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 ehci_hub_control(
45 static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
47 return !udev->maxchild && udev->persist_enabled &&
48 udev->bus->root_hub->speed < USB_SPEED_HIGH;
51 /* After a power loss, ports that were owned by the companion must be
52 * reset so that the companion can still own them.
54 static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
60 struct usb_hcd *hcd = ehci_to_hcd(ehci);
62 if (!ehci->owned_ports)
66 * USB 1.1 devices are mostly HIDs, which don't need to persist across
67 * suspends. If we ensure that none of our companion's devices have
68 * persist_enabled (by looking through all USB 1.1 buses in the system),
69 * we can skip this and avoid slowing resume down. Devices without
70 * persist will just get reenumerated shortly after resume anyway.
72 if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
75 /* Make sure the ports are powered */
76 port = HCS_N_PORTS(ehci->hcs_params);
78 if (test_bit(port, &ehci->owned_ports)) {
79 reg = &ehci->regs->port_status[port];
80 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
81 if (!(status & PORT_POWER)) {
83 ehci_writel(ehci, status, reg);
88 /* Give the connections some time to appear */
91 spin_lock_irq(&ehci->lock);
92 port = HCS_N_PORTS(ehci->hcs_params);
94 if (test_bit(port, &ehci->owned_ports)) {
95 reg = &ehci->regs->port_status[port];
96 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
98 /* Port already owned by companion? */
99 if (status & PORT_OWNER)
100 clear_bit(port, &ehci->owned_ports);
101 else if (test_bit(port, &ehci->companion_ports))
102 ehci_writel(ehci, status & ~PORT_PE, reg);
104 spin_unlock_irq(&ehci->lock);
105 ehci_hub_control(hcd, SetPortFeature,
106 USB_PORT_FEAT_RESET, port + 1,
108 spin_lock_irq(&ehci->lock);
112 spin_unlock_irq(&ehci->lock);
114 if (!ehci->owned_ports)
116 msleep(90); /* Wait for resets to complete */
118 spin_lock_irq(&ehci->lock);
119 port = HCS_N_PORTS(ehci->hcs_params);
121 if (test_bit(port, &ehci->owned_ports)) {
122 spin_unlock_irq(&ehci->lock);
123 ehci_hub_control(hcd, GetPortStatus,
125 (char *) &buf, sizeof(buf));
126 spin_lock_irq(&ehci->lock);
128 /* The companion should now own the port,
129 * but if something went wrong the port must not
132 reg = &ehci->regs->port_status[port];
133 status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
134 if (status & PORT_OWNER)
135 ehci_writel(ehci, status | PORT_CSC, reg);
137 ehci_dbg(ehci, "failed handover port %d: %x\n",
139 ehci_writel(ehci, status & ~PORT_PE, reg);
144 ehci->owned_ports = 0;
145 spin_unlock_irq(&ehci->lock);
148 static int ehci_port_change(struct ehci_hcd *ehci)
150 int i = HCS_N_PORTS(ehci->hcs_params);
152 /* First check if the controller indicates a change event */
154 if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
158 * Not all controllers appear to update this while going from D3 to D0,
159 * so check the individual port status registers as well
163 if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
169 static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
170 bool suspending, bool do_wakeup)
175 /* If remote wakeup is enabled for the root hub but disabled
176 * for the controller, we must adjust all the port wakeup flags
177 * when the controller is suspended or resumed. In all other
178 * cases they don't need to be changed.
180 if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
183 spin_lock_irq(&ehci->lock);
185 /* clear phy low-power mode before changing wakeup flags */
186 if (ehci->has_tdi_phy_lpm) {
187 port = HCS_N_PORTS(ehci->hcs_params);
189 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
191 temp = ehci_readl(ehci, hostpc_reg);
192 ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
194 spin_unlock_irq(&ehci->lock);
196 spin_lock_irq(&ehci->lock);
199 port = HCS_N_PORTS(ehci->hcs_params);
201 u32 __iomem *reg = &ehci->regs->port_status[port];
202 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
203 u32 t2 = t1 & ~PORT_WAKE_BITS;
205 /* If we are suspending the controller, clear the flags.
206 * If we are resuming the controller, set the wakeup flags.
