1 /* 2 * hci.h 3 * 4 * Created by Matthias Ringwald on 4/29/09. 5 * 6 */ 7 8 #pragma once 9 10 #include <stdint.h> 11 #include <stdlib.h> 12 13 #include "hci_transport.h" 14 #include "bt_control.h" 15 16 // helper for BT little endian format 17 #define READ_BT_16( buffer, pos) (buffer[pos] | (buffer[pos+1] << 8)) 18 #define READ_BT_24( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16)) 19 #define READ_BT_32( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16) | (((uint32_t) buffer[pos+3])) << 24) 20 21 // packet header lengh 22 #define HCI_CMD_DATA_PKT_HDR 0x03 23 #define HCI_ACL_DATA_PKT_HDR 0x04 24 #define HCI_SCO_DATA_PKT_HDR 0x03 25 #define HCI_EVENT_PKT_HDR 0x02 26 27 // Events from host controller to host 28 #define HCI_EVENT_INQUIRY_COMPLETE 0x01 29 #define HCI_EVENT_INQUIRY_RESULT 0x02 30 #define HCI_EVENT_CONNECTION_COMPLETE 0x03 31 #define HCI_EVENT_CONNECTION_REQUEST 0x04 32 #define HCI_EVENT_DISCONNECTION_COMPLETE 0x05 33 #define HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT 0x06 34 #define HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 0x07 35 #define HCI_EVENT_ENCRIPTION_CHANGE 0x08 36 #define HCI_EVENT_CHANGE_CONNECTION_LINK_KEY_COMPLETE 0x09 37 #define HCI_EVENT_MASTER_LINK_KEY_COMPLETE 0x0A 38 #define HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE 0x0B 39 #define HCI_EVENT_READ_REMOTE_VERSION_INFORMATION_COMPLETE 0x0C 40 #define HCI_EVENT_QOS_SETUP_COMPLETE 0x0D 41 #define HCI_EVENT_COMMAND_COMPLETE 0x0E 42 #define HCI_EVENT_COMMAND_STATUS 0x0F 43 #define HCI_EVENT_HARDWARE_ERROR 0x10 44 #define HCI_EVENT_FLUSH_OCCURED 0x11 45 #define HCI_EVENT_ROLE_CHANGE 0x12 46 #define HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS 0x13 47 #define HCI_EVENT_MODE_CHANGE_EVENT 0x14 48 #define HCI_EVENT_RETURN_LINK_KEYS 0x15 49 #define HCI_EVENT_PIN_CODE_REQUEST 0x16 50 #define HCI_EVENT_LINK_KEY_REQUEST 0x17 51 #define HCI_EVENT_LINK_KEY_NOTIFICATION 0x18 52 #define HCI_EVENT_DATA_BUFFER_OVERFLOW 0x1A 53 #define HCI_EVENT_MAX_SLOTS_CHANGED 0x1B 54 #define HCI_EVENT_READ_CLOCK_OFFSET_COMPLETE 0x1C 55 #define NECTEVENT_ION_PACKET_TYPE_CHANGED 0x1D 56 #define HCI_EVENT_INQUIRY_RESULT_WITH_RSSI 0x22 57 #define HCI_EVENT_VENDOR_SPECIFIC 0xFF 58 59 // events from BTstack for application/client lib 60 #define BTSTACK_EVENT_HCI_WORKING 0x80 61 62 #define COMMAND_COMPLETE_EVENT(event,cmd) ( event[0] == HCI_EVENT_COMMAND_COMPLETE && READ_BT_16(event,3) == cmd.opcode) 63 64 65 /** 66 * Default INQ Mode 67 */ 68 #define HCI_INQUIRY_LAP 0x9E8B33L // 0x9E8B33: General/Unlimited Inquiry Access Code (GIAC) 69 70 /** 71 * @brief Length of a bluetooth device address. 