root/drivers/net/ethernet/hp/hp100.c

DEFINITIONS

1. virt_to_whatever
2. pdl_map_data
3. wait
4. hp100_read_id
5. hp100_isa_probe1
6. hp100_isa_probe
7. hp100_probe
8. hp100_probe1
9. hp100_hwinit
10. hp100_mmuinit
11. hp100_open
12. hp100_close
13. hp100_init_pdls
14. hp100_init_rxpdl
15. hp100_init_txpdl
16. hp100_build_rx_pdl
17. hp100_rxfill
18. hp100_BM_shutdown
19. hp100_check_lan
20. hp100_start_xmit_bm
21. hp100_clean_txring
22. hp100_start_xmit
23. hp100_rx
24. hp100_rx_bm
25. hp100_get_stats
26. hp100_update_stats
27. hp100_misc_interrupt
28. hp100_clear_stats
29. hp100_set_multicast_list
30. hp100_interrupt
31. hp100_start_interface
32. hp100_stop_interface
33. hp100_load_eeprom
34. hp100_sense_lan
35. hp100_down_vg_link
36. hp100_login_to_vg_hub
37. hp100_cascade_reset
38. hp100_RegisterDump
39. cleanup_dev
40. hp100_eisa_probe
41. hp100_eisa_remove
42. hp100_pci_probe
43. hp100_pci_remove
44. hp100_isa_init
45. hp100_isa_cleanup
46. hp100_module_init
47. hp100_module_exit

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3 ** hp100.c
   4 ** HP CASCADE Architecture Driver for 100VG-AnyLan Network Adapters
   5 **
   6 ** $Id: hp100.c,v 1.58 2001/09/24 18:03:01 perex Exp perex $
   7 **
   8 ** Based on the HP100 driver written by Jaroslav Kysela <perex@jcu.cz>
   9 ** Extended for new busmaster capable chipsets by
  10 ** Siegfried "Frieder" Loeffler (dg1sek) <floeff@mathematik.uni-stuttgart.de>
  11 **
  12 ** Maintained by: Jaroslav Kysela <perex@perex.cz>
  13 **
  14 ** This driver has only been tested with
  15 ** -- HP J2585B 10/100 Mbit/s PCI Busmaster
  16 ** -- HP J2585A 10/100 Mbit/s PCI
  17 ** -- HP J2970A 10 Mbit/s PCI Combo 10base-T/BNC
  18 ** -- HP J2973A 10 Mbit/s PCI 10base-T
  19 ** -- HP J2573  10/100 ISA
  20 ** -- Compex ReadyLink ENET100-VG4  10/100 Mbit/s PCI / EISA
  21 ** -- Compex FreedomLine 100/VG  10/100 Mbit/s ISA / EISA / PCI
  22 **
  23 ** but it should also work with the other CASCADE based adapters.
  24 **
  25 ** TODO:
  26 **       -  J2573 seems to hang sometimes when in shared memory mode.
  27 **       -  Mode for Priority TX
  28 **       -  Check PCI registers, performance might be improved?
  29 **       -  To reduce interrupt load in busmaster, one could switch off
  30 **          the interrupts that are used to refill the queues whenever the
  31 **          queues are filled up to more than a certain threshold.
  32 **       -  some updates for EISA version of card
  33 **
  34 **
  35 **
  36 ** 1.57c -> 1.58
  37 **   - used indent to change coding-style
  38 **   - added KTI DP-200 EISA ID
  39 **   - ioremap is also used for low (<1MB) memory (multi-architecture support)
  40 **
  41 ** 1.57b -> 1.57c - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  42 **   - release resources on failure in init_module
  43 **
  44 ** 1.57 -> 1.57b - Jean II
  45 **   - fix spinlocks, SMP is now working !
  46 **
  47 ** 1.56 -> 1.57
  48 **   - updates for new PCI interface for 2.1 kernels
  49 **
  50 ** 1.55 -> 1.56
  51 **   - removed printk in misc. interrupt and update statistics to allow
  52 **     monitoring of card status
  53 **   - timing changes in xmit routines, relogin to 100VG hub added when
  54 **     driver does reset
  55 **   - included fix for Compex FreedomLine PCI adapter
  56 **
  57 ** 1.54 -> 1.55
  58 **   - fixed bad initialization in init_module
  59 **   - added Compex FreedomLine adapter
  60 **   - some fixes in card initialization
  61 **
  62 ** 1.53 -> 1.54
  63 **   - added hardware multicast filter support (doesn't work)
  64 **   - little changes in hp100_sense_lan routine
  65 **     - added support for Coax and AUI (J2970)
  66 **   - fix for multiple cards and hp100_mode parameter (insmod)
  67 **   - fix for shared IRQ
  68 **
  69 ** 1.52 -> 1.53
  70 **   - fixed bug in multicast support
  71 **
  72 */
  73 
  74 #define HP100_DEFAULT_PRIORITY_TX 0
  75 
  76 #undef HP100_DEBUG
  77 #undef HP100_DEBUG_B            /* Trace  */
  78 #undef HP100_DEBUG_BM           /* Debug busmaster code (PDL stuff) */
  79 
  80 #undef HP100_DEBUG_TRAINING     /* Debug login-to-hub procedure */
  81 #undef HP100_DEBUG_TX
  82 #undef HP100_DEBUG_IRQ
  83 #undef HP100_DEBUG_RX
  84 
  85 #undef HP100_MULTICAST_FILTER   /* Need to be debugged... */
  86 
  87 #include <linux/module.h>
  88 #include <linux/kernel.h>
  89 #include <linux/sched.h>
  90 #include <linux/string.h>
  91 #include <linux/errno.h>
  92 #include <linux/ioport.h>
  93 #include <linux/interrupt.h>
  94 #include <linux/eisa.h>
  95 #include <linux/pci.h>
  96 #include <linux/dma-mapping.h>
  97 #include <linux/spinlock.h>
  98 #include <linux/netdevice.h>
  99 #include <linux/etherdevice.h>
 100 #include <linux/skbuff.h>
 101 #include <linux/types.h>
 102 #include <linux/delay.h>
 103 #include <linux/init.h>
 104 #include <linux/bitops.h>
 105 #include <linux/jiffies.h>
 106 
 107 #include <asm/io.h>
 108 
 109 #include "hp100.h"
 110 
 111 /*
 112  *  defines
 113  */
 114 
 115 #define HP100_BUS_ISA     0
 116 #define HP100_BUS_EISA    1
 117 #define HP100_BUS_PCI     2
 118 
 119 #define HP100_REGION_SIZE       0x20    /* for ioports */
 120 #define HP100_SIG_LEN           8       /* same as EISA_SIG_LEN */
 121 
 122 #define HP100_MAX_PACKET_SIZE   (1536+4)
 123 #define HP100_MIN_PACKET_SIZE   60
 124 
 125 #ifndef HP100_DEFAULT_RX_RATIO
 126 /* default - 75% onboard memory on the card are used for RX packets */
 127 #define HP100_DEFAULT_RX_RATIO  75
 128 #endif
 129 
 130 #ifndef HP100_DEFAULT_PRIORITY_TX
 131 /* default - don't enable transmit outgoing packets as priority */
 132 #define HP100_DEFAULT_PRIORITY_TX 0
 133 #endif
 134 
 135 /*
 136  *  structures
 137  */
 138 
 139 struct hp100_private {
 140         spinlock_t lock;
 141         char id[HP100_SIG_LEN];
 142         u_short chip;
 143         u_short soft_model;
 144         u_int memory_size;
 145         u_int virt_memory_size;
 146         u_short rx_ratio;       /* 1 - 99 */
 147         u_short priority_tx;    /* != 0 - priority tx */
 148         u_short mode;           /* PIO, Shared Mem or Busmaster */
 149         u_char bus;
 150         struct pci_dev *pci_dev;
 151         short mem_mapped;       /* memory mapped access */
 152         void __iomem *mem_ptr_virt;     /* virtual memory mapped area, maybe NULL */
 153         unsigned long mem_ptr_phys;     /* physical memory mapped area */
 154         short lan_type;         /* 10Mb/s, 100Mb/s or -1 (error) */
 155         int hub_status;         /* was login to hub successful? */
 156         u_char mac1_mode;
 157         u_char mac2_mode;
 158         u_char hash_bytes[8];
 159 
 160         /* Rings for busmaster mode: */
 161         hp100_ring_t *rxrhead;  /* Head (oldest) index into rxring */
 162         hp100_ring_t *rxrtail;  /* Tail (newest) index into rxring */
 163         hp100_ring_t *txrhead;  /* Head (oldest) index into txring */
 164         hp100_ring_t *txrtail;  /* Tail (newest) index into txring */
 165 
 166         hp100_ring_t rxring[MAX_RX_PDL];
 167         hp100_ring_t txring[MAX_TX_PDL];
 168 
 169         u_int *page_vaddr_algn; /* Aligned virtual address of allocated page */
 170         u_long whatever_offset; /* Offset to bus/phys/dma address */
 171         int rxrcommit;          /* # Rx PDLs committed to adapter */
 172         int txrcommit;          /* # Tx PDLs committed to adapter */
 173 };
 174 
 175 /*
 176  *  variables
 177  */
 178 #ifdef CONFIG_ISA
 179 static const char *hp100_isa_tbl[] = {
 180         "HWPF150", /* HP J2573 rev A */
 181         "HWP1950", /* HP J2573 */
 182 };
 183 #endif
 184 
 185 static const struct eisa_device_id hp100_eisa_tbl[] = {
 186         { "HWPF180" }, /* HP J2577 rev A */
 187         { "HWP1920" }, /* HP 27248B */
 188         { "HWP1940" }, /* HP J2577 */
 189         { "HWP1990" }, /* HP J2577 */
 190         { "CPX0301" }, /* ReadyLink ENET100-VG4 */
 191         { "CPX0401" }, /* FreedomLine 100/VG */
 192         { "" }         /* Mandatory final entry ! */
 193 };
 194 MODULE_DEVICE_TABLE(eisa, hp100_eisa_tbl);
 195 
 196 static const struct pci_device_id hp100_pci_tbl[] = {
 197         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2585A, PCI_ANY_ID, PCI_ANY_ID,},
 198         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2585B, PCI_ANY_ID, PCI_ANY_ID,},
 199         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2970A, PCI_ANY_ID, PCI_ANY_ID,},
 200         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2973A, PCI_ANY_ID, PCI_ANY_ID,},
 201         {PCI_VENDOR_ID_COMPEX, PCI_DEVICE_ID_COMPEX_ENET100VG4, PCI_ANY_ID, PCI_ANY_ID,},
 202         {PCI_VENDOR_ID_COMPEX2, PCI_DEVICE_ID_COMPEX2_100VG, PCI_ANY_ID, PCI_ANY_ID,},
 203 /*      {PCI_VENDOR_ID_KTI, PCI_DEVICE_ID_KTI_DP200, PCI_ANY_ID, PCI_ANY_ID }, */
 204         {}                      /* Terminating entry */
 205 };
 206 MODULE_DEVICE_TABLE(pci, hp100_pci_tbl);
 207 
 208 static int hp100_rx_ratio = HP100_DEFAULT_RX_RATIO;
 209 static int hp100_priority_tx = HP100_DEFAULT_PRIORITY_TX;
 210 static int hp100_mode = 1;
 211 
 212 module_param(hp100_rx_ratio, int, 0);
 213 module_param(hp100_priority_tx, int, 0);
 214 module_param(hp100_mode, int, 0);
 215 
 216 /*
 217  *  prototypes
 218  */
 219 
 220 static int hp100_probe1(struct net_device *dev, int ioaddr, u_char bus,
 221                         struct pci_dev *pci_dev);
 222 
 223 
 224 static int hp100_open(struct net_device *dev);
 225 static int hp100_close(struct net_device *dev);
 226 static netdev_tx_t hp100_start_xmit(struct sk_buff *skb,
 227                                     struct net_device *dev);
 228 static netdev_tx_t hp100_start_xmit_bm(struct sk_buff *skb,
 229                                        struct net_device *dev);
 230 static void hp100_rx(struct net_device *dev);
 231 static struct net_device_stats *hp100_get_stats(struct net_device *dev);
 232 static void hp100_misc_interrupt(struct net_device *dev);
 233 static void hp100_update_stats(struct net_device *dev);
 234 static void hp100_clear_stats(struct hp100_private *lp, int ioaddr);
 235 static void hp100_set_multicast_list(struct net_device *dev);
 236 static irqreturn_t hp100_interrupt(int irq, void *dev_id);
 237 static void hp100_start_interface(struct net_device *dev);
 238 static void hp100_stop_interface(struct net_device *dev);
 239 static void hp100_load_eeprom(struct net_device *dev, u_short ioaddr);
 240 static int hp100_sense_lan(struct net_device *dev);
 241 static int hp100_login_to_vg_hub(struct net_device *dev,
 242                                  u_short force_relogin);
 243 static int hp100_down_vg_link(struct net_device *dev);
 244 static void hp100_cascade_reset(struct net_device *dev, u_short enable);
 245 static void hp100_BM_shutdown(struct net_device *dev);
 246 static void hp100_mmuinit(struct net_device *dev);
 247 static void hp100_init_pdls(struct net_device *dev);
 248 static int hp100_init_rxpdl(struct net_device *dev,
 249                             register hp100_ring_t * ringptr,
 250                             register u_int * pdlptr);
 251 static int hp100_init_txpdl(struct net_device *dev,
 252                             register hp100_ring_t * ringptr,
 253                             register u_int * pdlptr);
 254 static void hp100_rxfill(struct net_device *dev);
 255 static void hp100_hwinit(struct net_device *dev);
 256 static void hp100_clean_txring(struct net_device *dev);
 257 #ifdef HP100_DEBUG
 258 static void hp100_RegisterDump(struct net_device *dev);
 259 #endif
 260 
 261 /* Conversion to new PCI API :
 262  * Convert an address in a kernel buffer to a bus/phys/dma address.
 263  * This work *only* for memory fragments part of lp->page_vaddr,
 264  * because it was properly DMA allocated via pci_alloc_consistent(),
 265  * so we just need to "retrieve" the original mapping to bus/phys/dma
 266  * address - Jean II */
 267 static inline dma_addr_t virt_to_whatever(struct net_device *dev, u32 * ptr)
 268 {
 269         struct hp100_private *lp = netdev_priv(dev);
 270         return ((u_long) ptr) + lp->whatever_offset;
 271 }
 272 
 273 static inline u_int pdl_map_data(struct hp100_private *lp, void *data)
 274 {
 275         return pci_map_single(lp->pci_dev, data,
 276                               MAX_ETHER_SIZE, PCI_DMA_FROMDEVICE);
 277 }
 278 
 279 /* TODO: This function should not really be needed in a good design... */
 280 static void wait(void)
 281 {
 282         mdelay(1);
 283 }
 284 
 285 /*
 286  *  probe functions
 287  *  These functions should - if possible - avoid doing write operations
 288  *  since this could cause problems when the card is not installed.
 289  */
 290 
 291 /*
 292  * Read board id and convert to string.
 293  * Effectively same code as decode_eisa_sig
 294  */
 295 static const char *hp100_read_id(int ioaddr)
 296 {
 297         int i;
 298         static char str[HP100_SIG_LEN];
 299         unsigned char sig[4], sum;
 300         unsigned short rev;
 301 
 302         hp100_page(ID_MAC_ADDR);
 303         sum = 0;
 304         for (i = 0; i < 4; i++) {
 305                 sig[i] = hp100_inb(BOARD_ID + i);
 306                 sum += sig[i];
 307         }
 308 
 309         sum += hp100_inb(BOARD_ID + i);
 310         if (sum != 0xff)
 311                 return NULL;    /* bad checksum */
 312 
 313         str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
 314         str[1] = (((sig[0] & 3) << 3) | (sig[1] >> 5)) + ('A' - 1);
 315         str[2] = (sig[1] & 0x1f) + ('A' - 1);
 316         rev = (sig[2] << 8) | sig[3];
 317         sprintf(str + 3, "%04X", rev);
 318 
 319         return str;
 320 }
 321 
 322 #ifdef CONFIG_ISA
 323 static __init int hp100_isa_probe1(struct net_device *dev, int ioaddr)
 324 {
 325         const char *sig;
 326         int i;
 327 
 328         if (!request_region(ioaddr, HP100_REGION_SIZE, "hp100"))
 329                 goto err;
 330 
 331         if (hp100_inw(HW_ID) != HP100_HW_ID_CASCADE) {
 332                 release_region(ioaddr, HP100_REGION_SIZE);
 333                 goto err;
 334         }
 335 
 336         sig = hp100_read_id(ioaddr);
 337         release_region(ioaddr, HP100_REGION_SIZE);
 338 
 339         if (sig == NULL)
 340                 goto err;
 341 
 342         for (i = 0; i < ARRAY_SIZE(hp100_isa_tbl); i++) {
 343                 if (!strcmp(hp100_isa_tbl[i], sig))
 344                         break;
 345 
 346         }
 347 
 348         if (i < ARRAY_SIZE(hp100_isa_tbl))
 349                 return hp100_probe1(dev, ioaddr, HP100_BUS_ISA, NULL);
 350  err:
 351         return -ENODEV;
 352 
 353 }
 354 /*
 355  * Probe for ISA board.
