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