include/linux/extcon.h

   1 /*
   2  *  External connector (extcon) class driver
   3  *
   4  * Copyright (C) 2015 Samsung Electronics
   5  * Author: Chanwoo Choi <cw00.choi@samsung.com>
   6  *
   7  * Copyright (C) 2012 Samsung Electronics
   8  * Author: Donggeun Kim <dg77.kim@samsung.com>
   9  * Author: MyungJoo Ham <myungjoo.ham@samsung.com>
  10  *
  11  * based on switch class driver
  12  * Copyright (C) 2008 Google, Inc.
  13  * Author: Mike Lockwood <lockwood@android.com>
  14  *
  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.
  18  *
  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.
  23  *
  24 */
  25
  26 #ifndef __LINUX_EXTCON_H__
  27 #define __LINUX_EXTCON_H__
  28
  29 #include <linux/device.h>
  30
  31 /*
  32  * Define the type of supported external connectors
  33  */
  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 */
  39
  40 /*
  41  * Define the unique id of supported external connectors
  42  */
  43 #define EXTCON_NONE             0
  44
  45 /* USB external connector */
  46 #define EXTCON_USB              1
  47 #define EXTCON_USB_HOST         2
  48
  49 /*
  50  * Charging external connector
  51  *
  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.
  56  *
  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.
  60  */
  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 */
  69
  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
  79
  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 */
  87
  88 /* Miscellaneous external connector */
  89 #define EXTCON_DOCK             60
  90 #define EXTCON_JIG              61
  91 #define EXTCON_MECHANICAL       62
  92
  93 #define EXTCON_NUM              63
  94
  95 /*
  96  * Define the property of supported external connectors.
  97  *
  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.
 103  *
 104  * The naming style of property
 105  * : EXTCON_PROP_[type]_[property name]
 106  *
 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
 111  */
 112
 113 /*
 114  * Properties of EXTCON_TYPE_USB.
 115  *
 116  * - EXTCON_PROP_USB_VBUS
 117  * @type:       integer (intval)
 118  * @value:      0 (low) or 1 (high)
 119  * @default:    0 (low)
 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)
 128  *
 129  */
 130 #define EXTCON_PROP_USB_VBUS            0
 131 #define EXTCON_PROP_USB_TYPEC_POLARITY  1
 132 #define EXTCON_PROP_USB_SS              2
 133
 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)
 137
 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)
 142
 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)
 147
 148 /*
 149  * Properties of EXTCON_TYPE_DISP.
 150  *
 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)
 155  *
 156  */
 157 #define EXTCON_PROP_DISP_HPD            150
 158
 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)
 163
 164 /*
 165  * Define the type of property's value.
 166  *
 167  * Define the property's value as union type. Because each property
 168  * would need the different data type to store it.
 169  */
 170 union extcon_property_value {
 171         int intval;     /* type : integer (intval) */
 172 };
 173
 174 struct extcon_cable;
 175 struct extcon_dev;
 176
 177 #if IS_ENABLED(CONFIG_EXTCON)
 178
 179 /*
 180  * Following APIs are for notifiers or configurations.
 181  * Notifiers are the external port and connection devices.
 182  */
 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);
 190
 191 /*
 192  * Following APIs control the memory of extcon device.
 193  */
 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);
 199
 200 /*
 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.
 203  */
 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,
 206                                    bool cable_state);
 207 extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
 208                                 bool cable_state);
 209 /*
 210  * Synchronize the state and property data for a specific external connector.
 211  */
 212 extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
 213
 214 /*
 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.
 217  */
 218 extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
 219                                 unsigned int prop,
 220                                 union extcon_property_value *prop_val);
 221 extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
 222                                 unsigned int prop,
 223                                 union extcon_property_value prop_val);
 224 extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
 225                                 unsigned int prop,
 226                                 union extcon_property_value prop_val);
 227
 228 /*
 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.
 232  */
 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);
 237
 238 /*
 239  * Following APIs are to monitor the status change of the external connectors.
 240  * extcon_register_notifier(*edev, id, *nb) : Register a notifier block
 241  *                      for specific external connector of the extcon.
 242  * extcon_register_notifier_all(*edev, *nb) : Register a notifier block
 243  *                      for all supported external connectors of the extcon.
 244  */
 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);
 255
 256 extern int extcon_register_notifier_all(struct extcon_dev *edev,
 257                                 struct notifier_block *nb);
 258 extern int extcon_unregister_notifier_all(struct extcon_dev *edev,
 259                                 struct notifier_block *nb);
 260 extern int devm_extcon_register_notifier_all(struct device *dev,
 261                                 struct extcon_dev *edev,
 262                                 struct notifier_block *nb);
 263 extern void devm_extcon_unregister_notifier_all(struct device *dev,
 264                                 struct extcon_dev *edev,
 265                                 struct notifier_block *nb);
 266
 267 /*
 268  * Following API get the extcon device from devicetree.
