1205 lines
40 KiB
C
1205 lines
40 KiB
C
/*
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* Copyright (C) 2001-2004 by David Brownell
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* this file is part of ehci-hcd.c */
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/*-------------------------------------------------------------------------*/
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/*
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* EHCI Root Hub ... the nonsharable stuff
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*
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* Registers don't need cpu_to_le32, that happens transparently
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*/
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/*-------------------------------------------------------------------------*/
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//#include <linux/usb/otg.h>
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#include <usb_host_hub.h>
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#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
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static void unlink_empty_async_suspended(struct ehci_hcd *ehci);
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//static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
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//{
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// return !udev->maxchild && udev->persist_enabled &&
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// udev->bus->root_hub->speed < USB_SPEED_HIGH;
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//}
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//
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///* After a power loss, ports that were owned by the companion must be
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// * reset so that the companion can still own them.
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// */
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//static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
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//{
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// u32 __iomem *reg;
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// u32 status;
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// int port;
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// __le32 buf;
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// struct hc_gen_hcd * *hcd = ehci_to_hcd(ehci);
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//
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// if (!ehci->owned_ports)
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// return;
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//
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// /*
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// * USB 1.1 devices are mostly HIDs, which don't need to persist across
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// * suspends. If we ensure that none of our companion's devices have
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// * persist_enabled (by looking through all USB 1.1 buses in the system),
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// * we can skip this and avoid slowing resume down. Devices without
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// * persist will just get reenumerated shortly after resume anyway.
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// */
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// if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
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// return;
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//
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// /* Make sure the ports are powered */
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// if (usb_test_bit(port, &ehci->owned_ports)) {
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// reg = &ehci->regs->port_status[port];
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// status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
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// if (!(status & PORT_POWER))
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// ehci_port_power(ehci, port, true);
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// }
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// }
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//
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// /* Give the connections some time to appear */
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// hal_msleep(20);
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//
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// spin_lock_irq(&ehci->lock);
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// if (usb_test_bit(port, &ehci->owned_ports)) {
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// reg = &ehci->regs->port_status[port];
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// status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
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//
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// /* Port already owned by companion? */
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// if (status & PORT_OWNER)
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// usb_clear_bit(port, &ehci->owned_ports);
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// else if (usb_test_bit(port, &ehci->companion_ports))
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// ehci_writel(ehci, status & ~PORT_PE, reg);
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// else {
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// spin_unlock_irq(&ehci->lock);
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// ehci_hub_control(hcd, SetPortFeature,
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// USB_PORT_FEAT_RESET, port + 1,
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// NULL, 0);
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// spin_lock_irq(&ehci->lock);
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// }
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// }
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// }
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// spin_unlock_irq(&ehci->lock);
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//
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// if (!ehci->owned_ports)
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// return;
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// hal_msleep(90); /* Wait for resets to complete */
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//
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// spin_lock_irq(&ehci->lock);
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// if (usb_test_bit(port, &ehci->owned_ports)) {
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// spin_unlock_irq(&ehci->lock);
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// ehci_hub_control(hcd, GetPortStatus,
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// 0, port + 1,
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// (char *) &buf, sizeof(buf));
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// spin_lock_irq(&ehci->lock);
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//
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// /* The companion should now own the port,
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// * but if something went wrong the port must not
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// * remain enabled.
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// */
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// reg = &ehci->regs->port_status[port];
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// status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
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// if (status & PORT_OWNER)
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// ehci_writel(ehci, status | PORT_CSC, reg);
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// else {
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// ehci_dbg("failed handover port %d: %x\n",
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// port + 1, status);
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// ehci_writel(ehci, status & ~PORT_PE, reg);
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// }
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// }
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// }
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//
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// ehci->owned_ports = 0;
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// spin_unlock_irq(&ehci->lock);
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//}
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//static int ehci_port_change(struct ehci_hcd *ehci)
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//{
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// int i = HCS_N_PORTS(ehci->hcs_params);
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//
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// /* First check if the controller indicates a change event */
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//
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// if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
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// return 1;
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//
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// /*
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// * Not all controllers appear to update this while going from D3 to D0,
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// * so check the individual port status registers as well
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// */
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//
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// while (i--)
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// if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
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// return 1;
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//
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// return 0;
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//}
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//void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
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// bool suspending, bool do_wakeup)
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//{
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// int port;
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// u32 temp;
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//
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// /* If remote wakeup is enabled for the root hub but disabled
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// * for the controller, we must adjust all the port wakeup flags
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// * when the controller is suspended or resumed. In all other
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// * cases they don't need to be changed.
