| /* |
| * 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 <linux/usb/otg.h> |
| |
| #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) { |
| if (ehci->resuming_ports) { |
| spin_unlock_irq(&ehci->lock); |
| ehci_dbg(ehci, "suspend failed because a port is resuming\n"); |
| 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)) { |
| /*clear RS bit before setting SUSP bit |
| * and wait for HCH to get set*/ |
| if (ehci->susp_sof_bug) |
| ehci_halt(ehci); |
| |
| 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); |
| |
| /*if this bit is set, controller is already haled*/ |
| if (!ehci->susp_sof_bug) |
| ehci_halt(ehci); /* turn off now-idle HC */ |
| |
| 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); |
| |
| /*CMD_RUN will be set after, PORT_RESUME gets cleared*/ |
| if (ehci->resume_sof_bug) |
| ehci->command &= ~CMD_RUN; |
| /* 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]); |
| } |
| |
| if (ehci->resume_sof_bug && resume_needed) { |
| /* root hub has only one port. |
| * PORT_RESUME gets cleared automatically. */ |
| handshake(ehci, &ehci->regs->port_status[0], PORT_RESUME, 0, |
| 20000); |
| ehci_writel(ehci, ehci_readl(ehci, |
| &ehci->regs->command) | CMD_RUN, |
| &ehci->regs->command); |
| goto skip_clear_resume; |
| } |
| |
| /* 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); |
| } |
| } |
| |
| skip_clear_resume: |
| (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; |
| 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++; |
| } |
| |
| /* 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) |
| 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); |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| #ifdef CONFIG_USB_EHCI_EHSET |
| |
| #define EHSET_TEST_SINGLE_STEP_SET_FEATURE 0x06 |
| |
| static void usb_ehset_completion(struct urb *urb) |
| { |
| struct completion *done = urb->context; |
| |
| complete(done); |
| } |
| static int submit_single_step_set_feature( |
| struct usb_hcd *hcd, |
| struct urb *urb, |
| int is_setup |
| ); |
| |
| /* Allocate a URB and initialize the various fields of it. |
| * This API is used by the single_step_set_feature test of |
| * EHSET where IN packet of the GetDescriptor request is |
| * sent after 15secs of the SETUP packet. |
| * Return NULL if failed. |
| */ |
| static struct urb * |
| request_single_step_set_feature_urb( |
| struct usb_device *udev, |
| void *dr, |
| void *buf, |
| struct completion *done |
| ) { |
| struct urb *urb; |
| struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
| struct usb_host_endpoint *ep; |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) |
| return NULL; |
| |
| urb->pipe = usb_rcvctrlpipe(udev, 0); |
| ep = (usb_pipein(urb->pipe) ? udev->ep_in : udev->ep_out) |
| [usb_pipeendpoint(urb->pipe)]; |
| if (!ep) { |
| usb_free_urb(urb); |
| return NULL; |
| } |
| |
| /* Initialize the various URB fields as these are used |
| * by the HCD driver to queue it and as well as |
| * when completion happens. |
| */ |
| urb->ep = ep; |
| urb->dev = udev; |
| urb->setup_packet = (void *)dr; |
| urb->transfer_buffer = buf; |
| urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; |
| urb->complete = usb_ehset_completion; |
| urb->status = -EINPROGRESS; |
| urb->actual_length = 0; |
| urb->transfer_flags = (urb->transfer_flags & ~URB_DIR_MASK) |
| | URB_DIR_IN ; |
| usb_get_urb(urb); |
| atomic_inc(&urb->use_count); |
| atomic_inc(&urb->dev->urbnum); |
| urb->setup_dma = dma_map_single( |
| hcd->self.controller, |
| urb->setup_packet, |
| sizeof(struct usb_ctrlrequest), |
| DMA_TO_DEVICE); |
| urb->transfer_dma = dma_map_single( |
| hcd->self.controller, |
| urb->transfer_buffer, |
| urb->transfer_buffer_length, |
| DMA_FROM_DEVICE); |
| urb->context = done; |
| return urb; |
| } |
| |
| static int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) |
| { |
| int retval = -ENOMEM; |
| struct usb_ctrlrequest *dr; |
| struct urb *urb; |
| struct usb_device *udev ; |
| struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| struct usb_device_descriptor *buf; |
| DECLARE_COMPLETION_ONSTACK(done); |
| |
| /*Obtain udev of the rhub's child port */ |
