1 // SPDX-License-Identifier: GPL-2.0
3  * Support for usb functionality of Hikey series boards
6  * Copyright (C) 2017-2018 Hilisicon Electronics Co., Ltd.
22 #include <linux/usb/role.h>
45 	enum usb_role role;  member
57 	if (hisi_hikey_usb->hub_vbus)  in hub_power_ctrl()
58 		gpiod_set_value_cansleep(hisi_hikey_usb->hub_vbus, value);  in hub_power_ctrl()
60 	if (!hisi_hikey_usb->regulator)  in hub_power_ctrl()
63 	status = regulator_is_enabled(hisi_hikey_usb->regulator);  in hub_power_ctrl()
68 		ret = regulator_enable(hisi_hikey_usb->regulator);  in hub_power_ctrl()
70 		ret = regulator_disable(hisi_hikey_usb->regulator);  in hub_power_ctrl()
73 		dev_err(hisi_hikey_usb->dev,  in hub_power_ctrl()
74 			"Can't switch regulator state to %s\n",  in hub_power_ctrl()
81 	if (!hisi_hikey_usb->otg_switch)  in usb_switch_ctrl()
84 	gpiod_set_value_cansleep(hisi_hikey_usb->otg_switch, switch_to);  in usb_switch_ctrl()
90 	if (!hisi_hikey_usb->typec_vbus)  in usb_typec_power_ctrl()
93 	gpiod_set_value_cansleep(hisi_hikey_usb->typec_vbus, value);  in usb_typec_power_ctrl()
102 	enum usb_role role;  in relay_set_role_switch()  local
104 	if (!hisi_hikey_usb || !hisi_hikey_usb->dev_role_sw)  in relay_set_role_switch()
107 	mutex_lock(&hisi_hikey_usb->lock);  in relay_set_role_switch()
108 	switch (hisi_hikey_usb->role) {  in relay_set_role_switch()
127 	sw = hisi_hikey_usb->dev_role_sw;  in relay_set_role_switch()
128 	role = hisi_hikey_usb->role;  in relay_set_role_switch()
129 	mutex_unlock(&hisi_hikey_usb->lock);  in relay_set_role_switch()
131 	usb_role_switch_set_role(sw, role);  in relay_set_role_switch()
134 static int hub_usb_role_switch_set(struct usb_role_switch *sw, enum usb_role role)  in hub_usb_role_switch_set()  argument
138 	if (!hisi_hikey_usb || !hisi_hikey_usb->dev_role_sw)  in hub_usb_role_switch_set()
139 		return -EINVAL;  in hub_usb_role_switch_set()
141 	mutex_lock(&hisi_hikey_usb->lock);  in hub_usb_role_switch_set()
142 	hisi_hikey_usb->role = role;  in hub_usb_role_switch_set()
143 	mutex_unlock(&hisi_hikey_usb->lock);  in hub_usb_role_switch_set()
145 	schedule_work(&hisi_hikey_usb->work);  in hub_usb_role_switch_set()
155 	regulator = devm_regulator_get(&pdev->dev, "hub-vdd");  in hisi_hikey_usb_parse_kirin970()
157 		if (PTR_ERR(regulator) == -EPROBE_DEFER) {  in hisi_hikey_usb_parse_kirin970()
158 			dev_info(&pdev->dev,  in hisi_hikey_usb_parse_kirin970()
159 				 "waiting for hub-vdd-supply to be probed\n");  in hisi_hikey_usb_parse_kirin970()
162 		dev_err(&pdev->dev,  in hisi_hikey_usb_parse_kirin970()
163 			"get hub-vdd-supply failed with error %ld\n",  in hisi_hikey_usb_parse_kirin970()
