// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2001-2004 by David Brownell */ /* this file is part of ehci-hcd.c */ /*-------------------------------------------------------------------------*/ /* * EHCI Root Hub ... the nonsharable stuff * * Registers don't need cpu_to_le32, that happens transparently */ /*-------------------------------------------------------------------------*/ #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) #ifdef CONFIG_PM static void unlink_empty_async_suspended(struct ehci_hcd *ehci); static int persist_enabled_on_companion(struct usb_device *udev, void *unused) { return !udev->maxchild && udev->persist_enabled && udev->bus->root_hub->speed < USB_SPEED_HIGH; } /* After a power loss, ports that were owned by the companion must be * reset so that the companion can still own them. */ static void ehci_handover_companion_ports(struct ehci_hcd *ehci) { u32 __iomem *reg; u32 status; int port; __le32 buf; struct usb_hcd *hcd = ehci_to_hcd(ehci); if (!ehci->owned_ports) return; /* * USB 1.1 devices are mostly HIDs, which don't need to persist across * suspends. If we ensure that none of our companion's devices have * persist_enabled (by looking through all USB 1.1 buses in the system), * we can skip this and avoid slowing resume down. Devices without * persist will just get reenumerated shortly after resume anyway. */ if (!usb_for_each_dev(NULL, persist_enabled_on_companion)) return; /* Make sure the ports are powered */ port = HCS_N_PORTS(ehci->hcs_params); while (port--) { if (test_bit(port, &ehci->owned_ports)) { reg = &ehci->regs->port_status[port]; status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; if (!(status & PORT_POWER)) ehci_port_power(ehci, port, true); } } /* Give the connections some time to appear */ msleep(20); spin_lock_irq(&ehci->lock); port = HCS_N_PORTS(ehci->hcs_params); while (port--) { if (test_bit(port, &ehci->owned_ports)) { reg = &ehci->regs->port_status[port]; status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; /* Port already owned by companion? */ if (status & PORT_OWNER) clear_bit(port, &ehci->owned_ports); else if (test_bit(port, &ehci->companion_ports)) ehci_writel(ehci, status & ~PORT_PE, reg); else { spin_unlock_irq(&ehci->lock); ehci_hub_control(hcd, SetPortFeature, USB_PORT_FEAT_RESET, port + 1, NULL, 0); spin_lock_irq(&ehci->lock); } } } spin_unlock_irq(&ehci->lock); if (!ehci->owned_ports) return; msleep(90); /* Wait for resets to complete */ spin_lock_irq(&ehci->lock); port = HCS_N_PORTS(ehci->hcs_params); while (port--) { if (test_bit(port, &ehci->owned_ports)) { spin_unlock_irq(&ehci->lock); ehci_hub_control(hcd, GetPortStatus, 0, port + 1, (char *) &buf, sizeof(buf)); spin_lock_irq(&ehci->lock); /* The companion should now own the port, * but if something went wrong the port must not * remain enabled. */ reg = &ehci->regs->port_status[port]; status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; if (status & PORT_OWNER) ehci_writel(ehci, status | PORT_CSC, reg); else { ehci_dbg(ehci, "failed handover port %d: %x\n", port + 1, status); ehci_writel(ehci, status & ~PORT_PE, reg); } } } ehci->owned_ports = 0; spin_unlock_irq(&ehci->lock); } static int ehci_port_change(struct ehci_hcd *ehci) { int i = HCS_N_PORTS(ehci->hcs_params); /* First check if the controller indicates a change event */ if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD) return 1; /* * Not all controllers appear to update this while going from D3 to D0, * so check the individual port status registers as well */ while (i--) if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC) return 1; return 0; } void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, bool suspending, bool do_wakeup) { int port; u32 temp; /* If remote wakeup is enabled for the root hub but disabled * for the controller, we must adjust all the