drivers/isdn/hardware/eicon/divasmain.c

   1 /* $Id: divasmain.c,v 1.55.4.6 2005/02/09 19:28:20 armin Exp $
   2  *
   3  * Low level driver for Eicon DIVA Server ISDN cards.
   4  *
   5  * Copyright 2000-2003 by Armin Schindler (mac@melware.de)
   6  * Copyright 2000-2003 Cytronics & Melware (info@melware.de)
   7  *
   8  * This software may be used and distributed according to the terms
   9  * of the GNU General Public License, incorporated herein by reference.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/sched.h>
  16 #include <asm/uaccess.h>
  17 #include <asm/io.h>
  18 #include <linux/ioport.h>
  19 #include <linux/workqueue.h>
  20 #include <linux/pci.h>
  21 #include <linux/smp_lock.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/list.h>
  24 #include <linux/poll.h>
  25 #include <linux/kmod.h>
  26
  27 #include "platform.h"
  28 #undef ID_MASK
  29 #undef N_DATA
  30 #include "pc.h"
  31 #include "di_defs.h"
  32 #include "divasync.h"
  33 #include "diva.h"
  34 #include "di.h"
  35 #include "io.h"
  36 #include "xdi_msg.h"
  37 #include "xdi_adapter.h"
  38 #include "xdi_vers.h"
  39 #include "diva_dma.h"
  40 #include "diva_pci.h"
  41
  42 static char *main_revision = "$Revision: 1.55.4.6 $";
  43
  44 static int major;
  45
  46 static int dbgmask;
  47
  48 MODULE_DESCRIPTION("Kernel driver for Eicon DIVA Server cards");
  49 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
  50 MODULE_LICENSE("GPL");
  51
  52 module_param(dbgmask, int, 0);
  53 MODULE_PARM_DESC(dbgmask, "initial debug mask");
  54
  55 static char *DRIVERNAME =
  56     "Eicon DIVA Server driver (http://www.melware.net)";
  57 static char *DRIVERLNAME = "divas";
  58 static char *DEVNAME = "Divas";
  59 char *DRIVERRELEASE_DIVAS = "2.0";
  60
  61 extern irqreturn_t diva_os_irq_wrapper(int irq, void *context);
  62 extern int create_divas_proc(void);
  63 extern void remove_divas_proc(void);
  64 extern void diva_get_vserial_number(PISDN_ADAPTER IoAdapter, char *buf);
  65 extern int divasfunc_init(int dbgmask);
  66 extern void divasfunc_exit(void);
  67
  68 typedef struct _diva_os_thread_dpc {
  69         struct tasklet_struct divas_task;
  70         diva_os_soft_isr_t *psoft_isr;
  71 } diva_os_thread_dpc_t;
  72
  73 /* --------------------------------------------------------------------------
  74     PCI driver interface section
  75    -------------------------------------------------------------------------- */
  76 /*
  77   vendor, device        Vendor and device ID to match (or PCI_ANY_ID)
  78   subvendor,    Subsystem vendor and device ID to match (or PCI_ANY_ID)
  79   subdevice
  80   class,                Device class to match. The class_mask tells which bits
  81   class_mask    of the class are honored during the comparison.
  82   driver_data   Data private to the driver.
