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   1 #ifndef __USBHID_H
   2 #define __USBHID_H
   3
   4 /*
   5  *  Copyright (c) 1999 Andreas Gal
   6  *  Copyright (c) 2000-2001 Vojtech Pavlik
   7  *  Copyright (c) 2006 Jiri Kosina
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24  *
  25  */
  26
  27 #include <linux/types.h>
  28 #include <linux/slab.h>
  29 #include <linux/list.h>
  30 #include <linux/timer.h>
  31 #include <linux/wait.h>
  32 #include <linux/workqueue.h>
  33 #include <linux/input.h>
  34
  35 /*  API provided by hid-core.c for USB HID drivers */
  36 int usbhid_wait_io(struct hid_device* hid);
  37 void usbhid_close(struct hid_device *hid);
  38 int usbhid_open(struct hid_device *hid);
  39 void usbhid_init_reports(struct hid_device *hid);
  40 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir);
  41
  42 /*
  43  * USB-specific HID struct, to be pointed to
  44  * from struct hid_device->driver_data
  45  */
  46
  47 struct usbhid_device {
  48         struct hid_device *hid;                                         /* pointer to corresponding HID dev */
  49
  50         struct usb_interface *intf;                                     /* USB interface */
  51         int ifnum;                                                      /* USB interface number */
  52
  53         unsigned int bufsize;                                           /* URB buffer size */
  54
  55         struct urb *urbin;                                              /* Input URB */
  56         char *inbuf;                                                    /* Input buffer */
  57         dma_addr_t inbuf_dma;                                           /* Input buffer dma */
  58         spinlock_t inlock;                                              /* Input fifo spinlock */
  59
  60         struct urb *urbctrl;                                            /* Control URB */
  61         struct usb_ctrlrequest *cr;                                     /* Control request struct */
  62         dma_addr_t cr_dma;                                              /* Control request struct dma */
  63         struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE];            /* Control fifo */
  64         unsigned char ctrlhead, ctrltail;                               /* Control fifo head & tail */
  65         char *ctrlbuf;                                                  /* Control buffer */
  66         dma_addr_t ctrlbuf_dma;                                         /* Control buffer dma */
  67         spinlock_t ctrllock;                                            /* Control fifo spinlock */
  68
  69         struct urb *urbout;                                             /* Output URB */
  70         struct hid_report *out[HID_CONTROL_FIFO_SIZE];                  /* Output pipe fifo */
  71         unsigned char outhead, outtail;                                 /* Output pipe fifo head & tail */
  72         char *outbuf;                                                   /* Output buffer */
  73         dma_addr_t outbuf_dma;                                          /* Output buffer dma */
  74         spinlock_t outlock;                                             /* Output fifo spinlock */
  75
  76         unsigned long iofl;                                             /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
  77         struct timer_list io_retry;                                     /* Retry timer */
  78         unsigned long stop_retry;                                       /* Time to give up, in jiffies */
  79         unsigned int retry_delay;                                       /* Delay length in ms */
  80         struct work_struct reset_work;                                  /* Task context for resets */
  81         wait_queue_head_t wait;                                         /* For sleeping */
  82 };
  83
  84 #define hid_to_usb_dev(hid_dev) \
  85         container_of(hid_dev->dev.parent->parent, struct usb_device, dev)
  86
  87 #endif
  88