 356  * EISA and PCI are handled by device infrastructure.
 357  */
 358 
 359 static int  __init hp100_isa_probe(struct net_device *dev, int addr)
 360 {
 361         int err = -ENODEV;
 362 
 363         /* Probe for a specific ISA address */
 364         if (addr > 0xff && addr < 0x400)
 365                 err = hp100_isa_probe1(dev, addr);
 366 
 367         else if (addr != 0)
 368                 err = -ENXIO;
 369 
 370         else {
 371                 /* Probe all ISA possible port regions */
 372                 for (addr = 0x100; addr < 0x400; addr += 0x20) {
 373                         err = hp100_isa_probe1(dev, addr);
 374                         if (!err)
 375                                 break;
 376                 }
 377         }
 378         return err;
 379 }
 380 #endif /* CONFIG_ISA */
 381 
 382 #if !defined(MODULE) && defined(CONFIG_ISA)
 383 struct net_device * __init hp100_probe(int unit)
 384 {
 385         struct net_device *dev = alloc_etherdev(sizeof(struct hp100_private));
 386         int err;
 387 
 388         if (!dev)
 389                 return ERR_PTR(-ENODEV);
 390 
 391 #ifdef HP100_DEBUG_B
 392         hp100_outw(0x4200, TRACE);
 393         printk("hp100: %s: probe\n", dev->name);
 394 #endif
 395 
 396         if (unit >= 0) {
 397                 sprintf(dev->name, "eth%d", unit);
 398                 netdev_boot_setup_check(dev);
 399         }
 400 
 401         err = hp100_isa_probe(dev, dev->base_addr);
 402         if (err)
 403                 goto out;
 404 
 405         return dev;
 406  out:
 407         free_netdev(dev);
 408         return ERR_PTR(err);
 409 }
 410 #endif /* !MODULE && CONFIG_ISA */
 411 
 412 static const struct net_device_ops hp100_bm_netdev_ops = {
 413         .ndo_open               = hp100_open,
 414         .ndo_stop               = hp100_close,
 415         .ndo_start_xmit         = hp100_start_xmit_bm,
 416         .ndo_get_stats          = hp100_get_stats,
 417         .ndo_set_rx_mode        = hp100_set_multicast_list,
 418         .ndo_set_mac_address    = eth_mac_addr,
 419         .ndo_validate_addr      = eth_validate_addr,
 420 };
 421 
 422 static const struct net_device_ops hp100_netdev_ops = {
 423         .ndo_open               = hp100_open,
 424         .ndo_stop               = hp100_close,
 425         .ndo_start_xmit         = hp100_start_xmit,
 426         .ndo_get_stats          = hp100_get_stats,
 427         .ndo_set_rx_mode        = hp100_set_multicast_list,
 428         .ndo_set_mac_address    = eth_mac_addr,
 429         .ndo_validate_addr      = eth_validate_addr,
 430 };
 431 
 432 static int hp100_probe1(struct net_device *dev, int ioaddr, u_char bus,
 433                         struct pci_dev *pci_dev)
 434 {
 435         int i;
 436         int err = -ENODEV;
 437         const char *eid;
 438         u_int chip;
 439         u_char uc;
 440         u_int memory_size = 0, virt_memory_size = 0;
 441         u_short local_mode, lsw;
 442         short mem_mapped;
 443         unsigned long mem_ptr_phys;
 444         void __iomem *mem_ptr_virt;
 445         struct hp100_private *lp;
 446 
 447 #ifdef HP100_DEBUG_B
 448         hp100_outw(0x4201, TRACE);
 449         printk("hp100: %s: probe1\n", dev->name);
 450 #endif
 451 
 452         /* memory region for programmed i/o */
 453         if (!request_region(ioaddr, HP100_REGION_SIZE, "hp100"))
 454                 goto out1;
 455 
 456         if (hp100_inw(HW_ID) != HP100_HW_ID_CASCADE)
 457                 goto out2;
 458 
 459         chip = hp100_inw(PAGING) & HP100_CHIPID_MASK;
 460 #ifdef HP100_DEBUG
 461         if (chip == HP100_CHIPID_SHASTA)
 462                 printk("hp100: %s: Shasta Chip detected. (This is a pre 802.12 chip)\n", dev->name);
 463         else if (chip == HP100_CHIPID_RAINIER)
 464                 printk("hp100: %s: Rainier Chip detected. (This is a pre 802.12 chip)\n", dev->name);
 465         else if (chip == HP100_CHIPID_LASSEN)
 466                 printk("hp100: %s: Lassen Chip detected.\n", dev->name);
 467         else
 468                 printk("hp100: %s: Warning: Unknown CASCADE chip (id=0x%.4x).\n", dev->name, chip);
 469 #endif
 470 
 471         dev->base_addr = ioaddr;
 472 
 473         eid = hp100_read_id(ioaddr);
 474         if (eid == NULL) {      /* bad checksum? */
 475                 printk(KERN_WARNING "%s: bad ID checksum at base port 0x%x\n",
 476                        __func__, ioaddr);
 477                 goto out2;
 478         }
 479 
 480         hp100_page(ID_MAC_ADDR);
 481         for (i = uc = 0; i < 7; i++)
 482                 uc += hp100_inb(LAN_ADDR + i);
 483         if (uc != 0xff) {
 484                 printk(KERN_WARNING
 485                        "%s: bad lan address checksum at port 0x%x)\n",
 486                        __func__, ioaddr);
 487                 err = -EIO;
 488                 goto out2;
 489         }
 490 
 491         /* Make sure, that all registers are correctly updated... */
 492 
 493         hp100_load_eeprom(dev, ioaddr);
 494         wait();
 495 
 496         /*
 497          * Determine driver operation mode
 498          *
 499          * Use the variable "hp100_mode" upon insmod or as kernel parameter to
 500          * force driver modes:
 501          * hp100_mode=1 -> default, use busmaster mode if configured.
 502          * hp100_mode=2 -> enable shared memory mode
 503          * hp100_mode=3 -> force use of i/o mapped mode.
 504          * hp100_mode=4 -> same as 1, but re-set the enable bit on the card.
 505          */
 506 
 507         /*
 508          * LSW values:
 509          *   0x2278 -> J2585B, PnP shared memory mode
 510          *   0x2270 -> J2585B, shared memory mode, 0xdc000
 511          *   0xa23c -> J2585B, I/O mapped mode
 512          *   0x2240 -> EISA COMPEX, BusMaster (Shasta Chip)
 513          *   0x2220 -> EISA HP, I/O (Shasta Chip)
 514          *   0x2260 -> EISA HP, BusMaster (Shasta Chip)
 515          */
 516 
 517 #if 0
 518         local_mode = 0x2270;
 519         hp100_outw(0xfefe, OPTION_LSW);
 520         hp100_outw(local_mode | HP100_SET_LB | HP100_SET_HB, OPTION_LSW);
 521 #endif
 522 
 523         /* hp100_mode value maybe used in future by another card */
 524         local_mode = hp100_mode;
 525         if (local_mode < 1 || local_mode > 4)
 526                 local_mode = 1; /* default */
 527 #ifdef HP100_DEBUG
 528         printk("hp100: %s: original LSW = 0x%x\n", dev->name,
 529                hp100_inw(OPTION_LSW));
 530 #endif
 531 
 532         if (local_mode == 3) {
 533                 hp100_outw(HP100_MEM_EN | HP100_RESET_LB, OPTION_LSW);
 534                 hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
 535                 hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
 536                 printk("hp100: IO mapped mode forced.\n");
 537         } else if (local_mode == 2) {
 538                 hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
 539                 hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
 540                 hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
 541                 printk("hp100: Shared memory mode requested.\n");
 542         } else if (local_mode == 4) {
 543                 if (chip == HP100_CHIPID_LASSEN) {
 544                         hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_SET_HB, OPTION_LSW);
 545                         hp100_outw(HP100_IO_EN | HP100_MEM_EN | HP100_RESET_LB, OPTION_LSW);
 546                         printk("hp100: Busmaster mode requested.\n");
 547                 }
 548                 local_mode = 1;
 549         }
 550 
 551         if (local_mode == 1) {  /* default behaviour */
 552                 lsw = hp100_inw(OPTION_LSW);
 553 
 554                 if ((lsw & HP100_IO_EN) && (~lsw & HP100_MEM_EN) &&
 555                     (~lsw & (HP100_BM_WRITE | HP100_BM_READ))) {
 556 #ifdef HP100_DEBUG
 557                         printk("hp100: %s: IO_EN bit is set on card.\n", dev->name);
 558 #endif
 559                         local_mode = 3;
 560                 } else if (chip == HP100_CHIPID_LASSEN &&
 561                            (lsw & (HP100_BM_WRITE | HP100_BM_READ)) == (HP100_BM_WRITE | HP100_BM_READ)) {
 562                         /* Conversion to new PCI API :
 563                          * I don't have the doc, but I assume that the card
 564                          * can map the full 32bit address space.
 565                          * Also, we can have EISA Busmaster cards (not tested),
 566                          * so beware !!! - Jean II */
 567                         if((bus == HP100_BUS_PCI) &&
 568                            (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32)))) {
 569                                 /* Gracefully fallback to shared memory */
 570                                 goto busmasterfail;
 571                         }
 572                         printk("hp100: Busmaster mode enabled.\n");
 573                         hp100_outw(HP100_MEM_EN | HP100_IO_EN | HP100_RESET_LB, OPTION_LSW);
 574                 } else {
 575                 busmasterfail:
 576 #ifdef HP100_DEBUG
 577                         printk("hp100: %s: Card not configured for BM or BM not supported with this card.\n", dev->name);
 578                         printk("hp100: %s: Trying shared memory mode.\n", dev->name);
 579 #endif
 580                         /* In this case, try shared memory mode */
 581                         local_mode = 2;
 582                         hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
 583                         /* hp100_outw(HP100_IO_EN|HP100_RESET_LB, OPTION_LSW); */
 584                 }
 585         }
 586 #ifdef HP100_DEBUG
 587         printk("hp100: %s: new LSW = 0x%x\n", dev->name, hp100_inw(OPTION_LSW));
 588 #endif
 589 
 590         /* Check for shared memory on the card, eventually remap it */
 591         hp100_page(HW_MAP);
 592         mem_mapped = ((hp100_inw(OPTION_LSW) & (HP100_MEM_EN)) != 0);
 593         mem_ptr_phys = 0UL;
 594         mem_ptr_virt = NULL;
 595         memory_size = (8192 << ((hp100_inb(SRAM) >> 5) & 0x07));
 596         virt_memory_size = 0;
 597 
 598         /* For memory mapped or busmaster mode, we want the memory address */
 599         if (mem_mapped || (local_mode == 1)) {
 600                 mem_ptr_phys = (hp100_inw(MEM_MAP_LSW) | (hp100_inw(MEM_MAP_MSW) << 16));
 601                 mem_ptr_phys &= ~0x1fff;        /* 8k alignment */
 602 
 603                 if (bus == HP100_BUS_ISA && (mem_ptr_phys & ~0xfffff) != 0) {
 604                         printk("hp100: Can only use programmed i/o mode.\n");
 605                         mem_ptr_phys = 0;
 606                         mem_mapped = 0;
 607                         local_mode = 3; /* Use programmed i/o */
 608                 }
 609 
 610                 /* We do not need access to shared memory in busmaster mode */
 611                 /* However in slave mode we need to remap high (>1GB) card memory  */
 612                 if (local_mode != 1) {  /* = not busmaster */
 613                         /* We try with smaller memory sizes, if ioremap fails */
 614                         for (virt_memory_size = memory_size; virt_memory_size > 16383; virt_memory_size >>= 1) {
 615                                 if ((mem_ptr_virt = ioremap((u_long) mem_ptr_phys, virt_memory_size)) == NULL) {
 616 #ifdef HP100_DEBUG
 617                                         printk("hp100: %s: ioremap for 0x%x bytes high PCI memory at 0x%lx failed\n", dev->name, virt_memory_size, mem_ptr_phys);
 618 #endif
 619                                 } else {
 620 #ifdef HP100_DEBUG
 621                                         printk("hp100: %s: remapped 0x%x bytes high PCI memory at 0x%lx to %p.\n", dev->name, virt_memory_size, mem_ptr_phys, mem_ptr_virt);
 622 #endif
 623                                         break;
 624                                 }
 625                         }
 626 
 627                         if (mem_ptr_virt == NULL) {     /* all ioremap tries failed */
 628                                 printk("hp100: Failed to ioremap the PCI card memory. Will have to use i/o mapped mode.\n");
 629                                 local_mode = 3;
 630                                 virt_memory_size = 0;
 631                         }
 632                 }
 633         }
 634 
 635         if (local_mode == 3) {  /* io mapped forced */
 636                 mem_mapped = 0;
 637                 mem_ptr_phys = 0;
 638                 mem_ptr_virt = NULL;
 639                 printk("hp100: Using (slow) programmed i/o mode.\n");
 640         }
 641 
 642         /* Initialise the "private" data structure for this card. */
 643         lp = netdev_priv(dev);
 644 
 645         spin_lock_init(&lp->lock);
 646         strlcpy(lp->id, eid, HP100_SIG_LEN);
 647         lp->chip = chip;
 648         lp->mode = local_mode;
 649         lp->bus = bus;
 650         lp->pci_dev = pci_dev;
 651         lp->priority_tx = hp100_priority_tx;
 652         lp->rx_ratio = hp100_rx_ratio;
 653         lp->mem_ptr_phys = mem_ptr_phys;
 654         lp->mem_ptr_virt = mem_ptr_virt;
 655         hp100_page(ID_MAC_ADDR);
 656         lp->soft_model = hp100_inb(SOFT_MODEL);
 657         lp->mac1_mode = HP100_MAC1MODE3;
 658         lp->mac2_mode = HP100_MAC2MODE3;
 659         memset(&lp->hash_bytes, 0x00, 8);
 660 
 661         dev->base_addr = ioaddr;
 662 
 663         lp->memory_size = memory_size;
 664         lp->virt_memory_size = virt_memory_size;
 665         lp->rx_ratio = hp100_rx_ratio;  /* can be conf'd with insmod */
 666 
 667         if (lp->mode == 1)      /* busmaster */
 668                 dev->netdev_ops = &hp100_bm_netdev_ops;
 669         else
 670                 dev->netdev_ops = &hp100_netdev_ops;
 671 
 672         /* Ask the card for which IRQ line it is configured */
 673         if (bus == HP100_BUS_PCI) {
 674                 dev->irq = pci_dev->irq;
 675         } else {
 676                 hp100_page(HW_MAP);
 677                 dev->irq = hp100_inb(IRQ_CHANNEL) & HP100_IRQMASK;
 678                 if (dev->irq == 2)
 679                         dev->irq = 9;
 680         }
 681 
 682         if (lp->mode == 1)      /* busmaster */
 683                 dev->dma = 4;
 684 
 685         /* Ask the card for its MAC address and store it for later use. */
 686         hp100_page(ID_MAC_ADDR);
 687         for (i = uc = 0; i < 6; i++)
 688                 dev->dev_addr[i] = hp100_inb(LAN_ADDR + i);
 689 
 690         /* Reset statistics (counters) */
 691         hp100_clear_stats(lp, ioaddr);
 692 
 693         /* If busmaster mode is wanted, a dma-capable memory area is needed for
 694          * the rx and tx PDLs
 695          * PCI cards can access the whole PC memory. Therefore GFP_DMA is not
 696          * needed for the allocation of the memory area.
 697          */
 698 
 699         /* TODO: We do not need this with old cards, where PDLs are stored
 700          * in the cards shared memory area. But currently, busmaster has been
 701          * implemented/tested only with the lassen chip anyway... */
 702         if (lp->mode == 1) {    /* busmaster */
 703                 dma_addr_t page_baddr;
 704                 /* Get physically continuous memory for TX & RX PDLs    */
 705                 /* Conversion to new PCI API :
 706                  * Pages are always aligned and zeroed, no need to it ourself.
