1 // SPDX-License-Identifier: GPL-2.0+
3  * StarFive JH7110 USB 2.0 PHY driver
14 #include <linux/phy/phy.h>
25 	struct phy *phy;  member
29 	enum phy_mode mode;  member
32 static void usb2_set_ls_keepalive(struct jh7110_usb2_phy *phy, bool set)  in usb2_set_ls_keepalive()  argument
36 	/* Host mode enable the LS speed keep-alive signal */  in usb2_set_ls_keepalive()
37 	val = readl(phy->regs + USB_LS_KEEPALIVE_OFF);  in usb2_set_ls_keepalive()
43 	writel(val, phy->regs + USB_LS_KEEPALIVE_OFF);  in usb2_set_ls_keepalive()
46 static int usb2_phy_set_mode(struct phy *_phy,  in usb2_phy_set_mode()
47 			     enum phy_mode mode, int submode)  in usb2_phy_set_mode()  argument
49 	struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);  in usb2_phy_set_mode()  local
51 	switch (mode) {  in usb2_phy_set_mode()
57 		return -EINVAL;  in usb2_phy_set_mode()
60 	if (mode != phy->mode) {  in usb2_phy_set_mode()
61 		dev_dbg(&_phy->dev, "Changing phy to %d\n", mode);  in usb2_phy_set_mode()
62 		phy->mode = mode;  in usb2_phy_set_mode()
63 		usb2_set_ls_keepalive(phy, (mode != PHY_MODE_USB_DEVICE));  in usb2_phy_set_mode()
69 static int jh7110_usb2_phy_init(struct phy *_phy)  in jh7110_usb2_phy_init()
71 	struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);  in jh7110_usb2_phy_init()  local
75 	ret = clk_set_rate(phy->usb_125m_clk, USB_125M_CLK_RATE);  in jh7110_usb2_phy_init()
79 	ret = clk_prepare_enable(phy->app_125m);  in jh7110_usb2_phy_init()
83 	val = readl(phy->regs + USB_CLK_MODE_OFF);  in jh7110_usb2_phy_init()
85 	writel(val, phy->regs + USB_CLK_MODE_OFF);  in jh7110_usb2_phy_init()
90 static int jh7110_usb2_phy_exit(struct phy *_phy)  in jh7110_usb2_phy_exit()
92 	struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);  in jh7110_usb2_phy_exit()  local
94 	clk_disable_unprepare(phy->app_125m);  in jh7110_usb2_phy_exit()
108 	struct jh7110_usb2_phy *phy;  in jh7110_usb_phy_probe()  local
109 	struct device *dev = &pdev->dev;  in jh7110_usb_phy_probe()
112 	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);  in jh7110_usb_phy_probe()
113 	if (!phy)  in jh7110_usb_phy_probe()
114 		return -ENOMEM;  in jh7110_usb_phy_probe()
116 	phy->usb_125m_clk = devm_clk_get(dev, "125m");  in jh7110_usb_phy_probe()
117 	if (IS_ERR(phy->usb_125m_clk))  in jh7110_usb_phy_probe()
118 		return dev_err_probe(dev, PTR_ERR(phy->usb_125m_clk),  in jh7110_usb_phy_probe()
121 	phy->app_125m = devm_clk_get(dev, "app_125m");  in jh7110_usb_phy_probe()
122 	if (IS_ERR(phy->app_125m))  in jh7110_usb_phy_probe()
123 		return dev_err_probe(dev, PTR_ERR(phy->app_125m),  in jh7110_usb_phy_probe()
126 	phy->regs = devm_platform_ioremap_resource(pdev, 0);  in jh7110_usb_phy_probe()
127 	if (IS_ERR(phy->regs))  in jh7110_usb_phy_probe()
128 		return dev_err_probe(dev, PTR_ERR(phy->regs),  in jh7110_usb_phy_probe()
129 			"Failed to map phy base\n");  in jh7110_usb_phy_probe()
131 	phy->phy = devm_phy_create(dev, NULL, &jh7110_usb2_phy_ops);  in jh7110_usb_phy_probe()
132 	if (IS_ERR(phy->phy))  in jh7110_usb_phy_probe()
133 		return dev_err_probe(dev, PTR_ERR(phy->phy),  in jh7110_usb_phy_probe()
134 			"Failed to create phy\n");  in jh7110_usb_phy_probe()
136 	phy_set_drvdata(phy->phy, phy);  in jh7110_usb_phy_probe()
143 	{ .compatible = "starfive,jh7110-usb-phy" },
152 		.name  = "jh7110-usb-phy",
157 MODULE_DESCRIPTION("StarFive JH7110 USB 2.0 PHY driver");