zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/usb/host/ehci-hub.c b/ap/os/linux/linux-3.4.x/drivers/usb/host/ehci-hub.c
new file mode 100644
index 0000000..3cb52a9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/usb/host/ehci-hub.c
@@ -0,0 +1,1104 @@
+/*
+ * Copyright (C) 2001-2004 by David Brownell
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* this file is part of ehci-hcd.c */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * EHCI Root Hub ... the nonsharable stuff
+ *
+ * Registers don't need cpu_to_le32, that happens transparently
+ */
+
+/*-------------------------------------------------------------------------*/
+#include <linux/usb/otg.h>
+
+#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
+
+#ifdef CONFIG_PM
+
+static int ehci_hub_control(
+ struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue,
+ u16 wIndex,
+ char *buf,
+ u16 wLength
+);
+
+/* After a power loss, ports that were owned by the companion must be
+ * reset so that the companion can still own them.
+ */
+static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
+{
+ u32 __iomem *reg;
+ u32 status;
+ int port;
+ __le32 buf;
+ struct usb_hcd *hcd = ehci_to_hcd(ehci);
+
+ if (!ehci->owned_ports)
+ return;
+
+ /* Give the connections some time to appear */
+ msleep(20);
+
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ if (test_bit(port, &ehci->owned_ports)) {
+ reg = &ehci->regs->port_status[port];
+ status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
+
+ /* Port already owned by companion? */
+ if (status & PORT_OWNER)
+ clear_bit(port, &ehci->owned_ports);
+ else if (test_bit(port, &ehci->companion_ports))
+ ehci_writel(ehci, status & ~PORT_PE, reg);
+ else
+ ehci_hub_control(hcd, SetPortFeature,
+ USB_PORT_FEAT_RESET, port + 1,
+ NULL, 0);
+ }
+ }
+
+ if (!ehci->owned_ports)
+ return;
+ msleep(90); /* Wait for resets to complete */
+
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ if (test_bit(port, &ehci->owned_ports)) {
+ ehci_hub_control(hcd, GetPortStatus,
+ 0, port + 1,
+ (char *) &buf, sizeof(buf));
+
+ /* The companion should now own the port,
+ * but if something went wrong the port must not
+ * remain enabled.
+ */
+ reg = &ehci->regs->port_status[port];
+ status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
+ if (status & PORT_OWNER)
+ ehci_writel(ehci, status | PORT_CSC, reg);
+ else {
+ ehci_dbg(ehci, "failed handover port %d: %x\n",
+ port + 1, status);
+ ehci_writel(ehci, status & ~PORT_PE, reg);
+ }
+ }
+ }
+
+ ehci->owned_ports = 0;
+}
+
+static int __maybe_unused ehci_port_change(struct ehci_hcd *ehci)
+{
+ int i = HCS_N_PORTS(ehci->hcs_params);
+
+ /* First check if the controller indicates a change event */
+
+ if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
+ return 1;
+
+ /*
+ * Not all controllers appear to update this while going from D3 to D0,
+ * so check the individual port status registers as well
+ */
+
+ while (i--)
+ if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
+ return 1;
+
+ return 0;
+}
+
+static __maybe_unused void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
+ bool suspending, bool do_wakeup)
+{
+ int port;
+ u32 temp;
+ unsigned long flags;
+
+ /* If remote wakeup is enabled for the root hub but disabled
+ * for the controller, we must adjust all the port wakeup flags
+ * when the controller is suspended or resumed. In all other
+ * cases they don't need to be changed.
+ */
+ if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
+ return;
+
+ spin_lock_irqsave(&ehci->lock, flags);
+
+ /* clear phy low-power mode before changing wakeup flags */
+ if (ehci->has_hostpc) {
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ u32 __iomem *hostpc_reg;
+
+ hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
+ + HOSTPC0 + 4 * port);
+ temp = ehci_readl(ehci, hostpc_reg);
+ ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
+ }
+ spin_unlock_irqrestore(&ehci->lock, flags);
+ msleep(5);
+ spin_lock_irqsave(&ehci->lock, flags);
+ }
+
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ u32 __iomem *reg = &ehci->regs->port_status[port];
+ u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
+ u32 t2 = t1 & ~PORT_WAKE_BITS;
+
+ /* If we are suspending the controller, clear the flags.
