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 25cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy(struct list_head *list, 26cedf8602SSascha Hauer enum usb_phy_type type) 27cedf8602SSascha Hauer { 28cedf8602SSascha Hauer struct usb_phy *phy = NULL; 29cedf8602SSascha Hauer 30cedf8602SSascha Hauer list_for_each_entry(phy, list, head) { 31cedf8602SSascha Hauer if (phy->type != type) 32cedf8602SSascha Hauer continue; 33cedf8602SSascha Hauer 34cedf8602SSascha Hauer return phy; 35cedf8602SSascha Hauer } 36cedf8602SSascha Hauer 37cedf8602SSascha Hauer return ERR_PTR(-ENODEV); 38cedf8602SSascha Hauer } 39cedf8602SSascha Hauer 40cedf8602SSascha Hauer static struct usb_phy *__usb_find_phy_dev(struct device *dev, 41cedf8602SSascha Hauer struct list_head *list, u8 index) 42cedf8602SSascha Hauer { 43cedf8602SSascha Hauer struct usb_phy_bind *phy_bind = NULL; 44cedf8602SSascha Hauer 45cedf8602SSascha Hauer list_for_each_entry(phy_bind, list, list) { 46cedf8602SSascha Hauer if (!(strcmp(phy_bind->dev_name, dev_name(dev))) && 47cedf8602SSascha Hauer phy_bind->index == index) { 48cedf8602SSascha Hauer if (phy_bind->phy) 49cedf8602SSascha Hauer return phy_bind->phy; 50cedf8602SSascha Hauer else 51cedf8602SSascha Hauer return ERR_PTR(-EPROBE_DEFER); 52cedf8602SSascha Hauer } 53cedf8602SSascha Hauer } 54cedf8602SSascha Hauer 55cedf8602SSascha Hauer return ERR_PTR(-ENODEV); 56cedf8602SSascha Hauer } 57cedf8602SSascha Hauer 58cedf8602SSascha Hauer static struct usb_phy *__of_usb_find_phy(struct device_node *node) 59cedf8602SSascha Hauer { 60cedf8602SSascha Hauer struct usb_phy *phy; 61cedf8602SSascha Hauer 62cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 63cedf8602SSascha Hauer if (node != phy->dev->of_node) 64cedf8602SSascha Hauer continue; 65cedf8602SSascha Hauer 66cedf8602SSascha Hauer return phy; 67cedf8602SSascha Hauer } 68cedf8602SSascha Hauer 69cedf8602SSascha Hauer return ERR_PTR(-ENODEV); 70cedf8602SSascha Hauer } 71cedf8602SSascha Hauer 72cedf8602SSascha Hauer static void devm_usb_phy_release(struct device *dev, void *res) 73cedf8602SSascha Hauer { 74cedf8602SSascha Hauer struct usb_phy *phy = *(struct usb_phy **)res; 75cedf8602SSascha Hauer 76cedf8602SSascha Hauer usb_put_phy(phy); 77cedf8602SSascha Hauer } 78cedf8602SSascha Hauer 79cedf8602SSascha Hauer static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) 80cedf8602SSascha Hauer { 81cedf8602SSascha Hauer return res == match_data; 82cedf8602SSascha Hauer } 83cedf8602SSascha Hauer 84cedf8602SSascha Hauer /** 85cedf8602SSascha Hauer * devm_usb_get_phy - find the USB PHY 86cedf8602SSascha Hauer * @dev - device that requests this phy 87cedf8602SSascha Hauer * @type - the type of the phy the controller requires 88cedf8602SSascha Hauer * 89cedf8602SSascha Hauer * Gets the phy using usb_get_phy(), and associates a device with it using 90cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 91cedf8602SSascha Hauer * then, devres data is freed. 92cedf8602SSascha Hauer * 93cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 94cedf8602SSascha Hauer */ 95cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type) 96cedf8602SSascha Hauer { 97cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 98cedf8602SSascha Hauer 99cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 100cedf8602SSascha Hauer if (!ptr) 1017f4d1e7bSGabor Juhos return ERR_PTR(-ENOMEM); 102cedf8602SSascha Hauer 103cedf8602SSascha Hauer phy = usb_get_phy(type); 104cedf8602SSascha Hauer if (!IS_ERR(phy)) { 105cedf8602SSascha Hauer *ptr = phy; 106cedf8602SSascha Hauer devres_add(dev, ptr); 107cedf8602SSascha Hauer } else 108cedf8602SSascha Hauer devres_free(ptr); 109cedf8602SSascha Hauer 110cedf8602SSascha Hauer return phy; 111cedf8602SSascha Hauer } 112110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy); 113cedf8602SSascha Hauer 114cedf8602SSascha Hauer /** 115cedf8602SSascha Hauer * usb_get_phy - find the USB PHY 116cedf8602SSascha