  83   */
  84
  85 #if !defined(PCI_DEVICE_ID_EICON_MAESTRAP_2)
  86 #define PCI_DEVICE_ID_EICON_MAESTRAP_2       0xE015
  87 #endif
  88
  89 #if !defined(PCI_DEVICE_ID_EICON_4BRI_VOIP)
  90 #define PCI_DEVICE_ID_EICON_4BRI_VOIP        0xE016
  91 #endif
  92
  93 #if !defined(PCI_DEVICE_ID_EICON_4BRI_2_VOIP)
  94 #define PCI_DEVICE_ID_EICON_4BRI_2_VOIP      0xE017
  95 #endif
  96
  97 #if !defined(PCI_DEVICE_ID_EICON_BRI2M_2)
  98 #define PCI_DEVICE_ID_EICON_BRI2M_2          0xE018
  99 #endif
 100
 101 #if !defined(PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP)
 102 #define PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP  0xE019
 103 #endif
 104
 105 #if !defined(PCI_DEVICE_ID_EICON_2F)
 106 #define PCI_DEVICE_ID_EICON_2F               0xE01A
 107 #endif
 108
 109 #if !defined(PCI_DEVICE_ID_EICON_BRI2M_2_VOIP)
 110 #define PCI_DEVICE_ID_EICON_BRI2M_2_VOIP     0xE01B
 111 #endif
 112
 113 /*
 114   This table should be sorted by PCI device ID
 115   */
 116 static struct pci_device_id divas_pci_tbl[] = {
 117 /* Diva Server BRI-2M PCI 0xE010 */
 118         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRA,
 119          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_MAESTRA_PCI},
 120 /* Diva Server 4BRI-8M PCI 0xE012 */
 121         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAQ,
 122          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_Q_8M_PCI},
 123 /* Diva Server 4BRI-8M 2.0 PCI 0xE013 */
 124         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAQ_U,
 125          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_Q_8M_V2_PCI},
 126 /* Diva Server PRI-30M PCI 0xE014 */
 127         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAP,
 128          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_P_30M_PCI},
 129 /* Diva Server PRI 2.0 adapter 0xE015 */
 130         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAP_2,
 131          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_P_30M_V2_PCI},
 132 /* Diva Server Voice 4BRI-8M PCI 0xE016 */
 133         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_4BRI_VOIP,
 134          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_VOICE_Q_8M_PCI},
 135 /* Diva Server Voice 4BRI-8M 2.0 PCI 0xE017 */
 136         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_4BRI_2_VOIP,
 137          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_VOICE_Q_8M_V2_PCI},
 138 /* Diva Server BRI-2M 2.0 PCI 0xE018 */
 139         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_BRI2M_2,
 140          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_B_2M_V2_PCI},
 141 /* Diva Server Voice PRI 2.0 PCI 0xE019 */
 142         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP,
 143          PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 144          CARDTYPE_DIVASRV_VOICE_P_30M_V2_PCI},
 145 /* Diva Server 2FX 0xE01A */
 146         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_2F,
 147          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_B_2F_PCI},
 148 /* Diva Server Voice BRI-2M 2.0 PCI 0xE01B */
 149         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_BRI2M_2_VOIP,
 150          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_VOICE_B_2M_V2_PCI},
 151         {0,}                    /* 0 terminated list. */
 152 };
 153 MODULE_DEVICE_TABLE(pci, divas_pci_tbl);
 154
 155 static int divas_init_one(struct pci_dev *pdev,
 156                           const struct pci_device_id *ent);
 157 static void __devexit divas_remove_one(struct pci_dev *pdev);
 158
 159 static struct pci_driver diva_pci_driver = {
 160         .name     = "divas",
 161         .probe    = divas_init_one,
 162         .remove   = __devexit_p(divas_remove_one),
 163         .id_table = divas_pci_tbl,
 164 };
 165
 166 /*********************************************************
 167  ** little helper functions
 168  *********************************************************/
 169 static char *getrev(const char *revision)
 170 {
 171         char *rev;
 172         char *p;
 173         if ((p = strchr(revision, ':'))) {
 174                 rev = p + 2;
 175                 p = strchr(rev, '$');
 176                 *--p = 0;
 177         } else
 178                 rev = "1.0";
 179         return rev;
 180 }
 181
 182 void diva_log_info(unsigned char *format, ...)
