1 /* 2 * Copyright (c) 2001-2002 by David Brownell 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License as published by the 6 * Free Software Foundation; either version 2 of the License, or (at your 7 * option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software Foundation, 16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 /* this file is part of ehci-hcd.c */ 20 21 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG) 22 23 /* check the values in the HCSPARAMS register 24 * (host controller _Structural_ parameters) 25 * see EHCI spec, Table 2-4 for each value 26 */ 27 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label) 28 { 29 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params); 30 31 ehci_dbg (ehci, 32 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n", 33 label, params, 34 HCS_DEBUG_PORT (params), 35 HCS_INDICATOR (params) ? " ind" : "", 36 HCS_N_CC (params), 37 HCS_N_PCC (params), 38 HCS_PORTROUTED (params) ? "" : " ordered", 39 HCS_PPC (params) ? "" : " !ppc", 40 HCS_N_PORTS (params) 41 ); 42 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */ 43 if (HCS_PORTROUTED (params)) { 44 int i; 45 char buf [46], tmp [7], byte; 46 47 buf[0] = 0; 48 for (i = 0; i < HCS_N_PORTS (params); i++) { 49 // FIXME MIPS won't readb() ... 50 byte = readb (&ehci->caps->portroute[(i>>1)]); 51 sprintf(tmp, "%d ", 52 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf))); 53 strcat(buf, tmp); 54 } 55 ehci_dbg (ehci, "%s portroute %s\n", 56 label, buf); 57 } 58 } 59 #else 60 61 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {} 62 63 #endif 64 65 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG) 66 67 /* check the values in the HCCPARAMS register 68 * (host controller _Capability_ parameters) 69 * see EHCI Spec, Table 2-5 for each value 70 * */ 71 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label) 72 { 73 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params); 74 75 if (HCC_ISOC_CACHE (params)) { 76 ehci_dbg (ehci, 77 "%s hcc_params %04x caching frame %s%s%s\n", 78 label, params, 79 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", 80 HCC_CANPARK(params) ? " park" : "", 81 HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); 82 } else { 83 ehci_dbg (ehci, 84 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n", 85 label, 86 params, 87 HCC_ISOC_THRES(params), 88 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", 89 HCC_CANPARK(params) ? " park" : "", 90 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "", 91 HCC_LPM(params) ? " LPM" : "", 92 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "", 93 HCC_HW_PREFETCH(params) ? " hw prefetch" : "", 94 HCC_32FRAME_PERIODIC_LIST(params) ? 95 " 32 periodic list" : ""); 96 } 97 } 98 #else 99 100 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {} 101 102 #endif 103 104 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG) 105 106 static void __maybe_unused 107 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd) 108 { 109 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd, 110 hc32_to_cpup(ehci, &qtd->hw_next), 111 hc32_to_cpup(ehci, &qtd->hw_alt_next), 112 hc32_to_cpup(ehci, &qtd->hw_token), 113 hc32_to_cpup(ehci, &qtd->hw_buf [0])); 114 if (qtd->hw_buf [1]) 115 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n", 116 hc32_to_cpup(ehci, &qtd->hw_buf[1]), 117 hc32_to_cpup(ehci, &qtd->hw_buf[2]), 118 hc32_to_cpup(ehci, &qtd->hw_buf[3]), 