From patchwork Thu Apr 6 01:52:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Minda Chen X-Patchwork-Id: 13202789 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 849B9C77B71 for ; Thu, 6 Apr 2023 01:53:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=B+rSPQhNEEUMXidpJ8wZVvw0VOmWzbIhCl2rS/7ctUs=; b=e9piiGI7PyojYo P5QJEb+TS9jAKdo2TtIfK1lxGW3nkG7KC2PeNNvMNXN0dlqR8b3FodqtNaNDcBm/SqMs8AO95MEcA VVgBBsI9bukGFupfGQNpyFapDyIrTdkdetby3+8RPqVQsJRxWg4oz5dAro940IDMnFa+SxyeTSUR0 ajj3mT5We2IwrUwtZ3FgvH38wWsnFC/hUGBrlLz+Rl4dd2ggJYUJQosa4t2PcOHAXGtljpibRe52x sfJzYXG0FEViQ0uMejvQTbRP5iWydG9URy0LwKhQ86BEt871CyL+6TtQwrIucxw684fHrsCFyVrlK F8gm+vRFk626yIHwerYg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pkEoC-00655X-20; Thu, 06 Apr 2023 01:53:04 +0000 Received: from fd01.gateway.ufhost.com ([61.152.239.71]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pkEo7-0064vk-1j; Thu, 06 Apr 2023 01:53:01 +0000 Received: from EXMBX166.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX166", Issuer "EXMBX166" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id 4A66024E20D; Thu, 6 Apr 2023 09:52:25 +0800 (CST) Received: from EXMBX171.cuchost.com (172.16.6.91) by EXMBX166.cuchost.com (172.16.6.76) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Thu, 6 Apr 2023 09:52:25 +0800 Received: from ubuntu.localdomain (183.27.97.179) by EXMBX171.cuchost.com (172.16.6.91) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Thu, 6 Apr 2023 09:52:24 +0800 From: Minda Chen To: Emil Renner Berthing , Conor Dooley , Vinod Koul , Kishon Vijay Abraham I , Rob Herring , Krzysztof Kozlowski , Pawel Laszczak , Greg Kroah-Hartman , Peter Chen , Roger Quadros , Philipp Zabel CC: , , , , , Paul Walmsley , Palmer Dabbelt , Albert Ou , "Minda Chen" , Mason Huo Subject: [PATCH v4 6/7] usb: cdns3: add StarFive JH7110 USB driver. Date: Thu, 6 Apr 2023 09:52:15 +0800 Message-ID: <20230406015216.27034-7-minda.chen@starfivetech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230406015216.27034-1-minda.chen@starfivetech.com> References: <20230406015216.27034-1-minda.chen@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [183.27.97.179] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX171.cuchost.com (172.16.6.91) X-YovoleRuleAgent: yovoleflag X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230405_185259_989862_F8F4E15D X-CRM114-Status: GOOD ( 28.01 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Adds Specific Glue layer to support USB peripherals on StarFive JH7110 SoC. There is a Cadence USB3 core for JH7110 SoCs, the cdns core is the child of this USB wrapper module device. Signed-off-by: Minda Chen --- MAINTAINERS | 7 + drivers/usb/cdns3/Kconfig | 11 + drivers/usb/cdns3/Makefile | 1 + drivers/usb/cdns3/cdns3-starfive.c | 378 +++++++++++++++++++++++++++++ drivers/usb/cdns3/core.h | 3 + 5 files changed, 400 insertions(+) create mode 100644 drivers/usb/cdns3/cdns3-starfive.c diff --git a/MAINTAINERS b/MAINTAINERS index d98b70d62fd4..0610bbf921bb 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19977,6 +19977,13 @@ F: Documentation/devicetree/bindings/phy/starfive,jh7110-usb-phy.yaml F: drivers/phy/starfive/phy-jh7110-pcie.c F: drivers/phy/starfive/phy-jh7110-usb.c +STARFIVE JH71X0 USB DRIVERS +M: Emil Renner Berthing +M: Minda Chen +S: Maintained +F: Documentation/devicetree/bindings/usb/starfive,jh7110-usb.yaml +F: drivers/usb/cdns3/cdns3-starfive.c + STATIC BRANCH/CALL M: Peter Zijlstra M: Josh Poimboeuf diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig index b98ca0a1352a..0a514b591527 100644 --- a/drivers/usb/cdns3/Kconfig +++ b/drivers/usb/cdns3/Kconfig @@ -78,6 +78,17 @@ config USB_CDNS3_IMX For example, imx8qm and imx8qxp. +config USB_CDNS3_STARFIVE + tristate "Cadence USB3 support on StarFive SoC platforms" + depends on ARCH_STARFIVE || COMPILE_TEST + help + Say 'Y' or 'M' here if you are building for StarFive SoCs + platforms that contain Cadence USB3 controller core. + + e.g. JH7110. + + If you choose to build this driver as module it will + be dynamically linked and module will be called cdns3-starfive.ko endif if USB_CDNS_SUPPORT diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile index 61edb2f89276..48dfae75b5aa 100644 --- a/drivers/usb/cdns3/Makefile +++ b/drivers/usb/cdns3/Makefile @@ -24,6 +24,7 @@ endif obj-$(CONFIG_USB_CDNS3_PCI_WRAP) += cdns3-pci-wrap.o obj-$(CONFIG_USB_CDNS3_TI) += cdns3-ti.o obj-$(CONFIG_USB_CDNS3_IMX) += cdns3-imx.o +obj-$(CONFIG_USB_CDNS3_STARFIVE) += cdns3-starfive.o cdnsp-udc-pci-y := cdnsp-pci.o diff --git a/drivers/usb/cdns3/cdns3-starfive.c b/drivers/usb/cdns3/cdns3-starfive.c new file mode 100644 index 000000000000..925209a97bf9 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-starfive.c @@ -0,0 +1,378 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * cdns3-starfive.c - StarFive specific Glue layer for Cadence USB Controller + * + * Copyright (C) 2022 Starfive, Inc. + * Author: Yanhong Wang + * Author: Mason Huo + * Author: Minda Chen + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "core.h" + +#define USB_STRAP_HOST BIT(17) +#define USB_STRAP_DEVICE BIT(18) +#define USB_STRAP_MASK GENMASK(18, 16) + +#define USB_SUSPENDM_HOST BIT(19) +#define USB_SUSPENDM_MASK BIT(19) +#define CDNS_IRQ_WAKEUP_INDEX 3 + +struct cdns_starfive { + struct device *dev; + struct phy *usb2_phy; + struct phy *usb3_phy; + struct regmap *stg_syscon; + struct reset_control *resets; + struct clk_bulk_data *clks; + int num_clks; + enum phy_mode phy_mode; + u32 stg_usb_mode; +}; + +static int set_phy_power_on(struct cdns_starfive *data) +{ + int ret; + + ret = phy_power_on(data->usb2_phy); + if (ret) + return ret; + + ret = phy_power_on(data->usb3_phy); + if (ret) + phy_power_off(data->usb2_phy); + + return ret; +} + +static void set_phy_power_off(struct cdns_starfive *data) +{ + phy_power_off(data->usb3_phy); + phy_power_off(data->usb2_phy); +} + +static void cdns_mode_init(struct platform_device *pdev, + struct cdns_starfive *data) +{ + enum usb_dr_mode mode; + + mode = usb_get_dr_mode(&pdev->dev); + + switch (mode) { + case USB_DR_MODE_HOST: + regmap_update_bits(data->stg_syscon, + data->stg_usb_mode, + USB_STRAP_MASK, + USB_STRAP_HOST); + regmap_update_bits(data->stg_syscon, + data->stg_usb_mode, + USB_SUSPENDM_MASK, + USB_SUSPENDM_HOST); + data->phy_mode = PHY_MODE_USB_HOST; + break; + + case USB_DR_MODE_PERIPHERAL: + regmap_update_bits(data->stg_syscon, data->stg_usb_mode, + USB_STRAP_MASK, USB_STRAP_DEVICE); + regmap_update_bits(data->stg_syscon, data->stg_usb_mode, + USB_SUSPENDM_MASK, 0); + data->phy_mode = PHY_MODE_USB_DEVICE; + break; + + case USB_DR_MODE_OTG: + data->phy_mode = PHY_MODE_USB_OTG; + default: + break; + } +} + +static int cdns_clk_rst_init(struct cdns_starfive *data) +{ + int ret; + + data->num_clks = devm_clk_bulk_get_all(data->dev, &data->clks); + if (data->num_clks < 0) + return dev_err_probe(data->dev, -ENODEV, + "Failed to get clocks\n"); + + data->resets = devm_reset_control_array_get_exclusive(data->dev); + if (IS_ERR(data->resets)) { + return