Hauer * @type - the type of the phy the controller requires 117cedf8602SSascha Hauer * 118cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 119cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 120cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 121cedf8602SSascha Hauer * 122cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 123cedf8602SSascha Hauer */ 124cedf8602SSascha Hauer struct usb_phy *usb_get_phy(enum usb_phy_type type) 125cedf8602SSascha Hauer { 126cedf8602SSascha Hauer struct usb_phy *phy = NULL; 127cedf8602SSascha Hauer unsigned long flags; 128cedf8602SSascha Hauer 129cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 130cedf8602SSascha Hauer 131cedf8602SSascha Hauer phy = __usb_find_phy(&phy_list, type); 132cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 133e9d123a5SJosh Boyer pr_debug("PHY: unable to find transceiver of type %s\n", 134cedf8602SSascha Hauer usb_phy_type_string(type)); 1359dc9cb0cSMathias Krause if (!IS_ERR(phy)) 1369dc9cb0cSMathias Krause phy = ERR_PTR(-ENODEV); 1379dc9cb0cSMathias Krause 138cedf8602SSascha Hauer goto err0; 139cedf8602SSascha Hauer } 140cedf8602SSascha Hauer 141cedf8602SSascha Hauer get_device(phy->dev); 142cedf8602SSascha Hauer 143cedf8602SSascha Hauer err0: 144cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 145cedf8602SSascha Hauer 146cedf8602SSascha Hauer return phy; 147cedf8602SSascha Hauer } 148110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy); 149cedf8602SSascha Hauer 150cedf8602SSascha Hauer /** 151cedf8602SSascha Hauer * devm_usb_get_phy_by_phandle - find the USB PHY by phandle 152cedf8602SSascha Hauer * @dev - device that requests this phy 153cedf8602SSascha Hauer * @phandle - name of the property holding the phy phandle value 154cedf8602SSascha Hauer * @index - the index of the phy 155cedf8602SSascha Hauer * 156cedf8602SSascha Hauer * Returns the phy driver associated with the given phandle value, 157cedf8602SSascha Hauer * after getting a refcount to it, -ENODEV if there is no such phy or 158cedf8602SSascha Hauer * -EPROBE_DEFER if there is a phandle to the phy, but the device is 159cedf8602SSascha Hauer * not yet loaded. While at that, it also associates the device with 160cedf8602SSascha Hauer * the phy using devres. On driver detach, release function is invoked 161cedf8602SSascha Hauer * on the devres data, then, devres data is freed. 162cedf8602SSascha Hauer * 163cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 164cedf8602SSascha Hauer */ 165cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, 166cedf8602SSascha Hauer const char *phandle, u8 index) 167cedf8602SSascha Hauer { 168cedf8602SSascha Hauer struct usb_phy *phy = ERR_PTR(-ENOMEM), **ptr; 169cedf8602SSascha Hauer unsigned long flags; 170cedf8602SSascha Hauer struct device_node *node; 171cedf8602SSascha Hauer 172cedf8602SSascha Hauer if (!dev->of_node) { 173cedf8602SSascha Hauer dev_dbg(dev, "device does not have a device node entry\n"); 174cedf8602SSascha Hauer return ERR_PTR(-EINVAL); 175cedf8602SSascha Hauer } 176cedf8602SSascha Hauer 177cedf8602SSascha Hauer node = of_parse_phandle(dev->of_node, phandle, index); 178cedf8602SSascha Hauer if (!node) { 179cedf8602SSascha Hauer dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle, 180cedf8602SSascha Hauer dev->of_node->full_name); 181cedf8602SSascha Hauer return ERR_PTR(-ENODEV); 182cedf8602SSascha Hauer } 183cedf8602SSascha Hauer 184cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 185cedf8602SSascha Hauer if (!ptr) { 186cedf8602SSascha Hauer dev_dbg(dev, "failed to allocate memory for devres\n"); 187cedf8602SSascha Hauer goto err0; 188cedf8602SSascha Hauer } 189cedf8602SSascha Hauer 190cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 191cedf8602SSascha Hauer 192cedf8602SSascha Hauer phy = __of_usb_find_phy(node); 193cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 194cedf8602SSascha Hauer phy = ERR_PTR(-EPROBE_DEFER); 