1# 2# Serial device configuration 3# 4 5menu "Serial drivers" 6 7config BAUDRATE 8 int "Default baudrate" 9 default 115200 10 help 11 Select a default baudrate, where "default" has a driver-specific 12 meaning of either setting the baudrate for the early debug UART 13 in the SPL stage (most drivers) or for choosing a default baudrate 14 in the absence of an environment setting (serial_mxc.c). 15 16config REQUIRE_SERIAL_CONSOLE 17 bool "Require a serial port for console" 18 # Running without a serial console is not supported by the 19 # non-dm serial code 20 depends on DM_SERIAL 21 default y 22 help 23 Require a serial port for the console, and panic if none is found 24 during serial port initialization (default y). Set this to n on 25 boards which have no debug serial port whatsoever. 26 27config SERIAL_PRESENT 28 bool "Provide a serial driver" 29 depends on DM_SERIAL 30 default y 31 help 32 In very space-constrained devices even the full UART driver is too 33 large. In this case the debug UART can still be used in some cases. 34 This option enables the full UART in U-Boot, so if is it disabled, 35 the full UART driver will be omitted, thus saving space. 36 37config SPL_SERIAL_PRESENT 38 bool "Provide a serial driver in SPL" 39 depends on DM_SERIAL 40 default y 41 help 42 In very space-constrained devices even the full UART driver is too 43 large. In this case the debug UART can still be used in some cases. 44 This option enables the full UART in SPL, so if is it disabled, 45 the full UART driver will be omitted, thus saving space. 46 47config CONS_INDEX 48 int "UART used for console" 49 depends on ARCH_SUNXI 50 default 2 if MACH_SUN5I 51 default 5 if MACH_SUN8I_A23 || MACH_SUN8I_A33 52 default 1 53 help 54 Configures the console index. 55 For Allwinner SoC., default values are 2 for SUN5I and 5 for A23/A33. 56 Otherwise, the index equals 1. 57 58config DM_SERIAL 59 bool "Enable Driver Model for serial drivers" 60 depends on DM 61 help 62 Enable driver model for serial. This replaces 63 drivers/serial/serial.c with the serial uclass, which 64 implements serial_putc() etc. The uclass interface is 65 defined in include/serial.h. 66 67config SPL_DM_SERIAL 68 bool "Enable Driver Model for serial drivers" 69 depends on DM_SERIAL 70 default y if SPL && DM_SERIAL 71 help 72 Enable driver model for serial in SPL. This replaces 73 drivers/serial/serial.c with the serial uclass, which 74 implements serial_putc() etc. The uclass interface is 75 defined in include/serial.h. 76 77config TPL_DM_SERIAL 78 bool "Enable Driver Model for serial drivers" 79 depends on DM_SERIAL 80 default y if TPL && DM_SERIAL 81 help 82 Enable driver model for serial in TPL. This replaces 83 drivers/serial/serial.c with the serial uclass, which 84 implements serial_putc() etc. The uclass interface is 85 defined in include/serial.h. 86 87config DEBUG_UART 88 bool "Enable an early debug UART for debugging" 89 help 90 The debug UART is intended for use very early in U-Boot to debug 91 problems when an ICE or other debug mechanism is not available. 92 93 To use it you should: 94 - Make sure your UART supports this interface 95 - Enable CONFIG_DEBUG_UART 96 - Enable the CONFIG for your UART to tell it to provide this interface 97 (e.g. CONFIG_DEBUG_UART_NS16550) 98 - Define the required settings as needed (see below) 99 - Call debug_uart_init() before use 100 - Call debug_uart_putc() to output a character 101 102 Depending on your platform it may be possible to use this UART before 103 a stack is available. 104 105 If your UART does not support this interface you can probably add 106 support quite easily. Remember that you cannot use driver model and 107 it is preferred to use no stack. 108 109 You must not use this UART once driver model is working and the 110 serial drivers are up and running (done in serial_init()). Otherwise 111 the drivers may conflict and you will get strange output. 112 113choice 114 prompt "Select which UART will provide the debug UART" 115 depends on DEBUG_UART 116 default DEBUG_UART_NS16550 117 118config DEBUG_UART_ALTERA_JTAGUART 119 bool "Altera JTAG UART" 120 help 121 Select this to enable a debug UART using the altera_jtag_uart driver. 122 You will need to provide parameters to make this work. The driver will 123 be available until the real driver model serial is running. 124 125config DEBUG_UART_ALTERA_UART 126 bool "Altera UART" 127 help 128 Select this to enable a debug UART using the altera_uart driver. 