1 #include <linux/dcache.h> 2 #include <linux/debugfs.h> 3 #include <linux/delay.h> 4 #include <linux/hardirq.h> 5 #include <linux/mm.h> 6 #include <linux/string.h> 7 #include <linux/slab.h> 8 #include <linux/export.h> 9 10 #include "decl.h" 11 #include "cmd.h" 12 #include "debugfs.h" 13 14 static struct dentry *lbs_dir; 15 static char *szStates[] = { 16 "Connected", 17 "Disconnected" 18 }; 19 20 #ifdef PROC_DEBUG 21 static void lbs_debug_init(struct lbs_private *priv); 22 #endif 23 24 static ssize_t write_file_dummy(struct file *file, const char __user *buf, 25 size_t count, loff_t *ppos) 26 { 27 return -EINVAL; 28 } 29 30 static const size_t len = PAGE_SIZE; 31 32 static ssize_t lbs_dev_info(struct file *file, char __user *userbuf, 33 size_t count, loff_t *ppos) 34 { 35 struct lbs_private *priv = file->private_data; 36 size_t pos = 0; 37 unsigned long addr = get_zeroed_page(GFP_KERNEL); 38 char *buf = (char *)addr; 39 ssize_t res; 40 if (!buf) 41 return -ENOMEM; 42 43 pos += snprintf(buf+pos, len-pos, "state = %s\n", 44 szStates[priv->connect_status]); 45 pos += snprintf(buf+pos, len-pos, "region_code = %02x\n", 46 (u32) priv->regioncode); 47 48 res = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 49 50 free_page(addr); 51 return res; 52 } 53 54 static ssize_t lbs_sleepparams_write(struct file *file, 55 const char __user *user_buf, size_t count, 56 loff_t *ppos) 57 { 58 struct lbs_private *priv = file->private_data; 59 ssize_t ret; 60 struct sleep_params sp; 61 int p1, p2, p3, p4, p5, p6; 62 char *buf; 63 64 buf = memdup_user_nul(user_buf, min(count, len - 1)); 65 if (IS_ERR(buf)) 66 return PTR_ERR(buf); 67 68 ret = sscanf(buf, "%d %d %d %d %d %d", &p1, &p2, &p3, &p4, &p5, &p6); 69 if (ret != 6) { 70 ret = -EINVAL; 71 goto out_unlock; 72 } 73 sp.sp_error = p1; 74 sp.sp_offset = p2; 75 sp.sp_stabletime = p3; 76 sp.sp_calcontrol = p4; 77 sp.sp_extsleepclk = p5; 78 sp.sp_reserved = p6; 79 80 ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_SET, &sp); 81 if (!ret) 82 ret = count; 83 else if (ret > 0) 84 ret = -EINVAL; 85 86 out_unlock: 87 kfree(buf); 88 return ret; 89 } 90 91 static ssize_t lbs_sleepparams_read(struct file *file, char __user *userbuf, 92 size_t count, loff_t *ppos) 93 { 94 struct lbs_private *priv = file->private_data; 95 ssize_t ret; 96 size_t pos = 0; 97 struct sleep_params sp; 98 unsigned long addr = get_zeroed_page(GFP_KERNEL); 99 char *buf = (char *)addr; 100 if (!buf) 101 return -ENOMEM; 102 103 ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_GET, &sp); 104 if (ret) 105 goto out_unlock; 106 107 pos += snprintf(buf, len, "%d %d %d %d %d %d\n", sp.sp_error, 108 sp.sp_offset, sp.sp_stabletime, 109 sp.sp_calcontrol, sp.sp_extsleepclk, 110 sp.sp_reserved); 111 112 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 113 114 out_unlock: 115 free_page(addr); 116 return ret; 117 } 118 119 static ssize_t lbs_host_sleep_write(struct file *file, 120 const char __user *user_buf, size_t count, 121 loff_t *ppos) 122 { 123 struct lbs_private *priv = file->private_data; 124 ssize_t ret; 125 int host_sleep; 126 char *buf; 127 128 buf = memdup_user_nul(user_buf, min(count, len - 1)); 129 if (IS_ERR(buf)) 130 return PTR_ERR(buf); 131 132 ret = sscanf(buf, "%d", &host_sleep); 133 if (ret != 1) { 134 ret = -EINVAL; 135 goto out_unlock; 136 } 137 138 if (host_sleep == 0) 139 ret = lbs_set_host_sleep(priv, 0); 140 else if (host_sleep == 1) { 141 if (priv->wol_criteria == EHS_REMOVE_WAKEUP) { 142 netdev_info(priv->dev, 143 "wake parameters not configured\n"); 144 ret = -EINVAL; 145 goto out_unlock; 146 } 147 ret = lbs_set_host_sleep(priv, 1); 148 } else { 149 netdev_err(priv->dev, "invalid option\n"); 150 ret = -EINVAL; 151 } 152 153 if (!ret) 154 ret = count; 155 156 out_unlock: 157 kfree(buf); 158 return ret; 159 } 160 161 static ssize_t lbs_host_sleep_read(struct file *file, char __user *userbuf, 162 size_t count, loff_t *ppos) 163 { 164 struct lbs_private *priv = file->private_data; 165 ssize_t ret; 166 size_t pos = 0; 167 unsigned long addr = get_zeroed_page(GFP_KERNEL); 168 char *buf = (char *)addr; 169 if (!buf) 170 return -ENOMEM; 171 172 pos += snprintf(buf, len, "%d\n", priv->is_host_sleep_activated); 173 174 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 175 176 free_page(addr); 177 return ret; 178 } 179 180 /* 181 * When calling CMD_802_11_SUBSCRIBE_EVENT with CMD_ACT_GET, me might 182 * get a bunch of vendor-specific TLVs (a.k.a. IEs) back from the 183 * firmware. Here's an example: 184 * 04 01 02 00 00 00 05 01 02 00 00 00 06 01 02 00 185 * 00 00 07 01 02 00 3c 00 00 00 00 00 00 00 03 03 186 * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 187 * 188 * The 04 01 is the TLV type (here TLV_TYPE_RSSI_LOW), 02 00 is the length, 189 * 00 00 are the data bytes of this TLV. For this TLV, their meaning is 190 * defined in mrvlietypes_thresholds 191 * 192 * This function searches in this TLV data chunk for a given TLV type 193 * and returns a pointer to the first data byte of the TLV, or to NULL 194 * if the TLV hasn't been found. 195 */ 196 static void *lbs_tlv_find(uint16_t tlv_type, const uint8_t *tlv, uint16_t size) 197 { 198 struct mrvl_ie_header *tlv_h; 199 uint16_t length; 200 ssize_t pos = 0; 201 202 while (pos < size) { 203 tlv_h = (struct mrvl_ie_header *) tlv; 204 if (!tlv_h->len) 205 return NULL; 206 if (tlv_h->type == cpu_to_le16(tlv_type)) 207 return tlv_h; 208 length = le16_to_cpu(tlv_h->len) + sizeof(*tlv_h); 209 pos += length; 210 tlv += length; 211 } 212 return NULL; 213 } 214 215 216 static ssize_t lbs_threshold_read(uint16_t tlv_type, uint16_t event_mask, 217 struct file *file, char __user *userbuf, 218 size_t count, loff_t *ppos) 219 { 220 struct cmd_ds_802_11_subscribe_event *subscribed; 221 struct mrvl_ie_thresholds *got; 222 struct lbs_private *priv = file->private_data; 223 ssize_t ret = 0; 224 size_t pos = 0; 225 char *buf; 226 u8 value; 227 u8 freq; 228 int events = 0; 229 230 buf = (char *)get_zeroed_page(GFP_KERNEL); 231 if (!buf) 232 return -ENOMEM; 233 234 subscribed = kzalloc(sizeof(*subscribed), GFP_KERNEL); 235 if (!subscribed) { 236 ret = -ENOMEM; 237 goto out_page; 238 } 239 240 subscribed->hdr.size = cpu_to_le16(sizeof(*subscribed)); 241 subscribed->action = cpu_to_le16(CMD_ACT_GET); 242 243 ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, subscribed); 244 if (ret) 245 goto out_cmd; 246 247 got = lbs_tlv_find(tlv_type, subscribed->tlv, sizeof(subscribed->tlv)); 248 if (got) { 249 value = got->value; 250 freq = got->freq; 251 events = le16_to_cpu(subscribed->events); 252 253 pos += snprintf(buf, len, "%d %d %d\n", value, freq, 254 !!(events & event_mask)); 255 } 256 257 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 258 259 out_cmd: 260 kfree(subscribed); 261 262 out_page: 263 free_page((unsigned long)buf); 264 return ret; 265 } 266 267 268 static ssize_t lbs_threshold_write(uint16_t tlv_type, uint16_t event_mask, 269 struct file *file, 270 const char __user *userbuf, size_t count, 271 loff_t *ppos) 272 { 273 struct cmd_ds_802_11_subscribe_event *events; 274 struct mrvl_ie_thresholds *tlv; 275 struct lbs_private *priv = file->private_data; 276 int value, freq, new_mask; 277 uint16_t curr_mask; 278 char *buf; 279 int ret; 280 281 buf = memdup_user_nul(userbuf, min(count, len - 1)); 282 if (IS_ERR(buf)) 283 return PTR_ERR(buf); 284 285 ret = sscanf(buf, "%d %d %d", &value, &freq, &new_mask); 286 if (ret != 3) { 287 ret = -EINVAL; 288 goto out_page; 289 } 290 events = kzalloc(sizeof(*events), GFP_KERNEL); 291 if (!events) { 292 ret = -ENOMEM; 293 goto out_page; 294 } 295 296 events->hdr.size = cpu_to_le16(sizeof(*events)); 297 events->action = cpu_to_le16(CMD_ACT_GET); 298 299 ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, events); 300 if (ret) 301 goto out_events; 302 303 curr_mask = le16_to_cpu(events->events); 304 305 if (new_mask) 306 new_mask = curr_mask | event_mask; 307 else 308 new_mask = curr_mask & ~event_mask; 309 310 /* Now everything is set and we can send stuff down to the firmware */ 311 312 tlv = (void *)events->tlv; 313 314 events->action = cpu_to_le16(CMD_ACT_SET); 315 events->events = cpu_to_le16(new_mask); 316 tlv->header.type = cpu_to_le16(tlv_type); 317 tlv->header.len = cpu_to_le16(sizeof(*tlv) - sizeof(tlv->header)); 318 tlv->value = value; 319 if (tlv_type != TLV_TYPE_BCNMISS) 320 tlv->freq = freq; 321 322 /* The command header, the action, the event mask, and one TLV */ 323 events->hdr.size = cpu_to_le16(sizeof(events->hdr) + 4 + sizeof(*tlv)); 324 325 ret = lbs_cmd_with_response(priv, CMD_802_11_SUBSCRIBE_EVENT, events); 326 327 if (!ret) 328 ret = count; 329 out_events: 330 kfree(events); 331 out_page: 332 kfree(buf); 333 return ret; 334 } 335 336 337 static ssize_t lbs_lowrssi_read(struct file *file, char __user *userbuf, 338 size_t count, loff_t *ppos) 339 { 340 return lbs_threshold_read(TLV_TYPE_RSSI_LOW, CMD_SUBSCRIBE_RSSI_LOW, 341 file, userbuf, count, ppos); 342 } 343 