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)) {
74 ehci_writel(ehci, status, reg);
79 /* Give the connections some time to appear */
82 spin_lock_irq(&ehci->lock);
83 port = HCS_N_PORTS(ehci->hcs_params);
85 if (test_bit(port, &ehci->owned_ports)) {
86 reg = &ehci->regs->port_status[port];
87 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
89 /* Port already owned by companion? */
90 if (status & PORT_OWNER)
91 clear_bit(port, &ehci->owned_ports);
92 else if (test_bit(port, &ehci->companion_ports))
93 ehci_writel(ehci, status & ~PORT_PE, reg);
95 spin_unlock_irq(&ehci->lock);
96 ehci_hub_control(hcd, SetPortFeature,
97 USB_PORT_FEAT_RESET, port + 1,
99 spin_lock_irq(&ehci->lock);
103 spin_unlock_irq(&ehci->lock);
105 if (!ehci->owned_ports)
107 msleep(90); /* Wait for resets to complete */
109 spin_lock_irq(&ehci->lock);
110 port = HCS_N_PORTS(ehci->hcs_params);
112 if (test_bit(port, &ehci->owned_ports)) {
113 spin_unlock_irq(&ehci->lock);
114 ehci_hub_control(hcd, GetPortStatus,
116 (char *) &buf, sizeof(buf));
117 spin_lock_irq(&ehci->lock);
119 /* The companion should now own the port,
120 * but if something went wrong the port must not
123 reg = &ehci->regs->port_status[port];
124 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
125 if (status & PORT_OWNER)
126 ehci_writel(ehci, status | PORT_CSC, reg);
128 ehci_dbg(ehci, "failed handover port %d: %x\n",
130 ehci_writel(ehci, status & ~PORT_PE, reg);
135 ehci->owned_ports = 0;
136 spin_unlock_irq(&ehci->lock);
139 static int ehci_port_change(struct ehci_hcd *ehci)
141 int i = HCS_N_PORTS(ehci->hcs_params);
143 /* First check if the controller indicates a change event */
145 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
149 * Not all controllers appear to update this while going from D3 to D0,
150 * so check the individual port status registers as well
154 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
160 static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
161 bool suspending, bool do_wakeup)
166 /* If remote wakeup is enabled for the root hub but disabled
167 * for the controller, we must adjust all the port wakeup flags
168 * when the controller is suspended or resumed. In all other
169 * cases they don't need to be changed.
171 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
174 spin_lock_irq(&ehci->lock);
176 /* clear phy low-power mode before changing wakeup flags */
177 if (ehci->has_tdi_phy_lpm) {
178 port = HCS_N_PORTS(ehci->hcs_params);
180 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
182 temp = ehci_readl(ehci, hostpc_reg);
183 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
185 spin_unlock_irq(&ehci->lock);
187 spin_lock_irq(&ehci->lock);
190 port = HCS_N_PORTS(ehci->hcs_params);
192 u32 __iomem *reg = &ehci->regs->port_status[port];
193 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
194 u32 t2 = t1 & ~PORT_WAKE_BITS;
196 /* If we are suspending the controller, clear the flags.
197 * If we are resuming the controller, set the wakeup flags.
200 if (t1 & PORT_CONNECT)
201 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
203 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
205 ehci_writel(ehci, t2, reg);
208 /* enter phy low-power mode again */
209 if (ehci->has_tdi_phy_lpm) {
210 port = HCS_N_PORTS(ehci->hcs_params);
212 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
214 temp = ehci_readl(ehci, hostpc_reg);
215 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
219 /* Does the root hub have a port wakeup pending? */
220 if (!suspending && ehci_port_change(ehci))
221 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
223 spin_unlock_irq(&ehci->lock);
226 static int ehci_bus_suspend (struct usb_hcd *hcd)
228 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
234 ehci_dbg(ehci, "suspend root hub\n");
236 if (time_before (jiffies, ehci->next_statechange))
239 /* stop the schedules */
242 spin_lock_irq (&ehci->lock);
243 if (ehci->rh_state < EHCI_RH_RUNNING)
246 /* Once the controller is stopped, port resumes that are already
247 * in progress won't complete. Hence if remote wakeup is enabled
248 * for the root hub and any ports are in the middle of a resume or
249 * remote wakeup, we must fail the suspend.
