[PATCH 2/3] usb: dwc3: add layerscape dwc3 support

[Frank Li <Frank.Li@nxp.com>]

Add layerscape dwc3 support by using flatten dwc3 core library. Layerscape
dwc3 need set software managed property snps,gsbuscfg0-reqinfo as 0x2222
when dma-coherence set.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/usb/dwc3/Kconfig           | 10 +++++
 drivers/usb/dwc3/Makefile          |  1 +
 drivers/usb/dwc3/dwc3-layerscape.c | 88 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 99 insertions(+)

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 310d182e10b50..13a86cf03b94b 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -150,6 +150,16 @@ config USB_DWC3_IMX8MP
 	  functionality.
 	  Say 'Y' or 'M' if you have one such device.
 
+config USB_DWC3_LAYERSCAPE
+	tristate "NXP Layerscape Platform"
+	depends on OF && COMMON_CLK
+	depends on ARCH_LAYERSCAPE || COMPILE_TEST
+	default USB_DWC3
+	help
+	  NXP LAYERSCAPE SoC use DesignWare Core IP for USB2/3
+	  functionality.
+	  Say 'Y' or 'M' if you have one such device.
+
 config USB_DWC3_XILINX
 	tristate "Xilinx Platforms"
 	depends on (ARCH_ZYNQMP || COMPILE_TEST) && OF
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 830e6c9e5fe07..cd635b77902fb 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -54,6 +54,7 @@ obj-$(CONFIG_USB_DWC3_ST)		+= dwc3-st.o
 obj-$(CONFIG_USB_DWC3_QCOM)		+= dwc3-qcom.o
 obj-$(CONFIG_USB_DWC3_QCOM)		+= dwc3-qcom-legacy.o
 obj-$(CONFIG_USB_DWC3_IMX8MP)		+= dwc3-imx8mp.o
+obj-$(CONFIG_USB_DWC3_LAYERSCAPE)	+= dwc3-layerscape.o
 obj-$(CONFIG_USB_DWC3_XILINX)		+= dwc3-xilinx.o
 obj-$(CONFIG_USB_DWC3_OCTEON)		+= dwc3-octeon.o
 obj-$(CONFIG_USB_DWC3_RTK)		+= dwc3-rtk.o
diff --git a/drivers/usb/dwc3/dwc3-layerscape.c b/drivers/usb/dwc3/dwc3-layerscape.c
new file mode 100644
index 0000000000000..d093f178e1e35
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-layerscape.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 NXP
+ */
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/usb/of.h>
+
+#include "core.h"
+#include "glue.h"
+
+struct dwc3_ls {
+	struct device *dev;
+	struct dwc3 dwc;
+};
+
+static int dwc3_ls_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct dwc3_probe_data probe_data = {};
+	struct property_entry props[2] = {};
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct dwc3_ls *ls;
+	int prop_idx = 0;
+	int ret = 0;
+
+	ls = devm_kzalloc(&pdev->dev, sizeof(*ls), GFP_KERNEL);
+	if (!ls)
+		return -ENOMEM;
+
+	ls->dev = &pdev->dev;
+
+	ls->dwc.dev = dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		dev_err_probe(&pdev->dev, -ENODEV, "missing memory resource\n");
+
+	if (of_dma_is_coherent(np))
+		props[prop_idx++] = PROPERTY_ENTRY_U16("snps,gsbuscfg0-reqinfo", 0x2222);
+
+	if (prop_idx)
+		ret = device_create_managed_software_node(dev, props, NULL);
+
+	if (ret)
+		return dev_err_probe(dev, ret, "fail create software managed property node\n");
+
+	probe_data.dwc = &ls->dwc;
+	probe_data.res = res;
+	ret = dwc3_core_probe(&probe_data);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to register DWC3 Core\n");
+
+	return 0;
+}
+
+static void dwc3_ls_remove(struct platform_device *pdev)
+{
+	struct dwc3 *dwc = platform_get_drvdata(pdev);
+
+	dwc3_core_remove(dwc);
+}
+
+static const struct of_device_id of_dwc3_ls_match[] = {
+	{
+		.compatible = "fsl,ls1028a-dwc3"
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_dwc3_ls_match);
+
+static struct platform_driver dwc3_ls_driver = {
+	.probe	  = dwc3_ls_probe,
+	.remove	 = dwc3_ls_remove,
+	.driver	 = {
+		.name   = "ls-dwc3",
+		.of_match_table = of_dwc3_ls_match,
+	},
+};
+
+module_platform_driver(dwc3_ls_driver);
+
+MODULE_AUTHOR("Frank Li <frank.li@nxp.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Freescale Layerscape USB3 Controller Driver");

-- 
2.34.1