/*-------------------------------------------------------------------------*/
+#ifdef CONFIG_USB_PERSIST
+
+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;
+}
+
+#else /* CONFIG_USB_PERSIST */
+
+static inline void ehci_handover_companion_ports(struct ehci_hcd *ehci)
+{ }
+
+#endif
+
#ifdef CONFIG_PM
static int ehci_bus_suspend (struct usb_hcd *hcd)
int port;
int mask;
+ ehci_dbg(ehci, "suspend root hub\n");
+
if (time_before (jiffies, ehci->next_statechange))
msleep(5);
* then manually resume them in the bus_resume() routine.
*/
ehci->bus_suspended = 0;
+ ehci->owned_ports = 0;
while (port--) {
u32 __iomem *reg = &ehci->regs->port_status [port];
u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
u32 t2 = t1;
/* keep track of which ports we suspend */
- if ((t1 & PORT_PE) && !(t1 & PORT_OWNER) &&
- !(t1 & PORT_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);
}
{
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
u32 temp;
+ u32 power_okay;
int i;
if (time_before (jiffies, ehci->next_statechange))
* the last user of the controller, not reset/pm hardware keeping
* state we gave to it.
*/
- temp = ehci_readl(ehci, &ehci->regs->intr_enable);
- ehci_dbg(ehci, "resume root hub%s\n", temp ? "" : " after power loss");
+ 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.
/* restore CMD_RUN, framelist size, and irq threshold */
ehci_writel(ehci, ehci->command, &ehci->regs->command);
+ /* Some controller/firmware combinations need a delay during which
+ * they set up the port statuses. See Bugzilla #8190. */
+ mdelay(8);
+
/* manually resume the ports we suspended during bus_suspend() */
i = HCS_N_PORTS (ehci->hcs_params);
while (i--) {
ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
spin_unlock_irq (&ehci->lock);
+
+ if (!power_okay)
+ ehci_handover_companion_ports(ehci);
return 0;
}
) {
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 - 1];
+ u32 __iomem *status_reg = &ehci->regs->port_status[
+ (wIndex & 0xff) - 1];
u32 temp, status;
unsigned long flags;
int retval = 0;
status |= 1 << USB_PORT_FEAT_C_CONNECTION;
if (temp & PORT_PEC)
status |= 1 << USB_PORT_FEAT_C_ENABLE;
- if ((temp & PORT_OCC) && !ignore_oc)
+
+ 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) {
if (status & ~0xffff) /* only if wPortChange is interesting */
#endif
dbg_port (ehci, "GetStatus", wIndex + 1, temp);
- // we "know" this alignment is good, caller used kmalloc()...
- *((__le32 *) buf) = cpu_to_le32 (status);
+ put_unaligned(cpu_to_le32 (status), (__le32 *) buf);
break;
case SetHubFeature:
switch (wValue) {
projects / linux-2.6-omap-h63xx.git / blobdiff