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 }, 1703a06ed80SMichael Wu [EXTCON_DISP_CVBS] = { 1713a06ed80SMichael Wu .type = EXTCON_TYPE_DISP, 1723a06ed80SMichael Wu .id = EXTCON_DISP_CVBS, 1733a06ed80SMichael Wu .name = "CVBS", 1743a06ed80SMichael Wu }, 1753a06ed80SMichael Wu [EXTCON_DISP_EDP] = { 1763a06ed80SMichael Wu .type = EXTCON_TYPE_DISP, 1773a06ed80SMichael Wu .id = EXTCON_DISP_EDP, 1783a06ed80SMichael Wu .name = "EDP", 1793a06ed80SMichael Wu }, 1808e9bc36dSChanwoo Choi 18111eecf91SChanwoo Choi /* Miscellaneous external connector */ 18255e4e2f1SChanwoo Choi [EXTCON_DOCK] = { 18355e4e2f1SChanwoo Choi .type = EXTCON_TYPE_MISC, 18455e4e2f1SChanwoo Choi .id = EXTCON_DOCK, 18555e4e2f1SChanwoo Choi .name = "DOCK", 18655e4e2f1SChanwoo Choi }, 18755e4e2f1SChanwoo Choi [EXTCON_JIG] = { 18855e4e2f1SChanwoo Choi .type = EXTCON_TYPE_MISC, 18955e4e2f1SChanwoo Choi .id = EXTCON_JIG, 19055e4e2f1SChanwoo Choi .name = "JIG", 19155e4e2f1SChanwoo Choi }, 19255e4e2f1SChanwoo Choi [EXTCON_MECHANICAL] = { 19355e4e2f1SChanwoo Choi .type = EXTCON_TYPE_MISC, 19455e4e2f1SChanwoo Choi .id = EXTCON_MECHANICAL, 19555e4e2f1SChanwoo Choi .name = "MECHANICAL", 19655e4e2f1SChanwoo Choi }, 1978e9bc36dSChanwoo Choi 19855e4e2f1SChanwoo Choi { /* sentinel */ } 199f68a8342SChanwoo Choi }; 200f68a8342SChanwoo Choi 20120f7b53dSChanwoo Choi /** 2026ab6094fSChanwoo Choi * struct extcon_cable - An internal data for an external connector. 2036ab6094fSChanwoo Choi * @edev: the extcon device 2046ab6094fSChanwoo Choi * @cable_index: the index of this cable in the edev 2056ab6094fSChanwoo Choi * @attr_g: the attribute group for the cable 20620f7b53dSChanwoo Choi * @attr_name: "name" sysfs entry 20720f7b53dSChanwoo Choi * @attr_state: "state" sysfs entry 2086ab6094fSChanwoo Choi * @attrs: the array pointing to attr_name and attr_state for attr_g 20920f7b53dSChanwoo Choi */ 21020f7b53dSChanwoo Choi struct extcon_cable { 21120f7b53dSChanwoo Choi struct extcon_dev *edev; 21220f7b53dSChanwoo Choi int cable_index; 21320f7b53dSChanwoo Choi 21420f7b53dSChanwoo Choi struct attribute_group attr_g; 21520f7b53dSChanwoo Choi struct device_attribute attr_name; 21620f7b53dSChanwoo Choi struct device_attribute attr_state; 21720f7b53dSChanwoo Choi 21820f7b53dSChanwoo Choi struct attribute *attrs[3]; /* to be fed to attr_g.attrs */ 219792e7e9eSChanwoo Choi 220792e7e9eSChanwoo Choi union extcon_property_value usb_propval[EXTCON_PROP_USB_CNT]; 221792e7e9eSChanwoo Choi union extcon_property_value chg_propval[EXTCON_PROP_CHG_CNT]; 222792e7e9eSChanwoo Choi union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT]; 223792e7e9eSChanwoo Choi union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT]; 2247f2a0a16SChanwoo Choi 2257f2a0a16SChanwoo Choi unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)]; 2267f2a0a16SChanwoo Choi unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)]; 2277f2a0a16SChanwoo Choi unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)]; 2287f2a0a16SChanwoo Choi unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)]; 22920f7b53dSChanwoo Choi }; 23020f7b53dSChanwoo Choi 231f68a8342SChanwoo Choi static struct class *extcon_class; 232f68a8342SChanwoo Choi 233f68a8342SChanwoo Choi static LIST_HEAD(extcon_dev_list); 234f68a8342SChanwoo Choi static DEFINE_MUTEX(extcon_dev_list_lock); 235f68a8342SChanwoo Choi 236f68a8342SChanwoo Choi static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) 237f68a8342SChanwoo Choi { 238f68a8342SChanwoo Choi int i = 0; 239f68a8342SChanwoo Choi 240f68a8342SChanwoo Choi if (!edev->mutually_exclusive) 241f68a8342SChanwoo Choi return 0; 242f68a8342SChanwoo Choi 243f68a8342SChanwoo Choi for (i = 0; edev->mutually_exclusive[i]; i++) { 244f68a8342SChanwoo Choi int weight; 245f68a8342SChanwoo Choi u32 correspondants = new_state & edev->mutually_exclusive[i]; 246f68a8342SChanwoo Choi 247f68a8342SChanwoo Choi /* calculate the total number of bits set */ 248f68a8342SChanwoo Choi weight = hweight32(correspondants); 249f68a8342SChanwoo Choi if (weight > 1) 250f68a8342SChanwoo Choi return i + 1; 251f68a8342SChanwoo Choi } 252f68a8342SChanwoo Choi 253f68a8342SChanwoo Choi return 0; 254f68a8342SChanwoo Choi } 255f68a8342SChanwoo Choi 25673b6ecdbSChanwoo Choi static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id) 2572a9de9c0SChanwoo Choi { 2582a9de9c0SChanwoo Choi int i; 2592a9de9c0SChanwoo Choi 26097e1bb93SJiang Jian /* Find the index of extcon cable in edev->supported_cable */ 2612a9de9c0SChanwoo Choi for (i = 0; i < edev->max_supported; i++) { 2622a9de9c0SChanwoo Choi if (edev->supported_cable[i] == id) 2632a9de9c0SChanwoo Choi return i; 2642a9de9c0SChanwoo Choi } 2652a9de9c0SChanwoo Choi 2662a9de9c0SChanwoo Choi return -EINVAL; 2672a9de9c0SChanwoo Choi } 2682a9de9c0SChanwoo Choi 269792e7e9eSChanwoo Choi static int get_extcon_type(unsigned int prop) 270792e7e9eSChanwoo Choi { 271792e7e9eSChanwoo Choi switch (prop) { 272792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 273792e7e9eSChanwoo Choi return EXTCON_TYPE_USB; 274792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 275792e7e9eSChanwoo Choi return EXTCON_TYPE_CHG; 276792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 277792e7e9eSChanwoo Choi return EXTCON_TYPE_JACK; 278792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 279792e7e9eSChanwoo Choi return EXTCON_TYPE_DISP; 280792e7e9eSChanwoo Choi default: 281792e7e9eSChanwoo Choi return -EINVAL; 282792e7e9eSChanwoo Choi } 283792e7e9eSChanwoo Choi } 284792e7e9eSChanwoo Choi 285792e7e9eSChanwoo Choi static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index) 286792e7e9eSChanwoo Choi { 287792e7e9eSChanwoo Choi return !!(edev->state & BIT(index)); 288792e7e9eSChanwoo Choi } 289792e7e9eSChanwoo Choi 290ab11af04SChanwoo Choi static bool is_extcon_changed(struct extcon_dev *edev, int index, 291ab11af04SChanwoo Choi bool new_state) 292046050f6SChanwoo Choi { 293ab11af04SChanwoo Choi int state = !!(edev->state & BIT(index)); 294ab11af04SChanwoo Choi return (state != new_state); 295046050f6SChanwoo Choi } 296046050f6SChanwoo Choi 297792e7e9eSChanwoo Choi static bool is_extcon_property_supported(unsigned int id, unsigned int prop) 298792e7e9eSChanwoo Choi { 299792e7e9eSChanwoo Choi int type; 300792e7e9eSChanwoo Choi 301792e7e9eSChanwoo Choi /* Check whether the property is supported or not. */ 302792e7e9eSChanwoo Choi type = get_extcon_type(prop); 303792e7e9eSChanwoo Choi if (type < 0) 304792e7e9eSChanwoo Choi return false; 305792e7e9eSChanwoo Choi 306792e7e9eSChanwoo Choi /* Check whether a specific extcon id supports the property or not. */ 307792e7e9eSChanwoo Choi return !!(extcon_info[id].type & type); 308792e7e9eSChanwoo Choi } 309792e7e9eSChanwoo Choi 3107f2a0a16SChanwoo Choi static int is_extcon_property_capability(struct extcon_dev *edev, 3117f2a0a16SChanwoo Choi unsigned int id, int index,unsigned int prop) 3127f2a0a16SChanwoo Choi { 3137f2a0a16SChanwoo Choi struct extcon_cable *cable; 3147f2a0a16SChanwoo Choi int type, ret; 3157f2a0a16SChanwoo Choi 3167f2a0a16SChanwoo Choi /* Check whether the property is supported or not. */ 3177f2a0a16SChanwoo Choi type = get_extcon_type(prop); 3187f2a0a16SChanwoo Choi if (type < 0) 3197f2a0a16SChanwoo Choi return type; 3207f2a0a16SChanwoo Choi 3217f2a0a16SChanwoo Choi cable = &edev->cables[index]; 3227f2a0a16SChanwoo Choi 3237f2a0a16SChanwoo Choi switch (type) { 3247f2a0a16SChanwoo Choi case EXTCON_TYPE_USB: 3257f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); 3267f2a0a16SChanwoo Choi break; 3277f2a0a16SChanwoo Choi case EXTCON_TYPE_CHG: 3287f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); 3297f2a0a16SChanwoo Choi break; 3307f2a0a16SChanwoo Choi case EXTCON_TYPE_JACK: 3317f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); 3327f2a0a16SChanwoo Choi break; 3337f2a0a16SChanwoo Choi case EXTCON_TYPE_DISP: 3347f2a0a16SChanwoo Choi ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); 3357f2a0a16SChanwoo Choi break; 3367f2a0a16SChanwoo Choi default: 3377f2a0a16SChanwoo Choi ret = -EINVAL; 3387f2a0a16SChanwoo Choi } 3397f2a0a16SChanwoo Choi 3407f2a0a16SChanwoo Choi return ret; 3417f2a0a16SChanwoo Choi } 3427f2a0a16SChanwoo Choi 343792e7e9eSChanwoo Choi static void init_property(struct extcon_dev *edev, unsigned int id, int index) 344792e7e9eSChanwoo Choi { 345792e7e9eSChanwoo Choi unsigned int type = extcon_info[id].type; 346792e7e9eSChanwoo Choi struct extcon_cable *cable = &edev->cables[index]; 347792e7e9eSChanwoo Choi 348792e7e9eSChanwoo Choi if (EXTCON_TYPE_USB & type) 349792e7e9eSChanwoo Choi memset(cable->usb_propval, 0, sizeof(cable->usb_propval)); 350792e7e9eSChanwoo Choi if (EXTCON_TYPE_CHG & type) 351792e7e9eSChanwoo Choi memset(cable->chg_propval, 0, sizeof(cable->chg_propval)); 352792e7e9eSChanwoo Choi if (EXTCON_TYPE_JACK & type) 353792e7e9eSChanwoo Choi memset(cable->jack_propval, 0, sizeof(cable->jack_propval)); 354792e7e9eSChanwoo Choi if (EXTCON_TYPE_DISP & type) 355792e7e9eSChanwoo Choi memset(cable->disp_propval, 0, sizeof(cable->disp_propval)); 356792e7e9eSChanwoo Choi } 357792e7e9eSChanwoo Choi 358f68a8342SChanwoo Choi static ssize_t state_show(struct device *dev, struct device_attribute *attr, 359f68a8342SChanwoo Choi char *buf) 360f68a8342SChanwoo Choi { 361f68a8342SChanwoo Choi int i, count = 0; 362f68a8342SChanwoo Choi struct extcon_dev *edev = dev_get_drvdata(dev); 363f68a8342SChanwoo Choi 364f68a8342SChanwoo Choi if (edev->max_supported == 0) 365f68a8342SChanwoo Choi return sprintf(buf, "%u\n", edev->state); 366f68a8342SChanwoo Choi 3672a9de9c0SChanwoo Choi for (i = 0; i < edev->max_supported; i++) { 368f68a8342SChanwoo Choi count += sprintf(buf + count, "%s=%d\n", 36955e4e2f1SChanwoo Choi extcon_info[edev->supported_cable[i]].name, 37070641a0aSChanwoo Choi !!(edev->state & BIT(i))); 371f68a8342SChanwoo Choi } 372f68a8342SChanwoo Choi 373f68a8342SChanwoo Choi return count; 374f68a8342SChanwoo Choi } 3755d5321e9SChanwoo Choi static DEVICE_ATTR_RO(state); 376f68a8342SChanwoo Choi 377f68a8342SChanwoo Choi static ssize_t name_show(struct device *dev, struct device_attribute *attr, 378f68a8342SChanwoo Choi char *buf) 379f68a8342SChanwoo Choi { 380f68a8342SChanwoo Choi struct extcon_dev *edev = dev_get_drvdata(dev); 381f68a8342SChanwoo Choi 38271c3ffa5SChanwoo Choi return sprintf(buf, "%s\n", edev->name); 383f68a8342SChanwoo Choi } 384f68a8342SChanwoo Choi static DEVICE_ATTR_RO(name); 385f68a8342SChanwoo Choi 386f68a8342SChanwoo Choi static ssize_t cable_name_show(struct device *dev, 387f68a8342SChanwoo Choi struct device_attribute *attr, char *buf) 388f68a8342SChanwoo Choi { 389f68a8342SChanwoo Choi struct extcon_cable *cable = container_of(attr, struct extcon_cable, 390f68a8342SChanwoo Choi attr_name); 3912a9de9c0SChanwoo Choi int i = cable->cable_index; 392f68a8342SChanwoo Choi 393f68a8342SChanwoo Choi return sprintf(buf, "%s\n", 39455e4e2f1SChanwoo Choi extcon_info[cable->edev->supported_cable[i]].name); 395f68a8342SChanwoo Choi } 396f68a8342SChanwoo Choi 397f68a8342SChanwoo Choi static ssize_t cable_state_show(struct device *dev, 398f68a8342SChanwoo Choi struct device_attribute *attr, char *buf) 399f68a8342SChanwoo Choi { 400f68a8342SChanwoo Choi struct extcon_cable *cable = container_of(attr, struct extcon_cable, 401f68a8342SChanwoo Choi attr_state); 402f68a8342SChanwoo Choi 403be052cc8SRoger Quadros int i = cable->cable_index; 404be052cc8SRoger Quadros 405f68a8342SChanwoo Choi return sprintf(buf, "%d\n", 406575c2b86SChanwoo Choi extcon_get_state(cable->edev, cable->edev->supported_cable[i])); 407f68a8342SChanwoo Choi } 408f68a8342SChanwoo Choi 409f68a8342SChanwoo Choi /** 4106ab6094fSChanwoo Choi * extcon_sync() - Synchronize the state for an external connector. 4116ab6094fSChanwoo Choi * @edev: the extcon device 4126506f6a0SYang Li * @id: the unique id indicating an external connector 413f68a8342SChanwoo Choi * 4146ab6094fSChanwoo Choi * Note that this function send a notification in order to synchronize 4156ab6094fSChanwoo Choi * the state and property of an external connector. 4166ab6094fSChanwoo Choi * 4176ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 418f68a8342SChanwoo Choi */ 419ab11af04SChanwoo Choi int extcon_sync(struct extcon_dev *edev, unsigned int id) 420f68a8342SChanwoo Choi { 421f68a8342SChanwoo Choi char name_buf[120]; 422f68a8342SChanwoo Choi char state_buf[120]; 423f68a8342SChanwoo Choi char *prop_buf; 424f68a8342SChanwoo Choi char *envp[3]; 425f68a8342SChanwoo Choi int env_offset = 0; 426f68a8342SChanwoo Choi int length; 427046050f6SChanwoo Choi int index; 428ab11af04SChanwoo Choi int state; 429f68a8342SChanwoo Choi unsigned long flags; 430f68a8342SChanwoo Choi 4317eae43aeSChanwoo Choi if (!edev) 4327eae43aeSChanwoo Choi return -EINVAL; 4337eae43aeSChanwoo Choi 434ab11af04SChanwoo Choi index = find_cable_index_by_id(edev, id); 435ab11af04SChanwoo Choi if (index < 0) 436ab11af04SChanwoo Choi return index; 437ab11af04SChanwoo Choi 438f68a8342SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 439ab11af04SChanwoo Choi state = !!(edev->state & BIT(index)); 4408a9dbb77SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 441815429b3SChanwoo Choi 442815429b3SChanwoo Choi /* 443815429b3SChanwoo Choi * Call functions in a raw notifier chain for the specific one 444815429b3SChanwoo Choi * external connector. 445815429b3SChanwoo Choi */ 446ab11af04SChanwoo Choi raw_notifier_call_chain(&edev->nh[index], state, edev); 447f7a89811SRoger Quadros 448815429b3SChanwoo Choi /* 449815429b3SChanwoo Choi * Call functions in a raw notifier chain for the all supported 450815429b3SChanwoo Choi * external connectors. 451815429b3SChanwoo Choi */ 452815429b3SChanwoo Choi raw_notifier_call_chain(&edev->nh_all, state, edev); 453815429b3SChanwoo Choi 4548a9dbb77SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 455f68a8342SChanwoo Choi /* This could be in interrupt handler */ 456f68a8342SChanwoo Choi prop_buf = (char *)get_zeroed_page(GFP_ATOMIC); 457ab11af04SChanwoo Choi if (!prop_buf) { 458f68a8342SChanwoo Choi /* Unlock early before uevent */ 459f68a8342SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 460f68a8342SChanwoo Choi 461f68a8342SChanwoo Choi dev_err(&edev->dev, "out of memory in extcon_set_state\n"); 462f68a8342SChanwoo Choi kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE); 463f68a8342SChanwoo Choi 464e7d9dd5aSPan Bian return -ENOMEM; 465f68a8342SChanwoo Choi } 466f68a8342SChanwoo Choi 467ab11af04SChanwoo Choi length = name_show(&edev->dev, NULL, prop_buf); 468ab11af04SChanwoo Choi if (length > 0) { 469ab11af04SChanwoo Choi if (prop_buf[length - 1] == '\n') 470ab11af04SChanwoo Choi prop_buf[length - 1] = 0; 471ab11af04SChanwoo Choi snprintf(name_buf, sizeof(name_buf), "NAME=%s", prop_buf); 472ab11af04SChanwoo Choi envp[env_offset++] = name_buf; 473ab11af04SChanwoo Choi } 474ab11af04SChanwoo Choi 475ab11af04SChanwoo Choi length = state_show(&edev->dev, NULL, prop_buf); 476ab11af04SChanwoo Choi if (length > 0) { 477ab11af04SChanwoo Choi if (prop_buf[length - 1] == '\n') 478ab11af04SChanwoo Choi prop_buf[length - 1] = 0; 479ab11af04SChanwoo Choi snprintf(state_buf, sizeof(state_buf), "STATE=%s", prop_buf); 480ab11af04SChanwoo Choi envp[env_offset++] = state_buf; 481ab11af04SChanwoo Choi } 482ab11af04SChanwoo Choi envp[env_offset] = NULL; 483ab11af04SChanwoo Choi 484ab11af04SChanwoo Choi /* Unlock early before uevent */ 485ab11af04SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 486ab11af04SChanwoo Choi kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp); 487ab11af04SChanwoo Choi free_page((unsigned long)prop_buf); 488ab11af04SChanwoo Choi 489ab11af04SChanwoo Choi return 0; 490ab11af04SChanwoo Choi } 491ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_sync); 492ab11af04SChanwoo Choi 493f68a8342SChanwoo Choi /** 4946ab6094fSChanwoo Choi * extcon_get_state() - Get the state of an external connector. 