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 class_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 class_device_attribute attr_v4l_minor_number;
  43         struct class_device_attribute attr_v4l_radio_minor_number;
  44         struct class_device_attribute attr_unit_number;
  45         struct class_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 class_device_attribute attr_debugcmd;
  55         struct class_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 class_device_attribute attr_name;
  63         struct class_device_attribute attr_type;
  64         struct class_device_attribute attr_min;
  65         struct class_device_attribute attr_max;
  66         struct class_device_attribute attr_enum;
  67         struct class_device_attribute attr_bits;
  68         struct class_device_attribute attr_val;
  69         struct class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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->class_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 class_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 class_device *class_dev,char *buf) \
 318 { return sf_name(ctl_id,class_dev,buf); }
 319
 320 #define CREATE_STORE_INSTANCE(sf_name,ctl_id) \
 321 static ssize_t sf_name##_##ctl_id(struct class_device *class_dev,const char *buf,size_t count) \
 322 { return sf_name(ctl_id,class_dev,buf,count); }
 323
 324 #define CREATE_BATCH(ctl_id) \
 325 CREATE_SHOW_INSTANCE(show_name,ctl_id) \
 326 CREATE_SHOW_INSTANCE(show_type,ctl_id) \
 327 CREATE_SHOW_INSTANCE(show_min,ctl_id) \
 328 CREATE_SHOW_INSTANCE(show_max,ctl_id) \
 329 CREATE_SHOW_INSTANCE(show_val_norm,ctl_id) \
 330 CREATE_SHOW_INSTANCE(show_val_custom,ctl_id) \
 331 CREATE_SHOW_INSTANCE(show_enum,ctl_id) \
 332 CREATE_SHOW_INSTANCE(show_bits,ctl_id) \
 333 CREATE_STORE_INSTANCE(store_val_norm,ctl_id) \
 334 CREATE_STORE_INSTANCE(store_val_custom,ctl_id) \
 335
 336 CREATE_BATCH(0)
 337 CREATE_BATCH(1)
 338 CREATE_BATCH(2)
 339 CREATE_BATCH(3)
 340 CREATE_BATCH(4)
 341 CREATE_BATCH(5)
 342 CREATE_BATCH(6)
 343 CREATE_BATCH(7)
 344 CREATE_BATCH(8)
 345 CREATE_BATCH(9)
 346 CREATE_BATCH(10)
 347 CREATE_BATCH(11)
 348 CREATE_BATCH(12)
 349 CREATE_BATCH(13)
 350 CREATE_BATCH(14)
 351 CREATE_BATCH(15)
 352 CREATE_BATCH(16)
 353 CREATE_BATCH(17)
 354 CREATE_BATCH(18)
 355 CREATE_BATCH(19)
 356 CREATE_BATCH(20)
 357 CREATE_BATCH(21)
 358 CREATE_BATCH(22)
 359 CREATE_BATCH(23)
 360 CREATE_BATCH(24)
 361 CREATE_BATCH(25)
 362 CREATE_BATCH(26)
 363 CREATE_BATCH(27)
 364 CREATE_BATCH(28)
 365 CREATE_BATCH(29)
 366 CREATE_BATCH(30)
 367 CREATE_BATCH(31)
 368 CREATE_BATCH(32)
 369 CREATE_BATCH(33)
 370 CREATE_BATCH(34)
 371 CREATE_BATCH(35)
 372 CREATE_BATCH(36)
 373 CREATE_BATCH(37)
 374 CREATE_BATCH(38)
 375 CREATE_BATCH(39)
 376 CREATE_BATCH(40)
 377 CREATE_BATCH(41)
 378 CREATE_BATCH(42)
 379 CREATE_BATCH(43)
 380 CREATE_BATCH(44)
 381 CREATE_BATCH(45)
 382 CREATE_BATCH(46)
 383 CREATE_BATCH(47)
 384 CREATE_BATCH(48)
 385 CREATE_BATCH(49)
 386 CREATE_BATCH(50)
 387 CREATE_BATCH(51)
 388 CREATE_BATCH(52)
 389 CREATE_BATCH(53)
 390 CREATE_BATCH(54)
 391 CREATE_BATCH(55)
 392 CREATE_BATCH(56)
 393 CREATE_BATCH(57)
 394 CREATE_BATCH(58)
 395 CREATE_BATCH(59)
 396
 397 struct pvr2_sysfs_func_set {
 398         ssize_t (*show_name)(struct class_device *,char *);
 399         ssize_t (*show_type)(struct class_device *,char *);
 400         ssize_t (*show_min)(struct class_device *,char *);
 401         ssize_t (*show_max)(struct class_device *,char *);
 402         ssize_t (*show_enum)(struct class_device *,char *);
