19c92ab61SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2f68a8342SChanwoo Choi /* 3b9ec23c0SChanwoo Choi * drivers/extcon/extcon.c - External Connector (extcon) framework. 4f68a8342SChanwoo Choi * 52a9de9c0SChanwoo Choi * Copyright (C) 2015 Samsung Electronics 62a9de9c0SChanwoo Choi * Author: Chanwoo Choi <cw00.choi@samsung.com> 72a9de9c0SChanwoo Choi * 8f68a8342SChanwoo Choi * Copyright (C) 2012 Samsung Electronics 9f68a8342SChanwoo Choi * Author: Donggeun Kim <dg77.kim@samsung.com> 10f68a8342SChanwoo Choi * Author: MyungJoo Ham <myungjoo.ham@samsung.com> 11f68a8342SChanwoo Choi * 12f68a8342SChanwoo Choi * based on android/drivers/switch/switch_class.c 13f68a8342SChanwoo Choi * Copyright (C) 2008 Google, Inc. 14f68a8342SChanwoo Choi * Author: Mike Lockwood <lockwood@android.com> 15f68a8342SChanwoo Choi */ 16f68a8342SChanwoo Choi 17f68a8342SChanwoo Choi #include <linux/module.h> 18f68a8342SChanwoo Choi #include <linux/types.h> 19f68a8342SChanwoo Choi #include <linux/init.h> 20f68a8342SChanwoo Choi #include <linux/device.h> 21f68a8342SChanwoo Choi #include <linux/fs.h> 22f68a8342SChanwoo Choi #include <linux/err.h> 23f68a8342SChanwoo Choi #include <linux/of.h> 24f68a8342SChanwoo Choi #include <linux/slab.h> 25f68a8342SChanwoo Choi #include <linux/sysfs.h> 26f68a8342SChanwoo Choi 27e6cf0465SChanwoo Choi #include "extcon.h" 28e6cf0465SChanwoo Choi 292a9de9c0SChanwoo Choi #define SUPPORTED_CABLE_MAX 32 302a9de9c0SChanwoo Choi 315183240cSColin Ian King static const struct __extcon_info { 3255e4e2f1SChanwoo Choi unsigned int type; 3355e4e2f1SChanwoo Choi unsigned int id; 3455e4e2f1SChanwoo Choi const char *name; 3555e4e2f1SChanwoo Choi 3655e4e2f1SChanwoo Choi } extcon_info[] = { 3755e4e2f1SChanwoo Choi [EXTCON_NONE] = { 3855e4e2f1SChanwoo Choi .type = EXTCON_TYPE_MISC, 3955e4e2f1SChanwoo Choi .id = EXTCON_NONE, 4055e4e2f1SChanwoo Choi .name = "NONE", 4155e4e2f1SChanwoo Choi }, 4273b6ecdbSChanwoo Choi 438e9bc36dSChanwoo Choi /* USB external connector */ 4455e4e2f1SChanwoo Choi [EXTCON_USB] = { 4555e4e2f1SChanwoo Choi .type = EXTCON_TYPE_USB, 4655e4e2f1SChanwoo Choi .id = EXTCON_USB, 4755e4e2f1SChanwoo Choi .name = "USB", 4855e4e2f1SChanwoo Choi }, 4955e4e2f1SChanwoo Choi [EXTCON_USB_HOST] = { 5055e4e2f1SChanwoo Choi .type = EXTCON_TYPE_USB, 5155e4e2f1SChanwoo Choi .id = EXTCON_USB_HOST, 5286d6cda6SChanwoo Choi .name = "USB-HOST", 5355e4e2f1SChanwoo Choi }, 548e9bc36dSChanwoo Choi 5511eecf91SChanwoo Choi /* Charging external connector */ 5655e4e2f1SChanwoo Choi [EXTCON_CHG_USB_SDP] = { 5755e4e2f1SChanwoo Choi .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 5855e4e2f1SChanwoo Choi .id = EXTCON_CHG_USB_SDP, 5955e4e2f1SChanwoo Choi .name = "SDP", 6055e4e2f1SChanwoo Choi }, 6155e4e2f1SChanwoo Choi [EXTCON_CHG_USB_DCP] = { 6255e4e2f1SChanwoo Choi .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 6355e4e2f1SChanwoo Choi .id = EXTCON_CHG_USB_DCP, 6455e4e2f1SChanwoo Choi .name = "DCP", 6555e4e2f1SChanwoo Choi }, 6655e4e2f1SChanwoo Choi [EXTCON_CHG_USB_CDP] = { 6755e4e2f1SChanwoo Choi .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 6855e4e2f1SChanwoo Choi .id = EXTCON_CHG_USB_CDP, 6955e4e2f1SChanwoo Choi .name = "CDP", 7055e4e2f1SChanwoo Choi }, 7155e4e2f1SChanwoo Choi [EXTCON_CHG_USB_ACA] = { 7255e4e2f1SChanwoo Choi .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 7355e4e2f1SChanwoo Choi .id = EXTCON_CHG_USB_ACA, 7455e4e2f1SChanwoo Choi .name = "ACA", 7555e4e2f1SChanwoo Choi }, 7655e4e2f1SChanwoo Choi [EXTCON_CHG_USB_FAST] = { 7755e4e2f1SChanwoo Choi .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 7855e4e2f1SChanwoo Choi .id = EXTCON_CHG_USB_FAST, 7955e4e2f1SChanwoo Choi .name = "FAST-CHARGER", 8055e4e2f1SChanwoo Choi }, 8155e4e2f1SChanwoo Choi [EXTCON_CHG_USB_SLOW] = { 8255e4e2f1SChanwoo Choi .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 8355e4e2f1SChanwoo Choi .id = EXTCON_CHG_USB_SLOW, 8455e4e2f1SChanwoo Choi .name = "SLOW-CHARGER", 8555e4e2f1SChanwoo Choi }, 867fe95fb8SChanwoo Choi [EXTCON_CHG_WPT] = { 877fe95fb8SChanwoo Choi .type = EXTCON_TYPE_CHG, 887fe95fb8SChanwoo Choi .id = EXTCON_CHG_WPT, 897fe95fb8SChanwoo Choi .name = "WPT", 907fe95fb8SChanwoo Choi }, 913c5f0e07SChanwoo Choi [EXTCON_CHG_USB_PD] = { 923c5f0e07SChanwoo Choi .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 933c5f0e07SChanwoo Choi .id = EXTCON_CHG_USB_PD, 943c5f0e07SChanwoo Choi .name = "PD", 953c5f0e07SChanwoo Choi }, 968e9bc36dSChanwoo Choi 9711eecf91SChanwoo Choi /* Jack external connector */ 9855e4e2f1SChanwoo Choi [EXTCON_JACK_MICROPHONE] = { 9955e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 10055e4e2f1SChanwoo Choi .id = EXTCON_JACK_MICROPHONE, 10155e4e2f1SChanwoo Choi .name = "MICROPHONE", 10255e4e2f1SChanwoo Choi }, 10355e4e2f1SChanwoo Choi [EXTCON_JACK_HEADPHONE] = { 10455e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 10555e4e2f1SChanwoo Choi .id = EXTCON_JACK_HEADPHONE, 10655e4e2f1SChanwoo Choi .name = "HEADPHONE", 10755e4e2f1SChanwoo Choi }, 10855e4e2f1SChanwoo Choi [EXTCON_JACK_LINE_IN] = { 10955e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 11055e4e2f1SChanwoo Choi .id = EXTCON_JACK_LINE_IN, 11155e4e2f1SChanwoo Choi .name = "LINE-IN", 11255e4e2f1SChanwoo Choi }, 11355e4e2f1SChanwoo Choi [EXTCON_JACK_LINE_OUT] = { 11455e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 11555e4e2f1SChanwoo Choi .id = EXTCON_JACK_LINE_OUT, 11655e4e2f1SChanwoo Choi .name = "LINE-OUT", 11755e4e2f1SChanwoo Choi }, 11855e4e2f1SChanwoo Choi [EXTCON_JACK_VIDEO_IN] = { 11955e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 12055e4e2f1SChanwoo Choi .id = EXTCON_JACK_VIDEO_IN, 12155e4e2f1SChanwoo Choi .name = "VIDEO-IN", 12255e4e2f1SChanwoo Choi }, 12355e4e2f1SChanwoo Choi [EXTCON_JACK_VIDEO_OUT] = { 12455e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 12555e4e2f1SChanwoo Choi .id = EXTCON_JACK_VIDEO_OUT, 12655e4e2f1SChanwoo Choi .name = "VIDEO-OUT", 12755e4e2f1SChanwoo Choi }, 12855e4e2f1SChanwoo Choi [EXTCON_JACK_SPDIF_IN] = { 12955e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 13055e4e2f1SChanwoo Choi .id = EXTCON_JACK_SPDIF_IN, 13155e4e2f1SChanwoo Choi .name = "SPDIF-IN", 13255e4e2f1SChanwoo Choi }, 13355e4e2f1SChanwoo Choi [EXTCON_JACK_SPDIF_OUT] = { 13455e4e2f1SChanwoo Choi .type = EXTCON_TYPE_JACK, 13555e4e2f1SChanwoo Choi .id = EXTCON_JACK_SPDIF_OUT, 13655e4e2f1SChanwoo Choi .name = "SPDIF-OUT", 13755e4e2f1SChanwoo Choi }, 1388e9bc36dSChanwoo Choi 13911eecf91SChanwoo Choi /* Display external connector */ 14055e4e2f1SChanwoo Choi [EXTCON_DISP_HDMI] = { 14155e4e2f1SChanwoo Choi .type = EXTCON_TYPE_DISP, 14255e4e2f1SChanwoo Choi .id = EXTCON_DISP_HDMI, 14355e4e2f1SChanwoo Choi .name = "HDMI", 14455e4e2f1SChanwoo Choi }, 14555e4e2f1SChanwoo Choi [EXTCON_DISP_MHL] = { 14655e4e2f1SChanwoo Choi .type = EXTCON_TYPE_DISP, 14755e4e2f1SChanwoo Choi .id = EXTCON_DISP_MHL, 14855e4e2f1SChanwoo Choi .name = "MHL", 14955e4e2f1SChanwoo Choi }, 15055e4e2f1SChanwoo Choi [EXTCON_DISP_DVI] = { 15155e4e2f1SChanwoo Choi .type = EXTCON_TYPE_DISP, 15255e4e2f1SChanwoo Choi .id = EXTCON_DISP_DVI, 15355e4e2f1SChanwoo Choi .name = "DVI", 15455e4e2f1SChanwoo Choi }, 15555e4e2f1SChanwoo Choi [EXTCON_DISP_VGA] = { 15655e4e2f1SChanwoo Choi .type = EXTCON_TYPE_DISP, 15755e4e2f1SChanwoo Choi .id = EXTCON_DISP_VGA, 15855e4e2f1SChanwoo Choi .name = "VGA", 15955e4e2f1SChanwoo Choi }, 1602164188dSChris Zhong [EXTCON_DISP_DP] = { 1612164188dSChris Zhong .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, 1622164188dSChris Zhong .id = EXTCON_DISP_DP, 1632164188dSChris Zhong .name = "DP", 1642164188dSChris Zhong }, 1659c0595d6SChanwoo Choi [EXTCON_DISP_HMD] = { 1669c0595d6SChanwoo Choi .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, 1679c0595d6SChanwoo Choi .id = EXTCON_DISP_HMD, 1689c0595d6SChanwoo Choi .name = "HMD", 1699c0595d6SChanwoo Choi }, 1708e9bc36dSChanwoo Choi 17111eecf91SChanwoo Choi /* Miscellaneous external connector */ 17255e4e2f1SChanwoo Choi [EXTCON_DOCK] = { 17355e4e2f1SChanwoo Choi .type = EXTCON_TYPE_MISC, 17455e4e2f1SChanwoo Choi .id = EXTCON_DOCK, 17555e4e2f1SChanwoo Choi .name = "DOCK", 17655e4e2f1SChanwoo Choi }, 17755e4e2f1SChanwoo Choi [EXTCON_JIG] = { 17855e4e2f1SChanwoo Choi .type = EXTCON_TYPE_MISC, 17955e4e2f1SChanwoo Choi .id = EXTCON_JIG, 18055e4e2f1SChanwoo Choi .name = "JIG", 18155e4e2f1SChanwoo Choi }, 18255e4e2f1SChanwoo Choi [EXTCON_MECHANICAL] = { 18355e4e2f1SChanwoo Choi .type = EXTCON_TYPE_MISC, 18455e4e2f1SChanwoo Choi .id = EXTCON_MECHANICAL, 18555e4e2f1SChanwoo Choi .name = "MECHANICAL", 18655e4e2f1SChanwoo Choi }, 1878e9bc36dSChanwoo Choi 18855e4e2f1SChanwoo Choi { /* sentinel */ } 189f68a8342SChanwoo Choi }; 190f68a8342SChanwoo Choi 19120f7b53dSChanwoo Choi /** 1926ab6094fSChanwoo Choi * struct extcon_cable - An internal data for an external connector. 