1 /* 2 * OHCI HCD (Host Controller Driver) for USB. 3 * 4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> 5 * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> 6 * 7 * This file is licenced under GPL 8 */ 9 10 /*-------------------------------------------------------------------------*/ 11 12 /* 13 * OHCI Root Hub ... the nonsharable stuff 14 */ 15 16 #define dbg_port(hc,label,num,value) \ 17 ohci_dbg (hc, \ 18 "%s roothub.portstatus [%d] " \ 19 "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ 20 label, num, temp, \ 21 (temp & RH_PS_PRSC) ? " PRSC" : "", \ 22 (temp & RH_PS_OCIC) ? " OCIC" : "", \ 23 (temp & RH_PS_PSSC) ? " PSSC" : "", \ 24 (temp & RH_PS_PESC) ? " PESC" : "", \ 25 (temp & RH_PS_CSC) ? " CSC" : "", \ 26 \ 27 (temp & RH_PS_LSDA) ? " LSDA" : "", \ 28 (temp & RH_PS_PPS) ? " PPS" : "", \ 29 (temp & RH_PS_PRS) ? " PRS" : "", \ 30 (temp & RH_PS_POCI) ? " POCI" : "", \ 31 (temp & RH_PS_PSS) ? " PSS" : "", \ 32 \ 33 (temp & RH_PS_PES) ? " PES" : "", \ 34 (temp & RH_PS_CCS) ? " CCS" : "" \ 35 ); 36 37 /*-------------------------------------------------------------------------*/ 38 39 /* hcd->hub_irq_enable() */ 40 static void ohci_rhsc_enable (struct usb_hcd *hcd) 41 { 42 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 43 44 spin_lock_irq(&ohci->lock); 45 if (!ohci->autostop) 46 del_timer(&hcd->rh_timer); /* Prevent next poll */ 47 ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable); 48 spin_unlock_irq(&ohci->lock); 49 } 50 51 #define OHCI_SCHED_ENABLES \ 52 (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) 53 54 static void dl_done_list (struct ohci_hcd *); 55 static void finish_unlinks (struct ohci_hcd *, u16); 56 57 #ifdef CONFIG_PM 58 static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop) 59 __releases(ohci->lock) 60 __acquires(ohci->lock) 61 { 62 int status = 0; 63 64 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); 65 switch (ohci->hc_control & OHCI_CTRL_HCFS) { 66 case OHCI_USB_RESUME: 67 ohci_dbg (ohci, "resume/suspend?\n"); 68 ohci->hc_control &= ~OHCI_CTRL_HCFS; 69 ohci->hc_control |= OHCI_USB_RESET; 70 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 71 (void) ohci_readl (ohci, &ohci->regs->control); 72 /* FALL THROUGH */ 73 case OHCI_USB_RESET: 74 status = -EBUSY; 75 ohci_dbg (ohci, "needs reinit!\n"); 76 goto done; 77 case OHCI_USB_SUSPEND: 78 if (!ohci->autostop) { 79 ohci_dbg (ohci, "already suspended\n"); 80 goto done; 81 } 82 } 83 ohci_dbg (ohci, "%s root hub\n", 84 autostop ? "auto-stop" : "suspend"); 85 86 /* First stop any processing */ 87 if (!autostop && (ohci->hc_control & OHCI_SCHED_ENABLES)) { 88 ohci->hc_control &= ~OHCI_SCHED_ENABLES; 89 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 90 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); 91 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus); 92 93 /* sched disables take effect on the next frame, 94 * then the last WDH could take 6+ msec 95 */ 96 ohci_dbg (ohci, "stopping schedules ...\n"); 97 ohci->autostop = 0; 98 spin_unlock_irq (&ohci->lock); 99 msleep (8); 100 spin_lock_irq (&ohci->lock); 101 } 102 dl_done_list (ohci); 103 finish_unlinks (ohci, ohci_frame_no(ohci)); 104 105 /* maybe resume can wake root hub */ 106 if (device_may_wakeup(&ohci_to_hcd(ohci)->self.root_hub->dev) || 107 autostop) 108 ohci->hc_control |= OHCI_CTRL_RWE; 109 else { 110 ohci_writel (ohci, OHCI_INTR_RHSC, &ohci->regs->intrdisable); 111 ohci->hc_control &= ~OHCI_CTRL_RWE; 112 } 113 114 /* Suspend hub ... this is the "global (to this bus) suspend" mode, 115 * which doesn't imply ports will first be individually suspended. 