| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Baolin Wang | 1360 | 53.88% | 3 | 16.67% |
| Sascha Hauer | 854 | 33.84% | 1 | 5.56% |
| Neil Brown | 205 | 8.12% | 1 | 5.56% |
| Kiran Raparthy | 26 | 1.03% | 1 | 5.56% |
| Thierry Reding | 17 | 0.67% | 1 | 5.56% |
| Neil Zhang | 16 | 0.63% | 1 | 5.56% |
| Mathias Krause | 16 | 0.63% | 1 | 5.56% |
| Axel Lin | 10 | 0.40% | 1 | 5.56% |
| Felipe Balbi | 8 | 0.32% | 1 | 5.56% |
| Gabor Juhos | 5 | 0.20% | 1 | 5.56% |
| Greg Kroah-Hartman | 2 | 0.08% | 2 | 11.11% |
| Josh Boyer | 2 | 0.08% | 1 | 5.56% |
| Maxime Ripard | 1 | 0.04% | 1 | 5.56% |
| Heikki Krogerus | 1 | 0.04% | 1 | 5.56% |
| Rob Herring | 1 | 0.04% | 1 | 5.56% |
| Total | 2524 | 18 |
// SPDX-License-Identifier: GPL-2.0+ /* * phy.c -- USB phy handling * * Copyright (C) 2004-2013 Texas Instruments */ #include <linux/kernel.h> #include <linux/export.h> #include <linux/err.h> #include <linux/device.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/usb/phy.h> /* Default current range by charger type. */ #define DEFAULT_SDP_CUR_MIN 2 #define DEFAULT_SDP_CUR_MAX 500 #define DEFAULT_SDP_CUR_MIN_SS 150 #define DEFAULT_SDP_CUR_MAX_SS 900 #define DEFAULT_DCP_CUR_MIN 500 #define DEFAULT_DCP_CUR_MAX 5000 #define DEFAULT_CDP_CUR_MIN 1500 #define DEFAULT_CDP_CUR_MAX 5000 #define DEFAULT_ACA_CUR_MIN 1500 #define DEFAULT_ACA_CUR_MAX 5000 static LIST_HEAD(phy_list); static DEFINE_SPINLOCK(phy_lock); struct phy_devm { struct usb_phy *phy; struct notifier_block *nb; }; static struct usb_phy *__usb_find_phy(struct list_head *list, enum usb_phy_type type) { struct usb_phy *phy = NULL; list_for_each_entry(phy, list, head) { if (phy->type != type) continue; return phy; } return ERR_PTR(-ENODEV); } static struct usb_phy *__of_usb_find_phy(struct device_node *node) { struct usb_phy *phy; if (!of_device_is_available(node)) return ERR_PTR(-ENODEV); list_for_each_entry(phy, &phy_list, head) { if (node != phy->dev->of_node) continue; return phy; } return ERR_PTR(-EPROBE_DEFER); } static void usb_phy_set_default_current(struct usb_phy *usb_phy) { usb_phy->chg_cur.sdp_min = DEFAULT_SDP_CUR_MIN; usb_phy->chg_cur.sdp_max = DEFAULT_SDP_CUR_MAX; usb_phy->chg_cur.dcp_min = DEFAULT_DCP_CUR_MIN; usb_phy->chg_cur.dcp_max = DEFAULT_DCP_CUR_MAX; usb_phy->chg_cur.cdp_min = DEFAULT_CDP_CUR_MIN; usb_phy->chg_cur.cdp_max = DEFAULT_CDP_CUR_MAX; usb_phy->chg_cur.aca_min = DEFAULT_ACA_CUR_MIN; usb_phy->chg_cur.aca_max = DEFAULT_ACA_CUR_MAX; } /** * usb_phy_notify_charger_work - notify the USB charger state * @work - the charger work to notify the USB charger state * * This work can be issued when USB charger state has been changed or * USB charger current has been changed, then we can notify the current * what can be drawn to power user and the charger state to userspace. * * If we get the charger type from extcon subsystem, we can notify the * charger state to power user automatically by usb_phy_get_charger_type() * issuing from extcon subsystem. * * If we get the charger type from ->charger_detect() instead of extcon * subsystem, the usb phy driver should issue usb_phy_set_charger_state() * to set charger state when the charger state has been changed. */ static void usb_phy_notify_charger_work(struct work_struct *work) { struct usb_phy *usb_phy = container_of(work, struct usb_phy, chg_work); char uchger_state[50] = { 0 }; char *envp[] = { uchger_state, NULL }; unsigned int min, max; switch (usb_phy->chg_state) { case USB_CHARGER_PRESENT: usb_phy_get_charger_current(usb_phy, &min, &max); atomic_notifier_call_chain(&usb_phy->notifier, max, usb_phy); snprintf(uchger_state, ARRAY_SIZE(uchger_state), "USB_CHARGER_STATE=%s", "USB_CHARGER_PRESENT"); break; case