drivers/media/video/pvrusb2/pvrusb2-sysfs.c

   1 /*
   2  *
   3  *
   4  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include <linux/string.h>
  22 #include <linux/slab.h>
  23 #include "pvrusb2-sysfs.h"
  24 #include "pvrusb2-hdw.h"
  25 #include "pvrusb2-debug.h"
  26 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
  27 #include "pvrusb2-debugifc.h"
  28 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
  29
  30 #define pvr2_sysfs_trace(...) pvr2_trace(PVR2_TRACE_SYSFS,__VA_ARGS__)
  31
  32 struct pvr2_sysfs {
  33         struct pvr2_channel channel;
  34         struct device *class_dev;
  35 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
  36         struct pvr2_sysfs_debugifc *debugifc;
  37 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
  38         struct pvr2_sysfs_ctl_item *item_first;
  39         struct pvr2_sysfs_ctl_item *item_last;
  40         struct device_attribute attr_v4l_minor_number;
  41         struct device_attribute attr_v4l_radio_minor_number;
  42         struct device_attribute attr_unit_number;
  43         struct device_attribute attr_bus_info;
  44         struct device_attribute attr_hdw_name;
  45         struct device_attribute attr_hdw_desc;
  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         int hdw_name_created_ok;
  51         int hdw_desc_created_ok;
  52 };
  53
  54 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
  55 struct pvr2_sysfs_debugifc {
  56         struct device_attribute attr_debugcmd;
  57         struct device_attribute attr_debuginfo;
  58         int debugcmd_created_ok;
  59         int debuginfo_created_ok;
  60 };
  61 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
  62
  63 struct pvr2_sysfs_ctl_item {
  64         struct device_attribute attr_name;
  65         struct device_attribute attr_type;
  66         struct device_attribute attr_min;
  67         struct device_attribute attr_max;
  68         struct device_attribute attr_def;
  69         struct device_attribute attr_enum;
  70         struct device_attribute attr_bits;
  71         struct device_attribute attr_val;
  72         struct device_attribute attr_custom;
  73         struct pvr2_ctrl *cptr;
  74         int ctl_id;
  75         struct pvr2_sysfs *chptr;
  76         struct pvr2_sysfs_ctl_item *item_next;
  77         struct attribute *attr_gen[8];
  78         struct attribute_group grp;
  79         int created_ok;
  80         char name[80];
  81 };
  82
  83 struct pvr2_sysfs_class {
  84         struct class class;
  85 };
  86
  87 static ssize_t show_name(struct device *class_dev,
  88                          struct device_attribute *attr,
  89                          char *buf)
  90 {
  91         struct pvr2_sysfs_ctl_item *cip;
  92         const char *name;
  93         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_name);
  94         name = pvr2_ctrl_get_desc(cip->cptr);
  95         pvr2_sysfs_trace("pvr2_sysfs(%p) show_name(cid=%d) is %s",
  96                          cip->chptr, cip->ctl_id, name);
  97         if (!name) return -EINVAL;
  98         return scnprintf(buf, PAGE_SIZE, "%s\n", name);
  99 }
 100
 101 static ssize_t show_type(struct device *class_dev,
 102                          struct device_attribute *attr,
 103                          char *buf)
 104 {
 105         struct pvr2_sysfs_ctl_item *cip;
 106         const char *name;
 107         enum pvr2_ctl_type tp;
 108         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_type);
 109         tp = pvr2_ctrl_get_type(cip->cptr);
 110         switch (tp) {
 111         case pvr2_ctl_int: name = "integer"; break;
 112         case pvr2_ctl_enum: name = "enum"; break;
 113         case pvr2_ctl_bitmask: name = "bitmask"; break;
 114         case pvr2_ctl_bool: name = "boolean"; break;
 115         default: name = "?"; break;
 116         }
 117         pvr2_sysfs_trace("pvr2_sysfs(%p) show_type(cid=%d) is %s",
 118                          cip->chptr, cip->ctl_id, name);
 119         if (!name) return -EINVAL;
 120         return scnprintf(buf, PAGE_SIZE, "%s\n", name);
 121 }
 122
 123 static ssize_t show_min(struct device *class_dev,
 124                         struct device_attribute *attr,
 125                         char *buf)
