/* * Copyright (C) 2001-2004 by David Brownell * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* this file is part of ehci-hcd.c */ /*-------------------------------------------------------------------------*/ /* * EHCI Root Hub ... the nonsharable stuff * * Registers don't need cpu_to_le32, that happens transparently */ /*-------------------------------------------------------------------------*/ #include #define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) #ifdef CONFIG_PM static int ehci_hub_control( struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength ); /* 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; /* Give the connections some time to appear */ msleep(20); 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 ehci_hub_control(hcd, SetPortFeature, USB_PORT_FEAT_RESET, port + 1, NULL, 0); } } if (!ehci->owned_ports) return; msleep(90); /* Wait for resets to complete */ port = HCS_N_PORTS(ehci->hcs_params); while (port--) { if (test_bit(port, &ehci->owned_ports)) { ehci_hub_control(hcd, GetPortStatus, 0, port + 1, (char *) &buf, sizeof(buf)); /* 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; } static int __maybe_unused 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; } static __maybe_unused void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci, bool suspending, bool do_wakeup) { int port; u32 temp; unsigned long flags; /* 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_irqsave(&ehci->lock, flags); /* clear phy low-power mode before changing wakeup flags */ if (ehci->has_hostpc) { port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg; hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + HOSTPC0 + 4 * port); temp = ehci_readl(ehci, hostpc_reg); ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg); } spin_unlock_irqrestore(&ehci->lock, flags); msleep(5); spin_lock_irqsave(&ehci->lock, flags); } 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_vdbg(ehci, "port %d, %08x -> %08x\n", port + 1, t1, t2); ehci_writel(ehci, t2, reg); } /* enter phy low-power mode again */ if (ehci->has_hostpc) { port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg; hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + HOSTPC0 + 4 * 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_irqrestore(&ehci->lock, flags); } static int ehci_bus_suspend (struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int port; int mask; int changed; ehci_dbg(ehci, "suspend root hub\n"); if (time_before (jiffies, ehci->next_statechange)) msleep(5); del_timer_sync(&ehci->watchdog); del_timer_sync(&ehci->iaa_watchdog); spin_lock_irq (&ehci->lock); /* 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) { port = HCS_N_PORTS(ehci->hcs_params); while (port--) { if (ehci->reset_done[port] != 0) { spin_unlock_irq(&ehci->lock); ehci_dbg(ehci, "suspend failed because " "port %d is resuming\n", port + 1); return -EBUSY; } } } /* stop schedules, clean any completed work */ if (ehci->rh_state == EHCI_RH_RUNNING) ehci_quiesce (ehci); ehci->command = ehci_readl(ehci, &ehci->regs->command); ehci_work(ehci); /* 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; 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) { ehci_vdbg (ehci, "port %d, %08x -> %08x\n", port + 1, t1, t2); ehci_writel(ehci, t2, reg); changed = 1; } } if (changed && ehci->has_hostpc) { spin_unlock_irq(&ehci->lock); msleep(5); /* 5 ms for HCD to enter low-power mode */ spin_lock_irq(&ehci->lock); port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *hostpc_reg; u32 t3; hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + HOSTPC0 + 4 * port); 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"); } } /* Apparently some devices need a >= 1-uframe delay here */ if (ehci->bus_suspended) udelay(150); /* turn off now-idle HC */ ehci_halt (ehci); ehci->rh_state = EHCI_RH_SUSPENDED; if (ehci->reclaim) end_unlink_async(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); ehci->next_statechange = jiffies + msecs_to_jiffies(10); spin_unlock_irq (&ehci->lock); /* ehci_work() may have re-enabled the watchdog timer, which we do not * want, and so we must delete any pending watchdog timer events. */ del_timer_sync(&ehci->watchdog); 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)) { spin_unlock_irq(&ehci->lock); return -ESHUTDOWN; } if (unlikely(ehci->debug)) { if (!dbgp_reset_prep()) ehci->debug = NULL; else dbgp_external_startup(); } /* 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_writel(ehci, ehci->command, &ehci->regs->command); ehci->rh_state = EHCI_RH_RUNNING; /* Some controller/firmware combinations need a delay during which * they set up the port statuses. See Bugzilla #8190. */ spin_unlock_irq(&ehci->lock); msleep(8); spin_lock_irq(&ehci->lock); /* clear phy low-power mode before resume */ if (ehci->bus_suspended && ehci->has_hostpc) { i = HCS_N_PORTS(ehci->hcs_params); while (i--) { if (test_bit(i, &ehci->bus_suspended)) { u32 __iomem *hostpc_reg; hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs + HOSTPC0 + 4 * 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); } /* 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 20ms only if code is trying to resume port */ if (resume_needed) { spin_unlock_irq(&ehci->lock); msleep(20); spin_lock_irq(&ehci->lock); } 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_RESUME); ehci_writel(ehci, temp, &ehci->regs->port_status [i]); ehci_vdbg (ehci, "resumed port %d\n", i + 1); } } (void) ehci_readl(ehci, &ehci->regs->command); /* maybe re-activate the schedule(s) */ temp = 0; if (ehci->async->qh_next.qh) temp |= CMD_ASE; if (ehci->periodic_sched) temp |= CMD_PSE; if (temp) { ehci->command |= temp; ehci_writel(ehci, ehci->command, &ehci->regs->command); } ehci->next_statechange = jiffies + msecs_to_jiffies(5); /* Now we can safely re-enable irqs */ ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable); spin_unlock_irq (&ehci->lock); ehci_handover_companion_ports(ehci); return 0; } #else #define ehci_bus_suspend NULL #define ehci_bus_resume 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 high speed\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 = 0; u32 mask; int ports, i, retval = 1; unsigned long flags; u32 ppcd = 0; /* if !USB_SUSPEND, root hub timers won't get shut down ... */ if (ehci->rh_state != EHCI_RH_RUNNING) return 0; /* init status to no-changes */ buf [0] = 0; ports = HCS_N_PORTS (ehci->hcs_params); if (ports > 7) { buf [1] = 0; retval++; } /* 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) 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 (ehci->has_ppcd && !