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// 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,
};
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