119 hc32_to_cpup(ehci, &qtd->hw_buf[4])); 120 } 121 122 static void __maybe_unused 123 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 124 { 125 struct ehci_qh_hw *hw = qh->hw; 126 127 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label, 128 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current); 129 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next); 130 } 131 132 static void __maybe_unused 133 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd) 134 { 135 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n", 136 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next), 137 itd->urb); 138 ehci_dbg (ehci, 139 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", 140 hc32_to_cpu(ehci, itd->hw_transaction[0]), 141 hc32_to_cpu(ehci, itd->hw_transaction[1]), 142 hc32_to_cpu(ehci, itd->hw_transaction[2]), 143 hc32_to_cpu(ehci, itd->hw_transaction[3]), 144 hc32_to_cpu(ehci, itd->hw_transaction[4]), 145 hc32_to_cpu(ehci, itd->hw_transaction[5]), 146 hc32_to_cpu(ehci, itd->hw_transaction[6]), 147 hc32_to_cpu(ehci, itd->hw_transaction[7])); 148 ehci_dbg (ehci, 149 " buf: %08x %08x %08x %08x %08x %08x %08x\n", 150 hc32_to_cpu(ehci, itd->hw_bufp[0]), 151 hc32_to_cpu(ehci, itd->hw_bufp[1]), 152 hc32_to_cpu(ehci, itd->hw_bufp[2]), 153 hc32_to_cpu(ehci, itd->hw_bufp[3]), 154 hc32_to_cpu(ehci, itd->hw_bufp[4]), 155 hc32_to_cpu(ehci, itd->hw_bufp[5]), 156 hc32_to_cpu(ehci, itd->hw_bufp[6])); 157 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n", 158 itd->index[0], itd->index[1], itd->index[2], 159 itd->index[3], itd->index[4], itd->index[5], 160 itd->index[6], itd->index[7]); 161 } 162 163 static void __maybe_unused 164 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) 165 { 166 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n", 167 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next), 168 sitd->urb); 169 ehci_dbg (ehci, 170 " addr %08x sched %04x result %08x buf %08x %08x\n", 171 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep), 172 hc32_to_cpu(ehci, sitd->hw_uframe), 173 hc32_to_cpu(ehci, sitd->hw_results), 174 hc32_to_cpu(ehci, sitd->hw_buf[0]), 175 hc32_to_cpu(ehci, sitd->hw_buf[1])); 176 } 177 178 static int __maybe_unused 179 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 180 { 181 return scnprintf (buf, len, 182 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s", 183 label, label [0] ? " " : "", status, 184 (status & STS_PPCE_MASK) ? " PPCE" : "", 185 (status & STS_ASS) ? " Async" : "", 186 (status & STS_PSS) ? " Periodic" : "", 187 (status & STS_RECL) ? " Recl" : "", 188 (status & STS_HALT) ? " Halt" : "", 189 (status & STS_IAA) ? " IAA" : "", 190 (status & STS_FATAL) ? " FATAL" : "", 191 (status & STS_FLR) ? " FLR" : "", 192 (status & STS_PCD) ? " PCD" : "", 193 (status & STS_ERR) ? " ERR" : "", 194 (status & STS_INT) ? " INT" : "" 195 ); 196 } 197 198 static int __maybe_unused 199 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 200 { 201 return scnprintf (buf, len, 202 "%s%sintrenable %02x%s%s%s%s%s%s%s", 203 label, label [0] ? " " : "", enable, 204 (enable & STS_PPCE_MASK) ? " PPCE" : "", 205 (enable & STS_IAA) ? " IAA" : "", 206 (enable & STS_FATAL) ? " FATAL" : "", 207 (enable & STS_FLR) ? " FLR" : "", 208 (enable & STS_PCD) ? " PCD" : "", 209 (enable & STS_ERR) ? " ERR" : "", 210 (enable & STS_INT) ? " INT" : "" 211 ); 212 } 213 214 static const char *const fls_strings [] = 