FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/controller/ehci.h

     /* $FreeBSD$ */
     /*-
      * SPDX-License-Identifier: BSD-2-Clause-NetBSD
      *
      * Copyright (c) 2001 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Lennart Augustsson (lennart@augustsson.net).
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #ifndef _EHCI_H_
    #define _EHCI_H_
    
    #define EHCI_MAX_DEVICES MIN(USB_MAX_DEVICES, 128)
    
    /*
     * Alignment NOTE: structures must be aligned so that the hardware can index
     * without performing addition.
     */
    #define EHCI_FRAMELIST_ALIGN          0x1000    /* bytes */
    #define EHCI_FRAMELIST_COUNT            1024    /* units */
    #define EHCI_VIRTUAL_FRAMELIST_COUNT     128    /* units */
    
    #if ((8*EHCI_VIRTUAL_FRAMELIST_COUNT) < USB_MAX_HS_ISOC_FRAMES_PER_XFER)
    #error "maximum number of high-speed isochronous frames is higher than supported!"
    #endif
    
    #if (EHCI_VIRTUAL_FRAMELIST_COUNT < USB_MAX_FS_ISOC_FRAMES_PER_XFER)
    #error "maximum number of full-speed isochronous frames is higher than supported!"
    #endif
    
    /* Link types */
    #define EHCI_LINK_TERMINATE     0x00000001
    #define EHCI_LINK_TYPE(x)       ((x) & 0x00000006)
    #define EHCI_LINK_ITD           0x0
    #define EHCI_LINK_QH            0x2
    #define EHCI_LINK_SITD          0x4
    #define EHCI_LINK_FSTN          0x6
    #define EHCI_LINK_ADDR(x)       ((x) &~ 0x1f)
    
    /* Structures alignment (bytes) */
    #define EHCI_ITD_ALIGN  128
    #define EHCI_SITD_ALIGN 64
    #define EHCI_QTD_ALIGN  64
    #define EHCI_QH_ALIGN   128
    #define EHCI_FSTN_ALIGN 32
    /* Data buffers are divided into one or more pages */
    #define EHCI_PAGE_SIZE  0x1000
    #if     ((USB_PAGE_SIZE < EHCI_PAGE_SIZE) || (EHCI_PAGE_SIZE == 0) ||   \
            (USB_PAGE_SIZE < EHCI_ITD_ALIGN) || (EHCI_ITD_ALIGN == 0) ||    \
            (USB_PAGE_SIZE < EHCI_SITD_ALIGN) || (EHCI_SITD_ALIGN == 0) ||  \
            (USB_PAGE_SIZE < EHCI_QTD_ALIGN) || (EHCI_QTD_ALIGN == 0) ||    \
            (USB_PAGE_SIZE < EHCI_QH_ALIGN) || (EHCI_QH_ALIGN == 0) ||      \
            (USB_PAGE_SIZE < EHCI_FSTN_ALIGN) || (EHCI_FSTN_ALIGN == 0))
    #error  "Invalid USB page size!"
    #endif
    
    /*
     * Isochronous Transfer Descriptor.  This descriptor is used for high speed
     * transfers only.
     */
    struct ehci_itd {
            volatile uint32_t itd_next;
            volatile uint32_t itd_status[8];
    #define EHCI_ITD_SET_LEN(x)     ((x) << 16)
    #define EHCI_ITD_GET_LEN(x)     (((x) >> 16) & 0xFFF)
    #define EHCI_ITD_IOC            (1 << 15)
    #define EHCI_ITD_SET_PG(x)      ((x) << 12)
    #define EHCI_ITD_GET_PG(x)      (((x) >> 12) & 0x7)
    #define EHCI_ITD_SET_OFFS(x)    (x)
    #define EHCI_ITD_GET_OFFS(x)    (((x) >> 0) & 0xFFF)
    #define EHCI_ITD_ACTIVE         (1U << 31)
    #define EHCI_ITD_DATABUFERR     (1 << 30)
    #define EHCI_ITD_BABBLE         (1 << 29)
    #define EHCI_ITD_XACTERR        (1 << 28)
            volatile uint32_t itd_bp[7];
            /* itd_bp[0] */
   #define EHCI_ITD_SET_ADDR(x)    (x)
   #define EHCI_ITD_GET_ADDR(x)    (((x) >> 0) & 0x7F)
   #define EHCI_ITD_SET_ENDPT(x)   ((x) << 8)
   #define EHCI_ITD_GET_ENDPT(x)   (((x) >> 8) & 0xF)
           /* itd_bp[1] */
   #define EHCI_ITD_SET_DIR_IN     (1 << 11)
   #define EHCI_ITD_SET_DIR_OUT    (0 << 11)
   #define EHCI_ITD_SET_MPL(x)     (x)
   #define EHCI_ITD_GET_MPL(x)     (((x) >> 0) & 0x7FF)
           volatile uint32_t itd_bp_hi[7];
   /*
    * Extra information needed:
    */
           uint32_t itd_self;
           struct ehci_itd *next;
           struct ehci_itd *prev;
           struct ehci_itd *obj_next;
           struct usb_page_cache *page_cache;
   } __aligned(EHCI_ITD_ALIGN);
   
   typedef struct ehci_itd ehci_itd_t;
   
