From patchwork Tue Feb 9 09:53:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Michal Simek X-Patchwork-Id: 12077657 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=-21.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,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 D5837C433E0 for ; Tue, 9 Feb 2021 09:57:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7CA1F64DE8 for ; Tue, 9 Feb 2021 09:57:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230360AbhBIJ5A (ORCPT ); Tue, 9 Feb 2021 04:57:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229690AbhBIJyy (ORCPT ); Tue, 9 Feb 2021 04:54:54 -0500 Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com [IPv6:2a00:1450:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF73CC061221 for ; Tue, 9 Feb 2021 01:53:27 -0800 (PST) Received: by mail-ej1-x631.google.com with SMTP id hs11so30331907ejc.1 for ; Tue, 09 Feb 2021 01:53:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monstr-eu.20150623.gappssmtp.com; s=20150623; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=kH2IpWZSoU7LW6R55FxG2fdVhcdDOZnt8IKAlaXn2Os=; b=jZukgeg/LBUT2AFJCMDjAdquPLJG9ll9QRW80i5PgBJgg0QuhC5KrKrmM52fQ7tLPU hjPZPeQeZf29nSwCJc6/nOmNPpAmaNGPr0+8KAjifuIIbGdPQXV5homhK38I3LFH1x08 ESh9Ss+Ov26bPlWYFbqu7anFCl/n5/LacIQaBITUtzcbr4vMX0pYTQ9uvpK8dF8sWYUh zABcT3AqeopL2Ahx0APjilN0MXrFHw5O/IMOXNAsPNy7fkzC0MhX2rAbVLo68+4CmB0z Ogxn6nk2eVQGMoDvpg+fFShRkwr/pSWeMG0Ercob3Ni+w/py+MGriWPWKb9yvnNPDrZv jFsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=kH2IpWZSoU7LW6R55FxG2fdVhcdDOZnt8IKAlaXn2Os=; b=ibN5SB88LfvH+fMUJoQU68NTZ8iepYsKFYkMTZrTlhDjMZiAsRSQBqtaxEnB/WM578 iZ6ejWnTN/IFY94UsxclNF/gkcrW59OSMIrlIxe7jNbjxaj6meIZ70Hf6s5Z+1a9j1wy wE4+KlT9KU/b1WjHCsRJR4AZncP9iAK+AyFGXbSAT7ooH5nctjehi8JwyOulD1RyndjC WNreXoxbW8+/FmAL0GyeYx4+FkUf99iSg3y5KjlrepL3OXwFf4bWh8udJKr1LCwl0MHx gAuOK2OJwGqVMsMPNKG5+00zADAYdaq88S3FeFkJ6/TnMz2caa4F3MR4CGBe+6Q/Acfy 6Hqw== X-Gm-Message-State: AOAM530r8kF52L3QR+th6AGAh9UoLFokKYPG5mjEHrj6e3AG3T7boMhd DmLVvmKdwzE2uRtBKFi/EZFwqA== X-Google-Smtp-Source: ABdhPJyNdJEyeK6H4oxf1gdNfOAMY6MonFBUSvcYuEIE0IV+c0h6Yyl6X354S2mwVRxbgf44CNlXsA== X-Received: by 2002:a17:907:20c4:: with SMTP id qq4mr20479872ejb.495.1612864406681; Tue, 09 Feb 2021 01:53:26 -0800 (PST) Received: from localhost (nat-35.starnet.cz. [178.255.168.35]) by smtp.gmail.com with ESMTPSA id v26sm11457148edw.23.2021.02.09.01.53.26 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 09 Feb 2021 01:53:26 -0800 (PST) Sender: Michal Simek From: Michal Simek To: linux-kernel@vger.kernel.org, monstr@monstr.eu, michal.simek@xilinx.com, git@xilinx.com Cc: Piyush Mehta , Greg Kroah-Hartman , Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org Subject: [PATCH 1/2] dt-bindings: usb: misc: Add binding for Microchip usb5744 hub Date: Tue, 9 Feb 2021 10:53:19 +0100 Message-Id: <076994fc051e9230a3fef9e3eb5ec932104ef16a.1612864393.git.michal.simek@xilinx.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Piyush Mehta Added dt binding for usb5744 driver. Signed-off-by: Piyush Mehta Signed-off-by: Michal Simek --- .../bindings/usb/microchip,usb5744.yaml | 56 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/microchip,usb5744.yaml diff --git a/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml b/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml new file mode 100644 index 000000000000..fe222f6db81d --- /dev/null +++ b/Documentation/devicetree/bindings/usb/microchip,usb5744.