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146 lines
3.4 KiB
146 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2018 John Crispin <[email protected]> |
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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 <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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