LCOV - code coverage report
Current view: top level - lkbce/drivers/usb/core - hcd.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2001-2002 by David Brownell
       3             :  *
       4             :  * This program is free software; you can redistribute it and/or modify it
       5             :  * under the terms of the GNU General Public License as published by the
       6             :  * Free Software Foundation; either version 2 of the License, or (at your
       7             :  * option) any later version.
       8             :  *
       9             :  * This program is distributed in the hope that it will be useful, but
      10             :  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      11             :  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      12             :  * for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU General Public License
      15             :  * along with this program; if not, write to the Free Software Foundation,
      16             :  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
      17             :  */
      18             : 
      19             : #ifndef __USB_CORE_HCD_H
      20             : #define __USB_CORE_HCD_H
      21             : 
      22             : #ifdef __KERNEL__
      23             : 
      24             : #include <linux/rwsem.h>
      25             : 
      26             : #define MAX_TOPO_LEVEL          6
      27             : 
      28             : /* This file contains declarations of usbcore internals that are mostly
      29             :  * used or exposed by Host Controller Drivers.
      30             :  */
      31             : 
      32             : /*
      33             :  * USB Packet IDs (PIDs)
      34             :  */
      35             : #define USB_PID_EXT                     0xf0    /* USB 2.0 LPM ECN */
      36             : #define USB_PID_OUT                     0xe1
      37             : #define USB_PID_ACK                     0xd2
      38             : #define USB_PID_DATA0                   0xc3
      39             : #define USB_PID_PING                    0xb4    /* USB 2.0 */
      40             : #define USB_PID_SOF                     0xa5
      41             : #define USB_PID_NYET                    0x96    /* USB 2.0 */
      42             : #define USB_PID_DATA2                   0x87    /* USB 2.0 */
      43             : #define USB_PID_SPLIT                   0x78    /* USB 2.0 */
      44             : #define USB_PID_IN                      0x69
      45             : #define USB_PID_NAK                     0x5a
      46             : #define USB_PID_DATA1                   0x4b
      47             : #define USB_PID_PREAMBLE                0x3c    /* Token mode */
      48             : #define USB_PID_ERR                     0x3c    /* USB 2.0: handshake mode */
      49             : #define USB_PID_SETUP                   0x2d
      50             : #define USB_PID_STALL                   0x1e
      51             : #define USB_PID_MDATA                   0x0f    /* USB 2.0 */
      52             : 
      53             : /*-------------------------------------------------------------------------*/
      54             : 
      55             : /*
      56             :  * USB Host Controller Driver (usb_hcd) framework
      57             :  *
      58             :  * Since "struct usb_bus" is so thin, you can't share much code in it.
      59             :  * This framework is a layer over that, and should be more sharable.
      60             :  *
      61             :  * @authorized_default: Specifies if new devices are authorized to
      62             :  *                      connect by default or they require explicit
      63             :  *                      user space authorization; this bit is settable
      64             :  *                      through /sys/class/usb_host/X/authorized_default.
      65             :  *                      For the rest is RO, so we don't lock to r/w it.
