root/include/linux/usb/hcd.h

INCLUDED FROM

DEFINITIONS

1. hcd_to_bus
2. bus_to_hcd
3. hcd_giveback_urb_in_bh
4. hcd_periodic_completion_in_progress
5. hcd_uses_dma
6. usb_wakeup_enabled_descendants
7. usb_hcd_resume_root_hub
8. usbmon_urb_submit
9. usbmon_urb_submit_error
10. usbmon_urb_complete
11. usbmon_urb_submit
12. usbmon_urb_submit_error
13. usbmon_urb_complete

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2001-2002 by David Brownell
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software Foundation,
  17  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 
  20 #ifndef __USB_CORE_HCD_H
  21 #define __USB_CORE_HCD_H
  22 
  23 #ifdef __KERNEL__
  24 
  25 #include <linux/rwsem.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/idr.h>
  28 
  29 #define MAX_TOPO_LEVEL          6
  30 
  31 /* This file contains declarations of usbcore internals that are mostly
  32  * used or exposed by Host Controller Drivers.
  33  */
  34 
  35 /*
  36  * USB Packet IDs (PIDs)
  37  */
  38 #define USB_PID_EXT                     0xf0    /* USB 2.0 LPM ECN */
  39 #define USB_PID_OUT                     0xe1
  40 #define USB_PID_ACK                     0xd2
  41 #define USB_PID_DATA0                   0xc3
  42 #define USB_PID_PING                    0xb4    /* USB 2.0 */
  43 #define USB_PID_SOF                     0xa5
  44 #define USB_PID_NYET                    0x96    /* USB 2.0 */
  45 #define USB_PID_DATA2                   0x87    /* USB 2.0 */
  46 #define USB_PID_SPLIT                   0x78    /* USB 2.0 */
  47 #define USB_PID_IN                      0x69
  48 #define USB_PID_NAK                     0x5a
  49 #define USB_PID_DATA1                   0x4b
  50 #define USB_PID_PREAMBLE                0x3c    /* Token mode */
  51 #define USB_PID_ERR                     0x3c    /* USB 2.0: handshake mode */
  52 #define USB_PID_SETUP                   0x2d
  53 #define USB_PID_STALL                   0x1e
  54 #define USB_PID_MDATA                   0x0f    /* USB 2.0 */
  55 
  56 /*-------------------------------------------------------------------------*/
  57 
  58 /*
  59  * USB Host Controller Driver (usb_hcd) framework
  60  *
  61  * Since "struct usb_bus" is so thin, you can't share much code in it.
  62  * This framework is a layer over that, and should be more sharable.
  63  */
  64 
  65 /*-------------------------------------------------------------------------*/
  66 
  67 struct giveback_urb_bh {
  68         bool running;
  69         spinlock_t lock;
  70         struct list_head  head;
  71         struct tasklet_struct bh;
  72         struct usb_host_endpoint *completing_ep;
  73 };
  74 
  75 enum usb_dev_authorize_policy {
  76         USB_DEVICE_AUTHORIZE_NONE       = 0,
  77         USB_DEVICE_AUTHORIZE_ALL        = 1,
  78         USB_DEVICE_AUTHORIZE_INTERNAL   = 2,
  79 };
  80 
  81 struct usb_hcd {
  82 
  83         /*
  84          * housekeeping
  85          */
  86         struct usb_bus          self;           /* hcd is-a bus */
  87         struct kref             kref;           /* reference counter */
  88 
  89         const char              *product_desc;  /* product/vendor string */
  90         int                     speed;          /* Speed for this roothub.
