SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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/config.h>
  23 #include <linux/string.h>
  24 #include <linux/slab.h>
  25 #include <asm/semaphore.h>
  26 #include "pvrusb2-sysfs.h"
  27 #include "pvrusb2-hdw.h"
  28 #include "pvrusb2-debug.h"
  29 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
  30 #include "pvrusb2-debugifc.h"
  31 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
  32
  33 #define pvr2_sysfs_trace(...) pvr2_trace(PVR2_TRACE_SYSFS,__VA_ARGS__)
  34
  35 struct pvr2_sysfs {
  36         struct pvr2_channel channel;
  37         struct class_device *class_dev;
  38 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
  39         struct pvr2_sysfs_debugifc *debugifc;
  40 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
  41         struct pvr2_sysfs_ctl_item *item_first;
  42         struct pvr2_sysfs_ctl_item *item_last;
  43         struct sysfs_ops kops;
  44         struct kobj_type ktype;
  45         struct class_device_attribute attr_v4l_minor_number;
  46         struct class_device_attribute attr_unit_number;
  47 };
  48
  49 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
  50 struct pvr2_sysfs_debugifc {
  51         struct class_device_attribute attr_debugcmd;
  52         struct class_device_attribute attr_debuginfo;
  53 };
  54 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
  55
  56 struct pvr2_sysfs_ctl_item {
  57         struct class_device_attribute attr_name;
  58         struct class_device_attribute attr_min;
  59         struct class_device_attribute attr_max;
  60         struct class_device_attribute attr_enum;
  61         struct class_device_attribute attr_bits;
  62         struct class_device_attribute attr_val;
  63         struct class_device_attribute attr_custom;
  64         struct pvr2_ctrl *cptr;
  65         struct pvr2_sysfs *chptr;
  66         struct pvr2_sysfs_ctl_item *item_next;
  67         struct attribute *attr_gen[6];
  68         struct attribute_group grp;
  69         char name[80];
  70 };
  71
  72 struct pvr2_sysfs_class {
  73         struct class class;
  74 };
  75
  76 static ssize_t show_name(int id,struct class_device *class_dev,char *buf)
  77 {
  78         struct pvr2_ctrl *cptr;
  79         struct pvr2_sysfs *sfp;
  80         const char *name;
  81
  82         sfp = (struct pvr2_sysfs *)class_dev->class_data;
  83         if (!sfp) return -EINVAL;
  84         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
  85         if (!cptr) return -EINVAL;
  86
  87         name = pvr2_ctrl_get_desc(cptr);
  88         pvr2_sysfs_trace("pvr2_sysfs(%p) show_name(cid=%d) is %s",sfp,id,name);
  89
  90         if (!name) return -EINVAL;
  91
  92         return scnprintf(buf,PAGE_SIZE,"%s\n",name);
  93 }
  94
  95 static ssize_t show_min(int id,struct class_device *class_dev,char *buf)
  96 {
  97         struct pvr2_ctrl *cptr;
  98         struct pvr2_sysfs *sfp;
  99         long val;
 100
 101         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 102         if (!sfp) return -EINVAL;
 103         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
 104         if (!cptr) return -EINVAL;
 105         val = pvr2_ctrl_get_min(cptr);
 106
 107         pvr2_sysfs_trace("pvr2_sysfs(%p) show_min(cid=%d) is %ld",sfp,id,val);
 108
 109         return scnprintf(buf,PAGE_SIZE,"%ld\n",val);
 110 }
 111
 112 static ssize_t show_max(int id,struct class_device *class_dev,char *buf)
 113 {
 114         struct pvr2_ctrl *cptr;
 115         struct pvr2_sysfs *sfp;
