1 /*
2 * Copyright 2003 Digi International (www.digi.com)
3 * Scott H Kilau <Scott_Kilau at digi dot com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
8 * any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
13 * PURPOSE. See the GNU General Public License for more details.
14 */
15
16
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/pci.h>
20 #include <linux/slab.h>
21 #include <linux/sched.h>
22 #include "dgnc_driver.h"
23 #include "dgnc_pci.h"
24 #include "dgnc_mgmt.h"
25 #include "dgnc_tty.h"
26 #include "dgnc_cls.h"
27 #include "dgnc_neo.h"
28 #include "dgnc_sysfs.h"
29
30 MODULE_LICENSE("GPL");
31 MODULE_AUTHOR("Digi International, http://www.digi.com");
32 MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");
33 MODULE_SUPPORTED_DEVICE("dgnc");
34
35 /**************************************************************************
36 *
37 * protos for this file
38 *
39 */
40 static int dgnc_start(void);
41 static int dgnc_finalize_board_init(struct dgnc_board *brd);
42 static void dgnc_init_globals(void);
43 static int dgnc_found_board(struct pci_dev *pdev, int id);
44 static void dgnc_cleanup_board(struct dgnc_board *brd);
45 static void dgnc_poll_handler(ulong dummy);
46 static int dgnc_init_one(struct pci_dev *pdev,
47 const struct pci_device_id *ent);
48 static void dgnc_do_remap(struct dgnc_board *brd);
49
50 /*
51 * File operations permitted on Control/Management major.
52 */
53 static const struct file_operations dgnc_BoardFops = {
54 .owner = THIS_MODULE,
55 .unlocked_ioctl = dgnc_mgmt_ioctl,
56 .open = dgnc_mgmt_open,
57 .release = dgnc_mgmt_close
58 };
59
60
61 /*
62 * Globals
63 */
64 uint dgnc_NumBoards;
65 struct dgnc_board *dgnc_Board[MAXBOARDS];
66 DEFINE_SPINLOCK(dgnc_global_lock);
67 uint dgnc_Major;
68 int dgnc_poll_tick = 20; /* Poll interval - 20 ms */
69
70 /*
71 * Static vars.
72 */
73 static struct class *dgnc_class;
74
75 /*
76 * Poller stuff
77 */
78 static DEFINE_SPINLOCK(dgnc_poll_lock); /* Poll scheduling lock */
79 static ulong dgnc_poll_time; /* Time of next poll */
80 static uint dgnc_poll_stop; /* Used to tell poller to stop */
81 static struct timer_list dgnc_poll_timer;
82
83
84 static const struct pci_device_id dgnc_pci_tbl[] = {
85 {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_4_DID), .driver_data = 0},
86 {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_4_422_DID), .driver_data = 1},
87 {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_8_DID), .driver_data = 2},
88 {PCI_DEVICE(DIGI_VID, PCI_DEVICE_CLASSIC_8_422_DID), .driver_data = 3},
89 {0,}
90 };
91 MODULE_DEVICE_TABLE(pci, dgnc_pci_tbl);
92
93 struct board_id {
94 unsigned char *name;
95 uint maxports;
96 unsigned int is_pci_express;
97 };
98
99 static struct board_id dgnc_Ids[] = {
100 { PCI_DEVICE_CLASSIC_4_PCI_NAME, 4, 0 },
101 { PCI_DEVICE_CLASSIC_4_422_PCI_NAME, 4, 0 },
102 { PCI_DEVICE_CLASSIC_8_PCI_NAME, 8, 0 },
103 { PCI_DEVICE_CLASSIC_8_422_PCI_NAME, 8, 0 },
104 { PCI_DEVICE_NEO_4_PCI_NAME, 4, 0 },
105 { PCI_DEVICE_NEO_8_PCI_NAME, 8, 0 },
106 { PCI_DEVICE_NEO_2DB9_PCI_NAME, 2, 0 },
107 { PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2, 0 },
108 { PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2, 0 },
109 { PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2, 0 },
110 { PCI_DEVICE_NEO_1_422_PCI_NAME, 1, 0 },
111 { PCI_DEVICE_NEO_1_422_485_PCI_NAME, 1, 0 },
112 { PCI_DEVICE_NEO_2_422_485_PCI_NAME, 2, 0 },
113 { PCI_DEVICE_NEO_EXPRESS_8_PCI_NAME, 8, 1 },
114 { PCI_DEVICE_NEO_EXPRESS_4_PCI_NAME, 4, 1 },
115 { PCI_DEVICE_NEO_EXPRESS_4RJ45_PCI_NAME, 4, 1 },
116 { PCI_DEVICE_NEO_EXPRESS_8RJ45_PCI_NAME, 8, 1 },
117 { NULL, 0, 0 }
118 };
119
120 static struct pci_driver dgnc_driver = {
121 .name = "dgnc",
122 .probe = dgnc_init_one,
123 .id_table = dgnc_pci_tbl,
124 };
125
126 /************************************************************************
127 *
128 * Driver load/unload functions
129 *
130 ************************************************************************/
131
132 /*
133 * dgnc_cleanup_module()
134 *
135 * Module unload. This is where it all ends.
