From patchwork Mon Oct 21 13:13:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 177076 Delivered-To: patch@linaro.org Received: by 2002:a92:409a:0:0:0:0:0 with SMTP id d26csp3404147ill; Mon, 21 Oct 2019 06:14:20 -0700 (PDT) X-Google-Smtp-Source: APXvYqz7cv8A7RzXEM9+YvNRCvAd/Mfba3hJszEA3x/1euWcOY+v9mTBAyySCrFRdsmlRQYvrT/D X-Received: by 2002:a17:906:80c1:: with SMTP id a1mr22200516ejx.37.1571663660808; Mon, 21 Oct 2019 06:14:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1571663660; cv=none; d=google.com; s=arc-20160816; b=r00cVxHC2Bo1Y2SgUQMWB8XbPb8WVRGMsev2VvEEkU/Ssy9MUqfwB/GqFUvlCxvK29 qBufruZOilDloQaq4+W1VW91uQMRM6Tj5Jwir9LIs34sXnq6cU1heEPQ0IiN9zz3iG6i VG4jlgI7smjoEaWqJOxLNYSjQDjDNRMG/llE04PCkVD6hszxPV9XQohR3IgZhyCvDens 4BLY/dANdC2+4FPvI6eAgQzPpt/pEpian5HN1Hg1w54du37fF9H8rBFYkHXU94DVEUCe 137YMZQ+OaCWjoQxH/SSVI5mE+FwMReIl4fOBX6rDmTH6iMh+DMi3tCKhhnbbQiXcX2S 2lzQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=f+6GI+LbBw1WuyNQvMxFbFdVBF7LdvDUjpMd4xYGnqM=; b=XwgoKiPugM+4v8WRh4Ve4mvaz6ES6t6buUVd3hfKXJEX5Tc2xMFPDlFMqaLCSIRbtl 95dVRlDbsWK4rxIN5EdM7xkO373P47c+EXfeJImMr1iHbOoFnSXWg5PpcoBsPd8UM54m Ie6StMpGK1RFY8Axqqha1uv5eSDxOz7yNMDynpPTiburWx5TJ+jjQs2PTyNADqnWXmBH /dTwJRidS/g8PkOG0mtkyg/C00mL+SKg+b+D4JrNoA9O/23S4vic1pMMPd3t2KR9XXPQ 7fqmtut7284FPcAbl4VIK42tvF2gpmt2qCKLygOkgMHYjCTaZwfZHmcb6dIZzGQ3nPbi ZojQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=xTBJZmcq; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id b34si4073495edc.74.2019.10.21.06.14.20; Mon, 21 Oct 2019 06:14:20 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=xTBJZmcq; spf=pass (google.com: best guess record for domain of devicetree-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728841AbfJUNOU (ORCPT + 8 others); Mon, 21 Oct 2019 09:14:20 -0400 Received: from lelv0142.ext.ti.com ([198.47.23.249]:39742 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728840AbfJUNOT (ORCPT ); Mon, 21 Oct 2019 09:14:19 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id x9LDE7B7121513; Mon, 21 Oct 2019 08:14:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1571663647; bh=f+6GI+LbBw1WuyNQvMxFbFdVBF7LdvDUjpMd4xYGnqM=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=xTBJZmcq3JHguGr+gKHCjoUWXk0AlGOFPaWyzEmaZXij/VNZylV0qxEEftAFZqg9P eNUY65990ua/O0deR3YS35BgOcbqyS3kddeou8HI1AhK/ctRJPS3G6oq645xLiUm/4 l3X6RRA3zsd2UoWquoFkpUSpO6EHZLCm5uy+vElk= Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x9LDDbhm105997 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 21 Oct 2019 08:13:37 -0500 Received: from DLEE112.ent.ti.com (157.170.170.23) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Mon, 21 Oct 2019 08:13:27 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Mon, 21 Oct 2019 08:13:27 -0500 Received: from lta0400828a.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id x9LDDE7g017365; Mon, 21 Oct 2019 08:13:19 -0500 From: Roger Quadros To: , CC: , , , , , , , Roger Quadros Subject: [PATCH v2 2/2] usb: cdns3: Add TI specific wrapper driver Date: Mon, 21 Oct 2019 16:13:05 +0300 Message-ID: <20191021131305.8689-3-rogerq@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191021131305.8689-1-rogerq@ti.com> References: <20191021131305.8689-1-rogerq@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The J721e platform comes with 2 Cadence USB3 controller instances. This driver supports the TI specific wrapper on this platform. Signed-off-by: