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 */ 42 static 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 76 static 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 * */ 86 static 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 114 115 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {} 116 117 #endif 118 119 #ifdef DEBUG 120 121 static void __maybe_unused 122 dbg_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 } 136 137 static void __maybe_unused 138 dbg_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 } 146 147 static void __maybe_unused 148 dbg_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 } 177 178 static void __maybe_unused 179 dbg_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 } 192 193 static int __maybe_unused 194 dbg_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 } 212 213 static int __maybe_unused 214 dbg_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 } 228 229 static const char *const fls_strings [] = 230 { "1024", "512", "256", "??" }; 231 232 static int 233 dbg_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 } 256 257 static int 258 dbg_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 299 static inline void __maybe_unused 300 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) 301 {} 302 303 static inline int __maybe_unused 304 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) 305 { return 0; } 306 307 static inline int __maybe_unused 308 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) 309 { return 0; } 310 311 static inline int __maybe_unused 312 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) 313 { return 0; } 314 315 static inline int __maybe_unused 316 dbg_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 343 344 static inline void create_debug_files (struct ehci_hcd *bus) { } 345 static inline void remove_debug_files (struct ehci_hcd *bus) { } 346 347 #else 348 349 /* troubleshooting help: expose state in debugfs */ 350 351 static int debug_async_open(struct inode *, struct file *); 352 static int debug_periodic_open(struct inode *, struct file *); 353 static int debug_registers_open(struct inode *, struct file *); 354 static int debug_async_open(struct inode *, struct file *); 355 static int debug_lpm_open(struct inode *, struct file *); 356 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, 357 size_t count, loff_t *ppos); 358 static ssize_t debug_lpm_write(struct file *file, const char __user *buffer, 359 size_t count, loff_t *ppos); 360 static int debug_lpm_close(struct inode *inode, struct file *file); 361 362 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); 363 static int debug_close(struct inode *, struct file *); 364 365 static const struct file_operations debug_async_fops = { 366 .owner = THIS_MODULE, 367 .open = debug_async_open, 368 .read = debug_output, 369 .release = debug_close, 370 .llseek = default_llseek, 371 }; 372 static const struct file_operations debug_periodic_fops = { 373 .owner = THIS_MODULE, 374 .open = debug_periodic_open, 375 .read = debug_output, 376 .release = debug_close, 377 .llseek = default_llseek, 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 .llseek = default_llseek, 385 }; 386 static const struct file_operations debug_lpm_fops = { 387 .owner = THIS_MODULE, 388 .open = debug_lpm_open, 389 .read = debug_lpm_read, 390 .write = debug_lpm_write, 391 .release = debug_lpm_close, 392 .llseek = noop_llseek, 393 }; 394 395 static struct dentry *ehci_debug_root; 396 397 struct debug_buffer { 398 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ 399 struct usb_bus *bus; 400 struct mutex mutex; /* protect