209 if (t1 & PORT_CONNECT)
210 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
212 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
214 ehci_writel(ehci, t2, reg);
217 /* enter phy low-power mode again */
218 if (ehci->has_tdi_phy_lpm) {
219 port = HCS_N_PORTS(ehci->hcs_params);
221 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
223 temp = ehci_readl(ehci, hostpc_reg);
224 ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
228 /* Does the root hub have a port wakeup pending? */
229 if (!suspending && ehci_port_change(ehci))
230 usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
232 spin_unlock_irq(&ehci->lock);
235 static int ehci_bus_suspend (struct usb_hcd *hcd)
237 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
243 ehci_dbg(ehci, "suspend root hub\n");
245 if (time_before (jiffies, ehci->next_statechange))
248 /* stop the schedules */
251 spin_lock_irq (&ehci->lock);
252 if (ehci->rh_state < EHCI_RH_RUNNING)
255 /* Once the controller is stopped, port resumes that are already
256 * in progress won't complete. Hence if remote wakeup is enabled
257 * for the root hub and any ports are in the middle of a resume or
258 * remote wakeup, we must fail the suspend.
260 if (hcd->self.root_hub->do_remote_wakeup) {
261 if (ehci->resuming_ports) {
262 spin_unlock_irq(&ehci->lock);
263 ehci_dbg(ehci, "suspend failed because a port is resuming\n");
268 /* Unlike other USB host controller types, EHCI doesn't have
269 * any notion of "global" or bus-wide suspend. The driver has
270 * to manually suspend all the active unsuspended ports, and
271 * then manually resume them in the bus_resume() routine.
273 ehci->bus_suspended = 0;
274 ehci->owned_ports = 0;
276 fs_idle_delay = false;
277 port = HCS_N_PORTS(ehci->hcs_params);
279 u32 __iomem *reg = &ehci->regs->port_status [port];
280 u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
281 u32 t2 = t1 & ~PORT_WAKE_BITS;
283 /* keep track of which ports we suspend */
285 set_bit(port, &ehci->owned_ports);
286 else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
288 set_bit(port, &ehci->bus_suspended);
291 /* enable remote wakeup on all ports, if told to do so */
292 if (hcd->self.root_hub->do_remote_wakeup) {
293 /* only enable appropriate wake bits, otherwise the
294 * hardware can not go phy low power mode. If a race
295 * condition happens here(connection change during bits
296 * set), the port change detection will finally fix it.
298 if (t1 & PORT_CONNECT)
299 t2 |= PORT_WKOC_E | PORT_WKDISC_E;
301 t2 |= PORT_WKOC_E | PORT_WKCONN_E;
306 * On some controllers, Wake-On-Disconnect will
307 * generate false wakeup signals until the bus
308 * switches over to full-speed idle. For their
309 * sake, add a delay if we need one.
311 if ((t2 & PORT_WKDISC_E) &&
312 ehci_port_speed(ehci, t2) ==
313 USB_PORT_STAT_HIGH_SPEED)
314 fs_idle_delay = true;
315 ehci_writel(ehci, t2, reg);
319 spin_unlock_irq(&ehci->lock);
321 if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
323 * Wait for HCD to enter low-power mode or for the bus
324 * to switch to full-speed idle.
326 usleep_range(5000, 5500);
329 if (changed && ehci->has_tdi_phy_lpm) {
330 spin_lock_irq(&ehci->lock);
331 port = HCS_N_PORTS(ehci->hcs_params);
333 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
336 t3 = ehci_readl(ehci, hostpc_reg);
337 ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
338 t3 = ehci_readl(ehci, hostpc_reg);
339 ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
340 port, (t3 & HOSTPC_PHCD) ?