4956ab6094fSChanwoo Choi * @edev: the extcon device 4966ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 4976ab6094fSChanwoo Choi * 4986ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 499f68a8342SChanwoo Choi */ 500575c2b86SChanwoo Choi int extcon_get_state(struct extcon_dev *edev, const unsigned int id) 501f68a8342SChanwoo Choi { 502575c2b86SChanwoo Choi int index, state; 503575c2b86SChanwoo Choi unsigned long flags; 5042a9de9c0SChanwoo Choi 5057eae43aeSChanwoo Choi if (!edev) 5067eae43aeSChanwoo Choi return -EINVAL; 5077eae43aeSChanwoo Choi 5082a9de9c0SChanwoo Choi index = find_cable_index_by_id(edev, id); 5092a9de9c0SChanwoo Choi if (index < 0) 5102a9de9c0SChanwoo Choi return index; 5112a9de9c0SChanwoo Choi 512575c2b86SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 513575c2b86SChanwoo Choi state = is_extcon_attached(edev, index); 514575c2b86SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 515f68a8342SChanwoo Choi 516575c2b86SChanwoo Choi return state; 517f68a8342SChanwoo Choi } 518575c2b86SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_state); 519f68a8342SChanwoo Choi 520f68a8342SChanwoo Choi /** 5216ab6094fSChanwoo Choi * extcon_set_state() - Set the state of an external connector. 5226ab6094fSChanwoo Choi * @edev: the extcon device 5236ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 5246ab6094fSChanwoo Choi * @state: the new state of an external connector. 5256ab6094fSChanwoo Choi * the default semantics is true: attached / false: detached. 526ab11af04SChanwoo Choi * 5276ab6094fSChanwoo Choi * Note that this function set the state of an external connector without 5286ab6094fSChanwoo Choi * a notification. To synchronize the state of an external connector, 5296ab6094fSChanwoo Choi * have to use extcon_set_state_sync() and extcon_sync(). 5306ab6094fSChanwoo Choi * 5316ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 532f68a8342SChanwoo Choi */ 5336ab6094fSChanwoo Choi int extcon_set_state(struct extcon_dev *edev, unsigned int id, bool state) 534f68a8342SChanwoo Choi { 535ab11af04SChanwoo Choi unsigned long flags; 536ab11af04SChanwoo Choi int index, ret = 0; 537f68a8342SChanwoo Choi 5387eae43aeSChanwoo Choi if (!edev) 5397eae43aeSChanwoo Choi return -EINVAL; 5407eae43aeSChanwoo Choi 5412a9de9c0SChanwoo Choi index = find_cable_index_by_id(edev, id); 5422a9de9c0SChanwoo Choi if (index < 0) 5432a9de9c0SChanwoo Choi return index; 5442a9de9c0SChanwoo Choi 545ab11af04SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 546ab11af04SChanwoo Choi 547ab11af04SChanwoo Choi /* Check whether the external connector's state is changed. */ 5486ab6094fSChanwoo Choi if (!is_extcon_changed(edev, index, state)) 549ab11af04SChanwoo Choi goto out; 550ab11af04SChanwoo Choi 551ab11af04SChanwoo Choi if (check_mutually_exclusive(edev, 5526ab6094fSChanwoo Choi (edev->state & ~BIT(index)) | (state & BIT(index)))) { 553ab11af04SChanwoo Choi ret = -EPERM; 554ab11af04SChanwoo Choi goto out; 555ab11af04SChanwoo Choi } 556ab11af04SChanwoo Choi 557792e7e9eSChanwoo Choi /* 558792e7e9eSChanwoo Choi * Initialize the value of extcon property before setting 559792e7e9eSChanwoo Choi * the detached state for an external connector. 560792e7e9eSChanwoo Choi */ 5616ab6094fSChanwoo Choi if (!state) 562792e7e9eSChanwoo Choi init_property(edev, id, index); 563792e7e9eSChanwoo Choi 5646ab6094fSChanwoo Choi /* Update the state for an external connector. */ 5656ab6094fSChanwoo Choi if (state) 566ab11af04SChanwoo Choi edev->state |= BIT(index); 567ab11af04SChanwoo Choi else 568ab11af04SChanwoo Choi edev->state &= ~(BIT(index)); 569ab11af04SChanwoo Choi out: 570ab11af04SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 571ab11af04SChanwoo Choi 572ab11af04SChanwoo Choi return ret; 573f68a8342SChanwoo Choi } 574575c2b86SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_state); 575f68a8342SChanwoo Choi 576f68a8342SChanwoo Choi /** 5776ab6094fSChanwoo Choi * extcon_set_state_sync() - Set the state of an external connector with sync. 5786ab6094fSChanwoo Choi * @edev: the extcon device 5796ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 5806ab6094fSChanwoo Choi * @state: the new state of external connector. 5816ab6094fSChanwoo Choi * the default semantics is true: attached / false: detached. 582ab11af04SChanwoo Choi * 5836ab6094fSChanwoo Choi * Note that this function set the state of external connector 5846ab6094fSChanwoo Choi * and synchronize the state by sending a notification. 5856ab6094fSChanwoo Choi * 5866ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 587ab11af04SChanwoo Choi */ 5886ab6094fSChanwoo Choi int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state) 589ab11af04SChanwoo Choi { 5902da3db7fSAlexander Stein int ret; 591ab11af04SChanwoo Choi 5926ab6094fSChanwoo Choi ret = extcon_set_state(edev, id, state); 593ab11af04SChanwoo Choi if (ret < 0) 594ab11af04SChanwoo Choi return ret; 595ab11af04SChanwoo Choi 596ab11af04SChanwoo Choi return extcon_sync(edev, id); 597ab11af04SChanwoo Choi } 598ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_state_sync); 599ab11af04SChanwoo Choi 600ab11af04SChanwoo Choi /** 6016ab6094fSChanwoo Choi * extcon_get_property() - Get the property value of an external connector. 6026ab6094fSChanwoo Choi * @edev: the extcon device 6036ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 6046ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 6056ab6094fSChanwoo Choi * @prop_val: the pointer which store the value of extcon property 606792e7e9eSChanwoo Choi * 6076ab6094fSChanwoo Choi * Note that when getting the property value of external connector, 6086ab6094fSChanwoo Choi * the external connector should be attached. If detached state, function 6096ab6094fSChanwoo Choi * return 0 without property value. Also, the each property should be 6106ab6094fSChanwoo Choi * included in the list of supported properties according to extcon type. 611792e7e9eSChanwoo Choi * 6126ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 613792e7e9eSChanwoo Choi */ 614792e7e9eSChanwoo Choi int extcon_get_property(struct extcon_dev *edev, unsigned int id, 615792e7e9eSChanwoo Choi unsigned int prop, 616792e7e9eSChanwoo Choi union extcon_property_value *prop_val) 617792e7e9eSChanwoo Choi { 618792e7e9eSChanwoo Choi struct extcon_cable *cable; 619792e7e9eSChanwoo Choi unsigned long flags; 620792e7e9eSChanwoo Choi int index, ret = 0; 621792e7e9eSChanwoo Choi 622cff7499dSAndy Shevchenko *prop_val = (union extcon_property_value){0}; 623792e7e9eSChanwoo Choi 624792e7e9eSChanwoo Choi if (!edev) 625792e7e9eSChanwoo Choi return -EINVAL; 626792e7e9eSChanwoo Choi 627792e7e9eSChanwoo Choi /* Check whether the property is supported or not */ 628792e7e9eSChanwoo Choi if (!is_extcon_property_supported(id, prop)) 629792e7e9eSChanwoo Choi return -EINVAL; 630792e7e9eSChanwoo Choi 631792e7e9eSChanwoo Choi /* Find the cable index of external connector by using id */ 632792e7e9eSChanwoo Choi index = find_cable_index_by_id(edev, id); 633792e7e9eSChanwoo Choi if (index < 0) 634792e7e9eSChanwoo Choi return index; 635792e7e9eSChanwoo Choi 636792e7e9eSChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 637792e7e9eSChanwoo Choi 6387f2a0a16SChanwoo Choi /* Check whether the property is available or not. */ 6397f2a0a16SChanwoo Choi if (!is_extcon_property_capability(edev, id, index, prop)) { 6407f2a0a16SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 6417f2a0a16SChanwoo Choi return -EPERM; 6427f2a0a16SChanwoo Choi } 6437f2a0a16SChanwoo Choi 644792e7e9eSChanwoo Choi /* 645792e7e9eSChanwoo Choi * Check whether the external connector is attached. 