1
2
3
4
5
6
7
8
9
10
11
12
13
14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/delay.h>
18
19#include <net/irda/irda.h>
20#include <net/irda/wrapper.h>
21#include <net/irda/irda_device.h>
22
23#include "sir-dev.h"
24
25
26static struct workqueue_struct *irda_sir_wq;
27
28
29
30
31
32
33
34static int sirdev_tx_complete_fsm(struct sir_dev *dev)
35{
36 struct sir_fsm *fsm = &dev->fsm;
37 unsigned next_state, delay;
38 unsigned bytes_left;
39
40 do {
41 next_state = fsm->substate;
42 delay = 0;
43
44 switch(fsm->substate) {
45
46 case SIRDEV_STATE_WAIT_XMIT:
47 if (dev->drv->chars_in_buffer)
48 bytes_left = dev->drv->chars_in_buffer(dev);
49 else
50 bytes_left = 0;
51 if (!bytes_left) {
52 next_state = SIRDEV_STATE_WAIT_UNTIL_SENT;
53 break;
54 }
55
56 if (dev->speed > 115200)
57 delay = (bytes_left*8*10000) / (dev->speed/100);
58 else if (dev->speed > 0)
59 delay = (bytes_left*10*10000) / (dev->speed/100);
60 else
61 delay = 0;
62
63 if (delay < 100) {
64 udelay(delay);
65 delay = 0;
66 break;
67 }
68
69 delay = (delay+999) / 1000;
70 break;
71
72 case SIRDEV_STATE_WAIT_UNTIL_SENT:
73
74 if (dev->drv->wait_until_sent)
75 dev->drv->wait_until_sent(dev);
76 next_state = SIRDEV_STATE_TX_DONE;
77 break;
78
79 case SIRDEV_STATE_TX_DONE:
80 return 0;
81
82 default:
83 IRDA_ERROR("%s - undefined state\n", __func__);
84 return -EINVAL;
85 }
86 fsm->substate = next_state;
87 } while (delay == 0);
88 return delay;
89}
90
91
92
93
94
95
96
97
98
99
100
101
102static void sirdev_config_fsm(struct work_struct *work)
103{
104 struct sir_dev *dev = container_of(work, struct sir_dev, fsm.work.work);
105 struct sir_fsm *fsm = &dev->fsm;
106 int next_state;
107 int ret = -1;
108 unsigned delay;
109
110 IRDA_DEBUG(2, "%s(), <%ld>\n", __func__, jiffies);
111
112 do {
113 IRDA_DEBUG(3, "%s - state=0x%04x / substate=0x%04x\n",
114 __func__, fsm->state, fsm->substate);
115
116 next_state = fsm->state;
117 delay = 0;
118
119 switch(fsm->state) {
120
121 case SIRDEV_STATE_DONGLE_OPEN:
122 if (dev->dongle_drv != NULL) {
123 ret = sirdev_put_dongle(dev);
124 if (ret) {
125 fsm->result = -EINVAL;
126 next_state = SIRDEV_STATE_ERROR;
127 break;
128 }
129 }
130
131
132 ret = sirdev_get_dongle(dev, fsm->param);
133 if (ret) {
134 fsm->result = ret;
135 next_state = SIRDEV_STATE_ERROR;
136 break;
137 }
138
139
140
141
142
143
144
145 delay = 50;
146 fsm->substate = SIRDEV_STATE_DONGLE_RESET;
147 next_state = SIRDEV_STATE_DONGLE_RESET;
148
149 fsm->param = 9600;
150
151 break;
152
153 case SIRDEV_STATE_DONGLE_CLOSE:
154
155 if (dev->dongle_drv == NULL) {
156 fsm->result = -EINVAL;
157 next_state = SIRDEV_STATE_ERROR;
158 break;
159 }
160
161 ret = sirdev_put_dongle(dev);
162 if (ret) {
163 fsm->result = ret;
164 next_state = SIRDEV_STATE_ERROR;
165 break;
166 }
167 next_state = SIRDEV_STATE_DONE;
168 break;
169
