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 VERBOSE_DEBUG 31# define ehci_vdbg ehci_dbg 32#else 33 static inline void ehci_vdbg(struct ehci_hcd *ehci, ...) {} 34#endif 35 36#ifdef DEBUG 37 38/* check the values in the HCSPARAMS register 39 * (host controller _Structural_ parameters) 40 * see EHCI spec, Table 2-4 for each value 41 */ 42static void dbg_hcs_params (struct ehci_hcd *ehci, char *label) 43{ 44 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params); 45 46 ehci_dbg (ehci, 47 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n", 48 label, params, 49 HCS_DEBUG_PORT (params), 50 HCS_INDICATOR (params) ? " ind" : "", 51 HCS_N_CC (params), 52 HCS_N_PCC (params), 53 HCS_PORTROUTED (params) ? "" : " ordered", 54 HCS_PPC (params) ? "" : " !ppc", 55 HCS_N_PORTS (params) 56 ); 57 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */ 58 if (HCS_PORTROUTED (params)) { 59 int i; 60 char buf [46], tmp [7], byte; 61 62 buf[0] = 0; 63 for (i = 0; i < HCS_N_PORTS (params); i++) { 64 // FIXME MIPS won't readb() ... 65 byte = readb (&ehci->caps->portroute[(i>>1)]); 66 sprintf(tmp, "%d ", 67 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf))); 68 strcat(buf, tmp); 69 } 70 ehci_dbg (ehci, "%s portroute %s\n", 71 label, buf); 72 } 73} 74#else 75 76static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {} 77 78#endif 79 80#ifdef DEBUG 81 82/* check the values in the HCCPARAMS register 83 * (host controller _Capability_ parameters) 84 * see EHCI Spec, Table 2-5 for each value 85 * */ 86static void dbg_hcc_params (struct ehci_hcd *ehci, char *label) 87{ 88 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params); 89 90 if (HCC_ISOC_CACHE (params)) { 91 ehci_dbg (ehci, 92 "%s hcc_params %04x caching frame %s%s%s\n", 93 label, params, 94 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", 95 HCC_CANPARK(params) ? " park" : "", 96 HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); 97 } else { 98 ehci_dbg (ehci, 99 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n", 100 label, 101 params, 102 HCC_ISOC_THRES(params), 103 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", 104 HCC_CANPARK(params) ? " park" : "", 105 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "", 106 HCC_LPM(params) ? " LPM" : "", 107 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "", 108 HCC_HW_PREFETCH(params) ? " hw prefetch" : "", 109 HCC_32FRAME_PERIODIC_LIST(params) ? 110 " 32 periodic list" : ""); 111 } 112} 113#else 114 115static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {} 116 117#endif 118 119#ifdef DEBUG 120 121static void __maybe_unused 122dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd) 123{ 124 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd, 125 hc32_to_cpup(ehci, &qtd->hw_next), 126 hc32_to_cpup(ehci, &qtd->hw_alt_next), 127 hc32_to_cpup(ehci, &qtd->hw_token), 128 hc32_to_cpup(ehci, &qtd->hw_buf [0])); 129 if (qtd->hw_buf [1]) 130 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n", 131 hc32_to_cpup(ehci, &qtd->hw_buf[1]), 132 hc32_to_cpup(ehci, &qtd->hw_buf[2]), 133 hc32_to_cpup(ehci, &qtd->hw_buf[3]), 134 hc32_to_cpup(ehci, &qtd->hw_buf[4])); 135} 136 137static void __maybe_unused 138dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 139{ 140 struct ehci_qh_hw *hw = qh->hw; 141 142 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label, 143 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current); 144 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next); 145} 146 147static void __maybe_unused 148dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd) 149{ 150 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n", 151 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next), 152 itd->urb); 153 