| udev = hcd->self.root_hub->children[port]; |
| if (!udev) { |
| ehci_err(ehci, "No device attached to the RootHub\n"); |
| return -ENODEV; |
| } |
| buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
| if (!dr) { |
| kfree(buf); |
| return -ENOMEM; |
| } |
| |
| /* Fill Setup packet for GetDescriptor */ |
| dr->bRequestType = USB_DIR_IN; |
| dr->bRequest = USB_REQ_GET_DESCRIPTOR; |
| dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); |
| dr->wIndex = 0; |
| dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); |
| urb = request_single_step_set_feature_urb(udev, dr, buf, &done); |
| if (!urb) |
| goto cleanup; |
| |
| /* Now complete just the SETUP stage */ |
| retval = submit_single_step_set_feature(hcd, urb, 1); |
| if (retval) |
| goto out1; |
| if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { |
| usb_kill_urb(urb); |
| retval = -ETIMEDOUT; |
| ehci_err(ehci, "%s SETUP stage timed out on ep0\n", __func__); |
| goto out1; |
| } |
| msleep(15 * 1000); |
| /* Complete remaining DATA and status stages */ |
| /* No need to free the URB, we can reuse the same */ |
| urb->status = -EINPROGRESS; |
| usb_get_urb(urb); |
| atomic_inc(&urb->use_count); |
| atomic_inc(&urb->dev->urbnum); |
| retval = submit_single_step_set_feature(hcd, urb, 0); |
| if (!retval && !wait_for_completion_timeout(&done, |
| msecs_to_jiffies(2000))) { |
| usb_kill_urb(urb); |
| retval = -ETIMEDOUT; |
| ehci_err(ehci, "%s IN stage timed out on ep0\n", __func__); |
| } |
| out1: |
| usb_free_urb(urb); |
| cleanup: |
| kfree(dr); |
| kfree(buf); |
| return retval; |
| } |
| #endif |
| /*-------------------------------------------------------------------------*/ |
| |
| 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, cmd = 0; |
| 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); |
| clear_bit(wIndex, &ehci->resuming_ports); |
| 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; |
| clear_bit(wIndex, &ehci->resuming_ports); |
| |
| /* 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; |
| clear_bit(wIndex, &ehci->resuming_ports); |
| } |
| |
| /* 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); |
| clear_bit(wIndex, &ehci->resuming_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; |
| /*port gets suspended as part of bus suspend routine*/ |
| if (!ehci->susp_sof_bug) |
| ehci_writel(ehci, temp | PORT_SUSPEND, |
| status_reg); |
| #ifdef CONFIG_USB_OTG |
| if (hcd->self.otg_port == (wIndex + 1) && |
| hcd->self.b_hnp_enable) { |
| set_bit(wIndex, &ehci->suspended_ports); |
| otg_start_hnp(ehci->transceiver->otg); |
| break; |
| } |
| #endif |
| /* 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; |
| if (ehci->susp_sof_bug) |
| ehci_writel(ehci, temp, status_reg); |
| else |
| 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); |
| } |
| |
| if (ehci->reset_sof_bug && (temp & PORT_RESET)) { |
| cmd = ehci_readl(ehci, &ehci->regs->command); |
| cmd &= ~CMD_RUN; |
| ehci_writel(ehci, cmd, &ehci->regs->command); |
| if (handshake(ehci, &ehci->regs->status, |
| STS_HALT, STS_HALT, 16 * 125)) |
| ehci_info(ehci, |
| "controller halt failed\n"); |
| } |
| ehci_writel(ehci, temp, status_reg); |
| if (ehci->reset_sof_bug && (temp & PORT_RESET) |
| && hcd->driver->enable_ulpi_control) { |
| hcd->driver->enable_ulpi_control(hcd, |
| PORT_RESET); |
| spin_unlock_irqrestore(&ehci->lock, flags); |
| usleep_range(50000, 55000); |
| if (handshake(ehci, status_reg, |
| PORT_RESET, 0, 10 * 1000)) |
| ehci_info(ehci, |
| "failed to clear reset\n"); |
| spin_lock_irqsave(&ehci->lock, flags); |
| hcd->driver->disable_ulpi_control(hcd); |
| cmd |= CMD_RUN; |
| ehci_writel(ehci, cmd, &ehci->regs->command); |
| } |
| 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) { |
| 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); |
| } |
| #ifdef CONFIG_USB_EHCI_EHSET |
| else if (selector |
| == EHSET_TEST_SINGLE_STEP_SET_FEATURE) { |
| spin_unlock_irqrestore(&ehci->lock, flags); |
| retval = ehset_single_step_set_feature(hcd, |
| wIndex); |
| spin_lock_irqsave(&ehci->lock, flags); |
| } |
| #endif |
| else |
| goto error; |
| 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; |
| } |