This source file includes following definitions.
- mISDN_dev_release
- id_show
- nrbchan_show
- d_protocols_show
- b_protocols_show
- protocol_show
- name_show
- name_set
- channelmap_show
- mISDN_uevent
- mISDN_class_release
- _get_mdevice
- get_mdevice
- _get_mdevice_count
- get_mdevice_count
- get_free_devid
- mISDN_register_device
- mISDN_unregister_device
- get_all_Bprotocols
- get_Bprotocol4mask
- get_Bprotocol4id
- mISDN_register_Bprotocol
- mISDN_unregister_Bprotocol
- mISDNDevName4ch
- mISDNInit
- mISDN_cleanup
1
2
3
4
5
6 #include <linux/slab.h>
7 #include <linux/types.h>
8 #include <linux/stddef.h>
9 #include <linux/module.h>
10 #include <linux/spinlock.h>
11 #include <linux/mISDNif.h>
12 #include "core.h"
13
14 static u_int debug;
15
16 MODULE_AUTHOR("Karsten Keil");
17 MODULE_LICENSE("GPL");
18 module_param(debug, uint, S_IRUGO | S_IWUSR);
19
20 static u64 device_ids;
21 #define MAX_DEVICE_ID 63
22
23 static LIST_HEAD(Bprotocols);
24 static DEFINE_RWLOCK(bp_lock);
25
26 static void mISDN_dev_release(struct device *dev)
27 {
28
29 }
30
31 static ssize_t id_show(struct device *dev,
32 struct device_attribute *attr, char *buf)
33 {
34 struct mISDNdevice *mdev = dev_to_mISDN(dev);
35
36 if (!mdev)
37 return -ENODEV;
38 return sprintf(buf, "%d\n", mdev->id);
39 }
40 static DEVICE_ATTR_RO(id);
41
42 static ssize_t nrbchan_show(struct device *dev,
43 struct device_attribute *attr, char *buf)
44 {
45 struct mISDNdevice *mdev = dev_to_mISDN(dev);
46
47 if (!mdev)
48 return -ENODEV;
49 return sprintf(buf, "%d\n", mdev->nrbchan);
50 }
51 static DEVICE_ATTR_RO(nrbchan);
52
53 static ssize_t d_protocols_show(struct device *dev,
54 struct device_attribute *attr, char *buf)
55 {
56 struct mISDNdevice *mdev = dev_to_mISDN(dev);
57
58 if (!mdev)
59 return -ENODEV;
60 return sprintf(buf, "%d\n", mdev->Dprotocols);
61 }
62 static DEVICE_ATTR_RO(d_protocols);
63
64 static ssize_t b_protocols_show(struct device *dev,
65 struct device_attribute *attr, char *buf)
66 {
67 struct mISDNdevice *mdev = dev_to_mISDN(dev);
68
69 if (!mdev)
70 return -ENODEV;
71 return sprintf(buf, "%d\n", mdev->Bprotocols | get_all_Bprotocols());
72 }
73 static DEVICE_ATTR_RO(b_protocols);
74
75 static ssize_t protocol_show(struct device *dev,
76 struct device_attribute *attr, char *buf)
77 {
78 struct mISDNdevice *mdev = dev_to_mISDN(dev);
79
80 if (!mdev)
81 return -ENODEV;
82 return sprintf(buf, "%d\n", mdev->D.protocol);
83 }
84 static DEVICE_ATTR_RO(protocol);
85
86 static ssize_t name_show(struct device *dev,
87 struct device_attribute *attr, char *buf)
88 {
89 strcpy(buf, dev_name(dev));
90 return strlen(buf);
91 }
92 static DEVICE_ATTR_RO(name);
93
94 #if 0
95 static ssize_t name_set(struct device *dev, struct device_attribute *attr,
96 const char *buf, size_t count)
97 {
98 int err = 0;
99 char *out = kmalloc(count + 1, GFP_KERNEL);
100
101 if (!out)
102 return -ENOMEM;
103
104 memcpy(out, buf, count);
105 if (count && out[count - 1] == '\n')
106 out[--count] = 0;
107 if (count)
108 err = device_rename(dev, out);
109 kfree(out);
110
111 return (err < 0) ? err : count;
112 }
113 static DEVICE_ATTR_RW(name);
114 #endif
115
116 static ssize_t channelmap_show(struct device *dev,
117 struct device_attribute *attr, char *buf)
118 {
119 struct mISDNdevice *mdev = dev_to_mISDN(dev);
120 char *bp = buf;
121 int i;
122
123 for (i = 0; i <= mdev->nrbchan; i++)
124 *bp++ = test_channelmap(i, mdev->channelmap) ? '1' : '0';
125
126 return bp - buf;
127 }
128 static DEVICE_ATTR_RO(channelmap);
129
130 static struct attribute *mISDN_attrs[] = {
131 &dev_attr_id.attr,
132 &dev_attr_d_protocols.attr,
133 &dev_attr_b_protocols.attr,
134 &dev_attr_protocol.attr,
135 &dev_attr_channelmap.attr,
136 &dev_attr_nrbchan.attr,
137 &dev_attr_name.attr,
138 NULL,
139 };
140 ATTRIBUTE_GROUPS(mISDN);
141
142 static int mISDN_uevent(struct device *dev, struct kobj_uevent_env *env)
143 {
144 struct mISDNdevice *mdev = dev_to_mISDN(dev);
145
146 if (!mdev)
147 return 0;
148
149 if (add_uevent_var(env, "nchans=%d", mdev->nrbchan))
150 return -ENOMEM;
151
152 return 0;
153 }
154
155 static void mISDN_class_release(struct class *cls)
156 {
157
158 }
159
160 static struct class mISDN_class = {
161 .name = "mISDN",
162 .owner = THIS_MODULE,
163 .dev_uevent = mISDN_uevent,
164 .dev_groups = mISDN_groups,
165 .dev_release = mISDN_dev_release,
166 .class_release = mISDN_class_release,
167 };
168
169 static int
170 _get_mdevice(struct device *dev, const void *id)
171 {
172 struct mISDNdevice *mdev = dev_to_mISDN(dev);
173
174 if (!mdev)
175 return 0;
176 if (mdev->id != *(const u_int *)id)
177 return 0;
178 return 1;
179 }
180
181 struct mISDNdevice
182 *get_mdevice(u_int id)
183 {
184 return dev_to_mISDN(class_find_device(&mISDN_class, NULL, &id,
185 _get_mdevice));
186 }
187
188 static int
189 _get_mdevice_count(struct device *dev, void *cnt)
190 {
191 *(int *)cnt += 1;
192 return 0;
193 }
194
195 int
196 get_mdevice_count(void)
197 {
198 int cnt = 0;
199
200 class_for_each_device(&mISDN_class, NULL, &cnt, _get_mdevice_count);
201 return cnt;
202 }
203
204 static int
205 get_free_devid(void)
206 {
207 u_int i;
208
209 for (i = 0; i <= MAX_DEVICE_ID; i++)
210 if (!test_and_set_bit(i, (u_long *)&device_ids))
211 break;
212 if (i > MAX_DEVICE_ID)
213 return -EBUSY;
214 return i;
215 }
216
217 int
218 mISDN_register_device(struct mISDNdevice *dev,
219 struct device *parent, char *name)
220 {
221 int err;
222
223 err = get_free_devid();
224 if (err < 0)
225 goto error1;
226 dev->id = err;
227
228 device_initialize(&dev->dev);
229 if (name && name[0])
230 dev_set_name(&dev->dev, "%s", name);
231 else
232 dev_set_name(&dev->dev, "mISDN%d", dev->id);
233 if (debug & DEBUG_CORE)
234 printk(KERN_DEBUG "mISDN_register %s %d\n",
235 dev_name(&dev->dev), dev->id);
236 err = create_stack(dev);
237 if (err)
238 goto error1;
239
240 dev->dev.class = &mISDN_class;
241 dev->dev.platform_data = dev;
242 dev->dev.parent = parent;
243 dev_set_drvdata(&dev->dev, dev);
244
245 err = device_add(&dev->dev);
246 if (err)
247 goto error3;
248 return 0;
249
250 error3:
251 delete_stack(dev);
252 return err;
253 error1:
254 return err;
255
256 }
257 EXPORT_SYMBOL(mISDN_register_device);
258
259 void
260 mISDN_unregister_device(struct mISDNdevice *dev) {
261 if (debug & DEBUG_CORE)
262 printk(KERN_DEBUG "mISDN_unregister %s %d\n",
263 dev_name(&dev->dev), dev->id);
264
265 device_del(&dev->dev);
266 dev_set_drvdata(&dev->dev, NULL);
267
268 test_and_clear_bit(dev->id, (u_long *)&device_ids);
269 delete_stack(dev);
270 put_device(&dev->dev);
271 }
272 EXPORT_SYMBOL(mISDN_unregister_device);
273
274 u_int