 403         ssize_t (*show_bits)(struct class_device *,char *);
 404         ssize_t (*show_val_norm)(struct class_device *,char *);
 405         ssize_t (*store_val_norm)(struct class_device *,
 406                                   const char *,size_t);
 407         ssize_t (*show_val_custom)(struct class_device *,char *);
 408         ssize_t (*store_val_custom)(struct class_device *,
 409                                     const char *,size_t);
 410 };
 411
 412 #define INIT_BATCH(ctl_id) \
 413 [ctl_id] = { \
 414     .show_name = show_name_##ctl_id, \
 415     .show_type = show_type_##ctl_id, \
 416     .show_min = show_min_##ctl_id, \
 417     .show_max = show_max_##ctl_id, \
 418     .show_enum = show_enum_##ctl_id, \
 419     .show_bits = show_bits_##ctl_id, \
 420     .show_val_norm = show_val_norm_##ctl_id, \
 421     .store_val_norm = store_val_norm_##ctl_id, \
 422     .show_val_custom = show_val_custom_##ctl_id, \
 423     .store_val_custom = store_val_custom_##ctl_id, \
 424 } \
 425
 426 static struct pvr2_sysfs_func_set funcs[] = {
 427         INIT_BATCH(0),
 428         INIT_BATCH(1),
 429         INIT_BATCH(2),
 430         INIT_BATCH(3),
 431         INIT_BATCH(4),
 432         INIT_BATCH(5),
 433         INIT_BATCH(6),
 434         INIT_BATCH(7),
 435         INIT_BATCH(8),
 436         INIT_BATCH(9),
 437         INIT_BATCH(10),
 438         INIT_BATCH(11),
 439         INIT_BATCH(12),
 440         INIT_BATCH(13),
 441         INIT_BATCH(14),
 442         INIT_BATCH(15),
 443         INIT_BATCH(16),
 444         INIT_BATCH(17),
 445         INIT_BATCH(18),
 446         INIT_BATCH(19),
 447         INIT_BATCH(20),
 448         INIT_BATCH(21),
 449         INIT_BATCH(22),
 450         INIT_BATCH(23),
 451         INIT_BATCH(24),
 452         INIT_BATCH(25),
 453         INIT_BATCH(26),
 454         INIT_BATCH(27),
 455         INIT_BATCH(28),
 456         INIT_BATCH(29),
 457         INIT_BATCH(30),
 458         INIT_BATCH(31),
 459         INIT_BATCH(32),
 460         INIT_BATCH(33),
 461         INIT_BATCH(34),
 462         INIT_BATCH(35),
 463         INIT_BATCH(36),
 464         INIT_BATCH(37),
 465         INIT_BATCH(38),
 466         INIT_BATCH(39),
 467         INIT_BATCH(40),
 468         INIT_BATCH(41),
 469         INIT_BATCH(42),
 470         INIT_BATCH(43),
 471         INIT_BATCH(44),
 472         INIT_BATCH(45),
 473         INIT_BATCH(46),
 474         INIT_BATCH(47),
 475         INIT_BATCH(48),
 476         INIT_BATCH(49),
 477         INIT_BATCH(50),
 478         INIT_BATCH(51),
 479         INIT_BATCH(52),
 480         INIT_BATCH(53),
 481         INIT_BATCH(54),
 482         INIT_BATCH(55),
 483         INIT_BATCH(56),
 484         INIT_BATCH(57),
 485         INIT_BATCH(58),
 486         INIT_BATCH(59),
 487 };
 488
 489
 490 static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id)
 491 {
 492         struct pvr2_sysfs_ctl_item *cip;
 493         struct pvr2_sysfs_func_set *fp;
 494         struct pvr2_ctrl *cptr;
 495         unsigned int cnt,acnt;
 496         int ret;
 497
 498         if ((ctl_id < 0) || (ctl_id >= ARRAY_SIZE(funcs))) {
 499                 return;
 500         }
 501
 502         fp = funcs + ctl_id;
 503         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,ctl_id);
 504         if (!cptr) return;
 505
 506         cip = kzalloc(sizeof(*cip),GFP_KERNEL);
 507         if (!cip) return;
 508         pvr2_sysfs_trace("Creating pvr2_sysfs_ctl_item id=%p",cip);
 509
 510         cip->cptr = cptr;
 511
 512         cip->chptr = sfp;
 513         cip->item_next = NULL;
 514         if (sfp->item_last) {