646792e7e9eSChanwoo Choi * If external connector is detached, the user can not 647792e7e9eSChanwoo Choi * get the property value. 648792e7e9eSChanwoo Choi */ 649792e7e9eSChanwoo Choi if (!is_extcon_attached(edev, index)) { 650792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 651792e7e9eSChanwoo Choi return 0; 652792e7e9eSChanwoo Choi } 653792e7e9eSChanwoo Choi 654792e7e9eSChanwoo Choi cable = &edev->cables[index]; 655792e7e9eSChanwoo Choi 656792e7e9eSChanwoo Choi /* Get the property value according to extcon type */ 657792e7e9eSChanwoo Choi switch (prop) { 658792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 659792e7e9eSChanwoo Choi *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN]; 660792e7e9eSChanwoo Choi break; 661792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 662792e7e9eSChanwoo Choi *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN]; 663792e7e9eSChanwoo Choi break; 664792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 665792e7e9eSChanwoo Choi *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN]; 666792e7e9eSChanwoo Choi break; 667792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 668792e7e9eSChanwoo Choi *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN]; 669792e7e9eSChanwoo Choi break; 670792e7e9eSChanwoo Choi default: 671792e7e9eSChanwoo Choi ret = -EINVAL; 672792e7e9eSChanwoo Choi break; 673792e7e9eSChanwoo Choi } 674792e7e9eSChanwoo Choi 675792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 676792e7e9eSChanwoo Choi 677792e7e9eSChanwoo Choi return ret; 678792e7e9eSChanwoo Choi } 679792e7e9eSChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_property); 680792e7e9eSChanwoo Choi 681792e7e9eSChanwoo Choi /** 6826ab6094fSChanwoo Choi * extcon_set_property() - Set the property value of an external connector. 6836ab6094fSChanwoo Choi * @edev: the extcon device 6846ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 6856ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 6866ab6094fSChanwoo Choi * @prop_val: the pointer including the new value of extcon property 687792e7e9eSChanwoo Choi * 6886ab6094fSChanwoo Choi * Note that each property should be included in the list of supported 6896ab6094fSChanwoo Choi * properties according to the extcon type. 690792e7e9eSChanwoo Choi * 6916ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 692792e7e9eSChanwoo Choi */ 693792e7e9eSChanwoo Choi int extcon_set_property(struct extcon_dev *edev, unsigned int id, 694792e7e9eSChanwoo Choi unsigned int prop, 695792e7e9eSChanwoo Choi union extcon_property_value prop_val) 696792e7e9eSChanwoo Choi { 697792e7e9eSChanwoo Choi struct extcon_cable *cable; 698792e7e9eSChanwoo Choi unsigned long flags; 699792e7e9eSChanwoo Choi int index, ret = 0; 700792e7e9eSChanwoo Choi 701792e7e9eSChanwoo Choi if (!edev) 702792e7e9eSChanwoo Choi return -EINVAL; 703792e7e9eSChanwoo Choi 704792e7e9eSChanwoo Choi /* Check whether the property is supported or not */ 705792e7e9eSChanwoo Choi if (!is_extcon_property_supported(id, prop)) 706792e7e9eSChanwoo Choi return -EINVAL; 707792e7e9eSChanwoo Choi 708792e7e9eSChanwoo Choi /* Find the cable index of external connector by using id */ 709792e7e9eSChanwoo Choi index = find_cable_index_by_id(edev, id); 710792e7e9eSChanwoo Choi if (index < 0) 711792e7e9eSChanwoo Choi return index; 712792e7e9eSChanwoo Choi 713792e7e9eSChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 714792e7e9eSChanwoo Choi 7157f2a0a16SChanwoo Choi /* Check whether the property is available or not. */ 7167f2a0a16SChanwoo Choi if (!is_extcon_property_capability(edev, id, index, prop)) { 7177f2a0a16SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 7187f2a0a16SChanwoo Choi return -EPERM; 7197f2a0a16SChanwoo Choi } 7207f2a0a16SChanwoo Choi 721792e7e9eSChanwoo Choi cable = &edev->cables[index]; 722792e7e9eSChanwoo Choi 723792e7e9eSChanwoo Choi /* Set the property value according to extcon type */ 724792e7e9eSChanwoo Choi switch (prop) { 725792e7e9eSChanwoo Choi case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 726792e7e9eSChanwoo Choi cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val; 727792e7e9eSChanwoo Choi break; 728792e7e9eSChanwoo Choi case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 729792e7e9eSChanwoo Choi cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val; 730792e7e9eSChanwoo Choi break; 731792e7e9eSChanwoo Choi case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 732792e7e9eSChanwoo Choi cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val; 733792e7e9eSChanwoo Choi break; 734792e7e9eSChanwoo Choi case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 735792e7e9eSChanwoo Choi cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val; 736792e7e9eSChanwoo Choi break; 737792e7e9eSChanwoo Choi default: 738792e7e9eSChanwoo Choi ret = -EINVAL; 739792e7e9eSChanwoo Choi break; 740792e7e9eSChanwoo Choi } 741792e7e9eSChanwoo Choi 742792e7e9eSChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 743792e7e9eSChanwoo Choi 744792e7e9eSChanwoo Choi return ret; 745792e7e9eSChanwoo Choi } 746792e7e9eSChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property); 747792e7e9eSChanwoo Choi 748792e7e9eSChanwoo Choi /** 7496ab6094fSChanwoo Choi * extcon_set_property_sync() - Set property of an external connector with sync. 7506506f6a0SYang Li * @edev: the extcon device 7516506f6a0SYang Li * @id: the unique id indicating an external connector 7526506f6a0SYang Li * @prop: the property id indicating an extcon property 7536ab6094fSChanwoo Choi * @prop_val: the pointer including the new value of extcon property 754ab11af04SChanwoo Choi * 7556ab6094fSChanwoo Choi * Note that when setting the property value of external connector, 7566ab6094fSChanwoo Choi * the external connector should be attached. The each property should 7576ab6094fSChanwoo Choi * be included in the list of supported properties according to extcon type. 758ab11af04SChanwoo Choi * 7596ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 760ab11af04SChanwoo Choi */ 761ab11af04SChanwoo Choi int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, 762ab11af04SChanwoo Choi unsigned int prop, 763ab11af04SChanwoo Choi union extcon_property_value prop_val) 764ab11af04SChanwoo Choi { 765ab11af04SChanwoo Choi int ret; 766ab11af04SChanwoo Choi 767ab11af04SChanwoo Choi ret = extcon_set_property(edev, id, prop, prop_val); 768ab11af04SChanwoo Choi if (ret < 0) 769ab11af04SChanwoo Choi return ret; 770ab11af04SChanwoo Choi 771ab11af04SChanwoo Choi return extcon_sync(edev, id); 772ab11af04SChanwoo Choi } 773ab11af04SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property_sync); 774ab11af04SChanwoo Choi 775ab11af04SChanwoo Choi /** 7766ab6094fSChanwoo Choi * extcon_get_property_capability() - Get the capability of the property 7776ab6094fSChanwoo Choi * for an external connector. 7786ab6094fSChanwoo Choi * @edev: the extcon device 7796ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 7806ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 7817f2a0a16SChanwoo Choi * 7827f2a0a16SChanwoo Choi * Returns 1 if the property is available or 0 if not available. 7837f2a0a16SChanwoo Choi */ 7847f2a0a16SChanwoo Choi int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, 7857f2a0a16SChanwoo Choi unsigned int prop) 7867f2a0a16SChanwoo Choi { 7877f2a0a16SChanwoo Choi int index; 7887f2a0a16SChanwoo Choi 7897f2a0a16SChanwoo Choi if (!edev) 7907f2a0a16SChanwoo Choi return -EINVAL; 7917f2a0a16SChanwoo Choi 7927f2a0a16SChanwoo Choi /* Check whether the property is supported or not */ 7937f2a0a16SChanwoo Choi if (!is_extcon_property_supported(id, prop)) 7947f2a0a16SChanwoo Choi return -EINVAL; 7957f2a0a16SChanwoo Choi 7967f2a0a16SChanwoo Choi /* Find the cable index of external connector by using id */ 7977f2a0a16SChanwoo Choi index = find_cable_index_by_id(edev, id); 7987f2a0a16SChanwoo Choi if (index < 0) 7997f2a0a16SChanwoo Choi return index; 8007f2a0a16SChanwoo Choi 8017f2a0a16SChanwoo Choi return is_extcon_property_capability(edev, id, index, prop); 8027f2a0a16SChanwoo Choi } 8037f2a0a16SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_property_capability); 8047f2a0a16SChanwoo Choi 8057f2a0a16SChanwoo Choi /** 8066ab6094fSChanwoo Choi * extcon_set_property_capability() - Set the capability of the property 8076ab6094fSChanwoo Choi * for an external connector. 