195cedf8602SSascha Hauer devres_free(ptr); 196cedf8602SSascha Hauer goto err1; 197cedf8602SSascha Hauer } 198cedf8602SSascha Hauer 199cedf8602SSascha Hauer *ptr = phy; 200cedf8602SSascha Hauer devres_add(dev, ptr); 201cedf8602SSascha Hauer 202cedf8602SSascha Hauer get_device(phy->dev); 203cedf8602SSascha Hauer 204cedf8602SSascha Hauer err1: 205cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 206cedf8602SSascha Hauer 207cedf8602SSascha Hauer err0: 208cedf8602SSascha Hauer of_node_put(node); 209cedf8602SSascha Hauer 210cedf8602SSascha Hauer return phy; 211cedf8602SSascha Hauer } 212110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); 213cedf8602SSascha Hauer 214cedf8602SSascha Hauer /** 215cedf8602SSascha Hauer * usb_get_phy_dev - find the USB PHY 216cedf8602SSascha Hauer * @dev - device that requests this phy 217cedf8602SSascha Hauer * @index - the index of the phy 218cedf8602SSascha Hauer * 219cedf8602SSascha Hauer * Returns the phy driver, after getting a refcount to it; or 220cedf8602SSascha Hauer * -ENODEV if there is no such phy. The caller is responsible for 221cedf8602SSascha Hauer * calling usb_put_phy() to release that count. 222cedf8602SSascha Hauer * 223cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 224cedf8602SSascha Hauer */ 225cedf8602SSascha Hauer struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index) 226cedf8602SSascha Hauer { 227cedf8602SSascha Hauer struct usb_phy *phy = NULL; 228cedf8602SSascha Hauer unsigned long flags; 229cedf8602SSascha Hauer 230cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 231cedf8602SSascha Hauer 232cedf8602SSascha Hauer phy = __usb_find_phy_dev(dev, &phy_bind_list, index); 233cedf8602SSascha Hauer if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { 234e9d123a5SJosh Boyer dev_dbg(dev, "unable to find transceiver\n"); 235cedf8602SSascha Hauer goto err0; 236cedf8602SSascha Hauer } 237cedf8602SSascha Hauer 238cedf8602SSascha Hauer get_device(phy->dev); 239cedf8602SSascha Hauer 240cedf8602SSascha Hauer err0: 241cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 242cedf8602SSascha Hauer 243cedf8602SSascha Hauer return phy; 244cedf8602SSascha Hauer } 245110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_get_phy_dev); 246cedf8602SSascha Hauer 247cedf8602SSascha Hauer /** 248cedf8602SSascha Hauer * devm_usb_get_phy_dev - find the USB PHY using device ptr and index 249cedf8602SSascha Hauer * @dev - device that requests this phy 250cedf8602SSascha Hauer * @index - the index of the phy 251cedf8602SSascha Hauer * 252cedf8602SSascha Hauer * Gets the phy using usb_get_phy_dev(), and associates a device with it using 253cedf8602SSascha Hauer * devres. On driver detach, release function is invoked on the devres data, 254cedf8602SSascha Hauer * then, devres data is freed. 255cedf8602SSascha Hauer * 256cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 257cedf8602SSascha Hauer */ 258cedf8602SSascha Hauer struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index) 259cedf8602SSascha Hauer { 260cedf8602SSascha Hauer struct usb_phy **ptr, *phy; 261cedf8602SSascha Hauer 262cedf8602SSascha Hauer ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); 263cedf8602SSascha Hauer if (!ptr) 264cedf8602SSascha Hauer return NULL; 265cedf8602SSascha Hauer 266cedf8602SSascha Hauer phy = usb_get_phy_dev(dev, index); 267cedf8602SSascha Hauer if (!IS_ERR(phy)) { 268cedf8602SSascha Hauer *ptr = phy; 269cedf8602SSascha Hauer devres_add(dev, ptr); 270cedf8602SSascha Hauer } else 271cedf8602SSascha Hauer devres_free(ptr); 272cedf8602SSascha Hauer 273cedf8602SSascha Hauer return phy; 274cedf8602SSascha Hauer } 275110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_get_phy_dev); 276cedf8602SSascha Hauer 277cedf8602SSascha Hauer /** 278cedf8602SSascha Hauer * devm_usb_put_phy - release the USB PHY 279cedf8602SSascha Hauer * @dev - device that wants to release this phy 280cedf8602SSascha Hauer * @phy - the