1# 2# Serial device configuration 3# 4 5menuconfig SERIAL 6 bool "Serial" 7 default y 8 help 9 Enable support for serial drivers. This allows use of a serial UART 10 for displaying messages while U-Boot is running. It also brings in 11 printf() and panic() functions. This should normally be enabled 12 unless there are space reasons not to. If you just need to disable 13 the console you can adjust the stdout environment variable or use 14 SILENT_CONSOLE. 15 16if SERIAL 17 18config BAUDRATE 19 int "Default baudrate" 20 default 115200 21 help 22 Select a default baudrate, where "default" has a driver-specific 23 meaning of either setting the baudrate for the early debug UART 24 in the SPL stage (most drivers) or for choosing a default baudrate 25 in the absence of an environment setting (serial_mxc.c). 26 27config OF_SERIAL_BAUD 28 bool "Fetch serial baudrate from device tree" 29 depends on DM_SERIAL && SPL_ENV_SUPPORT 30 select DEFAULT_ENV_IS_RW 31 help 32 Select this to enable fetching and setting of the baudrate 33 configured in the DT. Replace the default baudrate with the DT 34 baudrate and also set it to the environment. 35 36config DEFAULT_ENV_IS_RW 37 bool "Make default environment as writable" 38 help 39 Select this to enable to make default environment writable. This 40 allows modifying the default environment. 41 42config REQUIRE_SERIAL_CONSOLE 43 bool "Require a serial port for console" 44 # Running without a serial console is not supported by the 45 # non-dm serial code 46 depends on DM_SERIAL 47 default y 48 help 49 Require a serial port for the console, and panic if none is found 50 during serial port initialization (default y). Set this to n on 51 boards which have no debug serial port whatsoever. 52 53config SPECIFY_CONSOLE_INDEX 54 bool "Specify the port number used for console" 55 default y if !DM_SERIAL || (SPL && !SPL_DM_SERIAL) || \ 56 (TPL && !TPL_DM_SERIAL) 57 help 58 In various cases, we need to specify which of the UART devices that 59 a board or SoC has available are to be used for the console device 60 in U-Boot. 61 62config SERIAL_PRESENT 63 bool "Provide a serial driver" 64 depends on DM_SERIAL 65 default y 66 help 67 In very space-constrained devices even the full UART driver is too 68 large. In this case the debug UART can still be used in some cases. 69 This option enables the full UART in U-Boot, so if is it disabled, 70 the full UART driver will be omitted, thus saving space. 71 72config SPL_SERIAL_PRESENT 73 bool "Provide a serial driver in SPL" 74 depends on DM_SERIAL && SPL 75 default y 76 help 77 In very space-constrained devices even the full UART driver is too 78 large. In this case the debug UART can still be used in some cases. 79 This option enables the full UART in SPL, so if is it disabled, 80 the full UART driver will be omitted, thus saving space. 81 82config TPL_SERIAL_PRESENT 83 bool "Provide a serial driver in TPL" 84 depends on DM_SERIAL && TPL 85 default y 86 help 87 In very space-constrained devices even the full UART driver is too 88 large. In this case the debug UART can still be used in some cases. 89 This option enables the full UART in TPL, so if is it disabled, 90 the full UART driver will be omitted, thus saving space. 91 92config VPL_SERIAL_PRESENT 93 bool "Provide a serial driver in VPL" 94 depends on DM_SERIAL && VPL 95 default y 96 help 97 In very space-constrained devices even the full UART driver is too 98 large. In this case the debug UART can still be used in some cases. 99 This option enables the full UART in TPL, so if is it disabled, 100 the full UART driver will be omitted, thus saving space. 101 102config CONS_INDEX 103 int "UART used for console" 104 depends on SPECIFY_CONSOLE_INDEX 105 range 0 6 106 default 1 107 help 108 Set this to match the UART number of the serial console. 109 110config DM_SERIAL 111 bool "Enable Driver Model for serial drivers" 112 depends on DM 113 select SYS_MALLOC_F 114 help 115 Enable driver model for serial. This replaces 116 drivers/serial/serial.c with the serial uclass, which 117 implements serial_putc() etc. The uclass interface is 118 defined in include/serial.h. 119 120config SERIAL_RX_BUFFER 121 bool "Enable RX buffer for serial input" 122 depends on DM_SERIAL 123 help 124 Enable RX buffer support for the serial driver. This enables 125 pasting longer strings, even when the RX FIFO of the UART is 126 not big enough (e.g. 16 bytes on the normal NS16550). 127 128config SERIAL_RX_BUFFER_SIZE 129 int "RX buffer size" 130 depends on SERIAL_RX_BUFFER 131 default 256 132 help 133 The size of the RX buffer (needs to be power of 2) 134 135config SERIAL_PUTS 136 bool "Enable printing strings all at once" 137 depends on DM_SERIAL 138 help 139 Some serial drivers are much more efficient when printing multiple 140 characters at once rather than printing characters individually. This 141 can be because they can load a fifo, or because individual print 142 calls have a constant overhead. With this option set, the serial 143 subsystem will try to provide serial drivers with as many characters 144 at once as possible, instead of printing characters one by one. Most 145 serial drivers do not need this config to print efficiently. If 146 unsure, say N. 147 148config SERIAL_SEARCH_ALL 149 bool "Search for serial devices after default one failed" 150 depends on DM_SERIAL 151 help 152 The serial subsystem only searches for a single serial device 153 that was instantiated, but does not check whether it was probed 154 correctly. With this option set, we make successful probing 155 mandatory and search for fallback serial devices if the default 156 device does not work. 157 158 If unsure, say N. 159 160config SERIAL_PROBE_ALL 161 bool "Probe all available serial devices" 162 depends on DM_SERIAL 163 help 164 The serial subsystem only probes for a single serial device, 165 but does not probe for other remaining serial devices. 