 116         long val;
 117
 118         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 119         if (!sfp) return -EINVAL;
 120         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
 121         if (!cptr) return -EINVAL;
 122         val = pvr2_ctrl_get_max(cptr);
 123
 124         pvr2_sysfs_trace("pvr2_sysfs(%p) show_max(cid=%d) is %ld",sfp,id,val);
 125
 126         return scnprintf(buf,PAGE_SIZE,"%ld\n",val);
 127 }
 128
 129 static ssize_t show_val_norm(int id,struct class_device *class_dev,char *buf)
 130 {
 131         struct pvr2_ctrl *cptr;
 132         struct pvr2_sysfs *sfp;
 133         int val,ret;
 134         unsigned int cnt = 0;
 135
 136         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 137         if (!sfp) return -EINVAL;
 138         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
 139         if (!cptr) return -EINVAL;
 140
 141         ret = pvr2_ctrl_get_value(cptr,&val);
 142         if (ret < 0) return ret;
 143
 144         ret = pvr2_ctrl_value_to_sym(cptr,~0,val,
 145                                      buf,PAGE_SIZE-1,&cnt);
 146
 147         pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_norm(cid=%d) is %.*s (%d)",
 148                          sfp,id,cnt,buf,val);
 149         buf[cnt] = '\n';
 150         return cnt+1;
 151 }
 152
 153 static ssize_t show_val_custom(int id,struct class_device *class_dev,char *buf)
 154 {
 155         struct pvr2_ctrl *cptr;
 156         struct pvr2_sysfs *sfp;
 157         int val,ret;
 158         unsigned int cnt = 0;
 159
 160         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 161         if (!sfp) return -EINVAL;
 162         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
 163         if (!cptr) return -EINVAL;
 164
 165         ret = pvr2_ctrl_get_value(cptr,&val);
 166         if (ret < 0) return ret;
 167
 168         ret = pvr2_ctrl_custom_value_to_sym(cptr,~0,val,
 169                                             buf,PAGE_SIZE-1,&cnt);
 170
 171         pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_custom(cid=%d) is %.*s (%d)",
 172                          sfp,id,cnt,buf,val);
 173         buf[cnt] = '\n';
 174         return cnt+1;
 175 }
 176
 177 static ssize_t show_enum(int id,struct class_device *class_dev,char *buf)
 178 {
 179         struct pvr2_ctrl *cptr;
 180         struct pvr2_sysfs *sfp;
 181         long val;
 182         unsigned int bcnt,ccnt,ecnt;
 183
 184         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 185         if (!sfp) return -EINVAL;
 186         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
 187         if (!cptr) return -EINVAL;
 188         ecnt = pvr2_ctrl_get_cnt(cptr);
 189         bcnt = 0;
 190         for (val = 0; val < ecnt; val++) {
 191                 pvr2_ctrl_get_valname(cptr,val,buf+bcnt,PAGE_SIZE-bcnt,&ccnt);
 192                 if (!ccnt) continue;
 193                 bcnt += ccnt;
 194                 if (bcnt >= PAGE_SIZE) break;
 195                 buf[bcnt] = '\n';
 196                 bcnt++;
 197         }
 198         pvr2_sysfs_trace("pvr2_sysfs(%p) show_enum(cid=%d)",sfp,id);
 199         return bcnt;
 200 }
 201
 202 static ssize_t show_bits(int id,struct class_device *class_dev,char *buf)
 203 {
 204         struct pvr2_ctrl *cptr;
 205         struct pvr2_sysfs *sfp;
 206         int valid_bits,msk;
 207         unsigned int bcnt,ccnt;
 208
 209         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 210         if (!sfp) return -EINVAL;
 211         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