136 */
dgnc_cleanup_module(void)137 static void dgnc_cleanup_module(void)
138 {
139 int i;
140 unsigned long flags;
141
142 spin_lock_irqsave(&dgnc_poll_lock, flags);
143 dgnc_poll_stop = 1;
144 spin_unlock_irqrestore(&dgnc_poll_lock, flags);
145
146 /* Turn off poller right away. */
147 del_timer_sync(&dgnc_poll_timer);
148
149 dgnc_remove_driver_sysfiles(&dgnc_driver);
150
151 device_destroy(dgnc_class, MKDEV(dgnc_Major, 0));
152 class_destroy(dgnc_class);
153 unregister_chrdev(dgnc_Major, "dgnc");
154
155 for (i = 0; i < dgnc_NumBoards; ++i) {
156 dgnc_remove_ports_sysfiles(dgnc_Board[i]);
157 dgnc_tty_uninit(dgnc_Board[i]);
158 dgnc_cleanup_board(dgnc_Board[i]);
159 }
160
161 dgnc_tty_post_uninit();
162
163 if (dgnc_NumBoards)
164 pci_unregister_driver(&dgnc_driver);
165 }
166
167 /*
168 * init_module()
169 *
170 * Module load. This is where it all starts.
171 */
dgnc_init_module(void)172 static int __init dgnc_init_module(void)
173 {
174 int rc = 0;
175
176 /*
177 * Initialize global stuff
178 */
179 rc = dgnc_start();
180
181 if (rc < 0)
182 return rc;
183
184 /*
185 * Find and configure all the cards
186 */
187 rc = pci_register_driver(&dgnc_driver);
188
189 /*
190 * If something went wrong in the scan, bail out of driver.
191 */
192 if (rc < 0) {
193 /* Only unregister if it was actually registered. */
194 if (dgnc_NumBoards)
195 pci_unregister_driver(&dgnc_driver);
196 else
197 pr_warn("WARNING: dgnc driver load failed. No Digi Neo or Classic boards found.\n");
198
199 dgnc_cleanup_module();
200 } else {
201 dgnc_create_driver_sysfiles(&dgnc_driver);
202 }
203
204 return rc;
205 }
206
207 module_init(dgnc_init_module);
208 module_exit(dgnc_cleanup_module);
209
210 /*
211 * Start of driver.
212 */
dgnc_start(void)213 static int dgnc_start(void)
214 {
215 int rc = 0;
216 unsigned long flags;
217 struct device *dev;
218
219 /* make sure that the globals are init'd before we do anything else */
220 dgnc_init_globals();
221
222 /*
223 * Register our base character device into the kernel.
224 * This allows the download daemon to connect to the downld device
225 * before any of the boards are init'ed.
