50 ms and
2559          * 500 ms, so do the longer, just in case.
2560          */
2561         tlan_set_timer(dev, msecs_to_jiffies(500), TLAN_TIMER_PHY_RESET);
2562
2563 }
2564
2565
2566
2567
2568 static void tlan_phy_reset(struct net_device *dev)
2569 {
2570         struct tlan_priv        *priv = netdev_priv(dev);
2571         u16             phy;
2572         u16             value;
2573         unsigned long timeout = jiffies + HZ;
2574
2575         phy = priv->phy[priv->phy_num];
2576
2577         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Resetting PHY.\n", dev->name);
2578         tlan_mii_sync(dev->base_addr);
2579         value = MII_GC_LOOPBK | MII_GC_RESET;
2580         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, value);
2581         do {
2582                 tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value);
2583                 if (time_after(jiffies, timeout)) {
2584                         netdev_err(dev, "PHY reset timeout\n");
2585                         return;
2586                 }
2587         } while (value & MII_GC_RESET);
2588
2589         /* Wait for 500 ms and initialize.
2590          * I don't remember why I wait this long.
2591          * I've changed this to 50ms, as it seems long enough.
2592          */
2593         tlan_set_timer(dev, msecs_to_jiffies(50), TLAN_TIMER_PHY_START_LINK);
2594
2595 }
2596
2597
2598
2599
2600 static void tlan_phy_start_link(struct net_device *dev)
2601 {
2602         struct tlan_priv        *priv = netdev_priv(dev);
2603         u16             ability;
2604         u16             control;
2605         u16             data;
2606         u16             phy;
2607         u16             status;
2608         u16             tctl;
2609
2610         phy = priv->phy[priv->phy_num];
2611         TLAN_DBG(TLAN_DEBUG_GNRL, "%s: Trying to activate link.\n", dev->name);
2612         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2613         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &ability);
2614
2615         if ((status & MII_GS_AUTONEG) &&
2616             (!priv->aui)) {
2617                 ability = status >> 11;
2618                 if (priv->speed  == TLAN_SPEED_10 &&
2619                     priv->duplex == TLAN_DUPLEX_HALF) {
2620                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x0000);
2621                 } else if (priv->speed == TLAN_SPEED_10 &&
2622                            priv->duplex == TLAN_DUPLEX_FULL) {
2623                         priv->tlan_full_duplex = true;
2624                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x0100);
2625                 } else if (priv->speed == TLAN_SPEED_100 &&
2626                            priv->duplex == TLAN_DUPLEX_HALF) {
2627                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x2000);
2628                 } else if (priv->speed == TLAN_SPEED_100 &&
2629                            priv->duplex == TLAN_DUPLEX_FULL) {
2630                         priv->tlan_full_duplex = true;
2631                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x2100);
2632                 } else {
2633
2634                         /* Set Auto-Neg advertisement */
2635                         tlan_mii_write_reg(dev, phy, MII_AN_ADV,
2636                                            (ability << 5) | 1);
2637                         /* Enablee Auto-Neg */
2638                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x1000);
2639                         /* Restart Auto-Neg */
2640                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL, 0x1200);
2641                         /* Wait for 4 sec for autonegotiation
2642                          * to complete.  The max spec time is less than this
2643                          * but the card need additional time to start AN.
2644                          * .5 sec should be plenty extra.
2645                          */
2646                         netdev_info(dev, "Starting autonegotiation\n");
2647                         tlan_set_timer(dev, (2*HZ), TLAN_TIMER_PHY_FINISH_AN);
2648                         return;
2649                 }
2650
2651         }
2652
2653         if ((priv->aui) && (priv->phy_num != 0)) {
2654                 priv->phy_num = 0;
2655                 data = TLAN_NET_CFG_1FRAG | TLAN_NET_CFG_1CHAN
2656                         | TLAN_NET_CFG_PHY_EN;
2657                 tlan_dio_write16(dev->base_addr, TLAN_NET_CONFIG, data);
2658                 tlan_set_timer(dev, msecs_to_jiffies(40), TLAN_TIMER_PHY_PDOWN);
2659                 return;
2660         } else if (priv->phy_num == 0) {
2661                 control = 0;
2662                 tlan_mii_read_reg(dev, phy, TLAN_TLPHY_CTL, &tctl);
2663                 if (priv->aui) {
2664                         tctl |= TLAN_TC_AUISEL;
2665                 } else {
2666                         tctl &= ~TLAN_TC_AUISEL;
2667                         if (priv->duplex == TLAN_DUPLEX_FULL) {
2668                                 control |= MII_GC_DUPLEX;
2669                                 priv->tlan_full_duplex = true;
2670                         }
2671                         if (priv->speed == TLAN_SPEED_100)
2672                                 control |= MII_GC_SPEEDSEL;
2673                 }
2674                 tlan_mii_write_reg(dev, phy, MII_GEN_CTL, control);
2675                 tlan_mii_write_reg(dev, phy, TLAN_TLPHY_CTL, tctl);
2676         }
2677
2678         /* Wait for 2 sec to give the transceiver time
2679          * to establish link.
