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