ehci_dbg (ehci, 154 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", 155 hc32_to_cpu(ehci, itd->hw_transaction[0]), 156 hc32_to_cpu(ehci, itd->hw_transaction[1]), 157 hc32_to_cpu(ehci, itd->hw_transaction[2]), 158 hc32_to_cpu(ehci, itd->hw_transaction[3]), 159 hc32_to_cpu(ehci, itd->hw_transaction[4]), 160 hc32_to_cpu(ehci, itd->hw_transaction[5]), 161 hc32_to_cpu(ehci, itd->hw_transaction[6]), 162 hc32_to_cpu(ehci, itd->hw_transaction[7])); 163 ehci_dbg (ehci, 164 " buf: %08x %08x %08x %08x %08x %08x %08x\n", 165 hc32_to_cpu(ehci, itd->hw_bufp[0]), 166 hc32_to_cpu(ehci, itd->hw_bufp[1]), 167 hc32_to_cpu(ehci, itd->hw_bufp[2]), 168 hc32_to_cpu(ehci, itd->hw_bufp[3]), 169 hc32_to_cpu(ehci, itd->hw_bufp[4]), 170 hc32_to_cpu(ehci, itd->hw_bufp[5]), 171 hc32_to_cpu(ehci, itd->hw_bufp[6])); 172 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n", 173 itd->index[0], itd->index[1], itd->index[2], 174 itd->index[3], itd->index[4], itd->index[5], 175 itd->index[6], itd->index[7]); 176} 177 178static void __maybe_unused 179dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) 180{ 181 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n", 182 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next), 183 sitd->urb); 184 ehci_dbg (ehci, 185 " addr %08x sched %04x result %08x buf %08x %08x\n", 186 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep), 187 hc32_to_cpu(ehci, sitd->hw_uframe), 188 hc32_to_cpu(ehci, sitd->hw_results), 189 hc32_to_cpu(ehci, sitd->hw_buf[0]), 190 hc32_to_cpu(ehci, sitd->hw_buf[1])); 191} 192 193static int __maybe_unused 194dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 195{ 196 return scnprintf (buf, len, 197 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s", 198 label, label [0] ? " " : "", status, 199 (status & STS_PPCE_MASK) ? " PPCE" : "", 200 (status & STS_ASS) ? " Async" : "", 201 (status & STS_PSS) ? " Periodic" : "", 202 (status & STS_RECL) ? " Recl" : "", 203 (status & STS_HALT) ? " Halt" : "", 204 (status & STS_IAA) ? " IAA" : "", 205 (status & STS_FATAL) ? " FATAL" : "", 206 (status & STS_FLR) ? " FLR" : "", 207 (status & STS_PCD) ? " PCD" : "", 208 (status & STS_ERR) ? " ERR" : "", 209 (status & STS_INT) ? " INT" : "" 210 ); 211} 212 213static int __maybe_unused 214dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 215{ 216 return scnprintf (buf, len, 217 "%s%sintrenable %02x%s%s%s%s%s%s%s", 218 label, label [0] ? " " : "", enable, 219 (enable & STS_PPCE_MASK) ? " PPCE" : "", 220 (enable & STS_IAA) ? " IAA" : "", 221 (enable & STS_FATAL) ? " FATAL" : "", 222 (enable & STS_FLR) ? " FLR" : "", 223 (enable & STS_PCD) ? " PCD" : "", 224 (enable & STS_ERR) ? " ERR" : "", 225 (enable & STS_INT) ? " INT" : "" 226 ); 227} 228 229static const char *const fls_strings [] = 230 { "1024", "512", "256", "??" }; 231 232static int 233dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 234{ 235 return scnprintf (buf, len, 236 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s " 237 "period=%s%s %s", 238 label, label [0] ? " " : "", command, 239 (command & CMD_HIRD) ? " HIRD" : "", 240 (command & CMD_PPCEE) ? " PPCEE" : "", 241 (command & CMD_FSP) ? " FSP" : "", 242 (command & CMD_ASPE) ? " ASPE" : "", 243 (command & CMD_PSPE) ? " PSPE" : "", 244 (command & CMD_PARK) ? " park" : "(park)", 245 CMD_PARK_CNT (command), 246 (command >> 16) & 0x3f, 247 (command & CMD_LRESET) ? " LReset" : "", 248 (command & CMD_IAAD) ? " IAAD" : "", 249 (command & CMD_ASE) ? " Async" : "", 250 (command & CMD_PSE) ? " Periodic" : "", 251 fls_strings [(command >> 2) & 0x3], 252 (command & CMD_RESET) ? " Reset" : "", 253 (command & CMD_RUN) ? "RUN" : "HALT" 254 ); 255} 256 257static int 258dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 259{ 260 char *sig; 261 262 /* signaling state */ 263 switch (status & (3 << 10)) { 264 case 0 << 10: sig = "se0"; break; 265 case 1 << 10: sig = "k"; break; /* low speed */ 266 case 2 << 10: sig = "j"; break; 267 default: sig = "?"; break; 268 } 269 270 return scnprintf (buf, len, 271 "%s%sport:%d status %06x %d %s%s%s%s%s%s " 272 "sig=%s%s%s%s%s%s%s%s%s%s%s", 273 label, label [0] ? " " : "", port, status, 274 status>>25,/*device address */ 275 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ? 