From patchwork Thu Jun 7 14:58:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Fishman X-Patchwork-Id: 926361 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 411ph24qLdz9s71 for ; Fri, 8 Jun 2018 01:03:14 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 411ph22lGZzF34M for ; Fri, 8 Jun 2018 01:03:14 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com X-Original-To: openbmc@lists.ozlabs.org Delivered-To: openbmc@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=nuvoton.com (client-ip=212.199.177.27; helo=herzl.nuvoton.co.il; envelope-from=avi.fishman@nuvoton.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Received: from herzl.nuvoton.co.il (212.199.177.27.static.012.net.il [212.199.177.27]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 411pdh70LTzF34J for ; Fri, 8 Jun 2018 01:01:12 +1000 (AEST) Received: from taln60.nuvoton.co.il (ntil-fw [212.199.177.25]) by herzl.nuvoton.co.il (8.13.8/8.13.8) with ESMTP id w57EwNa0019458; Thu, 7 Jun 2018 17:58:24 +0300 Received: by taln60.nuvoton.co.il (Postfix, from userid 8441) id A428962FC8; Thu, 7 Jun 2018 17:58:23 +0300 (IDT) From: avifishman70@gmail.com To: gregkh@linuxfoundation.org, stern@rowland.harvard.edu Subject: [PATCH v4 1/3] USB host: Add USB ehci support for nuvoton npcm7xx platform Date: Thu, 7 Jun 2018 17:58:19 +0300 Message-Id: <20180607145821.322979-2-avifishman70@gmail.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180607145821.322979-1-avifishman70@gmail.com> References: <20180607145821.322979-1-avifishman70@gmail.com> X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kstewart@linuxfoundation.org, mark.rutland@arm.com, tmaimon77@gmail.com, tony@atomide.com, jhogan@kernel.org, brendanhiggins@google.com, bjorn.andersson@linaro.org, albeu@free.fr, digetx@gmail.com, openbmc@lists.ozlabs.org, elder@linaro.org, chunfeng.yun@mediatek.com, devicetree@vger.kernel.org, hdegoede@redhat.com, robh+dt@kernel.org, mathias.nyman@linux.intel.com, Avi Fishman , venture@google.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, baolu.lu@linux.intel.com Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" From: Avi Fishman This patch adds support for ehci controller for the Nuvoton npcm7xx platform. Most of the code was taken from ehci-spear.c + specific initialization code Signed-off-by: Avi Fishman --- drivers/usb/host/Kconfig | 8 ++ drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-npcm7xx.c | 212 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 221 insertions(+) create mode 100644 drivers/usb/host/ehci-npcm7xx.c diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 9f0aeb068acb..e3100b249f0f 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -185,6 +185,14 @@ config USB_EHCI_MXC ---help--- Variation of ARC USB block used in some Freescale chips. +config USB_EHCI_HCD_NPCM7XX + tristate "Support for Nuvoton NPCM7XX on-chip EHCI USB controller" + depends on (USB_EHCI_HCD && ARCH_NPCM7XX) || COMPILE_TEST + default y + help + Enables support for the on-chip EHCI controller on + Nuvoton NPCM7XX chips. + config USB_EHCI_HCD_OMAP tristate "EHCI support for OMAP3 and later chips" depends on ARCH_OMAP diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 8a8cffe0b445..fcf5dab5efa4 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o obj-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o obj-$(CONFIG_USB_EHCI_HCD_PLATFORM) += ehci-platform.o obj-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o +obj-$(CONFIG_USB_EHCI_HCD_NPCM7XX) += ehci-npcm7xx.o obj-$(CONFIG_USB_EHCI_HCD_OMAP) += ehci-omap.o obj-$(CONFIG_USB_EHCI_HCD_ORION) += ehci-orion.o obj-$(CONFIG_USB_EHCI_HCD_SPEAR) += ehci-spear.o diff --git a/drivers/usb/host/ehci-npcm7xx.c b/drivers/usb/host/ehci-npcm7xx.c new file mode 100644 index 000000000000..c80a8792d3b0 --- /dev/null +++ b/drivers/usb/host/ehci-npcm7xx.c @@ -0,0 +1,212 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Nuvoton NPCM7xx driver for EHCI HCD + * + * Copyright (C) 2018 Nuvoton Technologies, + * Avi Fishman + * Tomer Maimon + * + * Based on various ehci-spear.c driver + */ + + +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "ehci.h" + +#include +#include + +#define DRIVER_DESC "EHCI npcm7xx driver" + +static const char hcd_name[] = "npcm7xx-ehci"; + +#define