1936ab6094fSChanwoo Choi * @edev: the extcon device 1946ab6094fSChanwoo Choi * @cable_index: the index of this cable in the edev 1956ab6094fSChanwoo Choi * @attr_g: the attribute group for the cable 19620f7b53dSChanwoo Choi * @attr_name: "name" sysfs entry 19720f7b53dSChanwoo Choi * @attr_state: "state" sysfs entry 1986ab6094fSChanwoo Choi * @attrs: the array pointing to attr_name and attr_state for attr_g 19920f7b53dSChanwoo Choi */ 20020f7b53dSChanwoo Choi struct extcon_cable { 20120f7b53dSChanwoo Choi struct extcon_dev *edev; 20220f7b53dSChanwoo Choi int cable_index; 20320f7b53dSChanwoo Choi 20420f7b53dSChanwoo Choi struct attribute_group attr_g; 20520f7b53dSChanwoo Choi struct device_attribute attr_name; 20620f7b53dSChanwoo Choi struct device_attribute attr_state; 20720f7b53dSChanwoo Choi 20820f7b53dSChanwoo Choi struct attribute *attrs[3]; /* to be fed to attr_g.attrs */ 209792e7e9eSChanwoo Choi 210792e7e9eSChanwoo Choi union extcon_property_value usb_propval[EXTCON_PROP_USB_CNT]; 211792e7e9eSChanwoo Choi union extcon_property_value chg_propval[EXTCON_PROP_CHG_CNT]; 212792e7e9eSChanwoo Choi union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT]; 213792e7e9eSChanwoo Choi union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT]; 2147f2a0a16SChanwoo Choi 2157f2a0a16SChanwoo Choi unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)]; 2167f2a0a16SChanwoo Choi unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)]; 2177f2a0a16SChanwoo Choi unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)]; 2187f2a0a16SChanwoo Choi unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)]; 21920f7b53dSChanwoo Choi }; 22020f7b53dSChanwoo Choi 221f68a8342SChanwoo Choi static struct class *extcon_class; 222f68a8342SChanwoo Choi 223f68a8342SChanwoo Choi static LIST_HEAD(extcon_dev_list); 224f68a8342SChanwoo Choi static DEFINE_MUTEX(extcon_dev_list_lock); 225f68a8342SChanwoo Choi 226f68a8342SChanwoo Choi static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) 227f68a8342SChanwoo Choi { 228f68a8342SChanwoo Choi int i = 0; 229f68a8342SChanwoo Choi 230f68a8342SChanwoo Choi if (!edev->mutually_exclusive) 231f68a8342SChanwoo Choi return 0; 232f68a8342SChanwoo Choi 233f68a8342SChanwoo Choi for (i = 0; edev->mutually_exclusive[i]; i++) { 234f68a8342SChanwoo Choi int weight; 235f68a8342SChanwoo Choi u32 correspondants = new_state & edev->mutually_exclusive[i]; 236f68a8342SChanwoo Choi 237f68a8342SChanwoo Choi /* calculate the total number of bits set */ 238f68a8342SChanwoo Choi weight = hweight32(correspondants); 239f68a8342SChanwoo Choi if (weight > 1) 240f68a8342SChanwoo Choi return i + 1; 241f68a8342SChanwoo Choi } 242f68a8342SChanwoo Choi 243f68a8342SChanwoo Choi return 0; 244f68a8342SChanwoo Choi } 245f68a8342SChanwoo Choi 24673b6ecdbSChanwoo Choi static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id) 2472a9de9c0SChanwoo Choi { 2482a9de9c0SChanwoo Choi int i; 2492a9de9c0SChanwoo Choi 2502a9de9c0SChanwoo Choi /* Find the the index of extcon cable in edev->supported_cable */ 2512a9de9c0SChanwoo Choi for (i = 0; i < edev->max_supported; i++) { 2522a9de9c0SChanwoo Choi if (edev->supported_cable[i] == id) 2532a9de9c0SChanwoo Choi return i; 2542a9de9c0SChanwoo Choi } 2552a9de9c0SChanwoo Choi 2562a9de9c0SChanwoo Choi return -EINVAL; 2572a9de9c0SChanwoo Choi } 2582a9de9c0SChanwoo Choi 259792e7e9eSChanwoo Choi static int get_extcon_type(unsigned int prop) 260792e7e9eSChanwoo Choi { 261792e7e9eSChanwoo Choi switch (prop) { 262792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 263792e7e9eSChanwoo Choi return EXTCON_TYPE_USB; 264792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 265792e7e9eSChanwoo Choi return EXTCON_TYPE_CHG; 266792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 267792e7e9eSChanwoo Choi return EXTCON_TYPE_JACK; 268792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 269792e7e9eSChanwoo Choi return EXTCON_TYPE_DISP; 270792e7e9eSChanwoo Choi default: 271792e7e9eSChanwoo Choi return -EINVAL; 272792e7e9eSChanwoo Choi } 273792e7e9eSChanwoo Choi } 274792e7e9eSChanwoo Choi 275792e7e9eSChanwoo Choi static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index) 276792e7e9eSChanwoo Choi { 277792e7e9eSChanwoo Choi return !!(edev->state & BIT(index)); 278792e7e9eSChanwoo Choi } 279792e7e9eSChanwoo Choi 280ab11af04SChanwoo Choi static bool is_extcon_changed(struct extcon_dev *edev, int index, 281ab11af04SChanwoo Choi bool new_state) 282046050f6SChanwoo Choi { 283ab11af04SChanwoo Choi int state = !!(edev->state & BIT(index)); 284ab11af04SChanwoo Choi return (state != new_state); 285046050f6SChanwoo Choi } 286046050f6SChanwoo Choi 287792e7e9eSChanwoo Choi static bool is_extcon_property_supported(unsigned int id, unsigned int prop) 288792e7e9eSChanwoo Choi { 289792e7e9eSChanwoo Choi int type; 290792e7e9eSChanwoo Choi 291792e7e9eSChanwoo Choi /* Check whether the property is supported or not. */ 292792e7e9eSChanwoo Choi type = get_extcon_type(prop); 293792e7e9eSChanwoo Choi if (type < 0) 294792e7e9eSChanwoo Choi return false; 295792e7e9eSChanwoo Choi 296792e7e9eSChanwoo Choi /* Check whether a specific extcon id supports the property or not. */ 297792e7e9eSChanwoo Choi return !!(extcon_info[id].type & type); 298792e7e9eSChanwoo Choi } 299792e7e9eSChanwoo Choi 3007f2a0a16SChanwoo Choi static int is_extcon_property_capability(struct extcon_dev *edev, 3017f2a0a16SChanwoo Choi unsigned int id, int index,unsigned int prop) 3027f2a0a16SChanwoo Choi { 3037f2a0a16SChanwoo Choi struct extcon_cable *cable; 3047f2a0a16SChanwoo Choi int type, ret; 3057f2a0a16SChanwoo Choi 3067f2a0a16SChanwoo Choi /* Check whether the property is supported or not. */ 3077f2a0a16SChanwoo Choi type = get_extcon_type(prop); 3087f2a0a16SChanwoo Choi if (type < 0) 3097f2a0a16SChanwoo Choi return type; 3107f2a0a16SChanwoo Choi 3117f2a0a16SChanwoo Choi cable = &edev->cables[index]; 3127f2a0a16SChanwoo Choi 3137f2a0a16SChanwoo Choi switch (type) { 3147f2a0a16SChanwoo Choi case EXTCON_TYPE_USB: 3157f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); 3167f2a0a16SChanwoo Choi break; 3177f2a0a16SChanwoo Choi case EXTCON_TYPE_CHG: 3187f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); 3197f2a0a16SChanwoo Choi break; 3207f2a0a16SChanwoo Choi case EXTCON_TYPE_JACK: 3217f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); 3227f2a0a16SChanwoo Choi break; 3237f2a0a16SChanwoo Choi case EXTCON_TYPE_DISP: 3247f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); 3257f2a0a16SChanwoo Choi break; 3267f2a0a16SChanwoo Choi default: 3277f2a0a16SChanwoo Choi ret = -EINVAL; 3287f2a0a16SChanwoo Choi } 3297f2a0a16SChanwoo Choi 3307f2a0a16SChanwoo Choi return ret; 3317f2a0a16SChanwoo Choi } 3327f2a0a16SChanwoo Choi 333792e7e9eSChanwoo Choi static void init_property(struct extcon_dev *edev, unsigned int id, int index) 334792e7e9eSChanwoo Choi { 335792e7e9eSChanwoo Choi unsigned int type = extcon_info[id].type; 336792e7e9eSChanwoo Choi struct extcon_cable *cable = &edev->cables[index]; 337792e7e9eSChanwoo Choi 338792e7e9eSChanwoo Choi if (EXTCON_TYPE_USB & type) 339792e7e9eSChanwoo Choi memset(cable->usb_propval, 0, sizeof(cable->usb_propval)); 340792e7e9eSChanwoo Choi if (EXTCON_TYPE_CHG & type) 341792e7e9eSChanwoo Choi memset(cable->chg_propval, 0, sizeof(cable->chg_propval)); 342792e7e9eSChanwoo Choi if (EXTCON_TYPE_JACK & type) 343792e7e9eSChanwoo Choi memset(cable->jack_propval, 0, sizeof(cable->jack_propval)); 344792e7e9eSChanwoo Choi if (EXTCON_TYPE_DISP & type) 345792e7e9eSChanwoo Choi memset(cable->disp_propval, 0, sizeof(cable->disp_propval)); 346792e7e9eSChanwoo Choi } 347792e7e9eSChanwoo Choi 348f68a8342SChanwoo Choi static ssize_t state_show(struct device *dev, struct device_attribute *attr, 349f68a8342SChanwoo Choi char *buf) 350f68a8342SChanwoo Choi { 351f68a8342SChanwoo Choi int i, count = 0; 352f68a8342SChanwoo Choi struct extcon_dev *edev = dev_get_drvdata(dev); 353f68a8342SChanwoo Choi 354f68a8342SChanwoo Choi if (edev->max_supported == 0) 355f68a8342SChanwoo Choi return sprintf(buf, "%u\n", edev->state); 356f68a8342SChanwoo Choi 3572a9de9c0SChanwoo Choi for (i = 0; i < edev->max_supported; i++) { 358f68a8342SChanwoo Choi count += sprintf(buf + count, "%s=%d\n", 35955e4e2f1SChanwoo Choi extcon_info[edev->supported_cable[i]].name, 36070641a0aSChanwoo Choi !!