129 You will need to provide parameters to make this work. The driver will 130 be available until the real driver model serial is running. 131 132config DEBUG_UART_AR933X 133 bool "QCA/Atheros ar933x" 134 depends on AR933X_UART 135 help 136 Select this to enable a debug UART using the ar933x uart driver. 137 You will need to provide parameters to make this work. The 138 driver will be available until the real driver model serial is 139 running. 140 141config DEBUG_UART_ATMEL 142 bool "Atmel USART" 143 help 144 Select this to enable a debug UART using the atmel usart driver. You 145 will need to provide parameters to make this work. The driver will 146 be available until the real driver-model serial is running. 147 148config DEBUG_UART_BCM6345 149 bool "BCM6345 UART" 150 depends on BCM6345_SERIAL 151 help 152 Select this to enable a debug UART on BCM6345 SoCs. You 153 will need to provide parameters to make this work. The driver will 154 be available until the real driver model serial is running. 155 156config DEBUG_UART_NS16550 157 bool "ns16550" 158 help 159 Select this to enable a debug UART using the ns16550 driver. You 160 will need to provide parameters to make this work. The driver will 161 be available until the real driver model serial is running. 162 163config DEBUG_EFI_CONSOLE 164 bool "EFI" 165 depends on EFI_APP 166 help 167 Select this to enable a debug console which calls back to EFI to 168 output to the console. This can be useful for early debugging of 169 U-Boot when running on top of EFI (Extensive Firmware Interface). 170 This is a type of BIOS used by PCs. 171 172config DEBUG_UART_S5P 173 bool "Samsung S5P" 174 help 175 Select this to enable a debug UART using the serial_s5p driver. You 176 will need to provide parameters to make this work. The driver will 177 be available until the real driver-model serial is running. 178 179config DEBUG_UART_MESON 180 bool "Amlogic Meson" 181 depends on MESON_SERIAL 182 help 183 Select this to enable a debug UART using the serial_meson driver. You 184 will need to provide parameters to make this work. The driver will 185 be available until the real driver-model serial is running. 186 187config DEBUG_UART_UARTLITE 188 bool "Xilinx Uartlite" 189 help 190 Select this to enable a debug UART using the serial_uartlite driver. 191 You will need to provide parameters to make this work. The driver will 192 be available until the real driver-model serial is running. 193 194config DEBUG_UART_ARM_DCC 195 bool "ARM DCC" 196 help 197 Select this to enable a debug UART using the ARM JTAG DCC port. 198 The DCC port can be used for very early debugging and doesn't require 199 any additional setting like address/baudrate/clock. On systems without 200 any serial interface this is the easiest way how to get console. 201 Every ARM core has own DCC port which is the part of debug interface. 202 This port is available at least on ARMv6, ARMv7, ARMv8 and XScale 203 architectures. 204 205config DEBUG_MVEBU_A3700_UART 206 bool "Marvell Armada 3700" 207 help 208 Select this to enable a debug UART using the serial_mvebu driver. You 209 will need to provide parameters to make this work. The driver will 210 be available until the real driver-model serial is running. 211 212config DEBUG_UART_ZYNQ 213 bool "Xilinx Zynq" 214 help 215 Select this to enable a debug UART using the serial_zynq driver. You 216 will need to provide parameters to make this work. The driver will 217 be available until the real driver-model serial is running. 218 219config DEBUG_UART_APBUART 220 depends on LEON3 221 bool "Gaisler APBUART" 222 help 223 Select this to enable a debug UART using the serial_leon3 driver. You 224 will need to provide parameters to make this work. The driver will 225 be available until the real driver model serial is running. 226 227config DEBUG_UART_PL010 228 bool "pl010" 229 help 230 Select this to enable a debug UART using the pl01x driver with the 231 PL010 UART type. You will need to provide parameters to make this 232 work. The driver will be available until the real driver model 233 serial is running. 234 235config DEBUG_UART_PL011 236 bool "pl011" 237 help 238 Select this to enable a debug UART using the pl01x driver with the 239 PL011 UART type. You will need to provide parameters to make this 240 work. The driver will be available until the real driver model 241 serial is running. 