215 { "1024", "512", "256", "??" }; 216 217 static int 218 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 219 { 220 return scnprintf (buf, len, 221 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s " 222 "period=%s%s %s", 223 label, label [0] ? " " : "", command, 224 (command & CMD_HIRD) ? " HIRD" : "", 225 (command & CMD_PPCEE) ? " PPCEE" : "", 226 (command & CMD_FSP) ? " FSP" : "", 227 (command & CMD_ASPE) ? " ASPE" : "", 228 (command & CMD_PSPE) ? " PSPE" : "", 229 (command & CMD_PARK) ? " park" : "(park)", 230 CMD_PARK_CNT (command), 231 (command >> 16) & 0x3f, 232 (command & CMD_LRESET) ? " LReset" : "", 233 (command & CMD_IAAD) ? " IAAD" : "", 234 (command & CMD_ASE) ? " Async" : "", 235 (command & CMD_PSE) ? " Periodic" : "", 236 fls_strings [(command >> 2) & 0x3], 237 (command & CMD_RESET) ? " Reset" : "", 238 (command & CMD_RUN) ? "RUN" : "HALT" 239 ); 240 } 241 242 static int 243 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 244 { 245 char *sig; 246 247 /* signaling state */ 248 switch (status & (3 << 10)) { 249 case 0 << 10: sig = "se0"; break; 250 case 1 << 10: sig = "k"; break; /* low speed */ 251 case 2 << 10: sig = "j"; break; 252 default: sig = "?"; break; 253 } 254 255 return scnprintf (buf, len, 256 "%s%sport:%d status %06x %d %s%s%s%s%s%s " 257 "sig=%s%s%s%s%s%s%s%s%s%s%s", 258 label, label [0] ? " " : "", port, status, 259 status>>25,/*device address */ 260 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ? 261 " ACK" : "", 262 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ? 263 " NYET" : "", 264 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ? 265 " STALL" : "", 266 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ? 267 " ERR" : "", 268 (status & PORT_POWER) ? " POWER" : "", 269 (status & PORT_OWNER) ? " OWNER" : "", 270 sig, 271 (status & PORT_LPM) ? " LPM" : "", 272 (status & PORT_RESET) ? " RESET" : "", 273 (status & PORT_SUSPEND) ? " SUSPEND" : "", 274 (status & PORT_RESUME) ? " RESUME" : "", 275 (status & PORT_OCC) ? " OCC" : "", 276 (status & PORT_OC) ? " OC" : "", 277 (status & PORT_PEC) ? " PEC" : "", 278 (status & PORT_PE) ? " PE" : "", 279 (status & PORT_CSC) ? " CSC" : "", 280 (status & PORT_CONNECT) ? " CONNECT" : ""); 281 } 282 283 #else 284 static inline void __maybe_unused 285 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 286 {} 287 288 static inline int __maybe_unused 289 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 290 { return 0; } 291 292 static inline int __maybe_unused 293 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 294 { return 0; } 295 296 static inline int __maybe_unused 297 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 298 { return 0; } 299 300 static inline int __maybe_unused 301 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 302 { return 0; } 303 304 #endif /* DEBUG || CONFIG_DYNAMIC_DEBUG */ 305 306 /* functions have the "wrong" filename when they're output... */ 307 #define dbg_status(ehci, label, status) { \ 308 char _buf [80]; \ 309 dbg_status_buf (_buf, sizeof _buf, label, status); \ 310 ehci_dbg (ehci, "%s\n", _buf); \ 311 } 312 313 #define dbg_cmd(ehci, label, command) { \ 314 char _buf [80]; \ 315 dbg_command_buf (_buf, sizeof _buf, label, command); \ 316 ehci_dbg (ehci, "%s\n", _buf); \ 317 } 318 319 #define dbg_port(ehci, label, port, status) { \ 320 char _buf [80]; \ 321 dbg_port_buf (_buf, sizeof _buf, label, port, status); \ 