2680          */
2681         tlan_set_timer(dev, (4*HZ), TLAN_TIMER_FINISH_RESET);
2682
2683 }
2684
2685
2686
2687
2688 static void tlan_phy_finish_auto_neg(struct net_device *dev)
2689 {
2690         struct tlan_priv        *priv = netdev_priv(dev);
2691         u16             an_adv;
2692         u16             an_lpa;
2693         u16             mode;
2694         u16             phy;
2695         u16             status;
2696
2697         phy = priv->phy[priv->phy_num];
2698
2699         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2700         udelay(1000);
2701         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &status);
2702
2703         if (!(status & MII_GS_AUTOCMPLT)) {
2704                 /* Wait for 8 sec to give the process
2705                  * more time.  Perhaps we should fail after a while.
2706                  */
2707                 tlan_set_timer(dev, 2 * HZ, TLAN_TIMER_PHY_FINISH_AN);
2708                 return;
2709         }
2710
2711         netdev_info(dev, "Autonegotiation complete\n");
2712         tlan_mii_read_reg(dev, phy, MII_AN_ADV, &an_adv);
2713         tlan_mii_read_reg(dev, phy, MII_AN_LPA, &an_lpa);
2714         mode = an_adv & an_lpa & 0x03E0;
2715         if (mode & 0x0100)
2716                 priv->tlan_full_duplex = true;
2717         else if (!(mode & 0x0080) && (mode & 0x0040))
2718                 priv->tlan_full_duplex = true;
2719
2720         /* switch to internal PHY for 10 Mbps */
2721         if ((!(mode & 0x0180)) &&
2722             (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) &&
2723             (priv->phy_num != 0)) {
2724                 priv->phy_num = 0;
2725                 tlan_set_timer(dev, msecs_to_jiffies(400), TLAN_TIMER_PHY_PDOWN);
2726                 return;
2727         }
2728
2729         if (priv->phy_num == 0) {
2730                 if ((priv->duplex == TLAN_DUPLEX_FULL) ||
2731                     (an_adv & an_lpa & 0x0040)) {
2732                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL,
2733                                            MII_GC_AUTOENB | MII_GC_DUPLEX);
2734                         netdev_info(dev, "Starting internal PHY with FULL-DUPLEX\n");
2735                 } else {
2736                         tlan_mii_write_reg(dev, phy, MII_GEN_CTL,
2737                                            MII_GC_AUTOENB);
2738                         netdev_info(dev, "Starting internal PHY with HALF-DUPLEX\n");
2739                 }
2740         }
2741
2742         /* Wait for 100 ms.  No reason in partiticular.
2743          */
2744         tlan_set_timer(dev, msecs_to_jiffies(100), TLAN_TIMER_FINISH_RESET);
2745
2746 }
2747
2748
2749 /*********************************************************************
2750  *
2751  *     tlan_phy_monitor
2752  *
2753  *     Returns:
2754  *            None
2755  *
2756  *     Params:
2757  *            data           The device structure of this device.
2758  *
2759  *
2760  *     This function monitors PHY condition by reading the status
2761  *     register via the MII bus, controls LINK LED and notifies the
2762  *     kernel about link state.
