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 21cedf8602SSascha Hauer static LIST_HEAD(phy_list); 22cedf8602SSascha Hauer static LIST_HEAD(phy_bind_list); 23cedf8602SSascha Hauer static DEFINE_SPINLOCK(phy_lock); 24cedf8602SSascha Hauer 25e842b84cSNeilBrown struct phy_devm { 26e842b84cSNeilBrown struct usb_phy *phy; 27e842b84cSNeilBrown struct notifier_block *nb; 28e842b84cSNeilBrown }; 29e842b84cSNeilBrown 30cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy(struct list_head *list, 31cedf8602SSascha Hauer enum usb_phy_type type) 32cedf8602SSascha Hauer { 33cedf8602SSascha Hauer struct usb_phy *phy = NULL; 34cedf8602SSascha Hauer 35cedf8602SSascha Hauer list_for_each_entry(phy, list, head) { 36cedf8602SSascha Hauer if (phy->type != type) 37cedf8602SSascha Hauer continue; 38cedf8602SSascha Hauer 39cedf8602SSascha Hauer return phy; 40cedf8602SSascha Hauer } 41cedf8602SSascha Hauer 420df8fc37SHeikki Krogerus return ERR_PTR(-ENODEV); 43cedf8602SSascha Hauer } 44cedf8602SSascha Hauer 45cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy_dev(struct device *dev, 46cedf8602SSascha Hauer struct list_head *list, u8 index) 47cedf8602SSascha Hauer { 48cedf8602SSascha Hauer struct usb_phy_bind *phy_bind = NULL; 49cedf8602SSascha Hauer 50cedf8602SSascha Hauer list_for_each_entry(phy_bind, list, list) { 51cedf8602SSascha Hauer if (!(strcmp(phy_bind->dev_name, dev_name(dev))) && 52cedf8602SSascha Hauer phy_bind->index == index) { 53cedf8602SSascha Hauer if (phy_bind->phy) 54cedf8602SSascha Hauer return phy_bind->phy; 55cedf8602SSascha Hauer else 56cedf8602SSascha Hauer return ERR_PTR(-EPROBE_DEFER); 57cedf8602SSascha Hauer } 58cedf8602SSascha Hauer } 59cedf8602SSascha Hauer 60cedf8602SSascha Hauer return ERR_PTR(-ENODEV); 61cedf8602SSascha Hauer } 62cedf8602SSascha Hauer 63cedf8602SSascha Hauer static struct usb_phy *__of_usb_find_phy(struct device_node *node) 64cedf8602SSascha Hauer { 65cedf8602SSascha Hauer struct usb_phy *phy; 66cedf8602SSascha Hauer 67c818a94cSThierry Reding if (!of_device_is_available(node)) 68c818a94cSThierry Reding return ERR_PTR(-ENODEV); 69c818a94cSThierry Reding 70cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 71cedf8602SSascha Hauer if (node != phy->dev->of_node) 72cedf8602SSascha Hauer continue; 73cedf8602SSascha Hauer 74cedf8602SSascha Hauer return phy; 75cedf8602SSascha Hauer } 76cedf8602SSascha Hauer 779c9d8249SMaxime Ripard return ERR_PTR(-EPROBE_DEFER); 78cedf8602SSascha Hauer } 79cedf8602SSascha Hauer 80cedf8602SSascha Hauer static void devm_usb_phy_release(struct device *dev, void *res) 81cedf8602SSascha Hauer { 82cedf8602SSascha Hauer struct usb_phy *phy = *(struct usb_phy **)res; 83cedf8602SSascha Hauer 84cedf8602SSascha Hauer usb_put_phy(phy); 85cedf8602SSascha Hauer } 86cedf8602SSascha Hauer 87e842b84cSNeilBrown static void devm_usb_phy_release2(struct device *dev, void *_res) 88e842b84cSNeilBrown { 89e842b84cSNeilBrown struct phy_devm *res = _res; 90e842b84cSNeilBrown 91e842b84cSNeilBrown if (res->nb) 92e842b84cSNeilBrown usb_unregister_notifier(res->phy, res->nb); 93e842b84cSNeilBrown usb_put_phy(res->phy); 94e842b84cSNeilBrown } 95e842b84cSNeilBrown 96cedf8602SSascha Hauer static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) 97cedf8602SSascha Hauer { 98869aee0fSAxel Lin struct usb_phy **phy = res; 99869aee0fSAxel Lin 100869aee0fSAxel Lin return *phy == match_data; 101cedf8602SSascha Hauer } 102cedf8602SSascha Hauer 103cedf8602SSascha Hauer /** 104cedf8602SSascha Hauer * devm_usb_get_phy - find the USB PHY 105cedf8602SSascha Hauer * @dev - device that requests this phy 106cedf8602SSascha Hauer * @type - the type of the phy the controller requires 107cedf8602SSascha Hauer * 108cedf8602SSascha Hauer * Gets the phy using usb_get_phy(), and associates a device with it using 109cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 110cedf8602SSascha Hauer * then, devres data is freed. 