Lines Matching +full:vbus +full:- +full:gpio
1 // SPDX-License-Identifier: GPL-2.0
3 * USB GPIO Based Connection Detection Driver
9 * Some code borrowed from drivers/extcon/extcon-usb-gpio.c
13 #include <linux/gpio/consumer.h>
35 int conn_id; /* store the IDA-allocated ID */
38 struct regulator *vbus; member
53 * "DEVICE" = VBUS and "HOST" = !ID, so we have:
56 * even if VBUS is on.
58 * Role | ID | VBUS
59 * ------------------------------------
66 * - VBUS only - we want to distinguish between [1] and [2], so ID is always 1
67 * - ID only - we want to distinguish between [1] and [4], so VBUS = ID
73 int id, vbus, ret; in usb_conn_detect_cable() local
78 /* check ID and VBUS */ in usb_conn_detect_cable()
79 id = info->id_gpiod ? in usb_conn_detect_cable()
80 gpiod_get_value_cansleep(info->id_gpiod) : 1; in usb_conn_detect_cable()
81 vbus = info->vbus_gpiod ? in usb_conn_detect_cable()
82 gpiod_get_value_cansleep(info->vbus_gpiod) : id; in usb_conn_detect_cable()
86 else if (vbus) in usb_conn_detect_cable()
91 dev_dbg(info->dev, "role %s -> %s, gpios: id %d, vbus %d\n", in usb_conn_detect_cable()
92 usb_role_string(info->last_role), usb_role_string(role), id, vbus); in usb_conn_detect_cable()
94 if (!info->initial_detection && info->last_role == role) { in usb_conn_detect_cable()
95 dev_warn(info->dev, "repeated role: %s\n", usb_role_string(role)); in usb_conn_detect_cable()
99 info->initial_detection = false; in usb_conn_detect_cable()
101 if (info->last_role == USB_ROLE_HOST && info->vbus) in usb_conn_detect_cable()
102 regulator_disable(info->vbus); in usb_conn_detect_cable()
104 ret = usb_role_switch_set_role(info->role_sw, role); in usb_conn_detect_cable()
106 dev_err(info->dev, "failed to set role: %d\n", ret); in usb_conn_detect_cable()
108 if (role == USB_ROLE_HOST && info->vbus) { in usb_conn_detect_cable()
109 ret = regulator_enable(info->vbus); in usb_conn_detect_cable()
111 dev_err(info->dev, "enable vbus regulator failed\n"); in usb_conn_detect_cable()
114 info->last_role = role; in usb_conn_detect_cable()
116 if (info->vbus) in usb_conn_detect_cable()
117 dev_dbg(info->dev, "vbus regulator is %s\n", in usb_conn_detect_cable()
118 regulator_is_enabled(info->vbus) ? "enabled" : "disabled"); in usb_conn_detect_cable()
120 power_supply_changed(info->charger); in usb_conn_detect_cable()
126 queue_delayed_work(system_power_efficient_wq, &info->dw_det, delay); in usb_conn_queue_dwork()
133 usb_conn_queue_dwork(info, info->debounce_jiffies); in usb_conn_isr()
150 val->intval = info->last_role == USB_ROLE_DEVICE; in usb_charger_get_property()
153 return -EINVAL; in usb_charger_get_property()
161 struct device *dev = info->dev; in usb_conn_psy_register()
162 struct power_supply_desc *desc = &info->desc; in usb_conn_psy_register()
164 .of_node = dev->of_node, in usb_conn_psy_register()
167 info->conn_id = ida_alloc(&usb_conn_ida, GFP_KERNEL); in usb_conn_psy_register()
168 if (info->conn_id < 0) in usb_conn_psy_register()
169 return info->conn_id; in usb_conn_psy_register()
171 desc->name = devm_kasprintf(dev, GFP_KERNEL, "usb-charger-%d", in usb_conn_psy_register()
172 info->conn_id); in usb_conn_psy_register()
173 if (!desc->name) { in usb_conn_psy_register()
174 ida_free(&usb_conn_ida, info->conn_id); in usb_conn_psy_register()
175 return -ENOMEM; in usb_conn_psy_register()
178 desc->properties = usb_charger_properties; in usb_conn_psy_register()
179 desc->num_properties = ARRAY_SIZE(usb_charger_properties); in usb_conn_psy_register()
180 desc->get_property = usb_charger_get_property; in usb_conn_psy_register()
181 desc->type = POWER_SUPPLY_TYPE_USB; in usb_conn_psy_register()
184 info->charger = devm_power_supply_register(dev, desc, &cfg); in usb_conn_psy_register()
185 if (IS_ERR(info->charger)) { in usb_conn_psy_register()
186 dev_err(dev, "Unable to register charger %d\n", info->conn_id); in usb_conn_psy_register()
187 ida_free(&usb_conn_ida, info->conn_id); in usb_conn_psy_register()