166 With this option set, we make probing and searching for 167 all available devices optional. 168 Normally, U-Boot talks to one serial port at a time, but SBSA 169 compliant UART devices like PL011 require initialization 170 by firmware and to let the kernel use serial port for sending 171 and receiving the characters. 172 173 If unsure, say N. 174 175config SPL_DM_SERIAL 176 bool "Enable Driver Model for serial drivers in SPL" 177 depends on DM_SERIAL && SPL_DM 178 default y 179 help 180 Enable driver model for serial in SPL. This replaces 181 drivers/serial/serial.c with the serial uclass, which 182 implements serial_putc() etc. The uclass interface is 183 defined in include/serial.h. 184 185config TPL_DM_SERIAL 186 bool "Enable Driver Model for serial drivers in TPL" 187 depends on DM_SERIAL && TPL_DM 188 default y if TPL && DM_SERIAL 189 help 190 Enable driver model for serial in TPL. This replaces 191 drivers/serial/serial.c with the serial uclass, which 192 implements serial_putc() etc. The uclass interface is 193 defined in include/serial.h. 194 195config VPL_DM_SERIAL 196 bool "Enable Driver Model for serial drivers in VPL" 197 depends on DM_SERIAL 198 default y if VPL && DM_SERIAL 199 help 200 Enable driver model for serial in VPL. This replaces 201 drivers/serial/serial.c with the serial uclass, which 202 implements serial_putc() etc. The uclass interface is 203 defined in include/serial.h. 204 205config DEBUG_UART 206 bool "Enable an early debug UART for debugging" 207 help 208 The debug UART is intended for use very early in U-Boot to debug 209 problems when an ICE or other debug mechanism is not available. 210 211 To use it you should: 212 - Make sure your UART supports this interface 213 - Enable CONFIG_DEBUG_UART 214 - Enable the CONFIG for your UART to tell it to provide this interface 215 (e.g. CONFIG_DEBUG_UART_NS16550) 216 - Define the required settings as needed (see below) 217 - Call debug_uart_init() before use 218 - Call debug_uart_putc() to output a character 219 220 Depending on your platform it may be possible to use this UART before 221 a stack is available. 222 223 If your UART does not support this interface you can probably add 224 support quite easily. Remember that you cannot use driver model and 225 it is preferred to use no stack. 226 227 You must not use this UART once driver model is working and the 228 serial drivers are up and running (done in serial_init()). Otherwise 229 the drivers may conflict and you will get strange output. 230 231choice 232 prompt "Select which UART will provide the debug UART" 233 depends on DEBUG_UART 234 default DEBUG_SBI_CONSOLE if RISCV_SMODE 235 default DEBUG_UART_NS16550 236 237config DEBUG_UART_ALTERA_JTAGUART 238 bool "Altera JTAG UART" 239 depends on ALTERA_JTAG_UART 240 help 241 Select this to enable a debug UART using the altera_jtag_uart driver. 242 You will need to provide parameters to make this work. The driver will 243 be available until the real driver model serial is running. 244 245config DEBUG_UART_ALTERA_UART 246 bool "Altera UART" 247 depends on ALTERA_UART 248 help 249 Select this to enable a debug UART using the altera_uart driver. 250 You will need to provide parameters to make this work. The driver will 251 be available until the real driver model serial is running. 252 253config DEBUG_UART_AR933X 254 bool "QCA/Atheros ar933x" 255 depends on AR933X_UART 256 help 257 Select this to enable a debug UART using the ar933x uart driver. 258 You will need to provide parameters to make this work. The 259 driver will be available until the real driver model serial is 260 running. 261 262config DEBUG_ARC_SERIAL 263 bool "ARC UART" 264 depends on ARC_SERIAL 265 help 266 Select this to enable a debug UART using the ARC UART driver. 267 You will need to provide parameters to make this work. The 268 driver will be available until the real driver model serial is 269 running. 270 271config DEBUG_UART_ATMEL 272 bool "Atmel USART" 273 depends on ATMEL_USART 274 help 275 Select this to enable a debug UART using the atmel usart driver. You 276 will need to provide parameters to make this work. The driver will 277 be available until the real driver-model serial is running. 278 279config DEBUG_UART_BCM6345 280 bool "BCM6345 UART" 281 depends on BCM6345_SERIAL 282 help 283 Select this to enable a debug UART on BCM6345 SoCs. You 284 will need to provide parameters to make this work. The driver will 285 be available until the real driver model serial is running. 286 287config DEBUG_UART_NS16550 288 bool "ns16550" 289 depends on SYS_NS16550 290 help 291 Select this to enable a debug UART using the ns16550 driver. You 292 will need to provide parameters to make this work. The driver will 293 be available until the real driver model serial is running. 