111cedf8602SSascha Hauer * 112cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 113cedf8602SSascha Hauer */ 114cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type) 115cedf8602SSascha Hauer { 116cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 117cedf8602SSascha Hauer 118cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 119cedf8602SSascha Hauer if (!ptr) 1207f4d1e7bSGabor Juhos return ERR_PTR(-ENOMEM); 121cedf8602SSascha Hauer 122cedf8602SSascha Hauer phy = usb_get_phy(type); 123cedf8602SSascha Hauer if (!IS_ERR(phy)) { 124cedf8602SSascha Hauer *ptr = phy; 125cedf8602SSascha Hauer devres_add(dev, ptr); 126cedf8602SSascha Hauer } else 127cedf8602SSascha Hauer devres_free(ptr); 128cedf8602SSascha Hauer 129cedf8602SSascha Hauer return phy; 130cedf8602SSascha Hauer } 131110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy); 132cedf8602SSascha Hauer 133cedf8602SSascha Hauer /** 134cedf8602SSascha Hauer * usb_get_phy - find the USB PHY 135cedf8602SSascha Hauer * @type - the type of the phy the controller requires 136cedf8602SSascha Hauer * 137cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 138cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 139cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 140cedf8602SSascha Hauer * 141cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 142cedf8602SSascha Hauer */ 143cedf8602SSascha Hauer struct usb_phy *usb_get_phy(enum usb_phy_type type) 144cedf8602SSascha Hauer { 145cedf8602SSascha Hauer struct usb_phy *phy = NULL; 146cedf8602SSascha Hauer unsigned long flags; 147cedf8602SSascha Hauer 148cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 149cedf8602SSascha Hauer 150cedf8602SSascha Hauer phy = __usb_find_phy(&phy_list, type); 151cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 152e9d123a5SJosh Boyer pr_debug("PHY: unable to find transceiver of type %s\n", 153cedf8602SSascha Hauer usb_phy_type_string(type)); 1549dc9cb0cSMathias Krause if (!IS_ERR(phy)) 1559dc9cb0cSMathias Krause phy = ERR_PTR(-ENODEV); 1569dc9cb0cSMathias Krause 157cedf8602SSascha Hauer goto err0; 158cedf8602SSascha Hauer } 159cedf8602SSascha Hauer 160cedf8602SSascha Hauer get_device(phy->dev); 161cedf8602SSascha Hauer 162cedf8602SSascha Hauer err0: 163cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 164cedf8602SSascha Hauer 165cedf8602SSascha Hauer return phy; 166cedf8602SSascha Hauer } 167110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy); 168cedf8602SSascha Hauer 169cedf8602SSascha Hauer /** 170e842b84cSNeilBrown * devm_usb_get_phy_by_node - find the USB PHY by device_node 171cedf8602SSascha Hauer * @dev - device that requests this phy 172e842b84cSNeilBrown * @node - the device_node for the phy device. 173e842b84cSNeilBrown * @nb - a notifier_block to register with the phy. 174cedf8602SSascha Hauer * 175e842b84cSNeilBrown * Returns the phy driver associated with the given device_node, 176cedf8602SSascha Hauer * after getting a refcount to it, -ENODEV if there is no such phy or 177e842b84cSNeilBrown * -EPROBE_DEFER if the device is not yet loaded. While at that, it 178e842b84cSNeilBrown * also associates the device with 179cedf8602SSascha Hauer * the phy using devres. On driver detach, release function is invoked 180cedf8602SSascha Hauer * on the devres data, then, devres data is freed. 181cedf8602SSascha Hauer * 182e842b84cSNeilBrown * For use by peripheral drivers for devices related to a phy, 183e842b84cSNeilBrown * such as a charger. 