port wakeup flags * when the controller is suspended or resumed. In all other * cases they don't need to be changed. */ if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup) return; spin_lock_irq(&ehci->lock); /* clear phy low-power mode before changing wakeup flags */ if (ehci->has_tdi_phy_lpm) { port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; temp = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); } spin_unlock_irq(&ehci->lock); msleep(5); spin_lock_irq(&ehci->lock); } port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *reg = &ehci->regs->port_status[port]; u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; u32 t2 = t1 & ~PORT_WAKE_BITS; /* If we are suspending the controller, clear the flags. * If we are resuming the controller, set the wakeup flags. */ if (!suspending) { if (t1 & PORT_CONNECT) t2 |= PORT_WKOC_E | PORT_WKDISC_E; else t2 |= PORT_WKOC_E | PORT_WKCONN_E; } ehci_writel(ehci, t2, reg); } /* enter phy low-power mode again */ if (ehci->has_tdi_phy_lpm) { port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; temp = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg); } } /* Does the root hub have a port wakeup pending? */ if (!suspending && ehci_port_change(ehci)) usb_hcd_resume_root_hub(ehci_to_hcd(ehci)); spin_unlock_irq(&ehci->lock); } EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags); static int ehci_bus_suspend (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int port; int mask; int changed; bool fs_idle_delay; ehci_dbg(ehci, "suspend root hub\n"); if (time_before (jiffies, ehci->next_statechange)) msleep(5); /* stop the schedules */ ehci_quiesce(ehci); spin_lock_irq (&ehci->lock); if (ehci->rh_state < EHCI_RH_RUNNING) goto done; /* Once the controller is stopped, port resumes that are already * in progress won't complete. Hence if remote wakeup is enabled * for the root hub and any ports are in the middle of a resume or * remote wakeup, we must fail the suspend. */ if (hcd->self.root_hub->do_remote_wakeup) { if (ehci->resuming_ports) { spin_unlock_irq(&ehci->lock); ehci_dbg(ehci, "suspend failed because a port is resuming\n"); return -EBUSY; } } /* Unlike other USB host controller types, EHCI doesn't have * any notion of "global" or bus-wide suspend. The driver has * to manually suspend all the active unsuspended ports, and * then manually resume them in the bus_resume() routine. */ ehci->bus_suspended = 0; ehci->owned_ports = 0; changed = 0; fs_idle_delay = false; port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *reg = &ehci->regs->port_status [port]; u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS; u32 t2 = t1 & ~PORT_WAKE_BITS; /* keep track of which ports we suspend */ if (t1 & PORT_OWNER) set_bit(port, &ehci->owned_ports); else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) { t2 |= PORT_SUSPEND; set_bit(port, &ehci->bus_suspended); } /* enable remote wakeup on all ports, if told to do so */ if (hcd->self.root_hub->do_remote_wakeup) { /* only enable appropriate wake bits, otherwise the * hardware can not go phy low power mode. If a race * condition happens here(connection change during bits * set), the port change detection will finally fix it. */ if (t1 & PORT_CONNECT) t2 |= PORT_WKOC_E | PORT_WKDISC_E; else t2 |= PORT_WKOC_E | PORT_WKCONN_E; } if (t1 != t2) { /* * On some controllers, Wake-On-Disconnect will * generate false wakeup signals until the bus * switches over to full-speed idle. For their * sake, add a delay if we need one. */ if ((t2 & PORT_WKDISC_E) && ehci_port_speed(ehci, t2) == USB_PORT_STAT_HIGH_SPEED) fs_idle_delay = true; ehci_writel(ehci, t2, reg); changed = 1; } } spin_unlock_irq(&ehci->lock); if (changed && ehci_has_fsl_susp_errata(ehci)) /* * Wait for at least 10 millisecondes to ensure the controller * enter the suspend status before initiating a port resume * using