 126 {
 127         struct pvr2_sysfs_ctl_item *cip;
 128         long val;
 129         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_min);
 130         val = pvr2_ctrl_get_min(cip->cptr);
 131         pvr2_sysfs_trace("pvr2_sysfs(%p) show_min(cid=%d) is %ld",
 132                          cip->chptr, cip->ctl_id, val);
 133         return scnprintf(buf, PAGE_SIZE, "%ld\n", val);
 134 }
 135
 136 static ssize_t show_max(struct device *class_dev,
 137                         struct device_attribute *attr,
 138                         char *buf)
 139 {
 140         struct pvr2_sysfs_ctl_item *cip;
 141         long val;
 142         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_max);
 143         val = pvr2_ctrl_get_max(cip->cptr);
 144         pvr2_sysfs_trace("pvr2_sysfs(%p) show_max(cid=%d) is %ld",
 145                          cip->chptr, cip->ctl_id, val);
 146         return scnprintf(buf, PAGE_SIZE, "%ld\n", val);
 147 }
 148
 149 static ssize_t show_def(struct device *class_dev,
 150                         struct device_attribute *attr,
 151                         char *buf)
 152 {
 153         struct pvr2_sysfs_ctl_item *cip;
 154         int val;
 155         int ret;
 156         unsigned int cnt = 0;
 157         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_def);
 158         ret = pvr2_ctrl_get_def(cip->cptr, &val);
 159         if (ret < 0) return ret;
 160         ret = pvr2_ctrl_value_to_sym(cip->cptr, ~0, val,
 161                                      buf, PAGE_SIZE - 1, &cnt);
 162         pvr2_sysfs_trace("pvr2_sysfs(%p) show_def(cid=%d) is %.*s (%d)",
 163                          cip->chptr, cip->ctl_id, cnt, buf, val);
 164         buf[cnt] = '\n';
 165         return cnt + 1;
 166 }
 167
 168 static ssize_t show_val_norm(struct device *class_dev,
 169                              struct device_attribute *attr,
 170                              char *buf)
 171 {
 172         struct pvr2_sysfs_ctl_item *cip;
 173         int val;
 174         int ret;
 175         unsigned int cnt = 0;
 176         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_val);
 177         ret = pvr2_ctrl_get_value(cip->cptr, &val);
 178         if (ret < 0) return ret;
 179         ret = pvr2_ctrl_value_to_sym(cip->cptr, ~0, val,
 180                                      buf, PAGE_SIZE - 1, &cnt);
 181         pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_norm(cid=%d) is %.*s (%d)",
 182                          cip->chptr, cip->ctl_id, cnt, buf, val);
 183         buf[cnt] = '\n';
 184         return cnt+1;
 185 }
 186
 187 static ssize_t show_val_custom(struct device *class_dev,
 188                                struct device_attribute *attr,
 189                                char *buf)
 190 {
 191         struct pvr2_sysfs_ctl_item *cip;
 192         int val;
 193         int ret;
 194         unsigned int cnt = 0;
 195         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_custom);
 196         ret = pvr2_ctrl_get_value(cip->cptr, &val);
 197         if (ret < 0) return ret;
 198         ret = pvr2_ctrl_custom_value_to_sym(cip->cptr, ~0, val,
 199                                             buf, PAGE_SIZE - 1, &cnt);
 200         pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_custom(cid=%d) is %.*s (%d)",
 201                          cip->chptr, cip->ctl_id, cnt, buf, val);
 202         buf[cnt] = '\n';
 203         return cnt+1;
 204 }
 205
 206 static ssize_t show_enum(struct device *class_dev,
 207                          struct device_attribute *attr,
 208                          char *buf)
 209 {
 210         struct pvr2_sysfs_ctl_item *cip;
 211         long val;
 212         unsigned int bcnt, ccnt, ecnt;
 213         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_enum);
 214         ecnt = pvr2_ctrl_get_cnt(cip->cptr);
 215         bcnt = 0;
 216         for (val = 0; val < ecnt; val++) {
 217                 pvr2_ctrl_get_valname(cip->cptr, val, buf + bcnt,
 218                                       PAGE_SIZE - bcnt, &ccnt);
 219                 if (!ccnt) continue;
 220                 bcnt += ccnt;
 221                 if (bcnt >= PAGE_SIZE) break;
 222                 buf[bcnt] = '\n';
 223                 bcnt++;
 224         }