   /*
    * Split Transaction Isochronous Transfer Descriptor.  This descriptor is used
    * for full speed transfers only.
    */
   struct ehci_sitd {
           volatile uint32_t sitd_next;
           volatile uint32_t sitd_portaddr;
   #define EHCI_SITD_SET_DIR_OUT   (0 << 31)
   #define EHCI_SITD_SET_DIR_IN    (1U << 31)
   #define EHCI_SITD_SET_ADDR(x)   (x)
   #define EHCI_SITD_GET_ADDR(x)   ((x) & 0x7F)
   #define EHCI_SITD_SET_ENDPT(x)  ((x) << 8)
   #define EHCI_SITD_GET_ENDPT(x)  (((x) >> 8) & 0xF)
   #define EHCI_SITD_GET_DIR(x)    ((x) >> 31)
   #define EHCI_SITD_SET_PORT(x)   ((x) << 24)
   #define EHCI_SITD_GET_PORT(x)   (((x) >> 24) & 0x7F)
   #define EHCI_SITD_SET_HUBA(x)   ((x) << 16)
   #define EHCI_SITD_GET_HUBA(x)   (((x) >> 16) & 0x7F)
           volatile uint32_t sitd_mask;
   #define EHCI_SITD_SET_SMASK(x)  (x)
   #define EHCI_SITD_SET_CMASK(x)  ((x) << 8)
           volatile uint32_t sitd_status;
   #define EHCI_SITD_COMPLETE_SPLIT        (1<<1)
   #define EHCI_SITD_START_SPLIT           (0<<1)
   #define EHCI_SITD_MISSED_MICRO_FRAME    (1<<2)
   #define EHCI_SITD_XACTERR               (1<<3)
   #define EHCI_SITD_BABBLE                (1<<4)
   #define EHCI_SITD_DATABUFERR            (1<<5)
   #define EHCI_SITD_ERROR                 (1<<6)
   #define EHCI_SITD_ACTIVE                (1<<7)
   #define EHCI_SITD_IOC                   (1<<31)
   #define EHCI_SITD_SET_LEN(len)          ((len)<<16)
   #define EHCI_SITD_GET_LEN(x)            (((x)>>16) & 0x3FF)
           volatile uint32_t sitd_bp[2];
           volatile uint32_t sitd_back;
           volatile uint32_t sitd_bp_hi[2];
   /*
    * Extra information needed:
    */
           uint32_t sitd_self;
           struct ehci_sitd *next;
           struct ehci_sitd *prev;
           struct ehci_sitd *obj_next;
           struct usb_page_cache *page_cache;
   } __aligned(EHCI_SITD_ALIGN);
   
   typedef struct ehci_sitd ehci_sitd_t;
   
