1cedf8602SSascha Hauer /* 2cedf8602SSascha Hauer * phy.c -- USB phy handling 3cedf8602SSascha Hauer * 4cedf8602SSascha Hauer * Copyright (C) 2004-2013 Texas Instruments 5cedf8602SSascha Hauer * 6cedf8602SSascha Hauer * This program is free software; you can redistribute it and/or modify 7cedf8602SSascha Hauer * it under the terms of the GNU General Public License as published by 8cedf8602SSascha Hauer * the Free Software Foundation; either version 2 of the License, or 9cedf8602SSascha Hauer * (at your option) any later version. 10cedf8602SSascha Hauer */ 11cedf8602SSascha Hauer #include <linux/kernel.h> 12cedf8602SSascha Hauer #include <linux/export.h> 13cedf8602SSascha Hauer #include <linux/err.h> 14cedf8602SSascha Hauer #include <linux/device.h> 15cedf8602SSascha Hauer #include <linux/module.h> 16cedf8602SSascha Hauer #include <linux/slab.h> 17cedf8602SSascha Hauer #include <linux/of.h> 18cedf8602SSascha Hauer 19cedf8602SSascha Hauer #include <linux/usb/phy.h> 20cedf8602SSascha Hauer 21a9081a00SBaolin Wang /* Default current range by charger type. */ 22a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MIN 2 23a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MAX 500 24a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MIN_SS 150 25a9081a00SBaolin Wang #define DEFAULT_SDP_CUR_MAX_SS 900 26a9081a00SBaolin Wang #define DEFAULT_DCP_CUR_MIN 500 27a9081a00SBaolin Wang #define DEFAULT_DCP_CUR_MAX 5000 28a9081a00SBaolin Wang #define DEFAULT_CDP_CUR_MIN 1500 29a9081a00SBaolin Wang #define DEFAULT_CDP_CUR_MAX 5000 30a9081a00SBaolin Wang #define DEFAULT_ACA_CUR_MIN 1500 31a9081a00SBaolin Wang #define DEFAULT_ACA_CUR_MAX 5000 32a9081a00SBaolin Wang 33cedf8602SSascha Hauer static LIST_HEAD(phy_list); 34cedf8602SSascha Hauer static LIST_HEAD(phy_bind_list); 35cedf8602SSascha Hauer static DEFINE_SPINLOCK(phy_lock); 36cedf8602SSascha Hauer 37e842b84cSNeilBrown struct phy_devm { 38e842b84cSNeilBrown struct usb_phy *phy; 39e842b84cSNeilBrown struct notifier_block *nb; 40e842b84cSNeilBrown }; 41e842b84cSNeilBrown 42cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy(struct list_head *list, 43cedf8602SSascha Hauer enum usb_phy_type type) 44cedf8602SSascha Hauer { 45cedf8602SSascha Hauer struct usb_phy *phy = NULL; 46cedf8602SSascha Hauer 47cedf8602SSascha Hauer list_for_each_entry(phy, list, head) { 48cedf8602SSascha Hauer if (phy->type != type) 49cedf8602SSascha Hauer continue; 50cedf8602SSascha Hauer 51cedf8602SSascha Hauer return phy; 52cedf8602SSascha Hauer } 53cedf8602SSascha Hauer 540df8fc37SHeikki Krogerus return ERR_PTR(-ENODEV); 55cedf8602SSascha Hauer } 56cedf8602SSascha Hauer 57cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy_dev(struct device *dev, 58cedf8602SSascha Hauer struct list_head *list, u8 index) 59cedf8602SSascha Hauer { 60cedf8602SSascha Hauer struct usb_phy_bind *phy_bind = NULL; 61cedf8602SSascha Hauer 62cedf8602SSascha Hauer list_for_each_entry(phy_bind, list, list) { 63cedf8602SSascha Hauer if (!(strcmp(phy_bind->dev_name, dev_name(dev))) && 64cedf8602SSascha Hauer phy_bind->index == index) { 65cedf8602SSascha Hauer if (phy_bind->phy) 66cedf8602SSascha Hauer return phy_bind->phy; 67cedf8602SSascha Hauer else 68cedf8602SSascha Hauer return ERR_PTR(-EPROBE_DEFER); 69cedf8602SSascha Hauer } 70cedf8602SSascha Hauer } 71cedf8602SSascha Hauer 72cedf8602SSascha Hauer return ERR_PTR(-ENODEV); 73cedf8602SSascha Hauer } 74cedf8602SSascha Hauer 75cedf8602SSascha Hauer static struct usb_phy *__of_usb_find_phy(struct device_node *node) 76cedf8602SSascha Hauer { 77cedf8602SSascha Hauer struct usb_phy *phy; 78cedf8602SSascha Hauer 79c818a94cSThierry Reding if (!of_device_is_available(node)) 80c818a94cSThierry Reding return ERR_PTR(-ENODEV); 81c818a94cSThierry Reding 82cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 83cedf8602SSascha Hauer if (node != phy->dev->of_node) 84cedf8602SSascha Hauer continue; 85cedf8602SSascha Hauer 86cedf8602SSascha Hauer return phy; 87cedf8602SSascha Hauer } 88cedf8602SSascha Hauer 899c9d8249SMaxime Ripard return ERR_PTR(-EPROBE_DEFER); 90cedf8602SSascha Hauer } 91cedf8602SSascha Hauer 92a9081a00SBaolin Wang static void usb_phy_set_default_current(struct usb_phy *usb_phy) 93a9081a00SBaolin Wang { 94a9081a00SBaolin Wang usb_phy->chg_cur.sdp_min = DEFAULT_SDP_CUR_MIN; 95a9081a00SBaolin Wang usb_phy->chg_cur.sdp_max = DEFAULT_SDP_CUR_MAX; 96a9081a00SBaolin Wang usb_phy->chg_cur.dcp_min = DEFAULT_DCP_CUR_MIN; 97a9081a00SBaolin Wang usb_phy->chg_cur.dcp_max = DEFAULT_DCP_CUR_MAX; 98a9081a00SBaolin Wang usb_phy->chg_cur.cdp_min = DEFAULT_CDP_CUR_MIN; 99a9081a00SBaolin Wang usb_phy->chg_cur.cdp_max = DEFAULT_CDP_CUR_MAX; 100a9081a00SBaolin Wang usb_phy->chg_cur.aca_min = DEFAULT_ACA_CUR_MIN; 101a9081a00SBaolin Wang usb_phy->chg_cur.aca_max = DEFAULT_ACA_CUR_MAX; 102a9081a00SBaolin Wang } 103a9081a00SBaolin Wang 104a9081a00SBaolin Wang /** 105a9081a00SBaolin Wang * usb_phy_notify_charger_work - notify the USB charger state 106a9081a00SBaolin Wang * @work - the charger work to notify the USB charger state 107a9081a00SBaolin Wang * 108a9081a00SBaolin Wang * This work can be issued when USB charger state has been changed or 109a9081a00SBaolin Wang * USB charger current has been changed, then we can notify the current 110a9081a00SBaolin Wang * what can be drawn to power user and the charger state to userspace. 