From: Bryan Wu bryan.wu@analog.com
The RX Control/Status register has bits that we want to preserve, so don't just write out a single bit. Preserve the others bits in the process.
The original code posted to the u-boot list had this behavior, but looks like it was lost somewhere along the way to merging.
Signed-off-by: Bryan Wu bryan.wu@analog.com Signed-off-by: Cliff Cai cliff.cai@analog.com Signed-off-by: Mike Frysinger vapier@gentoo.org --- drivers/usb/musb/musb_hcd.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/musb/musb_hcd.c b/drivers/usb/musb/musb_hcd.c index 8d94aea..281fc70 100644 --- a/drivers/usb/musb/musb_hcd.c +++ b/drivers/usb/musb/musb_hcd.c @@ -604,7 +604,8 @@ int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, (len-txlen) : dev->epmaxpacketin[ep];
/* Set the ReqPkt bit */ - writew(MUSB_RXCSR_H_REQPKT, &musbr->rxcsr); + csr = readw(&musbr->rxcsr); + writew(csr | MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
/* Wait until the RxPktRdy bit is set */ if (!wait_until_rxep_ready(dev, MUSB_BULK_EP)) { @@ -775,7 +776,8 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe, (len-txlen) : dev->epmaxpacketin[ep];
/* Set the ReqPkt bit */ - writew(MUSB_RXCSR_H_REQPKT, &musbr->rxcsr); + csr = readw(&musbr->rxcsr); + writew(csr | MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
/* Wait until the RxPktRdy bit is set */ if (!wait_until_rxep_ready(dev, MUSB_INTR_EP)) {