Pileus Git - ~andy/linux/blob - drivers/media/common/siano/smsdvb-debugfs.c

   1 /***********************************************************************
   2  *
   3  * Copyright(c) 2013 Mauro Carvalho Chehab <mchehab@redhat.com>
   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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  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 "smscoreapi.h"
  35
  36 #include "smsdvb.h"
  37
  38 static struct dentry *smsdvb_debugfs_usb_root;
  39
  40 struct smsdvb_debugfs {
  41         struct kref             refcount;
  42         spinlock_t              lock;
  43
  44         char                    stats_data[PAGE_SIZE];
  45         unsigned                stats_count;
  46         bool                    stats_was_read;
  47
  48         wait_queue_head_t       stats_queue;
  49 };
  50
  51 void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
  52                             struct SMSHOSTLIB_STATISTICS_ST *p)
  53 {
  54         int n = 0;
  55         char *buf;
  56
  57         spin_lock(&debug_data->lock);
  58         if (debug_data->stats_count) {
  59                 spin_unlock(&debug_data->lock);
  60                 return;
  61         }
  62
  63         buf = debug_data->stats_data;
  64
  65         n += snprintf(&buf[n], PAGE_SIZE - n,
  66                       "is_rf_locked = %d\n", p->is_rf_locked);
  67         n += snprintf(&buf[n], PAGE_SIZE - n,
  68                       "is_demod_locked = %d\n", p->is_demod_locked);
  69         n += snprintf(&buf[n], PAGE_SIZE - n,
  70                       "is_external_lna_on = %d\n", p->is_external_lna_on);
  71         n += snprintf(&buf[n], PAGE_SIZE - n,
  72                       "SNR = %d\n", p->SNR);
  73         n += snprintf(&buf[n], PAGE_SIZE - n,
  74                       "BER = %d\n", p->BER);
  75         n += snprintf(&buf[n], PAGE_SIZE - n,
  76                       "FIB_CRC = %d\n", p->FIB_CRC);
  77         n += snprintf(&buf[n], PAGE_SIZE - n,
  78                       "TS_PER = %d\n", p->TS_PER);
  79         n += snprintf(&buf[n], PAGE_SIZE - n,
  80                       "MFER = %d\n", p->MFER);
  81         n += snprintf(&buf[n], PAGE_SIZE - n,
  82                       "RSSI = %d\n", p->RSSI);
  83         n += snprintf(&buf[n], PAGE_SIZE - n,
  84                       "in_band_pwr = %d\n", p->in_band_pwr);
  85         n += snprintf(&buf[n], PAGE_SIZE - n,
  86                       "carrier_offset = %d\n", p->carrier_offset);
  87         n += snprintf(&buf[n], PAGE_SIZE - n,
  88                       "modem_state = %d\n", p->modem_state);
  89         n += snprintf(&buf[n], PAGE_SIZE - n,
  90                       "frequency = %d\n", p->frequency);
  91         n += snprintf(&buf[n], PAGE_SIZE - n,
  92                       "bandwidth = %d\n", p->bandwidth);
  93         n += snprintf(&buf[n], PAGE_SIZE - n,
  94                       "transmission_mode = %d\n", p->transmission_mode);
  95         n += snprintf(&buf[n], PAGE_SIZE - n,
  96                       "modem_state = %d\n", p->modem_state);
  97         n += snprintf(&buf[n], PAGE_SIZE - n,
  98                       "guard_interval = %d\n", p->guard_interval);
  99         n += snprintf(&buf[n], PAGE_SIZE - n,
 100                       "code_rate = %d\n", p->code_rate);
 101         n += snprintf(&buf[n], PAGE_SIZE - n,
 102                       "lp_code_rate = %d\n", p->lp_code_rate);
 103         n += snprintf(&buf[n], PAGE_SIZE - n,
 104                       "hierarchy = %d\n", p->hierarchy);
 105         n += snprintf(&buf[n], PAGE_SIZE - n,
 106                       "constellation = %d\n", p->constellation);
 107         n += snprintf(&buf[n], PAGE_SIZE - n,
 108                       "burst_size = %d\n", p->burst_size);
 109         n += snprintf(&buf[n], PAGE_SIZE - n,
 110                       "burst_duration = %d\n", p->burst_duration);
 111         n += snprintf(&buf[n], PAGE_SIZE - n,
 112                       "burst_cycle_time = %d\n", p->burst_cycle_time);
 113         n += snprintf(&buf[n], PAGE_SIZE - n,
 114                       "calc_burst_cycle_time = %d\n",
 115                       p->calc_burst_cycle_time);
 116         n += snprintf(&buf[n], PAGE_SIZE - n,
 117                       "num_of_rows = %d\n", p->num_of_rows);
 118         n += snprintf(&buf[n], PAGE_SIZE - n,
 119                       "num_of_padd_cols = %d\n", p->num_of_padd_cols);
 120         n += snprintf(&buf[n], PAGE_SIZE - n,
 121                       "num_of_punct_cols = %d\n", p->num_of_punct_cols);
 122         n += snprintf(&buf[n], PAGE_SIZE - n,
 123                       "error_ts_packets = %d\n", p->error_ts_packets);
