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 <asm/uaccess.h>
  16 #include <asm/io.h>
  17 #include <linux/ioport.h>
  18 #include <linux/workqueue.h>
  19 #include <linux/pci.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/list.h>
  22 #include <linux/poll.h>
  23 #include <linux/kmod.h>
  24 #include <linux/smp_lock.h>
  25
  26 #include "platform.h"
  27 #undef ID_MASK
  28 #undef N_DATA
  29 #include "pc.h"
  30 #include "di_defs.h"
  31 #include "divasync.h"
  32 #include "diva.h"
  33 #include "di.h"
  34 #include "io.h"
  35 #include "xdi_msg.h"
  36 #include "xdi_adapter.h"
  37 #include "xdi_vers.h"
  38 #include "diva_dma.h"
  39 #include "diva_pci.h"
  40
  41 static char *main_revision = "$Revision: 1.55.4.6 $";
  42
  43 static int major;
  44
  45 static int dbgmask;
  46
  47 MODULE_DESCRIPTION("Kernel driver for Eicon DIVA Server cards");
  48 MODULE_AUTHOR("Cytronics & Melware, Eicon Networks");
  49 MODULE_LICENSE("GPL");
  50
  51 module_param(dbgmask, int, 0);
  52 MODULE_PARM_DESC(dbgmask, "initial debug mask");
  53
  54 static char *DRIVERNAME =
  55     "Eicon DIVA Server driver (http://www.melware.net)";
  56 static char *DRIVERLNAME = "divas";
  57 static char *DEVNAME = "Divas";
  58 char *DRIVERRELEASE_DIVAS = "2.0";
  59
  60 extern irqreturn_t diva_os_irq_wrapper(int irq, void *context);
  61 extern int create_divas_proc(void);
  62 extern void remove_divas_proc(void);
  63 extern void diva_get_vserial_number(PISDN_ADAPTER IoAdapter, char *buf);
  64 extern int divasfunc_init(int dbgmask);
  65 extern void divasfunc_exit(void);
  66
  67 typedef struct _diva_os_thread_dpc {
  68         struct tasklet_struct divas_task;
  69         diva_os_soft_isr_t *psoft_isr;
  70 } diva_os_thread_dpc_t;
  71
  72 /* --------------------------------------------------------------------------
  73     PCI driver interface section
  74    -------------------------------------------------------------------------- */
  75 /*
  76   vendor, device        Vendor and device ID to match (or PCI_ANY_ID)
  77   subvendor,    Subsystem vendor and device ID to match (or PCI_ANY_ID)
  78   subdevice
  79   class,                Device class to match. The class_mask tells which bits
  80   class_mask    of the class are honored during the comparison.
  81   driver_data   Data private to the driver.
  82   */
  83
  84 #if !defined(PCI_DEVICE_ID_EICON_MAESTRAP_2)
  85 #define PCI_DEVICE_ID_EICON_MAESTRAP_2       0xE015
  86 #endif
  87
  88 #if !defined(PCI_DEVICE_ID_EICON_4BRI_VOIP)
  89 #define PCI_DEVICE_ID_EICON_4BRI_VOIP        0xE016
  90 #endif
  91
  92 #if !defined(PCI_DEVICE_ID_EICON_4BRI_2_VOIP)
  93 #define PCI_DEVICE_ID_EICON_4BRI_2_VOIP      0xE017
  94 #endif
  95
  96 #if !defined(PCI_DEVICE_ID_EICON_BRI2M_2)
  97 #define PCI_DEVICE_ID_EICON_BRI2M_2          0xE018
  98 #endif
  99
 100 #if !defined(PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP)
 101 #define PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP  0xE019
 102 #endif
 103
 104 #if !defined(PCI_DEVICE_ID_EICON_2F)
 105 #define PCI_DEVICE_ID_EICON_2F               0xE01A
 106 #endif
 107
 108 #if !defined(PCI_DEVICE_ID_EICON_BRI2M_2_VOIP)
 109 #define PCI_DEVICE_ID_EICON_BRI2M_2_VOIP     0xE01B
 110 #endif
 111
 112 /*
 113   This table should be sorted by PCI device ID
 114   */
 115 static struct pci_device_id divas_pci_tbl[] = {
 116 /* Diva Server BRI-2M PCI 0xE010 */
 117         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRA,
 118          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_MAESTRA_PCI},
 119 /* Diva Server 4BRI-8M PCI 0xE012 */
 120         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAQ,
 121          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_Q_8M_PCI},
 122 /* Diva Server 4BRI-8M 2.0 PCI 0xE013 */
 123         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAQ_U,
 124          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_Q_8M_V2_PCI},
 125 /* Diva Server PRI-30M PCI 0xE014 */
 126         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAP,
 127          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_P_30M_PCI},
 128 /* Diva Server PRI 2.0 adapter 0xE015 */
 129         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAP_2,
 130          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_P_30M_V2_PCI},
 131 /* Diva Server Voice 4BRI-8M PCI 0xE016 */
 132         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_4BRI_VOIP,
 133          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_VOICE_Q_8M_PCI},
 134 /* Diva Server Voice 4BRI-8M 2.0 PCI 0xE017 */