(edev->state & BIT(i))); 361f68a8342SChanwoo Choi } 362f68a8342SChanwoo Choi 363f68a8342SChanwoo Choi return count; 364f68a8342SChanwoo Choi } 3655d5321e9SChanwoo Choi static DEVICE_ATTR_RO(state); 366f68a8342SChanwoo Choi 367f68a8342SChanwoo Choi static ssize_t name_show(struct device *dev, struct device_attribute *attr, 368f68a8342SChanwoo Choi char *buf) 369f68a8342SChanwoo Choi { 370f68a8342SChanwoo Choi struct extcon_dev *edev = dev_get_drvdata(dev); 371f68a8342SChanwoo Choi 37271c3ffa5SChanwoo Choi return sprintf(buf, "%s\n", edev->name); 373f68a8342SChanwoo Choi } 374f68a8342SChanwoo Choi static DEVICE_ATTR_RO(name); 375f68a8342SChanwoo Choi 376f68a8342SChanwoo Choi static ssize_t cable_name_show(struct device *dev, 377f68a8342SChanwoo Choi struct device_attribute *attr, char *buf) 378f68a8342SChanwoo Choi { 379f68a8342SChanwoo Choi struct extcon_cable *cable = container_of(attr, struct extcon_cable, 380f68a8342SChanwoo Choi attr_name); 3812a9de9c0SChanwoo Choi int i = cable->cable_index; 382f68a8342SChanwoo Choi 383f68a8342SChanwoo Choi return sprintf(buf, "%s\n", 38455e4e2f1SChanwoo Choi extcon_info[cable->edev->supported_cable[i]].name); 385f68a8342SChanwoo Choi } 386f68a8342SChanwoo Choi 387f68a8342SChanwoo Choi static ssize_t cable_state_show(struct device *dev, 388f68a8342SChanwoo Choi struct device_attribute *attr, char *buf) 389f68a8342SChanwoo Choi { 390f68a8342SChanwoo Choi struct extcon_cable *cable = container_of(attr, struct extcon_cable, 391f68a8342SChanwoo Choi attr_state); 392f68a8342SChanwoo Choi 393be052cc8SRoger Quadros int i = cable->cable_index; 394be052cc8SRoger Quadros 395f68a8342SChanwoo Choi return sprintf(buf, "%d\n", 396575c2b86SChanwoo Choi extcon_get_state(cable->edev, cable->edev->supported_cable[i])); 397f68a8342SChanwoo Choi } 398f68a8342SChanwoo Choi 399f68a8342SChanwoo Choi /** 4006ab6094fSChanwoo Choi * extcon_sync() - Synchronize the state for an external connector. 4016ab6094fSChanwoo Choi * @edev: the extcon device 402f68a8342SChanwoo Choi * 4036ab6094fSChanwoo Choi * Note that this function send a notification in order to synchronize 4046ab6094fSChanwoo Choi * the state and property of an external connector. 4056ab6094fSChanwoo Choi * 4066ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 407f68a8342SChanwoo Choi */ 408ab11af04SChanwoo Choi int extcon_sync(struct extcon_dev *edev, unsigned int id) 409f68a8342SChanwoo Choi { 410f68a8342SChanwoo Choi char name_buf[120]; 411f68a8342SChanwoo Choi char state_buf[120]; 412f68a8342SChanwoo Choi char *prop_buf; 413f68a8342SChanwoo Choi char *envp[3]; 414f68a8342SChanwoo Choi int env_offset = 0; 415f68a8342SChanwoo Choi int length; 416046050f6SChanwoo Choi int index; 417ab11af04SChanwoo Choi int state; 418f68a8342SChanwoo Choi unsigned long flags; 419f68a8342SChanwoo Choi 4207eae43aeSChanwoo Choi if (!edev) 4217eae43aeSChanwoo Choi return -EINVAL; 4227eae43aeSChanwoo Choi 423ab11af04SChanwoo Choi index = find_cable_index_by_id(edev, id); 424ab11af04SChanwoo Choi if (index < 0) 425ab11af04SChanwoo Choi return index; 426ab11af04SChanwoo Choi 427f68a8342SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 428ab11af04SChanwoo Choi state = !!(edev->state & BIT(index)); 4298a9dbb77SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 430815429b3SChanwoo Choi 431815429b3SChanwoo Choi /* 432815429b3SChanwoo Choi * Call functions in a raw notifier chain for the specific one 433815429b3SChanwoo Choi * external connector. 434815429b3SChanwoo Choi */ 435ab11af04SChanwoo Choi raw_notifier_call_chain(&edev->nh[index], state, edev); 436f7a89811SRoger Quadros 437815429b3SChanwoo Choi /* 438815429b3SChanwoo Choi * Call functions in a raw notifier chain for the all supported 439815429b3SChanwoo Choi * external connectors. 440815429b3SChanwoo Choi */ 441815429b3SChanwoo Choi raw_notifier_call_chain(&edev->nh_all, state, edev); 442815429b3SChanwoo Choi 4438a9dbb77SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 444f68a8342SChanwoo Choi /* This could be in interrupt handler */ 445f68a8342SChanwoo Choi prop_buf = (char *)get_zeroed_page(GFP_ATOMIC); 446ab11af04SChanwoo Choi if (!prop_buf) { 447f68a8342SChanwoo Choi /* Unlock early before uevent */ 448f68a8342SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 449f68a8342SChanwoo Choi 450f68a8342SChanwoo Choi dev_err(&edev->dev, "out of memory in extcon_set_state\n"); 451f68a8342SChanwoo Choi kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE); 452f68a8342SChanwoo Choi 453e7d9dd5aSPan Bian return -ENOMEM; 454f68a8342SChanwoo Choi } 455f68a8342SChanwoo Choi 456ab11af04SChanwoo Choi length = name_show(&edev->dev, NULL, prop_buf); 457ab11af04SChanwoo Choi if (length > 0) { 458ab11af04SChanwoo Choi if (prop_buf[length - 1] == '\n') 459ab11af04SChanwoo Choi prop_buf[length - 1] = 0; 460ab11af04SChanwoo Choi snprintf(name_buf, sizeof(name_buf), "NAME=%s", prop_buf); 461ab11af04SChanwoo Choi envp[env_offset++] = name_buf; 462ab11af04SChanwoo Choi } 463ab11af04SChanwoo Choi 464ab11af04SChanwoo Choi length = state_show(&edev->dev, NULL, prop_buf); 465ab11af04SChanwoo Choi if (length > 0) { 466ab11af04SChanwoo Choi if (prop_buf[length - 1] == '\n') 467ab11af04SChanwoo Choi prop_buf[length - 1] = 0; 468ab11af04SChanwoo Choi snprintf(state_buf, sizeof(state_buf), "STATE=%s", prop_buf); 469ab11af04SChanwoo Choi envp[env_offset++] = state_buf; 470ab11af04SChanwoo Choi } 471ab11af04SChanwoo Choi envp[env_offset] = NULL; 472ab11af04SChanwoo Choi 473ab11af04SChanwoo Choi /* Unlock early before uevent */ 474ab11af04SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 475ab11af04SChanwoo Choi kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp); 476ab11af04SChanwoo Choi free_page((unsigned long)prop_buf); 477ab11af04SChanwoo Choi 478ab11af04SChanwoo Choi return 0; 479ab11af04SChanwoo Choi } 480ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_sync); 481ab11af04SChanwoo Choi 482f68a8342SChanwoo Choi /** 4836ab6094fSChanwoo Choi * extcon_get_state() - Get the state of an external connector. 4846ab6094fSChanwoo Choi * @edev: the extcon device 4856ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 4866ab6094fSChanwoo Choi * 4876ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 488f68a8342SChanwoo Choi */ 489575c2b86SChanwoo Choi int extcon_get_state(struct extcon_dev *edev, const unsigned int id) 490f68a8342SChanwoo Choi { 491575c2b86SChanwoo Choi int index, state; 492575c2b86SChanwoo Choi unsigned long flags; 4932a9de9c0SChanwoo Choi 4947eae43aeSChanwoo Choi if (!edev) 4957eae43aeSChanwoo Choi return -EINVAL; 4967eae43aeSChanwoo Choi 4972a9de9c0SChanwoo Choi index = find_cable_index_by_id(edev, id); 4982a9de9c0SChanwoo Choi if (index < 0) 4992a9de9c0SChanwoo Choi return index; 5002a9de9c0SChanwoo Choi 501575c2b86SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 502575c2b86SChanwoo Choi state = is_extcon_attached(edev, index); 503575c2b86SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 504f68a8342SChanwoo Choi 505575c2b86SChanwoo Choi return state; 506f68a8342SChanwoo Choi } 507575c2b86SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_state); 508f68a8342SChanwoo Choi 509f68a8342SChanwoo Choi /** 5106ab6094fSChanwoo Choi * extcon_set_state() - Set the state of an external connector. 5116ab6094fSChanwoo Choi * @edev: the extcon device 5126ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 5136ab6094fSChanwoo Choi * @state: the new state of an external connector. 5146ab6094fSChanwoo Choi * the default semantics is true: attached / false: detached. 515ab11af04SChanwoo Choi * 5166ab6094fSChanwoo Choi * Note that this function set the state of an external connector without 5176ab6094fSChanwoo Choi * a notification. To synchronize the state of an external connector, 5186ab6094fSChanwoo Choi * have to use extcon_set_state_sync() and extcon_sync(). 5196ab6094fSChanwoo Choi * 5206ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 521f68a8342SChanwoo Choi */ 5226ab6094fSChanwoo Choi int extcon_set_state(struct extcon_dev *edev, unsigned int id, bool state) 523f68a8342SChanwoo Choi { 524ab11af04SChanwoo Choi unsigned long flags; 525ab11af04SChanwoo Choi int index, ret = 0; 526f68a8342SChanwoo Choi 5277eae43aeSChanwoo Choi if (!edev) 5287eae43aeSChanwoo Choi return -EINVAL; 5297eae43aeSChanwoo Choi 5302a9de9c0SChanwoo Choi index = find_cable_index_by_id(edev, id); 5312a9de9c0SChanwoo Choi if (index < 0) 5322a9de9c0SChanwoo Choi return index; 5332a9de9c0SChanwoo Choi 534ab11af04SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 535ab11af04SChanwoo Choi 536ab11af04SChanwoo Choi /* Check whether the external connector's state is changed. */ 5376ab6094fSChanwoo Choi if (!is_extcon_changed(edev, index, state)) 538ab11af04SChanwoo Choi goto out; 539ab11af04SChanwoo Choi 540ab11af04SChanwoo Choi if (check_mutually_exclusive(edev, 5416ab6094fSChanwoo Choi (edev->state & ~BIT(index)) | (state & BIT(index)))) { 542ab11af04SChanwoo Choi ret = -EPERM; 543ab11af04SChanwoo Choi goto out; 544ab11af04SChanwoo Choi } 545ab11af04SChanwoo Choi 546792e7e9eSChanwoo Choi /* 547792e7e9eSChanwoo Choi * Initialize the value of extcon property before setting 548792e7e9eSChanwoo Choi * the detached state for an external connector. 549792e7e9eSChanwoo Choi */ 5506ab6094fSChanwoo Choi if (!state) 551792e7e9eSChanwoo Choi init_property(edev, id, index); 552792e7e9eSChanwoo Choi 5536ab6094fSChanwoo Choi /* Update the state for an external connector. */ 5546ab6094fSChanwoo Choi if (state) 555ab11af04SChanwoo Choi edev->state |= BIT(index); 556ab11af04SChanwoo Choi else 557ab11af04SChanwoo Choi edev->state &= ~(BIT(index)); 558ab11af04SChanwoo Choi out: 559ab11af04SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 560ab11af04SChanwoo Choi 561ab11af04SChanwoo Choi return ret; 562f68a8342SChanwoo Choi } 563575c2b86SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_state); 564f68a8342SChanwoo Choi 565f68a8342SChanwoo Choi /** 5666ab6094fSChanwoo Choi * extcon_set_state_sync() - Set the state of an external connector with sync. 5676ab6094fSChanwoo Choi * @edev: the extcon device 5686ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 5696ab6094fSChanwoo Choi * @state: the new state of external connector. 5706ab6094fSChanwoo Choi * the default semantics is true: attached / false: detached. 571ab11af04SChanwoo Choi * 5726ab6094fSChanwoo Choi * Note that this function set the state of external connector 5736ab6094fSChanwoo Choi * and synchronize the state by sending a notification. 5746ab6094fSChanwoo Choi * 5756ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 576ab11af04SChanwoo Choi */ 5776ab6094fSChanwoo Choi int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state) 578ab11af04SChanwoo Choi { 579*2da3db7fSAlexander Stein int ret; 580ab11af04SChanwoo Choi 5816ab6094fSChanwoo Choi ret = extcon_set_state(edev, id, state); 582ab11af04SChanwoo Choi if (ret < 0) 583ab11af04SChanwoo Choi return ret; 584ab11af04SChanwoo Choi 585ab11af04SChanwoo Choi return extcon_sync(edev, id); 586ab11af04SChanwoo Choi } 587ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_state_sync); 588ab11af04SChanwoo Choi 589ab11af04SChanwoo Choi /** 5906ab6094fSChanwoo Choi * extcon_get_property() - Get the property value of an external connector. 5916ab6094fSChanwoo Choi * @edev: the extcon device 5926ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 5936ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 5946ab6094fSChanwoo Choi * @prop_val: the pointer which store the value of extcon property 595792e7e9eSChanwoo Choi * 5966ab6094fSChanwoo Choi * Note that when getting the property value of external connector, 5976ab6094fSChanwoo Choi * the external connector should be attached. If detached state, function 5986ab6094fSChanwoo Choi * return 0 without property value. Also, the each property should be 5996ab6094fSChanwoo Choi * included in the list of supported properties according to extcon type. 600792e7e9eSChanwoo Choi * 6016ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 602792e7e9eSChanwoo Choi */ 603792e7e9eSChanwoo Choi int extcon_get_property(struct extcon_dev *edev, unsigned int id, 604792e7e9eSChanwoo Choi unsigned int prop, 605792e7e9eSChanwoo Choi union extcon_property_value *prop_val) 606792e7e9eSChanwoo Choi { 607792e7e9eSChanwoo Choi struct extcon_cable *cable; 608792e7e9eSChanwoo Choi unsigned long flags; 609792e7e9eSChanwoo Choi int index, ret = 0; 610792e7e9eSChanwoo Choi 611cff7499dSAndy Shevchenko *prop_val = (union extcon_property_value){0}; 612792e7e9eSChanwoo Choi 613792e7e9eSChanwoo Choi if (!edev) 614792e7e9eSChanwoo Choi return -EINVAL; 615792e7e9eSChanwoo Choi 616792e7e9eSChanwoo Choi /* Check whether the property is supported or not */ 617792e7e9eSChanwoo Choi if (!is_extcon_property_supported(id, prop)) 618792e7e9eSChanwoo Choi return -EINVAL; 619792e7e9eSChanwoo Choi 620792e7e9eSChanwoo Choi /* Find the cable index of external connector by using id */ 621792e7e9eSChanwoo Choi index = find_cable_index_by_id(edev, id); 622792e7e9eSChanwoo Choi if (index < 0) 623792e7e9eSChanwoo Choi return index; 624792e7e9eSChanwoo Choi 625792e7e9eSChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 626792e7e9eSChanwoo Choi 6277f2a0a16SChanwoo Choi /* Check whether the property is available or not. */ 6287f2a0a16SChanwoo Choi if (!is_extcon_property_capability(edev, id, index, prop)) { 6297f2a0a16SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 6307f2a0a16SChanwoo Choi return -EPERM; 6317f2a0a16SChanwoo Choi } 6327f2a0a16SChanwoo Choi 633792e7e9eSChanwoo Choi /* 634792e7e9eSChanwoo Choi * Check whether the external connector is attached. 635792e7e9eSChanwoo Choi * If external connector is detached, the user can not 636792e7e9eSChanwoo Choi * get the property value. 637792e7e9eSChanwoo Choi */ 638792e7e9eSChanwoo Choi if (!is_extcon_attached(edev, index)) { 639792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 640792e7e9eSChanwoo Choi return 0; 641792e7e9eSChanwoo Choi } 642792e7e9eSChanwoo Choi 643792e7e9eSChanwoo Choi cable = &edev->cables[index]; 644792e7e9eSChanwoo Choi 645792e7e9eSChanwoo Choi /* Get the property value according to extcon type */ 646792e7e9eSChanwoo Choi switch (prop) { 647792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 648792e7e9eSChanwoo Choi *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN]; 649792e7e9eSChanwoo Choi break; 650792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 651792e7e9eSChanwoo Choi *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN]; 652792e7e9eSChanwoo Choi break; 653792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 654792e7e9eSChanwoo Choi *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN]; 655792e7e9eSChanwoo Choi break; 656792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 657792e7e9eSChanwoo Choi *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN]; 658792e7e9eSChanwoo Choi break; 659792e7e9eSChanwoo Choi default: 660792e7e9eSChanwoo Choi ret = -EINVAL; 661792e7e9eSChanwoo Choi break; 662792e7e9eSChanwoo Choi } 663792e7e9eSChanwoo Choi 664792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 665792e7e9eSChanwoo Choi 666792e7e9eSChanwoo Choi return ret; 667792e7e9eSChanwoo Choi } 668792e7e9eSChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_property); 669792e7e9eSChanwoo Choi 670792e7e9eSChanwoo Choi /** 6716ab6094fSChanwoo Choi * extcon_set_property() - Set the property value of an external connector. 6726ab6094fSChanwoo Choi * @edev: the extcon device 6736ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 6746ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 6756ab6094fSChanwoo Choi * @prop_val: the pointer including the new value of extcon property 676792e7e9eSChanwoo Choi * 6776ab6094fSChanwoo Choi * Note that each property should be included in the list of supported 6786ab6094fSChanwoo Choi * properties according to the extcon type. 679792e7e9eSChanwoo Choi * 6806ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 681792e7e9eSChanwoo Choi */ 682792e7e9eSChanwoo Choi int extcon_set_property(struct extcon_dev *edev, unsigned int id, 683792e7e9eSChanwoo Choi unsigned int prop, 684792e7e9eSChanwoo Choi union extcon_property_value prop_val) 685792e7e9eSChanwoo Choi { 686792e7e9eSChanwoo Choi struct extcon_cable *cable; 687792e7e9eSChanwoo Choi unsigned long flags; 688792e7e9eSChanwoo Choi int index, ret = 0; 689792e7e9eSChanwoo Choi 690792e7e9eSChanwoo Choi if (!edev) 691792e7e9eSChanwoo Choi return -EINVAL; 692792e7e9eSChanwoo Choi 693792e7e9eSChanwoo Choi /* Check whether the property is supported or not */ 694792e7e9eSChanwoo Choi if (!is_extcon_property_supported(id, prop)) 695792e7e9eSChanwoo Choi return -EINVAL; 696792e7e9eSChanwoo Choi 697792e7e9eSChanwoo Choi /* Find the cable index of external connector by using id */ 698792e7e9eSChanwoo Choi index = find_cable_index_by_id(edev, id); 699792e7e9eSChanwoo Choi if (index < 0) 700792e7e9eSChanwoo Choi return index; 701792e7e9eSChanwoo Choi 702792e7e9eSChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 703792e7e9eSChanwoo Choi 7047f2a0a16SChanwoo Choi /* Check whether the property is available or not. */ 7057f2a0a16SChanwoo Choi if (!is_extcon_property_capability(edev, id, index, prop)) { 7067f2a0a16SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 7077f2a0a16SChanwoo Choi return -EPERM; 7087f2a0a16SChanwoo Choi } 