 225         pvr2_sysfs_trace("pvr2_sysfs(%p) show_enum(cid=%d)",
 226                          cip->chptr, cip->ctl_id);
 227         return bcnt;
 228 }
 229
 230 static ssize_t show_bits(struct device *class_dev,
 231                          struct device_attribute *attr,
 232                          char *buf)
 233 {
 234         struct pvr2_sysfs_ctl_item *cip;
 235         int valid_bits, msk;
 236         unsigned int bcnt, ccnt;
 237         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_bits);
 238         valid_bits = pvr2_ctrl_get_mask(cip->cptr);
 239         bcnt = 0;
 240         for (msk = 1; valid_bits; msk <<= 1) {
 241                 if (!(msk & valid_bits)) continue;
 242                 valid_bits &= ~msk;
 243                 pvr2_ctrl_get_valname(cip->cptr, msk, buf + bcnt,
 244                                       PAGE_SIZE - bcnt, &ccnt);
 245                 bcnt += ccnt;
 246                 if (bcnt >= PAGE_SIZE) break;
 247                 buf[bcnt] = '\n';
 248                 bcnt++;
 249         }
 250         pvr2_sysfs_trace("pvr2_sysfs(%p) show_bits(cid=%d)",
 251                          cip->chptr, cip->ctl_id);
 252         return bcnt;
 253 }
 254
 255 static int store_val_any(struct pvr2_sysfs_ctl_item *cip, int customfl,
 256                          const char *buf,unsigned int count)
 257 {
 258         int ret;
 259         int mask,val;
 260         if (customfl) {
 261                 ret = pvr2_ctrl_custom_sym_to_value(cip->cptr, buf, count,
 262                                                     &mask, &val);
 263         } else {
 264                 ret = pvr2_ctrl_sym_to_value(cip->cptr, buf, count,
 265                                              &mask, &val);
 266         }
 267         if (ret < 0) return ret;
 268         ret = pvr2_ctrl_set_mask_value(cip->cptr, mask, val);
 269         pvr2_hdw_commit_ctl(cip->chptr->channel.hdw);
 270         return ret;
 271 }
 272
 273 static ssize_t store_val_norm(struct device *class_dev,
 274                               struct device_attribute *attr,
 275                               const char *buf, size_t count)
 276 {
 277         struct pvr2_sysfs_ctl_item *cip;
 278         int ret;
 279         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_val);
 280         pvr2_sysfs_trace("pvr2_sysfs(%p) store_val_norm(cid=%d) \"%.*s\"",
 281                          cip->chptr, cip->ctl_id, (int)count, buf);
 282         ret = store_val_any(cip, 0, buf, count);
 283         if (!ret) ret = count;
 284         return ret;
 285 }
 286
 287 static ssize_t store_val_custom(struct device *class_dev,
 288                                 struct device_attribute *attr,
 289                                 const char *buf, size_t count)
 290 {
 291         struct pvr2_sysfs_ctl_item *cip;
 292         int ret;
 293         cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_custom);
 294         pvr2_sysfs_trace("pvr2_sysfs(%p) store_val_custom(cid=%d) \"%.*s\"",
 295                          cip->chptr, cip->ctl_id, (int)count, buf);
 296         ret = store_val_any(cip, 1, buf, count);
 297         if (!ret) ret = count;
 298         return ret;
 299 }
 300
 301 static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id)
 302 {
 303         struct pvr2_sysfs_ctl_item *cip;
 304         struct pvr2_ctrl *cptr;
 305         unsigned int cnt,acnt;
 306         int ret;
 307
 308         cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,ctl_id);
 309         if (!cptr) return;
 310
 311         cip = kzalloc(sizeof(*cip),GFP_KERNEL);
 312         if (!cip) return;
 313         pvr2_sysfs_trace("Creating pvr2_sysfs_ctl_item id=%p",cip);
 314
 315         cip->cptr = cptr;
 316         cip->ctl_id = ctl_id;
 317
 318         cip->chptr = sfp;
 319         cip->item_next = NULL;
 320         if (sfp->item_last) {
 321                 sfp->item_last->item_next = cip;
 322         } else {
 323                 sfp->item_first = cip;
 324         }
 325         sfp->item_last = cip;
 326
 327         sysfs_attr_init(&cip->attr_name.attr);
 328         cip->attr_name.attr.name = "name";
 329         cip->attr_name.attr.mode = S_IRUGO;
 330         cip->attr_name.show = show_name;
 331
 332         sysfs_attr_init(&cip->attr_type.attr);