 515                 sfp->item_last->item_next = cip;
 516         } else {
 517                 sfp->item_first = cip;
 518         }
 519         sfp->item_last = cip;
 520
 521         cip->attr_name.attr.name = "name";
 522         cip->attr_name.attr.mode = S_IRUGO;
 523         cip->attr_name.show = fp->show_name;
 524
 525         cip->attr_type.attr.name = "type";
 526         cip->attr_type.attr.mode = S_IRUGO;
 527         cip->attr_type.show = fp->show_type;
 528
 529         cip->attr_min.attr.name = "min_val";
 530         cip->attr_min.attr.mode = S_IRUGO;
 531         cip->attr_min.show = fp->show_min;
 532
 533         cip->attr_max.attr.name = "max_val";
 534         cip->attr_max.attr.mode = S_IRUGO;
 535         cip->attr_max.show = fp->show_max;
 536
 537         cip->attr_val.attr.name = "cur_val";
 538         cip->attr_val.attr.mode = S_IRUGO;
 539
 540         cip->attr_custom.attr.name = "custom_val";
 541         cip->attr_custom.attr.mode = S_IRUGO;
 542
 543         cip->attr_enum.attr.name = "enum_val";
 544         cip->attr_enum.attr.mode = S_IRUGO;
 545         cip->attr_enum.show = fp->show_enum;
 546
 547         cip->attr_bits.attr.name = "bit_val";
 548         cip->attr_bits.attr.mode = S_IRUGO;
 549         cip->attr_bits.show = fp->show_bits;
 550
 551         if (pvr2_ctrl_is_writable(cptr)) {
 552                 cip->attr_val.attr.mode |= S_IWUSR|S_IWGRP;
 553                 cip->attr_custom.attr.mode |= S_IWUSR|S_IWGRP;
 554         }
 555
 556         acnt = 0;
 557         cip->attr_gen[acnt++] = &cip->attr_name.attr;
 558         cip->attr_gen[acnt++] = &cip->attr_type.attr;
 559         cip->attr_gen[acnt++] = &cip->attr_val.attr;
 560         cip->attr_val.show = fp->show_val_norm;
 561         cip->attr_val.store = fp->store_val_norm;
 562         if (pvr2_ctrl_has_custom_symbols(cptr)) {
 563                 cip->attr_gen[acnt++] = &cip->attr_custom.attr;
 564                 cip->attr_custom.show = fp->show_val_custom;
 565                 cip->attr_custom.store = fp->store_val_custom;
 566         }
 567         switch (pvr2_ctrl_get_type(cptr)) {
 568         case pvr2_ctl_enum:
 569                 // Control is an enumeration
 570                 cip->attr_gen[acnt++] = &cip->attr_enum.attr;
 571                 break;
 572         case pvr2_ctl_int:
 573                 // Control is an integer
 574                 cip->attr_gen[acnt++] = &cip->attr_min.attr;
 575                 cip->attr_gen[acnt++] = &cip->attr_max.attr;
 576                 break;
 577         case pvr2_ctl_bitmask:
 578                 // Control is an bitmask
 579                 cip->attr_gen[acnt++] = &cip->attr_bits.attr;
 580                 break;
 581         default: break;
 582         }
 583
 584         cnt = scnprintf(cip->name,sizeof(cip->name)-1,"ctl_%s",
 585                         pvr2_ctrl_get_name(cptr));
 586         cip->name[cnt] = 0;
 587         cip->grp.name = cip->name;
 588         cip->grp.attrs = cip->attr_gen;
 589
 590         ret = sysfs_create_group(&sfp->class_dev->kobj,&cip->grp);
 591         if (ret) {
 592                 printk(KERN_WARNING "%s: sysfs_create_group error: %d\n",
 593                        __FUNCTION__, ret);
 594                 return;
 595         }
 596         cip->created_ok = !0;
 597 }
 598
 599 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 600 static ssize_t debuginfo_show(struct class_device *,char *);
 601 static ssize_t debugcmd_show(struct class_device *,char *);
 602 static ssize_t debugcmd_store(struct class_device *,const char *,size_t count);
 603
