Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[linux-2.6] / drivers / media / video / pvrusb2 / pvrusb2-sysfs.c
1 /*
2  *
3  *  $Id$
4  *
5  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 2 of the License
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  *
20  */
21
22 #include <linux/string.h>
23 #include <linux/slab.h>
24 #include <asm/semaphore.h>
25 #include "pvrusb2-sysfs.h"
26 #include "pvrusb2-hdw.h"
27 #include "pvrusb2-debug.h"
28 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
29 #include "pvrusb2-debugifc.h"
30 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
31
32 #define pvr2_sysfs_trace(...) pvr2_trace(PVR2_TRACE_SYSFS,__VA_ARGS__)
33
34 struct pvr2_sysfs {
35         struct pvr2_channel channel;
36         struct device *class_dev;
37 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
38         struct pvr2_sysfs_debugifc *debugifc;
39 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
40         struct pvr2_sysfs_ctl_item *item_first;
41         struct pvr2_sysfs_ctl_item *item_last;
42         struct device_attribute attr_v4l_minor_number;
43         struct device_attribute attr_v4l_radio_minor_number;
44         struct device_attribute attr_unit_number;
45         struct device_attribute attr_bus_info;
46         int v4l_minor_number_created_ok;
47         int v4l_radio_minor_number_created_ok;
48         int unit_number_created_ok;
49         int bus_info_created_ok;
50 };
51
52 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
53 struct pvr2_sysfs_debugifc {
54         struct device_attribute attr_debugcmd;
55         struct device_attribute attr_debuginfo;
56         int debugcmd_created_ok;
57         int debuginfo_created_ok;
58 };
59 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
60
61 struct pvr2_sysfs_ctl_item {
62         struct device_attribute attr_name;
63         struct device_attribute attr_type;
64         struct device_attribute attr_min;
65         struct device_attribute attr_max;
66         struct device_attribute attr_enum;
67         struct device_attribute attr_bits;
68         struct device_attribute attr_val;
69         struct device_attribute attr_custom;
70         struct pvr2_ctrl *cptr;
71         struct pvr2_sysfs *chptr;
72         struct pvr2_sysfs_ctl_item *item_next;
73         struct attribute *attr_gen[7];
74         struct attribute_group grp;
75         int created_ok;
76         char name[80];
77 };
78
79 struct pvr2_sysfs_class {
80         struct class class;
81 };
82
83 static ssize_t show_name(int id,struct device *class_dev,char *buf)
84 {
85         struct pvr2_ctrl *cptr;
86         struct pvr2_sysfs *sfp;
87         const char *name;
88
89         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
90         if (!sfp) return -EINVAL;
91         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
92         if (!cptr) return -EINVAL;
93
94         name = pvr2_ctrl_get_desc(cptr);
95         pvr2_sysfs_trace("pvr2_sysfs(%p) show_name(cid=%d) is %s",sfp,id,name);
96
97         if (!name) return -EINVAL;
98
99         return scnprintf(buf,PAGE_SIZE,"%s\n",name);
100 }
101
102 static ssize_t show_type(int id,struct device *class_dev,char *buf)
103 {
104         struct pvr2_ctrl *cptr;
105         struct pvr2_sysfs *sfp;
106         const char *name;
107         enum pvr2_ctl_type tp;
108
109         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
110         if (!sfp) return -EINVAL;
111         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
112         if (!cptr) return -EINVAL;
113
114         tp = pvr2_ctrl_get_type(cptr);
115         switch (tp) {
116         case pvr2_ctl_int: name = "integer"; break;
117         case pvr2_ctl_enum: name = "enum"; break;
118         case pvr2_ctl_bitmask: name = "bitmask"; break;
119         case pvr2_ctl_bool: name = "boolean"; break;
120         default: name = "?"; break;
121         }
122         pvr2_sysfs_trace("pvr2_sysfs(%p) show_type(cid=%d) is %s",sfp,id,name);
123
124         if (!name) return -EINVAL;
125
126         return scnprintf(buf,PAGE_SIZE,"%s\n",name);
127 }
128
129 static ssize_t show_min(int id,struct device *class_dev,char *buf)
130 {
131         struct pvr2_ctrl *cptr;
132         struct pvr2_sysfs *sfp;
133         long val;
134
135         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
136         if (!sfp) return -EINVAL;
137         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
138         if (!cptr) return -EINVAL;
139         val = pvr2_ctrl_get_min(cptr);
140
141         pvr2_sysfs_trace("pvr2_sysfs(%p) show_min(cid=%d) is %ld",sfp,id,val);
142
143         return scnprintf(buf,PAGE_SIZE,"%ld\n",val);
144 }
145
146 static ssize_t show_max(int id,struct device *class_dev,char *buf)
147 {
148         struct pvr2_ctrl *cptr;
149         struct pvr2_sysfs *sfp;
150         long val;
151
152         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
153         if (!sfp) return -EINVAL;
154         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
155         if (!cptr) return -EINVAL;
156         val = pvr2_ctrl_get_max(cptr);
157
158         pvr2_sysfs_trace("pvr2_sysfs(%p) show_max(cid=%d) is %ld",sfp,id,val);
159
160         return scnprintf(buf,PAGE_SIZE,"%ld\n",val);
161 }
162
163 static ssize_t show_val_norm(int id,struct device *class_dev,char *buf)
164 {
165         struct pvr2_ctrl *cptr;
166         struct pvr2_sysfs *sfp;
167         int val,ret;
168         unsigned int cnt = 0;
169