7097f2a0a16SChanwoo Choi 710792e7e9eSChanwoo Choi cable = &edev->cables[index]; 711792e7e9eSChanwoo Choi 712792e7e9eSChanwoo Choi /* Set the property value according to extcon type */ 713792e7e9eSChanwoo Choi switch (prop) { 714792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 715792e7e9eSChanwoo Choi cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val; 716792e7e9eSChanwoo Choi break; 717792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 718792e7e9eSChanwoo Choi cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val; 719792e7e9eSChanwoo Choi break; 720792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 721792e7e9eSChanwoo Choi cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val; 722792e7e9eSChanwoo Choi break; 723792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 724792e7e9eSChanwoo Choi cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val; 725792e7e9eSChanwoo Choi break; 726792e7e9eSChanwoo Choi default: 727792e7e9eSChanwoo Choi ret = -EINVAL; 728792e7e9eSChanwoo Choi break; 729792e7e9eSChanwoo Choi } 730792e7e9eSChanwoo Choi 731792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 732792e7e9eSChanwoo Choi 733792e7e9eSChanwoo Choi return ret; 734792e7e9eSChanwoo Choi } 735792e7e9eSChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property); 736792e7e9eSChanwoo Choi 737792e7e9eSChanwoo Choi /** 7386ab6094fSChanwoo Choi * extcon_set_property_sync() - Set property of an external connector with sync. 7396ab6094fSChanwoo Choi * @prop_val: the pointer including the new value of extcon property 740ab11af04SChanwoo Choi * 7416ab6094fSChanwoo Choi * Note that when setting the property value of external connector, 7426ab6094fSChanwoo Choi * the external connector should be attached. The each property should 7436ab6094fSChanwoo Choi * be included in the list of supported properties according to extcon type. 744ab11af04SChanwoo Choi * 7456ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 746ab11af04SChanwoo Choi */ 747ab11af04SChanwoo Choi int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, 748ab11af04SChanwoo Choi unsigned int prop, 749ab11af04SChanwoo Choi union extcon_property_value prop_val) 750ab11af04SChanwoo Choi { 751ab11af04SChanwoo Choi int ret; 752ab11af04SChanwoo Choi 753ab11af04SChanwoo Choi ret = extcon_set_property(edev, id, prop, prop_val); 754ab11af04SChanwoo Choi if (ret < 0) 755ab11af04SChanwoo Choi return ret; 756ab11af04SChanwoo Choi 757ab11af04SChanwoo Choi return extcon_sync(edev, id); 758ab11af04SChanwoo Choi } 759ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property_sync); 760ab11af04SChanwoo Choi 761ab11af04SChanwoo Choi /** 7626ab6094fSChanwoo Choi * extcon_get_property_capability() - Get the capability of the property 7636ab6094fSChanwoo Choi * for an external connector. 7646ab6094fSChanwoo Choi * @edev: the extcon device 7656ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 7666ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 7677f2a0a16SChanwoo Choi * 7687f2a0a16SChanwoo Choi * Returns 1 if the property is available or 0 if not available. 7697f2a0a16SChanwoo Choi */ 7707f2a0a16SChanwoo Choi int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, 7717f2a0a16SChanwoo Choi unsigned int prop) 7727f2a0a16SChanwoo Choi { 7737f2a0a16SChanwoo Choi int index; 7747f2a0a16SChanwoo Choi 7757f2a0a16SChanwoo Choi if (!edev) 7767f2a0a16SChanwoo Choi return -EINVAL; 7777f2a0a16SChanwoo Choi 7787f2a0a16SChanwoo Choi /* Check whether the property is supported or not */ 7797f2a0a16SChanwoo Choi if (!is_extcon_property_supported(id, prop)) 7807f2a0a16SChanwoo Choi return -EINVAL; 7817f2a0a16SChanwoo Choi 7827f2a0a16SChanwoo Choi /* Find the cable index of external connector by using id */ 7837f2a0a16SChanwoo Choi index = find_cable_index_by_id(edev, id); 7847f2a0a16SChanwoo Choi if (index < 0) 7857f2a0a16SChanwoo Choi return index; 7867f2a0a16SChanwoo Choi 7877f2a0a16SChanwoo Choi return is_extcon_property_capability(edev, id, index, prop); 7887f2a0a16SChanwoo Choi } 7897f2a0a16SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_property_capability); 7907f2a0a16SChanwoo Choi 7917f2a0a16SChanwoo Choi /** 7926ab6094fSChanwoo Choi * extcon_set_property_capability() - Set the capability of the property 7936ab6094fSChanwoo Choi * for an external connector. 7946ab6094fSChanwoo Choi * @edev: the extcon device 7956ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 7966ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 7977f2a0a16SChanwoo Choi * 7986ab6094fSChanwoo Choi * Note that this function set the capability of the property 7996ab6094fSChanwoo Choi * for an external connector in order to mark the bit in capability 8006ab6094fSChanwoo Choi * bitmap which mean the available state of the property. 8017f2a0a16SChanwoo Choi * 8026ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 8037f2a0a16SChanwoo Choi */ 8047f2a0a16SChanwoo Choi int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id, 8057f2a0a16SChanwoo Choi unsigned int prop) 8067f2a0a16SChanwoo Choi { 8077f2a0a16SChanwoo Choi struct extcon_cable *cable; 8087f2a0a16SChanwoo Choi int index, type, ret = 0; 8097f2a0a16SChanwoo Choi 8107f2a0a16SChanwoo Choi if (!edev) 8117f2a0a16SChanwoo Choi return -EINVAL; 8127f2a0a16SChanwoo Choi 8137f2a0a16SChanwoo Choi /* Check whether the property is supported or not. */ 8147f2a0a16SChanwoo Choi if (!is_extcon_property_supported(id, prop)) 8157f2a0a16SChanwoo Choi return -EINVAL; 8167f2a0a16SChanwoo Choi 8177f2a0a16SChanwoo Choi /* Find the cable index of external connector by using id. */ 8187f2a0a16SChanwoo Choi index = find_cable_index_by_id(edev, id); 8197f2a0a16SChanwoo Choi if (index < 0) 8207f2a0a16SChanwoo Choi return index; 8217f2a0a16SChanwoo Choi 8227f2a0a16SChanwoo Choi type = get_extcon_type(prop); 8237f2a0a16SChanwoo Choi if (type < 0) 8247f2a0a16SChanwoo Choi return type; 8257f2a0a16SChanwoo Choi 8267f2a0a16SChanwoo Choi cable = &edev->cables[index]; 8277f2a0a16SChanwoo Choi 8287f2a0a16SChanwoo Choi switch (type) { 8297f2a0a16SChanwoo Choi case EXTCON_TYPE_USB: 8307f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); 8317f2a0a16SChanwoo Choi break; 8327f2a0a16SChanwoo Choi case EXTCON_TYPE_CHG: 8337f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); 8347f2a0a16SChanwoo Choi break; 8357f2a0a16SChanwoo Choi case EXTCON_TYPE_JACK: 8367f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); 8377f2a0a16SChanwoo Choi break; 8387f2a0a16SChanwoo Choi case EXTCON_TYPE_DISP: 8397f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); 8407f2a0a16SChanwoo Choi break; 8417f2a0a16SChanwoo Choi default: 8427f2a0a16SChanwoo Choi ret = -EINVAL; 8437f2a0a16SChanwoo Choi } 8447f2a0a16SChanwoo Choi 8457f2a0a16SChanwoo Choi return ret; 8467f2a0a16SChanwoo Choi } 8477f2a0a16SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property_capability); 8487f2a0a16SChanwoo Choi 8497f2a0a16SChanwoo Choi /** 8506ab6094fSChanwoo Choi * extcon_get_extcon_dev() - Get the extcon device instance from the name. 8516ab6094fSChanwoo Choi * @extcon_name: the extcon name provided with extcon_dev_register() 8526ab6094fSChanwoo Choi * 8536ab6094fSChanwoo Choi * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 854f68a8342SChanwoo Choi */ 855f68a8342SChanwoo Choi struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) 856f68a8342SChanwoo Choi { 857f68a8342SChanwoo Choi struct extcon_dev *sd; 858f68a8342SChanwoo Choi 8597eae43aeSChanwoo Choi if (!extcon_name) 8607eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 8617eae43aeSChanwoo Choi 862f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 863f68a8342SChanwoo Choi list_for_each_entry(sd, &extcon_dev_list, entry) { 864f68a8342SChanwoo Choi if (!strcmp(sd->name, extcon_name)) 865f68a8342SChanwoo Choi goto out; 866f68a8342SChanwoo Choi } 867f68a8342SChanwoo Choi sd = NULL; 868f68a8342SChanwoo Choi out: 869f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 870f68a8342SChanwoo Choi return sd; 871f68a8342SChanwoo Choi } 872f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); 873f68a8342SChanwoo Choi 874f68a8342SChanwoo Choi /** 8756ab6094fSChanwoo Choi * extcon_register_notifier() - Register a notifier block to get notified by 8766ab6094fSChanwoo Choi * any state changes from the extcon. 8776ab6094fSChanwoo Choi * @edev: the extcon device 8786ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 8796ab6094fSChanwoo Choi * @nb: a notifier block to be registered 880f68a8342SChanwoo Choi * 881f68a8342SChanwoo Choi * Note that the second parameter given to the callback of nb (val) is 8826ab6094fSChanwoo Choi * the current state of an external connector and the third pameter 8836ab6094fSChanwoo Choi * is the pointer of extcon device. 