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 #define ehci_dbg(ehci, fmt, args...) \ 22 dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) 23 #define ehci_err(ehci, fmt, args...) \ 24 dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) 25 #define ehci_info(ehci, fmt, args...) \ 26 dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) 27 #define ehci_warn(ehci, fmt, args...) \ 28 dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) 29 30 #ifdef EHCI_VERBOSE_DEBUG 31 # define vdbg dbg 32 # define ehci_vdbg ehci_dbg 33 #else 34 # define vdbg(fmt,args...) do { } while (0) 35 # define ehci_vdbg(ehci, fmt, args...) do { } while (0) 36 #endif 37 38 #ifdef DEBUG 39 40 /* check the values in the HCSPARAMS register 41 * (host controller _Structural_ parameters) 42 * see EHCI spec, Table 2-4 for each value 43 */ 44 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label) 45 { 46 u32 params = readl (&ehci->caps->hcs_params); 47 48 ehci_dbg (ehci, 49 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n", 50 label, params, 51 HCS_DEBUG_PORT (params), 52 HCS_INDICATOR (params) ? " ind" : "", 53 HCS_N_CC (params), 54 HCS_N_PCC (params), 55 HCS_PORTROUTED (params) ? "" : " ordered", 56 HCS_PPC (params) ? "" : " !ppc", 57 HCS_N_PORTS (params) 58 ); 59 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */ 60 if (HCS_PORTROUTED (params)) { 61 int i; 62 char buf [46], tmp [7], byte; 63 64 buf[0] = 0; 65 for (i = 0; i < HCS_N_PORTS (params); i++) { 66 // FIXME MIPS won't readb() ... 67 byte = readb (&ehci->caps->portroute[(i>>1)]); 68 sprintf(tmp, "%d ", 69 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf))); 70 strcat(buf, tmp); 71 } 72 ehci_dbg (ehci, "%s portroute %s\n", 73 label, buf); 74 } 75 } 76 #else 77 78 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {} 79 80 #endif 81 82 #ifdef DEBUG 83 84 /* check the values in the HCCPARAMS register 85 * (host controller _Capability_ parameters) 86 * see EHCI Spec, Table 2-5 for each value 87 * */ 88 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label) 89 { 90 u32 params = readl (&ehci->caps->hcc_params); 91 92 if (HCC_ISOC_CACHE (params)) { 93 ehci_dbg (ehci, 94 "%s hcc_params %04x caching frame %s%s%s\n", 95 label, params, 96 HCC_PGM_FRAMELISTLEN (params) ? "256/512/1024" : "1024", 97 HCC_CANPARK (params) ? " park" : "", 98 HCC_64BIT_ADDR (params) ? " 64 bit addr" : ""); 99 } else { 100 ehci_dbg (ehci, 101 "%s hcc_params %04x thresh %d uframes %s%s%s\n", 102 label, 103 params, 104 HCC_ISOC_THRES (params), 105 HCC_PGM_FRAMELISTLEN (params) ? "256/512/1024" : "1024", 106 HCC_CANPARK (params) ? " park" : "", 107 HCC_64BIT_ADDR (params) ? " 64 bit addr" : ""); 108 } 109 } 110 #else 111 112 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {} 113 114 #endif 115 116 #ifdef DEBUG 117 118 static void __attribute__((__unused__)) 119 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd) 120 { 121 ehci_dbg (ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd, 122 le32_to_cpup (&qtd->hw_next), 123 le32_to_cpup (&qtd->hw_alt_next), 124 le32_to_cpup (&qtd->hw_token), 125 le32_to_cpup (&qtd->hw_buf [0])); 126 if (qtd->hw_buf [1]) 127 ehci_dbg (ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n", 128 le32_to_cpup (&qtd->hw_buf [1]), 129 le32_to_cpup (&qtd->hw_buf [2]), 130 le32_to_cpup (&qtd->hw_buf [3]), 131 le32_to_cpup (&qtd->hw_buf [4])); 132 } 133 134 static void __attribute__((__unused__)) 135 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 136 { 137 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label, 