the Force Port Resume bit (Not-EHCI compatible). */ usleep_range(10000, 20000); if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) { /* * Wait for HCD to enter low-power mode or for the bus * to switch to full-speed idle. */ usleep_range(5000, 5500); } if (changed && ehci->has_tdi_phy_lpm) { spin_lock_irq(&ehci->lock); port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port]; u32 t3; t3 = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg); t3 = ehci_readl(ehci, hostpc_reg); ehci_dbg(ehci, "Port %d phy low-power mode %s\n", port, (t3 & HOSTPC_PHCD) ? "succeeded" : "failed"); } spin_unlock_irq(&ehci->lock); } /* Apparently some devices need a >= 1-uframe delay here */ if (ehci->bus_suspended) udelay(150); /* turn off now-idle HC */ ehci_halt (ehci); spin_lock_irq(&ehci->lock); if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD)) ehci_handle_controller_death(ehci); if (ehci->rh_state != EHCI_RH_RUNNING) goto done; ehci->rh_state = EHCI_RH_SUSPENDED; unlink_empty_async_suspended(ehci); /* Some Synopsys controllers mistakenly leave IAA turned on */ ehci_writel(ehci, STS_IAA, &ehci->regs->status); /* Any IAA cycle that started before the suspend is now invalid */ end_iaa_cycle(ehci); ehci_handle_start_intr_unlinks(ehci); ehci_handle_intr_unlinks(ehci); end_free_itds(ehci); /* allow remote wakeup */ mask = INTR_MASK; if (!hcd->self.root_hub->do_remote_wakeup) mask &= ~STS_PCD; ehci_writel(ehci, mask, &ehci->regs->intr_enable); ehci_readl(ehci, &ehci->regs->intr_enable); done: ehci->next_statechange = jiffies + msecs_to_jiffies(10); ehci->enabled_hrtimer_events = 0; ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT; spin_unlock_irq (&ehci->lock); hrtimer_cancel(&ehci->hrtimer); return 0; } /* caller has locked the root hub, and should reset/reinit on error */ static int ehci_bus_resume (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); u32 temp; u32 power_okay; int i; unsigned long resume_needed = 0; if (time_before (jiffies, ehci->next_statechange)) msleep(5); spin_lock_irq (&ehci->lock); if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown) goto shutdown; if (unlikely(ehci->debug)) { if (!dbgp_reset_prep(hcd)) ehci->debug = NULL; else dbgp_external_startup(hcd); } /* Ideally and we've got a real resume here, and no port's power * was lost. (For PCI, that means Vaux was maintained.) But we * could instead be restoring a swsusp snapshot -- so that BIOS was * the last user of the controller, not reset/pm hardware keeping * state we gave to it. */ power_okay = ehci_readl(ehci, &ehci->regs->intr_enable); ehci_dbg(ehci, "resume root hub%s\n", power_okay ? "" : " after power loss"); /* at least some APM implementations will try to deliver * IRQs right away, so delay them until we're ready. */ ehci_writel(ehci, 0, &ehci->regs->intr_enable); /* re-init operational registers */ ehci_writel(ehci, 0, &ehci->regs->segment); ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list); ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next); /* restore CMD_RUN, framelist size, and irq threshold */ ehci->command |= CMD_RUN; ehci_writel(ehci, ehci->command, &ehci->regs->command); ehci->rh_state = EHCI_RH_RUNNING; /* * According to Bugzilla #8190, the port status for some controllers * will be wrong without a delay. At their wrong status, the port * is enabled, but not suspended neither resumed. */ i = HCS_N_PORTS(ehci->hcs_params); while (i--) { temp = ehci_readl(ehci, &ehci->regs->port_status[i]); if ((temp & PORT_PE) && !