322 ehci_dbg (ehci, "%s\n", _buf); \ 323 } 324 325 /*-------------------------------------------------------------------------*/ 326 327 #ifdef STUB_DEBUG_FILES 328 329 static inline void create_debug_files (struct ehci_hcd *bus) { } 330 static inline void remove_debug_files (struct ehci_hcd *bus) { } 331 332 #else 333 334 /* troubleshooting help: expose state in debugfs */ 335 336 static int debug_async_open(struct inode *, struct file *); 337 static int debug_periodic_open(struct inode *, struct file *); 338 static int debug_registers_open(struct inode *, struct file *); 339 340 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); 341 static int debug_close(struct inode *, struct file *); 342 343 static const struct file_operations debug_async_fops = { 344 .owner = THIS_MODULE, 345 .open = debug_async_open, 346 .read = debug_output, 347 .release = debug_close, 348 .llseek = default_llseek, 349 }; 350 static const struct file_operations debug_periodic_fops = { 351 .owner = THIS_MODULE, 352 .open = debug_periodic_open, 353 .read = debug_output, 354 .release = debug_close, 355 .llseek = default_llseek, 356 }; 357 static const struct file_operations debug_registers_fops = { 358 .owner = THIS_MODULE, 359 .open = debug_registers_open, 360 .read = debug_output, 361 .release = debug_close, 362 .llseek = default_llseek, 363 }; 364 365 static struct dentry *ehci_debug_root; 366 367 struct debug_buffer { 368 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ 369 struct usb_bus *bus; 370 struct mutex mutex; /* protect filling of buffer */ 371 size_t count; /* number of characters filled into buffer */ 372 char *output_buf; 373 size_t alloc_size; 374 }; 375 376 #define speed_char(info1) ({ char tmp; \ 377 switch (info1 & (3 << 12)) { \ 378 case QH_FULL_SPEED: tmp = 'f'; break; \ 379 case QH_LOW_SPEED: tmp = 'l'; break; \ 380 case QH_HIGH_SPEED: tmp = 'h'; break; \ 381 default: tmp = '?'; break; \ 382 }; tmp; }) 383 384 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token) 385 { 386 __u32 v = hc32_to_cpu(ehci, token); 387 388 if (v & QTD_STS_ACTIVE) 389 return '*'; 390 if (v & QTD_STS_HALT) 391 return '-'; 392 if (!IS_SHORT_READ (v)) 393 return ' '; 394 /* tries to advance through hw_alt_next */ 395 return '/'; 396 } 397 398 static void qh_lines ( 399 struct ehci_hcd *ehci, 400 struct ehci_qh *qh, 401 char **nextp, 402 unsigned *sizep 403 ) 404 { 405 u32 scratch; 406 u32 hw_curr; 407 struct list_head *entry; 408 struct ehci_qtd *td; 409 unsigned temp; 410 unsigned size = *sizep; 411 char *next = *nextp; 412 char mark; 413 __le32 list_end = EHCI_LIST_END(ehci); 414 struct ehci_qh_hw *hw = qh->hw; 415 416 if (hw->hw_qtd_next == list_end) /* NEC does this */ 417 mark = '@'; 418 else 419 mark = token_mark(ehci, hw->hw_token); 420 if (mark == '/') { /* qh_alt_next controls qh advance? */ 421 if ((hw->hw_alt_next & QTD_MASK(ehci)) 422 == ehci->async->hw->hw_alt_next) 423 mark = '#'; /* blocked */ 424 else if (hw->hw_alt_next == list_end) 425 mark = '.'; /* use hw_qtd_next */ 426 /* else alt_next points to some other qtd */ 427 } 428 scratch = hc32_to_cpup(ehci, &hw->hw_info1); 429 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0; 430 temp = scnprintf (next, size, 431 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)", 432 qh, scratch & 0x007f, 433 speed_char (scratch), 434 (scratch >> 8) & 0x000f, 435 scratch, hc32_to_cpup(ehci, &hw->hw_info2), 436 