8086ab6094fSChanwoo Choi * @edev: the extcon device 8096ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 8106ab6094fSChanwoo Choi * @prop: the property id indicating an extcon property 8117f2a0a16SChanwoo Choi * 8126ab6094fSChanwoo Choi * Note that this function set the capability of the property 8136ab6094fSChanwoo Choi * for an external connector in order to mark the bit in capability 8146ab6094fSChanwoo Choi * bitmap which mean the available state of the property. 8157f2a0a16SChanwoo Choi * 8166ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 8177f2a0a16SChanwoo Choi */ 8187f2a0a16SChanwoo Choi int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id, 8197f2a0a16SChanwoo Choi unsigned int prop) 8207f2a0a16SChanwoo Choi { 8217f2a0a16SChanwoo Choi struct extcon_cable *cable; 8227f2a0a16SChanwoo Choi int index, type, ret = 0; 8237f2a0a16SChanwoo Choi 8247f2a0a16SChanwoo Choi if (!edev) 8257f2a0a16SChanwoo Choi return -EINVAL; 8267f2a0a16SChanwoo Choi 8277f2a0a16SChanwoo Choi /* Check whether the property is supported or not. */ 8287f2a0a16SChanwoo Choi if (!is_extcon_property_supported(id, prop)) 8297f2a0a16SChanwoo Choi return -EINVAL; 8307f2a0a16SChanwoo Choi 8317f2a0a16SChanwoo Choi /* Find the cable index of external connector by using id. */ 8327f2a0a16SChanwoo Choi index = find_cable_index_by_id(edev, id); 8337f2a0a16SChanwoo Choi if (index < 0) 8347f2a0a16SChanwoo Choi return index; 8357f2a0a16SChanwoo Choi 8367f2a0a16SChanwoo Choi type = get_extcon_type(prop); 8377f2a0a16SChanwoo Choi if (type < 0) 8387f2a0a16SChanwoo Choi return type; 8397f2a0a16SChanwoo Choi 8407f2a0a16SChanwoo Choi cable = &edev->cables[index]; 8417f2a0a16SChanwoo Choi 8427f2a0a16SChanwoo Choi switch (type) { 8437f2a0a16SChanwoo Choi case EXTCON_TYPE_USB: 8447f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); 8457f2a0a16SChanwoo Choi break; 8467f2a0a16SChanwoo Choi case EXTCON_TYPE_CHG: 8477f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); 8487f2a0a16SChanwoo Choi break; 8497f2a0a16SChanwoo Choi case EXTCON_TYPE_JACK: 8507f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); 8517f2a0a16SChanwoo Choi break; 8527f2a0a16SChanwoo Choi case EXTCON_TYPE_DISP: 8537f2a0a16SChanwoo Choi __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); 8547f2a0a16SChanwoo Choi break; 8557f2a0a16SChanwoo Choi default: 8567f2a0a16SChanwoo Choi ret = -EINVAL; 8577f2a0a16SChanwoo Choi } 8587f2a0a16SChanwoo Choi 8597f2a0a16SChanwoo Choi return ret; 8607f2a0a16SChanwoo Choi } 8617f2a0a16SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_set_property_capability); 8627f2a0a16SChanwoo Choi 8637f2a0a16SChanwoo Choi /** 8646ab6094fSChanwoo Choi * extcon_get_extcon_dev() - Get the extcon device instance from the name. 8656ab6094fSChanwoo Choi * @extcon_name: the extcon name provided with extcon_dev_register() 8666ab6094fSChanwoo Choi * 8676ab6094fSChanwoo Choi * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 86858e4a2d2SDan Carpenter * NOTE: This function returns -EPROBE_DEFER so it may only be called from 86958e4a2d2SDan Carpenter * probe() functions. 870f68a8342SChanwoo Choi */ 871f68a8342SChanwoo Choi struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) 872f68a8342SChanwoo Choi { 873f68a8342SChanwoo Choi struct extcon_dev *sd; 874f68a8342SChanwoo Choi 8757eae43aeSChanwoo Choi if (!extcon_name) 8767eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 8777eae43aeSChanwoo Choi 878f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 879f68a8342SChanwoo Choi list_for_each_entry(sd, &extcon_dev_list, entry) { 880f68a8342SChanwoo Choi if (!strcmp(sd->name, extcon_name)) 881f68a8342SChanwoo Choi goto out; 882f68a8342SChanwoo Choi } 88358e4a2d2SDan Carpenter sd = ERR_PTR(-EPROBE_DEFER); 884f68a8342SChanwoo Choi out: 885f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 886f68a8342SChanwoo Choi return sd; 887f68a8342SChanwoo Choi } 888f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); 889f68a8342SChanwoo Choi 890f68a8342SChanwoo Choi /** 8916ab6094fSChanwoo Choi * extcon_register_notifier() - Register a notifier block to get notified by 8926ab6094fSChanwoo Choi * any state changes from the extcon. 8936ab6094fSChanwoo Choi * @edev: the extcon device 8946ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 8956ab6094fSChanwoo Choi * @nb: a notifier block to be registered 896f68a8342SChanwoo Choi * 897f68a8342SChanwoo Choi * Note that the second parameter given to the callback of nb (val) is 8986ab6094fSChanwoo Choi * the current state of an external connector and the third pameter 8996ab6094fSChanwoo Choi * is the pointer of extcon device. 9006ab6094fSChanwoo Choi * 9016ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 902f68a8342SChanwoo Choi */ 90373b6ecdbSChanwoo Choi int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, 904f68a8342SChanwoo Choi struct notifier_block *nb) 905f68a8342SChanwoo Choi { 90666bee35fSHans de Goede unsigned long flags; 9071fa80f18SColin Ian King int ret, idx; 908046050f6SChanwoo Choi 90901b4c9a1SChanwoo Choi if (!edev || !nb) 9107eae43aeSChanwoo Choi return -EINVAL; 9117eae43aeSChanwoo Choi 912046050f6SChanwoo Choi idx = find_cable_index_by_id(edev, id); 913a05f44c8SStephen Boyd if (idx < 0) 914a05f44c8SStephen Boyd return idx; 91566bee35fSHans de Goede 91666bee35fSHans de Goede spin_lock_irqsave(&edev->lock, flags); 917046050f6SChanwoo Choi ret = raw_notifier_chain_register(&edev->nh[idx], nb); 91866bee35fSHans de Goede spin_unlock_irqrestore(&edev->lock, flags); 91966bee35fSHans de Goede 92066bee35fSHans de Goede return ret; 921f68a8342SChanwoo Choi } 922f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_register_notifier); 923f68a8342SChanwoo Choi 924f68a8342SChanwoo Choi /** 9256ab6094fSChanwoo Choi * extcon_unregister_notifier() - Unregister a notifier block from the extcon. 9266ab6094fSChanwoo Choi * @edev: the extcon device 9276ab6094fSChanwoo Choi * @id: the unique id indicating an external connector 9286ab6094fSChanwoo Choi * @nb: a notifier block to be registered 9296ab6094fSChanwoo Choi * 9306ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 931f68a8342SChanwoo Choi */ 93273b6ecdbSChanwoo Choi int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, 933f68a8342SChanwoo Choi struct notifier_block *nb) 934f68a8342SChanwoo Choi { 93566bee35fSHans de Goede unsigned long flags; 936046050f6SChanwoo Choi int ret, idx; 937046050f6SChanwoo Choi 9387eae43aeSChanwoo Choi if (!edev || !nb) 9397eae43aeSChanwoo Choi return -EINVAL; 9407eae43aeSChanwoo Choi 941046050f6SChanwoo Choi idx = find_cable_index_by_id(edev, id); 942a05f44c8SStephen Boyd if (idx < 0) 943a05f44c8SStephen Boyd return idx; 94466bee35fSHans de Goede 94566bee35fSHans de Goede spin_lock_irqsave(&edev->lock, flags); 946046050f6SChanwoo Choi ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); 94766bee35fSHans de Goede spin_unlock_irqrestore(&edev->lock, flags); 94866bee35fSHans de Goede 94966bee35fSHans de Goede return ret; 950f68a8342SChanwoo Choi } 951f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_unregister_notifier); 952f68a8342SChanwoo Choi 953815429b3SChanwoo Choi /** 9546ab6094fSChanwoo Choi * extcon_register_notifier_all() - Register a notifier block for all connectors. 