1 /*********************************************************************
2 *
3 * Filename: irda_device.c
4 * Version: 0.9
5 * Description: Utility functions used by the device drivers
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sat Oct 9 09:22:27 1999
9 * Modified at: Sun Jan 23 17:41:24 2000
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * MA 02111-1307 USA
28 *
29 ********************************************************************/
30
31 #include <linux/config.h>
32 #include <linux/string.h>
33 #include <linux/proc_fs.h>
34 #include <linux/skbuff.h>
35 #include <linux/if.h>
36 #include <linux/if_ether.h>
37 #include <linux/if_arp.h>
38 #include <linux/netdevice.h>
39 #include <linux/init.h>
40 #include <linux/tty.h>
41 #include <linux/kmod.h>
42 #include <linux/wireless.h>
43 #include <linux/spinlock.h>
44
45 #include <asm/ioctls.h>
46 #include <asm/segment.h>
47 #include <asm/uaccess.h>
48 #include <asm/dma.h>
49 #include <asm/io.h>
50
51 #include <net/pkt_sched.h>
52
53 #include <net/irda/irda_device.h>
54 #include <net/irda/irlap.h>
55 #include <net/irda/timer.h>
56 #include <net/irda/wrapper.h>
57
58 extern int irtty_init(void);
59 extern int nsc_ircc_init(void);
60 extern int ircc_init(void);
61 extern int toshoboe_init(void);
62 extern int litelink_init(void);
63 extern int w83977af_init(void);
64 extern int esi_init(void);
65 extern int tekram_init(void);
66 extern int actisys_init(void);
67 extern int girbil_init(void);
68
69 static void __irda_task_delete(struct irda_task *task);
70
71 static hashbin_t *dongles = NULL;
72 static hashbin_t *tasks = NULL;
73
74 const char *infrared_mode[] = {
75 "IRDA_IRLAP",
76 "IRDA_RAW",
77 "SHARP_ASK",
78 "TV_REMOTE",
79 };
80
81 static const char *task_state[] = {
82 "IRDA_TASK_INIT",
83 "IRDA_TASK_DONE",
84 "IRDA_TASK_WAIT",
85 "IRDA_TASK_WAIT1",
86 "IRDA_TASK_WAIT2",
87 "IRDA_TASK_WAIT3",
88 "IRDA_TASK_CHILD_INIT",
89 "IRDA_TASK_CHILD_WAIT",
90 "IRDA_TASK_CHILD_DONE",
91 };
92
93 static void irda_task_timer_expired(void *data);
94
95 #ifdef CONFIG_PROC_FS
96 int irda_device_proc_read(char *buf, char **start, off_t offset, int len,
97 int unused);
98
99 #endif /* CONFIG_PROC_FS */
100
101 int __init irda_device_init( void)
102 {
103 dongles = hashbin_new(HB_GLOBAL);
104 if (dongles == NULL) {
105 printk(KERN_WARNING
106 "IrDA: Can't allocate dongles hashbin!\n");
107 return -ENOMEM;
108 }
109
110 tasks = hashbin_new(HB_GLOBAL);
111 if (tasks == NULL) {
112 printk(KERN_WARNING
113 "IrDA: Can't allocate tasks hashbin!\n");
114 return -ENOMEM;
115 }
116
117 /*
118 * Call the init function of the device drivers that has not been
119 * compiled as a module
120 */
121 #ifdef CONFIG_IRTTY_SIR
122 irtty_init();
123 #endif
124 #ifdef CONFIG_WINBOND_FIR
125 w83977af_init();
126 #endif
127 #ifdef CONFIG_NSC_FIR
128 nsc_ircc_init();
129 #endif
130 #ifdef CONFIG_TOSHIBA_FIR
131 toshoboe_init();
132 #endif
133 #ifdef CONFIG_SMC_IRCC_FIR
134 ircc_init();
135 #endif
136 #ifdef CONFIG_ESI_DONGLE
137 esi_init();
138 #endif
139 #ifdef CONFIG_TEKRAM_DONGLE
140 tekram_init();
141 #endif
142 #ifdef CONFIG_ACTISYS_DONGLE
143 actisys_init();
144 #endif
145 #ifdef CONFIG_GIRBIL_DONGLE
146 girbil_init();
147 #endif
148 #ifdef CONFIG_LITELINK_DONGLE
149 litelink_init();
150 #endif
151 #ifdef CONFIG_OLD_BELKIN
152 old_belkin_init();
153 #endif
154 return 0;
155 }
156
157 void irda_device_cleanup(void)
158 {
159 IRDA_DEBUG(4, __FUNCTION__ "()\n");
160
161 hashbin_delete(tasks, (FREE_FUNC) __irda_task_delete);
162 hashbin_delete(dongles, NULL);
163 }
164
165 /*
166 * Function irda_device_set_media_busy (self, status)
167 *
168 * Called when we have detected that another station is transmiting
169 * in contention mode.
