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 * The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of
58 * current at 5V. The EXTCON_CHG_USB_FAST connector can provide at
59 * least 1A of current at 5V.
61 #define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
62 #define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
63 #define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
64 #define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
65 #define EXTCON_CHG_USB_FAST 9
66 #define EXTCON_CHG_USB_SLOW 10
67 #define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
68 #define EXTCON_CHG_USB_PD 12 /* USB Power Delivery */
70 /* Jack external connector */
71 #define EXTCON_JACK_MICROPHONE 20
72 #define EXTCON_JACK_HEADPHONE 21
73 #define EXTCON_JACK_LINE_IN 22
74 #define EXTCON_JACK_LINE_OUT 23
75 #define EXTCON_JACK_VIDEO_IN 24
76 #define EXTCON_JACK_VIDEO_OUT 25
77 #define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
78 #define EXTCON_JACK_SPDIF_OUT 27
80 /* Display external connector */
81 #define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
82 #define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
83 #define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
84 #define EXTCON_DISP_VGA 43 /* Video Graphics Array */
85 #define EXTCON_DISP_DP 44 /* Display Port */
86 #define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
88 /* Miscellaneous external connector */
89 #define EXTCON_DOCK 60
91 #define EXTCON_MECHANICAL 62
96 * Define the property of supported external connectors.
98 * When adding the new extcon property, they *must* have
99 * the type/value/default information. Also, you *have to*
100 * modify the EXTCON_PROP_[type]_START/END definitions
101 * which mean the range of the supported properties
102 * for each extcon type.
104 * The naming style of property
105 * : EXTCON_PROP_[type]_[property name]
107 * EXTCON_PROP_USB_[property name] : USB property
108 * EXTCON_PROP_CHG_[property name] : Charger property
109 * EXTCON_PROP_JACK_[property name] : Jack property
110 * EXTCON_PROP_DISP_[property name] : Display property
114 * Properties of EXTCON_TYPE_USB.
116 * - EXTCON_PROP_USB_VBUS
117 * @type: integer (intval)
118 * @value: 0 (low) or 1 (high)
120 * - EXTCON_PROP_USB_TYPEC_POLARITY
121 * @type: integer (intval)
122 * @value: 0 (normal) or 1 (flip)
123 * @default: 0 (normal)
124 * - EXTCON_PROP_USB_SS (SuperSpeed)
125 * @type: integer (intval)
126 * @value: 0 (USB/USB2) or 1 (USB3)
127 * @default: 0 (USB/USB2)
130 #define EXTCON_PROP_USB_VBUS 0
131 #define EXTCON_PROP_USB_TYPEC_POLARITY 1
132 #define EXTCON_PROP_USB_SS 2
134 #define EXTCON_PROP_USB_MIN 0
135 #define EXTCON_PROP_USB_MAX 2
136 #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
138 /* Properties of EXTCON_TYPE_CHG. */
139 #define EXTCON_PROP_CHG_MIN 50
140 #define EXTCON_PROP_CHG_MAX 50
141 #define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
143 /* Properties of EXTCON_TYPE_JACK. */
144 #define EXTCON_PROP_JACK_MIN 100
145 #define EXTCON_PROP_JACK_MAX 100
146 #define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
149 * Properties of EXTCON_TYPE_DISP.
151 * - EXTCON_PROP_DISP_HPD (Hot Plug Detect)
152 * @type: integer (intval)
153 * @value: 0 (no hpd) or 1 (hpd)
154 * @default: 0 (no hpd)
157 #define EXTCON_PROP_DISP_HPD 150
159 /* Properties of EXTCON_TYPE_DISP. */
160 #define EXTCON_PROP_DISP_MIN 150
161 #define EXTCON_PROP_DISP_MAX 151
162 #define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
165 * Define the type of property's value.
167 * Define the property's value as union type. Because each property
168 * would need the different data type to store it.
170 union extcon_property_value {
171 int intval; /* type : integer (intval) */
177 #if IS_ENABLED(CONFIG_EXTCON)
180 * Following APIs are for notifiers or configurations.
181 * Notifiers are the external port and connection devices.
183 extern int extcon_dev_register(struct extcon_dev *edev);
184 extern void extcon_dev_unregister(struct extcon_dev *edev);
185 extern int devm_extcon_dev_register(struct device *dev,
186 struct extcon_dev *edev);
187 extern void devm_extcon_dev_unregister(struct device *dev,
188 struct extcon_dev *edev);
189 extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
192 * Following APIs control the memory of extcon device.