9556ab6094fSChanwoo Choi * @edev: the extcon device 9566ab6094fSChanwoo Choi * @nb: a notifier block to be registered 957815429b3SChanwoo Choi * 9586ab6094fSChanwoo Choi * Note that this function registers a notifier block in order to receive 9596ab6094fSChanwoo Choi * the state change of all supported external connectors from extcon device. 960826a47e9SMarkus Elfring * And the second parameter given to the callback of nb (val) is 9616ab6094fSChanwoo Choi * the current state and the third pameter is the pointer of extcon device. 962815429b3SChanwoo Choi * 9636ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 964815429b3SChanwoo Choi */ 965815429b3SChanwoo Choi int extcon_register_notifier_all(struct extcon_dev *edev, 966815429b3SChanwoo Choi struct notifier_block *nb) 967815429b3SChanwoo Choi { 968815429b3SChanwoo Choi unsigned long flags; 969815429b3SChanwoo Choi int ret; 970815429b3SChanwoo Choi 971815429b3SChanwoo Choi if (!edev || !nb) 972815429b3SChanwoo Choi return -EINVAL; 973815429b3SChanwoo Choi 974815429b3SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 975815429b3SChanwoo Choi ret = raw_notifier_chain_register(&edev->nh_all, nb); 976815429b3SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 977815429b3SChanwoo Choi 978815429b3SChanwoo Choi return ret; 979815429b3SChanwoo Choi } 980815429b3SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_register_notifier_all); 981815429b3SChanwoo Choi 982815429b3SChanwoo Choi /** 983815429b3SChanwoo Choi * extcon_unregister_notifier_all() - Unregister a notifier block from extcon. 9846ab6094fSChanwoo Choi * @edev: the extcon device 9856ab6094fSChanwoo Choi * @nb: a notifier block to be registered 986815429b3SChanwoo Choi * 9876ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 988815429b3SChanwoo Choi */ 989815429b3SChanwoo Choi int extcon_unregister_notifier_all(struct extcon_dev *edev, 990815429b3SChanwoo Choi struct notifier_block *nb) 991815429b3SChanwoo Choi { 992815429b3SChanwoo Choi unsigned long flags; 993815429b3SChanwoo Choi int ret; 994815429b3SChanwoo Choi 995815429b3SChanwoo Choi if (!edev || !nb) 996815429b3SChanwoo Choi return -EINVAL; 997815429b3SChanwoo Choi 998815429b3SChanwoo Choi spin_lock_irqsave(&edev->lock, flags); 999815429b3SChanwoo Choi ret = raw_notifier_chain_unregister(&edev->nh_all, nb); 1000815429b3SChanwoo Choi spin_unlock_irqrestore(&edev->lock, flags); 1001815429b3SChanwoo Choi 1002815429b3SChanwoo Choi return ret; 1003815429b3SChanwoo Choi } 1004815429b3SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_unregister_notifier_all); 1005815429b3SChanwoo Choi 1006f68a8342SChanwoo Choi static struct attribute *extcon_attrs[] = { 1007f68a8342SChanwoo Choi &dev_attr_state.attr, 1008f68a8342SChanwoo Choi &dev_attr_name.attr, 1009f68a8342SChanwoo Choi NULL, 1010f68a8342SChanwoo Choi }; 1011f68a8342SChanwoo Choi ATTRIBUTE_GROUPS(extcon); 1012f68a8342SChanwoo Choi 1013f68a8342SChanwoo Choi static int create_extcon_class(void) 1014f68a8342SChanwoo Choi { 1015*7f4c9bc2SBumwoo Lee if (extcon_class) 1016*7f4c9bc2SBumwoo Lee return 0; 1017*7f4c9bc2SBumwoo Lee 10181aaba11dSGreg Kroah-Hartman extcon_class = class_create("extcon"); 1019f68a8342SChanwoo Choi if (IS_ERR(extcon_class)) 1020f68a8342SChanwoo Choi return PTR_ERR(extcon_class); 1021f68a8342SChanwoo Choi extcon_class->dev_groups = extcon_groups; 1022f68a8342SChanwoo Choi 1023f68a8342SChanwoo Choi return 0; 1024f68a8342SChanwoo Choi } 1025f68a8342SChanwoo Choi 1026f68a8342SChanwoo Choi static void extcon_dev_release(struct device *dev) 1027f68a8342SChanwoo Choi { 1028f68a8342SChanwoo Choi } 1029f68a8342SChanwoo Choi 1030f68a8342SChanwoo Choi static const char *muex_name = "mutually_exclusive"; 1031f68a8342SChanwoo Choi static void dummy_sysfs_dev_release(struct device *dev) 1032f68a8342SChanwoo Choi { 1033f68a8342SChanwoo Choi } 1034f68a8342SChanwoo Choi 1035f68a8342SChanwoo Choi /* 1036f68a8342SChanwoo Choi * extcon_dev_allocate() - Allocate the memory of extcon device. 10376ab6094fSChanwoo Choi * @supported_cable: the array of the supported external connectors 10386ab6094fSChanwoo Choi * ending with EXTCON_NONE. 1039f68a8342SChanwoo Choi * 10406ab6094fSChanwoo Choi * Note that this function allocates the memory for extcon device 10416ab6094fSChanwoo Choi * and initialize default setting for the extcon device. 1042f68a8342SChanwoo Choi * 10436ab6094fSChanwoo Choi * Returns the pointer memory of allocated extcon_dev if success 10446ab6094fSChanwoo Choi * or ERR_PTR(err) if fail. 1045f68a8342SChanwoo Choi */ 104673b6ecdbSChanwoo Choi struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) 1047f68a8342SChanwoo Choi { 1048f68a8342SChanwoo Choi struct extcon_dev *edev; 1049f68a8342SChanwoo Choi 10507eae43aeSChanwoo Choi if (!supported_cable) 10517eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 10527eae43aeSChanwoo Choi 1053f68a8342SChanwoo Choi edev = kzalloc(sizeof(*edev), GFP_KERNEL); 1054f68a8342SChanwoo Choi if (!edev) 1055f68a8342SChanwoo Choi return ERR_PTR(-ENOMEM); 1056f68a8342SChanwoo Choi 1057f68a8342SChanwoo Choi edev->max_supported = 0; 1058f68a8342SChanwoo Choi edev->supported_cable = supported_cable; 1059f68a8342SChanwoo Choi 1060f68a8342SChanwoo Choi return edev; 1061f68a8342SChanwoo Choi } 1062f68a8342SChanwoo Choi 1063f68a8342SChanwoo Choi /* 1064f68a8342SChanwoo Choi * extcon_dev_free() - Free the memory of extcon device. 10656ab6094fSChanwoo Choi * @edev: the extcon device 1066f68a8342SChanwoo Choi */ 1067f68a8342SChanwoo Choi void extcon_dev_free(struct extcon_dev *edev) 1068f68a8342SChanwoo Choi { 1069f68a8342SChanwoo Choi kfree(edev); 1070f68a8342SChanwoo Choi } 1071f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_free); 1072f68a8342SChanwoo Choi 1073f68a8342SChanwoo Choi /** 10746ab6094fSChanwoo Choi * extcon_dev_register() - Register an new extcon device 10756ab6094fSChanwoo Choi * @edev: the extcon device to be registered 1076f68a8342SChanwoo Choi * 1077f68a8342SChanwoo Choi * Among the members of edev struct, please set the "user initializing data" 1078f68a8342SChanwoo Choi * do not set the values of "internal data", which are initialized by 1079f68a8342SChanwoo Choi * this function. 10806ab6094fSChanwoo Choi * 10816ab6094fSChanwoo Choi * Note that before calling this funciton, have to allocate the memory 10826ab6094fSChanwoo Choi * of an extcon device by using the extcon_dev_allocate(). And the extcon 10836ab6094fSChanwoo Choi * dev should include the supported_cable information. 10846ab6094fSChanwoo Choi * 10856ab6094fSChanwoo Choi * Returns 0 if success or error number if fail. 1086f68a8342SChanwoo Choi */ 1087f68a8342SChanwoo Choi int extcon_dev_register(struct extcon_dev *edev) 1088f68a8342SChanwoo Choi { 1089f68a8342SChanwoo Choi int ret, index = 0; 109071c3ffa5SChanwoo Choi static atomic_t edev_no = ATOMIC_INIT(-1); 1091f68a8342SChanwoo Choi 1092f68a8342SChanwoo Choi ret = create_extcon_class(); 1093f68a8342SChanwoo Choi if (ret < 0) 1094f68a8342SChanwoo Choi return ret; 1095f68a8342SChanwoo Choi 10967eae43aeSChanwoo Choi if (!edev || !edev->supported_cable) 10972a9de9c0SChanwoo Choi return -EINVAL; 1098f68a8342SChanwoo Choi 10992a9de9c0SChanwoo Choi for (; edev->supported_cable[index] != EXTCON_NONE; index++); 11002a9de9c0SChanwoo Choi 11012a9de9c0SChanwoo Choi edev->max_supported = index; 1102f68a8342SChanwoo Choi if (index > SUPPORTED_CABLE_MAX) { 11032a9de9c0SChanwoo Choi dev_err(&edev->dev, 11042a9de9c0SChanwoo Choi "exceed the maximum number of supported cables\n"); 1105f68a8342SChanwoo Choi return -EINVAL; 1106f68a8342SChanwoo Choi } 1107f68a8342SChanwoo Choi 1108f68a8342SChanwoo Choi edev->dev.class = extcon_class; 1109f68a8342SChanwoo Choi edev->dev.release = extcon_dev_release; 1110f68a8342SChanwoo Choi 111171c3ffa5SChanwoo Choi edev->name = dev_name(edev->dev.parent); 1112f68a8342SChanwoo Choi if (IS_ERR_OR_NULL(edev->name)) { 1113f68a8342SChanwoo Choi dev_err(&edev->dev, 1114f68a8342SChanwoo Choi "extcon device name is null\n"); 1115f68a8342SChanwoo Choi return -EINVAL; 1116f68a8342SChanwoo Choi } 111771c3ffa5SChanwoo Choi dev_set_name(&edev->dev, "extcon%lu", 111871c3ffa5SChanwoo Choi (unsigned long)atomic_inc_return(&edev_no)); 1119f68a8342SChanwoo Choi 1120f68a8342SChanwoo Choi if (edev->max_supported) { 1121f68a8342SChanwoo Choi char *str; 1122f68a8342SChanwoo Choi struct extcon_cable *cable; 1123f68a8342SChanwoo Choi 11246396bb22SKees Cook edev->cables = kcalloc(edev->max_supported, 11256396bb22SKees Cook sizeof(struct extcon_cable), 11266396bb22SKees Cook GFP_KERNEL); 1127f68a8342SChanwoo Choi if (!edev->cables) { 1128f68a8342SChanwoo Choi ret = -ENOMEM; 1129f68a8342SChanwoo Choi goto err_sysfs_alloc; 1130f68a8342SChanwoo Choi } 1131f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) { 1132f68a8342SChanwoo Choi cable = &edev->cables[index]; 1133f68a8342SChanwoo Choi 113469f75a4fSAndy Shevchenko str = kasprintf(GFP_KERNEL, "cable.