phy returned by devm_usb_get_phy() 281cedf8602SSascha Hauer * 282cedf8602SSascha Hauer * destroys the devres associated with this phy and invokes usb_put_phy 283cedf8602SSascha Hauer * to release the phy. 284cedf8602SSascha Hauer * 285cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 286cedf8602SSascha Hauer */ 287cedf8602SSascha Hauer void devm_usb_put_phy(struct device *dev, struct usb_phy *phy) 288cedf8602SSascha Hauer { 289cedf8602SSascha Hauer int r; 290cedf8602SSascha Hauer 291cedf8602SSascha Hauer r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy); 292cedf8602SSascha Hauer dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); 293cedf8602SSascha Hauer } 294110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(devm_usb_put_phy); 295cedf8602SSascha Hauer 296cedf8602SSascha Hauer /** 297cedf8602SSascha Hauer * usb_put_phy - release the USB PHY 298cedf8602SSascha Hauer * @x: the phy returned by usb_get_phy() 299cedf8602SSascha Hauer * 300cedf8602SSascha Hauer * Releases a refcount the caller received from usb_get_phy(). 301cedf8602SSascha Hauer * 302cedf8602SSascha Hauer * For use by USB host and peripheral drivers. 303cedf8602SSascha Hauer */ 304cedf8602SSascha Hauer void usb_put_phy(struct usb_phy *x) 305cedf8602SSascha Hauer { 306cedf8602SSascha Hauer if (x) { 307cedf8602SSascha Hauer struct module *owner = x->dev->driver->owner; 308cedf8602SSascha Hauer 309cedf8602SSascha Hauer put_device(x->dev); 310cedf8602SSascha Hauer module_put(owner); 311cedf8602SSascha Hauer } 312cedf8602SSascha Hauer } 313110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_put_phy); 314cedf8602SSascha Hauer 315cedf8602SSascha Hauer /** 316cedf8602SSascha Hauer * usb_add_phy - declare the USB PHY 317cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 318cedf8602SSascha Hauer * @type - the type of this PHY 319cedf8602SSascha Hauer * 320cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 321cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 322cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 323cedf8602SSascha Hauer */ 324cedf8602SSascha Hauer int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) 325cedf8602SSascha Hauer { 326cedf8602SSascha Hauer int ret = 0; 327cedf8602SSascha Hauer unsigned long flags; 328cedf8602SSascha Hauer struct usb_phy *phy; 329cedf8602SSascha Hauer 330cedf8602SSascha Hauer if (x->type != USB_PHY_TYPE_UNDEFINED) { 331cedf8602SSascha Hauer dev_err(x->dev, "not accepting initialized PHY %s\n", x->label); 332cedf8602SSascha Hauer return -EINVAL; 333cedf8602SSascha Hauer } 334cedf8602SSascha Hauer 33531e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 33631e32227SNeil Zhang 337cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 338cedf8602SSascha Hauer 339cedf8602SSascha Hauer list_for_each_entry(phy, &phy_list, head) { 340cedf8602SSascha Hauer if (phy->type == type) { 341cedf8602SSascha Hauer ret = -EBUSY; 342cedf8602SSascha Hauer dev_err(x->dev, "transceiver type %s already exists\n", 343cedf8602SSascha Hauer usb_phy_type_string(type)); 344cedf8602SSascha Hauer goto out; 345cedf8602SSascha Hauer } 346cedf8602SSascha Hauer } 347cedf8602SSascha Hauer 348cedf8602SSascha Hauer x->type = type; 349cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 350cedf8602SSascha Hauer 351cedf8602SSascha Hauer out: 352cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 353cedf8602SSascha Hauer return ret; 354cedf8602SSascha Hauer } 355110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy); 356cedf8602SSascha Hauer 357cedf8602SSascha Hauer /** 358cedf8602SSascha Hauer * usb_add_phy_dev - declare the USB PHY 359cedf8602SSascha Hauer * @x: the USB phy to be used; or NULL 360cedf8602SSascha Hauer * 361cedf8602SSascha Hauer * This call is exclusively for use by phy drivers, which 362cedf8602SSascha Hauer * coordinate the activities of drivers for host and peripheral 363cedf8602SSascha Hauer * controllers, and in some cases for VBUS current regulation. 