2 * External Connector (extcon) framework
4 * Copyright (C) 2015 Samsung Electronics
7 * Copyright (C) 2012 Samsung Electronics
11 * based on switch class driver
12 * Copyright (C) 2008 Google, Inc.
15 * This software is licensed under the terms of the GNU General Public
16 * License version 2, as published by the Free Software Foundation, and
17 * may be copied, distributed, and modified under those terms.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
25 #ifndef __LINUX_EXTCON_H__
26 #define __LINUX_EXTCON_H__
28 #include <linux/device.h>
31 * Define the type of supported external connectors
33 #define EXTCON_TYPE_USB BIT(0) /* USB connector */
34 #define EXTCON_TYPE_CHG BIT(1) /* Charger connector */
35 #define EXTCON_TYPE_JACK BIT(2) /* Jack connector */
36 #define EXTCON_TYPE_DISP BIT(3) /* Display connector */
37 #define EXTCON_TYPE_MISC BIT(4) /* Miscellaneous connector */
40 * Define the unique id of supported external connectors
44 /* USB external connector */
46 #define EXTCON_USB_HOST 2
49 * Charging external connector
51 * When one SDP charger connector was reported, we should also report
52 * the USB connector, which means EXTCON_CHG_USB_SDP should always
53 * appear together with EXTCON_USB. The same as ACA charger connector,
54 * EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
56 * The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of
57 * current at 5V. The EXTCON_CHG_USB_FAST connector can provide at
58 * least 1A of current at 5V.
60 #define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
61 #define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
62 #define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
63 #define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
64 #define EXTCON_CHG_USB_FAST 9
65 #define EXTCON_CHG_USB_SLOW 10
66 #define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
67 #define EXTCON_CHG_USB_PD 12 /* USB Power Delivery */
69 /* Jack external connector */
70 #define EXTCON_JACK_MICROPHONE 20
71 #define EXTCON_JACK_HEADPHONE 21
72 #define EXTCON_JACK_LINE_IN 22
73 #define EXTCON_JACK_LINE_OUT 23
74 #define EXTCON_JACK_VIDEO_IN 24
75 #define EXTCON_JACK_VIDEO_OUT 25
76 #define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
77 #define EXTCON_JACK_SPDIF_OUT 27
79 /* Display external connector */
80 #define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
81 #define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
82 #define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
83 #define EXTCON_DISP_VGA 43 /* Video Graphics Array */
84 #define EXTCON_DISP_DP 44 /* Display Port */
85 #define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
87 /* Miscellaneous external connector */
88 #define EXTCON_DOCK 60
90 #define EXTCON_MECHANICAL 62
95 * Define the properties of supported external connectors.
97 * When adding the new extcon property, they *must* have
98 * the type/value/default information. Also, you *have to*
99 * modify the EXTCON_PROP_[type]_START/END definitions
100 * which mean the range of the supported properties
101 * for each extcon type.
103 * The naming style of property
104 * : EXTCON_PROP_[type]_[property name]
106 * EXTCON_PROP_USB_[property name] : USB property
107 * EXTCON_PROP_CHG_[property name] : Charger property
108 * EXTCON_PROP_JACK_[property name] : Jack property
109 * EXTCON_PROP_DISP_[property name] : Display property
113 * Properties of EXTCON_TYPE_USB.
115 * - EXTCON_PROP_USB_VBUS
116 * @type: integer (intval)
117 * @value: 0 (low) or 1 (high)
119 * - EXTCON_PROP_USB_TYPEC_POLARITY
120 * @type: integer (intval)
121 * @value: 0 (normal) or 1 (flip)
122 * @default: 0 (normal)
123 * - EXTCON_PROP_USB_SS (SuperSpeed)
124 * @type: integer (intval)
125 * @value: 0 (USB/USB2) or 1 (USB3)
126 * @default: 0 (USB/USB2)
129 #define EXTCON_PROP_USB_VBUS 0
130 #define EXTCON_PROP_USB_TYPEC_POLARITY 1
131 #define EXTCON_PROP_USB_SS 2
133 #define EXTCON_PROP_USB_MIN 0
134 #define EXTCON_PROP_USB_MAX 2
135 #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
137 /* Properties of EXTCON_TYPE_CHG. */
138 #define EXTCON_PROP_CHG_MIN 50
139 #define EXTCON_PROP_CHG_MAX 50
140 #define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
142 /* Properties of EXTCON_TYPE_JACK. */
143 #define EXTCON_PROP_JACK_MIN 100
144 #define EXTCON_PROP_JACK_MAX 100
145 #define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
148 * Properties of EXTCON_TYPE_DISP.
150 * - EXTCON_PROP_DISP_HPD (Hot Plug Detect)
151 * @type: integer (intval)
152 * @value: 0 (no hpd) or 1 (hpd)
153 * @default: 0 (no hpd)
156 #define EXTCON_PROP_DISP_HPD 150
158 /* Properties of EXTCON_TYPE_DISP. */
159 #define EXTCON_PROP_DISP_MIN 150
160 #define EXTCON_PROP_DISP_MAX 151
161 #define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
164 * Define the type of property's value.
166 * Define the property's value as union type. Because each property
167 * would need the different data type to store it.