170 case SIRDEV_STATE_SET_DTR_RTS:
171 ret = sirdev_set_dtr_rts(dev,
172 (fsm->param&0x02) ? TRUE : FALSE,
173 (fsm->param&0x01) ? TRUE : FALSE);
174 next_state = SIRDEV_STATE_DONE;
175 break;
176
177 case SIRDEV_STATE_SET_SPEED:
178 fsm->substate = SIRDEV_STATE_WAIT_XMIT;
179 next_state = SIRDEV_STATE_DONGLE_CHECK;
180 break;
181
182 case SIRDEV_STATE_DONGLE_CHECK:
183 ret = sirdev_tx_complete_fsm(dev);
184 if (ret < 0) {
185 fsm->result = ret;
186 next_state = SIRDEV_STATE_ERROR;
187 break;
188 }
189 if ((delay=ret) != 0)
190 break;
191
192 if (dev->dongle_drv) {
193 fsm->substate = SIRDEV_STATE_DONGLE_RESET;
194 next_state = SIRDEV_STATE_DONGLE_RESET;
195 }
196 else {
197 dev->speed = fsm->param;
198 next_state = SIRDEV_STATE_PORT_SPEED;
199 }
200 break;
201
202 case SIRDEV_STATE_DONGLE_RESET:
203 if (dev->dongle_drv->reset) {
204 ret = dev->dongle_drv->reset(dev);
205 if (ret < 0) {
206 fsm->result = ret;
207 next_state = SIRDEV_STATE_ERROR;
208 break;
209 }
210 }
211 else
212 ret = 0;
213 if ((delay=ret) == 0) {
214
215 if (dev->drv->set_speed)
216 dev->drv->set_speed(dev, dev->speed);
217 fsm->substate = SIRDEV_STATE_DONGLE_SPEED;
218 next_state = SIRDEV_STATE_DONGLE_SPEED;
219 }
220 break;
221
222 case SIRDEV_STATE_DONGLE_SPEED:
223 if (dev->dongle_drv->reset) {
224 ret = dev->dongle_drv->set_speed(dev, fsm->param);
225 if (ret < 0) {
226 fsm->result = ret;
227 next_state = SIRDEV_STATE_ERROR;
228 break;
229 }
230 }
231 else
232 ret = 0;
233 if ((delay=ret) == 0)
234 next_state = SIRDEV_STATE_PORT_SPEED;
235 break;
236
237 case SIRDEV_STATE_PORT_SPEED:
238
239 if (dev->drv->set_speed)
240 dev->drv->set_speed(dev, dev->speed);
241 dev->new_speed = 0;
242 next_state = SIRDEV_STATE_DONE;
243 break;
244
245 case SIRDEV_STATE_DONE:
246
247 netif_wake_queue(dev->netdev);
248 next_state = SIRDEV_STATE_COMPLETE;
249 break;
250
251 default:
252 IRDA_ERROR("%s - undefined state\n", __func__);
253 fsm->result = -EINVAL;
254
255
256 case SIRDEV_STATE_ERROR:
257 IRDA_ERROR("%s - error: %d\n", __func__, fsm->result);
258
259#if 0
260 netif_stop_queue(dev->netdev);
261#else
262 netif_wake_queue(dev->netdev);
263#endif
264
265
266 case SIRDEV_STATE_COMPLETE:
267
268 sirdev_enable_rx(dev);
269 up(&fsm->sem);
270 return;
271 }
272 fsm->state = next_state;
273 } while(!delay);
274
275 queue_delayed_work(irda_sir_wq, &fsm->work, msecs_to_jiffies(delay));
276}
277
278
279
280
281
282
283int sirdev_schedule_request(struct sir_dev *dev, int initial_state, unsigned param)
284{
285 struct sir_fsm *fsm = &dev->fsm;
286
287 IRDA_DEBUG(2, "%s - state=0x%04x / param=%u\n", __func__,
288 initial_state, param);
289
290 if (down_trylock(&fsm->sem)) {
291 if (in_interrupt() || in_atomic() || irqs_disabled()) {
292 IRDA_DEBUG(1, "%s(), state machine busy!\n", __func__);
293 return -EWOULDBLOCK;
294 } else
295 down(&fsm->sem);
296 }