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// */
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// if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
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// return;
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//
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// spin_lock_irq(&ehci->lock);
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//
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// /* clear phy low-power mode before changing wakeup flags */
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// if (ehci->has_tdi_phy_lpm) {
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
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//
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// temp = ehci_readl(ehci, hostpc_reg);
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// ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
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// }
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// spin_unlock_irq(&ehci->lock);
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// hal_msleep(5);
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// spin_lock_irq(&ehci->lock);
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// }
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//
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// u32 __iomem *reg = &ehci->regs->port_status[port];
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// u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
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// u32 t2 = t1 & ~PORT_WAKE_BITS;
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//
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// /* If we are suspending the controller, clear the flags.
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// * If we are resuming the controller, set the wakeup flags.
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// */
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// if (!suspending) {
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// if (t1 & PORT_CONNECT)
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// t2 |= PORT_WKOC_E | PORT_WKDISC_E;
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// else
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// t2 |= PORT_WKOC_E | PORT_WKCONN_E;
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// }
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// ehci_writel(ehci, t2, reg);
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// }
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//
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// /* enter phy low-power mode again */
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// if (ehci->has_tdi_phy_lpm) {
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
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//
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// temp = ehci_readl(ehci, hostpc_reg);
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// ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
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// }
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// }
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//
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// /* Does the root hub have a port wakeup pending? */
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// if (!suspending && ehci_port_change(ehci))
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// usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
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//
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// spin_unlock_irq(&ehci->lock);
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//}
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//EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags);
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int ehci_bus_suspend (struct hc_gen_dev *hcd)
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{
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__inf("ERR: Not support suspend.\n");
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return 0;
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}
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int ehci_bus_resume (struct hc_gen_dev *hcd)
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{
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__inf("ERR: Not support resume.\n");
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return 0;
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}
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//static int ehci_bus_suspend (struct hc_gen_hcd **hcd)
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//{
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// struct ehci_hcd *ehci = hcd_to_ehci (hcd);
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// int port;
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// int mask;
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// int changed;
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// bool fs_idle_delay;
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//
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// ehci_dbg("suspend root hub\n");
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//
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// if (time_before (jiffies, ehci->next_statechange))
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// hal_msleep(5);
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//
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// /* stop the schedules */
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// ehci_quiesce(ehci);
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//
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// spin_lock_irq (&ehci->lock);
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// if (ehci->rh_state < EHCI_RH_RUNNING)
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// goto done;
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//
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// /* Once the controller is stopped, port resumes that are already
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// * in progress won't complete. Hence if remote wakeup is enabled
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// * for the root hub and any ports are in the middle of a resume or
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// * remote wakeup, we must fail the suspend.
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// */
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// if (hcd->self.root_hub->do_remote_wakeup) {
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// if (ehci->resuming_ports) {
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// spin_unlock_irq(&ehci->lock);
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// ehci_dbg("suspend failed because a port is resuming\n");
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// return -EBUSY;
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// }
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// }
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//
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// /* Unlike other USB host controller types, EHCI doesn't have
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// * any notion of "global" or bus-wide suspend. The driver has
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// * to manually suspend all the active unsuspended ports, and
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// * then manually resume them in the bus_resume() routine.
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// */
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// ehci->bus_suspended = 0;
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// ehci->owned_ports = 0;
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// changed = 0;
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// fs_idle_delay = false;
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// u32 __iomem *reg = &ehci->regs->port_status [port];
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// u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
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// u32 t2 = t1 & ~PORT_WAKE_BITS;
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//
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// /* keep track of which ports we suspend */
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// if (t1 & PORT_OWNER)
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// usb_set_bit(port, &ehci->owned_ports);
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// else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
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// t2 |= PORT_SUSPEND;
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// usb_set_bit(port, &ehci->bus_suspended);
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// }
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//
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// /* enable remote wakeup on all ports, if told to do so */
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// if (hcd->self.root_hub->do_remote_wakeup) {
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// /* only enable appropriate wake bits, otherwise the
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// * hardware can not go phy low power mode. If a race
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// * condition happens here(connection change during bits
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// * set), the port change detection will finally fix it.