 183 {
 184         va_list args;
 185         unsigned char line[160];
 186
 187         va_start(args, format);
 188         vsnprintf(line, sizeof(line), format, args);
 189         va_end(args);
 190
 191         printk(KERN_INFO "%s: %s\n", DRIVERLNAME, line);
 192 }
 193
 194 void divas_get_version(char *p)
 195 {
 196         char tmprev[32];
 197
 198         strcpy(tmprev, main_revision);
 199         sprintf(p, "%s: %s(%s) %s(%s) major=%d\n", DRIVERLNAME, DRIVERRELEASE_DIVAS,
 200                 getrev(tmprev), diva_xdi_common_code_build, DIVA_BUILD, major);
 201 }
 202
 203 /* --------------------------------------------------------------------------
 204     PCI Bus services
 205    -------------------------------------------------------------------------- */
 206 byte diva_os_get_pci_bus(void *pci_dev_handle)
 207 {
 208         struct pci_dev *pdev = (struct pci_dev *) pci_dev_handle;
 209         return ((byte) pdev->bus->number);
 210 }
 211
 212 byte diva_os_get_pci_func(void *pci_dev_handle)
 213 {
 214         struct pci_dev *pdev = (struct pci_dev *) pci_dev_handle;
 215         return ((byte) pdev->devfn);
 216 }
 217
 218 unsigned long divasa_get_pci_irq(unsigned char bus, unsigned char func,
 219                                  void *pci_dev_handle)
 220 {
 221         unsigned char irq = 0;
 222         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 223
 224         irq = dev->irq;
 225
 226         return ((unsigned long) irq);
 227 }
 228
 229 unsigned long divasa_get_pci_bar(unsigned char bus, unsigned char func,
 230                                  int bar, void *pci_dev_handle)
 231 {
 232         unsigned long ret = 0;
 233         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 234
 235         if (bar < 6) {
 236                 ret = dev->resource[bar].start;
 237         }
 238
 239         DBG_TRC(("GOT BAR[%d]=%08x", bar, ret));
 240
 241         {
 242                 unsigned long type = (ret & 0x00000001);
 243                 if (type & PCI_BASE_ADDRESS_SPACE_IO) {
 244                         DBG_TRC(("  I/O"));
 245                         ret &= PCI_BASE_ADDRESS_IO_MASK;
 246                 } else {
 247                         DBG_TRC(("  memory"));
 248                         ret &= PCI_BASE_ADDRESS_MEM_MASK;
 249                 }
 250                 DBG_TRC(("  final=%08x", ret));
 251         }
 252
 253         return (ret);
 254 }
 255
 256 void PCIwrite(byte bus, byte func, int offset, void *data, int length,
 257               void *pci_dev_handle)
 258 {
 259         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 260
 261         switch (length) {
 262         case 1:         /* byte */
 263                 pci_write_config_byte(dev, offset,
 264                                       *(unsigned char *) data);
 265                 break;
 266         case 2:         /* word */
 267                 pci_write_config_word(dev, offset,
 268                                       *(unsigned short *) data);
 269                 break;
 270         case 4:         /* dword */
 271                 pci_write_config_dword(dev, offset,
 272                                        *(unsigned int *) data);
 273                 break;
 274
 275         default:                /* buffer */
 276                 if (!(length % 4) && !(length & 0x03)) {        /* Copy as dword */
 277                         dword *p = (dword *) data;
 278                         length /= 4;
 279
 280                         while (length--) {
 281                                 pci_write_config_dword(dev, offset,
 282                                                        *(unsigned int *)
 283                                                        p++);
 284                         }
 285                 } else {        /* copy as byte stream */
 286                         byte *p = (byte *) data;
 287
 288                         while (length--) {
 289                                 pci_write_config_byte(dev, offset,
 290                                                       *(unsigned char *)
 291                                                       p++);
 292                         }