Roger Quadros Signed-off-by: Sekhar Nori --- drivers/usb/cdns3/Kconfig | 10 ++ drivers/usb/cdns3/Makefile | 1 + drivers/usb/cdns3/cdns3-ti.c | 236 +++++++++++++++++++++++++++++++++++ 3 files changed, 247 insertions(+) create mode 100644 drivers/usb/cdns3/cdns3-ti.c -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig index d0331613a355..2a1e89d12ed9 100644 --- a/drivers/usb/cdns3/Kconfig +++ b/drivers/usb/cdns3/Kconfig @@ -43,4 +43,14 @@ config USB_CDNS3_PCI_WRAP If you choose to build this driver as module it will be dynamically linked and module will be called cdns3-pci.ko +config USB_CDNS3_TI + tristate "Cadence USB3 support on TI platforms" + depends on ARCH_K3 || COMPILE_TEST + default USB_CDNS3 + help + Say 'Y' or 'M' here if you are building for Texas Instruments + platforms that contain Cadence USB3 controller core. + + e.g. J721e. + endif diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile index a703547350bb..948e6b88d1a9 100644 --- a/drivers/usb/cdns3/Makefile +++ b/drivers/usb/cdns3/Makefile @@ -14,3 +14,4 @@ endif cdns3-$(CONFIG_USB_CDNS3_HOST) += host.o obj-$(CONFIG_USB_CDNS3_PCI_WRAP) += cdns3-pci-wrap.o +obj-$(CONFIG_USB_CDNS3_TI) += cdns3-ti.o diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c new file mode 100644 index 000000000000..5541cba71965 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-ti.c @@ -0,0 +1,236 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * cdns_ti-ti.c - TI specific Glue layer for Cadence USB Controller + * + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* USB Wrapper register offsets */ +#define USBSS_PID 0x0 +#define USBSS_W1 0x4 +#define USBSS_STATIC_CONFIG 0x8 +#define USBSS_PHY_TEST 0xc +#define USBSS_DEBUG_CTRL 0x10 +#define USBSS_DEBUG_INFO 0x14 +#define USBSS_DEBUG_LINK_STATE 0x18 +#define USBSS_DEVICE_CTRL 0x1c + +/* Wrapper 1 register bits */ +#define USBSS_W1_PWRUP_RST BIT(0) +#define USBSS_W1_OVERCURRENT_SEL BIT(8) +#define USBSS_W1_MODESTRAP_SEL BIT(9) +#define USBSS_W1_OVERCURRENT BIT(16) +#define USBSS_W1_MODESTRAP_MASK GENMASK(18, 17) +#define USBSS_W1_MODESTRAP_SHIFT 17 +#define USBSS_W1_USB2_ONLY BIT(19) + +/* Static config register bits */ +#define USBSS1_STATIC_PLL_REF_SEL_MASK GENMASK(8, 5) +#define USBSS1_STATIC_PLL_REF_SEL_SHIFT 5 +#define USBSS1_STATIC_LOOPBACK_MODE_MASK GENMASK(4, 3) +#define USBSS1_STATIC_LOOPBACK_MODE_SHIFT 3 +#define USBSS1_STATIC_VBUS_SEL_MASK GENMASK(2, 1) +#define USBSS1_STATIC_VBUS_SEL_SHIFT 1 +#define USBSS1_STATIC_LANE_REVERSE BIT(0) + +/* Modestrap modes */ +enum modestrap_mode { USBSS_MODESTRAP_MODE_NONE, + USBSS_MODESTRAP_MODE_HOST, + USBSS_MODESTRAP_MODE_PERIPHERAL}; + +struct cdns_ti { + struct device *dev; + void __iomem *usbss; + int usb2_only:1; + int vbus_divider:1; + struct clk *usb2_refclk; + struct clk *lpm_clk; +}; + +static const int cdns_ti_rate_table[] = { /* in KHZ */ + 9600, + 10000, + 12000, + 19200, + 20000, + 24000, + 25000, + 26000, + 38400, + 40000, + 58000, + 50000, + 52000, +}; + +static inline u32 cdns_ti_readl(struct cdns_ti *data, u32 offset) +{ + return readl(data->usbss + offset); +} + +static inline void cdns_ti_writel(struct cdns_ti *data, u32 offset, u32 value) +{ + writel(value, data->usbss + offset); +} + +static int cdns_ti_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = pdev->dev.of_node; + struct cdns_ti *data; + struct resource *res; + int error; + u32 