190 return PTR_ERR_OR_ZERO(info->charger); in usb_conn_psy_register()
195 struct device *dev = &pdev->dev; in usb_conn_probe()
201 return -ENOMEM; in usb_conn_probe()
203 info->dev = dev; in usb_conn_probe()
204 info->id_gpiod = devm_gpiod_get_optional(dev, "id", GPIOD_IN); in usb_conn_probe()
205 if (IS_ERR(info->id_gpiod)) in usb_conn_probe()
206 return PTR_ERR(info->id_gpiod); in usb_conn_probe()
208 info->vbus_gpiod = devm_gpiod_get_optional(dev, "vbus", GPIOD_IN); in usb_conn_probe()
209 if (IS_ERR(info->vbus_gpiod)) in usb_conn_probe()
210 return PTR_ERR(info->vbus_gpiod); in usb_conn_probe()
212 if (!info->id_gpiod && !info->vbus_gpiod) { in usb_conn_probe()
214 return -ENODEV; in usb_conn_probe()
217 if (info->id_gpiod) in usb_conn_probe()
218 ret = gpiod_set_debounce(info->id_gpiod, USB_GPIO_DEB_US); in usb_conn_probe()
219 if (!ret && info->vbus_gpiod) in usb_conn_probe()
220 ret = gpiod_set_debounce(info->vbus_gpiod, USB_GPIO_DEB_US); in usb_conn_probe()
222 info->debounce_jiffies = msecs_to_jiffies(USB_GPIO_DEB_MS); in usb_conn_probe()
224 INIT_DELAYED_WORK(&info->dw_det, usb_conn_detect_cable); in usb_conn_probe()
226 info->vbus = devm_regulator_get_optional(dev, "vbus"); in usb_conn_probe()
227 if (PTR_ERR(info->vbus) == -ENODEV) in usb_conn_probe()
228 info->vbus = NULL; in usb_conn_probe()
230 if (IS_ERR(info->vbus)) in usb_conn_probe()
231 return dev_err_probe(dev, PTR_ERR(info->vbus), "failed to get vbus\n"); in usb_conn_probe()
233 info->role_sw = usb_role_switch_get(dev); in usb_conn_probe()
234 if (IS_ERR(info->role_sw)) in usb_conn_probe()
235 return dev_err_probe(dev, PTR_ERR(info->role_sw), in usb_conn_probe()
242 if (info->id_gpiod) { in usb_conn_probe()
243 info->id_irq = gpiod_to_irq(info->id_gpiod); in usb_conn_probe()
244 if (info->id_irq < 0) { in usb_conn_probe()
246 ret = info->id_irq; in usb_conn_probe()
250 ret = devm_request_threaded_irq(dev, info->id_irq, NULL, in usb_conn_probe()
252 pdev->name, info); in usb_conn_probe()
259 if (info->vbus_gpiod) { in usb_conn_probe()
260 info->vbus_irq = gpiod_to_irq(info->vbus_gpiod); in usb_conn_probe()
261 if (info->vbus_irq < 0) { in usb_conn_probe()
262 dev_err(dev, "failed to get VBUS IRQ\n"); in usb_conn_probe()
263 ret = info->vbus_irq; in usb_conn_probe()
267 ret = devm_request_threaded_irq(dev, info->vbus_irq, NULL, in usb_conn_probe()
269 pdev->name, info); in usb_conn_probe()
271 dev_err(dev, "failed to request VBUS IRQ\n"); in usb_conn_probe()
277 device_set_wakeup_capable(&pdev->dev, true); in usb_conn_probe()
280 info->initial_detection = true; in usb_conn_probe()
286 usb_role_switch_put(info->role_sw); in usb_conn_probe()
294 cancel_delayed_work_sync(&info->dw_det); in usb_conn_remove()
296 if (info->charger) in usb_conn_remove()
297 ida_free(&usb_conn_ida, info->conn_id); in usb_conn_remove()
299 if (info->last_role == USB_ROLE_HOST && info->vbus) in usb_conn_remove()
300 regulator_disable(info->vbus); in usb_conn_remove()
302 usb_role_switch_put(info->role_sw); in usb_conn_remove()
310 if (info->id_gpiod) in usb_conn_suspend()
311 enable_irq_wake(info->id_irq); in usb_conn_suspend()
312 if (info->vbus_gpiod) in usb_conn_suspend()
313 enable_irq_wake(info->vbus_irq); in usb_conn_suspend()
317 if (info->id_gpiod) in usb_conn_suspend()
318 disable_irq(info->id_irq); in usb_conn_suspend()
319 if (info->vbus_gpiod) in usb_conn_suspend()
320 disable_irq(info->vbus_irq); in usb_conn_suspend()
332 if (info->id_gpiod) in usb_conn_resume()
333 disable_irq_wake(info->id_irq); in usb_conn_resume()
334 if (info->vbus_gpiod) in usb_conn_resume()
335 disable_irq_wake(info->vbus_irq); in usb_conn_resume()
341 if (info->id_gpiod) in usb_conn_resume()
342 enable_irq(info->id_irq); in usb_conn_resume()
343 if (info->vbus_gpiod) in usb_conn_resume()
344 enable_irq(info->vbus_irq); in usb_conn_resume()
355 { .compatible = "gpio-usb-b-connector", },
364 .name = "usb-conn-gpio",
373 MODULE_DESCRIPTION("USB GPIO based connection detection driver");