2 * Copyright (C) 2001-2004 by David Brownell
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.
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
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.
19 /* this file is part of ehci-hcd.c */
21 /*-------------------------------------------------------------------------*/
24 * EHCI Root Hub ... the nonsharable stuff
26 * Registers don't need cpu_to_le32, that happens transparently
29 /*-------------------------------------------------------------------------*/
30 #include <linux/usb/otg.h>
32 #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
36 static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
38 return !udev->maxchild && udev->persist_enabled &&
39 udev->bus->root_hub->speed < USB_SPEED_HIGH;
42 /* After a power loss, ports that were owned by the companion must be
43 * reset so that the companion can still own them.
45 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
51 struct usb_hcd *hcd = ehci_to_hcd(ehci);
53 if (!ehci->owned_ports)
57 * USB 1.1 devices are mostly HIDs, which don't need to persist across
58 * suspends. If we ensure that none of our companion's devices have
59 * persist_enabled (by looking through all USB 1.1 buses in the system),
60 * we can skip this and avoid slowing resume down. Devices without
61 * persist will just get reenumerated shortly after resume anyway.
63 if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
66 /* Make sure the ports are powered */
67 port = HCS_N_PORTS(ehci->hcs_params);
69 if (test_bit(port, &ehci->owned_ports)) {
70 reg = &ehci->regs->port_status[port];
71 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
72 if (!(status & PORT_POWER))
73 ehci_port_power(ehci, port, true);
77 /* Give the connections some time to appear */
80 spin_lock_irq(&ehci->lock);
81 port = HCS_N_PORTS(ehci->hcs_params);
83 if (test_bit(port, &ehci->owned_ports)) {
84 reg = &ehci->regs->port_status[port];
85 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
87 /* Port already owned by companion? */
88 if (status & PORT_OWNER)
89 clear_bit(port, &ehci->owned_ports);
90 else if (test_bit(port, &ehci->companion_ports))
91 ehci_writel(ehci, status & ~PORT_PE, reg);
93 spin_unlock_irq(&ehci->lock);
94 ehci_hub_control(hcd, SetPortFeature,
95 USB_PORT_FEAT_RESET, port + 1,
97 spin_lock_irq(&ehci->lock);
101 spin_unlock_irq(&ehci->lock);
103 if (!ehci->owned_ports)
105 msleep(90); /* Wait for resets to complete */
107 spin_lock_irq(&ehci->lock);
108 port = HCS_N_PORTS(ehci->hcs_params);
110 if (test_bit(port, &ehci->owned_ports)) {
111 spin_unlock_irq(&ehci->lock);
112 ehci_hub_control(hcd, GetPortStatus,
114 (char *) &buf, sizeof(buf));
115 spin_lock_irq(&ehci->lock);
117 /* The companion should now own the port,
118 * but if something went wrong the port must not
121 reg = &ehci->regs->port_status[port];
122 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
123 if (status & PORT_OWNER)
124 ehci_writel(ehci, status | PORT_CSC, reg);
126 ehci_dbg(ehci, "failed handover port %d: %x\n",
128 ehci_writel(ehci, status & ~PORT_PE, reg);
133 ehci->owned_ports = 0;
134 spin_unlock_irq(&ehci->lock);
137 static int ehci_port_change(struct ehci_hcd *ehci)
139 int i = HCS_N_PORTS(ehci->hcs_params);
141 /* First check if the controller indicates a change event */
143 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
147 * Not all controllers appear to update this while going from D3 to D0,
148 * so check the individual port status registers as well
152 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
158 static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
159 bool suspending, bool do_wakeup)
164 /* If remote wakeup is enabled for the root hub but disabled
165 * for the controller, we must adjust all the port wakeup flags
166 * when the controller is suspended or resumed. In all other
167 * cases they don't need to be changed.