      66             :  */
      67             : 
      68             : /*-------------------------------------------------------------------------*/
      69             : 
      70             : struct usb_hcd {
      71             : 
      72             :         /*
      73             :          * housekeeping
      74             :          */
      75             :         struct usb_bus          self;           /* hcd is-a bus */
      76             :         struct kref             kref;           /* reference counter */
      77             : 
      78             :         const char              *product_desc;  /* product/vendor string */
      79             :         char                    irq_descr[24];  /* driver + bus # */
      80             : 
      81             :         struct timer_list       rh_timer;       /* drives root-hub polling */
      82             :         struct urb              *status_urb;    /* the current status urb */
      83             : #ifdef CONFIG_PM
      84             :         struct work_struct      wakeup_work;    /* for remote wakeup */
      85             : #endif
      86             : 
      87             :         /*
      88             :          * hardware info/state
      89             :          */
      90             :         const struct hc_driver  *driver;        /* hw-specific hooks */
      91             : 
      92             :         /* Flags that need to be manipulated atomically */
      93             :         unsigned long           flags;
      94             : #define HCD_FLAG_HW_ACCESSIBLE  0x00000001
      95             : #define HCD_FLAG_SAW_IRQ        0x00000002
      96             : 
      97             :         unsigned                rh_registered:1;/* is root hub registered? */
      98             : 
      99             :         /* The next flag is a stopgap, to be removed when all the HCDs
     100             :          * support the new root-hub polling mechanism. */
     101             :         unsigned                uses_new_polling:1;
     102             :         unsigned                poll_rh:1;      /* poll for rh status? */
     103             :         unsigned                poll_pending:1; /* status has changed? */
     104             :         unsigned                wireless:1;     /* Wireless USB HCD */
     105             :         unsigned                authorized_default:1;
     106             :         unsigned                has_tt:1;       /* Integrated TT in root hub */
     107             : 
     108             :         int                     irq;            /* irq allocated */
     109             :         void __iomem            *regs;          /* device memory/io */
     110             :         u64                     rsrc_start;     /* memory/io resource start */
     111             :         u64                     rsrc_len;       /* memory/io resource length */
     112             :         unsigned                power_budget;   /* in mA, 0 = no limit */
     113             : 
     114             :         /* bandwidth_mutex should be taken before adding or removing
     115             :          * any new bus bandwidth constraints:
     116             :          *   1. Before adding a configuration for a new device.
     117             :          *   2. Before removing the configuration to put the device into
     118             :          *      the addressed state.
     119             :          *   3. Before selecting a different configuration.
     120             :          *   4. Before selecting an alternate interface setting.
     121             :          *
     122             :          * bandwidth_mutex should be dropped after a successful control message
     123             :          * to the device, or resetting the bandwidth after a failed attempt.
     124             :          */
     125             :         struct mutex            bandwidth_mutex;
     126             : 
     127             : 
     128             : #define HCD_BUFFER_POOLS        4
     129             :         struct dma_pool         *pool [HCD_BUFFER_POOLS];
     130             : 
     131             :         int                     state;
     132             : #       define  __ACTIVE                0x01
     133             : #       define  __SUSPEND               0x04
     134             : #       define  __TRANSIENT             0x80
     135             : 
     136             : #       define  HC_STATE_HALT           0
     137             : #       define  HC_STATE_RUNNING        (__ACTIVE)
     138             : #       define  HC_STATE_QUIESCING      (__SUSPEND|__TRANSIENT|__ACTIVE)
     139             : #       define  HC_STATE_RESUMING       (__SUSPEND|__TRANSIENT)
     140             : #       define  HC_STATE_SUSPENDED      (__SUSPEND)
     141             : 
     142             : #define HC_IS_RUNNING(state) ((state) & __ACTIVE)
     143             : #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
     144             : 
     145             :         /* more shared queuing code would be good; it should support
     146             :          * smarter scheduling, handle transaction translators, etc;
     147             :          * input size of periodic table to an interrupt scheduler.
     148             :          * (ohci 32, uhci 1024, ehci 256/512/1024).
     149             :          */
     150             : 
     151             :         /* The HC driver's private data is stored at the end of
     152             :          * this structure.
     153             :          */
     154             :         unsigned long hcd_priv[0]
     155             :                         __attribute__ ((aligned(sizeof(unsigned long))));
     156             : };
     157             : 
     158             : /* 2.4 does this a bit differently ... */
     159             : static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
     160             : {
     161             :         return &hcd->self;
     162             : }
     163             : 
     164             : static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
     165             : {
     166             :         return container_of(bus, struct usb_hcd, self);
     167             : }
     168             : 
     169             : struct hcd_timeout {    /* timeouts we allocate */
     170             :         struct list_head        timeout_list;
     171             :         struct timer_list       timer;
     172             : };
     173           1 : 
     174             : /*-------------------------------------------------------------------------*/
     175             : 
     176             : 
     177             : struct hc_driver {
     178             :         const char      *description;   /* "ehci-hcd" etc */
     179             :         const char      *product_desc;  /* product/vendor string */
     180             :         size_t          hcd_priv_size;  /* size of private data */
     181             : 
     182             :         /* irq handler */
     183             :         irqreturn_t     (*irq) (struct usb_hcd *hcd);
     184             : 
     185             :         int     flags;
     186             : #define HCD_MEMORY      0x0001          /* HC regs use memory (else I/O) */
     187             : #define HCD_LOCAL_MEM   0x0002          /* HC needs local memory */
     188             : #define HCD_USB11       0x0010          /* USB 1.1 */
     189             : #define HCD_USB2        0x0020          /* USB 2.0 */
     190             : #define HCD_USB3        0x0040          /* USB 3.0 */
     191             : #define HCD_MASK        0x0070
     192             : 
     193             :         /* called to init HCD and root hub */
     194             :         int     (*reset) (struct usb_hcd *hcd);
     195             :         int     (*start) (struct usb_hcd *hcd);
     196             : 
     197             :         /* NOTE:  these suspend/resume calls relate to the HC as
     198             :          * a whole, not just the root hub; they're for PCI bus glue.