%d", index); 1135f68a8342SChanwoo Choi if (!str) { 1136f68a8342SChanwoo Choi for (index--; index >= 0; index--) { 1137f68a8342SChanwoo Choi cable = &edev->cables[index]; 1138f68a8342SChanwoo Choi kfree(cable->attr_g.name); 1139f68a8342SChanwoo Choi } 1140f68a8342SChanwoo Choi ret = -ENOMEM; 1141f68a8342SChanwoo Choi 1142f68a8342SChanwoo Choi goto err_alloc_cables; 1143f68a8342SChanwoo Choi } 1144f68a8342SChanwoo Choi 1145f68a8342SChanwoo Choi cable->edev = edev; 1146f68a8342SChanwoo Choi cable->cable_index = index; 1147f68a8342SChanwoo Choi cable->attrs[0] = &cable->attr_name.attr; 1148f68a8342SChanwoo Choi cable->attrs[1] = &cable->attr_state.attr; 1149f68a8342SChanwoo Choi cable->attrs[2] = NULL; 1150f68a8342SChanwoo Choi cable->attr_g.name = str; 1151f68a8342SChanwoo Choi cable->attr_g.attrs = cable->attrs; 1152f68a8342SChanwoo Choi 1153f68a8342SChanwoo Choi sysfs_attr_init(&cable->attr_name.attr); 1154f68a8342SChanwoo Choi cable->attr_name.attr.name = "name"; 1155f68a8342SChanwoo Choi cable->attr_name.attr.mode = 0444; 1156f68a8342SChanwoo Choi cable->attr_name.show = cable_name_show; 1157f68a8342SChanwoo Choi 1158f68a8342SChanwoo Choi sysfs_attr_init(&cable->attr_state.attr); 1159f68a8342SChanwoo Choi cable->attr_state.attr.name = "state"; 1160f68a8342SChanwoo Choi cable->attr_state.attr.mode = 0444; 1161f68a8342SChanwoo Choi cable->attr_state.show = cable_state_show; 1162f68a8342SChanwoo Choi } 1163f68a8342SChanwoo Choi } 1164f68a8342SChanwoo Choi 1165f68a8342SChanwoo Choi if (edev->max_supported && edev->mutually_exclusive) { 1166f68a8342SChanwoo Choi char *name; 1167f68a8342SChanwoo Choi 1168f68a8342SChanwoo Choi /* Count the size of mutually_exclusive array */ 1169f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) 1170f68a8342SChanwoo Choi ; 1171f68a8342SChanwoo Choi 11726396bb22SKees Cook edev->attrs_muex = kcalloc(index + 1, 11736396bb22SKees Cook sizeof(struct attribute *), 11746396bb22SKees Cook GFP_KERNEL); 1175f68a8342SChanwoo Choi if (!edev->attrs_muex) { 1176f68a8342SChanwoo Choi ret = -ENOMEM; 1177f68a8342SChanwoo Choi goto err_muex; 1178f68a8342SChanwoo Choi } 1179f68a8342SChanwoo Choi 11806396bb22SKees Cook edev->d_attrs_muex = kcalloc(index, 11816396bb22SKees Cook sizeof(struct device_attribute), 11826396bb22SKees Cook GFP_KERNEL); 1183f68a8342SChanwoo Choi if (!edev->d_attrs_muex) { 1184f68a8342SChanwoo Choi ret = -ENOMEM; 1185f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1186f68a8342SChanwoo Choi goto err_muex; 1187f68a8342SChanwoo Choi } 1188f68a8342SChanwoo Choi 1189f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) { 119069f75a4fSAndy Shevchenko name = kasprintf(GFP_KERNEL, "0x%x", 119169f75a4fSAndy Shevchenko edev->mutually_exclusive[index]); 1192f68a8342SChanwoo Choi if (!name) { 1193f68a8342SChanwoo Choi for (index--; index >= 0; index--) { 1194f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr. 1195f68a8342SChanwoo Choi name); 1196f68a8342SChanwoo Choi } 1197f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1198f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1199f68a8342SChanwoo Choi ret = -ENOMEM; 1200f68a8342SChanwoo Choi goto err_muex; 1201f68a8342SChanwoo Choi } 1202f68a8342SChanwoo Choi sysfs_attr_init(&edev->d_attrs_muex[index].attr); 1203f68a8342SChanwoo Choi edev->d_attrs_muex[index].attr.name = name; 1204f68a8342SChanwoo Choi edev->d_attrs_muex[index].attr.mode = 0000; 1205f68a8342SChanwoo Choi edev->attrs_muex[index] = &edev->d_attrs_muex[index] 1206f68a8342SChanwoo Choi .attr; 1207f68a8342SChanwoo Choi } 1208f68a8342SChanwoo Choi edev->attr_g_muex.name = muex_name; 1209f68a8342SChanwoo Choi edev->attr_g_muex.attrs = edev->attrs_muex; 1210f68a8342SChanwoo Choi 1211f68a8342SChanwoo Choi } 1212f68a8342SChanwoo Choi 1213f68a8342SChanwoo Choi if (edev->max_supported) { 1214f68a8342SChanwoo Choi edev->extcon_dev_type.groups = 12156396bb22SKees Cook kcalloc(edev->max_supported + 2, 12166396bb22SKees Cook sizeof(struct attribute_group *), 12176396bb22SKees Cook GFP_KERNEL); 1218f68a8342SChanwoo Choi if (!edev->extcon_dev_type.groups) { 1219f68a8342SChanwoo Choi ret = -ENOMEM; 1220f68a8342SChanwoo Choi goto err_alloc_groups; 1221f68a8342SChanwoo Choi } 1222f68a8342SChanwoo Choi 1223f68a8342SChanwoo Choi edev->extcon_dev_type.name = dev_name(&edev->dev); 1224f68a8342SChanwoo Choi edev->extcon_dev_type.release = dummy_sysfs_dev_release; 1225f68a8342SChanwoo Choi 1226f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1227f68a8342SChanwoo Choi edev->extcon_dev_type.groups[index] = 1228f68a8342SChanwoo Choi &edev->cables[index].attr_g; 1229f68a8342SChanwoo Choi if (edev->mutually_exclusive) 1230f68a8342SChanwoo Choi edev->extcon_dev_type.groups[index] = 1231f68a8342SChanwoo Choi &edev->attr_g_muex; 1232f68a8342SChanwoo Choi 1233f68a8342SChanwoo Choi edev->dev.type = &edev->extcon_dev_type; 1234f68a8342SChanwoo Choi } 1235f68a8342SChanwoo Choi 1236f68a8342SChanwoo Choi spin_lock_init(&edev->lock); 12375dcc2afeSbumwoo lee if (edev->max_supported) { 12385dcc2afeSbumwoo lee edev->nh = kcalloc(edev->max_supported, sizeof(*edev->nh), 12395dcc2afeSbumwoo lee GFP_KERNEL); 1240046050f6SChanwoo Choi if (!edev->nh) { 1241046050f6SChanwoo Choi ret = -ENOMEM; 12425dcc2afeSbumwoo lee goto err_alloc_nh; 12435dcc2afeSbumwoo lee } 1244046050f6SChanwoo Choi } 1245046050f6SChanwoo Choi 1246046050f6SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1247046050f6SChanwoo Choi RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); 1248f68a8342SChanwoo Choi 1249815429b3SChanwoo Choi RAW_INIT_NOTIFIER_HEAD(&edev->nh_all); 1250815429b3SChanwoo Choi 1251f68a8342SChanwoo Choi dev_set_drvdata(&edev->dev, edev); 1252f68a8342SChanwoo Choi edev->state = 0; 1253f68a8342SChanwoo Choi 12545dcc2afeSbumwoo lee ret = device_register(&edev->dev); 12555dcc2afeSbumwoo lee if (ret) { 12565dcc2afeSbumwoo lee put_device(&edev->dev); 12575dcc2afeSbumwoo lee goto err_dev; 12585dcc2afeSbumwoo lee } 12595dcc2afeSbumwoo lee 1260f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 1261f68a8342SChanwoo Choi list_add(&edev->entry, &extcon_dev_list); 1262f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 1263f68a8342SChanwoo Choi 1264f68a8342SChanwoo Choi return 0; 1265f68a8342SChanwoo Choi 1266f68a8342SChanwoo Choi err_dev: 1267f68a8342SChanwoo Choi if (edev->max_supported) 12685dcc2afeSbumwoo lee kfree(edev->nh); 12695dcc2afeSbumwoo lee err_alloc_nh: 12705dcc2afeSbumwoo lee if (edev->max_supported) 1271f68a8342SChanwoo Choi kfree(edev->extcon_dev_type.groups); 1272f68a8342SChanwoo Choi err_alloc_groups: 1273f68a8342SChanwoo Choi if (edev->max_supported && edev->mutually_exclusive) { 1274f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; index++) 1275f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr.name); 1276f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1277f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1278f68a8342SChanwoo Choi } 1279f68a8342SChanwoo Choi err_muex: 1280f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1281f68a8342SChanwoo Choi kfree(edev->cables[index].attr_g.name); 1282f68a8342SChanwoo Choi err_alloc_cables: 1283f68a8342SChanwoo Choi if (edev->max_supported) 1284f68a8342SChanwoo Choi kfree(edev->cables); 1285f68a8342SChanwoo Choi err_sysfs_alloc: 1286f68a8342SChanwoo Choi return ret; 1287f68a8342SChanwoo Choi } 1288f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_register); 1289f68a8342SChanwoo Choi 1290f68a8342SChanwoo Choi /** 1291f68a8342SChanwoo Choi * extcon_dev_unregister() - Unregister the extcon device. 