1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "main.c" 39 40 // ***************************************************************************** 41 // 42 // Port for Rasperry Pi with built-in BCM chipset via H4 or H5 43 // 44 // ***************************************************************************** 45 46 #include <errno.h> 47 #include <fcntl.h> 48 #include <inttypes.h> 49 #include <signal.h> 50 #include <stdint.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <sys/stat.h> 55 #include <termios.h> 56 #include <unistd.h> 57 58 #include "btstack_config.h" 59 60 #include "btstack_debug.h" 61 #include "btstack_event.h" 62 #include "btstack_link_key_db_fs.h" 63 #include "btstack_memory.h" 64 #include "btstack_run_loop.h" 65 #include "btstack_run_loop_posix.h" 66 #include "bluetooth_company_id.h" 67 #include "hci.h" 68 #include "hci_dump.h" 69 #include "btstack_stdin.h" 70 #include "btstack_tlv_posix.h" 71 72 #include "btstack_chipset_bcm.h" 73 #include "btstack_chipset_bcm_download_firmware.h" 74 #include "btstack_control_raspi.h" 75 76 #include "raspi_get_model.h" 77 78 int btstack_main(int argc, const char * argv[]); 79 80 typedef enum { 81 UART_INVALID, 82 UART_SOFTWARE_NO_FLOW, 83 UART_HARDWARE_NO_FLOW, 84 UART_HARDWARE_FLOW 85 } uart_type_t; 86 87 // default config, updated depending on RasperryPi UART configuration 88 static hci_transport_config_uart_t transport_config = { 89 HCI_TRANSPORT_CONFIG_UART, 90 115200, 91 0, // main baudrate 92 0, // flow control 93 NULL, 94 }; 95 96 static btstack_uart_config_t uart_config; 97 98 static int main_argc; 99 static const char ** main_argv; 100 101 static btstack_packet_callback_registration_t hci_event_callback_registration; 102 103 #define TLV_DB_PATH_PREFIX "/tmp/btstack_" 104 #define TLV_DB_PATH_POSTFIX ".tlv" 105 static char tlv_db_path[100]; 106 static const btstack_tlv_t * tlv_impl; 107 static btstack_tlv_posix_t tlv_context; 108 109 110 static int raspi_speed_to_baud(speed_t baud) 111 { 112 switch (baud) { 113 case B9600: 114 return 9600; 115 case B19200: 116 return 19200; 117 case B38400: 118 return 38400; 119 case B57600: 120 return 57600; 121 case B115200: 122 return 115200; 123 case B230400: 124 return 230400; 125 case B460800: 126 return 460800; 127 case B500000: 128 return 500000; 129 case B576000: 130 return 576000; 131 case B921600: 132 return 921600; 133 case B1000000: 134 return 1000000; 135 case B1152000: 136 return 1152000; 137 case B1500000: 138 return 1500000; 139 case B2000000: 140 return 2000000; 141 case B2500000: 142 return 2500000; 143 case B3000000: 144 return 3000000; 145 case B3500000: 146 return 3500000; 147 case B4000000: 148 return 4000000; 149 default: 150 return -1; 151 } 152 } 153 154 static void raspi_get_terminal_params( hci_transport_config_uart_t *tc ) 155 { 156 // open serial terminal and get parameters 157 int fd = open( tc->device_name, O_RDONLY ); 158 if( fd < 0 ) 159 { 160 perror( "can't open serial port" ); 161 return; 162 } 163 struct termios tios; 164 tcgetattr( fd, &tios ); 165 close( fd ); 166 167 speed_t ospeed = cfgetospeed( &tios ); 168 int baud = raspi_speed_to_baud( ospeed ); 169 printf( "current serial terminal parameter baudrate: %d, flow control: %s\n", baud, (tios.c_cflag&CRTSCTS)?"Hardware":"None" ); 170 171 // overwrites the initial baudrate only in case it was likely to be altered before 172 if( baud > 9600 ) 173 { 174 tc->baudrate_init = baud; 175 tc->flowcontrol = (tios.c_cflag & CRTSCTS)?1:0; 176 } 177 } 178 179 static void sigint_handler(int param){ 180 UNUSED(param); 181 182 printf("CTRL-C - SIGINT received, shutting down..\n"); 183 log_info("sigint_handler: shutting down"); 184 185 // reset anyway 186 btstack_stdin_reset(); 187 188 // power down 189 hci_power_control(HCI_POWER_OFF); 190 hci_close(); 191 log_info("Good bye, see you.