   /* Queue Element Transfer Descriptor */
   struct ehci_qtd {
           volatile uint32_t qtd_next;
           volatile uint32_t qtd_altnext;
           volatile uint32_t qtd_status;
   #define EHCI_QTD_GET_STATUS(x)  (((x) >>  0) & 0xff)
   #define EHCI_QTD_SET_STATUS(x)  ((x) << 0)
   #define EHCI_QTD_ACTIVE         0x80
   #define EHCI_QTD_HALTED         0x40
   #define EHCI_QTD_BUFERR         0x20
   #define EHCI_QTD_BABBLE         0x10
   #define EHCI_QTD_XACTERR        0x08
   #define EHCI_QTD_MISSEDMICRO    0x04
   #define EHCI_QTD_SPLITXSTATE    0x02
   #define EHCI_QTD_PINGSTATE      0x01
   #define EHCI_QTD_STATERRS       0x74
   #define EHCI_QTD_GET_PID(x)     (((x) >>  8) & 0x3)
   #define EHCI_QTD_SET_PID(x)     ((x) <<  8)
   #define EHCI_QTD_PID_OUT        0x0
   #define EHCI_QTD_PID_IN         0x1
   #define EHCI_QTD_PID_SETUP      0x2
   #define EHCI_QTD_GET_CERR(x)    (((x) >> 10) &  0x3)
   #define EHCI_QTD_SET_CERR(x)    ((x) << 10)
   #define EHCI_QTD_GET_C_PAGE(x)  (((x) >> 12) &  0x7)
   #define EHCI_QTD_SET_C_PAGE(x)  ((x) << 12)
   #define EHCI_QTD_GET_IOC(x)     (((x) >> 15) &  0x1)
   #define EHCI_QTD_IOC            0x00008000
   #define EHCI_QTD_GET_BYTES(x)   (((x) >> 16) &  0x7fff)
   #define EHCI_QTD_SET_BYTES(x)   ((x) << 16)
   #define EHCI_QTD_GET_TOGGLE(x)  (((x) >> 31) &  0x1)
   #define EHCI_QTD_SET_TOGGLE(x)  ((x) << 31)
   #define EHCI_QTD_TOGGLE_MASK    0x80000000
   #define EHCI_QTD_NBUFFERS       5
   #define EHCI_QTD_PAYLOAD_MAX ((EHCI_QTD_NBUFFERS-1)*EHCI_PAGE_SIZE)
           volatile uint32_t qtd_buffer[EHCI_QTD_NBUFFERS];
           volatile uint32_t qtd_buffer_hi[EHCI_QTD_NBUFFERS];
   /*
    * Extra information needed:
    */
           struct ehci_qtd *alt_next;
           struct ehci_qtd *obj_next;
           struct usb_page_cache *page_cache;
           uint32_t qtd_self;
           uint16_t len;
   } __aligned(EHCI_QTD_ALIGN);
   
   typedef struct ehci_qtd ehci_qtd_t;
   
   /* Queue Head Sub Structure */
   struct ehci_qh_sub {
           volatile uint32_t qtd_next;
           volatile uint32_t qtd_altnext;
           volatile uint32_t qtd_status;
           volatile uint32_t qtd_buffer[EHCI_QTD_NBUFFERS];
           volatile uint32_t qtd_buffer_hi[EHCI_QTD_NBUFFERS];
   } __aligned(4);
   
   /* Queue Head */
   struct ehci_qh {
           volatile uint32_t qh_link;
           volatile uint32_t qh_endp;
   #define EHCI_QH_GET_ADDR(x)     (((x) >>  0) & 0x7f)    /* endpoint addr */
   #define EHCI_QH_SET_ADDR(x)     (x)
   #define EHCI_QH_ADDRMASK        0x0000007f
   #define EHCI_QH_GET_INACT(x)    (((x) >>  7) & 0x01)    /* inactivate on next */
   #define EHCI_QH_INACT           0x00000080
   #define EHCI_QH_GET_ENDPT(x)    (((x) >>  8) & 0x0f)    /* endpoint no */
   #define EHCI_QH_SET_ENDPT(x)    ((x) <<  8)
   #define EHCI_QH_GET_EPS(x)      (((x) >> 12) & 0x03)    /* endpoint speed */
   #define EHCI_QH_SET_EPS(x)      ((x) << 12)
   #define EHCI_QH_SPEED_FULL      0x0
   #define EHCI_QH_SPEED_LOW       0x1
   #define EHCI_QH_SPEED_HIGH      0x2
   #define EHCI_QH_GET_DTC(x)      (((x) >> 14) & 0x01)    /* data toggle control */
   #define EHCI_QH_DTC             0x00004000
   #define EHCI_QH_GET_HRECL(x)    (((x) >> 15) & 0x01)    /* head of reclamation */
   #define EHCI_QH_HRECL           0x00008000
   #define EHCI_QH_GET_MPL(x)      (((x) >> 16) & 0x7ff)   /* max packet len */
   #define EHCI_QH_SET_MPL(x)      ((x) << 16)
   #define EHCI_QH_MPLMASK         0x07ff0000
   #define EHCI_QH_GET_CTL(x)      (((x) >> 27) & 0x01)    /* control endpoint */
   #define EHCI_QH_CTL             0x08000000
   #define EHCI_QH_GET_NRL(x)      (((x) >> 28) & 0x0f)    /* NAK reload */
   #define EHCI_QH_SET_NRL(x)      ((x) << 28)
           volatile uint32_t qh_endphub;
   #define EHCI_QH_GET_SMASK(x)    (((x) >>  0) & 0xff)    /* intr sched mask */
   #define EHCI_QH_SET_SMASK(x)    ((x) <<  0)
   #define EHCI_QH_GET_CMASK(x)    (((x) >>  8) & 0xff)    /* split completion mask */
   #define EHCI_QH_SET_CMASK(x)    ((x) <<  8)
   #define EHCI_QH_GET_HUBA(x)     (((x) >> 16) & 0x7f)    /* hub address */
   #define EHCI_QH_SET_HUBA(x)     ((x) << 16)
   #define EHCI_QH_GET_PORT(x)     (((x) >> 23) & 0x7f)    /* hub port */
   #define EHCI_QH_SET_PORT(x)     ((x) << 23)
   #define EHCI_QH_GET_MULT(x)     (((x) >> 30) & 0x03)    /* pipe multiplier */
   #define EHCI_QH_SET_MULT(x)     ((x) << 30)
           volatile uint32_t qh_curqtd;
           struct ehci_qh_sub qh_qtd;
   /*
    * Extra information needed:
    */
           struct ehci_qh *next;
           struct ehci_qh *prev;
           struct ehci_qh *obj_next;
           struct usb_page_cache *page_cache;
           uint32_t qh_self;
   } __aligned(EHCI_QH_ALIGN);
   
