最終更新:2014-05-18 (日) 12:21:11 (3623d)
linux/usb/hcd.h?usb_hcd
Top / usb_hcd
struct usb_hcd { /* * housekeeping */ struct usb_bus self; /* hcd is-a bus */ struct kref kref; /* reference counter */ const char *product_desc; /* product/vendor string */ int speed; /* Speed for this roothub. * May be different from * hcd->driver->flags & HCD_MASK */ char irq_descr[24]; /* driver + bus # */ struct timer_list rh_timer; /* drives root-hub polling */ struct urb *status_urb; /* the current status urb */ #ifdef CONFIG_PM_RUNTIME struct work_struct wakeup_work; /* for remote wakeup */ #endif /* * hardware info/state */ const struct hc_driver *driver; /* hw-specific hooks */ /* * OTG and some Host controllers need software interaction with phys; * other external phys should be software-transparent */ struct usb_phy *phy; /* Flags that need to be manipulated atomically because they can * change while the host controller is running. Always use * set_bit() or clear_bit() to change their values. */ unsigned long flags; #define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */ #define HCD_FLAG_POLL_RH 2 /* poll for rh status? */ #define HCD_FLAG_POLL_PENDING 3 /* status has changed? */ #define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */ #define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */ #define HCD_FLAG_DEAD 6 /* controller has died? */ /* The flags can be tested using these macros; they are likely to * be slightly faster than test_bit(). */ #define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE)) #define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH)) #define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING)) #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING)) #define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING)) #define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD)) /* Flags that get set only during HCD registration or removal. */ unsigned rh_registered:1;/* is root hub registered? */ unsigned rh_pollable:1; /* may we poll the root hub? */ unsigned msix_enabled:1; /* driver has MSI-X enabled? */ unsigned remove_phy:1; /* auto-remove USB phy */ /* The next flag is a stopgap, to be removed when all the HCDs * support the new root-hub polling mechanism. */ unsigned uses_new_polling:1; unsigned wireless:1; /* Wireless USB HCD */ unsigned authorized_default:1; unsigned has_tt:1; /* Integrated TT in root hub */ unsigned amd_resume_bug:1; /* AMD remote wakeup quirk */ unsigned int irq; /* irq allocated */ void __iomem *regs; /* device memory/io */ resource_size_t rsrc_start; /* memory/io resource start */ resource_size_t rsrc_len; /* memory/io resource length */ unsigned power_budget; /* in mA, 0 = no limit */ struct giveback_urb_bh high_prio_bh; struct giveback_urb_bh low_prio_bh; /* bandwidth_mutex should be taken before adding or removing * any new bus bandwidth constraints: * 1. Before adding a configuration for a new device. * 2. Before removing the configuration to put the device into * the addressed state. * 3. Before selecting a different configuration. * 4. Before selecting an alternate interface setting. * * bandwidth_mutex should be dropped after a successful control message * to the device, or resetting the bandwidth after a failed attempt. */ struct mutex *bandwidth_mutex; struct usb_hcd *shared_hcd; struct usb_hcd *primary_hcd; #define HCD_BUFFER_POOLS 4 struct dma_pool *pool[HCD_BUFFER_POOLS]; int state; # define __ACTIVE 0x01 # define __SUSPEND 0x04 # define __TRANSIENT 0x80 # define HC_STATE_HALT 0 # define HC_STATE_RUNNING (__ACTIVE) # define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE) # define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT) # define HC_STATE_SUSPENDED (__SUSPEND) #define HC_IS_RUNNING(state) ((state) & __ACTIVE) #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND) /* more shared queuing code would be good; it should support * smarter scheduling, handle transaction translators, etc; * input size of periodic table to an interrupt scheduler. * (ohci 32, uhci 1024, ehci 256/512/1024). */ /* The HC driver's private data is stored at the end of * this structure. */ unsigned long hcd_priv[0] __attribute__ ((aligned(sizeof(s64)))); };