+ * If we are resuming the controller, set the wakeup flags.
+ */
+ if (!suspending) {
+ if (t1 & PORT_CONNECT)
+ t2 |= PORT_WKOC_E | PORT_WKDISC_E;
+ else
+ t2 |= PORT_WKOC_E | PORT_WKCONN_E;
+ }
+ ehci_vdbg(ehci, "port %d, %08x -> %08x\n",
+ port + 1, t1, t2);
+ ehci_writel(ehci, t2, reg);
+ }
+
+ /* enter phy low-power mode again */
+ if (ehci->has_hostpc) {
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ u32 __iomem *hostpc_reg;
+
+ hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
+ + HOSTPC0 + 4 * port);
+ temp = ehci_readl(ehci, hostpc_reg);
+ ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
+ }
+ }
+
+ /* Does the root hub have a port wakeup pending? */
+ if (!suspending && ehci_port_change(ehci))
+ usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
+
+ spin_unlock_irqrestore(&ehci->lock, flags);
+}
+
+static int ehci_bus_suspend (struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci (hcd);
+ int port;
+ int mask;
+ int changed;
+
+ ehci_dbg(ehci, "suspend root hub\n");
+
+ if (time_before (jiffies, ehci->next_statechange))
+ msleep(5);
+ del_timer_sync(&ehci->watchdog);
+ del_timer_sync(&ehci->iaa_watchdog);
+
+ spin_lock_irq (&ehci->lock);
+
+ /* Once the controller is stopped, port resumes that are already
+ * in progress won't complete. Hence if remote wakeup is enabled
+ * for the root hub and any ports are in the middle of a resume or
+ * remote wakeup, we must fail the suspend.
+ */
+ if (hcd->self.root_hub->do_remote_wakeup) {
+ if (ehci->resuming_ports) {
+ spin_unlock_irq(&ehci->lock);
+ ehci_dbg(ehci, "suspend failed because a port is resuming\n");
+ return -EBUSY;
+ }
+ }
+
+ /* stop schedules, clean any completed work */
+ if (ehci->rh_state == EHCI_RH_RUNNING)
+ ehci_quiesce (ehci);
+ ehci->command = ehci_readl(ehci, &ehci->regs->command);
+ ehci_work(ehci);
+
+ /* Unlike other USB host controller types, EHCI doesn't have
+ * any notion of "global" or bus-wide suspend. The driver has
+ * to manually suspend all the active unsuspended ports, and
+ * then manually resume them in the bus_resume() routine.
+ */
+ ehci->bus_suspended = 0;
+ ehci->owned_ports = 0;
+ changed = 0;
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ u32 __iomem *reg = &ehci->regs->port_status [port];
+ u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
+ u32 t2 = t1 & ~PORT_WAKE_BITS;
+
+ /* keep track of which ports we suspend */
+ if (t1 & PORT_OWNER)
+ set_bit(port, &ehci->owned_ports);
+ else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
+ t2 |= PORT_SUSPEND;
+ set_bit(port, &ehci->bus_suspended);
+ }
+
+ /* enable remote wakeup on all ports, if told to do so */
+ if (hcd->self.root_hub->do_remote_wakeup) {
+ /* only enable appropriate wake bits, otherwise the
+ * hardware can not go phy low power mode. If a race
+ * condition happens here(connection change during bits
+ * set), the port change detection will finally fix it.
