1 // SPDX-License-Identifier: GPL-2.0
3  * phy-uniphier-usb3ss.c - SS-PHY driver for Socionext UniPhier USB3 controller
4  * Copyright 2015-2018 Socionext Inc.
19 #include <linux/phy/phy.h>
73 	writel(data, priv->base + SSPHY_TESTI);  in uniphier_u3ssphy_testio_write()
74 	readl(priv->base + SSPHY_TESTO);  in uniphier_u3ssphy_testio_write()
75 	readl(priv->base + SSPHY_TESTO);  in uniphier_u3ssphy_testio_write()
82 	u8 field_mask = GENMASK(p->field.msb, p->field.lsb);  in uniphier_u3ssphy_set_param()
87 	val |= FIELD_PREP(TESTI_ADR_MASK, p->field.reg_no);  in uniphier_u3ssphy_set_param()
89 	val = readl(priv->base + SSPHY_TESTO) & TESTO_DAT_MASK;  in uniphier_u3ssphy_set_param()
93 	data = field_mask & (p->value << p->field.lsb);  in uniphier_u3ssphy_set_param()
95 	val |= FIELD_PREP(TESTI_ADR_MASK, p->field.reg_no);  in uniphier_u3ssphy_set_param()
102 	val |= FIELD_PREP(TESTI_ADR_MASK, p->field.reg_no);  in uniphier_u3ssphy_set_param()
104 	readl(priv->base + SSPHY_TESTO);  in uniphier_u3ssphy_set_param()
107 static int uniphier_u3ssphy_power_on(struct phy *phy)  in uniphier_u3ssphy_power_on()  argument
109 	struct uniphier_u3ssphy_priv *priv = phy_get_drvdata(phy);  in uniphier_u3ssphy_power_on()
112 	ret = clk_prepare_enable(priv->clk_ext);  in uniphier_u3ssphy_power_on()
116 	ret = clk_prepare_enable(priv->clk);  in uniphier_u3ssphy_power_on()
120 	ret = reset_control_deassert(priv->rst);  in uniphier_u3ssphy_power_on()
124 	if (priv->vbus) {  in uniphier_u3ssphy_power_on()
125 		ret = regulator_enable(priv->vbus);  in uniphier_u3ssphy_power_on()
133 	reset_control_assert(priv->rst);  in uniphier_u3ssphy_power_on()
135 	clk_disable_unprepare(priv->clk);  in uniphier_u3ssphy_power_on()
137 	clk_disable_unprepare(priv->clk_ext);  in uniphier_u3ssphy_power_on()
142 static int uniphier_u3ssphy_power_off(struct phy *phy)  in uniphier_u3ssphy_power_off()  argument
144 	struct uniphier_u3ssphy_priv *priv = phy_get_drvdata(phy);  in uniphier_u3ssphy_power_off()
146 	if (priv->vbus)  in uniphier_u3ssphy_power_off()
147 		regulator_disable(priv->vbus);  in uniphier_u3ssphy_power_off()
149 	reset_control_assert(priv->rst);  in uniphier_u3ssphy_power_off()
150 	clk_disable_unprepare(priv->clk);  in uniphier_u3ssphy_power_off()
151 	clk_disable_unprepare(priv->clk_ext);  in uniphier_u3ssphy_power_off()
156 static int uniphier_u3ssphy_init(struct phy *phy)  in uniphier_u3ssphy_init()  argument
158 	struct uniphier_u3ssphy_priv *priv = phy_get_drvdata(phy);  in uniphier_u3ssphy_init()
161 	ret = clk_prepare_enable(priv->clk_parent);  in uniphier_u3ssphy_init()
165 	ret = clk_prepare_enable(priv->clk_parent_gio);  in uniphier_u3ssphy_init()
169 	ret = reset_control_deassert(priv->rst_parent);  in uniphier_u3ssphy_init()
173 	ret = reset_control_deassert(priv->rst_parent_gio);  in uniphier_u3ssphy_init()
177 	if (priv->data->is_legacy)  in uniphier_u3ssphy_init()
180 	for (i = 0; i < priv->data->nparams; i++)  in uniphier_u3ssphy_init()
181 		uniphier_u3ssphy_set_param(priv, &priv->data->param[i]);  in uniphier_u3ssphy_init()
186 	reset_control_assert(priv->rst_parent);  in uniphier_u3ssphy_init()
188 	clk_disable_unprepare(priv->clk_parent_gio);  in uniphier_u3ssphy_init()
190 	clk_disable_unprepare(priv->clk_parent);  in uniphier_u3ssphy_init()
195 static int uniphier_u3ssphy_exit(struct phy *phy)  in uniphier_u3ssphy_exit()  argument
197 	struct uniphier_u3ssphy_priv *priv = phy_get_drvdata(phy);  in uniphier_u3ssphy_exit()
199 	reset_control_assert(priv->rst_parent_gio);  in uniphier_u3ssphy_exit()
