From: Richard Miller <9fans@hamnavoe.com>
To: 9fans@9fans.net
Subject: Re: [9fans] Raspberry Pi: won't recognize the USB mouse
Date: Sun, 2 Mar 2014 19:54:28 +0000 [thread overview]
Message-ID: <36c581db6ee4981e87889b22a0360d00@hamnavoe.com> (raw)
In-Reply-To: <f90fe7fffd4df0084a6d0921b7fa7f37@mikro.quanstro.net>
> also, according to the linux kernel, we should not be looking for
> configurations on anything that's not a hub.
Personally I wouldn't look to the linux kernel as guidance for
correct behaviour. Especially when there's a published specification
available.
Every usb device has at least one configuration descriptor. The usb
spec allows for more than one, with a well-defined method for choosing
between them (not supported by plan 9 usb infrastructure). In
practice though, it seems common for devices to ignore this and use some
bizarre proprietary and undocumented way to switch configurations instead.
Hence the need for abominations like the linux usb_modeswitch utility.
next prev parent reply other threads:[~2014-03-02 19:54 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-01 5:43 Michael Hansen
2014-03-01 12:09 ` Richard Miller
2014-03-01 12:12 ` erik quanstrom
2014-03-02 10:46 ` Richard Miller
2014-03-02 14:57 ` erik quanstrom
2014-03-02 19:54 ` Richard Miller [this message]
2014-03-02 23:22 ` Winston Kodogo
2014-03-03 1:29 ` erik quanstrom
2014-03-03 11:05 ` Richard Miller
2014-03-03 11:24 ` Richard Miller
2014-03-03 13:39 ` erik quanstrom
-- strict thread matches above, loose matches on Subject: below --
2014-03-02 1:12 Michael Hansen
2014-03-02 1:39 ` erik quanstrom
2014-02-26 16:27 Ramakrishnan Muthukrishnan
2014-02-26 17:19 ` Richard Miller
2014-02-27 16:27 ` Ramakrishnan Muthukrishnan
2014-02-27 16:35 ` Ramakrishnan Muthukrishnan
2014-02-27 17:05 ` Ramakrishnan Muthukrishnan
2014-02-27 17:08 ` Lyndon Nerenberg
2014-02-27 17:31 ` Ramakrishnan Muthukrishnan
2014-02-27 18:03 ` Bakul Shah
2014-02-28 11:10 ` Ramakrishnan Muthukrishnan
2014-02-28 11:28 ` Richard Miller
2014-02-28 14:12 ` Ramakrishnan Muthukrishnan
2014-02-28 14:35 ` Bakul Shah
2014-02-28 15:12 ` Ramakrishnan Muthukrishnan
2014-02-28 14:45 ` Anthony Sorace
2014-02-28 15:15 ` Ramakrishnan Muthukrishnan
2014-02-28 16:24 ` Bakul Shah
2014-03-04 14:12 ` Ramakrishnan Muthukrishnan
2014-03-04 14:27 ` erik quanstrom
2014-03-04 15:54 ` Ramakrishnan Muthukrishnan
2014-03-04 16:26 ` erik quanstrom
2014-03-04 18:18 ` Bakul Shah
2014-03-04 18:26 ` erik quanstrom
2014-03-08 14:56 ` Ramakrishnan Muthukrishnan
2014-03-08 14:59 ` erik quanstrom
2014-03-09 13:25 ` Ramakrishnan Muthukrishnan
2014-03-09 13:46 ` erik quanstrom
2014-03-05 10:57 ` Richard Miller
2014-03-05 10:59 ` Richard Miller
2014-02-27 17:10 ` erik quanstrom
2014-02-27 17:15 ` Steve Simon
2014-02-26 17:22 ` Ramakrishnan Muthukrishnan
2014-02-28 4:31 ` Grant Mather
2014-02-28 9:05 ` erik quanstrom
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