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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
*/
#include <common.h>
#include <clk.h>
#include <log.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <dm/ofnode.h>
#include <generic-phy.h>
#include <reset.h>
#include <asm/io.h>
#include <dm.h>
#include "ehci.h"
#include <power/regulator.h>
/*
* Even though here we don't explicitly use "struct ehci_ctrl"
* ehci_register() expects it to be the first thing that resides in
* device's private data.
*/
struct generic_ehci {
struct ehci_ctrl ctrl;
struct clk_bulk clocks;
struct reset_ctl_bulk resets;
struct phy phy;
struct udevice *vbus_supply;
};
static int ehci_enable_vbus_supply(struct udevice *dev)
{
struct generic_ehci *priv = dev_get_priv(dev);
int ret;
ret = device_get_supply_regulator(dev, "vbus-supply",
&priv->vbus_supply);
if (ret && ret != -ENOENT)
return ret;
if (priv->vbus_supply) {
ret = regulator_set_enable(priv->vbus_supply, true);
if (ret) {
dev_err(dev, "Error enabling VBUS supply (ret=%d)\n", ret);
return ret;
}
} else {
dev_dbg(dev, "No vbus supply\n");
}
return 0;
}
static int ehci_disable_vbus_supply(struct generic_ehci *priv)
{
if (priv->vbus_supply)
return regulator_set_enable(priv->vbus_supply, false);
else
return 0;
}
static int ehci_usb_probe(struct udevice *dev)
{
struct generic_ehci *priv = dev_get_priv(dev);
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
int err, ret;
err = 0;
ret = clk_get_bulk(dev, &priv->clocks);
if (ret) {
dev_err(dev, "Failed to get clocks (ret=%d)\n", ret);
return ret;
}
err = clk_enable_bulk(&priv->clocks);
if (err) {
dev_err(dev, "Failed to enable clocks (err=%d)\n", err);
goto clk_err;
}
err = reset_get_bulk(dev, &priv->resets);
if (err) {
dev_err(dev, "Failed to get resets (err=%d)\n", err);
goto clk_err;
}
err = reset_deassert_bulk(&priv->resets);
if (err) {
dev_err(dev, "Failed to get deassert resets (err=%d)\n", err);
goto reset_err;
}
err = ehci_enable_vbus_supply(dev);
if (err)
goto reset_err;
err = ehci_setup_phy(dev, &priv->phy, 0);
if (err)
goto regulator_err;
hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE);
hcor = (struct ehci_hcor *)((uintptr_t)hccr +
HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
err = ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
if (err)
goto phy_err;
return 0;
phy_err:
ret = ehci_shutdown_phy(dev, &priv->phy);
if (ret)
dev_err(dev, "failed to shutdown usb phy (ret=%d)\n", ret);
regulator_err:
ret = ehci_disable_vbus_supply(priv);
if (ret)
dev_err(dev, "failed to disable VBUS supply (ret=%d)\n", ret);
reset_err:
ret = reset_release_bulk(&priv->resets);
if (ret)
dev_err(dev, "failed to release resets (ret=%d)\n", ret);
clk_err:
ret = clk_release_bulk(&priv->clocks);
if (ret)
dev_err(dev, "failed to release clocks (ret=%d)\n", ret);
return err;
}
static int ehci_usb_remove(struct udevice *dev)
{
struct generic_ehci *priv = dev_get_priv(dev);
int ret;
ret = ehci_deregister(dev);
if (ret)
return ret;
ret = ehci_shutdown_phy(dev, &priv->phy);
if (ret)
return ret;
ret = ehci_disable_vbus_supply(priv);
if (ret)
return ret;
ret = reset_release_bulk(&priv->resets);
if (ret)
return ret;
return clk_release_bulk(&priv->clocks);
}
static const struct udevice_id ehci_usb_ids[] = {
{ .compatible = "generic-ehci" },
{ }
};
U_BOOT_DRIVER(ehci_generic) = {
.name = "ehci_generic",
.id = UCLASS_USB,
.of_match = ehci_usb_ids,
.probe = ehci_usb_probe,
.remove = ehci_usb_remove,
.ops = &ehci_usb_ops,
.priv_auto = sizeof(struct generic_ehci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
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