169 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
172 spin_lock_irq(&ehci->lock);
174 /* clear phy low-power mode before changing wakeup flags */
175 if (ehci->has_tdi_phy_lpm) {
176 port = HCS_N_PORTS(ehci->hcs_params);
178 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
180 temp = ehci_readl(ehci, hostpc_reg);
181 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
183 spin_unlock_irq(&ehci->lock);
185 spin_lock_irq(&ehci->lock);
188 port = HCS_N_PORTS(ehci->hcs_params);
190 u32 __iomem *reg = &ehci->regs->port_status[port];
191 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
192 u32 t2 = t1 & ~PORT_WAKE_BITS;
194 /* If we are suspending the controller, clear the flags.
195 * If we are resuming the controller, set the wakeup flags.
198 if (t1 & PORT_CONNECT)
199 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
201 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
203 ehci_writel(ehci, t2, reg);
206 /* enter phy low-power mode again */
207 if (ehci->has_tdi_phy_lpm) {
208 port = HCS_N_PORTS(ehci->hcs_params);
210 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
212 temp = ehci_readl(ehci, hostpc_reg);
213 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
217 /* Does the root hub have a port wakeup pending? */
218 if (!suspending && ehci_port_change(ehci))
219 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
221 spin_unlock_irq(&ehci->lock);
224 static int ehci_bus_suspend (struct usb_hcd *hcd)
226 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
232 ehci_dbg(ehci, "suspend root hub\n");
234 if (time_before (jiffies, ehci->next_statechange))
237 /* stop the schedules */
240 spin_lock_irq (&ehci->lock);
241 if (ehci->rh_state < EHCI_RH_RUNNING)
244 /* Once the controller is stopped, port resumes that are already
245 * in progress won't complete. Hence if remote wakeup is enabled
246 * for the root hub and any ports are in the middle of a resume or
247 * remote wakeup, we must fail the suspend.
249 if (hcd->self.root_hub->do_remote_wakeup) {
250 if (ehci->resuming_ports) {
251 spin_unlock_irq(&ehci->lock);
252 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
257 /* Unlike other USB host controller types, EHCI doesn't have
258 * any notion of "global" or bus-wide suspend. The driver has
259 * to manually suspend all the active unsuspended ports, and
260 * then manually resume them in the bus_resume() routine.
262 ehci->bus_suspended = 0;
263 ehci->owned_ports = 0;
265 fs_idle_delay = false;
266 port = HCS_N_PORTS(ehci->hcs_params);
268 u32 __iomem *reg = &ehci->regs->port_status [port];
269 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
270 u32 t2 = t1 & ~PORT_WAKE_BITS;
272 /* keep track of which ports we suspend */
274 set_bit(port, &ehci->owned_ports);
275 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
277 set_bit(port, &ehci->bus_suspended);
280 /* enable remote wakeup on all ports, if told to do so */
281 if (hcd->self.root_hub->do_remote_wakeup) {
282 /* only enable appropriate wake bits, otherwise the
283 * hardware can not go phy low power mode. If a race
284 * condition happens here(connection change during bits
285 * set), the port change detection will finally fix it.
287 if (t1 & PORT_CONNECT)
288 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
290 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
295 * On some controllers, Wake-On-Disconnect will
296 * generate false wakeup signals until the bus
297 * switches over to full-speed idle. For their
298 * sake, add a delay if we need one.
300 if ((t2 & PORT_WKDISC_E) &&
301 ehci_port_speed(ehci, t2) ==
302 USB_PORT_STAT_HIGH_SPEED)
303 fs_idle_delay = true;
304 ehci_writel(ehci, t2, reg);
308 spin_unlock_irq(&ehci->lock);
310 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
312 * Wait for HCD to enter low-power mode or for the bus
313 * to switch to full-speed idle.
315 usleep_range(5000, 5500);
318 if (changed && ehci->has_tdi_phy_lpm) {
319 spin_lock_irq(&ehci->lock);
320 port = HCS_N_PORTS(ehci->hcs_params);
322 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
325 t3 = ehci_readl(ehci, hostpc_reg);
326 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
327 t3 = ehci_readl(ehci, hostpc_reg);
328 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
329 port, (t3 & HOSTPC_PHCD) ?