 604 static void pvr2_sysfs_add_debugifc(struct pvr2_sysfs *sfp)
 605 {
 606         struct pvr2_sysfs_debugifc *dip;
 607         int ret;
 608
 609         dip = kzalloc(sizeof(*dip),GFP_KERNEL);
 610         if (!dip) return;
 611         dip->attr_debugcmd.attr.name = "debugcmd";
 612         dip->attr_debugcmd.attr.mode = S_IRUGO|S_IWUSR|S_IWGRP;
 613         dip->attr_debugcmd.show = debugcmd_show;
 614         dip->attr_debugcmd.store = debugcmd_store;
 615         dip->attr_debuginfo.attr.name = "debuginfo";
 616         dip->attr_debuginfo.attr.mode = S_IRUGO;
 617         dip->attr_debuginfo.show = debuginfo_show;
 618         sfp->debugifc = dip;
 619         ret = class_device_create_file(sfp->class_dev,&dip->attr_debugcmd);
 620         if (ret < 0) {
 621                 printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
 622                        __FUNCTION__, ret);
 623         } else {
 624                 dip->debugcmd_created_ok = !0;
 625         }
 626         ret = class_device_create_file(sfp->class_dev,&dip->attr_debuginfo);
 627         if (ret < 0) {
 628                 printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
 629                        __FUNCTION__, ret);
 630         } else {
 631                 dip->debuginfo_created_ok = !0;
 632         }
 633 }
 634
 635
 636 static void pvr2_sysfs_tear_down_debugifc(struct pvr2_sysfs *sfp)
 637 {
 638         if (!sfp->debugifc) return;
 639         if (sfp->debugifc->debuginfo_created_ok) {
 640                 class_device_remove_file(sfp->class_dev,
 641                                          &sfp->debugifc->attr_debuginfo);
 642         }
 643         if (sfp->debugifc->debugcmd_created_ok) {
 644                 class_device_remove_file(sfp->class_dev,
 645                                          &sfp->debugifc->attr_debugcmd);
 646         }
 647         kfree(sfp->debugifc);
 648         sfp->debugifc = NULL;
 649 }
 650 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 651
 652
 653 static void pvr2_sysfs_add_controls(struct pvr2_sysfs *sfp)
 654 {
 655         unsigned int idx,cnt;
 656         cnt = pvr2_hdw_get_ctrl_count(sfp->channel.hdw);
 657         for (idx = 0; idx < cnt; idx++) {
 658                 pvr2_sysfs_add_control(sfp,idx);
 659         }
 660 }
 661
 662
 663 static void pvr2_sysfs_tear_down_controls(struct pvr2_sysfs *sfp)
 664 {
 665         struct pvr2_sysfs_ctl_item *cip1,*cip2;
 666         for (cip1 = sfp->item_first; cip1; cip1 = cip2) {
 667                 cip2 = cip1->item_next;
 668                 if (cip1->created_ok) {
 669                         sysfs_remove_group(&sfp->class_dev->kobj,&cip1->grp);
 670                 }
 671                 pvr2_sysfs_trace("Destroying pvr2_sysfs_ctl_item id=%p",cip1);
 672                 kfree(cip1);
 673         }
 674 }
 675
 676
 677 static void pvr2_sysfs_class_release(struct class *class)
 678 {
 679         struct pvr2_sysfs_class *clp;
 680         clp = container_of(class,struct pvr2_sysfs_class,class);
 681         pvr2_sysfs_trace("Destroying pvr2_sysfs_class id=%p",clp);
 682         kfree(clp);
 683 }
 684
 685
 686 static void pvr2_sysfs_release(struct class_device *class_dev)
 687 {
 688         pvr2_sysfs_trace("Releasing class_dev id=%p",class_dev);
 689         kfree(class_dev);
 690 }
 691
 692
 693 static void class_dev_destroy(struct pvr2_sysfs *sfp)
 694 {
 695         if (!sfp->class_dev) return;
 696 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 697         pvr2_sysfs_tear_down_debugifc(sfp);
 698 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 699         pvr2_sysfs_tear_down_controls(sfp);
