[PATCH v14 29/38] usb: dwc3: rockchip: introduce glue driver
Sebastian Reichel
sebastian.reichel at collabora.com
Thu Aug 13 13:52:12 PDT 2026
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 <sebastian.reichel at collabora.com>
---
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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