Pileus Git - ~andy/linux/blob - drivers/staging/dgnc/dgnc_driver.c

   1 /*
   2  * Copyright 2003 Digi International (www.digi.com)
   3  *      Scott H Kilau <Scott_Kilau at digi dot com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
  12  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  13  * PURPOSE.  See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *
  20  *      NOTE TO LINUX KERNEL HACKERS:  DO NOT REFORMAT THIS CODE!
  21  *
  22  *      This is shared code between Digi's CVS archive and the
  23  *      Linux Kernel sources.
  24  *      Changing the source just for reformatting needlessly breaks
  25  *      our CVS diff history.
  26  *
  27  *      Send any bug fixes/changes to:  Eng.Linux at digi dot com.
  28  *      Thank you.
  29  *
  30  */
  31
  32
  33 #include <linux/kernel.h>
  34 #include <linux/version.h>
  35 #include <linux/module.h>
  36 #include <linux/pci.h>
  37 #include <linux/slab.h>
  38
  39 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
  40 #include <linux/sched.h>
  41 #endif
  42
  43 #include "dgnc_driver.h"
  44 #include "dgnc_pci.h"
  45 #include "dpacompat.h"
  46 #include "dgnc_mgmt.h"
  47 #include "dgnc_tty.h"
  48 #include "dgnc_trace.h"
  49 #include "dgnc_cls.h"
  50 #include "dgnc_neo.h"
  51 #include "dgnc_sysfs.h"
  52
  53 MODULE_LICENSE("GPL");
  54 MODULE_AUTHOR("Digi International, http://www.digi.com");
  55 MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");
  56 MODULE_SUPPORTED_DEVICE("dgnc");
  57
  58 /*
  59  * insmod command line overrideable parameters
  60  *
  61  * NOTE: we use a set of macros to create the variables, which allows
  62  * us to specify the variable type, name, initial value, and description.
  63  */
  64 PARM_INT(debug,         0x00,           0644,   "Driver debugging level");
  65 PARM_INT(rawreadok,     1,              0644,   "Bypass flip buffers on input");
  66 PARM_INT(trcbuf_size,   0x100000,       0644,   "Debugging trace buffer size.");
  67
  68 /**************************************************************************
  69  *
  70  * protos for this file
  71  *
  72  */
  73 static int              dgnc_start(void);
  74 static int              dgnc_finalize_board_init(struct board_t *brd);
  75 static void             dgnc_init_globals(void);
  76 static int              dgnc_found_board(struct pci_dev *pdev, int id);
  77 static void             dgnc_cleanup_board(struct board_t *brd);
  78 static void             dgnc_poll_handler(ulong dummy);
  79 static int              dgnc_init_pci(void);
  80 static int              dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
  81 static void             dgnc_remove_one(struct pci_dev *dev);
  82 static int              dgnc_probe1(struct pci_dev *pdev, int card_type);
  83 static void             dgnc_do_remap(struct board_t *brd);
  84
  85 /* Driver load/unload functions */
  86 int             dgnc_init_module(void);
  87 void            dgnc_cleanup_module(void);
  88
  89 module_init(dgnc_init_module);
  90 module_exit(dgnc_cleanup_module);
  91
  92
  93 /*
  94  * File operations permitted on Control/Management major.
  95  */
  96 static struct file_operations dgnc_BoardFops =
  97 {
  98         .owner          =       THIS_MODULE,
  99         .unlocked_ioctl =       dgnc_mgmt_ioctl,
 100         .open           =       dgnc_mgmt_open,
 101         .release        =       dgnc_mgmt_close
 102 };
 103
 104
 105 /*
 106  * Globals
 107  */
 108 uint                    dgnc_NumBoards;
 109 struct board_t          *dgnc_Board[MAXBOARDS];
 110 DEFINE_SPINLOCK(dgnc_global_lock);
 111 int                     dgnc_driver_state = DRIVER_INITIALIZED;
 112 ulong                   dgnc_poll_counter;
 113 uint                    dgnc_Major;
 114 int                     dgnc_poll_tick = 20;    /* Poll interval - 20 ms */
 115
 116 /*
 117  * Static vars.