+ */
+ if (t1 & PORT_CONNECT)
+ t2 |= PORT_WKOC_E | PORT_WKDISC_E;
+ else
+ t2 |= PORT_WKOC_E | PORT_WKCONN_E;
+ }
+
+ if (t1 != t2) {
+ ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
+ port + 1, t1, t2);
+ ehci_writel(ehci, t2, reg);
+ changed = 1;
+ }
+ }
+
+ if (changed && ehci->has_hostpc) {
+ spin_unlock_irq(&ehci->lock);
+ msleep(5); /* 5 ms for HCD to enter low-power mode */
+ spin_lock_irq(&ehci->lock);
+
+ port = HCS_N_PORTS(ehci->hcs_params);
+ while (port--) {
+ u32 __iomem *hostpc_reg;
+ u32 t3;
+
+ hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
+ + HOSTPC0 + 4 * port);
+ t3 = ehci_readl(ehci, hostpc_reg);
+ ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
+ t3 = ehci_readl(ehci, hostpc_reg);
+ ehci_dbg(ehci, "Port %d phy low-power mode %s\n",
+ port, (t3 & HOSTPC_PHCD) ?
+ "succeeded" : "failed");
+ }
+ }
+
+ /* Apparently some devices need a >= 1-uframe delay here */
+ if (ehci->bus_suspended)
+ udelay(150);
+
+ /* turn off now-idle HC */
+ ehci_halt (ehci);
+ ehci->rh_state = EHCI_RH_SUSPENDED;
+
+ if (ehci->reclaim)
+ end_unlink_async(ehci);
+
+ /* allow remote wakeup */
+ mask = INTR_MASK;
+ if (!hcd->self.root_hub->do_remote_wakeup)
+ mask &= ~STS_PCD;
+ ehci_writel(ehci, mask, &ehci->regs->intr_enable);
+ ehci_readl(ehci, &ehci->regs->intr_enable);
+
+ ehci->next_statechange = jiffies + msecs_to_jiffies(10);
+ spin_unlock_irq (&ehci->lock);
+
+ /* ehci_work() may have re-enabled the watchdog timer, which we do not
+ * want, and so we must delete any pending watchdog timer events.
+ */
+ del_timer_sync(&ehci->watchdog);
+ return 0;
+}
+
+
+/* caller has locked the root hub, and should reset/reinit on error */
+static int ehci_bus_resume (struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci (hcd);
+ u32 temp;
+ u32 power_okay;
+ int i;
+ unsigned long resume_needed = 0;
+
+ if (time_before (jiffies, ehci->next_statechange))
+ msleep(5);
+ spin_lock_irq (&ehci->lock);
+ if (!HCD_HW_ACCESSIBLE(hcd)) {
+ spin_unlock_irq(&ehci->lock);
+ return -ESHUTDOWN;
+ }
+
+ if (unlikely(ehci->debug)) {
+ if (!dbgp_reset_prep())
+ ehci->debug = NULL;
+ else
+ dbgp_external_startup();
+ }
+
+ /* Ideally and we've got a real resume here, and no port's power
+ * was lost. (For PCI, that means Vaux was maintained.) But we
+ * could instead be restoring a swsusp snapshot -- so that BIOS was
+ * the last user of the controller, not reset/pm hardware keeping
+ * state we gave to it.
+ */
+ power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
+ ehci_dbg(ehci, "resume root hub%s\n",
+ power_okay ? "" : " after power loss");
+
+ /* at least some APM implementations will try to deliver
+ * IRQs right away, so delay them until we're ready.
