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 { 579ab11af04SChanwoo Choi int ret, index; 580ab11af04SChanwoo Choi unsigned long flags; 581ab11af04SChanwoo Choi 582ab11af04SChanwoo Choi index = find_cable_index_by_id(edev, id); 583ab11af04SChanwoo Choi if (index < 0) 584ab11af04SChanwoo Choi return index; 585ab11af04SChanwoo Choi 586ab11af04SChanwoo Choi /* Check whether the external connector's state is changed. */ 587ab11af04SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 5886ab6094fSChanwoo Choi ret = is_extcon_changed(edev, index, state); 589ab11af04SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 590ab11af04SChanwoo Choi if (!ret) 591ab11af04SChanwoo Choi return 0; 592ab11af04SChanwoo Choi 5936ab6094fSChanwoo Choi ret = extcon_set_state(edev, id, state); 594ab11af04SChanwoo Choi if (ret < 0) 595ab11af04SChanwoo Choi return ret; 596ab11af04SChanwoo Choi 597ab11af04SChanwoo Choi return extcon_sync(edev, id); 598ab11af04SChanwoo Choi } 599ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_state_sync); 600ab11af04SChanwoo Choi 601ab11af04SChanwoo Choi /** 6026ab6094fSChanwoo Choi * extcon_get_property() - Get the property value of an external connector. 6036ab6094fSChanwoo Choi * @edev: the extcon device 6046ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 6056ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 6066ab6094fSChanwoo Choi * @prop_val: the pointer which store the value of extcon property 607792e7e9eSChanwoo Choi * 6086ab6094fSChanwoo Choi * Note that when getting the property value of external connector, 6096ab6094fSChanwoo Choi * the external connector should be attached. If detached state, function 6106ab6094fSChanwoo Choi * return 0 without property value. Also, the each property should be 6116ab6094fSChanwoo Choi * included in the list of supported properties according to extcon type. 612792e7e9eSChanwoo Choi * 6136ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 614792e7e9eSChanwoo Choi */ 615792e7e9eSChanwoo Choi int extcon_get_property(struct extcon_dev *edev, unsigned int id, 616792e7e9eSChanwoo Choi unsigned int prop, 617792e7e9eSChanwoo Choi union extcon_property_value *prop_val) 618792e7e9eSChanwoo Choi { 619792e7e9eSChanwoo Choi struct extcon_cable *cable; 620792e7e9eSChanwoo Choi unsigned long flags; 621792e7e9eSChanwoo Choi int index, ret = 0; 622792e7e9eSChanwoo Choi 623cff7499dSAndy Shevchenko *prop_val = (union extcon_property_value){0}; 624792e7e9eSChanwoo Choi 625792e7e9eSChanwoo Choi if (!edev) 626792e7e9eSChanwoo Choi return -EINVAL; 627792e7e9eSChanwoo Choi 628792e7e9eSChanwoo Choi /* Check whether the property is supported or not */ 629792e7e9eSChanwoo Choi if (!is_extcon_property_supported(id, prop)) 630792e7e9eSChanwoo Choi return -EINVAL; 631792e7e9eSChanwoo Choi 632792e7e9eSChanwoo Choi /* Find the cable index of external connector by using id */ 633792e7e9eSChanwoo Choi index = find_cable_index_by_id(edev, id); 634792e7e9eSChanwoo Choi if (index < 0) 635792e7e9eSChanwoo Choi return index; 636792e7e9eSChanwoo Choi 637792e7e9eSChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 638792e7e9eSChanwoo Choi 6397f2a0a16SChanwoo Choi /* Check whether the property is available or not. */ 6407f2a0a16SChanwoo Choi if (!is_extcon_property_capability(edev, id, index, prop)) { 6417f2a0a16SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 6427f2a0a16SChanwoo Choi return -EPERM; 6437f2a0a16SChanwoo Choi } 6447f2a0a16SChanwoo Choi 645792e7e9eSChanwoo Choi /* 646792e7e9eSChanwoo Choi * Check whether the external connector is attached. 647792e7e9eSChanwoo Choi * If external connector is detached, the user can not 648792e7e9eSChanwoo Choi * get the property value. 649792e7e9eSChanwoo Choi */ 650792e7e9eSChanwoo Choi if (!is_extcon_attached(edev, index)) { 651792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 652792e7e9eSChanwoo Choi return 0; 653792e7e9eSChanwoo Choi } 654792e7e9eSChanwoo Choi 655792e7e9eSChanwoo Choi cable = &edev->cables[index]; 656792e7e9eSChanwoo Choi 657792e7e9eSChanwoo Choi /* Get the property value according to extcon type */ 658792e7e9eSChanwoo Choi switch (prop) { 659792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 660792e7e9eSChanwoo Choi *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN]; 661792e7e9eSChanwoo Choi break; 662792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 663792e7e9eSChanwoo Choi *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN]; 664792e7e9eSChanwoo Choi break; 665792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 666792e7e9eSChanwoo Choi *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN]; 667792e7e9eSChanwoo Choi break; 668792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 669792e7e9eSChanwoo Choi *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN]; 670792e7e9eSChanwoo Choi break; 671792e7e9eSChanwoo Choi default: 672792e7e9eSChanwoo Choi ret = -EINVAL; 673792e7e9eSChanwoo Choi break; 674792e7e9eSChanwoo Choi } 675792e7e9eSChanwoo Choi 676792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 677792e7e9eSChanwoo Choi 678792e7e9eSChanwoo Choi return ret; 679792e7e9eSChanwoo Choi } 680792e7e9eSChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_property); 681792e7e9eSChanwoo Choi 682792e7e9eSChanwoo Choi /** 6836ab6094fSChanwoo Choi * extcon_set_property() - Set the property value of an external connector. 