 707                  * Doc says should be OK for EISA bus as well - Jean II */
 708                 lp->page_vaddr_algn = pci_alloc_consistent(lp->pci_dev, MAX_RINGSIZE, &page_baddr);
 709                 if (!lp->page_vaddr_algn) {
 710                         err = -ENOMEM;
 711                         goto out_mem_ptr;
 712                 }
 713                 lp->whatever_offset = ((u_long) page_baddr) - ((u_long) lp->page_vaddr_algn);
 714 
 715 #ifdef HP100_DEBUG_BM
 716                 printk("hp100: %s: Reserved DMA memory from 0x%x to 0x%x\n", dev->name, (u_int) lp->page_vaddr_algn, (u_int) lp->page_vaddr_algn + MAX_RINGSIZE);
 717 #endif
 718                 lp->rxrcommit = lp->txrcommit = 0;
 719                 lp->rxrhead = lp->rxrtail = &(lp->rxring[0]);
 720                 lp->txrhead = lp->txrtail = &(lp->txring[0]);
 721         }
 722 
 723         /* Initialise the card. */
 724         /* (I'm not really sure if it's a good idea to do this during probing, but
 725          * like this it's assured that the lan connection type can be sensed
 726          * correctly)
 727          */
 728         hp100_hwinit(dev);
 729 
 730         /* Try to find out which kind of LAN the card is connected to. */
 731         lp->lan_type = hp100_sense_lan(dev);
 732 
 733         /* Print out a message what about what we think we have probed. */
 734         printk("hp100: at 0x%x, IRQ %d, ", ioaddr, dev->irq);
 735         switch (bus) {
 736         case HP100_BUS_EISA:
 737                 printk("EISA");
 738                 break;
 739         case HP100_BUS_PCI:
 740                 printk("PCI");
 741                 break;
 742         default:
 743                 printk("ISA");
 744                 break;
 745         }
 746         printk(" bus, %dk SRAM (rx/tx %d%%).\n", lp->memory_size >> 10, lp->rx_ratio);
 747 
 748         if (lp->mode == 2) {    /* memory mapped */
 749                 printk("hp100: Memory area at 0x%lx-0x%lx", mem_ptr_phys,
 750                                 (mem_ptr_phys + (mem_ptr_phys > 0x100000 ? (u_long) lp->memory_size : 16 * 1024)) - 1);
 751                 if (mem_ptr_virt)
 752                         printk(" (virtual base %p)", mem_ptr_virt);
 753                 printk(".\n");
 754 
 755                 /* Set for info when doing ifconfig */
 756                 dev->mem_start = mem_ptr_phys;
 757                 dev->mem_end = mem_ptr_phys + lp->memory_size;
 758         }
 759 
 760         printk("hp100: ");
 761         if (lp->lan_type != HP100_LAN_ERR)
 762                 printk("Adapter is attached to ");
 763         switch (lp->lan_type) {
 764         case HP100_LAN_100:
 765                 printk("100Mb/s Voice Grade AnyLAN network.\n");
 766                 break;
 767         case HP100_LAN_10:
 768                 printk("10Mb/s network (10baseT).\n");
 769                 break;
 770         case HP100_LAN_COAX:
 771                 printk("10Mb/s network (coax).\n");
 772                 break;
 773         default:
 774                 printk("Warning! Link down.\n");
 775         }
 776 
 777         err = register_netdev(dev);
 778         if (err)
 779                 goto out3;
 780 
 781         return 0;
 782 out3:
 783         if (local_mode == 1)
 784                 pci_free_consistent(lp->pci_dev, MAX_RINGSIZE + 0x0f,
 785                                     lp->page_vaddr_algn,
 786                                     virt_to_whatever(dev, lp->page_vaddr_algn));
 787 out_mem_ptr:
 788         if (mem_ptr_virt)
 789                 iounmap(mem_ptr_virt);
 790 out2:
 791         release_region(ioaddr, HP100_REGION_SIZE);
 792 out1:
 793         return err;
 794 }
 795 
 796 /* This procedure puts the card into a stable init state */
 797 static void hp100_hwinit(struct net_device *dev)
 798 {
 799         int ioaddr = dev->base_addr;
 800         struct hp100_private *lp = netdev_priv(dev);
 801 
 802 #ifdef HP100_DEBUG_B
 803         hp100_outw(0x4202, TRACE);
 804         printk("hp100: %s: hwinit\n", dev->name);
 805 #endif
 806 
 807         /* Initialise the card. -------------------------------------------- */
 808 
 809         /* Clear all pending Ints and disable Ints */
 810         hp100_page(PERFORMANCE);
 811         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
 812         hp100_outw(0xffff, IRQ_STATUS); /* clear all pending ints */
 813 
 814         hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
 815         hp100_outw(HP100_TRI_INT | HP100_SET_HB, OPTION_LSW);
 816 
 817         if (lp->mode == 1) {
 818                 hp100_BM_shutdown(dev); /* disables BM, puts cascade in reset */
 819                 wait();
 820         } else {
 821                 hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
 822                 hp100_cascade_reset(dev, 1);
 823                 hp100_page(MAC_CTRL);
 824                 hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);
 825         }
 826 
 827         /* Initiate EEPROM reload */
 828         hp100_load_eeprom(dev, 0);
 829 
 830         wait();
 831 
 832         /* Go into reset again. */
 833         hp100_cascade_reset(dev, 1);
 834 
 835         /* Set Option Registers to a safe state  */
 836         hp100_outw(HP100_DEBUG_EN |
 837                    HP100_RX_HDR |
 838                    HP100_EE_EN |
 839                    HP100_BM_WRITE |
 840                    HP100_BM_READ | HP100_RESET_HB |
 841                    HP100_FAKE_INT |
 842                    HP100_INT_EN |
 843                    HP100_MEM_EN |
 844                    HP100_IO_EN | HP100_RESET_LB, OPTION_LSW);
 845 
 846         hp100_outw(HP100_TRI_INT |
 847                    HP100_MMAP_DIS | HP100_SET_HB, OPTION_LSW);
 848 
 849         hp100_outb(HP100_PRIORITY_TX |
 850                    HP100_ADV_NXT_PKT |
 851                    HP100_TX_CMD | HP100_RESET_LB, OPTION_MSW);
 852 
 853         /* TODO: Configure MMU for Ram Test. */
 854         /* TODO: Ram Test. */
 855 
 856         /* Re-check if adapter is still at same i/o location      */
 857         /* (If the base i/o in eeprom has been changed but the    */
 858         /* registers had not been changed, a reload of the eeprom */
 859         /* would move the adapter to the address stored in eeprom */
 860 
 861         /* TODO: Code to implement. */
 862 
 863         /* Until here it was code from HWdiscover procedure. */
 864         /* Next comes code from mmuinit procedure of SCO BM driver which is
 865          * called from HWconfigure in the SCO driver.  */
 866 
 867         /* Initialise MMU, eventually switch on Busmaster Mode, initialise
 868          * multicast filter...
 869          */
 870         hp100_mmuinit(dev);
 871 
 872         /* We don't turn the interrupts on here - this is done by start_interface. */
 873         wait();                 /* TODO: Do we really need this? */
 874 
 875         /* Enable Hardware (e.g. unreset) */
 876         hp100_cascade_reset(dev, 0);
 877 
 878         /* ------- initialisation complete ----------- */
 879 
 880         /* Finally try to log in the Hub if there may be a VG connection. */
 881         if ((lp->lan_type == HP100_LAN_100) || (lp->lan_type == HP100_LAN_ERR))
 882                 hp100_login_to_vg_hub(dev, 0);  /* relogin */
 883 
 884 }
 885 
 886 
 887 /*
 888  * mmuinit - Reinitialise Cascade MMU and MAC settings.
 889  * Note: Must already be in reset and leaves card in reset.
 890  */
 891 static void hp100_mmuinit(struct net_device *dev)
 892 {
 893         int ioaddr = dev->base_addr;
 894         struct hp100_private *lp = netdev_priv(dev);
 895         int i;
 896 
 897 #ifdef HP100_DEBUG_B
 898         hp100_outw(0x4203, TRACE);
 899         printk("hp100: %s: mmuinit\n", dev->name);
 900 #endif
 901 
 902 #ifdef HP100_DEBUG
 903         if (0 != (hp100_inw(OPTION_LSW) & HP100_HW_RST)) {
 904                 printk("hp100: %s: Not in reset when entering mmuinit. Fix me.\n", dev->name);
 905                 return;
 906         }
 907 #endif
 908 
 909         /* Make sure IRQs are masked off and ack'ed. */
 910         hp100_page(PERFORMANCE);
 911         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
 912         hp100_outw(0xffff, IRQ_STATUS); /* ack IRQ */
 913 
 914         /*
 915          * Enable Hardware
 916          * - Clear Debug En, Rx Hdr Pipe, EE En, I/O En, Fake Int and Intr En
 917          * - Set Tri-State Int, Bus Master Rd/Wr, and Mem Map Disable
 918          * - Clear Priority, Advance Pkt and Xmit Cmd
 919          */
 920 
 921         hp100_outw(HP100_DEBUG_EN |
 922                    HP100_RX_HDR |
 923                    HP100_EE_EN | HP100_RESET_HB |
 924                    HP100_IO_EN |
 925                    HP100_FAKE_INT |
 926                    HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
 927 
 928         hp100_outw(HP100_TRI_INT | HP100_SET_HB, OPTION_LSW);
 929 
 930         if (lp->mode == 1) {    /* busmaster */
 931                 hp100_outw(HP100_BM_WRITE |
 932                            HP100_BM_READ |
 933                            HP100_MMAP_DIS | HP100_SET_HB, OPTION_LSW);
 934         } else if (lp->mode == 2) {     /* memory mapped */
 935                 hp100_outw(HP100_BM_WRITE |
 936                            HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
 937                 hp100_outw(HP100_MMAP_DIS | HP100_RESET_HB, OPTION_LSW);
 938                 hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
 939                 hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
 940         } else if (lp->mode == 3) {     /* i/o mapped mode */
 941                 hp100_outw(HP100_MMAP_DIS | HP100_SET_HB |
 942                            HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
 943         }
 944 
 945         hp100_page(HW_MAP);
 946         hp100_outb(0, EARLYRXCFG);
 947         hp100_outw(0, EARLYTXCFG);
 948 
 949         /*
 950          * Enable Bus Master mode
 951          */
 952         if (lp->mode == 1) {    /* busmaster */
 953                 /* Experimental: Set some PCI configuration bits */
 954                 hp100_page(HW_MAP);
 955                 hp100_andb(~HP100_PDL_USE3, MODECTRL1); /* BM engine read maximum */
 956                 hp100_andb(~HP100_TX_DUALQ, MODECTRL1); /* No Queue for Priority TX */
 957 
 958                 /* PCI Bus failures should result in a Misc. Interrupt */
 959                 hp100_orb(HP100_EN_BUS_FAIL, MODECTRL2);
 960 
 961                 hp100_outw(HP100_BM_READ | HP100_BM_WRITE | HP100_SET_HB, OPTION_LSW);
 962                 hp100_page(HW_MAP);
 963                 /* Use Burst Mode and switch on PAGE_CK */
 964                 hp100_orb(HP100_BM_BURST_RD | HP100_BM_BURST_WR, BM);
 965                 if ((lp->chip == HP100_CHIPID_RAINIER) || (lp->chip == HP100_CHIPID_SHASTA))
 966                         hp100_orb(HP100_BM_PAGE_CK, BM);
 967                 hp100_orb(HP100_BM_MASTER, BM);
 968         } else {                /* not busmaster */
 969 
 970                 hp100_page(HW_MAP);
 971                 hp100_andb(~HP100_BM_MASTER, BM);
 972         }
 973 
 974         /*
 975          * Divide card memory into regions for Rx, Tx and, if non-ETR chip, PDLs
 976          */
 977         hp100_page(MMU_CFG);
 978         if (lp->mode == 1) {    /* only needed for Busmaster */
 979                 int xmit_stop, recv_stop;
 980 
 981                 if ((lp->chip == HP100_CHIPID_RAINIER) ||
 982                     (lp->chip == HP100_CHIPID_SHASTA)) {
 983                         int pdl_stop;
 984 
 985                         /*
 986                          * Each pdl is 508 bytes long. (63 frags * 4 bytes for address and
 987                          * 4 bytes for header). We will leave NUM_RXPDLS * 508 (rounded
 988                          * to the next higher 1k boundary) bytes for the rx-pdl's
 989                          * Note: For non-etr chips the transmit stop register must be
 990                          * programmed on a 1k boundary, i.e. bits 9:0 must be zero.
 991                          */
 992                         pdl_stop = lp->memory_size;
 993                         xmit_stop = (pdl_stop - 508 * (MAX_RX_PDL) - 16) & ~(0x03ff);
 994                         recv_stop = (xmit_stop * (lp->rx_ratio) / 100) & ~(0x03ff);
 995                         hp100_outw((pdl_stop >> 4) - 1, PDL_MEM_STOP);
 996 #ifdef HP100_DEBUG_BM
 997                         printk("hp100: %s: PDL_STOP = 0x%x\n", dev->name, pdl_stop);
 998 #endif
 999                 } else {
1000                         /* ETR chip (Lassen) in busmaster mode */
1001                         xmit_stop = (lp->memory_size) - 1;
1002                         recv_stop = ((lp->memory_size * lp->rx_ratio) / 100) & ~(0x03ff);
1003                 }
1004 
1005                 hp100_outw(xmit_stop >> 4, TX_MEM_STOP);
1006                 hp100_outw(recv_stop >> 4, RX_MEM_STOP);
1007 #ifdef HP100_DEBUG_BM
1008                 printk("hp100: %s: TX_STOP  = 0x%x\n", dev->name, xmit_stop >> 4);
1009                 printk("hp100: %s: RX_STOP  = 0x%x\n", dev->name, recv_stop >> 4);
1010 #endif
1011         } else {
1012                 /* Slave modes (memory mapped and programmed io)  */
1013                 hp100_outw((((lp->memory_size * lp->rx_ratio) / 100) >> 4), RX_MEM_STOP);
1014                 hp100_outw(((lp->memory_size - 1) >> 4), TX_MEM_STOP);
1015 #ifdef HP100_DEBUG
1016                 printk("hp100: %s: TX_MEM_STOP: 0x%x\n", dev->name, hp100_inw(TX_MEM_STOP));
1017                 printk("hp100: %s: RX_MEM_STOP: 0x%x\n", dev->name, hp100_inw(RX_MEM_STOP));
1018 #endif
1019         }
1020 
1021         /* Write MAC address into page 1 */
1022         hp100_page(MAC_ADDRESS);
1023         for (i = 0; i < 6; i++)
1024                 hp100_outb(dev->dev_addr[i], MAC_ADDR + i);
1025 
1026         /* Zero the multicast hash registers */
1027         for (i = 0; i < 8; i++)
1028                 hp100_outb(0x0, HASH_BYTE0 + i);
1029 
1030         /* Set up MAC defaults */
1031         hp100_page(MAC_CTRL);
1032 
1033         /* Go to LAN Page and zero all filter bits */
1034         /* Zero accept error, accept multicast, accept broadcast and accept */
1035         /* all directed packet bits */
1036         hp100_andb(~(HP100_RX_EN |
1037                      HP100_TX_EN |
1038                      HP100_ACC_ERRORED |
1039                      HP100_ACC_MC |
1040                      HP100_ACC_BC | HP100_ACC_PHY), MAC_CFG_1);
1041 
1042         hp100_outb(0x00, MAC_CFG_2);
1043 
1044         /* Zero the frame format bit. This works around a training bug in the */
1045         /* new hubs. */
1046         hp100_outb(0x00, VG_LAN_CFG_2); /* (use 802.3) */
1047 
1048         if (lp->priority_tx)
1049                 hp100_outb(HP100_PRIORITY_TX | HP100_SET_LB, OPTION_MSW);
1050         else
1051                 hp100_outb(HP100_PRIORITY_TX | HP100_RESET_LB, OPTION_MSW);
1052 
1053         hp100_outb(HP100_ADV_NXT_PKT |
1054                    HP100_TX_CMD | HP100_RESET_LB, OPTION_MSW);
1055 
1056         /* If busmaster, initialize the PDLs */
1057         if (lp->mode == 1)
1058                 hp100_init_pdls(dev);
1059 
1060         /* Go to performance page and initialize isr and imr registers */
1061         hp100_page(PERFORMANCE);
1062         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
1063         hp100_outw(0xffff, IRQ_STATUS); /* ack IRQ */
1064 }
1065 
1066 /*
1067  *  open/close functions
1068  */
1069 
1070 static int hp100_open(struct net_device *dev)
1071 {
1072         struct hp100_private *lp = netdev_priv(dev);
1073 #ifdef HP100_DEBUG_B
1074         int ioaddr = dev->base_addr;
1075 #endif
1076 
1077 #ifdef HP100_DEBUG_B
1078         hp100_outw(0x4204, TRACE);
1079         printk("hp100: %s: open\n", dev->name);
1080 #endif
1081 
1082         /* New: if bus is PCI or EISA, interrupts might be shared interrupts */
1083         if (request_irq(dev->irq, hp100_interrupt,
1084                         lp->bus == HP100_BUS_PCI || lp->bus ==
1085                         HP100_BUS_EISA ? IRQF_SHARED : 0,
1086                         dev->name, dev)) {
1087                 printk("hp100: %s: unable to get IRQ %d\n", dev->name, dev->irq);
1088                 return -EAGAIN;
1089         }
1090 
1091         netif_trans_update(dev); /* prevent tx timeout */
1092         netif_start_queue(dev);
1093 
1094         lp->lan_type = hp100_sense_lan(dev);
1095         lp->mac1_mode = HP100_MAC1MODE3;
1096         lp->mac2_mode = HP100_MAC2MODE3;
1097         memset(&lp->hash_bytes, 0x00, 8);
1098 
1099         hp100_stop_interface(dev);
1100 
1101         hp100_hwinit(dev);
1102 
1103         hp100_start_interface(dev);     /* sets mac modes, enables interrupts */
1104 
1105         return 0;
1106 }
1107 
1108 /* The close function is called when the interface is to be brought down */
1109 static int hp100_close(struct net_device *dev)
1110 {
1111         int ioaddr = dev->base_addr;
1112         struct hp100_private *lp = netdev_priv(dev);
1113 
1114 #ifdef HP100_DEBUG_B
1115         hp100_outw(0x4205, TRACE);
1116         printk("hp100: %s: close\n", dev->name);
1117 #endif
1118 
1119         hp100_page(PERFORMANCE);
1120         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all IRQs */
1121 
1122         hp100_stop_interface(dev);
1123 
1124         if (lp->lan_type == HP100_LAN_100)
1125                 lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1126 
1127         netif_stop_queue(dev);
1128 
1129         free_irq(dev->irq, dev);
1130 
1131 #ifdef HP100_DEBUG
1132         printk("hp100: %s: close LSW = 0x%x\n", dev->name,
1133                hp100_inw(OPTION_LSW));
1134 #endif
1135 
1136         return 0;
1137 }
1138 
1139 
1140 /*
1141  * Configure the PDL Rx rings and LAN
1142  */
1143 static void hp100_init_pdls(struct net_device *dev)
1144 {
1145         struct hp100_private *lp = netdev_priv(dev);
1146         hp100_ring_t *ringptr;
1147         u_int *pageptr;         /* Warning : increment by 4 - Jean II */
1148         int i;
1149 
1150 #ifdef HP100_DEBUG_B
1151         int ioaddr = dev->base_addr;
1152 #endif
1153 
1154 #ifdef HP100_DEBUG_B
1155         hp100_outw(0x4206, TRACE);
1156         printk("hp100: %s: init pdls\n", dev->name);
1157 #endif
1158 
1159         if (!lp->page_vaddr_algn)