170         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
171         if (!sfp) return -EINVAL;
172         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
173         if (!cptr) return -EINVAL;
174
175         ret = pvr2_ctrl_get_value(cptr,&val);
176         if (ret < 0) return ret;
177
178         ret = pvr2_ctrl_value_to_sym(cptr,~0,val,
179                                      buf,PAGE_SIZE-1,&cnt);
180
181         pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_norm(cid=%d) is %.*s (%d)",
182                          sfp,id,cnt,buf,val);
183         buf[cnt] = '\n';
184         return cnt+1;
185 }
186
187 static ssize_t show_val_custom(int id,struct device *class_dev,char *buf)
188 {
189         struct pvr2_ctrl *cptr;
190         struct pvr2_sysfs *sfp;
191         int val,ret;
192         unsigned int cnt = 0;
193
194         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
195         if (!sfp) return -EINVAL;
196         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
197         if (!cptr) return -EINVAL;
198
199         ret = pvr2_ctrl_get_value(cptr,&val);
200         if (ret < 0) return ret;
201
202         ret = pvr2_ctrl_custom_value_to_sym(cptr,~0,val,
203                                             buf,PAGE_SIZE-1,&cnt);
204
205         pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_custom(cid=%d) is %.*s (%d)",
206                          sfp,id,cnt,buf,val);
207         buf[cnt] = '\n';
208         return cnt+1;
209 }
210
211 static ssize_t show_enum(int id,struct device *class_dev,char *buf)
212 {
213         struct pvr2_ctrl *cptr;
214         struct pvr2_sysfs *sfp;
215         long val;
216         unsigned int bcnt,ccnt,ecnt;
217
218         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
219         if (!sfp) return -EINVAL;
220         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
221         if (!cptr) return -EINVAL;
222         ecnt = pvr2_ctrl_get_cnt(cptr);
223         bcnt = 0;
224         for (val = 0; val < ecnt; val++) {
225                 pvr2_ctrl_get_valname(cptr,val,buf+bcnt,PAGE_SIZE-bcnt,&ccnt);
226                 if (!ccnt) continue;
227                 bcnt += ccnt;
228                 if (bcnt >= PAGE_SIZE) break;
229                 buf[bcnt] = '\n';
230                 bcnt++;
231         }
232         pvr2_sysfs_trace("pvr2_sysfs(%p) show_enum(cid=%d)",sfp,id);
233         return bcnt;
234 }
235
236 static ssize_t show_bits(int id,struct device *class_dev,char *buf)
237 {
238         struct pvr2_ctrl *cptr;
239         struct pvr2_sysfs *sfp;
240         int valid_bits,msk;
241         unsigned int bcnt,ccnt;
242
243         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
244         if (!sfp) return -EINVAL;
245         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
246         if (!cptr) return -EINVAL;
247         valid_bits = pvr2_ctrl_get_mask(cptr);
248         bcnt = 0;
249         for (msk = 1; valid_bits; msk <<= 1) {
250                 if (!(msk & valid_bits)) continue;
251                 valid_bits &= ~msk;
252                 pvr2_ctrl_get_valname(cptr,msk,buf+bcnt,PAGE_SIZE-bcnt,&ccnt);
253                 bcnt += ccnt;
254                 if (bcnt >= PAGE_SIZE) break;
255                 buf[bcnt] = '\n';
256                 bcnt++;
257         }
258         pvr2_sysfs_trace("pvr2_sysfs(%p) show_bits(cid=%d)",sfp,id);
259         return bcnt;
260 }
261
262 static int store_val_any(int id,int customfl,struct pvr2_sysfs *sfp,
263                          const char *buf,unsigned int count)
264 {
265         struct pvr2_ctrl *cptr;
266         int ret;
267         int mask,val;
268
269         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
270         if (customfl) {
271                 ret = pvr2_ctrl_custom_sym_to_value(cptr,buf,count,&mask,&val);
272         } else {
273                 ret = pvr2_ctrl_sym_to_value(cptr,buf,count,&mask,&val);
274         }
275         if (ret < 0) return ret;
276         ret = pvr2_ctrl_set_mask_value(cptr,mask,val);
277         pvr2_hdw_commit_ctl(sfp->channel.hdw);
278         return ret;
279 }
280
281 static ssize_t store_val_norm(int id,struct device *class_dev,
282                              const char *buf,size_t count)
283 {
284         struct pvr2_sysfs *sfp;
285         int ret;
286         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
287         ret = store_val_any(id,0,sfp,buf,count);
288         if (!ret) ret = count;
289         return ret;
290 }
291
292 static ssize_t store_val_custom(int id,struct device *class_dev,
293                                 const char *buf,size_t count)
294 {
295         struct pvr2_sysfs *sfp;
296         int ret;
297         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
298         ret = store_val_any(id,1,sfp,buf,count);
299         if (!ret) ret = count;
300         return ret;
301 }
302
303 /*
304   Mike Isely <isely@pobox.com> 30-April-2005
305
306   This next batch of horrible preprocessor hackery is needed because the
307   kernel's device_attribute mechanism fails to pass the actual
308   attribute through to the show / store functions, which means we have no
309   way to package up any attribute-specific parameters, like for example the
310   control id.  So we work around this brain-damage by encoding the control
311   id into the show / store functions themselves and pick the function based
312   on the control id we're setting up.  These macros try to ease the pain.