8846ab6094fSChanwoo Choi * 8856ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 886f68a8342SChanwoo Choi */ 88773b6ecdbSChanwoo Choi int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, 888f68a8342SChanwoo Choi struct notifier_block *nb) 889f68a8342SChanwoo Choi { 89066bee35fSHans de Goede unsigned long flags; 8911fa80f18SColin Ian King int ret, idx; 892046050f6SChanwoo Choi 89301b4c9a1SChanwoo Choi if (!edev || !nb) 8947eae43aeSChanwoo Choi return -EINVAL; 8957eae43aeSChanwoo Choi 896046050f6SChanwoo Choi idx = find_cable_index_by_id(edev, id); 897a05f44c8SStephen Boyd if (idx < 0) 898a05f44c8SStephen Boyd return idx; 89966bee35fSHans de Goede 90066bee35fSHans de Goede spin_lock_irqsave(&edev->lock, flags); 901046050f6SChanwoo Choi ret = raw_notifier_chain_register(&edev->nh[idx], nb); 90266bee35fSHans de Goede spin_unlock_irqrestore(&edev->lock, flags); 90366bee35fSHans de Goede 90466bee35fSHans de Goede return ret; 905f68a8342SChanwoo Choi } 906f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_register_notifier); 907f68a8342SChanwoo Choi 908f68a8342SChanwoo Choi /** 9096ab6094fSChanwoo Choi * extcon_unregister_notifier() - Unregister a notifier block from the extcon. 9106ab6094fSChanwoo Choi * @edev: the extcon device 9116ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 9126ab6094fSChanwoo Choi * @nb: a notifier block to be registered 9136ab6094fSChanwoo Choi * 9146ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 915f68a8342SChanwoo Choi */ 91673b6ecdbSChanwoo Choi int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, 917f68a8342SChanwoo Choi struct notifier_block *nb) 918f68a8342SChanwoo Choi { 91966bee35fSHans de Goede unsigned long flags; 920046050f6SChanwoo Choi int ret, idx; 921046050f6SChanwoo Choi 9227eae43aeSChanwoo Choi if (!edev || !nb) 9237eae43aeSChanwoo Choi return -EINVAL; 9247eae43aeSChanwoo Choi 925046050f6SChanwoo Choi idx = find_cable_index_by_id(edev, id); 926a05f44c8SStephen Boyd if (idx < 0) 927a05f44c8SStephen Boyd return idx; 92866bee35fSHans de Goede 92966bee35fSHans de Goede spin_lock_irqsave(&edev->lock, flags); 930046050f6SChanwoo Choi ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); 93166bee35fSHans de Goede spin_unlock_irqrestore(&edev->lock, flags); 93266bee35fSHans de Goede 93366bee35fSHans de Goede return ret; 934f68a8342SChanwoo Choi } 935f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_unregister_notifier); 936f68a8342SChanwoo Choi 937815429b3SChanwoo Choi /** 9386ab6094fSChanwoo Choi * extcon_register_notifier_all() - Register a notifier block for all connectors. 9396ab6094fSChanwoo Choi * @edev: the extcon device 9406ab6094fSChanwoo Choi * @nb: a notifier block to be registered 941815429b3SChanwoo Choi * 9426ab6094fSChanwoo Choi * Note that this function registers a notifier block in order to receive 9436ab6094fSChanwoo Choi * the state change of all supported external connectors from extcon device. 944826a47e9SMarkus Elfring * And the second parameter given to the callback of nb (val) is 9456ab6094fSChanwoo Choi * the current state and the third pameter is the pointer of extcon device. 946815429b3SChanwoo Choi * 9476ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 948815429b3SChanwoo Choi */ 949815429b3SChanwoo Choi int extcon_register_notifier_all(struct extcon_dev *edev, 950815429b3SChanwoo Choi struct notifier_block *nb) 951815429b3SChanwoo Choi { 952815429b3SChanwoo Choi unsigned long flags; 953815429b3SChanwoo Choi int ret; 954815429b3SChanwoo Choi 955815429b3SChanwoo Choi if (!edev || !nb) 956815429b3SChanwoo Choi return -EINVAL; 957815429b3SChanwoo Choi 958815429b3SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 959815429b3SChanwoo Choi ret = raw_notifier_chain_register(&edev->nh_all, nb); 960815429b3SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 961815429b3SChanwoo Choi 962815429b3SChanwoo Choi return ret; 963815429b3SChanwoo Choi } 964815429b3SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_register_notifier_all); 965815429b3SChanwoo Choi 966815429b3SChanwoo Choi /** 967815429b3SChanwoo Choi * extcon_unregister_notifier_all() - Unregister a notifier block from extcon. 9686ab6094fSChanwoo Choi * @edev: the extcon device 9696ab6094fSChanwoo Choi * @nb: a notifier block to be registered 970815429b3SChanwoo Choi * 9716ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 972815429b3SChanwoo Choi */ 973815429b3SChanwoo Choi int extcon_unregister_notifier_all(struct extcon_dev *edev, 974815429b3SChanwoo Choi struct notifier_block *nb) 975815429b3SChanwoo Choi { 976815429b3SChanwoo Choi unsigned long flags; 977815429b3SChanwoo Choi int ret; 978815429b3SChanwoo Choi 979815429b3SChanwoo Choi if (!edev || !nb) 980815429b3SChanwoo Choi return -EINVAL; 981815429b3SChanwoo Choi 982815429b3SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 983815429b3SChanwoo Choi ret = raw_notifier_chain_unregister(&edev->nh_all, nb); 984815429b3SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 985815429b3SChanwoo Choi 986815429b3SChanwoo Choi return ret; 987815429b3SChanwoo Choi } 988815429b3SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_unregister_notifier_all); 989815429b3SChanwoo Choi 990f68a8342SChanwoo Choi static struct attribute *extcon_attrs[] = { 991f68a8342SChanwoo Choi &dev_attr_state.attr, 992f68a8342SChanwoo Choi &dev_attr_name.attr, 993f68a8342SChanwoo Choi NULL, 994f68a8342SChanwoo Choi }; 995f68a8342SChanwoo Choi ATTRIBUTE_GROUPS(extcon); 996f68a8342SChanwoo Choi 997f68a8342SChanwoo Choi static int create_extcon_class(void) 998f68a8342SChanwoo Choi { 999f68a8342SChanwoo Choi if (!extcon_class) { 1000f68a8342SChanwoo Choi extcon_class = class_create(THIS_MODULE, "extcon"); 1001f68a8342SChanwoo Choi if (IS_ERR(extcon_class)) 1002f68a8342SChanwoo Choi return PTR_ERR(extcon_class); 1003f68a8342SChanwoo Choi extcon_class->dev_groups = extcon_groups; 1004f68a8342SChanwoo Choi } 1005f68a8342SChanwoo Choi 1006f68a8342SChanwoo Choi return 0; 1007f68a8342SChanwoo Choi } 1008f68a8342SChanwoo Choi 1009f68a8342SChanwoo Choi static void extcon_dev_release(struct device *dev) 1010f68a8342SChanwoo Choi { 1011f68a8342SChanwoo Choi } 1012f68a8342SChanwoo Choi 1013f68a8342SChanwoo Choi static const char *muex_name = "mutually_exclusive"; 1014f68a8342SChanwoo Choi static void dummy_sysfs_dev_release(struct device *dev) 1015f68a8342SChanwoo Choi { 1016f68a8342SChanwoo Choi } 1017f68a8342SChanwoo Choi 1018f68a8342SChanwoo Choi /* 1019f68a8342SChanwoo Choi * extcon_dev_allocate() - Allocate the memory of extcon device. 10206ab6094fSChanwoo Choi * @supported_cable: the array of the supported external connectors 10216ab6094fSChanwoo Choi * ending with EXTCON_NONE. 1022f68a8342SChanwoo Choi * 10236ab6094fSChanwoo Choi * Note that this function allocates the memory for extcon device 10246ab6094fSChanwoo Choi * and initialize default setting for the extcon device. 1025f68a8342SChanwoo Choi * 10266ab6094fSChanwoo Choi * Returns the pointer memory of allocated extcon_dev if success 10276ab6094fSChanwoo Choi * or ERR_PTR(err) if fail. 1028f68a8342SChanwoo Choi */ 102973b6ecdbSChanwoo Choi struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) 1030f68a8342SChanwoo Choi { 1031f68a8342SChanwoo Choi struct extcon_dev *edev; 1032f68a8342SChanwoo Choi 10337eae43aeSChanwoo Choi if (!supported_cable) 10347eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 10357eae43aeSChanwoo Choi 1036f68a8342SChanwoo Choi edev = kzalloc(sizeof(*edev), GFP_KERNEL); 1037f68a8342SChanwoo Choi if (!edev) 1038f68a8342SChanwoo Choi return ERR_PTR(-ENOMEM); 1039f68a8342SChanwoo Choi 1040f68a8342SChanwoo Choi edev->max_supported = 0; 1041f68a8342SChanwoo Choi edev->supported_cable = supported_cable; 1042f68a8342SChanwoo Choi 1043f68a8342SChanwoo Choi return edev; 1044f68a8342SChanwoo Choi } 1045f68a8342SChanwoo Choi 1046f68a8342SChanwoo Choi /* 1047f68a8342SChanwoo Choi * extcon_dev_free() - Free the memory of extcon device. 10486ab6094fSChanwoo Choi * @edev: the extcon device 1049f68a8342SChanwoo Choi */ 1050f68a8342SChanwoo Choi void extcon_dev_free(struct extcon_dev *edev) 1051f68a8342SChanwoo Choi { 1052f68a8342SChanwoo Choi kfree(edev); 1053f68a8342SChanwoo Choi } 1054f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_free); 1055f68a8342SChanwoo Choi 1056f68a8342SChanwoo Choi /** 10576ab6094fSChanwoo Choi * extcon_dev_register() - Register an new extcon device 10586ab6094fSChanwoo Choi * @edev: the extcon device to be registered 1059f68a8342SChanwoo Choi * 1060f68a8342SChanwoo Choi * Among the members of edev struct, please set the "user initializing data" 1061f68a8342SChanwoo Choi * do not set the values of "internal data", which are initialized by 1062f68a8342SChanwoo Choi * this function. 