 293                 }
 294         }
 295 }
 296
 297 void PCIread(byte bus, byte func, int offset, void *data, int length,
 298              void *pci_dev_handle)
 299 {
 300         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 301
 302         switch (length) {
 303         case 1:         /* byte */
 304                 pci_read_config_byte(dev, offset, (unsigned char *) data);
 305                 break;
 306         case 2:         /* word */
 307                 pci_read_config_word(dev, offset, (unsigned short *) data);
 308                 break;
 309         case 4:         /* dword */
 310                 pci_read_config_dword(dev, offset, (unsigned int *) data);
 311                 break;
 312
 313         default:                /* buffer */
 314                 if (!(length % 4) && !(length & 0x03)) {        /* Copy as dword */
 315                         dword *p = (dword *) data;
 316                         length /= 4;
 317
 318                         while (length--) {
 319                                 pci_read_config_dword(dev, offset,
 320                                                       (unsigned int *)
 321                                                       p++);
 322                         }
 323                 } else {        /* copy as byte stream */
 324                         byte *p = (byte *) data;
 325
 326                         while (length--) {
 327                                 pci_read_config_byte(dev, offset,
 328                                                      (unsigned char *)
 329                                                      p++);
 330                         }
 331                 }
 332         }
 333 }
 334
 335 /*
 336   Init map with DMA pages. It is not problem if some allocations fail -
 337   the channels that will not get one DMA page will use standard PIO
 338   interface
 339   */
 340 static void *diva_pci_alloc_consistent(struct pci_dev *hwdev,
 341                                        size_t size,
 342                                        dma_addr_t * dma_handle,
 343                                        void **addr_handle)
 344 {
 345         void *addr = pci_alloc_consistent(hwdev, size, dma_handle);
 346
 347         *addr_handle = addr;
 348
 349         return (addr);
 350 }
 351
 352 void diva_init_dma_map(void *hdev,
 353                        struct _diva_dma_map_entry **ppmap, int nentries)
 354 {
 355         struct pci_dev *pdev = (struct pci_dev *) hdev;
 356         struct _diva_dma_map_entry *pmap =
 357             diva_alloc_dma_map(hdev, nentries);
 358
 359         if (pmap) {
 360                 int i;
 361                 dma_addr_t dma_handle;
 362                 void *cpu_addr;
 363                 void *addr_handle;
 364
 365                 for (i = 0; i < nentries; i++) {
 366                         if (!(cpu_addr = diva_pci_alloc_consistent(pdev,
 367                                                                    PAGE_SIZE,
 368                                                                    &dma_handle,
 369                                                                    &addr_handle)))
 370                         {
 371                                 break;
 372                         }
 373                         diva_init_dma_map_entry(pmap, i, cpu_addr,
 374                                                 (dword) dma_handle,
 375                                                 addr_handle);
 376                         DBG_TRC(("dma map alloc [%d]=(%08lx:%08x:%08lx)",
 377                                  i, (unsigned long) cpu_addr,
 378                                  (dword) dma_handle,
 379                                  (unsigned long) addr_handle))}
 380         }
 381
 382         *ppmap = pmap;
 383 }
 384
 385 /*
 386   Free all contained in the map entries and memory used by the map
 387   Should be always called after adapter removal from DIDD array
 388   */
 389 void diva_free_dma_map(void *hdev, struct _diva_dma_map_entry *pmap)
 390 {
 391         struct pci_dev *pdev = (struct pci_dev *) hdev;
 392         int i;
 393         dword phys_addr;
 394         void *cpu_addr;