filling of buffer */ 401 size_t count; /* number of characters filled into buffer */ 402 char *output_buf; 403 size_t alloc_size; 404 }; 405 406 #define speed_char(info1) ({ char tmp; \ 407 switch (info1 & (3 << 12)) { \ 408 case 0 << 12: tmp = 'f'; break; \ 409 case 1 << 12: tmp = 'l'; break; \ 410 case 2 << 12: tmp = 'h'; break; \ 411 default: tmp = '?'; break; \ 412 }; tmp; }) 413 414 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token) 415 { 416 __u32 v = hc32_to_cpu(ehci, token); 417 418 if (v & QTD_STS_ACTIVE) 419 return '*'; 420 if (v & QTD_STS_HALT) 421 return '-'; 422 if (!IS_SHORT_READ (v)) 423 return ' '; 424 /* tries to advance through hw_alt_next */ 425 return '/'; 426 } 427 428 static void qh_lines ( 429 struct ehci_hcd *ehci, 430 struct ehci_qh *qh, 431 char **nextp, 432 unsigned *sizep 433 ) 434 { 435 u32 scratch; 436 u32 hw_curr; 437 struct list_head *entry; 438 struct ehci_qtd *td; 439 unsigned temp; 440 unsigned size = *sizep; 441 char *next = *nextp; 442 char mark; 443 __le32 list_end = EHCI_LIST_END(ehci); 444 struct ehci_qh_hw *hw = qh->hw; 445 446 if (hw->hw_qtd_next == list_end) /* NEC does this */ 447 mark = '@'; 448 else 449 mark = token_mark(ehci, hw->hw_token); 450 if (mark == '/') { /* qh_alt_next controls qh advance? */ 451 if ((hw->hw_alt_next & QTD_MASK(ehci)) 452 == ehci->async->hw->hw_alt_next) 453 mark = '#'; /* blocked */ 454 else if (hw->hw_alt_next == list_end) 455 mark = '.'; /* use hw_qtd_next */ 456 /* else alt_next points to some other qtd */ 457 } 458 scratch = hc32_to_cpup(ehci, &hw->hw_info1); 459 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0; 460 temp = scnprintf (next, size, 461 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)", 462 qh, scratch & 0x007f, 463 speed_char (scratch), 464 (scratch >> 8) & 0x000f, 465 scratch, hc32_to_cpup(ehci, &hw->hw_info2), 466 hc32_to_cpup(ehci, &hw->hw_token), mark, 467 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) 468 ? "data1" : "data0", 469 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f); 470 size -= temp; 471 next += temp; 472 473 /* hc may be modifying the list as we read it ... */ 474 list_for_each (entry, &qh->qtd_list) { 475 td = list_entry (entry, struct ehci_qtd, qtd_list); 476 scratch = hc32_to_cpup(ehci, &td->hw_token); 477 mark = ' '; 478 if (hw_curr == td->qtd_dma) 479 mark = '*'; 480 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) 481 mark = '+'; 482 else if (QTD_LENGTH (scratch)) { 483 if (td->hw_alt_next == ehci->async->hw->hw_alt_next) 484 mark = '#'; 485 else if (td->hw_alt_next != list_end) 486 mark = '/'; 487 } 488 temp = snprintf (next, size, 489 "\n\t%p%c%s len=%d %08x urb %p", 490 td, mark, ({ char *tmp; 491 switch ((scratch>>8)&0x03) { 492 case 0: tmp = "out"; break; 493 case 1: tmp = "in"; break; 494 case 2: tmp = "setup"; break; 495 default: tmp = "?"; break; 496 } tmp;}), 497 (scratch >> 16) & 0x7fff, 498 scratch, 499 td->urb); 500 if (size < temp) 501 temp = size; 502 size -= temp; 503 next += temp; 504 if (temp == size) 505 goto done; 506 } 507 508 temp = snprintf (next, size, "\n"); 509 if (size < temp) 510 temp = size; 511 size -= temp; 512 next += temp; 513 514 done: 515 *sizep = size; 516 *nextp = next; 517 } 518 519 static ssize_t fill_async_buffer(struct debug_buffer *buf) 520 { 521 struct usb_hcd *hcd; 522 struct ehci_hcd *ehci; 523 unsigned long flags; 524 unsigned temp, size; 525 char *next; 526 struct ehci_qh *qh; 527 528 hcd = bus_to_hcd(buf->bus); 529 ehci = hcd_to_ehci (hcd); 530 next = buf->output_buf; 531 size = buf->alloc_size; 532 533 *next = 0; 534 535 /* dumps a snapshot of the async schedule. 