294 295config DEBUG_EFI_CONSOLE 296 bool "EFI" 297 depends on EFI_APP 298 help 299 Select this to enable a debug console which calls back to EFI to 300 output to the console. This can be useful for early debugging of 301 U-Boot when running on top of EFI (Extensive Firmware Interface). 302 This is a type of BIOS used by PCs. 303 304config DEBUG_SBI_CONSOLE 305 bool "SBI" 306 depends on RISCV_SMODE 307 help 308 Select this to enable a debug console which calls back to SBI to 309 output to the console. This can be useful for early debugging of 310 U-Boot when running on top of SBI (Supervisor Binary Interface). 311 This implementation of the debug UART is not available while in 312 M-mode (e.g. during SPL). 313 314config DEBUG_UART_S5P 315 bool "Samsung S5P" 316 depends on ARCH_APPLE || ARCH_EXYNOS || ARCH_S5PC1XX 317 help 318 Select this to enable a debug UART using the serial_s5p driver. You 319 will need to provide parameters to make this work. The driver will 320 be available until the real driver-model serial is running. 321 322config DEBUG_UART_MSM 323 bool "Qualcomm QUP UART debug" 324 depends on ARCH_SNAPDRAGON || ARCH_IPQ40XX 325 help 326 Select this to enable a debug UART using the serial_msm driver. You 327 will need to provide parameters to make this work. The driver will 328 be available until the real driver-model serial is running. 329 330config DEBUG_UART_MSM_GENI 331 bool "Qualcomm snapdragon" 332 depends on ARCH_SNAPDRAGON 333 help 334 Select this to enable a debug UART using the serial_msm driver. You 335 will need to provide parameters to make this work. The driver will 336 be available until the real driver-model serial is running. 337 338config DEBUG_UART_MESON 339 bool "Amlogic Meson" 340 depends on MESON_SERIAL 341 help 342 Select this to enable a debug UART using the serial_meson driver. You 343 will need to provide parameters to make this work. The driver will 344 be available until the real driver-model serial is running. 345 346config DEBUG_UART_UARTLITE 347 bool "Xilinx Uartlite" 348 depends on XILINX_UARTLITE 349 help 350 Select this to enable a debug UART using the serial_uartlite driver. 351 You will need to provide parameters to make this work. The driver will 352 be available until the real driver-model serial is running. 353 354config DEBUG_UART_ARM_DCC 355 bool "ARM DCC" 356 depends on ARM_DCC 357 help 358 Select this to enable a debug UART using the ARM JTAG DCC port. 359 The DCC port can be used for very early debugging and doesn't require 360 any additional setting like address/baudrate/clock. On systems without 361 any serial interface this is the easiest way how to get console. 362 Every ARM core has own DCC port which is the part of debug interface. 363 This port is available at least on ARMv6, ARMv7, ARMv8 and XScale 364 architectures. 365 366config DEBUG_MVEBU_A3700_UART 367 bool "Marvell Armada 3700" 368 depends on MVEBU_A3700_UART 369 help 370 Select this to enable a debug UART using the serial_mvebu driver. You 371 will need to provide parameters to make this work. The driver will 372 be available until the real driver-model serial is running. 373 374config DEBUG_UART_ZYNQ 375 bool "Xilinx Zynq" 376 depends on ZYNQ_SERIAL 377 help 378 Select this to enable a debug UART using the serial_zynq driver. You 379 will need to provide parameters to make this work. The driver will 380 be available until the real driver-model serial is running. 381 382config DEBUG_UART_APBUART 383 depends on LEON3 384 bool "Gaisler APBUART" 385 help 386 Select this to enable a debug UART using the serial_leon3 driver. You 387 will need to provide parameters to make this work. The driver will 388 be available until the real driver model serial is running. 389 390config DEBUG_UART_PL010 391 bool "pl010" 392 depends on PL01X_SERIAL 393 help 394 Select this to enable a debug UART using the pl01x driver with the 395 PL010 UART type. You will need to provide parameters to make this 396 work. The driver will be available until the real driver model 397 serial is running. 398 399config DEBUG_UART_PL011 400 bool "pl011" 401 depends on PL01X_SERIAL || PL011_SERIAL 402 help 403 Select this to enable a debug UART using the pl01x driver with the 404 PL011 UART type. You will need to provide parameters to make this 405 work. The driver will be available until the real driver model 406 serial is running. 407 408config DEBUG_UART_PIC32 409 bool "Microchip PIC32" 410 depends on PIC32_SERIAL 411 help 412 Select this to enable a debug UART using the serial_pic32 driver. You 413 will need to provide parameters to make this work. The driver will 414 be available until the real driver model serial is running. 415 416config DEBUG_UART_MXC 417 bool "IMX Serial port" 418 depends on MXC_UART 419 help 420 Select this to enable a debug UART using the serial_mxc driver. You 421 will need to provide parameters to make this work. The driver will 422 be available until the real driver model serial is running. 423 424config DEBUG_UART_SANDBOX 425 bool "sandbox" 426 depends on SANDBOX_SERIAL 427 help 428 Select this to enable the debug UART using the sandbox driver. This 429 provides basic serial output from the console without needing to 430 start up driver model. The driver will be available until the real 431 driver model serial is running. 