From bc72a919e037782f64e3ac45c91bc60408e57e85 Mon Sep 17 00:00:00 2001 From: Bryan Wu Date: Wed, 16 Dec 2009 22:04:01 -0500 Subject: [PATCH] usb: musb: change rxcsr register from write to read/modify/write 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 Signed-off-by: Cliff Cai Signed-off-by: Mike Frysinger Signed-off-by: Remy Bohmer --- drivers/usb/musb/musb_hcd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/musb/musb_hcd.c b/drivers/usb/musb/musb_hcd.c index 5481600509..adb8c38527 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)) { -- 2.39.5