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// */
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// if (t1 & PORT_CONNECT)
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// t2 |= PORT_WKOC_E | PORT_WKDISC_E;
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// else
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// t2 |= PORT_WKOC_E | PORT_WKCONN_E;
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// }
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//
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// if (t1 != t2) {
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// /*
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// * On some controllers, Wake-On-Disconnect will
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// * generate false wakeup signals until the bus
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// * switches over to full-speed idle. For their
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// * sake, add a delay if we need one.
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// */
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// if ((t2 & PORT_WKDISC_E) &&
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// ehci_port_speed(ehci, t2) ==
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// USB_PORT_STAT_HIGH_SPEED)
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// fs_idle_delay = true;
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// ehci_writel(ehci, t2, reg);
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// changed = 1;
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// }
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// }
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// spin_unlock_irq(&ehci->lock);
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//
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// if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
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// /*
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// * Wait for HCD to enter low-power mode or for the bus
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// * to switch to full-speed idle.
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// */
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// usleep_range(5000, 5500);
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// }
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//
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// if (changed && ehci->has_tdi_phy_lpm) {
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// spin_lock_irq(&ehci->lock);
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// port = HCS_N_PORTS(ehci->hcs_params);
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// while (port--) {
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// u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
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// u32 t3;
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//
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// t3 = ehci_readl(ehci, hostpc_reg);
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// ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
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// t3 = ehci_readl(ehci, hostpc_reg);
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// ehci_dbg("Port %d phy low-power mode %s\n",
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// port, (t3 & HOSTPC_PHCD) ?
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// "succeeded" : "failed");
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// }
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// spin_unlock_irq(&ehci->lock);
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// }
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//
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// /* Apparently some devices need a >= 1-uframe delay here */
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// if (ehci->bus_suspended)
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// udelay(150);
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//
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// /* turn off now-idle HC */
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// ehci_halt (ehci);
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//
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// spin_lock_irq(&ehci->lock);
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// if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
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// ehci_handle_controller_death(ehci);
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// if (ehci->rh_state != EHCI_RH_RUNNING)
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// goto done;
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// ehci->rh_state = EHCI_RH_SUSPENDED;
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//
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// unlink_empty_async_suspended(ehci);
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//
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// /* Any IAA cycle that started before the suspend is now invalid */
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// end_iaa_cycle(ehci);
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// ehci_handle_start_intr_unlinks(ehci);
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// ehci_handle_intr_unlinks(ehci);
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// end_free_itds(ehci);
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//
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// /* allow remote wakeup */
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// mask = INTR_MASK;
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// if (!hcd->self.root_hub->do_remote_wakeup)
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// mask &= ~STS_PCD;
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// ehci_writel(ehci, mask, &ehci->regs->intr_enable);
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// ehci_readl(ehci, &ehci->regs->intr_enable);
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//
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// done:
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// ehci->next_statechange = jiffies + msecs_to_jiffies(10);
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// ehci->enabled_hrtimer_events = 0;
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// ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
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// spin_unlock_irq (&ehci->lock);
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//
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// hrtimer_cancel(&ehci->hrtimer);
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// return 0;
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//}
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/* caller has locked the root hub, and should reset/reinit on error */
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//static int ehci_bus_resume (struct hc_gen_hcd **hcd)
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//{
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// struct ehci_hcd *ehci = hcd_to_ehci (hcd);
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// u32 temp;
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// u32 power_okay;
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// int i;
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// unsigned long resume_needed = 0;
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//
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// if (time_before (jiffies, ehci->next_statechange))
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// hal_msleep(5);
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// spin_lock_irq (&ehci->lock);
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// if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
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// goto shutdown;
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//
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// if (unlikely(ehci->debug)) {
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// if (!dbgp_reset_prep(hcd))
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// ehci->debug = NULL;
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// else
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// dbgp_external_startup(hcd);
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// }
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//
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// /* Ideally and we've got a real resume here, and no port's power
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// * was lost. (For PCI, that means Vaux was maintained.) But we
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// * could instead be restoring a swsusp snapshot -- so that BIOS was
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// * the last user of the controller, not reset/pm hardware keeping
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// * state we gave to it.
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// */
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// power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
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// ehci_dbg("resume root hub%s\n",
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// power_okay ? "" : " after power loss");
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//
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// /* at least some APM implementations will try to deliver
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// * IRQs right away, so delay them until we're ready.
