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 "ble/le_device_db_tlv.h" 63 #include "classic/btstack_link_key_db_tlv.h" 64 #include "btstack_memory.h" 65 #include "btstack_run_loop.h" 66 #include "btstack_run_loop_posix.h" 67 #include "bluetooth_company_id.h" 68 #include "hci.h" 69 #include "hci_dump.h" 70 #include "hci_dump_posix_fs.h" 71 #include "hci_transport.h" 72 #include "hci_transport_h4.h" 73 #include "hci_transport_h5.h" 74 #include "btstack_stdin.h" 75 #include "btstack_tlv_posix.h" 76 #include "btstack_uart.h" 77 #include "btstack_uart_block.h" 78 #include "btstack_uart_slip_wrapper.h" 79 80 #include "btstack_chipset_bcm.h" 81 #include "btstack_chipset_bcm_download_firmware.h" 82 #include "btstack_control_raspi.h" 83 84 85 #include "raspi_get_model.h" 86 87 int btstack_main(int argc, const char * argv[]); 88 89 typedef enum { 90 UART_INVALID, 91 UART_SOFTWARE_NO_FLOW, 92 UART_HARDWARE_NO_FLOW, 93 UART_HARDWARE_FLOW 94 } uart_type_t; 95 96 // default config, updated depending on RasperryPi UART configuration 97 static hci_transport_config_uart_t transport_config = { 98 HCI_TRANSPORT_CONFIG_UART, 99 115200, 100 0, // main baudrate 101 0, // flow control 102 NULL, 103 }; 104 105 static btstack_uart_config_t uart_config; 106 107 static int main_argc; 108 static const char ** main_argv; 109 110 static btstack_packet_callback_registration_t hci_event_callback_registration; 111 112 #define TLV_DB_PATH_PREFIX "/tmp/btstack_" 113 #define TLV_DB_PATH_POSTFIX ".tlv" 114 static char tlv_db_path[100]; 115 static const btstack_tlv_t * tlv_impl; 116 static btstack_tlv_posix_t tlv_context; 117 118 119 static int raspi_speed_to_baud(speed_t baud) 120 { 121 switch (baud) { 122 case B9600: 123 return 9600; 124 case B19200: 125 return 19200; 126 case B38400: 127 return 38400; 128 case B57600: 129 return 57600; 130 case B115200: 131 return 115200; 132 case B230400: 133 return 230400; 134 case B460800: 135 return 460800; 136 case B500000: 137 return 500000; 138 case B576000: 139 return 576000; 140 case B921600: 141 return 921600; 142 case B1000000: 143 return 1000000; 144 case B1152000: 145 return 1152000; 146 case B1500000: 147 return 1500000; 148 case B2000000: 149 return 2000000; 150 case B2500000: 151 return 2500000; 152 case B3000000: 153 return 3000000; 154 case B3500000: 155 return 3500000; 156 case B4000000: 157 return 4000000; 158 default: 159 return -1; 160 } 161 } 162 163 static void raspi_get_terminal_params( hci_transport_config_uart_t *tc ) 164 { 165 // open serial terminal and get parameters 166 int fd = open( tc->device_name, O_RDONLY ); 167 if( fd < 0 ) 168 { 169 perror( "can't open serial port" ); 170 return; 171 } 172 struct termios tios; 173 tcgetattr( fd, &tios ); 174 close( fd ); 175 176 speed_t ospeed = cfgetospeed( &tios ); 177 int baud = raspi_speed_to_baud( ospeed ); 178 printf( "current serial terminal parameter baudrate: %d, flow control: %s\n", baud, (tios.c_cflag&CRTSCTS)?"Hardware":"None" ); 179 180 // overwrites the initial baudrate only in case it was likely to be altered before 181 if( baud > 9600 ) 182 { 183 tc->baudrate_init = baud; 184 tc->flowcontrol = (tios.c_cflag & CRTSCTS)?1:0; 185 } 186 } 187 188 static void sigint_handler(int param){ 189 UNUSED(param); 190 191 printf("CTRL-C - SIGINT received, shutting down..\n"); 192 log_info("sigint_handler: shutting down"); 193 194 // reset anyway 195 btstack_stdin_reset(); 196 197 // power down 198 hci_power_control(HCI_POWER_OFF); 199 hci_close(); 200 log_info("Good bye, see you.