  91                                                  * May be different from
  92                                                  * hcd->driver->flags & HCD_MASK
  93                                                  */
  94         char                    irq_descr[24];  /* driver + bus # */
  95 
  96         struct timer_list       rh_timer;       /* drives root-hub polling */
  97         struct urb              *status_urb;    /* the current status urb */
  98 #ifdef CONFIG_PM
  99         struct work_struct      wakeup_work;    /* for remote wakeup */
 100 #endif
 101         struct work_struct      died_work;      /* for when the device dies */
 102 
 103         /*
 104          * hardware info/state
 105          */
 106         const struct hc_driver  *driver;        /* hw-specific hooks */
 107 
 108         /*
 109          * OTG and some Host controllers need software interaction with phys;
 110          * other external phys should be software-transparent
 111          */
 112         struct usb_phy          *usb_phy;
 113         struct usb_phy_roothub  *phy_roothub;
 114 
 115         /* Flags that need to be manipulated atomically because they can
 116          * change while the host controller is running.  Always use
 117          * set_bit() or clear_bit() to change their values.
 118          */
 119         unsigned long           flags;
 120 #define HCD_FLAG_HW_ACCESSIBLE          0       /* at full power */
 121 #define HCD_FLAG_POLL_RH                2       /* poll for rh status? */
 122 #define HCD_FLAG_POLL_PENDING           3       /* status has changed? */
 123 #define HCD_FLAG_WAKEUP_PENDING         4       /* root hub is resuming? */
 124 #define HCD_FLAG_RH_RUNNING             5       /* root hub is running? */
 125 #define HCD_FLAG_DEAD                   6       /* controller has died? */
 126 #define HCD_FLAG_INTF_AUTHORIZED        7       /* authorize interfaces? */
 127 
 128         /* The flags can be tested using these macros; they are likely to
 129          * be slightly faster than test_bit().
 130          */
 131 #define HCD_HW_ACCESSIBLE(hcd)  ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE))
 132 #define HCD_POLL_RH(hcd)        ((hcd)->flags & (1U << HCD_FLAG_POLL_RH))
 133 #define HCD_POLL_PENDING(hcd)   ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING))
 134 #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING))
 135 #define HCD_RH_RUNNING(hcd)     ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING))
 136 #define HCD_DEAD(hcd)           ((hcd)->flags & (1U << HCD_FLAG_DEAD))
 137 
 138         /*
 139          * Specifies if interfaces are authorized by default
 140          * or they require explicit user space authorization; this bit is
 141          * settable through /sys/class/usb_host/X/interface_authorized_default
 142          */
 143 #define HCD_INTF_AUTHORIZED(hcd) \
 144         ((hcd)->flags & (1U << HCD_FLAG_INTF_AUTHORIZED))
 145 
 146         /*
 147          * Specifies if devices are authorized by default
 148          * or they require explicit user space authorization; this bit is
 149          * settable through /sys/class/usb_host/X/authorized_default
 150          */
 151         enum usb_dev_authorize_policy dev_policy;
 152 
 153         /* Flags that get set only during HCD registration or removal. */
 154         unsigned                rh_registered:1;/* is root hub registered? */
 155         unsigned                rh_pollable:1;  /* may we poll the root hub? */
 156         unsigned                msix_enabled:1; /* driver has MSI-X enabled? */
 157         unsigned                msi_enabled:1;  /* driver has MSI enabled? */
 158         /*
 159          * do not manage the PHY state in the HCD core, instead let the driver
 160          * handle this (for example if the PHY can only be turned on after a
 161          * specific event)
 162          */
 163         unsigned                skip_phy_initialization:1;
 164 
 165         /* The next flag is a stopgap, to be removed when all the HCDs
 166          * support the new root-hub polling mechanism. */
 167         unsigned                uses_new_polling:1;
 168         unsigned                wireless:1;     /* Wireless USB HCD */
 169         unsigned                has_tt:1;       /* Integrated TT in root hub */
 170         unsigned                amd_resume_bug:1; /* AMD remote wakeup quirk */
 171         unsigned                can_do_streams:1; /* HC supports streams */
 172         unsigned                tpl_support:1; /* OTG & EH TPL support */
 173         unsigned                cant_recv_wakeups:1;
 174                         /* wakeup requests from downstream aren't received */
 175 
 176         unsigned int            irq;            /* irq allocated */
 177         void __iomem            *regs;          /* device memory/io */
 178         resource_size_t         rsrc_start;     /* memory/io resource start */
 179         resource_size_t         rsrc_len;       /* memory/io resource length */
 180         unsigned                power_budget;   /* in mA, 0 = no limit */
 181 
 182         struct giveback_urb_bh  high_prio_bh;
 183         struct giveback_urb_bh  low_prio_bh;
 184 
 185         /* bandwidth_mutex should be taken before adding or removing
 186          * any new bus bandwidth constraints:
 187          *   1. Before adding a configuration for a new device.
