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![Alan Stern](/assets/img/avatar_default.png)
This patch (as1394) adds code to ehci-hcd, ohci-hcd, and uhci-hcd for automatically resuming the root hub when the controller is resumed, if the root hub has a wakeup request pending on some port. During resume from system sleep this doesn't matter, because the root hubs will naturally be resumed along with every other device in the system. However it _will_ matter for runtime PM: If the controller is suspended and a remote wakeup request is received then the controller will autoresume, but we need to ensure that the root hub also autoresumes. Otherwise the wakeup request would be ignored, the controller would go back to sleep, and the cycle would repeat a large number of times (I saw this happen before the patch was written). Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1125 lines
30 KiB
C
1125 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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#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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/* Give the connections some time to appear */
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msleep(20);
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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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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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}
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}
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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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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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ehci_hub_control(hcd, GetPortStatus,
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0, port + 1,
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(char *) &buf, sizeof(buf));
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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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}
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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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/* 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;
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hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
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+ HOSTPC0 + 4 * 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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msleep(5);
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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;
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hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
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+ HOSTPC0 + 4 * 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_readl(ehci, &ehci->regs->status) & STS_PCD))
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usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
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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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del_timer_sync(&ehci->watchdog);
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del_timer_sync(&ehci->iaa_watchdog);
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spin_lock_irq (&ehci->lock);
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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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port = HCS_N_PORTS(ehci->hcs_params);
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while (port--) {
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if (ehci->reset_done[port] != 0) {
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spin_unlock_irq(&ehci->lock);
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ehci_dbg(ehci, "suspend failed because "
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"port %d is resuming\n",
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port + 1);
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return -EBUSY;
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}
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}
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}
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/* stop schedules, clean any completed work */
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if (HC_IS_RUNNING(hcd->state)) {
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ehci_quiesce (ehci);
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hcd->state = HC_STATE_QUIESCING;
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}
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ehci->command = ehci_readl(ehci, &ehci->regs->command);
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ehci_work(ehci);
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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;
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u32 t3;
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hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
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+ HOSTPC0 + 4 * port);
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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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/* 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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hcd->state = HC_STATE_SUSPENDED;
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if (ehci->reclaim)
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end_unlink_async(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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ehci->next_statechange = jiffies + msecs_to_jiffies(10);
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spin_unlock_irq (&ehci->lock);
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/* ehci_work() may have re-enabled the watchdog timer, which we do not
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* want, and so we must delete any pending watchdog timer events.
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*/
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del_timer_sync(&ehci->watchdog);
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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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u8 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)) {
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spin_unlock_irq(&ehci->lock);
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return -ESHUTDOWN;
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}
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if (unlikely(ehci->debug)) {
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if (!dbgp_reset_prep())
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ehci->debug = NULL;
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else
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dbgp_external_startup();
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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_writel(ehci, ehci->command, &ehci->regs->command);
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/* Some controller/firmware combinations need a delay during which
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* they set up the port statuses. See Bugzilla #8190. */
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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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/* 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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hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
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+ HOSTPC0 + 4 * 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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}
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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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resume_needed = 1;
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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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}
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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, &ehci->bus_suspended) &&
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(temp & PORT_SUSPEND)) {
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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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(void) ehci_readl(ehci, &ehci->regs->command);
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/* maybe re-activate the schedule(s) */
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temp = 0;
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if (ehci->async->qh_next.qh)
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temp |= CMD_ASE;
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if (ehci->periodic_sched)
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temp |= CMD_PSE;
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if (temp) {
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ehci->command |= temp;
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ehci_writel(ehci, ehci->command, &ehci->regs->command);
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}
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ehci->next_statechange = jiffies + msecs_to_jiffies(5);
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hcd->state = HC_STATE_RUNNING;
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/* Now we can safely re-enable irqs */
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ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
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spin_unlock_irq (&ehci->lock);
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ehci_handover_companion_ports(ehci);
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return 0;
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}
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#else
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#define ehci_bus_suspend NULL
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#define ehci_bus_resume NULL
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#endif /* CONFIG_PM */
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/*-------------------------------------------------------------------------*/
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/* Display the ports dedicated to the companion controller */
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static ssize_t show_companion(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct ehci_hcd *ehci;
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int nports, index, n;
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int count = PAGE_SIZE;
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char *ptr = buf;
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ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
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nports = HCS_N_PORTS(ehci->hcs_params);
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for (index = 0; index < nports; ++index) {
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if (test_bit(index, &ehci->companion_ports)) {
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n = scnprintf(ptr, count, "%d\n", index + 1);
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ptr += n;
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count -= n;
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}
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}
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return ptr - buf;
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}
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/*
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* Sets the owner of a port
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*/
|
|
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);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dedicate or undedicate a port to the companion controller.