     199             :          */
     200             :         /* called after suspending the hub, before entering D3 etc */
     201             :         int     (*pci_suspend)(struct usb_hcd *hcd);
     202             : 
     203             :         /* called after entering D0 (etc), before resuming the hub */
     204             :         int     (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
     205             : 
     206             :         /* cleanly make HCD stop writing memory and doing I/O */
     207             :         void    (*stop) (struct usb_hcd *hcd);
     208             : 
     209             :         /* shutdown HCD */
     210             :         void    (*shutdown) (struct usb_hcd *hcd);
     211             : 
     212             :         /* return current frame number */
     213             :         int     (*get_frame_number) (struct usb_hcd *hcd);
     214             : 
     215             :         /* manage i/o requests, device state */
     216             :         int     (*urb_enqueue)(struct usb_hcd *hcd,
     217             :                                 struct urb *urb, gfp_t mem_flags);
     218             :         int     (*urb_dequeue)(struct usb_hcd *hcd,
     219             :                                 struct urb *urb, int status);
     220             : 
     221             :         /* hw synch, freeing endpoint resources that urb_dequeue can't */
     222             :         void    (*endpoint_disable)(struct usb_hcd *hcd,
     223             :                         struct usb_host_endpoint *ep);
     224             : 
     225             :         /* (optional) reset any endpoint state such as sequence number
     226             :            and current window */
     227             :         void    (*endpoint_reset)(struct usb_hcd *hcd,
     228             :                         struct usb_host_endpoint *ep);
     229             : 
     230             :         /* root hub support */
     231             :         int     (*hub_status_data) (struct usb_hcd *hcd, char *buf);
     232             :         int     (*hub_control) (struct usb_hcd *hcd,
     233             :                                 u16 typeReq, u16 wValue, u16 wIndex,
     234             :                                 char *buf, u16 wLength);
     235             :         int     (*bus_suspend)(struct usb_hcd *);
     236             :         int     (*bus_resume)(struct usb_hcd *);
     237             :         int     (*start_port_reset)(struct usb_hcd *, unsigned port_num);
     238             : 
     239             :                 /* force handover of high-speed port to full-speed companion */
     240             :         void    (*relinquish_port)(struct usb_hcd *, int);
     241             :                 /* has a port been handed over to a companion? */
     242             :         int     (*port_handed_over)(struct usb_hcd *, int);
     243             : 
     244             :                 /* CLEAR_TT_BUFFER completion callback */
     245             :         void    (*clear_tt_buffer_complete)(struct usb_hcd *,
     246             :                                 struct usb_host_endpoint *);
     247             : 
     248             :         /* xHCI specific functions */
     249             :                 /* Called by usb_alloc_dev to alloc HC device structures */
     250             :         int     (*alloc_dev)(struct usb_hcd *, struct usb_device *);
     251             :                 /* Called by usb_disconnect to free HC device structures */
     252             :         void    (*free_dev)(struct usb_hcd *, struct usb_device *);
     253             : 
     254             :         /* Bandwidth computation functions */
     255             :         /* Note that add_endpoint() can only be called once per endpoint before
     256             :          * check_bandwidth() or reset_bandwidth() must be called.
     257             :          * drop_endpoint() can only be called once per endpoint also.
     258             :          * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
     259             :          * add the endpoint to the schedule with possibly new parameters denoted by a
     260             :          * different endpoint descriptor in usb_host_endpoint.
     261             :          * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
     262             :          * not allowed.