116 */ 117 ohci->hc_control &= ~OHCI_CTRL_HCFS; 118 ohci->hc_control |= OHCI_USB_SUSPEND; 119 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 120 (void) ohci_readl (ohci, &ohci->regs->control); 121 122 /* no resumes until devices finish suspending */ 123 if (!autostop) { 124 ohci->next_statechange = jiffies + msecs_to_jiffies (5); 125 ohci->autostop = 0; 126 } 127 128 done: 129 return status; 130 } 131 132 static inline struct ed *find_head (struct ed *ed) 133 { 134 /* for bulk and control lists */ 135 while (ed->ed_prev) 136 ed = ed->ed_prev; 137 return ed; 138 } 139 140 /* caller has locked the root hub */ 141 static int ohci_rh_resume (struct ohci_hcd *ohci) 142 __releases(ohci->lock) 143 __acquires(ohci->lock) 144 { 145 struct usb_hcd *hcd = ohci_to_hcd (ohci); 146 u32 temp, enables; 147 int status = -EINPROGRESS; 148 int autostopped = ohci->autostop; 149 150 ohci->autostop = 0; 151 ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); 152 153 if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { 154 /* this can happen after resuming a swsusp snapshot */ 155 if (hcd->state == HC_STATE_RESUMING) { 156 ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", 157 ohci->hc_control); 158 status = -EBUSY; 159 /* this happens when pmcore resumes HC then root */ 160 } else { 161 ohci_dbg (ohci, "duplicate resume\n"); 162 status = 0; 163 } 164 } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { 165 case OHCI_USB_SUSPEND: 166 ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); 167 ohci->hc_control |= OHCI_USB_RESUME; 168 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 169 (void) ohci_readl (ohci, &ohci->regs->control); 170 ohci_dbg (ohci, "%s root hub\n", 171 autostopped ? "auto-start" : "resume"); 172 break; 173 case OHCI_USB_RESUME: 174 /* HCFS changes sometime after INTR_RD */ 175 ohci_dbg(ohci, "%swakeup root hub\n", 176 autostopped ? "auto-" : ""); 177 break; 178 case OHCI_USB_OPER: 179 /* this can happen after resuming a swsusp snapshot */ 180 ohci_dbg (ohci, "snapshot resume? reinit\n"); 181 status = -EBUSY; 182 break; 183 default: /* RESET, we lost power */ 184 ohci_dbg (ohci, "lost power\n"); 185 status = -EBUSY; 186 } 187 if (status == -EBUSY) { 188 if (!autostopped) { 189 spin_unlock_irq (&ohci->lock); 190 (void) ohci_init (ohci); 191 status = ohci_restart (ohci); 192 193 usb_root_hub_lost_power(hcd->self.root_hub); 194 195 spin_lock_irq (&ohci->lock); 196 } 197 return status; 198 } 199 if (status != -EINPROGRESS) 200 return status; 201 if (autostopped) 202 goto skip_resume; 203 spin_unlock_irq (&ohci->lock); 204 205 /* Some controllers (lucent erratum) need extra-long delays */ 206 msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); 207 208 temp = ohci_readl (ohci, &ohci->regs->control); 209 temp &= OHCI_CTRL_HCFS; 210 if (temp != OHCI_USB_RESUME) { 211 ohci_err (ohci, "controller won't resume\n"); 212 spin_lock_irq(&ohci->lock); 213 return -EBUSY; 214 } 215 216 /* disable old schedule state, reinit from scratch */ 217 ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); 218 ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); 219 ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); 220 ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); 