111a9081a00SBaolin Wang * 112a9081a00SBaolin Wang * If we get the charger type from extcon subsystem, we can notify the 113a9081a00SBaolin Wang * charger state to power user automatically by usb_phy_get_charger_type() 114a9081a00SBaolin Wang * issuing from extcon subsystem. 115a9081a00SBaolin Wang * 116a9081a00SBaolin Wang * If we get the charger type from ->charger_detect() instead of extcon 117a9081a00SBaolin Wang * subsystem, the usb phy driver should issue usb_phy_set_charger_state() 118a9081a00SBaolin Wang * to set charger state when the charger state has been changed. 119a9081a00SBaolin Wang */ 120a9081a00SBaolin Wang static void usb_phy_notify_charger_work(struct work_struct *work) 121a9081a00SBaolin Wang { 122a9081a00SBaolin Wang struct usb_phy *usb_phy = container_of(work, struct usb_phy, chg_work); 123a9081a00SBaolin Wang char uchger_state[50] = { 0 }; 124a9081a00SBaolin Wang char *envp[] = { uchger_state, NULL }; 125a9081a00SBaolin Wang unsigned int min, max; 126a9081a00SBaolin Wang 127a9081a00SBaolin Wang switch (usb_phy->chg_state) { 128a9081a00SBaolin Wang case USB_CHARGER_PRESENT: 129a9081a00SBaolin Wang usb_phy_get_charger_current(usb_phy, &min, &max); 130a9081a00SBaolin Wang 131a9081a00SBaolin Wang atomic_notifier_call_chain(&usb_phy->notifier, max, usb_phy); 132a9081a00SBaolin Wang snprintf(uchger_state, ARRAY_SIZE(uchger_state), 133a9081a00SBaolin Wang "USB_CHARGER_STATE=%s", "USB_CHARGER_PRESENT"); 134a9081a00SBaolin Wang break; 135a9081a00SBaolin Wang case USB_CHARGER_ABSENT: 136a9081a00SBaolin Wang usb_phy_set_default_current(usb_phy); 137a9081a00SBaolin Wang 138a9081a00SBaolin Wang atomic_notifier_call_chain(&usb_phy->notifier, 0, usb_phy); 139a9081a00SBaolin Wang snprintf(uchger_state, ARRAY_SIZE(uchger_state), 140a9081a00SBaolin Wang "USB_CHARGER_STATE=%s", "USB_CHARGER_ABSENT"); 141a9081a00SBaolin Wang break; 142a9081a00SBaolin Wang default: 143a9081a00SBaolin Wang dev_warn(usb_phy->dev, "Unknown USB charger state: %d\n", 144a9081a00SBaolin Wang usb_phy->chg_state); 145a9081a00SBaolin Wang return; 146a9081a00SBaolin Wang } 147a9081a00SBaolin Wang 148a9081a00SBaolin Wang kobject_uevent_env(&usb_phy->dev->kobj, KOBJ_CHANGE, envp); 149a9081a00SBaolin Wang } 150a9081a00SBaolin Wang 151a9081a00SBaolin Wang static void __usb_phy_get_charger_type(struct usb_phy *usb_phy) 152a9081a00SBaolin Wang { 153a9081a00SBaolin Wang if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_SDP) > 0) { 154a9081a00SBaolin Wang usb_phy->chg_type = SDP_TYPE; 155a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 156a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_CDP) > 0) { 157a9081a00SBaolin Wang usb_phy->chg_type = CDP_TYPE; 158a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 159a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_DCP) > 0) { 160a9081a00SBaolin Wang usb_phy->chg_type = DCP_TYPE; 161a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 162a9081a00SBaolin Wang } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_ACA) > 0) { 163a9081a00SBaolin Wang usb_phy->chg_type = ACA_TYPE; 164a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_PRESENT; 165a9081a00SBaolin Wang } else { 166a9081a00SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 167a9081a00SBaolin Wang usb_phy->chg_state = USB_CHARGER_ABSENT; 168a9081a00SBaolin Wang } 169a9081a00SBaolin Wang 170a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 171a9081a00SBaolin Wang } 172a9081a00SBaolin Wang 173a9081a00SBaolin Wang /** 174a9081a00SBaolin Wang * usb_phy_get_charger_type - get charger type from extcon subsystem 175a9081a00SBaolin Wang * @nb -the notifier block to determine charger type 176a9081a00SBaolin Wang * @state - the cable state 177a9081a00SBaolin Wang * @data - private data 178a9081a00SBaolin Wang * 179a9081a00SBaolin Wang * Determin the charger type from extcon subsystem which also means the 180a9081a00SBaolin Wang * charger state has been chaned, then we should notify this event. 181a9081a00SBaolin Wang */ 182a9081a00SBaolin Wang static int usb_phy_get_charger_type(struct notifier_block *nb, 183a9081a00SBaolin Wang unsigned long state, void *data) 184a9081a00SBaolin Wang { 185a9081a00SBaolin Wang struct usb_phy *usb_phy = container_of(nb, struct usb_phy, type_nb); 186a9081a00SBaolin Wang 187a9081a00SBaolin Wang __usb_phy_get_charger_type(usb_phy); 188a9081a00SBaolin Wang return NOTIFY_OK; 189a9081a00SBaolin Wang } 190a9081a00SBaolin Wang 191a9081a00SBaolin Wang /** 192a9081a00SBaolin Wang * usb_phy_set_charger_current - set the USB charger current 193a9081a00SBaolin Wang * @usb_phy - the USB phy to be used 194a9081a00SBaolin Wang * @mA - the current need to be set 195a9081a00SBaolin Wang * 196a9081a00SBaolin Wang * Usually we only change the charger default current when USB finished the 197a9081a00SBaolin Wang * enumeration as one SDP charger. As one SDP charger, usb_phy_set_power() 198a9081a00SBaolin Wang * will issue this function to change charger current when after setting USB 199a9081a00SBaolin Wang * configuration, or suspend/resume USB. For other type charger, we should 200a9081a00SBaolin Wang * use the default charger current and we do not suggest to issue this function 201a9081a00SBaolin Wang * to change the charger current. 