 212         if (!cptr) return -EINVAL;
 213         valid_bits = pvr2_ctrl_get_mask(cptr);
 214         bcnt = 0;
 215         for (msk = 1; valid_bits; msk <<= 1) {
 216                 if (!(msk & valid_bits)) continue;
 217                 valid_bits &= ~msk;
 218                 pvr2_ctrl_get_valname(cptr,msk,buf+bcnt,PAGE_SIZE-bcnt,&ccnt);
 219                 bcnt += ccnt;
 220                 if (bcnt >= PAGE_SIZE) break;
 221                 buf[bcnt] = '\n';
 222                 bcnt++;
 223         }
 224         pvr2_sysfs_trace("pvr2_sysfs(%p) show_bits(cid=%d)",sfp,id);
 225         return bcnt;
 226 }
 227
 228 static int store_val_any(int id,int customfl,struct pvr2_sysfs *sfp,
 229                          const char *buf,unsigned int count)
 230 {
 231         struct pvr2_ctrl *cptr;
 232         int ret;
 233         int mask,val;
 234
 235         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
 236         if (customfl) {
 237                 ret = pvr2_ctrl_custom_sym_to_value(cptr,buf,count,&mask,&val);
 238         } else {
 239                 ret = pvr2_ctrl_sym_to_value(cptr,buf,count,&mask,&val);
 240         }
 241         if (ret < 0) return ret;
 242         ret = pvr2_ctrl_set_mask_value(cptr,mask,val);
 243         pvr2_hdw_commit_ctl(sfp->channel.hdw);
 244         return ret;
 245 }
 246
 247 static ssize_t store_val_norm(int id,struct class_device *class_dev,
 248                              const char *buf,size_t count)
 249 {
 250         struct pvr2_sysfs *sfp;
 251         int ret;
 252         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 253         ret = store_val_any(id,0,sfp,buf,count);
 254         if (!ret) ret = count;
 255         return ret;
 256 }
 257
 258 static ssize_t store_val_custom(int id,struct class_device *class_dev,
 259                                 const char *buf,size_t count)
 260 {
 261         struct pvr2_sysfs *sfp;
 262         int ret;
 263         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 264         ret = store_val_any(id,1,sfp,buf,count);
 265         if (!ret) ret = count;
 266         return ret;
 267 }
 268
 269 /*
 270   Mike Isely <isely@pobox.com> 30-April-2005
 271
 272   This next batch of horrible preprocessor hackery is needed because the
 273   kernel's class_device_attribute mechanism fails to pass the actual
 274   attribute through to the show / store functions, which means we have no
 275   way to package up any attribute-specific parameters, like for example the
 276   control id.  So we work around this brain-damage by encoding the control
 277   id into the show / store functions themselves and pick the function based
 278   on the control id we're setting up.  These macros try to ease the pain.
 279   Yuck.
 280 */
 281
 282 #define CREATE_SHOW_INSTANCE(sf_name,ctl_id) \
 283 static ssize_t sf_name##_##ctl_id(struct class_device *class_dev,char *buf) \
 284 { return sf_name(ctl_id,class_dev,buf); }
 285
 286 #define CREATE_STORE_INSTANCE(sf_name,ctl_id) \
 287 static ssize_t sf_name##_##ctl_id(struct class_device *class_dev,const char *buf,size_t count) \
 288 { return sf_name(ctl_id,class_dev,buf,count); }
 289
 290 #define CREATE_BATCH(ctl_id) \
 291 CREATE_SHOW_INSTANCE(show_name,ctl_id) \
 292 CREATE_SHOW_INSTANCE(show_min,ctl_id) \
 293 CREATE_SHOW_INSTANCE(show_max,ctl_id) \
 294 CREATE_SHOW_INSTANCE(show_val_norm,ctl_id) \
 295 CREATE_SHOW_INSTANCE(show_val_custom,ctl_id) \
 296 CREATE_SHOW_INSTANCE(show_enum,ctl_id) \
 297 CREATE_SHOW_INSTANCE(show_bits,ctl_id) \