 700         if (sfp->bus_info_created_ok) {
 701                 class_device_remove_file(sfp->class_dev,
 702                                          &sfp->attr_bus_info);
 703         }
 704         if (sfp->v4l_minor_number_created_ok) {
 705                 class_device_remove_file(sfp->class_dev,
 706                                          &sfp->attr_v4l_minor_number);
 707         }
 708         if (sfp->v4l_radio_minor_number_created_ok) {
 709                 class_device_remove_file(sfp->class_dev,
 710                                          &sfp->attr_v4l_radio_minor_number);
 711         }
 712         if (sfp->unit_number_created_ok) {
 713                 class_device_remove_file(sfp->class_dev,
 714                                          &sfp->attr_unit_number);
 715         }
 716         pvr2_sysfs_trace("Destroying class_dev id=%p",sfp->class_dev);
 717         sfp->class_dev->class_data = NULL;
 718         class_device_unregister(sfp->class_dev);
 719         sfp->class_dev = NULL;
 720 }
 721
 722
 723 static ssize_t v4l_minor_number_show(struct class_device *class_dev,char *buf)
 724 {
 725         struct pvr2_sysfs *sfp;
 726         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 727         if (!sfp) return -EINVAL;
 728         return scnprintf(buf,PAGE_SIZE,"%d\n",
 729                          pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
 730                                                        pvr2_v4l_type_video));
 731 }
 732
 733
 734 static ssize_t bus_info_show(struct class_device *class_dev,char *buf)
 735 {
 736         struct pvr2_sysfs *sfp;
 737         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 738         if (!sfp) return -EINVAL;
 739         return scnprintf(buf,PAGE_SIZE,"%s\n",
 740                          pvr2_hdw_get_bus_info(sfp->channel.hdw));
 741 }
 742
 743
 744 static ssize_t v4l_radio_minor_number_show(struct class_device *class_dev,
 745                                            char *buf)
 746 {
 747         struct pvr2_sysfs *sfp;
 748         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 749         if (!sfp) return -EINVAL;
 750         return scnprintf(buf,PAGE_SIZE,"%d\n",
 751                          pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
 752                                                        pvr2_v4l_type_radio));
 753 }
 754
 755
 756 static ssize_t unit_number_show(struct class_device *class_dev,char *buf)
 757 {
 758         struct pvr2_sysfs *sfp;
 759         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 760         if (!sfp) return -EINVAL;
 761         return scnprintf(buf,PAGE_SIZE,"%d\n",
 762                          pvr2_hdw_get_unit_number(sfp->channel.hdw));
 763 }
 764
 765
 766 static void class_dev_create(struct pvr2_sysfs *sfp,
 767                              struct pvr2_sysfs_class *class_ptr)
 768 {
 769         struct usb_device *usb_dev;
 770         struct class_device *class_dev;
 771         int ret;
 772
 773         usb_dev = pvr2_hdw_get_dev(sfp->channel.hdw);
 774         if (!usb_dev) return;
 775         class_dev = kzalloc(sizeof(*class_dev),GFP_KERNEL);
 776         if (!class_dev) return;
 777
 778         pvr2_sysfs_trace("Creating class_dev id=%p",class_dev);
 779
 780         class_dev->class = &class_ptr->class;
 781         if (pvr2_hdw_get_sn(sfp->channel.hdw)) {
 782                 snprintf(class_dev->class_id,BUS_ID_SIZE,"sn-%lu",
 783                          pvr2_hdw_get_sn(sfp->channel.hdw));