194 extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
195 extern void extcon_dev_free(struct extcon_dev *edev);
196 extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
197 const unsigned int *cable);
198 extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
201 * get/set_state access each bit of the 32b encoded state value.
202 * They are used to access the status of each cable based on the cable id.
204 extern int extcon_get_state(struct extcon_dev *edev, unsigned int id);
205 extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
207 extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
210 * Synchronize the state and property data for a specific external connector.
212 extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
215 * get/set_property access the property value of each external connector.
216 * They are used to access the property of each cable based on the property id.
218 extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
220 union extcon_property_value *prop_val);
221 extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
223 union extcon_property_value prop_val);
224 extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
226 union extcon_property_value prop_val);
229 * get/set_property_capability set the capability of the property for each
230 * external connector. They are used to set the capability of the property
231 * of each external connector based on the id and property.
233 extern int extcon_get_property_capability(struct extcon_dev *edev,
234 unsigned int id, unsigned int prop);
235 extern int extcon_set_property_capability(struct extcon_dev *edev,
236 unsigned int id, unsigned int prop);
239 * Following APIs are to monitor every action of a notifier.
240 * Registrar gets notified for every external port of a connection device.
241 * Probably this could be used to debug an action of notifier; however,
242 * we do not recommend to use this for normal 'notifiee' device drivers who
243 * want to be notified by a specific external port of the notifier.
245 extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
246 struct notifier_block *nb);
247 extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
248 struct notifier_block *nb);
249 extern int devm_extcon_register_notifier(struct device *dev,
250 struct extcon_dev *edev, unsigned int id,
251 struct notifier_block *nb);
252 extern void devm_extcon_unregister_notifier(struct device *dev,
253 struct extcon_dev *edev, unsigned int id,
254 struct notifier_block *nb);
257 * Following API get the extcon device from devicetree.
258 * This function use phandle of devicetree to get extcon device directly.
260 extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
263 /* Following API to get information of extcon device */
264 extern const char *extcon_get_edev_name(struct extcon_dev *edev);
267 #else /* CONFIG_EXTCON */
268 static inline int extcon_dev_register(struct extcon_dev *edev)
273 static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
275 static inline int devm_extcon_dev_register(struct device *dev,
276 struct extcon_dev *edev)
281 static inline void devm_extcon_dev_unregister(struct device *dev,
282 struct extcon_dev *edev) { }
284 static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
286 return ERR_PTR(-ENOSYS);
289 static inline void extcon_dev_free(struct extcon_dev *edev) { }
291 static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
292 const unsigned int *cable)
294 return ERR_PTR(-ENOSYS);
297 static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
300 static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
305 static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
311 static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
317 static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
322 static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
324 union extcon_property_value *prop_val)
328 static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
330 union extcon_property_value prop_val)
335 static inline int extcon_set_property_sync(struct extcon_dev *edev,
336 unsigned int id, unsigned int prop,
337 union extcon_property_value prop_val)
342 static inline int extcon_get_property_capability(struct extcon_dev *edev,
343 unsigned int id, unsigned int prop)
348 static inline int extcon_set_property_capability(struct extcon_dev *edev,
349 unsigned int id, unsigned int prop)
354 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
359 static inline int extcon_register_notifier(struct extcon_dev *edev,
361 struct notifier_block *nb)
366 static inline int extcon_unregister_notifier(struct extcon_dev *edev,
368 struct notifier_block *nb)
373 static inline int devm_extcon_register_notifier(struct device *dev,
374 struct extcon_dev *edev, unsigned int id,
375 struct notifier_block *nb)
380 static inline void devm_extcon_unregister_notifier(struct device *dev,
381 struct extcon_dev *edev, unsigned int id,
382 struct notifier_block *nb) { }
384 static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
387 return ERR_PTR(-ENODEV);
389 #endif /* CONFIG_EXTCON */
392 * Following structure and API are deprecated. EXTCON remains the function
393 * definition to prevent the build break.
395 struct extcon_specific_cable_nb {
396 struct notifier_block *user_nb;
398 struct extcon_dev *edev;
399 unsigned long previous_value;
402 static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
403 const char *extcon_name, const char *cable_name,
404 struct notifier_block *nb)
409 static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
415 static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id)
417 return extcon_get_state(edev, id);
420 static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
423 return extcon_set_state_sync(edev, id, cable_state);
425 #endif /* __LINUX_EXTCON_H__ */