drivers/staging/dt3155/dt3155_isr.h

   1 /*
   2
   3 Copyright 1996,2002 Gregory D. Hager, Alfred A. Rizzi, Noah J. Cowan,
   4                     Jason Lapenta, Scott Smedley
   5
   6 This file is part of the DT3155 Device Driver.
   7
   8 The DT3155 Device Driver is free software; you can redistribute it
   9 and/or modify it under the terms of the GNU General Public License as
  10 published by the Free Software Foundation; either version 2 of the
  11 License, or (at your option) any later version.
  12
  13 The DT3155 Device Driver is distributed in the hope that it will be
  14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with the DT3155 Device Driver; if not, write to the Free
  20 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 MA 02111-1307 USA
  22
  23
  24 -- Changes --
  25
  26   Date     Programmer   Description of changes made
  27   -------------------------------------------------------------------
  28   03-Jul-2000 JML       n/a
  29   24-Jul-2002 SS        GPL licence.
  30   26-Oct-2009 SS        Porting to 2.6.30 kernel.
  31
  32 -- notes --
  33
  34 */
  35
  36 #ifndef DT3155_ISR_H
  37 #define DT3155_ISR_H
  38
  39 /**********************************
  40  * User functions for buffering
  41  **********************************/
  42
  43 /*
  44  * Initialize the buffering system.
  45  * This should be called prior to enabling interrupts
  46  */
  47 u32 dt3155_setup_buffers(u32 *allocatorAddr);
  48
  49 /*
  50  * Get the next frame of data if it is ready.
  51  * Returns zero if no data is ready.  If there is data but the user has a
  52  * locked buffer, it will unlock that buffer and return it to the free list.
  53  */
  54 int dt3155_get_ready_buffer(struct dt3155_fbuffer *fb);
  55
  56 /*
  57  * Return a locked buffer to the free list.
  58  */
  59 void dt3155_release_locked_buffer(struct dt3155_fbuffer *fb);
  60
  61 /*
  62  * Flush the buffer system.
  63  */
  64 int dt3155_flush(struct dt3155_fbuffer *fb);
  65
  66 /**********************************
  67  * Simple array based que struct
  68  **********************************/
  69
  70 bool are_empty_buffers(struct dt3155_fbuffer *fb);
  71 void push_empty(struct dt3155_fbuffer *fb, int index);
  72
  73 int pop_empty(struct dt3155_fbuffer *fb);
  74
  75 bool is_ready_buf_empty(struct dt3155_fbuffer *fb);
  76 bool is_ready_buf_full(struct dt3155_fbuffer *fb);
  77
  78 void push_ready(struct dt3155_fbuffer *fb, int index);
  79 int  pop_ready(struct dt3155_fbuffer *fb);
  80
  81 void printques(struct dt3155_fbuffer *fb);
  82
  83 #endif