330 "succeeded" : "failed");
332 spin_unlock_irq(&ehci->lock);
335 /* Apparently some devices need a >= 1-uframe delay here */
336 if (ehci->bus_suspended)
339 /* turn off now-idle HC */
342 spin_lock_irq(&ehci->lock);
343 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
344 ehci_handle_controller_death(ehci);
345 if (ehci->rh_state != EHCI_RH_RUNNING)
347 ehci->rh_state = EHCI_RH_SUSPENDED;
349 end_unlink_async(ehci);
350 unlink_empty_async_suspended(ehci);
351 ehci_handle_start_intr_unlinks(ehci);
352 ehci_handle_intr_unlinks(ehci);
355 /* allow remote wakeup */
357 if (!hcd->self.root_hub->do_remote_wakeup)
359 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
360 ehci_readl(ehci, &ehci->regs->intr_enable);
363 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
364 ehci->enabled_hrtimer_events = 0;
365 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
366 spin_unlock_irq (&ehci->lock);
368 hrtimer_cancel(&ehci->hrtimer);
373 /* caller has locked the root hub, and should reset/reinit on error */
374 static int ehci_bus_resume (struct usb_hcd *hcd)
376 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
380 unsigned long resume_needed = 0;
382 if (time_before (jiffies, ehci->next_statechange))
384 spin_lock_irq (&ehci->lock);
385 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
388 if (unlikely(ehci->debug)) {
389 if (!dbgp_reset_prep(hcd))
392 dbgp_external_startup(hcd);
395 /* Ideally and we've got a real resume here, and no port's power
396 * was lost. (For PCI, that means Vaux was maintained.) But we
397 * could instead be restoring a swsusp snapshot -- so that BIOS was
398 * the last user of the controller, not reset/pm hardware keeping
399 * state we gave to it.
401 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
402 ehci_dbg(ehci, "resume root hub%s\n",
403 power_okay ? "" : " after power loss");
405 /* at least some APM implementations will try to deliver
406 * IRQs right away, so delay them until we're ready.
408 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
410 /* re-init operational registers */
411 ehci_writel(ehci, 0, &ehci->regs->segment);
412 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
413 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
415 /* restore CMD_RUN, framelist size, and irq threshold */
416 ehci->command |= CMD_RUN;
417 ehci_writel(ehci, ehci->command, &ehci->regs->command);
418 ehci->rh_state = EHCI_RH_RUNNING;
421 * According to Bugzilla #8190, the port status for some controllers
422 * will be wrong without a delay. At their wrong status, the port
423 * is enabled, but not suspended neither resumed.
425 i = HCS_N_PORTS(ehci->hcs_params);
427 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
428 if ((temp & PORT_PE) &&
429 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
430 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
431 spin_unlock_irq(&ehci->lock);
433 spin_lock_irq(&ehci->lock);
441 /* clear phy low-power mode before resume */
442 if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
443 i = HCS_N_PORTS(ehci->hcs_params);
445 if (test_bit(i, &ehci->bus_suspended)) {
446 u32 __iomem *hostpc_reg =
447 &ehci->regs->hostpc[i];
449 temp = ehci_readl(ehci, hostpc_reg);
450 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
454 spin_unlock_irq(&ehci->lock);
456 spin_lock_irq(&ehci->lock);
461 /* manually resume the ports we suspended during bus_suspend() */
462 i = HCS_N_PORTS (ehci->hcs_params);
464 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
465 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
466 if (test_bit(i, &ehci->bus_suspended) &&
467 (temp & PORT_SUSPEND)) {
469 set_bit(i, &resume_needed);
471 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
474 /* msleep for 20ms only if code is trying to resume port */
476 spin_unlock_irq(&ehci->lock);
478 spin_lock_irq(&ehci->lock);
483 i = HCS_N_PORTS (ehci->hcs_params);
485 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
486 if (test_bit(i, &resume_needed)) {
487 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
488 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
492 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
493 spin_unlock_irq(&ehci->lock);
495 ehci_handover_companion_ports(ehci);
497 /* Now we can safely re-enable irqs */
498 spin_lock_irq(&ehci->lock);
501 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
502 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
503 spin_unlock_irq(&ehci->lock);
508 spin_unlock_irq(&ehci->lock);
514 #define ehci_bus_suspend NULL
515 #define ehci_bus_resume NULL
517 #endif /* CONFIG_PM */
519 /*-------------------------------------------------------------------------*/
522 * Sets the owner of a port
524 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
526 u32 __iomem *status_reg;
530 status_reg = &ehci->regs->port_status[portnum];
533 * The controller won't set the OWNER bit if the port is
534 * enabled, so this loop will sometimes require at least two
535 * iterations: one to disable the port and one to set OWNER.