 118  */
 119 static uint             dgnc_Major_Control_Registered = FALSE;
 120 static uint             dgnc_driver_start = FALSE;
 121
 122 static struct class *dgnc_class;
 123
 124 /*
 125  * Poller stuff
 126  */
 127 static                  DEFINE_SPINLOCK(dgnc_poll_lock);        /* Poll scheduling lock */
 128 static ulong            dgnc_poll_time;                         /* Time of next poll */
 129 static uint             dgnc_poll_stop;                         /* Used to tell poller to stop */
 130 static struct timer_list dgnc_poll_timer;
 131
 132
 133 static struct pci_device_id dgnc_pci_tbl[] = {
 134         {       DIGI_VID, PCI_DEVICE_CLASSIC_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,       0 },
 135         {       DIGI_VID, PCI_DEVICE_CLASSIC_4_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,   1 },
 136         {       DIGI_VID, PCI_DEVICE_CLASSIC_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,       2 },
 137         {       DIGI_VID, PCI_DEVICE_CLASSIC_8_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,   3 },
 138         {       DIGI_VID, PCI_DEVICE_NEO_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,           4 },
 139         {       DIGI_VID, PCI_DEVICE_NEO_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,           5 },
 140         {       DIGI_VID, PCI_DEVICE_NEO_2DB9_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,        6 },
 141         {       DIGI_VID, PCI_DEVICE_NEO_2DB9PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,     7 },
 142         {       DIGI_VID, PCI_DEVICE_NEO_2RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,       8 },
 143         {       DIGI_VID, PCI_DEVICE_NEO_2RJ45PRI_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,    9 },
 144         {       DIGI_VID, PCI_DEVICE_NEO_1_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,       10 },
 145         {       DIGI_VID, PCI_DEVICE_NEO_1_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,   11 },
 146         {       DIGI_VID, PCI_DEVICE_NEO_2_422_485_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,   12 },
 147         {       DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,    13 },
 148         {       DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,   14 },
 149         {       DIGI_VID, PCI_DEVICE_NEO_EXPRESS_4RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,       15 },
 150         {       DIGI_VID, PCI_DEVICE_NEO_EXPRESS_8RJ45_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,       16 },
 151         {0,}                                            /* 0 terminated list. */
 152 };
 153 MODULE_DEVICE_TABLE(pci, dgnc_pci_tbl);
 154
 155 struct board_id {
 156         uchar *name;
 157         uint maxports;
 158         unsigned int is_pci_express;
 159 };
 160
 161 static struct board_id dgnc_Ids[] =
 162 {
 163         {       PCI_DEVICE_CLASSIC_4_PCI_NAME,          4,      0       },
 164         {       PCI_DEVICE_CLASSIC_4_422_PCI_NAME,      4,      0       },
 165         {       PCI_DEVICE_CLASSIC_8_PCI_NAME,          8,      0       },
 166         {       PCI_DEVICE_CLASSIC_8_422_PCI_NAME,      8,      0       },
 167         {       PCI_DEVICE_NEO_4_PCI_NAME,              4,      0       },
 168         {       PCI_DEVICE_NEO_8_PCI_NAME,              8,      0       },
 169         {       PCI_DEVICE_NEO_2DB9_PCI_NAME,           2,      0       },
 170         {       PCI_DEVICE_NEO_2DB9PRI_PCI_NAME,        2,      0       },
 171         {       PCI_DEVICE_NEO_2RJ45_PCI_NAME,          2,      0       },
 172         {       PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME,       2,      0       },
 173         {       PCI_DEVICE_NEO_1_422_PCI_NAME,          1,      0       },
 174         {       PCI_DEVICE_NEO_1_422_485_PCI_NAME,      1,      0       },
 175         {       PCI_DEVICE_NEO_2_422_485_PCI_NAME,      2,      0       },
 176         {       PCI_DEVICE_NEO_EXPRESS_8_PCI_NAME,      8,      1       },
 177         {       PCI_DEVICE_NEO_EXPRESS_4_PCI_NAME,      4,      1       },
 178         {       PCI_DEVICE_NEO_EXPRESS_4RJ45_PCI_NAME,  4,      1       },
 179         {       PCI_DEVICE_NEO_EXPRESS_8RJ45_PCI_NAME,  8,      1       },
 180         {       NULL,                                   0,      0       }
 181 };
 182
 183 static struct pci_driver dgnc_driver = {
 184         .name           = "dgnc",
 185         .probe          = dgnc_init_one,
 186         .id_table       = dgnc_pci_tbl,
 187         .remove         = dgnc_remove_one,
 188 };
 189
 190
 191 char *dgnc_state_text[] = {
 192         "Board Failed",
 193         "Board Found",
 194         "Board READY",
 195 };
 196
 197 char *dgnc_driver_state_text[] = {
 198         "Driver Initialized",
 199         "Driver Ready."