USB_CHARGER_ABSENT: usb_phy_set_default_current(usb_phy); atomic_notifier_call_chain(&usb_phy->notifier, 0, usb_phy); snprintf(uchger_state, ARRAY_SIZE(uchger_state), "USB_CHARGER_STATE=%s", "USB_CHARGER_ABSENT"); break; default: dev_warn(usb_phy->dev, "Unknown USB charger state: %d\n", usb_phy->chg_state); return; } kobject_uevent_env(&usb_phy->dev->kobj, KOBJ_CHANGE, envp); } static void __usb_phy_get_charger_type(struct usb_phy *usb_phy) { if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_SDP) > 0) { usb_phy->chg_type = SDP_TYPE; usb_phy->chg_state = USB_CHARGER_PRESENT; } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_CDP) > 0) { usb_phy->chg_type = CDP_TYPE; usb_phy->chg_state = USB_CHARGER_PRESENT; } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_DCP) > 0) { usb_phy->chg_type = DCP_TYPE; usb_phy->chg_state = USB_CHARGER_PRESENT; } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_ACA) > 0) { usb_phy->chg_type = ACA_TYPE; usb_phy->chg_state = USB_CHARGER_PRESENT; } else { usb_phy->chg_type = UNKNOWN_TYPE; usb_phy->chg_state = USB_CHARGER_ABSENT; } schedule_work(&usb_phy->chg_work); } /** * usb_phy_get_charger_type - get charger type from extcon subsystem * @nb -the notifier block to determine charger type * @state - the cable state * @data - private data * * Determin the charger type from extcon subsystem which also means the * charger state has been chaned, then we should notify this event. */ static int usb_phy_get_charger_type(struct notifier_block *nb, unsigned long state, void *data) { struct usb_phy *usb_phy = container_of(nb, struct usb_phy, type_nb); __usb_phy_get_charger_type(usb_phy); return NOTIFY_OK; } /** * usb_phy_set_charger_current - set the USB charger current * @usb_phy - the USB phy to be used * @mA - the current need to be set * * Usually we only change the charger default current when USB finished the * enumeration as one SDP charger. As one SDP charger, usb_phy_set_power() * will issue this function to change charger current when after setting USB * configuration, or suspend/resume USB. For other type charger, we should * use the default charger current and we do not suggest to issue this function * to change the charger current. * * When USB charger current has been changed, we need to notify the power users. */ void usb_phy_set_charger_current(struct usb_phy *usb_phy, unsigned int mA) { switch (usb_phy->chg_type) { case SDP_TYPE: if (usb_phy->chg_cur.sdp_max == mA) return; usb_phy->chg_cur.sdp_max = (mA > DEFAULT_SDP_CUR_MAX_SS) ? DEFAULT_SDP_CUR_MAX_SS : mA; break; case DCP_TYPE: if (usb_phy->chg_cur.dcp_max == mA) return; usb_phy->chg_cur.dcp_max = (mA > DEFAULT_DCP_CUR_MAX) ? DEFAULT_DCP_CUR_MAX : mA; break; case CDP_TYPE: if (usb_phy->chg_cur.cdp_max == mA) return; usb_phy->chg_cur.cdp_max = (mA > DEFAULT_CDP_CUR_MAX) ? DEFAULT_CDP_CUR_MAX : mA; break; case ACA_TYPE: if (usb_phy->chg_cur.aca_max == mA) return; usb_phy->chg_cur.aca_max = (mA > DEFAULT_ACA_CUR_MAX) ? DEFAULT_ACA_CUR_MAX : mA; break; default: return; } schedule_work(&usb_phy->chg_work); } EXPORT_SYMBOL_GPL(usb_phy_set_charger_current); /** * usb_phy_get_charger_current - get the USB charger current * @usb_phy - the USB phy to be used * @min - the minimum current * @max - the maximum current * * Usually we will notify the maximum current to power user, but for some * special case, power user also need the minimum current value. Then the * power user can issue this function to get the suitable current. */ void usb_phy_get_charger_current(struct usb_phy *usb_phy, unsigned int *min, unsigned int *max) { switch (usb_phy->chg_type) { case SDP_TYPE: *min = usb_phy->chg_cur.sdp_min; *max = usb_phy->chg_cur.sdp_max; break; case DCP_TYPE: *min = usb_phy->chg_cur.dcp_min; *max = usb_phy->chg_cur.dcp_max; break; case CDP_TYPE: *min = usb_phy->chg_cur.cdp_min; *max = usb_phy->chg_cur.cdp_max; break; case ACA_TYPE: *min = usb_phy->chg_cur.aca_min; *max = usb_phy->chg_cur.aca_max; break; default: *min = 0; *max = 0; break; } } EXPORT_SYMBOL_GPL(usb_phy_get_charger_current); /** * usb_phy_set_charger_state - set the USB charger state * @usb_phy - the USB phy to be used * @state - the new state need to be set for charger * * The usb phy driver can issue this function when the usb phy driver * detected the charger state has been changed, in this case the charger * type should be get from ->charger_detect(). */ void usb_phy_set_charger_state(struct usb_phy *usb_phy, enum usb_charger_state state) { if (usb_phy->chg_state == state || !usb_phy->charger_detect) return; usb_phy->chg_state = state; if (usb_phy->chg_state == USB_CHARGER_PRESENT) usb_phy->chg_type = usb_phy->charger_detect(usb_phy); else usb_phy->chg_type = UNKNOWN_TYPE; schedule_work(&usb_phy->chg_work); } EXPORT_SYMBOL_GPL(usb_phy_set_charger_state); static void devm_usb_phy_release(struct device *dev, void *res) { struct usb_phy *phy = *(struct usb_phy **)res; usb_put_phy(phy); } static void devm_usb_phy_release2(struct device *dev, void *_res) { struct phy_devm *res = _res; if (res->nb) usb_unregister_notifier(res->phy, res->nb); usb_put_phy(res->phy); } static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) { struct usb_phy **phy = res; return *phy == match_data; } static void usb_charger_init(struct usb_phy *usb_phy) { usb_phy->chg_type = UNKNOWN_TYPE; usb_phy->chg_state = USB_CHARGER_DEFAULT; usb_phy_set_default_current(usb_phy); INIT_WORK(&usb_phy->chg_work, usb_phy_notify_charger_work); } static int usb_add_extcon(struct usb_phy *x) { int ret; if (of_property_read_bool(x->dev->of_node, "extcon")) { x->edev = extcon_get_edev_by_phandle(x->dev, 0); if (IS_ERR(x->edev)) return PTR_ERR(x->edev); x->id_edev = extcon_get_edev_by_phandle(x->dev, 1); if (IS_ERR(x->id_edev)) { x->id_edev = NULL; dev_info(x->dev, "No separate ID extcon device\n"); } if (x->vbus_nb.notifier_call) { ret = devm_extcon_register_notifier(x->dev, x->edev, EXTCON_USB, &x->vbus_nb); if (ret < 0) { dev_err(x->dev, "register VBUS notifier failed\n"); return ret; } } else { x->type_nb.notifier_call = usb_phy_get_charger_type; ret = devm_extcon_register_notifier(x->dev, x->edev, EXTCON_CHG_USB_SDP, &x->type_nb); if (ret) { dev_err(x->dev, "register extcon USB SDP failed.\n"); return ret; } ret = devm_extcon_register_notifier(x->dev, x->edev, EXTCON_CHG_USB_CDP, &x->type_nb); if (ret) { dev_err(x->dev, "register extcon USB CDP failed.\n"); return ret; } ret = devm_extcon_register_notifier(x->dev, x->edev, EXTCON_CHG_USB_DCP, &x->type_nb); if (ret) { dev_err(x->dev, "register extcon USB DCP failed.\n"); return ret; } ret = devm_extcon_register_notifier(x->dev, x->edev, EXTCON_CHG_USB_ACA, &x->type_nb); if (ret) { dev_err(x->dev, "register extcon USB ACA failed.