6846ab6094fSChanwoo Choi * @edev: the extcon device 6856ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 6866ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 6876ab6094fSChanwoo Choi * @prop_val: the pointer including the new value of extcon property 688792e7e9eSChanwoo Choi * 6896ab6094fSChanwoo Choi * Note that each property should be included in the list of supported 6906ab6094fSChanwoo Choi * properties according to the extcon type. 691792e7e9eSChanwoo Choi * 6926ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 693792e7e9eSChanwoo Choi */ 694792e7e9eSChanwoo Choi int extcon_set_property(struct extcon_dev *edev, unsigned int id, 695792e7e9eSChanwoo Choi unsigned int prop, 696792e7e9eSChanwoo Choi union extcon_property_value prop_val) 697792e7e9eSChanwoo Choi { 698792e7e9eSChanwoo Choi struct extcon_cable *cable; 699792e7e9eSChanwoo Choi unsigned long flags; 700792e7e9eSChanwoo Choi int index, ret = 0; 701792e7e9eSChanwoo Choi 702792e7e9eSChanwoo Choi if (!edev) 703792e7e9eSChanwoo Choi return -EINVAL; 704792e7e9eSChanwoo Choi 705792e7e9eSChanwoo Choi /* Check whether the property is supported or not */ 706792e7e9eSChanwoo Choi if (!is_extcon_property_supported(id, prop)) 707792e7e9eSChanwoo Choi return -EINVAL; 708792e7e9eSChanwoo Choi 709792e7e9eSChanwoo Choi /* Find the cable index of external connector by using id */ 710792e7e9eSChanwoo Choi index = find_cable_index_by_id(edev, id); 711792e7e9eSChanwoo Choi if (index < 0) 712792e7e9eSChanwoo Choi return index; 713792e7e9eSChanwoo Choi 714792e7e9eSChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 715792e7e9eSChanwoo Choi 7167f2a0a16SChanwoo Choi /* Check whether the property is available or not. */ 7177f2a0a16SChanwoo Choi if (!is_extcon_property_capability(edev, id, index, prop)) { 7187f2a0a16SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 7197f2a0a16SChanwoo Choi return -EPERM; 7207f2a0a16SChanwoo Choi } 7217f2a0a16SChanwoo Choi 722792e7e9eSChanwoo Choi cable = &edev->cables[index]; 723792e7e9eSChanwoo Choi 724792e7e9eSChanwoo Choi /* Set the property value according to extcon type */ 725792e7e9eSChanwoo Choi switch (prop) { 726792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 727792e7e9eSChanwoo Choi cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val; 728792e7e9eSChanwoo Choi break; 729792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 730792e7e9eSChanwoo Choi cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val; 731792e7e9eSChanwoo Choi break; 732792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 733792e7e9eSChanwoo Choi cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val; 734792e7e9eSChanwoo Choi break; 735792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 736792e7e9eSChanwoo Choi cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val; 737792e7e9eSChanwoo Choi break; 738792e7e9eSChanwoo Choi default: 739792e7e9eSChanwoo Choi ret = -EINVAL; 740792e7e9eSChanwoo Choi break; 741792e7e9eSChanwoo Choi } 742792e7e9eSChanwoo Choi 743792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 744792e7e9eSChanwoo Choi 745792e7e9eSChanwoo Choi return ret; 746792e7e9eSChanwoo Choi } 747792e7e9eSChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property); 748792e7e9eSChanwoo Choi 749792e7e9eSChanwoo Choi /** 7506ab6094fSChanwoo Choi * extcon_set_property_sync() - Set property of an external connector with sync. 7516ab6094fSChanwoo Choi * @prop_val: the pointer including the new value of extcon property 752ab11af04SChanwoo Choi * 7536ab6094fSChanwoo Choi * Note that when setting the property value of external connector, 7546ab6094fSChanwoo Choi * the external connector should be attached. The each property should 7556ab6094fSChanwoo Choi * be included in the list of supported properties according to extcon type. 756ab11af04SChanwoo Choi * 7576ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 758ab11af04SChanwoo Choi */ 759ab11af04SChanwoo Choi int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, 760ab11af04SChanwoo Choi unsigned int prop, 761ab11af04SChanwoo Choi union extcon_property_value prop_val) 762ab11af04SChanwoo Choi { 763ab11af04SChanwoo Choi int ret; 764ab11af04SChanwoo Choi 765ab11af04SChanwoo Choi ret = extcon_set_property(edev, id, prop, prop_val); 766ab11af04SChanwoo Choi if (ret < 0) 767ab11af04SChanwoo Choi return ret; 768ab11af04SChanwoo Choi 769ab11af04SChanwoo Choi return extcon_sync(edev, id); 770ab11af04SChanwoo Choi } 771ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property_sync); 772ab11af04SChanwoo Choi 773ab11af04SChanwoo Choi /** 7746ab6094fSChanwoo Choi * extcon_get_property_capability() - Get the capability of the property 7756ab6094fSChanwoo Choi * for an external connector. 7766ab6094fSChanwoo Choi * @edev: the extcon device 7776ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 7786ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 7797f2a0a16SChanwoo Choi * 7807f2a0a16SChanwoo Choi * Returns 1 if the property is available or 0 if not available. 