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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 50600C43219 for ; Fri, 3 May 2019 22:03:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 217642075E for ; Fri, 3 May 2019 22:03:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="EYBs6j1u" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726957AbfECWDV (ORCPT ); Fri, 3 May 2019 18:03:21 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:35447 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726846AbfECWDV (ORCPT ); Fri, 3 May 2019 18:03:21 -0400 Received: by mail-pf1-f194.google.com with SMTP id t87so2960267pfa.2 for ; Fri, 03 May 2019 15:03:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=a7jf11BSROJYGYWGaMhdpSMdF9KlDBwardIcOhZ2vpE=; b=EYBs6j1u0ar6LZWMBPa86O/T+vhocQtHOspqto4ssJRYHXEOM+oclp5oo9qqEVSXJE iGjb5qXVAba/toGOcYwwd08qubZYp4aic0BGEbf+ZZXh+YqF0c0t++xBwveBanRismxc MG7ABlf5AgEJukxjvW/dfWTIhwFyPp/IFVWXs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=a7jf11BSROJYGYWGaMhdpSMdF9KlDBwardIcOhZ2vpE=; b=IjNy87rVrCkjIV/z/DxbZ8iCw/qjq0UpI9fYlLgJl4nqKCg/Hjjxyu3IYCHFb+H7fi mxD9F4uMjPbTALGMOM1SQxv95kMnuqKicu3HqqChjFw8OPRqeKspiBMI7StsWBHePbsi Cpicj9fGjVGoL9zb+Yrl+BK4yUMVDzVp4tgZjT1jBhpeEETsxrSiepqFbXbgdfjWUjQc 1j0iGkPv+Y4GLagMpC8cRRXl0exWh2WOG38tLkhOGtAhLgiRLi4mozkcr0YGLTWemcvh cPvr5jvn4DsdpEVU+UcncxXkKQ3p8MB3OG7/I2WQZROQqaVdlVp/BL6N5hQsADGhnpqi 0ibw== X-Gm-Message-State: APjAAAWbNVPIpxZQmt0Q/uAOCM5bWVm+F7l++w9TPqoPCK6HE0pkqZwn W/k/Ujl+wUyfRgDv290rEpnNhw== X-Google-Smtp-Source: APXvYqxg3DK7BDo0zppzRV9+Yt/49X75Nmj33RT+e5uAVKjOE1je0wqzV6pqO1AUwhuUXWk6YH9LOw== X-Received: by 2002:a65:4c07:: with SMTP id u7mr13282550pgq.93.1556921000826; Fri, 03 May 2019 15:03:20 -0700 (PDT) Received: from localhost ([2620:15c:202:1:3c8f:512b:3522:dfaf]) by smtp.gmail.com with ESMTPSA id m131sm7612238pfc.25.2019.05.03.15.03.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 03 May 2019 15:03:20 -0700 (PDT) From: Gwendal Grignou To: enric.balletbo@collabora.com, bleung@chromium.org, groeck@chromium.org, lee.jones@linaro.org, jic23@kernel.org, broonie@kernel.org, cychiang@chromium.org, tiwai@suse.com Cc: linux-iio@vger.kernel.org, alsa-devel@alsa-project.org, Gwendal Grignou Subject: [PATCH v2 23/30] mfd: cros_ec: Add I2C passthru protection API Date: Fri, 3 May 2019 15:02:26 -0700 Message-Id: <20190503220233.64546-24-gwendal@chromium.org> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog In-Reply-To: <20190503220233.64546-1-gwendal@chromium.org> References: <20190503220233.64546-1-gwendal@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Prevent direct i2c access to device behind EC when not in development mode. Acked-by: Enric Balletbo i Serra Signed-off-by: Gwendal Grignou --- include/linux/mfd/cros_ec_commands.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h index 49ea905cfd18..59ad6bae3f9b 100644 --- a/include/linux/mfd/cros_ec_commands.h +++ b/include/linux/mfd/cros_ec_commands.h @@ -4316,6 +4316,28 @@ struct ec_params_entering_mode { #define VBOOT_MODE_DEVELOPER 1 #define VBOOT_MODE_RECOVERY 2 +/*****************************************************************************/ +/* + * I2C passthru protection command: Protects I2C tunnels against access on + * certain addresses (board-specific). + */ +#define EC_CMD_I2C_PASSTHRU_PROTECT 0x00B7 + +enum ec_i2c_passthru_protect_subcmd { + EC_CMD_I2C_PASSTHRU_PROTECT_STATUS = 0x0, + EC_CMD_I2C_PASSTHRU_PROTECT_ENABLE = 0x1, +}; + +struct ec_params_i2c_passthru_protect { + uint8_t subcmd; + uint8_t port; /* I2C port number */ +} __ec_align1; + +struct ec_response_i2c_passthru_protect { + uint8_t status; /* Status flags (0: unlocked, 1: locked) */ +} __ec_align1; + + /*****************************************************************************/ /* * HDMI CEC commands -- 2.21.0.1020.gf2820cf01a-goog