341 "succeeded" : "failed");
343 spin_unlock_irq(&ehci->lock);
346 /* Apparently some devices need a >= 1-uframe delay here */
347 if (ehci->bus_suspended)
350 /* turn off now-idle HC */
353 spin_lock_irq(&ehci->lock);
354 if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
355 ehci_handle_controller_death(ehci);
356 if (ehci->rh_state != EHCI_RH_RUNNING)
358 ehci->rh_state = EHCI_RH_SUSPENDED;
360 end_unlink_async(ehci);
361 unlink_empty_async_suspended(ehci);
362 ehci_handle_start_intr_unlinks(ehci);
363 ehci_handle_intr_unlinks(ehci);
366 /* allow remote wakeup */
368 if (!hcd->self.root_hub->do_remote_wakeup)
370 ehci_writel(ehci, mask, &ehci->regs->intr_enable);
371 ehci_readl(ehci, &ehci->regs->intr_enable);
374 ehci->next_statechange = jiffies + msecs_to_jiffies(10);
375 ehci->enabled_hrtimer_events = 0;
376 ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
377 spin_unlock_irq (&ehci->lock);
379 hrtimer_cancel(&ehci->hrtimer);
384 /* caller has locked the root hub, and should reset/reinit on error */
385 static int ehci_bus_resume (struct usb_hcd *hcd)
387 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
391 unsigned long resume_needed = 0;
393 if (time_before (jiffies, ehci->next_statechange))
395 spin_lock_irq (&ehci->lock);
396 if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
399 if (unlikely(ehci->debug)) {
400 if (!dbgp_reset_prep(hcd))
403 dbgp_external_startup(hcd);
406 /* Ideally and we've got a real resume here, and no port's power
407 * was lost. (For PCI, that means Vaux was maintained.) But we
408 * could instead be restoring a swsusp snapshot -- so that BIOS was
409 * the last user of the controller, not reset/pm hardware keeping
410 * state we gave to it.
412 power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
413 ehci_dbg(ehci, "resume root hub%s\n",
414 power_okay ? "" : " after power loss");
416 /* at least some APM implementations will try to deliver
417 * IRQs right away, so delay them until we're ready.
419 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
421 /* re-init operational registers */
422 ehci_writel(ehci, 0, &ehci->regs->segment);
423 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
424 ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
426 /* restore CMD_RUN, framelist size, and irq threshold */
427 ehci->command |= CMD_RUN;
428 ehci_writel(ehci, ehci->command, &ehci->regs->command);
429 ehci->rh_state = EHCI_RH_RUNNING;
432 * According to Bugzilla #8190, the port status for some controllers
433 * will be wrong without a delay. At their wrong status, the port
434 * is enabled, but not suspended neither resumed.
436 i = HCS_N_PORTS(ehci->hcs_params);
438 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
439 if ((temp & PORT_PE) &&
440 !(temp & (PORT_SUSPEND | PORT_RESUME))) {
441 ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp);
442 spin_unlock_irq(&ehci->lock);
444 spin_lock_irq(&ehci->lock);
452 /* clear phy low-power mode before resume */
453 if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
454 i = HCS_N_PORTS(ehci->hcs_params);
456 if (test_bit(i, &ehci->bus_suspended)) {
457 u32 __iomem *hostpc_reg =
458 &ehci->regs->hostpc[i];
460 temp = ehci_readl(ehci, hostpc_reg);
461 ehci_writel(ehci, temp & ~HOSTPC_PHCD,
465 spin_unlock_irq(&ehci->lock);
467 spin_lock_irq(&ehci->lock);
472 /* manually resume the ports we suspended during bus_suspend() */
473 i = HCS_N_PORTS (ehci->hcs_params);
475 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
476 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
477 if (test_bit(i, &ehci->bus_suspended) &&
478 (temp & PORT_SUSPEND)) {
480 set_bit(i, &resume_needed);
482 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
485 /* msleep for 20ms only if code is trying to resume port */
487 spin_unlock_irq(&ehci->lock);
489 spin_lock_irq(&ehci->lock);
494 i = HCS_N_PORTS (ehci->hcs_params);
496 temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
497 if (test_bit(i, &resume_needed)) {
498 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
499 ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
503 ehci->next_statechange = jiffies + msecs_to_jiffies(5);
504 spin_unlock_irq(&ehci->lock);
506 ehci_handover_companion_ports(ehci);
508 /* Now we can safely re-enable irqs */
509 spin_lock_irq(&ehci->lock);
512 ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
513 (void) ehci_readl(ehci, &ehci->regs->intr_enable);
514 spin_unlock_irq(&ehci->lock);
519 spin_unlock_irq(&ehci->lock);
525 #define ehci_bus_suspend NULL
526 #define ehci_bus_resume NULL
528 #endif /* CONFIG_PM */
530 /*-------------------------------------------------------------------------*/
533 * Sets the owner of a port
535 static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
537 u32 __iomem *status_reg;
541 status_reg = &ehci->regs->port_status[portnum];
544 * The controller won't set the OWNER bit if the port is
545 * enabled, so this loop will sometimes require at least two
546 * iterations: one to disable the port and one to set OWNER.
