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
56 #define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
58 /* Jack external connector */
59 #define EXTCON_JACK_MICROPHONE 20
60 #define EXTCON_JACK_HEADPHONE 21
61 #define EXTCON_JACK_LINE_IN 22
62 #define EXTCON_JACK_LINE_OUT 23
63 #define EXTCON_JACK_VIDEO_IN 24
64 #define EXTCON_JACK_VIDEO_OUT 25
65 #define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
66 #define EXTCON_JACK_SPDIF_OUT 27
68 /* Display external connector */
69 #define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
70 #define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
71 #define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
72 #define EXTCON_DISP_VGA 43 /* Video Graphics Array */
73 #define EXTCON_DISP_DP 44 /* Display Port */
74 #define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
76 /* Miscellaneous external connector */
77 #define EXTCON_DOCK 60
79 #define EXTCON_MECHANICAL 62
84 * Define the property of supported external connectors.
86 * When adding the new extcon property, they *must* have
87 * the type/value/default information. Also, you *have to*
88 * modify the EXTCON_PROP_[type]_START/END definitions
89 * which mean the range of the supported properties
90 * for each extcon type.
92 * The naming style of property
93 * : EXTCON_PROP_[type]_[property name]
95 * EXTCON_PROP_USB_[property name] : USB property
96 * EXTCON_PROP_CHG_[property name] : Charger property
97 * EXTCON_PROP_JACK_[property name] : Jack property
98 * EXTCON_PROP_DISP_[property name] : Display property
102 * Properties of EXTCON_TYPE_USB.
104 * - EXTCON_PROP_USB_VBUS
105 * @type: integer (intval)
106 * @value: 0 (low) or 1 (high)
108 * - EXTCON_PROP_USB_TYPEC_POLARITY
109 * @type: integer (intval)
110 * @value: 0 (normal) or 1 (flip)
111 * @default: 0 (normal)
112 * - EXTCON_PROP_USB_SS (SuperSpeed)
113 * @type: integer (intval)
114 * @value: 0 (USB/USB2) or 1 (USB3)
115 * @default: 0 (USB/USB2)
118 #define EXTCON_PROP_USB_VBUS 0
119 #define EXTCON_PROP_USB_TYPEC_POLARITY 1
120 #define EXTCON_PROP_USB_SS 2
122 #define EXTCON_PROP_USB_MIN 0
123 #define EXTCON_PROP_USB_MAX 2
124 #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
126 /* Properties of EXTCON_TYPE_CHG. */
127 #define EXTCON_PROP_CHG_MIN 50
128 #define EXTCON_PROP_CHG_MAX 50
129 #define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
131 /* Properties of EXTCON_TYPE_JACK. */
132 #define EXTCON_PROP_JACK_MIN 100
133 #define EXTCON_PROP_JACK_MAX 100
134 #define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
136 /* Properties of EXTCON_TYPE_DISP. */
137 #define EXTCON_PROP_DISP_MIN 150
138 #define EXTCON_PROP_DISP_MAX 150
139 #define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
142 * Define the type of property's value.
144 * Define the property's value as union type. Because each property
145 * would need the different data type to store it.
147 union extcon_property_value
{
148 int intval
; /* type : integer (intval) */
154 * struct extcon_dev - An extcon device represents one external connector.
155 * @name: The name of this extcon device. Parent device name is
157 * @supported_cable: Array of supported cable names ending with EXTCON_NONE.
158 * If supported_cable is NULL, cable name related APIs
160 * @mutually_exclusive: Array of mutually exclusive set of cables that cannot
161 * be attached simultaneously. The array should be
162 * ending with NULL or be NULL (no mutually exclusive
163 * cables). For example, if it is { 0x7, 0x30, 0}, then,
164 * {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
165 * be attached simulataneously. {0x7, 0} is equivalent to
166 * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
167 * can be no simultaneous connections.
168 * @dev: Device of this extcon.
169 * @state: Attach/detach state of this extcon. Do not provide at
171 * @nh: Notifier for the state change events from this extcon
172 * @entry: To support list of extcon devices so that users can
173 * search for extcon devices based on the extcon name.
175 * @max_supported: Internal value to store the number of cables.
176 * @extcon_dev_type: Device_type struct to provide attribute_groups
177 * customized for each extcon device.