226 *
227 * Register management/dpa devices
228 */
229 rc = register_chrdev(0, "dgnc", &dgnc_BoardFops);
230 if (rc < 0) {
231 pr_err(DRVSTR ": Can't register dgnc driver device (%d)\n", rc);
232 return rc;
233 }
234 dgnc_Major = rc;
235
236 dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt");
237 if (IS_ERR(dgnc_class)) {
238 rc = PTR_ERR(dgnc_class);
239 pr_err(DRVSTR ": Can't create dgnc_mgmt class (%d)\n", rc);
240 goto failed_class;
241 }
242
243 dev = device_create(dgnc_class, NULL,
244 MKDEV(dgnc_Major, 0),
245 NULL, "dgnc_mgmt");
246 if (IS_ERR(dev)) {
247 rc = PTR_ERR(dev);
248 pr_err(DRVSTR ": Can't create device (%d)\n", rc);
249 goto failed_device;
250 }
251
252 /*
253 * Init any global tty stuff.
254 */
255 rc = dgnc_tty_preinit();
256
257 if (rc < 0) {
258 pr_err(DRVSTR ": tty preinit - not enough memory (%d)\n", rc);
259 goto failed_tty;
260 }
261
262 /* Start the poller */
263 spin_lock_irqsave(&dgnc_poll_lock, flags);
264 setup_timer(&dgnc_poll_timer, dgnc_poll_handler, 0);
265 dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick);
266 dgnc_poll_timer.expires = dgnc_poll_time;
267 spin_unlock_irqrestore(&dgnc_poll_lock, flags);
268
269 add_timer(&dgnc_poll_timer);
270
271 return 0;
272
273 failed_tty:
274 device_destroy(dgnc_class, MKDEV(dgnc_Major, 0));
275 failed_device:
276 class_destroy(dgnc_class);
277 failed_class:
278 unregister_chrdev(dgnc_Major, "dgnc");
279 return rc;
280 }
281
282 /* returns count (>= 0), or negative on error */
dgnc_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)283 static int dgnc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
284 {
285 int rc;
286
287 /* wake up and enable device */
288 rc = pci_enable_device(pdev);
289
290 if (rc < 0) {
291 rc = -EIO;
292 } else {
293 rc = dgnc_found_board(pdev, ent->driver_data);
294 if (rc == 0)
295 dgnc_NumBoards++;
296 }
297 return rc;
298 }
299
300 /*
301 * dgnc_cleanup_board()
302 *
303 * Free all the memory associated with a board
304 */
dgnc_cleanup_board(struct dgnc_board * brd)305 static void dgnc_cleanup_board(struct dgnc_board *brd)
306 {
307 int i = 0;
308
309 if (!brd || brd->magic != DGNC_BOARD_MAGIC)
310 return;
311
312 switch (brd->device) {
313 case PCI_DEVICE_CLASSIC_4_DID:
314 case PCI_DEVICE_CLASSIC_8_DID:
315 case PCI_DEVICE_CLASSIC_4_422_DID:
316 case PCI_DEVICE_CLASSIC_8_422_DID:
317
318 /* Tell card not to interrupt anymore. */
319 outb(0, brd->iobase + 0x4c);
320 break;
321
322 default:
323 break;
324 }
325
326 if (brd->irq)
327 free_irq(brd->irq, brd);
328
329 tasklet_kill(&brd->helper_tasklet);
330
331 if (brd->re_map_membase) {
332 iounmap(brd->re_map_membase);
333 brd->re_map_membase = NULL;
334 }
335
336 if (brd->msgbuf_head) {
337 unsigned long flags;
338
339 spin_lock_irqsave(&dgnc_global_lock, flags);
340 brd->msgbuf = NULL;
341 dev_dbg(&brd->pdev->dev, "%s\n", brd->msgbuf_head);
342 kfree(brd->msgbuf_head);
343 brd->msgbuf_head = NULL;
344 spin_unlock_irqrestore(&dgnc_global_lock, flags);
345 }
346
347 /* Free all allocated channels structs */
348 for (i = 0; i < MAXPORTS ; i++) {
349 if (brd->channels[i]) {
350 kfree(brd->channels[i]->ch_rqueue);
351 kfree(brd->channels[i]->ch_equeue);
352 kfree(brd->channels[i]->ch_wqueue);
353 kfree(brd->channels[i]);
354 brd->channels[i] = NULL;
355 }
356 }
357
358 kfree(brd->flipbuf);
359
360 dgnc_Board[brd->boardnum] = NULL;
361
362 kfree(brd);
363 }
364
365
366 /*
367 * dgnc_found_board()
368 *
369 * A board has been found, init it.