hc32_to_cpup(ehci, &hw->hw_token), mark, 437 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) 438 ? "data1" : "data0", 439 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f); 440 size -= temp; 441 next += temp; 442 443 /* hc may be modifying the list as we read it ... */ 444 list_for_each (entry, &qh->qtd_list) { 445 td = list_entry (entry, struct ehci_qtd, qtd_list); 446 scratch = hc32_to_cpup(ehci, &td->hw_token); 447 mark = ' '; 448 if (hw_curr == td->qtd_dma) 449 mark = '*'; 450 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) 451 mark = '+'; 452 else if (QTD_LENGTH (scratch)) { 453 if (td->hw_alt_next == ehci->async->hw->hw_alt_next) 454 mark = '#'; 455 else if (td->hw_alt_next != list_end) 456 mark = '/'; 457 } 458 temp = snprintf (next, size, 459 "\n\t%p%c%s len=%d %08x urb %p", 460 td, mark, ({ char *tmp; 461 switch ((scratch>>8)&0x03) { 462 case 0: tmp = "out"; break; 463 case 1: tmp = "in"; break; 464 case 2: tmp = "setup"; break; 465 default: tmp = "?"; break; 466 } tmp;}), 467 (scratch >> 16) & 0x7fff, 468 scratch, 469 td->urb); 470 if (size < temp) 471 temp = size; 472 size -= temp; 473 next += temp; 474 if (temp == size) 475 goto done; 476 } 477 478 temp = snprintf (next, size, "\n"); 479 if (size < temp) 480 temp = size; 481 size -= temp; 482 next += temp; 483 484 done: 485 *sizep = size; 486 *nextp = next; 487 } 488 489 static ssize_t fill_async_buffer(struct debug_buffer *buf) 490 { 491 struct usb_hcd *hcd; 492 struct ehci_hcd *ehci; 493 unsigned long flags; 494 unsigned temp, size; 495 char *next; 496 struct ehci_qh *qh; 497 498 hcd = bus_to_hcd(buf->bus); 499 ehci = hcd_to_ehci (hcd); 500 next = buf->output_buf; 501 size = buf->alloc_size; 502 503 *next = 0; 504 505 /* dumps a snapshot of the async schedule. 506 * usually empty except for long-term bulk reads, or head. 507 * one QH per line, and TDs we know about 508 */ 509 spin_lock_irqsave (&ehci->lock, flags); 510 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) 511 qh_lines (ehci, qh, &next, &size); 512 if (!list_empty(&ehci->async_unlink) && size > 0) { 513 temp = scnprintf(next, size, "\nunlink =\n"); 514 size -= temp; 515 next += temp; 516 517 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) { 518 if (size <= 0) 519 break; 520 qh_lines(ehci, qh, &next, &size); 521 } 522 } 523 spin_unlock_irqrestore (&ehci->lock, flags); 524 525 return strlen(buf->output_buf); 526 } 527 528 #define DBG_SCHED_LIMIT 64 529 static ssize_t fill_periodic_buffer(struct debug_buffer *buf) 530 { 531 struct usb_hcd *hcd; 532 struct ehci_hcd *ehci; 533 unsigned long flags; 534 union ehci_shadow p, *seen; 535 unsigned temp, size, seen_count; 536 char *next; 537 unsigned i; 538 __hc32 tag; 539 540 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) 541 return 0; 542 seen_count = 0; 543 544 hcd = bus_to_hcd(buf->bus); 545 ehci = hcd_to_ehci (hcd); 546 next = buf->output_buf; 547 size = buf->alloc_size; 548 549 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); 550 size -= temp; 551 next += temp; 552 553 /* dump a snapshot of the periodic schedule. 