1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c b/drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c
new file mode 100644
index 000000000..fc7f9df80
--- /dev/null
+++ b/drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c
@@ -0,0 +1,148 @@
+// 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 resource *res;
+	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;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	phy->base = devm_ioremap_resource(&pdev->dev, res);
+	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");