15fd54aceSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0+ 2cedf8602SSascha Hauer /* 3cedf8602SSascha Hauer * phy.c -- USB phy handling 4cedf8602SSascha Hauer * 5cedf8602SSascha Hauer * Copyright (C) 2004-2013 Texas Instruments 6cedf8602SSascha Hauer */ 7cedf8602SSascha Hauer #include <linux/kernel.h> 8cedf8602SSascha Hauer #include <linux/export.h> 9cedf8602SSascha Hauer #include <linux/err.h> 10cedf8602SSascha Hauer #include <linux/device.h> 11cedf8602SSascha Hauer #include <linux/module.h> 12cedf8602SSascha Hauer #include <linux/slab.h> 13cedf8602SSascha Hauer #include <linux/of.h> 14cedf8602SSascha Hauer 15cedf8602SSascha Hauer #include <linux/usb/phy.h> 16cedf8602SSascha Hauer 17a9081a00SBaolin Wang /* Default current range by charger type. */ 18a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MIN 2 19a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MAX 500 20a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MIN_SS 150 21a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MAX_SS 900 22a9081a00SBaolin Wang #define DEFAULT_DCP_CUR_MIN 500 23a9081a00SBaolin Wang #define DEFAULT_DCP_CUR_MAX 5000 24a9081a00SBaolin Wang #define DEFAULT_CDP_CUR_MIN 1500 25a9081a00SBaolin Wang #define DEFAULT_CDP_CUR_MAX 5000 26a9081a00SBaolin Wang #define DEFAULT_ACA_CUR_MIN 1500 27a9081a00SBaolin Wang #define DEFAULT_ACA_CUR_MAX 5000 28a9081a00SBaolin Wang 29cedf8602SSascha Hauer static LIST_HEAD(phy_list); 30cedf8602SSascha Hauer static DEFINE_SPINLOCK(phy_lock); 31cedf8602SSascha Hauer 32e842b84cSNeilBrown struct phy_devm { 33e842b84cSNeilBrown struct usb_phy *phy; 34e842b84cSNeilBrown struct notifier_block *nb; 35e842b84cSNeilBrown }; 36e842b84cSNeilBrown 373bdcfe6cSPeter Chen static const char *const usb_chger_type[] = { 383bdcfe6cSPeter Chen [UNKNOWN_TYPE] = "USB_CHARGER_UNKNOWN_TYPE", 393bdcfe6cSPeter Chen [SDP_TYPE] = "USB_CHARGER_SDP_TYPE", 403bdcfe6cSPeter Chen [CDP_TYPE] = "USB_CHARGER_CDP_TYPE", 413bdcfe6cSPeter Chen [DCP_TYPE] = "USB_CHARGER_DCP_TYPE", 423bdcfe6cSPeter Chen [ACA_TYPE] = "USB_CHARGER_ACA_TYPE", 433bdcfe6cSPeter Chen }; 443bdcfe6cSPeter Chen 45cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy(struct list_head *list, 46cedf8602SSascha Hauer enum usb_phy_type type) 47cedf8602SSascha Hauer { 48cedf8602SSascha Hauer struct usb_phy *phy = NULL; 49cedf8602SSascha Hauer 50cedf8602SSascha Hauer list_for_each_entry(phy, list, head) { 51cedf8602SSascha Hauer if (phy->type != type) 52cedf8602SSascha Hauer continue; 53cedf8602SSascha Hauer 54cedf8602SSascha Hauer return phy; 55cedf8602SSascha Hauer } 56cedf8602SSascha Hauer 570df8fc37SHeikki Krogerus return ERR_PTR(-ENODEV); 58cedf8602SSascha Hauer } 59cedf8602SSascha Hauer 60cedf8602SSascha Hauer static struct usb_phy *__of_usb_find_phy(struct device_node *node) 61cedf8602SSascha Hauer { 62cedf8602SSascha Hauer struct usb_phy *phy; 63cedf8602SSascha Hauer 64c818a94cSThierry Reding if (!of_device_is_available(node)) 65c818a94cSThierry Reding return ERR_PTR(-ENODEV); 66c818a94cSThierry Reding 67cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 68cedf8602SSascha Hauer if (node != phy->dev->of_node) 69cedf8602SSascha Hauer continue; 70cedf8602SSascha Hauer 71cedf8602SSascha Hauer return phy; 72cedf8602SSascha Hauer } 73cedf8602SSascha Hauer 749c9d8249SMaxime Ripard return ERR_PTR(-EPROBE_DEFER); 75cedf8602SSascha Hauer } 76cedf8602SSascha Hauer 77a9081a00SBaolin Wang static void usb_phy_set_default_current(struct usb_phy *usb_phy) 78a9081a00SBaolin Wang { 79a9081a00SBaolin Wang usb_phy->chg_cur.sdp_min = DEFAULT_SDP_CUR_MIN; 80a9081a00SBaolin Wang usb_phy->chg_cur.sdp_max = DEFAULT_SDP_CUR_MAX; 81a9081a00SBaolin Wang usb_phy->chg_cur.dcp_min = DEFAULT_DCP_CUR_MIN; 82a9081a00SBaolin Wang usb_phy->chg_cur.dcp_max = DEFAULT_DCP_CUR_MAX; 83a9081a00SBaolin Wang usb_phy->chg_cur.cdp_min = DEFAULT_CDP_CUR_MIN; 84a9081a00SBaolin Wang usb_phy->chg_cur.cdp_max = DEFAULT_CDP_CUR_MAX; 85a9081a00SBaolin Wang usb_phy->chg_cur.aca_min = DEFAULT_ACA_CUR_MIN; 86a9081a00SBaolin Wang usb_phy->chg_cur.aca_max = DEFAULT_ACA_CUR_MAX; 87a9081a00SBaolin Wang } 88a9081a00SBaolin Wang 89a9081a00SBaolin Wang /** 90a9081a00SBaolin Wang * usb_phy_notify_charger_work - notify the USB charger state 91a9081a00SBaolin Wang * @work - the charger work to notify the USB charger state 92a9081a00SBaolin Wang * 93a9081a00SBaolin Wang * This work can be issued when USB charger state has been changed or 94a9081a00SBaolin Wang * USB charger current has been changed, then we can notify the current 95a9081a00SBaolin Wang * what can be drawn to power user and the charger state to userspace. 