![Alan Stern](/assets/img/avatar_default.png)
This patch (as1624) prepares ehci-hcd for being split up into a core library and separate platform driver modules. A generic ehci_hc_driver structure is created, containing all the "standard" values, and a new mechanism is added whereby a driver module can specify a set of overrides to those values. In addition the ehci_setup(), ehci_suspend(), and ehci_resume() routines need to be EXPORTed for use by the drivers. As a side effect of this change, a few routines no longer need to be marked __maybe_unused. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1131 lines
30 KiB
C
1131 lines
30 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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#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
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#ifdef CONFIG_PM
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static int ehci_hub_control(
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struct usb_hcd *hcd,
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u16 typeReq,
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u16 wValue,
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u16 wIndex,
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char *buf,
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u16 wLength
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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 usb_hcd *hcd = ehci_to_hcd(ehci);
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if (!ehci->owned_ports)
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return;
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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 (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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status |= PORT_POWER;
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ehci_writel(ehci, status, reg);
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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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msleep(20);
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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 (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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/* Port already owned by companion? */
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if (status & PORT_OWNER)
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clear_bit(port, &ehci->owned_ports);
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else if (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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if (!ehci->owned_ports)
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return;
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msleep(90); /* Wait for resets to complete */
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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 (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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/* 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(ehci, "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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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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/* First check if the controller indicates a change event */
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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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* 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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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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return 0;
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}
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static 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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/* 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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spin_lock_irq(&ehci->lock);
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/* clear phy low-power mode before changing wakeup flags */
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if (ehci->has_hostpc) {
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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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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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msleep(5);
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spin_lock_irq(&ehci->lock);
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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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/* 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_vdbg(ehci, "port %d, %08x -> %08x\n",
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port + 1, t1, t2);
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ehci_writel(ehci, t2, reg);
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}
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/* enter phy low-power mode again */
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if (ehci->has_hostpc) {
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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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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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/* 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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spin_unlock_irq(&ehci->lock);
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}
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static int ehci_bus_suspend (struct usb_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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ehci_dbg(ehci, "suspend root hub\n");
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if (time_before (jiffies, ehci->next_statechange))
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msleep(5);
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/* stop the schedules */
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ehci_quiesce(ehci);
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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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/* 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(ehci, "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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/* 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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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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/* keep track of which ports we suspend */
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if (t1 & PORT_OWNER)
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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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set_bit(port, &ehci->bus_suspended);
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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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if (t1 != t2) {
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ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
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port + 1, t1, t2);
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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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if (changed && ehci->has_hostpc) {
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spin_unlock_irq(&ehci->lock);
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msleep(5); /* 5 ms for HCD to enter low-power mode */
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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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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(ehci, "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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}
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spin_unlock_irq(&ehci->lock);
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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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/* turn off now-idle HC */
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ehci_halt (ehci);
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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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end_unlink_async(ehci);
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unlink_empty_async(ehci);