170 */
171 void irda_device_set_media_busy(struct net_device *dev, int status)
172 {
173 struct irlap_cb *self;
174
175 IRDA_DEBUG(4, __FUNCTION__ "(%s)\n", status ? "TRUE" : "FALSE");
176
177 self = (struct irlap_cb *) dev->atalk_ptr;
178
179 ASSERT(self != NULL, return;);
180 ASSERT(self->magic == LAP_MAGIC, return;);
181
182 if (status) {
183 self->media_busy = TRUE;
184 irlap_start_mbusy_timer(self);
185 IRDA_DEBUG( 4, "Media busy!\n");
186 } else {
187 self->media_busy = FALSE;
188 irlap_stop_mbusy_timer(self);
189 }
190 }
191
192 int irda_device_set_dtr_rts(struct net_device *dev, int dtr, int rts)
193 {
194 struct if_irda_req req;
195 int ret;
196
197 IRDA_DEBUG(2, __FUNCTION__ "()\n");
198
199 if (!dev->do_ioctl) {
200 ERROR(__FUNCTION__ "(), do_ioctl not impl. by "
201 "device driver\n");
202 return -1;
203 }
204
205 req.ifr_dtr = dtr;
206 req.ifr_rts = rts;
207
208 ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCSDTRRTS);
209
210 return ret;
211 }
212
213 int irda_device_change_speed(struct net_device *dev, __u32 speed)
214 {
215 struct if_irda_req req;
216 int ret;
217
218 IRDA_DEBUG(2, __FUNCTION__ "()\n");
219
220 if (!dev->do_ioctl) {
221 ERROR(__FUNCTION__ "(), do_ioctl not impl. by "
222 "device driver\n");
223 return -1;
224 }
225
226 req.ifr_baudrate = speed;
227
228 ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCSBANDWIDTH);
229
230 return ret;
231 }
232
233 /*
234 * Function irda_device_is_receiving (dev)
235 *
236 * Check if the device driver is currently receiving data
237 *
238 */
239 int irda_device_is_receiving(struct net_device *dev)
240 {
241 struct if_irda_req req;
242 int ret;
243
244 IRDA_DEBUG(2, __FUNCTION__ "()\n");
245
246 if (!dev->do_ioctl) {
247 ERROR(__FUNCTION__ "(), do_ioctl not impl. by "
248 "device driver\n");
249 return -1;
250 }
251
252 ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCGRECEIVING);
253 if (ret < 0)
254 return ret;
255
256 return req.ifr_receiving;
257 }
258
259 void irda_task_next_state(struct irda_task *task, IRDA_TASK_STATE state)
260 {
261 IRDA_DEBUG(2, __FUNCTION__ "(), state = %s\n", task_state[state]);
262
263 task->state = state;
264 }
265
266 static void __irda_task_delete(struct irda_task *task)
267 {
268 del_timer(&task->timer);
269
270 kfree(task);
271 }
272
273 void irda_task_delete(struct irda_task *task)
274 {
275 /* Unregister task */
276 hashbin_remove(tasks, (int) task, NULL);
277
278 __irda_task_delete(task);
279 }
280
281 /*
282 * Function irda_task_kick (task)
283 *
284 * Tries to execute a task possible multiple times until the task is either
285 * finished, or askes for a timeout. When a task is finished, we do post
286 * processing, and notify the parent task, that is waiting for this task
287 * to complete.
288 */
289 int irda_task_kick(struct irda_task *task)
290 {
291 int finished = TRUE;
292 int count = 0;
293 int timeout;
294
295 IRDA_DEBUG(2, __FUNCTION__ "()\n");
296
297 ASSERT(task != NULL, return -1;);
298 ASSERT(task->magic == IRDA_TASK_MAGIC, return -1;);
299
300 /* Execute task until it's finished, or askes for a timeout */
301 do {
302 timeout = task->function(task);
303 if (count++ > 100) {
304 ERROR(__FUNCTION__ "(), error in task handler!\n");
305 irda_task_delete(task);
306 return TRUE;
307 }
308 } while ((timeout == 0) && (task->state != IRDA_TASK_DONE));
309
310 if (timeout < 0) {
311 ERROR(__FUNCTION__ "(), Error executing task!\n");
312 irda_task_delete(task);
313 return TRUE;
314 }
315
316 /* Check if we are finished */
317 if (task->state == IRDA_TASK_DONE) {
318 del_timer(&task->timer);
319
320 /* Do post processing */
321 if (task->finished)
322 task->finished(task);
323
324 /* Notify parent */
325 if (task->parent) {
326 /* Check if parent is waiting for us to complete */
327 if (task->parent->state == IRDA_TASK_CHILD_WAIT) {
328 task->parent->state = IRDA_TASK_CHILD_DONE;
329
330 /* Stop timer now that we are here */
331 del_timer(&task->parent->timer);
332
333 /* Kick parent task */
334 irda_task_kick(task->parent);
335 }
336 }
337 irda_task_delete(task);
338 } else if (timeout > 0) {
339 irda_start_timer(&task->timer, timeout, (void *) task,
340 irda_task_timer_expired);
341 finished = FALSE;
342 } else {
343 IRDA_DEBUG(0, __FUNCTION__
344 "(), not finished, and no timeout!\n");
345 finished = FALSE;
346 }
347
348 return finished;
349 }
350
351 /*
352 * Function irda_task_execute (instance, function, finished)
353 *
354 * This function registers and tries to execute tasks that may take some
355 * time to complete. We do it this hairy way since we may have been
356 * called from interrupt context, so it's not possible to use
357 * schedule_timeout()
358 */
359 struct irda_task *irda_task_execute(void *instance,
360 IRDA_TASK_CALLBACK function,
361 IRDA_TASK_CALLBACK finished,
362 struct irda_task *parent, void *param)
363 {
364 struct irda_task *task;
365 int ret;
366
367 IRDA_DEBUG(2, __FUNCTION__ "()\n");
368
369 task = kmalloc(sizeof(struct irda_task), GFP_ATOMIC);
370 if (!task)
371 return NULL;
372
373 task->state = IRDA_TASK_INIT;
374 task->instance = instance;
375 task->function = function;
376 task->finished = finished;
377 task->parent = parent;
378 task->param = param;
379 task->magic = IRDA_TASK_MAGIC;
380
381 init_timer(&task->timer);
382
383 /* Register task */
384 hashbin_insert(tasks, (irda_queue_t *) task, (int) task, NULL);
385
386 /* No time to waste, so lets get going! */
387 ret = irda_task_kick(task);
388 if (ret)
389 return NULL;
390 else
391 return task;
392 }
393
394 /*
395 * Function irda_task_timer_expired (data)
396 *
397 * Task time has expired. We now try to execute task (again), and restart
398 * the timer if the task has not finished yet
399 */
400 static void irda_task_timer_expired(void *data)
401 {
402 struct irda_task *task;
403
404 IRDA_DEBUG(2, __FUNCTION__ "()\n");
405
406 task = (struct irda_task *) data;
407
408 irda_task_kick(task);
409 }
410
411 /*
412 * Function irda_device_setup (dev)
413 *
414 * This function should be used by low level device drivers in a similar way
415 * as ether_setup() is used by normal network device drivers
416 */
417 int irda_device_setup(struct net_device *dev)
418 {
419 ASSERT(dev != NULL, return -1;);
420
421 dev->hard_header_len = 0;
422 dev->addr_len = 0;
423
424 dev->features |= NETIF_F_DYNALLOC;
425 /* dev->destructor = irda_device_destructor; */
426
427 dev->type = ARPHRD_IRDA;
428 dev->tx_queue_len = 8; /* Window size + 1 s-frame */
429
430 memset(dev->broadcast, 0xff, 4);
431
432 dev->mtu = 2048;
433 dev_init_buffers(dev);
434 dev->flags = IFF_NOARP;
435 return 0;
436 }
437
438 /*
439 * Function irda_device_txqueue_empty (dev)
440 *
441 * Check if there is still some frames in the transmit queue for this
442 * device. Maybe we should use: q->q.qlen == 0.