 298 CREATE_STORE_INSTANCE(store_val_norm,ctl_id) \
 299 CREATE_STORE_INSTANCE(store_val_custom,ctl_id) \
 300
 301 CREATE_BATCH(0)
 302 CREATE_BATCH(1)
 303 CREATE_BATCH(2)
 304 CREATE_BATCH(3)
 305 CREATE_BATCH(4)
 306 CREATE_BATCH(5)
 307 CREATE_BATCH(6)
 308 CREATE_BATCH(7)
 309 CREATE_BATCH(8)
 310 CREATE_BATCH(9)
 311 CREATE_BATCH(10)
 312 CREATE_BATCH(11)
 313 CREATE_BATCH(12)
 314 CREATE_BATCH(13)
 315 CREATE_BATCH(14)
 316 CREATE_BATCH(15)
 317 CREATE_BATCH(16)
 318 CREATE_BATCH(17)
 319 CREATE_BATCH(18)
 320 CREATE_BATCH(19)
 321 CREATE_BATCH(20)
 322 CREATE_BATCH(21)
 323 CREATE_BATCH(22)
 324 CREATE_BATCH(23)
 325 CREATE_BATCH(24)
 326 CREATE_BATCH(25)
 327 CREATE_BATCH(26)
 328 CREATE_BATCH(27)
 329 CREATE_BATCH(28)
 330 CREATE_BATCH(29)
 331 CREATE_BATCH(30)
 332 CREATE_BATCH(31)
 333 CREATE_BATCH(32)
 334 CREATE_BATCH(33)
 335
 336 struct pvr2_sysfs_func_set {
 337         ssize_t (*show_name)(struct class_device *,char *);
 338         ssize_t (*show_min)(struct class_device *,char *);
 339         ssize_t (*show_max)(struct class_device *,char *);
 340         ssize_t (*show_enum)(struct class_device *,char *);
 341         ssize_t (*show_bits)(struct class_device *,char *);
 342         ssize_t (*show_val_norm)(struct class_device *,char *);
 343         ssize_t (*store_val_norm)(struct class_device *,
 344                                   const char *,size_t);
 345         ssize_t (*show_val_custom)(struct class_device *,char *);
 346         ssize_t (*store_val_custom)(struct class_device *,
 347                                     const char *,size_t);
 348 };
 349
 350 #define INIT_BATCH(ctl_id) \
 351 [ctl_id] = { \
 352     .show_name = show_name_##ctl_id, \
 353     .show_min = show_min_##ctl_id, \
 354     .show_max = show_max_##ctl_id, \
 355     .show_enum = show_enum_##ctl_id, \
 356     .show_bits = show_bits_##ctl_id, \
 357     .show_val_norm = show_val_norm_##ctl_id, \
 358     .store_val_norm = store_val_norm_##ctl_id, \
 359     .show_val_custom = show_val_custom_##ctl_id, \
 360     .store_val_custom = store_val_custom_##ctl_id, \
 361 } \
 362
 363 static struct pvr2_sysfs_func_set funcs[] = {
 364         INIT_BATCH(0),
 365         INIT_BATCH(1),
 366         INIT_BATCH(2),
 367         INIT_BATCH(3),
 368         INIT_BATCH(4),
 369         INIT_BATCH(5),
 370         INIT_BATCH(6),
 371         INIT_BATCH(7),
 372         INIT_BATCH(8),
 373         INIT_BATCH(9),
 374         INIT_BATCH(10),
 375         INIT_BATCH(11),
 376         INIT_BATCH(12),
 377         INIT_BATCH(13),
 378         INIT_BATCH(14),
 379         INIT_BATCH(15),
 380         INIT_BATCH(16),
 381         INIT_BATCH(17),
 382         INIT_BATCH(18),
 383         INIT_BATCH(19),
 384         INIT_BATCH(20),
 385         INIT_BATCH(21),
 386         INIT_BATCH(22),
 387         INIT_BATCH(23),
 388         INIT_BATCH(24),
 389         INIT_BATCH(25),
 390         INIT_BATCH(26),
 391         INIT_BATCH(27),
 392         INIT_BATCH(28),
 393         INIT_BATCH(29),
 394         INIT_BATCH(30),
 395         INIT_BATCH(31),
 396         INIT_BATCH(32),
 397         INIT_BATCH(33),
 398 };
 399
 400
 401 static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id)
 402 {
 403         struct pvr2_sysfs_ctl_item *cip;
 404         struct pvr2_sysfs_func_set *fp;
 405         struct pvr2_ctrl *cptr;
 406         unsigned int cnt,acnt;
 407
 408         if ((ctl_id < 0) || (ctl_id >= (sizeof(funcs)/sizeof(funcs[0])))) {
 409                 return;
 410         }
 411
 412         fp = funcs + ctl_id;
