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#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