(temp & (PORT_SUSPEND | PORT_RESUME))) { ehci_dbg(ehci, "Port status(0x%x) is wrong\n", temp); spin_unlock_irq(&ehci->lock); msleep(8); spin_lock_irq(&ehci->lock); break; } } if (ehci->shutdown) goto shutdown; /* clear phy low-power mode before resume */ if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) { i = HCS_N_PORTS(ehci->hcs_params); while (i--) { if (test_bit(i, &ehci->bus_suspended)) { u32 __iomem *hostpc_reg = &ehci->regs->hostpc[i]; temp = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); } } spin_unlock_irq(&ehci->lock); msleep(5); spin_lock_irq(&ehci->lock); if (ehci->shutdown) goto shutdown; } /* manually resume the ports we suspended during bus_suspend() */ i = HCS_N_PORTS (ehci->hcs_params); while (i--) { temp = ehci_readl(ehci, &ehci->regs->port_status [i]); temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); if (test_bit(i, &ehci->bus_suspended) && (temp & PORT_SUSPEND)) { temp |= PORT_RESUME; set_bit(i, &resume_needed); } ehci_writel(ehci, temp, &ehci->regs->port_status [i]); } /* * msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume * port */ if (resume_needed) { spin_unlock_irq(&ehci->lock); msleep(USB_RESUME_TIMEOUT); spin_lock_irq(&ehci->lock); if (ehci->shutdown) goto shutdown; } i = HCS_N_PORTS (ehci->hcs_params); while (i--) { temp = ehci_readl(ehci, &ehci->regs->port_status [i]); if (test_bit(i, &resume_needed)) { temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); ehci_writel(ehci, temp, &ehci->regs->port_status [i]); } } ehci->next_statechange = jiffies + msecs_to_jiffies(5); spin_unlock_irq(&ehci->lock); ehci_handover_companion_ports(ehci); /* Now we can safely re-enable irqs */ spin_lock_irq(&ehci->lock); if (ehci->shutdown) goto shutdown; ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); (void) ehci_readl(ehci, &ehci->regs->intr_enable); spin_unlock_irq(&ehci->lock); return 0; shutdown: spin_unlock_irq(&ehci->lock); return -ESHUTDOWN; } static unsigned long ehci_get_resuming_ports(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); return ehci->resuming_ports; } #else #define ehci_bus_suspend NULL #define ehci_bus_resume NULL #define ehci_get_resuming_ports NULL #endif /* CONFIG_PM */ /*-------------------------------------------------------------------------*/ /* * Sets the owner of a port */ static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner) { u32 __iomem *status_reg; u32 port_status; int try; status_reg = &ehci->regs->port_status[portnum]; /* * The controller won't set the OWNER bit if the port is * enabled, so this loop will sometimes require at least two * iterations: one to disable the port and one to set OWNER. */ for (try = 4; try > 0; --try) { spin_lock_irq(&ehci->lock); port_status = ehci_readl(ehci, status_reg); if ((port_status & PORT_OWNER) == new_owner || (port_status & (PORT_OWNER | PORT_CONNECT)) == 0) try = 0; else { port_status ^= PORT_OWNER; port_status &= ~(PORT_PE | PORT_RWC_BITS); ehci_writel(ehci, port_status, status_reg); } spin_unlock_irq(&ehci->lock); if (try > 1) msleep(5); } } /*-------------------------------------------------------------------------*/ static int check_reset_complete ( struct ehci_hcd *ehci, int index, u32 __iomem *status_reg, int port_status ) { if (!(port_status & PORT_CONNECT)) return port_status; /* if reset finished and it's still not enabled -- handoff */ if (!(port_status & PORT_PE)) { /* with integrated TT, there's nobody to hand it to! */ if (ehci_is_TDI(ehci)) { ehci_dbg (ehci, "Failed to enable port %d on root hub TT\n", index+1); return port_status; } ehci_dbg (ehci, "port %d full speed --> companion\n", index + 1); // what happens if HCS_N_CC(params) == 0 ? port_status |= PORT_OWNER; port_status &= ~PORT_RWC_BITS; ehci_writel(ehci, port_status, status_reg); /* ensure 440EPX ohci controller state is operational */ if (ehci->has_amcc_usb23) set_ohci_hcfs(ehci, 1); } else { ehci_dbg(ehci, "port %d reset complete, port enabled\n", index + 1); /* ensure 440EPx ohci controller state is suspended */ if (ehci->has_amcc_usb23) set_ohci_hcfs(ehci, 0); } return port_status; } /*-------------------------------------------------------------------------*/ /* build "status change" packet (one or two bytes) from