\n"); 201 exit(0); 202 } 203 204 static int led_state = 0; 205 void hal_led_toggle(void){ 206 led_state = 1 - led_state; 207 printf("LED State %u\n", led_state); 208 } 209 210 static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 211 bd_addr_t addr; 212 if (packet_type != HCI_EVENT_PACKET) return; 213 switch (hci_event_packet_get_type(packet)){ 214 case BTSTACK_EVENT_STATE: 215 if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) break; 216 gap_local_bd_addr(addr); 217 printf("BTstack up and running at %s\n", bd_addr_to_str(addr)); 218 // setup TLV 219 strcpy(tlv_db_path, TLV_DB_PATH_PREFIX); 220 strcat(tlv_db_path, bd_addr_to_str(addr)); 221 strcat(tlv_db_path, TLV_DB_PATH_POSTFIX); 222 tlv_impl = btstack_tlv_posix_init_instance(&tlv_context, tlv_db_path); 223 btstack_tlv_set_instance(tlv_impl, &tlv_context); 224 #ifdef ENABLE_CLASSIC 225 hci_set_link_key_db(btstack_link_key_db_tlv_get_instance(tlv_impl, &tlv_context)); 226 #endif 227 #ifdef ENABLE_BLE 228 le_device_db_tlv_configure(tlv_impl, &tlv_context); 229 #endif 230 break; 231 case HCI_EVENT_COMMAND_COMPLETE: 232 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 233 if (hci_event_command_complete_get_return_parameters(packet)[0]) break; 234 // terminate, name 248 chars 235 packet[6+248] = 0; 236 printf("Local name: %s\n", &packet[6]); 237 238 btstack_chipset_bcm_set_device_name((const char *)&packet[6]); 239 } 240 break; 241 default: 242 break; 243 } 244 } 245 246 // see https://github.com/RPi-Distro/pi-bluetooth/blob/master/usr/bin/btuart 247 static int raspi_get_bd_addr(bd_addr_t addr){ 248 249 FILE *fd = fopen( "/proc/device-tree/serial-number", "r" ); 250 if( fd == NULL ){ 251 fprintf(stderr, "can't read serial number, %s\n", strerror( errno ) ); 252 return -1; 253 } 254 fscanf( fd, "%*08x" "%*02x" "%02" SCNx8 "%02" SCNx8 "%02" SCNx8, &addr[3], &addr[4], &addr[5] ); 255 fclose( fd ); 256 257 addr[0] = 0xb8; addr[1] = 0x27; addr[2] = 0xeb; 258 addr[3] ^= 0xaa; addr[4] ^= 0xaa; addr[5] ^= 0xaa; 259 260 return 0; 261 } 262 263 // see https://github.com/RPi-Distro/pi-bluetooth/blob/master/usr/bin/btuart 264 // on UART_INVALID errno is set 265 static uart_type_t raspi_get_bluetooth_uart_type(void){ 266 267 uint8_t deviceUart0[21] = { 0 }; 268 FILE *fd = fopen( "/proc/device-tree/aliases/uart0", "r" ); 269 if( fd == NULL ) return UART_INVALID; 270 fscanf( fd, "%20s", deviceUart0 ); 271 fclose( fd ); 272 273 uint8_t deviceSerial1[21] = { 0 }; 274 fd = fopen( "/proc/device-tree/aliases/serial1", "r" ); 275 if( fd == NULL ) return UART_INVALID; 276 fscanf( fd, "%20s", deviceSerial1 ); 277 fclose( fd ); 278 279 // test if uart0 is an alias for serial1 280 if( strncmp( (const char *) deviceUart0, (const char *) deviceSerial1, 21 ) == 0 ){ 281 // HW uart 282 size_t count = 0; 283 uint8_t buf[16]; 284 fd = fopen( "/proc/device-tree/soc/gpio@7e200000/uart0_pins/brcm,pins", "r" ); 285 if( fd == NULL ) return UART_INVALID; 286 count = fread( buf, 1, 16, fd ); 287 fclose( fd ); 288 289 // contains assigned pins 290 int pins = count / 4; 291 if( pins == 4 ){ 292 return UART_HARDWARE_FLOW; 293 } else { 294 return UART_HARDWARE_NO_FLOW; 295 } 296 } else { 297 return UART_SOFTWARE_NO_FLOW; 298 } 299 } 300 301 static void phase2(int status); 302 int main(int argc, const char * argv[]){ 303 304 /// GET STARTED with BTstack /// 305 btstack_memory_init(); 306 307 // log into file using HCI_DUMP_PACKETLOGGER format 308 const char * pklg_path = "/tmp/hci_dump.pklg"; 309 hci_dump_posix_fs_open(pklg_path, HCI_DUMP_PACKETLOGGER); 310 const hci_dump_t * hci_dump_impl = hci_dump_posix_fs_get_instance(); 311 hci_dump_init(hci_dump_impl); 312 printf("Packet Log: %s\n", pklg_path); 313 314 // setup run loop 315 btstack_run_loop_init(btstack_run_loop_posix_get_instance()); 316 317 // pick serial port and configure uart block driver 318 transport_config.device_name = "/dev/serial1"; 319 320 // derive bd_addr from serial number 321 bd_addr_t addr = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 }; 322 raspi_get_bd_addr(addr); 323 324 // set UART config based on raspi Bluetooth UART type 325 int bt_reg_en_pin = -1; 326 bool power_cycle = true; 327 switch (raspi_get_bluetooth_uart_type()){ 328 case UART_INVALID: 329 fprintf(stderr, "can't verify HW uart, %s\n", strerror( errno ) ); 330 return -1; 331 case UART_SOFTWARE_NO_FLOW: 332 // ?? 