\n"); return ret; } } if (x->id_nb.notifier_call) { struct extcon_dev *id_ext; if (x->id_edev) id_ext = x->id_edev; else id_ext = x->edev; ret = devm_extcon_register_notifier(x->dev, id_ext, EXTCON_USB_HOST, &x->id_nb); if (ret < 0) { dev_err(x->dev, "register ID notifier failed\n"); return ret; } } } if (x->type_nb.notifier_call) __usb_phy_get_charger_type(x); return 0; } /** * devm_usb_get_phy - find the USB PHY * @dev - device that requests this phy * @type - the type of the phy the controller requires * * Gets the phy using usb_get_phy(), and associates a device with it using * devres. On driver detach, release function is invoked on the devres data, * then, devres data is freed. * * For use by USB host and peripheral drivers. */ struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type) { struct usb_phy **ptr, *phy; ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); if (!ptr) return ERR_PTR(-ENOMEM); phy = usb_get_phy(type); if (!IS_ERR(phy)) { *ptr = phy; devres_add(dev, ptr); } else devres_free(ptr); return phy; } EXPORT_SYMBOL_GPL(devm_usb_get_phy); /** * usb_get_phy - find the USB PHY * @type - the type of the phy the controller requires * * Returns the phy driver, after getting a refcount to it; or * -ENODEV if there is no such phy. The caller is responsible for * calling usb_put_phy() to release that count. * * For use by USB host and peripheral drivers. */ struct usb_phy *usb_get_phy(enum usb_phy_type type) { struct usb_phy *phy = NULL; unsigned long flags; spin_lock_irqsave(&phy_lock, flags); phy = __usb_find_phy(&phy_list, type); if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { pr_debug("PHY: unable to find transceiver of type %s\n", usb_phy_type_string(type)); if (!IS_ERR(phy)) phy = ERR_PTR(-ENODEV); goto err0; } get_device(phy->dev); err0: spin_unlock_irqrestore(&phy_lock, flags); return phy; } EXPORT_SYMBOL_GPL(usb_get_phy); /** * devm_usb_get_phy_by_node - find the USB PHY by device_node * @dev - device that requests this phy * @node - the device_node for the phy device. * @nb - a notifier_block to register with the phy. * * Returns the phy driver associated with the given device_node, * after getting a refcount to it, -ENODEV if there is no such phy or * -EPROBE_DEFER if the device is not yet loaded. While at that, it * also associates the device with * the phy using devres. On driver detach, release function is invoked * on the devres data, then, devres data is freed. * * For use by peripheral drivers for devices related to a phy, * such as a charger. */ struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, struct device_node *node, struct notifier_block *nb) { struct usb_phy *phy = ERR_PTR(-ENOMEM); struct phy_devm *ptr; unsigned long flags; ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL); if (!ptr) { dev_dbg(dev, "failed to allocate memory for devres\n"); goto err0; } spin_lock_irqsave(&phy_lock, flags); phy = __of_usb_find_phy(node); if (IS_ERR(phy)) { devres_free(ptr); goto err1; } if (!try_module_get(phy->dev->driver->owner)) { phy = ERR_PTR(-ENODEV); devres_free(ptr); goto err1; } if (nb) usb_register_notifier(phy, nb); ptr->phy = phy; ptr->nb = nb; devres_add(dev, ptr); get_device(phy->dev); err1: spin_unlock_irqrestore(&phy_lock, flags); err0: return phy; } EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node); /** * devm_usb_get_phy_by_phandle - find the USB PHY by phandle * @dev - device that requests this phy * @phandle - name of the property holding the phy phandle value * @index - the index of the phy * * Returns the phy driver associated with the given phandle value, * after getting a refcount to it, -ENODEV if there is no such phy or * -EPROBE_DEFER if there is a phandle to the phy, but the device is * not yet loaded. While at that, it also associates the device with * the phy using devres. On driver detach, release function is invoked * on the devres data, then, devres data is freed. * * For use by USB host and peripheral drivers. */ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, const char *phandle, u8 index) { struct device_node *node; struct usb_phy *phy; if (!dev->of_node) { dev_dbg(dev, "device