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

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Copyright(c) 2013 Mauro Carvalho Chehab
   4
   5 #include "smscoreapi.h"
   6
   7 #include <linux/module.h>
   8 #include <linux/slab.h>
   9 #include <linux/init.h>
  10 #include <linux/debugfs.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/usb.h>
  13
  14 #include <media/dmxdev.h>
  15 #include <media/dvbdev.h>
  16 #include <media/dvb_demux.h>
  17 #include <media/dvb_frontend.h>
  18
  19 #include "smsdvb.h"
  20
  21 static struct dentry *smsdvb_debugfs_usb_root;
  22
  23 struct smsdvb_debugfs {
  24         struct kref             refcount;
  25         spinlock_t              lock;
  26
  27         char                    stats_data[PAGE_SIZE];
  28         unsigned                stats_count;
  29         bool                    stats_was_read;
  30
  31         wait_queue_head_t       stats_queue;
  32 };
  33
  34 static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
  35                             struct sms_stats *p)
  36 {
  37         int n = 0;
  38         char *buf;
  39
  40         spin_lock(&debug_data->lock);
  41         if (debug_data->stats_count) {
  42                 spin_unlock(&debug_data->lock);
  43                 return;
  44         }
  45
  46         buf = debug_data->stats_data;
  47
  48         n += scnprintf(&buf[n], PAGE_SIZE - n,
  49                       "is_rf_locked = %d\n", p->is_rf_locked);
  50         n += scnprintf(&buf[n], PAGE_SIZE - n,
  51                       "is_demod_locked = %d\n", p->is_demod_locked);
  52         n += scnprintf(&buf[n], PAGE_SIZE - n,
  53                       "is_external_lna_on = %d\n", p->is_external_lna_on);
  54         n += scnprintf(&buf[n], PAGE_SIZE - n,
  55                       "SNR = %d\n", p->SNR);
  56         n += scnprintf(&buf[n], PAGE_SIZE - n,
  57                       "ber = %d\n", p->ber);
  58         n += scnprintf(&buf[n], PAGE_SIZE - n,
  59                       "FIB_CRC = %d\n", p->FIB_CRC);
  60         n += scnprintf(&buf[n], PAGE_SIZE - n,
  61                       "ts_per = %d\n", p->ts_per);
  62         n += scnprintf(&buf[n], PAGE_SIZE - n,
  63                       "MFER = %d\n", p->MFER);
  64         n += scnprintf(&buf[n], PAGE_SIZE - n,
  65                       "RSSI = %d\n", p->RSSI);
  66         n += scnprintf(&buf[n], PAGE_SIZE - n,
  67                       "in_band_pwr = %d\n", p->in_band_pwr);
  68         n += scnprintf(&buf[n], PAGE_SIZE - n,
  69                       "carrier_offset = %d\n", p->carrier_offset);
  70         n += scnprintf(&buf[n], PAGE_SIZE - n,
  71                       "modem_state = %d\n", p->modem_state);
  72         n += scnprintf(&buf[n], PAGE_SIZE - n,
  73                       "frequency = %d\n", p->frequency);
  74         n += scnprintf(&buf[n], PAGE_SIZE - n,
  75                       "bandwidth = %d\n", p->bandwidth);
  76         n += scnprintf(&buf[n], PAGE_SIZE - n,
  77                       "transmission_mode = %d\n", p->transmission_mode);
  78         n += scnprintf(&buf[n], PAGE_SIZE - n,
  79                       "modem_state = %d\n", p->modem_state);
  80         n += scnprintf(&buf[n], PAGE_SIZE - n,
  81                       "guard_interval = %d\n", p->guard_interval);
  82         n += scnprintf(&buf[n], PAGE_SIZE - n,
  83                       "code_rate = %d\n", p->code_rate);
  84         n += scnprintf(&buf[n], PAGE_SIZE - n,
  85                       "lp_code_rate = %d\n", p->lp_code_rate);
  86         n += scnprintf(&buf[n], PAGE_SIZE - n,
  87                       "hierarchy = %d\n", p->hierarchy);
  88         n += scnprintf(&buf[n], PAGE_SIZE - n,
  89                       "constellation = %d\n", p->constellation);
  90         n += scnprintf(&buf[n], PAGE_SIZE - n,
  91                       "burst_size = %d\n", p->burst_size);
  92         n += scnprintf(&buf[n], PAGE_SIZE - n,
  93                       "burst_duration = %d\n", p->burst_duration);
  94         n += scnprintf(&buf[n], PAGE_SIZE - n,
  95                       "burst_cycle_time = %d\n", p->burst_cycle_time);
  96         n += scnprintf(&buf[n], PAGE_SIZE - n,
  97                       "calc_burst_cycle_time = %d\n",
  98                       p->calc_burst_cycle_time);
  99         n += scnprintf(&buf[n], PAGE_SIZE - n,
 100                       "num_of_rows = %d\n", p->num_of_rows);
 101         n += scnprintf(&buf[n], PAGE_SIZE - n,
 102                       "num_of_padd_cols = %d\n", p->num_of_padd_cols);
 103         n += scnprintf(&buf[n], PAGE_SIZE - n,
 104                       "num_of_punct_cols = %d\n", p->num_of_punct_cols);
 105         n += scnprintf(&buf[n], PAGE_SIZE - n,
 106                       "error_ts_packets = %d\n", p->error_ts_packets);