+ */
+ ehci_writel(ehci, 0, &ehci->regs->intr_enable);
+
+ /* re-init operational registers */
+ ehci_writel(ehci, 0, &ehci->regs->segment);
+ ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
+ ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
+
+ /* restore CMD_RUN, framelist size, and irq threshold */
+ ehci_writel(ehci, ehci->command, &ehci->regs->command);
+ ehci->rh_state = EHCI_RH_RUNNING;
+
+ /* Some controller/firmware combinations need a delay during which
+ * they set up the port statuses. See Bugzilla #8190. */
+ spin_unlock_irq(&ehci->lock);
+ msleep(8);
+ spin_lock_irq(&ehci->lock);
+
+ /* clear phy low-power mode before resume */
+ if (ehci->bus_suspended && ehci->has_hostpc) {
+ i = HCS_N_PORTS(ehci->hcs_params);
+ while (i--) {
+ if (test_bit(i, &ehci->bus_suspended)) {
+ u32 __iomem *hostpc_reg;
+
+ hostpc_reg = (u32 __iomem *)((u8 *) ehci->regs
+ + HOSTPC0 + 4 * i);
+ temp = ehci_readl(ehci, hostpc_reg);
+ ehci_writel(ehci, temp & ~HOSTPC_PHCD,
+ hostpc_reg);
+ }
+ }
+ spin_unlock_irq(&ehci->lock);
+ msleep(5);
+ spin_lock_irq(&ehci->lock);
+ }
+
+ /* manually resume the ports we suspended during bus_suspend() */
+ i = HCS_N_PORTS (ehci->hcs_params);
+ while (i--) {
+ temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
+ temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
+ if (test_bit(i, &ehci->bus_suspended) &&
+ (temp & PORT_SUSPEND)) {
+ temp |= PORT_RESUME;
+ set_bit(i, &resume_needed);
+ }
+ ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
+ }
+
+ /* msleep for 20ms only if code is trying to resume port */
+ if (resume_needed) {
+ spin_unlock_irq(&ehci->lock);
+ msleep(20);
+ spin_lock_irq(&ehci->lock);
+ }
+
+ i = HCS_N_PORTS (ehci->hcs_params);
+ while (i--) {
+ temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
+ if (test_bit(i, &resume_needed)) {
+ temp &= ~(PORT_RWC_BITS | PORT_RESUME);
+ ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
+ ehci_vdbg (ehci, "resumed port %d\n", i + 1);
+ }
+ }
+ (void) ehci_readl(ehci, &ehci->regs->command);
+
+ /* maybe re-activate the schedule(s) */
+ temp = 0;
+ if (ehci->async->qh_next.qh)
+ temp |= CMD_ASE;
+ if (ehci->periodic_sched)
+ temp |= CMD_PSE;
+ if (temp) {
+ ehci->command |= temp;
+ ehci_writel(ehci, ehci->command, &ehci->regs->command);
+ }
+
+ ehci->next_statechange = jiffies + msecs_to_jiffies(5);
+
+ /* Now we can safely re-enable irqs */
+ ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
+
+ spin_unlock_irq (&ehci->lock);
+ ehci_handover_companion_ports(ehci);
+ return 0;
+}
+
+#else
+
+#define ehci_bus_suspend NULL
+#define ehci_bus_resume NULL
+
+#endif /* CONFIG_PM */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Sets the owner of a port
+ */
+static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
+{
+ u32 __iomem *status_reg;
+ u32 port_status;
+ int try;
+
+ status_reg = &ehci->regs->port_status[portnum];
+
+ /*
+ * The controller won't set the OWNER bit if the port is
+ * enabled, so this loop will sometimes require at least two
+ * iterations: one to disable the port and one to set OWNER.
+ */
+ for (try = 4; try > 0; --try) {
+ spin_lock_irq(&ehci->lock);
+ port_status = ehci_readl(ehci, status_reg);
+ if ((port_status & PORT_OWNER) == new_owner
+ || (port_status & (PORT_OWNER | PORT_CONNECT))
+ == 0)
+ try = 0;
+ else {
+ port_status ^= PORT_OWNER;
+ port_status &= ~(PORT_PE | PORT_RWC_BITS);
+ ehci_writel(ehci, port_status, status_reg);
+ }
+ spin_unlock_irq(&ehci->lock);
+ if (try > 1)
+ msleep(5);
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int check_reset_complete (
+ struct ehci_hcd *ehci,
+ int index,
+ u32 __iomem *status_reg,
+ int port_status
+) {
+ if (!(port_status & PORT_CONNECT))
+ return port_status;
+
+ /* if reset finished and it's still not enabled -- handoff */
+ if (!(port_status & PORT_PE)) {
+
+ /* with integrated TT, there's nobody to hand it to! */
+ if (ehci_is_TDI(ehci)) {
+ ehci_dbg (ehci,
+ "Failed to enable port %d on root hub TT\n",
+ index+1);
+ return port_status;
+ }
+
+ ehci_dbg (ehci, "port %d full speed --> companion\n",
+ index + 1);
+
+ // what happens if HCS_N_CC(params) == 0 ?
