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
49 /* Charging external connector */
50 #define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
51 #define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
52 #define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
53 #define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
54 #define EXTCON_CHG_USB_FAST 9
55 #define EXTCON_CHG_USB_SLOW 10
57 /* Jack external connector */
58 #define EXTCON_JACK_MICROPHONE 20
59 #define EXTCON_JACK_HEADPHONE 21
60 #define EXTCON_JACK_LINE_IN 22
61 #define EXTCON_JACK_LINE_OUT 23
62 #define EXTCON_JACK_VIDEO_IN 24
63 #define EXTCON_JACK_VIDEO_OUT 25
64 #define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
65 #define EXTCON_JACK_SPDIF_OUT 27
67 /* Display external connector */
68 #define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
69 #define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
70 #define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
71 #define EXTCON_DISP_VGA 43 /* Video Graphics Array */
72 #define EXTCON_DISP_DP 44 /* Display Port */
74 /* Miscellaneous external connector */
75 #define EXTCON_DOCK 60
77 #define EXTCON_MECHANICAL 62
82 * Define the property of supported external connectors.
84 * When adding the new extcon property, they *must* have
85 * the type/value/default information. Also, you *have to*
86 * modify the EXTCON_PROP_[type]_START/END definitions
87 * which mean the range of the supported properties
88 * for each extcon type.
90 * The naming style of property
91 * : EXTCON_PROP_[type]_[property name]
93 * EXTCON_PROP_USB_[property name] : USB property
94 * EXTCON_PROP_CHG_[property name] : Charger property
95 * EXTCON_PROP_JACK_[property name] : Jack property
96 * EXTCON_PROP_DISP_[property name] : Display property
100 * Properties of EXTCON_TYPE_USB.
102 * - EXTCON_PROP_USB_ID
103 * @type: integer (intval)
104 * @value: 0 (low) or 1 (high)
106 * - EXTCON_PROP_USB_VBUS
107 * @type: integer (intval)
108 * @value: 0 (low) or 1 (high)
110 * - EXTCON_PROP_USB_TYPEC_POLARITY
111 * @type: integer (intval)
112 * @value: 0 (normal) or 1 (flip)
113 * @default: 0 (normal)
115 #define EXTCON_PROP_USB_ID 0
116 #define EXTCON_PROP_USB_VBUS 1
117 #define EXTCON_PROP_USB_TYPEC_POLARITY 2
119 #define EXTCON_PROP_USB_MIN 0
120 #define EXTCON_PROP_USB_MAX 2
121 #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
123 /* Properties of EXTCON_TYPE_CHG. */
124 #define EXTCON_PROP_CHG_MIN 50
125 #define EXTCON_PROP_CHG_MAX 50
126 #define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
128 /* Properties of EXTCON_TYPE_JACK. */
129 #define EXTCON_PROP_JACK_MIN 100
130 #define EXTCON_PROP_JACK_MAX 100
131 #define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
133 /* Properties of EXTCON_TYPE_DISP. */
134 #define EXTCON_PROP_DISP_MIN 150
135 #define EXTCON_PROP_DISP_MAX 150
136 #define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
139 * Define the type of property's value.
141 * Define the property's value as union type. Because each property
142 * would need the different data type to store it.
144 union extcon_property_value {
145 int intval; /* type : integer (intval) */
151 * struct extcon_dev - An extcon device represents one external connector.
152 * @name: The name of this extcon device. Parent device name is
154 * @supported_cable: Array of supported cable names ending with EXTCON_NONE.
155 * If supported_cable is NULL, cable name related APIs
157 * @mutually_exclusive: Array of mutually exclusive set of cables that cannot
158 * be attached simultaneously. The array should be
159 * ending with NULL or be NULL (no mutually exclusive
160 * cables). For example, if it is { 0x7, 0x30, 0}, then,
161 * {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
162 * be attached simulataneously. {0x7, 0} is equivalent to
163 * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
164 * can be no simultaneous connections.
165 * @dev: Device of this extcon.
166 * @state: Attach/detach state of this extcon. Do not provide at
168 * @nh: Notifier for the state change events from this extcon
169 * @entry: To support list of extcon devices so that users can
170 * search for extcon devices based on the extcon name.
172 * @max_supported: Internal value to store the number of cables.
173 * @extcon_dev_type: Device_type struct to provide attribute_groups
174 * customized for each extcon device.
175 * @cables: Sysfs subdirectories. Each represents one cable.
177 * In most cases, users only need to provide "User initializing data" of
178 * this struct when registering an extcon. In some exceptional cases,
179 * optional callbacks may be needed. However, the values in "internal data"
180 * are overwritten by register function.
183 /* Optional user initializing data */
185 const unsigned int *supported_cable;
186 const u32 *mutually_exclusive;
188 /* Internal data. Please do not set. */
190 struct raw_notifier_head *nh;
191 struct list_head entry;
193 spinlock_t lock; /* could be called by irq handler */
196 /* /sys/class/extcon/.../cable.n/... */
197 struct device_type extcon_dev_type;
198 struct extcon_cable *cables;
200 /* /sys/class/extcon/.../mutually_exclusive/... */
201 struct attribute_group attr_g_muex;
202 struct attribute **attrs_muex;
203 struct device_attribute *d_attrs_muex;
206 #if IS_ENABLED(CONFIG_EXTCON)
209 * Following APIs are for notifiers or configurations.