251 if (hcd->self.root_hub->do_remote_wakeup) {
252 if (ehci->resuming_ports) {
253 spin_unlock_irq(&ehci->lock);
254 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
259 /* Unlike other USB host controller types, EHCI doesn't have
260 * any notion of "global" or bus-wide suspend. The driver has
261 * to manually suspend all the active unsuspended ports, and
262 * then manually resume them in the bus_resume() routine.
264 ehci->bus_suspended = 0;
265 ehci->owned_ports = 0;
267 fs_idle_delay = false;
268 port = HCS_N_PORTS(ehci->hcs_params);
270 u32 __iomem *reg = &ehci->regs->port_status [port];
271 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
272 u32 t2 = t1 & ~PORT_WAKE_BITS;
274 /* keep track of which ports we suspend */
276 set_bit(port, &ehci->owned_ports);
277 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
279 set_bit(port, &ehci->bus_suspended);
282 /* enable remote wakeup on all ports, if told to do so */
283 if (hcd->self.root_hub->do_remote_wakeup) {
284 /* only enable appropriate wake bits, otherwise the
285 * hardware can not go phy low power mode. If a race
286 * condition happens here(connection change during bits
287 * set), the port change detection will finally fix it.
289 if (t1 & PORT_CONNECT)
290 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
292 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
297 * On some controllers, Wake-On-Disconnect will
298 * generate false wakeup signals until the bus
299 * switches over to full-speed idle. For their
300 * sake, add a delay if we need one.
302 if ((t2 & PORT_WKDISC_E) &&
303 ehci_port_speed(ehci, t2) ==
304 USB_PORT_STAT_HIGH_SPEED)
305 fs_idle_delay = true;
306 ehci_writel(ehci, t2, reg);
310 spin_unlock_irq(&ehci->lock);
312 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
314 * Wait for HCD to enter low-power mode or for the bus
315 * to switch to full-speed idle.
317 usleep_range(5000, 5500);
320 if (changed && ehci->has_tdi_phy_lpm) {
321 spin_lock_irq(&ehci->lock);
322 port = HCS_N_PORTS(ehci->hcs_params);
324 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
327 t3 = ehci_readl(ehci, hostpc_reg);
328 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
329 t3 = ehci_readl(ehci, hostpc_reg);
330 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
331 port, (t3 & HOSTPC_PHCD) ?
332 "succeeded" : "failed");
334 spin_unlock_irq(&ehci->lock);
337 /* Apparently some devices need a >= 1-uframe delay here */
338 if (ehci->bus_suspended)
341 /* turn off now-idle HC */
344 spin_lock_irq(&ehci->lock);
345 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
346 ehci_handle_controller_death(ehci);
347 if (ehci->rh_state != EHCI_RH_RUNNING)
349 ehci->rh_state = EHCI_RH_SUSPENDED;
351 end_unlink_async(ehci);
352 unlink_empty_async_suspended(ehci);
353 ehci_handle_start_intr_unlinks(ehci);
354 ehci_handle_intr_unlinks(ehci);
357 /* allow remote wakeup */
359 if (!hcd->self.root_hub->do_remote_wakeup)
361 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
362 ehci_readl(ehci, &ehci->regs->intr_enable);
365 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
366 ehci->enabled_hrtimer_events = 0;
367 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
368 spin_unlock_irq (&ehci->lock);
370 hrtimer_cancel(&ehci->hrtimer);
375 /* caller has locked the root hub, and should reset/reinit on error */
376 static int ehci_bus_resume (struct usb_hcd *hcd)
378 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
382 unsigned long resume_needed = 0;
384 if (time_before (jiffies, ehci->next_statechange))
386 spin_lock_irq (&ehci->lock);
387 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
390 if (unlikely(ehci->debug)) {
391 if (!dbgp_reset_prep(hcd))
394 dbgp_external_startup(hcd);
397 /* Ideally and we've got a real resume here, and no port's power
398 * was lost. (For PCI, that means Vaux was maintained.) But we
399 * could instead be restoring a swsusp snapshot -- so that BIOS was
400 * the last user of the controller, not reset/pm hardware keeping
401 * state we gave to it.