+ port_status |= PORT_OWNER;
+ port_status &= ~PORT_RWC_BITS;
+ ehci_writel(ehci, port_status, status_reg);
+
+ /* ensure 440EPX ohci controller state is operational */
+ if (ehci->has_amcc_usb23)
+ set_ohci_hcfs(ehci, 1);
+ } else {
+ ehci_dbg (ehci, "port %d high speed\n", index + 1);
+ /* ensure 440EPx ohci controller state is suspended */
+ if (ehci->has_amcc_usb23)
+ set_ohci_hcfs(ehci, 0);
+ }
+
+ return port_status;
+}
+
+/*-------------------------------------------------------------------------*/
+
+
+/* build "status change" packet (one or two bytes) from HC registers */
+
+static int
+ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci (hcd);
+ u32 temp, status;
+ u32 mask;
+ int ports, i, retval = 1;
+ unsigned long flags;
+ u32 ppcd = 0;
+
+ /* init status to no-changes */
+ buf [0] = 0;
+ ports = HCS_N_PORTS (ehci->hcs_params);
+ if (ports > 7) {
+ buf [1] = 0;
+ retval++;
+ }
+
+ /* Inform the core about resumes-in-progress by returning
+ * a non-zero value even if there are no status changes.
+ */
+ status = ehci->resuming_ports;
+
+ /* Some boards (mostly VIA?) report bogus overcurrent indications,
+ * causing massive log spam unless we completely ignore them. It
+ * may be relevant that VIA VT8235 controllers, where PORT_POWER is
+ * always set, seem to clear PORT_OCC and PORT_CSC when writing to
+ * PORT_POWER; that's surprising, but maybe within-spec.
+ */
+ if (!ignore_oc)
+ mask = PORT_CSC | PORT_PEC | PORT_OCC;
+ else
+ mask = PORT_CSC | PORT_PEC;
+ // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
+
+ /* no hub change reports (bit 0) for now (power, ...) */
+
+ /* port N changes (bit N)? */
+ spin_lock_irqsave (&ehci->lock, flags);
+
+ /* get per-port change detect bits */
+ if (ehci->has_ppcd)
+ ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
+
+ for (i = 0; i < ports; i++) {
+ /* leverage per-port change bits feature */
+ if (ehci->has_ppcd && !(ppcd & (1 << i)))
+ continue;
+ temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
+
+ /*
+ * Return status information even for ports with OWNER set.
+ * Otherwise khubd wouldn't see the disconnect event when a
+ * high-speed device is switched over to the companion
+ * controller by the user.
+ */
+
+ if ((temp & mask) != 0 || test_bit(i, &ehci->port_c_suspend)
+ || (ehci->reset_done[i] && time_after_eq(
+ jiffies, ehci->reset_done[i]))) {
+ if (i < 7)
+ buf [0] |= 1 << (i + 1);
+ else
+ buf [1] |= 1 << (i - 7);
+ status = STS_PCD;
+ }
+ }
+
+ /* If a resume is in progress, make sure it can finish */
+ if (ehci->resuming_ports)
+ mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
+
+ spin_unlock_irqrestore (&ehci->lock, flags);
+ return status ? retval : 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void
+ehci_hub_descriptor (
+ struct ehci_hcd *ehci,
+ struct usb_hub_descriptor *desc
+) {
+ int ports = HCS_N_PORTS (ehci->hcs_params);
+ u16 temp;
+
+ desc->bDescriptorType = 0x29;
+ desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
+ desc->bHubContrCurrent = 0;
+
+ desc->bNbrPorts = ports;
+ temp = 1 + (ports / 8);
+ desc->bDescLength = 7 + 2 * temp;
+
+ /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
+ memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
+ memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
+
+ temp = 0x0008; /* per-port overcurrent reporting */
+ if (HCS_PPC (ehci->hcs_params))
+ temp |= 0x0001; /* per-port power control */
+ else
+ temp |= 0x0002; /* no power switching */
+#if 0
+// re-enable when we support USB_PORT_FEAT_INDICATOR below.
