kernel/drivers/media/common/siano/smsdvb-debugfs.c

   1 /***********************************************************************
   2  *
   3  * Copyright(c) 2013 Mauro Carvalho Chehab
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   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, see <http://www.gnu.org/licenses/>.
  17  *
  18  ***********************************************************************/
  19
  20 #include "smscoreapi.h"
  21
  22 #include <linux/module.h>
  23 #include <linux/slab.h>
  24 #include <linux/init.h>
  25 #include <linux/debugfs.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/usb.h>
  28
  29 #include "dmxdev.h"
  30 #include "dvbdev.h"
  31 #include "dvb_demux.h"
  32 #include "dvb_frontend.h"
  33
  34 #include "smsdvb.h"
  35
  36 static struct dentry *smsdvb_debugfs_usb_root;
  37
  38 struct smsdvb_debugfs {
  39         struct kref             refcount;
  40         spinlock_t              lock;
  41
  42         char                    stats_data[PAGE_SIZE];
  43         unsigned                stats_count;
  44         bool                    stats_was_read;
  45
  46         wait_queue_head_t       stats_queue;
  47 };
  48
  49 static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
  50                             struct sms_stats *p)
  51 {
  52         int n = 0;
  53         char *buf;
  54
  55         spin_lock(&debug_data->lock);
  56         if (debug_data->stats_count) {
  57                 spin_unlock(&debug_data->lock);
  58                 return;
  59         }
  60
  61         buf = debug_data->stats_data;
  62
  63         n += snprintf(&buf[n], PAGE_SIZE - n,
  64                       "is_rf_locked = %d\n", p->is_rf_locked);
  65         n += snprintf(&buf[n], PAGE_SIZE - n,
  66                       "is_demod_locked = %d\n", p->is_demod_locked);
  67         n += snprintf(&buf[n], PAGE_SIZE - n,
  68                       "is_external_lna_on = %d\n", p->is_external_lna_on);
  69         n += snprintf(&buf[n], PAGE_SIZE - n,
  70                       "SNR = %d\n", p->SNR);
  71         n += snprintf(&buf[n], PAGE_SIZE - n,
  72                       "ber = %d\n", p->ber);
  73         n += snprintf(&buf[n], PAGE_SIZE - n,
  74                       "FIB_CRC = %d\n", p->FIB_CRC);
  75         n += snprintf(&buf[n], PAGE_SIZE - n,
  76                       "ts_per = %d\n", p->ts_per);
  77         n += snprintf(&buf[n], PAGE_SIZE - n,
  78                       "MFER = %d\n", p->MFER);
  79         n += snprintf(&buf[n], PAGE_SIZE - n,
  80                       "RSSI = %d\n", p->RSSI);
  81         n += snprintf(&buf[n], PAGE_SIZE - n,
  82                       "in_band_pwr = %d\n", p->in_band_pwr);
  83         n += snprintf(&buf[n], PAGE_SIZE - n,
  84                       "carrier_offset = %d\n", p->carrier_offset);
  85         n += snprintf(&buf[n], PAGE_SIZE - n,
  86                       "modem_state = %d\n", p->modem_state);
  87         n += snprintf(&buf[n], PAGE_SIZE - n,
  88                       "frequency = %d\n", p->frequency);
  89         n += snprintf(&buf[n], PAGE_SIZE - n,
  90                       "bandwidth = %d\n", p->bandwidth);
  91         n += snprintf(&buf[n], PAGE_SIZE - n,
  92                       "transmission_mode = %d\n", p->transmission_mode);
  93         n += snprintf(&buf[n], PAGE_SIZE - n,
  94                       "modem_state = %d\n", p->modem_state);
  95         n += snprintf(&buf[n], PAGE_SIZE - n,
  96                       "guard_interval = %d\n", p->guard_interval);
  97         n += snprintf(&buf[n], PAGE_SIZE - n,
  98                       "code_rate = %d\n", p->code_rate);
  99         n += snprintf(&buf[n], PAGE_SIZE - n,
 100                       "lp_code_rate = %d\n", p->lp_code_rate);
 101         n += snprintf(&buf[n], PAGE_SIZE - n,
 102                       "hierarchy = %d\n", p->hierarchy);
 103         n += snprintf(&buf[n], PAGE_SIZE - n,
 104                       "constellation = %d\n", p->constellation);
 105         n += snprintf(&buf[n], PAGE_SIZE - n,
 106                       "burst_size = %d\n", p->burst_size);
 107         n += snprintf(&buf[n], PAGE_SIZE - n,
 108                       "burst_duration = %d\n", p->burst_duration);
 109         n += snprintf(&buf[n], PAGE_SIZE - n,
 110                       "burst_cycle_time = %d\n", p->burst_cycle_time);
 111         n += snprintf(&buf[n], PAGE_SIZE - n,
 112                       "calc_burst_cycle_time = %d\n",
 113                       p->calc_burst_cycle_time);
 114         n += snprintf(&buf[n], PAGE_SIZE - n,
 115                       "num_of_rows = %d\n", p->num_of_rows);
 116         n += snprintf(&buf[n], PAGE_SIZE - n,
 117                       "num_of_padd_cols = %d\n", p->num_of_padd_cols);