 124         n += snprintf(&buf[n], PAGE_SIZE - n,
 125                       "total_ts_packets = %d\n", p->total_ts_packets);
 126         n += snprintf(&buf[n], PAGE_SIZE - n,
 127                       "num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
 128         n += snprintf(&buf[n], PAGE_SIZE - n,
 129                       "num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
 130         n += snprintf(&buf[n], PAGE_SIZE - n,
 131                       "num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
 132         n += snprintf(&buf[n], PAGE_SIZE - n,
 133                       "ber_error_count = %d\n", p->ber_error_count);
 134         n += snprintf(&buf[n], PAGE_SIZE - n,
 135                       "ber_bit_count = %d\n", p->ber_bit_count);
 136         n += snprintf(&buf[n], PAGE_SIZE - n,
 137                       "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
 138         n += snprintf(&buf[n], PAGE_SIZE - n,
 139                       "pre_ber = %d\n", p->pre_ber);
 140         n += snprintf(&buf[n], PAGE_SIZE - n,
 141                       "cell_id = %d\n", p->cell_id);
 142         n += snprintf(&buf[n], PAGE_SIZE - n,
 143                       "dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
 144         n += snprintf(&buf[n], PAGE_SIZE - n,
 145                       "dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
 146         n += snprintf(&buf[n], PAGE_SIZE - n,
 147                       "num_mpe_received = %d\n", p->num_mpe_received);
 148
 149         debug_data->stats_count = n;
 150         spin_unlock(&debug_data->lock);
 151         wake_up(&debug_data->stats_queue);
 152 }
 153
 154 void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
 155                              struct SMSHOSTLIB_STATISTICS_ISDBT_ST *p)
 156 {
 157         int i, n = 0;
 158         char *buf;
 159
 160         spin_lock(&debug_data->lock);
 161         if (debug_data->stats_count) {
 162                 spin_unlock(&debug_data->lock);
 163                 return;
 164         }
 165
 166         buf = debug_data->stats_data;
 167
 168         n += snprintf(&buf[n], PAGE_SIZE - n,
 169                       "statistics_type = %d\t", p->statistics_type);
 170         n += snprintf(&buf[n], PAGE_SIZE - n,
 171                       "full_size = %d\n", p->full_size);
 172
 173         n += snprintf(&buf[n], PAGE_SIZE - n,
 174                       "is_rf_locked = %d\t\t", p->is_rf_locked);
 175         n += snprintf(&buf[n], PAGE_SIZE - n,
 176                       "is_demod_locked = %d\t", p->is_demod_locked);
 177         n += snprintf(&buf[n], PAGE_SIZE - n,
 178                       "is_external_lna_on = %d\n", p->is_external_lna_on);
 179         n += snprintf(&buf[n], PAGE_SIZE - n,
 180                       "SNR = %d dB\t\t", p->SNR);
 181         n += snprintf(&buf[n], PAGE_SIZE - n,
 182                       "RSSI = %d dBm\t\t", p->RSSI);
 183         n += snprintf(&buf[n], PAGE_SIZE - n,
 184                       "in_band_pwr = %d dBm\n", p->in_band_pwr);
 185         n += snprintf(&buf[n], PAGE_SIZE - n,
 186                       "carrier_offset = %d\t", p->carrier_offset);
 187         n += snprintf(&buf[n], PAGE_SIZE - n,
 188                       "bandwidth = %d\t\t", p->bandwidth);
 189         n += snprintf(&buf[n], PAGE_SIZE - n,
 190                       "frequency = %d Hz\n", p->frequency);
 191         n += snprintf(&buf[n], PAGE_SIZE - n,
 192                       "transmission_mode = %d\t", p->transmission_mode);
 193         n += snprintf(&buf[n], PAGE_SIZE - n,
 194                       "modem_state = %d\t\t", p->modem_state);
 195         n += snprintf(&buf[n], PAGE_SIZE - n,
 196                       "guard_interval = %d\n", p->guard_interval);
 197         n += snprintf(&buf[n], PAGE_SIZE - n,
 198                       "system_type = %d\t\t", p->system_type);
 199         n += snprintf(&buf[n], PAGE_SIZE - n,
 200                       "partial_reception = %d\t", p->partial_reception);
 201         n += snprintf(&buf[n], PAGE_SIZE - n,
 202                       "num_of_layers = %d\n", p->num_of_layers);
 203         n += snprintf(&buf[n], PAGE_SIZE - n,
 204                       "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
 205
 206         for (i = 0; i < 3; i++) {
 207                 if (p->LayerInfo[i].number_of_segments < 1 ||
 208                     p->LayerInfo[i].number_of_segments > 13)
 209                         continue;
 210
 211                 n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
 212                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
 213                               p->LayerInfo[i].code_rate);