10636ab6094fSChanwoo Choi * 10646ab6094fSChanwoo Choi * Note that before calling this funciton, have to allocate the memory 10656ab6094fSChanwoo Choi * of an extcon device by using the extcon_dev_allocate(). And the extcon 10666ab6094fSChanwoo Choi * dev should include the supported_cable information. 10676ab6094fSChanwoo Choi * 10686ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 1069f68a8342SChanwoo Choi */ 1070f68a8342SChanwoo Choi int extcon_dev_register(struct extcon_dev *edev) 1071f68a8342SChanwoo Choi { 1072f68a8342SChanwoo Choi int ret, index = 0; 107371c3ffa5SChanwoo Choi static atomic_t edev_no = ATOMIC_INIT(-1); 1074f68a8342SChanwoo Choi 1075f68a8342SChanwoo Choi if (!extcon_class) { 1076f68a8342SChanwoo Choi ret = create_extcon_class(); 1077f68a8342SChanwoo Choi if (ret < 0) 1078f68a8342SChanwoo Choi return ret; 1079f68a8342SChanwoo Choi } 1080f68a8342SChanwoo Choi 10817eae43aeSChanwoo Choi if (!edev || !edev->supported_cable) 10822a9de9c0SChanwoo Choi return -EINVAL; 1083f68a8342SChanwoo Choi 10842a9de9c0SChanwoo Choi for (; edev->supported_cable[index] != EXTCON_NONE; index++); 10852a9de9c0SChanwoo Choi 10862a9de9c0SChanwoo Choi edev->max_supported = index; 1087f68a8342SChanwoo Choi if (index > SUPPORTED_CABLE_MAX) { 10882a9de9c0SChanwoo Choi dev_err(&edev->dev, 10892a9de9c0SChanwoo Choi "exceed the maximum number of supported cables\n"); 1090f68a8342SChanwoo Choi return -EINVAL; 1091f68a8342SChanwoo Choi } 1092f68a8342SChanwoo Choi 1093f68a8342SChanwoo Choi edev->dev.class = extcon_class; 1094f68a8342SChanwoo Choi edev->dev.release = extcon_dev_release; 1095f68a8342SChanwoo Choi 109671c3ffa5SChanwoo Choi edev->name = dev_name(edev->dev.parent); 1097f68a8342SChanwoo Choi if (IS_ERR_OR_NULL(edev->name)) { 1098f68a8342SChanwoo Choi dev_err(&edev->dev, 1099f68a8342SChanwoo Choi "extcon device name is null\n"); 1100f68a8342SChanwoo Choi return -EINVAL; 1101f68a8342SChanwoo Choi } 110271c3ffa5SChanwoo Choi dev_set_name(&edev->dev, "extcon%lu", 110371c3ffa5SChanwoo Choi (unsigned long)atomic_inc_return(&edev_no)); 1104f68a8342SChanwoo Choi 1105f68a8342SChanwoo Choi if (edev->max_supported) { 1106f68a8342SChanwoo Choi char *str; 1107f68a8342SChanwoo Choi struct extcon_cable *cable; 1108f68a8342SChanwoo Choi 11096396bb22SKees Cook edev->cables = kcalloc(edev->max_supported, 11106396bb22SKees Cook sizeof(struct extcon_cable), 11116396bb22SKees Cook GFP_KERNEL); 1112f68a8342SChanwoo Choi if (!edev->cables) { 1113f68a8342SChanwoo Choi ret = -ENOMEM; 1114f68a8342SChanwoo Choi goto err_sysfs_alloc; 1115f68a8342SChanwoo Choi } 1116f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) { 1117f68a8342SChanwoo Choi cable = &edev->cables[index]; 1118f68a8342SChanwoo Choi 111969f75a4fSAndy Shevchenko str = kasprintf(GFP_KERNEL, "cable.%d", index); 1120f68a8342SChanwoo Choi if (!str) { 1121f68a8342SChanwoo Choi for (index--; index >= 0; index--) { 1122f68a8342SChanwoo Choi cable = &edev->cables[index]; 1123f68a8342SChanwoo Choi kfree(cable->attr_g.name); 1124f68a8342SChanwoo Choi } 1125f68a8342SChanwoo Choi ret = -ENOMEM; 1126f68a8342SChanwoo Choi 1127f68a8342SChanwoo Choi goto err_alloc_cables; 1128f68a8342SChanwoo Choi } 1129f68a8342SChanwoo Choi 1130f68a8342SChanwoo Choi cable->edev = edev; 1131f68a8342SChanwoo Choi cable->cable_index = index; 1132f68a8342SChanwoo Choi cable->attrs[0] = &cable->attr_name.attr; 1133f68a8342SChanwoo Choi cable->attrs[1] = &cable->attr_state.attr; 1134f68a8342SChanwoo Choi cable->attrs[2] = NULL; 1135f68a8342SChanwoo Choi cable->attr_g.name = str; 1136f68a8342SChanwoo Choi cable->attr_g.attrs = cable->attrs; 1137f68a8342SChanwoo Choi 1138f68a8342SChanwoo Choi sysfs_attr_init(&cable->attr_name.attr); 1139f68a8342SChanwoo Choi cable->attr_name.attr.name = "name"; 1140f68a8342SChanwoo Choi cable->attr_name.attr.mode = 0444; 1141f68a8342SChanwoo Choi cable->attr_name.show = cable_name_show; 1142f68a8342SChanwoo Choi 1143f68a8342SChanwoo Choi sysfs_attr_init(&cable->attr_state.attr); 1144f68a8342SChanwoo Choi cable->attr_state.attr.name = "state"; 1145f68a8342SChanwoo Choi cable->attr_state.attr.mode = 0444; 1146f68a8342SChanwoo Choi cable->attr_state.show = cable_state_show; 1147f68a8342SChanwoo Choi } 1148f68a8342SChanwoo Choi } 1149f68a8342SChanwoo Choi 1150f68a8342SChanwoo Choi if (edev->max_supported && edev->mutually_exclusive) { 1151f68a8342SChanwoo Choi char *name; 1152f68a8342SChanwoo Choi 1153f68a8342SChanwoo Choi /* Count the size of mutually_exclusive array */ 1154f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) 1155f68a8342SChanwoo Choi ; 1156f68a8342SChanwoo Choi 11576396bb22SKees Cook edev->attrs_muex = kcalloc(index + 1, 11586396bb22SKees Cook sizeof(struct attribute *), 11596396bb22SKees Cook GFP_KERNEL); 1160f68a8342SChanwoo Choi if (!edev->attrs_muex) { 1161f68a8342SChanwoo Choi ret = -ENOMEM; 1162f68a8342SChanwoo Choi goto err_muex; 1163f68a8342SChanwoo Choi } 1164f68a8342SChanwoo Choi 11656396bb22SKees Cook edev->d_attrs_muex = kcalloc(index, 11666396bb22SKees Cook sizeof(struct device_attribute), 11676396bb22SKees Cook GFP_KERNEL); 1168f68a8342SChanwoo Choi if (!edev->d_attrs_muex) { 1169f68a8342SChanwoo Choi ret = -ENOMEM; 1170f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1171f68a8342SChanwoo Choi goto err_muex; 1172f68a8342SChanwoo Choi } 1173f68a8342SChanwoo Choi 1174f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) { 117569f75a4fSAndy Shevchenko name = kasprintf(GFP_KERNEL, "0x%x", 117669f75a4fSAndy Shevchenko edev->mutually_exclusive[index]); 1177f68a8342SChanwoo Choi if (!name) { 1178f68a8342SChanwoo Choi for (index--; index >= 0; index--) { 1179f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr. 1180f68a8342SChanwoo Choi name); 1181f68a8342SChanwoo Choi } 1182f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1183f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1184f68a8342SChanwoo Choi ret = -ENOMEM; 1185f68a8342SChanwoo Choi goto err_muex; 1186f68a8342SChanwoo Choi } 1187f68a8342SChanwoo Choi sysfs_attr_init(&edev->d_attrs_muex[index].attr); 1188f68a8342SChanwoo Choi edev->d_attrs_muex[index].attr.name = name; 1189f68a8342SChanwoo Choi edev->d_attrs_muex[index].attr.mode = 0000; 1190f68a8342SChanwoo Choi edev->attrs_muex[index] = &edev->d_attrs_muex[index] 1191f68a8342SChanwoo Choi .attr; 1192f68a8342SChanwoo Choi } 1193f68a8342SChanwoo Choi edev->attr_g_muex.name = muex_name; 1194f68a8342SChanwoo Choi edev->attr_g_muex.attrs = edev->attrs_muex; 1195f68a8342SChanwoo Choi 1196f68a8342SChanwoo Choi } 1197f68a8342SChanwoo Choi 1198f68a8342SChanwoo Choi if (edev->max_supported) { 1199f68a8342SChanwoo Choi edev->extcon_dev_type.groups = 12006396bb22SKees Cook kcalloc(edev->max_supported + 2, 12016396bb22SKees Cook sizeof(struct attribute_group *), 12026396bb22SKees Cook GFP_KERNEL); 1203f68a8342SChanwoo Choi if (!edev->extcon_dev_type.groups) { 1204f68a8342SChanwoo Choi ret = -ENOMEM; 1205f68a8342SChanwoo Choi goto err_alloc_groups; 1206f68a8342SChanwoo Choi } 1207f68a8342SChanwoo Choi 1208f68a8342SChanwoo Choi edev->extcon_dev_type.name = dev_name(&edev->dev); 1209f68a8342SChanwoo Choi edev->extcon_dev_type.release = dummy_sysfs_dev_release; 1210f68a8342SChanwoo Choi 1211f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1212f68a8342SChanwoo Choi edev->extcon_dev_type.groups[index] = 1213f68a8342SChanwoo Choi &edev->cables[index].attr_g; 1214f68a8342SChanwoo Choi if (edev->mutually_exclusive) 1215f68a8342SChanwoo Choi edev->extcon_dev_type.groups[index] = 1216f68a8342SChanwoo Choi &edev->attr_g_muex; 1217f68a8342SChanwoo Choi 1218f68a8342SChanwoo Choi edev->dev.type = &edev->extcon_dev_type; 1219f68a8342SChanwoo Choi } 1220f68a8342SChanwoo Choi 1221f68a8342SChanwoo Choi ret = device_register(&edev->dev); 1222f68a8342SChanwoo Choi if (ret) { 1223f68a8342SChanwoo Choi put_device(&edev->dev); 1224f68a8342SChanwoo Choi goto err_dev; 1225f68a8342SChanwoo Choi } 1226f68a8342SChanwoo Choi 1227f68a8342SChanwoo Choi spin_lock_init(&edev->lock); 12283f5071a8SMarkus Elfring edev->nh = devm_kcalloc(&edev->dev, edev->max_supported, 12293f5071a8SMarkus Elfring sizeof(*edev->nh), GFP_KERNEL); 1230046050f6SChanwoo Choi if (!edev->nh) { 1231046050f6SChanwoo Choi ret = -ENOMEM; 1232d3bdd1c3SDinghao Liu device_unregister(&edev->dev); 1233046050f6SChanwoo Choi goto err_dev; 1234046050f6SChanwoo Choi } 1235046050f6SChanwoo Choi 1236046050f6SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1237046050f6SChanwoo