|
|
* Syntax is "[-]portnum", where a leading '-' sign means
|
|
* return control of the port to the EHCI controller.
|
|
*/
|
|
static ssize_t store_companion(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct ehci_hcd *ehci;
|
|
int portnum, new_owner;
|
|
|
|
ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
|
|
new_owner = PORT_OWNER; /* Owned by companion */
|
|
if (sscanf(buf, "%d", &portnum) != 1)
|
|
return -EINVAL;
|
|
if (portnum < 0) {
|
|
portnum = - portnum;
|
|
new_owner = 0; /* Owned by EHCI */
|
|
}
|
|
if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
|
|
return -ENOENT;
|
|
portnum--;
|
|
if (new_owner)
|
|
set_bit(portnum, &ehci->companion_ports);
|
|
else
|
|
clear_bit(portnum, &ehci->companion_ports);
|
|
set_owner(ehci, portnum, new_owner);
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
|
|
|
|
static inline void create_companion_file(struct ehci_hcd *ehci)
|
|
{
|
|
int i;
|
|
|
|
/* with integrated TT there is no companion! */
|
|
if (!ehci_is_TDI(ehci))
|
|
i = device_create_file(ehci_to_hcd(ehci)->self.controller,
|
|
&dev_attr_companion);
|
|
}
|
|
|
|
static inline void remove_companion_file(struct ehci_hcd *ehci)
|
|
{
|
|
/* with integrated TT there is no companion! */
|
|
if (!ehci_is_TDI(ehci))
|
|
device_remove_file(ehci_to_hcd(ehci)->self.controller,
|
|
&dev_attr_companion);
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int check_reset_complete (
|
|
struct ehci_hcd *ehci,
|
|
int index,
|
|
u32 __iomem *status_reg,
|
|
int port_status
|
|
) {
|
|
if (!(port_status & PORT_CONNECT))
|
|
return port_status;
|
|
|
|
/* if reset finished and it's still not enabled -- handoff */
|
|
if (!(port_status & PORT_PE)) {
|
|
|
|
/* with integrated TT, there's nobody to hand it to! */
|
|
if (ehci_is_TDI(ehci)) {
|
|
ehci_dbg (ehci,
|
|
"Failed to enable port %d on root hub TT\n",
|
|
index+1);
|
|
return port_status;
|
|
}
|
|
|
|
ehci_dbg (ehci, "port %d full speed --> companion\n",
|
|
index + 1);
|
|
|
|
// what happens if HCS_N_CC(params) == 0 ?
|
|
port_status |= PORT_OWNER;
|
|
port_status &= ~PORT_RWC_BITS;
|
|
ehci_writel(ehci, port_status, status_reg);
|
|
|
|
/* ensure 440EPX ohci controller state is operational */
|
|
if (ehci->has_amcc_usb23)
|
|
set_ohci_hcfs(ehci, 1);
|
|
} else {
|
|
ehci_dbg (ehci, "port %d high speed\n", index + 1);
|
|
/* ensure 440EPx ohci controller state is suspended */
|
|
if (ehci->has_amcc_usb23)
|
|
set_ohci_hcfs(ehci, 0);
|
|
}
|
|
|
|
return port_status;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
|
|
/* build "status change" packet (one or two bytes) from HC registers */
|
|
|
|
static int
|
|
ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
|
|
u32 temp, status = 0;
|
|
u32 mask;
|
|
int ports, i, retval = 1;
|
|
unsigned long flags;
|
|
u32 ppcd = 0;
|
|
|
|
/* if !USB_SUSPEND, root hub timers won't get shut down ... */
|
|
if (!HC_IS_RUNNING(hcd->state))
|
|
return 0;
|
|
|
|
/* init status to no-changes */
|
|
buf [0] = 0;
|
|
ports = HCS_N_PORTS (ehci->hcs_params);
|
|
if (ports > 7) {
|
|
buf [1] = 0;
|
|
retval++;
|
|
}
|
|
|
|
/* Some boards (mostly VIA?) report bogus overcurrent indications,
|
|
* causing massive log spam unless we completely ignore them. It
|
|
* may be relevant that VIA VT8235 controllers, where PORT_POWER is
|
|
* always set, seem to clear PORT_OCC and PORT_CSC when writing to
|
|
* PORT_POWER; that's surprising, but maybe within-spec.