 135         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_4BRI_2_VOIP,
 136          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_VOICE_Q_8M_V2_PCI},
 137 /* Diva Server BRI-2M 2.0 PCI 0xE018 */
 138         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_BRI2M_2,
 139          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_B_2M_V2_PCI},
 140 /* Diva Server Voice PRI 2.0 PCI 0xE019 */
 141         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_MAESTRAP_2_VOIP,
 142          PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 143          CARDTYPE_DIVASRV_VOICE_P_30M_V2_PCI},
 144 /* Diva Server 2FX 0xE01A */
 145         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_2F,
 146          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_B_2F_PCI},
 147 /* Diva Server Voice BRI-2M 2.0 PCI 0xE01B */
 148         {PCI_VENDOR_ID_EICON, PCI_DEVICE_ID_EICON_BRI2M_2_VOIP,
 149          PCI_ANY_ID, PCI_ANY_ID, 0, 0, CARDTYPE_DIVASRV_VOICE_B_2M_V2_PCI},
 150         {0,}                    /* 0 terminated list. */
 151 };
 152 MODULE_DEVICE_TABLE(pci, divas_pci_tbl);
 153
 154 static int divas_init_one(struct pci_dev *pdev,
 155                           const struct pci_device_id *ent);
 156 static void __devexit divas_remove_one(struct pci_dev *pdev);
 157
 158 static struct pci_driver diva_pci_driver = {
 159         .name     = "divas",
 160         .probe    = divas_init_one,
 161         .remove   = __devexit_p(divas_remove_one),
 162         .id_table = divas_pci_tbl,
 163 };
 164
 165 /*********************************************************
 166  ** little helper functions
 167  *********************************************************/
 168 static char *getrev(const char *revision)
 169 {
 170         char *rev;
 171         char *p;
 172         if ((p = strchr(revision, ':'))) {
 173                 rev = p + 2;
 174                 p = strchr(rev, '$');
 175                 *--p = 0;
 176         } else
 177                 rev = "1.0";
 178         return rev;
 179 }
 180
 181 void diva_log_info(unsigned char *format, ...)
 182 {
 183         va_list args;
 184         unsigned char line[160];
 185
 186         va_start(args, format);
 187         vsnprintf(line, sizeof(line), format, args);
 188         va_end(args);
 189
 190         printk(KERN_INFO "%s: %s\n", DRIVERLNAME, line);
 191 }
 192
 193 void divas_get_version(char *p)
 194 {
 195         char tmprev[32];
 196
 197         strcpy(tmprev, main_revision);
 198         sprintf(p, "%s: %s(%s) %s(%s) major=%d\n", DRIVERLNAME, DRIVERRELEASE_DIVAS,
 199                 getrev(tmprev), diva_xdi_common_code_build, DIVA_BUILD, major);
 200 }
 201
 202 /* --------------------------------------------------------------------------
 203     PCI Bus services
 204    -------------------------------------------------------------------------- */
 205 byte diva_os_get_pci_bus(void *pci_dev_handle)
 206 {
 207         struct pci_dev *pdev = (struct pci_dev *) pci_dev_handle;
 208         return ((byte) pdev->bus->number);
 209 }
 210
 211 byte diva_os_get_pci_func(void *pci_dev_handle)
 212 {
 213         struct pci_dev *pdev = (struct pci_dev *) pci_dev_handle;
 214         return ((byte) pdev->devfn);
 215 }
 216
 217 unsigned long divasa_get_pci_irq(unsigned char bus, unsigned char func,
 218                                  void *pci_dev_handle)
 219 {
 220         unsigned char irq = 0;
 221         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 222
 223         irq = dev->irq;
 224
 225         return ((unsigned long) irq);
 226 }
 227
 228 unsigned long divasa_get_pci_bar(unsigned char bus, unsigned char func,
 229                                  int bar, void *pci_dev_handle)
 230 {
 231         unsigned long ret = 0;
 232         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 233
 234         if (bar < 6) {
 235                 ret = dev->resource[bar].start;
 236         }
 237
 238         DBG_TRC(("GOT BAR[%d]=%08x", bar, ret));
 239
 240         {
 241                 unsigned long type = (ret & 0x00000001);
 242                 if (type & PCI_BASE_ADDRESS_SPACE_IO) {
 243                         DBG_TRC(("  I/O"));
 244                         ret &= PCI_BASE_ADDRESS_IO_MASK;
 245                 } else {
 246                         DBG_TRC(("  memory"));
 247                         ret &= PCI_BASE_ADDRESS_MEM_MASK;
 248                 }
 249                 DBG_TRC(("  final=%08x", ret));
 250         }
 251
 252         return (ret);
 253 }
 254
 255 void PCIwrite(byte bus, byte func, int offset, void *data, int length,