     263             :          */
     264             :                 /* Allocate endpoint resources and add them to a new schedule */
     265             :         int     (*add_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
     266             :                 /* Drop an endpoint from a new schedule */
     267             :         int     (*drop_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
     268             :                 /* Check that a new hardware configuration, set using
     269             :                  * endpoint_enable and endpoint_disable, does not exceed bus
     270             :                  * bandwidth.  This must be called before any set configuration
     271             :                  * or set interface requests are sent to the device.
     272             :                  */
     273             :         int     (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
     274             :                 /* Reset the device schedule to the last known good schedule,
     275             :                  * which was set from a previous successful call to
     276             :                  * check_bandwidth().  This reverts any add_endpoint() and
     277             :                  * drop_endpoint() calls since that last successful call.
     278             :                  * Used for when a check_bandwidth() call fails due to resource
     279             :                  * or bandwidth constraints.
     280             :                  */
     281             :         void    (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
     282             :                 /* Returns the hardware-chosen device address */
     283             :         int     (*address_device)(struct usb_hcd *, struct usb_device *udev);
     284             :                 /* Notifies the HCD after a hub descriptor is fetched.
     285             :                  * Will block.
     286             :                  */
     287             :         int     (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
     288             :                         struct usb_tt *tt, gfp_t mem_flags);
     289             : };
     290             : 
     291             : extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
     292             : extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
     293             :                 int status);
     294             : extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
     295             : 
     296             : extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
     297             : extern int usb_hcd_unlink_urb(struct urb *urb, int status);
     298             : extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
     299             :                 int status);
     300             : extern void usb_hcd_flush_endpoint(struct usb_device *udev,
     301             :                 struct usb_host_endpoint *ep);
     302             : extern void usb_hcd_disable_endpoint(struct usb_device *udev,
     303             :                 struct usb_host_endpoint *ep);
     304             : extern void usb_hcd_reset_endpoint(struct usb_device *udev,
     305             :                 struct usb_host_endpoint *ep);
     306             : extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
     307             : extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
     308             :                 struct usb_host_config *new_config,
     309             :                 struct usb_host_interface *old_alt,
     310             :                 struct usb_host_interface *new_alt);
     311             : extern int usb_hcd_get_frame_number(struct usb_device *udev);
     312             : 
     313             : extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
     314             :                 struct device *dev, const char *bus_name);
     315             : extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
     316             : extern void usb_put_hcd(struct usb_hcd *hcd);
     317             : extern int usb_add_hcd(struct usb_hcd *hcd,
     318             :                 unsigned int irqnum, unsigned long irqflags);
     319             : extern void usb_remove_hcd(struct usb_hcd *hcd);
     320             : 
     321             : struct platform_device;
     322             : extern void usb_hcd_platform_shutdown(struct platform_device *dev);
     323             : 
     324             : #ifdef CONFIG_PCI
     325             : struct pci_dev;
     326             : struct pci_device_id;
     327             : extern int usb_hcd_pci_probe(struct pci_dev *dev,
     328             :                                 const struct pci_device_id *id);
     329             : extern void usb_hcd_pci_remove(struct pci_dev *dev);
     330             : extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
     331             : 
     332             : #ifdef CONFIG_PM_SLEEP
     333             : extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
     334             : #endif
     335             : #endif /* CONFIG_PCI */
     336             : 
     337             : /* pci-ish (pdev null is ok) buffer alloc/mapping support */
     338             : int hcd_buffer_create(struct usb_hcd *hcd);
     339             : void hcd_buffer_destroy(struct usb_hcd *hcd);
     340             : 
     341             : void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
     342             :         gfp_t mem_flags, dma_addr_t *dma);
     343             : void hcd_buffer_free(struct usb_bus *bus, size_t size,
     344             :         void *addr, dma_addr_t dma);
     345             : 
     346             : /* generic bus glue, needed for host controllers that don't use PCI */
     347             : extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
     348             : 
     349             : extern void usb_hc_died(struct usb_hcd *hcd);
     350             : extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
     351             : 
     352             : /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