297
298 if (fsm->state == SIRDEV_STATE_DEAD) {
299
300 IRDA_ERROR("%s(), instance staled!\n", __func__);
301 up(&fsm->sem);
302 return -ESTALE;
303 }
304
305 netif_stop_queue(dev->netdev);
306 atomic_set(&dev->enable_rx, 0);
307
308 fsm->state = initial_state;
309 fsm->param = param;
310 fsm->result = 0;
311
312 INIT_DELAYED_WORK(&fsm->work, sirdev_config_fsm);
313 queue_delayed_work(irda_sir_wq, &fsm->work, 0);
314 return 0;
315}
316
317
318
319
320void sirdev_enable_rx(struct sir_dev *dev)
321{
322 if (unlikely(atomic_read(&dev->enable_rx)))
323 return;
324
325
326 dev->rx_buff.data = dev->rx_buff.head;
327 dev->rx_buff.len = 0;
328 dev->rx_buff.in_frame = FALSE;
329 dev->rx_buff.state = OUTSIDE_FRAME;
330 atomic_set(&dev->enable_rx, 1);
331}
332
333static int sirdev_is_receiving(struct sir_dev *dev)
334{
335 if (!atomic_read(&dev->enable_rx))
336 return 0;
337
338 return (dev->rx_buff.state != OUTSIDE_FRAME);
339}
340
341int sirdev_set_dongle(struct sir_dev *dev, IRDA_DONGLE type)
342{
343 int err;
344
345 IRDA_DEBUG(3, "%s : requesting dongle %d.\n", __func__, type);
346
347 err = sirdev_schedule_dongle_open(dev, type);
348 if (unlikely(err))
349 return err;
350 down(&dev->fsm.sem);
351 err = dev->fsm.result;
352 up(&dev->fsm.sem);
353 return err;
354}
355EXPORT_SYMBOL(sirdev_set_dongle);
356
357
358
359int sirdev_raw_write(struct sir_dev *dev, const char *buf, int len)
360{
361 unsigned long flags;
362 int ret;
363
364 if (unlikely(len > dev->tx_buff.truesize))
365 return -ENOSPC;
366
367 spin_lock_irqsave(&dev->tx_lock, flags);
368 while (dev->tx_buff.len > 0) {
369 spin_unlock_irqrestore(&dev->tx_lock, flags);
370 msleep(10);
371 spin_lock_irqsave(&dev->tx_lock, flags);
372 }
373
374 dev->tx_buff.data = dev->tx_buff.head;
375 memcpy(dev->tx_buff.data, buf, len);
376 dev->tx_buff.len = len;
377
378 ret = dev->drv->do_write(dev, dev->tx_buff.data, dev->tx_buff.len);
379 if (ret > 0) {
380 IRDA_DEBUG(3, "%s(), raw-tx started\n", __func__);
381
382 dev->tx_buff.data += ret;
383 dev->tx_buff.len -= ret;
384 dev->raw_tx = 1;
385 ret = len;
386 }
387 spin_unlock_irqrestore(&dev->tx_lock, flags);
388 return ret;
389}
390EXPORT_SYMBOL(sirdev_raw_write);
391
392
393
394int sirdev_raw_read(struct sir_dev *dev, char *buf, int len)
395{
396 int count;
397
398 if (atomic_read(&dev->enable_rx))
399 return -EIO;
400
401 count = (len < dev->rx_buff.len) ? len : dev->rx_buff.len;
402
403 if (count > 0) {
404 memcpy(buf, dev->rx_buff.data, count);
405 dev->rx_buff.data += count;
406 dev->rx_buff.len -= count;
407 }
408
409
410
411 return count;
412}
413EXPORT_SYMBOL(sirdev_raw_read);
414
415int sirdev_set_dtr_rts(struct sir_dev *dev, int dtr, int rts)
416{
417 int ret = -ENXIO;
418 if (dev->drv->set_dtr_rts)
419 ret = dev->drv->set_dtr_rts(dev, dtr, rts);
420 return ret;
421}
422EXPORT_SYMBOL(sirdev_set_dtr_rts);