200 	reset_control_assert(priv->rst_parent);  in uniphier_u3ssphy_exit()
201 	clk_disable_unprepare(priv->clk_parent_gio);  in uniphier_u3ssphy_exit()
202 	clk_disable_unprepare(priv->clk_parent);  in uniphier_u3ssphy_exit()
217 	struct device *dev = &pdev->dev;  in uniphier_u3ssphy_probe()
220 	struct phy *phy;  in uniphier_u3ssphy_probe()  local
224 		return -ENOMEM;  in uniphier_u3ssphy_probe()
226 	priv->dev = dev;  in uniphier_u3ssphy_probe()
227 	priv->data = of_device_get_match_data(dev);  in uniphier_u3ssphy_probe()
228 	if (WARN_ON(!priv->data ||  in uniphier_u3ssphy_probe()
229 		    priv->data->nparams > MAX_PHY_PARAMS))  in uniphier_u3ssphy_probe()
230 		return -EINVAL;  in uniphier_u3ssphy_probe()
232 	priv->base = devm_platform_ioremap_resource(pdev, 0);  in uniphier_u3ssphy_probe()
233 	if (IS_ERR(priv->base))  in uniphier_u3ssphy_probe()
234 		return PTR_ERR(priv->base);  in uniphier_u3ssphy_probe()
236 	if (!priv->data->is_legacy) {  in uniphier_u3ssphy_probe()
237 		priv->clk = devm_clk_get(dev, "phy");  in uniphier_u3ssphy_probe()
238 		if (IS_ERR(priv->clk))  in uniphier_u3ssphy_probe()
239 			return PTR_ERR(priv->clk);  in uniphier_u3ssphy_probe()
241 		priv->clk_ext = devm_clk_get_optional(dev, "phy-ext");  in uniphier_u3ssphy_probe()
242 		if (IS_ERR(priv->clk_ext))  in uniphier_u3ssphy_probe()
243 			return PTR_ERR(priv->clk_ext);  in uniphier_u3ssphy_probe()
245 		priv->rst = devm_reset_control_get_shared(dev, "phy");  in uniphier_u3ssphy_probe()
246 		if (IS_ERR(priv->rst))  in uniphier_u3ssphy_probe()
247 			return PTR_ERR(priv->rst);  in uniphier_u3ssphy_probe()
249 		priv->clk_parent_gio = devm_clk_get(dev, "gio");  in uniphier_u3ssphy_probe()
250 		if (IS_ERR(priv->clk_parent_gio))  in uniphier_u3ssphy_probe()
251 			return PTR_ERR(priv->clk_parent_gio);  in uniphier_u3ssphy_probe()
253 		priv->rst_parent_gio =  in uniphier_u3ssphy_probe()
255 		if (IS_ERR(priv->rst_parent_gio))  in uniphier_u3ssphy_probe()
256 			return PTR_ERR(priv->rst_parent_gio);  in uniphier_u3ssphy_probe()
259 	priv->clk_parent = devm_clk_get(dev, "link");  in uniphier_u3ssphy_probe()
260 	if (IS_ERR(priv->clk_parent))  in uniphier_u3ssphy_probe()
261 		return PTR_ERR(priv->clk_parent);  in uniphier_u3ssphy_probe()
263 	priv->rst_parent = devm_reset_control_get_shared(dev, "link");  in uniphier_u3ssphy_probe()
264 	if (IS_ERR(priv->rst_parent))  in uniphier_u3ssphy_probe()
265 		return PTR_ERR(priv->rst_parent);  in uniphier_u3ssphy_probe()
267 	priv->vbus = devm_regulator_get_optional(dev, "vbus");  in uniphier_u3ssphy_probe()
268 	if (IS_ERR(priv->vbus)) {  in uniphier_u3ssphy_probe()
269 		if (PTR_ERR(priv->vbus) == -EPROBE_DEFER)  in uniphier_u3ssphy_probe()
270 			return PTR_ERR(priv->vbus);  in uniphier_u3ssphy_probe()
271 		priv->vbus = NULL;  in uniphier_u3ssphy_probe()
274 	phy = devm_phy_create(dev, dev->of_node, &uniphier_u3ssphy_ops);  in uniphier_u3ssphy_probe()
275 	if (IS_ERR(phy))  in uniphier_u3ssphy_probe()
276 		return PTR_ERR(phy);  in uniphier_u3ssphy_probe()
278 	phy_set_drvdata(phy, priv);  in uniphier_u3ssphy_probe()
314 		.compatible = "socionext,uniphier-pro4-usb3-ssphy",
318 		.compatible = "socionext,uniphier-pro5-usb3-ssphy",
322 		.compatible = "socionext,uniphier-pxs2-usb3-ssphy",
326 		.compatible = "socionext,uniphier-ld20-usb3-ssphy",
330 		.compatible = "socionext,uniphier-pxs3-usb3-ssphy",
334 		.compatible = "socionext,uniphier-nx1-usb3-ssphy",
344 		.name = "uniphier-usb3-ssphy",
352 MODULE_DESCRIPTION("UniPhier SS-PHY driver for USB3 controller");