 200 };
 201
 202
 203
 204 /************************************************************************
 205  *
 206  * Driver load/unload functions
 207  *
 208  ************************************************************************/
 209
 210
 211 /*
 212  * init_module()
 213  *
 214  * Module load.  This is where it all starts.
 215  */
 216 int dgnc_init_module(void)
 217 {
 218         int rc = 0;
 219
 220         APR(("%s, Digi International Part Number %s\n", DG_NAME, DG_PART));
 221
 222         /*
 223          * Initialize global stuff
 224          */
 225         rc = dgnc_start();
 226
 227         if (rc < 0) {
 228                 return(rc);
 229         }
 230
 231         /*
 232          * Find and configure all the cards
 233          */
 234         rc = dgnc_init_pci();
 235
 236         /*
 237          * If something went wrong in the scan, bail out of driver.
 238          */
 239         if (rc < 0) {
 240                 /* Only unregister the pci driver if it was actually registered. */
 241                 if (dgnc_NumBoards)
 242                         pci_unregister_driver(&dgnc_driver);
 243                 else
 244                         printk("WARNING: dgnc driver load failed.  No Digi Neo or Classic boards found.\n");
 245
 246                 dgnc_cleanup_module();
 247         }
 248         else {
 249                 dgnc_create_driver_sysfiles(&dgnc_driver);
 250         }
 251
 252         DPR_INIT(("Finished init_module. Returning %d\n", rc));
 253         return (rc);
 254 }
 255
 256
 257 /*
 258  * Start of driver.
 259  */
 260 static int dgnc_start(void)
 261 {
 262         int rc = 0;
 263         unsigned long flags;
 264
 265         if (dgnc_driver_start == FALSE) {
 266
 267                 dgnc_driver_start = TRUE;
 268
 269                 /* make sure that the globals are init'd before we do anything else */
 270                 dgnc_init_globals();
 271
 272                 dgnc_NumBoards = 0;
 273
 274                 APR(("For the tools package or updated drivers please visit http://www.digi.com\n"));
 275
 276                 /*
 277                  * Register our base character device into the kernel.
 278                  * This allows the download daemon to connect to the downld device
 279                  * before any of the boards are init'ed.
 280                  */
 281                 if (!dgnc_Major_Control_Registered) {
 282                         /*
 283                          * Register management/dpa devices
 284                          */
 285                         rc = register_chrdev(0, "dgnc", &dgnc_BoardFops);
 286                         if (rc <= 0) {
 287                                 APR(("Can't register dgnc driver device (%d)\n", rc));
 288                                 rc = -ENXIO;
 289                                 return(rc);
 290                         }
 291                         dgnc_Major = rc;
 292
 293                         dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt");
 294 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
 295                         device_create_drvdata(dgnc_class, NULL,
 296                                 MKDEV(dgnc_Major, 0),
 297                                 NULL, "dgnc_mgmt");
 298 #else
 299                         device_create(dgnc_class, NULL,
 300                                 MKDEV(dgnc_Major, 0),
 301                                 NULL, "dgnc_mgmt");
 302 #endif
 303
 304                         dgnc_Major_Control_Registered = TRUE;
 305                 }
 306
 307                 /*
 308                  * Init any global tty stuff.
 309                  */
 310                 rc = dgnc_tty_preinit();
 311
 312                 if (rc < 0) {
 313                         APR(("tty preinit - not enough memory (%d)\n", rc));
 314                         return(rc);
 315                 }
 316
 317                 /* Start the poller */
 318                 DGNC_LOCK(dgnc_poll_lock, flags);
 319                 init_timer(&dgnc_poll_timer);
 320                 dgnc_poll_timer.function = dgnc_poll_handler;
 321                 dgnc_poll_timer.data = 0;
 322                 dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick);
 323                 dgnc_poll_timer.expires = dgnc_poll_time;
 324                 DGNC_UNLOCK(dgnc_poll_lock, flags);
 325
 326                 add_timer(&dgnc_poll_timer);
 327
 328                 dgnc_driver_state = DRIVER_READY;
 329         }
 330
 331         return(rc);
 332 }
 333
 334 /*
 335  * Register pci driver, and return how many boards we have.