242 243config DEBUG_UART_PIC32 244 bool "Microchip PIC32" 245 depends on PIC32_SERIAL 246 help 247 Select this to enable a debug UART using the serial_pic32 driver. You 248 will need to provide parameters to make this work. The driver will 249 be available until the real driver model serial is running. 250 251config DEBUG_UART_UNIPHIER 252 bool "UniPhier on-chip UART" 253 depends on ARCH_UNIPHIER 254 help 255 Select this to enable a debug UART using the UniPhier on-chip UART. 256 You will need to provide DEBUG_UART_BASE to make this work. The 257 driver will be available until the real driver-model serial is 258 running. 259 260endchoice 261 262config DEBUG_UART_BASE 263 hex "Base address of UART" 264 depends on DEBUG_UART 265 help 266 This is the base address of your UART for memory-mapped UARTs. 267 268 A default should be provided by your board, but if not you will need 269 to use the correct value here. 270 271config DEBUG_UART_CLOCK 272 int "UART input clock" 273 depends on DEBUG_UART 274 help 275 The UART input clock determines the speed of the internal UART 276 circuitry. The baud rate is derived from this by dividing the input 277 clock down. 278 279 A default should be provided by your board, but if not you will need 280 to use the correct value here. 281 282config DEBUG_UART_SHIFT 283 int "UART register shift" 284 depends on DEBUG_UART 285 default 0 if DEBUG_UART 286 help 287 Some UARTs (notably ns16550) support different register layouts 288 where the registers are spaced either as bytes, words or some other 289 value. Use this value to specify the shift to use, where 0=byte 290 registers, 2=32-bit word registers, etc. 291 292config DEBUG_UART_BOARD_INIT 293 bool "Enable board-specific debug UART init" 294 depends on DEBUG_UART 295 help 296 Some boards need to set things up before the debug UART can be used. 297 On these boards a call to debug_uart_init() is insufficient. When 298 this option is enabled, the function board_debug_uart_init() will 299 be called when debug_uart_init() is called. You can put any code 300 here that is needed to set up the UART ready for use, such as set 301 pin multiplexing or enable clocks. 302 303config DEBUG_UART_ANNOUNCE 304 bool "Show a message when the debug UART starts up" 305 depends on DEBUG_UART 306 help 307 Enable this option to show a message when the debug UART is ready 308 for use. You will see a message like "<debug_uart> " as soon as 309 U-Boot has the UART ready for use (i.e. your code calls 310 debug_uart_init()). This can be useful just as a check that 311 everything is working. 312 313config DEBUG_UART_SKIP_INIT 314 bool "Skip UART initialization" 315 help 316 Select this if the UART you want to use for debug output is already 317 initialized by the time U-Boot starts its execution. 318 319config ALTERA_JTAG_UART 320 bool "Altera JTAG UART support" 321 depends on DM_SERIAL 322 help 323 Select this to enable an JTAG UART for Altera devices.The JTAG UART 324 core implements a method to communicate serial character streams 325 between a host PC and a Qsys system on an Altera FPGA. Please find 326 details on the "Embedded Peripherals IP User Guide" of Altera. 327 328config ALTERA_JTAG_UART_BYPASS 329 bool "Bypass output when no connection" 330 depends on ALTERA_JTAG_UART 331 help 332 Bypass console output and keep going even if there is no JTAG 333 terminal connection with the host. The console output will resume 334 once the JTAG terminal is connected. Without the bypass, the console 335 output will wait forever until a JTAG terminal is connected. If you 336 not are sure, say Y. 337 338config ALTERA_UART 339 bool "Altera UART support" 340 depends on DM_SERIAL 341 help 342 Select this to enable an UART for Altera devices. Please find 343 details on the "Embedded Peripherals IP User Guide" of Altera. 344 345config AR933X_UART 346 bool "QCA/Atheros ar933x UART support" 347 depends on DM_SERIAL && SOC_AR933X 348 help 349 Select this to enable UART support for QCA/Atheros ar933x 350 devices. This driver uses driver model and requires a device 351 tree binding to operate, please refer to the document at 352 doc/device-tree-bindings/serial/qca,ar9330-uart.txt. 353 354config ATMEL_USART 355 bool "Atmel USART support" 356 help 357 Select this to enable USART support for Atmel SoCs. It can be 358 configured in the device tree, and input clock frequency can 359 be got from the clk node. 360 361config BCM6345_SERIAL 362 bool "Support for BCM6345 UART" 363 depends on DM_SERIAL && ARCH_BMIPS 364 help 365 Select this to enable UART on BCM6345 SoCs. 366 367config FSL_LPUART 368 bool "Freescale LPUART support" 369 help 370 Select this to enable a Low Power UART for Freescale VF610 and 371 QorIQ Layerscape devices. 