From: Paul Rolland <rol@as2917.net>
To: Oliver Neukum <oliver@neukum.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-usb@vger.kernel.org, rol@as2917.net
Subject: Re: usbserial speed limitations ?
Date: Thu, 4 Feb 2010 12:45:44 +0100 [thread overview]
Message-ID: <20100204124544.7e29ea3f@tux.DEF.witbe.net> (raw)
In-Reply-To: <201002041226.21379.oliver@neukum.org>
Hi Oliver,
On Thu, 4 Feb 2010 12:26:21 +0100
Oliver Neukum <oliver@neukum.org> wrote:
> Am Donnerstag, 4. Februar 2010 09:58:55 schrieb Paul Rolland:
> > "Maximum connection speed is limited by the current generic usbserial
> > driver to approximately less than 500kbps."
> >
> > Is there really such a speed limitation in the usbserial module/driver ?
> > This modem is HSPA+, which should allow a theorical maximum downspeed of
> > 20MBps, not 500kbps...
>
> In the generic usbserial driver this speed limit indeed exists.
> But you are not supposed to use it with that kind of device.
> Most likely the correct driver would be either option or sierra.
> Please post lsusb -v for your device.
I don't have yet the device, but the informations I have so far are :
- It is Vendor ID 0x1410, product ID 0x5023 when connected for the first
time, and then it is a disk device.
- Ejecting it makes it appear as Vendor ID 0x1410, product ID 0x7030
Novatel also refers to their procedure for the linux installation :
(http://www.nvtl.com/index.php?option=com_content&view=article&id=139&Itemid=305
which has a link to
http://www.nvtl.com/index.php?option=com_content&view=article&id=176&Itemid=331)
This applies to Ovation MC930D and Ovation MC950D, which are supported by
option.c
So, I suspect the best would be to add the 0x7030 Product ID in the option
driver, and git it a shoot...
Regards,
Paul
next prev parent reply other threads:[~2010-02-04 11:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-04 8:58 usbserial speed limitations ? Paul Rolland
2010-02-04 11:26 ` Oliver Neukum
2010-02-04 11:45 ` Paul Rolland [this message]
2010-02-04 11:56 ` Oliver Neukum
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