169 union extcon_property_value {
170 int intval; /* type : integer (intval) */
176 #if IS_ENABLED(CONFIG_EXTCON)
178 /* Following APIs register/unregister the extcon device. */
179 extern int extcon_dev_register(struct extcon_dev *edev);
180 extern void extcon_dev_unregister(struct extcon_dev *edev);
181 extern int devm_extcon_dev_register(struct device *dev,
182 struct extcon_dev *edev);
183 extern void devm_extcon_dev_unregister(struct device *dev,
184 struct extcon_dev *edev);
186 /* Following APIs allocate/free the memory of the extcon device. */
187 extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
188 extern void extcon_dev_free(struct extcon_dev *edev);
189 extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
190 const unsigned int *cable);
191 extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
193 /* Synchronize the state and property value for each external connector. */
194 extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
197 * Following APIs get/set the connected state of each external connector.
198 * The 'id' argument indicates the defined external connector.
200 extern int extcon_get_state(struct extcon_dev *edev, unsigned int id);
201 extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
203 extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
207 * Following APIs get/set the property of each external connector.
208 * The 'id' argument indicates the defined external connector
209 * and the 'prop' indicates the extcon property.
211 * And extcon_get/set_property_capability() set the capability of the property
212 * for each external connector. They are used to set the capability of the
213 * property of each external connector based on the id and property.
215 extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
217 union extcon_property_value *prop_val);
218 extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
220 union extcon_property_value prop_val);
221 extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
223 union extcon_property_value prop_val);
224 extern int extcon_get_property_capability(struct extcon_dev *edev,
225 unsigned int id, unsigned int prop);
226 extern int extcon_set_property_capability(struct extcon_dev *edev,
227 unsigned int id, unsigned int prop);
230 * Following APIs register the notifier block in order to detect
231 * the change of both state and property value for each external connector.
233 * extcon_register_notifier(*edev, id, *nb) : Register a notifier block
234 * for specific external connector of the extcon.
235 * extcon_register_notifier_all(*edev, *nb) : Register a notifier block
236 * for all supported external connectors of the extcon.
238 extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
239 struct notifier_block *nb);
240 extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
241 struct notifier_block *nb);
242 extern int devm_extcon_register_notifier(struct device *dev,
243 struct extcon_dev *edev, unsigned int id,
244 struct notifier_block *nb);
245 extern void devm_extcon_unregister_notifier(struct device *dev,
246 struct extcon_dev *edev, unsigned int id,
247 struct notifier_block *nb);
249 extern int extcon_register_notifier_all(struct extcon_dev *edev,
250 struct notifier_block *nb);
251 extern int extcon_unregister_notifier_all(struct extcon_dev *edev,
252 struct notifier_block *nb);
253 extern int devm_extcon_register_notifier_all(struct device *dev,
254 struct extcon_dev *edev,
255 struct notifier_block *nb);
256 extern void devm_extcon_unregister_notifier_all(struct device *dev,
257 struct extcon_dev *edev,
258 struct notifier_block *nb);
261 * Following APIs get the extcon_dev from devicetree or by through extcon name.
263 extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
264 extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
267 /* Following API get the name of extcon device. */
268 extern const char *extcon_get_edev_name(struct extcon_dev *edev);
270 #else /* CONFIG_EXTCON */
271 static inline int extcon_dev_register(struct extcon_dev *edev)
276 static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
278 static inline int devm_extcon_dev_register(struct device *dev,
279 struct extcon_dev *edev)
284 static inline void devm_extcon_dev_unregister(struct device *dev,
285 struct extcon_dev *edev) { }
287 static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
289 return ERR_PTR(-ENOSYS);
292 static inline void extcon_dev_free(struct extcon_dev *edev) { }
294 static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
295 const unsigned int *cable)
297 return ERR_PTR(-ENOSYS);
300 static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
303 static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
308 static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
314 static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
320 static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
325 static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
327 union extcon_property_value *prop_val)
331 static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
333 union extcon_property_value prop_val)
338 static inline int extcon_set_property_sync(struct extcon_dev *edev,
339 unsigned int id, unsigned int prop,
340 union extcon_property_value prop_val)
345 static inline int extcon_get_property_capability(struct extcon_dev *edev,
346 unsigned int id, unsigned int prop)
351 static inline int extcon_set_property_capability(struct extcon_dev *edev,
352 unsigned int id, unsigned int prop)
357 static inline int extcon_register_notifier(struct extcon_dev *edev,
358 unsigned int id, struct notifier_block *nb)
363 static inline int extcon_unregister_notifier(struct extcon_dev *edev,
364 unsigned int id, struct notifier_block *nb)
369 static inline int devm_extcon_register_notifier(struct device *dev,
370 struct extcon_dev *edev, unsigned int id,
371 struct notifier_block *nb)
376 static inline void devm_extcon_unregister_notifier(struct device *dev,
377 struct extcon_dev *edev, unsigned int id,
378 struct notifier_block *nb) { }
380 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
382 return ERR_PTR(-ENODEV);
385 static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
388 return ERR_PTR(-ENODEV);
390 #endif /* CONFIG_EXTCON */
393 * Following structure and API are deprecated. EXTCON remains the function
394 * definition to prevent the build break.
396 struct extcon_specific_cable_nb {
397 struct notifier_block *user_nb;
399 struct extcon_dev *edev;
400 unsigned long previous_value;
403 static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
404 const char *extcon_name, const char *cable_name,
405 struct notifier_block *nb)
410 static inline int extcon_unregister_interest(struct extcon_specific_cable_nb *obj)
414 #endif /* __LINUX_EXTCON_H__ */