   typedef struct ehci_qh ehci_qh_t;
   
   /* Periodic Frame Span Traversal Node */
   struct ehci_fstn {
           volatile uint32_t fstn_link;
           volatile uint32_t fstn_back;
   } __aligned(EHCI_FSTN_ALIGN);
   
   typedef struct ehci_fstn ehci_fstn_t;
   
   struct ehci_hw_softc {
           struct usb_page_cache pframes_pc;
           struct usb_page_cache terminate_pc;
           struct usb_page_cache async_start_pc;
           struct usb_page_cache intr_start_pc[EHCI_VIRTUAL_FRAMELIST_COUNT];
           struct usb_page_cache isoc_hs_start_pc[EHCI_VIRTUAL_FRAMELIST_COUNT];
           struct usb_page_cache isoc_fs_start_pc[EHCI_VIRTUAL_FRAMELIST_COUNT];
   
           struct usb_page pframes_pg;
           struct usb_page terminate_pg;
           struct usb_page async_start_pg;
           struct usb_page intr_start_pg[EHCI_VIRTUAL_FRAMELIST_COUNT];
           struct usb_page isoc_hs_start_pg[EHCI_VIRTUAL_FRAMELIST_COUNT];
           struct usb_page isoc_fs_start_pg[EHCI_VIRTUAL_FRAMELIST_COUNT];
   };
   
   struct ehci_config_desc {
           struct usb_config_descriptor confd;
           struct usb_interface_descriptor ifcd;
           struct usb_endpoint_descriptor endpd;
   } __packed;
   
   union ehci_hub_desc {
           struct usb_status stat;
           struct usb_port_status ps;
           struct usb_hub_descriptor hubd;
           uint8_t temp[128];
   };
   
   typedef struct ehci_softc {
           struct ehci_hw_softc sc_hw;
           struct usb_bus sc_bus;          /* base device */
           struct usb_callout sc_tmo_pcd;
           struct usb_callout sc_tmo_poll;
           union ehci_hub_desc sc_hub_desc;
   
           struct usb_device *sc_devices[EHCI_MAX_DEVICES];
           struct resource *sc_io_res;
           struct resource *sc_irq_res;
           struct ehci_qh *sc_async_p_last;
           struct ehci_qh *sc_intr_p_last[EHCI_VIRTUAL_FRAMELIST_COUNT];
           struct ehci_sitd *sc_isoc_fs_p_last[EHCI_VIRTUAL_FRAMELIST_COUNT];
           struct ehci_itd *sc_isoc_hs_p_last[EHCI_VIRTUAL_FRAMELIST_COUNT];
           void   *sc_intr_hdl;
           bus_size_t sc_io_size;
           bus_space_tag_t sc_io_tag;
           bus_space_handle_t sc_io_hdl;
   
           uint32_t sc_terminate_self;     /* TD short packet termination pointer */
           uint32_t sc_eintrs;
   
           uint16_t sc_intr_stat[EHCI_VIRTUAL_FRAMELIST_COUNT];
           uint16_t sc_id_vendor;          /* vendor ID for root hub */
           uint16_t sc_flags;              /* chip specific flags */
   #define EHCI_SCFLG_NORESTERM    0x0004  /* don't terminate reset sequence */
   #define EHCI_SCFLG_BIGEDESC     0x0008  /* big-endian byte order descriptors */
   #define EHCI_SCFLG_TT           0x0020  /* transaction translator present */
   #define EHCI_SCFLG_LOSTINTRBUG  0x0040  /* workaround for VIA / ATI chipsets */
   #define EHCI_SCFLG_IAADBUG      0x0080  /* workaround for nVidia chipsets */
   #define EHCI_SCFLG_DONTRESET    0x0100  /* don't reset ctrl. in ehci_init() */
   #define EHCI_SCFLG_DONEINIT     0x1000  /* ehci_init() has been called. */
   