 188          *   2. Before removing the configuration to put the device into
 189          *      the addressed state.
 190          *   3. Before selecting a different configuration.
 191          *   4. Before selecting an alternate interface setting.
 192          *
 193          * bandwidth_mutex should be dropped after a successful control message
 194          * to the device, or resetting the bandwidth after a failed attempt.
 195          */
 196         struct mutex            *address0_mutex;
 197         struct mutex            *bandwidth_mutex;
 198         struct usb_hcd          *shared_hcd;
 199         struct usb_hcd          *primary_hcd;
 200 
 201 
 202 #define HCD_BUFFER_POOLS        4
 203         struct dma_pool         *pool[HCD_BUFFER_POOLS];
 204 
 205         int                     state;
 206 #       define  __ACTIVE                0x01
 207 #       define  __SUSPEND               0x04
 208 #       define  __TRANSIENT             0x80
 209 
 210 #       define  HC_STATE_HALT           0
 211 #       define  HC_STATE_RUNNING        (__ACTIVE)
 212 #       define  HC_STATE_QUIESCING      (__SUSPEND|__TRANSIENT|__ACTIVE)
 213 #       define  HC_STATE_RESUMING       (__SUSPEND|__TRANSIENT)
 214 #       define  HC_STATE_SUSPENDED      (__SUSPEND)
 215 
 216 #define HC_IS_RUNNING(state) ((state) & __ACTIVE)
 217 #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
 218 
 219         /* memory pool for HCs having local memory, or %NULL */
 220         struct gen_pool         *localmem_pool;
 221 
 222         /* more shared queuing code would be good; it should support
 223          * smarter scheduling, handle transaction translators, etc;
 224          * input size of periodic table to an interrupt scheduler.
 225          * (ohci 32, uhci 1024, ehci 256/512/1024).
 226          */
 227 
 228         /* The HC driver's private data is stored at the end of
 229          * this structure.
 230          */
 231         unsigned long hcd_priv[0]
 232                         __attribute__ ((aligned(sizeof(s64))));
 233 };
 234 
 235 /* 2.4 does this a bit differently ... */
 236 static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
 237 {
 238         return &hcd->self;
 239 }
 240 
 241 static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
 242 {
 243         return container_of(bus, struct usb_hcd, self);
 244 }
 245 
 246 /*-------------------------------------------------------------------------*/
 247 
 248 
 249 struct hc_driver {
 250         const char      *description;   /* "ehci-hcd" etc */
 251         const char      *product_desc;  /* product/vendor string */
 252         size_t          hcd_priv_size;  /* size of private data */
 253 
 254         /* irq handler */
 255         irqreturn_t     (*irq) (struct usb_hcd *hcd);
 256 
 257         int     flags;
 258 #define HCD_MEMORY      0x0001          /* HC regs use memory (else I/O) */
 259 #define HCD_DMA         0x0002          /* HC uses DMA */
 260 #define HCD_SHARED      0x0004          /* Two (or more) usb_hcds share HW */
 261 #define HCD_USB11       0x0010          /* USB 1.1 */
 262 #define HCD_USB2        0x0020          /* USB 2.0 */
 263 #define HCD_USB25       0x0030          /* Wireless USB 1.0 (USB 2.5)*/
 264 #define HCD_USB3        0x0040          /* USB 3.0 */
 265 #define HCD_USB31       0x0050          /* USB 3.1 */
 266 #define HCD_USB32       0x0060          /* USB 3.2 */
 267 #define HCD_MASK        0x0070
 268 #define HCD_BH          0x0100          /* URB complete in BH context */
 269 
 270         /* called to init HCD and root hub */
 271         int     (*reset) (struct usb_hcd *hcd);
 272         int     (*start) (struct usb_hcd *hcd);
 273 
 274         /* NOTE:  these suspend/resume calls relate to the HC as
 275          * a whole, not just the root hub; they're for PCI bus glue.
