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// SPDX-License-Identifier: GPL-2.0+
/*
* phy_uniphier_usb3.c - Socionext UniPhier Usb3 PHY driver
* Copyright 2019-2023 Socionext, Inc.
*/
#include <common.h>
#include <dm.h>
#include <generic-phy.h>
#include <clk.h>
#include <reset.h>
struct uniphier_usb3phy_priv {
struct clk *clk_link, *clk_phy, *clk_parent, *clk_phyext;
struct reset_ctl *rst_link, *rst_phy, *rst_parent;
};
static int uniphier_usb3phy_init(struct phy *phy)
{
struct uniphier_usb3phy_priv *priv = dev_get_priv(phy->dev);
int ret;
ret = clk_enable(priv->clk_phy);
if (ret)
return ret;
ret = reset_deassert(priv->rst_phy);
if (ret)
goto out_clk;
if (priv->clk_phyext) {
ret = clk_enable(priv->clk_phyext);
if (ret)
goto out_rst;
}
return 0;
out_rst:
reset_assert(priv->rst_phy);
out_clk:
clk_disable(priv->clk_phy);
return ret;
}
static int uniphier_usb3phy_exit(struct phy *phy)
{
struct uniphier_usb3phy_priv *priv = dev_get_priv(phy->dev);
if (priv->clk_phyext)
clk_disable(priv->clk_phyext);
reset_assert(priv->rst_phy);
clk_disable(priv->clk_phy);
return 0;
}
static int uniphier_usb3phy_probe(struct udevice *dev)
{
struct uniphier_usb3phy_priv *priv = dev_get_priv(dev);
int ret;
priv->clk_link = devm_clk_get(dev, "link");
if (IS_ERR(priv->clk_link)) {
printf("Failed to get link clock\n");
return PTR_ERR(priv->clk_link);
}
priv->clk_phy = devm_clk_get(dev, "phy");
if (IS_ERR(priv->clk_link)) {
printf("Failed to get phy clock\n");
return PTR_ERR(priv->clk_link);
}
priv->clk_parent = devm_clk_get_optional(dev, "gio");
if (IS_ERR(priv->clk_parent)) {
printf("Failed to get parent clock\n");
return PTR_ERR(priv->clk_parent);
}
priv->clk_phyext = devm_clk_get_optional(dev, "phy-ext");
if (IS_ERR(priv->clk_phyext)) {
printf("Failed to get external phy clock\n");
return PTR_ERR(priv->clk_phyext);
}
priv->rst_link = devm_reset_control_get(dev, "link");
if (IS_ERR(priv->rst_link)) {
printf("Failed to get link reset\n");
return PTR_ERR(priv->rst_link);
}
priv->rst_phy = devm_reset_control_get(dev, "phy");
if (IS_ERR(priv->rst_phy)) {
printf("Failed to get phy reset\n");
return PTR_ERR(priv->rst_phy);
}
priv->rst_parent = devm_reset_control_get_optional(dev, "gio");
if (IS_ERR(priv->rst_parent)) {
printf("Failed to get parent reset\n");
return PTR_ERR(priv->rst_parent);
}
if (priv->clk_parent) {
ret = clk_enable(priv->clk_parent);
if (ret)
return ret;
}
if (priv->rst_parent) {
ret = reset_deassert(priv->rst_parent);
if (ret)
goto out_clk_parent;
}
ret = clk_enable(priv->clk_link);
if (ret)
goto out_rst_parent;
ret = reset_deassert(priv->rst_link);
if (ret)
goto out_clk;
return 0;
out_clk:
clk_disable(priv->clk_link);
out_rst_parent:
if (priv->rst_parent)
reset_assert(priv->rst_parent);
out_clk_parent:
if (priv->clk_parent)
clk_disable(priv->clk_parent);
return ret;
}
static struct phy_ops uniphier_usb3phy_ops = {
.init = uniphier_usb3phy_init,
.exit = uniphier_usb3phy_exit,
};
static const struct udevice_id uniphier_usb3phy_ids[] = {
{ .compatible = "socionext,uniphier-pro4-usb3-ssphy" },
{ .compatible = "socionext,uniphier-pro5-usb3-hsphy" },
{ .compatible = "socionext,uniphier-pro5-usb3-ssphy" },
{ .compatible = "socionext,uniphier-pxs2-usb3-hsphy" },
{ .compatible = "socionext,uniphier-pxs2-usb3-ssphy" },
{ .compatible = "socionext,uniphier-ld20-usb3-hsphy" },
{ .compatible = "socionext,uniphier-ld20-usb3-ssphy" },
{ .compatible = "socionext,uniphier-pxs3-usb3-hsphy" },
{ .compatible = "socionext,uniphier-pxs3-usb3-ssphy" },
{ .compatible = "socionext,uniphier-nx1-usb3-hsphy" },
{ .compatible = "socionext,uniphier-nx1-usb3-ssphy" },
{ }
};
U_BOOT_DRIVER(uniphier_usb3_phy) = {
.name = "uniphier-usb3-phy",
.id = UCLASS_PHY,
.of_match = uniphier_usb3phy_ids,
.ops = &uniphier_usb3phy_ops,
.probe = uniphier_usb3phy_probe,
.priv_auto = sizeof(struct uniphier_usb3phy_priv),
};
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