HC registers */ static int ehci_hub_status_data (struct usb_hcd *hcd, char *buf) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); u32 temp, status; u32 mask; int ports, i, retval = 1; unsigned long flags; u32 ppcd = ~0; /* init status to no-changes */ buf [0] = 0; ports = HCS_N_PORTS (ehci->hcs_params); if (ports > 7) { buf [1] = 0; retval++; } /* Inform the core about resumes-in-progress by returning * a non-zero value even if there are no status changes. */ status = ehci->resuming_ports; /* Some boards (mostly VIA?) report bogus overcurrent indications, * causing massive log spam unless we completely ignore them. It * may be relevant that VIA VT8235 controllers, where PORT_POWER is * always set, seem to clear PORT_OCC and PORT_CSC when writing to * PORT_POWER; that's surprising, but maybe within-spec. */ if (!ignore_oc && !ehci->spurious_oc) mask = PORT_CSC | PORT_PEC | PORT_OCC; else mask = PORT_CSC | PORT_PEC; // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND /* no hub change reports (bit 0) for now (power, ...) */ /* port N changes (bit N)? */ spin_lock_irqsave (&ehci->lock, flags); /* get per-port change detect bits */ if (ehci->has_ppcd) ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16; for (i = 0; i < ports; i++) { /* leverage per-port change bits feature */ if (ppcd & (1 << i)) temp = ehci_readl(ehci, &ehci->regs->port_status[i]); else temp = 0; /* * Return status information even for ports with OWNER set. * Otherwise hub_wq wouldn't see the disconnect event when a * high-speed device is switched over to the companion * controller by the user. */ if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend) || (ehci->reset_done[i] && time_after_eq( jiffies, ehci->reset_done[i]))) { if (i < 7) buf [0] |= 1 << (i + 1); else buf [1] |= 1 << (i - 7); status = STS_PCD; } } /* If a resume is in progress, make sure it can finish */ if (ehci->resuming_ports) mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25)); spin_unlock_irqrestore (&ehci->lock, flags); return status ? retval : 0; } /*-------------------------------------------------------------------------*/ static void ehci_hub_descriptor ( struct ehci_hcd *ehci, struct usb_hub_descriptor *desc ) { int ports = HCS_N_PORTS (ehci->hcs_params); u16 temp; desc->bDescriptorType = USB_DT_HUB; desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */ desc->bHubContrCurrent = 0; desc->bNbrPorts = ports; temp = 1 + (ports / 8); desc->bDescLength = 7 + 2 * temp; /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ memset(&desc->u.hs.DeviceRemovable[0], 0, temp); memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp); temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */ if (HCS_PPC (ehci->hcs_params)) temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */ else temp |= HUB_CHAR_NO_LPSM; /* no power switching */ #if 0 // re-enable when we support USB_PORT_FEAT_INDICATOR below. if (HCS_INDICATOR (ehci->hcs_params)) temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */ #endif desc->wHubCharacteristics = cpu_to_le16(temp); } /*-------------------------------------------------------------------------*/ int ehci_hub_control( struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength ) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int ports = HCS_N_PORTS (ehci->hcs_params); u32 __iomem *status_reg, *hostpc_reg; u32 temp, temp1, status; unsigned long flags; int retval = 0; unsigned selector; /* * Avoid out-of-bounds values while calculating the port index * from wIndex. The compiler doesn't like pointers to invalid * addresses, even if they are never used. */ temp = (wIndex - 1) & 0xff; if (temp >= HCS_N_PORTS_MAX) temp = 0; status_reg = &ehci->regs->port_status[temp]; hostpc_reg = &ehci->regs->hostpc[temp]; /* * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. * HCS_INDICATOR may say we