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// */
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// ehci_writel(ehci, 0, &ehci->regs->intr_enable);
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//
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// /* re-init operational registers */
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// ehci_writel(ehci, 0, &ehci->regs->segment);
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// ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
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// ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
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//
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// /* restore CMD_RUN, framelist size, and irq threshold */
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// ehci->command |= CMD_RUN;
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// ehci_writel(ehci, ehci->command, &ehci->regs->command);
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// ehci->rh_state = EHCI_RH_RUNNING;
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//
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// /*
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// * According to Bugzilla #8190, the port status for some controllers
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// * will be wrong without a delay. At their wrong status, the port
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// * is enabled, but not suspended neither resumed.
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// */
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// i = HCS_N_PORTS(ehci->hcs_params);
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// while (i--) {
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// temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
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// if ((temp & PORT_PE) &&
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// !(temp & (PORT_SUSPEND | PORT_RESUME))) {
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// ehci_dbg("Port status(0x%x) is wrong\n", temp);
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// spin_unlock_irq(&ehci->lock);
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// hal_msleep(8);
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// spin_lock_irq(&ehci->lock);
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// 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 (usb_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);
|
|
// hal_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 (usb_test_bit(i, &ehci->bus_suspended) &&
|
|
// (temp & PORT_SUSPEND)) {
|
|
// temp |= PORT_RESUME;
|
|
// usb_set_bit(i, &resume_needed);
|
|
// }
|
|
// ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
|
|
// }
|
|
//
|
|
// /*
|
|
// * hal_msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
|
|
// * port
|
|
// */
|
|
// if (resume_needed) {
|
|
// spin_unlock_irq(&ehci->lock);
|
|
// hal_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 (usb_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;
|
|
//}
|
|
//
|
|
//#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) {
|
|
hal_spin_lock(&ehci->lock);
|
|
port_status = ehci_readl(ehci,
|
|
&ehci->regs->port_status[portnum]);
|
|
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,
|
|
&ehci->regs->port_status[portnum]);
|
|
}
|
|
hal_spin_unlock(&ehci->lock);
|
|
if (try > 1)
|
|
hal_msleep(5);
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int check_reset_complete (
|
|
struct ehci_hcd *ehci,
|
|
int index,
|
|
u32 *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("Failed to enable port %d on root hub TT\n",
|
|
// index+1);
|
|
// return port_status;
|
|
//}
|
|
|
|
ehci_dbg("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("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 */
|
|
|
|
int ehci_hub_status_data (struct hc_gen_dev *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)
|
|
// 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)? */
|
|
flags = hal_spin_lock_irqsave(&ehci->lock);
|
|
|
|
/* 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 || usb_test_bit(i, (volatile uint32_t *)&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));
|
|
*/
|
|
hal_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->DeviceRemovable[0], 0, temp);
|
|
memset(&desc->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 hc_gen_dev *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 *status_reg, *hostpc_reg;
|
|
u32 temp, temp1, status;
|
|
uint32_t flags;
|
|
int retval = 0;
|
|
unsigned selector;
|
|
|
|
/*
|
|
* Avoid underflow while calculating (wIndex & 0xff) - 1.
|
|
* The compiler might deduce that wIndex can never be 0 and then
|
|
* optimize away the tests for !wIndex below.
|
|
*/
|
|
temp = wIndex & 0xff;
|
|
temp -= (temp > 0);
|
|
status_reg = &ehci->regs->port_status[temp];
|
|
hostpc_reg = &ehci->regs->hostpc[temp];
|
|
|
|
//printf("[%s %d] typeReq = 0x%x, wValue = 0x%x, wIndex = 0x%x, wLength = 0x%x, status_reg = 0x%lx\n", __func__, __LINE__,
|
|
// typeReq, wValue, wIndex, wLength, ehci_readl(ehci, status_reg));
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
flags = hal_spin_lock_irqsave(&ehci->lock);
|
|
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;
|
|
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);
|
|
hal_spin_unlock_irqrestore(&ehci->lock, flags);
|
|
hal_msleep(5);/* wait to leave low-power mode */
|
|
flags = hal_spin_lock_irqsave(&ehci->lock);
|
|
}
|
|
/* 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);
|
|
usb_set_bit(wIndex, (volatile uint32_t *)&ehci->resuming_ports);
|
|
usb_hcd_start_port_resume(&hcd->self, wIndex);
|
|
break;
|
|
case USB_PORT_FEAT_C_SUSPEND:
|
|
usb_clear_bit(wIndex, (volatile uint32_t *)&ehci->port_c_suspend);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (HCS_PPC(ehci->hcs_params)) {
|
|
hal_spin_unlock_irqrestore(&ehci->lock, flags);
|
|
ehci_port_power(ehci, wIndex, false);
|
|
flags = hal_spin_lock_irqsave(&ehci->lock);
|
|
}
|
|
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){
|
|
// 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);
|
|
// usb_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 (usb_test_bit(wIndex, (volatile uint32_t *)&ehci->resuming_ports)) {
|
|
// usb_clear_bit(wIndex, &ehci->suspended_ports);
|
|
// usb_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);
|
|
// usb_clear_bit(wIndex, &ehci->resuming_ports);
|
|
// retval = ehci_handshake(ehci, status_reg,
|
|
// PORT_RESUME, 0, 2000 /* 2msec */);
|
|
// if (retval != 0) {
|
|
// ehci_dbg("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 {
|
|
/* FIXME: we need to implement time_after_eq or
|
|
* something similar to wait reset complete.