344 345 static ssize_t lbs_lowrssi_write(struct file *file, const char __user *userbuf, 346 size_t count, loff_t *ppos) 347 { 348 return lbs_threshold_write(TLV_TYPE_RSSI_LOW, CMD_SUBSCRIBE_RSSI_LOW, 349 file, userbuf, count, ppos); 350 } 351 352 353 static ssize_t lbs_lowsnr_read(struct file *file, char __user *userbuf, 354 size_t count, loff_t *ppos) 355 { 356 return lbs_threshold_read(TLV_TYPE_SNR_LOW, CMD_SUBSCRIBE_SNR_LOW, 357 file, userbuf, count, ppos); 358 } 359 360 361 static ssize_t lbs_lowsnr_write(struct file *file, const char __user *userbuf, 362 size_t count, loff_t *ppos) 363 { 364 return lbs_threshold_write(TLV_TYPE_SNR_LOW, CMD_SUBSCRIBE_SNR_LOW, 365 file, userbuf, count, ppos); 366 } 367 368 369 static ssize_t lbs_failcount_read(struct file *file, char __user *userbuf, 370 size_t count, loff_t *ppos) 371 { 372 return lbs_threshold_read(TLV_TYPE_FAILCOUNT, CMD_SUBSCRIBE_FAILCOUNT, 373 file, userbuf, count, ppos); 374 } 375 376 377 static ssize_t lbs_failcount_write(struct file *file, const char __user *userbuf, 378 size_t count, loff_t *ppos) 379 { 380 return lbs_threshold_write(TLV_TYPE_FAILCOUNT, CMD_SUBSCRIBE_FAILCOUNT, 381 file, userbuf, count, ppos); 382 } 383 384 385 static ssize_t lbs_highrssi_read(struct file *file, char __user *userbuf, 386 size_t count, loff_t *ppos) 387 { 388 return lbs_threshold_read(TLV_TYPE_RSSI_HIGH, CMD_SUBSCRIBE_RSSI_HIGH, 389 file, userbuf, count, ppos); 390 } 391 392 393 static ssize_t lbs_highrssi_write(struct file *file, const char __user *userbuf, 394 size_t count, loff_t *ppos) 395 { 396 return lbs_threshold_write(TLV_TYPE_RSSI_HIGH, CMD_SUBSCRIBE_RSSI_HIGH, 397 file, userbuf, count, ppos); 398 } 399 400 401 static ssize_t lbs_highsnr_read(struct file *file, char __user *userbuf, 402 size_t count, loff_t *ppos) 403 { 404 return lbs_threshold_read(TLV_TYPE_SNR_HIGH, CMD_SUBSCRIBE_SNR_HIGH, 405 file, userbuf, count, ppos); 406 } 407 408 409 static ssize_t lbs_highsnr_write(struct file *file, const char __user *userbuf, 410 size_t count, loff_t *ppos) 411 { 412 return lbs_threshold_write(TLV_TYPE_SNR_HIGH, CMD_SUBSCRIBE_SNR_HIGH, 413 file, userbuf, count, ppos); 414 } 415 416 static ssize_t lbs_bcnmiss_read(struct file *file, char __user *userbuf, 417 size_t count, loff_t *ppos) 418 { 419 return lbs_threshold_read(TLV_TYPE_BCNMISS, CMD_SUBSCRIBE_BCNMISS, 420 file, userbuf, count, ppos); 421 } 422 423 424 static ssize_t lbs_bcnmiss_write(struct file *file, const char __user *userbuf, 425 size_t count, loff_t *ppos) 426 { 427 return lbs_threshold_write(TLV_TYPE_BCNMISS, CMD_SUBSCRIBE_BCNMISS, 428 file, userbuf, count, ppos); 429 } 430 431 432 static ssize_t lbs_rdmac_read(struct file *file, char __user *userbuf, 433 size_t count, loff_t *ppos) 434 { 435 struct lbs_private *priv = file->private_data; 436 ssize_t pos = 0; 437 int ret; 438 unsigned long addr = get_zeroed_page(GFP_KERNEL); 439 char *buf = (char *)addr; 440 u32 val = 0; 441 442 if (!buf) 443 return -ENOMEM; 444 445 ret = lbs_get_reg(priv, CMD_MAC_REG_ACCESS, priv->mac_offset, &val); 446 mdelay(10); 447 if (!ret) { 448 pos = snprintf(buf, len, "MAC[0x%x] = 0x%08x\n", 449 priv->mac_offset, val); 450 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 451 } 452 free_page(addr); 453 return ret; 454 } 455 456 static ssize_t lbs_rdmac_write(struct file *file, 457 const char __user *userbuf, 458 size_t count, loff_t *ppos) 459 { 460 struct lbs_private *priv = file->private_data; 461 char *buf; 462 463 buf = memdup_user_nul(userbuf, min(count, len - 1)); 464 if (IS_ERR(buf)) 465 return PTR_ERR(buf); 466 467 priv->mac_offset = simple_strtoul(buf, NULL, 16); 468 kfree(buf); 469 return count; 470 } 471 472 static ssize_t lbs_wrmac_write(struct file *file, 473 const char __user *userbuf, 474 size_t count, loff_t *ppos) 475 { 476 477 struct lbs_private *priv = file->private_data; 478 ssize_t res; 479 u32 offset, value; 480 char *buf; 481 482 buf = memdup_user_nul(userbuf, min(count, len - 1)); 483 if (IS_ERR(buf)) 484 return PTR_ERR(buf); 485 486 res = sscanf(buf, "%x %x", &offset, &value); 487 if (res != 2) { 488 res = -EFAULT; 489 goto out_unlock; 490 } 491 492 res = lbs_set_reg(priv, CMD_MAC_REG_ACCESS, offset, value); 493 mdelay(10); 494 495 if (!res) 496 res = count; 497 out_unlock: 498 kfree(buf); 499 return res; 500 } 501 502 static ssize_t lbs_rdbbp_read(struct file *file, char __user *userbuf, 503 size_t count, loff_t *ppos) 504 { 505 struct lbs_private *priv = file->private_data; 506 ssize_t pos = 0; 507 int ret; 508 unsigned long addr = get_zeroed_page(GFP_KERNEL); 509 char *buf = (char *)addr; 510 u32 val; 511 512 if (!buf) 513 return -ENOMEM; 514 515 ret = lbs_get_reg(priv, CMD_BBP_REG_ACCESS, priv->bbp_offset, &val); 516 mdelay(10); 517 if (!ret) { 518 pos = snprintf(buf, len, "BBP[0x%x] = 0x%08x\n", 519 priv->bbp_offset, val); 520 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 521 } 522 free_page(addr); 523 524 return ret; 525 } 526 527 static ssize_t lbs_rdbbp_write(struct file *file, 528 const char __user *userbuf, 529 size_t count, loff_t *ppos) 530 { 531 struct lbs_private *priv = file->private_data; 532 char *buf; 533 534 buf = memdup_user_nul(userbuf, min(count, len - 1)); 535 if (IS_ERR(buf)) 536 return PTR_ERR(buf); 537 538 priv->bbp_offset = simple_strtoul(buf, NULL, 16); 539 kfree(buf); 540 541 return count; 542 } 543 544 static ssize_t lbs_wrbbp_write(struct file *file, 545 const char __user *userbuf, 546 size_t count, loff_t *ppos) 547 { 548 549 struct lbs_private *priv = file->private_data; 550 ssize_t res; 551 u32 offset, value; 552 char *buf; 553 554 buf = memdup_user_nul(userbuf, min(count, len - 1)); 555 if (IS_ERR(buf)) 556 return PTR_ERR(buf); 557 558 res = sscanf(buf, "%x %x", &offset, &value); 559 if (res != 2) { 560 res = -EFAULT; 561 goto out_unlock; 562 } 563 564 res = lbs_set_reg(priv, CMD_BBP_REG_ACCESS, offset, value); 565 mdelay(10); 566 567 if (!res) 568 res = count; 569 out_unlock: 570 kfree(buf); 571 return