276 " ACK" : "", 277 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ? 278 " NYET" : "", 279 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ? 280 " STALL" : "", 281 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ? 282 " ERR" : "", 283 (status & PORT_POWER) ? " POWER" : "", 284 (status & PORT_OWNER) ? " OWNER" : "", 285 sig, 286 (status & PORT_LPM) ? " LPM" : "", 287 (status & PORT_RESET) ? " RESET" : "", 288 (status & PORT_SUSPEND) ? " SUSPEND" : "", 289 (status & PORT_RESUME) ? " RESUME" : "", 290 (status & PORT_OCC) ? " OCC" : "", 291 (status & PORT_OC) ? " OC" : "", 292 (status & PORT_PEC) ? " PEC" : "", 293 (status & PORT_PE) ? " PE" : "", 294 (status & PORT_CSC) ? " CSC" : "", 295 (status & PORT_CONNECT) ? " CONNECT" : ""); 296} 297 298#else 299static inline void __maybe_unused 300dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 301{} 302 303static inline int __maybe_unused 304dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 305{ return 0; } 306 307static inline int __maybe_unused 308dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 309{ return 0; } 310 311static inline int __maybe_unused 312dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 313{ return 0; } 314 315static inline int __maybe_unused 316dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) 317{ return 0; } 318 319#endif /* DEBUG */ 320 321/* functions have the "wrong" filename when they're output... */ 322#define dbg_status(ehci, label, status) { \ 323 char _buf [80]; \ 324 dbg_status_buf (_buf, sizeof _buf, label, status); \ 325 ehci_dbg (ehci, "%s\n", _buf); \ 326} 327 328#define dbg_cmd(ehci, label, command) { \ 329 char _buf [80]; \ 330 dbg_command_buf (_buf, sizeof _buf, label, command); \ 331 ehci_dbg (ehci, "%s\n", _buf); \ 332} 333 334#define dbg_port(ehci, label, port, status) { \ 335 char _buf [80]; \ 336 dbg_port_buf (_buf, sizeof _buf, label, port, status); \ 337 ehci_dbg (ehci, "%s\n", _buf); \ 338} 339 340/*-------------------------------------------------------------------------*/ 341 342#ifdef STUB_DEBUG_FILES 343 344static inline void create_debug_files (struct ehci_hcd *bus) { } 345static inline void remove_debug_files (struct ehci_hcd *bus) { } 346 347#else 348 349/* troubleshooting help: expose state in debugfs */ 350 351static int debug_async_open(struct inode *, struct file *); 352static int debug_periodic_open(struct inode *, struct file *); 353static int debug_registers_open(struct inode *, struct file *); 354static int debug_async_open(struct inode *, struct file *); 355static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, 356 size_t count, loff_t *ppos); 357static ssize_t debug_lpm_write(struct file *file, const char __user *buffer, 358 size_t count, loff_t *ppos); 359static int debug_lpm_close(struct inode *inode, struct file *file); 360 361static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); 362static int debug_close(struct inode *, struct file *); 363 364static const struct file_operations debug_async_fops = { 365 .owner = THIS_MODULE, 366 .open = debug_async_open, 367 .read = debug_output, 368 .release = debug_close, 369 .llseek = default_llseek, 370}; 371static const struct file_operations debug_periodic_fops = { 372 .owner = THIS_MODULE, 