221 ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); 222 ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); 223 224 /* Sometimes PCI D3 suspend trashes frame timings ... */ 225 periodic_reinit (ohci); 226 227 /* the following code is executed with ohci->lock held and 228 * irqs disabled if and only if autostopped is true 229 */ 230 231 skip_resume: 232 /* interrupts might have been disabled */ 233 ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); 234 if (ohci->ed_rm_list) 235 ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); 236 237 /* Then re-enable operations */ 238 ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); 239 (void) ohci_readl (ohci, &ohci->regs->control); 240 if (!autostopped) 241 msleep (3); 242 243 temp = ohci->hc_control; 244 temp &= OHCI_CTRL_RWC; 245 temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; 246 ohci->hc_control = temp; 247 ohci_writel (ohci, temp, &ohci->regs->control); 248 (void) ohci_readl (ohci, &ohci->regs->control); 249 250 /* TRSMRCY */ 251 if (!autostopped) { 252 msleep (10); 253 spin_lock_irq (&ohci->lock); 254 } 255 /* now ohci->lock is always held and irqs are always disabled */ 256 257 /* keep it alive for more than ~5x suspend + resume costs */ 258 ohci->next_statechange = jiffies + STATECHANGE_DELAY; 259 260 /* maybe turn schedules back on */ 261 enables = 0; 262 temp = 0; 263 if (!ohci->ed_rm_list) { 264 if (ohci->ed_controltail) { 265 ohci_writel (ohci, 266 find_head (ohci->ed_controltail)->dma, 267 &ohci->regs->ed_controlhead); 268 enables |= OHCI_CTRL_CLE; 269 temp |= OHCI_CLF; 270 } 271 if (ohci->ed_bulktail) { 272 ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, 273 &ohci->regs->ed_bulkhead); 274 enables |= OHCI_CTRL_BLE; 275 temp |= OHCI_BLF; 276 } 277 } 278 if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) 279 enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; 280 if (enables) { 281 ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); 282 ohci->hc_control |= enables; 283 ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); 284 if (temp) 285 ohci_writel (ohci, temp, &ohci->regs->cmdstatus); 286 (void) ohci_readl (ohci, &ohci->regs->control); 287 } 288 289 return 0; 290 } 291 292 static int ohci_bus_suspend (struct usb_hcd *hcd) 293 { 294 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 295 int rc; 296 297 spin_lock_irq (&ohci->lock); 298 299 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 300 rc = -ESHUTDOWN; 301 else 302 rc = ohci_rh_suspend (ohci, 0); 303 spin_unlock_irq (&ohci->lock); 304 return rc; 305 } 306 307 static int ohci_bus_resume (struct usb_hcd *hcd) 308 { 309 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 310 int rc; 311 312 if (time_before (jiffies, ohci->next_statechange)) 313 msleep(5); 314 315 spin_lock_irq (&ohci->lock); 316 317 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 318 rc = -ESHUTDOWN; 319 else 320 rc = ohci_rh_resume (ohci); 321 spin_unlock_irq (&ohci->lock); 322 323 /* poll until we know a device is connected or we autostop */ 324 if (rc == 0) 325 usb_hcd_poll_rh_status(hcd); 326 return rc; 327 } 328 329 /* Carry out polling-, autostop-, and autoresume-related state changes */ 330 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, 331 int any_connected) 332 { 333 int poll_rh = 1; 334 335 switch (ohci->hc_control & OHCI_CTRL_HCFS) { 336 337 case OHCI_USB_OPER: 