313   Yuck.
314 */
315
316 #define CREATE_SHOW_INSTANCE(sf_name,ctl_id) \
317 static ssize_t sf_name##_##ctl_id(struct device *class_dev, \
318 struct device_attribute *attr, char *buf) \
319 { return sf_name(ctl_id,class_dev,buf); }
320
321 #define CREATE_STORE_INSTANCE(sf_name,ctl_id) \
322 static ssize_t sf_name##_##ctl_id(struct device *class_dev, \
323 struct device_attribute *attr, const char *buf, size_t count) \
324 { return sf_name(ctl_id,class_dev,buf,count); }
325
326 #define CREATE_BATCH(ctl_id) \
327 CREATE_SHOW_INSTANCE(show_name,ctl_id) \
328 CREATE_SHOW_INSTANCE(show_type,ctl_id) \
329 CREATE_SHOW_INSTANCE(show_min,ctl_id) \
330 CREATE_SHOW_INSTANCE(show_max,ctl_id) \
331 CREATE_SHOW_INSTANCE(show_val_norm,ctl_id) \
332 CREATE_SHOW_INSTANCE(show_val_custom,ctl_id) \
333 CREATE_SHOW_INSTANCE(show_enum,ctl_id) \
334 CREATE_SHOW_INSTANCE(show_bits,ctl_id) \
335 CREATE_STORE_INSTANCE(store_val_norm,ctl_id) \
336 CREATE_STORE_INSTANCE(store_val_custom,ctl_id) \
337
338 CREATE_BATCH(0)
339 CREATE_BATCH(1)
340 CREATE_BATCH(2)
341 CREATE_BATCH(3)
342 CREATE_BATCH(4)
343 CREATE_BATCH(5)
344 CREATE_BATCH(6)
345 CREATE_BATCH(7)
346 CREATE_BATCH(8)
347 CREATE_BATCH(9)
348 CREATE_BATCH(10)
349 CREATE_BATCH(11)
350 CREATE_BATCH(12)
351 CREATE_BATCH(13)
352 CREATE_BATCH(14)
353 CREATE_BATCH(15)
354 CREATE_BATCH(16)
355 CREATE_BATCH(17)
356 CREATE_BATCH(18)
357 CREATE_BATCH(19)
358 CREATE_BATCH(20)
359 CREATE_BATCH(21)
360 CREATE_BATCH(22)
361 CREATE_BATCH(23)
362 CREATE_BATCH(24)
363 CREATE_BATCH(25)
364 CREATE_BATCH(26)
365 CREATE_BATCH(27)
366 CREATE_BATCH(28)
367 CREATE_BATCH(29)
368 CREATE_BATCH(30)
369 CREATE_BATCH(31)
370 CREATE_BATCH(32)
371 CREATE_BATCH(33)
372 CREATE_BATCH(34)
373 CREATE_BATCH(35)
374 CREATE_BATCH(36)
375 CREATE_BATCH(37)
376 CREATE_BATCH(38)
377 CREATE_BATCH(39)
378 CREATE_BATCH(40)
379 CREATE_BATCH(41)
380 CREATE_BATCH(42)
381 CREATE_BATCH(43)
382 CREATE_BATCH(44)
383 CREATE_BATCH(45)
384 CREATE_BATCH(46)
385 CREATE_BATCH(47)
386 CREATE_BATCH(48)
387 CREATE_BATCH(49)
388 CREATE_BATCH(50)
389 CREATE_BATCH(51)
390 CREATE_BATCH(52)
391 CREATE_BATCH(53)
392 CREATE_BATCH(54)
393 CREATE_BATCH(55)
394 CREATE_BATCH(56)
395 CREATE_BATCH(57)
396 CREATE_BATCH(58)
397 CREATE_BATCH(59)
398
399 struct pvr2_sysfs_func_set {
400         ssize_t (*show_name)(struct device *,
401                              struct device_attribute *attr, char *);
402         ssize_t (*show_type)(struct device *,
403                              struct device_attribute *attr, char *);
404         ssize_t (*show_min)(struct device *,
405                             struct device_attribute *attr, char *);
406         ssize_t (*show_max)(struct device *,
407                             struct device_attribute *attr, char *);
408         ssize_t (*show_enum)(struct device *,
409                              struct device_attribute *attr, char *);
410         ssize_t (*show_bits)(struct device *,
411                              struct device_attribute *attr, char *);
412         ssize_t (*show_val_norm)(struct device *,
413                                  struct device_attribute *attr, char *);
414         ssize_t (*store_val_norm)(struct device *,
415                                   struct device_attribute *attr,
416                                   const char *,size_t);
417         ssize_t (*show_val_custom)(struct device *,
418                                    struct device_attribute *attr, char *);
419         ssize_t (*store_val_custom)(struct device *,
420                                     struct device_attribute *attr,
421                                     const char *,size_t);
422 };
423
424 #define INIT_BATCH(ctl_id) \
425 [ctl_id] = { \
426     .show_name = show_name_##ctl_id, \
427     .show_type = show_type_##ctl_id, \
428     .show_min = show_min_##ctl_id, \
429     .show_max = show_max_##ctl_id, \
430     .show_enum = show_enum_##ctl_id, \
431     .show_bits = show_bits_##ctl_id, \
432     .show_val_norm = show_val_norm_##ctl_id, \
433     .store_val_norm = store_val_norm_##ctl_id, \
434     .show_val_custom = show_val_custom_##ctl_id, \