537 for (try = 4; try > 0; --try) {
538 spin_lock_irq(&ehci->lock);
539 port_status = ehci_readl(ehci, status_reg);
540 if ((port_status & PORT_OWNER) == new_owner
541 || (port_status & (PORT_OWNER | PORT_CONNECT))
545 port_status ^= PORT_OWNER;
546 port_status &= ~(PORT_PE | PORT_RWC_BITS);
547 ehci_writel(ehci, port_status, status_reg);
549 spin_unlock_irq(&ehci->lock);
555 /*-------------------------------------------------------------------------*/
557 static int check_reset_complete (
558 struct ehci_hcd *ehci,
560 u32 __iomem *status_reg,
563 if (!(port_status & PORT_CONNECT))
566 /* if reset finished and it's still not enabled -- handoff */
567 if (!(port_status & PORT_PE)) {
569 /* with integrated TT, there's nobody to hand it to! */
570 if (ehci_is_TDI(ehci)) {
572 "Failed to enable port %d on root hub TT\n",
577 ehci_dbg (ehci, "port %d full speed --> companion\n",
580 // what happens if HCS_N_CC(params) == 0 ?
581 port_status |= PORT_OWNER;
582 port_status &= ~PORT_RWC_BITS;
583 ehci_writel(ehci, port_status, status_reg);
585 /* ensure 440EPX ohci controller state is operational */
586 if (ehci->has_amcc_usb23)
587 set_ohci_hcfs(ehci, 1);
589 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
591 /* ensure 440EPx ohci controller state is suspended */
592 if (ehci->has_amcc_usb23)
593 set_ohci_hcfs(ehci, 0);
599 /*-------------------------------------------------------------------------*/
602 /* build "status change" packet (one or two bytes) from HC registers */
605 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
607 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
610 int ports, i, retval = 1;
614 /* init status to no-changes */
616 ports = HCS_N_PORTS (ehci->hcs_params);
622 /* Inform the core about resumes-in-progress by returning
623 * a non-zero value even if there are no status changes.
625 status = ehci->resuming_ports;
627 /* Some boards (mostly VIA?) report bogus overcurrent indications,
628 * causing massive log spam unless we completely ignore them. It
629 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
630 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
631 * PORT_POWER; that's surprising, but maybe within-spec.
634 mask = PORT_CSC | PORT_PEC | PORT_OCC;
636 mask = PORT_CSC | PORT_PEC;
637 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
639 /* no hub change reports (bit 0) for now (power, ...) */
641 /* port N changes (bit N)? */
642 spin_lock_irqsave (&ehci->lock, flags);
644 /* get per-port change detect bits */
646 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
648 for (i = 0; i < ports; i++) {
649 /* leverage per-port change bits feature */
651 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
656 * Return status information even for ports with OWNER set.
657 * Otherwise hub_wq wouldn't see the disconnect event when a
658 * high-speed device is switched over to the companion
659 * controller by the user.
