From patchwork Thu Apr 20 11:00:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Minda Chen X-Patchwork-Id: 676293 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2D13C7EE24 for ; Thu, 20 Apr 2023 11:05:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235241AbjDTLF1 (ORCPT ); Thu, 20 Apr 2023 07:05:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235283AbjDTLEf (ORCPT ); Thu, 20 Apr 2023 07:04:35 -0400 Received: from fd01.gateway.ufhost.com (fd01.gateway.ufhost.com [61.152.239.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71D9A9F; Thu, 20 Apr 2023 04:03:15 -0700 (PDT) Received: from EXMBX165.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX165", Issuer "EXMBX165" (not verified)) by fd01.gateway.ufhost.com (Postfix) with ESMTP id C14C124E1D1; Thu, 20 Apr 2023 19:00:59 +0800 (CST) Received: from EXMBX171.cuchost.com (172.16.6.91) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Thu, 20 Apr 2023 19:00:59 +0800 Received: from ubuntu.localdomain (113.72.144.253) by EXMBX171.cuchost.com (172.16.6.91) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Thu, 20 Apr 2023 19:00:58 +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 v5 6/7] usb: cdns3: Add StarFive JH7110 USB driver Date: Thu, 20 Apr 2023 19:00:51 +0800 Message-ID: <20230420110052.3182-7-minda.chen@starfivetech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230420110052.3182-1-minda.chen@starfivetech.com> References: <20230420110052.3182-1-minda.chen@starfivetech.com> MIME-Version: 1.0 X-Originating-IP: [113.72.144.253] X-ClientProxiedBy: EXCAS066.cuchost.com (172.16.6.26) To EXMBX171.cuchost.com (172.16.6.91) X-YovoleRuleAgent: yovoleflag Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.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 | 6 + drivers/usb/cdns3/Kconfig | 11 + drivers/usb/cdns3/Makefile | 1 + drivers/usb/cdns3/cdns3-starfive.c | 390 +++++++++++++++++++++++++++++ drivers/usb/cdns3/core.h | 3 + 5 files changed, 411 insertions(+) create mode 100644 drivers/usb/cdns3/cdns3-starfive.c diff --git a/MAINTAINERS b/MAINTAINERS index 8e0f755ba91b..3164a5cef6ee 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19976,6 +19976,12 @@ 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: 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..afe1c6652660 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-starfive.c @@ -0,0 +1,390 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * cdns3-starfive.c - StarFive specific Glue layer for Cadence USB Controller + * + * Copyright (C) 2023 StarFive Technology Co., Ltd. + * + * 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 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; + + 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) { + dev_err(data->dev, "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 void cdns_clk_rst_deinit(struct cdns_starfive *data) +{ + reset_control_assert(data->resets); + clk_bulk_disable_unprepare(data->num_clks, data->clks); +} + +static int cdns_starfive_phy_init(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; + + phy_set_mode(data->usb2_phy, data->phy_mode); + phy_set_mode(data->usb3_phy, data->phy_mode); + + ret = set_phy_power_on(data); + if (ret) + goto err_phy_power_on; + + return 0; + +err_phy_power_on: + phy_exit(data->usb3_phy); +err_phy3_init: + phy_exit(data->usb2_phy); + return ret; +} + +static void cdns_starfive_phy_deinit(struct cdns_starfive *data) +{ + phy_power_off(data->usb3_phy); + phy_power_off(data->usb2_phy); + phy_exit(data->usb3_phy); + phy_exit(data->usb2_phy); +} + +static int cdns_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; + + 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"); + + data->usb2_phy = devm_phy_optional_get(dev, "usb2"); + 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"); + if (IS_ERR(data->usb3_phy)) + return dev_err_probe(dev, PTR_ERR(data->usb3_phy), + "Failed to parse usb3 PHY\n"); + + cdns_mode_init(pdev, data); + + ret = cdns_clk_rst_init(data); + if (ret) + return ret; + + ret = cdns_starfive_phy_init(data); + if (ret) { + dev_err(dev, "Failed to init PHY\n"); + goto err_clk_init; + } + + ret = cdns_starfive_platform_device_add(pdev, data); + if (ret) { + dev_err(dev, "Failed to create children\n"); + goto err_phy_init; + } + + 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; + +err_phy_init: + cdns_starfive_phy_deinit(data); +err_clk_init: + cdns_clk_rst_deinit(data); + return ret; +} + +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); + + cdns_starfive_phy_deinit(data); + cdns_clk_rst_deinit(data); + 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) { + clk_bulk_disable_unprepare(data->num_clks, data->clks); + return ret; + } + + ret = cdns_starfive_phy_init(data); + if (ret) + cdns_clk_rst_deinit(data); + + return ret; +} + +static int cdns_starfive_suspend(struct device *dev) +{ + struct cdns_starfive *data = dev_get_drvdata(dev); + + cdns_starfive_phy_deinit(data); + cdns_clk_rst_deinit(data); + 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,