 276          */
 277         /* called after suspending the hub, before entering D3 etc */
 278         int     (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup);
 279 
 280         /* called after entering D0 (etc), before resuming the hub */
 281         int     (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
 282 
 283         /* cleanly make HCD stop writing memory and doing I/O */
 284         void    (*stop) (struct usb_hcd *hcd);
 285 
 286         /* shutdown HCD */
 287         void    (*shutdown) (struct usb_hcd *hcd);
 288 
 289         /* return current frame number */
 290         int     (*get_frame_number) (struct usb_hcd *hcd);
 291 
 292         /* manage i/o requests, device state */
 293         int     (*urb_enqueue)(struct usb_hcd *hcd,
 294                                 struct urb *urb, gfp_t mem_flags);
 295         int     (*urb_dequeue)(struct usb_hcd *hcd,
 296                                 struct urb *urb, int status);
 297 
 298         /*
 299          * (optional) these hooks allow an HCD to override the default DMA
 300          * mapping and unmapping routines.  In general, they shouldn't be
 301          * necessary unless the host controller has special DMA requirements,
 302          * such as alignment contraints.  If these are not specified, the
 303          * general usb_hcd_(un)?map_urb_for_dma functions will be used instead
 304          * (and it may be a good idea to call these functions in your HCD
 305          * implementation)
 306          */
 307         int     (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb,
 308                                    gfp_t mem_flags);
 309         void    (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb);
 310 
 311         /* hw synch, freeing endpoint resources that urb_dequeue can't */
 312         void    (*endpoint_disable)(struct usb_hcd *hcd,
 313                         struct usb_host_endpoint *ep);
 314 
 315         /* (optional) reset any endpoint state such as sequence number
 316            and current window */
 317         void    (*endpoint_reset)(struct usb_hcd *hcd,
 318                         struct usb_host_endpoint *ep);
 319 
 320         /* root hub support */
 321         int     (*hub_status_data) (struct usb_hcd *hcd, char *buf);
 322         int     (*hub_control) (struct usb_hcd *hcd,
 323                                 u16 typeReq, u16 wValue, u16 wIndex,
 324                                 char *buf, u16 wLength);
 325         int     (*bus_suspend)(struct usb_hcd *);
 326         int     (*bus_resume)(struct usb_hcd *);
 327         int     (*start_port_reset)(struct usb_hcd *, unsigned port_num);
 328         unsigned long   (*get_resuming_ports)(struct usb_hcd *);
 329 
 330                 /* force handover of high-speed port to full-speed companion */
 331         void    (*relinquish_port)(struct usb_hcd *, int);
 332                 /* has a port been handed over to a companion? */
 333         int     (*port_handed_over)(struct usb_hcd *, int);
 334 
 335                 /* CLEAR_TT_BUFFER completion callback */
 336         void    (*clear_tt_buffer_complete)(struct usb_hcd *,
 337                                 struct usb_host_endpoint *);
 338 
 339         /* xHCI specific functions */
 340                 /* Called by usb_alloc_dev to alloc HC device structures */
 341         int     (*alloc_dev)(struct usb_hcd *, struct usb_device *);
 342                 /* Called by usb_disconnect to free HC device structures */
 343         void    (*free_dev)(struct usb_hcd *, struct usb_device *);
 344         /* Change a group of bulk endpoints to support multiple stream IDs */
 345         int     (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
 346                 struct usb_host_endpoint **eps, unsigned int num_eps,
 347                 unsigned int num_streams, gfp_t mem_flags);
 348         /* Reverts a group of bulk endpoints back to not using stream IDs.
 349          * Can fail if we run out of memory.