+ if (HCS_INDICATOR (ehci->hcs_params))
+ temp |= 0x0080; /* per-port indicators (LEDs) */
+#endif
+ desc->wHubCharacteristics = cpu_to_le16(temp);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int ehci_hub_control (
+ struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue,
+ u16 wIndex,
+ char *buf,
+ u16 wLength
+) {
+ struct ehci_hcd *ehci = hcd_to_ehci (hcd);
+ int ports = HCS_N_PORTS (ehci->hcs_params);
+ u32 __iomem *status_reg = &ehci->regs->port_status[
+ (wIndex & 0xff) - 1];
+ u32 __iomem *hostpc_reg = 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;
+#ifdef CONFIG_USB_OTG
+ if ((hcd->self.otg_port == (wIndex + 1))
+ && hcd->self.b_hnp_enable) {
+ otg_start_hnp(ehci->transceiver->otg);
+ break;
+ }
+#endif
+ if (!(temp & PORT_SUSPEND))
+ break;
+ if ((temp & PORT_PE) == 0)
+ goto error;
+
+ /* clear phy low-power mode before resume */
+ if (hostpc_reg) {
+ temp1 = ehci_readl(ehci, hostpc_reg);
+ ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
+ hostpc_reg);
+ spin_unlock_irqrestore(&ehci->lock, flags);
+ msleep(5);/* wait to leave low-power mode */
+ spin_lock_irqsave(&ehci->lock, flags);
+ }
+ /* resume signaling for 20 msec */
+ temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
+ ehci_writel(ehci, temp | PORT_RESUME, status_reg);
+ ehci->reset_done[wIndex] = jiffies
+ + msecs_to_jiffies(20);
+ break;
+ case USB_PORT_FEAT_C_SUSPEND:
+ clear_bit(wIndex, &ehci->port_c_suspend);
+ break;
+ case USB_PORT_FEAT_POWER:
+ if (HCS_PPC (ehci->hcs_params))
+ ehci_writel(ehci,
+ temp & ~(PORT_RWC_BITS | PORT_POWER),
+ status_reg);
+ break;
+ case USB_PORT_FEAT_C_CONNECTION:
+ if (ehci->has_lpm) {
+ /* clear PORTSC bits on disconnect */
+ temp &= ~PORT_LPM;
+ temp &= ~PORT_DEV_ADDR;
+ }
+ ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
+ status_reg);
+ break;
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
+ status_reg);
+ break;
+ case USB_PORT_FEAT_C_RESET:
+ /* GetPortStatus clears reset */
+ break;
+ default:
+ goto error;
+ }
+ ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
+ break;
+ case GetHubDescriptor:
+ ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
+ buf);
+ break;
+ case GetHubStatus:
+ /* no hub-wide feature/status flags */
+ memset (buf, 0, 4);
+ //cpu_to_le32s ((u32 *) buf);
+ break;
+ case GetPortStatus:
+ if (!wIndex || wIndex > ports)
+ goto error;
+ wIndex--;
+ status = 0;
+ temp = ehci_readl(ehci, status_reg);
+
+ // wPortChange bits
+ if (temp & PORT_CSC)
+ status |= USB_PORT_STAT_C_CONNECTION << 16;
+ if (temp & PORT_PEC)
+ status |= USB_PORT_STAT_C_ENABLE << 16;
+
+ if ((temp & PORT_OCC) && !ignore_oc){
+ status |= USB_PORT_STAT_C_OVERCURRENT << 16;
+
+ /*
+ * Hubs should disable port power on over-current.