res; 572 } 573 574 static ssize_t lbs_rdrf_read(struct file *file, char __user *userbuf, 575 size_t count, loff_t *ppos) 576 { 577 struct lbs_private *priv = file->private_data; 578 ssize_t pos = 0; 579 int ret; 580 unsigned long addr = get_zeroed_page(GFP_KERNEL); 581 char *buf = (char *)addr; 582 u32 val; 583 584 if (!buf) 585 return -ENOMEM; 586 587 ret = lbs_get_reg(priv, CMD_RF_REG_ACCESS, priv->rf_offset, &val); 588 mdelay(10); 589 if (!ret) { 590 pos = snprintf(buf, len, "RF[0x%x] = 0x%08x\n", 591 priv->rf_offset, val); 592 ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos); 593 } 594 free_page(addr); 595 596 return ret; 597 } 598 599 static ssize_t lbs_rdrf_write(struct file *file, 600 const char __user *userbuf, 601 size_t count, loff_t *ppos) 602 { 603 struct lbs_private *priv = file->private_data; 604 char *buf; 605 606 buf = memdup_user_nul(userbuf, min(count, len - 1)); 607 if (IS_ERR(buf)) 608 return PTR_ERR(buf); 609 610 priv->rf_offset = simple_strtoul(buf, NULL, 16); 611 kfree(buf); 612 return count; 613 } 614 615 static ssize_t lbs_wrrf_write(struct file *file, 616 const char __user *userbuf, 617 size_t count, loff_t *ppos) 618 { 619 620 struct lbs_private *priv = file->private_data; 621 ssize_t res; 622 u32 offset, value; 623 char *buf; 624 625 buf = memdup_user_nul(userbuf, min(count, len - 1)); 626 if (IS_ERR(buf)) 627 return PTR_ERR(buf); 628 629 res = sscanf(buf, "%x %x", &offset, &value); 630 if (res != 2) { 631 res = -EFAULT; 632 goto out_unlock; 633 } 634 635 res = lbs_set_reg(priv, CMD_RF_REG_ACCESS, offset, value); 636 mdelay(10); 637 638 if (!res) 639 res = count; 640 out_unlock: 641 kfree(buf); 642 return res; 643 } 644 645 #define FOPS(fread, fwrite) { \ 646 .owner = THIS_MODULE, \ 647 .open = simple_open, \ 648 .read = (fread), \ 649 .write = (fwrite), \ 650 .llseek = generic_file_llseek, \ 651 } 652 653 struct lbs_debugfs_files { 654 const char *name; 655 umode_t perm; 656 struct file_operations fops; 657 }; 658 659 static const struct lbs_debugfs_files debugfs_files[] = { 660 { "info", 0444, FOPS(lbs_dev_info, write_file_dummy), }, 661 { "sleepparams", 0644, FOPS(lbs_sleepparams_read, 662 lbs_sleepparams_write), }, 663 { "hostsleep", 0644, FOPS(lbs_host_sleep_read, 664 lbs_host_sleep_write), }, 665 }; 666 667 static const struct lbs_debugfs_files debugfs_events_files[] = { 668 {"low_rssi", 0644, FOPS(lbs_lowrssi_read, 669 lbs_lowrssi_write), }, 670 {"low_snr", 0644, FOPS(lbs_lowsnr_read, 671 lbs_lowsnr_write), }, 672 {"failure_count", 0644, FOPS(lbs_failcount_read, 673 lbs_failcount_write), }, 674 {"beacon_missed", 0644, FOPS(lbs_bcnmiss_read, 675 lbs_bcnmiss_write), }, 676 {"high_rssi", 0644, FOPS(lbs_highrssi_read, 677 lbs_highrssi_write), }, 678 {"high_snr", 0644, FOPS(lbs_highsnr_read, 679 lbs_highsnr_write), }, 680 }; 681 682 static const struct lbs_debugfs_files debugfs_regs_files[] = { 683 {"rdmac", 0644, FOPS(lbs_rdmac_read, lbs_rdmac_write), }, 684 {"wrmac", 0600, FOPS(NULL, lbs_wrmac_write), }, 