 395         dma_addr_t dma_handle;
 396         void *addr_handle;
 397
 398         for (i = 0; (pmap != 0); i++) {
 399                 diva_get_dma_map_entry(pmap, i, &cpu_addr, &phys_addr);
 400                 if (!cpu_addr) {
 401                         break;
 402                 }
 403                 addr_handle = diva_get_entry_handle(pmap, i);
 404                 dma_handle = (dma_addr_t) phys_addr;
 405                 pci_free_consistent(pdev, PAGE_SIZE, addr_handle,
 406                                     dma_handle);
 407                 DBG_TRC(("dma map free [%d]=(%08lx:%08x:%08lx)", i,
 408                          (unsigned long) cpu_addr, (dword) dma_handle,
 409                          (unsigned long) addr_handle))
 410         }
 411
 412         diva_free_dma_mapping(pmap);
 413 }
 414
 415
 416 /*********************************************************
 417  ** I/O port utilities
 418  *********************************************************/
 419
 420 int
 421 diva_os_register_io_port(void *adapter, int on, unsigned long port,
 422                          unsigned long length, const char *name, int id)
 423 {
 424         if (on) {
 425                 if (!request_region(port, length, name)) {
 426                         DBG_ERR(("A: I/O: can't register port=%08x", port))
 427                         return (-1);
 428                 }
 429         } else {
 430                 release_region(port, length);
 431         }
 432         return (0);
 433 }
 434
 435 void __iomem *divasa_remap_pci_bar(diva_os_xdi_adapter_t *a, int id, unsigned long bar, unsigned long area_length)
 436 {
 437         void __iomem *ret = ioremap(bar, area_length);
 438         DBG_TRC(("remap(%08x)->%p", bar, ret));
 439         return (ret);
 440 }
 441
 442 void divasa_unmap_pci_bar(void __iomem *bar)
 443 {
 444         if (bar) {
 445                 iounmap(bar);
 446         }
 447 }
 448
 449 /*********************************************************
 450  ** I/O port access
 451  *********************************************************/
 452 byte __inline__ inpp(void __iomem *addr)
 453 {
 454         return (inb((unsigned long) addr));
 455 }
 456
 457 word __inline__ inppw(void __iomem *addr)
 458 {
 459         return (inw((unsigned long) addr));
 460 }
 461
 462 void __inline__ inppw_buffer(void __iomem *addr, void *P, int length)
 463 {
 464         insw((unsigned long) addr, (word *) P, length >> 1);
 465 }
 466
 467 void __inline__ outppw_buffer(void __iomem *addr, void *P, int length)
 468 {
 469         outsw((unsigned long) addr, (word *) P, length >> 1);
 470 }
 471
 472 void __inline__ outppw(void __iomem *addr, word w)
 473 {
 474         outw(w, (unsigned long) addr);
 475 }
 476
 477 void __inline__ outpp(void __iomem *addr, word p)
 478 {
 479         outb(p, (unsigned long) addr);
 480 }
 481
 482 /* --------------------------------------------------------------------------
 483     IRQ request / remove
 484    -------------------------------------------------------------------------- */
 485 int diva_os_register_irq(void *context, byte irq, const char *name)
 486 {
 487         int result = request_irq(irq, diva_os_irq_wrapper,
 488                                  IRQF_DISABLED | IRQF_SHARED, name, context);
 489         return (result);
 490 }
 491
 492 void diva_os_remove_irq(void *context, byte irq)
 493 {
 494         free_irq(irq, context);
 495 }
 496
 497 /* --------------------------------------------------------------------------
 498     DPC framework implementation
 499    -------------------------------------------------------------------------- */
 500 static void diva_os_dpc_proc(unsigned long context)
 501 {
 502         diva_os_thread_dpc_t *psoft_isr = (diva_os_thread_dpc_t *) context;
 503         diva_os_soft_isr_t *pisr = psoft_isr->psoft_isr;
 504
 505         (*(pisr->callback)) (pisr, pisr->callback_context);
 506 }
 507
 508 int diva_os_initialize_soft_isr(diva_os_soft_isr_t * psoft_isr,
 509                                 diva_os_soft_isr_callback_t callback,
 510                                 void *callback_context)
 511 {
 512         diva_os_thread_dpc_t *pdpc;
