bus.h 6.2 KB

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  1. /* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
  2. /* Copyright(c) 2015-17 Intel Corporation. */
  3. #ifndef __SDW_BUS_H
  4. #define __SDW_BUS_H
  5. #define DEFAULT_BANK_SWITCH_TIMEOUT 3000
  6. #define DEFAULT_PROBE_TIMEOUT 2000
  7. u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr);
  8. #if IS_ENABLED(CONFIG_ACPI)
  9. int sdw_acpi_find_slaves(struct sdw_bus *bus);
  10. #else
  11. static inline int sdw_acpi_find_slaves(struct sdw_bus *bus)
  12. {
  13. return -ENOTSUPP;
  14. }
  15. #endif
  16. int sdw_of_find_slaves(struct sdw_bus *bus);
  17. void sdw_extract_slave_id(struct sdw_bus *bus,
  18. u64 addr, struct sdw_slave_id *id);
  19. int sdw_slave_add(struct sdw_bus *bus, struct sdw_slave_id *id,
  20. struct fwnode_handle *fwnode);
  21. int sdw_master_device_add(struct sdw_bus *bus, struct device *parent,
  22. struct fwnode_handle *fwnode);
  23. int sdw_master_device_del(struct sdw_bus *bus);
  24. #ifdef CONFIG_DEBUG_FS
  25. void sdw_bus_debugfs_init(struct sdw_bus *bus);
  26. void sdw_bus_debugfs_exit(struct sdw_bus *bus);
  27. void sdw_slave_debugfs_init(struct sdw_slave *slave);
  28. void sdw_slave_debugfs_exit(struct sdw_slave *slave);
  29. void sdw_debugfs_init(void);
  30. void sdw_debugfs_exit(void);
  31. #else
  32. static inline void sdw_bus_debugfs_init(struct sdw_bus *bus) {}
  33. static inline void sdw_bus_debugfs_exit(struct sdw_bus *bus) {}
  34. static inline void sdw_slave_debugfs_init(struct sdw_slave *slave) {}
  35. static inline void sdw_slave_debugfs_exit(struct sdw_slave *slave) {}
  36. static inline void sdw_debugfs_init(void) {}
  37. static inline void sdw_debugfs_exit(void) {}
  38. #endif
  39. enum {
  40. SDW_MSG_FLAG_READ = 0,
  41. SDW_MSG_FLAG_WRITE,
  42. };
  43. /**
  44. * struct sdw_msg - Message structure
  45. * @addr: Register address accessed in the Slave
  46. * @len: number of messages
  47. * @dev_num: Slave device number
  48. * @addr_page1: SCP address page 1 Slave register
  49. * @addr_page2: SCP address page 2 Slave register
  50. * @flags: transfer flags, indicate if xfer is read or write
  51. * @buf: message data buffer
  52. * @ssp_sync: Send message at SSP (Stream Synchronization Point)
  53. * @page: address requires paging
  54. */
  55. struct sdw_msg {
  56. u16 addr;
  57. u16 len;
  58. u8 dev_num;
  59. u8 addr_page1;
  60. u8 addr_page2;
  61. u8 flags;
  62. u8 *buf;
  63. bool ssp_sync;
  64. bool page;
  65. };
  66. #define SDW_DOUBLE_RATE_FACTOR 2
  67. #define SDW_STRM_RATE_GROUPING 1
  68. extern int sdw_rows[SDW_FRAME_ROWS];
  69. extern int sdw_cols[SDW_FRAME_COLS];
  70. int sdw_find_row_index(int row);
  71. int sdw_find_col_index(int col);
  72. /**
  73. * sdw_port_runtime: Runtime port parameters for Master or Slave
  74. *
  75. * @num: Port number. For audio streams, valid port number ranges from
  76. * [1,14]
  77. * @ch_mask: Channel mask
  78. * @transport_params: Transport parameters
  79. * @port_params: Port parameters
  80. * @port_node: List node for Master or Slave port_list
  81. *
  82. * SoundWire spec has no mention of ports for Master interface but the
  83. * concept is logically extended.