364cedf8602SSascha Hauer */ 365cedf8602SSascha Hauer int usb_add_phy_dev(struct usb_phy *x) 366cedf8602SSascha Hauer { 367cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 368cedf8602SSascha Hauer unsigned long flags; 369cedf8602SSascha Hauer 370cedf8602SSascha Hauer if (!x->dev) { 371cedf8602SSascha Hauer dev_err(x->dev, "no device provided for PHY\n"); 372cedf8602SSascha Hauer return -EINVAL; 373cedf8602SSascha Hauer } 374cedf8602SSascha Hauer 37531e32227SNeil Zhang ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); 37631e32227SNeil Zhang 377cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 378cedf8602SSascha Hauer list_for_each_entry(phy_bind, &phy_bind_list, list) 379cedf8602SSascha Hauer if (!(strcmp(phy_bind->phy_dev_name, dev_name(x->dev)))) 380cedf8602SSascha Hauer phy_bind->phy = x; 381cedf8602SSascha Hauer 382cedf8602SSascha Hauer list_add_tail(&x->head, &phy_list); 383cedf8602SSascha Hauer 384cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 385cedf8602SSascha Hauer return 0; 386cedf8602SSascha Hauer } 387110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_add_phy_dev); 388cedf8602SSascha Hauer 389cedf8602SSascha Hauer /** 390cedf8602SSascha Hauer * usb_remove_phy - remove the OTG PHY 391cedf8602SSascha Hauer * @x: the USB OTG PHY to be removed; 392cedf8602SSascha Hauer * 393cedf8602SSascha Hauer * This reverts the effects of usb_add_phy 394cedf8602SSascha Hauer */ 395cedf8602SSascha Hauer void usb_remove_phy(struct usb_phy *x) 396cedf8602SSascha Hauer { 397cedf8602SSascha Hauer unsigned long flags; 398cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 399cedf8602SSascha Hauer 400cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 401cedf8602SSascha Hauer if (x) { 402cedf8602SSascha Hauer list_for_each_entry(phy_bind, &phy_bind_list, list) 403cedf8602SSascha Hauer if (phy_bind->phy == x) 404cedf8602SSascha Hauer phy_bind->phy = NULL; 405cedf8602SSascha Hauer list_del(&x->head); 406cedf8602SSascha Hauer } 407cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 408cedf8602SSascha Hauer } 409110ff6d0SFelipe Balbi EXPORT_SYMBOL_GPL(usb_remove_phy); 410cedf8602SSascha Hauer 411cedf8602SSascha Hauer /** 412cedf8602SSascha Hauer * usb_bind_phy - bind the phy and the controller that uses the phy 413cedf8602SSascha Hauer * @dev_name: the device name of the device that will bind to the phy 414cedf8602SSascha Hauer * @index: index to specify the port number 415cedf8602SSascha Hauer * @phy_dev_name: the device name of the phy 416cedf8602SSascha Hauer * 417cedf8602SSascha Hauer * Fills the phy_bind structure with the dev_name and phy_dev_name. This will 418cedf8602SSascha Hauer * be used when the phy driver registers the phy and when the controller 419cedf8602SSascha Hauer * requests this phy. 420cedf8602SSascha Hauer * 421cedf8602SSascha Hauer * To be used by platform specific initialization code. 422cedf8602SSascha Hauer */ 42319d8ceddSDenis Efremov int usb_bind_phy(const char *dev_name, u8 index, 424cedf8602SSascha Hauer const char *phy_dev_name) 425cedf8602SSascha Hauer { 426cedf8602SSascha Hauer struct usb_phy_bind *phy_bind; 427cedf8602SSascha Hauer unsigned long flags; 428cedf8602SSascha Hauer 429cedf8602SSascha Hauer phy_bind = kzalloc(sizeof(*phy_bind), GFP_KERNEL); 430e9d123a5SJosh Boyer if (!phy_bind) 431cedf8602SSascha Hauer return -ENOMEM; 432cedf8602SSascha Hauer 433cedf8602SSascha Hauer phy_bind->dev_name = dev_name; 434cedf8602SSascha Hauer phy_bind->phy_dev_name = phy_dev_name; 435cedf8602SSascha Hauer phy_bind->index = index; 436cedf8602SSascha Hauer 437cedf8602SSascha Hauer spin_lock_irqsave(&phy_lock, flags); 438cedf8602SSascha Hauer list_add_tail(&phy_bind->list, &phy_bind_list); 439cedf8602SSascha Hauer spin_unlock_irqrestore(&phy_lock, flags); 440cedf8602SSascha Hauer 441cedf8602SSascha Hauer return 0; 442cedf8602SSascha Hauer } 443cedf8602SSascha Hauer EXPORT_SYMBOL_GPL(usb_bind_phy); 444