 784         } else if (pvr2_hdw_get_unit_number(sfp->channel.hdw) >= 0) {
 785                 snprintf(class_dev->class_id,BUS_ID_SIZE,"unit-%c",
 786                          pvr2_hdw_get_unit_number(sfp->channel.hdw) + 'a');
 787         } else {
 788                 kfree(class_dev);
 789                 return;
 790         }
 791
 792         class_dev->dev = &usb_dev->dev;
 793
 794         sfp->class_dev = class_dev;
 795         class_dev->class_data = sfp;
 796         ret = class_device_register(class_dev);
 797         if (ret) {
 798                 printk(KERN_ERR "%s: class_device_register failed\n",
 799                        __FUNCTION__);
 800                 kfree(class_dev);
 801                 return;
 802         }
 803
 804         sfp->attr_v4l_minor_number.attr.name = "v4l_minor_number";
 805         sfp->attr_v4l_minor_number.attr.mode = S_IRUGO;
 806         sfp->attr_v4l_minor_number.show = v4l_minor_number_show;
 807         sfp->attr_v4l_minor_number.store = NULL;
 808         ret = class_device_create_file(sfp->class_dev,
 809                                        &sfp->attr_v4l_minor_number);
 810         if (ret < 0) {
 811                 printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
 812                        __FUNCTION__, ret);
 813         } else {
 814                 sfp->v4l_minor_number_created_ok = !0;
 815         }
 816
 817         sfp->attr_v4l_radio_minor_number.attr.name = "v4l_radio_minor_number";
 818         sfp->attr_v4l_radio_minor_number.attr.mode = S_IRUGO;
 819         sfp->attr_v4l_radio_minor_number.show = v4l_radio_minor_number_show;
 820         sfp->attr_v4l_radio_minor_number.store = NULL;
 821         ret = class_device_create_file(sfp->class_dev,
 822                                        &sfp->attr_v4l_radio_minor_number);
 823         if (ret < 0) {
 824                 printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
 825                        __FUNCTION__, ret);
 826         } else {
 827                 sfp->v4l_radio_minor_number_created_ok = !0;
 828         }
 829
 830         sfp->attr_unit_number.attr.name = "unit_number";
 831         sfp->attr_unit_number.attr.mode = S_IRUGO;
 832         sfp->attr_unit_number.show = unit_number_show;
 833         sfp->attr_unit_number.store = NULL;
 834         ret = class_device_create_file(sfp->class_dev,&sfp->attr_unit_number);
 835         if (ret < 0) {
 836                 printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
 837                        __FUNCTION__, ret);
 838         } else {
 839                 sfp->unit_number_created_ok = !0;
 840         }
 841
 842         sfp->attr_bus_info.attr.name = "bus_info_str";
 843         sfp->attr_bus_info.attr.mode = S_IRUGO;
 844         sfp->attr_bus_info.show = bus_info_show;
 845         sfp->attr_bus_info.store = NULL;
 846         ret = class_device_create_file(sfp->class_dev,
 847                                        &sfp->attr_bus_info);
 848         if (ret < 0) {
 849                 printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
 850                        __FUNCTION__, ret);
 851         } else {
 852                 sfp->bus_info_created_ok = !0;
 853         }
 854
 855         pvr2_sysfs_add_controls(sfp);
 856 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 857         pvr2_sysfs_add_debugifc(sfp);
 858 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 859 }
 860
 861
 862 static void pvr2_sysfs_internal_check(struct pvr2_channel *chp)
 863 {
 864         struct pvr2_sysfs *sfp;
 865         sfp = container_of(chp,struct pvr2_sysfs,channel);