  84. */
  85. struct sdw_port_runtime {
  86. int num;
  87. int ch_mask;
  88. struct sdw_transport_params transport_params;
  89. struct sdw_port_params port_params;
  90. struct list_head port_node;
  91. };
  92. /**
  93. * sdw_slave_runtime: Runtime Stream parameters for Slave
  94. *
  95. * @slave: Slave handle
  96. * @direction: Data direction for Slave
  97. * @ch_count: Number of channels handled by the Slave for
  98. * this stream
  99. * @m_rt_node: sdw_master_runtime list node
  100. * @port_list: List of Slave Ports configured for this stream
  101. */
  102. struct sdw_slave_runtime {
  103. struct sdw_slave *slave;
  104. enum sdw_data_direction direction;
  105. unsigned int ch_count;
  106. struct list_head m_rt_node;
  107. struct list_head port_list;
  108. };
  109. /**
  110. * sdw_master_runtime: Runtime stream parameters for Master
  111. *
  112. * @bus: Bus handle
  113. * @stream: Stream runtime handle
  114. * @direction: Data direction for Master
  115. * @ch_count: Number of channels handled by the Master for
  116. * this stream, can be zero.
  117. * @slave_rt_list: Slave runtime list
  118. * @port_list: List of Master Ports configured for this stream, can be zero.
  119. * @stream_node: sdw_stream_runtime master_list node
  120. * @bus_node: sdw_bus m_rt_list node
  121. */
  122. struct sdw_master_runtime {
  123. struct sdw_bus *bus;
  124. struct sdw_stream_runtime *stream;
  125. enum sdw_data_direction direction;
  126. unsigned int ch_count;
  127. struct list_head slave_rt_list;
  128. struct list_head port_list;
  129. struct list_head stream_node;
  130. struct list_head bus_node;
  131. };
  132. struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
  133. enum sdw_data_direction direction,
  134. unsigned int port_num);
  135. int sdw_configure_dpn_intr(struct sdw_slave *slave, int port,
  136. bool enable, int mask);
  137. int sdw_transfer(struct sdw_bus *bus, struct sdw_msg *msg);
  138. int sdw_transfer_defer(struct sdw_bus *bus, struct sdw_msg *msg,
  139. struct sdw_defer *defer);
  140. #define SDW_READ_INTR_CLEAR_RETRY 10
  141. int sdw_fill_msg(struct sdw_msg *msg, struct sdw_slave *slave,
  142. u32 addr, size_t count, u16 dev_num, u8 flags, u8 *buf);
  143. /* Retrieve and return channel count from channel mask */
  144. static inline int sdw_ch_mask_to_ch(int ch_mask)
  145. {
  146. int c = 0;
  147. for (c = 0; ch_mask; ch_mask >>= 1)
  148. c += ch_mask & 1;
  149. return c;
  150. }
  151. /* Fill transport parameter data structure */
  152. static inline void sdw_fill_xport_params(struct sdw_transport_params *params,
  153. int port_num, bool grp_ctrl_valid,
  154. int grp_ctrl, int sample_int,
  155. int off1, int off2,
  156. int hstart, int hstop,
  157. int pack_mode, int lane_ctrl)
  158. {
  159. params->port_num = port_num;
  160. params->blk_grp_ctrl_valid = grp_ctrl_valid;
  161. params->blk_grp_ctrl = grp_ctrl;
  162. params->sample_interval = sample_int;
  163. params->offset1 = off1;
  164. params->offset2 = off2;
  165. params->hstart = hstart;
  166. params->hstop = hstop;
  167. params->blk_pkg_mode = pack_mode;
  168. params->lane_ctrl = lane_ctrl;
  169. }
  170. /* Fill port parameter data structure */
  171. static inline void sdw_fill_port_params(struct sdw_port_params *params,
  172. int port_num, int bps,
  173. int flow_mode, int data_mode)
  174. {
  175. params->num = port_num;
  176. params->bps = bps;
  177. params->flow_mode = flow_mode;
  178. params->data_mode = data_mode;
  179. }
  180. /* broadcast read/write for tests */
  181. int sdw_bread_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr);
  182. int sdw_bwrite_no_pm_unlocked(struct sdw_bus *bus, u16 dev_num, u32 addr, u8 value);
  183. /*
  184. * At the moment we only track Master-initiated hw_reset.
  185. * Additional fields can be added as needed
  186. */
  187. #define SDW_UNATTACH_REQUEST_MASTER_RESET BIT(0)
  188. void sdw_clear_slave_status(struct sdw_bus *bus, u32 request);
  189. int sdw_slave_modalias(const struct sdw_slave *slave, char *buf, size_t size);
  190. #endif /* __SDW_BUS_H */