Commit | Line | Data |
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1b2b03f8 KK |
1 | /* |
2 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/types.h> | |
16 | #include <linux/stddef.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/spinlock.h> | |
19 | #include <linux/mISDNif.h> | |
20 | #include "core.h" | |
21 | ||
22 | static u_int debug; | |
23 | ||
24 | MODULE_AUTHOR("Karsten Keil"); | |
25 | MODULE_LICENSE("GPL"); | |
26 | module_param(debug, uint, S_IRUGO | S_IWUSR); | |
27 | ||
1b2b03f8 KK |
28 | static u64 device_ids; |
29 | #define MAX_DEVICE_ID 63 | |
30 | ||
31 | static LIST_HEAD(Bprotocols); | |
5b834354 | 32 | static DEFINE_RWLOCK(bp_lock); |
1b2b03f8 | 33 | |
b36b654a MU |
34 | static void mISDN_dev_release(struct device *dev) |
35 | { | |
36 | /* nothing to do: the device is part of its parent's data structure */ | |
37 | } | |
38 | ||
39 | static ssize_t _show_id(struct device *dev, | |
40 | struct device_attribute *attr, char *buf) | |
41 | { | |
42 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
43 | ||
44 | if (!mdev) | |
45 | return -ENODEV; | |
46 | return sprintf(buf, "%d\n", mdev->id); | |
47 | } | |
48 | ||
49 | static ssize_t _show_nrbchan(struct device *dev, | |
50 | struct device_attribute *attr, char *buf) | |
51 | { | |
52 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
53 | ||
54 | if (!mdev) | |
55 | return -ENODEV; | |
56 | return sprintf(buf, "%d\n", mdev->nrbchan); | |
57 | } | |
58 | ||
59 | static ssize_t _show_d_protocols(struct device *dev, | |
60 | struct device_attribute *attr, char *buf) | |
61 | { | |
62 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
63 | ||
64 | if (!mdev) | |
65 | return -ENODEV; | |
66 | return sprintf(buf, "%d\n", mdev->Dprotocols); | |
67 | } | |
68 | ||
69 | static ssize_t _show_b_protocols(struct device *dev, | |
70 | struct device_attribute *attr, char *buf) | |
71 | { | |
72 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
73 | ||
74 | if (!mdev) | |
75 | return -ENODEV; | |
76 | return sprintf(buf, "%d\n", mdev->Bprotocols | get_all_Bprotocols()); | |
77 | } | |
78 | ||
79 | static ssize_t _show_protocol(struct device *dev, | |
80 | struct device_attribute *attr, char *buf) | |
81 | { | |
82 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
83 | ||
84 | if (!mdev) | |
85 | return -ENODEV; | |
86 | return sprintf(buf, "%d\n", mdev->D.protocol); | |
87 | } | |
88 | ||
89 | static ssize_t _show_name(struct device *dev, | |
90 | struct device_attribute *attr, char *buf) | |
91 | { | |
92 | strcpy(buf, dev_name(dev)); | |
93 | return strlen(buf); | |
94 | } | |
95 | ||
96 | #if 0 /* hangs */ | |
97 | static ssize_t _set_name(struct device *dev, struct device_attribute *attr, | |
98 | const char *buf, size_t count) | |
99 | { | |
100 | int err = 0; | |
101 | char *out = kmalloc(count + 1, GFP_KERNEL); | |
102 | ||
103 | if (!out) | |
104 | return -ENOMEM; | |
105 | ||
106 | memcpy(out, buf, count); | |
107 | if (count && out[count - 1] == '\n') | |
108 | out[--count] = 0; | |
109 | if (count) | |
