drivers/media/pci/cx25821/cx25821-audio.h

   1 /*
   2  *  Driver for the Conexant CX25821 PCIe bridge
   3  *
   4  *  Copyright (C) 2009 Conexant Systems Inc.
   5  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *
  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 this program; if not, write to the Free Software
  20  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #ifndef __CX25821_AUDIO_H__
  24 #define __CX25821_AUDIO_H__
  25
  26 #define USE_RISC_NOOP           1
  27 #define LINES_PER_BUFFER        15
  28 #define AUDIO_LINE_SIZE         128
  29
  30 /* Number of buffer programs to use at once. */
  31 #define NUMBER_OF_PROGRAMS      8
  32
  33 /*
  34  * Max size of the RISC program for a buffer. - worst case is 2 writes per line
  35  * Space is also added for the 4 no-op instructions added on the end.
  36  */
  37 #ifndef USE_RISC_NOOP
  38 #define MAX_BUFFER_PROGRAM_SIZE                                         \
  39         (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +           \
  40          RISC_WRITECR_INSTRUCTION_SIZE * 4)
  41 #endif
  42
  43 /* MAE 12 July 2005 Try to use NOOP RISC instruction instead */
  44 #ifdef USE_RISC_NOOP
  45 #define MAX_BUFFER_PROGRAM_SIZE                                         \
  46         (2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +           \
  47          RISC_NOOP_INSTRUCTION_SIZE * 4)
  48 #endif
  49
  50 /* Sizes of various instructions in bytes.  Used when adding instructions. */
  51 #define RISC_WRITE_INSTRUCTION_SIZE     12
  52 #define RISC_JUMP_INSTRUCTION_SIZE      12
  53 #define RISC_SKIP_INSTRUCTION_SIZE      4
  54 #define RISC_SYNC_INSTRUCTION_SIZE      4
  55 #define RISC_WRITECR_INSTRUCTION_SIZE   16
  56 #define RISC_NOOP_INSTRUCTION_SIZE      4
  57
  58 #define MAX_AUDIO_DMA_BUFFER_SIZE                                       \
  59         (MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS +                 \
  60          RISC_SYNC_INSTRUCTION_SIZE)
  61
  62 #endif