138 qh, qh->hw_next, qh->hw_info1, qh->hw_info2, 139 qh->hw_current); 140 dbg_qtd ("overlay", ehci, (struct ehci_qtd *) &qh->hw_qtd_next); 141 } 142 143 static void __attribute__((__unused__)) 144 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd) 145 { 146 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n", 147 label, itd->frame, itd, le32_to_cpu(itd->hw_next), itd->urb); 148 ehci_dbg (ehci, 149 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", 150 le32_to_cpu(itd->hw_transaction[0]), 151 le32_to_cpu(itd->hw_transaction[1]), 152 le32_to_cpu(itd->hw_transaction[2]), 153 le32_to_cpu(itd->hw_transaction[3]), 154 le32_to_cpu(itd->hw_transaction[4]), 155 le32_to_cpu(itd->hw_transaction[5]), 156 le32_to_cpu(itd->hw_transaction[6]), 157 le32_to_cpu(itd->hw_transaction[7])); 158 ehci_dbg (ehci, 159 " buf: %08x %08x %08x %08x %08x %08x %08x\n", 160 le32_to_cpu(itd->hw_bufp[0]), 161 le32_to_cpu(itd->hw_bufp[1]), 162 le32_to_cpu(itd->hw_bufp[2]), 163 le32_to_cpu(itd->hw_bufp[3]), 164 le32_to_cpu(itd->hw_bufp[4]), 165 le32_to_cpu(itd->hw_bufp[5]), 166 le32_to_cpu(itd->hw_bufp[6])); 167 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n", 168 itd->index[0], itd->index[1], itd->index[2], 169 itd->index[3], itd->index[4], itd->index[5], 170 itd->index[6], itd->index[7]); 171 } 172 173 static void __attribute__((__unused__)) 174 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) 175 { 176 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n", 177 label, sitd->frame, sitd, le32_to_cpu(sitd->hw_next), sitd->urb); 178 ehci_dbg (ehci, 179 " addr %08x sched %04x result %08x buf %08x %08x\n", 180 le32_to_cpu(sitd->hw_fullspeed_ep), 181 le32_to_cpu(sitd->hw_uframe), 182 le32_to_cpu(sitd->hw_results), 183 le32_to_cpu(sitd->hw_buf [0]), 184 le32_to_cpu(sitd->hw_buf [1])); 185 } 186 187 static int __attribute__((__unused__)) 188 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 189 { 190 return scnprintf (buf, len, 191 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s", 192 label, label [0] ? " " : "", status, 193 (status & STS_ASS) ? " Async" : "", 194 (status & STS_PSS) ? " Periodic" : "", 195 (status & STS_RECL) ? " Recl" : "", 196 (status & STS_HALT) ? " Halt" : "", 197 (status & STS_IAA) ? " IAA" : "", 198 (status & STS_FATAL) ? " FATAL" : "", 199 (status & STS_FLR) ? " FLR" : "", 200 (status & STS_PCD) ? " PCD" : "", 201 (status & STS_ERR) ? " ERR" : "", 202 (status & STS_INT) ? " INT" : "" 203 ); 204 } 205 206 static int __attribute__((__unused__)) 207 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 208 { 209 return scnprintf (buf, len, 210 "%s%sintrenable %02x%s%s%s%s%s%s", 211 label, label [0] ? " " : "", enable, 212 (enable & STS_IAA) ? " IAA" : "", 213 (enable & STS_FATAL) ? " FATAL" : "", 214 (enable & STS_FLR) ? " FLR" : "", 215 (enable & STS_PCD) ? " PCD" : "", 216 (enable & STS_ERR) ? " ERR" : "", 217 (enable & STS_INT) ? " INT" : "" 218 ); 219 } 220 221 static const char *const fls_strings [] = 222 { "1024", "512", "256", "??" }; 223 224 static int 225 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 226 { 227 return scnprintf (buf, len, 228 "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s", 229 label, label [0] ? " " : "", command, 230 (command & CMD_PARK) ? "park" : "(park)", 231 CMD_PARK_CNT (command), 232 (command >> 16) & 0x3f, 233 (command & CMD_LRESET) ? " LReset" : "", 234 (command & CMD_IAAD) ? " IAAD" : "", 235 (command & CMD_ASE) ? " Async" : "", 236 (command & CMD_PSE) ? " Periodic" : "", 237 fls_strings [(command >> 