338 /* keep on polling until we know a device is connected 339 * and RHSC is enabled */ 340 if (!ohci->autostop) { 341 if (any_connected || 342 !device_may_wakeup(&ohci_to_hcd(ohci) 343 ->self.root_hub->dev)) { 344 if (ohci_readl(ohci, &ohci->regs->intrenable) & 345 OHCI_INTR_RHSC) 346 poll_rh = 0; 347 } else { 348 ohci->autostop = 1; 349 ohci->next_statechange = jiffies + HZ; 350 } 351 352 /* if no devices have been attached for one second, autostop */ 353 } else { 354 if (changed || any_connected) { 355 ohci->autostop = 0; 356 ohci->next_statechange = jiffies + 357 STATECHANGE_DELAY; 358 } else if (time_after_eq(jiffies, 359 ohci->next_statechange) 360 && !ohci->ed_rm_list 361 && !(ohci->hc_control & 362 OHCI_SCHED_ENABLES)) { 363 ohci_rh_suspend(ohci, 1); 364 } 365 } 366 break; 367 368 /* if there is a port change, autostart or ask to be resumed */ 369 case OHCI_USB_SUSPEND: 370 case OHCI_USB_RESUME: 371 if (changed) { 372 if (ohci->autostop) 373 ohci_rh_resume(ohci); 374 else 375 usb_hcd_resume_root_hub(ohci_to_hcd(ohci)); 376 } else { 377 /* everything is idle, no need for polling */ 378 poll_rh = 0; 379 } 380 break; 381 } 382 return poll_rh; 383 } 384 385 #else /* CONFIG_PM */ 386 387 static inline int ohci_rh_resume(struct ohci_hcd *ohci) 388 { 389 return 0; 390 } 391 392 /* Carry out polling-related state changes. 393 * autostop isn't used when CONFIG_PM is turned off. 394 */ 395 static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, 396 int any_connected) 397 { 398 int poll_rh = 1; 399 400 /* keep on polling until RHSC is enabled */ 401 if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC) 402 poll_rh = 0; 403 return poll_rh; 404 } 405 406 #endif /* CONFIG_PM */ 407 408 /*-------------------------------------------------------------------------*/ 409 410 /* build "status change" packet (one or two bytes) from HC registers */ 411 412 static int 413 ohci_hub_status_data (struct usb_hcd *hcd, char *buf) 414 { 415 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 416 int i, changed = 0, length = 1; 417 int any_connected = 0; 418 unsigned long flags; 419 420 spin_lock_irqsave (&ohci->lock, flags); 421 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) 422 goto done; 423 424 /* undocumented erratum seen on at least rev D */ 425 if ((ohci->flags & OHCI_QUIRK_AMD756) 426 && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { 427 ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", 428 ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); 429 /* retry later; "should not happen" */ 430 goto done; 431 } 432 433 /* init status */ 434 if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) 435 buf [0] = changed = 1; 436 else 437 buf [0] = 0; 438 if (ohci->num_ports > 7) { 439 buf [1] = 0; 440 length++; 441 } 442 443 /* look at each port */ 444 for (i = 0; i < ohci->num_ports; i++) { 445 u32 status = roothub_portstatus (ohci, i); 446 447 /* can't autostop if ports are connected */ 448 any_connected |= (status & RH_PS_CCS); 449 450 if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC 451 | RH_PS_OCIC | RH_PS_PRSC)) { 452 changed = 1; 453 if (i < 7) 454 buf [0] |= 1 << (i + 1); 455 else 456 buf [1] |= 1 << (i - 7); 457 } 458 } 459 460 hcd->poll_rh = ohci_root_hub_state_changes(ohci, changed, 461 any_connected); 462 463 done: 464 spin_unlock_irqrestore (&ohci->lock, flags); 465 466 return changed ? length : 0; 467 } 468 469 /*-------------------------------------------------------------------------*/ 470 471 static void 472 ohci_hub_descriptor ( 473 struct ohci_hcd *ohci, 474 struct usb_hub_descriptor *desc 475 ) { 476 u32 rh = roothub_a (ohci); 477 u16 temp; 478 479 desc->bDescriptorType = 0x29; 480 desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; 481 desc->bHubContrCurrent = 0; 482 483 desc->bNbrPorts = ohci->num_ports; 484 temp = 1 + (ohci->num_ports / 8); 485 desc->bDescLength = 7 + 2 * temp; 486 487 temp = 0; 488 if (rh & RH_A_NPS) /* no power switching? */ 489 temp |= 0x0002; 490 if (rh & RH_A_PSM) /* per-port power switching? */ 491 temp |= 0x0001; 492 if (rh & RH_A_NOCP) /* no overcurrent reporting? */ 493 temp |= 0x0010; 494 else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ 495 temp |= 0x0008; 496 desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ohci, temp); 497 498 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ 499 rh = roothub_b (ohci); 500 memset(desc->bitmap, 0xff, sizeof(desc->bitmap)); 501 desc->bitmap [0] = rh & RH_B_DR; 502 if (ohci->num_ports > 7) { 503 desc->bitmap [1] = (rh & RH_B_DR) >> 8; 504 desc->bitmap [2] = 0xff; 505 } else 506 desc->bitmap [1] = 0xff; 507 } 508 509 /*-------------------------------------------------------------------------*/ 510 511 #ifdef CONFIG_USB_OTG 512 513 static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) 514 { 515 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 516 u32 status; 517 518 if (!port) 519 return -EINVAL; 520 port--; 521 522 /* start port reset before HNP protocol times out */ 523 status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); 524 if (!(status & RH_PS_CCS)) 525 return -ENODEV; 526 527 /* khubd will finish the reset later */ 528 ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); 529 return 0; 530 } 531 532 static void start_hnp(struct ohci_hcd *ohci); 533 534 #else 535 536 #define ohci_start_port_reset NULL 537 538 #endif 539 540 /*-------------------------------------------------------------------------*/ 541 542 543 /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, 544 * not necessarily continuous ... to guard against resume signaling. 545 * The short timeout is safe for non-root hubs, and is backward-compatible 546 * with earlier Linux hosts. 547 */ 548 #ifdef CONFIG_USB_SUSPEND 549 #define PORT_RESET_MSEC 50 550 #else 551 #define PORT_RESET_MSEC 10 552 #endif 553 554 /* this timer value might be vendor-specific ... */ 555 #define PORT_RESET_HW_MSEC 10 556 557 /* wrap-aware logic morphed from <linux/jiffies.h> */ 558 #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) 559 560 /* called from some task, normally khubd */ 561 static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port) 562 { 563 __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; 564 u32 temp; 565 u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); 566 u16 reset_done = now + PORT_RESET_MSEC; 567 568 /* build a "continuous enough" reset signal, with up to 569 * 3msec gap between pulses. scheduler HZ==100 must work; 570 * this might need to be deadline-scheduled. 571 */ 572 do { 573 /* spin until any current reset finishes */ 574 for (;;) { 575 temp = ohci_readl (ohci, portstat); 576 /* handle e.g. CardBus eject */ 577 if (temp == ~(u32)0) 578 return -ESHUTDOWN; 579 if (!(temp & RH_PS_PRS)) 580 break; 581 udelay (500); 582 } 583 584 if (!