 336  */
 337 static int dgnc_init_pci(void)
 338 {
 339         return pci_register_driver(&dgnc_driver);
 340 }
 341
 342
 343 /* returns count (>= 0), or negative on error */
 344 static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 345 {
 346         int rc;
 347
 348         /* wake up and enable device */
 349         rc = pci_enable_device(pdev);
 350
 351         if (rc < 0) {
 352                 rc = -EIO;
 353         } else {
 354                 rc = dgnc_probe1(pdev, ent->driver_data);
 355                 if (rc == 0) {
 356                         dgnc_NumBoards++;
 357                         DPR_INIT(("Incrementing numboards to %d\n", dgnc_NumBoards));
 358                 }
 359         }
 360         return rc;
 361 }
 362
 363 static int dgnc_probe1(struct pci_dev *pdev, int card_type)
 364 {
 365         return dgnc_found_board(pdev, card_type);
 366 }
 367
 368
 369 static void dgnc_remove_one(struct pci_dev *dev)
 370 {
 371         /* Do Nothing */
 372 }
 373
 374 /*
 375  * dgnc_cleanup_module()
 376  *
 377  * Module unload.  This is where it all ends.
 378  */
 379 void dgnc_cleanup_module(void)
 380 {
 381         int i;
 382         ulong lock_flags;
 383
 384         DGNC_LOCK(dgnc_poll_lock, lock_flags);
 385         dgnc_poll_stop = 1;
 386         DGNC_UNLOCK(dgnc_poll_lock, lock_flags);
 387
 388         /* Turn off poller right away. */
 389         del_timer_sync(&dgnc_poll_timer);
 390
 391         dgnc_remove_driver_sysfiles(&dgnc_driver);
 392
 393         if (dgnc_Major_Control_Registered) {
 394                 device_destroy(dgnc_class, MKDEV(dgnc_Major, 0));
 395                 class_destroy(dgnc_class);
 396                 unregister_chrdev(dgnc_Major, "dgnc");
 397         }
 398
 399         for (i = 0; i < dgnc_NumBoards; ++i) {
 400                 dgnc_remove_ports_sysfiles(dgnc_Board[i]);
 401                 dgnc_tty_uninit(dgnc_Board[i]);
 402                 dgnc_cleanup_board(dgnc_Board[i]);
 403         }
 404
 405         dgnc_tty_post_uninit();
 406
 407 #if defined(DGNC_TRACER)
 408         /* last thing, make sure we release the tracebuffer */
 409         dgnc_tracer_free();
 410 #endif
 411         if (dgnc_NumBoards)
 412                 pci_unregister_driver(&dgnc_driver);
 413 }
 414
 415
 416 /*
 417  * dgnc_cleanup_board()
 418  *
 419  * Free all the memory associated with a board
 420  */
 421 static void dgnc_cleanup_board(struct board_t *brd)
 422 {
 423         int i = 0;
 424
 425         if(!brd || brd->magic != DGNC_BOARD_MAGIC)
 426                 return;
 427
 428         switch (brd->device) {
 429         case PCI_DEVICE_CLASSIC_4_DID:
 430         case PCI_DEVICE_CLASSIC_8_DID:
 431         case PCI_DEVICE_CLASSIC_4_422_DID:
 432         case PCI_DEVICE_CLASSIC_8_422_DID:
 433
 434                 /* Tell card not to interrupt anymore. */
 435                 outb(0, brd->iobase + 0x4c);
 436                 break;
 437
 438         default:
 439                 break;
 440         }
 441
 442         if (brd->irq)
 443                 free_irq(brd->irq, brd);
 444
 445         tasklet_kill(&brd->helper_tasklet);
 446
 447         if (brd->re_map_membase) {
 448                 iounmap(brd->re_map_membase);
 449                 brd->re_map_membase = NULL;
 450         }
 451
 452         if (brd->msgbuf_head) {
 453                 unsigned long flags;
 454
 455                 DGNC_LOCK(dgnc_global_lock, flags);
 456                 brd->msgbuf = NULL;
 457                 printk(brd->msgbuf_head);
 458                 kfree(brd->msgbuf_head);
 459                 brd->msgbuf_head = NULL;
 460                 DGNC_UNLOCK(dgnc_global_lock, flags);
 461         }
 462
 463         /* Free all allocated channels structs */
 464         for (i = 0; i < MAXPORTS ; i++) {
 465                 if (brd->channels[i]) {
 466                         if (brd->channels[i]->ch_rqueue)
 467                                 kfree(brd->channels[i]->ch_rqueue);
 468                         if (brd->channels[i]->ch_equeue)
 469                                 kfree(brd->channels[i]->ch_equeue);
 470                         if (brd->channels[i]->ch_wqueue)
 471                                 kfree(brd->channels[i]->ch_wqueue);
 472
 473                         kfree(brd->channels[i]);
 474                         brd->channels[i] = NULL;
 475                 }
 476         }
 477
 478         if (brd->flipbuf)
 479                 kfree(brd->flipbuf);
 480
 481         dgnc_Board[brd->boardnum] = NULL;
 482
 483         kfree(brd);
 484 }
 485
 486
 487 /*
 488  * dgnc_found_board()
 489  *
 490  * A board has been found, init it.