373 .open = debug_periodic_open, 374 .read = debug_output, 375 .release = debug_close, 376 .llseek = default_llseek, 377}; 378static const struct file_operations debug_registers_fops = { 379 .owner = THIS_MODULE, 380 .open = debug_registers_open, 381 .read = debug_output, 382 .release = debug_close, 383 .llseek = default_llseek, 384}; 385static const struct file_operations debug_lpm_fops = { 386 .owner = THIS_MODULE, 387 .open = simple_open, 388 .read = debug_lpm_read, 389 .write = debug_lpm_write, 390 .release = debug_lpm_close, 391 .llseek = noop_llseek, 392}; 393 394static struct dentry *ehci_debug_root; 395 396struct debug_buffer { 397 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ 398 struct usb_bus *bus; 399 struct mutex mutex; /* protect filling of buffer */ 400 size_t count; /* number of characters filled into buffer */ 401 char *output_buf; 402 size_t alloc_size; 403}; 404 405#define speed_char(info1) ({ char tmp; \ 406 switch (info1 & (3 << 12)) { \ 407 case 0 << 12: tmp = 'f'; break; \ 408 case 1 << 12: tmp = 'l'; break; \ 409 case 2 << 12: tmp = 'h'; break; \ 410 default: tmp = '?'; break; \ 411 }; tmp; }) 412 413static inline char token_mark(struct ehci_hcd *ehci, __hc32 token) 414{ 415 __u32 v = hc32_to_cpu(ehci, token); 416 417 if (v & QTD_STS_ACTIVE) 418 return '*'; 419 if (v & QTD_STS_HALT) 420 return '-'; 421 if (!IS_SHORT_READ (v)) 422 return ' '; 423 /* tries to advance through hw_alt_next */ 424 return '/'; 425} 426 427static void qh_lines ( 428 struct ehci_hcd *ehci, 429 struct ehci_qh *qh, 430 char **nextp, 431 unsigned *sizep 432) 433{ 434 u32 scratch; 435 u32 hw_curr; 436 struct list_head *entry; 437 struct ehci_qtd *td; 438 unsigned temp; 439 unsigned size = *sizep; 440 char *next = *nextp; 441 char mark; 442 __le32 list_end = EHCI_LIST_END(ehci); 443 struct ehci_qh_hw *hw = qh->hw; 444 445 if (hw->hw_qtd_next == list_end) /* NEC does this */ 446 mark = '@'; 447 else 448 mark = token_mark(ehci, hw->hw_token); 449 if (mark == '/') { /* qh_alt_next controls qh advance? */ 450 if ((hw->hw_alt_next & QTD_MASK(ehci)) 451 == ehci->async->hw->hw_alt_next) 452 mark = '#'; /* blocked */ 453 else if (hw->hw_alt_next == list_end) 454 mark = '.'; /* use hw_qtd_next */ 455 /* else alt_next points to some other qtd */ 456 } 457 scratch = hc32_to_cpup(ehci, &hw->hw_info1); 458 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0; 459 temp = scnprintf (next, size, 460 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)", 461 qh, scratch & 0x007f, 462 speed_char (scratch), 463 (scratch >> 8) & 0x000f, 464 scratch, hc32_to_cpup(ehci, &hw->hw_info2), 465 hc32_to_cpup(ehci, &hw->hw_token), mark, 466 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) 467 ? "data1" : "data0", 468 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f); 469 size -= temp; 470 next += temp; 471 472 /* hc may be modifying the list as we read it ... */ 473 list_for_each (entry, &qh->qtd_list) { 474 td = list_entry (entry, struct ehci_qtd, qtd_list); 475 scratch = hc32_to_cpup(ehci, &td->hw_token); 476 mark = ' '; 477 if (hw_curr == td->qtd_dma) 478 mark = '*'; 479 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) 480 mark = '+'; 481 else if (QTD_LENGTH (scratch)) { 482 if (td->hw_alt_next == ehci->async->hw->hw_alt_next) 483 mark = '#'; 484 else if (td->hw_alt_next != list_end) 485 mark = '/'; 486 } 487 temp = snprintf (next, size, 488 "\n\t%p%c%s len=%d %08x urb %p", 489 td, mark, ({ char *tmp; 490 switch ((scratch>>8)&0x03) { 491 case 0: tmp = "out"; break; 492 case 1: tmp = "in"; break; 493 case 2: tmp = "setup"; break; 494 default: tmp = "?"; break; 495 } tmp;}), 496 (scratch >> 16) & 0x7fff, 497 scratch, 498 td->urb); 499 if (size < temp) 500 temp = size; 501 size -= temp; 