nfc.h 4.0 KB

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  1. /*
  2. * Copyright (C) 2011 Instituto Nokia de Tecnologia
  3. *
  4. * Authors:
  5. * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
  6. * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
  7. *
  8. * This program is free software; you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License as published by
  10. * the Free Software Foundation; either version 2 of the License, or
  11. * (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  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
  20. * Free Software Foundation, Inc.,
  21. * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22. */
  23. #ifndef __NET_NFC_H
  24. #define __NET_NFC_H
  25. #include <linux/device.h>
  26. #include <linux/skbuff.h>
  27. #define nfc_dev_info(dev, fmt, arg...) dev_info((dev), "NFC: " fmt "\n", ## arg)
  28. #define nfc_dev_err(dev, fmt, arg...) dev_err((dev), "NFC: " fmt "\n", ## arg)
  29. #define nfc_dev_dbg(dev, fmt, arg...) dev_dbg((dev), fmt "\n", ## arg)
  30. struct nfc_dev;
  31. /**
  32. * data_exchange_cb_t - Definition of nfc_data_exchange callback
  33. *
  34. * @context: nfc_data_exchange cb_context parameter
  35. * @skb: response data
  36. * @err: If an error has occurred during data exchange, it is the
  37. * error number. Zero means no error.
  38. *
  39. * When a rx or tx package is lost or corrupted or the target gets out
  40. * of the operating field, err is -EIO.
  41. */
  42. typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,
  43. int err);
  44. struct nfc_ops {
  45. int (*start_poll)(struct nfc_dev *dev, u32 protocols);
  46. void (*stop_poll)(struct nfc_dev *dev);
  47. int (*activate_target)(struct nfc_dev *dev, u32 target_idx,
  48. u32 protocol);
  49. void (*deactivate_target)(struct nfc_dev *dev, u32 target_idx);
  50. int (*data_exchange)(struct nfc_dev *dev, u32 target_idx,
  51. struct sk_buff *skb, data_exchange_cb_t cb,
  52. void *cb_context);
  53. };
  54. struct nfc_target {
  55. u32 idx;
  56. u32 supported_protocols;
  57. u16 sens_res;
  58. u8 sel_res;
  59. };
  60. struct nfc_genl_data {
  61. u32 poll_req_pid;
  62. struct mutex genl_data_mutex;
  63. };
  64. struct nfc_dev {
  65. unsigned idx;
  66. unsigned target_idx;
  67. struct nfc_target *targets;
  68. int n_targets;
  69. int targets_generation;
  70. spinlock_t targets_lock;
  71. struct device dev;
  72. bool polling;
  73. struct nfc_genl_data genl_data;
  74. u32 supported_protocols;
  75. int tx_headroom;
  76. int tx_tailroom;
  77. struct nfc_ops *ops;
  78. };
  79. #define to_nfc_dev(_dev) container_of(_dev, struct nfc_dev, dev)
  80. extern struct class nfc_class;
  81. struct nfc_dev *nfc_allocate_device(struct nfc_ops *ops,
  82. u32 supported_protocols,
  83. int tx_headroom,
  84. int tx_tailroom);
  85. /**
  86. * nfc_free_device - free nfc device
  87. *
  88. * @dev: The nfc device to free
  89. */
  90. static inline void nfc_free_device(struct nfc_dev *dev)
  91. {
  92. put_device(&dev->dev);
  93. }
  94. int nfc_register_device(struct nfc_dev *dev);
  95. void nfc_unregister_device(struct nfc_dev *dev);
  96. /**
  97. * nfc_set_parent_dev - set the parent device
  98. *
  99. * @nfc_dev: The nfc device whose parent is being set
  100. * @dev: The parent device
  101. */
  102. static inline void nfc_set_parent_dev(struct nfc_dev *nfc_dev,
  103. struct device *dev)
  104. {
  105. nfc_dev->dev.parent = dev;
  106. }
  107. /**
  108. * nfc_set_drvdata - set driver specifc data
  109. *
  110. * @dev: The nfc device
  111. * @data: Pointer to driver specifc data
  112. */
  113. static inline void nfc_set_drvdata(struct nfc_dev *dev, void *data)
  114. {
  115. dev_set_drvdata(&dev->dev, data);
  116. }
  117. /**
  118. * nfc_get_drvdata - get driver specifc data
  119. *
  120. * @dev: The nfc device
  121. */
  122. static inline void *nfc_get_drvdata(struct nfc_dev *dev)
  123. {
  124. return dev_get_drvdata(&dev->dev);
  125. }
  126. /**
  127. * nfc_device_name - get the nfc device name
  128. *
  129. * @dev: The nfc device whose name to return
  130. */
  131. static inline const char *nfc_device_name(struct nfc_dev *dev)
  132. {
  133. return dev_name(&dev->dev);
  134. }
  135. struct sk_buff *nfc_alloc_skb(unsigned int size, gfp_t gfp);
  136. int nfc_targets_found(struct nfc_dev *dev, struct nfc_target *targets,
  137. int ntargets);
  138. #endif /* __NET_NFC_H */