536 * usually empty except for long-term bulk reads, or head. 537 * one QH per line, and TDs we know about 538 */ 539 spin_lock_irqsave (&ehci->lock, flags); 540 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) 541 qh_lines (ehci, qh, &next, &size); 542 if (ehci->reclaim && size > 0) { 543 temp = scnprintf (next, size, "\nreclaim =\n"); 544 size -= temp; 545 next += temp; 546 547 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim) 548 qh_lines (ehci, qh, &next, &size); 549 } 550 spin_unlock_irqrestore (&ehci->lock, flags); 551 552 return strlen(buf->output_buf); 553 } 554 555 #define DBG_SCHED_LIMIT 64 556 static ssize_t fill_periodic_buffer(struct debug_buffer *buf) 557 { 558 struct usb_hcd *hcd; 559 struct ehci_hcd *ehci; 560 unsigned long flags; 561 union ehci_shadow p, *seen; 562 unsigned temp, size, seen_count; 563 char *next; 564 unsigned i; 565 __hc32 tag; 566 567 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) 568 return 0; 569 seen_count = 0; 570 571 hcd = bus_to_hcd(buf->bus); 572 ehci = hcd_to_ehci (hcd); 573 next = buf->output_buf; 574 size = buf->alloc_size; 575 576 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); 577 size -= temp; 578 next += temp; 579 580 /* dump a snapshot of the periodic schedule. 581 * iso changes, interrupt usually doesn't. 582 */ 583 spin_lock_irqsave (&ehci->lock, flags); 584 for (i = 0; i < ehci->periodic_size; i++) { 585 p = ehci->pshadow [i]; 586 if (likely (!p.ptr)) 587 continue; 588 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); 589 590 temp = scnprintf (next, size, "%4d: ", i); 591 size -= temp; 592 next += temp; 593 594 do { 595 struct ehci_qh_hw *hw; 596 597 switch (hc32_to_cpu(ehci, tag)) { 598 case Q_TYPE_QH: 599 hw = p.qh->hw; 600 temp = scnprintf (next, size, " qh%d-%04x/%p", 601 p.qh->period, 602 hc32_to_cpup(ehci, 603 &hw->hw_info2) 604 /* uframe masks */ 605 & (QH_CMASK | QH_SMASK), 606 p.qh); 607 size -= temp; 608 next += temp; 609 /* don't repeat what follows this qh */ 610 for (temp = 0; temp < seen_count; temp++) { 611 if (seen [temp].ptr != p.ptr) 612 continue; 613 if (p.qh->qh_next.ptr) { 614 temp = scnprintf (next, size, 615 " ..."); 616 size -= temp; 617 next += temp; 618 } 619 break; 620 } 621 /* show more info the first time around */ 622 if (temp == seen_count) { 623 u32 scratch = hc32_to_cpup(ehci, 624 &hw->hw_info1); 625 struct ehci_qtd *qtd; 626 char *type = ""; 627 628 /* count tds, get ep direction */ 629 temp = 0; 630 list_for_each_entry (qtd, 631 &p.qh->qtd_list, 632 qtd_list) { 633 temp++; 634 switch (0x03 & (hc32_to_cpu( 635 ehci, 636 qtd->hw_token) >> 8)) { 637 case 0: type = "out"; continue; 638 case 1: type = "in"; continue; 639 } 640 } 641 642 temp = scnprintf (next, size, 643 " (%c%d ep%d%s " 644 "[%d/%d] q%d p%d)", 645 speed_char (scratch), 646 scratch & 0x007f, 647 (scratch >> 8) & 0x000f, type, 648 p.qh->usecs, p.qh->c_usecs, 649 temp, 650 0x7ff & (scratch >> 16)); 651 652 if (seen_count < DBG_SCHED_LIMIT) 653 seen [seen_count++].qh = p.qh; 654 } else 655 temp = 0; 656 if (p.qh) { 657 tag = Q_NEXT_TYPE(ehci, hw->hw_next); 658 p = p.qh->qh_next; 659 } 660 break; 661 case Q_TYPE_FSTN: 662 temp = scnprintf (next, size, 663 " fstn-%8x/%p", p.fstn->hw_prev, 664 p.fstn); 665 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); 666 p = p.fstn->fstn_next; 667 break; 668 case Q_TYPE_ITD: 669 temp = scnprintf (next, size, 670 " itd/%p", p.itd); 671 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); 672 p = p.itd->itd_next; 673 break; 674 case Q_TYPE_SITD: 675 temp = scnprintf (next, size, 676 " sitd%d-%04x/%p", 677 p.sitd->stream->interval, 678 