Date: Mon, 10 Mar 2014 15:41:16 +0800 From: Kevin Lo <kevlo@FreeBSD.org> To: Alexey Dokuchaev <danfe@FreeBSD.org>, Rui Paulo <rpaulo@FreeBSD.org> Cc: "Julian H. Stacey" <jhs@berklix.com>, Alfred Perlstein <bright@mu.org>, "freebsd-current@freebsd.org bsd" <freebsd-current@freebsd.org> Subject: Re: urtwn driver for Edimax EW-7811U WLAN nano USB Adapter Message-ID: <531D6C9C.7010607@FreeBSD.org> In-Reply-To: <20140210122146.GA26853@FreeBSD.org> References: <201310081742.r98HfbBV055077@fire.js.berklix.net> <589BAB21-30E9-4750-A345-BE7AB1116F48@FreeBSD.org> <20140210122146.GA26853@FreeBSD.org>
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On 2014/02/10 20:21, Alexey Dokuchaev wrote: > On Tue, Oct 15, 2013 at 11:13:56PM -0700, Rui Paulo wrote: >> On 8 Oct 2013, at 10:41, Julian H. Stacey <jhs@berklix.com> wrote: >>> I too am seeing >>> urtwn0: timeout waiting for checksum report >> Sorry, this is a know problem that I haven't been able to figure out... >> It probably exists in the OpenBSD driver as well. Usually retrying works. > To augment this a bit: I also came across one of these dongles (vendor > 0x0bda product 0x8176) that gave me this "timeout waiting for checksum > report" message. Retrying didn't help, but plugging the dongle out and > then back in did. After powercycling the machine, I had to replug it > again. Once replugged, the dongle seems to work fine (I rebuilt kernel > and some ports via NFS over it thus far). > > This suggests that the driver (or more generic part of the USB stack) > does not initialize something correctly, while full plug-and-play thing > does it. Any ideas? We have to reset the bit of the R92C_MCUFWDL associated with checksum report before writing firmware. Could you try this patch? Thanks. Index: sys/dev/usb/wlan/if_urtwn.c =================================================================== --- sys/dev/usb/wlan/if_urtwn.c (revision 262971) +++ sys/dev/usb/wlan/if_urtwn.c (working copy) @@ -2071,6 +2071,10 @@ urtwn_load_firmware(struct urtwn_softc *sc) urtwn_write_1(sc, R92C_MCUFWDL + 2, urtwn_read_1(sc, R92C_MCUFWDL + 2) & ~0x08); + /* Reset the FWDL checksum. */ + urtwn_write_1(sc, R92C_MCUFWDL, + urtwn_read_1(sc, R92C_MCUFWDL) | R92C_MCUFWDL_CHKSUM_RPT); + for (page = 0; len > 0; page++) { mlen = min(len, R92C_FW_PAGE_SIZE); error = urtwn_fw_loadpage(sc, page, ptr, mlen);
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