110 | err = device_rename(dev, out); | |
111 | kfree(out); | |
112 | ||
113 | return (err < 0) ? err : count; | |
114 | } | |
115 | #endif | |
116 | ||
117 | static ssize_t _show_channelmap(struct device *dev, | |
118 | struct device_attribute *attr, char *buf) | |
119 | { | |
120 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
121 | char *bp = buf; | |
122 | int i; | |
123 | ||
124 | for (i = 0; i <= mdev->nrbchan; i++) | |
125 | *bp++ = test_channelmap(i, mdev->channelmap) ? '1' : '0'; | |
126 | ||
127 | return bp - buf; | |
128 | } | |
129 | ||
130 | static struct device_attribute mISDN_dev_attrs[] = { | |
131 | __ATTR(id, S_IRUGO, _show_id, NULL), | |
132 | __ATTR(d_protocols, S_IRUGO, _show_d_protocols, NULL), | |
133 | __ATTR(b_protocols, S_IRUGO, _show_b_protocols, NULL), | |
134 | __ATTR(protocol, S_IRUGO, _show_protocol, NULL), | |
135 | __ATTR(channelmap, S_IRUGO, _show_channelmap, NULL), | |
136 | __ATTR(nrbchan, S_IRUGO, _show_nrbchan, NULL), | |
137 | __ATTR(name, S_IRUGO, _show_name, NULL), | |
138 | /* __ATTR(name, S_IRUGO|S_IWUSR, _show_name, _set_name), */ | |
139 | {} | |
140 | }; | |
141 | ||
142 | #ifdef CONFIG_HOTPLUG | |
143 | static int mISDN_uevent(struct device *dev, struct kobj_uevent_env *env) | |
144 | { | |
145 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
146 | ||
147 | if (!mdev) | |
148 | return 0; | |
149 | ||
150 | if (add_uevent_var(env, "nchans=%d", mdev->nrbchan)) | |
151 | return -ENOMEM; | |
152 | ||
153 | return 0; | |
154 | } | |
155 | #endif | |
156 | ||
157 | static void mISDN_class_release(struct class *cls) | |
158 | { | |
159 | /* do nothing, it's static */ | |
160 | } | |
161 | ||
162 | static struct class mISDN_class = { | |
163 | .name = "mISDN", | |
164 | .owner = THIS_MODULE, | |
165 | #ifdef CONFIG_HOTPLUG | |
166 | .dev_uevent = mISDN_uevent, | |
167 | #endif | |
168 | .dev_attrs = mISDN_dev_attrs, | |
169 | .dev_release = mISDN_dev_release, | |
170 | .class_release = mISDN_class_release, | |
171 | }; | |
172 | ||
173 | static int | |
174 | _get_mdevice(struct device *dev, void *id) | |
175 | { | |
176 | struct mISDNdevice *mdev = dev_to_mISDN(dev); | |
177 | ||
178 | if (!mdev) | |
179 | return 0; | |
180 | if (mdev->id != *(u_int *)id) | |
181 | return 0; | |
182 | return 1; | |
183 | } | |
184 | ||
1b2b03f8 KK |
185 | struct mISDNdevice |
186 | *get_mdevice(u_int id) | |
187 | { | |
b36b654a MU |
188 | return dev_to_mISDN(class_find_device(&mISDN_class, NULL, &id, |
189 | _get_mdevice)); | |
190 | } | |
1b2b03f8 | 191 | |
b36b654a MU |
192 | static int |
193 | _get_mdevice_count(struct device *dev, void *cnt) | |
194 | { | |
195 | *(int *)cnt += 1; | |
196 | return 0; | |
1b2b03f8 KK |
197 | } |
198 | ||
199 | int | |
200 | get_mdevice_count(void) | |
201 | { | |
b36b654a | 202 | int cnt = 0; |
1b2b03f8 | 203 | |
b36b654a | 204 | class_for_each_device(&mISDN_class, NULL, &cnt, _get_mdevice_count); |
1b2b03f8 KK |
205 | return cnt; |
206 | } | |
207 | ||
208 | static int | |
209 | get_free_devid(void) | |
210 | { | |