548 for (try = 4; try > 0; --try) {
549 spin_lock_irq(&ehci->lock);
550 port_status = ehci_readl(ehci, status_reg);
551 if ((port_status & PORT_OWNER) == new_owner
552 || (port_status & (PORT_OWNER | PORT_CONNECT))
556 port_status ^= PORT_OWNER;
557 port_status &= ~(PORT_PE | PORT_RWC_BITS);
558 ehci_writel(ehci, port_status, status_reg);
560 spin_unlock_irq(&ehci->lock);
566 /*-------------------------------------------------------------------------*/
568 static int check_reset_complete (
569 struct ehci_hcd *ehci,
571 u32 __iomem *status_reg,
574 if (!(port_status & PORT_CONNECT))
577 /* if reset finished and it's still not enabled -- handoff */
578 if (!(port_status & PORT_PE)) {
580 /* with integrated TT, there's nobody to hand it to! */
581 if (ehci_is_TDI(ehci)) {
583 "Failed to enable port %d on root hub TT\n",
588 ehci_dbg (ehci, "port %d full speed --> companion\n",
591 // what happens if HCS_N_CC(params) == 0 ?
592 port_status |= PORT_OWNER;
593 port_status &= ~PORT_RWC_BITS;
594 ehci_writel(ehci, port_status, status_reg);
596 /* ensure 440EPX ohci controller state is operational */
597 if (ehci->has_amcc_usb23)
598 set_ohci_hcfs(ehci, 1);
600 ehci_dbg(ehci, "port %d reset complete, port enabled\n",
602 /* ensure 440EPx ohci controller state is suspended */
603 if (ehci->has_amcc_usb23)
604 set_ohci_hcfs(ehci, 0);
610 /*-------------------------------------------------------------------------*/
613 /* build "status change" packet (one or two bytes) from HC registers */
616 ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
618 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
621 int ports, i, retval = 1;
625 /* init status to no-changes */
627 ports = HCS_N_PORTS (ehci->hcs_params);
633 /* Inform the core about resumes-in-progress by returning
634 * a non-zero value even if there are no status changes.
636 status = ehci->resuming_ports;
638 /* Some boards (mostly VIA?) report bogus overcurrent indications,
639 * causing massive log spam unless we completely ignore them. It
640 * may be relevant that VIA VT8235 controllers, where PORT_POWER is
641 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
642 * PORT_POWER; that's surprising, but maybe within-spec.
645 mask = PORT_CSC | PORT_PEC | PORT_OCC;
647 mask = PORT_CSC | PORT_PEC;
648 // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
650 /* no hub change reports (bit 0) for now (power, ...) */
652 /* port N changes (bit N)? */
653 spin_lock_irqsave (&ehci->lock, flags);
655 /* get per-port change detect bits */
657 ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
659 for (i = 0; i < ports; i++) {
660 /* leverage per-port change bits feature */
662 temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
667 * Return status information even for ports with OWNER set.
668 * Otherwise khubd wouldn't see the disconnect event when a
669 * high-speed device is switched over to the companion
670 * controller by the user.
673 if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
674 || (ehci->reset_done[i] && time_after_eq(
675 jiffies, ehci->reset_done[i]))) {
677 buf [0] |= 1 << (i + 1);
679 buf [1] |= 1 << (i - 7);
684 /* If a resume is in progress, make sure it can finish */
685 if (ehci->resuming_ports)
686 mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
688 spin_unlock_irqrestore (&ehci->lock, flags);
689 return status ? retval : 0;
692 /*-------------------------------------------------------------------------*/
695 ehci_hub_descriptor (
696 struct ehci_hcd *ehci,
697 struct usb_hub_descriptor *desc
699 int ports = HCS_N_PORTS (ehci->hcs_params);
702 desc->bDescriptorType = 0x29;
703 desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
704 desc->bHubContrCurrent = 0;
706 desc->bNbrPorts = ports;
707 temp = 1 + (ports / 8);
708 desc->bDescLength = 7 + 2 * temp;
710 /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
711 memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
712 memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
714 temp = 0x0008; /* per-port overcurrent reporting */
715 if (HCS_PPC (ehci->hcs_params))
716 temp |= 0x0001; /* per-port power control */
718 temp |= 0x0002; /* no power switching */
720 // re-enable when we support USB_PORT_FEAT_INDICATOR below.