 413         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,ctl_id);
 414         if (!cptr) return;
 415
 416         cip = kmalloc(sizeof(*cip),GFP_KERNEL);
 417         if (!cip) return;
 418         memset(cip,0,sizeof(*cip));
 419         pvr2_sysfs_trace("Creating pvr2_sysfs_ctl_item id=%p",cip);
 420
 421         cip->cptr = cptr;
 422
 423         cip->chptr = sfp;
 424         cip->item_next = 0;
 425         if (sfp->item_last) {
 426                 sfp->item_last->item_next = cip;
 427         } else {
 428                 sfp->item_first = cip;
 429         }
 430         sfp->item_last = cip;
 431
 432         cip->attr_name.attr.owner = THIS_MODULE;
 433         cip->attr_name.attr.name = "name";
 434         cip->attr_name.attr.mode = S_IRUGO;
 435         cip->attr_name.show = fp->show_name;
 436
 437         cip->attr_min.attr.owner = THIS_MODULE;
 438         cip->attr_min.attr.name = "min_val";
 439         cip->attr_min.attr.mode = S_IRUGO;
 440         cip->attr_min.show = fp->show_min;
 441
 442         cip->attr_max.attr.owner = THIS_MODULE;
 443         cip->attr_max.attr.name = "max_val";
 444         cip->attr_max.attr.mode = S_IRUGO;
 445         cip->attr_max.show = fp->show_max;
 446
 447         cip->attr_val.attr.owner = THIS_MODULE;
 448         cip->attr_val.attr.name = "cur_val";
 449         cip->attr_val.attr.mode = S_IRUGO;
 450
 451         cip->attr_custom.attr.owner = THIS_MODULE;
 452         cip->attr_custom.attr.name = "custom_val";
 453         cip->attr_custom.attr.mode = S_IRUGO;
 454
 455         cip->attr_enum.attr.owner = THIS_MODULE;
 456         cip->attr_enum.attr.name = "enum_val";
 457         cip->attr_enum.attr.mode = S_IRUGO;
 458         cip->attr_enum.show = fp->show_enum;
 459
 460         cip->attr_bits.attr.owner = THIS_MODULE;
 461         cip->attr_bits.attr.name = "bit_val";
 462         cip->attr_bits.attr.mode = S_IRUGO;
 463         cip->attr_bits.show = fp->show_bits;
 464
 465         if (pvr2_ctrl_is_writable(cptr)) {
 466                 cip->attr_val.attr.mode |= S_IWUSR|S_IWGRP;
 467                 cip->attr_custom.attr.mode |= S_IWUSR|S_IWGRP;
 468         }
 469
 470         acnt = 0;
 471         cip->attr_gen[acnt++] = &cip->attr_name.attr;
 472         cip->attr_gen[acnt++] = &cip->attr_val.attr;
 473         cip->attr_val.show = fp->show_val_norm;
 474         cip->attr_val.store = fp->store_val_norm;
 475         if (pvr2_ctrl_has_custom_symbols(cptr)) {
 476                 cip->attr_gen[acnt++] = &cip->attr_custom.attr;
 477                 cip->attr_custom.show = fp->show_val_custom;
 478                 cip->attr_custom.store = fp->store_val_custom;
 479         }
 480         switch (pvr2_ctrl_get_type(cptr)) {
 481         case pvr2_ctl_enum:
 482                 // Control is an enumeration
 483                 cip->attr_gen[acnt++] = &cip->attr_enum.attr;
 484                 break;
 485         case pvr2_ctl_int:
 486                 // Control is an integer
 487                 cip->attr_gen[acnt++] = &cip->attr_min.attr;
 488                 cip->attr_gen[acnt++] = &cip->attr_max.attr;
 489                 break;
 490         case pvr2_ctl_bitmask:
 491                 // Control is an bitmask
 492                 cip->attr_gen[acnt++] = &cip->attr_bits.attr;
 493                 break;
 494         default: break;
 495         }
 496
 497         cnt = scnprintf(cip->name,sizeof(cip->name)-1,"ctl_%s",
 498                         pvr2_ctrl_get_name(cptr));
 499         cip->name[cnt] = 0;
 500         cip->grp.name = cip->name;