|
|
*/
|
|
if (!ignore_oc)
|
|
mask = PORT_CSC | PORT_PEC | PORT_OCC;
|
|
else
|
|
mask = PORT_CSC | PORT_PEC;
|
|
// PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
|
|
|
|
/* no hub change reports (bit 0) for now (power, ...) */
|
|
|
|
/* port N changes (bit N)? */
|
|
spin_lock_irqsave (&ehci->lock, flags);
|
|
|
|
/* get per-port change detect bits */
|
|
if (ehci->has_ppcd)
|
|
ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
|
|
|
|
for (i = 0; i < ports; i++) {
|
|
/* leverage per-port change bits feature */
|
|
if (ehci->has_ppcd && !(ppcd & (1 << i)))
|
|
continue;
|
|
temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
|
|
|
|
/*
|
|
* Return status information even for ports with OWNER set.
|
|
* Otherwise khubd wouldn't see the disconnect event when a
|
|
* high-speed device is switched over to the companion
|
|
* controller by the user.
|
|
*/
|
|
|
|
if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
|
|
|| (ehci->reset_done[i] && time_after_eq(
|
|
jiffies, ehci->reset_done[i]))) {
|
|
if (i < 7)
|
|
buf [0] |= 1 << (i + 1);
|
|
else
|
|
buf [1] |= 1 << (i - 7);
|
|
status = STS_PCD;
|
|
}
|
|
}
|
|
/* FIXME autosuspend idle root hubs */
|
|
spin_unlock_irqrestore (&ehci->lock, flags);
|
|
return status ? retval : 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
ehci_hub_descriptor (
|
|
struct ehci_hcd *ehci,
|
|
struct usb_hub_descriptor *desc
|
|
) {
|
|
int ports = HCS_N_PORTS (ehci->hcs_params);
|
|
u16 temp;
|
|
|
|
desc->bDescriptorType = 0x29;
|
|
desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
|
|
desc->bHubContrCurrent = 0;
|
|
|
|
desc->bNbrPorts = ports;
|
|
temp = 1 + (ports / 8);
|
|
desc->bDescLength = 7 + 2 * temp;
|
|
|
|
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
|
|
memset (&desc->bitmap [0], 0, temp);
|
|
memset (&desc->bitmap [temp], 0xff, temp);
|
|
|
|
temp = 0x0008; /* per-port overcurrent reporting */
|
|
if (HCS_PPC (ehci->hcs_params))
|
|
temp |= 0x0001; /* per-port power control */
|
|
else
|
|
temp |= 0x0002; /* no power switching */
|
|
#if 0
|
|
// re-enable when we support USB_PORT_FEAT_INDICATOR below.
|
|
if (HCS_INDICATOR (ehci->hcs_params))
|
|
temp |= 0x0080; /* per-port indicators (LEDs) */
|
|
#endif
|
|
desc->wHubCharacteristics = cpu_to_le16(temp);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int ehci_hub_control (
|
|
struct usb_hcd *hcd,
|
|
u16 typeReq,
|
|
u16 wValue,
|
|
u16 wIndex,
|
|
char *buf,
|
|
u16 wLength
|
|
) {
|
|
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
|
|
int ports = HCS_N_PORTS (ehci->hcs_params);
|
|
u32 __iomem *status_reg = &ehci->regs->port_status[
|
|
(wIndex & 0xff) - 1];
|
|
u32 __iomem *hostpc_reg = NULL;
|
|
u32 temp, temp1, status;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
unsigned selector;
|
|
|
|
/*
|
|
* FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
|
|
* HCS_INDICATOR may say we can change LEDs to off/amber/green.
|
|
* (track current state ourselves) ... blink for diagnostics,
|
|
* power, "this is the one", etc. EHCI spec supports this.