184cedf8602SSascha Hauer */ 185e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, 186e842b84cSNeilBrown struct device_node *node, 187e842b84cSNeilBrown struct notifier_block *nb) 188cedf8602SSascha Hauer { 189e842b84cSNeilBrown struct usb_phy *phy = ERR_PTR(-ENOMEM); 190e842b84cSNeilBrown struct phy_devm *ptr; 191cedf8602SSascha Hauer unsigned long flags; 192cedf8602SSascha Hauer 193e842b84cSNeilBrown ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL); 194cedf8602SSascha Hauer if (!ptr) { 195cedf8602SSascha Hauer dev_dbg(dev, "failed to allocate memory for devres\n"); 196cedf8602SSascha Hauer goto err0; 197cedf8602SSascha Hauer } 198cedf8602SSascha Hauer 199cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 200cedf8602SSascha Hauer 201cedf8602SSascha Hauer phy = __of_usb_find_phy(node); 202c818a94cSThierry Reding if (IS_ERR(phy)) { 203c818a94cSThierry Reding devres_free(ptr); 204c818a94cSThierry Reding goto err1; 205c818a94cSThierry Reding } 2061290a958SArjun Sreedharan 207c818a94cSThierry Reding if (!try_module_get(phy->dev->driver->owner)) { 208c818a94cSThierry Reding phy = ERR_PTR(-ENODEV); 209cedf8602SSascha Hauer devres_free(ptr); 210cedf8602SSascha Hauer goto err1; 211cedf8602SSascha Hauer } 212e842b84cSNeilBrown if (nb) 213e842b84cSNeilBrown usb_register_notifier(phy, nb); 214e842b84cSNeilBrown ptr->phy = phy; 215e842b84cSNeilBrown ptr->nb = nb; 216cedf8602SSascha Hauer devres_add(dev, ptr); 217cedf8602SSascha Hauer 218cedf8602SSascha Hauer get_device(phy->dev); 219cedf8602SSascha Hauer 220cedf8602SSascha Hauer err1: 221cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 222cedf8602SSascha Hauer 223cedf8602SSascha Hauer err0: 224cedf8602SSascha Hauer 225cedf8602SSascha Hauer return phy; 226cedf8602SSascha Hauer } 227e842b84cSNeilBrown EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node); 228e842b84cSNeilBrown 229e842b84cSNeilBrown /** 230e842b84cSNeilBrown * devm_usb_get_phy_by_phandle - find the USB PHY by phandle 231e842b84cSNeilBrown * @dev - device that requests this phy 232e842b84cSNeilBrown * @phandle - name of the property holding the phy phandle value 233e842b84cSNeilBrown * @index - the index of the phy 234e842b84cSNeilBrown * 235e842b84cSNeilBrown * Returns the phy driver associated with the given phandle value, 236e842b84cSNeilBrown * after getting a refcount to it, -ENODEV if there is no such phy or 237e842b84cSNeilBrown * -EPROBE_DEFER if there is a phandle to the phy, but the device is 238e842b84cSNeilBrown * not yet loaded. While at that, it also associates the device with 239e842b84cSNeilBrown * the phy using devres. On driver detach, release function is invoked 240e842b84cSNeilBrown * on the devres data, then, devres data is freed. 241e842b84cSNeilBrown * 242e842b84cSNeilBrown * For use by USB host and peripheral drivers. 243e842b84cSNeilBrown */ 244e842b84cSNeilBrown struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, 245e842b84cSNeilBrown const char *phandle, u8 index) 246e842b84cSNeilBrown { 247e842b84cSNeilBrown struct device_node *node; 248e842b84cSNeilBrown struct usb_phy *phy; 249e842b84cSNeilBrown 250e842b84cSNeilBrown if (!dev->of_node) { 251e842b84cSNeilBrown dev_dbg(dev, "device does not have a device node entry\n"); 252e842b84cSNeilBrown return ERR_PTR(-EINVAL); 253e842b84cSNeilBrown } 254e842b84cSNeilBrown 255e842b84cSNeilBrown node = of_parse_phandle(dev->of_node, phandle, index); 256e842b84cSNeilBrown if (!node) { 257e842b84cSNeilBrown dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle, 258e842b84cSNeilBrown dev->of_node->full_name); 259e842b84cSNeilBrown return ERR_PTR(-ENODEV); 260e842b84cSNeilBrown } 261e842b84cSNeilBrown phy = devm_usb_get_phy_by_node(dev, node, NULL); 262e842b84cSNeilBrown of_node_put(node); 263e842b84cSNeilBrown return phy; 264e842b84cSNeilBrown } 265110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); 266cedf8602SSascha Hauer 267cedf8602SSascha Hauer /** 268cedf8602SSascha Hauer * usb_get_phy_dev - find the USB PHY 269cedf8602SSascha