include: replace linux/module.h with "struct module" wherever possible
[linux-2.6/next.git] / drivers / isdn / mISDN / core.c
blobafeebb00fe0bcafc8e690e199613daa54d6e901e
1 /*
2 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
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.
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.
15 #include <linux/slab.h>
16 #include <linux/types.h>
17 #include <linux/stddef.h>
18 #include <linux/module.h>
19 #include <linux/spinlock.h>
20 #include <linux/mISDNif.h>
21 #include "core.h"
23 static u_int debug;
25 MODULE_AUTHOR("Karsten Keil");
26 MODULE_LICENSE("GPL");
27 module_param(debug, uint, S_IRUGO | S_IWUSR);
29 static u64 device_ids;
30 #define MAX_DEVICE_ID 63
32 static LIST_HEAD(Bprotocols);
33 static DEFINE_RWLOCK(bp_lock);
35 static void mISDN_dev_release(struct device *dev)
37 /* nothing to do: the device is part of its parent's data structure */
40 static ssize_t _show_id(struct device *dev,
41 struct device_attribute *attr, char *buf)
43 struct mISDNdevice *mdev = dev_to_mISDN(dev);
45 if (!mdev)
46 return -ENODEV;
47 return sprintf(buf, "%d\n", mdev->id);
50 static ssize_t _show_nrbchan(struct device *dev,
51 struct device_attribute *attr, char *buf)
53 struct mISDNdevice *mdev = dev_to_mISDN(dev);
55 if (!mdev)
56 return -ENODEV;
57 return sprintf(buf, "%d\n", mdev->nrbchan);
60 static ssize_t _show_d_protocols(struct device *dev,
61 struct device_attribute *attr, char *buf)
63 struct mISDNdevice *mdev = dev_to_mISDN(dev);
65 if (!mdev)
66 return -ENODEV;
67 return sprintf(buf, "%d\n", mdev->Dprotocols);
70 static ssize_t _show_b_protocols(struct device *dev,
71 struct device_attribute *attr, char *buf)
73 struct mISDNdevice *mdev = dev_to_mISDN(dev);
75 if (!mdev)
76 return -ENODEV;
77 return sprintf(buf, "%d\n", mdev->Bprotocols | get_all_Bprotocols());
80 static ssize_t _show_protocol(struct device *dev,
81 struct device_attribute *attr, char *buf)
83 struct mISDNdevice *mdev = dev_to_mISDN(dev);
85 if (!mdev)
86 return -ENODEV;
87 return sprintf(buf, "%d\n", mdev->D.protocol);
90 static ssize_t _show_name(struct device *dev,
91 struct device_attribute *attr, char *buf)
93 strcpy(buf, dev_name(dev));
94 return strlen(buf);
97 #if 0 /* hangs */
98 static ssize_t _set_name(struct device *dev, struct device_attribute *attr,
99 const char *buf, size_t count)
101 int err = 0;
102 char *out = kmalloc(count + 1, GFP_KERNEL);
104 if (!out)
105 return -ENOMEM;
107 memcpy(out, buf, count);
108 if (count && out[count - 1] == '\n')
109 out[--count] = 0;
110 if (count)
111 err = device_rename(dev, out);
112 kfree(out);
114 return (err < 0) ? err : count;
116 #endif
118 static ssize_t _show_channelmap(struct device *dev,
119 struct device_attribute *attr, char *buf)
121 struct mISDNdevice *mdev = dev_to_mISDN(dev);
122 char *bp = buf;
123 int i;
125 for (i = 0; i <= mdev->nrbchan; i++)
126 *bp++ = test_channelmap(i, mdev->channelmap) ? '1' : '0';
128 return bp - buf;