 333         cip->attr_type.attr.name = "type";
 334         cip->attr_type.attr.mode = S_IRUGO;
 335         cip->attr_type.show = show_type;
 336
 337         sysfs_attr_init(&cip->attr_min.attr);
 338         cip->attr_min.attr.name = "min_val";
 339         cip->attr_min.attr.mode = S_IRUGO;
 340         cip->attr_min.show = show_min;
 341
 342         sysfs_attr_init(&cip->attr_max.attr);
 343         cip->attr_max.attr.name = "max_val";
 344         cip->attr_max.attr.mode = S_IRUGO;
 345         cip->attr_max.show = show_max;
 346
 347         sysfs_attr_init(&cip->attr_def.attr);
 348         cip->attr_def.attr.name = "def_val";
 349         cip->attr_def.attr.mode = S_IRUGO;
 350         cip->attr_def.show = show_def;
 351
 352         sysfs_attr_init(&cip->attr_val.attr);
 353         cip->attr_val.attr.name = "cur_val";
 354         cip->attr_val.attr.mode = S_IRUGO;
 355
 356         sysfs_attr_init(&cip->attr_custom.attr);
 357         cip->attr_custom.attr.name = "custom_val";
 358         cip->attr_custom.attr.mode = S_IRUGO;
 359
 360         sysfs_attr_init(&cip->attr_enum.attr);
 361         cip->attr_enum.attr.name = "enum_val";
 362         cip->attr_enum.attr.mode = S_IRUGO;
 363         cip->attr_enum.show = show_enum;
 364
 365         sysfs_attr_init(&cip->attr_bits.attr);
 366         cip->attr_bits.attr.name = "bit_val";
 367         cip->attr_bits.attr.mode = S_IRUGO;
 368         cip->attr_bits.show = show_bits;
 369
 370         if (pvr2_ctrl_is_writable(cptr)) {
 371                 cip->attr_val.attr.mode |= S_IWUSR|S_IWGRP;
 372                 cip->attr_custom.attr.mode |= S_IWUSR|S_IWGRP;
 373         }
 374
 375         acnt = 0;
 376         cip->attr_gen[acnt++] = &cip->attr_name.attr;
 377         cip->attr_gen[acnt++] = &cip->attr_type.attr;
 378         cip->attr_gen[acnt++] = &cip->attr_val.attr;
 379         cip->attr_gen[acnt++] = &cip->attr_def.attr;
 380         cip->attr_val.show = show_val_norm;
 381         cip->attr_val.store = store_val_norm;
 382         if (pvr2_ctrl_has_custom_symbols(cptr)) {
 383                 cip->attr_gen[acnt++] = &cip->attr_custom.attr;
 384                 cip->attr_custom.show = show_val_custom;
 385                 cip->attr_custom.store = store_val_custom;
 386         }
 387         switch (pvr2_ctrl_get_type(cptr)) {
 388         case pvr2_ctl_enum:
 389                 // Control is an enumeration
 390                 cip->attr_gen[acnt++] = &cip->attr_enum.attr;
 391                 break;
 392         case pvr2_ctl_int:
 393                 // Control is an integer
 394                 cip->attr_gen[acnt++] = &cip->attr_min.attr;
 395                 cip->attr_gen[acnt++] = &cip->attr_max.attr;
 396                 break;
 397         case pvr2_ctl_bitmask:
 398                 // Control is an bitmask
 399                 cip->attr_gen[acnt++] = &cip->attr_bits.attr;
 400                 break;
 401         default: break;
 402         }
 403
 404         cnt = scnprintf(cip->name,sizeof(cip->name)-1,"ctl_%s",
 405                         pvr2_ctrl_get_name(cptr));
 406         cip->name[cnt] = 0;
 407         cip->grp.name = cip->name;
 408         cip->grp.attrs = cip->attr_gen;
 409
 410         ret = sysfs_create_group(&sfp->class_dev->kobj,&cip->grp);
 411         if (ret) {
 412                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 413                            "sysfs_create_group error: %d",
 414                            ret);
 415                 return;
 416         }
 417         cip->created_ok = !0;
 418 }
 419
 420 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 421 static ssize_t debuginfo_show(struct device *, struct device_attribute *,
 422                               char *);
 423 static ssize_t debugcmd_show(struct device *, struct device_attribute *,
 424                              char *);
 425 static ssize_t debugcmd_store(struct device *, struct device_attribute *,
 426                               const char *, size_t count);
 427
 428 static void pvr2_sysfs_add_debugifc(struct pvr2_sysfs *sfp)
 429 {
 430         struct pvr2_sysfs_debugifc *dip;
 431         int ret;
 432
 433         dip = kzalloc(sizeof(*dip),GFP_KERNEL);
 434         if (!dip) return;