554 * iso changes, interrupt usually doesn't. 555 */ 556 spin_lock_irqsave (&ehci->lock, flags); 557 for (i = 0; i < ehci->periodic_size; i++) { 558 p = ehci->pshadow [i]; 559 if (likely (!p.ptr)) 560 continue; 561 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); 562 563 temp = scnprintf (next, size, "%4d: ", i); 564 size -= temp; 565 next += temp; 566 567 do { 568 struct ehci_qh_hw *hw; 569 570 switch (hc32_to_cpu(ehci, tag)) { 571 case Q_TYPE_QH: 572 hw = p.qh->hw; 573 temp = scnprintf (next, size, " qh%d-%04x/%p", 574 p.qh->period, 575 hc32_to_cpup(ehci, 576 &hw->hw_info2) 577 /* uframe masks */ 578 & (QH_CMASK | QH_SMASK), 579 p.qh); 580 size -= temp; 581 next += temp; 582 /* don't repeat what follows this qh */ 583 for (temp = 0; temp < seen_count; temp++) { 584 if (seen [temp].ptr != p.ptr) 585 continue; 586 if (p.qh->qh_next.ptr) { 587 temp = scnprintf (next, size, 588 " ..."); 589 size -= temp; 590 next += temp; 591 } 592 break; 593 } 594 /* show more info the first time around */ 595 if (temp == seen_count) { 596 u32 scratch = hc32_to_cpup(ehci, 597 &hw->hw_info1); 598 struct ehci_qtd *qtd; 599 char *type = ""; 600 601 /* count tds, get ep direction */ 602 temp = 0; 603 list_for_each_entry (qtd, 604 &p.qh->qtd_list, 605 qtd_list) { 606 temp++; 607 switch (0x03 & (hc32_to_cpu( 608 ehci, 609 qtd->hw_token) >> 8)) { 610 case 0: type = "out"; continue; 611 case 1: type = "in"; continue; 612 } 613 } 614 615 temp = scnprintf (next, size, 616 " (%c%d ep%d%s " 617 "[%d/%d] q%d p%d)", 618 speed_char (scratch), 619 scratch & 0x007f, 620 (scratch >> 8) & 0x000f, type, 621 p.qh->usecs, p.qh->c_usecs, 622 temp, 623 0x7ff & (scratch >> 16)); 624 625 if (seen_count < DBG_SCHED_LIMIT) 626 seen [seen_count++].qh = p.qh; 627 } else 628 temp = 0; 629 tag = Q_NEXT_TYPE(ehci, hw->hw_next); 630 p = p.qh->qh_next; 631 break; 632 case Q_TYPE_FSTN: 633 temp = scnprintf (next, size, 634 " fstn-%8x/%p", p.fstn->hw_prev, 635 p.fstn); 636 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); 637 p = p.fstn->fstn_next; 638 break; 639 case Q_TYPE_ITD: 640 temp = scnprintf (next, size, 641 " itd/%p", p.itd); 642 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); 643 p = p.itd->itd_next; 644 break; 645 case Q_TYPE_SITD: 646 temp = scnprintf (next, size, 647 " sitd%d-%04x/%p", 648 p.sitd->stream->interval, 649 hc32_to_cpup(ehci, &p.sitd->hw_uframe) 650 & 0x0000ffff, 651 p.sitd); 652 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); 653 p = p.sitd->sitd_next; 654 break; 655 } 656 size -= temp; 657 next += temp; 658 } while (p.ptr); 659 660 temp = scnprintf (next, size, "\n"); 661 size -= temp; 662 next += temp; 663 } 664 spin_unlock_irqrestore (&ehci->lock, flags); 665 kfree (seen); 666 667 return buf->alloc_size - size; 668 } 669 #undef DBG_SCHED_LIMIT 670 671 static const char *rh_state_string(struct ehci_hcd *ehci) 672 { 673 switch (ehci->rh_state) { 674 case EHCI_RH_HALTED: 675 return "halted"; 676 case EHCI_RH_SUSPENDED: 677 return "suspended"; 678 case EHCI_RH_RUNNING: 679 return "running"; 680 case EHCI_RH_STOPPING: 681 return "stopping"; 682 } 683 return "?"; 684 } 685 686 static ssize_t fill_registers_buffer(struct debug_buffer *buf) 687 { 688 struct usb_hcd *hcd; 689 struct ehci_hcd *ehci; 690 unsigned long flags; 691 unsigned temp, size, i; 692 char *next, scratch [80]; 693 static char fmt [] = "%*s\n"; 694 static char label [] = ""; 695 696 hcd = bus_to_hcd(buf->bus); 697 ehci = hcd_to_ehci (hcd); 698 next = buf->output_buf; 699 size = buf->alloc_size; 700 701 spin_lock_irqsave (&ehci->lock, flags); 702 703 if (!HCD_HW_ACCESSIBLE(hcd)) { 704 size = scnprintf (next, size, 705 "bus %s, device %s\n" 706 "%s\n" 707 "SUSPENDED (no register access)\n", 708 hcd->self.controller->bus->name, 709 dev_name(hcd->self.controller), 710 hcd->product_desc); 711 goto done; 712 } 713 714 /* Capability Registers */ 715 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 716 temp = scnprintf (next, size, 717 "bus %s, device %s\n" 718 "%s\n" 719 "EHCI %x.