reg; + int rate_code, i; + unsigned long rate; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + platform_set_drvdata(pdev, data); + + data->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->usbss = devm_ioremap_resource(dev, res); + if (IS_ERR(data->usbss)) + return PTR_ERR(data->usbss); + + data->usb2_refclk = devm_clk_get(dev, "ref"); + if (IS_ERR(data->usb2_refclk)) { + dev_err(dev, "can't get usb2_refclk\n"); + return PTR_ERR(data->usb2_refclk); + } + + data->lpm_clk = devm_clk_get(dev, "lpm"); + if (IS_ERR(data->lpm_clk)) { + dev_err(dev, "can't get lpm_clk\n"); + return PTR_ERR(data->lpm_clk); + } + + rate = clk_get_rate(data->usb2_refclk); + rate /= 1000; /* To KHz */ + for (i = 0; i < ARRAY_SIZE(cdns_ti_rate_table); i++) { + if (cdns_ti_rate_table[i] == rate) + break; + } + + if (i == ARRAY_SIZE(cdns_ti_rate_table)) { + dev_err(dev, "unsupported usb2_refclk rate: %lu KHz\n", rate); + return -EINVAL; + } + + rate_code = i; + + pm_runtime_enable(dev); + error = pm_runtime_get_sync(dev); + if (error < 0) { + dev_err(dev, "pm_runtime_get_sync failed: %d\n", error); + goto err_get; + } + + /* assert RESET */ + reg = cdns_ti_readl(data, USBSS_W1); + reg &= ~USBSS_W1_PWRUP_RST; + cdns_ti_writel(data, USBSS_W1, reg); + + /* set static config */ + reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG); + reg &= ~USBSS1_STATIC_PLL_REF_SEL_MASK; + reg |= rate_code << USBSS1_STATIC_PLL_REF_SEL_SHIFT; + + reg &= ~USBSS1_STATIC_VBUS_SEL_MASK; + data->vbus_divider = device_property_read_bool(dev, "ti,vbus-divider"); + if (data->vbus_divider) + reg |= 1 << USBSS1_STATIC_VBUS_SEL_SHIFT; + + cdns_ti_writel(data, USBSS_STATIC_CONFIG, reg); + reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG); + + /* set USB2_ONLY mode if requested */ + reg = cdns_ti_readl(data, USBSS_W1); + data->usb2_only = device_property_read_bool(dev, "ti,usb2-only"); + if (data->usb2_only) + reg |= USBSS_W1_USB2_ONLY; + + /* set default modestrap */ + reg |= USBSS_W1_MODESTRAP_SEL; + reg &= ~USBSS_W1_MODESTRAP_MASK; + reg |= USBSS_MODESTRAP_MODE_NONE << USBSS_W1_MODESTRAP_SHIFT; + cdns_ti_writel(data, USBSS_W1, reg); + + /* de-assert RESET */ + reg |= USBSS_W1_PWRUP_RST; + cdns_ti_writel(data, USBSS_W1, reg); + + error = of_platform_populate(node, NULL, NULL, dev); + if (error) { + dev_err(dev, "failed to create children: %d\n", error); + goto err; + } + + return 0; + +err: + pm_runtime_put_sync(data->dev); +err_get: + pm_runtime_disable(data->dev); + + return error; +} + +static int cdns_ti_remove_core(struct device *dev, void *c) +{ + struct platform_device *pdev = to_platform_device(dev); + + platform_device_unregister(pdev); + + return 0; +} + +static int cdns_ti_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + device_for_each_child(dev, NULL, cdns_ti_remove_core); + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static const struct of_device_id cdns_ti_of_match[] = { + { .compatible = "ti,j721e-usb", }, + {}, +}; +MODULE_DEVICE_TABLE(of, cdns_ti_of_match); + +static struct platform_driver cdns_ti_driver = { + .probe = cdns_ti_probe, + .remove = cdns_ti_remove, + .driver = { + .name = "cdns3-ti", + .of_match_table = cdns_ti_of_match, + }, +}; + +module_platform_driver(cdns_ti_driver); + +MODULE_ALIAS("platform:cdns3-ti"); +MODULE_AUTHOR("Roger Quadros "); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Cadence USB3 TI Glue Layer");