 435         sysfs_attr_init(&dip->attr_debugcmd.attr);
 436         dip->attr_debugcmd.attr.name = "debugcmd";
 437         dip->attr_debugcmd.attr.mode = S_IRUGO|S_IWUSR|S_IWGRP;
 438         dip->attr_debugcmd.show = debugcmd_show;
 439         dip->attr_debugcmd.store = debugcmd_store;
 440         sysfs_attr_init(&dip->attr_debuginfo.attr);
 441         dip->attr_debuginfo.attr.name = "debuginfo";
 442         dip->attr_debuginfo.attr.mode = S_IRUGO;
 443         dip->attr_debuginfo.show = debuginfo_show;
 444         sfp->debugifc = dip;
 445         ret = device_create_file(sfp->class_dev,&dip->attr_debugcmd);
 446         if (ret < 0) {
 447                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 448                            "device_create_file error: %d",
 449                            ret);
 450         } else {
 451                 dip->debugcmd_created_ok = !0;
 452         }
 453         ret = device_create_file(sfp->class_dev,&dip->attr_debuginfo);
 454         if (ret < 0) {
 455                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 456                            "device_create_file error: %d",
 457                            ret);
 458         } else {
 459                 dip->debuginfo_created_ok = !0;
 460         }
 461 }
 462
 463
 464 static void pvr2_sysfs_tear_down_debugifc(struct pvr2_sysfs *sfp)
 465 {
 466         if (!sfp->debugifc) return;
 467         if (sfp->debugifc->debuginfo_created_ok) {
 468                 device_remove_file(sfp->class_dev,
 469                                          &sfp->debugifc->attr_debuginfo);
 470         }
 471         if (sfp->debugifc->debugcmd_created_ok) {
 472                 device_remove_file(sfp->class_dev,
 473                                          &sfp->debugifc->attr_debugcmd);
 474         }
 475         kfree(sfp->debugifc);
 476         sfp->debugifc = NULL;
 477 }
 478 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 479
 480
 481 static void pvr2_sysfs_add_controls(struct pvr2_sysfs *sfp)
 482 {
 483         unsigned int idx,cnt;
 484         cnt = pvr2_hdw_get_ctrl_count(sfp->channel.hdw);
 485         for (idx = 0; idx < cnt; idx++) {
 486                 pvr2_sysfs_add_control(sfp,idx);
 487         }
 488 }
 489
 490
 491 static void pvr2_sysfs_tear_down_controls(struct pvr2_sysfs *sfp)
 492 {
 493         struct pvr2_sysfs_ctl_item *cip1,*cip2;
 494         for (cip1 = sfp->item_first; cip1; cip1 = cip2) {
 495                 cip2 = cip1->item_next;
 496                 if (cip1->created_ok) {
 497                         sysfs_remove_group(&sfp->class_dev->kobj,&cip1->grp);
 498                 }
 499                 pvr2_sysfs_trace("Destroying pvr2_sysfs_ctl_item id=%p",cip1);
 500                 kfree(cip1);
 501         }
 502 }
 503
 504
 505 static void pvr2_sysfs_class_release(struct class *class)
 506 {
 507         struct pvr2_sysfs_class *clp;
 508         clp = container_of(class,struct pvr2_sysfs_class,class);
 509         pvr2_sysfs_trace("Destroying pvr2_sysfs_class id=%p",clp);
 510         kfree(clp);
 511 }
 512
 513
 514 static void pvr2_sysfs_release(struct device *class_dev)
 515 {
 516         pvr2_sysfs_trace("Releasing class_dev id=%p",class_dev);
 517         kfree(class_dev);
 518 }
 519
 520
 521 static void class_dev_destroy(struct pvr2_sysfs *sfp)
 522 {
 523         struct device *dev;
 524         if (!sfp->class_dev) return;
 525 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 526         pvr2_sysfs_tear_down_debugifc(sfp);
 527 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 528         pvr2_sysfs_tear_down_controls(sfp);
 529         if (sfp->hdw_desc_created_ok) {
 530                 device_remove_file(sfp->class_dev,
 531                                    &sfp->attr_hdw_desc);
 532         }
 533         if (sfp->hdw_name_created_ok) {
 534                 device_remove_file(sfp->class_dev,
 535                                    &sfp->attr_hdw_name);
 536         }
 537         if (sfp->bus_info_created_ok) {
 538                 device_remove_file(sfp->class_dev,
 539                                          &sfp->attr_bus_info);
 540         }
 541         if (sfp->v4l_minor_number_created_ok) {
 542                 device_remove_file(sfp->class_dev,