721 if (HCS_INDICATOR (ehci->hcs_params))
722 temp |= 0x0080; /* per-port indicators (LEDs) */
724 desc->wHubCharacteristics = cpu_to_le16(temp);
727 /*-------------------------------------------------------------------------*/
728 #ifdef CONFIG_USB_HCD_TEST_MODE
730 #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06
732 static void usb_ehset_completion(struct urb *urb)
734 struct completion *done = urb->context;
738 static int submit_single_step_set_feature(
745 * Allocate and initialize a control URB. This request will be used by the
746 * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages
747 * of the GetDescriptor request are sent 15 seconds after the SETUP stage.
748 * Return NULL if failed.
750 static struct urb *request_single_step_set_feature_urb(
751 struct usb_device *udev,
754 struct completion *done
757 struct usb_hcd *hcd = bus_to_hcd(udev->bus);
758 struct usb_host_endpoint *ep;
760 urb = usb_alloc_urb(0, GFP_KERNEL);
764 urb->pipe = usb_rcvctrlpipe(udev, 0);
765 ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out)
766 [usb_pipeendpoint(urb->pipe)];
774 urb->setup_packet = (void *)dr;
775 urb->transfer_buffer = buf;
776 urb->transfer_buffer_length = USB_DT_DEVICE_SIZE;
777 urb->complete = usb_ehset_completion;
778 urb->status = -EINPROGRESS;
779 urb->actual_length = 0;
780 urb->transfer_flags = URB_DIR_IN;
782 atomic_inc(&urb->use_count);
783 atomic_inc(&urb->dev->urbnum);
784 urb->setup_dma = dma_map_single(
785 hcd->self.controller,
787 sizeof(struct usb_ctrlrequest),
789 urb->transfer_dma = dma_map_single(
790 hcd->self.controller,
791 urb->transfer_buffer,
792 urb->transfer_buffer_length,
798 static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port)
800 int retval = -ENOMEM;
801 struct usb_ctrlrequest *dr;
803 struct usb_device *udev;
804 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
805 struct usb_device_descriptor *buf;
806 DECLARE_COMPLETION_ONSTACK(done);
808 /* Obtain udev of the rhub's child port */
809 udev = usb_hub_find_child(hcd->self.root_hub, port);
811 ehci_err(ehci, "No device attached to the RootHub\n");
814 buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
818 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
824 /* Fill Setup packet for GetDescriptor */
825 dr->bRequestType = USB_DIR_IN;
826 dr->bRequest = USB_REQ_GET_DESCRIPTOR;
827 dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8);
829 dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE);
830 urb = request_single_step_set_feature_urb(udev, dr, buf, &done);
834 /* Submit just the SETUP stage */
835 retval = submit_single_step_set_feature(hcd, urb, 1);
838 if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) {
841 ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__);
846 /* Complete remaining DATA and STATUS stages using the same URB */
847 urb->status = -EINPROGRESS;
849 atomic_inc(&urb->use_count);
850 atomic_inc(&urb->dev->urbnum);
851 retval = submit_single_step_set_feature(hcd, urb, 0);
852 if (!retval && !wait_for_completion_timeout(&done,
853 msecs_to_jiffies(2000))) {
856 ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__);
865 #endif /* CONFIG_USB_HCD_TEST_MODE */
866 /*-------------------------------------------------------------------------*/
868 static int ehci_hub_control (
876 struct ehci_hcd *ehci = hcd_to_ehci (hcd);
877 int ports = HCS_N_PORTS (ehci->hcs_params);
878 u32 __iomem *status_reg = &ehci->regs->port_status[
879 (wIndex & 0xff) - 1];
880 u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
881 u32 temp, temp1, status;
887 * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
888 * HCS_INDICATOR may say we can change LEDs to off/amber/green.
889 * (track current state ourselves) ... blink for diagnostics,
890 * power, "this is the one", etc. EHCI spec supports this.
