seq_device.h 2.1 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. #ifndef __SOUND_SEQ_DEVICE_H
  3. #define __SOUND_SEQ_DEVICE_H
  4. /*
  5. * ALSA sequencer device management
  6. * Copyright (c) 1999 by Takashi Iwai <[email protected]>
  7. */
  8. /*
  9. * registered device information
  10. */
  11. struct snd_seq_device {
  12. /* device info */
  13. struct snd_card *card; /* sound card */
  14. int device; /* device number */
  15. const char *id; /* driver id */
  16. char name[80]; /* device name */
  17. int argsize; /* size of the argument */
  18. void *driver_data; /* private data for driver */
  19. void *private_data; /* private data for the caller */
  20. void (*private_free)(struct snd_seq_device *device);
  21. struct device dev;
  22. };
  23. #define to_seq_dev(_dev) \
  24. container_of(_dev, struct snd_seq_device, dev)
  25. /* sequencer driver */
  26. /* driver operators
  27. * probe:
  28. * Initialize the device with given parameters.
  29. * Typically,
  30. * 1. call snd_hwdep_new
  31. * 2. allocate private data and initialize it
  32. * 3. call snd_hwdep_register
  33. * 4. store the instance to dev->driver_data pointer.
  34. *
  35. * remove:
  36. * Release the private data.
  37. * Typically, call snd_device_free(dev->card, dev->driver_data)
  38. */
  39. struct snd_seq_driver {
  40. struct device_driver driver;
  41. char *id;
  42. int argsize;
  43. };
  44. #define to_seq_drv(_drv) \
  45. container_of(_drv, struct snd_seq_driver, driver)
  46. /*
  47. * prototypes
  48. */
  49. #ifdef CONFIG_MODULES
  50. void snd_seq_device_load_drivers(void);
  51. #else
  52. #define snd_seq_device_load_drivers()
  53. #endif
  54. int snd_seq_device_new(struct snd_card *card, int device, const char *id,
  55. int argsize, struct snd_seq_device **result);
  56. #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device))
  57. int __must_check __snd_seq_driver_register(struct snd_seq_driver *drv,
  58. struct module *mod);
  59. #define snd_seq_driver_register(drv) \
  60. __snd_seq_driver_register(drv, THIS_MODULE)
  61. void snd_seq_driver_unregister(struct snd_seq_driver *drv);
  62. #define module_snd_seq_driver(drv) \
  63. module_driver(drv, snd_seq_driver_register, snd_seq_driver_unregister)
  64. /*
  65. * id strings for generic devices
  66. */
  67. #define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi"
  68. #define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth"
  69. #endif /* __SOUND_SEQ_DEVICE_H */