1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-npcm.c b/drivers/usb/host/ehci-npcm.c
new file mode 100644
index 00000000000..357a5614edb
--- /dev/null
+++ b/drivers/usb/host/ehci-npcm.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2021 Nuvoton Technology Corp.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <generic-phy.h>
+#include <reset.h>
+#include <asm/io.h>
+#include <dm/device_compat.h>
+#include <linux/delay.h>
+#include "ehci.h"
+
+struct npcm_ehci_priv {
+	struct ehci_ctrl ctrl;
+	struct ehci_hccr *hcd;
+	struct phy phy;
+};
+
+static int npcm_ehci_setup_phy(struct udevice *dev, struct phy *phy)
+{
+	int ret;
+
+	if (!phy)
+		return 0;
+
+	ret = generic_phy_get_by_index(dev, 0, phy);
+	if (ret) {
+		if (ret != -ENOENT) {
+			dev_err(dev, "failed to get usb phy\n");
+			return ret;
+		}
+	} else {
+		ret = generic_phy_init(phy);
+		if (ret) {
+			dev_err(dev, "failed to init usb phy\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int npcm_ehci_init(struct udevice *dev)
+{
+	struct npcm_ehci_priv *priv = dev_get_priv(dev);
+	struct reset_ctl reset;
+	int ret;
+
+	ret = reset_get_by_index(dev, 0, &reset);
+	if (ret && ret != -ENOENT && ret != -ENOTSUPP) {
+		dev_err(dev, "failed to get reset\n");
+		return ret;
+	}
+
+	/* reset controller */
+	if (reset_valid(&reset))
+		reset_assert(&reset);
+
+	/* setup phy */
+	ret = npcm_ehci_setup_phy(dev, &priv->phy);
+	if (ret)
+		return ret;
+
+	/* release controller from reset */
+	if (reset_valid(&reset))
+		reset_deassert(&reset);
+
+	return 0;
+}
+
+static int npcm_ehci_probe(struct udevice *dev)
+{
+	struct npcm_ehci_priv *priv = dev_get_priv(dev);
+	struct ehci_hcor *hcor;
+	enum usb_init_type type = dev_get_driver_data(dev);
+	int ret;
+
+	ret = npcm_ehci_init(dev);
+	if (ret)
+		return ret;
+
+	priv->hcd = (struct ehci_hccr *)dev_read_addr_ptr(dev);
+	debug("USB HCD @0x%p\n", priv->hcd);
+	hcor = (struct ehci_hcor *)((uintptr_t)priv->hcd +
+			HC_LENGTH(ehci_readl(&priv->hcd->cr_capbase)));
+
+	return ehci_register(dev, priv->hcd, hcor, NULL, 0, type);
+}
+
+static int npcm_ehci_remove(struct udevice *dev)
+{
+	struct npcm_ehci_priv *priv = dev_get_priv(dev);
+
+	generic_phy_exit(&priv->phy);
+
+	return ehci_deregister(dev);
+}
+
+static const struct udevice_id npcm_ehci_ids[] = {
+	{ .compatible = "nuvoton,npcm845-ehci", .data = USB_INIT_HOST },
+	{ .compatible = "nuvoton,npcm845-udc", .data = USB_INIT_DEVICE },
+	{ .compatible = "nuvoton,npcm750-ehci", .data = USB_INIT_HOST },
+	{ .compatible = "nuvoton,npcm750-udc", .data = USB_INIT_DEVICE },
+	{ }
+};
+
+U_BOOT_DRIVER(ehci_npcm) = {
+	.name	= "ehci_npcm",
+	.id	= UCLASS_USB,
+	.of_match = npcm_ehci_ids,
+	.probe = npcm_ehci_probe,
+	.remove = npcm_ehci_remove,
+	.ops	= &ehci_usb_ops,
+	.priv_auto = sizeof(struct npcm_ehci_priv),
+	.plat_auto = sizeof(struct usb_plat),
+	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
+};