435     .store_val_custom = store_val_custom_##ctl_id, \
436 } \
437
438 static struct pvr2_sysfs_func_set funcs[] = {
439         INIT_BATCH(0),
440         INIT_BATCH(1),
441         INIT_BATCH(2),
442         INIT_BATCH(3),
443         INIT_BATCH(4),
444         INIT_BATCH(5),
445         INIT_BATCH(6),
446         INIT_BATCH(7),
447         INIT_BATCH(8),
448         INIT_BATCH(9),
449         INIT_BATCH(10),
450         INIT_BATCH(11),
451         INIT_BATCH(12),
452         INIT_BATCH(13),
453         INIT_BATCH(14),
454         INIT_BATCH(15),
455         INIT_BATCH(16),
456         INIT_BATCH(17),
457         INIT_BATCH(18),
458         INIT_BATCH(19),
459         INIT_BATCH(20),
460         INIT_BATCH(21),
461         INIT_BATCH(22),
462         INIT_BATCH(23),
463         INIT_BATCH(24),
464         INIT_BATCH(25),
465         INIT_BATCH(26),
466         INIT_BATCH(27),
467         INIT_BATCH(28),
468         INIT_BATCH(29),
469         INIT_BATCH(30),
470         INIT_BATCH(31),
471         INIT_BATCH(32),
472         INIT_BATCH(33),
473         INIT_BATCH(34),
474         INIT_BATCH(35),
475         INIT_BATCH(36),
476         INIT_BATCH(37),
477         INIT_BATCH(38),
478         INIT_BATCH(39),
479         INIT_BATCH(40),
480         INIT_BATCH(41),
481         INIT_BATCH(42),
482         INIT_BATCH(43),
483         INIT_BATCH(44),
484         INIT_BATCH(45),
485         INIT_BATCH(46),
486         INIT_BATCH(47),
487         INIT_BATCH(48),
488         INIT_BATCH(49),
489         INIT_BATCH(50),
490         INIT_BATCH(51),
491         INIT_BATCH(52),
492         INIT_BATCH(53),
493         INIT_BATCH(54),
494         INIT_BATCH(55),
495         INIT_BATCH(56),
496         INIT_BATCH(57),
497         INIT_BATCH(58),
498         INIT_BATCH(59),
499 };
500
501
502 static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id)
503 {
504         struct pvr2_sysfs_ctl_item *cip;
505         struct pvr2_sysfs_func_set *fp;
506         struct pvr2_ctrl *cptr;
507         unsigned int cnt,acnt;
508         int ret;
509
510         if ((ctl_id < 0) || (ctl_id >= ARRAY_SIZE(funcs))) {
511                 return;
512         }
513
514         fp = funcs + ctl_id;
515         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,ctl_id);
516         if (!cptr) return;
517
518         cip = kzalloc(sizeof(*cip),GFP_KERNEL);
519         if (!cip) return;
520         pvr2_sysfs_trace("Creating pvr2_sysfs_ctl_item id=%p",cip);
521
522         cip->cptr = cptr;
523
524         cip->chptr = sfp;
525         cip->item_next = NULL;
526         if (sfp->item_last) {
527                 sfp->item_last->item_next = cip;
528         } else {
529                 sfp->item_first = cip;
530         }
531         sfp->item_last = cip;
532
533         cip->attr_name.attr.name = "name";
534         cip->attr_name.attr.mode = S_IRUGO;
535         cip->attr_name.show = fp->show_name;
536
537         cip->attr_type.attr.name = "type";
538         cip->attr_type.attr.mode = S_IRUGO;
539         cip->attr_type.show = fp->show_type;
540
541         cip->attr_min.attr.name = "min_val";
542         cip->attr_min.attr.mode = S_IRUGO;
543         cip->attr_min.show = fp->show_min;
544
545         cip->attr_max.attr.name = "max_val";
546         cip->attr_max.attr.mode = S_IRUGO;
547         cip->attr_max.show = fp->show_max;
548
549         cip->attr_val.attr.name = "cur_val";
550         cip->attr_val.attr.mode = S_IRUGO;
551
552         cip->attr_custom.attr.name = "custom_val";
553         cip->attr_custom.attr.mode = S_IRUGO;
554
555         cip->attr_enum.attr.name = "enum_val";
556         cip->attr_enum.attr.mode = S_IRUGO;
557         cip->attr_enum.show = fp->show_enum;
558
559         cip->attr_bits.attr.name = "bit_val";
560         cip->attr_bits.attr.mode = S_IRUGO;
561         cip->attr_bits.show = fp->show_bits;
562
563         if (pvr2_ctrl_is_writable(cptr)) {
564                 cip->attr_val.attr.mode |= S_IWUSR|S_IWGRP;
565                 cip->attr_custom.attr.mode |= S_IWUSR|S_IWGRP;
566         }
567
568         acnt = 0;
569         cip->attr_gen[acnt++] = &cip->attr_name.attr;