 107         n += scnprintf(&buf[n], PAGE_SIZE - n,
 108                       "total_ts_packets = %d\n", p->total_ts_packets);
 109         n += scnprintf(&buf[n], PAGE_SIZE - n,
 110                       "num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
 111         n += scnprintf(&buf[n], PAGE_SIZE - n,
 112                       "num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
 113         n += scnprintf(&buf[n], PAGE_SIZE - n,
 114                       "num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
 115         n += scnprintf(&buf[n], PAGE_SIZE - n,
 116                       "ber_error_count = %d\n", p->ber_error_count);
 117         n += scnprintf(&buf[n], PAGE_SIZE - n,
 118                       "ber_bit_count = %d\n", p->ber_bit_count);
 119         n += scnprintf(&buf[n], PAGE_SIZE - n,
 120                       "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
 121         n += scnprintf(&buf[n], PAGE_SIZE - n,
 122                       "pre_ber = %d\n", p->pre_ber);
 123         n += scnprintf(&buf[n], PAGE_SIZE - n,
 124                       "cell_id = %d\n", p->cell_id);
 125         n += scnprintf(&buf[n], PAGE_SIZE - n,
 126                       "dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
 127         n += scnprintf(&buf[n], PAGE_SIZE - n,
 128                       "dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
 129         n += scnprintf(&buf[n], PAGE_SIZE - n,
 130                       "num_mpe_received = %d\n", p->num_mpe_received);
 131
 132         debug_data->stats_count = n;
 133         spin_unlock(&debug_data->lock);
 134         wake_up(&debug_data->stats_queue);
 135 }
 136
 137 static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
 138                              struct sms_isdbt_stats *p)
 139 {
 140         int i, n = 0;
 141         char *buf;
 142
 143         spin_lock(&debug_data->lock);
 144         if (debug_data->stats_count) {
 145                 spin_unlock(&debug_data->lock);
 146                 return;
 147         }
 148
 149         buf = debug_data->stats_data;
 150
 151         n += scnprintf(&buf[n], PAGE_SIZE - n,
 152                       "statistics_type = %d\t", p->statistics_type);
 153         n += scnprintf(&buf[n], PAGE_SIZE - n,
 154                       "full_size = %d\n", p->full_size);
 155
 156         n += scnprintf(&buf[n], PAGE_SIZE - n,
 157                       "is_rf_locked = %d\t\t", p->is_rf_locked);
 158         n += scnprintf(&buf[n], PAGE_SIZE - n,
 159                       "is_demod_locked = %d\t", p->is_demod_locked);
 160         n += scnprintf(&buf[n], PAGE_SIZE - n,
 161                       "is_external_lna_on = %d\n", p->is_external_lna_on);
 162         n += scnprintf(&buf[n], PAGE_SIZE - n,
 163                       "SNR = %d dB\t\t", p->SNR);
 164         n += scnprintf(&buf[n], PAGE_SIZE - n,
 165                       "RSSI = %d dBm\t\t", p->RSSI);
 166         n += scnprintf(&buf[n], PAGE_SIZE - n,
 167                       "in_band_pwr = %d dBm\n", p->in_band_pwr);
 168         n += scnprintf(&buf[n], PAGE_SIZE - n,
 169                       "carrier_offset = %d\t", p->carrier_offset);
 170         n += scnprintf(&buf[n], PAGE_SIZE - n,
 171                       "bandwidth = %d\t\t", p->bandwidth);
 172         n += scnprintf(&buf[n], PAGE_SIZE - n,
 173                       "frequency = %d Hz\n", p->frequency);
 174         n += scnprintf(&buf[n], PAGE_SIZE - n,
 175                       "transmission_mode = %d\t", p->transmission_mode);
 176         n += scnprintf(&buf[n], PAGE_SIZE - n,
 177                       "modem_state = %d\t\t", p->modem_state);
 178         n += scnprintf(&buf[n], PAGE_SIZE - n,
 179                       "guard_interval = %d\n", p->guard_interval);
 180         n += scnprintf(&buf[n], PAGE_SIZE - n,
 181                       "system_type = %d\t\t", p->system_type);
 182         n += scnprintf(&buf[n], PAGE_SIZE - n,
 183                       "partial_reception = %d\t", p->partial_reception);
 184         n += scnprintf(&buf[n], PAGE_SIZE - n,
 185                       "num_of_layers = %d\n", p->num_of_layers);
 186         n += scnprintf(&buf[n], PAGE_SIZE - n,
 187                       "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
 188
 189         for (i = 0; i < 3; i++) {
 190                 if (p->layer_info[i].number_of_segments < 1 ||
 191                     p->layer_info[i].number_of_segments > 13)
 192                         continue;
 193
 194                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
 195                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
 196                               p->layer_info[i].code_rate);