 513
 514         pdpc = (diva_os_thread_dpc_t *) diva_os_malloc(0, sizeof(*pdpc));
 515         if (!(psoft_isr->object = pdpc)) {
 516                 return (-1);
 517         }
 518         memset(pdpc, 0x00, sizeof(*pdpc));
 519         psoft_isr->callback = callback;
 520         psoft_isr->callback_context = callback_context;
 521         pdpc->psoft_isr = psoft_isr;
 522         tasklet_init(&pdpc->divas_task, diva_os_dpc_proc, (unsigned long)pdpc);
 523
 524         return (0);
 525 }
 526
 527 int diva_os_schedule_soft_isr(diva_os_soft_isr_t * psoft_isr)
 528 {
 529         if (psoft_isr && psoft_isr->object) {
 530                 diva_os_thread_dpc_t *pdpc =
 531                     (diva_os_thread_dpc_t *) psoft_isr->object;
 532
 533                 tasklet_schedule(&pdpc->divas_task);
 534         }
 535
 536         return (1);
 537 }
 538
 539 int diva_os_cancel_soft_isr(diva_os_soft_isr_t * psoft_isr)
 540 {
 541         return (0);
 542 }
 543
 544 void diva_os_remove_soft_isr(diva_os_soft_isr_t * psoft_isr)
 545 {
 546         if (psoft_isr && psoft_isr->object) {
 547                 diva_os_thread_dpc_t *pdpc =
 548                     (diva_os_thread_dpc_t *) psoft_isr->object;
 549                 void *mem;
 550
 551                 tasklet_kill(&pdpc->divas_task);
 552                 flush_scheduled_work();
 553                 mem = psoft_isr->object;
 554                 psoft_isr->object = NULL;
 555                 diva_os_free(0, mem);
 556         }
 557 }
 558
 559 /*
 560  * kernel/user space copy functions
 561  */
 562 static int
 563 xdi_copy_to_user(void *os_handle, void __user *dst, const void *src, int length)
 564 {
 565         if (copy_to_user(dst, src, length)) {
 566                 return (-EFAULT);
 567         }
 568         return (length);
 569 }
 570
 571 static int
 572 xdi_copy_from_user(void *os_handle, void *dst, const void __user *src, int length)
 573 {
 574         if (copy_from_user(dst, src, length)) {
 575                 return (-EFAULT);
 576         }
 577         return (length);
 578 }
 579
 580 /*
 581  * device node operations
 582  */
 583 static int divas_open(struct inode *inode, struct file *file)
 584 {
 585         return (0);
 586 }
 587
 588 static int divas_release(struct inode *inode, struct file *file)
 589 {
 590         if (file->private_data) {
 591                 diva_xdi_close_adapter(file->private_data, file);
 592         }
 593         return (0);
 594 }
 595
 596 static ssize_t divas_write(struct file *file, const char __user *buf,
 597                            size_t count, loff_t * ppos)
 598 {
 599         int ret = -EINVAL;
 600
 601         if (!file->private_data) {
 602                 file->private_data = diva_xdi_open_adapter(file, buf,
 603                                                            count,
 604                                                            xdi_copy_from_user);
 605         }
 606         if (!file->private_data) {
 607                 return (-ENODEV);
 608         }
 609
 610         ret = diva_xdi_write(file->private_data, file,
 611                              buf, count, xdi_copy_from_user);
 612         switch (ret) {
 613         case -1:                /* Message should be removed from rx mailbox first */
 614                 ret = -EBUSY;
 615                 break;
 616         case -2:                /* invalid adapter was specified in this call */
 617                 ret = -ENOMEM;
 618                 break;
 619         case -3:
 620                 ret = -ENXIO;
 621                 break;
 622         }
 623         DBG_TRC(("write: ret %d", ret));
 624         return (ret);
 625 }
 626
 627 static ssize_t divas_read(struct file *file, char __user *buf,
 628                           size_t count, loff_t * ppos)
 629 {
 630         int ret = -EINVAL;
 631
 632         if (!file->private_data) {
 633                 file->private_data = diva_xdi_open_adapter(file, buf,
 634                                                            count,
 635                                                            xdi_copy_from_user);
 636         }
 637         if (!file->private_data) {