502 next += temp; 503 if (temp == size) 504 goto done; 505 } 506 507 temp = snprintf (next, size, "\n"); 508 if (size < temp) 509 temp = size; 510 size -= temp; 511 next += temp; 512 513done: 514 *sizep = size; 515 *nextp = next; 516} 517 518static ssize_t fill_async_buffer(struct debug_buffer *buf) 519{ 520 struct usb_hcd *hcd; 521 struct ehci_hcd *ehci; 522 unsigned long flags; 523 unsigned temp, size; 524 char *next; 525 struct ehci_qh *qh; 526 527 hcd = bus_to_hcd(buf->bus); 528 ehci = hcd_to_ehci (hcd); 529 next = buf->output_buf; 530 size = buf->alloc_size; 531 532 *next = 0; 533 534 /* dumps a snapshot of the async schedule. 535 * usually empty except for long-term bulk reads, or head. 536 * one QH per line, and TDs we know about 537 */ 538 spin_lock_irqsave (&ehci->lock, flags); 539 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) 540 qh_lines (ehci, qh, &next, &size); 541 if (ehci->reclaim && size > 0) { 542 temp = scnprintf (next, size, "\nreclaim =\n"); 543 size -= temp; 544 next += temp; 545 546 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim) 547 qh_lines (ehci, qh, &next, &size); 548 } 549 spin_unlock_irqrestore (&ehci->lock, flags); 550 551 return strlen(buf->output_buf); 552} 553 554#define DBG_SCHED_LIMIT 64 555static ssize_t fill_periodic_buffer(struct debug_buffer *buf) 556{ 557 struct usb_hcd *hcd; 558 struct ehci_hcd *ehci; 559 unsigned long flags; 560 union ehci_shadow p, *seen; 561 unsigned temp, size, seen_count; 562 char *next; 563 unsigned i; 564 __hc32 tag; 565 566 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) 567 return 0; 568 seen_count = 0; 569 570 hcd = bus_to_hcd(buf->bus); 571 ehci = hcd_to_ehci (hcd); 572 next = buf->output_buf; 573 size = buf->alloc_size; 574 575 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); 576 size -= temp; 577 next += temp; 578 579 /* dump a snapshot of the periodic schedule. 580 * iso changes, interrupt usually doesn't. 581 */ 582 spin_lock_irqsave (&ehci->lock, flags); 583 for (i = 0; i < ehci->periodic_size; i++) { 584 p = ehci->pshadow [i]; 585 if (likely (!p.ptr)) 586 continue; 587 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); 588 589 temp = scnprintf (next, size, "%4d: ", i); 590 size -= temp; 591 next += temp; 592 593 do { 594 struct ehci_qh_hw *hw; 595 596 switch (hc32_to_cpu(ehci, tag)) { 597 case Q_TYPE_QH: 598 hw = p.qh->hw; 599 temp = scnprintf (next, size, " qh%d-%04x/%p", 600 p.qh->period, 601 hc32_to_cpup(ehci, 602 &hw->hw_info2) 603 /* uframe masks */ 604 & (QH_CMASK | QH_SMASK), 605 p.qh); 606 size -= temp; 607 next += temp; 608 /* don't repeat what follows this qh */ 609 for (temp = 0; temp < seen_count; temp++) { 610 if (seen [temp].ptr != p.ptr) 611 continue; 612 if (p.qh->qh_next.ptr) { 613 temp = scnprintf (next, size, 614 " ..."); 615 size -= temp; 616 next += temp; 617 } 618 break; 619 } 620 /* show more info the first time around */ 621 if (temp == seen_count) { 622 u32 scratch = hc32_to_cpup(ehci, 623 &hw->hw_info1); 624 struct ehci_qtd *qtd; 625 char *type = ""; 626 627 /* count tds, get ep direction */ 628 temp = 0; 629 list_for_each_entry (qtd, 630 &p.qh->qtd_list, 631 qtd_list) { 632 temp++; 633 switch (0x03 & (hc32_to_cpu( 634 ehci, 635 qtd->hw_token) >> 8)) { 636 case 0: type = "out"; continue; 637 case 1: type = "in"; continue; 638 } 639 } 640 641 temp = scnprintf (next, size, 642 " (%c%d ep%d%s " 643 "[%d/%d] q%d p%d)", 644 speed_char (scratch), 645 scratch & 0x007f, 646 (scratch >> 8) & 0x000f, type, 647 p.qh->usecs, p.qh->c_usecs, 648 temp, 649 0x7ff & (scratch >> 16)); 650 651 if (seen_count < DBG_SCHED_LIMIT) 652 seen [seen_count++].qh = p.qh; 653 } else 654 temp = 0; 655 if (p.qh) { 656 tag = Q_NEXT_TYPE(ehci, hw->hw_next); 657 p = p.qh->qh_next; 