w1_internal.h 2.6 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /*
  3. * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net>
  4. */
  5. #ifndef __W1_H
  6. #define __W1_H
  7. #include <linux/w1.h>
  8. #include <linux/completion.h>
  9. #include <linux/mutex.h>
  10. #define W1_SLAVE_ACTIVE 0
  11. #define W1_SLAVE_DETACH 1
  12. /**
  13. * struct w1_async_cmd - execute callback from the w1_process kthread
  14. * @async_entry: link entry
  15. * @cb: callback function, must list_del and destroy this list before
  16. * returning
  17. *
  18. * When inserted into the w1_master async_list, w1_process will execute
  19. * the callback. Embed this into the structure with the command details.
  20. */
  21. struct w1_async_cmd {
  22. struct list_head async_entry;
  23. void (*cb)(struct w1_master *dev, struct w1_async_cmd *async_cmd);
  24. };
  25. int w1_create_master_attributes(struct w1_master *master);
  26. void w1_destroy_master_attributes(struct w1_master *master);
  27. void w1_search(struct w1_master *dev, u8 search_type,
  28. w1_slave_found_callback cb);
  29. void w1_search_devices(struct w1_master *dev, u8 search_type,
  30. w1_slave_found_callback cb);
  31. /* call w1_unref_slave to release the reference counts w1_search_slave added */
  32. struct w1_slave *w1_search_slave(struct w1_reg_num *id);
  33. /*
  34. * decrements the reference on sl->master and sl, and cleans up if zero
  35. * returns the reference count after it has been decremented
  36. */
  37. int w1_unref_slave(struct w1_slave *sl);
  38. void w1_slave_found(struct w1_master *dev, u64 rn);
  39. void w1_search_process_cb(struct w1_master *dev, u8 search_type,
  40. w1_slave_found_callback cb);
  41. struct w1_slave *w1_slave_search_device(struct w1_master *dev,
  42. struct w1_reg_num *rn);
  43. struct w1_master *w1_search_master_id(u32 id);
  44. /* Disconnect and reconnect devices in the given family. Used for finding
  45. * unclaimed devices after a family has been registered or releasing devices
  46. * after a family has been unregistered. Set attach to 1 when a new family
  47. * has just been registered, to 0 when it has been unregistered.
  48. */
  49. void w1_reconnect_slaves(struct w1_family *f, int attach);
  50. int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn);
  51. /* 0 success, otherwise EBUSY */
  52. int w1_slave_detach(struct w1_slave *sl);
  53. void __w1_remove_master_device(struct w1_master *dev);
  54. void w1_family_put(struct w1_family *f);
  55. void __w1_family_get(struct w1_family *f);
  56. struct w1_family *w1_family_registered(u8 fid);
  57. extern struct device_driver w1_master_driver;
  58. extern struct device w1_master_device;
  59. extern int w1_max_slave_count;
  60. extern int w1_max_slave_ttl;
  61. extern struct list_head w1_masters;
  62. extern struct mutex w1_mlock;
  63. extern spinlock_t w1_flock;
  64. int w1_process_callbacks(struct w1_master *dev);
  65. int w1_process(void *data);
  66. #endif /* __W1_H */