(ppcd & (1 << i))) continue; temp = ehci_readl(ehci, &ehci->regs->port_status [i]); /* * Return status information even for ports with OWNER set. * Otherwise khubd 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; } } /* FIXME autosuspend idle root hubs */ 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 = 0x29; 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 = 0x0008; /* per-port overcurrent reporting */ if (HCS_PPC (ehci->hcs_params)) temp |= 0x0001; /* per-port power control */ else temp |= 0x0002; /* no power switching */ #if 0 // re-enable when we support USB_PORT_FEAT_INDICATOR below. if (HCS_INDICATOR (ehci->hcs_params)) temp |= 0x0080; /* per-port indicators (LEDs) */ #endif desc->wHubCharacteristics = cpu_to_le16(temp); } /*-------------------------------------------------------------------------*/ static 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 = &ehci->regs->port_status[ (wIndex & 0xff) - 1]; u32 __iomem *hostpc_reg = NULL; u32 temp, temp1, status; unsigned long flags; int retval = 0; unsigned selector; /* * 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. */ if (ehci->has_hostpc) hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs + HOSTPC0 + 4 * ((wIndex & 0xff) - 1)); 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); /* * Even if OWNER is set, so the port is owned by the * companion controller, khubd 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_RWC_BITS) | 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(ehci->transceiver->otg); break; } #endif if (!(temp & PORT_SUSPEND)) break; if ((temp & PORT_PE) == 0) goto error; /* clear phy low-power mode before resume */ if (hostpc_reg) { 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_RWC_BITS | PORT_WAKE_BITS); ehci_writel(ehci, temp | PORT_RESUME, status_reg); ehci->reset_done[wIndex] = jiffies + msecs_to_jiffies(20); 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)) ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_POWER), status_reg); break; case USB_PORT_FEAT_C_CONNECTION: if (ehci->has_lpm) { /* clear PORTSC bits on disconnect */ temp &= ~PORT_LPM; temp &= ~PORT_DEV_ADDR; } ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, status_reg); break; case USB_PORT_FEAT_C_OVER_CURRENT: ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | 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){ 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. khubd will turn the power back on. */ if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) { ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_POWER), status_reg); temp = ehci_readl(ehci, status_reg); } } /* whoever resumes must GetPortStatus to complete it!! */ if (temp & PORT_RESUME) { /* Remote Wakeup received? */ if (!ehci->reset_done[wIndex]) { /* resume signaling for 20 msec */ ehci->reset_done[wIndex] = jiffies + msecs_to_jiffies(20); /* check the port again */ mod_timer(&ehci_to_hcd(ehci)->rh_timer, ehci->reset_done[wIndex]); } /* resume completed? */ else if (time_after_eq(jiffies, ehci->reset_done[wIndex])) { clear_bit(wIndex, &ehci->suspended_ports); set_bit(wIndex, &ehci->port_c_suspend); ehci->reset_done[wIndex] = 0; /* stop resume signaling */ temp = ehci_readl(ehci, status_reg); ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESUME), status_reg); retval = 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 &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); } } /* whoever resets must GetPortStatus to complete it!! */ if ((temp & PORT_RESET) && time_after_eq(jiffies, ehci->reset_done[wIndex])) { 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 = 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)); } if (!(temp & (PORT_RESUME|PORT_RESET))) ehci->reset_done[wIndex] = 0; /* 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 khubd * 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); ehci->reset_done[wIndex] = 0; if (temp & PORT_PE) set_bit(wIndex, &ehci->port_c_suspend); } 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; #ifndef VERBOSE_DEBUG if (status & ~0xffff) /* only if wPortChange is interesting */ #endif 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 hostpc feature */ temp &= ~PORT_WKCONN_E; temp |= PORT_WKDISC_E | PORT_WKOC_E; ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); if (hostpc_reg) { 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"); } set_bit(wIndex, &ehci->suspended_ports); break; case USB_PORT_FEAT_POWER: if (HCS_PPC (ehci->hcs_params)) ehci_writel(ehci, temp | PORT_POWER, status_reg); break; case USB_PORT_FEAT_RESET: if (temp & 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 { ehci_vdbg (ehci, "port %d reset\n", wIndex + 1); 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); } 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: if (!selector || selector > 5) goto error; ehci_quiesce(ehci); /* 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); } ehci_halt(ehci); 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; } static void __maybe_unused 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 __maybe_unused 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; }