 491  */
 492 static int dgnc_found_board(struct pci_dev *pdev, int id)
 493 {
 494         struct board_t *brd;
 495         unsigned int pci_irq;
 496         int i = 0;
 497         int rc = 0;
 498         unsigned long flags;
 499
 500         /* get the board structure and prep it */
 501         brd = dgnc_Board[dgnc_NumBoards] =
 502         (struct board_t *) kzalloc(sizeof(struct board_t), GFP_KERNEL);
 503         if (!brd) {
 504                 APR(("memory allocation for board structure failed\n"));
 505                 return(-ENOMEM);
 506         }
 507
 508         /* make a temporary message buffer for the boot messages */
 509         brd->msgbuf = brd->msgbuf_head =
 510                 (char *) kzalloc(sizeof(char) * 8192, GFP_KERNEL);
 511         if (!brd->msgbuf) {
 512                 kfree(brd);
 513                 APR(("memory allocation for board msgbuf failed\n"));
 514                 return(-ENOMEM);
 515         }
 516
 517         /* store the info for the board we've found */
 518         brd->magic = DGNC_BOARD_MAGIC;
 519         brd->boardnum = dgnc_NumBoards;
 520         brd->vendor = dgnc_pci_tbl[id].vendor;
 521         brd->device = dgnc_pci_tbl[id].device;
 522         brd->pdev = pdev;
 523         brd->pci_bus = pdev->bus->number;
 524         brd->pci_slot = PCI_SLOT(pdev->devfn);
 525         brd->name = dgnc_Ids[id].name;
 526         brd->maxports = dgnc_Ids[id].maxports;
 527         if (dgnc_Ids[i].is_pci_express)
 528                 brd->bd_flags |= BD_IS_PCI_EXPRESS;
 529         brd->dpastatus = BD_NOFEP;
 530         init_waitqueue_head(&brd->state_wait);
 531
 532         DGNC_SPINLOCK_INIT(brd->bd_lock);
 533         DGNC_SPINLOCK_INIT(brd->bd_intr_lock);
 534
 535         brd->state              = BOARD_FOUND;
 536
 537         for (i = 0; i < MAXPORTS; i++) {
 538                 brd->channels[i] = NULL;
 539         }
 540
 541         /* store which card & revision we have */
 542         pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &brd->subvendor);
 543         pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &brd->subdevice);
 544         pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
 545
 546         pci_irq = pdev->irq;
 547         brd->irq = pci_irq;
 548
 549
 550         switch(brd->device) {
 551
 552         case PCI_DEVICE_CLASSIC_4_DID:
 553         case PCI_DEVICE_CLASSIC_8_DID:
 554         case PCI_DEVICE_CLASSIC_4_422_DID:
 555         case PCI_DEVICE_CLASSIC_8_422_DID:
 556
 557                 brd->dpatype = T_CLASSIC | T_PCIBUS;
 558
 559                 DPR_INIT(("dgnc_found_board - Classic.\n"));
 560
 561                 /*
 562                  * For PCI ClassicBoards
 563                  * PCI Local Address (i.e. "resource" number) space
 564                  * 0    PLX Memory Mapped Config
 565                  * 1    PLX I/O Mapped Config
 566                  * 2    I/O Mapped UARTs and Status
 567                  * 3    Memory Mapped VPD
 568                  * 4    Memory Mapped UARTs and Status
 569                  */
 570
 571
 572                 /* get the PCI Base Address Registers */
 573                 brd->membase = pci_resource_start(pdev, 4);
 574
 575                 if (!brd->membase) {
 576                         APR(("card has no PCI IO resources, failing board.\n"));
 577                         return -ENODEV;
 578                 }
 579
 580                 brd->membase_end = pci_resource_end(pdev, 4);
 581
 582                 if (brd->membase & 1)
 583                         brd->membase &= ~3;
 584                 else
 585                         brd->membase &= ~15;
 586
 587                 brd->iobase     = pci_resource_start(pdev, 1);
 588                 brd->iobase_end = pci_resource_end(pdev, 1);
 589                 brd->iobase     = ((unsigned int) (brd->iobase)) & 0xFFFE;
 590
 591                 /* Assign the board_ops struct */
 592                 brd->bd_ops = &dgnc_cls_ops;
 593
 594                 brd->bd_uart_offset = 0x8;
 595                 brd->bd_dividend = 921600;
 596
 597                 dgnc_do_remap(brd);
 598
 599                 /* Get and store the board VPD, if it exists */
 600                 brd->bd_ops->vpd(brd);
 601
 602                 /*
