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