mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
167 lines
4.9 KiB
167 lines
4.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* |
|
* usb hub driver head file |
|
* |
|
* Copyright (C) 1999 Linus Torvalds |
|
* Copyright (C) 1999 Johannes Erdfelt |
|
* Copyright (C) 1999 Gregory P. Smith |
|
* Copyright (C) 2001 Brad Hards ([email protected]) |
|
* Copyright (C) 2012 Intel Corp ([email protected]) |
|
* |
|
* move struct usb_hub to this file. |
|
*/ |
|
|
|
#include <linux/usb.h> |
|
#include <linux/usb/ch11.h> |
|
#include <linux/usb/hcd.h> |
|
#include "usb.h" |
|
|
|
struct usb_hub { |
|
struct device *intfdev; /* the "interface" device */ |
|
struct usb_device *hdev; |
|
struct kref kref; |
|
struct urb *urb; /* for interrupt polling pipe */ |
|
|
|
/* buffer for urb ... with extra space in case of babble */ |
|
u8 (*buffer)[8]; |
|
union { |
|
struct usb_hub_status hub; |
|
struct usb_port_status port; |
|
} *status; /* buffer for status reports */ |
|
struct mutex status_mutex; /* for the status buffer */ |
|
|
|
int error; /* last reported error */ |
|
int nerrors; /* track consecutive errors */ |
|
|
|
unsigned long event_bits[1]; /* status change bitmask */ |
|
unsigned long change_bits[1]; /* ports with logical connect |
|
status change */ |
|
unsigned long removed_bits[1]; /* ports with a "removed" |
|
device present */ |
|
unsigned long wakeup_bits[1]; /* ports that have signaled |
|
remote wakeup */ |
|
unsigned long power_bits[1]; /* ports that are powered */ |
|
unsigned long child_usage_bits[1]; /* ports powered on for |
|
children */ |
|
unsigned long warm_reset_bits[1]; /* ports requesting warm |
|
reset recovery */ |
|
#if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */ |
|
#error event_bits[] is too short! |
|
#endif |
|
|
|
struct usb_hub_descriptor *descriptor; /* class descriptor */ |
|
struct usb_tt tt; /* Transaction Translator */ |
|
|
|
unsigned mA_per_port; /* current for each child */ |
|
#ifdef CONFIG_PM |
|
unsigned wakeup_enabled_descendants; |
|
#endif |
|
|
|
unsigned limited_power:1; |
|
unsigned quiescing:1; |
|
unsigned disconnected:1; |
|
unsigned in_reset:1; |
|
unsigned quirk_disable_autosuspend:1; |
|
|
|
unsigned quirk_check_port_auto_suspend:1; |
|
|
|
unsigned has_indicators:1; |
|
u8 indicator[USB_MAXCHILDREN]; |
|
struct delayed_work leds; |
|
struct delayed_work init_work; |
|
struct work_struct events; |
|
spinlock_t irq_urb_lock; |
|
struct timer_list irq_urb_retry; |
|
struct usb_port **ports; |
|
}; |
|
|
|
/** |
|
* struct usb port - kernel's representation of a usb port |
|
* @child: usb device attached to the port |
|
* @dev: generic device interface |
|
* @port_owner: port's owner |
|
* @peer: related usb2 and usb3 ports (share the same connector) |
|
* @req: default pm qos request for hubs without port power control |
|
* @connect_type: port's connect type |
|
* @location: opaque representation of platform connector location |
|
* @status_lock: synchronize port_event() vs usb_port_{suspend|resume} |
|
* @portnum: port index num based one |
|
* @is_superspeed cache super-speed status |
|
* @usb3_lpm_u1_permit: whether USB3 U1 LPM is permitted. |
|
* @usb3_lpm_u2_permit: whether USB3 U2 LPM is permitted. |
|
*/ |
|
struct usb_port { |
|
struct usb_device *child; |
|
struct device dev; |
|
struct usb_dev_state *port_owner; |
|
struct usb_port *peer; |
|
struct dev_pm_qos_request *req; |
|
enum usb_port_connect_type connect_type; |
|
usb_port_location_t location; |
|
struct mutex status_lock; |
|
u32 over_current_count; |
|
u8 portnum; |
|
u32 quirks; |
|
unsigned int is_superspeed:1; |
|
unsigned int usb3_lpm_u1_permit:1; |
|
unsigned int usb3_lpm_u2_permit:1; |
|
}; |
|
|
|
#define to_usb_port(_dev) \ |
|
container_of(_dev, struct usb_port, dev) |
|
|
|
extern int usb_hub_create_port_device(struct usb_hub *hub, |
|
int port1); |
|
extern void usb_hub_remove_port_device(struct usb_hub *hub, |
|
int port1); |
|
extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub, |
|
int port1, bool set); |
|
extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev); |
|
extern int hub_port_debounce(struct usb_hub *hub, int port1, |
|
bool must_be_connected); |
|
extern int usb_clear_port_feature(struct usb_device *hdev, |
|
int port1, int feature); |
|
|
|
static inline bool hub_is_port_power_switchable(struct usb_hub *hub) |
|
{ |
|
__le16 hcs; |
|
|
|
if (!hub) |
|
return false; |
|
hcs = hub->descriptor->wHubCharacteristics; |
|
return (le16_to_cpu(hcs) & HUB_CHAR_LPSM) < HUB_CHAR_NO_LPSM; |
|
} |
|
|
|
static inline int hub_is_superspeed(struct usb_device *hdev) |
|
{ |
|
return hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS; |
|
} |
|
|
|
static inline int hub_is_superspeedplus(struct usb_device *hdev) |
|
{ |
|
return (hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS && |
|
le16_to_cpu(hdev->descriptor.bcdUSB) >= 0x0310 && |
|
hdev->bos->ssp_cap); |
|
} |
|
|
|
static inline unsigned hub_power_on_good_delay(struct usb_hub *hub) |
|
{ |
|
unsigned delay = hub->descriptor->bPwrOn2PwrGood * 2; |
|
|
|
if (!hub->hdev->parent) /* root hub */ |
|
return delay; |
|
else /* Wait at least 100 msec for power to become stable */ |
|
return max(delay, 100U); |
|
} |
|
|
|
static inline int hub_port_debounce_be_connected(struct usb_hub *hub, |
|
int port1) |
|
{ |
|
return hub_port_debounce(hub, port1, true); |
|
} |
|
|
|
static inline int hub_port_debounce_be_stable(struct usb_hub *hub, |
|
int port1) |
|
{ |
|
return hub_port_debounce(hub, port1, false); |
|
}
|
|
|