hc32_to_cpup(ehci, &p.sitd->hw_uframe) 679 & 0x0000ffff, 680 p.sitd); 681 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); 682 p = p.sitd->sitd_next; 683 break; 684 } 685 size -= temp; 686 next += temp; 687 } while (p.ptr); 688 689 temp = scnprintf (next, size, "\n"); 690 size -= temp; 691 next += temp; 692 } 693 spin_unlock_irqrestore (&ehci->lock, flags); 694 kfree (seen); 695 696 return buf->alloc_size - size; 697 } 698 #undef DBG_SCHED_LIMIT 699 700 static const char *rh_state_string(struct ehci_hcd *ehci) 701 { 702 switch (ehci->rh_state) { 703 case EHCI_RH_HALTED: 704 return "halted"; 705 case EHCI_RH_SUSPENDED: 706 return "suspended"; 707 case EHCI_RH_RUNNING: 708 return "running"; 709 } 710 return "?"; 711 } 712 713 static ssize_t fill_registers_buffer(struct debug_buffer *buf) 714 { 715 struct usb_hcd *hcd; 716 struct ehci_hcd *ehci; 717 unsigned long flags; 718 unsigned temp, size, i; 719 char *next, scratch [80]; 720 static char fmt [] = "%*s\n"; 721 static char label [] = ""; 722 723 hcd = bus_to_hcd(buf->bus); 724 ehci = hcd_to_ehci (hcd); 725 next = buf->output_buf; 726 size = buf->alloc_size; 727 728 spin_lock_irqsave (&ehci->lock, flags); 729 730 if (!HCD_HW_ACCESSIBLE(hcd)) { 731 size = scnprintf (next, size, 732 "bus %s, device %s\n" 733 "%s\n" 734 "SUSPENDED (no register access)\n", 735 hcd->self.controller->bus->name, 736 dev_name(hcd->self.controller), 737 hcd->product_desc); 738 goto done; 739 } 740 741 /* Capability Registers */ 742 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 743 temp = scnprintf (next, size, 744 "bus %s, device %s\n" 745 "%s\n" 746 "EHCI %x.%02x, rh state %s\n", 747 hcd->self.controller->bus->name, 748 dev_name(hcd->self.controller), 749 hcd->product_desc, 750 i >> 8, i & 0x0ff, rh_state_string(ehci)); 751 size -= temp; 752 next += temp; 753 754 #ifdef CONFIG_PCI 755 /* EHCI 0.96 and later may have "extended capabilities" */ 756 if (hcd->self.controller->bus == &pci_bus_type) { 757 struct pci_dev *pdev; 758 u32 offset, cap, cap2; 759 unsigned count = 256/4; 760 761 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); 762 offset = HCC_EXT_CAPS(ehci_readl(ehci, 763 &ehci->caps->hcc_params)); 764 while (offset && count--) { 765 pci_read_config_dword (pdev, offset, &cap); 766 switch (cap & 0xff) { 767 case 1: 768 temp = scnprintf (next, size, 769 "ownership %08x%s%s\n", cap, 770 (cap & (1 << 24)) ? " linux" : "", 771 (cap & (1 << 16)) ? " firmware" : ""); 772 size -= temp; 773 next += temp; 774 775 offset += 4; 776 pci_read_config_dword (pdev, offset, &cap2); 777 temp = scnprintf (next, size, 778 "SMI sts/enable 0x%08x\n", cap2); 779 size -= temp; 780 next += temp; 781 break; 782 case 0: /* illegal reserved capability */ 783 cap = 0; 784 /* FALLTHROUGH */ 785 default: /* unknown */ 786 break; 787 } 788 temp = (cap >> 8) & 0xff; 789 } 790 } 791 #endif 792 793 // FIXME interpret both types of params 794 i = ehci_readl(ehci, &ehci->caps->hcs_params); 795 temp = scnprintf (next, size, "structural params 0x%08x\n", i); 796 size -= temp; 797 next += temp; 798 799 i = ehci_readl(ehci, &ehci->caps->hcc_params); 800 temp = scnprintf (next, size, "capability params 0x%08x\n", i); 801 size -= temp; 802 next += temp; 803 804 /* Operational Registers */ 805 temp = dbg_status_buf (scratch, sizeof scratch, label, 806 ehci_readl(ehci, &ehci->regs->status)); 807 temp = scnprintf (next, size, fmt, temp, scratch); 808 size -= temp; 809 next += temp; 810 811 temp = dbg_command_buf (scratch, sizeof scratch, label, 812 ehci_readl(ehci, &ehci->regs->command)); 813 temp = scnprintf (next, size, fmt, temp, scratch); 814 size -= temp; 815 next += temp; 816 