7817f2a0a16SChanwoo Choi */ 7827f2a0a16SChanwoo Choi int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, 7837f2a0a16SChanwoo Choi unsigned int prop) 7847f2a0a16SChanwoo Choi { 7857f2a0a16SChanwoo Choi int index; 7867f2a0a16SChanwoo Choi 7877f2a0a16SChanwoo Choi if (!edev) 7887f2a0a16SChanwoo Choi return -EINVAL; 7897f2a0a16SChanwoo Choi 7907f2a0a16SChanwoo Choi /* Check whether the property is supported or not */ 7917f2a0a16SChanwoo Choi if (!is_extcon_property_supported(id, prop)) 7927f2a0a16SChanwoo Choi return -EINVAL; 7937f2a0a16SChanwoo Choi 7947f2a0a16SChanwoo Choi /* Find the cable index of external connector by using id */ 7957f2a0a16SChanwoo Choi index = find_cable_index_by_id(edev, id); 7967f2a0a16SChanwoo Choi if (index < 0) 7977f2a0a16SChanwoo Choi return index; 7987f2a0a16SChanwoo Choi 7997f2a0a16SChanwoo Choi return is_extcon_property_capability(edev, id, index, prop); 8007f2a0a16SChanwoo Choi } 8017f2a0a16SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_property_capability); 8027f2a0a16SChanwoo Choi 8037f2a0a16SChanwoo Choi /** 8046ab6094fSChanwoo Choi * extcon_set_property_capability() - Set the capability of the property 8056ab6094fSChanwoo Choi * for an external connector. 8066ab6094fSChanwoo Choi * @edev: the extcon device 8076ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 8086ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 8097f2a0a16SChanwoo Choi * 8106ab6094fSChanwoo Choi * Note that this function set the capability of the property 8116ab6094fSChanwoo Choi * for an external connector in order to mark the bit in capability 8126ab6094fSChanwoo Choi * bitmap which mean the available state of the property. 8137f2a0a16SChanwoo Choi * 8146ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 8157f2a0a16SChanwoo Choi */ 8167f2a0a16SChanwoo Choi int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id, 8177f2a0a16SChanwoo Choi unsigned int prop) 8187f2a0a16SChanwoo Choi { 8197f2a0a16SChanwoo Choi struct extcon_cable *cable; 8207f2a0a16SChanwoo Choi int index, type, ret = 0; 8217f2a0a16SChanwoo Choi 8227f2a0a16SChanwoo Choi if (!edev) 8237f2a0a16SChanwoo Choi return -EINVAL; 8247f2a0a16SChanwoo Choi 8257f2a0a16SChanwoo Choi /* Check whether the property is supported or not. */ 8267f2a0a16SChanwoo Choi if (!is_extcon_property_supported(id, prop)) 8277f2a0a16SChanwoo Choi return -EINVAL; 8287f2a0a16SChanwoo Choi 8297f2a0a16SChanwoo Choi /* Find the cable index of external connector by using id. */ 8307f2a0a16SChanwoo Choi index = find_cable_index_by_id(edev, id); 8317f2a0a16SChanwoo Choi if (index < 0) 8327f2a0a16SChanwoo Choi return index; 8337f2a0a16SChanwoo Choi 8347f2a0a16SChanwoo Choi type = get_extcon_type(prop); 8357f2a0a16SChanwoo Choi if (type < 0) 8367f2a0a16SChanwoo Choi return type; 8377f2a0a16SChanwoo Choi 8387f2a0a16SChanwoo Choi cable = &edev->cables[index]; 8397f2a0a16SChanwoo Choi 8407f2a0a16SChanwoo Choi switch (type) { 8417f2a0a16SChanwoo Choi case EXTCON_TYPE_USB: 8427f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); 8437f2a0a16SChanwoo Choi break; 8447f2a0a16SChanwoo Choi case EXTCON_TYPE_CHG: 8457f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); 8467f2a0a16SChanwoo Choi break; 8477f2a0a16SChanwoo Choi case EXTCON_TYPE_JACK: 8487f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); 8497f2a0a16SChanwoo Choi break; 8507f2a0a16SChanwoo Choi case EXTCON_TYPE_DISP: 8517f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); 8527f2a0a16SChanwoo Choi break; 8537f2a0a16SChanwoo Choi default: 8547f2a0a16SChanwoo Choi ret = -EINVAL; 8557f2a0a16SChanwoo Choi } 8567f2a0a16SChanwoo Choi 8577f2a0a16SChanwoo Choi return ret; 8587f2a0a16SChanwoo Choi } 8597f2a0a16SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property_capability); 8607f2a0a16SChanwoo Choi 8617f2a0a16SChanwoo Choi /** 8626ab6094fSChanwoo Choi * extcon_get_extcon_dev() - Get the extcon device instance from the name. 8636ab6094fSChanwoo Choi * @extcon_name: the extcon name provided with extcon_dev_register() 8646ab6094fSChanwoo Choi * 8656ab6094fSChanwoo Choi * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 866f68a8342SChanwoo Choi */ 867f68a8342SChanwoo Choi struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) 868f68a8342SChanwoo Choi { 869f68a8342SChanwoo Choi struct extcon_dev *sd; 870f68a8342SChanwoo Choi 8717eae43aeSChanwoo Choi if (!extcon_name) 8727eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 8737eae43aeSChanwoo Choi 874f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 875f68a8342SChanwoo Choi list_for_each_entry(sd, &extcon_dev_list, entry) { 876f68a8342SChanwoo Choi if (!strcmp(sd->name, extcon_name)) 877f68a8342SChanwoo Choi goto out; 878f68a8342SChanwoo Choi } 879f68a8342SChanwoo Choi sd = NULL; 880f68a8342SChanwoo Choi out: 881f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 882f68a8342SChanwoo Choi return sd; 883f68a8342SChanwoo Choi } 884f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); 885f68a8342SChanwoo Choi 886f68a8342SChanwoo Choi /** 8876ab6094fSChanwoo Choi * extcon_register_notifier() - Register a notifier block to get notified by 8886ab6094fSChanwoo Choi * any state changes from the extcon. 