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/usb/microchip,usb5744.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Bindings for the Microchip USB5744 4-port Hub Controller + +description: + Microchip’s USB5744 SmartHub™ IC is a 4 port, SuperSpeed (SS)/Hi-Speed (HS), + low power, low pin count configurable and fully compliant with the USB 3.1 + Gen 1 specification. The USB5744 also supports Full Speed (FS) and Low Speed + (LS) USB signaling, offering complete coverage of all defined USB operating + speeds. The new SuperSpeed hubs operate in parallel with the USB 2.0 + controller, so 5 Gbps SuperSpeed data transfers are not affected by slower + USB 2.0 traffic. + +maintainers: + - Piyush Mehta + - Michal Simek + +properties: + compatible: + const: microchip,usb5744 + + reg: + maxItems: 1 + description: | + Specifies the i2c slave address, it is required and should be 0x2d + if I2C is used. + + reset-gpios: + maxItems: 1 + description: + The phandle and specifier for the GPIO that controls the RESET line of + USB hub. + +required: + - compatible + +additionalProperties: false + +examples: + - | + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + usb5744@2d { + compatible = "microchip,usb5744"; + reg = <0x2d>; + reset-gpios = <&gpio 44 GPIO_ACTIVE_HIGH>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 41e8d3d7faec..7439471b5d37 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2697,6 +2697,7 @@ W: http://wiki.xilinx.com T: git https://github.com/Xilinx/linux-xlnx.git F: Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml F: Documentation/devicetree/bindings/i2c/xlnx,xps-iic-2.00.a.yaml +F: Documentation/devicetree/bindings/usb/microchip,usb5744.yaml F: arch/arm/mach-zynq/ F: drivers/block/xsysace.c F: drivers/clocksource/timer-cadence-ttc.c From patchwork Tue Feb 9 09:53:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Simek X-Patchwork-Id: 12077655 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 ED488C433DB for ; Tue, 9 Feb 2021 09:56:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A40CC64E9D for ; Tue, 9 Feb 2021 09:56:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230385AbhBIJ4g (ORCPT ); Tue, 9 Feb 2021 04:56:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230399AbhBIJy1 (ORCPT ); Tue, 9 Feb 2021 04:54:27 -0500 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5F619C061224 for ; Tue, 9 Feb 2021 01:53:29 -0800 (PST) Received: by mail-ej1-x629.google.com with SMTP id f14so30247265ejc.8 for ; Tue, 09 Feb 2021 01:53:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monstr-eu.20150623.gappssmtp.com; s=20150623; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=l6McvaymhglpJsw5cFqu8G0AvV7wzVMGX2JtuLfyQvE=; b=QWCLLvI+tNV6X5F6ZqgMQRyLnZdhzEPovZRp83/KNkzxUZ9/ITTEBJxAuhlkVQ0CPb BVUsI9fsUjGmDdn7K2v9fDj20axZ+Y6iHLD4eMD5BTKkbSKQKFCTqvL8ErLuMGo0xvf0 +smK57GbogO7H3Byokw5zuL0DNW7r9Umajzd+RKjC1vYVL4pWRB/S+zazPp4z/GFveBc z4OW5OepIvQ4Gu7T/CmnEBqtu+SLJBHbMLNDZbGM93gIYNgGz58oYdBsIxR64D0DfpUU E9S5ez1u7hFF/jg8y6T2stSplrHuL6bRvEwp9TLKrKLjrecBXayaOrGEXeoqGXPpA6O4 PJAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=l6McvaymhglpJsw5cFqu8G0AvV7wzVMGX2JtuLfyQvE=; b=IuY4JWXe2wq7+1t34aGI38i282c8Wfi0CE5FoYz81Ojn1DxmrXUxR6Gx6iq+Ra161D wXyC7TNre/Lb4RmrtFxYMoa63n0vrZCbGr32ssOgqSO/1yMKHFDd6n0GSh9riqrXh4S2 7goJh6BYp8YGjiTPPEIqsIzUH2i7d0IdNcCpAMnBNdF6XQl+Yh7sNjAk7Rv3B/XagjXJ QyfnhET4EciG9M4ydG+1VoSPFJczAKpMJ1wFYULhImctg3Xb8cS/n15PevBRv0A0EgMe SNkx/Xj22OMui7+Fh61zrYqBSgE1LvY0lZuhFPcFHI6JDJ2wUg+aAZ2R5BS9Q+pb3W/o 2ksw== X-Gm-Message-State: AOAM531LbZ0fkw/1SzAGkfoISoyEAoWh9rqRorrmC1JXozABVfkMLInR koy7rIij+U7RRrhraqtOq9lEKA== X-Google-Smtp-Source: ABdhPJxiRvcNejewspSY8w7zq0dyXQJIDHDWET7hs+GP+g66T0jmvNHtYJeUVaqC8kV6+sTAr20kXw== X-Received: by 2002:a17:906:80b:: with SMTP id e11mr21316977ejd.269.1612864408059; Tue, 09 Feb 2021 01:53:28 -0800 (PST) Received: from localhost (nat-35.starnet.cz. [178.255.168.35]) by smtp.gmail.com with ESMTPSA id a1sm8308589edj.6.2021.02.09.01.53.27 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 09 Feb 2021 01:53:27 -0800 (PST) Sender: Michal Simek From: Michal Simek To: linux-kernel@vger.kernel.org, monstr@monstr.eu, michal.simek@xilinx.com, git@xilinx.com Cc: Piyush Mehta , Al Cooper , Alan Stern , "Alexander A. Klimov" , Bastien Nocera , Greg Kroah-Hartman , Masahiro Yamada , linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org Subject: [PATCH 2/2] usb: misc: usb5744: Add support for USB hub controller Date: Tue, 9 Feb 2021 10:53:20 +0100 Message-Id: X-Mailer: git-send-email 2.30.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Piyush Mehta This patch adds a USB GPIO based hub reset for USB5744 hub. This usb5744 driver trigger hub reset signal after soft reset or core Reset. The HUB needs to be resetted after completion of phy initialization. After the toggling of gpio, hub configure using i2c usb attached command. USB5744 hub can be used without any I2C connection, is handled by a simple platform device driver. As part of the reset, sets the direction of the pin to output before toggling the pin. Delay of millisecond is added in between low and high to meet the setup and hold time requirement of the reset. Signed-off-by: Piyush Mehta Signed-off-by: Michal Simek --- MAINTAINERS | 1 + drivers/usb/misc/Kconfig | 9 +++ drivers/usb/misc/Makefile | 1 + drivers/usb/misc/usb5744.c | 115 +++++++++++++++++++++++++++++++++++++ 4 files changed, 126 insertions(+) create mode 100644 drivers/usb/misc/usb5744.c diff --git a/MAINTAINERS b/MAINTAINERS index 7439471b5d37..56d1fcdd24f6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2706,6 +2706,7 @@ F: drivers/edac/synopsys_edac.c F: drivers/i2c/busses/i2c-cadence.c F: drivers/i2c/busses/i2c-xiic.c F: drivers/mmc/host/sdhci-of-arasan.c +F: drivers/usb/misc/usb5744.c N: zynq N: xilinx diff --git a/drivers/usb/misc/Kconfig b/drivers/usb/misc/Kconfig index 8f1144359012..30335b5c4f88 100644 --- a/drivers/usb/misc/Kconfig +++ b/drivers/usb/misc/Kconfig @@ -242,6 +242,15 @@ config USB_HUB_USB251XB parameters may be set in devicetree or platform data. Say Y or M here if you need to configure such a device via SMBus. +config USB_USB5744 + tristate "Microchip USB5744 Hub driver" + depends on I2C + depends on GPIOLIB + help + This option enables support for Microchip USB5744 Hub. This driver + optionally reset the hub using gpio pin