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