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