d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

For USS820 driver we need to manually reset TX FIFO at each SETUP transaction

Browse Source 
because the chip doesn't do this by itself.

Submitted by:	Hans Petter Selasky
This commit is contained in:
Andrew Thompson 2010-03-11 21:49:00 +00:00
parent 6a268418dc
commit 6703f98c02
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=205034
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sys/dev/usb/controller/uss820dci.c
View File

@ -333,6 +333,14 @@ uss820dci_setup_rx(struct uss820dci_td *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: