sys/bus/u4b/usb_dev.h

   1 /* $FreeBSD$ */
   2 /*-
   3  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #ifndef _USB_DEV_H_
  28 #define _USB_DEV_H_
  29
  30 #include <sys/file.h>
  31 #include <sys/poll.h>
  32 #include <sys/signalvar.h>
  33 #include <sys/proc.h>
  34
  35 struct usb_fifo;
  36 struct usb_mbuf;
  37
  38 struct usb_symlink {
  39         TAILQ_ENTRY(usb_symlink) sym_entry;
  40         char    src_path[32];           /* Source path - including terminating
  41                                          * zero */
  42         char    dst_path[32];           /* Destination path - including
  43                                          * terminating zero */
  44         uint8_t src_len;                /* String length */
  45         uint8_t dst_len;                /* String length */
  46 };
  47
  48 /*
  49  * Private per-device information.
  50  */
  51 struct usb_cdev_privdata {
  52         struct usb_bus          *bus;
  53         struct usb_device       *udev;
  54         struct usb_interface    *iface;
  55         int                     bus_index;      /* bus index */
  56         int                     dev_index;      /* device index */
  57         int                     ep_addr;        /* endpoint address */
  58         int                     fflags;
  59         uint8_t                 fifo_index;     /* FIFO index */
  60 };
  61
  62 /*
  63  * The following structure defines a minimum re-implementation of the
  64  * ifqueue structure in the kernel.
  65  */
  66 struct usb_ifqueue {
  67         struct usb_mbuf *ifq_head;
  68         struct usb_mbuf *ifq_tail;
  69
  70         usb_size_t ifq_len;
  71         usb_size_t ifq_maxlen;
  72 };
  73
  74 /*
  75  * Private per-device and per-thread reference information
  76  */
  77 struct usb_cdev_refdata {
  78         struct usb_fifo         *rxfifo;
  79         struct usb_fifo         *txfifo;
  80         uint8_t                 is_read;        /* location has read access */
  81         uint8_t                 is_write;       /* location has write access */
  82         uint8_t                 is_uref;        /* USB refcount decr. needed */
  83         uint8_t                 is_usbfs;       /* USB-FS is active */
  84         uint8_t                 do_unlock;      /* USB enum unlock needed */
  85 };
  86
  87 struct usb_fs_privdata {
  88         int bus_index;
  89         int dev_index;
  90         int ep_addr;
  91         int mode;
  92         int fifo_index;
  93         struct cdev *cdev;
  94
  95         LIST_ENTRY(usb_fs_privdata) pd_next;
  96 };
  97
  98 /*
  99  * Most of the fields in the "usb_fifo" structure are used by the
 100  * generic USB access layer.
 101  */
 102 struct usb_fifo {
 103         struct usb_ifqueue free_q;
 104         struct usb_ifqueue used_q;
 105         struct kqinfo selinfo;
 106         struct cv cv_io;
 107         struct cv cv_drain;
 108         struct usb_fifo_methods *methods;
 109         struct usb_symlink *symlink[2];/* our symlinks */
 110         struct proc *async_p;           /* process that wants SIGIO */
 111         struct usb_fs_endpoint *fs_ep_ptr;
 112         struct usb_device *udev;
 113         struct usb_xfer *xfer[2];
 114         struct usb_xfer **fs_xfer;
 115         struct lock *priv_lock;         /* client data */
 116         /* set if FIFO is opened by a FILE: */
 117         struct usb_cdev_privdata *curr_cpd;
 118         void   *priv_sc0;               /* client data */
 119         void   *priv_sc1;               /* client data */
 120         void   *queue_data;
 121         usb_timeout_t timeout;          /* timeout in milliseconds */
 122         usb_frlength_t bufsize;         /* BULK and INTERRUPT buffer size */
 123         usb_frcount_t nframes;          /* for isochronous mode */
 124         uint16_t dev_ep_index;          /* our device endpoint index */
 125         uint8_t flag_sleeping;          /* set if FIFO is sleeping */
 126         uint8_t flag_iscomplete;        /* set if a USB transfer is complete */
 127         uint8_t flag_iserror;           /* set if FIFO error happened */
 128         uint8_t flag_isselect;          /* set if FIFO is selected */
 129         uint8_t flag_flushing;          /* set if FIFO is flushing data */
 130         uint8_t flag_short;             /* set if short_ok or force_short
 131                                          * transfer flags should be set */
 132         uint8_t flag_stall;             /* set if clear stall should be run */
 133         uint8_t flag_write_defrag;      /* set to defrag written data */
 134         uint8_t flag_have_fragment;     /* set if defragging */
 135         uint8_t iface_index;            /* set to the interface we belong to */
 136         uint8_t fifo_index;             /* set to the FIFO index in "struct
 137                                          * usb_device" */
 138         uint8_t fs_ep_max;
 139         uint8_t fifo_zlp;               /* zero length packet count */
 140         uint8_t refcount;
 141 #define USB_FIFO_REF_MAX 0xFF
 142 };
 143
 144 extern struct dev_ops usb_ops;
 145
 146 int     usb_fifo_wait(struct usb_fifo *fifo);
 147 void    usb_fifo_signal(struct usb_fifo *fifo);
 148 uint8_t usb_fifo_opened(struct usb_fifo *fifo);
 149 struct usb_symlink *usb_alloc_symlink(const char *target);
 150 void    usb_free_symlink(struct usb_symlink *ps);
 151 int     usb_read_symlink(uint8_t *user_ptr, uint32_t startentry,
 152             uint32_t user_len);
 153
 154 #endif                                  /* _USB_DEV_H_ */