\n"); 192 exit(0); 193 } 194 195 static int led_state = 0; 196 void hal_led_toggle(void){ 197 led_state = 1 - led_state; 198 printf("LED State %u\n", led_state); 199 } 200 201 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 202 bd_addr_t addr; 203 if (packet_type != HCI_EVENT_PACKET) return; 204 switch (hci_event_packet_get_type(packet)){ 205 case BTSTACK_EVENT_STATE: 206 if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) break; 207 gap_local_bd_addr(addr); 208 printf("BTstack up and running at %s\n", bd_addr_to_str(addr)); 209 // setup TLV 210 strcpy(tlv_db_path, TLV_DB_PATH_PREFIX); 211 strcat(tlv_db_path, bd_addr_to_str(addr)); 212 strcat(tlv_db_path, TLV_DB_PATH_POSTFIX); 213 tlv_impl = btstack_tlv_posix_init_instance(&tlv_context, tlv_db_path); 214 btstack_tlv_set_instance(tlv_impl, &tlv_context); 215 break; 216 case HCI_EVENT_COMMAND_COMPLETE: 217 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 218 if (hci_event_command_complete_get_return_parameters(packet)[0]) break; 219 // terminate, name 248 chars 220 packet[6+248] = 0; 221 printf("Local name: %s\n", &packet[6]); 222 223 btstack_chipset_bcm_set_device_name((const char *)&packet[6]); 224 } 225 break; 226 default: 227 break; 228 } 229 } 230 231 // see https://github.com/RPi-Distro/pi-bluetooth/blob/master/usr/bin/btuart 232 static int raspi_get_bd_addr(bd_addr_t addr){ 233 234 FILE *fd = fopen( "/proc/device-tree/serial-number", "r" ); 235 if( fd == NULL ){ 236 fprintf(stderr, "can't read serial number, %s\n", strerror( errno ) ); 237 return -1; 238 } 239 fscanf( fd, "%*08x" "%*02x" "%02" SCNx8 "%02" SCNx8 "%02" SCNx8, &addr[3], &addr[4], &addr[5] ); 240 fclose( fd ); 241 242 addr[0] = 0xb8; addr[1] = 0x27; addr[2] = 0xeb; 243 addr[3] ^= 0xaa; addr[4] ^= 0xaa; addr[5] ^= 0xaa; 244 245 return 0; 246 } 247 248 // see https://github.com/RPi-Distro/pi-bluetooth/blob/master/usr/bin/btuart 249 // on UART_INVALID errno is set 250 static uart_type_t raspi_get_bluetooth_uart_type(void){ 251 252 uint8_t deviceUart0[21] = { 0 }; 253 FILE *fd = fopen( "/proc/device-tree/aliases/uart0", "r" ); 254 if( fd == NULL ) return UART_INVALID; 255 fscanf( fd, "%20s", deviceUart0 ); 256 fclose( fd ); 257 258 uint8_t deviceSerial1[21] = { 0 }; 259 fd = fopen( "/proc/device-tree/aliases/serial1", "r" ); 260 if( fd == NULL ) return UART_INVALID; 261 fscanf( fd, "%20s", deviceSerial1 ); 262 fclose( fd ); 263 264 // test if uart0 is an alias for serial1 265 if( strncmp( (const char *) deviceUart0, (const char *) deviceSerial1, 21 ) == 0 ){ 266 // HW uart 267 size_t count = 0; 268 uint8_t buf[16]; 269 fd = fopen( "/proc/device-tree/soc/gpio@7e200000/uart0_pins/brcm,pins", "r" ); 270 if( fd == NULL ) return UART_INVALID; 271 count = fread( buf, 1, 16, fd ); 272 fclose( fd ); 273 274 // contains assigned pins 275 int pins = count / 4; 276 if( pins == 4 ){ 277 return UART_HARDWARE_FLOW; 278 } else { 279 return UART_HARDWARE_NO_FLOW; 280 } 281 } else { 282 return UART_SOFTWARE_NO_FLOW; 283 } 284 } 285 286 static void phase2(int status); 287 int main(int argc, const char * argv[]){ 288 289 /// GET STARTED with BTstack /// 290 btstack_memory_init(); 291 292 // use logger: format HCI_DUMP_PACKETLOGGER, HCI_DUMP_BLUEZ or HCI_DUMP_STDOUT 293 const char * pklg_path = "/tmp/hci_dump.pklg"; 294 hci_dump_open(pklg_path, HCI_DUMP_PACKETLOGGER); 295 printf("Packet Log: %s\n", pklg_path); 296 297 // setup run loop 298 btstack_run_loop_init(btstack_run_loop_posix_get_instance()); 299 300 // pick serial port and configure uart block driver 301 transport_config.device_name = "/dev/serial1"; 302 303 // derive bd_addr from serial number 304 bd_addr_t addr = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 }; 305 raspi_get_bd_addr(addr); 306 307 // set UART config based on raspi Bluetooth UART type 308 int bt_reg_en_pin = -1; 309 switch (raspi_get_bluetooth_uart_type()){ 310 case UART_INVALID: 311 fprintf(stderr, "can't verify HW uart, %s\n", strerror( errno ) ); 312 return -1; 313 case UART_SOFTWARE_NO_FLOW: 314 // ?? 