893 spin_lock_irqsave (&ehci->lock, flags);
895 case ClearHubFeature:
897 case C_HUB_LOCAL_POWER:
898 case C_HUB_OVER_CURRENT:
899 /* no hub-wide feature/status flags */
905 case ClearPortFeature:
906 if (!wIndex || wIndex > ports)
909 temp = ehci_readl(ehci, status_reg);
910 temp &= ~PORT_RWC_BITS;
913 * Even if OWNER is set, so the port is owned by the
914 * companion controller, khubd needs to be able to clear
915 * the port-change status bits (especially
916 * USB_PORT_STAT_C_CONNECTION).
920 case USB_PORT_FEAT_ENABLE:
921 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
923 case USB_PORT_FEAT_C_ENABLE:
924 ehci_writel(ehci, temp | PORT_PEC, status_reg);
926 case USB_PORT_FEAT_SUSPEND:
927 if (temp & PORT_RESET)
929 if (ehci->no_selective_suspend)
931 #ifdef CONFIG_USB_OTG
932 if ((hcd->self.otg_port == (wIndex + 1))
933 && hcd->self.b_hnp_enable) {
934 otg_start_hnp(hcd->phy->otg);
938 if (!(temp & PORT_SUSPEND))
940 if ((temp & PORT_PE) == 0)
943 /* clear phy low-power mode before resume */
944 if (ehci->has_tdi_phy_lpm) {
945 temp1 = ehci_readl(ehci, hostpc_reg);
946 ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
948 spin_unlock_irqrestore(&ehci->lock, flags);
949 msleep(5);/* wait to leave low-power mode */
950 spin_lock_irqsave(&ehci->lock, flags);
952 /* resume signaling for 20 msec */
953 temp &= ~PORT_WAKE_BITS;
954 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
955 ehci->reset_done[wIndex] = jiffies
956 + msecs_to_jiffies(20);
957 set_bit(wIndex, &ehci->resuming_ports);
958 usb_hcd_start_port_resume(&hcd->self, wIndex);
960 case USB_PORT_FEAT_C_SUSPEND:
961 clear_bit(wIndex, &ehci->port_c_suspend);
963 case USB_PORT_FEAT_POWER:
964 if (HCS_PPC (ehci->hcs_params))
965 ehci_writel(ehci, temp & ~PORT_POWER,
968 case USB_PORT_FEAT_C_CONNECTION:
969 ehci_writel(ehci, temp | PORT_CSC, status_reg);
971 case USB_PORT_FEAT_C_OVER_CURRENT:
972 ehci_writel(ehci, temp | PORT_OCC, status_reg);
974 case USB_PORT_FEAT_C_RESET:
975 /* GetPortStatus clears reset */
980 ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
982 case GetHubDescriptor:
983 ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
987 /* no hub-wide feature/status flags */
989 //cpu_to_le32s ((u32 *) buf);
992 if (!wIndex || wIndex > ports)
996 temp = ehci_readl(ehci, status_reg);
1000 status |= USB_PORT_STAT_C_CONNECTION << 16;
1001 if (temp & PORT_PEC)
1002 status |= USB_PORT_STAT_C_ENABLE << 16;
1004 if ((temp & PORT_OCC) && !ignore_oc){
1005 status |= USB_PORT_STAT_C_OVERCURRENT << 16;
1008 * Hubs should disable port power on over-current.
1009 * However, not all EHCI implementations do this
1010 * automatically, even if they _do_ support per-port
1011 * power switching; they're allowed to just limit the
1012 * current. khubd will turn the power back on.
