--- /dev/null
+From 092b59cfb934bf8f0ba9b9d9aee424c590c46446 Mon Sep 17 00:00:00 2001
+From: Minda Chen <minda.chen@starfivetech.com>
+Date: Thu, 18 May 2023 19:27:49 +0800
+Subject: [PATCH 105/129] 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>
+---
+ drivers/usb/cdns3/Kconfig | 11 ++
+ drivers/usb/cdns3/Makefile | 1 +
+ drivers/usb/cdns3/cdns3-starfive.c | 246 +++++++++++++++++++++++++++++
+ 3 files changed, 258 insertions(+)
+ create mode 100644 drivers/usb/cdns3/cdns3-starfive.c
+
+diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig
+index b98ca0a13..0a514b591 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 61edb2f89..48dfae75b 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 000000000..fc1f003b1
+--- /dev/null
++++ b/drivers/usb/cdns3/cdns3-starfive.c
+@@ -0,0 +1,246 @@
++// 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: Minda Chen <minda.chen@starfivetech.com>
++ */
++
++#include <linux/bits.h>
++#include <linux/clk.h>
++#include <linux/module.h>
++#include <linux/mfd/syscon.h>
++#include <linux/kernel.h>
++#include <linux/platform_device.h>
++#include <linux/io.h>
++#include <linux/of_platform.h>
++#include <linux/reset.h>
++#include <linux/regmap.h>
++#include <linux/usb/otg.h>
++#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 USB_MISC_CFG_MASK GENMASK(23, 20)
++#define USB_SUSPENDM_BYPS BIT(20)
++#define USB_PLL_EN BIT(22)
++#define USB_REFCLK_MODE BIT(23)
++
++struct cdns_starfive {
++ struct device *dev;
++ struct regmap *stg_syscon;
++ struct reset_control *resets;
++ struct clk_bulk_data *clks;
++ int num_clks;
++ u32 stg_usb_mode;
++};
++
++static void cdns_mode_init(struct platform_device *pdev,
++ struct cdns_starfive *data)
++{
++ enum usb_dr_mode mode;
++
++ regmap_update_bits(data->stg_syscon, data->stg_usb_mode,
++ USB_MISC_CFG_MASK,
++ USB_SUSPENDM_BYPS | USB_PLL_EN | USB_REFCLK_MODE);
++
++ /* dr mode setting */
++ 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);
++ 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);
++ break;
++ 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_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;
++
++ 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");
++
++ cdns_mode_init(pdev, data);
++ ret = cdns_clk_rst_init(data);
++ if (ret)
++ return ret;
++
++ ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
++ if (ret) {
++ dev_err(dev, "Failed to create children\n");
++ cdns_clk_rst_deinit(data);
++ return ret;
++ }
++
++ device_set_wakeup_capable(dev, true);
++ pm_runtime_set_active(dev);
++ pm_runtime_enable(dev);
++ platform_set_drvdata(pdev, data);
++
++ 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);
++
++ pm_runtime_disable(dev);
++ pm_runtime_put_noidle(dev);
++ cdns_clk_rst_deinit(data);
++ platform_set_drvdata(pdev, NULL);
++
++ return 0;
++}
++
++#ifdef CONFIG_PM
++static int cdns_starfive_runtime_resume(struct device *dev)
++{
++ struct cdns_starfive *data = dev_get_drvdata(dev);
++
++ return clk_bulk_prepare_enable(data->num_clks, data->clks);
++}
++
++static int cdns_starfive_runtime_suspend(struct device *dev)
++{
++ struct cdns_starfive *data = dev_get_drvdata(dev);
++
++ clk_bulk_disable_unprepare(data->num_clks, data->clks);
++
++ return 0;
++}
++
++#ifdef CONFIG_PM_SLEEP
++static int cdns_starfive_resume(struct device *dev)
++{
++ struct cdns_starfive *data = dev_get_drvdata(dev);
++
++ return cdns_clk_rst_init(data);
++}
++
++static int cdns_starfive_suspend(struct device *dev)
++{
++ struct cdns_starfive *data = dev_get_drvdata(dev);
++
++ cdns_clk_rst_deinit(data);
++
++ return 0;
++}
++#endif
++#endif
++
++static const struct dev_pm_ops cdns_starfive_pm_ops = {
++ SET_RUNTIME_PM_OPS(cdns_starfive_runtime_suspend,
++ cdns_starfive_runtime_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_LICENSE("GPL v2");
++MODULE_DESCRIPTION("Cadence USB3 StarFive Glue Layer");
+--
+2.25.1
+
projects / openwrt / staging / wigyori.git / blobdiff