 256               void *pci_dev_handle)
 257 {
 258         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 259
 260         switch (length) {
 261         case 1:         /* byte */
 262                 pci_write_config_byte(dev, offset,
 263                                       *(unsigned char *) data);
 264                 break;
 265         case 2:         /* word */
 266                 pci_write_config_word(dev, offset,
 267                                       *(unsigned short *) data);
 268                 break;
 269         case 4:         /* dword */
 270                 pci_write_config_dword(dev, offset,
 271                                        *(unsigned int *) data);
 272                 break;
 273
 274         default:                /* buffer */
 275                 if (!(length % 4) && !(length & 0x03)) {        /* Copy as dword */
 276                         dword *p = (dword *) data;
 277                         length /= 4;
 278
 279                         while (length--) {
 280                                 pci_write_config_dword(dev, offset,
 281                                                        *(unsigned int *)
 282                                                        p++);
 283                         }
 284                 } else {        /* copy as byte stream */
 285                         byte *p = (byte *) data;
 286
 287                         while (length--) {
 288                                 pci_write_config_byte(dev, offset,
 289                                                       *(unsigned char *)
 290                                                       p++);
 291                         }
 292                 }
 293         }
 294 }
 295
 296 void PCIread(byte bus, byte func, int offset, void *data, int length,
 297              void *pci_dev_handle)
 298 {
 299         struct pci_dev *dev = (struct pci_dev *) pci_dev_handle;
 300
 301         switch (length) {
 302         case 1:         /* byte */
 303                 pci_read_config_byte(dev, offset, (unsigned char *) data);
 304                 break;
 305         case 2:         /* word */
 306                 pci_read_config_word(dev, offset, (unsigned short *) data);
 307                 break;
 308         case 4:         /* dword */
 309                 pci_read_config_dword(dev, offset, (unsigned int *) data);
 310                 break;
 311
 312         default:                /* buffer */
 313                 if (!(length % 4) && !(length & 0x03)) {        /* Copy as dword */
 314                         dword *p = (dword *) data;
 315                         length /= 4;
 316
 317                         while (length--) {
 318                                 pci_read_config_dword(dev, offset,
 319                                                       (unsigned int *)
 320                                                       p++);
 321                         }
 322                 } else {        /* copy as byte stream */
 323                         byte *p = (byte *) data;
 324
 325                         while (length--) {
 326                                 pci_read_config_byte(dev, offset,
 327                                                      (unsigned char *)
 328                                                      p++);
 329                         }
 330                 }
 331         }
 332 }
 333
 334 /*
 335   Init map with DMA pages. It is not problem if some allocations fail -
 336   the channels that will not get one DMA page will use standard PIO
 337   interface
 338   */
 339 static void *diva_pci_alloc_consistent(struct pci_dev *hwdev,
 340                                        size_t size,
 341                                        dma_addr_t * dma_handle,
 342                                        void **addr_handle)
 343 {
 344         void *addr = pci_alloc_consistent(hwdev, size, dma_handle);
 345
 346         *addr_handle = addr;
 347
 348         return (addr);
 349 }
 350
 351 void diva_init_dma_map(void *hdev,
 352                        struct _diva_dma_map_entry **ppmap, int nentries)
 353 {
 354         struct pci_dev *pdev = (struct pci_dev *) hdev;
 355         struct _diva_dma_map_entry *pmap =
 356             diva_alloc_dma_map(hdev, nentries);
 357
 358         if (pmap) {
 359                 int i;
 360                 dma_addr_t dma_handle;
 361                 void *cpu_addr;
 362                 void *addr_handle;
 363
 364                 for (i = 0; i < nentries; i++) {
 365                         if (!(cpu_addr = diva_pci_alloc_consistent(pdev,