403 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
404 ehci_dbg(ehci, "resume root hub%s\n",
405 power_okay ? "" : " after power loss");
407 /* at least some APM implementations will try to deliver
408 * IRQs right away, so delay them until we're ready.
410 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
412 /* re-init operational registers */
413 ehci_writel(ehci, 0, &ehci->regs->segment);
414 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
415 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
417 /* restore CMD_RUN, framelist size, and irq threshold */
418 ehci->command |= CMD_RUN;
419 ehci_writel(ehci, ehci->command, &ehci->regs->command);
420 ehci->rh_state = EHCI_RH_RUNNING;
423 * According to Bugzilla #8190, the port status for some controllers
424 * will be wrong without a delay. At their wrong status, the port
425 * is enabled, but not suspended neither resumed.
427 i = HCS_N_PORTS(ehci->hcs_params);
429 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
430 if ((temp & PORT_PE) &&
431 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
432 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
433 spin_unlock_irq(&ehci->lock);
435 spin_lock_irq(&ehci->lock);
443 /* clear phy low-power mode before resume */
444 if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
445 i = HCS_N_PORTS(ehci->hcs_params);
447 if (test_bit(i, &ehci->bus_suspended)) {
448 u32 __iomem *hostpc_reg =
449 &ehci->regs->hostpc[i];
451 temp = ehci_readl(ehci, hostpc_reg);
452 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
456 spin_unlock_irq(&ehci->lock);
458 spin_lock_irq(&ehci->lock);
463 /* manually resume the ports we suspended during bus_suspend() */
464 i = HCS_N_PORTS (ehci->hcs_params);
466 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
467 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
468 if (test_bit(i, &ehci->bus_suspended) &&
469 (temp & PORT_SUSPEND)) {
471 set_bit(i, &resume_needed);
473 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
476 /* msleep for 20ms only if code is trying to resume port */
478 spin_unlock_irq(&ehci->lock);
480 spin_lock_irq(&ehci->lock);
485 i = HCS_N_PORTS (ehci->hcs_params);
487 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
488 if (test_bit(i, &resume_needed)) {
489 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
490 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
494 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
495 spin_unlock_irq(&ehci->lock);
497 ehci_handover_companion_ports(ehci);
499 /* Now we can safely re-enable irqs */
500 spin_lock_irq(&ehci->lock);
503 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
504 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
505 spin_unlock_irq(&ehci->lock);
510 spin_unlock_irq(&ehci->lock);
516 #define ehci_bus_suspend NULL
517 #define ehci_bus_resume NULL
519 #endif /* CONFIG_PM */
521 /*-------------------------------------------------------------------------*/
524 * Sets the owner of a port
526 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
528 u32 __iomem *status_reg;
532 status_reg = &ehci->regs->port_status[portnum];
535 * The controller won't set the OWNER bit if the port is
536 * enabled, so this loop will sometimes require at least two
537 * iterations: one to disable the port and one to set OWNER.
539 for (try = 4; try > 0; --try) {
540 spin_lock_irq(&ehci->lock);
541 port_status = ehci_readl(ehci, status_reg);
542 if ((port_status & PORT_OWNER) == new_owner
543 || (port_status & (PORT_OWNER | PORT_CONNECT))
547 port_status ^= PORT_OWNER;
548 port_status &= ~(PORT_PE | PORT_RWC_BITS);
549 ehci_writel(ehci, port_status, status_reg);
551 spin_unlock_irq(&ehci->lock);
557 /*-------------------------------------------------------------------------*/
559 static int check_reset_complete (
560 struct ehci_hcd *ehci,
562 u32 __iomem *status_reg,
565 if (!(port_status & PORT_CONNECT))
568 /* if reset finished and it's still not enabled -- handoff */
569 if (!(port_status & PORT_PE)) {
571 /* with integrated TT, there's nobody to hand it to! */
572 if (ehci_is_TDI(ehci)) {
574 "Failed to enable port %d on root hub TT\n",
579 ehci_dbg (ehci, "port %d full speed --> companion\n",
582 // what happens if HCS_N_CC(params) == 0 ?