(temp & RH_PS_CCS)) 585 break; 586 if (temp & RH_PS_PRSC) 587 ohci_writel (ohci, RH_PS_PRSC, portstat); 588 589 /* start the next reset, sleep till it's probably done */ 590 ohci_writel (ohci, RH_PS_PRS, portstat); 591 msleep(PORT_RESET_HW_MSEC); 592 now = ohci_readl(ohci, &ohci->regs->fmnumber); 593 } while (tick_before(now, reset_done)); 594 /* caller synchronizes using PRSC */ 595 596 return 0; 597 } 598 599 static int ohci_hub_control ( 600 struct usb_hcd *hcd, 601 u16 typeReq, 602 u16 wValue, 603 u16 wIndex, 604 char *buf, 605 u16 wLength 606 ) { 607 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 608 int ports = hcd_to_bus (hcd)->root_hub->maxchild; 609 u32 temp; 610 int retval = 0; 611 612 if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) 613 return -ESHUTDOWN; 614 615 switch (typeReq) { 616 case ClearHubFeature: 617 switch (wValue) { 618 case C_HUB_OVER_CURRENT: 619 ohci_writel (ohci, RH_HS_OCIC, 620 &ohci->regs->roothub.status); 621 case C_HUB_LOCAL_POWER: 622 break; 623 default: 624 goto error; 625 } 626 break; 627 case ClearPortFeature: 628 if (!wIndex || wIndex > ports) 629 goto error; 630 wIndex--; 631 632 switch (wValue) { 633 case USB_PORT_FEAT_ENABLE: 634 temp = RH_PS_CCS; 635 break; 636 case USB_PORT_FEAT_C_ENABLE: 637 temp = RH_PS_PESC; 638 break; 639 case USB_PORT_FEAT_SUSPEND: 640 temp = RH_PS_POCI; 641 break; 642 case USB_PORT_FEAT_C_SUSPEND: 643 temp = RH_PS_PSSC; 644 break; 645 case USB_PORT_FEAT_POWER: 646 temp = RH_PS_LSDA; 647 break; 648 case USB_PORT_FEAT_C_CONNECTION: 649 temp = RH_PS_CSC; 650 break; 651 case USB_PORT_FEAT_C_OVER_CURRENT: 652 temp = RH_PS_OCIC; 653 break; 654 case USB_PORT_FEAT_C_RESET: 655 temp = RH_PS_PRSC; 656 break; 657 default: 658 goto error; 659 } 660 ohci_writel (ohci, temp, 661 &ohci->regs->roothub.portstatus [wIndex]); 662 // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); 663 break; 664 case GetHubDescriptor: 665 ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); 666 break; 667 case GetHubStatus: 668 temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); 669 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf); 670 break; 671 case GetPortStatus: 672 if (!wIndex || wIndex > ports) 673 goto error; 674 wIndex--; 675 temp = roothub_portstatus (ohci, wIndex); 676 put_unaligned(cpu_to_le32 (temp), (__le32 *) buf); 677 678 #ifndef OHCI_VERBOSE_DEBUG 679 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ 680 #endif 681 dbg_port (ohci, "GetStatus", wIndex, temp); 682 break; 683 case SetHubFeature: 684 switch (wValue) { 685 case C_HUB_OVER_CURRENT: 686 // FIXME: this can be cleared, yes? 687 case C_HUB_LOCAL_POWER: 688 break; 689 default: 690 goto error; 691 } 692 break; 693 case SetPortFeature: 694 if (!wIndex || wIndex > ports) 695 goto error; 696 wIndex--; 697 switch (wValue) { 698 case USB_PORT_FEAT_SUSPEND: 699 #ifdef CONFIG_USB_OTG 700 if (hcd->self.otg_port == (wIndex + 1) 701 && hcd->self.b_hnp_enable) 702 start_hnp(ohci); 703 else 704 #endif 705 ohci_writel (ohci, RH_PS_PSS, 706 &ohci->regs->roothub.portstatus [wIndex]); 707 break; 708 case USB_PORT_FEAT_POWER: 709 ohci_writel (ohci, RH_PS_PPS, 710 &ohci->regs->roothub.portstatus [wIndex]); 711 break; 712 case USB_PORT_FEAT_RESET: 713 retval = root_port_reset (ohci, wIndex); 714 break; 715 default: 716 goto error; 717 } 718 break; 719 720 default: 721 error: 722 /* "protocol stall" on error */ 723 retval = -EPIPE; 724 } 725 return retval; 726 } 727 728