147 строки
3.4 KiB
C
147 строки
3.4 KiB
C
// 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_platform.h>
|
|
#include <linux/of_device.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");
|