583 port_status |= PORT_OWNER;
584 port_status &= ~PORT_RWC_BITS;
585 ehci_writel(ehci, port_status, status_reg);
587 /* ensure 440EPX ohci controller state is operational */
588 if (ehci->has_amcc_usb23)
589 set_ohci_hcfs(ehci, 1);
591 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
593 /* ensure 440EPx ohci controller state is suspended */
594 if (ehci->has_amcc_usb23)
595 set_ohci_hcfs(ehci, 0);
601 /*-------------------------------------------------------------------------*/
604 /* build "status change" packet (one or two bytes) from HC registers */
607 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
609 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
612 int ports, i, retval = 1;
616 /* init status to no-changes */
618 ports = HCS_N_PORTS (ehci->hcs_params);
624 /* Inform the core about resumes-in-progress by returning
625 * a non-zero value even if there are no status changes.
627 status = ehci->resuming_ports;
629 /* Some boards (mostly VIA?) report bogus overcurrent indications,
630 * causing massive log spam unless we completely ignore them. It
631 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
632 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
633 * PORT_POWER; that's surprising, but maybe within-spec.
636 mask = PORT_CSC | PORT_PEC | PORT_OCC;
638 mask = PORT_CSC | PORT_PEC;
639 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
641 /* no hub change reports (bit 0) for now (power, ...) */
643 /* port N changes (bit N)? */
644 spin_lock_irqsave (&ehci->lock, flags);
646 /* get per-port change detect bits */
648 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
650 for (i = 0; i < ports; i++) {
651 /* leverage per-port change bits feature */
653 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
658 * Return status information even for ports with OWNER set.
659 * Otherwise khubd wouldn't see the disconnect event when a
660 * high-speed device is switched over to the companion
661 * controller by the user.
664 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
665 || (ehci->reset_done[i] && time_after_eq(
666 jiffies, ehci->reset_done[i]))) {
668 buf [0] |= 1 << (i + 1);
670 buf [1] |= 1 << (i - 7);
675 /* If a resume is in progress, make sure it can finish */
676 if (ehci->resuming_ports)
677 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
679 spin_unlock_irqrestore (&ehci->lock, flags);
680 return status ? retval : 0;
683 /*-------------------------------------------------------------------------*/
686 ehci_hub_descriptor (
687 struct ehci_hcd *ehci,
688 struct usb_hub_descriptor *desc
690 int ports = HCS_N_PORTS (ehci->hcs_params);
693 desc->bDescriptorType = 0x29;
694 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
695 desc->bHubContrCurrent = 0;
697 desc->bNbrPorts = ports;
698 temp = 1 + (ports / 8);
699 desc->bDescLength = 7 + 2 * temp;
701 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
702 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
703 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
705 temp = 0x0008; /* per-port overcurrent reporting */
706 if (HCS_PPC (ehci->hcs_params))
707 temp |= 0x0001; /* per-port power control */
709 temp |= 0x0002; /* no power switching */
711 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
712 if (HCS_INDICATOR (ehci->hcs_params))
713 temp |= 0x0080; /* per-port indicators (LEDs) */
715 desc->wHubCharacteristics = cpu_to_le16(temp);
718 /*-------------------------------------------------------------------------*/
719 #ifdef CONFIG_USB_HCD_TEST_MODE
721 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
723 static void usb_ehset_completion(struct urb *urb)
725 struct completion *done = urb->context;
729 static int submit_single_step_set_feature(
736 * Allocate and initialize a control URB. This request will be used by the
737 * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
738 * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
739 * Return NULL if failed.
