1 // SPDX-License-Identifier: GPL-2.0+
3  * StarFive JH7110 USB 2.0 PHY driver
15 #include <linux/phy/phy.h>
30 	struct phy *phy;  member
35 	enum phy_mode mode;  member
38 static void usb2_set_ls_keepalive(struct jh7110_usb2_phy *phy, bool set)  in usb2_set_ls_keepalive()  argument
42 	/* Host mode enable the LS speed keep-alive signal */  in usb2_set_ls_keepalive()
43 	val = readl(phy->regs + USB_LS_KEEPALIVE_OFF);  in usb2_set_ls_keepalive()
49 	writel(val, phy->regs + USB_LS_KEEPALIVE_OFF);  in usb2_set_ls_keepalive()
52 static int usb2_phy_set_mode(struct phy *_phy,  in usb2_phy_set_mode()
53 			     enum phy_mode mode, int submode)  in usb2_phy_set_mode()  argument
55 	struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);  in usb2_phy_set_mode()  local
57 	switch (mode) {  in usb2_phy_set_mode()
63 		return -EINVAL;  in usb2_phy_set_mode()
66 	if (mode != phy->mode) {  in usb2_phy_set_mode()
67 		dev_dbg(&_phy->dev, "Changing phy to %d\n", mode);  in usb2_phy_set_mode()
68 		phy->mode = mode;  in usb2_phy_set_mode()
69 		usb2_set_ls_keepalive(phy, (mode != PHY_MODE_USB_DEVICE));  in usb2_phy_set_mode()
72 	/* Connect usb 2.0 phy mode */  in usb2_phy_set_mode()
73 	regmap_update_bits(phy->sys_syscon, SYSCON_USB_SPLIT_OFFSET,  in usb2_phy_set_mode()
79 static int jh7110_usb2_phy_init(struct phy *_phy)  in jh7110_usb2_phy_init()
81 	struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);  in jh7110_usb2_phy_init()  local
85 	ret = clk_set_rate(phy->usb_125m_clk, USB_125M_CLK_RATE);  in jh7110_usb2_phy_init()
89 	ret = clk_prepare_enable(phy->app_125m);  in jh7110_usb2_phy_init()
93 	val = readl(phy->regs + USB_CLK_MODE_OFF);  in jh7110_usb2_phy_init()
95 	writel(val, phy->regs + USB_CLK_MODE_OFF);  in jh7110_usb2_phy_init()
100 static int jh7110_usb2_phy_exit(struct phy *_phy)  in jh7110_usb2_phy_exit()
102 	struct jh7110_usb2_phy *phy = phy_get_drvdata(_phy);  in jh7110_usb2_phy_exit()  local
104 	clk_disable_unprepare(phy->app_125m);  in jh7110_usb2_phy_exit()
118 	struct jh7110_usb2_phy *phy;  in jh7110_usb_phy_probe()  local
119 	struct device *dev = &pdev->dev;  in jh7110_usb_phy_probe()
122 	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);  in jh7110_usb_phy_probe()
123 	if (!phy)  in jh7110_usb_phy_probe()
124 		return -ENOMEM;  in jh7110_usb_phy_probe()
126 	phy->usb_125m_clk = devm_clk_get(dev, "125m");  in jh7110_usb_phy_probe()
127 	if (IS_ERR(phy->usb_125m_clk))  in jh7110_usb_phy_probe()
128 		return dev_err_probe(dev, PTR_ERR(phy->usb_125m_clk),  in jh7110_usb_phy_probe()
131 	phy->app_125m = devm_clk_get(dev, "app_125m");  in jh7110_usb_phy_probe()
132 	if (IS_ERR(phy->app_125m))  in jh7110_usb_phy_probe()
133 		return dev_err_probe(dev, PTR_ERR(phy->app_125m),  in jh7110_usb_phy_probe()
136 	phy->regs = devm_platform_ioremap_resource(pdev, 0);  in jh7110_usb_phy_probe()
137 	if (IS_ERR(phy->regs))  in jh7110_usb_phy_probe()
138 		return dev_err_probe(dev, PTR_ERR(phy->regs),  in jh7110_usb_phy_probe()
139 			"Failed to map phy base\n");  in jh7110_usb_phy_probe()
141 	phy->phy = devm_phy_create(dev, NULL, &jh7110_usb2_phy_ops);  in jh7110_usb_phy_probe()
142 	if (IS_ERR(phy->phy))  in jh7110_usb_phy_probe()
143 		return dev_err_probe(dev, PTR_ERR(phy->phy),  in jh7110_usb_phy_probe()
144 			"Failed to create phy\n");  in jh7110_usb_phy_probe()
146 	phy_set_drvdata(phy->phy, phy);  in jh7110_usb_phy_probe()
149 	phy->sys_syscon =  in jh7110_usb_phy_probe()
150 		syscon_regmap_lookup_by_compatible("starfive,jh7110-sys-syscon");  in jh7110_usb_phy_probe()
151 	if (IS_ERR(phy->sys_syscon))  in jh7110_usb_phy_probe()
152 		return dev_err_probe(dev, PTR_ERR(phy->sys_syscon),  in jh7110_usb_phy_probe()
153 				     "Failed to get sys-syscon\n");  in jh7110_usb_phy_probe()
159 	{ .compatible = "starfive,jh7110-usb-phy" },
168 		.name  = "jh7110-usb-phy",
173 MODULE_DESCRIPTION("StarFive JH7110 USB 2.0 PHY driver");