275 get_all_Bprotocols(void)
276 {
277 struct Bprotocol *bp;
278 u_int m = 0;
279
280 read_lock(&bp_lock);
281 list_for_each_entry(bp, &Bprotocols, list)
282 m |= bp->Bprotocols;
283 read_unlock(&bp_lock);
284 return m;
285 }
286
287 struct Bprotocol *
288 get_Bprotocol4mask(u_int m)
289 {
290 struct Bprotocol *bp;
291
292 read_lock(&bp_lock);
293 list_for_each_entry(bp, &Bprotocols, list)
294 if (bp->Bprotocols & m) {
295 read_unlock(&bp_lock);
296 return bp;
297 }
298 read_unlock(&bp_lock);
299 return NULL;
300 }
301
302 struct Bprotocol *
303 get_Bprotocol4id(u_int id)
304 {
305 u_int m;
306
307 if (id < ISDN_P_B_START || id > 63) {
308 printk(KERN_WARNING "%s id not in range %d\n",
309 __func__, id);
310 return NULL;
311 }
312 m = 1 << (id & ISDN_P_B_MASK);
313 return get_Bprotocol4mask(m);
314 }
315
316 int
317 mISDN_register_Bprotocol(struct Bprotocol *bp)
318 {
319 u_long flags;
320 struct Bprotocol *old;
321
322 if (debug & DEBUG_CORE)
323 printk(KERN_DEBUG "%s: %s/%x\n", __func__,
324 bp->name, bp->Bprotocols);
325 old = get_Bprotocol4mask(bp->Bprotocols);
326 if (old) {
327 printk(KERN_WARNING
328 "register duplicate protocol old %s/%x new %s/%x\n",
329 old->name, old->Bprotocols, bp->name, bp->Bprotocols);
330 return -EBUSY;
331 }
332 write_lock_irqsave(&bp_lock, flags);
333 list_add_tail(&bp->list, &Bprotocols);
334 write_unlock_irqrestore(&bp_lock, flags);
335 return 0;
336 }
337 EXPORT_SYMBOL(mISDN_register_Bprotocol);
338
339 void
340 mISDN_unregister_Bprotocol(struct Bprotocol *bp)
341 {
342 u_long flags;
343
344 if (debug & DEBUG_CORE)
345 printk(KERN_DEBUG "%s: %s/%x\n", __func__, bp->name,
346 bp->Bprotocols);
347 write_lock_irqsave(&bp_lock, flags);
348 list_del(&bp->list);
349 write_unlock_irqrestore(&bp_lock, flags);
350 }
351 EXPORT_SYMBOL(mISDN_unregister_Bprotocol);
352
353 static const char *msg_no_channel = "<no channel>";
354 static const char *msg_no_stack = "<no stack>";
355 static const char *msg_no_stackdev = "<no stack device>";
356
357 const char *mISDNDevName4ch(struct mISDNchannel *ch)
358 {
359 if (!ch)
360 return msg_no_channel;
361 if (!ch->st)
362 return msg_no_stack;
363 if (!ch->st->dev)
364 return msg_no_stackdev;
365 return dev_name(&ch->st->dev->dev);
366 };
367 EXPORT_SYMBOL(mISDNDevName4ch);
368
369 static int
370 mISDNInit(void)
371 {
372 int err;
373
374 printk(KERN_INFO "Modular ISDN core version %d.%d.%d\n",
375 MISDN_MAJOR_VERSION, MISDN_MINOR_VERSION, MISDN_RELEASE);
376 mISDN_init_clock(&debug);
377 mISDN_initstack(&debug);
378 err = class_register(&mISDN_class);
379 if (err)
380 goto error1;
381 err = mISDN_inittimer(&debug);
382 if (err)
383 goto error2;
384 err = l1_init(&debug);
385 if (err)
386 goto error3;
387 err = Isdnl2_Init(&debug);
388 if (err)
389 goto error4;
390 err = misdn_sock_init(&debug);
391 if (err)
392 goto error5;
393 return 0;
394
395 error5:
396 Isdnl2_cleanup();
397 error4:
398 l1_cleanup();
399 error3:
400 mISDN_timer_cleanup();
401 error2:
402 class_unregister(&mISDN_class);
403 error1:
404 return err;
405 }
406
407 static void mISDN_cleanup(void)
408 {
409 misdn_sock_cleanup();
410 Isdnl2_cleanup();
411 l1_cleanup();
412 mISDN_timer_cleanup();
413 class_unregister(&mISDN_class);
414
415 printk(KERN_DEBUG "mISDNcore unloaded\n");
416 }
417
418 module_init(mISDNInit);
419 module_exit(mISDN_cleanup);