370 */
dgnc_found_board(struct pci_dev * pdev,int id)371 static int dgnc_found_board(struct pci_dev *pdev, int id)
372 {
373 struct dgnc_board *brd;
374 unsigned int pci_irq;
375 int i = 0;
376 int rc = 0;
377 unsigned long flags;
378
379 /* get the board structure and prep it */
380 dgnc_Board[dgnc_NumBoards] = kzalloc(sizeof(*brd), GFP_KERNEL);
381 brd = dgnc_Board[dgnc_NumBoards];
382
383 if (!brd)
384 return -ENOMEM;
385
386 /* make a temporary message buffer for the boot messages */
387 brd->msgbuf_head = kcalloc(8192, sizeof(u8), GFP_KERNEL);
388 brd->msgbuf = brd->msgbuf_head;
389
390 if (!brd->msgbuf) {
391 kfree(brd);
392 return -ENOMEM;
393 }
394
395 /* store the info for the board we've found */
396 brd->magic = DGNC_BOARD_MAGIC;
397 brd->boardnum = dgnc_NumBoards;
398 brd->vendor = dgnc_pci_tbl[id].vendor;
399 brd->device = dgnc_pci_tbl[id].device;
400 brd->pdev = pdev;
401 brd->pci_bus = pdev->bus->number;
402 brd->pci_slot = PCI_SLOT(pdev->devfn);
403 brd->name = dgnc_Ids[id].name;
404 brd->maxports = dgnc_Ids[id].maxports;
405 if (dgnc_Ids[i].is_pci_express)
406 brd->bd_flags |= BD_IS_PCI_EXPRESS;
407 brd->dpastatus = BD_NOFEP;
408 init_waitqueue_head(&brd->state_wait);
409
410 spin_lock_init(&brd->bd_lock);
411 spin_lock_init(&brd->bd_intr_lock);
412
413 brd->state = BOARD_FOUND;
414
415 for (i = 0; i < MAXPORTS; i++)
416 brd->channels[i] = NULL;
417
418 /* store which card & revision we have */
419 pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &brd->subvendor);
420 pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &brd->subdevice);
421 pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
422
423 pci_irq = pdev->irq;
424 brd->irq = pci_irq;
425
426
427 switch (brd->device) {
428
429 case PCI_DEVICE_CLASSIC_4_DID:
430 case PCI_DEVICE_CLASSIC_8_DID:
431 case PCI_DEVICE_CLASSIC_4_422_DID:
432 case PCI_DEVICE_CLASSIC_8_422_DID:
433
434 brd->dpatype = T_CLASSIC | T_PCIBUS;
435
436 /*
437 * For PCI ClassicBoards
438 * PCI Local Address (i.e. "resource" number) space
439 * 0 PLX Memory Mapped Config
440 * 1 PLX I/O Mapped Config
441 * 2 I/O Mapped UARTs and Status
442 * 3 Memory Mapped VPD
443 * 4 Memory Mapped UARTs and Status
444 */
445
446
447 /* get the PCI Base Address Registers */
448 brd->membase = pci_resource_start(pdev, 4);
449
450 if (!brd->membase) {
451 dev_err(&brd->pdev->dev,
452 "Card has no PCI IO resources, failing.\n");
453 return -ENODEV;
454 }
455
456 brd->membase_end = pci_resource_end(pdev, 4);
457
458 if (brd->membase & 1)
459 brd->membase &= ~3;
460 else
461 brd->membase &= ~15;
462
463 brd->iobase = pci_resource_start(pdev, 1);
464 brd->iobase_end = pci_resource_end(pdev, 1);
465 brd->iobase = ((unsigned int) (brd->iobase)) & 0xFFFE;
466
467 /* Assign the board_ops struct */
468 brd->bd_ops = &dgnc_cls_ops;
469
470 brd->bd_uart_offset = 0x8;
471 brd->bd_dividend = 921600;
472
473 dgnc_do_remap(brd);
474
475 /* Get and store the board VPD, if it exists */
476 brd->bd_ops->vpd(brd);
477
478 /*
479 * Enable Local Interrupt 1 (0x1),
480 * Local Interrupt 1 Polarity Active high (0x2),
481 * Enable PCI interrupt (0x40)
482 */
483 outb(0x43, brd->iobase + 0x4c);
484
485 break;
486
487
488 case PCI_DEVICE_NEO_4_DID:
489 case PCI_DEVICE_NEO_8_DID:
490 case PCI_DEVICE_NEO_2DB9_DID:
491 case PCI_DEVICE_NEO_2DB9PRI_DID:
492 case PCI_DEVICE_NEO_2RJ45_DID:
493 case PCI_DEVICE_NEO_2RJ45PRI_DID:
494 case PCI_DEVICE_NEO_1_422_DID:
495 case PCI_DEVICE_NEO_1_422_485_DID:
496 case PCI_DEVICE_NEO_2_422_485_DID:
497 case PCI_DEVICE_NEO_EXPRESS_8_DID:
498 case PCI_DEVICE_NEO_EXPRESS_4_DID:
499 case PCI_DEVICE_NEO_EXPRESS_4RJ45_DID:
500 case PCI_DEVICE_NEO_EXPRESS_8RJ45_DID:
501
502 /*
503 * This chip is set up 100% when we get to it.