1160                 printk("hp100: %s: Warning: lp->page_vaddr_algn not initialised!\n", dev->name);
1161         else {
1162                 /* pageptr shall point into the DMA accessible memory region  */
1163                 /* we use this pointer to status the upper limit of allocated */
1164                 /* memory in the allocated page. */
1165                 /* note: align the pointers to the pci cache line size */
1166                 memset(lp->page_vaddr_algn, 0, MAX_RINGSIZE);   /* Zero  Rx/Tx ring page */
1167                 pageptr = lp->page_vaddr_algn;
1168 
1169                 lp->rxrcommit = 0;
1170                 ringptr = lp->rxrhead = lp->rxrtail = &(lp->rxring[0]);
1171 
1172                 /* Initialise Rx Ring */
1173                 for (i = MAX_RX_PDL - 1; i >= 0; i--) {
1174                         lp->rxring[i].next = ringptr;
1175                         ringptr = &(lp->rxring[i]);
1176                         pageptr += hp100_init_rxpdl(dev, ringptr, pageptr);
1177                 }
1178 
1179                 /* Initialise Tx Ring */
1180                 lp->txrcommit = 0;
1181                 ringptr = lp->txrhead = lp->txrtail = &(lp->txring[0]);
1182                 for (i = MAX_TX_PDL - 1; i >= 0; i--) {
1183                         lp->txring[i].next = ringptr;
1184                         ringptr = &(lp->txring[i]);
1185                         pageptr += hp100_init_txpdl(dev, ringptr, pageptr);
1186                 }
1187         }
1188 }
1189 
1190 
1191 /* These functions "format" the entries in the pdl structure   */
1192 /* They return how much memory the fragments need.            */
1193 static int hp100_init_rxpdl(struct net_device *dev,
1194                             register hp100_ring_t * ringptr,
1195                             register u32 * pdlptr)
1196 {
1197         /* pdlptr is starting address for this pdl */
1198 
1199         if (0 != (((unsigned long) pdlptr) & 0xf))
1200                 printk("hp100: %s: Init rxpdl: Unaligned pdlptr 0x%lx.\n",
1201                        dev->name, (unsigned long) pdlptr);
1202 
1203         ringptr->pdl = pdlptr + 1;
1204         ringptr->pdl_paddr = virt_to_whatever(dev, pdlptr + 1);
1205         ringptr->skb = NULL;
1206 
1207         /*
1208          * Write address and length of first PDL Fragment (which is used for
1209          * storing the RX-Header
1210          * We use the 4 bytes _before_ the PDH in the pdl memory area to
1211          * store this information. (PDH is at offset 0x04)
1212          */
1213         /* Note that pdlptr+1 and not pdlptr is the pointer to the PDH */
1214 
1215         *(pdlptr + 2) = (u_int) virt_to_whatever(dev, pdlptr);  /* Address Frag 1 */
1216         *(pdlptr + 3) = 4;      /* Length  Frag 1 */
1217 
1218         return roundup(MAX_RX_FRAG * 2 + 2, 4);
1219 }
1220 
1221 
1222 static int hp100_init_txpdl(struct net_device *dev,
1223                             register hp100_ring_t * ringptr,
1224                             register u32 * pdlptr)
1225 {
1226         if (0 != (((unsigned long) pdlptr) & 0xf))
1227                 printk("hp100: %s: Init txpdl: Unaligned pdlptr 0x%lx.\n", dev->name, (unsigned long) pdlptr);
1228 
1229         ringptr->pdl = pdlptr;  /* +1; */
1230         ringptr->pdl_paddr = virt_to_whatever(dev, pdlptr);     /* +1 */
1231         ringptr->skb = NULL;
1232 
1233         return roundup(MAX_TX_FRAG * 2 + 2, 4);
1234 }
1235 
1236 /*
1237  * hp100_build_rx_pdl allocates an skb_buff of maximum size plus two bytes
1238  * for possible odd word alignment rounding up to next dword and set PDL
1239  * address for fragment#2
1240  * Returns: 0 if unable to allocate skb_buff
1241  *          1 if successful
1242  */
1243 static int hp100_build_rx_pdl(hp100_ring_t * ringptr,
1244                               struct net_device *dev)
1245 {
1246 #ifdef HP100_DEBUG_B
1247         int ioaddr = dev->base_addr;
1248 #endif
1249 #ifdef HP100_DEBUG_BM
1250         u_int *p;
1251 #endif
1252 
1253 #ifdef HP100_DEBUG_B
1254         hp100_outw(0x4207, TRACE);
1255         printk("hp100: %s: build rx pdl\n", dev->name);
1256 #endif
1257 
1258         /* Allocate skb buffer of maximum size */
1259         /* Note: This depends on the alloc_skb functions allocating more
1260          * space than requested, i.e. aligning to 16bytes */
1261 
1262         ringptr->skb = netdev_alloc_skb(dev, roundup(MAX_ETHER_SIZE + 2, 4));
1263 
1264         if (NULL != ringptr->skb) {
1265                 /*
1266                  * Reserve 2 bytes at the head of the buffer to land the IP header
1267                  * on a long word boundary (According to the Network Driver section
1268                  * in the Linux KHG, this should help to increase performance.)
1269                  */
1270                 skb_reserve(ringptr->skb, 2);
1271 
1272                 ringptr->skb->data = skb_put(ringptr->skb, MAX_ETHER_SIZE);
1273 
1274                 /* ringptr->pdl points to the beginning of the PDL, i.e. the PDH */
1275                 /* Note: 1st Fragment is used for the 4 byte packet status
1276                  * (receive header). Its PDL entries are set up by init_rxpdl. So
1277                  * here we only have to set up the PDL fragment entries for the data
1278                  * part. Those 4 bytes will be stored in the DMA memory region
1279                  * directly before the PDL.
1280                  */
1281 #ifdef HP100_DEBUG_BM
1282                 printk("hp100: %s: build_rx_pdl: PDH@0x%x, skb->data (len %d) at 0x%x\n",
1283                                      dev->name, (u_int) ringptr->pdl,
1284                                      roundup(MAX_ETHER_SIZE + 2, 4),
1285                                      (unsigned int) ringptr->skb->data);
1286 #endif
1287 
1288                 /* Conversion to new PCI API : map skbuf data to PCI bus.
1289                  * Doc says it's OK for EISA as well - Jean II */
1290                 ringptr->pdl[0] = 0x00020000;   /* Write PDH */
1291                 ringptr->pdl[3] = pdl_map_data(netdev_priv(dev),
1292                                                ringptr->skb->data);
1293                 ringptr->pdl[4] = MAX_ETHER_SIZE;       /* Length of Data */
1294 
1295 #ifdef HP100_DEBUG_BM
1296                 for (p = (ringptr->pdl); p < (ringptr->pdl + 5); p++)
1297                         printk("hp100: %s: Adr 0x%.8x = 0x%.8x\n", dev->name, (u_int) p, (u_int) * p);
1298 #endif
1299                 return 1;
1300         }
1301         /* else: */
1302         /* alloc_skb failed (no memory) -> still can receive the header
1303          * fragment into PDL memory. make PDL safe by clearing msgptr and
1304          * making the PDL only 1 fragment (i.e. the 4 byte packet status)
1305          */
1306 #ifdef HP100_DEBUG_BM
1307         printk("hp100: %s: build_rx_pdl: PDH@0x%x, No space for skb.\n", dev->name, (u_int) ringptr->pdl);
1308 #endif
1309 
1310         ringptr->pdl[0] = 0x00010000;   /* PDH: Count=1 Fragment */
1311 
1312         return 0;
1313 }
1314 
1315 /*
1316  *  hp100_rxfill - attempt to fill the Rx Ring will empty skb's
1317  *
1318  * Makes assumption that skb's are always contiguous memory areas and
1319  * therefore PDLs contain only 2 physical fragments.
1320  * -  While the number of Rx PDLs with buffers is less than maximum
1321  *      a.  Get a maximum packet size skb
1322  *      b.  Put the physical address of the buffer into the PDL.
1323  *      c.  Output physical address of PDL to adapter.
1324  */
1325 static void hp100_rxfill(struct net_device *dev)
1326 {
1327         int ioaddr = dev->base_addr;
1328 
1329         struct hp100_private *lp = netdev_priv(dev);
1330         hp100_ring_t *ringptr;
1331 
1332 #ifdef HP100_DEBUG_B
1333         hp100_outw(0x4208, TRACE);
1334         printk("hp100: %s: rxfill\n", dev->name);
1335 #endif
1336 
1337         hp100_page(PERFORMANCE);
1338 
1339         while (lp->rxrcommit < MAX_RX_PDL) {
1340                 /*
1341                    ** Attempt to get a buffer and build a Rx PDL.
1342                  */
1343                 ringptr = lp->rxrtail;
1344                 if (0 == hp100_build_rx_pdl(ringptr, dev)) {
1345                         return; /* None available, return */
1346                 }
1347 
1348                 /* Hand this PDL over to the card */
1349                 /* Note: This needs performance page selected! */
1350 #ifdef HP100_DEBUG_BM
1351                 printk("hp100: %s: rxfill: Hand to card: pdl #%d @0x%x phys:0x%x, buffer: 0x%x\n",
1352                                      dev->name, lp->rxrcommit, (u_int) ringptr->pdl,
1353                                      (u_int) ringptr->pdl_paddr, (u_int) ringptr->pdl[3]);
1354 #endif
1355 
1356                 hp100_outl((u32) ringptr->pdl_paddr, RX_PDA);
1357 
1358                 lp->rxrcommit += 1;
1359                 lp->rxrtail = ringptr->next;
1360         }
1361 }
1362 
1363 /*
1364  * BM_shutdown - shutdown bus mastering and leave chip in reset state
1365  */
1366 
1367 static void hp100_BM_shutdown(struct net_device *dev)
1368 {
1369         int ioaddr = dev->base_addr;
1370         struct hp100_private *lp = netdev_priv(dev);
1371         unsigned long time;
1372 
1373 #ifdef HP100_DEBUG_B
1374         hp100_outw(0x4209, TRACE);
1375         printk("hp100: %s: bm shutdown\n", dev->name);
1376 #endif
1377 
1378         hp100_page(PERFORMANCE);
1379         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
1380         hp100_outw(0xffff, IRQ_STATUS); /* Ack all ints */
1381 
1382         /* Ensure Interrupts are off */
1383         hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
1384 
1385         /* Disable all MAC activity */
1386         hp100_page(MAC_CTRL);
1387         hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);    /* stop rx/tx */
1388 
1389         /* If cascade MMU is not already in reset */
1390         if (0 != (hp100_inw(OPTION_LSW) & HP100_HW_RST)) {
1391                 /* Wait 1.3ms (10Mb max packet time) to ensure MAC is idle so
1392                  * MMU pointers will not be reset out from underneath
1393                  */
1394                 hp100_page(MAC_CTRL);
1395                 for (time = 0; time < 5000; time++) {
1396                         if ((hp100_inb(MAC_CFG_1) & (HP100_TX_IDLE | HP100_RX_IDLE)) == (HP100_TX_IDLE | HP100_RX_IDLE))
1397                                 break;
1398                 }
1399 
1400                 /* Shutdown algorithm depends on the generation of Cascade */
1401                 if (lp->chip == HP100_CHIPID_LASSEN) {  /* ETR shutdown/reset */
1402                         /* Disable Busmaster mode and wait for bit to go to zero. */
1403                         hp100_page(HW_MAP);
1404                         hp100_andb(~HP100_BM_MASTER, BM);
1405                         /* 100 ms timeout */
1406                         for (time = 0; time < 32000; time++) {
1407                                 if (0 == (hp100_inb(BM) & HP100_BM_MASTER))
1408                                         break;
1409                         }
1410                 } else {        /* Shasta or Rainier Shutdown/Reset */
1411                         /* To ensure all bus master inloading activity has ceased,
1412                          * wait for no Rx PDAs or no Rx packets on card.
1413                          */
1414                         hp100_page(PERFORMANCE);
1415                         /* 100 ms timeout */
1416                         for (time = 0; time < 10000; time++) {
1417                                 /* RX_PDL: PDLs not executed. */
1418                                 /* RX_PKT_CNT: RX'd packets on card. */
1419                                 if ((hp100_inb(RX_PDL) == 0) && (hp100_inb(RX_PKT_CNT) == 0))
1420                                         break;
1421                         }
1422 
1423                         if (time >= 10000)
1424                                 printk("hp100: %s: BM shutdown error.\n", dev->name);
1425 
1426                         /* To ensure all bus master outloading activity has ceased,
1427                          * wait until the Tx PDA count goes to zero or no more Tx space
1428                          * available in the Tx region of the card.
1429                          */
1430                         /* 100 ms timeout */
1431                         for (time = 0; time < 10000; time++) {
1432                                 if ((0 == hp100_inb(TX_PKT_CNT)) &&
1433                                     (0 != (hp100_inb(TX_MEM_FREE) & HP100_AUTO_COMPARE)))
1434                                         break;
1435                         }
1436 
1437                         /* Disable Busmaster mode */
1438                         hp100_page(HW_MAP);
1439                         hp100_andb(~HP100_BM_MASTER, BM);
1440                 }       /* end of shutdown procedure for non-etr parts */
1441 
1442                 hp100_cascade_reset(dev, 1);
1443         }
1444         hp100_page(PERFORMANCE);
1445         /* hp100_outw( HP100_BM_READ | HP100_BM_WRITE | HP100_RESET_HB, OPTION_LSW ); */
1446         /* Busmaster mode should be shut down now. */
1447 }
1448 
1449 static int hp100_check_lan(struct net_device *dev)
1450 {
1451         struct hp100_private *lp = netdev_priv(dev);
1452 
1453         if (lp->lan_type < 0) { /* no LAN type detected yet? */
1454                 hp100_stop_interface(dev);
1455                 if ((lp->lan_type = hp100_sense_lan(dev)) < 0) {
1456                         printk("hp100: %s: no connection found - check wire\n", dev->name);
1457                         hp100_start_interface(dev);     /* 10Mb/s RX packets maybe handled */
1458                         return -EIO;
1459                 }
1460                 if (lp->lan_type == HP100_LAN_100)
1461                         lp->hub_status = hp100_login_to_vg_hub(dev, 0); /* relogin */
1462                 hp100_start_interface(dev);
1463         }
1464         return 0;
1465 }
1466 
1467 /*
1468  *  transmit functions
1469  */
1470 
1471 /* tx function for busmaster mode */
1472 static netdev_tx_t hp100_start_xmit_bm(struct sk_buff *skb,
1473                                        struct net_device *dev)
1474 {
1475         unsigned long flags;
1476         int i, ok_flag;
1477         int ioaddr = dev->base_addr;
1478         struct hp100_private *lp = netdev_priv(dev);
1479         hp100_ring_t *ringptr;
1480 
1481 #ifdef HP100_DEBUG_B
1482         hp100_outw(0x4210, TRACE);
1483         printk("hp100: %s: start_xmit_bm\n", dev->name);
1484 #endif
1485         if (skb->len <= 0)
1486                 goto drop;
1487 
1488         if (lp->chip == HP100_CHIPID_SHASTA && skb_padto(skb, ETH_ZLEN))
1489                 return NETDEV_TX_OK;
1490 
1491         /* Get Tx ring tail pointer */
1492         if (lp->txrtail->next == lp->txrhead) {
1493                 /* No memory. */
1494 #ifdef HP100_DEBUG
1495                 printk("hp100: %s: start_xmit_bm: No TX PDL available.\n", dev->name);
1496 #endif
1497                 /* not waited long enough since last tx? */
1498                 if (time_before(jiffies, dev_trans_start(dev) + HZ))
1499                         goto drop;
1500 
1501                 if (hp100_check_lan(dev))
1502                         goto drop;
1503 
1504                 if (lp->lan_type == HP100_LAN_100 && lp->hub_status < 0) {
1505                         /* we have a 100Mb/s adapter but it isn't connected to hub */
1506                         printk("hp100: %s: login to 100Mb/s hub retry\n", dev->name);
1507                         hp100_stop_interface(dev);
1508                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1509                         hp100_start_interface(dev);
1510                 } else {
1511                         spin_lock_irqsave(&lp->lock, flags);
1512                         hp100_ints_off();       /* Useful ? Jean II */
1513                         i = hp100_sense_lan(dev);
1514                         hp100_ints_on();
1515                         spin_unlock_irqrestore(&lp->lock, flags);
1516                         if (i == HP100_LAN_ERR)
1517                                 printk("hp100: %s: link down detected\n", dev->name);
1518                         else if (lp->lan_type != i) {   /* cable change! */
1519                                 /* it's very hard - all network settings must be changed!!! */
1520                                 printk("hp100: %s: cable change 10Mb/s <-> 100Mb/s detected\n", dev->name);
1521                                 lp->lan_type = i;
1522                                 hp100_stop_interface(dev);
1523                                 if (lp->lan_type == HP100_LAN_100)
1524                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1525                                 hp100_start_interface(dev);
1526                         } else {
1527                                 printk("hp100: %s: interface reset\n", dev->name);
1528                                 hp100_stop_interface(dev);
1529                                 if (lp->lan_type == HP100_LAN_100)
1530                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1531                                 hp100_start_interface(dev);
1532                         }
1533                 }
1534 
1535                 goto drop;
1536         }
1537 
1538         /*
1539          * we have to turn int's off before modifying this, otherwise
1540          * a tx_pdl_cleanup could occur at the same time
1541          */
1542         spin_lock_irqsave(&lp->lock, flags);
1543         ringptr = lp->txrtail;
1544         lp->txrtail = ringptr->next;
1545 
1546         /* Check whether packet has minimal packet size */
1547         ok_flag = skb->len >= HP100_MIN_PACKET_SIZE;
1548         i = ok_flag ? skb->len : HP100_MIN_PACKET_SIZE;
1549 
1550         ringptr->skb = skb;
1551         ringptr->pdl[0] = ((1 << 16) | i);      /* PDH: 1 Fragment & length */
1552         if (lp->chip == HP100_CHIPID_SHASTA) {
1553                 /* TODO:Could someone who has the EISA card please check if this works? */
1554                 ringptr->pdl[2] = i;
1555         } else {                /* Lassen */
1556                 /* In the PDL, don't use the padded size but the real packet size: */
1557                 ringptr->pdl[2] = skb->len;     /* 1st Frag: Length of frag */
1558         }
1559         /* Conversion to new PCI API : map skbuf data to PCI bus.