 118         n += snprintf(&buf[n], PAGE_SIZE - n,
 119                       "num_of_punct_cols = %d\n", p->num_of_punct_cols);
 120         n += snprintf(&buf[n], PAGE_SIZE - n,
 121                       "error_ts_packets = %d\n", p->error_ts_packets);
 122         n += snprintf(&buf[n], PAGE_SIZE - n,
 123                       "total_ts_packets = %d\n", p->total_ts_packets);
 124         n += snprintf(&buf[n], PAGE_SIZE - n,
 125                       "num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
 126         n += snprintf(&buf[n], PAGE_SIZE - n,
 127                       "num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
 128         n += snprintf(&buf[n], PAGE_SIZE - n,
 129                       "num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
 130         n += snprintf(&buf[n], PAGE_SIZE - n,
 131                       "ber_error_count = %d\n", p->ber_error_count);
 132         n += snprintf(&buf[n], PAGE_SIZE - n,
 133                       "ber_bit_count = %d\n", p->ber_bit_count);
 134         n += snprintf(&buf[n], PAGE_SIZE - n,
 135                       "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
 136         n += snprintf(&buf[n], PAGE_SIZE - n,
 137                       "pre_ber = %d\n", p->pre_ber);
 138         n += snprintf(&buf[n], PAGE_SIZE - n,
 139                       "cell_id = %d\n", p->cell_id);
 140         n += snprintf(&buf[n], PAGE_SIZE - n,
 141                       "dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
 142         n += snprintf(&buf[n], PAGE_SIZE - n,
 143                       "dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
 144         n += snprintf(&buf[n], PAGE_SIZE - n,
 145                       "num_mpe_received = %d\n", p->num_mpe_received);
 146
 147         debug_data->stats_count = n;
 148         spin_unlock(&debug_data->lock);
 149         wake_up(&debug_data->stats_queue);
 150 }
 151
 152 static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
 153                              struct sms_isdbt_stats *p)
 154 {
 155         int i, n = 0;
 156         char *buf;
 157
 158         spin_lock(&debug_data->lock);
 159         if (debug_data->stats_count) {
 160                 spin_unlock(&debug_data->lock);
 161                 return;
 162         }
 163
 164         buf = debug_data->stats_data;
 165
 166         n += snprintf(&buf[n], PAGE_SIZE - n,
 167                       "statistics_type = %d\t", p->statistics_type);
 168         n += snprintf(&buf[n], PAGE_SIZE - n,
 169                       "full_size = %d\n", p->full_size);
 170
 171         n += snprintf(&buf[n], PAGE_SIZE - n,
 172                       "is_rf_locked = %d\t\t", p->is_rf_locked);
 173         n += snprintf(&buf[n], PAGE_SIZE - n,
 174                       "is_demod_locked = %d\t", p->is_demod_locked);
 175         n += snprintf(&buf[n], PAGE_SIZE - n,
 176                       "is_external_lna_on = %d\n", p->is_external_lna_on);
 177         n += snprintf(&buf[n], PAGE_SIZE - n,
 178                       "SNR = %d dB\t\t", p->SNR);
 179         n += snprintf(&buf[n], PAGE_SIZE - n,
 180                       "RSSI = %d dBm\t\t", p->RSSI);
 181         n += snprintf(&buf[n], PAGE_SIZE - n,
 182                       "in_band_pwr = %d dBm\n", p->in_band_pwr);
 183         n += snprintf(&buf[n], PAGE_SIZE - n,
 184                       "carrier_offset = %d\t", p->carrier_offset);
 185         n += snprintf(&buf[n], PAGE_SIZE - n,
 186                       "bandwidth = %d\t\t", p->bandwidth);
 187         n += snprintf(&buf[n], PAGE_SIZE - n,
 188                       "frequency = %d Hz\n", p->frequency);
 189         n += snprintf(&buf[n], PAGE_SIZE - n,
 190                       "transmission_mode = %d\t", p->transmission_mode);
 191         n += snprintf(&buf[n], PAGE_SIZE - n,
 192                       "modem_state = %d\t\t", p->modem_state);
 193         n += snprintf(&buf[n], PAGE_SIZE - n,
 194                       "guard_interval = %d\n", p->guard_interval);
 195         n += snprintf(&buf[n], PAGE_SIZE - n,
 196                       "system_type = %d\t\t", p->system_type);
 197         n += snprintf(&buf[n], PAGE_SIZE - n,
 198                       "partial_reception = %d\t", p->partial_reception);
 199         n += snprintf(&buf[n], PAGE_SIZE - n,
 200                       "num_of_layers = %d\n", p->num_of_layers);
 201         n += snprintf(&buf[n], PAGE_SIZE - n,
 202                       "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
 203
 204         for (i = 0; i < 3; i++) {
 205                 if (p->layer_info[i].number_of_segments < 1 ||
 206                     p->layer_info[i].number_of_segments > 13)
 207                         continue;
