2 * External connector (extcon) class driver
4 * Copyright (C) 2015 Samsung Electronics
5 * Author: Chanwoo Choi <cw00.choi@samsung.com>
7 * Copyright (C) 2012 Samsung Electronics
8 * Author: Donggeun Kim <dg77.kim@samsung.com>
9 * Author: MyungJoo Ham <myungjoo.ham@samsung.com>
11 * based on switch class driver
12 * Copyright (C) 2008 Google, Inc.
13 * Author: Mike Lockwood <lockwood@android.com>
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.
26 #ifndef __LINUX_EXTCON_H__
27 #define __LINUX_EXTCON_H__
29 #include <linux/device.h>
32 * Define the type of supported external connectors
34 #define EXTCON_TYPE_USB BIT(0) /* USB connector */
35 #define EXTCON_TYPE_CHG BIT(1) /* Charger connector */
36 #define EXTCON_TYPE_JACK BIT(2) /* Jack connector */
37 #define EXTCON_TYPE_DISP BIT(3) /* Display connector */
38 #define EXTCON_TYPE_MISC BIT(4) /* Miscellaneous connector */
41 * Define the unique id of supported external connectors
45 /* USB external connector */
47 #define EXTCON_USB_HOST 2
50 * Charging external connector
52 * When one SDP charger connector was reported, we should also report
53 * the USB connector, which means EXTCON_CHG_USB_SDP should always
54 * appear together with EXTCON_USB. The same as ACA charger connector,
55 * EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
57 #define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
58 #define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
59 #define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
60 #define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
61 #define EXTCON_CHG_USB_FAST 9
62 #define EXTCON_CHG_USB_SLOW 10
63 #define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
65 /* Jack external connector */
66 #define EXTCON_JACK_MICROPHONE 20
67 #define EXTCON_JACK_HEADPHONE 21
68 #define EXTCON_JACK_LINE_IN 22
69 #define EXTCON_JACK_LINE_OUT 23
70 #define EXTCON_JACK_VIDEO_IN 24
71 #define EXTCON_JACK_VIDEO_OUT 25
72 #define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
73 #define EXTCON_JACK_SPDIF_OUT 27
75 /* Display external connector */
76 #define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
77 #define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
78 #define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
79 #define EXTCON_DISP_VGA 43 /* Video Graphics Array */
80 #define EXTCON_DISP_DP 44 /* Display Port */
81 #define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
83 /* Miscellaneous external connector */
84 #define EXTCON_DOCK 60
86 #define EXTCON_MECHANICAL 62
91 * Define the property of supported external connectors.
93 * When adding the new extcon property, they *must* have
94 * the type/value/default information. Also, you *have to*
95 * modify the EXTCON_PROP_[type]_START/END definitions
96 * which mean the range of the supported properties
97 * for each extcon type.
99 * The naming style of property
100 * : EXTCON_PROP_[type]_[property name]
102 * EXTCON_PROP_USB_[property name] : USB property
103 * EXTCON_PROP_CHG_[property name] : Charger property
104 * EXTCON_PROP_JACK_[property name] : Jack property
105 * EXTCON_PROP_DISP_[property name] : Display property
109 * Properties of EXTCON_TYPE_USB.
111 * - EXTCON_PROP_USB_VBUS
112 * @type: integer (intval)
113 * @value: 0 (low) or 1 (high)
115 * - EXTCON_PROP_USB_TYPEC_POLARITY
116 * @type: integer (intval)
117 * @value: 0 (normal) or 1 (flip)
118 * @default: 0 (normal)
119 * - EXTCON_PROP_USB_SS (SuperSpeed)
120 * @type: integer (intval)
121 * @value: 0 (USB/USB2) or 1 (USB3)
122 * @default: 0 (USB/USB2)
125 #define EXTCON_PROP_USB_VBUS 0
126 #define EXTCON_PROP_USB_TYPEC_POLARITY 1
127 #define EXTCON_PROP_USB_SS 2
129 #define EXTCON_PROP_USB_MIN 0
130 #define EXTCON_PROP_USB_MAX 2
131 #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
133 /* Properties of EXTCON_TYPE_CHG. */
134 #define EXTCON_PROP_CHG_MIN 50
135 #define EXTCON_PROP_CHG_MAX 50
136 #define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
138 /* Properties of EXTCON_TYPE_JACK. */
139 #define EXTCON_PROP_JACK_MIN 100
140 #define EXTCON_PROP_JACK_MAX 100
141 #define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
144 * Properties of EXTCON_TYPE_DISP.
146 * - EXTCON_PROP_DISP_HPD (Hot Plug Detect)
147 * @type: integer (intval)
148 * @value: 0 (no hpd) or 1 (hpd)
149 * @default: 0 (no hpd)
152 #define EXTCON_PROP_DISP_HPD 150
154 /* Properties of EXTCON_TYPE_DISP. */
155 #define EXTCON_PROP_DISP_MIN 150
156 #define EXTCON_PROP_DISP_MAX 151
157 #define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
160 * Define the type of property's value.
162 * Define the property's value as union type. Because each property
163 * would need the different data type to store it.