1560          * Doc says it's OK for EISA as well - Jean II */
1561         ringptr->pdl[1] = ((u32) pci_map_single(lp->pci_dev, skb->data, ringptr->pdl[2], PCI_DMA_TODEVICE));    /* 1st Frag: Adr. of data */
1562 
1563         /* Hand this PDL to the card. */
1564         hp100_outl(ringptr->pdl_paddr, TX_PDA_L);       /* Low Prio. Queue */
1565 
1566         lp->txrcommit++;
1567 
1568         dev->stats.tx_packets++;
1569         dev->stats.tx_bytes += skb->len;
1570 
1571         spin_unlock_irqrestore(&lp->lock, flags);
1572 
1573         return NETDEV_TX_OK;
1574 
1575 drop:
1576         dev_kfree_skb(skb);
1577         return NETDEV_TX_OK;
1578 }
1579 
1580 
1581 /* clean_txring checks if packets have been sent by the card by reading
1582  * the TX_PDL register from the performance page and comparing it to the
1583  * number of committed packets. It then frees the skb's of the packets that
1584  * obviously have been sent to the network.
1585  *
1586  * Needs the PERFORMANCE page selected.
1587  */
1588 static void hp100_clean_txring(struct net_device *dev)
1589 {
1590         struct hp100_private *lp = netdev_priv(dev);
1591         int ioaddr = dev->base_addr;
1592         int donecount;
1593 
1594 #ifdef HP100_DEBUG_B
1595         hp100_outw(0x4211, TRACE);
1596         printk("hp100: %s: clean txring\n", dev->name);
1597 #endif
1598 
1599         /* How many PDLs have been transmitted? */
1600         donecount = (lp->txrcommit) - hp100_inb(TX_PDL);
1601 
1602 #ifdef HP100_DEBUG
1603         if (donecount > MAX_TX_PDL)
1604                 printk("hp100: %s: Warning: More PDLs transmitted than committed to card???\n", dev->name);
1605 #endif
1606 
1607         for (; 0 != donecount; donecount--) {
1608 #ifdef HP100_DEBUG_BM
1609                 printk("hp100: %s: Free skb: data @0x%.8x txrcommit=0x%x TXPDL=0x%x, done=0x%x\n",
1610                                 dev->name, (u_int) lp->txrhead->skb->data,
1611                                 lp->txrcommit, hp100_inb(TX_PDL), donecount);
1612 #endif
1613                 /* Conversion to new PCI API : NOP */
1614                 pci_unmap_single(lp->pci_dev, (dma_addr_t) lp->txrhead->pdl[1], lp->txrhead->pdl[2], PCI_DMA_TODEVICE);
1615                 dev_consume_skb_any(lp->txrhead->skb);
1616                 lp->txrhead->skb = NULL;
1617                 lp->txrhead = lp->txrhead->next;
1618                 lp->txrcommit--;
1619         }
1620 }
1621 
1622 /* tx function for slave modes */
1623 static netdev_tx_t hp100_start_xmit(struct sk_buff *skb,
1624                                     struct net_device *dev)
1625 {
1626         unsigned long flags;
1627         int i, ok_flag;
1628         int ioaddr = dev->base_addr;
1629         u_short val;
1630         struct hp100_private *lp = netdev_priv(dev);
1631 
1632 #ifdef HP100_DEBUG_B
1633         hp100_outw(0x4212, TRACE);
1634         printk("hp100: %s: start_xmit\n", dev->name);
1635 #endif
1636         if (skb->len <= 0)
1637                 goto drop;
1638 
1639         if (hp100_check_lan(dev))
1640                 goto drop;
1641 
1642         /* If there is not enough free memory on the card... */
1643         i = hp100_inl(TX_MEM_FREE) & 0x7fffffff;
1644         if (!(((i / 2) - 539) > (skb->len + 16) && (hp100_inb(TX_PKT_CNT) < 255))) {
1645 #ifdef HP100_DEBUG
1646                 printk("hp100: %s: start_xmit: tx free mem = 0x%x\n", dev->name, i);
1647 #endif
1648                 /* not waited long enough since last failed tx try? */
1649                 if (time_before(jiffies, dev_trans_start(dev) + HZ)) {
1650 #ifdef HP100_DEBUG
1651                         printk("hp100: %s: trans_start timing problem\n",
1652                                dev->name);
1653 #endif
1654                         goto drop;
1655                 }
1656                 if (lp->lan_type == HP100_LAN_100 && lp->hub_status < 0) {
1657                         /* we have a 100Mb/s adapter but it isn't connected to hub */
1658                         printk("hp100: %s: login to 100Mb/s hub retry\n", dev->name);
1659                         hp100_stop_interface(dev);
1660                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1661                         hp100_start_interface(dev);
1662                 } else {
1663                         spin_lock_irqsave(&lp->lock, flags);
1664                         hp100_ints_off();       /* Useful ? Jean II */
1665                         i = hp100_sense_lan(dev);
1666                         hp100_ints_on();
1667                         spin_unlock_irqrestore(&lp->lock, flags);
1668                         if (i == HP100_LAN_ERR)
1669                                 printk("hp100: %s: link down detected\n", dev->name);
1670                         else if (lp->lan_type != i) {   /* cable change! */
1671                                 /* it's very hard - all network setting must be changed!!! */
1672                                 printk("hp100: %s: cable change 10Mb/s <-> 100Mb/s detected\n", dev->name);
1673                                 lp->lan_type = i;
1674                                 hp100_stop_interface(dev);
1675                                 if (lp->lan_type == HP100_LAN_100)
1676                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1677                                 hp100_start_interface(dev);
1678                         } else {
1679                                 printk("hp100: %s: interface reset\n", dev->name);
1680                                 hp100_stop_interface(dev);
1681                                 if (lp->lan_type == HP100_LAN_100)
1682                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1683                                 hp100_start_interface(dev);
1684                                 mdelay(1);
1685                         }
1686                 }
1687                 goto drop;
1688         }
1689 
1690         for (i = 0; i < 6000 && (hp100_inb(OPTION_MSW) & HP100_TX_CMD); i++) {
1691 #ifdef HP100_DEBUG_TX
1692                 printk("hp100: %s: start_xmit: busy\n", dev->name);
1693 #endif
1694         }
1695 
1696         spin_lock_irqsave(&lp->lock, flags);
1697         hp100_ints_off();
1698         val = hp100_inw(IRQ_STATUS);
1699         /* Ack / clear the interrupt TX_COMPLETE interrupt - this interrupt is set
1700          * when the current packet being transmitted on the wire is completed. */
1701         hp100_outw(HP100_TX_COMPLETE, IRQ_STATUS);
1702 #ifdef HP100_DEBUG_TX
1703         printk("hp100: %s: start_xmit: irq_status=0x%.4x, irqmask=0x%.4x, len=%d\n",
1704                         dev->name, val, hp100_inw(IRQ_MASK), (int) skb->len);
1705 #endif
1706 
1707         ok_flag = skb->len >= HP100_MIN_PACKET_SIZE;
1708         i = ok_flag ? skb->len : HP100_MIN_PACKET_SIZE;
1709 
1710         hp100_outw(i, DATA32);  /* tell card the total packet length */
1711         hp100_outw(i, FRAGMENT_LEN);    /* and first/only fragment length    */
1712 
1713         if (lp->mode == 2) {    /* memory mapped */
1714                 /* Note: The J2585B needs alignment to 32bits here!  */
1715                 memcpy_toio(lp->mem_ptr_virt, skb->data, (skb->len + 3) & ~3);
1716                 if (!ok_flag)
1717                         memset_io(lp->mem_ptr_virt, 0, HP100_MIN_PACKET_SIZE - skb->len);
1718         } else {                /* programmed i/o */
1719                 outsl(ioaddr + HP100_REG_DATA32, skb->data,
1720                       (skb->len + 3) >> 2);
1721                 if (!ok_flag)
1722                         for (i = (skb->len + 3) & ~3; i < HP100_MIN_PACKET_SIZE; i += 4)
1723                                 hp100_outl(0, DATA32);
1724         }
1725 
1726         hp100_outb(HP100_TX_CMD | HP100_SET_LB, OPTION_MSW);    /* send packet */
1727 
1728         dev->stats.tx_packets++;
1729         dev->stats.tx_bytes += skb->len;
1730         hp100_ints_on();
1731         spin_unlock_irqrestore(&lp->lock, flags);
1732 
1733         dev_consume_skb_any(skb);
1734 
1735 #ifdef HP100_DEBUG_TX
1736         printk("hp100: %s: start_xmit: end\n", dev->name);
1737 #endif
1738 
1739         return NETDEV_TX_OK;
1740 
1741 drop:
1742         dev_kfree_skb(skb);
1743         return NETDEV_TX_OK;
1744 
1745 }
1746 
1747 
1748 /*
1749  * Receive Function (Non-Busmaster mode)
1750  * Called when an "Receive Packet" interrupt occurs, i.e. the receive
1751  * packet counter is non-zero.
1752  * For non-busmaster, this function does the whole work of transferring
1753  * the packet to the host memory and then up to higher layers via skb
1754  * and netif_rx.
1755  */
1756 
1757 static void hp100_rx(struct net_device *dev)
1758 {
1759         int packets, pkt_len;
1760         int ioaddr = dev->base_addr;
1761         struct hp100_private *lp = netdev_priv(dev);
1762         u_int header;
1763         struct sk_buff *skb;
1764 
1765 #ifdef DEBUG_B
1766         hp100_outw(0x4213, TRACE);
1767         printk("hp100: %s: rx\n", dev->name);
1768 #endif
1769 
1770         /* First get indication of received lan packet */
1771         /* RX_PKT_CND indicates the number of packets which have been fully */
1772         /* received onto the card but have not been fully transferred of the card */
1773         packets = hp100_inb(RX_PKT_CNT);
1774 #ifdef HP100_DEBUG_RX
1775         if (packets > 1)
1776                 printk("hp100: %s: rx: waiting packets = %d\n", dev->name, packets);
1777 #endif
1778 
1779         while (packets-- > 0) {
1780                 /* If ADV_NXT_PKT is still set, we have to wait until the card has */
1781                 /* really advanced to the next packet. */
1782                 for (pkt_len = 0; pkt_len < 6000 && (hp100_inb(OPTION_MSW) & HP100_ADV_NXT_PKT); pkt_len++) {
1783 #ifdef HP100_DEBUG_RX
1784                         printk ("hp100: %s: rx: busy, remaining packets = %d\n", dev->name, packets);
1785 #endif
1786                 }
1787 
1788                 /* First we get the header, which contains information about the */
1789                 /* actual length of the received packet. */
1790                 if (lp->mode == 2) {    /* memory mapped mode */
1791                         header = readl(lp->mem_ptr_virt);
1792                 } else          /* programmed i/o */
1793                         header = hp100_inl(DATA32);
1794 
1795                 pkt_len = ((header & HP100_PKT_LEN_MASK) + 3) & ~3;
1796 
1797 #ifdef HP100_DEBUG_RX
1798                 printk("hp100: %s: rx: new packet - length=%d, errors=0x%x, dest=0x%x\n",
1799                                      dev->name, header & HP100_PKT_LEN_MASK,
1800                                      (header >> 16) & 0xfff8, (header >> 16) & 7);
1801 #endif
1802 
1803                 /* Now we allocate the skb and transfer the data into it. */
1804                 skb = netdev_alloc_skb(dev, pkt_len + 2);
1805                 if (skb == NULL) {      /* Not enough memory->drop packet */
1806 #ifdef HP100_DEBUG
1807                         printk("hp100: %s: rx: couldn't allocate a sk_buff of size %d\n",
1808                                              dev->name, pkt_len);
1809 #endif
1810                         dev->stats.rx_dropped++;
1811                 } else {        /* skb successfully allocated */
1812 
1813                         u_char *ptr;
1814 
1815                         skb_reserve(skb,2);
1816 
1817                         /* ptr to start of the sk_buff data area */
1818                         skb_put(skb, pkt_len);
1819                         ptr = skb->data;
1820 
1821                         /* Now transfer the data from the card into that area */
1822                         if (lp->mode == 2)
1823                                 memcpy_fromio(ptr, lp->mem_ptr_virt,pkt_len);
1824                         else    /* io mapped */
1825                                 insl(ioaddr + HP100_REG_DATA32, ptr, pkt_len >> 2);
1826 
1827                         skb->protocol = eth_type_trans(skb, dev);
1828 
1829 #ifdef HP100_DEBUG_RX
1830                         printk("hp100: %s: rx: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
1831                                         dev->name, ptr[0], ptr[1], ptr[2], ptr[3],
1832                                         ptr[4], ptr[5], ptr[6], ptr[7], ptr[8],
1833                                         ptr[9], ptr[10], ptr[11]);
1834 #endif
1835                         netif_rx(skb);
1836                         dev->stats.rx_packets++;
1837                         dev->stats.rx_bytes += pkt_len;
1838                 }
1839 
1840                 /* Indicate the card that we have got the packet */
1841                 hp100_outb(HP100_ADV_NXT_PKT | HP100_SET_LB, OPTION_MSW);
1842 
1843                 switch (header & 0x00070000) {
1844                 case (HP100_MULTI_ADDR_HASH << 16):
1845                 case (HP100_MULTI_ADDR_NO_HASH << 16):
1846                         dev->stats.multicast++;
1847                         break;
1848                 }
1849         }                       /* end of while(there are packets) loop */
1850 #ifdef HP100_DEBUG_RX
1851         printk("hp100_rx: %s: end\n", dev->name);
1852 #endif
1853 }
1854 
1855 /*
1856  * Receive Function for Busmaster Mode
1857  */
1858 static void hp100_rx_bm(struct net_device *dev)
1859 {
1860         int ioaddr = dev->base_addr;
1861         struct hp100_private *lp = netdev_priv(dev);
1862         hp100_ring_t *ptr;
1863         u_int header;
1864         int pkt_len;
1865 
1866 #ifdef HP100_DEBUG_B
1867         hp100_outw(0x4214, TRACE);
1868         printk("hp100: %s: rx_bm\n", dev->name);
1869 #endif
1870 
1871 #ifdef HP100_DEBUG
1872         if (0 == lp->rxrcommit) {
1873                 printk("hp100: %s: rx_bm called although no PDLs were committed to adapter?\n", dev->name);
1874                 return;
1875         } else
1876                 /* RX_PKT_CNT states how many PDLs are currently formatted and available to
1877                  * the cards BM engine */
1878         if ((hp100_inw(RX_PKT_CNT) & 0x00ff) >= lp->rxrcommit) {
1879                 printk("hp100: %s: More packets received than committed? RX_PKT_CNT=0x%x, commit=0x%x\n",
1880                                      dev->name, hp100_inw(RX_PKT_CNT) & 0x00ff,
1881                                      lp->rxrcommit);
1882                 return;
1883         }
1884 #endif
1885 
1886         while ((lp->rxrcommit > hp100_inb(RX_PDL))) {
1887                 /*
1888                  * The packet was received into the pdl pointed to by lp->rxrhead (
1889                  * the oldest pdl in the ring
1890                  */
1891 
1892                 /* First we get the header, which contains information about the */
1893                 /* actual length of the received packet. */
1894 
1895                 ptr = lp->rxrhead;
1896 
1897                 header = *(ptr->pdl - 1);
1898                 pkt_len = (header & HP100_PKT_LEN_MASK);
1899 
1900                 /* Conversion to new PCI API : NOP */
1901                 pci_unmap_single(lp->pci_dev, (dma_addr_t) ptr->pdl[3], MAX_ETHER_SIZE, PCI_DMA_FROMDEVICE);