 208
 209                 n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
 210                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
 211                               p->layer_info[i].code_rate);
 212                 n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 213                               p->layer_info[i].constellation);
 214                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
 215                               p->layer_info[i].ber);
 216                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
 217                               p->layer_info[i].ber_error_count);
 218                 n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 219                               p->layer_info[i].ber_bit_count);
 220                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 221                               p->layer_info[i].pre_ber);
 222                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
 223                               p->layer_info[i].ts_per);
 224                 n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
 225                               p->layer_info[i].error_ts_packets);
 226                 n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
 227                               p->layer_info[i].total_ts_packets);
 228                 n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 229                               p->layer_info[i].ti_ldepth_i);
 230                 n += snprintf(&buf[n], PAGE_SIZE - n,
 231                               "\tnumber_of_segments = %d\t",
 232                               p->layer_info[i].number_of_segments);
 233                 n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 234                               p->layer_info[i].tmcc_errors);
 235         }
 236
 237         debug_data->stats_count = n;
 238         spin_unlock(&debug_data->lock);
 239         wake_up(&debug_data->stats_queue);
 240 }
 241
 242 static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
 243                                 struct sms_isdbt_stats_ex *p)
 244 {
 245         int i, n = 0;
 246         char *buf;
 247
 248         spin_lock(&debug_data->lock);
 249         if (debug_data->stats_count) {
 250                 spin_unlock(&debug_data->lock);
 251                 return;
 252         }
 253
 254         buf = debug_data->stats_data;
 255
 256         n += snprintf(&buf[n], PAGE_SIZE - n,
 257                       "statistics_type = %d\t", p->statistics_type);
 258         n += snprintf(&buf[n], PAGE_SIZE - n,
 259                       "full_size = %d\n", p->full_size);
 260
 261         n += snprintf(&buf[n], PAGE_SIZE - n,
 262                       "is_rf_locked = %d\t\t", p->is_rf_locked);
 263         n += snprintf(&buf[n], PAGE_SIZE - n,
 264                       "is_demod_locked = %d\t", p->is_demod_locked);
 265         n += snprintf(&buf[n], PAGE_SIZE - n,
 266                       "is_external_lna_on = %d\n", p->is_external_lna_on);
 267         n += snprintf(&buf[n], PAGE_SIZE - n,
 268                       "SNR = %d dB\t\t", p->SNR);
 269         n += snprintf(&buf[n], PAGE_SIZE - n,
 270                       "RSSI = %d dBm\t\t", p->RSSI);
 271         n += snprintf(&buf[n], PAGE_SIZE - n,
 272                       "in_band_pwr = %d dBm\n", p->in_band_pwr);
 273         n += snprintf(&buf[n], PAGE_SIZE - n,
 274                       "carrier_offset = %d\t", p->carrier_offset);
 275         n += snprintf(&buf[n], PAGE_SIZE - n,
 276                       "bandwidth = %d\t\t", p->bandwidth);
 277         n += snprintf(&buf[n], PAGE_SIZE - n,
 278                       "frequency = %d Hz\n", p->frequency);
 279         n += snprintf(&buf[n], PAGE_SIZE - n,
 280                       "transmission_mode = %d\t", p->transmission_mode);
 281         n += snprintf(&buf[n], PAGE_SIZE - n,
 282                       "modem_state = %d\t\t", p->modem_state);
 283         n += snprintf(&buf[n], PAGE_SIZE - n,
 284                       "guard_interval = %d\n", p->guard_interval);
 285         n += snprintf(&buf[n], PAGE_SIZE - n,
 286                       "system_type = %d\t\t", p->system_type);
 287         n += snprintf(&buf[n], PAGE_SIZE - n,
 288                       "partial_reception = %d\t", p->partial_reception);
 289         n += snprintf(&buf[n], PAGE_SIZE - n,
 290                       "num_of_layers = %d\n", p->num_of_layers);
 291         n += snprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
 292                       p->segment_number);
 293         n += snprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
 294                       p->tune_bw);
 295
 296         for (i = 0; i < 3; i++) {
