867 lines
23 KiB
C
867 lines
23 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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#ifdef CONFIG_USB_PERSIST
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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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#else /* CONFIG_USB_PERSIST */
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static inline void ehci_handover_companion_ports(struct ehci_hcd *ehci)
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{ }
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#endif
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#ifdef CONFIG_PM
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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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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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port = HCS_N_PORTS (ehci->hcs_params);
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spin_lock_irq (&ehci->lock);
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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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if (ehci->reclaim)
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ehci->reclaim_ready = 1;
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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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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;
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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 */
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if (device_may_wakeup(&hcd->self.root_hub->dev))
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t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E;
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else
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t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E);
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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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}
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}
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/* turn off now-idle HC */
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del_timer_sync (&ehci->watchdog);
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ehci_halt (ehci);
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hcd->state = HC_STATE_SUSPENDED;
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/* allow remote wakeup */
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mask = INTR_MASK;
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if (!device_may_wakeup(&hcd->self.root_hub->dev))
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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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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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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 (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
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spin_unlock_irq(&ehci->lock);
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return -ESHUTDOWN;
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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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mdelay(8);
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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
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| PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E);
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if (test_bit(i, &ehci->bus_suspended) &&
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(temp & PORT_SUSPEND)) {
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ehci->reset_done [i] = jiffies + msecs_to_jiffies (20);
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temp |= PORT_RESUME;
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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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i = HCS_N_PORTS (ehci->hcs_params);
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mdelay (20);
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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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if (!power_okay)
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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 class_device *class_dev, 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(class_get_devdata(class_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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* Dedicate or undedicate a port to the companion controller.
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* Syntax is "[-]portnum", where a leading '-' sign means
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* return control of the port to the EHCI controller.
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*/
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static ssize_t store_companion(struct class_device *class_dev,
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const char *buf, size_t count)
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{
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struct ehci_hcd *ehci;
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int portnum, new_owner, try;
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u32 __iomem *status_reg;
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u32 port_status;
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ehci = hcd_to_ehci(bus_to_hcd(class_get_devdata(class_dev)));
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new_owner = PORT_OWNER; /* Owned by companion */
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if (sscanf(buf, "%d", &portnum) != 1)
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return -EINVAL;
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if (portnum < 0) {
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portnum = - portnum;
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new_owner = 0; /* Owned by EHCI */
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}
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if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
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return -ENOENT;
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status_reg = &ehci->regs->port_status[--portnum];
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if (new_owner)
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set_bit(portnum, &ehci->companion_ports);
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else
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clear_bit(portnum, &ehci->companion_ports);
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/*
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* The controller won't set the OWNER bit if the port is
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* enabled, so this loop will sometimes require at least two
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* iterations: one to disable the port and one to set OWNER.
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*/
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for (try = 4; try > 0; --try) {
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spin_lock_irq(&ehci->lock);
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port_status = ehci_readl(ehci, status_reg);
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if ((port_status & PORT_OWNER) == new_owner
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|| (port_status & (PORT_OWNER | PORT_CONNECT))
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== 0)
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try = 0;
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else {
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port_status ^= PORT_OWNER;
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port_status &= ~(PORT_PE | PORT_RWC_BITS);
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ehci_writel(ehci, port_status, status_reg);
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}
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spin_unlock_irq(&ehci->lock);
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if (try > 1)
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msleep(5);
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}
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return count;
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}
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static CLASS_DEVICE_ATTR(companion, 0644, show_companion, store_companion);
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static inline void create_companion_file(struct ehci_hcd *ehci)
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{
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int i;
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/* with integrated TT there is no companion! */
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if (!ehci_is_TDI(ehci))
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i = class_device_create_file(ehci_to_hcd(ehci)->self.class_dev,
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&class_device_attr_companion);
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}
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static inline void remove_companion_file(struct ehci_hcd *ehci)
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{
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/* with integrated TT there is no companion! */
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if (!ehci_is_TDI(ehci))
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class_device_remove_file(ehci_to_hcd(ehci)->self.class_dev,
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&class_device_attr_companion);
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}
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/*-------------------------------------------------------------------------*/
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static int check_reset_complete (
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struct ehci_hcd *ehci,
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int index,
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u32 __iomem *status_reg,
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int port_status
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) {
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if (!(port_status & PORT_CONNECT)) {
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ehci->reset_done [index] = 0;
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return port_status;
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}
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/* if reset finished and it's still not enabled -- handoff */
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if (!(port_status & PORT_PE)) {
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/* with integrated TT, there's nobody to hand it to! */
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if (ehci_is_TDI(ehci)) {
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ehci_dbg (ehci,
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"Failed to enable port %d on root hub TT\n",
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index+1);
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return port_status;
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}
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ehci_dbg (ehci, "port %d full speed --> companion\n",
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index + 1);
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// what happens if HCS_N_CC(params) == 0 ?