does not have a device node entry\n"); return ERR_PTR(-EINVAL); } node = of_parse_phandle(dev->of_node, phandle, index); if (!node) { dev_dbg(dev, "failed to get %s phandle in %pOF node\n", phandle, dev->of_node); return ERR_PTR(-ENODEV); } phy = devm_usb_get_phy_by_node(dev, node, NULL); of_node_put(node); return phy; } EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); /** * devm_usb_put_phy - release the USB PHY * @dev - device that wants to release this phy * @phy - the phy returned by devm_usb_get_phy() * * destroys the devres associated with this phy and invokes usb_put_phy * to release the phy. * * For use by USB host and peripheral drivers. */ void devm_usb_put_phy(struct device *dev, struct usb_phy *phy) { int r; r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy); dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); } EXPORT_SYMBOL_GPL(devm_usb_put_phy); /** * usb_put_phy - release the USB PHY * @x: the phy returned by usb_get_phy() * * Releases a refcount the caller received from usb_get_phy(). * * For use by USB host and peripheral drivers. */ void usb_put_phy(struct usb_phy *x) { if (x) { struct module *owner = x->dev->driver->owner; put_device(x->dev); module_put(owner); } } EXPORT_SYMBOL_GPL(usb_put_phy); /** * usb_add_phy - declare the USB PHY * @x: the USB phy to be used; or NULL * @type - the type of this PHY * * This call is exclusively for use by phy drivers, which * coordinate the activities of drivers for host and peripheral * controllers, and in some cases for VBUS current regulation. */ int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) { int ret = 0; unsigned long flags; struct usb_phy *phy; if (x->type != USB_PHY_TYPE_UNDEFINED) { dev_err(x->dev, "not accepting initialized PHY %s\n", x->label); return -EINVAL; } usb_charger_init(x); ret = usb_add_extcon(x); if (ret) return ret; ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); spin_lock_irqsave(&phy_lock, flags); list_for_each_entry(phy, &phy_list, head) { if (phy->type == type) { ret = -EBUSY; dev_err(x->dev, "transceiver type %s already exists\n", usb_phy_type_string(type)); goto out; } } x->type = type; list_add_tail(&x->head, &phy_list); out: spin_unlock_irqrestore(&phy_lock, flags); return ret; } EXPORT_SYMBOL_GPL(usb_add_phy); /** * usb_add_phy_dev - declare the USB PHY * @x: the USB phy to be used; or NULL * * This call is exclusively for use by phy drivers, which * coordinate the activities of drivers for host and peripheral * controllers, and in some cases for VBUS current regulation. */ int usb_add_phy_dev(struct usb_phy *x) { unsigned long flags; int ret; if (!x->dev) { dev_err(x->dev, "no device provided for PHY\n"); return -EINVAL; } usb_charger_init(x); ret = usb_add_extcon(x); if (ret) return ret; ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); spin_lock_irqsave(&phy_lock, flags); list_add_tail(&x->head, &phy_list); spin_unlock_irqrestore(&phy_lock, flags); return 0; } EXPORT_SYMBOL_GPL(usb_add_phy_dev); /** * usb_remove_phy - remove the OTG PHY * @x: the USB OTG PHY to be removed; * * This reverts the effects of usb_add_phy */ void usb_remove_phy(struct usb_phy *x) { unsigned long flags; spin_lock_irqsave(&phy_lock, flags); if (x) list_del(&x->head); spin_unlock_irqrestore(&phy_lock, flags); } EXPORT_SYMBOL_GPL(usb_remove_phy); /** * usb_phy_set_event - set event to phy event * @x: the phy returned by usb_get_phy(); * * This sets event to phy event */ void usb_phy_set_event(struct usb_phy *x, unsigned long event) { x->last_event = event; } EXPORT_SYMBOL_GPL(usb_phy_set_event);
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