           uint8_t sc_offs;                /* offset to operational registers */
           uint8_t sc_doorbell_disable;    /* set on doorbell failure */
           uint8_t sc_noport;
           uint8_t sc_addr;                /* device address */
           uint8_t sc_conf;                /* device configuration */
           uint8_t sc_isreset;
           uint8_t sc_hub_idata[8];
   
           char    sc_vendor[16];          /* vendor string for root hub */
   
           void    (*sc_vendor_post_reset)(struct ehci_softc *sc);
           uint16_t (*sc_vendor_get_port_speed)(struct ehci_softc *sc,
               uint16_t index);
   
   } ehci_softc_t;
   
   #define EREAD1(sc, a)   bus_space_read_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (a))
   #define EREAD2(sc, a)   bus_space_read_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (a))
   #define EREAD4(sc, a)   bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (a))
   #define EWRITE1(sc, a, x)                                               \
               bus_space_write_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (a), (x))
   #define EWRITE2(sc, a, x)                                               \
               bus_space_write_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (a), (x))
   #define EWRITE4(sc, a, x)                                               \
               bus_space_write_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (a), (x))
   #define EOREAD1(sc, a)                                                  \
               bus_space_read_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (sc)->sc_offs+(a))
   #define EOREAD2(sc, a)                                                  \
               bus_space_read_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (sc)->sc_offs+(a))
   #define EOREAD4(sc, a)                                                  \
               bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (sc)->sc_offs+(a))
   #define EOWRITE1(sc, a, x)                                              \
               bus_space_write_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (sc)->sc_offs+(a), (x))
   #define EOWRITE2(sc, a, x)                                              \
               bus_space_write_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (sc)->sc_offs+(a), (x))
   #define EOWRITE4(sc, a, x)                                              \
               bus_space_write_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (sc)->sc_offs+(a), (x))
   
   #ifdef USB_EHCI_BIG_ENDIAN_DESC
   /*
    * Handle byte order conversion between host and ``host controller''.
    * Typically the latter is little-endian but some controllers require
    * big-endian in which case we may need to manually swap.
    */
   static __inline uint32_t
   htohc32(const struct ehci_softc *sc, const uint32_t v)
   {
           return sc->sc_flags & EHCI_SCFLG_BIGEDESC ? htobe32(v) : htole32(v);
   }
   
   static __inline uint16_t
   htohc16(const struct ehci_softc *sc, const uint16_t v)
   {
           return sc->sc_flags & EHCI_SCFLG_BIGEDESC ? htobe16(v) : htole16(v);
   }
   
   static __inline uint32_t
   hc32toh(const struct ehci_softc *sc, const uint32_t v)
   {
           return sc->sc_flags & EHCI_SCFLG_BIGEDESC ? be32toh(v) : le32toh(v);
   }
   
   static __inline uint16_t
   hc16toh(const struct ehci_softc *sc, const uint16_t v)
   {
           return sc->sc_flags & EHCI_SCFLG_BIGEDESC ? be16toh(v) : le16toh(v);
   }
   #else
   /*
    * Normal little-endian only conversion routines.
    */
   static __inline uint32_t
   htohc32(const struct ehci_softc *sc, const uint32_t v)
   {
           return htole32(v);
   }
   
   static __inline uint16_t
   htohc16(const struct ehci_softc *sc, const uint16_t v)
   {
           return htole16(v);
   }
   
   static __inline uint32_t
   hc32toh(const struct ehci_softc *sc, const uint32_t v)
   {
           return le32toh(v);
   }
   
   static __inline uint16_t
   hc16toh(const struct ehci_softc *sc, const uint16_t v)
   {
           return le16toh(v);
   }
   #endif
   
   usb_bus_mem_cb_t ehci_iterate_hw_softc;
   
   usb_error_t ehci_reset(ehci_softc_t *sc);
   usb_error_t ehci_init(ehci_softc_t *sc);
   void    ehci_detach(struct ehci_softc *sc);
   void    ehci_interrupt(ehci_softc_t *sc);
   uint16_t ehci_get_port_speed_portsc(struct ehci_softc *sc, uint16_t index);
   uint16_t ehci_get_port_speed_hostc(struct ehci_softc *sc, uint16_t index);
   
   #endif                                  /* _EHCI_H_ */

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