211 | u_int i; | |
212 | ||
213 | for (i = 0; i <= MAX_DEVICE_ID; i++) | |
214 | if (!test_and_set_bit(i, (u_long *)&device_ids)) | |
b36b654a MU |
215 | break; |
216 | if (i > MAX_DEVICE_ID) | |
ddacd14e | 217 | return -EBUSY; |
b36b654a | 218 | return i; |
1b2b03f8 KK |
219 | } |
220 | ||
221 | int | |
b36b654a MU |
222 | mISDN_register_device(struct mISDNdevice *dev, |
223 | struct device *parent, char *name) | |
1b2b03f8 | 224 | { |
1b2b03f8 KK |
225 | int err; |
226 | ||
ddacd14e RK |
227 | err = get_free_devid(); |
228 | if (err < 0) | |
b36b654a | 229 | goto error1; |
ddacd14e | 230 | dev->id = err; |
b36b654a MU |
231 | |
232 | device_initialize(&dev->dev); | |
1b2b03f8 | 233 | if (name && name[0]) |
837468d1 | 234 | dev_set_name(&dev->dev, "%s", name); |
1b2b03f8 | 235 | else |
837468d1 | 236 | dev_set_name(&dev->dev, "mISDN%d", dev->id); |
1b2b03f8 KK |
237 | if (debug & DEBUG_CORE) |
238 | printk(KERN_DEBUG "mISDN_register %s %d\n", | |
837468d1 | 239 | dev_name(&dev->dev), dev->id); |
1b2b03f8 KK |
240 | err = create_stack(dev); |
241 | if (err) | |
b36b654a MU |
242 | goto error1; |
243 | ||
244 | dev->dev.class = &mISDN_class; | |
245 | dev->dev.platform_data = dev; | |
246 | dev->dev.parent = parent; | |
247 | dev_set_drvdata(&dev->dev, dev); | |
248 | ||
249 | err = device_add(&dev->dev); | |
250 | if (err) | |
251 | goto error3; | |
1b2b03f8 | 252 | return 0; |
b36b654a MU |
253 | |
254 | error3: | |
255 | delete_stack(dev); | |
256 | return err; | |
257 | error1: | |
258 | return err; | |
259 | ||
1b2b03f8 KK |
260 | } |
261 | EXPORT_SYMBOL(mISDN_register_device); | |
262 | ||
263 | void | |
264 | mISDN_unregister_device(struct mISDNdevice *dev) { | |
1b2b03f8 KK |
265 | if (debug & DEBUG_CORE) |
266 | printk(KERN_DEBUG "mISDN_unregister %s %d\n", | |
837468d1 | 267 | dev_name(&dev->dev), dev->id); |
b36b654a MU |
268 | /* sysfs_remove_link(&dev->dev.kobj, "device"); */ |
269 | device_del(&dev->dev); | |
270 | dev_set_drvdata(&dev->dev, NULL); | |
271 | ||
1b2b03f8 KK |
272 | test_and_clear_bit(dev->id, (u_long *)&device_ids); |
273 | delete_stack(dev); | |
b36b654a | 274 | put_device(&dev->dev); |
1b2b03f8 KK |
275 | } |
276 | EXPORT_SYMBOL(mISDN_unregister_device); | |
277 | ||
278 | u_int | |
279 | get_all_Bprotocols(void) | |
280 | { | |
281 | struct Bprotocol *bp; | |
282 | u_int m = 0; | |
283 | ||
284 | read_lock(&bp_lock); | |
285 | list_for_each_entry(bp, &Bprotocols, list) | |
286 | m |= bp->Bprotocols; | |
287 | read_unlock(&bp_lock); | |
288 | return m; | |
289 | } | |
290 | ||
291 | struct Bprotocol * | |
292 | get_Bprotocol4mask(u_int m) | |
293 | { | |
294 | struct Bprotocol *bp; | |
295 | ||
296 | read_lock(&bp_lock); | |
297 | list_for_each_entry(bp, &Bprotocols, list) | |
298 | if (bp->Bprotocols & m) { | |
299 | read_unlock(&bp_lock); | |
300 | return bp; | |
301 | } | |
302 | read_unlock(&bp_lock); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | struct Bprotocol * | |
307 | get_Bprotocol4id(u_int id) | |
308 | { | |
309 | u_int m; | |
310 | ||