 350          */
 351         int     (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
 352                 struct usb_host_endpoint **eps, unsigned int num_eps,
 353                 gfp_t mem_flags);
 354 
 355         /* Bandwidth computation functions */
 356         /* Note that add_endpoint() can only be called once per endpoint before
 357          * check_bandwidth() or reset_bandwidth() must be called.
 358          * drop_endpoint() can only be called once per endpoint also.
 359          * A call to xhci_drop_endpoint() followed by a call to
 360          * xhci_add_endpoint() will add the endpoint to the schedule with
 361          * possibly new parameters denoted by a different endpoint descriptor
 362          * in usb_host_endpoint.  A call to xhci_add_endpoint() followed by a
 363          * call to xhci_drop_endpoint() is not allowed.
 364          */
 365                 /* Allocate endpoint resources and add them to a new schedule */
 366         int     (*add_endpoint)(struct usb_hcd *, struct usb_device *,
 367                                 struct usb_host_endpoint *);
 368                 /* Drop an endpoint from a new schedule */
 369         int     (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
 370                                  struct usb_host_endpoint *);
 371                 /* Check that a new hardware configuration, set using
 372                  * endpoint_enable and endpoint_disable, does not exceed bus
 373                  * bandwidth.  This must be called before any set configuration
 374                  * or set interface requests are sent to the device.
 375                  */
 376         int     (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
 377                 /* Reset the device schedule to the last known good schedule,
 378                  * which was set from a previous successful call to
 379                  * check_bandwidth().  This reverts any add_endpoint() and
 380                  * drop_endpoint() calls since that last successful call.
 381                  * Used for when a check_bandwidth() call fails due to resource
 382                  * or bandwidth constraints.
 383                  */
 384         void    (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
 385                 /* Returns the hardware-chosen device address */
 386         int     (*address_device)(struct usb_hcd *, struct usb_device *udev);
 387                 /* prepares the hardware to send commands to the device */
 388         int     (*enable_device)(struct usb_hcd *, struct usb_device *udev);
 389                 /* Notifies the HCD after a hub descriptor is fetched.
 390                  * Will block.
 391                  */
 392         int     (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
 393                         struct usb_tt *tt, gfp_t mem_flags);
 394         int     (*reset_device)(struct usb_hcd *, struct usb_device *);
 395                 /* Notifies the HCD after a device is connected and its
 396                  * address is set
 397                  */
 398         int     (*update_device)(struct usb_hcd *, struct usb_device *);
 399         int     (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int);
 400         /* USB 3.0 Link Power Management */
 401                 /* Returns the USB3 hub-encoded value for the U1/U2 timeout. */
 402         int     (*enable_usb3_lpm_timeout)(struct usb_hcd *,
 403                         struct usb_device *, enum usb3_link_state state);
 404                 /* The xHCI host controller can still fail the command to
 405                  * disable the LPM timeouts, so this can return an error code.
 406                  */
 407         int     (*disable_usb3_lpm_timeout)(struct usb_hcd *,
 408                         struct usb_device *, enum usb3_link_state state);
 409         int     (*find_raw_port_number)(struct usb_hcd *, int);
 410         /* Call for power on/off the port if necessary */
 411         int     (*port_power)(struct usb_hcd *hcd, int portnum, bool enable);
 412 
 413 };
 414 
 415 static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd)
 416 {
 417         return hcd->driver->flags & HCD_BH;
 418 }
 419 
 420 static inline bool hcd_periodic_completion_in_progress(struct usb_hcd *hcd,
 421                 struct usb_host_endpoint *ep)
 422 {
 423         return hcd->high_prio_bh.completing_ep == ep;
 424 }
 425 
 426 static inline bool hcd_uses_dma(struct usb_hcd *hcd)
 427 {
 428         return IS_ENABLED(CONFIG_HAS_DMA) && (hcd->driver->flags & HCD_DMA);
 429 }
 430 
 431 extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
 432 extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
 433                 int status);
 434 extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
 435 
 436 extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