570         cip->attr_gen[acnt++] = &cip->attr_type.attr;
571         cip->attr_gen[acnt++] = &cip->attr_val.attr;
572         cip->attr_val.show = fp->show_val_norm;
573         cip->attr_val.store = fp->store_val_norm;
574         if (pvr2_ctrl_has_custom_symbols(cptr)) {
575                 cip->attr_gen[acnt++] = &cip->attr_custom.attr;
576                 cip->attr_custom.show = fp->show_val_custom;
577                 cip->attr_custom.store = fp->store_val_custom;
578         }
579         switch (pvr2_ctrl_get_type(cptr)) {
580         case pvr2_ctl_enum:
581                 // Control is an enumeration
582                 cip->attr_gen[acnt++] = &cip->attr_enum.attr;
583                 break;
584         case pvr2_ctl_int:
585                 // Control is an integer
586                 cip->attr_gen[acnt++] = &cip->attr_min.attr;
587                 cip->attr_gen[acnt++] = &cip->attr_max.attr;
588                 break;
589         case pvr2_ctl_bitmask:
590                 // Control is an bitmask
591                 cip->attr_gen[acnt++] = &cip->attr_bits.attr;
592                 break;
593         default: break;
594         }
595
596         cnt = scnprintf(cip->name,sizeof(cip->name)-1,"ctl_%s",
597                         pvr2_ctrl_get_name(cptr));
598         cip->name[cnt] = 0;
599         cip->grp.name = cip->name;
600         cip->grp.attrs = cip->attr_gen;
601
602         ret = sysfs_create_group(&sfp->class_dev->kobj,&cip->grp);
603         if (ret) {
604                 printk(KERN_WARNING "%s: sysfs_create_group error: %d\n",
605                        __FUNCTION__, ret);
606                 return;
607         }
608         cip->created_ok = !0;
609 }
610
611 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
612 static ssize_t debuginfo_show(struct device *, struct device_attribute *,
613                               char *);
614 static ssize_t debugcmd_show(struct device *, struct device_attribute *,
615                              char *);
616 static ssize_t debugcmd_store(struct device *, struct device_attribute *,
617                               const char *, size_t count);
618
619 static void pvr2_sysfs_add_debugifc(struct pvr2_sysfs *sfp)
620 {
621         struct pvr2_sysfs_debugifc *dip;
622         int ret;
623
624         dip = kzalloc(sizeof(*dip),GFP_KERNEL);
625         if (!dip) return;
626         dip->attr_debugcmd.attr.name = "debugcmd";
627         dip->attr_debugcmd.attr.mode = S_IRUGO|S_IWUSR|S_IWGRP;
628         dip->attr_debugcmd.show = debugcmd_show;
629         dip->attr_debugcmd.store = debugcmd_store;
630         dip->attr_debuginfo.attr.name = "debuginfo";
631         dip->attr_debuginfo.attr.mode = S_IRUGO;
632         dip->attr_debuginfo.show = debuginfo_show;
633         sfp->debugifc = dip;
634         ret = device_create_file(sfp->class_dev,&dip->attr_debugcmd);
635         if (ret < 0) {
636                 printk(KERN_WARNING "%s: device_create_file error: %d\n",
637                        __FUNCTION__, ret);
638         } else {
639                 dip->debugcmd_created_ok = !0;
640         }
641         ret = device_create_file(sfp->class_dev,&dip->attr_debuginfo);
642         if (ret < 0) {
643                 printk(KERN_WARNING "%s: device_create_file error: %d\n",
644                        __FUNCTION__, ret);
645         } else {
646                 dip->debuginfo_created_ok = !0;
647         }
648 }
649
650
651 static void pvr2_sysfs_tear_down_debugifc(struct pvr2_sysfs *sfp)
652 {
653         if (!sfp->debugifc) return;
654         if (sfp->debugifc->debuginfo_created_ok) {
655                 device_remove_file(sfp->class_dev,
656                                          &sfp->debugifc->attr_debuginfo);
657         }
658         if (sfp->debugifc->debugcmd_created_ok) {
659                 device_remove_file(sfp->class_dev,
660                                          &sfp->debugifc->attr_debugcmd);
661         }
662         kfree(sfp->debugifc);
663         sfp->debugifc = NULL;
664 }
665 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
666
667
668 static void pvr2_sysfs_add_controls(struct pvr2_sysfs *sfp)
669 {
