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From: "Sjur Brændeland" <sjurbren@gmail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	Linus Walleij <linus.walleij@linaro.org>,
	Ohad Ben-Cohen <ohad@wizery.com>
Subject: Re: [RESEND PATCHv5 09/11] modem_shm: Character device for SHM channel access.
Date: Thu, 2 Aug 2012 14:11:05 +0200	[thread overview]
Message-ID: <CAJK669YEbAq7xue9rAK9ikiUNm_ZVQZ4CaPhSr22xU56a_2B0g@mail.gmail.com> (raw)
In-Reply-To: <20120802112542.6ae3dd8f@pyramind.ukuu.org.uk>

>On Thu, Aug 2, 2012 at 12:25 PM,
>Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
>> Add a character device implementation for the SHM stream channels.
>> The character device provides asynchronous IO and ring-buffer handling.
>> The device copies data directly from the Shared Memory area into
>> user-land buffers.
>
> What is the use case for this - it seems a little odd that it's not using
> the tty layer so won't work with all the normal modem apps as anyone
> would expect and want ?

Hi Alan,

Thank you for reviewing this patch.

I am working on a re-spin of the entire patch-set for Modem-SHM using
the RemoteProc framework from Ohad Ben Cohen and using Virtio as
transport mechanism between modem and host. I hope to be able to
use Virtio Console for the tty.The use-case tty/char device is for
transfering boot images to the modem and fetch crash logs.

For normal operation of the modem the CAIF protocol is used. I'm writing
on a new CAIF-Virtio driver for this that works with the RemoteProc
framework.

Regards,
Sjur

  reply	other threads:[~2012-08-02 12:11 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-31  8:48 [RESEND PATCHv5 00/11] modem_shm: Driver for ST-E Thor M7400 LTE modem Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 01/11] modem_shm: Shared Memory layout for ST-E M7400 driver Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 02/11] modem_shm: Channel config definitions " Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 03/11] modem_shm: Configuration for SHM Channel an devices Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 04/11] modem_shm: geni/geno driver interface Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 05/11] modem_shm: genio dummy driver Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 06/11] modem_shm: Add SHM device bus Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 07/11] modem_shm: Add shm device implementation Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 08/11] modem_shm: SHM Configuration data handling Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 09/11] modem_shm: Character device for SHM channel access Sjur Brændeland
2012-08-02 10:25   ` Alan Cox
2012-08-02 12:11     ` Sjur Brændeland [this message]
2012-08-07 10:03       ` Alan Cox
2012-01-31  8:48 ` [RESEND PATCHv5 10/11] modem_shm: Makefile and Kconfig for M7400 Shared Memory Drivers Sjur Brændeland
2012-01-31  8:48 ` [RESEND PATCHv5 11/11] caif_shm: Add CAIF driver for Shared memory for M7400 Sjur Brændeland

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