 437 extern int usb_hcd_unlink_urb(struct urb *urb, int status);
 438 extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
 439                 int status);
 440 extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
 441                 gfp_t mem_flags);
 442 extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
 443 extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *);
 444 extern void usb_hcd_flush_endpoint(struct usb_device *udev,
 445                 struct usb_host_endpoint *ep);
 446 extern void usb_hcd_disable_endpoint(struct usb_device *udev,
 447                 struct usb_host_endpoint *ep);
 448 extern void usb_hcd_reset_endpoint(struct usb_device *udev,
 449                 struct usb_host_endpoint *ep);
 450 extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
 451 extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
 452                 struct usb_host_config *new_config,
 453                 struct usb_host_interface *old_alt,
 454                 struct usb_host_interface *new_alt);
 455 extern int usb_hcd_get_frame_number(struct usb_device *udev);
 456 
 457 struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver,
 458                 struct device *sysdev, struct device *dev, const char *bus_name,
 459                 struct usb_hcd *primary_hcd);
 460 extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
 461                 struct device *dev, const char *bus_name);
 462 extern struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
 463                 struct device *dev, const char *bus_name,
 464                 struct usb_hcd *shared_hcd);
 465 extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
 466 extern void usb_put_hcd(struct usb_hcd *hcd);
 467 extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd);
 468 extern int usb_add_hcd(struct usb_hcd *hcd,
 469                 unsigned int irqnum, unsigned long irqflags);
 470 extern void usb_remove_hcd(struct usb_hcd *hcd);
 471 extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1);
 472 int usb_hcd_setup_local_mem(struct usb_hcd *hcd, phys_addr_t phys_addr,
 473                             dma_addr_t dma, size_t size);
 474 
 475 struct platform_device;
 476 extern void usb_hcd_platform_shutdown(struct platform_device *dev);
 477 
 478 #ifdef CONFIG_USB_PCI
 479 struct pci_dev;
 480 struct pci_device_id;
 481 extern int usb_hcd_pci_probe(struct pci_dev *dev,
 482                                 const struct pci_device_id *id);
 483 extern void usb_hcd_pci_remove(struct pci_dev *dev);
 484 extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
 485 
 486 extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev);
 487 
 488 #ifdef CONFIG_PM
 489 extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
 490 #endif
 491 #endif /* CONFIG_USB_PCI */
 492 
 493 /* pci-ish (pdev null is ok) buffer alloc/mapping support */
 494 void usb_init_pool_max(void);
 495 int hcd_buffer_create(struct usb_hcd *hcd);
 496 void hcd_buffer_destroy(struct usb_hcd *hcd);
 497 
 498 void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
 499         gfp_t mem_flags, dma_addr_t *dma);
 500 void hcd_buffer_free(struct usb_bus *bus, size_t size,
 501         void *addr, dma_addr_t dma);
 502 
 503 /* generic bus glue, needed for host controllers that don't use PCI */
 504 extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
 505 
 506 extern void usb_hc_died(struct usb_hcd *hcd);
 507 extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
 508 extern void usb_wakeup_notification(struct usb_device *hdev,
 509                 unsigned int portnum);
 510 
 511 extern void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum);
 512 extern void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum);
 513 
 514 /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
 515 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
 516 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << (ep)))
 517 #define usb_settoggle(dev, ep, out, bit) \
 518                 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
 519                  ((bit) << (ep)))
 520 
 521 /* -------------------------------------------------------------------------- */
 522 
 523 /* Enumeration is only for the hub driver, or HCD virtual root hubs */
 524 extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
 525                                         struct usb_bus *, unsigned port);
 526 extern int usb_new_device(struct usb_device *dev);
 527 extern void usb_disconnect(struct usb_device **);
 528 
 529 extern int usb_get_configuration(struct usb_device *dev);
 530 extern void usb_destroy_configuration(struct usb_device *dev);
 531 
 532 /*-------------------------------------------------------------------------*/
 533 
 534 /*
 535  * HCD Root Hub support
 536  */
 537 
 538 #include <linux/usb/ch11.h>
 539 
 540 /*
 541  * As of USB 2.0, full/low speed devices are segregated into trees.
