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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2018 John Crispin <john@phrozen.org>
*
* Based on code from
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
*
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
struct ipq4019_usb_phy {
struct device *dev;
struct phy *phy;
void __iomem *base;
struct reset_control *por_rst;
struct reset_control *srif_rst;
};
static int ipq4019_ss_phy_power_off(struct phy *_phy)
{
struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
reset_control_assert(phy->por_rst);
msleep(10);
return 0;
}
static int ipq4019_ss_phy_power_on(struct phy *_phy)
{
struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
ipq4019_ss_phy_power_off(_phy);
reset_control_deassert(phy->por_rst);
return 0;
}
static const struct phy_ops ipq4019_usb_ss_phy_ops = {
.power_on = ipq4019_ss_phy_power_on,
.power_off = ipq4019_ss_phy_power_off,
};
static int ipq4019_hs_phy_power_off(struct phy *_phy)
{
struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
reset_control_assert(phy->por_rst);
msleep(10);
reset_control_assert(phy->srif_rst);
msleep(10);
return 0;
}
static int ipq4019_hs_phy_power_on(struct phy *_phy)
{
struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
ipq4019_hs_phy_power_off(_phy);
reset_control_deassert(phy->srif_rst);
msleep(10);
reset_control_deassert(phy->por_rst);
return 0;
}
static const struct phy_ops ipq4019_usb_hs_phy_ops = {
.power_on = ipq4019_hs_phy_power_on,
.power_off = ipq4019_hs_phy_power_off,
};
static const struct of_device_id ipq4019_usb_phy_of_match[] = {
{ .compatible = "qcom,usb-hs-ipq4019-phy", .data = &ipq4019_usb_hs_phy_ops},
{ .compatible = "qcom,usb-ss-ipq4019-phy", .data = &ipq4019_usb_ss_phy_ops},
{ },
};
MODULE_DEVICE_TABLE(of, ipq4019_usb_phy_of_match);
static int ipq4019_usb_phy_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct phy_provider *phy_provider;
struct ipq4019_usb_phy *phy;
phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
if (!phy)
return -ENOMEM;
phy->dev = &pdev->dev;
phy->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(phy->base)) {
dev_err(dev, "failed to remap register memory\n");
return PTR_ERR(phy->base);
}
phy->por_rst = devm_reset_control_get(phy->dev, "por_rst");
if (IS_ERR(phy->por_rst)) {
if (PTR_ERR(phy->por_rst) != -EPROBE_DEFER)
dev_err(dev, "POR reset is missing\n");
return PTR_ERR(phy->por_rst);
}
phy->srif_rst = devm_reset_control_get_optional(phy->dev, "srif_rst");
if (IS_ERR(phy->srif_rst))
return PTR_ERR(phy->srif_rst);
phy->phy = devm_phy_create(dev, NULL, of_device_get_match_data(dev));
if (IS_ERR(phy->phy)) {
dev_err(dev, "failed to create PHY\n");
return PTR_ERR(phy->phy);
}
phy_set_drvdata(phy->phy, phy);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
return PTR_ERR_OR_ZERO(phy_provider);
}
static struct platform_driver ipq4019_usb_phy_driver = {
.probe = ipq4019_usb_phy_probe,
.driver = {
.of_match_table = ipq4019_usb_phy_of_match,
.name = "ipq4019-usb-phy",
}
};
module_platform_driver(ipq4019_usb_phy_driver);
MODULE_DESCRIPTION("QCOM/IPQ4019 USB phy driver");
MODULE_AUTHOR("John Crispin <john@phrozen.org>");
MODULE_LICENSE("GPL v2");
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