From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D387EC433F2 for ; Thu, 23 Jul 2020 22:37:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A6AD920792 for ; Thu, 23 Jul 2020 22:37:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="t/Tt3hCG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728243AbgGWWhK (ORCPT ); Thu, 23 Jul 2020 18:37:10 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:61666 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728189AbgGWWhI (ORCPT ); Thu, 23 Jul 2020 18:37:08 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1595543828; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=V6tQauXNnRZsRCe4EKcmLR9wT3s+aJk+zpsyhH/0h9k=; b=t/Tt3hCG4wPJm88+I6ozMdzBi82w2GHikTm7imBf/BczJP5mkmkN70ECWaJVfZUpmHG+x7PQ Rb6DlYSHHlVd+cEfEC2tUaOyPlY/yaa2zGpxf/qgkA9V1072UTxHdhOYH3Btre4dg+JxsugN 7s4dvE/iQB37nkZhuXtyz3Ui9/A= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n16.prod.us-east-1.postgun.com with SMTP id 5f1a11081e603dbb4451cc0c (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 23 Jul 2020 22:36:56 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 8BC64C433AD; Thu, 23 Jul 2020 22:36:55 +0000 (UTC) Received: from malabar-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id E50B8C433CA; Thu, 23 Jul 2020 22:36:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E50B8C433CA Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v5 09/10] bus: mhi: core: Read and save device hardware information from BHI Date: Thu, 23 Jul 2020 15:36:41 -0700 Message-Id: <1595543802-17859-10-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1595543802-17859-1-git-send-email-bbhatt@codeaurora.org> References: <1595543802-17859-1-git-send-email-bbhatt@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Device hardware specific information such as serial number and the OEM PK hash can be read using BHI and saved on host to identify the endpoint. Signed-off-by: Bhaumik Bhatt Reviewed-by: Jeffrey Hugo Reviewed-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/boot.c | 17 ++++++++++++++++- include/linux/mhi.h | 6 ++++++ 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index 0b38014..24422f5 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -392,13 +392,28 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) void *buf; dma_addr_t dma_addr; size_t size; - int ret; + int i, ret; if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) { dev_err(dev, "Device MHI is not in valid state\n"); return; } + /* save hardware info from BHI */ + ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_SERIALNU, + &mhi_cntrl->serial_number); + if (ret) + dev_err(dev, "Could not capture serial number via BHI\n"); + + for (i = 0; i < ARRAY_SIZE(mhi_cntrl->oem_pk_hash); i++) { + ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_OEMPKHASH(i), + &mhi_cntrl->oem_pk_hash[i]); + if (ret) { + dev_err(dev, "Could not capture OEM PK HASH via BHI\n"); + break; + } + } + /* If device is in pass through, do reset to ready state transition */ if (mhi_cntrl->ee == MHI_EE_PTHRU) goto fw_load_ee_pthru; diff --git a/include/linux/mhi.h b/include/linux/mhi.h index b1e8b4f..dad6246 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -16,6 +16,8 @@ #include #include +#define MHI_MAX_OEM_PK_HASH_SEGMENTS 16 + struct mhi_chan; struct mhi_event; struct mhi_ctxt; @@ -315,6 +317,8 @@ struct mhi_controller_config { * @device_number: MHI controller device number * @major_version: MHI controller major revision number * @minor_version: MHI controller minor revision number + * @serial_number: MHI controller serial number obtained from BHI + * @oem_pk_hash: MHI controller OEM PK Hash obtained from BHI * @mhi_event: MHI event ring configurations table * @mhi_cmd: MHI command ring configurations table * @mhi_ctxt: MHI device context, shared memory between host and device @@ -394,6 +398,8 @@ struct mhi_controller { u32 device_number; u32 major_version; u32 minor_version; + u32 serial_number; + u32 oem_pk_hash[MHI_MAX_OEM_PK_HASH_SEGMENTS]; struct mhi_event *mhi_event; struct mhi_cmd *mhi_cmd; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project