From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sujeev Dias Subject: Re: [PATCH v1 1/4] mhi_bus: core: Add support for MHI host interface Date: Thu, 3 May 2018 20:05:04 -0700 Message-ID: References: <1524795811-21399-1-git-send-email-sdias@codeaurora.org> <1524795811-21399-2-git-send-email-sdias@codeaurora.org> <20180503192110.bjd46afhe2ein3qm@devuan> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180503192110.bjd46afhe2ein3qm@devuan> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: Pavel Machek Cc: Greg Kroah-Hartman , Arnd Bergmann , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Tony Truong List-Id: linux-arm-msm@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