817 temp = dbg_intr_buf (scratch, sizeof scratch, label, 818 ehci_readl(ehci, &ehci->regs->intr_enable)); 819 temp = scnprintf (next, size, fmt, temp, scratch); 820 size -= temp; 821 next += temp; 822 823 temp = scnprintf (next, size, "uframe %04x\n", 824 ehci_read_frame_index(ehci)); 825 size -= temp; 826 next += temp; 827 828 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { 829 temp = dbg_port_buf (scratch, sizeof scratch, label, i, 830 ehci_readl(ehci, 831 &ehci->regs->port_status[i - 1])); 832 temp = scnprintf (next, size, fmt, temp, scratch); 833 size -= temp; 834 next += temp; 835 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { 836 temp = scnprintf (next, size, 837 " debug control %08x\n", 838 ehci_readl(ehci, 839 &ehci->debug->control)); 840 size -= temp; 841 next += temp; 842 } 843 } 844 845 if (ehci->reclaim) { 846 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim); 847 size -= temp; 848 next += temp; 849 } 850 851 #ifdef EHCI_STATS 852 temp = scnprintf (next, size, 853 "irq normal %ld err %ld reclaim %ld (lost %ld)\n", 854 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, 855 ehci->stats.lost_iaa); 856 size -= temp; 857 next += temp; 858 859 temp = scnprintf (next, size, "complete %ld unlink %ld\n", 860 ehci->stats.complete, ehci->stats.unlink); 861 size -= temp; 862 next += temp; 863 #endif 864 865 done: 866 spin_unlock_irqrestore (&ehci->lock, flags); 867 868 return buf->alloc_size - size; 869 } 870 871 static struct debug_buffer *alloc_buffer(struct usb_bus *bus, 872 ssize_t (*fill_func)(struct debug_buffer *)) 873 { 874 struct debug_buffer *buf; 875 876 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); 877 878 if (buf) { 879 buf->bus = bus; 880 buf->fill_func = fill_func; 881 mutex_init(&buf->mutex); 882 buf->alloc_size = PAGE_SIZE; 883 } 884 885 return buf; 886 } 887 888 static int fill_buffer(struct debug_buffer *buf) 889 { 890 int ret = 0; 891 892 if (!buf->output_buf) 893 buf->output_buf = vmalloc(buf->alloc_size); 894 895 if (!buf->output_buf) { 896 ret = -ENOMEM; 897 goto out; 898 } 899 900 ret = buf->fill_func(buf); 901 902 if (ret >= 0) { 903 buf->count = ret; 904 ret = 0; 905 } 906 907 out: 908 return ret; 909 } 910 911 static ssize_t debug_output(struct file *file, char __user *user_buf, 912 size_t len, loff_t *offset) 913 { 914 struct debug_buffer *buf = file->private_data; 915 int ret = 0; 916 917 mutex_lock(&buf->mutex); 918 if (buf->count == 0) { 919 ret = fill_buffer(buf); 920 if (ret != 0) { 921 mutex_unlock(&buf->mutex); 922 goto out; 923 } 924 } 925 mutex_unlock(&buf->mutex); 926 927 ret = simple_read_from_buffer(user_buf, len, offset, 928 buf->output_buf, buf->count); 929 930 out: 931 return ret; 932 933 } 934 935 static int debug_close(struct inode *inode, struct file *file) 936 { 937 struct debug_buffer *buf = file->private_data; 938 939 if (buf) { 940 vfree(buf->output_buf); 941 kfree(buf); 942 } 943 944 return 0; 945 } 946 static int debug_async_open(struct inode *inode, struct file *file) 947 { 948 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); 949 950 return file->private_data ? 0 : -ENOMEM; 951 } 952 953 static int debug_periodic_open(struct inode *inode, struct file *file) 954 { 955 struct debug_buffer *buf; 956 buf = alloc_buffer(inode->i_private, fill_periodic_buffer); 957 if (!buf) 958 return -ENOMEM; 959 960 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; 961 file->private_data = buf; 962 return 0; 963 } 964 965 static int debug_registers_open(struct inode *inode, struct file *file) 966 { 967 file->private_data = alloc_buffer(inode->i_private, 968 fill_registers_buffer); 969 970 return file->private_data ? 