 501         cip->grp.attrs = cip->attr_gen;
 502
 503         sysfs_create_group(&sfp->class_dev->kobj,&cip->grp);
 504 }
 505
 506 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 507 static ssize_t debuginfo_show(struct class_device *,char *);
 508 static ssize_t debugcmd_show(struct class_device *,char *);
 509 static ssize_t debugcmd_store(struct class_device *,const char *,size_t count);
 510
 511 static void pvr2_sysfs_add_debugifc(struct pvr2_sysfs *sfp)
 512 {
 513         struct pvr2_sysfs_debugifc *dip;
 514         dip = kmalloc(sizeof(*dip),GFP_KERNEL);
 515         if (!dip) return;
 516         memset(dip,0,sizeof(*dip));
 517         dip->attr_debugcmd.attr.owner = THIS_MODULE;
 518         dip->attr_debugcmd.attr.name = "debugcmd";
 519         dip->attr_debugcmd.attr.mode = S_IRUGO|S_IWUSR|S_IWGRP;
 520         dip->attr_debugcmd.show = debugcmd_show;
 521         dip->attr_debugcmd.store = debugcmd_store;
 522         dip->attr_debuginfo.attr.owner = THIS_MODULE;
 523         dip->attr_debuginfo.attr.name = "debuginfo";
 524         dip->attr_debuginfo.attr.mode = S_IRUGO;
 525         dip->attr_debuginfo.show = debuginfo_show;
 526         sfp->debugifc = dip;
 527         class_device_create_file(sfp->class_dev,&dip->attr_debugcmd);
 528         class_device_create_file(sfp->class_dev,&dip->attr_debuginfo);
 529 }
 530
 531
 532 static void pvr2_sysfs_tear_down_debugifc(struct pvr2_sysfs *sfp)
 533 {
 534         if (!sfp->debugifc) return;
 535         class_device_remove_file(sfp->class_dev,
 536                                  &sfp->debugifc->attr_debuginfo);
 537         class_device_remove_file(sfp->class_dev,&sfp->debugifc->attr_debugcmd);
 538         kfree(sfp->debugifc);
 539         sfp->debugifc = 0;
 540 }
 541 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 542
 543
 544 static void pvr2_sysfs_add_controls(struct pvr2_sysfs *sfp)
 545 {
 546         unsigned int idx,cnt;
 547         cnt = pvr2_hdw_get_ctrl_count(sfp->channel.hdw);
 548         for (idx = 0; idx < cnt; idx++) {
 549                 pvr2_sysfs_add_control(sfp,idx);
 550         }
 551 }
 552
 553
 554 static void pvr2_sysfs_tear_down_controls(struct pvr2_sysfs *sfp)
 555 {
 556         struct pvr2_sysfs_ctl_item *cip1,*cip2;
 557         for (cip1 = sfp->item_first; cip1; cip1 = cip2) {
 558                 cip2 = cip1->item_next;
 559                 sysfs_remove_group(&sfp->class_dev->kobj,&cip1->grp);
 560                 pvr2_sysfs_trace("Destroying pvr2_sysfs_ctl_item id=%p",cip1);
 561                 kfree(cip1);
 562         }
 563 }
 564
 565
 566 static void pvr2_sysfs_class_release(struct class *class)
 567 {
 568         struct pvr2_sysfs_class *clp;
 569         clp = container_of(class,struct pvr2_sysfs_class,class);
 570         pvr2_sysfs_trace("Destroying pvr2_sysfs_class id=%p",clp);
 571         kfree(clp);
 572 }
 573
 574
 575 static void pvr2_sysfs_release(struct class_device *class_dev)
 576 {
 577         pvr2_sysfs_trace("Releasing class_dev id=%p",class_dev);
 578         kfree(class_dev);
 579 }
 580
 581
 582 static void class_dev_destroy(struct pvr2_sysfs *sfp)
 583 {
 584         if (!sfp->class_dev) return;
 585 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 586         pvr2_sysfs_tear_down_debugifc(sfp);
 587 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 588         pvr2_sysfs_tear_down_controls(sfp);
 589         class_device_remove_file(sfp->class_dev,&sfp->attr_v4l_minor_number);
 590         class_device_remove_file(sfp->class_dev,&sfp->attr_unit_number);
