1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * External Connector (extcon) framework
4 * - linux/include/linux/extcon.h for extcon consumer device driver.
6 * Copyright (C) 2015 Samsung Electronics
7 * Author: Chanwoo Choi <cw00.choi@samsung.com>
9 * Copyright (C) 2012 Samsung Electronics
10 * Author: Donggeun Kim <dg77.kim@samsung.com>
11 * Author: MyungJoo Ham <myungjoo.ham@samsung.com>
13 * based on switch class driver
14 * Copyright (C) 2008 Google, Inc.
15 * Author: Mike Lockwood <lockwood@android.com>
18 #ifndef __LINUX_EXTCON_H__
19 #define __LINUX_EXTCON_H__
21 #include <linux/device.h>
24 * Define the type of supported external connectors
26 #define EXTCON_TYPE_USB BIT(0) /* USB connector */
27 #define EXTCON_TYPE_CHG BIT(1) /* Charger connector */
28 #define EXTCON_TYPE_JACK BIT(2) /* Jack connector */
29 #define EXTCON_TYPE_DISP BIT(3) /* Display connector */
30 #define EXTCON_TYPE_MISC BIT(4) /* Miscellaneous connector */
33 * Define the unique id of supported external connectors
37 /* USB external connector */
39 #define EXTCON_USB_HOST 2
42 * Charging external connector
44 * When one SDP charger connector was reported, we should also report
45 * the USB connector, which means EXTCON_CHG_USB_SDP should always
46 * appear together with EXTCON_USB. The same as ACA charger connector,
47 * EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
49 * The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of
50 * current at 5V. The EXTCON_CHG_USB_FAST connector can provide at
51 * least 1A of current at 5V.
53 #define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
54 #define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
55 #define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
56 #define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
57 #define EXTCON_CHG_USB_FAST 9
58 #define EXTCON_CHG_USB_SLOW 10
59 #define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
60 #define EXTCON_CHG_USB_PD 12 /* USB Power Delivery */
62 /* Jack external connector */
63 #define EXTCON_JACK_MICROPHONE 20
64 #define EXTCON_JACK_HEADPHONE 21
65 #define EXTCON_JACK_LINE_IN 22
66 #define EXTCON_JACK_LINE_OUT 23
67 #define EXTCON_JACK_VIDEO_IN 24
68 #define EXTCON_JACK_VIDEO_OUT 25
69 #define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
70 #define EXTCON_JACK_SPDIF_OUT 27
72 /* Display external connector */
73 #define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
74 #define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
75 #define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
76 #define EXTCON_DISP_VGA 43 /* Video Graphics Array */
77 #define EXTCON_DISP_DP 44 /* Display Port */
78 #define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
80 /* Miscellaneous external connector */
81 #define EXTCON_DOCK 60
83 #define EXTCON_MECHANICAL 62
88 * Define the properties of supported external connectors.
90 * When adding the new extcon property, they *must* have
91 * the type/value/default information. Also, you *have to*
92 * modify the EXTCON_PROP_[type]_START/END definitions
93 * which mean the range of the supported properties
94 * for each extcon type.
96 * The naming style of property
97 * : EXTCON_PROP_[type]_[property name]
99 * EXTCON_PROP_USB_[property name] : USB property
100 * EXTCON_PROP_CHG_[property name] : Charger property
101 * EXTCON_PROP_JACK_[property name] : Jack property
102 * EXTCON_PROP_DISP_[property name] : Display property
106 * Properties of EXTCON_TYPE_USB.
108 * - EXTCON_PROP_USB_VBUS
109 * @type: integer (intval)
110 * @value: 0 (low) or 1 (high)
112 * - EXTCON_PROP_USB_TYPEC_POLARITY
113 * @type: integer (intval)
114 * @value: 0 (normal) or 1 (flip)
115 * @default: 0 (normal)
116 * - EXTCON_PROP_USB_SS (SuperSpeed)
117 * @type: integer (intval)
118 * @value: 0 (USB/USB2) or 1 (USB3)
119 * @default: 0 (USB/USB2)
122 #define EXTCON_PROP_USB_VBUS 0
123 #define EXTCON_PROP_USB_TYPEC_POLARITY 1
124 #define EXTCON_PROP_USB_SS 2
126 #define EXTCON_PROP_USB_MIN 0
127 #define EXTCON_PROP_USB_MAX 2
128 #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
130 /* Properties of EXTCON_TYPE_CHG. */
131 #define EXTCON_PROP_CHG_MIN 50
132 #define EXTCON_PROP_CHG_MAX 50
133 #define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
135 /* Properties of EXTCON_TYPE_JACK. */
136 #define EXTCON_PROP_JACK_MIN 100
137 #define EXTCON_PROP_JACK_MAX 100
138 #define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
141 * Properties of EXTCON_TYPE_DISP.