202a9081a00SBaolin Wang * 203a9081a00SBaolin Wang * When USB charger current has been changed, we need to notify the power users. 204a9081a00SBaolin Wang */ 205a9081a00SBaolin Wang void usb_phy_set_charger_current(struct usb_phy *usb_phy, unsigned int mA) 206a9081a00SBaolin Wang { 207a9081a00SBaolin Wang switch (usb_phy->chg_type) { 208a9081a00SBaolin Wang case SDP_TYPE: 209a9081a00SBaolin Wang if (usb_phy->chg_cur.sdp_max == mA) 210a9081a00SBaolin Wang return; 211a9081a00SBaolin Wang 212a9081a00SBaolin Wang usb_phy->chg_cur.sdp_max = (mA > DEFAULT_SDP_CUR_MAX_SS) ? 213a9081a00SBaolin Wang DEFAULT_SDP_CUR_MAX_SS : mA; 214a9081a00SBaolin Wang break; 215a9081a00SBaolin Wang case DCP_TYPE: 216a9081a00SBaolin Wang if (usb_phy->chg_cur.dcp_max == mA) 217a9081a00SBaolin Wang return; 218a9081a00SBaolin Wang 219a9081a00SBaolin Wang usb_phy->chg_cur.dcp_max = (mA > DEFAULT_DCP_CUR_MAX) ? 220a9081a00SBaolin Wang DEFAULT_DCP_CUR_MAX : mA; 221a9081a00SBaolin Wang break; 222a9081a00SBaolin Wang case CDP_TYPE: 223a9081a00SBaolin Wang if (usb_phy->chg_cur.cdp_max == mA) 224a9081a00SBaolin Wang return; 225a9081a00SBaolin Wang 226a9081a00SBaolin Wang usb_phy->chg_cur.cdp_max = (mA > DEFAULT_CDP_CUR_MAX) ? 227a9081a00SBaolin Wang DEFAULT_CDP_CUR_MAX : mA; 228a9081a00SBaolin Wang break; 229a9081a00SBaolin Wang case ACA_TYPE: 230a9081a00SBaolin Wang if (usb_phy->chg_cur.aca_max == mA) 231a9081a00SBaolin Wang return; 232a9081a00SBaolin Wang 233a9081a00SBaolin Wang usb_phy->chg_cur.aca_max = (mA > DEFAULT_ACA_CUR_MAX) ? 234a9081a00SBaolin Wang DEFAULT_ACA_CUR_MAX : mA; 235a9081a00SBaolin Wang break; 236a9081a00SBaolin Wang default: 237a9081a00SBaolin Wang return; 238a9081a00SBaolin Wang } 239a9081a00SBaolin Wang 240a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 241a9081a00SBaolin Wang } 242a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_set_charger_current); 243a9081a00SBaolin Wang 244a9081a00SBaolin Wang /** 245a9081a00SBaolin Wang * usb_phy_get_charger_current - get the USB charger current 246a9081a00SBaolin Wang * @usb_phy - the USB phy to be used 247a9081a00SBaolin Wang * @min - the minimum current 248a9081a00SBaolin Wang * @max - the maximum current 249a9081a00SBaolin Wang * 250a9081a00SBaolin Wang * Usually we will notify the maximum current to power user, but for some 251a9081a00SBaolin Wang * special case, power user also need the minimum current value. Then the 252a9081a00SBaolin Wang * power user can issue this function to get the suitable current. 253a9081a00SBaolin Wang */ 254a9081a00SBaolin Wang void usb_phy_get_charger_current(struct usb_phy *usb_phy, 255a9081a00SBaolin Wang unsigned int *min, unsigned int *max) 256a9081a00SBaolin Wang { 257a9081a00SBaolin Wang switch (usb_phy->chg_type) { 258a9081a00SBaolin Wang case SDP_TYPE: 259a9081a00SBaolin Wang *min = usb_phy->chg_cur.sdp_min; 260a9081a00SBaolin Wang *max = usb_phy->chg_cur.sdp_max; 261a9081a00SBaolin Wang break; 262a9081a00SBaolin Wang case DCP_TYPE: 263a9081a00SBaolin Wang *min = usb_phy->chg_cur.dcp_min; 264a9081a00SBaolin Wang *max = usb_phy->chg_cur.dcp_max; 265a9081a00SBaolin Wang break; 266a9081a00SBaolin Wang case CDP_TYPE: 267a9081a00SBaolin Wang *min = usb_phy->chg_cur.cdp_min; 268a9081a00SBaolin Wang *max = usb_phy->chg_cur.cdp_max; 269a9081a00SBaolin Wang break; 270a9081a00SBaolin Wang case ACA_TYPE: 271a9081a00SBaolin Wang *min = usb_phy->chg_cur.aca_min; 272a9081a00SBaolin Wang *max = usb_phy->chg_cur.aca_max; 273a9081a00SBaolin Wang break; 274a9081a00SBaolin Wang default: 275a9081a00SBaolin Wang *min = 0; 276a9081a00SBaolin Wang *max = 0; 277a9081a00SBaolin Wang break; 278a9081a00SBaolin Wang } 279a9081a00SBaolin Wang } 280a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_get_charger_current); 281a9081a00SBaolin Wang 282a9081a00SBaolin Wang /** 283a9081a00SBaolin Wang * usb_phy_set_charger_state - set the USB charger state 284a9081a00SBaolin Wang * @usb_phy - the USB phy to be used 285a9081a00SBaolin Wang * @state - the new state need to be set for charger 286a9081a00SBaolin Wang * 287a9081a00SBaolin Wang * The usb phy driver can issue this function when the usb phy driver 288a9081a00SBaolin Wang * detected the charger state has been changed, in this case the charger 289a9081a00SBaolin Wang * type should be get from ->charger_detect(). 