178 * @cables: Sysfs subdirectories. Each represents one cable.
180 * In most cases, users only need to provide "User initializing data" of
181 * this struct when registering an extcon. In some exceptional cases,
182 * optional callbacks may be needed. However, the values in "internal data"
183 * are overwritten by register function.
186 /* Optional user initializing data */
188 const unsigned int *supported_cable
;
189 const u32
*mutually_exclusive
;
191 /* Internal data. Please do not set. */
193 struct raw_notifier_head
*nh
;
194 struct list_head entry
;
196 spinlock_t lock
; /* could be called by irq handler */
199 /* /sys/class/extcon/.../cable.n/... */
200 struct device_type extcon_dev_type
;
201 struct extcon_cable
*cables
;
203 /* /sys/class/extcon/.../mutually_exclusive/... */
204 struct attribute_group attr_g_muex
;
205 struct attribute
**attrs_muex
;
206 struct device_attribute
*d_attrs_muex
;
209 #if IS_ENABLED(CONFIG_EXTCON)
212 * Following APIs are for notifiers or configurations.
213 * Notifiers are the external port and connection devices.
215 extern int extcon_dev_register(struct extcon_dev
*edev
);
216 extern void extcon_dev_unregister(struct extcon_dev
*edev
);
217 extern int devm_extcon_dev_register(struct device
*dev
,
218 struct extcon_dev
*edev
);
219 extern void devm_extcon_dev_unregister(struct device
*dev
,
220 struct extcon_dev
*edev
);
221 extern struct extcon_dev
*extcon_get_extcon_dev(const char *extcon_name
);
224 * Following APIs control the memory of extcon device.
226 extern struct extcon_dev
*extcon_dev_allocate(const unsigned int *cable
);
227 extern void extcon_dev_free(struct extcon_dev
*edev
);
228 extern struct extcon_dev
*devm_extcon_dev_allocate(struct device
*dev
,
229 const unsigned int *cable
);
230 extern void devm_extcon_dev_free(struct device
*dev
, struct extcon_dev
*edev
);
233 * get/set_state access each bit of the 32b encoded state value.
234 * They are used to access the status of each cable based on the cable id.
236 extern int extcon_get_state(struct extcon_dev
*edev
, unsigned int id
);
237 extern int extcon_set_state(struct extcon_dev
*edev
, unsigned int id
,
239 extern int extcon_set_state_sync(struct extcon_dev
*edev
, unsigned int id
,
243 * Synchronize the state and property data for a specific external connector.
245 extern int extcon_sync(struct extcon_dev
*edev
, unsigned int id
);
248 * get/set_property access the property value of each external connector.
249 * They are used to access the property of each cable based on the property id.
251 extern int extcon_get_property(struct extcon_dev
*edev
, unsigned int id
,
253 union extcon_property_value
*prop_val
);
254 extern int extcon_set_property(struct extcon_dev
*edev
, unsigned int id
,
256 union extcon_property_value prop_val
);
257 extern int extcon_set_property_sync(struct extcon_dev
*edev
, unsigned int id
,
259 union extcon_property_value prop_val
);
262 * get/set_property_capability set the capability of the property for each
263 * external connector. They are used to set the capability of the property
264 * of each external connector based on the id and property.
266 extern int extcon_get_property_capability(struct extcon_dev
*edev
,
267 unsigned int id
, unsigned int prop
);
268 extern int extcon_set_property_capability(struct extcon_dev
*edev
,
269 unsigned int id
, unsigned int prop
);
272 * Following APIs are to monitor every action of a notifier.
273 * Registrar gets notified for every external port of a connection device.
274 * Probably this could be used to debug an action of notifier; however,
275 * we do not recommend to use this for normal 'notifiee' device drivers who
276 * want to be notified by a specific external port of the notifier.
278 extern int extcon_register_notifier(struct extcon_dev
*edev
, unsigned int id
,
279 struct notifier_block
*nb
);
280 extern int extcon_unregister_notifier(struct extcon_dev
*edev
, unsigned int id
,
281 struct notifier_block
*nb
);
282 extern int devm_extcon_register_notifier(struct device
*dev
,
283 struct extcon_dev
*edev
, unsigned int id
,
284 struct notifier_block
*nb
);
285 extern void devm_extcon_unregister_notifier(struct device
*dev
,
286 struct extcon_dev
*edev
, unsigned int id
,
287 struct notifier_block
*nb
);
290 * Following API get the extcon device from devicetree.
