1 // SPDX-License-Identifier: GPL-2.0
3  * Phy provider for USB 3.0 controller on HiSilicon 3660 platform
5  * Copyright (C) 2017-2018 Hilisicon Electronics Co., Ltd.
14 #include <linux/phy/phy.h>
54 /* This value config the default txtune parameter of the usb 2.0 phy */
65 static int hi3660_phy_init(struct phy *phy)  in hi3660_phy_init()  argument
67 	struct hi3660_priv *priv = phy_get_drvdata(phy);  in hi3660_phy_init()
71 	/* usb refclk iso disable */  in hi3660_phy_init()
72 	ret = regmap_write(priv->peri_crg, PERI_CRG_ISODIS, USB_REFCLK_ISO_EN);  in hi3660_phy_init()
78 	ret = regmap_write(priv->pctrl, PCTRL_PERI_CTRL3, val);  in hi3660_phy_init()
82 	/* assert phy */  in hi3660_phy_init()
84 	ret = regmap_write(priv->peri_crg, PERI_CRG_RSTEN4, val);  in hi3660_phy_init()
88 	/* enable phy ref clk */  in hi3660_phy_init()
91 	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL0, mask, val);  in hi3660_phy_init()
97 	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL7, mask, val);  in hi3660_phy_init()
103 	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL2, mask, 0);  in hi3660_phy_init()
110 	/* deassert phy */  in hi3660_phy_init()
112 	ret = regmap_write(priv->peri_crg, PERI_CRG_RSTDIS4, val);  in hi3660_phy_init()
116 	/* delay for phy deasserted */  in hi3660_phy_init()
122 	ret = regmap_update_bits(priv->otg_bc, USBOTG3_CTRL3, mask, val);  in hi3660_phy_init()
129 	ret = regmap_write(priv->otg_bc, USBOTG3_CTRL4,  in hi3660_phy_init()
130 			priv->eye_diagram_param);  in hi3660_phy_init()
136 	dev_err(priv->dev, "failed to init phy ret: %d\n", ret);  in hi3660_phy_init()
140 static int hi3660_phy_exit(struct phy *phy)  in hi3660_phy_exit()  argument
142 	struct hi3660_priv *priv = phy_get_drvdata(phy);  in hi3660_phy_exit()
146 	/* assert phy */  in hi3660_phy_exit()
148 	ret = regmap_write(priv->peri_crg, PERI_CRG_RSTEN4, val);  in hi3660_phy_exit()
154 	ret = regmap_write(priv->pctrl, PCTRL_PERI_CTRL3, val);  in hi3660_phy_exit()
160 	dev_err(priv->dev, "failed to exit phy ret: %d\n", ret);  in hi3660_phy_exit()
173 	struct device *dev = &pdev->dev;  in hi3660_phy_probe()
174 	struct phy *phy;  in hi3660_phy_probe()  local
179 		return -ENOMEM;  in hi3660_phy_probe()
181 	priv->dev = dev;  in hi3660_phy_probe()
182 	priv->peri_crg = syscon_regmap_lookup_by_phandle(dev->of_node,  in hi3660_phy_probe()
183 					"hisilicon,pericrg-syscon");  in hi3660_phy_probe()
184 	if (IS_ERR(priv->peri_crg)) {  in hi3660_phy_probe()
185 		dev_err(dev, "no hisilicon,pericrg-syscon\n");  in hi3660_phy_probe()
186 		return PTR_ERR(priv->peri_crg);  in hi3660_phy_probe()
189 	priv->pctrl = syscon_regmap_lookup_by_phandle(dev->of_node,  in hi3660_phy_probe()
190 					"hisilicon,pctrl-syscon");  in hi3660_phy_probe()
191 	if (IS_ERR(priv->pctrl)) {  in hi3660_phy_probe()
192 		dev_err(dev, "no hisilicon,pctrl-syscon\n");  in hi3660_phy_probe()
193 		return PTR_ERR(priv->pctrl);  in hi3660_phy_probe()
196 	/* node of hi3660 phy is a sub-node of usb3_otg_bc */  in hi3660_phy_probe()
197 	priv->otg_bc = syscon_node_to_regmap(dev->parent->of_node);  in hi3660_phy_probe()
198 	if (IS_ERR(priv->otg_bc)) {  in hi3660_phy_probe()
199 		dev_err(dev, "no hisilicon,usb3-otg-bc-syscon\n");  in hi3660_phy_probe()
200 		return PTR_ERR(priv->otg_bc);  in hi3660_phy_probe()
203 	if (of_property_read_u32(dev->of_node, "hisilicon,eye-diagram-param",  in hi3660_phy_probe()
204 		&(priv->eye_diagram_param)))  in hi3660_phy_probe()
205 		priv->eye_diagram_param = HI3660_USB_DEFAULT_PHY_PARAM;  in hi3660_phy_probe()
207 	phy = devm_phy_create(dev, NULL, &hi3660_phy_ops);  in hi3660_phy_probe()
208 	if (IS_ERR(phy))  in hi3660_phy_probe()
209 		return PTR_ERR(phy);  in hi3660_phy_probe()
211 	phy_set_drvdata(phy, priv);  in hi3660_phy_probe()
217 	{.compatible = "hisilicon,hi3660-usb-phy",},
225 		.name	= "hi3660-usb-phy",
233 MODULE_DESCRIPTION("Hilisicon Hi3660 USB3 PHY Driver");