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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2018 John Crispin <john@phrozen.org>4 *5 * Based on code from6 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>7 *8 */9 10#include <linux/delay.h>11#include <linux/err.h>12#include <linux/io.h>13#include <linux/kernel.h>14#include <linux/module.h>15#include <linux/mutex.h>16#include <linux/of.h>17#include <linux/phy/phy.h>18#include <linux/platform_device.h>19#include <linux/reset.h>20 21struct ipq4019_usb_phy {22 struct device *dev;23 struct phy *phy;24 void __iomem *base;25 struct reset_control *por_rst;26 struct reset_control *srif_rst;27};28 29static int ipq4019_ss_phy_power_off(struct phy *_phy)30{31 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);32 33 reset_control_assert(phy->por_rst);34 msleep(10);35 36 return 0;37}38 39static int ipq4019_ss_phy_power_on(struct phy *_phy)40{41 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);42 43 ipq4019_ss_phy_power_off(_phy);44 45 reset_control_deassert(phy->por_rst);46 47 return 0;48}49 50static const struct phy_ops ipq4019_usb_ss_phy_ops = {51 .power_on = ipq4019_ss_phy_power_on,52 .power_off = ipq4019_ss_phy_power_off,53};54 55static int ipq4019_hs_phy_power_off(struct phy *_phy)56{57 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);58 59 reset_control_assert(phy->por_rst);60 msleep(10);61 62 reset_control_assert(phy->srif_rst);63 msleep(10);64 65 return 0;66}67 68static int ipq4019_hs_phy_power_on(struct phy *_phy)69{70 struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);71 72 ipq4019_hs_phy_power_off(_phy);73 74 reset_control_deassert(phy->srif_rst);75 msleep(10);76 77 reset_control_deassert(phy->por_rst);78 79 return 0;80}81 82static const struct phy_ops ipq4019_usb_hs_phy_ops = {83 .power_on = ipq4019_hs_phy_power_on,84 .power_off = ipq4019_hs_phy_power_off,85};86 87static const struct of_device_id ipq4019_usb_phy_of_match[] = {88 { .compatible = "qcom,usb-hs-ipq4019-phy", .data = &ipq4019_usb_hs_phy_ops},89 { .compatible = "qcom,usb-ss-ipq4019-phy", .data = &ipq4019_usb_ss_phy_ops},90 { },91};92MODULE_DEVICE_TABLE(of, ipq4019_usb_phy_of_match);93 94static int ipq4019_usb_phy_probe(struct platform_device *pdev)95{96 struct device *dev = &pdev->dev;97 struct phy_provider *phy_provider;98 struct ipq4019_usb_phy *phy;99 100 phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);101 if (!phy)102 return -ENOMEM;103 104 phy->dev = &pdev->dev;105 phy->base = devm_platform_ioremap_resource(pdev, 0);106 if (IS_ERR(phy->base)) {107 dev_err(dev, "failed to remap register memory\n");108 return PTR_ERR(phy->base);109 }110 111 phy->por_rst = devm_reset_control_get(phy->dev, "por_rst");112 if (IS_ERR(phy->por_rst)) {113 if (PTR_ERR(phy->por_rst) != -EPROBE_DEFER)114 dev_err(dev, "POR reset is missing\n");115 return PTR_ERR(phy->por_rst);116 }117 118 phy->srif_rst = devm_reset_control_get_optional(phy->dev, "srif_rst");119 if (IS_ERR(phy->srif_rst))120 return PTR_ERR(phy->srif_rst);121 122 phy->phy = devm_phy_create(dev, NULL, of_device_get_match_data(dev));123 if (IS_ERR(phy->phy)) {124 dev_err(dev, "failed to create PHY\n");125 return PTR_ERR(phy->phy);126 }127 phy_set_drvdata(phy->phy, phy);128 129 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);130 131 return PTR_ERR_OR_ZERO(phy_provider);132}133 134static struct platform_driver ipq4019_usb_phy_driver = {135 .probe = ipq4019_usb_phy_probe,136 .driver = {137 .of_match_table = ipq4019_usb_phy_of_match,138 .name = "ipq4019-usb-phy",139 }140};141module_platform_driver(ipq4019_usb_phy_driver);142 143MODULE_DESCRIPTION("QCOM/IPQ4019 USB phy driver");144MODULE_AUTHOR("John Crispin <john@phrozen.org>");145MODULE_LICENSE("GPL v2");146