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=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 49542C04AA7 for ; Mon, 13 May 2019 15:39:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1884321473 for ; Mon, 13 May 2019 15:39:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="NmalT44E" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731377AbfEMPjj (ORCPT ); Mon, 13 May 2019 11:39:39 -0400 Received: from mail-lf1-f41.google.com ([209.85.167.41]:33684 "EHLO mail-lf1-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728046AbfEMPjj (ORCPT ); Mon, 13 May 2019 11:39:39 -0400 Received: by mail-lf1-f41.google.com with SMTP id x132so9450396lfd.0; Mon, 13 May 2019 08:39:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:subject:to:cc:message-id:date:user-agent:mime-version :content-transfer-encoding:content-language; bh=Im1JV8DmKWSE2P0cw0hdXGTTWoH4wIN3ko1j8EjIKGQ=; b=NmalT44E0CYo0cQoCmLmb7XQcTF/Tw6YKkRlahp7AFEH/JQq6QevaJwCk8OuHpaJA2 iOcqFvECUAi6tYBr1oZXtAr3bbLO1zGFy38G2+zaxm4+ssdAuFoKDohxlrWjdOGJPgKz nWPcm/++RmCEOYJKnRCwCM0XCYjgBvOwkzLKHQDHY00ii1ZuPOpVHAfRYNfV+Qxhjba3 vqYOVDyI8lFqScAVMKIUYq7vWjrp6wl4FqpHArFXRNkjo9T4FBINcMWAu5/KHZBEi+qe kavKmvcOawFgfmkvxeAygdnnSVRBzIrljq8bbZ+V88bbbFRNZQKP7lBa6DWyrHAx8yUm kAbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:cc:message-id:date:user-agent :mime-version:content-transfer-encoding:content-language; bh=Im1JV8DmKWSE2P0cw0hdXGTTWoH4wIN3ko1j8EjIKGQ=; b=UPQ8Ls/GnaPbKYpvNpTwadWc/Qp36M7lHnONIqlu60UFrWz7z5n2SylD4iOTnF/AsY W+fMg1YEC1cXd240egFv0BjzP2+J2h0Mh4t/KdshDLNivITZT9tAfYdNbB37buQ6M3bc aeDyzIl++Js03Of5PW9OT6Tb62KNPaOETmYwxygMK7tfTDeiE1naEctm6zp7dcKoS/qj diwoc/4qsb95tyqQa+YfzzRxogq2O4RJa2XJXYc7M+fmp0zqir8buwnzjaOsz37OKjzX Ms5LKsBUAIejim4exqhpKKvBvhe3eihzuq+ySoofcGIXKLd3X+eIA6/602X23tCAVLqt KR0g== X-Gm-Message-State: APjAAAXusOLw2TQqKAEZrMrtAg447A29J+aEw1khUQ4ymHRaLvcKOu2D dTV+XOM75dZsIfPkGfnOY+AiLF+/ X-Google-Smtp-Source: APXvYqxq7DiPUmvMARUX3uWlv0n6ibeaZkY1u2rWKy81j/pGxh+HWxQGS0eQ917yphwfRZfOeTDElA== X-Received: by 2002:a19:5507:: with SMTP id n7mr14726777lfe.140.1557761976859; Mon, 13 May 2019 08:39:36 -0700 (PDT) Received: from [192.168.1.10] ([95.174.107.249]) by smtp.gmail.com with ESMTPSA id x6sm3261852lfn.74.2019.05.13.08.39.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 May 2019 08:39:36 -0700 (PDT) From: Igor Plyatov Subject: Initialisation of SOC USB pads To: linux-usb@vger.kernel.org Cc: Alan Stern , Greg Kroah-Hartman , "linux-kernel@vger.kernel.org" Message-ID: <607c6b4c-d53a-8115-aa60-2a8461607d40@gmail.com> Date: Mon, 13 May 2019 18:39:34 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 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 Dear developers, can you please explain who must configure AT91SAM9G20 SOC pads to operate as USB Host port? Is it AT91Bootstrap, U-Boot bootloader, Linux kernel or this is not required at all? I ask, because during connection of USB disk, my board complains usb 1-1: device descriptor read/64, error -62 usb 1-1: device descriptor read/64, error -62 usb 1-1: device descriptor read/64, error -62 usb 1-1: device descriptor read/64, error -62 usb 1-1: device not accepting address 4, error -62 usb 1-1: device not accepting address 5, error -62 usb usb1-port1: unable to enumerate USB device Looks like there is no connectivity between USB Host module of SOC and USB device. Or am I wrong? My setup is: * AT91SAM9G20 based custom board; * Linux kernel 4.9.36, from LINUX4SAM project. * USB disk connected to USB Host port 0 (HDPA, HDMA pins of SOC). 39 Ohm series resistors and 15 Kohm pull-down resistors added at these lines. Connectivity between SOC and USB device confirmed by Ohmmeter. * USB_VBUS voltage measured at USB connector = 4.96 VDC. Best wishes -- Igor Plyatov