     353             : #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
     354             : #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << (ep)))
     355             : #define usb_settoggle(dev, ep, out, bit) \
     356             :                 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
     357             :                  ((bit) << (ep)))
     358             : 
     359             : /* -------------------------------------------------------------------------- */
     360             : 
     361             : /* Enumeration is only for the hub driver, or HCD virtual root hubs */
     362             : extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
     363             :                                         struct usb_bus *, unsigned port);
     364             : extern int usb_new_device(struct usb_device *dev);
     365             : extern void usb_disconnect(struct usb_device **);
     366             : 
     367             : extern int usb_get_configuration(struct usb_device *dev);
     368             : extern void usb_destroy_configuration(struct usb_device *dev);
     369             : 
     370             : /*-------------------------------------------------------------------------*/
     371             : 
     372             : /*
     373             :  * HCD Root Hub support
     374             :  */
     375             : 
     376             : #include "hub.h"
     377             : 
     378             : /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
     379             : #define DeviceRequest \
     380             :         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
     381             : #define DeviceOutRequest \
     382             :         ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
     383             : 
     384             : #define InterfaceRequest \
     385             :         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
     386             : 
     387             : #define EndpointRequest \
     388             :         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
     389             : #define EndpointOutRequest \
     390             :         ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
     391             : 
     392             : /* class requests from the USB 2.0 hub spec, table 11-15 */
     393             : /* GetBusState and SetHubDescriptor are optional, omitted */
     394             : #define ClearHubFeature         (0x2000 | USB_REQ_CLEAR_FEATURE)
     395             : #define ClearPortFeature        (0x2300 | USB_REQ_CLEAR_FEATURE)
     396             : #define GetHubDescriptor        (0xa000 | USB_REQ_GET_DESCRIPTOR)
     397             : #define GetHubStatus            (0xa000 | USB_REQ_GET_STATUS)
     398             : #define GetPortStatus           (0xa300 | USB_REQ_GET_STATUS)
     399             : #define SetHubFeature           (0x2000 | USB_REQ_SET_FEATURE)
     400             : #define SetPortFeature          (0x2300 | USB_REQ_SET_FEATURE)
     401             : 
     402             : 
     403             : /*-------------------------------------------------------------------------*/
     404             : 
     405             : /*
     406             :  * Generic bandwidth allocation constants/support
     407             :  */
     408             : #define FRAME_TIME_USECS        1000L
     409             : #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
     410             :                 /* Trying not to use worst-case bit-stuffing
     411             :                  * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
     412             :                 /* bytecount = data payload byte count */
     413             : 
     414             : #define NS_TO_US(ns)    ((ns + 500L) / 1000L)
     415             :                         /* convert & round nanoseconds to microseconds */
     416             : 
     417             : 
     418             : /*
     419             :  * Full/low speed bandwidth allocation constants/support.
     420             :  */
     421             : #define BW_HOST_DELAY   1000L           /* nanoseconds */
     422             : #define BW_HUB_LS_SETUP 333L            /* nanoseconds */
     423             :                         /* 4 full-speed bit times (est.) */
     424             : 
     425             : #define FRAME_TIME_BITS                 12000L  /* frame = 1 millisecond */
     426             : #define FRAME_TIME_MAX_BITS_ALLOC       (90L * FRAME_TIME_BITS / 100L)
     427             : #define FRAME_TIME_MAX_USECS_ALLOC      (90L * FRAME_TIME_USECS / 100L)
     428             : 
     429             : /*
     430             :  * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
     431             :  * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
     432             :  * to preallocate bandwidth)
     433             :  */
     434             : #define USB2_HOST_DELAY 5       /* nsec, guess */
     435             : #define HS_NSECS(bytes) (((55 * 8 * 2083) \
     436             :         + (2083UL * (3 + BitTime(bytes))))/1000 \
     437             :         + USB2_HOST_DELAY)
     438             : #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
     439             :         + (2083UL * (3 + BitTime(bytes))))/1000 \
     440             :         + USB2_HOST_DELAY)
     441             : #define HS_USECS(bytes) NS_TO_US (HS_NSECS(bytes))
     442             : #define HS_USECS_ISO(bytes) NS_TO_US (HS_NSECS_ISO(bytes))
     443             : 
     444             : extern long usb_calc_bus_time(int speed, int is_input,
     445             :                         int isoc, int bytecount);
     446             : 
     447             : /*-------------------------------------------------------------------------*/
     448             : 
     449             : extern void usb_set_device_state(struct usb_device *udev,
     450             :                 enum usb_device_state new_state);
     451             : 
     452             : /*-------------------------------------------------------------------------*/