12926ab6094fSChanwoo Choi * @edev: the extcon device to be unregistered. 1293f68a8342SChanwoo Choi * 1294f68a8342SChanwoo Choi * Note that this does not call kfree(edev) because edev was not allocated 1295f68a8342SChanwoo Choi * by this class. 1296f68a8342SChanwoo Choi */ 1297f68a8342SChanwoo Choi void extcon_dev_unregister(struct extcon_dev *edev) 1298f68a8342SChanwoo Choi { 1299f68a8342SChanwoo Choi int index; 1300f68a8342SChanwoo Choi 13017eae43aeSChanwoo Choi if (!edev) 13027eae43aeSChanwoo Choi return; 13037eae43aeSChanwoo Choi 1304f68a8342SChanwoo Choi mutex_lock(&extcon_dev_list_lock); 1305f68a8342SChanwoo Choi list_del(&edev->entry); 1306f68a8342SChanwoo Choi mutex_unlock(&extcon_dev_list_lock); 1307f68a8342SChanwoo Choi 1308f68a8342SChanwoo Choi if (IS_ERR_OR_NULL(get_device(&edev->dev))) { 1309f68a8342SChanwoo Choi dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", 1310f68a8342SChanwoo Choi dev_name(&edev->dev)); 1311f68a8342SChanwoo Choi return; 1312f68a8342SChanwoo Choi } 1313f68a8342SChanwoo Choi 1314f68a8342SChanwoo Choi device_unregister(&edev->dev); 1315f68a8342SChanwoo Choi 1316f68a8342SChanwoo Choi if (edev->mutually_exclusive && edev->max_supported) { 1317f68a8342SChanwoo Choi for (index = 0; edev->mutually_exclusive[index]; 1318f68a8342SChanwoo Choi index++) 1319f68a8342SChanwoo Choi kfree(edev->d_attrs_muex[index].attr.name); 1320f68a8342SChanwoo Choi kfree(edev->d_attrs_muex); 1321f68a8342SChanwoo Choi kfree(edev->attrs_muex); 1322f68a8342SChanwoo Choi } 1323f68a8342SChanwoo Choi 1324f68a8342SChanwoo Choi for (index = 0; index < edev->max_supported; index++) 1325f68a8342SChanwoo Choi kfree(edev->cables[index].attr_g.name); 1326f68a8342SChanwoo Choi 1327f68a8342SChanwoo Choi if (edev->max_supported) { 1328f68a8342SChanwoo Choi kfree(edev->extcon_dev_type.groups); 1329f68a8342SChanwoo Choi kfree(edev->cables); 13305dcc2afeSbumwoo lee kfree(edev->nh); 1331f68a8342SChanwoo Choi } 1332f68a8342SChanwoo Choi 1333f68a8342SChanwoo Choi put_device(&edev->dev); 1334f68a8342SChanwoo Choi } 1335f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_dev_unregister); 1336f68a8342SChanwoo Choi 1337f68a8342SChanwoo Choi #ifdef CONFIG_OF 1338370ed7a9SAndrzej Hajda 1339370ed7a9SAndrzej Hajda /* 1340370ed7a9SAndrzej Hajda * extcon_find_edev_by_node - Find the extcon device from devicetree. 1341370ed7a9SAndrzej Hajda * @node : OF node identifying edev 1342370ed7a9SAndrzej Hajda * 1343370ed7a9SAndrzej Hajda * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1344370ed7a9SAndrzej Hajda */ 1345370ed7a9SAndrzej Hajda struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1346370ed7a9SAndrzej Hajda { 1347370ed7a9SAndrzej Hajda struct extcon_dev *edev; 1348370ed7a9SAndrzej Hajda 1349370ed7a9SAndrzej Hajda mutex_lock(&extcon_dev_list_lock); 1350370ed7a9SAndrzej Hajda list_for_each_entry(edev, &extcon_dev_list, entry) 1351370ed7a9SAndrzej Hajda if (edev->dev.parent && edev->dev.parent->of_node == node) 1352370ed7a9SAndrzej Hajda goto out; 1353370ed7a9SAndrzej Hajda edev = ERR_PTR(-EPROBE_DEFER); 1354370ed7a9SAndrzej Hajda out: 1355370ed7a9SAndrzej Hajda mutex_unlock(&extcon_dev_list_lock); 1356370ed7a9SAndrzej Hajda 1357370ed7a9SAndrzej Hajda return edev; 1358370ed7a9SAndrzej Hajda } 1359370ed7a9SAndrzej Hajda 1360f68a8342SChanwoo Choi /* 13616ab6094fSChanwoo Choi * extcon_get_edev_by_phandle - Get the extcon device from devicetree. 13626ab6094fSChanwoo Choi * @dev : the instance to the given device 13636ab6094fSChanwoo Choi * @index : the index into list of extcon_dev 1364f68a8342SChanwoo Choi * 13656ab6094fSChanwoo Choi * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1366f68a8342SChanwoo Choi */ 1367f68a8342SChanwoo Choi struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1368f68a8342SChanwoo Choi { 1369f68a8342SChanwoo Choi struct device_node *node; 1370f68a8342SChanwoo Choi struct extcon_dev *edev; 1371f68a8342SChanwoo Choi 13727eae43aeSChanwoo Choi if (!dev) 13737eae43aeSChanwoo Choi return ERR_PTR(-EINVAL); 13747eae43aeSChanwoo Choi 1375f68a8342SChanwoo Choi if (!dev->of_node) { 1376e8752b7aSStephen Boyd dev_dbg(dev, "device does not have a device node entry\n"); 1377f68a8342SChanwoo Choi return ERR_PTR(-EINVAL); 1378f68a8342SChanwoo Choi } 1379f68a8342SChanwoo Choi 1380f68a8342SChanwoo Choi node = of_parse_phandle(dev->of_node, "extcon", index); 1381f68a8342SChanwoo Choi if (!node) { 13825c27036dSRob Herring dev_dbg(dev, "failed to get phandle in %pOF node\n", 13835c27036dSRob Herring dev->of_node); 1384f68a8342SChanwoo Choi return ERR_PTR(-ENODEV); 1385f68a8342SChanwoo Choi } 1386f68a8342SChanwoo Choi 1387370ed7a9SAndrzej Hajda edev = extcon_find_edev_by_node(node); 13885d5c4c13SPeter Chen of_node_put(node); 1389f68a8342SChanwoo Choi 1390370ed7a9SAndrzej Hajda return edev; 1391f68a8342SChanwoo Choi } 1392370ed7a9SAndrzej Hajda 1393f68a8342SChanwoo Choi #else 1394370ed7a9SAndrzej Hajda 1395370ed7a9SAndrzej Hajda struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1396370ed7a9SAndrzej Hajda { 1397370ed7a9SAndrzej Hajda return ERR_PTR(-ENOSYS); 1398370ed7a9SAndrzej Hajda } 1399370ed7a9SAndrzej Hajda 1400f68a8342SChanwoo Choi struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1401f68a8342SChanwoo Choi { 1402f68a8342SChanwoo Choi return ERR_PTR(-ENOSYS); 1403f68a8342SChanwoo Choi } 1404370ed7a9SAndrzej Hajda 1405f68a8342SChanwoo Choi #endif /* CONFIG_OF */ 1406370ed7a9SAndrzej Hajda 1407370ed7a9SAndrzej Hajda EXPORT_SYMBOL_GPL(extcon_find_edev_by_node); 1408f68a8342SChanwoo Choi EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); 1409f68a8342SChanwoo Choi 1410707d7550SChanwoo Choi /** 1411707d7550SChanwoo Choi * extcon_get_edev_name() - Get the name of the extcon device. 1412707d7550SChanwoo Choi * @edev: the extcon device 1413707d7550SChanwoo Choi */ 1414707d7550SChanwoo Choi const char *extcon_get_edev_name(struct extcon_dev *edev) 1415707d7550SChanwoo Choi { 1416707d7550SChanwoo Choi return !edev ? NULL : edev->name; 1417707d7550SChanwoo Choi } 1418995bb109SMayank Rana EXPORT_SYMBOL_GPL(extcon_get_edev_name); 1419707d7550SChanwoo Choi 1420f68a8342SChanwoo Choi static int __init extcon_class_init(void) 1421f68a8342SChanwoo Choi { 1422f68a8342SChanwoo Choi return create_extcon_class(); 1423f68a8342SChanwoo Choi } 1424f68a8342SChanwoo Choi module_init(extcon_class_init); 1425f68a8342SChanwoo Choi 1426f68a8342SChanwoo Choi static void __exit extcon_class_exit(void) 1427f68a8342SChanwoo Choi { 1428f68a8342SChanwoo Choi class_destroy(extcon_class); 1429f68a8342SChanwoo Choi } 1430f68a8342SChanwoo Choi module_exit(extcon_class_exit); 1431f68a8342SChanwoo Choi 14322a9de9c0SChanwoo Choi MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 1433f68a8342SChanwoo Choi MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); 14346ab6094fSChanwoo Choi MODULE_DESCRIPTION("External Connector (extcon) framework"); 14356ab6094fSChanwoo Choi MODULE_LICENSE("GPL v2"); 1436