96a9081a00SBaolin Wang * 97a9081a00SBaolin Wang * If we get the charger type from extcon subsystem, we can notify the 98a9081a00SBaolin Wang * charger state to power user automatically by usb_phy_get_charger_type() 99a9081a00SBaolin Wang * issuing from extcon subsystem. 100a9081a00SBaolin Wang * 101a9081a00SBaolin Wang * If we get the charger type from ->charger_detect() instead of extcon 102a9081a00SBaolin Wang * subsystem, the usb phy driver should issue usb_phy_set_charger_state() 103a9081a00SBaolin Wang * to set charger state when the charger state has been changed. 104a9081a00SBaolin Wang */ 105a9081a00SBaolin Wang static void usb_phy_notify_charger_work(struct work_struct *work) 106a9081a00SBaolin Wang { 107a9081a00SBaolin Wang struct usb_phy *usb_phy = container_of(work, struct usb_phy, chg_work); 108a9081a00SBaolin Wang char uchger_state[50] = { 0 }; 1093bdcfe6cSPeter Chen char uchger_type[50] = { 0 }; 1103bdcfe6cSPeter Chen char *envp[] = { uchger_state, uchger_type, NULL }; 111a9081a00SBaolin Wang unsigned int min, max; 112a9081a00SBaolin Wang 113a9081a00SBaolin Wang switch (usb_phy->chg_state) { 114a9081a00SBaolin Wang case USB_CHARGER_PRESENT: 115a9081a00SBaolin Wang usb_phy_get_charger_current(usb_phy, &min, &max); 116a9081a00SBaolin Wang 117a9081a00SBaolin Wang atomic_notifier_call_chain(&usb_phy->notifier, max, usb_phy); 118a9081a00SBaolin Wang snprintf(uchger_state, ARRAY_SIZE(uchger_state), 119a9081a00SBaolin Wang "USB_CHARGER_STATE=%s", "USB_CHARGER_PRESENT"); 120a9081a00SBaolin Wang break; 121a9081a00SBaolin Wang case USB_CHARGER_ABSENT: 122a9081a00SBaolin Wang usb_phy_set_default_current(usb_phy); 123a9081a00SBaolin Wang 124a9081a00SBaolin Wang atomic_notifier_call_chain(&usb_phy->notifier, 0, usb_phy); 125a9081a00SBaolin Wang snprintf(uchger_state, ARRAY_SIZE(uchger_state), 126a9081a00SBaolin Wang "USB_CHARGER_STATE=%s", "USB_CHARGER_ABSENT"); 127a9081a00SBaolin Wang break; 128a9081a00SBaolin Wang default: 129a9081a00SBaolin Wang dev_warn(usb_phy->dev, "Unknown USB charger state: %d\n", 130a9081a00SBaolin Wang usb_phy->chg_state); 131a9081a00SBaolin Wang return; 132a9081a00SBaolin Wang } 133a9081a00SBaolin Wang 1343bdcfe6cSPeter Chen snprintf(uchger_type, ARRAY_SIZE(uchger_type), 1353bdcfe6cSPeter Chen "USB_CHARGER_TYPE=%s", usb_chger_type[usb_phy->chg_type]); 136a9081a00SBaolin Wang kobject_uevent_env(&usb_phy->dev->kobj, KOBJ_CHANGE, envp); 137a9081a00SBaolin Wang } 138a9081a00SBaolin Wang 139a9081a00SBaolin Wang static void __usb_phy_get_charger_type(struct usb_phy *usb_phy) 140a9081a00SBaolin Wang { 141a9081a00SBaolin Wang if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_SDP) > 0) { 142a9081a00SBaolin Wang usb_phy->chg_type = SDP_TYPE; 143a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 144a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_CDP) > 0) { 145a9081a00SBaolin Wang usb_phy->chg_type = CDP_TYPE; 146a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 147a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_DCP) > 0) { 148a9081a00SBaolin Wang usb_phy->chg_type = DCP_TYPE; 149a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 150a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_ACA) > 0) { 151a9081a00SBaolin Wang usb_phy->chg_type = ACA_TYPE; 152a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 153a9081a00SBaolin Wang } else { 154a9081a00SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 155a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_ABSENT; 156a9081a00SBaolin Wang } 157a9081a00SBaolin Wang 158a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 159a9081a00SBaolin Wang } 160a9081a00SBaolin Wang 161a9081a00SBaolin Wang /** 162a9081a00SBaolin Wang * usb_phy_get_charger_type - get charger type from extcon subsystem 163a9081a00SBaolin Wang * @nb -the notifier block to determine charger type 164a9081a00SBaolin Wang * @state - the cable state 165a9081a00SBaolin Wang * @data - private data 166a9081a00SBaolin Wang * 167a9081a00SBaolin Wang * Determin the charger type from extcon subsystem which also means the 168a9081a00SBaolin Wang * charger state has been chaned, then we should notify this event. 