8896ab6094fSChanwoo Choi * @edev: the extcon device 8906ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 8916ab6094fSChanwoo Choi * @nb: a notifier block to be registered 892f68a8342SChanwoo Choi * 893f68a8342SChanwoo Choi * Note that the second parameter given to the callback of nb (val) is 8946ab6094fSChanwoo Choi * the current state of an external connector and the third pameter 8956ab6094fSChanwoo Choi * is the pointer of extcon device. 8966ab6094fSChanwoo Choi * 8976ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 898f68a8342SChanwoo Choi */ 89973b6ecdbSChanwoo Choi int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, 900f68a8342SChanwoo Choi struct notifier_block *nb) 901f68a8342SChanwoo Choi { 90266bee35fSHans de Goede unsigned long flags; 9032c8116a1SManinder Singh int ret, idx = -EINVAL; 904046050f6SChanwoo Choi 90501b4c9a1SChanwoo Choi if (!edev || !nb) 9067eae43aeSChanwoo Choi return -EINVAL; 9077eae43aeSChanwoo Choi 908046050f6SChanwoo Choi idx = find_cable_index_by_id(edev, id); 909a05f44c8SStephen Boyd if (idx < 0) 910a05f44c8SStephen Boyd return idx; 91166bee35fSHans de Goede 91266bee35fSHans de Goede spin_lock_irqsave(&edev->lock, flags); 913046050f6SChanwoo Choi ret = raw_notifier_chain_register(&edev->nh[idx], nb); 91466bee35fSHans de Goede spin_unlock_irqrestore(&edev->lock, flags); 91566bee35fSHans de Goede 91666bee35fSHans de Goede return ret; 917f68a8342SChanwoo Choi } 918f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_register_notifier); 919f68a8342SChanwoo Choi 920f68a8342SChanwoo Choi /** 9216ab6094fSChanwoo Choi * extcon_unregister_notifier() - Unregister a notifier block from the extcon. 9226ab6094fSChanwoo Choi * @edev: the extcon device 9236ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 9246ab6094fSChanwoo Choi * @nb: a notifier block to be registered 9256ab6094fSChanwoo Choi * 9266ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 927f68a8342SChanwoo Choi */ 92873b6ecdbSChanwoo Choi int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, 929f68a8342SChanwoo Choi struct notifier_block *nb) 930f68a8342SChanwoo Choi { 93166bee35fSHans de Goede unsigned long flags; 932046050f6SChanwoo Choi int ret, idx; 933046050f6SChanwoo Choi 9347eae43aeSChanwoo Choi if (!edev || !nb) 9357eae43aeSChanwoo Choi return -EINVAL; 9367eae43aeSChanwoo Choi 937046050f6SChanwoo Choi idx = find_cable_index_by_id(edev, id); 938a05f44c8SStephen Boyd if (idx < 0) 939a05f44c8SStephen Boyd return idx; 94066bee35fSHans de Goede 94166bee35fSHans de Goede spin_lock_irqsave(&edev->lock, flags); 942046050f6SChanwoo Choi ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); 94366bee35fSHans de Goede spin_unlock_irqrestore(&edev->lock, flags); 94466bee35fSHans de Goede 94566bee35fSHans de Goede return ret; 946f68a8342SChanwoo Choi } 947f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_unregister_notifier); 948f68a8342SChanwoo Choi 949815429b3SChanwoo Choi /** 9506ab6094fSChanwoo Choi * extcon_register_notifier_all() - Register a notifier block for all connectors. 9516ab6094fSChanwoo Choi * @edev: the extcon device 9526ab6094fSChanwoo Choi * @nb: a notifier block to be registered 953815429b3SChanwoo Choi * 9546ab6094fSChanwoo Choi * Note that this function registers a notifier block in order to receive 9556ab6094fSChanwoo Choi * the state change of all supported external connectors from extcon device. 956826a47e9SMarkus Elfring * And the second parameter given to the callback of nb (val) is 9576ab6094fSChanwoo Choi * the current state and the third pameter is the pointer of extcon device. 958815429b3SChanwoo Choi * 9596ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 960815429b3SChanwoo Choi */ 961815429b3SChanwoo Choi int extcon_register_notifier_all(struct extcon_dev *edev, 962815429b3SChanwoo Choi struct notifier_block *nb) 963815429b3SChanwoo Choi { 964815429b3SChanwoo Choi unsigned long flags; 965815429b3SChanwoo Choi int ret; 966815429b3SChanwoo Choi 967815429b3SChanwoo Choi if (!edev || !nb) 968815429b3SChanwoo Choi return -EINVAL; 969815429b3SChanwoo Choi 970815429b3SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 971815429b3SChanwoo Choi ret = raw_notifier_chain_register(&edev->nh_all, nb); 972815429b3SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 973815429b3SChanwoo Choi 974815429b3SChanwoo Choi return ret; 975815429b3SChanwoo Choi } 976815429b3SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_register_notifier_all); 977815429b3SChanwoo Choi 978815429b3SChanwoo Choi /** 979815429b3SChanwoo Choi * extcon_unregister_notifier_all() - Unregister a notifier block from extcon. 