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drivers
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media
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pci
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cx25821
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cx25821-audio.h

cx25821-audio.h 2.0 KB
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  1. /*
    2. 

  2.  *  Driver for the Conexant CX25821 PCIe bridge
    3. 

  3.  *
    4. 

  4.  *  Copyright (C) 2009 Conexant Systems Inc.
    5. 

  5.  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
    6. 

  6.  *
    7. 

  7.  *  This program is free software; you can redistribute it and/or modify
    8. 

  8.  *  it under the terms of the GNU General Public License as published by
    9. 

  9.  *  the Free Software Foundation; either version 2 of the License, or
    10. 

  10.  *  (at your option) any later version.
    11. 

  11.  *
    12. 

  12.  *  This program is distributed in the hope that it will be useful,
    13. 

  13.  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    14. 

  14.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    15. 

  15.  *
    16. 

  16.  *  GNU General Public License for more details.
    17. 

  17.  *
    18. 

  18.  *  You should have received a copy of the GNU General Public License
    19. 

  19.  *  along with this program; if not, write to the Free Software
    20. 

  20.  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    21. 

  21.  */
    22. 

  22. 

  23. #ifndef __CX25821_AUDIO_H__
    24. 

  24. #define __CX25821_AUDIO_H__
    25. 

  25. 

  26. #define USE_RISC_NOOP		1
    27. 

  27. #define LINES_PER_BUFFER	15
    28. 

  28. #define AUDIO_LINE_SIZE		128
    29. 

  29. 

  30. /* Number of buffer programs to use at once. */
    31. 

  31. #define NUMBER_OF_PROGRAMS	8
    32. 

  32. 

  33. /*
    34. 

  34.  * Max size of the RISC program for a buffer. - worst case is 2 writes per line
    35. 

  35.  * Space is also added for the 4 no-op instructions added on the end.
    36. 

  36.  */
    37. 

  37. #ifndef USE_RISC_NOOP
    38. 

  38. #define MAX_BUFFER_PROGRAM_SIZE						\
    39. 

  39. 	(2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +		\
    40. 

  40. 	 RISC_WRITECR_INSTRUCTION_SIZE * 4)
    41. 

  41. #endif
    42. 

  42. 

  43. /* MAE 12 July 2005 Try to use NOOP RISC instruction instead */
    44. 

  44. #ifdef USE_RISC_NOOP
    45. 

  45. #define MAX_BUFFER_PROGRAM_SIZE						\
    46. 

  46. 	(2 * LINES_PER_BUFFER * RISC_WRITE_INSTRUCTION_SIZE +		\
    47. 

  47. 	 RISC_NOOP_INSTRUCTION_SIZE * 4)
    48. 

  48. #endif
    49. 

  49. 

  50. /* Sizes of various instructions in bytes.  Used when adding instructions. */
    51. 

  51. #define RISC_WRITE_INSTRUCTION_SIZE	12
    52. 

  52. #define RISC_JUMP_INSTRUCTION_SIZE	12
    53. 

  53. #define RISC_SKIP_INSTRUCTION_SIZE	4
    54. 

  54. #define RISC_SYNC_INSTRUCTION_SIZE	4
    55. 

  55. #define RISC_WRITECR_INSTRUCTION_SIZE	16
    56. 

  56. #define RISC_NOOP_INSTRUCTION_SIZE	4
    57. 

  57. 

  58. #define MAX_AUDIO_DMA_BUFFER_SIZE					\
    59. 

  59. 	(MAX_BUFFER_PROGRAM_SIZE * NUMBER_OF_PROGRAMS +			\
    60. 

  60. 	 RISC_SYNC_INSTRUCTION_SIZE)
    61. 

  61. 

  62. #endif
    63.