|
|
*/
|
|
|
|
if (ehci->has_hostpc)
|
|
hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
|
|
+ HOSTPC0 + 4 * ((wIndex & 0xff) - 1));
|
|
spin_lock_irqsave (&ehci->lock, flags);
|
|
switch (typeReq) {
|
|
case ClearHubFeature:
|
|
switch (wValue) {
|
|
case C_HUB_LOCAL_POWER:
|
|
case C_HUB_OVER_CURRENT:
|
|
/* no hub-wide feature/status flags */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
break;
|
|
case ClearPortFeature:
|
|
if (!wIndex || wIndex > ports)
|
|
goto error;
|
|
wIndex--;
|
|
temp = ehci_readl(ehci, status_reg);
|
|
|
|
/*
|
|
* Even if OWNER is set, so the port is owned by the
|
|
* companion controller, khubd needs to be able to clear
|
|
* the port-change status bits (especially
|
|
* USB_PORT_STAT_C_CONNECTION).
|
|
*/
|
|
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_ENABLE:
|
|
ehci_writel(ehci, temp & ~PORT_PE, status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_C_ENABLE:
|
|
ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if (temp & PORT_RESET)
|
|
goto error;
|
|
if (ehci->no_selective_suspend)
|
|
break;
|
|
if (!(temp & PORT_SUSPEND))
|
|
break;
|
|
if ((temp & PORT_PE) == 0)
|
|
goto error;
|
|
|
|
/* clear phy low-power mode before resume */
|
|
if (hostpc_reg) {
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
|
|
hostpc_reg);
|
|
spin_unlock_irqrestore(&ehci->lock, flags);
|
|
msleep(5);/* wait to leave low-power mode */
|
|
spin_lock_irqsave(&ehci->lock, flags);
|
|
}
|
|
/* resume signaling for 20 msec */
|
|
temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
|
|
ehci_writel(ehci, temp | PORT_RESUME, status_reg);
|
|
ehci->reset_done[wIndex] = jiffies
|
|
+ msecs_to_jiffies(20);
|
|
break;
|
|
case USB_PORT_FEAT_C_SUSPEND:
|
|
clear_bit(wIndex, &ehci->port_c_suspend);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (HCS_PPC (ehci->hcs_params))
|
|
ehci_writel(ehci,
|
|
temp & ~(PORT_RWC_BITS | PORT_POWER),
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_C_CONNECTION:
|
|
if (ehci->has_lpm) {
|
|
/* clear PORTSC bits on disconnect */
|
|
temp &= ~PORT_LPM;
|
|
temp &= ~PORT_DEV_ADDR;
|
|
}
|
|
ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_C_RESET:
|
|
/* GetPortStatus clears reset */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
|
|
break;
|
|
case GetHubDescriptor:
|
|
ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
|
|
buf);
|
|
break;
|
|
case GetHubStatus:
|
|
/* no hub-wide feature/status flags */
|
|
memset (buf, 0, 4);
|
|
//cpu_to_le32s ((u32 *) buf);
|
|
break;
|
|
case GetPortStatus:
|
|
if (!wIndex || wIndex > ports)
|
|
goto error;
|
|
wIndex--;
|
|
status = 0;
|
|
temp = ehci_readl(ehci, status_reg);
|
|
|
|
// wPortChange bits
|
|
if (temp & PORT_CSC)
|
|
status |= USB_PORT_STAT_C_CONNECTION << 16;
|
|
if (temp & PORT_PEC)
|
|
status |= USB_PORT_STAT_C_ENABLE << 16;
|
|
|
|
if ((temp & PORT_OCC) && !ignore_oc){
|
|
status |= USB_PORT_STAT_C_OVERCURRENT << 16;
|
|
|
|
/*
|
|
* Hubs should disable port power on over-current.
|
|
* However, not all EHCI implementations do this
|
|
* automatically, even if they _do_ support per-port
|
|
* power switching; they're allowed to just limit the
|
|
* current. khubd will turn the power back on.