 197                 n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 198                               p->layer_info[i].constellation);
 199                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
 200                               p->layer_info[i].ber);
 201                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 202                               "\tber_error_count = %-5d\t",
 203                               p->layer_info[i].ber_error_count);
 204                 n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 205                               p->layer_info[i].ber_bit_count);
 206                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 207                               p->layer_info[i].pre_ber);
 208                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
 209                               p->layer_info[i].ts_per);
 210                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 211                               "\terror_ts_packets = %-5d\t",
 212                               p->layer_info[i].error_ts_packets);
 213                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 214                               "total_ts_packets = %-5d\t",
 215                               p->layer_info[i].total_ts_packets);
 216                 n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 217                               p->layer_info[i].ti_ldepth_i);
 218                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 219                               "\tnumber_of_segments = %d\t",
 220                               p->layer_info[i].number_of_segments);
 221                 n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 222                               p->layer_info[i].tmcc_errors);
 223         }
 224
 225         debug_data->stats_count = n;
 226         spin_unlock(&debug_data->lock);
 227         wake_up(&debug_data->stats_queue);
 228 }
 229
 230 static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
 231                                 struct sms_isdbt_stats_ex *p)
 232 {
 233         int i, n = 0;
 234         char *buf;
 235
 236         spin_lock(&debug_data->lock);
 237         if (debug_data->stats_count) {
 238                 spin_unlock(&debug_data->lock);
 239                 return;
 240         }
 241
 242         buf = debug_data->stats_data;
 243
 244         n += scnprintf(&buf[n], PAGE_SIZE - n,
 245                       "statistics_type = %d\t", p->statistics_type);
 246         n += scnprintf(&buf[n], PAGE_SIZE - n,
 247                       "full_size = %d\n", p->full_size);
 248
 249         n += scnprintf(&buf[n], PAGE_SIZE - n,
 250                       "is_rf_locked = %d\t\t", p->is_rf_locked);
 251         n += scnprintf(&buf[n], PAGE_SIZE - n,
 252                       "is_demod_locked = %d\t", p->is_demod_locked);
 253         n += scnprintf(&buf[n], PAGE_SIZE - n,
 254                       "is_external_lna_on = %d\n", p->is_external_lna_on);
 255         n += scnprintf(&buf[n], PAGE_SIZE - n,
 256                       "SNR = %d dB\t\t", p->SNR);
 257         n += scnprintf(&buf[n], PAGE_SIZE - n,
 258                       "RSSI = %d dBm\t\t", p->RSSI);
 259         n += scnprintf(&buf[n], PAGE_SIZE - n,
 260                       "in_band_pwr = %d dBm\n", p->in_band_pwr);
 261         n += scnprintf(&buf[n], PAGE_SIZE - n,
 262                       "carrier_offset = %d\t", p->carrier_offset);
 263         n += scnprintf(&buf[n], PAGE_SIZE - n,
 264                       "bandwidth = %d\t\t", p->bandwidth);
 265         n += scnprintf(&buf[n], PAGE_SIZE - n,
 266                       "frequency = %d Hz\n", p->frequency);
 267         n += scnprintf(&buf[n], PAGE_SIZE - n,
 268                       "transmission_mode = %d\t", p->transmission_mode);
 269         n += scnprintf(&buf[n], PAGE_SIZE - n,
 270                       "modem_state = %d\t\t", p->modem_state);
 271         n += scnprintf(&buf[n], PAGE_SIZE - n,
 272                       "guard_interval = %d\n", p->guard_interval);
 273         n += scnprintf(&buf[n], PAGE_SIZE - n,
 274                       "system_type = %d\t\t", p->system_type);
 275         n += scnprintf(&buf[n], PAGE_SIZE - n,
 276                       "partial_reception = %d\t", p->partial_reception);
 277         n += scnprintf(&buf[n], PAGE_SIZE - n,
 278                       "num_of_layers = %d\n", p->num_of_layers);
 279         n += scnprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
 280                       p->segment_number);
 281         n += scnprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
 282                       p->tune_bw);
 283
 284         for (i = 0; i < 3; i++) {
 285                 if (p->layer_info[i].number_of_segments < 1 ||