432 433config DEBUG_UART_SEMIHOSTING 434 bool "semihosting" 435 depends on SEMIHOSTING_SERIAL 436 help 437 Select this to enable the debug UART using the semihosting driver. 438 This provides basic serial output from the console without needing to 439 start up driver model. The driver will be available until the real 440 driver model serial is running. 441 442config DEBUG_UART_SCIF 443 bool "Renesas SCIF UART" 444 depends on SH || ARCH_RENESAS 445 help 446 Select this to enable a debug UART using the serial_sh driver. You 447 will need to provide parameters to make this work. The driver will 448 be available until the real driver-model serial is running. 449 450config DEBUG_UART_SIFIVE 451 bool "SiFive UART" 452 depends on SIFIVE_SERIAL 453 help 454 Select this to enable a debug UART using the serial_sifive driver. You 455 will need to provide parameters to make this work. The driver will 456 be available until the real driver-model serial is running. 457 458config DEBUG_UART_STM32 459 bool "STMicroelectronics STM32" 460 depends on STM32_SERIAL 461 help 462 Select this to enable a debug UART using the serial_stm32 driver 463 You will need to provide parameters to make this work. 464 The driver will be available until the real driver model 465 serial is running. 466 467config DEBUG_UART_UNIPHIER 468 bool "UniPhier on-chip UART" 469 depends on ARCH_UNIPHIER 470 help 471 Select this to enable a debug UART using the UniPhier on-chip UART. 472 You will need to provide DEBUG_UART_BASE to make this work. The 473 driver will be available until the real driver-model serial is 474 running. 475 476config DEBUG_UART_OMAP 477 bool "OMAP uart" 478 depends on OMAP_SERIAL 479 help 480 Select this to enable a debug UART using the omap ns16550 driver. 481 You will need to provide parameters to make this work. The driver 482 will be available until the real driver model serial is running. 483 484config DEBUG_UART_MTK 485 bool "MediaTek High-speed UART" 486 depends on MTK_SERIAL 487 help 488 Select this to enable a debug UART using the MediaTek High-speed 489 UART driver. 490 You will need to provide parameters to make this work. The 491 driver will be available until the real driver model serial is 492 running. 493 494config DEBUG_UART_MT7620 495 bool "UART driver for MediaTek MT7620 and earlier SoCs" 496 depends on MT7620_SERIAL 497 help 498 Select this to enable a debug UART using the UART driver for 499 MediaTek MT7620 and earlier SoCs. 500 You will need to provide parameters to make this work. The 501 driver will be available until the real driver model serial is 502 running. 503 504config DEBUG_UART_XTENSA_SEMIHOSTING 505 bool "Xtensa semihosting" 506 depends on XTENSA_SEMIHOSTING_SERIAL 507 help 508 Select this to enable the debug UART using the Xtensa semihosting driver. 509 This provides basic serial output from the console without needing to 510 start up driver model. The driver will be available until the real 511 driver model serial is running. 512 513endchoice 514 515config DEBUG_UART_BASE 516 hex "Base address of UART" 517 depends on DEBUG_UART 518 default 0x0 if DEBUG_SBI_CONSOLE 519 default 0x0 if DEBUG_UART_SANDBOX 520 default 0xff000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQMP 521 default 0xe0000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQ 522 default 0xff000000 if DEBUG_UART_PL011 && ARCH_VERSAL 523 default 0xf1920000 if DEBUG_UART_PL011 && (ARCH_VERSAL_NET || ARCH_VERSAL2) 524 help 525 This is the base address of your UART for memory-mapped UARTs. 526 527 A default should be provided by your board, but if not you will need 528 to use the correct value here. 529 530config SPL_DEBUG_UART_BASE 531 hex "Base address of UART for SPL" 532 depends on SPL && DEBUG_UART 533 default DEBUG_UART_BASE 534 help 535 This is the base address of your UART for memory-mapped UARTs for SPL. 536 537config TPL_DEBUG_UART_BASE 538 hex "Base address of UART for TPL" 539 depends on TPL && DEBUG_UART 540 default DEBUG_UART_BASE 541 help 542 This is the base address of your UART for memory-mapped UARTs for TPL. 543 544config VPL_DEBUG_UART_BASE 545 hex "Base address of UART for VPL" 546 depends on VPL && DEBUG_UART 547 default DEBUG_UART_BASE 548 help 549 This is the base address of your UART for memory-mapped UARTs for VPL. 550 551config DEBUG_UART_CLOCK 552 int "UART input clock" 553 depends on DEBUG_UART 554 default 0 if DEBUG_SBI_CONSOLE 555 default 0 if DEBUG_UART_SANDBOX 556 default 0 if DEBUG_MVEBU_A3700_UART 557 default 100000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQMP 558 default 50000000 if DEBUG_UART_ZYNQ && ARCH_ZYNQ 559 default 100000000 if DEBUG_UART_PL011 && (ARCH_VERSAL || ARCH_VERSAL_NET || ARCH_VERSAL2) 560 help 561 The UART input clock determines the speed of the internal UART 562 circuitry. The baud rate is derived from this by dividing the input 563 clock down. 564 565 A default should be provided by your board, but if not you will need 566 to use the correct value here. 567 568config DEBUG_UART_SHIFT 569 int "UART register shift" 570 depends on DEBUG_UART 571 default 0 if DEBUG_UART 572 help 573 Some UARTs (notably ns16550) support different register layouts 574 where the registers are spaced either as bytes, words or some other 575 value. Use this value to specify the shift to use, where 0=byte 576 registers, 2=32-bit word registers, etc. 577 578config DEBUG_UART_BOARD_INIT 579 bool "Enable board-specific debug UART init" 580 depends on DEBUG_UART 581 help 582 Some boards need to set things up before the debug UART can be used. 583 On these boards a call to debug_uart_init() is insufficient. When 584 this option is enabled, the function board_debug_uart_init() will 585 be called when debug_uart_init() is called. You can put any code 586 here that is needed to set up the UART ready for use, such as set 587 pin multiplexing or enable clocks. 