741 static struct urb *request_single_step_set_feature_urb(
742 struct usb_device *udev,
745 struct completion *done
748 struct usb_hcd *hcd = bus_to_hcd(udev->bus);
749 struct usb_host_endpoint *ep;
751 urb = usb_alloc_urb(0, GFP_KERNEL);
755 urb->pipe = usb_rcvctrlpipe(udev, 0);
756 ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
757 [usb_pipeendpoint(urb->pipe)];
765 urb->setup_packet = (void *)dr;
766 urb->transfer_buffer = buf;
767 urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
768 urb->complete = usb_ehset_completion;
769 urb->status = -EINPROGRESS;
770 urb->actual_length = 0;
771 urb->transfer_flags = URB_DIR_IN;
773 atomic_inc(&urb->use_count);
774 atomic_inc(&urb->dev->urbnum);
775 urb->setup_dma = dma_map_single(
776 hcd->self.controller,
778 sizeof(struct usb_ctrlrequest),
780 urb->transfer_dma = dma_map_single(
781 hcd->self.controller,
782 urb->transfer_buffer,
783 urb->transfer_buffer_length,
789 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
791 int retval = -ENOMEM;
792 struct usb_ctrlrequest *dr;
794 struct usb_device *udev;
795 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
796 struct usb_device_descriptor *buf;
797 DECLARE_COMPLETION_ONSTACK(done);
799 /* Obtain udev of the rhub's child port */
800 udev = usb_hub_find_child(hcd->self.root_hub, port);
802 ehci_err(ehci, "No device attached to the RootHub\n");
805 buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
809 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
815 /* Fill Setup packet for GetDescriptor */
816 dr->bRequestType = USB_DIR_IN;
817 dr->bRequest = USB_REQ_GET_DESCRIPTOR;
818 dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
820 dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
821 urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
825 /* Submit just the SETUP stage */
826 retval = submit_single_step_set_feature(hcd, urb, 1);
829 if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
832 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
837 /* Complete remaining DATA and STATUS stages using the same URB */
838 urb->status = -EINPROGRESS;
840 atomic_inc(&urb->use_count);
841 atomic_inc(&urb->dev->urbnum);
842 retval = submit_single_step_set_feature(hcd, urb, 0);
843 if (!retval && !wait_for_completion_timeout(&done,
844 msecs_to_jiffies(2000))) {
847 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
856 #endif /* CONFIG_USB_HCD_TEST_MODE */
857 /*-------------------------------------------------------------------------*/
859 int ehci_hub_control(
867 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
868 int ports = HCS_N_PORTS (ehci->hcs_params);
869 u32 __iomem *status_reg = &ehci->regs->port_status[
870 (wIndex & 0xff) - 1];
871 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
872 u32 temp, temp1, status;
878 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
879 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
880 * (track current state ourselves) ... blink for diagnostics,
881 * power, "this is the one", etc. EHCI spec supports this.
884 spin_lock_irqsave (&ehci->lock, flags);
886 case ClearHubFeature:
888 case C_HUB_LOCAL_POWER:
889 case C_HUB_OVER_CURRENT:
890 /* no hub-wide feature/status flags */
896 case ClearPortFeature:
897 if (!wIndex || wIndex > ports)
900 temp = ehci_readl(ehci, status_reg);
901 temp &= ~PORT_RWC_BITS;
904 * Even if OWNER is set, so the port is owned by the
905 * companion controller, khubd needs to be able to clear
906 * the port-change status bits (especially
907 * USB_PORT_STAT_C_CONNECTION).