169a9081a00SBaolin Wang */ 170a9081a00SBaolin Wang static int usb_phy_get_charger_type(struct notifier_block *nb, 171a9081a00SBaolin Wang unsigned long state, void *data) 172a9081a00SBaolin Wang { 173a9081a00SBaolin Wang struct usb_phy *usb_phy = container_of(nb, struct usb_phy, type_nb); 174a9081a00SBaolin Wang 175a9081a00SBaolin Wang __usb_phy_get_charger_type(usb_phy); 176a9081a00SBaolin Wang return NOTIFY_OK; 177a9081a00SBaolin Wang } 178a9081a00SBaolin Wang 179a9081a00SBaolin Wang /** 180a9081a00SBaolin Wang * usb_phy_set_charger_current - set the USB charger current 181a9081a00SBaolin Wang * @usb_phy - the USB phy to be used 182a9081a00SBaolin Wang * @mA - the current need to be set 183a9081a00SBaolin Wang * 184a9081a00SBaolin Wang * Usually we only change the charger default current when USB finished the 185a9081a00SBaolin Wang * enumeration as one SDP charger. As one SDP charger, usb_phy_set_power() 186a9081a00SBaolin Wang * will issue this function to change charger current when after setting USB 187a9081a00SBaolin Wang * configuration, or suspend/resume USB. For other type charger, we should 188a9081a00SBaolin Wang * use the default charger current and we do not suggest to issue this function 189a9081a00SBaolin Wang * to change the charger current. 190a9081a00SBaolin Wang * 191a9081a00SBaolin Wang * When USB charger current has been changed, we need to notify the power users. 192a9081a00SBaolin Wang */ 193a9081a00SBaolin Wang void usb_phy_set_charger_current(struct usb_phy *usb_phy, unsigned int mA) 194a9081a00SBaolin Wang { 195a9081a00SBaolin Wang switch (usb_phy->chg_type) { 196a9081a00SBaolin Wang case SDP_TYPE: 197a9081a00SBaolin Wang if (usb_phy->chg_cur.sdp_max == mA) 198a9081a00SBaolin Wang return; 199a9081a00SBaolin Wang 200a9081a00SBaolin Wang usb_phy->chg_cur.sdp_max = (mA > DEFAULT_SDP_CUR_MAX_SS) ? 201a9081a00SBaolin Wang DEFAULT_SDP_CUR_MAX_SS : mA; 202a9081a00SBaolin Wang break; 203a9081a00SBaolin Wang case DCP_TYPE: 204a9081a00SBaolin Wang if (usb_phy->chg_cur.dcp_max == mA) 205a9081a00SBaolin Wang return; 206a9081a00SBaolin Wang 207a9081a00SBaolin Wang usb_phy->chg_cur.dcp_max = (mA > DEFAULT_DCP_CUR_MAX) ? 208a9081a00SBaolin Wang DEFAULT_DCP_CUR_MAX : mA; 209a9081a00SBaolin Wang break; 210a9081a00SBaolin Wang case CDP_TYPE: 211a9081a00SBaolin Wang if (usb_phy->chg_cur.cdp_max == mA) 212a9081a00SBaolin Wang return; 213a9081a00SBaolin Wang 214a9081a00SBaolin Wang usb_phy->chg_cur.cdp_max = (mA > DEFAULT_CDP_CUR_MAX) ? 215a9081a00SBaolin Wang DEFAULT_CDP_CUR_MAX : mA; 216a9081a00SBaolin Wang break; 217a9081a00SBaolin Wang case ACA_TYPE: 218a9081a00SBaolin Wang if (usb_phy->chg_cur.aca_max == mA) 219a9081a00SBaolin Wang return; 220a9081a00SBaolin Wang 221a9081a00SBaolin Wang usb_phy->chg_cur.aca_max = (mA > DEFAULT_ACA_CUR_MAX) ? 222a9081a00SBaolin Wang DEFAULT_ACA_CUR_MAX : mA; 223a9081a00SBaolin Wang break; 224a9081a00SBaolin Wang default: 225a9081a00SBaolin Wang return; 226a9081a00SBaolin Wang } 227a9081a00SBaolin Wang 228a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 229a9081a00SBaolin Wang } 230a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_set_charger_current); 231a9081a00SBaolin Wang 232a9081a00SBaolin Wang /** 233a9081a00SBaolin Wang * usb_phy_get_charger_current - get the USB charger current 234a9081a00SBaolin Wang * @usb_phy - the USB phy to be used 235a9081a00SBaolin Wang * @min - the minimum current 236a9081a00SBaolin Wang * @max - the maximum current 237a9081a00SBaolin Wang * 238a9081a00SBaolin Wang * Usually we will notify the maximum current to power user, but for some 239a9081a00SBaolin Wang * special case, power user also need the minimum current value. Then the 240a9081a00SBaolin Wang * power user can issue this function to get the suitable current. 