2763  *
2764  *******************************************************************/
2765
2766 static void tlan_phy_monitor(unsigned long data)
2767 {
2768         struct net_device *dev = (struct net_device *) data;
2769         struct tlan_priv *priv = netdev_priv(dev);
2770         u16     phy;
2771         u16     phy_status;
2772
2773         phy = priv->phy[priv->phy_num];
2774
2775         /* Get PHY status register */
2776         tlan_mii_read_reg(dev, phy, MII_GEN_STS, &phy_status);
2777
2778         /* Check if link has been lost */
2779         if (!(phy_status & MII_GS_LINK)) {
2780                 if (netif_carrier_ok(dev)) {
2781                         printk(KERN_DEBUG "TLAN: %s has lost link\n",
2782                                dev->name);
2783                         tlan_dio_write8(dev->base_addr, TLAN_LED_REG, 0);
2784                         netif_carrier_off(dev);
2785                         if (priv->adapter->flags & TLAN_ADAPTER_USE_INTERN_10) {
2786                                 /* power down internal PHY */
2787                                 u16 data = MII_GC_PDOWN | MII_GC_LOOPBK |
2788                                            MII_GC_ISOLATE;
2789
2790                                 tlan_mii_sync(dev->base_addr);
2791                                 tlan_mii_write_reg(dev, priv->phy[0],
2792                                                    MII_GEN_CTL, data);
2793                                 /* set to external PHY */
2794                                 priv->phy_num = 1;
2795                                 /* restart autonegotiation */
2796                                 tlan_set_timer(dev, msecs_to_jiffies(400),
2797                                                TLAN_TIMER_PHY_PDOWN);
2798                                 return;
2799                         }
2800                 }
2801         }
2802
2803         /* Link restablished? */
2804         if ((phy_status & MII_GS_LINK) && !netif_carrier_ok(dev)) {
2805                 tlan_dio_write8(dev->base_addr, TLAN_LED_REG, TLAN_LED_LINK);
2806                 printk(KERN_DEBUG "TLAN: %s has reestablished link\n",
2807                        dev->name);
2808                 netif_carrier_on(dev);
2809         }
2810         priv->media_timer.expires = jiffies + HZ;
2811         add_timer(&priv->media_timer);
2812 }
2813
2814
2815 /*****************************************************************************
2816 ******************************************************************************
2817
2818 ThunderLAN driver MII routines
2819
2820 these routines are based on the information in chap. 2 of the
2821 "ThunderLAN Programmer's Guide", pp. 15-24.
2822
2823 ******************************************************************************
2824 *****************************************************************************/
2825
2826
2827 /***************************************************************
2828  *      tlan_mii_read_reg
2829  *
2830  *      Returns:
2831  *              false   if ack received ok
2832  *              true    if no ack received or other error
2833  *
2834  *      Parms:
2835  *              dev             The device structure containing
2836  *                              The io address and interrupt count
2837  *                              for this device.
2838  *              phy             The address of the PHY to be queried.
2839  *              reg             The register whose contents are to be
2840  *                              retrieved.
2841  *              val             A pointer to a variable to store the
2842  *                              retrieved value.
2843  *
2844  *      This function uses the TLAN's MII bus to retrieve the contents
2845  *      of a given register on a PHY.  It sends the appropriate info
2846  *      and then reads the 16-bit register value from the MII bus via
2847  *      the TLAN SIO register.
2848  *
2849  **************************************************************/
2850
2851 static bool
2852 tlan_mii_read_reg(struct net_device *dev, u16 phy, u16 reg, u16 *val)
2853 {
2854         u8      nack;
2855         u16     sio, tmp;
2856         u32     i;
2857         bool    err;
2858         int     minten;
2859         struct tlan_priv *priv = netdev_priv(dev);
2860         unsigned long flags = 0;
2861
2862         err = false;
2863         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
2864         sio = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
2865
2866         if (!in_irq())
2867                 spin_lock_irqsave(&priv->lock, flags);
2868
2869         tlan_mii_sync(dev->base_addr);
2870
2871         minten = tlan_get_bit(TLAN_NET_SIO_MINTEN, sio);
2872         if (minten)
2873                 tlan_clear_bit(TLAN_NET_SIO_MINTEN, sio);
2874
2875         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* start (01b) */
2876         tlan_mii_send_data(dev->base_addr, 0x2, 2);     /* read  (10b) */
2877         tlan_mii_send_data(dev->base_addr, phy, 5);     /* device #      */
2878         tlan_mii_send_data(dev->base_addr, reg, 5);     /* register #    */
2879
2880
2881         tlan_clear_bit(TLAN_NET_SIO_MTXEN, sio);        /* change direction */
2882
2883         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* clock idle bit */
2884         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2885         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* wait 300ns */
2886
2887         nack = tlan_get_bit(TLAN_NET_SIO_MDATA, sio);   /* check for ACK */
2888         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);           /* finish ACK */
2889         if (nack) {                                     /* no ACK, so fake it */
2890                 for (i = 0; i < 16; i++) {
2891                         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2892                         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2893                 }
2894                 tmp = 0xffff;
2895                 err = true;
2896         } else {                                        /* ACK, so read data */
2897                 for (tmp = 0, i = 0x8000; i; i >>= 1) {
2898                         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2899                         if (tlan_get_bit(TLAN_NET_SIO_MDATA, sio))
2900                                 tmp |= i;
2901                         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2902                 }
2903         }
2904
2905
2906         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);         /* idle cycle */
2907         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2908
2909         if (minten)
2910                 tlan_set_bit(TLAN_NET_SIO_MINTEN, sio);
2911
2912         *val = tmp;
2913
2914         if (!in_irq())
2915                 spin_unlock_irqrestore(&priv->lock, flags);
2916
2917         return err;
2918
2919 }
2920
2921
2922
2923
2924 /***************************************************************
2925  *      tlan_mii_send_data
2926  *
2927  *      Returns:
2928  *              Nothing
2929  *      Parms:
2930  *              base_port       The base IO port of the adapter in
2931  *                              question.