 297                 if (p->layer_info[i].number_of_segments < 1 ||
 298                     p->layer_info[i].number_of_segments > 13)
 299                         continue;
 300
 301                 n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
 302                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
 303                               p->layer_info[i].code_rate);
 304                 n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 305                               p->layer_info[i].constellation);
 306                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
 307                               p->layer_info[i].ber);
 308                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
 309                               p->layer_info[i].ber_error_count);
 310                 n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 311                               p->layer_info[i].ber_bit_count);
 312                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 313                               p->layer_info[i].pre_ber);
 314                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
 315                               p->layer_info[i].ts_per);
 316                 n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
 317                               p->layer_info[i].error_ts_packets);
 318                 n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
 319                               p->layer_info[i].total_ts_packets);
 320                 n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 321                               p->layer_info[i].ti_ldepth_i);
 322                 n += snprintf(&buf[n], PAGE_SIZE - n,
 323                               "\tnumber_of_segments = %d\t",
 324                               p->layer_info[i].number_of_segments);
 325                 n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 326                               p->layer_info[i].tmcc_errors);
 327         }
 328
 329
 330         debug_data->stats_count = n;
 331         spin_unlock(&debug_data->lock);
 332
 333         wake_up(&debug_data->stats_queue);
 334 }
 335
 336 static int smsdvb_stats_open(struct inode *inode, struct file *file)
 337 {
 338         struct smsdvb_client_t *client = inode->i_private;
 339         struct smsdvb_debugfs *debug_data = client->debug_data;
 340
 341         kref_get(&debug_data->refcount);
 342
 343         spin_lock(&debug_data->lock);
 344         debug_data->stats_count = 0;
 345         debug_data->stats_was_read = false;
 346         spin_unlock(&debug_data->lock);
 347
 348         file->private_data = debug_data;
 349
 350         return 0;
 351 }
 352
 353 static void smsdvb_debugfs_data_release(struct kref *ref)
 354 {
 355         struct smsdvb_debugfs *debug_data;
 356
 357         debug_data = container_of(ref, struct smsdvb_debugfs, refcount);
 358         kfree(debug_data);
 359 }
 360
 361 static int smsdvb_stats_wait_read(struct smsdvb_debugfs *debug_data)
 362 {
 363         int rc = 1;
 364
 365         spin_lock(&debug_data->lock);
 366
 367         if (debug_data->stats_was_read)
 368                 goto exit;
 369
 370         rc = debug_data->stats_count;
 371
 372 exit:
 373         spin_unlock(&debug_data->lock);
 374         return rc;
 375 }
 376
 377 static unsigned int smsdvb_stats_poll(struct file *file, poll_table *wait)
 378 {
 379         struct smsdvb_debugfs *debug_data = file->private_data;
 380         int rc;
 381
 382         kref_get(&debug_data->refcount);
 383
 384         poll_wait(file, &debug_data->stats_queue, wait);
 385
 386         rc = smsdvb_stats_wait_read(debug_data);
 387         if (rc > 0)
 388                 rc = POLLIN | POLLRDNORM;
 389
 390         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 391
 392         return rc;
 393 }
 394
 395 static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
 396                                       size_t nbytes, loff_t *ppos)
 397 {
 398         int rc = 0, len;
 399         struct smsdvb_debugfs *debug_data = file->private_data;
 400
 401         kref_get(&debug_data->refcount);
 402
 403         if (file->f_flags & O_NONBLOCK) {
 404                 rc = smsdvb_stats_wait_read(debug_data);
 405                 if (!rc) {
 406                         rc = -EWOULDBLOCK;
 407                         goto ret;
 408                 }
 409         } else {
 410                 rc = wait_event_interruptible(debug_data->stats_queue,
 411                                       smsdvb_stats_wait_read(debug_data));
 412                 if (rc < 0)
 413                         goto ret;
 414         }
 415
 416         if (debug_data->stats_was_read) {
 417                 rc = 0; /* EOF */