 542  * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
 543  * The other type grows from high speed hubs when they connect to
 544  * full/low speed devices using "Transaction Translators" (TTs).
 545  *
 546  * TTs should only be known to the hub driver, and high speed bus
 547  * drivers (only EHCI for now).  They affect periodic scheduling and
 548  * sometimes control/bulk error recovery.
 549  */
 550 
 551 struct usb_device;
 552 
 553 struct usb_tt {
 554         struct usb_device       *hub;   /* upstream highspeed hub */
 555         int                     multi;  /* true means one TT per port */
 556         unsigned                think_time;     /* think time in ns */
 557         void                    *hcpriv;        /* HCD private data */
 558 
 559         /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
 560         spinlock_t              lock;
 561         struct list_head        clear_list;     /* of usb_tt_clear */
 562         struct work_struct      clear_work;
 563 };
 564 
 565 struct usb_tt_clear {
 566         struct list_head        clear_list;
 567         unsigned                tt;
 568         u16                     devinfo;
 569         struct usb_hcd          *hcd;
 570         struct usb_host_endpoint        *ep;
 571 };
 572 
 573 extern int usb_hub_clear_tt_buffer(struct urb *urb);
 574 extern void usb_ep0_reinit(struct usb_device *);
 575 
 576 /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
 577 #define DeviceRequest \
 578         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
 579 #define DeviceOutRequest \
 580         ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
 581 
 582 #define InterfaceRequest \
 583         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
 584 
 585 #define EndpointRequest \
 586         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT)<<8)
 587 #define EndpointOutRequest \
 588         ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT)<<8)
 589 
 590 /* class requests from the USB 2.0 hub spec, table 11-15 */
 591 #define HUB_CLASS_REQ(dir, type, request) ((((dir) | (type)) << 8) | (request))
 592 /* GetBusState and SetHubDescriptor are optional, omitted */
 593 #define ClearHubFeature         HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_CLEAR_FEATURE)
 594 #define ClearPortFeature        HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_CLEAR_FEATURE)
 595 #define GetHubDescriptor        HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_DESCRIPTOR)
 596 #define GetHubStatus            HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_STATUS)
 597 #define GetPortStatus           HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, USB_REQ_GET_STATUS)
 598 #define SetHubFeature           HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_SET_FEATURE)
 599 #define SetPortFeature          HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_SET_FEATURE)
 600 #define ClearTTBuffer           HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, HUB_CLEAR_TT_BUFFER)
 601 #define ResetTT                 HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, HUB_RESET_TT)
 602 #define GetTTState              HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, HUB_GET_TT_STATE)
 603 #define StopTT                  HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, HUB_STOP_TT)
 604 
 605 
 606 /*-------------------------------------------------------------------------*/
 607 
 608 /* class requests from USB 3.1 hub spec, table 10-7 */
 609 #define SetHubDepth             HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, HUB_SET_DEPTH)
 610 #define GetPortErrorCount       HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, HUB_GET_PORT_ERR_COUNT)
 611 
 612 /*
 613  * Generic bandwidth allocation constants/support
 614  */
 615 #define FRAME_TIME_USECS        1000L
 616 #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
 617                 /* Trying not to use worst-case bit-stuffing
 618                  * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
 619                 /* bytecount = data payload byte count */
 620 
 621 #define NS_TO_US(ns)    DIV_ROUND_UP(ns, 1000L)
 622                         /* convert nanoseconds to microseconds, rounding up */
 623 
 624 /*
 625  * Full/low speed bandwidth allocation constants/support.