1902 
1903 #ifdef HP100_DEBUG_BM
1904                 printk("hp100: %s: rx_bm: header@0x%x=0x%x length=%d, errors=0x%x, dest=0x%x\n",
1905                                 dev->name, (u_int) (ptr->pdl - 1), (u_int) header,
1906                                 pkt_len, (header >> 16) & 0xfff8, (header >> 16) & 7);
1907                 printk("hp100: %s: RX_PDL_COUNT:0x%x TX_PDL_COUNT:0x%x, RX_PKT_CNT=0x%x PDH=0x%x, Data@0x%x len=0x%x\n",
1908                                 dev->name, hp100_inb(RX_PDL), hp100_inb(TX_PDL),
1909                                 hp100_inb(RX_PKT_CNT), (u_int) * (ptr->pdl),
1910                                 (u_int) * (ptr->pdl + 3), (u_int) * (ptr->pdl + 4));
1911 #endif
1912 
1913                 if ((pkt_len >= MIN_ETHER_SIZE) &&
1914                     (pkt_len <= MAX_ETHER_SIZE)) {
1915                         if (ptr->skb == NULL) {
1916                                 printk("hp100: %s: rx_bm: skb null\n", dev->name);
1917                                 /* can happen if we only allocated room for the pdh due to memory shortage. */
1918                                 dev->stats.rx_dropped++;
1919                         } else {
1920                                 skb_trim(ptr->skb, pkt_len);    /* Shorten it */
1921                                 ptr->skb->protocol =
1922                                     eth_type_trans(ptr->skb, dev);
1923 
1924                                 netif_rx(ptr->skb);     /* Up and away... */
1925 
1926                                 dev->stats.rx_packets++;
1927                                 dev->stats.rx_bytes += pkt_len;
1928                         }
1929 
1930                         switch (header & 0x00070000) {
1931                         case (HP100_MULTI_ADDR_HASH << 16):
1932                         case (HP100_MULTI_ADDR_NO_HASH << 16):
1933                                 dev->stats.multicast++;
1934                                 break;
1935                         }
1936                 } else {
1937 #ifdef HP100_DEBUG
1938                         printk("hp100: %s: rx_bm: Received bad packet (length=%d)\n", dev->name, pkt_len);
1939 #endif
1940                         if (ptr->skb != NULL)
1941                                 dev_kfree_skb_any(ptr->skb);
1942                         dev->stats.rx_errors++;
1943                 }
1944 
1945                 lp->rxrhead = lp->rxrhead->next;
1946 
1947                 /* Allocate a new rx PDL (so lp->rxrcommit stays the same) */
1948                 if (0 == hp100_build_rx_pdl(lp->rxrtail, dev)) {
1949                         /* No space for skb, header can still be received. */
1950 #ifdef HP100_DEBUG
1951                         printk("hp100: %s: rx_bm: No space for new PDL.\n", dev->name);
1952 #endif
1953                         return;
1954                 } else {        /* successfully allocated new PDL - put it in ringlist at tail. */
1955                         hp100_outl((u32) lp->rxrtail->pdl_paddr, RX_PDA);
1956                         lp->rxrtail = lp->rxrtail->next;
1957                 }
1958 
1959         }
1960 }
1961 
1962 /*
1963  *  statistics
1964  */
1965 static struct net_device_stats *hp100_get_stats(struct net_device *dev)
1966 {
1967         unsigned long flags;
1968         int ioaddr = dev->base_addr;
1969         struct hp100_private *lp = netdev_priv(dev);
1970 
1971 #ifdef HP100_DEBUG_B
1972         hp100_outw(0x4215, TRACE);
1973 #endif
1974 
1975         spin_lock_irqsave(&lp->lock, flags);
1976         hp100_ints_off();       /* Useful ? Jean II */
1977         hp100_update_stats(dev);
1978         hp100_ints_on();
1979         spin_unlock_irqrestore(&lp->lock, flags);
1980         return &(dev->stats);
1981 }
1982 
1983 static void hp100_update_stats(struct net_device *dev)
1984 {
1985         int ioaddr = dev->base_addr;
1986         u_short val;
1987 
1988 #ifdef HP100_DEBUG_B
1989         hp100_outw(0x4216, TRACE);
1990         printk("hp100: %s: update-stats\n", dev->name);
1991 #endif
1992 
1993         /* Note: Statistics counters clear when read. */
1994         hp100_page(MAC_CTRL);
1995         val = hp100_inw(DROPPED) & 0x0fff;
1996         dev->stats.rx_errors += val;
1997         dev->stats.rx_over_errors += val;
1998         val = hp100_inb(CRC);
1999         dev->stats.rx_errors += val;
2000         dev->stats.rx_crc_errors += val;
2001         val = hp100_inb(ABORT);
2002         dev->stats.tx_errors += val;
2003         dev->stats.tx_aborted_errors += val;
2004         hp100_page(PERFORMANCE);
2005 }
2006 
2007 static void hp100_misc_interrupt(struct net_device *dev)
2008 {
2009 #ifdef HP100_DEBUG_B
2010         int ioaddr = dev->base_addr;
2011 #endif
2012 
2013 #ifdef HP100_DEBUG_B
2014         int ioaddr = dev->base_addr;
2015         hp100_outw(0x4216, TRACE);
2016         printk("hp100: %s: misc_interrupt\n", dev->name);
2017 #endif
2018 
2019         /* Note: Statistics counters clear when read. */
2020         dev->stats.rx_errors++;
2021         dev->stats.tx_errors++;
2022 }
2023 
2024 static void hp100_clear_stats(struct hp100_private *lp, int ioaddr)
2025 {
2026         unsigned long flags;
2027 
2028 #ifdef HP100_DEBUG_B
2029         hp100_outw(0x4217, TRACE);
2030         printk("hp100: %s: clear_stats\n", dev->name);
2031 #endif
2032 
2033         spin_lock_irqsave(&lp->lock, flags);
2034         hp100_page(MAC_CTRL);   /* get all statistics bytes */
2035         hp100_inw(DROPPED);
2036         hp100_inb(CRC);
2037         hp100_inb(ABORT);
2038         hp100_page(PERFORMANCE);
2039         spin_unlock_irqrestore(&lp->lock, flags);
2040 }
2041 
2042 
2043 /*
2044  *  multicast setup
2045  */
2046 
2047 /*
2048  *  Set or clear the multicast filter for this adapter.
2049  */
2050 
2051 static void hp100_set_multicast_list(struct net_device *dev)
2052 {
2053         unsigned long flags;
2054         int ioaddr = dev->base_addr;
2055         struct hp100_private *lp = netdev_priv(dev);
2056 
2057 #ifdef HP100_DEBUG_B
2058         hp100_outw(0x4218, TRACE);
2059         printk("hp100: %s: set_mc_list\n", dev->name);
2060 #endif
2061 
2062         spin_lock_irqsave(&lp->lock, flags);
2063         hp100_ints_off();
2064         hp100_page(MAC_CTRL);
2065         hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);    /* stop rx/tx */
2066 
2067         if (dev->flags & IFF_PROMISC) {
2068                 lp->mac2_mode = HP100_MAC2MODE6;        /* promiscuous mode = get all good */
2069                 lp->mac1_mode = HP100_MAC1MODE6;        /* packets on the net */
2070                 memset(&lp->hash_bytes, 0xff, 8);
2071         } else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI)) {
2072                 lp->mac2_mode = HP100_MAC2MODE5;        /* multicast mode = get packets for */
2073                 lp->mac1_mode = HP100_MAC1MODE5;        /* me, broadcasts and all multicasts */
2074 #ifdef HP100_MULTICAST_FILTER   /* doesn't work!!! */
2075                 if (dev->flags & IFF_ALLMULTI) {
2076                         /* set hash filter to receive all multicast packets */
2077                         memset(&lp->hash_bytes, 0xff, 8);
2078                 } else {
2079                         int i, idx;
2080                         u_char *addrs;
2081                         struct netdev_hw_addr *ha;
2082 
2083                         memset(&lp->hash_bytes, 0x00, 8);
2084 #ifdef HP100_DEBUG
2085                         printk("hp100: %s: computing hash filter - mc_count = %i\n",
2086                                dev->name, netdev_mc_count(dev));
2087 #endif
2088                         netdev_for_each_mc_addr(ha, dev) {
2089                                 addrs = ha->addr;
2090 #ifdef HP100_DEBUG
2091                                 printk("hp100: %s: multicast = %pM, ",
2092                                              dev->name, addrs);
2093 #endif
2094                                 for (i = idx = 0; i < 6; i++) {
2095                                         idx ^= *addrs++ & 0x3f;
2096                                         printk(":%02x:", idx);
2097                                 }
2098 #ifdef HP100_DEBUG
2099                                 printk("idx = %i\n", idx);
2100 #endif
2101                                 lp->hash_bytes[idx >> 3] |= (1 << (idx & 7));
2102                         }
2103                 }
2104 #else
2105                 memset(&lp->hash_bytes, 0xff, 8);
2106 #endif
2107         } else {
2108                 lp->mac2_mode = HP100_MAC2MODE3;        /* normal mode = get packets for me */
2109                 lp->mac1_mode = HP100_MAC1MODE3;        /* and broadcasts */
2110                 memset(&lp->hash_bytes, 0x00, 8);
2111         }
2112 
2113         if (((hp100_inb(MAC_CFG_1) & 0x0f) != lp->mac1_mode) ||
2114             (hp100_inb(MAC_CFG_2) != lp->mac2_mode)) {
2115                 int i;
2116 
2117                 hp100_outb(lp->mac2_mode, MAC_CFG_2);
2118                 hp100_andb(HP100_MAC1MODEMASK, MAC_CFG_1);      /* clear mac1 mode bits */
2119                 hp100_orb(lp->mac1_mode, MAC_CFG_1);    /* and set the new mode */
2120 
2121                 hp100_page(MAC_ADDRESS);
2122                 for (i = 0; i < 8; i++)
2123                         hp100_outb(lp->hash_bytes[i], HASH_BYTE0 + i);
2124 #ifdef HP100_DEBUG
2125                 printk("hp100: %s: mac1 = 0x%x, mac2 = 0x%x, multicast hash = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
2126                                      dev->name, lp->mac1_mode, lp->mac2_mode,
2127                                      lp->hash_bytes[0], lp->hash_bytes[1],
2128                                      lp->hash_bytes[2], lp->hash_bytes[3],
2129                                      lp->hash_bytes[4], lp->hash_bytes[5],
2130                                      lp->hash_bytes[6], lp->hash_bytes[7]);
2131 #endif
2132 
2133                 if (lp->lan_type == HP100_LAN_100) {
2134 #ifdef HP100_DEBUG
2135                         printk("hp100: %s: 100VG MAC settings have changed - relogin.\n", dev->name);
2136 #endif
2137                         lp->hub_status = hp100_login_to_vg_hub(dev, 1); /* force a relogin to the hub */
2138                 }
2139         } else {
2140                 int i;
2141                 u_char old_hash_bytes[8];
2142 
2143                 hp100_page(MAC_ADDRESS);
2144                 for (i = 0; i < 8; i++)
2145                         old_hash_bytes[i] = hp100_inb(HASH_BYTE0 + i);
2146                 if (memcmp(old_hash_bytes, &lp->hash_bytes, 8)) {
2147                         for (i = 0; i < 8; i++)
2148                                 hp100_outb(lp->hash_bytes[i], HASH_BYTE0 + i);
2149 #ifdef HP100_DEBUG
2150                         printk("hp100: %s: multicast hash = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
2151                                         dev->name, lp->hash_bytes[0],
2152                                         lp->hash_bytes[1], lp->hash_bytes[2],
2153                                         lp->hash_bytes[3], lp->hash_bytes[4],
2154                                         lp->hash_bytes[5], lp->hash_bytes[6],
2155                                         lp->hash_bytes[7]);
2156 #endif
2157 
2158                         if (lp->lan_type == HP100_LAN_100) {
2159 #ifdef HP100_DEBUG
2160                                 printk("hp100: %s: 100VG MAC settings have changed - relogin.\n", dev->name);
2161 #endif
2162                                 lp->hub_status = hp100_login_to_vg_hub(dev, 1); /* force a relogin to the hub */
2163                         }
2164                 }
2165         }
2166 
2167         hp100_page(MAC_CTRL);
2168         hp100_orb(HP100_RX_EN | HP100_RX_IDLE | /* enable rx */
2169                   HP100_TX_EN | HP100_TX_IDLE, MAC_CFG_1);      /* enable tx */
2170 
2171         hp100_page(PERFORMANCE);
2172         hp100_ints_on();
2173         spin_unlock_irqrestore(&lp->lock, flags);
2174 }
2175 
2176 /*
2177  *  hardware interrupt handling
2178  */
2179 
2180 static irqreturn_t hp100_interrupt(int irq, void *dev_id)
2181 {
2182         struct net_device *dev = (struct net_device *) dev_id;
2183         struct hp100_private *lp = netdev_priv(dev);
2184 
2185         int ioaddr;
2186         u_int val;
2187 
2188         if (dev == NULL)
2189                 return IRQ_NONE;
2190         ioaddr = dev->base_addr;
2191 
2192         spin_lock(&lp->lock);
2193 
2194         hp100_ints_off();
2195 
2196 #ifdef HP100_DEBUG_B
2197         hp100_outw(0x4219, TRACE);
2198 #endif
2199 
2200         /*  hp100_page( PERFORMANCE ); */
2201         val = hp100_inw(IRQ_STATUS);
2202 #ifdef HP100_DEBUG_IRQ
2203         printk("hp100: %s: mode=%x,IRQ_STAT=0x%.4x,RXPKTCNT=0x%.2x RXPDL=0x%.2x TXPKTCNT=0x%.2x TXPDL=0x%.2x\n",
2204                              dev->name, lp->mode, (u_int) val, hp100_inb(RX_PKT_CNT),
2205                              hp100_inb(RX_PDL), hp100_inb(TX_PKT_CNT), hp100_inb(TX_PDL));
2206 #endif
2207 
2208         if (val == 0) {         /* might be a shared interrupt */
2209                 spin_unlock(&lp->lock);
2210                 hp100_ints_on();
2211                 return IRQ_NONE;
2212         }
2213         /* We're only interested in those interrupts we really enabled. */
2214         /* val &= hp100_inw( IRQ_MASK ); */
2215 
2216         /*
2217          * RX_PDL_FILL_COMPL is set whenever a RX_PDL has been executed. A RX_PDL
2218          * is considered executed whenever the RX_PDL data structure is no longer
2219          * needed.
2220          */
2221         if (val & HP100_RX_PDL_FILL_COMPL) {
2222                 if (lp->mode == 1)
2223                         hp100_rx_bm(dev);
2224                 else {
2225                         printk("hp100: %s: rx_pdl_fill_compl interrupt although not busmaster?\n", dev->name);
2226                 }
2227         }
2228 
2229         /*
2230          * The RX_PACKET interrupt is set, when the receive packet counter is
2231          * non zero. We use this interrupt for receiving in slave mode. In
2232          * busmaster mode, we use it to make sure we did not miss any rx_pdl_fill
2233          * interrupts. If rx_pdl_fill_compl is not set and rx_packet is set, then
2234          * we somehow have missed a rx_pdl_fill_compl interrupt.
2235          */
2236 
2237         if (val & HP100_RX_PACKET) {    /* Receive Packet Counter is non zero */
2238                 if (lp->mode != 1)      /* non busmaster */
2239                         hp100_rx(dev);
2240                 else if (!(val & HP100_RX_PDL_FILL_COMPL)) {
2241                         /* Shouldn't happen - maybe we missed a RX_PDL_FILL Interrupt?  */
2242                         hp100_rx_bm(dev);
2243                 }
2244         }
2245 
2246         /*
2247          * Ack. that we have noticed the interrupt and thereby allow next one.
2248          * Note that this is now done after the slave rx function, since first
2249          * acknowledging and then setting ADV_NXT_PKT caused an extra interrupt
2250          * on the J2573.