443 *
444 */
445 int irda_device_txqueue_empty(struct net_device *dev)
446 {
447 if (skb_queue_len(&dev->qdisc->q))
448 return FALSE;
449
450 return TRUE;
451 }
452
453 /*
454 * Function irda_device_init_dongle (self, type, qos)
455 *
456 * Initialize attached dongle.
457 */
458 dongle_t *irda_device_dongle_init(struct net_device *dev, int type)
459 {
460 struct dongle_reg *reg;
461 char modname[32];
462 dongle_t *dongle;
463
464 ASSERT(dev != NULL, return NULL;);
465
466 #ifdef CONFIG_KMOD
467 /* Try to load the module needed */
468 sprintf(modname, "irda-dongle-%d", type);
469 request_module(modname);
470 #endif /* CONFIG_KMOD */
471
472 if (!(reg = hashbin_find(dongles, type, NULL))) {
473 ERROR("IrDA: Unable to find requested dongle\n");
474 return NULL;
475 }
476
477 /* Allocate dongle info for this instance */
478 dongle = kmalloc(sizeof(dongle_t), GFP_KERNEL);
479 if (!dongle)
480 return NULL;
481
482 memset(dongle, 0, sizeof(dongle_t));
483
484 /* Bind the registration info to this particular instance */
485 dongle->issue = reg;
486 dongle->dev = dev;
487
488 return dongle;
489 }
490
491 /*
492 * Function irda_device_dongle_cleanup (dongle)
493 *
494 *
495 *
496 */
497 int irda_device_dongle_cleanup(dongle_t *dongle)
498 {
499 ASSERT(dongle != NULL, return -1;);
500
501 dongle->issue->close(dongle);
502
503 kfree(dongle);
504
505 return 0;
506 }
507
508 /*
509 * Function irda_device_register_dongle (dongle)
510 *
511 *
512 *
513 */
514 int irda_device_register_dongle(struct dongle_reg *new)
515 {
516 /* Check if this dongle has been registred before */
517 if (hashbin_find(dongles, new->type, NULL)) {
518 MESSAGE(__FUNCTION__ "(), Dongle already registered\n");
519 return 0;
520 }
521
522 /* Insert IrDA dongle into hashbin */
523 hashbin_insert(dongles, (irda_queue_t *) new, new->type, NULL);
524
525 return 0;
526 }
527
528 /*
529 * Function irda_device_unregister_dongle (dongle)
530 *
531 * Unregister dongle, and remove dongle from list of registred dongles
532 *
533 */
534 void irda_device_unregister_dongle(struct dongle_reg *dongle)
535 {
536 struct dongle *node;
537
538 node = hashbin_remove(dongles, dongle->type, NULL);
539 if (!node) {
540 ERROR(__FUNCTION__ "(), dongle not found!\n");
541 return;
542 }
543 }
544
545 /*
546 * Function irda_device_set_mode (self, mode)
547 *
548 * Set the Infrared device driver into mode where it sends and receives
549 * data without using IrLAP framing. Check out the particular device
550 * driver to find out which modes it support.
551 */
552 int irda_device_set_mode(struct net_device* dev, int mode)
553 {
554 struct if_irda_req req;
555 int ret;
556
557 IRDA_DEBUG(0, __FUNCTION__ "()\n");
558
559 if (!dev->do_ioctl) {
560 ERROR(__FUNCTION__ "(), set_raw_mode not impl. by "
561 "device driver\n");
562 return -1;
563 }
564
565 req.ifr_mode = mode;
566
567 ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCSMODE);
568
569 return ret;
570 }
571
572 /*
573 * Function setup_dma (idev, buffer, count, mode)
574 *
575 * Setup the DMA channel. Commonly used by ISA FIR drivers
576 *
577 */
578 void setup_dma(int channel, char *buffer, int count, int mode)
579 {
580 unsigned long flags;
581
582 flags = claim_dma_lock();
583
584 disable_dma(channel);
585 clear_dma_ff(channel);
586 set_dma_mode(channel, mode);
587 set_dma_addr(channel, virt_to_bus(buffer));
588 set_dma_count(channel, count);
589 enable_dma(channel);
590
591 release_dma_lock(flags);
592 }
593
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