423
424
425
426
427
428
429
430
431void sirdev_write_complete(struct sir_dev *dev)
432{
433 unsigned long flags;
434 struct sk_buff *skb;
435 int actual = 0;
436 int err;
437
438 spin_lock_irqsave(&dev->tx_lock, flags);
439
440 IRDA_DEBUG(3, "%s() - dev->tx_buff.len = %d\n",
441 __func__, dev->tx_buff.len);
442
443 if (likely(dev->tx_buff.len > 0)) {
444
445 actual = dev->drv->do_write(dev, dev->tx_buff.data, dev->tx_buff.len);
446
447 if (likely(actual>0)) {
448 dev->tx_buff.data += actual;
449 dev->tx_buff.len -= actual;
450 }
451 else if (unlikely(actual<0)) {
452
453 IRDA_ERROR("%s: drv->do_write failed (%d)\n",
454 __func__, actual);
455 if ((skb=dev->tx_skb) != NULL) {
456 dev->tx_skb = NULL;
457 dev_kfree_skb_any(skb);
458 dev->netdev->stats.tx_errors++;
459 dev->netdev->stats.tx_dropped++;
460 }
461 dev->tx_buff.len = 0;
462 }
463 if (dev->tx_buff.len > 0)
464 goto done;
465 }
466
467 if (unlikely(dev->raw_tx != 0)) {
468
469
470
471
472
473
474
475 IRDA_DEBUG(3, "%s(), raw-tx done\n", __func__);
476 dev->raw_tx = 0;
477 goto done;
478 }
479
480
481
482
483
484
485
486
487
488
489
490
491
492 IRDA_DEBUG(5, "%s(), finished with frame!\n", __func__);
493
494 if ((skb=dev->tx_skb) != NULL) {
495 dev->tx_skb = NULL;
496 dev->netdev->stats.tx_packets++;
497 dev->netdev->stats.tx_bytes += skb->len;
498 dev_kfree_skb_any(skb);
499 }
500
501 if (unlikely(dev->new_speed > 0)) {
502 IRDA_DEBUG(5, "%s(), Changing speed!\n", __func__);
503 err = sirdev_schedule_speed(dev, dev->new_speed);
504 if (unlikely(err)) {
505
506
507
508 IRDA_ERROR("%s - schedule speed change failed: %d\n",
509 __func__, err);
510 netif_wake_queue(dev->netdev);
511 }
512
513
514
515
516
517 }
518 else {
519 sirdev_enable_rx(dev);
520 netif_wake_queue(dev->netdev);
521 }
522
523done:
524 spin_unlock_irqrestore(&dev->tx_lock, flags);
525}
526EXPORT_SYMBOL(sirdev_write_complete);
527
528
529
530
531
532
533int sirdev_receive(struct sir_dev *dev, const unsigned char *cp, size_t count)
534{
535 if (!dev || !dev->netdev) {
536 IRDA_WARNING("%s(), not ready yet!\n", __func__);
537 return -1;
538 }
539
540 if (!dev->irlap) {
541 IRDA_WARNING("%s - too early: %p / %zd!\n",
542 __func__, cp, count);
543 return -1;
544 }
545
546 if (cp==NULL) {
547
548
549
550 irda_device_set_media_busy(dev->netdev, TRUE);
551 dev->netdev->stats.rx_dropped++;
552 IRDA_DEBUG(0, "%s; rx-drop: %zd\n", __func__, count);
553 return 0;
554 }
555
556
557 if (likely(atomic_read(&dev->enable_rx))) {
558 while (count--)
559
560 async_unwrap_char(dev->netdev, &dev->netdev->stats,
561 &dev->rx_buff, *cp++);
562 } else {
563 while (count--) {
564
565
566
567
568
569 dev->rx_buff.data[dev->rx_buff.len++] = *cp++;
570
571
572 if (unlikely(dev->rx_buff.len == dev->rx_buff.truesize))
573 dev->rx_buff.len = 0;
574 }
575 }
576
577 return 0;
578}
579EXPORT_SYMBOL(sirdev_receive);