290a9081a00SBaolin Wang */ 291a9081a00SBaolin Wang void usb_phy_set_charger_state(struct usb_phy *usb_phy, 292a9081a00SBaolin Wang enum usb_charger_state state) 293a9081a00SBaolin Wang { 294a9081a00SBaolin Wang if (usb_phy->chg_state == state || !usb_phy->charger_detect) 295a9081a00SBaolin Wang return; 296a9081a00SBaolin Wang 297a9081a00SBaolin Wang usb_phy->chg_state = state; 298a9081a00SBaolin Wang if (usb_phy->chg_state == USB_CHARGER_PRESENT) 299a9081a00SBaolin Wang usb_phy->chg_type = usb_phy->charger_detect(usb_phy); 300a9081a00SBaolin Wang else 301a9081a00SBaolin Wang usb_phy->chg_type = UNKNOWN_TYPE; 302a9081a00SBaolin Wang 303a9081a00SBaolin Wang schedule_work(&usb_phy->chg_work); 304a9081a00SBaolin Wang } 305a9081a00SBaolin Wang EXPORT_SYMBOL_GPL(usb_phy_set_charger_state); 306a9081a00SBaolin Wang 307cedf8602SSascha Hauer static void devm_usb_phy_release(struct device *dev, void *res) 308cedf8602SSascha Hauer { 309cedf8602SSascha Hauer struct usb_phy *phy = *(struct usb_phy **)res; 310cedf8602SSascha Hauer 311cedf8602SSascha Hauer usb_put_phy(phy); 312cedf8602SSascha Hauer } 313cedf8602SSascha Hauer 314e842b84cSNeilBrown static void devm_usb_phy_release2(struct device *dev, void *_res) 315e842b84cSNeilBrown { 316e842b84cSNeilBrown struct phy_devm *res = _res; 317e842b84cSNeilBrown 318e842b84cSNeilBrown if (res->nb) 319e842b84cSNeilBrown usb_unregister_notifier(res->phy, res->nb); 320e842b84cSNeilBrown usb_put_phy(res->phy); 321e842b84cSNeilBrown } 322e842b84cSNeilBrown 323cedf8602SSascha Hauer static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) 324cedf8602SSascha Hauer { 325869aee0fSAxel Lin struct usb_phy **phy = res; 326869aee0fSAxel Lin 327869aee0fSAxel Lin return *phy == match_data; 328cedf8602SSascha Hauer } 329cedf8602SSascha Hauer 3307d21114dSBaolin Wang static int usb_add_extcon(struct usb_phy *x) 3317d21114dSBaolin Wang { 3327d21114dSBaolin Wang int ret; 3337d21114dSBaolin Wang 3347d21114dSBaolin Wang if (of_property_read_bool(x->dev->of_node, "extcon")) { 3357d21114dSBaolin Wang x->edev = extcon_get_edev_by_phandle(x->dev, 0); 3367d21114dSBaolin Wang if (IS_ERR(x->edev)) 3377d21114dSBaolin Wang return PTR_ERR(x->edev); 3387d21114dSBaolin Wang 3397d21114dSBaolin Wang x->id_edev = extcon_get_edev_by_phandle(x->dev, 1); 3407d21114dSBaolin Wang if (IS_ERR(x->id_edev)) { 3417d21114dSBaolin Wang x->id_edev = NULL; 3427d21114dSBaolin Wang dev_info(x->dev, "No separate ID extcon device\n"); 3437d21114dSBaolin Wang } 3447d21114dSBaolin Wang 3457d21114dSBaolin Wang if (x->vbus_nb.notifier_call) { 3467d21114dSBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 3477d21114dSBaolin Wang EXTCON_USB, 3487d21114dSBaolin Wang &x->vbus_nb); 3497d21114dSBaolin Wang if (ret < 0) { 3507d21114dSBaolin Wang dev_err(x->dev, 3517d21114dSBaolin Wang "register VBUS notifier failed\n"); 3527d21114dSBaolin Wang return ret; 3537d21114dSBaolin Wang } 354a9081a00SBaolin Wang } else { 355a9081a00SBaolin Wang x->type_nb.notifier_call = usb_phy_get_charger_type; 356a9081a00SBaolin Wang 357a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 358a9081a00SBaolin Wang EXTCON_CHG_USB_SDP, 359a9081a00SBaolin Wang &x->type_nb); 360a9081a00SBaolin Wang if (ret) { 361a9081a00SBaolin Wang dev_err(x->dev, 362a9081a00SBaolin Wang "register extcon USB SDP failed.\n"); 363a9081a00SBaolin Wang return ret; 364a9081a00SBaolin Wang } 365a9081a00SBaolin Wang 366a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 367a9081a00SBaolin Wang EXTCON_CHG_USB_CDP, 368a9081a00SBaolin Wang &x->type_nb); 369a9081a00SBaolin Wang if (ret) { 370a9081a00SBaolin Wang dev_err(x->dev, 371a9081a00SBaolin Wang "register extcon USB CDP failed.\n"); 372a9081a00SBaolin Wang return ret; 373a9081a00SBaolin Wang } 374a9081a00SBaolin Wang 375a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 376a9081a00SBaolin Wang EXTCON_CHG_USB_DCP, 377a9081a00SBaolin Wang &x->type_nb); 378a9081a00SBaolin Wang if (ret) { 379a9081a00SBaolin Wang dev_err(x->dev, 380a9081a00SBaolin Wang "register extcon USB DCP failed.\n"); 381a9081a00SBaolin Wang return ret; 382a9081a00SBaolin Wang } 383a9081a00SBaolin Wang 384a9081a00SBaolin Wang ret = devm_extcon_register_notifier(x->dev, x->edev, 385a9081a00SBaolin Wang EXTCON_CHG_USB_ACA, 386a9081a00SBaolin Wang &x->type_nb); 387a9081a00SBaolin Wang if (ret) { 388a9081a00SBaolin Wang dev_err(x->dev, 389a9081a00SBaolin Wang "register extcon USB ACA failed.\n"); 390a9081a00SBaolin Wang return ret; 391a9081a00SBaolin Wang } 3927d21114dSBaolin Wang } 3937d21114dSBaolin Wang 3947d21114dSBaolin Wang if (x->id_nb.notifier_call) { 3957d21114dSBaolin Wang struct extcon_dev *id_ext; 3967d21114dSBaolin Wang 3977d21114dSBaolin Wang if (x->id_edev) 3987d21114dSBaolin Wang id_ext = x->id_edev; 3997d21114dSBaolin Wang else 4007d21114dSBaolin Wang id_ext = x->edev; 4017d21114dSBaolin Wang 4027d21114dSBaolin Wang ret = devm_extcon_register_notifier(x->dev, id_ext, 4037d21114dSBaolin Wang EXTCON_USB_HOST, 4047d21114dSBaolin Wang &x->id_nb); 4057d21114dSBaolin Wang if (ret < 0) { 4067d21114dSBaolin Wang dev_err(x->dev, 4077d21114dSBaolin Wang "register ID notifier failed\n"); 4087d21114dSBaolin Wang return ret; 4097d21114dSBaolin Wang } 4107d21114dSBaolin Wang } 4117d21114dSBaolin