658 } 659 break; 660 case Q_TYPE_FSTN: 661 temp = scnprintf (next, size, 662 " fstn-%8x/%p", p.fstn->hw_prev, 663 p.fstn); 664 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); 665 p = p.fstn->fstn_next; 666 break; 667 case Q_TYPE_ITD: 668 temp = scnprintf (next, size, 669 " itd/%p", p.itd); 670 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); 671 p = p.itd->itd_next; 672 break; 673 case Q_TYPE_SITD: 674 temp = scnprintf (next, size, 675 " sitd%d-%04x/%p", 676 p.sitd->stream->interval, 677 hc32_to_cpup(ehci, &p.sitd->hw_uframe) 678 & 0x0000ffff, 679 p.sitd); 680 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); 681 p = p.sitd->sitd_next; 682 break; 683 } 684 size -= temp; 685 next += temp; 686 } while (p.ptr); 687 688 temp = scnprintf (next, size, "\n"); 689 size -= temp; 690 next += temp; 691 } 692 spin_unlock_irqrestore (&ehci->lock, flags); 693 kfree (seen); 694 695 return buf->alloc_size - size; 696} 697#undef DBG_SCHED_LIMIT 698 699static const char *rh_state_string(struct ehci_hcd *ehci) 700{ 701 switch (ehci->rh_state) { 702 case EHCI_RH_HALTED: 703 return "halted"; 704 case EHCI_RH_SUSPENDED: 705 return "suspended"; 706 case EHCI_RH_RUNNING: 707 return "running"; 708 } 709 return "?"; 710} 711 712static ssize_t fill_registers_buffer(struct debug_buffer *buf) 713{ 714 struct usb_hcd *hcd; 715 struct ehci_hcd *ehci; 716 unsigned long flags; 717 unsigned temp, size, i; 718 char *next, scratch [80]; 719 static char fmt [] = "%*s\n"; 720 static char label [] = ""; 721 722 hcd = bus_to_hcd(buf->bus); 723 ehci = hcd_to_ehci (hcd); 724 next = buf->output_buf; 725 size = buf->alloc_size; 726 727 spin_lock_irqsave (&ehci->lock, flags); 728 729 if (!HCD_HW_ACCESSIBLE(hcd)) { 730 size = scnprintf (next, size, 731 "bus %s, device %s\n" 732 "%s\n" 733 "SUSPENDED (no register access)\n", 734 hcd->self.controller->bus->name, 735 dev_name(hcd->self.controller), 736 hcd->product_desc); 737 goto done; 738 } 739 740 /* Capability Registers */ 741 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 742 temp = scnprintf (next, size, 743 "bus %s, device %s\n" 744 "%s\n" 745 "EHCI %x.%02x, rh state %s\n", 746 hcd->self.controller->bus->name, 747 dev_name(hcd->self.controller), 748 hcd->product_desc, 749 i >> 8, i & 0x0ff, rh_state_string(ehci)); 750 size -= temp; 751 next += temp; 752 753#ifdef CONFIG_PCI 754 /* EHCI 0.96 and later may have "extended capabilities" */ 755 if (hcd->self.controller->bus == &pci_bus_type) { 756 struct pci_dev *pdev; 757 u32 offset, cap, cap2; 758 unsigned count = 256/4; 759 760 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); 761 offset = HCC_EXT_CAPS(ehci_readl(ehci, 762 &ehci->caps->hcc_params)); 763 while (offset && count--) { 764 pci_read_config_dword (pdev, offset, &cap); 765 switch (cap & 0xff) { 766 case 1: 767 temp = scnprintf (next, size, 768 "ownership %08x%s%s\n", cap, 769 (cap & (1 << 24)) ? " linux" : "", 770 (cap & (1 << 16)) ? " firmware" : ""); 771 size -= temp; 772 next += temp; 773 774 offset += 4; 775 pci_read_config_dword (pdev, offset, &cap2); 776 temp = scnprintf (next, size, 777 "SMI sts/enable 0x%08x\n", cap2); 778 size -= temp; 779 next += temp; 780 break; 781 case 0: /* illegal reserved capability */ 782 cap = 0; 783 /* FALLTHROUGH */ 784 default: /* unknown */ 785 break; 786 } 787 temp = (cap >> 8) & 0xff; 788 } 789 } 790#endif 791 792 // FIXME interpret both types of params 793 i = ehci_readl(ehci, &ehci->caps->hcs_params); 794 temp = scnprintf (next, size, "structural params 0x%08x\n", i); 795 size -= temp; 796 next += temp; 797 798 i = ehci_readl(ehci, &ehci->caps->hcc_params); 799 temp = scnprintf (next, size, "capability params 0x%08x\n", i); 800 size -= temp; 801 next += temp; 802 803 /* Operational