 603                  * Enable Local Interrupt 1               (0x1),
 604                  * Local Interrupt 1 Polarity Active high (0x2),
 605                  * Enable PCI interrupt                   (0x40)
 606                  */
 607                 outb(0x43, brd->iobase + 0x4c);
 608
 609                 break;
 610
 611
 612         case PCI_DEVICE_NEO_4_DID:
 613         case PCI_DEVICE_NEO_8_DID:
 614         case PCI_DEVICE_NEO_2DB9_DID:
 615         case PCI_DEVICE_NEO_2DB9PRI_DID:
 616         case PCI_DEVICE_NEO_2RJ45_DID:
 617         case PCI_DEVICE_NEO_2RJ45PRI_DID:
 618         case PCI_DEVICE_NEO_1_422_DID:
 619         case PCI_DEVICE_NEO_1_422_485_DID:
 620         case PCI_DEVICE_NEO_2_422_485_DID:
 621         case PCI_DEVICE_NEO_EXPRESS_8_DID:
 622         case PCI_DEVICE_NEO_EXPRESS_4_DID:
 623         case PCI_DEVICE_NEO_EXPRESS_4RJ45_DID:
 624         case PCI_DEVICE_NEO_EXPRESS_8RJ45_DID:
 625
 626                 /*
 627                  * This chip is set up 100% when we get to it.
 628                  * No need to enable global interrupts or anything.
 629                  */
 630                 if (brd->bd_flags & BD_IS_PCI_EXPRESS)
 631                         brd->dpatype = T_NEO_EXPRESS | T_PCIBUS;
 632                 else
 633                         brd->dpatype = T_NEO | T_PCIBUS;
 634
 635                 DPR_INIT(("dgnc_found_board - NEO.\n"));
 636
 637                 /* get the PCI Base Address Registers */
 638                 brd->membase     = pci_resource_start(pdev, 0);
 639                 brd->membase_end = pci_resource_end(pdev, 0);
 640
 641                 if (brd->membase & 1)
 642                         brd->membase &= ~3;
 643                 else
 644                         brd->membase &= ~15;
 645
 646                 /* Assign the board_ops struct */
 647                 brd->bd_ops = &dgnc_neo_ops;
 648
 649                 brd->bd_uart_offset = 0x200;
 650                 brd->bd_dividend = 921600;
 651
 652                 dgnc_do_remap(brd);
 653
 654                 if (brd->re_map_membase) {
 655
 656                         /* After remap is complete, we need to read and store the dvid */
 657                         brd->dvid = readb(brd->re_map_membase + 0x8D);
 658
 659                         /* Get and store the board VPD, if it exists */
 660                         brd->bd_ops->vpd(brd);
 661                 }
 662                 break;
 663
 664         default:
 665                 APR(("Did not find any compatible Neo or Classic PCI boards in system.\n"));
 666                 return (-ENXIO);
 667
 668         }
 669
 670         /*
 671          * Do tty device initialization.
 672          */
 673
 674         rc = dgnc_tty_register(brd);
 675         if (rc < 0) {
 676                 dgnc_tty_uninit(brd);
 677                 APR(("Can't register tty devices (%d)\n", rc));
 678                 brd->state = BOARD_FAILED;
 679                 brd->dpastatus = BD_NOFEP;
 680                 goto failed;
 681         }
 682
 683         rc = dgnc_finalize_board_init(brd);
 684         if (rc < 0) {
 685                 APR(("Can't finalize board init (%d)\n", rc));
 686                 brd->state = BOARD_FAILED;
 687                 brd->dpastatus = BD_NOFEP;
 688
 689                 goto failed;
 690         }
 691
 692         rc = dgnc_tty_init(brd);
 693         if (rc < 0) {
 694                 dgnc_tty_uninit(brd);
 695                 APR(("Can't init tty devices (%d)\n", rc));
 696                 brd->state = BOARD_FAILED;
 697                 brd->dpastatus = BD_NOFEP;
 698
 699                 goto failed;
 700         }
 701
 702         brd->state = BOARD_READY;
 703         brd->dpastatus = BD_RUNNING;
 704
 705         dgnc_create_ports_sysfiles(brd);
 706
 707         /* init our poll helper tasklet */
 708         tasklet_init(&brd->helper_tasklet, brd->bd_ops->tasklet, (unsigned long) brd);
 709
 710         DPR_INIT(("dgnc_scan(%d) - printing out the msgbuf\n", i));
 711         DGNC_LOCK(dgnc_global_lock, flags);
 712         brd->msgbuf = NULL;
 713         printk(brd->msgbuf_head);
 714         kfree(brd->msgbuf_head);
 715         brd->msgbuf_head = NULL;
 716         DGNC_UNLOCK(dgnc_global_lock, flags);
 717
 718         /*
 719          * allocate flip buffer for board.