9806ab6094fSChanwoo Choi * @edev: the extcon device 9816ab6094fSChanwoo Choi * @nb: a notifier block to be registered 982815429b3SChanwoo Choi * 9836ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 984815429b3SChanwoo Choi */ 985815429b3SChanwoo Choi int extcon_unregister_notifier_all(struct extcon_dev *edev, 986815429b3SChanwoo Choi struct notifier_block *nb) 987815429b3SChanwoo Choi { 988815429b3SChanwoo Choi unsigned long flags; 989815429b3SChanwoo Choi int ret; 990815429b3SChanwoo Choi 991815429b3SChanwoo Choi if (!edev || !nb) 992815429b3SChanwoo Choi return -EINVAL; 993815429b3SChanwoo Choi 994815429b3SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 995815429b3SChanwoo Choi ret = raw_notifier_chain_unregister(&edev->nh_all, nb); 996815429b3SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 997815429b3SChanwoo Choi 998815429b3SChanwoo Choi return ret; 999815429b3SChanwoo Choi } 1000815429b3SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_unregister_notifier_all); 1001815429b3SChanwoo Choi 1002f68a8342SChanwoo Choi static struct attribute *extcon_attrs[] = { 1003f68a8342SChanwoo Choi &dev_attr_state.attr, 1004f68a8342SChanwoo Choi &dev_attr_name.attr, 1005f68a8342SChanwoo Choi NULL, 1006f68a8342SChanwoo Choi }; 1007f68a8342SChanwoo Choi ATTRIBUTE_GROUPS(extcon); 1008f68a8342SChanwoo Choi 1009f68a8342SChanwoo Choi static int create_extcon_class(void) 1010f68a8342SChanwoo Choi { 1011f68a8342SChanwoo Choi if (!extcon_class) { 1012f68a8342SChanwoo Choi extcon_class = class_create(THIS_MODULE, "extcon"); 1013f68a8342SChanwoo Choi if (IS_ERR(extcon_class)) 1014f68a8342SChanwoo Choi return PTR_ERR(extcon_class); 1015f68a8342SChanwoo Choi extcon_class->dev_groups = extcon_groups; 1016f68a8342SChanwoo Choi } 1017f68a8342SChanwoo Choi 1018f68a8342SChanwoo Choi return 0; 1019f68a8342SChanwoo Choi } 1020f68a8342SChanwoo Choi 1021f68a8342SChanwoo Choi static void extcon_dev_release(struct device *dev) 1022f68a8342SChanwoo Choi { 1023f68a8342SChanwoo Choi } 1024f68a8342SChanwoo Choi 1025f68a8342SChanwoo Choi static const char *muex_name = "mutually_exclusive"; 1026f68a8342SChanwoo Choi static void dummy_sysfs_dev_release(struct device *dev) 1027f68a8342SChanwoo Choi { 1028f68a8342SChanwoo Choi } 1029f68a8342SChanwoo Choi 1030f68a8342SChanwoo Choi /* 1031f68a8342SChanwoo Choi * extcon_dev_allocate() - Allocate the memory of extcon device. 10326ab6094fSChanwoo Choi * @supported_cable: the array of the supported external connectors 10336ab6094fSChanwoo Choi * ending with EXTCON_NONE. 1034f68a8342SChanwoo Choi * 10356ab6094fSChanwoo Choi * Note that this function allocates the memory for extcon device 10366ab6094fSChanwoo Choi * and initialize default setting for the extcon device. 1037f68a8342SChanwoo Choi * 10386ab6094fSChanwoo Choi * Returns the pointer memory of allocated extcon_dev if success 10396ab6094fSChanwoo Choi * or ERR_PTR(err) if fail. 1040f68a8342SChanwoo Choi */ 104173b6ecdbSChanwoo Choi struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) 1042f68a8342SChanwoo Choi { 1043f68a8342SChanwoo Choi struct extcon_dev *edev; 1044f68a8342SChanwoo Choi 10457eae43aeSChanwoo Choi if (!supported_cable) 10467eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 10477eae43aeSChanwoo Choi 1048f68a8342SChanwoo Choi edev = kzalloc(sizeof(*edev), GFP_KERNEL); 1049f68a8342SChanwoo Choi if (!edev) 1050f68a8342SChanwoo Choi return ERR_PTR(-ENOMEM); 1051f68a8342SChanwoo Choi 1052f68a8342SChanwoo Choi edev->max_supported = 0; 1053f68a8342SChanwoo Choi edev->supported_cable = supported_cable; 1054f68a8342SChanwoo Choi 1055f68a8342SChanwoo Choi return edev; 1056f68a8342SChanwoo Choi } 1057f68a8342SChanwoo Choi 1058f68a8342SChanwoo Choi /* 1059f68a8342SChanwoo Choi * extcon_dev_free() - Free the memory of extcon device. 10606ab6094fSChanwoo Choi * @edev: the extcon device 1061f68a8342SChanwoo Choi */ 1062f68a8342SChanwoo Choi void extcon_dev_free(struct extcon_dev *edev) 1063f68a8342SChanwoo Choi { 1064f68a8342SChanwoo Choi kfree(edev); 1065f68a8342SChanwoo Choi } 1066f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_free); 1067f68a8342SChanwoo Choi 1068f68a8342SChanwoo Choi /** 10696ab6094fSChanwoo Choi * extcon_dev_register() - Register an new extcon device 10706ab6094fSChanwoo Choi * @edev: the extcon device to be registered 1071f68a8342SChanwoo Choi * 1072f68a8342SChanwoo Choi * Among the members of edev struct, please set the "user initializing data" 1073f68a8342SChanwoo Choi * do not set the values of "internal data", which are initialized by 1074f68a8342SChanwoo Choi * this function. 10756ab6094fSChanwoo Choi * 10766ab6094fSChanwoo Choi * Note that before calling this funciton, have to allocate the memory 10776ab6094fSChanwoo Choi * of an extcon device by using the extcon_dev_allocate(). And the extcon 10786ab6094fSChanwoo Choi * dev should include the supported_cable information. 10796ab6094fSChanwoo Choi * 10806ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 1081f68a8342SChanwoo Choi */ 1082f68a8342SChanwoo Choi int extcon_dev_register(struct extcon_dev *edev) 1083f68a8342SChanwoo Choi { 1084f68a8342SChanwoo Choi int ret, index = 0; 108571c3ffa5SChanwoo Choi static atomic_t edev_no = ATOMIC_INIT(-1); 1086f68a8342SChanwoo Choi 1087f68a8342SChanwoo Choi if (!extcon_class) { 1088f68a8342SChanwoo Choi ret = create_extcon_class(); 1089f68a8342SChanwoo Choi if (ret < 0) 1090f68a8342SChanwoo Choi return ret; 1091f68a8342SChanwoo Choi } 1092f68a8342SChanwoo Choi 10937eae43aeSChanwoo Choi if (!edev || !edev->supported_cable) 10942a9de9c0SChanwoo Choi return -EINVAL; 1095f68a8342SChanwoo Choi 10962a9de9c0SChanwoo Choi for (; edev->supported_cable[index] != EXTCON_NONE; index++); 10972a9de9c0SChanwoo Choi 10982a9de9c0SChanwoo Choi edev->max_supported = index; 1099f68a8342SChanwoo Choi if (index > SUPPORTED_CABLE_MAX) { 11002a9de9c0SChanwoo