1014 if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
1015 && HCS_PPC(ehci->hcs_params)) {
1017 temp & ~(PORT_RWC_BITS | PORT_POWER),
1019 temp = ehci_readl(ehci, status_reg);
1023 /* no reset or resume pending */
1024 if (!ehci->reset_done[wIndex]) {
1026 /* Remote Wakeup received? */
1027 if (temp & PORT_RESUME) {
1028 /* resume signaling for 20 msec */
1029 ehci->reset_done[wIndex] = jiffies
1030 + msecs_to_jiffies(20);
1031 usb_hcd_start_port_resume(&hcd->self, wIndex);
1032 set_bit(wIndex, &ehci->resuming_ports);
1033 /* check the port again */
1034 mod_timer(&ehci_to_hcd(ehci)->rh_timer,
1035 ehci->reset_done[wIndex]);
1038 /* reset or resume not yet complete */
1039 } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
1040 ; /* wait until it is complete */
1042 /* resume completed */
1043 } else if (test_bit(wIndex, &ehci->resuming_ports)) {
1044 clear_bit(wIndex, &ehci->suspended_ports);
1045 set_bit(wIndex, &ehci->port_c_suspend);
1046 ehci->reset_done[wIndex] = 0;
1047 usb_hcd_end_port_resume(&hcd->self, wIndex);
1049 /* stop resume signaling */
1050 temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
1051 ehci_writel(ehci, temp, status_reg);
1052 clear_bit(wIndex, &ehci->resuming_ports);
1053 retval = ehci_handshake(ehci, status_reg,
1054 PORT_RESUME, 0, 2000 /* 2msec */);
1056 ehci_err(ehci, "port %d resume error %d\n",
1057 wIndex + 1, retval);
1060 temp = ehci_readl(ehci, status_reg);
1062 /* whoever resets must GetPortStatus to complete it!! */
1064 status |= USB_PORT_STAT_C_RESET << 16;
1065 ehci->reset_done [wIndex] = 0;
1067 /* force reset to complete */
1068 ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
1070 /* REVISIT: some hardware needs 550+ usec to clear
1071 * this bit; seems too long to spin routinely...
1073 retval = ehci_handshake(ehci, status_reg,
1074 PORT_RESET, 0, 1000);
1076 ehci_err (ehci, "port %d reset error %d\n",
1077 wIndex + 1, retval);
1081 /* see what we found out */
1082 temp = check_reset_complete (ehci, wIndex, status_reg,
1083 ehci_readl(ehci, status_reg));
1086 /* transfer dedicated ports to the companion hc */
1087 if ((temp & PORT_CONNECT) &&
1088 test_bit(wIndex, &ehci->companion_ports)) {
1089 temp &= ~PORT_RWC_BITS;
1091 ehci_writel(ehci, temp, status_reg);
1092 ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
1093 temp = ehci_readl(ehci, status_reg);
1097 * Even if OWNER is set, there's no harm letting khubd
1098 * see the wPortStatus values (they should all be 0 except
1099 * for PORT_POWER anyway).
1102 if (temp & PORT_CONNECT) {
1103 status |= USB_PORT_STAT_CONNECTION;
1104 // status may be from integrated TT
1105 if (ehci->has_hostpc) {
1106 temp1 = ehci_readl(ehci, hostpc_reg);
1107 status |= ehci_port_speed(ehci, temp1);
1109 status |= ehci_port_speed(ehci, temp);
1112 status |= USB_PORT_STAT_ENABLE;
1114 /* maybe the port was unsuspended without our knowledge */
1115 if (temp & (PORT_SUSPEND|PORT_RESUME)) {
1116 status |= USB_PORT_STAT_SUSPEND;
1117 } else if (test_bit(wIndex, &ehci->suspended_ports)) {
1118 clear_bit(wIndex, &ehci->suspended_ports);
1119 clear_bit(wIndex, &ehci->resuming_ports);
1120 ehci->reset_done[wIndex] = 0;
1122 set_bit(wIndex, &ehci->port_c_suspend);
1123 usb_hcd_end_port_resume(&hcd->self, wIndex);
1127 status |= USB_PORT_STAT_OVERCURRENT;
1128 if (temp & PORT_RESET)
1129 status |= USB_PORT_STAT_RESET;
1130 if (temp & PORT_POWER)
1131 status |= USB_PORT_STAT_POWER;
1132 if (test_bit(wIndex, &ehci->port_c_suspend))
1133 status |= USB_PORT_STAT_C_SUSPEND << 16;
1135 if (status & ~0xffff) /* only if wPortChange is interesting */
1136 dbg_port(ehci, "GetStatus", wIndex + 1, temp);
1137 put_unaligned_le32(status, buf);
1141 case C_HUB_LOCAL_POWER:
1142 case C_HUB_OVER_CURRENT:
1143 /* no hub-wide feature/status flags */
1149 case SetPortFeature:
1150 selector = wIndex >> 8;
1152 if (unlikely(ehci->debug)) {
1153 /* If the debug port is active any port
1154 * feature requests should get denied */
1155 if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
1156 (readl(&ehci->debug->control) & DBGP_ENABLED)) {
1161 if (!wIndex || wIndex > ports)
1164 temp = ehci_readl(ehci, status_reg);
1165 if (temp & PORT_OWNER)
1168 temp &= ~PORT_RWC_BITS;
1170 case USB_PORT_FEAT_SUSPEND:
1171 if (ehci->no_selective_suspend)
1173 if ((temp & PORT_PE) == 0
1174 || (temp & PORT_RESET) != 0)
1177 /* After above check the port must be connected.