311 | if (id < ISDN_P_B_START || id > 63) { | |
312 | printk(KERN_WARNING "%s id not in range %d\n", | |
313 | __func__, id); | |
314 | return NULL; | |
315 | } | |
316 | m = 1 << (id & ISDN_P_B_MASK); | |
317 | return get_Bprotocol4mask(m); | |
318 | } | |
319 | ||
320 | int | |
321 | mISDN_register_Bprotocol(struct Bprotocol *bp) | |
322 | { | |
323 | u_long flags; | |
324 | struct Bprotocol *old; | |
325 | ||
326 | if (debug & DEBUG_CORE) | |
327 | printk(KERN_DEBUG "%s: %s/%x\n", __func__, | |
328 | bp->name, bp->Bprotocols); | |
329 | old = get_Bprotocol4mask(bp->Bprotocols); | |
330 | if (old) { | |
331 | printk(KERN_WARNING | |
332 | "register duplicate protocol old %s/%x new %s/%x\n", | |
333 | old->name, old->Bprotocols, bp->name, bp->Bprotocols); | |
334 | return -EBUSY; | |
335 | } | |
336 | write_lock_irqsave(&bp_lock, flags); | |
337 | list_add_tail(&bp->list, &Bprotocols); | |
338 | write_unlock_irqrestore(&bp_lock, flags); | |
339 | return 0; | |
340 | } | |
341 | EXPORT_SYMBOL(mISDN_register_Bprotocol); | |
342 | ||
343 | void | |
344 | mISDN_unregister_Bprotocol(struct Bprotocol *bp) | |
345 | { | |
346 | u_long flags; | |
347 | ||
348 | if (debug & DEBUG_CORE) | |
349 | printk(KERN_DEBUG "%s: %s/%x\n", __func__, bp->name, | |
350 | bp->Bprotocols); | |
351 | write_lock_irqsave(&bp_lock, flags); | |
352 | list_del(&bp->list); | |
353 | write_unlock_irqrestore(&bp_lock, flags); | |
354 | } | |
355 | EXPORT_SYMBOL(mISDN_unregister_Bprotocol); | |
356 | ||
5b834354 | 357 | static int |
1b2b03f8 KK |
358 | mISDNInit(void) |
359 | { | |
360 | int err; | |
361 | ||
362 | printk(KERN_INFO "Modular ISDN core version %d.%d.%d\n", | |
363 | MISDN_MAJOR_VERSION, MISDN_MINOR_VERSION, MISDN_RELEASE); | |
3bd69ad1 | 364 | mISDN_init_clock(&debug); |
1b2b03f8 | 365 | mISDN_initstack(&debug); |
b36b654a MU |
366 | err = class_register(&mISDN_class); |
367 | if (err) | |
368 | goto error1; | |
1b2b03f8 KK |
369 | err = mISDN_inittimer(&debug); |
370 | if (err) | |
b36b654a | 371 | goto error2; |
1b2b03f8 | 372 | err = l1_init(&debug); |
b36b654a MU |
373 | if (err) |
374 | goto error3; | |
1b2b03f8 | 375 | err = Isdnl2_Init(&debug); |
b36b654a MU |
376 | if (err) |
377 | goto error4; | |
1b2b03f8 | 378 | err = misdn_sock_init(&debug); |
b36b654a MU |
379 | if (err) |
380 | goto error5; | |
381 | return 0; | |
382 | ||
383 | error5: | |
384 | Isdnl2_cleanup(); | |
385 | error4: | |
386 | l1_cleanup(); | |
387 | error3: | |
388 | mISDN_timer_cleanup(); | |
389 | error2: | |
390 | class_unregister(&mISDN_class); | |
391 | error1: | |
1b2b03f8 KK |
392 | return err; |
393 | } | |
394 | ||
5b834354 | 395 | static void mISDN_cleanup(void) |
1b2b03f8 KK |
396 | { |
397 | misdn_sock_cleanup(); | |
1b2b03f8 | 398 | Isdnl2_cleanup(); |
b36b654a MU |
399 | l1_cleanup(); |
400 | mISDN_timer_cleanup(); | |
401 | class_unregister(&mISDN_class); | |
1b2b03f8 | 402 | |
1b2b03f8 KK |
403 | printk(KERN_DEBUG "mISDNcore unloaded\n"); |
404 | } | |
405 | ||
406 | module_init(mISDNInit); | |
407 | module_exit(mISDN_cleanup); | |
408 |