can change LEDs to off/amber/green. * (track current state ourselves) ... blink for diagnostics, * power, "this is the one", etc. EHCI spec supports this. */ spin_lock_irqsave (&ehci->lock, flags); switch (typeReq) { case ClearHubFeature: switch (wValue) { case C_HUB_LOCAL_POWER: case C_HUB_OVER_CURRENT: /* no hub-wide feature/status flags */ break; default: goto error; } break; case ClearPortFeature: if (!wIndex || wIndex > ports) goto error; wIndex--; temp = ehci_readl(ehci, status_reg); temp &= ~PORT_RWC_BITS; /* * Even if OWNER is set, so the port is owned by the * companion controller, hub_wq needs to be able to clear * the port-change status bits (especially * USB_PORT_STAT_C_CONNECTION). */ switch (wValue) { case USB_PORT_FEAT_ENABLE: ehci_writel(ehci, temp & ~PORT_PE, status_reg); break; case USB_PORT_FEAT_C_ENABLE: ehci_writel(ehci, temp | PORT_PEC, status_reg); break; case USB_PORT_FEAT_SUSPEND: if (temp & PORT_RESET) goto error; if (ehci->no_selective_suspend) break; #ifdef CONFIG_USB_OTG if ((hcd->self.otg_port == (wIndex + 1)) && hcd->self.b_hnp_enable) { otg_start_hnp(hcd->usb_phy->otg); break; } #endif if (!(temp & PORT_SUSPEND)) break; if ((temp & PORT_PE) == 0) goto error; /* clear phy low-power mode before resume */ if (ehci->has_tdi_phy_lpm) { temp1 = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp1 & ~HOSTPC_PHCD, hostpc_reg); spin_unlock_irqrestore(&ehci->lock, flags); msleep(5);/* wait to leave low-power mode */ spin_lock_irqsave(&ehci->lock, flags); } /* resume signaling for 20 msec */ temp &= ~PORT_WAKE_BITS; ehci_writel(ehci, temp | PORT_RESUME, status_reg); ehci->reset_done[wIndex] = jiffies + msecs_to_jiffies(USB_RESUME_TIMEOUT); set_bit(wIndex, &ehci->resuming_ports); usb_hcd_start_port_resume(&hcd->self, wIndex); break; case USB_PORT_FEAT_C_SUSPEND: clear_bit(wIndex, &ehci->port_c_suspend); break; case USB_PORT_FEAT_POWER: if (HCS_PPC(ehci->hcs_params)) { spin_unlock_irqrestore(&ehci->lock, flags); ehci_port_power(ehci, wIndex, false); spin_lock_irqsave(&ehci->lock, flags); } break; case USB_PORT_FEAT_C_CONNECTION: ehci_writel(ehci, temp | PORT_CSC, status_reg); break; case USB_PORT_FEAT_C_OVER_CURRENT: ehci_writel(ehci, temp | PORT_OCC, status_reg); break; case USB_PORT_FEAT_C_RESET: /* GetPortStatus clears reset */ break; default: goto error; } ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */ break; case GetHubDescriptor: ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *) buf); break; case GetHubStatus: /* no hub-wide feature/status flags */ memset (buf, 0, 4); //cpu_to_le32s ((u32 *) buf); break; case GetPortStatus: if (!wIndex || wIndex > ports) goto error; wIndex--; status = 0; temp = ehci_readl(ehci, status_reg); // wPortChange bits if (temp & PORT_CSC) status |= USB_PORT_STAT_C_CONNECTION << 16; if (temp & PORT_PEC) status |= USB_PORT_STAT_C_ENABLE << 16; if ((temp & PORT_OCC) && (!ignore_oc && !ehci->spurious_oc)){ status |= USB_PORT_STAT_C_OVERCURRENT << 16; /* * Hubs should disable port power on over-current. * However, not all EHCI implementations do this * automatically, even if they _do_ support per-port * power switching; they're allowed to just limit the * current. hub_wq will turn the power back on. */ if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle)) && HCS_PPC(ehci->hcs_params)) { spin_unlock_irqrestore(&ehci->lock, flags); ehci_port_power(ehci, wIndex, false); spin_lock_irqsave(&ehci->lock, flags); temp = ehci_readl(ehci, status_reg); } } /* no reset or resume pending */ if (!ehci->reset_done[wIndex]) { /* Remote Wakeup received? */ if (temp & PORT_RESUME) { /* resume signaling for 20 msec */ ehci->reset_done[wIndex] = jiffies + msecs_to_jiffies(20); usb_hcd_start_port_resume(&hcd->self, wIndex); set_bit(wIndex, &ehci->resuming_ports); /* check the port again */ mod_timer(&ehci_to_hcd(ehci)->rh_timer, ehci->reset_done[wIndex]); } /* reset