|
|
*/
|
|
hal_spin_unlock_irqrestore(&ehci->lock, flags);
|
|
hal_msleep(50);
|
|
flags = hal_spin_lock_irqsave(&ehci->lock);
|
|
|
|
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 ("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) &&
|
|
usb_test_bit(wIndex, (volatile uint32_t *)&ehci->companion_ports)) {
|
|
temp &= ~PORT_RWC_BITS;
|
|
temp |= PORT_OWNER;
|
|
ehci_writel(ehci, temp, status_reg);
|
|
ehci_dbg("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);
|
|
status |= USB_PORT_STAT_HIGH_SPEED;
|
|
} else
|
|
//status |= ehci_port_speed(ehci, temp);
|
|
status |= USB_PORT_STAT_HIGH_SPEED;
|
|
}
|
|
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 (usb_test_bit(wIndex, &ehci->suspended_ports)) {
|
|
// usb_clear_bit(wIndex, &ehci->suspended_ports);
|
|
// usb_clear_bit(wIndex, &ehci->resuming_ports);
|
|
// ehci->reset_done[wIndex] = 0;
|
|
// if (temp & PORT_PE)
|
|
// usb_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 (usb_test_bit(wIndex, (volatile uint32_t *)&ehci->port_c_suspend))
|
|
status |= USB_PORT_STAT_C_SUSPEND << 16;
|
|
|
|
//if (status & ~0xffff) /* only if wPortChange is interesting */
|
|
//ehci_dbg("GetStatus", wIndex + 1, temp);
|
|
//put_unaligned_le32(status, buf);
|
|
*(u32 *)buf = status;
|
|
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) {
|
|
hal_spin_unlock_irqrestore(&ehci->lock, flags);
|
|
hal_msleep(5);/* 5ms for HCD enter low pwr mode */
|
|
flags = hal_spin_lock_irqsave(&ehci->lock);
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_writel(ehci, temp1 | HOSTPC_PHCD,
|
|
hostpc_reg);
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_dbg("Port%d phy low pwr mode %s\n",
|
|
wIndex, (temp1 & HOSTPC_PHCD) ?
|
|
"succeeded" : "failed");
|
|
}
|
|
usb_set_bit(wIndex, (volatile uint32_t *)&ehci->suspended_ports);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
//if (HCS_PPC(ehci->hcs_params)) {
|
|
// hal_spin_unlock_irqrestore(flags);
|
|
// ehci_port_power(ehci, wIndex, true);
|
|
// flags = hal_spin_lock_irqsave();
|
|
//}
|
|
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
|
|
&& PORT_USB11 (temp)) {
|
|
ehci_dbg("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] = 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:
|
|
//if (!selector || selector > 5)
|
|
// goto error;
|
|
//hal_spin_unlock_irqrestore(flags);
|
|
//ehci_quiesce(ehci);
|
|
//flags = hal_spin_lock_irqsave();
|
|
|
|
///* 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);
|
|
//}
|
|
|
|
//hal_spin_unlock_irqrestore(flags);
|
|
//ehci_halt(ehci);
|
|
//flags = hal_spin_lock_irqsave();
|
|
|
|
//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:
|
|
hal_spin_unlock_irqrestore(&ehci->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
static void ehci_relinquish_port(struct hc_gen_dev *hcd, int portnum)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
|
|
set_owner(ehci, --portnum, PORT_OWNER);
|
|
}
|
|
|
|
static int ehci_port_handed_over(struct hc_gen_dev *hcd, int portnum)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
u32 *reg;
|
|
|
|
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 hc_gen_dev *hcd = ehci_to_hcd(ehci);
|
|
u32 *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;
|
|
}
|