315 bt_reg_en_pin = 128; 316 transport_config.baudrate_main = 460800; 317 transport_config.flowcontrol = 0; 318 break; 319 case UART_HARDWARE_NO_FLOW: 320 // Raspberry Pi 3 A 321 // Raspberry Pi 3 B 322 bt_reg_en_pin = 128; 323 transport_config.baudrate_main = 921600; 324 transport_config.flowcontrol = 0; 325 break; 326 case UART_HARDWARE_FLOW: 327 // Raspberry Pi Zero W gpio 45 328 // Raspberry Pi 3A+ vgpio 129 but WLAN + BL 329 // Raspberry Pi 3B+ vgpio 129 but WLAN + BL 330 transport_config.baudrate_main = 3000000; 331 transport_config.flowcontrol = 1; 332 333 // 3 mbps does not work on Zero W (investigation pending) 334 if (raspi_get_model() == MODEL_ZERO_W){ 335 transport_config.baudrate_main = 921600; 336 } 337 break; 338 } 339 printf("%s, %u, BT_REG_EN at GPIO %u\n", transport_config.flowcontrol ? "H4":"H5", transport_config.baudrate_main, bt_reg_en_pin); 340 341 // get BCM chipset driver 342 const btstack_chipset_t * chipset = btstack_chipset_bcm_instance(); 343 chipset->init(&transport_config); 344 345 // set path to firmware files 346 btstack_chipset_bcm_set_hcd_folder_path("/lib/firmware/brcm"); 347 348 // setup UART driver 349 const btstack_uart_block_t * uart_driver = btstack_uart_block_posix_instance(); 350 351 // extract UART config from transport config 352 uart_config.baudrate = transport_config.baudrate_init; 353 uart_config.flowcontrol = transport_config.flowcontrol; 354 uart_config.device_name = transport_config.device_name; 355 uart_driver->init(&uart_config); 356 357 // HW with FlowControl -> we can use regular h4 mode 358 const hci_transport_t * transport; 359 if (transport_config.flowcontrol){ 360 transport = hci_transport_h4_instance(uart_driver); 361 } else { 362 transport = hci_transport_h5_instance(uart_driver); 363 } 364 365 // setup HCI (to be able to use bcm chipset driver) 366 const btstack_link_key_db_t * link_key_db = btstack_link_key_db_fs_instance(); 367 hci_init(transport, (void*) &transport_config); 368 hci_set_bd_addr( addr ); 369 hci_set_chipset(btstack_chipset_bcm_instance()); 370 hci_set_link_key_db(link_key_db); 371 372 // inform about BTstack state 373 hci_event_callback_registration.callback = &packet_handler; 374 hci_add_event_handler(&hci_event_callback_registration); 375 376 // handle CTRL-c 377 signal(SIGINT, sigint_handler); 378 379 main_argc = argc; 380 main_argv = argv; 381 382 if (transport_config.flowcontrol){ 383 384 // re-use current terminal speed 385 raspi_get_terminal_params( &transport_config ); 386 387 // with flowcontrol, we use h4 and are done 388 btstack_main(main_argc, main_argv); 389 390 } else { 391 392 // power cycle Bluetooth controller on older models without flowcontrol 393 printf("Power Cycle Controller\n"); 394 btstack_control_raspi_set_bt_reg_en_pin(bt_reg_en_pin); 395 btstack_control_t *control = btstack_control_raspi_get_instance(); 396 control->init(NULL); 397 control->off(); 398 usleep( 100000 ); 399 control->on(); 400 401 // assume BCM4343W used in Pi 3 A/B. Pi 3 A/B+ have a newer controller but support H4 with Flowcontrol 402 btstack_chipset_bcm_set_device_name("BCM43430A1"); 403 404 // phase #1 download firmware 405 printf("Phase 1: Download firmware\n"); 406 407 // phase #2 start main app 408 btstack_chipset_bcm_download_firmware(uart_driver, transport_config.baudrate_main, &phase2); 409 } 410 411 // go 412 btstack_run_loop_execute(); 413 return 0; 414 } 415 416 static void phase2(int status){ 417 418 if (status){ 419 printf("Download firmware failed\n"); 420 return; 421 } 422 423 printf("Phase 2: Main app\n"); 424 425 // setup app 426 btstack_main(main_argc, main_argv); 427 } 428 429