0 : -ENOMEM; 971 } 972 973 static int debug_lpm_open(struct inode *inode, struct file *file) 974 { 975 file->private_data = inode->i_private; 976 return 0; 977 } 978 979 static int debug_lpm_close(struct inode *inode, struct file *file) 980 { 981 return 0; 982 } 983 984 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, 985 size_t count, loff_t *ppos) 986 { 987 /* TODO: show lpm stats */ 988 return 0; 989 } 990 991 static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf, 992 size_t count, loff_t *ppos) 993 { 994 struct usb_hcd *hcd; 995 struct ehci_hcd *ehci; 996 char buf[50]; 997 size_t len; 998 u32 temp; 999 unsigned long port; 1000 u32 __iomem *portsc ; 1001 u32 params; 1002 1003 hcd = bus_to_hcd(file->private_data); 1004 ehci = hcd_to_ehci(hcd); 1005 1006 len = min(count, sizeof(buf) - 1); 1007 if (copy_from_user(buf, user_buf, len)) 1008 return -EFAULT; 1009 buf[len] = '\0'; 1010 if (len > 0 && buf[len - 1] == '\n') 1011 buf[len - 1] = '\0'; 1012 1013 if (strncmp(buf, "enable", 5) == 0) { 1014 if (strict_strtoul(buf + 7, 10, &port)) 1015 return -EINVAL; 1016 params = ehci_readl(ehci, &ehci->caps->hcs_params); 1017 if (port > HCS_N_PORTS(params)) { 1018 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port); 1019 return -ENODEV; 1020 } 1021 portsc = &ehci->regs->port_status[port-1]; 1022 temp = ehci_readl(ehci, portsc); 1023 if (!(temp & PORT_DEV_ADDR)) { 1024 ehci_dbg(ehci, "LPM: no device attached\n"); 1025 return -ENODEV; 1026 } 1027 temp |= PORT_LPM; 1028 ehci_writel(ehci, temp, portsc); 1029 printk(KERN_INFO "force enable LPM for port %lu\n", port); 1030 } else if (strncmp(buf, "hird=", 5) == 0) { 1031 unsigned long hird; 1032 if (strict_strtoul(buf + 5, 16, &hird)) 1033 return -EINVAL; 1034 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird); 1035 temp = ehci_readl(ehci, &ehci->regs->command); 1036 temp &= ~CMD_HIRD; 1037 temp |= hird << 24; 1038 ehci_writel(ehci, temp, &ehci->regs->command); 1039 } else if (strncmp(buf, "disable", 7) == 0) { 1040 if (strict_strtoul(buf + 8, 10, &port)) 1041 return -EINVAL; 1042 params = ehci_readl(ehci, &ehci->caps->hcs_params); 1043 if (port > HCS_N_PORTS(params)) { 1044 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port); 1045 return -ENODEV; 1046 } 1047 portsc = &ehci->regs->port_status[port-1]; 1048 temp = ehci_readl(ehci, portsc); 1049 if (!(temp & PORT_DEV_ADDR)) { 1050 ehci_dbg(ehci, "ERR: no device attached\n"); 1051 return -ENODEV; 1052 } 1053 temp &= ~PORT_LPM; 1054 ehci_writel(ehci, temp, portsc); 1055 printk(KERN_INFO "disabled LPM for port %lu\n", port); 1056 } else 1057 return -EOPNOTSUPP; 1058 return count; 1059 } 1060 1061 static inline void create_debug_files (struct ehci_hcd *ehci) 1062 { 1063 struct usb_bus *bus = &ehci_to_hcd(ehci)->self; 1064 1065 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); 1066 if (!ehci->debug_dir) 1067 return; 1068 1069 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, 1070 &debug_async_fops)) 1071 goto file_error; 1072 1073 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, 1074 &debug_periodic_fops)) 1075 goto file_error; 1076 1077 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, 1078 &debug_registers_fops)) 1079 goto file_error; 1080 1081 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus, 1082 &debug_lpm_fops)) 1083 goto file_error; 1084 1085 return; 1086 1087 file_error: 1088 debugfs_remove_recursive(ehci->debug_dir); 1089 } 1090 1091 static inline void remove_debug_files (struct ehci_hcd *ehci) 1092 { 1093 debugfs_remove_recursive(ehci->debug_dir); 1094 } 1095 1096 #endif /* STUB_DEBUG_FILES */ 1097