670         unsigned int idx,cnt;
671         cnt = pvr2_hdw_get_ctrl_count(sfp->channel.hdw);
672         for (idx = 0; idx < cnt; idx++) {
673                 pvr2_sysfs_add_control(sfp,idx);
674         }
675 }
676
677
678 static void pvr2_sysfs_tear_down_controls(struct pvr2_sysfs *sfp)
679 {
680         struct pvr2_sysfs_ctl_item *cip1,*cip2;
681         for (cip1 = sfp->item_first; cip1; cip1 = cip2) {
682                 cip2 = cip1->item_next;
683                 if (cip1->created_ok) {
684                         sysfs_remove_group(&sfp->class_dev->kobj,&cip1->grp);
685                 }
686                 pvr2_sysfs_trace("Destroying pvr2_sysfs_ctl_item id=%p",cip1);
687                 kfree(cip1);
688         }
689 }
690
691
692 static void pvr2_sysfs_class_release(struct class *class)
693 {
694         struct pvr2_sysfs_class *clp;
695         clp = container_of(class,struct pvr2_sysfs_class,class);
696         pvr2_sysfs_trace("Destroying pvr2_sysfs_class id=%p",clp);
697         kfree(clp);
698 }
699
700
701 static void pvr2_sysfs_release(struct device *class_dev)
702 {
703         pvr2_sysfs_trace("Releasing class_dev id=%p",class_dev);
704         kfree(class_dev);
705 }
706
707
708 static void class_dev_destroy(struct pvr2_sysfs *sfp)
709 {
710         if (!sfp->class_dev) return;
711 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
712         pvr2_sysfs_tear_down_debugifc(sfp);
713 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
714         pvr2_sysfs_tear_down_controls(sfp);
715         if (sfp->bus_info_created_ok) {
716                 device_remove_file(sfp->class_dev,
717                                          &sfp->attr_bus_info);
718         }
719         if (sfp->v4l_minor_number_created_ok) {
720                 device_remove_file(sfp->class_dev,
721                                          &sfp->attr_v4l_minor_number);
722         }
723         if (sfp->v4l_radio_minor_number_created_ok) {
724                 device_remove_file(sfp->class_dev,
725                                          &sfp->attr_v4l_radio_minor_number);
726         }
727         if (sfp->unit_number_created_ok) {
728                 device_remove_file(sfp->class_dev,
729                                          &sfp->attr_unit_number);
730         }
731         pvr2_sysfs_trace("Destroying class_dev id=%p",sfp->class_dev);
732         sfp->class_dev->driver_data = NULL;
733         device_unregister(sfp->class_dev);
734         sfp->class_dev = NULL;
735 }
736
737
738 static ssize_t v4l_minor_number_show(struct device *class_dev,
739                                      struct device_attribute *attr, char *buf)
740 {
741         struct pvr2_sysfs *sfp;
742         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
743         if (!sfp) return -EINVAL;
744         return scnprintf(buf,PAGE_SIZE,"%d\n",
745                          pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
746                                                        pvr2_v4l_type_video));
747 }
748
749
750 static ssize_t bus_info_show(struct device *class_dev,
751                              struct device_attribute *attr, char *buf)
752 {
753         struct pvr2_sysfs *sfp;
754         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
755         if (!sfp) return -EINVAL;
756         return scnprintf(buf,PAGE_SIZE,"%s\n",
757                          pvr2_hdw_get_bus_info(sfp->channel.hdw));
758 }
759
760
761 static ssize_t v4l_radio_minor_number_show(struct device *class_dev,
762                                            struct device_attribute *attr,
763                                            char *buf)
764 {
765         struct pvr2_sysfs *sfp;
766         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
767         if (!sfp) return -EINVAL;
768         return scnprintf(buf,PAGE_SIZE,"%d\n",
769                          pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
770                                                        pvr2_v4l_type_radio));
771 }
772
773
774 static ssize_t unit_number_show(struct device *class_dev,
775                                 struct device_attribute *attr, char *buf)