588 589config DEBUG_UART_ANNOUNCE 590 bool "Show a message when the debug UART starts up" 591 depends on DEBUG_UART 592 help 593 Enable this option to show a message when the debug UART is ready 594 for use. You will see a message like "<debug_uart> " as soon as 595 U-Boot has the UART ready for use (i.e. your code calls 596 debug_uart_init()). This can be useful just as a check that 597 everything is working. 598 599config DEBUG_UART_SKIP_INIT 600 bool "Skip UART initialization" 601 depends on DEBUG_UART 602 help 603 Select this if the UART you want to use for debug output is already 604 initialized by the time U-Boot starts its execution. 605 606config DEBUG_UART_NS16550_CHECK_ENABLED 607 bool "Check if UART is enabled on output" 608 depends on DEBUG_UART 609 depends on DEBUG_UART_NS16550 610 help 611 Select this if puts()/putc() might be called before the debug UART 612 has been initialized. If this is disabled, putc() might sit in a 613 tight loop if it is called before debug_uart_init() has been called. 614 615 Note that this does not work for every ns16550-compatible UART and 616 so has to be enabled carefully or you might notice lost characters. 617 618config ALTERA_JTAG_UART 619 bool "Altera JTAG UART support" 620 depends on DM_SERIAL 621 help 622 Select this to enable an JTAG UART for Altera devices.The JTAG UART 623 core implements a method to communicate serial character streams 624 between a host PC and a Qsys system on an Altera FPGA. Please find 625 details on the "Embedded Peripherals IP User Guide" of Altera. 626 627config ALTERA_JTAG_UART_BYPASS 628 bool "Bypass output when no connection" 629 depends on ALTERA_JTAG_UART 630 help 631 Bypass console output and keep going even if there is no JTAG 632 terminal connection with the host. The console output will resume 633 once the JTAG terminal is connected. Without the bypass, the console 634 output will wait forever until a JTAG terminal is connected. If you 635 not are sure, say Y. 636 637config ALTERA_UART 638 bool "Altera UART support" 639 depends on DM_SERIAL 640 help 641 Select this to enable an UART for Altera devices. Please find 642 details on the "Embedded Peripherals IP User Guide" of Altera. 643 644config AR933X_UART 645 bool "QCA/Atheros ar933x UART support" 646 depends on DM_SERIAL && SOC_AR933X 647 help 648 Select this to enable UART support for QCA/Atheros ar933x 649 devices. This driver uses driver model and requires a device 650 tree binding to operate, please refer to the document at 651 doc/device-tree-bindings/serial/qca,ar9330-uart.txt. 652 653config ARC_SERIAL 654 bool "ARC UART support" 655 depends on DM_SERIAL 656 help 657 Select this to enable support for ARC UART now typically 658 only used in Synopsys DesignWare ARC simulators like nSIM. 659 660config ARM_DCC 661 bool "ARM Debug Communication Channel (DCC) as UART support" 662 depends on ARM 663 help 664 Select this to enable using the ARM DCC as a form of UART. 665 666config ATMEL_USART 667 bool "Atmel USART support" 668 help 669 Select this to enable USART support for Atmel SoCs. It can be 670 configured in the device tree, and input clock frequency can 671 be got from the clk node. 672 673config SPL_UART_CLOCK 674 int "SPL fixed UART input clock" 675 depends on ATMEL_USART && SPL && !SPL_CLK 676 default 132096000 if ARCH_AT91 677 help 678 Provide a fixed clock value as input to the UART controller. This 679 might be needed on platforms which can't enable CONFIG_SPL_CLK 680 because of SPL image size restrictions. 681 682config BCM283X_MU_SERIAL 683 bool "Support for BCM283x Mini-UART" 684 depends on DM_SERIAL && ARCH_BCM283X 685 default y 686 help 687 Select this to enable Mini-UART support on BCM283X family of SoCs. 688 689config BCM283X_PL011_SERIAL 690 bool "Support for BCM283x PL011 UART" 691 depends on PL01X_SERIAL && ARCH_BCM283X 692 default y 693 help 694 Select this to enable an overriding PL011 driver for BCM283X SoCs 695 that supports automatic disable, so that it only gets used when 696 the UART is actually muxed. 697 698config BCM6345_SERIAL 699 bool "Support for BCM6345 UART" 700 depends on DM_SERIAL 701 help 702 Select this to enable UART on BCM6345 SoCs. 703 704config COREBOOT_SERIAL 705 bool "Coreboot UART support" 706 depends on DM_SERIAL 707 default y if SYS_COREBOOT 708 select SYS_NS16550 709 help 710 Select this to enable a ns16550-style UART where the platform data 711 comes from the coreboot 'sysinfo' tables. This allows U-Boot to have 712 a serial console on any platform without needing to change the 713 device tree, etc. 714 715config COREBOOT_SERIAL_FROM_DBG2 716 bool "Obtain UART from ACPI tables" 717 depends on COREBOOT_SERIAL 718 default y 719 help 720 Select this to try to find a DBG2 record in the ACPI tables, in the 721 event that coreboot does not provide information about the UART in the 722 normal sysinfo tables. This provides a useful fallback when serial 723 is not enabled in coreboot. 