Wang } 4127d21114dSBaolin Wang 413a9081a00SBaolin Wang usb_phy_set_default_current(x); 414a9081a00SBaolin Wang INIT_WORK(&x->chg_work, usb_phy_notify_charger_work); 415a9081a00SBaolin Wang x->chg_type = UNKNOWN_TYPE; 416a9081a00SBaolin Wang x->chg_state = USB_CHARGER_DEFAULT; 417a9081a00SBaolin Wang if (x->type_nb.notifier_call) 418a9081a00SBaolin Wang __usb_phy_get_charger_type(x); 419a9081a00SBaolin Wang 4207d21114dSBaolin Wang return 0; 4217d21114dSBaolin Wang } 4227d21114dSBaolin Wang 423cedf8602SSascha Hauer /** 424cedf8602SSascha Hauer * devm_usb_get_phy - find the USB PHY 425cedf8602SSascha Hauer * @dev - device that requests this phy 426cedf8602SSascha Hauer * @type - the type of the phy the controller requires 427cedf8602SSascha Hauer * 428cedf8602SSascha Hauer * Gets the phy using usb_get_phy(), and associates a device with it using 429cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 430cedf8602SSascha Hauer * then, devres data is freed. 431cedf8602SSascha Hauer * 432cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 433cedf8602SSascha Hauer */ 434cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type) 435cedf8602SSascha Hauer { 436cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 437cedf8602SSascha Hauer 438cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 439cedf8602SSascha Hauer if (!ptr) 4407f4d1e7bSGabor Juhos return ERR_PTR(-ENOMEM); 441cedf8602SSascha Hauer 442cedf8602SSascha Hauer phy = usb_get_phy(type); 443cedf8602SSascha Hauer if (!IS_ERR(phy)) { 444cedf8602SSascha Hauer *ptr = phy; 445cedf8602SSascha Hauer devres_add(dev, ptr); 446cedf8602SSascha Hauer } else 447cedf8602SSascha Hauer devres_free(ptr); 448cedf8602SSascha Hauer 449cedf8602SSascha Hauer return phy; 450cedf8602SSascha Hauer } 451110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy); 452cedf8602SSascha Hauer 453cedf8602SSascha Hauer /** 454cedf8602SSascha Hauer * usb_get_phy - find the USB PHY 455cedf8602SSascha Hauer * @type - the type of the phy the controller requires 456cedf8602SSascha Hauer * 457cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 458cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 459cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 460cedf8602SSascha Hauer * 461cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 462cedf8602SSascha Hauer */ 463cedf8602SSascha Hauer struct usb_phy *usb_get_phy(enum usb_phy_type type) 464cedf8602SSascha Hauer { 465cedf8602SSascha Hauer struct usb_phy *phy = NULL; 466cedf8602SSascha Hauer unsigned long flags; 467cedf8602SSascha Hauer 468cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 469cedf8602SSascha Hauer 470cedf8602SSascha Hauer phy = __usb_find_phy(&phy_list, type); 471cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 472e9d123a5SJosh Boyer pr_debug("PHY: unable to find transceiver of type %s\n", 473cedf8602SSascha Hauer usb_phy_type_string(type)); 4749dc9cb0cSMathias Krause if (!IS_ERR(phy)) 4759dc9cb0cSMathias Krause phy = ERR_PTR(-ENODEV); 4769dc9cb0cSMathias Krause 477cedf8602SSascha Hauer goto err0; 478cedf8602SSascha Hauer } 479cedf8602SSascha Hauer 480cedf8602SSascha Hauer get_device(phy->dev); 481cedf8602SSascha Hauer 482cedf8602SSascha Hauer err0: 483cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 484cedf8602SSascha Hauer 485cedf8602SSascha Hauer return phy; 486cedf8602SSascha Hauer } 487110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy); 488cedf8602SSascha Hauer 489cedf8602SSascha Hauer /** 490e842b84cSNeilBrown * devm_usb_get_phy_by_node - find the USB PHY by device_node 491cedf8602SSascha Hauer * @dev - device that requests this phy 492e842b84cSNeilBrown * @node - the device_node for the phy device. 493e842b84cSNeilBrown * @nb - a notifier_block to register with the phy. 494cedf8602SSascha Hauer * 495e842b84cSNeilBrown * Returns the phy driver associated with the given device_node, 496cedf8602SSascha Hauer * after getting a refcount to it, -ENODEV if there is no such phy or 497e842b84cSNeilBrown * -EPROBE_DEFER if the device is not yet loaded. While at that, it 498e842b84cSNeilBrown * also associates the device with 499cedf8602SSascha Hauer * the phy using devres. On driver detach, release function is invoked 500cedf8602SSascha Hauer * on the devres data, then, devres data is freed. 501cedf8602SSascha Hauer * 502e842b84cSNeilBrown * For use by peripheral drivers for devices related to a phy, 503e842b84cSNeilBrown * such as a charger. 