or resume not yet complete */ } else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) { ; /* wait until it is complete */ /* resume completed */ } else if (test_bit(wIndex, &ehci->resuming_ports)) { clear_bit(wIndex, &ehci->suspended_ports); set_bit(wIndex, &ehci->port_c_suspend); ehci->reset_done[wIndex] = 0; usb_hcd_end_port_resume(&hcd->self, wIndex); /* stop resume signaling */ temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME); ehci_writel(ehci, temp, status_reg); clear_bit(wIndex, &ehci->resuming_ports); retval = ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 2000 /* 2msec */); if (retval != 0) { ehci_err(ehci, "port %d resume error %d\n", wIndex + 1, retval); goto error; } temp = ehci_readl(ehci, status_reg); /* whoever resets must GetPortStatus to complete it!! */ } else { status |= USB_PORT_STAT_C_RESET << 16; ehci->reset_done [wIndex] = 0; /* force reset to complete */ ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), status_reg); /* REVISIT: some hardware needs 550+ usec to clear * this bit; seems too long to spin routinely... */ retval = ehci_handshake(ehci, status_reg, PORT_RESET, 0, 1000); if (retval != 0) { ehci_err (ehci, "port %d reset error %d\n", wIndex + 1, retval); goto error; } /* see what we found out */ temp = check_reset_complete (ehci, wIndex, status_reg, ehci_readl(ehci, status_reg)); } /* transfer dedicated ports to the companion hc */ if ((temp & PORT_CONNECT) && test_bit(wIndex, &ehci->companion_ports)) { temp &= ~PORT_RWC_BITS; temp |= PORT_OWNER; ehci_writel(ehci, temp, status_reg); ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1); temp = ehci_readl(ehci, status_reg); } /* * Even if OWNER is set, there's no harm letting hub_wq * see the wPortStatus values (they should all be 0 except * for PORT_POWER anyway). */ if (temp & PORT_CONNECT) { status |= USB_PORT_STAT_CONNECTION; // status may be from integrated TT if (ehci->has_hostpc) { temp1 = ehci_readl(ehci, hostpc_reg); status |= ehci_port_speed(ehci, temp1); } else status |= ehci_port_speed(ehci, temp); } if (temp & PORT_PE) status |= USB_PORT_STAT_ENABLE; /* maybe the port was unsuspended without our knowledge */ if (temp & (PORT_SUSPEND|PORT_RESUME)) { status |= USB_PORT_STAT_SUSPEND; } else if (test_bit(wIndex, &ehci->suspended_ports)) { clear_bit(wIndex, &ehci->suspended_ports); clear_bit(wIndex, &ehci->resuming_ports); ehci->reset_done[wIndex] = 0; if (temp & PORT_PE) set_bit(wIndex, &ehci->port_c_suspend); usb_hcd_end_port_resume(&hcd->self, wIndex); } if (temp & PORT_OC) status |= USB_PORT_STAT_OVERCURRENT; if (temp & PORT_RESET) status |= USB_PORT_STAT_RESET; if (temp & PORT_POWER) status |= USB_PORT_STAT_POWER; if (test_bit(wIndex, &ehci->port_c_suspend)) status |= USB_PORT_STAT_C_SUSPEND << 16; if (status & ~0xffff) /* only if wPortChange is interesting */ dbg_port(ehci, "GetStatus", wIndex + 1, temp); put_unaligned_le32(status, buf); break; case SetHubFeature: switch (wValue) { case C_HUB_LOCAL_POWER: case C_HUB_OVER_CURRENT: /* no hub-wide feature/status flags */ break; default: goto error; } break; case SetPortFeature: selector = wIndex >> 8; wIndex &= 0xff; if (unlikely(ehci->debug)) { /* If the debug port is active any port * feature requests should get denied */ if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) && (readl(&ehci->debug->control) & DBGP_ENABLED)) { retval = -ENODEV; goto error_exit; } } if (!wIndex || wIndex > ports) goto error; wIndex--; temp = ehci_readl(ehci, status_reg); if (temp & PORT_OWNER) break; temp &= ~PORT_RWC_BITS; switch (wValue) { case USB_PORT_FEAT_SUSPEND: if (ehci->no_selective_suspend) break; if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) goto error; /* After above check the port must be connected. * Set appropriate bit thus could put phy into low power * mode if we have tdi_phy_lpm