 638                 return (-ENODEV);
 639         }
 640
 641         ret = diva_xdi_read(file->private_data, file,
 642                             buf, count, xdi_copy_to_user);
 643         switch (ret) {
 644         case -1:                /* RX mailbox is empty */
 645                 ret = -EAGAIN;
 646                 break;
 647         case -2:                /* no memory, mailbox was cleared, last command is failed */
 648                 ret = -ENOMEM;
 649                 break;
 650         case -3:                /* can't copy to user, retry */
 651                 ret = -EFAULT;
 652                 break;
 653         }
 654         DBG_TRC(("read: ret %d", ret));
 655         return (ret);
 656 }
 657
 658 static unsigned int divas_poll(struct file *file, poll_table * wait)
 659 {
 660         if (!file->private_data) {
 661                 return (POLLERR);
 662         }
 663         return (POLLIN | POLLRDNORM);
 664 }
 665
 666 static struct file_operations divas_fops = {
 667         .owner   = THIS_MODULE,
 668         .llseek  = no_llseek,
 669         .read    = divas_read,
 670         .write   = divas_write,
 671         .poll    = divas_poll,
 672         .open    = divas_open,
 673         .release = divas_release
 674 };
 675
 676 static void divas_unregister_chrdev(void)
 677 {
 678         unregister_chrdev(major, DEVNAME);
 679 }
 680
 681 static int DIVA_INIT_FUNCTION divas_register_chrdev(void)
 682 {
 683         if ((major = register_chrdev(0, DEVNAME, &divas_fops)) < 0)
 684         {
 685                 printk(KERN_ERR "%s: failed to create /dev entry.\n",
 686                        DRIVERLNAME);
 687                 return (0);
 688         }
 689
 690         return (1);
 691 }
 692
 693 /* --------------------------------------------------------------------------
 694     PCI driver section
 695    -------------------------------------------------------------------------- */
 696 static int __devinit divas_init_one(struct pci_dev *pdev,
 697                                     const struct pci_device_id *ent)
 698 {
 699         void *pdiva = NULL;
 700         u8 pci_latency;
 701         u8 new_latency = 32;
 702
 703         DBG_TRC(("%s bus: %08x fn: %08x insertion.\n",
 704                  CardProperties[ent->driver_data].Name,
 705                  pdev->bus->number, pdev->devfn))
 706         printk(KERN_INFO "%s: %s bus: %08x fn: %08x insertion.\n",
 707                 DRIVERLNAME, CardProperties[ent->driver_data].Name,
 708                 pdev->bus->number, pdev->devfn);
 709
 710         if (pci_enable_device(pdev)) {
 711                 DBG_TRC(("%s: %s bus: %08x fn: %08x device init failed.\n",
 712                          DRIVERLNAME,
 713                          CardProperties[ent->driver_data].Name,
 714                          pdev->bus->number,
 715                          pdev->devfn))
 716                 printk(KERN_ERR
 717                         "%s: %s bus: %08x fn: %08x device init failed.\n",
 718                         DRIVERLNAME,
 719                         CardProperties[ent->driver_data].
 720                         Name, pdev->bus->number,
 721                         pdev->devfn);
 722                 return (-EIO);
 723         }
 724
 725         pci_set_master(pdev);
 726
 727         pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
 728         if (!pci_latency) {
 729                 DBG_TRC(("%s: bus: %08x fn: %08x fix latency.\n",
 730                          DRIVERLNAME, pdev->bus->number, pdev->devfn))
 731                 printk(KERN_INFO
 732                         "%s: bus: %08x fn: %08x fix latency.\n",
 733                          DRIVERLNAME, pdev->bus->number, pdev->devfn);
 734                 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, new_latency);
 735         }
 736
 737         if (!(pdiva = diva_driver_add_card(pdev, ent->driver_data))) {
 738                 DBG_TRC(("%s: %s bus: %08x fn: %08x card init failed.\n",
 739                          DRIVERLNAME,
 740                          CardProperties[ent->driver_data].Name,
 741                          pdev->bus->number,
 742                          pdev->devfn))