724 725config CORTINA_UART 726 bool "Cortina UART support" 727 depends on DM_SERIAL 728 help 729 Select this to enable UART support for Cortina-Access UART devices 730 found on CAxxxx SoCs. 731 732config FSL_LINFLEXUART 733 bool "Freescale Linflex UART support" 734 depends on DM_SERIAL 735 help 736 Select this to enable the Linflex serial module found on some 737 NXP SoCs like S32V234. 738 739config FSL_LPUART 740 bool "Freescale LPUART support" 741 help 742 Select this to enable a Low Power UART for Freescale VF610 and 743 QorIQ Layerscape devices. 744 745config LPUART 746 bool "Use the LPUART as console" 747 depends on FSL_LPUART 748 749config MVEBU_A3700_UART 750 bool "UART support for Armada 3700" 751 help 752 Choose this option to add support for UART driver on the Marvell 753 Armada 3700 SoC. The base address is configured via DT. 754 755config MCFUART 756 bool "Freescale ColdFire UART support" 757 help 758 Choose this option to add support for UART driver on the ColdFire 759 SoC's family. The serial communication channel provides a full-duplex 760 asynchronous/synchronous receiver and transmitter deriving an 761 operating frequency from the internal bus clock or an external clock. 762 763config MXC_UART 764 bool "IMX serial port support" 765 depends on MX5 || MX6 || MX7 || IMX8M 766 help 767 If you have a machine based on a Motorola IMX CPU you 768 can enable its onboard serial port by enabling this option. 769 770config NULLDEV_SERIAL 771 bool "Null serial device" 772 help 773 Select this to enable null serial device support. A null serial 774 device merely acts as a placeholder for a serial device and does 775 nothing for all it's operation. 776 777config PIC32_SERIAL 778 bool "Support for Microchip PIC32 on-chip UART" 779 depends on DM_SERIAL && MACH_PIC32 780 default y 781 help 782 Support for the UART found on Microchip PIC32 SoC's. 783 784config SYS_NS16550_SERIAL 785 bool "NS16550 UART or compatible legacy driver" 786 depends on !DM_SERIAL 787 select SYS_NS16550 788 789config SPL_SYS_NS16550_SERIAL 790 bool "NS16550 UART or compatible legacy driver in SPL" 791 depends on SPL && !SPL_DM_SERIAL 792 default y if SYS_NS16550_SERIAL || ARCH_SUNXI || ARCH_OMAP2PLUS 793 select SYS_NS16550 794 795config TPL_SYS_NS16550_SERIAL 796 bool "NS16550 UART or compatible legacy driver in TPL" 797 depends on TPL && !TPL_DM_SERIAL 798 default y if SPL_SYS_NS16550_SERIAL 799 select SYS_NS16550 800 801config SYS_NS16550 802 bool "NS16550 UART or compatible" 803 help 804 Support NS16550 UART or compatible. This can be enabled in the 805 device tree with the correct input clock frequency. If the input 806 clock frequency is not defined in the device tree, the macro 807 CFG_SYS_NS16550_CLK defined in a legacy board header file will 808 be used. It can be a constant or a function to get clock, eg, 809 get_serial_clock(). 810 811config NS16550_DYNAMIC 812 bool "Allow NS16550 to be configured at runtime" 813 depends on SYS_NS16550 814 default y if SYS_COREBOOT || SYS_SLIMBOOTLOADER 815 help 816 Enable this option to allow device-tree control of the driver. 817 818 Normally this driver is controlled by the following options: 819 820 It is not a good practice for a driver to be statically configured, 821 since it prevents the same driver being used for different types of 822 UARTs in a system. This option avoids this problem at the cost of a 823 slightly increased code size. 824 825config SYS_NS16550_MEM32 826 bool "If memory-mapped, 32bit access is needed for ns16550 register access" 827 depends on SYS_NS16550 828 help 829 If enabled, if memory-mapped, indicates that 32-bit access should be 830 used (instead of 8-bit) for register access. 831 832config SYS_NS16550_PORT_MAPPED 833 bool "Port I/O is used for ns16550 register access" 834 depends on SYS_NS16550 835 help 836 If enabled, port I/O is used for ns16550 register access. If not 837 enabled, then the UART is memory-mapped. 838 839config SYS_NS16550_REG_SIZE 840 int "ns16550 register width and endianness" 841 depends on SYS_NS16550_SERIAL || SPL_SYS_NS16550_SERIAL 842 range -4 4 843 default -4 if ARCH_OMAP2PLUS || ARCH_SUNXI 844 default 1 845 help 846 Indicates register width and also endianness. If positive, big-endian 847 access is used. If negative, little-endian is used. 848 849config SPL_NS16550_MIN_FUNCTIONS 850 bool "Only provide NS16550_init and NS16550_putc in SPL" 851 depends on SPL_SYS_NS16550_SERIAL && PPC 852 help 853 Enable this if you desire to only have use of the NS16550_init and 854 NS16550_putc functions for the serial driver located at 855 drivers/serial/ns16550.c. This option is useful for saving space for 856 already greatly restricted images, including but not limited to 857 NAND_SPL configurations. 858 859config INTEL_MID_SERIAL 860 bool "Intel MID platform UART support" 861 depends on DM_SERIAL && OF_CONTROL 862 depends on INTEL_MID 863 select SYS_NS16550 864 help 865 Select this to enable a UART for Intel MID platforms. 866 This uses the ns16550 driver as a library. 