2) & 0x3], 238 (command & CMD_RESET) ? " Reset" : "", 239 (command & CMD_RUN) ? "RUN" : "HALT" 240 ); 241 } 242 243 static int 244 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 245 { 246 char *sig; 247 248 /* signaling state */ 249 switch (status & (3 << 10)) { 250 case 0 << 10: sig = "se0"; break; 251 case 1 << 10: sig = "k"; break; /* low speed */ 252 case 2 << 10: sig = "j"; break; 253 default: sig = "?"; break; 254 } 255 256 return scnprintf (buf, len, 257 "%s%sport %d status %06x%s%s sig=%s %s%s%s%s%s%s%s%s%s", 258 label, label [0] ? " " : "", port, status, 259 (status & PORT_POWER) ? " POWER" : "", 260 (status & PORT_OWNER) ? " OWNER" : "", 261 sig, 262 (status & PORT_RESET) ? " RESET" : "", 263 (status & PORT_SUSPEND) ? " SUSPEND" : "", 264 (status & PORT_RESUME) ? " RESUME" : "", 265 (status & PORT_OCC) ? " OCC" : "", 266 (status & PORT_OC) ? " OC" : "", 267 (status & PORT_PEC) ? " PEC" : "", 268 (status & PORT_PE) ? " PE" : "", 269 (status & PORT_CSC) ? " CSC" : "", 270 (status & PORT_CONNECT) ? " CONNECT" : "" 271 ); 272 } 273 274 #else 275 static inline void __attribute__((__unused__)) 276 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 277 {} 278 279 static inline int __attribute__((__unused__)) 280 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 281 { return 0; } 282 283 static inline int __attribute__((__unused__)) 284 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 285 { return 0; } 286 287 static inline int __attribute__((__unused__)) 288 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 289 { return 0; } 290 291 static inline int __attribute__((__unused__)) 292 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 293 { return 0; } 294 295 #endif /* DEBUG */ 296 297 /* functions have the "wrong" filename when they're output... */ 298 #define dbg_status(ehci, label, status) { \ 299 char _buf [80]; \ 300 dbg_status_buf (_buf, sizeof _buf, label, status); \ 301 ehci_dbg (ehci, "%s\n", _buf); \ 302 } 303 304 #define dbg_cmd(ehci, label, command) { \ 305 char _buf [80]; \ 306 dbg_command_buf (_buf, sizeof _buf, label, command); \ 307 ehci_dbg (ehci, "%s\n", _buf); \ 308 } 309 310 #define dbg_port(ehci, label, port, status) { \ 311 char _buf [80]; \ 312 dbg_port_buf (_buf, sizeof _buf, label, port, status); \ 313 ehci_dbg (ehci, "%s\n", _buf); \ 314 } 315 316 /*-------------------------------------------------------------------------*/ 317 318 #ifdef STUB_DEBUG_FILES 319 320 static inline void create_debug_files (struct ehci_hcd *bus) { } 321 static inline void remove_debug_files (struct ehci_hcd *bus) { } 322 323 #else 324 325 /* troubleshooting help: expose state in driverfs */ 326 327 #define speed_char(info1) ({ char tmp; \ 328 switch (info1 & (3 << 12)) { \ 329 case 0 << 12: tmp = 'f'; break; \ 330 case 1 << 12: tmp = 'l'; break; \ 331 case 2 << 12: tmp = 'h'; break; \ 332 default: tmp = '?'; break; \ 333 }; tmp; }) 334 335 static inline char token_mark (__le32 token) 336 { 337 __u32 v = le32_to_cpu (token); 338 if (v & QTD_STS_ACTIVE) 339 return '*'; 340 if (v & QTD_STS_HALT) 341 return '-'; 342 if (!IS_SHORT_READ (v)) 343 return ' '; 344 /* tries to advance through hw_alt_next */ 345 return '/'; 346 } 347 348 static void qh_lines ( 349 struct ehci_hcd *ehci, 350 struct ehci_qh *qh, 351 char **nextp, 352 unsigned *sizep 353 ) 354 { 355 u32 scratch; 356 u32 hw_curr; 357 struct list_head *entry; 358 struct ehci_qtd *td; 359 unsigned temp; 360 unsigned size = *sizep; 361 char *next = *nextp; 362 char mark; 363 364 if (qh->hw_qtd_next == EHCI_LIST_END) /* NEC does this */ 365 mark = '@'; 366 else 367 mark = token_mark (qh->hw_token); 368 if (mark == '/') { /* qh_alt_next controls qh advance? */ 369 if ((qh->hw_alt_next & QTD_MASK) == ehci->async->hw_alt_next) 370 mark = '#'; /* blocked */ 371 else if (qh->hw_alt_next == EHCI_LIST_END) 372 mark = '.'; /* use hw_qtd_next */ 373 /* else alt_next points to some other qtd */ 374 } 375 scratch = le32_to_cpup (&qh->hw_info1); 376 hw_curr = (mark == '*') ? le32_to_cpup (&qh->hw_current) : 0; 377 temp = scnprintf (next, size, 378 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)", 379 qh, scratch & 0x007f, 380 speed_char (scratch), 381 (scratch >> 8) & 0x000f, 382 scratch, le32_to_cpup (&qh->hw_info2), 383 le32_to_cpup (&qh->hw_token), mark, 384 (__constant_cpu_to_le32 (QTD_TOGGLE) & qh->hw_token) 385 ? "data1" : "data0", 386 (le32_to_cpup (&qh->hw_alt_next) >> 1) & 0x0f); 387 size -= temp; 388 next += temp; 389 390 /* hc may be modifying the list as we read it ... */ 391 list_for_each (entry, &qh->qtd_list) { 392 td = list_entry (entry, struct ehci_qtd, qtd_list); 393 scratch = le32_to_cpup (&td->hw_token); 394 mark = ' '; 395 if (hw_curr == td->qtd_dma) 396 mark = '*'; 397 else if (qh->hw_qtd_next == cpu_to_le32(td->qtd_dma)) 398 mark = '+'; 399 else if (QTD_LENGTH (scratch)) { 400 if (td->hw_alt_next == ehci->async->hw_alt_next) 401 mark = '#'; 402 else if (td->hw_alt_next != EHCI_LIST_END) 403 mark = '/'; 404 } 405 temp = snprintf (next, size, 406 "\n\t%p%c%s len=%d %08x urb %p", 407 td, mark, ({ char *tmp; 408 switch ((scratch>>8)&0x03) { 409 case 0: tmp = "out"; break; 410 case 1: tmp = "in"; break; 411 case 2: tmp = "setup"; break; 412 default: tmp = "?"; break; 413 } tmp;}), 414 (scratch >> 16) & 0x7fff, 415 scratch, 416 td->urb); 417 if (temp < 0) 418 temp = 0; 419 else if (size < temp) 420 temp = size; 421 size -= temp; 422 next += temp; 423 if (temp == size) 424 goto done; 425 } 426 427 temp = snprintf (next, size, "\n"); 428 if (temp < 0) 429 temp = 0; 430 else if (size < temp) 431 temp = size; 432 size -= temp; 433 next += temp; 434 435 done: 436 *sizep = size; 437 *nextp = next; 438 } 439 440 static ssize_t 441 show_async (struct class_device *class_dev, char *buf) 442 { 443 struct usb_bus *bus; 444 struct usb_hcd *hcd; 445 struct ehci_hcd *ehci; 446 unsigned long flags; 447 unsigned temp, size; 448 char *next; 449 struct ehci_qh *qh; 450 451 *buf = 0; 452 453 bus = class_get_devdata(class_dev); 454 hcd = bus->hcpriv; 455 ehci = hcd_to_ehci (hcd); 456 next = buf; 457 size = PAGE_SIZE; 458 459 /* dumps a snapshot of the async schedule. 460 * usually empty except for long-term bulk reads, or head. 461 * one QH per line, and TDs we know about 462 */ 463 spin_lock_irqsave (&ehci->lock, flags); 464 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) 465 qh_lines (ehci, qh, &next, &size); 466 if (ehci->reclaim && size > 0) { 467 temp = scnprintf (next, size, "\nreclaim =\n"); 468 size -= temp; 469 next += temp; 470 471 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim) 472 qh_lines (ehci, qh, &next, &size); 473 } 474 spin_unlock_irqrestore (&ehci->lock, flags); 475 476 return strlen (buf); 477 } 478 static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL); 479 480 #define DBG_SCHED_LIMIT 64 481 482 static ssize_t 483 show_periodic (struct class_device *class_dev, char *buf) 484 { 485 struct usb_bus *bus; 486 struct usb_hcd *hcd; 487 struct ehci_hcd *ehci; 488 unsigned long flags; 489 union ehci_shadow p, *seen; 490 unsigned temp, size, seen_count; 491 char *next; 492 unsigned i; 493 __le32 tag; 494 495 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, SLAB_ATOMIC))) 496 return 0; 497 seen_count = 0; 498 499 bus = class_get_devdata(class_dev); 500 hcd = bus->hcpriv; 501 ehci = hcd_to_ehci (hcd); 502 next = buf; 503 size = PAGE_SIZE; 504 505 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); 506 size -= temp; 507 next += temp; 508 509 /* dump a snapshot of the periodic schedule. 