 214                 n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 215                               p->LayerInfo[i].constellation);
 216                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tBER = %-5d\t",
 217                               p->LayerInfo[i].BER);
 218                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
 219                               p->LayerInfo[i].ber_error_count);
 220                 n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 221                               p->LayerInfo[i].ber_bit_count);
 222                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 223                               p->LayerInfo[i].pre_ber);
 224                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tTS_PER = %-5d\n",
 225                               p->LayerInfo[i].TS_PER);
 226                 n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
 227                               p->LayerInfo[i].error_ts_packets);
 228                 n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
 229                               p->LayerInfo[i].total_ts_packets);
 230                 n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 231                               p->LayerInfo[i].ti_ldepth_i);
 232                 n += snprintf(&buf[n], PAGE_SIZE - n,
 233                               "\tnumber_of_segments = %d\t",
 234                               p->LayerInfo[i].number_of_segments);
 235                 n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 236                               p->LayerInfo[i].tmcc_errors);
 237         }
 238
 239         debug_data->stats_count = n;
 240         spin_unlock(&debug_data->lock);
 241         wake_up(&debug_data->stats_queue);
 242 }
 243
 244 void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
 245                                 struct SMSHOSTLIB_STATISTICS_ISDBT_EX_ST *p)
 246 {
 247         int i, n = 0;
 248         char *buf;
 249
 250         spin_lock(&debug_data->lock);
 251         if (debug_data->stats_count) {
 252                 spin_unlock(&debug_data->lock);
 253                 return;
 254         }
 255
 256         buf = debug_data->stats_data;
 257
 258         n += snprintf(&buf[n], PAGE_SIZE - n,
 259                       "statistics_type = %d\t", p->statistics_type);
 260         n += snprintf(&buf[n], PAGE_SIZE - n,
 261                       "full_size = %d\n", p->full_size);
 262
 263         n += snprintf(&buf[n], PAGE_SIZE - n,
 264                       "is_rf_locked = %d\t\t", p->is_rf_locked);
 265         n += snprintf(&buf[n], PAGE_SIZE - n,
 266                       "is_demod_locked = %d\t", p->is_demod_locked);
 267         n += snprintf(&buf[n], PAGE_SIZE - n,
 268                       "is_external_lna_on = %d\n", p->is_external_lna_on);
 269         n += snprintf(&buf[n], PAGE_SIZE - n,
 270                       "SNR = %d dB\t\t", p->SNR);
 271         n += snprintf(&buf[n], PAGE_SIZE - n,
 272                       "RSSI = %d dBm\t\t", p->RSSI);
 273         n += snprintf(&buf[n], PAGE_SIZE - n,
 274                       "in_band_pwr = %d dBm\n", p->in_band_pwr);
 275         n += snprintf(&buf[n], PAGE_SIZE - n,
 276                       "carrier_offset = %d\t", p->carrier_offset);
 277         n += snprintf(&buf[n], PAGE_SIZE - n,
 278                       "bandwidth = %d\t\t", p->bandwidth);
 279         n += snprintf(&buf[n], PAGE_SIZE - n,
 280                       "frequency = %d Hz\n", p->frequency);
 281         n += snprintf(&buf[n], PAGE_SIZE - n,
 282                       "transmission_mode = %d\t", p->transmission_mode);
 283         n += snprintf(&buf[n], PAGE_SIZE - n,
 284                       "modem_state = %d\t\t", p->modem_state);
 285         n += snprintf(&buf[n], PAGE_SIZE - n,
 286                       "guard_interval = %d\n", p->guard_interval);
 287         n += snprintf(&buf[n], PAGE_SIZE - n,
 288                       "system_type = %d\t\t", p->system_type);
 289         n += snprintf(&buf[n], PAGE_SIZE - n,
 290                       "partial_reception = %d\t", p->partial_reception);
 291         n += snprintf(&buf[n], PAGE_SIZE - n,
 292                       "num_of_layers = %d\n", p->num_of_layers);
 293         n += snprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
 294                       p->segment_number);
 295         n += snprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
 296                       p->tune_bw);
 297
 298         for (i = 0; i < 3; i++) {
 299                 if (p->LayerInfo[i].number_of_segments < 1 ||
 300                     p->LayerInfo[i].number_of_segments > 13)
 301                         continue;
 302