dev_err_probe(data->dev, PTR_ERR(data->resets), + "Failed to get resets"); + } + + ret = clk_bulk_prepare_enable(data->num_clks, data->clks); + if (ret) + return dev_err_probe(data->dev, ret, + "failed to enable clocks\n"); + + ret = reset_control_deassert(data->resets); + if (ret) { + ret = dev_err_probe(data->dev, ret, + "failed to reset clocks\n"); + goto err_clk_init; + } + + return ret; + +err_clk_init: + clk_bulk_disable_unprepare(data->num_clks, data->clks); + return ret; +} + +static int cdns3_starfive_phy_init(struct device *dev, struct cdns_starfive *data) +{ + int ret; + + ret = phy_init(data->usb2_phy); + if (ret) + return ret; + + ret = phy_init(data->usb3_phy); + if (ret) + goto err_phy3_init; + + ret = set_phy_power_on(data); + if (ret) + goto err_phy_power_on; + + phy_set_mode(data->usb2_phy, data->phy_mode); + phy_set_mode(data->usb3_phy, data->phy_mode); + + return 0; + +err_phy_power_on: + phy_exit(data->usb3_phy); +err_phy3_init: + phy_exit(data->usb2_phy); + return ret; +} + +static int cdns3_starfive_platform_device_add(struct platform_device *pdev, + struct cdns_starfive *data) +{ + struct platform_device *cdns3; + struct resource cdns_res[CDNS_RESOURCES_NUM], *res; + struct device *dev = &pdev->dev; + const char *reg_name[CDNS_IOMEM_RESOURCES_NUM] = {"otg", "xhci", "dev"}; + const char *irq_name[CDNS_IRQ_RESOURCES_NUM] = {"host", "peripheral", "otg", "wakeup"}; + int i, ret, res_idx = 0; + + cdns3 = platform_device_alloc("cdns-usb3", PLATFORM_DEVID_AUTO); + if (!cdns3) + return dev_err_probe(dev, -ENOMEM, + "couldn't alloc cdns3 usb device\n"); + + cdns3->dev.parent = dev; + memset(cdns_res, 0, sizeof(cdns_res)); + + for (i = 0; i < CDNS_IOMEM_RESOURCES_NUM; i++) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, reg_name[i]); + if (!res) { + ret = dev_err_probe(dev, + -ENXIO, "couldn't get %s reg resource\n", reg_name[i]); + goto free_memory; + } + cdns_res[res_idx] = *res; + res_idx++; + } + + for (i = 0; i < CDNS_IRQ_RESOURCES_NUM; i++) { + if (i == CDNS_IRQ_WAKEUP_INDEX) { + ret = platform_get_irq_byname_optional(pdev, irq_name[i]); + if (ret < 0) + continue; + } else { + ret = platform_get_irq_byname(pdev, irq_name[i]); + if (ret < 0) { + dev_err(dev, "couldn't get %s irq\n", irq_name[i]); + goto free_memory; + } + } + cdns_res[res_idx].start = ret; + cdns_res[res_idx].end = ret; + cdns_res[res_idx].flags = IORESOURCE_IRQ; + cdns_res[res_idx].name = irq_name[i]; + res_idx++; + } + + ret = platform_device_add_resources(cdns3, cdns_res, res_idx); + if (ret) { + dev_err(dev, "couldn't add res to cdns3 device\n"); + goto free_memory; + } + + ret = platform_device_add(cdns3); + if (ret) { + dev_err(dev, "failed to register cdns3 device\n"); + goto free_memory; + } + + return ret; +free_memory: + platform_device_put(cdns3); + return ret; +} + +static int cdns_starfive_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct cdns_starfive *data; + unsigned int args; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + platform_set_drvdata(pdev, data); + + data->dev = dev; + + data->stg_syscon = syscon_regmap_lookup_by_phandle_args(pdev->dev.of_node, + "starfive,stg-syscon", 1, &args); + + if (IS_ERR(data->stg_syscon)) + return dev_err_probe(dev, PTR_ERR(data->stg_syscon), + "Failed to parse starfive,stg-syscon\n"); + + data->stg_usb_mode = args; + + cdns_mode_init(pdev, data); + + ret = cdns_clk_rst_init(data); + if (ret) + return ret; + + data->usb2_phy = devm_phy_optional_get(dev, "usb2-phy"); + if (IS_ERR(data->usb2_phy)) + return dev_err_probe(dev, PTR_ERR(data->usb2_phy), + "Failed to parse usb2 phy\n"); + + data->usb3_phy = devm_phy_optional_get(dev, "usb3-phy"); + if (IS_ERR(data->usb3_phy)) + return dev_err_probe(dev, PTR_ERR(data->usb3_phy), + "Failed to parse usb3 phy\n"); + + cdns3_starfive_phy_init(dev, data); + + ret = cdns3_starfive_platform_device_add(pdev, data); + if (ret) { + set_phy_power_off(data); + phy_exit(data->usb3_phy); + phy_exit(data->usb2_phy); + reset_control_assert(data->resets); + clk_bulk_disable_unprepare(data->num_clks, data->clks); + return dev_err_probe(dev, ret, "Failed to create children\n"); + } + + device_set_wakeup_capable(dev, true); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + dev_info(dev, "usb mode %d probe success\n", data->phy_mode); + + return 0; +} + +static int cdns_starfive_remove_core(struct device *dev, void *c) +{ + struct platform_device *pdev = to_platform_device(dev); + + platform_device_unregister(pdev); + + return 0; +} + +static int cdns_starfive_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct cdns_starfive *data = dev_get_drvdata(dev); + + pm_runtime_get_sync(dev); + device_for_each_child(dev, NULL, cdns_starfive_remove_core); + + set_phy_power_off(data); + phy_exit(data->usb2_phy); + phy_exit(data->usb3_phy); + + reset_control_assert(data->resets); + clk_bulk_disable_unprepare(data->num_clks, data->clks); + pm_runtime_disable(dev); + pm_runtime_put_noidle(dev); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int cdns_starfive_resume(struct device *dev) +{ + struct cdns_starfive *data = dev_get_drvdata(dev); + int ret; + + ret = clk_bulk_prepare_enable(data->num_clks, data->clks); + if (ret) + return ret; + + ret = reset_control_deassert(data->resets); + if (ret) + return ret; + + ret = cdns3_starfive_phy_init(dev, data); + + return ret; +} + +static int cdns_starfive_suspend(struct device *dev) +{ + struct cdns_starfive *data = dev_get_drvdata(dev); + + set_phy_power_off(data); + phy_exit(data->usb2_phy); + phy_exit(data->usb3_phy); + reset_control_assert(data->resets); + clk_bulk_disable_unprepare(data->num_clks, data->clks); + + return 0; +} +#endif + +static const struct dev_pm_ops cdns_starfive_pm_ops = { + SET_RUNTIME_PM_OPS(cdns_starfive_suspend, cdns_starfive_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(cdns_starfive_suspend, cdns_starfive_resume) +}; + +static const struct of_device_id cdns_starfive_of_match[] = { + { .compatible = "starfive,jh7110-usb", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, cdns_starfive_of_match); + +static struct platform_driver cdns_starfive_driver = { + .probe = cdns_starfive_probe, + .remove = cdns_starfive_remove, + .driver = { + .name = "cdns3-starfive", + .of_match_table = cdns_starfive_of_match, + .pm = &cdns_starfive_pm_ops, + }, +}; +module_platform_driver(cdns_starfive_driver); + +MODULE_ALIAS("platform:cdns3-starfive"); +MODULE_AUTHOR("YanHong Wang "); +MODULE_AUTHOR("Mason Huo "); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Cadence USB3 StarFive Glue Layer"); diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h index 2d332a788871..8d44ab504898 100644 --- a/drivers/usb/cdns3/core.h +++ b/drivers/usb/cdns3/core.h @@ -38,6 +38,9 @@ struct cdns_role_driver { }; #define CDNS_XHCI_RESOURCES_NUM 2 +#define CDNS_IOMEM_RESOURCES_NUM 3 +#define CDNS_IRQ_RESOURCES_NUM 4 +#define CDNS_RESOURCES_NUM (CDNS_IOMEM_RESOURCES_NUM + CDNS_IRQ_RESOURCES_NUM) struct cdns3_platform_data { int (*platform_suspend)(struct device *dev,