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.
21 #include <linux/usb/role.h>
55 	if (!hisi_hikey_usb->regulator)  in hub_power_ctrl()
58 	status = regulator_is_enabled(hisi_hikey_usb->regulator);  in hub_power_ctrl()
63 		ret = regulator_enable(hisi_hikey_usb->regulator);  in hub_power_ctrl()
65 		ret = regulator_disable(hisi_hikey_usb->regulator);  in hub_power_ctrl()
68 		dev_err(hisi_hikey_usb->dev,  in hub_power_ctrl()
76 	if (!hisi_hikey_usb->otg_switch)  in usb_switch_ctrl()
79 	gpiod_set_value_cansleep(hisi_hikey_usb->otg_switch, switch_to);  in usb_switch_ctrl()
85 	if (!hisi_hikey_usb->typec_vbus)  in usb_typec_power_ctrl()
88 	gpiod_set_value_cansleep(hisi_hikey_usb->typec_vbus, value);  in usb_typec_power_ctrl()
99 	if (!hisi_hikey_usb || !hisi_hikey_usb->dev_role_sw)  in relay_set_role_switch()
102 	mutex_lock(&hisi_hikey_usb->lock);  in relay_set_role_switch()
103 	switch (hisi_hikey_usb->role) {  in relay_set_role_switch()
122 	sw = hisi_hikey_usb->dev_role_sw;  in relay_set_role_switch()
123 	role = hisi_hikey_usb->role;  in relay_set_role_switch()
124 	mutex_unlock(&hisi_hikey_usb->lock);  in relay_set_role_switch()
133 	if (!hisi_hikey_usb || !hisi_hikey_usb->dev_role_sw)  in hub_usb_role_switch_set()
134 		return -EINVAL;  in hub_usb_role_switch_set()
136 	mutex_lock(&hisi_hikey_usb->lock);  in hub_usb_role_switch_set()
137 	hisi_hikey_usb->role = role;  in hub_usb_role_switch_set()
138 	mutex_unlock(&hisi_hikey_usb->lock);  in hub_usb_role_switch_set()
140 	schedule_work(&hisi_hikey_usb->work);  in hub_usb_role_switch_set()
148 	struct device *dev = &pdev->dev;  in hisi_hikey_usb_of_role_switch()
151 	if (!device_property_read_bool(dev, "usb-role-switch"))  in hisi_hikey_usb_of_role_switch()
154 	hisi_hikey_usb->otg_switch = devm_gpiod_get(dev, "otg-switch",  in hisi_hikey_usb_of_role_switch()
156 	if (IS_ERR(hisi_hikey_usb->otg_switch)) {  in hisi_hikey_usb_of_role_switch()
157 		dev_err(dev, "get otg-switch failed with error %ld\n",  in hisi_hikey_usb_of_role_switch()
158 			PTR_ERR(hisi_hikey_usb->otg_switch));  in hisi_hikey_usb_of_role_switch()
159 		return PTR_ERR(hisi_hikey_usb->otg_switch);  in hisi_hikey_usb_of_role_switch()
162 	hisi_hikey_usb->typec_vbus = devm_gpiod_get(dev, "typec-vbus",  in hisi_hikey_usb_of_role_switch()
164 	if (IS_ERR(hisi_hikey_usb->typec_vbus)) {  in hisi_hikey_usb_of_role_switch()
165 		dev_err(dev, "get typec-vbus failed with error %ld\n",  in hisi_hikey_usb_of_role_switch()
166 			PTR_ERR(hisi_hikey_usb->typec_vbus));  in hisi_hikey_usb_of_role_switch()
167 		return PTR_ERR(hisi_hikey_usb->typec_vbus);  in hisi_hikey_usb_of_role_switch()
170 	hisi_hikey_usb->reset = devm_gpiod_get_optional(dev,  in hisi_hikey_usb_of_role_switch()