2932  *              dev             The address of the PHY to be queried.
2933  *              data            The value to be placed on the MII bus.
2934  *              num_bits        The number of bits in data that are to
2935  *                              be placed on the MII bus.
2936  *
2937  *      This function sends on sequence of bits on the MII
2938  *      configuration bus.
2939  *
2940  **************************************************************/
2941
2942 static void tlan_mii_send_data(u16 base_port, u32 data, unsigned num_bits)
2943 {
2944         u16 sio;
2945         u32 i;
2946
2947         if (num_bits == 0)
2948                 return;
2949
2950         outw(TLAN_NET_SIO, base_port + TLAN_DIO_ADR);
2951         sio = base_port + TLAN_DIO_DATA + TLAN_NET_SIO;
2952         tlan_set_bit(TLAN_NET_SIO_MTXEN, sio);
2953
2954         for (i = (0x1 << (num_bits - 1)); i; i >>= 1) {
2955                 tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2956                 (void) tlan_get_bit(TLAN_NET_SIO_MCLK, sio);
2957                 if (data & i)
2958                         tlan_set_bit(TLAN_NET_SIO_MDATA, sio);
2959                 else
2960                         tlan_clear_bit(TLAN_NET_SIO_MDATA, sio);
2961                 tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2962                 (void) tlan_get_bit(TLAN_NET_SIO_MCLK, sio);
2963         }
2964
2965 }
2966
2967
2968
2969
2970 /***************************************************************
2971  *      TLan_MiiSync
2972  *
2973  *      Returns:
2974  *              Nothing
2975  *      Parms:
2976  *              base_port       The base IO port of the adapter in
2977  *                              question.
2978  *
2979  *      This functions syncs all PHYs in terms of the MII configuration
2980  *      bus.
2981  *
2982  **************************************************************/
2983
2984 static void tlan_mii_sync(u16 base_port)
2985 {
2986         int i;
2987         u16 sio;
2988
2989         outw(TLAN_NET_SIO, base_port + TLAN_DIO_ADR);
2990         sio = base_port + TLAN_DIO_DATA + TLAN_NET_SIO;
2991
2992         tlan_clear_bit(TLAN_NET_SIO_MTXEN, sio);
2993         for (i = 0; i < 32; i++) {
2994                 tlan_clear_bit(TLAN_NET_SIO_MCLK, sio);
2995                 tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
2996         }
2997
2998 }
2999
3000
3001
3002
3003 /***************************************************************
3004  *      tlan_mii_write_reg
3005  *
3006  *      Returns:
3007  *              Nothing
3008  *      Parms:
3009  *              dev             The device structure for the device
3010  *                              to write to.
3011  *              phy             The address of the PHY to be written to.
3012  *              reg             The register whose contents are to be
3013  *                              written.
3014  *              val             The value to be written to the register.
3015  *
3016  *      This function uses the TLAN's MII bus to write the contents of a
3017  *      given register on a PHY.  It sends the appropriate info and then
3018  *      writes the 16-bit register value from the MII configuration bus
3019  *      via the TLAN SIO register.