 286                     p->layer_info[i].number_of_segments > 13)
 287                         continue;
 288
 289                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
 290                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
 291                               p->layer_info[i].code_rate);
 292                 n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 293                               p->layer_info[i].constellation);
 294                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
 295                               p->layer_info[i].ber);
 296                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 297                               "\tber_error_count = %-5d\t",
 298                               p->layer_info[i].ber_error_count);
 299                 n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 300                               p->layer_info[i].ber_bit_count);
 301                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 302                               p->layer_info[i].pre_ber);
 303                 n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
 304                               p->layer_info[i].ts_per);
 305                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 306                               "\terror_ts_packets = %-5d\t",
 307                               p->layer_info[i].error_ts_packets);
 308                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 309                               "total_ts_packets = %-5d\t",
 310                               p->layer_info[i].total_ts_packets);
 311                 n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 312                               p->layer_info[i].ti_ldepth_i);
 313                 n += scnprintf(&buf[n], PAGE_SIZE - n,
 314                               "\tnumber_of_segments = %d\t",
 315                               p->layer_info[i].number_of_segments);
 316                 n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 317                               p->layer_info[i].tmcc_errors);
 318         }
 319
 320
 321         debug_data->stats_count = n;
 322         spin_unlock(&debug_data->lock);
 323
 324         wake_up(&debug_data->stats_queue);
 325 }
 326
 327 static int smsdvb_stats_open(struct inode *inode, struct file *file)
 328 {
 329         struct smsdvb_client_t *client = inode->i_private;
 330         struct smsdvb_debugfs *debug_data = client->debug_data;
 331
 332         kref_get(&debug_data->refcount);
 333
 334         spin_lock(&debug_data->lock);
 335         debug_data->stats_count = 0;
 336         debug_data->stats_was_read = false;
 337         spin_unlock(&debug_data->lock);
 338
 339         file->private_data = debug_data;
 340
 341         return 0;
 342 }
 343
 344 static void smsdvb_debugfs_data_release(struct kref *ref)
 345 {
 346         struct smsdvb_debugfs *debug_data;
 347
 348         debug_data = container_of(ref, struct smsdvb_debugfs, refcount);
 349         kfree(debug_data);
 350 }
 351
 352 static int smsdvb_stats_wait_read(struct smsdvb_debugfs *debug_data)
 353 {
 354         int rc = 1;
 355
 356         spin_lock(&debug_data->lock);
 357
 358         if (debug_data->stats_was_read)
 359                 goto exit;
 360
 361         rc = debug_data->stats_count;
 362
 363 exit:
 364         spin_unlock(&debug_data->lock);
 365         return rc;
 366 }
 367
 368 static __poll_t smsdvb_stats_poll(struct file *file, poll_table *wait)
 369 {
 370         struct smsdvb_debugfs *debug_data = file->private_data;
 371         int rc;
 372
 373         kref_get(&debug_data->refcount);
 374
 375         poll_wait(file, &debug_data->stats_queue, wait);
 376
 377         rc = smsdvb_stats_wait_read(debug_data);
 378         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 379
 380         return rc > 0 ? EPOLLIN | EPOLLRDNORM : 0;
 381 }
 382
 383 static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
 384                                       size_t nbytes, loff_t *ppos)
 385 {
 386         int rc = 0, len;
 387         struct smsdvb_debugfs *debug_data = file->private_data;
 388
 389         kref_get(&debug_data->refcount);
 390
 391         if (file->f_flags & O_NONBLOCK) {
 392                 rc = smsdvb_stats_wait_read(debug_data);
 393                 if (!rc) {
 394                         rc = -EWOULDBLOCK;
 395                         goto ret;
 396                 }
 397         } else {
 398                 rc = wait_event_interruptible(debug_data->stats_queue,
 399                                       smsdvb_stats_wait_read(debug_data));
 400                 if (rc < 0)
 401                         goto ret;
 402         }
 403
 404         if (debug_data->stats_was_read) {