|
|
*/
|
|
if (HCS_PPC (ehci->hcs_params)){
|
|
ehci_writel(ehci,
|
|
temp & ~(PORT_RWC_BITS | PORT_POWER),
|
|
status_reg);
|
|
}
|
|
}
|
|
|
|
/* whoever resumes must GetPortStatus to complete it!! */
|
|
if (temp & PORT_RESUME) {
|
|
|
|
/* Remote Wakeup received? */
|
|
if (!ehci->reset_done[wIndex]) {
|
|
/* resume signaling for 20 msec */
|
|
ehci->reset_done[wIndex] = jiffies
|
|
+ msecs_to_jiffies(20);
|
|
/* check the port again */
|
|
mod_timer(&ehci_to_hcd(ehci)->rh_timer,
|
|
ehci->reset_done[wIndex]);
|
|
}
|
|
|
|
/* resume completed? */
|
|
else if (time_after_eq(jiffies,
|
|
ehci->reset_done[wIndex])) {
|
|
clear_bit(wIndex, &ehci->suspended_ports);
|
|
set_bit(wIndex, &ehci->port_c_suspend);
|
|
ehci->reset_done[wIndex] = 0;
|
|
|
|
/* stop resume signaling */
|
|
temp = ehci_readl(ehci, status_reg);
|
|
ehci_writel(ehci,
|
|
temp & ~(PORT_RWC_BITS | PORT_RESUME),
|
|
status_reg);
|
|
retval = handshake(ehci, status_reg,
|
|
PORT_RESUME, 0, 2000 /* 2msec */);
|
|
if (retval != 0) {
|
|
ehci_err(ehci,
|
|
"port %d resume error %d\n",
|
|
wIndex + 1, retval);
|
|
goto error;
|
|
}
|
|
temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
|
|
}
|
|
}
|
|
|
|
/* whoever resets must GetPortStatus to complete it!! */
|
|
if ((temp & PORT_RESET)
|
|
&& time_after_eq(jiffies,
|
|
ehci->reset_done[wIndex])) {
|
|
status |= USB_PORT_STAT_C_RESET << 16;
|
|
ehci->reset_done [wIndex] = 0;
|
|
|
|
/* force reset to complete */
|
|
ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
|
|
status_reg);
|
|
/* REVISIT: some hardware needs 550+ usec to clear
|
|
* this bit; seems too long to spin routinely...
|
|
*/
|
|
retval = handshake(ehci, status_reg,
|
|
PORT_RESET, 0, 1000);
|
|
if (retval != 0) {
|
|
ehci_err (ehci, "port %d reset error %d\n",
|
|
wIndex + 1, retval);
|
|
goto error;
|
|
}
|
|
|
|
/* see what we found out */
|
|
temp = check_reset_complete (ehci, wIndex, status_reg,
|
|
ehci_readl(ehci, status_reg));
|
|
}
|
|
|
|
if (!(temp & (PORT_RESUME|PORT_RESET)))
|
|
ehci->reset_done[wIndex] = 0;
|
|
|
|
/* transfer dedicated ports to the companion hc */
|
|
if ((temp & PORT_CONNECT) &&
|
|
test_bit(wIndex, &ehci->companion_ports)) {
|
|
temp &= ~PORT_RWC_BITS;
|
|
temp |= PORT_OWNER;
|
|
ehci_writel(ehci, temp, status_reg);
|
|
ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
|
|
temp = ehci_readl(ehci, status_reg);
|
|
}
|
|
|
|
/*
|
|
* Even if OWNER is set, there's no harm letting khubd
|
|
* see the wPortStatus values (they should all be 0 except
|
|
* for PORT_POWER anyway).
|
|
*/
|
|
|
|
if (temp & PORT_CONNECT) {
|
|
status |= USB_PORT_STAT_CONNECTION;
|
|
// status may be from integrated TT
|
|
if (ehci->has_hostpc) {
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
status |= ehci_port_speed(ehci, temp1);
|
|
} else
|
|
status |= ehci_port_speed(ehci, temp);
|
|
}
|
|
if (temp & PORT_PE)
|
|
status |= USB_PORT_STAT_ENABLE;
|
|
|
|
/* maybe the port was unsuspended without our knowledge */
|
|
if (temp & (PORT_SUSPEND|PORT_RESUME)) {
|
|
status |= USB_PORT_STAT_SUSPEND;
|
|
} else if (test_bit(wIndex, &ehci->suspended_ports)) {
|
|
clear_bit(wIndex, &ehci->suspended_ports);
|
|
ehci->reset_done[wIndex] = 0;
|
|
if (temp & PORT_PE)
|
|
set_bit(wIndex, &ehci->port_c_suspend);
|
|
}
|
|
|
|
if (temp & PORT_OC)
|
|
status |= USB_PORT_STAT_OVERCURRENT;
|
|
if (temp & PORT_RESET)
|
|
status |= USB_PORT_STAT_RESET;
|
|
if (temp & PORT_POWER)
|
|