504cedf8602SSascha Hauer */ 505e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, 506e842b84cSNeilBrown struct device_node *node, 507e842b84cSNeilBrown struct notifier_block *nb) 508cedf8602SSascha Hauer { 509e842b84cSNeilBrown struct usb_phy *phy = ERR_PTR(-ENOMEM); 510e842b84cSNeilBrown struct phy_devm *ptr; 511cedf8602SSascha Hauer unsigned long flags; 512cedf8602SSascha Hauer 513e842b84cSNeilBrown ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL); 514cedf8602SSascha Hauer if (!ptr) { 515cedf8602SSascha Hauer dev_dbg(dev, "failed to allocate memory for devres\n"); 516cedf8602SSascha Hauer goto err0; 517cedf8602SSascha Hauer } 518cedf8602SSascha Hauer 519cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 520cedf8602SSascha Hauer 521cedf8602SSascha Hauer phy = __of_usb_find_phy(node); 522c818a94cSThierry Reding if (IS_ERR(phy)) { 523c818a94cSThierry Reding devres_free(ptr); 524c818a94cSThierry Reding goto err1; 525c818a94cSThierry Reding } 5261290a958SArjun Sreedharan 527c818a94cSThierry Reding if (!try_module_get(phy->dev->driver->owner)) { 528c818a94cSThierry Reding phy = ERR_PTR(-ENODEV); 529cedf8602SSascha Hauer devres_free(ptr); 530cedf8602SSascha Hauer goto err1; 531cedf8602SSascha Hauer } 532e842b84cSNeilBrown if (nb) 533e842b84cSNeilBrown usb_register_notifier(phy, nb); 534e842b84cSNeilBrown ptr->phy = phy; 535e842b84cSNeilBrown ptr->nb = nb; 536cedf8602SSascha Hauer devres_add(dev, ptr); 537cedf8602SSascha Hauer 538cedf8602SSascha Hauer get_device(phy->dev); 539cedf8602SSascha Hauer 540cedf8602SSascha Hauer err1: 541cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 542cedf8602SSascha Hauer 543cedf8602SSascha Hauer err0: 544cedf8602SSascha Hauer 545cedf8602SSascha Hauer return phy; 546cedf8602SSascha Hauer } 547e842b84cSNeilBrown EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node); 548e842b84cSNeilBrown 549e842b84cSNeilBrown /** 550e842b84cSNeilBrown * devm_usb_get_phy_by_phandle - find the USB PHY by phandle 551e842b84cSNeilBrown * @dev - device that requests this phy 552e842b84cSNeilBrown * @phandle - name of the property holding the phy phandle value 553e842b84cSNeilBrown * @index - the index of the phy 554e842b84cSNeilBrown * 555e842b84cSNeilBrown * Returns the phy driver associated with the given phandle value, 556e842b84cSNeilBrown * after getting a refcount to it, -ENODEV if there is no such phy or 557e842b84cSNeilBrown * -EPROBE_DEFER if there is a phandle to the phy, but the device is 558e842b84cSNeilBrown * not yet loaded. While at that, it also associates the device with 559e842b84cSNeilBrown * the phy using devres. On driver detach, release function is invoked 560e842b84cSNeilBrown * on the devres data, then, devres data is freed. 561e842b84cSNeilBrown * 562e842b84cSNeilBrown * For use by USB host and peripheral drivers. 563e842b84cSNeilBrown */ 564e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, 565e842b84cSNeilBrown const char *phandle, u8 index) 566e842b84cSNeilBrown { 567e842b84cSNeilBrown struct device_node *node; 568e842b84cSNeilBrown struct usb_phy *phy; 569e842b84cSNeilBrown 570e842b84cSNeilBrown if (!dev->of_node) { 571e842b84cSNeilBrown dev_dbg(dev, "device does not have a device node entry\n"); 572e842b84cSNeilBrown return ERR_PTR(-EINVAL); 573e842b84cSNeilBrown } 574e842b84cSNeilBrown 575e842b84cSNeilBrown node = of_parse_phandle(dev->of_node, phandle, index); 576e842b84cSNeilBrown if (!node) { 577e842b84cSNeilBrown dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle, 578e842b84cSNeilBrown dev->of_node->full_name); 579e842b84cSNeilBrown return ERR_PTR(-ENODEV); 580e842b84cSNeilBrown } 581e842b84cSNeilBrown phy = devm_usb_get_phy_by_node(dev, node, NULL); 582e842b84cSNeilBrown of_node_put(node); 583e842b84cSNeilBrown return phy; 584e842b84cSNeilBrown } 585110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); 586cedf8602SSascha Hauer 587cedf8602SSascha Hauer /** 588cedf8602SSascha Hauer * usb_get_phy_dev - find the USB PHY 589cedf8602SSascha Hauer * @dev - device that requests this phy 590cedf8602SSascha Hauer * @index - the index of the phy 591cedf8602SSascha Hauer * 592cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 593cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 594cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 595cedf8602SSascha Hauer * 596cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 597cedf8602SSascha Hauer */ 598cedf8602SSascha Hauer struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index) 599cedf8602SSascha Hauer { 600cedf8602SSascha Hauer struct usb_phy *phy = NULL; 601cedf8602SSascha Hauer unsigned long flags; 602cedf8602SSascha Hauer 603cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 604cedf8602SSascha Hauer 605cedf8602SSascha Hauer phy = __usb_find_phy_dev(dev, &phy_bind_list, index); 606cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 607e9d123a5SJosh Boyer dev_dbg(dev, "unable to find transceiver\n"); 6082c4e3dbfSArjun Sreedharan if (!IS_ERR(phy)) 6092c4e3dbfSArjun Sreedharan phy = ERR_PTR(-ENODEV); 6102c4e3dbfSArjun Sreedharan 611cedf8602SSascha Hauer goto err0; 612cedf8602SSascha Hauer } 613cedf8602SSascha Hauer 614cedf8602SSascha Hauer get_device(phy->dev); 615cedf8602SSascha Hauer 616cedf8602SSascha Hauer err0: 617cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 618cedf8602SSascha Hauer 619cedf8602SSascha Hauer return phy; 620cedf8602SSascha Hauer } 621110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy_dev); 622cedf8602SSascha Hauer 623cedf8602SSascha Hauer /** 624cedf8602SSascha Hauer * devm_usb_get_phy_dev - find the USB PHY using device ptr and index 625cedf8602SSascha Hauer * @dev - device that requests this phy 626cedf8602SSascha Hauer * @index - the index of the phy 627cedf8602SSascha Hauer * 628cedf8602SSascha Hauer * Gets the phy using usb_get_phy_dev(), and associates a device with it using 629cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 630cedf8602SSascha Hauer * then, devres data is freed. 