aica.h 1.7 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-only */
  2. /* aica.h
  3. * Header file for ALSA driver for
  4. * Sega Dreamcast Yamaha AICA sound
  5. * Copyright Adrian McMenamin
  6. * <adrian@mcmen.demon.co.uk>
  7. * 2006
  8. */
  9. /* SPU memory and register constants etc */
  10. #define G2_FIFO 0xa05f688c
  11. #define SPU_MEMORY_BASE 0xA0800000
  12. #define ARM_RESET_REGISTER 0xA0702C00
  13. #define SPU_REGISTER_BASE 0xA0700000
  14. /* AICA channels stuff */
  15. #define AICA_CONTROL_POINT 0xA0810000
  16. #define AICA_CONTROL_CHANNEL_SAMPLE_NUMBER 0xA0810008
  17. #define AICA_CHANNEL0_CONTROL_OFFSET 0x10004
  18. /* Command values */
  19. #define AICA_CMD_KICK 0x80000000
  20. #define AICA_CMD_NONE 0
  21. #define AICA_CMD_START 1
  22. #define AICA_CMD_STOP 2
  23. #define AICA_CMD_VOL 3
  24. /* Sound modes */
  25. #define SM_8BIT 1
  26. #define SM_16BIT 0
  27. #define SM_ADPCM 2
  28. /* Buffer and period size */
  29. #define AICA_BUFFER_SIZE 0x8000
  30. #define AICA_PERIOD_SIZE 0x800
  31. #define AICA_PERIOD_NUMBER 16
  32. #define AICA_CHANNEL0_OFFSET 0x11000
  33. #define AICA_CHANNEL1_OFFSET 0x21000
  34. #define CHANNEL_OFFSET 0x10000
  35. #define AICA_DMA_CHANNEL 5
  36. #define AICA_DMA_MODE 5
  37. #define SND_AICA_DRIVER "AICA"
  38. struct aica_channel {
  39. uint32_t cmd; /* Command ID */
  40. uint32_t pos; /* Sample position */
  41. uint32_t length; /* Sample length */
  42. uint32_t freq; /* Frequency */
  43. uint32_t vol; /* Volume 0-255 */
  44. uint32_t pan; /* Pan 0-255 */
  45. uint32_t sfmt; /* Sound format */
  46. uint32_t flags; /* Bit flags */
  47. };
  48. struct snd_card_aica {
  49. struct work_struct spu_dma_work;
  50. struct snd_card *card;
  51. struct aica_channel *channel;
  52. struct snd_pcm_substream *substream;
  53. int clicks;
  54. int current_period;
  55. struct timer_list timer;
  56. int master_volume;
  57. int dma_check;
  58. };