feature */ temp &= ~PORT_WKCONN_E; temp |= PORT_WKDISC_E | PORT_WKOC_E; ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); if (ehci->has_tdi_phy_lpm) { spin_unlock_irqrestore(&ehci->lock, flags); msleep(5);/* 5ms for HCD enter low pwr mode */ spin_lock_irqsave(&ehci->lock, flags); temp1 = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp1 | HOSTPC_PHCD, hostpc_reg); temp1 = ehci_readl(ehci, hostpc_reg); ehci_dbg(ehci, "Port%d phy low pwr mode %s\n", wIndex, (temp1 & HOSTPC_PHCD) ? "succeeded" : "failed"); } if (ehci_has_fsl_susp_errata(ehci)) { /* 10ms for HCD enter suspend */ spin_unlock_irqrestore(&ehci->lock, flags); usleep_range(10000, 20000); spin_lock_irqsave(&ehci->lock, flags); } set_bit(wIndex, &ehci->suspended_ports); break; case USB_PORT_FEAT_POWER: if (HCS_PPC(ehci->hcs_params)) { spin_unlock_irqrestore(&ehci->lock, flags); ehci_port_power(ehci, wIndex, true); spin_lock_irqsave(&ehci->lock, flags); } break; case USB_PORT_FEAT_RESET: if (temp & (PORT_SUSPEND|PORT_RESUME)) goto error; /* line status bits may report this as low speed, * which can be fine if this root hub has a * transaction translator built in. */ if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT && !ehci_is_TDI(ehci) && PORT_USB11 (temp)) { ehci_dbg (ehci, "port %d low speed --> companion\n", wIndex + 1); temp |= PORT_OWNER; } else { temp |= PORT_RESET; temp &= ~PORT_PE; /* * caller must wait, then call GetPortStatus * usb 2.0 spec says 50 ms resets on root */ ehci->reset_done [wIndex] = jiffies + msecs_to_jiffies (50); /* * Force full-speed connect for FSL high-speed * erratum; disable HS Chirp by setting PFSC bit */ if (ehci_has_fsl_hs_errata(ehci)) temp |= (1 << PORTSC_FSL_PFSC); } ehci_writel(ehci, temp, status_reg); break; /* For downstream facing ports (these): one hub port is put * into test mode according to USB2 11.24.2.13, then the hub * must be reset (which for root hub now means rmmod+modprobe, * or else system reboot). See EHCI 2.3.9 and 4.14 for info * about the EHCI-specific stuff. */ case USB_PORT_FEAT_TEST: #ifdef CONFIG_USB_HCD_TEST_MODE if (selector == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { spin_unlock_irqrestore(&ehci->lock, flags); retval = ehset_single_step_set_feature(hcd, wIndex + 1); spin_lock_irqsave(&ehci->lock, flags); break; } #endif if (!selector || selector > 5) goto error; spin_unlock_irqrestore(&ehci->lock, flags); ehci_quiesce(ehci); spin_lock_irqsave(&ehci->lock, flags); /* Put all enabled ports into suspend */ while (ports--) { u32 __iomem *sreg = &ehci->regs->port_status[ports]; temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS; if (temp & PORT_PE) ehci_writel(ehci, temp | PORT_SUSPEND, sreg); } spin_unlock_irqrestore(&ehci->lock, flags); ehci_halt(ehci); spin_lock_irqsave(&ehci->lock, flags); temp = ehci_readl(ehci, status_reg); temp |= selector << 16; ehci_writel(ehci, temp, status_reg); break; default: goto error; } ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ break; default: error: /* "stall" on error */ retval = -EPIPE; } error_exit: spin_unlock_irqrestore (&ehci->lock, flags); return retval; } EXPORT_SYMBOL_GPL(ehci_hub_control); static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); if (ehci_is_TDI(ehci)) return; set_owner(ehci, --portnum, PORT_OWNER); } static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); u32 __iomem *reg; if (ehci_is_TDI(ehci)) return 0; reg = &ehci->regs->port_status[portnum - 1]; return ehci_readl(ehci, reg) & PORT_OWNER; } static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable) { struct usb_hcd *hcd = ehci_to_hcd(ehci); u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; if (enable) ehci_writel(ehci, temp | PORT_POWER, status_reg); else ehci_writel(ehci, temp & ~PORT_POWER, status_reg); if (hcd->driver->port_power) hcd->driver->port_power(hcd, portnum, enable); return 0; }