 720          *
 721          * Okay to malloc with GFP_KERNEL, we are not at interrupt
 722          * context, and there are no locks held.
 723          */
 724         brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
 725
 726         wake_up_interruptible(&brd->state_wait);
 727
 728         return(0);
 729
 730 failed:
 731
 732         return (-ENXIO);
 733
 734 }
 735
 736
 737 static int dgnc_finalize_board_init(struct board_t *brd) {
 738         int rc = 0;
 739
 740         DPR_INIT(("dgnc_finalize_board_init() - start\n"));
 741
 742         if (!brd || brd->magic != DGNC_BOARD_MAGIC)
 743                 return(-ENODEV);
 744
 745         DPR_INIT(("dgnc_finalize_board_init() - start #2\n"));
 746
 747         if (brd->irq) {
 748                 rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "DGNC", brd);
 749
 750                 if (rc) {
 751                         printk("Failed to hook IRQ %d\n",brd->irq);
 752                         brd->state = BOARD_FAILED;
 753                         brd->dpastatus = BD_NOFEP;
 754                         rc = -ENODEV;
 755                 } else {
 756                         DPR_INIT(("Requested and received usage of IRQ %d\n", brd->irq));
 757                 }
 758         }
 759         return(rc);
 760 }
 761
 762 /*
 763  * Remap PCI memory.
 764  */
 765 static void dgnc_do_remap(struct board_t *brd)
 766 {
 767
 768         if (!brd || brd->magic != DGNC_BOARD_MAGIC)
 769                 return;
 770
 771         brd->re_map_membase = ioremap(brd->membase, 0x1000);
 772
 773         DPR_INIT(("remapped mem: 0x%p\n", brd->re_map_membase));
 774 }
 775
 776
 777 /*****************************************************************************
 778 *
 779 * Function:
 780 *
 781 *    dgnc_poll_handler
 782 *
 783 * Author:
 784 *
 785 *    Scott H Kilau
 786 *
 787 * Parameters:
 788 *
 789 *    dummy -- ignored
 790 *
 791 * Return Values:
 792 *
 793 *    none
 794 *
 795 * Description:
 796 *
 797 *    As each timer expires, it determines (a) whether the "transmit"
 798 *    waiter needs to be woken up, and (b) whether the poller needs to
 799 *    be rescheduled.
 800 *
 801 ******************************************************************************/
 802
 803 static void dgnc_poll_handler(ulong dummy)
 804 {
 805         struct board_t *brd;
 806         unsigned long lock_flags;
 807         int i;
 808         unsigned long new_time;
 809
 810         dgnc_poll_counter++;
 811
 812         /*
 813          * Do not start the board state machine until
 814          * driver tells us its up and running, and has
 815          * everything it needs.
 816          */
 817         if (dgnc_driver_state != DRIVER_READY) {
 818                 goto schedule_poller;
 819         }
 820
 821         /* Go thru each board, kicking off a tasklet for each if needed */
 822         for (i = 0; i < dgnc_NumBoards; i++) {
 823                 brd = dgnc_Board[i];
 824
 825                 DGNC_LOCK(brd->bd_lock, lock_flags);
 826
 827                 /* If board is in a failed state, don't bother scheduling a tasklet */
 828                 if (brd->state == BOARD_FAILED) {
 829                         DGNC_UNLOCK(brd->bd_lock, lock_flags);
 830                         continue;
 831                 }
 832
 833                 /* Schedule a poll helper task */
 834                 tasklet_schedule(&brd->helper_tasklet);
 835
 836                 DGNC_UNLOCK(brd->bd_lock, lock_flags);
 837         }
 838
 839 schedule_poller:
 840
 841         /*
 842          * Schedule ourself back at the nominal wakeup interval.