Registers */ 804 temp = dbg_status_buf (scratch, sizeof scratch, label, 805 ehci_readl(ehci, &ehci->regs->status)); 806 temp = scnprintf (next, size, fmt, temp, scratch); 807 size -= temp; 808 next += temp; 809 810 temp = dbg_command_buf (scratch, sizeof scratch, label, 811 ehci_readl(ehci, &ehci->regs->command)); 812 temp = scnprintf (next, size, fmt, temp, scratch); 813 size -= temp; 814 next += temp; 815 816 temp = dbg_intr_buf (scratch, sizeof scratch, label, 817 ehci_readl(ehci, &ehci->regs->intr_enable)); 818 temp = scnprintf (next, size, fmt, temp, scratch); 819 size -= temp; 820 next += temp; 821 822 temp = scnprintf (next, size, "uframe %04x\n", 823 ehci_read_frame_index(ehci)); 824 size -= temp; 825 next += temp; 826 827 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { 828 temp = dbg_port_buf (scratch, sizeof scratch, label, i, 829 ehci_readl(ehci, 830 &ehci->regs->port_status[i - 1])); 831 temp = scnprintf (next, size, fmt, temp, scratch); 832 size -= temp; 833 next += temp; 834 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { 835 temp = scnprintf (next, size, 836 " debug control %08x\n", 837 ehci_readl(ehci, 838 &ehci->debug->control)); 839 size -= temp; 840 next += temp; 841 } 842 } 843 844 if (ehci->reclaim) { 845 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim); 846 size -= temp; 847 next += temp; 848 } 849 850#ifdef EHCI_STATS 851 temp = scnprintf (next, size, 852 "irq normal %ld err %ld reclaim %ld (lost %ld)\n", 853 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, 854 ehci->stats.lost_iaa); 855 size -= temp; 856 next += temp; 857 858 temp = scnprintf (next, size, "complete %ld unlink %ld\n", 859 ehci->stats.complete, ehci->stats.unlink); 860 size -= temp; 861 next += temp; 862#endif 863 864done: 865 spin_unlock_irqrestore (&ehci->lock, flags); 866 867 return buf->alloc_size - size; 868} 869 870static struct debug_buffer *alloc_buffer(struct usb_bus *bus, 871 ssize_t (*fill_func)(struct debug_buffer *)) 872{ 873 struct debug_buffer *buf; 874 875 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); 876 877 if (buf) { 878 buf->bus = bus; 879 buf->fill_func = fill_func; 880 mutex_init(&buf->mutex); 881 buf->alloc_size = PAGE_SIZE; 882 } 883 884 return buf; 885} 886 887static int fill_buffer(struct debug_buffer *buf) 888{ 889 int ret = 0; 890 891 if (!buf->output_buf) 892 buf->output_buf = vmalloc(buf->alloc_size); 893 894 if (!buf->output_buf) { 895 ret = -ENOMEM; 896 goto out; 897 } 898 899 ret = buf->fill_func(buf); 900 901 if (ret >= 0) { 902 buf->count = ret; 903 ret = 0; 904 } 905 906out: 907 return ret; 908} 909 910static ssize_t debug_output(struct file *file, char __user *user_buf, 911 size_t len, loff_t *offset) 912{ 913 struct debug_buffer *buf = file->private_data; 914 int ret = 0; 915 916 mutex_lock(&buf->mutex); 917 if (buf->count == 0) { 918 ret = fill_buffer(buf); 919 if (ret != 0) { 920 mutex_unlock(&buf->mutex); 921 goto out; 922 } 923 } 924 mutex_unlock(&buf->mutex); 925 926 ret = simple_read_from_buffer(user_buf, len, offset, 927 buf->output_buf, buf->count); 928 929out: 930 return ret; 931 932} 933 934static int debug_close(struct inode *inode, struct file *file) 935{ 936 struct debug_buffer *buf = file->private_data; 937 938 if (buf) { 939 vfree(buf->output_buf); 940 kfree(buf); 941 } 942 943 return 0; 944} 945static int debug_async_open(struct inode *inode, struct file *file) 946{ 947 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); 948 949 return file->private_data ? 