167 	hisi_hikey_usb->regulator = regulator;  in hisi_hikey_usb_parse_kirin970()
169 	hisi_hikey_usb->reset = devm_gpiod_get(&pdev->dev, "hub_reset_en_gpio",  in hisi_hikey_usb_parse_kirin970()
171 	if (IS_ERR(hisi_hikey_usb->reset))  in hisi_hikey_usb_parse_kirin970()
172 		return PTR_ERR(hisi_hikey_usb->reset);  in hisi_hikey_usb_parse_kirin970()
179 	struct device *dev = &pdev->dev;  in hisi_hikey_usb_probe()
186 		return -ENOMEM;  in hisi_hikey_usb_probe()
188 	hisi_hikey_usb->dev = &pdev->dev;  in hisi_hikey_usb_probe()
190 	hisi_hikey_usb->otg_switch = devm_gpiod_get(dev, "otg-switch",  in hisi_hikey_usb_probe()
192 	if (IS_ERR(hisi_hikey_usb->otg_switch))  in hisi_hikey_usb_probe()
193 		return PTR_ERR(hisi_hikey_usb->otg_switch);  in hisi_hikey_usb_probe()
195 	hisi_hikey_usb->typec_vbus = devm_gpiod_get(dev, "typec-vbus",  in hisi_hikey_usb_probe()
197 	if (IS_ERR(hisi_hikey_usb->typec_vbus))  in hisi_hikey_usb_probe()
198 		return PTR_ERR(hisi_hikey_usb->typec_vbus);  in hisi_hikey_usb_probe()
200 	/* Parse Kirin 970-specific OF data */  in hisi_hikey_usb_probe()
201 	if (of_device_is_compatible(pdev->dev.of_node,  in hisi_hikey_usb_probe()
207 		/* hub-vdd33-en is optional */  in hisi_hikey_usb_probe()
208 		hisi_hikey_usb->hub_vbus = devm_gpiod_get_optional(dev, "hub-vdd33-en",  in hisi_hikey_usb_probe()
210 		if (IS_ERR(hisi_hikey_usb->hub_vbus))  in hisi_hikey_usb_probe()
211 			return PTR_ERR(hisi_hikey_usb->hub_vbus);  in hisi_hikey_usb_probe()
214 	hisi_hikey_usb->dev_role_sw = usb_role_switch_get(dev);  in hisi_hikey_usb_probe()
215 	if (!hisi_hikey_usb->dev_role_sw)  in hisi_hikey_usb_probe()
216 		return -EPROBE_DEFER;  in hisi_hikey_usb_probe()
217 	if (IS_ERR(hisi_hikey_usb->dev_role_sw))  in hisi_hikey_usb_probe()
218 		return PTR_ERR(hisi_hikey_usb->dev_role_sw);  in hisi_hikey_usb_probe()
220 	INIT_WORK(&hisi_hikey_usb->work, relay_set_role_switch);  in hisi_hikey_usb_probe()
221 	mutex_init(&hisi_hikey_usb->lock);  in hisi_hikey_usb_probe()
227 	hisi_hikey_usb->hub_role_sw = usb_role_switch_register(dev,  in hisi_hikey_usb_probe()
230 	if (IS_ERR(hisi_hikey_usb->hub_role_sw)) {  in hisi_hikey_usb_probe()
231 		usb_role_switch_put(hisi_hikey_usb->dev_role_sw);  in hisi_hikey_usb_probe()
232 		return PTR_ERR(hisi_hikey_usb->hub_role_sw);  in hisi_hikey_usb_probe()
244 	if (hisi_hikey_usb->hub_role_sw)  in hisi_hikey_usb_remove()
245 		usb_role_switch_unregister(hisi_hikey_usb->hub_role_sw);  in hisi_hikey_usb_remove()
247 	if (hisi_hikey_usb->dev_role_sw)  in hisi_hikey_usb_remove()
248 		usb_role_switch_put(hisi_hikey_usb->dev_role_sw);  in hisi_hikey_usb_remove()
272 MODULE_DESCRIPTION("Driver Support for USB functionality of Hikey");