1 // SPDX-License-Identifier: GPL-2.0-only
22  * phy as being SR70LX Synopsys USB 2.0 OTG nanoPHY. It also seems at
23  * least dm816x rev c ignores writes to USB_CTRL register, but the TI
52 static int dm816x_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host)  in dm816x_usb_phy_set_host()  argument
54 	otg->host = host;  in dm816x_usb_phy_set_host()
56 		otg->state = OTG_STATE_UNDEFINED;  in dm816x_usb_phy_set_host()
61 static int dm816x_usb_phy_set_peripheral(struct usb_otg *otg,  in dm816x_usb_phy_set_peripheral()  argument
64 	otg->gadget = gadget;  in dm816x_usb_phy_set_peripheral()
66 		otg->state = OTG_STATE_UNDEFINED;  in dm816x_usb_phy_set_peripheral()
76 	if (clk_get_rate(phy->refclk) != 24000000)  in dm816x_usb_phy_init()
77 		dev_warn(phy->dev, "nonstandard phy refclk\n");  in dm816x_usb_phy_init()
80 	regmap_update_bits(phy->syscon, phy->usb_ctrl,  in dm816x_usb_phy_init()
85 	regmap_read(phy->syscon, phy->usb_ctrl, &val);  in dm816x_usb_phy_init()
87 		dev_info(phy->dev,  in dm816x_usb_phy_init()
96 	regmap_read(phy->syscon, phy->usbphy_ctrl, &val);  in dm816x_usb_phy_init()
100 	regmap_write(phy->syscon, phy->usbphy_ctrl, val);  in dm816x_usb_phy_init()
116 	mask = BIT(phy->instance);  in dm816x_usb_phy_runtime_suspend()
117 	val = ~BIT(phy->instance);  in dm816x_usb_phy_runtime_suspend()
118 	error = regmap_update_bits(phy->syscon, phy->usb_ctrl,  in dm816x_usb_phy_runtime_suspend()
121 		dev_err(phy->dev, "phy%i failed to power off\n",  in dm816x_usb_phy_runtime_suspend()
122 			phy->instance);  in dm816x_usb_phy_runtime_suspend()
123 	clk_disable(phy->refclk);  in dm816x_usb_phy_runtime_suspend()
134 	error = clk_enable(phy->refclk);  in dm816x_usb_phy_runtime_resume()
139 	 * Note that at least dm816x rev c does not seem to do  in dm816x_usb_phy_runtime_resume()
144 	mask = BIT(phy->instance);  in dm816x_usb_phy_runtime_resume()
145 	val = BIT(phy->instance);  in dm816x_usb_phy_runtime_resume()
146 	error = regmap_update_bits(phy->syscon, phy->usb_ctrl,  in dm816x_usb_phy_runtime_resume()
149 		dev_err(phy->dev, "phy%i failed to power on\n",  in dm816x_usb_phy_runtime_resume()
150 			phy->instance);  in dm816x_usb_phy_runtime_resume()
151 		clk_disable(phy->refclk);  in dm816x_usb_phy_runtime_resume()
165 		.compatible = "ti,dm8168-usb-phy",
177 	struct usb_otg *otg;  in dm816x_usb_phy_probe()  local
180 	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);  in dm816x_usb_phy_probe()
182 		return -ENOMEM;  in dm816x_usb_phy_probe()
186 		return -ENOENT;  in dm816x_usb_phy_probe()
188 	phy->syscon = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,  in dm816x_usb_phy_probe()
190 	if (IS_ERR(phy->syscon))  in dm816x_usb_phy_probe()
191 		return PTR_ERR(phy->syscon);  in dm816x_usb_phy_probe()
198 	phy->usb_ctrl = 0x20;  in dm816x_usb_phy_probe()
199 	phy->usbphy_ctrl = (res->start & 0xff) + 4;  in dm816x_usb_phy_probe()
200 	if (phy->usbphy_ctrl == 0x2c)  in dm816x_usb_phy_probe()
201 		phy->instance = 1;  in dm816x_usb_phy_probe()
203 	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);  in dm816x_usb_phy_probe()
204 	if (!otg)  in dm816x_usb_phy_probe()
205 		return -ENOMEM;  in dm816x_usb_phy_probe()
207 	phy->dev = &pdev->dev;  in dm816x_usb_phy_probe()
208 	phy->phy.dev = phy->dev;  in dm816x_usb_phy_probe()
209 	phy->phy.label = "dm8168_usb_phy";  in dm816x_usb_phy_probe()
210 	phy->phy.otg = otg;  in dm816x_usb_phy_probe()
211 	phy->phy.type = USB_PHY_TYPE_USB2;  in dm816x_usb_phy_probe()
212 	otg->set_host = dm816x_usb_phy_set_host;  in dm816x_usb_phy_probe()
213 	otg->set_peripheral = dm816x_usb_phy_set_peripheral;  in dm816x_usb_phy_probe()
214 	otg->usb_phy = &phy->phy;  in dm816x_usb_phy_probe()
218 	phy->refclk = devm_clk_get(phy->dev, "refclk");  in dm816x_usb_phy_probe()
219 	if (IS_ERR(phy->refclk))  in dm816x_usb_phy_probe()
220 		return PTR_ERR(phy->refclk);  in dm816x_usb_phy_probe()
221 	error = clk_prepare(phy->refclk);  in dm816x_usb_phy_probe()
225 	pm_runtime_enable(phy->dev);  in dm816x_usb_phy_probe()
226 	generic_phy = devm_phy_create(phy->dev, NULL, &ops);  in dm816x_usb_phy_probe()
234 	phy_provider = devm_of_phy_provider_register(phy->dev,  in dm816x_usb_phy_probe()
241 	usb_add_phy_dev(&phy->phy);  in dm816x_usb_phy_probe()
246 	pm_runtime_disable(phy->dev);  in dm816x_usb_phy_probe()
247 	clk_unprepare(phy->refclk);  in dm816x_usb_phy_probe()
255 	usb_remove_phy(&phy->phy);  in dm816x_usb_phy_remove()
256 	pm_runtime_disable(phy->dev);  in dm816x_usb_phy_remove()
257 	clk_unprepare(phy->refclk);  in dm816x_usb_phy_remove()
264 		.name	= "dm816x-usb-phy",