685 {"rdbbp", 0644, FOPS(lbs_rdbbp_read, lbs_rdbbp_write), }, 686 {"wrbbp", 0600, FOPS(NULL, lbs_wrbbp_write), }, 687 {"rdrf", 0644, FOPS(lbs_rdrf_read, lbs_rdrf_write), }, 688 {"wrrf", 0600, FOPS(NULL, lbs_wrrf_write), }, 689 }; 690 691 void lbs_debugfs_init(void) 692 { 693 if (!lbs_dir) 694 lbs_dir = debugfs_create_dir("lbs_wireless", NULL); 695 } 696 697 void lbs_debugfs_remove(void) 698 { 699 debugfs_remove(lbs_dir); 700 } 701 702 void lbs_debugfs_init_one(struct lbs_private *priv, struct net_device *dev) 703 { 704 int i; 705 const struct lbs_debugfs_files *files; 706 if (!lbs_dir) 707 goto exit; 708 709 priv->debugfs_dir = debugfs_create_dir(dev->name, lbs_dir); 710 if (!priv->debugfs_dir) 711 goto exit; 712 713 for (i=0; i<ARRAY_SIZE(debugfs_files); i++) { 714 files = &debugfs_files[i]; 715 priv->debugfs_files[i] = debugfs_create_file(files->name, 716 files->perm, 717 priv->debugfs_dir, 718 priv, 719 &files->fops); 720 } 721 722 priv->events_dir = debugfs_create_dir("subscribed_events", priv->debugfs_dir); 723 if (!priv->events_dir) 724 goto exit; 725 726 for (i=0; i<ARRAY_SIZE(debugfs_events_files); i++) { 727 files = &debugfs_events_files[i]; 728 priv->debugfs_events_files[i] = debugfs_create_file(files->name, 729 files->perm, 730 priv->events_dir, 731 priv, 732 &files->fops); 733 } 734 735 priv->regs_dir = debugfs_create_dir("registers", priv->debugfs_dir); 736 if (!priv->regs_dir) 737 goto exit; 738 739 for (i=0; i<ARRAY_SIZE(debugfs_regs_files); i++) { 740 files = &debugfs_regs_files[i]; 741 priv->debugfs_regs_files[i] = debugfs_create_file(files->name, 742 files->perm, 743 priv->regs_dir, 744 priv, 745 &files->fops); 746 } 747 748 #ifdef PROC_DEBUG 749 lbs_debug_init(priv); 750 #endif 751 exit: 752 return; 753 } 754 755 void lbs_debugfs_remove_one(struct lbs_private *priv) 756 { 757 int i; 758 759 for(i=0; i<ARRAY_SIZE(debugfs_regs_files); i++) 760 debugfs_remove(priv->debugfs_regs_files[i]); 761 762 debugfs_remove(priv->regs_dir); 763 764 for(i=0; i<ARRAY_SIZE(debugfs_events_files); i++) 765 debugfs_remove(priv->debugfs_events_files[i]); 766 767 debugfs_remove(priv->events_dir); 768 #ifdef PROC_DEBUG 769 debugfs_remove(priv->debugfs_debug); 770 #endif 771 for(i=0; i<ARRAY_SIZE(debugfs_files); i++) 772 debugfs_remove(priv->debugfs_files[i]); 773 debugfs_remove(priv->debugfs_dir); 774 } 775 776 777 778 /* debug entry */ 779 780 #ifdef PROC_DEBUG 781 782 #define item_size(n) (FIELD_SIZEOF(struct lbs_private, n)) 783 #define item_addr(n) (offsetof(struct lbs_private, n)) 784 785 786 struct debug_data { 787 char name[32]; 788 u32 size; 789 size_t addr; 790 }; 791 792 /* To debug any member of struct lbs_private, simply add one line here. 793 */ 794 static struct debug_data items[] = { 795 {"psmode", item_size(psmode), item_addr(psmode)}, 796 {"psstate", item_size(psstate), item_addr(psstate)}, 797 }; 798 799 static int num_of_items = ARRAY_SIZE(items); 800 801 /** 802 * lbs_debugfs_read - proc read function 803 * 804 * @file: file to read 805 * @userbuf: pointer to buffer 806 * @count: number of bytes to read 807 * @ppos: read data starting position 808 * 809 * returns: amount of data read or negative error code 810 */ 811 static ssize_t lbs_debugfs_read(struct file *file, char __user *userbuf, 812 size_t count, loff_t *ppos) 813 { 814 int val = 0; 815 size_t pos = 0; 816 ssize_t res; 817 char *p; 818 int i; 819 struct debug_data *d; 820 unsigned long addr = get_zeroed_page(GFP_KERNEL); 821 char *buf = (char *)addr; 822 if (!buf) 823 return -ENOMEM; 824 825 p = buf; 826 827 d = file->private_data; 828 829 for (i = 0; i < num_of_items; i++) { 830 if (d[i].size == 1) 831 val = *((u8 *) d[i].addr); 832 else if (d[i].size == 2) 833 val = *((u16 *) d[i].addr); 834 else if (d[i].size == 4) 835 val = *((u32 *) d[i].addr); 836 else if (d[i].size == 8) 837 val = *((u64 *) d[i].addr); 838 839 pos += sprintf(p + pos, "%s=%d\n", d[i].name, val); 840 } 841 842 res = simple_read_from_buffer(userbuf, count, ppos, p, pos); 843 844 free_page(addr); 845 return res; 846 } 847 848 /** 849 * lbs_debugfs_write - proc write function 850 * 851 * @f: file pointer 852 * @buf: pointer to data buffer 853 * @cnt: data number to write 854 * @ppos: file position 855 * 856 * returns: amount of data written 857 */ 858 static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf, 859 size_t cnt, loff_t *ppos) 860 { 861 int r, i; 862 char *pdata; 863 char *p; 864 char *p0; 865 char *p1; 866 char *p2; 867 struct debug_data *d = f->private_data; 868 869 if (cnt == 0) 870 return 0; 871 872 pdata = memdup_user_nul(buf, cnt); 873 if (IS_ERR(pdata)) 874 return PTR_ERR(pdata); 875 876 p0 = pdata; 877 for (i = 0; i < num_of_items; i++) { 878 do { 879 p = strstr(p0, d[i].name); 880 if (p == NULL) 881 break; 882 p1 = strchr(p, '\n'); 883 if (p1 == NULL) 884 break; 885 p0 = p1++; 886 p2 = strchr(p, '='); 887 if (!p2) 888 break; 889 p2++; 890 r = simple_strtoul(p2, NULL, 0); 891 if (d[i].size == 1) 892 *((u8 *) d[i].addr) = (u8) r; 893 else if (d[i].size == 2) 894 *((u16 *) d[i].addr) = (u16) r; 895 else if (d[i].size == 4) 896 *((u32 *) d[i].addr) = (u32) r; 897 else if (d[i].size == 8) 898 *((u64 *) d[i].addr) = (u64) r; 899 break; 900 } while (1); 901 } 902 kfree(pdata); 903 904 return (ssize_t)cnt; 905 } 906 907 static const struct file_operations lbs_debug_fops = { 908 .owner = THIS_MODULE, 909 .open = simple_open, 910 .write = lbs_debugfs_write, 911 .read = lbs_debugfs_read, 912 .llseek = default_llseek, 913 }; 914 915 /** 916 * lbs_debug_init - create debug proc file 917 * 918 * @priv: pointer to &struct lbs_private 919 * 920 * returns: N/A 921 */ 922 static void lbs_debug_init(struct lbs_private *priv) 923 { 924 int i; 925 926 if (!priv->debugfs_dir) 927 return; 928 929 for (i = 0; i < num_of_items; i++) 930 items[i].addr += (size_t) priv; 931 932 priv->debugfs_debug = debugfs_create_file("debug", 0644, 933 priv->debugfs_dir, &items[0], 934 &lbs_debug_fops); 935 } 936 #endif 937