 866         if (!sfp->channel.mc_head->disconnect_flag) return;
 867         pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_sysfs id=%p",sfp);
 868         class_dev_destroy(sfp);
 869         pvr2_channel_done(&sfp->channel);
 870         kfree(sfp);
 871 }
 872
 873
 874 struct pvr2_sysfs *pvr2_sysfs_create(struct pvr2_context *mp,
 875                                      struct pvr2_sysfs_class *class_ptr)
 876 {
 877         struct pvr2_sysfs *sfp;
 878         sfp = kzalloc(sizeof(*sfp),GFP_KERNEL);
 879         if (!sfp) return sfp;
 880         pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_sysfs id=%p",sfp);
 881         pvr2_channel_init(&sfp->channel,mp);
 882         sfp->channel.check_func = pvr2_sysfs_internal_check;
 883
 884         class_dev_create(sfp,class_ptr);
 885         return sfp;
 886 }
 887
 888
 889 static int pvr2_sysfs_hotplug(struct class_device *cd,char **envp,
 890                               int numenvp,char *buf,int size)
 891 {
 892         /* Even though we don't do anything here, we still need this function
 893            because sysfs will still try to call it. */
 894         return 0;
 895 }
 896
 897 struct pvr2_sysfs_class *pvr2_sysfs_class_create(void)
 898 {
 899         struct pvr2_sysfs_class *clp;
 900         clp = kzalloc(sizeof(*clp),GFP_KERNEL);
 901         if (!clp) return clp;
 902         pvr2_sysfs_trace("Creating pvr2_sysfs_class id=%p",clp);
 903         clp->class.name = "pvrusb2";
 904         clp->class.class_release = pvr2_sysfs_class_release;
 905         clp->class.release = pvr2_sysfs_release;
 906         clp->class.uevent = pvr2_sysfs_hotplug;
 907         if (class_register(&clp->class)) {
 908                 pvr2_sysfs_trace(
 909                         "Registration failed for pvr2_sysfs_class id=%p",clp);
 910                 kfree(clp);
 911                 clp = NULL;
 912         }
 913         return clp;
 914 }
 915
 916
 917 void pvr2_sysfs_class_destroy(struct pvr2_sysfs_class *clp)
 918 {
 919         class_unregister(&clp->class);
 920 }
 921
 922
 923 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 924 static ssize_t debuginfo_show(struct class_device *class_dev,char *buf)
 925 {
 926         struct pvr2_sysfs *sfp;
 927         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 928         if (!sfp) return -EINVAL;
 929         pvr2_hdw_trigger_module_log(sfp->channel.hdw);
 930         return pvr2_debugifc_print_info(sfp->channel.hdw,buf,PAGE_SIZE);
 931 }
 932
 933
 934 static ssize_t debugcmd_show(struct class_device *class_dev,char *buf)
 935 {
 936         struct pvr2_sysfs *sfp;
 937         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 938         if (!sfp) return -EINVAL;
 939         return pvr2_debugifc_print_status(sfp->channel.hdw,buf,PAGE_SIZE);
 940 }
 941
 942
 943 static ssize_t debugcmd_store(struct class_device *class_dev,
 944                               const char *buf,size_t count)
 945 {
 946         struct pvr2_sysfs *sfp;
 947         int ret;
 948
 949         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 950         if (!sfp) return -EINVAL;
 951
 952         ret = pvr2_debugifc_docmd(sfp->channel.hdw,buf,count);
 953         if (ret < 0) return ret;
 954         return count;
 955 }
 956 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 957
 958
 959 /*
 960   Stuff for Emacs to see, in order to encourage consistent editing style:
 961   *** Local Variables: ***
 962   *** mode: c ***
 963   *** fill-column: 75 ***
 964   *** tab-width: 8 ***
 965   *** c-basic-offset: 8 ***
 966   *** End: ***
 967   */