143 * - EXTCON_PROP_DISP_HPD (Hot Plug Detect)
144 * @type: integer (intval)
145 * @value: 0 (no hpd) or 1 (hpd)
146 * @default: 0 (no hpd)
149 #define EXTCON_PROP_DISP_HPD 150
151 /* Properties of EXTCON_TYPE_DISP. */
152 #define EXTCON_PROP_DISP_MIN 150
153 #define EXTCON_PROP_DISP_MAX 151
154 #define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
157 * Define the type of property's value.
159 * Define the property's value as union type. Because each property
160 * would need the different data type to store it.
162 union extcon_property_value {
163 int intval; /* type : integer (intval) */
168 #if IS_ENABLED(CONFIG_EXTCON)
170 * Following APIs get the connected state of each external connector.
171 * The 'id' argument indicates the defined external connector.
173 int extcon_get_state(struct extcon_dev *edev, unsigned int id);
176 * Following APIs get the property of each external connector.
177 * The 'id' argument indicates the defined external connector
178 * and the 'prop' indicates the extcon property.
180 * And extcon_get_property_capability() get the capability of the property
181 * for each external connector. They are used to get the capability of the
182 * property of each external connector based on the id and property.
184 int extcon_get_property(struct extcon_dev *edev, unsigned int id,
186 union extcon_property_value *prop_val);
187 int extcon_get_property_capability(struct extcon_dev *edev,
188 unsigned int id, unsigned int prop);
191 * Following APIs register the notifier block in order to detect
192 * the change of both state and property value for each external connector.
194 * extcon_register_notifier(*edev, id, *nb) : Register a notifier block
195 * for specific external connector of the extcon.
196 * extcon_register_notifier_all(*edev, *nb) : Register a notifier block
197 * for all supported external connectors of the extcon.
199 int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
200 struct notifier_block *nb);
201 int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
202 struct notifier_block *nb);
203 int devm_extcon_register_notifier(struct device *dev,
204 struct extcon_dev *edev, unsigned int id,
205 struct notifier_block *nb);
206 void devm_extcon_unregister_notifier(struct device *dev,
207 struct extcon_dev *edev, unsigned int id,
208 struct notifier_block *nb);
210 int extcon_register_notifier_all(struct extcon_dev *edev,
211 struct notifier_block *nb);
212 int extcon_unregister_notifier_all(struct extcon_dev *edev,
213 struct notifier_block *nb);
214 int devm_extcon_register_notifier_all(struct device *dev,
215 struct extcon_dev *edev,
216 struct notifier_block *nb);
217 void devm_extcon_unregister_notifier_all(struct device *dev,
218 struct extcon_dev *edev,
219 struct notifier_block *nb);
222 * Following APIs get the extcon_dev from devicetree or by through extcon name.
224 struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
225 struct extcon_dev *extcon_find_edev_by_node(struct device_node *node);
226 struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
229 /* Following API get the name of extcon device. */
230 const char *extcon_get_edev_name(struct extcon_dev *edev);
232 #else /* CONFIG_EXTCON */
233 static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
238 static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
240 union extcon_property_value *prop_val)
245 static inline int extcon_get_property_capability(struct extcon_dev *edev,
246 unsigned int id, unsigned int prop)
251 static inline int extcon_register_notifier(struct extcon_dev *edev,
252 unsigned int id, struct notifier_block *nb)
257 static inline int extcon_unregister_notifier(struct extcon_dev *edev,
258 unsigned int id, struct notifier_block *nb)
263 static inline int devm_extcon_register_notifier(struct device *dev,
264 struct extcon_dev *edev, unsigned int id,
265 struct notifier_block *nb)
270 static inline void devm_extcon_unregister_notifier(struct device *dev,
271 struct extcon_dev *edev, unsigned int id,
272 struct notifier_block *nb) { }
274 static inline int extcon_register_notifier_all(struct extcon_dev *edev,
275 struct notifier_block *nb)
280 static inline int extcon_unregister_notifier_all(struct extcon_dev *edev,
281 struct notifier_block *nb)
286 static inline int devm_extcon_register_notifier_all(struct device *dev,
287 struct extcon_dev *edev,
288 struct notifier_block *nb)
293 static inline void devm_extcon_unregister_notifier_all(struct device *dev,
294 struct extcon_dev *edev,
295 struct notifier_block *nb) { }
297 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
299 return ERR_PTR(-ENODEV);
302 static inline struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
304 return ERR_PTR(-ENODEV);
307 static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
310 return ERR_PTR(-ENODEV);
313 static inline const char *extcon_get_edev_name(struct extcon_dev *edev)
317 #endif /* CONFIG_EXTCON */
320 * Following structure and API are deprecated. EXTCON remains the function
321 * definition to prevent the build break.
323 struct extcon_specific_cable_nb {
324 struct notifier_block *user_nb;
326 struct extcon_dev *edev;
327 unsigned long previous_value;
330 static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
331 const char *extcon_name, const char *cable_name,
332 struct notifier_block *nb)
337 static inline int extcon_unregister_interest(struct extcon_specific_cable_nb *obj)
341 #endif /* __LINUX_EXTCON_H__ */