776 {
777         struct pvr2_sysfs *sfp;
778         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
779         if (!sfp) return -EINVAL;
780         return scnprintf(buf,PAGE_SIZE,"%d\n",
781                          pvr2_hdw_get_unit_number(sfp->channel.hdw));
782 }
783
784
785 static void class_dev_create(struct pvr2_sysfs *sfp,
786                              struct pvr2_sysfs_class *class_ptr)
787 {
788         struct usb_device *usb_dev;
789         struct device *class_dev;
790         int ret;
791
792         usb_dev = pvr2_hdw_get_dev(sfp->channel.hdw);
793         if (!usb_dev) return;
794         class_dev = kzalloc(sizeof(*class_dev),GFP_KERNEL);
795         if (!class_dev) return;
796
797         pvr2_sysfs_trace("Creating class_dev id=%p",class_dev);
798
799         class_dev->class = &class_ptr->class;
800         if (pvr2_hdw_get_sn(sfp->channel.hdw)) {
801                 snprintf(class_dev->bus_id, BUS_ID_SIZE, "sn-%lu",
802                          pvr2_hdw_get_sn(sfp->channel.hdw));
803         } else if (pvr2_hdw_get_unit_number(sfp->channel.hdw) >= 0) {
804                 snprintf(class_dev->bus_id, BUS_ID_SIZE, "unit-%c",
805                          pvr2_hdw_get_unit_number(sfp->channel.hdw) + 'a');
806         } else {
807                 kfree(class_dev);
808                 return;
809         }
810
811         class_dev->parent = &usb_dev->dev;
812
813         sfp->class_dev = class_dev;
814         class_dev->driver_data = sfp;
815         ret = device_register(class_dev);
816         if (ret) {
817                 printk(KERN_ERR "%s: device_register failed\n",
818                        __FUNCTION__);
819                 kfree(class_dev);
820                 return;
821         }
822
823         sfp->attr_v4l_minor_number.attr.name = "v4l_minor_number";
824         sfp->attr_v4l_minor_number.attr.mode = S_IRUGO;
825         sfp->attr_v4l_minor_number.show = v4l_minor_number_show;
826         sfp->attr_v4l_minor_number.store = NULL;
827         ret = device_create_file(sfp->class_dev,
828                                        &sfp->attr_v4l_minor_number);
829         if (ret < 0) {
830                 printk(KERN_WARNING "%s: device_create_file error: %d\n",
831                        __FUNCTION__, ret);
832         } else {
833                 sfp->v4l_minor_number_created_ok = !0;
834         }
835
836         sfp->attr_v4l_radio_minor_number.attr.name = "v4l_radio_minor_number";
837         sfp->attr_v4l_radio_minor_number.attr.mode = S_IRUGO;
838         sfp->attr_v4l_radio_minor_number.show = v4l_radio_minor_number_show;
839         sfp->attr_v4l_radio_minor_number.store = NULL;
840         ret = device_create_file(sfp->class_dev,
841                                        &sfp->attr_v4l_radio_minor_number);
842         if (ret < 0) {
843                 printk(KERN_WARNING "%s: device_create_file error: %d\n",
844                        __FUNCTION__, ret);
845         } else {
846                 sfp->v4l_radio_minor_number_created_ok = !0;
847         }
848
849         sfp->attr_unit_number.attr.name = "unit_number";
850         sfp->attr_unit_number.attr.mode = S_IRUGO;
851         sfp->attr_unit_number.show = unit_number_show;
852         sfp->attr_unit_number.store = NULL;
853         ret = device_create_file(sfp->class_dev,&sfp->attr_unit_number);
854         if (ret < 0) {
855                 printk(KERN_WARNING "%s: device_create_file error: %d\n",
856                        __FUNCTION__, ret);
857         } else {
858                 sfp->unit_number_created_ok = !0;
859         }
860
861         sfp->attr_bus_info.attr.name = "bus_info_str";
862         sfp->attr_bus_info.attr.mode = S_IRUGO;
863         sfp->attr_bus_info.show = bus_info_show;
864         sfp->attr_bus_info.store = NULL;
865         ret = device_create_file(sfp->class_dev,
866                                        &sfp->attr_bus_info);
867         if (ret < 0) {
868                 printk(KERN_WARNING "%s: device_create_file error: %d\n",
869                        __FUNCTION__, ret);
870         } else {