0 : -ENOMEM; 950} 951 952static int debug_periodic_open(struct inode *inode, struct file *file) 953{ 954 struct debug_buffer *buf; 955 buf = alloc_buffer(inode->i_private, fill_periodic_buffer); 956 if (!buf) 957 return -ENOMEM; 958 959 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; 960 file->private_data = buf; 961 return 0; 962} 963 964static int debug_registers_open(struct inode *inode, struct file *file) 965{ 966 file->private_data = alloc_buffer(inode->i_private, 967 fill_registers_buffer); 968 969 return file->private_data ? 0 : -ENOMEM; 970} 971 972static int debug_lpm_close(struct inode *inode, struct file *file) 973{ 974 return 0; 975} 976 977static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, 978 size_t count, loff_t *ppos) 979{ 980 /* TODO: show lpm stats */ 981 return 0; 982} 983 984static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf, 985 size_t count, loff_t *ppos) 986{ 987 struct usb_hcd *hcd; 988 struct ehci_hcd *ehci; 989 char buf[50]; 990 size_t len; 991 u32 temp; 992 unsigned long port; 993 u32 __iomem *portsc ; 994 u32 params; 995 996 hcd = bus_to_hcd(file->private_data); 997 ehci = hcd_to_ehci(hcd); 998 999 len = min(count, sizeof(buf) - 1); 1000 if (copy_from_user(buf, user_buf, len)) 1001 return -EFAULT; 1002 buf[len] = '\0'; 1003 if (len > 0 && buf[len - 1] == '\n') 1004 buf[len - 1] = '\0'; 1005 1006 if (strncmp(buf, "enable", 5) == 0) { 1007 if (strict_strtoul(buf + 7, 10, &port)) 1008 return -EINVAL; 1009 params = ehci_readl(ehci, &ehci->caps->hcs_params); 1010 if (port > HCS_N_PORTS(params)) { 1011 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port); 1012 return -ENODEV; 1013 } 1014 portsc = &ehci->regs->port_status[port-1]; 1015 temp = ehci_readl(ehci, portsc); 1016 if (!(temp & PORT_DEV_ADDR)) { 1017 ehci_dbg(ehci, "LPM: no device attached\n"); 1018 return -ENODEV; 1019 } 1020 temp |= PORT_LPM; 1021 ehci_writel(ehci, temp, portsc); 1022 printk(KERN_INFO "force enable LPM for port %lu\n", port); 1023 } else if (strncmp(buf, "hird=", 5) == 0) { 1024 unsigned long hird; 1025 if (strict_strtoul(buf + 5, 16, &hird)) 1026 return -EINVAL; 1027 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird); 1028 temp = ehci_readl(ehci, &ehci->regs->command); 1029 temp &= ~CMD_HIRD; 1030 temp |= hird << 24; 1031 ehci_writel(ehci, temp, &ehci->regs->command); 1032 } else if (strncmp(buf, "disable", 7) == 0) { 1033 if (strict_strtoul(buf + 8, 10, &port)) 1034 return -EINVAL; 1035 params = ehci_readl(ehci, &ehci->caps->hcs_params); 1036 if (port > HCS_N_PORTS(params)) { 1037 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port); 1038 return -ENODEV; 1039 } 1040 portsc = &ehci->regs->port_status[port-1]; 1041 temp = ehci_readl(ehci, portsc); 1042 if (!(temp & PORT_DEV_ADDR)) { 1043 ehci_dbg(ehci, "ERR: no device attached\n"); 1044 return -ENODEV; 1045 } 1046 temp &= ~PORT_LPM; 1047 ehci_writel(ehci, temp, portsc); 1048 printk(KERN_INFO "disabled LPM for port %lu\n", port); 1049 } else 1050 return -EOPNOTSUPP; 1051 return count; 1052} 1053 1054static inline void create_debug_files (struct ehci_hcd *ehci) 1055{ 1056 struct usb_bus *bus = &ehci_to_hcd(ehci)->self; 1057 1058 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); 1059 if (!ehci->debug_dir) 1060 return; 1061 1062 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, 1063 &debug_async_fops)) 1064 goto file_error; 1065 1066 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, 1067 &debug_periodic_fops)) 1068 goto file_error; 1069 1070 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, 1071 &debug_registers_fops)) 1072 goto file_error; 1073 1074 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus, 1075 &debug_lpm_fops)) 1076 goto file_error; 1077 1078 return; 1079 1080file_error: 1081 debugfs_remove_recursive(ehci->debug_dir); 1082} 1083 1084static inline void remove_debug_files (struct ehci_hcd *ehci) 1085{ 1086 debugfs_remove_recursive(ehci->debug_dir); 1087} 1088 1089#endif /* STUB_DEBUG_FILES */ 1090