Hauer * @dev - device that requests this phy 270cedf8602SSascha Hauer * @index - the index of the phy 271cedf8602SSascha Hauer * 272cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 273cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 274cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 275cedf8602SSascha Hauer * 276cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 277cedf8602SSascha Hauer */ 278cedf8602SSascha Hauer struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index) 279cedf8602SSascha Hauer { 280cedf8602SSascha Hauer struct usb_phy *phy = NULL; 281cedf8602SSascha Hauer unsigned long flags; 282cedf8602SSascha Hauer 283cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 284cedf8602SSascha Hauer 285cedf8602SSascha Hauer phy = __usb_find_phy_dev(dev, &phy_bind_list, index); 286cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 287e9d123a5SJosh Boyer dev_dbg(dev, "unable to find transceiver\n"); 2882c4e3dbfSArjun Sreedharan if (!IS_ERR(phy)) 2892c4e3dbfSArjun Sreedharan phy = ERR_PTR(-ENODEV); 2902c4e3dbfSArjun Sreedharan 291cedf8602SSascha Hauer goto err0; 292cedf8602SSascha Hauer } 293cedf8602SSascha Hauer 294cedf8602SSascha Hauer get_device(phy->dev); 295cedf8602SSascha Hauer 296cedf8602SSascha Hauer err0: 297cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 298cedf8602SSascha Hauer 299cedf8602SSascha Hauer return phy; 300cedf8602SSascha Hauer } 301110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy_dev); 302cedf8602SSascha Hauer 303cedf8602SSascha Hauer /** 304cedf8602SSascha Hauer * devm_usb_get_phy_dev - find the USB PHY using device ptr and index 305cedf8602SSascha Hauer * @dev - device that requests this phy 306cedf8602SSascha Hauer * @index - the index of the phy 307cedf8602SSascha Hauer * 308cedf8602SSascha Hauer * Gets the phy using usb_get_phy_dev(), and associates a device with it using 309cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 310cedf8602SSascha Hauer * then, devres data is freed. 311cedf8602SSascha Hauer * 312cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 313cedf8602SSascha Hauer */ 314cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index) 315cedf8602SSascha Hauer { 316cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 317cedf8602SSascha Hauer 318cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 319cedf8602SSascha Hauer if (!ptr) 320cedf8602SSascha Hauer return NULL; 321cedf8602SSascha Hauer 322cedf8602SSascha Hauer phy = usb_get_phy_dev(dev, index); 323cedf8602SSascha Hauer if (!IS_ERR(phy)) { 324cedf8602SSascha Hauer *ptr = phy; 325cedf8602SSascha Hauer devres_add(dev, ptr); 326cedf8602SSascha Hauer } else 327cedf8602SSascha Hauer devres_free(ptr); 328cedf8602SSascha Hauer 329cedf8602SSascha Hauer return phy; 330cedf8602SSascha Hauer } 331110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_dev); 332cedf8602SSascha Hauer 333cedf8602SSascha Hauer /** 334cedf8602SSascha Hauer * devm_usb_put_phy - release the USB PHY 335cedf8602SSascha Hauer * @dev - device that wants to release this phy 336cedf8602SSascha Hauer * @phy - the phy returned by devm_usb_get_phy() 337cedf8602SSascha Hauer * 338cedf8602SSascha Hauer * destroys the devres associated with this phy and invokes usb_put_phy 339cedf8602SSascha Hauer * to release the phy. 340cedf8602SSascha Hauer * 341cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 342cedf8602SSascha Hauer */ 343cedf8602SSascha Hauer void devm_usb_put_phy(struct device *dev, struct usb_phy *phy) 344cedf8602SSascha Hauer { 345cedf8602SSascha Hauer int r; 346cedf8602SSascha Hauer 347cedf8602SSascha Hauer r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy); 348cedf8602SSascha Hauer dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); 349cedf8602SSascha Hauer } 350110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_put_phy); 351cedf8602SSascha Hauer 352cedf8602SSascha Hauer /** 353cedf8602SSascha Hauer * usb_put_phy - release the USB PHY 354cedf8602SSascha Hauer * @x: the phy returned by usb_get_phy() 355cedf8602SSascha Hauer * 356cedf8602SSascha Hauer * Releases a refcount the caller received from usb_get_phy(). 