2251          */
2252         hp100_outw(val, IRQ_STATUS);
2253 
2254         /*
2255          * RX_ERROR is set when a packet is dropped due to no memory resources on
2256          * the card or when a RCV_ERR occurs.
2257          * TX_ERROR is set when a TX_ABORT condition occurs in the MAC->exists
2258          * only in the 802.3 MAC and happens when 16 collisions occur during a TX
2259          */
2260         if (val & (HP100_TX_ERROR | HP100_RX_ERROR)) {
2261 #ifdef HP100_DEBUG_IRQ
2262                 printk("hp100: %s: TX/RX Error IRQ\n", dev->name);
2263 #endif
2264                 hp100_update_stats(dev);
2265                 if (lp->mode == 1) {
2266                         hp100_rxfill(dev);
2267                         hp100_clean_txring(dev);
2268                 }
2269         }
2270 
2271         /*
2272          * RX_PDA_ZERO is set when the PDA count goes from non-zero to zero.
2273          */
2274         if ((lp->mode == 1) && (val & (HP100_RX_PDA_ZERO)))
2275                 hp100_rxfill(dev);
2276 
2277         /*
2278          * HP100_TX_COMPLETE interrupt occurs when packet transmitted on wire
2279          * is completed
2280          */
2281         if ((lp->mode == 1) && (val & (HP100_TX_COMPLETE)))
2282                 hp100_clean_txring(dev);
2283 
2284         /*
2285          * MISC_ERROR is set when either the LAN link goes down or a detected
2286          * bus error occurs.
2287          */
2288         if (val & HP100_MISC_ERROR) {   /* New for J2585B */
2289 #ifdef HP100_DEBUG_IRQ
2290                 printk
2291                     ("hp100: %s: Misc. Error Interrupt - Check cabling.\n",
2292                      dev->name);
2293 #endif
2294                 if (lp->mode == 1) {
2295                         hp100_clean_txring(dev);
2296                         hp100_rxfill(dev);
2297                 }
2298                 hp100_misc_interrupt(dev);
2299         }
2300 
2301         spin_unlock(&lp->lock);
2302         hp100_ints_on();
2303         return IRQ_HANDLED;
2304 }
2305 
2306 /*
2307  *  some misc functions
2308  */
2309 
2310 static void hp100_start_interface(struct net_device *dev)
2311 {
2312         unsigned long flags;
2313         int ioaddr = dev->base_addr;
2314         struct hp100_private *lp = netdev_priv(dev);
2315 
2316 #ifdef HP100_DEBUG_B
2317         hp100_outw(0x4220, TRACE);
2318         printk("hp100: %s: hp100_start_interface\n", dev->name);
2319 #endif
2320 
2321         spin_lock_irqsave(&lp->lock, flags);
2322 
2323         /* Ensure the adapter does not want to request an interrupt when */
2324         /* enabling the IRQ line to be active on the bus (i.e. not tri-stated) */
2325         hp100_page(PERFORMANCE);
2326         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
2327         hp100_outw(0xffff, IRQ_STATUS); /* ack all IRQs */
2328         hp100_outw(HP100_FAKE_INT | HP100_INT_EN | HP100_RESET_LB,
2329                    OPTION_LSW);
2330         /* Un Tri-state int. TODO: Check if shared interrupts can be realised? */
2331         hp100_outw(HP100_TRI_INT | HP100_RESET_HB, OPTION_LSW);
2332 
2333         if (lp->mode == 1) {
2334                 /* Make sure BM bit is set... */
2335                 hp100_page(HW_MAP);
2336                 hp100_orb(HP100_BM_MASTER, BM);
2337                 hp100_rxfill(dev);
2338         } else if (lp->mode == 2) {
2339                 /* Enable memory mapping. Note: Don't do this when busmaster. */
2340                 hp100_outw(HP100_MMAP_DIS | HP100_RESET_HB, OPTION_LSW);
2341         }
2342 
2343         hp100_page(PERFORMANCE);
2344         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
2345         hp100_outw(0xffff, IRQ_STATUS); /* ack IRQ */
2346 
2347         /* enable a few interrupts: */
2348         if (lp->mode == 1) {    /* busmaster mode */
2349                 hp100_outw(HP100_RX_PDL_FILL_COMPL |
2350                            HP100_RX_PDA_ZERO | HP100_RX_ERROR |
2351                            /* HP100_RX_PACKET    | */
2352                            /* HP100_RX_EARLY_INT |  */ HP100_SET_HB |
2353                            /* HP100_TX_PDA_ZERO  |  */
2354                            HP100_TX_COMPLETE |
2355                            /* HP100_MISC_ERROR   |  */
2356                            HP100_TX_ERROR | HP100_SET_LB, IRQ_MASK);
2357         } else {
2358                 hp100_outw(HP100_RX_PACKET |
2359                            HP100_RX_ERROR | HP100_SET_HB |
2360                            HP100_TX_ERROR | HP100_SET_LB, IRQ_MASK);
2361         }
2362 
2363         /* Note : before hp100_set_multicast_list(), because it will play with
2364          * spinlock itself... Jean II */
2365         spin_unlock_irqrestore(&lp->lock, flags);
2366 
2367         /* Enable MAC Tx and RX, set MAC modes, ... */
2368         hp100_set_multicast_list(dev);
2369 }
2370 
2371 static void hp100_stop_interface(struct net_device *dev)
2372 {
2373         struct hp100_private *lp = netdev_priv(dev);
2374         int ioaddr = dev->base_addr;
2375         u_int val;
2376 
2377 #ifdef HP100_DEBUG_B
2378         printk("hp100: %s: hp100_stop_interface\n", dev->name);
2379         hp100_outw(0x4221, TRACE);
2380 #endif
2381 
2382         if (lp->mode == 1)
2383                 hp100_BM_shutdown(dev);
2384         else {
2385                 /* Note: MMAP_DIS will be reenabled by start_interface */
2386                 hp100_outw(HP100_INT_EN | HP100_RESET_LB |
2387                            HP100_TRI_INT | HP100_MMAP_DIS | HP100_SET_HB,
2388                            OPTION_LSW);
2389                 val = hp100_inw(OPTION_LSW);
2390 
2391                 hp100_page(MAC_CTRL);
2392                 hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);
2393 
2394                 if (!(val & HP100_HW_RST))
2395                         return; /* If reset, imm. return ... */
2396                 /* ... else: busy wait until idle */
2397                 for (val = 0; val < 6000; val++)
2398                         if ((hp100_inb(MAC_CFG_1) & (HP100_TX_IDLE | HP100_RX_IDLE)) == (HP100_TX_IDLE | HP100_RX_IDLE)) {
2399                                 hp100_page(PERFORMANCE);
2400                                 return;
2401                         }
2402                 printk("hp100: %s: hp100_stop_interface - timeout\n", dev->name);
2403                 hp100_page(PERFORMANCE);
2404         }
2405 }
2406 
2407 static void hp100_load_eeprom(struct net_device *dev, u_short probe_ioaddr)
2408 {
2409         int i;
2410         int ioaddr = probe_ioaddr > 0 ? probe_ioaddr : dev->base_addr;
2411 
2412 #ifdef HP100_DEBUG_B
2413         hp100_outw(0x4222, TRACE);
2414 #endif
2415 
2416         hp100_page(EEPROM_CTRL);
2417         hp100_andw(~HP100_EEPROM_LOAD, EEPROM_CTRL);
2418         hp100_orw(HP100_EEPROM_LOAD, EEPROM_CTRL);
2419         for (i = 0; i < 10000; i++)
2420                 if (!(hp100_inb(OPTION_MSW) & HP100_EE_LOAD))
2421                         return;
2422         printk("hp100: %s: hp100_load_eeprom - timeout\n", dev->name);
2423 }
2424 
2425 /*  Sense connection status.
2426  *  return values: LAN_10  - Connected to 10Mbit/s network
2427  *                 LAN_100 - Connected to 100Mbit/s network
2428  *                 LAN_ERR - not connected or 100Mbit/s Hub down
2429  */
2430 static int hp100_sense_lan(struct net_device *dev)
2431 {
2432         int ioaddr = dev->base_addr;
2433         u_short val_VG, val_10;
2434         struct hp100_private *lp = netdev_priv(dev);
2435 
2436 #ifdef HP100_DEBUG_B
2437         hp100_outw(0x4223, TRACE);
2438 #endif
2439 
2440         hp100_page(MAC_CTRL);
2441         val_10 = hp100_inb(10_LAN_CFG_1);
2442         val_VG = hp100_inb(VG_LAN_CFG_1);
2443         hp100_page(PERFORMANCE);
2444 #ifdef HP100_DEBUG
2445         printk("hp100: %s: sense_lan: val_VG = 0x%04x, val_10 = 0x%04x\n",
2446                dev->name, val_VG, val_10);
2447 #endif
2448 
2449         if (val_10 & HP100_LINK_BEAT_ST)        /* 10Mb connection is active */
2450                 return HP100_LAN_10;
2451 
2452         if (val_10 & HP100_AUI_ST) {    /* have we BNC or AUI onboard? */
2453                 /*
2454                  * This can be overriden by dos utility, so if this has no effect,
2455                  * perhaps you need to download that utility from HP and set card
2456                  * back to "auto detect".
2457                  */
2458                 val_10 |= HP100_AUI_SEL | HP100_LOW_TH;
2459                 hp100_page(MAC_CTRL);
2460                 hp100_outb(val_10, 10_LAN_CFG_1);
2461                 hp100_page(PERFORMANCE);
2462                 return HP100_LAN_COAX;
2463         }
2464 
2465         /* Those cards don't have a 100 Mbit connector */
2466         if ( !strcmp(lp->id, "HWP1920")  ||
2467              (lp->pci_dev &&
2468               lp->pci_dev->vendor == PCI_VENDOR_ID &&
2469               (lp->pci_dev->device == PCI_DEVICE_ID_HP_J2970A ||
2470                lp->pci_dev->device == PCI_DEVICE_ID_HP_J2973A)))
2471                 return HP100_LAN_ERR;
2472 
2473         if (val_VG & HP100_LINK_CABLE_ST)       /* Can hear the HUBs tone. */
2474                 return HP100_LAN_100;
2475         return HP100_LAN_ERR;
2476 }
2477 
2478 static int hp100_down_vg_link(struct net_device *dev)
2479 {
2480         struct hp100_private *lp = netdev_priv(dev);
2481         int ioaddr = dev->base_addr;
2482         unsigned long time;
2483         long savelan, newlan;
2484 
2485 #ifdef HP100_DEBUG_B
2486         hp100_outw(0x4224, TRACE);
2487         printk("hp100: %s: down_vg_link\n", dev->name);
2488 #endif
2489 
2490         hp100_page(MAC_CTRL);
2491         time = jiffies + (HZ / 4);
2492         do {
2493                 if (hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST)
2494                         break;
2495                 if (!in_interrupt())
2496                         schedule_timeout_interruptible(1);
2497         } while (time_after(time, jiffies));
2498 
2499         if (time_after_eq(jiffies, time))       /* no signal->no logout */
2500                 return 0;
2501 
2502         /* Drop the VG Link by clearing the link up cmd and load addr. */
2503 
2504         hp100_andb(~(HP100_LOAD_ADDR | HP100_LINK_CMD), VG_LAN_CFG_1);
2505         hp100_orb(HP100_VG_SEL, VG_LAN_CFG_1);
2506 
2507         /* Conditionally stall for >250ms on Link-Up Status (to go down) */
2508         time = jiffies + (HZ / 2);
2509         do {
2510                 if (!(hp100_inb(VG_LAN_CFG_1) & HP100_LINK_UP_ST))
2511                         break;
2512                 if (!in_interrupt())
2513                         schedule_timeout_interruptible(1);
2514         } while (time_after(time, jiffies));
2515 
2516 #ifdef HP100_DEBUG
2517         if (time_after_eq(jiffies, time))
2518                 printk("hp100: %s: down_vg_link: Link does not go down?\n", dev->name);
2519 #endif
2520 
2521         /* To prevent condition where Rev 1 VG MAC and old hubs do not complete */
2522         /* logout under traffic (even though all the status bits are cleared),  */
2523         /* do this workaround to get the Rev 1 MAC in its idle state */
2524         if (lp->chip == HP100_CHIPID_LASSEN) {
2525                 /* Reset VG MAC to insure it leaves the logoff state even if */
2526                 /* the Hub is still emitting tones */
2527                 hp100_andb(~HP100_VG_RESET, VG_LAN_CFG_1);
2528                 udelay(1500);   /* wait for >1ms */
2529                 hp100_orb(HP100_VG_RESET, VG_LAN_CFG_1);        /* Release Reset */
2530                 udelay(1500);
2531         }
2532 
2533         /* New: For lassen, switch to 10 Mbps mac briefly to clear training ACK */
2534         /* to get the VG mac to full reset. This is not req.d with later chips */
2535         /* Note: It will take the between 1 and 2 seconds for the VG mac to be */
2536         /* selected again! This will be left to the connect hub function to */
2537         /* perform if desired.  */
2538         if (lp->chip == HP100_CHIPID_LASSEN) {
2539                 /* Have to write to 10 and 100VG control registers simultaneously */
2540                 savelan = newlan = hp100_inl(10_LAN_CFG_1);     /* read 10+100 LAN_CFG regs */
2541                 newlan &= ~(HP100_VG_SEL << 16);
2542                 newlan |= (HP100_DOT3_MAC) << 8;
2543                 hp100_andb(~HP100_AUTO_MODE, MAC_CFG_3);        /* Autosel off */
2544                 hp100_outl(newlan, 10_LAN_CFG_1);
2545 
2546                 /* Conditionally stall for 5sec on VG selected. */
2547                 time = jiffies + (HZ * 5);
2548                 do {
2549                         if (!(hp100_inb(MAC_CFG_4) & HP100_MAC_SEL_ST))
2550                                 break;
2551                         if (!in_interrupt())
2552                                 schedule_timeout_interruptible(1);
2553                 } while (time_after(time, jiffies));
2554 
2555                 hp100_orb(HP100_AUTO_MODE, MAC_CFG_3);  /* Autosel back on */
2556                 hp100_outl(savelan, 10_LAN_CFG_1);
2557         }
2558 
2559         time = jiffies + (3 * HZ);      /* Timeout 3s */
2560         do {
2561                 if ((hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST) == 0)
2562                         break;
2563                 if (!in_interrupt())
2564                         schedule_timeout_interruptible(1);
2565         } while (time_after(time, jiffies));
2566 
2567         if (time_before_eq(time, jiffies)) {
2568 #ifdef HP100_DEBUG
2569                 printk("hp100: %s: down_vg_link: timeout\n", dev->name);
2570 #endif
2571                 return -EIO;
2572         }
2573 
2574         time = jiffies + (2 * HZ);      /* This seems to take a while.... */
2575         do {
2576                 if (!in_interrupt())
2577                         schedule_timeout_interruptible(1);
2578         } while (time_after(time, jiffies));
2579 
2580         return 0;
2581 }
2582 
2583 static int hp100_login_to_vg_hub(struct net_device *dev, u_short force_relogin)
2584 {
2585         int ioaddr = dev->base_addr;
2586         struct hp100_private *lp = netdev_priv(dev);
2587         u_short val = 0;
2588         unsigned long time;
2589         int startst;
2590 
2591 #ifdef HP100_DEBUG_B
2592         hp100_outw(0x4225, TRACE);
2593         printk("hp100: %s: login_to_vg_hub\n", dev->name);
2594 #endif
2595 
2596         /* Initiate a login sequence iff VG MAC is enabled and either Load Address
2597          * bit is zero or the force relogin flag is set (e.g. due to MAC address or
2598          * promiscuous mode change)
2599          */
2600         hp100_page(MAC_CTRL);
2601         startst = hp100_inb(VG_LAN_CFG_1);
2602         if ((force_relogin == 1) || (hp100_inb(MAC_CFG_4) & HP100_MAC_SEL_ST)) {
2603 #ifdef HP100_DEBUG_TRAINING
2604                 printk("hp100: %s: Start training\n", dev->name);
2605 #endif
2606 
2607                 /* Ensure VG Reset bit is 1 (i.e., do not reset) */
2608                 hp100_orb(HP100_VG_RESET, VG_LAN_CFG_1);
2609 
2610                 /* If Lassen AND auto-select-mode AND VG tones were sensed on */
2611                 /* entry then temporarily put them into force 100Mbit mode */
2612                 if ((lp->chip == HP100_CHIPID_LASSEN) && (startst & HP100_LINK_CABLE_ST))
2613                         hp100_andb(~HP100_DOT3_MAC, 10_LAN_CFG_2);
2614 
2615                 /* Drop the VG link by zeroing Link Up Command and Load Address  */
2616                 hp100_andb(~(HP100_LINK_CMD /* |HP100_LOAD_ADDR */ ), VG_LAN_CFG_1);
2617 
2618 #ifdef HP100_DEBUG_TRAINING
2619                 printk("hp100: %s: Bring down the link\n", dev->name);
2620 #endif
2621 
2622                 /* Wait for link to drop */
2623                 time = jiffies + (HZ / 10);
2624                 do {
2625                         if (!(hp100_inb(VG_LAN_CFG_1) & HP100_LINK_UP_ST))
2626                                 break;
2627                         if (!in_interrupt())
2628                                 schedule_timeout_interruptible(1);
2629                 } while (time_after(time, jiffies));
2630 
2631                 /* Start an addressed training and optionally request promiscuous port */
2632                 if ((dev->flags) & IFF_PROMISC) {
2633                         hp100_orb(HP100_PROM_MODE, VG_LAN_CFG_2);
2634                         if (lp->chip == HP100_CHIPID_LASSEN)
2635                                 hp100_orw(HP100_MACRQ_PROMSC, TRAIN_REQUEST);
2636                 } else {
2637                         hp100_andb(~HP100_PROM_MODE, VG_LAN_CFG_2);
2638                         /* For ETR parts we need to reset the prom. bit in the training
2639                          * register, otherwise promiscious mode won't be disabled.