 269  * This function use phandle of devicetree to get extcon device directly.
 270  */
 271 extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
 272                                                      int index);
 273
 274 /* Following API to get information of extcon device */
 275 extern const char *extcon_get_edev_name(struct extcon_dev *edev);
 276
 277
 278 #else /* CONFIG_EXTCON */
 279 static inline int extcon_dev_register(struct extcon_dev *edev)
 280 {
 281         return 0;
 282 }
 283
 284 static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
 285
 286 static inline int devm_extcon_dev_register(struct device *dev,
 287                                            struct extcon_dev *edev)
 288 {
 289         return -EINVAL;
 290 }
 291
 292 static inline void devm_extcon_dev_unregister(struct device *dev,
 293                                               struct extcon_dev *edev) { }
 294
 295 static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
 296 {
 297         return ERR_PTR(-ENOSYS);
 298 }
 299
 300 static inline void extcon_dev_free(struct extcon_dev *edev) { }
 301
 302 static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
 303                                                 const unsigned int *cable)
 304 {
 305         return ERR_PTR(-ENOSYS);
 306 }
 307
 308 static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
 309
 310
 311 static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
 312 {
 313         return 0;
 314 }
 315
 316 static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
 317                                 bool cable_state)
 318 {
 319         return 0;
 320 }
 321
 322 static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
 323                                 bool cable_state)
 324 {
 325         return 0;
 326 }
 327
 328 static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
 329 {
 330         return 0;
 331 }
 332
 333 static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
 334                                         unsigned int prop,
 335                                         union extcon_property_value *prop_val)
 336 {
 337         return 0;
 338 }
 339 static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
 340                                         unsigned int prop,
 341                                         union extcon_property_value prop_val)
 342 {
 343         return 0;
 344 }
 345
 346 static inline int extcon_set_property_sync(struct extcon_dev *edev,
 347                                         unsigned int id, unsigned int prop,
 348                                         union extcon_property_value prop_val)
 349 {
 350         return 0;
 351 }
 352
 353 static inline int extcon_get_property_capability(struct extcon_dev *edev,
 354                                         unsigned int id, unsigned int prop)
 355 {
 356         return 0;
 357 }
 358
 359 static inline int extcon_set_property_capability(struct extcon_dev *edev,
 360                                         unsigned int id, unsigned int prop)
 361 {
 362         return 0;
 363 }
 364
 365 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
 366 {
 367         return NULL;
 368 }
 369
 370 static inline int extcon_register_notifier(struct extcon_dev *edev,
 371                                         unsigned int id,
 372                                         struct notifier_block *nb)
 373 {
 374         return 0;
 375 }
 376
 377 static inline int extcon_unregister_notifier(struct extcon_dev *edev,
 378                                         unsigned int id,
 379                                         struct notifier_block *nb)
 380 {
 381         return 0;
 382 }
 383
 384 static inline int devm_extcon_register_notifier(struct device *dev,
 385                                 struct extcon_dev *edev, unsigned int id,
 386                                 struct notifier_block *nb)
 387 {
 388         return -ENOSYS;
 389 }
 390
 391 static inline  void devm_extcon_unregister_notifier(struct device *dev,
 392                                 struct extcon_dev *edev, unsigned int id,
 393                                 struct notifier_block *nb) { }
 394
 395 static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
 396                                                             int index)
 397 {
 398         return ERR_PTR(-ENODEV);
 399 }
 400 #endif /* CONFIG_EXTCON */
 401
 402 /*
 403  * Following structure and API are deprecated. EXTCON remains the function
 404  * definition to prevent the build break.
 405  */
 406 struct extcon_specific_cable_nb {
 407        struct notifier_block *user_nb;
 408        int cable_index;
 409        struct extcon_dev *edev;
 410        unsigned long previous_value;
 411 };
 412
 413 static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
 414                         const char *extcon_name, const char *cable_name,
 415                         struct notifier_block *nb)
 416 {
 417         return -EINVAL;
 418 }
 419
 420 static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
 421                                                     *obj)
 422 {
 423         return -EINVAL;
 424 }
 425
 426 static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id)
 427 {
 428         return extcon_get_state(edev, id);
 429 }
 430
 431 static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
 432                                    bool cable_state)
 433 {
 434         return extcon_set_state_sync(edev, id, cable_state);
 435 }
 436 #endif /* __LINUX_EXTCON_H__ */