241a9081a00SBaolin Wang */ 242a9081a00SBaolin Wang void usb_phy_get_charger_current(struct usb_phy *usb_phy, 243a9081a00SBaolin Wang unsigned int *min, unsigned int *max) 244a9081a00SBaolin Wang { 245a9081a00SBaolin Wang switch (usb_phy->chg_type) { 246a9081a00SBaolin Wang case SDP_TYPE: 247a9081a00SBaolin Wang *min = usb_phy->chg_cur.sdp_min; 248a9081a00SBaolin Wang *max = usb_phy->chg_cur.sdp_max; 249a9081a00SBaolin Wang break; 250a9081a00SBaolin Wang case DCP_TYPE: 251a9081a00SBaolin Wang *min = usb_phy->chg_cur.dcp_min; 252a9081a00SBaolin Wang *max = usb_phy->chg_cur.dcp_max; 253a9081a00SBaolin Wang break; 254a9081a00SBaolin Wang case CDP_TYPE: 255a9081a00SBaolin Wang *min = usb_phy->chg_cur.cdp_min; 256a9081a00SBaolin Wang *max = usb_phy->chg_cur.cdp_max; 257a9081a00SBaolin Wang break; 258a9081a00SBaolin Wang case ACA_TYPE: 259a9081a00SBaolin Wang *min = usb_phy->chg_cur.aca_min; 260a9081a00SBaolin Wang *max = usb_phy->chg_cur.aca_max; 261a9081a00SBaolin Wang break; 262a9081a00SBaolin Wang default: 263a9081a00SBaolin Wang *min = 0; 264a9081a00SBaolin Wang *max = 0; 265a9081a00SBaolin Wang break; 266a9081a00SBaolin Wang } 267a9081a00SBaolin Wang } 268a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_get_charger_current); 269a9081a00SBaolin Wang 270a9081a00SBaolin Wang /** 271a9081a00SBaolin Wang * usb_phy_set_charger_state - set the USB charger state 272a9081a00SBaolin Wang * @usb_phy - the USB phy to be used 273a9081a00SBaolin Wang * @state - the new state need to be set for charger 274a9081a00SBaolin Wang * 275a9081a00SBaolin Wang * The usb phy driver can issue this function when the usb phy driver 276a9081a00SBaolin Wang * detected the charger state has been changed, in this case the charger 277a9081a00SBaolin Wang * type should be get from ->charger_detect(). 278a9081a00SBaolin Wang */ 279a9081a00SBaolin Wang void usb_phy_set_charger_state(struct usb_phy *usb_phy, 280a9081a00SBaolin Wang enum usb_charger_state state) 281a9081a00SBaolin Wang { 282a9081a00SBaolin Wang if (usb_phy->chg_state == state || !usb_phy->charger_detect) 283a9081a00SBaolin Wang return; 284a9081a00SBaolin Wang 285a9081a00SBaolin Wang usb_phy->chg_state = state; 286a9081a00SBaolin Wang if (usb_phy->chg_state == USB_CHARGER_PRESENT) 287a9081a00SBaolin Wang usb_phy->chg_type = usb_phy->charger_detect(usb_phy); 288a9081a00SBaolin Wang else 289a9081a00SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 290a9081a00SBaolin Wang 291a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 292a9081a00SBaolin Wang } 293a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_set_charger_state); 294a9081a00SBaolin Wang 295cedf8602SSascha Hauer static void devm_usb_phy_release(struct device *dev, void *res) 296cedf8602SSascha Hauer { 297cedf8602SSascha Hauer struct usb_phy *phy = *(struct usb_phy **)res; 298cedf8602SSascha Hauer 299cedf8602SSascha Hauer usb_put_phy(phy); 300cedf8602SSascha Hauer } 301cedf8602SSascha Hauer 302e842b84cSNeilBrown static void devm_usb_phy_release2(struct device *dev, void *_res) 303e842b84cSNeilBrown { 304e842b84cSNeilBrown struct phy_devm *res = _res; 305e842b84cSNeilBrown 306e842b84cSNeilBrown if (res->nb) 307e842b84cSNeilBrown usb_unregister_notifier(res->phy, res->nb); 308e842b84cSNeilBrown usb_put_phy(res->phy); 309e842b84cSNeilBrown } 310e842b84cSNeilBrown 311cedf8602SSascha Hauer static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) 312cedf8602SSascha Hauer { 313869aee0fSAxel Lin struct usb_phy **phy = res; 314869aee0fSAxel Lin 315869aee0fSAxel Lin return *phy == match_data; 316cedf8602SSascha Hauer } 317cedf8602SSascha Hauer 318655283a7SBaolin Wang static void usb_charger_init(struct usb_phy *usb_phy) 319655283a7SBaolin Wang { 320655283a7SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 321655283a7SBaolin Wang usb_phy->chg_state = USB_CHARGER_DEFAULT; 322655283a7SBaolin Wang usb_phy_set_default_current(usb_phy); 323655283a7SBaolin Wang INIT_WORK(&usb_phy->chg_work, usb_phy_notify_charger_work); 324655283a7SBaolin Wang } 325655283a7SBaolin Wang 3267d21114dSBaolin Wang static int usb_add_extcon(struct usb_phy *x) 3277d21114dSBaolin Wang { 3287d21114dSBaolin Wang int ret; 3297d21114dSBaolin Wang 3307d21114dSBaolin Wang if (of_property_read_bool(x->dev->of_node, "extcon")) { 3317d21114dSBaolin Wang x->edev = extcon_get_edev_by_phandle(x->dev, 0); 3327d21114dSBaolin Wang if (IS_ERR(x->edev)) 3337d21114dSBaolin Wang return PTR_ERR(x->edev); 3347d21114dSBaolin Wang 3357d21114dSBaolin Wang x->id_edev = extcon_get_edev_by_phandle(x->dev, 1); 3367d21114dSBaolin Wang if (IS_ERR(x->id_edev)) { 3377d21114dSBaolin Wang x->id_edev = NULL; 3387d21114dSBaolin Wang dev_info(x->dev, "No separate ID extcon device\n"); 3397d21114dSBaolin Wang } 3407d21114dSBaolin Wang 3417d21114dSBaolin Wang if (x->vbus_nb.notifier_call) { 