     453             : 
     454             : /* exported only within usbcore */
     455             : 
     456             : extern struct list_head usb_bus_list;
     457             : extern struct mutex usb_bus_list_lock;
     458             : extern wait_queue_head_t usb_kill_urb_queue;
     459             : 
     460             : extern int usb_find_interface_driver(struct usb_device *dev,
     461             :         struct usb_interface *interface);
     462             : 
     463             : #define usb_endpoint_out(ep_dir)        (!((ep_dir) & USB_DIR_IN))
     464             : 
     465             : #ifdef CONFIG_PM
     466             : extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
     467             : extern void usb_root_hub_lost_power(struct usb_device *rhdev);
     468             : extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
     469             : extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
     470             : #else
     471             : static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
     472             : {
     473             :         return;
     474             : }
     475             : #endif /* CONFIG_PM */
     476             : 
     477             : /*
     478             :  * USB device fs stuff
     479             :  */
     480             : 
     481             : #ifdef CONFIG_USB_DEVICEFS
     482             : 
     483             : /*
     484             :  * these are expected to be called from the USB core/hub thread
     485             :  * with the kernel lock held
     486             :  */
     487             : extern void usbfs_update_special(void);
     488             : extern int usbfs_init(void);
     489             : extern void usbfs_cleanup(void);
     490             : 
     491             : #else /* CONFIG_USB_DEVICEFS */
     492             : 
     493             : static inline void usbfs_update_special(void) {}
     494             : static inline int usbfs_init(void) { return 0; }
     495             : static inline void usbfs_cleanup(void) { }
     496             : 
     497             : #endif /* CONFIG_USB_DEVICEFS */
     498             : 
     499             : /*-------------------------------------------------------------------------*/
     500             : 
     501             : #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
     502             : 
     503             : struct usb_mon_operations {
     504             :         void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
     505             :         void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
     506             :         void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
     507             :         /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
     508             : };
     509             : 
     510             : extern struct usb_mon_operations *mon_ops;
     511             : 
     512             : static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
     513             : {
     514             :         if (bus->monitored)
     515             :                 (*mon_ops->urb_submit)(bus, urb);
     516             : }
     517             : 
     518             : static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
     519             :     int error)
     520             : {
     521             :         if (bus->monitored)
     522             :                 (*mon_ops->urb_submit_error)(bus, urb, error);
     523             : }
     524             : 
     525             : static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
     526             :                 int status)
     527             : {
     528             :         if (bus->monitored)
     529             :                 (*mon_ops->urb_complete)(bus, urb, status);
     530             : }
     531             : 
     532             : int usb_mon_register(struct usb_mon_operations *ops);
     533             : void usb_mon_deregister(void);
     534             : 
     535             : #else
     536             : 
     537             : static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
     538             : static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
     539             :     int error) {}
     540             : static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
     541             :                 int status) {}
     542             : 
     543             : #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
     544             : 
     545             : /*-------------------------------------------------------------------------*/
     546             : 
     547             : /* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
     548             : /* bleech -- resurfaced in 2.4.11 or 2.4.12 */
     549             : #define bitmap  DeviceRemovable
     550             : 
     551             : 
     552             : /*-------------------------------------------------------------------------*/
     553             : 
     554             : /* random stuff */
     555             : 
     556             : #define RUN_CONTEXT (in_irq() ? "in_irq" \
     557             :                 : (in_interrupt() ? "in_interrupt" : "can sleep"))
     558             : 
     559             : 
     560             : /* This rwsem is for use only by the hub driver and ehci-hcd.
     561             :  * Nobody else should touch it.
     562             :  */
     563             : extern struct rw_semaphore ehci_cf_port_reset_rwsem;
     564             : 
     565             : /* Keep track of which host controller drivers are loaded */
     566             : #define USB_UHCI_LOADED         0
     567             : #define USB_OHCI_LOADED         1
     568             : #define USB_EHCI_LOADED         2
     569             : extern unsigned long usb_hcds_loaded;
     570             : 
     571             : #endif /* __KERNEL__ */
     572             : 
     573             : #endif /* __USB_CORE_HCD_H */

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