3020  *
3021  **************************************************************/
3022
3023 static void
3024 tlan_mii_write_reg(struct net_device *dev, u16 phy, u16 reg, u16 val)
3025 {
3026         u16     sio;
3027         int     minten;
3028         unsigned long flags = 0;
3029         struct tlan_priv *priv = netdev_priv(dev);
3030
3031         outw(TLAN_NET_SIO, dev->base_addr + TLAN_DIO_ADR);
3032         sio = dev->base_addr + TLAN_DIO_DATA + TLAN_NET_SIO;
3033
3034         if (!in_irq())
3035                 spin_lock_irqsave(&priv->lock, flags);
3036
3037         tlan_mii_sync(dev->base_addr);
3038
3039         minten = tlan_get_bit(TLAN_NET_SIO_MINTEN, sio);
3040         if (minten)
3041                 tlan_clear_bit(TLAN_NET_SIO_MINTEN, sio);
3042
3043         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* start (01b) */
3044         tlan_mii_send_data(dev->base_addr, 0x1, 2);     /* write (01b) */
3045         tlan_mii_send_data(dev->base_addr, phy, 5);     /* device #      */
3046         tlan_mii_send_data(dev->base_addr, reg, 5);     /* register #    */
3047
3048         tlan_mii_send_data(dev->base_addr, 0x2, 2);     /* send ACK */
3049         tlan_mii_send_data(dev->base_addr, val, 16);    /* send data */
3050
3051         tlan_clear_bit(TLAN_NET_SIO_MCLK, sio); /* idle cycle */
3052         tlan_set_bit(TLAN_NET_SIO_MCLK, sio);
3053
3054         if (minten)
3055                 tlan_set_bit(TLAN_NET_SIO_MINTEN, sio);
3056
3057         if (!in_irq())
3058                 spin_unlock_irqrestore(&priv->lock, flags);
3059
3060 }
3061
3062
3063
3064
3065 /*****************************************************************************
3066 ******************************************************************************
3067
3068 ThunderLAN driver eeprom routines
3069
3070 the Compaq netelligent 10 and 10/100 cards use a microchip 24C02A
3071 EEPROM.  these functions are based on information in microchip's
3072 data sheet.  I don't know how well this functions will work with
3073 other Eeproms.
3074
3075 ******************************************************************************
3076 *****************************************************************************/
3077
3078
3079 /***************************************************************
3080  *      tlan_ee_send_start
3081  *
3082  *      Returns:
3083  *              Nothing
3084  *      Parms:
3085  *              io_base         The IO port base address for the
3086  *                              TLAN device with the EEPROM to
3087  *                              use.
3088  *
3089  *      This function sends a start cycle to an EEPROM attached
3090  *      to a TLAN chip.
3091  *
3092  **************************************************************/
3093
3094 static void tlan_ee_send_start(u16 io_base)
3095 {
3096         u16     sio;
3097
3098         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3099         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3100
3101         tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3102         tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3103         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3104         tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3105         tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3106
3107 }
3108
3109
3110
3111
3112 /***************************************************************
3113  *      tlan_ee_send_byte
3114  *
3115  *      Returns:
3116  *              If the correct ack was received, 0, otherwise 1
3117  *      Parms:  io_base         The IO port base address for the
3118  *                              TLAN device with the EEPROM to
3119  *                              use.
3120  *              data            The 8 bits of information to
3121  *                              send to the EEPROM.
3122  *              stop            If TLAN_EEPROM_STOP is passed, a
3123  *                              stop cycle is sent after the
3124  *                              byte is sent after the ack is
3125  *                              read.
3126  *
3127  *      This function sends a byte on the serial EEPROM line,
3128  *      driving the clock to send each bit. The function then
3129  *      reverses transmission direction and reads an acknowledge
3130  *      bit.
3131  *
3132  **************************************************************/
3133
3134 static int tlan_ee_send_byte(u16 io_base, u8 data, int stop)
3135 {
3136         int     err;
3137         u8      place;
3138         u16     sio;
3139
3140         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3141         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3142
3143         /* Assume clock is low, tx is enabled; */
3144         for (place = 0x80; place != 0; place >>= 1) {
3145                 if (place & data)
3146                         tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3147                 else
3148                         tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3149                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3150                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3151         }
3152         tlan_clear_bit(TLAN_NET_SIO_ETXEN, sio);
3153         tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3154         err = tlan_get_bit(TLAN_NET_SIO_EDATA, sio);
3155         tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3156         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3157
3158         if ((!err) && stop) {
3159                 /* STOP, raise data while clock is high */
3160                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3161                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3162                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3163         }
3164
3165         return err;
3166
3167 }
3168
3169
3170
3171
3172 /***************************************************************
3173  *      tlan_ee_receive_byte
3174  *
3175  *      Returns:
3176  *              Nothing
3177  *      Parms:
3178  *              io_base         The IO port base address for the
3179  *                              TLAN device with the EEPROM to
3180  *                              use.