510 * iso changes, interrupt usually doesn't. 511 */ 512 spin_lock_irqsave (&ehci->lock, flags); 513 for (i = 0; i < ehci->periodic_size; i++) { 514 p = ehci->pshadow [i]; 515 if (likely (!p.ptr)) 516 continue; 517 tag = Q_NEXT_TYPE (ehci->periodic [i]); 518 519 temp = scnprintf (next, size, "%4d: ", i); 520 size -= temp; 521 next += temp; 522 523 do { 524 switch (tag) { 525 case Q_TYPE_QH: 526 temp = scnprintf (next, size, " qh%d-%04x/%p", 527 p.qh->period, 528 le32_to_cpup (&p.qh->hw_info2) 529 /* uframe masks */ 530 & 0xffff, 531 p.qh); 532 size -= temp; 533 next += temp; 534 /* don't repeat what follows this qh */ 535 for (temp = 0; temp < seen_count; temp++) { 536 if (seen [temp].ptr != p.ptr) 537 continue; 538 if (p.qh->qh_next.ptr) 539 temp = scnprintf (next, size, 540 " ..."); 541 p.ptr = NULL; 542 break; 543 } 544 /* show more info the first time around */ 545 if (temp == seen_count && p.ptr) { 546 u32 scratch = le32_to_cpup ( 547 &p.qh->hw_info1); 548 struct ehci_qtd *qtd; 549 char *type = ""; 550 551 /* count tds, get ep direction */ 552 temp = 0; 553 list_for_each_entry (qtd, 554 &p.qh->qtd_list, 555 qtd_list) { 556 temp++; 557 switch (0x03 & (le32_to_cpu ( 558 qtd->hw_token) >> 8)) { 559 case 0: type = "out"; continue; 560 case 1: type = "in"; continue; 561 } 562 } 563 564 temp = scnprintf (next, size, 565 " (%c%d ep%d%s " 566 "[%d/%d] q%d p%d)", 567 speed_char (scratch), 568 scratch & 0x007f, 569 (scratch >> 8) & 0x000f, type, 570 p.qh->usecs, p.qh->c_usecs, 571 temp, 572 0x7ff & (scratch >> 16)); 573 574 if (seen_count < DBG_SCHED_LIMIT) 575 seen [seen_count++].qh = p.qh; 576 } else 577 temp = 0; 578 if (p.qh) { 579 tag = Q_NEXT_TYPE (p.qh->hw_next); 580 p = p.qh->qh_next; 581 } 582 break; 583 case Q_TYPE_FSTN: 584 temp = scnprintf (next, size, 585 " fstn-%8x/%p", p.fstn->hw_prev, 586 p.fstn); 587 tag = Q_NEXT_TYPE (p.fstn->hw_next); 588 p = p.fstn->fstn_next; 589 break; 590 case Q_TYPE_ITD: 591 temp = scnprintf (next, size, 592 " itd/%p", p.itd); 593 tag = Q_NEXT_TYPE (p.itd->hw_next); 594 p = p.itd->itd_next; 595 break; 596 case Q_TYPE_SITD: 597 temp = scnprintf (next, size, 598 " sitd%d-%04x/%p", 599 p.sitd->stream->interval, 600 le32_to_cpup (&p.sitd->hw_uframe) 601 & 0x0000ffff, 602 p.sitd); 603 tag = Q_NEXT_TYPE (p.sitd->hw_next); 604 p = p.sitd->sitd_next; 605 break; 606 } 607 size -= temp; 608 next += temp; 609 } while (p.ptr); 610 611 temp = scnprintf (next, size, "\n"); 612 size -= temp; 613 next += temp; 614 } 615 spin_unlock_irqrestore (&ehci->lock, flags); 616 kfree (seen); 617 618 return PAGE_SIZE - size; 619 } 620 static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL); 621 622 #undef DBG_SCHED_LIMIT 623 624 static ssize_t 625 show_registers (struct class_device *class_dev, char *buf) 626 { 627 struct usb_bus *bus; 628 struct usb_hcd *hcd; 629 struct ehci_hcd *ehci; 630 unsigned long flags; 631 unsigned temp, size, i; 632 char *next, scratch [80]; 633 static char fmt [] = "%*s\n"; 634 static char label [] = ""; 635 636 bus = class_get_devdata(class_dev); 637 hcd = bus->hcpriv; 638 ehci = hcd_to_ehci (hcd); 