usb: cdns3: Add StarFive JH7110 USB driver
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 <minda.chen@starfivetech.com> Acked-by: Peter Chen <peter.chen@kernel.org> Reviewed-by: Roger Quadros <rogerq@kernel.org> Link: https://lore.kernel.org/r/20230518112750.57924-7-minda.chen@starfivetech.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Minda Chen
Greg Kroah-Hartman
parent
8486eb8068
commit
bfb46b4246
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@ -20137,6 +20137,12 @@ F: Documentation/devicetree/bindings/reset/starfive,jh7100-reset.yaml
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F: drivers/reset/starfive/reset-starfive-jh71*
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F: include/dt-bindings/reset/starfive?jh71*.h
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STARFIVE JH71X0 USB DRIVERS
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M: Minda Chen <minda.chen@starfivetech.com>
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S: Maintained
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F: Documentation/devicetree/bindings/usb/starfive,jh7110-usb.yaml
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F: drivers/usb/cdns3/cdns3-starfive.c
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STARFIVE JH71XX PMU CONTROLLER DRIVER
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M: Walker Chen <walker.chen@starfivetech.com>
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S: Supported
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@ -78,6 +78,17 @@ config USB_CDNS3_IMX
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For example, imx8qm and imx8qxp.
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config USB_CDNS3_STARFIVE
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tristate "Cadence USB3 support on StarFive SoC platforms"
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depends on ARCH_STARFIVE || COMPILE_TEST
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help
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Say 'Y' or 'M' here if you are building for StarFive SoCs
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platforms that contain Cadence USB3 controller core.
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e.g. JH7110.
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If you choose to build this driver as module it will
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be dynamically linked and module will be called cdns3-starfive.ko
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endif
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if USB_CDNS_SUPPORT
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@ -24,6 +24,7 @@ endif
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obj-$(CONFIG_USB_CDNS3_PCI_WRAP) += cdns3-pci-wrap.o
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obj-$(CONFIG_USB_CDNS3_TI) += cdns3-ti.o
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obj-$(CONFIG_USB_CDNS3_IMX) += cdns3-imx.o
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obj-$(CONFIG_USB_CDNS3_STARFIVE) += cdns3-starfive.o
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cdnsp-udc-pci-y := cdnsp-pci.o
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@ -0,0 +1,246 @@
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// SPDX-License-Identifier: GPL-2.0
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/**
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* cdns3-starfive.c - StarFive specific Glue layer for Cadence USB Controller
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*
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* Copyright (C) 2023 StarFive Technology Co., Ltd.
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*
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* Author: Minda Chen <minda.chen@starfivetech.com>
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*/
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#include <linux/bits.h>
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#include <linux/clk.h>
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#include <linux/module.h>
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#include <linux/mfd/syscon.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/of_platform.h>
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#include <linux/reset.h>
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#include <linux/regmap.h>
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#include <linux/usb/otg.h>
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#include "core.h"
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#define USB_STRAP_HOST BIT(17)
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#define USB_STRAP_DEVICE BIT(18)
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#define USB_STRAP_MASK GENMASK(18, 16)
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#define USB_SUSPENDM_HOST BIT(19)
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#define USB_SUSPENDM_MASK BIT(19)
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#define USB_MISC_CFG_MASK GENMASK(23, 20)
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#define USB_SUSPENDM_BYPS BIT(20)
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#define USB_PLL_EN BIT(22)
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#define USB_REFCLK_MODE BIT(23)
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struct cdns_starfive {
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struct device *dev;
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struct regmap *stg_syscon;
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struct reset_control *resets;
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struct clk_bulk_data *clks;
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int num_clks;
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u32 stg_usb_mode;
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};
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static void cdns_mode_init(struct platform_device *pdev,
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struct cdns_starfive *data)
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{
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enum usb_dr_mode mode;
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regmap_update_bits(data->stg_syscon, data->stg_usb_mode,
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USB_MISC_CFG_MASK,
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USB_SUSPENDM_BYPS | USB_PLL_EN | USB_REFCLK_MODE);
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/* dr mode setting */
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mode = usb_get_dr_mode(&pdev->dev);
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switch (mode) {
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case USB_DR_MODE_HOST:
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regmap_update_bits(data->stg_syscon,
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data->stg_usb_mode,
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USB_STRAP_MASK,
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USB_STRAP_HOST);
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regmap_update_bits(data->stg_syscon,
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data->stg_usb_mode,
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USB_SUSPENDM_MASK,
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USB_SUSPENDM_HOST);
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break;
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case USB_DR_MODE_PERIPHERAL:
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regmap_update_bits(data->stg_syscon, data->stg_usb_mode,
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USB_STRAP_MASK, USB_STRAP_DEVICE);
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regmap_update_bits(data->stg_syscon, data->stg_usb_mode,
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USB_SUSPENDM_MASK, 0);
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break;
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default:
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break;
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}
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}
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static int cdns_clk_rst_init(struct cdns_starfive *data)
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{
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int ret;
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ret = clk_bulk_prepare_enable(data->num_clks, data->clks);
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if (ret)
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return dev_err_probe(data->dev, ret,
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"failed to enable clocks\n");