3181  *              data            An address to a char to hold the
3182  *                              data sent from the EEPROM.
3183  *              stop            If TLAN_EEPROM_STOP is passed, a
3184  *                              stop cycle is sent after the
3185  *                              byte is received, and no ack is
3186  *                              sent.
3187  *
3188  *      This function receives 8 bits of data from the EEPROM
3189  *      over the serial link.  It then sends and ack bit, or no
3190  *      ack and a stop bit.  This function is used to retrieve
3191  *      data after the address of a byte in the EEPROM has been
3192  *      sent.
3193  *
3194  **************************************************************/
3195
3196 static void tlan_ee_receive_byte(u16 io_base, u8 *data, int stop)
3197 {
3198         u8  place;
3199         u16 sio;
3200
3201         outw(TLAN_NET_SIO, io_base + TLAN_DIO_ADR);
3202         sio = io_base + TLAN_DIO_DATA + TLAN_NET_SIO;
3203         *data = 0;
3204
3205         /* Assume clock is low, tx is enabled; */
3206         tlan_clear_bit(TLAN_NET_SIO_ETXEN, sio);
3207         for (place = 0x80; place; place >>= 1) {
3208                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3209                 if (tlan_get_bit(TLAN_NET_SIO_EDATA, sio))
3210                         *data |= place;
3211                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3212         }
3213
3214         tlan_set_bit(TLAN_NET_SIO_ETXEN, sio);
3215         if (!stop) {
3216                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio); /* ack = 0 */
3217                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3218                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3219         } else {
3220                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);  /* no ack = 1 (?) */
3221                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3222                 tlan_clear_bit(TLAN_NET_SIO_ECLOK, sio);
3223                 /* STOP, raise data while clock is high */
3224                 tlan_clear_bit(TLAN_NET_SIO_EDATA, sio);
3225                 tlan_set_bit(TLAN_NET_SIO_ECLOK, sio);
3226                 tlan_set_bit(TLAN_NET_SIO_EDATA, sio);
3227         }
3228
3229 }
3230
3231
3232
3233
3234 /***************************************************************
3235  *      tlan_ee_read_byte
3236  *
3237  *      Returns:
3238  *              No error = 0, else, the stage at which the error
3239  *              occurred.
3240  *      Parms:
3241  *              io_base         The IO port base address for the
3242  *                              TLAN device with the EEPROM to
3243  *                              use.
3244  *              ee_addr         The address of the byte in the
3245  *                              EEPROM whose contents are to be
3246  *                              retrieved.
3247  *              data            An address to a char to hold the
3248  *                              data obtained from the EEPROM.
3249  *
3250  *      This function reads a byte of information from an byte
3251  *      cell in the EEPROM.
3252  *
3253  **************************************************************/
3254
3255 static int tlan_ee_read_byte(struct net_device *dev, u8 ee_addr, u8 *data)
3256 {
3257         int err;
3258         struct tlan_priv *priv = netdev_priv(dev);
3259         unsigned long flags = 0;
3260         int ret = 0;
3261
3262         spin_lock_irqsave(&priv->lock, flags);
3263
3264         tlan_ee_send_start(dev->base_addr);
3265         err = tlan_ee_send_byte(dev->base_addr, 0xa0, TLAN_EEPROM_ACK);
3266         if (err) {
3267                 ret = 1;
3268                 goto fail;
3269         }
3270         err = tlan_ee_send_byte(dev->base_addr, ee_addr, TLAN_EEPROM_ACK);
3271         if (err) {
3272                 ret = 2;
3273                 goto fail;
3274         }
3275         tlan_ee_send_start(dev->base_addr);
3276         err = tlan_ee_send_byte(dev->base_addr, 0xa1, TLAN_EEPROM_ACK);
3277         if (err) {
3278                 ret = 3;
3279                 goto fail;
3280         }
3281         tlan_ee_receive_byte(dev->base_addr, data, TLAN_EEPROM_STOP);
3282 fail:
3283         spin_unlock_irqrestore(&priv->lock, flags);
3284
3285         return ret;
3286
3287 }
3288
3289
3290