 303                 n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
 304                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
 305                               p->LayerInfo[i].code_rate);
 306                 n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 307                               p->LayerInfo[i].constellation);
 308                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tBER = %-5d\t",
 309                               p->LayerInfo[i].BER);
 310                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
 311                               p->LayerInfo[i].ber_error_count);
 312                 n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 313                               p->LayerInfo[i].ber_bit_count);
 314                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 315                               p->LayerInfo[i].pre_ber);
 316                 n += snprintf(&buf[n], PAGE_SIZE - n, "\tTS_PER = %-5d\n",
 317                               p->LayerInfo[i].TS_PER);
 318                 n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
 319                               p->LayerInfo[i].error_ts_packets);
 320                 n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
 321                               p->LayerInfo[i].total_ts_packets);
 322                 n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 323                               p->LayerInfo[i].ti_ldepth_i);
 324                 n += snprintf(&buf[n], PAGE_SIZE - n,
 325                               "\tnumber_of_segments = %d\t",
 326                               p->LayerInfo[i].number_of_segments);
 327                 n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 328                               p->LayerInfo[i].tmcc_errors);
 329         }
 330
 331
 332         debug_data->stats_count = n;
 333         spin_unlock(&debug_data->lock);
 334
 335         wake_up(&debug_data->stats_queue);
 336 }
 337
 338 static int smsdvb_stats_open(struct inode *inode, struct file *file)
 339 {
 340         struct smsdvb_client_t *client = inode->i_private;
 341         struct smsdvb_debugfs *debug_data = client->debug_data;
 342
 343         kref_get(&debug_data->refcount);
 344
 345         spin_lock(&debug_data->lock);
 346         debug_data->stats_count = 0;
 347         debug_data->stats_was_read = false;
 348         spin_unlock(&debug_data->lock);
 349
 350         file->private_data = debug_data;
 351
 352         return 0;
 353 }
 354
 355 static void smsdvb_debugfs_data_release(struct kref *ref)
 356 {
 357         struct smsdvb_debugfs *debug_data;
 358
 359         debug_data = container_of(ref, struct smsdvb_debugfs, refcount);
 360         kfree(debug_data);
 361 }
 362
 363 static int smsdvb_stats_wait_read(struct smsdvb_debugfs *debug_data)
 364 {
 365         int rc = 1;
 366
 367         spin_lock(&debug_data->lock);
 368
 369         if (debug_data->stats_was_read)
 370                 goto exit;
 371
 372         rc = debug_data->stats_count;
 373
 374 exit:
 375         spin_unlock(&debug_data->lock);
 376         return rc;
 377 }
 378
 379 static unsigned int smsdvb_stats_poll(struct file *file, poll_table *wait)
 380 {
 381         struct smsdvb_debugfs *debug_data = file->private_data;
 382         int rc;
 383
 384         kref_get(&debug_data->refcount);
 385
 386         poll_wait(file, &debug_data->stats_queue, wait);
 387
 388         rc = smsdvb_stats_wait_read(debug_data);
 389         if (rc > 0)
 390                 rc = POLLIN | POLLRDNORM;
 391
 392         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 393
 394         return rc;
 395 }
 396
 397 static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
 398                                       size_t nbytes, loff_t *ppos)
 399 {
 400         int rc = 0, len;
 401         struct smsdvb_debugfs *debug_data = file->private_data;
 402
 403         kref_get(&debug_data->refcount);
 404
 405         if (file->f_flags & O_NONBLOCK) {
 406                 rc = smsdvb_stats_wait_read(debug_data);
 407                 if (!rc) {
 408                         rc = -EWOULDBLOCK;
 409                         goto ret;
 410                 }
 411         } else {
 412                 rc = wait_event_interruptible(debug_data->stats_queue,
 413                                       smsdvb_stats_wait_read(debug_data));
 414                 if (rc < 0)
 415                         goto ret;
 416         }
 417
 418         if (debug_data->stats_was_read) {
 419                 rc = 0; /* EOF */
 420                 goto ret;
 421         }
 422
 423         len = debug_data->stats_count - *ppos;
 424         if (len >= 0)