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ehci_handle_intr_unlinks(ehci);
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end_free_itds(ehci);
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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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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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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 usb_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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if (time_before (jiffies, ehci->next_statechange))
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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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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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/* 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(ehci, "resume root hub%s\n",
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power_okay ? "" : " after power loss");
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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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/* 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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/* 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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* 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(ehci, "Port status(0x%x) is wrong\n", temp);
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spin_unlock_irq(&ehci->lock);
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msleep(8);
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spin_lock_irq(&ehci->lock);
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break;
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}
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}
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if (ehci->shutdown)
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goto shutdown;
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/* clear phy low-power mode before resume */
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if (ehci->bus_suspended && ehci->has_hostpc) {
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i = HCS_N_PORTS(ehci->hcs_params);
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while (i--) {
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if (test_bit(i, &ehci->bus_suspended)) {
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u32 __iomem *hostpc_reg =
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&ehci->regs->hostpc[i];
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temp = ehci_readl(ehci, hostpc_reg);
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ehci_writel(ehci, temp & ~HOSTPC_PHCD,
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hostpc_reg);
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}
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}
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spin_unlock_irq(&ehci->lock);
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msleep(5);
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spin_lock_irq(&ehci->lock);
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if (ehci->shutdown)
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goto shutdown;
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}
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/* manually resume the ports we suspended during bus_suspend() */
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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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temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
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if (test_bit(i, &ehci->bus_suspended) &&
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(temp & PORT_SUSPEND)) {
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temp |= PORT_RESUME;
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set_bit(i, &resume_needed);
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}
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ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
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}
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/* msleep for 20ms only if code is trying to resume port */
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if (resume_needed) {
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spin_unlock_irq(&ehci->lock);
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msleep(20);
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spin_lock_irq(&ehci->lock);
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if (ehci->shutdown)
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goto shutdown;
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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 (test_bit(i, &resume_needed)) {
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temp &= ~(PORT_RWC_BITS | PORT_RESUME);
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ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
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ehci_vdbg (ehci, "resumed port %d\n", i + 1);
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}
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}
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|
|
|
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) {
|
|
spin_lock_irq(&ehci->lock);
|
|
port_status = ehci_readl(ehci, status_reg);
|
|
if ((port_status & PORT_OWNER) == new_owner
|
|
|| (port_status & (PORT_OWNER | PORT_CONNECT))
|
|
== 0)
|
|
try = 0;
|
|
else {
|
|
port_status ^= PORT_OWNER;
|
|
port_status &= ~(PORT_PE | PORT_RWC_BITS);
|
|
ehci_writel(ehci, port_status, status_reg);
|
|
}
|
|
spin_unlock_irq(&ehci->lock);
|
|
if (try > 1)
|
|
msleep(5);
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int check_reset_complete (
|
|
struct ehci_hcd *ehci,
|
|
int index,
|
|
u32 __iomem *status_reg,
|
|
int port_status
|
|
) {
|
|
if (!(port_status & PORT_CONNECT))
|
|
return port_status;
|
|
|
|
/* if reset finished and it's still not enabled -- handoff */
|
|
if (!(port_status & PORT_PE)) {
|
|
|
|
/* with integrated TT, there's nobody to hand it to! */
|
|
if (ehci_is_TDI(ehci)) {
|
|
ehci_dbg (ehci,
|
|
"Failed to enable port %d on root hub TT\n",
|
|
index+1);
|
|
return port_status;
|
|
}
|
|
|
|
ehci_dbg (ehci, "port %d full speed --> companion\n",
|
|
index + 1);
|
|
|
|
// what happens if HCS_N_CC(params) == 0 ?
|
|
port_status |= PORT_OWNER;
|
|
port_status &= ~PORT_RWC_BITS;
|
|
ehci_writel(ehci, port_status, status_reg);
|
|
|
|
/* ensure 440EPX ohci controller state is operational */
|
|
if (ehci->has_amcc_usb23)
|
|
set_ohci_hcfs(ehci, 1);
|
|
} else {
|
|
ehci_dbg(ehci, "port %d reset complete, port enabled\n",
|
|
index + 1);
|
|
/* ensure 440EPx ohci controller state is suspended */
|
|
if (ehci->has_amcc_usb23)
|
|
set_ohci_hcfs(ehci, 0);
|
|
}
|
|
|
|
return port_status;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
|
|
/* build "status change" packet (one or two bytes) from HC registers */
|
|
|
|
static int
|
|
ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
|
|
u32 temp, status;
|
|
u32 mask;
|
|
int ports, i, retval = 1;
|
|
unsigned long flags;
|
|
u32 ppcd = 0;
|
|
|
|
/* init status to no-changes */
|
|
buf [0] = 0;
|
|
ports = HCS_N_PORTS (ehci->hcs_params);
|
|
if (ports > 7) {
|
|
buf [1] = 0;
|
|
retval++;
|
|
}
|
|
|
|
/* Inform the core about resumes-in-progress by returning
|
|
* a non-zero value even if there are no status changes.
|
|
*/
|
|
status = ehci->resuming_ports;
|
|
|
|
/* Some boards (mostly VIA?) report bogus overcurrent indications,
|
|
* causing massive log spam unless we completely ignore them. It
|
|
* may be relevant that VIA VT8235 controllers, where PORT_POWER is
|
|
* always set, seem to clear PORT_OCC and PORT_CSC when writing to
|
|
* PORT_POWER; that's surprising, but maybe within-spec.
|
|
*/
|
|
if (!ignore_oc)
|
|
mask = PORT_CSC | PORT_PEC | PORT_OCC;
|
|
else
|
|
mask = PORT_CSC | PORT_PEC;
|
|
// PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
|
|
|
|
/* no hub change reports (bit 0) for now (power, ...) */
|
|
|
|
/* port N changes (bit N)? */
|
|
spin_lock_irqsave (&ehci->lock, flags);
|
|
|
|
/* get per-port change detect bits */
|
|
if (ehci->has_ppcd)
|
|
ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
|
|
|
|
for (i = 0; i < ports; i++) {
|
|
/* leverage per-port change bits feature */
|
|
if (ehci->has_ppcd && !(ppcd & (1 << i)))
|
|
continue;
|
|
temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
|
|
|
|
/*
|
|
* Return status information even for ports with OWNER set.