871                 sfp->bus_info_created_ok = !0;
872         }
873
874         pvr2_sysfs_add_controls(sfp);
875 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
876         pvr2_sysfs_add_debugifc(sfp);
877 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
878 }
879
880
881 static void pvr2_sysfs_internal_check(struct pvr2_channel *chp)
882 {
883         struct pvr2_sysfs *sfp;
884         sfp = container_of(chp,struct pvr2_sysfs,channel);
885         if (!sfp->channel.mc_head->disconnect_flag) return;
886         pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_sysfs id=%p",sfp);
887         class_dev_destroy(sfp);
888         pvr2_channel_done(&sfp->channel);
889         kfree(sfp);
890 }
891
892
893 struct pvr2_sysfs *pvr2_sysfs_create(struct pvr2_context *mp,
894                                      struct pvr2_sysfs_class *class_ptr)
895 {
896         struct pvr2_sysfs *sfp;
897         sfp = kzalloc(sizeof(*sfp),GFP_KERNEL);
898         if (!sfp) return sfp;
899         pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_sysfs id=%p",sfp);
900         pvr2_channel_init(&sfp->channel,mp);
901         sfp->channel.check_func = pvr2_sysfs_internal_check;
902
903         class_dev_create(sfp,class_ptr);
904         return sfp;
905 }
906
907
908 static int pvr2_sysfs_hotplug(struct device *cd,char **envp,
909                               int numenvp,char *buf,int size)
910 {
911         /* Even though we don't do anything here, we still need this function
912            because sysfs will still try to call it. */
913         return 0;
914 }
915
916 struct pvr2_sysfs_class *pvr2_sysfs_class_create(void)
917 {
918         struct pvr2_sysfs_class *clp;
919         clp = kzalloc(sizeof(*clp),GFP_KERNEL);
920         if (!clp) return clp;
921         pvr2_sysfs_trace("Creating pvr2_sysfs_class id=%p",clp);
922         clp->class.name = "pvrusb2";
923         clp->class.class_release = pvr2_sysfs_class_release;
924         clp->class.dev_release = pvr2_sysfs_release;
925         clp->class.dev_uevent = pvr2_sysfs_hotplug;
926         if (class_register(&clp->class)) {
927                 pvr2_sysfs_trace(
928                         "Registration failed for pvr2_sysfs_class id=%p",clp);
929                 kfree(clp);
930                 clp = NULL;
931         }
932         return clp;
933 }
934
935
936 void pvr2_sysfs_class_destroy(struct pvr2_sysfs_class *clp)
937 {
938         class_unregister(&clp->class);
939 }
940
941
942 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
943 static ssize_t debuginfo_show(struct device *class_dev,
944                               struct device_attribute *attr, char *buf)
945 {
946         struct pvr2_sysfs *sfp;
947         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
948         if (!sfp) return -EINVAL;
949         pvr2_hdw_trigger_module_log(sfp->channel.hdw);
950         return pvr2_debugifc_print_info(sfp->channel.hdw,buf,PAGE_SIZE);
951 }
952
953
954 static ssize_t debugcmd_show(struct device *class_dev,
955                              struct device_attribute *attr, char *buf)
956 {
957         struct pvr2_sysfs *sfp;
958         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
959         if (!sfp) return -EINVAL;
960         return pvr2_debugifc_print_status(sfp->channel.hdw,buf,PAGE_SIZE);
961 }
962
963
964 static ssize_t debugcmd_store(struct device *class_dev,
965                               struct device_attribute *attr,
966                               const char *buf, size_t count)
967 {
968         struct pvr2_sysfs *sfp;
969         int ret;
970
971         sfp = (struct pvr2_sysfs *)class_dev->driver_data;
972         if (!sfp) return -EINVAL;
973
974         ret = pvr2_debugifc_docmd(sfp->channel.hdw,buf,count);
975         if (ret < 0) return ret;
976         return count;
977 }
978 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
979
980
981 /*
982   Stuff for Emacs to see, in order to encourage consistent editing style:
983   *** Local Variables: ***
984   *** mode: c ***
985   *** fill-column: 75 ***
986   *** tab-width: 8 ***
987   *** c-basic-offset: 8 ***
988   *** End: ***
989   */