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ret = reset_control_deassert(data->resets);
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if (ret) {
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dev_err(data->dev, "failed to reset clocks\n");
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goto err_clk_init;
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}
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return ret;
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err_clk_init:
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clk_bulk_disable_unprepare(data->num_clks, data->clks);
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return ret;
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}
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static void cdns_clk_rst_deinit(struct cdns_starfive *data)
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{
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reset_control_assert(data->resets);
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clk_bulk_disable_unprepare(data->num_clks, data->clks);
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}
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static int cdns_starfive_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct cdns_starfive *data;
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unsigned int args;
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int ret;
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data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->dev = dev;
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data->stg_syscon =
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syscon_regmap_lookup_by_phandle_args(pdev->dev.of_node,
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"starfive,stg-syscon", 1, &args);
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if (IS_ERR(data->stg_syscon))
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return dev_err_probe(dev, PTR_ERR(data->stg_syscon),
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"Failed to parse starfive,stg-syscon\n");
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data->stg_usb_mode = args;
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data->num_clks = devm_clk_bulk_get_all(data->dev, &data->clks);
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if (data->num_clks < 0)
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return dev_err_probe(data->dev, -ENODEV,
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"Failed to get clocks\n");
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data->resets = devm_reset_control_array_get_exclusive(data->dev);
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if (IS_ERR(data->resets))
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return dev_err_probe(data->dev, PTR_ERR(data->resets),
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"Failed to get resets");
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cdns_mode_init(pdev, data);
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ret = cdns_clk_rst_init(data);
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if (ret)
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return ret;
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ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
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if (ret) {
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dev_err(dev, "Failed to create children\n");
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cdns_clk_rst_deinit(data);
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return ret;
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}
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device_set_wakeup_capable(dev, true);
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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platform_set_drvdata(pdev, data);
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return 0;
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}
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static int cdns_starfive_remove_core(struct device *dev, void *c)
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{
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struct platform_device *pdev = to_platform_device(dev);
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platform_device_unregister(pdev);
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return 0;
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}
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static int cdns_starfive_remove(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct cdns_starfive *data = dev_get_drvdata(dev);
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pm_runtime_get_sync(dev);
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device_for_each_child(dev, NULL, cdns_starfive_remove_core);
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pm_runtime_disable(dev);
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pm_runtime_put_noidle(dev);
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cdns_clk_rst_deinit(data);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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#ifdef CONFIG_PM
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static int cdns_starfive_runtime_resume(struct device *dev)
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{
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struct cdns_starfive *data = dev_get_drvdata(dev);
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return clk_bulk_prepare_enable(data->num_clks, data->clks);
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}
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static int cdns_starfive_runtime_suspend(struct device *dev)
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{
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struct cdns_starfive *data = dev_get_drvdata(dev);
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clk_bulk_disable_unprepare(data->num_clks, data->clks);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int cdns_starfive_resume(struct device *dev)
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{
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struct cdns_starfive *data = dev_get_drvdata(dev);
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return cdns_clk_rst_init(data);
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}
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static int cdns_starfive_suspend(struct device *dev)
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{
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struct cdns_starfive *data = dev_get_drvdata(dev);
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cdns_clk_rst_deinit(data);
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return 0;
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}
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#endif
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#endif
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static const struct dev_pm_ops cdns_starfive_pm_ops = {
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SET_RUNTIME_PM_OPS(cdns_starfive_runtime_suspend,
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cdns_starfive_runtime_resume, NULL)
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SET_SYSTEM_SLEEP_PM_OPS(cdns_starfive_suspend, cdns_starfive_resume)
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};
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static const struct of_device_id cdns_starfive_of_match[] = {
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{ .compatible = "starfive,jh7110-usb", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, cdns_starfive_of_match);
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static struct platform_driver cdns_starfive_driver = {
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.probe = cdns_starfive_probe,
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.remove = cdns_starfive_remove,
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.driver = {
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.name = "cdns3-starfive",
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.of_match_table = cdns_starfive_of_match,
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.pm = &cdns_starfive_pm_ops,
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},
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};
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module_platform_driver(cdns_starfive_driver);
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MODULE_ALIAS("platform:cdns3-starfive");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Cadence USB3 StarFive Glue Layer");
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