662 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
663 || (ehci->reset_done[i] && time_after_eq(
664 jiffies, ehci->reset_done[i]))) {
666 buf [0] |= 1 << (i + 1);
668 buf [1] |= 1 << (i - 7);
673 /* If a resume is in progress, make sure it can finish */
674 if (ehci->resuming_ports)
675 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
677 spin_unlock_irqrestore (&ehci->lock, flags);
678 return status ? retval : 0;
681 /*-------------------------------------------------------------------------*/
684 ehci_hub_descriptor (
685 struct ehci_hcd *ehci,
686 struct usb_hub_descriptor *desc
688 int ports = HCS_N_PORTS (ehci->hcs_params);
691 desc->bDescriptorType = 0x29;
692 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
693 desc->bHubContrCurrent = 0;
695 desc->bNbrPorts = ports;
696 temp = 1 + (ports / 8);
697 desc->bDescLength = 7 + 2 * temp;
699 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
700 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
701 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
703 temp = 0x0008; /* per-port overcurrent reporting */
704 if (HCS_PPC (ehci->hcs_params))
705 temp |= 0x0001; /* per-port power control */
707 temp |= 0x0002; /* no power switching */
709 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
710 if (HCS_INDICATOR (ehci->hcs_params))
711 temp |= 0x0080; /* per-port indicators (LEDs) */
713 desc->wHubCharacteristics = cpu_to_le16(temp);
716 /*-------------------------------------------------------------------------*/
717 #ifdef CONFIG_USB_HCD_TEST_MODE
719 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
721 static void usb_ehset_completion(struct urb *urb)
723 struct completion *done = urb->context;
727 static int submit_single_step_set_feature(
734 * Allocate and initialize a control URB. This request will be used by the
735 * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
736 * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
737 * Return NULL if failed.
739 static struct urb *request_single_step_set_feature_urb(
740 struct usb_device *udev,
743 struct completion *done
746 struct usb_hcd *hcd = bus_to_hcd(udev->bus);
747 struct usb_host_endpoint *ep;
749 urb = usb_alloc_urb(0, GFP_KERNEL);
753 urb->pipe = usb_rcvctrlpipe(udev, 0);
754 ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
755 [usb_pipeendpoint(urb->pipe)];
763 urb->setup_packet = (void *)dr;
764 urb->transfer_buffer = buf;
765 urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
766 urb->complete = usb_ehset_completion;
767 urb->status = -EINPROGRESS;
768 urb->actual_length = 0;
769 urb->transfer_flags = URB_DIR_IN;
771 atomic_inc(&urb->use_count);
772 atomic_inc(&urb->dev->urbnum);
773 urb->setup_dma = dma_map_single(
774 hcd->self.controller,
776 sizeof(struct usb_ctrlrequest),
778 urb->transfer_dma = dma_map_single(
779 hcd->self.controller,
780 urb->transfer_buffer,
781 urb->transfer_buffer_length,
787 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
789 int retval = -ENOMEM;
790 struct usb_ctrlrequest *dr;
792 struct usb_device *udev;
793 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
794 struct usb_device_descriptor *buf;
795 DECLARE_COMPLETION_ONSTACK(done);
797 /* Obtain udev of the rhub's child port */
798 udev = usb_hub_find_child(hcd->self.root_hub, port);
800 ehci_err(ehci, "No device attached to the RootHub\n");
803 buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
807 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
813 /* Fill Setup packet for GetDescriptor */
814 dr->bRequestType = USB_DIR_IN;
815 dr->bRequest = USB_REQ_GET_DESCRIPTOR;
816 dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
818 dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
819 urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
823 /* Submit just the SETUP stage */
824 retval = submit_single_step_set_feature(hcd, urb, 1);
827 if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
830 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
835 /* Complete remaining DATA and STATUS stages using the same URB */
836 urb->status = -EINPROGRESS;
838 atomic_inc(&urb->use_count);
839 atomic_inc(&urb->dev->urbnum);
840 retval = submit_single_step_set_feature(hcd, urb, 0);
841 if (!retval && !wait_for_completion_timeout(&done,
842 msecs_to_jiffies(2000))) {
845 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
854 #endif /* CONFIG_USB_HCD_TEST_MODE */
855 /*-------------------------------------------------------------------------*/
857 int ehci_hub_control(
865 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
866 int ports = HCS_N_PORTS (ehci->hcs_params);
867 u32 __iomem *status_reg = &ehci->regs->port_status[
868 (wIndex & 0xff) - 1];
869 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
870 u32 temp, temp1, status;
876 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
877 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
878 * (track current state ourselves) ... blink for diagnostics,
879 * power, "this is the one", etc. EHCI spec supports this.
882 spin_lock_irqsave (&ehci->lock, flags);
884 case ClearHubFeature:
886 case C_HUB_LOCAL_POWER:
887 case C_HUB_OVER_CURRENT:
888 /* no hub-wide feature/status flags */
894 case ClearPortFeature:
895 if (!wIndex || wIndex > ports)
898 temp = ehci_readl(ehci, status_reg);
899 temp &= ~PORT_RWC_BITS;
902 * Even if OWNER is set, so the port is owned by the
903 * companion controller, hub_wq needs to be able to clear
904 * the port-change status bits (especially
905 * USB_PORT_STAT_C_CONNECTION).
