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