USB2PHYCTL_OFFSET 0x144 + +#define IPSRST2_OFFSET 0x24 +#define IPSRST3_OFFSET 0x34 + + +static struct hc_driver __read_mostly ehci_npcm7xx_hc_driver; + +#ifdef CONFIG_PM_SLEEP +static int ehci_npcm7xx_drv_suspend(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + bool do_wakeup = device_may_wakeup(dev); + + return ehci_suspend(hcd, do_wakeup); +} + +static int ehci_npcm7xx_drv_resume(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + + ehci_resume(hcd, false); + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(ehci_npcm7xx_pm_ops, ehci_npcm7xx_drv_suspend, + ehci_npcm7xx_drv_resume); + +static int npcm7xx_ehci_hcd_drv_probe(struct platform_device *pdev) +{ + struct usb_hcd *hcd; + struct resource *res; + struct regmap *gcr_regmap; + struct regmap *rst_regmap; + const struct hc_driver *driver = &ehci_npcm7xx_hc_driver; + int irq; + int retval; + + dev_dbg(&pdev->dev, "initializing npcm7xx ehci USB Controller\n"); + + gcr_regmap = syscon_regmap_lookup_by_compatible("nuvoton,npcm750-gcr"); + if (IS_ERR(gcr_regmap)) { + dev_err(&pdev->dev, "%s: failed to find nuvoton,npcm750-gcr\n", + __func__); + return IS_ERR(gcr_regmap); + } + + rst_regmap = syscon_regmap_lookup_by_compatible("nuvoton,npcm750-rst"); + if (IS_ERR(rst_regmap)) { + dev_err(&pdev->dev, "%s: failed to find nuvoton,npcm750-rst\n", + __func__); + return IS_ERR(rst_regmap); + } + + /********* phy init ******/ + // reset usb host + regmap_update_bits(rst_regmap, IPSRST2_OFFSET, + (0x1 << 26), (0x1 << 26)); + regmap_update_bits(rst_regmap, IPSRST3_OFFSET, + (0x1 << 25), (0x1 << 25)); + regmap_update_bits(gcr_regmap, USB2PHYCTL_OFFSET, + (0x1 << 28), 0); + + udelay(1); + + // enable phy + regmap_update_bits(rst_regmap, IPSRST3_OFFSET, + (0x1 << 25), 0); + + udelay(50); // enable phy + + regmap_update_bits(gcr_regmap, USB2PHYCTL_OFFSET, + (0x1 << 28), (0x1 << 28)); + + // enable host + regmap_update_bits(rst_regmap, IPSRST2_OFFSET, + (0x1 << 26), 0); + + if (usb_disabled()) + return -ENODEV; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + retval = irq; + goto fail; + } + + /* + * Right now device-tree probed devices don't get dma_mask set. + * Since shared usb code relies on it, set it here for now. + * Once we have dma capability bindings this can go away. + */ + retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (retval) + goto fail; + + hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); + if (!hcd) { + retval = -ENOMEM; + goto fail; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + hcd->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(hcd->regs)) { + retval = PTR_ERR(hcd->regs); + goto err_put_hcd; + } + hcd->rsrc_start = res->start; + hcd->rsrc_len = resource_size(res); + + /* registers start at offset 0x0 */ + hcd_to_ehci(hcd)->caps = hcd->regs; + + retval = usb_add_hcd(hcd, irq, IRQF_SHARED); + if (retval) + goto err_put_hcd; + + device_wakeup_enable(hcd->self.controller); + return retval; + +err_put_hcd: + usb_put_hcd(hcd); +fail: + dev_err(&pdev->dev, "init fail, %d\n", retval); + + return retval; +} + +static int npcm7xx_ehci_hcd_drv_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + usb_remove_hcd(hcd); + + usb_put_hcd(hcd); + + return 0; +} + +static const struct of_device_id npcm7xx_ehci_id_table[] = { + { .compatible = "nuvoton,npcm750-ehci" }, + { }, +}; +MODULE_DEVICE_TABLE(of, npcm7xx_ehci_id_table); + +static struct platform_driver npcm7xx_ehci_hcd_driver = { + .probe = npcm7xx_ehci_hcd_drv_probe, + .remove = npcm7xx_ehci_hcd_drv_remove, + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .name = "npcm7xx-ehci", + .bus = &platform_bus_type, + .pm = &ehci_npcm7xx_pm_ops, + .of_match_table = npcm7xx_ehci_id_table, + } +}; + +static int __init ehci_npcm7xx_init(void) +{ + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_DESC "\n", hcd_name); + + ehci_init_driver(&ehci_npcm7xx_hc_driver, NULL); + return platform_driver_register(&npcm7xx_ehci_hcd_driver); +} +module_init(ehci_npcm7xx_init); + +static void __exit ehci_npcm7xx_cleanup(void) +{ + platform_driver_unregister(&npcm7xx_ehci_hcd_driver); +} +module_exit(ehci_npcm7xx_cleanup); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_ALIAS("platform:npcm7xx-ehci"); +MODULE_AUTHOR("Avi Fishman"); +MODULE_LICENSE("GPL v2");