867 868config PL011_SERIAL 869 bool "ARM PL011 driver" 870 depends on !DM_SERIAL 871 help 872 Select this to enable a UART for platforms using PL011. 873 874config PL01X_SERIAL 875 bool "ARM PL010 and PL011 driver" 876 depends on DM_SERIAL 877 help 878 Select this to enable a UART for platforms using PL010 or PL011. 879 880config ROCKCHIP_SERIAL 881 bool "Rockchip on-chip UART support" 882 depends on DM_SERIAL 883 select SYS_NS16550 884 help 885 Select this to enable a debug UART for Rockchip devices when using 886 OF_PLATDATA (i.e. a compiled-in device tree replacemenmt). 887 This uses the ns16550 driver, converting the platdata from of-platdata 888 to the ns16550 format. 889 890config S5P_SERIAL 891 bool "Support for Samsung S5P UART" 892 depends on ARCH_APPLE || ARCH_EXYNOS || ARCH_S5PC1XX 893 default y 894 help 895 Select this to enable Samsung S5P UART support. 896 897config S5P4418_PL011_SERIAL 898 bool "Extended PL011 driver for S5P4418" 899 depends on DM_SERIAL && PL01X_SERIAL && ARCH_NEXELL 900 default y 901 help 902 Select this to enable support of the PL011 UARTs in the S5P4418 SOC. 903 With this driver the UART-clocks are set to the appropriate rate 904 (if not 'skip-init'). 905 906config SANDBOX_SERIAL 907 bool "Sandbox UART support" 908 depends on SANDBOX 909 imply SERIAL_PUTS 910 help 911 Select this to enable a seral UART for sandbox. This is required to 912 operate correctly, otherwise you will see no serial output from 913 sandbox. The emulated UART will display to the console and console 914 input will be fed into the UART. This allows you to interact with 915 U-Boot. 916 917 The operation of the console is controlled by the -t command-line 918 flag. In raw mode, U-Boot sees all characters from the terminal 919 before they are processed, including Ctrl-C. In cooked mode, Ctrl-C 920 is processed by the terminal, and terminates U-Boot. Valid options 921 are: 922 923 -t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot 924 -t raw Raw mode, Ctrl-C is processed by U-Boot 925 -t cooked Cooked mode, Ctrl-C terminates 926 927config SCIF_CONSOLE 928 bool "Renesas SCIF UART support" 929 depends on SH || ARCH_RENESAS 930 help 931 Select this to enable Renesas SCIF UART. To operate serial ports 932 on systems with R-Car or SH SoCs, say Y to this option. If unsure, 933 say N. 934 935choice 936 prompt "SCIF console port" 937 depends on SCIF_CONSOLE && (!DM_SERIAL || (SPL && !SPL_DM_SERIAL)) 938 939config CONS_SCIF0 940 bool "SCIF0" 941 942config CONS_SCIF1 943 bool "SCIF1" 944 945config CONS_SCIF2 946 bool "SCIF2" 947 948config CONS_SCIF4 949 bool "SCIF4" 950 951config CONS_SCIFA0 952 bool "SCIFA0" 953 954endchoice 955 956config SH_SCIF_CLK_FREQ 957 int "SCIF console clock frequency" 958 depends on SCIF_CONSOLE && (!DM_SERIAL || (SPL && !SPL_DM_SERIAL)) 959 default 65000000 960 961config SEMIHOSTING_SERIAL 962 bool "Semihosting UART support" 963 depends on SEMIHOSTING && !SERIAL_RX_BUFFER 964 help 965 Select this to enable a serial UART using semihosting. Special halt 966 instructions will be issued which an external debugger (such as a 967 JTAG emulator) may interpret. The debugger will display U-Boot's 968 console output on the host system. 969 970 Enable this option only if you are using a debugger which supports 971 semihosting. If you are not using a debugger, this driver will halt 972 the boot. 973 974config UNIPHIER_SERIAL 975 bool "Support for UniPhier on-chip UART" 976 depends on ARCH_UNIPHIER 977 default y 978 help 979 If you have a UniPhier based board and want to use the on-chip 980 serial ports, say Y to this option. If unsure, say N. 981 982config XILINX_UARTLITE 983 bool "Xilinx Uarlite support" 984 depends on DM_SERIAL 985 help 986 If you have a Xilinx based board and want to use the uartlite 987 serial ports, say Y to this option. If unsure, say N. 988 989config MESON_SERIAL 990 bool "Support for Amlogic Meson UART" 991 depends on DM_SERIAL && ARCH_MESON 992 help 993 If you have an Amlogic Meson based board and want to use the on-chip 994 serial ports, say Y to this option. If unsure, say N. 995 996config MSM_SERIAL 997 bool "Qualcomm on-chip UART" 998 depends on DM_SERIAL 999 help 1000 Support Data Mover UART used on Qualcomm Snapdragon SoCs. 1001 It should support all Qualcomm devices with UARTDM version 1.4, 1002 for example APQ8016 and MSM8916. 1003 Single baudrate is supported in current implementation (115200). 1004 1005config MSM_GENI_SERIAL 1006 bool "Qualcomm on-chip GENI UART" 1007 help 1008 Support UART based on Generic Interface (GENI) Serial Engine (SE), 1009 used on Qualcomm Snapdragon SoCs. Should support all qualcomm SOCs 1010 with Qualcomm Universal Peripheral (QUP) Wrapper cores, 1011 i.e. newer ones, starting from SDM845. 1012 Driver works in FIFO mode. 1013 Multiple baudrates supported. 1014 1015config MXS_AUART_SERIAL 1016 bool "MXS AUART" 1017 depends on DM_SERIAL 1018 help 1019 Support for Freescale i.MX23 / i.MX28 AUART or Application UART IP. 1020 This IP is present in the aforementioned SoCs, however this is not 1021 the IP used to drive the Debug UART port, for that see PL01X_SERIAL . 1022 1023config OCTEON_SERIAL_BOOTCMD 1024 bool "MIPS Octeon PCI remote bootcmd input" 1025 depends on ARCH_OCTEON 1026 depends on DM_SERIAL 1027 select SYS_IS_IN_ENV 1028 select CONSOLE_MUX 1029 help 1030 This driver supports remote input over the PCIe bus from a host 1031 to U-Boot for entering commands. It is utilized by the host 1032 commands 'oct-remote-load' and 'oct-remote-bootcmd'. 