 543                                          &sfp->attr_v4l_minor_number);
 544         }
 545         if (sfp->v4l_radio_minor_number_created_ok) {
 546                 device_remove_file(sfp->class_dev,
 547                                          &sfp->attr_v4l_radio_minor_number);
 548         }
 549         if (sfp->unit_number_created_ok) {
 550                 device_remove_file(sfp->class_dev,
 551                                          &sfp->attr_unit_number);
 552         }
 553         pvr2_sysfs_trace("Destroying class_dev id=%p",sfp->class_dev);
 554         dev_set_drvdata(sfp->class_dev, NULL);
 555         dev = sfp->class_dev->parent;
 556         sfp->class_dev->parent = NULL;
 557         put_device(dev);
 558         device_unregister(sfp->class_dev);
 559         sfp->class_dev = NULL;
 560 }
 561
 562
 563 static ssize_t v4l_minor_number_show(struct device *class_dev,
 564                                      struct device_attribute *attr, char *buf)
 565 {
 566         struct pvr2_sysfs *sfp;
 567         sfp = dev_get_drvdata(class_dev);
 568         if (!sfp) return -EINVAL;
 569         return scnprintf(buf,PAGE_SIZE,"%d\n",
 570                          pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
 571                                                        pvr2_v4l_type_video));
 572 }
 573
 574
 575 static ssize_t bus_info_show(struct device *class_dev,
 576                              struct device_attribute *attr, char *buf)
 577 {
 578         struct pvr2_sysfs *sfp;
 579         sfp = dev_get_drvdata(class_dev);
 580         if (!sfp) return -EINVAL;
 581         return scnprintf(buf,PAGE_SIZE,"%s\n",
 582                          pvr2_hdw_get_bus_info(sfp->channel.hdw));
 583 }
 584
 585
 586 static ssize_t hdw_name_show(struct device *class_dev,
 587                              struct device_attribute *attr, char *buf)
 588 {
 589         struct pvr2_sysfs *sfp;
 590         sfp = dev_get_drvdata(class_dev);
 591         if (!sfp) return -EINVAL;
 592         return scnprintf(buf,PAGE_SIZE,"%s\n",
 593                          pvr2_hdw_get_type(sfp->channel.hdw));
 594 }
 595
 596
 597 static ssize_t hdw_desc_show(struct device *class_dev,
 598                              struct device_attribute *attr, char *buf)
 599 {
 600         struct pvr2_sysfs *sfp;
 601         sfp = dev_get_drvdata(class_dev);
 602         if (!sfp) return -EINVAL;
 603         return scnprintf(buf,PAGE_SIZE,"%s\n",
 604                          pvr2_hdw_get_desc(sfp->channel.hdw));
 605 }
 606
 607
 608 static ssize_t v4l_radio_minor_number_show(struct device *class_dev,
 609                                            struct device_attribute *attr,
 610                                            char *buf)
 611 {
 612         struct pvr2_sysfs *sfp;
 613         sfp = dev_get_drvdata(class_dev);
 614         if (!sfp) return -EINVAL;
 615         return scnprintf(buf,PAGE_SIZE,"%d\n",
 616                          pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
 617                                                        pvr2_v4l_type_radio));
 618 }
 619
 620
 621 static ssize_t unit_number_show(struct device *class_dev,
 622                                 struct device_attribute *attr, char *buf)
 623 {
 624         struct pvr2_sysfs *sfp;
 625         sfp = dev_get_drvdata(class_dev);
 626         if (!sfp) return -EINVAL;
 627         return scnprintf(buf,PAGE_SIZE,"%d\n",
 628                          pvr2_hdw_get_unit_number(sfp->channel.hdw));
 629 }
 630
 631
 632 static void class_dev_create(struct pvr2_sysfs *sfp,
 633                              struct pvr2_sysfs_class *class_ptr)
 634 {
 635         struct usb_device *usb_dev;
 636         struct device *class_dev;
 637         int ret;
 638
 639         usb_dev = pvr2_hdw_get_dev(sfp->channel.hdw);
 640         if (!usb_dev) return;
 641         class_dev = kzalloc(sizeof(*class_dev),GFP_KERNEL);
 642         if (!class_dev) return;
 643
 644         pvr2_sysfs_trace("Creating class_dev id=%p",class_dev);
 645
 646         class_dev->class = &class_ptr->class;
 647
 648         dev_set_name(class_dev, "%s",
 649                      pvr2_hdw_get_device_identifier(sfp->channel.hdw));
 650
 651         class_dev->parent = get_device(&usb_dev->dev);