+ * However, not all EHCI implementations do this
+ * automatically, even if they _do_ support per-port
+ * power switching; they're allowed to just limit the
+ * current. khubd will turn the power back on.
+ */
+ if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
+ ehci_writel(ehci,
+ temp & ~(PORT_RWC_BITS | PORT_POWER),
+ status_reg);
+ temp = ehci_readl(ehci, status_reg);
+ }
+ }
+
+ /* whoever resumes must GetPortStatus to complete it!! */
+ if (temp & PORT_RESUME) {
+
+ /* Remote Wakeup received? */
+ if (!ehci->reset_done[wIndex]) {
+ /* resume signaling for 20 msec */
+ ehci->reset_done[wIndex] = jiffies
+ + msecs_to_jiffies(20);
+ /* check the port again */
+ mod_timer(&ehci_to_hcd(ehci)->rh_timer,
+ ehci->reset_done[wIndex]);
+ }
+
+ /* resume completed? */
+ else if (time_after_eq(jiffies,
+ ehci->reset_done[wIndex])) {
+ clear_bit(wIndex, &ehci->suspended_ports);
+ set_bit(wIndex, &ehci->port_c_suspend);
+ ehci->reset_done[wIndex] = 0;
+
+ /* stop resume signaling */
+ temp = ehci_readl(ehci, status_reg);
+ ehci_writel(ehci,
+ temp & ~(PORT_RWC_BITS | PORT_RESUME),
+ status_reg);
+ clear_bit(wIndex, &ehci->resuming_ports);
+ retval = handshake(ehci, status_reg,
+ PORT_RESUME, 0, 2000 /* 2msec */);
+ if (retval != 0) {
+ ehci_err(ehci,
+ "port %d resume error %d\n",
+ wIndex + 1, retval);
+ goto error;
+ }
+ temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
+ }
+ }
+
+ /* whoever resets must GetPortStatus to complete it!! */
+ if ((temp & PORT_RESET)
+ && time_after_eq(jiffies,
+ ehci->reset_done[wIndex])) {
+ status |= USB_PORT_STAT_C_RESET << 16;
+ ehci->reset_done [wIndex] = 0;
+ clear_bit(wIndex, &ehci->resuming_ports);
+
+ /* force reset to complete */
+ ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
+ status_reg);
+ /* REVISIT: some hardware needs 550+ usec to clear
+ * this bit; seems too long to spin routinely...
+ */
+ retval = handshake(ehci, status_reg,
+ PORT_RESET, 0, 1000);
+ if (retval != 0) {
+ ehci_err (ehci, "port %d reset error %d\n",
+ wIndex + 1, retval);
+ goto error;
+ }
+
+ /* see what we found out */
+ temp = check_reset_complete (ehci, wIndex, status_reg,
+ ehci_readl(ehci, status_reg));
+ }
+
+ if (!(temp & (PORT_RESUME|PORT_RESET))) {
+ ehci->reset_done[wIndex] = 0;
+ clear_bit(wIndex, &ehci->resuming_ports);
+ }
+
+ /* transfer dedicated ports to the companion hc */
+ if ((temp & PORT_CONNECT) &&
+ test_bit(wIndex, &ehci->companion_ports)) {
+ temp &= ~PORT_RWC_BITS;
+ temp |= PORT_OWNER;
+ ehci_writel(ehci, temp, status_reg);
+ ehci_dbg(ehci, "port %d --> companion\n", wIndex + 1);
+ temp = ehci_readl(ehci, status_reg);
+ }
+
+ /*
+ * Even if OWNER is set, there's no harm letting khubd
+ * see the wPortStatus values (they should all be 0 except
+ * for PORT_POWER anyway).