909 case USB_PORT_FEAT_ENABLE:
910 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
912 case USB_PORT_FEAT_C_ENABLE:
913 ehci_writel(ehci, temp | PORT_PEC, status_reg);
915 case USB_PORT_FEAT_SUSPEND:
916 if (temp & PORT_RESET)
918 if (ehci->no_selective_suspend)
920 #ifdef CONFIG_USB_OTG
921 if ((hcd->self.otg_port == (wIndex + 1))
922 && hcd->self.b_hnp_enable) {
923 otg_start_hnp(hcd->usb_phy->otg);
927 if (!(temp & PORT_SUSPEND))
929 if ((temp & PORT_PE) == 0)
932 /* clear phy low-power mode before resume */
933 if (ehci->has_tdi_phy_lpm) {
934 temp1 = ehci_readl(ehci, hostpc_reg);
935 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
937 spin_unlock_irqrestore(&ehci->lock, flags);
938 msleep(5);/* wait to leave low-power mode */
939 spin_lock_irqsave(&ehci->lock, flags);
941 /* resume signaling for 20 msec */
942 temp &= ~PORT_WAKE_BITS;
943 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
944 ehci->reset_done[wIndex] = jiffies
945 + msecs_to_jiffies(20);
946 set_bit(wIndex, &ehci->resuming_ports);
947 usb_hcd_start_port_resume(&hcd->self, wIndex);
949 case USB_PORT_FEAT_C_SUSPEND:
950 clear_bit(wIndex, &ehci->port_c_suspend);
952 case USB_PORT_FEAT_POWER:
953 if (HCS_PPC(ehci->hcs_params)) {
954 spin_unlock_irqrestore(&ehci->lock, flags);
955 ehci_port_power(ehci, wIndex, false);
956 spin_lock_irqsave(&ehci->lock, flags);
959 case USB_PORT_FEAT_C_CONNECTION:
960 ehci_writel(ehci, temp | PORT_CSC, status_reg);
962 case USB_PORT_FEAT_C_OVER_CURRENT:
963 ehci_writel(ehci, temp | PORT_OCC, status_reg);
965 case USB_PORT_FEAT_C_RESET:
966 /* GetPortStatus clears reset */
971 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
973 case GetHubDescriptor:
974 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
978 /* no hub-wide feature/status flags */
980 //cpu_to_le32s ((u32 *) buf);
983 if (!wIndex || wIndex > ports)
987 temp = ehci_readl(ehci, status_reg);
991 status |= USB_PORT_STAT_C_CONNECTION << 16;
993 status |= USB_PORT_STAT_C_ENABLE << 16;
995 if ((temp & PORT_OCC) && !ignore_oc){
996 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
999 * Hubs should disable port power on over-current.
1000 * However, not all EHCI implementations do this
1001 * automatically, even if they _do_ support per-port
1002 * power switching; they're allowed to just limit the
1003 * current. hub_wq will turn the power back on.