 652
 653         sfp->class_dev = class_dev;
 654         dev_set_drvdata(class_dev, sfp);
 655         ret = device_register(class_dev);
 656         if (ret) {
 657                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 658                            "device_register failed");
 659                 put_device(class_dev);
 660                 return;
 661         }
 662
 663         sysfs_attr_init(&sfp->attr_v4l_minor_number.attr);
 664         sfp->attr_v4l_minor_number.attr.name = "v4l_minor_number";
 665         sfp->attr_v4l_minor_number.attr.mode = S_IRUGO;
 666         sfp->attr_v4l_minor_number.show = v4l_minor_number_show;
 667         sfp->attr_v4l_minor_number.store = NULL;
 668         ret = device_create_file(sfp->class_dev,
 669                                        &sfp->attr_v4l_minor_number);
 670         if (ret < 0) {
 671                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 672                            "device_create_file error: %d",
 673                            ret);
 674         } else {
 675                 sfp->v4l_minor_number_created_ok = !0;
 676         }
 677
 678         sysfs_attr_init(&sfp->attr_v4l_radio_minor_number.attr);
 679         sfp->attr_v4l_radio_minor_number.attr.name = "v4l_radio_minor_number";
 680         sfp->attr_v4l_radio_minor_number.attr.mode = S_IRUGO;
 681         sfp->attr_v4l_radio_minor_number.show = v4l_radio_minor_number_show;
 682         sfp->attr_v4l_radio_minor_number.store = NULL;
 683         ret = device_create_file(sfp->class_dev,
 684                                        &sfp->attr_v4l_radio_minor_number);
 685         if (ret < 0) {
 686                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 687                            "device_create_file error: %d",
 688                            ret);
 689         } else {
 690                 sfp->v4l_radio_minor_number_created_ok = !0;
 691         }
 692
 693         sysfs_attr_init(&sfp->attr_unit_number.attr);
 694         sfp->attr_unit_number.attr.name = "unit_number";
 695         sfp->attr_unit_number.attr.mode = S_IRUGO;
 696         sfp->attr_unit_number.show = unit_number_show;
 697         sfp->attr_unit_number.store = NULL;
 698         ret = device_create_file(sfp->class_dev,&sfp->attr_unit_number);
 699         if (ret < 0) {
 700                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 701                            "device_create_file error: %d",
 702                            ret);
 703         } else {
 704                 sfp->unit_number_created_ok = !0;
 705         }
 706
 707         sysfs_attr_init(&sfp->attr_bus_info.attr);
 708         sfp->attr_bus_info.attr.name = "bus_info_str";
 709         sfp->attr_bus_info.attr.mode = S_IRUGO;
 710         sfp->attr_bus_info.show = bus_info_show;
 711         sfp->attr_bus_info.store = NULL;
 712         ret = device_create_file(sfp->class_dev,
 713                                        &sfp->attr_bus_info);
 714         if (ret < 0) {
 715                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 716                            "device_create_file error: %d",
 717                            ret);
 718         } else {
 719                 sfp->bus_info_created_ok = !0;
 720         }
 721
 722         sysfs_attr_init(&sfp->attr_hdw_name.attr);
 723         sfp->attr_hdw_name.attr.name = "device_hardware_type";
 724         sfp->attr_hdw_name.attr.mode = S_IRUGO;
 725         sfp->attr_hdw_name.show = hdw_name_show;
 726         sfp->attr_hdw_name.store = NULL;
 727         ret = device_create_file(sfp->class_dev,
 728                                  &sfp->attr_hdw_name);
 729         if (ret < 0) {
 730                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 731                            "device_create_file error: %d",
 732                            ret);
 733         } else {
 734                 sfp->hdw_name_created_ok = !0;
 735         }
 736
 737         sysfs_attr_init(&sfp->attr_hdw_desc.attr);
 738         sfp->attr_hdw_desc.attr.name = "device_hardware_description";
 739         sfp->attr_hdw_desc.attr.mode = S_IRUGO;
 740         sfp->attr_hdw_desc.show = hdw_desc_show;
 741         sfp->attr_hdw_desc.store = NULL;