357cedf8602SSascha Hauer * 358cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 359cedf8602SSascha Hauer */ 360cedf8602SSascha Hauer void usb_put_phy(struct usb_phy *x) 361cedf8602SSascha Hauer { 362cedf8602SSascha Hauer if (x) { 363cedf8602SSascha Hauer struct module *owner = x->dev->driver->owner; 364cedf8602SSascha Hauer 365cedf8602SSascha Hauer put_device(x->dev); 366cedf8602SSascha Hauer module_put(owner); 367cedf8602SSascha Hauer } 368cedf8602SSascha Hauer } 369110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_put_phy); 370cedf8602SSascha Hauer 371cedf8602SSascha Hauer /** 372cedf8602SSascha Hauer * usb_add_phy - declare the USB PHY 373cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 374cedf8602SSascha Hauer * @type - the type of this PHY 375cedf8602SSascha Hauer * 376cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 377cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 378cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 379cedf8602SSascha Hauer */ 380cedf8602SSascha Hauer int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) 381cedf8602SSascha Hauer { 382cedf8602SSascha Hauer int ret = 0; 383cedf8602SSascha Hauer unsigned long flags; 384cedf8602SSascha Hauer struct usb_phy *phy; 385cedf8602SSascha Hauer 386cedf8602SSascha Hauer if (x->type != USB_PHY_TYPE_UNDEFINED) { 387cedf8602SSascha Hauer dev_err(x->dev, "not accepting initialized PHY %s\n", x->label); 388cedf8602SSascha Hauer return -EINVAL; 389cedf8602SSascha Hauer } 390cedf8602SSascha Hauer 39131e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 39231e32227SNeil Zhang 393cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 394cedf8602SSascha Hauer 395cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 396cedf8602SSascha Hauer if (phy->type == type) { 397cedf8602SSascha Hauer ret = -EBUSY; 398cedf8602SSascha Hauer dev_err(x->dev, "transceiver type %s already exists\n", 399cedf8602SSascha Hauer usb_phy_type_string(type)); 400cedf8602SSascha Hauer goto out; 401cedf8602SSascha Hauer } 402cedf8602SSascha Hauer } 403cedf8602SSascha Hauer 404cedf8602SSascha Hauer x->type = type; 405cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 406cedf8602SSascha Hauer 407cedf8602SSascha Hauer out: 408cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 409cedf8602SSascha Hauer return ret; 410cedf8602SSascha Hauer } 411110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy); 412cedf8602SSascha Hauer 413cedf8602SSascha Hauer /** 414cedf8602SSascha Hauer * usb_add_phy_dev - declare the USB PHY 415cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 416cedf8602SSascha Hauer * 417cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 418cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 419cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 420cedf8602SSascha Hauer */ 421cedf8602SSascha Hauer int usb_add_phy_dev(struct usb_phy *x) 422cedf8602SSascha Hauer { 423cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 424cedf8602SSascha Hauer unsigned long flags; 425cedf8602SSascha Hauer 426cedf8602SSascha Hauer if (!x->dev) { 427cedf8602SSascha Hauer dev_err(x->dev, "no device provided for PHY\n"); 428cedf8602SSascha Hauer return -EINVAL; 429cedf8602SSascha Hauer } 430cedf8602SSascha Hauer 43131e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 43231e32227SNeil Zhang 433cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 434cedf8602SSascha Hauer list_for_each_entry(phy_bind, &phy_bind_list, list) 435cedf8602SSascha Hauer if (!