Choi dev_err(&edev->dev, 11012a9de9c0SChanwoo Choi "exceed the maximum number of supported cables\n"); 1102f68a8342SChanwoo Choi return -EINVAL; 1103f68a8342SChanwoo Choi } 1104f68a8342SChanwoo Choi 1105f68a8342SChanwoo Choi edev->dev.class = extcon_class; 1106f68a8342SChanwoo Choi edev->dev.release = extcon_dev_release; 1107f68a8342SChanwoo Choi 110871c3ffa5SChanwoo Choi edev->name = dev_name(edev->dev.parent); 1109f68a8342SChanwoo Choi if (IS_ERR_OR_NULL(edev->name)) { 1110f68a8342SChanwoo Choi dev_err(&edev->dev, 1111f68a8342SChanwoo Choi "extcon device name is null\n"); 1112f68a8342SChanwoo Choi return -EINVAL; 1113f68a8342SChanwoo Choi } 111471c3ffa5SChanwoo Choi dev_set_name(&edev->dev, "extcon%lu", 111571c3ffa5SChanwoo Choi (unsigned long)atomic_inc_return(&edev_no)); 1116f68a8342SChanwoo Choi 1117f68a8342SChanwoo Choi if (edev->max_supported) { 1118f68a8342SChanwoo Choi char *str; 1119f68a8342SChanwoo Choi struct extcon_cable *cable; 1120f68a8342SChanwoo Choi 11216396bb22SKees Cook edev->cables = kcalloc(edev->max_supported, 11226396bb22SKees Cook sizeof(struct extcon_cable), 11236396bb22SKees Cook GFP_KERNEL); 1124f68a8342SChanwoo Choi if (!edev->cables) { 1125f68a8342SChanwoo Choi ret = -ENOMEM; 1126f68a8342SChanwoo Choi goto err_sysfs_alloc; 1127f68a8342SChanwoo Choi } 1128f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) { 1129f68a8342SChanwoo Choi cable = &edev->cables[index]; 1130f68a8342SChanwoo Choi 113169f75a4fSAndy Shevchenko str = kasprintf(GFP_KERNEL, "cable.%d", index); 1132f68a8342SChanwoo Choi if (!str) { 1133f68a8342SChanwoo Choi for (index--; index >= 0; index--) { 1134f68a8342SChanwoo Choi cable = &edev->cables[index]; 1135f68a8342SChanwoo Choi kfree(cable->attr_g.name); 1136f68a8342SChanwoo Choi } 1137f68a8342SChanwoo Choi ret = -ENOMEM; 1138f68a8342SChanwoo Choi 1139f68a8342SChanwoo Choi goto err_alloc_cables; 1140f68a8342SChanwoo Choi } 1141f68a8342SChanwoo Choi 1142f68a8342SChanwoo Choi cable->edev = edev; 1143f68a8342SChanwoo Choi cable->cable_index = index; 1144f68a8342SChanwoo Choi cable->attrs[0] = &cable->attr_name.attr; 1145f68a8342SChanwoo Choi cable->attrs[1] = &cable->attr_state.attr; 1146f68a8342SChanwoo Choi cable->attrs[2] = NULL; 1147f68a8342SChanwoo Choi cable->attr_g.name = str; 1148f68a8342SChanwoo Choi cable->attr_g.attrs = cable->attrs; 1149f68a8342SChanwoo Choi 1150f68a8342SChanwoo Choi sysfs_attr_init(&cable->attr_name.attr); 1151f68a8342SChanwoo Choi cable->attr_name.attr.name = "name"; 1152f68a8342SChanwoo Choi cable->attr_name.attr.mode = 0444; 1153f68a8342SChanwoo Choi cable->attr_name.show = cable_name_show; 1154f68a8342SChanwoo Choi 1155f68a8342SChanwoo Choi sysfs_attr_init(&cable->attr_state.attr); 1156f68a8342SChanwoo Choi cable->attr_state.attr.name = "state"; 1157f68a8342SChanwoo Choi cable->attr_state.attr.mode = 0444; 1158f68a8342SChanwoo Choi cable->attr_state.show = cable_state_show; 1159f68a8342SChanwoo Choi } 1160f68a8342SChanwoo Choi } 1161f68a8342SChanwoo Choi 1162f68a8342SChanwoo Choi if (edev->max_supported && edev->mutually_exclusive) { 1163f68a8342SChanwoo Choi char *name; 1164f68a8342SChanwoo Choi 1165f68a8342SChanwoo Choi /* Count the size of mutually_exclusive array */ 1166f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) 1167f68a8342SChanwoo Choi ; 1168f68a8342SChanwoo Choi 11696396bb22SKees Cook edev->attrs_muex = kcalloc(index + 1, 11706396bb22SKees Cook sizeof(struct attribute *), 11716396bb22SKees Cook GFP_KERNEL); 1172f68a8342SChanwoo Choi if (!edev->attrs_muex) { 1173f68a8342SChanwoo Choi ret = -ENOMEM; 1174f68a8342SChanwoo Choi goto err_muex; 1175f68a8342SChanwoo Choi } 1176f68a8342SChanwoo Choi 11776396bb22SKees Cook edev->d_attrs_muex = kcalloc(index, 11786396bb22SKees Cook sizeof(struct device_attribute), 11796396bb22SKees Cook GFP_KERNEL); 1180f68a8342SChanwoo Choi if (!edev->d_attrs_muex) { 1181f68a8342SChanwoo Choi ret = -ENOMEM; 1182f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1183f68a8342SChanwoo Choi goto err_muex; 1184f68a8342SChanwoo Choi } 1185f68a8342SChanwoo Choi 1186f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) { 118769f75a4fSAndy Shevchenko name = kasprintf(GFP_KERNEL, "0x%x", 118869f75a4fSAndy Shevchenko edev->mutually_exclusive[index]); 1189f68a8342SChanwoo Choi if (!name) { 1190f68a8342SChanwoo Choi for (index--; index >= 0; index--) { 1191f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr. 1192f68a8342SChanwoo Choi name); 1193f68a8342SChanwoo Choi } 1194f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1195f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1196f68a8342SChanwoo Choi ret = -ENOMEM; 1197f68a8342SChanwoo Choi goto err_muex; 1198f68a8342SChanwoo Choi } 1199f68a8342SChanwoo Choi sysfs_attr_init(&edev->d_attrs_muex[index].attr); 1200f68a8342SChanwoo Choi edev->d_attrs_muex[index].attr.name = name; 1201f68a8342SChanwoo Choi edev->d_attrs_muex[index].attr.mode = 0000; 1202f68a8342SChanwoo Choi edev->attrs_muex[index] = &edev->d_attrs_muex[index] 1203f68a8342SChanwoo Choi .attr; 1204f68a8342SChanwoo Choi } 1205f68a8342SChanwoo Choi edev->attr_g_muex.name = muex_name; 1206f68a8342SChanwoo Choi edev->attr_g_muex.attrs = edev->attrs_muex; 1207f68a8342SChanwoo