|
|
* Otherwise khubd wouldn't see the disconnect event when a
|
|
* high-speed device is switched over to the companion
|
|
* controller by the user.
|
|
*/
|
|
|
|
if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
|
|
|| (ehci->reset_done[i] && time_after_eq(
|
|
jiffies, ehci->reset_done[i]))) {
|
|
if (i < 7)
|
|
buf [0] |= 1 << (i + 1);
|
|
else
|
|
buf [1] |= 1 << (i - 7);
|
|
status = STS_PCD;
|
|
}
|
|
}
|
|
/* FIXME autosuspend idle root hubs */
|
|
spin_unlock_irqrestore (&ehci->lock, flags);
|
|
return status ? retval : 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
ehci_hub_descriptor (
|
|
struct ehci_hcd *ehci,
|
|
struct usb_hub_descriptor *desc
|
|
) {
|
|
int ports = HCS_N_PORTS (ehci->hcs_params);
|
|
u16 temp;
|
|
|
|
desc->bDescriptorType = 0x29;
|
|
desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
|
|
desc->bHubContrCurrent = 0;
|
|
|
|
desc->bNbrPorts = ports;
|
|
temp = 1 + (ports / 8);
|
|
desc->bDescLength = 7 + 2 * temp;
|
|
|
|
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
|
|
memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
|
|
memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
|
|
|
|
temp = 0x0008; /* per-port overcurrent reporting */
|
|
if (HCS_PPC (ehci->hcs_params))
|
|
temp |= 0x0001; /* per-port power control */
|
|
else
|
|
temp |= 0x0002; /* no power switching */
|
|
#if 0
|
|
// re-enable when we support USB_PORT_FEAT_INDICATOR below.
|
|
if (HCS_INDICATOR (ehci->hcs_params))
|
|
temp |= 0x0080; /* per-port indicators (LEDs) */
|
|
#endif
|
|
desc->wHubCharacteristics = cpu_to_le16(temp);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int ehci_hub_control (
|
|
struct usb_hcd *hcd,
|
|
u16 typeReq,
|
|
u16 wValue,
|
|
u16 wIndex,
|
|
char *buf,
|
|
u16 wLength
|
|
) {
|
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
|
|
int ports = HCS_N_PORTS (ehci->hcs_params);
|
|
u32 __iomem *status_reg = &ehci->regs->port_status[
|
|
(wIndex & 0xff) - 1];
|
|
u32 __iomem *hostpc_reg = &ehci->regs->hostpc[(wIndex & 0xff) - 1];
|
|
u32 temp, temp1, status;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
unsigned selector;
|
|
|
|
/*
|
|
* FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
|
|
* HCS_INDICATOR may say we can change LEDs to off/amber/green.
|
|
* (track current state ourselves) ... blink for diagnostics,
|
|
* power, "this is the one", etc. EHCI spec supports this.
|
|
*/
|
|
|
|
spin_lock_irqsave (&ehci->lock, flags);
|
|
switch (typeReq) {
|
|
case ClearHubFeature:
|
|
switch (wValue) {
|
|
case C_HUB_LOCAL_POWER:
|
|
case C_HUB_OVER_CURRENT:
|
|
/* no hub-wide feature/status flags */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
break;
|
|
case ClearPortFeature:
|
|
if (!wIndex || wIndex > ports)
|
|
goto error;
|
|
wIndex--;
|
|
temp = ehci_readl(ehci, status_reg);
|
|
temp &= ~PORT_RWC_BITS;
|
|
|
|
/*
|
|
* Even if OWNER is set, so the port is owned by the
|
|
* companion controller, 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_PEC, status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if (temp & PORT_RESET)
|
|
goto error;
|
|
if (ehci->no_selective_suspend)
|
|
break;
|
|
#ifdef CONFIG_USB_OTG
|
|
if ((hcd->self.otg_port == (wIndex + 1))
|
|
&& hcd->self.b_hnp_enable) {
|
|
otg_start_hnp(hcd->phy->otg);
|
|
break;
|
|
}
|
|
#endif
|
|
if (!(temp & PORT_SUSPEND))
|
|
break;
|
|
if ((temp & PORT_PE) == 0)
|
|
goto error;
|
|
|
|
/* clear phy low-power mode before resume */
|
|
if (ehci->has_hostpc) {
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
|
|
hostpc_reg);
|
|
spin_unlock_irqrestore(&ehci->lock, flags);
|
|
msleep(5);/* wait to leave low-power mode */
|
|
spin_lock_irqsave(&ehci->lock, flags);
|
|
}
|
|
/* resume signaling for 20 msec */
|
|
temp &= ~PORT_WAKE_BITS;
|
|
ehci_writel(ehci, temp | PORT_RESUME, status_reg);
|
|
ehci->reset_done[wIndex] = jiffies
|
|
+ msecs_to_jiffies(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_POWER,
|
|
status_reg);
|
|
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. 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;
|
|
|
|
/* After above check the port must be connected.