Choi RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); 1238f68a8342SChanwoo Choi 1239815429b3SChanwoo Choi RAW_INIT_NOTIFIER_HEAD(&edev->nh_all); 1240815429b3SChanwoo Choi 1241f68a8342SChanwoo Choi dev_set_drvdata(&edev->dev, edev); 1242f68a8342SChanwoo Choi edev->state = 0; 1243f68a8342SChanwoo Choi 1244f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 1245f68a8342SChanwoo Choi list_add(&edev->entry, &extcon_dev_list); 1246f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 1247f68a8342SChanwoo Choi 1248f68a8342SChanwoo Choi return 0; 1249f68a8342SChanwoo Choi 1250f68a8342SChanwoo Choi err_dev: 1251f68a8342SChanwoo Choi if (edev->max_supported) 1252f68a8342SChanwoo Choi kfree(edev->extcon_dev_type.groups); 1253f68a8342SChanwoo Choi err_alloc_groups: 1254f68a8342SChanwoo Choi if (edev->max_supported && edev->mutually_exclusive) { 1255f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) 1256f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr.name); 1257f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1258f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1259f68a8342SChanwoo Choi } 1260f68a8342SChanwoo Choi err_muex: 1261f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1262f68a8342SChanwoo Choi kfree(edev->cables[index].attr_g.name); 1263f68a8342SChanwoo Choi err_alloc_cables: 1264f68a8342SChanwoo Choi if (edev->max_supported) 1265f68a8342SChanwoo Choi kfree(edev->cables); 1266f68a8342SChanwoo Choi err_sysfs_alloc: 1267f68a8342SChanwoo Choi return ret; 1268f68a8342SChanwoo Choi } 1269f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_register); 1270f68a8342SChanwoo Choi 1271f68a8342SChanwoo Choi /** 1272f68a8342SChanwoo Choi * extcon_dev_unregister() - Unregister the extcon device. 12736ab6094fSChanwoo Choi * @edev: the extcon device to be unregistered. 1274f68a8342SChanwoo Choi * 1275f68a8342SChanwoo Choi * Note that this does not call kfree(edev) because edev was not allocated 1276f68a8342SChanwoo Choi * by this class. 1277f68a8342SChanwoo Choi */ 1278f68a8342SChanwoo Choi void extcon_dev_unregister(struct extcon_dev *edev) 1279f68a8342SChanwoo Choi { 1280f68a8342SChanwoo Choi int index; 1281f68a8342SChanwoo Choi 12827eae43aeSChanwoo Choi if (!edev) 12837eae43aeSChanwoo Choi return; 12847eae43aeSChanwoo Choi 1285f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 1286f68a8342SChanwoo Choi list_del(&edev->entry); 1287f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 1288f68a8342SChanwoo Choi 1289f68a8342SChanwoo Choi if (IS_ERR_OR_NULL(get_device(&edev->dev))) { 1290f68a8342SChanwoo Choi dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", 1291f68a8342SChanwoo Choi dev_name(&edev->dev)); 1292f68a8342SChanwoo Choi return; 1293f68a8342SChanwoo Choi } 1294f68a8342SChanwoo Choi 1295f68a8342SChanwoo Choi device_unregister(&edev->dev); 1296f68a8342SChanwoo Choi 1297f68a8342SChanwoo Choi if (edev->mutually_exclusive && edev->max_supported) { 1298f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; 1299f68a8342SChanwoo Choi index++) 1300f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr.name); 1301f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1302f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1303f68a8342SChanwoo Choi } 1304f68a8342SChanwoo Choi 1305f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1306f68a8342SChanwoo Choi kfree(edev->cables[index].attr_g.name); 1307f68a8342SChanwoo Choi 1308f68a8342SChanwoo Choi if (edev->max_supported) { 1309f68a8342SChanwoo Choi kfree(edev->extcon_dev_type.groups); 1310f68a8342SChanwoo Choi kfree(edev->cables); 1311f68a8342SChanwoo Choi } 1312f68a8342SChanwoo Choi 1313f68a8342SChanwoo Choi put_device(&edev->dev); 1314f68a8342SChanwoo Choi } 1315f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_unregister); 1316f68a8342SChanwoo Choi 1317f68a8342SChanwoo Choi #ifdef CONFIG_OF 1318370ed7a9SAndrzej Hajda 1319370ed7a9SAndrzej Hajda /* 1320370ed7a9SAndrzej Hajda * extcon_find_edev_by_node - Find the extcon device from devicetree. 1321370ed7a9SAndrzej Hajda * @node : OF node identifying edev 1322370ed7a9SAndrzej Hajda * 1323370ed7a9SAndrzej Hajda * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1324370ed7a9SAndrzej Hajda */ 1325370ed7a9SAndrzej Hajda struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1326370ed7a9SAndrzej Hajda { 1327370ed7a9SAndrzej Hajda struct extcon_dev *edev; 1328370ed7a9SAndrzej Hajda 1329370ed7a9SAndrzej Hajda mutex_lock(&extcon_dev_list_lock); 1330370ed7a9SAndrzej Hajda list_for_each_entry(edev, &extcon_dev_list, entry) 1331370ed7a9SAndrzej Hajda if (edev->dev.parent && edev->dev.parent->of_node == node) 1332370ed7a9SAndrzej Hajda goto out; 1333370ed7a9SAndrzej Hajda edev = ERR_PTR(-EPROBE_DEFER); 1334370ed7a9SAndrzej Hajda out: 1335370ed7a9SAndrzej Hajda mutex_unlock(&extcon_dev_list_lock); 1336370ed7a9SAndrzej Hajda 1337370ed7a9SAndrzej Hajda return edev; 1338370ed7a9SAndrzej Hajda } 1339370ed7a9SAndrzej Hajda 1340f68a8342SChanwoo Choi /* 13416ab6094fSChanwoo Choi * extcon_get_edev_by_phandle - Get the extcon device from devicetree. 13426ab6094fSChanwoo Choi * @dev : the instance to the given device 13436ab6094fSChanwoo Choi * @index : the index into list of extcon_dev 1344f68a8342SChanwoo Choi * 13456ab6094fSChanwoo Choi * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1346f68a8342SChanwoo Choi */ 1347f68a8342SChanwoo Choi struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1348f68a8342SChanwoo Choi { 1349f68a8342SChanwoo Choi struct device_node *node; 1350f68a8342SChanwoo Choi struct extcon_dev *edev; 1351f68a8342SChanwoo Choi 13527eae43aeSChanwoo Choi if (!dev) 13537eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 13547eae43aeSChanwoo Choi 1355f68a8342SChanwoo Choi if (!dev->of_node) { 1356e8752b7aSStephen Boyd dev_dbg(dev, "device does not have a device node entry\n"); 1357f68a8342SChanwoo Choi return ERR_PTR(-EINVAL); 1358f68a8342SChanwoo Choi } 1359f68a8342SChanwoo Choi 1360f68a8342SChanwoo Choi node = of_parse_phandle(dev->of_node, "extcon", index); 1361f68a8342SChanwoo Choi if (!node) { 13625c27036dSRob Herring dev_dbg(dev, "failed to get phandle in %pOF node\n", 13635c27036dSRob Herring dev->of_node); 1364f68a8342SChanwoo Choi return ERR_PTR(-ENODEV); 1365f68a8342SChanwoo Choi } 1366f68a8342SChanwoo Choi 1367370ed7a9SAndrzej Hajda edev = extcon_find_edev_by_node(node); 13685d5c4c13SPeter Chen of_node_put(node); 1369f68a8342SChanwoo Choi 1370370ed7a9SAndrzej Hajda return edev; 1371f68a8342SChanwoo Choi } 1372370ed7a9SAndrzej Hajda 1373f68a8342SChanwoo Choi #else 1374370ed7a9SAndrzej Hajda 1375370ed7a9SAndrzej Hajda struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1376370ed7a9SAndrzej Hajda { 1377370ed7a9SAndrzej Hajda return ERR_PTR(-ENOSYS); 1378370ed7a9SAndrzej Hajda } 1379370ed7a9SAndrzej Hajda 1380f68a8342SChanwoo Choi struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1381f68a8342SChanwoo Choi { 1382f68a8342SChanwoo Choi return ERR_PTR(-ENOSYS); 1383f68a8342SChanwoo Choi } 1384370ed7a9SAndrzej Hajda 1385f68a8342SChanwoo Choi #endif /* CONFIG_OF */ 1386370ed7a9SAndrzej Hajda 1387370ed7a9SAndrzej Hajda EXPORT_SYMBOL_GPL(extcon_find_edev_by_node); 1388f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); 1389f68a8342SChanwoo Choi 1390707d7550SChanwoo Choi /** 1391707d7550SChanwoo Choi * extcon_get_edev_name() - Get the name of the extcon device. 1392707d7550SChanwoo Choi * @edev: the extcon device 1393707d7550SChanwoo Choi */ 1394707d7550SChanwoo Choi const char *extcon_get_edev_name(struct extcon_dev *edev) 1395707d7550SChanwoo Choi { 1396707d7550SChanwoo Choi return !edev ? NULL : edev->name; 1397707d7550SChanwoo Choi } 1398995bb109SMayank Rana EXPORT_SYMBOL_GPL(extcon_get_edev_name); 1399707d7550SChanwoo Choi 1400f68a8342SChanwoo Choi static int __init extcon_class_init(void) 1401f68a8342SChanwoo Choi { 1402f68a8342SChanwoo Choi return create_extcon_class(); 1403f68a8342SChanwoo Choi } 1404f68a8342SChanwoo Choi module_init(extcon_class_init); 1405f68a8342SChanwoo Choi 1406f68a8342SChanwoo Choi static void __exit extcon_class_exit(void) 1407f68a8342SChanwoo Choi { 1408f68a8342SChanwoo Choi class_destroy(extcon_class); 1409f68a8342SChanwoo Choi } 1410f68a8342SChanwoo Choi module_exit(extcon_class_exit); 1411f68a8342SChanwoo Choi 14122a9de9c0SChanwoo Choi MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 1413f68a8342SChanwoo Choi MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); 14146ab6094fSChanwoo Choi MODULE_DESCRIPTION("External Connector (extcon) framework"); 14156ab6094fSChanwoo Choi MODULE_LICENSE("GPL v2"); 1416