 843          */
 844         DGNC_LOCK(dgnc_poll_lock, lock_flags);
 845         dgnc_poll_time += dgnc_jiffies_from_ms(dgnc_poll_tick);
 846
 847         new_time = dgnc_poll_time - jiffies;
 848
 849         if ((ulong) new_time >= 2 * dgnc_poll_tick) {
 850                 dgnc_poll_time = jiffies +  dgnc_jiffies_from_ms(dgnc_poll_tick);
 851         }
 852
 853         init_timer(&dgnc_poll_timer);
 854         dgnc_poll_timer.function = dgnc_poll_handler;
 855         dgnc_poll_timer.data = 0;
 856         dgnc_poll_timer.expires = dgnc_poll_time;
 857         DGNC_UNLOCK(dgnc_poll_lock, lock_flags);
 858
 859         if (!dgnc_poll_stop)
 860                 add_timer(&dgnc_poll_timer);
 861 }
 862
 863 /*
 864  * dgnc_init_globals()
 865  *
 866  * This is where we initialize the globals from the static insmod
 867  * configuration variables.  These are declared near the head of
 868  * this file.
 869  */
 870 static void dgnc_init_globals(void)
 871 {
 872         int i = 0;
 873
 874         dgnc_rawreadok          = rawreadok;
 875         dgnc_trcbuf_size        = trcbuf_size;
 876         dgnc_debug              = debug;
 877
 878         for (i = 0; i < MAXBOARDS; i++) {
 879                 dgnc_Board[i] = NULL;
 880         }
 881
 882         init_timer(&dgnc_poll_timer);
 883 }
 884
 885
 886 /************************************************************************
 887  *
 888  * Utility functions
 889  *
 890  ************************************************************************/
 891
 892 /*
 893  * dgnc_ms_sleep()
 894  *
 895  * Put the driver to sleep for x ms's
 896  *
 897  * Returns 0 if timed out, !0 (showing signal) if interrupted by a signal.
 898  */
 899 int dgnc_ms_sleep(ulong ms)
 900 {
 901         current->state = TASK_INTERRUPTIBLE;
 902         schedule_timeout((ms * HZ) / 1000);
 903         return (signal_pending(current));
 904 }
 905
 906
 907
 908 /*
 909  *      dgnc_ioctl_name() : Returns a text version of each ioctl value.
 910  */
 911 char *dgnc_ioctl_name(int cmd)
 912 {
 913         switch(cmd) {
 914
 915         case TCGETA:            return("TCGETA");
 916         case TCGETS:            return("TCGETS");
 917         case TCSETA:            return("TCSETA");
 918         case TCSETS:            return("TCSETS");
 919         case TCSETAW:           return("TCSETAW");
 920         case TCSETSW:           return("TCSETSW");
 921         case TCSETAF:           return("TCSETAF");
 922         case TCSETSF:           return("TCSETSF");
 923         case TCSBRK:            return("TCSBRK");
 924         case TCXONC:            return("TCXONC");
 925         case TCFLSH:            return("TCFLSH");
 926         case TIOCGSID:          return("TIOCGSID");
 927
 928         case TIOCGETD:          return("TIOCGETD");
 929         case TIOCSETD:          return("TIOCSETD");
 930         case TIOCGWINSZ:        return("TIOCGWINSZ");
 931         case TIOCSWINSZ:        return("TIOCSWINSZ");
 932
 933         case TIOCMGET:          return("TIOCMGET");
 934         case TIOCMSET:          return("TIOCMSET");
 935         case TIOCMBIS:          return("TIOCMBIS");
 936         case TIOCMBIC:          return("TIOCMBIC");
 937
 938         /* from digi.h */
 939         case DIGI_SETA:         return("DIGI_SETA");
 940         case DIGI_SETAW:        return("DIGI_SETAW");
 941         case DIGI_SETAF:        return("DIGI_SETAF");
 942         case DIGI_SETFLOW:      return("DIGI_SETFLOW");
 943         case DIGI_SETAFLOW:     return("DIGI_SETAFLOW");
 944         case DIGI_GETFLOW:      return("DIGI_GETFLOW");
 945         case DIGI_GETAFLOW:     return("DIGI_GETAFLOW");
 946         case DIGI_GETA:         return("DIGI_GETA");
 947         case DIGI_GEDELAY:      return("DIGI_GEDELAY");
 948         case DIGI_SEDELAY:      return("DIGI_SEDELAY");
 949         case DIGI_GETCUSTOMBAUD: return("DIGI_GETCUSTOMBAUD");
 950         case DIGI_SETCUSTOMBAUD: return("DIGI_SETCUSTOMBAUD");
 951         case TIOCMODG:          return("TIOCMODG");
 952         case TIOCMODS:          return("TIOCMODS");
 953         case TIOCSDTR:          return("TIOCSDTR");
 954         case TIOCCDTR:          return("TIOCCDTR");
 955
 956         default:                return("unknown");
 957         }
 958 }