 743                 printk(KERN_ERR
 744                         "%s: %s bus: %08x fn: %08x card init failed.\n",
 745                         DRIVERLNAME,
 746                         CardProperties[ent->driver_data].
 747                         Name, pdev->bus->number,
 748                         pdev->devfn);
 749                 return (-EIO);
 750         }
 751
 752         pci_set_drvdata(pdev, pdiva);
 753
 754         return (0);
 755 }
 756
 757 static void __devexit divas_remove_one(struct pci_dev *pdev)
 758 {
 759         void *pdiva = pci_get_drvdata(pdev);
 760
 761         DBG_TRC(("bus: %08x fn: %08x removal.\n",
 762                  pdev->bus->number, pdev->devfn))
 763         printk(KERN_INFO "%s: bus: %08x fn: %08x removal.\n",
 764                 DRIVERLNAME, pdev->bus->number, pdev->devfn);
 765
 766         if (pdiva) {
 767                 diva_driver_remove_card(pdiva);
 768         }
 769
 770 }
 771
 772 /* --------------------------------------------------------------------------
 773     Driver Load / Startup
 774    -------------------------------------------------------------------------- */
 775 static int DIVA_INIT_FUNCTION divas_init(void)
 776 {
 777         char tmprev[50];
 778         int ret = 0;
 779
 780         printk(KERN_INFO "%s\n", DRIVERNAME);
 781         printk(KERN_INFO "%s: Rel:%s  Rev:", DRIVERLNAME, DRIVERRELEASE_DIVAS);
 782         strcpy(tmprev, main_revision);
 783         printk("%s  Build: %s(%s)\n", getrev(tmprev),
 784                diva_xdi_common_code_build, DIVA_BUILD);
 785         printk(KERN_INFO "%s: support for: ", DRIVERLNAME);
 786 #ifdef CONFIG_ISDN_DIVAS_BRIPCI
 787         printk("BRI/PCI ");
 788 #endif
 789 #ifdef CONFIG_ISDN_DIVAS_PRIPCI
 790         printk("PRI/PCI ");
 791 #endif
 792         printk("adapters\n");
 793
 794         if (!divasfunc_init(dbgmask)) {
 795                 printk(KERN_ERR "%s: failed to connect to DIDD.\n",
 796                        DRIVERLNAME);
 797                 ret = -EIO;
 798                 goto out;
 799         }
 800
 801         if (!divas_register_chrdev()) {
 802 #ifdef MODULE
 803                 divasfunc_exit();
 804 #endif
 805                 ret = -EIO;
 806                 goto out;
 807         }
 808
 809         if (!create_divas_proc()) {
 810 #ifdef MODULE
 811                 remove_divas_proc();
 812                 divas_unregister_chrdev();
 813                 divasfunc_exit();
 814 #endif
 815                 printk(KERN_ERR "%s: failed to create proc entry.\n",
 816                        DRIVERLNAME);
 817                 ret = -EIO;
 818                 goto out;
 819         }
 820
 821         if ((ret = pci_register_driver(&diva_pci_driver))) {
 822 #ifdef MODULE
 823                 remove_divas_proc();
 824                 divas_unregister_chrdev();
 825                 divasfunc_exit();
 826 #endif
 827                 printk(KERN_ERR "%s: failed to init pci driver.\n",
 828                        DRIVERLNAME);
 829                 goto out;
 830         }
 831         printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
 832
 833       out:
 834         return (ret);
 835 }
 836
 837 /* --------------------------------------------------------------------------
 838     Driver Unload
 839    -------------------------------------------------------------------------- */
 840 static void DIVA_EXIT_FUNCTION divas_exit(void)
 841 {
 842         pci_unregister_driver(&diva_pci_driver);
 843         remove_divas_proc();
 844         divas_unregister_chrdev();
 845         divasfunc_exit();
 846
 847         printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
 848 }
 849
 850 module_init(divas_init);
 851 module_exit(divas_exit);