|
|
* Set appropriate bit thus could put phy into low power
|
|
* mode if we have hostpc feature
|
|
*/
|
|
temp &= ~PORT_WKCONN_E;
|
|
temp |= PORT_WKDISC_E | PORT_WKOC_E;
|
|
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
|
|
if (ehci->has_hostpc) {
|
|
spin_unlock_irqrestore(&ehci->lock, flags);
|
|
msleep(5);/* 5ms for HCD enter low pwr mode */
|
|
spin_lock_irqsave(&ehci->lock, flags);
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_writel(ehci, temp1 | HOSTPC_PHCD,
|
|
hostpc_reg);
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
|
|
wIndex, (temp1 & HOSTPC_PHCD) ?
|
|
"succeeded" : "failed");
|
|
}
|
|
set_bit(wIndex, &ehci->suspended_ports);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (HCS_PPC (ehci->hcs_params))
|
|
ehci_writel(ehci, temp | PORT_POWER,
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_RESET:
|
|
if (temp & PORT_RESUME)
|
|
goto error;
|
|
/* line status bits may report this as low speed,
|
|
* which can be fine if this root hub has a
|
|
* transaction translator built in.
|
|
*/
|
|
if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
|
|
&& !ehci_is_TDI(ehci)
|
|
&& PORT_USB11 (temp)) {
|
|
ehci_dbg (ehci,
|
|
"port %d low speed --> companion\n",
|
|
wIndex + 1);
|
|
temp |= PORT_OWNER;
|
|
} else {
|
|
ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
|
|
temp |= PORT_RESET;
|
|
temp &= ~PORT_PE;
|
|
|
|
/*
|
|
* caller must wait, then call GetPortStatus
|
|
* usb 2.0 spec says 50 ms resets on root
|
|
*/
|
|
ehci->reset_done [wIndex] = jiffies
|
|
+ msecs_to_jiffies (50);
|
|
}
|
|
ehci_writel(ehci, temp, status_reg);
|
|
break;
|
|
|
|
/* For downstream facing ports (these): one hub port is put
|
|
* into test mode according to USB2 11.24.2.13, then the hub
|
|
* must be reset (which for root hub now means rmmod+modprobe,
|
|
* or else system reboot). See EHCI 2.3.9 and 4.14 for info
|
|
* about the EHCI-specific stuff.
|
|
*/
|
|
case USB_PORT_FEAT_TEST:
|
|
if (!selector || selector > 5)
|
|
goto error;
|
|
spin_unlock_irqrestore(&ehci->lock, flags);
|
|
ehci_quiesce(ehci);
|
|
spin_lock_irqsave(&ehci->lock, flags);
|
|
|
|
/* Put all enabled ports into suspend */
|
|
while (ports--) {
|
|
u32 __iomem *sreg =
|
|
&ehci->regs->port_status[ports];
|
|
|
|
temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
|
|
if (temp & PORT_PE)
|
|
ehci_writel(ehci, temp | PORT_SUSPEND,
|
|
sreg);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ehci->lock, flags);
|
|
ehci_halt(ehci);
|
|
spin_lock_irqsave(&ehci->lock, flags);
|
|
|
|
temp = ehci_readl(ehci, status_reg);
|
|
temp |= selector << 16;
|
|
ehci_writel(ehci, temp, status_reg);
|
|
break;
|
|
|
|
default:
|
|
goto error;
|
|
}
|
|
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
|
|
break;
|
|
|
|
default:
|
|
error:
|
|
/* "stall" on error */
|
|
retval = -EPIPE;
|
|
}
|
|
error_exit:
|
|
spin_unlock_irqrestore (&ehci->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
|
|
if (ehci_is_TDI(ehci))
|
|
return;
|
|
set_owner(ehci, --portnum, PORT_OWNER);
|
|
}
|
|
|
|
static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
u32 __iomem *reg;
|
|
|
|
if (ehci_is_TDI(ehci))
|
|
return 0;
|
|
reg = &ehci->regs->port_status[portnum - 1];
|
|
return ehci_readl(ehci, reg) & PORT_OWNER;
|
|
}
|