and configure hub via i2c if + connected. + config USB_HSIC_USB3503 tristate "USB3503 HSIC to USB20 Driver" depends on I2C diff --git a/drivers/usb/misc/Makefile b/drivers/usb/misc/Makefile index 5f4e598573ab..5920146a506a 100644 --- a/drivers/usb/misc/Makefile +++ b/drivers/usb/misc/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_USB_USS720) += uss720.o obj-$(CONFIG_USB_SEVSEG) += usbsevseg.o obj-$(CONFIG_USB_YUREX) += yurex.o obj-$(CONFIG_USB_HUB_USB251XB) += usb251xb.o +obj-$(CONFIG_USB_USB5744) += usb5744.o obj-$(CONFIG_USB_HSIC_USB3503) += usb3503.o obj-$(CONFIG_USB_HSIC_USB4604) += usb4604.o obj-$(CONFIG_USB_CHAOSKEY) += chaoskey.o diff --git a/drivers/usb/misc/usb5744.c b/drivers/usb/misc/usb5744.c new file mode 100644 index 000000000000..729b76345c69 --- /dev/null +++ b/drivers/usb/misc/usb5744.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for the Microchip USB5744 4-port hub. + * + * Copyright (c) 2021 Xilinx, Inc. + */ + +#include +#include +#include +#include +#include +#include +#include + +static int usb5744_init_hw(struct device *dev) +{ + struct gpio_desc *reset_gpio; + + reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(reset_gpio)) { + dev_err(dev, "Failed to bind reset gpio"); + return -ENODEV; + } + + if (reset_gpio) { + /* Toggle RESET_N to reset the hub. */ + gpiod_set_value(reset_gpio, 0); + usleep_range(5, 20); /* trstia */ + gpiod_set_value(reset_gpio, 1); + usleep_range(5000, 10000); /* tcsh */ + } + + return 0; +} + +static int usb5744_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + int ret; + + /* Trigger gpio reset to the hub. */ + ret = usb5744_init_hw(dev); + if (ret) + return ret; + + /* Send SMBus command to boot hub. */ + ret = i2c_smbus_write_word_data(client, 0xAA, swab16(0x5600)); + if (ret < 0) + dev_err(dev, "Sending boot command failed"); + + return ret; +} + +static int usb5744_platform_probe(struct platform_device *pdev) +{ + /* Trigger gpio reset to the hub. */ + return usb5744_init_hw(&pdev->dev); +} + +static const struct i2c_device_id usb5744_id[] = { + { "usb5744", 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, usb5744_id); + +static struct i2c_driver usb5744_i2c_driver = { + .driver = { + .name = "usb5744", + }, + .probe = usb5744_i2c_probe, + .id_table = usb5744_id, +}; + +static const struct of_device_id usb5744_platform_id[] = { + { .compatible = "microchip,usb5744", }, + { } +}; + +static struct platform_driver usb5744_platform_driver = { + .driver = { + .name = "microchip,usb5744", + .of_match_table = usb5744_platform_id, + }, + .probe = usb5744_platform_probe, +}; + +static int __init usb5744_init(void) +{ + int err; + + err = i2c_add_driver(&usb5744_i2c_driver); + if (err != 0) + pr_err("usb5744: Failed to register I2C driver: %d\n", err); + + err = platform_driver_register(&usb5744_platform_driver); + if (err != 0) + pr_err("usb5744: Failed to register platform driver: %d\n", + err); + return 0; +} +module_init(usb5744_init); + +static void __exit usb5744_exit(void) +{ + platform_driver_unregister(&usb5744_platform_driver); + i2c_del_driver(&usb5744_i2c_driver); +} +module_exit(usb5744_exit); + +MODULE_AUTHOR("Piyush Mehta "); +MODULE_AUTHOR("Michal Simek "); +MODULE_DESCRIPTION("USB5744 Hub"); +MODULE_LICENSE("GPL v2");