usb: host: nuvoton: Add nuvoton NPCM7xx ehci/ohci driver
Add nuvoton BMC NPCM750 ehci/ohci driver
Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
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,
+};