580
581
582
583
584
585static netdev_tx_t sirdev_hard_xmit(struct sk_buff *skb,
586 struct net_device *ndev)
587{
588 struct sir_dev *dev = netdev_priv(ndev);
589 unsigned long flags;
590 int actual = 0;
591 int err;
592 s32 speed;
593
594 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
595
596 netif_stop_queue(ndev);
597
598 IRDA_DEBUG(3, "%s(), skb->len = %d\n", __func__, skb->len);
599
600 speed = irda_get_next_speed(skb);
601 if ((speed != dev->speed) && (speed != -1)) {
602 if (!skb->len) {
603 err = sirdev_schedule_speed(dev, speed);
604 if (unlikely(err == -EWOULDBLOCK)) {
605
606
607
608
609
610
611 return NETDEV_TX_BUSY;
612 }
613 else if (unlikely(err)) {
614
615
616
617 netif_start_queue(ndev);
618 }
619
620
621
622
623
624 dev_kfree_skb_any(skb);
625 return NETDEV_TX_OK;
626 } else
627 dev->new_speed = speed;
628 }
629
630
631 dev->tx_buff.data = dev->tx_buff.head;
632
633
634 if(spin_is_locked(&dev->tx_lock)) {
635 IRDA_DEBUG(3, "%s(), write not completed\n", __func__);
636 }
637
638
639 spin_lock_irqsave(&dev->tx_lock, flags);
640
641
642 dev->tx_buff.len = async_wrap_skb(skb, dev->tx_buff.data, dev->tx_buff.truesize);
643
644
645
646
647
648
649 atomic_set(&dev->enable_rx, 0);
650 if (unlikely(sirdev_is_receiving(dev)))
651 dev->netdev->stats.collisions++;
652
653 actual = dev->drv->do_write(dev, dev->tx_buff.data, dev->tx_buff.len);
654
655 if (likely(actual > 0)) {
656 dev->tx_skb = skb;
657 ndev->trans_start = jiffies;
658 dev->tx_buff.data += actual;
659 dev->tx_buff.len -= actual;
660 }
661 else if (unlikely(actual < 0)) {
662
663 IRDA_ERROR("%s: drv->do_write failed (%d)\n",
664 __func__, actual);
665 dev_kfree_skb_any(skb);
666 dev->netdev->stats.tx_errors++;
667 dev->netdev->stats.tx_dropped++;
668 netif_wake_queue(ndev);
669 }
670 spin_unlock_irqrestore(&dev->tx_lock, flags);
671
672 return NETDEV_TX_OK;
673}
674
675
676
677static int sirdev_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
678{
679 struct if_irda_req *irq = (struct if_irda_req *) rq;
680 struct sir_dev *dev = netdev_priv(ndev);
681 int ret = 0;
682
683 IRDA_ASSERT(dev != NULL, return -1;);
684
685 IRDA_DEBUG(3, "%s(), %s, (cmd=0x%X)\n", __func__, ndev->name, cmd);
686
687 switch (cmd) {
688 case SIOCSBANDWIDTH:
689 if (!capable(CAP_NET_ADMIN))
690 ret = -EPERM;
691 else
692 ret = sirdev_schedule_speed(dev, irq->ifr_baudrate);
693
694
695
696 break;
697
698 case SIOCSDONGLE:
699 if (!capable(CAP_NET_ADMIN))
700 ret = -EPERM;
701 else
702 ret = sirdev_schedule_dongle_open(dev, irq->ifr_dongle);
703
704
705
706 break;
707
708 case SIOCSMEDIABUSY:
709 if (!capable(CAP_NET_ADMIN))
710 ret = -EPERM;
711 else
712 irda_device_set_media_busy(dev->netdev, TRUE);
713 break;
714
715 case SIOCGRECEIVING:
716 irq->ifr_receiving = sirdev_is_receiving(dev);
717 break;
718
719 case SIOCSDTRRTS:
720 if (!capable(CAP_NET_ADMIN))
721 ret = -EPERM;
722 else
723 ret = sirdev_schedule_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
724
725
726
727 break;
728
729 case SIOCSMODE:
730#if 0
731 if (!capable(CAP_NET_ADMIN))
732 ret = -EPERM;
733 else
734 ret = sirdev_schedule_mode(dev, irq->ifr_mode);
735
736
737
738 break;
739#endif
740 default:
741 ret = -EOPNOTSUPP;
742 }
743
744 return ret;
745}
746
747
748
749#define SIRBUF_ALLOCSIZE 4269
750
751static int sirdev_alloc_buffers(struct sir_dev *dev)
752{
753 dev->tx_buff.truesize = SIRBUF_ALLOCSIZE;
754 dev->rx_buff.truesize = IRDA_SKB_MAX_MTU;
755
756
757 dev->rx_buff.skb = __netdev_alloc_skb(dev->netdev, dev->rx_buff.truesize,
758 GFP_KERNEL);
759 if (dev->rx_buff.skb == NULL)
760 return -ENOMEM;
761 skb_reserve(dev->rx_buff.skb, 1);
762 dev->rx_buff.head = dev->rx_buff.skb->data;
763
764 dev->tx_buff.head = kmalloc(dev->tx_buff.truesize, GFP_KERNEL);
765 if (dev->tx_buff.head == NULL) {
766 kfree_skb(dev->rx_buff.skb);
767 dev->rx_buff.skb = NULL;
768 dev->rx_buff.head = NULL;
769 return -ENOMEM;
770 }
771
772 dev->tx_buff.data = dev->tx_buff.head;
773 dev->rx_buff.data = dev->rx_buff.head;
774 dev->tx_buff.len = 0;
775 dev->rx_buff.len = 0;
776
777 dev->rx_buff.in_frame = FALSE;
778 dev->rx_buff.state = OUTSIDE_FRAME;
779 return 0;
780};
781
782static void sirdev_free_buffers(struct sir_dev *dev)
783{
784 kfree_skb(dev->rx_buff.skb);
785 kfree(dev->tx_buff.head);
786 dev->rx_buff.head = dev->tx_buff.head = NULL;
787 dev->rx_buff.skb = NULL;
788}
789
790static int sirdev_open(struct net_device *ndev)
791{
792 struct sir_dev *dev = netdev_priv(ndev);
793 const struct sir_driver *drv = dev->drv;
794
795 if (!drv)
796 return -ENODEV;
797
798
799 if (!try_module_get(drv->owner))
800 return -ESTALE;
801
802 IRDA_DEBUG(2, "%s()\n", __func__);
803
804 if (sirdev_alloc_buffers(dev))
805 goto errout_dec;
806
807 if (!dev->drv->start_dev || dev->drv->start_dev(dev))
808 goto errout_free;
809
810 sirdev_enable_rx(dev);
811 dev->raw_tx = 0;
812
813 netif_start_queue(ndev);
814 dev->irlap = irlap_open(ndev, &dev->qos, dev->hwname);
815 if (!dev->irlap)
816 goto errout_stop;
817
818 netif_wake_queue(ndev);
819
820 IRDA_DEBUG(2, "%s - done, speed = %d\n", __func__, dev->speed);
821
822 return 0;
823
824errout_stop:
825 atomic_set(&dev->enable_rx, 0);
826 if (dev->drv->stop_dev)
827 dev->drv->stop_dev(dev);
828errout_free:
829 sirdev_free_buffers(dev);
830errout_dec:
831 module_put(drv->owner);
832 return -EAGAIN;
833}
834
835static int sirdev_close(struct net_device *ndev)
836{
837 struct sir_dev *dev = netdev_priv(ndev);
838 const struct sir_driver *drv;
839
840
841
842 netif_stop_queue(ndev);
843
844 down(&dev->fsm.sem);
845
846 atomic_set(&dev->enable_rx, 0);
847
848 if (unlikely(!dev->irlap))
849 goto out;
850 irlap_close(dev->irlap);