165 union extcon_property_value {
166 int intval; /* type : integer (intval) */
172 #if IS_ENABLED(CONFIG_EXTCON)
175 * Following APIs are for notifiers or configurations.
176 * Notifiers are the external port and connection devices.
178 extern int extcon_dev_register(struct extcon_dev *edev);
179 extern void extcon_dev_unregister(struct extcon_dev *edev);
180 extern int devm_extcon_dev_register(struct device *dev,
181 struct extcon_dev *edev);
182 extern void devm_extcon_dev_unregister(struct device *dev,
183 struct extcon_dev *edev);
184 extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
187 * Following APIs control the memory of extcon device.
189 extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
190 extern void extcon_dev_free(struct extcon_dev *edev);
191 extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
192 const unsigned int *cable);
193 extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
196 * get/set_state access each bit of the 32b encoded state value.
197 * They are used to access the status of each cable based on the cable id.
199 extern int extcon_get_state(struct extcon_dev *edev, unsigned int id);
200 extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
202 extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
205 * Synchronize the state and property data for a specific external connector.
207 extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
210 * get/set_property access the property value of each external connector.
211 * They are used to access the property of each cable based on the property id.
213 extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
215 union extcon_property_value *prop_val);
216 extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
218 union extcon_property_value prop_val);
219 extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
221 union extcon_property_value prop_val);
224 * get/set_property_capability set the capability of the property for each
225 * external connector. They are used to set the capability of the property
226 * of each external connector based on the id and property.
228 extern int extcon_get_property_capability(struct extcon_dev *edev,
229 unsigned int id, unsigned int prop);
230 extern int extcon_set_property_capability(struct extcon_dev *edev,
231 unsigned int id, unsigned int prop);
234 * Following APIs are to monitor every action of a notifier.
235 * Registrar gets notified for every external port of a connection device.
236 * Probably this could be used to debug an action of notifier; however,
237 * we do not recommend to use this for normal 'notifiee' device drivers who
238 * want to be notified by a specific external port of the notifier.
240 extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
241 struct notifier_block *nb);
242 extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
243 struct notifier_block *nb);
244 extern int devm_extcon_register_notifier(struct device *dev,
245 struct extcon_dev *edev, unsigned int id,
246 struct notifier_block *nb);
247 extern void devm_extcon_unregister_notifier(struct device *dev,
248 struct extcon_dev *edev, unsigned int id,
249 struct notifier_block *nb);
252 * Following API get the extcon device from devicetree.
253 * This function use phandle of devicetree to get extcon device directly.
255 extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
258 /* Following API to get information of extcon device */
259 extern const char *extcon_get_edev_name(struct extcon_dev *edev);
262 #else /* CONFIG_EXTCON */
263 static inline int extcon_dev_register(struct extcon_dev *edev)
268 static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
270 static inline int devm_extcon_dev_register(struct device *dev,
271 struct extcon_dev *edev)
276 static inline void devm_extcon_dev_unregister(struct device *dev,
277 struct extcon_dev *edev) { }
279 static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
281 return ERR_PTR(-ENOSYS);
284 static inline void extcon_dev_free(struct extcon_dev *edev) { }
286 static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
287 const unsigned int *cable)
289 return ERR_PTR(-ENOSYS);
292 static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
295 static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
300 static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
306 static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
312 static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
317 static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
319 union extcon_property_value *prop_val)
323 static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
325 union extcon_property_value prop_val)
330 static inline int extcon_set_property_sync(struct extcon_dev *edev,
331 unsigned int id, unsigned int prop,
332 union extcon_property_value prop_val)
337 static inline int extcon_get_property_capability(struct extcon_dev *edev,
338 unsigned int id, unsigned int prop)
343 static inline int extcon_set_property_capability(struct extcon_dev *edev,
344 unsigned int id, unsigned int prop)
349 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
354 static inline int extcon_register_notifier(struct extcon_dev *edev,
356 struct notifier_block *nb)
361 static inline int extcon_unregister_notifier(struct extcon_dev *edev,
363 struct notifier_block *nb)
368 static inline int devm_extcon_register_notifier(struct device *dev,
369 struct extcon_dev *edev, unsigned int id,
370 struct notifier_block *nb)
375 static inline void devm_extcon_unregister_notifier(struct device *dev,
376 struct extcon_dev *edev, unsigned int id,
377 struct notifier_block *nb) { }
379 static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
382 return ERR_PTR(-ENODEV);
384 #endif /* CONFIG_EXTCON */
387 * Following structure and API are deprecated. EXTCON remains the function
388 * definition to prevent the build break.
390 struct extcon_specific_cable_nb {
391 struct notifier_block *user_nb;
393 struct extcon_dev *edev;
394 unsigned long previous_value;
397 static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
398 const char *extcon_name, const char *cable_name,
399 struct notifier_block *nb)
404 static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
410 static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id)
412 return extcon_get_state(edev, id);
415 static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
418 return extcon_set_state_sync(edev, id, cable_state);
420 #endif /* __LINUX_EXTCON_H__ */