210 * Notifiers are the external port and connection devices.
212 extern int extcon_dev_register(struct extcon_dev *edev);
213 extern void extcon_dev_unregister(struct extcon_dev *edev);
214 extern int devm_extcon_dev_register(struct device *dev,
215 struct extcon_dev *edev);
216 extern void devm_extcon_dev_unregister(struct device *dev,
217 struct extcon_dev *edev);
218 extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
221 * Following APIs control the memory of extcon device.
223 extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
224 extern void extcon_dev_free(struct extcon_dev *edev);
225 extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
226 const unsigned int *cable);
227 extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
230 * get/set_state access each bit of the 32b encoded state value.
231 * They are used to access the status of each cable based on the cable id.
233 extern int extcon_get_state(struct extcon_dev *edev, unsigned int id);
234 extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
236 extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
240 * Synchronize the state and property data for a specific external connector.
242 extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
245 * get/set_property access the property value of each external connector.
246 * They are used to access the property of each cable based on the property id.
248 extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
250 union extcon_property_value *prop_val);
251 extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
253 union extcon_property_value prop_val);
254 extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
256 union extcon_property_value prop_val);
259 * get/set_property_capability set the capability of the property for each
260 * external connector. They are used to set the capability of the property
261 * of each external connector based on the id and property.
263 extern int extcon_get_property_capability(struct extcon_dev *edev,
264 unsigned int id, unsigned int prop);
265 extern int extcon_set_property_capability(struct extcon_dev *edev,
266 unsigned int id, unsigned int prop);
269 * Following APIs are to monitor every action of a notifier.
270 * Registrar gets notified for every external port of a connection device.
271 * Probably this could be used to debug an action of notifier; however,
272 * we do not recommend to use this for normal 'notifiee' device drivers who
273 * want to be notified by a specific external port of the notifier.
275 extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
276 struct notifier_block *nb);
277 extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
278 struct notifier_block *nb);
279 extern int devm_extcon_register_notifier(struct device *dev,
280 struct extcon_dev *edev, unsigned int id,
281 struct notifier_block *nb);
282 extern void devm_extcon_unregister_notifier(struct device *dev,
283 struct extcon_dev *edev, unsigned int id,
284 struct notifier_block *nb);
287 * Following API get the extcon device from devicetree.
288 * This function use phandle of devicetree to get extcon device directly.
290 extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
293 /* Following API to get information of extcon device */
294 extern const char *extcon_get_edev_name(struct extcon_dev *edev);
297 #else /* CONFIG_EXTCON */
298 static inline int extcon_dev_register(struct extcon_dev *edev)
303 static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
305 static inline int devm_extcon_dev_register(struct device *dev,
306 struct extcon_dev *edev)
311 static inline void devm_extcon_dev_unregister(struct device *dev,
312 struct extcon_dev *edev) { }
314 static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
316 return ERR_PTR(-ENOSYS);
319 static inline void extcon_dev_free(struct extcon_dev *edev) { }
321 static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
322 const unsigned int *cable)
324 return ERR_PTR(-ENOSYS);
327 static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
330 static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
335 static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
341 static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
347 static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
352 static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
354 union extcon_property_value *prop_val)
358 static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
360 union extcon_property_value prop_val)
365 static inline int extcon_set_property_sync(struct extcon_dev *edev,
366 unsigned int id, unsigned int prop,
367 union extcon_property_value prop_val)
372 static inline int extcon_get_property_capability(struct extcon_dev *edev,
373 unsigned int id, unsigned int prop)
378 static inline int extcon_set_property_capability(struct extcon_dev *edev,
379 unsigned int id, unsigned int prop)
384 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
389 static inline int extcon_register_notifier(struct extcon_dev *edev,
391 struct notifier_block *nb)
396 static inline int extcon_unregister_notifier(struct extcon_dev *edev,
398 struct notifier_block *nb)
403 static inline int devm_extcon_register_notifier(struct device *dev,
404 struct extcon_dev *edev, unsigned int id,
405 struct notifier_block *nb)
410 static inline void devm_extcon_unregister_notifier(struct device *dev,
411 struct extcon_dev *edev, unsigned int id,
412 struct notifier_block *nb) { }
414 static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
417 return ERR_PTR(-ENODEV);
419 #endif /* CONFIG_EXTCON */
422 * Following structure and API are deprecated. EXTCON remains the function
423 * definition to prevent the build break.
425 struct extcon_specific_cable_nb {
426 struct notifier_block *user_nb;
428 struct extcon_dev *edev;
429 unsigned long previous_value;
432 static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
433 const char *extcon_name, const char *cable_name,
434 struct notifier_block *nb)
439 static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
445 static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id)
447 return extcon_get_state(edev, id);
450 static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
453 return extcon_set_state_sync(edev, id, cable_state);
455 #endif /* __LINUX_EXTCON_H__ */