 425                 rc = simple_read_from_buffer(user_buf, nbytes, ppos,
 426                                              debug_data->stats_data, len);
 427         else
 428                 rc = 0;
 429
 430         if (*ppos >= debug_data->stats_count) {
 431                 spin_lock(&debug_data->lock);
 432                 debug_data->stats_was_read = true;
 433                 spin_unlock(&debug_data->lock);
 434         }
 435 ret:
 436         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 437         return rc;
 438 }
 439
 440 static int smsdvb_stats_release(struct inode *inode, struct file *file)
 441 {
 442         struct smsdvb_debugfs *debug_data = file->private_data;
 443
 444         spin_lock(&debug_data->lock);
 445         debug_data->stats_was_read = true;      /* return EOF to read() */
 446         spin_unlock(&debug_data->lock);
 447         wake_up_interruptible_sync(&debug_data->stats_queue);
 448
 449         kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 450         file->private_data = NULL;
 451
 452         return 0;
 453 }
 454
 455 static const struct file_operations debugfs_stats_ops = {
 456         .open = smsdvb_stats_open,
 457         .poll = smsdvb_stats_poll,
 458         .read = smsdvb_stats_read,
 459         .release = smsdvb_stats_release,
 460         .llseek = generic_file_llseek,
 461 };
 462
 463 /*
 464  * Functions used by smsdvb, in order to create the interfaces
 465  */
 466
 467 int smsdvb_debugfs_create(struct smsdvb_client_t *client)
 468 {
 469         struct smscore_device_t *coredev = client->coredev;
 470         struct dentry *d;
 471         struct smsdvb_debugfs *debug_data;
 472
 473         if (!smsdvb_debugfs_usb_root || !coredev->is_usb_device)
 474                 return -ENODEV;
 475
 476         client->debugfs = debugfs_create_dir(coredev->devpath,
 477                                              smsdvb_debugfs_usb_root);
 478         if (IS_ERR_OR_NULL(client->debugfs)) {
 479                 pr_info("Unable to create debugfs %s directory.\n",
 480                         coredev->devpath);
 481                 return -ENODEV;
 482         }
 483
 484         d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
 485                                 client, &debugfs_stats_ops);
 486         if (!d) {
 487                 debugfs_remove(client->debugfs);
 488                 return -ENOMEM;
 489         }
 490
 491         debug_data = kzalloc(sizeof(*client->debug_data), GFP_KERNEL);
 492         if (!debug_data)
 493                 return -ENOMEM;
 494
 495         client->debug_data        = debug_data;
 496         client->prt_dvb_stats     = smsdvb_print_dvb_stats;
 497         client->prt_isdb_stats    = smsdvb_print_isdb_stats;
 498         client->prt_isdb_stats_ex = smsdvb_print_isdb_stats_ex;
 499
 500         init_waitqueue_head(&debug_data->stats_queue);
 501         spin_lock_init(&debug_data->lock);
 502         kref_init(&debug_data->refcount);
 503
 504         return 0;
 505 }
 506
 507 void smsdvb_debugfs_release(struct smsdvb_client_t *client)
 508 {
 509         if (!client->debugfs)
 510                 return;
 511
 512 printk("%s\n", __func__);
 513
 514         client->prt_dvb_stats     = NULL;
 515         client->prt_isdb_stats    = NULL;
 516         client->prt_isdb_stats_ex = NULL;
 517
 518         debugfs_remove_recursive(client->debugfs);
 519         kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
 520
 521         client->debug_data = NULL;
 522         client->debugfs = NULL;
 523 }
 524
 525 int smsdvb_debugfs_register(void)
 526 {
 527         struct dentry *d;
 528
 529         /*
 530          * FIXME: This was written to debug Siano USB devices. So, it creates
 531          * the debugfs node under <debugfs>/usb.
 532          * A similar logic would be needed for Siano sdio devices, but, in that
 533          * case, usb_debug_root is not a good choice.
 534          *
 535          * Perhaps the right fix here would be to create another sysfs root
 536          * node for sdio-based boards, but this may need some logic at sdio
 537          * subsystem.
 538          */
 539         d = debugfs_create_dir("smsdvb", usb_debug_root);
 540         if (IS_ERR_OR_NULL(d)) {
 541                 sms_err("Couldn't create sysfs node for smsdvb");
 542                 return PTR_ERR(d);
 543         } else {
 544                 smsdvb_debugfs_usb_root = d;
 545         }
 546         return 0;
 547 }
 548
 549 void smsdvb_debugfs_unregister(void)
 550 {
 551         if (smsdvb_debugfs_usb_root)
 552                 debugfs_remove_recursive(smsdvb_debugfs_usb_root);
 553         smsdvb_debugfs_usb_root = NULL;
 554 }