372 373config MVEBU_A3700_UART 374 bool "UART support for Armada 3700" 375 default n 376 help 377 Choose this option to add support for UART driver on the Marvell 378 Armada 3700 SoC. The base address is configured via DT. 379 380config MXC_UART 381 bool "IMX serial port support" 382 depends on MX5 || MX6 383 help 384 If you have a machine based on a Motorola IMX CPU you 385 can enable its onboard serial port by enabling this option. 386 387config PIC32_SERIAL 388 bool "Support for Microchip PIC32 on-chip UART" 389 depends on DM_SERIAL && MACH_PIC32 390 default y 391 help 392 Support for the UART found on Microchip PIC32 SoC's. 393 394config SYS_NS16550 395 bool "NS16550 UART or compatible" 396 help 397 Support NS16550 UART or compatible. This can be enabled in the 398 device tree with the correct input clock frequency. If the input 399 clock frequency is not defined in the device tree, the macro 400 CONFIG_SYS_NS16550_CLK defined in a legacy board header file will 401 be used. It can be a constant or a function to get clock, eg, 402 get_serial_clock(). 403 404config INTEL_MID_SERIAL 405 bool "Intel MID platform UART support" 406 depends on DM_SERIAL && OF_CONTROL 407 depends on INTEL_MID 408 select SYS_NS16550 409 help 410 Select this to enable a UART for Intel MID platforms. 411 This uses the ns16550 driver as a library. 412 413config ROCKCHIP_SERIAL 414 bool "Rockchip on-chip UART support" 415 depends on DM_SERIAL && SPL_OF_PLATDATA 416 help 417 Select this to enable a debug UART for Rockchip devices when using 418 CONFIG_SPL_OF_PLATDATA (i.e. a compiled-in device tree replacemenmt). 419 This uses the ns16550 driver, converting the platdata from of-platdata 420 to the ns16550 format. 421 422config SANDBOX_SERIAL 423 bool "Sandbox UART support" 424 depends on SANDBOX 425 help 426 Select this to enable a seral UART for sandbox. This is required to 427 operate correctly, otherwise you will see no serial output from 428 sandbox. The emulated UART will display to the console and console 429 input will be fed into the UART. This allows you to interact with 430 U-Boot. 431 432 The operation of the console is controlled by the -t command-line 433 flag. In raw mode, U-Boot sees all characters from the terminal 434 before they are processed, including Ctrl-C. In cooked mode, Ctrl-C 435 is processed by the terminal, and terminates U-Boot. Valid options 436 are: 437 438 -t raw-with-sigs Raw mode, Ctrl-C will terminate U-Boot 439 -t raw Raw mode, Ctrl-C is processed by U-Boot 440 -t cooked Cooked mode, Ctrl-C terminates 441 442config UNIPHIER_SERIAL 443 bool "Support for UniPhier on-chip UART" 444 depends on ARCH_UNIPHIER 445 default y 446 help 447 If you have a UniPhier based board and want to use the on-chip 448 serial ports, say Y to this option. If unsure, say N. 449 450config XILINX_UARTLITE 451 bool "Xilinx Uarlite support" 452 depends on DM_SERIAL && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP || 4xx) 453 help 454 If you have a Xilinx based board and want to use the uartlite 455 serial ports, say Y to this option. If unsure, say N. 456 457config MESON_SERIAL 458 bool "Support for Amlogic Meson UART" 459 depends on DM_SERIAL && ARCH_MESON 460 help 461 If you have an Amlogic Meson based board and want to use the on-chip 462 serial ports, say Y to this option. If unsure, say N. 463 464config MSM_SERIAL 465 bool "Qualcomm on-chip UART" 466 depends on DM_SERIAL 467 help 468 Support Data Mover UART used on Qualcomm Snapdragon SoCs. 469 It should support all Qualcomm devices with UARTDM version 1.4, 470 for example APQ8016 and MSM8916. 471 Single baudrate is supported in current implementation (115200). 472 473config PXA_SERIAL 474 bool "PXA serial port support" 475 help 476 If you have a machine based on a Marvell XScale PXA2xx CPU you 477 can enable its onboard serial ports by enabling this option. 478 479config STI_ASC_SERIAL 480 bool "STMicroelectronics on-chip UART" 481 depends on DM_SERIAL && ARCH_STI 482 help 483 Select this to enable Asynchronous Serial Controller available 484 on STiH410 SoC. This is a basic implementation, it supports 485 following baudrate 9600, 19200, 38400, 57600 and 115200. 486 487endmenu 488