291 * This function use phandle of devicetree to get extcon device directly.
293 extern struct extcon_dev
*extcon_get_edev_by_phandle(struct device
*dev
,
296 /* Following API to get information of extcon device */
297 extern const char *extcon_get_edev_name(struct extcon_dev
*edev
);
300 #else /* CONFIG_EXTCON */
301 static inline int extcon_dev_register(struct extcon_dev
*edev
)
306 static inline void extcon_dev_unregister(struct extcon_dev
*edev
) { }
308 static inline int devm_extcon_dev_register(struct device
*dev
,
309 struct extcon_dev
*edev
)
314 static inline void devm_extcon_dev_unregister(struct device
*dev
,
315 struct extcon_dev
*edev
) { }
317 static inline struct extcon_dev
*extcon_dev_allocate(const unsigned int *cable
)
319 return ERR_PTR(-ENOSYS
);
322 static inline void extcon_dev_free(struct extcon_dev
*edev
) { }
324 static inline struct extcon_dev
*devm_extcon_dev_allocate(struct device
*dev
,
325 const unsigned int *cable
)
327 return ERR_PTR(-ENOSYS
);
330 static inline void devm_extcon_dev_free(struct extcon_dev
*edev
) { }
333 static inline int extcon_get_state(struct extcon_dev
*edev
, unsigned int id
)
338 static inline int extcon_set_state(struct extcon_dev
*edev
, unsigned int id
,
344 static inline int extcon_set_state_sync(struct extcon_dev
*edev
, unsigned int id
,
350 static inline int extcon_sync(struct extcon_dev
*edev
, unsigned int id
)
355 static inline int extcon_get_property(struct extcon_dev
*edev
, unsigned int id
,
357 union extcon_property_value
*prop_val
)
361 static inline int extcon_set_property(struct extcon_dev
*edev
, unsigned int id
,
363 union extcon_property_value prop_val
)
368 static inline int extcon_set_property_sync(struct extcon_dev
*edev
,
369 unsigned int id
, unsigned int prop
,
370 union extcon_property_value prop_val
)
375 static inline int extcon_get_property_capability(struct extcon_dev
*edev
,
376 unsigned int id
, unsigned int prop
)
381 static inline int extcon_set_property_capability(struct extcon_dev
*edev
,
382 unsigned int id
, unsigned int prop
)
387 static inline struct extcon_dev
*extcon_get_extcon_dev(const char *extcon_name
)
392 static inline int extcon_register_notifier(struct extcon_dev
*edev
,
394 struct notifier_block
*nb
)
399 static inline int extcon_unregister_notifier(struct extcon_dev
*edev
,
401 struct notifier_block
*nb
)
406 static inline int devm_extcon_register_notifier(struct device
*dev
,
407 struct extcon_dev
*edev
, unsigned int id
,
408 struct notifier_block
*nb
)
413 static inline void devm_extcon_unregister_notifier(struct device
*dev
,
414 struct extcon_dev
*edev
, unsigned int id
,
415 struct notifier_block
*nb
) { }
417 static inline struct extcon_dev
*extcon_get_edev_by_phandle(struct device
*dev
,
420 return ERR_PTR(-ENODEV
);
422 #endif /* CONFIG_EXTCON */
425 * Following structure and API are deprecated. EXTCON remains the function
426 * definition to prevent the build break.
428 struct extcon_specific_cable_nb
{
429 struct notifier_block
*user_nb
;
431 struct extcon_dev
*edev
;
432 unsigned long previous_value
;
435 static inline int extcon_register_interest(struct extcon_specific_cable_nb
*obj
,
436 const char *extcon_name
, const char *cable_name
,
437 struct notifier_block
*nb
)
442 static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
448 static inline int extcon_get_cable_state_(struct extcon_dev
*edev
, unsigned int id
)
450 return extcon_get_state(edev
, id
);
453 static inline int extcon_set_cable_state_(struct extcon_dev
*edev
, unsigned int id
,
456 return extcon_set_state_sync(edev
, id
, cable_state
);
458 #endif /* __LINUX_EXTCON_H__ */