639 next = buf; 640 size = PAGE_SIZE; 641 642 spin_lock_irqsave (&ehci->lock, flags); 643 644 if (bus->controller->power.power_state) { 645 size = scnprintf (next, size, 646 "bus %s, device %s (driver " DRIVER_VERSION ")\n" 647 "SUSPENDED (no register access)\n", 648 hcd->self.controller->bus->name, 649 hcd->self.controller->bus_id); 650 goto done; 651 } 652 653 /* Capability Registers */ 654 i = HC_VERSION(readl (&ehci->caps->hc_capbase)); 655 temp = scnprintf (next, size, 656 "bus %s, device %s (driver " DRIVER_VERSION ")\n" 657 "EHCI %x.%02x, hcd state %d\n", 658 hcd->self.controller->bus->name, 659 hcd->self.controller->bus_id, 660 i >> 8, i & 0x0ff, hcd->state); 661 size -= temp; 662 next += temp; 663 664 // FIXME interpret both types of params 665 i = readl (&ehci->caps->hcs_params); 666 temp = scnprintf (next, size, "structural params 0x%08x\n", i); 667 size -= temp; 668 next += temp; 669 670 i = readl (&ehci->caps->hcc_params); 671 temp = scnprintf (next, size, "capability params 0x%08x\n", i); 672 size -= temp; 673 next += temp; 674 675 /* Operational Registers */ 676 temp = dbg_status_buf (scratch, sizeof scratch, label, 677 readl (&ehci->regs->status)); 678 temp = scnprintf (next, size, fmt, temp, scratch); 679 size -= temp; 680 next += temp; 681 682 temp = dbg_command_buf (scratch, sizeof scratch, label, 683 readl (&ehci->regs->command)); 684 temp = scnprintf (next, size, fmt, temp, scratch); 685 size -= temp; 686 next += temp; 687 688 temp = dbg_intr_buf (scratch, sizeof scratch, label, 689 readl (&ehci->regs->intr_enable)); 690 temp = scnprintf (next, size, fmt, temp, scratch); 691 size -= temp; 692 next += temp; 693 694 temp = scnprintf (next, size, "uframe %04x\n", 695 readl (&ehci->regs->frame_index)); 696 size -= temp; 697 next += temp; 698 699 for (i = 0; i < HCS_N_PORTS (ehci->hcs_params); i++) { 700 temp = dbg_port_buf (scratch, sizeof scratch, label, i + 1, 701 readl (&ehci->regs->port_status [i])); 702 temp = scnprintf (next, size, fmt, temp, scratch); 703 size -= temp; 704 next += temp; 705 } 706 707 if (ehci->reclaim) { 708 temp = scnprintf (next, size, "reclaim qh %p%s\n", 709 ehci->reclaim, 710 ehci->reclaim_ready ? " ready" : ""); 711 size -= temp; 712 next += temp; 713 } 714 715 #ifdef EHCI_STATS 716 temp = scnprintf (next, size, 717 "irq normal %ld err %ld reclaim %ld (lost %ld)\n", 718 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, 719 ehci->stats.lost_iaa); 720 size -= temp; 721 next += temp; 722 723 temp = scnprintf (next, size, "complete %ld unlink %ld\n", 724 ehci->stats.complete, ehci->stats.unlink); 725 size -= temp; 726 next += temp; 727 #endif 728 729 done: 730 spin_unlock_irqrestore (&ehci->lock, flags); 731 732 return PAGE_SIZE - size; 733 } 734 static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL); 735 736 static inline void create_debug_files (struct ehci_hcd *ehci) 737 { 738 struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev; 739 740 class_device_create_file(cldev, &class_device_attr_async); 741 class_device_create_file(cldev, &class_device_attr_periodic); 742 class_device_create_file(cldev, &class_device_attr_registers); 743 } 744 745 static inline void remove_debug_files (struct ehci_hcd *ehci) 746 { 747 struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev; 748 749 class_device_remove_file(cldev, &class_device_attr_async); 750 class_device_remove_file(cldev, &class_device_attr_periodic); 751 class_device_remove_file(cldev, &class_device_attr_registers); 752 } 753 754 #endif /* STUB_DEBUG_FILES */ 755 756