2640                          */
2641                         if (lp->chip == HP100_CHIPID_LASSEN) {
2642                                 hp100_andw(~HP100_MACRQ_PROMSC, TRAIN_REQUEST);
2643                         }
2644                 }
2645 
2646                 /* With ETR parts, frame format request bits can be set. */
2647                 if (lp->chip == HP100_CHIPID_LASSEN)
2648                         hp100_orb(HP100_MACRQ_FRAMEFMT_EITHER, TRAIN_REQUEST);
2649 
2650                 hp100_orb(HP100_LINK_CMD | HP100_LOAD_ADDR | HP100_VG_RESET, VG_LAN_CFG_1);
2651 
2652                 /* Note: Next wait could be omitted for Hood and earlier chips under */
2653                 /* certain circumstances */
2654                 /* TODO: check if hood/earlier and skip wait. */
2655 
2656                 /* Wait for either short timeout for VG tones or long for login    */
2657                 /* Wait for the card hardware to signalise link cable status ok... */
2658                 hp100_page(MAC_CTRL);
2659                 time = jiffies + (1 * HZ);      /* 1 sec timeout for cable st */
2660                 do {
2661                         if (hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST)
2662                                 break;
2663                         if (!in_interrupt())
2664                                 schedule_timeout_interruptible(1);
2665                 } while (time_before(jiffies, time));
2666 
2667                 if (time_after_eq(jiffies, time)) {
2668 #ifdef HP100_DEBUG_TRAINING
2669                         printk("hp100: %s: Link cable status not ok? Training aborted.\n", dev->name);
2670 #endif
2671                 } else {
2672 #ifdef HP100_DEBUG_TRAINING
2673                         printk
2674                             ("hp100: %s: HUB tones detected. Trying to train.\n",
2675                              dev->name);
2676 #endif
2677 
2678                         time = jiffies + (2 * HZ);      /* again a timeout */
2679                         do {
2680                                 val = hp100_inb(VG_LAN_CFG_1);
2681                                 if ((val & (HP100_LINK_UP_ST))) {
2682 #ifdef HP100_DEBUG_TRAINING
2683                                         printk("hp100: %s: Passed training.\n", dev->name);
2684 #endif
2685                                         break;
2686                                 }
2687                                 if (!in_interrupt())
2688                                         schedule_timeout_interruptible(1);
2689                         } while (time_after(time, jiffies));
2690                 }
2691 
2692                 /* If LINK_UP_ST is set, then we are logged into the hub. */
2693                 if (time_before_eq(jiffies, time) && (val & HP100_LINK_UP_ST)) {
2694 #ifdef HP100_DEBUG_TRAINING
2695                         printk("hp100: %s: Successfully logged into the HUB.\n", dev->name);
2696                         if (lp->chip == HP100_CHIPID_LASSEN) {
2697                                 val = hp100_inw(TRAIN_ALLOW);
2698                                 printk("hp100: %s: Card supports 100VG MAC Version \"%s\" ",
2699                                              dev->name, (hp100_inw(TRAIN_REQUEST) & HP100_CARD_MACVER) ? "802.12" : "Pre");
2700                                 printk("Driver will use MAC Version \"%s\"\n", (val & HP100_HUB_MACVER) ? "802.12" : "Pre");
2701                                 printk("hp100: %s: Frame format is %s.\n", dev->name, (val & HP100_MALLOW_FRAMEFMT) ? "802.5" : "802.3");
2702                         }
2703 #endif
2704                 } else {
2705                         /* If LINK_UP_ST is not set, login was not successful */
2706                         printk("hp100: %s: Problem logging into the HUB.\n", dev->name);
2707                         if (lp->chip == HP100_CHIPID_LASSEN) {
2708                                 /* Check allowed Register to find out why there is a problem. */
2709                                 val = hp100_inw(TRAIN_ALLOW);   /* won't work on non-ETR card */
2710 #ifdef HP100_DEBUG_TRAINING
2711                                 printk("hp100: %s: MAC Configuration requested: 0x%04x, HUB allowed: 0x%04x\n", dev->name, hp100_inw(TRAIN_REQUEST), val);
2712 #endif
2713                                 if (val & HP100_MALLOW_ACCDENIED)
2714                                         printk("hp100: %s: HUB access denied.\n", dev->name);
2715                                 if (val & HP100_MALLOW_CONFIGURE)
2716                                         printk("hp100: %s: MAC Configuration is incompatible with the Network.\n", dev->name);
2717                                 if (val & HP100_MALLOW_DUPADDR)
2718                                         printk("hp100: %s: Duplicate MAC Address on the Network.\n", dev->name);
2719                         }
2720                 }
2721 
2722                 /* If we have put the chip into forced 100 Mbit mode earlier, go back */
2723                 /* to auto-select mode */
2724 
2725                 if ((lp->chip == HP100_CHIPID_LASSEN) && (startst & HP100_LINK_CABLE_ST)) {
2726                         hp100_page(MAC_CTRL);
2727                         hp100_orb(HP100_DOT3_MAC, 10_LAN_CFG_2);
2728                 }
2729 
2730                 val = hp100_inb(VG_LAN_CFG_1);
2731 
2732                 /* Clear the MISC_ERROR Interrupt, which might be generated when doing the relogin */
2733                 hp100_page(PERFORMANCE);
2734                 hp100_outw(HP100_MISC_ERROR, IRQ_STATUS);
2735 
2736                 if (val & HP100_LINK_UP_ST)
2737                         return 0;       /* login was ok */
2738                 else {
2739                         printk("hp100: %s: Training failed.\n", dev->name);
2740                         hp100_down_vg_link(dev);
2741                         return -EIO;
2742                 }
2743         }
2744         /* no forced relogin & already link there->no training. */
2745         return -EIO;
2746 }
2747 
2748 static void hp100_cascade_reset(struct net_device *dev, u_short enable)
2749 {
2750         int ioaddr = dev->base_addr;
2751         struct hp100_private *lp = netdev_priv(dev);
2752 
2753 #ifdef HP100_DEBUG_B
2754         hp100_outw(0x4226, TRACE);
2755         printk("hp100: %s: cascade_reset\n", dev->name);
2756 #endif
2757 
2758         if (enable) {
2759                 hp100_outw(HP100_HW_RST | HP100_RESET_LB, OPTION_LSW);
2760                 if (lp->chip == HP100_CHIPID_LASSEN) {
2761                         /* Lassen requires a PCI transmit fifo reset */
2762                         hp100_page(HW_MAP);
2763                         hp100_andb(~HP100_PCI_RESET, PCICTRL2);
2764                         hp100_orb(HP100_PCI_RESET, PCICTRL2);
2765                         /* Wait for min. 300 ns */
2766                         /* we can't use jiffies here, because it may be */
2767                         /* that we have disabled the timer... */
2768                         udelay(400);
2769                         hp100_andb(~HP100_PCI_RESET, PCICTRL2);
2770                         hp100_page(PERFORMANCE);
2771                 }
2772         } else {                /* bring out of reset */
2773                 hp100_outw(HP100_HW_RST | HP100_SET_LB, OPTION_LSW);
2774                 udelay(400);
2775                 hp100_page(PERFORMANCE);
2776         }
2777 }
2778 
2779 #ifdef HP100_DEBUG
2780 void hp100_RegisterDump(struct net_device *dev)
2781 {
2782         int ioaddr = dev->base_addr;
2783         int Page;
2784         int Register;
2785 
2786         /* Dump common registers */
2787         printk("hp100: %s: Cascade Register Dump\n", dev->name);
2788         printk("hardware id #1: 0x%.2x\n", hp100_inb(HW_ID));
2789         printk("hardware id #2/paging: 0x%.2x\n", hp100_inb(PAGING));
2790         printk("option #1: 0x%.4x\n", hp100_inw(OPTION_LSW));
2791         printk("option #2: 0x%.4x\n", hp100_inw(OPTION_MSW));
2792 
2793         /* Dump paged registers */
2794         for (Page = 0; Page < 8; Page++) {
2795                 /* Dump registers */
2796                 printk("page: 0x%.2x\n", Page);
2797                 outw(Page, ioaddr + 0x02);
2798                 for (Register = 0x8; Register < 0x22; Register += 2) {
2799                         /* Display Register contents except data port */
2800                         if (((Register != 0x10) && (Register != 0x12)) || (Page > 0)) {
2801                                 printk("0x%.2x = 0x%.4x\n", Register, inw(ioaddr + Register));
2802                         }
2803                 }
2804         }
2805         hp100_page(PERFORMANCE);
2806 }
2807 #endif
2808 
2809 
2810 static void cleanup_dev(struct net_device *d)
2811 {
2812         struct hp100_private *p = netdev_priv(d);
2813 
2814         unregister_netdev(d);
2815         release_region(d->base_addr, HP100_REGION_SIZE);
2816 
2817         if (p->mode == 1)       /* busmaster */
2818                 pci_free_consistent(p->pci_dev, MAX_RINGSIZE + 0x0f,
2819                                     p->page_vaddr_algn,
2820                                     virt_to_whatever(d, p->page_vaddr_algn));
2821         if (p->mem_ptr_virt)
2822                 iounmap(p->mem_ptr_virt);
2823 
2824         free_netdev(d);
2825 }
2826 
2827 static int hp100_eisa_probe(struct device *gendev)
2828 {
2829         struct net_device *dev = alloc_etherdev(sizeof(struct hp100_private));
2830         struct eisa_device *edev = to_eisa_device(gendev);
2831         int err;
2832 
2833         if (!dev)
2834                 return -ENOMEM;
2835 
2836         SET_NETDEV_DEV(dev, &edev->dev);
2837 
2838         err = hp100_probe1(dev, edev->base_addr + 0xC38, HP100_BUS_EISA, NULL);
2839         if (err)
2840                 goto out1;
2841 
2842 #ifdef HP100_DEBUG
2843         printk("hp100: %s: EISA adapter found at 0x%x\n", dev->name,
2844                dev->base_addr);
2845 #endif
2846         dev_set_drvdata(gendev, dev);
2847         return 0;
2848  out1:
2849         free_netdev(dev);
2850         return err;
2851 }
2852 
2853 static int hp100_eisa_remove(struct device *gendev)
2854 {
2855         struct net_device *dev = dev_get_drvdata(gendev);
2856         cleanup_dev(dev);
2857         return 0;
2858 }
2859 
2860 static struct eisa_driver hp100_eisa_driver = {
2861         .id_table = hp100_eisa_tbl,
2862         .driver   = {
2863                 .name    = "hp100",
2864                 .probe   = hp100_eisa_probe,
2865                 .remove  = hp100_eisa_remove,
2866         }
2867 };
2868 
2869 static int hp100_pci_probe(struct pci_dev *pdev,
2870                            const struct pci_device_id *ent)
2871 {
2872         struct net_device *dev;
2873         int ioaddr;
2874         u_short pci_command;
2875         int err;
2876 
2877         if (pci_enable_device(pdev))
2878                 return -ENODEV;
2879 
2880         dev = alloc_etherdev(sizeof(struct hp100_private));
2881         if (!dev) {
2882                 err = -ENOMEM;
2883                 goto out0;
2884         }
2885 
2886         SET_NETDEV_DEV(dev, &pdev->dev);
2887 
2888         pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
2889         if (!(pci_command & PCI_COMMAND_IO)) {
2890 #ifdef HP100_DEBUG
2891                 printk("hp100: %s: PCI I/O Bit has not been set. Setting...\n", dev->name);
2892 #endif
2893                 pci_command |= PCI_COMMAND_IO;
2894                 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
2895         }
2896 
2897         if (!(pci_command & PCI_COMMAND_MASTER)) {
2898 #ifdef HP100_DEBUG
2899                 printk("hp100: %s: PCI Master Bit has not been set. Setting...\n", dev->name);
2900 #endif
2901                 pci_command |= PCI_COMMAND_MASTER;
2902                 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
2903         }
2904 
2905         ioaddr = pci_resource_start(pdev, 0);
2906         err = hp100_probe1(dev, ioaddr, HP100_BUS_PCI, pdev);
2907         if (err)
2908                 goto out1;
2909 
2910 #ifdef HP100_DEBUG
2911         printk("hp100: %s: PCI adapter found at 0x%x\n", dev->name, ioaddr);
2912 #endif
2913         pci_set_drvdata(pdev, dev);
2914         return 0;
2915  out1:
2916         free_netdev(dev);
2917  out0:
2918         pci_disable_device(pdev);
2919         return err;
2920 }
2921 
2922 static void hp100_pci_remove(struct pci_dev *pdev)
2923 {
2924         struct net_device *dev = pci_get_drvdata(pdev);
2925 
2926         cleanup_dev(dev);
2927         pci_disable_device(pdev);
2928 }
2929 
2930 
2931 static struct pci_driver hp100_pci_driver = {
2932         .name           = "hp100",
2933         .id_table       = hp100_pci_tbl,
2934         .probe          = hp100_pci_probe,
2935         .remove         = hp100_pci_remove,
2936 };
2937 
2938 /*
2939  *  module section
2940  */
2941 
2942 MODULE_LICENSE("GPL");
2943 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, "
2944               "Siegfried \"Frieder\" Loeffler (dg1sek) <floeff@mathematik.uni-stuttgart.de>");
2945 MODULE_DESCRIPTION("HP CASCADE Architecture Driver for 100VG-AnyLan Network Adapters");
2946 
2947 /*
2948  * Note: to register three isa devices, use:
2949  * option hp100 hp100_port=0,0,0
2950  *        to register one card at io 0x280 as eth239, use:
2951  * option hp100 hp100_port=0x280
2952  */
2953 #if defined(MODULE) && defined(CONFIG_ISA)
2954 #define HP100_DEVICES 5
2955 /* Parameters set by insmod */
2956 static int hp100_port[HP100_DEVICES] = { 0, [1 ... (HP100_DEVICES-1)] = -1 };
2957 module_param_hw_array(hp100_port, int, ioport, NULL, 0);
2958 
2959 /* List of devices */
2960 static struct net_device *hp100_devlist[HP100_DEVICES];
2961 
2962 static int __init hp100_isa_init(void)
2963 {
2964         struct net_device *dev;
2965         int i, err, cards = 0;
2966 
2967         /* Don't autoprobe ISA bus */
2968         if (hp100_port[0] == 0)
2969                 return -ENODEV;
2970 
2971         /* Loop on all possible base addresses */
2972         for (i = 0; i < HP100_DEVICES && hp100_port[i] != -1; ++i) {
2973                 dev = alloc_etherdev(sizeof(struct hp100_private));
2974                 if (!dev) {
2975                         while (cards > 0)
2976                                 cleanup_dev(hp100_devlist[--cards]);
2977 
2978                         return -ENOMEM;
2979                 }
2980 
2981                 err = hp100_isa_probe(dev, hp100_port[i]);
2982                 if (!err)
2983                         hp100_devlist[cards++] = dev;
2984                 else
2985                         free_netdev(dev);
2986         }
2987 
2988         return cards > 0 ? 0 : -ENODEV;
2989 }
2990 
2991 static void hp100_isa_cleanup(void)
2992 {
2993         int i;
2994 
2995         for (i = 0; i < HP100_DEVICES; i++) {
2996                 struct net_device *dev = hp100_devlist[i];
2997                 if (dev)
2998                         cleanup_dev(dev);
2999         }
3000 }
3001 #else
3002 #define hp100_isa_init()        (0)
3003 #define hp100_isa_cleanup()     do { } while(0)
3004 #endif
3005 
3006 static int __init hp100_module_init(void)
3007 {
3008         int err;
3009 
3010         err = hp100_isa_init();
3011         if (err && err != -ENODEV)
3012                 goto out;
3013         err = eisa_driver_register(&hp100_eisa_driver);
3014         if (err && err != -ENODEV)
3015                 goto out2;
3016         err = pci_register_driver(&hp100_pci_driver);
3017         if (err && err != -ENODEV)
3018                 goto out3;
3019  out:
3020         return err;
3021  out3:
3022         eisa_driver_unregister (&hp100_eisa_driver);
3023  out2:
3024         hp100_isa_cleanup();
3025         goto out;
3026 }
3027 
3028 
3029 static void __exit hp100_module_exit(void)
3030 {
3031         hp100_isa_cleanup();
3032         eisa_driver_unregister (&hp100_eisa_driver);
3033         pci_unregister_driver (&hp100_pci_driver);
3034 }
3035 
3036 module_init(hp100_module_init)
3037 module_exit(hp100_module_exit)