911 case USB_PORT_FEAT_ENABLE:
912 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
914 case USB_PORT_FEAT_C_ENABLE:
915 ehci_writel(ehci, temp | PORT_PEC, status_reg);
917 case USB_PORT_FEAT_SUSPEND:
918 if (temp & PORT_RESET)
920 if (ehci->no_selective_suspend)
922 #ifdef CONFIG_USB_OTG
923 if ((hcd->self.otg_port == (wIndex + 1))
924 && hcd->self.b_hnp_enable) {
925 otg_start_hnp(hcd->phy->otg);
929 if (!(temp & PORT_SUSPEND))
931 if ((temp & PORT_PE) == 0)
934 /* clear phy low-power mode before resume */
935 if (ehci->has_tdi_phy_lpm) {
936 temp1 = ehci_readl(ehci, hostpc_reg);
937 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
939 spin_unlock_irqrestore(&ehci->lock, flags);
940 msleep(5);/* wait to leave low-power mode */
941 spin_lock_irqsave(&ehci->lock, flags);
943 /* resume signaling for 20 msec */
944 temp &= ~PORT_WAKE_BITS;
945 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
946 ehci->reset_done[wIndex] = jiffies
947 + msecs_to_jiffies(20);
948 set_bit(wIndex, &ehci->resuming_ports);
949 usb_hcd_start_port_resume(&hcd->self, wIndex);
951 case USB_PORT_FEAT_C_SUSPEND:
952 clear_bit(wIndex, &ehci->port_c_suspend);
954 case USB_PORT_FEAT_POWER:
955 if (HCS_PPC (ehci->hcs_params))
956 ehci_writel(ehci, temp & ~PORT_POWER,
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. khubd will turn the power back on.
1005 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1006 && HCS_PPC(ehci->hcs_params)) {
1008 temp & ~(PORT_RWC_BITS | PORT_POWER),
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 khubd
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 ehci_writel(ehci, temp | PORT_POWER,
1194 case USB_PORT_FEAT_RESET:
1195 if (temp & (PORT_SUSPEND|PORT_RESUME))
1197 /* line status bits may report this as low speed,
1198 * which can be fine if this root hub has a
1199 * transaction translator built in.
1201 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1202 && !ehci_is_TDI(ehci)
1203 && PORT_USB11 (temp)) {
1205 "port %d low speed --> companion\n",
1213 * caller must wait, then call GetPortStatus
1214 * usb 2.0 spec says 50 ms resets on root
1216 ehci->reset_done [wIndex] = jiffies
1217 + msecs_to_jiffies (50);
1219 ehci_writel(ehci, temp, status_reg);
1222 /* For downstream facing ports (these): one hub port is put
1223 * into test mode according to USB2 11.24.2.13, then the hub
1224 * must be reset (which for root hub now means rmmod+modprobe,
1225 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1226 * about the EHCI-specific stuff.
1228 case USB_PORT_FEAT_TEST:
1229 #ifdef CONFIG_USB_HCD_TEST_MODE
1230 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1231 spin_unlock_irqrestore(&ehci->lock, flags);
1232 retval = ehset_single_step_set_feature(hcd,
1234 spin_lock_irqsave(&ehci->lock, flags);
1238 if (!selector || selector > 5)
1240 spin_unlock_irqrestore(&ehci->lock, flags);
1242 spin_lock_irqsave(&ehci->lock, flags);
1244 /* Put all enabled ports into suspend */
1247 &ehci->regs->port_status[ports];
1249 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1251 ehci_writel(ehci, temp | PORT_SUSPEND,
1255 spin_unlock_irqrestore(&ehci->lock, flags);
1257 spin_lock_irqsave(&ehci->lock, flags);
1259 temp = ehci_readl(ehci, status_reg);
1260 temp |= selector << 16;
1261 ehci_writel(ehci, temp, status_reg);
1267 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1272 /* "stall" on error */
1276 spin_unlock_irqrestore (&ehci->lock, flags);
1279 EXPORT_SYMBOL_GPL(ehci_hub_control);
1281 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1283 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1285 if (ehci_is_TDI(ehci))
1287 set_owner(ehci, --portnum, PORT_OWNER);
1290 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1292 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1295 if (ehci_is_TDI(ehci))
1297 reg = &ehci->regs->port_status[portnum - 1];
1298 return ehci_readl(ehci, reg) & PORT_OWNER;