 742         ret = device_create_file(sfp->class_dev,
 743                                  &sfp->attr_hdw_desc);
 744         if (ret < 0) {
 745                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 746                            "device_create_file error: %d",
 747                            ret);
 748         } else {
 749                 sfp->hdw_desc_created_ok = !0;
 750         }
 751
 752         pvr2_sysfs_add_controls(sfp);
 753 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 754         pvr2_sysfs_add_debugifc(sfp);
 755 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 756 }
 757
 758
 759 static void pvr2_sysfs_internal_check(struct pvr2_channel *chp)
 760 {
 761         struct pvr2_sysfs *sfp;
 762         sfp = container_of(chp,struct pvr2_sysfs,channel);
 763         if (!sfp->channel.mc_head->disconnect_flag) return;
 764         pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_sysfs id=%p",sfp);
 765         class_dev_destroy(sfp);
 766         pvr2_channel_done(&sfp->channel);
 767         kfree(sfp);
 768 }
 769
 770
 771 struct pvr2_sysfs *pvr2_sysfs_create(struct pvr2_context *mp,
 772                                      struct pvr2_sysfs_class *class_ptr)
 773 {
 774         struct pvr2_sysfs *sfp;
 775         sfp = kzalloc(sizeof(*sfp),GFP_KERNEL);
 776         if (!sfp) return sfp;
 777         pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_sysfs id=%p",sfp);
 778         pvr2_channel_init(&sfp->channel,mp);
 779         sfp->channel.check_func = pvr2_sysfs_internal_check;
 780
 781         class_dev_create(sfp,class_ptr);
 782         return sfp;
 783 }
 784
 785
 786
 787 struct pvr2_sysfs_class *pvr2_sysfs_class_create(void)
 788 {
 789         struct pvr2_sysfs_class *clp;
 790         clp = kzalloc(sizeof(*clp),GFP_KERNEL);
 791         if (!clp) return clp;
 792         pvr2_sysfs_trace("Creating and registering pvr2_sysfs_class id=%p",
 793                          clp);
 794         clp->class.name = "pvrusb2";
 795         clp->class.class_release = pvr2_sysfs_class_release;
 796         clp->class.dev_release = pvr2_sysfs_release;
 797         if (class_register(&clp->class)) {
 798                 pvr2_sysfs_trace(
 799                         "Registration failed for pvr2_sysfs_class id=%p",clp);
 800                 kfree(clp);
 801                 clp = NULL;
 802         }
 803         return clp;
 804 }
 805
 806
 807 void pvr2_sysfs_class_destroy(struct pvr2_sysfs_class *clp)
 808 {
 809         pvr2_sysfs_trace("Unregistering pvr2_sysfs_class id=%p", clp);
 810         class_unregister(&clp->class);
 811 }
 812
 813
 814 #ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
 815 static ssize_t debuginfo_show(struct device *class_dev,
 816                               struct device_attribute *attr, char *buf)
 817 {
 818         struct pvr2_sysfs *sfp;
 819         sfp = dev_get_drvdata(class_dev);
 820         if (!sfp) return -EINVAL;
 821         pvr2_hdw_trigger_module_log(sfp->channel.hdw);
 822         return pvr2_debugifc_print_info(sfp->channel.hdw,buf,PAGE_SIZE);
 823 }
 824
 825
 826 static ssize_t debugcmd_show(struct device *class_dev,
 827                              struct device_attribute *attr, char *buf)
 828 {
 829         struct pvr2_sysfs *sfp;
 830         sfp = dev_get_drvdata(class_dev);
 831         if (!sfp) return -EINVAL;
 832         return pvr2_debugifc_print_status(sfp->channel.hdw,buf,PAGE_SIZE);
 833 }
 834
 835
 836 static ssize_t debugcmd_store(struct device *class_dev,
 837                               struct device_attribute *attr,
 838                               const char *buf, size_t count)
 839 {
 840         struct pvr2_sysfs *sfp;
 841         int ret;
 842
 843         sfp = dev_get_drvdata(class_dev);
 844         if (!sfp) return -EINVAL;
 845
 846         ret = pvr2_debugifc_docmd(sfp->channel.hdw,buf,count);
 847         if (ret < 0) return ret;
 848         return count;
 849 }
 850 #endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
 851
 852
 853 /*
 854   Stuff for Emacs to see, in order to encourage consistent editing style:
 855   *** Local Variables: ***
 856   *** mode: c ***
 857   *** fill-column: 75 ***
 858   *** tab-width: 8 ***
 859   *** c-basic-offset: 8 ***
 860   *** End: ***
 861   */