1178 * Set appropriate bit thus could put phy into low power
1179 * mode if we have tdi_phy_lpm feature
1181 temp &= ~PORT_WKCONN_E;
1182 temp |= PORT_WKDISC_E | PORT_WKOC_E;
1183 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
1184 if (ehci->has_tdi_phy_lpm) {
1185 spin_unlock_irqrestore(&ehci->lock, flags);
1186 msleep(5);/* 5ms for HCD enter low pwr mode */
1187 spin_lock_irqsave(&ehci->lock, flags);
1188 temp1 = ehci_readl(ehci, hostpc_reg);
1189 ehci_writel(ehci, temp1 | HOSTPC_PHCD,
1191 temp1 = ehci_readl(ehci, hostpc_reg);
1192 ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
1193 wIndex, (temp1 & HOSTPC_PHCD) ?
1194 "succeeded" : "failed");
1196 set_bit(wIndex, &ehci->suspended_ports);
1198 case USB_PORT_FEAT_POWER:
1199 if (HCS_PPC (ehci->hcs_params))
1200 ehci_writel(ehci, temp | PORT_POWER,
1203 case USB_PORT_FEAT_RESET:
1204 if (temp & (PORT_SUSPEND|PORT_RESUME))
1206 /* line status bits may report this as low speed,
1207 * which can be fine if this root hub has a
1208 * transaction translator built in.
1210 if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
1211 && !ehci_is_TDI(ehci)
1212 && PORT_USB11 (temp)) {
1214 "port %d low speed --> companion\n",
1222 * caller must wait, then call GetPortStatus
1223 * usb 2.0 spec says 50 ms resets on root
1225 ehci->reset_done [wIndex] = jiffies
1226 + msecs_to_jiffies (50);
1228 ehci_writel(ehci, temp, status_reg);
1231 /* For downstream facing ports (these): one hub port is put
1232 * into test mode according to USB2 11.24.2.13, then the hub
1233 * must be reset (which for root hub now means rmmod+modprobe,
1234 * or else system reboot). See EHCI 2.3.9 and 4.14 for info
1235 * about the EHCI-specific stuff.
1237 case USB_PORT_FEAT_TEST:
1238 #ifdef CONFIG_USB_HCD_TEST_MODE
1239 if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) {
1240 spin_unlock_irqrestore(&ehci->lock, flags);
1241 retval = ehset_single_step_set_feature(hcd,
1243 spin_lock_irqsave(&ehci->lock, flags);
1247 if (!selector || selector > 5)
1249 spin_unlock_irqrestore(&ehci->lock, flags);
1251 spin_lock_irqsave(&ehci->lock, flags);
1253 /* Put all enabled ports into suspend */
1256 &ehci->regs->port_status[ports];
1258 temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
1260 ehci_writel(ehci, temp | PORT_SUSPEND,
1264 spin_unlock_irqrestore(&ehci->lock, flags);
1266 spin_lock_irqsave(&ehci->lock, flags);
1268 temp = ehci_readl(ehci, status_reg);
1269 temp |= selector << 16;
1270 ehci_writel(ehci, temp, status_reg);
1276 ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
1281 /* "stall" on error */
1285 spin_unlock_irqrestore (&ehci->lock, flags);
1289 static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
1291 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1293 if (ehci_is_TDI(ehci))
1295 set_owner(ehci, --portnum, PORT_OWNER);
1298 static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
1300 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
1303 if (ehci_is_TDI(ehci))
1305 reg = &ehci->regs->port_status[portnum - 1];
1306 return ehci_readl(ehci, reg) & PORT_OWNER;