Date: Wed, 5 Oct 2022 18:31:26 +0200 From: Axel Rau <Axel.Rau@Chaos1.DE> To: Hans Petter Selasky <hps@selasky.org> Cc: hardware@freebsd.org, freebsd-hackers@freebsd.org Subject: Re: Accessing I2C-Bus via ELV USB-I2C Message-ID: <23E6D546-DAEF-468D-AE40-752EEB279C8A@Chaos1.DE> In-Reply-To: <c033a26c-10e1-29e6-bc87-a81fe32cfb92@selasky.org> References: <996df5c0-ffa7-f1bf-a9e2-6dd47d7b49e6@Chaos1.DE> <35D556D7-56EC-4295-93D6-80A4CFE6DCE9@Chaos1.DE> <37c55124-5cd5-6fd1-ca46-9265ebe47b18@selasky.org> <602324D8-515B-4061-8689-5638E9A82759@Chaos1.DE> <2cb6203f-03da-9a05-24a5-c851f1424503@selasky.org> <F81783C4-F79F-48A1-A5BE-25D997DF29DA@Chaos1.DE> <beafa2e5-17e7-491a-d104-a0ede1b69ce3@selasky.org> <490EBA38-E103-4DC1-8A42-E16A8279980D@Chaos1.DE> <017C6EBE-910E-43E7-AAF7-A3D9ECE85EFF@Chaos1.DE> <84c5bc0b-1c72-d50d-6289-ac91a0878bd1@selasky.org> <752FCC61-496D-40C5-8A99-143F15B1EE84@Chaos1.DE> <c033a26c-10e1-29e6-bc87-a81fe32cfb92@selasky.org>
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--Apple-Mail=_31A3D805-29A8-41CD-AB61-E08C5B1687EF Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > Am 05.10.2022 um 16:46 schrieb Hans Petter Selasky <hps@selasky.org>: >=20 > On 10/5/22 13:55, Axel Rau wrote: >> If I do not want to touch th USB stuff, can I get the same effect by = close/open of the serial device? >=20 > The uslcom driver only does this right after attach, in 13-stable and = 14-main. >=20 > Does the attached patch make any difference for you? >=20 > --HPS > <0001-uslcom-4-Clear-stall-at-every-open.patch> As this is a production server, I try to avoid reboots. Meanwhile, I have inserted a read loop which eats the fragments and allows the following status query to get a clean response. With this patch, recovery seems to work. Additionally I have eliminated a hub and connected the device directly = to a port. Hopefully this will stop the frequent `/dev/cuaU0: Bus connection = lost`events. Thanks for your time, Axel =2D-- PGP-Key: CDE74120 =E2=98=80 computing @ chaos claudius --Apple-Mail=_31A3D805-29A8-41CD-AB61-E08C5B1687EF Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 <html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; = charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; -webkit-nbs= p-mode: space; line-break: after-white-space;" class=3D""><br class=3D"">= <div><br class=3D""><blockquote type=3D"cite" class=3D""><div class=3D"">= Am 05.10.2022 um 16:46 schrieb Hans Petter Selasky <<a href=3D"mailto:= hps@selasky.org" class=3D"">hps@selasky.org</a>>:</div><br class=3D"Ap= ple-interchange-newline"><div class=3D""><div class=3D"">On 10/5/22 = 13:55, Axel Rau wrote:<br class=3D""><blockquote type=3D"cite" class=3D""= >If I do not want to touch th USB stuff, can I get the same effect by = close/open of the serial device?<br class=3D""></blockquote><br class=3D"= ">The uslcom driver only does this right after attach, in 13-stable and = 14-main.<br class=3D""><br class=3D"">Does the attached patch make any = difference for you?<br class=3D""><br class=3D"">--HPS<br class=3D""><spa= n id=3D"cid:05653FFF-4DA4-424D-8FE0-1CBF8FE0F90C@in.chaos1.de"><0001-u= slcom-4-Clear-stall-at-every-open.patch></span></div></div></blockquot= e></div>As this is a production server, I try to avoid reboots.<div = class=3D""><br class=3D""></div><div class=3D"">Meanwhile, I have = inserted a read loop which eats the fragments</div><div class=3D"">and = allows the following status query to get a clean response.</div><div = class=3D"">With this patch, recovery seems to work.</div><div class=3D"">= <br class=3D""></div><div class=3D"">Additionally I have eliminated a = hub and connected the device directly to a port.</div><div class=3D"">Hop= efully this will stop the frequent `/dev/cuaU0: Bus connection lost`event= s.</div><div class=3D""><br class=3D""></div><div class=3D"">Thanks for = your time,</div><div class=3D"">Axel<br class=3D""><div class=3D""> <div dir=3D"auto" style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, = 0); letter-spacing: normal; text-align: start; text-indent: 0px; = text-transform: none; white-space: normal; word-spacing: 0px; -webkit-tex= t-stroke-width: 0px; text-decoration: none; word-wrap: break-word; = -webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div= dir=3D"auto" style=3D"caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); = letter-spacing: normal; text-align: start; text-indent: 0px; text-transfo= rm: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-wid= th: 0px; text-decoration: none; word-wrap: break-word; -webkit-nbsp-mode:= space; line-break: after-white-space;" class=3D""><div style=3D"color: = rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: = 0px; text-transform: none; white-space: normal; word-spacing: 0px; = -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode:= space; line-break: after-white-space;" class=3D""><div style=3D"color: = rgb(0, 0, 0); letter-spacing: normal; text-align: start; text-indent: = 0px; text-transform: none; white-space: normal; word-spacing: 0px; = -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode:= space; line-break: after-white-space;" class=3D""><div style=3D"color: = rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant-li= gatures: normal; font-variant-position: normal; font-variant-caps: = normal; font-variant-numeric: normal; font-variant-alternates: normal; = font-variant-east-asian: normal; font-weight: normal; letter-spacing: = normal; line-height: normal; orphans: 2; text-align: -webkit-auto; = text-indent: 0px; text-transform: none; white-space: normal; widows: 2; = word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word;= -webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><di= v class=3D"">---<br class=3D"">PGP-Key: CDE74120 =E2=98=80 = computing @ chaos claudius</div></div></div></div></div></div> </div> <br class=3D""></div></body></html> --Apple-Mail=_31A3D805-29A8-41CD-AB61-E08C5B1687EF--
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