 591         pvr2_sysfs_trace("Destroying class_dev id=%p",sfp->class_dev);
 592         sfp->class_dev->class_data = 0;
 593         class_device_unregister(sfp->class_dev);
 594         sfp->class_dev = 0;
 595 }
 596
 597
 598 static ssize_t v4l_minor_number_show(struct class_device *class_dev,char *buf)
 599 {
 600         struct pvr2_sysfs *sfp;
 601         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 602         if (!sfp) return -EINVAL;
 603         return scnprintf(buf,PAGE_SIZE,"%d\n",
 604                          pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw));
 605 }
 606
 607
 608 static ssize_t unit_number_show(struct class_device *class_dev,char *buf)
 609 {
 610         struct pvr2_sysfs *sfp;
 611         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 612         if (!sfp) return -EINVAL;
 613         return scnprintf(buf,PAGE_SIZE,"%d\n",
 614                          pvr2_hdw_get_unit_number(sfp->channel.hdw));
 615 }
 616
 617
 618 static void class_dev_create(struct pvr2_sysfs *sfp,
 619                              struct pvr2_sysfs_class *class_ptr)
 620 {
 621         struct usb_device *usb_dev;
 622         struct class_device *class_dev;
 623         usb_dev = pvr2_hdw_get_dev(sfp->channel.hdw);
 624         if (!usb_dev) return;
 625         class_dev = kmalloc(sizeof(*class_dev),GFP_KERNEL);
 626         if (!class_dev) return;
 627         memset(class_dev,0,sizeof(*class_dev));
 628
 629         pvr2_sysfs_trace("Creating class_dev id=%p",class_dev);
 630
 631         class_dev->class = &class_ptr->class;
 632         if (pvr2_hdw_get_sn(sfp->channel.hdw)) {
 633                 snprintf(class_dev->class_id,BUS_ID_SIZE,"sn-%lu",
 634                          pvr2_hdw_get_sn(sfp->channel.hdw));
 635         } else if (pvr2_hdw_get_unit_number(sfp->channel.hdw) >= 0) {
 636                 snprintf(class_dev->class_id,BUS_ID_SIZE,"unit-%c",
 637                          pvr2_hdw_get_unit_number(sfp->channel.hdw) + 'a');
 638         } else {
 639                 kfree(class_dev);
 640                 return;
 641         }
 642
 643         class_dev->dev = &usb_dev->dev;
 644
 645         sfp->class_dev = class_dev;
 646         class_dev->class_data = sfp;
 647         class_device_register(class_dev);
 648
 649         sfp->attr_v4l_minor_number.attr.owner = THIS_MODULE;
 650         sfp->attr_v4l_minor_number.attr.name = "v4l_minor_number";
 651         sfp->attr_v4l_minor_number.attr.mode = S_IRUGO;
 652         sfp->attr_v4l_minor_number.show = v4l_minor_number_show;
 653         sfp->attr_v4l_minor_number.store = 0;
 654         class_device_create_file(sfp->class_dev,&sfp->attr_v4l_minor_number);
 655         sfp->attr_unit_number.attr.owner = THIS_MODULE;
 656         sfp->attr_unit_number.attr.name = "unit_number";
 657         sfp->attr_unit_number.attr.mode = S_IRUGO;
 658         sfp->attr_unit_number.show = unit_number_show;
 659         sfp->attr_unit_number.store = 0;
 660         class_device_create_file(sfp->class_dev,&sfp->attr_unit_number);
 661
 662         pvr2_sysfs_add_controls(sfp);
 663 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 664         pvr2_sysfs_add_debugifc(sfp);
 665 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 666 }
 667
 668
 669 static void pvr2_sysfs_internal_check(struct pvr2_channel *chp)
 670 {
 671         struct pvr2_sysfs *sfp;
 672         sfp = container_of(chp,struct pvr2_sysfs,channel);
 673         if (!sfp->channel.mc_head->disconnect_flag) return;
 674         pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_sysfs id=%p",sfp);
 675         class_dev_destroy(sfp);
 676         pvr2_channel_done(&sfp->channel);
 677         kfree(sfp);
 678 }
 679
 680
 681 struct pvr2_sysfs *pvr2_sysfs_create(struct pvr2_context *mp,
 682                                      struct pvr2_sysfs_class *class_ptr)
 683 {
 684         struct pvr2_sysfs *sfp;
 685         sfp = kmalloc(sizeof(*sfp),GFP_KERNEL);
 686         if (!sfp) return sfp;
 687         memset(sfp,0,sizeof(*sfp));
 688         pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_sysfs id=%p",sfp);
 689         pvr2_channel_init(&sfp->channel,mp);
 690         sfp->channel.check_func = pvr2_sysfs_internal_check;
 691
 692         class_dev_create(sfp,class_ptr);
 693         return sfp;
 694 }
 695
 696
 697 static int pvr2_sysfs_hotplug(struct class_device *cd,char **envp,
 698                               int numenvp,char *buf,int size)
 699 {
 700         /* Even though we don't do anything here, we still need this function
 701            because sysfs will still try to call it. */
 702         return 0;
 703 }
 704
 705 struct pvr2_sysfs_class *pvr2_sysfs_class_create(void)
 706 {
 707         struct pvr2_sysfs_class *clp;
 708         clp = kmalloc(sizeof(*clp),GFP_KERNEL);
 709         if (!clp) return clp;
 710         memset(clp,0,sizeof(*clp));
 711         pvr2_sysfs_trace("Creating pvr2_sysfs_class id=%p",clp);
 712         clp->class.name = "pvrusb2";
 713         clp->class.class_release = pvr2_sysfs_class_release;
 714         clp->class.release = pvr2_sysfs_release;
 715         clp->class.uevent = pvr2_sysfs_hotplug;
 716         if (class_register(&clp->class)) {
 717                 pvr2_sysfs_trace(
 718                         "Registration failed for pvr2_sysfs_class id=%p",clp);
 719                 kfree(clp);
 720                 clp = 0;
 721         }
 722         return clp;
 723 }
 724
 725
 726 void pvr2_sysfs_class_destroy(struct pvr2_sysfs_class *clp)
 727 {
 728         class_unregister(&clp->class);
 729 }
 730
 731
 732 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 733 static ssize_t debuginfo_show(struct class_device *class_dev,char *buf)
 734 {
 735         struct pvr2_sysfs *sfp;
 736         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 737         if (!sfp) return -EINVAL;
 738         pvr2_hdw_trigger_module_log(sfp->channel.hdw);
 739         return pvr2_debugifc_print_info(sfp->channel.hdw,buf,PAGE_SIZE);
 740 }
 741
 742
 743 static ssize_t debugcmd_show(struct class_device *class_dev,char *buf)
 744 {
 745         struct pvr2_sysfs *sfp;
 746         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 747         if (!sfp) return -EINVAL;
 748         return pvr2_debugifc_print_status(sfp->channel.hdw,buf,PAGE_SIZE);
 749 }
 750
 751
 752 static ssize_t debugcmd_store(struct class_device *class_dev,
 753                               const char *buf,size_t count)
 754 {
 755         struct pvr2_sysfs *sfp;
 756         int ret;
 757
 758         sfp = (struct pvr2_sysfs *)class_dev->class_data;
 759         if (!sfp) return -EINVAL;
 760
 761         ret = pvr2_debugifc_docmd(sfp->channel.hdw,buf,count);
 762         if (ret < 0) return ret;
 763         return count;
 764 }
 765 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 766
 767
 768 /*
 769   Stuff for Emacs to see, in order to encourage consistent editing style:
 770   *** Local Variables: ***
 771   *** mode: c ***
 772   *** fill-column: 75 ***
 773   *** tab-width: 8 ***
 774   *** c-basic-offset: 8 ***
 775   *** End: ***
 776   */