(strcmp(phy_bind->phy_dev_name, dev_name(x->dev)))) 436cedf8602SSascha Hauer phy_bind->phy = x; 437cedf8602SSascha Hauer 438cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 439cedf8602SSascha Hauer 440cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 441cedf8602SSascha Hauer return 0; 442cedf8602SSascha Hauer } 443110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy_dev); 444cedf8602SSascha Hauer 445cedf8602SSascha Hauer /** 446cedf8602SSascha Hauer * usb_remove_phy - remove the OTG PHY 447cedf8602SSascha Hauer * @x: the USB OTG PHY to be removed; 448cedf8602SSascha Hauer * 449cedf8602SSascha Hauer * This reverts the effects of usb_add_phy 450cedf8602SSascha Hauer */ 451cedf8602SSascha Hauer void usb_remove_phy(struct usb_phy *x) 452cedf8602SSascha Hauer { 453cedf8602SSascha Hauer unsigned long flags; 454cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 455cedf8602SSascha Hauer 456cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 457cedf8602SSascha Hauer if (x) { 458cedf8602SSascha Hauer list_for_each_entry(phy_bind, &phy_bind_list, list) 459cedf8602SSascha Hauer if (phy_bind->phy == x) 460cedf8602SSascha Hauer phy_bind->phy = NULL; 461cedf8602SSascha Hauer list_del(&x->head); 462cedf8602SSascha Hauer } 463cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 464cedf8602SSascha Hauer } 465110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_remove_phy); 466cedf8602SSascha Hauer 467cedf8602SSascha Hauer /** 468cedf8602SSascha Hauer * usb_bind_phy - bind the phy and the controller that uses the phy 469cedf8602SSascha Hauer * @dev_name: the device name of the device that will bind to the phy 470cedf8602SSascha Hauer * @index: index to specify the port number 471cedf8602SSascha Hauer * @phy_dev_name: the device name of the phy 472cedf8602SSascha Hauer * 473cedf8602SSascha Hauer * Fills the phy_bind structure with the dev_name and phy_dev_name. This will 474cedf8602SSascha Hauer * be used when the phy driver registers the phy and when the controller 475cedf8602SSascha Hauer * requests this phy. 476cedf8602SSascha Hauer * 477cedf8602SSascha Hauer * To be used by platform specific initialization code. 478cedf8602SSascha Hauer */ 47919d8ceddSDenis Efremov int usb_bind_phy(const char *dev_name, u8 index, 480cedf8602SSascha Hauer const char *phy_dev_name) 481cedf8602SSascha Hauer { 482cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 483cedf8602SSascha Hauer unsigned long flags; 484cedf8602SSascha Hauer 485cedf8602SSascha Hauer phy_bind = kzalloc(sizeof(*phy_bind), GFP_KERNEL); 486e9d123a5SJosh Boyer if (!phy_bind) 487cedf8602SSascha Hauer return -ENOMEM; 488cedf8602SSascha Hauer 489cedf8602SSascha Hauer phy_bind->dev_name = dev_name; 490cedf8602SSascha Hauer phy_bind->phy_dev_name = phy_dev_name; 491cedf8602SSascha Hauer phy_bind->index = index; 492cedf8602SSascha Hauer 493cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 494cedf8602SSascha Hauer list_add_tail(&phy_bind->list, &phy_bind_list); 495cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 496cedf8602SSascha Hauer 497cedf8602SSascha Hauer return 0; 498cedf8602SSascha Hauer } 499cedf8602SSascha Hauer EXPORT_SYMBOL_GPL(usb_bind_phy); 500df9f7b31SKiran Raparthy 501df9f7b31SKiran Raparthy /** 502df9f7b31SKiran Raparthy * usb_phy_set_event - set event to phy event 503df9f7b31SKiran Raparthy * @x: the phy returned by usb_get_phy(); 504df9f7b31SKiran Raparthy * 505df9f7b31SKiran Raparthy * This sets event to phy event 506df9f7b31SKiran Raparthy */ 507df9f7b31SKiran Raparthy void usb_phy_set_event(struct usb_phy *x, unsigned long event) 508df9f7b31SKiran Raparthy { 509df9f7b31SKiran Raparthy x->last_event = event; 510df9f7b31SKiran Raparthy } 511df9f7b31SKiran Raparthy EXPORT_SYMBOL_GPL(usb_phy_set_event); 512