631cedf8602SSascha Hauer * 632cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 633cedf8602SSascha Hauer */ 634cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index) 635cedf8602SSascha Hauer { 636cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 637cedf8602SSascha Hauer 638cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 639cedf8602SSascha Hauer if (!ptr) 640cedf8602SSascha Hauer return NULL; 641cedf8602SSascha Hauer 642cedf8602SSascha Hauer phy = usb_get_phy_dev(dev, index); 643cedf8602SSascha Hauer if (!IS_ERR(phy)) { 644cedf8602SSascha Hauer *ptr = phy; 645cedf8602SSascha Hauer devres_add(dev, ptr); 646cedf8602SSascha Hauer } else 647cedf8602SSascha Hauer devres_free(ptr); 648cedf8602SSascha Hauer 649cedf8602SSascha Hauer return phy; 650cedf8602SSascha Hauer } 651110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_dev); 652cedf8602SSascha Hauer 653cedf8602SSascha Hauer /** 654cedf8602SSascha Hauer * devm_usb_put_phy - release the USB PHY 655cedf8602SSascha Hauer * @dev - device that wants to release this phy 656cedf8602SSascha Hauer * @phy - the phy returned by devm_usb_get_phy() 657cedf8602SSascha Hauer * 658cedf8602SSascha Hauer * destroys the devres associated with this phy and invokes usb_put_phy 659cedf8602SSascha Hauer * to release the phy. 660cedf8602SSascha Hauer * 661cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 662cedf8602SSascha Hauer */ 663cedf8602SSascha Hauer void devm_usb_put_phy(struct device *dev, struct usb_phy *phy) 664cedf8602SSascha Hauer { 665cedf8602SSascha Hauer int r; 666cedf8602SSascha Hauer 667cedf8602SSascha Hauer r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy); 668cedf8602SSascha Hauer dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); 669cedf8602SSascha Hauer } 670110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_put_phy); 671cedf8602SSascha Hauer 672cedf8602SSascha Hauer /** 673cedf8602SSascha Hauer * usb_put_phy - release the USB PHY 674cedf8602SSascha Hauer * @x: the phy returned by usb_get_phy() 675cedf8602SSascha Hauer * 676cedf8602SSascha Hauer * Releases a refcount the caller received from usb_get_phy(). 677cedf8602SSascha Hauer * 678cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 679cedf8602SSascha Hauer */ 680cedf8602SSascha Hauer void usb_put_phy(struct usb_phy *x) 681cedf8602SSascha Hauer { 682cedf8602SSascha Hauer if (x) { 683cedf8602SSascha Hauer struct module *owner = x->dev->driver->owner; 684cedf8602SSascha Hauer 685cedf8602SSascha Hauer put_device(x->dev); 686cedf8602SSascha Hauer module_put(owner); 687cedf8602SSascha Hauer } 688cedf8602SSascha Hauer } 689110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_put_phy); 690cedf8602SSascha Hauer 691cedf8602SSascha Hauer /** 692cedf8602SSascha Hauer * usb_add_phy - declare the USB PHY 693cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 694cedf8602SSascha Hauer * @type - the type of this PHY 695cedf8602SSascha Hauer * 696cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 697cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 698cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 699cedf8602SSascha Hauer */ 700cedf8602SSascha Hauer int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) 701cedf8602SSascha Hauer { 702cedf8602SSascha Hauer int ret = 0; 703cedf8602SSascha Hauer unsigned long flags; 704cedf8602SSascha Hauer struct usb_phy *phy; 705cedf8602SSascha Hauer 706cedf8602SSascha Hauer if (x->type != USB_PHY_TYPE_UNDEFINED) { 707cedf8602SSascha Hauer dev_err(x->dev, "not accepting initialized PHY %s\n", x->label); 708cedf8602SSascha Hauer return -EINVAL; 709cedf8602SSascha Hauer } 710cedf8602SSascha Hauer 7117d21114dSBaolin Wang ret = usb_add_extcon(x); 7127d21114dSBaolin Wang if (ret) 7137d21114dSBaolin Wang return ret; 7147d21114dSBaolin Wang 71531e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 71631e32227SNeil Zhang 717cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 718cedf8602SSascha Hauer 719cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 720cedf8602SSascha Hauer if (phy->type == type) { 721cedf8602SSascha Hauer ret = -EBUSY; 722cedf8602SSascha Hauer dev_err(x->dev, "transceiver type %s already exists\n", 723cedf8602SSascha Hauer usb_phy_type_string(type)); 724cedf8602SSascha Hauer goto out; 725cedf8602SSascha Hauer } 726cedf8602SSascha Hauer } 727cedf8602SSascha Hauer 728cedf8602SSascha Hauer x->type = type; 729cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 730cedf8602SSascha Hauer 731cedf8602SSascha Hauer out: 732cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 733cedf8602SSascha Hauer return ret; 734cedf8602SSascha Hauer } 735110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy); 