72 */ 73 #define BD_ADDR_LEN 6 74 typedef uint8_t bd_addr_t[BD_ADDR_LEN]; 75 76 /** 77 * @brief The link key type 78 */ 79 #define LINK_KEY_LEN 16 80 typedef uint8_t link_key_t[LINK_KEY_LEN]; 81 82 /** 83 * @brief hci connection handle type 84 */ 85 typedef uint16_t hci_con_handle_t; 86 87 typedef enum { 88 HCI_POWER_OFF = 0, 89 HCI_POWER_ON 90 } HCI_POWER_MODE; 91 92 typedef enum { 93 HCI_STATE_OFF = 0, 94 HCI_STATE_INITIALIZING, 95 HCI_STATE_WORKING, 96 HCI_STATE_HALTING 97 } HCI_STATE; 98 99 typedef struct { 100 uint16_t opcode; 101 const char *format; 102 } hci_cmd_t; 103 104 typedef enum { 105 SEND_NEGATIVE_LINK_KEY_REQUEST = 1 << 0, 106 SEND_PIN_CODE_RESPONSE = 1 << 1 107 } hci_connection_flags_t; 108 109 typedef struct hci_connection { 110 // linked list 111 struct hci_connection * next; 112 113 // remote side 114 bd_addr_t address; 115 hci_con_handle_t con_handle; 116 117 // hci state machine 118 hci_connection_flags_t flags; 119 120 } hci_connection_t; 121 122 123 typedef struct { 124 125 hci_transport_t * hci_transport; 126 bt_control_t * control; 127 void * config; 128 129 uint8_t * hci_cmd_buffer; 130 hci_connection_t * connections; 131 132 /* host to controller flow control */ 133 uint8_t num_cmd_packets; 134 uint8_t num_acl_packets; 135 136 /* callback to L2CAP layer */ 137 void (*event_packet_handler)(uint8_t *packet, int size); 138 void (*acl_packet_handler) (uint8_t *packet, int size); 139 140 /* hci state machine */ 141 HCI_STATE state; 142 uint8_t substate; 143 uint8_t cmds_ready; 144 145 } hci_stack_t; 146 147 148 // set up HCI 149 void hci_init(hci_transport_t *transport, void *config, bt_control_t *control); 150 151 void hci_register_event_packet_handler(void (*handler)(uint8_t *packet, int size)); 152 153 void hci_register_acl_packet_handler (void (*handler)(uint8_t *packet, int size)); 154 155 // power control 156 int hci_power_control(HCI_POWER_MODE mode); 157 158 /** 159 * run the hci daemon loop once 160 * 161 * @return 0 or next timeout 162 */ 163 uint32_t hci_run(); 164 165 // 166 void hexdump(void *data, int size); 167 168 // create and send hci command packet based on a template and a list of parameters 169 int hci_send_cmd(hci_cmd_t *cmd, ...); 170 171 // send ACL packet 172 int hci_send_acl_packet(uint8_t *packet, int size); 173 174 // helper 175 extern void bt_store_16(uint8_t *buffer, uint16_t pos, uint16_t value); 176 extern void bt_store_32(uint8_t *buffer, uint16_t pos, uint32_t value); 177 extern void bt_flip_addr(bd_addr_t dest, bd_addr_t src); 178 179 // HCI Commands - see hci.c for info on parameters 180 extern hci_cmd_t hci_inquiry; 181 extern hci_cmd_t hci_inquiry_cancel; 182 extern hci_cmd_t hci_link_key_request_negative_reply; 183 extern hci_cmd_t hci_pin_code_request_reply; 184 extern hci_cmd_t hci_reset; 185 extern hci_cmd_t hci_create_connection; 186 extern hci_cmd_t hci_host_buffer_size; 187 extern hci_cmd_t hci_write_authentication_enable; 188 extern hci_cmd_t hci_write_page_timeout; 189 extern hci_cmd_t hci_remote_name_request; 190 extern hci_cmd_t hci_remote_name_request_cancel; 191 extern hci_cmd_t hci_read_bd_addr; 192 193