 366                                                                    PAGE_SIZE,
 367                                                                    &dma_handle,
 368                                                                    &addr_handle)))
 369                         {
 370                                 break;
 371                         }
 372                         diva_init_dma_map_entry(pmap, i, cpu_addr,
 373                                                 (dword) dma_handle,
 374                                                 addr_handle);
 375                         DBG_TRC(("dma map alloc [%d]=(%08lx:%08x:%08lx)",
 376                                  i, (unsigned long) cpu_addr,
 377                                  (dword) dma_handle,
 378                                  (unsigned long) addr_handle))}
 379         }
 380
 381         *ppmap = pmap;
 382 }
 383
 384 /*
 385   Free all contained in the map entries and memory used by the map
 386   Should be always called after adapter removal from DIDD array
 387   */
 388 void diva_free_dma_map(void *hdev, struct _diva_dma_map_entry *pmap)
 389 {
 390         struct pci_dev *pdev = (struct pci_dev *) hdev;
 391         int i;
 392         dword phys_addr;
 393         void *cpu_addr;
 394         dma_addr_t dma_handle;
 395         void *addr_handle;
 396
 397         for (i = 0; (pmap != NULL); i++) {
 398                 diva_get_dma_map_entry(pmap, i, &cpu_addr, &phys_addr);
 399                 if (!cpu_addr) {
 400                         break;
 401                 }
 402                 addr_handle = diva_get_entry_handle(pmap, i);
 403                 dma_handle = (dma_addr_t) phys_addr;
 404                 pci_free_consistent(pdev, PAGE_SIZE, addr_handle,
 405                                     dma_handle);
 406                 DBG_TRC(("dma map free [%d]=(%08lx:%08x:%08lx)", i,
 407                          (unsigned long) cpu_addr, (dword) dma_handle,
 408                          (unsigned long) addr_handle))
 409         }
 410
 411         diva_free_dma_mapping(pmap);
 412 }
 413
 414
 415 /*********************************************************
 416  ** I/O port utilities
 417  *********************************************************/
 418
 419 int
 420 diva_os_register_io_port(void *adapter, int on, unsigned long port,
 421                          unsigned long length, const char *name, int id)
 422 {
 423         if (on) {
 424                 if (!request_region(port, length, name)) {
 425                         DBG_ERR(("A: I/O: can't register port=%08x", port))
 426                         return (-1);
 427                 }
 428         } else {
 429                 release_region(port, length);
 430         }
 431         return (0);
 432 }
 433
 434 void __iomem *divasa_remap_pci_bar(diva_os_xdi_adapter_t *a, int id, unsigned long bar, unsigned long area_length)
 435 {
 436         void __iomem *ret = ioremap(bar, area_length);
 437         DBG_TRC(("remap(%08x)->%p", bar, ret));
 438         return (ret);
 439 }
 440
 441 void divasa_unmap_pci_bar(void __iomem *bar)
 442 {
 443         if (bar) {
 444                 iounmap(bar);
 445         }
 446 }
 447
 448 /*********************************************************
 449  ** I/O port access
 450  *********************************************************/
 451 byte __inline__ inpp(void __iomem *addr)
 452 {
 453         return (inb((unsigned long) addr));
 454 }
 455
 456 word __inline__ inppw(void __iomem *addr)
 457 {
 458         return (inw((unsigned long) addr));
 459 }
 460
 461 void __inline__ inppw_buffer(void __iomem *addr, void *P, int length)
 462 {
 463         insw((unsigned long) addr, (word *) P, length >> 1);
 464 }
 465
 466 void __inline__ outppw_buffer(void __iomem *addr, void *P, int length)
 467 {
 468         outsw((unsigned long) addr, (word *) P, length >> 1);
 469 }
 470
 471 void __inline__ outppw(void __iomem *addr, word w)
 472 {
 473         outw(w, (unsigned long) addr);
 474 }
 475
 476 void __inline__ outpp(void __iomem *addr, word p)
 477 {
 478         outb(p, (unsigned long) addr);
 479 }
 480
 481 /* --------------------------------------------------------------------------
 482     IRQ request / remove
 483    -------------------------------------------------------------------------- */
 484 int diva_os_register_irq(void *context, byte irq, const char *name)
 485 {
 486         int result = request_irq(irq, diva_os_irq_wrapper,
 487                                  IRQF_DISABLED | IRQF_SHARED, name, context);
 488         return (result);