131 static struct device_attribute mISDN_dev_attrs[] = {
132 __ATTR(id, S_IRUGO, _show_id, NULL),
133 __ATTR(d_protocols, S_IRUGO, _show_d_protocols, NULL),
134 __ATTR(b_protocols, S_IRUGO, _show_b_protocols, NULL),
135 __ATTR(protocol, S_IRUGO, _show_protocol, NULL),
136 __ATTR(channelmap, S_IRUGO, _show_channelmap, NULL),
137 __ATTR(nrbchan, S_IRUGO, _show_nrbchan, NULL),
138 __ATTR(name, S_IRUGO, _show_name, NULL),
139 /* __ATTR(name, S_IRUGO|S_IWUSR, _show_name, _set_name), */
143 #ifdef CONFIG_HOTPLUG
144 static int mISDN_uevent(struct device *dev, struct kobj_uevent_env *env)
146 struct mISDNdevice *mdev = dev_to_mISDN(dev);
148 if (!mdev)
149 return 0;
151 if (add_uevent_var(env, "nchans=%d", mdev->nrbchan))
152 return -ENOMEM;
154 return 0;
156 #endif
158 static void mISDN_class_release(struct class *cls)
160 /* do nothing, it's static */
163 static struct class mISDN_class = {
164 .name = "mISDN",
165 .owner = THIS_MODULE,
166 #ifdef CONFIG_HOTPLUG
167 .dev_uevent = mISDN_uevent,
168 #endif
169 .dev_attrs = mISDN_dev_attrs,
170 .dev_release = mISDN_dev_release,
171 .class_release = mISDN_class_release,
174 static int
175 _get_mdevice(struct device *dev, void *id)
177 struct mISDNdevice *mdev = dev_to_mISDN(dev);
179 if (!mdev)
180 return 0;
181 if (mdev->id != *(u_int *)id)
182 return 0;
183 return 1;
186 struct mISDNdevice
187 *get_mdevice(u_int id)
189 return dev_to_mISDN(class_find_device(&mISDN_class, NULL, &id,
190 _get_mdevice));
193 static int
194 _get_mdevice_count(struct device *dev, void *cnt)
196 *(int *)cnt += 1;
197 return 0;
201 get_mdevice_count(void)
203 int cnt = 0;
205 class_for_each_device(&mISDN_class, NULL, &cnt, _get_mdevice_count);
206 return cnt;
209 static int
210 get_free_devid(void)
212 u_int i;
214 for (i = 0; i <= MAX_DEVICE_ID; i++)
215 if (!test_and_set_bit(i, (u_long *)&device_ids))
216 break;
217 if (i > MAX_DEVICE_ID)
218 return -EBUSY;
219 return i;
223 mISDN_register_device(struct mISDNdevice *dev,
224 struct device *parent, char *name)
226 int err;
228 err = get_free_devid();
229 if (err < 0)
230 goto error1;
231 dev->id = err;
233 device_initialize(&dev->dev);
234 if (name && name[0])
235 dev_set_name(&dev->dev, "%s", name);
236 else
237 dev_set_name(&dev->dev, "mISDN%d", dev->id);
238 if (debug & DEBUG_CORE)
239 printk(KERN_DEBUG "mISDN_register %s %d\n",
240 dev_name(&dev->dev), dev->id);
241 err = create_stack(dev);
242 if (err)
243 goto error1;
245 dev->dev.class = &mISDN_class;
246 dev->dev.platform_data = dev;
247 dev->dev.parent = parent;
248 dev_set_drvdata(&dev->dev, dev);
250 err = device_add(&dev->dev);
251 if (err)
252 goto error3;
253 return 0;
255 error3:
256 delete_stack(dev);
257 return err;
258 error1:
259 return err;
262 EXPORT_SYMBOL(mISDN_register_device);
264 void
265 mISDN_unregister_device(struct mISDNdevice *dev) {
266 if (debug & DEBUG_CORE)
267 printk(KERN_DEBUG "mISDN_unregister %s %d\n",
268 dev_name(&dev->dev), dev->id);