851 dev->irlap = NULL;
852
853 drv = dev->drv;
854 if (unlikely(!drv || !dev->priv))
855 goto out;
856
857 if (drv->stop_dev)
858 drv->stop_dev(dev);
859
860 sirdev_free_buffers(dev);
861 module_put(drv->owner);
862
863out:
864 dev->speed = 0;
865 up(&dev->fsm.sem);
866 return 0;
867}
868
869static const struct net_device_ops sirdev_ops = {
870 .ndo_start_xmit = sirdev_hard_xmit,
871 .ndo_open = sirdev_open,
872 .ndo_stop = sirdev_close,
873 .ndo_do_ioctl = sirdev_ioctl,
874};
875
876
877struct sir_dev * sirdev_get_instance(const struct sir_driver *drv, const char *name)
878{
879 struct net_device *ndev;
880 struct sir_dev *dev;
881
882 IRDA_DEBUG(0, "%s - %s\n", __func__, name);
883
884
885
886
887
888 if (!drv || !drv->do_write)
889 return NULL;
890
891
892
893
894 ndev = alloc_irdadev(sizeof(*dev));
895 if (ndev == NULL) {
896 IRDA_ERROR("%s - Can't allocate memory for IrDA control block!\n", __func__);
897 goto out;
898 }
899 dev = netdev_priv(ndev);
900
901 irda_init_max_qos_capabilies(&dev->qos);
902 dev->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
903 dev->qos.min_turn_time.bits = drv->qos_mtt_bits;
904 irda_qos_bits_to_value(&dev->qos);
905
906 strncpy(dev->hwname, name, sizeof(dev->hwname)-1);
907
908 atomic_set(&dev->enable_rx, 0);
909 dev->tx_skb = NULL;
910
911 spin_lock_init(&dev->tx_lock);
912 init_MUTEX(&dev->fsm.sem);
913
914 dev->drv = drv;
915 dev->netdev = ndev;
916
917
918 ndev->netdev_ops = &sirdev_ops;
919
920 if (register_netdev(ndev)) {
921 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
922 goto out_freenetdev;
923 }
924
925 return dev;
926
927out_freenetdev:
928 free_netdev(ndev);
929out:
930 return NULL;
931}
932EXPORT_SYMBOL(sirdev_get_instance);
933
934int sirdev_put_instance(struct sir_dev *dev)
935{
936 int err = 0;
937
938 IRDA_DEBUG(0, "%s\n", __func__);
939
940 atomic_set(&dev->enable_rx, 0);
941
942 netif_carrier_off(dev->netdev);
943 netif_device_detach(dev->netdev);
944
945 if (dev->dongle_drv)
946 err = sirdev_schedule_dongle_close(dev);
947 if (err)
948 IRDA_ERROR("%s - error %d\n", __func__, err);
949
950 sirdev_close(dev->netdev);
951
952 down(&dev->fsm.sem);
953 dev->fsm.state = SIRDEV_STATE_DEAD;
954 dev->dongle_drv = NULL;
955 dev->priv = NULL;
956 up(&dev->fsm.sem);
957
958
959 unregister_netdev(dev->netdev);
960
961 free_netdev(dev->netdev);
962
963 return 0;
964}
965EXPORT_SYMBOL(sirdev_put_instance);
966
967static int __init sir_wq_init(void)
968{
969 irda_sir_wq = create_singlethread_workqueue("irda_sir_wq");
970 if (!irda_sir_wq)
971 return -ENOMEM;
972 return 0;
973}
974
975static void __exit sir_wq_exit(void)
976{
977 destroy_workqueue(irda_sir_wq);
978}
979
980module_init(sir_wq_init);
981module_exit(sir_wq_exit);
982
983MODULE_AUTHOR("Martin Diehl <info@mdiehl.de>");
984MODULE_DESCRIPTION("IrDA SIR core");
985MODULE_LICENSE("GPL");
986