 418                 goto ret;
 419         }
 420
 421         len = debug_data->stats_count - *ppos;
 422         if (len >= 0)
 423                 rc = simple_read_from_buffer(user_buf, nbytes, ppos,
 424                                              debug_data->stats_data, len);
 425         else
 426                 rc = 0;
 427
 428         if (*ppos >= debug_data->stats_count) {
 429                 spin_lock(&debug_data->lock);
 430                 debug_data->stats_was_read = true;
 431                 spin_unlock(&debug_data->lock);
 432         }
 433 ret:
 434         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 435         return rc;
 436 }
 437
 438 static int smsdvb_stats_release(struct inode *inode, struct file *file)
 439 {
 440         struct smsdvb_debugfs *debug_data = file->private_data;
 441
 442         spin_lock(&debug_data->lock);
 443         debug_data->stats_was_read = true;      /* return EOF to read() */
 444         spin_unlock(&debug_data->lock);
 445         wake_up_interruptible_sync(&debug_data->stats_queue);
 446
 447         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 448         file->private_data = NULL;
 449
 450         return 0;
 451 }
 452
 453 static const struct file_operations debugfs_stats_ops = {
 454         .open = smsdvb_stats_open,
 455         .poll = smsdvb_stats_poll,
 456         .read = smsdvb_stats_read,
 457         .release = smsdvb_stats_release,
 458         .llseek = generic_file_llseek,
 459 };
 460
 461 /*
 462  * Functions used by smsdvb, in order to create the interfaces
 463  */
 464
 465 int smsdvb_debugfs_create(struct smsdvb_client_t *client)
 466 {
 467         struct smscore_device_t *coredev = client->coredev;
 468         struct dentry *d;
 469         struct smsdvb_debugfs *debug_data;
 470
 471         if (!smsdvb_debugfs_usb_root || !coredev->is_usb_device)
 472                 return -ENODEV;
 473
 474         client->debugfs = debugfs_create_dir(coredev->devpath,
 475                                              smsdvb_debugfs_usb_root);
 476         if (IS_ERR_OR_NULL(client->debugfs)) {
 477                 pr_info("Unable to create debugfs %s directory.\n",
 478                         coredev->devpath);
 479                 return -ENODEV;
 480         }
 481
 482         d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
 483                                 client, &debugfs_stats_ops);
 484         if (!d) {
 485                 debugfs_remove(client->debugfs);
 486                 return -ENOMEM;
 487         }
 488
 489         debug_data = kzalloc(sizeof(*client->debug_data), GFP_KERNEL);
 490         if (!debug_data)
 491                 return -ENOMEM;
 492
 493         client->debug_data        = debug_data;
 494         client->prt_dvb_stats     = smsdvb_print_dvb_stats;
 495         client->prt_isdb_stats    = smsdvb_print_isdb_stats;
 496         client->prt_isdb_stats_ex = smsdvb_print_isdb_stats_ex;
 497
 498         init_waitqueue_head(&debug_data->stats_queue);
 499         spin_lock_init(&debug_data->lock);
 500         kref_init(&debug_data->refcount);
 501
 502         return 0;
 503 }
 504
 505 void smsdvb_debugfs_release(struct smsdvb_client_t *client)
 506 {
 507         if (!client->debugfs)
 508                 return;
 509
 510         client->prt_dvb_stats     = NULL;
 511         client->prt_isdb_stats    = NULL;
 512         client->prt_isdb_stats_ex = NULL;
 513
 514         debugfs_remove_recursive(client->debugfs);
 515         kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
 516
 517         client->debug_data = NULL;
 518         client->debugfs = NULL;
 519 }
 520
 521 int smsdvb_debugfs_register(void)
 522 {
 523         struct dentry *d;
 524
 525         /*
 526          * FIXME: This was written to debug Siano USB devices. So, it creates
 527          * the debugfs node under <debugfs>/usb.
 528          * A similar logic would be needed for Siano sdio devices, but, in that
 529          * case, usb_debug_root is not a good choice.
 530          *
 531          * Perhaps the right fix here would be to create another sysfs root
 532          * node for sdio-based boards, but this may need some logic at sdio
 533          * subsystem.
 534          */
 535         d = debugfs_create_dir("smsdvb", usb_debug_root);
 536         if (IS_ERR_OR_NULL(d)) {
 537                 pr_err("Couldn't create sysfs node for smsdvb\n");
 538                 return PTR_ERR(d);
 539         } else {
 540                 smsdvb_debugfs_usb_root = d;
 541         }
 542         return 0;
 543 }
 544
 545 void smsdvb_debugfs_unregister(void)
 546 {
 547         debugfs_remove_recursive(smsdvb_debugfs_usb_root);
 548         smsdvb_debugfs_usb_root = NULL;
 549 }