aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host/ohci-hcd.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/host/ohci-hcd.c')
-rw-r--r--drivers/usb/host/ohci-hcd.c40
1 files changed, 27 insertions, 13 deletions
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 9be6b303e78..b28a9b60206 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -715,13 +715,6 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
return IRQ_NOTMINE;
}
- if (ints & OHCI_INTR_RHSC) {
- ohci_vdbg (ohci, "rhsc\n");
- ohci->next_statechange = jiffies + STATECHANGE_DELAY;
- ohci_writel (ohci, OHCI_INTR_RHSC, &regs->intrstatus);
- usb_hcd_poll_rh_status(hcd);
- }
-
if (ints & OHCI_INTR_UE) {
disable (ohci);
ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
@@ -731,9 +724,31 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
ohci_usb_reset (ohci);
}
- if (ints & OHCI_INTR_RD) {
- ohci_vdbg (ohci, "resume detect\n");
- ohci_writel (ohci, OHCI_INTR_RD, &regs->intrstatus);
+ if (ints & OHCI_INTR_RHSC) {
+ ohci_vdbg(ohci, "rhsc\n");
+ ohci->next_statechange = jiffies + STATECHANGE_DELAY;
+ ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
+ &regs->intrstatus);
+
+ /* NOTE: Vendors didn't always make the same implementation
+ * choices for RHSC. Many followed the spec; RHSC triggers
+ * on an edge, like setting and maybe clearing a port status
+ * change bit. With others it's level-triggered, active
+ * until khubd clears all the port status change bits. We'll
+ * always disable it here and rely on polling until khubd
+ * re-enables it.
+ */
+ ohci_writel(ohci, OHCI_INTR_RHSC, &regs->intrdisable);
+ usb_hcd_poll_rh_status(hcd);
+ }
+
+ /* For connect and disconnect events, we expect the controller
+ * to turn on RHSC along with RD. But for remote wakeup events
+ * this might not happen.
+ */
+ else if (ints & OHCI_INTR_RD) {
+ ohci_vdbg(ohci, "resume detect\n");
+ ohci_writel(ohci, OHCI_INTR_RD, &regs->intrstatus);
hcd->poll_rh = 1;
if (ohci->autostop) {
spin_lock (&ohci->lock);
@@ -930,7 +945,7 @@ MODULE_LICENSE ("GPL");
#include "ohci-ppc-soc.c"
#endif
-#if defined(CONFIG_ARCH_AT91RM9200) || defined(CONFIG_ARCH_AT91SAM9261)
+#ifdef CONFIG_ARCH_AT91
#include "ohci-at91.c"
#endif
@@ -947,8 +962,7 @@ MODULE_LICENSE ("GPL");
|| defined (CONFIG_ARCH_EP93XX) \
|| defined (CONFIG_SOC_AU1X00) \
|| defined (CONFIG_USB_OHCI_HCD_PPC_SOC) \
- || defined (CONFIG_ARCH_AT91RM9200) \
- || defined (CONFIG_ARCH_AT91SAM9261) \
+ || defined (CONFIG_ARCH_AT91) \
|| defined (CONFIG_ARCH_PNX4008) \
)
#error "missing bus glue for ohci-hcd"