Linux/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);
851

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