1005 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1006 && HCS_PPC(ehci->hcs_params)) {
1007 spin_unlock_irqrestore(&ehci->lock, flags);
1008 ehci_port_power(ehci, wIndex, false);
1009 spin_lock_irqsave(&ehci->lock, flags);
1010 temp = ehci_readl(ehci, status_reg);
1014 /* no reset or resume pending */
1015 if (!ehci->reset_done[wIndex]) {
1017 /* Remote Wakeup received? */
1018 if (temp & PORT_RESUME) {
1019 /* resume signaling for 20 msec */
1020 ehci->reset_done[wIndex] = jiffies
1021 + msecs_to_jiffies(20);
1022 usb_hcd_start_port_resume(&hcd->self, wIndex);
1023 set_bit(wIndex, &ehci->resuming_ports);
1024 /* check the port again */
1025 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1026 ehci->reset_done[wIndex]);
1029 /* reset or resume not yet complete */
1030 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1031 ; /* wait until it is complete */
1033 /* resume completed */
1034 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1035 clear_bit(wIndex, &ehci->suspended_ports);
1036 set_bit(wIndex, &ehci->port_c_suspend);
1037 ehci->reset_done[wIndex] = 0;
1038 usb_hcd_end_port_resume(&hcd->self, wIndex);
1040 /* stop resume signaling */
1041 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1042 ehci_writel(ehci, temp, status_reg);
1043 clear_bit(wIndex, &ehci->resuming_ports);
1044 retval = ehci_handshake(ehci, status_reg,
1045 PORT_RESUME, 0, 2000 /* 2msec */);
1047 ehci_err(ehci, "port %d resume error %d\n",
1048 wIndex + 1, retval);
1051 temp = ehci_readl(ehci, status_reg);
1053 /* whoever resets must GetPortStatus to complete it!! */
1055 status |= USB_PORT_STAT_C_RESET << 16;
1056 ehci->reset_done [wIndex] = 0;
1058 /* force reset to complete */
1059 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1061 /* REVISIT: some hardware needs 550+ usec to clear
1062 * this bit; seems too long to spin routinely...
1064 retval = ehci_handshake(ehci, status_reg,
1065 PORT_RESET, 0, 1000);
1067 ehci_err (ehci, "port %d reset error %d\n",
1068 wIndex + 1, retval);
1072 /* see what we found out */
1073 temp = check_reset_complete (ehci, wIndex, status_reg,
1074 ehci_readl(ehci, status_reg));
1077 /* transfer dedicated ports to the companion hc */
1078 if ((temp & PORT_CONNECT) &&
1079 test_bit(wIndex, &ehci->companion_ports)) {
1080 temp &= ~PORT_RWC_BITS;
1082 ehci_writel(ehci, temp, status_reg);
1083 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1084 temp = ehci_readl(ehci, status_reg);
1088 * Even if OWNER is set, there's no harm letting hub_wq
1089 * see the wPortStatus values (they should all be 0 except
1090 * for PORT_POWER anyway).
1093 if (temp & PORT_CONNECT) {
1094 status |= USB_PORT_STAT_CONNECTION;
1095 // status may be from integrated TT
1096 if (ehci->has_hostpc) {
1097 temp1 = ehci_readl(ehci, hostpc_reg);
1098 status |= ehci_port_speed(ehci, temp1);
1100 status |= ehci_port_speed(ehci, temp);
1103 status |= USB_PORT_STAT_ENABLE;
1105 /* maybe the port was unsuspended without our knowledge */
1106 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1107 status |= USB_PORT_STAT_SUSPEND;
1108 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1109 clear_bit(wIndex, &ehci->suspended_ports);
1110 clear_bit(wIndex, &ehci->resuming_ports);
1111 ehci->reset_done[wIndex] = 0;
1113 set_bit(wIndex, &ehci->port_c_suspend);
1114 usb_hcd_end_port_resume(&hcd->self, wIndex);
1118 status |= USB_PORT_STAT_OVERCURRENT;
1119 if (temp & PORT_RESET)
1120 status |= USB_PORT_STAT_RESET;
1121 if (temp & PORT_POWER)
1122 status |= USB_PORT_STAT_POWER;
1123 if (test_bit(wIndex, &ehci->port_c_suspend))
1124 status |= USB_PORT_STAT_C_SUSPEND << 16;
1126 if (status & ~0xffff) /* only if wPortChange is interesting */
1127 dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1128 put_unaligned_le32(status, buf);
1132 case C_HUB_LOCAL_POWER:
1133 case C_HUB_OVER_CURRENT:
1134 /* no hub-wide feature/status flags */
1140 case SetPortFeature:
1141 selector = wIndex >> 8;
1143 if (unlikely(ehci->debug)) {
1144 /* If the debug port is active any port
1145 * feature requests should get denied */
1146 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1147 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1152 if (!wIndex || wIndex > ports)
1155 temp = ehci_readl(ehci, status_reg);
1156 if (temp & PORT_OWNER)
1159 temp &= ~PORT_RWC_BITS;
1161 case USB_PORT_FEAT_SUSPEND:
1162 if (ehci->no_selective_suspend)
1164 if ((temp & PORT_PE) == 0
1165 || (temp & PORT_RESET) != 0)
1168 /* After above check the port must be connected.