3427d21114dSBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 3437d21114dSBaolin Wang EXTCON_USB, 3447d21114dSBaolin Wang &x->vbus_nb); 3457d21114dSBaolin Wang if (ret < 0) { 3467d21114dSBaolin Wang dev_err(x->dev, 3477d21114dSBaolin Wang "register VBUS notifier failed\n"); 3487d21114dSBaolin Wang return ret; 3497d21114dSBaolin Wang } 350a9081a00SBaolin Wang } else { 351a9081a00SBaolin Wang x->type_nb.notifier_call = usb_phy_get_charger_type; 352a9081a00SBaolin Wang 353a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 354a9081a00SBaolin Wang EXTCON_CHG_USB_SDP, 355a9081a00SBaolin Wang &x->type_nb); 356a9081a00SBaolin Wang if (ret) { 357a9081a00SBaolin Wang dev_err(x->dev, 358a9081a00SBaolin Wang "register extcon USB SDP failed.\n"); 359a9081a00SBaolin Wang return ret; 360a9081a00SBaolin Wang } 361a9081a00SBaolin Wang 362a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 363a9081a00SBaolin Wang EXTCON_CHG_USB_CDP, 364a9081a00SBaolin Wang &x->type_nb); 365a9081a00SBaolin Wang if (ret) { 366a9081a00SBaolin Wang dev_err(x->dev, 367a9081a00SBaolin Wang "register extcon USB CDP failed.\n"); 368a9081a00SBaolin Wang return ret; 369a9081a00SBaolin Wang } 370a9081a00SBaolin Wang 371a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 372a9081a00SBaolin Wang EXTCON_CHG_USB_DCP, 373a9081a00SBaolin Wang &x->type_nb); 374a9081a00SBaolin Wang if (ret) { 375a9081a00SBaolin Wang dev_err(x->dev, 376a9081a00SBaolin Wang "register extcon USB DCP failed.\n"); 377a9081a00SBaolin Wang return ret; 378a9081a00SBaolin Wang } 379a9081a00SBaolin Wang 380a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 381a9081a00SBaolin Wang EXTCON_CHG_USB_ACA, 382a9081a00SBaolin Wang &x->type_nb); 383a9081a00SBaolin Wang if (ret) { 384a9081a00SBaolin Wang dev_err(x->dev, 385a9081a00SBaolin Wang "register extcon USB ACA failed.\n"); 386a9081a00SBaolin Wang return ret; 387a9081a00SBaolin Wang } 3887d21114dSBaolin Wang } 3897d21114dSBaolin Wang 3907d21114dSBaolin Wang if (x->id_nb.notifier_call) { 3917d21114dSBaolin Wang struct extcon_dev *id_ext; 3927d21114dSBaolin Wang 3937d21114dSBaolin Wang if (x->id_edev) 3947d21114dSBaolin Wang id_ext = x->id_edev; 3957d21114dSBaolin Wang else 3967d21114dSBaolin Wang id_ext = x->edev; 3977d21114dSBaolin Wang 3987d21114dSBaolin Wang ret = devm_extcon_register_notifier(x->dev, id_ext, 3997d21114dSBaolin Wang EXTCON_USB_HOST, 4007d21114dSBaolin Wang &x->id_nb); 4017d21114dSBaolin Wang if (ret < 0) { 4027d21114dSBaolin Wang dev_err(x->dev, 4037d21114dSBaolin Wang "register ID notifier failed\n"); 4047d21114dSBaolin Wang return ret; 4057d21114dSBaolin Wang } 4067d21114dSBaolin Wang } 4077d21114dSBaolin Wang } 4087d21114dSBaolin Wang 409a9081a00SBaolin Wang if (x->type_nb.notifier_call) 410a9081a00SBaolin Wang __usb_phy_get_charger_type(x); 411a9081a00SBaolin Wang 4127d21114dSBaolin Wang return 0; 4137d21114dSBaolin Wang } 4147d21114dSBaolin Wang 415cedf8602SSascha Hauer /** 416cedf8602SSascha Hauer * devm_usb_get_phy - find the USB PHY 417cedf8602SSascha Hauer * @dev - device that requests this phy 418cedf8602SSascha Hauer * @type - the type of the phy the controller requires 419cedf8602SSascha Hauer * 420cedf8602SSascha Hauer * Gets the phy using usb_get_phy(), and associates a device with it using 421cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 422cedf8602SSascha Hauer * then, devres data is freed. 423cedf8602SSascha Hauer * 424cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 425cedf8602SSascha Hauer */ 426cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type) 427cedf8602SSascha Hauer { 428cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 429cedf8602SSascha Hauer 430cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 431cedf8602SSascha Hauer if (!ptr) 4327f4d1e7bSGabor Juhos return ERR_PTR(-ENOMEM); 433cedf8602SSascha Hauer 434cedf8602SSascha Hauer phy = usb_get_phy(type); 435cedf8602SSascha Hauer if (!IS_ERR(phy)) { 436cedf8602SSascha Hauer *ptr = phy; 437cedf8602SSascha Hauer devres_add(dev, ptr); 438cedf8602SSascha Hauer } else 439cedf8602SSascha Hauer devres_free(ptr); 440cedf8602SSascha Hauer 441cedf8602SSascha Hauer return phy; 442cedf8602SSascha Hauer } 443110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy); 444cedf8602SSascha Hauer 445cedf8602SSascha Hauer /** 446cedf8602SSascha Hauer * usb_get_phy - find the USB PHY 447cedf8602SSascha Hauer * @type - the type of the phy the controller requires 448cedf8602SSascha Hauer * 449cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 450cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 451cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 452cedf8602SSascha Hauer * 453cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 454cedf8602SSascha Hauer */ 455cedf8602SSascha Hauer struct usb_phy *usb_get_phy(enum usb_phy_type type) 456cedf8602SSascha Hauer { 457cedf8602SSascha Hauer struct usb_phy *phy = NULL; 458cedf8602SSascha Hauer unsigned long flags; 459cedf8602SSascha Hauer 460cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 461cedf8602SSascha Hauer 462cedf8602SSascha Hauer phy = __usb_find_phy(&phy_list, type); 463cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 464e9d123a5SJosh Boyer pr_debug("PHY: unable to find transceiver of type %s\n", 465cedf8602SSascha Hauer usb_phy_type_string(type)); 4669dc9cb0cSMathias Krause if (!IS_ERR(phy)) 4679dc9cb0cSMathias Krause phy = ERR_PTR(-ENODEV); 4689dc9cb0cSMathias Krause 469cedf8602SSascha Hauer goto err0; 470cedf8602SSascha Hauer } 471cedf8602SSascha Hauer 472cedf8602SSascha Hauer get_device(phy->dev); 473cedf8602SSascha Hauer 474cedf8602SSascha Hauer err0: 475cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 476cedf8602SSascha Hauer 477cedf8602SSascha Hauer return phy; 478cedf8602SSascha Hauer } 479110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy); 480cedf8602SSascha Hauer 481cedf8602SSascha Hauer /** 482e842b84cSNeilBrown * devm_usb_get_phy_by_node - find the USB PHY by device_node 483cedf8602SSascha Hauer * @dev - device that requests this phy 484e842b84cSNeilBrown * @node - the device_node for the phy device. 485e842b84cSNeilBrown * @nb - a notifier_block to register with the phy. 486cedf8602SSascha Hauer * 487e842b84cSNeilBrown * Returns the phy driver associated with the given device_node, 488cedf8602SSascha Hauer * after getting a refcount to it, -ENODEV if there is no such phy or 489e842b84cSNeilBrown * -EPROBE_DEFER if the device is not yet loaded. While at that, it 490e842b84cSNeilBrown * also associates the device with 491cedf8602SSascha Hauer * the phy using devres. On driver detach, release function is invoked 492cedf8602SSascha Hauer * on the devres data, then, devres data is freed. 493cedf8602SSascha Hauer * 494e842b84cSNeilBrown * For use by peripheral drivers for devices related to a phy, 495e842b84cSNeilBrown * such as a charger. 496cedf8602SSascha Hauer */ 497e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, 498e842b84cSNeilBrown struct device_node *node, 499e842b84cSNeilBrown struct notifier_block *nb) 500cedf8602SSascha Hauer { 501e842b84cSNeilBrown struct usb_phy *phy = ERR_PTR(-ENOMEM); 502e842b84cSNeilBrown struct phy_devm *ptr; 503cedf8602SSascha Hauer unsigned long flags; 504cedf8602SSascha Hauer 505e842b84cSNeilBrown ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL); 506cedf8602SSascha Hauer if (!ptr) { 507cedf8602SSascha Hauer dev_dbg(dev, "failed to allocate memory for devres\n"); 508cedf8602SSascha Hauer goto err0; 509cedf8602SSascha Hauer } 510cedf8602SSascha Hauer 511cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 512cedf8602SSascha Hauer 513cedf8602SSascha Hauer phy = __of_usb_find_phy(node); 514c818a94cSThierry Reding if (IS_ERR(phy)) { 515c818a94cSThierry Reding devres_free(ptr); 516c818a94cSThierry Reding goto err1; 517c818a94cSThierry Reding } 5181290a958SArjun Sreedharan 519c818a94cSThierry Reding if (!try_module_get(phy->dev->driver->owner)) { 520c818a94cSThierry Reding phy = ERR_PTR(-ENODEV); 521cedf8602SSascha Hauer devres_free(ptr); 522cedf8602SSascha Hauer goto err1; 523cedf8602SSascha Hauer } 524e842b84cSNeilBrown if (nb) 525e842b84cSNeilBrown usb_register_notifier(phy, nb); 526e842b84cSNeilBrown ptr->phy = phy; 527e842b84cSNeilBrown ptr->nb = nb; 528cedf8602SSascha Hauer devres_add(dev, ptr); 529cedf8602SSascha Hauer 530cedf8602SSascha Hauer get_device(phy->dev); 531cedf8602SSascha Hauer 532cedf8602SSascha Hauer err1: 533cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 534cedf8602SSascha Hauer 535cedf8602SSascha Hauer err0: 536cedf8602SSascha Hauer 537cedf8602SSascha Hauer return phy; 538cedf8602SSascha Hauer } 539e842b84cSNeilBrown EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node); 540e842b84cSNeilBrown 541e842b84cSNeilBrown /** 542e842b84cSNeilBrown * devm_usb_get_phy_by_phandle - find the USB PHY by phandle 543e842b84cSNeilBrown * @dev - device that requests this phy 544e842b84cSNeilBrown * @phandle - name of the property holding the phy phandle value 545e842b84cSNeilBrown * @index - the index of the phy 546e842b84cSNeilBrown * 547e842b84cSNeilBrown * Returns the phy driver associated with the given phandle value, 548e842b84cSNeilBrown * after getting a refcount to it, -ENODEV if there is no such phy or 549e842b84cSNeilBrown * -EPROBE_DEFER if there is a phandle to the phy, but the device is 550e842b84cSNeilBrown * not yet loaded. While at that, it also associates the device with 551e842b84cSNeilBrown * the phy using devres. On driver detach, release function is invoked 552e842b84cSNeilBrown * on the devres data, then, devres data is freed. 553e842b84cSNeilBrown * 554e842b84cSNeilBrown * For use by USB host and peripheral drivers. 555e842b84cSNeilBrown */ 556e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, 557e842b84cSNeilBrown const char *phandle, u8 index) 558e842b84cSNeilBrown { 559e842b84cSNeilBrown struct device_node *node; 560e842b84cSNeilBrown struct usb_phy *phy; 561e842b84cSNeilBrown 562e842b84cSNeilBrown if (!dev->of_node) { 563e842b84cSNeilBrown dev_dbg(dev, "device does not have a device node entry\n"); 564e842b84cSNeilBrown return ERR_PTR(-EINVAL); 565e842b84cSNeilBrown } 566e842b84cSNeilBrown 567e842b84cSNeilBrown node = of_parse_phandle(dev->of_node, phandle, index); 568e842b84cSNeilBrown if (!node) { 569d9241ff2SRob Herring dev_dbg(dev, "failed to get %s phandle in %pOF node\n", phandle, 570d9241ff2SRob Herring dev->of_node); 571e842b84cSNeilBrown return ERR_PTR(-ENODEV); 572e842b84cSNeilBrown } 573e842b84cSNeilBrown phy = devm_usb_get_phy_by_node(dev, node, NULL); 574e842b84cSNeilBrown of_node_put(node); 575e842b84cSNeilBrown return phy; 576e842b84cSNeilBrown } 577110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); 578cedf8602SSascha Hauer 579cedf8602SSascha Hauer /** 580cedf8602SSascha Hauer * devm_usb_put_phy - release the USB PHY 581cedf8602SSascha Hauer * @dev - device that wants to release this phy 582cedf8602SSascha Hauer * @phy - the phy returned by devm_usb_get_phy() 583cedf8602SSascha Hauer * 584cedf8602SSascha Hauer * destroys the devres associated with this phy and invokes usb_put_phy 585cedf8602SSascha Hauer * to release the phy. 586cedf8602SSascha Hauer * 587cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 588cedf8602SSascha Hauer */ 589cedf8602SSascha Hauer void devm_usb_put_phy(struct device *dev, struct usb_phy *phy) 590cedf8602SSascha Hauer { 591cedf8602SSascha Hauer int r; 592cedf8602SSascha Hauer 593cedf8602SSascha Hauer r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy); 594cedf8602SSascha Hauer dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); 595cedf8602SSascha Hauer } 596110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_put_phy); 597cedf8602SSascha Hauer 598cedf8602SSascha Hauer /** 599cedf8602SSascha Hauer * usb_put_phy - release the USB PHY 600cedf8602SSascha Hauer * @x: the phy returned by usb_get_phy() 601cedf8602SSascha Hauer * 602cedf8602SSascha Hauer * Releases a refcount the caller received from usb_get_phy(). 603cedf8602SSascha Hauer * 604cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 605cedf8602SSascha Hauer */ 606cedf8602SSascha Hauer void usb_put_phy(struct usb_phy *x) 607cedf8602SSascha Hauer { 608cedf8602SSascha Hauer if (x) { 609cedf8602SSascha Hauer struct module *owner = x->dev->driver->owner; 610cedf8602SSascha Hauer 611cedf8602SSascha Hauer put_device(x->dev); 612cedf8602SSascha Hauer module_put(owner); 613cedf8602SSascha Hauer } 614cedf8602SSascha Hauer } 615110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_put_phy); 616cedf8602SSascha Hauer 617cedf8602SSascha Hauer /** 618cedf8602SSascha Hauer * usb_add_phy - declare the USB PHY 619cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 620cedf8602SSascha Hauer * @type - the type of this PHY 621cedf8602SSascha Hauer * 622cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 623cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 624cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 625cedf8602SSascha Hauer */ 