[PATCH v14 29/38] usb: dwc3: rockchip: introduce glue driver

Introduce Rockchip specific glue code for the Synopsys DWC3 USB driver.
For now this handles things identical to the default glue.

Signed-off-by: Sebastian Reichel <[email protected]>
---
 drivers/usb/dwc3/Kconfig         |  11 ++++
 drivers/usb/dwc3/Makefile        |   1 +
 drivers/usb/dwc3/core.c          |  15 +++++
 drivers/usb/dwc3/dwc3-rockchip.c | 115 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 142 insertions(+)

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 18169727a413..3c120ea9746d 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -190,6 +190,17 @@ config USB_DWC3_OCTEON
 	  Only the host mode is currently supported.
 	  Say 'Y' or 'M' here if you have one such device.
 
+config USB_DWC3_ROCKCHIP
+	tristate "Rockchip DWC3 Platform Driver"
+	depends on ARCH_ROCKCHIP || COMPILE_TEST
+	depends on OF
+	default USB_DWC3
+	help
+	  Rockchip SoCs with DesignWare Core USB3 IP inside,
+	  and IP Core configured for USB 2.0 and USB 3.0 in host
+	  or dual-role mode.
+	  Say 'Y' or 'M' if you have such device.
+
 config USB_DWC3_RTK
 	tristate "Realtek DWC3 Platform Driver"
 	depends on OF && ARCH_REALTEK
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index f37971197203..444e7e7f34b2 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_USB_DWC3_IMX8MP)		+= dwc3-imx8mp.o
 obj-$(CONFIG_USB_DWC3_IMX)		+= dwc3-imx.o
 obj-$(CONFIG_USB_DWC3_XILINX)		+= dwc3-xilinx.o
 obj-$(CONFIG_USB_DWC3_OCTEON)		+= dwc3-octeon.o
+obj-$(CONFIG_USB_DWC3_ROCKCHIP)		+= dwc3-rockchip.o
 obj-$(CONFIG_USB_DWC3_RTK)		+= dwc3-rtk.o
 obj-$(CONFIG_USB_DWC3_GENERIC_PLAT)	+= dwc3-generic-plat.o
 obj-$(CONFIG_USB_DWC3_GOOGLE)		+= dwc3-google.o
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 517aa7f1486d..6e796489a04d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -2380,11 +2380,26 @@ int dwc3_core_probe(const struct dwc3_probe_data *data)
 }
 EXPORT_SYMBOL_GPL(dwc3_core_probe);
 
+/*
+ * List of compatibles, which have "synopsys,dwc3" as a fallback
+ * compatible, but have a vendor specific glue driver that should
+ * be used instead of this one.
+ */
+static const char *const dwc3_compatible_blocklist[] = {
+	"rockchip,rk3588-dwc3",
+	"rockchip,rk3576-dwc3",
+};
+
 static int dwc3_probe(struct platform_device *pdev)
 {
 	struct dwc3_probe_data probe_data = {};
 	struct resource *res;
 	struct dwc3 *dwc;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dwc3_compatible_blocklist); i++)
+		if (device_is_compatible(&pdev->dev, dwc3_compatible_blocklist[i]))
+			return -ENODEV;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
diff --git a/drivers/usb/dwc3/dwc3-rockchip.c b/drivers/usb/dwc3/dwc3-rockchip.c
new file mode 100644
index 000000000000..1df33625b69f
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-rockchip.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2026, Collabora Ltd. */
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include "glue.h"
+
+struct dwc3_rockchip {
+	struct dwc3		dwc;
+};
+
+static int dwc3_rockchip_probe(struct platform_device *pdev)
+{
+	struct dwc3_probe_data probe_data = {};
+	struct resource *res;
+	struct dwc3_rockchip *dwc_rk;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "missing memory resource\n");
+		return -ENODEV;
+	}
+
+	dwc_rk = devm_kzalloc(&pdev->dev, sizeof(*dwc_rk), GFP_KERNEL);
+	if (!dwc_rk)
+		return -ENOMEM;
+
+	dwc_rk->dwc.dev = &pdev->dev;
+	dwc_rk->dwc.glue_ops = NULL;
+
+	probe_data.dwc = &dwc_rk->dwc;
+	probe_data.res = res;
+	probe_data.properties = DWC3_DEFAULT_PROPERTIES;
+
+	return dwc3_core_probe(&probe_data);
+}
+
+static void dwc3_rockchip_remove(struct platform_device *pdev)
+{
+	dwc3_core_remove(platform_get_drvdata(pdev));
+}
+
+#ifdef CONFIG_PM
+static int dwc3_rockchip_runtime_suspend(struct device *dev)
+{
+	return dwc3_runtime_suspend(dev_get_drvdata(dev));
+}
+
+static int dwc3_rockchip_runtime_resume(struct device *dev)
+{
+	return dwc3_runtime_resume(dev_get_drvdata(dev));
+}
+
+static int dwc3_rockchip_runtime_idle(struct device *dev)
+{
+	return dwc3_runtime_idle(dev_get_drvdata(dev));
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int dwc3_rockchip_suspend(struct device *dev)
+{
+	return dwc3_pm_suspend(dev_get_drvdata(dev));
+}
+
+static int dwc3_rockchip_resume(struct device *dev)
+{
+	return dwc3_pm_resume(dev_get_drvdata(dev));
+}
+
+static void dwc3_rockchip_complete(struct device *dev)
+{
+	dwc3_pm_complete(dev_get_drvdata(dev));
+}
+
+static int dwc3_rockchip_prepare(struct device *dev)
+{
+	return dwc3_pm_prepare(dev_get_drvdata(dev));
+}
+#endif
+
+static const struct dev_pm_ops dwc3_rockchip_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(dwc3_rockchip_suspend, dwc3_rockchip_resume)
+	.complete = dwc3_rockchip_complete,
+	.prepare = dwc3_rockchip_prepare,
+	/*
+	 * Runtime suspend halts the controller on disconnection. It relies on
+	 * platforms with custom connection notification to start the controller
+	 * again.
+	 */
+	SET_RUNTIME_PM_OPS(dwc3_rockchip_runtime_suspend, dwc3_rockchip_runtime_resume,
+			   dwc3_rockchip_runtime_idle)
+};
+
+static const struct of_device_id dwc3_rockchip_of_match[] = {
+	{ .compatible = "rockchip,rk3588-dwc3" },
+	{ .compatible = "rockchip,rk3576-dwc3" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, dwc3_rockchip_of_match);
+
+static struct platform_driver dwc3_rockchip_driver = {
+	.probe		= dwc3_rockchip_probe,
+	.remove		= dwc3_rockchip_remove,
+	.driver		= {
+		.name	= "dwc3-rockchip",
+		.pm	= pm_ptr(&dwc3_rockchip_dev_pm_ops),
+		.of_match_table	= dwc3_rockchip_of_match,
+	},
+};
+
+module_platform_driver(dwc3_rockchip_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DesignWare DWC3 Rockchip Glue Driver");

-- 
2.53.0


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