504 * No need to enable global interrupts or anything.
505 */
506 if (brd->bd_flags & BD_IS_PCI_EXPRESS)
507 brd->dpatype = T_NEO_EXPRESS | T_PCIBUS;
508 else
509 brd->dpatype = T_NEO | T_PCIBUS;
510
511 /* get the PCI Base Address Registers */
512 brd->membase = pci_resource_start(pdev, 0);
513 brd->membase_end = pci_resource_end(pdev, 0);
514
515 if (brd->membase & 1)
516 brd->membase &= ~3;
517 else
518 brd->membase &= ~15;
519
520 /* Assign the board_ops struct */
521 brd->bd_ops = &dgnc_neo_ops;
522
523 brd->bd_uart_offset = 0x200;
524 brd->bd_dividend = 921600;
525
526 dgnc_do_remap(brd);
527
528 if (brd->re_map_membase) {
529
530 /* Read and store the dvid after remapping */
531 brd->dvid = readb(brd->re_map_membase + 0x8D);
532
533 /* Get and store the board VPD, if it exists */
534 brd->bd_ops->vpd(brd);
535 }
536 break;
537
538 default:
539 dev_err(&brd->pdev->dev,
540 "Didn't find any compatible Neo/Classic PCI boards.\n");
541 return -ENXIO;
542
543 }
544
545 /*
546 * Do tty device initialization.
547 */
548
549 rc = dgnc_tty_register(brd);
550 if (rc < 0) {
551 pr_err(DRVSTR ": Can't register tty devices (%d)\n", rc);
552 goto failed;
553 }
554
555 rc = dgnc_finalize_board_init(brd);
556 if (rc < 0) {
557 pr_err(DRVSTR ": Can't finalize board init (%d)\n", rc);
558 goto failed;
559 }
560
561 rc = dgnc_tty_init(brd);
562 if (rc < 0) {
563 pr_err(DRVSTR ": Can't init tty devices (%d)\n", rc);
564 goto failed;
565 }
566
567 brd->state = BOARD_READY;
568 brd->dpastatus = BD_RUNNING;
569
570 dgnc_create_ports_sysfiles(brd);
571
572 /* init our poll helper tasklet */
573 tasklet_init(&brd->helper_tasklet,
574 brd->bd_ops->tasklet,
575 (unsigned long) brd);
576
577 spin_lock_irqsave(&dgnc_global_lock, flags);
578 brd->msgbuf = NULL;
579 dev_dbg(&brd->pdev->dev, "%s\n", brd->msgbuf_head);
580 kfree(brd->msgbuf_head);
581 brd->msgbuf_head = NULL;
582 spin_unlock_irqrestore(&dgnc_global_lock, flags);
583
584 /*
585 * allocate flip buffer for board.
586 *
587 * Okay to malloc with GFP_KERNEL, we are not at interrupt
588 * context, and there are no locks held.
