Author: thompsa
Date: Thu Mar 11 21:49:00 2010
New Revision: 205034
URL: http://svn.freebsd.org/changeset/base/205034
Log:
For USS820 driver we need to manually reset TX FIFO at each SETUP transaction
because the chip doesn't do this by itself.
Submitted by: Hans Petter Selasky
Modified:
head/sys/dev/usb/controller/uss820dci.c
Modified: head/sys/dev/usb/controller/uss820dci.c
==============================================================================
--- head/sys/dev/usb/controller/uss820dci.c Thu Mar 11 21:48:10 2010
(r205033)
+++ head/sys/dev/usb/controller/uss820dci.c Thu Mar 11 21:49:00 2010
(r205034)
@@ -333,6 +333,14 @@ uss820dci_setup_rx(struct uss820dci_td *
} else {
sc->sc_dv_addr = 0xFF;
}
+
+ /* reset TX FIFO */
+ temp = USS820_READ_1(sc, USS820_TXCON);
+ temp |= USS820_TXCON_TXCLR;
+ USS820_WRITE_1(sc, USS820_TXCON, temp);
+ temp &= ~USS820_TXCON_TXCLR;
+ USS820_WRITE_1(sc, USS820_TXCON, temp);
+
return (0); /* complete */
setup_not_complete:
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