1 /* 2 * usb hub driver head file 3 * 4 * Copyright (C) 1999 Linus Torvalds 5 * Copyright (C) 1999 Johannes Erdfelt 6 * Copyright (C) 1999 Gregory P. Smith 7 * Copyright (C) 2001 Brad Hards (bhards@bigpond.net.au) 8 * Copyright (C) 2012 Intel Corp (tianyu.lan@intel.com) 9 * 10 * move struct usb_hub to this file. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 18 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 19 * for more details. 20 */ 21 22 #include <linux/usb.h> 23 #include <linux/usb/ch11.h> 24 #include <linux/usb/hcd.h> 25 #include "usb.h" 26 27 struct usb_hub { 28 struct device *intfdev; /* the "interface" device */ 29 struct usb_device *hdev; 30 struct kref kref; 31 struct urb *urb; /* for interrupt polling pipe */ 32 33 /* buffer for urb ... with extra space in case of babble */ 34 u8 (*buffer)[8]; 35 union { 36 struct usb_hub_status hub; 37 struct usb_port_status port; 38 } *status; /* buffer for status reports */ 39 struct mutex status_mutex; /* for the status buffer */ 40 41 int error; /* last reported error */ 42 int nerrors; /* track consecutive errors */ 43 44 struct list_head event_list; /* hubs w/data or errs ready */ 45 unsigned long event_bits[1]; /* status change bitmask */ 46 unsigned long change_bits[1]; /* ports with logical connect 47 status change */ 48 unsigned long busy_bits[1]; /* ports being reset or 49 resumed */ 50 unsigned long removed_bits[1]; /* ports with a "removed" 51 device present */ 52 unsigned long wakeup_bits[1]; /* ports that have signaled 53 remote wakeup */ 54 #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */ 55 #error event_bits[] is too short! 56 #endif 57 58 struct usb_hub_descriptor *descriptor; /* class descriptor */ 59 struct usb_tt tt; /* Transaction Translator */ 60 61 unsigned mA_per_port; /* current for each child */ 62 #ifdef CONFIG_PM 63 unsigned wakeup_enabled_descendants; 64 #endif 65 66 unsigned limited_power:1; 67 unsigned quiescing:1; 68 unsigned disconnected:1; 69 70 unsigned quirk_check_port_auto_suspend:1; 71 72 unsigned has_indicators:1; 73 u8 indicator[USB_MAXCHILDREN]; 74 struct delayed_work leds; 75 struct delayed_work init_work; 76 struct usb_port **ports; 77 }; 78 79 /** 80 * struct usb port - kernel's representation of a usb port 81 * @child: usb device attatched to the port 82 * @dev: generic device interface 83 * @port_owner: port's owner 84 * @connect_type: port's connect type 85 * @portnum: port index num based one 86 * @power_is_on: port's power state 87 * @did_runtime_put: port has done pm_runtime_put(). 88 */ 89 struct usb_port { 90 struct usb_device *child; 91 struct device dev; 92 struct dev_state *port_owner; 93 enum usb_port_connect_type connect_type; 94 u8 portnum; 95 unsigned power_is_on:1; 96 unsigned did_runtime_put:1; 97 }; 98 99 #define to_usb_port(_dev) \ 100 container_of(_dev, struct usb_port, dev) 101 102 extern int usb_hub_create_port_device(struct usb_hub *hub, 103 int port1); 104 extern void usb_hub_remove_port_device(struct usb_hub *hub, 105 int port1); 106 extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub, 107 int port1, bool set); 108 extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev); 109 extern int hub_port_debounce(struct usb_hub *hub, int port1, 110 bool must_be_connected); 111 extern int usb_clear_port_feature(struct usb_device *hdev, 112 int port1, int feature); 113 114 static inline int hub_port_debounce_be_connected(struct usb_hub *hub, 115 int port1) 116 { 117 return hub_port_debounce(hub, port1, true); 118 } 119 120 static inline int hub_port_debounce_be_stable(struct usb_hub *hub, 121 int port1) 122 { 123 return hub_port_debounce(hub, port1, false); 124 } 125 126