1033 1034config OCTEON_SERIAL_PCIE_CONSOLE 1035 bool "MIPS Octeon PCIe remote console" 1036 depends on ARCH_OCTEON 1037 depends on (DM_SERIAL && DM_STDIO) 1038 select SYS_STDIO_DEREGISTER 1039 select SYS_CONSOLE_IS_IN_ENV 1040 select CONSOLE_MUX 1041 help 1042 This driver supports remote console over the PCIe bus when the 1043 Octeon is running in PCIe target mode. The host program 1044 'oct-remote-console' can be used to connect to this console. 1045 The console number will likely be 0 or 1. 1046 1047config OMAP_SERIAL 1048 bool "Support for OMAP specific UART" 1049 depends on DM_SERIAL 1050 default y if (ARCH_OMAP2PLUS || ARCH_K3) 1051 select SYS_NS16550 1052 help 1053 If you have an TI based SoC and want to use the on-chip serial 1054 port, say Y to this option. If unsure say N. 1055 1056config OWL_SERIAL 1057 bool "Actions Semi OWL UART" 1058 depends on DM_SERIAL && ARCH_OWL 1059 help 1060 If you have a Actions Semi OWL based board and want to use the on-chip 1061 serial port, say Y to this option. If unsure, say N. 1062 Single baudrate is supported in current implementation (115200). 1063 1064config HTIF_CONSOLE 1065 bool "RISC-V HTIF console support" 1066 depends on DM_SERIAL && 64BIT 1067 help 1068 Select this to enable host transfer interface (HTIF) based serial 1069 console. The HTIF device is quite common in RISC-V emulators and 1070 RISC-V ISS so this driver allows using U-Boot on such platforms. 1071 1072config SIFIVE_SERIAL 1073 bool "SiFive UART support" 1074 depends on DM_SERIAL 1075 help 1076 This driver supports the SiFive UART. If unsure say N. 1077 1078config STI_ASC_SERIAL 1079 bool "STMicroelectronics on-chip UART" 1080 depends on DM_SERIAL && ARCH_STI 1081 help 1082 Select this to enable Asynchronous Serial Controller available 1083 on STiH410 SoC. This is a basic implementation, it supports 1084 following baudrate 9600, 19200, 38400, 57600 and 115200. 1085 1086config STM32_SERIAL 1087 bool "STMicroelectronics STM32 SoCs on-chip UART" 1088 depends on DM_SERIAL && (STM32F4 || STM32F7 || STM32H7 || ARCH_STM32MP) 1089 help 1090 If you have a machine based on a STM32 F4, F7, H7 or MP1 SOC 1091 you can enable its onboard serial ports, say Y to this option. 1092 If unsure, say N. 1093 1094config ZYNQ_SERIAL 1095 bool "Cadence (Xilinx Zynq) UART support" 1096 depends on DM_SERIAL 1097 help 1098 This driver supports the Cadence UART. It is found e.g. in Xilinx 1099 Zynq/ZynqMP. 1100 1101config MTK_SERIAL 1102 bool "MediaTek High-speed UART support" 1103 depends on DM_SERIAL 1104 help 1105 Select this to enable UART support for MediaTek High-speed UART 1106 devices. This driver uses driver model and requires a device 1107 tree binding to operate. 1108 The High-speed UART is compatible with the ns16550a UART and have 1109 its own high-speed registers. 1110 1111config MT7620_SERIAL 1112 bool "UART driver for MediaTek MT7620 and earlier SoCs" 1113 depends on DM_SERIAL 1114 help 1115 Select this to enable UART support for MediaTek MT7620 and earlier 1116 SoCs. This driver uses driver model and requires a device tree 1117 binding to operate. 1118 The UART driver for MediaTek MT7620 and earlier SoCs is *NOT* 1119 compatible with the ns16550a UART. 1120 1121config MPC8XX_CONS 1122 bool "Console driver for MPC8XX" 1123 depends on MPC8xx 1124 default y 1125 1126config NPCM_SERIAL 1127 bool "Nuvoton NPCM UART driver" 1128 depends on DM_SERIAL 1129 help 1130 Select this to enable UART support for Nuvoton BMCs 1131 (NPCM7xx and NPCM8xx). 1132 The driver enables the onboard serial port with 8-N-1 1133 configuration. 1134 1135config XEN_SERIAL 1136 bool "XEN serial support" 1137 depends on XEN 1138 help 1139 If built without DM support, then requires Xen 1140 to be built with CONFIG_VERBOSE_DEBUG. 1141 1142config XTENSA_SEMIHOSTING_SERIAL 1143 bool "Xtensa Semihosting UART support" 1144 depends on DM_SERIAL 1145 depends on XTENSA_SEMIHOSTING 1146 imply SERIAL_PUTS 1147 help 1148 Select this to enable a serial UART using Xtensa semihosting. 1149 1150choice 1151 prompt "Console port" 1152 default 8xx_CONS_SMC1 1153 depends on MPC8XX_CONS 1154 help 1155 Depending on board, select one serial port 1156 (CONFIG_8xx_CONS_SMC1 or CONFIG_8xx_CONS_SMC2) 1157 1158config 8xx_CONS_SMC1 1159 bool "SMC1" 1160 1161config 8xx_CONS_SMC2 1162 bool "SMC2" 1163 1164endchoice 1165 1166config SYS_SMC_RXBUFLEN 1167 int "Console Rx buffer length" 1168 depends on MPC8XX_CONS 1169 default 1 1170 help 1171 With CONFIG_SYS_SMC_RXBUFLEN it is possible to define 1172 the maximum receive buffer length for the SMC. 1173 This option is actual only for 8xx possible. 1174 If using CONFIG_SYS_SMC_RXBUFLEN also CONFIG_SYS_MAXIDLE 1175 must be defined, to setup the maximum idle timeout for 1176 the SMC. 1177 1178config SYS_MAXIDLE 1179 int "maximum idle timeout" 1180 depends on MPC8XX_CONS 1181 default 0 1182 1183config SYS_BRGCLK_PRESCALE 1184 int "BRG Clock Prescale" 1185 depends on MPC8XX_CONS 1186 default 1 1187 1188config SYS_SDSR 1189 hex "SDSR Value" 1190 depends on MPC8XX_CONS 1191 default 0x83 1192 1193config SYS_SDMR 1194 hex "SDMR Value" 1195 depends on MPC8XX_CONS 1196 default 0x0 1197 1198endif 1199