status |= USB_PORT_STAT_POWER;
|
|
if (test_bit(wIndex, &ehci->port_c_suspend))
|
|
status |= USB_PORT_STAT_C_SUSPEND << 16;
|
|
|
|
#ifndef VERBOSE_DEBUG
|
|
if (status & ~0xffff) /* only if wPortChange is interesting */
|
|
#endif
|
|
dbg_port (ehci, "GetStatus", wIndex + 1, temp);
|
|
put_unaligned_le32(status, buf);
|
|
break;
|
|
case SetHubFeature:
|
|
switch (wValue) {
|
|
case C_HUB_LOCAL_POWER:
|
|
case C_HUB_OVER_CURRENT:
|
|
/* no hub-wide feature/status flags */
|
|
break;
|
|
default:
|
|
goto error;
|
|
}
|
|
break;
|
|
case SetPortFeature:
|
|
selector = wIndex >> 8;
|
|
wIndex &= 0xff;
|
|
if (unlikely(ehci->debug)) {
|
|
/* If the debug port is active any port
|
|
* feature requests should get denied */
|
|
if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
|
|
(readl(&ehci->debug->control) & DBGP_ENABLED)) {
|
|
retval = -ENODEV;
|
|
goto error_exit;
|
|
}
|
|
}
|
|
if (!wIndex || wIndex > ports)
|
|
goto error;
|
|
wIndex--;
|
|
temp = ehci_readl(ehci, status_reg);
|
|
if (temp & PORT_OWNER)
|
|
break;
|
|
|
|
temp &= ~PORT_RWC_BITS;
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if (ehci->no_selective_suspend)
|
|
break;
|
|
if ((temp & PORT_PE) == 0
|
|
|| (temp & PORT_RESET) != 0)
|
|
goto error;
|
|
|
|
/* After above check the port must be connected.
|
|
* Set appropriate bit thus could put phy into low power
|
|
* mode if we have hostpc feature
|
|
*/
|
|
temp &= ~PORT_WKCONN_E;
|
|
temp |= PORT_WKDISC_E | PORT_WKOC_E;
|
|
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
|
|
if (hostpc_reg) {
|
|
spin_unlock_irqrestore(&ehci->lock, flags);
|
|
msleep(5);/* 5ms for HCD enter low pwr mode */
|
|
spin_lock_irqsave(&ehci->lock, flags);
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_writel(ehci, temp1 | HOSTPC_PHCD,
|
|
hostpc_reg);
|
|
temp1 = ehci_readl(ehci, hostpc_reg);
|
|
ehci_dbg(ehci, "Port%d phy low pwr mode %s\n",
|
|
wIndex, (temp1 & HOSTPC_PHCD) ?
|
|
"succeeded" : "failed");
|
|
}
|
|
set_bit(wIndex, &ehci->suspended_ports);
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (HCS_PPC (ehci->hcs_params))
|
|
ehci_writel(ehci, temp | PORT_POWER,
|
|
status_reg);
|
|
break;
|
|
case USB_PORT_FEAT_RESET:
|
|
if (temp & PORT_RESUME)
|
|
goto error;
|
|
/* line status bits may report this as low speed,
|
|
* which can be fine if this root hub has a
|
|
* transaction translator built in.
|
|
*/
|
|
if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
|
|
&& !ehci_is_TDI(ehci)
|
|
&& PORT_USB11 (temp)) {
|
|
ehci_dbg (ehci,
|
|
"port %d low speed --> companion\n",
|
|
wIndex + 1);
|
|
temp |= PORT_OWNER;
|
|
} else {
|
|
ehci_vdbg (ehci, "port %d reset\n", wIndex + 1);
|
|
temp |= PORT_RESET;
|
|
temp &= ~PORT_PE;
|
|
|
|
/*
|
|
* caller must wait, then call GetPortStatus
|
|
* usb 2.0 spec says 50 ms resets on root
|
|
*/
|
|
ehci->reset_done [wIndex] = jiffies
|
|
+ msecs_to_jiffies (50);
|
|
}
|
|
ehci_writel(ehci, temp, status_reg);
|
|
break;
|
|
|
|
/* For downstream facing ports (these): one hub port is put
|
|
* into test mode according to USB2 11.24.2.13, then the hub
|
|
* must be reset (which for root hub now means rmmod+modprobe,
|
|
* or else system reboot). See EHCI 2.3.9 and 4.14 for info
|
|
* about the EHCI-specific stuff.
|
|
*/
|
|
case USB_PORT_FEAT_TEST:
|
|
if (!selector || selector > 5)
|
|
goto error;
|
|
ehci_quiesce(ehci);
|
|
ehci_halt(ehci);
|
|
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;
|
|
}
|