I had a bit of trouble getting USB host working on a PXA320 platform,
and the patch below fixes it for me. The trouble is that OCPM is set
after a reset, and the existing code didn't clear it since it only ORs
in bits it wants. The PXA3xx docs say that OCPM must be cleared. I put
in the code to clear NOCP when necessary while I was at it.
Without this fix, I got oodles of these messages:
hub 1-0:1.0: over-current change on port 1
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index e294d43..6b182be 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -177,9 +177,13 @@ static inline void pxa27x_setup_hc(struct
pxa27x_ohci *ohci,
if (inf->flags & NO_OC_PROTECTION)
uhcrhda |= UHCRHDA_NOCP;
+ else
+ uhcrhda &= ~UHCRHDA_NOCP;
if (inf->flags & OC_MODE_PERPORT)
uhcrhda |= UHCRHDA_OCPM;
+ else
+ uhcrhda &= ~UHCRHDA_OCPM;
if (inf->power_on_delay) {
uhcrhda &= ~UHCRHDA_POTPGT(0xff);
--
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