%02x, rh state %s\n", 720 hcd->self.controller->bus->name, 721 dev_name(hcd->self.controller), 722 hcd->product_desc, 723 i >> 8, i & 0x0ff, rh_state_string(ehci)); 724 size -= temp; 725 next += temp; 726 727 #ifdef CONFIG_PCI 728 /* EHCI 0.96 and later may have "extended capabilities" */ 729 if (hcd->self.controller->bus == &pci_bus_type) { 730 struct pci_dev *pdev; 731 u32 offset, cap, cap2; 732 unsigned count = 256/4; 733 734 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); 735 offset = HCC_EXT_CAPS(ehci_readl(ehci, 736 &ehci->caps->hcc_params)); 737 while (offset && count--) { 738 pci_read_config_dword (pdev, offset, &cap); 739 switch (cap & 0xff) { 740 case 1: 741 temp = scnprintf (next, size, 742 "ownership %08x%s%s\n", cap, 743 (cap & (1 << 24)) ? " linux" : "", 744 (cap & (1 << 16)) ? " firmware" : ""); 745 size -= temp; 746 next += temp; 747 748 offset += 4; 749 pci_read_config_dword (pdev, offset, &cap2); 750 temp = scnprintf (next, size, 751 "SMI sts/enable 0x%08x\n", cap2); 752 size -= temp; 753 next += temp; 754 break; 755 case 0: /* illegal reserved capability */ 756 cap = 0; 757 /* FALLTHROUGH */ 758 default: /* unknown */ 759 break; 760 } 761 temp = (cap >> 8) & 0xff; 762 } 763 } 764 #endif 765 766 // FIXME interpret both types of params 767 i = ehci_readl(ehci, &ehci->caps->hcs_params); 768 temp = scnprintf (next, size, "structural params 0x%08x\n", i); 769 size -= temp; 770 next += temp; 771 772 i = ehci_readl(ehci, &ehci->caps->hcc_params); 773 temp = scnprintf (next, size, "capability params 0x%08x\n", i); 774 size -= temp; 775 next += temp; 776 777 /* Operational Registers */ 778 temp = dbg_status_buf (scratch, sizeof scratch, label, 779 ehci_readl(ehci, &ehci->regs->status)); 780 temp = scnprintf (next, size, fmt, temp, scratch); 781 size -= temp; 782 next += temp; 783 784 temp = dbg_command_buf (scratch, sizeof scratch, label, 785 ehci_readl(ehci, &ehci->regs->command)); 786 temp = scnprintf (next, size, fmt, temp, scratch); 787 size -= temp; 788 next += temp; 789 790 temp = dbg_intr_buf (scratch, sizeof scratch, label, 791 ehci_readl(ehci, &ehci->regs->intr_enable)); 792 temp = scnprintf (next, size, fmt, temp, scratch); 793 size -= temp; 794 next += temp; 795 796 temp = scnprintf (next, size, "uframe %04x\n", 797 ehci_read_frame_index(ehci)); 798 size -= temp; 799 next += temp; 800 801 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { 802 temp = dbg_port_buf (scratch, sizeof scratch, label, i, 803 ehci_readl(ehci, 804 &ehci->regs->port_status[i - 1])); 805 temp = scnprintf (next, size, fmt, temp, scratch); 806 size -= temp; 807 next += temp; 808 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { 809 temp = scnprintf (next, size, 810 " debug control %08x\n", 811 ehci_readl(ehci, 812 &ehci->debug->control)); 813 size -= temp; 814 next += temp; 815 } 816 } 817 818 if (!list_empty(&ehci->async_unlink)) { 819 temp = scnprintf(next, size, "async unlink qh %p\n", 820 list_first_entry(&ehci->async_unlink, 821 struct ehci_qh, unlink_node)); 822 size -= temp; 823 next += temp; 824 } 825 826 #ifdef EHCI_STATS 827 temp = scnprintf (next, size, 828 "irq normal %ld err %ld iaa %ld (lost %ld)\n", 829 