736cedf8602SSascha Hauer 737cedf8602SSascha Hauer /** 738cedf8602SSascha Hauer * usb_add_phy_dev - declare the USB PHY 739cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 740cedf8602SSascha Hauer * 741cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 742cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 743cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 744cedf8602SSascha Hauer */ 745cedf8602SSascha Hauer int usb_add_phy_dev(struct usb_phy *x) 746cedf8602SSascha Hauer { 747cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 748cedf8602SSascha Hauer unsigned long flags; 7497d21114dSBaolin Wang int ret; 750cedf8602SSascha Hauer 751cedf8602SSascha Hauer if (!x->dev) { 752cedf8602SSascha Hauer dev_err(x->dev, "no device provided for PHY\n"); 753cedf8602SSascha Hauer return -EINVAL; 754cedf8602SSascha Hauer } 755cedf8602SSascha Hauer 7567d21114dSBaolin Wang ret = usb_add_extcon(x); 7577d21114dSBaolin Wang if (ret) 7587d21114dSBaolin Wang return ret; 7597d21114dSBaolin Wang 76031e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 76131e32227SNeil Zhang 762cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 763cedf8602SSascha Hauer list_for_each_entry(phy_bind, &phy_bind_list, list) 764cedf8602SSascha Hauer if (!(strcmp(phy_bind->phy_dev_name, dev_name(x->dev)))) 765cedf8602SSascha Hauer phy_bind->phy = x; 766cedf8602SSascha Hauer 767cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 768cedf8602SSascha Hauer 769cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 770cedf8602SSascha Hauer return 0; 771cedf8602SSascha Hauer } 772110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy_dev); 773cedf8602SSascha Hauer 774cedf8602SSascha Hauer /** 775cedf8602SSascha Hauer * usb_remove_phy - remove the OTG PHY 776cedf8602SSascha Hauer * @x: the USB OTG PHY to be removed; 777cedf8602SSascha Hauer * 778cedf8602SSascha Hauer * This reverts the effects of usb_add_phy 779cedf8602SSascha Hauer */ 780cedf8602SSascha Hauer void usb_remove_phy(struct usb_phy *x) 781cedf8602SSascha Hauer { 782cedf8602SSascha Hauer unsigned long flags; 783cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 784cedf8602SSascha Hauer 785cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 786cedf8602SSascha Hauer if (x) { 787cedf8602SSascha Hauer list_for_each_entry(phy_bind, &phy_bind_list, list) 788cedf8602SSascha Hauer if (phy_bind->phy == x) 789cedf8602SSascha Hauer phy_bind->phy = NULL; 790cedf8602SSascha Hauer list_del(&x->head); 791cedf8602SSascha Hauer } 792cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 793cedf8602SSascha Hauer } 794110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_remove_phy); 795cedf8602SSascha Hauer 796cedf8602SSascha Hauer /** 797cedf8602SSascha Hauer * usb_bind_phy - bind the phy and the controller that uses the phy 798cedf8602SSascha Hauer * @dev_name: the device name of the device that will bind to the phy 799cedf8602SSascha Hauer * @index: index to specify the port number 800cedf8602SSascha Hauer * @phy_dev_name: the device name of the phy 801cedf8602SSascha Hauer * 802cedf8602SSascha Hauer * Fills the phy_bind structure with the dev_name and phy_dev_name. This will 803cedf8602SSascha Hauer * be used when the phy driver registers the phy and when the controller 804cedf8602SSascha Hauer * requests this phy. 805cedf8602SSascha Hauer * 806cedf8602SSascha Hauer * To be used by platform specific initialization code. 807cedf8602SSascha Hauer */ 80819d8ceddSDenis Efremov int usb_bind_phy(const char *dev_name, u8 index, 809cedf8602SSascha Hauer const char *phy_dev_name) 810cedf8602SSascha Hauer { 811cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 812cedf8602SSascha Hauer unsigned long flags; 813cedf8602SSascha Hauer 814cedf8602SSascha Hauer phy_bind = kzalloc(sizeof(*phy_bind), GFP_KERNEL); 815e9d123a5SJosh Boyer if (!phy_bind) 816cedf8602SSascha Hauer return -ENOMEM; 817cedf8602SSascha Hauer 818cedf8602SSascha Hauer phy_bind->dev_name = dev_name; 819cedf8602SSascha Hauer phy_bind->phy_dev_name = phy_dev_name; 820cedf8602SSascha Hauer phy_bind->index = index; 821cedf8602SSascha Hauer 822cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 823cedf8602SSascha Hauer list_add_tail(&phy_bind->list, &phy_bind_list); 824cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 825cedf8602SSascha Hauer 826cedf8602SSascha Hauer return 0; 827cedf8602SSascha Hauer } 828cedf8602SSascha Hauer EXPORT_SYMBOL_GPL(usb_bind_phy); 829df9f7b31SKiran Raparthy 830df9f7b31SKiran Raparthy /** 831df9f7b31SKiran Raparthy * usb_phy_set_event - set event to phy event 832df9f7b31SKiran Raparthy * @x: the phy returned by usb_get_phy(); 833df9f7b31SKiran Raparthy * 834df9f7b31SKiran Raparthy * This sets event to phy event 835df9f7b31SKiran Raparthy */ 836df9f7b31SKiran Raparthy void usb_phy_set_event(struct usb_phy *x, unsigned long event) 837df9f7b31SKiran Raparthy { 838df9f7b31SKiran Raparthy x->last_event = event; 839df9f7b31SKiran Raparthy } 840df9f7b31SKiran Raparthy EXPORT_SYMBOL_GPL(usb_phy_set_event); 841