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