usb: host: nuvoton: Add nuvoton NPCM7xx ehci/ohci driver

Add nuvoton BMC NPCM750 ehci/ohci driver

Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>

4 files changed, 245 insertions, 0 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index a0f48f0..1aabe06 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -214,6 +214,14 @@ config USB_EHCI_MXS
 	  Enables support for the on-chip EHCI controller on i.MX23 and
 	  i.MX28 SoCs.
 
+config USB_EHCI_NPCM
+	bool "Support for Nuvoton NPCM on-chip EHCI USB controller"
+	depends on ARCH_NPCM
+	default n
+	---help---
+	  Enables support for the on-chip EHCI controller on
+	  Nuvoton NPCM chips.
+
 config USB_EHCI_OMAP
 	bool "Support for OMAP3+ on-chip EHCI USB controller"
 	depends on ARCH_OMAP2PLUS
@@ -343,6 +351,14 @@ config USB_OHCI_DA8XX
 	help
 	  Enable support for the da850 USB controller.
 
+config USB_OHCI_NPCM
+	bool "Support for Nuvoton NPCM on-chip OHCI USB controller"
+	depends on ARCH_NPCM
+	default n
+	---help---
+	  Enables support for the on-chip OHCI controller on
+	  Nuvoton NPCM chips.
+
 endif # USB_OHCI_HCD
 
 config SYS_USB_OHCI_SLOT_NAME
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 5fdb804..ddc3663 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_USB_SL811HS) += sl811-hcd.o
 obj-$(CONFIG_USB_OHCI_LPC32XX) += ohci-lpc32xx.o
 obj-$(CONFIG_USB_OHCI_PCI) += ohci-pci.o
 obj-$(CONFIG_USB_OHCI_GENERIC) += ohci-generic.o
+obj-$(CONFIG_USB_OHCI_NPCM) += ohci-npcm.o
 
 # echi
 obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
@@ -34,6 +35,7 @@ obj-$(CONFIG_USB_EHCI_MXS) += ehci-mxs.o
 obj-$(CONFIG_USB_EHCI_MX5) += ehci-mx5.o
 obj-$(CONFIG_USB_EHCI_MX6) += ehci-mx6.o
 obj-$(CONFIG_USB_EHCI_MX7) += ehci-mx6.o
+obj-$(CONFIG_USB_EHCI_NPCM) += ehci-npcm.o
 obj-$(CONFIG_USB_EHCI_OMAP) += ehci-omap.o
 obj-$(CONFIG_USB_EHCI_MARVELL) += ehci-marvell.o
 obj-$(CONFIG_USB_EHCI_MSM) += ehci-msm.o
diff --git a/drivers/usb/host/ehci-npcm.c b/drivers/usb/host/ehci-npcm.c
new file mode 100644
index 0000000..357a561
--- /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,
+};
diff --git a/drivers/usb/host/ohci-npcm.c b/drivers/usb/host/ohci-npcm.c
new file mode 100644
index 0000000..9e1d529
--- /dev/null
+++ b/drivers/usb/host/ohci-npcm.c
@@ -0,0 +1,108 @@
+// 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 "ohci.h"
+
+struct npcm_ohci_priv {
+	ohci_t ohci;
+	struct phy phy;
+};
+
+static int npcm_ohci_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_ohci_init(struct udevice *dev)
+{
+	struct npcm_ohci_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_ohci_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_ohci_probe(struct udevice *dev)
+{
+	struct ohci_regs *regs = dev_read_addr_ptr(dev);
+	int ret;
+
+	ret = npcm_ohci_init(dev);
+	if (ret)
+		return ret;
+
+	return ohci_register(dev, regs);
+}
+
+static int npcm_ohci_remove(struct udevice *dev)
+{
+	struct npcm_ohci_priv *priv = dev_get_priv(dev);
+
+	generic_phy_exit(&priv->phy);
+
+	return ohci_deregister(dev);
+}
+
+static const struct udevice_id npcm_ohci_ids[] = {
+	{ .compatible = "nuvoton,npcm845-ohci" },
+	{ .compatible = "nuvoton,npcm750-ohci" },
+	{ }
+};
+
+U_BOOT_DRIVER(ohci_npcm) = {
+	.name	= "ohci_npcm",
+	.id	= UCLASS_USB,
+	.of_match = npcm_ohci_ids,
+	.probe = npcm_ohci_probe,
+	.remove = npcm_ohci_remove,
+	.ops	= &ohci_usb_ops,
+	.priv_auto = sizeof(struct npcm_ohci_priv),
+	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
+};