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa, 830 ehci->stats.lost_iaa); 831 size -= temp; 832 next += temp; 833 834 temp = scnprintf (next, size, "complete %ld unlink %ld\n", 835 ehci->stats.complete, ehci->stats.unlink); 836 size -= temp; 837 next += temp; 838 #endif 839 840 done: 841 spin_unlock_irqrestore (&ehci->lock, flags); 842 843 return buf->alloc_size - size; 844 } 845 846 static struct debug_buffer *alloc_buffer(struct usb_bus *bus, 847 ssize_t (*fill_func)(struct debug_buffer *)) 848 { 849 struct debug_buffer *buf; 850 851 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); 852 853 if (buf) { 854 buf->bus = bus; 855 buf->fill_func = fill_func; 856 mutex_init(&buf->mutex); 857 buf->alloc_size = PAGE_SIZE; 858 } 859 860 return buf; 861 } 862 863 static int fill_buffer(struct debug_buffer *buf) 864 { 865 int ret = 0; 866 867 if (!buf->output_buf) 868 buf->output_buf = vmalloc(buf->alloc_size); 869 870 if (!buf->output_buf) { 871 ret = -ENOMEM; 872 goto out; 873 } 874 875 ret = buf->fill_func(buf); 876 877 if (ret >= 0) { 878 buf->count = ret; 879 ret = 0; 880 } 881 882 out: 883 return ret; 884 } 885 886 static ssize_t debug_output(struct file *file, char __user *user_buf, 887 size_t len, loff_t *offset) 888 { 889 struct debug_buffer *buf = file->private_data; 890 int ret = 0; 891 892 mutex_lock(&buf->mutex); 893 if (buf->count == 0) { 894 ret = fill_buffer(buf); 895 if (ret != 0) { 896 mutex_unlock(&buf->mutex); 897 goto out; 898 } 899 } 900 mutex_unlock(&buf->mutex); 901 902 ret = simple_read_from_buffer(user_buf, len, offset, 903 buf->output_buf, buf->count); 904 905 out: 906 return ret; 907 908 } 909 910 static int debug_close(struct inode *inode, struct file *file) 911 { 912 struct debug_buffer *buf = file->private_data; 913 914 if (buf) { 915 vfree(buf->output_buf); 916 kfree(buf); 917 } 918 919 return 0; 920 } 921 static int debug_async_open(struct inode *inode, struct file *file) 922 { 923 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); 924 925 return file->private_data ? 0 : -ENOMEM; 926 } 927 928 static int debug_periodic_open(struct inode *inode, struct file *file) 929 { 930 struct debug_buffer *buf; 931 buf = alloc_buffer(inode->i_private, fill_periodic_buffer); 932 if (!buf) 933 return -ENOMEM; 934 935 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; 936 file->private_data = buf; 937 return 0; 938 } 939 940 static int debug_registers_open(struct inode *inode, struct file *file) 941 { 942 file->private_data = alloc_buffer(inode->i_private, 943 fill_registers_buffer); 944 945 return file->private_data ? 0 : -ENOMEM; 946 } 947 948 static inline void create_debug_files (struct ehci_hcd *ehci) 949 { 950 struct usb_bus *bus = &ehci_to_hcd(ehci)->self; 951 952 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); 953 if (!ehci->debug_dir) 954 return; 955 956 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, 957 &debug_async_fops)) 958 goto file_error; 959 960 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, 961 &debug_periodic_fops)) 962 goto file_error; 963 964 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, 965 &debug_registers_fops)) 966 goto file_error; 967 968 return; 969 970 file_error: 971 debugfs_remove_recursive(ehci->debug_dir); 972 } 973 974 static inline void remove_debug_files (struct ehci_hcd *ehci) 975 { 976 debugfs_remove_recursive(ehci->debug_dir); 977 } 978 979 #endif /* STUB_DEBUG_FILES */ 980