LXR linux/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
  38static struct dentry *smsdvb_debugfs_usb_root;
  39
  40struct 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
  51static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
  52                            struct sms_stats *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
 154static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
 155                             struct sms_isdbt_stats *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->layer_info[i].number_of_segments < 1 ||
 208                    p->layer_info[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->layer_info[i].code_rate);
 214                n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 215                              p->layer_info[i].constellation);
 216                n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
 217                              p->layer_info[i].ber);
 218                n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
 219                              p->layer_info[i].ber_error_count);
 220                n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 221                              p->layer_info[i].ber_bit_count);
 222                n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 223                              p->layer_info[i].pre_ber);
 224                n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
 225                              p->layer_info[i].ts_per);
 226                n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
 227                              p->layer_info[i].error_ts_packets);
 228                n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
 229                              p->layer_info[i].total_ts_packets);
 230                n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 231                              p->layer_info[i].ti_ldepth_i);
 232                n += snprintf(&buf[n], PAGE_SIZE - n,
 233                              "\tnumber_of_segments = %d\t",
 234                              p->layer_info[i].number_of_segments);
 235                n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 236                              p->layer_info[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
 244static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
 245                                struct sms_isdbt_stats_ex *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->layer_info[i].number_of_segments < 1 ||
 300                    p->layer_info[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->layer_info[i].code_rate);
 306                n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
 307                              p->layer_info[i].constellation);
 308                n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
 309                              p->layer_info[i].ber);
 310                n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
 311                              p->layer_info[i].ber_error_count);
 312                n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
 313                              p->layer_info[i].ber_bit_count);
 314                n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
 315                              p->layer_info[i].pre_ber);
 316                n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
 317                              p->layer_info[i].ts_per);
 318                n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
 319                              p->layer_info[i].error_ts_packets);
 320                n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
 321                              p->layer_info[i].total_ts_packets);
 322                n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
 323                              p->layer_info[i].ti_ldepth_i);
 324                n += snprintf(&buf[n], PAGE_SIZE - n,
 325                              "\tnumber_of_segments = %d\t",
 326                              p->layer_info[i].number_of_segments);
 327                n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
 328                              p->layer_info[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
 338static 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
 355static 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
 363static 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
 374exit:
 375        spin_unlock(&debug_data->lock);
 376        return rc;
 377}
 378
 379static 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
 397static 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        }
 435ret:
 436        kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
 437        return rc;
 438}
 439
 440static 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
 455static 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
 467int 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
 507void smsdvb_debugfs_release(struct smsdvb_client_t *client)
 508{
 509        if (!client->debugfs)
 510                return;
 511
 512        client->prt_dvb_stats     = NULL;
 513        client->prt_isdb_stats    = NULL;
 514        client->prt_isdb_stats_ex = NULL;
 515
 516        debugfs_remove_recursive(client->debugfs);
 517        kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
 518
 519        client->debug_data = NULL;
 520        client->debugfs = NULL;
 521}
 522
 523int smsdvb_debugfs_register(void)
 524{
 525        struct dentry *d;
 526
 527        /*
 528         * FIXME: This was written to debug Siano USB devices. So, it creates
 529         * the debugfs node under <debugfs>/usb.
 530         * A similar logic would be needed for Siano sdio devices, but, in that
 531         * case, usb_debug_root is not a good choice.
 532         *
 533         * Perhaps the right fix here would be to create another sysfs root
 534         * node for sdio-based boards, but this may need some logic at sdio
 535         * subsystem.
 536         */
 537        d = debugfs_create_dir("smsdvb", usb_debug_root);
 538        if (IS_ERR_OR_NULL(d)) {
 539                sms_err("Couldn't create sysfs node for smsdvb");
 540                return PTR_ERR(d);
 541        } else {
 542                smsdvb_debugfs_usb_root = d;
 543        }
 544        return 0;
 545}
 546
 547void smsdvb_debugfs_unregister(void)
 548{
 549        debugfs_remove_recursive(smsdvb_debugfs_usb_root);
 550        smsdvb_debugfs_usb_root = NULL;
 551}
 552