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[209.132.180.67]) by mx.google.com with ESMTP id y8-v6si14990215pli.242.2018.05.03.20.06.27; Thu, 03 May 2018 20:06:42 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@codeaurora.org header.s=default header.b=Q7w2T4/M; dkim=pass header.i=@codeaurora.org header.s=default header.b=Q7w2T4/M; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751354AbeEDDFI (ORCPT + 99 others); Thu, 3 May 2018 23:05:08 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:46078 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241AbeEDDFH (ORCPT ); Thu, 3 May 2018 23:05:07 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id A159060588; Fri, 4 May 2018 03:05:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1525403106; bh=EkxawONP7MbeViATjbgLrV5jOIxea3ngUIga2GJ/Ibs=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=Q7w2T4/MZ9NKaWjtTt0CbEtP1PH+/3RcAE7lQV6n3MNQ6pPrxe9dSpx4EJ5ep07/q 8Jjiza50FBG4un8kh3cSJIG8Ia9uyKfZD3wO5NFFqoE4DB9hjr9JFTCwCC07iPjotr NdSEjLlY96L8nmljbuSXEvC1mRwMDmNw1MXgz080= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED,T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.0 Received: from [10.46.162.58] (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: sdias@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id ECBE36028D; Fri, 4 May 2018 03:05:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1525403106; bh=EkxawONP7MbeViATjbgLrV5jOIxea3ngUIga2GJ/Ibs=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=Q7w2T4/MZ9NKaWjtTt0CbEtP1PH+/3RcAE7lQV6n3MNQ6pPrxe9dSpx4EJ5ep07/q 8Jjiza50FBG4un8kh3cSJIG8Ia9uyKfZD3wO5NFFqoE4DB9hjr9JFTCwCC07iPjotr NdSEjLlY96L8nmljbuSXEvC1mRwMDmNw1MXgz080= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org ECBE36028D Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=sdias@codeaurora.org Subject: Re: [PATCH v1 1/4] mhi_bus: core: Add support for MHI host interface To: Pavel Machek Cc: Greg Kroah-Hartman , Arnd Bergmann , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Tony Truong References: <1524795811-21399-1-git-send-email-sdias@codeaurora.org> <1524795811-21399-2-git-send-email-sdias@codeaurora.org> <20180503192110.bjd46afhe2ein3qm@devuan> From: Sujeev Dias Message-ID: Date: Thu, 3 May 2018 20:05:04 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <20180503192110.bjd46afhe2ein3qm@devuan> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Pavel On 05/03/2018 12:21 PM, Pavel Machek wrote: > Hi! > >> MHI Host Interface is a communication protocol to be used by the host >> to control and communcate with modem over a high speed peripheral bus. >> This module will allow host to communicate with external devices that >> support MHI protocol. > I have Motorola Droid 4 cellphone here, with Qualcomm GSM modem. But > it talks over serial line and USB. I guess MHI is not applicable to my > hardware? > MHI is for PCIe based modem, in any case I can't comment about commercial devices. >> +MHI Devices >> +----------- >> +Logical device that bind to maximum of two physical MHI channels. Once MHI is in >> +powered on state, each supported channel by controller will be allocated as a >> +mhi_device. > What kind of protocol is running over MHI? I guess its not AT > commands. QMI? Or something entirely different? All modem services between external modem and host go over MHI. So QMI, AT, all other data and control services go thru MHI host driver. > Pavel Thanks Sujeev -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project