 489 }
 490
 491 void diva_os_remove_irq(void *context, byte irq)
 492 {
 493         free_irq(irq, context);
 494 }
 495
 496 /* --------------------------------------------------------------------------
 497     DPC framework implementation
 498    -------------------------------------------------------------------------- */
 499 static void diva_os_dpc_proc(unsigned long context)
 500 {
 501         diva_os_thread_dpc_t *psoft_isr = (diva_os_thread_dpc_t *) context;
 502         diva_os_soft_isr_t *pisr = psoft_isr->psoft_isr;
 503
 504         (*(pisr->callback)) (pisr, pisr->callback_context);
 505 }
 506
 507 int diva_os_initialize_soft_isr(diva_os_soft_isr_t * psoft_isr,
 508                                 diva_os_soft_isr_callback_t callback,
 509                                 void *callback_context)
 510 {
 511         diva_os_thread_dpc_t *pdpc;
 512
 513         pdpc = (diva_os_thread_dpc_t *) diva_os_malloc(0, sizeof(*pdpc));
 514         if (!(psoft_isr->object = pdpc)) {
 515                 return (-1);
 516         }
 517         memset(pdpc, 0x00, sizeof(*pdpc));
 518         psoft_isr->callback = callback;
 519         psoft_isr->callback_context = callback_context;
 520         pdpc->psoft_isr = psoft_isr;
 521         tasklet_init(&pdpc->divas_task, diva_os_dpc_proc, (unsigned long)pdpc);
 522
 523         return (0);
 524 }
 525
 526 int diva_os_schedule_soft_isr(diva_os_soft_isr_t * psoft_isr)
 527 {
 528         if (psoft_isr && psoft_isr->object) {
 529                 diva_os_thread_dpc_t *pdpc =
 530                     (diva_os_thread_dpc_t *) psoft_isr->object;
 531
 532                 tasklet_schedule(&pdpc->divas_task);
 533         }
 534
 535         return (1);
 536 }
 537
 538 int diva_os_cancel_soft_isr(diva_os_soft_isr_t * psoft_isr)
 539 {
 540         return (0);
 541 }
 542
 543 void diva_os_remove_soft_isr(diva_os_soft_isr_t * psoft_isr)
 544 {
 545         if (psoft_isr && psoft_isr->object) {
 546                 diva_os_thread_dpc_t *pdpc =
 547                     (diva_os_thread_dpc_t *) psoft_isr->object;
 548                 void *mem;
 549
 550                 tasklet_kill(&pdpc->divas_task);
 551                 flush_scheduled_work();
 552                 mem = psoft_isr->object;
 553                 psoft_isr->object = NULL;
 554                 diva_os_free(0, mem);
 555         }
 556 }
 557
 558 /*
 559  * kernel/user space copy functions
 560  */
 561 static int
 562 xdi_copy_to_user(void *os_handle, void __user *dst, const void *src, int length)
 563 {
 564         if (copy_to_user(dst, src, length)) {
 565                 return (-EFAULT);
 566         }
 567         return (length);
 568 }
 569
 570 static int
 571 xdi_copy_from_user(void *os_handle, void *dst, const void __user *src, int length)
 572 {
 573         if (copy_from_user(dst, src, length)) {
 574                 return (-EFAULT);
 575         }
 576         return (length);
 577 }
 578
 579 /*
 580  * device node operations
 581  */
 582 static int divas_open(struct inode *inode, struct file *file)
 583 {
 584         cycle_kernel_lock();
 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 const 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                 divas_unregister_chrdev();
 812                 divasfunc_exit();
 813 #endif
 814                 printk(KERN_ERR "%s: failed to create proc entry.\n",
 815                        DRIVERLNAME);
 816                 ret = -EIO;
 817                 goto out;
 818         }
 819
 820         if ((ret = pci_register_driver(&diva_pci_driver))) {
 821 #ifdef MODULE
 822                 remove_divas_proc();
 823                 divas_unregister_chrdev();
 824                 divasfunc_exit();
 825 #endif
 826                 printk(KERN_ERR "%s: failed to init pci driver.\n",
 827                        DRIVERLNAME);
 828                 goto out;
 829         }
 830         printk(KERN_INFO "%s: started with major %d\n", DRIVERLNAME, major);
 831
 832       out:
 833         return (ret);
 834 }
 835
 836 /* --------------------------------------------------------------------------
 837     Driver Unload
 838    -------------------------------------------------------------------------- */
 839 static void DIVA_EXIT_FUNCTION divas_exit(void)
 840 {
 841         pci_unregister_driver(&diva_pci_driver);
 842         remove_divas_proc();
 843         divas_unregister_chrdev();
 844         divasfunc_exit();
 845
 846         printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME);
 847 }
 848
 849 module_init(divas_init);
 850 module_exit(divas_exit);