589 */
590 brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
591
592 wake_up_interruptible(&brd->state_wait);
593
594 return 0;
595
596 failed:
597 dgnc_tty_uninit(brd);
598 brd->state = BOARD_FAILED;
599 brd->dpastatus = BD_NOFEP;
600
601 return -ENXIO;
602
603 }
604
605
dgnc_finalize_board_init(struct dgnc_board * brd)606 static int dgnc_finalize_board_init(struct dgnc_board *brd)
607 {
608 int rc = 0;
609
610 if (!brd || brd->magic != DGNC_BOARD_MAGIC)
611 return -ENODEV;
612
613 if (brd->irq) {
614 rc = request_irq(brd->irq, brd->bd_ops->intr,
615 IRQF_SHARED, "DGNC", brd);
616
617 if (rc) {
618 dev_err(&brd->pdev->dev,
619 "Failed to hook IRQ %d\n", brd->irq);
620 brd->state = BOARD_FAILED;
621 brd->dpastatus = BD_NOFEP;
622 rc = -ENODEV;
623 }
624 }
625 return rc;
626 }
627
628 /*
629 * Remap PCI memory.
630 */
dgnc_do_remap(struct dgnc_board * brd)631 static void dgnc_do_remap(struct dgnc_board *brd)
632 {
633
634 if (!brd || brd->magic != DGNC_BOARD_MAGIC)
635 return;
636
637 brd->re_map_membase = ioremap(brd->membase, 0x1000);
638 }
639
640
641 /*****************************************************************************
642 *
643 * Function:
644 *
645 * dgnc_poll_handler
646 *
647 * Author:
648 *
649 * Scott H Kilau
650 *
651 * Parameters:
652 *
653 * dummy -- ignored
654 *
655 * Return Values:
656 *
657 * none
658 *
659 * Description:
660 *
661 * As each timer expires, it determines (a) whether the "transmit"
662 * waiter needs to be woken up, and (b) whether the poller needs to
663 * be rescheduled.
664 *
665 ******************************************************************************/
666
dgnc_poll_handler(ulong dummy)667 static void dgnc_poll_handler(ulong dummy)
668 {
669 struct dgnc_board *brd;
670 unsigned long flags;
671 int i;
672 unsigned long new_time;
673
674 /* Go thru each board, kicking off a tasklet for each if needed */
675 for (i = 0; i < dgnc_NumBoards; i++) {
676 brd = dgnc_Board[i];
677
678 spin_lock_irqsave(&brd->bd_lock, flags);
679
680 /* If board is in a failed state don't schedule a tasklet */
681 if (brd->state == BOARD_FAILED) {
682 spin_unlock_irqrestore(&brd->bd_lock, flags);
683 continue;
684 }
685
686 /* Schedule a poll helper task */
687 tasklet_schedule(&brd->helper_tasklet);
688
689 spin_unlock_irqrestore(&brd->bd_lock, flags);
690 }
691
692 /*
693 * Schedule ourself back at the nominal wakeup interval.
694 */
695 spin_lock_irqsave(&dgnc_poll_lock, flags);
696 dgnc_poll_time += dgnc_jiffies_from_ms(dgnc_poll_tick);
697
698 new_time = dgnc_poll_time - jiffies;
699
700 if ((ulong) new_time >= 2 * dgnc_poll_tick)
701 dgnc_poll_time = jiffies + dgnc_jiffies_from_ms(dgnc_poll_tick);
702
703 setup_timer(&dgnc_poll_timer, dgnc_poll_handler, 0);
704 dgnc_poll_timer.expires = dgnc_poll_time;
705 spin_unlock_irqrestore(&dgnc_poll_lock, flags);
706
707 if (!dgnc_poll_stop)
708 add_timer(&dgnc_poll_timer);
709 }
710
711 /*
712 * dgnc_init_globals()
713 *
714 * This is where we initialize the globals from the static insmod
715 * configuration variables. These are declared near the head of
716 * this file.
717 */
dgnc_init_globals(void)718 static void dgnc_init_globals(void)
719 {
720 int i = 0;
721
722 dgnc_NumBoards = 0;
723
724 for (i = 0; i < MAXBOARDS; i++)
725 dgnc_Board[i] = NULL;
726
727 init_timer(&dgnc_poll_timer);
728 }
729
730