1169 * Set appropriate bit thus could put phy into low power
1170 * mode if we have tdi_phy_lpm feature
1172 temp &= ~PORT_WKCONN_E;
1173 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1174 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1175 if (ehci->has_tdi_phy_lpm) {
1176 spin_unlock_irqrestore(&ehci->lock, flags);
1177 msleep(5);/* 5ms for HCD enter low pwr mode */
1178 spin_lock_irqsave(&ehci->lock, flags);
1179 temp1 = ehci_readl(ehci, hostpc_reg);
1180 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1182 temp1 = ehci_readl(ehci, hostpc_reg);
1183 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1184 wIndex, (temp1 & HOSTPC_PHCD) ?
1185 "succeeded" : "failed");
1187 set_bit(wIndex, &ehci->suspended_ports);
1189 case USB_PORT_FEAT_POWER:
1190 if (HCS_PPC(ehci->hcs_params)) {
1191 spin_unlock_irqrestore(&ehci->lock, flags);
1192 ehci_port_power(ehci, wIndex, true);
1193 spin_lock_irqsave(&ehci->lock, flags);
1196 case USB_PORT_FEAT_RESET:
1197 if (temp & (PORT_SUSPEND|PORT_RESUME))
1199 /* line status bits may report this as low speed,
1200 * which can be fine if this root hub has a
1201 * transaction translator built in.
1203 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1204 && !ehci_is_TDI(ehci)
1205 && PORT_USB11 (temp)) {
1207 "port %d low speed --> companion\n",
1215 * caller must wait, then call GetPortStatus
1216 * usb 2.0 spec says 50 ms resets on root
1218 ehci->reset_done [wIndex] = jiffies
1219 + msecs_to_jiffies (50);
1221 ehci_writel(ehci, temp, status_reg);
1224 /* For downstream facing ports (these): one hub port is put
1225 * into test mode according to USB2 11.24.2.13, then the hub
1226 * must be reset (which for root hub now means rmmod+modprobe,
1227 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1228 * about the EHCI-specific stuff.
1230 case USB_PORT_FEAT_TEST:
1231 #ifdef CONFIG_USB_HCD_TEST_MODE
1232 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1233 spin_unlock_irqrestore(&ehci->lock, flags);
1234 retval = ehset_single_step_set_feature(hcd,
1236 spin_lock_irqsave(&ehci->lock, flags);
1240 if (!selector || selector > 5)
1242 spin_unlock_irqrestore(&ehci->lock, flags);
1244 spin_lock_irqsave(&ehci->lock, flags);
1246 /* Put all enabled ports into suspend */
1249 &ehci->regs->port_status[ports];
1251 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1253 ehci_writel(ehci, temp | PORT_SUSPEND,
1257 spin_unlock_irqrestore(&ehci->lock, flags);
1259 spin_lock_irqsave(&ehci->lock, flags);
1261 temp = ehci_readl(ehci, status_reg);
1262 temp |= selector << 16;
1263 ehci_writel(ehci, temp, status_reg);
1269 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1274 /* "stall" on error */
1278 spin_unlock_irqrestore (&ehci->lock, flags);
1281 EXPORT_SYMBOL_GPL(ehci_hub_control);
1283 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1285 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1287 if (ehci_is_TDI(ehci))
1289 set_owner(ehci, --portnum, PORT_OWNER);
1292 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1294 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1297 if (ehci_is_TDI(ehci))
1299 reg = &ehci->regs->port_status[portnum - 1];
1300 return ehci_readl(ehci, reg) & PORT_OWNER;
1303 static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
1305 struct usb_hcd *hcd = ehci_to_hcd(ehci);
1306 u32 __iomem *status_reg = &ehci->regs->port_status[portnum];
1307 u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
1310 ehci_writel(ehci, temp | PORT_POWER, status_reg);
1312 ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
1314 if (hcd->driver->port_power)
1315 hcd->driver->port_power(hcd, portnum, enable);