269 /* sysfs_remove_link(&dev->dev.kobj, "device"); */
270 device_del(&dev->dev);
271 dev_set_drvdata(&dev->dev, NULL);
273 test_and_clear_bit(dev->id, (u_long *)&device_ids);
274 delete_stack(dev);
275 put_device(&dev->dev);
277 EXPORT_SYMBOL(mISDN_unregister_device);
279 u_int
280 get_all_Bprotocols(void)
282 struct Bprotocol *bp;
283 u_int m = 0;
285 read_lock(&bp_lock);
286 list_for_each_entry(bp, &Bprotocols, list)
287 m |= bp->Bprotocols;
288 read_unlock(&bp_lock);
289 return m;
292 struct Bprotocol *
293 get_Bprotocol4mask(u_int m)
295 struct Bprotocol *bp;
297 read_lock(&bp_lock);
298 list_for_each_entry(bp, &Bprotocols, list)
299 if (bp->Bprotocols & m) {
300 read_unlock(&bp_lock);
301 return bp;
303 read_unlock(&bp_lock);
304 return NULL;
307 struct Bprotocol *
308 get_Bprotocol4id(u_int id)
310 u_int m;
312 if (id < ISDN_P_B_START || id > 63) {
313 printk(KERN_WARNING "%s id not in range %d\n",
314 __func__, id);
315 return NULL;
317 m = 1 << (id & ISDN_P_B_MASK);
318 return get_Bprotocol4mask(m);
322 mISDN_register_Bprotocol(struct Bprotocol *bp)
324 u_long flags;
325 struct Bprotocol *old;
327 if (debug & DEBUG_CORE)
328 printk(KERN_DEBUG "%s: %s/%x\n", __func__,
329 bp->name, bp->Bprotocols);
330 old = get_Bprotocol4mask(bp->Bprotocols);
331 if (old) {
332 printk(KERN_WARNING
333 "register duplicate protocol old %s/%x new %s/%x\n",
334 old->name, old->Bprotocols, bp->name, bp->Bprotocols);
335 return -EBUSY;
337 write_lock_irqsave(&bp_lock, flags);
338 list_add_tail(&bp->list, &Bprotocols);
339 write_unlock_irqrestore(&bp_lock, flags);
340 return 0;
342 EXPORT_SYMBOL(mISDN_register_Bprotocol);
344 void
345 mISDN_unregister_Bprotocol(struct Bprotocol *bp)
347 u_long flags;
349 if (debug & DEBUG_CORE)
350 printk(KERN_DEBUG "%s: %s/%x\n", __func__, bp->name,
351 bp->Bprotocols);
352 write_lock_irqsave(&bp_lock, flags);
353 list_del(&bp->list);
354 write_unlock_irqrestore(&bp_lock, flags);
356 EXPORT_SYMBOL(mISDN_unregister_Bprotocol);
358 static int
359 mISDNInit(void)
361 int err;
363 printk(KERN_INFO "Modular ISDN core version %d.%d.%d\n",
364 MISDN_MAJOR_VERSION, MISDN_MINOR_VERSION, MISDN_RELEASE);
365 mISDN_init_clock(&debug);
366 mISDN_initstack(&debug);
367 err = class_register(&mISDN_class);
368 if (err)
369 goto error1;
370 err = mISDN_inittimer(&debug);
371 if (err)
372 goto error2;
373 err = l1_init(&debug);
374 if (err)
375 goto error3;
376 err = Isdnl2_Init(&debug);
377 if (err)
378 goto error4;
379 err = misdn_sock_init(&debug);
380 if (err)
381 goto error5;
382 return 0;
384 error5:
385 Isdnl2_cleanup();
386 error4:
387 l1_cleanup();
388 error3:
389 mISDN_timer_cleanup();
390 error2:
391 class_unregister(&mISDN_class);
392 error1:
393 return err;
396 static void mISDN_cleanup(void)
398 misdn_sock_cleanup();
399 Isdnl2_cleanup();
400 l1_cleanup();
401 mISDN_timer_cleanup();
402 class_unregister(&mISDN_class);
404 printk(KERN_DEBUG "mISDNcore unloaded\n");
407 module_init(mISDNInit);
408 module_exit(mISDN_cleanup);