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port_status |= PORT_OWNER;
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port_status &= ~PORT_RWC_BITS;
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ehci_writel(ehci, port_status, status_reg);
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} else
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ehci_dbg (ehci, "port %d high speed\n", index + 1);
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return port_status;
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}
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/*-------------------------------------------------------------------------*/
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/* build "status change" packet (one or two bytes) from HC registers */
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static int
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ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
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{
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struct ehci_hcd *ehci = hcd_to_ehci (hcd);
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u32 temp, status = 0;
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u32 mask;
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int ports, i, retval = 1;
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unsigned long flags;
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/* if !USB_SUSPEND, root hub timers won't get shut down ... */
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if (!HC_IS_RUNNING(hcd->state))
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return 0;
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/* init status to no-changes */
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buf [0] = 0;
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ports = HCS_N_PORTS (ehci->hcs_params);
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if (ports > 7) {
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buf [1] = 0;
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retval++;
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}
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/* Some boards (mostly VIA?) report bogus overcurrent indications,
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* causing massive log spam unless we completely ignore them. It
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* may be relevant that VIA VT8235 controllers, where PORT_POWER is
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* always set, seem to clear PORT_OCC and PORT_CSC when writing to
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* PORT_POWER; that's surprising, but maybe within-spec.
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*/
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if (!ignore_oc)
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mask = PORT_CSC | PORT_PEC | PORT_OCC;
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else
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mask = PORT_CSC | PORT_PEC;
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// PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
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/* no hub change reports (bit 0) for now (power, ...) */
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/* port N changes (bit N)? */
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spin_lock_irqsave (&ehci->lock, flags);
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for (i = 0; i < ports; i++) {
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temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
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/*
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* Return status information even for ports with OWNER set.
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* Otherwise khubd wouldn't see the disconnect event when a
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* high-speed device is switched over to the companion
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* controller by the user.
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*/
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if (!(temp & PORT_CONNECT))
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ehci->reset_done [i] = 0;
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if ((temp & mask) != 0
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|| ((temp & PORT_RESUME) != 0
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&& time_after_eq(jiffies,
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ehci->reset_done[i]))) {
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if (i < 7)
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buf [0] |= 1 << (i + 1);
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else
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buf [1] |= 1 << (i - 7);
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status = STS_PCD;
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}
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}
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/* FIXME autosuspend idle root hubs */
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spin_unlock_irqrestore (&ehci->lock, flags);
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return status ? retval : 0;
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}
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/*-------------------------------------------------------------------------*/
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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 = (__force __u16)cpu_to_le16 (temp);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
|
|
|
|
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 temp, 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);
|
|
|
|
/*
|
|
* 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_FEAT_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) {
|
|
if ((temp & PORT_PE) == 0)
|
|
goto error;
|
|
/* 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:
|
|
/* we auto-clear this feature */
|
|
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:
|
|
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 |= 1 << USB_PORT_FEAT_C_CONNECTION;
|
|
if (temp & PORT_PEC)
|
|
status |= 1 << USB_PORT_FEAT_C_ENABLE;
|
|
|
|
if ((temp & PORT_OCC) && !ignore_oc){
|
|
status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
|
|
|
|
/*
|
|
* 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])) {
|
|
status |= 1 << USB_PORT_FEAT_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 |= 1 << USB_PORT_FEAT_C_RESET;
|
|
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, 750);
|
|
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));
|
|
}
|
|
|
|
/* 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 |= 1 << USB_PORT_FEAT_CONNECTION;
|
|
// status may be from integrated TT
|
|
status |= ehci_port_speed(ehci, temp);
|
|
}
|
|
if (temp & PORT_PE)
|
|
status |= 1 << USB_PORT_FEAT_ENABLE;
|
|
if (temp & (PORT_SUSPEND|PORT_RESUME))
|
|
status |= 1 << USB_PORT_FEAT_SUSPEND;
|
|
if (temp & PORT_OC)
|
|
status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
|
|
if (temp & PORT_RESET)
|
|
status |= 1 << USB_PORT_FEAT_RESET;
|
|
if (temp & PORT_POWER)
|
|
status |= 1 << USB_PORT_FEAT_POWER;
|
|
|
|
#ifndef EHCI_VERBOSE_DEBUG
|
|
if (status & ~0xffff) /* only if wPortChange is interesting */
|
|
#endif
|
|
dbg_port (ehci, "GetStatus", wIndex + 1, temp);
|
|
put_unaligned(cpu_to_le32 (status), (__le32 *) 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 (!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;
|
|
if (device_may_wakeup(&hcd->self.root_hub->dev))
|
|
temp |= PORT_WAKE_BITS;
|
|
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
|
|
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;
|
|
}
|
|
spin_unlock_irqrestore (&ehci->lock, flags);
|
|
return retval;
|
|
}
|