 405                 rc = 0; /* EOF */
 406                 goto ret;
 407         }
 408
 409         len = debug_data->stats_count - *ppos;
 410         if (len >= 0)
 411                 rc = simple_read_from_buffer(user_buf, nbytes, ppos,
 412                                              debug_data->stats_data, len);
 413         else
 414                 rc = 0;
 415
 416         if (*ppos >= debug_data->stats_count) {
 417                 spin_lock(&debug_data->lock);
 418                 debug_data->stats_was_read = true;
 419                 spin_unlock(&debug_data->lock);
 420         }
 421 ret:
 422         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 423         return rc;
 424 }
 425
 426 static int smsdvb_stats_release(struct inode *inode, struct file *file)
 427 {
 428         struct smsdvb_debugfs *debug_data = file->private_data;
 429
 430         spin_lock(&debug_data->lock);
 431         debug_data->stats_was_read = true;      /* return EOF to read() */
 432         spin_unlock(&debug_data->lock);
 433         wake_up_interruptible_sync(&debug_data->stats_queue);
 434
 435         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 436         file->private_data = NULL;
 437
 438         return 0;
 439 }
 440
 441 static const struct file_operations debugfs_stats_ops = {
 442         .open = smsdvb_stats_open,
 443         .poll = smsdvb_stats_poll,
 444         .read = smsdvb_stats_read,
 445         .release = smsdvb_stats_release,
 446         .llseek = generic_file_llseek,
 447 };
 448
 449 /*
 450  * Functions used by smsdvb, in order to create the interfaces
 451  */
 452
 453 int smsdvb_debugfs_create(struct smsdvb_client_t *client)
 454 {
 455         struct smscore_device_t *coredev = client->coredev;
 456         struct dentry *d;
 457         struct smsdvb_debugfs *debug_data;
 458
 459         if (!smsdvb_debugfs_usb_root || !coredev->is_usb_device)
 460                 return -ENODEV;
 461
 462         client->debugfs = debugfs_create_dir(coredev->devpath,
 463                                              smsdvb_debugfs_usb_root);
 464         if (IS_ERR_OR_NULL(client->debugfs)) {
 465                 pr_info("Unable to create debugfs %s directory.\n",
 466                         coredev->devpath);
 467                 return -ENODEV;
 468         }
 469
 470         d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
 471                                 client, &debugfs_stats_ops);
 472         if (!d) {
 473                 debugfs_remove(client->debugfs);
 474                 return -ENOMEM;
 475         }
 476
 477         debug_data = kzalloc(sizeof(*client->debug_data), GFP_KERNEL);
 478         if (!debug_data)
 479                 return -ENOMEM;
 480
 481         client->debug_data        = debug_data;
 482         client->prt_dvb_stats     = smsdvb_print_dvb_stats;
 483         client->prt_isdb_stats    = smsdvb_print_isdb_stats;
 484         client->prt_isdb_stats_ex = smsdvb_print_isdb_stats_ex;
 485
 486         init_waitqueue_head(&debug_data->stats_queue);
 487         spin_lock_init(&debug_data->lock);
 488         kref_init(&debug_data->refcount);
 489
 490         return 0;
 491 }
 492
 493 void smsdvb_debugfs_release(struct smsdvb_client_t *client)
 494 {
 495         if (!client->debugfs)
 496                 return;
 497
 498         client->prt_dvb_stats     = NULL;
 499         client->prt_isdb_stats    = NULL;
 500         client->prt_isdb_stats_ex = NULL;
 501
 502         debugfs_remove_recursive(client->debugfs);
 503         kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
 504
 505         client->debug_data = NULL;
 506         client->debugfs = NULL;
 507 }
 508
 509 void smsdvb_debugfs_register(void)
 510 {
 511         struct dentry *d;
 512
 513         /*
 514          * FIXME: This was written to debug Siano USB devices. So, it creates
 515          * the debugfs node under <debugfs>/usb.
 516          * A similar logic would be needed for Siano sdio devices, but, in that
 517          * case, usb_debug_root is not a good choice.
 518          *
 519          * Perhaps the right fix here would be to create another sysfs root
 520          * node for sdio-based boards, but this may need some logic at sdio
 521          * subsystem.
 522          */
 523         d = debugfs_create_dir("smsdvb", usb_debug_root);
 524         if (IS_ERR_OR_NULL(d)) {
 525                 pr_err("Couldn't create sysfs node for smsdvb\n");
 526                 return;
 527         }
 528         smsdvb_debugfs_usb_root = d;
 529 }
 530
 531 void smsdvb_debugfs_unregister(void)
 532 {
 533         if (!smsdvb_debugfs_usb_root)
 534                 return;
 535         debugfs_remove_recursive(smsdvb_debugfs_usb_root);
 536         smsdvb_debugfs_usb_root = NULL;
 537 }