626cedf8602SSascha Hauer int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) 627cedf8602SSascha Hauer { 628cedf8602SSascha Hauer int ret = 0; 629cedf8602SSascha Hauer unsigned long flags; 630cedf8602SSascha Hauer struct usb_phy *phy; 631cedf8602SSascha Hauer 632cedf8602SSascha Hauer if (x->type != USB_PHY_TYPE_UNDEFINED) { 633cedf8602SSascha Hauer dev_err(x->dev, "not accepting initialized PHY %s\n", x->label); 634cedf8602SSascha Hauer return -EINVAL; 635cedf8602SSascha Hauer } 636cedf8602SSascha Hauer 637655283a7SBaolin Wang usb_charger_init(x); 6387d21114dSBaolin Wang ret = usb_add_extcon(x); 6397d21114dSBaolin Wang if (ret) 6407d21114dSBaolin Wang return ret; 6417d21114dSBaolin Wang 64231e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 64331e32227SNeil Zhang 644cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 645cedf8602SSascha Hauer 646cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 647cedf8602SSascha Hauer if (phy->type == type) { 648cedf8602SSascha Hauer ret = -EBUSY; 649cedf8602SSascha Hauer dev_err(x->dev, "transceiver type %s already exists\n", 650cedf8602SSascha Hauer usb_phy_type_string(type)); 651cedf8602SSascha Hauer goto out; 652cedf8602SSascha Hauer } 653cedf8602SSascha Hauer } 654cedf8602SSascha Hauer 655cedf8602SSascha Hauer x->type = type; 656cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 657cedf8602SSascha Hauer 658cedf8602SSascha Hauer out: 659cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 660cedf8602SSascha Hauer return ret; 661cedf8602SSascha Hauer } 662110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy); 663cedf8602SSascha Hauer 664cedf8602SSascha Hauer /** 665cedf8602SSascha Hauer * usb_add_phy_dev - declare the USB PHY 666cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 667cedf8602SSascha Hauer * 668cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 669cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 670cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 671cedf8602SSascha Hauer */ 672cedf8602SSascha Hauer int usb_add_phy_dev(struct usb_phy *x) 673cedf8602SSascha Hauer { 674cedf8602SSascha Hauer unsigned long flags; 6757d21114dSBaolin Wang int ret; 676cedf8602SSascha Hauer 677cedf8602SSascha Hauer if (!x->dev) { 678cedf8602SSascha Hauer dev_err(x->dev, "no device provided for PHY\n"); 679cedf8602SSascha Hauer return -EINVAL; 680cedf8602SSascha Hauer } 681cedf8602SSascha Hauer 682655283a7SBaolin Wang usb_charger_init(x); 6837d21114dSBaolin Wang ret = usb_add_extcon(x); 6847d21114dSBaolin Wang if (ret) 6857d21114dSBaolin Wang return ret; 6867d21114dSBaolin Wang 68731e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 68831e32227SNeil Zhang 689cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 690cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 691cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 692c3c0ac70SJohan Hovold 693cedf8602SSascha Hauer return 0; 694cedf8602SSascha Hauer } 695110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy_dev); 696cedf8602SSascha Hauer 697cedf8602SSascha Hauer /** 698cedf8602SSascha Hauer * usb_remove_phy - remove the OTG PHY 699cedf8602SSascha Hauer * @x: the USB OTG PHY to be removed; 700cedf8602SSascha Hauer * 701cedf8602SSascha Hauer * This reverts the effects of usb_add_phy 702cedf8602SSascha Hauer */ 703cedf8602SSascha Hauer void usb_remove_phy(struct usb_phy *x) 704cedf8602SSascha Hauer { 705cedf8602SSascha Hauer unsigned long flags; 706cedf8602SSascha Hauer 707cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 708c3c0ac70SJohan Hovold if (x) 709cedf8602SSascha Hauer list_del(&x->head); 710cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 711cedf8602SSascha Hauer } 712110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_remove_phy); 713cedf8602SSascha Hauer 714cedf8602SSascha Hauer /** 715df9f7b31SKiran Raparthy * usb_phy_set_event - set event to phy event 716df9f7b31SKiran Raparthy * @x: the phy returned by usb_get_phy(); 717df9f7b31SKiran Raparthy * 718df9f7b31SKiran Raparthy * This sets event to phy event 719df9f7b31SKiran Raparthy */ 720df9f7b31SKiran Raparthy void usb_phy_set_event(struct usb_phy *x, unsigned long event) 721df9f7b31SKiran Raparthy { 722df9f7b31SKiran Raparthy x->last_event = event; 723df9f7b31SKiran Raparthy } 724df9f7b31SKiran Raparthy EXPORT_SYMBOL_GPL(usb_phy_set_event); 725