333 bt_reg_en_pin = 128; 334 transport_config.baudrate_main = 460800; 335 transport_config.flowcontrol = 0; 336 break; 337 case UART_HARDWARE_NO_FLOW: 338 // Raspberry Pi 3 A 339 // Raspberry Pi 3 B 340 // power up with H5 and without power cycle untested/unsupported 341 bt_reg_en_pin = 128; 342 transport_config.baudrate_main = 921600; 343 transport_config.flowcontrol = 0; 344 break; 345 case UART_HARDWARE_FLOW: 346 // Raspberry Pi Zero W gpio 45, 3 mbps does not work (investigation pending) 347 // Raspberry Pi 3A+ vgpio 129 but WLAN + BL 348 // Raspberry Pi 3B+ vgpio 129 but WLAN + BL 349 transport_config.flowcontrol = 1; 350 int model = raspi_get_model(); 351 if (model == MODEL_ZERO_W){ 352 bt_reg_en_pin = 45; 353 transport_config.baudrate_main = 921600; 354 } else { 355 bt_reg_en_pin = 129; 356 transport_config.baudrate_main = 3000000; 357 } 358 359 #ifdef ENABLE_CONTROLLER_WARM_BOOT 360 power_cycle = false; 361 #else 362 // warn about power cycle on devices with shared reg_en pins 363 if (model == MODEL_3APLUS || model == MODEL_3BPLUS){ 364 printf("Wifi and Bluetooth share a single RESET line and BTstack needs to reset Bluetooth -> SSH over Wifi will fail\n"); 365 printf("Please add ENABLE_CONTROLLER_WARM_BOOT to btstack_config.h to enable startup without RESET\n"); 366 } 367 #endif 368 break; 369 } 370 printf("%s, %u, BT_REG_EN at GPIO %u, %s\n", transport_config.flowcontrol ? "H4":"H5", transport_config.baudrate_main, bt_reg_en_pin, power_cycle ? "Reset Controller" : "Warm Boot"); 371 372 // get BCM chipset driver 373 const btstack_chipset_t * chipset = btstack_chipset_bcm_instance(); 374 chipset->init(&transport_config); 375 376 // set path to firmware files 377 btstack_chipset_bcm_set_hcd_folder_path("/lib/firmware/brcm"); 378 379 // setup UART driver 380 const btstack_uart_t * uart_driver = btstack_uart_posix_instance(); 381 382 // extract UART config from transport config 383 uart_config.baudrate = transport_config.baudrate_init; 384 uart_config.flowcontrol = transport_config.flowcontrol; 385 uart_config.device_name = transport_config.device_name; 386 uart_driver->init(&uart_config); 387 388 // HW with FlowControl -> we can use regular h4 mode 389 const hci_transport_t * transport; 390 if (transport_config.flowcontrol){ 391 transport = hci_transport_h4_instance(uart_driver); 392 } else { 393 transport = hci_transport_h5_instance(uart_driver); 394 } 395 396 // setup HCI (to be able to use bcm chipset driver) 397 hci_init(transport, (void*) &transport_config); 398 hci_set_bd_addr( addr ); 399 hci_set_chipset(btstack_chipset_bcm_instance()); 400 401 // inform about BTstack state 402 hci_event_callback_registration.callback = &packet_handler; 403 hci_add_event_handler(&hci_event_callback_registration); 404 405 // handle CTRL-c 406 signal(SIGINT, sigint_handler); 407 408 main_argc = argc; 409 main_argv = argv; 410 411 // power cycle Bluetooth controller on older models without flowcontrol 412 if (power_cycle){ 413 btstack_control_raspi_set_bt_reg_en_pin(bt_reg_en_pin); 414 btstack_control_t *control = btstack_control_raspi_get_instance(); 415 control->init(NULL); 416 control->off(); 417 usleep( 100000 ); 418 control->on(); 419 } 420 421 if (transport_config.flowcontrol){ 422 423 // re-use current terminal speed (if there was no power cycle) 424 if (!power_cycle){ 425 raspi_get_terminal_params( &transport_config ); 426 } 427 428 // with flowcontrol, we use h4 and are done 429 btstack_main(main_argc, main_argv); 430 431 } else { 432 433 // assume BCM4343W used in Pi 3 A/B. Pi 3 A/B+ have a newer controller but support H4 with Flowcontrol 434 btstack_chipset_bcm_set_device_name("BCM43430A1"); 435 436 // phase #1 download firmware 437 printf("Phase 1: Download firmware\n"); 438 439 // phase #2 start main app 440 btstack_chipset_bcm_download_firmware(uart_driver, transport_config.baudrate_main, &phase2); 441 } 442 443 // go 444 btstack_run_loop_execute(); 445 return 0; 446 } 447 448 static void phase2(int status){ 449 450 if (status){ 451 printf("Download firmware failed\n"); 452 return; 453 } 454 455 printf("Phase 2: Main app\n"); 456 457 // setup app 458 btstack_main(main_argc, main_argv); 459 } 460 461