+ */
+
+ if (temp & PORT_CONNECT) {
+ status |= USB_PORT_STAT_CONNECTION;
+ // status may be from integrated TT
+ if (ehci->has_hostpc) {
+ temp1 = ehci_readl(ehci, hostpc_reg);
+ status |= ehci_port_speed(ehci, temp1);
+ } else
+ status |= ehci_port_speed(ehci, temp);
+ }
+ if (temp & PORT_PE)
+ status |= USB_PORT_STAT_ENABLE;
+
+ /* maybe the port was unsuspended without our knowledge */
+ if (temp & (PORT_SUSPEND|PORT_RESUME)) {
+ status |= USB_PORT_STAT_SUSPEND;
+ } else if (test_bit(wIndex, &ehci->suspended_ports)) {
+ clear_bit(wIndex, &ehci->suspended_ports);
+ clear_bit(wIndex, &ehci->resuming_ports);
+ ehci->reset_done[wIndex] = 0;
+ if (temp & PORT_PE)
+ set_bit(wIndex, &ehci->port_c_suspend);
+ }
+
+ if (temp & PORT_OC)
+ status |= USB_PORT_STAT_OVERCURRENT;
+ if (temp & PORT_RESET)
+ status |= USB_PORT_STAT_RESET;
+ if (temp & PORT_POWER)
+ status |= USB_PORT_STAT_POWER;
+ if (test_bit(wIndex, &ehci->port_c_suspend))
+ status |= USB_PORT_STAT_C_SUSPEND << 16;
+
+#ifndef VERBOSE_DEBUG
+ if (status & ~0xffff) /* only if wPortChange is interesting */
+#endif
+ dbg_port (ehci, "GetStatus", wIndex + 1, temp);
+ put_unaligned_le32(status, buf);
+ break;
+ case SetHubFeature:
+ switch (wValue) {
+ case C_HUB_LOCAL_POWER:
+ case C_HUB_OVER_CURRENT:
+ /* no hub-wide feature/status flags */
+ break;
+ default:
+ goto error;
+ }
+ break;
+ case SetPortFeature:
+ selector = wIndex >> 8;
+ wIndex &= 0xff;
+ if (unlikely(ehci->debug)) {
+ /* If the debug port is active any port
+ * feature requests should get denied */
+ if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
+ (readl(&ehci->debug->control) & DBGP_ENABLED)) {
+ retval = -ENODEV;
+ goto error_exit;
+ }
+ }
+ if (!wIndex || wIndex > ports)
+ goto error;
+ wIndex--;
+ temp = ehci_readl(ehci, status_reg);
+ if (temp & PORT_OWNER)
+ break;
+
+ temp &= ~PORT_RWC_BITS;
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ if (ehci->no_selective_suspend)
+ break;
+ if ((temp & PORT_PE) == 0
+ || (temp & PORT_RESET) != 0)
+ goto error;
+
+ /* 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);
+
+ /* Put all enabled ports into suspend */
+ while (ports--) {
+ u32 __iomem *sreg =
+ &ehci->regs->port_status[ports];
+
+ temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
+ if (temp & PORT_PE)
+ ehci_writel(ehci, temp | PORT_SUSPEND,
+ sreg);
+ }
+ ehci_halt(ehci);
+ temp = ehci_readl(ehci, status_reg);
+ temp |= selector << 16;
+ ehci_writel(ehci, temp, status_reg);
+ break;
+
+ default:
+ goto error;
+ }
+ ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
+ break;
+
+ default:
+error:
+ /* "stall" on error */
+ retval = -EPIPE;
+ }
+error_exit:
+ spin_unlock_irqrestore (&ehci->lock, flags);
+ return retval;
+}
+
+static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
+ int portnum)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+ if (ehci_is_TDI(ehci))
+ return;
+ set_owner(ehci, --portnum, PORT_OWNER);
+}
+
+static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
+ int portnum)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ u32 __iomem *reg;
+
+ if (ehci_is_TDI(ehci))
+ return 0;
+ reg = &ehci->regs->port_status[portnum - 1];
+ return ehci_readl(ehci, reg) & PORT_OWNER;
+}