 626  */
 627 #define BW_HOST_DELAY   1000L           /* nanoseconds */
 628 #define BW_HUB_LS_SETUP 333L            /* nanoseconds */
 629                         /* 4 full-speed bit times (est.) */
 630 
 631 #define FRAME_TIME_BITS                 12000L  /* frame = 1 millisecond */
 632 #define FRAME_TIME_MAX_BITS_ALLOC       (90L * FRAME_TIME_BITS / 100L)
 633 #define FRAME_TIME_MAX_USECS_ALLOC      (90L * FRAME_TIME_USECS / 100L)
 634 
 635 /*
 636  * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
 637  * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
 638  * to preallocate bandwidth)
 639  */
 640 #define USB2_HOST_DELAY 5       /* nsec, guess */
 641 #define HS_NSECS(bytes) (((55 * 8 * 2083) \
 642         + (2083UL * (3 + BitTime(bytes))))/1000 \
 643         + USB2_HOST_DELAY)
 644 #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
 645         + (2083UL * (3 + BitTime(bytes))))/1000 \
 646         + USB2_HOST_DELAY)
 647 #define HS_USECS(bytes)         NS_TO_US(HS_NSECS(bytes))
 648 #define HS_USECS_ISO(bytes)     NS_TO_US(HS_NSECS_ISO(bytes))
 649 
 650 extern long usb_calc_bus_time(int speed, int is_input,
 651                         int isoc, int bytecount);
 652 
 653 /*-------------------------------------------------------------------------*/
 654 
 655 extern void usb_set_device_state(struct usb_device *udev,
 656                 enum usb_device_state new_state);
 657 
 658 /*-------------------------------------------------------------------------*/
 659 
 660 /* exported only within usbcore */
 661 
 662 extern struct idr usb_bus_idr;
 663 extern struct mutex usb_bus_idr_lock;
 664 extern wait_queue_head_t usb_kill_urb_queue;
 665 
 666 
 667 #define usb_endpoint_out(ep_dir)        (!((ep_dir) & USB_DIR_IN))
 668 
 669 #ifdef CONFIG_PM
 670 extern unsigned usb_wakeup_enabled_descendants(struct usb_device *udev);
 671 extern void usb_root_hub_lost_power(struct usb_device *rhdev);
 672 extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
 673 extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
 674 extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
 675 #else
 676 static inline unsigned usb_wakeup_enabled_descendants(struct usb_device *udev)
 677 {
 678         return 0;
 679 }
 680 static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
 681 {
 682         return;
 683 }
 684 #endif /* CONFIG_PM */
 685 
 686 /*-------------------------------------------------------------------------*/
 687 
 688 #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
 689 
 690 struct usb_mon_operations {
 691         void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
 692         void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
 693         void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
 694         /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
 695 };
 696 
 697 extern const struct usb_mon_operations *mon_ops;
 698 
 699 static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
 700 {
 701         if (bus->monitored)
 702                 (*mon_ops->urb_submit)(bus, urb);
 703 }
 704 
 705 static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
 706     int error)
 707 {
 708         if (bus->monitored)
 709                 (*mon_ops->urb_submit_error)(bus, urb, error);
 710 }
 711 
 712 static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
 713                 int status)
 714 {
 715         if (bus->monitored)
 716                 (*mon_ops->urb_complete)(bus, urb, status);
 717 }
 718 
 719 int usb_mon_register(const struct usb_mon_operations *ops);
 720 void usb_mon_deregister(void);
 721 
 722 #else
 723 
 724 static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
 725 static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
 726     int error) {}
 727 static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
 728                 int status) {}
 729 
 730 #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
 731 
 732 /*-------------------------------------------------------------------------*/
 733 
 734 /* random stuff */
 735 
 736 #define RUN_CONTEXT (in_irq() ? "in_irq" \
 737                 : (in_interrupt() ? "in_interrupt" : "can sleep"))
 738 
 739 
 740 /* This rwsem is for use only by the hub driver and ehci-hcd.
 741  * Nobody else should touch it.
 742  */
 743 extern struct rw_semaphore ehci_cf_port_reset_rwsem;
 744 
 745 /* Keep track of which host controller drivers are loaded */
 746 #define USB_UHCI_LOADED         0
 747 #define USB_OHCI_LOADED         1
 748 #define USB_EHCI_LOADED         2
 749 extern unsigned long usb_hcds_loaded;
 750 
 751 #endif /* __KERNEL__ */
 752 
 753 #endif /* __USB_CORE_HCD_H */