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path: root/drivers/usb/host/ehci-hub.c
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Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
-rw-r--r--drivers/usb/host/ehci-hub.c182
1 files changed, 138 insertions, 44 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index c7178bcde67a..e7d3d8def282 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -106,12 +106,75 @@ static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
ehci->owned_ports = 0;
}
+static void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
+ bool suspending)
+{
+ int port;
+ u32 temp;
+
+ /* 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 ||
+ device_may_wakeup(ehci_to_hcd(ehci)->self.controller))
+ return;
+
+ /* 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);
+ }
+ msleep(5);
+ }
+
+ 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);
+ }
+ }
+}
+
static int ehci_bus_suspend (struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
int port;
int mask;
- u32 __iomem *hostpc_reg = NULL;
+ int changed;
ehci_dbg(ehci, "suspend root hub\n");
@@ -155,15 +218,13 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
*/
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;
+ u32 t2 = t1 & ~PORT_WAKE_BITS;
- if (ehci->has_hostpc)
- hostpc_reg = (u32 __iomem *)((u8 *)ehci->regs
- + HOSTPC0 + 4 * (port & 0xff));
/* keep track of which ports we suspend */
if (t1 & PORT_OWNER)
set_bit(port, &ehci->owned_ports);
@@ -172,40 +233,45 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
set_bit(port, &ehci->bus_suspended);
}
- /* enable remote wakeup on all ports */
+ /* 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) {
+ if (t1 & PORT_CONNECT)
t2 |= PORT_WKOC_E | PORT_WKDISC_E;
- t2 &= ~PORT_WKCONN_E;
- } else {
+ else
t2 |= PORT_WKOC_E | PORT_WKCONN_E;
- t2 &= ~PORT_WKDISC_E;
- }
- } else
- t2 &= ~PORT_WAKE_BITS;
+ }
if (t1 != t2) {
ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
port + 1, t1, t2);
ehci_writel(ehci, t2, reg);
- if (hostpc_reg) {
- u32 t3;
+ changed = 1;
+ }
+ }
- spin_unlock_irq(&ehci->lock);
- msleep(5);/* 5ms for HCD enter low pwr mode */
- spin_lock_irq(&ehci->lock);
- 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 pwr mode %s\n",
+ 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");
- }
}
}
@@ -291,6 +357,25 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
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--) {
@@ -659,7 +744,7 @@ static int ehci_hub_control (
* 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).
+ * USB_PORT_STAT_C_CONNECTION).
*/
switch (wValue) {
@@ -675,16 +760,25 @@ static int ehci_hub_control (
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);
+ 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);
@@ -729,12 +823,12 @@ static int ehci_hub_control (
// wPortChange bits
if (temp & PORT_CSC)
- status |= 1 << USB_PORT_FEAT_C_CONNECTION;
+ status |= USB_PORT_STAT_C_CONNECTION << 16;
if (temp & PORT_PEC)
- status |= 1 << USB_PORT_FEAT_C_ENABLE;
+ status |= USB_PORT_STAT_C_ENABLE << 16;
if ((temp & PORT_OCC) && !ignore_oc){
- status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
+ status |= USB_PORT_STAT_C_OVERCURRENT << 16;
/*
* Hubs should disable port power on over-current.
@@ -791,7 +885,7 @@ static int ehci_hub_control (
if ((temp & PORT_RESET)
&& time_after_eq(jiffies,
ehci->reset_done[wIndex])) {
- status |= 1 << USB_PORT_FEAT_C_RESET;
+ status |= USB_PORT_STAT_C_RESET << 16;
ehci->reset_done [wIndex] = 0;
/* force reset to complete */
@@ -833,7 +927,7 @@ static int ehci_hub_control (
*/
if (temp & PORT_CONNECT) {
- status |= 1 << USB_PORT_FEAT_CONNECTION;
+ status |= USB_PORT_STAT_CONNECTION;
// status may be from integrated TT
if (ehci->has_hostpc) {
temp1 = ehci_readl(ehci, hostpc_reg);
@@ -842,11 +936,11 @@ static int ehci_hub_control (
status |= ehci_port_speed(ehci, temp);
}
if (temp & PORT_PE)
- status |= 1 << USB_PORT_FEAT_ENABLE;
+ status |= USB_PORT_STAT_ENABLE;
/* maybe the port was unsuspended without our knowledge */
if (temp & (PORT_SUSPEND|PORT_RESUME)) {
- status |= 1 << USB_PORT_FEAT_SUSPEND;
+ status |= USB_PORT_STAT_SUSPEND;
} else if (test_bit(wIndex, &ehci->suspended_ports)) {
clear_bit(wIndex, &ehci->suspended_ports);
ehci->reset_done[wIndex] = 0;
@@ -855,13 +949,13 @@ static int ehci_hub_control (
}
if (temp & PORT_OC)
- status |= 1 << USB_PORT_FEAT_OVER_CURRENT;
+ status |= USB_PORT_STAT_OVERCURRENT;
if (temp & PORT_RESET)
- status |= 1 << USB_PORT_FEAT_RESET;
+ status |= USB_PORT_STAT_RESET;
if (temp & PORT_POWER)
- status |= 1 << USB_PORT_FEAT_POWER;
+ status |= USB_PORT_STAT_POWER;
if (test_bit(wIndex, &ehci->port_c_suspend))
- status |= 1 << USB_PORT_FEAT_C_SUSPEND;
+ status |= USB_PORT_STAT_C_SUSPEND << 16;
#ifndef VERBOSE_DEBUG
if (status & ~0xffff) /* only if wPortChange is interesting */
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-30 19:56:26 +0300