Choi 1208f68a8342SChanwoo Choi } 1209f68a8342SChanwoo Choi 1210f68a8342SChanwoo Choi if (edev->max_supported) { 1211f68a8342SChanwoo Choi edev->extcon_dev_type.groups = 12126396bb22SKees Cook kcalloc(edev->max_supported + 2, 12136396bb22SKees Cook sizeof(struct attribute_group *), 12146396bb22SKees Cook GFP_KERNEL); 1215f68a8342SChanwoo Choi if (!edev->extcon_dev_type.groups) { 1216f68a8342SChanwoo Choi ret = -ENOMEM; 1217f68a8342SChanwoo Choi goto err_alloc_groups; 1218f68a8342SChanwoo Choi } 1219f68a8342SChanwoo Choi 1220f68a8342SChanwoo Choi edev->extcon_dev_type.name = dev_name(&edev->dev); 1221f68a8342SChanwoo Choi edev->extcon_dev_type.release = dummy_sysfs_dev_release; 1222f68a8342SChanwoo Choi 1223f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1224f68a8342SChanwoo Choi edev->extcon_dev_type.groups[index] = 1225f68a8342SChanwoo Choi &edev->cables[index].attr_g; 1226f68a8342SChanwoo Choi if (edev->mutually_exclusive) 1227f68a8342SChanwoo Choi edev->extcon_dev_type.groups[index] = 1228f68a8342SChanwoo Choi &edev->attr_g_muex; 1229f68a8342SChanwoo Choi 1230f68a8342SChanwoo Choi edev->dev.type = &edev->extcon_dev_type; 1231f68a8342SChanwoo Choi } 1232f68a8342SChanwoo Choi 1233f68a8342SChanwoo Choi ret = device_register(&edev->dev); 1234f68a8342SChanwoo Choi if (ret) { 1235f68a8342SChanwoo Choi put_device(&edev->dev); 1236f68a8342SChanwoo Choi goto err_dev; 1237f68a8342SChanwoo Choi } 1238f68a8342SChanwoo Choi 1239f68a8342SChanwoo Choi spin_lock_init(&edev->lock); 12403f5071a8SMarkus Elfring edev->nh = devm_kcalloc(&edev->dev, edev->max_supported, 12413f5071a8SMarkus Elfring sizeof(*edev->nh), GFP_KERNEL); 1242046050f6SChanwoo Choi if (!edev->nh) { 1243046050f6SChanwoo Choi ret = -ENOMEM; 1244046050f6SChanwoo Choi goto err_dev; 1245046050f6SChanwoo Choi } 1246046050f6SChanwoo Choi 1247046050f6SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1248046050f6SChanwoo Choi RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); 1249f68a8342SChanwoo Choi 1250815429b3SChanwoo Choi RAW_INIT_NOTIFIER_HEAD(&edev->nh_all); 1251815429b3SChanwoo Choi 1252f68a8342SChanwoo Choi dev_set_drvdata(&edev->dev, edev); 1253f68a8342SChanwoo Choi edev->state = 0; 1254f68a8342SChanwoo Choi 1255f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 1256f68a8342SChanwoo Choi list_add(&edev->entry, &extcon_dev_list); 1257f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 1258f68a8342SChanwoo Choi 1259f68a8342SChanwoo Choi return 0; 1260f68a8342SChanwoo Choi 1261f68a8342SChanwoo Choi err_dev: 1262f68a8342SChanwoo Choi if (edev->max_supported) 1263f68a8342SChanwoo Choi kfree(edev->extcon_dev_type.groups); 1264f68a8342SChanwoo Choi err_alloc_groups: 1265f68a8342SChanwoo Choi if (edev->max_supported && edev->mutually_exclusive) { 1266f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) 1267f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr.name); 1268f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1269f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1270f68a8342SChanwoo Choi } 1271f68a8342SChanwoo Choi err_muex: 1272f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1273f68a8342SChanwoo Choi kfree(edev->cables[index].attr_g.name); 1274f68a8342SChanwoo Choi err_alloc_cables: 1275f68a8342SChanwoo Choi if (edev->max_supported) 1276f68a8342SChanwoo Choi kfree(edev->cables); 1277f68a8342SChanwoo Choi err_sysfs_alloc: 1278f68a8342SChanwoo Choi return ret; 1279f68a8342SChanwoo Choi } 1280f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_register); 1281f68a8342SChanwoo Choi 1282f68a8342SChanwoo Choi /** 1283f68a8342SChanwoo Choi * extcon_dev_unregister() - Unregister the extcon device. 12846ab6094fSChanwoo Choi * @edev: the extcon device to be unregistered. 1285f68a8342SChanwoo Choi * 1286f68a8342SChanwoo Choi * Note that this does not call kfree(edev) because edev was not allocated 1287f68a8342SChanwoo Choi * by this class. 1288f68a8342SChanwoo Choi */ 1289f68a8342SChanwoo Choi void extcon_dev_unregister(struct extcon_dev *edev) 1290f68a8342SChanwoo Choi { 1291f68a8342SChanwoo Choi int index; 1292f68a8342SChanwoo Choi 12937eae43aeSChanwoo Choi if (!edev) 12947eae43aeSChanwoo Choi return; 12957eae43aeSChanwoo Choi 1296f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 1297f68a8342SChanwoo Choi list_del(&edev->entry); 1298f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 1299f68a8342SChanwoo Choi 1300f68a8342SChanwoo Choi if (IS_ERR_OR_NULL(get_device(&edev->dev))) { 1301f68a8342SChanwoo Choi dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", 1302f68a8342SChanwoo Choi dev_name(&edev->dev)); 1303f68a8342SChanwoo Choi return; 1304f68a8342SChanwoo Choi } 1305f68a8342SChanwoo Choi 1306f68a8342SChanwoo Choi device_unregister(&edev->dev); 1307f68a8342SChanwoo Choi 1308f68a8342SChanwoo Choi if (edev->mutually_exclusive && edev->max_supported) { 1309f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; 1310f68a8342SChanwoo Choi index++) 1311f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr.name); 1312f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1313f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1314f68a8342SChanwoo Choi } 1315f68a8342SChanwoo Choi 1316f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1317f68a8342SChanwoo Choi kfree(edev->cables[index].attr_g.name); 1318f68a8342SChanwoo Choi 1319f68a8342SChanwoo Choi if (edev->max_supported) { 1320f68a8342SChanwoo Choi kfree(edev->extcon_dev_type.groups); 1321f68a8342SChanwoo Choi kfree(edev->cables); 1322f68a8342SChanwoo Choi } 1323f68a8342SChanwoo Choi 1324f68a8342SChanwoo Choi put_device(&edev->dev); 1325f68a8342SChanwoo Choi } 1326f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_unregister); 1327f68a8342SChanwoo Choi 1328f68a8342SChanwoo Choi #ifdef CONFIG_OF 1329370ed7a9SAndrzej Hajda 1330370ed7a9SAndrzej Hajda /* 1331370ed7a9SAndrzej Hajda * extcon_find_edev_by_node - Find the extcon device from devicetree. 