171 							"hub-reset-en",  in hisi_hikey_usb_of_role_switch()
173 	if (IS_ERR(hisi_hikey_usb->reset)) {  in hisi_hikey_usb_of_role_switch()
174 		dev_err(dev, "get hub-reset-en failed with error %ld\n",  in hisi_hikey_usb_of_role_switch()
175 			PTR_ERR(hisi_hikey_usb->reset));  in hisi_hikey_usb_of_role_switch()
176 		return PTR_ERR(hisi_hikey_usb->reset);  in hisi_hikey_usb_of_role_switch()
179 	hisi_hikey_usb->dev_role_sw = usb_role_switch_get(dev);  in hisi_hikey_usb_of_role_switch()
180 	if (!hisi_hikey_usb->dev_role_sw)  in hisi_hikey_usb_of_role_switch()
181 		return -EPROBE_DEFER;  in hisi_hikey_usb_of_role_switch()
182 	if (IS_ERR(hisi_hikey_usb->dev_role_sw)) {  in hisi_hikey_usb_of_role_switch()
184 			PTR_ERR(hisi_hikey_usb->dev_role_sw));  in hisi_hikey_usb_of_role_switch()
185 		return PTR_ERR(hisi_hikey_usb->dev_role_sw);  in hisi_hikey_usb_of_role_switch()
188 	INIT_WORK(&hisi_hikey_usb->work, relay_set_role_switch);  in hisi_hikey_usb_of_role_switch()
194 	hisi_hikey_usb->hub_role_sw = usb_role_switch_register(dev,  in hisi_hikey_usb_of_role_switch()
197 	if (IS_ERR(hisi_hikey_usb->hub_role_sw)) {  in hisi_hikey_usb_of_role_switch()
200 			PTR_ERR(hisi_hikey_usb->hub_role_sw));  in hisi_hikey_usb_of_role_switch()
201 		usb_role_switch_put(hisi_hikey_usb->dev_role_sw);  in hisi_hikey_usb_of_role_switch()
202 		return PTR_ERR(hisi_hikey_usb->hub_role_sw);  in hisi_hikey_usb_of_role_switch()
210 	struct device *dev = &pdev->dev;  in hisi_hikey_usb_probe()
216 		return -ENOMEM;  in hisi_hikey_usb_probe()
218 	hisi_hikey_usb->dev = &pdev->dev;  in hisi_hikey_usb_probe()
219 	mutex_init(&hisi_hikey_usb->lock);  in hisi_hikey_usb_probe()
221 	hisi_hikey_usb->regulator = devm_regulator_get(dev, "hub-vdd");  in hisi_hikey_usb_probe()
222 	if (IS_ERR(hisi_hikey_usb->regulator)) {  in hisi_hikey_usb_probe()
223 		if (PTR_ERR(hisi_hikey_usb->regulator) == -EPROBE_DEFER) {  in hisi_hikey_usb_probe()
224 			dev_info(dev, "waiting for hub-vdd-supply\n");  in hisi_hikey_usb_probe()
225 			return PTR_ERR(hisi_hikey_usb->regulator);  in hisi_hikey_usb_probe()
227 		dev_err(dev, "get hub-vdd-supply failed with error %ld\n",  in hisi_hikey_usb_probe()
228 			PTR_ERR(hisi_hikey_usb->regulator));  in hisi_hikey_usb_probe()
229 		return PTR_ERR(hisi_hikey_usb->regulator);  in hisi_hikey_usb_probe()
245 	if (hisi_hikey_usb->hub_role_sw) {  in hisi_hikey_usb_remove()
246 		usb_role_switch_unregister(hisi_hikey_usb->hub_role_sw);  in hisi_hikey_usb_remove()
248 		if (hisi_hikey_usb->dev_role_sw)  in hisi_hikey_usb_remove()
249 			usb_role_switch_put(hisi_hikey_usb->dev_role_sw);  in hisi_hikey_usb_remove()
273 MODULE_DESCRIPTION("Driver Support for USB functionality of Hikey");