1332370ed7a9SAndrzej Hajda * @node : OF node identifying edev 1333370ed7a9SAndrzej Hajda * 1334370ed7a9SAndrzej Hajda * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1335370ed7a9SAndrzej Hajda */ 1336370ed7a9SAndrzej Hajda struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1337370ed7a9SAndrzej Hajda { 1338370ed7a9SAndrzej Hajda struct extcon_dev *edev; 1339370ed7a9SAndrzej Hajda 1340370ed7a9SAndrzej Hajda mutex_lock(&extcon_dev_list_lock); 1341370ed7a9SAndrzej Hajda list_for_each_entry(edev, &extcon_dev_list, entry) 1342370ed7a9SAndrzej Hajda if (edev->dev.parent && edev->dev.parent->of_node == node) 1343370ed7a9SAndrzej Hajda goto out; 1344370ed7a9SAndrzej Hajda edev = ERR_PTR(-EPROBE_DEFER); 1345370ed7a9SAndrzej Hajda out: 1346370ed7a9SAndrzej Hajda mutex_unlock(&extcon_dev_list_lock); 1347370ed7a9SAndrzej Hajda 1348370ed7a9SAndrzej Hajda return edev; 1349370ed7a9SAndrzej Hajda } 1350370ed7a9SAndrzej Hajda 1351f68a8342SChanwoo Choi /* 13526ab6094fSChanwoo Choi * extcon_get_edev_by_phandle - Get the extcon device from devicetree. 13536ab6094fSChanwoo Choi * @dev : the instance to the given device 13546ab6094fSChanwoo Choi * @index : the index into list of extcon_dev 1355f68a8342SChanwoo Choi * 13566ab6094fSChanwoo Choi * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1357f68a8342SChanwoo Choi */ 1358f68a8342SChanwoo Choi struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1359f68a8342SChanwoo Choi { 1360f68a8342SChanwoo Choi struct device_node *node; 1361f68a8342SChanwoo Choi struct extcon_dev *edev; 1362f68a8342SChanwoo Choi 13637eae43aeSChanwoo Choi if (!dev) 13647eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 13657eae43aeSChanwoo Choi 1366f68a8342SChanwoo Choi if (!dev->of_node) { 1367e8752b7aSStephen Boyd dev_dbg(dev, "device does not have a device node entry\n"); 1368f68a8342SChanwoo Choi return ERR_PTR(-EINVAL); 1369f68a8342SChanwoo Choi } 1370f68a8342SChanwoo Choi 1371f68a8342SChanwoo Choi node = of_parse_phandle(dev->of_node, "extcon", index); 1372f68a8342SChanwoo Choi if (!node) { 13735c27036dSRob Herring dev_dbg(dev, "failed to get phandle in %pOF node\n", 13745c27036dSRob Herring dev->of_node); 1375f68a8342SChanwoo Choi return ERR_PTR(-ENODEV); 1376f68a8342SChanwoo Choi } 1377f68a8342SChanwoo Choi 1378370ed7a9SAndrzej Hajda edev = extcon_find_edev_by_node(node); 13795d5c4c13SPeter Chen of_node_put(node); 1380f68a8342SChanwoo Choi 1381370ed7a9SAndrzej Hajda return edev; 1382f68a8342SChanwoo Choi } 1383370ed7a9SAndrzej Hajda 1384f68a8342SChanwoo Choi #else 1385370ed7a9SAndrzej Hajda 1386370ed7a9SAndrzej Hajda struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1387370ed7a9SAndrzej Hajda { 1388370ed7a9SAndrzej Hajda return ERR_PTR(-ENOSYS); 1389370ed7a9SAndrzej Hajda } 1390370ed7a9SAndrzej Hajda 1391f68a8342SChanwoo Choi struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1392f68a8342SChanwoo Choi { 1393f68a8342SChanwoo Choi return ERR_PTR(-ENOSYS); 1394f68a8342SChanwoo Choi } 1395370ed7a9SAndrzej Hajda 1396f68a8342SChanwoo Choi #endif /* CONFIG_OF */ 1397370ed7a9SAndrzej Hajda 1398370ed7a9SAndrzej Hajda EXPORT_SYMBOL_GPL(extcon_find_edev_by_node); 1399f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); 1400f68a8342SChanwoo Choi 1401707d7550SChanwoo Choi /** 1402707d7550SChanwoo Choi * extcon_get_edev_name() - Get the name of the extcon device. 1403707d7550SChanwoo Choi * @edev: the extcon device 1404707d7550SChanwoo Choi */ 1405707d7550SChanwoo Choi const char *extcon_get_edev_name(struct extcon_dev *edev) 1406707d7550SChanwoo Choi { 1407707d7550SChanwoo Choi return !edev ? NULL : edev->name; 1408707d7550SChanwoo Choi } 1409707d7550SChanwoo Choi 1410f68a8342SChanwoo Choi static int __init extcon_class_init(void) 1411f68a8342SChanwoo Choi { 1412f68a8342SChanwoo Choi return create_extcon_class(); 1413f68a8342SChanwoo Choi } 1414f68a8342SChanwoo Choi module_init(extcon_class_init); 1415f68a8342SChanwoo Choi 1416f68a8342SChanwoo Choi static void __exit extcon_class_exit(void) 1417f68a8342SChanwoo Choi { 1418f68a8342SChanwoo Choi class_destroy(extcon_class); 1419f68a8342SChanwoo Choi } 1420f68a8342SChanwoo Choi module_exit(extcon_class_exit); 1421f68a8342SChanwoo Choi 14222a9de9c0SChanwoo Choi MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 1423f68a8342SChanwoo Choi MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); 14246ab6094fSChanwoo Choi MODULE_DESCRIPTION("External Connector (extcon) framework"); 14256ab6094fSChanwoo Choi MODULE_LICENSE("GPL v2"); 1426